1c6fd2807SJeff Garzik /* 2c6fd2807SJeff Garzik * libata-core.c - helper library for ATA 3c6fd2807SJeff Garzik * 4c6fd2807SJeff Garzik * Maintained by: Jeff Garzik <jgarzik@pobox.com> 5c6fd2807SJeff Garzik * Please ALWAYS copy linux-ide@vger.kernel.org 6c6fd2807SJeff Garzik * on emails. 7c6fd2807SJeff Garzik * 8c6fd2807SJeff Garzik * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9c6fd2807SJeff Garzik * Copyright 2003-2004 Jeff Garzik 10c6fd2807SJeff Garzik * 11c6fd2807SJeff Garzik * 12c6fd2807SJeff Garzik * This program is free software; you can redistribute it and/or modify 13c6fd2807SJeff Garzik * it under the terms of the GNU General Public License as published by 14c6fd2807SJeff Garzik * the Free Software Foundation; either version 2, or (at your option) 15c6fd2807SJeff Garzik * any later version. 16c6fd2807SJeff Garzik * 17c6fd2807SJeff Garzik * This program is distributed in the hope that it will be useful, 18c6fd2807SJeff Garzik * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c6fd2807SJeff Garzik * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c6fd2807SJeff Garzik * GNU General Public License for more details. 21c6fd2807SJeff Garzik * 22c6fd2807SJeff Garzik * You should have received a copy of the GNU General Public License 23c6fd2807SJeff Garzik * along with this program; see the file COPYING. If not, write to 24c6fd2807SJeff Garzik * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25c6fd2807SJeff Garzik * 26c6fd2807SJeff Garzik * 27c6fd2807SJeff Garzik * libata documentation is available via 'make {ps|pdf}docs', 28c6fd2807SJeff Garzik * as Documentation/DocBook/libata.* 29c6fd2807SJeff Garzik * 30c6fd2807SJeff Garzik * Hardware documentation available from http://www.t13.org/ and 31c6fd2807SJeff Garzik * http://www.sata-io.org/ 32c6fd2807SJeff Garzik * 3392c52c52SAlan Cox * Standards documents from: 3492c52c52SAlan Cox * http://www.t13.org (ATA standards, PCI DMA IDE spec) 3592c52c52SAlan Cox * http://www.t10.org (SCSI MMC - for ATAPI MMC) 3692c52c52SAlan Cox * http://www.sata-io.org (SATA) 3792c52c52SAlan Cox * http://www.compactflash.org (CF) 3892c52c52SAlan Cox * http://www.qic.org (QIC157 - Tape and DSC) 3992c52c52SAlan Cox * http://www.ce-ata.org (CE-ATA: not supported) 4092c52c52SAlan Cox * 41c6fd2807SJeff Garzik */ 42c6fd2807SJeff Garzik 43c6fd2807SJeff Garzik #include <linux/kernel.h> 44c6fd2807SJeff Garzik #include <linux/module.h> 45c6fd2807SJeff Garzik #include <linux/pci.h> 46c6fd2807SJeff Garzik #include <linux/init.h> 47c6fd2807SJeff Garzik #include <linux/list.h> 48c6fd2807SJeff Garzik #include <linux/mm.h> 49c6fd2807SJeff Garzik #include <linux/highmem.h> 50c6fd2807SJeff Garzik #include <linux/spinlock.h> 51c6fd2807SJeff Garzik #include <linux/blkdev.h> 52c6fd2807SJeff Garzik #include <linux/delay.h> 53c6fd2807SJeff Garzik #include <linux/timer.h> 54c6fd2807SJeff Garzik #include <linux/interrupt.h> 55c6fd2807SJeff Garzik #include <linux/completion.h> 56c6fd2807SJeff Garzik #include <linux/suspend.h> 57c6fd2807SJeff Garzik #include <linux/workqueue.h> 58c6fd2807SJeff Garzik #include <linux/jiffies.h> 59c6fd2807SJeff Garzik #include <linux/scatterlist.h> 602dcb407eSJeff Garzik #include <linux/io.h> 61c6fd2807SJeff Garzik #include <scsi/scsi.h> 62c6fd2807SJeff Garzik #include <scsi/scsi_cmnd.h> 63c6fd2807SJeff Garzik #include <scsi/scsi_host.h> 64c6fd2807SJeff Garzik #include <linux/libata.h> 65c6fd2807SJeff Garzik #include <asm/semaphore.h> 66c6fd2807SJeff Garzik #include <asm/byteorder.h> 67140b5e59STejun Heo #include <linux/cdrom.h> 68c6fd2807SJeff Garzik 69c6fd2807SJeff Garzik #include "libata.h" 70c6fd2807SJeff Garzik 71fda0efc5SJeff Garzik 72c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 73c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 74c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 75c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 76c6fd2807SJeff Garzik 77c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 78c6fd2807SJeff Garzik u16 heads, u16 sectors); 79c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 80218f3d30SJeff Garzik static unsigned int ata_dev_set_feature(struct ata_device *dev, 81218f3d30SJeff Garzik u8 enable, u8 feature); 82c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 8375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 84c6fd2807SJeff Garzik 85f3187195STejun Heo unsigned int ata_print_id = 1; 86c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 87c6fd2807SJeff Garzik 88c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 89c6fd2807SJeff Garzik 9033267325STejun Heo struct ata_force_param { 9133267325STejun Heo const char *name; 9233267325STejun Heo unsigned int cbl; 9333267325STejun Heo int spd_limit; 9433267325STejun Heo unsigned long xfer_mask; 9533267325STejun Heo unsigned int horkage_on; 9633267325STejun Heo unsigned int horkage_off; 9733267325STejun Heo }; 9833267325STejun Heo 9933267325STejun Heo struct ata_force_ent { 10033267325STejun Heo int port; 10133267325STejun Heo int device; 10233267325STejun Heo struct ata_force_param param; 10333267325STejun Heo }; 10433267325STejun Heo 10533267325STejun Heo static struct ata_force_ent *ata_force_tbl; 10633267325STejun Heo static int ata_force_tbl_size; 10733267325STejun Heo 10833267325STejun Heo static char ata_force_param_buf[PAGE_SIZE] __initdata; 10933267325STejun Heo module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0444); 11033267325STejun Heo MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); 11133267325STejun Heo 112c6fd2807SJeff Garzik int atapi_enabled = 1; 113c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 114c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 115c6fd2807SJeff Garzik 116c5c61bdaSAdrian Bunk static int atapi_dmadir = 0; 117c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 118c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 119c6fd2807SJeff Garzik 120baf4fdfaSMark Lord int atapi_passthru16 = 1; 121baf4fdfaSMark Lord module_param(atapi_passthru16, int, 0444); 122baf4fdfaSMark Lord MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); 123baf4fdfaSMark Lord 124c6fd2807SJeff Garzik int libata_fua = 0; 125c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 126c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 127c6fd2807SJeff Garzik 1282dcb407eSJeff Garzik static int ata_ignore_hpa; 1291e999736SAlan Cox module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 1301e999736SAlan Cox MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 1311e999736SAlan Cox 132b3a70601SAlan Cox static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 133b3a70601SAlan Cox module_param_named(dma, libata_dma_mask, int, 0444); 134b3a70601SAlan Cox MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 135b3a70601SAlan Cox 136c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 137c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 138c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 139c6fd2807SJeff Garzik 1406ebe9d86SJeff Garzik int libata_noacpi = 0; 141d7d0dad6SJeff Garzik module_param_named(noacpi, libata_noacpi, int, 0444); 1426ebe9d86SJeff Garzik MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); 14311ef697bSKristen Carlson Accardi 144ae8d4ee7SAlan Cox int libata_allow_tpm = 0; 145ae8d4ee7SAlan Cox module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 146ae8d4ee7SAlan Cox MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); 147ae8d4ee7SAlan Cox 148c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 149c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 150c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 151c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 152c6fd2807SJeff Garzik 153c6fd2807SJeff Garzik 154c6fd2807SJeff Garzik /** 15533267325STejun Heo * ata_force_cbl - force cable type according to libata.force 1564cdfa1b3SRandy Dunlap * @ap: ATA port of interest 15733267325STejun Heo * 15833267325STejun Heo * Force cable type according to libata.force and whine about it. 15933267325STejun Heo * The last entry which has matching port number is used, so it 16033267325STejun Heo * can be specified as part of device force parameters. For 16133267325STejun Heo * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 16233267325STejun Heo * same effect. 16333267325STejun Heo * 16433267325STejun Heo * LOCKING: 16533267325STejun Heo * EH context. 16633267325STejun Heo */ 16733267325STejun Heo void ata_force_cbl(struct ata_port *ap) 16833267325STejun Heo { 16933267325STejun Heo int i; 17033267325STejun Heo 17133267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 17233267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 17333267325STejun Heo 17433267325STejun Heo if (fe->port != -1 && fe->port != ap->print_id) 17533267325STejun Heo continue; 17633267325STejun Heo 17733267325STejun Heo if (fe->param.cbl == ATA_CBL_NONE) 17833267325STejun Heo continue; 17933267325STejun Heo 18033267325STejun Heo ap->cbl = fe->param.cbl; 18133267325STejun Heo ata_port_printk(ap, KERN_NOTICE, 18233267325STejun Heo "FORCE: cable set to %s\n", fe->param.name); 18333267325STejun Heo return; 18433267325STejun Heo } 18533267325STejun Heo } 18633267325STejun Heo 18733267325STejun Heo /** 18833267325STejun Heo * ata_force_spd_limit - force SATA spd limit according to libata.force 18933267325STejun Heo * @link: ATA link of interest 19033267325STejun Heo * 19133267325STejun Heo * Force SATA spd limit according to libata.force and whine about 19233267325STejun Heo * it. When only the port part is specified (e.g. 1:), the limit 19333267325STejun Heo * applies to all links connected to both the host link and all 19433267325STejun Heo * fan-out ports connected via PMP. If the device part is 19533267325STejun Heo * specified as 0 (e.g. 1.00:), it specifies the first fan-out 19633267325STejun Heo * link not the host link. Device number 15 always points to the 19733267325STejun Heo * host link whether PMP is attached or not. 19833267325STejun Heo * 19933267325STejun Heo * LOCKING: 20033267325STejun Heo * EH context. 20133267325STejun Heo */ 20233267325STejun Heo static void ata_force_spd_limit(struct ata_link *link) 20333267325STejun Heo { 20433267325STejun Heo int linkno, i; 20533267325STejun Heo 20633267325STejun Heo if (ata_is_host_link(link)) 20733267325STejun Heo linkno = 15; 20833267325STejun Heo else 20933267325STejun Heo linkno = link->pmp; 21033267325STejun Heo 21133267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 21233267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 21333267325STejun Heo 21433267325STejun Heo if (fe->port != -1 && fe->port != link->ap->print_id) 21533267325STejun Heo continue; 21633267325STejun Heo 21733267325STejun Heo if (fe->device != -1 && fe->device != linkno) 21833267325STejun Heo continue; 21933267325STejun Heo 22033267325STejun Heo if (!fe->param.spd_limit) 22133267325STejun Heo continue; 22233267325STejun Heo 22333267325STejun Heo link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 22433267325STejun Heo ata_link_printk(link, KERN_NOTICE, 22533267325STejun Heo "FORCE: PHY spd limit set to %s\n", fe->param.name); 22633267325STejun Heo return; 22733267325STejun Heo } 22833267325STejun Heo } 22933267325STejun Heo 23033267325STejun Heo /** 23133267325STejun Heo * ata_force_xfermask - force xfermask according to libata.force 23233267325STejun Heo * @dev: ATA device of interest 23333267325STejun Heo * 23433267325STejun Heo * Force xfer_mask according to libata.force and whine about it. 23533267325STejun Heo * For consistency with link selection, device number 15 selects 23633267325STejun Heo * the first device connected to the host link. 23733267325STejun Heo * 23833267325STejun Heo * LOCKING: 23933267325STejun Heo * EH context. 24033267325STejun Heo */ 24133267325STejun Heo static void ata_force_xfermask(struct ata_device *dev) 24233267325STejun Heo { 24333267325STejun Heo int devno = dev->link->pmp + dev->devno; 24433267325STejun Heo int alt_devno = devno; 24533267325STejun Heo int i; 24633267325STejun Heo 24733267325STejun Heo /* allow n.15 for the first device attached to host port */ 24833267325STejun Heo if (ata_is_host_link(dev->link) && devno == 0) 24933267325STejun Heo alt_devno = 15; 25033267325STejun Heo 25133267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 25233267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 25333267325STejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 25433267325STejun Heo 25533267325STejun Heo if (fe->port != -1 && fe->port != dev->link->ap->print_id) 25633267325STejun Heo continue; 25733267325STejun Heo 25833267325STejun Heo if (fe->device != -1 && fe->device != devno && 25933267325STejun Heo fe->device != alt_devno) 26033267325STejun Heo continue; 26133267325STejun Heo 26233267325STejun Heo if (!fe->param.xfer_mask) 26333267325STejun Heo continue; 26433267325STejun Heo 26533267325STejun Heo ata_unpack_xfermask(fe->param.xfer_mask, 26633267325STejun Heo &pio_mask, &mwdma_mask, &udma_mask); 26733267325STejun Heo if (udma_mask) 26833267325STejun Heo dev->udma_mask = udma_mask; 26933267325STejun Heo else if (mwdma_mask) { 27033267325STejun Heo dev->udma_mask = 0; 27133267325STejun Heo dev->mwdma_mask = mwdma_mask; 27233267325STejun Heo } else { 27333267325STejun Heo dev->udma_mask = 0; 27433267325STejun Heo dev->mwdma_mask = 0; 27533267325STejun Heo dev->pio_mask = pio_mask; 27633267325STejun Heo } 27733267325STejun Heo 27833267325STejun Heo ata_dev_printk(dev, KERN_NOTICE, 27933267325STejun Heo "FORCE: xfer_mask set to %s\n", fe->param.name); 28033267325STejun Heo return; 28133267325STejun Heo } 28233267325STejun Heo } 28333267325STejun Heo 28433267325STejun Heo /** 28533267325STejun Heo * ata_force_horkage - force horkage according to libata.force 28633267325STejun Heo * @dev: ATA device of interest 28733267325STejun Heo * 28833267325STejun Heo * Force horkage according to libata.force and whine about it. 28933267325STejun Heo * For consistency with link selection, device number 15 selects 29033267325STejun Heo * the first device connected to the host link. 29133267325STejun Heo * 29233267325STejun Heo * LOCKING: 29333267325STejun Heo * EH context. 29433267325STejun Heo */ 29533267325STejun Heo static void ata_force_horkage(struct ata_device *dev) 29633267325STejun Heo { 29733267325STejun Heo int devno = dev->link->pmp + dev->devno; 29833267325STejun Heo int alt_devno = devno; 29933267325STejun Heo int i; 30033267325STejun Heo 30133267325STejun Heo /* allow n.15 for the first device attached to host port */ 30233267325STejun Heo if (ata_is_host_link(dev->link) && devno == 0) 30333267325STejun Heo alt_devno = 15; 30433267325STejun Heo 30533267325STejun Heo for (i = 0; i < ata_force_tbl_size; i++) { 30633267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 30733267325STejun Heo 30833267325STejun Heo if (fe->port != -1 && fe->port != dev->link->ap->print_id) 30933267325STejun Heo continue; 31033267325STejun Heo 31133267325STejun Heo if (fe->device != -1 && fe->device != devno && 31233267325STejun Heo fe->device != alt_devno) 31333267325STejun Heo continue; 31433267325STejun Heo 31533267325STejun Heo if (!(~dev->horkage & fe->param.horkage_on) && 31633267325STejun Heo !(dev->horkage & fe->param.horkage_off)) 31733267325STejun Heo continue; 31833267325STejun Heo 31933267325STejun Heo dev->horkage |= fe->param.horkage_on; 32033267325STejun Heo dev->horkage &= ~fe->param.horkage_off; 32133267325STejun Heo 32233267325STejun Heo ata_dev_printk(dev, KERN_NOTICE, 32333267325STejun Heo "FORCE: horkage modified (%s)\n", fe->param.name); 32433267325STejun Heo } 32533267325STejun Heo } 32633267325STejun Heo 32733267325STejun Heo /** 328c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 329c6fd2807SJeff Garzik * @tf: Taskfile to convert 330c6fd2807SJeff Garzik * @pmp: Port multiplier port 3319977126cSTejun Heo * @is_cmd: This FIS is for command 3329977126cSTejun Heo * @fis: Buffer into which data will output 333c6fd2807SJeff Garzik * 334c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 335c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 336c6fd2807SJeff Garzik * 337c6fd2807SJeff Garzik * LOCKING: 338c6fd2807SJeff Garzik * Inherited from caller. 339c6fd2807SJeff Garzik */ 3409977126cSTejun Heo void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) 341c6fd2807SJeff Garzik { 342c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 3439977126cSTejun Heo fis[1] = pmp & 0xf; /* Port multiplier number*/ 3449977126cSTejun Heo if (is_cmd) 3459977126cSTejun Heo fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ 3469977126cSTejun Heo 347c6fd2807SJeff Garzik fis[2] = tf->command; 348c6fd2807SJeff Garzik fis[3] = tf->feature; 349c6fd2807SJeff Garzik 350c6fd2807SJeff Garzik fis[4] = tf->lbal; 351c6fd2807SJeff Garzik fis[5] = tf->lbam; 352c6fd2807SJeff Garzik fis[6] = tf->lbah; 353c6fd2807SJeff Garzik fis[7] = tf->device; 354c6fd2807SJeff Garzik 355c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 356c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 357c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 358c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 359c6fd2807SJeff Garzik 360c6fd2807SJeff Garzik fis[12] = tf->nsect; 361c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 362c6fd2807SJeff Garzik fis[14] = 0; 363c6fd2807SJeff Garzik fis[15] = tf->ctl; 364c6fd2807SJeff Garzik 365c6fd2807SJeff Garzik fis[16] = 0; 366c6fd2807SJeff Garzik fis[17] = 0; 367c6fd2807SJeff Garzik fis[18] = 0; 368c6fd2807SJeff Garzik fis[19] = 0; 369c6fd2807SJeff Garzik } 370c6fd2807SJeff Garzik 371c6fd2807SJeff Garzik /** 372c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 373c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 374c6fd2807SJeff Garzik * @tf: Taskfile to output 375c6fd2807SJeff Garzik * 376c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 377c6fd2807SJeff Garzik * 378c6fd2807SJeff Garzik * LOCKING: 379c6fd2807SJeff Garzik * Inherited from caller. 380c6fd2807SJeff Garzik */ 381c6fd2807SJeff Garzik 382c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 383c6fd2807SJeff Garzik { 384c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 385c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 386c6fd2807SJeff Garzik 387c6fd2807SJeff Garzik tf->lbal = fis[4]; 388c6fd2807SJeff Garzik tf->lbam = fis[5]; 389c6fd2807SJeff Garzik tf->lbah = fis[6]; 390c6fd2807SJeff Garzik tf->device = fis[7]; 391c6fd2807SJeff Garzik 392c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 393c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 394c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 395c6fd2807SJeff Garzik 396c6fd2807SJeff Garzik tf->nsect = fis[12]; 397c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 398c6fd2807SJeff Garzik } 399c6fd2807SJeff Garzik 400c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 401c6fd2807SJeff Garzik /* pio multi */ 402c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 403c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 404c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 405c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 406c6fd2807SJeff Garzik 0, 407c6fd2807SJeff Garzik 0, 408c6fd2807SJeff Garzik 0, 409c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 410c6fd2807SJeff Garzik /* pio */ 411c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 412c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 413c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 414c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 415c6fd2807SJeff Garzik 0, 416c6fd2807SJeff Garzik 0, 417c6fd2807SJeff Garzik 0, 418c6fd2807SJeff Garzik 0, 419c6fd2807SJeff Garzik /* dma */ 420c6fd2807SJeff Garzik ATA_CMD_READ, 421c6fd2807SJeff Garzik ATA_CMD_WRITE, 422c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 423c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 424c6fd2807SJeff Garzik 0, 425c6fd2807SJeff Garzik 0, 426c6fd2807SJeff Garzik 0, 427c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 428c6fd2807SJeff Garzik }; 429c6fd2807SJeff Garzik 430c6fd2807SJeff Garzik /** 431c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 432bd056d7eSTejun Heo * @tf: command to examine and configure 433bd056d7eSTejun Heo * @dev: device tf belongs to 434c6fd2807SJeff Garzik * 435c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 436c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 437c6fd2807SJeff Garzik * 438c6fd2807SJeff Garzik * LOCKING: 439c6fd2807SJeff Garzik * caller. 440c6fd2807SJeff Garzik */ 441bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 442c6fd2807SJeff Garzik { 443c6fd2807SJeff Garzik u8 cmd; 444c6fd2807SJeff Garzik 445c6fd2807SJeff Garzik int index, fua, lba48, write; 446c6fd2807SJeff Garzik 447c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 448c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 449c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 450c6fd2807SJeff Garzik 451c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 452c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 453c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 4549af5c9c9STejun Heo } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 455c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 456c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 457c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 458c6fd2807SJeff Garzik } else { 459c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 460c6fd2807SJeff Garzik index = 16; 461c6fd2807SJeff Garzik } 462c6fd2807SJeff Garzik 463c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 464c6fd2807SJeff Garzik if (cmd) { 465c6fd2807SJeff Garzik tf->command = cmd; 466c6fd2807SJeff Garzik return 0; 467c6fd2807SJeff Garzik } 468c6fd2807SJeff Garzik return -1; 469c6fd2807SJeff Garzik } 470c6fd2807SJeff Garzik 471c6fd2807SJeff Garzik /** 47235b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 47335b649feSTejun Heo * @tf: ATA taskfile of interest 47435b649feSTejun Heo * @dev: ATA device @tf belongs to 47535b649feSTejun Heo * 47635b649feSTejun Heo * LOCKING: 47735b649feSTejun Heo * None. 47835b649feSTejun Heo * 47935b649feSTejun Heo * Read block address from @tf. This function can handle all 48035b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 48135b649feSTejun Heo * flags select the address format to use. 48235b649feSTejun Heo * 48335b649feSTejun Heo * RETURNS: 48435b649feSTejun Heo * Block address read from @tf. 48535b649feSTejun Heo */ 48635b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 48735b649feSTejun Heo { 48835b649feSTejun Heo u64 block = 0; 48935b649feSTejun Heo 49035b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 49135b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 49235b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 49335b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 49435b649feSTejun Heo block |= tf->hob_lbal << 24; 49535b649feSTejun Heo } else 49635b649feSTejun Heo block |= (tf->device & 0xf) << 24; 49735b649feSTejun Heo 49835b649feSTejun Heo block |= tf->lbah << 16; 49935b649feSTejun Heo block |= tf->lbam << 8; 50035b649feSTejun Heo block |= tf->lbal; 50135b649feSTejun Heo } else { 50235b649feSTejun Heo u32 cyl, head, sect; 50335b649feSTejun Heo 50435b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 50535b649feSTejun Heo head = tf->device & 0xf; 50635b649feSTejun Heo sect = tf->lbal; 50735b649feSTejun Heo 50835b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 50935b649feSTejun Heo } 51035b649feSTejun Heo 51135b649feSTejun Heo return block; 51235b649feSTejun Heo } 51335b649feSTejun Heo 51435b649feSTejun Heo /** 515bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 516bd056d7eSTejun Heo * @tf: Target ATA taskfile 517bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 518bd056d7eSTejun Heo * @block: Block address 519bd056d7eSTejun Heo * @n_block: Number of blocks 520bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 521bd056d7eSTejun Heo * @tag: tag 522bd056d7eSTejun Heo * 523bd056d7eSTejun Heo * LOCKING: 524bd056d7eSTejun Heo * None. 525bd056d7eSTejun Heo * 526bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 527bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 528bd056d7eSTejun Heo * 529bd056d7eSTejun Heo * RETURNS: 530bd056d7eSTejun Heo * 531bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 532bd056d7eSTejun Heo * -EINVAL if the request is invalid. 533bd056d7eSTejun Heo */ 534bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 535bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 536bd056d7eSTejun Heo unsigned int tag) 537bd056d7eSTejun Heo { 538bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 539bd056d7eSTejun Heo tf->flags |= tf_flags; 540bd056d7eSTejun Heo 5416d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 542bd056d7eSTejun Heo /* yay, NCQ */ 543bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 544bd056d7eSTejun Heo return -ERANGE; 545bd056d7eSTejun Heo 546bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 547bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 548bd056d7eSTejun Heo 549bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 550bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 551bd056d7eSTejun Heo else 552bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 553bd056d7eSTejun Heo 554bd056d7eSTejun Heo tf->nsect = tag << 3; 555bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 556bd056d7eSTejun Heo tf->feature = n_block & 0xff; 557bd056d7eSTejun Heo 558bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 559bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 560bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 561bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 562bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 563bd056d7eSTejun Heo tf->lbal = block & 0xff; 564bd056d7eSTejun Heo 565bd056d7eSTejun Heo tf->device = 1 << 6; 566bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 567bd056d7eSTejun Heo tf->device |= 1 << 7; 568bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 569bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 570bd056d7eSTejun Heo 571bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 572bd056d7eSTejun Heo /* use LBA28 */ 573bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 574bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 575bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 576bd056d7eSTejun Heo return -ERANGE; 577bd056d7eSTejun Heo 578bd056d7eSTejun Heo /* use LBA48 */ 579bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 580bd056d7eSTejun Heo 581bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 582bd056d7eSTejun Heo 583bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 584bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 585bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 586bd056d7eSTejun Heo } else 587bd056d7eSTejun Heo /* request too large even for LBA48 */ 588bd056d7eSTejun Heo return -ERANGE; 589bd056d7eSTejun Heo 590bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 591bd056d7eSTejun Heo return -EINVAL; 592bd056d7eSTejun Heo 593bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 594bd056d7eSTejun Heo 595bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 596bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 597bd056d7eSTejun Heo tf->lbal = block & 0xff; 598bd056d7eSTejun Heo 599bd056d7eSTejun Heo tf->device |= ATA_LBA; 600bd056d7eSTejun Heo } else { 601bd056d7eSTejun Heo /* CHS */ 602bd056d7eSTejun Heo u32 sect, head, cyl, track; 603bd056d7eSTejun Heo 604bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 605bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 606bd056d7eSTejun Heo return -ERANGE; 607bd056d7eSTejun Heo 608bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 609bd056d7eSTejun Heo return -EINVAL; 610bd056d7eSTejun Heo 611bd056d7eSTejun Heo /* Convert LBA to CHS */ 612bd056d7eSTejun Heo track = (u32)block / dev->sectors; 613bd056d7eSTejun Heo cyl = track / dev->heads; 614bd056d7eSTejun Heo head = track % dev->heads; 615bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 616bd056d7eSTejun Heo 617bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 618bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 619bd056d7eSTejun Heo 620bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 621bd056d7eSTejun Heo Cylinder: 0-65535 622bd056d7eSTejun Heo Head: 0-15 623bd056d7eSTejun Heo Sector: 1-255*/ 624bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 625bd056d7eSTejun Heo return -ERANGE; 626bd056d7eSTejun Heo 627bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 628bd056d7eSTejun Heo tf->lbal = sect; 629bd056d7eSTejun Heo tf->lbam = cyl; 630bd056d7eSTejun Heo tf->lbah = cyl >> 8; 631bd056d7eSTejun Heo tf->device |= head; 632bd056d7eSTejun Heo } 633bd056d7eSTejun Heo 634bd056d7eSTejun Heo return 0; 635bd056d7eSTejun Heo } 636bd056d7eSTejun Heo 637bd056d7eSTejun Heo /** 638c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 639c6fd2807SJeff Garzik * @pio_mask: pio_mask 640c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 641c6fd2807SJeff Garzik * @udma_mask: udma_mask 642c6fd2807SJeff Garzik * 643c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 644c6fd2807SJeff Garzik * unsigned int xfer_mask. 645c6fd2807SJeff Garzik * 646c6fd2807SJeff Garzik * LOCKING: 647c6fd2807SJeff Garzik * None. 648c6fd2807SJeff Garzik * 649c6fd2807SJeff Garzik * RETURNS: 650c6fd2807SJeff Garzik * Packed xfer_mask. 651c6fd2807SJeff Garzik */ 6527dc951aeSTejun Heo unsigned long ata_pack_xfermask(unsigned long pio_mask, 6537dc951aeSTejun Heo unsigned long mwdma_mask, 6547dc951aeSTejun Heo unsigned long udma_mask) 655c6fd2807SJeff Garzik { 656c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 657c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 658c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 659c6fd2807SJeff Garzik } 660c6fd2807SJeff Garzik 661c6fd2807SJeff Garzik /** 662c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 663c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 664c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 665c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 666c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 667c6fd2807SJeff Garzik * 668c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 669c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 670c6fd2807SJeff Garzik */ 6717dc951aeSTejun Heo void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, 6727dc951aeSTejun Heo unsigned long *mwdma_mask, unsigned long *udma_mask) 673c6fd2807SJeff Garzik { 674c6fd2807SJeff Garzik if (pio_mask) 675c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 676c6fd2807SJeff Garzik if (mwdma_mask) 677c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 678c6fd2807SJeff Garzik if (udma_mask) 679c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 680c6fd2807SJeff Garzik } 681c6fd2807SJeff Garzik 682c6fd2807SJeff Garzik static const struct ata_xfer_ent { 683c6fd2807SJeff Garzik int shift, bits; 684c6fd2807SJeff Garzik u8 base; 685c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 68670cd071eSTejun Heo { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 68770cd071eSTejun Heo { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 68870cd071eSTejun Heo { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 689c6fd2807SJeff Garzik { -1, }, 690c6fd2807SJeff Garzik }; 691c6fd2807SJeff Garzik 692c6fd2807SJeff Garzik /** 693c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 694c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 695c6fd2807SJeff Garzik * 696c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 697c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 698c6fd2807SJeff Garzik * 699c6fd2807SJeff Garzik * LOCKING: 700c6fd2807SJeff Garzik * None. 701c6fd2807SJeff Garzik * 702c6fd2807SJeff Garzik * RETURNS: 70370cd071eSTejun Heo * Matching XFER_* value, 0xff if no match found. 704c6fd2807SJeff Garzik */ 7057dc951aeSTejun Heo u8 ata_xfer_mask2mode(unsigned long xfer_mask) 706c6fd2807SJeff Garzik { 707c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 708c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 709c6fd2807SJeff Garzik 710c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 711c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 712c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 71370cd071eSTejun Heo return 0xff; 714c6fd2807SJeff Garzik } 715c6fd2807SJeff Garzik 716c6fd2807SJeff Garzik /** 717c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 718c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 719c6fd2807SJeff Garzik * 720c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 721c6fd2807SJeff Garzik * 722c6fd2807SJeff Garzik * LOCKING: 723c6fd2807SJeff Garzik * None. 724c6fd2807SJeff Garzik * 725c6fd2807SJeff Garzik * RETURNS: 726c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 727c6fd2807SJeff Garzik */ 7287dc951aeSTejun Heo unsigned long ata_xfer_mode2mask(u8 xfer_mode) 729c6fd2807SJeff Garzik { 730c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 731c6fd2807SJeff Garzik 732c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 733c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 73470cd071eSTejun Heo return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 73570cd071eSTejun Heo & ~((1 << ent->shift) - 1); 736c6fd2807SJeff Garzik return 0; 737c6fd2807SJeff Garzik } 738c6fd2807SJeff Garzik 739c6fd2807SJeff Garzik /** 740c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 741c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 742c6fd2807SJeff Garzik * 743c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 744c6fd2807SJeff Garzik * 745c6fd2807SJeff Garzik * LOCKING: 746c6fd2807SJeff Garzik * None. 747c6fd2807SJeff Garzik * 748c6fd2807SJeff Garzik * RETURNS: 749c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 750c6fd2807SJeff Garzik */ 7517dc951aeSTejun Heo int ata_xfer_mode2shift(unsigned long xfer_mode) 752c6fd2807SJeff Garzik { 753c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 754c6fd2807SJeff Garzik 755c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 756c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 757c6fd2807SJeff Garzik return ent->shift; 758c6fd2807SJeff Garzik return -1; 759c6fd2807SJeff Garzik } 760c6fd2807SJeff Garzik 761c6fd2807SJeff Garzik /** 762c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 763c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 764c6fd2807SJeff Garzik * 765c6fd2807SJeff Garzik * Determine string which represents the highest speed 766c6fd2807SJeff Garzik * (highest bit in @modemask). 767c6fd2807SJeff Garzik * 768c6fd2807SJeff Garzik * LOCKING: 769c6fd2807SJeff Garzik * None. 770c6fd2807SJeff Garzik * 771c6fd2807SJeff Garzik * RETURNS: 772c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 773c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 774c6fd2807SJeff Garzik */ 7757dc951aeSTejun Heo const char *ata_mode_string(unsigned long xfer_mask) 776c6fd2807SJeff Garzik { 777c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 778c6fd2807SJeff Garzik "PIO0", 779c6fd2807SJeff Garzik "PIO1", 780c6fd2807SJeff Garzik "PIO2", 781c6fd2807SJeff Garzik "PIO3", 782c6fd2807SJeff Garzik "PIO4", 783b352e57dSAlan Cox "PIO5", 784b352e57dSAlan Cox "PIO6", 785c6fd2807SJeff Garzik "MWDMA0", 786c6fd2807SJeff Garzik "MWDMA1", 787c6fd2807SJeff Garzik "MWDMA2", 788b352e57dSAlan Cox "MWDMA3", 789b352e57dSAlan Cox "MWDMA4", 790c6fd2807SJeff Garzik "UDMA/16", 791c6fd2807SJeff Garzik "UDMA/25", 792c6fd2807SJeff Garzik "UDMA/33", 793c6fd2807SJeff Garzik "UDMA/44", 794c6fd2807SJeff Garzik "UDMA/66", 795c6fd2807SJeff Garzik "UDMA/100", 796c6fd2807SJeff Garzik "UDMA/133", 797c6fd2807SJeff Garzik "UDMA7", 798c6fd2807SJeff Garzik }; 799c6fd2807SJeff Garzik int highbit; 800c6fd2807SJeff Garzik 801c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 802c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 803c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 804c6fd2807SJeff Garzik return "<n/a>"; 805c6fd2807SJeff Garzik } 806c6fd2807SJeff Garzik 807c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 808c6fd2807SJeff Garzik { 809c6fd2807SJeff Garzik static const char * const spd_str[] = { 810c6fd2807SJeff Garzik "1.5 Gbps", 811c6fd2807SJeff Garzik "3.0 Gbps", 812c6fd2807SJeff Garzik }; 813c6fd2807SJeff Garzik 814c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 815c6fd2807SJeff Garzik return "<unknown>"; 816c6fd2807SJeff Garzik return spd_str[spd - 1]; 817c6fd2807SJeff Garzik } 818c6fd2807SJeff Garzik 819c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 820c6fd2807SJeff Garzik { 82109d7f9b0STejun Heo if (ata_dev_enabled(dev)) { 8229af5c9c9STejun Heo if (ata_msg_drv(dev->link->ap)) 823c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 824562f0c2dSTejun Heo ata_acpi_on_disable(dev); 8254ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 8264ae72a1eSTejun Heo ATA_DNXFER_QUIET); 827c6fd2807SJeff Garzik dev->class++; 828c6fd2807SJeff Garzik } 829c6fd2807SJeff Garzik } 830c6fd2807SJeff Garzik 831ca77329fSKristen Carlson Accardi static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) 832ca77329fSKristen Carlson Accardi { 833ca77329fSKristen Carlson Accardi struct ata_link *link = dev->link; 834ca77329fSKristen Carlson Accardi struct ata_port *ap = link->ap; 835ca77329fSKristen Carlson Accardi u32 scontrol; 836ca77329fSKristen Carlson Accardi unsigned int err_mask; 837ca77329fSKristen Carlson Accardi int rc; 838ca77329fSKristen Carlson Accardi 839ca77329fSKristen Carlson Accardi /* 840ca77329fSKristen Carlson Accardi * disallow DIPM for drivers which haven't set 841ca77329fSKristen Carlson Accardi * ATA_FLAG_IPM. This is because when DIPM is enabled, 842ca77329fSKristen Carlson Accardi * phy ready will be set in the interrupt status on 843ca77329fSKristen Carlson Accardi * state changes, which will cause some drivers to 844ca77329fSKristen Carlson Accardi * think there are errors - additionally drivers will 845ca77329fSKristen Carlson Accardi * need to disable hot plug. 846ca77329fSKristen Carlson Accardi */ 847ca77329fSKristen Carlson Accardi if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { 848ca77329fSKristen Carlson Accardi ap->pm_policy = NOT_AVAILABLE; 849ca77329fSKristen Carlson Accardi return -EINVAL; 850ca77329fSKristen Carlson Accardi } 851ca77329fSKristen Carlson Accardi 852ca77329fSKristen Carlson Accardi /* 853ca77329fSKristen Carlson Accardi * For DIPM, we will only enable it for the 854ca77329fSKristen Carlson Accardi * min_power setting. 855ca77329fSKristen Carlson Accardi * 856ca77329fSKristen Carlson Accardi * Why? Because Disks are too stupid to know that 857ca77329fSKristen Carlson Accardi * If the host rejects a request to go to SLUMBER 858ca77329fSKristen Carlson Accardi * they should retry at PARTIAL, and instead it 859ca77329fSKristen Carlson Accardi * just would give up. So, for medium_power to 860ca77329fSKristen Carlson Accardi * work at all, we need to only allow HIPM. 861ca77329fSKristen Carlson Accardi */ 862ca77329fSKristen Carlson Accardi rc = sata_scr_read(link, SCR_CONTROL, &scontrol); 863ca77329fSKristen Carlson Accardi if (rc) 864ca77329fSKristen Carlson Accardi return rc; 865ca77329fSKristen Carlson Accardi 866ca77329fSKristen Carlson Accardi switch (policy) { 867ca77329fSKristen Carlson Accardi case MIN_POWER: 868ca77329fSKristen Carlson Accardi /* no restrictions on IPM transitions */ 869ca77329fSKristen Carlson Accardi scontrol &= ~(0x3 << 8); 870ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 871ca77329fSKristen Carlson Accardi if (rc) 872ca77329fSKristen Carlson Accardi return rc; 873ca77329fSKristen Carlson Accardi 874ca77329fSKristen Carlson Accardi /* enable DIPM */ 875ca77329fSKristen Carlson Accardi if (dev->flags & ATA_DFLAG_DIPM) 876ca77329fSKristen Carlson Accardi err_mask = ata_dev_set_feature(dev, 877ca77329fSKristen Carlson Accardi SETFEATURES_SATA_ENABLE, SATA_DIPM); 878ca77329fSKristen Carlson Accardi break; 879ca77329fSKristen Carlson Accardi case MEDIUM_POWER: 880ca77329fSKristen Carlson Accardi /* allow IPM to PARTIAL */ 881ca77329fSKristen Carlson Accardi scontrol &= ~(0x1 << 8); 882ca77329fSKristen Carlson Accardi scontrol |= (0x2 << 8); 883ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 884ca77329fSKristen Carlson Accardi if (rc) 885ca77329fSKristen Carlson Accardi return rc; 886ca77329fSKristen Carlson Accardi 887f5456b63SKristen Carlson Accardi /* 888f5456b63SKristen Carlson Accardi * we don't have to disable DIPM since IPM flags 889f5456b63SKristen Carlson Accardi * disallow transitions to SLUMBER, which effectively 890f5456b63SKristen Carlson Accardi * disable DIPM if it does not support PARTIAL 891f5456b63SKristen Carlson Accardi */ 892ca77329fSKristen Carlson Accardi break; 893ca77329fSKristen Carlson Accardi case NOT_AVAILABLE: 894ca77329fSKristen Carlson Accardi case MAX_PERFORMANCE: 895ca77329fSKristen Carlson Accardi /* disable all IPM transitions */ 896ca77329fSKristen Carlson Accardi scontrol |= (0x3 << 8); 897ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 898ca77329fSKristen Carlson Accardi if (rc) 899ca77329fSKristen Carlson Accardi return rc; 900ca77329fSKristen Carlson Accardi 901f5456b63SKristen Carlson Accardi /* 902f5456b63SKristen Carlson Accardi * we don't have to disable DIPM since IPM flags 903f5456b63SKristen Carlson Accardi * disallow all transitions which effectively 904f5456b63SKristen Carlson Accardi * disable DIPM anyway. 905f5456b63SKristen Carlson Accardi */ 906ca77329fSKristen Carlson Accardi break; 907ca77329fSKristen Carlson Accardi } 908ca77329fSKristen Carlson Accardi 909ca77329fSKristen Carlson Accardi /* FIXME: handle SET FEATURES failure */ 910ca77329fSKristen Carlson Accardi (void) err_mask; 911ca77329fSKristen Carlson Accardi 912ca77329fSKristen Carlson Accardi return 0; 913ca77329fSKristen Carlson Accardi } 914ca77329fSKristen Carlson Accardi 915ca77329fSKristen Carlson Accardi /** 916ca77329fSKristen Carlson Accardi * ata_dev_enable_pm - enable SATA interface power management 91748166fd9SStephen Hemminger * @dev: device to enable power management 91848166fd9SStephen Hemminger * @policy: the link power management policy 919ca77329fSKristen Carlson Accardi * 920ca77329fSKristen Carlson Accardi * Enable SATA Interface power management. This will enable 921ca77329fSKristen Carlson Accardi * Device Interface Power Management (DIPM) for min_power 922ca77329fSKristen Carlson Accardi * policy, and then call driver specific callbacks for 923ca77329fSKristen Carlson Accardi * enabling Host Initiated Power management. 924ca77329fSKristen Carlson Accardi * 925ca77329fSKristen Carlson Accardi * Locking: Caller. 926ca77329fSKristen Carlson Accardi * Returns: -EINVAL if IPM is not supported, 0 otherwise. 927ca77329fSKristen Carlson Accardi */ 928ca77329fSKristen Carlson Accardi void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) 929ca77329fSKristen Carlson Accardi { 930ca77329fSKristen Carlson Accardi int rc = 0; 931ca77329fSKristen Carlson Accardi struct ata_port *ap = dev->link->ap; 932ca77329fSKristen Carlson Accardi 933ca77329fSKristen Carlson Accardi /* set HIPM first, then DIPM */ 934ca77329fSKristen Carlson Accardi if (ap->ops->enable_pm) 935ca77329fSKristen Carlson Accardi rc = ap->ops->enable_pm(ap, policy); 936ca77329fSKristen Carlson Accardi if (rc) 937ca77329fSKristen Carlson Accardi goto enable_pm_out; 938ca77329fSKristen Carlson Accardi rc = ata_dev_set_dipm(dev, policy); 939ca77329fSKristen Carlson Accardi 940ca77329fSKristen Carlson Accardi enable_pm_out: 941ca77329fSKristen Carlson Accardi if (rc) 942ca77329fSKristen Carlson Accardi ap->pm_policy = MAX_PERFORMANCE; 943ca77329fSKristen Carlson Accardi else 944ca77329fSKristen Carlson Accardi ap->pm_policy = policy; 945ca77329fSKristen Carlson Accardi return /* rc */; /* hopefully we can use 'rc' eventually */ 946ca77329fSKristen Carlson Accardi } 947ca77329fSKristen Carlson Accardi 9481992a5edSStephen Rothwell #ifdef CONFIG_PM 949ca77329fSKristen Carlson Accardi /** 950ca77329fSKristen Carlson Accardi * ata_dev_disable_pm - disable SATA interface power management 95148166fd9SStephen Hemminger * @dev: device to disable power management 952ca77329fSKristen Carlson Accardi * 953ca77329fSKristen Carlson Accardi * Disable SATA Interface power management. This will disable 954ca77329fSKristen Carlson Accardi * Device Interface Power Management (DIPM) without changing 955ca77329fSKristen Carlson Accardi * policy, call driver specific callbacks for disabling Host 956ca77329fSKristen Carlson Accardi * Initiated Power management. 957ca77329fSKristen Carlson Accardi * 958ca77329fSKristen Carlson Accardi * Locking: Caller. 