blob: 1a3dbd1b196ecb121b1ee9d34388ecd00c307b71 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
Tejun Heo8c3d3d42013-05-14 11:09:50 -07004 * Maintained by: Tejun Heo <tj@kernel.org>
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04005 * 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>
Brian Norrisb7db04d2012-11-02 12:29:32 -070070#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72#include "libata.h"
Gwendal Grignoud9027472010-05-25 12:31:38 -070073#include "libata-transport.h"
Jeff Garzikfda0efc2007-01-31 07:43:15 -050074
Tejun Heod7bb4cc2006-05-31 18:27:46 +090075/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090076const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
77const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
78const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090079
Tejun Heo029cfd62008-03-25 12:22:49 +090080const struct ata_port_operations ata_base_port_ops = {
Tejun Heo0aa11132008-04-07 22:47:18 +090081 .prereset = ata_std_prereset,
Tejun Heo203c75b2008-04-07 22:47:18 +090082 .postreset = ata_std_postreset,
Tejun Heoa1efdab2008-03-25 12:22:50 +090083 .error_handler = ata_std_error_handler,
Dan Williamse4a9c372012-06-21 23:25:27 -070084 .sched_eh = ata_std_sched_eh,
85 .end_eh = ata_std_end_eh,
Tejun Heo029cfd62008-03-25 12:22:49 +090086};
87
88const struct ata_port_operations sata_port_ops = {
89 .inherits = &ata_base_port_ops,
90
91 .qc_defer = ata_std_qc_defer,
Tejun Heo57c9efd2008-04-07 22:47:19 +090092 .hardreset = sata_std_hardreset,
Tejun Heo029cfd62008-03-25 12:22:49 +090093};
94
Tejun Heo3373efd2006-05-15 20:57:53 +090095static unsigned int ata_dev_init_params(struct ata_device *dev,
96 u16 heads, u16 sectors);
97static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
98static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090099static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Tero Roponena78f57a2012-04-22 11:38:00 +0300101atomic_t ata_print_id = ATOMIC_INIT(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Tejun Heo33267322008-02-13 09:15:09 +0900103struct ata_force_param {
104 const char *name;
105 unsigned int cbl;
106 int spd_limit;
107 unsigned long xfer_mask;
108 unsigned int horkage_on;
109 unsigned int horkage_off;
Tejun Heo05944bd2008-08-13 20:19:09 +0900110 unsigned int lflags;
Tejun Heo33267322008-02-13 09:15:09 +0900111};
112
113struct ata_force_ent {
114 int port;
115 int device;
116 struct ata_force_param param;
117};
118
119static struct ata_force_ent *ata_force_tbl;
120static int ata_force_tbl_size;
121
122static char ata_force_param_buf[PAGE_SIZE] __initdata;
Tejun Heo7afb4222008-03-09 20:21:53 +0900123/* param_buf is thrown away after initialization, disallow read */
124module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
Tejun Heo33267322008-02-13 09:15:09 +0900125MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
126
Tejun Heo2486fa52008-07-31 07:52:40 +0900127static int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -0400128module_param(atapi_enabled, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200129MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
Jeff Garzik1623c812005-08-30 03:37:42 -0400130
Adrian Bunkc5c61bd2008-02-25 02:07:25 +0200131static int atapi_dmadir = 0;
Albert Lee95de7192006-04-04 10:57:18 +0800132module_param(atapi_dmadir, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200133MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
Albert Lee95de7192006-04-04 10:57:18 +0800134
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900135int atapi_passthru16 = 1;
136module_param(atapi_passthru16, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200137MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900138
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500139int libata_fua = 0;
140module_param_named(fua, libata_fua, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200141MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500142
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400143static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100144module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
145MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
146
Alan Coxb3a70602007-10-02 12:38:26 -0400147static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
148module_param_named(dma, libata_dma_mask, int, 0444);
149MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
150
Tejun Heo87fbc5a2008-05-20 02:17:54 +0900151static int ata_probe_timeout;
Andrew Mortona8601e52006-06-25 01:36:52 -0700152module_param(ata_probe_timeout, int, 0444);
153MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
154
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400155int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400156module_param_named(noacpi, libata_noacpi, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200157MODULE_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 -0700158
Alan Coxae8d4ee2007-11-04 22:05:49 -0500159int libata_allow_tpm = 0;
160module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200161MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
Alan Coxae8d4ee2007-11-04 22:05:49 -0500162
Tejun Heoe7ecd432010-05-19 15:38:58 +0200163static int atapi_an;
164module_param(atapi_an, int, 0444);
165MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167MODULE_AUTHOR("Jeff Garzik");
168MODULE_DESCRIPTION("Library module for ATA devices");
169MODULE_LICENSE("GPL");
170MODULE_VERSION(DRV_VERSION);
171
Edward Falk0baab862005-06-02 18:17:13 -0400172
Tejun Heo9913ff82009-01-29 20:31:31 +0900173static bool ata_sstatus_online(u32 sstatus)
174{
175 return (sstatus & 0xf) == 0x3;
176}
177
Tejun Heo1eca4362008-11-03 20:03:17 +0900178/**
179 * ata_link_next - link iteration helper
180 * @link: the previous link, NULL to start
181 * @ap: ATA port containing links to iterate
182 * @mode: iteration mode, one of ATA_LITER_*
Tejun Heoaadffb62008-07-31 17:02:41 +0900183 *
Tejun Heo1eca4362008-11-03 20:03:17 +0900184 * LOCKING:
185 * Host lock or EH context.
186 *
187 * RETURNS:
188 * Pointer to the next link.
Tejun Heoaadffb62008-07-31 17:02:41 +0900189 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900190struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
191 enum ata_link_iter_mode mode)
Tejun Heoaadffb62008-07-31 17:02:41 +0900192{
Tejun Heo1eca4362008-11-03 20:03:17 +0900193 BUG_ON(mode != ATA_LITER_EDGE &&
194 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
Tejun Heoaadffb62008-07-31 17:02:41 +0900195
Tejun Heo1eca4362008-11-03 20:03:17 +0900196 /* NULL link indicates start of iteration */
197 if (!link)
198 switch (mode) {
199 case ATA_LITER_EDGE:
200 case ATA_LITER_PMP_FIRST:
201 if (sata_pmp_attached(ap))
202 return ap->pmp_link;
203 /* fall through */
204 case ATA_LITER_HOST_FIRST:
205 return &ap->link;
206 }
207
208 /* we just iterated over the host link, what's next? */
209 if (link == &ap->link)
210 switch (mode) {
211 case ATA_LITER_HOST_FIRST:
212 if (sata_pmp_attached(ap))
213 return ap->pmp_link;
214 /* fall through */
215 case ATA_LITER_PMP_FIRST:
216 if (unlikely(ap->slave_link))
Tejun Heob1c72912008-07-31 17:02:43 +0900217 return ap->slave_link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900218 /* fall through */
219 case ATA_LITER_EDGE:
Tejun Heoaadffb62008-07-31 17:02:41 +0900220 return NULL;
Tejun Heob1c72912008-07-31 17:02:43 +0900221 }
Tejun Heoaadffb62008-07-31 17:02:41 +0900222
Tejun Heob1c72912008-07-31 17:02:43 +0900223 /* slave_link excludes PMP */
224 if (unlikely(link == ap->slave_link))
225 return NULL;
226
Tejun Heo1eca4362008-11-03 20:03:17 +0900227 /* we were over a PMP link */
Tejun Heoaadffb62008-07-31 17:02:41 +0900228 if (++link < ap->pmp_link + ap->nr_pmp_links)
229 return link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900230
231 if (mode == ATA_LITER_PMP_FIRST)
232 return &ap->link;
233
Tejun Heoaadffb62008-07-31 17:02:41 +0900234 return NULL;
235}
236
Edward Falk0baab862005-06-02 18:17:13 -0400237/**
Tejun Heo1eca4362008-11-03 20:03:17 +0900238 * ata_dev_next - device iteration helper
239 * @dev: the previous device, NULL to start
240 * @link: ATA link containing devices to iterate
241 * @mode: iteration mode, one of ATA_DITER_*
242 *
243 * LOCKING:
244 * Host lock or EH context.
245 *
246 * RETURNS:
247 * Pointer to the next device.
248 */
249struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
250 enum ata_dev_iter_mode mode)
251{
252 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
253 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
254
255 /* NULL dev indicates start of iteration */
256 if (!dev)
257 switch (mode) {
258 case ATA_DITER_ENABLED:
259 case ATA_DITER_ALL:
260 dev = link->device;
261 goto check;
262 case ATA_DITER_ENABLED_REVERSE:
263 case ATA_DITER_ALL_REVERSE:
264 dev = link->device + ata_link_max_devices(link) - 1;
265 goto check;
266 }
267
268 next:
269 /* move to the next one */
270 switch (mode) {
271 case ATA_DITER_ENABLED:
272 case ATA_DITER_ALL:
273 if (++dev < link->device + ata_link_max_devices(link))
274 goto check;
275 return NULL;
276 case ATA_DITER_ENABLED_REVERSE:
277 case ATA_DITER_ALL_REVERSE:
278 if (--dev >= link->device)
279 goto check;
280 return NULL;
281 }
282
283 check:
284 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
285 !ata_dev_enabled(dev))
286 goto next;
287 return dev;
288}
289
290/**
Tejun Heob1c72912008-07-31 17:02:43 +0900291 * ata_dev_phys_link - find physical link for a device
292 * @dev: ATA device to look up physical link for
293 *
294 * Look up physical link which @dev is attached to. Note that
295 * this is different from @dev->link only when @dev is on slave
296 * link. For all other cases, it's the same as @dev->link.
297 *
298 * LOCKING:
299 * Don't care.
300 *
301 * RETURNS:
302 * Pointer to the found physical link.
303 */
304struct ata_link *ata_dev_phys_link(struct ata_device *dev)
305{
306 struct ata_port *ap = dev->link->ap;
307
308 if (!ap->slave_link)
309 return dev->link;
310 if (!dev->devno)
311 return &ap->link;
312 return ap->slave_link;
313}
314
315/**
Tejun Heo33267322008-02-13 09:15:09 +0900316 * ata_force_cbl - force cable type according to libata.force
Randy Dunlap4cdfa1b2008-02-22 12:21:37 -0800317 * @ap: ATA port of interest
Tejun Heo33267322008-02-13 09:15:09 +0900318 *
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
323 * same effect.
324 *
325 * LOCKING:
326 * EH context.
327 */
328void ata_force_cbl(struct ata_port *ap)
329{
330 int i;
331
332 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
333 const struct ata_force_ent *fe = &ata_force_tbl[i];
334
335 if (fe->port != -1 && fe->port != ap->print_id)
336 continue;
337
338 if (fe->param.cbl == ATA_CBL_NONE)
339 continue;
340
341 ap->cbl = fe->param.cbl;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900343 return;
344 }
345}
346
347/**
Tejun Heo05944bd2008-08-13 20:19:09 +0900348 * ata_force_link_limits - force link limits according to libata.force
Tejun Heo33267322008-02-13 09:15:09 +0900349 * @link: ATA link of interest
350 *
Tejun Heo05944bd2008-08-13 20:19:09 +0900351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
Tejun Heob1c72912008-07-31 17:02:43 +0900357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
Tejun Heo33267322008-02-13 09:15:09 +0900359 *
360 * LOCKING:
361 * EH context.
