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/spinlock.h> 50c6fd2807SJeff Garzik #include <linux/blkdev.h> 51c6fd2807SJeff Garzik #include <linux/delay.h> 52c6fd2807SJeff Garzik #include <linux/timer.h> 53c6fd2807SJeff Garzik #include <linux/interrupt.h> 54c6fd2807SJeff Garzik #include <linux/completion.h> 55c6fd2807SJeff Garzik #include <linux/suspend.h> 56c6fd2807SJeff Garzik #include <linux/workqueue.h> 57c6fd2807SJeff Garzik #include <linux/scatterlist.h> 582dcb407eSJeff Garzik #include <linux/io.h> 59c6fd2807SJeff Garzik #include <scsi/scsi.h> 60c6fd2807SJeff Garzik #include <scsi/scsi_cmnd.h> 61c6fd2807SJeff Garzik #include <scsi/scsi_host.h> 62c6fd2807SJeff Garzik #include <linux/libata.h> 63c6fd2807SJeff Garzik #include <asm/byteorder.h> 64140b5e59STejun Heo #include <linux/cdrom.h> 65c6fd2807SJeff Garzik 66c6fd2807SJeff Garzik #include "libata.h" 67c6fd2807SJeff Garzik 68fda0efc5SJeff Garzik 69c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 70c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 71c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 72c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 73c6fd2807SJeff Garzik 74029cfd6bSTejun Heo const struct ata_port_operations ata_base_port_ops = { 750aa1113dSTejun Heo .prereset = ata_std_prereset, 76203c75b8STejun Heo .postreset = ata_std_postreset, 77a1efdabaSTejun Heo .error_handler = ata_std_error_handler, 78029cfd6bSTejun Heo }; 79029cfd6bSTejun Heo 80029cfd6bSTejun Heo const struct ata_port_operations sata_port_ops = { 81029cfd6bSTejun Heo .inherits = &ata_base_port_ops, 82029cfd6bSTejun Heo 83029cfd6bSTejun Heo .qc_defer = ata_std_qc_defer, 8457c9efdfSTejun Heo .hardreset = sata_std_hardreset, 85029cfd6bSTejun Heo }; 86029cfd6bSTejun Heo 87c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 88c6fd2807SJeff Garzik u16 heads, u16 sectors); 89c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 90218f3d30SJeff Garzik static unsigned int ata_dev_set_feature(struct ata_device *dev, 91218f3d30SJeff Garzik u8 enable, u8 feature); 92c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 9375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 94c6fd2807SJeff Garzik 95f3187195STejun Heo unsigned int ata_print_id = 1; 96c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 97c6fd2807SJeff Garzik 98c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 99c6fd2807SJeff Garzik 10033267325STejun Heo struct ata_force_param { 10133267325STejun Heo const char *name; 10233267325STejun Heo unsigned int cbl; 10333267325STejun Heo int spd_limit; 10433267325STejun Heo unsigned long xfer_mask; 10533267325STejun Heo unsigned int horkage_on; 10633267325STejun Heo unsigned int horkage_off; 10705944bdfSTejun Heo unsigned int lflags; 10833267325STejun Heo }; 10933267325STejun Heo 11033267325STejun Heo struct ata_force_ent { 11133267325STejun Heo int port; 11233267325STejun Heo int device; 11333267325STejun Heo struct ata_force_param param; 11433267325STejun Heo }; 11533267325STejun Heo 11633267325STejun Heo static struct ata_force_ent *ata_force_tbl; 11733267325STejun Heo static int ata_force_tbl_size; 11833267325STejun Heo 11933267325STejun Heo static char ata_force_param_buf[PAGE_SIZE] __initdata; 1207afb4222STejun Heo /* param_buf is thrown away after initialization, disallow read */ 1217afb4222STejun Heo module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); 12233267325STejun Heo MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); 12333267325STejun Heo 1242486fa56STejun Heo static int atapi_enabled = 1; 125c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 126c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 127c6fd2807SJeff Garzik 128c5c61bdaSAdrian Bunk static int atapi_dmadir = 0; 129c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 130c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 131c6fd2807SJeff Garzik 132baf4fdfaSMark Lord int atapi_passthru16 = 1; 133baf4fdfaSMark Lord module_param(atapi_passthru16, int, 0444); 134baf4fdfaSMark Lord MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); 135baf4fdfaSMark Lord 136c6fd2807SJeff Garzik int libata_fua = 0; 137c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 138c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 139c6fd2807SJeff Garzik 1402dcb407eSJeff Garzik static int ata_ignore_hpa; 1411e999736SAlan Cox module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 1421e999736SAlan Cox MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 1431e999736SAlan Cox 144b3a70601SAlan Cox static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 145b3a70601SAlan Cox module_param_named(dma, libata_dma_mask, int, 0444); 146b3a70601SAlan Cox MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 147b3a70601SAlan Cox 14887fbc5a0STejun Heo static int ata_probe_timeout; 149c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 150c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 151c6fd2807SJeff Garzik 1526ebe9d86SJeff Garzik int libata_noacpi = 0; 153d7d0dad6SJeff Garzik module_param_named(noacpi, libata_noacpi, int, 0444); 1546ebe9d86SJeff Garzik MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); 15511ef697bSKristen Carlson Accardi 156ae8d4ee7SAlan Cox int libata_allow_tpm = 0; 157ae8d4ee7SAlan Cox module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 158ae8d4ee7SAlan Cox MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); 159ae8d4ee7SAlan Cox 160c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 161c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 162c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 163c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 164c6fd2807SJeff Garzik 165c6fd2807SJeff Garzik 166aadffb68STejun Heo /* 167aadffb68STejun Heo * Iterator helpers. Don't use directly. 168aadffb68STejun Heo * 169aadffb68STejun Heo * LOCKING: 170aadffb68STejun Heo * Host lock or EH context. 171aadffb68STejun Heo */ 172aadffb68STejun Heo struct ata_link *__ata_port_next_link(struct ata_port *ap, 173aadffb68STejun Heo struct ata_link *link, bool dev_only) 174aadffb68STejun Heo { 175aadffb68STejun Heo /* NULL link indicates start of iteration */ 176aadffb68STejun Heo if (!link) { 177aadffb68STejun Heo if (dev_only && sata_pmp_attached(ap)) 178aadffb68STejun Heo return ap->pmp_link; 179aadffb68STejun Heo return &ap->link; 180aadffb68STejun Heo } 181aadffb68STejun Heo 182b1c72916STejun Heo /* we just iterated over the host master link, what's next? */ 183b1c72916STejun Heo if (link == &ap->link) { 184b1c72916STejun Heo if (!sata_pmp_attached(ap)) { 185b1c72916STejun Heo if (unlikely(ap->slave_link) && !dev_only) 186b1c72916STejun Heo return ap->slave_link; 187aadffb68STejun Heo return NULL; 188b1c72916STejun Heo } 189aadffb68STejun Heo return ap->pmp_link; 190aadffb68STejun Heo } 191aadffb68STejun Heo 192b1c72916STejun Heo /* slave_link excludes PMP */ 193b1c72916STejun Heo if (unlikely(link == ap->slave_link)) 194b1c72916STejun Heo return NULL; 195b1c72916STejun Heo 196aadffb68STejun Heo /* iterate to the next PMP link */ 197aadffb68STejun Heo if (++link < ap->pmp_link + ap->nr_pmp_links) 198aadffb68STejun Heo return link; 199aadffb68STejun Heo return NULL; 200aadffb68STejun Heo } 201aadffb68STejun Heo 202c6fd2807SJeff Garzik /** 203b1c72916STejun Heo * ata_dev_phys_link - find physical link for a device 204b1c72916STejun Heo * @dev: ATA device to look up physical link for 205b1c72916STejun Heo * 206b1c72916STejun Heo * Look up physical link which @dev is attached to. Note that 207b1c72916STejun Heo * this is different from @dev->link only when @dev is on slave 208b1c72916STejun Heo * link. For all other cases, it's the same as @dev->link. 209b1c72916STejun Heo * 210b1c72916STejun Heo * LOCKING: 211b1c72916STejun Heo * Don't care. 212b1c72916STejun Heo * 213b1c72916STejun Heo * RETURNS: 214b1c72916STejun Heo * Pointer to the found physical link. 215b1c72916STejun Heo */ 216b1c72916STejun Heo struct ata_link *ata_dev_phys_link(struct ata_device *dev) 217b1c72916STejun Heo { 218b1c72916STejun Heo struct ata_port *ap = dev->link->ap; 219b1c72916STejun Heo 220b1c72916STejun Heo if (!ap->slave_link) 221b1c72916STejun Heo return dev->link; 222b1c72916STejun Heo if (!dev->devno) 223b1c72916STejun Heo return &ap->link; 224b1c72916STejun Heo return ap->slave_link; 225b1c72916STejun Heo } 226b1c72916STejun Heo 227b1c72916STejun Heo /** 22833267325STejun Heo * ata_force_cbl - force cable type according to libata.force 2294cdfa1b3SRandy Dunlap * @ap: ATA port of interest 23033267325STejun Heo * 23133267325STejun Heo * Force cable type according to libata.force and whine about it. 23233267325STejun Heo * The last entry which has matching port number is used, so it 23333267325STejun Heo * can be specified as part of device force parameters. For 23433267325STejun Heo * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 23533267325STejun Heo * same effect. 23633267325STejun Heo * 23733267325STejun Heo * LOCKING: 23833267325STejun Heo * EH context. 23933267325STejun Heo */ 24033267325STejun Heo void ata_force_cbl(struct ata_port *ap) 24133267325STejun Heo { 24233267325STejun Heo int i; 24333267325STejun Heo 24433267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 24533267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 24633267325STejun Heo 24733267325STejun Heo if (fe->port != -1 && fe->port != ap->print_id) 24833267325STejun Heo continue; 24933267325STejun Heo 25033267325STejun Heo if (fe->param.cbl == ATA_CBL_NONE) 25133267325STejun Heo continue; 25233267325STejun Heo 25333267325STejun Heo ap->cbl = fe->param.cbl; 25433267325STejun Heo ata_port_printk(ap, KERN_NOTICE, 25533267325STejun Heo "FORCE: cable set to %s\n", fe->param.name); 25633267325STejun Heo return; 25733267325STejun Heo } 25833267325STejun Heo } 25933267325STejun Heo 26033267325STejun Heo /** 26105944bdfSTejun Heo * ata_force_link_limits - force link limits according to libata.force 26233267325STejun Heo * @link: ATA link of interest 26333267325STejun Heo * 26405944bdfSTejun Heo * Force link flags and SATA spd limit according to libata.force 26505944bdfSTejun Heo * and whine about it. When only the port part is specified 26605944bdfSTejun Heo * (e.g. 1:), the limit applies to all links connected to both 26705944bdfSTejun Heo * the host link and all fan-out ports connected via PMP. If the 26805944bdfSTejun Heo * device part is specified as 0 (e.g. 1.00:), it specifies the 26905944bdfSTejun Heo * first fan-out link not the host link. Device number 15 always 270b1c72916STejun Heo * points to the host link whether PMP is attached or not. If the 271b1c72916STejun Heo * controller has slave link, device number 16 points to it. 27233267325STejun Heo * 27333267325STejun Heo * LOCKING: 27433267325STejun Heo * EH context. 27533267325STejun Heo */ 27605944bdfSTejun Heo static void ata_force_link_limits(struct ata_link *link) 27733267325STejun Heo { 27805944bdfSTejun Heo bool did_spd = false; 279b1c72916STejun Heo int linkno = link->pmp; 280b1c72916STejun Heo int i; 28133267325STejun Heo 28233267325STejun Heo if (ata_is_host_link(link)) 283b1c72916STejun Heo linkno += 15; 28433267325STejun Heo 28533267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 28633267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 28733267325STejun Heo 28833267325STejun Heo if (fe->port != -1 && fe->port != link->ap->print_id) 28933267325STejun Heo continue; 29033267325STejun Heo 29133267325STejun Heo if (fe->device != -1 && fe->device != linkno) 29233267325STejun Heo continue; 29333267325STejun Heo 29405944bdfSTejun Heo /* only honor the first spd limit */ 29505944bdfSTejun Heo if (!did_spd && fe->param.spd_limit) { 29633267325STejun Heo link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 29733267325STejun Heo ata_link_printk(link, KERN_NOTICE, 29805944bdfSTejun Heo "FORCE: PHY spd limit set to %s\n", 29905944bdfSTejun Heo fe->param.name); 30005944bdfSTejun Heo did_spd = true; 30105944bdfSTejun Heo } 30205944bdfSTejun Heo 30305944bdfSTejun Heo /* let lflags stack */ 30405944bdfSTejun Heo if (fe->param.lflags) { 30505944bdfSTejun Heo link->flags |= fe->param.lflags; 30605944bdfSTejun Heo ata_link_printk(link, KERN_NOTICE, 30705944bdfSTejun Heo "FORCE: link flag 0x%x forced -> 0x%x\n", 30805944bdfSTejun Heo fe->param.lflags, link->flags); 30905944bdfSTejun Heo } 31033267325STejun Heo } 31133267325STejun Heo } 31233267325STejun Heo 31333267325STejun Heo /** 31433267325STejun Heo * ata_force_xfermask - force xfermask according to libata.force 31533267325STejun Heo * @dev: ATA device of interest 31633267325STejun Heo * 31733267325STejun Heo * Force xfer_mask according to libata.force and whine about it. 31833267325STejun Heo * For consistency with link selection, device number 15 selects 31933267325STejun Heo * the first device connected to the host link. 32033267325STejun Heo * 32133267325STejun Heo * LOCKING: 32233267325STejun Heo * EH context. 32333267325STejun Heo */ 32433267325STejun Heo static void ata_force_xfermask(struct ata_device *dev) 32533267325STejun Heo { 32633267325STejun Heo int devno = dev->link->pmp + dev->devno; 32733267325STejun Heo int alt_devno = devno; 32833267325STejun Heo int i; 32933267325STejun Heo 330b1c72916STejun Heo /* allow n.15/16 for devices attached to host port */ 331b1c72916STejun Heo if (ata_is_host_link(dev->link)) 332b1c72916STejun Heo alt_devno += 15; 33333267325STejun Heo 33433267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 33533267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 33633267325STejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 33733267325STejun Heo 33833267325STejun Heo if (fe->port != -1 && fe->port != dev->link->ap->print_id) 33933267325STejun Heo continue; 34033267325STejun Heo 34133267325STejun Heo if (fe->device != -1 && fe->device != devno && 34233267325STejun Heo fe->device != alt_devno) 34333267325STejun Heo continue; 34433267325STejun Heo 34533267325STejun Heo if (!fe->param.xfer_mask) 34633267325STejun Heo continue; 34733267325STejun Heo 34833267325STejun Heo ata_unpack_xfermask(fe->param.xfer_mask, 34933267325STejun Heo &pio_mask, &mwdma_mask, &udma_mask); 35033267325STejun Heo if (udma_mask) 35133267325STejun Heo dev->udma_mask = udma_mask; 35233267325STejun Heo else if (mwdma_mask) { 35333267325STejun Heo dev->udma_mask = 0; 35433267325STejun Heo dev->mwdma_mask = mwdma_mask; 35533267325STejun Heo } else { 35633267325STejun Heo dev->udma_mask = 0; 35733267325STejun Heo dev->mwdma_mask = 0; 35833267325STejun Heo dev->pio_mask = pio_mask; 35933267325STejun Heo } 36033267325STejun Heo 36133267325STejun Heo ata_dev_printk(dev, KERN_NOTICE, 36233267325STejun Heo "FORCE: xfer_mask set to %s\n", fe->param.name); 36333267325STejun Heo return; 36433267325STejun Heo } 36533267325STejun Heo } 36633267325STejun Heo 36733267325STejun Heo /** 36833267325STejun Heo * ata_force_horkage - force horkage according to libata.force 36933267325STejun Heo * @dev: ATA device of interest 37033267325STejun Heo * 37133267325STejun Heo * Force horkage according to libata.force and whine about it. 37233267325STejun Heo * For consistency with link selection, device number 15 selects 37333267325STejun Heo * the first device connected to the host link. 37433267325STejun Heo * 37533267325STejun Heo * LOCKING: 37633267325STejun Heo * EH context. 37733267325STejun Heo */ 37833267325STejun Heo static void ata_force_horkage(struct ata_device *dev) 37933267325STejun Heo { 38033267325STejun Heo int devno = dev->link->pmp + dev->devno; 38133267325STejun Heo int alt_devno = devno; 38233267325STejun Heo int i; 38333267325STejun Heo 384b1c72916STejun Heo /* allow n.15/16 for devices attached to host port */ 385b1c72916STejun Heo if (ata_is_host_link(dev->link)) 386b1c72916STejun Heo alt_devno += 15; 38733267325STejun Heo 38833267325STejun Heo for (i = 0; i < ata_force_tbl_size; i++) { 38933267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 39033267325STejun Heo 39133267325STejun Heo if (fe->port != -1 && fe->port != dev->link->ap->print_id) 39233267325STejun Heo continue; 39333267325STejun Heo 39433267325STejun Heo if (fe->device != -1 && fe->device != devno && 39533267325STejun Heo fe->device != alt_devno) 39633267325STejun Heo continue; 39733267325STejun Heo 39833267325STejun Heo if (!(~dev->horkage & fe->param.horkage_on) && 39933267325STejun Heo !(dev->horkage & fe->param.horkage_off)) 40033267325STejun Heo continue; 40133267325STejun Heo 40233267325STejun Heo dev->horkage |= fe->param.horkage_on; 40333267325STejun Heo dev->horkage &= ~fe->param.horkage_off; 40433267325STejun Heo 40533267325STejun Heo ata_dev_printk(dev, KERN_NOTICE, 40633267325STejun Heo "FORCE: horkage modified (%s)\n", fe->param.name); 40733267325STejun Heo } 40833267325STejun Heo } 40933267325STejun Heo 41033267325STejun Heo /** 411436d34b3STejun Heo * atapi_cmd_type - Determine ATAPI command type from SCSI opcode 412436d34b3STejun Heo * @opcode: SCSI opcode 413436d34b3STejun Heo * 414436d34b3STejun Heo * Determine ATAPI command type from @opcode. 415436d34b3STejun Heo * 416436d34b3STejun Heo * LOCKING: 417436d34b3STejun Heo * None. 418436d34b3STejun Heo * 419436d34b3STejun Heo * RETURNS: 420436d34b3STejun Heo * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} 421436d34b3STejun Heo */ 422436d34b3STejun Heo int atapi_cmd_type(u8 opcode) 423436d34b3STejun Heo { 424436d34b3STejun Heo switch (opcode) { 425436d34b3STejun Heo case GPCMD_READ_10: 426436d34b3STejun Heo case GPCMD_READ_12: 427436d34b3STejun Heo return ATAPI_READ; 428436d34b3STejun Heo 429436d34b3STejun Heo case GPCMD_WRITE_10: 430436d34b3STejun Heo case GPCMD_WRITE_12: 431436d34b3STejun Heo case GPCMD_WRITE_AND_VERIFY_10: 432436d34b3STejun Heo return ATAPI_WRITE; 433436d34b3STejun Heo 434436d34b3STejun Heo case GPCMD_READ_CD: 435436d34b3STejun Heo case GPCMD_READ_CD_MSF: 436436d34b3STejun Heo return ATAPI_READ_CD; 437436d34b3STejun Heo 438e52dcc48STejun Heo case ATA_16: 439e52dcc48STejun Heo case ATA_12: 440e52dcc48STejun Heo if (atapi_passthru16) 441e52dcc48STejun Heo return ATAPI_PASS_THRU; 442e52dcc48STejun Heo /* fall thru */ 443436d34b3STejun Heo default: 444436d34b3STejun Heo return ATAPI_MISC; 445436d34b3STejun Heo } 446436d34b3STejun Heo } 447436d34b3STejun Heo 448436d34b3STejun Heo /** 449c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 450c6fd2807SJeff Garzik * @tf: Taskfile to convert 451c6fd2807SJeff Garzik * @pmp: Port multiplier port 4529977126cSTejun Heo * @is_cmd: This FIS is for command 4539977126cSTejun Heo * @fis: Buffer into which data will output 454c6fd2807SJeff Garzik * 455c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 456c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 457c6fd2807SJeff Garzik * 458c6fd2807SJeff Garzik * LOCKING: 459c6fd2807SJeff Garzik * Inherited from caller. 460c6fd2807SJeff Garzik */ 4619977126cSTejun Heo void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) 462c6fd2807SJeff Garzik { 463c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 4649977126cSTejun Heo fis[1] = pmp & 0xf; /* Port multiplier number*/ 4659977126cSTejun Heo if (is_cmd) 4669977126cSTejun Heo fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ 4679977126cSTejun Heo 468c6fd2807SJeff Garzik fis[2] = tf->command; 469c6fd2807SJeff Garzik fis[3] = tf->feature; 470c6fd2807SJeff Garzik 471c6fd2807SJeff Garzik fis[4] = tf->lbal; 472c6fd2807SJeff Garzik fis[5] = tf->lbam; 473c6fd2807SJeff Garzik fis[6] = tf->lbah; 474c6fd2807SJeff Garzik fis[7] = tf->device; 475c6fd2807SJeff Garzik 476c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 477c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 478c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 479c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 480c6fd2807SJeff Garzik 481c6fd2807SJeff Garzik fis[12] = tf->nsect; 482c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 483c6fd2807SJeff Garzik fis[14] = 0; 484c6fd2807SJeff Garzik fis[15] = tf->ctl; 485c6fd2807SJeff Garzik 486c6fd2807SJeff Garzik fis[16] = 0; 487c6fd2807SJeff Garzik fis[17] = 0; 488c6fd2807SJeff Garzik fis[18] = 0; 489c6fd2807SJeff Garzik fis[19] = 0; 490c6fd2807SJeff Garzik } 491c6fd2807SJeff Garzik 492c6fd2807SJeff Garzik /** 493c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 494c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 495c6fd2807SJeff Garzik * @tf: Taskfile to output 496c6fd2807SJeff Garzik * 497c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 498c6fd2807SJeff Garzik * 499c6fd2807SJeff Garzik * LOCKING: 500c6fd2807SJeff Garzik * Inherited from caller. 501c6fd2807SJeff Garzik */ 502c6fd2807SJeff Garzik 503c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 504c6fd2807SJeff Garzik { 505c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 506c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 507c6fd2807SJeff Garzik 508c6fd2807SJeff Garzik tf->lbal = fis[4]; 509c6fd2807SJeff Garzik tf->lbam = fis[5]; 510c6fd2807SJeff Garzik tf->lbah = fis[6]; 511c6fd2807SJeff Garzik tf->device = fis[7]; 512c6fd2807SJeff Garzik 513c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 514c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 515c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 516c6fd2807SJeff Garzik 517c6fd2807SJeff Garzik tf->nsect = fis[12]; 518c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 519c6fd2807SJeff Garzik } 520c6fd2807SJeff Garzik 521c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 522c6fd2807SJeff Garzik /* pio multi */ 523c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 524c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 525c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 526c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 527c6fd2807SJeff Garzik 0, 528c6fd2807SJeff Garzik 0, 529c6fd2807SJeff Garzik 0, 530c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 531c6fd2807SJeff Garzik /* pio */ 532c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 533c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 534c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 535c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 536c6fd2807SJeff Garzik 0, 537c6fd2807SJeff Garzik 0, 538c6fd2807SJeff Garzik 0, 539c6fd2807SJeff Garzik 0, 540c6fd2807SJeff Garzik /* dma */ 541c6fd2807SJeff Garzik ATA_CMD_READ, 542c6fd2807SJeff Garzik ATA_CMD_WRITE, 543c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 544c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 545c6fd2807SJeff Garzik 0, 546c6fd2807SJeff Garzik 0, 547c6fd2807SJeff Garzik 0, 548c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 549c6fd2807SJeff Garzik }; 550c6fd2807SJeff Garzik 551c6fd2807SJeff Garzik /** 552c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 553bd056d7eSTejun Heo * @tf: command to examine and configure 554bd056d7eSTejun Heo * @dev: device tf belongs to 555c6fd2807SJeff Garzik * 556c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 557c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 558c6fd2807SJeff Garzik * 559c6fd2807SJeff Garzik * LOCKING: 560c6fd2807SJeff Garzik * caller. 561c6fd2807SJeff Garzik */ 562bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 563c6fd2807SJeff Garzik { 564c6fd2807SJeff Garzik u8 cmd; 565c6fd2807SJeff Garzik 566c6fd2807SJeff Garzik int index, fua, lba48, write; 567c6fd2807SJeff Garzik 568c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 569c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 570c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 571c6fd2807SJeff Garzik 572c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 573c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 574c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 5759af5c9c9STejun Heo } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 576c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 577c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 578c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 579c6fd2807SJeff Garzik } else { 580c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 581c6fd2807SJeff Garzik index = 16; 582c6fd2807SJeff Garzik } 583c6fd2807SJeff Garzik 584c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 585c6fd2807SJeff Garzik if (cmd) { 586c6fd2807SJeff Garzik tf->command = cmd; 587c6fd2807SJeff Garzik return 0; 588c6fd2807SJeff Garzik } 589c6fd2807SJeff Garzik return -1; 590c6fd2807SJeff Garzik } 591c6fd2807SJeff Garzik 592c6fd2807SJeff Garzik /** 59335b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 59435b649feSTejun Heo * @tf: ATA taskfile of interest 59535b649feSTejun Heo * @dev: ATA device @tf belongs to 59635b649feSTejun Heo * 59735b649feSTejun Heo * LOCKING: 59835b649feSTejun Heo * None. 59935b649feSTejun Heo * 60035b649feSTejun Heo * Read block address from @tf. This function can handle all 60135b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 60235b649feSTejun Heo * flags select the address format to use. 60335b649feSTejun Heo * 60435b649feSTejun Heo * RETURNS: 60535b649feSTejun Heo * Block address read from @tf. 60635b649feSTejun Heo */ 60735b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 60835b649feSTejun Heo { 60935b649feSTejun Heo u64 block = 0; 61035b649feSTejun Heo 61135b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 61235b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 61335b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 61435b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 61535b649feSTejun Heo block |= tf->hob_lbal << 24; 61635b649feSTejun Heo } else 61735b649feSTejun Heo block |= (tf->device & 0xf) << 24; 61835b649feSTejun Heo 61935b649feSTejun Heo block |= tf->lbah << 16; 62035b649feSTejun Heo block |= tf->lbam << 8; 62135b649feSTejun Heo block |= tf->lbal; 62235b649feSTejun Heo } else { 62335b649feSTejun Heo u32 cyl, head, sect; 62435b649feSTejun Heo 62535b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 62635b649feSTejun Heo head = tf->device & 0xf; 62735b649feSTejun Heo sect = tf->lbal; 62835b649feSTejun Heo 62935b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 63035b649feSTejun Heo } 63135b649feSTejun Heo 63235b649feSTejun Heo return block; 63335b649feSTejun Heo } 63435b649feSTejun Heo 63535b649feSTejun Heo /** 636bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 637bd056d7eSTejun Heo * @tf: Target ATA taskfile 638bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 639bd056d7eSTejun Heo * @block: Block address 640bd056d7eSTejun Heo * @n_block: Number of blocks 641bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 642bd056d7eSTejun Heo * @tag: tag 643bd056d7eSTejun Heo * 644bd056d7eSTejun Heo * LOCKING: 645bd056d7eSTejun Heo * None. 646bd056d7eSTejun Heo * 647bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 648bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 649bd056d7eSTejun Heo * 650bd056d7eSTejun Heo * RETURNS: 651bd056d7eSTejun Heo * 652bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 653bd056d7eSTejun Heo * -EINVAL if the request is invalid. 654bd056d7eSTejun Heo */ 655bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 656bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 657bd056d7eSTejun Heo unsigned int tag) 658bd056d7eSTejun Heo { 659bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 660bd056d7eSTejun Heo tf->flags |= tf_flags; 661bd056d7eSTejun Heo 6626d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 663bd056d7eSTejun Heo /* yay, NCQ */ 664bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 665bd056d7eSTejun Heo return -ERANGE; 666bd056d7eSTejun Heo 667bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 668bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 669bd056d7eSTejun Heo 670bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 671bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 672bd056d7eSTejun Heo else 673bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 674bd056d7eSTejun Heo 675bd056d7eSTejun Heo tf->nsect = tag << 3; 676bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 677bd056d7eSTejun Heo tf->feature = n_block & 0xff; 678bd056d7eSTejun Heo 679bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 680bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 681bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 682bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 683bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 684bd056d7eSTejun Heo tf->lbal = block & 0xff; 685bd056d7eSTejun Heo 686bd056d7eSTejun Heo tf->device = 1 << 6; 687bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 688bd056d7eSTejun Heo tf->device |= 1 << 7; 689bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 690bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 691bd056d7eSTejun Heo 692bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 693bd056d7eSTejun Heo /* use LBA28 */ 694bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 695bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 696bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 697bd056d7eSTejun Heo return -ERANGE; 698bd056d7eSTejun Heo 699bd056d7eSTejun Heo /* use LBA48 */ 700bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 701bd056d7eSTejun Heo 702bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 703bd056d7eSTejun Heo 704bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 705bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 706bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 707bd056d7eSTejun Heo } else 708bd056d7eSTejun Heo /* request too large even for LBA48 */ 709bd056d7eSTejun Heo return -ERANGE; 710bd056d7eSTejun Heo 711bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 712bd056d7eSTejun Heo return -EINVAL; 713bd056d7eSTejun Heo 714bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 715bd056d7eSTejun Heo 716bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 717bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 718bd056d7eSTejun Heo tf->lbal = block & 0xff; 719bd056d7eSTejun Heo 720bd056d7eSTejun Heo tf->device |= ATA_LBA; 721bd056d7eSTejun Heo } else { 722bd056d7eSTejun Heo /* CHS */ 723bd056d7eSTejun Heo u32 sect, head, cyl, track; 724bd056d7eSTejun Heo 725bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 726bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 727bd056d7eSTejun Heo return -ERANGE; 728bd056d7eSTejun Heo 729bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 730bd056d7eSTejun Heo return -EINVAL; 731bd056d7eSTejun Heo 732bd056d7eSTejun Heo /* Convert LBA to CHS */ 733bd056d7eSTejun Heo track = (u32)block / dev->sectors; 734bd056d7eSTejun Heo cyl = track / dev->heads; 735bd056d7eSTejun Heo head = track % dev->heads; 736bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 737bd056d7eSTejun Heo 738bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 739bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 740bd056d7eSTejun Heo 741bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 742bd056d7eSTejun Heo Cylinder: 0-65535 743bd056d7eSTejun Heo Head: 0-15 744bd056d7eSTejun Heo Sector: 1-255*/ 745bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 746bd056d7eSTejun Heo return -ERANGE; 747bd056d7eSTejun Heo 748bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 749bd056d7eSTejun Heo tf->lbal = sect; 750bd056d7eSTejun Heo tf->lbam = cyl; 751bd056d7eSTejun Heo tf->lbah = cyl >> 8; 752bd056d7eSTejun Heo tf->device |= head; 753bd056d7eSTejun Heo } 754bd056d7eSTejun Heo 755bd056d7eSTejun Heo return 0; 756bd056d7eSTejun Heo } 757bd056d7eSTejun Heo 758bd056d7eSTejun Heo /** 759c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 760c6fd2807SJeff Garzik * @pio_mask: pio_mask 761c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 762c6fd2807SJeff Garzik * @udma_mask: udma_mask 763c6fd2807SJeff Garzik * 764c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 765c6fd2807SJeff Garzik * unsigned int xfer_mask. 766c6fd2807SJeff Garzik * 767c6fd2807SJeff Garzik * LOCKING: 768c6fd2807SJeff Garzik * None. 769c6fd2807SJeff Garzik * 770c6fd2807SJeff Garzik * RETURNS: 771c6fd2807SJeff Garzik * Packed xfer_mask. 772c6fd2807SJeff Garzik */ 7737dc951aeSTejun Heo unsigned long ata_pack_xfermask(unsigned long pio_mask, 7747dc951aeSTejun Heo unsigned long mwdma_mask, 7757dc951aeSTejun Heo unsigned long udma_mask) 776c6fd2807SJeff Garzik { 777c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 778c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 779c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 780c6fd2807SJeff Garzik } 781c6fd2807SJeff Garzik 782c6fd2807SJeff Garzik /** 783c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 784c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 785c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 786c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 787c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 788c6fd2807SJeff Garzik * 789c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 790c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 791c6fd2807SJeff Garzik */ 7927dc951aeSTejun Heo void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, 7937dc951aeSTejun Heo unsigned long *mwdma_mask, unsigned long *udma_mask) 794c6fd2807SJeff Garzik { 795c6fd2807SJeff Garzik if (pio_mask) 796c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 797c6fd2807SJeff Garzik if (mwdma_mask) 798c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 799c6fd2807SJeff Garzik if (udma_mask) 800c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 801c6fd2807SJeff Garzik } 802c6fd2807SJeff Garzik 803c6fd2807SJeff Garzik static const struct ata_xfer_ent { 804c6fd2807SJeff Garzik int shift, bits; 805c6fd2807SJeff Garzik u8 base; 806c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 80770cd071eSTejun Heo { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 80870cd071eSTejun Heo { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 80970cd071eSTejun Heo { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 810c6fd2807SJeff Garzik { -1, }, 811c6fd2807SJeff Garzik }; 812c6fd2807SJeff Garzik 813c6fd2807SJeff Garzik /** 814c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 815c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 816c6fd2807SJeff Garzik * 817c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 818c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 819c6fd2807SJeff Garzik * 820c6fd2807SJeff Garzik * LOCKING: 821c6fd2807SJeff Garzik * None. 822c6fd2807SJeff Garzik * 823c6fd2807SJeff Garzik * RETURNS: 82470cd071eSTejun Heo * Matching XFER_* value, 0xff if no match found. 825c6fd2807SJeff Garzik */ 8267dc951aeSTejun Heo u8 ata_xfer_mask2mode(unsigned long xfer_mask) 827c6fd2807SJeff Garzik { 828c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 829c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 830c6fd2807SJeff Garzik 831c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 832c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 833c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 83470cd071eSTejun Heo return 0xff; 835c6fd2807SJeff Garzik } 836c6fd2807SJeff Garzik 837c6fd2807SJeff Garzik /** 838c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 839c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 840c6fd2807SJeff Garzik * 841c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 842c6fd2807SJeff Garzik * 843c6fd2807SJeff Garzik * LOCKING: 844c6fd2807SJeff Garzik * None. 845c6fd2807SJeff Garzik * 846c6fd2807SJeff Garzik * RETURNS: 847c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 848c6fd2807SJeff Garzik */ 8497dc951aeSTejun Heo unsigned long ata_xfer_mode2mask(u8 xfer_mode) 850c6fd2807SJeff Garzik { 851c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 852c6fd2807SJeff Garzik 853c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 854c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 85570cd071eSTejun Heo return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 85670cd071eSTejun Heo & ~((1 << ent->shift) - 1); 857c6fd2807SJeff Garzik return 0; 858c6fd2807SJeff Garzik } 859c6fd2807SJeff Garzik 860c6fd2807SJeff Garzik /** 861c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 862c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 863c6fd2807SJeff Garzik * 864c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 865c6fd2807SJeff Garzik * 866c6fd2807SJeff Garzik * LOCKING: 867c6fd2807SJeff Garzik * None. 868c6fd2807SJeff Garzik * 869c6fd2807SJeff Garzik * RETURNS: 870c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 871c6fd2807SJeff Garzik */ 8727dc951aeSTejun Heo int ata_xfer_mode2shift(unsigned long xfer_mode) 873c6fd2807SJeff Garzik { 874c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 875c6fd2807SJeff Garzik 876c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 877c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 878c6fd2807SJeff Garzik return ent->shift; 879c6fd2807SJeff Garzik return -1; 880c6fd2807SJeff Garzik } 881c6fd2807SJeff Garzik 882c6fd2807SJeff Garzik /** 883c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 884c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 885c6fd2807SJeff Garzik * 886c6fd2807SJeff Garzik * Determine string which represents the highest speed 887c6fd2807SJeff Garzik * (highest bit in @modemask). 