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> 5979318057SArjan van de Ven #include <linux/async.h> 60e18086d6SMark Lord #include <linux/log2.h> 615a0e3ad6STejun Heo #include <linux/slab.h> 62c6fd2807SJeff Garzik #include <scsi/scsi.h> 63c6fd2807SJeff Garzik #include <scsi/scsi_cmnd.h> 64c6fd2807SJeff Garzik #include <scsi/scsi_host.h> 65c6fd2807SJeff Garzik #include <linux/libata.h> 66c6fd2807SJeff Garzik #include <asm/byteorder.h> 67140b5e59STejun Heo #include <linux/cdrom.h> 689990b6f3SAkinobu Mita #include <linux/ratelimit.h> 69c6fd2807SJeff Garzik 70c6fd2807SJeff Garzik #include "libata.h" 71c6fd2807SJeff Garzik 72fda0efc5SJeff Garzik 73c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 74c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 75c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 76c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 77c6fd2807SJeff Garzik 78029cfd6bSTejun Heo const struct ata_port_operations ata_base_port_ops = { 790aa1113dSTejun Heo .prereset = ata_std_prereset, 80203c75b8STejun Heo .postreset = ata_std_postreset, 81a1efdabaSTejun Heo .error_handler = ata_std_error_handler, 82029cfd6bSTejun Heo }; 83029cfd6bSTejun Heo 84029cfd6bSTejun Heo const struct ata_port_operations sata_port_ops = { 85029cfd6bSTejun Heo .inherits = &ata_base_port_ops, 86029cfd6bSTejun Heo 87029cfd6bSTejun Heo .qc_defer = ata_std_qc_defer, 8857c9efdfSTejun Heo .hardreset = sata_std_hardreset, 89029cfd6bSTejun Heo }; 90029cfd6bSTejun Heo 91c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 92c6fd2807SJeff Garzik u16 heads, u16 sectors); 93c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 94218f3d30SJeff Garzik static unsigned int ata_dev_set_feature(struct ata_device *dev, 95218f3d30SJeff Garzik u8 enable, u8 feature); 96c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 9775683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 98c6fd2807SJeff Garzik 99f3187195STejun Heo unsigned int ata_print_id = 1; 100c6fd2807SJeff Garzik 10133267325STejun Heo struct ata_force_param { 10233267325STejun Heo const char *name; 10333267325STejun Heo unsigned int cbl; 10433267325STejun Heo int spd_limit; 10533267325STejun Heo unsigned long xfer_mask; 10633267325STejun Heo unsigned int horkage_on; 10733267325STejun Heo unsigned int horkage_off; 10805944bdfSTejun Heo unsigned int lflags; 10933267325STejun Heo }; 11033267325STejun Heo 11133267325STejun Heo struct ata_force_ent { 11233267325STejun Heo int port; 11333267325STejun Heo int device; 11433267325STejun Heo struct ata_force_param param; 11533267325STejun Heo }; 11633267325STejun Heo 11733267325STejun Heo static struct ata_force_ent *ata_force_tbl; 11833267325STejun Heo static int ata_force_tbl_size; 11933267325STejun Heo 12033267325STejun Heo static char ata_force_param_buf[PAGE_SIZE] __initdata; 1217afb4222STejun Heo /* param_buf is thrown away after initialization, disallow read */ 1227afb4222STejun Heo module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); 12333267325STejun Heo MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); 12433267325STejun Heo 1252486fa56STejun Heo static int atapi_enabled = 1; 126c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 127ad5d8eacSEvgeni Golov MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); 128c6fd2807SJeff Garzik 129c5c61bdaSAdrian Bunk static int atapi_dmadir = 0; 130c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 131ad5d8eacSEvgeni Golov MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); 132c6fd2807SJeff Garzik 133baf4fdfaSMark Lord int atapi_passthru16 = 1; 134baf4fdfaSMark Lord module_param(atapi_passthru16, int, 0444); 135ad5d8eacSEvgeni Golov MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); 136baf4fdfaSMark Lord 137c6fd2807SJeff Garzik int libata_fua = 0; 138c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 139ad5d8eacSEvgeni Golov MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); 140c6fd2807SJeff Garzik 1412dcb407eSJeff Garzik static int ata_ignore_hpa; 1421e999736SAlan Cox module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 1431e999736SAlan Cox MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 1441e999736SAlan Cox 145b3a70601SAlan Cox static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 146b3a70601SAlan Cox module_param_named(dma, libata_dma_mask, int, 0444); 147b3a70601SAlan Cox MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 148b3a70601SAlan Cox 14987fbc5a0STejun Heo static int ata_probe_timeout; 150c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 151c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 152c6fd2807SJeff Garzik 1536ebe9d86SJeff Garzik int libata_noacpi = 0; 154d7d0dad6SJeff Garzik module_param_named(noacpi, libata_noacpi, int, 0444); 155ad5d8eacSEvgeni Golov MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); 15611ef697bSKristen Carlson Accardi 157ae8d4ee7SAlan Cox int libata_allow_tpm = 0; 158ae8d4ee7SAlan Cox module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 159ad5d8eacSEvgeni Golov MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); 160ae8d4ee7SAlan Cox 161e7ecd435STejun Heo static int atapi_an; 162e7ecd435STejun Heo module_param(atapi_an, int, 0444); 163e7ecd435STejun Heo MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); 164e7ecd435STejun Heo 165c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 166c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 167c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 168c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 169c6fd2807SJeff Garzik 170c6fd2807SJeff Garzik 1719913ff8aSTejun Heo static bool ata_sstatus_online(u32 sstatus) 1729913ff8aSTejun Heo { 1739913ff8aSTejun Heo return (sstatus & 0xf) == 0x3; 1749913ff8aSTejun Heo } 1759913ff8aSTejun Heo 1761eca4365STejun Heo /** 1771eca4365STejun Heo * ata_link_next - link iteration helper 1781eca4365STejun Heo * @link: the previous link, NULL to start 1791eca4365STejun Heo * @ap: ATA port containing links to iterate 1801eca4365STejun Heo * @mode: iteration mode, one of ATA_LITER_* 181aadffb68STejun Heo * 182aadffb68STejun Heo * LOCKING: 183aadffb68STejun Heo * Host lock or EH context. 1841eca4365STejun Heo * 1851eca4365STejun Heo * RETURNS: 1861eca4365STejun Heo * Pointer to the next link. 187aadffb68STejun Heo */ 1881eca4365STejun Heo struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, 1891eca4365STejun Heo enum ata_link_iter_mode mode) 190aadffb68STejun Heo { 1911eca4365STejun Heo BUG_ON(mode != ATA_LITER_EDGE && 1921eca4365STejun Heo mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); 1931eca4365STejun Heo 194aadffb68STejun Heo /* NULL link indicates start of iteration */ 1951eca4365STejun Heo if (!link) 1961eca4365STejun Heo switch (mode) { 1971eca4365STejun Heo case ATA_LITER_EDGE: 1981eca4365STejun Heo case ATA_LITER_PMP_FIRST: 1991eca4365STejun Heo if (sata_pmp_attached(ap)) 200aadffb68STejun Heo return ap->pmp_link; 2011eca4365STejun Heo /* fall through */ 2021eca4365STejun Heo case ATA_LITER_HOST_FIRST: 203aadffb68STejun Heo return &ap->link; 204aadffb68STejun Heo } 205aadffb68STejun Heo 2061eca4365STejun Heo /* we just iterated over the host link, what's next? */ 2071eca4365STejun Heo if (link == &ap->link) 2081eca4365STejun Heo switch (mode) { 2091eca4365STejun Heo case ATA_LITER_HOST_FIRST: 2101eca4365STejun Heo if (sata_pmp_attached(ap)) 211aadffb68STejun Heo return ap->pmp_link; 2121eca4365STejun Heo /* fall through */ 2131eca4365STejun Heo case ATA_LITER_PMP_FIRST: 2141eca4365STejun Heo if (unlikely(ap->slave_link)) 2151eca4365STejun Heo return ap->slave_link; 2161eca4365STejun Heo /* fall through */ 2171eca4365STejun Heo case ATA_LITER_EDGE: 2181eca4365STejun Heo return NULL; 219aadffb68STejun Heo } 220aadffb68STejun Heo 221b1c72916STejun Heo /* slave_link excludes PMP */ 222b1c72916STejun Heo if (unlikely(link == ap->slave_link)) 223b1c72916STejun Heo return NULL; 224b1c72916STejun Heo 2251eca4365STejun Heo /* we were over a PMP link */ 226aadffb68STejun Heo if (++link < ap->pmp_link + ap->nr_pmp_links) 227aadffb68STejun Heo return link; 2281eca4365STejun Heo 2291eca4365STejun Heo if (mode == ATA_LITER_PMP_FIRST) 2301eca4365STejun Heo return &ap->link; 2311eca4365STejun Heo 232aadffb68STejun Heo return NULL; 233aadffb68STejun Heo } 234aadffb68STejun Heo 235c6fd2807SJeff Garzik /** 2361eca4365STejun Heo * ata_dev_next - device iteration helper 2371eca4365STejun Heo * @dev: the previous device, NULL to start 2381eca4365STejun Heo * @link: ATA link containing devices to iterate 2391eca4365STejun Heo * @mode: iteration mode, one of ATA_DITER_* 2401eca4365STejun Heo * 2411eca4365STejun Heo * LOCKING: 2421eca4365STejun Heo * Host lock or EH context. 2431eca4365STejun Heo * 2441eca4365STejun Heo * RETURNS: 2451eca4365STejun Heo * Pointer to the next device. 2461eca4365STejun Heo */ 2471eca4365STejun Heo struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, 2481eca4365STejun Heo enum ata_dev_iter_mode mode) 2491eca4365STejun Heo { 2501eca4365STejun Heo BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && 2511eca4365STejun Heo mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); 2521eca4365STejun Heo 2531eca4365STejun Heo /* NULL dev indicates start of iteration */ 2541eca4365STejun Heo if (!dev) 2551eca4365STejun Heo switch (mode) { 2561eca4365STejun Heo case ATA_DITER_ENABLED: 2571eca4365STejun Heo case ATA_DITER_ALL: 2581eca4365STejun Heo dev = link->device; 2591eca4365STejun Heo goto check; 2601eca4365STejun Heo case ATA_DITER_ENABLED_REVERSE: 2611eca4365STejun Heo case ATA_DITER_ALL_REVERSE: 2621eca4365STejun Heo dev = link->device + ata_link_max_devices(link) - 1; 2631eca4365STejun Heo goto check; 2641eca4365STejun Heo } 2651eca4365STejun Heo 2661eca4365STejun Heo next: 2671eca4365STejun Heo /* move to the next one */ 2681eca4365STejun Heo switch (mode) { 2691eca4365STejun Heo case ATA_DITER_ENABLED: 2701eca4365STejun Heo case ATA_DITER_ALL: 2711eca4365STejun Heo if (++dev < link->device + ata_link_max_devices(link)) 2721eca4365STejun Heo goto check; 2731eca4365STejun Heo return NULL; 2741eca4365STejun Heo case ATA_DITER_ENABLED_REVERSE: 2751eca4365STejun Heo case ATA_DITER_ALL_REVERSE: 2761eca4365STejun Heo if (--dev >= link->device) 2771eca4365STejun Heo goto check; 2781eca4365STejun Heo return NULL; 2791eca4365STejun Heo } 2801eca4365STejun Heo 2811eca4365STejun Heo check: 2821eca4365STejun Heo if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && 2831eca4365STejun Heo !ata_dev_enabled(dev)) 2841eca4365STejun Heo goto next; 2851eca4365STejun Heo return dev; 2861eca4365STejun Heo } 2871eca4365STejun Heo 2881eca4365STejun Heo /** 289b1c72916STejun Heo * ata_dev_phys_link - find physical link for a device 290b1c72916STejun Heo * @dev: ATA device to look up physical link for 291b1c72916STejun Heo * 292b1c72916STejun Heo * Look up physical link which @dev is attached to. Note that 293b1c72916STejun Heo * this is different from @dev->link only when @dev is on slave 294b1c72916STejun Heo * link. For all other cases, it's the same as @dev->link. 295b1c72916STejun Heo * 296b1c72916STejun Heo * LOCKING: 297b1c72916STejun Heo * Don't care. 298b1c72916STejun Heo * 299b1c72916STejun Heo * RETURNS: 300b1c72916STejun Heo * Pointer to the found physical link. 301b1c72916STejun Heo */ 302b1c72916STejun Heo struct ata_link *ata_dev_phys_link(struct ata_device *dev) 303b1c72916STejun Heo { 304b1c72916STejun Heo struct ata_port *ap = dev->link->ap; 305b1c72916STejun Heo 306b1c72916STejun Heo if (!ap->slave_link) 307b1c72916STejun Heo return dev->link; 308b1c72916STejun Heo if (!dev->devno) 309b1c72916STejun Heo return &ap->link; 310b1c72916STejun Heo return ap->slave_link; 311b1c72916STejun Heo } 312b1c72916STejun Heo 313b1c72916STejun Heo /** 31433267325STejun Heo * ata_force_cbl - force cable type according to libata.force 3154cdfa1b3SRandy Dunlap * @ap: ATA port of interest 31633267325STejun Heo * 31733267325STejun Heo * Force cable type according to libata.force and whine about it. 31833267325STejun Heo * The last entry which has matching port number is used, so it 31933267325STejun Heo * can be specified as part of device force parameters. For 32033267325STejun Heo * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 32133267325STejun Heo * same effect. 32233267325STejun Heo * 32333267325STejun Heo * LOCKING: 32433267325STejun Heo * EH context. 32533267325STejun Heo */ 32633267325STejun Heo void ata_force_cbl(struct ata_port *ap) 32733267325STejun Heo { 32833267325STejun Heo int i; 32933267325STejun Heo 33033267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 33133267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 33233267325STejun Heo 33333267325STejun Heo if (fe->port != -1 && fe->port != ap->print_id) 33433267325STejun Heo continue; 33533267325STejun Heo 33633267325STejun Heo if (fe->param.cbl == ATA_CBL_NONE) 33733267325STejun Heo continue; 33833267325STejun Heo 33933267325STejun Heo ap->cbl = fe->param.cbl; 34033267325STejun Heo ata_port_printk(ap, KERN_NOTICE, 34133267325STejun Heo "FORCE: cable set to %s\n", fe->param.name); 34233267325STejun Heo return; 34333267325STejun Heo } 34433267325STejun Heo } 34533267325STejun Heo 34633267325STejun Heo /** 34705944bdfSTejun Heo * ata_force_link_limits - force link limits according to libata.force 34833267325STejun Heo * @link: ATA link of interest 34933267325STejun Heo * 35005944bdfSTejun Heo * Force link flags and SATA spd limit according to libata.force 35105944bdfSTejun Heo * and whine about it. When only the port part is specified 35205944bdfSTejun Heo * (e.g. 1:), the limit applies to all links connected to both 35305944bdfSTejun Heo * the host link and all fan-out ports connected via PMP. If the 35405944bdfSTejun Heo * device part is specified as 0 (e.g. 1.00:), it specifies the 35505944bdfSTejun Heo * first fan-out link not the host link. Device number 15 always 356b1c72916STejun Heo * points to the host link whether PMP is attached or not. If the 357b1c72916STejun Heo * controller has slave link, device number 16 points to it. 35833267325STejun Heo * 35933267325STejun Heo * LOCKING: 36033267325STejun Heo * EH context. 36133267325STejun Heo */ 36205944bdfSTejun Heo static void ata_force_link_limits(struct ata_link *link) 36333267325STejun Heo { 36405944bdfSTejun Heo bool did_spd = false; 365b1c72916STejun Heo int linkno = link->pmp; 366b1c72916STejun Heo int i; 36733267325STejun Heo 36833267325STejun Heo if (ata_is_host_link(link)) 369b1c72916STejun Heo linkno += 15; 37033267325STejun Heo 37133267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 37233267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 37333267325STejun Heo 37433267325STejun Heo if (fe->port != -1 && fe->port != link->ap->print_id) 37533267325STejun Heo continue; 37633267325STejun Heo 37733267325STejun Heo if (fe->device != -1 && fe->device != linkno) 37833267325STejun Heo continue; 37933267325STejun Heo 38005944bdfSTejun Heo /* only honor the first spd limit */ 38105944bdfSTejun Heo if (!did_spd && fe->param.spd_limit) { 38233267325STejun Heo link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 38333267325STejun Heo ata_link_printk(link, KERN_NOTICE, 38405944bdfSTejun Heo "FORCE: PHY spd limit set to %s\n", 38505944bdfSTejun Heo fe->param.name); 38605944bdfSTejun Heo did_spd = true; 38705944bdfSTejun Heo } 38805944bdfSTejun Heo 38905944bdfSTejun Heo /* let lflags stack */ 39005944bdfSTejun Heo if (fe->param.lflags) { 39105944bdfSTejun Heo link->flags |= fe->param.lflags; 39205944bdfSTejun Heo ata_link_printk(link, KERN_NOTICE, 39305944bdfSTejun Heo "FORCE: link flag 0x%x forced -> 0x%x\n", 39405944bdfSTejun Heo fe->param.lflags, link->flags); 39505944bdfSTejun Heo } 39633267325STejun Heo } 39733267325STejun Heo } 39833267325STejun Heo 39933267325STejun Heo /** 40033267325STejun Heo * ata_force_xfermask - force xfermask according to libata.force 40133267325STejun Heo * @dev: ATA device of interest 40233267325STejun Heo * 40333267325STejun Heo * Force xfer_mask according to libata.force and whine about it. 40433267325STejun Heo * For consistency with link selection, device number 15 selects 40533267325STejun Heo * the first device connected to the host link. 40633267325STejun Heo * 40733267325STejun Heo * LOCKING: 40833267325STejun Heo * EH context. 40933267325STejun Heo */ 41033267325STejun Heo static void ata_force_xfermask(struct ata_device *dev) 41133267325STejun Heo { 41233267325STejun Heo int devno = dev->link->pmp + dev->devno; 41333267325STejun Heo int alt_devno = devno; 41433267325STejun Heo int i; 41533267325STejun Heo 416b1c72916STejun Heo /* allow n.15/16 for devices attached to host port */ 417b1c72916STejun Heo if (ata_is_host_link(dev->link)) 418b1c72916STejun Heo alt_devno += 15; 41933267325STejun Heo 42033267325STejun Heo for (i = ata_force_tbl_size - 1; i >= 0; i--) { 42133267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 42233267325STejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 42333267325STejun Heo 42433267325STejun Heo if (fe->port != -1 && fe->port != dev->link->ap->print_id) 42533267325STejun Heo continue; 42633267325STejun Heo 42733267325STejun Heo if (fe->device != -1 && fe->device != devno && 42833267325STejun Heo fe->device != alt_devno) 42933267325STejun Heo continue; 43033267325STejun Heo 43133267325STejun Heo if (!fe->param.xfer_mask) 43233267325STejun Heo continue; 43333267325STejun Heo 43433267325STejun Heo ata_unpack_xfermask(fe->param.xfer_mask, 43533267325STejun Heo &pio_mask, &mwdma_mask, &udma_mask); 43633267325STejun Heo if (udma_mask) 43733267325STejun Heo dev->udma_mask = udma_mask; 43833267325STejun Heo else if (mwdma_mask) { 43933267325STejun Heo dev->udma_mask = 0; 44033267325STejun Heo dev->mwdma_mask = mwdma_mask; 44133267325STejun Heo } else { 44233267325STejun Heo dev->udma_mask = 0; 44333267325STejun Heo dev->mwdma_mask = 0; 44433267325STejun Heo dev->pio_mask = pio_mask; 44533267325STejun Heo } 44633267325STejun Heo 44733267325STejun Heo ata_dev_printk(dev, KERN_NOTICE, 44833267325STejun Heo "FORCE: xfer_mask set to %s\n", fe->param.name); 44933267325STejun Heo return; 45033267325STejun Heo } 45133267325STejun Heo } 45233267325STejun Heo 45333267325STejun Heo /** 45433267325STejun Heo * ata_force_horkage - force horkage according to libata.force 45533267325STejun Heo * @dev: ATA device of interest 45633267325STejun Heo * 45733267325STejun Heo * Force horkage according to libata.force and whine about it. 45833267325STejun Heo * For consistency with link selection, device number 15 selects 45933267325STejun Heo * the first device connected to the host link. 46033267325STejun Heo * 46133267325STejun Heo * LOCKING: 46233267325STejun Heo * EH context. 46333267325STejun Heo */ 46433267325STejun Heo static void ata_force_horkage(struct ata_device *dev) 46533267325STejun Heo { 46633267325STejun Heo int devno = dev->link->pmp + dev->devno; 46733267325STejun Heo int alt_devno = devno; 46833267325STejun Heo int i; 46933267325STejun Heo 470b1c72916STejun Heo /* allow n.15/16 for devices attached to host port */ 471b1c72916STejun Heo if (ata_is_host_link(dev->link)) 472b1c72916STejun Heo alt_devno += 15; 47333267325STejun Heo 47433267325STejun Heo for (i = 0; i < ata_force_tbl_size; i++) { 47533267325STejun Heo const struct ata_force_ent *fe = &ata_force_tbl[i]; 47633267325STejun Heo 47733267325STejun Heo if (fe->port != -1 && fe->port != dev->link->ap->print_id) 47833267325STejun Heo continue; 47933267325STejun Heo 48033267325STejun Heo if (fe->device != -1 && fe->device != devno && 48133267325STejun Heo fe->device != alt_devno) 48233267325STejun Heo continue; 48333267325STejun Heo 48433267325STejun Heo if (!(~dev->horkage & fe->param.horkage_on) && 48533267325STejun Heo !(dev->horkage & fe->param.horkage_off)) 48633267325STejun Heo continue; 48733267325STejun Heo 48833267325STejun Heo dev->horkage |= fe->param.horkage_on; 48933267325STejun Heo dev->horkage &= ~fe->param.horkage_off; 49033267325STejun Heo 49133267325STejun Heo ata_dev_printk(dev, KERN_NOTICE, 49233267325STejun Heo "FORCE: horkage modified (%s)\n", fe->param.name); 49333267325STejun Heo } 49433267325STejun Heo } 49533267325STejun Heo 49633267325STejun Heo /** 497436d34b3STejun Heo * atapi_cmd_type - Determine ATAPI command type from SCSI opcode 498436d34b3STejun Heo * @opcode: SCSI opcode 499436d34b3STejun Heo * 500436d34b3STejun Heo * Determine ATAPI command type from @opcode. 501436d34b3STejun Heo * 502436d34b3STejun Heo * LOCKING: 503436d34b3STejun Heo * None. 504436d34b3STejun Heo * 505436d34b3STejun Heo * RETURNS: 506436d34b3STejun Heo * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} 507436d34b3STejun Heo */ 508436d34b3STejun Heo int atapi_cmd_type(u8 opcode) 509436d34b3STejun Heo { 510436d34b3STejun Heo switch (opcode) { 511436d34b3STejun Heo case GPCMD_READ_10: 512436d34b3STejun Heo case GPCMD_READ_12: 513436d34b3STejun Heo return ATAPI_READ; 514436d34b3STejun Heo 515436d34b3STejun Heo case GPCMD_WRITE_10: 516436d34b3STejun Heo case GPCMD_WRITE_12: 517436d34b3STejun Heo case GPCMD_WRITE_AND_VERIFY_10: 518436d34b3STejun Heo return ATAPI_WRITE; 519436d34b3STejun Heo 520436d34b3STejun Heo case GPCMD_READ_CD: 521436d34b3STejun Heo case GPCMD_READ_CD_MSF: 522436d34b3STejun Heo return ATAPI_READ_CD; 523436d34b3STejun Heo 524e52dcc48STejun Heo case ATA_16: 525e52dcc48STejun Heo case ATA_12: 526e52dcc48STejun Heo if (atapi_passthru16) 527e52dcc48STejun Heo return ATAPI_PASS_THRU; 528e52dcc48STejun Heo /* fall thru */ 529436d34b3STejun Heo default: 530436d34b3STejun Heo return ATAPI_MISC; 531436d34b3STejun Heo } 532436d34b3STejun Heo } 533436d34b3STejun Heo 534436d34b3STejun Heo /** 535c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 536c6fd2807SJeff Garzik * @tf: Taskfile to convert 537c6fd2807SJeff Garzik * @pmp: Port multiplier port 5389977126cSTejun Heo * @is_cmd: This FIS is for command 5399977126cSTejun Heo * @fis: Buffer into which data will output 540c6fd2807SJeff Garzik * 541c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 542c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 543c6fd2807SJeff Garzik * 544c6fd2807SJeff Garzik * LOCKING: 545c6fd2807SJeff Garzik * Inherited from caller. 546c6fd2807SJeff Garzik */ 5479977126cSTejun Heo void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) 548c6fd2807SJeff Garzik { 549c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 5509977126cSTejun Heo fis[1] = pmp & 0xf; /* Port multiplier number*/ 5519977126cSTejun Heo if (is_cmd) 5529977126cSTejun Heo fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ 5539977126cSTejun Heo 554c6fd2807SJeff Garzik fis[2] = tf->command; 555c6fd2807SJeff Garzik fis[3] = tf->feature; 556c6fd2807SJeff Garzik 557c6fd2807SJeff Garzik fis[4] = tf->lbal; 558c6fd2807SJeff Garzik fis[5] = tf->lbam; 559c6fd2807SJeff Garzik fis[6] = tf->lbah; 560c6fd2807SJeff Garzik fis[7] = tf->device; 561c6fd2807SJeff Garzik 562c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 563c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 564c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 565c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 566c6fd2807SJeff Garzik 567c6fd2807SJeff Garzik fis[12] = tf->nsect; 568c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 569c6fd2807SJeff Garzik fis[14] = 0; 570c6fd2807SJeff Garzik fis[15] = tf->ctl; 571c6fd2807SJeff Garzik 572c6fd2807SJeff Garzik fis[16] = 0; 573c6fd2807SJeff Garzik fis[17] = 0; 574c6fd2807SJeff Garzik fis[18] = 0; 575c6fd2807SJeff Garzik fis[19] = 0; 576c6fd2807SJeff Garzik } 577c6fd2807SJeff Garzik 578c6fd2807SJeff Garzik /** 579c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 580c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 581c6fd2807SJeff Garzik * @tf: Taskfile to output 582c6fd2807SJeff Garzik * 583c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 584c6fd2807SJeff Garzik * 585c6fd2807SJeff Garzik * LOCKING: 586c6fd2807SJeff Garzik * Inherited from caller. 587c6fd2807SJeff Garzik */ 588c6fd2807SJeff Garzik 589c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 590c6fd2807SJeff Garzik { 591c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 592c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 593c6fd2807SJeff Garzik 594c6fd2807SJeff Garzik tf->lbal = fis[4]; 595c6fd2807SJeff Garzik tf->lbam = fis[5]; 596c6fd2807SJeff Garzik tf->lbah = fis[6]; 597c6fd2807SJeff Garzik tf->device = fis[7]; 598c6fd2807SJeff Garzik 599c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 600c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 601c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 602c6fd2807SJeff Garzik 603c6fd2807SJeff Garzik tf->nsect = fis[12]; 604c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 605c6fd2807SJeff Garzik } 606c6fd2807SJeff Garzik 607c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 608c6fd2807SJeff Garzik /* pio multi */ 609c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 610c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 611c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 612c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 613c6fd2807SJeff Garzik 0, 614c6fd2807SJeff Garzik 0, 615c6fd2807SJeff Garzik 0, 616c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 617c6fd2807SJeff Garzik /* pio */ 618c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 619c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 620c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 621c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 622c6fd2807SJeff Garzik 0, 623c6fd2807SJeff Garzik 0, 624c6fd2807SJeff Garzik 0, 625c6fd2807SJeff Garzik 0, 626c6fd2807SJeff Garzik /* dma */ 627c6fd2807SJeff Garzik ATA_CMD_READ, 628c6fd2807SJeff Garzik ATA_CMD_WRITE, 629c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 630c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 631c6fd2807SJeff Garzik 0, 632c6fd2807SJeff Garzik 0, 633c6fd2807SJeff Garzik 0, 634c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 635c6fd2807SJeff Garzik }; 636c6fd2807SJeff Garzik 637c6fd2807SJeff Garzik /** 638c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 639bd056d7eSTejun Heo * @tf: command to examine and configure 640bd056d7eSTejun Heo * @dev: device tf belongs to 641c6fd2807SJeff Garzik * 642c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 643c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 644c6fd2807SJeff Garzik * 645c6fd2807SJeff Garzik * LOCKING: 646c6fd2807SJeff Garzik * caller. 647c6fd2807SJeff Garzik */ 648bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 649c6fd2807SJeff Garzik { 650c6fd2807SJeff Garzik u8 cmd; 651c6fd2807SJeff Garzik 652c6fd2807SJeff Garzik int index, fua, lba48, write; 653c6fd2807SJeff Garzik 654c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 655c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 656c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 657c6fd2807SJeff Garzik 658c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 659c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 660c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 6619af5c9c9STejun Heo } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 662c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 663c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 664c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 665c6fd2807SJeff Garzik } else { 666c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 667c6fd2807SJeff Garzik index = 16; 668c6fd2807SJeff Garzik } 669c6fd2807SJeff Garzik 670c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 671c6fd2807SJeff Garzik if (cmd) { 672c6fd2807SJeff Garzik tf->command = cmd; 673c6fd2807SJeff Garzik return 0; 674c6fd2807SJeff Garzik } 675c6fd2807SJeff Garzik return -1; 676c6fd2807SJeff Garzik } 677c6fd2807SJeff Garzik 678c6fd2807SJeff Garzik /** 67935b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 68035b649feSTejun Heo * @tf: ATA taskfile of interest 68135b649feSTejun Heo * @dev: ATA device @tf belongs to 68235b649feSTejun Heo * 68335b649feSTejun Heo * LOCKING: 68435b649feSTejun Heo * None. 68535b649feSTejun Heo * 68635b649feSTejun Heo * Read block address from @tf. This function can handle all 68735b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 68835b649feSTejun Heo * flags select the address format to use. 68935b649feSTejun Heo * 69035b649feSTejun Heo * RETURNS: 69135b649feSTejun Heo * Block address read from @tf. 69235b649feSTejun Heo */ 69335b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 69435b649feSTejun Heo { 69535b649feSTejun Heo u64 block = 0; 69635b649feSTejun Heo 69735b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 69835b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 69935b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 70035b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 70144901a96SRoland Dreier block |= (u64)tf->hob_lbal << 24; 70235b649feSTejun Heo } else 70335b649feSTejun Heo block |= (tf->device & 0xf) << 24; 70435b649feSTejun Heo 70535b649feSTejun Heo block |= tf->lbah << 16; 70635b649feSTejun Heo block |= tf->lbam << 8; 70735b649feSTejun Heo block |= tf->lbal; 70835b649feSTejun Heo } else { 70935b649feSTejun Heo u32 cyl, head, sect; 71035b649feSTejun Heo 71135b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 71235b649feSTejun Heo head = tf->device & 0xf; 71335b649feSTejun Heo sect = tf->lbal; 71435b649feSTejun Heo 715ac8672eaSTejun Heo if (!sect) { 716ac8672eaSTejun Heo ata_dev_printk(dev, KERN_WARNING, "device reported " 717ac8672eaSTejun Heo "invalid CHS sector 0\n"); 718ac8672eaSTejun Heo sect = 1; /* oh well */ 719ac8672eaSTejun Heo } 720ac8672eaSTejun Heo 721ac8672eaSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect - 1; 72235b649feSTejun Heo } 72335b649feSTejun Heo 72435b649feSTejun Heo return block; 72535b649feSTejun Heo } 72635b649feSTejun Heo 72735b649feSTejun Heo /** 728bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 729bd056d7eSTejun Heo * @tf: Target ATA taskfile 730bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 731bd056d7eSTejun Heo * @block: Block address 732bd056d7eSTejun Heo * @n_block: Number of blocks 733bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 734bd056d7eSTejun Heo * @tag: tag 735bd056d7eSTejun Heo * 736bd056d7eSTejun Heo * LOCKING: 737bd056d7eSTejun Heo * None. 738bd056d7eSTejun Heo * 739bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 740bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 741bd056d7eSTejun Heo * 742bd056d7eSTejun Heo * RETURNS: 743bd056d7eSTejun Heo * 744bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 745bd056d7eSTejun Heo * -EINVAL if the request is invalid. 746bd056d7eSTejun Heo */ 747bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 748bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 749bd056d7eSTejun Heo unsigned int tag) 750bd056d7eSTejun Heo { 751bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 752bd056d7eSTejun Heo tf->flags |= tf_flags; 753bd056d7eSTejun Heo 7546d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 755bd056d7eSTejun Heo /* yay, NCQ */ 756bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 757bd056d7eSTejun Heo return -ERANGE; 758bd056d7eSTejun Heo 759bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 760bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 761bd056d7eSTejun Heo 762bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 763bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 764bd056d7eSTejun Heo else 765bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 766bd056d7eSTejun Heo 767bd056d7eSTejun Heo tf->nsect = tag << 3; 768bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 769bd056d7eSTejun Heo tf->feature = n_block & 0xff; 770bd056d7eSTejun Heo 771bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 772bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 773bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 774bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 775bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 776bd056d7eSTejun Heo tf->lbal = block & 0xff; 777bd056d7eSTejun Heo 778bd056d7eSTejun Heo tf->device = 1 << 6; 779bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 780bd056d7eSTejun Heo tf->device |= 1 << 7; 781bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 782bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 783bd056d7eSTejun Heo 784bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 785bd056d7eSTejun Heo /* use LBA28 */ 786bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 787bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 788bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 789bd056d7eSTejun Heo return -ERANGE; 790bd056d7eSTejun Heo 791bd056d7eSTejun Heo /* use LBA48 */ 792bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 793bd056d7eSTejun Heo 794bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 795bd056d7eSTejun Heo 796bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 797bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 798bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 799bd056d7eSTejun Heo } else 800bd056d7eSTejun Heo /* request too large even for LBA48 */ 801bd056d7eSTejun Heo return -ERANGE; 802bd056d7eSTejun Heo 803bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 804bd056d7eSTejun Heo return -EINVAL; 805bd056d7eSTejun Heo 806bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 807bd056d7eSTejun Heo 808bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 809bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 810bd056d7eSTejun Heo tf->lbal = block & 0xff; 811bd056d7eSTejun Heo 812bd056d7eSTejun Heo tf->device |= ATA_LBA; 813bd056d7eSTejun Heo } else { 814bd056d7eSTejun Heo /* CHS */ 815bd056d7eSTejun Heo u32 sect, head, cyl, track; 816bd056d7eSTejun Heo 817bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 818bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 819bd056d7eSTejun Heo return -ERANGE; 820bd056d7eSTejun Heo 821bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 822bd056d7eSTejun Heo return -EINVAL; 823bd056d7eSTejun Heo 824bd056d7eSTejun Heo /* Convert LBA to CHS */ 825bd056d7eSTejun Heo track = (u32)block / dev->sectors; 826bd056d7eSTejun Heo cyl = track / dev->heads; 827bd056d7eSTejun Heo head = track % dev->heads; 828bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 829bd056d7eSTejun Heo 830bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 831bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 832bd056d7eSTejun Heo 833bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 834bd056d7eSTejun Heo Cylinder: 0-65535 835bd056d7eSTejun Heo Head: 0-15 836bd056d7eSTejun Heo Sector: 1-255*/ 837bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 838bd056d7eSTejun Heo return -ERANGE; 839bd056d7eSTejun Heo 840bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 841bd056d7eSTejun Heo tf->lbal = sect; 842bd056d7eSTejun Heo tf->lbam = cyl; 843bd056d7eSTejun Heo tf->lbah = cyl >> 8; 844bd056d7eSTejun Heo tf->device |= head; 845bd056d7eSTejun Heo } 846bd056d7eSTejun Heo 847bd056d7eSTejun Heo return 0; 848bd056d7eSTejun Heo } 849bd056d7eSTejun Heo 850bd056d7eSTejun Heo /** 851c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 852c6fd2807SJeff Garzik * @pio_mask: pio_mask 853c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 854c6fd2807SJeff Garzik * @udma_mask: udma_mask 855c6fd2807SJeff Garzik * 856c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 857c6fd2807SJeff Garzik * unsigned int xfer_mask. 858c6fd2807SJeff Garzik * 859c6fd2807SJeff Garzik * LOCKING: 860c6fd2807SJeff Garzik * None. 861c6fd2807SJeff Garzik * 862c6fd2807SJeff Garzik * RETURNS: 863c6fd2807SJeff Garzik * Packed xfer_mask. 864c6fd2807SJeff Garzik */ 8657dc951aeSTejun Heo unsigned long ata_pack_xfermask(unsigned long pio_mask, 8667dc951aeSTejun Heo unsigned long mwdma_mask, 8677dc951aeSTejun Heo unsigned long udma_mask) 868c6fd2807SJeff Garzik { 869c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 870c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 871c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 872c6fd2807SJeff Garzik } 873c6fd2807SJeff Garzik 874c6fd2807SJeff Garzik /** 875c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 876c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 877c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 878c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 879c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 880c6fd2807SJeff Garzik * 881c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 882c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 883c6fd2807SJeff Garzik */ 8847dc951aeSTejun Heo void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, 8857dc951aeSTejun Heo unsigned long *mwdma_mask, unsigned long *udma_mask) 886c6fd2807SJeff Garzik { 887c6fd2807SJeff Garzik if (pio_mask) 888c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 889c6fd2807SJeff Garzik if (mwdma_mask) 890c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 891c6fd2807SJeff Garzik if (udma_mask) 892c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 893c6fd2807SJeff Garzik } 894c6fd2807SJeff Garzik 895c6fd2807SJeff Garzik static const struct ata_xfer_ent { 896c6fd2807SJeff Garzik int shift, bits; 897c6fd2807SJeff Garzik u8 base; 898c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 89970cd071eSTejun Heo { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 90070cd071eSTejun Heo { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 90170cd071eSTejun Heo { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 902c6fd2807SJeff Garzik { -1, }, 903c6fd2807SJeff Garzik }; 904c6fd2807SJeff Garzik 905c6fd2807SJeff Garzik /** 906c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 907c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 908c6fd2807SJeff Garzik * 909c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 910c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 911c6fd2807SJeff Garzik * 912c6fd2807SJeff Garzik * LOCKING: 913c6fd2807SJeff Garzik * None. 914c6fd2807SJeff Garzik * 915c6fd2807SJeff Garzik * RETURNS: 91670cd071eSTejun Heo * Matching XFER_* value, 0xff if no match found. 