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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Alan Cox92c52c52007-11-19 14:30:16 +000033 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
40 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/kernel.h>
44#include <linux/module.h>
45#include <linux/pci.h>
46#include <linux/init.h>
47#include <linux/list.h>
48#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/spinlock.h>
50#include <linux/blkdev.h>
51#include <linux/delay.h>
52#include <linux/timer.h>
53#include <linux/interrupt.h>
54#include <linux/completion.h>
55#include <linux/suspend.h>
56#include <linux/workqueue.h>
David Hardeman378f0582005-09-17 17:55:31 +100057#include <linux/scatterlist.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040058#include <linux/io.h>
Arjan van de Ven79318052009-01-04 05:32:28 -080059#include <linux/async.h>
Mark Lorde18086d2009-03-19 13:32:21 -040060#include <linux/log2.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090061#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050063#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <scsi/scsi_host.h>
65#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#include <asm/byteorder.h>
Tejun Heo140b5e52007-12-12 12:21:52 +090067#include <linux/cdrom.h>
Akinobu Mita9990b6f2010-04-12 21:11:41 +090068#include <linux/ratelimit.h>
Lin Ming9ee4f392011-12-05 09:20:28 +080069#include <linux/pm_runtime.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71#include "libata.h"
Gwendal Grignoud9027472010-05-25 12:31:38 -070072#include "libata-transport.h"
Jeff Garzikfda0efc2007-01-31 07:43:15 -050073
Tejun Heod7bb4cc2006-05-31 18:27:46 +090074/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090075const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
76const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
77const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090078
Tejun Heo029cfd62008-03-25 12:22:49 +090079const struct ata_port_operations ata_base_port_ops = {
Tejun Heo0aa11132008-04-07 22:47:18 +090080 .prereset = ata_std_prereset,
Tejun Heo203c75b2008-04-07 22:47:18 +090081 .postreset = ata_std_postreset,
Tejun Heoa1efdab2008-03-25 12:22:50 +090082 .error_handler = ata_std_error_handler,
Tejun Heo029cfd62008-03-25 12:22:49 +090083};
84
85const struct ata_port_operations sata_port_ops = {
86 .inherits = &ata_base_port_ops,
87
88 .qc_defer = ata_std_qc_defer,
Tejun Heo57c9efd2008-04-07 22:47:19 +090089 .hardreset = sata_std_hardreset,
Tejun Heo029cfd62008-03-25 12:22:49 +090090};
91
Tejun Heo3373efd2006-05-15 20:57:53 +090092static unsigned int ata_dev_init_params(struct ata_device *dev,
93 u16 heads, u16 sectors);
94static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
95static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090096static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Tero Roponena78f57a2012-04-22 11:38:00 +030098atomic_t ata_print_id = ATOMIC_INIT(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Tejun Heo33267322008-02-13 09:15:09 +0900100struct ata_force_param {
101 const char *name;
102 unsigned int cbl;
103 int spd_limit;
104 unsigned long xfer_mask;
105 unsigned int horkage_on;
106 unsigned int horkage_off;
Tejun Heo05944bd2008-08-13 20:19:09 +0900107 unsigned int lflags;
Tejun Heo33267322008-02-13 09:15:09 +0900108};
109
110struct ata_force_ent {
111 int port;
112 int device;
113 struct ata_force_param param;
114};
115
116static struct ata_force_ent *ata_force_tbl;
117static int ata_force_tbl_size;
118
119static char ata_force_param_buf[PAGE_SIZE] __initdata;
Tejun Heo7afb4222008-03-09 20:21:53 +0900120/* param_buf is thrown away after initialization, disallow read */
121module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
Tejun Heo33267322008-02-13 09:15:09 +0900122MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
123
Tejun Heo2486fa52008-07-31 07:52:40 +0900124static int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -0400125module_param(atapi_enabled, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200126MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
Jeff Garzik1623c812005-08-30 03:37:42 -0400127
Adrian Bunkc5c61bd2008-02-25 02:07:25 +0200128static int atapi_dmadir = 0;
Albert Lee95de7192006-04-04 10:57:18 +0800129module_param(atapi_dmadir, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200130MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
Albert Lee95de7192006-04-04 10:57:18 +0800131
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900132int atapi_passthru16 = 1;
133module_param(atapi_passthru16, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200134MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900135
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500136int libata_fua = 0;
137module_param_named(fua, libata_fua, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200138MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500139
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400140static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100141module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
142MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
143
Alan Coxb3a70602007-10-02 12:38:26 -0400144static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
145module_param_named(dma, libata_dma_mask, int, 0444);
146MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
147
Tejun Heo87fbc5a2008-05-20 02:17:54 +0900148static int ata_probe_timeout;
Andrew Mortona8601e52006-06-25 01:36:52 -0700149module_param(ata_probe_timeout, int, 0444);
150MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
151
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400152int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400153module_param_named(noacpi, libata_noacpi, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200154MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700155
Alan Coxae8d4ee2007-11-04 22:05:49 -0500156int libata_allow_tpm = 0;
157module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200158MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
Alan Coxae8d4ee2007-11-04 22:05:49 -0500159
Tejun Heoe7ecd432010-05-19 15:38:58 +0200160static int atapi_an;
161module_param(atapi_an, int, 0444);
162MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164MODULE_AUTHOR("Jeff Garzik");
165MODULE_DESCRIPTION("Library module for ATA devices");
166MODULE_LICENSE("GPL");
167MODULE_VERSION(DRV_VERSION);
168
Edward Falk0baab862005-06-02 18:17:13 -0400169
Tejun Heo9913ff82009-01-29 20:31:31 +0900170static bool ata_sstatus_online(u32 sstatus)
171{
172 return (sstatus & 0xf) == 0x3;
173}
174
Tejun Heo1eca4362008-11-03 20:03:17 +0900175/**
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
Tejun Heoaadffb62008-07-31 17:02:41 +0900180 *
Tejun Heo1eca4362008-11-03 20:03:17 +0900181 * LOCKING:
182 * Host lock or EH context.
183 *
184 * RETURNS:
185 * Pointer to the next link.
Tejun Heoaadffb62008-07-31 17:02:41 +0900186 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900187struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
188 enum ata_link_iter_mode mode)
Tejun Heoaadffb62008-07-31 17:02:41 +0900189{
Tejun Heo1eca4362008-11-03 20:03:17 +0900190 BUG_ON(mode != ATA_LITER_EDGE &&
191 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
Tejun Heoaadffb62008-07-31 17:02:41 +0900192
Tejun Heo1eca4362008-11-03 20:03:17 +0900193 /* NULL link indicates start of iteration */
194 if (!link)
195 switch (mode) {
196 case ATA_LITER_EDGE:
197 case ATA_LITER_PMP_FIRST:
198 if (sata_pmp_attached(ap))
199 return ap->pmp_link;
200 /* fall through */
201 case ATA_LITER_HOST_FIRST:
202 return &ap->link;
203 }
204
205 /* we just iterated over the host link, what's next? */
206 if (link == &ap->link)
207 switch (mode) {
208 case ATA_LITER_HOST_FIRST:
209 if (sata_pmp_attached(ap))
210 return ap->pmp_link;
211 /* fall through */
212 case ATA_LITER_PMP_FIRST:
213 if (unlikely(ap->slave_link))
Tejun Heob1c72912008-07-31 17:02:43 +0900214 return ap->slave_link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900215 /* fall through */
216 case ATA_LITER_EDGE:
Tejun Heoaadffb62008-07-31 17:02:41 +0900217 return NULL;
Tejun Heob1c72912008-07-31 17:02:43 +0900218 }
Tejun Heoaadffb62008-07-31 17:02:41 +0900219
Tejun Heob1c72912008-07-31 17:02:43 +0900220 /* slave_link excludes PMP */
221 if (unlikely(link == ap->slave_link))
222 return NULL;
223
Tejun Heo1eca4362008-11-03 20:03:17 +0900224 /* we were over a PMP link */
Tejun Heoaadffb62008-07-31 17:02:41 +0900225 if (++link < ap->pmp_link + ap->nr_pmp_links)
226 return link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900227
228 if (mode == ATA_LITER_PMP_FIRST)
229 return &ap->link;
230
Tejun Heoaadffb62008-07-31 17:02:41 +0900231 return NULL;
232}
233
Edward Falk0baab862005-06-02 18:17:13 -0400234/**
Tejun Heo1eca4362008-11-03 20:03:17 +0900235 * ata_dev_next - device iteration helper
236 * @dev: the previous device, NULL to start
237 * @link: ATA link containing devices to iterate
238 * @mode: iteration mode, one of ATA_DITER_*
239 *
240 * LOCKING:
241 * Host lock or EH context.
242 *
243 * RETURNS:
244 * Pointer to the next device.
245 */
246struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
247 enum ata_dev_iter_mode mode)
248{
249 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
250 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
251
252 /* NULL dev indicates start of iteration */
253 if (!dev)
254 switch (mode) {
255 case ATA_DITER_ENABLED:
256 case ATA_DITER_ALL:
257 dev = link->device;
258 goto check;
259 case ATA_DITER_ENABLED_REVERSE:
260 case ATA_DITER_ALL_REVERSE:
261 dev = link->device + ata_link_max_devices(link) - 1;
262 goto check;
263 }
264
265 next:
266 /* move to the next one */
267 switch (mode) {
268 case ATA_DITER_ENABLED:
269 case ATA_DITER_ALL:
270 if (++dev < link->device + ata_link_max_devices(link))
271 goto check;
272 return NULL;
273 case ATA_DITER_ENABLED_REVERSE:
274 case ATA_DITER_ALL_REVERSE:
275 if (--dev >= link->device)
276 goto check;
277 return NULL;
278 }
279
280 check:
281 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
282 !ata_dev_enabled(dev))
283 goto next;
284 return dev;
285}
286
287/**
Tejun Heob1c72912008-07-31 17:02:43 +0900288 * ata_dev_phys_link - find physical link for a device
289 * @dev: ATA device to look up physical link for
290 *
291 * Look up physical link which @dev is attached to. Note that
292 * this is different from @dev->link only when @dev is on slave
293 * link. For all other cases, it's the same as @dev->link.
294 *
295 * LOCKING:
296 * Don't care.
297 *
298 * RETURNS:
299 * Pointer to the found physical link.
300 */
301struct ata_link *ata_dev_phys_link(struct ata_device *dev)
302{
303 struct ata_port *ap = dev->link->ap;
304
305 if (!ap->slave_link)
306 return dev->link;
307 if (!dev->devno)
308 return &ap->link;
309 return ap->slave_link;
310}
311
312/**
Tejun Heo33267322008-02-13 09:15:09 +0900313 * ata_force_cbl - force cable type according to libata.force
Randy Dunlap4cdfa1b2008-02-22 12:21:37 -0800314 * @ap: ATA port of interest
Tejun Heo33267322008-02-13 09:15:09 +0900315 *
316 * Force cable type according to libata.force and whine about it.
317 * The last entry which has matching port number is used, so it
318 * can be specified as part of device force parameters. For
319 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
320 * same effect.
321 *
322 * LOCKING:
323 * EH context.
324 */
325void ata_force_cbl(struct ata_port *ap)
326{
327 int i;
328
329 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
330 const struct ata_force_ent *fe = &ata_force_tbl[i];
331
332 if (fe->port != -1 && fe->port != ap->print_id)
333 continue;
334
335 if (fe->param.cbl == ATA_CBL_NONE)
336 continue;
337
338 ap->cbl = fe->param.cbl;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700339 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900340 return;
341 }
342}
343
344/**
Tejun Heo05944bd2008-08-13 20:19:09 +0900345 * ata_force_link_limits - force link limits according to libata.force
Tejun Heo33267322008-02-13 09:15:09 +0900346 * @link: ATA link of interest
347 *
Tejun Heo05944bd2008-08-13 20:19:09 +0900348 * Force link flags and SATA spd limit according to libata.force
349 * and whine about it. When only the port part is specified
350 * (e.g. 1:), the limit applies to all links connected to both
351 * the host link and all fan-out ports connected via PMP. If the
352 * device part is specified as 0 (e.g. 1.00:), it specifies the
353 * first fan-out link not the host link. Device number 15 always
Tejun Heob1c72912008-07-31 17:02:43 +0900354 * points to the host link whether PMP is attached or not. If the
355 * controller has slave link, device number 16 points to it.
Tejun Heo33267322008-02-13 09:15:09 +0900356 *
357 * LOCKING:
358 * EH context.
359 */
Tejun Heo05944bd2008-08-13 20:19:09 +0900360static void ata_force_link_limits(struct ata_link *link)
Tejun Heo33267322008-02-13 09:15:09 +0900361{
Tejun Heo05944bd2008-08-13 20:19:09 +0900362 bool did_spd = false;
Tejun Heob1c72912008-07-31 17:02:43 +0900363 int linkno = link->pmp;
364 int i;
Tejun Heo33267322008-02-13 09:15:09 +0900365
366 if (ata_is_host_link(link))
Tejun Heob1c72912008-07-31 17:02:43 +0900367 linkno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900368
369 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
370 const struct ata_force_ent *fe = &ata_force_tbl[i];
371
372 if (fe->port != -1 && fe->port != link->ap->print_id)
373 continue;
374
375 if (fe->device != -1 && fe->device != linkno)
376 continue;
377
Tejun Heo05944bd2008-08-13 20:19:09 +0900378 /* only honor the first spd limit */
379 if (!did_spd && fe->param.spd_limit) {
380 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700381 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
Tejun Heo05944bd2008-08-13 20:19:09 +0900382 fe->param.name);
383 did_spd = true;
384 }
Tejun Heo33267322008-02-13 09:15:09 +0900385
Tejun Heo05944bd2008-08-13 20:19:09 +0900386 /* let lflags stack */
387 if (fe->param.lflags) {
388 link->flags |= fe->param.lflags;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700389 ata_link_notice(link,
Tejun Heo05944bd2008-08-13 20:19:09 +0900390 "FORCE: link flag 0x%x forced -> 0x%x\n",
391 fe->param.lflags, link->flags);
392 }
Tejun Heo33267322008-02-13 09:15:09 +0900393 }
394}
395
396/**
397 * ata_force_xfermask - force xfermask according to libata.force
398 * @dev: ATA device of interest
399 *
400 * Force xfer_mask according to libata.force and whine about it.
401 * For consistency with link selection, device number 15 selects
402 * the first device connected to the host link.
403 *
404 * LOCKING:
405 * EH context.
406 */
407static void ata_force_xfermask(struct ata_device *dev)
408{
409 int devno = dev->link->pmp + dev->devno;
410 int alt_devno = devno;
411 int i;
412
Tejun Heob1c72912008-07-31 17:02:43 +0900413 /* allow n.15/16 for devices attached to host port */
414 if (ata_is_host_link(dev->link))
415 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900416
417 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
418 const struct ata_force_ent *fe = &ata_force_tbl[i];
419 unsigned long pio_mask, mwdma_mask, udma_mask;
420
421 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
422 continue;
423
424 if (fe->device != -1 && fe->device != devno &&
425 fe->device != alt_devno)
426 continue;
427
428 if (!fe->param.xfer_mask)
429 continue;
430
431 ata_unpack_xfermask(fe->param.xfer_mask,
432 &pio_mask, &mwdma_mask, &udma_mask);
433 if (udma_mask)
434 dev->udma_mask = udma_mask;
435 else if (mwdma_mask) {
436 dev->udma_mask = 0;
437 dev->mwdma_mask = mwdma_mask;
438 } else {
439 dev->udma_mask = 0;
440 dev->mwdma_mask = 0;
441 dev->pio_mask = pio_mask;
442 }
443
Joe Perchesa9a79df2011-04-15 15:51:59 -0700444 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
445 fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900446 return;
447 }
448}
449
450/**
451 * ata_force_horkage - force horkage according to libata.force
452 * @dev: ATA device of interest
453 *
454 * Force horkage according to libata.force and whine about it.
455 * For consistency with link selection, device number 15 selects
456 * the first device connected to the host link.
457 *
458 * LOCKING:
459 * EH context.
460 */
461static void ata_force_horkage(struct ata_device *dev)
462{
463 int devno = dev->link->pmp + dev->devno;
464 int alt_devno = devno;
465 int i;
466
Tejun Heob1c72912008-07-31 17:02:43 +0900467 /* allow n.15/16 for devices attached to host port */
468 if (ata_is_host_link(dev->link))
469 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900470
471 for (i = 0; i < ata_force_tbl_size; i++) {
472 const struct ata_force_ent *fe = &ata_force_tbl[i];
473
474 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
475 continue;
476
477 if (fe->device != -1 && fe->device != devno &&
478 fe->device != alt_devno)
479 continue;
480
481 if (!(~dev->horkage & fe->param.horkage_on) &&
482 !(dev->horkage & fe->param.horkage_off))
483 continue;
484
485 dev->horkage |= fe->param.horkage_on;
486 dev->horkage &= ~fe->param.horkage_off;
487
Joe Perchesa9a79df2011-04-15 15:51:59 -0700488 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
489 fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900490 }
491}
492
493/**
Tejun Heo436d34b2008-04-02 17:28:46 +0900494 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
495 * @opcode: SCSI opcode
496 *
497 * Determine ATAPI command type from @opcode.
498 *
499 * LOCKING:
500 * None.
501 *
502 * RETURNS:
503 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
504 */
505int atapi_cmd_type(u8 opcode)
506{
507 switch (opcode) {
508 case GPCMD_READ_10:
509 case GPCMD_READ_12:
510 return ATAPI_READ;
511
512 case GPCMD_WRITE_10:
513 case GPCMD_WRITE_12:
514 case GPCMD_WRITE_AND_VERIFY_10:
515 return ATAPI_WRITE;
516
517 case GPCMD_READ_CD:
518 case GPCMD_READ_CD_MSF:
519 return ATAPI_READ_CD;
520
Tejun Heoe52dcc42008-04-02 17:35:19 +0900521 case ATA_16:
522 case ATA_12:
523 if (atapi_passthru16)
524 return ATAPI_PASS_THRU;
525 /* fall thru */
Tejun Heo436d34b2008-04-02 17:28:46 +0900526 default:
527 return ATAPI_MISC;
528 }
529}
530
531/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
533 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900535 * @is_cmd: This FIS is for command
536 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 *
538 * Converts a standard ATA taskfile to a Serial ATA
539 * FIS structure (Register - Host to Device).
540 *
541 * LOCKING:
542 * Inherited from caller.
543 */
Tejun Heo99771262007-07-16 14:29:38 +0900544void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
Tejun Heo99771262007-07-16 14:29:38 +0900546 fis[0] = 0x27; /* Register - Host to Device FIS */
547 fis[1] = pmp & 0xf; /* Port multiplier number*/
548 if (is_cmd)
549 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 fis[2] = tf->command;
552 fis[3] = tf->feature;
553
554 fis[4] = tf->lbal;
555 fis[5] = tf->lbam;
556 fis[6] = tf->lbah;
557 fis[7] = tf->device;
558
559 fis[8] = tf->hob_lbal;
560 fis[9] = tf->hob_lbam;
561 fis[10] = tf->hob_lbah;
562 fis[11] = tf->hob_feature;
563
564 fis[12] = tf->nsect;
565 fis[13] = tf->hob_nsect;
566 fis[14] = 0;
567 fis[15] = tf->ctl;
568
569 fis[16] = 0;
570 fis[17] = 0;
571 fis[18] = 0;
572 fis[19] = 0;
573}
574
575/**
576 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
577 * @fis: Buffer from which data will be input
578 * @tf: Taskfile to output
579 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500580 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 *
582 * LOCKING:
583 * Inherited from caller.
584 */
585
Jeff Garzik057ace52005-10-22 14:27:05 -0400586void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587{
588 tf->command = fis[2]; /* status */
589 tf->feature = fis[3]; /* error */
590
591 tf->lbal = fis[4];
592 tf->lbam = fis[5];
593 tf->lbah = fis[6];
594 tf->device = fis[7];
595
596 tf->hob_lbal = fis[8];
597 tf->hob_lbam = fis[9];
598 tf->hob_lbah = fis[10];
599
600 tf->nsect = fis[12];
601 tf->hob_nsect = fis[13];
602}
603
Albert Lee8cbd6df2005-10-12 15:06:27 +0800604static const u8 ata_rw_cmds[] = {
605 /* pio multi */
606 ATA_CMD_READ_MULTI,
607 ATA_CMD_WRITE_MULTI,
608 ATA_CMD_READ_MULTI_EXT,
609 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100610 0,
611 0,
612 0,
613 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800614 /* pio */
615 ATA_CMD_PIO_READ,
616 ATA_CMD_PIO_WRITE,
617 ATA_CMD_PIO_READ_EXT,
618 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100619 0,
620 0,
621 0,
622 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800623 /* dma */
624 ATA_CMD_READ,
625 ATA_CMD_WRITE,
626 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100627 ATA_CMD_WRITE_EXT,
628 0,
629 0,
630 0,
631 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800632};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800635 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900636 * @tf: command to examine and configure
637 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500639 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800640 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 *
642 * LOCKING:
643 * caller.
644 */
Tejun Heobd056d72006-11-14 22:47:10 +0900645static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100647 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100649 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500650
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100651 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800652 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
653 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
Albert Lee8cbd6df2005-10-12 15:06:27 +0800655 if (dev->flags & ATA_DFLAG_PIO) {
656 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100657 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900658 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000659 /* Unable to use DMA due to host limitation */
660 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800661 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800662 } else {
663 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100664 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800665 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100667 cmd = ata_rw_cmds[index + fua + lba48 + write];
668 if (cmd) {
669 tf->command = cmd;
670 return 0;
671 }
672 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673}
674
Tejun Heocb95d562006-03-06 04:31:56 +0900675/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900676 * ata_tf_read_block - Read block address from ATA taskfile
677 * @tf: ATA taskfile of interest
678 * @dev: ATA device @tf belongs to
679 *
680 * LOCKING:
681 * None.
682 *
683 * Read block address from @tf. This function can handle all
684 * three address formats - LBA, LBA48 and CHS. tf->protocol and
685 * flags select the address format to use.
686 *
687 * RETURNS:
688 * Block address read from @tf.
689 */
690u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
691{
692 u64 block = 0;
693
694 if (tf->flags & ATA_TFLAG_LBA) {
695 if (tf->flags & ATA_TFLAG_LBA48) {
696 block |= (u64)tf->hob_lbah << 40;
697 block |= (u64)tf->hob_lbam << 32;
Roland Dreier44901a92008-11-04 10:34:48 -0800698 block |= (u64)tf->hob_lbal << 24;
Tejun Heo35b649f2006-11-14 22:37:35 +0900699 } else
700 block |= (tf->device & 0xf) << 24;
701
702 block |= tf->lbah << 16;
703 block |= tf->lbam << 8;
704 block |= tf->lbal;
705 } else {
706 u32 cyl, head, sect;
707
708 cyl = tf->lbam | (tf->lbah << 8);
709 head = tf->device & 0xf;
710 sect = tf->lbal;
711
Tejun Heoac8672e2009-08-16 21:21:21 +0900712 if (!sect) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700713 ata_dev_warn(dev,
714 "device reported invalid CHS sector 0\n");
Tejun Heoac8672e2009-08-16 21:21:21 +0900715 sect = 1; /* oh well */
716 }
717
718 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
Tejun Heo35b649f2006-11-14 22:37:35 +0900719 }
720
721 return block;
722}
723
724/**
Tejun Heobd056d72006-11-14 22:47:10 +0900725 * ata_build_rw_tf - Build ATA taskfile for given read/write request
726 * @tf: Target ATA taskfile
727 * @dev: ATA device @tf belongs to
728 * @block: Block address
729 * @n_block: Number of blocks
730 * @tf_flags: RW/FUA etc...
731 * @tag: tag
732 *
733 * LOCKING:
734 * None.
735 *
736 * Build ATA taskfile @tf for read/write request described by
737 * @block, @n_block, @tf_flags and @tag on @dev.
738 *
739 * RETURNS:
740 *
741 * 0 on success, -ERANGE if the request is too large for @dev,
742 * -EINVAL if the request is invalid.
743 */
744int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
745 u64 block, u32 n_block, unsigned int tf_flags,
746 unsigned int tag)
747{
748 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
749 tf->flags |= tf_flags;
750
Tejun Heo6d1245b2007-02-20 23:20:27 +0900751 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900752 /* yay, NCQ */
753 if (!lba_48_ok(block, n_block))
754 return -ERANGE;
755
756 tf->protocol = ATA_PROT_NCQ;
757 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
758
759 if (tf->flags & ATA_TFLAG_WRITE)
760 tf->command = ATA_CMD_FPDMA_WRITE;
761 else
762 tf->command = ATA_CMD_FPDMA_READ;
763
764 tf->nsect = tag << 3;
765 tf->hob_feature = (n_block >> 8) & 0xff;
766 tf->feature = n_block & 0xff;
767
768 tf->hob_lbah = (block >> 40) & 0xff;
769 tf->hob_lbam = (block >> 32) & 0xff;
770 tf->hob_lbal = (block >> 24) & 0xff;
771 tf->lbah = (block >> 16) & 0xff;
772 tf->lbam = (block >> 8) & 0xff;
773 tf->lbal = block & 0xff;
774
775 tf->device = 1 << 6;
776 if (tf->flags & ATA_TFLAG_FUA)
777 tf->device |= 1 << 7;
778 } else if (dev->flags & ATA_DFLAG_LBA) {
779 tf->flags |= ATA_TFLAG_LBA;
780
781 if (lba_28_ok(block, n_block)) {
782 /* use LBA28 */
783 tf->device |= (block >> 24) & 0xf;
784 } else if (lba_48_ok(block, n_block)) {
785 if (!(dev->flags & ATA_DFLAG_LBA48))
786 return -ERANGE;
787
788 /* use LBA48 */
789 tf->flags |= ATA_TFLAG_LBA48;
790
791 tf->hob_nsect = (n_block >> 8) & 0xff;
792
793 tf->hob_lbah = (block >> 40) & 0xff;
794 tf->hob_lbam = (block >> 32) & 0xff;
795 tf->hob_lbal = (block >> 24) & 0xff;
796 } else
797 /* request too large even for LBA48 */
798 return -ERANGE;
799
800 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
801 return -EINVAL;
802
803 tf->nsect = n_block & 0xff;
804
805 tf->lbah = (block >> 16) & 0xff;
806 tf->lbam = (block >> 8) & 0xff;
807 tf->lbal = block & 0xff;
808
809 tf->device |= ATA_LBA;
810 } else {
811 /* CHS */
812 u32 sect, head, cyl, track;
813
814 /* The request -may- be too large for CHS addressing. */
815 if (!lba_28_ok(block, n_block))
816 return -ERANGE;
817
818 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
819 return -EINVAL;
820
821 /* Convert LBA to CHS */
822 track = (u32)block / dev->sectors;
823 cyl = track / dev->heads;
824 head = track % dev->heads;
825 sect = (u32)block % dev->sectors + 1;
826
827 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
828 (u32)block, track, cyl, head, sect);
829
830 /* Check whether the converted CHS can fit.
831 Cylinder: 0-65535
832 Head: 0-15
833 Sector: 1-255*/
834 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
835 return -ERANGE;
836
837 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
838 tf->lbal = sect;
839 tf->lbam = cyl;
840 tf->lbah = cyl >> 8;
841 tf->device |= head;
842 }
843
844 return 0;
845}
846
847/**
Tejun Heocb95d562006-03-06 04:31:56 +0900848 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
849 * @pio_mask: pio_mask
850 * @mwdma_mask: mwdma_mask
851 * @udma_mask: udma_mask
852 *
853 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
854 * unsigned int xfer_mask.
855 *
856 * LOCKING:
857 * None.