888c6fd2807SJeff Garzik * 889c6fd2807SJeff Garzik * LOCKING: 890c6fd2807SJeff Garzik * None. 891c6fd2807SJeff Garzik * 892c6fd2807SJeff Garzik * RETURNS: 893c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 894c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 895c6fd2807SJeff Garzik */ 8967dc951aeSTejun Heo const char *ata_mode_string(unsigned long xfer_mask) 897c6fd2807SJeff Garzik { 898c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 899c6fd2807SJeff Garzik "PIO0", 900c6fd2807SJeff Garzik "PIO1", 901c6fd2807SJeff Garzik "PIO2", 902c6fd2807SJeff Garzik "PIO3", 903c6fd2807SJeff Garzik "PIO4", 904b352e57dSAlan Cox "PIO5", 905b352e57dSAlan Cox "PIO6", 906c6fd2807SJeff Garzik "MWDMA0", 907c6fd2807SJeff Garzik "MWDMA1", 908c6fd2807SJeff Garzik "MWDMA2", 909b352e57dSAlan Cox "MWDMA3", 910b352e57dSAlan Cox "MWDMA4", 911c6fd2807SJeff Garzik "UDMA/16", 912c6fd2807SJeff Garzik "UDMA/25", 913c6fd2807SJeff Garzik "UDMA/33", 914c6fd2807SJeff Garzik "UDMA/44", 915c6fd2807SJeff Garzik "UDMA/66", 916c6fd2807SJeff Garzik "UDMA/100", 917c6fd2807SJeff Garzik "UDMA/133", 918c6fd2807SJeff Garzik "UDMA7", 919c6fd2807SJeff Garzik }; 920c6fd2807SJeff Garzik int highbit; 921c6fd2807SJeff Garzik 922c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 923c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 924c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 925c6fd2807SJeff Garzik return "<n/a>"; 926c6fd2807SJeff Garzik } 927c6fd2807SJeff Garzik 928c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 929c6fd2807SJeff Garzik { 930c6fd2807SJeff Garzik static const char * const spd_str[] = { 931c6fd2807SJeff Garzik "1.5 Gbps", 932c6fd2807SJeff Garzik "3.0 Gbps", 933c6fd2807SJeff Garzik }; 934c6fd2807SJeff Garzik 935c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 936c6fd2807SJeff Garzik return "<unknown>"; 937c6fd2807SJeff Garzik return spd_str[spd - 1]; 938c6fd2807SJeff Garzik } 939c6fd2807SJeff Garzik 940c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 941c6fd2807SJeff Garzik { 94209d7f9b0STejun Heo if (ata_dev_enabled(dev)) { 9439af5c9c9STejun Heo if (ata_msg_drv(dev->link->ap)) 944c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 945562f0c2dSTejun Heo ata_acpi_on_disable(dev); 9464ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 9474ae72a1eSTejun Heo ATA_DNXFER_QUIET); 948c6fd2807SJeff Garzik dev->class++; 949c6fd2807SJeff Garzik } 950c6fd2807SJeff Garzik } 951c6fd2807SJeff Garzik 952ca77329fSKristen Carlson Accardi static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) 953ca77329fSKristen Carlson Accardi { 954ca77329fSKristen Carlson Accardi struct ata_link *link = dev->link; 955ca77329fSKristen Carlson Accardi struct ata_port *ap = link->ap; 956ca77329fSKristen Carlson Accardi u32 scontrol; 957ca77329fSKristen Carlson Accardi unsigned int err_mask; 958ca77329fSKristen Carlson Accardi int rc; 959ca77329fSKristen Carlson Accardi 960ca77329fSKristen Carlson Accardi /* 961ca77329fSKristen Carlson Accardi * disallow DIPM for drivers which haven't set 962ca77329fSKristen Carlson Accardi * ATA_FLAG_IPM. This is because when DIPM is enabled, 963ca77329fSKristen Carlson Accardi * phy ready will be set in the interrupt status on 964ca77329fSKristen Carlson Accardi * state changes, which will cause some drivers to 965ca77329fSKristen Carlson Accardi * think there are errors - additionally drivers will 966ca77329fSKristen Carlson Accardi * need to disable hot plug. 967ca77329fSKristen Carlson Accardi */ 968ca77329fSKristen Carlson Accardi if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { 969ca77329fSKristen Carlson Accardi ap->pm_policy = NOT_AVAILABLE; 970ca77329fSKristen Carlson Accardi return -EINVAL; 971ca77329fSKristen Carlson Accardi } 972ca77329fSKristen Carlson Accardi 973ca77329fSKristen Carlson Accardi /* 974ca77329fSKristen Carlson Accardi * For DIPM, we will only enable it for the 975ca77329fSKristen Carlson Accardi * min_power setting. 976ca77329fSKristen Carlson Accardi * 977ca77329fSKristen Carlson Accardi * Why? Because Disks are too stupid to know that 978ca77329fSKristen Carlson Accardi * If the host rejects a request to go to SLUMBER 979ca77329fSKristen Carlson Accardi * they should retry at PARTIAL, and instead it 980ca77329fSKristen Carlson Accardi * just would give up. So, for medium_power to 981ca77329fSKristen Carlson Accardi * work at all, we need to only allow HIPM. 982ca77329fSKristen Carlson Accardi */ 983ca77329fSKristen Carlson Accardi rc = sata_scr_read(link, SCR_CONTROL, &scontrol); 984ca77329fSKristen Carlson Accardi if (rc) 985ca77329fSKristen Carlson Accardi return rc; 986ca77329fSKristen Carlson Accardi 987ca77329fSKristen Carlson Accardi switch (policy) { 988ca77329fSKristen Carlson Accardi case MIN_POWER: 989ca77329fSKristen Carlson Accardi /* no restrictions on IPM transitions */ 990ca77329fSKristen Carlson Accardi scontrol &= ~(0x3 << 8); 991ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 992ca77329fSKristen Carlson Accardi if (rc) 993ca77329fSKristen Carlson Accardi return rc; 994ca77329fSKristen Carlson Accardi 995ca77329fSKristen Carlson Accardi /* enable DIPM */ 996ca77329fSKristen Carlson Accardi if (dev->flags & ATA_DFLAG_DIPM) 997ca77329fSKristen Carlson Accardi err_mask = ata_dev_set_feature(dev, 998ca77329fSKristen Carlson Accardi SETFEATURES_SATA_ENABLE, SATA_DIPM); 999ca77329fSKristen Carlson Accardi break; 1000ca77329fSKristen Carlson Accardi case MEDIUM_POWER: 1001ca77329fSKristen Carlson Accardi /* allow IPM to PARTIAL */ 1002ca77329fSKristen Carlson Accardi scontrol &= ~(0x1 << 8); 1003ca77329fSKristen Carlson Accardi scontrol |= (0x2 << 8); 1004ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 1005ca77329fSKristen Carlson Accardi if (rc) 1006ca77329fSKristen Carlson Accardi return rc; 1007ca77329fSKristen Carlson Accardi 1008f5456b63SKristen Carlson Accardi /* 1009f5456b63SKristen Carlson Accardi * we don't have to disable DIPM since IPM flags 1010f5456b63SKristen Carlson Accardi * disallow transitions to SLUMBER, which effectively 1011f5456b63SKristen Carlson Accardi * disable DIPM if it does not support PARTIAL 1012f5456b63SKristen Carlson Accardi */ 1013ca77329fSKristen Carlson Accardi break; 1014ca77329fSKristen Carlson Accardi case NOT_AVAILABLE: 1015ca77329fSKristen Carlson Accardi case MAX_PERFORMANCE: 1016ca77329fSKristen Carlson Accardi /* disable all IPM transitions */ 1017ca77329fSKristen Carlson Accardi scontrol |= (0x3 << 8); 1018ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 1019ca77329fSKristen Carlson Accardi if (rc) 1020ca77329fSKristen Carlson Accardi return rc; 1021ca77329fSKristen Carlson Accardi 1022f5456b63SKristen Carlson Accardi /* 1023f5456b63SKristen Carlson Accardi * we don't have to disable DIPM since IPM flags 1024f5456b63SKristen Carlson Accardi * disallow all transitions which effectively 1025f5456b63SKristen Carlson Accardi * disable DIPM anyway. 1026f5456b63SKristen Carlson Accardi */ 1027ca77329fSKristen Carlson Accardi break; 1028ca77329fSKristen Carlson Accardi } 1029ca77329fSKristen Carlson Accardi 1030ca77329fSKristen Carlson Accardi /* FIXME: handle SET FEATURES failure */ 1031ca77329fSKristen Carlson Accardi (void) err_mask; 1032ca77329fSKristen Carlson Accardi 1033ca77329fSKristen Carlson Accardi return 0; 1034ca77329fSKristen Carlson Accardi } 1035ca77329fSKristen Carlson Accardi 1036ca77329fSKristen Carlson Accardi /** 1037ca77329fSKristen Carlson Accardi * ata_dev_enable_pm - enable SATA interface power management 103848166fd9SStephen Hemminger * @dev: device to enable power management 103948166fd9SStephen Hemminger * @policy: the link power management policy 1040ca77329fSKristen Carlson Accardi * 1041ca77329fSKristen Carlson Accardi * Enable SATA Interface power management. This will enable 1042ca77329fSKristen Carlson Accardi * Device Interface Power Management (DIPM) for min_power 1043ca77329fSKristen Carlson Accardi * policy, and then call driver specific callbacks for 1044ca77329fSKristen Carlson Accardi * enabling Host Initiated Power management. 1045ca77329fSKristen Carlson Accardi * 1046ca77329fSKristen Carlson Accardi * Locking: Caller. 1047ca77329fSKristen Carlson Accardi * Returns: -EINVAL if IPM is not supported, 0 otherwise. 1048ca77329fSKristen Carlson Accardi */ 1049ca77329fSKristen Carlson Accardi void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) 1050ca77329fSKristen Carlson Accardi { 1051ca77329fSKristen Carlson Accardi int rc = 0; 1052ca77329fSKristen Carlson Accardi struct ata_port *ap = dev->link->ap; 1053ca77329fSKristen Carlson Accardi 1054ca77329fSKristen Carlson Accardi /* set HIPM first, then DIPM */ 1055ca77329fSKristen Carlson Accardi if (ap->ops->enable_pm) 1056ca77329fSKristen Carlson Accardi rc = ap->ops->enable_pm(ap, policy); 1057ca77329fSKristen Carlson Accardi if (rc) 1058ca77329fSKristen Carlson Accardi goto enable_pm_out; 1059ca77329fSKristen Carlson Accardi rc = ata_dev_set_dipm(dev, policy); 1060ca77329fSKristen Carlson Accardi 1061ca77329fSKristen Carlson Accardi enable_pm_out: 1062ca77329fSKristen Carlson Accardi if (rc) 1063ca77329fSKristen Carlson Accardi ap->pm_policy = MAX_PERFORMANCE; 1064ca77329fSKristen Carlson Accardi else 1065ca77329fSKristen Carlson Accardi ap->pm_policy = policy; 1066ca77329fSKristen Carlson Accardi return /* rc */; /* hopefully we can use 'rc' eventually */ 1067ca77329fSKristen Carlson Accardi } 1068ca77329fSKristen Carlson Accardi 10691992a5edSStephen Rothwell #ifdef CONFIG_PM 1070ca77329fSKristen Carlson Accardi /** 1071ca77329fSKristen Carlson Accardi * ata_dev_disable_pm - disable SATA interface power management 107248166fd9SStephen Hemminger * @dev: device to disable power management 1073ca77329fSKristen Carlson Accardi * 1074ca77329fSKristen Carlson Accardi * Disable SATA Interface power management. This will disable 1075ca77329fSKristen Carlson Accardi * Device Interface Power Management (DIPM) without changing 1076ca77329fSKristen Carlson Accardi * policy, call driver specific callbacks for disabling Host 1077ca77329fSKristen Carlson Accardi * Initiated Power management. 1078ca77329fSKristen Carlson Accardi * 1079ca77329fSKristen Carlson Accardi * Locking: Caller. 1080ca77329fSKristen Carlson Accardi * Returns: void 1081ca77329fSKristen Carlson Accardi */ 1082ca77329fSKristen Carlson Accardi static void ata_dev_disable_pm(struct ata_device *dev) 1083ca77329fSKristen Carlson Accardi { 1084ca77329fSKristen Carlson Accardi struct ata_port *ap = dev->link->ap; 1085ca77329fSKristen Carlson Accardi 1086ca77329fSKristen Carlson Accardi ata_dev_set_dipm(dev, MAX_PERFORMANCE); 1087ca77329fSKristen Carlson Accardi if (ap->ops->disable_pm) 1088ca77329fSKristen Carlson Accardi ap->ops->disable_pm(ap); 1089ca77329fSKristen Carlson Accardi } 10901992a5edSStephen Rothwell #endif /* CONFIG_PM */ 1091ca77329fSKristen Carlson Accardi 1092ca77329fSKristen Carlson Accardi void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) 1093ca77329fSKristen Carlson Accardi { 1094ca77329fSKristen Carlson Accardi ap->pm_policy = policy; 10953ec25ebdSTejun Heo ap->link.eh_info.action |= ATA_EH_LPM; 1096ca77329fSKristen Carlson Accardi ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; 1097ca77329fSKristen Carlson Accardi ata_port_schedule_eh(ap); 1098ca77329fSKristen Carlson Accardi } 1099ca77329fSKristen Carlson Accardi 11001992a5edSStephen Rothwell #ifdef CONFIG_PM 1101ca77329fSKristen Carlson Accardi static void ata_lpm_enable(struct ata_host *host) 1102ca77329fSKristen Carlson Accardi { 1103ca77329fSKristen Carlson Accardi struct ata_link *link; 1104ca77329fSKristen Carlson Accardi struct ata_port *ap; 1105ca77329fSKristen Carlson Accardi struct ata_device *dev; 1106ca77329fSKristen Carlson Accardi int i; 1107ca77329fSKristen Carlson Accardi 1108ca77329fSKristen Carlson Accardi for (i = 0; i < host->n_ports; i++) { 1109ca77329fSKristen Carlson Accardi ap = host->ports[i]; 1110ca77329fSKristen Carlson Accardi ata_port_for_each_link(link, ap) { 1111ca77329fSKristen Carlson Accardi ata_link_for_each_dev(dev, link) 1112ca77329fSKristen Carlson Accardi ata_dev_disable_pm(dev); 1113ca77329fSKristen Carlson Accardi } 1114ca77329fSKristen Carlson Accardi } 1115ca77329fSKristen Carlson Accardi } 1116ca77329fSKristen Carlson Accardi 1117ca77329fSKristen Carlson Accardi static void ata_lpm_disable(struct ata_host *host) 1118ca77329fSKristen Carlson Accardi { 1119ca77329fSKristen Carlson Accardi int i; 1120ca77329fSKristen Carlson Accardi 1121ca77329fSKristen Carlson Accardi for (i = 0; i < host->n_ports; i++) { 1122ca77329fSKristen Carlson Accardi struct ata_port *ap = host->ports[i]; 1123ca77329fSKristen Carlson Accardi ata_lpm_schedule(ap, ap->pm_policy); 1124ca77329fSKristen Carlson Accardi } 1125ca77329fSKristen Carlson Accardi } 11261992a5edSStephen Rothwell #endif /* CONFIG_PM */ 1127ca77329fSKristen Carlson Accardi 1128c6fd2807SJeff Garzik /** 1129c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 1130c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 1131c6fd2807SJeff Garzik * 1132c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 1133c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 1134c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 1135c6fd2807SJeff Garzik * 1136c6fd2807SJeff Garzik * LOCKING: 1137c6fd2807SJeff Garzik * None. 1138c6fd2807SJeff Garzik * 1139c6fd2807SJeff Garzik * RETURNS: 1140633273a3STejun Heo * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or 1141633273a3STejun Heo * %ATA_DEV_UNKNOWN the event of failure. 1142c6fd2807SJeff Garzik */ 1143c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1144c6fd2807SJeff Garzik { 1145c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 1146c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 1147c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 1148633273a3STejun Heo * 1149633273a3STejun Heo * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1150633273a3STejun Heo * signatures for ATA and ATAPI devices attached on SerialATA, 1151633273a3STejun Heo * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1152633273a3STejun Heo * spec has never mentioned about using different signatures 1153633273a3STejun Heo * for ATA/ATAPI devices. Then, Serial ATA II: Port 1154633273a3STejun Heo * Multiplier specification began to use 0x69/0x96 to identify 1155633273a3STejun Heo * port multpliers and 0x3c/0xc3 to identify SEMB device. 1156633273a3STejun Heo * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1157633273a3STejun Heo * 0x69/0x96 shortly and described them as reserved for 1158633273a3STejun Heo * SerialATA. 1159633273a3STejun Heo * 1160633273a3STejun Heo * We follow the current spec and consider that 0x69/0x96 1161633273a3STejun Heo * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 1162c6fd2807SJeff Garzik */ 1163633273a3STejun Heo if ((tf->lbam == 0) && (tf->lbah == 0)) { 1164c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 1165c6fd2807SJeff Garzik return ATA_DEV_ATA; 1166c6fd2807SJeff Garzik } 1167c6fd2807SJeff Garzik 1168633273a3STejun Heo if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { 1169c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 1170c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 1171c6fd2807SJeff Garzik } 1172c6fd2807SJeff Garzik 1173633273a3STejun Heo if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { 1174633273a3STejun Heo DPRINTK("found PMP device by sig\n"); 1175633273a3STejun Heo return ATA_DEV_PMP; 1176633273a3STejun Heo } 1177633273a3STejun Heo 1178633273a3STejun Heo if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { 11792dcb407eSJeff Garzik printk(KERN_INFO "ata: SEMB device ignored\n"); 1180633273a3STejun Heo return ATA_DEV_SEMB_UNSUP; /* not yet */ 1181633273a3STejun Heo } 1182633273a3STejun Heo 1183c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 1184c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 1185c6fd2807SJeff Garzik } 1186c6fd2807SJeff Garzik 1187c6fd2807SJeff Garzik /** 1188c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 1189c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 1190c6fd2807SJeff Garzik * @s: string into which data is output 1191c6fd2807SJeff Garzik * @ofs: offset into identify device page 1192c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 1193c6fd2807SJeff Garzik * 1194c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 1195c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 1196c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 1197c6fd2807SJeff Garzik * 1198c6fd2807SJeff Garzik * LOCKING: 1199c6fd2807SJeff Garzik * caller. 1200c6fd2807SJeff Garzik */ 1201c6fd2807SJeff Garzik 1202c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 1203c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 1204c6fd2807SJeff Garzik { 1205c6fd2807SJeff Garzik unsigned int c; 1206c6fd2807SJeff Garzik 1207963e4975SAlan Cox BUG_ON(len & 1); 1208963e4975SAlan Cox 1209c6fd2807SJeff Garzik while (len > 0) { 1210c6fd2807SJeff Garzik c = id[ofs] >> 8; 1211c6fd2807SJeff Garzik *s = c; 1212c6fd2807SJeff Garzik s++; 1213c6fd2807SJeff Garzik 1214c6fd2807SJeff Garzik c = id[ofs] & 0xff; 1215c6fd2807SJeff Garzik *s = c; 1216c6fd2807SJeff Garzik s++; 1217c6fd2807SJeff Garzik 1218c6fd2807SJeff Garzik ofs++; 1219c6fd2807SJeff Garzik len -= 2; 1220c6fd2807SJeff Garzik } 1221c6fd2807SJeff Garzik } 1222c6fd2807SJeff Garzik 1223c6fd2807SJeff Garzik /** 1224c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1225c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 1226c6fd2807SJeff Garzik * @s: string into which data is output 1227c6fd2807SJeff Garzik * @ofs: offset into identify device page 1228c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 1229c6fd2807SJeff Garzik * 1230c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 1231c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 1232c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 1233c6fd2807SJeff Garzik * 1234c6fd2807SJeff Garzik * LOCKING: 1235c6fd2807SJeff Garzik * caller. 1236c6fd2807SJeff Garzik */ 1237c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 1238c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 1239c6fd2807SJeff Garzik { 1240c6fd2807SJeff Garzik unsigned char *p; 1241c6fd2807SJeff Garzik 1242c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 1243c6fd2807SJeff Garzik 1244c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 1245c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 1246c6fd2807SJeff Garzik p--; 1247c6fd2807SJeff Garzik *p = '\0'; 1248c6fd2807SJeff Garzik } 1249c6fd2807SJeff Garzik 1250db6f8759STejun Heo static u64 ata_id_n_sectors(const u16 *id) 1251db6f8759STejun Heo { 1252db6f8759STejun Heo if (ata_id_has_lba(id)) { 1253db6f8759STejun Heo if (ata_id_has_lba48(id)) 1254db6f8759STejun Heo return ata_id_u64(id, 100); 1255db6f8759STejun Heo else 1256db6f8759STejun Heo return ata_id_u32(id, 60); 1257db6f8759STejun Heo } else { 1258db6f8759STejun Heo if (ata_id_current_chs_valid(id)) 1259db6f8759STejun Heo return ata_id_u32(id, 57); 1260db6f8759STejun Heo else 1261db6f8759STejun Heo return id[1] * id[3] * id[6]; 1262db6f8759STejun Heo } 1263db6f8759STejun Heo } 1264db6f8759STejun Heo 1265a5987e0aSTejun Heo u64 ata_tf_to_lba48(const struct ata_taskfile *tf) 12661e999736SAlan Cox { 12671e999736SAlan Cox u64 sectors = 0; 12681e999736SAlan Cox 12691e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 12701e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 12711e999736SAlan Cox sectors |= (tf->hob_lbal & 0xff) << 24; 12721e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 12731e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 12741e999736SAlan Cox sectors |= (tf->lbal & 0xff); 12751e999736SAlan Cox 1276a5987e0aSTejun Heo return sectors; 12771e999736SAlan Cox } 12781e999736SAlan Cox 1279a5987e0aSTejun Heo u64 ata_tf_to_lba(const struct ata_taskfile *tf) 12801e999736SAlan Cox { 12811e999736SAlan Cox u64 sectors = 0; 12821e999736SAlan Cox 12831e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 12841e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 12851e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 12861e999736SAlan Cox sectors |= (tf->lbal & 0xff); 12871e999736SAlan Cox 1288a5987e0aSTejun Heo return sectors; 12891e999736SAlan Cox } 12901e999736SAlan Cox 12911e999736SAlan Cox /** 1292c728a914STejun Heo * ata_read_native_max_address - Read native max address 1293c728a914STejun Heo * @dev: target device 1294c728a914STejun Heo * @max_sectors: out parameter for the result native max address 12951e999736SAlan Cox * 1296c728a914STejun Heo * Perform an LBA48 or LBA28 native size query upon the device in 1297c728a914STejun Heo * question. 1298c728a914STejun Heo * 1299c728a914STejun Heo * RETURNS: 1300c728a914STejun Heo * 0 on success, -EACCES if command is aborted by the drive. 1301c728a914STejun Heo * -EIO on other errors. 13021e999736SAlan Cox */ 1303c728a914STejun Heo static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 13041e999736SAlan Cox { 1305c728a914STejun Heo unsigned int err_mask; 13061e999736SAlan Cox struct ata_taskfile tf; 1307c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 13081e999736SAlan Cox 13091e999736SAlan Cox ata_tf_init(dev, &tf); 13101e999736SAlan Cox 1311c728a914STejun Heo /* always clear all address registers */ 13121e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1313c728a914STejun Heo 1314c728a914STejun Heo if (lba48) { 1315c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 1316c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 1317c728a914STejun Heo } else 1318c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX; 1319c728a914STejun Heo 13201e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 1321c728a914STejun Heo tf.device |= ATA_LBA; 13221e999736SAlan Cox 13232b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1324c728a914STejun Heo if (err_mask) { 1325c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to read native " 1326c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 1327c728a914STejun Heo if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 1328c728a914STejun Heo return -EACCES; 1329c728a914STejun Heo return -EIO; 1330c728a914STejun Heo } 1331c728a914STejun Heo 1332c728a914STejun Heo if (lba48) 1333a5987e0aSTejun Heo *max_sectors = ata_tf_to_lba48(&tf) + 1; 1334c728a914STejun Heo else 1335a5987e0aSTejun Heo *max_sectors = ata_tf_to_lba(&tf) + 1; 133693328e11SAlan Cox if (dev->horkage & ATA_HORKAGE_HPA_SIZE) 133793328e11SAlan Cox (*max_sectors)--; 13381e999736SAlan Cox return 0; 13391e999736SAlan Cox } 13401e999736SAlan Cox 13411e999736SAlan Cox /** 1342c728a914STejun Heo * ata_set_max_sectors - Set max sectors 1343c728a914STejun Heo * @dev: target device 13446b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 13451e999736SAlan Cox * 1346c728a914STejun Heo * Set max sectors of @dev to @new_sectors. 1347c728a914STejun Heo * 1348c728a914STejun Heo * RETURNS: 1349c728a914STejun Heo * 0 on success, -EACCES if command is aborted or denied (due to 1350c728a914STejun Heo * previous non-volatile SET_MAX) by the drive. -EIO on other 1351c728a914STejun Heo * errors. 13521e999736SAlan Cox */ 135305027adcSTejun Heo static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 13541e999736SAlan Cox { 1355c728a914STejun Heo unsigned int err_mask; 13561e999736SAlan Cox struct ata_taskfile tf; 1357c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 13581e999736SAlan Cox 13591e999736SAlan Cox new_sectors--; 13601e999736SAlan Cox 13611e999736SAlan Cox ata_tf_init(dev, &tf); 13621e999736SAlan Cox 1363c728a914STejun Heo tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 13641e999736SAlan Cox 1365c728a914STejun Heo if (lba48) { 1366c728a914STejun Heo tf.command = ATA_CMD_SET_MAX_EXT; 1367c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 13681e999736SAlan Cox 13691e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 13701e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 13711e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 13721e582ba4STejun Heo } else { 13731e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 1374c728a914STejun Heo 13751e582ba4STejun Heo tf.device |= (new_sectors >> 24) & 0xf; 13761e582ba4STejun Heo } 13771e582ba4STejun Heo 13781e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 1379c728a914STejun Heo tf.device |= ATA_LBA; 13801e999736SAlan Cox 13811e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 13821e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 13831e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 13841e999736SAlan Cox 13852b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1386c728a914STejun Heo if (err_mask) { 1387c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to set " 1388c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 1389c728a914STejun Heo if (err_mask == AC_ERR_DEV && 1390c728a914STejun Heo (tf.feature & (ATA_ABORTED | ATA_IDNF))) 1391c728a914STejun Heo return -EACCES; 1392c728a914STejun Heo return -EIO; 1393c728a914STejun Heo } 1394c728a914STejun Heo 13951e999736SAlan Cox return 0; 13961e999736SAlan Cox } 13971e999736SAlan Cox 13981e999736SAlan Cox /** 13991e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 14001e999736SAlan Cox * @dev: Device to resize 14011e999736SAlan Cox * 14021e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 14031e999736SAlan Cox * it if required to the full size of the media. The caller must check 14041e999736SAlan Cox * the drive has the HPA feature set enabled. 140505027adcSTejun Heo * 140605027adcSTejun Heo * RETURNS: 140705027adcSTejun Heo * 0 on success, -errno on failure. 14081e999736SAlan Cox */ 140905027adcSTejun Heo static int ata_hpa_resize(struct ata_device *dev) 14101e999736SAlan Cox { 141105027adcSTejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 141205027adcSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 141305027adcSTejun Heo u64 sectors = ata_id_n_sectors(dev->id); 141405027adcSTejun Heo u64 native_sectors; 1415c728a914STejun Heo int rc; 14161e999736SAlan Cox 141705027adcSTejun Heo /* do we need to do it? */ 141805027adcSTejun Heo if (dev->class != ATA_DEV_ATA || 141905027adcSTejun Heo !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 142005027adcSTejun Heo (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) 1421c728a914STejun Heo return 0; 14221e999736SAlan Cox 142305027adcSTejun Heo /* read native max address */ 142405027adcSTejun Heo rc = ata_read_native_max_address(dev, &native_sectors); 142505027adcSTejun Heo if (rc) { 1426dda7aba1STejun Heo /* If device aborted the command or HPA isn't going to 1427dda7aba1STejun Heo * be unlocked, skip HPA resizing. 142805027adcSTejun Heo */ 1429dda7aba1STejun Heo if (rc == -EACCES || !ata_ignore_hpa) { 143005027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "HPA support seems " 1431dda7aba1STejun Heo "broken, skipping HPA handling\n"); 143205027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 143305027adcSTejun Heo 143405027adcSTejun Heo /* we can continue if device aborted the command */ 143505027adcSTejun Heo if (rc == -EACCES) 143605027adcSTejun Heo rc = 0; 143705027adcSTejun Heo } 143805027adcSTejun Heo 143905027adcSTejun Heo return rc; 144005027adcSTejun Heo } 144105027adcSTejun Heo 144205027adcSTejun Heo /* nothing to do? */ 144305027adcSTejun Heo if (native_sectors <= sectors || !ata_ignore_hpa) { 144405027adcSTejun Heo if (!print_info || native_sectors == sectors) 144505027adcSTejun Heo return 0; 144605027adcSTejun Heo 144705027adcSTejun Heo if (native_sectors > sectors) 14481e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 144905027adcSTejun Heo "HPA detected: current %llu, native %llu\n", 145005027adcSTejun Heo (unsigned long long)sectors, 145105027adcSTejun Heo (unsigned long long)native_sectors); 145205027adcSTejun Heo else if (native_sectors < sectors) 145305027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, 145405027adcSTejun Heo "native sectors (%llu) is smaller than " 145505027adcSTejun Heo "sectors (%llu)\n", 145605027adcSTejun Heo (unsigned long long)native_sectors, 145705027adcSTejun Heo (unsigned long long)sectors); 145805027adcSTejun Heo return 0; 14591e999736SAlan Cox } 146037301a55STejun Heo 146105027adcSTejun Heo /* let's unlock HPA */ 146205027adcSTejun Heo rc = ata_set_max_sectors(dev, native_sectors); 146305027adcSTejun Heo if (rc == -EACCES) { 146405027adcSTejun Heo /* if device aborted the command, skip HPA resizing */ 146505027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "device aborted resize " 146605027adcSTejun Heo "(%llu -> %llu), skipping HPA handling\n", 146705027adcSTejun Heo (unsigned long long)sectors, 146805027adcSTejun Heo (unsigned long long)native_sectors); 146905027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 147005027adcSTejun Heo return 0; 147105027adcSTejun Heo } else if (rc) 147205027adcSTejun Heo return rc; 147305027adcSTejun Heo 147405027adcSTejun Heo /* re-read IDENTIFY data */ 147505027adcSTejun Heo rc = ata_dev_reread_id(dev, 0); 147605027adcSTejun Heo if (rc) { 147705027adcSTejun Heo ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " 147805027adcSTejun Heo "data after HPA resizing\n"); 147905027adcSTejun Heo return rc; 148005027adcSTejun Heo } 148105027adcSTejun Heo 148205027adcSTejun Heo if (print_info) { 148305027adcSTejun Heo u64 new_sectors = ata_id_n_sectors(dev->id); 148405027adcSTejun Heo ata_dev_printk(dev, KERN_INFO, 148505027adcSTejun Heo "HPA unlocked: %llu -> %llu, native %llu\n", 148605027adcSTejun Heo (unsigned long long)sectors, 148705027adcSTejun Heo (unsigned long long)new_sectors, 148805027adcSTejun Heo (unsigned long long)native_sectors); 148905027adcSTejun Heo } 149005027adcSTejun Heo 149105027adcSTejun Heo return 0; 14921e999736SAlan Cox } 14931e999736SAlan Cox 1494c6fd2807SJeff Garzik /** 1495c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1496c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1497c6fd2807SJeff Garzik * 1498c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1499c6fd2807SJeff Garzik * page. 1500c6fd2807SJeff Garzik * 1501c6fd2807SJeff Garzik * LOCKING: 1502c6fd2807SJeff Garzik * caller. 1503c6fd2807SJeff Garzik */ 1504c6fd2807SJeff Garzik 1505c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1506c6fd2807SJeff Garzik { 1507c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1508c6fd2807SJeff Garzik "53==0x%04x " 1509c6fd2807SJeff Garzik "63==0x%04x " 1510c6fd2807SJeff Garzik "64==0x%04x " 1511c6fd2807SJeff Garzik "75==0x%04x \n", 1512c6fd2807SJeff Garzik id[49], 1513c6fd2807SJeff Garzik id[53], 1514c6fd2807SJeff Garzik id[63], 1515c6fd2807SJeff Garzik id[64], 1516c6fd2807SJeff Garzik id[75]); 1517c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1518c6fd2807SJeff Garzik "81==0x%04x " 1519c6fd2807SJeff Garzik "82==0x%04x " 1520c6fd2807SJeff Garzik "83==0x%04x " 1521c6fd2807SJeff Garzik "84==0x%04x \n", 1522c6fd2807SJeff Garzik id[80], 1523c6fd2807SJeff Garzik id[81], 1524c6fd2807SJeff Garzik id[82], 1525c6fd2807SJeff Garzik id[83], 1526c6fd2807SJeff Garzik id[84]); 1527c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1528c6fd2807SJeff Garzik "93==0x%04x\n", 1529c6fd2807SJeff Garzik id[88], 1530c6fd2807SJeff Garzik id[93]); 1531c6fd2807SJeff Garzik } 1532c6fd2807SJeff Garzik 1533c6fd2807SJeff Garzik /** 1534c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1535c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1536c6fd2807SJeff Garzik * 1537c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1538c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1539c6fd2807SJeff Garzik * 1540c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1541c6fd2807SJeff Garzik * 1542c6fd2807SJeff Garzik * LOCKING: 1543c6fd2807SJeff Garzik * None. 1544c6fd2807SJeff Garzik * 1545c6fd2807SJeff Garzik * RETURNS: 1546c6fd2807SJeff Garzik * Computed xfermask 1547c6fd2807SJeff Garzik */ 15487dc951aeSTejun Heo unsigned long ata_id_xfermask(const u16 *id) 1549c6fd2807SJeff Garzik { 15507dc951aeSTejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 1551c6fd2807SJeff Garzik 1552c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1553c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1554c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1555c6fd2807SJeff Garzik pio_mask <<= 3; 1556c6fd2807SJeff Garzik pio_mask |= 0x7; 1557c6fd2807SJeff Garzik } else { 1558c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1559c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1560c6fd2807SJeff Garzik * a mask. 1561c6fd2807SJeff Garzik */ 15627a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 156346767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 156446767aebSAlan Cox pio_mask = (2 << mode) - 1; 156546767aebSAlan Cox else 156646767aebSAlan Cox pio_mask = 1; 1567c6fd2807SJeff Garzik 1568c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1569c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1570c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1571c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1572c6fd2807SJeff Garzik * will get this right anyway 1573c6fd2807SJeff Garzik */ 1574c6fd2807SJeff Garzik } 1575c6fd2807SJeff Garzik 1576c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1577c6fd2807SJeff Garzik 1578b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1579b352e57dSAlan Cox /* 1580b352e57dSAlan Cox * Process compact flash extended modes 1581b352e57dSAlan Cox */ 1582b352e57dSAlan Cox int pio = id[163] & 0x7; 1583b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1584b352e57dSAlan Cox 1585b352e57dSAlan Cox if (pio) 1586b352e57dSAlan Cox pio_mask |= (1 << 5); 1587b352e57dSAlan Cox if (pio > 1) 1588b352e57dSAlan Cox pio_mask |= (1 << 6); 1589b352e57dSAlan Cox if (dma) 1590b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1591b352e57dSAlan Cox if (dma > 1) 1592b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1593b352e57dSAlan Cox } 1594b352e57dSAlan Cox 1595c6fd2807SJeff Garzik udma_mask = 0; 1596c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1597c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1598c6fd2807SJeff Garzik 1599c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1600c6fd2807SJeff Garzik } 1601c6fd2807SJeff Garzik 1602c6fd2807SJeff Garzik /** 1603442eacc3SJeff Garzik * ata_pio_queue_task - Queue port_task 1604c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1605c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 160665f27f38SDavid Howells * @data: data for @fn to use 1607341c2c95STejun Heo * @delay: delay time in msecs for workqueue function 1608c6fd2807SJeff Garzik * 1609c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1610c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1611c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1612c6fd2807SJeff Garzik * one task is active at any given time. 1613c6fd2807SJeff Garzik * 1614c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1615442eacc3SJeff Garzik * port_task and EH. ata_pio_queue_task() may be ignored for EH 1616c6fd2807SJeff Garzik * synchronization. 1617c6fd2807SJeff Garzik * 1618c6fd2807SJeff Garzik * LOCKING: 1619c6fd2807SJeff Garzik * Inherited from caller. 1620c6fd2807SJeff Garzik */ 1621624d5c51STejun Heo void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay) 1622c6fd2807SJeff Garzik { 162365f27f38SDavid Howells ap->port_task_data = data; 1624c6fd2807SJeff Garzik 162545a66c1cSOleg Nesterov /* may fail if ata_port_flush_task() in progress */ 1626341c2c95STejun Heo queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay)); 1627c6fd2807SJeff Garzik } 1628c6fd2807SJeff Garzik 1629c6fd2807SJeff Garzik /** 1630c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1631c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1632c6fd2807SJeff Garzik * 1633c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1634c6fd2807SJeff Garzik * be running or scheduled. 1635c6fd2807SJeff Garzik * 1636c6fd2807SJeff Garzik * LOCKING: 1637c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1638c6fd2807SJeff Garzik */ 1639c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1640c6fd2807SJeff Garzik { 1641c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1642c6fd2807SJeff Garzik 164345a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->port_task); 1644c6fd2807SJeff Garzik 1645c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 16467f5e4e8dSHarvey Harrison ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); 1647c6fd2807SJeff Garzik } 1648c6fd2807SJeff Garzik 16497102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1650c6fd2807SJeff Garzik { 1651c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1652c6fd2807SJeff Garzik 1653c6fd2807SJeff Garzik complete(waiting); 1654c6fd2807SJeff Garzik } 1655c6fd2807SJeff Garzik 1656c6fd2807SJeff Garzik /** 16572432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1658c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1659c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1660c6fd2807SJeff Garzik * @cdb: CDB for packet command 1661c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 16625c1ad8b3SRandy Dunlap * @sgl: sg list for the data buffer of the command 16632432697bSTejun Heo * @n_elem: Number of sg entries 16642b789108STejun Heo * @timeout: Timeout in msecs (0 for default) 1665c6fd2807SJeff Garzik * 1666c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1667c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1668c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1669c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1670c6fd2807SJeff Garzik * clean up after timeout. 