917c6fd2807SJeff Garzik */ 9187dc951aeSTejun Heo u8 ata_xfer_mask2mode(unsigned long xfer_mask) 919c6fd2807SJeff Garzik { 920c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 921c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 922c6fd2807SJeff Garzik 923c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 924c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 925c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 92670cd071eSTejun Heo return 0xff; 927c6fd2807SJeff Garzik } 928c6fd2807SJeff Garzik 929c6fd2807SJeff Garzik /** 930c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 931c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 932c6fd2807SJeff Garzik * 933c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 934c6fd2807SJeff Garzik * 935c6fd2807SJeff Garzik * LOCKING: 936c6fd2807SJeff Garzik * None. 937c6fd2807SJeff Garzik * 938c6fd2807SJeff Garzik * RETURNS: 939c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 940c6fd2807SJeff Garzik */ 9417dc951aeSTejun Heo unsigned long ata_xfer_mode2mask(u8 xfer_mode) 942c6fd2807SJeff Garzik { 943c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 944c6fd2807SJeff Garzik 945c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 946c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 94770cd071eSTejun Heo return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 94870cd071eSTejun Heo & ~((1 << ent->shift) - 1); 949c6fd2807SJeff Garzik return 0; 950c6fd2807SJeff Garzik } 951c6fd2807SJeff Garzik 952c6fd2807SJeff Garzik /** 953c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 954c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 955c6fd2807SJeff Garzik * 956c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 957c6fd2807SJeff Garzik * 958c6fd2807SJeff Garzik * LOCKING: 959c6fd2807SJeff Garzik * None. 960c6fd2807SJeff Garzik * 961c6fd2807SJeff Garzik * RETURNS: 962c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 963c6fd2807SJeff Garzik */ 9647dc951aeSTejun Heo int ata_xfer_mode2shift(unsigned long xfer_mode) 965c6fd2807SJeff Garzik { 966c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 967c6fd2807SJeff Garzik 968c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 969c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 970c6fd2807SJeff Garzik return ent->shift; 971c6fd2807SJeff Garzik return -1; 972c6fd2807SJeff Garzik } 973c6fd2807SJeff Garzik 974c6fd2807SJeff Garzik /** 975c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 976c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 977c6fd2807SJeff Garzik * 978c6fd2807SJeff Garzik * Determine string which represents the highest speed 979c6fd2807SJeff Garzik * (highest bit in @modemask). 980c6fd2807SJeff Garzik * 981c6fd2807SJeff Garzik * LOCKING: 982c6fd2807SJeff Garzik * None. 983c6fd2807SJeff Garzik * 984c6fd2807SJeff Garzik * RETURNS: 985c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 986c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 987c6fd2807SJeff Garzik */ 9887dc951aeSTejun Heo const char *ata_mode_string(unsigned long xfer_mask) 989c6fd2807SJeff Garzik { 990c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 991c6fd2807SJeff Garzik "PIO0", 992c6fd2807SJeff Garzik "PIO1", 993c6fd2807SJeff Garzik "PIO2", 994c6fd2807SJeff Garzik "PIO3", 995c6fd2807SJeff Garzik "PIO4", 996b352e57dSAlan Cox "PIO5", 997b352e57dSAlan Cox "PIO6", 998c6fd2807SJeff Garzik "MWDMA0", 999c6fd2807SJeff Garzik "MWDMA1", 1000c6fd2807SJeff Garzik "MWDMA2", 1001b352e57dSAlan Cox "MWDMA3", 1002b352e57dSAlan Cox "MWDMA4", 1003c6fd2807SJeff Garzik "UDMA/16", 1004c6fd2807SJeff Garzik "UDMA/25", 1005c6fd2807SJeff Garzik "UDMA/33", 1006c6fd2807SJeff Garzik "UDMA/44", 1007c6fd2807SJeff Garzik "UDMA/66", 1008c6fd2807SJeff Garzik "UDMA/100", 1009c6fd2807SJeff Garzik "UDMA/133", 1010c6fd2807SJeff Garzik "UDMA7", 1011c6fd2807SJeff Garzik }; 1012c6fd2807SJeff Garzik int highbit; 1013c6fd2807SJeff Garzik 1014c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 1015c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 1016c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 1017c6fd2807SJeff Garzik return "<n/a>"; 1018c6fd2807SJeff Garzik } 1019c6fd2807SJeff Garzik 1020c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 1021c6fd2807SJeff Garzik { 1022c6fd2807SJeff Garzik static const char * const spd_str[] = { 1023c6fd2807SJeff Garzik "1.5 Gbps", 1024c6fd2807SJeff Garzik "3.0 Gbps", 10258522ee25SShane Huang "6.0 Gbps", 1026c6fd2807SJeff Garzik }; 1027c6fd2807SJeff Garzik 1028c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 1029c6fd2807SJeff Garzik return "<unknown>"; 1030c6fd2807SJeff Garzik return spd_str[spd - 1]; 1031c6fd2807SJeff Garzik } 1032c6fd2807SJeff Garzik 1033ca77329fSKristen Carlson Accardi static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) 1034ca77329fSKristen Carlson Accardi { 1035ca77329fSKristen Carlson Accardi struct ata_link *link = dev->link; 1036ca77329fSKristen Carlson Accardi struct ata_port *ap = link->ap; 1037ca77329fSKristen Carlson Accardi u32 scontrol; 1038ca77329fSKristen Carlson Accardi unsigned int err_mask; 1039ca77329fSKristen Carlson Accardi int rc; 1040ca77329fSKristen Carlson Accardi 1041ca77329fSKristen Carlson Accardi /* 1042ca77329fSKristen Carlson Accardi * disallow DIPM for drivers which haven't set 1043ca77329fSKristen Carlson Accardi * ATA_FLAG_IPM. This is because when DIPM is enabled, 1044ca77329fSKristen Carlson Accardi * phy ready will be set in the interrupt status on 1045ca77329fSKristen Carlson Accardi * state changes, which will cause some drivers to 1046ca77329fSKristen Carlson Accardi * think there are errors - additionally drivers will 1047ca77329fSKristen Carlson Accardi * need to disable hot plug. 1048ca77329fSKristen Carlson Accardi */ 1049ca77329fSKristen Carlson Accardi if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { 1050ca77329fSKristen Carlson Accardi ap->pm_policy = NOT_AVAILABLE; 1051ca77329fSKristen Carlson Accardi return -EINVAL; 1052ca77329fSKristen Carlson Accardi } 1053ca77329fSKristen Carlson Accardi 1054ca77329fSKristen Carlson Accardi /* 1055ca77329fSKristen Carlson Accardi * For DIPM, we will only enable it for the 1056ca77329fSKristen Carlson Accardi * min_power setting. 1057ca77329fSKristen Carlson Accardi * 1058ca77329fSKristen Carlson Accardi * Why? Because Disks are too stupid to know that 1059ca77329fSKristen Carlson Accardi * If the host rejects a request to go to SLUMBER 1060ca77329fSKristen Carlson Accardi * they should retry at PARTIAL, and instead it 1061ca77329fSKristen Carlson Accardi * just would give up. So, for medium_power to 1062ca77329fSKristen Carlson Accardi * work at all, we need to only allow HIPM. 1063ca77329fSKristen Carlson Accardi */ 1064ca77329fSKristen Carlson Accardi rc = sata_scr_read(link, SCR_CONTROL, &scontrol); 1065ca77329fSKristen Carlson Accardi if (rc) 1066ca77329fSKristen Carlson Accardi return rc; 1067ca77329fSKristen Carlson Accardi 1068ca77329fSKristen Carlson Accardi switch (policy) { 1069ca77329fSKristen Carlson Accardi case MIN_POWER: 1070ca77329fSKristen Carlson Accardi /* no restrictions on IPM transitions */ 1071ca77329fSKristen Carlson Accardi scontrol &= ~(0x3 << 8); 1072ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 1073ca77329fSKristen Carlson Accardi if (rc) 1074ca77329fSKristen Carlson Accardi return rc; 1075ca77329fSKristen Carlson Accardi 1076ca77329fSKristen Carlson Accardi /* enable DIPM */ 1077ca77329fSKristen Carlson Accardi if (dev->flags & ATA_DFLAG_DIPM) 1078ca77329fSKristen Carlson Accardi err_mask = ata_dev_set_feature(dev, 1079ca77329fSKristen Carlson Accardi SETFEATURES_SATA_ENABLE, SATA_DIPM); 1080ca77329fSKristen Carlson Accardi break; 1081ca77329fSKristen Carlson Accardi case MEDIUM_POWER: 1082ca77329fSKristen Carlson Accardi /* allow IPM to PARTIAL */ 1083ca77329fSKristen Carlson Accardi scontrol &= ~(0x1 << 8); 1084ca77329fSKristen Carlson Accardi scontrol |= (0x2 << 8); 1085ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 1086ca77329fSKristen Carlson Accardi if (rc) 1087ca77329fSKristen Carlson Accardi return rc; 1088ca77329fSKristen Carlson Accardi 1089f5456b63SKristen Carlson Accardi /* 1090f5456b63SKristen Carlson Accardi * we don't have to disable DIPM since IPM flags 1091f5456b63SKristen Carlson Accardi * disallow transitions to SLUMBER, which effectively 1092f5456b63SKristen Carlson Accardi * disable DIPM if it does not support PARTIAL 1093f5456b63SKristen Carlson Accardi */ 1094ca77329fSKristen Carlson Accardi break; 1095ca77329fSKristen Carlson Accardi case NOT_AVAILABLE: 1096ca77329fSKristen Carlson Accardi case MAX_PERFORMANCE: 1097ca77329fSKristen Carlson Accardi /* disable all IPM transitions */ 1098ca77329fSKristen Carlson Accardi scontrol |= (0x3 << 8); 1099ca77329fSKristen Carlson Accardi rc = sata_scr_write(link, SCR_CONTROL, scontrol); 1100ca77329fSKristen Carlson Accardi if (rc) 1101ca77329fSKristen Carlson Accardi return rc; 1102ca77329fSKristen Carlson Accardi 1103f5456b63SKristen Carlson Accardi /* 1104f5456b63SKristen Carlson Accardi * we don't have to disable DIPM since IPM flags 1105f5456b63SKristen Carlson Accardi * disallow all transitions which effectively 1106f5456b63SKristen Carlson Accardi * disable DIPM anyway. 1107f5456b63SKristen Carlson Accardi */ 1108ca77329fSKristen Carlson Accardi break; 1109ca77329fSKristen Carlson Accardi } 1110ca77329fSKristen Carlson Accardi 1111ca77329fSKristen Carlson Accardi /* FIXME: handle SET FEATURES failure */ 1112ca77329fSKristen Carlson Accardi (void) err_mask; 1113ca77329fSKristen Carlson Accardi 1114ca77329fSKristen Carlson Accardi return 0; 1115ca77329fSKristen Carlson Accardi } 1116ca77329fSKristen Carlson Accardi 1117ca77329fSKristen Carlson Accardi /** 1118ca77329fSKristen Carlson Accardi * ata_dev_enable_pm - enable SATA interface power management 111948166fd9SStephen Hemminger * @dev: device to enable power management 112048166fd9SStephen Hemminger * @policy: the link power management policy 1121ca77329fSKristen Carlson Accardi * 1122ca77329fSKristen Carlson Accardi * Enable SATA Interface power management. This will enable 1123ca77329fSKristen Carlson Accardi * Device Interface Power Management (DIPM) for min_power 1124ca77329fSKristen Carlson Accardi * policy, and then call driver specific callbacks for 1125ca77329fSKristen Carlson Accardi * enabling Host Initiated Power management. 1126ca77329fSKristen Carlson Accardi * 1127ca77329fSKristen Carlson Accardi * Locking: Caller. 1128ca77329fSKristen Carlson Accardi * Returns: -EINVAL if IPM is not supported, 0 otherwise. 1129ca77329fSKristen Carlson Accardi */ 1130ca77329fSKristen Carlson Accardi void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) 1131ca77329fSKristen Carlson Accardi { 1132ca77329fSKristen Carlson Accardi int rc = 0; 1133ca77329fSKristen Carlson Accardi struct ata_port *ap = dev->link->ap; 1134ca77329fSKristen Carlson Accardi 1135ca77329fSKristen Carlson Accardi /* set HIPM first, then DIPM */ 1136ca77329fSKristen Carlson Accardi if (ap->ops->enable_pm) 1137ca77329fSKristen Carlson Accardi rc = ap->ops->enable_pm(ap, policy); 1138ca77329fSKristen Carlson Accardi if (rc) 1139ca77329fSKristen Carlson Accardi goto enable_pm_out; 1140ca77329fSKristen Carlson Accardi rc = ata_dev_set_dipm(dev, policy); 1141ca77329fSKristen Carlson Accardi 1142ca77329fSKristen Carlson Accardi enable_pm_out: 1143ca77329fSKristen Carlson Accardi if (rc) 1144ca77329fSKristen Carlson Accardi ap->pm_policy = MAX_PERFORMANCE; 1145ca77329fSKristen Carlson Accardi else 1146ca77329fSKristen Carlson Accardi ap->pm_policy = policy; 1147ca77329fSKristen Carlson Accardi return /* rc */; /* hopefully we can use 'rc' eventually */ 1148ca77329fSKristen Carlson Accardi } 1149ca77329fSKristen Carlson Accardi 11501992a5edSStephen Rothwell #ifdef CONFIG_PM 1151ca77329fSKristen Carlson Accardi /** 1152ca77329fSKristen Carlson Accardi * ata_dev_disable_pm - disable SATA interface power management 115348166fd9SStephen Hemminger * @dev: device to disable power management 1154ca77329fSKristen Carlson Accardi * 1155ca77329fSKristen Carlson Accardi * Disable SATA Interface power management. This will disable 1156ca77329fSKristen Carlson Accardi * Device Interface Power Management (DIPM) without changing 1157ca77329fSKristen Carlson Accardi * policy, call driver specific callbacks for disabling Host 1158ca77329fSKristen Carlson Accardi * Initiated Power management. 1159ca77329fSKristen Carlson Accardi * 1160ca77329fSKristen Carlson Accardi * Locking: Caller. 1161ca77329fSKristen Carlson Accardi * Returns: void 1162ca77329fSKristen Carlson Accardi */ 1163ca77329fSKristen Carlson Accardi static void ata_dev_disable_pm(struct ata_device *dev) 1164ca77329fSKristen Carlson Accardi { 1165ca77329fSKristen Carlson Accardi struct ata_port *ap = dev->link->ap; 1166ca77329fSKristen Carlson Accardi 1167ca77329fSKristen Carlson Accardi ata_dev_set_dipm(dev, MAX_PERFORMANCE); 1168ca77329fSKristen Carlson Accardi if (ap->ops->disable_pm) 1169ca77329fSKristen Carlson Accardi ap->ops->disable_pm(ap); 1170ca77329fSKristen Carlson Accardi } 11711992a5edSStephen Rothwell #endif /* CONFIG_PM */ 1172ca77329fSKristen Carlson Accardi 1173ca77329fSKristen Carlson Accardi void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) 1174ca77329fSKristen Carlson Accardi { 1175ca77329fSKristen Carlson Accardi ap->pm_policy = policy; 11763ec25ebdSTejun Heo ap->link.eh_info.action |= ATA_EH_LPM; 1177ca77329fSKristen Carlson Accardi ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; 1178ca77329fSKristen Carlson Accardi ata_port_schedule_eh(ap); 1179ca77329fSKristen Carlson Accardi } 1180ca77329fSKristen Carlson Accardi 11811992a5edSStephen Rothwell #ifdef CONFIG_PM 1182ca77329fSKristen Carlson Accardi static void ata_lpm_enable(struct ata_host *host) 1183ca77329fSKristen Carlson Accardi { 1184ca77329fSKristen Carlson Accardi struct ata_link *link; 1185ca77329fSKristen Carlson Accardi struct ata_port *ap; 1186ca77329fSKristen Carlson Accardi struct ata_device *dev; 1187ca77329fSKristen Carlson Accardi int i; 1188ca77329fSKristen Carlson Accardi 1189ca77329fSKristen Carlson Accardi for (i = 0; i < host->n_ports; i++) { 1190ca77329fSKristen Carlson Accardi ap = host->ports[i]; 11911eca4365STejun Heo ata_for_each_link(link, ap, EDGE) { 11921eca4365STejun Heo ata_for_each_dev(dev, link, ALL) 1193ca77329fSKristen Carlson Accardi ata_dev_disable_pm(dev); 1194ca77329fSKristen Carlson Accardi } 1195ca77329fSKristen Carlson Accardi } 1196ca77329fSKristen Carlson Accardi } 1197ca77329fSKristen Carlson Accardi 1198ca77329fSKristen Carlson Accardi static void ata_lpm_disable(struct ata_host *host) 1199ca77329fSKristen Carlson Accardi { 1200ca77329fSKristen Carlson Accardi int i; 1201ca77329fSKristen Carlson Accardi 1202ca77329fSKristen Carlson Accardi for (i = 0; i < host->n_ports; i++) { 1203ca77329fSKristen Carlson Accardi struct ata_port *ap = host->ports[i]; 1204ca77329fSKristen Carlson Accardi ata_lpm_schedule(ap, ap->pm_policy); 1205ca77329fSKristen Carlson Accardi } 1206ca77329fSKristen Carlson Accardi } 12071992a5edSStephen Rothwell #endif /* CONFIG_PM */ 1208ca77329fSKristen Carlson Accardi 1209c6fd2807SJeff Garzik /** 1210c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 1211c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 1212c6fd2807SJeff Garzik * 1213c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 1214c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 1215c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 1216c6fd2807SJeff Garzik * 1217c6fd2807SJeff Garzik * LOCKING: 1218c6fd2807SJeff Garzik * None. 1219c6fd2807SJeff Garzik * 1220c6fd2807SJeff Garzik * RETURNS: 1221633273a3STejun Heo * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or 1222633273a3STejun Heo * %ATA_DEV_UNKNOWN the event of failure. 1223c6fd2807SJeff Garzik */ 1224c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1225c6fd2807SJeff Garzik { 1226c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 1227c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 1228c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 1229633273a3STejun Heo * 1230633273a3STejun Heo * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1231633273a3STejun Heo * signatures for ATA and ATAPI devices attached on SerialATA, 1232633273a3STejun Heo * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1233633273a3STejun Heo * spec has never mentioned about using different signatures 1234633273a3STejun Heo * for ATA/ATAPI devices. Then, Serial ATA II: Port 1235633273a3STejun Heo * Multiplier specification began to use 0x69/0x96 to identify 1236633273a3STejun Heo * port multpliers and 0x3c/0xc3 to identify SEMB device. 1237633273a3STejun Heo * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1238633273a3STejun Heo * 0x69/0x96 shortly and described them as reserved for 1239633273a3STejun Heo * SerialATA. 1240633273a3STejun Heo * 1241633273a3STejun Heo * We follow the current spec and consider that 0x69/0x96 1242633273a3STejun Heo * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 124379b42babSTejun Heo * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports 124479b42babSTejun Heo * SEMB signature. This is worked around in 124579b42babSTejun Heo * ata_dev_read_id(). 1246c6fd2807SJeff Garzik */ 1247633273a3STejun Heo if ((tf->lbam == 0) && (tf->lbah == 0)) { 1248c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 1249c6fd2807SJeff Garzik return ATA_DEV_ATA; 1250c6fd2807SJeff Garzik } 1251c6fd2807SJeff Garzik 1252633273a3STejun Heo if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { 1253c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 1254c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 1255c6fd2807SJeff Garzik } 1256c6fd2807SJeff Garzik 1257633273a3STejun Heo if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { 1258633273a3STejun Heo DPRINTK("found PMP device by sig\n"); 1259633273a3STejun Heo return ATA_DEV_PMP; 1260633273a3STejun Heo } 1261633273a3STejun Heo 1262633273a3STejun Heo if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { 126379b42babSTejun Heo DPRINTK("found SEMB device by sig (could be ATA device)\n"); 126479b42babSTejun Heo return ATA_DEV_SEMB; 1265633273a3STejun Heo } 1266633273a3STejun Heo 1267c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 1268c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 1269c6fd2807SJeff Garzik } 1270c6fd2807SJeff Garzik 1271c6fd2807SJeff Garzik /** 1272c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 1273c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 1274c6fd2807SJeff Garzik * @s: string into which data is output 1275c6fd2807SJeff Garzik * @ofs: offset into identify device page 1276c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 1277c6fd2807SJeff Garzik * 1278c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 1279c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 1280c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 1281c6fd2807SJeff Garzik * 1282c6fd2807SJeff Garzik * LOCKING: 1283c6fd2807SJeff Garzik * caller. 1284c6fd2807SJeff Garzik */ 1285c6fd2807SJeff Garzik 1286c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 1287c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 1288c6fd2807SJeff Garzik { 1289c6fd2807SJeff Garzik unsigned int c; 1290c6fd2807SJeff Garzik 1291963e4975SAlan Cox BUG_ON(len & 1); 1292963e4975SAlan Cox 1293c6fd2807SJeff Garzik while (len > 0) { 1294c6fd2807SJeff Garzik c = id[ofs] >> 8; 1295c6fd2807SJeff Garzik *s = c; 1296c6fd2807SJeff Garzik s++; 1297c6fd2807SJeff Garzik 1298c6fd2807SJeff Garzik c = id[ofs] & 0xff; 1299c6fd2807SJeff Garzik *s = c; 1300c6fd2807SJeff Garzik s++; 1301c6fd2807SJeff Garzik 1302c6fd2807SJeff Garzik ofs++; 1303c6fd2807SJeff Garzik len -= 2; 1304c6fd2807SJeff Garzik } 1305c6fd2807SJeff Garzik } 1306c6fd2807SJeff Garzik 1307c6fd2807SJeff Garzik /** 1308c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1309c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 1310c6fd2807SJeff Garzik * @s: string into which data is output 1311c6fd2807SJeff Garzik * @ofs: offset into identify device page 1312c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 1313c6fd2807SJeff Garzik * 1314c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 1315c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 1316c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 1317c6fd2807SJeff Garzik * 1318c6fd2807SJeff Garzik * LOCKING: 1319c6fd2807SJeff Garzik * caller. 1320c6fd2807SJeff Garzik */ 1321c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 1322c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 1323c6fd2807SJeff Garzik { 1324c6fd2807SJeff Garzik unsigned char *p; 1325c6fd2807SJeff Garzik 1326c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 1327c6fd2807SJeff Garzik 1328c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 1329c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 1330c6fd2807SJeff Garzik p--; 1331c6fd2807SJeff Garzik *p = '\0'; 1332c6fd2807SJeff Garzik } 1333c6fd2807SJeff Garzik 1334db6f8759STejun Heo static u64 ata_id_n_sectors(const u16 *id) 1335db6f8759STejun Heo { 1336db6f8759STejun Heo if (ata_id_has_lba(id)) { 1337db6f8759STejun Heo if (ata_id_has_lba48(id)) 1338968e594aSRobert Hancock return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 1339db6f8759STejun Heo else 1340968e594aSRobert Hancock return ata_id_u32(id, ATA_ID_LBA_CAPACITY); 1341db6f8759STejun Heo } else { 1342db6f8759STejun Heo if (ata_id_current_chs_valid(id)) 1343968e594aSRobert Hancock return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * 1344968e594aSRobert Hancock id[ATA_ID_CUR_SECTORS]; 1345db6f8759STejun Heo else 1346968e594aSRobert Hancock return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * 1347968e594aSRobert Hancock id[ATA_ID_SECTORS]; 1348db6f8759STejun Heo } 1349db6f8759STejun Heo } 1350db6f8759STejun Heo 1351a5987e0aSTejun Heo u64 ata_tf_to_lba48(const struct ata_taskfile *tf) 13521e999736SAlan Cox { 13531e999736SAlan Cox u64 sectors = 0; 13541e999736SAlan Cox 13551e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 13561e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 1357ba14a9c2SRoland Dreier sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; 13581e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 13591e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 13601e999736SAlan Cox sectors |= (tf->lbal & 0xff); 13611e999736SAlan Cox 1362a5987e0aSTejun Heo return sectors; 13631e999736SAlan Cox } 13641e999736SAlan Cox 1365a5987e0aSTejun Heo u64 ata_tf_to_lba(const struct ata_taskfile *tf) 13661e999736SAlan Cox { 13671e999736SAlan Cox u64 sectors = 0; 13681e999736SAlan Cox 13691e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 13701e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 13711e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 13721e999736SAlan Cox sectors |= (tf->lbal & 0xff); 13731e999736SAlan Cox 1374a5987e0aSTejun Heo return sectors; 13751e999736SAlan Cox } 13761e999736SAlan Cox 13771e999736SAlan Cox /** 1378c728a914STejun Heo * ata_read_native_max_address - Read native max address 1379c728a914STejun Heo * @dev: target device 1380c728a914STejun Heo * @max_sectors: out parameter for the result native max address 13811e999736SAlan Cox * 1382c728a914STejun Heo * Perform an LBA48 or LBA28 native size query upon the device in 1383c728a914STejun Heo * question. 1384c728a914STejun Heo * 1385c728a914STejun Heo * RETURNS: 1386c728a914STejun Heo * 0 on success, -EACCES if command is aborted by the drive. 1387c728a914STejun Heo * -EIO on other errors. 13881e999736SAlan Cox */ 1389c728a914STejun Heo static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 13901e999736SAlan Cox { 1391c728a914STejun Heo unsigned int err_mask; 13921e999736SAlan Cox struct ata_taskfile tf; 1393c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 13941e999736SAlan Cox 13951e999736SAlan Cox ata_tf_init(dev, &tf); 13961e999736SAlan Cox 1397c728a914STejun Heo /* always clear all address registers */ 13981e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1399c728a914STejun Heo 1400c728a914STejun Heo if (lba48) { 1401c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 1402c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 1403c728a914STejun Heo } else 1404c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX; 1405c728a914STejun Heo 14061e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 1407c728a914STejun Heo tf.device |= ATA_LBA; 14081e999736SAlan Cox 14092b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1410c728a914STejun Heo if (err_mask) { 1411c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to read native " 1412c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 1413c728a914STejun Heo if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 1414c728a914STejun Heo return -EACCES; 1415c728a914STejun Heo return -EIO; 1416c728a914STejun Heo } 1417c728a914STejun Heo 1418c728a914STejun Heo if (lba48) 1419a5987e0aSTejun Heo *max_sectors = ata_tf_to_lba48(&tf) + 1; 1420c728a914STejun Heo else 1421a5987e0aSTejun Heo *max_sectors = ata_tf_to_lba(&tf) + 1; 142293328e11SAlan Cox if (dev->horkage & ATA_HORKAGE_HPA_SIZE) 142393328e11SAlan Cox (*max_sectors)--; 14241e999736SAlan Cox return 0; 14251e999736SAlan Cox } 14261e999736SAlan Cox 14271e999736SAlan Cox /** 1428c728a914STejun Heo * ata_set_max_sectors - Set max sectors 1429c728a914STejun Heo * @dev: target device 14306b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 14311e999736SAlan Cox * 1432c728a914STejun Heo * Set max sectors of @dev to @new_sectors. 1433c728a914STejun Heo * 1434c728a914STejun Heo * RETURNS: 1435c728a914STejun Heo * 0 on success, -EACCES if command is aborted or denied (due to 1436c728a914STejun Heo * previous non-volatile SET_MAX) by the drive. -EIO on other 1437c728a914STejun Heo * errors. 14381e999736SAlan Cox */ 143905027adcSTejun Heo static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 14401e999736SAlan Cox { 1441c728a914STejun Heo unsigned int err_mask; 14421e999736SAlan Cox struct ata_taskfile tf; 1443c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 14441e999736SAlan Cox 14451e999736SAlan Cox new_sectors--; 14461e999736SAlan Cox 14471e999736SAlan Cox ata_tf_init(dev, &tf); 14481e999736SAlan Cox 1449c728a914STejun Heo tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 14501e999736SAlan Cox 1451c728a914STejun Heo if (lba48) { 1452c728a914STejun Heo tf.command = ATA_CMD_SET_MAX_EXT; 1453c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 14541e999736SAlan Cox 14551e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 14561e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 14571e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 14581e582ba4STejun Heo } else { 14591e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 1460c728a914STejun Heo 14611e582ba4STejun Heo tf.device |= (new_sectors >> 24) & 0xf; 14621e582ba4STejun Heo } 14631e582ba4STejun Heo 14641e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 1465c728a914STejun Heo tf.device |= ATA_LBA; 14661e999736SAlan Cox 14671e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 14681e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 14691e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 14701e999736SAlan Cox 14712b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1472c728a914STejun Heo if (err_mask) { 1473c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to set " 1474c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 1475c728a914STejun Heo if (err_mask == AC_ERR_DEV && 1476c728a914STejun Heo (tf.feature & (ATA_ABORTED | ATA_IDNF))) 1477c728a914STejun Heo return -EACCES; 1478c728a914STejun Heo return -EIO; 1479c728a914STejun Heo } 1480c728a914STejun Heo 14811e999736SAlan Cox return 0; 14821e999736SAlan Cox } 14831e999736SAlan Cox 14841e999736SAlan Cox /** 14851e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 14861e999736SAlan Cox * @dev: Device to resize 14871e999736SAlan Cox * 14881e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 14891e999736SAlan Cox * it if required to the full size of the media. The caller must check 14901e999736SAlan Cox * the drive has the HPA feature set enabled. 149105027adcSTejun Heo * 149205027adcSTejun Heo * RETURNS: 149305027adcSTejun Heo * 0 on success, -errno on failure. 14941e999736SAlan Cox */ 149505027adcSTejun Heo static int ata_hpa_resize(struct ata_device *dev) 14961e999736SAlan Cox { 149705027adcSTejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 149805027adcSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 1499445d211bSTejun Heo bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; 150005027adcSTejun Heo u64 sectors = ata_id_n_sectors(dev->id); 150105027adcSTejun Heo u64 native_sectors; 1502c728a914STejun Heo int rc; 15031e999736SAlan Cox 150405027adcSTejun Heo /* do we need to do it? */ 150505027adcSTejun Heo if (dev->class != ATA_DEV_ATA || 150605027adcSTejun Heo !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 150705027adcSTejun Heo (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) 1508c728a914STejun Heo return 0; 15091e999736SAlan Cox 151005027adcSTejun Heo /* read native max address */ 151105027adcSTejun Heo rc = ata_read_native_max_address(dev, &native_sectors); 151205027adcSTejun Heo if (rc) { 1513dda7aba1STejun Heo /* If device aborted the command or HPA isn't going to 1514dda7aba1STejun Heo * be unlocked, skip HPA resizing. 151505027adcSTejun Heo */ 1516445d211bSTejun Heo if (rc == -EACCES || !unlock_hpa) { 151705027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "HPA support seems " 1518dda7aba1STejun Heo "broken, skipping HPA handling\n"); 151905027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 152005027adcSTejun Heo 152105027adcSTejun Heo /* we can continue if device aborted the command */ 152205027adcSTejun Heo if (rc == -EACCES) 152305027adcSTejun Heo rc = 0; 152405027adcSTejun Heo } 152505027adcSTejun Heo 152605027adcSTejun Heo return rc; 152705027adcSTejun Heo } 15285920dadfSTejun Heo dev->n_native_sectors = native_sectors; 152905027adcSTejun Heo 153005027adcSTejun Heo /* nothing to do? */ 1531445d211bSTejun Heo if (native_sectors <= sectors || !unlock_hpa) { 153205027adcSTejun Heo if (!print_info || native_sectors == sectors) 153305027adcSTejun Heo return 0; 153405027adcSTejun Heo 153505027adcSTejun Heo if (native_sectors > sectors) 15361e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 153705027adcSTejun Heo "HPA detected: current %llu, native %llu\n", 153805027adcSTejun Heo (unsigned long long)sectors, 153905027adcSTejun Heo (unsigned long long)native_sectors); 154005027adcSTejun Heo else if (native_sectors < sectors) 154105027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, 154205027adcSTejun Heo "native sectors (%llu) is smaller than " 154305027adcSTejun Heo "sectors (%llu)\n", 154405027adcSTejun Heo (unsigned long long)native_sectors, 154505027adcSTejun Heo (unsigned long long)sectors); 154605027adcSTejun Heo return 0; 15471e999736SAlan Cox } 154837301a55STejun Heo 154905027adcSTejun Heo /* let's unlock HPA */ 155005027adcSTejun Heo rc = ata_set_max_sectors(dev, native_sectors); 155105027adcSTejun Heo if (rc == -EACCES) { 155205027adcSTejun Heo /* if device aborted the command, skip HPA resizing */ 155305027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "device aborted resize " 155405027adcSTejun Heo "(%llu -> %llu), skipping HPA handling\n", 155505027adcSTejun Heo (unsigned long long)sectors, 155605027adcSTejun Heo (unsigned long long)native_sectors); 155705027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 155805027adcSTejun Heo return 0; 155905027adcSTejun Heo } else if (rc) 156005027adcSTejun Heo return rc; 156105027adcSTejun Heo 156205027adcSTejun Heo /* re-read IDENTIFY data */ 156305027adcSTejun Heo rc = ata_dev_reread_id(dev, 0); 156405027adcSTejun Heo if (rc) { 156505027adcSTejun Heo ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " 156605027adcSTejun Heo "data after HPA resizing\n"); 156705027adcSTejun Heo return rc; 156805027adcSTejun Heo } 156905027adcSTejun Heo 157005027adcSTejun Heo if (print_info) { 157105027adcSTejun Heo u64 new_sectors = ata_id_n_sectors(dev->id); 157205027adcSTejun Heo ata_dev_printk(dev, KERN_INFO, 157305027adcSTejun Heo "HPA unlocked: %llu -> %llu, native %llu\n", 157405027adcSTejun Heo (unsigned long long)sectors, 157505027adcSTejun Heo (unsigned long long)new_sectors, 157605027adcSTejun Heo (unsigned long long)native_sectors); 157705027adcSTejun Heo } 157805027adcSTejun Heo 157905027adcSTejun Heo return 0; 15801e999736SAlan Cox } 15811e999736SAlan Cox 1582c6fd2807SJeff Garzik /** 1583c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1584c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1585c6fd2807SJeff Garzik * 1586c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1587c6fd2807SJeff Garzik * page. 1588c6fd2807SJeff Garzik * 1589c6fd2807SJeff Garzik * LOCKING: 1590c6fd2807SJeff Garzik * caller. 1591c6fd2807SJeff Garzik */ 1592c6fd2807SJeff Garzik 1593c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1594c6fd2807SJeff Garzik { 1595c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1596c6fd2807SJeff Garzik "53==0x%04x " 1597c6fd2807SJeff Garzik "63==0x%04x " 1598c6fd2807SJeff Garzik "64==0x%04x " 1599c6fd2807SJeff Garzik "75==0x%04x \n", 1600c6fd2807SJeff Garzik id[49], 1601c6fd2807SJeff Garzik id[53], 1602c6fd2807SJeff Garzik id[63], 1603c6fd2807SJeff Garzik id[64], 1604c6fd2807SJeff Garzik id[75]); 1605c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1606c6fd2807SJeff Garzik "81==0x%04x " 1607c6fd2807SJeff Garzik "82==0x%04x " 1608c6fd2807SJeff Garzik "83==0x%04x " 1609c6fd2807SJeff Garzik "84==0x%04x \n", 1610c6fd2807SJeff Garzik id[80], 1611c6fd2807SJeff Garzik id[81], 1612c6fd2807SJeff Garzik id[82], 1613c6fd2807SJeff Garzik id[83], 1614c6fd2807SJeff Garzik id[84]); 1615c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1616c6fd2807SJeff Garzik "93==0x%04x\n", 1617c6fd2807SJeff Garzik id[88], 1618c6fd2807SJeff Garzik id[93]); 1619c6fd2807SJeff Garzik } 1620c6fd2807SJeff Garzik 1621c6fd2807SJeff Garzik /** 1622c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1623c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1624c6fd2807SJeff Garzik * 1625c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1626c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1627c6fd2807SJeff Garzik * 1628c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1629c6fd2807SJeff Garzik * 1630c6fd2807SJeff Garzik * LOCKING: 1631c6fd2807SJeff Garzik * None. 1632c6fd2807SJeff Garzik * 1633c6fd2807SJeff Garzik * RETURNS: 1634c6fd2807SJeff Garzik * Computed xfermask 1635c6fd2807SJeff Garzik */ 16367dc951aeSTejun Heo unsigned long ata_id_xfermask(const u16 *id) 1637c6fd2807SJeff Garzik { 16387dc951aeSTejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 1639c6fd2807SJeff Garzik 1640c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1641c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1642c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1643c6fd2807SJeff Garzik pio_mask <<= 3; 1644c6fd2807SJeff Garzik pio_mask |= 0x7; 1645c6fd2807SJeff Garzik } else { 1646c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1647c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1648c6fd2807SJeff Garzik * a mask. 1649c6fd2807SJeff Garzik */ 16507a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 165146767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 165246767aebSAlan Cox pio_mask = (2 << mode) - 1; 165346767aebSAlan Cox else 165446767aebSAlan Cox pio_mask = 1; 1655c6fd2807SJeff Garzik 1656c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1657c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1658c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1659c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1660c6fd2807SJeff Garzik * will get this right anyway 1661c6fd2807SJeff Garzik */ 1662c6fd2807SJeff Garzik } 1663c6fd2807SJeff Garzik 1664c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1665c6fd2807SJeff Garzik 1666b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1667b352e57dSAlan Cox /* 1668b352e57dSAlan Cox * Process compact flash extended modes 1669b352e57dSAlan Cox */ 167062afe5d7SSergei Shtylyov int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; 167162afe5d7SSergei Shtylyov int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; 1672b352e57dSAlan Cox 1673b352e57dSAlan Cox if (pio) 1674b352e57dSAlan Cox pio_mask |= (1 << 5); 1675b352e57dSAlan Cox if (pio > 1) 1676b352e57dSAlan Cox pio_mask |= (1 << 6); 1677b352e57dSAlan Cox if (dma) 1678b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1679b352e57dSAlan Cox if (dma > 1) 1680b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1681b352e57dSAlan Cox } 1682b352e57dSAlan Cox 1683c6fd2807SJeff Garzik udma_mask = 0; 1684c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1685c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1686c6fd2807SJeff Garzik 1687c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1688c6fd2807SJeff Garzik } 1689c6fd2807SJeff Garzik 16907102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1691c6fd2807SJeff Garzik { 1692c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1693c6fd2807SJeff Garzik 1694c6fd2807SJeff Garzik complete(waiting); 1695c6fd2807SJeff Garzik } 1696c6fd2807SJeff Garzik 1697c6fd2807SJeff Garzik /** 16982432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1699c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1700c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1701c6fd2807SJeff Garzik * @cdb: CDB for packet command 1702c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 17035c1ad8b3SRandy Dunlap * @sgl: sg list for the data buffer of the command 17042432697bSTejun Heo * @n_elem: Number of sg entries 17052b789108STejun Heo * @timeout: Timeout in msecs (0 for default) 1706c6fd2807SJeff Garzik * 1707c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1708c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1709c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1710c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1711c6fd2807SJeff Garzik * clean up after timeout. 