858 *
859 * RETURNS:
860 * Packed xfer_mask.
861 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900862unsigned long ata_pack_xfermask(unsigned long pio_mask,
863 unsigned long mwdma_mask,
864 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900865{
866 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
867 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
868 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
869}
870
Tejun Heoc0489e42006-03-24 14:07:49 +0900871/**
872 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
873 * @xfer_mask: xfer_mask to unpack
874 * @pio_mask: resulting pio_mask
875 * @mwdma_mask: resulting mwdma_mask
876 * @udma_mask: resulting udma_mask
877 *
878 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
879 * Any NULL distination masks will be ignored.
880 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900881void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
882 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900883{
884 if (pio_mask)
885 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
886 if (mwdma_mask)
887 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
888 if (udma_mask)
889 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
890}
891
Tejun Heocb95d562006-03-06 04:31:56 +0900892static const struct ata_xfer_ent {
Tejun Heobe9a50c82006-03-31 22:48:52 +0900893 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900894 u8 base;
895} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900896 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
897 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
898 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900899 { -1, },
900};
901
902/**
903 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
904 * @xfer_mask: xfer_mask of interest
905 *
906 * Return matching XFER_* value for @xfer_mask. Only the highest
907 * bit of @xfer_mask is considered.
908 *
909 * LOCKING:
910 * None.
911 *
912 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900913 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900914 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900915u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900916{
917 int highbit = fls(xfer_mask) - 1;
918 const struct ata_xfer_ent *ent;
919
920 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
921 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
922 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900923 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900924}
925
926/**
927 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
928 * @xfer_mode: XFER_* of interest
929 *
930 * Return matching xfer_mask for @xfer_mode.
931 *
932 * LOCKING:
933 * None.
934 *
935 * RETURNS:
936 * Matching xfer_mask, 0 if no match found.
937 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900938unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900939{
940 const struct ata_xfer_ent *ent;
941
942 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
943 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900944 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
945 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900946 return 0;
947}
948
949/**
950 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
951 * @xfer_mode: XFER_* of interest
952 *
953 * Return matching xfer_shift for @xfer_mode.
954 *
955 * LOCKING:
956 * None.
957 *
958 * RETURNS:
959 * Matching xfer_shift, -1 if no match found.
960 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900961int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900962{
963 const struct ata_xfer_ent *ent;
964
965 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
966 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
967 return ent->shift;
968 return -1;
969}
970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900972 * ata_mode_string - convert xfer_mask to string
973 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 *
975 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900976 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 *
978 * LOCKING:
979 * None.
980 *
981 * RETURNS:
982 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900983 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900985const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986{
Tejun Heo75f554b2006-03-06 04:31:57 +0900987 static const char * const xfer_mode_str[] = {
988 "PIO0",
989 "PIO1",
990 "PIO2",
991 "PIO3",
992 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100993 "PIO5",
994 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900995 "MWDMA0",
996 "MWDMA1",
997 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100998 "MWDMA3",
999 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +09001000 "UDMA/16",
1001 "UDMA/25",
1002 "UDMA/33",
1003 "UDMA/44",
1004 "UDMA/66",
1005 "UDMA/100",
1006 "UDMA/133",
1007 "UDMA7",
1008 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001009 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001011 highbit = fls(xfer_mask) - 1;
1012 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1013 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015}
1016
Gwendal Grignoud9027472010-05-25 12:31:38 -07001017const char *sata_spd_string(unsigned int spd)
Tejun Heo4c360c82006-04-01 01:38:17 +09001018{
1019 static const char * const spd_str[] = {
1020 "1.5 Gbps",
1021 "3.0 Gbps",
Shane Huang8522ee22008-12-30 11:00:37 +08001022 "6.0 Gbps",
Tejun Heo4c360c82006-04-01 01:38:17 +09001023 };
1024
1025 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1026 return "<unknown>";
1027 return spd_str[spd - 1];
1028}
1029
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030/**
1031 * ata_dev_classify - determine device type based on ATA-spec signature
1032 * @tf: ATA taskfile register set for device to be identified
1033 *
1034 * Determine from taskfile register contents whether a device is
1035 * ATA or ATAPI, as per "Signature and persistence" section
1036 * of ATA/PI spec (volume 1, sect 5.14).
1037 *
1038 * LOCKING:
1039 * None.
1040 *
1041 * RETURNS:
Tejun Heo633273a2007-09-23 13:19:54 +09001042 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1043 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 */
Jeff Garzik057ace52005-10-22 14:27:05 -04001045unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046{
1047 /* Apple's open source Darwin code hints that some devices only
1048 * put a proper signature into the LBA mid/high registers,
1049 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a2007-09-23 13:19:54 +09001050 *
1051 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1052 * signatures for ATA and ATAPI devices attached on SerialATA,
1053 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1054 * spec has never mentioned about using different signatures
1055 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1056 * Multiplier specification began to use 0x69/0x96 to identify
1057 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1058 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1059 * 0x69/0x96 shortly and described them as reserved for
1060 * SerialATA.
1061 *
1062 * We follow the current spec and consider that 0x69/0x96
1063 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Tejun Heo79b42ba2009-04-15 06:21:10 +09001064 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1065 * SEMB signature. This is worked around in
1066 * ata_dev_read_id().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 */
Tejun Heo633273a2007-09-23 13:19:54 +09001068 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 DPRINTK("found ATA device by sig\n");
1070 return ATA_DEV_ATA;
1071 }
1072
Tejun Heo633273a2007-09-23 13:19:54 +09001073 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 DPRINTK("found ATAPI device by sig\n");
1075 return ATA_DEV_ATAPI;
1076 }
1077
Tejun Heo633273a2007-09-23 13:19:54 +09001078 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1079 DPRINTK("found PMP device by sig\n");
1080 return ATA_DEV_PMP;
1081 }
1082
1083 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001084 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1085 return ATA_DEV_SEMB;
Tejun Heo633273a2007-09-23 13:19:54 +09001086 }
1087
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 DPRINTK("unknown device\n");
1089 return ATA_DEV_UNKNOWN;
1090}
1091
1092/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001093 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 * @id: IDENTIFY DEVICE results we will examine
1095 * @s: string into which data is output
1096 * @ofs: offset into identify device page
1097 * @len: length of string to return. must be an even number.
1098 *
1099 * The strings in the IDENTIFY DEVICE page are broken up into
1100 * 16-bit chunks. Run through the string, and output each
1101 * 8-bit chunk linearly, regardless of platform.
1102 *
1103 * LOCKING:
1104 * caller.
1105 */
1106
Tejun Heo6a62a042006-02-13 10:02:46 +09001107void ata_id_string(const u16 *id, unsigned char *s,
1108 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109{
1110 unsigned int c;
1111
Alan Cox963e4972008-07-24 17:16:06 +01001112 BUG_ON(len & 1);
1113
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 while (len > 0) {
1115 c = id[ofs] >> 8;
1116 *s = c;
1117 s++;
1118
1119 c = id[ofs] & 0xff;
1120 *s = c;
1121 s++;
1122
1123 ofs++;
1124 len -= 2;
1125 }
1126}
1127
Tejun Heo0e949ff2006-02-12 22:47:04 +09001128/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001129 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001130 * @id: IDENTIFY DEVICE results we will examine
1131 * @s: string into which data is output
1132 * @ofs: offset into identify device page
1133 * @len: length of string to return. must be an odd number.
1134 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001135 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001136 * trims trailing spaces and terminates the resulting string with
1137 * null. @len must be actual maximum length (even number) + 1.
1138 *
1139 * LOCKING:
1140 * caller.
1141 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001142void ata_id_c_string(const u16 *id, unsigned char *s,
1143 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001144{
1145 unsigned char *p;
1146
Tejun Heo6a62a042006-02-13 10:02:46 +09001147 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001148
1149 p = s + strnlen(s, len - 1);
1150 while (p > s && p[-1] == ' ')
1151 p--;
1152 *p = '\0';
1153}
Edward Falk0baab862005-06-02 18:17:13 -04001154
Tejun Heodb6f8752007-09-03 12:31:58 +09001155static u64 ata_id_n_sectors(const u16 *id)
1156{
1157 if (ata_id_has_lba(id)) {
1158 if (ata_id_has_lba48(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001159 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
Tejun Heodb6f8752007-09-03 12:31:58 +09001160 else
Robert Hancock968e5942009-02-16 20:15:08 -06001161 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
Tejun Heodb6f8752007-09-03 12:31:58 +09001162 } else {
1163 if (ata_id_current_chs_valid(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001164 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1165 id[ATA_ID_CUR_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001166 else
Robert Hancock968e5942009-02-16 20:15:08 -06001167 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1168 id[ATA_ID_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001169 }
1170}
1171
Tejun Heoa5987e02008-03-27 19:14:23 +09001172u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001173{
1174 u64 sectors = 0;
1175
1176 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1177 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
Roland Dreierba14a9c2008-10-28 16:52:20 -07001178 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
Alan Cox1e999732007-04-11 00:23:13 +01001179 sectors |= (tf->lbah & 0xff) << 16;
1180 sectors |= (tf->lbam & 0xff) << 8;
1181 sectors |= (tf->lbal & 0xff);
1182
Tejun Heoa5987e02008-03-27 19:14:23 +09001183 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001184}
1185
Tejun Heoa5987e02008-03-27 19:14:23 +09001186u64 ata_tf_to_lba(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001187{
1188 u64 sectors = 0;
1189
1190 sectors |= (tf->device & 0x0f) << 24;
1191 sectors |= (tf->lbah & 0xff) << 16;
1192 sectors |= (tf->lbam & 0xff) << 8;
1193 sectors |= (tf->lbal & 0xff);
1194
Tejun Heoa5987e02008-03-27 19:14:23 +09001195 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001196}
1197
1198/**
Tejun Heoc728a912007-09-03 12:32:30 +09001199 * ata_read_native_max_address - Read native max address
1200 * @dev: target device
1201 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001202 *
Tejun Heoc728a912007-09-03 12:32:30 +09001203 * Perform an LBA48 or LBA28 native size query upon the device in
1204 * question.
1205 *
1206 * RETURNS:
1207 * 0 on success, -EACCES if command is aborted by the drive.
1208 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001209 */
Tejun Heoc728a912007-09-03 12:32:30 +09001210static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001211{
Tejun Heoc728a912007-09-03 12:32:30 +09001212 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001213 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001214 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001215
1216 ata_tf_init(dev, &tf);
1217
Tejun Heoc728a912007-09-03 12:32:30 +09001218 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001219 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001220
1221 if (lba48) {
1222 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1223 tf.flags |= ATA_TFLAG_LBA48;
1224 } else
1225 tf.command = ATA_CMD_READ_NATIVE_MAX;
1226
Alan Cox1e999732007-04-11 00:23:13 +01001227 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001228 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001229
Tejun Heo2b789102007-10-09 15:05:44 +09001230 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001231 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001232 ata_dev_warn(dev,
1233 "failed to read native max address (err_mask=0x%x)\n",
1234 err_mask);
Tejun Heoc728a912007-09-03 12:32:30 +09001235 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1236 return -EACCES;
1237 return -EIO;
1238 }
Alan Cox1e999732007-04-11 00:23:13 +01001239
Tejun Heoc728a912007-09-03 12:32:30 +09001240 if (lba48)
Tejun Heoa5987e02008-03-27 19:14:23 +09001241 *max_sectors = ata_tf_to_lba48(&tf) + 1;
Tejun Heoc728a912007-09-03 12:32:30 +09001242 else
Tejun Heoa5987e02008-03-27 19:14:23 +09001243 *max_sectors = ata_tf_to_lba(&tf) + 1;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001244 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001245 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001246 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001247}
1248
1249/**
Tejun Heoc728a912007-09-03 12:32:30 +09001250 * ata_set_max_sectors - Set max sectors
1251 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001252 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001253 *
Tejun Heoc728a912007-09-03 12:32:30 +09001254 * Set max sectors of @dev to @new_sectors.
1255 *
1256 * RETURNS:
1257 * 0 on success, -EACCES if command is aborted or denied (due to
1258 * previous non-volatile SET_MAX) by the drive. -EIO on other
1259 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001260 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001261static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001262{
Tejun Heoc728a912007-09-03 12:32:30 +09001263 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001264 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001265 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001266
1267 new_sectors--;
1268
1269 ata_tf_init(dev, &tf);
1270
Alan Cox1e999732007-04-11 00:23:13 +01001271 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001272
1273 if (lba48) {
1274 tf.command = ATA_CMD_SET_MAX_EXT;
1275 tf.flags |= ATA_TFLAG_LBA48;
1276
1277 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1278 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1279 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001280 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001281 tf.command = ATA_CMD_SET_MAX;
1282
Tejun Heo1e582ba2007-09-21 20:07:14 +09001283 tf.device |= (new_sectors >> 24) & 0xf;
1284 }
1285
Alan Cox1e999732007-04-11 00:23:13 +01001286 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001287 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001288
1289 tf.lbal = (new_sectors >> 0) & 0xff;
1290 tf.lbam = (new_sectors >> 8) & 0xff;
1291 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001292
Tejun Heo2b789102007-10-09 15:05:44 +09001293 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001294 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001295 ata_dev_warn(dev,
1296 "failed to set max address (err_mask=0x%x)\n",
1297 err_mask);
Tejun Heoc728a912007-09-03 12:32:30 +09001298 if (err_mask == AC_ERR_DEV &&
1299 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1300 return -EACCES;
1301 return -EIO;
1302 }
Alan Cox1e999732007-04-11 00:23:13 +01001303
Tejun Heoc728a912007-09-03 12:32:30 +09001304 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001305}
1306
1307/**
1308 * ata_hpa_resize - Resize a device with an HPA set
1309 * @dev: Device to resize
1310 *
1311 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1312 * it if required to the full size of the media. The caller must check
1313 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001314 *
1315 * RETURNS:
1316 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001317 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001318static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001319{
Tejun Heo05027ad2007-09-03 12:32:57 +09001320 struct ata_eh_context *ehc = &dev->link->eh_context;
1321 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo445d2112010-04-05 10:33:13 +09001322 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
Tejun Heo05027ad2007-09-03 12:32:57 +09001323 u64 sectors = ata_id_n_sectors(dev->id);
1324 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001325 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001326
Tejun Heo05027ad2007-09-03 12:32:57 +09001327 /* do we need to do it? */
1328 if (dev->class != ATA_DEV_ATA ||
1329 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1330 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001331 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001332
Tejun Heo05027ad2007-09-03 12:32:57 +09001333 /* read native max address */
1334 rc = ata_read_native_max_address(dev, &native_sectors);
1335 if (rc) {
Tejun Heodda7aba2008-03-23 21:05:15 +09001336 /* If device aborted the command or HPA isn't going to
1337 * be unlocked, skip HPA resizing.
Tejun Heo05027ad2007-09-03 12:32:57 +09001338 */
Tejun Heo445d2112010-04-05 10:33:13 +09001339 if (rc == -EACCES || !unlock_hpa) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001340 ata_dev_warn(dev,
1341 "HPA support seems broken, skipping HPA handling\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001342 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001343
Tejun Heo05027ad2007-09-03 12:32:57 +09001344 /* we can continue if device aborted the command */
1345 if (rc == -EACCES)
1346 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001347 }
Tejun Heo37301a52007-06-25 20:45:54 +09001348
Tejun Heo05027ad2007-09-03 12:32:57 +09001349 return rc;
1350 }
Tejun Heo5920dad2009-07-15 17:11:41 +09001351 dev->n_native_sectors = native_sectors;
Tejun Heo05027ad2007-09-03 12:32:57 +09001352
1353 /* nothing to do? */
Tejun Heo445d2112010-04-05 10:33:13 +09001354 if (native_sectors <= sectors || !unlock_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001355 if (!print_info || native_sectors == sectors)
1356 return 0;
1357
1358 if (native_sectors > sectors)
Joe Perchesa9a79df2011-04-15 15:51:59 -07001359 ata_dev_info(dev,
Tejun Heo05027ad2007-09-03 12:32:57 +09001360 "HPA detected: current %llu, native %llu\n",
1361 (unsigned long long)sectors,
1362 (unsigned long long)native_sectors);
1363 else if (native_sectors < sectors)
Joe Perchesa9a79df2011-04-15 15:51:59 -07001364 ata_dev_warn(dev,
1365 "native sectors (%llu) is smaller than sectors (%llu)\n",
Tejun Heo05027ad2007-09-03 12:32:57 +09001366 (unsigned long long)native_sectors,
1367 (unsigned long long)sectors);
1368 return 0;
1369 }
1370
1371 /* let's unlock HPA */
1372 rc = ata_set_max_sectors(dev, native_sectors);
1373 if (rc == -EACCES) {
1374 /* if device aborted the command, skip HPA resizing */
Joe Perchesa9a79df2011-04-15 15:51:59 -07001375 ata_dev_warn(dev,
1376 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1377 (unsigned long long)sectors,
1378 (unsigned long long)native_sectors);
Tejun Heo05027ad2007-09-03 12:32:57 +09001379 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1380 return 0;
1381 } else if (rc)
1382 return rc;
1383
1384 /* re-read IDENTIFY data */
1385 rc = ata_dev_reread_id(dev, 0);
1386 if (rc) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001387 ata_dev_err(dev,
1388 "failed to re-read IDENTIFY data after HPA resizing\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001389 return rc;
1390 }
1391
1392 if (print_info) {
1393 u64 new_sectors = ata_id_n_sectors(dev->id);
Joe Perchesa9a79df2011-04-15 15:51:59 -07001394 ata_dev_info(dev,
Tejun Heo05027ad2007-09-03 12:32:57 +09001395 "HPA unlocked: %llu -> %llu, native %llu\n",
1396 (unsigned long long)sectors,
1397 (unsigned long long)new_sectors,
1398 (unsigned long long)native_sectors);
1399 }
1400
1401 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001402}
1403
Edward Falk0baab862005-06-02 18:17:13 -04001404/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001406 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001408 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1409 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 *
1411 * LOCKING:
1412 * caller.
1413 */
1414
Tejun Heo0bd33002006-02-12 22:47:05 +09001415static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416{
1417 DPRINTK("49==0x%04x "
1418 "53==0x%04x "
1419 "63==0x%04x "
1420 "64==0x%04x "
1421 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001422 id[49],
1423 id[53],
1424 id[63],
1425 id[64],
1426 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 DPRINTK("80==0x%04x "
1428 "81==0x%04x "
1429 "82==0x%04x "
1430 "83==0x%04x "
1431 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001432 id[80],
1433 id[81],
1434 id[82],
1435 id[83],
1436 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 DPRINTK("88==0x%04x "
1438 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001439 id[88],
1440 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441}
1442
Tejun Heocb95d562006-03-06 04:31:56 +09001443/**
1444 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1445 * @id: IDENTIFY data to compute xfer mask from
1446 *
1447 * Compute the xfermask for this device. This is not as trivial
1448 * as it seems if we must consider early devices correctly.
1449 *
1450 * FIXME: pre IDE drive timing (do we care ?).
1451 *
1452 * LOCKING:
1453 * None.
1454 *
1455 * RETURNS:
1456 * Computed xfermask
1457 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001458unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001459{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001460 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001461
1462 /* Usual case. Word 53 indicates word 64 is valid */
1463 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1464 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1465 pio_mask <<= 3;
1466 pio_mask |= 0x7;
1467 } else {
1468 /* If word 64 isn't valid then Word 51 high byte holds
1469 * the PIO timing number for the maximum. Turn it into
1470 * a mask.
1471 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001472 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001473 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001474 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001475 else
1476 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001477
1478 /* But wait.. there's more. Design your standards by
1479 * committee and you too can get a free iordy field to
1480 * process. However its the speeds not the modes that
1481 * are supported... Note drivers using the timing API
1482 * will get this right anyway
1483 */
1484 }
1485
1486 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001487
Alan Coxb352e572006-08-10 18:52:12 +01001488 if (ata_id_is_cfa(id)) {
1489 /*
1490 * Process compact flash extended modes
1491 */
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04001492 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1493 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
Alan Coxb352e572006-08-10 18:52:12 +01001494
1495 if (pio)
1496 pio_mask |= (1 << 5);
1497 if (pio > 1)
1498 pio_mask |= (1 << 6);
1499 if (dma)
1500 mwdma_mask |= (1 << 3);
1501 if (dma > 1)
1502 mwdma_mask |= (1 << 4);
1503 }
1504
Tejun Heofb21f0d2006-03-12 12:34:35 +09001505 udma_mask = 0;
1506 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1507 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001508
1509 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1510}
1511
Adrian Bunk7102d232007-01-04 00:09:36 +01001512static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001513{
Tejun Heo77853bf2006-01-23 13:09:36 +09001514 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001515
Tejun Heoa2a7a662005-12-13 14:48:31 +09001516 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001517}
1518
1519/**
Tejun Heo24326972006-11-14 22:47:09 +09001520 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001521 * @dev: Device to which the command is sent
1522 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001523 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001524 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001525 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001526 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001527 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001528 *
1529 * Executes libata internal command with timeout. @tf contains
1530 * command on entry and result on return. Timeout and error
1531 * conditions are reported via return value. No recovery action
1532 * is taken after a command times out. It's caller's duty to
1533 * clean up after timeout.
1534 *
1535 * LOCKING:
1536 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001537 *
1538 * RETURNS:
1539 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001540 */
Tejun Heo24326972006-11-14 22:47:09 +09001541unsigned ata_exec_internal_sg(struct ata_device *dev,
1542 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001543 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001544 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001545{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001546 struct ata_link *link = dev->link;
1547 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001548 u8 command = tf->command;
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001549 int auto_timeout = 0;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001550 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001551 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001552 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001553 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001554 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001555 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001556 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001557 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001558
Jeff Garzikba6a1302006-06-22 23:46:10 -04001559 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001560
Tejun Heoe3180492006-05-15 20:58:09 +09001561 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001562 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001563 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001564 return AC_ERR_SYSTEM;
1565 }
1566
Tejun Heo2ab7db12006-05-15 20:58:02 +09001567 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001568
Tejun Heo2ab7db12006-05-15 20:58:02 +09001569 /* XXX: Tag 0 is used for drivers with legacy EH as some
1570 * drivers choke if any other tag is given. This breaks
1571 * ata_tag_internal() test for those drivers. Don't use new
1572 * EH stuff without converting to it.
1573 */
1574 if (ap->ops->error_handler)
1575 tag = ATA_TAG_INTERNAL;
1576 else
1577 tag = 0;
1578
Tejun Heo8a8bc222008-11-10 14:48:21 +09001579 if (test_and_set_bit(tag, &ap->qc_allocated))
1580 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001581 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001582
1583 qc->tag = tag;
1584 qc->scsicmd = NULL;
1585 qc->ap = ap;
1586 qc->dev = dev;
1587 ata_qc_reinit(qc);
1588
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001589 preempted_tag = link->active_tag;
1590 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001591 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001592 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001593 link->active_tag = ATA_TAG_POISON;
1594 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001595 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001596 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001597
1598 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001599 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001600 if (cdb)
1601 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001602 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001603 qc->dma_dir = dma_dir;
1604 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001605 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001606 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001607
Jens Axboe87260212007-10-16 11:14:12 +02001608 for_each_sg(sgl, sg, n_elem, i)
1609 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001610
Jens Axboe87260212007-10-16 11:14:12 +02001611 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001612 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001613 }
1614
Tejun Heo77853bf2006-01-23 13:09:36 +09001615 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001616 qc->complete_fn = ata_qc_complete_internal;
1617
Tejun Heo8e0e6942006-03-31 20:41:11 +09001618 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001619
Jeff Garzikba6a1302006-06-22 23:46:10 -04001620 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001621
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001622 if (!timeout) {
1623 if (ata_probe_timeout)
1624 timeout = ata_probe_timeout * 1000;
1625 else {
1626 timeout = ata_internal_cmd_timeout(dev, command);
1627 auto_timeout = 1;
1628 }
1629 }
Tejun Heo2b789102007-10-09 15:05:44 +09001630
Tejun Heoc0c362b2010-09-06 17:57:14 +02001631 if (ap->ops->error_handler)
1632 ata_eh_release(ap);
1633
Tejun Heo2b789102007-10-09 15:05:44 +09001634 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001635
Tejun Heoc0c362b2010-09-06 17:57:14 +02001636 if (ap->ops->error_handler)
1637 ata_eh_acquire(ap);
1638
Tejun Heoc4291372010-05-10 21:41:38 +02001639 ata_sff_flush_pio_task(ap);
Tejun Heod95a7172006-05-15 20:58:14 +09001640
1641 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001642 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001643
1644 /* We're racing with irq here. If we lose, the
1645 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001646 * twice. If we win, the port is frozen and will be
1647 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001648 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001649 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001650 qc->err_mask |= AC_ERR_TIMEOUT;
1651
1652 if (ap->ops->error_handler)
1653 ata_port_freeze(ap);
1654 else
1655 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001656
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001657 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07001658 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1659 command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001660 }
1661
Jeff Garzikba6a1302006-06-22 23:46:10 -04001662 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001663 }
1664
Tejun Heod95a7172006-05-15 20:58:14 +09001665 /* do post_internal_cmd */
1666 if (ap->ops->post_internal_cmd)
1667 ap->ops->post_internal_cmd(qc);
1668
Tejun Heoa51d6442007-03-20 15:24:11 +09001669 /* perform minimal error analysis */
1670 if (qc->flags & ATA_QCFLAG_FAILED) {
1671 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1672 qc->err_mask |= AC_ERR_DEV;
1673
1674 if (!qc->err_mask)
1675 qc->err_mask |= AC_ERR_OTHER;
1676
1677 if (qc->err_mask & ~AC_ERR_OTHER)
1678 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001679 }
1680
Tejun Heo15869302006-05-15 20:57:33 +09001681 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001682 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001683
Tejun Heoe61e0672006-05-15 20:57:40 +09001684 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001685 err_mask = qc->err_mask;
1686
1687 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001688 link->active_tag = preempted_tag;
1689 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001690 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001691 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001692
Jeff Garzikba6a1302006-06-22 23:46:10 -04001693 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001694
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001695 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1696 ata_internal_cmd_timed_out(dev, command);
1697
Tejun Heo77853bf2006-01-23 13:09:36 +09001698 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001699}
1700
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701/**
Tejun Heo33480a02006-12-12 02:15:31 +09001702 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001703 * @dev: Device to which the command is sent
1704 * @tf: Taskfile registers for the command and the result
1705 * @cdb: CDB for packet command
1706 * @dma_dir: Data tranfer direction of the command
1707 * @buf: Data buffer of the command
1708 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001709 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001710 *
1711 * Wrapper around ata_exec_internal_sg() which takes simple
1712 * buffer instead of sg list.
1713 *
1714 * LOCKING:
1715 * None. Should be called with kernel context, might sleep.
1716 *
1717 * RETURNS:
1718 * Zero on success, AC_ERR_* mask on failure
1719 */
1720unsigned ata_exec_internal(struct ata_device *dev,
1721 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001722 int dma_dir, void *buf, unsigned int buflen,
1723 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001724{
Tejun Heo33480a02006-12-12 02:15:31 +09001725 struct scatterlist *psg = NULL, sg;
1726 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001727
Tejun Heo33480a02006-12-12 02:15:31 +09001728 if (dma_dir != DMA_NONE) {
1729 WARN_ON(!buf);
1730 sg_init_one(&sg, buf, buflen);
1731 psg = &sg;
1732 n_elem++;
1733 }
Tejun Heo24326972006-11-14 22:47:09 +09001734
Tejun Heo2b789102007-10-09 15:05:44 +09001735 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1736 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001737}
1738
1739/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001740 * ata_do_simple_cmd - execute simple internal command
1741 * @dev: Device to which the command is sent
1742 * @cmd: Opcode to execute
1743 *
1744 * Execute a 'simple' command, that only consists of the opcode
1745 * 'cmd' itself, without filling any other registers
1746 *
1747 * LOCKING:
1748 * Kernel thread context (may sleep).