362 */
Tejun Heo05944bd2008-08-13 20:19:09 +0900363static void ata_force_link_limits(struct ata_link *link)
Tejun Heo33267322008-02-13 09:15:09 +0900364{
Tejun Heo05944bd2008-08-13 20:19:09 +0900365 bool did_spd = false;
Tejun Heob1c72912008-07-31 17:02:43 +0900366 int linkno = link->pmp;
367 int i;
Tejun Heo33267322008-02-13 09:15:09 +0900368
369 if (ata_is_host_link(link))
Tejun Heob1c72912008-07-31 17:02:43 +0900370 linkno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900371
372 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
373 const struct ata_force_ent *fe = &ata_force_tbl[i];
374
375 if (fe->port != -1 && fe->port != link->ap->print_id)
376 continue;
377
378 if (fe->device != -1 && fe->device != linkno)
379 continue;
380
Tejun Heo05944bd2008-08-13 20:19:09 +0900381 /* only honor the first spd limit */
382 if (!did_spd && fe->param.spd_limit) {
383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
Tejun Heo05944bd2008-08-13 20:19:09 +0900385 fe->param.name);
386 did_spd = true;
387 }
Tejun Heo33267322008-02-13 09:15:09 +0900388
Tejun Heo05944bd2008-08-13 20:19:09 +0900389 /* let lflags stack */
390 if (fe->param.lflags) {
391 link->flags |= fe->param.lflags;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700392 ata_link_notice(link,
Tejun Heo05944bd2008-08-13 20:19:09 +0900393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe->param.lflags, link->flags);
395 }
Tejun Heo33267322008-02-13 09:15:09 +0900396 }
397}
398
399/**
400 * ata_force_xfermask - force xfermask according to libata.force
401 * @dev: ATA device of interest
402 *
403 * Force xfer_mask according to libata.force and whine about it.
404 * For consistency with link selection, device number 15 selects
405 * the first device connected to the host link.
406 *
407 * LOCKING:
408 * EH context.
409 */
410static void ata_force_xfermask(struct ata_device *dev)
411{
412 int devno = dev->link->pmp + dev->devno;
413 int alt_devno = devno;
414 int i;
415
Tejun Heob1c72912008-07-31 17:02:43 +0900416 /* allow n.15/16 for devices attached to host port */
417 if (ata_is_host_link(dev->link))
418 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900419
420 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
421 const struct ata_force_ent *fe = &ata_force_tbl[i];
422 unsigned long pio_mask, mwdma_mask, udma_mask;
423
424 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
425 continue;
426
427 if (fe->device != -1 && fe->device != devno &&
428 fe->device != alt_devno)
429 continue;
430
431 if (!fe->param.xfer_mask)
432 continue;
433
434 ata_unpack_xfermask(fe->param.xfer_mask,
435 &pio_mask, &mwdma_mask, &udma_mask);
436 if (udma_mask)
437 dev->udma_mask = udma_mask;
438 else if (mwdma_mask) {
439 dev->udma_mask = 0;
440 dev->mwdma_mask = mwdma_mask;
441 } else {
442 dev->udma_mask = 0;
443 dev->mwdma_mask = 0;
444 dev->pio_mask = pio_mask;
445 }
446
Joe Perchesa9a79df2011-04-15 15:51:59 -0700447 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
448 fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900449 return;
450 }
451}
452
453/**
454 * ata_force_horkage - force horkage according to libata.force
455 * @dev: ATA device of interest
456 *
457 * Force horkage according to libata.force and whine about it.
458 * For consistency with link selection, device number 15 selects
459 * the first device connected to the host link.
460 *
461 * LOCKING:
462 * EH context.
463 */
464static void ata_force_horkage(struct ata_device *dev)
465{
466 int devno = dev->link->pmp + dev->devno;
467 int alt_devno = devno;
468 int i;
469
Tejun Heob1c72912008-07-31 17:02:43 +0900470 /* allow n.15/16 for devices attached to host port */
471 if (ata_is_host_link(dev->link))
472 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900473
474 for (i = 0; i < ata_force_tbl_size; i++) {
475 const struct ata_force_ent *fe = &ata_force_tbl[i];
476
477 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
478 continue;
479
480 if (fe->device != -1 && fe->device != devno &&
481 fe->device != alt_devno)
482 continue;
483
484 if (!(~dev->horkage & fe->param.horkage_on) &&
485 !(dev->horkage & fe->param.horkage_off))
486 continue;
487
488 dev->horkage |= fe->param.horkage_on;
489 dev->horkage &= ~fe->param.horkage_off;
490
Joe Perchesa9a79df2011-04-15 15:51:59 -0700491 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
492 fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900493 }
494}
495
496/**
Tejun Heo436d34b2008-04-02 17:28:46 +0900497 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
498 * @opcode: SCSI opcode
499 *
500 * Determine ATAPI command type from @opcode.
501 *
502 * LOCKING:
503 * None.
504 *
505 * RETURNS:
506 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
507 */
508int atapi_cmd_type(u8 opcode)
509{
510 switch (opcode) {
511 case GPCMD_READ_10:
512 case GPCMD_READ_12:
513 return ATAPI_READ;
514
515 case GPCMD_WRITE_10:
516 case GPCMD_WRITE_12:
517 case GPCMD_WRITE_AND_VERIFY_10:
518 return ATAPI_WRITE;
519
520 case GPCMD_READ_CD:
521 case GPCMD_READ_CD_MSF:
522 return ATAPI_READ_CD;
523
Tejun Heoe52dcc42008-04-02 17:35:19 +0900524 case ATA_16:
525 case ATA_12:
526 if (atapi_passthru16)
527 return ATAPI_PASS_THRU;
528 /* fall thru */
Tejun Heo436d34b2008-04-02 17:28:46 +0900529 default:
530 return ATAPI_MISC;
531 }
532}
533
534/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
536 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900538 * @is_cmd: This FIS is for command
539 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 *
541 * Converts a standard ATA taskfile to a Serial ATA
542 * FIS structure (Register - Host to Device).
543 *
544 * LOCKING:
545 * Inherited from caller.
546 */
Tejun Heo99771262007-07-16 14:29:38 +0900547void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{
Tejun Heo99771262007-07-16 14:29:38 +0900549 fis[0] = 0x27; /* Register - Host to Device FIS */
550 fis[1] = pmp & 0xf; /* Port multiplier number*/
551 if (is_cmd)
552 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 fis[2] = tf->command;
555 fis[3] = tf->feature;
556
557 fis[4] = tf->lbal;
558 fis[5] = tf->lbam;
559 fis[6] = tf->lbah;
560 fis[7] = tf->device;
561
562 fis[8] = tf->hob_lbal;
563 fis[9] = tf->hob_lbam;
564 fis[10] = tf->hob_lbah;
565 fis[11] = tf->hob_feature;
566
567 fis[12] = tf->nsect;
568 fis[13] = tf->hob_nsect;
569 fis[14] = 0;
570 fis[15] = tf->ctl;
571
Marc Carino86a565e2013-09-01 08:59:01 -0700572 fis[16] = tf->auxiliary & 0xff;
573 fis[17] = (tf->auxiliary >> 8) & 0xff;
574 fis[18] = (tf->auxiliary >> 16) & 0xff;
575 fis[19] = (tf->auxiliary >> 24) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576}
577
578/**
579 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
580 * @fis: Buffer from which data will be input
581 * @tf: Taskfile to output
582 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500583 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 *
585 * LOCKING:
586 * Inherited from caller.
587 */
588
Jeff Garzik057ace52005-10-22 14:27:05 -0400589void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
591 tf->command = fis[2]; /* status */
592 tf->feature = fis[3]; /* error */
593
594 tf->lbal = fis[4];
595 tf->lbam = fis[5];
596 tf->lbah = fis[6];
597 tf->device = fis[7];
598
599 tf->hob_lbal = fis[8];
600 tf->hob_lbam = fis[9];
601 tf->hob_lbah = fis[10];
602
603 tf->nsect = fis[12];
604 tf->hob_nsect = fis[13];
605}
606
Albert Lee8cbd6df2005-10-12 15:06:27 +0800607static const u8 ata_rw_cmds[] = {
608 /* pio multi */
609 ATA_CMD_READ_MULTI,
610 ATA_CMD_WRITE_MULTI,
611 ATA_CMD_READ_MULTI_EXT,
612 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100613 0,
614 0,
615 0,
616 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800617 /* pio */
618 ATA_CMD_PIO_READ,
619 ATA_CMD_PIO_WRITE,
620 ATA_CMD_PIO_READ_EXT,
621 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100622 0,
623 0,
624 0,
625 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800626 /* dma */
627 ATA_CMD_READ,
628 ATA_CMD_WRITE,
629 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100630 ATA_CMD_WRITE_EXT,
631 0,
632 0,
633 0,
634 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800635};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
637/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800638 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900639 * @tf: command to examine and configure
640 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500642 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800643 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 *
645 * LOCKING:
646 * caller.
647 */
Tejun Heobd056d72006-11-14 22:47:10 +0900648static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100650 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100652 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500653
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100654 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800655 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
656 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
Albert Lee8cbd6df2005-10-12 15:06:27 +0800658 if (dev->flags & ATA_DFLAG_PIO) {
659 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100660 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900661 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000662 /* Unable to use DMA due to host limitation */
663 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800664 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800665 } else {
666 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100667 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800668 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100670 cmd = ata_rw_cmds[index + fua + lba48 + write];
671 if (cmd) {
672 tf->command = cmd;
673 return 0;
674 }
675 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676}
677
Tejun Heocb95d562006-03-06 04:31:56 +0900678/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900679 * ata_tf_read_block - Read block address from ATA taskfile
680 * @tf: ATA taskfile of interest
681 * @dev: ATA device @tf belongs to
682 *
683 * LOCKING:
684 * None.
685 *
686 * Read block address from @tf. This function can handle all
687 * three address formats - LBA, LBA48 and CHS. tf->protocol and
688 * flags select the address format to use.
689 *
690 * RETURNS:
691 * Block address read from @tf.
692 */
693u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
694{
695 u64 block = 0;
696
697 if (tf->flags & ATA_TFLAG_LBA) {
698 if (tf->flags & ATA_TFLAG_LBA48) {
699 block |= (u64)tf->hob_lbah << 40;
700 block |= (u64)tf->hob_lbam << 32;
Roland Dreier44901a92008-11-04 10:34:48 -0800701 block |= (u64)tf->hob_lbal << 24;
Tejun Heo35b649f2006-11-14 22:37:35 +0900702 } else
703 block |= (tf->device & 0xf) << 24;
704
705 block |= tf->lbah << 16;
706 block |= tf->lbam << 8;
707 block |= tf->lbal;
708 } else {
709 u32 cyl, head, sect;
710
711 cyl = tf->lbam | (tf->lbah << 8);
712 head = tf->device & 0xf;
713 sect = tf->lbal;
714
Tejun Heoac8672e2009-08-16 21:21:21 +0900715 if (!sect) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700716 ata_dev_warn(dev,
717 "device reported invalid CHS sector 0\n");
Tejun Heoac8672e2009-08-16 21:21:21 +0900718 sect = 1; /* oh well */
719 }
720
721 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
Tejun Heo35b649f2006-11-14 22:37:35 +0900722 }
723
724 return block;
725}
726
727/**
Tejun Heobd056d72006-11-14 22:47:10 +0900728 * ata_build_rw_tf - Build ATA taskfile for given read/write request
729 * @tf: Target ATA taskfile
730 * @dev: ATA device @tf belongs to
731 * @block: Block address
732 * @n_block: Number of blocks
733 * @tf_flags: RW/FUA etc...
734 * @tag: tag
735 *
736 * LOCKING:
737 * None.
738 *
739 * Build ATA taskfile @tf for read/write request described by
740 * @block, @n_block, @tf_flags and @tag on @dev.
741 *
742 * RETURNS:
743 *
744 * 0 on success, -ERANGE if the request is too large for @dev,
745 * -EINVAL if the request is invalid.