1712c6fd2807SJeff Garzik * 1713c6fd2807SJeff Garzik * LOCKING: 1714c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1715c6fd2807SJeff Garzik * 1716c6fd2807SJeff Garzik * RETURNS: 1717c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1718c6fd2807SJeff Garzik */ 17192432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1720c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 172187260216SJens Axboe int dma_dir, struct scatterlist *sgl, 17222b789108STejun Heo unsigned int n_elem, unsigned long timeout) 1723c6fd2807SJeff Garzik { 17249af5c9c9STejun Heo struct ata_link *link = dev->link; 17259af5c9c9STejun Heo struct ata_port *ap = link->ap; 1726c6fd2807SJeff Garzik u8 command = tf->command; 172787fbc5a0STejun Heo int auto_timeout = 0; 1728c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1729c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1730c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1731da917d69STejun Heo int preempted_nr_active_links; 1732c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1733c6fd2807SJeff Garzik unsigned long flags; 1734c6fd2807SJeff Garzik unsigned int err_mask; 1735c6fd2807SJeff Garzik int rc; 1736c6fd2807SJeff Garzik 1737c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1738c6fd2807SJeff Garzik 1739c6fd2807SJeff Garzik /* no internal command while frozen */ 1740c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1741c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1742c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1743c6fd2807SJeff Garzik } 1744c6fd2807SJeff Garzik 1745c6fd2807SJeff Garzik /* initialize internal qc */ 1746c6fd2807SJeff Garzik 1747c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1748c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1749c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1750c6fd2807SJeff Garzik * EH stuff without converting to it. 1751c6fd2807SJeff Garzik */ 1752c6fd2807SJeff Garzik if (ap->ops->error_handler) 1753c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1754c6fd2807SJeff Garzik else 1755c6fd2807SJeff Garzik tag = 0; 1756c6fd2807SJeff Garzik 17578a8bc223STejun Heo if (test_and_set_bit(tag, &ap->qc_allocated)) 17588a8bc223STejun Heo BUG(); 1759c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1760c6fd2807SJeff Garzik 1761c6fd2807SJeff Garzik qc->tag = tag; 1762c6fd2807SJeff Garzik qc->scsicmd = NULL; 1763c6fd2807SJeff Garzik qc->ap = ap; 1764c6fd2807SJeff Garzik qc->dev = dev; 1765c6fd2807SJeff Garzik ata_qc_reinit(qc); 1766c6fd2807SJeff Garzik 17679af5c9c9STejun Heo preempted_tag = link->active_tag; 17689af5c9c9STejun Heo preempted_sactive = link->sactive; 1769c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1770da917d69STejun Heo preempted_nr_active_links = ap->nr_active_links; 17719af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 17729af5c9c9STejun Heo link->sactive = 0; 1773c6fd2807SJeff Garzik ap->qc_active = 0; 1774da917d69STejun Heo ap->nr_active_links = 0; 1775c6fd2807SJeff Garzik 1776c6fd2807SJeff Garzik /* prepare & issue qc */ 1777c6fd2807SJeff Garzik qc->tf = *tf; 1778c6fd2807SJeff Garzik if (cdb) 1779c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1780c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1781c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1782c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 17832432697bSTejun Heo unsigned int i, buflen = 0; 178487260216SJens Axboe struct scatterlist *sg; 17852432697bSTejun Heo 178687260216SJens Axboe for_each_sg(sgl, sg, n_elem, i) 178787260216SJens Axboe buflen += sg->length; 17882432697bSTejun Heo 178987260216SJens Axboe ata_sg_init(qc, sgl, n_elem); 179049c80429SBrian King qc->nbytes = buflen; 1791c6fd2807SJeff Garzik } 1792c6fd2807SJeff Garzik 1793c6fd2807SJeff Garzik qc->private_data = &wait; 1794c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1795c6fd2807SJeff Garzik 1796c6fd2807SJeff Garzik ata_qc_issue(qc); 1797c6fd2807SJeff Garzik 1798c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1799c6fd2807SJeff Garzik 180087fbc5a0STejun Heo if (!timeout) { 180187fbc5a0STejun Heo if (ata_probe_timeout) 1802341c2c95STejun Heo timeout = ata_probe_timeout * 1000; 180387fbc5a0STejun Heo else { 180487fbc5a0STejun Heo timeout = ata_internal_cmd_timeout(dev, command); 180587fbc5a0STejun Heo auto_timeout = 1; 180687fbc5a0STejun Heo } 180787fbc5a0STejun Heo } 18082b789108STejun Heo 18092b789108STejun Heo rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1810c6fd2807SJeff Garzik 1811c429137aSTejun Heo ata_sff_flush_pio_task(ap); 1812c6fd2807SJeff Garzik 1813c6fd2807SJeff Garzik if (!rc) { 1814c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1815c6fd2807SJeff Garzik 1816c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1817c6fd2807SJeff Garzik * following test prevents us from completing the qc 1818c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1819c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1820c6fd2807SJeff Garzik */ 1821c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1822c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1823c6fd2807SJeff Garzik 1824c6fd2807SJeff Garzik if (ap->ops->error_handler) 1825c6fd2807SJeff Garzik ata_port_freeze(ap); 1826c6fd2807SJeff Garzik else 1827c6fd2807SJeff Garzik ata_qc_complete(qc); 1828c6fd2807SJeff Garzik 1829c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1830c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1831c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1832c6fd2807SJeff Garzik } 1833c6fd2807SJeff Garzik 1834c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1835c6fd2807SJeff Garzik } 1836c6fd2807SJeff Garzik 1837c6fd2807SJeff Garzik /* do post_internal_cmd */ 1838c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1839c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1840c6fd2807SJeff Garzik 1841a51d644aSTejun Heo /* perform minimal error analysis */ 1842a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1843a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1844a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1845a51d644aSTejun Heo 1846a51d644aSTejun Heo if (!qc->err_mask) 1847c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1848a51d644aSTejun Heo 1849a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1850a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1851c6fd2807SJeff Garzik } 1852c6fd2807SJeff Garzik 1853c6fd2807SJeff Garzik /* finish up */ 1854c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1855c6fd2807SJeff Garzik 1856c6fd2807SJeff Garzik *tf = qc->result_tf; 1857c6fd2807SJeff Garzik err_mask = qc->err_mask; 1858c6fd2807SJeff Garzik 1859c6fd2807SJeff Garzik ata_qc_free(qc); 18609af5c9c9STejun Heo link->active_tag = preempted_tag; 18619af5c9c9STejun Heo link->sactive = preempted_sactive; 1862c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1863da917d69STejun Heo ap->nr_active_links = preempted_nr_active_links; 1864c6fd2807SJeff Garzik 1865c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1866c6fd2807SJeff Garzik 186787fbc5a0STejun Heo if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) 186887fbc5a0STejun Heo ata_internal_cmd_timed_out(dev, command); 186987fbc5a0STejun Heo 1870c6fd2807SJeff Garzik return err_mask; 1871c6fd2807SJeff Garzik } 1872c6fd2807SJeff Garzik 1873c6fd2807SJeff Garzik /** 187433480a0eSTejun Heo * ata_exec_internal - execute libata internal command 18752432697bSTejun Heo * @dev: Device to which the command is sent 18762432697bSTejun Heo * @tf: Taskfile registers for the command and the result 18772432697bSTejun Heo * @cdb: CDB for packet command 18782432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 18792432697bSTejun Heo * @buf: Data buffer of the command 18802432697bSTejun Heo * @buflen: Length of data buffer 18812b789108STejun Heo * @timeout: Timeout in msecs (0 for default) 18822432697bSTejun Heo * 18832432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 18842432697bSTejun Heo * buffer instead of sg list. 18852432697bSTejun Heo * 18862432697bSTejun Heo * LOCKING: 18872432697bSTejun Heo * None. Should be called with kernel context, might sleep. 18882432697bSTejun Heo * 18892432697bSTejun Heo * RETURNS: 18902432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 18912432697bSTejun Heo */ 18922432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 18932432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 18942b789108STejun Heo int dma_dir, void *buf, unsigned int buflen, 18952b789108STejun Heo unsigned long timeout) 18962432697bSTejun Heo { 189733480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 189833480a0eSTejun Heo unsigned int n_elem = 0; 18992432697bSTejun Heo 190033480a0eSTejun Heo if (dma_dir != DMA_NONE) { 190133480a0eSTejun Heo WARN_ON(!buf); 19022432697bSTejun Heo sg_init_one(&sg, buf, buflen); 190333480a0eSTejun Heo psg = &sg; 190433480a0eSTejun Heo n_elem++; 190533480a0eSTejun Heo } 19062432697bSTejun Heo 19072b789108STejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, 19082b789108STejun Heo timeout); 19092432697bSTejun Heo } 19102432697bSTejun Heo 19112432697bSTejun Heo /** 1912c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1913c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1914c6fd2807SJeff Garzik * @cmd: Opcode to execute 1915c6fd2807SJeff Garzik * 1916c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1917c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1918c6fd2807SJeff Garzik * 1919c6fd2807SJeff Garzik * LOCKING: 1920c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1921c6fd2807SJeff Garzik * 1922c6fd2807SJeff Garzik * RETURNS: 1923c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1924c6fd2807SJeff Garzik */ 1925c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1926c6fd2807SJeff Garzik { 1927c6fd2807SJeff Garzik struct ata_taskfile tf; 1928c6fd2807SJeff Garzik 1929c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1930c6fd2807SJeff Garzik 1931c6fd2807SJeff Garzik tf.command = cmd; 1932c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1933c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1934c6fd2807SJeff Garzik 19352b789108STejun Heo return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1936c6fd2807SJeff Garzik } 1937c6fd2807SJeff Garzik 1938c6fd2807SJeff Garzik /** 1939c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1940c6fd2807SJeff Garzik * @adev: ATA device 1941c6fd2807SJeff Garzik * 1942c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1943c6fd2807SJeff Garzik * by various controllers for chip configuration. 1944c6fd2807SJeff Garzik */ 1945c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1946c6fd2807SJeff Garzik { 19470d9e6659STejun Heo /* Don't set IORDY if we're preparing for reset. IORDY may 19480d9e6659STejun Heo * lead to controller lock up on certain controllers if the 19490d9e6659STejun Heo * port is not occupied. See bko#11703 for details. 19500d9e6659STejun Heo */ 19510d9e6659STejun Heo if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) 19520d9e6659STejun Heo return 0; 19530d9e6659STejun Heo /* Controller doesn't support IORDY. Probably a pointless 19540d9e6659STejun Heo * check as the caller should know this. 19550d9e6659STejun Heo */ 19569af5c9c9STejun Heo if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1957c6fd2807SJeff Garzik return 0; 19585c18c4d2SDavid Daney /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ 19595c18c4d2SDavid Daney if (ata_id_is_cfa(adev->id) 19605c18c4d2SDavid Daney && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) 19615c18c4d2SDavid Daney return 0; 1962432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1963432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1964c6fd2807SJeff Garzik return 1; 1965432729f0SAlan Cox /* We turn it on when possible */ 1966432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1967432729f0SAlan Cox return 1; 1968432729f0SAlan Cox return 0; 1969432729f0SAlan Cox } 1970c6fd2807SJeff Garzik 1971432729f0SAlan Cox /** 1972432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 1973432729f0SAlan Cox * @adev: ATA device 1974432729f0SAlan Cox * 1975432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 1976432729f0SAlan Cox * -1 if no iordy mode is available. 1977432729f0SAlan Cox */ 1978432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1979432729f0SAlan Cox { 1980c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1981c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1982432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1983c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1984c6fd2807SJeff Garzik if (pio) { 1985c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1986c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1987432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1988432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 1989c6fd2807SJeff Garzik } 1990c6fd2807SJeff Garzik } 1991432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1992c6fd2807SJeff Garzik } 1993c6fd2807SJeff Garzik 1994c6fd2807SJeff Garzik /** 1995963e4975SAlan Cox * ata_do_dev_read_id - default ID read method 1996963e4975SAlan Cox * @dev: device 1997963e4975SAlan Cox * @tf: proposed taskfile 1998963e4975SAlan Cox * @id: data buffer 1999963e4975SAlan Cox * 2000963e4975SAlan Cox * Issue the identify taskfile and hand back the buffer containing 2001963e4975SAlan Cox * identify data. For some RAID controllers and for pre ATA devices 2002963e4975SAlan Cox * this function is wrapped or replaced by the driver 2003963e4975SAlan Cox */ 2004963e4975SAlan Cox unsigned int ata_do_dev_read_id(struct ata_device *dev, 2005963e4975SAlan Cox struct ata_taskfile *tf, u16 *id) 2006963e4975SAlan Cox { 2007963e4975SAlan Cox return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, 2008963e4975SAlan Cox id, sizeof(id[0]) * ATA_ID_WORDS, 0); 2009963e4975SAlan Cox } 2010963e4975SAlan Cox 2011963e4975SAlan Cox /** 2012c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 2013c6fd2807SJeff Garzik * @dev: target device 2014c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 2015bff04647STejun Heo * @flags: ATA_READID_* flags 2016c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 2017c6fd2807SJeff Garzik * 2018c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 2019c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 2020c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 2021c6fd2807SJeff Garzik * for pre-ATA4 drives. 2022c6fd2807SJeff Garzik * 202350a99018SAlan Cox * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 202450a99018SAlan Cox * now we abort if we hit that case. 202550a99018SAlan Cox * 2026c6fd2807SJeff Garzik * LOCKING: 2027c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2028c6fd2807SJeff Garzik * 2029c6fd2807SJeff Garzik * RETURNS: 2030c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2031c6fd2807SJeff Garzik */ 2032c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 2033bff04647STejun Heo unsigned int flags, u16 *id) 2034c6fd2807SJeff Garzik { 20359af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 2036c6fd2807SJeff Garzik unsigned int class = *p_class; 2037c6fd2807SJeff Garzik struct ata_taskfile tf; 2038c6fd2807SJeff Garzik unsigned int err_mask = 0; 2039c6fd2807SJeff Garzik const char *reason; 204079b42babSTejun Heo bool is_semb = class == ATA_DEV_SEMB; 204154936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 2042c6fd2807SJeff Garzik int rc; 2043c6fd2807SJeff Garzik 2044c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 20457f5e4e8dSHarvey Harrison ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); 2046c6fd2807SJeff Garzik 2047c6fd2807SJeff Garzik retry: 2048c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 2049c6fd2807SJeff Garzik 2050c6fd2807SJeff Garzik switch (class) { 205179b42babSTejun Heo case ATA_DEV_SEMB: 205279b42babSTejun Heo class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ 2053c6fd2807SJeff Garzik case ATA_DEV_ATA: 2054c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 2055c6fd2807SJeff Garzik break; 2056c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 2057c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 2058c6fd2807SJeff Garzik break; 2059c6fd2807SJeff Garzik default: 2060c6fd2807SJeff Garzik rc = -ENODEV; 2061c6fd2807SJeff Garzik reason = "unsupported class"; 2062c6fd2807SJeff Garzik goto err_out; 2063c6fd2807SJeff Garzik } 2064c6fd2807SJeff Garzik 2065c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 206681afe893STejun Heo 206781afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 206881afe893STejun Heo * sure those are properly initialized. 206981afe893STejun Heo */ 207081afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 207181afe893STejun Heo 207281afe893STejun Heo /* Device presence detection is unreliable on some 207381afe893STejun Heo * controllers. Always poll IDENTIFY if available. 207481afe893STejun Heo */ 207581afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 2076c6fd2807SJeff Garzik 2077963e4975SAlan Cox if (ap->ops->read_id) 2078963e4975SAlan Cox err_mask = ap->ops->read_id(dev, &tf, id); 2079963e4975SAlan Cox else 2080963e4975SAlan Cox err_mask = ata_do_dev_read_id(dev, &tf, id); 2081963e4975SAlan Cox 2082c6fd2807SJeff Garzik if (err_mask) { 2083800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 20841ffc151fSTejun Heo ata_dev_printk(dev, KERN_DEBUG, 20851ffc151fSTejun Heo "NODEV after polling detection\n"); 208655a8e2c8STejun Heo return -ENOENT; 208755a8e2c8STejun Heo } 208855a8e2c8STejun Heo 208979b42babSTejun Heo if (is_semb) { 209079b42babSTejun Heo ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on " 209179b42babSTejun Heo "device w/ SEMB sig, disabled\n"); 209279b42babSTejun Heo /* SEMB is not supported yet */ 209379b42babSTejun Heo *p_class = ATA_DEV_SEMB_UNSUP; 209479b42babSTejun Heo return 0; 209579b42babSTejun Heo } 209679b42babSTejun Heo 20971ffc151fSTejun Heo if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 20981ffc151fSTejun Heo /* Device or controller might have reported 20991ffc151fSTejun Heo * the wrong device class. Give a shot at the 21001ffc151fSTejun Heo * other IDENTIFY if the current one is 21011ffc151fSTejun Heo * aborted by the device. 210254936f8bSTejun Heo */ 21031ffc151fSTejun Heo if (may_fallback) { 210454936f8bSTejun Heo may_fallback = 0; 210554936f8bSTejun Heo 210654936f8bSTejun Heo if (class == ATA_DEV_ATA) 210754936f8bSTejun Heo class = ATA_DEV_ATAPI; 210854936f8bSTejun Heo else 210954936f8bSTejun Heo class = ATA_DEV_ATA; 211054936f8bSTejun Heo goto retry; 211154936f8bSTejun Heo } 211254936f8bSTejun Heo 21131ffc151fSTejun Heo /* Control reaches here iff the device aborted 21141ffc151fSTejun Heo * both flavors of IDENTIFYs which happens 21151ffc151fSTejun Heo * sometimes with phantom devices. 21161ffc151fSTejun Heo */ 21171ffc151fSTejun Heo ata_dev_printk(dev, KERN_DEBUG, 21181ffc151fSTejun Heo "both IDENTIFYs aborted, assuming NODEV\n"); 21191ffc151fSTejun Heo return -ENOENT; 21201ffc151fSTejun Heo } 21211ffc151fSTejun Heo 2122c6fd2807SJeff Garzik rc = -EIO; 2123c6fd2807SJeff Garzik reason = "I/O error"; 2124c6fd2807SJeff Garzik goto err_out; 2125c6fd2807SJeff Garzik } 2126c6fd2807SJeff Garzik 212743c9c591STejun Heo if (dev->horkage & ATA_HORKAGE_DUMP_ID) { 212843c9c591STejun Heo ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, " 212943c9c591STejun Heo "class=%d may_fallback=%d tried_spinup=%d\n", 213043c9c591STejun Heo class, may_fallback, tried_spinup); 213143c9c591STejun Heo print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 213243c9c591STejun Heo 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); 213343c9c591STejun Heo } 213443c9c591STejun Heo 213554936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 213654936f8bSTejun Heo * successfully at least once. 213754936f8bSTejun Heo */ 213854936f8bSTejun Heo may_fallback = 0; 213954936f8bSTejun Heo 2140c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 2141c6fd2807SJeff Garzik 2142c6fd2807SJeff Garzik /* sanity check */ 2143c6fd2807SJeff Garzik rc = -EINVAL; 21446070068bSAlan Cox reason = "device reports invalid type"; 21454a3381feSJeff Garzik 21464a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 21474a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 21484a3381feSJeff Garzik goto err_out; 21494a3381feSJeff Garzik } else { 21504a3381feSJeff Garzik if (ata_id_is_ata(id)) 2151c6fd2807SJeff Garzik goto err_out; 2152c6fd2807SJeff Garzik } 2153c6fd2807SJeff Garzik 2154169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 2155169439c2SMark Lord tried_spinup = 1; 2156169439c2SMark Lord /* 2157169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 2158169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 2159169439c2SMark Lord * anything other than the original IDENTIFY command. 2160169439c2SMark Lord */ 2161218f3d30SJeff Garzik err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 2162fb0582f9SRyan Power if (err_mask && id[2] != 0x738c) { 2163169439c2SMark Lord rc = -EIO; 2164169439c2SMark Lord reason = "SPINUP failed"; 2165169439c2SMark Lord goto err_out; 2166169439c2SMark Lord } 2167169439c2SMark Lord /* 2168169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 2169169439c2SMark Lord * we now must reissue the IDENTIFY command. 2170169439c2SMark Lord */ 2171169439c2SMark Lord if (id[2] == 0x37c8) 2172169439c2SMark Lord goto retry; 2173169439c2SMark Lord } 2174169439c2SMark Lord 2175bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 2176c6fd2807SJeff Garzik /* 2177c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 2178c6fd2807SJeff Garzik * SRST RESET 217950a99018SAlan Cox * IDENTIFY (optional in early ATA) 218050a99018SAlan Cox * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 2181c6fd2807SJeff Garzik * anything else.. 2182c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 218350a99018SAlan Cox * 218450a99018SAlan Cox * Note that ATA4 says lba is mandatory so the second check 2185c9404c9cSAdam Buchbinder * should never trigger. 2186c6fd2807SJeff Garzik */ 2187c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 2188c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 2189c6fd2807SJeff Garzik if (err_mask) { 2190c6fd2807SJeff Garzik rc = -EIO; 2191c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 2192c6fd2807SJeff Garzik goto err_out; 2193c6fd2807SJeff Garzik } 2194c6fd2807SJeff Garzik 2195c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 2196c6fd2807SJeff Garzik * changed. reread the identify device info. 2197c6fd2807SJeff Garzik */ 2198bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 2199c6fd2807SJeff Garzik goto retry; 2200c6fd2807SJeff Garzik } 2201c6fd2807SJeff Garzik } 2202c6fd2807SJeff Garzik 2203c6fd2807SJeff Garzik *p_class = class; 2204c6fd2807SJeff Garzik 2205c6fd2807SJeff Garzik return 0; 2206c6fd2807SJeff Garzik 2207c6fd2807SJeff Garzik err_out: 2208c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2209c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 2210c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 2211c6fd2807SJeff Garzik return rc; 2212c6fd2807SJeff Garzik } 2213c6fd2807SJeff Garzik 22149062712fSTejun Heo static int ata_do_link_spd_horkage(struct ata_device *dev) 22159062712fSTejun Heo { 22169062712fSTejun Heo struct ata_link *plink = ata_dev_phys_link(dev); 22179062712fSTejun Heo u32 target, target_limit; 22189062712fSTejun Heo 22199062712fSTejun Heo if (!sata_scr_valid(plink)) 22209062712fSTejun Heo return 0; 22219062712fSTejun Heo 22229062712fSTejun Heo if (dev->horkage & ATA_HORKAGE_1_5_GBPS) 22239062712fSTejun Heo target = 1; 22249062712fSTejun Heo else 22259062712fSTejun Heo return 0; 22269062712fSTejun Heo 22279062712fSTejun Heo target_limit = (1 << target) - 1; 22289062712fSTejun Heo 22299062712fSTejun Heo /* if already on stricter limit, no need to push further */ 22309062712fSTejun Heo if (plink->sata_spd_limit <= target_limit) 22319062712fSTejun Heo return 0; 22329062712fSTejun Heo 22339062712fSTejun Heo plink->sata_spd_limit = target_limit; 22349062712fSTejun Heo 22359062712fSTejun Heo /* Request another EH round by returning -EAGAIN if link is 22369062712fSTejun Heo * going faster than the target speed. Forward progress is 22379062712fSTejun Heo * guaranteed by setting sata_spd_limit to target_limit above. 22389062712fSTejun Heo */ 22399062712fSTejun Heo if (plink->sata_spd > target) { 22409062712fSTejun Heo ata_dev_printk(dev, KERN_INFO, 22419062712fSTejun Heo "applying link speed limit horkage to %s\n", 22429062712fSTejun Heo sata_spd_string(target)); 22439062712fSTejun Heo return -EAGAIN; 22449062712fSTejun Heo } 22459062712fSTejun Heo return 0; 22469062712fSTejun Heo } 22479062712fSTejun Heo 2248c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 2249c6fd2807SJeff Garzik { 22509af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 22519ce8e307SJens Axboe 22529ce8e307SJens Axboe if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) 22539ce8e307SJens Axboe return 0; 22549ce8e307SJens Axboe 22559af5c9c9STejun Heo return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2256c6fd2807SJeff Garzik } 2257c6fd2807SJeff Garzik 2258388539f3SShaohua Li static int ata_dev_config_ncq(struct ata_device *dev, 2259c6fd2807SJeff Garzik char *desc, size_t desc_sz) 2260c6fd2807SJeff Garzik { 22619af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 2262c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2263388539f3SShaohua Li unsigned int err_mask; 2264388539f3SShaohua Li char *aa_desc = ""; 2265c6fd2807SJeff Garzik 2266c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 2267c6fd2807SJeff Garzik desc[0] = '\0'; 2268388539f3SShaohua Li return 0; 2269c6fd2807SJeff Garzik } 227075683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_NONCQ) { 22716919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 2272388539f3SShaohua Li return 0; 22736919a0a6SAlan Cox } 2274c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 2275cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 2276c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 2277c6fd2807SJeff Garzik } 2278c6fd2807SJeff Garzik 2279388539f3SShaohua Li if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && 2280388539f3SShaohua Li (ap->flags & ATA_FLAG_FPDMA_AA) && 2281388539f3SShaohua Li ata_id_has_fpdma_aa(dev->id)) { 2282388539f3SShaohua Li err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, 2283388539f3SShaohua Li SATA_FPDMA_AA); 2284388539f3SShaohua Li if (err_mask) { 2285388539f3SShaohua Li ata_dev_printk(dev, KERN_ERR, "failed to enable AA" 2286388539f3SShaohua Li "(error_mask=0x%x)\n", err_mask); 2287388539f3SShaohua Li if (err_mask != AC_ERR_DEV) { 2288388539f3SShaohua Li dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; 2289388539f3SShaohua Li return -EIO; 2290388539f3SShaohua Li } 2291388539f3SShaohua Li } else 2292388539f3SShaohua Li aa_desc = ", AA"; 2293388539f3SShaohua Li } 2294388539f3SShaohua Li 2295c6fd2807SJeff Garzik if (hdepth >= ddepth) 2296388539f3SShaohua Li snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); 2297c6fd2807SJeff Garzik else 2298388539f3SShaohua Li snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, 2299388539f3SShaohua Li ddepth, aa_desc); 2300388539f3SShaohua Li return 0; 2301c6fd2807SJeff Garzik } 2302c6fd2807SJeff Garzik 2303c6fd2807SJeff Garzik /** 2304c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 2305c6fd2807SJeff Garzik * @dev: Target device to configure 2306c6fd2807SJeff Garzik * 2307c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 2308c6fd2807SJeff Garzik * driver specific fixups are also applied. 2309c6fd2807SJeff Garzik * 2310c6fd2807SJeff Garzik * LOCKING: 2311c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2312c6fd2807SJeff Garzik * 2313c6fd2807SJeff Garzik * RETURNS: 2314c6fd2807SJeff Garzik * 0 on success, -errno otherwise 2315c6fd2807SJeff Garzik */ 2316efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 2317c6fd2807SJeff Garzik { 23189af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 23199af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 23206746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 2321c6fd2807SJeff Garzik const u16 *id = dev->id; 23227dc951aeSTejun Heo unsigned long xfer_mask; 2323b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 23243f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 23253f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 2326c6fd2807SJeff Garzik int rc; 2327c6fd2807SJeff Garzik 2328c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 232944877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 23307f5e4e8dSHarvey Harrison __func__); 2331c6fd2807SJeff Garzik return 0; 2332c6fd2807SJeff Garzik } 2333c6fd2807SJeff Garzik 2334c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 23357f5e4e8dSHarvey Harrison ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); 2336c6fd2807SJeff Garzik 233775683fe7STejun Heo /* set horkage */ 233875683fe7STejun Heo dev->horkage |= ata_dev_blacklisted(dev); 233933267325STejun Heo ata_force_horkage(dev); 234075683fe7STejun Heo 234150af2fa1STejun Heo if (dev->horkage & ATA_HORKAGE_DISABLE) { 234250af2fa1STejun Heo ata_dev_printk(dev, KERN_INFO, 234350af2fa1STejun Heo "unsupported device, disabling\n"); 234450af2fa1STejun Heo ata_dev_disable(dev); 234550af2fa1STejun Heo return 0; 234650af2fa1STejun Heo } 234750af2fa1STejun Heo 23482486fa56STejun Heo if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 23492486fa56STejun Heo dev->class == ATA_DEV_ATAPI) { 23502486fa56STejun Heo ata_dev_printk(dev, KERN_WARNING, 23512486fa56STejun Heo "WARNING: ATAPI is %s, device ignored.\n", 23522486fa56STejun Heo atapi_enabled ? "not supported with this driver" 23532486fa56STejun Heo : "disabled"); 23542486fa56STejun Heo ata_dev_disable(dev); 23552486fa56STejun Heo return 0; 23562486fa56STejun Heo } 23572486fa56STejun Heo 23589062712fSTejun Heo rc = ata_do_link_spd_horkage(dev); 23599062712fSTejun Heo if (rc) 23609062712fSTejun Heo return rc; 23619062712fSTejun Heo 23626746544cSTejun Heo /* let ACPI work its magic */ 23636746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 23646746544cSTejun Heo if (rc) 23656746544cSTejun Heo return rc; 236608573a86SKristen Carlson Accardi 236705027adcSTejun Heo /* massage HPA, do it early as it might change IDENTIFY data */ 236805027adcSTejun Heo rc = ata_hpa_resize(dev); 236905027adcSTejun Heo if (rc) 237005027adcSTejun Heo return rc; 237105027adcSTejun Heo 2372c6fd2807SJeff Garzik /* print device capabilities */ 2373c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2374c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2375c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 2376c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 23777f5e4e8dSHarvey Harrison __func__, 2378c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 2379c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 2380c6fd2807SJeff Garzik 2381c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 2382c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 2383c6fd2807SJeff Garzik dev->max_sectors = 0; 2384c6fd2807SJeff Garzik dev->cdb_len = 0; 2385c6fd2807SJeff Garzik dev->n_sectors = 0; 2386c6fd2807SJeff Garzik dev->cylinders = 0; 2387c6fd2807SJeff Garzik dev->heads = 0; 2388c6fd2807SJeff Garzik dev->sectors = 0; 2389e18086d6SMark Lord dev->multi_count = 0; 2390c6fd2807SJeff Garzik 2391c6fd2807SJeff Garzik /* 2392c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 2393c6fd2807SJeff Garzik */ 2394c6fd2807SJeff Garzik 2395c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 2396c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 2397c6fd2807SJeff Garzik 2398c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2399c6fd2807SJeff Garzik ata_dump_id(id); 2400c6fd2807SJeff Garzik 2401ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 2402ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 2403ef143d57SAlbert Lee sizeof(fwrevbuf)); 2404ef143d57SAlbert Lee 2405ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 2406ef143d57SAlbert Lee sizeof(modelbuf)); 2407ef143d57SAlbert Lee 2408c6fd2807SJeff Garzik /* ATA-specific feature tests */ 2409c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 2410b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 241162afe5d7SSergei Shtylyov /* CPRM may make this media unusable */ 241262afe5d7SSergei Shtylyov if (id[ATA_ID_CFA_KEY_MGMT] & 1) 241344877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 241444877b4eSTejun Heo "supports DRM functions and may " 241544877b4eSTejun Heo "not be fully accessable.\n"); 2416b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 2417ae8d4ee7SAlan Cox } else { 2418b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 2419ae8d4ee7SAlan Cox /* Warn the user if the device has TPM extensions */ 2420ae8d4ee7SAlan Cox if (ata_id_has_tpm(id)) 2421ae8d4ee7SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2422ae8d4ee7SAlan Cox "supports DRM functions and may " 2423ae8d4ee7SAlan Cox "not be fully accessable.\n"); 2424ae8d4ee7SAlan Cox } 2425b352e57dSAlan Cox 2426c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 2427c6fd2807SJeff Garzik 2428e18086d6SMark Lord /* get current R/W Multiple count setting */ 2429e18086d6SMark Lord if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { 2430e18086d6SMark Lord unsigned int max = dev->id[47] & 0xff; 2431e18086d6SMark Lord unsigned int cnt = dev->id[59] & 0xff; 2432e18086d6SMark Lord /* only recognize/allow powers of two here */ 2433e18086d6SMark Lord if (is_power_of_2(max) && is_power_of_2(cnt)) 2434e18086d6SMark Lord if (cnt <= max) 2435e18086d6SMark Lord dev->multi_count = cnt; 2436e18086d6SMark Lord } 24373f64f565SEric D. Mudama 2438c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 2439c6fd2807SJeff Garzik const char *lba_desc; 2440388539f3SShaohua Li char ncq_desc[24]; 2441c6fd2807SJeff Garzik 2442c6fd2807SJeff Garzik lba_desc = "LBA"; 2443c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 2444c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 2445c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 2446c6fd2807SJeff Garzik lba_desc = "LBA48"; 24476fc49adbSTejun Heo 24486fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 24496fc49adbSTejun Heo ata_id_has_flush_ext(id)) 24506fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 2451c6fd2807SJeff Garzik } 2452c6fd2807SJeff Garzik 2453c6fd2807SJeff Garzik /* config NCQ */ 2454388539f3SShaohua Li rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2455388539f3SShaohua Li if (rc) 2456388539f3SShaohua Li return rc; 2457c6fd2807SJeff Garzik 2458c6fd2807SJeff Garzik /* print device info to dmesg */ 24593f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 24603f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 24613f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 24623f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 24633f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 24643f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 24653f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 2466c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 24673f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 24683f64f565SEric D. Mudama } 2469c6fd2807SJeff Garzik } else { 2470c6fd2807SJeff Garzik /* CHS */ 2471c6fd2807SJeff Garzik 2472c6fd2807SJeff Garzik /* Default translation */ 2473c6fd2807SJeff Garzik dev->cylinders = id[1]; 2474c6fd2807SJeff Garzik dev->heads = id[3]; 2475c6fd2807SJeff Garzik dev->sectors = id[6]; 2476c6fd2807SJeff Garzik 2477c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 2478c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 2479c6fd2807SJeff Garzik dev->cylinders = id[54]; 2480c6fd2807SJeff Garzik dev->heads = id[55]; 2481c6fd2807SJeff Garzik dev->sectors = id[56]; 2482c6fd2807SJeff Garzik } 2483c6fd2807SJeff Garzik 2484c6fd2807SJeff Garzik /* print device info to dmesg */ 24853f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 2486c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 24873f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 24883f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 24893f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 24903f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 24913f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 24923f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 24933f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 24943f64f565SEric D. Mudama dev->heads, dev->sectors); 24953f64f565SEric D. Mudama } 2496c6fd2807SJeff Garzik } 2497c6fd2807SJeff Garzik 2498c6fd2807SJeff Garzik dev->cdb_len = 16; 2499c6fd2807SJeff Garzik } 2500c6fd2807SJeff Garzik 2501c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 2502c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 2503854c73a2STejun Heo const char *cdb_intr_string = ""; 2504854c73a2STejun Heo const char *atapi_an_string = ""; 250591163006STejun Heo const char *dma_dir_string = ""; 25067d77b247STejun Heo u32 sntf; 2507c6fd2807SJeff Garzik 2508c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 2509c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 2510c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2511c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 2512c6fd2807SJeff Garzik "unsupported CDB len\n"); 2513c6fd2807SJeff Garzik rc = -EINVAL; 2514c6fd2807SJeff Garzik goto err_out_nosup; 2515c6fd2807SJeff Garzik } 2516c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 2517c6fd2807SJeff Garzik 25187d77b247STejun Heo /* Enable ATAPI AN if both the host and device have 25197d77b247STejun Heo * the support. If PMP is attached, SNTF is required 25207d77b247STejun Heo * to enable ATAPI AN to discern between PHY status 25217d77b247STejun Heo * changed notifications and ATAPI ANs. 25229f45cbd3SKristen Carlson Accardi */ 2523e7ecd435STejun Heo if (atapi_an && 2524e7ecd435STejun Heo (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 2525071f44b1STejun Heo (!sata_pmp_attached(ap) || 25267d77b247STejun Heo sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 2527854c73a2STejun Heo unsigned int err_mask; 2528854c73a2STejun Heo 25299f45cbd3SKristen Carlson Accardi /* issue SET feature command to turn this on */ 2530218f3d30SJeff Garzik err_mask = ata_dev_set_feature(dev, 2531218f3d30SJeff Garzik SETFEATURES_SATA_ENABLE, SATA_AN); 2532854c73a2STejun Heo if (err_mask) 25339f45cbd3SKristen Carlson Accardi ata_dev_printk(dev, KERN_ERR, 2534854c73a2STejun Heo "failed to enable ATAPI AN " 2535854c73a2STejun Heo "(err_mask=0x%x)\n", err_mask); 2536854c73a2STejun Heo else { 25379f45cbd3SKristen Carlson Accardi dev->flags |= ATA_DFLAG_AN; 2538854c73a2STejun Heo atapi_an_string = ", ATAPI AN"; 2539854c73a2STejun Heo } 25409f45cbd3SKristen Carlson Accardi } 25419f45cbd3SKristen Carlson Accardi 2542c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 2543c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 2544c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 2545c6fd2807SJeff Garzik } 2546c6fd2807SJeff Garzik 254791163006STejun Heo if (atapi_dmadir || atapi_id_dmadir(dev->id)) { 254891163006STejun Heo dev->flags |= ATA_DFLAG_DMADIR; 254991163006STejun Heo dma_dir_string = ", DMADIR"; 255091163006STejun Heo } 255191163006STejun Heo 2552c6fd2807SJeff Garzik /* print device info to dmesg */ 2553c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2554ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 255591163006STejun Heo "ATAPI: %s, %s, max %s%s%s%s\n", 2556ef143d57SAlbert Lee modelbuf, fwrevbuf, 2557c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 255891163006STejun Heo cdb_intr_string, atapi_an_string, 255991163006STejun Heo dma_dir_string); 2560c6fd2807SJeff Garzik } 2561c6fd2807SJeff Garzik 2562914ed354STejun Heo /* determine max_sectors */ 2563914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 2564914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 2565914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 2566914ed354STejun Heo 2567ca77329fSKristen Carlson Accardi if (!