1671c6fd2807SJeff Garzik * 1672c6fd2807SJeff Garzik * LOCKING: 1673c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1674c6fd2807SJeff Garzik * 1675c6fd2807SJeff Garzik * RETURNS: 1676c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1677c6fd2807SJeff Garzik */ 16782432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1679c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 168087260216SJens Axboe int dma_dir, struct scatterlist *sgl, 16812b789108STejun Heo unsigned int n_elem, unsigned long timeout) 1682c6fd2807SJeff Garzik { 16839af5c9c9STejun Heo struct ata_link *link = dev->link; 16849af5c9c9STejun Heo struct ata_port *ap = link->ap; 1685c6fd2807SJeff Garzik u8 command = tf->command; 168687fbc5a0STejun Heo int auto_timeout = 0; 1687c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1688c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1689c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1690da917d69STejun Heo int preempted_nr_active_links; 1691c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1692c6fd2807SJeff Garzik unsigned long flags; 1693c6fd2807SJeff Garzik unsigned int err_mask; 1694c6fd2807SJeff Garzik int rc; 1695c6fd2807SJeff Garzik 1696c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1697c6fd2807SJeff Garzik 1698c6fd2807SJeff Garzik /* no internal command while frozen */ 1699c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1700c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1701c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1702c6fd2807SJeff Garzik } 1703c6fd2807SJeff Garzik 1704c6fd2807SJeff Garzik /* initialize internal qc */ 1705c6fd2807SJeff Garzik 1706c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1707c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1708c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1709c6fd2807SJeff Garzik * EH stuff without converting to it. 1710c6fd2807SJeff Garzik */ 1711c6fd2807SJeff Garzik if (ap->ops->error_handler) 1712c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1713c6fd2807SJeff Garzik else 1714c6fd2807SJeff Garzik tag = 0; 1715c6fd2807SJeff Garzik 1716c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1717c6fd2807SJeff Garzik 1718c6fd2807SJeff Garzik qc->tag = tag; 1719c6fd2807SJeff Garzik qc->scsicmd = NULL; 1720c6fd2807SJeff Garzik qc->ap = ap; 1721c6fd2807SJeff Garzik qc->dev = dev; 1722c6fd2807SJeff Garzik ata_qc_reinit(qc); 1723c6fd2807SJeff Garzik 17249af5c9c9STejun Heo preempted_tag = link->active_tag; 17259af5c9c9STejun Heo preempted_sactive = link->sactive; 1726c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1727da917d69STejun Heo preempted_nr_active_links = ap->nr_active_links; 17289af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 17299af5c9c9STejun Heo link->sactive = 0; 1730c6fd2807SJeff Garzik ap->qc_active = 0; 1731da917d69STejun Heo ap->nr_active_links = 0; 1732c6fd2807SJeff Garzik 1733c6fd2807SJeff Garzik /* prepare & issue qc */ 1734c6fd2807SJeff Garzik qc->tf = *tf; 1735c6fd2807SJeff Garzik if (cdb) 1736c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1737c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1738c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1739c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 17402432697bSTejun Heo unsigned int i, buflen = 0; 174187260216SJens Axboe struct scatterlist *sg; 17422432697bSTejun Heo 174387260216SJens Axboe for_each_sg(sgl, sg, n_elem, i) 174487260216SJens Axboe buflen += sg->length; 17452432697bSTejun Heo 174687260216SJens Axboe ata_sg_init(qc, sgl, n_elem); 174749c80429SBrian King qc->nbytes = buflen; 1748c6fd2807SJeff Garzik } 1749c6fd2807SJeff Garzik 1750c6fd2807SJeff Garzik qc->private_data = &wait; 1751c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1752c6fd2807SJeff Garzik 1753c6fd2807SJeff Garzik ata_qc_issue(qc); 1754c6fd2807SJeff Garzik 1755c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1756c6fd2807SJeff Garzik 175787fbc5a0STejun Heo if (!timeout) { 175887fbc5a0STejun Heo if (ata_probe_timeout) 1759341c2c95STejun Heo timeout = ata_probe_timeout * 1000; 176087fbc5a0STejun Heo else { 176187fbc5a0STejun Heo timeout = ata_internal_cmd_timeout(dev, command); 176287fbc5a0STejun Heo auto_timeout = 1; 176387fbc5a0STejun Heo } 176487fbc5a0STejun Heo } 17652b789108STejun Heo 17662b789108STejun Heo rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1767c6fd2807SJeff Garzik 1768c6fd2807SJeff Garzik ata_port_flush_task(ap); 1769c6fd2807SJeff Garzik 1770c6fd2807SJeff Garzik if (!rc) { 1771c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1772c6fd2807SJeff Garzik 1773c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1774c6fd2807SJeff Garzik * following test prevents us from completing the qc 1775c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1776c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1777c6fd2807SJeff Garzik */ 1778c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1779c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1780c6fd2807SJeff Garzik 1781c6fd2807SJeff Garzik if (ap->ops->error_handler) 1782c6fd2807SJeff Garzik ata_port_freeze(ap); 1783c6fd2807SJeff Garzik else 1784c6fd2807SJeff Garzik ata_qc_complete(qc); 1785c6fd2807SJeff Garzik 1786c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1787c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1788c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1789c6fd2807SJeff Garzik } 1790c6fd2807SJeff Garzik 1791c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1792c6fd2807SJeff Garzik } 1793c6fd2807SJeff Garzik 1794c6fd2807SJeff Garzik /* do post_internal_cmd */ 1795c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1796c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1797c6fd2807SJeff Garzik 1798a51d644aSTejun Heo /* perform minimal error analysis */ 1799a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1800a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1801a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1802a51d644aSTejun Heo 1803a51d644aSTejun Heo if (!qc->err_mask) 1804c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1805a51d644aSTejun Heo 1806a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1807a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1808c6fd2807SJeff Garzik } 1809c6fd2807SJeff Garzik 1810c6fd2807SJeff Garzik /* finish up */ 1811c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1812c6fd2807SJeff Garzik 1813c6fd2807SJeff Garzik *tf = qc->result_tf; 1814c6fd2807SJeff Garzik err_mask = qc->err_mask; 1815c6fd2807SJeff Garzik 1816c6fd2807SJeff Garzik ata_qc_free(qc); 18179af5c9c9STejun Heo link->active_tag = preempted_tag; 18189af5c9c9STejun Heo link->sactive = preempted_sactive; 1819c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1820da917d69STejun Heo ap->nr_active_links = preempted_nr_active_links; 1821c6fd2807SJeff Garzik 1822c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1823c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1824c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1825c6fd2807SJeff Garzik * port. 1826c6fd2807SJeff Garzik * 1827c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1828c6fd2807SJeff Garzik * command failure results in disabling the device in the 1829c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1830c6fd2807SJeff Garzik * 1831c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1832c6fd2807SJeff Garzik */ 1833c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1834c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1835c6fd2807SJeff Garzik ata_port_probe(ap); 1836c6fd2807SJeff Garzik } 1837c6fd2807SJeff Garzik 1838c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1839c6fd2807SJeff Garzik 184087fbc5a0STejun Heo if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) 184187fbc5a0STejun Heo ata_internal_cmd_timed_out(dev, command); 184287fbc5a0STejun Heo 1843c6fd2807SJeff Garzik return err_mask; 1844c6fd2807SJeff Garzik } 1845c6fd2807SJeff Garzik 1846c6fd2807SJeff Garzik /** 184733480a0eSTejun Heo * ata_exec_internal - execute libata internal command 18482432697bSTejun Heo * @dev: Device to which the command is sent 18492432697bSTejun Heo * @tf: Taskfile registers for the command and the result 18502432697bSTejun Heo * @cdb: CDB for packet command 18512432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 18522432697bSTejun Heo * @buf: Data buffer of the command 18532432697bSTejun Heo * @buflen: Length of data buffer 18542b789108STejun Heo * @timeout: Timeout in msecs (0 for default) 18552432697bSTejun Heo * 18562432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 18572432697bSTejun Heo * buffer instead of sg list. 18582432697bSTejun Heo * 18592432697bSTejun Heo * LOCKING: 18602432697bSTejun Heo * None. Should be called with kernel context, might sleep. 18612432697bSTejun Heo * 18622432697bSTejun Heo * RETURNS: 18632432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 18642432697bSTejun Heo */ 18652432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 18662432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 18672b789108STejun Heo int dma_dir, void *buf, unsigned int buflen, 18682b789108STejun Heo unsigned long timeout) 18692432697bSTejun Heo { 187033480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 187133480a0eSTejun Heo unsigned int n_elem = 0; 18722432697bSTejun Heo 187333480a0eSTejun Heo if (dma_dir != DMA_NONE) { 187433480a0eSTejun Heo WARN_ON(!buf); 18752432697bSTejun Heo sg_init_one(&sg, buf, buflen); 187633480a0eSTejun Heo psg = &sg; 187733480a0eSTejun Heo n_elem++; 187833480a0eSTejun Heo } 18792432697bSTejun Heo 18802b789108STejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, 18812b789108STejun Heo timeout); 18822432697bSTejun Heo } 18832432697bSTejun Heo 18842432697bSTejun Heo /** 1885c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1886c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1887c6fd2807SJeff Garzik * @cmd: Opcode to execute 1888c6fd2807SJeff Garzik * 1889c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1890c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1891c6fd2807SJeff Garzik * 1892c6fd2807SJeff Garzik * LOCKING: 1893c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1894c6fd2807SJeff Garzik * 1895c6fd2807SJeff Garzik * RETURNS: 1896c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1897c6fd2807SJeff Garzik */ 1898c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1899c6fd2807SJeff Garzik { 1900c6fd2807SJeff Garzik struct ata_taskfile tf; 1901c6fd2807SJeff Garzik 1902c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1903c6fd2807SJeff Garzik 1904c6fd2807SJeff Garzik tf.command = cmd; 1905c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1906c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1907c6fd2807SJeff Garzik 19082b789108STejun Heo return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1909c6fd2807SJeff Garzik } 1910c6fd2807SJeff Garzik 1911c6fd2807SJeff Garzik /** 1912c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1913c6fd2807SJeff Garzik * @adev: ATA device 1914c6fd2807SJeff Garzik * 1915c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1916c6fd2807SJeff Garzik * by various controllers for chip configuration. 1917c6fd2807SJeff Garzik */ 1918c6fd2807SJeff Garzik 1919c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1920c6fd2807SJeff Garzik { 1921432729f0SAlan Cox /* Controller doesn't support IORDY. Probably a pointless check 1922432729f0SAlan Cox as the caller should know this */ 19239af5c9c9STejun Heo if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1924c6fd2807SJeff Garzik return 0; 1925432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1926432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1927c6fd2807SJeff Garzik return 1; 1928432729f0SAlan Cox /* We turn it on when possible */ 1929432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1930432729f0SAlan Cox return 1; 1931432729f0SAlan Cox return 0; 1932432729f0SAlan Cox } 1933c6fd2807SJeff Garzik 1934432729f0SAlan Cox /** 1935432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 1936432729f0SAlan Cox * @adev: ATA device 1937432729f0SAlan Cox * 1938432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 1939432729f0SAlan Cox * -1 if no iordy mode is available. 1940432729f0SAlan Cox */ 1941432729f0SAlan Cox 1942432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1943432729f0SAlan Cox { 1944c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1945c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1946432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1947c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1948c6fd2807SJeff Garzik if (pio) { 1949c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1950c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1951432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1952432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 1953c6fd2807SJeff Garzik } 1954c6fd2807SJeff Garzik } 1955432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1956c6fd2807SJeff Garzik } 1957c6fd2807SJeff Garzik 1958c6fd2807SJeff Garzik /** 1959963e4975SAlan Cox * ata_do_dev_read_id - default ID read method 1960963e4975SAlan Cox * @dev: device 1961963e4975SAlan Cox * @tf: proposed taskfile 1962963e4975SAlan Cox * @id: data buffer 1963963e4975SAlan Cox * 1964963e4975SAlan Cox * Issue the identify taskfile and hand back the buffer containing 1965963e4975SAlan Cox * identify data. For some RAID controllers and for pre ATA devices 1966963e4975SAlan Cox * this function is wrapped or replaced by the driver 1967963e4975SAlan Cox */ 1968963e4975SAlan Cox unsigned int ata_do_dev_read_id(struct ata_device *dev, 1969963e4975SAlan Cox struct ata_taskfile *tf, u16 *id) 1970963e4975SAlan Cox { 1971963e4975SAlan Cox return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, 1972963e4975SAlan Cox id, sizeof(id[0]) * ATA_ID_WORDS, 0); 1973963e4975SAlan Cox } 1974963e4975SAlan Cox 1975963e4975SAlan Cox /** 1976c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1977c6fd2807SJeff Garzik * @dev: target device 1978c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1979bff04647STejun Heo * @flags: ATA_READID_* flags 1980c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1981c6fd2807SJeff Garzik * 1982c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1983c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1984c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1985c6fd2807SJeff Garzik * for pre-ATA4 drives. 1986c6fd2807SJeff Garzik * 198750a99018SAlan Cox * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 198850a99018SAlan Cox * now we abort if we hit that case. 198950a99018SAlan Cox * 1990c6fd2807SJeff Garzik * LOCKING: 1991c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1992c6fd2807SJeff Garzik * 1993c6fd2807SJeff Garzik * RETURNS: 1994c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1995c6fd2807SJeff Garzik */ 1996c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1997bff04647STejun Heo unsigned int flags, u16 *id) 1998c6fd2807SJeff Garzik { 19999af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 2000c6fd2807SJeff Garzik unsigned int class = *p_class; 2001c6fd2807SJeff Garzik struct ata_taskfile tf; 2002c6fd2807SJeff Garzik unsigned int err_mask = 0; 2003c6fd2807SJeff Garzik const char *reason; 200454936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 2005c6fd2807SJeff Garzik int rc; 2006c6fd2807SJeff Garzik 2007c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 20087f5e4e8dSHarvey Harrison ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); 2009c6fd2807SJeff Garzik 2010c6fd2807SJeff Garzik retry: 2011c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 2012c6fd2807SJeff Garzik 2013c6fd2807SJeff Garzik switch (class) { 2014c6fd2807SJeff Garzik case ATA_DEV_ATA: 2015c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 2016c6fd2807SJeff Garzik break; 2017c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 2018c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 2019c6fd2807SJeff Garzik break; 2020c6fd2807SJeff Garzik default: 2021c6fd2807SJeff Garzik rc = -ENODEV; 2022c6fd2807SJeff Garzik reason = "unsupported class"; 2023c6fd2807SJeff Garzik goto err_out; 2024c6fd2807SJeff Garzik } 2025c6fd2807SJeff Garzik 2026c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 202781afe893STejun Heo 202881afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 202981afe893STejun Heo * sure those are properly initialized. 203081afe893STejun Heo */ 203181afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 203281afe893STejun Heo 203381afe893STejun Heo /* Device presence detection is unreliable on some 203481afe893STejun Heo * controllers. Always poll IDENTIFY if available. 203581afe893STejun Heo */ 203681afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 2037c6fd2807SJeff Garzik 2038963e4975SAlan Cox if (ap->ops->read_id) 2039963e4975SAlan Cox err_mask = ap->ops->read_id(dev, &tf, id); 2040963e4975SAlan Cox else 2041963e4975SAlan Cox err_mask = ata_do_dev_read_id(dev, &tf, id); 2042963e4975SAlan Cox 2043c6fd2807SJeff Garzik if (err_mask) { 2044800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 20451ffc151fSTejun Heo ata_dev_printk(dev, KERN_DEBUG, 20461ffc151fSTejun Heo "NODEV after polling detection\n"); 204755a8e2c8STejun Heo return -ENOENT; 204855a8e2c8STejun Heo } 204955a8e2c8STejun Heo 20501ffc151fSTejun Heo if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 20511ffc151fSTejun Heo /* Device or controller might have reported 20521ffc151fSTejun Heo * the wrong device class. Give a shot at the 20531ffc151fSTejun Heo * other IDENTIFY if the current one is 20541ffc151fSTejun Heo * aborted by the device. 205554936f8bSTejun Heo */ 20561ffc151fSTejun Heo if (may_fallback) { 205754936f8bSTejun Heo may_fallback = 0; 205854936f8bSTejun Heo 205954936f8bSTejun Heo if (class == ATA_DEV_ATA) 206054936f8bSTejun Heo class = ATA_DEV_ATAPI; 206154936f8bSTejun Heo else 206254936f8bSTejun Heo class = ATA_DEV_ATA; 206354936f8bSTejun Heo goto retry; 206454936f8bSTejun Heo } 206554936f8bSTejun Heo 20661ffc151fSTejun Heo /* Control reaches here iff the device aborted 20671ffc151fSTejun Heo * both flavors of IDENTIFYs which happens 20681ffc151fSTejun Heo * sometimes with phantom devices. 20691ffc151fSTejun Heo */ 20701ffc151fSTejun Heo ata_dev_printk(dev, KERN_DEBUG, 20711ffc151fSTejun Heo "both IDENTIFYs aborted, assuming NODEV\n"); 20721ffc151fSTejun Heo return -ENOENT; 20731ffc151fSTejun Heo } 20741ffc151fSTejun Heo 2075c6fd2807SJeff Garzik rc = -EIO; 2076c6fd2807SJeff Garzik reason = "I/O error"; 2077c6fd2807SJeff Garzik goto err_out; 2078c6fd2807SJeff Garzik } 2079c6fd2807SJeff Garzik 208054936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 208154936f8bSTejun Heo * successfully at least once. 208254936f8bSTejun Heo */ 208354936f8bSTejun Heo may_fallback = 0; 208454936f8bSTejun Heo 2085c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 2086c6fd2807SJeff Garzik 2087c6fd2807SJeff Garzik /* sanity check */ 2088c6fd2807SJeff Garzik rc = -EINVAL; 20896070068bSAlan Cox reason = "device reports invalid type"; 20904a3381feSJeff Garzik 20914a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 20924a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 20934a3381feSJeff Garzik goto err_out; 20944a3381feSJeff Garzik } else { 20954a3381feSJeff Garzik if (ata_id_is_ata(id)) 2096c6fd2807SJeff Garzik goto err_out; 2097c6fd2807SJeff Garzik } 2098c6fd2807SJeff Garzik 2099169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 2100169439c2SMark Lord tried_spinup = 1; 2101169439c2SMark Lord /* 2102169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 2103169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 2104169439c2SMark Lord * anything other than the original IDENTIFY command. 2105169439c2SMark Lord */ 2106218f3d30SJeff Garzik err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 2107fb0582f9SRyan Power if (err_mask && id[2] != 0x738c) { 2108169439c2SMark Lord rc = -EIO; 2109169439c2SMark Lord reason = "SPINUP failed"; 2110169439c2SMark Lord goto err_out; 2111169439c2SMark Lord } 2112169439c2SMark Lord /* 2113169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 2114169439c2SMark Lord * we now must reissue the IDENTIFY command. 2115169439c2SMark Lord */ 2116169439c2SMark Lord if (id[2] == 0x37c8) 2117169439c2SMark Lord goto retry; 2118169439c2SMark Lord } 2119169439c2SMark Lord 2120bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 2121c6fd2807SJeff Garzik /* 2122c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 2123c6fd2807SJeff Garzik * SRST RESET 212450a99018SAlan Cox * IDENTIFY (optional in early ATA) 212550a99018SAlan Cox * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 2126c6fd2807SJeff Garzik * anything else.. 2127c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 212850a99018SAlan Cox * 212950a99018SAlan Cox * Note that ATA4 says lba is mandatory so the second check 213050a99018SAlan Cox * shoud never trigger. 2131c6fd2807SJeff Garzik */ 2132c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 2133c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 2134c6fd2807SJeff Garzik if (err_mask) { 2135c6fd2807SJeff Garzik rc = -EIO; 2136c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 2137c6fd2807SJeff Garzik goto err_out; 2138c6fd2807SJeff Garzik } 2139c6fd2807SJeff Garzik 2140c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 2141c6fd2807SJeff Garzik * changed. reread the identify device info. 2142c6fd2807SJeff Garzik */ 2143bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 2144c6fd2807SJeff Garzik goto retry; 2145c6fd2807SJeff Garzik } 2146c6fd2807SJeff Garzik } 2147c6fd2807SJeff Garzik 2148c6fd2807SJeff Garzik *p_class = class; 2149c6fd2807SJeff Garzik 2150c6fd2807SJeff Garzik return 0; 2151c6fd2807SJeff Garzik 2152c6fd2807SJeff Garzik err_out: 2153c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2154c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 2155c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 2156c6fd2807SJeff Garzik return rc; 2157c6fd2807SJeff Garzik } 2158c6fd2807SJeff Garzik 2159c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 2160c6fd2807SJeff Garzik { 21619af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 21629af5c9c9STejun Heo return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2163c6fd2807SJeff Garzik } 2164c6fd2807SJeff Garzik 2165c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 2166c6fd2807SJeff Garzik char *desc, size_t desc_sz) 2167c6fd2807SJeff Garzik { 21689af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 2169c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2170c6fd2807SJeff Garzik 2171c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 2172c6fd2807SJeff Garzik desc[0] = '\0'; 2173c6fd2807SJeff Garzik return; 2174c6fd2807SJeff Garzik } 217575683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_NONCQ) { 21766919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 21776919a0a6SAlan Cox return; 21786919a0a6SAlan Cox } 2179c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 2180cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 2181c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 2182c6fd2807SJeff Garzik } 2183c6fd2807SJeff Garzik 2184c6fd2807SJeff Garzik if (hdepth >= ddepth) 2185c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 2186c6fd2807SJeff Garzik else 2187c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 2188c6fd2807SJeff Garzik } 2189c6fd2807SJeff Garzik 2190c6fd2807SJeff Garzik /** 2191c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 2192c6fd2807SJeff Garzik * @dev: Target device to configure 2193c6fd2807SJeff Garzik * 2194c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 2195c6fd2807SJeff Garzik * driver specific fixups are also applied. 2196c6fd2807SJeff Garzik * 2197c6fd2807SJeff Garzik * LOCKING: 2198c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2199c6fd2807SJeff Garzik * 2200c6fd2807SJeff Garzik * RETURNS: 2201c6fd2807SJeff Garzik * 0 on success, -errno otherwise 2202c6fd2807SJeff Garzik */ 2203efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 2204c6fd2807SJeff Garzik { 22059af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 22069af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 22076746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 2208c6fd2807SJeff Garzik const u16 *id = dev->id; 22097dc951aeSTejun Heo unsigned long xfer_mask; 2210b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 22113f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 22123f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 2213c6fd2807SJeff Garzik int rc; 2214c6fd2807SJeff Garzik 2215c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 221644877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 22177f5e4e8dSHarvey Harrison __func__); 2218c6fd2807SJeff Garzik return 0; 2219c6fd2807SJeff Garzik } 2220c6fd2807SJeff Garzik 2221c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 22227f5e4e8dSHarvey Harrison ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); 2223c6fd2807SJeff Garzik 222475683fe7STejun Heo /* set horkage */ 222575683fe7STejun Heo dev->horkage |= ata_dev_blacklisted(dev); 222633267325STejun Heo ata_force_horkage(dev); 222775683fe7STejun Heo 222850af2fa1STejun Heo if (dev->horkage & ATA_HORKAGE_DISABLE) { 222950af2fa1STejun Heo ata_dev_printk(dev, KERN_INFO, 223050af2fa1STejun Heo "unsupported device, disabling\n"); 223150af2fa1STejun Heo ata_dev_disable(dev); 223250af2fa1STejun Heo return 0; 223350af2fa1STejun Heo } 223450af2fa1STejun Heo 22352486fa56STejun Heo if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 22362486fa56STejun Heo dev->class == ATA_DEV_ATAPI) { 22372486fa56STejun Heo ata_dev_printk(dev, KERN_WARNING, 22382486fa56STejun Heo "WARNING: ATAPI is %s, device ignored.\n", 22392486fa56STejun Heo atapi_enabled ? "not supported with this driver" 22402486fa56STejun Heo : "disabled"); 22412486fa56STejun Heo ata_dev_disable(dev); 22422486fa56STejun Heo return 0; 22432486fa56STejun Heo } 22442486fa56STejun Heo 22456746544cSTejun Heo /* let ACPI work its magic */ 22466746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 22476746544cSTejun Heo if (rc) 22486746544cSTejun Heo return rc; 224908573a86SKristen Carlson Accardi 225005027adcSTejun Heo /* massage HPA, do it early as it might change IDENTIFY data */ 225105027adcSTejun Heo rc = ata_hpa_resize(dev); 225205027adcSTejun Heo if (rc) 225305027adcSTejun Heo return rc; 225405027adcSTejun Heo 2255c6fd2807SJeff Garzik /* print device capabilities */ 2256c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2257c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2258c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 2259c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 22607f5e4e8dSHarvey Harrison __func__, 2261c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 2262c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 2263c6fd2807SJeff Garzik 2264c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 2265c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 2266c6fd2807SJeff Garzik dev->max_sectors = 0; 2267c6fd2807SJeff Garzik dev->cdb_len = 0; 2268c6fd2807SJeff Garzik dev->n_sectors = 0; 2269c6fd2807SJeff Garzik dev->cylinders = 0; 2270c6fd2807SJeff Garzik dev->heads = 0; 2271c6fd2807SJeff Garzik dev->sectors = 0; 2272c6fd2807SJeff Garzik 2273c6fd2807SJeff Garzik /* 2274c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 2275c6fd2807SJeff Garzik */ 2276c6fd2807SJeff Garzik 2277c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 2278c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 2279c6fd2807SJeff Garzik 2280c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2281c6fd2807SJeff Garzik ata_dump_id(id); 2282c6fd2807SJeff Garzik 2283ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 2284ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 2285ef143d57SAlbert Lee sizeof(fwrevbuf)); 2286ef143d57SAlbert Lee 2287ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 2288ef143d57SAlbert Lee sizeof(modelbuf)); 2289ef143d57SAlbert Lee 2290c6fd2807SJeff Garzik /* ATA-specific feature tests */ 2291c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 2292b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 2293b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 229444877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 229544877b4eSTejun Heo "supports DRM functions and may " 229644877b4eSTejun Heo "not be fully accessable.\n"); 2297b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 2298ae8d4ee7SAlan Cox } else { 2299b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 2300ae8d4ee7SAlan Cox /* Warn the user if the device has TPM extensions */ 2301ae8d4ee7SAlan Cox if (ata_id_has_tpm(id)) 2302ae8d4ee7SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2303ae8d4ee7SAlan Cox "supports DRM functions and may " 2304ae8d4ee7SAlan Cox "not be fully accessable.\n"); 2305ae8d4ee7SAlan Cox } 2306b352e57dSAlan Cox 2307c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 2308c6fd2807SJeff Garzik 23093f64f565SEric D. Mudama if (dev->id[59] & 0x100) 23103f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 23113f64f565SEric D. Mudama 2312c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 2313c6fd2807SJeff Garzik const char *lba_desc; 2314c6fd2807SJeff Garzik char ncq_desc[20]; 2315c6fd2807SJeff Garzik 2316c6fd2807SJeff Garzik lba_desc = "LBA"; 2317c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 2318c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 2319c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 2320c6fd2807SJeff Garzik lba_desc = "LBA48"; 23216fc49adbSTejun Heo 23226fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 23236fc49adbSTejun Heo ata_id_has_flush_ext(id)) 23246fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 2325c6fd2807SJeff Garzik } 2326c6fd2807SJeff Garzik 2327c6fd2807SJeff Garzik /* config NCQ */ 2328c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2329c6fd2807SJeff Garzik 2330c6fd2807SJeff Garzik /* print device info to dmesg */ 23313f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 23323f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 23333f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 23343f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 23353f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 23363f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 23373f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 2338c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 23393f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 23403f64f565SEric D. Mudama } 2341c6fd2807SJeff Garzik } else { 2342c6fd2807SJeff Garzik /* CHS */ 2343c6fd2807SJeff Garzik 2344c6fd2807SJeff Garzik /* Default translation */ 2345c6fd2807SJeff Garzik dev->cylinders = id[1]; 2346c6fd2807SJeff Garzik dev->heads = id[3]; 2347c6fd2807SJeff Garzik dev->sectors = id[6]; 2348c6fd2807SJeff Garzik 2349c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 2350c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 2351c6fd2807SJeff Garzik dev->cylinders = id[54]; 2352c6fd2807SJeff Garzik dev->heads = id[55]; 2353c6fd2807SJeff Garzik dev->sectors = id[56]; 2354c6fd2807SJeff Garzik } 2355c6fd2807SJeff Garzik 2356c6fd2807SJeff Garzik /* print device info to dmesg */ 23573f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 2358c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 23593f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 23603f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 23613f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 23623f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 23633f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 23643f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 23653f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 23663f64f565SEric D. Mudama dev->heads, dev->sectors); 23673f64f565SEric D. Mudama } 2368c6fd2807SJeff Garzik } 2369c6fd2807SJeff Garzik 2370c6fd2807SJeff Garzik dev->cdb_len = 16; 2371c6fd2807SJeff Garzik } 2372c6fd2807SJeff Garzik 2373c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 2374c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 2375854c73a2STejun Heo const char *cdb_intr_string = ""; 2376854c73a2STejun Heo const char *atapi_an_string = ""; 237791163006STejun Heo const char *dma_dir_string = ""; 23787d77b247STejun Heo u32 sntf; 2379c6fd2807SJeff Garzik 2380c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 2381c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 2382c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2383c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 2384c6fd2807SJeff Garzik "unsupported CDB len\n"); 2385c6fd2807SJeff Garzik rc = -EINVAL; 2386c6fd2807SJeff Garzik goto err_out_nosup; 2387c6fd2807SJeff Garzik } 2388c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 2389c6fd2807SJeff Garzik 23907d77b247STejun Heo /* Enable ATAPI AN if both the host and device have 23917d77b247STejun Heo * the support. If PMP is attached, SNTF is required 23927d77b247STejun Heo * to enable ATAPI AN to discern between PHY status 23937d77b247STejun Heo * changed notifications and ATAPI ANs. 23949f45cbd3SKristen Carlson Accardi */ 23957d77b247STejun Heo if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 2396071f44b1STejun Heo (!sata_pmp_attached(ap) || 23977d77b247STejun Heo sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 2398854c73a2STejun Heo unsigned int err_mask; 2399854c73a2STejun Heo 24009f45cbd3SKristen Carlson Accardi /* issue SET feature command to turn this on */ 2401218f3d30SJeff Garzik err_mask = ata_dev_set_feature(dev, 2402218f3d30SJeff Garzik SETFEATURES_SATA_ENABLE, SATA_AN); 2403854c73a2STejun Heo if (err_mask) 24049f45cbd3SKristen Carlson Accardi ata_dev_printk(dev, KERN_ERR, 2405854c73a2STejun Heo "failed to enable ATAPI AN " 2406854c73a2STejun Heo "(err_mask=0x%x)\n", err_mask); 2407854c73a2STejun Heo else { 24089f45cbd3SKristen Carlson Accardi dev->flags |= ATA_DFLAG_AN; 2409854c73a2STejun Heo atapi_an_string = ", ATAPI AN"; 2410854c73a2STejun Heo } 24119f45cbd3SKristen Carlson Accardi } 24129f45cbd3SKristen Carlson Accardi 2413c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 2414c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 2415c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 2416c6fd2807SJeff Garzik } 2417c6fd2807SJeff Garzik 241891163006STejun Heo if (atapi_dmadir || atapi_id_dmadir(dev->id)) { 241991163006STejun Heo dev->flags |= ATA_DFLAG_DMADIR; 242091163006STejun Heo dma_dir_string = ", DMADIR"; 242191163006STejun Heo } 242291163006STejun Heo 2423c6fd2807SJeff Garzik /* print device info to dmesg */ 2424c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2425ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 242691163006STejun Heo "ATAPI: %s, %s, max %s%s%s%s\n", 2427ef143d57SAlbert Lee modelbuf, fwrevbuf, 2428c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 242991163006STejun Heo cdb_intr_string, atapi_an_string, 243091163006STejun Heo dma_dir_string); 2431c6fd2807SJeff Garzik } 2432c6fd2807SJeff Garzik 2433914ed354STejun Heo /* determine max_sectors */ 2434914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 2435914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 2436914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 2437914ed354STejun Heo 2438ca77329fSKristen Carlson Accardi if (!