746 */
747int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
748 u64 block, u32 n_block, unsigned int tf_flags,
749 unsigned int tag)
750{
751 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
752 tf->flags |= tf_flags;
753
Tejun Heo6d1245b2007-02-20 23:20:27 +0900754 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900755 /* yay, NCQ */
756 if (!lba_48_ok(block, n_block))
757 return -ERANGE;
758
759 tf->protocol = ATA_PROT_NCQ;
760 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
761
762 if (tf->flags & ATA_TFLAG_WRITE)
763 tf->command = ATA_CMD_FPDMA_WRITE;
764 else
765 tf->command = ATA_CMD_FPDMA_READ;
766
767 tf->nsect = tag << 3;
768 tf->hob_feature = (n_block >> 8) & 0xff;
769 tf->feature = n_block & 0xff;
770
771 tf->hob_lbah = (block >> 40) & 0xff;
772 tf->hob_lbam = (block >> 32) & 0xff;
773 tf->hob_lbal = (block >> 24) & 0xff;
774 tf->lbah = (block >> 16) & 0xff;
775 tf->lbam = (block >> 8) & 0xff;
776 tf->lbal = block & 0xff;
777
Sergei Shtylyov9ca7cfa2012-08-21 22:18:50 +0400778 tf->device = ATA_LBA;
Tejun Heobd056d72006-11-14 22:47:10 +0900779 if (tf->flags & ATA_TFLAG_FUA)
780 tf->device |= 1 << 7;
781 } else if (dev->flags & ATA_DFLAG_LBA) {
782 tf->flags |= ATA_TFLAG_LBA;
783
784 if (lba_28_ok(block, n_block)) {
785 /* use LBA28 */
786 tf->device |= (block >> 24) & 0xf;
787 } else if (lba_48_ok(block, n_block)) {
788 if (!(dev->flags & ATA_DFLAG_LBA48))
789 return -ERANGE;
790
791 /* use LBA48 */
792 tf->flags |= ATA_TFLAG_LBA48;
793
794 tf->hob_nsect = (n_block >> 8) & 0xff;
795
796 tf->hob_lbah = (block >> 40) & 0xff;
797 tf->hob_lbam = (block >> 32) & 0xff;
798 tf->hob_lbal = (block >> 24) & 0xff;
799 } else
800 /* request too large even for LBA48 */
801 return -ERANGE;
802
803 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
804 return -EINVAL;
805
806 tf->nsect = n_block & 0xff;
807
808 tf->lbah = (block >> 16) & 0xff;
809 tf->lbam = (block >> 8) & 0xff;
810 tf->lbal = block & 0xff;
811
812 tf->device |= ATA_LBA;
813 } else {
814 /* CHS */
815 u32 sect, head, cyl, track;
816
817 /* The request -may- be too large for CHS addressing. */
818 if (!lba_28_ok(block, n_block))
819 return -ERANGE;
820
821 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
822 return -EINVAL;
823
824 /* Convert LBA to CHS */
825 track = (u32)block / dev->sectors;
826 cyl = track / dev->heads;
827 head = track % dev->heads;
828 sect = (u32)block % dev->sectors + 1;
829
830 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
831 (u32)block, track, cyl, head, sect);
832
833 /* Check whether the converted CHS can fit.
834 Cylinder: 0-65535
835 Head: 0-15
836 Sector: 1-255*/
837 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
838 return -ERANGE;
839
840 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
841 tf->lbal = sect;
842 tf->lbam = cyl;
843 tf->lbah = cyl >> 8;
844 tf->device |= head;
845 }
846
847 return 0;
848}
849
850/**
Tejun Heocb95d562006-03-06 04:31:56 +0900851 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
852 * @pio_mask: pio_mask
853 * @mwdma_mask: mwdma_mask
854 * @udma_mask: udma_mask
855 *
856 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
857 * unsigned int xfer_mask.
858 *
859 * LOCKING:
860 * None.
861 *
862 * RETURNS:
863 * Packed xfer_mask.
864 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900865unsigned long ata_pack_xfermask(unsigned long pio_mask,
866 unsigned long mwdma_mask,
867 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900868{
869 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
870 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
871 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
872}
873
Tejun Heoc0489e42006-03-24 14:07:49 +0900874/**
875 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
876 * @xfer_mask: xfer_mask to unpack
877 * @pio_mask: resulting pio_mask
878 * @mwdma_mask: resulting mwdma_mask
879 * @udma_mask: resulting udma_mask
880 *
881 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
882 * Any NULL distination masks will be ignored.
883 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900884void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
885 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900886{
887 if (pio_mask)
888 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
889 if (mwdma_mask)
890 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
891 if (udma_mask)
892 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
893}
894
Tejun Heocb95d562006-03-06 04:31:56 +0900895static const struct ata_xfer_ent {
Tejun Heobe9a50c2006-03-31 22:48:52 +0900896 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900897 u8 base;
898} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900899 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
900 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
901 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900902 { -1, },
903};
904
905/**
906 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
907 * @xfer_mask: xfer_mask of interest
908 *
909 * Return matching XFER_* value for @xfer_mask. Only the highest
910 * bit of @xfer_mask is considered.
911 *
912 * LOCKING:
913 * None.
914 *
915 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900916 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900917 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900918u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900919{
920 int highbit = fls(xfer_mask) - 1;
921 const struct ata_xfer_ent *ent;
922
923 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
924 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
925 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900926 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900927}
928
929/**
930 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
931 * @xfer_mode: XFER_* of interest
932 *
933 * Return matching xfer_mask for @xfer_mode.
934 *
935 * LOCKING:
936 * None.
937 *
938 * RETURNS:
939 * Matching xfer_mask, 0 if no match found.
940 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900941unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900942{
943 const struct ata_xfer_ent *ent;
944
945 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
946 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900947 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
948 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900949 return 0;
950}
951
952/**
953 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
954 * @xfer_mode: XFER_* of interest
955 *
956 * Return matching xfer_shift for @xfer_mode.
957 *
958 * LOCKING:
959 * None.
960 *
961 * RETURNS:
962 * Matching xfer_shift, -1 if no match found.
963 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900964int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900965{
966 const struct ata_xfer_ent *ent;
967
968 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
969 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
970 return ent->shift;
971 return -1;
972}
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900975 * ata_mode_string - convert xfer_mask to string
976 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 *
978 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900979 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 *
981 * LOCKING:
982 * None.
983 *
984 * RETURNS:
985 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900986 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900988const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989{
Tejun Heo75f554b2006-03-06 04:31:57 +0900990 static const char * const xfer_mode_str[] = {
991 "PIO0",
992 "PIO1",
993 "PIO2",
994 "PIO3",
995 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100996 "PIO5",
997 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900998 "MWDMA0",
999 "MWDMA1",
1000 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +01001001 "MWDMA3",
1002 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +09001003 "UDMA/16",
1004 "UDMA/25",
1005 "UDMA/33",
1006 "UDMA/44",
1007 "UDMA/66",
1008 "UDMA/100",
1009 "UDMA/133",
1010 "UDMA7",
1011 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001012 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001014 highbit = fls(xfer_mask) - 1;
1015 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1016 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018}
1019
Gwendal Grignoud9027472010-05-25 12:31:38 -07001020const char *sata_spd_string(unsigned int spd)
Tejun Heo4c360c82006-04-01 01:38:17 +09001021{
1022 static const char * const spd_str[] = {
1023 "1.5 Gbps",
1024 "3.0 Gbps",
Shane Huang8522ee22008-12-30 11:00:37 +08001025 "6.0 Gbps",
Tejun Heo4c360c82006-04-01 01:38:17 +09001026 };
1027
1028 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1029 return "<unknown>";
1030 return spd_str[spd - 1];
1031}
1032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033/**
1034 * ata_dev_classify - determine device type based on ATA-spec signature
1035 * @tf: ATA taskfile register set for device to be identified
1036 *
1037 * Determine from taskfile register contents whether a device is
1038 * ATA or ATAPI, as per "Signature and persistence" section
1039 * of ATA/PI spec (volume 1, sect 5.14).
1040 *
1041 * LOCKING:
1042 * None.
1043 *
1044 * RETURNS:
Tejun Heo633273a32007-09-23 13:19:54 +09001045 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1046 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 */
Jeff Garzik057ace52005-10-22 14:27:05 -04001048unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049{
1050 /* Apple's open source Darwin code hints that some devices only
1051 * put a proper signature into the LBA mid/high registers,
1052 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a32007-09-23 13:19:54 +09001053 *
1054 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1055 * signatures for ATA and ATAPI devices attached on SerialATA,
1056 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1057 * spec has never mentioned about using different signatures
1058 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1059 * Multiplier specification began to use 0x69/0x96 to identify
1060 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1061 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1062 * 0x69/0x96 shortly and described them as reserved for
1063 * SerialATA.
1064 *
1065 * We follow the current spec and consider that 0x69/0x96
1066 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Tejun Heo79b42ba2009-04-15 06:21:10 +09001067 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1068 * SEMB signature. This is worked around in
1069 * ata_dev_read_id().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 */
Tejun Heo633273a32007-09-23 13:19:54 +09001071 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 DPRINTK("found ATA device by sig\n");
1073 return ATA_DEV_ATA;
1074 }
1075
Tejun Heo633273a32007-09-23 13:19:54 +09001076 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 DPRINTK("found ATAPI device by sig\n");
1078 return ATA_DEV_ATAPI;
1079 }
1080
Tejun Heo633273a32007-09-23 13:19:54 +09001081 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1082 DPRINTK("found PMP device by sig\n");
1083 return ATA_DEV_PMP;
1084 }
1085
1086 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001087 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1088 return ATA_DEV_SEMB;
Tejun Heo633273a32007-09-23 13:19:54 +09001089 }
1090
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 DPRINTK("unknown device\n");
1092 return ATA_DEV_UNKNOWN;
1093}
1094
1095/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001096 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 * @id: IDENTIFY DEVICE results we will examine
1098 * @s: string into which data is output
1099 * @ofs: offset into identify device page
1100 * @len: length of string to return. must be an even number.
1101 *
1102 * The strings in the IDENTIFY DEVICE page are broken up into
1103 * 16-bit chunks. Run through the string, and output each
1104 * 8-bit chunk linearly, regardless of platform.
1105 *
1106 * LOCKING:
1107 * caller.
1108 */
1109
Tejun Heo6a62a042006-02-13 10:02:46 +09001110void ata_id_string(const u16 *id, unsigned char *s,
1111 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112{
1113 unsigned int c;
1114
Alan Cox963e4972008-07-24 17:16:06 +01001115 BUG_ON(len & 1);
1116
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 while (len > 0) {
1118 c = id[ofs] >> 8;
1119 *s = c;
1120 s++;
1121
1122 c = id[ofs] & 0xff;
1123 *s = c;
1124 s++;
1125
1126 ofs++;
1127 len -= 2;
1128 }
1129}
1130
Tejun Heo0e949ff2006-02-12 22:47:04 +09001131/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001132 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001133 * @id: IDENTIFY DEVICE results we will examine
1134 * @s: string into which data is output
1135 * @ofs: offset into identify device page
1136 * @len: length of string to return. must be an odd number.
1137 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001138 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001139 * trims trailing spaces and terminates the resulting string with
1140 * null. @len must be actual maximum length (even number) + 1.
1141 *
1142 * LOCKING:
1143 * caller.