1749 *
1750 * RETURNS:
1751 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001752 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001753unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001754{
1755 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001756
1757 ata_tf_init(dev, &tf);
1758
1759 tf.command = cmd;
1760 tf.flags |= ATA_TFLAG_DEVICE;
1761 tf.protocol = ATA_PROT_NODATA;
1762
Tejun Heo2b789102007-10-09 15:05:44 +09001763 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001764}
1765
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001767 * ata_pio_need_iordy - check if iordy needed
1768 * @adev: ATA device
1769 *
1770 * Check if the current speed of the device requires IORDY. Used
1771 * by various controllers for chip configuration.
1772 */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001773unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1774{
Tejun Heo0d9e6652009-06-11 11:04:45 +09001775 /* Don't set IORDY if we're preparing for reset. IORDY may
1776 * lead to controller lock up on certain controllers if the
1777 * port is not occupied. See bko#11703 for details.
1778 */
1779 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1780 return 0;
1781 /* Controller doesn't support IORDY. Probably a pointless
1782 * check as the caller should know this.
1783 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001784 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001785 return 0;
David Daney5c18c4d2008-12-10 15:39:12 -08001786 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1787 if (ata_id_is_cfa(adev->id)
1788 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1789 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001790 /* PIO3 and higher it is mandatory */
1791 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001792 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001793 /* We turn it on when possible */
1794 if (ata_id_has_iordy(adev->id))
1795 return 1;
1796 return 0;
1797}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001798
Alan Cox432729f2007-03-08 23:22:59 +00001799/**
1800 * ata_pio_mask_no_iordy - Return the non IORDY mask
1801 * @adev: ATA device
1802 *
1803 * Compute the highest mode possible if we are not using iordy. Return
1804 * -1 if no iordy mode is available.
1805 */
Alan Cox432729f2007-03-08 23:22:59 +00001806static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1807{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001808 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001809 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001810 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001811 /* Is the speed faster than the drive allows non IORDY ? */
1812 if (pio) {
1813 /* This is cycle times not frequency - watch the logic! */
1814 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001815 return 3 << ATA_SHIFT_PIO;
1816 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001817 }
1818 }
Alan Cox432729f2007-03-08 23:22:59 +00001819 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001820}
1821
1822/**
Alan Cox963e4972008-07-24 17:16:06 +01001823 * ata_do_dev_read_id - default ID read method
1824 * @dev: device
1825 * @tf: proposed taskfile
1826 * @id: data buffer
1827 *
1828 * Issue the identify taskfile and hand back the buffer containing
1829 * identify data. For some RAID controllers and for pre ATA devices
1830 * this function is wrapped or replaced by the driver
1831 */
1832unsigned int ata_do_dev_read_id(struct ata_device *dev,
1833 struct ata_taskfile *tf, u16 *id)
1834{
1835 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1836 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1837}
1838
1839/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001840 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001841 * @dev: target device
1842 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001843 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001844 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001845 *
1846 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1847 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001848 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1849 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001850 *
Alan Cox50a99012007-08-08 14:27:00 +01001851 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001852 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01001853 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001854 * LOCKING:
1855 * Kernel thread context (may sleep)
1856 *
1857 * RETURNS:
1858 * 0 on success, -errno otherwise.
1859 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001860int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001861 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001862{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001863 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001864 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001865 struct ata_taskfile tf;
1866 unsigned int err_mask = 0;
1867 const char *reason;
Tejun Heo79b42ba2009-04-15 06:21:10 +09001868 bool is_semb = class == ATA_DEV_SEMB;
Tejun Heo54936f82007-05-11 14:35:29 +02001869 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09001870 int rc;
1871
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001872 if (ata_msg_ctl(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07001873 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001874
Alan Cox963e4972008-07-24 17:16:06 +01001875retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001876 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001877
1878 switch (class) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001879 case ATA_DEV_SEMB:
1880 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
Tejun Heo49016ac2006-02-21 02:12:11 +09001881 case ATA_DEV_ATA:
1882 tf.command = ATA_CMD_ID_ATA;
1883 break;
1884 case ATA_DEV_ATAPI:
1885 tf.command = ATA_CMD_ID_ATAPI;
1886 break;
1887 default:
1888 rc = -ENODEV;
1889 reason = "unsupported class";
1890 goto err_out;
1891 }
1892
1893 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001894
1895 /* Some devices choke if TF registers contain garbage. Make
1896 * sure those are properly initialized.
1897 */
1898 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1899
1900 /* Device presence detection is unreliable on some
1901 * controllers. Always poll IDENTIFY if available.
1902 */
1903 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001904
Alan Cox963e4972008-07-24 17:16:06 +01001905 if (ap->ops->read_id)
1906 err_mask = ap->ops->read_id(dev, &tf, id);
1907 else
1908 err_mask = ata_do_dev_read_id(dev, &tf, id);
1909
Tejun Heo49016ac2006-02-21 02:12:11 +09001910 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001911 if (err_mask & AC_ERR_NODEV_HINT) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001912 ata_dev_dbg(dev, "NODEV after polling detection\n");
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001913 return -ENOENT;
1914 }
1915
Tejun Heo79b42ba2009-04-15 06:21:10 +09001916 if (is_semb) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001917 ata_dev_info(dev,
1918 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
Tejun Heo79b42ba2009-04-15 06:21:10 +09001919 /* SEMB is not supported yet */
1920 *p_class = ATA_DEV_SEMB_UNSUP;
1921 return 0;
1922 }
1923
Tejun Heo1ffc1512008-03-23 15:16:53 +09001924 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1925 /* Device or controller might have reported
1926 * the wrong device class. Give a shot at the
1927 * other IDENTIFY if the current one is
1928 * aborted by the device.
1929 */
1930 if (may_fallback) {
1931 may_fallback = 0;
Tejun Heo54936f82007-05-11 14:35:29 +02001932
Tejun Heo1ffc1512008-03-23 15:16:53 +09001933 if (class == ATA_DEV_ATA)
1934 class = ATA_DEV_ATAPI;
1935 else
1936 class = ATA_DEV_ATA;
1937 goto retry;
1938 }
1939
1940 /* Control reaches here iff the device aborted
1941 * both flavors of IDENTIFYs which happens
1942 * sometimes with phantom devices.
1943 */
Joe Perchesa9a79df2011-04-15 15:51:59 -07001944 ata_dev_dbg(dev,
1945 "both IDENTIFYs aborted, assuming NODEV\n");
Tejun Heo1ffc1512008-03-23 15:16:53 +09001946 return -ENOENT;
Tejun Heo54936f82007-05-11 14:35:29 +02001947 }
1948
Tejun Heo49016ac2006-02-21 02:12:11 +09001949 rc = -EIO;
1950 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001951 goto err_out;
1952 }
1953
Tejun Heo43c9c592010-05-23 12:59:11 +02001954 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001955 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1956 "class=%d may_fallback=%d tried_spinup=%d\n",
1957 class, may_fallback, tried_spinup);
Tejun Heo43c9c592010-05-23 12:59:11 +02001958 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1959 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1960 }
1961
Tejun Heo54936f82007-05-11 14:35:29 +02001962 /* Falling back doesn't make sense if ID data was read
1963 * successfully at least once.
1964 */
1965 may_fallback = 0;
1966
Tejun Heo49016ac2006-02-21 02:12:11 +09001967 swap_buf_le16(id, ATA_ID_WORDS);
1968
Tejun Heo49016ac2006-02-21 02:12:11 +09001969 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001970 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01001971 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07001972
1973 if (class == ATA_DEV_ATA) {
1974 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1975 goto err_out;
1976 } else {
1977 if (ata_id_is_ata(id))
1978 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001979 }
1980
Mark Lord169439c2007-04-17 18:26:07 -04001981 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1982 tried_spinup = 1;
1983 /*
1984 * Drive powered-up in standby mode, and requires a specific
1985 * SET_FEATURES spin-up subcommand before it will accept
1986 * anything other than the original IDENTIFY command.
1987 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04001988 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07001989 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04001990 rc = -EIO;
1991 reason = "SPINUP failed";
1992 goto err_out;
1993 }
1994 /*
1995 * If the drive initially returned incomplete IDENTIFY info,
1996 * we now must reissue the IDENTIFY command.
1997 */
1998 if (id[2] == 0x37c8)
1999 goto retry;
2000 }
2001
Tejun Heobff04642006-11-10 18:08:10 +09002002 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09002003 /*
2004 * The exact sequence expected by certain pre-ATA4 drives is:
2005 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01002006 * IDENTIFY (optional in early ATA)
2007 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09002008 * anything else..
2009 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01002010 *
2011 * Note that ATA4 says lba is mandatory so the second check
Adam Buchbinderc9404c92009-12-18 15:40:42 -05002012 * should never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09002013 */
2014 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09002015 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09002016 if (err_mask) {
2017 rc = -EIO;
2018 reason = "INIT_DEV_PARAMS failed";
2019 goto err_out;
2020 }
2021
2022 /* current CHS translation info (id[53-58]) might be
2023 * changed. reread the identify device info.
2024 */
Tejun Heobff04642006-11-10 18:08:10 +09002025 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09002026 goto retry;
2027 }
2028 }
2029
2030 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09002031
Tejun Heo49016ac2006-02-21 02:12:11 +09002032 return 0;
2033
2034 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09002035 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002036 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2037 reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002038 return rc;
2039}
2040
Tejun Heo90627122009-01-29 20:31:36 +09002041static int ata_do_link_spd_horkage(struct ata_device *dev)
2042{
2043 struct ata_link *plink = ata_dev_phys_link(dev);
2044 u32 target, target_limit;
2045
2046 if (!sata_scr_valid(plink))
2047 return 0;
2048
2049 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2050 target = 1;
2051 else
2052 return 0;
2053
2054 target_limit = (1 << target) - 1;
2055
2056 /* if already on stricter limit, no need to push further */
2057 if (plink->sata_spd_limit <= target_limit)
2058 return 0;
2059
2060 plink->sata_spd_limit = target_limit;
2061
2062 /* Request another EH round by returning -EAGAIN if link is
2063 * going faster than the target speed. Forward progress is
2064 * guaranteed by setting sata_spd_limit to target_limit above.
2065 */
2066 if (plink->sata_spd > target) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002067 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2068 sata_spd_string(target));
Tejun Heo90627122009-01-29 20:31:36 +09002069 return -EAGAIN;
2070 }
2071 return 0;
2072}
2073
Tejun Heo3373efd2006-05-15 20:57:53 +09002074static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002075{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002076 struct ata_port *ap = dev->link->ap;
Jens Axboe9ce8e302008-08-27 15:23:18 +02002077
2078 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2079 return 0;
2080
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002081 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002082}
2083
Shaohua Li388539f2009-07-27 09:24:35 +08002084static int ata_dev_config_ncq(struct ata_device *dev,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002085 char *desc, size_t desc_sz)
2086{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002087 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002088 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
Shaohua Li388539f2009-07-27 09:24:35 +08002089 unsigned int err_mask;
2090 char *aa_desc = "";
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002091
2092 if (!ata_id_has_ncq(dev->id)) {
2093 desc[0] = '\0';
Shaohua Li388539f2009-07-27 09:24:35 +08002094 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002095 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002096 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002097 snprintf(desc, desc_sz, "NCQ (not used)");
Shaohua Li388539f2009-07-27 09:24:35 +08002098 return 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07002099 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002100 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002101 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002102 dev->flags |= ATA_DFLAG_NCQ;
2103 }
2104
Shaohua Li388539f2009-07-27 09:24:35 +08002105 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2106 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2107 ata_id_has_fpdma_aa(dev->id)) {
2108 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2109 SATA_FPDMA_AA);
2110 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002111 ata_dev_err(dev,
2112 "failed to enable AA (error_mask=0x%x)\n",
2113 err_mask);
Shaohua Li388539f2009-07-27 09:24:35 +08002114 if (err_mask != AC_ERR_DEV) {
2115 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2116 return -EIO;
2117 }
2118 } else
2119 aa_desc = ", AA";
2120 }
2121
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002122 if (hdepth >= ddepth)
Shaohua Li388539f2009-07-27 09:24:35 +08002123 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002124 else
Shaohua Li388539f2009-07-27 09:24:35 +08002125 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2126 ddepth, aa_desc);
2127 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002128}
2129
Tejun Heo49016ac2006-02-21 02:12:11 +09002130/**
Tejun Heoffeae412006-03-01 16:09:35 +09002131 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002132 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 *
Tejun Heoffeae412006-03-01 16:09:35 +09002134 * Configure @dev according to @dev->id. Generic and low-level
2135 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 *
2137 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002138 * Kernel thread context (may sleep)
2139 *
2140 * RETURNS:
2141 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002143int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002145 struct ata_port *ap = dev->link->ap;
2146 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002147 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002148 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002149 unsigned long xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002150 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002151 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2152 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002153 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002155 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002156 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002157 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 }
2159
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002160 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002161 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162
Tejun Heo75683fe2007-07-05 13:31:27 +09002163 /* set horkage */
2164 dev->horkage |= ata_dev_blacklisted(dev);
Tejun Heo33267322008-02-13 09:15:09 +09002165 ata_force_horkage(dev);
Tejun Heo75683fe2007-07-05 13:31:27 +09002166
Tejun Heo50af2fa2008-05-19 01:15:14 +09002167 if (dev->horkage & ATA_HORKAGE_DISABLE) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002168 ata_dev_info(dev, "unsupported device, disabling\n");
Tejun Heo50af2fa2008-05-19 01:15:14 +09002169 ata_dev_disable(dev);
2170 return 0;
2171 }
2172
Tejun Heo2486fa52008-07-31 07:52:40 +09002173 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2174 dev->class == ATA_DEV_ATAPI) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002175 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2176 atapi_enabled ? "not supported with this driver"
2177 : "disabled");
Tejun Heo2486fa52008-07-31 07:52:40 +09002178 ata_dev_disable(dev);
2179 return 0;
2180 }
2181
Tejun Heo90627122009-01-29 20:31:36 +09002182 rc = ata_do_link_spd_horkage(dev);
2183 if (rc)
2184 return rc;
2185
Tejun Heo67465442007-05-15 03:28:16 +09002186 /* let ACPI work its magic */
2187 rc = ata_acpi_on_devcfg(dev);
2188 if (rc)
2189 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002190
Tejun Heo05027ad2007-09-03 12:32:57 +09002191 /* massage HPA, do it early as it might change IDENTIFY data */
2192 rc = ata_hpa_resize(dev);
2193 if (rc)
2194 return rc;
2195
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002196 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002197 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002198 ata_dev_dbg(dev,
2199 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2200 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2201 __func__,
2202 id[49], id[82], id[83], id[84],
2203 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002204
Tejun Heo208a9932006-03-05 17:55:58 +09002205 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002206 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002207 dev->max_sectors = 0;
2208 dev->cdb_len = 0;
2209 dev->n_sectors = 0;
2210 dev->cylinders = 0;
2211 dev->heads = 0;
2212 dev->sectors = 0;
Mark Lorde18086d2009-03-19 13:32:21 -04002213 dev->multi_count = 0;
Tejun Heo208a9932006-03-05 17:55:58 +09002214
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 /*
2216 * common ATA, ATAPI feature tests
2217 */
2218
Tejun Heoff8854b2006-03-06 04:31:56 +09002219 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002220 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002222 if (ata_msg_probe(ap))
2223 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224
Albert Leeef143d52007-06-05 13:01:33 +08002225 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2226 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2227 sizeof(fwrevbuf));
2228
2229 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2230 sizeof(modelbuf));
2231
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 /* ATA-specific feature tests */
2233 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002234 if (ata_id_is_cfa(id)) {
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04002235 /* CPRM may make this media unusable */
2236 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002237 ata_dev_warn(dev,
2238 "supports DRM functions and may not be fully accessible\n");
Alan Coxb352e572006-08-10 18:52:12 +01002239 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002240 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002241 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002242 /* Warn the user if the device has TPM extensions */
2243 if (ata_id_has_tpm(id))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002244 ata_dev_warn(dev,
2245 "supports DRM functions and may not be fully accessible\n");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002246 }
Alan Coxb352e572006-08-10 18:52:12 +01002247
Tejun Heo1148c3a2006-03-13 19:48:04 +09002248 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002249
Mark Lorde18086d2009-03-19 13:32:21 -04002250 /* get current R/W Multiple count setting */
2251 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2252 unsigned int max = dev->id[47] & 0xff;
2253 unsigned int cnt = dev->id[59] & 0xff;
2254 /* only recognize/allow powers of two here */
2255 if (is_power_of_2(max) && is_power_of_2(cnt))
2256 if (cnt <= max)
2257 dev->multi_count = cnt;
2258 }
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002259
Tejun Heo1148c3a2006-03-13 19:48:04 +09002260 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002261 const char *lba_desc;
Shaohua Li388539f2009-07-27 09:24:35 +08002262 char ncq_desc[24];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002263
Tejun Heo4c2d7212006-03-05 17:55:58 +09002264 lba_desc = "LBA";
2265 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002266 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002267 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002268 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002269
2270 if (dev->n_sectors >= (1UL << 28) &&
2271 ata_id_has_flush_ext(id))
2272 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002273 }
Albert Lee8bf62ec2005-05-12 15:29:42 -04002274
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002275 /* config NCQ */
Shaohua Li388539f2009-07-27 09:24:35 +08002276 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2277 if (rc)
2278 return rc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002279
Albert Lee8bf62ec2005-05-12 15:29:42 -04002280 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002281 if (ata_msg_drv(ap) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002282 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2283 revbuf, modelbuf, fwrevbuf,
2284 ata_mode_string(xfer_mask));
2285 ata_dev_info(dev,
2286 "%llu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002287 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002288 dev->multi_count, lba_desc, ncq_desc);
2289 }
Tejun Heoffeae412006-03-01 16:09:35 +09002290 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002291 /* CHS */
2292
2293 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002294 dev->cylinders = id[1];
2295 dev->heads = id[3];
2296 dev->sectors = id[6];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002297
Tejun Heo1148c3a2006-03-13 19:48:04 +09002298 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002299 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002300 dev->cylinders = id[54];
2301 dev->heads = id[55];
2302 dev->sectors = id[56];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002303 }
2304
2305 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002306 if (ata_msg_drv(ap) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002307 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2308 revbuf, modelbuf, fwrevbuf,
2309 ata_mode_string(xfer_mask));
2310 ata_dev_info(dev,
2311 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2312 (unsigned long long)dev->n_sectors,
2313 dev->multi_count, dev->cylinders,
2314 dev->heads, dev->sectors);
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002315 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002316 }
2317
Tejun Heo6e7846e2006-02-12 23:32:58 +09002318 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 }
2320
2321 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002322 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002323 const char *cdb_intr_string = "";
2324 const char *atapi_an_string = "";
Tejun Heo91163002008-02-21 13:25:50 +09002325 const char *dma_dir_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002326 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002327
Tejun Heo1148c3a2006-03-13 19:48:04 +09002328 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002330 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002331 ata_dev_warn(dev, "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002332 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333 goto err_out_nosup;
2334 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002335 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336
Tejun Heo7d77b242007-09-23 13:14:13 +09002337 /* Enable ATAPI AN if both the host and device have
2338 * the support. If PMP is attached, SNTF is required
2339 * to enable ATAPI AN to discern between PHY status
2340 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002341 */
Tejun Heoe7ecd432010-05-19 15:38:58 +02002342 if (atapi_an &&
2343 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
Tejun Heo071f44b2008-04-07 22:47:22 +09002344 (!sata_pmp_attached(ap) ||
Tejun Heo7d77b242007-09-23 13:14:13 +09002345 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002346 unsigned int err_mask;
2347
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002348 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002349 err_mask = ata_dev_set_feature(dev,
2350 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002351 if (err_mask)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002352 ata_dev_err(dev,
2353 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2354 err_mask);
Tejun Heo854c73a2007-09-23 13:14:11 +09002355 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002356 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002357 atapi_an_string = ", ATAPI AN";
2358 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002359 }
2360
Albert Lee08a556d2006-03-31 13:29:04 +08002361 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002362 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002363 cdb_intr_string = ", CDB intr";
2364 }
Albert Lee312f7da2005-09-27 17:38:03 +08002365
Tejun Heo91163002008-02-21 13:25:50 +09002366 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2367 dev->flags |= ATA_DFLAG_DMADIR;
2368 dma_dir_string = ", DMADIR";
2369 }
2370
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002372 if (ata_msg_drv(ap) && print_info)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002373 ata_dev_info(dev,
2374 "ATAPI: %s, %s, max %s%s%s%s\n",
2375 modelbuf, fwrevbuf,
2376 ata_mode_string(xfer_mask),
2377 cdb_intr_string, atapi_an_string,
2378 dma_dir_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379 }
2380
Tejun Heo914ed352006-11-01 18:39:55 +09002381 /* determine max_sectors */
2382 dev->max_sectors = ATA_MAX_SECTORS;
2383 if (dev->flags & ATA_DFLAG_LBA48)
2384 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2385
Alan Coxc5038fc2007-10-25 14:21:16 +01002386 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2387 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002388 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002389 if (ata_msg_drv(ap) && print_info)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002390 ata_dev_info(dev, "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002391 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002392 dev->max_sectors = ATA_MAX_SECTORS;
2393 }
2394
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002395 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002396 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002397 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002398 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2399 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002400
Tejun Heo75683fe2007-07-05 13:31:27 +09002401 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002402 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2403 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002404
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002405 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002406 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002407
Alan Coxc5038fc2007-10-25 14:21:16 +01002408 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2409 /* Let the user know. We don't want to disallow opens for
2410 rescue purposes, or in case the vendor is just a blithering
2411 idiot. Do this after the dev_config call as some controllers
2412 with buggy firmware may want to avoid reporting false device
2413 bugs */
2414
2415 if (print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002416 ata_dev_warn(dev,
Alan Coxc5038fc2007-10-25 14:21:16 +01002417"Drive reports diagnostics failure. This may indicate a drive\n");
Joe Perchesa9a79df2011-04-15 15:51:59 -07002418 ata_dev_warn(dev,
Alan Coxc5038fc2007-10-25 14:21:16 +01002419"fault or invalid emulation. Contact drive vendor for information.\n");
2420 }
2421 }
2422
Tejun Heoac70a962008-11-27 13:36:48 +09002423 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002424 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2425 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
Tejun Heoac70a962008-11-27 13:36:48 +09002426 }
2427
Tejun Heoffeae412006-03-01 16:09:35 +09002428 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429
2430err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002431 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002432 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002433 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434}
2435
2436/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002437 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002438 * @ap: port
2439 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002440 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002441 * detection.
2442 */
2443
2444int ata_cable_40wire(struct ata_port *ap)
2445{
2446 return ATA_CBL_PATA40;
2447}
2448
2449/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002450 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002451 * @ap: port
2452 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002453 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002454 * detection.
2455 */
2456
2457int ata_cable_80wire(struct ata_port *ap)
2458{
2459 return ATA_CBL_PATA80;
2460}
2461
2462/**
2463 * ata_cable_unknown - return unknown PATA cable.
2464 * @ap: port
2465 *
2466 * Helper method for drivers which have no PATA cable detection.
2467 */
2468
2469int ata_cable_unknown(struct ata_port *ap)
2470{
2471 return ATA_CBL_PATA_UNK;
2472}
2473
2474/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002475 * ata_cable_ignore - return ignored PATA cable.
2476 * @ap: port
2477 *
2478 * Helper method for drivers which don't use cable type to limit
2479 * transfer mode.
2480 */
2481int ata_cable_ignore(struct ata_port *ap)
2482{
2483 return ATA_CBL_PATA_IGN;
2484}
2485
2486/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002487 * ata_cable_sata - return SATA cable type
2488 * @ap: port
2489 *
2490 * Helper method for drivers which have SATA cables
2491 */
2492
2493int ata_cable_sata(struct ata_port *ap)
2494{
2495 return ATA_CBL_SATA;
2496}
2497
2498/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499 * ata_bus_probe - Reset and probe ATA bus
2500 * @ap: Bus to probe
2501 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002502 * Master ATA bus probing function. Initiates a hardware-dependent
2503 * bus reset, then attempts to identify any devices found on
2504 * the bus.
2505 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002507 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508 *
2509 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002510 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511 */
2512
Brian King80289162006-08-07 14:27:31 -05002513int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002515 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002516 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002517 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002518 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519
Tejun Heo1eca4362008-11-03 20:03:17 +09002520 ata_for_each_dev(dev, &ap->link, ALL)
Tejun Heof58229f2007-08-06 18:36:23 +09002521 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002522
2523 retry:
Tejun Heo1eca4362008-11-03 20:03:17 +09002524 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heocdeab112007-10-29 16:41:09 +09002525 /* If we issue an SRST then an ATA drive (not ATAPI)
2526 * may change configuration and be in PIO0 timing. If
2527 * we do a hard reset (or are coming from power on)
2528 * this is true for ATA or ATAPI. Until we've set a
2529 * suitable controller mode we should not touch the
2530 * bus as we may be talking too fast.
2531 */
2532 dev->pio_mode = XFER_PIO_0;
2533
2534 /* If the controller has a pio mode setup function
2535 * then use it to set the chipset to rights. Don't
2536 * touch the DMA setup as that will be dealt with when
2537 * configuring devices.
2538 */
2539 if (ap->ops->set_piomode)
2540 ap->ops->set_piomode(ap, dev);
2541 }
2542
Tejun Heo20444702006-03-13 01:57:01 +09002543 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002544 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002545
Tejun Heo1eca4362008-11-03 20:03:17 +09002546 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo3e4ec342010-05-10 21:41:30 +02002547 if (dev->class != ATA_DEV_UNKNOWN)
Tejun Heo52783c52006-05-31 18:28:22 +09002548 classes[dev->devno] = dev->class;
2549 else
2550 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002551
Tejun Heo52783c52006-05-31 18:28:22 +09002552 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002553 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002555 /* read IDENTIFY page and configure devices. We have to do the identify
2556 specific sequence bass-ackwards so that PDIAG- is released by
2557 the slave device */
2558
Tejun Heo1eca4362008-11-03 20:03:17 +09002559 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
Tejun Heof58229f2007-08-06 18:36:23 +09002560 if (tries[dev->devno])
2561 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002562
Tejun Heoe1211e32006-04-01 01:38:18 +09002563 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002564 continue;
2565
Tejun Heobff04642006-11-10 18:08:10 +09002566 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2567 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002568 if (rc)
2569 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002570 }
2571
Alan Coxbe0d18d2007-03-06 02:37:56 -08002572 /* Now ask for the cable type as PDIAG- should have been released */
2573 if (ap->ops->cable_detect)
2574 ap->cbl = ap->ops->cable_detect(ap);
2575
Tejun Heo1eca4362008-11-03 20:03:17 +09002576 /* We may have SATA bridge glue hiding here irrespective of
2577 * the reported cable types and sensed types. When SATA
2578 * drives indicate we have a bridge, we don't know which end
2579 * of the link the bridge is which is a problem.