959ca77329fSKristen Carlson Accardi * Returns: void 960ca77329fSKristen Carlson Accardi */ 961ca77329fSKristen Carlson Accardi static void ata_dev_disable_pm(struct ata_device *dev) 962ca77329fSKristen Carlson Accardi { 963ca77329fSKristen Carlson Accardi struct ata_port *ap = dev->link->ap; 964ca77329fSKristen Carlson Accardi 965ca77329fSKristen Carlson Accardi ata_dev_set_dipm(dev, MAX_PERFORMANCE); 966ca77329fSKristen Carlson Accardi if (ap->ops->disable_pm) 967ca77329fSKristen Carlson Accardi ap->ops->disable_pm(ap); 968ca77329fSKristen Carlson Accardi } 9691992a5edSStephen Rothwell #endif /* CONFIG_PM */ 970ca77329fSKristen Carlson Accardi 971ca77329fSKristen Carlson Accardi void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) 972ca77329fSKristen Carlson Accardi { 973ca77329fSKristen Carlson Accardi ap->pm_policy = policy; 974ca77329fSKristen Carlson Accardi ap->link.eh_info.action |= ATA_EHI_LPM; 975ca77329fSKristen Carlson Accardi ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; 976ca77329fSKristen Carlson Accardi ata_port_schedule_eh(ap); 977ca77329fSKristen Carlson Accardi } 978ca77329fSKristen Carlson Accardi 9791992a5edSStephen Rothwell #ifdef CONFIG_PM 980ca77329fSKristen Carlson Accardi static void ata_lpm_enable(struct ata_host *host) 981ca77329fSKristen Carlson Accardi { 982ca77329fSKristen Carlson Accardi struct ata_link *link; 983ca77329fSKristen Carlson Accardi struct ata_port *ap; 984ca77329fSKristen Carlson Accardi struct ata_device *dev; 985ca77329fSKristen Carlson Accardi int i; 986ca77329fSKristen Carlson Accardi 987ca77329fSKristen Carlson Accardi for (i = 0; i < host->n_ports; i++) { 988ca77329fSKristen Carlson Accardi ap = host->ports[i]; 989ca77329fSKristen Carlson Accardi ata_port_for_each_link(link, ap) { 990ca77329fSKristen Carlson Accardi ata_link_for_each_dev(dev, link) 991ca77329fSKristen Carlson Accardi ata_dev_disable_pm(dev); 992ca77329fSKristen Carlson Accardi } 993ca77329fSKristen Carlson Accardi } 994ca77329fSKristen Carlson Accardi } 995ca77329fSKristen Carlson Accardi 996ca77329fSKristen Carlson Accardi static void ata_lpm_disable(struct ata_host *host) 997ca77329fSKristen Carlson Accardi { 998ca77329fSKristen Carlson Accardi int i; 999ca77329fSKristen Carlson Accardi 1000ca77329fSKristen Carlson Accardi for (i = 0; i < host->n_ports; i++) { 1001ca77329fSKristen Carlson Accardi struct ata_port *ap = host->ports[i]; 1002ca77329fSKristen Carlson Accardi ata_lpm_schedule(ap, ap->pm_policy); 1003ca77329fSKristen Carlson Accardi } 1004ca77329fSKristen Carlson Accardi } 10051992a5edSStephen Rothwell #endif /* CONFIG_PM */ 1006ca77329fSKristen Carlson Accardi 1007ca77329fSKristen Carlson Accardi 1008c6fd2807SJeff Garzik /** 1009c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 1010c6fd2807SJeff Garzik * @ap: ATA channel to examine 1011c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 1012c6fd2807SJeff Garzik * 10130d5ff566STejun Heo * This technique was originally described in 10140d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 10150d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 10160d5ff566STejun Heo * 10170d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 10180d5ff566STejun Heo * and if a device is present, it will respond by 10190d5ff566STejun Heo * correctly storing and echoing back the 10200d5ff566STejun Heo * ATA shadow register contents. 1021c6fd2807SJeff Garzik * 1022c6fd2807SJeff Garzik * LOCKING: 1023c6fd2807SJeff Garzik * caller. 1024c6fd2807SJeff Garzik */ 1025c6fd2807SJeff Garzik 10260d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 1027c6fd2807SJeff Garzik { 10280d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 10290d5ff566STejun Heo u8 nsect, lbal; 10300d5ff566STejun Heo 10310d5ff566STejun Heo ap->ops->dev_select(ap, device); 10320d5ff566STejun Heo 10330d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 10340d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 10350d5ff566STejun Heo 10360d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 10370d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 10380d5ff566STejun Heo 10390d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 10400d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 10410d5ff566STejun Heo 10420d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 10430d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 10440d5ff566STejun Heo 10450d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 10460d5ff566STejun Heo return 1; /* we found a device */ 10470d5ff566STejun Heo 10480d5ff566STejun Heo return 0; /* nothing found */ 1049c6fd2807SJeff Garzik } 1050c6fd2807SJeff Garzik 1051c6fd2807SJeff Garzik /** 1052c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 1053c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 1054c6fd2807SJeff Garzik * 1055c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 1056c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 1057c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 1058c6fd2807SJeff Garzik * 1059c6fd2807SJeff Garzik * LOCKING: 1060c6fd2807SJeff Garzik * None. 1061c6fd2807SJeff Garzik * 1062c6fd2807SJeff Garzik * RETURNS: 1063633273a3STejun Heo * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or 1064633273a3STejun Heo * %ATA_DEV_UNKNOWN the event of failure. 1065c6fd2807SJeff Garzik */ 1066c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1067c6fd2807SJeff Garzik { 1068c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 1069c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 1070c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 1071633273a3STejun Heo * 1072633273a3STejun Heo * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1073633273a3STejun Heo * signatures for ATA and ATAPI devices attached on SerialATA, 1074633273a3STejun Heo * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1075633273a3STejun Heo * spec has never mentioned about using different signatures 1076633273a3STejun Heo * for ATA/ATAPI devices. Then, Serial ATA II: Port 1077633273a3STejun Heo * Multiplier specification began to use 0x69/0x96 to identify 1078633273a3STejun Heo * port multpliers and 0x3c/0xc3 to identify SEMB device. 1079633273a3STejun Heo * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1080633273a3STejun Heo * 0x69/0x96 shortly and described them as reserved for 1081633273a3STejun Heo * SerialATA. 1082633273a3STejun Heo * 1083633273a3STejun Heo * We follow the current spec and consider that 0x69/0x96 1084633273a3STejun Heo * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 1085c6fd2807SJeff Garzik */ 1086633273a3STejun Heo if ((tf->lbam == 0) && (tf->lbah == 0)) { 1087c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 1088c6fd2807SJeff Garzik return ATA_DEV_ATA; 1089c6fd2807SJeff Garzik } 1090c6fd2807SJeff Garzik 1091633273a3STejun Heo if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { 1092c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 1093c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 1094c6fd2807SJeff Garzik } 1095c6fd2807SJeff Garzik 1096633273a3STejun Heo if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { 1097633273a3STejun Heo DPRINTK("found PMP device by sig\n"); 1098633273a3STejun Heo return ATA_DEV_PMP; 1099633273a3STejun Heo } 1100633273a3STejun Heo 1101633273a3STejun Heo if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { 11022dcb407eSJeff Garzik printk(KERN_INFO "ata: SEMB device ignored\n"); 1103633273a3STejun Heo return ATA_DEV_SEMB_UNSUP; /* not yet */ 1104633273a3STejun Heo } 1105633273a3STejun Heo 1106c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 1107c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 1108c6fd2807SJeff Garzik } 1109c6fd2807SJeff Garzik 1110c6fd2807SJeff Garzik /** 1111c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 11123f19859eSTejun Heo * @dev: ATA device to classify (starting at zero) 11133f19859eSTejun Heo * @present: device seems present 1114c6fd2807SJeff Garzik * @r_err: Value of error register on completion 1115c6fd2807SJeff Garzik * 1116c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 1117c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 1118c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 1119c6fd2807SJeff Garzik * and diagnostics. 1120c6fd2807SJeff Garzik * 1121c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 1122c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 1123c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 1124c6fd2807SJeff Garzik * 1125c6fd2807SJeff Garzik * LOCKING: 1126c6fd2807SJeff Garzik * caller. 1127c6fd2807SJeff Garzik * 1128c6fd2807SJeff Garzik * RETURNS: 1129c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 1130c6fd2807SJeff Garzik */ 11313f19859eSTejun Heo unsigned int ata_dev_try_classify(struct ata_device *dev, int present, 11323f19859eSTejun Heo u8 *r_err) 1133c6fd2807SJeff Garzik { 11343f19859eSTejun Heo struct ata_port *ap = dev->link->ap; 1135c6fd2807SJeff Garzik struct ata_taskfile tf; 1136c6fd2807SJeff Garzik unsigned int class; 1137c6fd2807SJeff Garzik u8 err; 1138c6fd2807SJeff Garzik 11393f19859eSTejun Heo ap->ops->dev_select(ap, dev->devno); 1140c6fd2807SJeff Garzik 1141c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 1142c6fd2807SJeff Garzik 1143c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 1144c6fd2807SJeff Garzik err = tf.feature; 1145c6fd2807SJeff Garzik if (r_err) 1146c6fd2807SJeff Garzik *r_err = err; 1147c6fd2807SJeff Garzik 1148c5038fc0SAlan Cox /* see if device passed diags: continue and warn later */ 1149c5038fc0SAlan Cox if (err == 0) 115093590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 11513f19859eSTejun Heo dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; 115293590859SAlan Cox else if (err == 1) 1153c6fd2807SJeff Garzik /* do nothing */ ; 11543f19859eSTejun Heo else if ((dev->devno == 0) && (err == 0x81)) 1155c6fd2807SJeff Garzik /* do nothing */ ; 1156c6fd2807SJeff Garzik else 1157c6fd2807SJeff Garzik return ATA_DEV_NONE; 1158c6fd2807SJeff Garzik 1159c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 1160c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 1161c6fd2807SJeff Garzik 1162d7fbee05STejun Heo if (class == ATA_DEV_UNKNOWN) { 1163d7fbee05STejun Heo /* If the device failed diagnostic, it's likely to 1164d7fbee05STejun Heo * have reported incorrect device signature too. 1165d7fbee05STejun Heo * Assume ATA device if the device seems present but 1166d7fbee05STejun Heo * device signature is invalid with diagnostic 1167d7fbee05STejun Heo * failure. 1168d7fbee05STejun Heo */ 1169d7fbee05STejun Heo if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) 1170d7fbee05STejun Heo class = ATA_DEV_ATA; 1171d7fbee05STejun Heo else 1172d7fbee05STejun Heo class = ATA_DEV_NONE; 1173d7fbee05STejun Heo } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 1174d7fbee05STejun Heo class = ATA_DEV_NONE; 1175d7fbee05STejun Heo 1176c6fd2807SJeff Garzik return class; 1177c6fd2807SJeff Garzik } 1178c6fd2807SJeff Garzik 1179c6fd2807SJeff Garzik /** 1180c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 1181c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 1182c6fd2807SJeff Garzik * @s: string into which data is output 1183c6fd2807SJeff Garzik * @ofs: offset into identify device page 1184c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 1185c6fd2807SJeff Garzik * 1186c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 1187c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 1188c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 1189c6fd2807SJeff Garzik * 1190c6fd2807SJeff Garzik * LOCKING: 1191c6fd2807SJeff Garzik * caller. 1192c6fd2807SJeff Garzik */ 1193c6fd2807SJeff Garzik 1194c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 1195c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 1196c6fd2807SJeff Garzik { 1197c6fd2807SJeff Garzik unsigned int c; 1198c6fd2807SJeff Garzik 1199c6fd2807SJeff Garzik while (len > 0) { 1200c6fd2807SJeff Garzik c = id[ofs] >> 8; 1201c6fd2807SJeff Garzik *s = c; 1202c6fd2807SJeff Garzik s++; 1203c6fd2807SJeff Garzik 1204c6fd2807SJeff Garzik c = id[ofs] & 0xff; 1205c6fd2807SJeff Garzik *s = c; 1206c6fd2807SJeff Garzik s++; 1207c6fd2807SJeff Garzik 1208c6fd2807SJeff Garzik ofs++; 1209c6fd2807SJeff Garzik len -= 2; 1210c6fd2807SJeff Garzik } 1211c6fd2807SJeff Garzik } 1212c6fd2807SJeff Garzik 1213c6fd2807SJeff Garzik /** 1214c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1215c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 1216c6fd2807SJeff Garzik * @s: string into which data is output 1217c6fd2807SJeff Garzik * @ofs: offset into identify device page 1218c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 1219c6fd2807SJeff Garzik * 1220c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 1221c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 1222c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 1223c6fd2807SJeff Garzik * 1224c6fd2807SJeff Garzik * LOCKING: 1225c6fd2807SJeff Garzik * caller. 1226c6fd2807SJeff Garzik */ 1227c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 1228c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 1229c6fd2807SJeff Garzik { 1230c6fd2807SJeff Garzik unsigned char *p; 1231c6fd2807SJeff Garzik 1232c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 1233c6fd2807SJeff Garzik 1234c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 1235c6fd2807SJeff Garzik 1236c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 1237c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 1238c6fd2807SJeff Garzik p--; 1239c6fd2807SJeff Garzik *p = '\0'; 1240c6fd2807SJeff Garzik } 1241c6fd2807SJeff Garzik 1242db6f8759STejun Heo static u64 ata_id_n_sectors(const u16 *id) 1243db6f8759STejun Heo { 1244db6f8759STejun Heo if (ata_id_has_lba(id)) { 1245db6f8759STejun Heo if (ata_id_has_lba48(id)) 1246db6f8759STejun Heo return ata_id_u64(id, 100); 1247db6f8759STejun Heo else 1248db6f8759STejun Heo return ata_id_u32(id, 60); 1249db6f8759STejun Heo } else { 1250db6f8759STejun Heo if (ata_id_current_chs_valid(id)) 1251db6f8759STejun Heo return ata_id_u32(id, 57); 1252db6f8759STejun Heo else 1253db6f8759STejun Heo return id[1] * id[3] * id[6]; 1254db6f8759STejun Heo } 1255db6f8759STejun Heo } 1256db6f8759STejun Heo 12571e999736SAlan Cox static u64 ata_tf_to_lba48(struct ata_taskfile *tf) 12581e999736SAlan Cox { 12591e999736SAlan Cox u64 sectors = 0; 12601e999736SAlan Cox 12611e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 12621e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 12631e999736SAlan Cox sectors |= (tf->hob_lbal & 0xff) << 24; 12641e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 12651e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 12661e999736SAlan Cox sectors |= (tf->lbal & 0xff); 12671e999736SAlan Cox 12681e999736SAlan Cox return ++sectors; 12691e999736SAlan Cox } 12701e999736SAlan Cox 12711e999736SAlan Cox static u64 ata_tf_to_lba(struct ata_taskfile *tf) 12721e999736SAlan Cox { 12731e999736SAlan Cox u64 sectors = 0; 12741e999736SAlan Cox 12751e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 12761e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 12771e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 12781e999736SAlan Cox sectors |= (tf->lbal & 0xff); 12791e999736SAlan Cox 12801e999736SAlan Cox return ++sectors; 12811e999736SAlan Cox } 12821e999736SAlan Cox 12831e999736SAlan Cox /** 1284c728a914STejun Heo * ata_read_native_max_address - Read native max address 1285c728a914STejun Heo * @dev: target device 1286c728a914STejun Heo * @max_sectors: out parameter for the result native max address 12871e999736SAlan Cox * 1288c728a914STejun Heo * Perform an LBA48 or LBA28 native size query upon the device in 1289c728a914STejun Heo * question. 1290c728a914STejun Heo * 1291c728a914STejun Heo * RETURNS: 1292c728a914STejun Heo * 0 on success, -EACCES if command is aborted by the drive. 1293c728a914STejun Heo * -EIO on other errors. 12941e999736SAlan Cox */ 1295c728a914STejun Heo static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 12961e999736SAlan Cox { 1297c728a914STejun Heo unsigned int err_mask; 12981e999736SAlan Cox struct ata_taskfile tf; 1299c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 13001e999736SAlan Cox 13011e999736SAlan Cox ata_tf_init(dev, &tf); 13021e999736SAlan Cox 1303c728a914STejun Heo /* always clear all address registers */ 13041e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1305c728a914STejun Heo 1306c728a914STejun Heo if (lba48) { 1307c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 1308c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 1309c728a914STejun Heo } else 1310c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX; 1311c728a914STejun Heo 13121e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 1313c728a914STejun Heo tf.device |= ATA_LBA; 13141e999736SAlan Cox 13152b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1316c728a914STejun Heo if (err_mask) { 1317c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to read native " 1318c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 1319c728a914STejun Heo if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 1320c728a914STejun Heo return -EACCES; 1321c728a914STejun Heo return -EIO; 1322c728a914STejun Heo } 1323c728a914STejun Heo 1324c728a914STejun Heo if (lba48) 1325c728a914STejun Heo *max_sectors = ata_tf_to_lba48(&tf); 1326c728a914STejun Heo else 1327c728a914STejun Heo *max_sectors = ata_tf_to_lba(&tf); 132893328e11SAlan Cox if (dev->horkage & ATA_HORKAGE_HPA_SIZE) 132993328e11SAlan Cox (*max_sectors)--; 13301e999736SAlan Cox return 0; 13311e999736SAlan Cox } 13321e999736SAlan Cox 13331e999736SAlan Cox /** 1334c728a914STejun Heo * ata_set_max_sectors - Set max sectors 1335c728a914STejun Heo * @dev: target device 13366b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 13371e999736SAlan Cox * 1338c728a914STejun Heo * Set max sectors of @dev to @new_sectors. 1339c728a914STejun Heo * 1340c728a914STejun Heo * RETURNS: 1341c728a914STejun Heo * 0 on success, -EACCES if command is aborted or denied (due to 1342c728a914STejun Heo * previous non-volatile SET_MAX) by the drive. -EIO on other 1343c728a914STejun Heo * errors. 13441e999736SAlan Cox */ 134505027adcSTejun Heo static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 13461e999736SAlan Cox { 1347c728a914STejun Heo unsigned int err_mask; 13481e999736SAlan Cox struct ata_taskfile tf; 1349c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 13501e999736SAlan Cox 13511e999736SAlan Cox new_sectors--; 13521e999736SAlan Cox 13531e999736SAlan Cox ata_tf_init(dev, &tf); 13541e999736SAlan Cox 1355c728a914STejun Heo tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 13561e999736SAlan Cox 1357c728a914STejun Heo if (lba48) { 1358c728a914STejun Heo tf.command = ATA_CMD_SET_MAX_EXT; 1359c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 13601e999736SAlan Cox 13611e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 13621e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 13631e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 13641e582ba4STejun Heo } else { 13651e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 1366c728a914STejun Heo 13671e582ba4STejun Heo tf.device |= (new_sectors >> 24) & 0xf; 13681e582ba4STejun Heo } 13691e582ba4STejun Heo 13701e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 1371c728a914STejun Heo tf.device |= ATA_LBA; 13721e999736SAlan Cox 13731e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 13741e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 13751e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 13761e999736SAlan Cox 13772b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1378c728a914STejun Heo if (err_mask) { 1379c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to set " 1380c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 1381c728a914STejun Heo if (err_mask == AC_ERR_DEV && 1382c728a914STejun Heo (tf.feature & (ATA_ABORTED | ATA_IDNF))) 1383c728a914STejun Heo return -EACCES; 1384c728a914STejun Heo return -EIO; 1385c728a914STejun Heo } 1386c728a914STejun Heo 13871e999736SAlan Cox return 0; 13881e999736SAlan Cox } 13891e999736SAlan Cox 13901e999736SAlan Cox /** 13911e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 13921e999736SAlan Cox * @dev: Device to resize 13931e999736SAlan Cox * 13941e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 13951e999736SAlan Cox * it if required to the full size of the media. The caller must check 13961e999736SAlan Cox * the drive has the HPA feature set enabled. 139705027adcSTejun Heo * 139805027adcSTejun Heo * RETURNS: 139905027adcSTejun Heo * 0 on success, -errno on failure. 14001e999736SAlan Cox */ 140105027adcSTejun Heo static int ata_hpa_resize(struct ata_device *dev) 14021e999736SAlan Cox { 140305027adcSTejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 140405027adcSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 140505027adcSTejun Heo u64 sectors = ata_id_n_sectors(dev->id); 140605027adcSTejun Heo u64 native_sectors; 1407c728a914STejun Heo int rc; 14081e999736SAlan Cox 140905027adcSTejun Heo /* do we need to do it? */ 141005027adcSTejun Heo if (dev->class != ATA_DEV_ATA || 141105027adcSTejun Heo !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 141205027adcSTejun Heo (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) 1413c728a914STejun Heo return 0; 14141e999736SAlan Cox 141505027adcSTejun Heo /* read native max address */ 141605027adcSTejun Heo rc = ata_read_native_max_address(dev, &native_sectors); 141705027adcSTejun Heo if (rc) { 141805027adcSTejun Heo /* If HPA isn't going to be unlocked, skip HPA 141905027adcSTejun Heo * resizing from the next try. 142005027adcSTejun Heo */ 142105027adcSTejun Heo if (!ata_ignore_hpa) { 142205027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "HPA support seems " 142305027adcSTejun Heo "broken, will skip HPA handling\n"); 142405027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 142505027adcSTejun Heo 142605027adcSTejun Heo /* we can continue if device aborted the command */ 142705027adcSTejun Heo if (rc == -EACCES) 142805027adcSTejun Heo rc = 0; 142905027adcSTejun Heo } 143005027adcSTejun Heo 143105027adcSTejun Heo return rc; 143205027adcSTejun Heo } 143305027adcSTejun Heo 143405027adcSTejun Heo /* nothing to do? */ 143505027adcSTejun Heo if (native_sectors <= sectors || !ata_ignore_hpa) { 143605027adcSTejun Heo if (!print_info || native_sectors == sectors) 143705027adcSTejun Heo return 0; 143805027adcSTejun Heo 143905027adcSTejun Heo if (native_sectors > sectors) 14401e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 144105027adcSTejun Heo "HPA detected: current %llu, native %llu\n", 144205027adcSTejun Heo (unsigned long long)sectors, 144305027adcSTejun Heo (unsigned long long)native_sectors); 144405027adcSTejun Heo else if (native_sectors < sectors) 144505027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, 144605027adcSTejun Heo "native sectors (%llu) is smaller than " 144705027adcSTejun Heo "sectors (%llu)\n", 144805027adcSTejun Heo (unsigned long long)native_sectors, 144905027adcSTejun Heo (unsigned long long)sectors); 145005027adcSTejun Heo return 0; 14511e999736SAlan Cox } 145237301a55STejun Heo 145305027adcSTejun Heo /* let's unlock HPA */ 145405027adcSTejun Heo rc = ata_set_max_sectors(dev, native_sectors); 145505027adcSTejun Heo if (rc == -EACCES) { 145605027adcSTejun Heo /* if device aborted the command, skip HPA resizing */ 145705027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "device aborted resize " 145805027adcSTejun Heo "(%llu -> %llu), skipping HPA handling\n", 145905027adcSTejun Heo (unsigned long long)sectors, 146005027adcSTejun Heo (unsigned long long)native_sectors); 146105027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 146205027adcSTejun Heo return 0; 146305027adcSTejun Heo } else if (rc) 146405027adcSTejun Heo return rc; 146505027adcSTejun Heo 146605027adcSTejun Heo /* re-read IDENTIFY data */ 146705027adcSTejun Heo rc = ata_dev_reread_id(dev, 0); 146805027adcSTejun Heo if (rc) { 146905027adcSTejun Heo ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " 147005027adcSTejun Heo "data after HPA resizing\n"); 147105027adcSTejun Heo return rc; 147205027adcSTejun Heo } 147305027adcSTejun Heo 147405027adcSTejun Heo if (print_info) { 147505027adcSTejun Heo u64 new_sectors = ata_id_n_sectors(dev->id); 147605027adcSTejun Heo ata_dev_printk(dev, KERN_INFO, 147705027adcSTejun Heo "HPA unlocked: %llu -> %llu, native %llu\n", 147805027adcSTejun Heo (unsigned long long)sectors, 147905027adcSTejun Heo (unsigned long long)new_sectors, 148005027adcSTejun Heo (unsigned long long)native_sectors); 148105027adcSTejun Heo } 148205027adcSTejun Heo 148305027adcSTejun Heo return 0; 14841e999736SAlan Cox } 14851e999736SAlan Cox 1486c6fd2807SJeff Garzik /** 1487c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 1488c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1489c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1490c6fd2807SJeff Garzik * 1491c6fd2807SJeff Garzik * This function performs no actual function. 1492c6fd2807SJeff Garzik * 1493c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1494c6fd2807SJeff Garzik * 1495c6fd2807SJeff Garzik * LOCKING: 1496c6fd2807SJeff Garzik * caller. 1497c6fd2807SJeff Garzik */ 1498c6fd2807SJeff Garzik void ata_noop_dev_select(struct ata_port *ap, unsigned int device) 1499c6fd2807SJeff Garzik { 1500c6fd2807SJeff Garzik } 1501c6fd2807SJeff Garzik 1502c6fd2807SJeff Garzik 1503c6fd2807SJeff Garzik /** 1504c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 1505c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1506c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1507c6fd2807SJeff Garzik * 1508c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1509c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1510c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 1511c6fd2807SJeff Garzik * 1512c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1513c6fd2807SJeff Garzik * 1514c6fd2807SJeff Garzik * LOCKING: 1515c6fd2807SJeff Garzik * caller. 1516c6fd2807SJeff Garzik */ 1517c6fd2807SJeff Garzik 1518c6fd2807SJeff Garzik void ata_std_dev_select(struct ata_port *ap, unsigned int device) 1519c6fd2807SJeff Garzik { 1520c6fd2807SJeff Garzik u8 tmp; 1521c6fd2807SJeff Garzik 1522c6fd2807SJeff Garzik if (device == 0) 1523c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 1524c6fd2807SJeff Garzik else 1525c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 1526c6fd2807SJeff Garzik 15270d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 1528c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 1529c6fd2807SJeff Garzik } 1530c6fd2807SJeff Garzik 1531c6fd2807SJeff Garzik /** 1532c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 1533c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1534c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1535c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 1536c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 1537c6fd2807SJeff Garzik * 1538c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1539c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1540c6fd2807SJeff Garzik * ATA channel. 1541c6fd2807SJeff Garzik * 1542c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 1543c6fd2807SJeff Garzik * which additionally provides the services of inserting 1544c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 1545c6fd2807SJeff Garzik * 1546c6fd2807SJeff Garzik * LOCKING: 1547c6fd2807SJeff Garzik * caller. 1548c6fd2807SJeff Garzik */ 1549c6fd2807SJeff Garzik 1550c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 1551c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 1552c6fd2807SJeff Garzik { 1553c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 155444877b4eSTejun Heo ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " 155544877b4eSTejun Heo "device %u, wait %u\n", device, wait); 1556c6fd2807SJeff Garzik 1557c6fd2807SJeff Garzik if (wait) 1558c6fd2807SJeff Garzik ata_wait_idle(ap); 1559c6fd2807SJeff Garzik 1560c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 1561c6fd2807SJeff Garzik 1562c6fd2807SJeff Garzik if (wait) { 15639af5c9c9STejun Heo if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) 1564c6fd2807SJeff Garzik msleep(150); 1565c6fd2807SJeff Garzik ata_wait_idle(ap); 1566c6fd2807SJeff Garzik } 1567c6fd2807SJeff Garzik } 1568c6fd2807SJeff Garzik 1569c6fd2807SJeff Garzik /** 1570c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1571c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1572c6fd2807SJeff Garzik * 1573c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1574c6fd2807SJeff Garzik * page. 1575c6fd2807SJeff Garzik * 1576c6fd2807SJeff Garzik * LOCKING: 1577c6fd2807SJeff Garzik * caller. 1578c6fd2807SJeff Garzik */ 1579c6fd2807SJeff Garzik 1580c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1581c6fd2807SJeff Garzik { 1582c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1583c6fd2807SJeff Garzik "53==0x%04x " 1584c6fd2807SJeff Garzik "63==0x%04x " 1585c6fd2807SJeff Garzik "64==0x%04x " 1586c6fd2807SJeff Garzik "75==0x%04x \n", 1587c6fd2807SJeff Garzik id[49], 1588c6fd2807SJeff Garzik id[53], 1589c6fd2807SJeff Garzik id[63], 1590c6fd2807SJeff Garzik id[64], 1591c6fd2807SJeff Garzik id[75]); 1592c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1593c6fd2807SJeff Garzik "81==0x%04x " 1594c6fd2807SJeff Garzik "82==0x%04x " 1595c6fd2807SJeff Garzik "83==0x%04x " 1596c6fd2807SJeff Garzik "84==0x%04x \n", 1597c6fd2807SJeff Garzik id[80], 1598c6fd2807SJeff Garzik id[81], 1599c6fd2807SJeff Garzik id[82], 1600c6fd2807SJeff Garzik id[83], 1601c6fd2807SJeff Garzik id[84]); 1602c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1603c6fd2807SJeff Garzik "93==0x%04x\n", 1604c6fd2807SJeff Garzik id[88], 1605c6fd2807SJeff Garzik id[93]); 1606c6fd2807SJeff Garzik } 1607c6fd2807SJeff Garzik 1608c6fd2807SJeff Garzik /** 1609c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1610c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1611c6fd2807SJeff Garzik * 1612c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1613c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1614c6fd2807SJeff Garzik * 1615c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1616c6fd2807SJeff Garzik * 1617c6fd2807SJeff Garzik * LOCKING: 1618c6fd2807SJeff Garzik * None. 1619c6fd2807SJeff Garzik * 1620c6fd2807SJeff Garzik * RETURNS: 1621c6fd2807SJeff Garzik * Computed xfermask 1622c6fd2807SJeff Garzik */ 16237dc951aeSTejun Heo unsigned long ata_id_xfermask(const u16 *id) 1624c6fd2807SJeff Garzik { 16257dc951aeSTejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 1626c6fd2807SJeff Garzik 1627c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1628c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1629c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1630c6fd2807SJeff Garzik pio_mask <<= 3; 1631c6fd2807SJeff Garzik pio_mask |= 0x7; 1632c6fd2807SJeff Garzik } else { 1633c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1634c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1635c6fd2807SJeff Garzik * a mask. 1636c6fd2807SJeff Garzik */ 16377a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 163846767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 163946767aebSAlan Cox pio_mask = (2 << mode) - 1; 164046767aebSAlan Cox else 164146767aebSAlan Cox pio_mask = 1; 1642c6fd2807SJeff Garzik 1643c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1644c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1645c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1646c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1647c6fd2807SJeff Garzik * will get this right anyway 1648c6fd2807SJeff Garzik */ 1649c6fd2807SJeff Garzik } 1650c6fd2807SJeff Garzik 1651c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1652c6fd2807SJeff Garzik 1653b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1654b352e57dSAlan Cox /* 1655b352e57dSAlan Cox * Process compact flash extended modes 1656b352e57dSAlan Cox */ 1657b352e57dSAlan Cox int pio = id[163] & 0x7; 1658b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1659b352e57dSAlan Cox 1660b352e57dSAlan Cox if (pio) 1661b352e57dSAlan Cox pio_mask |= (1 << 5); 1662b352e57dSAlan Cox if (pio > 1) 1663b352e57dSAlan Cox pio_mask |= (1 << 6); 1664b352e57dSAlan Cox if (dma) 1665b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1666b352e57dSAlan Cox if (dma > 1) 1667b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1668b352e57dSAlan Cox } 1669b352e57dSAlan Cox 1670c6fd2807SJeff Garzik udma_mask = 0; 1671c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1672c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1673c6fd2807SJeff Garzik 1674c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1675c6fd2807SJeff Garzik } 1676c6fd2807SJeff Garzik 1677c6fd2807SJeff Garzik /** 1678442eacc3SJeff Garzik * ata_pio_queue_task - Queue port_task 1679c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1680c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 168165f27f38SDavid Howells * @data: data for @fn to use 1682c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1683c6fd2807SJeff Garzik * 1684c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1685c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1686c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1687c6fd2807SJeff Garzik * one task is active at any given time. 1688c6fd2807SJeff Garzik * 1689c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1690442eacc3SJeff Garzik * port_task and EH. ata_pio_queue_task() may be ignored for EH 1691c6fd2807SJeff Garzik * synchronization. 1692c6fd2807SJeff Garzik * 1693c6fd2807SJeff Garzik * LOCKING: 1694c6fd2807SJeff Garzik * Inherited from caller. 1695c6fd2807SJeff Garzik */ 1696442eacc3SJeff Garzik static void ata_pio_queue_task(struct ata_port *ap, void *data, 1697c6fd2807SJeff Garzik unsigned long delay) 1698c6fd2807SJeff Garzik { 169965f27f38SDavid Howells ap->port_task_data = data; 1700c6fd2807SJeff Garzik 170145a66c1cSOleg Nesterov /* may fail if ata_port_flush_task() in progress */ 170245a66c1cSOleg Nesterov queue_delayed_work(ata_wq, &ap->port_task, delay); 1703c6fd2807SJeff Garzik } 1704c6fd2807SJeff Garzik 1705c6fd2807SJeff Garzik /** 1706c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1707c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1708c6fd2807SJeff Garzik * 1709c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1710c6fd2807SJeff Garzik * be running or scheduled. 1711c6fd2807SJeff Garzik * 1712c6fd2807SJeff Garzik * LOCKING: 1713c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1714c6fd2807SJeff Garzik */ 1715c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1716c6fd2807SJeff Garzik { 1717c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1718c6fd2807SJeff Garzik 171945a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->port_task); 1720c6fd2807SJeff Garzik 1721c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1722c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1723c6fd2807SJeff Garzik } 1724c6fd2807SJeff Garzik 17257102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1726c6fd2807SJeff Garzik { 1727c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1728c6fd2807SJeff Garzik 1729c6fd2807SJeff Garzik complete(waiting); 1730c6fd2807SJeff Garzik } 1731c6fd2807SJeff Garzik 1732c6fd2807SJeff Garzik /** 17332432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1734c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1735c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1736c6fd2807SJeff Garzik * @cdb: CDB for packet command 1737c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 17385c1ad8b3SRandy Dunlap * @sgl: sg list for the data buffer of the command 17392432697bSTejun Heo * @n_elem: Number of sg entries 17402b789108STejun Heo * @timeout: Timeout in msecs (0 for default) 1741c6fd2807SJeff Garzik * 1742c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1743c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1744c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1745c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1746c6fd2807SJeff Garzik * clean up after timeout. 1747c6fd2807SJeff Garzik * 1748c6fd2807SJeff Garzik * LOCKING: 1749c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1750c6fd2807SJeff Garzik * 1751c6fd2807SJeff Garzik * RETURNS: 1752c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1753c6fd2807SJeff Garzik */ 17542432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1755c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 175687260216SJens Axboe int dma_dir, struct scatterlist *sgl, 17572b789108STejun Heo unsigned int n_elem, unsigned long timeout) 1758c6fd2807SJeff Garzik { 17599af5c9c9STejun Heo struct ata_link *link = dev->link; 17609af5c9c9STejun Heo struct ata_port *ap = link->ap; 1761c6fd2807SJeff Garzik u8 command = tf->command; 1762c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1763c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1764c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1765da917d69STejun Heo int preempted_nr_active_links; 1766c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1767c6fd2807SJeff Garzik unsigned long flags; 1768c6fd2807SJeff Garzik unsigned int err_mask; 1769c6fd2807SJeff Garzik int rc; 1770c6fd2807SJeff Garzik 1771c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1772c6fd2807SJeff Garzik 1773c6fd2807SJeff Garzik /* no internal command while frozen */ 1774c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1775c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1776c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1777c6fd2807SJeff Garzik } 1778c6fd2807SJeff Garzik 1779c6fd2807SJeff Garzik /* initialize internal qc */ 1780c6fd2807SJeff Garzik 1781c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1782c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1783c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1784c6fd2807SJeff Garzik * EH stuff without converting to it. 1785c6fd2807SJeff Garzik */ 1786c6fd2807SJeff Garzik if (ap->ops->error_handler) 1787c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1788c6fd2807SJeff Garzik else 1789c6fd2807SJeff Garzik tag = 0; 1790c6fd2807SJeff Garzik 1791c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1792c6fd2807SJeff Garzik BUG(); 1793c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1794c6fd2807SJeff Garzik 1795c6fd2807SJeff Garzik qc->tag = tag; 1796c6fd2807SJeff Garzik qc->scsicmd = NULL; 1797c6fd2807SJeff Garzik qc->ap = ap; 1798c6fd2807SJeff Garzik qc->dev = dev; 1799c6fd2807SJeff Garzik ata_qc_reinit(qc); 1800c6fd2807SJeff Garzik 18019af5c9c9STejun Heo preempted_tag = link->active_tag; 18029af5c9c9STejun Heo preempted_sactive = link->sactive; 1803c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1804da917d69STejun Heo preempted_nr_active_links = ap->nr_active_links; 18059af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 18069af5c9c9STejun Heo link->sactive = 0; 1807c6fd2807SJeff Garzik ap->qc_active = 0; 1808da917d69STejun Heo ap->nr_active_links = 0; 1809c6fd2807SJeff Garzik 1810c6fd2807SJeff Garzik /* prepare & issue qc */ 1811c6fd2807SJeff Garzik qc->tf = *tf; 1812c6fd2807SJeff Garzik if (cdb) 1813c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1814c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1815c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1816c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 18172432697bSTejun Heo unsigned int i, buflen = 0; 181887260216SJens Axboe struct scatterlist *sg; 18192432697bSTejun Heo 182087260216SJens Axboe for_each_sg(sgl, sg, n_elem, i) 182187260216SJens Axboe buflen += sg->length; 18222432697bSTejun Heo 182387260216SJens Axboe ata_sg_init(qc, sgl, n_elem); 182449c80429SBrian King qc->nbytes = buflen; 1825c6fd2807SJeff Garzik } 1826c6fd2807SJeff Garzik 1827c6fd2807SJeff Garzik qc->private_data = &wait; 1828c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1829c6fd2807SJeff Garzik 1830c6fd2807SJeff Garzik ata_qc_issue(qc); 1831c6fd2807SJeff Garzik 1832c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1833c6fd2807SJeff Garzik 18342b789108STejun Heo if (!timeout) 18352b789108STejun Heo timeout = ata_probe_timeout * 1000 / HZ; 18362b789108STejun Heo 18372b789108STejun Heo rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1838c6fd2807SJeff Garzik 1839c6fd2807SJeff Garzik ata_port_flush_task(ap); 1840c6fd2807SJeff Garzik 1841c6fd2807SJeff Garzik if (!rc) { 1842c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1843c6fd2807SJeff Garzik 1844c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1845c6fd2807SJeff Garzik * following test prevents us from completing the qc 1846c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1847c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1848c6fd2807SJeff Garzik */ 1849c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1850c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1851c6fd2807SJeff Garzik 1852c6fd2807SJeff Garzik if (ap->ops->error_handler) 1853c6fd2807SJeff Garzik ata_port_freeze(ap); 1854c6fd2807SJeff Garzik else 1855c6fd2807SJeff Garzik ata_qc_complete(qc); 1856c6fd2807SJeff Garzik 1857c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1858c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1859c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1860c6fd2807SJeff Garzik } 1861c6fd2807SJeff Garzik 1862c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1863c6fd2807SJeff Garzik } 1864c6fd2807SJeff Garzik 1865c6fd2807SJeff Garzik /* do post_internal_cmd */ 1866c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1867c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1868c6fd2807SJeff Garzik 1869a51d644aSTejun Heo /* perform minimal error analysis */ 1870a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1871a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1872a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1873a51d644aSTejun Heo 1874a51d644aSTejun Heo if (!qc->err_mask) 1875c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1876a51d644aSTejun Heo 1877a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1878a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1879c6fd2807SJeff Garzik } 1880c6fd2807SJeff Garzik 1881c6fd2807SJeff Garzik /* finish up */ 1882c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1883c6fd2807SJeff Garzik 1884c6fd2807SJeff Garzik *tf = qc->result_tf; 1885c6fd2807SJeff Garzik err_mask = qc->err_mask; 1886c6fd2807SJeff Garzik 1887c6fd2807SJeff Garzik ata_qc_free(qc); 18889af5c9c9STejun Heo link->active_tag = preempted_tag; 18899af5c9c9STejun Heo link->sactive = preempted_sactive; 1890c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1891da917d69STejun Heo ap->nr_active_links = preempted_nr_active_links; 1892c6fd2807SJeff Garzik 1893c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1894c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1895c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1896c6fd2807SJeff Garzik * port. 1897c6fd2807SJeff Garzik * 1898c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1899c6fd2807SJeff Garzik * command failure results in disabling the device in the 1900c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1901c6fd2807SJeff Garzik * 1902c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1903c6fd2807SJeff Garzik */ 1904c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1905c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1906c6fd2807SJeff Garzik ata_port_probe(ap); 1907c6fd2807SJeff Garzik } 1908c6fd2807SJeff Garzik 1909c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1910c6fd2807SJeff Garzik 1911c6fd2807SJeff Garzik return err_mask; 1912c6fd2807SJeff Garzik } 1913c6fd2807SJeff Garzik 1914c6fd2807SJeff Garzik /** 191533480a0eSTejun Heo * ata_exec_internal - execute libata internal command 19162432697bSTejun Heo * @dev: Device to which the command is sent 19172432697bSTejun Heo * @tf: Taskfile registers for the command and the result 19182432697bSTejun Heo * @cdb: CDB for packet command 19192432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 19202432697bSTejun Heo * @buf: Data buffer of the command 19212432697bSTejun Heo * @buflen: Length of data buffer 19222b789108STejun Heo * @timeout: Timeout in msecs (0 for default) 19232432697bSTejun Heo * 19242432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 19252432697bSTejun Heo * buffer instead of sg list. 19262432697bSTejun Heo * 19272432697bSTejun Heo * LOCKING: 19282432697bSTejun Heo * None. Should be called with kernel context, might sleep. 