(dev->horkage & ATA_HORKAGE_IPM)) { 2568ca77329fSKristen Carlson Accardi if (ata_id_has_hipm(dev->id)) 2569ca77329fSKristen Carlson Accardi dev->flags |= ATA_DFLAG_HIPM; 2570ca77329fSKristen Carlson Accardi if (ata_id_has_dipm(dev->id)) 2571ca77329fSKristen Carlson Accardi dev->flags |= ATA_DFLAG_DIPM; 2572ca77329fSKristen Carlson Accardi } 2573ca77329fSKristen Carlson Accardi 2574c5038fc0SAlan Cox /* Limit PATA drive on SATA cable bridge transfers to udma5, 2575c5038fc0SAlan Cox 200 sectors */ 2576c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2577c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2578c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2579c6fd2807SJeff Garzik "applying bridge limits\n"); 2580c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2581c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2582c6fd2807SJeff Garzik } 2583c6fd2807SJeff Garzik 2584f8d8e579STony Battersby if ((dev->class == ATA_DEV_ATAPI) && 2585f442cd86SAlbert Lee (atapi_command_packet_set(id) == TYPE_TAPE)) { 2586f8d8e579STony Battersby dev->max_sectors = ATA_MAX_SECTORS_TAPE; 2587f442cd86SAlbert Lee dev->horkage |= ATA_HORKAGE_STUCK_ERR; 2588f442cd86SAlbert Lee } 2589f8d8e579STony Battersby 259075683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 259103ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 259203ec52deSTejun Heo dev->max_sectors); 259318d6e9d5SAlbert Lee 2594ca77329fSKristen Carlson Accardi if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { 2595ca77329fSKristen Carlson Accardi dev->horkage |= ATA_HORKAGE_IPM; 2596ca77329fSKristen Carlson Accardi 2597ca77329fSKristen Carlson Accardi /* reset link pm_policy for this port to no pm */ 2598ca77329fSKristen Carlson Accardi ap->pm_policy = MAX_PERFORMANCE; 2599ca77329fSKristen Carlson Accardi } 2600ca77329fSKristen Carlson Accardi 2601c6fd2807SJeff Garzik if (ap->ops->dev_config) 2602cd0d3bbcSAlan ap->ops->dev_config(dev); 2603c6fd2807SJeff Garzik 2604c5038fc0SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 2605c5038fc0SAlan Cox /* Let the user know. We don't want to disallow opens for 2606c5038fc0SAlan Cox rescue purposes, or in case the vendor is just a blithering 2607c5038fc0SAlan Cox idiot. Do this after the dev_config call as some controllers 2608c5038fc0SAlan Cox with buggy firmware may want to avoid reporting false device 2609c5038fc0SAlan Cox bugs */ 2610c5038fc0SAlan Cox 2611c5038fc0SAlan Cox if (print_info) { 2612c5038fc0SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2613c5038fc0SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 2614c5038fc0SAlan Cox ata_dev_printk(dev, KERN_WARNING, 2615c5038fc0SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 2616c5038fc0SAlan Cox } 2617c5038fc0SAlan Cox } 2618c5038fc0SAlan Cox 2619ac70a964STejun Heo if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { 2620ac70a964STejun Heo ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires " 2621ac70a964STejun Heo "firmware update to be fully functional.\n"); 2622ac70a964STejun Heo ata_dev_printk(dev, KERN_WARNING, " contact the vendor " 2623ac70a964STejun Heo "or visit http://ata.wiki.kernel.org.\n"); 2624ac70a964STejun Heo } 2625ac70a964STejun Heo 2626c6fd2807SJeff Garzik return 0; 2627c6fd2807SJeff Garzik 2628c6fd2807SJeff Garzik err_out_nosup: 2629c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2630c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 26317f5e4e8dSHarvey Harrison "%s: EXIT, err\n", __func__); 2632c6fd2807SJeff Garzik return rc; 2633c6fd2807SJeff Garzik } 2634c6fd2807SJeff Garzik 2635c6fd2807SJeff Garzik /** 26362e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2637be0d18dfSAlan Cox * @ap: port 2638be0d18dfSAlan Cox * 26392e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2640be0d18dfSAlan Cox * detection. 2641be0d18dfSAlan Cox */ 2642be0d18dfSAlan Cox 2643be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2644be0d18dfSAlan Cox { 2645be0d18dfSAlan Cox return ATA_CBL_PATA40; 2646be0d18dfSAlan Cox } 2647be0d18dfSAlan Cox 2648be0d18dfSAlan Cox /** 26492e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2650be0d18dfSAlan Cox * @ap: port 2651be0d18dfSAlan Cox * 26522e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2653be0d18dfSAlan Cox * detection. 2654be0d18dfSAlan Cox */ 2655be0d18dfSAlan Cox 2656be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2657be0d18dfSAlan Cox { 2658be0d18dfSAlan Cox return ATA_CBL_PATA80; 2659be0d18dfSAlan Cox } 2660be0d18dfSAlan Cox 2661be0d18dfSAlan Cox /** 2662be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2663be0d18dfSAlan Cox * @ap: port 2664be0d18dfSAlan Cox * 2665be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2666be0d18dfSAlan Cox */ 2667be0d18dfSAlan Cox 2668be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2669be0d18dfSAlan Cox { 2670be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2671be0d18dfSAlan Cox } 2672be0d18dfSAlan Cox 2673be0d18dfSAlan Cox /** 2674c88f90c3STejun Heo * ata_cable_ignore - return ignored PATA cable. 2675c88f90c3STejun Heo * @ap: port 2676c88f90c3STejun Heo * 2677c88f90c3STejun Heo * Helper method for drivers which don't use cable type to limit 2678c88f90c3STejun Heo * transfer mode. 2679c88f90c3STejun Heo */ 2680c88f90c3STejun Heo int ata_cable_ignore(struct ata_port *ap) 2681c88f90c3STejun Heo { 2682c88f90c3STejun Heo return ATA_CBL_PATA_IGN; 2683c88f90c3STejun Heo } 2684c88f90c3STejun Heo 2685c88f90c3STejun Heo /** 2686be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2687be0d18dfSAlan Cox * @ap: port 2688be0d18dfSAlan Cox * 2689be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2690be0d18dfSAlan Cox */ 2691be0d18dfSAlan Cox 2692be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2693be0d18dfSAlan Cox { 2694be0d18dfSAlan Cox return ATA_CBL_SATA; 2695be0d18dfSAlan Cox } 2696be0d18dfSAlan Cox 2697be0d18dfSAlan Cox /** 2698c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2699c6fd2807SJeff Garzik * @ap: Bus to probe 2700c6fd2807SJeff Garzik * 2701c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2702c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2703c6fd2807SJeff Garzik * the bus. 2704c6fd2807SJeff Garzik * 2705c6fd2807SJeff Garzik * LOCKING: 2706c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2707c6fd2807SJeff Garzik * 2708c6fd2807SJeff Garzik * RETURNS: 2709c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2710c6fd2807SJeff Garzik */ 2711c6fd2807SJeff Garzik 2712c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2713c6fd2807SJeff Garzik { 2714c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2715c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 2716f58229f8STejun Heo int rc; 2717c6fd2807SJeff Garzik struct ata_device *dev; 2718c6fd2807SJeff Garzik 27191eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ALL) 2720f58229f8STejun Heo tries[dev->devno] = ATA_PROBE_MAX_TRIES; 2721c6fd2807SJeff Garzik 2722c6fd2807SJeff Garzik retry: 27231eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ALL) { 2724cdeab114STejun Heo /* If we issue an SRST then an ATA drive (not ATAPI) 2725cdeab114STejun Heo * may change configuration and be in PIO0 timing. If 2726cdeab114STejun Heo * we do a hard reset (or are coming from power on) 2727cdeab114STejun Heo * this is true for ATA or ATAPI. Until we've set a 2728cdeab114STejun Heo * suitable controller mode we should not touch the 2729cdeab114STejun Heo * bus as we may be talking too fast. 2730cdeab114STejun Heo */ 2731cdeab114STejun Heo dev->pio_mode = XFER_PIO_0; 2732cdeab114STejun Heo 2733cdeab114STejun Heo /* If the controller has a pio mode setup function 2734cdeab114STejun Heo * then use it to set the chipset to rights. Don't 2735cdeab114STejun Heo * touch the DMA setup as that will be dealt with when 2736cdeab114STejun Heo * configuring devices. 2737cdeab114STejun Heo */ 2738cdeab114STejun Heo if (ap->ops->set_piomode) 2739cdeab114STejun Heo ap->ops->set_piomode(ap, dev); 2740cdeab114STejun Heo } 2741cdeab114STejun Heo 2742c6fd2807SJeff Garzik /* reset and determine device classes */ 2743c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2744c6fd2807SJeff Garzik 27451eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ALL) { 27463e4ec344STejun Heo if (dev->class != ATA_DEV_UNKNOWN) 2747c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2748c6fd2807SJeff Garzik else 2749c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2750c6fd2807SJeff Garzik 2751c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2752c6fd2807SJeff Garzik } 2753c6fd2807SJeff Garzik 2754f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2755f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2756f31f0cc2SJeff Garzik the slave device */ 2757f31f0cc2SJeff Garzik 27581eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { 2759f58229f8STejun Heo if (tries[dev->devno]) 2760f58229f8STejun Heo dev->class = classes[dev->devno]; 2761c6fd2807SJeff Garzik 2762c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2763c6fd2807SJeff Garzik continue; 2764c6fd2807SJeff Garzik 2765bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2766bff04647STejun Heo dev->id); 2767c6fd2807SJeff Garzik if (rc) 2768c6fd2807SJeff Garzik goto fail; 2769f31f0cc2SJeff Garzik } 2770f31f0cc2SJeff Garzik 2771be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2772be0d18dfSAlan Cox if (ap->ops->cable_detect) 2773be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2774be0d18dfSAlan Cox 27751eca4365STejun Heo /* We may have SATA bridge glue hiding here irrespective of 27761eca4365STejun Heo * the reported cable types and sensed types. When SATA 27771eca4365STejun Heo * drives indicate we have a bridge, we don't know which end 27781eca4365STejun Heo * of the link the bridge is which is a problem. 27791eca4365STejun Heo */ 27801eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ENABLED) 2781614fe29bSAlan Cox if (ata_id_is_sata(dev->id)) 2782614fe29bSAlan Cox ap->cbl = ATA_CBL_SATA; 2783614fe29bSAlan Cox 2784f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2785f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2786f31f0cc2SJeff Garzik 27871eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ENABLED) { 27889af5c9c9STejun Heo ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; 2789efdaedc4STejun Heo rc = ata_dev_configure(dev); 27909af5c9c9STejun Heo ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2791c6fd2807SJeff Garzik if (rc) 2792c6fd2807SJeff Garzik goto fail; 2793c6fd2807SJeff Garzik } 2794c6fd2807SJeff Garzik 2795c6fd2807SJeff Garzik /* configure transfer mode */ 27960260731fSTejun Heo rc = ata_set_mode(&ap->link, &dev); 27974ae72a1eSTejun Heo if (rc) 2798c6fd2807SJeff Garzik goto fail; 2799c6fd2807SJeff Garzik 28001eca4365STejun Heo ata_for_each_dev(dev, &ap->link, ENABLED) 2801c6fd2807SJeff Garzik return 0; 2802c6fd2807SJeff Garzik 2803c6fd2807SJeff Garzik return -ENODEV; 2804c6fd2807SJeff Garzik 2805c6fd2807SJeff Garzik fail: 28064ae72a1eSTejun Heo tries[dev->devno]--; 28074ae72a1eSTejun Heo 2808c6fd2807SJeff Garzik switch (rc) { 2809c6fd2807SJeff Garzik case -EINVAL: 28104ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2811c6fd2807SJeff Garzik tries[dev->devno] = 0; 2812c6fd2807SJeff Garzik break; 28134ae72a1eSTejun Heo 28144ae72a1eSTejun Heo case -ENODEV: 28154ae72a1eSTejun Heo /* give it just one more chance */ 28164ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2817c6fd2807SJeff Garzik case -EIO: 28184ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 28194ae72a1eSTejun Heo /* This is the last chance, better to slow 28204ae72a1eSTejun Heo * down than lose it. 28214ae72a1eSTejun Heo */ 2822a07d499bSTejun Heo sata_down_spd_limit(&ap->link, 0); 28234ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 28244ae72a1eSTejun Heo } 2825c6fd2807SJeff Garzik } 2826c6fd2807SJeff Garzik 28274ae72a1eSTejun Heo if (!tries[dev->devno]) 2828c6fd2807SJeff Garzik ata_dev_disable(dev); 2829c6fd2807SJeff Garzik 2830c6fd2807SJeff Garzik goto retry; 2831c6fd2807SJeff Garzik } 2832c6fd2807SJeff Garzik 2833c6fd2807SJeff Garzik /** 2834c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2835936fd732STejun Heo * @link: SATA link to printk link status about 2836c6fd2807SJeff Garzik * 2837c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2838c6fd2807SJeff Garzik * 2839c6fd2807SJeff Garzik * LOCKING: 2840c6fd2807SJeff Garzik * None. 2841c6fd2807SJeff Garzik */ 28426bdb4fc9SAdrian Bunk static void sata_print_link_status(struct ata_link *link) 2843c6fd2807SJeff Garzik { 2844c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2845c6fd2807SJeff Garzik 2846936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus)) 2847c6fd2807SJeff Garzik return; 2848936fd732STejun Heo sata_scr_read(link, SCR_CONTROL, &scontrol); 2849c6fd2807SJeff Garzik 2850b1c72916STejun Heo if (ata_phys_link_online(link)) { 2851c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2852936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2853c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2854c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2855c6fd2807SJeff Garzik } else { 2856936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2857c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2858c6fd2807SJeff Garzik sstatus, scontrol); 2859c6fd2807SJeff Garzik } 2860c6fd2807SJeff Garzik } 2861c6fd2807SJeff Garzik 2862c6fd2807SJeff Garzik /** 2863c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2864c6fd2807SJeff Garzik * @adev: device 2865c6fd2807SJeff Garzik * 2866c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2867c6fd2807SJeff Garzik * present NULL is returned 2868c6fd2807SJeff Garzik */ 2869c6fd2807SJeff Garzik 2870c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2871c6fd2807SJeff Garzik { 28729af5c9c9STejun Heo struct ata_link *link = adev->link; 28739af5c9c9STejun Heo struct ata_device *pair = &link->device[1 - adev->devno]; 2874c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2875c6fd2807SJeff Garzik return NULL; 2876c6fd2807SJeff Garzik return pair; 2877c6fd2807SJeff Garzik } 2878c6fd2807SJeff Garzik 2879c6fd2807SJeff Garzik /** 2880c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2881936fd732STejun Heo * @link: Link to adjust SATA spd limit for 2882a07d499bSTejun Heo * @spd_limit: Additional limit 2883c6fd2807SJeff Garzik * 2884936fd732STejun Heo * Adjust SATA spd limit of @link downward. Note that this 2885c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2886c6fd2807SJeff Garzik * using sata_set_spd(). 2887c6fd2807SJeff Garzik * 2888a07d499bSTejun Heo * If @spd_limit is non-zero, the speed is limited to equal to or 2889a07d499bSTejun Heo * lower than @spd_limit if such speed is supported. If 2890a07d499bSTejun Heo * @spd_limit is slower than any supported speed, only the lowest 2891a07d499bSTejun Heo * supported speed is allowed. 2892a07d499bSTejun Heo * 2893c6fd2807SJeff Garzik * LOCKING: 2894c6fd2807SJeff Garzik * Inherited from caller. 2895c6fd2807SJeff Garzik * 2896c6fd2807SJeff Garzik * RETURNS: 2897c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2898c6fd2807SJeff Garzik */ 2899a07d499bSTejun Heo int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) 2900c6fd2807SJeff Garzik { 2901c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2902a07d499bSTejun Heo int rc, bit; 2903c6fd2807SJeff Garzik 2904936fd732STejun Heo if (!sata_scr_valid(link)) 2905008a7896STejun Heo return -EOPNOTSUPP; 2906008a7896STejun Heo 2907008a7896STejun Heo /* If SCR can be read, use it to determine the current SPD. 2908936fd732STejun Heo * If not, use cached value in link->sata_spd. 2909008a7896STejun Heo */ 2910936fd732STejun Heo rc = sata_scr_read(link, SCR_STATUS, &sstatus); 29119913ff8aSTejun Heo if (rc == 0 && ata_sstatus_online(sstatus)) 2912008a7896STejun Heo spd = (sstatus >> 4) & 0xf; 2913008a7896STejun Heo else 2914936fd732STejun Heo spd = link->sata_spd; 2915c6fd2807SJeff Garzik 2916936fd732STejun Heo mask = link->sata_spd_limit; 2917c6fd2807SJeff Garzik if (mask <= 1) 2918c6fd2807SJeff Garzik return -EINVAL; 2919008a7896STejun Heo 2920008a7896STejun Heo /* unconditionally mask off the highest bit */ 2921a07d499bSTejun Heo bit = fls(mask) - 1; 2922a07d499bSTejun Heo mask &= ~(1 << bit); 2923c6fd2807SJeff Garzik 2924008a7896STejun Heo /* Mask off all speeds higher than or equal to the current 2925008a7896STejun Heo * one. Force 1.5Gbps if current SPD is not available. 2926008a7896STejun Heo */ 2927008a7896STejun Heo if (spd > 1) 2928008a7896STejun Heo mask &= (1 << (spd - 1)) - 1; 2929008a7896STejun Heo else 2930008a7896STejun Heo mask &= 1; 2931008a7896STejun Heo 2932008a7896STejun Heo /* were we already at the bottom? */ 2933c6fd2807SJeff Garzik if (!mask) 2934c6fd2807SJeff Garzik return -EINVAL; 2935c6fd2807SJeff Garzik 2936a07d499bSTejun Heo if (spd_limit) { 2937a07d499bSTejun Heo if (mask & ((1 << spd_limit) - 1)) 2938a07d499bSTejun Heo mask &= (1 << spd_limit) - 1; 2939a07d499bSTejun Heo else { 2940a07d499bSTejun Heo bit = ffs(mask) - 1; 2941a07d499bSTejun Heo mask = 1 << bit; 2942a07d499bSTejun Heo } 2943a07d499bSTejun Heo } 2944a07d499bSTejun Heo 2945936fd732STejun Heo link->sata_spd_limit = mask; 2946c6fd2807SJeff Garzik 2947936fd732STejun Heo ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", 2948c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2949c6fd2807SJeff Garzik 2950c6fd2807SJeff Garzik return 0; 2951c6fd2807SJeff Garzik } 2952c6fd2807SJeff Garzik 2953936fd732STejun Heo static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) 2954c6fd2807SJeff Garzik { 29555270222fSTejun Heo struct ata_link *host_link = &link->ap->link; 29565270222fSTejun Heo u32 limit, target, spd; 2957c6fd2807SJeff Garzik 29585270222fSTejun Heo limit = link->sata_spd_limit; 29595270222fSTejun Heo 29605270222fSTejun Heo /* Don't configure downstream link faster than upstream link. 29615270222fSTejun Heo * It doesn't speed up anything and some PMPs choke on such 29625270222fSTejun Heo * configuration. 29635270222fSTejun Heo */ 29645270222fSTejun Heo if (!ata_is_host_link(link) && host_link->sata_spd) 29655270222fSTejun Heo limit &= (1 << host_link->sata_spd) - 1; 29665270222fSTejun Heo 29675270222fSTejun Heo if (limit == UINT_MAX) 29685270222fSTejun Heo target = 0; 2969c6fd2807SJeff Garzik else 29705270222fSTejun Heo target = fls(limit); 2971c6fd2807SJeff Garzik 2972c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 29735270222fSTejun Heo *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); 2974c6fd2807SJeff Garzik 29755270222fSTejun Heo return spd != target; 2976c6fd2807SJeff Garzik } 2977c6fd2807SJeff Garzik 2978c6fd2807SJeff Garzik /** 2979c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2980936fd732STejun Heo * @link: Link in question 2981c6fd2807SJeff Garzik * 2982c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2983936fd732STejun Heo * @link->sata_spd_limit. This function is used to determine 2984c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2985c6fd2807SJeff Garzik * configuration. 2986c6fd2807SJeff Garzik * 2987c6fd2807SJeff Garzik * LOCKING: 2988c6fd2807SJeff Garzik * Inherited from caller. 2989c6fd2807SJeff Garzik * 2990c6fd2807SJeff Garzik * RETURNS: 2991c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2992c6fd2807SJeff Garzik */ 29931dc55e87SAdrian Bunk static int sata_set_spd_needed(struct ata_link *link) 2994c6fd2807SJeff Garzik { 2995c6fd2807SJeff Garzik u32 scontrol; 2996c6fd2807SJeff Garzik 2997936fd732STejun Heo if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 2998db64bcf3STejun Heo return 1; 2999c6fd2807SJeff Garzik 3000936fd732STejun Heo return __sata_set_spd_needed(link, &scontrol); 3001c6fd2807SJeff Garzik } 3002c6fd2807SJeff Garzik 3003c6fd2807SJeff Garzik /** 3004c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 3005936fd732STejun Heo * @link: Link to set SATA spd for 3006c6fd2807SJeff Garzik * 3007936fd732STejun Heo * Set SATA spd of @link according to sata_spd_limit. 3008c6fd2807SJeff Garzik * 3009c6fd2807SJeff Garzik * LOCKING: 3010c6fd2807SJeff Garzik * Inherited from caller. 3011c6fd2807SJeff Garzik * 3012c6fd2807SJeff Garzik * RETURNS: 3013c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 3014c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 3015c6fd2807SJeff Garzik */ 3016936fd732STejun Heo int sata_set_spd(struct ata_link *link) 3017c6fd2807SJeff Garzik { 3018c6fd2807SJeff Garzik u32 scontrol; 3019c6fd2807SJeff Garzik int rc; 3020c6fd2807SJeff Garzik 3021936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3022c6fd2807SJeff Garzik return rc; 3023c6fd2807SJeff Garzik 3024936fd732STejun Heo if (!__sata_set_spd_needed(link, &scontrol)) 3025c6fd2807SJeff Garzik return 0; 3026c6fd2807SJeff Garzik 3027936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3028c6fd2807SJeff Garzik return rc; 3029c6fd2807SJeff Garzik 3030c6fd2807SJeff Garzik return 1; 3031c6fd2807SJeff Garzik } 3032c6fd2807SJeff Garzik 3033c6fd2807SJeff Garzik /* 3034c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 3035c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 3036c6fd2807SJeff Garzik */ 3037c6fd2807SJeff Garzik /* 3038b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 3039c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 3040b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 3041b352e57dSAlan Cox * 3042b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 3043c6fd2807SJeff Garzik */ 3044c6fd2807SJeff Garzik 3045c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 30463ada9c12SDavid Daney /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */ 30473ada9c12SDavid Daney { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 }, 30483ada9c12SDavid Daney { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 }, 30493ada9c12SDavid Daney { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 }, 30503ada9c12SDavid Daney { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 }, 30513ada9c12SDavid Daney { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 }, 30523ada9c12SDavid Daney { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 }, 30533ada9c12SDavid Daney { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 }, 3054c6fd2807SJeff Garzik 30553ada9c12SDavid Daney { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 }, 30563ada9c12SDavid Daney { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 }, 30573ada9c12SDavid Daney { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 }, 3058c6fd2807SJeff Garzik 30593ada9c12SDavid Daney { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 }, 30603ada9c12SDavid Daney { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 }, 30613ada9c12SDavid Daney { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 }, 30623ada9c12SDavid Daney { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 }, 30633ada9c12SDavid Daney { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 }, 3064c6fd2807SJeff Garzik 30653ada9c12SDavid Daney /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 30663ada9c12SDavid Daney { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 }, 30673ada9c12SDavid Daney { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 }, 30683ada9c12SDavid Daney { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 }, 30693ada9c12SDavid Daney { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 }, 30703ada9c12SDavid Daney { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 }, 30713ada9c12SDavid Daney { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 }, 30723ada9c12SDavid Daney { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 }, 3073c6fd2807SJeff Garzik 3074c6fd2807SJeff Garzik { 0xFF } 3075c6fd2807SJeff Garzik }; 3076c6fd2807SJeff Garzik 3077c6fd2807SJeff Garzik #define ENOUGH(v, unit) (((v)-1)/(unit)+1) 3078c6fd2807SJeff Garzik #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) 3079c6fd2807SJeff Garzik 3080c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 3081c6fd2807SJeff Garzik { 3082c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 3083c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 3084c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 3085c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 3086c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 3087c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 30883ada9c12SDavid Daney q->dmack_hold = EZ(t->dmack_hold * 1000, T); 3089c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 3090c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 3091c6fd2807SJeff Garzik } 3092c6fd2807SJeff Garzik 3093c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 3094c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 3095c6fd2807SJeff Garzik { 3096c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 3097c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 3098c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 3099c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 3100c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 3101c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 31023ada9c12SDavid Daney if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold); 3103c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 3104c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 3105c6fd2807SJeff Garzik } 3106c6fd2807SJeff Garzik 31076357357cSTejun Heo const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) 3108c6fd2807SJeff Garzik { 310970cd071eSTejun Heo const struct ata_timing *t = ata_timing; 3110c6fd2807SJeff Garzik 311170cd071eSTejun Heo while (xfer_mode > t->mode) 311270cd071eSTejun Heo t++; 311370cd071eSTejun Heo 311470cd071eSTejun Heo if (xfer_mode == t->mode) 3115c6fd2807SJeff Garzik return t; 311670cd071eSTejun Heo return NULL; 3117c6fd2807SJeff Garzik } 3118c6fd2807SJeff Garzik 3119c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 3120c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 3121c6fd2807SJeff Garzik { 31229e8808a9SBartlomiej Zolnierkiewicz const u16 *id = adev->id; 3123c6fd2807SJeff Garzik const struct ata_timing *s; 3124c6fd2807SJeff Garzik struct ata_timing p; 3125c6fd2807SJeff Garzik 3126c6fd2807SJeff Garzik /* 3127c6fd2807SJeff Garzik * Find the mode. 3128c6fd2807SJeff Garzik */ 3129c6fd2807SJeff Garzik 3130c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 3131c6fd2807SJeff Garzik return -EINVAL; 3132c6fd2807SJeff Garzik 3133c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 3134c6fd2807SJeff Garzik 3135c6fd2807SJeff Garzik /* 3136c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 3137c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 3138c6fd2807SJeff Garzik */ 3139c6fd2807SJeff Garzik 31409e8808a9SBartlomiej Zolnierkiewicz if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 3141c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 31429e8808a9SBartlomiej Zolnierkiewicz 3143c6fd2807SJeff Garzik if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 31449e8808a9SBartlomiej Zolnierkiewicz if (speed <= XFER_PIO_2) 31459e8808a9SBartlomiej Zolnierkiewicz p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO]; 31469e8808a9SBartlomiej Zolnierkiewicz else if ((speed <= XFER_PIO_4) || 31479e8808a9SBartlomiej Zolnierkiewicz (speed == XFER_PIO_5 && !ata_id_is_cfa(id))) 31489e8808a9SBartlomiej Zolnierkiewicz p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY]; 31499e8808a9SBartlomiej Zolnierkiewicz } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) 31509e8808a9SBartlomiej Zolnierkiewicz p.cycle = id[ATA_ID_EIDE_DMA_MIN]; 31519e8808a9SBartlomiej Zolnierkiewicz 3152c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 3153c6fd2807SJeff Garzik } 3154c6fd2807SJeff Garzik 3155c6fd2807SJeff Garzik /* 3156c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 3157c6fd2807SJeff Garzik */ 3158c6fd2807SJeff Garzik 3159c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 3160c6fd2807SJeff Garzik 3161c6fd2807SJeff Garzik /* 3162c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 3163c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 3164c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 3165c6fd2807SJeff Garzik */ 3166c6fd2807SJeff Garzik 3167fd3367afSAlan if (speed > XFER_PIO_6) { 3168c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 3169c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 3170c6fd2807SJeff Garzik } 3171c6fd2807SJeff Garzik 3172c6fd2807SJeff Garzik /* 3173c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 3174c6fd2807SJeff Garzik */ 3175c6fd2807SJeff Garzik 3176c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 3177c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 3178c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 3179c6fd2807SJeff Garzik } 3180c6fd2807SJeff Garzik 3181c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 3182c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 3183c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 3184c6fd2807SJeff Garzik } 31854f701d1eSAlan Cox 31864f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 31874f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 31884f701d1eSAlan Cox if so we must correct this */ 31894f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 31904f701d1eSAlan Cox t->cycle = t->active + t->recover; 3191c6fd2807SJeff Garzik 3192c6fd2807SJeff Garzik return 0; 3193c6fd2807SJeff Garzik } 3194c6fd2807SJeff Garzik 3195c6fd2807SJeff Garzik /** 3196a0f79b92STejun Heo * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3197a0f79b92STejun Heo * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3198a0f79b92STejun Heo * @cycle: cycle duration in ns 3199a0f79b92STejun Heo * 3200a0f79b92STejun Heo * Return matching xfer mode for @cycle. The returned mode is of 3201a0f79b92STejun Heo * the transfer type specified by @xfer_shift. If @cycle is too 3202a0f79b92STejun Heo * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3203a0f79b92STejun Heo * than the fastest known mode, the fasted mode is returned. 3204a0f79b92STejun Heo * 3205a0f79b92STejun Heo * LOCKING: 3206a0f79b92STejun Heo * None. 3207a0f79b92STejun Heo * 3208a0f79b92STejun Heo * RETURNS: 3209a0f79b92STejun Heo * Matching xfer_mode, 0xff if no match found. 3210a0f79b92STejun Heo */ 3211a0f79b92STejun Heo u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3212a0f79b92STejun Heo { 3213a0f79b92STejun Heo u8 base_mode = 0xff, last_mode = 0xff; 3214a0f79b92STejun Heo const struct ata_xfer_ent *ent; 3215a0f79b92STejun Heo const struct ata_timing *t; 3216a0f79b92STejun Heo 3217a0f79b92STejun Heo for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3218a0f79b92STejun Heo if (ent->shift == xfer_shift) 3219a0f79b92STejun Heo base_mode = ent->base; 3220a0f79b92STejun Heo 3221a0f79b92STejun Heo for (t = ata_timing_find_mode(base_mode); 3222a0f79b92STejun Heo t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3223a0f79b92STejun Heo unsigned short this_cycle; 3224a0f79b92STejun Heo 3225a0f79b92STejun Heo switch (xfer_shift) { 3226a0f79b92STejun Heo case ATA_SHIFT_PIO: 3227a0f79b92STejun Heo case ATA_SHIFT_MWDMA: 3228a0f79b92STejun Heo this_cycle = t->cycle; 3229a0f79b92STejun Heo break; 3230a0f79b92STejun Heo case ATA_SHIFT_UDMA: 3231a0f79b92STejun Heo this_cycle = t->udma; 3232a0f79b92STejun Heo break; 3233a0f79b92STejun Heo default: 3234a0f79b92STejun Heo return 0xff; 3235a0f79b92STejun Heo } 3236a0f79b92STejun Heo 3237a0f79b92STejun Heo if (cycle > this_cycle) 3238a0f79b92STejun Heo break; 3239a0f79b92STejun Heo 3240a0f79b92STejun Heo last_mode = t->mode; 3241a0f79b92STejun Heo } 3242a0f79b92STejun Heo 3243a0f79b92STejun Heo return last_mode; 3244a0f79b92STejun Heo } 3245a0f79b92STejun Heo 3246a0f79b92STejun Heo /** 3247c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 3248c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 3249458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 3250c6fd2807SJeff Garzik * 3251c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 3252c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 3253c6fd2807SJeff Garzik * will apply the limit. 3254c6fd2807SJeff Garzik * 3255c6fd2807SJeff Garzik * LOCKING: 3256c6fd2807SJeff Garzik * Inherited from caller. 3257c6fd2807SJeff Garzik * 3258c6fd2807SJeff Garzik * RETURNS: 3259c6fd2807SJeff Garzik * 0 on success, negative errno on failure 3260c6fd2807SJeff Garzik */ 3261458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3262c6fd2807SJeff Garzik { 3263458337dbSTejun Heo char buf[32]; 32647dc951aeSTejun Heo unsigned long orig_mask, xfer_mask; 32657dc951aeSTejun Heo unsigned long pio_mask, mwdma_mask, udma_mask; 3266458337dbSTejun Heo int quiet, highbit; 3267c6fd2807SJeff Garzik 3268458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 3269458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 3270458337dbSTejun Heo 3271458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3272458337dbSTejun Heo dev->mwdma_mask, 3273c6fd2807SJeff Garzik dev->udma_mask); 3274458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3275c6fd2807SJeff Garzik 3276458337dbSTejun Heo switch (sel) { 3277458337dbSTejun Heo case ATA_DNXFER_PIO: 3278458337dbSTejun Heo highbit = fls(pio_mask) - 1; 3279458337dbSTejun Heo pio_mask &= ~(1 << highbit); 3280458337dbSTejun Heo break; 3281458337dbSTejun Heo 3282458337dbSTejun Heo case ATA_DNXFER_DMA: 3283458337dbSTejun Heo if (udma_mask) { 3284458337dbSTejun Heo highbit = fls(udma_mask) - 1; 3285458337dbSTejun Heo udma_mask &= ~(1 << highbit); 3286458337dbSTejun Heo if (!udma_mask) 3287458337dbSTejun Heo return -ENOENT; 3288458337dbSTejun Heo } else if (mwdma_mask) { 3289458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 3290458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 3291458337dbSTejun Heo if (!mwdma_mask) 3292458337dbSTejun Heo return -ENOENT; 3293458337dbSTejun Heo } 3294458337dbSTejun Heo break; 3295458337dbSTejun Heo 3296458337dbSTejun Heo case ATA_DNXFER_40C: 3297458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 3298458337dbSTejun Heo break; 3299458337dbSTejun Heo 3300458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 3301458337dbSTejun Heo pio_mask &= 1; 3302458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 3303458337dbSTejun Heo mwdma_mask = 0; 3304458337dbSTejun Heo udma_mask = 0; 3305458337dbSTejun Heo break; 3306458337dbSTejun Heo 3307458337dbSTejun Heo default: 3308458337dbSTejun Heo BUG(); 3309458337dbSTejun Heo } 3310458337dbSTejun Heo 3311458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3312458337dbSTejun Heo 3313458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3314458337dbSTejun Heo return -ENOENT; 3315458337dbSTejun Heo 3316458337dbSTejun Heo if (!quiet) { 3317458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3318458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 3319458337dbSTejun Heo ata_mode_string(xfer_mask), 3320458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3321458337dbSTejun Heo else 3322458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 3323458337dbSTejun Heo ata_mode_string(xfer_mask)); 3324458337dbSTejun Heo 3325458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 3326458337dbSTejun Heo "limiting speed to %s\n", buf); 3327458337dbSTejun Heo } 3328c6fd2807SJeff Garzik 3329c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3330c6fd2807SJeff Garzik &dev->udma_mask); 3331c6fd2807SJeff Garzik 3332c6fd2807SJeff Garzik return 0; 3333c6fd2807SJeff Garzik } 3334c6fd2807SJeff Garzik 3335c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 3336c6fd2807SJeff Garzik { 3337d0cb43b3STejun Heo struct ata_port *ap = dev->link->ap; 33389af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 3339d0cb43b3STejun Heo const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; 33404055dee7STejun Heo const char *dev_err_whine = ""; 33414055dee7STejun Heo int ign_dev_err = 0; 3342d0cb43b3STejun Heo unsigned int err_mask = 0; 3343c6fd2807SJeff Garzik int rc; 3344c6fd2807SJeff Garzik 3345c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 3346c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 3347c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 3348c6fd2807SJeff Garzik 3349d0cb43b3STejun Heo if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) 3350d0cb43b3STejun Heo dev_err_whine = " (SET_XFERMODE skipped)"; 3351d0cb43b3STejun Heo else { 3352d0cb43b3STejun Heo if (nosetxfer) 3353d0cb43b3STejun Heo ata_dev_printk(dev, KERN_WARNING, 3354d0cb43b3STejun Heo "NOSETXFER but PATA detected - can't " 3355d0cb43b3STejun Heo "skip SETXFER, might malfunction\n"); 3356c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 3357d0cb43b3STejun Heo } 33582dcb407eSJeff Garzik 33594055dee7STejun Heo if (err_mask & ~AC_ERR_DEV) 33604055dee7STejun Heo goto fail; 33612dcb407eSJeff Garzik 33624055dee7STejun Heo /* revalidate */ 3363baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 3364422c9daaSTejun Heo rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3365baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3366c6fd2807SJeff Garzik if (rc) 3367c6fd2807SJeff Garzik return rc; 3368c6fd2807SJeff Garzik 3369b93fda12SAlan Cox if (dev->xfer_shift == ATA_SHIFT_PIO) { 33704055dee7STejun Heo /* Old CFA may refuse this command, which is just fine */ 3371b93fda12SAlan Cox if (ata_id_is_cfa(dev->id)) 33724055dee7STejun Heo ign_dev_err = 1; 3373b93fda12SAlan Cox /* Catch several broken garbage emulations plus some pre 3374b93fda12SAlan Cox ATA devices */ 3375b93fda12SAlan Cox if (ata_id_major_version(dev->id) == 0 && 33764055dee7STejun Heo dev->pio_mode <= XFER_PIO_2) 33774055dee7STejun Heo ign_dev_err = 1; 3378b93fda12SAlan Cox /* Some very old devices and some bad newer ones fail 3379b93fda12SAlan Cox any kind of SET_XFERMODE request but support PIO0-2 3380b93fda12SAlan Cox timings and no IORDY */ 3381b93fda12SAlan Cox if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3382b93fda12SAlan Cox ign_dev_err = 1; 3383b93fda12SAlan Cox } 33844055dee7STejun Heo /* Early MWDMA devices do DMA but don't allow DMA mode setting. 