2580 */
2581 ata_for_each_dev(dev, &ap->link, ENABLED)
Alan Cox614fe292007-08-22 23:22:45 +01002582 if (ata_id_is_sata(dev->id))
2583 ap->cbl = ATA_CBL_SATA;
Alan Cox614fe292007-08-22 23:22:45 +01002584
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002585 /* After the identify sequence we can now set up the devices. We do
2586 this in the normal order so that the user doesn't get confused */
2587
Tejun Heo1eca4362008-11-03 20:03:17 +09002588 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002589 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002590 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002591 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002592 if (rc)
2593 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594 }
2595
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002596 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002597 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002598 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002599 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600
Tejun Heo1eca4362008-11-03 20:03:17 +09002601 ata_for_each_dev(dev, &ap->link, ENABLED)
2602 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002603
Tejun Heo96072e62006-04-01 01:38:17 +09002604 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002605
2606 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002607 tries[dev->devno]--;
2608
Tejun Heo14d2bac2006-04-02 17:54:46 +09002609 switch (rc) {
2610 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002611 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002612 tries[dev->devno] = 0;
2613 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002614
2615 case -ENODEV:
2616 /* give it just one more chance */
2617 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002618 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002619 if (tries[dev->devno] == 1) {
2620 /* This is the last chance, better to slow
2621 * down than lose it.
2622 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002623 sata_down_spd_limit(&ap->link, 0);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002624 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2625 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002626 }
2627
Tejun Heo4ae72a12007-02-02 16:22:30 +09002628 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002629 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002630
Tejun Heo14d2bac2006-04-02 17:54:46 +09002631 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632}
2633
2634/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002635 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002636 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002637 *
2638 * This function prints link speed and status of a SATA link.
2639 *
2640 * LOCKING:
2641 * None.
2642 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002643static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002644{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002645 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002646
Tejun Heo936fd732007-08-06 18:36:23 +09002647 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002648 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002649 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002650
Tejun Heob1c72912008-07-31 17:02:43 +09002651 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002652 tmp = (sstatus >> 4) & 0xf;
Joe Perchesa9a79df2011-04-15 15:51:59 -07002653 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2654 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002655 } else {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002656 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2657 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002658 }
2659}
2660
2661/**
Alan Coxebdfca62006-03-23 15:38:34 +00002662 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002663 * @adev: device
2664 *
2665 * Obtain the other device on the same cable, or if none is
2666 * present NULL is returned
2667 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002668
Tejun Heo3373efd2006-05-15 20:57:53 +09002669struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002670{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002671 struct ata_link *link = adev->link;
2672 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002673 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002674 return NULL;
2675 return pair;
2676}
2677
2678/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002679 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002680 * @link: Link to adjust SATA spd limit for
Tejun Heoa07d4992009-01-29 20:31:33 +09002681 * @spd_limit: Additional limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09002682 *
Tejun Heo936fd732007-08-06 18:36:23 +09002683 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002684 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002685 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002686 *
Tejun Heoa07d4992009-01-29 20:31:33 +09002687 * If @spd_limit is non-zero, the speed is limited to equal to or
2688 * lower than @spd_limit if such speed is supported. If
2689 * @spd_limit is slower than any supported speed, only the lowest
2690 * supported speed is allowed.
2691 *
Tejun Heo1c3fae42006-04-02 20:53:28 +09002692 * LOCKING:
2693 * Inherited from caller.
2694 *
2695 * RETURNS:
2696 * 0 on success, negative errno on failure
2697 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002698int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002699{
Tejun Heo81952c52006-05-15 20:57:47 +09002700 u32 sstatus, spd, mask;
Tejun Heoa07d4992009-01-29 20:31:33 +09002701 int rc, bit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002702
Tejun Heo936fd732007-08-06 18:36:23 +09002703 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002704 return -EOPNOTSUPP;
2705
2706 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002707 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002708 */
Tejun Heo936fd732007-08-06 18:36:23 +09002709 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo9913ff82009-01-29 20:31:31 +09002710 if (rc == 0 && ata_sstatus_online(sstatus))
Tejun Heo008a7892007-07-16 14:29:40 +09002711 spd = (sstatus >> 4) & 0xf;
2712 else
Tejun Heo936fd732007-08-06 18:36:23 +09002713 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002714
Tejun Heo936fd732007-08-06 18:36:23 +09002715 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002716 if (mask <= 1)
2717 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002718
2719 /* unconditionally mask off the highest bit */
Tejun Heoa07d4992009-01-29 20:31:33 +09002720 bit = fls(mask) - 1;
2721 mask &= ~(1 << bit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002722
Tejun Heo008a7892007-07-16 14:29:40 +09002723 /* Mask off all speeds higher than or equal to the current
2724 * one. Force 1.5Gbps if current SPD is not available.
2725 */
2726 if (spd > 1)
2727 mask &= (1 << (spd - 1)) - 1;
2728 else
2729 mask &= 1;
2730
2731 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002732 if (!mask)
2733 return -EINVAL;
2734
Tejun Heoa07d4992009-01-29 20:31:33 +09002735 if (spd_limit) {
2736 if (mask & ((1 << spd_limit) - 1))
2737 mask &= (1 << spd_limit) - 1;
2738 else {
2739 bit = ffs(mask) - 1;
2740 mask = 1 << bit;
2741 }
2742 }
2743
Tejun Heo936fd732007-08-06 18:36:23 +09002744 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002745
Joe Perchesa9a79df2011-04-15 15:51:59 -07002746 ata_link_warn(link, "limiting SATA link speed to %s\n",
2747 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002748
2749 return 0;
2750}
2751
Tejun Heo936fd732007-08-06 18:36:23 +09002752static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002753{
Tejun Heo52702222007-10-31 10:17:07 +09002754 struct ata_link *host_link = &link->ap->link;
2755 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002756
Tejun Heo52702222007-10-31 10:17:07 +09002757 limit = link->sata_spd_limit;
2758
2759 /* Don't configure downstream link faster than upstream link.
2760 * It doesn't speed up anything and some PMPs choke on such
2761 * configuration.
2762 */
2763 if (!ata_is_host_link(link) && host_link->sata_spd)
2764 limit &= (1 << host_link->sata_spd) - 1;
2765
2766 if (limit == UINT_MAX)
2767 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002768 else
Tejun Heo52702222007-10-31 10:17:07 +09002769 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002770
2771 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002772 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002773
Tejun Heo52702222007-10-31 10:17:07 +09002774 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002775}
2776
2777/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002778 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002779 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002780 *
2781 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002782 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002783 * whether hardreset is necessary to apply SATA spd
2784 * configuration.
2785 *
2786 * LOCKING:
2787 * Inherited from caller.
2788 *
2789 * RETURNS:
2790 * 1 if SATA spd configuration is needed, 0 otherwise.
2791 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03002792static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002793{
2794 u32 scontrol;
2795
Tejun Heo936fd732007-08-06 18:36:23 +09002796 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002797 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002798
Tejun Heo936fd732007-08-06 18:36:23 +09002799 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002800}
2801
2802/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002803 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002804 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002805 *
Tejun Heo936fd732007-08-06 18:36:23 +09002806 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002807 *
2808 * LOCKING:
2809 * Inherited from caller.
2810 *
2811 * RETURNS:
2812 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002813 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002814 */
Tejun Heo936fd732007-08-06 18:36:23 +09002815int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002816{
2817 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002818 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002819
Tejun Heo936fd732007-08-06 18:36:23 +09002820 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002821 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002822
Tejun Heo936fd732007-08-06 18:36:23 +09002823 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002824 return 0;
2825
Tejun Heo936fd732007-08-06 18:36:23 +09002826 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002827 return rc;
2828
Tejun Heo1c3fae42006-04-02 20:53:28 +09002829 return 1;
2830}
2831
Alan Cox452503f2005-10-21 19:01:32 -04002832/*
2833 * This mode timing computation functionality is ported over from
2834 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2835 */
2836/*
Alan Coxb352e572006-08-10 18:52:12 +01002837 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002838 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002839 * for UDMA6, which is currently supported only by Maxtor drives.
2840 *
2841 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002842 */
2843
2844static const struct ata_timing ata_timing[] = {
David Daney3ada9c12009-01-15 17:45:31 -08002845/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2846 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2847 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2848 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2849 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2850 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2851 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2852 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002853
David Daney3ada9c12009-01-15 17:45:31 -08002854 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2855 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2856 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002857
David Daney3ada9c12009-01-15 17:45:31 -08002858 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2859 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2860 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2861 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2862 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002863
David Daney3ada9c12009-01-15 17:45:31 -08002864/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2865 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2866 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2867 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2868 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2869 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2870 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2871 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002872
2873 { 0xFF }
2874};
2875
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002876#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2877#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002878
2879static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2880{
David Daney3ada9c12009-01-15 17:45:31 -08002881 q->setup = EZ(t->setup * 1000, T);
2882 q->act8b = EZ(t->act8b * 1000, T);
2883 q->rec8b = EZ(t->rec8b * 1000, T);
2884 q->cyc8b = EZ(t->cyc8b * 1000, T);
2885 q->active = EZ(t->active * 1000, T);
2886 q->recover = EZ(t->recover * 1000, T);
2887 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2888 q->cycle = EZ(t->cycle * 1000, T);
2889 q->udma = EZ(t->udma * 1000, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002890}
2891
2892void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2893 struct ata_timing *m, unsigned int what)
2894{
2895 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2896 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2897 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2898 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2899 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2900 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
David Daney3ada9c12009-01-15 17:45:31 -08002901 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
Alan Cox452503f2005-10-21 19:01:32 -04002902 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2903 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2904}
2905
Tejun Heo63573572007-11-27 19:43:39 +09002906const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04002907{
Tejun Heo70cd0712007-11-27 19:43:40 +09002908 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04002909
Tejun Heo70cd0712007-11-27 19:43:40 +09002910 while (xfer_mode > t->mode)
2911 t++;
2912
2913 if (xfer_mode == t->mode)
2914 return t;
2915 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04002916}
2917
2918int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2919 struct ata_timing *t, int T, int UT)
2920{
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002921 const u16 *id = adev->id;
Alan Cox452503f2005-10-21 19:01:32 -04002922 const struct ata_timing *s;
2923 struct ata_timing p;
2924
2925 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002926 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002927 */
Alan Cox452503f2005-10-21 19:01:32 -04002928
2929 if (!(s = ata_timing_find_mode(speed)))
2930 return -EINVAL;
2931
Albert Lee75b1f2f2005-11-16 17:06:18 +08002932 memcpy(t, s, sizeof(*s));
2933
Alan Cox452503f2005-10-21 19:01:32 -04002934 /*
2935 * If the drive is an EIDE drive, it can tell us it needs extended
2936 * PIO/MW_DMA cycle timing.
2937 */
2938
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002939 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
Alan Cox452503f2005-10-21 19:01:32 -04002940 memset(&p, 0, sizeof(p));
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002941
Bartlomiej Zolnierkiewiczbff00252011-10-13 15:17:32 +02002942 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002943 if (speed <= XFER_PIO_2)
2944 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2945 else if ((speed <= XFER_PIO_4) ||
2946 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2947 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2948 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2949 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2950
Alan Cox452503f2005-10-21 19:01:32 -04002951 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2952 }
2953
2954 /*
2955 * Convert the timing to bus clock counts.
2956 */
2957
Albert Lee75b1f2f2005-11-16 17:06:18 +08002958 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002959
2960 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002961 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2962 * S.M.A.R.T * and some other commands. We have to ensure that the
2963 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002964 */
2965
Alanfd3367a2006-12-07 12:41:18 +00002966 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04002967 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2968 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2969 }
2970
2971 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002972 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002973 */
2974
2975 if (t->act8b + t->rec8b < t->cyc8b) {
2976 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2977 t->rec8b = t->cyc8b - t->act8b;
2978 }
2979
2980 if (t->active + t->recover < t->cycle) {
2981 t->active += (t->cycle - (t->active + t->recover)) / 2;
2982 t->recover = t->cycle - t->active;
2983 }
Jeff Garzika617c092007-05-21 20:14:23 -04002984
Alan Cox4f701d12007-04-23 11:55:36 +01002985 /* In a few cases quantisation may produce enough errors to
2986 leave t->cycle too low for the sum of active and recovery
2987 if so we must correct this */
2988 if (t->active + t->recover > t->cycle)
2989 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04002990
2991 return 0;
2992}
2993
Tejun Heocf176e12006-04-02 17:54:46 +09002994/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09002995 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2996 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
2997 * @cycle: cycle duration in ns
2998 *
2999 * Return matching xfer mode for @cycle. The returned mode is of
3000 * the transfer type specified by @xfer_shift. If @cycle is too
3001 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3002 * than the fastest known mode, the fasted mode is returned.
3003 *
3004 * LOCKING:
3005 * None.
3006 *
3007 * RETURNS:
3008 * Matching xfer_mode, 0xff if no match found.
3009 */
3010u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3011{
3012 u8 base_mode = 0xff, last_mode = 0xff;
3013 const struct ata_xfer_ent *ent;
3014 const struct ata_timing *t;
3015
3016 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3017 if (ent->shift == xfer_shift)
3018 base_mode = ent->base;
3019
3020 for (t = ata_timing_find_mode(base_mode);
3021 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3022 unsigned short this_cycle;
3023
3024 switch (xfer_shift) {
3025 case ATA_SHIFT_PIO:
3026 case ATA_SHIFT_MWDMA:
3027 this_cycle = t->cycle;
3028 break;
3029 case ATA_SHIFT_UDMA:
3030 this_cycle = t->udma;
3031 break;
3032 default:
3033 return 0xff;
3034 }
3035
3036 if (cycle > this_cycle)
3037 break;
3038
3039 last_mode = t->mode;
3040 }
3041
3042 return last_mode;
3043}
3044
3045/**
Tejun Heocf176e12006-04-02 17:54:46 +09003046 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003047 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003048 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003049 *
3050 * Adjust xfer masks of @dev downward. Note that this function
3051 * does not apply the change. Invoking ata_set_mode() afterwards
3052 * will apply the limit.
3053 *
3054 * LOCKING:
3055 * Inherited from caller.
3056 *
3057 * RETURNS:
3058 * 0 on success, negative errno on failure
3059 */
Tejun Heo458337d2007-02-02 16:22:30 +09003060int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003061{
Tejun Heo458337d2007-02-02 16:22:30 +09003062 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003063 unsigned long orig_mask, xfer_mask;
3064 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003065 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003066
Tejun Heo458337d2007-02-02 16:22:30 +09003067 quiet = !!(sel & ATA_DNXFER_QUIET);
3068 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003069
Tejun Heo458337d2007-02-02 16:22:30 +09003070 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3071 dev->mwdma_mask,
3072 dev->udma_mask);
3073 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003074
Tejun Heo458337d2007-02-02 16:22:30 +09003075 switch (sel) {
3076 case ATA_DNXFER_PIO:
3077 highbit = fls(pio_mask) - 1;
3078 pio_mask &= ~(1 << highbit);
3079 break;
3080
3081 case ATA_DNXFER_DMA:
3082 if (udma_mask) {
3083 highbit = fls(udma_mask) - 1;
3084 udma_mask &= ~(1 << highbit);
3085 if (!udma_mask)
3086 return -ENOENT;
3087 } else if (mwdma_mask) {
3088 highbit = fls(mwdma_mask) - 1;
3089 mwdma_mask &= ~(1 << highbit);
3090 if (!mwdma_mask)
3091 return -ENOENT;
3092 }
3093 break;
3094
3095 case ATA_DNXFER_40C:
3096 udma_mask &= ATA_UDMA_MASK_40C;
3097 break;
3098
3099 case ATA_DNXFER_FORCE_PIO0:
3100 pio_mask &= 1;
3101 case ATA_DNXFER_FORCE_PIO:
3102 mwdma_mask = 0;
3103 udma_mask = 0;
3104 break;
3105
Tejun Heo458337d2007-02-02 16:22:30 +09003106 default:
3107 BUG();
3108 }
3109
3110 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3111
3112 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3113 return -ENOENT;
3114
3115 if (!quiet) {
3116 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3117 snprintf(buf, sizeof(buf), "%s:%s",
3118 ata_mode_string(xfer_mask),
3119 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3120 else
3121 snprintf(buf, sizeof(buf), "%s",
3122 ata_mode_string(xfer_mask));
3123
Joe Perchesa9a79df2011-04-15 15:51:59 -07003124 ata_dev_warn(dev, "limiting speed to %s\n", buf);
Tejun Heo458337d2007-02-02 16:22:30 +09003125 }
Tejun Heocf176e12006-04-02 17:54:46 +09003126
3127 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3128 &dev->udma_mask);
3129
Tejun Heocf176e12006-04-02 17:54:46 +09003130 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003131}
3132
Tejun Heo3373efd2006-05-15 20:57:53 +09003133static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134{
Tejun Heod0cb43b2009-07-09 09:27:50 +09003135 struct ata_port *ap = dev->link->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003136 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003137 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
Tejun Heo4055dee2008-02-07 10:34:08 +09003138 const char *dev_err_whine = "";
3139 int ign_dev_err = 0;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003140 unsigned int err_mask = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003141 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142
Tejun Heoe8384602006-04-02 18:51:53 +09003143 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003144 if (dev->xfer_shift == ATA_SHIFT_PIO)
3145 dev->flags |= ATA_DFLAG_PIO;
3146
Tejun Heod0cb43b2009-07-09 09:27:50 +09003147 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3148 dev_err_whine = " (SET_XFERMODE skipped)";
3149 else {
3150 if (nosetxfer)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003151 ata_dev_warn(dev,
3152 "NOSETXFER but PATA detected - can't "
3153 "skip SETXFER, might malfunction\n");
Tejun Heod0cb43b2009-07-09 09:27:50 +09003154 err_mask = ata_dev_set_xfermode(dev);
3155 }
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003156
Tejun Heo4055dee2008-02-07 10:34:08 +09003157 if (err_mask & ~AC_ERR_DEV)
3158 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003159
Tejun Heo4055dee2008-02-07 10:34:08 +09003160 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003161 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003162 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003163 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003164 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003165 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003166
Alan Coxb93fda12008-04-08 16:36:44 +01003167 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3168 /* Old CFA may refuse this command, which is just fine */
3169 if (ata_id_is_cfa(dev->id))
3170 ign_dev_err = 1;
3171 /* Catch several broken garbage emulations plus some pre
3172 ATA devices */
3173 if (ata_id_major_version(dev->id) == 0 &&
3174 dev->pio_mode <= XFER_PIO_2)
3175 ign_dev_err = 1;
3176 /* Some very old devices and some bad newer ones fail
3177 any kind of SET_XFERMODE request but support PIO0-2
3178 timings and no IORDY */
3179 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3180 ign_dev_err = 1;
3181 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003182 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3183 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3184 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3185 dev->dma_mode == XFER_MW_DMA_0 &&
3186 (dev->id[63] >> 8) & 1)
3187 ign_dev_err = 1;
3188
3189 /* if the device is actually configured correctly, ignore dev err */
3190 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3191 ign_dev_err = 1;
3192
3193 if (err_mask & AC_ERR_DEV) {
3194 if (!ign_dev_err)
3195 goto fail;
3196 else
3197 dev_err_whine = " (device error ignored)";
3198 }
3199
Tejun Heo23e71c32006-03-06 04:31:57 +09003200 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3201 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003202
Joe Perchesa9a79df2011-04-15 15:51:59 -07003203 ata_dev_info(dev, "configured for %s%s\n",
3204 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3205 dev_err_whine);
Tejun Heo4055dee2008-02-07 10:34:08 +09003206
Tejun Heo83206a22006-03-24 15:25:31 +09003207 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003208
3209 fail:
Joe Perchesa9a79df2011-04-15 15:51:59 -07003210 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
Tejun Heo4055dee2008-02-07 10:34:08 +09003211 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212}
3213
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214/**
Alan04351822007-03-06 02:37:52 -08003215 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003216 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003217 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218 *
Alan04351822007-03-06 02:37:52 -08003219 * Standard implementation of the function used to tune and set
3220 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3221 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003222 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003223 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003225 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003226 *
3227 * RETURNS:
3228 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229 */
Alan04351822007-03-06 02:37:52 -08003230
Tejun Heo02607312007-08-06 18:36:23 +09003231int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232{
Tejun Heo02607312007-08-06 18:36:23 +09003233 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003234 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003235 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003236
Tejun Heoa6d5a512006-03-06 04:31:57 +09003237 /* step 1: calculate xfer_mask */
Tejun Heo1eca4362008-11-03 20:03:17 +09003238 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003239 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003240 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003241
Alan Coxb3a70602007-10-02 12:38:26 -04003242 mode_mask = ATA_DMA_MASK_ATA;
3243 if (dev->class == ATA_DEV_ATAPI)
3244 mode_mask = ATA_DMA_MASK_ATAPI;
3245 else if (ata_id_is_cfa(dev->id))
3246 mode_mask = ATA_DMA_MASK_CFA;
3247
Tejun Heo3373efd2006-05-15 20:57:53 +09003248 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003249 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003250
Tejun Heoacf356b2006-03-24 14:07:50 +09003251 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
Alan Coxb3a70602007-10-02 12:38:26 -04003252
3253 if (libata_dma_mask & mode_mask)
Sergei Shtylyov80a9c432011-12-22 22:41:32 +03003254 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3255 dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003256 else
3257 dma_mask = 0;
3258
Tejun Heoacf356b2006-03-24 14:07:50 +09003259 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3260 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003261
Tejun Heo4f659772006-04-01 01:38:18 +09003262 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003263 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003264 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003265 }
Tejun Heo4f659772006-04-01 01:38:18 +09003266 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003267 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003268
3269 /* step 2: always set host PIO timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003270 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo70cd0712007-11-27 19:43:40 +09003271 if (dev->pio_mode == 0xff) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003272 ata_dev_warn(dev, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003273 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003274 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003275 }
3276
3277 dev->xfer_mode = dev->pio_mode;
3278 dev->xfer_shift = ATA_SHIFT_PIO;
3279 if (ap->ops->set_piomode)
3280 ap->ops->set_piomode(ap, dev);
3281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003282
Tejun Heoa6d5a512006-03-06 04:31:57 +09003283 /* step 3: set host DMA timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003284 ata_for_each_dev(dev, link, ENABLED) {
3285 if (!ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003286 continue;
3287
3288 dev->xfer_mode = dev->dma_mode;
3289 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3290 if (ap->ops->set_dmamode)
3291 ap->ops->set_dmamode(ap, dev);
3292 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003293
3294 /* step 4: update devices' xfer mode */
Tejun Heo1eca4362008-11-03 20:03:17 +09003295 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo3373efd2006-05-15 20:57:53 +09003296 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003297 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003298 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003300
Tejun Heoe8e06192006-04-01 01:38:18 +09003301 /* Record simplex status. If we selected DMA then the other
3302 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003303 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003304 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003305 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003306
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003307 out:
3308 if (rc)
3309 *r_failed_dev = dev;
3310 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311}
3312
3313/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003314 * ata_wait_ready - wait for link to become ready
3315 * @link: link to be waited on
3316 * @deadline: deadline jiffies for the operation
3317 * @check_ready: callback to check link readiness
3318 *
3319 * Wait for @link to become ready. @check_ready should return
3320 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3321 * link doesn't seem to be occupied, other errno for other error
3322 * conditions.
3323 *
3324 * Transient -ENODEV conditions are allowed for
3325 * ATA_TMOUT_FF_WAIT.
3326 *
3327 * LOCKING:
3328 * EH context.
3329 *
3330 * RETURNS:
3331 * 0 if @linke is ready before @deadline; otherwise, -errno.
3332 */
3333int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3334 int (*check_ready)(struct ata_link *link))
3335{
3336 unsigned long start = jiffies;
Tejun Heob48d58f2010-04-09 19:46:38 +09003337 unsigned long nodev_deadline;
Tejun Heoaa2731a2008-04-07 22:47:19 +09003338 int warned = 0;
3339
Tejun Heob48d58f2010-04-09 19:46:38 +09003340 /* choose which 0xff timeout to use, read comment in libata.h */
3341 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3342 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3343 else
3344 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3345
Tejun Heob1c72912008-07-31 17:02:43 +09003346 /* Slave readiness can't be tested separately from master. On
3347 * M/S emulation configuration, this function should be called
3348 * only on the master and it will handle both master and slave.
3349 */
3350 WARN_ON(link == link->ap->slave_link);
3351
Tejun Heoaa2731a2008-04-07 22:47:19 +09003352 if (time_after(nodev_deadline, deadline))
3353 nodev_deadline = deadline;
3354
3355 while (1) {
3356 unsigned long now = jiffies;
3357 int ready, tmp;
3358
3359 ready = tmp = check_ready(link);
3360 if (ready > 0)
3361 return 0;
3362
Tejun Heob48d58f2010-04-09 19:46:38 +09003363 /*
3364 * -ENODEV could be transient. Ignore -ENODEV if link
Tejun Heoaa2731a2008-04-07 22:47:19 +09003365 * is online. Also, some SATA devices take a long
Tejun Heob48d58f2010-04-09 19:46:38 +09003366 * time to clear 0xff after reset. Wait for
3367 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3368 * offline.
Tejun Heoaa2731a2008-04-07 22:47:19 +09003369 *
3370 * Note that some PATA controllers (pata_ali) explode
3371 * if status register is read more than once when
3372 * there's no device attached.
3373 */
3374 if (ready == -ENODEV) {
3375 if (ata_link_online(link))
3376 ready = 0;
3377 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3378 !ata_link_offline(link) &&
3379 time_before(now, nodev_deadline))
3380 ready = 0;
3381 }
3382
3383 if (ready)
3384 return ready;
3385 if (time_after(now, deadline))
3386 return -EBUSY;
3387
3388 if (!warned && time_after(now, start + 5 * HZ) &&
3389 (deadline - now > 3 * HZ)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003390 ata_link_warn(link,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003391 "link is slow to respond, please be patient "
3392 "(ready=%d)\n", tmp);
3393 warned = 1;
3394 }
3395
Tejun Heo97750ce2010-09-06 17:56:29 +02003396 ata_msleep(link->ap, 50);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003397 }
3398}
3399
3400/**
3401 * ata_wait_after_reset - wait for link to become ready after reset
3402 * @link: link to be waited on
3403 * @deadline: deadline jiffies for the operation
3404 * @check_ready: callback to check link readiness
3405 *
3406 * Wait for @link to become ready after reset.
3407 *
3408 * LOCKING:
3409 * EH context.
3410 *
3411 * RETURNS:
3412 * 0 if @linke is ready before @deadline; otherwise, -errno.
3413 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003414int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003415 int (*check_ready)(struct ata_link *link))
3416{
Tejun Heo97750ce2010-09-06 17:56:29 +02003417 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003418
3419 return ata_wait_ready(link, deadline, check_ready);
3420}
3421
3422/**
Tejun Heo936fd732007-08-06 18:36:23 +09003423 * sata_link_debounce - debounce SATA phy status
3424 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003425 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003426 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003427 *
Tejun Heo1152b262010-09-01 17:50:05 +02003428 * Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003429 * holding the same value where DET is not 1 for @duration polled
3430 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003431 * beginning of the stable state. Because DET gets stuck at 1 on
3432 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003433 * until timeout then returns 0 if DET is stable at 1.
3434 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003435 * @timeout is further limited by @deadline. The sooner of the
3436 * two is used.
3437 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003438 * LOCKING:
3439 * Kernel thread context (may sleep)
3440 *
3441 * RETURNS:
3442 * 0 on success, -errno on failure.
3443 */
Tejun Heo936fd732007-08-06 18:36:23 +09003444int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3445 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003446{
Tejun Heo341c2c92008-05-20 02:17:51 +09003447 unsigned long interval = params[0];
3448 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003449 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003450 u32 last, cur;
3451 int rc;
3452
Tejun Heo341c2c92008-05-20 02:17:51 +09003453 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003454 if (time_before(t, deadline))
3455 deadline = t;
3456
Tejun Heo936fd732007-08-06 18:36:23 +09003457 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003458 return rc;
3459 cur &= 0xf;
3460
3461 last = cur;
3462 last_jiffies = jiffies;
3463
3464 while (1) {
Tejun Heo97750ce2010-09-06 17:56:29 +02003465 ata_msleep(link->ap, interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003466 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003467 return rc;
3468 cur &= 0xf;
3469
3470 /* DET stable? */
3471 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003472 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003473 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003474 if (time_after(jiffies,
3475 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003476 return 0;
3477 continue;
3478 }
3479
3480 /* unstable, start over */
3481 last = cur;
3482 last_jiffies = jiffies;
3483
Tejun Heof1545152007-07-16 14:29:40 +09003484 /* Check deadline. If debouncing failed, return
3485 * -EPIPE to tell upper layer to lower link speed.