19292432697bSTejun Heo * 19302432697bSTejun Heo * RETURNS: 19312432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 19322432697bSTejun Heo */ 19332432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 19342432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 19352b789108STejun Heo int dma_dir, void *buf, unsigned int buflen, 19362b789108STejun Heo unsigned long timeout) 19372432697bSTejun Heo { 193833480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 193933480a0eSTejun Heo unsigned int n_elem = 0; 19402432697bSTejun Heo 194133480a0eSTejun Heo if (dma_dir != DMA_NONE) { 194233480a0eSTejun Heo WARN_ON(!buf); 19432432697bSTejun Heo sg_init_one(&sg, buf, buflen); 194433480a0eSTejun Heo psg = &sg; 194533480a0eSTejun Heo n_elem++; 194633480a0eSTejun Heo } 19472432697bSTejun Heo 19482b789108STejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, 19492b789108STejun Heo timeout); 19502432697bSTejun Heo } 19512432697bSTejun Heo 19522432697bSTejun Heo /** 1953c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1954c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1955c6fd2807SJeff Garzik * @cmd: Opcode to execute 1956c6fd2807SJeff Garzik * 1957c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1958c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1959c6fd2807SJeff Garzik * 1960c6fd2807SJeff Garzik * LOCKING: 1961c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1962c6fd2807SJeff Garzik * 1963c6fd2807SJeff Garzik * RETURNS: 1964c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1965c6fd2807SJeff Garzik */ 1966c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1967c6fd2807SJeff Garzik { 1968c6fd2807SJeff Garzik struct ata_taskfile tf; 1969c6fd2807SJeff Garzik 1970c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1971c6fd2807SJeff Garzik 1972c6fd2807SJeff Garzik tf.command = cmd; 1973c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1974c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1975c6fd2807SJeff Garzik 19762b789108STejun Heo return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1977c6fd2807SJeff Garzik } 1978c6fd2807SJeff Garzik 1979c6fd2807SJeff Garzik /** 1980c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1981c6fd2807SJeff Garzik * @adev: ATA device 1982c6fd2807SJeff Garzik * 1983c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1984c6fd2807SJeff Garzik * by various controllers for chip configuration. 1985c6fd2807SJeff Garzik */ 1986c6fd2807SJeff Garzik 1987c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1988c6fd2807SJeff Garzik { 1989432729f0SAlan Cox /* Controller doesn't support IORDY. Probably a pointless check 1990432729f0SAlan Cox as the caller should know this */ 19919af5c9c9STejun Heo if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1992c6fd2807SJeff Garzik return 0; 1993432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1994432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1995c6fd2807SJeff Garzik return 1; 1996432729f0SAlan Cox /* We turn it on when possible */ 1997432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1998432729f0SAlan Cox return 1; 1999432729f0SAlan Cox return 0; 2000432729f0SAlan Cox } 2001c6fd2807SJeff Garzik 2002432729f0SAlan Cox /** 2003432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 2004432729f0SAlan Cox * @adev: ATA device 2005432729f0SAlan Cox * 2006432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 2007432729f0SAlan Cox * -1 if no iordy mode is available. 2008432729f0SAlan Cox */ 2009432729f0SAlan Cox 2010432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 2011432729f0SAlan Cox { 2012c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 2013c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 2014432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 2015c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 2016c6fd2807SJeff Garzik if (pio) { 2017c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 2018c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 2019432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 2020432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 2021c6fd2807SJeff Garzik } 2022c6fd2807SJeff Garzik } 2023432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 2024c6fd2807SJeff Garzik } 2025c6fd2807SJeff Garzik 2026c6fd2807SJeff Garzik /** 2027c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 2028c6fd2807SJeff Garzik * @dev: target device 2029c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 2030bff04647STejun Heo * @flags: ATA_READID_* flags 2031c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 2032c6fd2807SJeff Garzik * 2033c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 2034c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 2035c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 2036c6fd2807SJeff Garzik * for pre-ATA4 drives. 2037c6fd2807SJeff Garzik * 203850a99018SAlan Cox * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 203950a99018SAlan Cox * now we abort if we hit that case. 204050a99018SAlan Cox * 2041c6fd2807SJeff Garzik * LOCKING: 2042c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2043c6fd2807SJeff Garzik * 2044c6fd2807SJeff Garzik * RETURNS: 2045c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2046c6fd2807SJeff Garzik */ 2047c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 2048bff04647STejun Heo unsigned int flags, u16 *id) 2049c6fd2807SJeff Garzik { 20509af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 2051c6fd2807SJeff Garzik unsigned int class = *p_class; 2052c6fd2807SJeff Garzik struct ata_taskfile tf; 2053c6fd2807SJeff Garzik unsigned int err_mask = 0; 2054c6fd2807SJeff Garzik const char *reason; 205554936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 2056c6fd2807SJeff Garzik int rc; 2057c6fd2807SJeff Garzik 2058c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 205944877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 2060c6fd2807SJeff Garzik 2061c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 2062c6fd2807SJeff Garzik retry: 2063c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 2064c6fd2807SJeff Garzik 2065c6fd2807SJeff Garzik switch (class) { 2066c6fd2807SJeff Garzik case ATA_DEV_ATA: 2067c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 2068c6fd2807SJeff Garzik break; 2069c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 2070c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 2071c6fd2807SJeff Garzik break; 2072c6fd2807SJeff Garzik default: 2073c6fd2807SJeff Garzik rc = -ENODEV; 2074c6fd2807SJeff Garzik reason = "unsupported class"; 2075c6fd2807SJeff Garzik goto err_out; 2076c6fd2807SJeff Garzik } 2077c6fd2807SJeff Garzik 2078c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 207981afe893STejun Heo 208081afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 208181afe893STejun Heo * sure those are properly initialized. 208281afe893STejun Heo */ 208381afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 208481afe893STejun Heo 208581afe893STejun Heo /* Device presence detection is unreliable on some 208681afe893STejun Heo * controllers. Always poll IDENTIFY if available. 208781afe893STejun Heo */ 208881afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 2089c6fd2807SJeff Garzik 2090c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 20912b789108STejun Heo id, sizeof(id[0]) * ATA_ID_WORDS, 0); 2092c6fd2807SJeff Garzik if (err_mask) { 2093800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 209455a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 209544877b4eSTejun Heo ap->print_id, dev->devno); 209655a8e2c8STejun Heo return -ENOENT; 209755a8e2c8STejun Heo } 209855a8e2c8STejun Heo 209954936f8bSTejun Heo /* Device or controller might have reported the wrong 210054936f8bSTejun Heo * device class. Give a shot at the other IDENTIFY if 210154936f8bSTejun Heo * the current one is aborted by the device. 210254936f8bSTejun Heo */ 210354936f8bSTejun Heo if (may_fallback && 210454936f8bSTejun Heo (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 210554936f8bSTejun Heo may_fallback = 0; 210654936f8bSTejun Heo 210754936f8bSTejun Heo if (class == ATA_DEV_ATA) 210854936f8bSTejun Heo class = ATA_DEV_ATAPI; 210954936f8bSTejun Heo else 211054936f8bSTejun Heo class = ATA_DEV_ATA; 211154936f8bSTejun Heo goto retry; 211254936f8bSTejun Heo } 211354936f8bSTejun Heo 2114c6fd2807SJeff Garzik rc = -EIO; 2115c6fd2807SJeff Garzik reason = "I/O error"; 2116c6fd2807SJeff Garzik goto err_out; 2117c6fd2807SJeff Garzik } 2118c6fd2807SJeff Garzik 211954936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 212054936f8bSTejun Heo * successfully at least once. 212154936f8bSTejun Heo */ 212254936f8bSTejun Heo may_fallback = 0; 212354936f8bSTejun Heo 2124c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 2125c6fd2807SJeff Garzik 2126c6fd2807SJeff Garzik /* sanity check */ 2127c6fd2807SJeff Garzik rc = -EINVAL; 21286070068bSAlan Cox reason = "device reports invalid type"; 21294a3381feSJeff Garzik 21304a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 21314a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 21324a3381feSJeff Garzik goto err_out; 21334a3381feSJeff Garzik } else { 21344a3381feSJeff Garzik if (ata_id_is_ata(id)) 2135c6fd2807SJeff Garzik goto err_out; 2136c6fd2807SJeff Garzik } 2137c6fd2807SJeff Garzik 2138169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 2139169439c2SMark Lord tried_spinup = 1; 2140169439c2SMark Lord /* 2141169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 2142169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 2143169439c2SMark Lord * anything other than the original IDENTIFY command. 2144169439c2SMark Lord */ 2145218f3d30SJeff Garzik err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 2146fb0582f9SRyan Power if (err_mask && id[2] != 0x738c) { 2147169439c2SMark Lord rc = -EIO; 2148169439c2SMark Lord reason = "SPINUP failed"; 2149169439c2SMark Lord goto err_out; 2150169439c2SMark Lord } 2151169439c2SMark Lord /* 2152169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 2153169439c2SMark Lord * we now must reissue the IDENTIFY command. 2154169439c2SMark Lord */ 2155169439c2SMark Lord if (id[2] == 0x37c8) 2156169439c2SMark Lord goto retry; 2157169439c2SMark Lord } 2158169439c2SMark Lord 2159bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 2160c6fd2807SJeff Garzik /* 2161c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 2162c6fd2807SJeff Garzik * SRST RESET 216350a99018SAlan Cox * IDENTIFY (optional in early ATA) 216450a99018SAlan Cox * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 2165c6fd2807SJeff Garzik * anything else.. 2166c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 216750a99018SAlan Cox * 216850a99018SAlan Cox * Note that ATA4 says lba is mandatory so the second check 216950a99018SAlan Cox * shoud never trigger. 2170c6fd2807SJeff Garzik */ 2171c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 2172c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 2173c6fd2807SJeff Garzik if (err_mask) { 2174c6fd2807SJeff Garzik rc = -EIO; 2175c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 2176c6fd2807SJeff Garzik goto err_out; 2177c6fd2807SJeff Garzik } 2178c6fd2807SJeff Garzik 2179c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 2180c6fd2807SJeff Garzik * changed. reread the identify device info. 2181c6fd2807SJeff Garzik */ 2182bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 2183c6fd2807SJeff Garzik goto retry; 2184c6fd2807SJeff Garzik } 2185c6fd2807SJeff Garzik } 2186c6fd2807SJeff Garzik 2187c6fd2807SJeff Garzik *p_class = class; 2188c6fd2807SJeff Garzik 2189c6fd2807SJeff Garzik return 0; 2190c6fd2807SJeff Garzik 2191c6fd2807SJeff Garzik err_out: 2192c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2193c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 2194c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 2195c6fd2807SJeff Garzik return rc; 2196c6fd2807SJeff Garzik } 2197c6fd2807SJeff Garzik 2198c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 2199c6fd2807SJeff Garzik { 22009af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 22019af5c9c9STejun Heo return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2202c6fd2807SJeff Garzik } 2203c6fd2807SJeff Garzik 2204c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 2205c6fd2807SJeff Garzik char *desc, size_t desc_sz) 2206c6fd2807SJeff Garzik { 22079af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 2208c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2209c6fd2807SJeff Garzik 2210c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 2211c6fd2807SJeff Garzik desc[0] = '\0'; 2212c6fd2807SJeff Garzik return; 2213c6fd2807SJeff Garzik } 221475683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_NONCQ) { 22156919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 22166919a0a6SAlan Cox return; 22176919a0a6SAlan Cox } 2218c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 2219cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 2220c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 2221c6fd2807SJeff Garzik } 2222c6fd2807SJeff Garzik 2223c6fd2807SJeff Garzik if (hdepth >= ddepth) 2224c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 2225c6fd2807SJeff Garzik else 2226c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 2227c6fd2807SJeff Garzik } 2228c6fd2807SJeff Garzik 2229c6fd2807SJeff Garzik /** 2230c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 2231c6fd2807SJeff Garzik * @dev: Target device to configure 2232c6fd2807SJeff Garzik * 2233c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 2234c6fd2807SJeff Garzik * driver specific fixups are also applied. 2235c6fd2807SJeff Garzik * 2236c6fd2807SJeff Garzik * LOCKING: 2237c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2238c6fd2807SJeff Garzik * 2239c6fd2807SJeff Garzik * RETURNS: 2240c6fd2807SJeff Garzik * 0 on success, -errno otherwise 2241c6fd2807SJeff Garzik */ 2242efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 2243c6fd2807SJeff Garzik { 22449af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 22459af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 22466746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 2247c6fd2807SJeff Garzik const u16 *id = dev->id; 22487dc951aeSTejun Heo unsigned long xfer_mask; 2249b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 22503f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 22513f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 2252c6fd2807SJeff Garzik int rc; 2253c6fd2807SJeff Garzik 2254c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 225544877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 225644877b4eSTejun Heo __FUNCTION__); 2257c6fd2807SJeff Garzik return 0; 2258c6fd2807SJeff Garzik } 2259c6fd2807SJeff Garzik 2260c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 226144877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 2262c6fd2807SJeff Garzik 226375683fe7STejun Heo /* set horkage */ 226475683fe7STejun Heo dev->horkage |= ata_dev_blacklisted(dev); 226533267325STejun Heo ata_force_horkage(dev); 226675683fe7STejun Heo 22676746544cSTejun Heo /* let ACPI work its magic */ 22686746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 22696746544cSTejun Heo if (rc) 22706746544cSTejun Heo return rc; 227108573a86SKristen Carlson Accardi 227205027adcSTejun Heo /* massage HPA, do it early as it might change IDENTIFY data */ 227305027adcSTejun Heo rc = ata_hpa_resize(dev); 227405027adcSTejun Heo if (rc) 227505027adcSTejun Heo return rc; 227605027adcSTejun Heo 2277c6fd2807SJeff Garzik /* print device capabilities */ 2278c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2279c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2280c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 2281c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 2282c6fd2807SJeff Garzik __FUNCTION__, 2283c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 2284c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 2285c6fd2807SJeff Garzik 2286c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 2287c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 2288c6fd2807SJeff Garzik dev->max_sectors = 0; 2289c6fd2807SJeff Garzik dev->cdb_len = 0; 2290c6fd2807SJeff Garzik dev->n_sectors = 0; 2291c6fd2807SJeff Garzik dev->cylinders = 0; 2292c6fd2807SJeff Garzik dev->heads = 0; 2293c6fd2807SJeff Garzik dev->sectors = 0; 2294c6fd2807SJeff Garzik 2295c6fd2807SJeff Garzik /* 2296c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 2297c6fd2807SJeff Garzik */ 2298c6fd2807SJeff Garzik 2299c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 2300c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 2301c6fd2807SJeff Garzik 2302c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2303c6fd2807SJeff Garzik ata_dump_id(id); 2304c6fd2807SJeff Garzik 2305ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 2306ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 2307ef143d57SAlbert Lee sizeof(fwrevbuf)); 2308ef143d57SAlbert Lee 2309ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 2310ef143d57SAlbert Lee sizeof(modelbuf)); 2311ef143d57SAlbert Lee 2312c6fd2807SJeff Garzik /* ATA-specific feature tests */ 2313c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 2314b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 2315b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 231644877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 231744877b4eSTejun Heo "supports DRM functions and may " 231844877b4eSTejun Heo "not be fully accessable.\n"); 2319b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 2320ae8d4ee7SAlan Cox } else { 2321b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 2322ae8d4ee7SAlan Cox /* Warn the user if the device has TPM extensions */ 2323ae8d4ee7SAlan Cox if (ata_id_has_tpm(id)) 2324ae8d4ee7SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2325ae8d4ee7SAlan Cox "supports DRM functions and may " 2326ae8d4ee7SAlan Cox "not be fully accessable.\n"); 2327ae8d4ee7SAlan Cox } 2328b352e57dSAlan Cox 2329c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 2330c6fd2807SJeff Garzik 23313f64f565SEric D. Mudama if (dev->id[59] & 0x100) 23323f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 23333f64f565SEric D. Mudama 2334c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 2335c6fd2807SJeff Garzik const char *lba_desc; 2336c6fd2807SJeff Garzik char ncq_desc[20]; 2337c6fd2807SJeff Garzik 2338c6fd2807SJeff Garzik lba_desc = "LBA"; 2339c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 2340c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 2341c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 2342c6fd2807SJeff Garzik lba_desc = "LBA48"; 23436fc49adbSTejun Heo 23446fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 23456fc49adbSTejun Heo ata_id_has_flush_ext(id)) 23466fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 2347c6fd2807SJeff Garzik } 2348c6fd2807SJeff Garzik 2349c6fd2807SJeff Garzik /* config NCQ */ 2350c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2351c6fd2807SJeff Garzik 2352c6fd2807SJeff Garzik /* print device info to dmesg */ 23533f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 23543f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 23553f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 23563f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 23573f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 23583f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 23593f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 2360c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 23613f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 23623f64f565SEric D. Mudama } 2363c6fd2807SJeff Garzik } else { 2364c6fd2807SJeff Garzik /* CHS */ 2365c6fd2807SJeff Garzik 2366c6fd2807SJeff Garzik /* Default translation */ 2367c6fd2807SJeff Garzik dev->cylinders = id[1]; 2368c6fd2807SJeff Garzik dev->heads = id[3]; 2369c6fd2807SJeff Garzik dev->sectors = id[6]; 2370c6fd2807SJeff Garzik 2371c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 2372c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 2373c6fd2807SJeff Garzik dev->cylinders = id[54]; 2374c6fd2807SJeff Garzik dev->heads = id[55]; 2375c6fd2807SJeff Garzik dev->sectors = id[56]; 2376c6fd2807SJeff Garzik } 2377c6fd2807SJeff Garzik 2378c6fd2807SJeff Garzik /* print device info to dmesg */ 23793f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 2380c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 23813f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 23823f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 23833f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 23843f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 23853f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 23863f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 23873f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 23883f64f565SEric D. Mudama dev->heads, dev->sectors); 23893f64f565SEric D. Mudama } 2390c6fd2807SJeff Garzik } 2391c6fd2807SJeff Garzik 2392c6fd2807SJeff Garzik dev->cdb_len = 16; 2393c6fd2807SJeff Garzik } 2394c6fd2807SJeff Garzik 2395c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 2396c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 2397854c73a2STejun Heo const char *cdb_intr_string = ""; 2398854c73a2STejun Heo const char *atapi_an_string = ""; 239991163006STejun Heo const char *dma_dir_string = ""; 24007d77b247STejun Heo u32 sntf; 2401c6fd2807SJeff Garzik 2402c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 2403c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 2404c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2405c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 2406c6fd2807SJeff Garzik "unsupported CDB len\n"); 2407c6fd2807SJeff Garzik rc = -EINVAL; 2408c6fd2807SJeff Garzik goto err_out_nosup; 2409c6fd2807SJeff Garzik } 2410c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 2411c6fd2807SJeff Garzik 24127d77b247STejun Heo /* Enable ATAPI AN if both the host and device have 24137d77b247STejun Heo * the support. If PMP is attached, SNTF is required 24147d77b247STejun Heo * to enable ATAPI AN to discern between PHY status 24157d77b247STejun Heo * changed notifications and ATAPI ANs. 24169f45cbd3SKristen Carlson Accardi */ 24177d77b247STejun Heo if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 24187d77b247STejun Heo (!ap->nr_pmp_links || 24197d77b247STejun Heo sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 2420854c73a2STejun Heo unsigned int err_mask; 2421854c73a2STejun Heo 24229f45cbd3SKristen Carlson Accardi /* issue SET feature command to turn this on */ 2423218f3d30SJeff Garzik err_mask = ata_dev_set_feature(dev, 2424218f3d30SJeff Garzik SETFEATURES_SATA_ENABLE, SATA_AN); 2425854c73a2STejun Heo if (err_mask) 24269f45cbd3SKristen Carlson Accardi ata_dev_printk(dev, KERN_ERR, 2427854c73a2STejun Heo "failed to enable ATAPI AN " 2428854c73a2STejun Heo "(err_mask=0x%x)\n", err_mask); 2429854c73a2STejun Heo else { 24309f45cbd3SKristen Carlson Accardi dev->flags |= ATA_DFLAG_AN; 2431854c73a2STejun Heo atapi_an_string = ", ATAPI AN"; 2432854c73a2STejun Heo } 24339f45cbd3SKristen Carlson Accardi } 24349f45cbd3SKristen Carlson Accardi 2435c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 2436c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 2437c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 2438c6fd2807SJeff Garzik } 2439c6fd2807SJeff Garzik 244091163006STejun Heo if (atapi_dmadir || atapi_id_dmadir(dev->id)) { 244191163006STejun Heo dev->flags |= ATA_DFLAG_DMADIR; 244291163006STejun Heo dma_dir_string = ", DMADIR"; 244391163006STejun Heo } 244491163006STejun Heo 2445c6fd2807SJeff Garzik /* print device info to dmesg */ 2446c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2447ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 244891163006STejun Heo "ATAPI: %s, %s, max %s%s%s%s\n", 2449ef143d57SAlbert Lee modelbuf, fwrevbuf, 2450c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 245191163006STejun Heo cdb_intr_string, atapi_an_string, 245291163006STejun Heo dma_dir_string); 2453c6fd2807SJeff Garzik } 2454c6fd2807SJeff Garzik 2455914ed354STejun Heo /* determine max_sectors */ 2456914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 2457914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 2458914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 2459914ed354STejun Heo 2460ca77329fSKristen Carlson Accardi if (!(dev->horkage & ATA_HORKAGE_IPM)) { 2461ca77329fSKristen Carlson Accardi if (ata_id_has_hipm(dev->id)) 2462ca77329fSKristen Carlson Accardi dev->flags |= ATA_DFLAG_HIPM; 2463ca77329fSKristen Carlson Accardi if (ata_id_has_dipm(dev->id)) 2464ca77329fSKristen Carlson Accardi dev->flags |= ATA_DFLAG_DIPM; 2465ca77329fSKristen Carlson Accardi } 2466ca77329fSKristen Carlson Accardi 2467c5038fc0SAlan Cox /* Limit PATA drive on SATA cable bridge transfers to udma5, 2468c5038fc0SAlan Cox 200 sectors */ 2469c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2470c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2471c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2472c6fd2807SJeff Garzik "applying bridge limits\n"); 2473c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2474c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2475c6fd2807SJeff Garzik } 2476c6fd2807SJeff Garzik 2477f8d8e579STony Battersby if ((dev->class == ATA_DEV_ATAPI) && 2478f442cd86SAlbert Lee (atapi_command_packet_set(id) == TYPE_TAPE)) { 2479f8d8e579STony Battersby dev->max_sectors = ATA_MAX_SECTORS_TAPE; 2480f442cd86SAlbert Lee dev->horkage |= ATA_HORKAGE_STUCK_ERR; 2481f442cd86SAlbert Lee } 2482f8d8e579STony Battersby 248375683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 248403ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 248503ec52deSTejun Heo dev->max_sectors); 248618d6e9d5SAlbert Lee 2487ca77329fSKristen Carlson Accardi if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { 2488ca77329fSKristen Carlson Accardi dev->horkage |= ATA_HORKAGE_IPM; 2489ca77329fSKristen Carlson Accardi 2490ca77329fSKristen Carlson Accardi /* reset link pm_policy for this port to no pm */ 2491ca77329fSKristen Carlson Accardi ap->pm_policy = MAX_PERFORMANCE; 2492ca77329fSKristen Carlson Accardi } 2493ca77329fSKristen Carlson Accardi 2494c6fd2807SJeff Garzik if (ap->ops->dev_config) 2495cd0d3bbcSAlan ap->ops->dev_config(dev); 2496c6fd2807SJeff Garzik 2497c5038fc0SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 2498c5038fc0SAlan Cox /* Let the user know. We don't want to disallow opens for 2499c5038fc0SAlan Cox rescue purposes, or in case the vendor is just a blithering 2500c5038fc0SAlan Cox idiot. Do this after the dev_config call as some controllers 2501c5038fc0SAlan Cox with buggy firmware may want to avoid reporting false device 2502c5038fc0SAlan Cox bugs */ 2503c5038fc0SAlan Cox 2504c5038fc0SAlan Cox if (print_info) { 2505c5038fc0SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2506c5038fc0SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 2507c5038fc0SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2508c5038fc0SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 2509c5038fc0SAlan Cox } 2510c5038fc0SAlan Cox } 2511c5038fc0SAlan Cox 2512c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2513c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 2514c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 2515c6fd2807SJeff Garzik return 0; 2516c6fd2807SJeff Garzik 2517c6fd2807SJeff Garzik err_out_nosup: 2518c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2519c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2520c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 2521c6fd2807SJeff Garzik return rc; 2522c6fd2807SJeff Garzik } 2523c6fd2807SJeff Garzik 2524c6fd2807SJeff Garzik /** 25252e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2526be0d18dfSAlan Cox * @ap: port 2527be0d18dfSAlan Cox * 25282e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2529be0d18dfSAlan Cox * detection. 2530be0d18dfSAlan Cox */ 2531be0d18dfSAlan Cox 2532be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2533be0d18dfSAlan Cox { 2534be0d18dfSAlan Cox return ATA_CBL_PATA40; 2535be0d18dfSAlan Cox } 2536be0d18dfSAlan Cox 2537be0d18dfSAlan Cox /** 25382e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2539be0d18dfSAlan Cox * @ap: port 2540be0d18dfSAlan Cox * 25412e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2542be0d18dfSAlan Cox * detection. 2543be0d18dfSAlan Cox */ 2544be0d18dfSAlan Cox 2545be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2546be0d18dfSAlan Cox { 2547be0d18dfSAlan Cox return ATA_CBL_PATA80; 2548be0d18dfSAlan Cox } 2549be0d18dfSAlan Cox 2550be0d18dfSAlan Cox /** 2551be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2552be0d18dfSAlan Cox * @ap: port 2553be0d18dfSAlan Cox * 2554be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2555be0d18dfSAlan Cox */ 2556be0d18dfSAlan Cox 2557be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2558be0d18dfSAlan Cox { 2559be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2560be0d18dfSAlan Cox } 2561be0d18dfSAlan Cox 2562be0d18dfSAlan Cox /** 2563c88f90c3STejun Heo * ata_cable_ignore - return ignored PATA cable. 2564c88f90c3STejun Heo * @ap: port 2565c88f90c3STejun Heo * 2566c88f90c3STejun Heo * Helper method for drivers which don't use cable type to limit 2567c88f90c3STejun Heo * transfer mode. 2568c88f90c3STejun Heo */ 2569c88f90c3STejun Heo int ata_cable_ignore(struct ata_port *ap) 2570c88f90c3STejun Heo { 2571c88f90c3STejun Heo return ATA_CBL_PATA_IGN; 2572c88f90c3STejun Heo } 2573c88f90c3STejun Heo 2574c88f90c3STejun Heo /** 2575be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2576be0d18dfSAlan Cox * @ap: port 2577be0d18dfSAlan Cox * 2578be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2579be0d18dfSAlan Cox */ 2580be0d18dfSAlan Cox 2581be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2582be0d18dfSAlan Cox { 2583be0d18dfSAlan Cox return ATA_CBL_SATA; 2584be0d18dfSAlan Cox } 2585be0d18dfSAlan Cox 2586be0d18dfSAlan Cox /** 2587c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2588c6fd2807SJeff Garzik * @ap: Bus to probe 2589c6fd2807SJeff Garzik * 2590c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2591c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2592c6fd2807SJeff Garzik * the bus. 2593c6fd2807SJeff Garzik * 2594c6fd2807SJeff Garzik * LOCKING: 2595c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2596c6fd2807SJeff Garzik * 2597c6fd2807SJeff Garzik * RETURNS: 2598c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2599c6fd2807SJeff Garzik */ 2600c6fd2807SJeff Garzik 2601c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2602c6fd2807SJeff Garzik { 2603c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2604c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 2605f58229f8STejun Heo int rc; 2606c6fd2807SJeff Garzik struct ata_device *dev; 2607c6fd2807SJeff Garzik 2608c6fd2807SJeff Garzik ata_port_probe(ap); 2609c6fd2807SJeff Garzik 2610f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2611f58229f8STejun Heo tries[dev->devno] = ATA_PROBE_MAX_TRIES; 2612c6fd2807SJeff Garzik 2613c6fd2807SJeff Garzik retry: 2614cdeab114STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2615cdeab114STejun Heo /* If we issue an SRST then an ATA drive (not ATAPI) 2616cdeab114STejun Heo * may change configuration and be in PIO0 timing. If 2617cdeab114STejun Heo * we do a hard reset (or are coming from power on) 2618cdeab114STejun Heo * this is true for ATA or ATAPI. Until we've set a 2619cdeab114STejun Heo * suitable controller mode we should not touch the 2620cdeab114STejun Heo * bus as we may be talking too fast. 2621cdeab114STejun Heo */ 2622cdeab114STejun Heo dev->pio_mode = XFER_PIO_0; 2623cdeab114STejun Heo 2624cdeab114STejun Heo /* If the controller has a pio mode setup function 2625cdeab114STejun Heo * then use it to set the chipset to rights. Don't 2626cdeab114STejun Heo * touch the DMA setup as that will be dealt with when 2627cdeab114STejun Heo * configuring devices. 2628cdeab114STejun Heo */ 2629cdeab114STejun Heo if (ap->ops->set_piomode) 2630cdeab114STejun Heo ap->ops->set_piomode(ap, dev); 2631cdeab114STejun Heo } 2632cdeab114STejun Heo 2633c6fd2807SJeff Garzik /* reset and determine device classes */ 2634c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2635c6fd2807SJeff Garzik 2636f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2637c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 2638c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 2639c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2640c6fd2807SJeff Garzik else 2641c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2642c6fd2807SJeff Garzik 2643c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2644c6fd2807SJeff Garzik } 2645c6fd2807SJeff Garzik 2646c6fd2807SJeff Garzik ata_port_probe(ap); 2647c6fd2807SJeff Garzik 2648f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2649f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2650f31f0cc2SJeff Garzik the slave device */ 2651f31f0cc2SJeff Garzik 2652f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2653f58229f8STejun Heo if (tries[dev->devno]) 2654f58229f8STejun Heo dev->class = classes[dev->devno]; 2655c6fd2807SJeff Garzik 2656c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2657c6fd2807SJeff Garzik continue; 2658c6fd2807SJeff Garzik 2659bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2660bff04647STejun Heo dev->id); 2661c6fd2807SJeff Garzik if (rc) 2662c6fd2807SJeff Garzik goto fail; 2663f31f0cc2SJeff Garzik } 2664f31f0cc2SJeff Garzik 2665be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2666be0d18dfSAlan Cox if (ap->ops->cable_detect) 2667be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2668be0d18dfSAlan Cox 2669614fe29bSAlan Cox /* We may have SATA bridge glue hiding here irrespective of the 2670614fe29bSAlan Cox reported cable types and sensed types */ 2671614fe29bSAlan Cox ata_link_for_each_dev(dev, &ap->link) { 2672614fe29bSAlan Cox if (!ata_dev_enabled(dev)) 2673614fe29bSAlan Cox continue; 2674614fe29bSAlan Cox /* SATA drives indicate we have a bridge. We don't know which 2675614fe29bSAlan Cox end of the link the bridge is which is a problem */ 2676614fe29bSAlan Cox if (ata_id_is_sata(dev->id)) 2677614fe29bSAlan Cox ap->cbl = ATA_CBL_SATA; 2678614fe29bSAlan Cox } 2679614fe29bSAlan Cox 2680f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2681f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2682f31f0cc2SJeff Garzik 2683f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2684f31f0cc2SJeff Garzik if (!ata_dev_enabled(dev)) 2685f31f0cc2SJeff Garzik continue; 2686c6fd2807SJeff Garzik 26879af5c9c9STejun Heo ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; 2688efdaedc4STejun Heo rc = ata_dev_configure(dev); 26899af5c9c9STejun Heo ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2690c6fd2807SJeff Garzik if (rc) 2691c6fd2807SJeff Garzik goto fail; 2692c6fd2807SJeff Garzik } 2693c6fd2807SJeff Garzik 2694c6fd2807SJeff Garzik /* configure transfer mode */ 26950260731fSTejun Heo rc = ata_set_mode(&ap->link, &dev); 26964ae72a1eSTejun Heo if (rc) 2697c6fd2807SJeff Garzik goto fail; 2698c6fd2807SJeff Garzik 2699f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2700f58229f8STejun Heo if (ata_dev_enabled(dev)) 2701c6fd2807SJeff Garzik return 0; 2702c6fd2807SJeff Garzik 2703c6fd2807SJeff Garzik /* no device present, disable port */ 2704c6fd2807SJeff Garzik ata_port_disable(ap); 2705c6fd2807SJeff Garzik return -ENODEV; 2706c6fd2807SJeff Garzik 2707c6fd2807SJeff Garzik fail: 27084ae72a1eSTejun Heo tries[dev->devno]--; 27094ae72a1eSTejun Heo 2710c6fd2807SJeff Garzik switch (rc) { 2711c6fd2807SJeff Garzik case -EINVAL: 27124ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2713c6fd2807SJeff Garzik tries[dev->devno] = 0; 2714c6fd2807SJeff Garzik break; 27154ae72a1eSTejun Heo 27164ae72a1eSTejun Heo case -ENODEV: 27174ae72a1eSTejun Heo /* give it just one more chance */ 27184ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2719c6fd2807SJeff Garzik case -EIO: 27204ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 27214ae72a1eSTejun Heo /* This is the last chance, better to slow 27224ae72a1eSTejun Heo * down than lose it. 27234ae72a1eSTejun Heo */ 2724936fd732STejun Heo sata_down_spd_limit(&ap->link); 27254ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 27264ae72a1eSTejun Heo } 2727c6fd2807SJeff Garzik } 2728c6fd2807SJeff Garzik 27294ae72a1eSTejun Heo if (!tries[dev->devno]) 2730c6fd2807SJeff Garzik ata_dev_disable(dev); 2731c6fd2807SJeff Garzik 2732c6fd2807SJeff Garzik goto retry; 2733c6fd2807SJeff Garzik } 2734c6fd2807SJeff Garzik 2735c6fd2807SJeff Garzik /** 2736c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 2737c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 2738c6fd2807SJeff Garzik * 2739c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2740c6fd2807SJeff Garzik * thinks that the entire port is enabled. 2741c6fd2807SJeff Garzik * 2742cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2743c6fd2807SJeff Garzik * serialization. 2744c6fd2807SJeff Garzik */ 2745c6fd2807SJeff Garzik 2746c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 2747c6fd2807SJeff Garzik { 2748c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 2749c6fd2807SJeff Garzik } 2750c6fd2807SJeff Garzik 2751c6fd2807SJeff Garzik /** 2752c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2753936fd732STejun Heo * @link: SATA link to printk link status about 2754c6fd2807SJeff Garzik * 2755c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2756c6fd2807SJeff Garzik * 2757c6fd2807SJeff Garzik * LOCKING: 2758c6fd2807SJeff Garzik * None. 2759c6fd2807SJeff Garzik */ 2760936fd732STejun Heo void sata_print_link_status(struct ata_link *link) 2761c6fd2807SJeff Garzik { 2762c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2763c6fd2807SJeff Garzik 2764936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus)) 2765c6fd2807SJeff Garzik return; 2766936fd732STejun Heo sata_scr_read(link, SCR_CONTROL, &scontrol); 2767c6fd2807SJeff Garzik 2768936fd732STejun Heo if (ata_link_online(link)) { 2769c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2770936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2771c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2772c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2773c6fd2807SJeff Garzik } else { 2774936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2775c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2776c6fd2807SJeff Garzik sstatus, scontrol); 2777c6fd2807SJeff Garzik } 2778c6fd2807SJeff Garzik } 2779c6fd2807SJeff Garzik 2780c6fd2807SJeff Garzik /** 2781c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2782c6fd2807SJeff Garzik * @adev: device 2783c6fd2807SJeff Garzik * 2784c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2785c6fd2807SJeff Garzik * present NULL is returned 2786c6fd2807SJeff Garzik */ 2787c6fd2807SJeff Garzik 2788c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2789c6fd2807SJeff Garzik { 27909af5c9c9STejun Heo struct ata_link *link = adev->link; 27919af5c9c9STejun Heo struct ata_device *pair = &link->device[1 - adev->devno]; 2792c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2793c6fd2807SJeff Garzik return NULL; 2794c6fd2807SJeff Garzik return pair; 2795c6fd2807SJeff Garzik } 2796c6fd2807SJeff Garzik 2797c6fd2807SJeff Garzik /** 2798c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2799c6fd2807SJeff Garzik * @ap: Port to be disabled. 2800c6fd2807SJeff Garzik * 2801c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2802c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2803c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2804c6fd2807SJeff Garzik * on this port. 2805c6fd2807SJeff Garzik * 2806cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2807c6fd2807SJeff Garzik * serialization. 2808c6fd2807SJeff Garzik */ 2809c6fd2807SJeff Garzik 2810c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2811c6fd2807SJeff Garzik { 28129af5c9c9STejun Heo ap->link.device[0].class = ATA_DEV_NONE; 28139af5c9c9STejun Heo ap->link.device[1].class = ATA_DEV_NONE; 2814c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2815c6fd2807SJeff Garzik } 2816c6fd2807SJeff Garzik 2817c6fd2807SJeff Garzik /** 2818c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2819936fd732STejun Heo * @link: Link to adjust SATA spd limit for 2820c6fd2807SJeff Garzik * 2821936fd732STejun Heo * Adjust SATA spd limit of @link downward. Note that this 2822c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2823c6fd2807SJeff Garzik * using sata_set_spd(). 2824c6fd2807SJeff Garzik * 2825c6fd2807SJeff Garzik * LOCKING: 2826c6fd2807SJeff Garzik * Inherited from caller. 2827c6fd2807SJeff Garzik * 2828c6fd2807SJeff Garzik * RETURNS: 2829c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2830c6fd2807SJeff Garzik */ 2831936fd732STejun Heo int sata_down_spd_limit(struct ata_link *link) 2832c6fd2807SJeff Garzik { 2833c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2834c6fd2807SJeff Garzik int rc, highbit; 2835c6fd2807SJeff Garzik 2836936fd732STejun Heo if (!sata_scr_valid(link)) 2837008a7896STejun Heo return -EOPNOTSUPP; 2838008a7896STejun Heo 2839008a7896STejun Heo /* If SCR can be read, use it to determine the current SPD. 2840936fd732STejun Heo * If not, use cached value in link->sata_spd. 2841008a7896STejun Heo */ 2842936fd732STejun Heo rc = sata_scr_read(link, SCR_STATUS, &sstatus); 2843008a7896STejun Heo if (rc == 0) 2844008a7896STejun Heo spd = (sstatus >> 4) & 0xf; 2845008a7896STejun Heo else 2846936fd732STejun Heo spd = link->sata_spd; 2847c6fd2807SJeff Garzik 2848936fd732STejun Heo mask = link->sata_spd_limit; 2849c6fd2807SJeff Garzik if (mask <= 1) 2850c6fd2807SJeff Garzik return -EINVAL; 2851008a7896STejun Heo 2852008a7896STejun Heo /* unconditionally mask off the highest bit */ 2853c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2854c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2855c6fd2807SJeff Garzik 2856008a7896STejun Heo /* Mask off all speeds higher than or equal to the current 2857008a7896STejun Heo * one. Force 1.5Gbps if current SPD is not available. 2858008a7896STejun Heo */ 2859008a7896STejun Heo if (spd > 1) 2860008a7896STejun Heo mask &= (1 << (spd - 1)) - 1; 2861008a7896STejun Heo else 2862008a7896STejun Heo mask &= 1; 2863008a7896STejun Heo 2864008a7896STejun Heo /* were we already at the bottom? */ 2865c6fd2807SJeff Garzik if (!mask) 2866c6fd2807SJeff Garzik return -EINVAL; 2867c6fd2807SJeff Garzik 2868936fd732STejun Heo link->sata_spd_limit = mask; 2869c6fd2807SJeff Garzik 2870936fd732STejun Heo ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", 2871c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2872c6fd2807SJeff Garzik 2873c6fd2807SJeff Garzik return 0; 2874c6fd2807SJeff Garzik } 2875c6fd2807SJeff Garzik 2876936fd732STejun Heo static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) 2877c6fd2807SJeff Garzik { 28785270222fSTejun Heo struct ata_link *host_link = &link->ap->link; 28795270222fSTejun Heo u32 limit, target, spd; 2880c6fd2807SJeff Garzik 28815270222fSTejun Heo limit = link->sata_spd_limit; 28825270222fSTejun Heo 28835270222fSTejun Heo /* Don't configure downstream link faster than upstream link. 28845270222fSTejun Heo * It doesn't speed up anything and some PMPs choke on such 28855270222fSTejun Heo * configuration. 28865270222fSTejun Heo */ 28875270222fSTejun Heo if (!ata_is_host_link(link) && host_link->sata_spd) 28885270222fSTejun Heo limit &= (1 << host_link->sata_spd) - 1; 28895270222fSTejun Heo 28905270222fSTejun Heo if (limit == UINT_MAX) 28915270222fSTejun Heo target = 0; 2892c6fd2807SJeff Garzik else 28935270222fSTejun Heo target = fls(limit); 2894c6fd2807SJeff Garzik 2895c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 28965270222fSTejun Heo *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); 2897c6fd2807SJeff Garzik 28985270222fSTejun Heo return spd != target; 2899c6fd2807SJeff Garzik } 2900c6fd2807SJeff Garzik 2901c6fd2807SJeff Garzik /** 2902c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2903936fd732STejun Heo * @link: Link in question 2904c6fd2807SJeff Garzik * 2905c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2906936fd732STejun Heo * @link->sata_spd_limit. This function is used to determine 2907c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2908c6fd2807SJeff Garzik * configuration. 2909c6fd2807SJeff Garzik * 2910c6fd2807SJeff Garzik * LOCKING: 2911c6fd2807SJeff Garzik * Inherited from caller. 2912c6fd2807SJeff Garzik * 2913c6fd2807SJeff Garzik * RETURNS: 2914c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2915c6fd2807SJeff Garzik */ 2916936fd732STejun Heo int sata_set_spd_needed(struct ata_link *link) 2917c6fd2807SJeff Garzik { 2918c6fd2807SJeff Garzik u32 scontrol; 2919c6fd2807SJeff Garzik 2920936fd732STejun Heo if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 2921db64bcf3STejun Heo return 1; 2922c6fd2807SJeff Garzik 2923936fd732STejun Heo return __sata_set_spd_needed(link, &scontrol); 2924c6fd2807SJeff Garzik } 2925c6fd2807SJeff Garzik 2926c6fd2807SJeff Garzik /** 2927c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2928936fd732STejun Heo * @link: Link to set SATA spd for 2929c6fd2807SJeff Garzik * 2930936fd732STejun Heo * Set SATA spd of @link according to sata_spd_limit. 2931c6fd2807SJeff Garzik * 2932c6fd2807SJeff Garzik * LOCKING: 2933c6fd2807SJeff Garzik * Inherited from caller. 2934c6fd2807SJeff Garzik * 2935c6fd2807SJeff Garzik * RETURNS: 2936c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2937c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2938c6fd2807SJeff Garzik */ 2939936fd732STejun Heo int sata_set_spd(struct ata_link *link) 2940c6fd2807SJeff Garzik { 2941c6fd2807SJeff Garzik u32 scontrol; 2942c6fd2807SJeff Garzik int rc; 2943c6fd2807SJeff Garzik 2944936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 2945c6fd2807SJeff Garzik return rc; 2946c6fd2807SJeff Garzik 2947936fd732STejun Heo if (!