(dev->horkage & ATA_HORKAGE_IPM)) { 2439ca77329fSKristen Carlson Accardi if (ata_id_has_hipm(dev->id)) 2440ca77329fSKristen Carlson Accardi dev->flags |= ATA_DFLAG_HIPM; 2441ca77329fSKristen Carlson Accardi if (ata_id_has_dipm(dev->id)) 2442ca77329fSKristen Carlson Accardi dev->flags |= ATA_DFLAG_DIPM; 2443ca77329fSKristen Carlson Accardi } 2444ca77329fSKristen Carlson Accardi 2445c5038fc0SAlan Cox /* Limit PATA drive on SATA cable bridge transfers to udma5, 2446c5038fc0SAlan Cox 200 sectors */ 2447c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2448c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2449c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2450c6fd2807SJeff Garzik "applying bridge limits\n"); 2451c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2452c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2453c6fd2807SJeff Garzik } 2454c6fd2807SJeff Garzik 2455f8d8e579STony Battersby if ((dev->class == ATA_DEV_ATAPI) && 2456f442cd86SAlbert Lee (atapi_command_packet_set(id) == TYPE_TAPE)) { 2457f8d8e579STony Battersby dev->max_sectors = ATA_MAX_SECTORS_TAPE; 2458f442cd86SAlbert Lee dev->horkage |= ATA_HORKAGE_STUCK_ERR; 2459f442cd86SAlbert Lee } 2460f8d8e579STony Battersby 246175683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 246203ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 246303ec52deSTejun Heo dev->max_sectors); 246418d6e9d5SAlbert Lee 2465ca77329fSKristen Carlson Accardi if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { 2466ca77329fSKristen Carlson Accardi dev->horkage |= ATA_HORKAGE_IPM; 2467ca77329fSKristen Carlson Accardi 2468ca77329fSKristen Carlson Accardi /* reset link pm_policy for this port to no pm */ 2469ca77329fSKristen Carlson Accardi ap->pm_policy = MAX_PERFORMANCE; 2470ca77329fSKristen Carlson Accardi } 2471ca77329fSKristen Carlson Accardi 2472c6fd2807SJeff Garzik if (ap->ops->dev_config) 2473cd0d3bbcSAlan ap->ops->dev_config(dev); 2474c6fd2807SJeff Garzik 2475c5038fc0SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 2476c5038fc0SAlan Cox /* Let the user know. We don't want to disallow opens for 2477c5038fc0SAlan Cox rescue purposes, or in case the vendor is just a blithering 2478c5038fc0SAlan Cox idiot. Do this after the dev_config call as some controllers 2479c5038fc0SAlan Cox with buggy firmware may want to avoid reporting false device 2480c5038fc0SAlan Cox bugs */ 2481c5038fc0SAlan Cox 2482c5038fc0SAlan Cox if (print_info) { 2483c5038fc0SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2484c5038fc0SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 2485c5038fc0SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2486c5038fc0SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 2487c5038fc0SAlan Cox } 2488c5038fc0SAlan Cox } 2489c5038fc0SAlan Cox 2490c6fd2807SJeff Garzik return 0; 2491c6fd2807SJeff Garzik 2492c6fd2807SJeff Garzik err_out_nosup: 2493c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2494c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 24957f5e4e8dSHarvey Harrison "%s: EXIT, err\n", __func__); 2496c6fd2807SJeff Garzik return rc; 2497c6fd2807SJeff Garzik } 2498c6fd2807SJeff Garzik 2499c6fd2807SJeff Garzik /** 25002e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2501be0d18dfSAlan Cox * @ap: port 2502be0d18dfSAlan Cox * 25032e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2504be0d18dfSAlan Cox * detection. 2505be0d18dfSAlan Cox */ 2506be0d18dfSAlan Cox 2507be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2508be0d18dfSAlan Cox { 2509be0d18dfSAlan Cox return ATA_CBL_PATA40; 2510be0d18dfSAlan Cox } 2511be0d18dfSAlan Cox 2512be0d18dfSAlan Cox /** 25132e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2514be0d18dfSAlan Cox * @ap: port 2515be0d18dfSAlan Cox * 25162e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2517be0d18dfSAlan Cox * detection. 2518be0d18dfSAlan Cox */ 2519be0d18dfSAlan Cox 2520be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2521be0d18dfSAlan Cox { 2522be0d18dfSAlan Cox return ATA_CBL_PATA80; 2523be0d18dfSAlan Cox } 2524be0d18dfSAlan Cox 2525be0d18dfSAlan Cox /** 2526be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2527be0d18dfSAlan Cox * @ap: port 2528be0d18dfSAlan Cox * 2529be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2530be0d18dfSAlan Cox */ 2531be0d18dfSAlan Cox 2532be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2533be0d18dfSAlan Cox { 2534be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2535be0d18dfSAlan Cox } 2536be0d18dfSAlan Cox 2537be0d18dfSAlan Cox /** 2538c88f90c3STejun Heo * ata_cable_ignore - return ignored PATA cable. 2539c88f90c3STejun Heo * @ap: port 2540c88f90c3STejun Heo * 2541c88f90c3STejun Heo * Helper method for drivers which don't use cable type to limit 2542c88f90c3STejun Heo * transfer mode. 2543c88f90c3STejun Heo */ 2544c88f90c3STejun Heo int ata_cable_ignore(struct ata_port *ap) 2545c88f90c3STejun Heo { 2546c88f90c3STejun Heo return ATA_CBL_PATA_IGN; 2547c88f90c3STejun Heo } 2548c88f90c3STejun Heo 2549c88f90c3STejun Heo /** 2550be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2551be0d18dfSAlan Cox * @ap: port 2552be0d18dfSAlan Cox * 2553be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2554be0d18dfSAlan Cox */ 2555be0d18dfSAlan Cox 2556be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2557be0d18dfSAlan Cox { 2558be0d18dfSAlan Cox return ATA_CBL_SATA; 2559be0d18dfSAlan Cox } 2560be0d18dfSAlan Cox 2561be0d18dfSAlan Cox /** 2562c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2563c6fd2807SJeff Garzik * @ap: Bus to probe 2564c6fd2807SJeff Garzik * 2565c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2566c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2567c6fd2807SJeff Garzik * the bus. 2568c6fd2807SJeff Garzik * 2569c6fd2807SJeff Garzik * LOCKING: 2570c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2571c6fd2807SJeff Garzik * 2572c6fd2807SJeff Garzik * RETURNS: 2573c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2574c6fd2807SJeff Garzik */ 2575c6fd2807SJeff Garzik 2576c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2577c6fd2807SJeff Garzik { 2578c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2579c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 2580f58229f8STejun Heo int rc; 2581c6fd2807SJeff Garzik struct ata_device *dev; 2582c6fd2807SJeff Garzik 2583c6fd2807SJeff Garzik ata_port_probe(ap); 2584c6fd2807SJeff Garzik 2585f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2586f58229f8STejun Heo tries[dev->devno] = ATA_PROBE_MAX_TRIES; 2587c6fd2807SJeff Garzik 2588c6fd2807SJeff Garzik retry: 2589cdeab114STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2590cdeab114STejun Heo /* If we issue an SRST then an ATA drive (not ATAPI) 2591cdeab114STejun Heo * may change configuration and be in PIO0 timing. If 2592cdeab114STejun Heo * we do a hard reset (or are coming from power on) 2593cdeab114STejun Heo * this is true for ATA or ATAPI. Until we've set a 2594cdeab114STejun Heo * suitable controller mode we should not touch the 2595cdeab114STejun Heo * bus as we may be talking too fast. 2596cdeab114STejun Heo */ 2597cdeab114STejun Heo dev->pio_mode = XFER_PIO_0; 2598cdeab114STejun Heo 2599cdeab114STejun Heo /* If the controller has a pio mode setup function 2600cdeab114STejun Heo * then use it to set the chipset to rights. Don't 2601cdeab114STejun Heo * touch the DMA setup as that will be dealt with when 2602cdeab114STejun Heo * configuring devices. 2603cdeab114STejun Heo */ 2604cdeab114STejun Heo if (ap->ops->set_piomode) 2605cdeab114STejun Heo ap->ops->set_piomode(ap, dev); 2606cdeab114STejun Heo } 2607cdeab114STejun Heo 2608c6fd2807SJeff Garzik /* reset and determine device classes */ 2609c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2610c6fd2807SJeff Garzik 2611f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2612c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 2613c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 2614c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2615c6fd2807SJeff Garzik else 2616c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2617c6fd2807SJeff Garzik 2618c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2619c6fd2807SJeff Garzik } 2620c6fd2807SJeff Garzik 2621c6fd2807SJeff Garzik ata_port_probe(ap); 2622c6fd2807SJeff Garzik 2623f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2624f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2625f31f0cc2SJeff Garzik the slave device */ 2626f31f0cc2SJeff Garzik 2627a4ba7fe2SBartlomiej Zolnierkiewicz ata_link_for_each_dev_reverse(dev, &ap->link) { 2628f58229f8STejun Heo if (tries[dev->devno]) 2629f58229f8STejun Heo dev->class = classes[dev->devno]; 2630c6fd2807SJeff Garzik 2631c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2632c6fd2807SJeff Garzik continue; 2633c6fd2807SJeff Garzik 2634bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2635bff04647STejun Heo dev->id); 2636c6fd2807SJeff Garzik if (rc) 2637c6fd2807SJeff Garzik goto fail; 2638f31f0cc2SJeff Garzik } 2639f31f0cc2SJeff Garzik 2640be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2641be0d18dfSAlan Cox if (ap->ops->cable_detect) 2642be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2643be0d18dfSAlan Cox 2644614fe29bSAlan Cox /* We may have SATA bridge glue hiding here irrespective of the 2645614fe29bSAlan Cox reported cable types and sensed types */ 2646614fe29bSAlan Cox ata_link_for_each_dev(dev, &ap->link) { 2647614fe29bSAlan Cox if (!ata_dev_enabled(dev)) 2648614fe29bSAlan Cox continue; 2649614fe29bSAlan Cox /* SATA drives indicate we have a bridge. We don't know which 2650614fe29bSAlan Cox end of the link the bridge is which is a problem */ 2651614fe29bSAlan Cox if (ata_id_is_sata(dev->id)) 2652614fe29bSAlan Cox ap->cbl = ATA_CBL_SATA; 2653614fe29bSAlan Cox } 2654614fe29bSAlan Cox 2655f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2656f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2657f31f0cc2SJeff Garzik 2658f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2659f31f0cc2SJeff Garzik if (!ata_dev_enabled(dev)) 2660f31f0cc2SJeff Garzik continue; 2661c6fd2807SJeff Garzik 26629af5c9c9STejun Heo ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; 2663efdaedc4STejun Heo rc = ata_dev_configure(dev); 26649af5c9c9STejun Heo ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2665c6fd2807SJeff Garzik if (rc) 2666c6fd2807SJeff Garzik goto fail; 2667c6fd2807SJeff Garzik } 2668c6fd2807SJeff Garzik 2669c6fd2807SJeff Garzik /* configure transfer mode */ 26700260731fSTejun Heo rc = ata_set_mode(&ap->link, &dev); 26714ae72a1eSTejun Heo if (rc) 2672c6fd2807SJeff Garzik goto fail; 2673c6fd2807SJeff Garzik 2674f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2675f58229f8STejun Heo if (ata_dev_enabled(dev)) 2676c6fd2807SJeff Garzik return 0; 2677c6fd2807SJeff Garzik 2678c6fd2807SJeff Garzik /* no device present, disable port */ 2679c6fd2807SJeff Garzik ata_port_disable(ap); 2680c6fd2807SJeff Garzik return -ENODEV; 2681c6fd2807SJeff Garzik 2682c6fd2807SJeff Garzik fail: 26834ae72a1eSTejun Heo tries[dev->devno]--; 26844ae72a1eSTejun Heo 2685c6fd2807SJeff Garzik switch (rc) { 2686c6fd2807SJeff Garzik case -EINVAL: 26874ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2688c6fd2807SJeff Garzik tries[dev->devno] = 0; 2689c6fd2807SJeff Garzik break; 26904ae72a1eSTejun Heo 26914ae72a1eSTejun Heo case -ENODEV: 26924ae72a1eSTejun Heo /* give it just one more chance */ 26934ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2694c6fd2807SJeff Garzik case -EIO: 26954ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 26964ae72a1eSTejun Heo /* This is the last chance, better to slow 26974ae72a1eSTejun Heo * down than lose it. 26984ae72a1eSTejun Heo */ 2699936fd732STejun Heo sata_down_spd_limit(&ap->link); 27004ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 27014ae72a1eSTejun Heo } 2702c6fd2807SJeff Garzik } 2703c6fd2807SJeff Garzik 27044ae72a1eSTejun Heo if (!tries[dev->devno]) 2705c6fd2807SJeff Garzik ata_dev_disable(dev); 2706c6fd2807SJeff Garzik 2707c6fd2807SJeff Garzik goto retry; 2708c6fd2807SJeff Garzik } 2709c6fd2807SJeff Garzik 2710c6fd2807SJeff Garzik /** 2711c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 2712c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 2713c6fd2807SJeff Garzik * 2714c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2715c6fd2807SJeff Garzik * thinks that the entire port is enabled. 2716c6fd2807SJeff Garzik * 2717cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2718c6fd2807SJeff Garzik * serialization. 2719c6fd2807SJeff Garzik */ 2720c6fd2807SJeff Garzik 2721c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 2722c6fd2807SJeff Garzik { 2723c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 2724c6fd2807SJeff Garzik } 2725c6fd2807SJeff Garzik 2726c6fd2807SJeff Garzik /** 2727c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2728936fd732STejun Heo * @link: SATA link to printk link status about 2729c6fd2807SJeff Garzik * 2730c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2731c6fd2807SJeff Garzik * 2732c6fd2807SJeff Garzik * LOCKING: 2733c6fd2807SJeff Garzik * None. 2734c6fd2807SJeff Garzik */ 27356bdb4fc9SAdrian Bunk static void sata_print_link_status(struct ata_link *link) 2736c6fd2807SJeff Garzik { 2737c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2738c6fd2807SJeff Garzik 2739936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus)) 2740c6fd2807SJeff Garzik return; 2741936fd732STejun Heo sata_scr_read(link, SCR_CONTROL, &scontrol); 2742c6fd2807SJeff Garzik 2743b1c72916STejun Heo if (ata_phys_link_online(link)) { 2744c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2745936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2746c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2747c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2748c6fd2807SJeff Garzik } else { 2749936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2750c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2751c6fd2807SJeff Garzik sstatus, scontrol); 2752c6fd2807SJeff Garzik } 2753c6fd2807SJeff Garzik } 2754c6fd2807SJeff Garzik 2755c6fd2807SJeff Garzik /** 2756c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2757c6fd2807SJeff Garzik * @adev: device 2758c6fd2807SJeff Garzik * 2759c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2760c6fd2807SJeff Garzik * present NULL is returned 2761c6fd2807SJeff Garzik */ 2762c6fd2807SJeff Garzik 2763c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2764c6fd2807SJeff Garzik { 27659af5c9c9STejun Heo struct ata_link *link = adev->link; 27669af5c9c9STejun Heo struct ata_device *pair = &link->device[1 - adev->devno]; 2767c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2768c6fd2807SJeff Garzik return NULL; 2769c6fd2807SJeff Garzik return pair; 2770c6fd2807SJeff Garzik } 2771c6fd2807SJeff Garzik 2772c6fd2807SJeff Garzik /** 2773c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2774c6fd2807SJeff Garzik * @ap: Port to be disabled. 2775c6fd2807SJeff Garzik * 2776c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2777c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2778c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2779c6fd2807SJeff Garzik * on this port. 2780c6fd2807SJeff Garzik * 2781cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2782c6fd2807SJeff Garzik * serialization. 2783c6fd2807SJeff Garzik */ 2784c6fd2807SJeff Garzik 2785c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2786c6fd2807SJeff Garzik { 27879af5c9c9STejun Heo ap->link.device[0].class = ATA_DEV_NONE; 27889af5c9c9STejun Heo ap->link.device[1].class = ATA_DEV_NONE; 2789c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2790c6fd2807SJeff Garzik } 2791c6fd2807SJeff Garzik 2792c6fd2807SJeff Garzik /** 2793c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2794936fd732STejun Heo * @link: Link to adjust SATA spd limit for 2795c6fd2807SJeff Garzik * 2796936fd732STejun Heo * Adjust SATA spd limit of @link downward. Note that this 2797c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2798c6fd2807SJeff Garzik * using sata_set_spd(). 2799c6fd2807SJeff Garzik * 2800c6fd2807SJeff Garzik * LOCKING: 2801c6fd2807SJeff Garzik * Inherited from caller. 2802c6fd2807SJeff Garzik * 2803c6fd2807SJeff Garzik * RETURNS: 2804c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2805c6fd2807SJeff Garzik */ 2806936fd732STejun Heo int sata_down_spd_limit(struct ata_link *link) 2807c6fd2807SJeff Garzik { 2808c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2809c6fd2807SJeff Garzik int rc, highbit; 2810c6fd2807SJeff Garzik 2811936fd732STejun Heo if (!sata_scr_valid(link)) 2812008a7896STejun Heo return -EOPNOTSUPP; 2813008a7896STejun Heo 2814008a7896STejun Heo /* If SCR can be read, use it to determine the current SPD. 2815936fd732STejun Heo * If not, use cached value in link->sata_spd. 2816008a7896STejun Heo */ 2817936fd732STejun Heo rc = sata_scr_read(link, SCR_STATUS, &sstatus); 2818008a7896STejun Heo if (rc == 0) 2819008a7896STejun Heo spd = (sstatus >> 4) & 0xf; 2820008a7896STejun Heo else 2821936fd732STejun Heo spd = link->sata_spd; 2822c6fd2807SJeff Garzik 2823936fd732STejun Heo mask = link->sata_spd_limit; 2824c6fd2807SJeff Garzik if (mask <= 1) 2825c6fd2807SJeff Garzik return -EINVAL; 2826008a7896STejun Heo 2827008a7896STejun Heo /* unconditionally mask off the highest bit */ 2828c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2829c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2830c6fd2807SJeff Garzik 2831008a7896STejun Heo /* Mask off all speeds higher than or equal to the current 2832008a7896STejun Heo * one. Force 1.5Gbps if current SPD is not available. 2833008a7896STejun Heo */ 2834008a7896STejun Heo if (spd > 1) 2835008a7896STejun Heo mask &= (1 << (spd - 1)) - 1; 2836008a7896STejun Heo else 2837008a7896STejun Heo mask &= 1; 2838008a7896STejun Heo 2839008a7896STejun Heo /* were we already at the bottom? */ 2840c6fd2807SJeff Garzik if (!mask) 2841c6fd2807SJeff Garzik return -EINVAL; 2842c6fd2807SJeff Garzik 2843936fd732STejun Heo link->sata_spd_limit = mask; 2844c6fd2807SJeff Garzik 2845936fd732STejun Heo ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", 2846c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2847c6fd2807SJeff Garzik 2848c6fd2807SJeff Garzik return 0; 2849c6fd2807SJeff Garzik } 2850c6fd2807SJeff Garzik 2851936fd732STejun Heo static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) 2852c6fd2807SJeff Garzik { 28535270222fSTejun Heo struct ata_link *host_link = &link->ap->link; 28545270222fSTejun Heo u32 limit, target, spd; 2855c6fd2807SJeff Garzik 28565270222fSTejun Heo limit = link->sata_spd_limit; 28575270222fSTejun Heo 28585270222fSTejun Heo /* Don't configure downstream link faster than upstream link. 28595270222fSTejun Heo * It doesn't speed up anything and some PMPs choke on such 28605270222fSTejun Heo * configuration. 28615270222fSTejun Heo */ 28625270222fSTejun Heo if (!ata_is_host_link(link) && host_link->sata_spd) 28635270222fSTejun Heo limit &= (1 << host_link->sata_spd) - 1; 28645270222fSTejun Heo 28655270222fSTejun Heo if (limit == UINT_MAX) 28665270222fSTejun Heo target = 0; 2867c6fd2807SJeff Garzik else 28685270222fSTejun Heo target = fls(limit); 2869c6fd2807SJeff Garzik 2870c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 28715270222fSTejun Heo *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); 2872c6fd2807SJeff Garzik 28735270222fSTejun Heo return spd != target; 2874c6fd2807SJeff Garzik } 2875c6fd2807SJeff Garzik 2876c6fd2807SJeff Garzik /** 2877c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2878936fd732STejun Heo * @link: Link in question 2879c6fd2807SJeff Garzik * 2880c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2881936fd732STejun Heo * @link->sata_spd_limit. This function is used to determine 2882c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2883c6fd2807SJeff Garzik * configuration. 2884c6fd2807SJeff Garzik * 2885c6fd2807SJeff Garzik * LOCKING: 2886c6fd2807SJeff Garzik * Inherited from caller. 2887c6fd2807SJeff Garzik * 2888c6fd2807SJeff Garzik * RETURNS: 2889c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2890c6fd2807SJeff Garzik */ 28911dc55e87SAdrian Bunk static int sata_set_spd_needed(struct ata_link *link) 2892c6fd2807SJeff Garzik { 2893c6fd2807SJeff Garzik u32 scontrol; 2894c6fd2807SJeff Garzik 2895936fd732STejun Heo if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 2896db64bcf3STejun Heo return 1; 2897c6fd2807SJeff Garzik 2898936fd732STejun Heo return __sata_set_spd_needed(link, &scontrol); 2899c6fd2807SJeff Garzik } 2900c6fd2807SJeff Garzik 2901c6fd2807SJeff Garzik /** 2902c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2903936fd732STejun Heo * @link: Link to set SATA spd for 2904c6fd2807SJeff Garzik * 2905936fd732STejun Heo * Set SATA spd of @link according to sata_spd_limit. 2906c6fd2807SJeff Garzik * 2907c6fd2807SJeff Garzik * LOCKING: 2908c6fd2807SJeff Garzik * Inherited from caller. 2909c6fd2807SJeff Garzik * 2910c6fd2807SJeff Garzik * RETURNS: 2911c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2912c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2913c6fd2807SJeff Garzik */ 2914936fd732STejun Heo int sata_set_spd(struct ata_link *link) 2915c6fd2807SJeff Garzik { 2916c6fd2807SJeff Garzik u32 scontrol; 2917c6fd2807SJeff Garzik int rc; 2918c6fd2807SJeff Garzik 2919936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 2920c6fd2807SJeff Garzik return rc; 2921c6fd2807SJeff Garzik 2922936fd732STejun Heo if (!__sata_set_spd_needed(link, &scontrol)) 2923c6fd2807SJeff Garzik return 0; 2924c6fd2807SJeff Garzik 2925936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 2926c6fd2807SJeff Garzik return rc; 2927c6fd2807SJeff Garzik 2928c6fd2807SJeff Garzik return 1; 2929c6fd2807SJeff Garzik } 2930c6fd2807SJeff Garzik 2931c6fd2807SJeff Garzik /* 2932c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2933c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2934c6fd2807SJeff Garzik */ 2935c6fd2807SJeff Garzik /* 2936b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2937c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2938b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2939b352e57dSAlan Cox * 2940b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2941c6fd2807SJeff Garzik */ 2942c6fd2807SJeff Garzik 2943c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 294470cd071eSTejun Heo /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 294570cd071eSTejun Heo { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 294670cd071eSTejun Heo { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 294770cd071eSTejun Heo { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 294870cd071eSTejun Heo { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 294970cd071eSTejun Heo { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 295070cd071eSTejun Heo { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 295170cd071eSTejun Heo { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2952c6fd2807SJeff Garzik 295370cd071eSTejun Heo { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 295470cd071eSTejun Heo { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 295570cd071eSTejun Heo { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2956c6fd2807SJeff Garzik 295770cd071eSTejun Heo { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 295870cd071eSTejun Heo { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 295970cd071eSTejun Heo { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2960b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 296170cd071eSTejun Heo { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2962c6fd2807SJeff Garzik 2963c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 296470cd071eSTejun Heo { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 296570cd071eSTejun Heo { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 296670cd071eSTejun Heo { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 296770cd071eSTejun Heo { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 296870cd071eSTejun Heo { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 296970cd071eSTejun Heo { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 297070cd071eSTejun Heo { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2971c6fd2807SJeff Garzik 2972c6fd2807SJeff Garzik { 0xFF } 2973c6fd2807SJeff Garzik }; 2974c6fd2807SJeff Garzik 2975c6fd2807SJeff Garzik #define ENOUGH(v, unit) (((v)-1)/(unit)+1) 2976c6fd2807SJeff Garzik #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) 2977c6fd2807SJeff Garzik 2978c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2979c6fd2807SJeff Garzik { 2980c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2981c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2982c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2983c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2984c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2985c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2986c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2987c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2988c6fd2807SJeff Garzik } 2989c6fd2807SJeff Garzik 2990c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2991c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2992c6fd2807SJeff Garzik { 2993c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2994c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2995c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2996c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2997c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2998c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2999c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 3000c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 3001c6fd2807SJeff Garzik } 3002c6fd2807SJeff Garzik 30036357357cSTejun Heo const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) 3004c6fd2807SJeff Garzik { 300570cd071eSTejun Heo const struct ata_timing *t = ata_timing; 3006c6fd2807SJeff Garzik 300770cd071eSTejun Heo while (xfer_mode > t->mode) 300870cd071eSTejun Heo t++; 300970cd071eSTejun Heo 301070cd071eSTejun Heo if (xfer_mode == t->mode) 3011c6fd2807SJeff Garzik return t; 301270cd071eSTejun Heo return NULL; 3013c6fd2807SJeff Garzik } 3014c6fd2807SJeff Garzik 3015c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 3016c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 3017c6fd2807SJeff Garzik { 3018c6fd2807SJeff Garzik const struct ata_timing *s; 3019c6fd2807SJeff Garzik struct ata_timing p; 3020c6fd2807SJeff Garzik 3021c6fd2807SJeff Garzik /* 3022c6fd2807SJeff Garzik * Find the mode. 3023c6fd2807SJeff Garzik */ 3024c6fd2807SJeff Garzik 3025c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 3026c6fd2807SJeff Garzik return -EINVAL; 3027c6fd2807SJeff Garzik 3028c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 3029c6fd2807SJeff Garzik 3030c6fd2807SJeff Garzik /* 3031c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 3032c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 3033c6fd2807SJeff Garzik */ 3034c6fd2807SJeff Garzik 3035c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 3036c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 3037c6fd2807SJeff Garzik if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 3038c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 3039c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 3040c6fd2807SJeff Garzik } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 3041c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 3042c6fd2807SJeff Garzik } 3043c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 3044c6fd2807SJeff Garzik } 3045c6fd2807SJeff Garzik 3046c6fd2807SJeff Garzik /* 3047c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 3048c6fd2807SJeff Garzik */ 3049c6fd2807SJeff Garzik 3050c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 3051c6fd2807SJeff Garzik 3052c6fd2807SJeff Garzik /* 3053c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 3054c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 3055c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 3056c6fd2807SJeff Garzik */ 3057c6fd2807SJeff Garzik 3058fd3367afSAlan if (speed > XFER_PIO_6) { 3059c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 3060c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 3061c6fd2807SJeff Garzik } 3062c6fd2807SJeff Garzik 3063c6fd2807SJeff Garzik /* 3064c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 3065c6fd2807SJeff Garzik */ 3066c6fd2807SJeff Garzik 3067c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 3068c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 3069c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 3070c6fd2807SJeff Garzik } 3071c6fd2807SJeff Garzik 3072c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 3073c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 3074c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 3075c6fd2807SJeff Garzik } 30764f701d1eSAlan Cox 30774f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 30784f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 30794f701d1eSAlan Cox if so we must correct this */ 30804f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 30814f701d1eSAlan Cox t->cycle = t->active + t->recover; 3082c6fd2807SJeff Garzik 3083c6fd2807SJeff Garzik return 0; 3084c6fd2807SJeff Garzik } 3085c6fd2807SJeff Garzik 3086c6fd2807SJeff Garzik /** 3087a0f79b92STejun Heo * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3088a0f79b92STejun Heo * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3089a0f79b92STejun Heo * @cycle: cycle duration in ns 3090a0f79b92STejun Heo * 3091a0f79b92STejun Heo * Return matching xfer mode for @cycle. The returned mode is of 3092a0f79b92STejun Heo * the transfer type specified by @xfer_shift. If @cycle is too 3093a0f79b92STejun Heo * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3094a0f79b92STejun Heo * than the fastest known mode, the fasted mode is returned. 3095a0f79b92STejun Heo * 3096a0f79b92STejun Heo * LOCKING: 3097a0f79b92STejun Heo * None. 3098a0f79b92STejun Heo * 3099a0f79b92STejun Heo * RETURNS: 3100a0f79b92STejun Heo * Matching xfer_mode, 0xff if no match found. 3101a0f79b92STejun Heo */ 3102a0f79b92STejun Heo u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3103a0f79b92STejun Heo { 3104a0f79b92STejun Heo u8 base_mode = 0xff, last_mode = 0xff; 3105a0f79b92STejun Heo const struct ata_xfer_ent *ent; 3106a0f79b92STejun Heo const struct ata_timing *t; 3107a0f79b92STejun Heo 3108a0f79b92STejun Heo for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3109a0f79b92STejun Heo if (ent->shift == xfer_shift) 3110a0f79b92STejun Heo base_mode = ent->base; 3111a0f79b92STejun Heo 3112a0f79b92STejun Heo for (t = ata_timing_find_mode(base_mode); 3113a0f79b92STejun Heo t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3114a0f79b92STejun Heo unsigned short this_cycle; 3115a0f79b92STejun Heo 3116a0f79b92STejun Heo switch (xfer_shift) { 3117a0f79b92STejun Heo case ATA_SHIFT_PIO: 3118a0f79b92STejun Heo case ATA_SHIFT_MWDMA: 3119a0f79b92STejun Heo this_cycle = t->cycle; 3120a0f79b92STejun Heo break; 3121a0f79b92STejun Heo case ATA_SHIFT_UDMA: 3122a0f79b92STejun Heo this_cycle = t->udma; 3123a0f79b92STejun Heo break; 3124a0f79b92STejun Heo default: 3125a0f79b92STejun Heo return 0xff; 3126a0f79b92STejun Heo } 3127a0f79b92STejun Heo 3128a0f79b92STejun Heo if (cycle > this_cycle) 3129a0f79b92STejun Heo break; 3130a0f79b92STejun Heo 3131a0f79b92STejun Heo last_mode = t->mode; 3132a0f79b92STejun Heo } 3133a0f79b92STejun Heo 3134a0f79b92STejun Heo return last_mode; 3135a0f79b92STejun Heo } 3136a0f79b92STejun Heo 3137a0f79b92STejun Heo /** 3138c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 3139c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 3140458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 3141c6fd2807SJeff Garzik * 3142c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 3143c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 3144c6fd2807SJeff Garzik * will apply the limit. 3145c6fd2807SJeff Garzik * 3146c6fd2807SJeff Garzik * LOCKING: 3147c6fd2807SJeff Garzik * Inherited from caller. 3148c6fd2807SJeff Garzik * 3149c6fd2807SJeff Garzik * RETURNS: 3150c6fd2807SJeff Garzik * 0 on success, negative errno on failure 3151c6fd2807SJeff Garzik */ 3152458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3153c6fd2807SJeff Garzik { 3154458337dbSTejun Heo char buf[32]; 31557dc951aeSTejun Heo unsigned long orig_mask, xfer_mask; 31567dc951aeSTejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 3157458337dbSTejun Heo int quiet, highbit; 3158c6fd2807SJeff Garzik 3159458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 3160458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 3161458337dbSTejun Heo 3162458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3163458337dbSTejun Heo dev->mwdma_mask, 3164c6fd2807SJeff Garzik dev->udma_mask); 3165458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3166c6fd2807SJeff Garzik 3167458337dbSTejun Heo switch (sel) { 3168458337dbSTejun Heo case ATA_DNXFER_PIO: 3169458337dbSTejun Heo highbit = fls(pio_mask) - 1; 3170458337dbSTejun Heo pio_mask &= ~(1 << highbit); 3171458337dbSTejun Heo break; 3172458337dbSTejun Heo 3173458337dbSTejun Heo case ATA_DNXFER_DMA: 3174458337dbSTejun Heo if (udma_mask) { 3175458337dbSTejun Heo highbit = fls(udma_mask) - 1; 3176458337dbSTejun Heo udma_mask &= ~(1 << highbit); 3177458337dbSTejun Heo if (!udma_mask) 3178458337dbSTejun Heo return -ENOENT; 3179458337dbSTejun Heo } else if (mwdma_mask) { 3180458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 3181458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 3182458337dbSTejun Heo if (!mwdma_mask) 3183458337dbSTejun Heo return -ENOENT; 3184458337dbSTejun Heo } 3185458337dbSTejun Heo break; 3186458337dbSTejun Heo 3187458337dbSTejun Heo case ATA_DNXFER_40C: 3188458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 3189458337dbSTejun Heo break; 3190458337dbSTejun Heo 3191458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 3192458337dbSTejun Heo pio_mask &= 1; 3193458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 3194458337dbSTejun Heo mwdma_mask = 0; 3195458337dbSTejun Heo udma_mask = 0; 3196458337dbSTejun Heo break; 3197458337dbSTejun Heo 3198458337dbSTejun Heo default: 3199458337dbSTejun Heo BUG(); 3200458337dbSTejun Heo } 3201458337dbSTejun Heo 3202458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3203458337dbSTejun Heo 3204458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3205458337dbSTejun Heo return -ENOENT; 3206458337dbSTejun Heo 3207458337dbSTejun Heo if (!quiet) { 3208458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3209458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 3210458337dbSTejun Heo ata_mode_string(xfer_mask), 3211458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3212458337dbSTejun Heo else 3213458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 3214458337dbSTejun Heo ata_mode_string(xfer_mask)); 3215458337dbSTejun Heo 3216458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 3217458337dbSTejun Heo "limiting speed to %s\n", buf); 3218458337dbSTejun Heo } 3219c6fd2807SJeff Garzik 3220c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3221c6fd2807SJeff Garzik &dev->udma_mask); 3222c6fd2807SJeff Garzik 3223c6fd2807SJeff Garzik return 0; 3224c6fd2807SJeff Garzik } 3225c6fd2807SJeff Garzik 3226c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 3227c6fd2807SJeff Garzik { 32289af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 32294055dee7STejun Heo const char *dev_err_whine = ""; 32304055dee7STejun Heo int ign_dev_err = 0; 3231c6fd2807SJeff Garzik unsigned int err_mask; 3232c6fd2807SJeff Garzik int rc; 3233c6fd2807SJeff Garzik 3234c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 3235c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 3236c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 3237c6fd2807SJeff Garzik 3238c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 32392dcb407eSJeff Garzik 32404055dee7STejun Heo if (err_mask & ~AC_ERR_DEV) 32414055dee7STejun Heo goto fail; 32422dcb407eSJeff Garzik 32434055dee7STejun Heo /* revalidate */ 3244baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 3245422c9daaSTejun Heo rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3246baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3247c6fd2807SJeff Garzik if (rc) 3248c6fd2807SJeff Garzik return rc; 3249c6fd2807SJeff Garzik 3250b93fda12SAlan Cox if (dev->xfer_shift == ATA_SHIFT_PIO) { 32514055dee7STejun Heo /* Old CFA may refuse this command, which is just fine */ 3252b93fda12SAlan Cox if (ata_id_is_cfa(dev->id)) 32534055dee7STejun Heo ign_dev_err = 1; 3254b93fda12SAlan Cox /* Catch several broken garbage emulations plus some pre 3255b93fda12SAlan Cox ATA devices */ 3256b93fda12SAlan Cox if (ata_id_major_version(dev->id) == 0 && 32574055dee7STejun Heo dev->pio_mode <= XFER_PIO_2) 32584055dee7STejun Heo ign_dev_err = 1; 3259b93fda12SAlan Cox /* Some very old devices and some bad newer ones fail 3260b93fda12SAlan Cox any kind of SET_XFERMODE request but support PIO0-2 3261b93fda12SAlan Cox timings and no IORDY */ 3262b93fda12SAlan Cox if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3263b93fda12SAlan Cox ign_dev_err = 1; 3264b93fda12SAlan Cox } 32654055dee7STejun Heo /* Early MWDMA devices do DMA but don't allow DMA mode setting. 