3486 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003487 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003488 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003489 }
3490}
3491
3492/**
Tejun Heo936fd732007-08-06 18:36:23 +09003493 * sata_link_resume - resume SATA link
3494 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003495 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003496 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003497 *
Tejun Heo936fd732007-08-06 18:36:23 +09003498 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003499 *
3500 * LOCKING:
3501 * Kernel thread context (may sleep)
3502 *
3503 * RETURNS:
3504 * 0 on success, -errno on failure.
3505 */
Tejun Heo936fd732007-08-06 18:36:23 +09003506int sata_link_resume(struct ata_link *link, const unsigned long *params,
3507 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003508{
Tejun Heo5040ab62010-01-11 11:14:44 +09003509 int tries = ATA_LINK_RESUME_TRIES;
Tejun Heoac371982008-04-07 22:47:19 +09003510 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003511 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003512
Tejun Heo936fd732007-08-06 18:36:23 +09003513 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003514 return rc;
3515
Tejun Heo5040ab62010-01-11 11:14:44 +09003516 /*
3517 * Writes to SControl sometimes get ignored under certain
3518 * controllers (ata_piix SIDPR). Make sure DET actually is
3519 * cleared.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003520 */
Tejun Heo5040ab62010-01-11 11:14:44 +09003521 do {
3522 scontrol = (scontrol & 0x0f0) | 0x300;
3523 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3524 return rc;
3525 /*
3526 * Some PHYs react badly if SStatus is pounded
3527 * immediately after resuming. Delay 200ms before
3528 * debouncing.
3529 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003530 ata_msleep(link->ap, 200);
Tejun Heo5040ab62010-01-11 11:14:44 +09003531
3532 /* is SControl restored correctly? */
3533 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3534 return rc;
3535 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3536
3537 if ((scontrol & 0xf0f) != 0x300) {
Tejun Heo38941c92011-07-01 15:12:09 +02003538 ata_link_warn(link, "failed to resume link (SControl %X)\n",
Joe Perchesa9a79df2011-04-15 15:51:59 -07003539 scontrol);
Tejun Heo5040ab62010-01-11 11:14:44 +09003540 return 0;
3541 }
3542
3543 if (tries < ATA_LINK_RESUME_TRIES)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003544 ata_link_warn(link, "link resume succeeded after %d retries\n",
3545 ATA_LINK_RESUME_TRIES - tries);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003546
Tejun Heoac371982008-04-07 22:47:19 +09003547 if ((rc = sata_link_debounce(link, params, deadline)))
3548 return rc;
3549
Tejun Heof0465192008-05-19 01:15:08 +09003550 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003551 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3552 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003553
Tejun Heof0465192008-05-19 01:15:08 +09003554 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003555}
3556
Tejun Heof5914a42006-05-31 18:27:48 +09003557/**
Tejun Heo1152b262010-09-01 17:50:05 +02003558 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3559 * @link: ATA link to manipulate SControl for
3560 * @policy: LPM policy to configure
3561 * @spm_wakeup: initiate LPM transition to active state
3562 *
3563 * Manipulate the IPM field of the SControl register of @link
3564 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3565 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3566 * the link. This function also clears PHYRDY_CHG before
3567 * returning.
3568 *
3569 * LOCKING:
3570 * EH context.
3571 *
3572 * RETURNS:
3573 * 0 on succes, -errno otherwise.
3574 */
3575int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3576 bool spm_wakeup)
3577{
3578 struct ata_eh_context *ehc = &link->eh_context;
3579 bool woken_up = false;
3580 u32 scontrol;
3581 int rc;
3582
3583 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3584 if (rc)
3585 return rc;
3586
3587 switch (policy) {
3588 case ATA_LPM_MAX_POWER:
3589 /* disable all LPM transitions */
3590 scontrol |= (0x3 << 8);
3591 /* initiate transition to active state */
3592 if (spm_wakeup) {
3593 scontrol |= (0x4 << 12);
3594 woken_up = true;
3595 }
3596 break;
3597 case ATA_LPM_MED_POWER:
3598 /* allow LPM to PARTIAL */
3599 scontrol &= ~(0x1 << 8);
3600 scontrol |= (0x2 << 8);
3601 break;
3602 case ATA_LPM_MIN_POWER:
Kristen Carlson Accardi8a745f12011-03-04 10:24:11 -08003603 if (ata_link_nr_enabled(link) > 0)
3604 /* no restrictions on LPM transitions */
3605 scontrol &= ~(0x3 << 8);
3606 else {
3607 /* empty port, power off */
3608 scontrol &= ~0xf;
3609 scontrol |= (0x1 << 2);
3610 }
Tejun Heo1152b262010-09-01 17:50:05 +02003611 break;
3612 default:
3613 WARN_ON(1);
3614 }
3615
3616 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3617 if (rc)
3618 return rc;
3619
3620 /* give the link time to transit out of LPM state */
3621 if (woken_up)
3622 msleep(10);
3623
3624 /* clear PHYRDY_CHG from SError */
3625 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3626 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3627}
3628
3629/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003630 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003631 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003632 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003633 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003634 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003635 * prereset makes libata abort whole reset sequence and give up
3636 * that port, so prereset should be best-effort. It does its
3637 * best to prepare for reset sequence but if things go wrong, it
3638 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003639 *
3640 * LOCKING:
3641 * Kernel thread context (may sleep)
3642 *
3643 * RETURNS:
3644 * 0 on success, -errno otherwise.
3645 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003646int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003647{
Tejun Heocc0680a2007-08-06 18:36:23 +09003648 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003649 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003650 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003651 int rc;
3652
Tejun Heof5914a42006-05-31 18:27:48 +09003653 /* if we're about to do hardreset, nothing more to do */
3654 if (ehc->i.action & ATA_EH_HARDRESET)
3655 return 0;
3656
Tejun Heo936fd732007-08-06 18:36:23 +09003657 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003658 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003659 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003660 /* whine about phy resume failure but proceed */
3661 if (rc && rc != -EOPNOTSUPP)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003662 ata_link_warn(link,
3663 "failed to resume link for reset (errno=%d)\n",
3664 rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003665 }
3666
Tejun Heo45db2f62008-04-08 01:46:56 +09003667 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003668 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003669 ehc->i.action &= ~ATA_EH_SOFTRESET;
3670
Tejun Heof5914a42006-05-31 18:27:48 +09003671 return 0;
3672}
3673
Tejun Heoc2bd5802006-01-24 17:05:22 +09003674/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003675 * sata_link_hardreset - reset link via SATA phy reset
3676 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003677 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003678 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003679 * @online: optional out parameter indicating link onlineness
3680 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003681 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003682 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003683 * After hardreset, link readiness is waited upon using
3684 * ata_wait_ready() if @check_ready is specified. LLDs are
3685 * allowed to not specify @check_ready and wait itself after this
3686 * function returns. Device classification is LLD's
3687 * responsibility.
3688 *
3689 * *@online is set to one iff reset succeeded and @link is online
3690 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003691 *
3692 * LOCKING:
3693 * Kernel thread context (may sleep)
3694 *
3695 * RETURNS:
3696 * 0 on success, -errno otherwise.
3697 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003698int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003699 unsigned long deadline,
3700 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003701{
Tejun Heo852ee162006-04-01 01:38:18 +09003702 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003703 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003704
Tejun Heoc2bd5802006-01-24 17:05:22 +09003705 DPRINTK("ENTER\n");
3706
Tejun Heo9dadd452008-04-07 22:47:19 +09003707 if (online)
3708 *online = false;
3709
Tejun Heo936fd732007-08-06 18:36:23 +09003710 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003711 /* SATA spec says nothing about how to reconfigure
3712 * spd. To be on the safe side, turn off phy during
3713 * reconfiguration. This works for at least ICH7 AHCI
3714 * and Sil3124.
3715 */
Tejun Heo936fd732007-08-06 18:36:23 +09003716 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003717 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003718
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003719 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003720
Tejun Heo936fd732007-08-06 18:36:23 +09003721 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003722 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003723
Tejun Heo936fd732007-08-06 18:36:23 +09003724 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003725 }
3726
3727 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003728 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003729 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003730
Tejun Heo852ee162006-04-01 01:38:18 +09003731 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003732
Tejun Heo936fd732007-08-06 18:36:23 +09003733 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003734 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003735
Tejun Heo1c3fae42006-04-02 20:53:28 +09003736 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003737 * 10.4.2 says at least 1 ms.
3738 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003739 ata_msleep(link->ap, 1);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003740
Tejun Heo936fd732007-08-06 18:36:23 +09003741 /* bring link back */
3742 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003743 if (rc)
3744 goto out;
3745 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003746 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003747 goto out;
3748
3749 /* Link is online. From this point, -ENODEV too is an error. */
3750 if (online)
3751 *online = true;
3752
Tejun Heo071f44b2008-04-07 22:47:22 +09003753 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003754 /* If PMP is supported, we have to do follow-up SRST.
3755 * Some PMPs don't send D2H Reg FIS after hardreset if
3756 * the first port is empty. Wait only for
3757 * ATA_TMOUT_PMP_SRST_WAIT.
3758 */
3759 if (check_ready) {
3760 unsigned long pmp_deadline;
3761
Tejun Heo341c2c92008-05-20 02:17:51 +09003762 pmp_deadline = ata_deadline(jiffies,
3763 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003764 if (time_after(pmp_deadline, deadline))
3765 pmp_deadline = deadline;
3766 ata_wait_ready(link, pmp_deadline, check_ready);
3767 }
3768 rc = -EAGAIN;
3769 goto out;
3770 }
3771
3772 rc = 0;
3773 if (check_ready)
3774 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003775 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003776 if (rc && rc != -EAGAIN) {
3777 /* online is set iff link is online && reset succeeded */
3778 if (online)
3779 *online = false;
Joe Perchesa9a79df2011-04-15 15:51:59 -07003780 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003781 }
Tejun Heob6103f62006-11-01 17:59:53 +09003782 DPRINTK("EXIT, rc=%d\n", rc);
3783 return rc;
3784}
3785
3786/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003787 * sata_std_hardreset - COMRESET w/o waiting or classification
3788 * @link: link to reset
3789 * @class: resulting class of attached device
3790 * @deadline: deadline jiffies for the operation
3791 *
3792 * Standard SATA COMRESET w/o waiting or classification.
3793 *
3794 * LOCKING:
3795 * Kernel thread context (may sleep)
3796 *
3797 * RETURNS:
3798 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3799 */
3800int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3801 unsigned long deadline)
3802{
3803 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3804 bool online;
3805 int rc;
3806
3807 /* do hardreset */
3808 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003809 return online ? -EAGAIN : rc;
3810}
3811
3812/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003813 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003814 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003815 * @classes: classes of attached devices
3816 *
3817 * This function is invoked after a successful reset. Note that
3818 * the device might have been reset more than once using
3819 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003820 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003821 * LOCKING:
3822 * Kernel thread context (may sleep)
3823 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003824void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003825{
Tejun Heof0465192008-05-19 01:15:08 +09003826 u32 serror;
3827
Tejun Heoc2bd5802006-01-24 17:05:22 +09003828 DPRINTK("ENTER\n");
3829
Tejun Heof0465192008-05-19 01:15:08 +09003830 /* reset complete, clear SError */
3831 if (!sata_scr_read(link, SCR_ERROR, &serror))
3832 sata_scr_write(link, SCR_ERROR, serror);
3833
Tejun Heoc2bd5802006-01-24 17:05:22 +09003834 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003835 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003836
Tejun Heoc2bd5802006-01-24 17:05:22 +09003837 DPRINTK("EXIT\n");
3838}
3839
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003840/**
Tejun Heo623a3122006-03-05 17:55:58 +09003841 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003842 * @dev: device to compare against
3843 * @new_class: class of the new device
3844 * @new_id: IDENTIFY page of the new device
3845 *
3846 * Compare @new_class and @new_id against @dev and determine
3847 * whether @dev is the device indicated by @new_class and
3848 * @new_id.
3849 *
3850 * LOCKING:
3851 * None.
3852 *
3853 * RETURNS:
3854 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3855 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003856static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3857 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003858{
3859 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003860 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3861 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003862
3863 if (dev->class != new_class) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003864 ata_dev_info(dev, "class mismatch %d != %d\n",
3865 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003866 return 0;
3867 }
3868
Tejun Heoa0cf7332007-01-02 20:18:49 +09003869 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3870 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3871 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3872 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003873
3874 if (strcmp(model[0], model[1])) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003875 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3876 model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003877 return 0;
3878 }
3879
3880 if (strcmp(serial[0], serial[1])) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003881 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3882 serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003883 return 0;
3884 }
3885
Tejun Heo623a3122006-03-05 17:55:58 +09003886 return 1;
3887}
3888
3889/**
Tejun Heofe309112007-05-15 03:28:15 +09003890 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003891 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003892 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003893 *
3894 * Re-read IDENTIFY page and make sure @dev is still attached to
3895 * the port.
3896 *
3897 * LOCKING:
3898 * Kernel thread context (may sleep)
3899 *
3900 * RETURNS:
3901 * 0 on success, negative errno otherwise
3902 */
Tejun Heofe309112007-05-15 03:28:15 +09003903int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003904{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003905 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003906 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003907 int rc;
3908
Tejun Heofe635c72006-05-15 20:57:35 +09003909 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003910 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003911 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003912 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003913
3914 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003915 if (!ata_dev_same_device(dev, class, id))
3916 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003917
Tejun Heofe635c72006-05-15 20:57:35 +09003918 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003919 return 0;
3920}
3921
3922/**
3923 * ata_dev_revalidate - Revalidate ATA device
3924 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09003925 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09003926 * @readid_flags: read ID flags
3927 *
3928 * Re-read IDENTIFY page, make sure @dev is still attached to the
3929 * port and reconfigure it according to the new IDENTIFY page.
3930 *
3931 * LOCKING:
3932 * Kernel thread context (may sleep)
3933 *
3934 * RETURNS:
3935 * 0 on success, negative errno otherwise
3936 */
Tejun Heo422c9da2007-09-23 13:14:12 +09003937int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3938 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09003939{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003940 u64 n_sectors = dev->n_sectors;
Tejun Heo5920dad2009-07-15 17:11:41 +09003941 u64 n_native_sectors = dev->n_native_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003942 int rc;
3943
3944 if (!ata_dev_enabled(dev))
3945 return -ENODEV;
3946
Tejun Heo422c9da2007-09-23 13:14:12 +09003947 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3948 if (ata_class_enabled(new_class) &&
Borislav Petkovf0d06132009-04-26 16:33:34 +02003949 new_class != ATA_DEV_ATA &&
3950 new_class != ATA_DEV_ATAPI &&
3951 new_class != ATA_DEV_SEMB) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003952 ata_dev_info(dev, "class mismatch %u != %u\n",
3953 dev->class, new_class);
Tejun Heo422c9da2007-09-23 13:14:12 +09003954 rc = -ENODEV;
3955 goto fail;
3956 }
3957
Tejun Heofe309112007-05-15 03:28:15 +09003958 /* re-read ID */
3959 rc = ata_dev_reread_id(dev, readid_flags);
3960 if (rc)
3961 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09003962
3963 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003964 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003965 if (rc)
3966 goto fail;
3967
3968 /* verify n_sectors hasn't changed */
Tejun Heo445d2112010-04-05 10:33:13 +09003969 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3970 dev->n_sectors == n_sectors)
3971 return 0;
3972
3973 /* n_sectors has changed */
Joe Perchesa9a79df2011-04-15 15:51:59 -07003974 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3975 (unsigned long long)n_sectors,
3976 (unsigned long long)dev->n_sectors);
Tejun Heo445d2112010-04-05 10:33:13 +09003977
3978 /*
3979 * Something could have caused HPA to be unlocked
3980 * involuntarily. If n_native_sectors hasn't changed and the
3981 * new size matches it, keep the device.
3982 */
3983 if (dev->n_native_sectors == n_native_sectors &&
3984 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003985 ata_dev_warn(dev,
3986 "new n_sectors matches native, probably "
3987 "late HPA unlock, n_sectors updated\n");
Tejun Heo68939ce2010-05-15 20:09:33 +02003988 /* use the larger n_sectors */
Tejun Heo445d2112010-04-05 10:33:13 +09003989 return 0;
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003990 }
3991
Tejun Heo445d2112010-04-05 10:33:13 +09003992 /*
3993 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3994 * unlocking HPA in those cases.
3995 *
3996 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3997 */
3998 if (dev->n_native_sectors == n_native_sectors &&
3999 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4000 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004001 ata_dev_warn(dev,
4002 "old n_sectors matches native, probably "
4003 "late HPA lock, will try to unlock HPA\n");
Tejun Heo445d2112010-04-05 10:33:13 +09004004 /* try unlocking HPA */
4005 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4006 rc = -EIO;
4007 } else
4008 rc = -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09004009
Tejun Heo445d2112010-04-05 10:33:13 +09004010 /* restore original n_[native_]sectors and fail */
4011 dev->n_native_sectors = n_native_sectors;
4012 dev->n_sectors = n_sectors;
Tejun Heo623a3122006-03-05 17:55:58 +09004013 fail:
Joe Perchesa9a79df2011-04-15 15:51:59 -07004014 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09004015 return rc;
4016}
4017
Alan Cox6919a0a2006-10-27 19:08:46 -07004018struct ata_blacklist_entry {
4019 const char *model_num;
4020 const char *model_rev;
4021 unsigned long horkage;
4022};
4023
4024static const struct ata_blacklist_entry ata_device_blacklist [] = {
4025 /* Devices with DMA related problems under Linux */
4026 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4027 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4028 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4029 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4030 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4031 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4032 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4033 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4034 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004035 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004036 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4037 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4038 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4039 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4040 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004041 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004042 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4043 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4044 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4045 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4046 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4047 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4048 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4049 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004050 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4051 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004052 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004053 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004054 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004055 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004056
Albert Lee18d6e9d2007-04-02 11:34:15 +08004057 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004058 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004059 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004060
Alan Cox6919a0a2006-10-27 19:08:46 -07004061 /* Devices we expect to fail diagnostics */
4062
4063 /* Devices where NCQ should be avoided */
4064 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004065 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004066 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004067 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4068 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004069 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004070 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004071 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004072 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004073 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Lubomir Bulej5ccfca92008-12-22 11:35:22 +01004074 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004075
Tejun Heoac70a962008-11-27 13:36:48 +09004076 /* Seagate NCQ + FLUSH CACHE firmware bug */
Mark Lord4d1f9082010-07-05 18:53:37 -04004077 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004078 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004079
Mark Lord4d1f9082010-07-05 18:53:37 -04004080 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004081 ATA_HORKAGE_FIRMWARE_WARN },
4082
Mark Lord4d1f9082010-07-05 18:53:37 -04004083 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004084 ATA_HORKAGE_FIRMWARE_WARN },
4085
Mark Lord4d1f9082010-07-05 18:53:37 -04004086 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004087 ATA_HORKAGE_FIRMWARE_WARN },
4088
Robert Hancock36e337d2007-04-02 22:05:29 -06004089 /* Blacklist entries taken from Silicon Image 3124/3132
4090 Windows driver .inf file - also several Linux problem reports */
4091 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4092 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4093 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004094
Tejun Heo68b0ddb2010-04-05 10:51:26 +09004095 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4096 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4097
Tejun Heo16c55b02007-08-29 11:58:33 +09004098 /* devices which puke on READ_NATIVE_MAX */
4099 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4100 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4101 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4102 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004103
Tejun Heo78313872009-08-07 01:59:15 +09004104 /* this one allows HPA unlocking but fails IOs on the area */
4105 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4106
Alan Cox93328e12007-09-29 04:06:48 -04004107 /* Devices which report 1 sector over size HPA */
4108 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4109 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004110 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004111
Alan Cox6bbfd532007-11-05 22:58:58 +00004112 /* Devices which get the IVB wrong */
4113 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004114 /* Maybe we should just blacklist TSSTcorp... */
Mark Lord7da4c932010-07-01 18:18:12 -04004115 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004116
Jens Axboe9ce8e302008-08-27 15:23:18 +02004117 /* Devices that do not need bridging limits applied */
4118 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4119
Tejun Heo90627122009-01-29 20:31:36 +09004120 /* Devices which aren't very happy with higher link speeds */
4121 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4122
Tejun Heod0cb43b2009-07-09 09:27:50 +09004123 /*
4124 * Devices which choke on SETXFER. Applies only if both the
4125 * device and controller are SATA.
4126 */
Tejun Heocd691872011-06-22 12:13:10 +02004127 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
Vladimir LAVALLADE3a251792012-01-08 13:50:13 +01004128 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4129 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
Tejun Heocd691872011-06-22 12:13:10 +02004130 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4131 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
Tejun Heod0cb43b2009-07-09 09:27:50 +09004132
Alan Cox6919a0a2006-10-27 19:08:46 -07004133 /* End Marker */
4134 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004135};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004136
Mark Lordbce036c2010-07-01 18:16:14 -04004137/**
4138 * glob_match - match a text string against a glob-style pattern
4139 * @text: the string to be examined
4140 * @pattern: the glob-style pattern to be matched against
4141 *
4142 * Either/both of text and pattern can be empty strings.
4143 *
4144 * Match text against a glob-style pattern, with wildcards and simple sets:
4145 *
4146 * ? matches any single character.
4147 * * matches any run of characters.
4148 * [xyz] matches a single character from the set: x, y, or z.
Mark Lord2f9e4d12010-07-05 10:25:45 -04004149 * [a-d] matches a single character from the range: a, b, c, or d.
4150 * [a-d0-9] matches a single character from either range.
Mark Lordbce036c2010-07-01 18:16:14 -04004151 *
Mark Lord2f9e4d12010-07-05 10:25:45 -04004152 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4153 * Behaviour with malformed patterns is undefined, though generally reasonable.
Mark Lordbce036c2010-07-01 18:16:14 -04004154 *
Randy Dunlap3d2be542010-08-09 16:28:30 -07004155 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
Mark Lordbce036c2010-07-01 18:16:14 -04004156 *
4157 * This function uses one level of recursion per '*' in pattern.
4158 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4159 * this will not cause stack problems for any reasonable use here.
4160 *
4161 * RETURNS:
4162 * 0 on match, 1 otherwise.
4163 */
4164static int glob_match (const char *text, const char *pattern)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004165{
Mark Lordbce036c2010-07-01 18:16:14 -04004166 do {
4167 /* Match single character or a '?' wildcard */
4168 if (*text == *pattern || *pattern == '?') {
4169 if (!*pattern++)
4170 return 0; /* End of both strings: match */
4171 } else {
4172 /* Match single char against a '[' bracketed ']' pattern set */
4173 if (!*text || *pattern != '[')
4174 break; /* Not a pattern set */
Mark Lord2f9e4d12010-07-05 10:25:45 -04004175 while (*++pattern && *pattern != ']' && *text != *pattern) {
4176 if (*pattern == '-' && *(pattern - 1) != '[')
4177 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4178 ++pattern;
4179 break;
4180 }
4181 }
Mark Lordbce036c2010-07-01 18:16:14 -04004182 if (!*pattern || *pattern == ']')
4183 return 1; /* No match */
4184 while (*pattern && *pattern++ != ']');
4185 }
4186 } while (*++text && *pattern);
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004187
Mark Lordbce036c2010-07-01 18:16:14 -04004188 /* Match any run of chars against a '*' wildcard */
4189 if (*pattern == '*') {
4190 if (!*++pattern)
4191 return 0; /* Match: avoid recursion at end of pattern */
4192 /* Loop to handle additional pattern chars after the wildcard */
4193 while (*text) {
4194 if (glob_match(text, pattern) == 0)
4195 return 0; /* Remainder matched */
4196 ++text; /* Absorb (match) this char and try again */
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004197 }
4198 }
Mark Lordbce036c2010-07-01 18:16:14 -04004199 if (!*text && !*pattern)
4200 return 0; /* End of both strings: match */
4201 return 1; /* No match */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004202}
Jeff Garzik4fca3772011-02-15 01:13:24 -05004203
Tejun Heo75683fe2007-07-05 13:31:27 +09004204static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004206 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4207 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004208 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004209
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004210 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4211 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004212
Alan Cox6919a0a2006-10-27 19:08:46 -07004213 while (ad->model_num) {
Mark Lordbce036c2010-07-01 18:16:14 -04004214 if (!glob_match(model_num, ad->model_num)) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004215 if (ad->model_rev == NULL)
4216 return ad->horkage;
Mark Lordbce036c2010-07-01 18:16:14 -04004217 if (!glob_match(model_rev, ad->model_rev))
Alan Cox6919a0a2006-10-27 19:08:46 -07004218 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004219 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004220 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004221 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004222 return 0;
4223}
4224
Alan Cox6919a0a2006-10-27 19:08:46 -07004225static int ata_dma_blacklisted(const struct ata_device *dev)
4226{
4227 /* We don't support polling DMA.
4228 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4229 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4230 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004231 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004232 (dev->flags & ATA_DFLAG_CDB_INTR))
4233 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004234 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004235}
4236
Tejun Heoa6d5a512006-03-06 04:31:57 +09004237/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004238 * ata_is_40wire - check drive side detection
4239 * @dev: device
4240 *
4241 * Perform drive side detection decoding, allowing for device vendors
4242 * who can't follow the documentation.
4243 */
4244
4245static int ata_is_40wire(struct ata_device *dev)
4246{
4247 if (dev->horkage & ATA_HORKAGE_IVB)
4248 return ata_drive_40wire_relaxed(dev->id);
4249 return ata_drive_40wire(dev->id);
4250}
4251
4252/**
Alan Cox15a55512008-03-28 14:33:46 -07004253 * cable_is_40wire - 40/80/SATA decider
4254 * @ap: port to consider
4255 *
4256 * This function encapsulates the policy for speed management
4257 * in one place. At the moment we don't cache the result but
4258 * there is a good case for setting ap->cbl to the result when
4259 * we are called with unknown cables (and figuring out if it
4260 * impacts hotplug at all).
4261 *
4262 * Return 1 if the cable appears to be 40 wire.
4263 */
4264
4265static int cable_is_40wire(struct ata_port *ap)
4266{
4267 struct ata_link *link;
4268 struct ata_device *dev;
4269
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004270 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004271 if (ap->cbl == ATA_CBL_PATA40)
4272 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004273
4274 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004275 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4276 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004277
4278 /* If the system is known to be 40 wire short cable (eg
4279 * laptop), then we allow 80 wire modes even if the drive
4280 * isn't sure.
4281 */
Alan Coxf7920682008-04-08 16:37:50 +01004282 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4283 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004284
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004285 /* If the controller doesn't know, we scan.