1144 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001145void ata_id_c_string(const u16 *id, unsigned char *s,
1146 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001147{
1148 unsigned char *p;
1149
Tejun Heo6a62a042006-02-13 10:02:46 +09001150 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001151
1152 p = s + strnlen(s, len - 1);
1153 while (p > s && p[-1] == ' ')
1154 p--;
1155 *p = '\0';
1156}
Edward Falk0baab862005-06-02 18:17:13 -04001157
Tejun Heodb6f8752007-09-03 12:31:58 +09001158static u64 ata_id_n_sectors(const u16 *id)
1159{
1160 if (ata_id_has_lba(id)) {
1161 if (ata_id_has_lba48(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001162 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
Tejun Heodb6f8752007-09-03 12:31:58 +09001163 else
Robert Hancock968e5942009-02-16 20:15:08 -06001164 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
Tejun Heodb6f8752007-09-03 12:31:58 +09001165 } else {
1166 if (ata_id_current_chs_valid(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001167 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1168 id[ATA_ID_CUR_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001169 else
Robert Hancock968e5942009-02-16 20:15:08 -06001170 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1171 id[ATA_ID_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001172 }
1173}
1174
Tejun Heoa5987e02008-03-27 19:14:23 +09001175u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001176{
1177 u64 sectors = 0;
1178
1179 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1180 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
Roland Dreierba14a9c2008-10-28 16:52:20 -07001181 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
Alan Cox1e999732007-04-11 00:23:13 +01001182 sectors |= (tf->lbah & 0xff) << 16;
1183 sectors |= (tf->lbam & 0xff) << 8;
1184 sectors |= (tf->lbal & 0xff);
1185
Tejun Heoa5987e02008-03-27 19:14:23 +09001186 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001187}
1188
Tejun Heoa5987e02008-03-27 19:14:23 +09001189u64 ata_tf_to_lba(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001190{
1191 u64 sectors = 0;
1192
1193 sectors |= (tf->device & 0x0f) << 24;
1194 sectors |= (tf->lbah & 0xff) << 16;
1195 sectors |= (tf->lbam & 0xff) << 8;
1196 sectors |= (tf->lbal & 0xff);
1197
Tejun Heoa5987e02008-03-27 19:14:23 +09001198 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001199}
1200
1201/**
Tejun Heoc728a912007-09-03 12:32:30 +09001202 * ata_read_native_max_address - Read native max address
1203 * @dev: target device
1204 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001205 *
Tejun Heoc728a912007-09-03 12:32:30 +09001206 * Perform an LBA48 or LBA28 native size query upon the device in
1207 * question.
1208 *
1209 * RETURNS:
1210 * 0 on success, -EACCES if command is aborted by the drive.
1211 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001212 */
Tejun Heoc728a912007-09-03 12:32:30 +09001213static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001214{
Tejun Heoc728a912007-09-03 12:32:30 +09001215 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001216 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001217 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001218
1219 ata_tf_init(dev, &tf);
1220
Tejun Heoc728a912007-09-03 12:32:30 +09001221 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001222 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001223
1224 if (lba48) {
1225 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1226 tf.flags |= ATA_TFLAG_LBA48;
1227 } else
1228 tf.command = ATA_CMD_READ_NATIVE_MAX;
1229
Alan Cox1e999732007-04-11 00:23:13 +01001230 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001231 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001232
Tejun Heo2b789102007-10-09 15:05:44 +09001233 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001234 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001235 ata_dev_warn(dev,
1236 "failed to read native max address (err_mask=0x%x)\n",
1237 err_mask);
Tejun Heoc728a912007-09-03 12:32:30 +09001238 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1239 return -EACCES;
1240 return -EIO;
1241 }
Alan Cox1e999732007-04-11 00:23:13 +01001242
Tejun Heoc728a912007-09-03 12:32:30 +09001243 if (lba48)
Tejun Heoa5987e02008-03-27 19:14:23 +09001244 *max_sectors = ata_tf_to_lba48(&tf) + 1;
Tejun Heoc728a912007-09-03 12:32:30 +09001245 else
Tejun Heoa5987e02008-03-27 19:14:23 +09001246 *max_sectors = ata_tf_to_lba(&tf) + 1;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001247 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001248 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001249 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001250}
1251
1252/**
Tejun Heoc728a912007-09-03 12:32:30 +09001253 * ata_set_max_sectors - Set max sectors
1254 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001255 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001256 *
Tejun Heoc728a912007-09-03 12:32:30 +09001257 * Set max sectors of @dev to @new_sectors.
1258 *
1259 * RETURNS:
1260 * 0 on success, -EACCES if command is aborted or denied (due to
1261 * previous non-volatile SET_MAX) by the drive. -EIO on other
1262 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001263 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001264static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001265{
Tejun Heoc728a912007-09-03 12:32:30 +09001266 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001267 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001268 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001269
1270 new_sectors--;
1271
1272 ata_tf_init(dev, &tf);
1273
Alan Cox1e999732007-04-11 00:23:13 +01001274 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001275
1276 if (lba48) {
1277 tf.command = ATA_CMD_SET_MAX_EXT;
1278 tf.flags |= ATA_TFLAG_LBA48;
1279
1280 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1281 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1282 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001283 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001284 tf.command = ATA_CMD_SET_MAX;
1285
Tejun Heo1e582ba2007-09-21 20:07:14 +09001286 tf.device |= (new_sectors >> 24) & 0xf;
1287 }
1288
Alan Cox1e999732007-04-11 00:23:13 +01001289 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001290 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001291
1292 tf.lbal = (new_sectors >> 0) & 0xff;
1293 tf.lbam = (new_sectors >> 8) & 0xff;
1294 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001295
Tejun Heo2b789102007-10-09 15:05:44 +09001296 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001297 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001298 ata_dev_warn(dev,
1299 "failed to set max address (err_mask=0x%x)\n",
1300 err_mask);
Tejun Heoc728a912007-09-03 12:32:30 +09001301 if (err_mask == AC_ERR_DEV &&
1302 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1303 return -EACCES;
1304 return -EIO;
1305 }
Alan Cox1e999732007-04-11 00:23:13 +01001306
Tejun Heoc728a912007-09-03 12:32:30 +09001307 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001308}
1309
1310/**
1311 * ata_hpa_resize - Resize a device with an HPA set
1312 * @dev: Device to resize
1313 *
1314 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1315 * it if required to the full size of the media. The caller must check
1316 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001317 *
1318 * RETURNS:
1319 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001320 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001321static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001322{
Tejun Heo05027ad2007-09-03 12:32:57 +09001323 struct ata_eh_context *ehc = &dev->link->eh_context;
1324 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo445d2112010-04-05 10:33:13 +09001325 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
Tejun Heo05027ad2007-09-03 12:32:57 +09001326 u64 sectors = ata_id_n_sectors(dev->id);
1327 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001328 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001329
Tejun Heo05027ad2007-09-03 12:32:57 +09001330 /* do we need to do it? */
1331 if (dev->class != ATA_DEV_ATA ||
1332 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1333 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001334 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001335
Tejun Heo05027ad2007-09-03 12:32:57 +09001336 /* read native max address */
1337 rc = ata_read_native_max_address(dev, &native_sectors);
1338 if (rc) {
Tejun Heodda7aba2008-03-23 21:05:15 +09001339 /* If device aborted the command or HPA isn't going to
1340 * be unlocked, skip HPA resizing.
Tejun Heo05027ad2007-09-03 12:32:57 +09001341 */
Tejun Heo445d2112010-04-05 10:33:13 +09001342 if (rc == -EACCES || !unlock_hpa) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001343 ata_dev_warn(dev,
1344 "HPA support seems broken, skipping HPA handling\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001345 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001346
Tejun Heo05027ad2007-09-03 12:32:57 +09001347 /* we can continue if device aborted the command */
1348 if (rc == -EACCES)
1349 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001350 }
Tejun Heo37301a52007-06-25 20:45:54 +09001351
Tejun Heo05027ad2007-09-03 12:32:57 +09001352 return rc;
1353 }
Tejun Heo5920dad2009-07-15 17:11:41 +09001354 dev->n_native_sectors = native_sectors;
Tejun Heo05027ad2007-09-03 12:32:57 +09001355
1356 /* nothing to do? */
Tejun Heo445d2112010-04-05 10:33:13 +09001357 if (native_sectors <= sectors || !unlock_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001358 if (!print_info || native_sectors == sectors)
1359 return 0;
1360
1361 if (native_sectors > sectors)
Joe Perchesa9a79df2011-04-15 15:51:59 -07001362 ata_dev_info(dev,
Tejun Heo05027ad2007-09-03 12:32:57 +09001363 "HPA detected: current %llu, native %llu\n",
1364 (unsigned long long)sectors,
1365 (unsigned long long)native_sectors);
1366 else if (native_sectors < sectors)
Joe Perchesa9a79df2011-04-15 15:51:59 -07001367 ata_dev_warn(dev,
1368 "native sectors (%llu) is smaller than sectors (%llu)\n",
Tejun Heo05027ad2007-09-03 12:32:57 +09001369 (unsigned long long)native_sectors,
1370 (unsigned long long)sectors);
1371 return 0;
1372 }
1373
1374 /* let's unlock HPA */
1375 rc = ata_set_max_sectors(dev, native_sectors);
1376 if (rc == -EACCES) {
1377 /* if device aborted the command, skip HPA resizing */
Joe Perchesa9a79df2011-04-15 15:51:59 -07001378 ata_dev_warn(dev,
1379 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1380 (unsigned long long)sectors,
1381 (unsigned long long)native_sectors);
Tejun Heo05027ad2007-09-03 12:32:57 +09001382 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1383 return 0;
1384 } else if (rc)
1385 return rc;
1386
1387 /* re-read IDENTIFY data */
1388 rc = ata_dev_reread_id(dev, 0);
1389 if (rc) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001390 ata_dev_err(dev,
1391 "failed to re-read IDENTIFY data after HPA resizing\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001392 return rc;
1393 }
1394
1395 if (print_info) {
1396 u64 new_sectors = ata_id_n_sectors(dev->id);
Joe Perchesa9a79df2011-04-15 15:51:59 -07001397 ata_dev_info(dev,
Tejun Heo05027ad2007-09-03 12:32:57 +09001398 "HPA unlocked: %llu -> %llu, native %llu\n",
1399 (unsigned long long)sectors,
1400 (unsigned long long)new_sectors,
1401 (unsigned long long)native_sectors);
1402 }
1403
1404 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001405}
1406
Edward Falk0baab862005-06-02 18:17:13 -04001407/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001409 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001411 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1412 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 *
1414 * LOCKING:
1415 * caller.
1416 */
1417
Tejun Heo0bd33002006-02-12 22:47:05 +09001418static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419{
1420 DPRINTK("49==0x%04x "
1421 "53==0x%04x "
1422 "63==0x%04x "
1423 "64==0x%04x "
1424 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001425 id[49],
1426 id[53],
1427 id[63],
1428 id[64],
1429 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 DPRINTK("80==0x%04x "
1431 "81==0x%04x "
1432 "82==0x%04x "
1433 "83==0x%04x "
1434 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001435 id[80],
1436 id[81],
1437 id[82],
1438 id[83],
1439 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 DPRINTK("88==0x%04x "
1441 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001442 id[88],
1443 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444}
1445
Tejun Heocb95d562006-03-06 04:31:56 +09001446/**
1447 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1448 * @id: IDENTIFY data to compute xfer mask from
1449 *
1450 * Compute the xfermask for this device. This is not as trivial
1451 * as it seems if we must consider early devices correctly.
1452 *
1453 * FIXME: pre IDE drive timing (do we care ?).
1454 *
1455 * LOCKING:
1456 * None.
1457 *
1458 * RETURNS:
1459 * Computed xfermask
1460 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001461unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001462{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001463 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001464
1465 /* Usual case. Word 53 indicates word 64 is valid */
1466 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1467 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1468 pio_mask <<= 3;
1469 pio_mask |= 0x7;
1470 } else {
1471 /* If word 64 isn't valid then Word 51 high byte holds
1472 * the PIO timing number for the maximum. Turn it into
1473 * a mask.