32664055dee7STejun Heo Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 32674055dee7STejun Heo if (dev->xfer_shift == ATA_SHIFT_MWDMA && 32684055dee7STejun Heo dev->dma_mode == XFER_MW_DMA_0 && 32694055dee7STejun Heo (dev->id[63] >> 8) & 1) 32704055dee7STejun Heo ign_dev_err = 1; 32714055dee7STejun Heo 32724055dee7STejun Heo /* if the device is actually configured correctly, ignore dev err */ 32734055dee7STejun Heo if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 32744055dee7STejun Heo ign_dev_err = 1; 32754055dee7STejun Heo 32764055dee7STejun Heo if (err_mask & AC_ERR_DEV) { 32774055dee7STejun Heo if (!ign_dev_err) 32784055dee7STejun Heo goto fail; 32794055dee7STejun Heo else 32804055dee7STejun Heo dev_err_whine = " (device error ignored)"; 32814055dee7STejun Heo } 32824055dee7STejun Heo 3283c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 3284c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 3285c6fd2807SJeff Garzik 32864055dee7STejun Heo ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", 32874055dee7STejun Heo ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 32884055dee7STejun Heo dev_err_whine); 32894055dee7STejun Heo 3290c6fd2807SJeff Garzik return 0; 32914055dee7STejun Heo 32924055dee7STejun Heo fail: 32934055dee7STejun Heo ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 32944055dee7STejun Heo "(err_mask=0x%x)\n", err_mask); 32954055dee7STejun Heo return -EIO; 3296c6fd2807SJeff Garzik } 3297c6fd2807SJeff Garzik 3298c6fd2807SJeff Garzik /** 329904351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 33000260731fSTejun Heo * @link: link on which timings will be programmed 33011967b7ffSJoe Perches * @r_failed_dev: out parameter for failed device 3302c6fd2807SJeff Garzik * 330304351821SAlan * Standard implementation of the function used to tune and set 330404351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 330504351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 3306c6fd2807SJeff Garzik * returned in @r_failed_dev. 3307c6fd2807SJeff Garzik * 3308c6fd2807SJeff Garzik * LOCKING: 3309c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3310c6fd2807SJeff Garzik * 3311c6fd2807SJeff Garzik * RETURNS: 3312c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3313c6fd2807SJeff Garzik */ 331404351821SAlan 33150260731fSTejun Heo int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3316c6fd2807SJeff Garzik { 33170260731fSTejun Heo struct ata_port *ap = link->ap; 3318c6fd2807SJeff Garzik struct ata_device *dev; 3319f58229f8STejun Heo int rc = 0, used_dma = 0, found = 0; 3320c6fd2807SJeff Garzik 3321c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 3322f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 33237dc951aeSTejun Heo unsigned long pio_mask, dma_mask; 3324b3a70601SAlan Cox unsigned int mode_mask; 3325c6fd2807SJeff Garzik 3326c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 3327c6fd2807SJeff Garzik continue; 3328c6fd2807SJeff Garzik 3329b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATA; 3330b3a70601SAlan Cox if (dev->class == ATA_DEV_ATAPI) 3331b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATAPI; 3332b3a70601SAlan Cox else if (ata_id_is_cfa(dev->id)) 3333b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_CFA; 3334b3a70601SAlan Cox 3335c6fd2807SJeff Garzik ata_dev_xfermask(dev); 333633267325STejun Heo ata_force_xfermask(dev); 3337c6fd2807SJeff Garzik 3338c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3339c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 3340b3a70601SAlan Cox 3341b3a70601SAlan Cox if (libata_dma_mask & mode_mask) 3342b3a70601SAlan Cox dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 3343b3a70601SAlan Cox else 3344b3a70601SAlan Cox dma_mask = 0; 3345b3a70601SAlan Cox 3346c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3347c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3348c6fd2807SJeff Garzik 3349c6fd2807SJeff Garzik found = 1; 3350b15b3ebaSAlan Cox if (ata_dma_enabled(dev)) 3351c6fd2807SJeff Garzik used_dma = 1; 3352c6fd2807SJeff Garzik } 3353c6fd2807SJeff Garzik if (!found) 3354c6fd2807SJeff Garzik goto out; 3355c6fd2807SJeff Garzik 3356c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 3357f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 3358c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 3359c6fd2807SJeff Garzik continue; 3360c6fd2807SJeff Garzik 336170cd071eSTejun Heo if (dev->pio_mode == 0xff) { 3362c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 3363c6fd2807SJeff Garzik rc = -EINVAL; 3364c6fd2807SJeff Garzik goto out; 3365c6fd2807SJeff Garzik } 3366c6fd2807SJeff Garzik 3367c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 3368c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 3369c6fd2807SJeff Garzik if (ap->ops->set_piomode) 3370c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 3371c6fd2807SJeff Garzik } 3372c6fd2807SJeff Garzik 3373c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 3374f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 3375b15b3ebaSAlan Cox if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev)) 3376c6fd2807SJeff Garzik continue; 3377c6fd2807SJeff Garzik 3378c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 3379c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3380c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 3381c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 3382c6fd2807SJeff Garzik } 3383c6fd2807SJeff Garzik 3384c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 3385f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 338618d90debSAlan /* don't update suspended devices' xfer mode */ 33879666f400STejun Heo if (!ata_dev_enabled(dev)) 3388c6fd2807SJeff Garzik continue; 3389c6fd2807SJeff Garzik 3390c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 3391c6fd2807SJeff Garzik if (rc) 3392c6fd2807SJeff Garzik goto out; 3393c6fd2807SJeff Garzik } 3394c6fd2807SJeff Garzik 3395c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 3396c6fd2807SJeff Garzik * host channels are not permitted to do so. 3397c6fd2807SJeff Garzik */ 3398cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3399032af1ceSAlan ap->host->simplex_claimed = ap; 3400c6fd2807SJeff Garzik 3401c6fd2807SJeff Garzik out: 3402c6fd2807SJeff Garzik if (rc) 3403c6fd2807SJeff Garzik *r_failed_dev = dev; 3404c6fd2807SJeff Garzik return rc; 3405c6fd2807SJeff Garzik } 3406c6fd2807SJeff Garzik 3407c6fd2807SJeff Garzik /** 3408aa2731adSTejun Heo * ata_wait_ready - wait for link to become ready 3409aa2731adSTejun Heo * @link: link to be waited on 3410aa2731adSTejun Heo * @deadline: deadline jiffies for the operation 3411aa2731adSTejun Heo * @check_ready: callback to check link readiness 3412aa2731adSTejun Heo * 3413aa2731adSTejun Heo * Wait for @link to become ready. @check_ready should return 3414aa2731adSTejun Heo * positive number if @link is ready, 0 if it isn't, -ENODEV if 3415aa2731adSTejun Heo * link doesn't seem to be occupied, other errno for other error 3416aa2731adSTejun Heo * conditions. 3417aa2731adSTejun Heo * 3418aa2731adSTejun Heo * Transient -ENODEV conditions are allowed for 3419aa2731adSTejun Heo * ATA_TMOUT_FF_WAIT. 3420aa2731adSTejun Heo * 3421aa2731adSTejun Heo * LOCKING: 3422aa2731adSTejun Heo * EH context. 3423aa2731adSTejun Heo * 3424aa2731adSTejun Heo * RETURNS: 3425aa2731adSTejun Heo * 0 if @linke is ready before @deadline; otherwise, -errno. 3426aa2731adSTejun Heo */ 3427aa2731adSTejun Heo int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3428aa2731adSTejun Heo int (*check_ready)(struct ata_link *link)) 3429aa2731adSTejun Heo { 3430aa2731adSTejun Heo unsigned long start = jiffies; 3431341c2c95STejun Heo unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3432aa2731adSTejun Heo int warned = 0; 3433aa2731adSTejun Heo 3434b1c72916STejun Heo /* Slave readiness can't be tested separately from master. On 3435b1c72916STejun Heo * M/S emulation configuration, this function should be called 3436b1c72916STejun Heo * only on the master and it will handle both master and slave. 3437b1c72916STejun Heo */ 3438b1c72916STejun Heo WARN_ON(link == link->ap->slave_link); 3439b1c72916STejun Heo 3440aa2731adSTejun Heo if (time_after(nodev_deadline, deadline)) 3441aa2731adSTejun Heo nodev_deadline = deadline; 3442aa2731adSTejun Heo 3443aa2731adSTejun Heo while (1) { 3444aa2731adSTejun Heo unsigned long now = jiffies; 3445aa2731adSTejun Heo int ready, tmp; 3446aa2731adSTejun Heo 3447aa2731adSTejun Heo ready = tmp = check_ready(link); 3448aa2731adSTejun Heo if (ready > 0) 3449aa2731adSTejun Heo return 0; 3450aa2731adSTejun Heo 3451aa2731adSTejun Heo /* -ENODEV could be transient. Ignore -ENODEV if link 3452aa2731adSTejun Heo * is online. Also, some SATA devices take a long 3453aa2731adSTejun Heo * time to clear 0xff after reset. For example, 3454aa2731adSTejun Heo * HHD424020F7SV00 iVDR needs >= 800ms while Quantum 3455aa2731adSTejun Heo * GoVault needs even more than that. Wait for 3456aa2731adSTejun Heo * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline. 3457aa2731adSTejun Heo * 3458aa2731adSTejun Heo * Note that some PATA controllers (pata_ali) explode 3459aa2731adSTejun Heo * if status register is read more than once when 3460aa2731adSTejun Heo * there's no device attached. 3461aa2731adSTejun Heo */ 3462aa2731adSTejun Heo if (ready == -ENODEV) { 3463aa2731adSTejun Heo if (ata_link_online(link)) 3464aa2731adSTejun Heo ready = 0; 3465aa2731adSTejun Heo else if ((link->ap->flags & ATA_FLAG_SATA) && 3466aa2731adSTejun Heo !ata_link_offline(link) && 3467aa2731adSTejun Heo time_before(now, nodev_deadline)) 3468aa2731adSTejun Heo ready = 0; 3469aa2731adSTejun Heo } 3470aa2731adSTejun Heo 3471aa2731adSTejun Heo if (ready) 3472aa2731adSTejun Heo return ready; 3473aa2731adSTejun Heo if (time_after(now, deadline)) 3474aa2731adSTejun Heo return -EBUSY; 3475aa2731adSTejun Heo 3476aa2731adSTejun Heo if (!warned && time_after(now, start + 5 * HZ) && 3477aa2731adSTejun Heo (deadline - now > 3 * HZ)) { 3478aa2731adSTejun Heo ata_link_printk(link, KERN_WARNING, 3479aa2731adSTejun Heo "link is slow to respond, please be patient " 3480aa2731adSTejun Heo "(ready=%d)\n", tmp); 3481aa2731adSTejun Heo warned = 1; 3482aa2731adSTejun Heo } 3483aa2731adSTejun Heo 3484aa2731adSTejun Heo msleep(50); 3485aa2731adSTejun Heo } 3486aa2731adSTejun Heo } 3487aa2731adSTejun Heo 3488aa2731adSTejun Heo /** 3489aa2731adSTejun Heo * ata_wait_after_reset - wait for link to become ready after reset 3490aa2731adSTejun Heo * @link: link to be waited on 3491aa2731adSTejun Heo * @deadline: deadline jiffies for the operation 3492aa2731adSTejun Heo * @check_ready: callback to check link readiness 3493aa2731adSTejun Heo * 3494aa2731adSTejun Heo * Wait for @link to become ready after reset. 3495aa2731adSTejun Heo * 3496aa2731adSTejun Heo * LOCKING: 3497aa2731adSTejun Heo * EH context. 3498aa2731adSTejun Heo * 3499aa2731adSTejun Heo * RETURNS: 3500aa2731adSTejun Heo * 0 if @linke is ready before @deadline; otherwise, -errno. 3501aa2731adSTejun Heo */ 35022b4221bbSHarvey Harrison int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3503aa2731adSTejun Heo int (*check_ready)(struct ata_link *link)) 3504aa2731adSTejun Heo { 3505341c2c95STejun Heo msleep(ATA_WAIT_AFTER_RESET); 3506aa2731adSTejun Heo 3507aa2731adSTejun Heo return ata_wait_ready(link, deadline, check_ready); 3508aa2731adSTejun Heo } 3509aa2731adSTejun Heo 3510aa2731adSTejun Heo /** 3511936fd732STejun Heo * sata_link_debounce - debounce SATA phy status 3512936fd732STejun Heo * @link: ATA link to debounce SATA phy status for 3513c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3514d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3515c6fd2807SJeff Garzik * 3516936fd732STejun Heo * Make sure SStatus of @link reaches stable state, determined by 3517c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3518c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3519d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3520d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3521c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3522c6fd2807SJeff Garzik * 3523d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3524d4b2bab4STejun Heo * two is used. 3525d4b2bab4STejun Heo * 3526c6fd2807SJeff Garzik * LOCKING: 3527c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3528c6fd2807SJeff Garzik * 3529c6fd2807SJeff Garzik * RETURNS: 3530c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3531c6fd2807SJeff Garzik */ 3532936fd732STejun Heo int sata_link_debounce(struct ata_link *link, const unsigned long *params, 3533d4b2bab4STejun Heo unsigned long deadline) 3534c6fd2807SJeff Garzik { 3535341c2c95STejun Heo unsigned long interval = params[0]; 3536341c2c95STejun Heo unsigned long duration = params[1]; 3537d4b2bab4STejun Heo unsigned long last_jiffies, t; 3538c6fd2807SJeff Garzik u32 last, cur; 3539c6fd2807SJeff Garzik int rc; 3540c6fd2807SJeff Garzik 3541341c2c95STejun Heo t = ata_deadline(jiffies, params[2]); 3542d4b2bab4STejun Heo if (time_before(t, deadline)) 3543d4b2bab4STejun Heo deadline = t; 3544d4b2bab4STejun Heo 3545936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3546c6fd2807SJeff Garzik return rc; 3547c6fd2807SJeff Garzik cur &= 0xf; 3548c6fd2807SJeff Garzik 3549c6fd2807SJeff Garzik last = cur; 3550c6fd2807SJeff Garzik last_jiffies = jiffies; 3551c6fd2807SJeff Garzik 3552c6fd2807SJeff Garzik while (1) { 3553341c2c95STejun Heo msleep(interval); 3554936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3555c6fd2807SJeff Garzik return rc; 3556c6fd2807SJeff Garzik cur &= 0xf; 3557c6fd2807SJeff Garzik 3558c6fd2807SJeff Garzik /* DET stable? */ 3559c6fd2807SJeff Garzik if (cur == last) { 3560d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3561c6fd2807SJeff Garzik continue; 3562341c2c95STejun Heo if (time_after(jiffies, 3563341c2c95STejun Heo ata_deadline(last_jiffies, duration))) 3564c6fd2807SJeff Garzik return 0; 3565c6fd2807SJeff Garzik continue; 3566c6fd2807SJeff Garzik } 3567c6fd2807SJeff Garzik 3568c6fd2807SJeff Garzik /* unstable, start over */ 3569c6fd2807SJeff Garzik last = cur; 3570c6fd2807SJeff Garzik last_jiffies = jiffies; 3571c6fd2807SJeff Garzik 3572f1545154STejun Heo /* Check deadline. If debouncing failed, return 3573f1545154STejun Heo * -EPIPE to tell upper layer to lower link speed. 3574f1545154STejun Heo */ 3575d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3576f1545154STejun Heo return -EPIPE; 3577c6fd2807SJeff Garzik } 3578c6fd2807SJeff Garzik } 3579c6fd2807SJeff Garzik 3580c6fd2807SJeff Garzik /** 3581936fd732STejun Heo * sata_link_resume - resume SATA link 3582936fd732STejun Heo * @link: ATA link to resume SATA 3583c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3584d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3585c6fd2807SJeff Garzik * 3586936fd732STejun Heo * Resume SATA phy @link and debounce it. 3587c6fd2807SJeff Garzik * 3588c6fd2807SJeff Garzik * LOCKING: 3589c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3590c6fd2807SJeff Garzik * 3591c6fd2807SJeff Garzik * RETURNS: 3592c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3593c6fd2807SJeff Garzik */ 3594936fd732STejun Heo int sata_link_resume(struct ata_link *link, const unsigned long *params, 3595d4b2bab4STejun Heo unsigned long deadline) 3596c6fd2807SJeff Garzik { 3597ac371987STejun Heo u32 scontrol, serror; 3598c6fd2807SJeff Garzik int rc; 3599c6fd2807SJeff Garzik 3600936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3601c6fd2807SJeff Garzik return rc; 3602c6fd2807SJeff Garzik 3603c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3604c6fd2807SJeff Garzik 3605936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3606c6fd2807SJeff Garzik return rc; 3607c6fd2807SJeff Garzik 3608c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 3609c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 3610c6fd2807SJeff Garzik */ 3611c6fd2807SJeff Garzik msleep(200); 3612c6fd2807SJeff Garzik 3613ac371987STejun Heo if ((rc = sata_link_debounce(link, params, deadline))) 3614ac371987STejun Heo return rc; 3615ac371987STejun Heo 3616f046519fSTejun Heo /* clear SError, some PHYs require this even for SRST to work */ 3617ac371987STejun Heo if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) 3618ac371987STejun Heo rc = sata_scr_write(link, SCR_ERROR, serror); 3619ac371987STejun Heo 3620f046519fSTejun Heo return rc != -EINVAL ? rc : 0; 3621c6fd2807SJeff Garzik } 3622c6fd2807SJeff Garzik 3623c6fd2807SJeff Garzik /** 36240aa1113dSTejun Heo * ata_std_prereset - prepare for reset 3625cc0680a5STejun Heo * @link: ATA link to be reset 3626d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3627c6fd2807SJeff Garzik * 3628cc0680a5STejun Heo * @link is about to be reset. Initialize it. Failure from 3629b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3630b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3631b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3632b8cffc6aSTejun Heo * should just whine, not fail. 3633c6fd2807SJeff Garzik * 3634c6fd2807SJeff Garzik * LOCKING: 3635c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3636c6fd2807SJeff Garzik * 3637c6fd2807SJeff Garzik * RETURNS: 3638c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3639c6fd2807SJeff Garzik */ 36400aa1113dSTejun Heo int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3641c6fd2807SJeff Garzik { 3642cc0680a5STejun Heo struct ata_port *ap = link->ap; 3643936fd732STejun Heo struct ata_eh_context *ehc = &link->eh_context; 3644c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3645c6fd2807SJeff Garzik int rc; 3646c6fd2807SJeff Garzik 3647c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3648c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3649c6fd2807SJeff Garzik return 0; 3650c6fd2807SJeff Garzik 3651936fd732STejun Heo /* if SATA, resume link */ 3652a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3653936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 3654b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3655b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3656cc0680a5STejun Heo ata_link_printk(link, KERN_WARNING, "failed to resume " 3657c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3658c6fd2807SJeff Garzik } 3659c6fd2807SJeff Garzik 366045db2f6cSTejun Heo /* no point in trying softreset on offline link */ 3661b1c72916STejun Heo if (ata_phys_link_offline(link)) 366245db2f6cSTejun Heo ehc->i.action &= ~ATA_EH_SOFTRESET; 366345db2f6cSTejun Heo 3664c6fd2807SJeff Garzik return 0; 3665c6fd2807SJeff Garzik } 3666c6fd2807SJeff Garzik 3667c6fd2807SJeff Garzik /** 3668cc0680a5STejun Heo * sata_link_hardreset - reset link via SATA phy reset 3669cc0680a5STejun Heo * @link: link to reset 3670b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3671d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 36729dadd45bSTejun Heo * @online: optional out parameter indicating link onlineness 36739dadd45bSTejun Heo * @check_ready: optional callback to check link readiness 3674c6fd2807SJeff Garzik * 3675cc0680a5STejun Heo * SATA phy-reset @link using DET bits of SControl register. 36769dadd45bSTejun Heo * After hardreset, link readiness is waited upon using 36779dadd45bSTejun Heo * ata_wait_ready() if @check_ready is specified. LLDs are 36789dadd45bSTejun Heo * allowed to not specify @check_ready and wait itself after this 36799dadd45bSTejun Heo * function returns. Device classification is LLD's 36809dadd45bSTejun Heo * responsibility. 36819dadd45bSTejun Heo * 36829dadd45bSTejun Heo * *@online is set to one iff reset succeeded and @link is online 36839dadd45bSTejun Heo * after reset. 3684c6fd2807SJeff Garzik * 3685c6fd2807SJeff Garzik * LOCKING: 3686c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3687c6fd2807SJeff Garzik * 3688c6fd2807SJeff Garzik * RETURNS: 3689c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3690c6fd2807SJeff Garzik */ 3691cc0680a5STejun Heo int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, 36929dadd45bSTejun Heo unsigned long deadline, 36939dadd45bSTejun Heo bool *online, int (*check_ready)(struct ata_link *)) 3694c6fd2807SJeff Garzik { 3695c6fd2807SJeff Garzik u32 scontrol; 3696c6fd2807SJeff Garzik int rc; 3697c6fd2807SJeff Garzik 3698c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3699c6fd2807SJeff Garzik 37009dadd45bSTejun Heo if (online) 37019dadd45bSTejun Heo *online = false; 37029dadd45bSTejun Heo 3703936fd732STejun Heo if (sata_set_spd_needed(link)) { 3704c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3705c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3706c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3707c6fd2807SJeff Garzik * and Sil3124. 3708c6fd2807SJeff Garzik */ 3709936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3710b6103f6dSTejun Heo goto out; 3711c6fd2807SJeff Garzik 3712cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3713c6fd2807SJeff Garzik 3714936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3715b6103f6dSTejun Heo goto out; 3716c6fd2807SJeff Garzik 3717936fd732STejun Heo sata_set_spd(link); 3718c6fd2807SJeff Garzik } 3719c6fd2807SJeff Garzik 3720c6fd2807SJeff Garzik /* issue phy wake/reset */ 3721936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3722b6103f6dSTejun Heo goto out; 3723c6fd2807SJeff Garzik 3724c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3725c6fd2807SJeff Garzik 3726936fd732STejun Heo if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) 3727b6103f6dSTejun Heo goto out; 3728c6fd2807SJeff Garzik 3729c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3730c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3731c6fd2807SJeff Garzik */ 3732c6fd2807SJeff Garzik msleep(1); 3733c6fd2807SJeff Garzik 3734936fd732STejun Heo /* bring link back */ 3735936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 37369dadd45bSTejun Heo if (rc) 37379dadd45bSTejun Heo goto out; 37389dadd45bSTejun Heo /* if link is offline nothing more to do */ 3739b1c72916STejun Heo if (ata_phys_link_offline(link)) 37409dadd45bSTejun Heo goto out; 37419dadd45bSTejun Heo 37429dadd45bSTejun Heo /* Link is online. From this point, -ENODEV too is an error. */ 37439dadd45bSTejun Heo if (online) 37449dadd45bSTejun Heo *online = true; 37459dadd45bSTejun Heo 3746071f44b1STejun Heo if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { 37479dadd45bSTejun Heo /* If PMP is supported, we have to do follow-up SRST. 37489dadd45bSTejun Heo * Some PMPs don't send D2H Reg FIS after hardreset if 37499dadd45bSTejun Heo * the first port is empty. Wait only for 37509dadd45bSTejun Heo * ATA_TMOUT_PMP_SRST_WAIT. 37519dadd45bSTejun Heo */ 37529dadd45bSTejun Heo if (check_ready) { 37539dadd45bSTejun Heo unsigned long pmp_deadline; 37549dadd45bSTejun Heo 3755341c2c95STejun Heo pmp_deadline = ata_deadline(jiffies, 3756341c2c95STejun Heo ATA_TMOUT_PMP_SRST_WAIT); 37579dadd45bSTejun Heo if (time_after(pmp_deadline, deadline)) 37589dadd45bSTejun Heo pmp_deadline = deadline; 37599dadd45bSTejun Heo ata_wait_ready(link, pmp_deadline, check_ready); 37609dadd45bSTejun Heo } 37619dadd45bSTejun Heo rc = -EAGAIN; 37629dadd45bSTejun Heo goto out; 37639dadd45bSTejun Heo } 37649dadd45bSTejun Heo 37659dadd45bSTejun Heo rc = 0; 37669dadd45bSTejun Heo if (check_ready) 37679dadd45bSTejun Heo rc = ata_wait_ready(link, deadline, check_ready); 3768b6103f6dSTejun Heo out: 37690cbf0711STejun Heo if (rc && rc != -EAGAIN) { 37700cbf0711STejun Heo /* online is set iff link is online && reset succeeded */ 37710cbf0711STejun Heo if (online) 37720cbf0711STejun Heo *online = false; 37739dadd45bSTejun Heo ata_link_printk(link, KERN_ERR, 37749dadd45bSTejun Heo "COMRESET failed (errno=%d)\n", rc); 37750cbf0711STejun Heo } 3776b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3777b6103f6dSTejun Heo return rc; 3778b6103f6dSTejun Heo } 3779b6103f6dSTejun Heo 3780b6103f6dSTejun Heo /** 378157c9efdfSTejun Heo * sata_std_hardreset - COMRESET w/o waiting or classification 378257c9efdfSTejun Heo * @link: link to reset 378357c9efdfSTejun Heo * @class: resulting class of attached device 378457c9efdfSTejun Heo * @deadline: deadline jiffies for the operation 378557c9efdfSTejun Heo * 378657c9efdfSTejun Heo * Standard SATA COMRESET w/o waiting or classification. 378757c9efdfSTejun Heo * 378857c9efdfSTejun Heo * LOCKING: 378957c9efdfSTejun Heo * Kernel thread context (may sleep) 379057c9efdfSTejun Heo * 379157c9efdfSTejun Heo * RETURNS: 379257c9efdfSTejun Heo * 0 if link offline, -EAGAIN if link online, -errno on errors. 379357c9efdfSTejun Heo */ 379457c9efdfSTejun Heo int sata_std_hardreset(struct ata_link *link, unsigned int *class, 379557c9efdfSTejun Heo unsigned long deadline) 379657c9efdfSTejun Heo { 379757c9efdfSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 379857c9efdfSTejun Heo bool online; 379957c9efdfSTejun Heo int rc; 380057c9efdfSTejun Heo 380157c9efdfSTejun Heo /* do hardreset */ 380257c9efdfSTejun Heo rc = sata_link_hardreset(link, timing, deadline, &online, NULL); 380357c9efdfSTejun Heo return online ? -EAGAIN : rc; 380457c9efdfSTejun Heo } 380557c9efdfSTejun Heo 380657c9efdfSTejun Heo /** 3807203c75b8STejun Heo * ata_std_postreset - standard postreset callback 3808cc0680a5STejun Heo * @link: the target ata_link 3809c6fd2807SJeff Garzik * @classes: classes of attached devices 3810c6fd2807SJeff Garzik * 3811c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3812c6fd2807SJeff Garzik * the device might have been reset more than once using 3813c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3814c6fd2807SJeff Garzik * 3815c6fd2807SJeff Garzik * LOCKING: 3816c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3817c6fd2807SJeff Garzik */ 3818203c75b8STejun Heo void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3819c6fd2807SJeff Garzik { 3820f046519fSTejun Heo u32 serror; 3821f046519fSTejun Heo 3822c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3823c6fd2807SJeff Garzik 3824f046519fSTejun Heo /* reset complete, clear SError */ 3825f046519fSTejun Heo if (!sata_scr_read(link, SCR_ERROR, &serror)) 3826f046519fSTejun Heo sata_scr_write(link, SCR_ERROR, serror); 3827f046519fSTejun Heo 3828c6fd2807SJeff Garzik /* print link status */ 3829936fd732STejun Heo sata_print_link_status(link); 3830c6fd2807SJeff Garzik 3831c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3832c6fd2807SJeff Garzik } 3833c6fd2807SJeff Garzik 3834c6fd2807SJeff Garzik /** 3835c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3836c6fd2807SJeff Garzik * @dev: device to compare against 3837c6fd2807SJeff Garzik * @new_class: class of the new device 3838c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3839c6fd2807SJeff Garzik * 3840c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3841c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3842c6fd2807SJeff Garzik * @new_id. 3843c6fd2807SJeff Garzik * 3844c6fd2807SJeff Garzik * LOCKING: 3845c6fd2807SJeff Garzik * None. 3846c6fd2807SJeff Garzik * 3847c6fd2807SJeff Garzik * RETURNS: 3848c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3849c6fd2807SJeff Garzik */ 3850c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3851c6fd2807SJeff Garzik const u16 *new_id) 3852c6fd2807SJeff Garzik { 3853c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3854a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3855a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3856c6fd2807SJeff Garzik 3857c6fd2807SJeff Garzik if (dev->class != new_class) { 3858c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3859c6fd2807SJeff Garzik dev->class, new_class); 3860c6fd2807SJeff Garzik return 0; 3861c6fd2807SJeff Garzik } 3862c6fd2807SJeff Garzik 3863a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3864a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3865a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3866a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3867c6fd2807SJeff Garzik 3868c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3869c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3870c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3871c6fd2807SJeff Garzik return 0; 3872c6fd2807SJeff Garzik } 3873c6fd2807SJeff Garzik 3874c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3875c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3876c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3877c6fd2807SJeff Garzik return 0; 3878c6fd2807SJeff Garzik } 3879c6fd2807SJeff Garzik 3880c6fd2807SJeff Garzik return 1; 3881c6fd2807SJeff Garzik } 3882c6fd2807SJeff Garzik 3883c6fd2807SJeff Garzik /** 3884fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 38853fae450cSHenrik Kretzschmar * @dev: target ATA device 3886bff04647STejun Heo * @readid_flags: read ID flags 3887c6fd2807SJeff Garzik * 3888c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3889c6fd2807SJeff Garzik * the port. 3890c6fd2807SJeff Garzik * 3891c6fd2807SJeff Garzik * LOCKING: 3892c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3893c6fd2807SJeff Garzik * 3894c6fd2807SJeff Garzik * RETURNS: 3895c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3896c6fd2807SJeff Garzik */ 3897fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3898c6fd2807SJeff Garzik { 3899c6fd2807SJeff Garzik unsigned int class = dev->class; 39009af5c9c9STejun Heo u16 *id = (void *)dev->link->ap->sector_buf; 3901c6fd2807SJeff Garzik int rc; 3902c6fd2807SJeff Garzik 3903c6fd2807SJeff Garzik /* read ID data */ 3904bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3905c6fd2807SJeff Garzik if (rc) 3906fe30911bSTejun Heo return rc; 3907c6fd2807SJeff Garzik 3908c6fd2807SJeff Garzik /* is the device still there? */ 3909fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 3910fe30911bSTejun Heo return -ENODEV; 3911c6fd2807SJeff Garzik 3912c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3913fe30911bSTejun Heo return 0; 3914fe30911bSTejun Heo } 3915fe30911bSTejun Heo 3916fe30911bSTejun Heo /** 3917fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 3918fe30911bSTejun Heo * @dev: device to revalidate 3919422c9daaSTejun Heo * @new_class: new class code 3920fe30911bSTejun Heo * @readid_flags: read ID flags 3921fe30911bSTejun Heo * 3922fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 3923fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 3924fe30911bSTejun Heo * 3925fe30911bSTejun Heo * LOCKING: 3926fe30911bSTejun Heo * Kernel thread context (may sleep) 3927fe30911bSTejun Heo * 3928fe30911bSTejun Heo * RETURNS: 3929fe30911bSTejun Heo * 0 on success, negative errno otherwise 3930fe30911bSTejun Heo */ 3931422c9daaSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 3932422c9daaSTejun Heo unsigned int readid_flags) 3933fe30911bSTejun Heo { 39346ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 3935fe30911bSTejun Heo int rc; 3936fe30911bSTejun Heo 3937fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 3938fe30911bSTejun Heo return -ENODEV; 3939fe30911bSTejun Heo 3940422c9daaSTejun Heo /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 3941422c9daaSTejun Heo if (ata_class_enabled(new_class) && 3942422c9daaSTejun Heo new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { 3943422c9daaSTejun Heo ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", 3944422c9daaSTejun Heo dev->class, new_class); 3945422c9daaSTejun Heo rc = -ENODEV; 3946422c9daaSTejun Heo goto fail; 3947422c9daaSTejun Heo } 3948422c9daaSTejun Heo 3949fe30911bSTejun Heo /* re-read ID */ 3950fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 3951fe30911bSTejun Heo if (rc) 3952fe30911bSTejun Heo goto fail; 3953c6fd2807SJeff Garzik 3954c6fd2807SJeff Garzik /* configure device according to the new ID */ 3955efdaedc4STejun Heo rc = ata_dev_configure(dev); 39566ddcd3b0STejun Heo if (rc) 39576ddcd3b0STejun Heo goto fail; 39586ddcd3b0STejun Heo 39596ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 3960b54eebd6STejun Heo if (dev->class == ATA_DEV_ATA && n_sectors && 3961b54eebd6STejun Heo dev->n_sectors != n_sectors) { 39626ddcd3b0STejun Heo ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 39636ddcd3b0STejun Heo "%llu != %llu\n", 39646ddcd3b0STejun Heo (unsigned long long)n_sectors, 39656ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 39668270bec4STejun Heo 39678270bec4STejun Heo /* restore original n_sectors */ 39688270bec4STejun Heo dev->n_sectors = n_sectors; 39698270bec4STejun Heo 39706ddcd3b0STejun Heo rc = -ENODEV; 39716ddcd3b0STejun Heo goto fail; 39726ddcd3b0STejun Heo } 39736ddcd3b0STejun Heo 3974c6fd2807SJeff Garzik return 0; 3975c6fd2807SJeff Garzik 3976c6fd2807SJeff Garzik fail: 3977c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3978c6fd2807SJeff Garzik return rc; 3979c6fd2807SJeff Garzik } 3980c6fd2807SJeff Garzik 39816919a0a6SAlan Cox struct ata_blacklist_entry { 39826919a0a6SAlan Cox const char *model_num; 39836919a0a6SAlan Cox const char *model_rev; 39846919a0a6SAlan Cox unsigned long horkage; 39856919a0a6SAlan Cox }; 39866919a0a6SAlan Cox 39876919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 39886919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 39896919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 39906919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 39916919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 39926919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 39936919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 39946919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 39956919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 39966919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 39976919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 39986919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 39996919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 40006919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 40016919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 40026919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 40036919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 40046919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 40056919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 40066919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 40076919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 40086919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 40096919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 40106919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 40116919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 40126919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 40136919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 40146919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 40156919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 40166919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 40176919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, 401839f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 40193af9a77aSTejun Heo /* Odd clown on sil3726/4726 PMPs */ 402050af2fa1STejun Heo { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, 40216919a0a6SAlan Cox 402218d6e9d5SAlbert Lee /* Weird ATAPI devices */ 402340a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 402418d6e9d5SAlbert Lee 40256919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 40266919a0a6SAlan Cox 40276919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 40286919a0a6SAlan Cox /* NCQ is slow */ 40296919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 4030459ad688STejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 403109125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 403209125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 40337acfaf30SPaul Rolland /* NCQ is broken */ 4034539cc7c7SJeff Garzik { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, 40350e3dbc01SAlan Cox { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, 4036da6f0ec2SPaolo Ornati { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, 4037e41bd3e8STejun Heo { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, 4038539cc7c7SJeff Garzik 403936e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 404036e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 404136e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 404236e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 404336e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 40446919a0a6SAlan Cox 404516c55b03STejun Heo /* devices which puke on READ_NATIVE_MAX */ 404616c55b03STejun Heo { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, 404716c55b03STejun Heo { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, 404816c55b03STejun Heo { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, 404916c55b03STejun Heo { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, 40506919a0a6SAlan Cox 405193328e11SAlan Cox /* Devices which report 1 sector over size HPA */ 405293328e11SAlan Cox { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, 405393328e11SAlan Cox { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, 4054b152fcd3SMikko Rapeli { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, 405593328e11SAlan Cox 40566bbfd53dSAlan Cox /* Devices which get the IVB wrong */ 40576bbfd53dSAlan Cox { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, 4058a79067e5SAlan Cox /* Maybe we should just blacklist TSSTcorp... */ 4059a79067e5SAlan Cox { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, }, 4060a79067e5SAlan Cox { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, }, 40616bbfd53dSAlan Cox { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, 4062e9f33406SPeter Missel { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, 4063e9f33406SPeter Missel { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, 4064e9f33406SPeter Missel { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, 40656bbfd53dSAlan Cox 40666919a0a6SAlan Cox /* End Marker */ 40676919a0a6SAlan Cox { } 4068c6fd2807SJeff Garzik }; 4069c6fd2807SJeff Garzik 4070741b7763SAdrian Bunk static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) 4071539cc7c7SJeff Garzik { 4072539cc7c7SJeff Garzik const char *p; 4073539cc7c7SJeff Garzik int len; 4074539cc7c7SJeff Garzik 4075539cc7c7SJeff Garzik /* 4076539cc7c7SJeff Garzik * check for trailing wildcard: *\0 4077539cc7c7SJeff Garzik */ 4078539cc7c7SJeff Garzik p = strchr(patt, wildchar); 4079539cc7c7SJeff Garzik if (p && ((*(p + 1)) == 0)) 4080539cc7c7SJeff Garzik len = p - patt; 4081317b50b8SAndrew Paprocki else { 4082539cc7c7SJeff Garzik len = strlen(name); 4083317b50b8SAndrew Paprocki if (!len) { 4084317b50b8SAndrew Paprocki if (!