__sata_set_spd_needed(link, &scontrol)) 2948c6fd2807SJeff Garzik return 0; 2949c6fd2807SJeff Garzik 2950936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 2951c6fd2807SJeff Garzik return rc; 2952c6fd2807SJeff Garzik 2953c6fd2807SJeff Garzik return 1; 2954c6fd2807SJeff Garzik } 2955c6fd2807SJeff Garzik 2956c6fd2807SJeff Garzik /* 2957c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2958c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2959c6fd2807SJeff Garzik */ 2960c6fd2807SJeff Garzik /* 2961b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2962c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2963b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2964b352e57dSAlan Cox * 2965b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2966c6fd2807SJeff Garzik */ 2967c6fd2807SJeff Garzik 2968c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 296970cd071eSTejun Heo /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 297070cd071eSTejun Heo { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 297170cd071eSTejun Heo { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 297270cd071eSTejun Heo { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 297370cd071eSTejun Heo { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 297470cd071eSTejun Heo { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 297570cd071eSTejun Heo { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 297670cd071eSTejun Heo { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2977c6fd2807SJeff Garzik 297870cd071eSTejun Heo { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 297970cd071eSTejun Heo { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 298070cd071eSTejun Heo { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2981c6fd2807SJeff Garzik 298270cd071eSTejun Heo { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 298370cd071eSTejun Heo { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 298470cd071eSTejun Heo { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2985b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 298670cd071eSTejun Heo { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2987c6fd2807SJeff Garzik 2988c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 298970cd071eSTejun Heo { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 299070cd071eSTejun Heo { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 299170cd071eSTejun Heo { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 299270cd071eSTejun Heo { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 299370cd071eSTejun Heo { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 299470cd071eSTejun Heo { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 299570cd071eSTejun Heo { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2996c6fd2807SJeff Garzik 2997c6fd2807SJeff Garzik { 0xFF } 2998c6fd2807SJeff Garzik }; 2999c6fd2807SJeff Garzik 3000c6fd2807SJeff Garzik #define ENOUGH(v, unit) (((v)-1)/(unit)+1) 3001c6fd2807SJeff Garzik #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) 3002c6fd2807SJeff Garzik 3003c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 3004c6fd2807SJeff Garzik { 3005c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 3006c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 3007c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 3008c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 3009c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 3010c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 3011c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 3012c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 3013c6fd2807SJeff Garzik } 3014c6fd2807SJeff Garzik 3015c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 3016c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 3017c6fd2807SJeff Garzik { 3018c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 3019c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 3020c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 3021c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 3022c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 3023c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 3024c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 3025c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 3026c6fd2807SJeff Garzik } 3027c6fd2807SJeff Garzik 30286357357cSTejun Heo const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) 3029c6fd2807SJeff Garzik { 303070cd071eSTejun Heo const struct ata_timing *t = ata_timing; 3031c6fd2807SJeff Garzik 303270cd071eSTejun Heo while (xfer_mode > t->mode) 303370cd071eSTejun Heo t++; 303470cd071eSTejun Heo 303570cd071eSTejun Heo if (xfer_mode == t->mode) 3036c6fd2807SJeff Garzik return t; 303770cd071eSTejun Heo return NULL; 3038c6fd2807SJeff Garzik } 3039c6fd2807SJeff Garzik 3040c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 3041c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 3042c6fd2807SJeff Garzik { 3043c6fd2807SJeff Garzik const struct ata_timing *s; 3044c6fd2807SJeff Garzik struct ata_timing p; 3045c6fd2807SJeff Garzik 3046c6fd2807SJeff Garzik /* 3047c6fd2807SJeff Garzik * Find the mode. 3048c6fd2807SJeff Garzik */ 3049c6fd2807SJeff Garzik 3050c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 3051c6fd2807SJeff Garzik return -EINVAL; 3052c6fd2807SJeff Garzik 3053c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 3054c6fd2807SJeff Garzik 3055c6fd2807SJeff Garzik /* 3056c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 3057c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 3058c6fd2807SJeff Garzik */ 3059c6fd2807SJeff Garzik 3060c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 3061c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 3062c6fd2807SJeff Garzik if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 3063c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 3064c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 3065c6fd2807SJeff Garzik } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 3066c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 3067c6fd2807SJeff Garzik } 3068c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 3069c6fd2807SJeff Garzik } 3070c6fd2807SJeff Garzik 3071c6fd2807SJeff Garzik /* 3072c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 3073c6fd2807SJeff Garzik */ 3074c6fd2807SJeff Garzik 3075c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 3076c6fd2807SJeff Garzik 3077c6fd2807SJeff Garzik /* 3078c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 3079c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 3080c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 3081c6fd2807SJeff Garzik */ 3082c6fd2807SJeff Garzik 3083fd3367afSAlan if (speed > XFER_PIO_6) { 3084c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 3085c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 3086c6fd2807SJeff Garzik } 3087c6fd2807SJeff Garzik 3088c6fd2807SJeff Garzik /* 3089c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 3090c6fd2807SJeff Garzik */ 3091c6fd2807SJeff Garzik 3092c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 3093c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 3094c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 3095c6fd2807SJeff Garzik } 3096c6fd2807SJeff Garzik 3097c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 3098c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 3099c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 3100c6fd2807SJeff Garzik } 31014f701d1eSAlan Cox 31024f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 31034f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 31044f701d1eSAlan Cox if so we must correct this */ 31054f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 31064f701d1eSAlan Cox t->cycle = t->active + t->recover; 3107c6fd2807SJeff Garzik 3108c6fd2807SJeff Garzik return 0; 3109c6fd2807SJeff Garzik } 3110c6fd2807SJeff Garzik 3111c6fd2807SJeff Garzik /** 3112a0f79b92STejun Heo * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3113a0f79b92STejun Heo * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3114a0f79b92STejun Heo * @cycle: cycle duration in ns 3115a0f79b92STejun Heo * 3116a0f79b92STejun Heo * Return matching xfer mode for @cycle. The returned mode is of 3117a0f79b92STejun Heo * the transfer type specified by @xfer_shift. If @cycle is too 3118a0f79b92STejun Heo * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3119a0f79b92STejun Heo * than the fastest known mode, the fasted mode is returned. 3120a0f79b92STejun Heo * 3121a0f79b92STejun Heo * LOCKING: 3122a0f79b92STejun Heo * None. 3123a0f79b92STejun Heo * 3124a0f79b92STejun Heo * RETURNS: 3125a0f79b92STejun Heo * Matching xfer_mode, 0xff if no match found. 3126a0f79b92STejun Heo */ 3127a0f79b92STejun Heo u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3128a0f79b92STejun Heo { 3129a0f79b92STejun Heo u8 base_mode = 0xff, last_mode = 0xff; 3130a0f79b92STejun Heo const struct ata_xfer_ent *ent; 3131a0f79b92STejun Heo const struct ata_timing *t; 3132a0f79b92STejun Heo 3133a0f79b92STejun Heo for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3134a0f79b92STejun Heo if (ent->shift == xfer_shift) 3135a0f79b92STejun Heo base_mode = ent->base; 3136a0f79b92STejun Heo 3137a0f79b92STejun Heo for (t = ata_timing_find_mode(base_mode); 3138a0f79b92STejun Heo t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3139a0f79b92STejun Heo unsigned short this_cycle; 3140a0f79b92STejun Heo 3141a0f79b92STejun Heo switch (xfer_shift) { 3142a0f79b92STejun Heo case ATA_SHIFT_PIO: 3143a0f79b92STejun Heo case ATA_SHIFT_MWDMA: 3144a0f79b92STejun Heo this_cycle = t->cycle; 3145a0f79b92STejun Heo break; 3146a0f79b92STejun Heo case ATA_SHIFT_UDMA: 3147a0f79b92STejun Heo this_cycle = t->udma; 3148a0f79b92STejun Heo break; 3149a0f79b92STejun Heo default: 3150a0f79b92STejun Heo return 0xff; 3151a0f79b92STejun Heo } 3152a0f79b92STejun Heo 3153a0f79b92STejun Heo if (cycle > this_cycle) 3154a0f79b92STejun Heo break; 3155a0f79b92STejun Heo 3156a0f79b92STejun Heo last_mode = t->mode; 3157a0f79b92STejun Heo } 3158a0f79b92STejun Heo 3159a0f79b92STejun Heo return last_mode; 3160a0f79b92STejun Heo } 3161a0f79b92STejun Heo 3162a0f79b92STejun Heo /** 3163c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 3164c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 3165458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 3166c6fd2807SJeff Garzik * 3167c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 3168c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 3169c6fd2807SJeff Garzik * will apply the limit. 3170c6fd2807SJeff Garzik * 3171c6fd2807SJeff Garzik * LOCKING: 3172c6fd2807SJeff Garzik * Inherited from caller. 3173c6fd2807SJeff Garzik * 3174c6fd2807SJeff Garzik * RETURNS: 3175c6fd2807SJeff Garzik * 0 on success, negative errno on failure 3176c6fd2807SJeff Garzik */ 3177458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3178c6fd2807SJeff Garzik { 3179458337dbSTejun Heo char buf[32]; 31807dc951aeSTejun Heo unsigned long orig_mask, xfer_mask; 31817dc951aeSTejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 3182458337dbSTejun Heo int quiet, highbit; 3183c6fd2807SJeff Garzik 3184458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 3185458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 3186458337dbSTejun Heo 3187458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3188458337dbSTejun Heo dev->mwdma_mask, 3189c6fd2807SJeff Garzik dev->udma_mask); 3190458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3191c6fd2807SJeff Garzik 3192458337dbSTejun Heo switch (sel) { 3193458337dbSTejun Heo case ATA_DNXFER_PIO: 3194458337dbSTejun Heo highbit = fls(pio_mask) - 1; 3195458337dbSTejun Heo pio_mask &= ~(1 << highbit); 3196458337dbSTejun Heo break; 3197458337dbSTejun Heo 3198458337dbSTejun Heo case ATA_DNXFER_DMA: 3199458337dbSTejun Heo if (udma_mask) { 3200458337dbSTejun Heo highbit = fls(udma_mask) - 1; 3201458337dbSTejun Heo udma_mask &= ~(1 << highbit); 3202458337dbSTejun Heo if (!udma_mask) 3203458337dbSTejun Heo return -ENOENT; 3204458337dbSTejun Heo } else if (mwdma_mask) { 3205458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 3206458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 3207458337dbSTejun Heo if (!mwdma_mask) 3208458337dbSTejun Heo return -ENOENT; 3209458337dbSTejun Heo } 3210458337dbSTejun Heo break; 3211458337dbSTejun Heo 3212458337dbSTejun Heo case ATA_DNXFER_40C: 3213458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 3214458337dbSTejun Heo break; 3215458337dbSTejun Heo 3216458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 3217458337dbSTejun Heo pio_mask &= 1; 3218458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 3219458337dbSTejun Heo mwdma_mask = 0; 3220458337dbSTejun Heo udma_mask = 0; 3221458337dbSTejun Heo break; 3222458337dbSTejun Heo 3223458337dbSTejun Heo default: 3224458337dbSTejun Heo BUG(); 3225458337dbSTejun Heo } 3226458337dbSTejun Heo 3227458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3228458337dbSTejun Heo 3229458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3230458337dbSTejun Heo return -ENOENT; 3231458337dbSTejun Heo 3232458337dbSTejun Heo if (!quiet) { 3233458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3234458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 3235458337dbSTejun Heo ata_mode_string(xfer_mask), 3236458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3237458337dbSTejun Heo else 3238458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 3239458337dbSTejun Heo ata_mode_string(xfer_mask)); 3240458337dbSTejun Heo 3241458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 3242458337dbSTejun Heo "limiting speed to %s\n", buf); 3243458337dbSTejun Heo } 3244c6fd2807SJeff Garzik 3245c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3246c6fd2807SJeff Garzik &dev->udma_mask); 3247c6fd2807SJeff Garzik 3248c6fd2807SJeff Garzik return 0; 3249c6fd2807SJeff Garzik } 3250c6fd2807SJeff Garzik 3251c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 3252c6fd2807SJeff Garzik { 32539af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 32544055dee7STejun Heo const char *dev_err_whine = ""; 32554055dee7STejun Heo int ign_dev_err = 0; 3256c6fd2807SJeff Garzik unsigned int err_mask; 3257c6fd2807SJeff Garzik int rc; 3258c6fd2807SJeff Garzik 3259c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 3260c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 3261c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 3262c6fd2807SJeff Garzik 3263c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 32642dcb407eSJeff Garzik 32654055dee7STejun Heo if (err_mask & ~AC_ERR_DEV) 32664055dee7STejun Heo goto fail; 32672dcb407eSJeff Garzik 32684055dee7STejun Heo /* revalidate */ 3269baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 3270422c9daaSTejun Heo rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3271baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3272c6fd2807SJeff Garzik if (rc) 3273c6fd2807SJeff Garzik return rc; 3274c6fd2807SJeff Garzik 32754055dee7STejun Heo /* Old CFA may refuse this command, which is just fine */ 32764055dee7STejun Heo if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 32774055dee7STejun Heo ign_dev_err = 1; 32784055dee7STejun Heo 32794055dee7STejun Heo /* Some very old devices and some bad newer ones fail any kind of 32804055dee7STejun Heo SET_XFERMODE request but support PIO0-2 timings and no IORDY */ 32814055dee7STejun Heo if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && 32824055dee7STejun Heo dev->pio_mode <= XFER_PIO_2) 32834055dee7STejun Heo ign_dev_err = 1; 32844055dee7STejun Heo 32854055dee7STejun Heo /* Early MWDMA devices do DMA but don't allow DMA mode setting. 32864055dee7STejun Heo Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 32874055dee7STejun Heo if (dev->xfer_shift == ATA_SHIFT_MWDMA && 32884055dee7STejun Heo dev->dma_mode == XFER_MW_DMA_0 && 32894055dee7STejun Heo (dev->id[63] >> 8) & 1) 32904055dee7STejun Heo ign_dev_err = 1; 32914055dee7STejun Heo 32924055dee7STejun Heo /* if the device is actually configured correctly, ignore dev err */ 32934055dee7STejun Heo if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 32944055dee7STejun Heo ign_dev_err = 1; 32954055dee7STejun Heo 32964055dee7STejun Heo if (err_mask & AC_ERR_DEV) { 32974055dee7STejun Heo if (!ign_dev_err) 32984055dee7STejun Heo goto fail; 32994055dee7STejun Heo else 33004055dee7STejun Heo dev_err_whine = " (device error ignored)"; 33014055dee7STejun Heo } 33024055dee7STejun Heo 3303c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 3304c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 3305c6fd2807SJeff Garzik 33064055dee7STejun Heo ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", 33074055dee7STejun Heo ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 33084055dee7STejun Heo dev_err_whine); 33094055dee7STejun Heo 3310c6fd2807SJeff Garzik return 0; 33114055dee7STejun Heo 33124055dee7STejun Heo fail: 33134055dee7STejun Heo ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 33144055dee7STejun Heo "(err_mask=0x%x)\n", err_mask); 33154055dee7STejun Heo return -EIO; 3316c6fd2807SJeff Garzik } 3317c6fd2807SJeff Garzik 3318c6fd2807SJeff Garzik /** 331904351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 33200260731fSTejun Heo * @link: link on which timings will be programmed 33211967b7ffSJoe Perches * @r_failed_dev: out parameter for failed device 3322c6fd2807SJeff Garzik * 332304351821SAlan * Standard implementation of the function used to tune and set 332404351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 332504351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 3326c6fd2807SJeff Garzik * returned in @r_failed_dev. 3327c6fd2807SJeff Garzik * 3328c6fd2807SJeff Garzik * LOCKING: 3329c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3330c6fd2807SJeff Garzik * 3331c6fd2807SJeff Garzik * RETURNS: 3332c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3333c6fd2807SJeff Garzik */ 333404351821SAlan 33350260731fSTejun Heo int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3336c6fd2807SJeff Garzik { 33370260731fSTejun Heo struct ata_port *ap = link->ap; 3338c6fd2807SJeff Garzik struct ata_device *dev; 3339f58229f8STejun Heo int rc = 0, used_dma = 0, found = 0; 3340c6fd2807SJeff Garzik 3341c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 3342f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 33437dc951aeSTejun Heo unsigned long pio_mask, dma_mask; 3344b3a70601SAlan Cox unsigned int mode_mask; 3345c6fd2807SJeff Garzik 3346c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 3347c6fd2807SJeff Garzik continue; 3348c6fd2807SJeff Garzik 3349b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATA; 3350b3a70601SAlan Cox if (dev->class == ATA_DEV_ATAPI) 3351b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATAPI; 3352b3a70601SAlan Cox else if (ata_id_is_cfa(dev->id)) 3353b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_CFA; 3354b3a70601SAlan Cox 3355c6fd2807SJeff Garzik ata_dev_xfermask(dev); 335633267325STejun Heo ata_force_xfermask(dev); 3357c6fd2807SJeff Garzik 3358c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3359c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 3360b3a70601SAlan Cox 3361b3a70601SAlan Cox if (libata_dma_mask & mode_mask) 3362b3a70601SAlan Cox dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 3363b3a70601SAlan Cox else 3364b3a70601SAlan Cox dma_mask = 0; 3365b3a70601SAlan Cox 3366c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3367c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3368c6fd2807SJeff Garzik 3369c6fd2807SJeff Garzik found = 1; 337070cd071eSTejun Heo if (dev->dma_mode != 0xff) 3371c6fd2807SJeff Garzik used_dma = 1; 3372c6fd2807SJeff Garzik } 3373c6fd2807SJeff Garzik if (!found) 3374c6fd2807SJeff Garzik goto out; 3375c6fd2807SJeff Garzik 3376c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 3377f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 3378c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 3379c6fd2807SJeff Garzik continue; 3380c6fd2807SJeff Garzik 338170cd071eSTejun Heo if (dev->pio_mode == 0xff) { 3382c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 3383c6fd2807SJeff Garzik rc = -EINVAL; 3384c6fd2807SJeff Garzik goto out; 3385c6fd2807SJeff Garzik } 3386c6fd2807SJeff Garzik 3387c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 3388c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 3389c6fd2807SJeff Garzik if (ap->ops->set_piomode) 3390c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 3391c6fd2807SJeff Garzik } 3392c6fd2807SJeff Garzik 3393c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 3394f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 339570cd071eSTejun Heo if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff) 3396c6fd2807SJeff Garzik continue; 3397c6fd2807SJeff Garzik 3398c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 3399c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3400c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 3401c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 3402c6fd2807SJeff Garzik } 3403c6fd2807SJeff Garzik 3404c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 3405f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 340618d90debSAlan /* don't update suspended devices' xfer mode */ 34079666f400STejun Heo if (!ata_dev_enabled(dev)) 3408c6fd2807SJeff Garzik continue; 3409c6fd2807SJeff Garzik 3410c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 3411c6fd2807SJeff Garzik if (rc) 3412c6fd2807SJeff Garzik goto out; 3413c6fd2807SJeff Garzik } 3414c6fd2807SJeff Garzik 3415c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 3416c6fd2807SJeff Garzik * host channels are not permitted to do so. 3417c6fd2807SJeff Garzik */ 3418cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3419032af1ceSAlan ap->host->simplex_claimed = ap; 3420c6fd2807SJeff Garzik 3421c6fd2807SJeff Garzik out: 3422c6fd2807SJeff Garzik if (rc) 3423c6fd2807SJeff Garzik *r_failed_dev = dev; 3424c6fd2807SJeff Garzik return rc; 3425c6fd2807SJeff Garzik } 3426c6fd2807SJeff Garzik 3427c6fd2807SJeff Garzik /** 3428c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 3429c6fd2807SJeff Garzik * @ap: port to which command is being issued 3430c6fd2807SJeff Garzik * @tf: ATA taskfile register set 3431c6fd2807SJeff Garzik * 3432c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 3433c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 3434c6fd2807SJeff Garzik * other threads. 3435c6fd2807SJeff Garzik * 3436c6fd2807SJeff Garzik * LOCKING: 3437cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3438c6fd2807SJeff Garzik */ 3439c6fd2807SJeff Garzik 3440c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 3441c6fd2807SJeff Garzik const struct ata_taskfile *tf) 3442c6fd2807SJeff Garzik { 3443c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 3444c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 3445c6fd2807SJeff Garzik } 3446c6fd2807SJeff Garzik 3447c6fd2807SJeff Garzik /** 3448c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 3449c6fd2807SJeff Garzik * @ap: port containing status register to be polled 3450c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 3451c6fd2807SJeff Garzik * @tmout: overall timeout 3452c6fd2807SJeff Garzik * 3453c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 3454c6fd2807SJeff Garzik * or a timeout occurs. 3455c6fd2807SJeff Garzik * 3456d1adc1bbSTejun Heo * LOCKING: 3457d1adc1bbSTejun Heo * Kernel thread context (may sleep). 3458d1adc1bbSTejun Heo * 3459d1adc1bbSTejun Heo * RETURNS: 3460d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 3461c6fd2807SJeff Garzik */ 3462d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 3463c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 3464c6fd2807SJeff Garzik { 3465c6fd2807SJeff Garzik unsigned long timer_start, timeout; 3466c6fd2807SJeff Garzik u8 status; 3467c6fd2807SJeff Garzik 3468c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 3469c6fd2807SJeff Garzik timer_start = jiffies; 3470c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 3471d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 3472d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 3473c6fd2807SJeff Garzik msleep(50); 3474c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 3475c6fd2807SJeff Garzik } 3476c6fd2807SJeff Garzik 3477d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 3478c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 347935aa7a43SJeff Garzik "port is slow to respond, please be patient " 348035aa7a43SJeff Garzik "(Status 0x%x)\n", status); 3481c6fd2807SJeff Garzik 3482c6fd2807SJeff Garzik timeout = timer_start + tmout; 3483d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 3484d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 3485c6fd2807SJeff Garzik msleep(50); 3486c6fd2807SJeff Garzik status = ata_chk_status(ap); 3487c6fd2807SJeff Garzik } 3488c6fd2807SJeff Garzik 3489d1adc1bbSTejun Heo if (status == 0xff) 3490d1adc1bbSTejun Heo return -ENODEV; 3491d1adc1bbSTejun Heo 3492c6fd2807SJeff Garzik if (status & ATA_BUSY) { 3493c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 349435aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 349535aa7a43SJeff Garzik tmout / HZ, status); 3496d1adc1bbSTejun Heo return -EBUSY; 3497c6fd2807SJeff Garzik } 3498c6fd2807SJeff Garzik 3499c6fd2807SJeff Garzik return 0; 3500c6fd2807SJeff Garzik } 3501c6fd2807SJeff Garzik 3502d4b2bab4STejun Heo /** 350388ff6eafSTejun Heo * ata_wait_after_reset - wait before checking status after reset 350488ff6eafSTejun Heo * @ap: port containing status register to be polled 350588ff6eafSTejun Heo * @deadline: deadline jiffies for the operation 350688ff6eafSTejun Heo * 350788ff6eafSTejun Heo * After reset, we need to pause a while before reading status. 350888ff6eafSTejun Heo * Also, certain combination of controller and device report 0xff 350988ff6eafSTejun Heo * for some duration (e.g. until SATA PHY is up and running) 351088ff6eafSTejun Heo * which is interpreted as empty port in ATA world. This 351188ff6eafSTejun Heo * function also waits for such devices to get out of 0xff 351288ff6eafSTejun Heo * status. 351388ff6eafSTejun Heo * 351488ff6eafSTejun Heo * LOCKING: 351588ff6eafSTejun Heo * Kernel thread context (may sleep). 351688ff6eafSTejun Heo */ 351788ff6eafSTejun Heo void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline) 351888ff6eafSTejun Heo { 351988ff6eafSTejun Heo unsigned long until = jiffies + ATA_TMOUT_FF_WAIT; 352088ff6eafSTejun Heo 352188ff6eafSTejun Heo if (time_before(until, deadline)) 352288ff6eafSTejun Heo deadline = until; 352388ff6eafSTejun Heo 352488ff6eafSTejun Heo /* Spec mandates ">= 2ms" before checking status. We wait 352588ff6eafSTejun Heo * 150ms, because that was the magic delay used for ATAPI 352688ff6eafSTejun Heo * devices in Hale Landis's ATADRVR, for the period of time 352788ff6eafSTejun Heo * between when the ATA command register is written, and then 352888ff6eafSTejun Heo * status is checked. Because waiting for "a while" before 352988ff6eafSTejun Heo * checking status is fine, post SRST, we perform this magic 353088ff6eafSTejun Heo * delay here as well. 353188ff6eafSTejun Heo * 353288ff6eafSTejun Heo * Old drivers/ide uses the 2mS rule and then waits for ready. 353388ff6eafSTejun Heo */ 353488ff6eafSTejun Heo msleep(150); 353588ff6eafSTejun Heo 353688ff6eafSTejun Heo /* Wait for 0xff to clear. Some SATA devices take a long time 353788ff6eafSTejun Heo * to clear 0xff after reset. For example, HHD424020F7SV00 353888ff6eafSTejun Heo * iVDR needs >= 800ms while. Quantum GoVault needs even more 353988ff6eafSTejun Heo * than that. 35401974e201STejun Heo * 35411974e201STejun Heo * Note that some PATA controllers (pata_ali) explode if 35421974e201STejun Heo * status register is read more than once when there's no 35431974e201STejun Heo * device attached. 354488ff6eafSTejun Heo */ 35451974e201STejun Heo if (ap->flags & ATA_FLAG_SATA) { 354688ff6eafSTejun Heo while (1) { 354788ff6eafSTejun Heo u8 status = ata_chk_status(ap); 354888ff6eafSTejun Heo 354988ff6eafSTejun Heo if (status != 0xff || time_after(jiffies, deadline)) 355088ff6eafSTejun Heo return; 355188ff6eafSTejun Heo 355288ff6eafSTejun Heo msleep(50); 355388ff6eafSTejun Heo } 355488ff6eafSTejun Heo } 35551974e201STejun Heo } 355688ff6eafSTejun Heo 355788ff6eafSTejun Heo /** 3558d4b2bab4STejun Heo * ata_wait_ready - sleep until BSY clears, or timeout 3559d4b2bab4STejun Heo * @ap: port containing status register to be polled 3560d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3561d4b2bab4STejun Heo * 3562d4b2bab4STejun Heo * Sleep until ATA Status register bit BSY clears, or timeout 3563d4b2bab4STejun Heo * occurs. 3564d4b2bab4STejun Heo * 3565d4b2bab4STejun Heo * LOCKING: 3566d4b2bab4STejun Heo * Kernel thread context (may sleep). 3567d4b2bab4STejun Heo * 3568d4b2bab4STejun Heo * RETURNS: 3569d4b2bab4STejun Heo * 0 on success, -errno otherwise. 3570d4b2bab4STejun Heo */ 3571d4b2bab4STejun Heo int ata_wait_ready(struct ata_port *ap, unsigned long deadline) 3572d4b2bab4STejun Heo { 3573d4b2bab4STejun Heo unsigned long start = jiffies; 3574d4b2bab4STejun Heo int warned = 0; 3575d4b2bab4STejun Heo 3576d4b2bab4STejun Heo while (1) { 3577d4b2bab4STejun Heo u8 status = ata_chk_status(ap); 3578d4b2bab4STejun Heo unsigned long now = jiffies; 3579d4b2bab4STejun Heo 3580d4b2bab4STejun Heo if (!(status & ATA_BUSY)) 3581d4b2bab4STejun Heo return 0; 3582936fd732STejun Heo if (!ata_link_online(&ap->link) && status == 0xff) 3583d4b2bab4STejun Heo return -ENODEV; 3584d4b2bab4STejun Heo if (time_after(now, deadline)) 3585d4b2bab4STejun Heo return -EBUSY; 3586d4b2bab4STejun Heo 3587d4b2bab4STejun Heo if (!warned && time_after(now, start + 5 * HZ) && 3588d4b2bab4STejun Heo (deadline - now > 3 * HZ)) { 3589d4b2bab4STejun Heo ata_port_printk(ap, KERN_WARNING, 3590d4b2bab4STejun Heo "port is slow to respond, please be patient " 3591d4b2bab4STejun Heo "(Status 0x%x)\n", status); 3592d4b2bab4STejun Heo warned = 1; 3593d4b2bab4STejun Heo } 3594d4b2bab4STejun Heo 3595d4b2bab4STejun Heo msleep(50); 3596d4b2bab4STejun Heo } 3597d4b2bab4STejun Heo } 3598d4b2bab4STejun Heo 3599d4b2bab4STejun Heo static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, 3600d4b2bab4STejun Heo unsigned long deadline) 3601c6fd2807SJeff Garzik { 3602c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3603c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 3604c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 36059b89391cSTejun Heo int rc, ret = 0; 3606c6fd2807SJeff Garzik 3607c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 3608c6fd2807SJeff Garzik * BSY bit to clear 3609c6fd2807SJeff Garzik */ 3610d4b2bab4STejun Heo if (dev0) { 3611d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 36129b89391cSTejun Heo if (rc) { 36139b89391cSTejun Heo if (rc != -ENODEV) 3614d4b2bab4STejun Heo return rc; 36159b89391cSTejun Heo ret = rc; 36169b89391cSTejun Heo } 3617d4b2bab4STejun Heo } 3618c6fd2807SJeff Garzik 3619e141d999STejun Heo /* if device 1 was found in ata_devchk, wait for register 3620e141d999STejun Heo * access briefly, then wait for BSY to clear. 3621c6fd2807SJeff Garzik */ 3622e141d999STejun Heo if (dev1) { 3623e141d999STejun Heo int i; 3624c6fd2807SJeff Garzik 3625c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3626e141d999STejun Heo 3627e141d999STejun Heo /* Wait for register access. Some ATAPI devices fail 3628e141d999STejun Heo * to set nsect/lbal after reset, so don't waste too 3629e141d999STejun Heo * much time on it. We're gonna wait for !BSY anyway. 3630e141d999STejun Heo */ 3631e141d999STejun Heo for (i = 0; i < 2; i++) { 3632e141d999STejun Heo u8 nsect, lbal; 3633e141d999STejun Heo 36340d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 36350d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 3636c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 3637c6fd2807SJeff Garzik break; 3638c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 3639c6fd2807SJeff Garzik } 3640e141d999STejun Heo 3641d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 36429b89391cSTejun Heo if (rc) { 36439b89391cSTejun Heo if (rc != -ENODEV) 3644d4b2bab4STejun Heo return rc; 36459b89391cSTejun Heo ret = rc; 36469b89391cSTejun Heo } 3647d4b2bab4STejun Heo } 3648c6fd2807SJeff Garzik 3649c6fd2807SJeff Garzik /* is all this really necessary? */ 3650c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3651c6fd2807SJeff Garzik if (dev1) 3652c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3653c6fd2807SJeff Garzik if (dev0) 3654c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3655d4b2bab4STejun Heo 36569b89391cSTejun Heo return ret; 3657c6fd2807SJeff Garzik } 3658c6fd2807SJeff Garzik 3659d4b2bab4STejun Heo static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, 3660d4b2bab4STejun Heo unsigned long deadline) 3661c6fd2807SJeff Garzik { 3662c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3663c6fd2807SJeff Garzik 366444877b4eSTejun Heo DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); 3665c6fd2807SJeff Garzik 3666c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 36670d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3668c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 36690d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 3670c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 36710d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3672c6fd2807SJeff Garzik 367388ff6eafSTejun Heo /* wait a while before checking status */ 367488ff6eafSTejun Heo ata_wait_after_reset(ap, deadline); 3675c6fd2807SJeff Garzik 3676c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 3677c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 3678c6fd2807SJeff Garzik * pulldown resistor. 3679c6fd2807SJeff Garzik */ 3680150981b0SAlan Cox if (ata_chk_status(ap) == 0xFF) 36819b89391cSTejun Heo return -ENODEV; 3682c6fd2807SJeff Garzik 3683d4b2bab4STejun Heo return ata_bus_post_reset(ap, devmask, deadline); 3684c6fd2807SJeff Garzik } 3685c6fd2807SJeff Garzik 3686c6fd2807SJeff Garzik /** 3687c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 3688c6fd2807SJeff Garzik * @ap: port to reset 3689c6fd2807SJeff Garzik * 3690c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 3691c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 3692c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 3693c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 3694c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 3695c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 3696c6fd2807SJeff Garzik * the device is ATA or ATAPI. 3697c6fd2807SJeff Garzik * 3698c6fd2807SJeff Garzik * LOCKING: 3699c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3700cca3974eSJeff Garzik * Obtains host lock. 3701c6fd2807SJeff Garzik * 3702c6fd2807SJeff Garzik * SIDE EFFECTS: 3703c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 3704c6fd2807SJeff Garzik */ 3705c6fd2807SJeff Garzik 3706c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 3707c6fd2807SJeff Garzik { 37089af5c9c9STejun Heo struct ata_device *device = ap->link.device; 3709c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3710c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3711c6fd2807SJeff Garzik u8 err; 3712c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 37139b89391cSTejun Heo int rc; 3714c6fd2807SJeff Garzik 371544877b4eSTejun Heo DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); 3716c6fd2807SJeff Garzik 3717c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3718c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 3719c6fd2807SJeff Garzik dev0 = 1; 3720c6fd2807SJeff Garzik else { 3721c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 3722c6fd2807SJeff Garzik if (slave_possible) 3723c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 3724c6fd2807SJeff Garzik } 3725c6fd2807SJeff Garzik 3726c6fd2807SJeff Garzik if (dev0) 3727c6fd2807SJeff Garzik devmask |= (1 << 0); 3728c6fd2807SJeff Garzik if (dev1) 3729c6fd2807SJeff Garzik devmask |= (1 << 1); 3730c6fd2807SJeff Garzik 3731c6fd2807SJeff Garzik /* select device 0 again */ 3732c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3733c6fd2807SJeff Garzik 3734c6fd2807SJeff Garzik /* issue bus reset */ 37359b89391cSTejun Heo if (ap->flags & ATA_FLAG_SRST) { 37369b89391cSTejun Heo rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); 37379b89391cSTejun Heo if (rc && rc != -ENODEV) 3738c6fd2807SJeff Garzik goto err_out; 37399b89391cSTejun Heo } 3740c6fd2807SJeff Garzik 3741c6fd2807SJeff Garzik /* 3742c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 3743c6fd2807SJeff Garzik */ 37443f19859eSTejun Heo device[0].class = ata_dev_try_classify(&device[0], dev0, &err); 3745c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 37463f19859eSTejun Heo device[1].class = ata_dev_try_classify(&device[1], dev1, &err); 3747c6fd2807SJeff Garzik 3748c6fd2807SJeff Garzik /* is double-select really necessary? */ 37499af5c9c9STejun Heo if (device[1].class != ATA_DEV_NONE) 3750c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 37519af5c9c9STejun Heo if (device[0].class != ATA_DEV_NONE) 3752c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3753c6fd2807SJeff Garzik 3754c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 37559af5c9c9STejun Heo if ((device[0].class == ATA_DEV_NONE) && 37569af5c9c9STejun Heo (device[1].class == ATA_DEV_NONE)) 3757c6fd2807SJeff Garzik goto err_out; 3758c6fd2807SJeff Garzik 3759c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 3760c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 37610d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3762c6fd2807SJeff Garzik } 3763c6fd2807SJeff Garzik 3764c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3765c6fd2807SJeff Garzik return; 3766c6fd2807SJeff Garzik 3767c6fd2807SJeff Garzik err_out: 3768c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 3769ac8869d5SJeff Garzik ata_port_disable(ap); 3770c6fd2807SJeff Garzik 3771c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3772c6fd2807SJeff Garzik } 3773c6fd2807SJeff Garzik 3774c6fd2807SJeff Garzik /** 3775936fd732STejun Heo * sata_link_debounce - debounce SATA phy status 3776936fd732STejun Heo * @link: ATA link to debounce SATA phy status for 3777c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3778d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3779c6fd2807SJeff Garzik * 3780936fd732STejun Heo * Make sure SStatus of @link reaches stable state, determined by 3781c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3782c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3783d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3784d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3785c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3786c6fd2807SJeff Garzik * 3787d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3788d4b2bab4STejun Heo * two is used. 3789d4b2bab4STejun Heo * 3790c6fd2807SJeff Garzik * LOCKING: 3791c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3792c6fd2807SJeff Garzik * 3793c6fd2807SJeff Garzik * RETURNS: 3794c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3795c6fd2807SJeff Garzik */ 3796936fd732STejun Heo int sata_link_debounce(struct ata_link *link, const unsigned long *params, 3797d4b2bab4STejun Heo unsigned long deadline) 3798c6fd2807SJeff Garzik { 3799c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 3800d4b2bab4STejun Heo unsigned long duration = msecs_to_jiffies(params[1]); 3801d4b2bab4STejun Heo unsigned long last_jiffies, t; 3802c6fd2807SJeff Garzik u32 last, cur; 3803c6fd2807SJeff Garzik int rc; 3804c6fd2807SJeff Garzik 3805d4b2bab4STejun Heo t = jiffies + msecs_to_jiffies(params[2]); 3806d4b2bab4STejun Heo if (time_before(t, deadline)) 3807d4b2bab4STejun Heo deadline = t; 3808d4b2bab4STejun Heo 3809936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3810c6fd2807SJeff Garzik return rc; 3811c6fd2807SJeff Garzik cur &= 0xf; 3812c6fd2807SJeff Garzik 3813c6fd2807SJeff Garzik last = cur; 3814c6fd2807SJeff Garzik last_jiffies = jiffies; 3815c6fd2807SJeff Garzik 3816c6fd2807SJeff Garzik while (1) { 3817c6fd2807SJeff Garzik msleep(interval_msec); 3818936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3819c6fd2807SJeff Garzik return rc; 3820c6fd2807SJeff Garzik cur &= 0xf; 3821c6fd2807SJeff Garzik 3822c6fd2807SJeff Garzik /* DET stable? */ 3823c6fd2807SJeff Garzik if (cur == last) { 3824d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3825c6fd2807SJeff Garzik continue; 3826c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 3827c6fd2807SJeff Garzik return 0; 3828c6fd2807SJeff Garzik continue; 3829c6fd2807SJeff Garzik } 3830c6fd2807SJeff Garzik 3831c6fd2807SJeff Garzik /* unstable, start over */ 3832c6fd2807SJeff Garzik last = cur; 3833c6fd2807SJeff Garzik last_jiffies = jiffies; 3834c6fd2807SJeff Garzik 3835f1545154STejun Heo /* Check deadline. If debouncing failed, return 3836f1545154STejun Heo * -EPIPE to tell upper layer to lower link speed. 3837f1545154STejun Heo */ 3838d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3839f1545154STejun Heo return -EPIPE; 3840c6fd2807SJeff Garzik } 3841c6fd2807SJeff Garzik } 3842c6fd2807SJeff Garzik 3843c6fd2807SJeff Garzik /** 3844936fd732STejun Heo * sata_link_resume - resume SATA link 3845936fd732STejun Heo * @link: ATA link to resume SATA 3846c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3847d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3848c6fd2807SJeff Garzik * 3849936fd732STejun Heo * Resume SATA phy @link and debounce it. 3850c6fd2807SJeff Garzik * 3851c6fd2807SJeff Garzik * LOCKING: 3852c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3853c6fd2807SJeff Garzik * 3854c6fd2807SJeff Garzik * RETURNS: 3855c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3856c6fd2807SJeff Garzik */ 3857936fd732STejun Heo int sata_link_resume(struct ata_link *link, const unsigned long *params, 3858d4b2bab4STejun Heo unsigned long deadline) 3859c6fd2807SJeff Garzik { 3860c6fd2807SJeff Garzik u32 scontrol; 3861c6fd2807SJeff Garzik int rc; 3862c6fd2807SJeff Garzik 3863936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3864c6fd2807SJeff Garzik return rc; 3865c6fd2807SJeff Garzik 3866c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3867c6fd2807SJeff Garzik 3868936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3869c6fd2807SJeff Garzik return rc; 3870c6fd2807SJeff Garzik 3871c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 3872c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 3873c6fd2807SJeff Garzik */ 3874c6fd2807SJeff Garzik msleep(200); 3875c6fd2807SJeff Garzik 3876936fd732STejun Heo return sata_link_debounce(link, params, deadline); 3877c6fd2807SJeff Garzik } 3878c6fd2807SJeff Garzik 3879c6fd2807SJeff Garzik /** 3880c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 3881cc0680a5STejun Heo * @link: ATA link to be reset 3882d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3883c6fd2807SJeff Garzik * 3884cc0680a5STejun Heo * @link is about to be reset. Initialize it. Failure from 3885b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3886b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3887b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3888b8cffc6aSTejun Heo * should just whine, not fail. 3889c6fd2807SJeff Garzik * 3890c6fd2807SJeff Garzik * LOCKING: 3891c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3892c6fd2807SJeff Garzik * 3893c6fd2807SJeff Garzik * RETURNS: 3894c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3895c6fd2807SJeff Garzik */ 3896cc0680a5STejun Heo int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3897c6fd2807SJeff Garzik { 3898cc0680a5STejun Heo struct ata_port *ap = link->ap; 3899936fd732STejun Heo struct ata_eh_context *ehc = &link->eh_context; 3900c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3901c6fd2807SJeff Garzik int rc; 3902c6fd2807SJeff Garzik 390331daabdaSTejun Heo /* handle link resume */ 3904c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 39050c88758bSTejun Heo (link->flags & ATA_LFLAG_HRST_TO_RESUME)) 3906c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 3907c6fd2807SJeff Garzik 3908633273a3STejun Heo /* Some PMPs don't work with only SRST, force hardreset if PMP 3909633273a3STejun Heo * is supported. 