4286 *
4287 * Note: We look for all 40 wire detects at this point. Any
4288 * 80 wire detect is taken to be 80 wire cable because
4289 * - in many setups only the one drive (slave if present) will
4290 * give a valid detect
4291 * - if you have a non detect capable drive you don't want it
4292 * to colour the choice
4293 */
Tejun Heo1eca4362008-11-03 20:03:17 +09004294 ata_for_each_link(link, ap, EDGE) {
4295 ata_for_each_dev(dev, link, ENABLED) {
4296 if (!ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004297 return 0;
4298 }
4299 }
4300 return 1;
4301}
4302
4303/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004304 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004305 * @dev: Device to compute xfermask for
4306 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004307 * Compute supported xfermask of @dev and store it in
4308 * dev->*_mask. This function is responsible for applying all
4309 * known limits including host controller limits, device
4310 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004311 *
4312 * LOCKING:
4313 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004314 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004315static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004316{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004317 struct ata_link *link = dev->link;
4318 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004319 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004320 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004321
Tejun Heo37deecb2006-08-10 16:59:07 +09004322 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004323 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4324 ap->mwdma_mask, ap->udma_mask);
4325
Robert Hancock8343f882007-03-06 02:37:51 -08004326 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004327 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4328 dev->mwdma_mask, dev->udma_mask);
4329 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004330
Alan Coxb352e572006-08-10 18:52:12 +01004331 /*
4332 * CFA Advanced TrueIDE timings are not allowed on a shared
4333 * cable
4334 */
4335 if (ata_dev_pair(dev)) {
4336 /* No PIO5 or PIO6 */
4337 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4338 /* No MWDMA3 or MWDMA 4 */
4339 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4340 }
4341
Tejun Heo37deecb2006-08-10 16:59:07 +09004342 if (ata_dma_blacklisted(dev)) {
4343 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Joe Perchesa9a79df2011-04-15 15:51:59 -07004344 ata_dev_warn(dev,
4345 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004346 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004347
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004348 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004349 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004350 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Joe Perchesa9a79df2011-04-15 15:51:59 -07004351 ata_dev_warn(dev,
4352 "simplex DMA is claimed by other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004353 }
Tejun Heo565083e2006-04-02 17:54:47 +09004354
Jeff Garzike4246752007-03-09 09:56:46 -05004355 if (ap->flags & ATA_FLAG_NO_IORDY)
4356 xfer_mask &= ata_pio_mask_no_iordy(dev);
4357
Alan Cox5444a6f2006-03-27 18:58:20 +01004358 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004359 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004360
Robert Hancock8343f882007-03-06 02:37:51 -08004361 /* Apply cable rule here. Don't apply it early because when
4362 * we handle hot plug the cable type can itself change.
4363 * Check this last so that we know if the transfer rate was
4364 * solely limited by the cable.
4365 * Unknown or 80 wire cables reported host side are checked
4366 * drive side as well. Cases where we know a 40wire cable
4367 * is used safely for 80 are not checked here.
4368 */
4369 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4370 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004371 if (cable_is_40wire(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004372 ata_dev_warn(dev,
4373 "limited to UDMA/33 due to 40-wire cable\n");
Robert Hancock8343f882007-03-06 02:37:51 -08004374 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4375 }
4376
Tejun Heo565083e2006-04-02 17:54:47 +09004377 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4378 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004379}
4380
Linus Torvalds1da177e2005-04-16 15:20:36 -07004381/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004382 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004383 * @dev: Device to which command will be sent
4384 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004385 * Issue SET FEATURES - XFER MODE command to device @dev
4386 * on port @ap.
4387 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004388 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004389 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004390 *
4391 * RETURNS:
4392 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004393 */
4394
Tejun Heo3373efd2006-05-15 20:57:53 +09004395static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004396{
Tejun Heoa0123702005-12-13 14:49:31 +09004397 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004398 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004399
4400 /* set up set-features taskfile */
4401 DPRINTK("set features - xfer mode\n");
4402
Tejun Heo464cf172007-05-27 15:10:40 +02004403 /* Some controllers and ATAPI devices show flaky interrupt
4404 * behavior after setting xfer mode. Use polling instead.
4405 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004406 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004407 tf.command = ATA_CMD_SET_FEATURES;
4408 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004409 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004410 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004411 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004412 if (ata_pio_need_iordy(dev))
4413 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004414 /* If the device has IORDY and the controller does not - turn it off */
4415 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004416 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004417 else /* In the ancient relic department - skip all of this */
4418 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004419
Tejun Heo2b789102007-10-09 15:05:44 +09004420 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004421
Tejun Heo83206a22006-03-24 15:25:31 +09004422 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4423 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004424}
Tejun Heo1152b262010-09-01 17:50:05 +02004425
Linus Torvalds1da177e2005-04-16 15:20:36 -07004426/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004427 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004428 * @dev: Device to which command will be sent
4429 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004430 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004431 *
4432 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004433 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004434 *
4435 * LOCKING:
4436 * PCI/etc. bus probe sem.
4437 *
4438 * RETURNS:
4439 * 0 on success, AC_ERR_* mask otherwise.
4440 */
Tejun Heo1152b262010-09-01 17:50:05 +02004441unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004442{
4443 struct ata_taskfile tf;
4444 unsigned int err_mask;
4445
4446 /* set up set-features taskfile */
4447 DPRINTK("set features - SATA features\n");
4448
4449 ata_tf_init(dev, &tf);
4450 tf.command = ATA_CMD_SET_FEATURES;
4451 tf.feature = enable;
4452 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4453 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004454 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004455
Tejun Heo2b789102007-10-09 15:05:44 +09004456 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004457
4458 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4459 return err_mask;
4460}
4461
4462/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04004463 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04004464 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004465 * @heads: Number of heads (taskfile parameter)
4466 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004467 *
4468 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004469 * Kernel thread context (may sleep)
4470 *
4471 * RETURNS:
4472 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04004473 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004474static unsigned int ata_dev_init_params(struct ata_device *dev,
4475 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004476{
Tejun Heoa0123702005-12-13 14:49:31 +09004477 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004478 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004479
4480 /* Number of sectors per track 1-255. Number of heads 1-16 */
4481 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004482 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004483
4484 /* set up init dev params taskfile */
4485 DPRINTK("init dev params \n");
4486
Tejun Heo3373efd2006-05-15 20:57:53 +09004487 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004488 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4489 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4490 tf.protocol = ATA_PROT_NODATA;
4491 tf.nsect = sectors;
4492 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04004493
Tejun Heo2b789102007-10-09 15:05:44 +09004494 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004495 /* A clean abort indicates an original or just out of spec drive
4496 and we should continue as we issue the setup based on the
4497 drive reported working geometry */
4498 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4499 err_mask = 0;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004500
Tejun Heo6aff8f12006-02-15 18:24:09 +09004501 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4502 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004503}
4504
4505/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004506 * ata_sg_clean - Unmap DMA memory associated with command
4507 * @qc: Command containing DMA memory to be released
4508 *
4509 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004510 *
4511 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004512 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004514void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004515{
4516 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004517 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004518 int dir = qc->dma_dir;
4519
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004520 WARN_ON_ONCE(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004521
James Bottomleydde20202008-02-19 11:36:56 +01004522 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004523
James Bottomleydde20202008-02-19 11:36:56 +01004524 if (qc->n_elem)
FUJITA Tomonori58256272009-02-27 17:35:43 +09004525 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004526
4527 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004528 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004529}
4530
4531/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004532 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004533 * @qc: Metadata associated with taskfile to check
4534 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004535 * Allow low-level driver to filter ATA PACKET commands, returning
4536 * a status indicating whether or not it is OK to use DMA for the
4537 * supplied PACKET command.
4538 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004540 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004541 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004542 * RETURNS: 0 when ATAPI DMA can be used
4543 * nonzero otherwise
4544 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004545int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004546{
4547 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004548
Tejun Heob9a41972007-06-27 02:48:43 +09004549 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4550 * few ATAPI devices choke on such DMA requests.
4551 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004552 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4553 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004554 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004555
Linus Torvalds1da177e2005-04-16 15:20:36 -07004556 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004557 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004558
Tejun Heob9a41972007-06-27 02:48:43 +09004559 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004560}
Tejun Heob9a41972007-06-27 02:48:43 +09004561
Linus Torvalds1da177e2005-04-16 15:20:36 -07004562/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004563 * ata_std_qc_defer - Check whether a qc needs to be deferred
4564 * @qc: ATA command in question
4565 *
4566 * Non-NCQ commands cannot run with any other command, NCQ or
4567 * not. As upper layer only knows the queue depth, we are
4568 * responsible for maintaining exclusion. This function checks
4569 * whether a new command @qc can be issued.
4570 *
4571 * LOCKING:
4572 * spin_lock_irqsave(host lock)
4573 *
4574 * RETURNS:
4575 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4576 */
4577int ata_std_qc_defer(struct ata_queued_cmd *qc)
4578{
4579 struct ata_link *link = qc->dev->link;
4580
4581 if (qc->tf.protocol == ATA_PROT_NCQ) {
4582 if (!ata_tag_valid(link->active_tag))
4583 return 0;
4584 } else {
4585 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4586 return 0;
4587 }
4588
4589 return ATA_DEFER_LINK;
4590}
4591
Brian Kinge46834c2006-03-17 17:04:03 -06004592void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4593
Jeff Garzik0cba6322005-05-30 19:49:12 -04004594/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004595 * ata_sg_init - Associate command with scatter-gather table.
4596 * @qc: Command to be associated
4597 * @sg: Scatter-gather table.
4598 * @n_elem: Number of elements in s/g table.
4599 *
4600 * Initialize the data-related elements of queued_cmd @qc
4601 * to point to a scatter-gather table @sg, containing @n_elem
4602 * elements.
4603 *
4604 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004605 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004606 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004607void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4608 unsigned int n_elem)
4609{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004610 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004611 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004612 qc->cursg = qc->sg;
4613}
4614
Linus Torvalds1da177e2005-04-16 15:20:36 -07004615/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004616 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4617 * @qc: Command with scatter-gather table to be mapped.
4618 *
4619 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004620 *
4621 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004622 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004623 *
4624 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004625 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004626 *
4627 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004628static int ata_sg_setup(struct ata_queued_cmd *qc)
4629{
4630 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004631 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004632
Tejun Heo44877b42007-02-21 01:06:51 +09004633 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004634
James Bottomleydde20202008-02-19 11:36:56 +01004635 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4636 if (n_elem < 1)
4637 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004638
James Bottomleydde20202008-02-19 11:36:56 +01004639 DPRINTK("%d sg elements mapped\n", n_elem);
FUJITA Tomonori58256272009-02-27 17:35:43 +09004640 qc->orig_n_elem = qc->n_elem;
James Bottomleydde20202008-02-19 11:36:56 +01004641 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004642 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004643
4644 return 0;
4645}
4646
4647/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004648 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004649 * @buf: Buffer to swap
4650 * @buf_words: Number of 16-bit words in buffer.
4651 *
4652 * Swap halves of 16-bit words if needed to convert from
4653 * little-endian byte order to native cpu byte order, or
4654 * vice-versa.
4655 *
4656 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004657 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004658 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004659void swap_buf_le16(u16 *buf, unsigned int buf_words)
4660{
4661#ifdef __BIG_ENDIAN
4662 unsigned int i;
4663
4664 for (i = 0; i < buf_words; i++)
4665 buf[i] = le16_to_cpu(buf[i]);
4666#endif /* __BIG_ENDIAN */
4667}
4668
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004669/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004670 * ata_qc_new - Request an available ATA command, for queueing
Randy Dunlap5eb66fe2009-01-20 16:28:59 -08004671 * @ap: target port
Tejun Heo8a8bc222008-11-10 14:48:21 +09004672 *
4673 * LOCKING:
4674 * None.
4675 */
4676
4677static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4678{
4679 struct ata_queued_cmd *qc = NULL;
4680 unsigned int i;
4681
4682 /* no command while frozen */
4683 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4684 return NULL;
4685
4686 /* the last tag is reserved for internal command. */
4687 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4688 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4689 qc = __ata_qc_from_tag(ap, i);
4690 break;
4691 }
4692
4693 if (qc)
4694 qc->tag = i;
4695
4696 return qc;
4697}
4698
4699/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004700 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004701 * @dev: Device from whom we request an available command structure
4702 *
4703 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004704 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004705 */
4706
Tejun Heo8a8bc222008-11-10 14:48:21 +09004707struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004708{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004709 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004710 struct ata_queued_cmd *qc;
4711
Tejun Heo8a8bc222008-11-10 14:48:21 +09004712 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004713 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004714 qc->scsicmd = NULL;
4715 qc->ap = ap;
4716 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004717
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004718 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004719 }
4720
4721 return qc;
4722}
4723
Tejun Heo8a8bc222008-11-10 14:48:21 +09004724/**
4725 * ata_qc_free - free unused ata_queued_cmd
4726 * @qc: Command to complete
4727 *
4728 * Designed to free unused ata_queued_cmd object
4729 * in case something prevents using it.
4730 *
4731 * LOCKING:
4732 * spin_lock_irqsave(host lock)
4733 */
4734void ata_qc_free(struct ata_queued_cmd *qc)
4735{
Julia Lawalla1104012009-10-17 08:41:47 +02004736 struct ata_port *ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004737 unsigned int tag;
4738
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004739 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Julia Lawalla1104012009-10-17 08:41:47 +02004740 ap = qc->ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004741
4742 qc->flags = 0;
4743 tag = qc->tag;
4744 if (likely(ata_tag_valid(tag))) {
4745 qc->tag = ATA_TAG_POISON;
4746 clear_bit(tag, &ap->qc_allocated);
4747 }
4748}
4749
Tejun Heo76014422006-02-11 15:13:49 +09004750void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004751{
Julia Lawalla1104012009-10-17 08:41:47 +02004752 struct ata_port *ap;
4753 struct ata_link *link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004754
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004755 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4756 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
Julia Lawalla1104012009-10-17 08:41:47 +02004757 ap = qc->ap;
4758 link = qc->dev->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004759
4760 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4761 ata_sg_clean(qc);
4762
Tejun Heo7401abf2006-05-15 20:57:32 +09004763 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004764 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004765 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004766 if (!link->sactive)
4767 ap->nr_active_links--;
4768 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004769 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004770 ap->nr_active_links--;
4771 }
4772
4773 /* clear exclusive status */
4774 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4775 ap->excl_link == link))
4776 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004777
Albert Lee3f3791d2005-08-16 14:25:38 +08004778 /* atapi: mark qc as inactive to prevent the interrupt handler
4779 * from completing the command twice later, before the error handler
4780 * is called. (when rc != 0 and atapi request sense is needed)
4781 */
4782 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004783 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004784
Linus Torvalds1da177e2005-04-16 15:20:36 -07004785 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004786 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004787}
4788
Tejun Heo39599a52006-11-14 22:37:35 +09004789static void fill_result_tf(struct ata_queued_cmd *qc)
4790{
4791 struct ata_port *ap = qc->ap;
4792
Tejun Heo39599a52006-11-14 22:37:35 +09004793 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004794 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004795}
4796
Tejun Heo00115e02007-11-27 19:28:58 +09004797static void ata_verify_xfer(struct ata_queued_cmd *qc)
4798{
4799 struct ata_device *dev = qc->dev;
4800
Tejun Heo00115e02007-11-27 19:28:58 +09004801 if (ata_is_nodata(qc->tf.protocol))
4802 return;
4803
4804 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4805 return;
4806
4807 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4808}
4809
Tejun Heof686bcb2006-05-15 20:58:05 +09004810/**
4811 * ata_qc_complete - Complete an active ATA command
4812 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004813 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004814 * Indicate to the mid and upper layers that an ATA command has
4815 * completed, with either an ok or not-ok status.
4816 *
4817 * Refrain from calling this function multiple times when
4818 * successfully completing multiple NCQ commands.
4819 * ata_qc_complete_multiple() should be used instead, which will
4820 * properly update IRQ expect state.
Tejun Heof686bcb2006-05-15 20:58:05 +09004821 *
4822 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004823 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004824 */
4825void ata_qc_complete(struct ata_queued_cmd *qc)
4826{
4827 struct ata_port *ap = qc->ap;
4828
4829 /* XXX: New EH and old EH use different mechanisms to
4830 * synchronize EH with regular execution path.
4831 *
4832 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4833 * Normal execution path is responsible for not accessing a
4834 * failed qc. libata core enforces the rule by returning NULL
4835 * from ata_qc_from_tag() for failed qcs.
4836 *
4837 * Old EH depends on ata_qc_complete() nullifying completion
4838 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4839 * not synchronize with interrupt handler. Only PIO task is
4840 * taken care of.
4841 */
4842 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004843 struct ata_device *dev = qc->dev;
4844 struct ata_eh_info *ehi = &dev->link->eh_info;
4845
Tejun Heof686bcb2006-05-15 20:58:05 +09004846 if (unlikely(qc->err_mask))
4847 qc->flags |= ATA_QCFLAG_FAILED;
4848
Tejun Heof08dc1a2010-12-09 15:59:32 +01004849 /*
4850 * Finish internal commands without any further processing
4851 * and always with the result TF filled.
4852 */
4853 if (unlikely(ata_tag_internal(qc->tag))) {
Tejun Heof4b31db2009-10-16 13:00:51 +09004854 fill_result_tf(qc);
Tejun Heof08dc1a2010-12-09 15:59:32 +01004855 __ata_qc_complete(qc);
4856 return;
4857 }
Tejun Heof4b31db2009-10-16 13:00:51 +09004858
Tejun Heof08dc1a2010-12-09 15:59:32 +01004859 /*
4860 * Non-internal qc has failed. Fill the result TF and
4861 * summon EH.
4862 */
4863 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4864 fill_result_tf(qc);
4865 ata_qc_schedule_eh(qc);
Tejun Heof4b31db2009-10-16 13:00:51 +09004866 return;
Tejun Heof686bcb2006-05-15 20:58:05 +09004867 }
4868
Tejun Heo4dc738e2009-09-17 18:45:27 +09004869 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4870
Tejun Heof686bcb2006-05-15 20:58:05 +09004871 /* read result TF if requested */
4872 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004873 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004874
Tejun Heo4dbfa392007-10-25 18:22:44 +09004875 /* Some commands need post-processing after successful
4876 * completion.
4877 */
4878 switch (qc->tf.command) {
4879 case ATA_CMD_SET_FEATURES:
4880 if (qc->tf.feature != SETFEATURES_WC_ON &&
4881 qc->tf.feature != SETFEATURES_WC_OFF)
4882 break;
4883 /* fall through */
4884 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4885 case ATA_CMD_SET_MULTI: /* multi_count changed */
4886 /* revalidate device */
4887 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4888 ata_port_schedule_eh(ap);
4889 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004890
4891 case ATA_CMD_SLEEP:
4892 dev->flags |= ATA_DFLAG_SLEEPING;
4893 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09004894 }
4895
Tejun Heo00115e02007-11-27 19:28:58 +09004896 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4897 ata_verify_xfer(qc);
4898
Tejun Heof686bcb2006-05-15 20:58:05 +09004899 __ata_qc_complete(qc);
4900 } else {
4901 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4902 return;
4903
4904 /* read result TF if failed or requested */
4905 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004906 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004907
4908 __ata_qc_complete(qc);
4909 }
4910}
4911
Tejun Heodedaf2b2006-05-15 21:03:43 +09004912/**
4913 * ata_qc_complete_multiple - Complete multiple qcs successfully
4914 * @ap: port in question
4915 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09004916 *
4917 * Complete in-flight commands. This functions is meant to be
4918 * called from low-level driver's interrupt routine to complete
4919 * requests normally. ap->qc_active and @qc_active is compared
4920 * and commands are completed accordingly.
4921 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004922 * Always use this function when completing multiple NCQ commands
4923 * from IRQ handlers instead of calling ata_qc_complete()
4924 * multiple times to keep IRQ expect status properly in sync.
4925 *
Tejun Heodedaf2b2006-05-15 21:03:43 +09004926 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004927 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004928 *
4929 * RETURNS:
4930 * Number of completed commands on success, -errno otherwise.
4931 */
Tejun Heo79f97da2008-04-07 22:47:20 +09004932int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004933{
4934 int nr_done = 0;
4935 u32 done_mask;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004936
4937 done_mask = ap->qc_active ^ qc_active;
4938
4939 if (unlikely(done_mask & qc_active)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004940 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
4941 ap->qc_active, qc_active);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004942 return -EINVAL;
4943 }
4944
Jens Axboe43768182009-05-20 09:44:39 +02004945 while (done_mask) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004946 struct ata_queued_cmd *qc;
Jens Axboe43768182009-05-20 09:44:39 +02004947 unsigned int tag = __ffs(done_mask);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004948
Jens Axboe43768182009-05-20 09:44:39 +02004949 qc = ata_qc_from_tag(ap, tag);
4950 if (qc) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004951 ata_qc_complete(qc);
4952 nr_done++;
4953 }
Jens Axboe43768182009-05-20 09:44:39 +02004954 done_mask &= ~(1 << tag);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004955 }
4956
4957 return nr_done;
4958}
4959
Linus Torvalds1da177e2005-04-16 15:20:36 -07004960/**
4961 * ata_qc_issue - issue taskfile to device
4962 * @qc: command to issue to device
4963 *
4964 * Prepare an ATA command to submission to device.
4965 * This includes mapping the data into a DMA-able
4966 * area, filling in the S/G table, and finally
4967 * writing the taskfile to hardware, starting the command.
4968 *
4969 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004970 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004971 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004972void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004973{
4974 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004975 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09004976 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004977
Tejun Heodedaf2b2006-05-15 21:03:43 +09004978 /* Make sure only one non-NCQ command is outstanding. The
4979 * check is skipped for old EH because it reuses active qc to
4980 * request ATAPI sense.
4981 */
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004982 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09004983
Tejun Heo1973a022007-12-05 10:36:13 +09004984 if (ata_is_ncq(prot)) {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004985 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09004986
4987 if (!link->sactive)
4988 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004989 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004990 } else {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004991 WARN_ON_ONCE(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09004992
4993 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004994 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004995 }
4996
Tejun Heoe4a70e72006-03-31 20:36:47 +09004997 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004998 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004999
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005000 /*
5001 * We guarantee to LLDs that they will have at least one
Tejun Heof92a2632007-12-05 16:43:10 +09005002 * non-zero sg if the command is a data command.
5003 */
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005004 if (WARN_ON_ONCE(ata_is_data(prot) &&
5005 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5006 goto sys_err;
Tejun Heof92a2632007-12-05 16:43:10 +09005007
Tejun Heo405e66b2007-11-27 19:28:53 +09005008 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09005009 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09005010 if (ata_sg_setup(qc))
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005011 goto sys_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005012
Tejun Heocf480622008-01-24 00:05:14 +09005013 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09005014 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09005015 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005016 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5017 ata_link_abort(link);
5018 return;
5019 }
5020
Linus Torvalds1da177e2005-04-16 15:20:36 -07005021 ap->ops->qc_prep(qc);
5022
Tejun Heo8e0e6942006-03-31 20:41:11 +09005023 qc->err_mask |= ap->ops->qc_issue(qc);
5024 if (unlikely(qc->err_mask))
5025 goto err;
5026 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005027
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005028sys_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09005029 qc->err_mask |= AC_ERR_SYSTEM;
5030err:
5031 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005032}
5033
5034/**
Tejun Heo34bf2172006-05-15 20:57:46 +09005035 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09005036 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09005037 *
Tejun Heo936fd732007-08-06 18:36:23 +09005038 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09005039 *
5040 * LOCKING:
5041 * None.
5042 *
5043 * RETURNS:
5044 * 1 if SCRs are accessible, 0 otherwise.
5045 */
Tejun Heo936fd732007-08-06 18:36:23 +09005046int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005047{
Tejun Heo936fd732007-08-06 18:36:23 +09005048 struct ata_port *ap = link->ap;
5049
Tejun Heoa16abc02007-05-21 18:33:47 +02005050 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005051}
5052
5053/**
5054 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005055 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005056 * @reg: SCR to read
5057 * @val: Place to store read value
5058 *
Tejun Heo936fd732007-08-06 18:36:23 +09005059 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005060 * guaranteed to succeed if @link is ap->link, the cable type of
5061 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005062 *
5063 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005064 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005065 *
5066 * RETURNS:
5067 * 0 on success, negative errno on failure.
5068 */
Tejun Heo936fd732007-08-06 18:36:23 +09005069int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005070{
Tejun Heo633273a2007-09-23 13:19:54 +09005071 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005072 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005073 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005074 return -EOPNOTSUPP;
5075 }
5076
5077 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005078}
5079
5080/**
5081 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005082 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005083 * @reg: SCR to write
5084 * @val: value to write
5085 *
Tejun Heo936fd732007-08-06 18:36:23 +09005086 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005087 * guaranteed to succeed if @link is ap->link, the cable type of
5088 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005089 *
5090 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005091 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005092 *
5093 * RETURNS:
5094 * 0 on success, negative errno on failure.
5095 */
Tejun Heo936fd732007-08-06 18:36:23 +09005096int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005097{
Tejun Heo633273a2007-09-23 13:19:54 +09005098 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005099 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005100 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005101 return -EOPNOTSUPP;
5102 }
5103
5104 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005105}
5106
5107/**
5108 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005109 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005110 * @reg: SCR to write
5111 * @val: value to write
5112 *
5113 * This function is identical to sata_scr_write() except that this
5114 * function performs flush after writing to the register.
5115 *
5116 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005117 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005118 *
5119 * RETURNS:
5120 * 0 on success, negative errno on failure.
5121 */
Tejun Heo936fd732007-08-06 18:36:23 +09005122int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005123{
Tejun Heo633273a2007-09-23 13:19:54 +09005124 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005125 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005126
Tejun Heo633273a2007-09-23 13:19:54 +09005127 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005128 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005129 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005130 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a2007-09-23 13:19:54 +09005131 return rc;
5132 }
5133 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005134 }
Tejun Heo633273a2007-09-23 13:19:54 +09005135
5136 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005137}
5138
5139/**
Tejun Heob1c72912008-07-31 17:02:43 +09005140 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005141 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005142 *
Tejun Heo936fd732007-08-06 18:36:23 +09005143 * Test whether @link is online. Note that this function returns
5144 * 0 if online status of @link cannot be obtained, so
5145 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005146 *
5147 * LOCKING:
5148 * None.
5149 *
5150 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005151 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005152 */
Tejun Heob1c72912008-07-31 17:02:43 +09005153bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005154{
5155 u32 sstatus;
5156
Tejun Heo936fd732007-08-06 18:36:23 +09005157 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005158 ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005159 return true;
5160 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005161}
5162
5163/**
Tejun Heob1c72912008-07-31 17:02:43 +09005164 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005165 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005166 *
Tejun Heo936fd732007-08-06 18:36:23 +09005167 * Test whether @link is offline. Note that this function
5168 * returns 0 if offline status of @link cannot be obtained, so
5169 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005170 *
5171 * LOCKING:
5172 * None.
5173 *
5174 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005175 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005176 */
Tejun Heob1c72912008-07-31 17:02:43 +09005177bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005178{
5179 u32 sstatus;
5180
Tejun Heo936fd732007-08-06 18:36:23 +09005181 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005182 !ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005183 return true;
5184 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005185}
Edward Falk0baab862005-06-02 18:17:13 -04005186
Tejun Heob1c72912008-07-31 17:02:43 +09005187/**
5188 * ata_link_online - test whether the given link is online
5189 * @link: ATA link to test
5190 *
5191 * Test whether @link is online. This is identical to
5192 * ata_phys_link_online() when there's no slave link. When
5193 * there's a slave link, this function should only be called on
5194 * the master link and will return true if any of M/S links is
5195 * online.
5196 *
5197 * LOCKING:
5198 * None.
5199 *
5200 * RETURNS:
5201 * True if the port online status is available and online.
5202 */
5203bool ata_link_online(struct ata_link *link)
5204{
5205 struct ata_link *slave = link->ap->slave_link;
5206
5207 WARN_ON(link == slave); /* shouldn't be called on slave link */
5208
5209 return ata_phys_link_online(link) ||
5210 (slave && ata_phys_link_online(slave));
5211}
5212
5213/**
5214 * ata_link_offline - test whether the given link is offline
5215 * @link: ATA link to test
5216 *
5217 * Test whether @link is offline. This is identical to
5218 * ata_phys_link_offline() when there's no slave link. When
5219 * there's a slave link, this function should only be called on
5220 * the master link and will return true if both M/S links are
5221 * offline.