*patt) 4085317b50b8SAndrew Paprocki return 0; 4086317b50b8SAndrew Paprocki return -1; 4087317b50b8SAndrew Paprocki } 4088317b50b8SAndrew Paprocki } 4089539cc7c7SJeff Garzik 4090539cc7c7SJeff Garzik return strncmp(patt, name, len); 4091539cc7c7SJeff Garzik } 4092539cc7c7SJeff Garzik 409375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 4094c6fd2807SJeff Garzik { 40958bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 40968bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 40976919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 4098c6fd2807SJeff Garzik 40998bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 41008bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4101c6fd2807SJeff Garzik 41026919a0a6SAlan Cox while (ad->model_num) { 4103539cc7c7SJeff Garzik if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { 41046919a0a6SAlan Cox if (ad->model_rev == NULL) 41056919a0a6SAlan Cox return ad->horkage; 4106539cc7c7SJeff Garzik if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) 41076919a0a6SAlan Cox return ad->horkage; 4108c6fd2807SJeff Garzik } 41096919a0a6SAlan Cox ad++; 4110c6fd2807SJeff Garzik } 4111c6fd2807SJeff Garzik return 0; 4112c6fd2807SJeff Garzik } 4113c6fd2807SJeff Garzik 41146919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 41156919a0a6SAlan Cox { 41166919a0a6SAlan Cox /* We don't support polling DMA. 41176919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 41186919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 41196919a0a6SAlan Cox */ 41209af5c9c9STejun Heo if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 41216919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 41226919a0a6SAlan Cox return 1; 412375683fe7STejun Heo return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 41246919a0a6SAlan Cox } 41256919a0a6SAlan Cox 4126c6fd2807SJeff Garzik /** 41276bbfd53dSAlan Cox * ata_is_40wire - check drive side detection 41286bbfd53dSAlan Cox * @dev: device 41296bbfd53dSAlan Cox * 41306bbfd53dSAlan Cox * Perform drive side detection decoding, allowing for device vendors 41316bbfd53dSAlan Cox * who can't follow the documentation. 41326bbfd53dSAlan Cox */ 41336bbfd53dSAlan Cox 41346bbfd53dSAlan Cox static int ata_is_40wire(struct ata_device *dev) 41356bbfd53dSAlan Cox { 41366bbfd53dSAlan Cox if (dev->horkage & ATA_HORKAGE_IVB) 41376bbfd53dSAlan Cox return ata_drive_40wire_relaxed(dev->id); 41386bbfd53dSAlan Cox return ata_drive_40wire(dev->id); 41396bbfd53dSAlan Cox } 41406bbfd53dSAlan Cox 41416bbfd53dSAlan Cox /** 414215a5551cSAlan Cox * cable_is_40wire - 40/80/SATA decider 414315a5551cSAlan Cox * @ap: port to consider 414415a5551cSAlan Cox * 414515a5551cSAlan Cox * This function encapsulates the policy for speed management 414615a5551cSAlan Cox * in one place. At the moment we don't cache the result but 414715a5551cSAlan Cox * there is a good case for setting ap->cbl to the result when 414815a5551cSAlan Cox * we are called with unknown cables (and figuring out if it 414915a5551cSAlan Cox * impacts hotplug at all). 415015a5551cSAlan Cox * 415115a5551cSAlan Cox * Return 1 if the cable appears to be 40 wire. 415215a5551cSAlan Cox */ 415315a5551cSAlan Cox 415415a5551cSAlan Cox static int cable_is_40wire(struct ata_port *ap) 415515a5551cSAlan Cox { 415615a5551cSAlan Cox struct ata_link *link; 415715a5551cSAlan Cox struct ata_device *dev; 415815a5551cSAlan Cox 415915a5551cSAlan Cox /* If the controller thinks we are 40 wire, we are */ 416015a5551cSAlan Cox if (ap->cbl == ATA_CBL_PATA40) 416115a5551cSAlan Cox return 1; 416215a5551cSAlan Cox /* If the controller thinks we are 80 wire, we are */ 416315a5551cSAlan Cox if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 416415a5551cSAlan Cox return 0; 4165f792068eSAlan Cox /* If the system is known to be 40 wire short cable (eg laptop), 4166f792068eSAlan Cox then we allow 80 wire modes even if the drive isn't sure */ 4167f792068eSAlan Cox if (ap->cbl == ATA_CBL_PATA40_SHORT) 4168f792068eSAlan Cox return 0; 416915a5551cSAlan Cox /* If the controller doesn't know we scan 417015a5551cSAlan Cox 417115a5551cSAlan Cox - Note: We look for all 40 wire detects at this point. 417215a5551cSAlan Cox Any 80 wire detect is taken to be 80 wire cable 417315a5551cSAlan Cox because 417415a5551cSAlan Cox - In many setups only the one drive (slave if present) 417515a5551cSAlan Cox will give a valid detect 417615a5551cSAlan Cox - If you have a non detect capable drive you don't 417715a5551cSAlan Cox want it to colour the choice 417815a5551cSAlan Cox */ 417915a5551cSAlan Cox ata_port_for_each_link(link, ap) { 418015a5551cSAlan Cox ata_link_for_each_dev(dev, link) { 418115a5551cSAlan Cox if (!ata_is_40wire(dev)) 418215a5551cSAlan Cox return 0; 418315a5551cSAlan Cox } 418415a5551cSAlan Cox } 418515a5551cSAlan Cox return 1; 418615a5551cSAlan Cox } 418715a5551cSAlan Cox 418815a5551cSAlan Cox /** 4189c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 4190c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 4191c6fd2807SJeff Garzik * 4192c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 4193c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 4194c6fd2807SJeff Garzik * known limits including host controller limits, device 4195c6fd2807SJeff Garzik * blacklist, etc... 4196c6fd2807SJeff Garzik * 4197c6fd2807SJeff Garzik * LOCKING: 4198c6fd2807SJeff Garzik * None. 4199c6fd2807SJeff Garzik */ 4200c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 4201c6fd2807SJeff Garzik { 42029af5c9c9STejun Heo struct ata_link *link = dev->link; 42039af5c9c9STejun Heo struct ata_port *ap = link->ap; 4204cca3974eSJeff Garzik struct ata_host *host = ap->host; 4205c6fd2807SJeff Garzik unsigned long xfer_mask; 4206c6fd2807SJeff Garzik 4207c6fd2807SJeff Garzik /* controller modes available */ 4208c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 4209c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 4210c6fd2807SJeff Garzik 42118343f889SRobert Hancock /* drive modes available */ 4212c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4213c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 4214c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 4215c6fd2807SJeff Garzik 4216b352e57dSAlan Cox /* 4217b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 4218b352e57dSAlan Cox * cable 4219b352e57dSAlan Cox */ 4220b352e57dSAlan Cox if (ata_dev_pair(dev)) { 4221b352e57dSAlan Cox /* No PIO5 or PIO6 */ 4222b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4223b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 4224b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4225b352e57dSAlan Cox } 4226b352e57dSAlan Cox 4227c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 4228c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4229c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 4230c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 4231c6fd2807SJeff Garzik } 4232c6fd2807SJeff Garzik 423314d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 423414d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 4235c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4236c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 4237c6fd2807SJeff Garzik "other device, disabling DMA\n"); 4238c6fd2807SJeff Garzik } 4239c6fd2807SJeff Garzik 4240e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 4241e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 4242e424675fSJeff Garzik 4243c6fd2807SJeff Garzik if (ap->ops->mode_filter) 4244a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4245c6fd2807SJeff Garzik 42468343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 42478343f889SRobert Hancock * we handle hot plug the cable type can itself change. 42488343f889SRobert Hancock * Check this last so that we know if the transfer rate was 42498343f889SRobert Hancock * solely limited by the cable. 42508343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 42518343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 42528343f889SRobert Hancock * is used safely for 80 are not checked here. 42538343f889SRobert Hancock */ 42548343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 42558343f889SRobert Hancock /* UDMA/44 or higher would be available */ 425615a5551cSAlan Cox if (cable_is_40wire(ap)) { 42578343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 42588343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 42598343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 42608343f889SRobert Hancock } 42618343f889SRobert Hancock 4262c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4263c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 4264c6fd2807SJeff Garzik } 4265c6fd2807SJeff Garzik 4266c6fd2807SJeff Garzik /** 4267c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4268c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4269c6fd2807SJeff Garzik * 4270c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 4271c6fd2807SJeff Garzik * on port @ap. 4272c6fd2807SJeff Garzik * 4273c6fd2807SJeff Garzik * LOCKING: 4274c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 4275c6fd2807SJeff Garzik * 4276c6fd2807SJeff Garzik * RETURNS: 4277c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4278c6fd2807SJeff Garzik */ 4279c6fd2807SJeff Garzik 4280c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4281c6fd2807SJeff Garzik { 4282c6fd2807SJeff Garzik struct ata_taskfile tf; 4283c6fd2807SJeff Garzik unsigned int err_mask; 4284c6fd2807SJeff Garzik 4285c6fd2807SJeff Garzik /* set up set-features taskfile */ 4286c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 4287c6fd2807SJeff Garzik 4288464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 4289464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 4290464cf177STejun Heo */ 4291c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4292c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 4293c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 4294464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4295c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4296b9f8ab2dSAlan Cox /* If we are using IORDY we must send the mode setting command */ 4297b9f8ab2dSAlan Cox if (ata_pio_need_iordy(dev)) 4298c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 4299b9f8ab2dSAlan Cox /* If the device has IORDY and the controller does not - turn it off */ 4300b9f8ab2dSAlan Cox else if (ata_id_has_iordy(dev->id)) 4301b9f8ab2dSAlan Cox tf.nsect = 0x01; 4302b9f8ab2dSAlan Cox else /* In the ancient relic department - skip all of this */ 4303b9f8ab2dSAlan Cox return 0; 4304c6fd2807SJeff Garzik 43052b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4306c6fd2807SJeff Garzik 4307c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4308c6fd2807SJeff Garzik return err_mask; 4309c6fd2807SJeff Garzik } 4310c6fd2807SJeff Garzik /** 4311218f3d30SJeff Garzik * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES 43129f45cbd3SKristen Carlson Accardi * @dev: Device to which command will be sent 43139f45cbd3SKristen Carlson Accardi * @enable: Whether to enable or disable the feature 4314218f3d30SJeff Garzik * @feature: The sector count represents the feature to set 43159f45cbd3SKristen Carlson Accardi * 43169f45cbd3SKristen Carlson Accardi * Issue SET FEATURES - SATA FEATURES command to device @dev 4317218f3d30SJeff Garzik * on port @ap with sector count 43189f45cbd3SKristen Carlson Accardi * 43199f45cbd3SKristen Carlson Accardi * LOCKING: 43209f45cbd3SKristen Carlson Accardi * PCI/etc. bus probe sem. 43219f45cbd3SKristen Carlson Accardi * 43229f45cbd3SKristen Carlson Accardi * RETURNS: 43239f45cbd3SKristen Carlson Accardi * 0 on success, AC_ERR_* mask otherwise. 43249f45cbd3SKristen Carlson Accardi */ 4325218f3d30SJeff Garzik static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, 4326218f3d30SJeff Garzik u8 feature) 43279f45cbd3SKristen Carlson Accardi { 43289f45cbd3SKristen Carlson Accardi struct ata_taskfile tf; 43299f45cbd3SKristen Carlson Accardi unsigned int err_mask; 43309f45cbd3SKristen Carlson Accardi 43319f45cbd3SKristen Carlson Accardi /* set up set-features taskfile */ 43329f45cbd3SKristen Carlson Accardi DPRINTK("set features - SATA features\n"); 43339f45cbd3SKristen Carlson Accardi 43349f45cbd3SKristen Carlson Accardi ata_tf_init(dev, &tf); 43359f45cbd3SKristen Carlson Accardi tf.command = ATA_CMD_SET_FEATURES; 43369f45cbd3SKristen Carlson Accardi tf.feature = enable; 43379f45cbd3SKristen Carlson Accardi tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 43389f45cbd3SKristen Carlson Accardi tf.protocol = ATA_PROT_NODATA; 4339218f3d30SJeff Garzik tf.nsect = feature; 43409f45cbd3SKristen Carlson Accardi 43412b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 43429f45cbd3SKristen Carlson Accardi 43439f45cbd3SKristen Carlson Accardi DPRINTK("EXIT, err_mask=%x\n", err_mask); 43449f45cbd3SKristen Carlson Accardi return err_mask; 43459f45cbd3SKristen Carlson Accardi } 43469f45cbd3SKristen Carlson Accardi 43479f45cbd3SKristen Carlson Accardi /** 4348c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 4349c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4350c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 4351c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 4352c6fd2807SJeff Garzik * 4353c6fd2807SJeff Garzik * LOCKING: 4354c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4355c6fd2807SJeff Garzik * 4356c6fd2807SJeff Garzik * RETURNS: 4357c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4358c6fd2807SJeff Garzik */ 4359c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 4360c6fd2807SJeff Garzik u16 heads, u16 sectors) 4361c6fd2807SJeff Garzik { 4362c6fd2807SJeff Garzik struct ata_taskfile tf; 4363c6fd2807SJeff Garzik unsigned int err_mask; 4364c6fd2807SJeff Garzik 4365c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 4366c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4367c6fd2807SJeff Garzik return AC_ERR_INVALID; 4368c6fd2807SJeff Garzik 4369c6fd2807SJeff Garzik /* set up init dev params taskfile */ 4370c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 4371c6fd2807SJeff Garzik 4372c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4373c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 4374c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4375c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4376c6fd2807SJeff Garzik tf.nsect = sectors; 4377c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4378c6fd2807SJeff Garzik 43792b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 438018b2466cSAlan Cox /* A clean abort indicates an original or just out of spec drive 438118b2466cSAlan Cox and we should continue as we issue the setup based on the 438218b2466cSAlan Cox drive reported working geometry */ 438318b2466cSAlan Cox if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 438418b2466cSAlan Cox err_mask = 0; 4385c6fd2807SJeff Garzik 4386c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4387c6fd2807SJeff Garzik return err_mask; 4388c6fd2807SJeff Garzik } 4389c6fd2807SJeff Garzik 4390c6fd2807SJeff Garzik /** 4391c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 4392c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 4393c6fd2807SJeff Garzik * 4394c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 4395c6fd2807SJeff Garzik * 4396c6fd2807SJeff Garzik * LOCKING: 4397cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4398c6fd2807SJeff Garzik */ 439970e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 4400c6fd2807SJeff Garzik { 4401c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4402ff2aeb1eSTejun Heo struct scatterlist *sg = qc->sg; 4403c6fd2807SJeff Garzik int dir = qc->dma_dir; 4404c6fd2807SJeff Garzik 4405c6fd2807SJeff Garzik WARN_ON(sg == NULL); 4406c6fd2807SJeff Garzik 4407dde20207SJames Bottomley VPRINTK("unmapping %u sg elements\n", qc->n_elem); 4408c6fd2807SJeff Garzik 4409dde20207SJames Bottomley if (qc->n_elem) 4410dde20207SJames Bottomley dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 4411c6fd2807SJeff Garzik 4412c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4413ff2aeb1eSTejun Heo qc->sg = NULL; 4414c6fd2807SJeff Garzik } 4415c6fd2807SJeff Garzik 4416c6fd2807SJeff Garzik /** 44175895ef9aSTejun Heo * atapi_check_dma - Check whether ATAPI DMA can be supported 4418c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4419c6fd2807SJeff Garzik * 4420c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4421c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4422c6fd2807SJeff Garzik * supplied PACKET command. 4423c6fd2807SJeff Garzik * 4424c6fd2807SJeff Garzik * LOCKING: 4425cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4426c6fd2807SJeff Garzik * 4427c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4428c6fd2807SJeff Garzik * nonzero otherwise 4429c6fd2807SJeff Garzik */ 44305895ef9aSTejun Heo int atapi_check_dma(struct ata_queued_cmd *qc) 4431c6fd2807SJeff Garzik { 4432c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4433c6fd2807SJeff Garzik 4434b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4435b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4436b9a4197eSTejun Heo */ 4437b9a4197eSTejun Heo if (unlikely(qc->nbytes & 15)) 44386f23a31dSAlbert Lee return 1; 44396f23a31dSAlbert Lee 4440c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4441b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4442c6fd2807SJeff Garzik 4443b9a4197eSTejun Heo return 0; 4444c6fd2807SJeff Garzik } 4445b9a4197eSTejun Heo 4446c6fd2807SJeff Garzik /** 444731cc23b3STejun Heo * ata_std_qc_defer - Check whether a qc needs to be deferred 444831cc23b3STejun Heo * @qc: ATA command in question 444931cc23b3STejun Heo * 445031cc23b3STejun Heo * Non-NCQ commands cannot run with any other command, NCQ or 445131cc23b3STejun Heo * not. As upper layer only knows the queue depth, we are 445231cc23b3STejun Heo * responsible for maintaining exclusion. This function checks 445331cc23b3STejun Heo * whether a new command @qc can be issued. 445431cc23b3STejun Heo * 445531cc23b3STejun Heo * LOCKING: 445631cc23b3STejun Heo * spin_lock_irqsave(host lock) 445731cc23b3STejun Heo * 445831cc23b3STejun Heo * RETURNS: 445931cc23b3STejun Heo * ATA_DEFER_* if deferring is needed, 0 otherwise. 446031cc23b3STejun Heo */ 446131cc23b3STejun Heo int ata_std_qc_defer(struct ata_queued_cmd *qc) 446231cc23b3STejun Heo { 446331cc23b3STejun Heo struct ata_link *link = qc->dev->link; 446431cc23b3STejun Heo 446531cc23b3STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 446631cc23b3STejun Heo if (!ata_tag_valid(link->active_tag)) 446731cc23b3STejun Heo return 0; 446831cc23b3STejun Heo } else { 446931cc23b3STejun Heo if (!ata_tag_valid(link->active_tag) && !link->sactive) 447031cc23b3STejun Heo return 0; 447131cc23b3STejun Heo } 447231cc23b3STejun Heo 447331cc23b3STejun Heo return ATA_DEFER_LINK; 447431cc23b3STejun Heo } 447531cc23b3STejun Heo 4476c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4477c6fd2807SJeff Garzik 4478c6fd2807SJeff Garzik /** 4479c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4480c6fd2807SJeff Garzik * @qc: Command to be associated 4481c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4482c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4483c6fd2807SJeff Garzik * 4484c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4485c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4486c6fd2807SJeff Garzik * elements. 4487c6fd2807SJeff Garzik * 4488c6fd2807SJeff Garzik * LOCKING: 4489cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4490c6fd2807SJeff Garzik */ 4491c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4492c6fd2807SJeff Garzik unsigned int n_elem) 4493c6fd2807SJeff Garzik { 4494ff2aeb1eSTejun Heo qc->sg = sg; 4495c6fd2807SJeff Garzik qc->n_elem = n_elem; 4496ff2aeb1eSTejun Heo qc->cursg = qc->sg; 4497ff2aeb1eSTejun Heo } 4498ff2aeb1eSTejun Heo 4499c6fd2807SJeff Garzik /** 4500c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4501c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4502c6fd2807SJeff Garzik * 4503c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4504c6fd2807SJeff Garzik * 4505c6fd2807SJeff Garzik * LOCKING: 4506cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4507c6fd2807SJeff Garzik * 4508c6fd2807SJeff Garzik * RETURNS: 4509c6fd2807SJeff Garzik * Zero on success, negative on error. 4510c6fd2807SJeff Garzik * 4511c6fd2807SJeff Garzik */ 4512c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4513c6fd2807SJeff Garzik { 4514c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4515dde20207SJames Bottomley unsigned int n_elem; 4516c6fd2807SJeff Garzik 451744877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4518c6fd2807SJeff Garzik 4519dde20207SJames Bottomley n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4520dde20207SJames Bottomley if (n_elem < 1) 4521c6fd2807SJeff Garzik return -1; 4522c6fd2807SJeff Garzik 4523dde20207SJames Bottomley DPRINTK("%d sg elements mapped\n", n_elem); 4524dde20207SJames Bottomley 4525dde20207SJames Bottomley qc->n_elem = n_elem; 4526f92a2636STejun Heo qc->flags |= ATA_QCFLAG_DMAMAP; 4527c6fd2807SJeff Garzik 4528c6fd2807SJeff Garzik return 0; 4529c6fd2807SJeff Garzik } 4530c6fd2807SJeff Garzik 4531c6fd2807SJeff Garzik /** 4532c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4533c6fd2807SJeff Garzik * @buf: Buffer to swap 4534c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4535c6fd2807SJeff Garzik * 4536c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4537c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4538c6fd2807SJeff Garzik * vice-versa. 4539c6fd2807SJeff Garzik * 4540c6fd2807SJeff Garzik * LOCKING: 4541c6fd2807SJeff Garzik * Inherited from caller. 4542c6fd2807SJeff Garzik */ 4543c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4544c6fd2807SJeff Garzik { 4545c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4546c6fd2807SJeff Garzik unsigned int i; 4547c6fd2807SJeff Garzik 4548c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4549c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4550c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4551c6fd2807SJeff Garzik } 4552c6fd2807SJeff Garzik 4553c6fd2807SJeff Garzik /** 4554c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 4555c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4556c6fd2807SJeff Garzik * 4557c6fd2807SJeff Garzik * LOCKING: 4558c6fd2807SJeff Garzik * None. 4559c6fd2807SJeff Garzik */ 4560c6fd2807SJeff Garzik 45612fca5ccfSJens Axboe struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag) 4562c6fd2807SJeff Garzik { 45639af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 4564c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4565c6fd2807SJeff Garzik 45662fca5ccfSJens Axboe if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 45672fca5ccfSJens Axboe return NULL; 45682fca5ccfSJens Axboe 45692fca5ccfSJens Axboe qc = __ata_qc_from_tag(ap, tag); 4570c6fd2807SJeff Garzik if (qc) { 4571c6fd2807SJeff Garzik qc->scsicmd = NULL; 4572c6fd2807SJeff Garzik qc->ap = ap; 4573c6fd2807SJeff Garzik qc->dev = dev; 45742fca5ccfSJens Axboe qc->tag = tag; 4575c6fd2807SJeff Garzik 4576c6fd2807SJeff Garzik ata_qc_reinit(qc); 4577c6fd2807SJeff Garzik } 4578c6fd2807SJeff Garzik 4579c6fd2807SJeff Garzik return qc; 4580c6fd2807SJeff Garzik } 4581c6fd2807SJeff Garzik 4582c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 4583c6fd2807SJeff Garzik { 4584c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 45859af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 4586c6fd2807SJeff Garzik 4587c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4588c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4589c6fd2807SJeff Garzik 4590c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4591c6fd2807SJeff Garzik ata_sg_clean(qc); 4592c6fd2807SJeff Garzik 4593c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 4594da917d69STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 45959af5c9c9STejun Heo link->sactive &= ~(1 << qc->tag); 4596da917d69STejun Heo if (!link->sactive) 4597da917d69STejun Heo ap->nr_active_links--; 4598da917d69STejun Heo } else { 45999af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 4600da917d69STejun Heo ap->nr_active_links--; 4601da917d69STejun Heo } 4602da917d69STejun Heo 4603da917d69STejun Heo /* clear exclusive status */ 4604da917d69STejun Heo if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 4605da917d69STejun Heo ap->excl_link == link)) 4606da917d69STejun Heo ap->excl_link = NULL; 4607c6fd2807SJeff Garzik 4608c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 4609c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 4610c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 4611c6fd2807SJeff Garzik */ 4612c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 4613c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 4614c6fd2807SJeff Garzik 4615c6fd2807SJeff Garzik /* call completion callback */ 4616c6fd2807SJeff Garzik qc->complete_fn(qc); 4617c6fd2807SJeff Garzik } 4618c6fd2807SJeff Garzik 461939599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 462039599a53STejun Heo { 462139599a53STejun Heo struct ata_port *ap = qc->ap; 462239599a53STejun Heo 462339599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 462422183bf5STejun Heo ap->ops->qc_fill_rtf(qc); 462539599a53STejun Heo } 462639599a53STejun Heo 462700115e0fSTejun Heo static void ata_verify_xfer(struct ata_queued_cmd *qc) 462800115e0fSTejun Heo { 462900115e0fSTejun Heo struct ata_device *dev = qc->dev; 463000115e0fSTejun Heo 463100115e0fSTejun Heo if (ata_tag_internal(qc->tag)) 463200115e0fSTejun Heo return; 463300115e0fSTejun Heo 463400115e0fSTejun Heo if (ata_is_nodata(qc->tf.protocol)) 463500115e0fSTejun Heo return; 463600115e0fSTejun Heo 463700115e0fSTejun Heo if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 463800115e0fSTejun Heo return; 463900115e0fSTejun Heo 464000115e0fSTejun Heo dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 464100115e0fSTejun Heo } 464200115e0fSTejun Heo 4643c6fd2807SJeff Garzik /** 4644c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 4645c6fd2807SJeff Garzik * @qc: Command to complete 4646c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 4647c6fd2807SJeff Garzik * 4648c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 4649c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 4650c6fd2807SJeff Garzik * 4651c6fd2807SJeff Garzik * LOCKING: 4652cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4653c6fd2807SJeff Garzik */ 4654c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 4655c6fd2807SJeff Garzik { 4656c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4657c6fd2807SJeff Garzik 4658c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 4659c6fd2807SJeff Garzik * synchronize EH with regular execution path. 4660c6fd2807SJeff Garzik * 4661c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4662c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 4663c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 4664c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 4665c6fd2807SJeff Garzik * 4666c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 4667c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4668c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 4669c6fd2807SJeff Garzik * taken care of. 4670c6fd2807SJeff Garzik */ 4671c6fd2807SJeff Garzik if (ap->ops->error_handler) { 46724dbfa39bSTejun Heo struct ata_device *dev = qc->dev; 46734dbfa39bSTejun Heo struct ata_eh_info *ehi = &dev->link->eh_info; 46744dbfa39bSTejun Heo 4675c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 4676c6fd2807SJeff Garzik 4677c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4678c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 4679c6fd2807SJeff Garzik 4680c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4681c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 4682c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 468339599a53STejun Heo fill_result_tf(qc); 4684c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 4685c6fd2807SJeff Garzik return; 4686c6fd2807SJeff Garzik } 4687c6fd2807SJeff Garzik } 4688c6fd2807SJeff Garzik 4689c6fd2807SJeff Garzik /* read result TF if requested */ 4690c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 469139599a53STejun Heo fill_result_tf(qc); 4692c6fd2807SJeff Garzik 46934dbfa39bSTejun Heo /* Some commands need post-processing after successful 46944dbfa39bSTejun Heo * completion. 46954dbfa39bSTejun Heo */ 46964dbfa39bSTejun Heo switch (qc->tf.command) { 46974dbfa39bSTejun Heo case ATA_CMD_SET_FEATURES: 46984dbfa39bSTejun Heo if (qc->tf.feature != SETFEATURES_WC_ON && 46994dbfa39bSTejun Heo qc->tf.feature != SETFEATURES_WC_OFF) 47004dbfa39bSTejun Heo break; 47014dbfa39bSTejun Heo /* fall through */ 47024dbfa39bSTejun Heo case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 47034dbfa39bSTejun Heo case ATA_CMD_SET_MULTI: /* multi_count changed */ 47044dbfa39bSTejun Heo /* revalidate device */ 47054dbfa39bSTejun Heo ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 47064dbfa39bSTejun Heo ata_port_schedule_eh(ap); 47074dbfa39bSTejun Heo break; 4708054a5fbaSTejun Heo 4709054a5fbaSTejun Heo case ATA_CMD_SLEEP: 4710054a5fbaSTejun Heo dev->flags |= ATA_DFLAG_SLEEPING; 4711054a5fbaSTejun Heo break; 47124dbfa39bSTejun Heo } 47134dbfa39bSTejun Heo 471400115e0fSTejun Heo if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 471500115e0fSTejun Heo ata_verify_xfer(qc); 471600115e0fSTejun Heo 4717c6fd2807SJeff Garzik __ata_qc_complete(qc); 4718c6fd2807SJeff Garzik } else { 4719c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 4720c6fd2807SJeff Garzik return; 4721c6fd2807SJeff Garzik 4722c6fd2807SJeff Garzik /* read result TF if failed or requested */ 4723c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 472439599a53STejun Heo fill_result_tf(qc); 4725c6fd2807SJeff Garzik 4726c6fd2807SJeff Garzik __ata_qc_complete(qc); 4727c6fd2807SJeff Garzik } 4728c6fd2807SJeff Garzik } 4729c6fd2807SJeff Garzik 4730c6fd2807SJeff Garzik /** 4731c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 4732c6fd2807SJeff Garzik * @ap: port in question 4733c6fd2807SJeff Garzik * @qc_active: new qc_active mask 4734c6fd2807SJeff Garzik * 4735c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 4736c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 4737c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 4738c6fd2807SJeff Garzik * and commands are completed accordingly. 4739c6fd2807SJeff Garzik * 4740c6fd2807SJeff Garzik * LOCKING: 4741cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4742c6fd2807SJeff Garzik * 4743c6fd2807SJeff Garzik * RETURNS: 4744c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 4745c6fd2807SJeff Garzik */ 474679f97dadSTejun Heo int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) 4747c6fd2807SJeff Garzik { 4748c6fd2807SJeff Garzik int nr_done = 0; 4749c6fd2807SJeff Garzik u32 done_mask; 4750c6fd2807SJeff Garzik int i; 4751c6fd2807SJeff Garzik 4752c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 4753c6fd2807SJeff Garzik 4754c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 4755c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 4756c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 4757c6fd2807SJeff Garzik return -EINVAL; 4758c6fd2807SJeff Garzik } 4759c6fd2807SJeff Garzik 4760c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 4761c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4762c6fd2807SJeff Garzik 4763c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 4764c6fd2807SJeff Garzik continue; 4765c6fd2807SJeff Garzik 4766c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 4767c6fd2807SJeff Garzik ata_qc_complete(qc); 4768c6fd2807SJeff Garzik nr_done++; 4769c6fd2807SJeff Garzik } 4770c6fd2807SJeff Garzik } 4771c6fd2807SJeff Garzik 4772c6fd2807SJeff Garzik return nr_done; 4773c6fd2807SJeff Garzik } 4774c6fd2807SJeff Garzik 4775c6fd2807SJeff Garzik /** 4776c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 4777c6fd2807SJeff Garzik * @qc: command to issue to device 4778c6fd2807SJeff Garzik * 4779c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 4780c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 4781c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 4782c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 4783c6fd2807SJeff Garzik * 4784c6fd2807SJeff Garzik * LOCKING: 4785cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4786c6fd2807SJeff Garzik */ 4787c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 4788c6fd2807SJeff Garzik { 4789c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 47909af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 4791405e66b3STejun Heo u8 prot = qc->tf.protocol; 4792c6fd2807SJeff Garzik 4793c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 4794c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 4795c6fd2807SJeff Garzik * request ATAPI sense. 4796c6fd2807SJeff Garzik */ 47979af5c9c9STejun Heo WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); 4798c6fd2807SJeff Garzik 47991973a023STejun Heo if (ata_is_ncq(prot)) { 48009af5c9c9STejun Heo WARN_ON(link->sactive & (1 << qc->tag)); 4801da917d69STejun Heo 4802da917d69STejun Heo if (!link->sactive) 4803da917d69STejun Heo ap->nr_active_links++; 48049af5c9c9STejun Heo link->sactive |= 1 << qc->tag; 4805c6fd2807SJeff Garzik } else { 48069af5c9c9STejun Heo WARN_ON(link->sactive); 4807da917d69STejun Heo 4808da917d69STejun Heo ap->nr_active_links++; 48099af5c9c9STejun Heo link->active_tag = qc->tag; 4810c6fd2807SJeff Garzik } 4811c6fd2807SJeff Garzik 4812c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 4813c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 4814c6fd2807SJeff Garzik 4815f92a2636STejun Heo /* We guarantee to LLDs that they will have at least one 4816f92a2636STejun Heo * non-zero sg if the command is a data command. 4817f92a2636STejun Heo */ 4818ff2aeb1eSTejun Heo BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); 4819f92a2636STejun Heo 4820405e66b3STejun Heo if (ata_is_dma(prot) || (ata_is_pio(prot) && 4821f92a2636STejun Heo (ap->flags & ATA_FLAG_PIO_DMA))) 4822c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 4823c6fd2807SJeff Garzik goto sg_err; 4824c6fd2807SJeff Garzik 4825cf480626STejun Heo /* if device is sleeping, schedule reset and abort the link */ 4826054a5fbaSTejun Heo if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 4827cf480626STejun Heo link->eh_info.action |= ATA_EH_RESET; 4828054a5fbaSTejun Heo ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 4829054a5fbaSTejun Heo ata_link_abort(link); 4830054a5fbaSTejun Heo return; 4831054a5fbaSTejun Heo } 4832054a5fbaSTejun Heo 4833c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 4834c6fd2807SJeff Garzik 4835c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 4836c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4837c6fd2807SJeff Garzik goto err; 4838c6fd2807SJeff Garzik return; 4839c6fd2807SJeff Garzik 4840c6fd2807SJeff Garzik sg_err: 4841c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 4842c6fd2807SJeff Garzik err: 4843c6fd2807SJeff Garzik ata_qc_complete(qc); 4844c6fd2807SJeff Garzik } 4845c6fd2807SJeff Garzik 4846c6fd2807SJeff Garzik /** 4847c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 4848936fd732STejun Heo * @link: ATA link to test SCR accessibility for 4849c6fd2807SJeff Garzik * 4850936fd732STejun Heo * Test whether SCRs are accessible for @link. 4851c6fd2807SJeff Garzik * 4852c6fd2807SJeff Garzik * LOCKING: 4853c6fd2807SJeff Garzik * None. 4854c6fd2807SJeff Garzik * 4855c6fd2807SJeff Garzik * RETURNS: 4856c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 4857c6fd2807SJeff Garzik */ 4858936fd732STejun Heo int sata_scr_valid(struct ata_link *link) 4859c6fd2807SJeff Garzik { 4860936fd732STejun Heo struct ata_port *ap = link->ap; 4861936fd732STejun Heo 4862a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 4863c6fd2807SJeff Garzik } 4864c6fd2807SJeff Garzik 4865c6fd2807SJeff Garzik /** 4866c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 4867936fd732STejun Heo * @link: ATA link to read SCR for 4868c6fd2807SJeff Garzik * @reg: SCR to read 4869c6fd2807SJeff Garzik * @val: Place to store read value 4870c6fd2807SJeff Garzik * 4871936fd732STejun Heo * Read SCR register @reg of @link into *@val. This function is 4872633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 4873633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 4874c6fd2807SJeff Garzik * 4875c6fd2807SJeff Garzik * LOCKING: 4876633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 4877c6fd2807SJeff Garzik * 4878c6fd2807SJeff Garzik * RETURNS: 4879c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 4880c6fd2807SJeff Garzik */ 4881936fd732STejun Heo int sata_scr_read(struct ata_link *link, int reg, u32 *val) 4882c6fd2807SJeff Garzik { 4883633273a3STejun Heo if (ata_is_host_link(link)) { 4884936fd732STejun Heo if (sata_scr_valid(link)) 488582ef04fbSTejun Heo return link->ap->ops->scr_read(link, reg, val); 4886c6fd2807SJeff Garzik return -EOPNOTSUPP; 4887c6fd2807SJeff Garzik } 4888c6fd2807SJeff Garzik 4889633273a3STejun Heo return sata_pmp_scr_read(link, reg, val); 4890633273a3STejun Heo } 4891633273a3STejun Heo 4892c6fd2807SJeff Garzik /** 4893c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 4894936fd732STejun Heo * @link: ATA link to write SCR for 4895c6fd2807SJeff Garzik * @reg: SCR to write 4896c6fd2807SJeff Garzik * @val: value to write 4897c6fd2807SJeff Garzik * 4898936fd732STejun Heo * Write @val to SCR register @reg of @link. This function is 4899633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 4900633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 4901c6fd2807SJeff Garzik * 4902c6fd2807SJeff Garzik * LOCKING: 4903633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 4904c6fd2807SJeff Garzik * 4905c6fd2807SJeff Garzik * RETURNS: 4906c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 4907c6fd2807SJeff Garzik */ 4908936fd732STejun Heo int sata_scr_write(struct ata_link *link, int reg, u32 val) 4909c6fd2807SJeff Garzik { 4910633273a3STejun Heo if (ata_is_host_link(link)) { 4911936fd732STejun Heo if (sata_scr_valid(link)) 491282ef04fbSTejun Heo return link->ap->ops->scr_write(link, reg, val); 4913c6fd2807SJeff Garzik return -EOPNOTSUPP; 4914c6fd2807SJeff Garzik } 4915c6fd2807SJeff Garzik 4916633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 4917633273a3STejun Heo } 4918633273a3STejun Heo 4919c6fd2807SJeff Garzik /** 4920c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 4921936fd732STejun Heo * @link: ATA link to write SCR for 4922c6fd2807SJeff Garzik * @reg: SCR to write 4923c6fd2807SJeff Garzik * @val: value to write 4924c6fd2807SJeff Garzik * 4925c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 4926c6fd2807SJeff Garzik * function performs flush after writing to the register. 