3910633273a3STejun Heo */ 3911633273a3STejun Heo if (ap->flags & ATA_FLAG_PMP) 3912633273a3STejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3913633273a3STejun Heo 3914c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3915c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3916c6fd2807SJeff Garzik return 0; 3917c6fd2807SJeff Garzik 3918936fd732STejun Heo /* if SATA, resume link */ 3919a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3920936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 3921b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3922b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3923cc0680a5STejun Heo ata_link_printk(link, KERN_WARNING, "failed to resume " 3924c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3925c6fd2807SJeff Garzik } 3926c6fd2807SJeff Garzik 3927c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 3928c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 3929c6fd2807SJeff Garzik */ 39300c88758bSTejun Heo if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { 3931b8cffc6aSTejun Heo rc = ata_wait_ready(ap, deadline); 39326dffaf61STejun Heo if (rc && rc != -ENODEV) { 3933cc0680a5STejun Heo ata_link_printk(link, KERN_WARNING, "device not ready " 3934b8cffc6aSTejun Heo "(errno=%d), forcing hardreset\n", rc); 3935b8cffc6aSTejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3936b8cffc6aSTejun Heo } 3937b8cffc6aSTejun Heo } 3938c6fd2807SJeff Garzik 3939c6fd2807SJeff Garzik return 0; 3940c6fd2807SJeff Garzik } 3941c6fd2807SJeff Garzik 3942c6fd2807SJeff Garzik /** 3943c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 3944cc0680a5STejun Heo * @link: ATA link to reset 3945c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 3946d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3947c6fd2807SJeff Garzik * 3948c6fd2807SJeff Garzik * Reset host port using ATA SRST. 3949c6fd2807SJeff Garzik * 3950c6fd2807SJeff Garzik * LOCKING: 3951c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3952c6fd2807SJeff Garzik * 3953c6fd2807SJeff Garzik * RETURNS: 3954c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3955c6fd2807SJeff Garzik */ 3956cc0680a5STejun Heo int ata_std_softreset(struct ata_link *link, unsigned int *classes, 3957d4b2bab4STejun Heo unsigned long deadline) 3958c6fd2807SJeff Garzik { 3959cc0680a5STejun Heo struct ata_port *ap = link->ap; 3960c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3961d4b2bab4STejun Heo unsigned int devmask = 0; 3962d4b2bab4STejun Heo int rc; 3963c6fd2807SJeff Garzik u8 err; 3964c6fd2807SJeff Garzik 3965c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3966c6fd2807SJeff Garzik 3967936fd732STejun Heo if (ata_link_offline(link)) { 3968c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 3969c6fd2807SJeff Garzik goto out; 3970c6fd2807SJeff Garzik } 3971c6fd2807SJeff Garzik 3972c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3973c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 3974c6fd2807SJeff Garzik devmask |= (1 << 0); 3975c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 3976c6fd2807SJeff Garzik devmask |= (1 << 1); 3977c6fd2807SJeff Garzik 3978c6fd2807SJeff Garzik /* select device 0 again */ 3979c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3980c6fd2807SJeff Garzik 3981c6fd2807SJeff Garzik /* issue bus reset */ 3982c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 3983d4b2bab4STejun Heo rc = ata_bus_softreset(ap, devmask, deadline); 39849b89391cSTejun Heo /* if link is occupied, -ENODEV too is an error */ 3985936fd732STejun Heo if (rc && (rc != -ENODEV || sata_scr_valid(link))) { 3986cc0680a5STejun Heo ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); 3987d4b2bab4STejun Heo return rc; 3988c6fd2807SJeff Garzik } 3989c6fd2807SJeff Garzik 3990c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 39913f19859eSTejun Heo classes[0] = ata_dev_try_classify(&link->device[0], 39923f19859eSTejun Heo devmask & (1 << 0), &err); 3993c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 39943f19859eSTejun Heo classes[1] = ata_dev_try_classify(&link->device[1], 39953f19859eSTejun Heo devmask & (1 << 1), &err); 3996c6fd2807SJeff Garzik 3997c6fd2807SJeff Garzik out: 3998c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3999c6fd2807SJeff Garzik return 0; 4000c6fd2807SJeff Garzik } 4001c6fd2807SJeff Garzik 4002c6fd2807SJeff Garzik /** 4003cc0680a5STejun Heo * sata_link_hardreset - reset link via SATA phy reset 4004cc0680a5STejun Heo * @link: link to reset 4005b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 4006d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 4007c6fd2807SJeff Garzik * 4008cc0680a5STejun Heo * SATA phy-reset @link using DET bits of SControl register. 4009c6fd2807SJeff Garzik * 4010c6fd2807SJeff Garzik * LOCKING: 4011c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4012c6fd2807SJeff Garzik * 4013c6fd2807SJeff Garzik * RETURNS: 4014c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 4015c6fd2807SJeff Garzik */ 4016cc0680a5STejun Heo int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, 4017d4b2bab4STejun Heo unsigned long deadline) 4018c6fd2807SJeff Garzik { 4019c6fd2807SJeff Garzik u32 scontrol; 4020c6fd2807SJeff Garzik int rc; 4021c6fd2807SJeff Garzik 4022c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 4023c6fd2807SJeff Garzik 4024936fd732STejun Heo if (sata_set_spd_needed(link)) { 4025c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 4026c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 4027c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 4028c6fd2807SJeff Garzik * and Sil3124. 4029c6fd2807SJeff Garzik */ 4030936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 4031b6103f6dSTejun Heo goto out; 4032c6fd2807SJeff Garzik 4033cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 4034c6fd2807SJeff Garzik 4035936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 4036b6103f6dSTejun Heo goto out; 4037c6fd2807SJeff Garzik 4038936fd732STejun Heo sata_set_spd(link); 4039c6fd2807SJeff Garzik } 4040c6fd2807SJeff Garzik 4041c6fd2807SJeff Garzik /* issue phy wake/reset */ 4042936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 4043b6103f6dSTejun Heo goto out; 4044c6fd2807SJeff Garzik 4045c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 4046c6fd2807SJeff Garzik 4047936fd732STejun Heo if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) 4048b6103f6dSTejun Heo goto out; 4049c6fd2807SJeff Garzik 4050c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 4051c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 4052c6fd2807SJeff Garzik */ 4053c6fd2807SJeff Garzik msleep(1); 4054c6fd2807SJeff Garzik 4055936fd732STejun Heo /* bring link back */ 4056936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 4057b6103f6dSTejun Heo out: 4058b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 4059b6103f6dSTejun Heo return rc; 4060b6103f6dSTejun Heo } 4061b6103f6dSTejun Heo 4062b6103f6dSTejun Heo /** 4063b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 4064cc0680a5STejun Heo * @link: link to reset 4065b6103f6dSTejun Heo * @class: resulting class of attached device 4066d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 4067b6103f6dSTejun Heo * 4068b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 4069b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 4070b6103f6dSTejun Heo * 4071b6103f6dSTejun Heo * LOCKING: 4072b6103f6dSTejun Heo * Kernel thread context (may sleep) 4073b6103f6dSTejun Heo * 4074b6103f6dSTejun Heo * RETURNS: 4075b6103f6dSTejun Heo * 0 on success, -errno otherwise. 4076b6103f6dSTejun Heo */ 4077cc0680a5STejun Heo int sata_std_hardreset(struct ata_link *link, unsigned int *class, 4078d4b2bab4STejun Heo unsigned long deadline) 4079b6103f6dSTejun Heo { 4080cc0680a5STejun Heo struct ata_port *ap = link->ap; 4081936fd732STejun Heo const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 4082b6103f6dSTejun Heo int rc; 4083b6103f6dSTejun Heo 4084b6103f6dSTejun Heo DPRINTK("ENTER\n"); 4085b6103f6dSTejun Heo 4086b6103f6dSTejun Heo /* do hardreset */ 4087cc0680a5STejun Heo rc = sata_link_hardreset(link, timing, deadline); 4088b6103f6dSTejun Heo if (rc) { 4089cc0680a5STejun Heo ata_link_printk(link, KERN_ERR, 4090b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 4091b6103f6dSTejun Heo return rc; 4092b6103f6dSTejun Heo } 4093c6fd2807SJeff Garzik 4094c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 4095936fd732STejun Heo if (ata_link_offline(link)) { 4096c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 4097c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 4098c6fd2807SJeff Garzik return 0; 4099c6fd2807SJeff Garzik } 4100c6fd2807SJeff Garzik 410188ff6eafSTejun Heo /* wait a while before checking status */ 410288ff6eafSTejun Heo ata_wait_after_reset(ap, deadline); 410334fee227STejun Heo 4104633273a3STejun Heo /* If PMP is supported, we have to do follow-up SRST. Note 4105633273a3STejun Heo * that some PMPs don't send D2H Reg FIS after hardreset at 4106633273a3STejun Heo * all if the first port is empty. Wait for it just for a 4107633273a3STejun Heo * second and request follow-up SRST. 4108633273a3STejun Heo */ 4109633273a3STejun Heo if (ap->flags & ATA_FLAG_PMP) { 4110633273a3STejun Heo ata_wait_ready(ap, jiffies + HZ); 4111633273a3STejun Heo return -EAGAIN; 4112633273a3STejun Heo } 4113633273a3STejun Heo 4114d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 41159b89391cSTejun Heo /* link occupied, -ENODEV too is an error */ 41169b89391cSTejun Heo if (rc) { 4117cc0680a5STejun Heo ata_link_printk(link, KERN_ERR, 4118d4b2bab4STejun Heo "COMRESET failed (errno=%d)\n", rc); 4119d4b2bab4STejun Heo return rc; 4120c6fd2807SJeff Garzik } 4121c6fd2807SJeff Garzik 4122c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 4123c6fd2807SJeff Garzik 41243f19859eSTejun Heo *class = ata_dev_try_classify(link->device, 1, NULL); 4125c6fd2807SJeff Garzik 4126c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 4127c6fd2807SJeff Garzik return 0; 4128c6fd2807SJeff Garzik } 4129c6fd2807SJeff Garzik 4130c6fd2807SJeff Garzik /** 4131c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 4132cc0680a5STejun Heo * @link: the target ata_link 4133c6fd2807SJeff Garzik * @classes: classes of attached devices 4134c6fd2807SJeff Garzik * 4135c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 4136c6fd2807SJeff Garzik * the device might have been reset more than once using 4137c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 4138c6fd2807SJeff Garzik * 4139c6fd2807SJeff Garzik * LOCKING: 4140c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4141c6fd2807SJeff Garzik */ 4142cc0680a5STejun Heo void ata_std_postreset(struct ata_link *link, unsigned int *classes) 4143c6fd2807SJeff Garzik { 4144cc0680a5STejun Heo struct ata_port *ap = link->ap; 4145c6fd2807SJeff Garzik u32 serror; 4146c6fd2807SJeff Garzik 4147c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 4148c6fd2807SJeff Garzik 4149c6fd2807SJeff Garzik /* print link status */ 4150936fd732STejun Heo sata_print_link_status(link); 4151c6fd2807SJeff Garzik 4152c6fd2807SJeff Garzik /* clear SError */ 4153936fd732STejun Heo if (sata_scr_read(link, SCR_ERROR, &serror) == 0) 4154936fd732STejun Heo sata_scr_write(link, SCR_ERROR, serror); 4155f7fe7ad4STejun Heo link->eh_info.serror = 0; 4156c6fd2807SJeff Garzik 4157c6fd2807SJeff Garzik /* is double-select really necessary? */ 4158c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 4159c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 4160c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 4161c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 4162c6fd2807SJeff Garzik 4163c6fd2807SJeff Garzik /* bail out if no device is present */ 4164c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 4165c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 4166c6fd2807SJeff Garzik return; 4167c6fd2807SJeff Garzik } 4168c6fd2807SJeff Garzik 4169c6fd2807SJeff Garzik /* set up device control */ 41700d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 41710d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 4172c6fd2807SJeff Garzik 4173c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 4174c6fd2807SJeff Garzik } 4175c6fd2807SJeff Garzik 4176c6fd2807SJeff Garzik /** 4177c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 4178c6fd2807SJeff Garzik * @dev: device to compare against 4179c6fd2807SJeff Garzik * @new_class: class of the new device 4180c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 4181c6fd2807SJeff Garzik * 4182c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 4183c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 4184c6fd2807SJeff Garzik * @new_id. 4185c6fd2807SJeff Garzik * 4186c6fd2807SJeff Garzik * LOCKING: 4187c6fd2807SJeff Garzik * None. 4188c6fd2807SJeff Garzik * 4189c6fd2807SJeff Garzik * RETURNS: 4190c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 4191c6fd2807SJeff Garzik */ 4192c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 4193c6fd2807SJeff Garzik const u16 *new_id) 4194c6fd2807SJeff Garzik { 4195c6fd2807SJeff Garzik const u16 *old_id = dev->id; 4196a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 4197a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 4198c6fd2807SJeff Garzik 4199c6fd2807SJeff Garzik if (dev->class != new_class) { 4200c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 4201c6fd2807SJeff Garzik dev->class, new_class); 4202c6fd2807SJeff Garzik return 0; 4203c6fd2807SJeff Garzik } 4204c6fd2807SJeff Garzik 4205a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 4206a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 4207a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 4208a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 4209c6fd2807SJeff Garzik 4210c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 4211c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 4212c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 4213c6fd2807SJeff Garzik return 0; 4214c6fd2807SJeff Garzik } 4215c6fd2807SJeff Garzik 4216c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 4217c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 4218c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 4219c6fd2807SJeff Garzik return 0; 4220c6fd2807SJeff Garzik } 4221c6fd2807SJeff Garzik 4222c6fd2807SJeff Garzik return 1; 4223c6fd2807SJeff Garzik } 4224c6fd2807SJeff Garzik 4225c6fd2807SJeff Garzik /** 4226fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 42273fae450cSHenrik Kretzschmar * @dev: target ATA device 4228bff04647STejun Heo * @readid_flags: read ID flags 4229c6fd2807SJeff Garzik * 4230c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 4231c6fd2807SJeff Garzik * the port. 4232c6fd2807SJeff Garzik * 4233c6fd2807SJeff Garzik * LOCKING: 4234c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4235c6fd2807SJeff Garzik * 4236c6fd2807SJeff Garzik * RETURNS: 4237c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 4238c6fd2807SJeff Garzik */ 4239fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 4240c6fd2807SJeff Garzik { 4241c6fd2807SJeff Garzik unsigned int class = dev->class; 42429af5c9c9STejun Heo u16 *id = (void *)dev->link->ap->sector_buf; 4243c6fd2807SJeff Garzik int rc; 4244c6fd2807SJeff Garzik 4245c6fd2807SJeff Garzik /* read ID data */ 4246bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 4247c6fd2807SJeff Garzik if (rc) 4248fe30911bSTejun Heo return rc; 4249c6fd2807SJeff Garzik 4250c6fd2807SJeff Garzik /* is the device still there? */ 4251fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 4252fe30911bSTejun Heo return -ENODEV; 4253c6fd2807SJeff Garzik 4254c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 4255fe30911bSTejun Heo return 0; 4256fe30911bSTejun Heo } 4257fe30911bSTejun Heo 4258fe30911bSTejun Heo /** 4259fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 4260fe30911bSTejun Heo * @dev: device to revalidate 4261422c9daaSTejun Heo * @new_class: new class code 4262fe30911bSTejun Heo * @readid_flags: read ID flags 4263fe30911bSTejun Heo * 4264fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 4265fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 4266fe30911bSTejun Heo * 4267fe30911bSTejun Heo * LOCKING: 4268fe30911bSTejun Heo * Kernel thread context (may sleep) 4269fe30911bSTejun Heo * 4270fe30911bSTejun Heo * RETURNS: 4271fe30911bSTejun Heo * 0 on success, negative errno otherwise 4272fe30911bSTejun Heo */ 4273422c9daaSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 4274422c9daaSTejun Heo unsigned int readid_flags) 4275fe30911bSTejun Heo { 42766ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 4277fe30911bSTejun Heo int rc; 4278fe30911bSTejun Heo 4279fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 4280fe30911bSTejun Heo return -ENODEV; 4281fe30911bSTejun Heo 4282422c9daaSTejun Heo /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 4283422c9daaSTejun Heo if (ata_class_enabled(new_class) && 4284422c9daaSTejun Heo new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { 4285422c9daaSTejun Heo ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", 4286422c9daaSTejun Heo dev->class, new_class); 4287422c9daaSTejun Heo rc = -ENODEV; 4288422c9daaSTejun Heo goto fail; 4289422c9daaSTejun Heo } 4290422c9daaSTejun Heo 4291fe30911bSTejun Heo /* re-read ID */ 4292fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 4293fe30911bSTejun Heo if (rc) 4294fe30911bSTejun Heo goto fail; 4295c6fd2807SJeff Garzik 4296c6fd2807SJeff Garzik /* configure device according to the new ID */ 4297efdaedc4STejun Heo rc = ata_dev_configure(dev); 42986ddcd3b0STejun Heo if (rc) 42996ddcd3b0STejun Heo goto fail; 43006ddcd3b0STejun Heo 43016ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 4302b54eebd6STejun Heo if (dev->class == ATA_DEV_ATA && n_sectors && 4303b54eebd6STejun Heo dev->n_sectors != n_sectors) { 43046ddcd3b0STejun Heo ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 43056ddcd3b0STejun Heo "%llu != %llu\n", 43066ddcd3b0STejun Heo (unsigned long long)n_sectors, 43076ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 43088270bec4STejun Heo 43098270bec4STejun Heo /* restore original n_sectors */ 43108270bec4STejun Heo dev->n_sectors = n_sectors; 43118270bec4STejun Heo 43126ddcd3b0STejun Heo rc = -ENODEV; 43136ddcd3b0STejun Heo goto fail; 43146ddcd3b0STejun Heo } 43156ddcd3b0STejun Heo 4316c6fd2807SJeff Garzik return 0; 4317c6fd2807SJeff Garzik 4318c6fd2807SJeff Garzik fail: 4319c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 4320c6fd2807SJeff Garzik return rc; 4321c6fd2807SJeff Garzik } 4322c6fd2807SJeff Garzik 43236919a0a6SAlan Cox struct ata_blacklist_entry { 43246919a0a6SAlan Cox const char *model_num; 43256919a0a6SAlan Cox const char *model_rev; 43266919a0a6SAlan Cox unsigned long horkage; 43276919a0a6SAlan Cox }; 43286919a0a6SAlan Cox 43296919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 43306919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 43316919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 43326919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 43336919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 43346919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 43356919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 43366919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 43376919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 43386919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 43396919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 43406919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 43416919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 43426919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 43436919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 43446919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 43456919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 43466919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 43476919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 43486919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 43496919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 43506919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 43516919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 43526919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 43536919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 43546919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 43556919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 43566919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 43576919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 43586919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 43596919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, 436039f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 43613af9a77aSTejun Heo /* Odd clown on sil3726/4726 PMPs */ 43623af9a77aSTejun Heo { "Config Disk", NULL, ATA_HORKAGE_NODMA | 43633af9a77aSTejun Heo ATA_HORKAGE_SKIP_PM }, 43646919a0a6SAlan Cox 436518d6e9d5SAlbert Lee /* Weird ATAPI devices */ 436640a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 436718d6e9d5SAlbert Lee 43686919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 43696919a0a6SAlan Cox 43706919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 43716919a0a6SAlan Cox /* NCQ is slow */ 43726919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 4373459ad688STejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 437409125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 437509125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 43767acfaf30SPaul Rolland /* NCQ is broken */ 4377539cc7c7SJeff Garzik { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, 43780e3dbc01SAlan Cox { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, 4379da6f0ec2SPaolo Ornati { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, 4380e41bd3e8STejun Heo { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, 4381539cc7c7SJeff Garzik 438236e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 438336e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 438436e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 438536e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 438636e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 43876919a0a6SAlan Cox 438816c55b03STejun Heo /* devices which puke on READ_NATIVE_MAX */ 438916c55b03STejun Heo { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, 439016c55b03STejun Heo { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, 439116c55b03STejun Heo { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, 439216c55b03STejun Heo { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, 43936919a0a6SAlan Cox 439493328e11SAlan Cox /* Devices which report 1 sector over size HPA */ 439593328e11SAlan Cox { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, 439693328e11SAlan Cox { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, 4397b152fcd3SMikko Rapeli { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, 439893328e11SAlan Cox 43996bbfd53dSAlan Cox /* Devices which get the IVB wrong */ 44006bbfd53dSAlan Cox { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, 44016bbfd53dSAlan Cox { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, 4402e9f33406SPeter Missel { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, 4403e9f33406SPeter Missel { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, 4404e9f33406SPeter Missel { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, 44056bbfd53dSAlan Cox 44066919a0a6SAlan Cox /* End Marker */ 44076919a0a6SAlan Cox { } 4408c6fd2807SJeff Garzik }; 4409c6fd2807SJeff Garzik 4410741b7763SAdrian Bunk static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) 4411539cc7c7SJeff Garzik { 4412539cc7c7SJeff Garzik const char *p; 4413539cc7c7SJeff Garzik int len; 4414539cc7c7SJeff Garzik 4415539cc7c7SJeff Garzik /* 4416539cc7c7SJeff Garzik * check for trailing wildcard: *\0 4417539cc7c7SJeff Garzik */ 4418539cc7c7SJeff Garzik p = strchr(patt, wildchar); 4419539cc7c7SJeff Garzik if (p && ((*(p + 1)) == 0)) 4420539cc7c7SJeff Garzik len = p - patt; 4421317b50b8SAndrew Paprocki else { 4422539cc7c7SJeff Garzik len = strlen(name); 4423317b50b8SAndrew Paprocki if (!len) { 4424317b50b8SAndrew Paprocki if (!*patt) 4425317b50b8SAndrew Paprocki return 0; 4426317b50b8SAndrew Paprocki return -1; 4427317b50b8SAndrew Paprocki } 4428317b50b8SAndrew Paprocki } 4429539cc7c7SJeff Garzik 4430539cc7c7SJeff Garzik return strncmp(patt, name, len); 4431539cc7c7SJeff Garzik } 4432539cc7c7SJeff Garzik 443375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 4434c6fd2807SJeff Garzik { 44358bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 44368bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 44376919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 4438c6fd2807SJeff Garzik 44398bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 44408bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4441c6fd2807SJeff Garzik 44426919a0a6SAlan Cox while (ad->model_num) { 4443539cc7c7SJeff Garzik if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { 44446919a0a6SAlan Cox if (ad->model_rev == NULL) 44456919a0a6SAlan Cox return ad->horkage; 4446539cc7c7SJeff Garzik if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) 44476919a0a6SAlan Cox return ad->horkage; 4448c6fd2807SJeff Garzik } 44496919a0a6SAlan Cox ad++; 4450c6fd2807SJeff Garzik } 4451c6fd2807SJeff Garzik return 0; 4452c6fd2807SJeff Garzik } 4453c6fd2807SJeff Garzik 44546919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 44556919a0a6SAlan Cox { 44566919a0a6SAlan Cox /* We don't support polling DMA. 44576919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 44586919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 44596919a0a6SAlan Cox */ 44609af5c9c9STejun Heo if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 44616919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 44626919a0a6SAlan Cox return 1; 446375683fe7STejun Heo return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 44646919a0a6SAlan Cox } 44656919a0a6SAlan Cox 4466c6fd2807SJeff Garzik /** 44676bbfd53dSAlan Cox * ata_is_40wire - check drive side detection 44686bbfd53dSAlan Cox * @dev: device 44696bbfd53dSAlan Cox * 44706bbfd53dSAlan Cox * Perform drive side detection decoding, allowing for device vendors 44716bbfd53dSAlan Cox * who can't follow the documentation. 44726bbfd53dSAlan Cox */ 44736bbfd53dSAlan Cox 44746bbfd53dSAlan Cox static int ata_is_40wire(struct ata_device *dev) 44756bbfd53dSAlan Cox { 44766bbfd53dSAlan Cox if (dev->horkage & ATA_HORKAGE_IVB) 44776bbfd53dSAlan Cox return ata_drive_40wire_relaxed(dev->id); 44786bbfd53dSAlan Cox return ata_drive_40wire(dev->id); 44796bbfd53dSAlan Cox } 44806bbfd53dSAlan Cox 44816bbfd53dSAlan Cox /** 4482c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 4483c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 4484c6fd2807SJeff Garzik * 4485c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 4486c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 4487c6fd2807SJeff Garzik * known limits including host controller limits, device 4488c6fd2807SJeff Garzik * blacklist, etc... 4489c6fd2807SJeff Garzik * 4490c6fd2807SJeff Garzik * LOCKING: 4491c6fd2807SJeff Garzik * None. 4492c6fd2807SJeff Garzik */ 4493c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 4494c6fd2807SJeff Garzik { 44959af5c9c9STejun Heo struct ata_link *link = dev->link; 44969af5c9c9STejun Heo struct ata_port *ap = link->ap; 4497cca3974eSJeff Garzik struct ata_host *host = ap->host; 4498c6fd2807SJeff Garzik unsigned long xfer_mask; 4499c6fd2807SJeff Garzik 4500c6fd2807SJeff Garzik /* controller modes available */ 4501c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 4502c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 4503c6fd2807SJeff Garzik 45048343f889SRobert Hancock /* drive modes available */ 4505c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4506c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 4507c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 4508c6fd2807SJeff Garzik 4509b352e57dSAlan Cox /* 4510b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 4511b352e57dSAlan Cox * cable 4512b352e57dSAlan Cox */ 4513b352e57dSAlan Cox if (ata_dev_pair(dev)) { 4514b352e57dSAlan Cox /* No PIO5 or PIO6 */ 4515b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4516b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 4517b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4518b352e57dSAlan Cox } 4519b352e57dSAlan Cox 4520c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 4521c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4522c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 4523c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 4524c6fd2807SJeff Garzik } 4525c6fd2807SJeff Garzik 452614d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 452714d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 4528c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4529c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 4530c6fd2807SJeff Garzik "other device, disabling DMA\n"); 4531c6fd2807SJeff Garzik } 4532c6fd2807SJeff Garzik 4533e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 4534e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 4535e424675fSJeff Garzik 4536c6fd2807SJeff Garzik if (ap->ops->mode_filter) 4537a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4538c6fd2807SJeff Garzik 45398343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 45408343f889SRobert Hancock * we handle hot plug the cable type can itself change. 45418343f889SRobert Hancock * Check this last so that we know if the transfer rate was 45428343f889SRobert Hancock * solely limited by the cable. 45438343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 45448343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 45458343f889SRobert Hancock * is used safely for 80 are not checked here. 45468343f889SRobert Hancock */ 45478343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 45488343f889SRobert Hancock /* UDMA/44 or higher would be available */ 45498343f889SRobert Hancock if ((ap->cbl == ATA_CBL_PATA40) || 45506bbfd53dSAlan Cox (ata_is_40wire(dev) && 45518343f889SRobert Hancock (ap->cbl == ATA_CBL_PATA_UNK || 45528343f889SRobert Hancock ap->cbl == ATA_CBL_PATA80))) { 45538343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 45548343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 45558343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 45568343f889SRobert Hancock } 45578343f889SRobert Hancock 4558c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4559c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 4560c6fd2807SJeff Garzik } 4561c6fd2807SJeff Garzik 4562c6fd2807SJeff Garzik /** 4563c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4564c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4565c6fd2807SJeff Garzik * 4566c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 4567c6fd2807SJeff Garzik * on port @ap. 4568c6fd2807SJeff Garzik * 4569c6fd2807SJeff Garzik * LOCKING: 4570c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 4571c6fd2807SJeff Garzik * 4572c6fd2807SJeff Garzik * RETURNS: 4573c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4574c6fd2807SJeff Garzik */ 4575c6fd2807SJeff Garzik 4576c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4577c6fd2807SJeff Garzik { 4578c6fd2807SJeff Garzik struct ata_taskfile tf; 4579c6fd2807SJeff Garzik unsigned int err_mask; 4580c6fd2807SJeff Garzik 4581c6fd2807SJeff Garzik /* set up set-features taskfile */ 4582c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 4583c6fd2807SJeff Garzik 4584464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 4585464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 4586464cf177STejun Heo */ 4587c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4588c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 4589c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 4590464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4591c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4592b9f8ab2dSAlan Cox /* If we are using IORDY we must send the mode setting command */ 4593b9f8ab2dSAlan Cox if (ata_pio_need_iordy(dev)) 4594c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 4595b9f8ab2dSAlan Cox /* If the device has IORDY and the controller does not - turn it off */ 4596b9f8ab2dSAlan Cox else if (ata_id_has_iordy(dev->id)) 4597b9f8ab2dSAlan Cox tf.nsect = 0x01; 4598b9f8ab2dSAlan Cox else /* In the ancient relic department - skip all of this */ 4599b9f8ab2dSAlan Cox return 0; 4600c6fd2807SJeff Garzik 46012b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4602c6fd2807SJeff Garzik 4603c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4604c6fd2807SJeff Garzik return err_mask; 4605c6fd2807SJeff Garzik } 4606c6fd2807SJeff Garzik /** 4607218f3d30SJeff Garzik * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES 46089f45cbd3SKristen Carlson Accardi * @dev: Device to which command will be sent 46099f45cbd3SKristen Carlson Accardi * @enable: Whether to enable or disable the feature 4610218f3d30SJeff Garzik * @feature: The sector count represents the feature to set 46119f45cbd3SKristen Carlson Accardi * 46129f45cbd3SKristen Carlson Accardi * Issue SET FEATURES - SATA FEATURES command to device @dev 4613218f3d30SJeff Garzik * on port @ap with sector count 46149f45cbd3SKristen Carlson Accardi * 46159f45cbd3SKristen Carlson Accardi * LOCKING: 46169f45cbd3SKristen Carlson Accardi * PCI/etc. bus probe sem. 46179f45cbd3SKristen Carlson Accardi * 46189f45cbd3SKristen Carlson Accardi * RETURNS: 46199f45cbd3SKristen Carlson Accardi * 0 on success, AC_ERR_* mask otherwise. 46209f45cbd3SKristen Carlson Accardi */ 4621218f3d30SJeff Garzik static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, 4622218f3d30SJeff Garzik u8 feature) 46239f45cbd3SKristen Carlson Accardi { 46249f45cbd3SKristen Carlson Accardi struct ata_taskfile tf; 46259f45cbd3SKristen Carlson Accardi unsigned int err_mask; 46269f45cbd3SKristen Carlson Accardi 46279f45cbd3SKristen Carlson Accardi /* set up set-features taskfile */ 46289f45cbd3SKristen Carlson Accardi DPRINTK("set features - SATA features\n"); 46299f45cbd3SKristen Carlson Accardi 46309f45cbd3SKristen Carlson Accardi ata_tf_init(dev, &tf); 46319f45cbd3SKristen Carlson Accardi tf.command = ATA_CMD_SET_FEATURES; 46329f45cbd3SKristen Carlson Accardi tf.feature = enable; 46339f45cbd3SKristen Carlson Accardi tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 46349f45cbd3SKristen Carlson Accardi tf.protocol = ATA_PROT_NODATA; 4635218f3d30SJeff Garzik tf.nsect = feature; 46369f45cbd3SKristen Carlson Accardi 46372b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 46389f45cbd3SKristen Carlson Accardi 46399f45cbd3SKristen Carlson Accardi DPRINTK("EXIT, err_mask=%x\n", err_mask); 46409f45cbd3SKristen Carlson Accardi return err_mask; 46419f45cbd3SKristen Carlson Accardi } 46429f45cbd3SKristen Carlson Accardi 46439f45cbd3SKristen Carlson Accardi /** 4644c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 4645c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4646c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 4647c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 4648c6fd2807SJeff Garzik * 4649c6fd2807SJeff Garzik * LOCKING: 4650c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4651c6fd2807SJeff Garzik * 4652c6fd2807SJeff Garzik * RETURNS: 4653c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4654c6fd2807SJeff Garzik */ 4655c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 4656c6fd2807SJeff Garzik u16 heads, u16 sectors) 4657c6fd2807SJeff Garzik { 4658c6fd2807SJeff Garzik struct ata_taskfile tf; 4659c6fd2807SJeff Garzik unsigned int err_mask; 4660c6fd2807SJeff Garzik 4661c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 4662c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4663c6fd2807SJeff Garzik return AC_ERR_INVALID; 4664c6fd2807SJeff Garzik 4665c6fd2807SJeff Garzik /* set up init dev params taskfile */ 4666c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 4667c6fd2807SJeff Garzik 4668c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4669c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 4670c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4671c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4672c6fd2807SJeff Garzik tf.nsect = sectors; 4673c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4674c6fd2807SJeff Garzik 46752b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 467618b2466cSAlan Cox /* A clean abort indicates an original or just out of spec drive 467718b2466cSAlan Cox and we should continue as we issue the setup based on the 467818b2466cSAlan Cox drive reported working geometry */ 467918b2466cSAlan Cox if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 468018b2466cSAlan Cox err_mask = 0; 4681c6fd2807SJeff Garzik 4682c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4683c6fd2807SJeff Garzik return err_mask; 4684c6fd2807SJeff Garzik } 4685c6fd2807SJeff Garzik 4686c6fd2807SJeff Garzik /** 4687c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 4688c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 4689c6fd2807SJeff Garzik * 4690c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 4691c6fd2807SJeff Garzik * 4692c6fd2807SJeff Garzik * LOCKING: 4693cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4694c6fd2807SJeff Garzik */ 469570e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 4696c6fd2807SJeff Garzik { 4697c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4698ff2aeb1eSTejun Heo struct scatterlist *sg = qc->sg; 4699c6fd2807SJeff Garzik int dir = qc->dma_dir; 4700c6fd2807SJeff Garzik 4701c6fd2807SJeff Garzik WARN_ON(sg == NULL); 4702c6fd2807SJeff Garzik 4703dde20207SJames Bottomley VPRINTK("unmapping %u sg elements\n", qc->n_elem); 4704c6fd2807SJeff Garzik 4705dde20207SJames Bottomley if (qc->n_elem) 4706dde20207SJames Bottomley dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 4707c6fd2807SJeff Garzik 4708c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4709ff2aeb1eSTejun Heo qc->sg = NULL; 4710c6fd2807SJeff Garzik } 4711c6fd2807SJeff Garzik 4712c6fd2807SJeff Garzik /** 4713c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 4714c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 4715c6fd2807SJeff Garzik * 4716c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 4717c6fd2807SJeff Garzik * associated with the current disk command. 4718c6fd2807SJeff Garzik * 4719c6fd2807SJeff Garzik * LOCKING: 4720cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4721c6fd2807SJeff Garzik * 4722c6fd2807SJeff Garzik */ 4723c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 4724c6fd2807SJeff Garzik { 4725c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4726c6fd2807SJeff Garzik struct scatterlist *sg; 4727ff2aeb1eSTejun Heo unsigned int si, pi; 4728c6fd2807SJeff Garzik 4729ff2aeb1eSTejun Heo pi = 0; 4730ff2aeb1eSTejun Heo for_each_sg(qc->sg, sg, qc->n_elem, si) { 4731c6fd2807SJeff Garzik u32 addr, offset; 4732c6fd2807SJeff Garzik u32 sg_len, len; 4733c6fd2807SJeff Garzik 4734c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 4735c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 4736c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 4737c6fd2807SJeff Garzik */ 4738c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 4739c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 4740c6fd2807SJeff Garzik 4741c6fd2807SJeff Garzik while (sg_len) { 4742c6fd2807SJeff Garzik offset = addr & 0xffff; 4743c6fd2807SJeff Garzik len = sg_len; 4744c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 4745c6fd2807SJeff Garzik len = 0x10000 - offset; 4746c6fd2807SJeff Garzik 4747ff2aeb1eSTejun Heo ap->prd[pi].addr = cpu_to_le32(addr); 4748ff2aeb1eSTejun Heo ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff); 4749ff2aeb1eSTejun Heo VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); 4750c6fd2807SJeff Garzik 4751ff2aeb1eSTejun Heo pi++; 4752c6fd2807SJeff Garzik sg_len -= len; 4753c6fd2807SJeff Garzik addr += len; 4754c6fd2807SJeff Garzik } 4755c6fd2807SJeff Garzik } 4756c6fd2807SJeff Garzik 4757ff2aeb1eSTejun Heo ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4758c6fd2807SJeff Garzik } 4759b9a4197eSTejun Heo 4760c6fd2807SJeff Garzik /** 4761d26fc955SAlan Cox * ata_fill_sg_dumb - Fill PCI IDE PRD table 4762d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be transferred 4763d26fc955SAlan Cox * 4764d26fc955SAlan Cox * Fill PCI IDE PRD (scatter-gather) table with segments 4765d26fc955SAlan Cox * associated with the current disk command. Perform the fill 4766d26fc955SAlan Cox * so that we avoid writing any length 64K records for 4767d26fc955SAlan Cox * controllers that don't follow the spec. 4768d26fc955SAlan Cox * 4769d26fc955SAlan Cox * LOCKING: 4770d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4771d26fc955SAlan Cox * 4772d26fc955SAlan Cox */ 4773d26fc955SAlan Cox static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) 4774d26fc955SAlan Cox { 4775d26fc955SAlan Cox struct ata_port *ap = qc->ap; 4776d26fc955SAlan Cox struct scatterlist *sg; 4777ff2aeb1eSTejun Heo unsigned int si, pi; 4778d26fc955SAlan Cox 4779ff2aeb1eSTejun Heo pi = 0; 4780ff2aeb1eSTejun Heo for_each_sg(qc->sg, sg, qc->n_elem, si) { 4781d26fc955SAlan Cox u32 addr, offset; 4782d26fc955SAlan Cox u32 sg_len, len, blen; 4783d26fc955SAlan Cox 4784d26fc955SAlan Cox /* determine if physical DMA addr spans 64K boundary. 4785d26fc955SAlan Cox * Note h/w doesn't support 64-bit, so we unconditionally 4786d26fc955SAlan Cox * truncate dma_addr_t to u32. 4787d26fc955SAlan Cox */ 4788d26fc955SAlan Cox addr = (u32) sg_dma_address(sg); 4789d26fc955SAlan Cox sg_len = sg_dma_len(sg); 4790d26fc955SAlan Cox 4791d26fc955SAlan Cox while (sg_len) { 4792d26fc955SAlan Cox offset = addr & 0xffff; 4793d26fc955SAlan Cox len = sg_len; 4794d26fc955SAlan Cox if ((offset + sg_len) > 0x10000) 4795d26fc955SAlan Cox len = 0x10000 - offset; 4796d26fc955SAlan Cox 4797d26fc955SAlan Cox blen = len & 0xffff; 4798ff2aeb1eSTejun Heo ap->prd[pi].addr = cpu_to_le32(addr); 4799d26fc955SAlan Cox if (blen == 0) { 4800d26fc955SAlan Cox /* Some PATA chipsets like the CS5530 can't 4801d26fc955SAlan Cox cope with 0x0000 meaning 64K as the spec says */ 4802ff2aeb1eSTejun Heo ap->prd[pi].flags_len = cpu_to_le32(0x8000); 4803d26fc955SAlan Cox blen = 0x8000; 4804ff2aeb1eSTejun Heo ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000); 4805d26fc955SAlan Cox } 4806ff2aeb1eSTejun Heo ap->prd[pi].flags_len = cpu_to_le32(blen); 4807ff2aeb1eSTejun Heo VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); 4808d26fc955SAlan Cox 4809ff2aeb1eSTejun Heo pi++; 4810d26fc955SAlan Cox sg_len -= len; 4811d26fc955SAlan Cox addr += len; 4812d26fc955SAlan Cox } 4813d26fc955SAlan Cox } 4814d26fc955SAlan Cox 4815ff2aeb1eSTejun Heo ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4816d26fc955SAlan Cox } 4817d26fc955SAlan Cox 4818d26fc955SAlan Cox /** 4819c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 4820c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4821c6fd2807SJeff Garzik * 4822c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4823c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4824c6fd2807SJeff Garzik * supplied PACKET command. 4825c6fd2807SJeff Garzik * 4826c6fd2807SJeff Garzik * LOCKING: 4827cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4828c6fd2807SJeff Garzik * 4829c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4830c6fd2807SJeff Garzik * nonzero otherwise 4831c6fd2807SJeff Garzik */ 4832c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 4833c6fd2807SJeff Garzik { 4834c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4835c6fd2807SJeff Garzik 4836b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4837b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4838b9a4197eSTejun Heo */ 4839b9a4197eSTejun Heo if (unlikely(qc->nbytes & 15)) 48406f23a31dSAlbert Lee return 1; 48416f23a31dSAlbert Lee 4842c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4843b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4844c6fd2807SJeff Garzik 4845b9a4197eSTejun Heo return 0; 4846c6fd2807SJeff Garzik } 4847b9a4197eSTejun Heo 4848c6fd2807SJeff Garzik /** 484931cc23b3STejun Heo * ata_std_qc_defer - Check whether a qc needs to be deferred 485031cc23b3STejun Heo * @qc: ATA command in question 485131cc23b3STejun Heo * 485231cc23b3STejun Heo * Non-NCQ commands cannot run with any other command, NCQ or 485331cc23b3STejun Heo * not. As upper layer only knows the queue depth, we are 485431cc23b3STejun Heo * responsible for maintaining exclusion. This function checks 485531cc23b3STejun Heo * whether a new command @qc can be issued. 485631cc23b3STejun Heo * 485731cc23b3STejun Heo * LOCKING: 485831cc23b3STejun Heo * spin_lock_irqsave(host lock) 485931cc23b3STejun Heo * 486031cc23b3STejun Heo * RETURNS: 486131cc23b3STejun Heo * ATA_DEFER_* if deferring is needed, 0 otherwise. 486231cc23b3STejun Heo */ 486331cc23b3STejun Heo int ata_std_qc_defer(struct ata_queued_cmd *qc) 486431cc23b3STejun Heo { 486531cc23b3STejun Heo struct ata_link *link = qc->dev->link; 486631cc23b3STejun Heo 486731cc23b3STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 486831cc23b3STejun Heo if (!ata_tag_valid(link->active_tag)) 486931cc23b3STejun Heo return 0; 487031cc23b3STejun Heo } else { 487131cc23b3STejun Heo if (!ata_tag_valid(link->active_tag) && !link->sactive) 487231cc23b3STejun Heo return 0; 487331cc23b3STejun Heo } 487431cc23b3STejun Heo 487531cc23b3STejun Heo return ATA_DEFER_LINK; 487631cc23b3STejun Heo } 487731cc23b3STejun Heo 487831cc23b3STejun Heo /** 4879c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 4880c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 4881c6fd2807SJeff Garzik * 4882c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 4883c6fd2807SJeff Garzik * 4884c6fd2807SJeff Garzik * LOCKING: 4885cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4886c6fd2807SJeff Garzik */ 4887c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 4888c6fd2807SJeff Garzik { 4889c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4890c6fd2807SJeff Garzik return; 4891c6fd2807SJeff Garzik 4892c6fd2807SJeff Garzik ata_fill_sg(qc); 4893c6fd2807SJeff Garzik } 4894c6fd2807SJeff Garzik 4895d26fc955SAlan Cox /** 4896d26fc955SAlan Cox * ata_dumb_qc_prep - Prepare taskfile for submission 4897d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be prepared 4898d26fc955SAlan Cox * 4899d26fc955SAlan Cox * Prepare ATA taskfile for submission. 