5222 *
5223 * LOCKING:
5224 * None.
5225 *
5226 * RETURNS:
5227 * True if the port offline status is available and offline.
5228 */
5229bool ata_link_offline(struct ata_link *link)
5230{
5231 struct ata_link *slave = link->ap->slave_link;
5232
5233 WARN_ON(link == slave); /* shouldn't be called on slave link */
5234
5235 return ata_phys_link_offline(link) &&
5236 (!slave || ata_phys_link_offline(slave));
5237}
5238
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005239#ifdef CONFIG_PM
Lin Ming5ef41082011-12-05 09:20:27 +08005240static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
Jeff Garzikcca39742006-08-24 03:19:22 -04005241 unsigned int action, unsigned int ehi_flags,
5242 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005243{
Lin Ming5ef41082011-12-05 09:20:27 +08005244 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005245 unsigned long flags;
Lin Ming5ef41082011-12-05 09:20:27 +08005246 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005247
Lin Ming5ef41082011-12-05 09:20:27 +08005248 /* Previous resume operation might still be in
5249 * progress. Wait for PM_PENDING to clear.
5250 */
5251 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5252 ata_port_wait_eh(ap);
5253 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
Tejun Heo500530f2006-07-03 16:07:27 +09005254 }
5255
Lin Ming5ef41082011-12-05 09:20:27 +08005256 /* request PM ops to EH */
5257 spin_lock_irqsave(ap->lock, flags);
5258
5259 ap->pm_mesg = mesg;
5260 if (wait) {
5261 rc = 0;
5262 ap->pm_result = &rc;
5263 }
5264
5265 ap->pflags |= ATA_PFLAG_PM_PENDING;
5266 ata_for_each_link(link, ap, HOST_FIRST) {
5267 link->eh_info.action |= action;
5268 link->eh_info.flags |= ehi_flags;
5269 }
5270
5271 ata_port_schedule_eh(ap);
5272
5273 spin_unlock_irqrestore(ap->lock, flags);
5274
5275 /* wait and check result */
5276 if (wait) {
5277 ata_port_wait_eh(ap);
5278 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5279 }
5280
5281 return rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005282}
5283
Lin Ming5ef41082011-12-05 09:20:27 +08005284#define to_ata_port(d) container_of(d, struct ata_port, tdev)
5285
Lin Ming33574d62011-12-22 14:50:49 +08005286static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
Lin Ming5ef41082011-12-05 09:20:27 +08005287{
5288 struct ata_port *ap = to_ata_port(dev);
Lin Ming33574d62011-12-22 14:50:49 +08005289 unsigned int ehi_flags = ATA_EHI_QUIET;
Lin Ming5ef41082011-12-05 09:20:27 +08005290 int rc;
5291
Lin Ming33574d62011-12-22 14:50:49 +08005292 /*
5293 * On some hardware, device fails to respond after spun down
5294 * for suspend. As the device won't be used before being
5295 * resumed, we don't need to touch the device. Ask EH to skip
5296 * the usual stuff and proceed directly to suspend.
5297 *
5298 * http://thread.gmane.org/gmane.linux.ide/46764
5299 */
5300 if (mesg.event == PM_EVENT_SUSPEND)
5301 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5302
5303 rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, 1);
Lin Ming5ef41082011-12-05 09:20:27 +08005304 return rc;
5305}
5306
5307static int ata_port_suspend(struct device *dev)
5308{
5309 if (pm_runtime_suspended(dev))
5310 return 0;
5311
Lin Ming33574d62011-12-22 14:50:49 +08005312 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5313}
5314
5315static int ata_port_do_freeze(struct device *dev)
5316{
5317 if (pm_runtime_suspended(dev))
5318 pm_runtime_resume(dev);
5319
5320 return ata_port_suspend_common(dev, PMSG_FREEZE);
5321}
5322
5323static int ata_port_poweroff(struct device *dev)
5324{
5325 if (pm_runtime_suspended(dev))
5326 return 0;
5327
5328 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
Lin Ming5ef41082011-12-05 09:20:27 +08005329}
5330
Lin Minge90b1e52011-12-22 14:50:48 +08005331static int ata_port_resume_common(struct device *dev)
Lin Ming5ef41082011-12-05 09:20:27 +08005332{
5333 struct ata_port *ap = to_ata_port(dev);
5334 int rc;
5335
5336 rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
5337 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 1);
5338 return rc;
5339}
5340
Lin Minge90b1e52011-12-22 14:50:48 +08005341static int ata_port_resume(struct device *dev)
5342{
5343 int rc;
5344
5345 rc = ata_port_resume_common(dev);
5346 if (!rc) {
5347 pm_runtime_disable(dev);
5348 pm_runtime_set_active(dev);
5349 pm_runtime_enable(dev);
5350 }
5351
5352 return rc;
5353}
5354
Lin Ming9ee4f392011-12-05 09:20:28 +08005355static int ata_port_runtime_idle(struct device *dev)
5356{
5357 return pm_runtime_suspend(dev);
5358}
5359
Lin Ming5ef41082011-12-05 09:20:27 +08005360static const struct dev_pm_ops ata_port_pm_ops = {
5361 .suspend = ata_port_suspend,
5362 .resume = ata_port_resume,
Lin Ming33574d62011-12-22 14:50:49 +08005363 .freeze = ata_port_do_freeze,
5364 .thaw = ata_port_resume,
5365 .poweroff = ata_port_poweroff,
5366 .restore = ata_port_resume,
Lin Ming9ee4f392011-12-05 09:20:28 +08005367
Lin Ming33574d62011-12-22 14:50:49 +08005368 .runtime_suspend = ata_port_suspend,
Lin Minge90b1e52011-12-22 14:50:48 +08005369 .runtime_resume = ata_port_resume_common,
Lin Ming9ee4f392011-12-05 09:20:28 +08005370 .runtime_idle = ata_port_runtime_idle,
Lin Ming5ef41082011-12-05 09:20:27 +08005371};
5372
Tejun Heo500530f2006-07-03 16:07:27 +09005373/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005374 * ata_host_suspend - suspend host
5375 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005376 * @mesg: PM message
5377 *
Lin Ming5ef41082011-12-05 09:20:27 +08005378 * Suspend @host. Actual operation is performed by port suspend.
Tejun Heo500530f2006-07-03 16:07:27 +09005379 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005380int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005381{
Lin Ming5ef41082011-12-05 09:20:27 +08005382 host->dev->power.power_state = mesg;
5383 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09005384}
5385
5386/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005387 * ata_host_resume - resume host
5388 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005389 *
Lin Ming5ef41082011-12-05 09:20:27 +08005390 * Resume @host. Actual operation is performed by port resume.
Tejun Heo500530f2006-07-03 16:07:27 +09005391 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005392void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005393{
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005394 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005395}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005396#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005397
Lin Ming5ef41082011-12-05 09:20:27 +08005398struct device_type ata_port_type = {
5399 .name = "ata_port",
5400#ifdef CONFIG_PM
5401 .pm = &ata_port_pm_ops,
5402#endif
5403};
5404
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005405/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005406 * ata_dev_init - Initialize an ata_device structure
5407 * @dev: Device structure to initialize
5408 *
5409 * Initialize @dev in preparation for probing.
5410 *
5411 * LOCKING:
5412 * Inherited from caller.
5413 */
5414void ata_dev_init(struct ata_device *dev)
5415{
Tejun Heob1c72912008-07-31 17:02:43 +09005416 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005417 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005418 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005419
Tejun Heob1c72912008-07-31 17:02:43 +09005420 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005421 link->sata_spd_limit = link->hw_sata_spd_limit;
5422 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005423
Tejun Heo72fa4b72006-05-31 18:27:32 +09005424 /* High bits of dev->flags are used to record warm plug
5425 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005426 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005427 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005428 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005429 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005430 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005431 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005432
Tejun Heo99cf6102009-01-29 20:31:32 +09005433 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5434 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005435 dev->pio_mask = UINT_MAX;
5436 dev->mwdma_mask = UINT_MAX;
5437 dev->udma_mask = UINT_MAX;
5438}
5439
5440/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005441 * ata_link_init - Initialize an ata_link structure
5442 * @ap: ATA port link is attached to
5443 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005444 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005445 *
5446 * Initialize @link.
5447 *
5448 * LOCKING:
5449 * Kernel thread context (may sleep)
5450 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005451void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005452{
5453 int i;
5454
5455 /* clear everything except for devices */
Gwendal Grignoud9027472010-05-25 12:31:38 -07005456 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5457 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005458
5459 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005460 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005461 link->active_tag = ATA_TAG_POISON;
5462 link->hw_sata_spd_limit = UINT_MAX;
5463
5464 /* can't use iterator, ap isn't initialized yet */
5465 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5466 struct ata_device *dev = &link->device[i];
5467
5468 dev->link = link;
5469 dev->devno = dev - link->device;
Tejun Heo110f66d2009-09-16 04:17:28 +09005470#ifdef CONFIG_ATA_ACPI
5471 dev->gtf_filter = ata_acpi_gtf_filter;
5472#endif
Tejun Heo4fb37a22007-08-06 18:36:23 +09005473 ata_dev_init(dev);
5474 }
5475}
5476
5477/**
5478 * sata_link_init_spd - Initialize link->sata_spd_limit
5479 * @link: Link to configure sata_spd_limit for
5480 *
5481 * Initialize @link->[hw_]sata_spd_limit to the currently
5482 * configured value.
5483 *
5484 * LOCKING:
5485 * Kernel thread context (may sleep).
5486 *
5487 * RETURNS:
5488 * 0 on success, -errno on failure.
5489 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005490int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005491{
Tejun Heo33267322008-02-13 09:15:09 +09005492 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005493 int rc;
5494
Tejun Heod127ea72008-07-31 16:09:34 +09005495 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005496 if (rc)
5497 return rc;
5498
Tejun Heod127ea72008-07-31 16:09:34 +09005499 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005500 if (spd)
5501 link->hw_sata_spd_limit &= (1 << spd) - 1;
5502
Tejun Heo05944bd2008-08-13 20:19:09 +09005503 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005504
Tejun Heo4fb37a22007-08-06 18:36:23 +09005505 link->sata_spd_limit = link->hw_sata_spd_limit;
5506
5507 return 0;
5508}
5509
5510/**
Tejun Heof3187192007-04-17 23:44:07 +09005511 * ata_port_alloc - allocate and initialize basic ATA port resources
5512 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005513 *
Tejun Heof3187192007-04-17 23:44:07 +09005514 * Allocate and initialize basic ATA port resources.
5515 *
5516 * RETURNS:
5517 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005518 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005519 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005520 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005521 */
Tejun Heof3187192007-04-17 23:44:07 +09005522struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005523{
Tejun Heof3187192007-04-17 23:44:07 +09005524 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005525
Tejun Heof3187192007-04-17 23:44:07 +09005526 DPRINTK("ENTER\n");
5527
5528 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5529 if (!ap)
5530 return NULL;
Jeff Garzik4fca3772011-02-15 01:13:24 -05005531
Maxime Bizon7b3a24c2011-03-16 14:58:32 +01005532 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
Jeff Garzikcca39742006-08-24 03:19:22 -04005533 ap->lock = &host->lock;
Tejun Heof3187192007-04-17 23:44:07 +09005534 ap->print_id = -1;
Jeff Garzikcca39742006-08-24 03:19:22 -04005535 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005536 ap->dev = host->dev;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005537
5538#if defined(ATA_VERBOSE_DEBUG)
5539 /* turn on all debugging levels */
5540 ap->msg_enable = 0x00FF;
5541#elif defined(ATA_DEBUG)
5542 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
Tejun Heo88574552006-06-25 20:00:35 +09005543#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005544 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005545#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005546
Tejun Heoad72cf92010-07-02 10:03:52 +02005547 mutex_init(&ap->scsi_scan_mutex);
David Howells65f27f32006-11-22 14:55:48 +00005548 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5549 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005550 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005551 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005552 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005553 init_timer_deferrable(&ap->fastdrain_timer);
5554 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5555 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005556
Tejun Heo838df622006-05-15 20:57:44 +09005557 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005558
Tejun Heo89898052007-08-06 18:36:23 +09005559 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005560
5561#ifdef ATA_IRQ_TRAP
5562 ap->stats.unhandled_irq = 1;
5563 ap->stats.idle_irq = 1;
5564#endif
Tejun Heo270390e2010-05-10 21:41:35 +02005565 ata_sff_port_init(ap);
5566
Linus Torvalds1da177e2005-04-16 15:20:36 -07005567 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005568}
5569
Tejun Heof0d36ef2007-01-20 16:00:28 +09005570static void ata_host_release(struct device *gendev, void *res)
5571{
5572 struct ata_host *host = dev_get_drvdata(gendev);
5573 int i;
5574
5575 for (i = 0; i < host->n_ports; i++) {
5576 struct ata_port *ap = host->ports[i];
5577
Tejun Heoecef7252007-04-17 23:44:06 +09005578 if (!ap)
5579 continue;
5580
Tejun Heo49114872007-04-17 23:44:06 +09005581 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005582 scsi_host_put(ap->scsi_host);
5583
Tejun Heo633273a2007-09-23 13:19:54 +09005584 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005585 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005586 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005587 host->ports[i] = NULL;
5588 }
5589
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005590 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005591}
5592
Linus Torvalds1da177e2005-04-16 15:20:36 -07005593/**
Tejun Heof3187192007-04-17 23:44:07 +09005594 * ata_host_alloc - allocate and init basic ATA host resources
5595 * @dev: generic device this host is associated with
5596 * @max_ports: maximum number of ATA ports associated with this host
5597 *
5598 * Allocate and initialize basic ATA host resources. LLD calls
5599 * this function to allocate a host, initializes it fully and
5600 * attaches it using ata_host_register().
5601 *
5602 * @max_ports ports are allocated and host->n_ports is
5603 * initialized to @max_ports. The caller is allowed to decrease
5604 * host->n_ports before calling ata_host_register(). The unused
5605 * ports will be automatically freed on registration.
5606 *
5607 * RETURNS:
5608 * Allocate ATA host on success, NULL on failure.
5609 *
5610 * LOCKING:
5611 * Inherited from calling layer (may sleep).
5612 */
5613struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5614{
5615 struct ata_host *host;
5616 size_t sz;
5617 int i;
5618
5619 DPRINTK("ENTER\n");
5620
5621 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5622 return NULL;
5623
5624 /* alloc a container for our list of ATA ports (buses) */
5625 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5626 /* alloc a container for our list of ATA ports (buses) */
5627 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5628 if (!host)
5629 goto err_out;
5630
5631 devres_add(dev, host);
5632 dev_set_drvdata(dev, host);
5633
5634 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02005635 mutex_init(&host->eh_mutex);
Tejun Heof3187192007-04-17 23:44:07 +09005636 host->dev = dev;
5637 host->n_ports = max_ports;
5638
5639 /* allocate ports bound to this host */
5640 for (i = 0; i < max_ports; i++) {
5641 struct ata_port *ap;
5642
5643 ap = ata_port_alloc(host);
5644 if (!ap)
5645 goto err_out;
5646
5647 ap->port_no = i;
5648 host->ports[i] = ap;
5649 }
5650
5651 devres_remove_group(dev, NULL);
5652 return host;
5653
5654 err_out:
5655 devres_release_group(dev, NULL);
5656 return NULL;
5657}
5658
5659/**
Tejun Heof5cda252007-04-17 23:44:07 +09005660 * ata_host_alloc_pinfo - alloc host and init with port_info array
5661 * @dev: generic device this host is associated with
5662 * @ppi: array of ATA port_info to initialize host with
5663 * @n_ports: number of ATA ports attached to this host
5664 *
5665 * Allocate ATA host and initialize with info from @ppi. If NULL
5666 * terminated, @ppi may contain fewer entries than @n_ports. The
5667 * last entry will be used for the remaining ports.
5668 *
5669 * RETURNS:
5670 * Allocate ATA host on success, NULL on failure.
5671 *
5672 * LOCKING:
5673 * Inherited from calling layer (may sleep).
5674 */
5675struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5676 const struct ata_port_info * const * ppi,
5677 int n_ports)
5678{
5679 const struct ata_port_info *pi;
5680 struct ata_host *host;
5681 int i, j;
5682
5683 host = ata_host_alloc(dev, n_ports);
5684 if (!host)
5685 return NULL;
5686
5687 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5688 struct ata_port *ap = host->ports[i];
5689
5690 if (ppi[j])
5691 pi = ppi[j++];
5692
5693 ap->pio_mask = pi->pio_mask;
5694 ap->mwdma_mask = pi->mwdma_mask;
5695 ap->udma_mask = pi->udma_mask;
5696 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005697 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005698 ap->ops = pi->port_ops;
5699
5700 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5701 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005702 }
5703
5704 return host;
5705}
5706
Tejun Heob1c72912008-07-31 17:02:43 +09005707/**
5708 * ata_slave_link_init - initialize slave link
5709 * @ap: port to initialize slave link for
5710 *
5711 * Create and initialize slave link for @ap. This enables slave
5712 * link handling on the port.
5713 *
5714 * In libata, a port contains links and a link contains devices.
5715 * There is single host link but if a PMP is attached to it,
5716 * there can be multiple fan-out links. On SATA, there's usually
5717 * a single device connected to a link but PATA and SATA
5718 * controllers emulating TF based interface can have two - master
5719 * and slave.
5720 *
5721 * However, there are a few controllers which don't fit into this
5722 * abstraction too well - SATA controllers which emulate TF
5723 * interface with both master and slave devices but also have
5724 * separate SCR register sets for each device. These controllers
5725 * need separate links for physical link handling
5726 * (e.g. onlineness, link speed) but should be treated like a
5727 * traditional M/S controller for everything else (e.g. command
5728 * issue, softreset).
5729 *
5730 * slave_link is libata's way of handling this class of
5731 * controllers without impacting core layer too much. For
5732 * anything other than physical link handling, the default host
5733 * link is used for both master and slave. For physical link
5734 * handling, separate @ap->slave_link is used. All dirty details
5735 * are implemented inside libata core layer. From LLD's POV, the
5736 * only difference is that prereset, hardreset and postreset are
5737 * called once more for the slave link, so the reset sequence
5738 * looks like the following.
5739 *
5740 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5741 * softreset(M) -> postreset(M) -> postreset(S)
5742 *
5743 * Note that softreset is called only for the master. Softreset
5744 * resets both M/S by definition, so SRST on master should handle
5745 * both (the standard method will work just fine).
5746 *
5747 * LOCKING:
5748 * Should be called before host is registered.
5749 *
5750 * RETURNS:
5751 * 0 on success, -errno on failure.
5752 */
5753int ata_slave_link_init(struct ata_port *ap)
5754{
5755 struct ata_link *link;
5756
5757 WARN_ON(ap->slave_link);
5758 WARN_ON(ap->flags & ATA_FLAG_PMP);
5759
5760 link = kzalloc(sizeof(*link), GFP_KERNEL);
5761 if (!link)
5762 return -ENOMEM;
5763
5764 ata_link_init(ap, link, 1);
5765 ap->slave_link = link;
5766 return 0;
5767}
5768
Tejun Heo32ebbc02007-11-08 13:09:00 +09005769static void ata_host_stop(struct device *gendev, void *res)
5770{
5771 struct ata_host *host = dev_get_drvdata(gendev);
5772 int i;
5773
5774 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5775
5776 for (i = 0; i < host->n_ports; i++) {
5777 struct ata_port *ap = host->ports[i];
5778
5779 if (ap->ops->port_stop)
5780 ap->ops->port_stop(ap);
5781 }
5782
5783 if (host->ops->host_stop)
5784 host->ops->host_stop(host);
5785}
5786
Tejun Heof5cda252007-04-17 23:44:07 +09005787/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005788 * ata_finalize_port_ops - finalize ata_port_operations
5789 * @ops: ata_port_operations to finalize
5790 *
5791 * An ata_port_operations can inherit from another ops and that
5792 * ops can again inherit from another. This can go on as many
5793 * times as necessary as long as there is no loop in the
5794 * inheritance chain.
5795 *
5796 * Ops tables are finalized when the host is started. NULL or
5797 * unspecified entries are inherited from the closet ancestor
5798 * which has the method and the entry is populated with it.
5799 * After finalization, the ops table directly points to all the
5800 * methods and ->inherits is no longer necessary and cleared.
5801 *
5802 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5803 *
5804 * LOCKING:
5805 * None.
5806 */
5807static void ata_finalize_port_ops(struct ata_port_operations *ops)
5808{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305809 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005810 const struct ata_port_operations *cur;
5811 void **begin = (void **)ops;
5812 void **end = (void **)&ops->inherits;
5813 void **pp;
5814
5815 if (!ops || !ops->inherits)
5816 return;
5817
5818 spin_lock(&lock);
5819
5820 for (cur = ops->inherits; cur; cur = cur->inherits) {
5821 void **inherit = (void **)cur;
5822
5823 for (pp = begin; pp < end; pp++, inherit++)
5824 if (!*pp)
5825 *pp = *inherit;
5826 }
5827
5828 for (pp = begin; pp < end; pp++)
5829 if (IS_ERR(*pp))
5830 *pp = NULL;
5831
5832 ops->inherits = NULL;
5833
5834 spin_unlock(&lock);
5835}
5836
5837/**
Tejun Heoecef7252007-04-17 23:44:06 +09005838 * ata_host_start - start and freeze ports of an ATA host
5839 * @host: ATA host to start ports for
5840 *
5841 * Start and then freeze ports of @host. Started status is
5842 * recorded in host->flags, so this function can be called
5843 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005844 * once. If host->ops isn't initialized yet, its set to the
5845 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005846 *
5847 * LOCKING:
5848 * Inherited from calling layer (may sleep).
5849 *
5850 * RETURNS:
5851 * 0 if all ports are started successfully, -errno otherwise.
5852 */
5853int ata_host_start(struct ata_host *host)
5854{
Tejun Heo32ebbc02007-11-08 13:09:00 +09005855 int have_stop = 0;
5856 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09005857 int i, rc;
5858
5859 if (host->flags & ATA_HOST_STARTED)
5860 return 0;
5861
Tejun Heo029cfd62008-03-25 12:22:49 +09005862 ata_finalize_port_ops(host->ops);
5863
Tejun Heoecef7252007-04-17 23:44:06 +09005864 for (i = 0; i < host->n_ports; i++) {
5865 struct ata_port *ap = host->ports[i];
5866
Tejun Heo029cfd62008-03-25 12:22:49 +09005867 ata_finalize_port_ops(ap->ops);
5868
Tejun Heof3187192007-04-17 23:44:07 +09005869 if (!host->ops && !ata_port_is_dummy(ap))
5870 host->ops = ap->ops;
5871
Tejun Heo32ebbc02007-11-08 13:09:00 +09005872 if (ap->ops->port_stop)
5873 have_stop = 1;
5874 }
5875
5876 if (host->ops->host_stop)
5877 have_stop = 1;
5878
5879 if (have_stop) {
5880 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5881 if (!start_dr)
5882 return -ENOMEM;
5883 }
5884
5885 for (i = 0; i < host->n_ports; i++) {
5886 struct ata_port *ap = host->ports[i];
5887
Tejun Heoecef7252007-04-17 23:44:06 +09005888 if (ap->ops->port_start) {
5889 rc = ap->ops->port_start(ap);
5890 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00005891 if (rc != -ENODEV)
Joe Perchesa44fec12011-04-15 15:51:58 -07005892 dev_err(host->dev,
5893 "failed to start port %d (errno=%d)\n",
5894 i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09005895 goto err_out;
5896 }
5897 }
Tejun Heoecef7252007-04-17 23:44:06 +09005898 ata_eh_freeze_port(ap);
5899 }
5900
Tejun Heo32ebbc02007-11-08 13:09:00 +09005901 if (start_dr)
5902 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005903 host->flags |= ATA_HOST_STARTED;
5904 return 0;
5905
5906 err_out:
5907 while (--i >= 0) {
5908 struct ata_port *ap = host->ports[i];
5909
5910 if (ap->ops->port_stop)
5911 ap->ops->port_stop(ap);
5912 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09005913 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005914 return rc;
5915}
5916
5917/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005918 * ata_sas_host_init - Initialize a host struct
5919 * @host: host to initialize
5920 * @dev: device host is attached to
5921 * @flags: host flags
5922 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005923 *
5924 * LOCKING:
5925 * PCI/etc. bus probe sem.
5926 *
5927 */
Tejun Heof3187192007-04-17 23:44:07 +09005928/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04005929void ata_host_init(struct ata_host *host, struct device *dev,
Tejun Heo029cfd62008-03-25 12:22:49 +09005930 unsigned long flags, struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005931{
Jeff Garzikcca39742006-08-24 03:19:22 -04005932 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02005933 mutex_init(&host->eh_mutex);
Jeff Garzikcca39742006-08-24 03:19:22 -04005934 host->dev = dev;
5935 host->flags = flags;
5936 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005937}
5938
Dan Williams9508a662012-01-18 20:47:01 -08005939void __ata_port_probe(struct ata_port *ap)
5940{
5941 struct ata_eh_info *ehi = &ap->link.eh_info;
5942 unsigned long flags;
5943
5944 /* kick EH for boot probing */
5945 spin_lock_irqsave(ap->lock, flags);
5946
5947 ehi->probe_mask |= ATA_ALL_DEVICES;
5948 ehi->action |= ATA_EH_RESET;
5949 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5950
5951 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5952 ap->pflags |= ATA_PFLAG_LOADING;
5953 ata_port_schedule_eh(ap);
5954
5955 spin_unlock_irqrestore(ap->lock, flags);
5956}
5957
James Bottomley238c9cf2011-01-23 08:28:33 -06005958int ata_port_probe(struct ata_port *ap)
Arjan van de Ven79318052009-01-04 05:32:28 -08005959{
James Bottomley238c9cf2011-01-23 08:28:33 -06005960 int rc = 0;
Arjan van de Ven886ad092009-01-09 15:54:07 -08005961
Arjan van de Ven79318052009-01-04 05:32:28 -08005962 if (ap->ops->error_handler) {
Dan Williams9508a662012-01-18 20:47:01 -08005963 __ata_port_probe(ap);
Arjan van de Ven79318052009-01-04 05:32:28 -08005964 ata_port_wait_eh(ap);
5965 } else {
5966 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5967 rc = ata_bus_probe(ap);
5968 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Arjan van de Ven79318052009-01-04 05:32:28 -08005969 }
James Bottomley238c9cf2011-01-23 08:28:33 -06005970 return rc;
5971}
5972
5973
5974static void async_port_probe(void *data, async_cookie_t cookie)
5975{
5976 struct ata_port *ap = data;
Jeff Garzik4fca3772011-02-15 01:13:24 -05005977
James Bottomley238c9cf2011-01-23 08:28:33 -06005978 /*
5979 * If we're not allowed to scan this host in parallel,
5980 * we need to wait until all previous scans have completed
5981 * before going further.
5982 * Jeff Garzik says this is only within a controller, so we
5983 * don't need to wait for port 0, only for later ports.