33854055dee7STejun Heo Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 33864055dee7STejun Heo if (dev->xfer_shift == ATA_SHIFT_MWDMA && 33874055dee7STejun Heo dev->dma_mode == XFER_MW_DMA_0 && 33884055dee7STejun Heo (dev->id[63] >> 8) & 1) 33894055dee7STejun Heo ign_dev_err = 1; 33904055dee7STejun Heo 33914055dee7STejun Heo /* if the device is actually configured correctly, ignore dev err */ 33924055dee7STejun Heo if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 33934055dee7STejun Heo ign_dev_err = 1; 33944055dee7STejun Heo 33954055dee7STejun Heo if (err_mask & AC_ERR_DEV) { 33964055dee7STejun Heo if (!ign_dev_err) 33974055dee7STejun Heo goto fail; 33984055dee7STejun Heo else 33994055dee7STejun Heo dev_err_whine = " (device error ignored)"; 34004055dee7STejun Heo } 34014055dee7STejun Heo 3402c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 3403c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 3404c6fd2807SJeff Garzik 34054055dee7STejun Heo ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", 34064055dee7STejun Heo ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 34074055dee7STejun Heo dev_err_whine); 34084055dee7STejun Heo 3409c6fd2807SJeff Garzik return 0; 34104055dee7STejun Heo 34114055dee7STejun Heo fail: 34124055dee7STejun Heo ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 34134055dee7STejun Heo "(err_mask=0x%x)\n", err_mask); 34144055dee7STejun Heo return -EIO; 3415c6fd2807SJeff Garzik } 3416c6fd2807SJeff Garzik 3417c6fd2807SJeff Garzik /** 341804351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 34190260731fSTejun Heo * @link: link on which timings will be programmed 34201967b7ffSJoe Perches * @r_failed_dev: out parameter for failed device 3421c6fd2807SJeff Garzik * 342204351821SAlan * Standard implementation of the function used to tune and set 342304351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 342404351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 3425c6fd2807SJeff Garzik * returned in @r_failed_dev. 3426c6fd2807SJeff Garzik * 3427c6fd2807SJeff Garzik * LOCKING: 3428c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3429c6fd2807SJeff Garzik * 3430c6fd2807SJeff Garzik * RETURNS: 3431c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3432c6fd2807SJeff Garzik */ 343304351821SAlan 34340260731fSTejun Heo int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3435c6fd2807SJeff Garzik { 34360260731fSTejun Heo struct ata_port *ap = link->ap; 3437c6fd2807SJeff Garzik struct ata_device *dev; 3438f58229f8STejun Heo int rc = 0, used_dma = 0, found = 0; 3439c6fd2807SJeff Garzik 3440c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 34411eca4365STejun Heo ata_for_each_dev(dev, link, ENABLED) { 34427dc951aeSTejun Heo unsigned long pio_mask, dma_mask; 3443b3a70601SAlan Cox unsigned int mode_mask; 3444c6fd2807SJeff Garzik 3445b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATA; 3446b3a70601SAlan Cox if (dev->class == ATA_DEV_ATAPI) 3447b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATAPI; 3448b3a70601SAlan Cox else if (ata_id_is_cfa(dev->id)) 3449b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_CFA; 3450b3a70601SAlan Cox 3451c6fd2807SJeff Garzik ata_dev_xfermask(dev); 345233267325STejun Heo ata_force_xfermask(dev); 3453c6fd2807SJeff Garzik 3454c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3455c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 3456b3a70601SAlan Cox 3457b3a70601SAlan Cox if (libata_dma_mask & mode_mask) 3458b3a70601SAlan Cox dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 3459b3a70601SAlan Cox else 3460b3a70601SAlan Cox dma_mask = 0; 3461b3a70601SAlan Cox 3462c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3463c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3464c6fd2807SJeff Garzik 3465c6fd2807SJeff Garzik found = 1; 3466b15b3ebaSAlan Cox if (ata_dma_enabled(dev)) 3467c6fd2807SJeff Garzik used_dma = 1; 3468c6fd2807SJeff Garzik } 3469c6fd2807SJeff Garzik if (!found) 3470c6fd2807SJeff Garzik goto out; 3471c6fd2807SJeff Garzik 3472c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 34731eca4365STejun Heo ata_for_each_dev(dev, link, ENABLED) { 347470cd071eSTejun Heo if (dev->pio_mode == 0xff) { 3475c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 3476c6fd2807SJeff Garzik rc = -EINVAL; 3477c6fd2807SJeff Garzik goto out; 3478c6fd2807SJeff Garzik } 3479c6fd2807SJeff Garzik 3480c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 3481c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 3482c6fd2807SJeff Garzik if (ap->ops->set_piomode) 3483c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 3484c6fd2807SJeff Garzik } 3485c6fd2807SJeff Garzik 3486c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 34871eca4365STejun Heo ata_for_each_dev(dev, link, ENABLED) { 34881eca4365STejun Heo if (!ata_dma_enabled(dev)) 3489c6fd2807SJeff Garzik continue; 3490c6fd2807SJeff Garzik 3491c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 3492c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3493c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 3494c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 3495c6fd2807SJeff Garzik } 3496c6fd2807SJeff Garzik 3497c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 34981eca4365STejun Heo ata_for_each_dev(dev, link, ENABLED) { 3499c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 3500c6fd2807SJeff Garzik if (rc) 3501c6fd2807SJeff Garzik goto out; 3502c6fd2807SJeff Garzik } 3503c6fd2807SJeff Garzik 3504c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 3505c6fd2807SJeff Garzik * host channels are not permitted to do so. 3506c6fd2807SJeff Garzik */ 3507cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3508032af1ceSAlan ap->host->simplex_claimed = ap; 3509c6fd2807SJeff Garzik 3510c6fd2807SJeff Garzik out: 3511c6fd2807SJeff Garzik if (rc) 3512c6fd2807SJeff Garzik *r_failed_dev = dev; 3513c6fd2807SJeff Garzik return rc; 3514c6fd2807SJeff Garzik } 3515c6fd2807SJeff Garzik 3516c6fd2807SJeff Garzik /** 3517aa2731adSTejun Heo * ata_wait_ready - wait for link to become ready 3518aa2731adSTejun Heo * @link: link to be waited on 3519aa2731adSTejun Heo * @deadline: deadline jiffies for the operation 3520aa2731adSTejun Heo * @check_ready: callback to check link readiness 3521aa2731adSTejun Heo * 3522aa2731adSTejun Heo * Wait for @link to become ready. @check_ready should return 3523aa2731adSTejun Heo * positive number if @link is ready, 0 if it isn't, -ENODEV if 3524aa2731adSTejun Heo * link doesn't seem to be occupied, other errno for other error 3525aa2731adSTejun Heo * conditions. 3526aa2731adSTejun Heo * 3527aa2731adSTejun Heo * Transient -ENODEV conditions are allowed for 3528aa2731adSTejun Heo * ATA_TMOUT_FF_WAIT. 3529aa2731adSTejun Heo * 3530aa2731adSTejun Heo * LOCKING: 3531aa2731adSTejun Heo * EH context. 3532aa2731adSTejun Heo * 3533aa2731adSTejun Heo * RETURNS: 3534aa2731adSTejun Heo * 0 if @linke is ready before @deadline; otherwise, -errno. 3535aa2731adSTejun Heo */ 3536aa2731adSTejun Heo int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3537aa2731adSTejun Heo int (*check_ready)(struct ata_link *link)) 3538aa2731adSTejun Heo { 3539aa2731adSTejun Heo unsigned long start = jiffies; 3540b48d58f5STejun Heo unsigned long nodev_deadline; 3541aa2731adSTejun Heo int warned = 0; 3542aa2731adSTejun Heo 3543b48d58f5STejun Heo /* choose which 0xff timeout to use, read comment in libata.h */ 3544b48d58f5STejun Heo if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) 3545b48d58f5STejun Heo nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); 3546b48d58f5STejun Heo else 3547b48d58f5STejun Heo nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3548b48d58f5STejun Heo 3549b1c72916STejun Heo /* Slave readiness can't be tested separately from master. On 3550b1c72916STejun Heo * M/S emulation configuration, this function should be called 3551b1c72916STejun Heo * only on the master and it will handle both master and slave. 3552b1c72916STejun Heo */ 3553b1c72916STejun Heo WARN_ON(link == link->ap->slave_link); 3554b1c72916STejun Heo 3555aa2731adSTejun Heo if (time_after(nodev_deadline, deadline)) 3556aa2731adSTejun Heo nodev_deadline = deadline; 3557aa2731adSTejun Heo 3558aa2731adSTejun Heo while (1) { 3559aa2731adSTejun Heo unsigned long now = jiffies; 3560aa2731adSTejun Heo int ready, tmp; 3561aa2731adSTejun Heo 3562aa2731adSTejun Heo ready = tmp = check_ready(link); 3563aa2731adSTejun Heo if (ready > 0) 3564aa2731adSTejun Heo return 0; 3565aa2731adSTejun Heo 3566b48d58f5STejun Heo /* 3567b48d58f5STejun Heo * -ENODEV could be transient. Ignore -ENODEV if link 3568aa2731adSTejun Heo * is online. Also, some SATA devices take a long 3569b48d58f5STejun Heo * time to clear 0xff after reset. Wait for 3570b48d58f5STejun Heo * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't 3571b48d58f5STejun Heo * offline. 3572aa2731adSTejun Heo * 3573aa2731adSTejun Heo * Note that some PATA controllers (pata_ali) explode 3574aa2731adSTejun Heo * if status register is read more than once when 3575aa2731adSTejun Heo * there's no device attached. 3576aa2731adSTejun Heo */ 3577aa2731adSTejun Heo if (ready == -ENODEV) { 3578aa2731adSTejun Heo if (ata_link_online(link)) 3579aa2731adSTejun Heo ready = 0; 3580aa2731adSTejun Heo else if ((link->ap->flags & ATA_FLAG_SATA) && 3581aa2731adSTejun Heo !ata_link_offline(link) && 3582aa2731adSTejun Heo time_before(now, nodev_deadline)) 3583aa2731adSTejun Heo ready = 0; 3584aa2731adSTejun Heo } 3585aa2731adSTejun Heo 3586aa2731adSTejun Heo if (ready) 3587aa2731adSTejun Heo return ready; 3588aa2731adSTejun Heo if (time_after(now, deadline)) 3589aa2731adSTejun Heo return -EBUSY; 3590aa2731adSTejun Heo 3591aa2731adSTejun Heo if (!warned && time_after(now, start + 5 * HZ) && 3592aa2731adSTejun Heo (deadline - now > 3 * HZ)) { 3593aa2731adSTejun Heo ata_link_printk(link, KERN_WARNING, 3594aa2731adSTejun Heo "link is slow to respond, please be patient " 3595aa2731adSTejun Heo "(ready=%d)\n", tmp); 3596aa2731adSTejun Heo warned = 1; 3597aa2731adSTejun Heo } 3598aa2731adSTejun Heo 3599aa2731adSTejun Heo msleep(50); 3600aa2731adSTejun Heo } 3601aa2731adSTejun Heo } 3602aa2731adSTejun Heo 3603aa2731adSTejun Heo /** 3604aa2731adSTejun Heo * ata_wait_after_reset - wait for link to become ready after reset 3605aa2731adSTejun Heo * @link: link to be waited on 3606aa2731adSTejun Heo * @deadline: deadline jiffies for the operation 3607aa2731adSTejun Heo * @check_ready: callback to check link readiness 3608aa2731adSTejun Heo * 3609aa2731adSTejun Heo * Wait for @link to become ready after reset. 3610aa2731adSTejun Heo * 3611aa2731adSTejun Heo * LOCKING: 3612aa2731adSTejun Heo * EH context. 3613aa2731adSTejun Heo * 3614aa2731adSTejun Heo * RETURNS: 3615aa2731adSTejun Heo * 0 if @linke is ready before @deadline; otherwise, -errno. 3616aa2731adSTejun Heo */ 36172b4221bbSHarvey Harrison int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3618aa2731adSTejun Heo int (*check_ready)(struct ata_link *link)) 3619aa2731adSTejun Heo { 3620341c2c95STejun Heo msleep(ATA_WAIT_AFTER_RESET); 3621aa2731adSTejun Heo 3622aa2731adSTejun Heo return ata_wait_ready(link, deadline, check_ready); 3623aa2731adSTejun Heo } 3624aa2731adSTejun Heo 3625aa2731adSTejun Heo /** 3626936fd732STejun Heo * sata_link_debounce - debounce SATA phy status 3627936fd732STejun Heo * @link: ATA link to debounce SATA phy status for 3628c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3629d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3630c6fd2807SJeff Garzik * 3631936fd732STejun Heo * Make sure SStatus of @link reaches stable state, determined by 3632c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3633c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3634d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3635d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3636c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3637c6fd2807SJeff Garzik * 3638d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3639d4b2bab4STejun Heo * two is used. 3640d4b2bab4STejun Heo * 3641c6fd2807SJeff Garzik * LOCKING: 3642c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3643c6fd2807SJeff Garzik * 3644c6fd2807SJeff Garzik * RETURNS: 3645c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3646c6fd2807SJeff Garzik */ 3647936fd732STejun Heo int sata_link_debounce(struct ata_link *link, const unsigned long *params, 3648d4b2bab4STejun Heo unsigned long deadline) 3649c6fd2807SJeff Garzik { 3650341c2c95STejun Heo unsigned long interval = params[0]; 3651341c2c95STejun Heo unsigned long duration = params[1]; 3652d4b2bab4STejun Heo unsigned long last_jiffies, t; 3653c6fd2807SJeff Garzik u32 last, cur; 3654c6fd2807SJeff Garzik int rc; 3655c6fd2807SJeff Garzik 3656341c2c95STejun Heo t = ata_deadline(jiffies, params[2]); 3657d4b2bab4STejun Heo if (time_before(t, deadline)) 3658d4b2bab4STejun Heo deadline = t; 3659d4b2bab4STejun Heo 3660936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3661c6fd2807SJeff Garzik return rc; 3662c6fd2807SJeff Garzik cur &= 0xf; 3663c6fd2807SJeff Garzik 3664c6fd2807SJeff Garzik last = cur; 3665c6fd2807SJeff Garzik last_jiffies = jiffies; 3666c6fd2807SJeff Garzik 3667c6fd2807SJeff Garzik while (1) { 3668341c2c95STejun Heo msleep(interval); 3669936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3670c6fd2807SJeff Garzik return rc; 3671c6fd2807SJeff Garzik cur &= 0xf; 3672c6fd2807SJeff Garzik 3673c6fd2807SJeff Garzik /* DET stable? */ 3674c6fd2807SJeff Garzik if (cur == last) { 3675d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3676c6fd2807SJeff Garzik continue; 3677341c2c95STejun Heo if (time_after(jiffies, 3678341c2c95STejun Heo ata_deadline(last_jiffies, duration))) 3679c6fd2807SJeff Garzik return 0; 3680c6fd2807SJeff Garzik continue; 3681c6fd2807SJeff Garzik } 3682c6fd2807SJeff Garzik 3683c6fd2807SJeff Garzik /* unstable, start over */ 3684c6fd2807SJeff Garzik last = cur; 3685c6fd2807SJeff Garzik last_jiffies = jiffies; 3686c6fd2807SJeff Garzik 3687f1545154STejun Heo /* Check deadline. If debouncing failed, return 3688f1545154STejun Heo * -EPIPE to tell upper layer to lower link speed. 3689f1545154STejun Heo */ 3690d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3691f1545154STejun Heo return -EPIPE; 3692c6fd2807SJeff Garzik } 3693c6fd2807SJeff Garzik } 3694c6fd2807SJeff Garzik 3695c6fd2807SJeff Garzik /** 3696936fd732STejun Heo * sata_link_resume - resume SATA link 3697936fd732STejun Heo * @link: ATA link to resume SATA 3698c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3699d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3700c6fd2807SJeff Garzik * 3701936fd732STejun Heo * Resume SATA phy @link and debounce it. 3702c6fd2807SJeff Garzik * 3703c6fd2807SJeff Garzik * LOCKING: 3704c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3705c6fd2807SJeff Garzik * 3706c6fd2807SJeff Garzik * RETURNS: 3707c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3708c6fd2807SJeff Garzik */ 3709936fd732STejun Heo int sata_link_resume(struct ata_link *link, const unsigned long *params, 3710d4b2bab4STejun Heo unsigned long deadline) 3711c6fd2807SJeff Garzik { 37125040ab67STejun Heo int tries = ATA_LINK_RESUME_TRIES; 3713ac371987STejun Heo u32 scontrol, serror; 3714c6fd2807SJeff Garzik int rc; 3715c6fd2807SJeff Garzik 3716936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3717c6fd2807SJeff Garzik return rc; 3718c6fd2807SJeff Garzik 37195040ab67STejun Heo /* 37205040ab67STejun Heo * Writes to SControl sometimes get ignored under certain 37215040ab67STejun Heo * controllers (ata_piix SIDPR). Make sure DET actually is 37225040ab67STejun Heo * cleared. 37235040ab67STejun Heo */ 37245040ab67STejun Heo do { 3725c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3726936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3727c6fd2807SJeff Garzik return rc; 37285040ab67STejun Heo /* 37295040ab67STejun Heo * Some PHYs react badly if SStatus is pounded 37305040ab67STejun Heo * immediately after resuming. Delay 200ms before 37315040ab67STejun Heo * debouncing. 3732c6fd2807SJeff Garzik */ 3733c6fd2807SJeff Garzik msleep(200); 3734c6fd2807SJeff Garzik 37355040ab67STejun Heo /* is SControl restored correctly? */ 37365040ab67STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 37375040ab67STejun Heo return rc; 37385040ab67STejun Heo } while ((scontrol & 0xf0f) != 0x300 && --tries); 37395040ab67STejun Heo 37405040ab67STejun Heo if ((scontrol & 0xf0f) != 0x300) { 37415040ab67STejun Heo ata_link_printk(link, KERN_ERR, 37425040ab67STejun Heo "failed to resume link (SControl %X)\n", 37435040ab67STejun Heo scontrol); 37445040ab67STejun Heo return 0; 37455040ab67STejun Heo } 37465040ab67STejun Heo 37475040ab67STejun Heo if (tries < ATA_LINK_RESUME_TRIES) 37485040ab67STejun Heo ata_link_printk(link, KERN_WARNING, 37495040ab67STejun Heo "link resume succeeded after %d retries\n", 37505040ab67STejun Heo ATA_LINK_RESUME_TRIES - tries); 37515040ab67STejun Heo 3752ac371987STejun Heo if ((rc = sata_link_debounce(link, params, deadline))) 3753ac371987STejun Heo return rc; 3754ac371987STejun Heo 3755f046519fSTejun Heo /* clear SError, some PHYs require this even for SRST to work */ 3756ac371987STejun Heo if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) 3757ac371987STejun Heo rc = sata_scr_write(link, SCR_ERROR, serror); 3758ac371987STejun Heo 3759f046519fSTejun Heo return rc != -EINVAL ? rc : 0; 3760c6fd2807SJeff Garzik } 3761c6fd2807SJeff Garzik 3762c6fd2807SJeff Garzik /** 37630aa1113dSTejun Heo * ata_std_prereset - prepare for reset 3764cc0680a5STejun Heo * @link: ATA link to be reset 3765d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3766c6fd2807SJeff Garzik * 3767cc0680a5STejun Heo * @link is about to be reset. Initialize it. Failure from 3768b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3769b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3770b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3771b8cffc6aSTejun Heo * should just whine, not fail. 3772c6fd2807SJeff Garzik * 3773c6fd2807SJeff Garzik * LOCKING: 3774c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3775c6fd2807SJeff Garzik * 3776c6fd2807SJeff Garzik * RETURNS: 3777c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3778c6fd2807SJeff Garzik */ 37790aa1113dSTejun Heo int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3780c6fd2807SJeff Garzik { 3781cc0680a5STejun Heo struct ata_port *ap = link->ap; 3782936fd732STejun Heo struct ata_eh_context *ehc = &link->eh_context; 3783c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3784c6fd2807SJeff Garzik int rc; 3785c6fd2807SJeff Garzik 3786c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3787c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3788c6fd2807SJeff Garzik return 0; 3789c6fd2807SJeff Garzik 3790936fd732STejun Heo /* if SATA, resume link */ 3791a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3792936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 3793b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3794b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3795cc0680a5STejun Heo ata_link_printk(link, KERN_WARNING, "failed to resume " 3796c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3797c6fd2807SJeff Garzik } 3798c6fd2807SJeff Garzik 379945db2f6cSTejun Heo /* no point in trying softreset on offline link */ 3800b1c72916STejun Heo if (ata_phys_link_offline(link)) 380145db2f6cSTejun Heo ehc->i.action &= ~ATA_EH_SOFTRESET; 380245db2f6cSTejun Heo 3803c6fd2807SJeff Garzik return 0; 3804c6fd2807SJeff Garzik } 3805c6fd2807SJeff Garzik 3806c6fd2807SJeff Garzik /** 3807cc0680a5STejun Heo * sata_link_hardreset - reset link via SATA phy reset 3808cc0680a5STejun Heo * @link: link to reset 3809b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3810d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 38119dadd45bSTejun Heo * @online: optional out parameter indicating link onlineness 38129dadd45bSTejun Heo * @check_ready: optional callback to check link readiness 3813c6fd2807SJeff Garzik * 3814cc0680a5STejun Heo * SATA phy-reset @link using DET bits of SControl register. 38159dadd45bSTejun Heo * After hardreset, link readiness is waited upon using 38169dadd45bSTejun Heo * ata_wait_ready() if @check_ready is specified. LLDs are 38179dadd45bSTejun Heo * allowed to not specify @check_ready and wait itself after this 38189dadd45bSTejun Heo * function returns. Device classification is LLD's 38199dadd45bSTejun Heo * responsibility. 38209dadd45bSTejun Heo * 38219dadd45bSTejun Heo * *@online is set to one iff reset succeeded and @link is online 38229dadd45bSTejun Heo * after reset. 3823c6fd2807SJeff Garzik * 3824c6fd2807SJeff Garzik * LOCKING: 3825c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3826c6fd2807SJeff Garzik * 3827c6fd2807SJeff Garzik * RETURNS: 3828c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3829c6fd2807SJeff Garzik */ 3830cc0680a5STejun Heo int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, 38319dadd45bSTejun Heo unsigned long deadline, 38329dadd45bSTejun Heo bool *online, int (*check_ready)(struct ata_link *)) 3833c6fd2807SJeff Garzik { 3834c6fd2807SJeff Garzik u32 scontrol; 3835c6fd2807SJeff Garzik int rc; 3836c6fd2807SJeff Garzik 3837c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3838c6fd2807SJeff Garzik 38399dadd45bSTejun Heo if (online) 38409dadd45bSTejun Heo *online = false; 38419dadd45bSTejun Heo 3842936fd732STejun Heo if (sata_set_spd_needed(link)) { 3843c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3844c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3845c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3846c6fd2807SJeff Garzik * and Sil3124. 3847c6fd2807SJeff Garzik */ 3848936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3849b6103f6dSTejun Heo goto out; 3850c6fd2807SJeff Garzik 3851cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3852c6fd2807SJeff Garzik 3853936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3854b6103f6dSTejun Heo goto out; 3855c6fd2807SJeff Garzik 3856936fd732STejun Heo sata_set_spd(link); 3857c6fd2807SJeff Garzik } 3858c6fd2807SJeff Garzik 3859c6fd2807SJeff Garzik /* issue phy wake/reset */ 3860936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3861b6103f6dSTejun Heo goto out; 3862c6fd2807SJeff Garzik 3863c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3864c6fd2807SJeff Garzik 3865936fd732STejun Heo if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) 3866b6103f6dSTejun Heo goto out; 3867c6fd2807SJeff Garzik 3868c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3869c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3870c6fd2807SJeff Garzik */ 3871c6fd2807SJeff Garzik msleep(1); 3872c6fd2807SJeff Garzik 3873936fd732STejun Heo /* bring link back */ 3874936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 38759dadd45bSTejun Heo if (rc) 38769dadd45bSTejun Heo goto out; 38779dadd45bSTejun Heo /* if link is offline nothing more to do */ 3878b1c72916STejun Heo if (ata_phys_link_offline(link)) 38799dadd45bSTejun Heo goto out; 38809dadd45bSTejun Heo 38819dadd45bSTejun Heo /* Link is online. From this point, -ENODEV too is an error. */ 38829dadd45bSTejun Heo if (online) 38839dadd45bSTejun Heo *online = true; 38849dadd45bSTejun Heo 3885071f44b1STejun Heo if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { 38869dadd45bSTejun Heo /* If PMP is supported, we have to do follow-up SRST. 38879dadd45bSTejun Heo * Some PMPs don't send D2H Reg FIS after hardreset if 38889dadd45bSTejun Heo * the first port is empty. Wait only for 38899dadd45bSTejun Heo * ATA_TMOUT_PMP_SRST_WAIT. 38909dadd45bSTejun Heo */ 38919dadd45bSTejun Heo if (check_ready) { 38929dadd45bSTejun Heo unsigned long pmp_deadline; 38939dadd45bSTejun Heo 3894341c2c95STejun Heo pmp_deadline = ata_deadline(jiffies, 3895341c2c95STejun Heo ATA_TMOUT_PMP_SRST_WAIT); 38969dadd45bSTejun Heo if (time_after(pmp_deadline, deadline)) 38979dadd45bSTejun Heo pmp_deadline = deadline; 38989dadd45bSTejun Heo ata_wait_ready(link, pmp_deadline, check_ready); 38999dadd45bSTejun Heo } 39009dadd45bSTejun Heo rc = -EAGAIN; 39019dadd45bSTejun Heo goto out; 39029dadd45bSTejun Heo } 39039dadd45bSTejun Heo 39049dadd45bSTejun Heo rc = 0; 39059dadd45bSTejun Heo if (check_ready) 39069dadd45bSTejun Heo rc = ata_wait_ready(link, deadline, check_ready); 3907b6103f6dSTejun Heo out: 39080cbf0711STejun Heo if (rc && rc != -EAGAIN) { 39090cbf0711STejun Heo /* online is set iff link is online && reset succeeded */ 39100cbf0711STejun Heo if (online) 39110cbf0711STejun Heo *online = false; 39129dadd45bSTejun Heo ata_link_printk(link, KERN_ERR, 39139dadd45bSTejun Heo "COMRESET failed (errno=%d)\n", rc); 39140cbf0711STejun Heo } 3915b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3916b6103f6dSTejun Heo return rc; 3917b6103f6dSTejun Heo } 3918b6103f6dSTejun Heo 3919b6103f6dSTejun Heo /** 392057c9efdfSTejun Heo * sata_std_hardreset - COMRESET w/o waiting or classification 392157c9efdfSTejun Heo * @link: link to reset 392257c9efdfSTejun Heo * @class: resulting class of attached device 392357c9efdfSTejun Heo * @deadline: deadline jiffies for the operation 392457c9efdfSTejun Heo * 392557c9efdfSTejun Heo * Standard SATA COMRESET w/o waiting or classification. 392657c9efdfSTejun Heo * 392757c9efdfSTejun Heo * LOCKING: 392857c9efdfSTejun Heo * Kernel thread context (may sleep) 392957c9efdfSTejun Heo * 393057c9efdfSTejun Heo * RETURNS: 393157c9efdfSTejun Heo * 0 if link offline, -EAGAIN if link online, -errno on errors. 393257c9efdfSTejun Heo */ 393357c9efdfSTejun Heo int sata_std_hardreset(struct ata_link *link, unsigned int *class, 393457c9efdfSTejun Heo unsigned long deadline) 393557c9efdfSTejun Heo { 393657c9efdfSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 393757c9efdfSTejun Heo bool online; 393857c9efdfSTejun Heo int rc; 393957c9efdfSTejun Heo 394057c9efdfSTejun Heo /* do hardreset */ 394157c9efdfSTejun Heo rc = sata_link_hardreset(link, timing, deadline, &online, NULL); 394257c9efdfSTejun Heo return online ? -EAGAIN : rc; 394357c9efdfSTejun Heo } 394457c9efdfSTejun Heo 394557c9efdfSTejun Heo /** 3946203c75b8STejun Heo * ata_std_postreset - standard postreset callback 3947cc0680a5STejun Heo * @link: the target ata_link 3948c6fd2807SJeff Garzik * @classes: classes of attached devices 3949c6fd2807SJeff Garzik * 3950c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3951c6fd2807SJeff Garzik * the device might have been reset more than once using 3952c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3953c6fd2807SJeff Garzik * 3954c6fd2807SJeff Garzik * LOCKING: 3955c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3956c6fd2807SJeff Garzik */ 3957203c75b8STejun Heo void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3958c6fd2807SJeff Garzik { 3959f046519fSTejun Heo u32 serror; 3960f046519fSTejun Heo 3961c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3962c6fd2807SJeff Garzik 3963f046519fSTejun Heo /* reset complete, clear SError */ 3964f046519fSTejun Heo if (!sata_scr_read(link, SCR_ERROR, &serror)) 3965f046519fSTejun Heo sata_scr_write(link, SCR_ERROR, serror); 3966f046519fSTejun Heo 3967c6fd2807SJeff Garzik /* print link status */ 3968936fd732STejun Heo sata_print_link_status(link); 3969c6fd2807SJeff Garzik 3970c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3971c6fd2807SJeff Garzik } 3972c6fd2807SJeff Garzik 3973c6fd2807SJeff Garzik /** 3974c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3975c6fd2807SJeff Garzik * @dev: device to compare against 3976c6fd2807SJeff Garzik * @new_class: class of the new device 3977c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3978c6fd2807SJeff Garzik * 3979c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3980c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3981c6fd2807SJeff Garzik * @new_id. 3982c6fd2807SJeff Garzik * 3983c6fd2807SJeff Garzik * LOCKING: 3984c6fd2807SJeff Garzik * None. 3985c6fd2807SJeff Garzik * 3986c6fd2807SJeff Garzik * RETURNS: 3987c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3988c6fd2807SJeff Garzik */ 3989c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3990c6fd2807SJeff Garzik const u16 *new_id) 3991c6fd2807SJeff Garzik { 3992c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3993a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3994a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3995c6fd2807SJeff Garzik 3996c6fd2807SJeff Garzik if (dev->class != new_class) { 3997c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3998c6fd2807SJeff Garzik dev->class, new_class); 3999c6fd2807SJeff Garzik return 0; 4000c6fd2807SJeff Garzik } 4001c6fd2807SJeff Garzik 4002a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 4003a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 4004a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 4005a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 4006c6fd2807SJeff Garzik 4007c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 4008c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 4009c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 4010c6fd2807SJeff Garzik return 0; 4011c6fd2807SJeff Garzik } 4012c6fd2807SJeff Garzik 4013c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 4014c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 4015c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 4016c6fd2807SJeff Garzik return 0; 4017c6fd2807SJeff Garzik } 4018c6fd2807SJeff Garzik 4019c6fd2807SJeff Garzik return 1; 4020c6fd2807SJeff Garzik } 4021c6fd2807SJeff Garzik 4022c6fd2807SJeff Garzik /** 4023fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 40243fae450cSHenrik Kretzschmar * @dev: target ATA device 4025bff04647STejun Heo * @readid_flags: read ID flags 4026c6fd2807SJeff Garzik * 4027c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 4028c6fd2807SJeff Garzik * the port. 4029c6fd2807SJeff Garzik * 4030c6fd2807SJeff Garzik * LOCKING: 4031c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4032c6fd2807SJeff Garzik * 4033c6fd2807SJeff Garzik * RETURNS: 4034c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 4035c6fd2807SJeff Garzik */ 4036fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 4037c6fd2807SJeff Garzik { 4038c6fd2807SJeff Garzik unsigned int class = dev->class; 40399af5c9c9STejun Heo u16 *id = (void *)dev->link->ap->sector_buf; 4040c6fd2807SJeff Garzik int rc; 4041c6fd2807SJeff Garzik 4042c6fd2807SJeff Garzik /* read ID data */ 4043bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 4044c6fd2807SJeff Garzik if (rc) 4045fe30911bSTejun Heo return rc; 4046c6fd2807SJeff Garzik 4047c6fd2807SJeff Garzik /* is the device still there? */ 4048fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 4049fe30911bSTejun Heo return -ENODEV; 4050c6fd2807SJeff Garzik 4051c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 4052fe30911bSTejun Heo return 0; 4053fe30911bSTejun Heo } 4054fe30911bSTejun Heo 4055fe30911bSTejun Heo /** 4056fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 4057fe30911bSTejun Heo * @dev: device to revalidate 4058422c9daaSTejun Heo * @new_class: new class code 4059fe30911bSTejun Heo * @readid_flags: read ID flags 4060fe30911bSTejun Heo * 4061fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 4062fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 4063fe30911bSTejun Heo * 4064fe30911bSTejun Heo * LOCKING: 4065fe30911bSTejun Heo * Kernel thread context (may sleep) 4066fe30911bSTejun Heo * 4067fe30911bSTejun Heo * RETURNS: 4068fe30911bSTejun Heo * 0 on success, negative errno otherwise 4069fe30911bSTejun Heo */ 4070422c9daaSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 4071422c9daaSTejun Heo unsigned int readid_flags) 4072fe30911bSTejun Heo { 40736ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 40745920dadfSTejun Heo u64 n_native_sectors = dev->n_native_sectors; 4075fe30911bSTejun Heo int rc; 4076fe30911bSTejun Heo 4077fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 4078fe30911bSTejun Heo return -ENODEV; 4079fe30911bSTejun Heo 4080422c9daaSTejun Heo /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 4081422c9daaSTejun Heo if (ata_class_enabled(new_class) && 4082f0d0613dSBorislav Petkov new_class != ATA_DEV_ATA && 4083f0d0613dSBorislav Petkov new_class != ATA_DEV_ATAPI && 4084f0d0613dSBorislav Petkov new_class != ATA_DEV_SEMB) { 4085422c9daaSTejun Heo ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", 4086422c9daaSTejun Heo dev->class, new_class); 4087422c9daaSTejun Heo rc = -ENODEV; 4088422c9daaSTejun Heo goto fail; 4089422c9daaSTejun Heo } 4090422c9daaSTejun Heo 4091fe30911bSTejun Heo /* re-read ID */ 4092fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 4093fe30911bSTejun Heo if (rc) 4094fe30911bSTejun Heo goto fail; 4095c6fd2807SJeff Garzik 4096c6fd2807SJeff Garzik /* configure device according to the new ID */ 4097efdaedc4STejun Heo rc = ata_dev_configure(dev); 40986ddcd3b0STejun Heo if (rc) 40996ddcd3b0STejun Heo goto fail; 41006ddcd3b0STejun Heo 41016ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 4102445d211bSTejun Heo if (dev->class != ATA_DEV_ATA || !n_sectors || 4103445d211bSTejun Heo dev->n_sectors == n_sectors) 4104445d211bSTejun Heo return 0; 4105445d211bSTejun Heo 4106445d211bSTejun Heo /* n_sectors has changed */ 4107445d211bSTejun Heo ata_dev_printk(dev, KERN_WARNING, "n_sectors mismatch %llu != %llu\n", 41086ddcd3b0STejun Heo (unsigned long long)n_sectors, 41096ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 4110445d211bSTejun Heo 41115920dadfSTejun Heo /* 41125920dadfSTejun Heo * Something could have caused HPA to be unlocked 4113445d211bSTejun Heo * involuntarily. If n_native_sectors hasn't changed and the 4114445d211bSTejun Heo * new size matches it, keep the device. 41155920dadfSTejun Heo */ 41165920dadfSTejun Heo if (dev->n_native_sectors == n_native_sectors && 4117445d211bSTejun Heo dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { 41185920dadfSTejun Heo ata_dev_printk(dev, KERN_WARNING, 41195920dadfSTejun Heo "new n_sectors matches native, probably " 412068939ce5STejun Heo "late HPA unlock, n_sectors updated\n"); 412168939ce5STejun Heo /* use the larger n_sectors */ 4122445d211bSTejun Heo return 0; 4123445d211bSTejun Heo } 4124445d211bSTejun Heo 4125445d211bSTejun Heo /* 4126445d211bSTejun Heo * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try 4127445d211bSTejun Heo * unlocking HPA in those cases. 4128445d211bSTejun Heo * 4129445d211bSTejun Heo * https://bugzilla.kernel.org/show_bug.cgi?id=15396 4130445d211bSTejun Heo */ 4131445d211bSTejun Heo if (dev->n_native_sectors == n_native_sectors && 4132445d211bSTejun Heo dev->n_sectors < n_sectors && n_sectors == n_native_sectors && 4133445d211bSTejun Heo !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) { 4134445d211bSTejun Heo ata_dev_printk(dev, KERN_WARNING, 4135445d211bSTejun Heo "old n_sectors matches native, probably " 4136445d211bSTejun Heo "late HPA lock, will try to unlock HPA\n"); 4137445d211bSTejun Heo /* try unlocking HPA */ 4138445d211bSTejun Heo dev->flags |= ATA_DFLAG_UNLOCK_HPA; 4139445d211bSTejun Heo rc = -EIO; 4140445d211bSTejun Heo } else 4141445d211bSTejun Heo rc = -ENODEV; 4142445d211bSTejun Heo 4143445d211bSTejun Heo /* restore original n_[native_]sectors and fail */ 41445920dadfSTejun Heo dev->n_native_sectors = n_native_sectors; 41455920dadfSTejun Heo dev->n_sectors = n_sectors; 4146c6fd2807SJeff Garzik fail: 4147c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 4148c6fd2807SJeff Garzik return rc; 4149c6fd2807SJeff Garzik } 4150c6fd2807SJeff Garzik 41516919a0a6SAlan Cox struct ata_blacklist_entry { 41526919a0a6SAlan Cox const char *model_num; 41536919a0a6SAlan Cox const char *model_rev; 41546919a0a6SAlan Cox unsigned long horkage; 41556919a0a6SAlan Cox }; 41566919a0a6SAlan Cox 41576919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 41586919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 41596919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 41606919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 41616919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 41626919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 41636919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 41646919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 41656919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 41666919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 41676919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 41687da4c935SMark Lord { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA }, 41696919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 41706919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 41716919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 41726919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 41736919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 41747da4c935SMark Lord { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA }, 41756919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 41766919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 41776919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 41786919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 41796919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 41806919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 41816919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 41826919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 41836919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 41846919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 41856919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, 418639f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 41873af9a77aSTejun Heo /* Odd clown on sil3726/4726 PMPs */ 418850af2fa1STejun Heo { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, 41896919a0a6SAlan Cox 419018d6e9d5SAlbert Lee /* Weird ATAPI devices */ 419140a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 41926a87e42eSTejun Heo { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, 419318d6e9d5SAlbert Lee 41946919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 41956919a0a6SAlan Cox 41966919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 41976919a0a6SAlan Cox /* NCQ is slow */ 41986919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 4199459ad688STejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 420009125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 420109125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 42027acfaf30SPaul Rolland /* NCQ is broken */ 4203539cc7c7SJeff Garzik { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, 42040e3dbc01SAlan Cox { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, 4205da6f0ec2SPaolo Ornati { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, 4206e41bd3e8STejun Heo { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, 42075ccfca97SLubomir Bulej { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, 4208539cc7c7SJeff Garzik 4209ac70a964STejun Heo /* Seagate NCQ + FLUSH CACHE firmware bug */ 42104d1f9082SMark Lord { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4211ac70a964STejun Heo ATA_HORKAGE_FIRMWARE_WARN }, 4212d10d491fSTejun Heo 42134d1f9082SMark Lord { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4214d10d491fSTejun Heo ATA_HORKAGE_FIRMWARE_WARN }, 4215d10d491fSTejun Heo 42164d1f9082SMark Lord { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4217d10d491fSTejun Heo ATA_HORKAGE_FIRMWARE_WARN }, 4218d10d491fSTejun Heo 42194d1f9082SMark Lord { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4220ac70a964STejun Heo ATA_HORKAGE_FIRMWARE_WARN }, 4221ac70a964STejun Heo 422236e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 422336e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 422436e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 422536e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 422636e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 42276919a0a6SAlan Cox 422868b0ddb2STejun Heo /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ 422968b0ddb2STejun Heo { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, }, 423068b0ddb2STejun Heo 423116c55b03STejun Heo /* devices which puke on READ_NATIVE_MAX */ 423216c55b03STejun Heo { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, 423316c55b03STejun Heo { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, 423416c55b03STejun Heo { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, 423516c55b03STejun Heo { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, 42366919a0a6SAlan Cox 42377831387bSTejun Heo /* this one allows HPA unlocking but fails IOs on the area */ 42387831387bSTejun Heo { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, 42397831387bSTejun Heo 424093328e11SAlan Cox /* Devices which report 1 sector over size HPA */ 424193328e11SAlan Cox { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, 424293328e11SAlan Cox { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, 4243b152fcd3SMikko Rapeli { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, 424493328e11SAlan Cox 42456bbfd53dSAlan Cox /* Devices which get the IVB wrong */ 42466bbfd53dSAlan Cox { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, 4247a79067e5SAlan Cox /* Maybe we should just blacklist TSSTcorp... */ 42487da4c935SMark Lord { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, }, 42496bbfd53dSAlan Cox 42509ce8e307SJens Axboe /* Devices that do not need bridging limits applied */ 42519ce8e307SJens Axboe { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, 42529ce8e307SJens Axboe 42539062712fSTejun Heo /* Devices which aren't very happy with higher link speeds */ 42549062712fSTejun Heo { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, }, 42559062712fSTejun Heo 4256d0cb43b3STejun Heo /* 4257d0cb43b3STejun Heo * Devices which choke on SETXFER. Applies only if both the 4258d0cb43b3STejun Heo * device and controller are SATA. 4259d0cb43b3STejun Heo */ 4260d0cb43b3STejun Heo { "PIONEER DVD-RW DVRTD08", "1.00", ATA_HORKAGE_NOSETXFER }, 4261d0cb43b3STejun Heo 42626919a0a6SAlan Cox /* End Marker */ 42636919a0a6SAlan Cox { } 4264c6fd2807SJeff Garzik }; 4265c6fd2807SJeff Garzik 4266bce036ceSMark Lord /** 4267bce036ceSMark Lord * glob_match - match a text string against a glob-style pattern 4268bce036ceSMark Lord * @text: the string to be examined 4269bce036ceSMark Lord * @pattern: the glob-style pattern to be matched against 4270bce036ceSMark Lord * 4271bce036ceSMark Lord * Either/both of text and pattern can be empty strings. 