1474 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001475 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001476 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001477 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001478 else
1479 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001480
1481 /* But wait.. there's more. Design your standards by
1482 * committee and you too can get a free iordy field to
1483 * process. However its the speeds not the modes that
1484 * are supported... Note drivers using the timing API
1485 * will get this right anyway
1486 */
1487 }
1488
1489 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001490
Alan Coxb352e572006-08-10 18:52:12 +01001491 if (ata_id_is_cfa(id)) {
1492 /*
1493 * Process compact flash extended modes
1494 */
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04001495 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1496 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
Alan Coxb352e572006-08-10 18:52:12 +01001497
1498 if (pio)
1499 pio_mask |= (1 << 5);
1500 if (pio > 1)
1501 pio_mask |= (1 << 6);
1502 if (dma)
1503 mwdma_mask |= (1 << 3);
1504 if (dma > 1)
1505 mwdma_mask |= (1 << 4);
1506 }
1507
Tejun Heofb21f0d2006-03-12 12:34:35 +09001508 udma_mask = 0;
1509 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1510 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001511
1512 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1513}
1514
Adrian Bunk7102d232007-01-04 00:09:36 +01001515static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001516{
Tejun Heo77853bf2006-01-23 13:09:36 +09001517 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001518
Tejun Heoa2a7a662005-12-13 14:48:31 +09001519 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001520}
1521
1522/**
Tejun Heo24326972006-11-14 22:47:09 +09001523 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001524 * @dev: Device to which the command is sent
1525 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001526 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001527 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001528 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001529 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001530 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001531 *
1532 * Executes libata internal command with timeout. @tf contains
1533 * command on entry and result on return. Timeout and error
1534 * conditions are reported via return value. No recovery action
1535 * is taken after a command times out. It's caller's duty to
1536 * clean up after timeout.
1537 *
1538 * LOCKING:
1539 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001540 *
1541 * RETURNS:
1542 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001543 */
Tejun Heo24326972006-11-14 22:47:09 +09001544unsigned ata_exec_internal_sg(struct ata_device *dev,
1545 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001546 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001547 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001548{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001549 struct ata_link *link = dev->link;
1550 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001551 u8 command = tf->command;
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001552 int auto_timeout = 0;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001553 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001554 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001555 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001556 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001557 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001558 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001559 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001560 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001561
Jeff Garzikba6a1302006-06-22 23:46:10 -04001562 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001563
Tejun Heoe3180492006-05-15 20:58:09 +09001564 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001565 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001566 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001567 return AC_ERR_SYSTEM;
1568 }
1569
Tejun Heo2ab7db12006-05-15 20:58:02 +09001570 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001571
Tejun Heo2ab7db12006-05-15 20:58:02 +09001572 /* XXX: Tag 0 is used for drivers with legacy EH as some
1573 * drivers choke if any other tag is given. This breaks
1574 * ata_tag_internal() test for those drivers. Don't use new
1575 * EH stuff without converting to it.
1576 */
1577 if (ap->ops->error_handler)
1578 tag = ATA_TAG_INTERNAL;
1579 else
1580 tag = 0;
1581
Tejun Heo8a8bc222008-11-10 14:48:21 +09001582 if (test_and_set_bit(tag, &ap->qc_allocated))
1583 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001584 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001585
1586 qc->tag = tag;
1587 qc->scsicmd = NULL;
1588 qc->ap = ap;
1589 qc->dev = dev;
1590 ata_qc_reinit(qc);
1591
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001592 preempted_tag = link->active_tag;
1593 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001594 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001595 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001596 link->active_tag = ATA_TAG_POISON;
1597 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001598 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001599 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001600
1601 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001602 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001603 if (cdb)
1604 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Vincent Pelletiere7714512013-05-18 18:44:04 +02001605
1606 /* some SATA bridges need us to indicate data xfer direction */
1607 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1608 dma_dir == DMA_FROM_DEVICE)
1609 qc->tf.feature |= ATAPI_DMADIR;
1610
Tejun Heoe61e0672006-05-15 20:57:40 +09001611 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001612 qc->dma_dir = dma_dir;
1613 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001614 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001615 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001616
Jens Axboe87260212007-10-16 11:14:12 +02001617 for_each_sg(sgl, sg, n_elem, i)
1618 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001619
Jens Axboe87260212007-10-16 11:14:12 +02001620 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001621 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001622 }
1623
Tejun Heo77853bf2006-01-23 13:09:36 +09001624 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001625 qc->complete_fn = ata_qc_complete_internal;
1626
Tejun Heo8e0e6942006-03-31 20:41:11 +09001627 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001628
Jeff Garzikba6a1302006-06-22 23:46:10 -04001629 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001630
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001631 if (!timeout) {
1632 if (ata_probe_timeout)
1633 timeout = ata_probe_timeout * 1000;
1634 else {
1635 timeout = ata_internal_cmd_timeout(dev, command);
1636 auto_timeout = 1;
1637 }
1638 }
Tejun Heo2b789102007-10-09 15:05:44 +09001639
Tejun Heoc0c362b2010-09-06 17:57:14 +02001640 if (ap->ops->error_handler)
1641 ata_eh_release(ap);
1642
Tejun Heo2b789102007-10-09 15:05:44 +09001643 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001644
Tejun Heoc0c362b2010-09-06 17:57:14 +02001645 if (ap->ops->error_handler)
1646 ata_eh_acquire(ap);
1647
Tejun Heoc4291372010-05-10 21:41:38 +02001648 ata_sff_flush_pio_task(ap);
Tejun Heod95a7172006-05-15 20:58:14 +09001649
1650 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001651 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001652
1653 /* We're racing with irq here. If we lose, the
1654 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001655 * twice. If we win, the port is frozen and will be
1656 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001657 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001658 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001659 qc->err_mask |= AC_ERR_TIMEOUT;
1660
1661 if (ap->ops->error_handler)
1662 ata_port_freeze(ap);
1663 else
1664 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001665
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001666 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07001667 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1668 command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001669 }
1670
Jeff Garzikba6a1302006-06-22 23:46:10 -04001671 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001672 }
1673
Tejun Heod95a7172006-05-15 20:58:14 +09001674 /* do post_internal_cmd */
1675 if (ap->ops->post_internal_cmd)
1676 ap->ops->post_internal_cmd(qc);
1677
Tejun Heoa51d6442007-03-20 15:24:11 +09001678 /* perform minimal error analysis */
1679 if (qc->flags & ATA_QCFLAG_FAILED) {
1680 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1681 qc->err_mask |= AC_ERR_DEV;
1682
1683 if (!qc->err_mask)
1684 qc->err_mask |= AC_ERR_OTHER;
1685
1686 if (qc->err_mask & ~AC_ERR_OTHER)
1687 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001688 }
1689
Tejun Heo15869302006-05-15 20:57:33 +09001690 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001691 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001692
Tejun Heoe61e0672006-05-15 20:57:40 +09001693 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001694 err_mask = qc->err_mask;
1695
1696 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001697 link->active_tag = preempted_tag;
1698 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001699 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001700 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001701
Jeff Garzikba6a1302006-06-22 23:46:10 -04001702 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001703
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001704 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1705 ata_internal_cmd_timed_out(dev, command);
1706
Tejun Heo77853bf2006-01-23 13:09:36 +09001707 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001708}
1709
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710/**
Tejun Heo33480a02006-12-12 02:15:31 +09001711 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001712 * @dev: Device to which the command is sent
1713 * @tf: Taskfile registers for the command and the result
1714 * @cdb: CDB for packet command
1715 * @dma_dir: Data tranfer direction of the command
1716 * @buf: Data buffer of the command
1717 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001718 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001719 *
1720 * Wrapper around ata_exec_internal_sg() which takes simple
1721 * buffer instead of sg list.
1722 *
1723 * LOCKING:
1724 * None. Should be called with kernel context, might sleep.
1725 *
1726 * RETURNS:
1727 * Zero on success, AC_ERR_* mask on failure
1728 */
1729unsigned ata_exec_internal(struct ata_device *dev,
1730 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001731 int dma_dir, void *buf, unsigned int buflen,
1732 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001733{
Tejun Heo33480a02006-12-12 02:15:31 +09001734 struct scatterlist *psg = NULL, sg;
1735 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001736
Tejun Heo33480a02006-12-12 02:15:31 +09001737 if (dma_dir != DMA_NONE) {
1738 WARN_ON(!buf);
1739 sg_init_one(&sg, buf, buflen);
1740 psg = &sg;
1741 n_elem++;
1742 }
Tejun Heo24326972006-11-14 22:47:09 +09001743
Tejun Heo2b789102007-10-09 15:05:44 +09001744 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1745 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001746}
1747
1748/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001749 * ata_do_simple_cmd - execute simple internal command
1750 * @dev: Device to which the command is sent
1751 * @cmd: Opcode to execute
1752 *
1753 * Execute a 'simple' command, that only consists of the opcode
1754 * 'cmd' itself, without filling any other registers
1755 *
1756 * LOCKING:
1757 * Kernel thread context (may sleep).
1758 *
1759 * RETURNS:
1760 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001761 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001762unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001763{
1764 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001765
1766 ata_tf_init(dev, &tf);
1767
1768 tf.command = cmd;
1769 tf.flags |= ATA_TFLAG_DEVICE;
1770 tf.protocol = ATA_PROT_NODATA;
1771
Tejun Heo2b789102007-10-09 15:05:44 +09001772 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001773}
1774
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001776 * ata_pio_need_iordy - check if iordy needed
1777 * @adev: ATA device
1778 *
1779 * Check if the current speed of the device requires IORDY. Used
1780 * by various controllers for chip configuration.
1781 */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001782unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1783{
Tejun Heo0d9e6652009-06-11 11:04:45 +09001784 /* Don't set IORDY if we're preparing for reset. IORDY may
1785 * lead to controller lock up on certain controllers if the
1786 * port is not occupied. See bko#11703 for details.
1787 */
1788 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1789 return 0;
1790 /* Controller doesn't support IORDY. Probably a pointless
1791 * check as the caller should know this.
1792 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001793 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001794 return 0;
David Daney5c18c4d2008-12-10 15:39:12 -08001795 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1796 if (ata_id_is_cfa(adev->id)
1797 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1798 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001799 /* PIO3 and higher it is mandatory */
1800 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001801 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001802 /* We turn it on when possible */
1803 if (ata_id_has_iordy(adev->id))
1804 return 1;
1805 return 0;
1806}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001807
Alan Cox432729f2007-03-08 23:22:59 +00001808/**
1809 * ata_pio_mask_no_iordy - Return the non IORDY mask
1810 * @adev: ATA device
1811 *
1812 * Compute the highest mode possible if we are not using iordy. Return
1813 * -1 if no iordy mode is available.
1814 */
Alan Cox432729f2007-03-08 23:22:59 +00001815static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1816{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001817 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001818 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001819 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001820 /* Is the speed faster than the drive allows non IORDY ? */
1821 if (pio) {
1822 /* This is cycle times not frequency - watch the logic! */
1823 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001824 return 3 << ATA_SHIFT_PIO;
1825 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001826 }
1827 }
Alan Cox432729f2007-03-08 23:22:59 +00001828 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001829}
1830
1831/**
Alan Cox963e4972008-07-24 17:16:06 +01001832 * ata_do_dev_read_id - default ID read method
1833 * @dev: device
1834 * @tf: proposed taskfile
1835 * @id: data buffer
1836 *
1837 * Issue the identify taskfile and hand back the buffer containing
1838 * identify data. For some RAID controllers and for pre ATA devices
1839 * this function is wrapped or replaced by the driver
1840 */
1841unsigned int ata_do_dev_read_id(struct ata_device *dev,
1842 struct ata_taskfile *tf, u16 *id)
1843{
1844 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1845 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1846}
1847
1848/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001849 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001850 * @dev: target device
1851 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001852 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001853 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001854 *
1855 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1856 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001857 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1858 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001859 *
Alan Cox50a99012007-08-08 14:27:00 +01001860 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001861 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01001862 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001863 * LOCKING:
1864 * Kernel thread context (may sleep)
1865 *
1866 * RETURNS:
1867 * 0 on success, -errno otherwise.