4927c6fd2807SJeff Garzik * 4928c6fd2807SJeff Garzik * LOCKING: 4929633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 4930c6fd2807SJeff Garzik * 4931c6fd2807SJeff Garzik * RETURNS: 4932c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 4933c6fd2807SJeff Garzik */ 4934936fd732STejun Heo int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 4935c6fd2807SJeff Garzik { 4936633273a3STejun Heo if (ata_is_host_link(link)) { 4937da3dbb17STejun Heo int rc; 4938da3dbb17STejun Heo 4939936fd732STejun Heo if (sata_scr_valid(link)) { 494082ef04fbSTejun Heo rc = link->ap->ops->scr_write(link, reg, val); 4941da3dbb17STejun Heo if (rc == 0) 494282ef04fbSTejun Heo rc = link->ap->ops->scr_read(link, reg, &val); 4943da3dbb17STejun Heo return rc; 4944c6fd2807SJeff Garzik } 4945c6fd2807SJeff Garzik return -EOPNOTSUPP; 4946c6fd2807SJeff Garzik } 4947c6fd2807SJeff Garzik 4948633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 4949633273a3STejun Heo } 4950633273a3STejun Heo 4951c6fd2807SJeff Garzik /** 4952b1c72916STejun Heo * ata_phys_link_online - test whether the given link is online 4953936fd732STejun Heo * @link: ATA link to test 4954c6fd2807SJeff Garzik * 4955936fd732STejun Heo * Test whether @link is online. Note that this function returns 4956936fd732STejun Heo * 0 if online status of @link cannot be obtained, so 4957936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 4958c6fd2807SJeff Garzik * 4959c6fd2807SJeff Garzik * LOCKING: 4960c6fd2807SJeff Garzik * None. 4961c6fd2807SJeff Garzik * 4962c6fd2807SJeff Garzik * RETURNS: 4963b5b3fa38STejun Heo * True if the port online status is available and online. 4964c6fd2807SJeff Garzik */ 4965b1c72916STejun Heo bool ata_phys_link_online(struct ata_link *link) 4966c6fd2807SJeff Garzik { 4967c6fd2807SJeff Garzik u32 sstatus; 4968c6fd2807SJeff Garzik 4969936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 4970936fd732STejun Heo (sstatus & 0xf) == 0x3) 4971b5b3fa38STejun Heo return true; 4972b5b3fa38STejun Heo return false; 4973c6fd2807SJeff Garzik } 4974c6fd2807SJeff Garzik 4975c6fd2807SJeff Garzik /** 4976b1c72916STejun Heo * ata_phys_link_offline - test whether the given link is offline 4977936fd732STejun Heo * @link: ATA link to test 4978c6fd2807SJeff Garzik * 4979936fd732STejun Heo * Test whether @link is offline. Note that this function 4980936fd732STejun Heo * returns 0 if offline status of @link cannot be obtained, so 4981936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 4982c6fd2807SJeff Garzik * 4983c6fd2807SJeff Garzik * LOCKING: 4984c6fd2807SJeff Garzik * None. 4985c6fd2807SJeff Garzik * 4986c6fd2807SJeff Garzik * RETURNS: 4987b5b3fa38STejun Heo * True if the port offline status is available and offline. 4988c6fd2807SJeff Garzik */ 4989b1c72916STejun Heo bool ata_phys_link_offline(struct ata_link *link) 4990c6fd2807SJeff Garzik { 4991c6fd2807SJeff Garzik u32 sstatus; 4992c6fd2807SJeff Garzik 4993936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 4994936fd732STejun Heo (sstatus & 0xf) != 0x3) 4995b5b3fa38STejun Heo return true; 4996b5b3fa38STejun Heo return false; 4997c6fd2807SJeff Garzik } 4998c6fd2807SJeff Garzik 4999b1c72916STejun Heo /** 5000b1c72916STejun Heo * ata_link_online - test whether the given link is online 5001b1c72916STejun Heo * @link: ATA link to test 5002b1c72916STejun Heo * 5003b1c72916STejun Heo * Test whether @link is online. This is identical to 5004b1c72916STejun Heo * ata_phys_link_online() when there's no slave link. When 5005b1c72916STejun Heo * there's a slave link, this function should only be called on 5006b1c72916STejun Heo * the master link and will return true if any of M/S links is 5007b1c72916STejun Heo * online. 5008b1c72916STejun Heo * 5009b1c72916STejun Heo * LOCKING: 5010b1c72916STejun Heo * None. 5011b1c72916STejun Heo * 5012b1c72916STejun Heo * RETURNS: 5013b1c72916STejun Heo * True if the port online status is available and online. 5014b1c72916STejun Heo */ 5015b1c72916STejun Heo bool ata_link_online(struct ata_link *link) 5016b1c72916STejun Heo { 5017b1c72916STejun Heo struct ata_link *slave = link->ap->slave_link; 5018b1c72916STejun Heo 5019b1c72916STejun Heo WARN_ON(link == slave); /* shouldn't be called on slave link */ 5020b1c72916STejun Heo 5021b1c72916STejun Heo return ata_phys_link_online(link) || 5022b1c72916STejun Heo (slave && ata_phys_link_online(slave)); 5023b1c72916STejun Heo } 5024b1c72916STejun Heo 5025b1c72916STejun Heo /** 5026b1c72916STejun Heo * ata_link_offline - test whether the given link is offline 5027b1c72916STejun Heo * @link: ATA link to test 5028b1c72916STejun Heo * 5029b1c72916STejun Heo * Test whether @link is offline. This is identical to 5030b1c72916STejun Heo * ata_phys_link_offline() when there's no slave link. When 5031b1c72916STejun Heo * there's a slave link, this function should only be called on 5032b1c72916STejun Heo * the master link and will return true if both M/S links are 5033b1c72916STejun Heo * offline. 5034b1c72916STejun Heo * 5035b1c72916STejun Heo * LOCKING: 5036b1c72916STejun Heo * None. 5037b1c72916STejun Heo * 5038b1c72916STejun Heo * RETURNS: 5039b1c72916STejun Heo * True if the port offline status is available and offline. 5040b1c72916STejun Heo */ 5041b1c72916STejun Heo bool ata_link_offline(struct ata_link *link) 5042b1c72916STejun Heo { 5043b1c72916STejun Heo struct ata_link *slave = link->ap->slave_link; 5044b1c72916STejun Heo 5045b1c72916STejun Heo WARN_ON(link == slave); /* shouldn't be called on slave link */ 5046b1c72916STejun Heo 5047b1c72916STejun Heo return ata_phys_link_offline(link) && 5048b1c72916STejun Heo (!slave || ata_phys_link_offline(slave)); 5049b1c72916STejun Heo } 5050b1c72916STejun Heo 50516ffa01d8STejun Heo #ifdef CONFIG_PM 5052cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5053cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5054cca3974eSJeff Garzik int wait) 5055c6fd2807SJeff Garzik { 5056c6fd2807SJeff Garzik unsigned long flags; 5057c6fd2807SJeff Garzik int i, rc; 5058c6fd2807SJeff Garzik 5059cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5060cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5061e3667ebfSTejun Heo struct ata_link *link; 5062c6fd2807SJeff Garzik 5063c6fd2807SJeff Garzik /* Previous resume operation might still be in 5064c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5065c6fd2807SJeff Garzik */ 5066c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5067c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5068c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5069c6fd2807SJeff Garzik } 5070c6fd2807SJeff Garzik 5071c6fd2807SJeff Garzik /* request PM ops to EH */ 5072c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5073c6fd2807SJeff Garzik 5074c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5075c6fd2807SJeff Garzik if (wait) { 5076c6fd2807SJeff Garzik rc = 0; 5077c6fd2807SJeff Garzik ap->pm_result = &rc; 5078c6fd2807SJeff Garzik } 5079c6fd2807SJeff Garzik 5080c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5081e3667ebfSTejun Heo __ata_port_for_each_link(link, ap) { 5082e3667ebfSTejun Heo link->eh_info.action |= action; 5083e3667ebfSTejun Heo link->eh_info.flags |= ehi_flags; 5084e3667ebfSTejun Heo } 5085c6fd2807SJeff Garzik 5086c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5087c6fd2807SJeff Garzik 5088c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5089c6fd2807SJeff Garzik 5090c6fd2807SJeff Garzik /* wait and check result */ 5091c6fd2807SJeff Garzik if (wait) { 5092c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5093c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5094c6fd2807SJeff Garzik if (rc) 5095c6fd2807SJeff Garzik return rc; 5096c6fd2807SJeff Garzik } 5097c6fd2807SJeff Garzik } 5098c6fd2807SJeff Garzik 5099c6fd2807SJeff Garzik return 0; 5100c6fd2807SJeff Garzik } 5101c6fd2807SJeff Garzik 5102c6fd2807SJeff Garzik /** 5103cca3974eSJeff Garzik * ata_host_suspend - suspend host 5104cca3974eSJeff Garzik * @host: host to suspend 5105c6fd2807SJeff Garzik * @mesg: PM message 5106c6fd2807SJeff Garzik * 5107cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5108c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5109c6fd2807SJeff Garzik * to finish. 5110c6fd2807SJeff Garzik * 5111c6fd2807SJeff Garzik * LOCKING: 5112c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5113c6fd2807SJeff Garzik * 5114c6fd2807SJeff Garzik * RETURNS: 5115c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5116c6fd2807SJeff Garzik */ 5117cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5118c6fd2807SJeff Garzik { 51199666f400STejun Heo int rc; 5120c6fd2807SJeff Garzik 5121ca77329fSKristen Carlson Accardi /* 5122ca77329fSKristen Carlson Accardi * disable link pm on all ports before requesting 5123ca77329fSKristen Carlson Accardi * any pm activity 5124ca77329fSKristen Carlson Accardi */ 5125ca77329fSKristen Carlson Accardi ata_lpm_enable(host); 5126ca77329fSKristen Carlson Accardi 5127cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 512872ad6ec4SJeff Garzik if (rc == 0) 512972ad6ec4SJeff Garzik host->dev->power.power_state = mesg; 5130c6fd2807SJeff Garzik return rc; 5131c6fd2807SJeff Garzik } 5132c6fd2807SJeff Garzik 5133c6fd2807SJeff Garzik /** 5134cca3974eSJeff Garzik * ata_host_resume - resume host 5135cca3974eSJeff Garzik * @host: host to resume 5136c6fd2807SJeff Garzik * 5137cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5138c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5139c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5140c6fd2807SJeff Garzik * 5141c6fd2807SJeff Garzik * LOCKING: 5142c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5143c6fd2807SJeff Garzik */ 5144cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5145c6fd2807SJeff Garzik { 5146cf480626STejun Heo ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, 5147c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 514872ad6ec4SJeff Garzik host->dev->power.power_state = PMSG_ON; 5149ca77329fSKristen Carlson Accardi 5150ca77329fSKristen Carlson Accardi /* reenable link pm */ 5151ca77329fSKristen Carlson Accardi ata_lpm_disable(host); 5152c6fd2807SJeff Garzik } 51536ffa01d8STejun Heo #endif 5154c6fd2807SJeff Garzik 5155c6fd2807SJeff Garzik /** 5156c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5157c6fd2807SJeff Garzik * @ap: Port to initialize 5158c6fd2807SJeff Garzik * 5159c6fd2807SJeff Garzik * Called just after data structures for each port are 5160c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5161c6fd2807SJeff Garzik * 5162c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5163c6fd2807SJeff Garzik * 5164c6fd2807SJeff Garzik * LOCKING: 5165c6fd2807SJeff Garzik * Inherited from caller. 5166c6fd2807SJeff Garzik */ 5167c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5168c6fd2807SJeff Garzik { 5169c6fd2807SJeff Garzik struct device *dev = ap->dev; 5170c6fd2807SJeff Garzik 5171f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5172f0d36efdSTejun Heo GFP_KERNEL); 5173c6fd2807SJeff Garzik if (!ap->prd) 5174c6fd2807SJeff Garzik return -ENOMEM; 5175c6fd2807SJeff Garzik 5176c6fd2807SJeff Garzik return 0; 5177c6fd2807SJeff Garzik } 5178c6fd2807SJeff Garzik 5179c6fd2807SJeff Garzik /** 5180c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5181c6fd2807SJeff Garzik * @dev: Device structure to initialize 5182c6fd2807SJeff Garzik * 5183c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5184c6fd2807SJeff Garzik * 5185c6fd2807SJeff Garzik * LOCKING: 5186c6fd2807SJeff Garzik * Inherited from caller. 5187c6fd2807SJeff Garzik */ 5188c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5189c6fd2807SJeff Garzik { 5190b1c72916STejun Heo struct ata_link *link = ata_dev_phys_link(dev); 51919af5c9c9STejun Heo struct ata_port *ap = link->ap; 5192c6fd2807SJeff Garzik unsigned long flags; 5193c6fd2807SJeff Garzik 5194b1c72916STejun Heo /* SATA spd limit is bound to the attached device, reset together */ 51959af5c9c9STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 51969af5c9c9STejun Heo link->sata_spd = 0; 5197c6fd2807SJeff Garzik 5198c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5199c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5200cca3974eSJeff Garzik * host lock. 5201c6fd2807SJeff Garzik */ 5202c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5203c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 52043dcc323fSTejun Heo dev->horkage = 0; 5205c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5206c6fd2807SJeff Garzik 5207c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 5208c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 5209c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 5210c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 5211c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 5212c6fd2807SJeff Garzik } 5213c6fd2807SJeff Garzik 5214c6fd2807SJeff Garzik /** 52154fb37a25STejun Heo * ata_link_init - Initialize an ata_link structure 52164fb37a25STejun Heo * @ap: ATA port link is attached to 52174fb37a25STejun Heo * @link: Link structure to initialize 52188989805dSTejun Heo * @pmp: Port multiplier port number 52194fb37a25STejun Heo * 52204fb37a25STejun Heo * Initialize @link. 52214fb37a25STejun Heo * 52224fb37a25STejun Heo * LOCKING: 52234fb37a25STejun Heo * Kernel thread context (may sleep) 52244fb37a25STejun Heo */ 5225fb7fd614STejun Heo void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 52264fb37a25STejun Heo { 52274fb37a25STejun Heo int i; 52284fb37a25STejun Heo 52294fb37a25STejun Heo /* clear everything except for devices */ 52304fb37a25STejun Heo memset(link, 0, offsetof(struct ata_link, device[0])); 52314fb37a25STejun Heo 52324fb37a25STejun Heo link->ap = ap; 52338989805dSTejun Heo link->pmp = pmp; 52344fb37a25STejun Heo link->active_tag = ATA_TAG_POISON; 52354fb37a25STejun Heo link->hw_sata_spd_limit = UINT_MAX; 52364fb37a25STejun Heo 52374fb37a25STejun Heo /* can't use iterator, ap isn't initialized yet */ 52384fb37a25STejun Heo for (i = 0; i < ATA_MAX_DEVICES; i++) { 52394fb37a25STejun Heo struct ata_device *dev = &link->device[i]; 52404fb37a25STejun Heo 52414fb37a25STejun Heo dev->link = link; 52424fb37a25STejun Heo dev->devno = dev - link->device; 52434fb37a25STejun Heo ata_dev_init(dev); 52444fb37a25STejun Heo } 52454fb37a25STejun Heo } 52464fb37a25STejun Heo 52474fb37a25STejun Heo /** 52484fb37a25STejun Heo * sata_link_init_spd - Initialize link->sata_spd_limit 52494fb37a25STejun Heo * @link: Link to configure sata_spd_limit for 52504fb37a25STejun Heo * 52514fb37a25STejun Heo * Initialize @link->[hw_]sata_spd_limit to the currently 52524fb37a25STejun Heo * configured value. 52534fb37a25STejun Heo * 52544fb37a25STejun Heo * LOCKING: 52554fb37a25STejun Heo * Kernel thread context (may sleep). 52564fb37a25STejun Heo * 52574fb37a25STejun Heo * RETURNS: 52584fb37a25STejun Heo * 0 on success, -errno on failure. 52594fb37a25STejun Heo */ 5260fb7fd614STejun Heo int sata_link_init_spd(struct ata_link *link) 52614fb37a25STejun Heo { 526233267325STejun Heo u8 spd; 52634fb37a25STejun Heo int rc; 52644fb37a25STejun Heo 5265d127ea7bSTejun Heo rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 52664fb37a25STejun Heo if (rc) 52674fb37a25STejun Heo return rc; 52684fb37a25STejun Heo 5269d127ea7bSTejun Heo spd = (link->saved_scontrol >> 4) & 0xf; 52704fb37a25STejun Heo if (spd) 52714fb37a25STejun Heo link->hw_sata_spd_limit &= (1 << spd) - 1; 52724fb37a25STejun Heo 527305944bdfSTejun Heo ata_force_link_limits(link); 527433267325STejun Heo 52754fb37a25STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 52764fb37a25STejun Heo 52774fb37a25STejun Heo return 0; 52784fb37a25STejun Heo } 52794fb37a25STejun Heo 52804fb37a25STejun Heo /** 5281f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 5282f3187195STejun Heo * @host: ATA host this allocated port belongs to 5283c6fd2807SJeff Garzik * 5284f3187195STejun Heo * Allocate and initialize basic ATA port resources. 5285f3187195STejun Heo * 5286f3187195STejun Heo * RETURNS: 5287f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 5288c6fd2807SJeff Garzik * 5289c6fd2807SJeff Garzik * LOCKING: 5290f3187195STejun Heo * Inherited from calling layer (may sleep). 5291c6fd2807SJeff Garzik */ 5292f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 5293c6fd2807SJeff Garzik { 5294f3187195STejun Heo struct ata_port *ap; 5295c6fd2807SJeff Garzik 5296f3187195STejun Heo DPRINTK("ENTER\n"); 5297f3187195STejun Heo 5298f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 5299f3187195STejun Heo if (!ap) 5300f3187195STejun Heo return NULL; 5301f3187195STejun Heo 5302f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 5303cca3974eSJeff Garzik ap->lock = &host->lock; 5304c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 5305f3187195STejun Heo ap->print_id = -1; 5306c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 5307cca3974eSJeff Garzik ap->host = host; 5308f3187195STejun Heo ap->dev = host->dev; 5309c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 5310c6fd2807SJeff Garzik 5311c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 5312c6fd2807SJeff Garzik /* turn on all debugging levels */ 5313c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 5314c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 5315c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5316c6fd2807SJeff Garzik #else 5317c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5318c6fd2807SJeff Garzik #endif 5319c6fd2807SJeff Garzik 5320127102aeSTejun Heo #ifdef CONFIG_ATA_SFF 5321442eacc3SJeff Garzik INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); 5322f667fdbbSTejun Heo #else 5323f667fdbbSTejun Heo INIT_DELAYED_WORK(&ap->port_task, NULL); 5324127102aeSTejun Heo #endif 532565f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 532665f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5327c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 5328c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 532945fabbb7SElias Oltmanns init_completion(&ap->park_req_pending); 53305ddf24c5STejun Heo init_timer_deferrable(&ap->fastdrain_timer); 53315ddf24c5STejun Heo ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 53325ddf24c5STejun Heo ap->fastdrain_timer.data = (unsigned long)ap; 5333c6fd2807SJeff Garzik 5334c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 5335c6fd2807SJeff Garzik 53368989805dSTejun Heo ata_link_init(ap, &ap->link, 0); 5337c6fd2807SJeff Garzik 5338c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5339c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 5340c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 5341c6fd2807SJeff Garzik #endif 5342c6fd2807SJeff Garzik return ap; 5343c6fd2807SJeff Garzik } 5344c6fd2807SJeff Garzik 5345f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 5346f0d36efdSTejun Heo { 5347f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 5348f0d36efdSTejun Heo int i; 5349f0d36efdSTejun Heo 5350f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 5351f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 5352f0d36efdSTejun Heo 5353ecef7253STejun Heo if (!ap) 5354ecef7253STejun Heo continue; 5355ecef7253STejun Heo 53564911487aSTejun Heo if (ap->scsi_host) 53571aa506e4STejun Heo scsi_host_put(ap->scsi_host); 53581aa506e4STejun Heo 5359633273a3STejun Heo kfree(ap->pmp_link); 5360b1c72916STejun Heo kfree(ap->slave_link); 53614911487aSTejun Heo kfree(ap); 53621aa506e4STejun Heo host->ports[i] = NULL; 53631aa506e4STejun Heo } 53641aa506e4STejun Heo 53651aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 5366f0d36efdSTejun Heo } 5367f0d36efdSTejun Heo 5368c6fd2807SJeff Garzik /** 5369f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 5370f3187195STejun Heo * @dev: generic device this host is associated with 5371f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 5372f3187195STejun Heo * 5373f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 5374f3187195STejun Heo * this function to allocate a host, initializes it fully and 5375f3187195STejun Heo * attaches it using ata_host_register(). 5376f3187195STejun Heo * 5377f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 5378f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 5379f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 5380f3187195STejun Heo * ports will be automatically freed on registration. 5381f3187195STejun Heo * 5382f3187195STejun Heo * RETURNS: 5383f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 5384f3187195STejun Heo * 5385f3187195STejun Heo * LOCKING: 5386f3187195STejun Heo * Inherited from calling layer (may sleep). 5387f3187195STejun Heo */ 5388f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 5389f3187195STejun Heo { 5390f3187195STejun Heo struct ata_host *host; 5391f3187195STejun Heo size_t sz; 5392f3187195STejun Heo int i; 5393f3187195STejun Heo 5394f3187195STejun Heo DPRINTK("ENTER\n"); 5395f3187195STejun Heo 5396f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 5397f3187195STejun Heo return NULL; 5398f3187195STejun Heo 5399f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 5400f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 5401f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 5402f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 5403f3187195STejun Heo if (!host) 5404f3187195STejun Heo goto err_out; 5405f3187195STejun Heo 5406f3187195STejun Heo devres_add(dev, host); 5407f3187195STejun Heo dev_set_drvdata(dev, host); 5408f3187195STejun Heo 5409f3187195STejun Heo spin_lock_init(&host->lock); 5410f3187195STejun Heo host->dev = dev; 5411f3187195STejun Heo host->n_ports = max_ports; 5412f3187195STejun Heo 5413f3187195STejun Heo /* allocate ports bound to this host */ 5414f3187195STejun Heo for (i = 0; i < max_ports; i++) { 5415f3187195STejun Heo struct ata_port *ap; 5416f3187195STejun Heo 5417f3187195STejun Heo ap = ata_port_alloc(host); 5418f3187195STejun Heo if (!ap) 5419f3187195STejun Heo goto err_out; 5420f3187195STejun Heo 5421f3187195STejun Heo ap->port_no = i; 5422f3187195STejun Heo host->ports[i] = ap; 5423f3187195STejun Heo } 5424f3187195STejun Heo 5425f3187195STejun Heo devres_remove_group(dev, NULL); 5426f3187195STejun Heo return host; 5427f3187195STejun Heo 5428f3187195STejun Heo err_out: 5429f3187195STejun Heo devres_release_group(dev, NULL); 5430f3187195STejun Heo return NULL; 5431f3187195STejun Heo } 5432f3187195STejun Heo 5433f3187195STejun Heo /** 5434f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 5435f5cda257STejun Heo * @dev: generic device this host is associated with 5436f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 5437f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 5438f5cda257STejun Heo * 5439f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 5440f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 5441f5cda257STejun Heo * last entry will be used for the remaining ports. 5442f5cda257STejun Heo * 5443f5cda257STejun Heo * RETURNS: 5444f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 5445f5cda257STejun Heo * 5446f5cda257STejun Heo * LOCKING: 5447f5cda257STejun Heo * Inherited from calling layer (may sleep). 5448f5cda257STejun Heo */ 5449f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5450f5cda257STejun Heo const struct ata_port_info * const * ppi, 5451f5cda257STejun Heo int n_ports) 5452f5cda257STejun Heo { 5453f5cda257STejun Heo const struct ata_port_info *pi; 5454f5cda257STejun Heo struct ata_host *host; 5455f5cda257STejun Heo int i, j; 5456f5cda257STejun Heo 5457f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 5458f5cda257STejun Heo if (!host) 5459f5cda257STejun Heo return NULL; 5460f5cda257STejun Heo 5461f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 5462f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 5463f5cda257STejun Heo 5464f5cda257STejun Heo if (ppi[j]) 5465f5cda257STejun Heo pi = ppi[j++]; 5466f5cda257STejun Heo 5467f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 5468f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 5469f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 5470f5cda257STejun Heo ap->flags |= pi->flags; 54710c88758bSTejun Heo ap->link.flags |= pi->link_flags; 5472f5cda257STejun Heo ap->ops = pi->port_ops; 5473f5cda257STejun Heo 5474f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5475f5cda257STejun Heo host->ops = pi->port_ops; 5476f5cda257STejun Heo } 5477f5cda257STejun Heo 5478f5cda257STejun Heo return host; 5479f5cda257STejun Heo } 5480f5cda257STejun Heo 5481b1c72916STejun Heo /** 5482b1c72916STejun Heo * ata_slave_link_init - initialize slave link 5483b1c72916STejun Heo * @ap: port to initialize slave link for 5484b1c72916STejun Heo * 5485b1c72916STejun Heo * Create and initialize slave link for @ap. This enables slave 5486b1c72916STejun Heo * link handling on the port. 5487b1c72916STejun Heo * 5488b1c72916STejun Heo * In libata, a port contains links and a link contains devices. 5489b1c72916STejun Heo * There is single host link but if a PMP is attached to it, 5490b1c72916STejun Heo * there can be multiple fan-out links. On SATA, there's usually 5491b1c72916STejun Heo * a single device connected to a link but PATA and SATA 5492b1c72916STejun Heo * controllers emulating TF based interface can have two - master 5493b1c72916STejun Heo * and slave. 5494b1c72916STejun Heo * 5495b1c72916STejun Heo * However, there are a few controllers which don't fit into this 5496b1c72916STejun Heo * abstraction too well - SATA controllers which emulate TF 5497b1c72916STejun Heo * interface with both master and slave devices but also have 5498b1c72916STejun Heo * separate SCR register sets for each device. These controllers 5499b1c72916STejun Heo * need separate links for physical link handling 5500b1c72916STejun Heo * (e.g. onlineness, link speed) but should be treated like a 5501b1c72916STejun Heo * traditional M/S controller for everything else (e.g. command 5502b1c72916STejun Heo * issue, softreset). 5503b1c72916STejun Heo * 5504b1c72916STejun Heo * slave_link is libata's way of handling this class of 5505b1c72916STejun Heo * controllers without impacting core layer too much. For 5506b1c72916STejun Heo * anything other than physical link handling, the default host 5507b1c72916STejun Heo * link is used for both master and slave. For physical link 5508b1c72916STejun Heo * handling, separate @ap->slave_link is used. All dirty details 5509b1c72916STejun Heo * are implemented inside libata core layer. From LLD's POV, the 5510b1c72916STejun Heo * only difference is that prereset, hardreset and postreset are 5511b1c72916STejun Heo * called once more for the slave link, so the reset sequence 5512b1c72916STejun Heo * looks like the following. 5513b1c72916STejun Heo * 5514b1c72916STejun Heo * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> 5515b1c72916STejun Heo * softreset(M) -> postreset(M) -> postreset(S) 5516b1c72916STejun Heo * 5517b1c72916STejun Heo * Note that softreset is called only for the master. Softreset 5518b1c72916STejun Heo * resets both M/S by definition, so SRST on master should handle 5519b1c72916STejun Heo * both (the standard method will work just fine). 5520b1c72916STejun Heo * 5521b1c72916STejun Heo * LOCKING: 5522b1c72916STejun Heo * Should be called before host is registered. 5523b1c72916STejun Heo * 5524b1c72916STejun Heo * RETURNS: 5525b1c72916STejun Heo * 0 on success, -errno on failure. 5526b1c72916STejun Heo */ 5527b1c72916STejun Heo int ata_slave_link_init(struct ata_port *ap) 5528b1c72916STejun Heo { 5529b1c72916STejun Heo struct ata_link *link; 5530b1c72916STejun Heo 5531b1c72916STejun Heo WARN_ON(ap->slave_link); 5532b1c72916STejun Heo WARN_ON(ap->flags & ATA_FLAG_PMP); 5533b1c72916STejun Heo 5534b1c72916STejun Heo link = kzalloc(sizeof(*link), GFP_KERNEL); 5535b1c72916STejun Heo if (!link) 5536b1c72916STejun Heo return -ENOMEM; 5537b1c72916STejun Heo 5538b1c72916STejun Heo ata_link_init(ap, link, 1); 5539b1c72916STejun Heo ap->slave_link = link; 5540b1c72916STejun Heo return 0; 5541b1c72916STejun Heo } 5542b1c72916STejun Heo 554332ebbc0cSTejun Heo static void ata_host_stop(struct device *gendev, void *res) 554432ebbc0cSTejun Heo { 554532ebbc0cSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 554632ebbc0cSTejun Heo int i; 554732ebbc0cSTejun Heo 554832ebbc0cSTejun Heo WARN_ON(!(host->flags & ATA_HOST_STARTED)); 554932ebbc0cSTejun Heo 555032ebbc0cSTejun Heo for (i = 0; i < host->n_ports; i++) { 555132ebbc0cSTejun Heo struct ata_port *ap = host->ports[i]; 555232ebbc0cSTejun Heo 555332ebbc0cSTejun Heo if (ap->ops->port_stop) 555432ebbc0cSTejun Heo ap->ops->port_stop(ap); 555532ebbc0cSTejun Heo } 555632ebbc0cSTejun Heo 555732ebbc0cSTejun Heo if (host->ops->host_stop) 555832ebbc0cSTejun Heo host->ops->host_stop(host); 555932ebbc0cSTejun Heo } 556032ebbc0cSTejun Heo 5561f5cda257STejun Heo /** 5562029cfd6bSTejun Heo * ata_finalize_port_ops - finalize ata_port_operations 5563029cfd6bSTejun Heo * @ops: ata_port_operations to finalize 5564029cfd6bSTejun Heo * 5565029cfd6bSTejun Heo * An ata_port_operations can inherit from another ops and that 5566029cfd6bSTejun Heo * ops can again inherit from another. This can go on as many 5567029cfd6bSTejun Heo * times as necessary as long as there is no loop in the 5568029cfd6bSTejun Heo * inheritance chain. 5569029cfd6bSTejun Heo * 5570029cfd6bSTejun Heo * Ops tables are finalized when the host is started. NULL or 5571029cfd6bSTejun Heo * unspecified entries are inherited from the closet ancestor 5572029cfd6bSTejun Heo * which has the method and the entry is populated with it. 5573029cfd6bSTejun Heo * After finalization, the ops table directly points to all the 5574029cfd6bSTejun Heo * methods and ->inherits is no longer necessary and cleared. 5575029cfd6bSTejun Heo * 5576029cfd6bSTejun Heo * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 5577029cfd6bSTejun Heo * 5578029cfd6bSTejun Heo * LOCKING: 5579029cfd6bSTejun Heo * None. 5580029cfd6bSTejun Heo */ 5581029cfd6bSTejun Heo static void ata_finalize_port_ops(struct ata_port_operations *ops) 5582029cfd6bSTejun Heo { 55832da67659SPradeep Singh Rautela static DEFINE_SPINLOCK(lock); 5584029cfd6bSTejun Heo const struct ata_port_operations *cur; 5585029cfd6bSTejun Heo void **begin = (void **)ops; 5586029cfd6bSTejun Heo void **end = (void **)&ops->inherits; 5587029cfd6bSTejun Heo void **pp; 5588029cfd6bSTejun Heo 5589029cfd6bSTejun Heo if (!ops || !ops->inherits) 5590029cfd6bSTejun Heo return; 5591029cfd6bSTejun Heo 5592029cfd6bSTejun Heo spin_lock(&lock); 5593029cfd6bSTejun Heo 5594029cfd6bSTejun Heo for (cur = ops->inherits; cur; cur = cur->inherits) { 5595029cfd6bSTejun Heo void **inherit = (void **)cur; 5596029cfd6bSTejun Heo 5597029cfd6bSTejun Heo for (pp = begin; pp < end; pp++, inherit++) 5598029cfd6bSTejun Heo if (!*pp) 5599029cfd6bSTejun Heo *pp = *inherit; 5600029cfd6bSTejun Heo } 5601029cfd6bSTejun Heo 5602029cfd6bSTejun Heo for (pp = begin; pp < end; pp++) 5603029cfd6bSTejun Heo if (IS_ERR(*pp)) 5604029cfd6bSTejun Heo *pp = NULL; 5605029cfd6bSTejun Heo 5606029cfd6bSTejun Heo ops->inherits = NULL; 5607029cfd6bSTejun Heo 5608029cfd6bSTejun Heo spin_unlock(&lock); 5609029cfd6bSTejun Heo } 5610029cfd6bSTejun Heo 5611029cfd6bSTejun Heo /** 5612ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 5613ecef7253STejun Heo * @host: ATA host to start ports for 5614ecef7253STejun Heo * 5615ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 5616ecef7253STejun Heo * recorded in host->flags, so this function can be called 5617ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 5618f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 5619f3187195STejun Heo * first non-dummy port ops. 5620ecef7253STejun Heo * 5621ecef7253STejun Heo * LOCKING: 5622ecef7253STejun Heo * Inherited from calling layer (may sleep). 5623ecef7253STejun Heo * 5624ecef7253STejun Heo * RETURNS: 5625ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 5626ecef7253STejun Heo */ 5627ecef7253STejun Heo int ata_host_start(struct ata_host *host) 5628ecef7253STejun Heo { 562932ebbc0cSTejun Heo int have_stop = 0; 563032ebbc0cSTejun Heo void *start_dr = NULL; 5631ecef7253STejun Heo int i, rc; 5632ecef7253STejun Heo 5633ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 5634ecef7253STejun Heo return 0; 5635ecef7253STejun Heo 5636029cfd6bSTejun Heo ata_finalize_port_ops(host->ops); 5637029cfd6bSTejun Heo 5638ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 5639ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 5640ecef7253STejun Heo 5641029cfd6bSTejun Heo ata_finalize_port_ops(ap->ops); 5642029cfd6bSTejun Heo 5643f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 5644f3187195STejun Heo host->ops = ap->ops; 5645f3187195STejun Heo 564632ebbc0cSTejun Heo if (ap->ops->port_stop) 564732ebbc0cSTejun Heo have_stop = 1; 564832ebbc0cSTejun Heo } 564932ebbc0cSTejun Heo 565032ebbc0cSTejun Heo if (host->ops->host_stop) 565132ebbc0cSTejun Heo have_stop = 1; 565232ebbc0cSTejun Heo 565332ebbc0cSTejun Heo if (have_stop) { 565432ebbc0cSTejun Heo start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 565532ebbc0cSTejun Heo if (!start_dr) 565632ebbc0cSTejun Heo return -ENOMEM; 565732ebbc0cSTejun Heo } 565832ebbc0cSTejun Heo 565932ebbc0cSTejun Heo for (i = 0; i < host->n_ports; i++) { 566032ebbc0cSTejun Heo struct ata_port *ap = host->ports[i]; 566132ebbc0cSTejun Heo 5662ecef7253STejun Heo if (ap->ops->port_start) { 5663ecef7253STejun Heo rc = ap->ops->port_start(ap); 5664ecef7253STejun Heo if (rc) { 56650f9fe9b7SAlan Cox if (rc != -ENODEV) 56660f757743SAndrew Morton dev_printk(KERN_ERR, host->dev, 56670f757743SAndrew Morton "failed to start port %d " 56680f757743SAndrew Morton "(errno=%d)\n", i, rc); 5669ecef7253STejun Heo goto err_out; 5670ecef7253STejun Heo } 5671ecef7253STejun Heo } 5672ecef7253STejun Heo ata_eh_freeze_port(ap); 5673ecef7253STejun Heo } 5674ecef7253STejun Heo 567532ebbc0cSTejun Heo if (start_dr) 567632ebbc0cSTejun Heo devres_add(host->dev, start_dr); 5677ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 5678ecef7253STejun Heo return 0; 5679ecef7253STejun Heo 5680ecef7253STejun Heo err_out: 5681ecef7253STejun Heo while (--i >= 0) { 5682ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 5683ecef7253STejun Heo 5684ecef7253STejun Heo if (ap->ops->port_stop) 5685ecef7253STejun Heo ap->ops->port_stop(ap); 5686ecef7253STejun Heo } 568732ebbc0cSTejun Heo devres_free(start_dr); 5688ecef7253STejun Heo return rc; 5689ecef7253STejun Heo } 5690ecef7253STejun Heo 5691ecef7253STejun Heo /** 5692cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 5693cca3974eSJeff Garzik * @host: host to initialize 5694cca3974eSJeff Garzik * @dev: device host is attached to 5695cca3974eSJeff Garzik * @flags: host flags 5696c6fd2807SJeff Garzik * @ops: port_ops 5697c6fd2807SJeff Garzik * 5698c6fd2807SJeff Garzik * LOCKING: 5699c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5700c6fd2807SJeff Garzik * 5701c6fd2807SJeff Garzik */ 5702f3187195STejun Heo /* KILLME - the only user left is ipr */ 5703cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 5704029cfd6bSTejun Heo unsigned long flags, struct ata_port_operations *ops) 5705c6fd2807SJeff Garzik { 5706cca3974eSJeff Garzik spin_lock_init(&host->lock); 5707cca3974eSJeff Garzik host->dev = dev; 5708cca3974eSJeff Garzik host->flags = flags; 5709cca3974eSJeff Garzik host->ops = ops; 5710c6fd2807SJeff Garzik } 5711c6fd2807SJeff Garzik 5712c6fd2807SJeff Garzik /** 5713f3187195STejun Heo * ata_host_register - register initialized ATA host 5714f3187195STejun Heo * @host: ATA host to register 5715f3187195STejun Heo * @sht: template for SCSI host 5716c6fd2807SJeff Garzik * 5717f3187195STejun Heo * Register initialized ATA host. @host is allocated using 5718f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 5719f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 5720f3187195STejun Heo * probe registered devices. 