4272bce036ceSMark Lord * 4273bce036ceSMark Lord * Match text against a glob-style pattern, with wildcards and simple sets: 4274bce036ceSMark Lord * 4275bce036ceSMark Lord * ? matches any single character. 4276bce036ceSMark Lord * * matches any run of characters. 4277bce036ceSMark Lord * [xyz] matches a single character from the set: x, y, or z. 42782f9e4d16SMark Lord * [a-d] matches a single character from the range: a, b, c, or d. 42792f9e4d16SMark Lord * [a-d0-9] matches a single character from either range. 4280bce036ceSMark Lord * 42812f9e4d16SMark Lord * The special characters ?, [, -, or *, can be matched using a set, eg. [*] 42822f9e4d16SMark Lord * Behaviour with malformed patterns is undefined, though generally reasonable. 4283bce036ceSMark Lord * 42843d2be54bSRandy Dunlap * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx" 4285bce036ceSMark Lord * 4286bce036ceSMark Lord * This function uses one level of recursion per '*' in pattern. 4287bce036ceSMark Lord * Since it calls _nothing_ else, and has _no_ explicit local variables, 4288bce036ceSMark Lord * this will not cause stack problems for any reasonable use here. 4289bce036ceSMark Lord * 4290bce036ceSMark Lord * RETURNS: 4291bce036ceSMark Lord * 0 on match, 1 otherwise. 4292539cc7c7SJeff Garzik */ 4293bce036ceSMark Lord static int glob_match (const char *text, const char *pattern) 4294bce036ceSMark Lord { 4295bce036ceSMark Lord do { 4296bce036ceSMark Lord /* Match single character or a '?' wildcard */ 4297bce036ceSMark Lord if (*text == *pattern || *pattern == '?') { 4298bce036ceSMark Lord if (!*pattern++) 4299bce036ceSMark Lord return 0; /* End of both strings: match */ 4300bce036ceSMark Lord } else { 4301bce036ceSMark Lord /* Match single char against a '[' bracketed ']' pattern set */ 4302bce036ceSMark Lord if (!*text || *pattern != '[') 4303bce036ceSMark Lord break; /* Not a pattern set */ 43042f9e4d16SMark Lord while (*++pattern && *pattern != ']' && *text != *pattern) { 43052f9e4d16SMark Lord if (*pattern == '-' && *(pattern - 1) != '[') 43062f9e4d16SMark Lord if (*text > *(pattern - 1) && *text < *(pattern + 1)) { 43072f9e4d16SMark Lord ++pattern; 43082f9e4d16SMark Lord break; 43092f9e4d16SMark Lord } 43102f9e4d16SMark Lord } 4311bce036ceSMark Lord if (!*pattern || *pattern == ']') 4312bce036ceSMark Lord return 1; /* No match */ 4313bce036ceSMark Lord while (*pattern && *pattern++ != ']'); 4314317b50b8SAndrew Paprocki } 4315bce036ceSMark Lord } while (*++text && *pattern); 4316539cc7c7SJeff Garzik 4317bce036ceSMark Lord /* Match any run of chars against a '*' wildcard */ 4318bce036ceSMark Lord if (*pattern == '*') { 4319bce036ceSMark Lord if (!*++pattern) 4320bce036ceSMark Lord return 0; /* Match: avoid recursion at end of pattern */ 4321bce036ceSMark Lord /* Loop to handle additional pattern chars after the wildcard */ 4322bce036ceSMark Lord while (*text) { 4323bce036ceSMark Lord if (glob_match(text, pattern) == 0) 4324bce036ceSMark Lord return 0; /* Remainder matched */ 4325bce036ceSMark Lord ++text; /* Absorb (match) this char and try again */ 4326bce036ceSMark Lord } 4327bce036ceSMark Lord } 4328bce036ceSMark Lord if (!*text && !*pattern) 4329bce036ceSMark Lord return 0; /* End of both strings: match */ 4330bce036ceSMark Lord return 1; /* No match */ 4331539cc7c7SJeff Garzik } 4332539cc7c7SJeff Garzik 433375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 4334c6fd2807SJeff Garzik { 43358bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 43368bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 43376919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 4338c6fd2807SJeff Garzik 43398bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 43408bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4341c6fd2807SJeff Garzik 43426919a0a6SAlan Cox while (ad->model_num) { 4343bce036ceSMark Lord if (!glob_match(model_num, ad->model_num)) { 43446919a0a6SAlan Cox if (ad->model_rev == NULL) 43456919a0a6SAlan Cox return ad->horkage; 4346bce036ceSMark Lord if (!glob_match(model_rev, ad->model_rev)) 43476919a0a6SAlan Cox return ad->horkage; 4348c6fd2807SJeff Garzik } 43496919a0a6SAlan Cox ad++; 4350c6fd2807SJeff Garzik } 4351c6fd2807SJeff Garzik return 0; 4352c6fd2807SJeff Garzik } 4353c6fd2807SJeff Garzik 43546919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 43556919a0a6SAlan Cox { 43566919a0a6SAlan Cox /* We don't support polling DMA. 43576919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 43586919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 43596919a0a6SAlan Cox */ 43609af5c9c9STejun Heo if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 43616919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 43626919a0a6SAlan Cox return 1; 436375683fe7STejun Heo return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 43646919a0a6SAlan Cox } 43656919a0a6SAlan Cox 4366c6fd2807SJeff Garzik /** 43676bbfd53dSAlan Cox * ata_is_40wire - check drive side detection 43686bbfd53dSAlan Cox * @dev: device 43696bbfd53dSAlan Cox * 43706bbfd53dSAlan Cox * Perform drive side detection decoding, allowing for device vendors 43716bbfd53dSAlan Cox * who can't follow the documentation. 43726bbfd53dSAlan Cox */ 43736bbfd53dSAlan Cox 43746bbfd53dSAlan Cox static int ata_is_40wire(struct ata_device *dev) 43756bbfd53dSAlan Cox { 43766bbfd53dSAlan Cox if (dev->horkage & ATA_HORKAGE_IVB) 43776bbfd53dSAlan Cox return ata_drive_40wire_relaxed(dev->id); 43786bbfd53dSAlan Cox return ata_drive_40wire(dev->id); 43796bbfd53dSAlan Cox } 43806bbfd53dSAlan Cox 43816bbfd53dSAlan Cox /** 438215a5551cSAlan Cox * cable_is_40wire - 40/80/SATA decider 438315a5551cSAlan Cox * @ap: port to consider 438415a5551cSAlan Cox * 438515a5551cSAlan Cox * This function encapsulates the policy for speed management 438615a5551cSAlan Cox * in one place. At the moment we don't cache the result but 438715a5551cSAlan Cox * there is a good case for setting ap->cbl to the result when 438815a5551cSAlan Cox * we are called with unknown cables (and figuring out if it 438915a5551cSAlan Cox * impacts hotplug at all). 439015a5551cSAlan Cox * 439115a5551cSAlan Cox * Return 1 if the cable appears to be 40 wire. 439215a5551cSAlan Cox */ 439315a5551cSAlan Cox 439415a5551cSAlan Cox static int cable_is_40wire(struct ata_port *ap) 439515a5551cSAlan Cox { 439615a5551cSAlan Cox struct ata_link *link; 439715a5551cSAlan Cox struct ata_device *dev; 439815a5551cSAlan Cox 43994a9c7b33STejun Heo /* If the controller thinks we are 40 wire, we are. */ 440015a5551cSAlan Cox if (ap->cbl == ATA_CBL_PATA40) 440115a5551cSAlan Cox return 1; 44024a9c7b33STejun Heo 44034a9c7b33STejun Heo /* If the controller thinks we are 80 wire, we are. */ 440415a5551cSAlan Cox if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 440515a5551cSAlan Cox return 0; 44064a9c7b33STejun Heo 44074a9c7b33STejun Heo /* If the system is known to be 40 wire short cable (eg 44084a9c7b33STejun Heo * laptop), then we allow 80 wire modes even if the drive 44094a9c7b33STejun Heo * isn't sure. 44104a9c7b33STejun Heo */ 4411f792068eSAlan Cox if (ap->cbl == ATA_CBL_PATA40_SHORT) 4412f792068eSAlan Cox return 0; 441315a5551cSAlan Cox 44144a9c7b33STejun Heo /* If the controller doesn't know, we scan. 44154a9c7b33STejun Heo * 44164a9c7b33STejun Heo * Note: We look for all 40 wire detects at this point. Any 44174a9c7b33STejun Heo * 80 wire detect is taken to be 80 wire cable because 44184a9c7b33STejun Heo * - in many setups only the one drive (slave if present) will 44194a9c7b33STejun Heo * give a valid detect 44204a9c7b33STejun Heo * - if you have a non detect capable drive you don't want it 44214a9c7b33STejun Heo * to colour the choice 442215a5551cSAlan Cox */ 44231eca4365STejun Heo ata_for_each_link(link, ap, EDGE) { 44241eca4365STejun Heo ata_for_each_dev(dev, link, ENABLED) { 44251eca4365STejun Heo if (!ata_is_40wire(dev)) 442615a5551cSAlan Cox return 0; 442715a5551cSAlan Cox } 442815a5551cSAlan Cox } 442915a5551cSAlan Cox return 1; 443015a5551cSAlan Cox } 443115a5551cSAlan Cox 443215a5551cSAlan Cox /** 4433c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 4434c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 4435c6fd2807SJeff Garzik * 4436c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 4437c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 4438c6fd2807SJeff Garzik * known limits including host controller limits, device 4439c6fd2807SJeff Garzik * blacklist, etc... 4440c6fd2807SJeff Garzik * 4441c6fd2807SJeff Garzik * LOCKING: 4442c6fd2807SJeff Garzik * None. 4443c6fd2807SJeff Garzik */ 4444c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 4445c6fd2807SJeff Garzik { 44469af5c9c9STejun Heo struct ata_link *link = dev->link; 44479af5c9c9STejun Heo struct ata_port *ap = link->ap; 4448cca3974eSJeff Garzik struct ata_host *host = ap->host; 4449c6fd2807SJeff Garzik unsigned long xfer_mask; 4450c6fd2807SJeff Garzik 4451c6fd2807SJeff Garzik /* controller modes available */ 4452c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 4453c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 4454c6fd2807SJeff Garzik 44558343f889SRobert Hancock /* drive modes available */ 4456c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4457c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 4458c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 4459c6fd2807SJeff Garzik 4460b352e57dSAlan Cox /* 4461b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 4462b352e57dSAlan Cox * cable 4463b352e57dSAlan Cox */ 4464b352e57dSAlan Cox if (ata_dev_pair(dev)) { 4465b352e57dSAlan Cox /* No PIO5 or PIO6 */ 4466b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4467b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 4468b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4469b352e57dSAlan Cox } 4470b352e57dSAlan Cox 4471c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 4472c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4473c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 4474c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 4475c6fd2807SJeff Garzik } 4476c6fd2807SJeff Garzik 447714d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 447814d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 4479c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4480c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 4481c6fd2807SJeff Garzik "other device, disabling DMA\n"); 4482c6fd2807SJeff Garzik } 4483c6fd2807SJeff Garzik 4484e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 4485e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 4486e424675fSJeff Garzik 4487c6fd2807SJeff Garzik if (ap->ops->mode_filter) 4488a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4489c6fd2807SJeff Garzik 44908343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 44918343f889SRobert Hancock * we handle hot plug the cable type can itself change. 44928343f889SRobert Hancock * Check this last so that we know if the transfer rate was 44938343f889SRobert Hancock * solely limited by the cable. 44948343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 44958343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 44968343f889SRobert Hancock * is used safely for 80 are not checked here. 44978343f889SRobert Hancock */ 44988343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 44998343f889SRobert Hancock /* UDMA/44 or higher would be available */ 450015a5551cSAlan Cox if (cable_is_40wire(ap)) { 45018343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 45028343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 45038343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 45048343f889SRobert Hancock } 45058343f889SRobert Hancock 4506c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4507c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 4508c6fd2807SJeff Garzik } 4509c6fd2807SJeff Garzik 4510c6fd2807SJeff Garzik /** 4511c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4512c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4513c6fd2807SJeff Garzik * 4514c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 4515c6fd2807SJeff Garzik * on port @ap. 4516c6fd2807SJeff Garzik * 4517c6fd2807SJeff Garzik * LOCKING: 4518c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 4519c6fd2807SJeff Garzik * 4520c6fd2807SJeff Garzik * RETURNS: 4521c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4522c6fd2807SJeff Garzik */ 4523c6fd2807SJeff Garzik 4524c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4525c6fd2807SJeff Garzik { 4526c6fd2807SJeff Garzik struct ata_taskfile tf; 4527c6fd2807SJeff Garzik unsigned int err_mask; 4528c6fd2807SJeff Garzik 4529c6fd2807SJeff Garzik /* set up set-features taskfile */ 4530c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 4531c6fd2807SJeff Garzik 4532464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 4533464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 4534464cf177STejun Heo */ 4535c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4536c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 4537c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 4538464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4539c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4540b9f8ab2dSAlan Cox /* If we are using IORDY we must send the mode setting command */ 4541b9f8ab2dSAlan Cox if (ata_pio_need_iordy(dev)) 4542c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 4543b9f8ab2dSAlan Cox /* If the device has IORDY and the controller does not - turn it off */ 4544b9f8ab2dSAlan Cox else if (ata_id_has_iordy(dev->id)) 4545b9f8ab2dSAlan Cox tf.nsect = 0x01; 4546b9f8ab2dSAlan Cox else /* In the ancient relic department - skip all of this */ 4547b9f8ab2dSAlan Cox return 0; 4548c6fd2807SJeff Garzik 45492b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4550c6fd2807SJeff Garzik 4551c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4552c6fd2807SJeff Garzik return err_mask; 4553c6fd2807SJeff Garzik } 4554c6fd2807SJeff Garzik /** 4555218f3d30SJeff Garzik * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES 45569f45cbd3SKristen Carlson Accardi * @dev: Device to which command will be sent 45579f45cbd3SKristen Carlson Accardi * @enable: Whether to enable or disable the feature 4558218f3d30SJeff Garzik * @feature: The sector count represents the feature to set 45599f45cbd3SKristen Carlson Accardi * 45609f45cbd3SKristen Carlson Accardi * Issue SET FEATURES - SATA FEATURES command to device @dev 4561218f3d30SJeff Garzik * on port @ap with sector count 45629f45cbd3SKristen Carlson Accardi * 45639f45cbd3SKristen Carlson Accardi * LOCKING: 45649f45cbd3SKristen Carlson Accardi * PCI/etc. bus probe sem. 45659f45cbd3SKristen Carlson Accardi * 45669f45cbd3SKristen Carlson Accardi * RETURNS: 45679f45cbd3SKristen Carlson Accardi * 0 on success, AC_ERR_* mask otherwise. 45689f45cbd3SKristen Carlson Accardi */ 4569218f3d30SJeff Garzik static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, 4570218f3d30SJeff Garzik u8 feature) 45719f45cbd3SKristen Carlson Accardi { 45729f45cbd3SKristen Carlson Accardi struct ata_taskfile tf; 45739f45cbd3SKristen Carlson Accardi unsigned int err_mask; 45749f45cbd3SKristen Carlson Accardi 45759f45cbd3SKristen Carlson Accardi /* set up set-features taskfile */ 45769f45cbd3SKristen Carlson Accardi DPRINTK("set features - SATA features\n"); 45779f45cbd3SKristen Carlson Accardi 45789f45cbd3SKristen Carlson Accardi ata_tf_init(dev, &tf); 45799f45cbd3SKristen Carlson Accardi tf.command = ATA_CMD_SET_FEATURES; 45809f45cbd3SKristen Carlson Accardi tf.feature = enable; 45819f45cbd3SKristen Carlson Accardi tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 45829f45cbd3SKristen Carlson Accardi tf.protocol = ATA_PROT_NODATA; 4583218f3d30SJeff Garzik tf.nsect = feature; 45849f45cbd3SKristen Carlson Accardi 45852b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 45869f45cbd3SKristen Carlson Accardi 45879f45cbd3SKristen Carlson Accardi DPRINTK("EXIT, err_mask=%x\n", err_mask); 45889f45cbd3SKristen Carlson Accardi return err_mask; 45899f45cbd3SKristen Carlson Accardi } 45909f45cbd3SKristen Carlson Accardi 45919f45cbd3SKristen Carlson Accardi /** 4592c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 4593c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4594c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 4595c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 4596c6fd2807SJeff Garzik * 4597c6fd2807SJeff Garzik * LOCKING: 4598c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4599c6fd2807SJeff Garzik * 4600c6fd2807SJeff Garzik * RETURNS: 4601c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4602c6fd2807SJeff Garzik */ 4603c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 4604c6fd2807SJeff Garzik u16 heads, u16 sectors) 4605c6fd2807SJeff Garzik { 4606c6fd2807SJeff Garzik struct ata_taskfile tf; 4607c6fd2807SJeff Garzik unsigned int err_mask; 4608c6fd2807SJeff Garzik 4609c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 4610c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4611c6fd2807SJeff Garzik return AC_ERR_INVALID; 4612c6fd2807SJeff Garzik 4613c6fd2807SJeff Garzik /* set up init dev params taskfile */ 4614c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 4615c6fd2807SJeff Garzik 4616c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4617c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 4618c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4619c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4620c6fd2807SJeff Garzik tf.nsect = sectors; 4621c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4622c6fd2807SJeff Garzik 46232b789108STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 462418b2466cSAlan Cox /* A clean abort indicates an original or just out of spec drive 462518b2466cSAlan Cox and we should continue as we issue the setup based on the 462618b2466cSAlan Cox drive reported working geometry */ 462718b2466cSAlan Cox if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 462818b2466cSAlan Cox err_mask = 0; 4629c6fd2807SJeff Garzik 4630c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4631c6fd2807SJeff Garzik return err_mask; 4632c6fd2807SJeff Garzik } 4633c6fd2807SJeff Garzik 4634c6fd2807SJeff Garzik /** 4635c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 4636c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 4637c6fd2807SJeff Garzik * 4638c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 4639c6fd2807SJeff Garzik * 4640c6fd2807SJeff Garzik * LOCKING: 4641cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4642c6fd2807SJeff Garzik */ 464370e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 4644c6fd2807SJeff Garzik { 4645c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4646ff2aeb1eSTejun Heo struct scatterlist *sg = qc->sg; 4647c6fd2807SJeff Garzik int dir = qc->dma_dir; 4648c6fd2807SJeff Garzik 4649efcb3cf7STejun Heo WARN_ON_ONCE(sg == NULL); 4650c6fd2807SJeff Garzik 4651dde20207SJames Bottomley VPRINTK("unmapping %u sg elements\n", qc->n_elem); 4652c6fd2807SJeff Garzik 4653dde20207SJames Bottomley if (qc->n_elem) 46545825627cSFUJITA Tomonori dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); 4655c6fd2807SJeff Garzik 4656c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4657ff2aeb1eSTejun Heo qc->sg = NULL; 4658c6fd2807SJeff Garzik } 4659c6fd2807SJeff Garzik 4660c6fd2807SJeff Garzik /** 46615895ef9aSTejun Heo * atapi_check_dma - Check whether ATAPI DMA can be supported 4662c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4663c6fd2807SJeff Garzik * 4664c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4665c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4666c6fd2807SJeff Garzik * supplied PACKET command. 4667c6fd2807SJeff Garzik * 4668c6fd2807SJeff Garzik * LOCKING: 4669cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4670c6fd2807SJeff Garzik * 4671c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4672c6fd2807SJeff Garzik * nonzero otherwise 4673c6fd2807SJeff Garzik */ 46745895ef9aSTejun Heo int atapi_check_dma(struct ata_queued_cmd *qc) 4675c6fd2807SJeff Garzik { 4676c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4677c6fd2807SJeff Garzik 4678b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4679b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4680b9a4197eSTejun Heo */ 46816a87e42eSTejun Heo if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && 46826a87e42eSTejun Heo unlikely(qc->nbytes & 15)) 46836f23a31dSAlbert Lee return 1; 46846f23a31dSAlbert Lee 4685c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4686b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4687c6fd2807SJeff Garzik 4688b9a4197eSTejun Heo return 0; 4689c6fd2807SJeff Garzik } 4690b9a4197eSTejun Heo 4691c6fd2807SJeff Garzik /** 469231cc23b3STejun Heo * ata_std_qc_defer - Check whether a qc needs to be deferred 469331cc23b3STejun Heo * @qc: ATA command in question 469431cc23b3STejun Heo * 469531cc23b3STejun Heo * Non-NCQ commands cannot run with any other command, NCQ or 469631cc23b3STejun Heo * not. As upper layer only knows the queue depth, we are 469731cc23b3STejun Heo * responsible for maintaining exclusion. This function checks 469831cc23b3STejun Heo * whether a new command @qc can be issued. 469931cc23b3STejun Heo * 470031cc23b3STejun Heo * LOCKING: 470131cc23b3STejun Heo * spin_lock_irqsave(host lock) 470231cc23b3STejun Heo * 470331cc23b3STejun Heo * RETURNS: 470431cc23b3STejun Heo * ATA_DEFER_* if deferring is needed, 0 otherwise. 470531cc23b3STejun Heo */ 470631cc23b3STejun Heo int ata_std_qc_defer(struct ata_queued_cmd *qc) 470731cc23b3STejun Heo { 470831cc23b3STejun Heo struct ata_link *link = qc->dev->link; 470931cc23b3STejun Heo 471031cc23b3STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 471131cc23b3STejun Heo if (!ata_tag_valid(link->active_tag)) 471231cc23b3STejun Heo return 0; 471331cc23b3STejun Heo } else { 471431cc23b3STejun Heo if (!ata_tag_valid(link->active_tag) && !link->sactive) 471531cc23b3STejun Heo return 0; 471631cc23b3STejun Heo } 471731cc23b3STejun Heo 471831cc23b3STejun Heo return ATA_DEFER_LINK; 471931cc23b3STejun Heo } 472031cc23b3STejun Heo 4721c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4722c6fd2807SJeff Garzik 4723c6fd2807SJeff Garzik /** 4724c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4725c6fd2807SJeff Garzik * @qc: Command to be associated 4726c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4727c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4728c6fd2807SJeff Garzik * 4729c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4730c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4731c6fd2807SJeff Garzik * elements. 4732c6fd2807SJeff Garzik * 4733c6fd2807SJeff Garzik * LOCKING: 4734cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4735c6fd2807SJeff Garzik */ 4736c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4737c6fd2807SJeff Garzik unsigned int n_elem) 4738c6fd2807SJeff Garzik { 4739ff2aeb1eSTejun Heo qc->sg = sg; 4740c6fd2807SJeff Garzik qc->n_elem = n_elem; 4741ff2aeb1eSTejun Heo qc->cursg = qc->sg; 4742ff2aeb1eSTejun Heo } 4743ff2aeb1eSTejun Heo 4744c6fd2807SJeff Garzik /** 4745c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4746c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4747c6fd2807SJeff Garzik * 4748c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4749c6fd2807SJeff Garzik * 4750c6fd2807SJeff Garzik * LOCKING: 4751cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4752c6fd2807SJeff Garzik * 4753c6fd2807SJeff Garzik * RETURNS: 4754c6fd2807SJeff Garzik * Zero on success, negative on error. 4755c6fd2807SJeff Garzik * 4756c6fd2807SJeff Garzik */ 4757c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4758c6fd2807SJeff Garzik { 4759c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4760dde20207SJames Bottomley unsigned int n_elem; 4761c6fd2807SJeff Garzik 476244877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4763c6fd2807SJeff Garzik 4764dde20207SJames Bottomley n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4765dde20207SJames Bottomley if (n_elem < 1) 4766c6fd2807SJeff Garzik return -1; 4767c6fd2807SJeff Garzik 4768dde20207SJames Bottomley DPRINTK("%d sg elements mapped\n", n_elem); 47695825627cSFUJITA Tomonori qc->orig_n_elem = qc->n_elem; 4770dde20207SJames Bottomley qc->n_elem = n_elem; 4771f92a2636STejun Heo qc->flags |= ATA_QCFLAG_DMAMAP; 4772c6fd2807SJeff Garzik 4773c6fd2807SJeff Garzik return 0; 4774c6fd2807SJeff Garzik } 4775c6fd2807SJeff Garzik 4776c6fd2807SJeff Garzik /** 4777c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4778c6fd2807SJeff Garzik * @buf: Buffer to swap 4779c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4780c6fd2807SJeff Garzik * 4781c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4782c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4783c6fd2807SJeff Garzik * vice-versa. 4784c6fd2807SJeff Garzik * 4785c6fd2807SJeff Garzik * LOCKING: 4786c6fd2807SJeff Garzik * Inherited from caller. 4787c6fd2807SJeff Garzik */ 4788c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4789c6fd2807SJeff Garzik { 4790c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4791c6fd2807SJeff Garzik unsigned int i; 4792c6fd2807SJeff Garzik 4793c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4794c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4795c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4796c6fd2807SJeff Garzik } 4797c6fd2807SJeff Garzik 4798c6fd2807SJeff Garzik /** 47998a8bc223STejun Heo * ata_qc_new - Request an available ATA command, for queueing 48005eb66fe0SRandy Dunlap * @ap: target port 48018a8bc223STejun Heo * 48028a8bc223STejun Heo * LOCKING: 48038a8bc223STejun Heo * None. 48048a8bc223STejun Heo */ 48058a8bc223STejun Heo 48068a8bc223STejun Heo static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 48078a8bc223STejun Heo { 48088a8bc223STejun Heo struct ata_queued_cmd *qc = NULL; 48098a8bc223STejun Heo unsigned int i; 48108a8bc223STejun Heo 48118a8bc223STejun Heo /* no command while frozen */ 48128a8bc223STejun Heo if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 48138a8bc223STejun Heo return NULL; 48148a8bc223STejun Heo 48158a8bc223STejun Heo /* the last tag is reserved for internal command. */ 48168a8bc223STejun Heo for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 48178a8bc223STejun Heo if (!test_and_set_bit(i, &ap->qc_allocated)) { 48188a8bc223STejun Heo qc = __ata_qc_from_tag(ap, i); 48198a8bc223STejun Heo break; 48208a8bc223STejun Heo } 48218a8bc223STejun Heo 48228a8bc223STejun Heo if (qc) 48238a8bc223STejun Heo qc->tag = i; 48248a8bc223STejun Heo 48258a8bc223STejun Heo return qc; 48268a8bc223STejun Heo } 48278a8bc223STejun Heo 48288a8bc223STejun Heo /** 4829c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 4830c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4831c6fd2807SJeff Garzik * 4832c6fd2807SJeff Garzik * LOCKING: 4833c6fd2807SJeff Garzik * None. 4834c6fd2807SJeff Garzik */ 4835c6fd2807SJeff Garzik 48368a8bc223STejun Heo struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 4837c6fd2807SJeff Garzik { 48389af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 4839c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4840c6fd2807SJeff Garzik 48418a8bc223STejun Heo qc = ata_qc_new(ap); 4842c6fd2807SJeff Garzik if (qc) { 4843c6fd2807SJeff Garzik qc->scsicmd = NULL; 4844c6fd2807SJeff Garzik qc->ap = ap; 4845c6fd2807SJeff Garzik qc->dev = dev; 4846c6fd2807SJeff Garzik 4847c6fd2807SJeff Garzik ata_qc_reinit(qc); 4848c6fd2807SJeff Garzik } 4849c6fd2807SJeff Garzik 4850c6fd2807SJeff Garzik return qc; 4851c6fd2807SJeff Garzik } 4852c6fd2807SJeff Garzik 48538a8bc223STejun Heo /** 48548a8bc223STejun Heo * ata_qc_free - free unused ata_queued_cmd 48558a8bc223STejun Heo * @qc: Command to complete 48568a8bc223STejun Heo * 48578a8bc223STejun Heo * Designed to free unused ata_queued_cmd object 48588a8bc223STejun Heo * in case something prevents using it. 48598a8bc223STejun Heo * 48608a8bc223STejun Heo * LOCKING: 48618a8bc223STejun Heo * spin_lock_irqsave(host lock) 48628a8bc223STejun Heo */ 48638a8bc223STejun Heo void ata_qc_free(struct ata_queued_cmd *qc) 48648a8bc223STejun Heo { 4865a1104016SJulia Lawall struct ata_port *ap; 48668a8bc223STejun Heo unsigned int tag; 48678a8bc223STejun Heo 4868efcb3cf7STejun Heo WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4869a1104016SJulia Lawall ap = qc->ap; 48708a8bc223STejun Heo 48718a8bc223STejun Heo qc->flags = 0; 48728a8bc223STejun Heo tag = qc->tag; 48738a8bc223STejun Heo if (likely(ata_tag_valid(tag))) { 48748a8bc223STejun Heo qc->tag = ATA_TAG_POISON; 48758a8bc223STejun Heo clear_bit(tag, &ap->qc_allocated); 48768a8bc223STejun Heo } 48778a8bc223STejun Heo } 48788a8bc223STejun Heo 4879c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 4880c6fd2807SJeff Garzik { 4881a1104016SJulia Lawall struct ata_port *ap; 4882a1104016SJulia Lawall struct ata_link *link; 4883c6fd2807SJeff Garzik 4884efcb3cf7STejun Heo WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4885efcb3cf7STejun Heo WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4886a1104016SJulia Lawall ap = qc->ap; 4887a1104016SJulia Lawall link = qc->dev->link; 4888c6fd2807SJeff Garzik 4889c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4890c6fd2807SJeff Garzik ata_sg_clean(qc); 4891c6fd2807SJeff Garzik 4892c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 4893da917d69STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 48949af5c9c9STejun Heo link->sactive &= ~(1 << qc->tag); 4895da917d69STejun Heo if (!link->sactive) 4896da917d69STejun Heo ap->nr_active_links--; 4897da917d69STejun Heo } else { 48989af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 4899da917d69STejun Heo ap->nr_active_links--; 4900da917d69STejun Heo } 4901da917d69STejun Heo 4902da917d69STejun Heo /* clear exclusive status */ 4903da917d69STejun Heo if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 4904da917d69STejun Heo ap->excl_link == link)) 4905da917d69STejun Heo ap->excl_link = NULL; 4906c6fd2807SJeff Garzik 4907c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 4908c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 4909c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 4910c6fd2807SJeff Garzik */ 4911c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 4912c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 4913c6fd2807SJeff Garzik 4914c6fd2807SJeff Garzik /* call completion callback */ 4915c6fd2807SJeff Garzik qc->complete_fn(qc); 4916c6fd2807SJeff Garzik } 4917c6fd2807SJeff Garzik 491839599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 491939599a53STejun Heo { 492039599a53STejun Heo struct ata_port *ap = qc->ap; 492139599a53STejun Heo 492239599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 492322183bf5STejun Heo ap->ops->qc_fill_rtf(qc); 492439599a53STejun Heo } 492539599a53STejun Heo 492600115e0fSTejun Heo static void ata_verify_xfer(struct ata_queued_cmd *qc) 492700115e0fSTejun Heo { 492800115e0fSTejun Heo struct ata_device *dev = qc->dev; 492900115e0fSTejun Heo 493000115e0fSTejun Heo if (ata_tag_internal(qc->tag)) 493100115e0fSTejun Heo return; 493200115e0fSTejun Heo 493300115e0fSTejun Heo if (ata_is_nodata(qc->tf.protocol)) 493400115e0fSTejun Heo return; 493500115e0fSTejun Heo 493600115e0fSTejun Heo if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 493700115e0fSTejun Heo return; 493800115e0fSTejun Heo 493900115e0fSTejun Heo dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 494000115e0fSTejun Heo } 494100115e0fSTejun Heo 4942c6fd2807SJeff Garzik /** 4943c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 4944c6fd2807SJeff Garzik * @qc: Command to complete 4945c6fd2807SJeff Garzik * 4946c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 4947c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 4948c6fd2807SJeff Garzik * 4949c6fd2807SJeff Garzik * LOCKING: 4950cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4951c6fd2807SJeff Garzik */ 4952c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 4953c6fd2807SJeff Garzik { 4954c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4955c6fd2807SJeff Garzik 4956c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 4957c6fd2807SJeff Garzik * synchronize EH with regular execution path. 4958c6fd2807SJeff Garzik * 4959c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4960c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 4961c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 4962c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 4963c6fd2807SJeff Garzik * 4964c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 4965c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4966c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 4967c6fd2807SJeff Garzik * taken care of. 4968c6fd2807SJeff Garzik */ 4969c6fd2807SJeff Garzik if (ap->ops->error_handler) { 49704dbfa39bSTejun Heo struct ata_device *dev = qc->dev; 49714dbfa39bSTejun Heo struct ata_eh_info *ehi = &dev->link->eh_info; 49724dbfa39bSTejun Heo 4973c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4974c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 4975c6fd2807SJeff Garzik 4976c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4977c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 497839599a53STejun Heo fill_result_tf(qc); 4979f4b31db9STejun Heo 4980f4b31db9STejun Heo if (!ata_tag_internal(qc->tag)) 4981c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 4982f4b31db9STejun Heo else 4983f4b31db9STejun Heo __ata_qc_complete(qc); 4984c6fd2807SJeff Garzik return; 4985c6fd2807SJeff Garzik } 4986c6fd2807SJeff Garzik 49874dc738edSTejun Heo WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); 49884dc738edSTejun Heo 4989c6fd2807SJeff Garzik /* read result TF if requested */ 4990c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 499139599a53STejun Heo fill_result_tf(qc); 4992c6fd2807SJeff Garzik 49934dbfa39bSTejun Heo /* Some commands need post-processing after successful 49944dbfa39bSTejun Heo * completion. 49954dbfa39bSTejun Heo */ 49964dbfa39bSTejun Heo switch (qc->tf.command) { 49974dbfa39bSTejun Heo case ATA_CMD_SET_FEATURES: 49984dbfa39bSTejun Heo if (qc->tf.feature != SETFEATURES_WC_ON && 49994dbfa39bSTejun Heo qc->tf.feature != SETFEATURES_WC_OFF) 50004dbfa39bSTejun Heo break; 50014dbfa39bSTejun Heo /* fall through */ 50024dbfa39bSTejun Heo case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 50034dbfa39bSTejun Heo case ATA_CMD_SET_MULTI: /* multi_count changed */ 50044dbfa39bSTejun Heo /* revalidate device */ 50054dbfa39bSTejun Heo ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 50064dbfa39bSTejun Heo ata_port_schedule_eh(ap); 50074dbfa39bSTejun Heo break; 5008054a5fbaSTejun Heo 5009054a5fbaSTejun Heo case ATA_CMD_SLEEP: 5010054a5fbaSTejun Heo dev->flags |= ATA_DFLAG_SLEEPING; 5011054a5fbaSTejun Heo break; 50124dbfa39bSTejun Heo } 50134dbfa39bSTejun Heo 501400115e0fSTejun Heo if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 501500115e0fSTejun Heo ata_verify_xfer(qc); 501600115e0fSTejun Heo 5017c6fd2807SJeff Garzik __ata_qc_complete(qc); 5018c6fd2807SJeff Garzik } else { 5019c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 5020c6fd2807SJeff Garzik return; 5021c6fd2807SJeff Garzik 5022c6fd2807SJeff Garzik /* read result TF if failed or requested */ 5023c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 502439599a53STejun Heo fill_result_tf(qc); 5025c6fd2807SJeff Garzik 5026c6fd2807SJeff Garzik __ata_qc_complete(qc); 5027c6fd2807SJeff Garzik } 5028c6fd2807SJeff Garzik } 5029c6fd2807SJeff Garzik 5030c6fd2807SJeff Garzik /** 5031c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 5032c6fd2807SJeff Garzik * @ap: port in question 5033c6fd2807SJeff Garzik * @qc_active: new qc_active mask 5034c6fd2807SJeff Garzik * 5035c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 5036c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 5037c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 5038c6fd2807SJeff Garzik * and commands are completed accordingly. 