1868 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001869int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001870 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001871{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001872 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001873 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001874 struct ata_taskfile tf;
1875 unsigned int err_mask = 0;
1876 const char *reason;
Tejun Heo79b42ba2009-04-15 06:21:10 +09001877 bool is_semb = class == ATA_DEV_SEMB;
Tejun Heo54936f82007-05-11 14:35:29 +02001878 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09001879 int rc;
1880
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001881 if (ata_msg_ctl(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07001882 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001883
Alan Cox963e4972008-07-24 17:16:06 +01001884retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001885 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001886
1887 switch (class) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001888 case ATA_DEV_SEMB:
1889 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
Tejun Heo49016ac2006-02-21 02:12:11 +09001890 case ATA_DEV_ATA:
1891 tf.command = ATA_CMD_ID_ATA;
1892 break;
1893 case ATA_DEV_ATAPI:
1894 tf.command = ATA_CMD_ID_ATAPI;
1895 break;
1896 default:
1897 rc = -ENODEV;
1898 reason = "unsupported class";
1899 goto err_out;
1900 }
1901
1902 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001903
1904 /* Some devices choke if TF registers contain garbage. Make
1905 * sure those are properly initialized.
1906 */
1907 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1908
1909 /* Device presence detection is unreliable on some
1910 * controllers. Always poll IDENTIFY if available.
1911 */
1912 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001913
Alan Cox963e4972008-07-24 17:16:06 +01001914 if (ap->ops->read_id)
1915 err_mask = ap->ops->read_id(dev, &tf, id);
1916 else
1917 err_mask = ata_do_dev_read_id(dev, &tf, id);
1918
Tejun Heo49016ac2006-02-21 02:12:11 +09001919 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001920 if (err_mask & AC_ERR_NODEV_HINT) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001921 ata_dev_dbg(dev, "NODEV after polling detection\n");
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001922 return -ENOENT;
1923 }
1924
Tejun Heo79b42ba2009-04-15 06:21:10 +09001925 if (is_semb) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001926 ata_dev_info(dev,
1927 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
Tejun Heo79b42ba2009-04-15 06:21:10 +09001928 /* SEMB is not supported yet */
1929 *p_class = ATA_DEV_SEMB_UNSUP;
1930 return 0;
1931 }
1932
Tejun Heo1ffc1512008-03-23 15:16:53 +09001933 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1934 /* Device or controller might have reported
1935 * the wrong device class. Give a shot at the
1936 * other IDENTIFY if the current one is
1937 * aborted by the device.
1938 */
1939 if (may_fallback) {
1940 may_fallback = 0;
Tejun Heo54936f82007-05-11 14:35:29 +02001941
Tejun Heo1ffc1512008-03-23 15:16:53 +09001942 if (class == ATA_DEV_ATA)
1943 class = ATA_DEV_ATAPI;
1944 else
1945 class = ATA_DEV_ATA;
1946 goto retry;
1947 }
1948
1949 /* Control reaches here iff the device aborted
1950 * both flavors of IDENTIFYs which happens
1951 * sometimes with phantom devices.
1952 */
Joe Perchesa9a79df2011-04-15 15:51:59 -07001953 ata_dev_dbg(dev,
1954 "both IDENTIFYs aborted, assuming NODEV\n");
Tejun Heo1ffc1512008-03-23 15:16:53 +09001955 return -ENOENT;
Tejun Heo54936f82007-05-11 14:35:29 +02001956 }
1957
Tejun Heo49016ac2006-02-21 02:12:11 +09001958 rc = -EIO;
1959 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001960 goto err_out;
1961 }
1962
Tejun Heo43c9c592010-05-23 12:59:11 +02001963 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001964 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1965 "class=%d may_fallback=%d tried_spinup=%d\n",
1966 class, may_fallback, tried_spinup);
Tejun Heo43c9c592010-05-23 12:59:11 +02001967 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1968 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1969 }
1970
Tejun Heo54936f82007-05-11 14:35:29 +02001971 /* Falling back doesn't make sense if ID data was read
1972 * successfully at least once.
1973 */
1974 may_fallback = 0;
1975
Tejun Heo49016ac2006-02-21 02:12:11 +09001976 swap_buf_le16(id, ATA_ID_WORDS);
1977
Tejun Heo49016ac2006-02-21 02:12:11 +09001978 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001979 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01001980 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07001981
1982 if (class == ATA_DEV_ATA) {
1983 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1984 goto err_out;
Andy Whitcroftdb63a4c2012-05-04 22:15:10 +01001985 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1986 ata_id_is_ata(id)) {
1987 ata_dev_dbg(dev,
1988 "host indicates ignore ATA devices, ignored\n");
1989 return -ENOENT;
1990 }
Tejun Heoa4f57492006-09-12 20:35:49 -07001991 } else {
1992 if (ata_id_is_ata(id))
1993 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001994 }
1995
Mark Lord169439c2007-04-17 18:26:07 -04001996 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1997 tried_spinup = 1;
1998 /*
1999 * Drive powered-up in standby mode, and requires a specific
2000 * SET_FEATURES spin-up subcommand before it will accept
2001 * anything other than the original IDENTIFY command.
2002 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002003 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07002004 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04002005 rc = -EIO;
2006 reason = "SPINUP failed";
2007 goto err_out;
2008 }
2009 /*
2010 * If the drive initially returned incomplete IDENTIFY info,
2011 * we now must reissue the IDENTIFY command.
2012 */
2013 if (id[2] == 0x37c8)
2014 goto retry;
2015 }
2016
Tejun Heobff04642006-11-10 18:08:10 +09002017 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09002018 /*
2019 * The exact sequence expected by certain pre-ATA4 drives is:
2020 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01002021 * IDENTIFY (optional in early ATA)
2022 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09002023 * anything else..
2024 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01002025 *
2026 * Note that ATA4 says lba is mandatory so the second check
Adam Buchbinderc9404c92009-12-18 15:40:42 -05002027 * should never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09002028 */
2029 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09002030 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09002031 if (err_mask) {
2032 rc = -EIO;
2033 reason = "INIT_DEV_PARAMS failed";
2034 goto err_out;
2035 }
2036
2037 /* current CHS translation info (id[53-58]) might be
2038 * changed. reread the identify device info.
2039 */
Tejun Heobff04642006-11-10 18:08:10 +09002040 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09002041 goto retry;
2042 }
2043 }
2044
2045 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09002046
Tejun Heo49016ac2006-02-21 02:12:11 +09002047 return 0;
2048
2049 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09002050 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002051 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2052 reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002053 return rc;
2054}
2055
Tejun Heo90627122009-01-29 20:31:36 +09002056static int ata_do_link_spd_horkage(struct ata_device *dev)
2057{
2058 struct ata_link *plink = ata_dev_phys_link(dev);
2059 u32 target, target_limit;
2060
2061 if (!sata_scr_valid(plink))
2062 return 0;
2063
2064 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2065 target = 1;
2066 else
2067 return 0;
2068
2069 target_limit = (1 << target) - 1;
2070
2071 /* if already on stricter limit, no need to push further */
2072 if (plink->sata_spd_limit <= target_limit)
2073 return 0;
2074
2075 plink->sata_spd_limit = target_limit;
2076
2077 /* Request another EH round by returning -EAGAIN if link is
2078 * going faster than the target speed. Forward progress is
2079 * guaranteed by setting sata_spd_limit to target_limit above.
2080 */
2081 if (plink->sata_spd > target) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002082 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2083 sata_spd_string(target));
Tejun Heo90627122009-01-29 20:31:36 +09002084 return -EAGAIN;
2085 }
2086 return 0;
2087}
2088
Tejun Heo3373efd2006-05-15 20:57:53 +09002089static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002090{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002091 struct ata_port *ap = dev->link->ap;
Jens Axboe9ce8e302008-08-27 15:23:18 +02002092
2093 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2094 return 0;
2095
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002096 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002097}
2098
Shaohua Li388539f2009-07-27 09:24:35 +08002099static int ata_dev_config_ncq(struct ata_device *dev,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002100 char *desc, size_t desc_sz)
2101{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002102 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002103 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
Shaohua Li388539f2009-07-27 09:24:35 +08002104 unsigned int err_mask;
2105 char *aa_desc = "";
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002106
2107 if (!ata_id_has_ncq(dev->id)) {
2108 desc[0] = '\0';
Shaohua Li388539f2009-07-27 09:24:35 +08002109 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002110 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002111 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002112 snprintf(desc, desc_sz, "NCQ (not used)");
Shaohua Li388539f2009-07-27 09:24:35 +08002113 return 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07002114 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002115 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002116 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002117 dev->flags |= ATA_DFLAG_NCQ;
2118 }
2119
Shaohua Li388539f2009-07-27 09:24:35 +08002120 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2121 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2122 ata_id_has_fpdma_aa(dev->id)) {
2123 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2124 SATA_FPDMA_AA);
2125 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002126 ata_dev_err(dev,
2127 "failed to enable AA (error_mask=0x%x)\n",
2128 err_mask);
Shaohua Li388539f2009-07-27 09:24:35 +08002129 if (err_mask != AC_ERR_DEV) {
2130 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2131 return -EIO;
2132 }
2133 } else
2134 aa_desc = ", AA";
2135 }
2136
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002137 if (hdepth >= ddepth)
Shaohua Li388539f2009-07-27 09:24:35 +08002138 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002139 else
Shaohua Li388539f2009-07-27 09:24:35 +08002140 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2141 ddepth, aa_desc);
Marc Carinoed369112013-08-24 23:22:50 -07002142
2143 if ((ap->flags & ATA_FLAG_FPDMA_AUX) &&
2144 ata_id_has_ncq_send_and_recv(dev->id)) {
2145 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2146 0, ap->sector_buf, 1);
2147 if (err_mask) {
2148 ata_dev_dbg(dev,
2149 "failed to get NCQ Send/Recv Log Emask 0x%x\n",
2150 err_mask);
2151 } else {
Marc Carinof78dea02013-12-16 18:15:53 -08002152 u8 *cmds = dev->ncq_send_recv_cmds;
2153
Marc Carinoed369112013-08-24 23:22:50 -07002154 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
Marc Carinof78dea02013-12-16 18:15:53 -08002155 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2156
2157 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2158 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2159 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2160 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2161 }
Marc Carinoed369112013-08-24 23:22:50 -07002162 }
2163 }
2164
Shaohua Li388539f2009-07-27 09:24:35 +08002165 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002166}
2167
Tejun Heo49016ac2006-02-21 02:12:11 +09002168/**
Tejun Heoffeae412006-03-01 16:09:35 +09002169 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002170 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 *
Tejun Heoffeae412006-03-01 16:09:35 +09002172 * Configure @dev according to @dev->id. Generic and low-level
2173 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174 *
2175 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002176 * Kernel thread context (may sleep)
2177 *
2178 * RETURNS:
2179 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002181int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002183 struct ata_port *ap = dev->link->ap;
2184 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002185 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002186 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002187 unsigned long xfer_mask;
Shane Huang65fe1f02012-09-07 22:40:01 +08002188 unsigned int err_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002189 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002190 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2191 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002192 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002194 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002195 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002196 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197 }
2198
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002199 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002200 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201
Tejun Heo75683fe2007-07-05 13:31:27 +09002202 /* set horkage */
2203 dev->horkage |= ata_dev_blacklisted(dev);
Tejun Heo33267322008-02-13 09:15:09 +09002204 ata_force_horkage(dev);
Tejun Heo75683fe2007-07-05 13:31:27 +09002205
Tejun Heo50af2fa2008-05-19 01:15:14 +09002206 if (dev->horkage & ATA_HORKAGE_DISABLE) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002207 ata_dev_info(dev, "unsupported device, disabling\n");
Tejun Heo50af2fa2008-05-19 01:15:14 +09002208 ata_dev_disable(dev);
2209 return 0;
2210 }
2211
Tejun Heo2486fa52008-07-31 07:52:40 +09002212 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2213 dev->class == ATA_DEV_ATAPI) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002214 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2215 atapi_enabled ? "not supported with this driver"
2216 : "disabled");
Tejun Heo2486fa52008-07-31 07:52:40 +09002217 ata_dev_disable(dev);
2218 return 0;
2219 }
2220
Tejun Heo90627122009-01-29 20:31:36 +09002221 rc = ata_do_link_spd_horkage(dev);
2222 if (rc)
2223 return rc;
2224
Tejun Heoecd75ad2014-01-16 09:47:17 -05002225 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2226 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2227 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2228 dev->horkage |= ATA_HORKAGE_NOLPM;