4900d26fc955SAlan Cox * 4901d26fc955SAlan Cox * LOCKING: 4902d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4903d26fc955SAlan Cox */ 4904d26fc955SAlan Cox void ata_dumb_qc_prep(struct ata_queued_cmd *qc) 4905d26fc955SAlan Cox { 4906d26fc955SAlan Cox if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4907d26fc955SAlan Cox return; 4908d26fc955SAlan Cox 4909d26fc955SAlan Cox ata_fill_sg_dumb(qc); 4910d26fc955SAlan Cox } 4911d26fc955SAlan Cox 4912c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4913c6fd2807SJeff Garzik 4914c6fd2807SJeff Garzik /** 4915c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4916c6fd2807SJeff Garzik * @qc: Command to be associated 4917c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4918c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4919c6fd2807SJeff Garzik * 4920c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4921c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4922c6fd2807SJeff Garzik * elements. 4923c6fd2807SJeff Garzik * 4924c6fd2807SJeff Garzik * LOCKING: 4925cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4926c6fd2807SJeff Garzik */ 4927c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4928c6fd2807SJeff Garzik unsigned int n_elem) 4929c6fd2807SJeff Garzik { 4930ff2aeb1eSTejun Heo qc->sg = sg; 4931c6fd2807SJeff Garzik qc->n_elem = n_elem; 4932ff2aeb1eSTejun Heo qc->cursg = qc->sg; 4933ff2aeb1eSTejun Heo } 4934ff2aeb1eSTejun Heo 4935c6fd2807SJeff Garzik /** 4936c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4937c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4938c6fd2807SJeff Garzik * 4939c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4940c6fd2807SJeff Garzik * 4941c6fd2807SJeff Garzik * LOCKING: 4942cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4943c6fd2807SJeff Garzik * 4944c6fd2807SJeff Garzik * RETURNS: 4945c6fd2807SJeff Garzik * Zero on success, negative on error. 4946c6fd2807SJeff Garzik * 4947c6fd2807SJeff Garzik */ 4948c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4949c6fd2807SJeff Garzik { 4950c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4951dde20207SJames Bottomley unsigned int n_elem; 4952c6fd2807SJeff Garzik 495344877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4954c6fd2807SJeff Garzik 4955dde20207SJames Bottomley n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4956dde20207SJames Bottomley if (n_elem < 1) 4957c6fd2807SJeff Garzik return -1; 4958c6fd2807SJeff Garzik 4959dde20207SJames Bottomley DPRINTK("%d sg elements mapped\n", n_elem); 4960dde20207SJames Bottomley 4961dde20207SJames Bottomley qc->n_elem = n_elem; 4962f92a2636STejun Heo qc->flags |= ATA_QCFLAG_DMAMAP; 4963c6fd2807SJeff Garzik 4964c6fd2807SJeff Garzik return 0; 4965c6fd2807SJeff Garzik } 4966c6fd2807SJeff Garzik 4967c6fd2807SJeff Garzik /** 4968c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4969c6fd2807SJeff Garzik * @buf: Buffer to swap 4970c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4971c6fd2807SJeff Garzik * 4972c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4973c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4974c6fd2807SJeff Garzik * vice-versa. 4975c6fd2807SJeff Garzik * 4976c6fd2807SJeff Garzik * LOCKING: 4977c6fd2807SJeff Garzik * Inherited from caller. 4978c6fd2807SJeff Garzik */ 4979c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4980c6fd2807SJeff Garzik { 4981c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4982c6fd2807SJeff Garzik unsigned int i; 4983c6fd2807SJeff Garzik 4984c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4985c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4986c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4987c6fd2807SJeff Garzik } 4988c6fd2807SJeff Garzik 4989c6fd2807SJeff Garzik /** 49900d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 499155dba312STejun Heo * @dev: device to target 4992c6fd2807SJeff Garzik * @buf: data buffer 4993c6fd2807SJeff Garzik * @buflen: buffer length 49940affa456SLinus Nilsson * @rw: read/write 4995c6fd2807SJeff Garzik * 4996c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 4997c6fd2807SJeff Garzik * 4998c6fd2807SJeff Garzik * LOCKING: 4999c6fd2807SJeff Garzik * Inherited from caller. 500055dba312STejun Heo * 500155dba312STejun Heo * RETURNS: 500255dba312STejun Heo * Bytes consumed. 5003c6fd2807SJeff Garzik */ 500455dba312STejun Heo unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf, 500555dba312STejun Heo unsigned int buflen, int rw) 5006c6fd2807SJeff Garzik { 500755dba312STejun Heo struct ata_port *ap = dev->link->ap; 500855dba312STejun Heo void __iomem *data_addr = ap->ioaddr.data_addr; 5009c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 5010c6fd2807SJeff Garzik 5011c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 501255dba312STejun Heo if (rw == READ) 501355dba312STejun Heo ioread16_rep(data_addr, buf, words); 5014c6fd2807SJeff Garzik else 501555dba312STejun Heo iowrite16_rep(data_addr, buf, words); 5016c6fd2807SJeff Garzik 5017c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 5018c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 50194ca4e439SAl Viro __le16 align_buf[1] = { 0 }; 5020c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 5021c6fd2807SJeff Garzik 502255dba312STejun Heo if (rw == READ) { 502355dba312STejun Heo align_buf[0] = cpu_to_le16(ioread16(data_addr)); 5024c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 502555dba312STejun Heo } else { 502655dba312STejun Heo memcpy(align_buf, trailing_buf, 1); 502755dba312STejun Heo iowrite16(le16_to_cpu(align_buf[0]), data_addr); 5028c6fd2807SJeff Garzik } 502955dba312STejun Heo words++; 5030c6fd2807SJeff Garzik } 503155dba312STejun Heo 503255dba312STejun Heo return words << 1; 5033c6fd2807SJeff Garzik } 5034c6fd2807SJeff Garzik 5035c6fd2807SJeff Garzik /** 50360d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 503755dba312STejun Heo * @dev: device to target 5038c6fd2807SJeff Garzik * @buf: data buffer 5039c6fd2807SJeff Garzik * @buflen: buffer length 50400affa456SLinus Nilsson * @rw: read/write 5041c6fd2807SJeff Garzik * 5042c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 5043c6fd2807SJeff Garzik * transfer with interrupts disabled. 5044c6fd2807SJeff Garzik * 5045c6fd2807SJeff Garzik * LOCKING: 5046c6fd2807SJeff Garzik * Inherited from caller. 504755dba312STejun Heo * 504855dba312STejun Heo * RETURNS: 504955dba312STejun Heo * Bytes consumed. 5050c6fd2807SJeff Garzik */ 505155dba312STejun Heo unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, 505255dba312STejun Heo unsigned int buflen, int rw) 5053c6fd2807SJeff Garzik { 5054c6fd2807SJeff Garzik unsigned long flags; 505555dba312STejun Heo unsigned int consumed; 505655dba312STejun Heo 5057c6fd2807SJeff Garzik local_irq_save(flags); 505855dba312STejun Heo consumed = ata_data_xfer(dev, buf, buflen, rw); 5059c6fd2807SJeff Garzik local_irq_restore(flags); 506055dba312STejun Heo 506155dba312STejun Heo return consumed; 5062c6fd2807SJeff Garzik } 5063c6fd2807SJeff Garzik 5064c6fd2807SJeff Garzik 5065c6fd2807SJeff Garzik /** 50665a5dbd18SMark Lord * ata_pio_sector - Transfer a sector of data. 5067c6fd2807SJeff Garzik * @qc: Command on going 5068c6fd2807SJeff Garzik * 50695a5dbd18SMark Lord * Transfer qc->sect_size bytes of data from/to the ATA device. 5070c6fd2807SJeff Garzik * 5071c6fd2807SJeff Garzik * LOCKING: 5072c6fd2807SJeff Garzik * Inherited from caller. 5073c6fd2807SJeff Garzik */ 5074c6fd2807SJeff Garzik 5075c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 5076c6fd2807SJeff Garzik { 5077c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 5078c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5079c6fd2807SJeff Garzik struct page *page; 5080c6fd2807SJeff Garzik unsigned int offset; 5081c6fd2807SJeff Garzik unsigned char *buf; 5082c6fd2807SJeff Garzik 50835a5dbd18SMark Lord if (qc->curbytes == qc->nbytes - qc->sect_size) 5084c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5085c6fd2807SJeff Garzik 508645711f1aSJens Axboe page = sg_page(qc->cursg); 508787260216SJens Axboe offset = qc->cursg->offset + qc->cursg_ofs; 5088c6fd2807SJeff Garzik 5089c6fd2807SJeff Garzik /* get the current page and offset */ 5090c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 5091c6fd2807SJeff Garzik offset %= PAGE_SIZE; 5092c6fd2807SJeff Garzik 5093c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 5094c6fd2807SJeff Garzik 5095c6fd2807SJeff Garzik if (PageHighMem(page)) { 5096c6fd2807SJeff Garzik unsigned long flags; 5097c6fd2807SJeff Garzik 5098c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 5099c6fd2807SJeff Garzik local_irq_save(flags); 5100c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 5101c6fd2807SJeff Garzik 5102c6fd2807SJeff Garzik /* do the actual data transfer */ 51035a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 5104c6fd2807SJeff Garzik 5105c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 5106c6fd2807SJeff Garzik local_irq_restore(flags); 5107c6fd2807SJeff Garzik } else { 5108c6fd2807SJeff Garzik buf = page_address(page); 51095a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 5110c6fd2807SJeff Garzik } 5111c6fd2807SJeff Garzik 51125a5dbd18SMark Lord qc->curbytes += qc->sect_size; 51135a5dbd18SMark Lord qc->cursg_ofs += qc->sect_size; 5114c6fd2807SJeff Garzik 511587260216SJens Axboe if (qc->cursg_ofs == qc->cursg->length) { 511687260216SJens Axboe qc->cursg = sg_next(qc->cursg); 5117c6fd2807SJeff Garzik qc->cursg_ofs = 0; 5118c6fd2807SJeff Garzik } 5119c6fd2807SJeff Garzik } 5120c6fd2807SJeff Garzik 5121c6fd2807SJeff Garzik /** 51225a5dbd18SMark Lord * ata_pio_sectors - Transfer one or many sectors. 5123c6fd2807SJeff Garzik * @qc: Command on going 5124c6fd2807SJeff Garzik * 51255a5dbd18SMark Lord * Transfer one or many sectors of data from/to the 5126c6fd2807SJeff Garzik * ATA device for the DRQ request. 5127c6fd2807SJeff Garzik * 5128c6fd2807SJeff Garzik * LOCKING: 5129c6fd2807SJeff Garzik * Inherited from caller. 5130c6fd2807SJeff Garzik */ 5131c6fd2807SJeff Garzik 5132c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 5133c6fd2807SJeff Garzik { 5134c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 5135c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 5136c6fd2807SJeff Garzik unsigned int nsect; 5137c6fd2807SJeff Garzik 5138c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 5139c6fd2807SJeff Garzik 51405a5dbd18SMark Lord nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, 5141726f0785STejun Heo qc->dev->multi_count); 5142c6fd2807SJeff Garzik while (nsect--) 5143c6fd2807SJeff Garzik ata_pio_sector(qc); 5144c6fd2807SJeff Garzik } else 5145c6fd2807SJeff Garzik ata_pio_sector(qc); 51464cc980b3SAlbert Lee 51474cc980b3SAlbert Lee ata_altstatus(qc->ap); /* flush */ 5148c6fd2807SJeff Garzik } 5149c6fd2807SJeff Garzik 5150c6fd2807SJeff Garzik /** 5151c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 5152c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 5153c6fd2807SJeff Garzik * @qc: Taskfile currently active 5154c6fd2807SJeff Garzik * 5155c6fd2807SJeff Garzik * When device has indicated its readiness to accept 5156c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 5157c6fd2807SJeff Garzik * 5158c6fd2807SJeff Garzik * LOCKING: 5159c6fd2807SJeff Garzik * caller. 5160c6fd2807SJeff Garzik */ 5161c6fd2807SJeff Garzik 5162c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 5163c6fd2807SJeff Garzik { 5164c6fd2807SJeff Garzik /* send SCSI cdb */ 5165c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 5166c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 5167c6fd2807SJeff Garzik 5168c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 5169c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 5170c6fd2807SJeff Garzik 5171c6fd2807SJeff Garzik switch (qc->tf.protocol) { 51720dc36888STejun Heo case ATAPI_PROT_PIO: 5173c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5174c6fd2807SJeff Garzik break; 51750dc36888STejun Heo case ATAPI_PROT_NODATA: 5176c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5177c6fd2807SJeff Garzik break; 51780dc36888STejun Heo case ATAPI_PROT_DMA: 5179c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5180c6fd2807SJeff Garzik /* initiate bmdma */ 5181c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 5182c6fd2807SJeff Garzik break; 5183c6fd2807SJeff Garzik } 5184c6fd2807SJeff Garzik } 5185c6fd2807SJeff Garzik 5186c6fd2807SJeff Garzik /** 5187c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 5188c6fd2807SJeff Garzik * @qc: Command on going 5189c6fd2807SJeff Garzik * @bytes: number of bytes 5190c6fd2807SJeff Garzik * 5191c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 5192c6fd2807SJeff Garzik * 5193c6fd2807SJeff Garzik * LOCKING: 5194c6fd2807SJeff Garzik * Inherited from caller. 5195c6fd2807SJeff Garzik * 5196c6fd2807SJeff Garzik */ 5197140b5e59STejun Heo static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 5198c6fd2807SJeff Garzik { 519956c819dfSTejun Heo int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; 5200c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 520156c819dfSTejun Heo struct ata_device *dev = qc->dev; 520256c819dfSTejun Heo struct ata_eh_info *ehi = &dev->link->eh_info; 5203140b5e59STejun Heo struct scatterlist *sg; 5204c6fd2807SJeff Garzik struct page *page; 5205c6fd2807SJeff Garzik unsigned char *buf; 520656c819dfSTejun Heo unsigned int offset, count, consumed; 5207c6fd2807SJeff Garzik 5208c6fd2807SJeff Garzik next_sg: 5209140b5e59STejun Heo sg = qc->cursg; 5210140b5e59STejun Heo if (unlikely(!sg)) { 5211fa2fc7f4SJames Bottomley ata_ehi_push_desc(ehi, "unexpected or too much trailing data " 5212140b5e59STejun Heo "buf=%u cur=%u bytes=%u", 5213140b5e59STejun Heo qc->nbytes, qc->curbytes, bytes); 5214140b5e59STejun Heo return -1; 5215c6fd2807SJeff Garzik } 5216c6fd2807SJeff Garzik 521745711f1aSJens Axboe page = sg_page(sg); 5218c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 5219c6fd2807SJeff Garzik 5220c6fd2807SJeff Garzik /* get the current page and offset */ 5221c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 5222c6fd2807SJeff Garzik offset %= PAGE_SIZE; 5223c6fd2807SJeff Garzik 5224c6fd2807SJeff Garzik /* don't overrun current sg */ 5225c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 5226c6fd2807SJeff Garzik 5227c6fd2807SJeff Garzik /* don't cross page boundaries */ 5228c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 5229c6fd2807SJeff Garzik 5230c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 5231c6fd2807SJeff Garzik 5232c6fd2807SJeff Garzik if (PageHighMem(page)) { 5233c6fd2807SJeff Garzik unsigned long flags; 5234c6fd2807SJeff Garzik 5235c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 5236c6fd2807SJeff Garzik local_irq_save(flags); 5237c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 5238c6fd2807SJeff Garzik 5239c6fd2807SJeff Garzik /* do the actual data transfer */ 524056c819dfSTejun Heo consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); 5241c6fd2807SJeff Garzik 5242c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 5243c6fd2807SJeff Garzik local_irq_restore(flags); 5244c6fd2807SJeff Garzik } else { 5245c6fd2807SJeff Garzik buf = page_address(page); 524656c819dfSTejun Heo consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); 5247c6fd2807SJeff Garzik } 5248c6fd2807SJeff Garzik 524956c819dfSTejun Heo bytes -= min(bytes, consumed); 5250c6fd2807SJeff Garzik qc->curbytes += count; 5251c6fd2807SJeff Garzik qc->cursg_ofs += count; 5252c6fd2807SJeff Garzik 5253c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 525487260216SJens Axboe qc->cursg = sg_next(qc->cursg); 5255c6fd2807SJeff Garzik qc->cursg_ofs = 0; 5256c6fd2807SJeff Garzik } 5257c6fd2807SJeff Garzik 525856c819dfSTejun Heo /* consumed can be larger than count only for the last transfer */ 525956c819dfSTejun Heo WARN_ON(qc->cursg && count != consumed); 526056c819dfSTejun Heo 5261c6fd2807SJeff Garzik if (bytes) 5262c6fd2807SJeff Garzik goto next_sg; 5263140b5e59STejun Heo return 0; 5264c6fd2807SJeff Garzik } 5265c6fd2807SJeff Garzik 5266c6fd2807SJeff Garzik /** 5267c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 5268c6fd2807SJeff Garzik * @qc: Command on going 5269c6fd2807SJeff Garzik * 5270c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 5271c6fd2807SJeff Garzik * 5272c6fd2807SJeff Garzik * LOCKING: 5273c6fd2807SJeff Garzik * Inherited from caller. 5274c6fd2807SJeff Garzik */ 5275c6fd2807SJeff Garzik 5276c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 5277c6fd2807SJeff Garzik { 5278c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5279c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 528056c819dfSTejun Heo struct ata_eh_info *ehi = &dev->link->eh_info; 5281c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 5282c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 5283c6fd2807SJeff Garzik 5284c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 5285c6fd2807SJeff Garzik * here to save some kernel stack usage. 5286c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 5287c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 5288c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 5289c6fd2807SJeff Garzik */ 5290c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 5291c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 5292c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 5293c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 5294c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 5295c6fd2807SJeff Garzik 5296c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 52970106372dSAlbert Lee if (unlikely(ireason & (1 << 0))) 529856c819dfSTejun Heo goto atapi_check; 5299c6fd2807SJeff Garzik 5300c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 5301c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 53020106372dSAlbert Lee if (unlikely(do_write != i_write)) 530356c819dfSTejun Heo goto atapi_check; 53040106372dSAlbert Lee 53050106372dSAlbert Lee if (unlikely(!bytes)) 530656c819dfSTejun Heo goto atapi_check; 5307c6fd2807SJeff Garzik 530844877b4eSTejun Heo VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); 5309c6fd2807SJeff Garzik 531056c819dfSTejun Heo if (unlikely(__atapi_pio_bytes(qc, bytes))) 5311140b5e59STejun Heo goto err_out; 53124cc980b3SAlbert Lee ata_altstatus(ap); /* flush */ 5313c6fd2807SJeff Garzik 5314c6fd2807SJeff Garzik return; 5315c6fd2807SJeff Garzik 531656c819dfSTejun Heo atapi_check: 531756c819dfSTejun Heo ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", 531856c819dfSTejun Heo ireason, bytes); 5319c6fd2807SJeff Garzik err_out: 5320c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5321c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5322c6fd2807SJeff Garzik } 5323c6fd2807SJeff Garzik 5324c6fd2807SJeff Garzik /** 5325c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 5326c6fd2807SJeff Garzik * @ap: the target ata_port 5327c6fd2807SJeff Garzik * @qc: qc on going 5328c6fd2807SJeff Garzik * 5329c6fd2807SJeff Garzik * RETURNS: 5330c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 5331c6fd2807SJeff Garzik */ 5332c6fd2807SJeff Garzik 5333c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 5334c6fd2807SJeff Garzik { 5335c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5336c6fd2807SJeff Garzik return 1; 5337c6fd2807SJeff Garzik 5338c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 5339c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 5340c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 5341c6fd2807SJeff Garzik return 1; 5342c6fd2807SJeff Garzik 5343405e66b3STejun Heo if (ata_is_atapi(qc->tf.protocol) && 5344c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5345c6fd2807SJeff Garzik return 1; 5346c6fd2807SJeff Garzik } 5347c6fd2807SJeff Garzik 5348c6fd2807SJeff Garzik return 0; 5349c6fd2807SJeff Garzik } 5350c6fd2807SJeff Garzik 5351c6fd2807SJeff Garzik /** 5352c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 5353c6fd2807SJeff Garzik * @qc: Command to complete 5354c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 5355c6fd2807SJeff Garzik * 5356c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 5357c6fd2807SJeff Garzik * 5358c6fd2807SJeff Garzik * LOCKING: 5359cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 5360c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 5361c6fd2807SJeff Garzik */ 5362c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 5363c6fd2807SJeff Garzik { 5364c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5365c6fd2807SJeff Garzik unsigned long flags; 5366c6fd2807SJeff Garzik 5367c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5368c6fd2807SJeff Garzik if (in_wq) { 5369c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5370c6fd2807SJeff Garzik 5371cca3974eSJeff Garzik /* EH might have kicked in while host lock is 5372cca3974eSJeff Garzik * released. 5373c6fd2807SJeff Garzik */ 5374c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 5375c6fd2807SJeff Garzik if (qc) { 5376c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 537783625006SAkira Iguchi ap->ops->irq_on(ap); 5378c6fd2807SJeff Garzik ata_qc_complete(qc); 5379c6fd2807SJeff Garzik } else 5380c6fd2807SJeff Garzik ata_port_freeze(ap); 5381c6fd2807SJeff Garzik } 5382c6fd2807SJeff Garzik 5383c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5384c6fd2807SJeff Garzik } else { 5385c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 5386c6fd2807SJeff Garzik ata_qc_complete(qc); 5387c6fd2807SJeff Garzik else 5388c6fd2807SJeff Garzik ata_port_freeze(ap); 5389c6fd2807SJeff Garzik } 5390c6fd2807SJeff Garzik } else { 5391c6fd2807SJeff Garzik if (in_wq) { 5392c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 539383625006SAkira Iguchi ap->ops->irq_on(ap); 5394c6fd2807SJeff Garzik ata_qc_complete(qc); 5395c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5396c6fd2807SJeff Garzik } else 5397c6fd2807SJeff Garzik ata_qc_complete(qc); 5398c6fd2807SJeff Garzik } 5399c6fd2807SJeff Garzik } 5400c6fd2807SJeff Garzik 5401c6fd2807SJeff Garzik /** 5402c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 5403c6fd2807SJeff Garzik * @ap: the target ata_port 5404c6fd2807SJeff Garzik * @qc: qc on going 5405c6fd2807SJeff Garzik * @status: current device status 5406c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 5407c6fd2807SJeff Garzik * 5408c6fd2807SJeff Garzik * RETURNS: 5409c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 5410c6fd2807SJeff Garzik */ 5411c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 5412c6fd2807SJeff Garzik u8 status, int in_wq) 5413c6fd2807SJeff Garzik { 5414c6fd2807SJeff Garzik unsigned long flags = 0; 5415c6fd2807SJeff Garzik int poll_next; 5416c6fd2807SJeff Garzik 5417c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 5418c6fd2807SJeff Garzik 5419c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 5420c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 5421c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 5422c6fd2807SJeff Garzik */ 5423c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 5424c6fd2807SJeff Garzik 5425c6fd2807SJeff Garzik fsm_start: 5426c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 542744877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); 5428c6fd2807SJeff Garzik 5429c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5430c6fd2807SJeff Garzik case HSM_ST_FIRST: 5431c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 5432c6fd2807SJeff Garzik 5433c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 5434c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 5435c6fd2807SJeff Garzik * takes over after sending the data. 5436c6fd2807SJeff Garzik */ 5437c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 5438c6fd2807SJeff Garzik 5439c6fd2807SJeff Garzik /* check device status */ 5440c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 5441c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 5442c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 5443c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 5444c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5445c6fd2807SJeff Garzik else 5446c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 5447c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5448c6fd2807SJeff Garzik 5449c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5450c6fd2807SJeff Garzik goto fsm_start; 5451c6fd2807SJeff Garzik } 5452c6fd2807SJeff Garzik 5453c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 5454c6fd2807SJeff Garzik * when it finds something wrong. 5455c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 5456c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 5457c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 5458c6fd2807SJeff Garzik */ 5459c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 54602d3b8eeaSAlbert Lee /* Some ATAPI tape drives forget to clear the ERR bit 54612d3b8eeaSAlbert Lee * when doing the next command (mostly request sense). 54622d3b8eeaSAlbert Lee * We ignore ERR here to workaround and proceed sending 54632d3b8eeaSAlbert Lee * the CDB. 54642d3b8eeaSAlbert Lee */ 54652d3b8eeaSAlbert Lee if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { 54662d3b8eeaSAlbert Lee ata_port_printk(ap, KERN_WARNING, 54672d3b8eeaSAlbert Lee "DRQ=1 with device error, " 54682d3b8eeaSAlbert Lee "dev_stat 0x%X\n", status); 5469c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5470c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5471c6fd2807SJeff Garzik goto fsm_start; 5472c6fd2807SJeff Garzik } 54732d3b8eeaSAlbert Lee } 5474c6fd2807SJeff Garzik 5475c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 5476c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 5477c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 5478c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 5479c6fd2807SJeff Garzik */ 5480c6fd2807SJeff Garzik if (in_wq) 5481c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5482c6fd2807SJeff Garzik 5483c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 5484c6fd2807SJeff Garzik /* PIO data out protocol. 5485c6fd2807SJeff Garzik * send first data block. 5486c6fd2807SJeff Garzik */ 5487c6fd2807SJeff Garzik 5488c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 5489c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 5490c6fd2807SJeff Garzik * before ata_pio_sectors(). 5491c6fd2807SJeff Garzik */ 5492c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5493c6fd2807SJeff Garzik ata_pio_sectors(qc); 5494c6fd2807SJeff Garzik } else 5495c6fd2807SJeff Garzik /* send CDB */ 5496c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 5497c6fd2807SJeff Garzik 5498c6fd2807SJeff Garzik if (in_wq) 5499c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5500c6fd2807SJeff Garzik 5501c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 5502c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 5503c6fd2807SJeff Garzik */ 5504c6fd2807SJeff Garzik break; 5505c6fd2807SJeff Garzik 5506c6fd2807SJeff Garzik case HSM_ST: 5507c6fd2807SJeff Garzik /* complete command or read/write the data register */ 55080dc36888STejun Heo if (qc->tf.protocol == ATAPI_PROT_PIO) { 5509c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 5510c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 5511c6fd2807SJeff Garzik /* No more data to transfer or device error. 5512c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 5513c6fd2807SJeff Garzik */ 5514c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5515c6fd2807SJeff Garzik goto fsm_start; 5516c6fd2807SJeff Garzik } 5517c6fd2807SJeff Garzik 5518c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 5519c6fd2807SJeff Garzik * when it finds something wrong. 5520c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 5521c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 5522c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 5523c6fd2807SJeff Garzik */ 5524c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 552544877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " 552644877b4eSTejun Heo "device error, dev_stat 0x%X\n", 552744877b4eSTejun Heo status); 5528c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5529c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5530c6fd2807SJeff Garzik goto fsm_start; 5531c6fd2807SJeff Garzik } 5532c6fd2807SJeff Garzik 5533c6fd2807SJeff Garzik atapi_pio_bytes(qc); 5534c6fd2807SJeff Garzik 5535c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 5536c6fd2807SJeff Garzik /* bad ireason reported by device */ 5537c6fd2807SJeff Garzik goto fsm_start; 5538c6fd2807SJeff Garzik 5539c6fd2807SJeff Garzik } else { 5540c6fd2807SJeff Garzik /* ATA PIO protocol */ 5541c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 5542c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 5543c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 5544c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 5545c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5546c6fd2807SJeff Garzik else 554755a8e2c8STejun Heo /* HSM violation. Let EH handle this. 554855a8e2c8STejun Heo * Phantom devices also trigger this 554955a8e2c8STejun Heo * condition. Mark hint. 555055a8e2c8STejun Heo */ 555155a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 555255a8e2c8STejun Heo AC_ERR_NODEV_HINT; 5553c6fd2807SJeff Garzik 5554c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5555c6fd2807SJeff Garzik goto fsm_start; 5556c6fd2807SJeff Garzik } 5557c6fd2807SJeff Garzik 5558c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 5559c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 5560c6fd2807SJeff Garzik * We respect DRQ here and transfer one 5561c6fd2807SJeff Garzik * block of junk data before changing the 5562c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 5563c6fd2807SJeff Garzik * 5564c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 5565c6fd2807SJeff Garzik * sense since the data block has been 5566c6fd2807SJeff Garzik * transferred to the device. 5567c6fd2807SJeff Garzik */ 5568c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 5569c6fd2807SJeff Garzik /* data might be corrputed */ 5570c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5571c6fd2807SJeff Garzik 5572c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 5573c6fd2807SJeff Garzik ata_pio_sectors(qc); 5574c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5575c6fd2807SJeff Garzik } 5576c6fd2807SJeff Garzik 5577c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 5578c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5579c6fd2807SJeff Garzik 5580c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 5581c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 5582c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 5583c6fd2807SJeff Garzik */ 5584c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5585c6fd2807SJeff Garzik goto fsm_start; 5586c6fd2807SJeff Garzik } 5587c6fd2807SJeff Garzik 5588c6fd2807SJeff Garzik ata_pio_sectors(qc); 5589c6fd2807SJeff Garzik 5590c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 5591c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 5592c6fd2807SJeff Garzik /* all data read */ 5593c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5594c6fd2807SJeff Garzik goto fsm_start; 5595c6fd2807SJeff Garzik } 5596c6fd2807SJeff Garzik } 5597c6fd2807SJeff Garzik 5598c6fd2807SJeff Garzik poll_next = 1; 5599c6fd2807SJeff Garzik break; 5600c6fd2807SJeff Garzik 5601c6fd2807SJeff Garzik case HSM_ST_LAST: 5602c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 5603c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 5604c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5605c6fd2807SJeff Garzik goto fsm_start; 5606c6fd2807SJeff Garzik } 5607c6fd2807SJeff Garzik 5608c6fd2807SJeff Garzik /* no more data to transfer */ 5609c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 561044877b4eSTejun Heo ap->print_id, qc->dev->devno, status); 5611c6fd2807SJeff Garzik 5612c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 5613c6fd2807SJeff Garzik 5614c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5615c6fd2807SJeff Garzik 5616c6fd2807SJeff Garzik /* complete taskfile transaction */ 5617c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5618c6fd2807SJeff Garzik 5619c6fd2807SJeff Garzik poll_next = 0; 5620c6fd2807SJeff Garzik break; 5621c6fd2807SJeff Garzik 5622c6fd2807SJeff Garzik case HSM_ST_ERR: 5623c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 5624c6fd2807SJeff Garzik * know what's wrong and recover 5625c6fd2807SJeff Garzik */ 5626c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 5627c6fd2807SJeff Garzik 5628c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5629c6fd2807SJeff Garzik 5630c6fd2807SJeff Garzik /* complete taskfile transaction */ 5631c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5632c6fd2807SJeff Garzik 5633c6fd2807SJeff Garzik poll_next = 0; 5634c6fd2807SJeff Garzik break; 5635c6fd2807SJeff Garzik default: 5636c6fd2807SJeff Garzik poll_next = 0; 5637c6fd2807SJeff Garzik BUG(); 5638c6fd2807SJeff Garzik } 5639c6fd2807SJeff Garzik 5640c6fd2807SJeff Garzik return poll_next; 5641c6fd2807SJeff Garzik } 5642c6fd2807SJeff Garzik 564365f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 5644c6fd2807SJeff Garzik { 564565f27f38SDavid Howells struct ata_port *ap = 564665f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 564765f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 5648c6fd2807SJeff Garzik u8 status; 5649c6fd2807SJeff Garzik int poll_next; 5650c6fd2807SJeff Garzik 5651c6fd2807SJeff Garzik fsm_start: 5652c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 5653c6fd2807SJeff Garzik 5654c6fd2807SJeff Garzik /* 5655c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 5656c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 5657c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 5658c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 5659c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 5660c6fd2807SJeff Garzik */ 5661c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 5662c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5663c6fd2807SJeff Garzik msleep(2); 5664c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 5665c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5666442eacc3SJeff Garzik ata_pio_queue_task(ap, qc, ATA_SHORT_PAUSE); 5667c6fd2807SJeff Garzik return; 5668c6fd2807SJeff Garzik } 5669c6fd2807SJeff Garzik } 5670c6fd2807SJeff Garzik 5671c6fd2807SJeff Garzik /* move the HSM */ 5672c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 5673c6fd2807SJeff Garzik 5674c6fd2807SJeff Garzik /* another command or interrupt handler 5675c6fd2807SJeff Garzik * may be running at this point. 5676c6fd2807SJeff Garzik */ 5677c6fd2807SJeff Garzik if (poll_next) 5678c6fd2807SJeff Garzik goto fsm_start; 5679c6fd2807SJeff Garzik } 5680c6fd2807SJeff Garzik 5681c6fd2807SJeff Garzik /** 5682c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 5683c6fd2807SJeff Garzik * @ap: Port associated with device @dev 5684c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5685c6fd2807SJeff Garzik * 5686c6fd2807SJeff Garzik * LOCKING: 5687c6fd2807SJeff Garzik * None. 5688c6fd2807SJeff Garzik */ 5689c6fd2807SJeff Garzik 5690c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 5691c6fd2807SJeff Garzik { 5692c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 5693c6fd2807SJeff Garzik unsigned int i; 5694c6fd2807SJeff Garzik 5695c6fd2807SJeff Garzik /* no command while frozen */ 5696c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 5697c6fd2807SJeff Garzik return NULL; 5698c6fd2807SJeff Garzik 5699c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 5700c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 5701c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 5702c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 5703c6fd2807SJeff Garzik break; 5704c6fd2807SJeff Garzik } 5705c6fd2807SJeff Garzik 5706c6fd2807SJeff Garzik if (qc) 5707c6fd2807SJeff Garzik qc->tag = i; 5708c6fd2807SJeff Garzik 5709c6fd2807SJeff Garzik return qc; 5710c6fd2807SJeff Garzik } 5711c6fd2807SJeff Garzik 5712c6fd2807SJeff Garzik /** 5713c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 5714c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5715c6fd2807SJeff Garzik * 5716c6fd2807SJeff Garzik * LOCKING: 5717c6fd2807SJeff Garzik * None. 5718c6fd2807SJeff Garzik */ 5719c6fd2807SJeff Garzik 5720c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 5721c6fd2807SJeff Garzik { 57229af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 5723c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5724c6fd2807SJeff Garzik 5725c6fd2807SJeff Garzik qc = ata_qc_new(ap); 5726c6fd2807SJeff Garzik if (qc) { 5727c6fd2807SJeff Garzik qc->scsicmd = NULL; 5728c6fd2807SJeff Garzik qc->ap = ap; 5729c6fd2807SJeff Garzik qc->dev = dev; 5730c6fd2807SJeff Garzik 5731c6fd2807SJeff Garzik ata_qc_reinit(qc); 5732c6fd2807SJeff Garzik } 5733c6fd2807SJeff Garzik 5734c6fd2807SJeff Garzik return qc; 5735c6fd2807SJeff Garzik } 5736c6fd2807SJeff Garzik 5737c6fd2807SJeff Garzik /** 5738c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 5739c6fd2807SJeff Garzik * @qc: Command to complete 5740c6fd2807SJeff Garzik * 5741c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 5742c6fd2807SJeff Garzik * in case something prevents using it. 5743c6fd2807SJeff Garzik * 5744c6fd2807SJeff Garzik * LOCKING: 5745cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5746c6fd2807SJeff Garzik */ 5747c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 5748c6fd2807SJeff Garzik { 5749c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5750c6fd2807SJeff Garzik unsigned int tag; 5751c6fd2807SJeff Garzik 5752c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5753c6fd2807SJeff Garzik 5754c6fd2807SJeff Garzik qc->flags = 0; 5755c6fd2807SJeff Garzik tag = qc->tag; 5756c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 5757c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 5758c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 5759c6fd2807SJeff Garzik } 5760c6fd2807SJeff Garzik } 5761c6fd2807SJeff Garzik 5762c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 5763c6fd2807SJeff Garzik { 5764c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 57659af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 5766c6fd2807SJeff Garzik 5767c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5768c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 5769c6fd2807SJeff Garzik 5770c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 5771c6fd2807SJeff Garzik ata_sg_clean(qc); 5772c6fd2807SJeff Garzik 5773c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 5774da917d69STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 57759af5c9c9STejun Heo link->sactive &= ~(1 << qc->tag); 5776da917d69STejun Heo if (!link->sactive) 5777da917d69STejun Heo ap->nr_active_links--; 5778da917d69STejun Heo } else { 57799af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 5780da917d69STejun Heo ap->nr_active_links--; 5781da917d69STejun Heo } 5782da917d69STejun Heo 5783da917d69STejun Heo /* clear exclusive status */ 5784da917d69STejun Heo if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 5785da917d69STejun Heo ap->excl_link == link)) 5786da917d69STejun Heo ap->excl_link = NULL; 5787c6fd2807SJeff Garzik 5788c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 5789c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 5790c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 5791c6fd2807SJeff Garzik */ 5792c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 5793c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 5794c6fd2807SJeff Garzik 5795c6fd2807SJeff Garzik /* call completion callback */ 5796c6fd2807SJeff Garzik qc->complete_fn(qc); 5797c6fd2807SJeff Garzik } 5798c6fd2807SJeff Garzik 579939599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 580039599a53STejun Heo { 580139599a53STejun Heo struct ata_port *ap = qc->ap; 580239599a53STejun Heo 580339599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 58044742d54fSMark Lord ap->ops->tf_read(ap, &qc->result_tf); 580539599a53STejun Heo } 580639599a53STejun Heo 580700115e0fSTejun Heo static void ata_verify_xfer(struct ata_queued_cmd *qc) 580800115e0fSTejun Heo { 580900115e0fSTejun Heo struct ata_device *dev = qc->dev; 581000115e0fSTejun Heo 581100115e0fSTejun Heo if (ata_tag_internal(qc->tag)) 581200115e0fSTejun Heo return; 581300115e0fSTejun Heo 581400115e0fSTejun Heo if (ata_is_nodata(qc->tf.protocol)) 581500115e0fSTejun Heo return; 581600115e0fSTejun Heo 581700115e0fSTejun Heo if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 581800115e0fSTejun Heo return; 581900115e0fSTejun Heo 582000115e0fSTejun Heo dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 582100115e0fSTejun Heo } 582200115e0fSTejun Heo 5823c6fd2807SJeff Garzik /** 5824c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 5825c6fd2807SJeff Garzik * @qc: Command to complete 5826c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 5827c6fd2807SJeff Garzik * 5828c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 5829c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 5830c6fd2807SJeff Garzik * 5831c6fd2807SJeff Garzik * LOCKING: 5832cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5833c6fd2807SJeff Garzik */ 5834c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 5835c6fd2807SJeff Garzik { 5836c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5837c6fd2807SJeff Garzik 5838c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 5839c6fd2807SJeff Garzik * synchronize EH with regular execution path. 5840c6fd2807SJeff Garzik * 5841c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 5842c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 5843c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 5844c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 5845c6fd2807SJeff Garzik * 5846c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 5847c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 5848c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 5849c6fd2807SJeff Garzik * taken care of. 5850c6fd2807SJeff Garzik */ 5851c6fd2807SJeff Garzik if (ap->ops->error_handler) { 58524dbfa39bSTejun Heo struct ata_device *dev = qc->dev; 58534dbfa39bSTejun Heo struct ata_eh_info *ehi = &dev->link->eh_info; 58544dbfa39bSTejun Heo 5855c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 5856c6fd2807SJeff Garzik 5857c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5858c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 5859c6fd2807SJeff Garzik 5860c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 5861c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 5862c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 586339599a53STejun Heo fill_result_tf(qc); 5864c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 5865c6fd2807SJeff Garzik return; 5866c6fd2807SJeff Garzik } 5867c6fd2807SJeff Garzik } 5868c6fd2807SJeff Garzik 5869c6fd2807SJeff Garzik /* read result TF if requested */ 5870c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 587139599a53STejun Heo fill_result_tf(qc); 5872c6fd2807SJeff Garzik 58734dbfa39bSTejun Heo /* Some commands need post-processing after successful 58744dbfa39bSTejun Heo * completion. 58754dbfa39bSTejun Heo */ 58764dbfa39bSTejun Heo switch (qc->tf.command) { 58774dbfa39bSTejun Heo case ATA_CMD_SET_FEATURES: 58784dbfa39bSTejun Heo if (qc->tf.feature != SETFEATURES_WC_ON && 58794dbfa39bSTejun Heo qc->tf.feature != SETFEATURES_WC_OFF) 58804dbfa39bSTejun Heo break; 58814dbfa39bSTejun Heo /* fall through */ 58824dbfa39bSTejun Heo case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 58834dbfa39bSTejun Heo case ATA_CMD_SET_MULTI: /* multi_count changed */ 58844dbfa39bSTejun Heo /* revalidate device */ 58854dbfa39bSTejun Heo ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 58864dbfa39bSTejun Heo ata_port_schedule_eh(ap); 58874dbfa39bSTejun Heo break; 5888054a5fbaSTejun Heo 5889054a5fbaSTejun Heo case ATA_CMD_SLEEP: 5890054a5fbaSTejun Heo dev->flags |= ATA_DFLAG_SLEEPING; 5891054a5fbaSTejun Heo break; 58924dbfa39bSTejun Heo } 58934dbfa39bSTejun Heo 589400115e0fSTejun Heo if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 589500115e0fSTejun Heo ata_verify_xfer(qc); 589600115e0fSTejun Heo 5897c6fd2807SJeff Garzik __ata_qc_complete(qc); 5898c6fd2807SJeff Garzik } else { 5899c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 5900c6fd2807SJeff Garzik return; 5901c6fd2807SJeff Garzik 5902c6fd2807SJeff Garzik /* read result TF if failed or requested */ 5903c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 590439599a53STejun Heo fill_result_tf(qc); 5905c6fd2807SJeff Garzik 5906c6fd2807SJeff Garzik __ata_qc_complete(qc); 5907c6fd2807SJeff Garzik } 5908c6fd2807SJeff Garzik } 5909c6fd2807SJeff Garzik 5910c6fd2807SJeff Garzik /** 5911c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 5912c6fd2807SJeff Garzik * @ap: port in question 5913c6fd2807SJeff Garzik * @qc_active: new qc_active mask 5914c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 5915c6fd2807SJeff Garzik * 5916c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 5917c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 5918c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 5919c6fd2807SJeff Garzik * and commands are completed accordingly. 