5039c6fd2807SJeff Garzik * 5040c6fd2807SJeff Garzik * LOCKING: 5041cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5042c6fd2807SJeff Garzik * 5043c6fd2807SJeff Garzik * RETURNS: 5044c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 5045c6fd2807SJeff Garzik */ 504679f97dadSTejun Heo int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) 5047c6fd2807SJeff Garzik { 5048c6fd2807SJeff Garzik int nr_done = 0; 5049c6fd2807SJeff Garzik u32 done_mask; 5050c6fd2807SJeff Garzik 5051c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 5052c6fd2807SJeff Garzik 5053c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 5054c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 5055c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 5056c6fd2807SJeff Garzik return -EINVAL; 5057c6fd2807SJeff Garzik } 5058c6fd2807SJeff Garzik 505943768180SJens Axboe while (done_mask) { 5060c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 506143768180SJens Axboe unsigned int tag = __ffs(done_mask); 5062c6fd2807SJeff Garzik 506343768180SJens Axboe qc = ata_qc_from_tag(ap, tag); 506443768180SJens Axboe if (qc) { 5065c6fd2807SJeff Garzik ata_qc_complete(qc); 5066c6fd2807SJeff Garzik nr_done++; 5067c6fd2807SJeff Garzik } 506843768180SJens Axboe done_mask &= ~(1 << tag); 5069c6fd2807SJeff Garzik } 5070c6fd2807SJeff Garzik 5071c6fd2807SJeff Garzik return nr_done; 5072c6fd2807SJeff Garzik } 5073c6fd2807SJeff Garzik 5074c6fd2807SJeff Garzik /** 5075c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 5076c6fd2807SJeff Garzik * @qc: command to issue to device 5077c6fd2807SJeff Garzik * 5078c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 5079c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 5080c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 5081c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 5082c6fd2807SJeff Garzik * 5083c6fd2807SJeff Garzik * LOCKING: 5084cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5085c6fd2807SJeff Garzik */ 5086c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 5087c6fd2807SJeff Garzik { 5088c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 50899af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 5090405e66b3STejun Heo u8 prot = qc->tf.protocol; 5091c6fd2807SJeff Garzik 5092c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 5093c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 5094c6fd2807SJeff Garzik * request ATAPI sense. 5095c6fd2807SJeff Garzik */ 5096efcb3cf7STejun Heo WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); 5097c6fd2807SJeff Garzik 50981973a023STejun Heo if (ata_is_ncq(prot)) { 5099efcb3cf7STejun Heo WARN_ON_ONCE(link->sactive & (1 << qc->tag)); 5100da917d69STejun Heo 5101da917d69STejun Heo if (!link->sactive) 5102da917d69STejun Heo ap->nr_active_links++; 51039af5c9c9STejun Heo link->sactive |= 1 << qc->tag; 5104c6fd2807SJeff Garzik } else { 5105efcb3cf7STejun Heo WARN_ON_ONCE(link->sactive); 5106da917d69STejun Heo 5107da917d69STejun Heo ap->nr_active_links++; 51089af5c9c9STejun Heo link->active_tag = qc->tag; 5109c6fd2807SJeff Garzik } 5110c6fd2807SJeff Garzik 5111c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 5112c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 5113c6fd2807SJeff Garzik 5114f92a2636STejun Heo /* We guarantee to LLDs that they will have at least one 5115f92a2636STejun Heo * non-zero sg if the command is a data command. 5116f92a2636STejun Heo */ 5117ff2aeb1eSTejun Heo BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); 5118f92a2636STejun Heo 5119405e66b3STejun Heo if (ata_is_dma(prot) || (ata_is_pio(prot) && 5120f92a2636STejun Heo (ap->flags & ATA_FLAG_PIO_DMA))) 5121c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 5122c6fd2807SJeff Garzik goto sg_err; 5123c6fd2807SJeff Garzik 5124cf480626STejun Heo /* if device is sleeping, schedule reset and abort the link */ 5125054a5fbaSTejun Heo if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 5126cf480626STejun Heo link->eh_info.action |= ATA_EH_RESET; 5127054a5fbaSTejun Heo ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 5128054a5fbaSTejun Heo ata_link_abort(link); 5129054a5fbaSTejun Heo return; 5130054a5fbaSTejun Heo } 5131054a5fbaSTejun Heo 5132c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 5133c6fd2807SJeff Garzik 5134c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 5135c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5136c6fd2807SJeff Garzik goto err; 5137c6fd2807SJeff Garzik return; 5138c6fd2807SJeff Garzik 5139c6fd2807SJeff Garzik sg_err: 5140c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 5141c6fd2807SJeff Garzik err: 5142c6fd2807SJeff Garzik ata_qc_complete(qc); 5143c6fd2807SJeff Garzik } 5144c6fd2807SJeff Garzik 5145c6fd2807SJeff Garzik /** 5146c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5147936fd732STejun Heo * @link: ATA link to test SCR accessibility for 5148c6fd2807SJeff Garzik * 5149936fd732STejun Heo * Test whether SCRs are accessible for @link. 5150c6fd2807SJeff Garzik * 5151c6fd2807SJeff Garzik * LOCKING: 5152c6fd2807SJeff Garzik * None. 5153c6fd2807SJeff Garzik * 5154c6fd2807SJeff Garzik * RETURNS: 5155c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5156c6fd2807SJeff Garzik */ 5157936fd732STejun Heo int sata_scr_valid(struct ata_link *link) 5158c6fd2807SJeff Garzik { 5159936fd732STejun Heo struct ata_port *ap = link->ap; 5160936fd732STejun Heo 5161a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 5162c6fd2807SJeff Garzik } 5163c6fd2807SJeff Garzik 5164c6fd2807SJeff Garzik /** 5165c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5166936fd732STejun Heo * @link: ATA link to read SCR for 5167c6fd2807SJeff Garzik * @reg: SCR to read 5168c6fd2807SJeff Garzik * @val: Place to store read value 5169c6fd2807SJeff Garzik * 5170936fd732STejun Heo * Read SCR register @reg of @link into *@val. This function is 5171633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 5172633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 5173c6fd2807SJeff Garzik * 5174c6fd2807SJeff Garzik * LOCKING: 5175633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 5176c6fd2807SJeff Garzik * 5177c6fd2807SJeff Garzik * RETURNS: 5178c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5179c6fd2807SJeff Garzik */ 5180936fd732STejun Heo int sata_scr_read(struct ata_link *link, int reg, u32 *val) 5181c6fd2807SJeff Garzik { 5182633273a3STejun Heo if (ata_is_host_link(link)) { 5183936fd732STejun Heo if (sata_scr_valid(link)) 518482ef04fbSTejun Heo return link->ap->ops->scr_read(link, reg, val); 5185c6fd2807SJeff Garzik return -EOPNOTSUPP; 5186c6fd2807SJeff Garzik } 5187c6fd2807SJeff Garzik 5188633273a3STejun Heo return sata_pmp_scr_read(link, reg, val); 5189633273a3STejun Heo } 5190633273a3STejun Heo 5191c6fd2807SJeff Garzik /** 5192c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5193936fd732STejun Heo * @link: ATA link to write SCR for 5194c6fd2807SJeff Garzik * @reg: SCR to write 5195c6fd2807SJeff Garzik * @val: value to write 5196c6fd2807SJeff Garzik * 5197936fd732STejun Heo * Write @val to SCR register @reg of @link. This function is 5198633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 5199633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 5200c6fd2807SJeff Garzik * 5201c6fd2807SJeff Garzik * LOCKING: 5202633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 5203c6fd2807SJeff Garzik * 5204c6fd2807SJeff Garzik * RETURNS: 5205c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5206c6fd2807SJeff Garzik */ 5207936fd732STejun Heo int sata_scr_write(struct ata_link *link, int reg, u32 val) 5208c6fd2807SJeff Garzik { 5209633273a3STejun Heo if (ata_is_host_link(link)) { 5210936fd732STejun Heo if (sata_scr_valid(link)) 521182ef04fbSTejun Heo return link->ap->ops->scr_write(link, reg, val); 5212c6fd2807SJeff Garzik return -EOPNOTSUPP; 5213c6fd2807SJeff Garzik } 5214c6fd2807SJeff Garzik 5215633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 5216633273a3STejun Heo } 5217633273a3STejun Heo 5218c6fd2807SJeff Garzik /** 5219c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5220936fd732STejun Heo * @link: ATA link to write SCR for 5221c6fd2807SJeff Garzik * @reg: SCR to write 5222c6fd2807SJeff Garzik * @val: value to write 5223c6fd2807SJeff Garzik * 5224c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5225c6fd2807SJeff Garzik * function performs flush after writing to the register. 5226c6fd2807SJeff Garzik * 5227c6fd2807SJeff Garzik * LOCKING: 5228633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 5229c6fd2807SJeff Garzik * 5230c6fd2807SJeff Garzik * RETURNS: 5231c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5232c6fd2807SJeff Garzik */ 5233936fd732STejun Heo int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 5234c6fd2807SJeff Garzik { 5235633273a3STejun Heo if (ata_is_host_link(link)) { 5236da3dbb17STejun Heo int rc; 5237da3dbb17STejun Heo 5238936fd732STejun Heo if (sata_scr_valid(link)) { 523982ef04fbSTejun Heo rc = link->ap->ops->scr_write(link, reg, val); 5240da3dbb17STejun Heo if (rc == 0) 524182ef04fbSTejun Heo rc = link->ap->ops->scr_read(link, reg, &val); 5242da3dbb17STejun Heo return rc; 5243c6fd2807SJeff Garzik } 5244c6fd2807SJeff Garzik return -EOPNOTSUPP; 5245c6fd2807SJeff Garzik } 5246c6fd2807SJeff Garzik 5247633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 5248633273a3STejun Heo } 5249633273a3STejun Heo 5250c6fd2807SJeff Garzik /** 5251b1c72916STejun Heo * ata_phys_link_online - test whether the given link is online 5252936fd732STejun Heo * @link: ATA link to test 5253c6fd2807SJeff Garzik * 5254936fd732STejun Heo * Test whether @link is online. Note that this function returns 5255936fd732STejun Heo * 0 if online status of @link cannot be obtained, so 5256936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 5257c6fd2807SJeff Garzik * 5258c6fd2807SJeff Garzik * LOCKING: 5259c6fd2807SJeff Garzik * None. 5260c6fd2807SJeff Garzik * 5261c6fd2807SJeff Garzik * RETURNS: 5262b5b3fa38STejun Heo * True if the port online status is available and online. 5263c6fd2807SJeff Garzik */ 5264b1c72916STejun Heo bool ata_phys_link_online(struct ata_link *link) 5265c6fd2807SJeff Garzik { 5266c6fd2807SJeff Garzik u32 sstatus; 5267c6fd2807SJeff Garzik 5268936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 52699913ff8aSTejun Heo ata_sstatus_online(sstatus)) 5270b5b3fa38STejun Heo return true; 5271b5b3fa38STejun Heo return false; 5272c6fd2807SJeff Garzik } 5273c6fd2807SJeff Garzik 5274c6fd2807SJeff Garzik /** 5275b1c72916STejun Heo * ata_phys_link_offline - test whether the given link is offline 5276936fd732STejun Heo * @link: ATA link to test 5277c6fd2807SJeff Garzik * 5278936fd732STejun Heo * Test whether @link is offline. Note that this function 5279936fd732STejun Heo * returns 0 if offline status of @link cannot be obtained, so 5280936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 5281c6fd2807SJeff Garzik * 5282c6fd2807SJeff Garzik * LOCKING: 5283c6fd2807SJeff Garzik * None. 5284c6fd2807SJeff Garzik * 5285c6fd2807SJeff Garzik * RETURNS: 5286b5b3fa38STejun Heo * True if the port offline status is available and offline. 5287c6fd2807SJeff Garzik */ 5288b1c72916STejun Heo bool ata_phys_link_offline(struct ata_link *link) 5289c6fd2807SJeff Garzik { 5290c6fd2807SJeff Garzik u32 sstatus; 5291c6fd2807SJeff Garzik 5292936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 52939913ff8aSTejun Heo !ata_sstatus_online(sstatus)) 5294b5b3fa38STejun Heo return true; 5295b5b3fa38STejun Heo return false; 5296c6fd2807SJeff Garzik } 5297c6fd2807SJeff Garzik 5298b1c72916STejun Heo /** 5299b1c72916STejun Heo * ata_link_online - test whether the given link is online 5300b1c72916STejun Heo * @link: ATA link to test 5301b1c72916STejun Heo * 5302b1c72916STejun Heo * Test whether @link is online. This is identical to 5303b1c72916STejun Heo * ata_phys_link_online() when there's no slave link. When 5304b1c72916STejun Heo * there's a slave link, this function should only be called on 5305b1c72916STejun Heo * the master link and will return true if any of M/S links is 5306b1c72916STejun Heo * online. 5307b1c72916STejun Heo * 5308b1c72916STejun Heo * LOCKING: 5309b1c72916STejun Heo * None. 5310b1c72916STejun Heo * 5311b1c72916STejun Heo * RETURNS: 5312b1c72916STejun Heo * True if the port online status is available and online. 5313b1c72916STejun Heo */ 5314b1c72916STejun Heo bool ata_link_online(struct ata_link *link) 5315b1c72916STejun Heo { 5316b1c72916STejun Heo struct ata_link *slave = link->ap->slave_link; 5317b1c72916STejun Heo 5318b1c72916STejun Heo WARN_ON(link == slave); /* shouldn't be called on slave link */ 5319b1c72916STejun Heo 5320b1c72916STejun Heo return ata_phys_link_online(link) || 5321b1c72916STejun Heo (slave && ata_phys_link_online(slave)); 5322b1c72916STejun Heo } 5323b1c72916STejun Heo 5324b1c72916STejun Heo /** 5325b1c72916STejun Heo * ata_link_offline - test whether the given link is offline 5326b1c72916STejun Heo * @link: ATA link to test 5327b1c72916STejun Heo * 5328b1c72916STejun Heo * Test whether @link is offline. This is identical to 5329b1c72916STejun Heo * ata_phys_link_offline() when there's no slave link. When 5330b1c72916STejun Heo * there's a slave link, this function should only be called on 5331b1c72916STejun Heo * the master link and will return true if both M/S links are 5332b1c72916STejun Heo * offline. 5333b1c72916STejun Heo * 5334b1c72916STejun Heo * LOCKING: 5335b1c72916STejun Heo * None. 5336b1c72916STejun Heo * 5337b1c72916STejun Heo * RETURNS: 5338b1c72916STejun Heo * True if the port offline status is available and offline. 5339b1c72916STejun Heo */ 5340b1c72916STejun Heo bool ata_link_offline(struct ata_link *link) 5341b1c72916STejun Heo { 5342b1c72916STejun Heo struct ata_link *slave = link->ap->slave_link; 5343b1c72916STejun Heo 5344b1c72916STejun Heo WARN_ON(link == slave); /* shouldn't be called on slave link */ 5345b1c72916STejun Heo 5346b1c72916STejun Heo return ata_phys_link_offline(link) && 5347b1c72916STejun Heo (!slave || ata_phys_link_offline(slave)); 5348b1c72916STejun Heo } 5349b1c72916STejun Heo 53506ffa01d8STejun Heo #ifdef CONFIG_PM 5351cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5352cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5353cca3974eSJeff Garzik int wait) 5354c6fd2807SJeff Garzik { 5355c6fd2807SJeff Garzik unsigned long flags; 5356c6fd2807SJeff Garzik int i, rc; 5357c6fd2807SJeff Garzik 5358cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5359cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5360e3667ebfSTejun Heo struct ata_link *link; 5361c6fd2807SJeff Garzik 5362c6fd2807SJeff Garzik /* Previous resume operation might still be in 5363c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5364c6fd2807SJeff Garzik */ 5365c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5366c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5367c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5368c6fd2807SJeff Garzik } 5369c6fd2807SJeff Garzik 5370c6fd2807SJeff Garzik /* request PM ops to EH */ 5371c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5372c6fd2807SJeff Garzik 5373c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5374c6fd2807SJeff Garzik if (wait) { 5375c6fd2807SJeff Garzik rc = 0; 5376c6fd2807SJeff Garzik ap->pm_result = &rc; 5377c6fd2807SJeff Garzik } 5378c6fd2807SJeff Garzik 5379c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 53801eca4365STejun Heo ata_for_each_link(link, ap, HOST_FIRST) { 5381e3667ebfSTejun Heo link->eh_info.action |= action; 5382e3667ebfSTejun Heo link->eh_info.flags |= ehi_flags; 5383e3667ebfSTejun Heo } 5384c6fd2807SJeff Garzik 5385c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5386c6fd2807SJeff Garzik 5387c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5388c6fd2807SJeff Garzik 5389c6fd2807SJeff Garzik /* wait and check result */ 5390c6fd2807SJeff Garzik if (wait) { 5391c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5392c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5393c6fd2807SJeff Garzik if (rc) 5394c6fd2807SJeff Garzik return rc; 5395c6fd2807SJeff Garzik } 5396c6fd2807SJeff Garzik } 5397c6fd2807SJeff Garzik 5398c6fd2807SJeff Garzik return 0; 5399c6fd2807SJeff Garzik } 5400c6fd2807SJeff Garzik 5401c6fd2807SJeff Garzik /** 5402cca3974eSJeff Garzik * ata_host_suspend - suspend host 5403cca3974eSJeff Garzik * @host: host to suspend 5404c6fd2807SJeff Garzik * @mesg: PM message 5405c6fd2807SJeff Garzik * 5406cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5407c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5408c6fd2807SJeff Garzik * to finish. 5409c6fd2807SJeff Garzik * 5410c6fd2807SJeff Garzik * LOCKING: 5411c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5412c6fd2807SJeff Garzik * 5413c6fd2807SJeff Garzik * RETURNS: 5414c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5415c6fd2807SJeff Garzik */ 5416cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5417c6fd2807SJeff Garzik { 54189666f400STejun Heo int rc; 5419c6fd2807SJeff Garzik 5420ca77329fSKristen Carlson Accardi /* 5421ca77329fSKristen Carlson Accardi * disable link pm on all ports before requesting 5422ca77329fSKristen Carlson Accardi * any pm activity 5423ca77329fSKristen Carlson Accardi */ 5424ca77329fSKristen Carlson Accardi ata_lpm_enable(host); 5425ca77329fSKristen Carlson Accardi 5426cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 542772ad6ec4SJeff Garzik if (rc == 0) 542872ad6ec4SJeff Garzik host->dev->power.power_state = mesg; 5429c6fd2807SJeff Garzik return rc; 5430c6fd2807SJeff Garzik } 5431c6fd2807SJeff Garzik 5432c6fd2807SJeff Garzik /** 5433cca3974eSJeff Garzik * ata_host_resume - resume host 5434cca3974eSJeff Garzik * @host: host to resume 5435c6fd2807SJeff Garzik * 5436cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5437c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5438c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5439c6fd2807SJeff Garzik * 5440c6fd2807SJeff Garzik * LOCKING: 5441c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5442c6fd2807SJeff Garzik */ 5443cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5444c6fd2807SJeff Garzik { 5445cf480626STejun Heo ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, 5446c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 544772ad6ec4SJeff Garzik host->dev->power.power_state = PMSG_ON; 5448ca77329fSKristen Carlson Accardi 5449ca77329fSKristen Carlson Accardi /* reenable link pm */ 5450ca77329fSKristen Carlson Accardi ata_lpm_disable(host); 5451c6fd2807SJeff Garzik } 54526ffa01d8STejun Heo #endif 5453c6fd2807SJeff Garzik 5454c6fd2807SJeff Garzik /** 5455c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5456c6fd2807SJeff Garzik * @dev: Device structure to initialize 5457c6fd2807SJeff Garzik * 5458c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5459c6fd2807SJeff Garzik * 5460c6fd2807SJeff Garzik * LOCKING: 5461c6fd2807SJeff Garzik * Inherited from caller. 5462c6fd2807SJeff Garzik */ 5463c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5464c6fd2807SJeff Garzik { 5465b1c72916STejun Heo struct ata_link *link = ata_dev_phys_link(dev); 54669af5c9c9STejun Heo struct ata_port *ap = link->ap; 5467c6fd2807SJeff Garzik unsigned long flags; 5468c6fd2807SJeff Garzik 5469b1c72916STejun Heo /* SATA spd limit is bound to the attached device, reset together */ 54709af5c9c9STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 54719af5c9c9STejun Heo link->sata_spd = 0; 5472c6fd2807SJeff Garzik 5473c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5474c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5475cca3974eSJeff Garzik * host lock. 5476c6fd2807SJeff Garzik */ 5477c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5478c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 54793dcc323fSTejun Heo dev->horkage = 0; 5480c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5481c6fd2807SJeff Garzik 548299cf610aSTejun Heo memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, 548399cf610aSTejun Heo ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); 5484c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 5485c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 5486c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 5487c6fd2807SJeff Garzik } 5488c6fd2807SJeff Garzik 5489c6fd2807SJeff Garzik /** 54904fb37a25STejun Heo * ata_link_init - Initialize an ata_link structure 54914fb37a25STejun Heo * @ap: ATA port link is attached to 54924fb37a25STejun Heo * @link: Link structure to initialize 54938989805dSTejun Heo * @pmp: Port multiplier port number 54944fb37a25STejun Heo * 54954fb37a25STejun Heo * Initialize @link. 54964fb37a25STejun Heo * 54974fb37a25STejun Heo * LOCKING: 54984fb37a25STejun Heo * Kernel thread context (may sleep) 54994fb37a25STejun Heo */ 5500fb7fd614STejun Heo void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 55014fb37a25STejun Heo { 55024fb37a25STejun Heo int i; 55034fb37a25STejun Heo 55044fb37a25STejun Heo /* clear everything except for devices */ 55054fb37a25STejun Heo memset(link, 0, offsetof(struct ata_link, device[0])); 55064fb37a25STejun Heo 55074fb37a25STejun Heo link->ap = ap; 55088989805dSTejun Heo link->pmp = pmp; 55094fb37a25STejun Heo link->active_tag = ATA_TAG_POISON; 55104fb37a25STejun Heo link->hw_sata_spd_limit = UINT_MAX; 55114fb37a25STejun Heo 55124fb37a25STejun Heo /* can't use iterator, ap isn't initialized yet */ 55134fb37a25STejun Heo for (i = 0; i < ATA_MAX_DEVICES; i++) { 55144fb37a25STejun Heo struct ata_device *dev = &link->device[i]; 55154fb37a25STejun Heo 55164fb37a25STejun Heo dev->link = link; 55174fb37a25STejun Heo dev->devno = dev - link->device; 5518110f66d2STejun Heo #ifdef CONFIG_ATA_ACPI 5519110f66d2STejun Heo dev->gtf_filter = ata_acpi_gtf_filter; 5520110f66d2STejun Heo #endif 55214fb37a25STejun Heo ata_dev_init(dev); 55224fb37a25STejun Heo } 55234fb37a25STejun Heo } 55244fb37a25STejun Heo 55254fb37a25STejun Heo /** 55264fb37a25STejun Heo * sata_link_init_spd - Initialize link->sata_spd_limit 55274fb37a25STejun Heo * @link: Link to configure sata_spd_limit for 55284fb37a25STejun Heo * 55294fb37a25STejun Heo * Initialize @link->[hw_]sata_spd_limit to the currently 55304fb37a25STejun Heo * configured value. 55314fb37a25STejun Heo * 55324fb37a25STejun Heo * LOCKING: 55334fb37a25STejun Heo * Kernel thread context (may sleep). 55344fb37a25STejun Heo * 55354fb37a25STejun Heo * RETURNS: 55364fb37a25STejun Heo * 0 on success, -errno on failure. 55374fb37a25STejun Heo */ 5538fb7fd614STejun Heo int sata_link_init_spd(struct ata_link *link) 55394fb37a25STejun Heo { 554033267325STejun Heo u8 spd; 55414fb37a25STejun Heo int rc; 55424fb37a25STejun Heo 5543d127ea7bSTejun Heo rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 55444fb37a25STejun Heo if (rc) 55454fb37a25STejun Heo return rc; 55464fb37a25STejun Heo 5547d127ea7bSTejun Heo spd = (link->saved_scontrol >> 4) & 0xf; 55484fb37a25STejun Heo if (spd) 55494fb37a25STejun Heo link->hw_sata_spd_limit &= (1 << spd) - 1; 55504fb37a25STejun Heo 555105944bdfSTejun Heo ata_force_link_limits(link); 555233267325STejun Heo 55534fb37a25STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 55544fb37a25STejun Heo 55554fb37a25STejun Heo return 0; 55564fb37a25STejun Heo } 55574fb37a25STejun Heo 55584fb37a25STejun Heo /** 5559f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 5560f3187195STejun Heo * @host: ATA host this allocated port belongs to 5561c6fd2807SJeff Garzik * 5562f3187195STejun Heo * Allocate and initialize basic ATA port resources. 5563f3187195STejun Heo * 5564f3187195STejun Heo * RETURNS: 5565f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 5566c6fd2807SJeff Garzik * 5567c6fd2807SJeff Garzik * LOCKING: 5568f3187195STejun Heo * Inherited from calling layer (may sleep). 5569c6fd2807SJeff Garzik */ 5570f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 5571c6fd2807SJeff Garzik { 5572f3187195STejun Heo struct ata_port *ap; 5573c6fd2807SJeff Garzik 5574f3187195STejun Heo DPRINTK("ENTER\n"); 5575f3187195STejun Heo 5576f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 5577f3187195STejun Heo if (!ap) 5578f3187195STejun Heo return NULL; 5579f3187195STejun Heo 5580f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 5581cca3974eSJeff Garzik ap->lock = &host->lock; 5582f3187195STejun Heo ap->print_id = -1; 5583cca3974eSJeff Garzik ap->host = host; 5584f3187195STejun Heo ap->dev = host->dev; 5585c6fd2807SJeff Garzik 5586c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 5587c6fd2807SJeff Garzik /* turn on all debugging levels */ 5588c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 5589c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 5590c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5591c6fd2807SJeff Garzik #else 5592c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5593c6fd2807SJeff Garzik #endif 5594c6fd2807SJeff Garzik 5595ad72cf98STejun Heo mutex_init(&ap->scsi_scan_mutex); 559665f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 559765f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5598c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 5599c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 560045fabbb7SElias Oltmanns init_completion(&ap->park_req_pending); 56015ddf24c5STejun Heo init_timer_deferrable(&ap->fastdrain_timer); 56025ddf24c5STejun Heo ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 56035ddf24c5STejun Heo ap->fastdrain_timer.data = (unsigned long)ap; 5604c6fd2807SJeff Garzik 5605c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 5606c6fd2807SJeff Garzik 56078989805dSTejun Heo ata_link_init(ap, &ap->link, 0); 5608c6fd2807SJeff Garzik 5609c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5610c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 5611c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 5612c6fd2807SJeff Garzik #endif 5613270390e1STejun Heo ata_sff_port_init(ap); 5614270390e1STejun Heo 5615c6fd2807SJeff Garzik return ap; 5616c6fd2807SJeff Garzik } 5617c6fd2807SJeff Garzik 5618f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 5619f0d36efdSTejun Heo { 5620f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 5621f0d36efdSTejun Heo int i; 5622f0d36efdSTejun Heo 5623f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 5624f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 5625f0d36efdSTejun Heo 5626ecef7253STejun Heo if (!ap) 5627ecef7253STejun Heo continue; 5628ecef7253STejun Heo 56294911487aSTejun Heo if (ap->scsi_host) 56301aa506e4STejun Heo scsi_host_put(ap->scsi_host); 56311aa506e4STejun Heo 5632633273a3STejun Heo kfree(ap->pmp_link); 5633b1c72916STejun Heo kfree(ap->slave_link); 56344911487aSTejun Heo kfree(ap); 56351aa506e4STejun Heo host->ports[i] = NULL; 56361aa506e4STejun Heo } 56371aa506e4STejun Heo 56381aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 5639f0d36efdSTejun Heo } 5640f0d36efdSTejun Heo 5641c6fd2807SJeff Garzik /** 5642f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 5643f3187195STejun Heo * @dev: generic device this host is associated with 5644f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 5645f3187195STejun Heo * 5646f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 5647f3187195STejun Heo * this function to allocate a host, initializes it fully and 5648f3187195STejun Heo * attaches it using ata_host_register(). 5649f3187195STejun Heo * 5650f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 5651f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 5652f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 5653f3187195STejun Heo * ports will be automatically freed on registration. 5654f3187195STejun Heo * 5655f3187195STejun Heo * RETURNS: 5656f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 5657f3187195STejun Heo * 5658f3187195STejun Heo * LOCKING: 5659f3187195STejun Heo * Inherited from calling layer (may sleep). 5660f3187195STejun Heo */ 5661f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 5662f3187195STejun Heo { 5663f3187195STejun Heo struct ata_host *host; 5664f3187195STejun Heo size_t sz; 5665f3187195STejun Heo int i; 5666f3187195STejun Heo 5667f3187195STejun Heo DPRINTK("ENTER\n"); 5668f3187195STejun Heo 5669f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 5670f3187195STejun Heo return NULL; 5671f3187195STejun Heo 5672f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 5673f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 5674f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 5675f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 5676f3187195STejun Heo if (!host) 5677f3187195STejun Heo goto err_out; 5678f3187195STejun Heo 5679f3187195STejun Heo devres_add(dev, host); 5680f3187195STejun Heo dev_set_drvdata(dev, host); 5681f3187195STejun Heo 5682f3187195STejun Heo spin_lock_init(&host->lock); 5683f3187195STejun Heo host->dev = dev; 5684f3187195STejun Heo host->n_ports = max_ports; 5685f3187195STejun Heo 5686f3187195STejun Heo /* allocate ports bound to this host */ 5687f3187195STejun Heo for (i = 0; i < max_ports; i++) { 5688f3187195STejun Heo struct ata_port *ap; 5689f3187195STejun Heo 5690f3187195STejun Heo ap = ata_port_alloc(host); 5691f3187195STejun Heo if (!ap) 5692f3187195STejun Heo goto err_out; 5693f3187195STejun Heo 5694f3187195STejun Heo ap->port_no = i; 5695f3187195STejun Heo host->ports[i] = ap; 5696f3187195STejun Heo } 5697f3187195STejun Heo 5698f3187195STejun Heo devres_remove_group(dev, NULL); 5699f3187195STejun Heo return host; 5700f3187195STejun Heo 5701f3187195STejun Heo err_out: 5702f3187195STejun Heo devres_release_group(dev, NULL); 5703f3187195STejun Heo return NULL; 5704f3187195STejun Heo } 5705f3187195STejun Heo 5706f3187195STejun Heo /** 5707f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 5708f5cda257STejun Heo * @dev: generic device this host is associated with 5709f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 5710f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 5711f5cda257STejun Heo * 5712f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 5713f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 5714f5cda257STejun Heo * last entry will be used for the remaining ports. 5715f5cda257STejun Heo * 5716f5cda257STejun Heo * RETURNS: 5717f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 5718f5cda257STejun Heo * 5719f5cda257STejun Heo * LOCKING: 5720f5cda257STejun Heo * Inherited from calling layer (may sleep). 5721f5cda257STejun Heo */ 5722f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5723f5cda257STejun Heo const struct ata_port_info * const * ppi, 5724f5cda257STejun Heo int n_ports) 5725f5cda257STejun Heo { 5726f5cda257STejun Heo const struct ata_port_info *pi; 5727f5cda257STejun Heo struct ata_host *host; 5728f5cda257STejun Heo int i, j; 5729f5cda257STejun Heo 5730f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 5731f5cda257STejun Heo if (!host) 5732f5cda257STejun Heo return NULL; 5733f5cda257STejun Heo 5734f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 5735f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 5736f5cda257STejun Heo 5737f5cda257STejun Heo if (ppi[j]) 5738f5cda257STejun Heo pi = ppi[j++]; 5739f5cda257STejun Heo 5740f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 5741f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 5742f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 5743f5cda257STejun Heo ap->flags |= pi->flags; 57440c88758bSTejun Heo ap->link.flags |= pi->link_flags; 5745f5cda257STejun Heo ap->ops = pi->port_ops; 5746f5cda257STejun Heo 5747f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5748f5cda257STejun Heo host->ops = pi->port_ops; 5749f5cda257STejun Heo } 5750f5cda257STejun Heo 5751f5cda257STejun Heo return host; 5752f5cda257STejun Heo } 5753f5cda257STejun Heo 5754b1c72916STejun Heo /** 5755b1c72916STejun Heo * ata_slave_link_init - initialize slave link 5756b1c72916STejun Heo * @ap: port to initialize slave link for 5757b1c72916STejun Heo * 5758b1c72916STejun Heo * Create and initialize slave link for @ap. This enables slave 5759b1c72916STejun Heo * link handling on the port. 5760b1c72916STejun Heo * 5761b1c72916STejun Heo * In libata, a port contains links and a link contains devices. 5762b1c72916STejun Heo * There is single host link but if a PMP is attached to it, 5763b1c72916STejun Heo * there can be multiple fan-out links. On SATA, there's usually 5764b1c72916STejun Heo * a single device connected to a link but PATA and SATA 5765b1c72916STejun Heo * controllers emulating TF based interface can have two - master 5766b1c72916STejun Heo * and slave. 5767b1c72916STejun Heo * 5768b1c72916STejun Heo * However, there are a few controllers which don't fit into this 5769b1c72916STejun Heo * abstraction too well - SATA controllers which emulate TF 5770b1c72916STejun Heo * interface with both master and slave devices but also have 5771b1c72916STejun Heo * separate SCR register sets for each device. These controllers 5772b1c72916STejun Heo * need separate links for physical link handling 5773b1c72916STejun Heo * (e.g. onlineness, link speed) but should be treated like a 5774b1c72916STejun Heo * traditional M/S controller for everything else (e.g. command 5775b1c72916STejun Heo * issue, softreset). 5776b1c72916STejun Heo * 5777b1c72916STejun Heo * slave_link is libata's way of handling this class of 5778b1c72916STejun Heo * controllers without impacting core layer too much. For 5779b1c72916STejun Heo * anything other than physical link handling, the default host 5780b1c72916STejun Heo * link is used for both master and slave. For physical link 5781b1c72916STejun Heo * handling, separate @ap->slave_link is used. All dirty details 5782b1c72916STejun Heo * are implemented inside libata core layer. From LLD's POV, the 5783b1c72916STejun Heo * only difference is that prereset, hardreset and postreset are 5784b1c72916STejun Heo * called once more for the slave link, so the reset sequence 5785b1c72916STejun Heo * looks like the following. 5786b1c72916STejun Heo * 5787b1c72916STejun Heo * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> 5788b1c72916STejun Heo * softreset(M) -> postreset(M) -> postreset(S) 5789b1c72916STejun Heo * 5790b1c72916STejun Heo * Note that softreset is called only for the master. Softreset 5791b1c72916STejun Heo * resets both M/S by definition, so SRST on master should handle 5792b1c72916STejun Heo * both (the standard method will work just fine). 5793b1c72916STejun Heo * 5794b1c72916STejun Heo * LOCKING: 5795b1c72916STejun Heo * Should be called before host is registered. 5796b1c72916STejun Heo * 5797b1c72916STejun Heo * RETURNS: 5798b1c72916STejun Heo * 0 on success, -errno on failure. 5799b1c72916STejun Heo */ 5800b1c72916STejun Heo int ata_slave_link_init(struct ata_port *ap) 5801b1c72916STejun Heo { 5802b1c72916STejun Heo struct ata_link *link; 5803b1c72916STejun Heo 5804b1c72916STejun Heo WARN_ON(ap->slave_link); 5805b1c72916STejun Heo WARN_ON(ap->flags & ATA_FLAG_PMP); 5806b1c72916STejun Heo 5807b1c72916STejun Heo link = kzalloc(sizeof(*link), GFP_KERNEL); 5808b1c72916STejun Heo if (!link) 5809b1c72916STejun Heo return -ENOMEM; 5810b1c72916STejun Heo 5811b1c72916STejun Heo ata_link_init(ap, link, 1); 5812b1c72916STejun Heo ap->slave_link = link; 5813b1c72916STejun Heo return 0; 5814b1c72916STejun Heo } 5815b1c72916STejun Heo 581632ebbc0cSTejun Heo static void ata_host_stop(struct device *gendev, void *res) 581732ebbc0cSTejun Heo { 581832ebbc0cSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 581932ebbc0cSTejun Heo int i; 582032ebbc0cSTejun Heo 582132ebbc0cSTejun Heo WARN_ON(!(host->flags & ATA_HOST_STARTED)); 582232ebbc0cSTejun Heo 582332ebbc0cSTejun Heo for (i = 0; i < host->n_ports; i++) { 582432ebbc0cSTejun Heo struct ata_port *ap = host->ports[i]; 582532ebbc0cSTejun Heo 582632ebbc0cSTejun Heo if (ap->ops->port_stop) 582732ebbc0cSTejun Heo ap->ops->port_stop(ap); 582832ebbc0cSTejun Heo } 582932ebbc0cSTejun Heo 583032ebbc0cSTejun Heo if (host->ops->host_stop) 583132ebbc0cSTejun Heo host->ops->host_stop(host); 583232ebbc0cSTejun Heo } 583332ebbc0cSTejun Heo 5834f5cda257STejun Heo /** 5835029cfd6bSTejun Heo * ata_finalize_port_ops - finalize ata_port_operations 5836029cfd6bSTejun Heo * @ops: ata_port_operations to finalize 5837029cfd6bSTejun Heo * 5838029cfd6bSTejun Heo * An ata_port_operations can inherit from another ops and that 5839029cfd6bSTejun Heo * ops can again inherit from another. This can go on as many 5840029cfd6bSTejun Heo * times as necessary as long as there is no loop in the 5841029cfd6bSTejun Heo * inheritance chain. 5842029cfd6bSTejun Heo * 5843029cfd6bSTejun Heo * Ops tables are finalized when the host is started. NULL or 5844029cfd6bSTejun Heo * unspecified entries are inherited from the closet ancestor 5845029cfd6bSTejun Heo * which has the method and the entry is populated with it. 5846029cfd6bSTejun Heo * After finalization, the ops table directly points to all the 5847029cfd6bSTejun Heo * methods and ->inherits is no longer necessary and cleared. 5848029cfd6bSTejun Heo * 5849029cfd6bSTejun Heo * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 5850029cfd6bSTejun Heo * 5851029cfd6bSTejun Heo * LOCKING: 5852029cfd6bSTejun Heo * None. 5853029cfd6bSTejun Heo */ 5854029cfd6bSTejun Heo static void ata_finalize_port_ops(struct ata_port_operations *ops) 5855029cfd6bSTejun Heo { 58562da67659SPradeep Singh Rautela static DEFINE_SPINLOCK(lock); 5857029cfd6bSTejun Heo const struct ata_port_operations *cur; 5858029cfd6bSTejun Heo void **begin = (void **)ops; 5859029cfd6bSTejun Heo void **end = (void **)&ops->inherits; 5860029cfd6bSTejun Heo void **pp; 5861029cfd6bSTejun Heo 5862029cfd6bSTejun Heo if (!ops || !ops->inherits) 5863029cfd6bSTejun Heo return; 5864029cfd6bSTejun Heo 5865029cfd6bSTejun Heo spin_lock(&lock); 5866029cfd6bSTejun Heo 5867029cfd6bSTejun Heo for (cur = ops->inherits; cur; cur = cur->inherits) { 5868029cfd6bSTejun Heo void **inherit = (void **)cur; 5869029cfd6bSTejun Heo 5870029cfd6bSTejun Heo for (pp = begin; pp < end; pp++, inherit++) 5871029cfd6bSTejun Heo if (!*pp) 5872029cfd6bSTejun Heo *pp = *inherit; 5873029cfd6bSTejun Heo } 5874029cfd6bSTejun Heo 5875029cfd6bSTejun Heo for (pp = begin; pp < end; pp++) 5876029cfd6bSTejun Heo if (IS_ERR(*pp)) 5877029cfd6bSTejun Heo *pp = NULL; 5878029cfd6bSTejun Heo 5879029cfd6bSTejun Heo ops->inherits = NULL; 5880029cfd6bSTejun Heo 5881029cfd6bSTejun Heo spin_unlock(&lock); 5882029cfd6bSTejun Heo } 5883029cfd6bSTejun Heo 5884029cfd6bSTejun Heo /** 5885ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 5886ecef7253STejun Heo * @host: ATA host to start ports for 5887ecef7253STejun Heo * 5888ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 5889ecef7253STejun Heo * recorded in host->flags, so this function can be called 5890ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 5891f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 5892f3187195STejun Heo * first non-dummy port ops. 5893ecef7253STejun Heo * 5894ecef7253STejun Heo * LOCKING: 5895ecef7253STejun Heo * Inherited from calling layer (may sleep). 