5721c6fd2807SJeff Garzik * 5722c6fd2807SJeff Garzik * LOCKING: 5723f3187195STejun Heo * Inherited from calling layer (may sleep). 5724c6fd2807SJeff Garzik * 5725c6fd2807SJeff Garzik * RETURNS: 5726f3187195STejun Heo * 0 on success, -errno otherwise. 5727c6fd2807SJeff Garzik */ 5728f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 5729c6fd2807SJeff Garzik { 5730f3187195STejun Heo int i, rc; 5731c6fd2807SJeff Garzik 5732f3187195STejun Heo /* host must have been started */ 5733f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 5734f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 5735f3187195STejun Heo "BUG: trying to register unstarted host\n"); 5736f3187195STejun Heo WARN_ON(1); 5737f3187195STejun Heo return -EINVAL; 573802f076aaSAlan Cox } 5739f0d36efdSTejun Heo 5740f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 5741f3187195STejun Heo * determine the exact number of ports to allocate at 5742f3187195STejun Heo * allocation time. 5743f3187195STejun Heo */ 5744f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 5745f3187195STejun Heo kfree(host->ports[i]); 5746f0d36efdSTejun Heo 5747f3187195STejun Heo /* give ports names and add SCSI hosts */ 5748f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 5749f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 5750c6fd2807SJeff Garzik 5751f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 5752ecef7253STejun Heo if (rc) 5753f3187195STejun Heo return rc; 5754ecef7253STejun Heo 5755fafbae87STejun Heo /* associate with ACPI nodes */ 5756fafbae87STejun Heo ata_acpi_associate(host); 5757fafbae87STejun Heo 5758f3187195STejun Heo /* set cable, sata_spd_limit and report */ 5759cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5760cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5761f3187195STejun Heo unsigned long xfer_mask; 5762f3187195STejun Heo 5763f3187195STejun Heo /* set SATA cable type if still unset */ 5764f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 5765f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 5766c6fd2807SJeff Garzik 5767c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 57684fb37a25STejun Heo sata_link_init_spd(&ap->link); 5769b1c72916STejun Heo if (ap->slave_link) 5770b1c72916STejun Heo sata_link_init_spd(ap->slave_link); 5771c6fd2807SJeff Garzik 5772cbcdd875STejun Heo /* print per-port info to dmesg */ 5773f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 5774f3187195STejun Heo ap->udma_mask); 5775f3187195STejun Heo 5776abf6e8edSTejun Heo if (!ata_port_is_dummy(ap)) { 5777cbcdd875STejun Heo ata_port_printk(ap, KERN_INFO, 5778cbcdd875STejun Heo "%cATA max %s %s\n", 5779a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 5780f3187195STejun Heo ata_mode_string(xfer_mask), 5781cbcdd875STejun Heo ap->link.eh_info.desc); 5782abf6e8edSTejun Heo ata_ehi_clear_desc(&ap->link.eh_info); 5783abf6e8edSTejun Heo } else 5784f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 5785c6fd2807SJeff Garzik } 5786c6fd2807SJeff Garzik 5787f3187195STejun Heo /* perform each probe synchronously */ 5788f3187195STejun Heo DPRINTK("probe begin\n"); 5789f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 5790f3187195STejun Heo struct ata_port *ap = host->ports[i]; 5791f3187195STejun Heo 5792f3187195STejun Heo /* probe */ 5793c6fd2807SJeff Garzik if (ap->ops->error_handler) { 57949af5c9c9STejun Heo struct ata_eh_info *ehi = &ap->link.eh_info; 5795c6fd2807SJeff Garzik unsigned long flags; 5796c6fd2807SJeff Garzik 5797c6fd2807SJeff Garzik ata_port_probe(ap); 5798c6fd2807SJeff Garzik 5799c6fd2807SJeff Garzik /* kick EH for boot probing */ 5800c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5801c6fd2807SJeff Garzik 5802b558edddSTejun Heo ehi->probe_mask |= ATA_ALL_DEVICES; 5803391191c1STejun Heo ehi->action |= ATA_EH_RESET | ATA_EH_LPM; 5804c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5805c6fd2807SJeff Garzik 5806f4d6d004STejun Heo ap->pflags &= ~ATA_PFLAG_INITIALIZING; 5807c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 5808c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5809c6fd2807SJeff Garzik 5810c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5811c6fd2807SJeff Garzik 5812c6fd2807SJeff Garzik /* wait for EH to finish */ 5813c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5814c6fd2807SJeff Garzik } else { 581544877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 5816c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 581744877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 5818c6fd2807SJeff Garzik 5819c6fd2807SJeff Garzik if (rc) { 5820c6fd2807SJeff Garzik /* FIXME: do something useful here? 5821c6fd2807SJeff Garzik * Current libata behavior will 5822c6fd2807SJeff Garzik * tear down everything when 5823c6fd2807SJeff Garzik * the module is removed 5824c6fd2807SJeff Garzik * or the h/w is unplugged. 5825c6fd2807SJeff Garzik */ 5826c6fd2807SJeff Garzik } 5827c6fd2807SJeff Garzik } 5828c6fd2807SJeff Garzik } 5829c6fd2807SJeff Garzik 5830c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 5831c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 5832cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5833cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5834c6fd2807SJeff Garzik 58351ae46317STejun Heo ata_scsi_scan_host(ap, 1); 5836c6fd2807SJeff Garzik } 5837c6fd2807SJeff Garzik 5838f3187195STejun Heo return 0; 5839f3187195STejun Heo } 5840f3187195STejun Heo 5841f3187195STejun Heo /** 5842f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 5843f5cda257STejun Heo * @host: target ATA host 5844f5cda257STejun Heo * @irq: IRQ to request 5845f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 5846f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 5847f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 5848f5cda257STejun Heo * 5849f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 5850f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 5851f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 5852f5cda257STejun Heo * arguments and performs the three steps in one go. 5853f5cda257STejun Heo * 58543d46b2e2SPaul Mundt * An invalid IRQ skips the IRQ registration and expects the host to 58553d46b2e2SPaul Mundt * have set polling mode on the port. In this case, @irq_handler 58563d46b2e2SPaul Mundt * should be NULL. 58573d46b2e2SPaul Mundt * 5858f5cda257STejun Heo * LOCKING: 5859f5cda257STejun Heo * Inherited from calling layer (may sleep). 5860f5cda257STejun Heo * 5861f5cda257STejun Heo * RETURNS: 5862f5cda257STejun Heo * 0 on success, -errno otherwise. 5863f5cda257STejun Heo */ 5864f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 5865f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 5866f5cda257STejun Heo struct scsi_host_template *sht) 5867f5cda257STejun Heo { 5868cbcdd875STejun Heo int i, rc; 5869f5cda257STejun Heo 5870f5cda257STejun Heo rc = ata_host_start(host); 5871f5cda257STejun Heo if (rc) 5872f5cda257STejun Heo return rc; 5873f5cda257STejun Heo 58743d46b2e2SPaul Mundt /* Special case for polling mode */ 58753d46b2e2SPaul Mundt if (!irq) { 58763d46b2e2SPaul Mundt WARN_ON(irq_handler); 58773d46b2e2SPaul Mundt return ata_host_register(host, sht); 58783d46b2e2SPaul Mundt } 58793d46b2e2SPaul Mundt 5880f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 5881f5cda257STejun Heo dev_driver_string(host->dev), host); 5882f5cda257STejun Heo if (rc) 5883f5cda257STejun Heo return rc; 5884f5cda257STejun Heo 5885cbcdd875STejun Heo for (i = 0; i < host->n_ports; i++) 5886cbcdd875STejun Heo ata_port_desc(host->ports[i], "irq %d", irq); 58874031826bSTejun Heo 5888f5cda257STejun Heo rc = ata_host_register(host, sht); 5889f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 5890f5cda257STejun Heo if (rc) 5891f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 5892f5cda257STejun Heo 5893f5cda257STejun Heo return rc; 5894f5cda257STejun Heo } 5895f5cda257STejun Heo 5896f5cda257STejun Heo /** 5897c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 5898c6fd2807SJeff Garzik * @ap: ATA port to be detached 5899c6fd2807SJeff Garzik * 5900c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 5901c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 5902c6fd2807SJeff Garzik * be quiescent on return from this function. 5903c6fd2807SJeff Garzik * 5904c6fd2807SJeff Garzik * LOCKING: 5905c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5906c6fd2807SJeff Garzik */ 5907741b7763SAdrian Bunk static void ata_port_detach(struct ata_port *ap) 5908c6fd2807SJeff Garzik { 5909c6fd2807SJeff Garzik unsigned long flags; 591041bda9c9STejun Heo struct ata_link *link; 5911f58229f8STejun Heo struct ata_device *dev; 5912c6fd2807SJeff Garzik 5913c6fd2807SJeff Garzik if (!ap->ops->error_handler) 5914c6fd2807SJeff Garzik goto skip_eh; 5915c6fd2807SJeff Garzik 5916c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 5917c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5918c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 5919c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5920c6fd2807SJeff Garzik 5921c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5922c6fd2807SJeff Garzik 59237f9ad9b8STejun Heo /* EH is now guaranteed to see UNLOADING - EH context belongs 5924d127ea7bSTejun Heo * to us. Restore SControl and disable all existing devices. 5925c6fd2807SJeff Garzik */ 5926d127ea7bSTejun Heo __ata_port_for_each_link(link, ap) { 5927d127ea7bSTejun Heo sata_scr_write(link, SCR_CONTROL, link->saved_scontrol); 592841bda9c9STejun Heo ata_link_for_each_dev(dev, link) 5929f58229f8STejun Heo ata_dev_disable(dev); 593041bda9c9STejun Heo } 5931c6fd2807SJeff Garzik 5932c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 5933c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 5934c6fd2807SJeff Garzik * target. 5935c6fd2807SJeff Garzik */ 5936c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5937c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 5938c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5939c6fd2807SJeff Garzik 5940c6fd2807SJeff Garzik ata_port_wait_eh(ap); 594145a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 5942c6fd2807SJeff Garzik 5943c6fd2807SJeff Garzik skip_eh: 5944c6fd2807SJeff Garzik /* remove the associated SCSI host */ 5945cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 5946c6fd2807SJeff Garzik } 5947c6fd2807SJeff Garzik 5948c6fd2807SJeff Garzik /** 59490529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 59500529c159STejun Heo * @host: Host to detach 59510529c159STejun Heo * 59520529c159STejun Heo * Detach all ports of @host. 59530529c159STejun Heo * 59540529c159STejun Heo * LOCKING: 59550529c159STejun Heo * Kernel thread context (may sleep). 59560529c159STejun Heo */ 59570529c159STejun Heo void ata_host_detach(struct ata_host *host) 59580529c159STejun Heo { 59590529c159STejun Heo int i; 59600529c159STejun Heo 59610529c159STejun Heo for (i = 0; i < host->n_ports; i++) 59620529c159STejun Heo ata_port_detach(host->ports[i]); 5963562f0c2dSTejun Heo 5964562f0c2dSTejun Heo /* the host is dead now, dissociate ACPI */ 5965562f0c2dSTejun Heo ata_acpi_dissociate(host); 59660529c159STejun Heo } 59670529c159STejun Heo 5968c6fd2807SJeff Garzik #ifdef CONFIG_PCI 5969c6fd2807SJeff Garzik 5970c6fd2807SJeff Garzik /** 5971c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 5972c6fd2807SJeff Garzik * @pdev: PCI device that was removed 5973c6fd2807SJeff Garzik * 5974b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 5975b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 5976b878ca5dSTejun Heo * release is handled via devres. 5977c6fd2807SJeff Garzik * 5978c6fd2807SJeff Garzik * LOCKING: 5979c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 5980c6fd2807SJeff Garzik */ 5981c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 5982c6fd2807SJeff Garzik { 59832855568bSJeff Garzik struct device *dev = &pdev->dev; 5984cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 5985c6fd2807SJeff Garzik 5986f0d36efdSTejun Heo ata_host_detach(host); 5987c6fd2807SJeff Garzik } 5988c6fd2807SJeff Garzik 5989c6fd2807SJeff Garzik /* move to PCI subsystem */ 5990c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 5991c6fd2807SJeff Garzik { 5992c6fd2807SJeff Garzik unsigned long tmp = 0; 5993c6fd2807SJeff Garzik 5994c6fd2807SJeff Garzik switch (bits->width) { 5995c6fd2807SJeff Garzik case 1: { 5996c6fd2807SJeff Garzik u8 tmp8 = 0; 5997c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 5998c6fd2807SJeff Garzik tmp = tmp8; 5999c6fd2807SJeff Garzik break; 6000c6fd2807SJeff Garzik } 6001c6fd2807SJeff Garzik case 2: { 6002c6fd2807SJeff Garzik u16 tmp16 = 0; 6003c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6004c6fd2807SJeff Garzik tmp = tmp16; 6005c6fd2807SJeff Garzik break; 6006c6fd2807SJeff Garzik } 6007c6fd2807SJeff Garzik case 4: { 6008c6fd2807SJeff Garzik u32 tmp32 = 0; 6009c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6010c6fd2807SJeff Garzik tmp = tmp32; 6011c6fd2807SJeff Garzik break; 6012c6fd2807SJeff Garzik } 6013c6fd2807SJeff Garzik 6014c6fd2807SJeff Garzik default: 6015c6fd2807SJeff Garzik return -EINVAL; 6016c6fd2807SJeff Garzik } 6017c6fd2807SJeff Garzik 6018c6fd2807SJeff Garzik tmp &= bits->mask; 6019c6fd2807SJeff Garzik 6020c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6021c6fd2807SJeff Garzik } 6022c6fd2807SJeff Garzik 60236ffa01d8STejun Heo #ifdef CONFIG_PM 6024c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6025c6fd2807SJeff Garzik { 6026c6fd2807SJeff Garzik pci_save_state(pdev); 6027c6fd2807SJeff Garzik pci_disable_device(pdev); 60284c90d971STejun Heo 60293a2d5b70SRafael J. Wysocki if (mesg.event & PM_EVENT_SLEEP) 6030c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6031c6fd2807SJeff Garzik } 6032c6fd2807SJeff Garzik 6033553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6034c6fd2807SJeff Garzik { 6035553c4aa6STejun Heo int rc; 6036553c4aa6STejun Heo 6037c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6038c6fd2807SJeff Garzik pci_restore_state(pdev); 6039553c4aa6STejun Heo 6040f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6041553c4aa6STejun Heo if (rc) { 6042553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6043553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6044553c4aa6STejun Heo return rc; 6045553c4aa6STejun Heo } 6046553c4aa6STejun Heo 6047c6fd2807SJeff Garzik pci_set_master(pdev); 6048553c4aa6STejun Heo return 0; 6049c6fd2807SJeff Garzik } 6050c6fd2807SJeff Garzik 6051c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6052c6fd2807SJeff Garzik { 6053cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6054c6fd2807SJeff Garzik int rc = 0; 6055c6fd2807SJeff Garzik 6056cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6057c6fd2807SJeff Garzik if (rc) 6058c6fd2807SJeff Garzik return rc; 6059c6fd2807SJeff Garzik 6060c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6061c6fd2807SJeff Garzik 6062c6fd2807SJeff Garzik return 0; 6063c6fd2807SJeff Garzik } 6064c6fd2807SJeff Garzik 6065c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6066c6fd2807SJeff Garzik { 6067cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6068553c4aa6STejun Heo int rc; 6069c6fd2807SJeff Garzik 6070553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6071553c4aa6STejun Heo if (rc == 0) 6072cca3974eSJeff Garzik ata_host_resume(host); 6073553c4aa6STejun Heo return rc; 6074c6fd2807SJeff Garzik } 60756ffa01d8STejun Heo #endif /* CONFIG_PM */ 60766ffa01d8STejun Heo 6077c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6078c6fd2807SJeff Garzik 607933267325STejun Heo static int __init ata_parse_force_one(char **cur, 608033267325STejun Heo struct ata_force_ent *force_ent, 608133267325STejun Heo const char **reason) 608233267325STejun Heo { 608333267325STejun Heo /* FIXME: Currently, there's no way to tag init const data and 608433267325STejun Heo * using __initdata causes build failure on some versions of 608533267325STejun Heo * gcc. Once __initdataconst is implemented, add const to the 608633267325STejun Heo * following structure. 608733267325STejun Heo */ 608833267325STejun Heo static struct ata_force_param force_tbl[] __initdata = { 608933267325STejun Heo { "40c", .cbl = ATA_CBL_PATA40 }, 609033267325STejun Heo { "80c", .cbl = ATA_CBL_PATA80 }, 609133267325STejun Heo { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, 609233267325STejun Heo { "unk", .cbl = ATA_CBL_PATA_UNK }, 609333267325STejun Heo { "ign", .cbl = ATA_CBL_PATA_IGN }, 609433267325STejun Heo { "sata", .cbl = ATA_CBL_SATA }, 609533267325STejun Heo { "1.5Gbps", .spd_limit = 1 }, 609633267325STejun Heo { "3.0Gbps", .spd_limit = 2 }, 609733267325STejun Heo { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, 609833267325STejun Heo { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, 609933267325STejun Heo { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, 610033267325STejun Heo { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, 610133267325STejun Heo { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, 610233267325STejun Heo { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, 610333267325STejun Heo { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, 610433267325STejun Heo { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, 610533267325STejun Heo { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, 610633267325STejun Heo { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, 610733267325STejun Heo { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, 610833267325STejun Heo { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, 610933267325STejun Heo { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, 611033267325STejun Heo { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, 611133267325STejun Heo { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 611233267325STejun Heo { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 611333267325STejun Heo { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 611433267325STejun Heo { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 611533267325STejun Heo { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 611633267325STejun Heo { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 611733267325STejun Heo { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 611833267325STejun Heo { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 611933267325STejun Heo { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 612033267325STejun Heo { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 612133267325STejun Heo { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 612233267325STejun Heo { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 612333267325STejun Heo { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 612433267325STejun Heo { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 612533267325STejun Heo { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 612633267325STejun Heo { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 612733267325STejun Heo { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 612833267325STejun Heo { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 612933267325STejun Heo { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 613033267325STejun Heo { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 613133267325STejun Heo { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 613233267325STejun Heo { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, 613305944bdfSTejun Heo { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, 613405944bdfSTejun Heo { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, 613505944bdfSTejun Heo { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, 613633267325STejun Heo }; 613733267325STejun Heo char *start = *cur, *p = *cur; 613833267325STejun Heo char *id, *val, *endp; 613933267325STejun Heo const struct ata_force_param *match_fp = NULL; 614033267325STejun Heo int nr_matches = 0, i; 614133267325STejun Heo 614233267325STejun Heo /* find where this param ends and update *cur */ 614333267325STejun Heo while (*p != '\0' && *p != ',') 614433267325STejun Heo p++; 614533267325STejun Heo 614633267325STejun Heo if (*p == '\0') 614733267325STejun Heo *cur = p; 614833267325STejun Heo else 614933267325STejun Heo *cur = p + 1; 615033267325STejun Heo 615133267325STejun Heo *p = '\0'; 615233267325STejun Heo 615333267325STejun Heo /* parse */ 615433267325STejun Heo p = strchr(start, ':'); 615533267325STejun Heo if (!p) { 615633267325STejun Heo val = strstrip(start); 615733267325STejun Heo goto parse_val; 615833267325STejun Heo } 615933267325STejun Heo *p = '\0'; 616033267325STejun Heo 616133267325STejun Heo id = strstrip(start); 616233267325STejun Heo val = strstrip(p + 1); 616333267325STejun Heo 616433267325STejun Heo /* parse id */ 616533267325STejun Heo p = strchr(id, '.'); 616633267325STejun Heo if (p) { 616733267325STejun Heo *p++ = '\0'; 616833267325STejun Heo force_ent->device = simple_strtoul(p, &endp, 10); 616933267325STejun Heo if (p == endp || *endp != '\0') { 617033267325STejun Heo *reason = "invalid device"; 617133267325STejun Heo return -EINVAL; 617233267325STejun Heo } 617333267325STejun Heo } 617433267325STejun Heo 617533267325STejun Heo force_ent->port = simple_strtoul(id, &endp, 10); 617633267325STejun Heo if (p == endp || *endp != '\0') { 617733267325STejun Heo *reason = "invalid port/link"; 617833267325STejun Heo return -EINVAL; 617933267325STejun Heo } 618033267325STejun Heo 618133267325STejun Heo parse_val: 618233267325STejun Heo /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ 618333267325STejun Heo for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 618433267325STejun Heo const struct ata_force_param *fp = &force_tbl[i]; 618533267325STejun Heo 618633267325STejun Heo if (strncasecmp(val, fp->name, strlen(val))) 618733267325STejun Heo continue; 618833267325STejun Heo 618933267325STejun Heo nr_matches++; 619033267325STejun Heo match_fp = fp; 619133267325STejun Heo 619233267325STejun Heo if (strcasecmp(val, fp->name) == 0) { 619333267325STejun Heo nr_matches = 1; 619433267325STejun Heo break; 619533267325STejun Heo } 619633267325STejun Heo } 619733267325STejun Heo 619833267325STejun Heo if (!nr_matches) { 619933267325STejun Heo *reason = "unknown value"; 620033267325STejun Heo return -EINVAL; 620133267325STejun Heo } 620233267325STejun Heo if (nr_matches > 1) { 620333267325STejun Heo *reason = "ambigious value"; 620433267325STejun Heo return -EINVAL; 620533267325STejun Heo } 620633267325STejun Heo 620733267325STejun Heo force_ent->param = *match_fp; 620833267325STejun Heo 620933267325STejun Heo return 0; 621033267325STejun Heo } 621133267325STejun Heo 621233267325STejun Heo static void __init ata_parse_force_param(void) 621333267325STejun Heo { 621433267325STejun Heo int idx = 0, size = 1; 621533267325STejun Heo int last_port = -1, last_device = -1; 621633267325STejun Heo char *p, *cur, *next; 621733267325STejun Heo 621833267325STejun Heo /* calculate maximum number of params and allocate force_tbl */ 621933267325STejun Heo for (p = ata_force_param_buf; *p; p++) 622033267325STejun Heo if (*p == ',') 622133267325STejun Heo size++; 622233267325STejun Heo 622333267325STejun Heo ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); 622433267325STejun Heo if (!ata_force_tbl) { 622533267325STejun Heo printk(KERN_WARNING "ata: failed to extend force table, " 622633267325STejun Heo "libata.force ignored\n"); 622733267325STejun Heo return; 622833267325STejun Heo } 622933267325STejun Heo 623033267325STejun Heo /* parse and populate the table */ 623133267325STejun Heo for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 623233267325STejun Heo const char *reason = ""; 623333267325STejun Heo struct ata_force_ent te = { .port = -1, .device = -1 }; 623433267325STejun Heo 623533267325STejun Heo next = cur; 623633267325STejun Heo if (ata_parse_force_one(&next, &te, &reason)) { 623733267325STejun Heo printk(KERN_WARNING "ata: failed to parse force " 623833267325STejun Heo "parameter \"%s\" (%s)\n", 623933267325STejun Heo cur, reason); 624033267325STejun Heo continue; 624133267325STejun Heo } 624233267325STejun Heo 624333267325STejun Heo if (te.port == -1) { 624433267325STejun Heo te.port = last_port; 624533267325STejun Heo te.device = last_device; 624633267325STejun Heo } 624733267325STejun Heo 624833267325STejun Heo ata_force_tbl[idx++] = te; 624933267325STejun Heo 625033267325STejun Heo last_port = te.port; 625133267325STejun Heo last_device = te.device; 625233267325STejun Heo } 625333267325STejun Heo 625433267325STejun Heo ata_force_tbl_size = idx; 625533267325STejun Heo } 6256c6fd2807SJeff Garzik 6257c6fd2807SJeff Garzik static int __init ata_init(void) 6258c6fd2807SJeff Garzik { 625933267325STejun Heo ata_parse_force_param(); 626033267325STejun Heo 6261c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6262c6fd2807SJeff Garzik if (!ata_wq) 626349ea3b04SElias Oltmanns goto free_force_tbl; 6264c6fd2807SJeff Garzik 6265c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 626649ea3b04SElias Oltmanns if (!ata_aux_wq) 626749ea3b04SElias Oltmanns goto free_wq; 6268c6fd2807SJeff Garzik 6269c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6270c6fd2807SJeff Garzik return 0; 627149ea3b04SElias Oltmanns 627249ea3b04SElias Oltmanns free_wq: 627349ea3b04SElias Oltmanns destroy_workqueue(ata_wq); 627449ea3b04SElias Oltmanns free_force_tbl: 627549ea3b04SElias Oltmanns kfree(ata_force_tbl); 627649ea3b04SElias Oltmanns return -ENOMEM; 6277c6fd2807SJeff Garzik } 6278c6fd2807SJeff Garzik 6279c6fd2807SJeff Garzik static void __exit ata_exit(void) 6280c6fd2807SJeff Garzik { 628133267325STejun Heo kfree(ata_force_tbl); 6282c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6283c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6284c6fd2807SJeff Garzik } 6285c6fd2807SJeff Garzik 6286a4625085SBrian King subsys_initcall(ata_init); 6287c6fd2807SJeff Garzik module_exit(ata_exit); 6288c6fd2807SJeff Garzik 6289c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6290c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6291c6fd2807SJeff Garzik 6292c6fd2807SJeff Garzik int ata_ratelimit(void) 6293c6fd2807SJeff Garzik { 6294c6fd2807SJeff Garzik int rc; 6295c6fd2807SJeff Garzik unsigned long flags; 6296c6fd2807SJeff Garzik 6297c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6298c6fd2807SJeff Garzik 6299c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6300c6fd2807SJeff Garzik rc = 1; 6301c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6302c6fd2807SJeff Garzik } else 6303c6fd2807SJeff Garzik rc = 0; 6304c6fd2807SJeff Garzik 6305c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6306c6fd2807SJeff Garzik 6307c6fd2807SJeff Garzik return rc; 6308c6fd2807SJeff Garzik } 6309c6fd2807SJeff Garzik 6310c6fd2807SJeff Garzik /** 6311c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6312c6fd2807SJeff Garzik * @reg: IO-mapped register 6313c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6314c6fd2807SJeff Garzik * @val: Wait condition 6315341c2c95STejun Heo * @interval: polling interval in milliseconds 6316341c2c95STejun Heo * @timeout: timeout in milliseconds 6317c6fd2807SJeff Garzik * 6318c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6319c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6320c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6321c6fd2807SJeff Garzik * 6322c6fd2807SJeff Garzik * (*@reg & mask) != val 6323c6fd2807SJeff Garzik * 6324c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6325c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6326c6fd2807SJeff Garzik * 6327c6fd2807SJeff Garzik * LOCKING: 6328c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6329c6fd2807SJeff Garzik * 6330c6fd2807SJeff Garzik * RETURNS: 6331c6fd2807SJeff Garzik * The final register value. 6332c6fd2807SJeff Garzik */ 6333c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6334341c2c95STejun Heo unsigned long interval, unsigned long timeout) 6335c6fd2807SJeff Garzik { 6336341c2c95STejun Heo unsigned long deadline; 6337c6fd2807SJeff Garzik u32 tmp; 6338c6fd2807SJeff Garzik 6339c6fd2807SJeff Garzik tmp = ioread32(reg); 6340c6fd2807SJeff Garzik 6341c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6342c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6343c6fd2807SJeff Garzik * eat away the timeout. 6344c6fd2807SJeff Garzik */ 6345341c2c95STejun Heo deadline = ata_deadline(jiffies, timeout); 6346c6fd2807SJeff Garzik 6347341c2c95STejun Heo while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6348341c2c95STejun Heo msleep(interval); 6349c6fd2807SJeff Garzik tmp = ioread32(reg); 6350c6fd2807SJeff Garzik } 6351c6fd2807SJeff Garzik 6352c6fd2807SJeff Garzik return tmp; 6353c6fd2807SJeff Garzik } 6354c6fd2807SJeff Garzik 6355c6fd2807SJeff Garzik /* 6356c6fd2807SJeff Garzik * Dummy port_ops 6357c6fd2807SJeff Garzik */ 6358c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6359c6fd2807SJeff Garzik { 6360c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6361c6fd2807SJeff Garzik } 6362c6fd2807SJeff Garzik 6363182d7bbaSTejun Heo static void ata_dummy_error_handler(struct ata_port *ap) 6364182d7bbaSTejun Heo { 6365182d7bbaSTejun Heo /* truly dummy */ 6366182d7bbaSTejun Heo } 6367182d7bbaSTejun Heo 6368029cfd6bSTejun Heo struct ata_port_operations ata_dummy_port_ops = { 6369c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6370c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6371182d7bbaSTejun Heo .error_handler = ata_dummy_error_handler, 6372c6fd2807SJeff Garzik }; 6373c6fd2807SJeff Garzik 637421b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 637521b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 637621b0ad4fSTejun Heo }; 637721b0ad4fSTejun Heo 6378c6fd2807SJeff Garzik /* 6379c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6380c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6381c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6382c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6383c6fd2807SJeff Garzik */ 6384c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6385c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6386c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6387029cfd6bSTejun Heo EXPORT_SYMBOL_GPL(ata_base_port_ops); 6388029cfd6bSTejun Heo EXPORT_SYMBOL_GPL(sata_port_ops); 6389c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 639021b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6391aadffb68STejun Heo EXPORT_SYMBOL_GPL(__ata_port_next_link); 6392c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6393cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6394f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 6395f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6396b1c72916STejun Heo EXPORT_SYMBOL_GPL(ata_slave_link_init); 6397ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 6398f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 6399f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 64000529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6401c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6402c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6403c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6404436d34b3STejun Heo EXPORT_SYMBOL_GPL(atapi_cmd_type); 6405c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6406c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 64076357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_pack_xfermask); 64086357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_unpack_xfermask); 64096357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 64106357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 64116357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 64126357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_mode_string); 64136357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_id_xfermask); 6414c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 641504351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 641631cc23b3STejun Heo EXPORT_SYMBOL_GPL(ata_std_qc_defer); 6417c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6418c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 641910305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 6420c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6421aa2731adSTejun Heo EXPORT_SYMBOL_GPL(ata_wait_after_reset); 6422936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_debounce); 6423936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_resume); 64240aa1113dSTejun Heo EXPORT_SYMBOL_GPL(ata_std_prereset); 6425cc0680a5STejun Heo EXPORT_SYMBOL_GPL(sata_link_hardreset); 642657c9efdfSTejun Heo EXPORT_SYMBOL_GPL(sata_std_hardreset); 6427203c75b8STejun Heo EXPORT_SYMBOL_GPL(ata_std_postreset); 6428c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6429c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6430c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6431c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6432c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6433c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6434c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6435c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6436c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6437c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6438c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6439c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6440c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6441c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6442936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_online); 6443936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_offline); 64446ffa01d8STejun Heo #ifdef CONFIG_PM 6445cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6446cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 64476ffa01d8STejun Heo #endif /* CONFIG_PM */ 6448c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6449c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 6450963e4975SAlan Cox EXPORT_SYMBOL_GPL(ata_do_dev_read_id); 6451c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6452c6fd2807SJeff Garzik 6453c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 64546357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_timing_find_mode); 6455c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6456c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6457a0f79b92STejun Heo EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); 6458c6fd2807SJeff Garzik 6459c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6460c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6461c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 64626ffa01d8STejun Heo #ifdef CONFIG_PM 6463c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6464c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6465c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6466c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 64676ffa01d8STejun Heo #endif /* CONFIG_PM */ 6468c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6469c6fd2807SJeff Garzik 6470b64bbc39STejun Heo EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); 6471b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_push_desc); 6472b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); 6473cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_desc); 6474cbcdd875STejun Heo #ifdef CONFIG_PCI 6475cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_pbar_desc); 6476cbcdd875STejun Heo #endif /* CONFIG_PCI */ 6477c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6478dbd82616STejun Heo EXPORT_SYMBOL_GPL(ata_link_abort); 6479c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6480c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 64817d77b247STejun Heo EXPORT_SYMBOL_GPL(sata_async_notification); 6482c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6483c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6484c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6485c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 648610acf3b0SMark Lord EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); 6487c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 6488a1efdabaSTejun Heo EXPORT_SYMBOL_GPL(ata_std_error_handler); 6489be0d18dfSAlan Cox 6490be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 6491be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 6492be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 6493c88f90c3STejun Heo EXPORT_SYMBOL_GPL(ata_cable_ignore); 6494be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 6495