5920c6fd2807SJeff Garzik * 5921c6fd2807SJeff Garzik * LOCKING: 5922cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5923c6fd2807SJeff Garzik * 5924c6fd2807SJeff Garzik * RETURNS: 5925c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 5926c6fd2807SJeff Garzik */ 5927c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 5928c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 5929c6fd2807SJeff Garzik { 5930c6fd2807SJeff Garzik int nr_done = 0; 5931c6fd2807SJeff Garzik u32 done_mask; 5932c6fd2807SJeff Garzik int i; 5933c6fd2807SJeff Garzik 5934c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 5935c6fd2807SJeff Garzik 5936c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 5937c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 5938c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 5939c6fd2807SJeff Garzik return -EINVAL; 5940c6fd2807SJeff Garzik } 5941c6fd2807SJeff Garzik 5942c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 5943c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5944c6fd2807SJeff Garzik 5945c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 5946c6fd2807SJeff Garzik continue; 5947c6fd2807SJeff Garzik 5948c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 5949c6fd2807SJeff Garzik if (finish_qc) 5950c6fd2807SJeff Garzik finish_qc(qc); 5951c6fd2807SJeff Garzik ata_qc_complete(qc); 5952c6fd2807SJeff Garzik nr_done++; 5953c6fd2807SJeff Garzik } 5954c6fd2807SJeff Garzik } 5955c6fd2807SJeff Garzik 5956c6fd2807SJeff Garzik return nr_done; 5957c6fd2807SJeff Garzik } 5958c6fd2807SJeff Garzik 5959c6fd2807SJeff Garzik /** 5960c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 5961c6fd2807SJeff Garzik * @qc: command to issue to device 5962c6fd2807SJeff Garzik * 5963c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 5964c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 5965c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 5966c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 5967c6fd2807SJeff Garzik * 5968c6fd2807SJeff Garzik * LOCKING: 5969cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5970c6fd2807SJeff Garzik */ 5971c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 5972c6fd2807SJeff Garzik { 5973c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 59749af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 5975405e66b3STejun Heo u8 prot = qc->tf.protocol; 5976c6fd2807SJeff Garzik 5977c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 5978c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 5979c6fd2807SJeff Garzik * request ATAPI sense. 5980c6fd2807SJeff Garzik */ 59819af5c9c9STejun Heo WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); 5982c6fd2807SJeff Garzik 59831973a023STejun Heo if (ata_is_ncq(prot)) { 59849af5c9c9STejun Heo WARN_ON(link->sactive & (1 << qc->tag)); 5985da917d69STejun Heo 5986da917d69STejun Heo if (!link->sactive) 5987da917d69STejun Heo ap->nr_active_links++; 59889af5c9c9STejun Heo link->sactive |= 1 << qc->tag; 5989c6fd2807SJeff Garzik } else { 59909af5c9c9STejun Heo WARN_ON(link->sactive); 5991da917d69STejun Heo 5992da917d69STejun Heo ap->nr_active_links++; 59939af5c9c9STejun Heo link->active_tag = qc->tag; 5994c6fd2807SJeff Garzik } 5995c6fd2807SJeff Garzik 5996c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 5997c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 5998c6fd2807SJeff Garzik 5999f92a2636STejun Heo /* We guarantee to LLDs that they will have at least one 6000f92a2636STejun Heo * non-zero sg if the command is a data command. 6001f92a2636STejun Heo */ 6002ff2aeb1eSTejun Heo BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); 6003f92a2636STejun Heo 6004405e66b3STejun Heo if (ata_is_dma(prot) || (ata_is_pio(prot) && 6005f92a2636STejun Heo (ap->flags & ATA_FLAG_PIO_DMA))) 6006c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 6007c6fd2807SJeff Garzik goto sg_err; 6008c6fd2807SJeff Garzik 6009054a5fbaSTejun Heo /* if device is sleeping, schedule softreset and abort the link */ 6010054a5fbaSTejun Heo if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 6011054a5fbaSTejun Heo link->eh_info.action |= ATA_EH_SOFTRESET; 6012054a5fbaSTejun Heo ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 6013054a5fbaSTejun Heo ata_link_abort(link); 6014054a5fbaSTejun Heo return; 6015054a5fbaSTejun Heo } 6016054a5fbaSTejun Heo 6017c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 6018c6fd2807SJeff Garzik 6019c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 6020c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 6021c6fd2807SJeff Garzik goto err; 6022c6fd2807SJeff Garzik return; 6023c6fd2807SJeff Garzik 6024c6fd2807SJeff Garzik sg_err: 6025c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 6026c6fd2807SJeff Garzik err: 6027c6fd2807SJeff Garzik ata_qc_complete(qc); 6028c6fd2807SJeff Garzik } 6029c6fd2807SJeff Garzik 6030c6fd2807SJeff Garzik /** 6031c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 6032c6fd2807SJeff Garzik * @qc: command to issue to device 6033c6fd2807SJeff Garzik * 6034c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 6035c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 6036c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 6037c6fd2807SJeff Garzik * is slightly different. 6038c6fd2807SJeff Garzik * 6039c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 6040c6fd2807SJeff Garzik * 6041c6fd2807SJeff Garzik * LOCKING: 6042cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 6043c6fd2807SJeff Garzik * 6044c6fd2807SJeff Garzik * RETURNS: 6045c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 6046c6fd2807SJeff Garzik */ 6047c6fd2807SJeff Garzik 6048c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 6049c6fd2807SJeff Garzik { 6050c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 6051c6fd2807SJeff Garzik 6052c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 6053c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 6054c6fd2807SJeff Garzik */ 6055c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 6056c6fd2807SJeff Garzik switch (qc->tf.protocol) { 6057c6fd2807SJeff Garzik case ATA_PROT_PIO: 6058e3472cbeSAlbert Lee case ATA_PROT_NODATA: 60590dc36888STejun Heo case ATAPI_PROT_PIO: 60600dc36888STejun Heo case ATAPI_PROT_NODATA: 6061c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 6062c6fd2807SJeff Garzik break; 60630dc36888STejun Heo case ATAPI_PROT_DMA: 6064c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 6065c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 6066c6fd2807SJeff Garzik BUG(); 6067c6fd2807SJeff Garzik break; 6068c6fd2807SJeff Garzik default: 6069c6fd2807SJeff Garzik break; 6070c6fd2807SJeff Garzik } 6071c6fd2807SJeff Garzik } 6072c6fd2807SJeff Garzik 6073c6fd2807SJeff Garzik /* select the device */ 6074c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 6075c6fd2807SJeff Garzik 6076c6fd2807SJeff Garzik /* start the command */ 6077c6fd2807SJeff Garzik switch (qc->tf.protocol) { 6078c6fd2807SJeff Garzik case ATA_PROT_NODATA: 6079c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 6080c6fd2807SJeff Garzik ata_qc_set_polling(qc); 6081c6fd2807SJeff Garzik 6082c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 6083c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 6084c6fd2807SJeff Garzik 6085c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 6086442eacc3SJeff Garzik ata_pio_queue_task(ap, qc, 0); 6087c6fd2807SJeff Garzik 6088c6fd2807SJeff Garzik break; 6089c6fd2807SJeff Garzik 6090c6fd2807SJeff Garzik case ATA_PROT_DMA: 6091c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 6092c6fd2807SJeff Garzik 6093c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 6094c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 6095c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 6096c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 6097c6fd2807SJeff Garzik break; 6098c6fd2807SJeff Garzik 6099c6fd2807SJeff Garzik case ATA_PROT_PIO: 6100c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 6101c6fd2807SJeff Garzik ata_qc_set_polling(qc); 6102c6fd2807SJeff Garzik 6103c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 6104c6fd2807SJeff Garzik 6105c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 6106c6fd2807SJeff Garzik /* PIO data out protocol */ 6107c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 6108442eacc3SJeff Garzik ata_pio_queue_task(ap, qc, 0); 6109c6fd2807SJeff Garzik 6110c6fd2807SJeff Garzik /* always send first data block using 6111c6fd2807SJeff Garzik * the ata_pio_task() codepath. 6112c6fd2807SJeff Garzik */ 6113c6fd2807SJeff Garzik } else { 6114c6fd2807SJeff Garzik /* PIO data in protocol */ 6115c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 6116c6fd2807SJeff Garzik 6117c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 6118442eacc3SJeff Garzik ata_pio_queue_task(ap, qc, 0); 6119c6fd2807SJeff Garzik 6120c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 6121c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 6122c6fd2807SJeff Garzik */ 6123c6fd2807SJeff Garzik } 6124c6fd2807SJeff Garzik 6125c6fd2807SJeff Garzik break; 6126c6fd2807SJeff Garzik 61270dc36888STejun Heo case ATAPI_PROT_PIO: 61280dc36888STejun Heo case ATAPI_PROT_NODATA: 6129c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 6130c6fd2807SJeff Garzik ata_qc_set_polling(qc); 6131c6fd2807SJeff Garzik 6132c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 6133c6fd2807SJeff Garzik 6134c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 6135c6fd2807SJeff Garzik 6136c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 6137c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 6138c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 6139442eacc3SJeff Garzik ata_pio_queue_task(ap, qc, 0); 6140c6fd2807SJeff Garzik break; 6141c6fd2807SJeff Garzik 61420dc36888STejun Heo case ATAPI_PROT_DMA: 6143c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 6144c6fd2807SJeff Garzik 6145c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 6146c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 6147c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 6148c6fd2807SJeff Garzik 6149c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 6150c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 6151442eacc3SJeff Garzik ata_pio_queue_task(ap, qc, 0); 6152c6fd2807SJeff Garzik break; 6153c6fd2807SJeff Garzik 6154c6fd2807SJeff Garzik default: 6155c6fd2807SJeff Garzik WARN_ON(1); 6156c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6157c6fd2807SJeff Garzik } 6158c6fd2807SJeff Garzik 6159c6fd2807SJeff Garzik return 0; 6160c6fd2807SJeff Garzik } 6161c6fd2807SJeff Garzik 6162c6fd2807SJeff Garzik /** 6163c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 6164c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 6165c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 6166c6fd2807SJeff Garzik * 6167c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 6168c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 6169c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 6170c6fd2807SJeff Garzik * 6171c6fd2807SJeff Garzik * LOCKING: 6172cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 6173c6fd2807SJeff Garzik * 6174c6fd2807SJeff Garzik * RETURNS: 6175c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 6176c6fd2807SJeff Garzik */ 6177c6fd2807SJeff Garzik 6178c6fd2807SJeff Garzik inline unsigned int ata_host_intr(struct ata_port *ap, 6179c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 6180c6fd2807SJeff Garzik { 61819af5c9c9STejun Heo struct ata_eh_info *ehi = &ap->link.eh_info; 6182c6fd2807SJeff Garzik u8 status, host_stat = 0; 6183c6fd2807SJeff Garzik 6184c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 618544877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state); 6186c6fd2807SJeff Garzik 6187c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 6188c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 6189c6fd2807SJeff Garzik case HSM_ST_FIRST: 6190c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 6191c6fd2807SJeff Garzik * at this state when ready to receive CDB. 6192c6fd2807SJeff Garzik */ 6193c6fd2807SJeff Garzik 6194c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 6195405e66b3STejun Heo * The flag was turned on only for atapi devices. No 6196405e66b3STejun Heo * need to check ata_is_atapi(qc->tf.protocol) again. 6197c6fd2807SJeff Garzik */ 6198c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 6199c6fd2807SJeff Garzik goto idle_irq; 6200c6fd2807SJeff Garzik break; 6201c6fd2807SJeff Garzik case HSM_ST_LAST: 6202c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 62030dc36888STejun Heo qc->tf.protocol == ATAPI_PROT_DMA) { 6204c6fd2807SJeff Garzik /* check status of DMA engine */ 6205c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 620644877b4eSTejun Heo VPRINTK("ata%u: host_stat 0x%X\n", 620744877b4eSTejun Heo ap->print_id, host_stat); 6208c6fd2807SJeff Garzik 6209c6fd2807SJeff Garzik /* if it's not our irq... */ 6210c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 6211c6fd2807SJeff Garzik goto idle_irq; 6212c6fd2807SJeff Garzik 6213c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 6214c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 6215c6fd2807SJeff Garzik 6216c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 6217c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 6218c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 6219c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 6220c6fd2807SJeff Garzik } 6221c6fd2807SJeff Garzik } 6222c6fd2807SJeff Garzik break; 6223c6fd2807SJeff Garzik case HSM_ST: 6224c6fd2807SJeff Garzik break; 6225c6fd2807SJeff Garzik default: 6226c6fd2807SJeff Garzik goto idle_irq; 6227c6fd2807SJeff Garzik } 6228c6fd2807SJeff Garzik 6229c6fd2807SJeff Garzik /* check altstatus */ 6230c6fd2807SJeff Garzik status = ata_altstatus(ap); 6231c6fd2807SJeff Garzik if (status & ATA_BUSY) 6232c6fd2807SJeff Garzik goto idle_irq; 6233c6fd2807SJeff Garzik 6234c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 6235c6fd2807SJeff Garzik status = ata_chk_status(ap); 6236c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 6237c6fd2807SJeff Garzik goto idle_irq; 6238c6fd2807SJeff Garzik 6239c6fd2807SJeff Garzik /* ack bmdma irq events */ 6240c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 6241c6fd2807SJeff Garzik 6242c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 6243ea54763fSTejun Heo 6244ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 62450dc36888STejun Heo qc->tf.protocol == ATAPI_PROT_DMA)) 6246ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 6247ea54763fSTejun Heo 6248c6fd2807SJeff Garzik return 1; /* irq handled */ 6249c6fd2807SJeff Garzik 6250c6fd2807SJeff Garzik idle_irq: 6251c6fd2807SJeff Garzik ap->stats.idle_irq++; 6252c6fd2807SJeff Garzik 6253c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 6254c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 62556d32d30fSJeff Garzik ata_chk_status(ap); 62566d32d30fSJeff Garzik ap->ops->irq_clear(ap); 6257c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 6258c6fd2807SJeff Garzik return 1; 6259c6fd2807SJeff Garzik } 6260c6fd2807SJeff Garzik #endif 6261c6fd2807SJeff Garzik return 0; /* irq not handled */ 6262c6fd2807SJeff Garzik } 6263c6fd2807SJeff Garzik 6264c6fd2807SJeff Garzik /** 6265c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 6266c6fd2807SJeff Garzik * @irq: irq line (unused) 6267cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 6268c6fd2807SJeff Garzik * 6269c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 6270c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 6271c6fd2807SJeff Garzik * 6272c6fd2807SJeff Garzik * LOCKING: 6273cca3974eSJeff Garzik * Obtains host lock during operation. 6274c6fd2807SJeff Garzik * 6275c6fd2807SJeff Garzik * RETURNS: 6276c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 6277c6fd2807SJeff Garzik */ 6278c6fd2807SJeff Garzik 62797d12e780SDavid Howells irqreturn_t ata_interrupt(int irq, void *dev_instance) 6280c6fd2807SJeff Garzik { 6281cca3974eSJeff Garzik struct ata_host *host = dev_instance; 6282c6fd2807SJeff Garzik unsigned int i; 6283c6fd2807SJeff Garzik unsigned int handled = 0; 6284c6fd2807SJeff Garzik unsigned long flags; 6285c6fd2807SJeff Garzik 6286c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 6287cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 6288c6fd2807SJeff Garzik 6289cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6290c6fd2807SJeff Garzik struct ata_port *ap; 6291c6fd2807SJeff Garzik 6292cca3974eSJeff Garzik ap = host->ports[i]; 6293c6fd2807SJeff Garzik if (ap && 6294c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 6295c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 6296c6fd2807SJeff Garzik 62979af5c9c9STejun Heo qc = ata_qc_from_tag(ap, ap->link.active_tag); 6298c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 6299c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 6300c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 6301c6fd2807SJeff Garzik } 6302c6fd2807SJeff Garzik } 6303c6fd2807SJeff Garzik 6304cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 6305c6fd2807SJeff Garzik 6306c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 6307c6fd2807SJeff Garzik } 6308c6fd2807SJeff Garzik 6309c6fd2807SJeff Garzik /** 6310c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 6311936fd732STejun Heo * @link: ATA link to test SCR accessibility for 6312c6fd2807SJeff Garzik * 6313936fd732STejun Heo * Test whether SCRs are accessible for @link. 6314c6fd2807SJeff Garzik * 6315c6fd2807SJeff Garzik * LOCKING: 6316c6fd2807SJeff Garzik * None. 6317c6fd2807SJeff Garzik * 6318c6fd2807SJeff Garzik * RETURNS: 6319c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 6320c6fd2807SJeff Garzik */ 6321936fd732STejun Heo int sata_scr_valid(struct ata_link *link) 6322c6fd2807SJeff Garzik { 6323936fd732STejun Heo struct ata_port *ap = link->ap; 6324936fd732STejun Heo 6325a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 6326c6fd2807SJeff Garzik } 6327c6fd2807SJeff Garzik 6328c6fd2807SJeff Garzik /** 6329c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 6330936fd732STejun Heo * @link: ATA link to read SCR for 6331c6fd2807SJeff Garzik * @reg: SCR to read 6332c6fd2807SJeff Garzik * @val: Place to store read value 6333c6fd2807SJeff Garzik * 6334936fd732STejun Heo * Read SCR register @reg of @link into *@val. This function is 6335633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 6336633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 6337c6fd2807SJeff Garzik * 6338c6fd2807SJeff Garzik * LOCKING: 6339633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 6340c6fd2807SJeff Garzik * 6341c6fd2807SJeff Garzik * RETURNS: 6342c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 6343c6fd2807SJeff Garzik */ 6344936fd732STejun Heo int sata_scr_read(struct ata_link *link, int reg, u32 *val) 6345c6fd2807SJeff Garzik { 6346633273a3STejun Heo if (ata_is_host_link(link)) { 6347936fd732STejun Heo struct ata_port *ap = link->ap; 6348936fd732STejun Heo 6349936fd732STejun Heo if (sata_scr_valid(link)) 6350da3dbb17STejun Heo return ap->ops->scr_read(ap, reg, val); 6351c6fd2807SJeff Garzik return -EOPNOTSUPP; 6352c6fd2807SJeff Garzik } 6353c6fd2807SJeff Garzik 6354633273a3STejun Heo return sata_pmp_scr_read(link, reg, val); 6355633273a3STejun Heo } 6356633273a3STejun Heo 6357c6fd2807SJeff Garzik /** 6358c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 6359936fd732STejun Heo * @link: ATA link to write SCR for 6360c6fd2807SJeff Garzik * @reg: SCR to write 6361c6fd2807SJeff Garzik * @val: value to write 6362c6fd2807SJeff Garzik * 6363936fd732STejun Heo * Write @val to SCR register @reg of @link. This function is 6364633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 6365633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 6366c6fd2807SJeff Garzik * 6367c6fd2807SJeff Garzik * LOCKING: 6368633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 6369c6fd2807SJeff Garzik * 6370c6fd2807SJeff Garzik * RETURNS: 6371c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 6372c6fd2807SJeff Garzik */ 6373936fd732STejun Heo int sata_scr_write(struct ata_link *link, int reg, u32 val) 6374c6fd2807SJeff Garzik { 6375633273a3STejun Heo if (ata_is_host_link(link)) { 6376936fd732STejun Heo struct ata_port *ap = link->ap; 6377936fd732STejun Heo 6378936fd732STejun Heo if (sata_scr_valid(link)) 6379da3dbb17STejun Heo return ap->ops->scr_write(ap, reg, val); 6380c6fd2807SJeff Garzik return -EOPNOTSUPP; 6381c6fd2807SJeff Garzik } 6382c6fd2807SJeff Garzik 6383633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 6384633273a3STejun Heo } 6385633273a3STejun Heo 6386c6fd2807SJeff Garzik /** 6387c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 6388936fd732STejun Heo * @link: ATA link to write SCR for 6389c6fd2807SJeff Garzik * @reg: SCR to write 6390c6fd2807SJeff Garzik * @val: value to write 6391c6fd2807SJeff Garzik * 6392c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 6393c6fd2807SJeff Garzik * function performs flush after writing to the register. 6394c6fd2807SJeff Garzik * 6395c6fd2807SJeff Garzik * LOCKING: 6396633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 6397c6fd2807SJeff Garzik * 6398c6fd2807SJeff Garzik * RETURNS: 6399c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 6400c6fd2807SJeff Garzik */ 6401936fd732STejun Heo int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 6402c6fd2807SJeff Garzik { 6403633273a3STejun Heo if (ata_is_host_link(link)) { 6404936fd732STejun Heo struct ata_port *ap = link->ap; 6405da3dbb17STejun Heo int rc; 6406da3dbb17STejun Heo 6407936fd732STejun Heo if (sata_scr_valid(link)) { 6408da3dbb17STejun Heo rc = ap->ops->scr_write(ap, reg, val); 6409da3dbb17STejun Heo if (rc == 0) 6410da3dbb17STejun Heo rc = ap->ops->scr_read(ap, reg, &val); 6411da3dbb17STejun Heo return rc; 6412c6fd2807SJeff Garzik } 6413c6fd2807SJeff Garzik return -EOPNOTSUPP; 6414c6fd2807SJeff Garzik } 6415c6fd2807SJeff Garzik 6416633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 6417633273a3STejun Heo } 6418633273a3STejun Heo 6419c6fd2807SJeff Garzik /** 6420936fd732STejun Heo * ata_link_online - test whether the given link is online 6421936fd732STejun Heo * @link: ATA link to test 6422c6fd2807SJeff Garzik * 6423936fd732STejun Heo * Test whether @link is online. Note that this function returns 6424936fd732STejun Heo * 0 if online status of @link cannot be obtained, so 6425936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 6426c6fd2807SJeff Garzik * 6427c6fd2807SJeff Garzik * LOCKING: 6428c6fd2807SJeff Garzik * None. 6429c6fd2807SJeff Garzik * 6430c6fd2807SJeff Garzik * RETURNS: 6431c6fd2807SJeff Garzik * 1 if the port online status is available and online. 6432c6fd2807SJeff Garzik */ 6433936fd732STejun Heo int ata_link_online(struct ata_link *link) 6434c6fd2807SJeff Garzik { 6435c6fd2807SJeff Garzik u32 sstatus; 6436c6fd2807SJeff Garzik 6437936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 6438936fd732STejun Heo (sstatus & 0xf) == 0x3) 6439c6fd2807SJeff Garzik return 1; 6440c6fd2807SJeff Garzik return 0; 6441c6fd2807SJeff Garzik } 6442c6fd2807SJeff Garzik 6443c6fd2807SJeff Garzik /** 6444936fd732STejun Heo * ata_link_offline - test whether the given link is offline 6445936fd732STejun Heo * @link: ATA link to test 6446c6fd2807SJeff Garzik * 6447936fd732STejun Heo * Test whether @link is offline. Note that this function 6448936fd732STejun Heo * returns 0 if offline status of @link cannot be obtained, so 6449936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 6450c6fd2807SJeff Garzik * 6451c6fd2807SJeff Garzik * LOCKING: 6452c6fd2807SJeff Garzik * None. 6453c6fd2807SJeff Garzik * 6454c6fd2807SJeff Garzik * RETURNS: 6455c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 6456c6fd2807SJeff Garzik */ 6457936fd732STejun Heo int ata_link_offline(struct ata_link *link) 6458c6fd2807SJeff Garzik { 6459c6fd2807SJeff Garzik u32 sstatus; 6460c6fd2807SJeff Garzik 6461936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 6462936fd732STejun Heo (sstatus & 0xf) != 0x3) 6463c6fd2807SJeff Garzik return 1; 6464c6fd2807SJeff Garzik return 0; 6465c6fd2807SJeff Garzik } 6466c6fd2807SJeff Garzik 6467c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 6468c6fd2807SJeff Garzik { 6469c6fd2807SJeff Garzik unsigned int err_mask; 6470c6fd2807SJeff Garzik u8 cmd; 6471c6fd2807SJeff Garzik 6472c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 6473c6fd2807SJeff Garzik return 0; 6474c6fd2807SJeff Garzik 64756fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 6476c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 6477c6fd2807SJeff Garzik else 6478c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 6479c6fd2807SJeff Garzik 64804f34337bSAlan Cox /* This is wrong. On a failed flush we get back the LBA of the lost 64814f34337bSAlan Cox sector and we should (assuming it wasn't aborted as unknown) issue 64824f34337bSAlan Cox a further flush command to continue the writeback until it 64834f34337bSAlan Cox does not error */ 6484c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 6485c6fd2807SJeff Garzik if (err_mask) { 6486c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 6487c6fd2807SJeff Garzik return -EIO; 6488c6fd2807SJeff Garzik } 6489c6fd2807SJeff Garzik 6490c6fd2807SJeff Garzik return 0; 6491c6fd2807SJeff Garzik } 6492c6fd2807SJeff Garzik 64936ffa01d8STejun Heo #ifdef CONFIG_PM 6494cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 6495cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 6496cca3974eSJeff Garzik int wait) 6497c6fd2807SJeff Garzik { 6498c6fd2807SJeff Garzik unsigned long flags; 6499c6fd2807SJeff Garzik int i, rc; 6500c6fd2807SJeff Garzik 6501cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6502cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6503e3667ebfSTejun Heo struct ata_link *link; 6504c6fd2807SJeff Garzik 6505c6fd2807SJeff Garzik /* Previous resume operation might still be in 6506c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 6507c6fd2807SJeff Garzik */ 6508c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 6509c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6510c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 6511c6fd2807SJeff Garzik } 6512c6fd2807SJeff Garzik 6513c6fd2807SJeff Garzik /* request PM ops to EH */ 6514c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6515c6fd2807SJeff Garzik 6516c6fd2807SJeff Garzik ap->pm_mesg = mesg; 6517c6fd2807SJeff Garzik if (wait) { 6518c6fd2807SJeff Garzik rc = 0; 6519c6fd2807SJeff Garzik ap->pm_result = &rc; 6520c6fd2807SJeff Garzik } 6521c6fd2807SJeff Garzik 6522c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 6523e3667ebfSTejun Heo __ata_port_for_each_link(link, ap) { 6524e3667ebfSTejun Heo link->eh_info.action |= action; 6525e3667ebfSTejun Heo link->eh_info.flags |= ehi_flags; 6526e3667ebfSTejun Heo } 6527c6fd2807SJeff Garzik 6528c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 6529c6fd2807SJeff Garzik 6530c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6531c6fd2807SJeff Garzik 6532c6fd2807SJeff Garzik /* wait and check result */ 6533c6fd2807SJeff Garzik if (wait) { 6534c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6535c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 6536c6fd2807SJeff Garzik if (rc) 6537c6fd2807SJeff Garzik return rc; 6538c6fd2807SJeff Garzik } 6539c6fd2807SJeff Garzik } 6540c6fd2807SJeff Garzik 6541c6fd2807SJeff Garzik return 0; 6542c6fd2807SJeff Garzik } 6543c6fd2807SJeff Garzik 6544c6fd2807SJeff Garzik /** 6545cca3974eSJeff Garzik * ata_host_suspend - suspend host 6546cca3974eSJeff Garzik * @host: host to suspend 6547c6fd2807SJeff Garzik * @mesg: PM message 6548c6fd2807SJeff Garzik * 6549cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 6550c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 6551c6fd2807SJeff Garzik * to finish. 6552c6fd2807SJeff Garzik * 6553c6fd2807SJeff Garzik * LOCKING: 6554c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6555c6fd2807SJeff Garzik * 6556c6fd2807SJeff Garzik * RETURNS: 6557c6fd2807SJeff Garzik * 0 on success, -errno on failure. 6558c6fd2807SJeff Garzik */ 6559cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 6560c6fd2807SJeff Garzik { 65619666f400STejun Heo int rc; 6562c6fd2807SJeff Garzik 6563ca77329fSKristen Carlson Accardi /* 6564ca77329fSKristen Carlson Accardi * disable link pm on all ports before requesting 6565ca77329fSKristen Carlson Accardi * any pm activity 6566ca77329fSKristen Carlson Accardi */ 6567ca77329fSKristen Carlson Accardi ata_lpm_enable(host); 6568ca77329fSKristen Carlson Accardi 6569cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 657072ad6ec4SJeff Garzik if (rc == 0) 657172ad6ec4SJeff Garzik host->dev->power.power_state = mesg; 6572c6fd2807SJeff Garzik return rc; 6573c6fd2807SJeff Garzik } 6574c6fd2807SJeff Garzik 6575c6fd2807SJeff Garzik /** 6576cca3974eSJeff Garzik * ata_host_resume - resume host 6577cca3974eSJeff Garzik * @host: host to resume 6578c6fd2807SJeff Garzik * 6579cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 6580c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 6581c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 6582c6fd2807SJeff Garzik * 6583c6fd2807SJeff Garzik * LOCKING: 6584c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6585c6fd2807SJeff Garzik */ 6586cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 6587c6fd2807SJeff Garzik { 6588cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 6589c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 659072ad6ec4SJeff Garzik host->dev->power.power_state = PMSG_ON; 6591ca77329fSKristen Carlson Accardi 6592ca77329fSKristen Carlson Accardi /* reenable link pm */ 6593ca77329fSKristen Carlson Accardi ata_lpm_disable(host); 6594c6fd2807SJeff Garzik } 65956ffa01d8STejun Heo #endif 6596c6fd2807SJeff Garzik 6597c6fd2807SJeff Garzik /** 6598c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 6599c6fd2807SJeff Garzik * @ap: Port to initialize 6600c6fd2807SJeff Garzik * 6601c6fd2807SJeff Garzik * Called just after data structures for each port are 6602c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 6603c6fd2807SJeff Garzik * 6604c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 6605c6fd2807SJeff Garzik * 6606c6fd2807SJeff Garzik * LOCKING: 6607c6fd2807SJeff Garzik * Inherited from caller. 6608c6fd2807SJeff Garzik */ 6609c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 6610c6fd2807SJeff Garzik { 6611c6fd2807SJeff Garzik struct device *dev = ap->dev; 6612c6fd2807SJeff Garzik 6613f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 6614f0d36efdSTejun Heo GFP_KERNEL); 6615c6fd2807SJeff Garzik if (!ap->prd) 6616c6fd2807SJeff Garzik return -ENOMEM; 6617c6fd2807SJeff Garzik 6618c6fd2807SJeff Garzik return 0; 6619c6fd2807SJeff Garzik } 6620c6fd2807SJeff Garzik 6621c6fd2807SJeff Garzik /** 6622c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 6623c6fd2807SJeff Garzik * @dev: Device structure to initialize 6624c6fd2807SJeff Garzik * 6625c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 6626c6fd2807SJeff Garzik * 6627c6fd2807SJeff Garzik * LOCKING: 6628c6fd2807SJeff Garzik * Inherited from caller. 6629c6fd2807SJeff Garzik */ 6630c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 6631c6fd2807SJeff Garzik { 66329af5c9c9STejun Heo struct ata_link *link = dev->link; 66339af5c9c9STejun Heo struct ata_port *ap = link->ap; 6634c6fd2807SJeff Garzik unsigned long flags; 6635c6fd2807SJeff Garzik 6636c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 66379af5c9c9STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 66389af5c9c9STejun Heo link->sata_spd = 0; 6639c6fd2807SJeff Garzik 6640c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 6641c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 6642cca3974eSJeff Garzik * host lock. 6643c6fd2807SJeff Garzik */ 6644c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6645c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 66463dcc323fSTejun Heo dev->horkage = 0; 6647c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6648c6fd2807SJeff Garzik 6649c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 6650c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 6651c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 6652c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 6653c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 6654c6fd2807SJeff Garzik } 6655c6fd2807SJeff Garzik 6656c6fd2807SJeff Garzik /** 66574fb37a25STejun Heo * ata_link_init - Initialize an ata_link structure 66584fb37a25STejun Heo * @ap: ATA port link is attached to 66594fb37a25STejun Heo * @link: Link structure to initialize 66608989805dSTejun Heo * @pmp: Port multiplier port number 66614fb37a25STejun Heo * 66624fb37a25STejun Heo * Initialize @link. 66634fb37a25STejun Heo * 66644fb37a25STejun Heo * LOCKING: 66654fb37a25STejun Heo * Kernel thread context (may sleep) 66664fb37a25STejun Heo */ 6667fb7fd614STejun Heo void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 66684fb37a25STejun Heo { 66694fb37a25STejun Heo int i; 66704fb37a25STejun Heo 66714fb37a25STejun Heo /* clear everything except for devices */ 66724fb37a25STejun Heo memset(link, 0, offsetof(struct ata_link, device[0])); 66734fb37a25STejun Heo 66744fb37a25STejun Heo link->ap = ap; 66758989805dSTejun Heo link->pmp = pmp; 66764fb37a25STejun Heo link->active_tag = ATA_TAG_POISON; 66774fb37a25STejun Heo link->hw_sata_spd_limit = UINT_MAX; 66784fb37a25STejun Heo 66794fb37a25STejun Heo /* can't use iterator, ap isn't initialized yet */ 66804fb37a25STejun Heo for (i = 0; i < ATA_MAX_DEVICES; i++) { 66814fb37a25STejun Heo struct ata_device *dev = &link->device[i]; 66824fb37a25STejun Heo 66834fb37a25STejun Heo dev->link = link; 66844fb37a25STejun Heo dev->devno = dev - link->device; 66854fb37a25STejun Heo ata_dev_init(dev); 66864fb37a25STejun Heo } 66874fb37a25STejun Heo } 66884fb37a25STejun Heo 66894fb37a25STejun Heo /** 66904fb37a25STejun Heo * sata_link_init_spd - Initialize link->sata_spd_limit 66914fb37a25STejun Heo * @link: Link to configure sata_spd_limit for 66924fb37a25STejun Heo * 66934fb37a25STejun Heo * Initialize @link->[hw_]sata_spd_limit to the currently 66944fb37a25STejun Heo * configured value. 66954fb37a25STejun Heo * 66964fb37a25STejun Heo * LOCKING: 66974fb37a25STejun Heo * Kernel thread context (may sleep). 66984fb37a25STejun Heo * 66994fb37a25STejun Heo * RETURNS: 67004fb37a25STejun Heo * 0 on success, -errno on failure. 67014fb37a25STejun Heo */ 6702fb7fd614STejun Heo int sata_link_init_spd(struct ata_link *link) 67034fb37a25STejun Heo { 670433267325STejun Heo u32 scontrol; 670533267325STejun Heo u8 spd; 67064fb37a25STejun Heo int rc; 67074fb37a25STejun Heo 67084fb37a25STejun Heo rc = sata_scr_read(link, SCR_CONTROL, &scontrol); 67094fb37a25STejun Heo if (rc) 67104fb37a25STejun Heo return rc; 67114fb37a25STejun Heo 67124fb37a25STejun Heo spd = (scontrol >> 4) & 0xf; 67134fb37a25STejun Heo if (spd) 67144fb37a25STejun Heo link->hw_sata_spd_limit &= (1 << spd) - 1; 67154fb37a25STejun Heo 671633267325STejun Heo ata_force_spd_limit(link); 671733267325STejun Heo 67184fb37a25STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 67194fb37a25STejun Heo 67204fb37a25STejun Heo return 0; 67214fb37a25STejun Heo } 67224fb37a25STejun Heo 67234fb37a25STejun Heo /** 6724f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 6725f3187195STejun Heo * @host: ATA host this allocated port belongs to 6726c6fd2807SJeff Garzik * 6727f3187195STejun Heo * Allocate and initialize basic ATA port resources. 6728f3187195STejun Heo * 6729f3187195STejun Heo * RETURNS: 6730f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 6731c6fd2807SJeff Garzik * 6732c6fd2807SJeff Garzik * LOCKING: 6733f3187195STejun Heo * Inherited from calling layer (may sleep). 6734c6fd2807SJeff Garzik */ 6735f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 6736c6fd2807SJeff Garzik { 6737f3187195STejun Heo struct ata_port *ap; 6738c6fd2807SJeff Garzik 6739f3187195STejun Heo DPRINTK("ENTER\n"); 6740f3187195STejun Heo 6741f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 6742f3187195STejun Heo if (!ap) 6743f3187195STejun Heo return NULL; 6744f3187195STejun Heo 6745f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 6746cca3974eSJeff Garzik ap->lock = &host->lock; 6747c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 6748f3187195STejun Heo ap->print_id = -1; 6749c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 6750cca3974eSJeff Garzik ap->host = host; 6751f3187195STejun Heo ap->dev = host->dev; 6752c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 6753c6fd2807SJeff Garzik 6754c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 6755c6fd2807SJeff Garzik /* turn on all debugging levels */ 6756c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 6757c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 6758c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 6759c6fd2807SJeff Garzik #else 6760c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 6761c6fd2807SJeff Garzik #endif 6762c6fd2807SJeff Garzik 6763442eacc3SJeff Garzik INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); 676465f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 676565f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 6766c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 6767c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 67685ddf24c5STejun Heo init_timer_deferrable(&ap->fastdrain_timer); 67695ddf24c5STejun Heo ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 67705ddf24c5STejun Heo ap->fastdrain_timer.data = (unsigned long)ap; 6771c6fd2807SJeff Garzik 6772c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 6773c6fd2807SJeff Garzik 67748989805dSTejun Heo ata_link_init(ap, &ap->link, 0); 6775c6fd2807SJeff Garzik 6776c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 6777c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 6778c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 6779c6fd2807SJeff Garzik #endif 6780c6fd2807SJeff Garzik return ap; 6781c6fd2807SJeff Garzik } 6782c6fd2807SJeff Garzik 6783f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 6784f0d36efdSTejun Heo { 6785f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 6786f0d36efdSTejun Heo int i; 6787f0d36efdSTejun Heo 6788f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 6789f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 6790f0d36efdSTejun Heo 6791ecef7253STejun Heo if (!ap) 6792ecef7253STejun Heo continue; 6793ecef7253STejun Heo 67944911487aSTejun Heo if (ap->scsi_host) 67951aa506e4STejun Heo scsi_host_put(ap->scsi_host); 67961aa506e4STejun Heo 6797633273a3STejun Heo kfree(ap->pmp_link); 67984911487aSTejun Heo kfree(ap); 67991aa506e4STejun Heo host->ports[i] = NULL; 68001aa506e4STejun Heo } 68011aa506e4STejun Heo 68021aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 6803f0d36efdSTejun Heo } 6804f0d36efdSTejun Heo 6805c6fd2807SJeff Garzik /** 6806f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 6807f3187195STejun Heo * @dev: generic device this host is associated with 6808f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 6809f3187195STejun Heo * 6810f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 6811f3187195STejun Heo * this function to allocate a host, initializes it fully and 6812f3187195STejun Heo * attaches it using ata_host_register(). 6813f3187195STejun Heo * 6814f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 6815f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 6816f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 6817f3187195STejun Heo * ports will be automatically freed on registration. 6818f3187195STejun Heo * 6819f3187195STejun Heo * RETURNS: 6820f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 6821f3187195STejun Heo * 6822f3187195STejun Heo * LOCKING: 6823f3187195STejun Heo * Inherited from calling layer (may sleep). 6824f3187195STejun Heo */ 6825f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 6826f3187195STejun Heo { 6827f3187195STejun Heo struct ata_host *host; 6828f3187195STejun Heo size_t sz; 6829f3187195STejun Heo int i; 6830f3187195STejun Heo 6831f3187195STejun Heo DPRINTK("ENTER\n"); 6832f3187195STejun Heo 6833f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 6834f3187195STejun Heo return NULL; 6835f3187195STejun Heo 6836f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6837f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 6838f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6839f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 6840f3187195STejun Heo if (!host) 6841f3187195STejun Heo goto err_out; 6842f3187195STejun Heo 6843f3187195STejun Heo devres_add(dev, host); 6844f3187195STejun Heo dev_set_drvdata(dev, host); 6845f3187195STejun Heo 6846f3187195STejun Heo spin_lock_init(&host->lock); 6847f3187195STejun Heo host->dev = dev; 6848f3187195STejun Heo host->n_ports = max_ports; 6849f3187195STejun Heo 6850f3187195STejun Heo /* allocate ports bound to this host */ 6851f3187195STejun Heo for (i = 0; i < max_ports; i++) { 6852f3187195STejun Heo struct ata_port *ap; 6853f3187195STejun Heo 6854f3187195STejun Heo ap = ata_port_alloc(host); 6855f3187195STejun Heo if (!ap) 6856f3187195STejun Heo goto err_out; 6857f3187195STejun Heo 6858f3187195STejun Heo ap->port_no = i; 6859f3187195STejun Heo host->ports[i] = ap; 6860f3187195STejun Heo } 6861f3187195STejun Heo 6862f3187195STejun Heo devres_remove_group(dev, NULL); 6863f3187195STejun Heo return host; 6864f3187195STejun Heo 6865f3187195STejun Heo err_out: 6866f3187195STejun Heo devres_release_group(dev, NULL); 6867f3187195STejun Heo return NULL; 6868f3187195STejun Heo } 6869f3187195STejun Heo 6870f3187195STejun Heo /** 6871f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 6872f5cda257STejun Heo * @dev: generic device this host is associated with 6873f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 6874f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 6875f5cda257STejun Heo * 6876f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 6877f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 6878f5cda257STejun Heo * last entry will be used for the remaining ports. 6879f5cda257STejun Heo * 6880f5cda257STejun Heo * RETURNS: 6881f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 6882f5cda257STejun Heo * 6883f5cda257STejun Heo * LOCKING: 6884f5cda257STejun Heo * Inherited from calling layer (may sleep). 6885f5cda257STejun Heo */ 6886f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 6887f5cda257STejun Heo const struct ata_port_info * const * ppi, 6888f5cda257STejun Heo int n_ports) 6889f5cda257STejun Heo { 6890f5cda257STejun Heo const struct ata_port_info *pi; 6891f5cda257STejun Heo struct ata_host *host; 6892f5cda257STejun Heo int i, j; 6893f5cda257STejun Heo 6894f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 6895f5cda257STejun Heo if (!host) 6896f5cda257STejun Heo return NULL; 6897f5cda257STejun Heo 6898f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 6899f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 6900f5cda257STejun Heo 6901f5cda257STejun Heo if (ppi[j]) 6902f5cda257STejun Heo pi = ppi[j++]; 6903f5cda257STejun Heo 6904f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 6905f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 6906f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 6907f5cda257STejun Heo ap->flags |= pi->flags; 69080c88758bSTejun Heo ap->link.flags |= pi->link_flags; 6909f5cda257STejun Heo ap->ops = pi->port_ops; 6910f5cda257STejun Heo 6911f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 6912f5cda257STejun Heo host->ops = pi->port_ops; 6913f5cda257STejun Heo if (!host->private_data && pi->private_data) 6914f5cda257STejun Heo host->private_data = pi->private_data; 6915f5cda257STejun Heo } 6916f5cda257STejun Heo 6917f5cda257STejun Heo return host; 6918f5cda257STejun Heo } 6919f5cda257STejun Heo 692032ebbc0cSTejun Heo static void ata_host_stop(struct device *gendev, void *res) 692132ebbc0cSTejun Heo { 692232ebbc0cSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 692332ebbc0cSTejun Heo int i; 692432ebbc0cSTejun Heo 692532ebbc0cSTejun Heo WARN_ON(!