2229
2230 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2231 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2232 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2233 }
2234
Tejun Heo67465442007-05-15 03:28:16 +09002235 /* let ACPI work its magic */
2236 rc = ata_acpi_on_devcfg(dev);
2237 if (rc)
2238 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002239
Tejun Heo05027ad2007-09-03 12:32:57 +09002240 /* massage HPA, do it early as it might change IDENTIFY data */
2241 rc = ata_hpa_resize(dev);
2242 if (rc)
2243 return rc;
2244
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002245 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002246 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002247 ata_dev_dbg(dev,
2248 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2249 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2250 __func__,
2251 id[49], id[82], id[83], id[84],
2252 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002253
Tejun Heo208a9932006-03-05 17:55:58 +09002254 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002255 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002256 dev->max_sectors = 0;
2257 dev->cdb_len = 0;
2258 dev->n_sectors = 0;
2259 dev->cylinders = 0;
2260 dev->heads = 0;
2261 dev->sectors = 0;
Mark Lorde18086d2009-03-19 13:32:21 -04002262 dev->multi_count = 0;
Tejun Heo208a9932006-03-05 17:55:58 +09002263
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264 /*
2265 * common ATA, ATAPI feature tests
2266 */
2267
Tejun Heoff8854b2006-03-06 04:31:56 +09002268 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002269 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002271 if (ata_msg_probe(ap))
2272 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273
Albert Leeef143d52007-06-05 13:01:33 +08002274 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2275 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2276 sizeof(fwrevbuf));
2277
2278 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2279 sizeof(modelbuf));
2280
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 /* ATA-specific feature tests */
2282 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002283 if (ata_id_is_cfa(id)) {
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04002284 /* CPRM may make this media unusable */
2285 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002286 ata_dev_warn(dev,
2287 "supports DRM functions and may not be fully accessible\n");
Alan Coxb352e572006-08-10 18:52:12 +01002288 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002289 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002290 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002291 /* Warn the user if the device has TPM extensions */
2292 if (ata_id_has_tpm(id))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002293 ata_dev_warn(dev,
2294 "supports DRM functions and may not be fully accessible\n");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002295 }
Alan Coxb352e572006-08-10 18:52:12 +01002296
Tejun Heo1148c3a2006-03-13 19:48:04 +09002297 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002298
Mark Lorde18086d2009-03-19 13:32:21 -04002299 /* get current R/W Multiple count setting */
2300 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2301 unsigned int max = dev->id[47] & 0xff;
2302 unsigned int cnt = dev->id[59] & 0xff;
2303 /* only recognize/allow powers of two here */
2304 if (is_power_of_2(max) && is_power_of_2(cnt))
2305 if (cnt <= max)
2306 dev->multi_count = cnt;
2307 }
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002308
Tejun Heo1148c3a2006-03-13 19:48:04 +09002309 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002310 const char *lba_desc;
Shaohua Li388539f2009-07-27 09:24:35 +08002311 char ncq_desc[24];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002312
Tejun Heo4c2d7212006-03-05 17:55:58 +09002313 lba_desc = "LBA";
2314 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002315 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002316 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002317 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002318
2319 if (dev->n_sectors >= (1UL << 28) &&
2320 ata_id_has_flush_ext(id))
2321 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002322 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04002323
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002324 /* config NCQ */
Shaohua Li388539f2009-07-27 09:24:35 +08002325 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2326 if (rc)
2327 return rc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002328
Albert Lee8bf62ece2005-05-12 15:29:42 -04002329 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002330 if (ata_msg_drv(ap) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002331 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2332 revbuf, modelbuf, fwrevbuf,
2333 ata_mode_string(xfer_mask));
2334 ata_dev_info(dev,
2335 "%llu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002336 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002337 dev->multi_count, lba_desc, ncq_desc);
2338 }
Tejun Heoffeae412006-03-01 16:09:35 +09002339 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002340 /* CHS */
2341
2342 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002343 dev->cylinders = id[1];
2344 dev->heads = id[3];
2345 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002346
Tejun Heo1148c3a2006-03-13 19:48:04 +09002347 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002348 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002349 dev->cylinders = id[54];
2350 dev->heads = id[55];
2351 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002352 }
2353
2354 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002355 if (ata_msg_drv(ap) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002356 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2357 revbuf, modelbuf, fwrevbuf,
2358 ata_mode_string(xfer_mask));
2359 ata_dev_info(dev,
2360 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2361 (unsigned long long)dev->n_sectors,
2362 dev->multi_count, dev->cylinders,
2363 dev->heads, dev->sectors);
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002364 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002365 }
2366
Shane Huang803739d2012-12-17 23:18:59 +08002367 /* Check and mark DevSlp capability. Get DevSlp timing variables
2368 * from SATA Settings page of Identify Device Data Log.
Shane Huang65fe1f02012-09-07 22:40:01 +08002369 */
Shane Huang803739d2012-12-17 23:18:59 +08002370 if (ata_id_has_devslp(dev->id)) {
David Woodhouse8e725c72013-03-29 11:54:55 +00002371 u8 *sata_setting = ap->sector_buf;
Shane Huang803739d2012-12-17 23:18:59 +08002372 int i, j;
2373
2374 dev->flags |= ATA_DFLAG_DEVSLP;
Shane Huang65fe1f02012-09-07 22:40:01 +08002375 err_mask = ata_read_log_page(dev,
2376 ATA_LOG_SATA_ID_DEV_DATA,
2377 ATA_LOG_SATA_SETTINGS,
Shane Huang803739d2012-12-17 23:18:59 +08002378 sata_setting,
Shane Huang65fe1f02012-09-07 22:40:01 +08002379 1);
2380 if (err_mask)
2381 ata_dev_dbg(dev,
2382 "failed to get Identify Device Data, Emask 0x%x\n",
2383 err_mask);
Shane Huang803739d2012-12-17 23:18:59 +08002384 else
2385 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2386 j = ATA_LOG_DEVSLP_OFFSET + i;
2387 dev->devslp_timing[i] = sata_setting[j];
2388 }
Shane Huang65fe1f02012-09-07 22:40:01 +08002389 }
2390
Tejun Heo6e7846e2006-02-12 23:32:58 +09002391 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 }
2393
2394 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002395 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002396 const char *cdb_intr_string = "";
2397 const char *atapi_an_string = "";
Tejun Heo91163002008-02-21 13:25:50 +09002398 const char *dma_dir_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002399 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002400
Tejun Heo1148c3a2006-03-13 19:48:04 +09002401 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002403 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002404 ata_dev_warn(dev, "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002405 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 goto err_out_nosup;
2407 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002408 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
Tejun Heo7d77b242007-09-23 13:14:13 +09002410 /* Enable ATAPI AN if both the host and device have
2411 * the support. If PMP is attached, SNTF is required
2412 * to enable ATAPI AN to discern between PHY status
2413 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002414 */
Tejun Heoe7ecd432010-05-19 15:38:58 +02002415 if (atapi_an &&
2416 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
Tejun Heo071f44b2008-04-07 22:47:22 +09002417 (!sata_pmp_attached(ap) ||
Tejun Heo7d77b242007-09-23 13:14:13 +09002418 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002419 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002420 err_mask = ata_dev_set_feature(dev,
2421 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002422 if (err_mask)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002423 ata_dev_err(dev,
2424 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2425 err_mask);
Tejun Heo854c73a2007-09-23 13:14:11 +09002426 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002427 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002428 atapi_an_string = ", ATAPI AN";
2429 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002430 }
2431
Albert Lee08a556d2006-03-31 13:29:04 +08002432 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002433 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002434 cdb_intr_string = ", CDB intr";
2435 }
Albert Lee312f7da2005-09-27 17:38:03 +08002436
Vincent Pelletier966fbe12013-05-21 22:30:58 +02002437 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
Tejun Heo91163002008-02-21 13:25:50 +09002438 dev->flags |= ATA_DFLAG_DMADIR;
2439 dma_dir_string = ", DMADIR";
2440 }
2441
Aaron Luafe75952013-01-15 17:20:58 +08002442 if (ata_id_has_da(dev->id)) {
Lin Mingb1354cb2012-06-25 16:13:08 +08002443 dev->flags |= ATA_DFLAG_DA;
Aaron Luafe75952013-01-15 17:20:58 +08002444 zpodd_init(dev);
2445 }
Lin Mingb1354cb2012-06-25 16:13:08 +08002446
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002448 if (ata_msg_drv(ap) && print_info)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002449 ata_dev_info(dev,
2450 "ATAPI: %s, %s, max %s%s%s%s\n",
2451 modelbuf, fwrevbuf,
2452 ata_mode_string(xfer_mask),
2453 cdb_intr_string, atapi_an_string,
2454 dma_dir_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 }
2456
Tejun Heo914ed352006-11-01 18:39:55 +09002457 /* determine max_sectors */
2458 dev->max_sectors = ATA_MAX_SECTORS;
2459 if (dev->flags & ATA_DFLAG_LBA48)
2460 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2461
Alan Coxc5038fc2007-10-25 14:21:16 +01002462 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2463 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002464 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002465 if (ata_msg_drv(ap) && print_info)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002466 ata_dev_info(dev, "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002467 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002468 dev->max_sectors = ATA_MAX_SECTORS;
2469 }
2470
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002471 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002472 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002473 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002474 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2475 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002476
Tejun Heo75683fe2007-07-05 13:31:27 +09002477 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002478 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2479 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002480
Shan Haia32450e2013-03-18 10:30:44 +08002481 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2482 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2483
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002484 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002485 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002486
Alan Coxc5038fc2007-10-25 14:21:16 +01002487 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2488 /* Let the user know. We don't want to disallow opens for
2489 rescue purposes, or in case the vendor is just a blithering
2490 idiot. Do this after the dev_config call as some controllers
2491 with buggy firmware may want to avoid reporting false device
2492 bugs */
2493
2494 if (print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002495 ata_dev_warn(dev,
Alan Coxc5038fc2007-10-25 14:21:16 +01002496"Drive reports diagnostics failure. This may indicate a drive\n");
Joe Perchesa9a79df2011-04-15 15:51:59 -07002497 ata_dev_warn(dev,
Alan Coxc5038fc2007-10-25 14:21:16 +01002498"fault or invalid emulation. Contact drive vendor for information.\n");
2499 }
2500 }
2501
Tejun Heoac70a962008-11-27 13:36:48 +09002502 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002503 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2504 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
Tejun Heoac70a962008-11-27 13:36:48 +09002505 }
2506
Tejun Heoffeae412006-03-01 16:09:35 +09002507 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508
2509err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002510 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002511 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002512 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513}
2514
2515/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002516 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002517 * @ap: port
2518 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002519 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002520 * detection.
2521 */
2522
2523int ata_cable_40wire(struct ata_port *ap)
2524{
2525 return ATA_CBL_PATA40;
2526}
2527
2528/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002529 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002530 * @ap: port
2531 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002532 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002533 * detection.
2534 */
2535
2536int ata_cable_80wire(struct ata_port *ap)
2537{
2538 return ATA_CBL_PATA80;
2539}
2540
2541/**
2542 * ata_cable_unknown - return unknown PATA cable.
2543 * @ap: port
2544 *
2545 * Helper method for drivers which have no PATA cable detection.
2546 */
2547
2548int ata_cable_unknown(struct ata_port *ap)
2549{
2550 return ATA_CBL_PATA_UNK;
2551}
2552
2553/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002554 * ata_cable_ignore - return ignored PATA cable.
2555 * @ap: port
2556 *
2557 * Helper method for drivers which don't use cable type to limit
2558 * transfer mode.