5896ecef7253STejun Heo * 5897ecef7253STejun Heo * RETURNS: 5898ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 5899ecef7253STejun Heo */ 5900ecef7253STejun Heo int ata_host_start(struct ata_host *host) 5901ecef7253STejun Heo { 590232ebbc0cSTejun Heo int have_stop = 0; 590332ebbc0cSTejun Heo void *start_dr = NULL; 5904ecef7253STejun Heo int i, rc; 5905ecef7253STejun Heo 5906ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 5907ecef7253STejun Heo return 0; 5908ecef7253STejun Heo 5909029cfd6bSTejun Heo ata_finalize_port_ops(host->ops); 5910029cfd6bSTejun Heo 5911ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 5912ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 5913ecef7253STejun Heo 5914029cfd6bSTejun Heo ata_finalize_port_ops(ap->ops); 5915029cfd6bSTejun Heo 5916f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 5917f3187195STejun Heo host->ops = ap->ops; 5918f3187195STejun Heo 591932ebbc0cSTejun Heo if (ap->ops->port_stop) 592032ebbc0cSTejun Heo have_stop = 1; 592132ebbc0cSTejun Heo } 592232ebbc0cSTejun Heo 592332ebbc0cSTejun Heo if (host->ops->host_stop) 592432ebbc0cSTejun Heo have_stop = 1; 592532ebbc0cSTejun Heo 592632ebbc0cSTejun Heo if (have_stop) { 592732ebbc0cSTejun Heo start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 592832ebbc0cSTejun Heo if (!start_dr) 592932ebbc0cSTejun Heo return -ENOMEM; 593032ebbc0cSTejun Heo } 593132ebbc0cSTejun Heo 593232ebbc0cSTejun Heo for (i = 0; i < host->n_ports; i++) { 593332ebbc0cSTejun Heo struct ata_port *ap = host->ports[i]; 593432ebbc0cSTejun Heo 5935ecef7253STejun Heo if (ap->ops->port_start) { 5936ecef7253STejun Heo rc = ap->ops->port_start(ap); 5937ecef7253STejun Heo if (rc) { 59380f9fe9b7SAlan Cox if (rc != -ENODEV) 59390f757743SAndrew Morton dev_printk(KERN_ERR, host->dev, 59400f757743SAndrew Morton "failed to start port %d " 59410f757743SAndrew Morton "(errno=%d)\n", i, rc); 5942ecef7253STejun Heo goto err_out; 5943ecef7253STejun Heo } 5944ecef7253STejun Heo } 5945ecef7253STejun Heo ata_eh_freeze_port(ap); 5946ecef7253STejun Heo } 5947ecef7253STejun Heo 594832ebbc0cSTejun Heo if (start_dr) 594932ebbc0cSTejun Heo devres_add(host->dev, start_dr); 5950ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 5951ecef7253STejun Heo return 0; 5952ecef7253STejun Heo 5953ecef7253STejun Heo err_out: 5954ecef7253STejun Heo while (--i >= 0) { 5955ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 5956ecef7253STejun Heo 5957ecef7253STejun Heo if (ap->ops->port_stop) 5958ecef7253STejun Heo ap->ops->port_stop(ap); 5959ecef7253STejun Heo } 596032ebbc0cSTejun Heo devres_free(start_dr); 5961ecef7253STejun Heo return rc; 5962ecef7253STejun Heo } 5963ecef7253STejun Heo 5964ecef7253STejun Heo /** 5965cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 5966cca3974eSJeff Garzik * @host: host to initialize 5967cca3974eSJeff Garzik * @dev: device host is attached to 5968cca3974eSJeff Garzik * @flags: host flags 5969c6fd2807SJeff Garzik * @ops: port_ops 5970c6fd2807SJeff Garzik * 5971c6fd2807SJeff Garzik * LOCKING: 5972c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5973c6fd2807SJeff Garzik * 5974c6fd2807SJeff Garzik */ 5975f3187195STejun Heo /* KILLME - the only user left is ipr */ 5976cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 5977029cfd6bSTejun Heo unsigned long flags, struct ata_port_operations *ops) 5978c6fd2807SJeff Garzik { 5979cca3974eSJeff Garzik spin_lock_init(&host->lock); 5980cca3974eSJeff Garzik host->dev = dev; 5981cca3974eSJeff Garzik host->flags = flags; 5982cca3974eSJeff Garzik host->ops = ops; 5983c6fd2807SJeff Garzik } 5984c6fd2807SJeff Garzik 598579318057SArjan van de Ven 598679318057SArjan van de Ven static void async_port_probe(void *data, async_cookie_t cookie) 598779318057SArjan van de Ven { 598879318057SArjan van de Ven int rc; 598979318057SArjan van de Ven struct ata_port *ap = data; 5990886ad09fSArjan van de Ven 5991886ad09fSArjan van de Ven /* 5992886ad09fSArjan van de Ven * If we're not allowed to scan this host in parallel, 5993886ad09fSArjan van de Ven * we need to wait until all previous scans have completed 5994886ad09fSArjan van de Ven * before going further. 5995fa853a48SArjan van de Ven * Jeff Garzik says this is only within a controller, so we 5996fa853a48SArjan van de Ven * don't need to wait for port 0, only for later ports. 5997886ad09fSArjan van de Ven */ 5998fa853a48SArjan van de Ven if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) 5999886ad09fSArjan van de Ven async_synchronize_cookie(cookie); 6000886ad09fSArjan van de Ven 600179318057SArjan van de Ven /* probe */ 600279318057SArjan van de Ven if (ap->ops->error_handler) { 600379318057SArjan van de Ven struct ata_eh_info *ehi = &ap->link.eh_info; 600479318057SArjan van de Ven unsigned long flags; 600579318057SArjan van de Ven 600679318057SArjan van de Ven /* kick EH for boot probing */ 600779318057SArjan van de Ven spin_lock_irqsave(ap->lock, flags); 600879318057SArjan van de Ven 600979318057SArjan van de Ven ehi->probe_mask |= ATA_ALL_DEVICES; 601079318057SArjan van de Ven ehi->action |= ATA_EH_RESET | ATA_EH_LPM; 601179318057SArjan van de Ven ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 601279318057SArjan van de Ven 601379318057SArjan van de Ven ap->pflags &= ~ATA_PFLAG_INITIALIZING; 601479318057SArjan van de Ven ap->pflags |= ATA_PFLAG_LOADING; 601579318057SArjan van de Ven ata_port_schedule_eh(ap); 601679318057SArjan van de Ven 601779318057SArjan van de Ven spin_unlock_irqrestore(ap->lock, flags); 601879318057SArjan van de Ven 601979318057SArjan van de Ven /* wait for EH to finish */ 602079318057SArjan van de Ven ata_port_wait_eh(ap); 602179318057SArjan van de Ven } else { 602279318057SArjan van de Ven DPRINTK("ata%u: bus probe begin\n", ap->print_id); 602379318057SArjan van de Ven rc = ata_bus_probe(ap); 602479318057SArjan van de Ven DPRINTK("ata%u: bus probe end\n", ap->print_id); 602579318057SArjan van de Ven 602679318057SArjan van de Ven if (rc) { 602779318057SArjan van de Ven /* FIXME: do something useful here? 602879318057SArjan van de Ven * Current libata behavior will 602979318057SArjan van de Ven * tear down everything when 603079318057SArjan van de Ven * the module is removed 603179318057SArjan van de Ven * or the h/w is unplugged. 603279318057SArjan van de Ven */ 603379318057SArjan van de Ven } 603479318057SArjan van de Ven } 6035f29d3b23SArjan van de Ven 6036f29d3b23SArjan van de Ven /* in order to keep device order, we need to synchronize at this point */ 6037f29d3b23SArjan van de Ven async_synchronize_cookie(cookie); 6038f29d3b23SArjan van de Ven 6039f29d3b23SArjan van de Ven ata_scsi_scan_host(ap, 1); 6040f29d3b23SArjan van de Ven 604179318057SArjan van de Ven } 6042c6fd2807SJeff Garzik /** 6043f3187195STejun Heo * ata_host_register - register initialized ATA host 6044f3187195STejun Heo * @host: ATA host to register 6045f3187195STejun Heo * @sht: template for SCSI host 6046c6fd2807SJeff Garzik * 6047f3187195STejun Heo * Register initialized ATA host. @host is allocated using 6048f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 6049f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 6050f3187195STejun Heo * probe registered devices. 6051c6fd2807SJeff Garzik * 6052c6fd2807SJeff Garzik * LOCKING: 6053f3187195STejun Heo * Inherited from calling layer (may sleep). 6054c6fd2807SJeff Garzik * 6055c6fd2807SJeff Garzik * RETURNS: 6056f3187195STejun Heo * 0 on success, -errno otherwise. 6057c6fd2807SJeff Garzik */ 6058f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 6059c6fd2807SJeff Garzik { 6060f3187195STejun Heo int i, rc; 6061c6fd2807SJeff Garzik 6062f3187195STejun Heo /* host must have been started */ 6063f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 6064f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 6065f3187195STejun Heo "BUG: trying to register unstarted host\n"); 6066f3187195STejun Heo WARN_ON(1); 6067f3187195STejun Heo return -EINVAL; 606802f076aaSAlan Cox } 6069f0d36efdSTejun Heo 6070f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 6071f3187195STejun Heo * determine the exact number of ports to allocate at 6072f3187195STejun Heo * allocation time. 6073f3187195STejun Heo */ 6074f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 6075f3187195STejun Heo kfree(host->ports[i]); 6076f0d36efdSTejun Heo 6077f3187195STejun Heo /* give ports names and add SCSI hosts */ 6078f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 6079f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 6080c6fd2807SJeff Garzik 6081f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 6082ecef7253STejun Heo if (rc) 6083f3187195STejun Heo return rc; 6084ecef7253STejun Heo 6085fafbae87STejun Heo /* associate with ACPI nodes */ 6086fafbae87STejun Heo ata_acpi_associate(host); 6087fafbae87STejun Heo 6088f3187195STejun Heo /* set cable, sata_spd_limit and report */ 6089cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6090cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6091f3187195STejun Heo unsigned long xfer_mask; 6092f3187195STejun Heo 6093f3187195STejun Heo /* set SATA cable type if still unset */ 6094f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6095f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 6096c6fd2807SJeff Garzik 6097c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 60984fb37a25STejun Heo sata_link_init_spd(&ap->link); 6099b1c72916STejun Heo if (ap->slave_link) 6100b1c72916STejun Heo sata_link_init_spd(ap->slave_link); 6101c6fd2807SJeff Garzik 6102cbcdd875STejun Heo /* print per-port info to dmesg */ 6103f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6104f3187195STejun Heo ap->udma_mask); 6105f3187195STejun Heo 6106abf6e8edSTejun Heo if (!ata_port_is_dummy(ap)) { 6107cbcdd875STejun Heo ata_port_printk(ap, KERN_INFO, 6108cbcdd875STejun Heo "%cATA max %s %s\n", 6109a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6110f3187195STejun Heo ata_mode_string(xfer_mask), 6111cbcdd875STejun Heo ap->link.eh_info.desc); 6112abf6e8edSTejun Heo ata_ehi_clear_desc(&ap->link.eh_info); 6113abf6e8edSTejun Heo } else 6114f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 6115c6fd2807SJeff Garzik } 6116c6fd2807SJeff Garzik 6117f6005354SVegard Nossum /* perform each probe asynchronously */ 6118f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 6119f3187195STejun Heo struct ata_port *ap = host->ports[i]; 612079318057SArjan van de Ven async_schedule(async_port_probe, ap); 6121c6fd2807SJeff Garzik } 6122c6fd2807SJeff Garzik 6123f3187195STejun Heo return 0; 6124f3187195STejun Heo } 6125f3187195STejun Heo 6126f3187195STejun Heo /** 6127f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 6128f5cda257STejun Heo * @host: target ATA host 6129f5cda257STejun Heo * @irq: IRQ to request 6130f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 6131f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 6132f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 6133f5cda257STejun Heo * 6134f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 6135f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 6136f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 6137f5cda257STejun Heo * arguments and performs the three steps in one go. 6138f5cda257STejun Heo * 61393d46b2e2SPaul Mundt * An invalid IRQ skips the IRQ registration and expects the host to 61403d46b2e2SPaul Mundt * have set polling mode on the port. In this case, @irq_handler 61413d46b2e2SPaul Mundt * should be NULL. 61423d46b2e2SPaul Mundt * 6143f5cda257STejun Heo * LOCKING: 6144f5cda257STejun Heo * Inherited from calling layer (may sleep). 6145f5cda257STejun Heo * 6146f5cda257STejun Heo * RETURNS: 6147f5cda257STejun Heo * 0 on success, -errno otherwise. 6148f5cda257STejun Heo */ 6149f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 6150f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 6151f5cda257STejun Heo struct scsi_host_template *sht) 6152f5cda257STejun Heo { 6153cbcdd875STejun Heo int i, rc; 6154f5cda257STejun Heo 6155f5cda257STejun Heo rc = ata_host_start(host); 6156f5cda257STejun Heo if (rc) 6157f5cda257STejun Heo return rc; 6158f5cda257STejun Heo 61593d46b2e2SPaul Mundt /* Special case for polling mode */ 61603d46b2e2SPaul Mundt if (!irq) { 61613d46b2e2SPaul Mundt WARN_ON(irq_handler); 61623d46b2e2SPaul Mundt return ata_host_register(host, sht); 61633d46b2e2SPaul Mundt } 61643d46b2e2SPaul Mundt 6165f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6166f5cda257STejun Heo dev_driver_string(host->dev), host); 6167f5cda257STejun Heo if (rc) 6168f5cda257STejun Heo return rc; 6169f5cda257STejun Heo 6170cbcdd875STejun Heo for (i = 0; i < host->n_ports; i++) 6171cbcdd875STejun Heo ata_port_desc(host->ports[i], "irq %d", irq); 61724031826bSTejun Heo 6173f5cda257STejun Heo rc = ata_host_register(host, sht); 6174f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 6175f5cda257STejun Heo if (rc) 6176f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 6177f5cda257STejun Heo 6178f5cda257STejun Heo return rc; 6179f5cda257STejun Heo } 6180f5cda257STejun Heo 6181f5cda257STejun Heo /** 6182c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 6183c6fd2807SJeff Garzik * @ap: ATA port to be detached 6184c6fd2807SJeff Garzik * 6185c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 6186c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 6187c6fd2807SJeff Garzik * be quiescent on return from this function. 6188c6fd2807SJeff Garzik * 6189c6fd2807SJeff Garzik * LOCKING: 6190c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6191c6fd2807SJeff Garzik */ 6192741b7763SAdrian Bunk static void ata_port_detach(struct ata_port *ap) 6193c6fd2807SJeff Garzik { 6194c6fd2807SJeff Garzik unsigned long flags; 6195c6fd2807SJeff Garzik 6196c6fd2807SJeff Garzik if (!ap->ops->error_handler) 6197c6fd2807SJeff Garzik goto skip_eh; 6198c6fd2807SJeff Garzik 6199c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 6200c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6201c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 6202ece180d1STejun Heo ata_port_schedule_eh(ap); 6203c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6204c6fd2807SJeff Garzik 6205ece180d1STejun Heo /* wait till EH commits suicide */ 6206c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6207c6fd2807SJeff Garzik 6208ece180d1STejun Heo /* it better be dead now */ 6209ece180d1STejun Heo WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); 6210c6fd2807SJeff Garzik 621145a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 6212c6fd2807SJeff Garzik 6213c6fd2807SJeff Garzik skip_eh: 6214c6fd2807SJeff Garzik /* remove the associated SCSI host */ 6215cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 6216c6fd2807SJeff Garzik } 6217c6fd2807SJeff Garzik 6218c6fd2807SJeff Garzik /** 62190529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 62200529c159STejun Heo * @host: Host to detach 62210529c159STejun Heo * 62220529c159STejun Heo * Detach all ports of @host. 62230529c159STejun Heo * 62240529c159STejun Heo * LOCKING: 62250529c159STejun Heo * Kernel thread context (may sleep). 62260529c159STejun Heo */ 62270529c159STejun Heo void ata_host_detach(struct ata_host *host) 62280529c159STejun Heo { 62290529c159STejun Heo int i; 62300529c159STejun Heo 62310529c159STejun Heo for (i = 0; i < host->n_ports; i++) 62320529c159STejun Heo ata_port_detach(host->ports[i]); 6233562f0c2dSTejun Heo 6234562f0c2dSTejun Heo /* the host is dead now, dissociate ACPI */ 6235562f0c2dSTejun Heo ata_acpi_dissociate(host); 62360529c159STejun Heo } 62370529c159STejun Heo 6238c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6239c6fd2807SJeff Garzik 6240c6fd2807SJeff Garzik /** 6241c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6242c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6243c6fd2807SJeff Garzik * 6244b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6245b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6246b878ca5dSTejun Heo * release is handled via devres. 6247c6fd2807SJeff Garzik * 6248c6fd2807SJeff Garzik * LOCKING: 6249c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6250c6fd2807SJeff Garzik */ 6251c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6252c6fd2807SJeff Garzik { 62532855568bSJeff Garzik struct device *dev = &pdev->dev; 6254cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6255c6fd2807SJeff Garzik 6256f0d36efdSTejun Heo ata_host_detach(host); 6257c6fd2807SJeff Garzik } 6258c6fd2807SJeff Garzik 6259c6fd2807SJeff Garzik /* move to PCI subsystem */ 6260c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6261c6fd2807SJeff Garzik { 6262c6fd2807SJeff Garzik unsigned long tmp = 0; 6263c6fd2807SJeff Garzik 6264c6fd2807SJeff Garzik switch (bits->width) { 6265c6fd2807SJeff Garzik case 1: { 6266c6fd2807SJeff Garzik u8 tmp8 = 0; 6267c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6268c6fd2807SJeff Garzik tmp = tmp8; 6269c6fd2807SJeff Garzik break; 6270c6fd2807SJeff Garzik } 6271c6fd2807SJeff Garzik case 2: { 6272c6fd2807SJeff Garzik u16 tmp16 = 0; 6273c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6274c6fd2807SJeff Garzik tmp = tmp16; 6275c6fd2807SJeff Garzik break; 6276c6fd2807SJeff Garzik } 6277c6fd2807SJeff Garzik case 4: { 6278c6fd2807SJeff Garzik u32 tmp32 = 0; 6279c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6280c6fd2807SJeff Garzik tmp = tmp32; 6281c6fd2807SJeff Garzik break; 6282c6fd2807SJeff Garzik } 6283c6fd2807SJeff Garzik 6284c6fd2807SJeff Garzik default: 6285c6fd2807SJeff Garzik return -EINVAL; 6286c6fd2807SJeff Garzik } 6287c6fd2807SJeff Garzik 6288c6fd2807SJeff Garzik tmp &= bits->mask; 6289c6fd2807SJeff Garzik 6290c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6291c6fd2807SJeff Garzik } 6292c6fd2807SJeff Garzik 62936ffa01d8STejun Heo #ifdef CONFIG_PM 6294c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6295c6fd2807SJeff Garzik { 6296c6fd2807SJeff Garzik pci_save_state(pdev); 6297c6fd2807SJeff Garzik pci_disable_device(pdev); 62984c90d971STejun Heo 62993a2d5b70SRafael J. Wysocki if (mesg.event & PM_EVENT_SLEEP) 6300c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6301c6fd2807SJeff Garzik } 6302c6fd2807SJeff Garzik 6303553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6304c6fd2807SJeff Garzik { 6305553c4aa6STejun Heo int rc; 6306553c4aa6STejun Heo 6307c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6308c6fd2807SJeff Garzik pci_restore_state(pdev); 6309553c4aa6STejun Heo 6310f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6311553c4aa6STejun Heo if (rc) { 6312553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6313553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6314553c4aa6STejun Heo return rc; 6315553c4aa6STejun Heo } 6316553c4aa6STejun Heo 6317c6fd2807SJeff Garzik pci_set_master(pdev); 6318553c4aa6STejun Heo return 0; 6319c6fd2807SJeff Garzik } 6320c6fd2807SJeff Garzik 6321c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6322c6fd2807SJeff Garzik { 6323cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6324c6fd2807SJeff Garzik int rc = 0; 6325c6fd2807SJeff Garzik 6326cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6327c6fd2807SJeff Garzik if (rc) 6328c6fd2807SJeff Garzik return rc; 6329c6fd2807SJeff Garzik 6330c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6331c6fd2807SJeff Garzik 6332c6fd2807SJeff Garzik return 0; 6333c6fd2807SJeff Garzik } 6334c6fd2807SJeff Garzik 6335c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6336c6fd2807SJeff Garzik { 6337cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6338553c4aa6STejun Heo int rc; 6339c6fd2807SJeff Garzik 6340553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6341553c4aa6STejun Heo if (rc == 0) 6342cca3974eSJeff Garzik ata_host_resume(host); 6343553c4aa6STejun Heo return rc; 6344c6fd2807SJeff Garzik } 63456ffa01d8STejun Heo #endif /* CONFIG_PM */ 63466ffa01d8STejun Heo 6347c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6348c6fd2807SJeff Garzik 634933267325STejun Heo static int __init ata_parse_force_one(char **cur, 635033267325STejun Heo struct ata_force_ent *force_ent, 635133267325STejun Heo const char **reason) 635233267325STejun Heo { 635333267325STejun Heo /* FIXME: Currently, there's no way to tag init const data and 635433267325STejun Heo * using __initdata causes build failure on some versions of 635533267325STejun Heo * gcc. Once __initdataconst is implemented, add const to the 635633267325STejun Heo * following structure. 635733267325STejun Heo */ 635833267325STejun Heo static struct ata_force_param force_tbl[] __initdata = { 635933267325STejun Heo { "40c", .cbl = ATA_CBL_PATA40 }, 636033267325STejun Heo { "80c", .cbl = ATA_CBL_PATA80 }, 636133267325STejun Heo { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, 636233267325STejun Heo { "unk", .cbl = ATA_CBL_PATA_UNK }, 636333267325STejun Heo { "ign", .cbl = ATA_CBL_PATA_IGN }, 636433267325STejun Heo { "sata", .cbl = ATA_CBL_SATA }, 636533267325STejun Heo { "1.5Gbps", .spd_limit = 1 }, 636633267325STejun Heo { "3.0Gbps", .spd_limit = 2 }, 636733267325STejun Heo { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, 636833267325STejun Heo { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, 636943c9c591STejun Heo { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID }, 637033267325STejun Heo { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, 637133267325STejun Heo { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, 637233267325STejun Heo { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, 637333267325STejun Heo { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, 637433267325STejun Heo { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, 637533267325STejun Heo { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, 637633267325STejun Heo { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, 637733267325STejun Heo { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, 637833267325STejun Heo { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, 637933267325STejun Heo { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, 638033267325STejun Heo { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, 638133267325STejun Heo { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, 638233267325STejun Heo { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 638333267325STejun Heo { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 638433267325STejun Heo { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 638533267325STejun Heo { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 638633267325STejun Heo { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 638733267325STejun Heo { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 638833267325STejun Heo { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 638933267325STejun Heo { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 639033267325STejun Heo { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 639133267325STejun Heo { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 639233267325STejun Heo { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 639333267325STejun Heo { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 639433267325STejun Heo { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 639533267325STejun Heo { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 639633267325STejun Heo { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 639733267325STejun Heo { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 639833267325STejun Heo { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 639933267325STejun Heo { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 640033267325STejun Heo { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 640133267325STejun Heo { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 640233267325STejun Heo { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 640333267325STejun Heo { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, 640405944bdfSTejun Heo { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, 640505944bdfSTejun Heo { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, 640605944bdfSTejun Heo { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, 640733267325STejun Heo }; 640833267325STejun Heo char *start = *cur, *p = *cur; 640933267325STejun Heo char *id, *val, *endp; 641033267325STejun Heo const struct ata_force_param *match_fp = NULL; 641133267325STejun Heo int nr_matches = 0, i; 641233267325STejun Heo 641333267325STejun Heo /* find where this param ends and update *cur */ 641433267325STejun Heo while (*p != '\0' && *p != ',') 641533267325STejun Heo p++; 641633267325STejun Heo 641733267325STejun Heo if (*p == '\0') 641833267325STejun Heo *cur = p; 641933267325STejun Heo else 642033267325STejun Heo *cur = p + 1; 642133267325STejun Heo 642233267325STejun Heo *p = '\0'; 642333267325STejun Heo 642433267325STejun Heo /* parse */ 642533267325STejun Heo p = strchr(start, ':'); 642633267325STejun Heo if (!p) { 642733267325STejun Heo val = strstrip(start); 642833267325STejun Heo goto parse_val; 642933267325STejun Heo } 643033267325STejun Heo *p = '\0'; 643133267325STejun Heo 643233267325STejun Heo id = strstrip(start); 643333267325STejun Heo val = strstrip(p + 1); 643433267325STejun Heo 643533267325STejun Heo /* parse id */ 643633267325STejun Heo p = strchr(id, '.'); 643733267325STejun Heo if (p) { 643833267325STejun Heo *p++ = '\0'; 643933267325STejun Heo force_ent->device = simple_strtoul(p, &endp, 10); 644033267325STejun Heo if (p == endp || *endp != '\0') { 644133267325STejun Heo *reason = "invalid device"; 644233267325STejun Heo return -EINVAL; 644333267325STejun Heo } 644433267325STejun Heo } 644533267325STejun Heo 644633267325STejun Heo force_ent->port = simple_strtoul(id, &endp, 10); 644733267325STejun Heo if (p == endp || *endp != '\0') { 644833267325STejun Heo *reason = "invalid port/link"; 644933267325STejun Heo return -EINVAL; 645033267325STejun Heo } 645133267325STejun Heo 645233267325STejun Heo parse_val: 645333267325STejun Heo /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ 645433267325STejun Heo for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 645533267325STejun Heo const struct ata_force_param *fp = &force_tbl[i]; 645633267325STejun Heo 645733267325STejun Heo if (strncasecmp(val, fp->name, strlen(val))) 645833267325STejun Heo continue; 645933267325STejun Heo 646033267325STejun Heo nr_matches++; 646133267325STejun Heo match_fp = fp; 646233267325STejun Heo 646333267325STejun Heo if (strcasecmp(val, fp->name) == 0) { 646433267325STejun Heo nr_matches = 1; 646533267325STejun Heo break; 646633267325STejun Heo } 646733267325STejun Heo } 646833267325STejun Heo 646933267325STejun Heo if (!nr_matches) { 647033267325STejun Heo *reason = "unknown value"; 647133267325STejun Heo return -EINVAL; 647233267325STejun Heo } 647333267325STejun Heo if (nr_matches > 1) { 647433267325STejun Heo *reason = "ambigious value"; 647533267325STejun Heo return -EINVAL; 647633267325STejun Heo } 647733267325STejun Heo 647833267325STejun Heo force_ent->param = *match_fp; 647933267325STejun Heo 648033267325STejun Heo return 0; 648133267325STejun Heo } 648233267325STejun Heo 648333267325STejun Heo static void __init ata_parse_force_param(void) 648433267325STejun Heo { 648533267325STejun Heo int idx = 0, size = 1; 648633267325STejun Heo int last_port = -1, last_device = -1; 648733267325STejun Heo char *p, *cur, *next; 648833267325STejun Heo 648933267325STejun Heo /* calculate maximum number of params and allocate force_tbl */ 649033267325STejun Heo for (p = ata_force_param_buf; *p; p++) 649133267325STejun Heo if (*p == ',') 649233267325STejun Heo size++; 649333267325STejun Heo 649433267325STejun Heo ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); 649533267325STejun Heo if (!ata_force_tbl) { 649633267325STejun Heo printk(KERN_WARNING "ata: failed to extend force table, " 649733267325STejun Heo "libata.force ignored\n"); 649833267325STejun Heo return; 649933267325STejun Heo } 650033267325STejun Heo 650133267325STejun Heo /* parse and populate the table */ 650233267325STejun Heo for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 650333267325STejun Heo const char *reason = ""; 650433267325STejun Heo struct ata_force_ent te = { .port = -1, .device = -1 }; 650533267325STejun Heo 650633267325STejun Heo next = cur; 650733267325STejun Heo if (ata_parse_force_one(&next, &te, &reason)) { 650833267325STejun Heo printk(KERN_WARNING "ata: failed to parse force " 650933267325STejun Heo "parameter \"%s\" (%s)\n", 651033267325STejun Heo cur, reason); 651133267325STejun Heo continue; 651233267325STejun Heo } 651333267325STejun Heo 651433267325STejun Heo if (te.port == -1) { 651533267325STejun Heo te.port = last_port; 651633267325STejun Heo te.device = last_device; 651733267325STejun Heo } 651833267325STejun Heo 651933267325STejun Heo ata_force_tbl[idx++] = te; 652033267325STejun Heo 652133267325STejun Heo last_port = te.port; 652233267325STejun Heo last_device = te.device; 652333267325STejun Heo } 652433267325STejun Heo 652533267325STejun Heo ata_force_tbl_size = idx; 652633267325STejun Heo } 6527c6fd2807SJeff Garzik 6528c6fd2807SJeff Garzik static int __init ata_init(void) 6529c6fd2807SJeff Garzik { 6530270390e1STejun Heo int rc = -ENOMEM; 6531270390e1STejun Heo 653233267325STejun Heo ata_parse_force_param(); 653333267325STejun Heo 6534270390e1STejun Heo rc = ata_sff_init(); 6535ad72cf98STejun Heo if (rc) { 6536ad72cf98STejun Heo kfree(ata_force_tbl); 6537ad72cf98STejun Heo return rc; 6538ad72cf98STejun Heo } 6539c6fd2807SJeff Garzik 6540c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6541c6fd2807SJeff Garzik return 0; 6542c6fd2807SJeff Garzik } 6543c6fd2807SJeff Garzik 6544c6fd2807SJeff Garzik static void __exit ata_exit(void) 6545c6fd2807SJeff Garzik { 6546270390e1STejun Heo ata_sff_exit(); 654733267325STejun Heo kfree(ata_force_tbl); 6548c6fd2807SJeff Garzik } 6549c6fd2807SJeff Garzik 6550a4625085SBrian King subsys_initcall(ata_init); 6551c6fd2807SJeff Garzik module_exit(ata_exit); 6552c6fd2807SJeff Garzik 65539990b6f3SAkinobu Mita static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); 6554c6fd2807SJeff Garzik 6555c6fd2807SJeff Garzik int ata_ratelimit(void) 6556c6fd2807SJeff Garzik { 65579990b6f3SAkinobu Mita return __ratelimit(&ratelimit); 6558c6fd2807SJeff Garzik } 6559c6fd2807SJeff Garzik 6560c6fd2807SJeff Garzik /** 6561c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6562c6fd2807SJeff Garzik * @reg: IO-mapped register 6563c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6564c6fd2807SJeff Garzik * @val: Wait condition 6565341c2c95STejun Heo * @interval: polling interval in milliseconds 6566341c2c95STejun Heo * @timeout: timeout in milliseconds 6567c6fd2807SJeff Garzik * 6568c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6569c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6570c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6571c6fd2807SJeff Garzik * 6572c6fd2807SJeff Garzik * (*@reg & mask) != val 6573c6fd2807SJeff Garzik * 6574c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6575c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6576c6fd2807SJeff Garzik * 6577c6fd2807SJeff Garzik * LOCKING: 6578c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6579c6fd2807SJeff Garzik * 6580c6fd2807SJeff Garzik * RETURNS: 6581c6fd2807SJeff Garzik * The final register value. 6582c6fd2807SJeff Garzik */ 6583c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6584341c2c95STejun Heo unsigned long interval, unsigned long timeout) 6585c6fd2807SJeff Garzik { 6586341c2c95STejun Heo unsigned long deadline; 6587c6fd2807SJeff Garzik u32 tmp; 6588c6fd2807SJeff Garzik 6589c6fd2807SJeff Garzik tmp = ioread32(reg); 6590c6fd2807SJeff Garzik 6591c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6592c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6593c6fd2807SJeff Garzik * eat away the timeout. 6594c6fd2807SJeff Garzik */ 6595341c2c95STejun Heo deadline = ata_deadline(jiffies, timeout); 6596c6fd2807SJeff Garzik 6597341c2c95STejun Heo while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6598341c2c95STejun Heo msleep(interval); 6599c6fd2807SJeff Garzik tmp = ioread32(reg); 6600c6fd2807SJeff Garzik } 6601c6fd2807SJeff Garzik 6602c6fd2807SJeff Garzik return tmp; 6603c6fd2807SJeff Garzik } 6604c6fd2807SJeff Garzik 6605c6fd2807SJeff Garzik /* 6606c6fd2807SJeff Garzik * Dummy port_ops 6607c6fd2807SJeff Garzik */ 6608c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6609c6fd2807SJeff Garzik { 6610c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6611c6fd2807SJeff Garzik } 6612c6fd2807SJeff Garzik 6613182d7bbaSTejun Heo static void ata_dummy_error_handler(struct ata_port *ap) 6614182d7bbaSTejun Heo { 6615182d7bbaSTejun Heo /* truly dummy */ 6616182d7bbaSTejun Heo } 6617182d7bbaSTejun Heo 6618029cfd6bSTejun Heo struct ata_port_operations ata_dummy_port_ops = { 6619c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6620c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6621182d7bbaSTejun Heo .error_handler = ata_dummy_error_handler, 6622c6fd2807SJeff Garzik }; 6623c6fd2807SJeff Garzik 662421b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 662521b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 662621b0ad4fSTejun Heo }; 662721b0ad4fSTejun Heo 6628c6fd2807SJeff Garzik /* 6629c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6630c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6631c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6632c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6633c6fd2807SJeff Garzik */ 6634c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6635c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6636c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6637029cfd6bSTejun Heo EXPORT_SYMBOL_GPL(ata_base_port_ops); 6638029cfd6bSTejun Heo EXPORT_SYMBOL_GPL(sata_port_ops); 6639c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 664021b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 66411eca4365STejun Heo EXPORT_SYMBOL_GPL(ata_link_next); 66421eca4365STejun Heo EXPORT_SYMBOL_GPL(ata_dev_next); 6643c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6644d8d9129eSTejun Heo EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 6645cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6646f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 6647f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6648b1c72916STejun Heo EXPORT_SYMBOL_GPL(ata_slave_link_init); 6649ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 6650f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 6651f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 66520529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6653c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6654c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6655c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6656436d34b3STejun Heo EXPORT_SYMBOL_GPL(atapi_cmd_type); 6657c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6658c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 66596357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_pack_xfermask); 66606357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_unpack_xfermask); 66616357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 66626357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 66636357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 66646357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_mode_string); 66656357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_id_xfermask); 666604351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 666731cc23b3STejun Heo EXPORT_SYMBOL_GPL(ata_std_qc_defer); 6668c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 666910305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 6670c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6671aa2731adSTejun Heo EXPORT_SYMBOL_GPL(ata_wait_after_reset); 6672936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_debounce); 6673936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_resume); 66740aa1113dSTejun Heo EXPORT_SYMBOL_GPL(ata_std_prereset); 6675cc0680a5STejun Heo EXPORT_SYMBOL_GPL(sata_link_hardreset); 667657c9efdfSTejun Heo EXPORT_SYMBOL_GPL(sata_std_hardreset); 6677203c75b8STejun Heo EXPORT_SYMBOL_GPL(ata_std_postreset); 6678c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6679c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6680c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6681c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6682c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6683c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6684c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6685c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6686c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6687c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6688c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6689c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6690936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_online); 6691936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_offline); 66926ffa01d8STejun Heo #ifdef CONFIG_PM 6693cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6694cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 66956ffa01d8STejun Heo #endif /* CONFIG_PM */ 6696c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6697c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 6698963e4975SAlan Cox EXPORT_SYMBOL_GPL(ata_do_dev_read_id); 6699c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6700c6fd2807SJeff Garzik 6701c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 67026357357cSTejun Heo EXPORT_SYMBOL_GPL(ata_timing_find_mode); 6703c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6704c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6705a0f79b92STejun Heo EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); 6706c6fd2807SJeff Garzik 6707c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6708c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6709c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 67106ffa01d8STejun Heo #ifdef CONFIG_PM 6711c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6712c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6713c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6714c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 67156ffa01d8STejun Heo #endif /* CONFIG_PM */ 6716c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6717c6fd2807SJeff Garzik 6718b64bbc39STejun Heo EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); 6719b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_push_desc); 6720b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); 6721cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_desc); 6722cbcdd875STejun Heo #ifdef CONFIG_PCI 6723cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_pbar_desc); 6724cbcdd875STejun Heo #endif /* CONFIG_PCI */ 6725c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6726dbd82616STejun Heo EXPORT_SYMBOL_GPL(ata_link_abort); 6727c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6728c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 67297d77b247STejun Heo EXPORT_SYMBOL_GPL(sata_async_notification); 6730c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6731c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6732c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6733c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 673410acf3b0SMark Lord EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); 6735c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 6736a1efdabaSTejun Heo EXPORT_SYMBOL_GPL(ata_std_error_handler); 6737be0d18dfSAlan Cox 6738be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 6739be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 6740be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 6741c88f90c3STejun Heo EXPORT_SYMBOL_GPL(ata_cable_ignore); 6742be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 6743