(host->flags & ATA_HOST_STARTED)); 692632ebbc0cSTejun Heo 692732ebbc0cSTejun Heo for (i = 0; i < host->n_ports; i++) { 692832ebbc0cSTejun Heo struct ata_port *ap = host->ports[i]; 692932ebbc0cSTejun Heo 693032ebbc0cSTejun Heo if (ap->ops->port_stop) 693132ebbc0cSTejun Heo ap->ops->port_stop(ap); 693232ebbc0cSTejun Heo } 693332ebbc0cSTejun Heo 693432ebbc0cSTejun Heo if (host->ops->host_stop) 693532ebbc0cSTejun Heo host->ops->host_stop(host); 693632ebbc0cSTejun Heo } 693732ebbc0cSTejun Heo 6938f5cda257STejun Heo /** 6939ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 6940ecef7253STejun Heo * @host: ATA host to start ports for 6941ecef7253STejun Heo * 6942ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 6943ecef7253STejun Heo * recorded in host->flags, so this function can be called 6944ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 6945f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 6946f3187195STejun Heo * first non-dummy port ops. 6947ecef7253STejun Heo * 6948ecef7253STejun Heo * LOCKING: 6949ecef7253STejun Heo * Inherited from calling layer (may sleep). 6950ecef7253STejun Heo * 6951ecef7253STejun Heo * RETURNS: 6952ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 6953ecef7253STejun Heo */ 6954ecef7253STejun Heo int ata_host_start(struct ata_host *host) 6955ecef7253STejun Heo { 695632ebbc0cSTejun Heo int have_stop = 0; 695732ebbc0cSTejun Heo void *start_dr = NULL; 6958ecef7253STejun Heo int i, rc; 6959ecef7253STejun Heo 6960ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 6961ecef7253STejun Heo return 0; 6962ecef7253STejun Heo 6963ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 6964ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6965ecef7253STejun Heo 6966f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 6967f3187195STejun Heo host->ops = ap->ops; 6968f3187195STejun Heo 696932ebbc0cSTejun Heo if (ap->ops->port_stop) 697032ebbc0cSTejun Heo have_stop = 1; 697132ebbc0cSTejun Heo } 697232ebbc0cSTejun Heo 697332ebbc0cSTejun Heo if (host->ops->host_stop) 697432ebbc0cSTejun Heo have_stop = 1; 697532ebbc0cSTejun Heo 697632ebbc0cSTejun Heo if (have_stop) { 697732ebbc0cSTejun Heo start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 697832ebbc0cSTejun Heo if (!start_dr) 697932ebbc0cSTejun Heo return -ENOMEM; 698032ebbc0cSTejun Heo } 698132ebbc0cSTejun Heo 698232ebbc0cSTejun Heo for (i = 0; i < host->n_ports; i++) { 698332ebbc0cSTejun Heo struct ata_port *ap = host->ports[i]; 698432ebbc0cSTejun Heo 6985ecef7253STejun Heo if (ap->ops->port_start) { 6986ecef7253STejun Heo rc = ap->ops->port_start(ap); 6987ecef7253STejun Heo if (rc) { 69880f9fe9b7SAlan Cox if (rc != -ENODEV) 69890f757743SAndrew Morton dev_printk(KERN_ERR, host->dev, 69900f757743SAndrew Morton "failed to start port %d " 69910f757743SAndrew Morton "(errno=%d)\n", i, rc); 6992ecef7253STejun Heo goto err_out; 6993ecef7253STejun Heo } 6994ecef7253STejun Heo } 6995ecef7253STejun Heo ata_eh_freeze_port(ap); 6996ecef7253STejun Heo } 6997ecef7253STejun Heo 699832ebbc0cSTejun Heo if (start_dr) 699932ebbc0cSTejun Heo devres_add(host->dev, start_dr); 7000ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 7001ecef7253STejun Heo return 0; 7002ecef7253STejun Heo 7003ecef7253STejun Heo err_out: 7004ecef7253STejun Heo while (--i >= 0) { 7005ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 7006ecef7253STejun Heo 7007ecef7253STejun Heo if (ap->ops->port_stop) 7008ecef7253STejun Heo ap->ops->port_stop(ap); 7009ecef7253STejun Heo } 701032ebbc0cSTejun Heo devres_free(start_dr); 7011ecef7253STejun Heo return rc; 7012ecef7253STejun Heo } 7013ecef7253STejun Heo 7014ecef7253STejun Heo /** 7015cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 7016cca3974eSJeff Garzik * @host: host to initialize 7017cca3974eSJeff Garzik * @dev: device host is attached to 7018cca3974eSJeff Garzik * @flags: host flags 7019c6fd2807SJeff Garzik * @ops: port_ops 7020c6fd2807SJeff Garzik * 7021c6fd2807SJeff Garzik * LOCKING: 7022c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 7023c6fd2807SJeff Garzik * 7024c6fd2807SJeff Garzik */ 7025f3187195STejun Heo /* KILLME - the only user left is ipr */ 7026cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 7027cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 7028c6fd2807SJeff Garzik { 7029cca3974eSJeff Garzik spin_lock_init(&host->lock); 7030cca3974eSJeff Garzik host->dev = dev; 7031cca3974eSJeff Garzik host->flags = flags; 7032cca3974eSJeff Garzik host->ops = ops; 7033c6fd2807SJeff Garzik } 7034c6fd2807SJeff Garzik 7035c6fd2807SJeff Garzik /** 7036f3187195STejun Heo * ata_host_register - register initialized ATA host 7037f3187195STejun Heo * @host: ATA host to register 7038f3187195STejun Heo * @sht: template for SCSI host 7039c6fd2807SJeff Garzik * 7040f3187195STejun Heo * Register initialized ATA host. @host is allocated using 7041f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 7042f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 7043f3187195STejun Heo * probe registered devices. 7044c6fd2807SJeff Garzik * 7045c6fd2807SJeff Garzik * LOCKING: 7046f3187195STejun Heo * Inherited from calling layer (may sleep). 7047c6fd2807SJeff Garzik * 7048c6fd2807SJeff Garzik * RETURNS: 7049f3187195STejun Heo * 0 on success, -errno otherwise. 7050c6fd2807SJeff Garzik */ 7051f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 7052c6fd2807SJeff Garzik { 7053f3187195STejun Heo int i, rc; 7054c6fd2807SJeff Garzik 7055f3187195STejun Heo /* host must have been started */ 7056f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 7057f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 7058f3187195STejun Heo "BUG: trying to register unstarted host\n"); 7059f3187195STejun Heo WARN_ON(1); 7060f3187195STejun Heo return -EINVAL; 706102f076aaSAlan Cox } 7062f0d36efdSTejun Heo 7063f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 7064f3187195STejun Heo * determine the exact number of ports to allocate at 7065f3187195STejun Heo * allocation time. 7066f3187195STejun Heo */ 7067f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 7068f3187195STejun Heo kfree(host->ports[i]); 7069f0d36efdSTejun Heo 7070f3187195STejun Heo /* give ports names and add SCSI hosts */ 7071f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 7072f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 7073c6fd2807SJeff Garzik 7074f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 7075ecef7253STejun Heo if (rc) 7076f3187195STejun Heo return rc; 7077ecef7253STejun Heo 7078fafbae87STejun Heo /* associate with ACPI nodes */ 7079fafbae87STejun Heo ata_acpi_associate(host); 7080fafbae87STejun Heo 7081f3187195STejun Heo /* set cable, sata_spd_limit and report */ 7082cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 7083cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 7084f3187195STejun Heo unsigned long xfer_mask; 7085f3187195STejun Heo 7086f3187195STejun Heo /* set SATA cable type if still unset */ 7087f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 7088f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 7089c6fd2807SJeff Garzik 7090c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 70914fb37a25STejun Heo sata_link_init_spd(&ap->link); 7092c6fd2807SJeff Garzik 7093cbcdd875STejun Heo /* print per-port info to dmesg */ 7094f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 7095f3187195STejun Heo ap->udma_mask); 7096f3187195STejun Heo 7097abf6e8edSTejun Heo if (!ata_port_is_dummy(ap)) { 7098cbcdd875STejun Heo ata_port_printk(ap, KERN_INFO, 7099cbcdd875STejun Heo "%cATA max %s %s\n", 7100a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 7101f3187195STejun Heo ata_mode_string(xfer_mask), 7102cbcdd875STejun Heo ap->link.eh_info.desc); 7103abf6e8edSTejun Heo ata_ehi_clear_desc(&ap->link.eh_info); 7104abf6e8edSTejun Heo } else 7105f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 7106c6fd2807SJeff Garzik } 7107c6fd2807SJeff Garzik 7108f3187195STejun Heo /* perform each probe synchronously */ 7109f3187195STejun Heo DPRINTK("probe begin\n"); 7110f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 7111f3187195STejun Heo struct ata_port *ap = host->ports[i]; 7112f3187195STejun Heo 7113f3187195STejun Heo /* probe */ 7114c6fd2807SJeff Garzik if (ap->ops->error_handler) { 71159af5c9c9STejun Heo struct ata_eh_info *ehi = &ap->link.eh_info; 7116c6fd2807SJeff Garzik unsigned long flags; 7117c6fd2807SJeff Garzik 7118c6fd2807SJeff Garzik ata_port_probe(ap); 7119c6fd2807SJeff Garzik 7120c6fd2807SJeff Garzik /* kick EH for boot probing */ 7121c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 7122c6fd2807SJeff Garzik 7123f58229f8STejun Heo ehi->probe_mask = 7124f58229f8STejun Heo (1 << ata_link_max_devices(&ap->link)) - 1; 7125c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 7126c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 7127c6fd2807SJeff Garzik 7128f4d6d004STejun Heo ap->pflags &= ~ATA_PFLAG_INITIALIZING; 7129c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 7130c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 7131c6fd2807SJeff Garzik 7132c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 7133c6fd2807SJeff Garzik 7134c6fd2807SJeff Garzik /* wait for EH to finish */ 7135c6fd2807SJeff Garzik ata_port_wait_eh(ap); 7136c6fd2807SJeff Garzik } else { 713744877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 7138c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 713944877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 7140c6fd2807SJeff Garzik 7141c6fd2807SJeff Garzik if (rc) { 7142c6fd2807SJeff Garzik /* FIXME: do something useful here? 7143c6fd2807SJeff Garzik * Current libata behavior will 7144c6fd2807SJeff Garzik * tear down everything when 7145c6fd2807SJeff Garzik * the module is removed 7146c6fd2807SJeff Garzik * or the h/w is unplugged. 7147c6fd2807SJeff Garzik */ 7148c6fd2807SJeff Garzik } 7149c6fd2807SJeff Garzik } 7150c6fd2807SJeff Garzik } 7151c6fd2807SJeff Garzik 7152c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 7153c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 7154cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 7155cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 7156c6fd2807SJeff Garzik 71571ae46317STejun Heo ata_scsi_scan_host(ap, 1); 7158ca77329fSKristen Carlson Accardi ata_lpm_schedule(ap, ap->pm_policy); 7159c6fd2807SJeff Garzik } 7160c6fd2807SJeff Garzik 7161f3187195STejun Heo return 0; 7162f3187195STejun Heo } 7163f3187195STejun Heo 7164f3187195STejun Heo /** 7165f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 7166f5cda257STejun Heo * @host: target ATA host 7167f5cda257STejun Heo * @irq: IRQ to request 7168f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 7169f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 7170f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 7171f5cda257STejun Heo * 7172f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 7173f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 7174f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 7175f5cda257STejun Heo * arguments and performs the three steps in one go. 7176f5cda257STejun Heo * 71773d46b2e2SPaul Mundt * An invalid IRQ skips the IRQ registration and expects the host to 71783d46b2e2SPaul Mundt * have set polling mode on the port. In this case, @irq_handler 71793d46b2e2SPaul Mundt * should be NULL. 71803d46b2e2SPaul Mundt * 7181f5cda257STejun Heo * LOCKING: 7182f5cda257STejun Heo * Inherited from calling layer (may sleep). 7183f5cda257STejun Heo * 7184f5cda257STejun Heo * RETURNS: 7185f5cda257STejun Heo * 0 on success, -errno otherwise. 7186f5cda257STejun Heo */ 7187f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 7188f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 7189f5cda257STejun Heo struct scsi_host_template *sht) 7190f5cda257STejun Heo { 7191cbcdd875STejun Heo int i, rc; 7192f5cda257STejun Heo 7193f5cda257STejun Heo rc = ata_host_start(host); 7194f5cda257STejun Heo if (rc) 7195f5cda257STejun Heo return rc; 7196f5cda257STejun Heo 71973d46b2e2SPaul Mundt /* Special case for polling mode */ 71983d46b2e2SPaul Mundt if (!irq) { 71993d46b2e2SPaul Mundt WARN_ON(irq_handler); 72003d46b2e2SPaul Mundt return ata_host_register(host, sht); 72013d46b2e2SPaul Mundt } 72023d46b2e2SPaul Mundt 7203f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 7204f5cda257STejun Heo dev_driver_string(host->dev), host); 7205f5cda257STejun Heo if (rc) 7206f5cda257STejun Heo return rc; 7207f5cda257STejun Heo 7208cbcdd875STejun Heo for (i = 0; i < host->n_ports; i++) 7209cbcdd875STejun Heo ata_port_desc(host->ports[i], "irq %d", irq); 72104031826bSTejun Heo 7211f5cda257STejun Heo rc = ata_host_register(host, sht); 7212f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 7213f5cda257STejun Heo if (rc) 7214f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 7215f5cda257STejun Heo 7216f5cda257STejun Heo return rc; 7217f5cda257STejun Heo } 7218f5cda257STejun Heo 7219f5cda257STejun Heo /** 7220c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 7221c6fd2807SJeff Garzik * @ap: ATA port to be detached 7222c6fd2807SJeff Garzik * 7223c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 7224c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 7225c6fd2807SJeff Garzik * be quiescent on return from this function. 7226c6fd2807SJeff Garzik * 7227c6fd2807SJeff Garzik * LOCKING: 7228c6fd2807SJeff Garzik * Kernel thread context (may sleep). 7229c6fd2807SJeff Garzik */ 7230741b7763SAdrian Bunk static void ata_port_detach(struct ata_port *ap) 7231c6fd2807SJeff Garzik { 7232c6fd2807SJeff Garzik unsigned long flags; 723341bda9c9STejun Heo struct ata_link *link; 7234f58229f8STejun Heo struct ata_device *dev; 7235c6fd2807SJeff Garzik 7236c6fd2807SJeff Garzik if (!ap->ops->error_handler) 7237c6fd2807SJeff Garzik goto skip_eh; 7238c6fd2807SJeff Garzik 7239c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 7240c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 7241c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 7242c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 7243c6fd2807SJeff Garzik 7244c6fd2807SJeff Garzik ata_port_wait_eh(ap); 7245c6fd2807SJeff Garzik 72467f9ad9b8STejun Heo /* EH is now guaranteed to see UNLOADING - EH context belongs 72477f9ad9b8STejun Heo * to us. Disable all existing devices. 7248c6fd2807SJeff Garzik */ 724941bda9c9STejun Heo ata_port_for_each_link(link, ap) { 725041bda9c9STejun Heo ata_link_for_each_dev(dev, link) 7251f58229f8STejun Heo ata_dev_disable(dev); 725241bda9c9STejun Heo } 7253c6fd2807SJeff Garzik 7254c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 7255c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 7256c6fd2807SJeff Garzik * target. 7257c6fd2807SJeff Garzik */ 7258c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 7259c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 7260c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 7261c6fd2807SJeff Garzik 7262c6fd2807SJeff Garzik ata_port_wait_eh(ap); 726345a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 7264c6fd2807SJeff Garzik 7265c6fd2807SJeff Garzik skip_eh: 7266c6fd2807SJeff Garzik /* remove the associated SCSI host */ 7267cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 7268c6fd2807SJeff Garzik } 7269c6fd2807SJeff Garzik 7270c6fd2807SJeff Garzik /** 72710529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 72720529c159STejun Heo * @host: Host to detach 72730529c159STejun Heo * 72740529c159STejun Heo * Detach all ports of @host. 72750529c159STejun Heo * 72760529c159STejun Heo * LOCKING: 72770529c159STejun Heo * Kernel thread context (may sleep). 72780529c159STejun Heo */ 72790529c159STejun Heo void ata_host_detach(struct ata_host *host) 72800529c159STejun Heo { 72810529c159STejun Heo int i; 72820529c159STejun Heo 72830529c159STejun Heo for (i = 0; i < host->n_ports; i++) 72840529c159STejun Heo ata_port_detach(host->ports[i]); 7285562f0c2dSTejun Heo 7286562f0c2dSTejun Heo /* the host is dead now, dissociate ACPI */ 7287562f0c2dSTejun Heo ata_acpi_dissociate(host); 72880529c159STejun Heo } 72890529c159STejun Heo 7290c6fd2807SJeff Garzik /** 7291c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 7292c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 7293c6fd2807SJeff Garzik * 7294c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 7295c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 7296c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 7297c6fd2807SJeff Garzik * relative to cmd_addr. 7298c6fd2807SJeff Garzik * 7299c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 7300c6fd2807SJeff Garzik */ 7301c6fd2807SJeff Garzik 7302c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 7303c6fd2807SJeff Garzik { 7304c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 7305c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 7306c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 7307c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 7308c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 7309c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 7310c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 7311c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 7312c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 7313c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 7314c6fd2807SJeff Garzik } 7315c6fd2807SJeff Garzik 7316c6fd2807SJeff Garzik 7317c6fd2807SJeff Garzik #ifdef CONFIG_PCI 7318c6fd2807SJeff Garzik 7319c6fd2807SJeff Garzik /** 7320c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 7321c6fd2807SJeff Garzik * @pdev: PCI device that was removed 7322c6fd2807SJeff Garzik * 7323b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 7324b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 7325b878ca5dSTejun Heo * release is handled via devres. 7326c6fd2807SJeff Garzik * 7327c6fd2807SJeff Garzik * LOCKING: 7328c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 7329c6fd2807SJeff Garzik */ 7330c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 7331c6fd2807SJeff Garzik { 73322855568bSJeff Garzik struct device *dev = &pdev->dev; 7333cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 7334c6fd2807SJeff Garzik 7335f0d36efdSTejun Heo ata_host_detach(host); 7336c6fd2807SJeff Garzik } 7337c6fd2807SJeff Garzik 7338c6fd2807SJeff Garzik /* move to PCI subsystem */ 7339c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 7340c6fd2807SJeff Garzik { 7341c6fd2807SJeff Garzik unsigned long tmp = 0; 7342c6fd2807SJeff Garzik 7343c6fd2807SJeff Garzik switch (bits->width) { 7344c6fd2807SJeff Garzik case 1: { 7345c6fd2807SJeff Garzik u8 tmp8 = 0; 7346c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 7347c6fd2807SJeff Garzik tmp = tmp8; 7348c6fd2807SJeff Garzik break; 7349c6fd2807SJeff Garzik } 7350c6fd2807SJeff Garzik case 2: { 7351c6fd2807SJeff Garzik u16 tmp16 = 0; 7352c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 7353c6fd2807SJeff Garzik tmp = tmp16; 7354c6fd2807SJeff Garzik break; 7355c6fd2807SJeff Garzik } 7356c6fd2807SJeff Garzik case 4: { 7357c6fd2807SJeff Garzik u32 tmp32 = 0; 7358c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 7359c6fd2807SJeff Garzik tmp = tmp32; 7360c6fd2807SJeff Garzik break; 7361c6fd2807SJeff Garzik } 7362c6fd2807SJeff Garzik 7363c6fd2807SJeff Garzik default: 7364c6fd2807SJeff Garzik return -EINVAL; 7365c6fd2807SJeff Garzik } 7366c6fd2807SJeff Garzik 7367c6fd2807SJeff Garzik tmp &= bits->mask; 7368c6fd2807SJeff Garzik 7369c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 7370c6fd2807SJeff Garzik } 7371c6fd2807SJeff Garzik 73726ffa01d8STejun Heo #ifdef CONFIG_PM 7373c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 7374c6fd2807SJeff Garzik { 7375c6fd2807SJeff Garzik pci_save_state(pdev); 7376c6fd2807SJeff Garzik pci_disable_device(pdev); 73774c90d971STejun Heo 73783a2d5b70SRafael J. Wysocki if (mesg.event & PM_EVENT_SLEEP) 7379c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 7380c6fd2807SJeff Garzik } 7381c6fd2807SJeff Garzik 7382553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 7383c6fd2807SJeff Garzik { 7384553c4aa6STejun Heo int rc; 7385553c4aa6STejun Heo 7386c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 7387c6fd2807SJeff Garzik pci_restore_state(pdev); 7388553c4aa6STejun Heo 7389f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 7390553c4aa6STejun Heo if (rc) { 7391553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 7392553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 7393553c4aa6STejun Heo return rc; 7394553c4aa6STejun Heo } 7395553c4aa6STejun Heo 7396c6fd2807SJeff Garzik pci_set_master(pdev); 7397553c4aa6STejun Heo return 0; 7398c6fd2807SJeff Garzik } 7399c6fd2807SJeff Garzik 7400c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 7401c6fd2807SJeff Garzik { 7402cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 7403c6fd2807SJeff Garzik int rc = 0; 7404c6fd2807SJeff Garzik 7405cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 7406c6fd2807SJeff Garzik if (rc) 7407c6fd2807SJeff Garzik return rc; 7408c6fd2807SJeff Garzik 7409c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 7410c6fd2807SJeff Garzik 7411c6fd2807SJeff Garzik return 0; 7412c6fd2807SJeff Garzik } 7413c6fd2807SJeff Garzik 7414c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 7415c6fd2807SJeff Garzik { 7416cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 7417553c4aa6STejun Heo int rc; 7418c6fd2807SJeff Garzik 7419553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 7420553c4aa6STejun Heo if (rc == 0) 7421cca3974eSJeff Garzik ata_host_resume(host); 7422553c4aa6STejun Heo return rc; 7423c6fd2807SJeff Garzik } 74246ffa01d8STejun Heo #endif /* CONFIG_PM */ 74256ffa01d8STejun Heo 7426c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 7427c6fd2807SJeff Garzik 742833267325STejun Heo static int __init ata_parse_force_one(char **cur, 742933267325STejun Heo struct ata_force_ent *force_ent, 743033267325STejun Heo const char **reason) 743133267325STejun Heo { 743233267325STejun Heo /* FIXME: Currently, there's no way to tag init const data and 743333267325STejun Heo * using __initdata causes build failure on some versions of 743433267325STejun Heo * gcc. Once __initdataconst is implemented, add const to the 743533267325STejun Heo * following structure. 743633267325STejun Heo */ 743733267325STejun Heo static struct ata_force_param force_tbl[] __initdata = { 743833267325STejun Heo { "40c", .cbl = ATA_CBL_PATA40 }, 743933267325STejun Heo { "80c", .cbl = ATA_CBL_PATA80 }, 744033267325STejun Heo { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, 744133267325STejun Heo { "unk", .cbl = ATA_CBL_PATA_UNK }, 744233267325STejun Heo { "ign", .cbl = ATA_CBL_PATA_IGN }, 744333267325STejun Heo { "sata", .cbl = ATA_CBL_SATA }, 744433267325STejun Heo { "1.5Gbps", .spd_limit = 1 }, 744533267325STejun Heo { "3.0Gbps", .spd_limit = 2 }, 744633267325STejun Heo { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, 744733267325STejun Heo { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, 744833267325STejun Heo { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, 744933267325STejun Heo { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, 745033267325STejun Heo { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, 745133267325STejun Heo { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, 745233267325STejun Heo { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, 745333267325STejun Heo { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, 745433267325STejun Heo { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, 745533267325STejun Heo { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, 745633267325STejun Heo { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, 745733267325STejun Heo { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, 745833267325STejun Heo { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, 745933267325STejun Heo { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, 746033267325STejun Heo { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 746133267325STejun Heo { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 746233267325STejun Heo { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 746333267325STejun Heo { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 746433267325STejun Heo { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 746533267325STejun Heo { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 746633267325STejun Heo { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 746733267325STejun Heo { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 746833267325STejun Heo { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 746933267325STejun Heo { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 747033267325STejun Heo { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 747133267325STejun Heo { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 747233267325STejun Heo { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 747333267325STejun Heo { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 747433267325STejun Heo { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 747533267325STejun Heo { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 747633267325STejun Heo { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 747733267325STejun Heo { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 747833267325STejun Heo { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 747933267325STejun Heo { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 748033267325STejun Heo { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 748133267325STejun Heo { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, 748233267325STejun Heo }; 748333267325STejun Heo char *start = *cur, *p = *cur; 748433267325STejun Heo char *id, *val, *endp; 748533267325STejun Heo const struct ata_force_param *match_fp = NULL; 748633267325STejun Heo int nr_matches = 0, i; 748733267325STejun Heo 748833267325STejun Heo /* find where this param ends and update *cur */ 748933267325STejun Heo while (*p != '\0' && *p != ',') 749033267325STejun Heo p++; 749133267325STejun Heo 749233267325STejun Heo if (*p == '\0') 749333267325STejun Heo *cur = p; 749433267325STejun Heo else 749533267325STejun Heo *cur = p + 1; 749633267325STejun Heo 749733267325STejun Heo *p = '\0'; 749833267325STejun Heo 749933267325STejun Heo /* parse */ 750033267325STejun Heo p = strchr(start, ':'); 750133267325STejun Heo if (!p) { 750233267325STejun Heo val = strstrip(start); 750333267325STejun Heo goto parse_val; 750433267325STejun Heo } 750533267325STejun Heo *p = '\0'; 750633267325STejun Heo 750733267325STejun Heo id = strstrip(start); 750833267325STejun Heo val = strstrip(p + 1); 750933267325STejun Heo 751033267325STejun Heo /* parse id */ 751133267325STejun Heo p = strchr(id, '.'); 751233267325STejun Heo if (p) { 751333267325STejun Heo *p++ = '\0'; 751433267325STejun Heo force_ent->device = simple_strtoul(p, &endp, 10); 751533267325STejun Heo if (p == endp || *endp != '\0') { 751633267325STejun Heo *reason = "invalid device"; 751733267325STejun Heo return -EINVAL; 751833267325STejun Heo } 751933267325STejun Heo } 752033267325STejun Heo 752133267325STejun Heo force_ent->port = simple_strtoul(id, &endp, 10); 752233267325STejun Heo if (p == endp || *endp != '\0') { 752333267325STejun Heo *reason = "invalid port/link"; 752433267325STejun Heo return -EINVAL; 752533267325STejun Heo } 752633267325STejun Heo 752733267325STejun Heo parse_val: 752833267325STejun Heo /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ 752933267325STejun Heo for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 753033267325STejun Heo const struct ata_force_param *fp = &force_tbl[i]; 753133267325STejun Heo 753233267325STejun Heo if (strncasecmp(val, fp->name, strlen(val))) 753333267325STejun Heo continue; 753433267325STejun Heo 753533267325STejun Heo nr_matches++; 753633267325STejun Heo match_fp = fp; 753733267325STejun Heo 753833267325STejun Heo if (strcasecmp(val, fp->name) == 0) { 753933267325STejun Heo nr_matches = 1; 754033267325STejun Heo break; 754133267325STejun Heo } 754233267325STejun Heo } 754333267325STejun Heo 754433267325STejun Heo if (!nr_matches) { 754533267325STejun Heo *reason = "unknown value"; 754633267325STejun Heo return -EINVAL; 754733267325STejun Heo } 754833267325STejun Heo if (nr_matches > 1) { 754933267325STejun Heo *reason = "ambigious value"; 755033267325STejun Heo return -EINVAL; 755133267325STejun Heo } 755233267325STejun Heo 755333267325STejun Heo force_ent->param = *match_fp; 755433267325STejun Heo 755533267325STejun Heo return 0; 755633267325STejun Heo } 755733267325STejun Heo 755833267325STejun Heo static void __init ata_parse_force_param(void) 755933267325STejun Heo { 756033267325STejun Heo int idx = 0, size = 1; 756133267325STejun Heo int last_port = -1, last_device = -1; 756233267325STejun Heo char *p, *cur, *next; 756333267325STejun Heo 756433267325STejun Heo /* calculate maximum number of params and allocate force_tbl */ 756533267325STejun Heo for (p = ata_force_param_buf; *p; p++) 756633267325STejun Heo if (*p == ',') 756733267325STejun Heo size++; 756833267325STejun Heo 756933267325STejun Heo ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); 757033267325STejun Heo if (!ata_force_tbl) { 757133267325STejun Heo printk(KERN_WARNING "ata: failed to extend force table, " 757233267325STejun Heo "libata.force ignored\n"); 757333267325STejun Heo return; 757433267325STejun Heo } 757533267325STejun Heo 757633267325STejun Heo /* parse and populate the table */ 757733267325STejun Heo for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 757833267325STejun Heo const char *reason = ""; 757933267325STejun Heo struct ata_force_ent te = { .port = -1, .device = -1 }; 758033267325STejun Heo 758133267325STejun Heo next = cur; 758233267325STejun Heo if (ata_parse_force_one(&next, &te, &reason)) { 758333267325STejun Heo printk(KERN_WARNING "ata: failed to parse force " 758433267325STejun Heo "parameter \"%s\" (%s)\n", 758533267325STejun Heo cur, reason); 758633267325STejun Heo continue; 758733267325STejun Heo } 758833267325STejun Heo 758933267325STejun Heo if (te.port == -1) { 759033267325STejun Heo te.port = last_port; 759133267325STejun Heo te.device = last_device; 759233267325STejun Heo } 759333267325STejun Heo 759433267325STejun Heo ata_force_tbl[idx++] = te; 759533267325STejun Heo 759633267325STejun Heo last_port = te.port; 759733267325STejun Heo last_device = te.device; 759833267325STejun Heo } 759933267325STejun Heo 760033267325STejun Heo ata_force_tbl_size = idx; 760133267325STejun Heo } 7602c6fd2807SJeff Garzik 7603c6fd2807SJeff Garzik static int __init ata_init(void) 7604c6fd2807SJeff Garzik { 7605c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 760633267325STejun Heo 760733267325STejun Heo ata_parse_force_param(); 760833267325STejun Heo 7609c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 7610c6fd2807SJeff Garzik if (!ata_wq) 7611c6fd2807SJeff Garzik return -ENOMEM; 7612c6fd2807SJeff Garzik 7613c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 7614c6fd2807SJeff Garzik if (!ata_aux_wq) { 7615c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 7616c6fd2807SJeff Garzik return -ENOMEM; 7617c6fd2807SJeff Garzik } 7618c6fd2807SJeff Garzik 7619c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 7620c6fd2807SJeff Garzik return 0; 7621c6fd2807SJeff Garzik } 7622c6fd2807SJeff Garzik 7623c6fd2807SJeff Garzik static void __exit ata_exit(void) 7624c6fd2807SJeff Garzik { 762533267325STejun Heo kfree(ata_force_tbl); 7626c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 7627c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 7628c6fd2807SJeff Garzik } 7629c6fd2807SJeff Garzik 7630a4625085SBrian King subsys_initcall(ata_init); 7631c6fd2807SJeff Garzik module_exit(ata_exit); 7632c6fd2807SJeff Garzik 7633c6fd2807SJeff Garzik static unsigned long ratelimit_time; 7634c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 7635c6fd2807SJeff Garzik 7636c6fd2807SJeff Garzik int ata_ratelimit(void) 7637c6fd2807SJeff Garzik { 7638c6fd2807SJeff Garzik int rc; 7639c6fd2807SJeff Garzik unsigned long flags; 7640c6fd2807SJeff Garzik 7641c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 7642c6fd2807SJeff Garzik 7643c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 7644c6fd2807SJeff Garzik rc = 1; 7645c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 7646c6fd2807SJeff Garzik } else 7647c6fd2807SJeff Garzik rc = 0; 7648c6fd2807SJeff Garzik 7649c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 7650c6fd2807SJeff Garzik 7651c6fd2807SJeff Garzik return rc; 7652c6fd2807SJeff Garzik } 7653c6fd2807SJeff Garzik 7654c6fd2807SJeff Garzik /** 7655c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 7656c6fd2807SJeff Garzik * @reg: IO-mapped register 7657c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 7658c6fd2807SJeff Garzik * @val: Wait condition 7659c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 7660c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 7661c6fd2807SJeff Garzik * 7662c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 7663c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 7664c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 7665c6fd2807SJeff Garzik * 7666c6fd2807SJeff Garzik * (*@reg & mask) != val 7667c6fd2807SJeff Garzik * 7668c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 7669c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 7670c6fd2807SJeff Garzik * 7671c6fd2807SJeff Garzik * LOCKING: 7672c6fd2807SJeff Garzik * Kernel thread context (may sleep) 7673c6fd2807SJeff Garzik * 7674c6fd2807SJeff Garzik * RETURNS: 7675c6fd2807SJeff Garzik * The final register value. 7676c6fd2807SJeff Garzik */ 7677c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 7678c6fd2807SJeff Garzik unsigned long interval_msec, 7679c6fd2807SJeff Garzik unsigned long timeout_msec) 7680c6fd2807SJeff Garzik { 7681c6fd2807SJeff Garzik unsigned long timeout; 7682c6fd2807SJeff Garzik u32 tmp; 7683c6fd2807SJeff Garzik 7684c6fd2807SJeff Garzik tmp = ioread32(reg); 7685c6fd2807SJeff Garzik 7686c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 7687c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 7688c6fd2807SJeff Garzik * eat away the timeout. 7689c6fd2807SJeff Garzik */ 7690c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 7691c6fd2807SJeff Garzik 7692c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 7693c6fd2807SJeff Garzik msleep(interval_msec); 7694c6fd2807SJeff Garzik tmp = ioread32(reg); 7695c6fd2807SJeff Garzik } 7696c6fd2807SJeff Garzik 7697c6fd2807SJeff Garzik return tmp; 7698c6fd2807SJeff Garzik } 7699c6fd2807SJeff Garzik 7700c6fd2807SJeff Garzik /* 7701c6fd2807SJeff Garzik * Dummy port_ops 7702c6fd2807SJeff Garzik */ 7703c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 7704c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 7705c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 7706c6fd2807SJeff Garzik 7707c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 7708c6fd2807SJeff Garzik { 7709c6fd2807SJeff Garzik return ATA_DRDY; 7710c6fd2807SJeff Garzik } 7711c6fd2807SJeff Garzik 7712c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 7713c6fd2807SJeff Garzik { 7714c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 7715c6fd2807SJeff Garzik } 7716c6fd2807SJeff Garzik 7717c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 7718c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 7719c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 7720c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 7721c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 7722c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 7723c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 7724c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 7725c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 7726c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 7727c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 7728c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 7729c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 7730c6fd2807SJeff Garzik }; 7731c6fd2807SJeff Garzik 773221b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 773321b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 773421b0ad4fSTejun Heo }; 773521b0ad4fSTejun Heo 7736c6fd2807SJeff Garzik /* 7737c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 7738c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 7739c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 7740c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 7741c6fd2807SJeff Garzik */ 7742c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 7743c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 7744c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 7745c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 774621b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 7747c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 7748c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 7749cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 7750f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 7751f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 7752ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 7753f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 7754f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 77550529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 7756c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 7757c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 7758c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 7759c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 7760c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 7761c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 7762c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 7763c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 7764c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 776543727fbcSJeff Garzik EXPORT_SYMBOL_GPL(sata_print_link_status); 7766c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 7767c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 77686357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_pack_xfermask); 77696357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_unpack_xfermask); 77706357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 77716357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 77726357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 77736357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_mode_string); 77746357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_id_xfermask); 7775c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 7776c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 7777c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 7778c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 7779d92e74d3SAlan Cox EXPORT_SYMBOL_GPL(ata_sff_port_start); 7780c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 778104351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 77820d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 77830d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 778431cc23b3STejun Heo EXPORT_SYMBOL_GPL(ata_std_qc_defer); 7785c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 7786d26fc955SAlan Cox EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); 7787c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 7788c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 7789c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 7790c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 7791c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 7792c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 7793c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 7794c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 7795c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 7796c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 7797c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 7798c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 779910305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 7800c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 7801936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_debounce); 7802936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_resume); 7803c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 7804c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 7805c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 7806cc0680a5STejun Heo EXPORT_SYMBOL_GPL(sata_link_hardreset); 7807c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 7808c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 7809c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 7810c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 7811c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 7812c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 7813c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 7814c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 781588ff6eafSTejun Heo EXPORT_SYMBOL_GPL(ata_wait_after_reset); 7816d4b2bab4STejun Heo EXPORT_SYMBOL_GPL(ata_wait_ready); 7817c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 7818c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 7819c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 7820c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 7821c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 7822c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 7823c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 7824c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 7825c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 7826c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 7827936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_online); 7828936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_offline); 78296ffa01d8STejun Heo #ifdef CONFIG_PM 7830cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 7831cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 78326ffa01d8STejun Heo #endif /* CONFIG_PM */ 7833c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 7834c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 7835c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 7836c6fd2807SJeff Garzik 7837c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 78386357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_timing_find_mode); 7839c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 7840c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 7841a0f79b92STejun Heo EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); 7842c6fd2807SJeff Garzik 7843c6fd2807SJeff Garzik #ifdef CONFIG_PCI 7844c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 7845d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); 78461626aeb8STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); 7847d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); 78484e6b79faSTejun Heo EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host); 7849c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 7850c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 78516ffa01d8STejun Heo #ifdef CONFIG_PM 7852c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 7853c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 7854c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 7855c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 78566ffa01d8STejun Heo #endif /* CONFIG_PM */ 7857c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 7858c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 7859c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 7860c6fd2807SJeff Garzik 786131f88384STejun Heo EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); 78623af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); 78633af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); 78643af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); 78653af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_do_eh); 78663af9a77aSTejun Heo 7867b64bbc39STejun Heo EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); 7868b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_push_desc); 7869b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); 7870cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_desc); 7871cbcdd875STejun Heo #ifdef CONFIG_PCI 7872cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_pbar_desc); 7873cbcdd875STejun Heo #endif /* CONFIG_PCI */ 7874c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 7875dbd82616STejun Heo EXPORT_SYMBOL_GPL(ata_link_abort); 7876c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 7877c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 78787d77b247STejun Heo EXPORT_SYMBOL_GPL(sata_async_notification); 7879c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 7880c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 7881c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 7882c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 7883c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 788483625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 7885a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 7886be0d18dfSAlan Cox 7887be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 7888be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 7889be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 7890c88f90c3STejun Heo EXPORT_SYMBOL_GPL(ata_cable_ignore); 7891be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 7892