5984 */
5985 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5986 async_synchronize_cookie(cookie);
5987
5988 (void)ata_port_probe(ap);
Arjan van de Venf29d3b22009-01-05 15:07:07 -08005989
5990 /* in order to keep device order, we need to synchronize at this point */
5991 async_synchronize_cookie(cookie);
5992
5993 ata_scsi_scan_host(ap, 1);
Arjan van de Ven79318052009-01-04 05:32:28 -08005994}
James Bottomley238c9cf2011-01-23 08:28:33 -06005995
Brian Kingb03732f2006-08-07 14:27:10 -05005996/**
Tejun Heof3187192007-04-17 23:44:07 +09005997 * ata_host_register - register initialized ATA host
5998 * @host: ATA host to register
5999 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04006000 *
Tejun Heof3187192007-04-17 23:44:07 +09006001 * Register initialized ATA host. @host is allocated using
6002 * ata_host_alloc() and fully initialized by LLD. This function
6003 * starts ports, registers @host with ATA and SCSI layers and
6004 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006005 *
6006 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006007 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006008 *
6009 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09006010 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006011 */
Tejun Heof3187192007-04-17 23:44:07 +09006012int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006013{
Tejun Heof3187192007-04-17 23:44:07 +09006014 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006015
Tejun Heof3187192007-04-17 23:44:07 +09006016 /* host must have been started */
6017 if (!(host->flags & ATA_HOST_STARTED)) {
Joe Perchesa44fec12011-04-15 15:51:58 -07006018 dev_err(host->dev, "BUG: trying to register unstarted host\n");
Tejun Heof3187192007-04-17 23:44:07 +09006019 WARN_ON(1);
6020 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01006021 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09006022
Tejun Heof3187192007-04-17 23:44:07 +09006023 /* Blow away unused ports. This happens when LLD can't
6024 * determine the exact number of ports to allocate at
6025 * allocation time.
6026 */
6027 for (i = host->n_ports; host->ports[i]; i++)
6028 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006029
Tejun Heof3187192007-04-17 23:44:07 +09006030 /* give ports names and add SCSI hosts */
6031 for (i = 0; i < host->n_ports; i++)
Dan Williams85d67252012-03-10 23:28:46 -08006032 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006033
Jeff Garzik4fca3772011-02-15 01:13:24 -05006034
Gwendal Grignoud9027472010-05-25 12:31:38 -07006035 /* Create associated sysfs transport objects */
6036 for (i = 0; i < host->n_ports; i++) {
6037 rc = ata_tport_add(host->dev,host->ports[i]);
6038 if (rc) {
6039 goto err_tadd;
6040 }
6041 }
6042
Tejun Heof3187192007-04-17 23:44:07 +09006043 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09006044 if (rc)
Gwendal Grignoud9027472010-05-25 12:31:38 -07006045 goto err_tadd;
Tejun Heoecef7252007-04-17 23:44:06 +09006046
Tejun Heofafbae82007-05-15 03:28:16 +09006047 /* associate with ACPI nodes */
6048 ata_acpi_associate(host);
6049
Tejun Heof3187192007-04-17 23:44:07 +09006050 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04006051 for (i = 0; i < host->n_ports; i++) {
6052 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09006053 unsigned long xfer_mask;
6054
6055 /* set SATA cable type if still unset */
6056 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6057 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006058
Tejun Heo5a04bf42006-05-31 18:27:38 +09006059 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09006060 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09006061 if (ap->slave_link)
6062 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09006063
Tejun Heocbcdd872007-08-18 13:14:55 +09006064 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09006065 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6066 ap->udma_mask);
6067
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006068 if (!ata_port_is_dummy(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07006069 ata_port_info(ap, "%cATA max %s %s\n",
6070 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6071 ata_mode_string(xfer_mask),
6072 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006073 ata_ehi_clear_desc(&ap->link.eh_info);
6074 } else
Joe Perchesa9a79df2011-04-15 15:51:59 -07006075 ata_port_info(ap, "DUMMY\n");
Tejun Heof3187192007-04-17 23:44:07 +09006076 }
6077
Vegard Nossumf6005352009-04-08 18:19:39 +02006078 /* perform each probe asynchronously */
Tejun Heof3187192007-04-17 23:44:07 +09006079 for (i = 0; i < host->n_ports; i++) {
6080 struct ata_port *ap = host->ports[i];
Arjan van de Ven79318052009-01-04 05:32:28 -08006081 async_schedule(async_port_probe, ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006082 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006083
Tejun Heof3187192007-04-17 23:44:07 +09006084 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006085
6086 err_tadd:
6087 while (--i >= 0) {
6088 ata_tport_delete(host->ports[i]);
6089 }
6090 return rc;
6091
Tejun Heof3187192007-04-17 23:44:07 +09006092}
6093
6094/**
Tejun Heof5cda252007-04-17 23:44:07 +09006095 * ata_host_activate - start host, request IRQ and register it
6096 * @host: target ATA host
6097 * @irq: IRQ to request
6098 * @irq_handler: irq_handler used when requesting IRQ
6099 * @irq_flags: irq_flags used when requesting IRQ
6100 * @sht: scsi_host_template to use when registering the host
6101 *
6102 * After allocating an ATA host and initializing it, most libata
6103 * LLDs perform three steps to activate the host - start host,
6104 * request IRQ and register it. This helper takes necessasry
6105 * arguments and performs the three steps in one go.
6106 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006107 * An invalid IRQ skips the IRQ registration and expects the host to
6108 * have set polling mode on the port. In this case, @irq_handler
6109 * should be NULL.
6110 *
Tejun Heof5cda252007-04-17 23:44:07 +09006111 * LOCKING:
6112 * Inherited from calling layer (may sleep).
6113 *
6114 * RETURNS:
6115 * 0 on success, -errno otherwise.
6116 */
6117int ata_host_activate(struct ata_host *host, int irq,
6118 irq_handler_t irq_handler, unsigned long irq_flags,
6119 struct scsi_host_template *sht)
6120{
Tejun Heocbcdd872007-08-18 13:14:55 +09006121 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006122
6123 rc = ata_host_start(host);
6124 if (rc)
6125 return rc;
6126
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006127 /* Special case for polling mode */
6128 if (!irq) {
6129 WARN_ON(irq_handler);
6130 return ata_host_register(host, sht);
6131 }
6132
Tejun Heof5cda252007-04-17 23:44:07 +09006133 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6134 dev_driver_string(host->dev), host);
6135 if (rc)
6136 return rc;
6137
Tejun Heocbcdd872007-08-18 13:14:55 +09006138 for (i = 0; i < host->n_ports; i++)
6139 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006140
Tejun Heof5cda252007-04-17 23:44:07 +09006141 rc = ata_host_register(host, sht);
6142 /* if failed, just free the IRQ and leave ports alone */
6143 if (rc)
6144 devm_free_irq(host->dev, irq, host);
6145
6146 return rc;
6147}
6148
6149/**
Tejun Heo720ba122006-05-31 18:28:13 +09006150 * ata_port_detach - Detach ATA port in prepration of device removal
6151 * @ap: ATA port to be detached
6152 *
6153 * Detach all ATA devices and the associated SCSI devices of @ap;
6154 * then, remove the associated SCSI host. @ap is guaranteed to
6155 * be quiescent on return from this function.
6156 *
6157 * LOCKING:
6158 * Kernel thread context (may sleep).
6159 */
Adrian Bunk741b7762007-10-24 18:23:06 +02006160static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09006161{
6162 unsigned long flags;
Tejun Heo720ba122006-05-31 18:28:13 +09006163
6164 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006165 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006166
6167 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006168 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006169 ap->pflags |= ATA_PFLAG_UNLOADING;
Tejun Heoece180d2008-11-03 20:04:37 +09006170 ata_port_schedule_eh(ap);
Jeff Garzikba6a1302006-06-22 23:46:10 -04006171 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006172
Tejun Heoece180d2008-11-03 20:04:37 +09006173 /* wait till EH commits suicide */
Tejun Heo720ba122006-05-31 18:28:13 +09006174 ata_port_wait_eh(ap);
6175
Tejun Heoece180d2008-11-03 20:04:37 +09006176 /* it better be dead now */
6177 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
Tejun Heo720ba122006-05-31 18:28:13 +09006178
Tejun Heoafe2c512010-12-14 16:21:17 +01006179 cancel_delayed_work_sync(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006180
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006181 skip_eh:
Gwendal Grignoud9027472010-05-25 12:31:38 -07006182 if (ap->pmp_link) {
6183 int i;
6184 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6185 ata_tlink_delete(&ap->pmp_link[i]);
6186 }
6187 ata_tport_delete(ap);
6188
Tejun Heo720ba122006-05-31 18:28:13 +09006189 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006190 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006191}
6192
6193/**
Tejun Heo0529c152007-01-20 16:00:26 +09006194 * ata_host_detach - Detach all ports of an ATA host
6195 * @host: Host to detach
6196 *
6197 * Detach all ports of @host.
6198 *
6199 * LOCKING:
6200 * Kernel thread context (may sleep).
6201 */
6202void ata_host_detach(struct ata_host *host)
6203{
6204 int i;
6205
6206 for (i = 0; i < host->n_ports; i++)
6207 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006208
6209 /* the host is dead now, dissociate ACPI */
6210 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09006211}
6212
Jeff Garzik374b1872005-08-30 05:42:52 -04006213#ifdef CONFIG_PCI
6214
Edward Falk0baab862005-06-02 18:17:13 -04006215/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006216 * ata_pci_remove_one - PCI layer callback for device removal
6217 * @pdev: PCI device that was removed
6218 *
Tejun Heob878ca52007-01-20 16:00:28 +09006219 * PCI layer indicates to libata via this hook that hot-unplug or
6220 * module unload event has occurred. Detach all ports. Resource
6221 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006222 *
6223 * LOCKING:
6224 * Inherited from PCI layer (may sleep).
6225 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006226void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006227{
Jeff Garzik28555682007-10-11 17:12:35 -04006228 struct device *dev = &pdev->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006229 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006230
Tejun Heob878ca52007-01-20 16:00:28 +09006231 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006232}
6233
6234/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006235int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006236{
6237 unsigned long tmp = 0;
6238
6239 switch (bits->width) {
6240 case 1: {
6241 u8 tmp8 = 0;
6242 pci_read_config_byte(pdev, bits->reg, &tmp8);
6243 tmp = tmp8;
6244 break;
6245 }
6246 case 2: {
6247 u16 tmp16 = 0;
6248 pci_read_config_word(pdev, bits->reg, &tmp16);
6249 tmp = tmp16;
6250 break;
6251 }
6252 case 4: {
6253 u32 tmp32 = 0;
6254 pci_read_config_dword(pdev, bits->reg, &tmp32);
6255 tmp = tmp32;
6256 break;
6257 }
6258
6259 default:
6260 return -EINVAL;
6261 }
6262
6263 tmp &= bits->mask;
6264
6265 return (tmp == bits->val) ? 1 : 0;
6266}
Jens Axboe9b847542006-01-06 09:28:07 +01006267
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006268#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006269void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006270{
6271 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006272 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006273
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006274 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006275 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006276}
6277
Tejun Heo553c4aa2006-12-26 19:39:50 +09006278int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006279{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006280 int rc;
6281
Jens Axboe9b847542006-01-06 09:28:07 +01006282 pci_set_power_state(pdev, PCI_D0);
6283 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006284
Tejun Heob878ca52007-01-20 16:00:28 +09006285 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006286 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -07006287 dev_err(&pdev->dev,
6288 "failed to enable device after resume (%d)\n", rc);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006289 return rc;
6290 }
6291
Jens Axboe9b847542006-01-06 09:28:07 +01006292 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006293 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006294}
6295
Tejun Heo3c5100c2006-07-26 16:58:33 +09006296int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006297{
Jeff Garzikcca39742006-08-24 03:19:22 -04006298 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006299 int rc = 0;
6300
Jeff Garzikcca39742006-08-24 03:19:22 -04006301 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006302 if (rc)
6303 return rc;
6304
Tejun Heo3c5100c2006-07-26 16:58:33 +09006305 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006306
6307 return 0;
6308}
6309
6310int ata_pci_device_resume(struct pci_dev *pdev)
6311{
Jeff Garzikcca39742006-08-24 03:19:22 -04006312 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006313 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006314
Tejun Heo553c4aa2006-12-26 19:39:50 +09006315 rc = ata_pci_device_do_resume(pdev);
6316 if (rc == 0)
6317 ata_host_resume(host);
6318 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006319}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006320#endif /* CONFIG_PM */
6321
Linus Torvalds1da177e2005-04-16 15:20:36 -07006322#endif /* CONFIG_PCI */
6323
Tejun Heo33267322008-02-13 09:15:09 +09006324static int __init ata_parse_force_one(char **cur,
6325 struct ata_force_ent *force_ent,
6326 const char **reason)
6327{
6328 /* FIXME: Currently, there's no way to tag init const data and
6329 * using __initdata causes build failure on some versions of
6330 * gcc. Once __initdataconst is implemented, add const to the
6331 * following structure.
6332 */
6333 static struct ata_force_param force_tbl[] __initdata = {
6334 { "40c", .cbl = ATA_CBL_PATA40 },
6335 { "80c", .cbl = ATA_CBL_PATA80 },
6336 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6337 { "unk", .cbl = ATA_CBL_PATA_UNK },
6338 { "ign", .cbl = ATA_CBL_PATA_IGN },
6339 { "sata", .cbl = ATA_CBL_SATA },
6340 { "1.5Gbps", .spd_limit = 1 },
6341 { "3.0Gbps", .spd_limit = 2 },
6342 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6343 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
Tejun Heo43c9c592010-05-23 12:59:11 +02006344 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
Tejun Heo33267322008-02-13 09:15:09 +09006345 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6346 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6347 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6348 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6349 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6350 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6351 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6352 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6353 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6354 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6355 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6356 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6357 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6358 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6359 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6360 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6361 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6362 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6363 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6364 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6365 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6366 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6367 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6368 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6369 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6370 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6371 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6372 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6373 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6374 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6375 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6376 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6377 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6378 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006379 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6380 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6381 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Tejun Heo33267322008-02-13 09:15:09 +09006382 };
6383 char *start = *cur, *p = *cur;
6384 char *id, *val, *endp;
6385 const struct ata_force_param *match_fp = NULL;
6386 int nr_matches = 0, i;
6387
6388 /* find where this param ends and update *cur */
6389 while (*p != '\0' && *p != ',')
6390 p++;
6391
6392 if (*p == '\0')
6393 *cur = p;
6394 else
6395 *cur = p + 1;
6396
6397 *p = '\0';
6398
6399 /* parse */
6400 p = strchr(start, ':');
6401 if (!p) {
6402 val = strstrip(start);
6403 goto parse_val;
6404 }
6405 *p = '\0';
6406
6407 id = strstrip(start);
6408 val = strstrip(p + 1);
6409
6410 /* parse id */
6411 p = strchr(id, '.');
6412 if (p) {
6413 *p++ = '\0';
6414 force_ent->device = simple_strtoul(p, &endp, 10);
6415 if (p == endp || *endp != '\0') {
6416 *reason = "invalid device";
6417 return -EINVAL;
6418 }
6419 }
6420
6421 force_ent->port = simple_strtoul(id, &endp, 10);
6422 if (p == endp || *endp != '\0') {
6423 *reason = "invalid port/link";
6424 return -EINVAL;
6425 }
6426
6427 parse_val:
6428 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6429 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6430 const struct ata_force_param *fp = &force_tbl[i];
6431
6432 if (strncasecmp(val, fp->name, strlen(val)))
6433 continue;
6434
6435 nr_matches++;
6436 match_fp = fp;
6437
6438 if (strcasecmp(val, fp->name) == 0) {
6439 nr_matches = 1;
6440 break;
6441 }
6442 }
6443
6444 if (!nr_matches) {
6445 *reason = "unknown value";
6446 return -EINVAL;
6447 }
6448 if (nr_matches > 1) {
6449 *reason = "ambigious value";
6450 return -EINVAL;
6451 }
6452
6453 force_ent->param = *match_fp;
6454
6455 return 0;
6456}
6457
6458static void __init ata_parse_force_param(void)
6459{
6460 int idx = 0, size = 1;
6461 int last_port = -1, last_device = -1;
6462 char *p, *cur, *next;
6463
6464 /* calculate maximum number of params and allocate force_tbl */
6465 for (p = ata_force_param_buf; *p; p++)
6466 if (*p == ',')
6467 size++;
6468
6469 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6470 if (!ata_force_tbl) {
6471 printk(KERN_WARNING "ata: failed to extend force table, "
6472 "libata.force ignored\n");
6473 return;
6474 }
6475
6476 /* parse and populate the table */
6477 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6478 const char *reason = "";
6479 struct ata_force_ent te = { .port = -1, .device = -1 };
6480
6481 next = cur;
6482 if (ata_parse_force_one(&next, &te, &reason)) {
6483 printk(KERN_WARNING "ata: failed to parse force "
6484 "parameter \"%s\" (%s)\n",
6485 cur, reason);
6486 continue;
6487 }
6488
6489 if (te.port == -1) {
6490 te.port = last_port;
6491 te.device = last_device;
6492 }
6493
6494 ata_force_tbl[idx++] = te;
6495
6496 last_port = te.port;
6497 last_device = te.device;
6498 }
6499
6500 ata_force_tbl_size = idx;
6501}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006502
Linus Torvalds1da177e2005-04-16 15:20:36 -07006503static int __init ata_init(void)
6504{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006505 int rc;
Tejun Heo270390e2010-05-10 21:41:35 +02006506
Tejun Heo33267322008-02-13 09:15:09 +09006507 ata_parse_force_param();
6508
Tejun Heo270390e2010-05-10 21:41:35 +02006509 rc = ata_sff_init();
Tejun Heoad72cf92010-07-02 10:03:52 +02006510 if (rc) {
6511 kfree(ata_force_tbl);
6512 return rc;
6513 }
Tejun Heo453b07a2006-05-31 18:27:42 +09006514
Gwendal Grignoud9027472010-05-25 12:31:38 -07006515 libata_transport_init();
6516 ata_scsi_transport_template = ata_attach_transport();
6517 if (!ata_scsi_transport_template) {
6518 ata_sff_exit();
6519 rc = -ENOMEM;
6520 goto err_out;
Jeff Garzik4fca3772011-02-15 01:13:24 -05006521 }
Gwendal Grignoud9027472010-05-25 12:31:38 -07006522
Linus Torvalds1da177e2005-04-16 15:20:36 -07006523 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6524 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006525
6526err_out:
6527 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006528}
6529
6530static void __exit ata_exit(void)
6531{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006532 ata_release_transport(ata_scsi_transport_template);
6533 libata_transport_exit();
Tejun Heo270390e2010-05-10 21:41:35 +02006534 ata_sff_exit();
Tejun Heo33267322008-02-13 09:15:09 +09006535 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006536}
6537
Brian Kinga4625082006-11-13 16:32:36 -06006538subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006539module_exit(ata_exit);
6540
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006541static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
Jeff Garzik67846b32005-10-05 02:58:32 -04006542
6543int ata_ratelimit(void)
6544{
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006545 return __ratelimit(&ratelimit);
Jeff Garzik67846b32005-10-05 02:58:32 -04006546}
6547
Tejun Heoc0c362b2010-09-06 17:57:14 +02006548/**
6549 * ata_msleep - ATA EH owner aware msleep
6550 * @ap: ATA port to attribute the sleep to
6551 * @msecs: duration to sleep in milliseconds
6552 *
6553 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6554 * ownership is released before going to sleep and reacquired
6555 * after the sleep is complete. IOW, other ports sharing the
6556 * @ap->host will be allowed to own the EH while this task is
6557 * sleeping.
6558 *
6559 * LOCKING:
6560 * Might sleep.
6561 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006562void ata_msleep(struct ata_port *ap, unsigned int msecs)
6563{
Tejun Heoc0c362b2010-09-06 17:57:14 +02006564 bool owns_eh = ap && ap->host->eh_owner == current;
6565
6566 if (owns_eh)
6567 ata_eh_release(ap);
6568
Tejun Heo97750ce2010-09-06 17:56:29 +02006569 msleep(msecs);
Tejun Heoc0c362b2010-09-06 17:57:14 +02006570
6571 if (owns_eh)
6572 ata_eh_acquire(ap);
Tejun Heo97750ce2010-09-06 17:56:29 +02006573}
6574
Tejun Heoc22daff2006-04-11 22:22:29 +09006575/**
6576 * ata_wait_register - wait until register value changes
Tejun Heo97750ce2010-09-06 17:56:29 +02006577 * @ap: ATA port to wait register for, can be NULL
Tejun Heoc22daff2006-04-11 22:22:29 +09006578 * @reg: IO-mapped register
6579 * @mask: Mask to apply to read register value
6580 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006581 * @interval: polling interval in milliseconds
6582 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006583 *
6584 * Waiting for some bits of register to change is a common
6585 * operation for ATA controllers. This function reads 32bit LE
6586 * IO-mapped register @reg and tests for the following condition.
6587 *
6588 * (*@reg & mask) != val
6589 *
6590 * If the condition is met, it returns; otherwise, the process is
6591 * repeated after @interval_msec until timeout.
6592 *
6593 * LOCKING:
6594 * Kernel thread context (may sleep)
6595 *
6596 * RETURNS:
6597 * The final register value.
6598 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006599u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006600 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006601{
Tejun Heo341c2c92008-05-20 02:17:51 +09006602 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006603 u32 tmp;
6604
6605 tmp = ioread32(reg);
6606
6607 /* Calculate timeout _after_ the first read to make sure
6608 * preceding writes reach the controller before starting to
6609 * eat away the timeout.
6610 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006611 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006612
Tejun Heo341c2c92008-05-20 02:17:51 +09006613 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
Tejun Heo97750ce2010-09-06 17:56:29 +02006614 ata_msleep(ap, interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006615 tmp = ioread32(reg);
6616 }
6617
6618 return tmp;
6619}
6620
Linus Torvalds1da177e2005-04-16 15:20:36 -07006621/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006622 * Dummy port_ops
6623 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006624static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6625{
6626 return AC_ERR_SYSTEM;
6627}
6628
Tejun Heo182d7bb2008-04-07 22:47:21 +09006629static void ata_dummy_error_handler(struct ata_port *ap)
6630{
6631 /* truly dummy */
6632}
6633
Tejun Heo029cfd62008-03-25 12:22:49 +09006634struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006635 .qc_prep = ata_noop_qc_prep,
6636 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006637 .error_handler = ata_dummy_error_handler,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006638};
6639
Tejun Heo21b0ad42007-04-17 23:44:07 +09006640const struct ata_port_info ata_dummy_port_info = {
6641 .port_ops = &ata_dummy_port_ops,
6642};
6643
Tejun Heodd5b06c2006-08-10 16:59:12 +09006644/*
Joe Perchesa9a79df2011-04-15 15:51:59 -07006645 * Utility print functions
6646 */
6647int ata_port_printk(const struct ata_port *ap, const char *level,
6648 const char *fmt, ...)
6649{
6650 struct va_format vaf;
6651 va_list args;
6652 int r;
6653
6654 va_start(args, fmt);
6655
6656 vaf.fmt = fmt;
6657 vaf.va = &args;
6658
6659 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6660
6661 va_end(args);
6662
6663 return r;
6664}
6665EXPORT_SYMBOL(ata_port_printk);
6666
6667int ata_link_printk(const struct ata_link *link, const char *level,
6668 const char *fmt, ...)
6669{
6670 struct va_format vaf;
6671 va_list args;
6672 int r;
6673
6674 va_start(args, fmt);
6675
6676 vaf.fmt = fmt;
6677 vaf.va = &args;
6678
6679 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6680 r = printk("%sata%u.%02u: %pV",
6681 level, link->ap->print_id, link->pmp, &vaf);
6682 else
6683 r = printk("%sata%u: %pV",
6684 level, link->ap->print_id, &vaf);
6685
6686 va_end(args);
6687
6688 return r;
6689}
6690EXPORT_SYMBOL(ata_link_printk);
6691
6692int ata_dev_printk(const struct ata_device *dev, const char *level,
6693 const char *fmt, ...)
6694{
6695 struct va_format vaf;
6696 va_list args;
6697 int r;
6698
6699 va_start(args, fmt);
6700
6701 vaf.fmt = fmt;
6702 vaf.va = &args;
6703
6704 r = printk("%sata%u.%02u: %pV",
6705 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6706 &vaf);
6707
6708 va_end(args);
6709
6710 return r;
6711}
6712EXPORT_SYMBOL(ata_dev_printk);
6713
Joe Perches06296a12011-04-15 15:52:00 -07006714void ata_print_version(const struct device *dev, const char *version)
6715{
6716 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6717}
6718EXPORT_SYMBOL(ata_print_version);
6719
Joe Perchesa9a79df2011-04-15 15:51:59 -07006720/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006721 * libata is essentially a library of internal helper functions for
6722 * low-level ATA host controller drivers. As such, the API/ABI is
6723 * likely to change as new drivers are added and updated.
6724 * Do not depend on ABI/API stability.
6725 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006726EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6727EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6728EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006729EXPORT_SYMBOL_GPL(ata_base_port_ops);
6730EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006731EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006732EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heo1eca4362008-11-03 20:03:17 +09006733EXPORT_SYMBOL_GPL(ata_link_next);
6734EXPORT_SYMBOL_GPL(ata_dev_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006735EXPORT_SYMBOL_GPL(ata_std_bios_param);
Tejun Heod8d91292010-05-15 20:09:34 +02006736EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
Jeff Garzikcca39742006-08-24 03:19:22 -04006737EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006738EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006739EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006740EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006741EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006742EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006743EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09006744EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006745EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006746EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006747EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006748EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006749EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6750EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006751EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6752EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6753EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6754EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6755EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6756EXPORT_SYMBOL_GPL(ata_mode_string);
6757EXPORT_SYMBOL_GPL(ata_id_xfermask);
Alan04351822007-03-06 02:37:52 -08006758EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006759EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006760EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Alan10305f02007-02-20 18:01:59 +00006761EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006762EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006763EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006764EXPORT_SYMBOL_GPL(sata_link_debounce);
6765EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo1152b262010-09-01 17:50:05 +02006766EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
Tejun Heo0aa11132008-04-07 22:47:18 +09006767EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006768EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006769EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006770EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006771EXPORT_SYMBOL_GPL(ata_dev_classify);
6772EXPORT_SYMBOL_GPL(ata_dev_pair);
Jeff Garzik67846b32005-10-05 02:58:32 -04006773EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heo97750ce2010-09-06 17:56:29 +02006774EXPORT_SYMBOL_GPL(ata_msleep);
Tejun Heoc22daff2006-04-11 22:22:29 +09006775EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006776EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006777EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006778EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006779EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Dan Williamsf6e67032011-09-20 15:10:33 -07006780EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006781EXPORT_SYMBOL_GPL(sata_scr_valid);
6782EXPORT_SYMBOL_GPL(sata_scr_read);
6783EXPORT_SYMBOL_GPL(sata_scr_write);
6784EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006785EXPORT_SYMBOL_GPL(ata_link_online);
6786EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006787#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006788EXPORT_SYMBOL_GPL(ata_host_suspend);
6789EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006790#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006791EXPORT_SYMBOL_GPL(ata_id_string);
6792EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006793EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006794EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6795
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006796EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006797EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006798EXPORT_SYMBOL_GPL(ata_timing_compute);
6799EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006800EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006801
Linus Torvalds1da177e2005-04-16 15:20:36 -07006802#ifdef CONFIG_PCI
6803EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006804EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006805#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006806EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6807EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006808EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6809EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006810#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006811#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006812
Tejun Heob64bbc32007-07-16 14:29:39 +09006813EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6814EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6815EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09006816EXPORT_SYMBOL_GPL(ata_port_desc);
6817#ifdef CONFIG_PCI
6818EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6819#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09006820EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09006821EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006822EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006823EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09006824EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09006825EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6826EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006827EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6828EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04006829EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09006830EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09006831EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006832
6833EXPORT_SYMBOL_GPL(ata_cable_40wire);
6834EXPORT_SYMBOL_GPL(ata_cable_80wire);
6835EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09006836EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006837EXPORT_SYMBOL_GPL(ata_cable_sata);