2559 */
2560int ata_cable_ignore(struct ata_port *ap)
2561{
2562 return ATA_CBL_PATA_IGN;
2563}
2564
2565/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002566 * ata_cable_sata - return SATA cable type
2567 * @ap: port
2568 *
2569 * Helper method for drivers which have SATA cables
2570 */
2571
2572int ata_cable_sata(struct ata_port *ap)
2573{
2574 return ATA_CBL_SATA;
2575}
2576
2577/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578 * ata_bus_probe - Reset and probe ATA bus
2579 * @ap: Bus to probe
2580 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002581 * Master ATA bus probing function. Initiates a hardware-dependent
2582 * bus reset, then attempts to identify any devices found on
2583 * the bus.
2584 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002585 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002586 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587 *
2588 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002589 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002590 */
2591
Brian King80289162006-08-07 14:27:31 -05002592int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002594 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002595 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002596 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002597 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598
Tejun Heo1eca4362008-11-03 20:03:17 +09002599 ata_for_each_dev(dev, &ap->link, ALL)
Tejun Heof58229f2007-08-06 18:36:23 +09002600 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002601
2602 retry:
Tejun Heo1eca4362008-11-03 20:03:17 +09002603 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heocdeab112007-10-29 16:41:09 +09002604 /* If we issue an SRST then an ATA drive (not ATAPI)
2605 * may change configuration and be in PIO0 timing. If
2606 * we do a hard reset (or are coming from power on)
2607 * this is true for ATA or ATAPI. Until we've set a
2608 * suitable controller mode we should not touch the
2609 * bus as we may be talking too fast.
2610 */
2611 dev->pio_mode = XFER_PIO_0;
Aaron Lu54169122012-12-03 11:35:02 +08002612 dev->dma_mode = 0xff;
Tejun Heocdeab112007-10-29 16:41:09 +09002613
2614 /* If the controller has a pio mode setup function
2615 * then use it to set the chipset to rights. Don't
2616 * touch the DMA setup as that will be dealt with when
2617 * configuring devices.
2618 */
2619 if (ap->ops->set_piomode)
2620 ap->ops->set_piomode(ap, dev);
2621 }
2622
Tejun Heo20444702006-03-13 01:57:01 +09002623 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002624 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002625
Tejun Heo1eca4362008-11-03 20:03:17 +09002626 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo3e4ec342010-05-10 21:41:30 +02002627 if (dev->class != ATA_DEV_UNKNOWN)
Tejun Heo52783c52006-05-31 18:28:22 +09002628 classes[dev->devno] = dev->class;
2629 else
2630 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002631
Tejun Heo52783c52006-05-31 18:28:22 +09002632 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002633 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002635 /* read IDENTIFY page and configure devices. We have to do the identify
2636 specific sequence bass-ackwards so that PDIAG- is released by
2637 the slave device */
2638
Tejun Heo1eca4362008-11-03 20:03:17 +09002639 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
Tejun Heof58229f2007-08-06 18:36:23 +09002640 if (tries[dev->devno])
2641 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002642
Tejun Heoe1211e32006-04-01 01:38:18 +09002643 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002644 continue;
2645
Tejun Heobff04642006-11-10 18:08:10 +09002646 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2647 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002648 if (rc)
2649 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002650 }
2651
Alan Coxbe0d18d2007-03-06 02:37:56 -08002652 /* Now ask for the cable type as PDIAG- should have been released */
2653 if (ap->ops->cable_detect)
2654 ap->cbl = ap->ops->cable_detect(ap);
2655
Tejun Heo1eca4362008-11-03 20:03:17 +09002656 /* We may have SATA bridge glue hiding here irrespective of
2657 * the reported cable types and sensed types. When SATA
2658 * drives indicate we have a bridge, we don't know which end
2659 * of the link the bridge is which is a problem.
2660 */
2661 ata_for_each_dev(dev, &ap->link, ENABLED)
Alan Cox614fe292007-08-22 23:22:45 +01002662 if (ata_id_is_sata(dev->id))
2663 ap->cbl = ATA_CBL_SATA;
Alan Cox614fe292007-08-22 23:22:45 +01002664
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002665 /* After the identify sequence we can now set up the devices. We do
2666 this in the normal order so that the user doesn't get confused */
2667
Tejun Heo1eca4362008-11-03 20:03:17 +09002668 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002669 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002670 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002671 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002672 if (rc)
2673 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 }
2675
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002676 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002677 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002678 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002679 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002680
Tejun Heo1eca4362008-11-03 20:03:17 +09002681 ata_for_each_dev(dev, &ap->link, ENABLED)
2682 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002683
Tejun Heo96072e62006-04-01 01:38:17 +09002684 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002685
2686 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002687 tries[dev->devno]--;
2688
Tejun Heo14d2bac2006-04-02 17:54:46 +09002689 switch (rc) {
2690 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002691 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002692 tries[dev->devno] = 0;
2693 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002694
2695 case -ENODEV:
2696 /* give it just one more chance */
2697 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002698 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002699 if (tries[dev->devno] == 1) {
2700 /* This is the last chance, better to slow
2701 * down than lose it.
2702 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002703 sata_down_spd_limit(&ap->link, 0);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002704 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2705 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002706 }
2707
Tejun Heo4ae72a12007-02-02 16:22:30 +09002708 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002709 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002710
Tejun Heo14d2bac2006-04-02 17:54:46 +09002711 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712}
2713
2714/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002715 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002716 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002717 *
2718 * This function prints link speed and status of a SATA link.
2719 *
2720 * LOCKING:
2721 * None.
2722 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002723static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002724{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002725 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002726
Tejun Heo936fd732007-08-06 18:36:23 +09002727 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002728 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002729 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002730
Tejun Heob1c72912008-07-31 17:02:43 +09002731 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002732 tmp = (sstatus >> 4) & 0xf;
Joe Perchesa9a79df2011-04-15 15:51:59 -07002733 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2734 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002735 } else {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002736 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2737 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002738 }
2739}
2740
2741/**
Alan Coxebdfca62006-03-23 15:38:34 +00002742 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002743 * @adev: device
2744 *
2745 * Obtain the other device on the same cable, or if none is
2746 * present NULL is returned
2747 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002748
Tejun Heo3373efd2006-05-15 20:57:53 +09002749struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002750{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002751 struct ata_link *link = adev->link;
2752 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002753 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002754 return NULL;
2755 return pair;
2756}
2757
2758/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002759 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002760 * @link: Link to adjust SATA spd limit for
Tejun Heoa07d4992009-01-29 20:31:33 +09002761 * @spd_limit: Additional limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09002762 *
Tejun Heo936fd732007-08-06 18:36:23 +09002763 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002764 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002765 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002766 *
Tejun Heoa07d4992009-01-29 20:31:33 +09002767 * If @spd_limit is non-zero, the speed is limited to equal to or
2768 * lower than @spd_limit if such speed is supported. If
2769 * @spd_limit is slower than any supported speed, only the lowest
2770 * supported speed is allowed.
2771 *
Tejun Heo1c3fae42006-04-02 20:53:28 +09002772 * LOCKING:
2773 * Inherited from caller.
2774 *
2775 * RETURNS:
2776 * 0 on success, negative errno on failure
2777 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002778int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002779{
Tejun Heo81952c52006-05-15 20:57:47 +09002780 u32 sstatus, spd, mask;
Tejun Heoa07d4992009-01-29 20:31:33 +09002781 int rc, bit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002782
Tejun Heo936fd732007-08-06 18:36:23 +09002783 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002784 return -EOPNOTSUPP;
2785
2786 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002787 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002788 */
Tejun Heo936fd732007-08-06 18:36:23 +09002789 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo9913ff82009-01-29 20:31:31 +09002790 if (rc == 0 && ata_sstatus_online(sstatus))
Tejun Heo008a7892007-07-16 14:29:40 +09002791 spd = (sstatus >> 4) & 0xf;
2792 else
Tejun Heo936fd732007-08-06 18:36:23 +09002793 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002794
Tejun Heo936fd732007-08-06 18:36:23 +09002795 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002796 if (mask <= 1)
2797 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002798
2799 /* unconditionally mask off the highest bit */
Tejun Heoa07d4992009-01-29 20:31:33 +09002800 bit = fls(mask) - 1;
2801 mask &= ~(1 << bit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002802
Tejun Heo008a7892007-07-16 14:29:40 +09002803 /* Mask off all speeds higher than or equal to the current
2804 * one. Force 1.5Gbps if current SPD is not available.
2805 */
2806 if (spd > 1)
2807 mask &= (1 << (spd - 1)) - 1;
2808 else
2809 mask &= 1;
2810
2811 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002812 if (!mask)
2813 return -EINVAL;
2814
Tejun Heoa07d4992009-01-29 20:31:33 +09002815 if (spd_limit) {
2816 if (mask & ((1 << spd_limit) - 1))
2817 mask &= (1 << spd_limit) - 1;
2818 else {
2819 bit = ffs(mask) - 1;
2820 mask = 1 << bit;
2821 }
2822 }
2823
Tejun Heo936fd732007-08-06 18:36:23 +09002824 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002825
Joe Perchesa9a79df2011-04-15 15:51:59 -07002826 ata_link_warn(link, "limiting SATA link speed to %s\n",
2827 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002828
2829 return 0;
2830}
2831
Tejun Heo936fd732007-08-06 18:36:23 +09002832static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002833{
Tejun Heo52702222007-10-31 10:17:07 +09002834 struct ata_link *host_link = &link->ap->link;
2835 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002836
Tejun Heo52702222007-10-31 10:17:07 +09002837 limit = link->sata_spd_limit;
2838
2839 /* Don't configure downstream link faster than upstream link.
2840 * It doesn't speed up anything and some PMPs choke on such
2841 * configuration.
2842 */
2843 if (!ata_is_host_link(link) && host_link->sata_spd)
2844 limit &= (1 << host_link->sata_spd) - 1;
2845
2846 if (limit == UINT_MAX)
2847 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002848 else
Tejun Heo52702222007-10-31 10:17:07 +09002849 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002850
2851 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002852 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002853
Tejun Heo52702222007-10-31 10:17:07 +09002854 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002855}
2856
2857/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002858 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002859 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002860 *
2861 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002862 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002863 * whether hardreset is necessary to apply SATA spd
2864 * configuration.
2865 *
2866 * LOCKING:
2867 * Inherited from caller.
2868 *
2869 * RETURNS:
2870 * 1 if SATA spd configuration is needed, 0 otherwise.
2871 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03002872static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002873{
2874 u32 scontrol;
2875
Tejun Heo936fd732007-08-06 18:36:23 +09002876 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002877 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002878
Tejun Heo936fd732007-08-06 18:36:23 +09002879 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002880}
2881
2882/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002883 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002884 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002885 *
Tejun Heo936fd732007-08-06 18:36:23 +09002886 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002887 *
2888 * LOCKING:
2889 * Inherited from caller.
2890 *
2891 * RETURNS:
2892 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002893 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002894 */
Tejun Heo936fd732007-08-06 18:36:23 +09002895int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002896{
2897 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002898 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002899
Tejun Heo936fd732007-08-06 18:36:23 +09002900 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002901 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002902
Tejun Heo936fd732007-08-06 18:36:23 +09002903 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002904 return 0;
2905
Tejun Heo936fd732007-08-06 18:36:23 +09002906 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002907 return rc;
2908
Tejun Heo1c3fae42006-04-02 20:53:28 +09002909 return 1;
2910}
2911
Alan Cox452503f2005-10-21 19:01:32 -04002912/*
2913 * This mode timing computation functionality is ported over from
2914 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2915 */
2916/*
Alan Coxb352e572006-08-10 18:52:12 +01002917 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002918 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002919 * for UDMA6, which is currently supported only by Maxtor drives.
2920 *
2921 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002922 */
2923
2924static const struct ata_timing ata_timing[] = {
David Daney3ada9c12009-01-15 17:45:31 -08002925/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2926 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2927 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2928 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2929 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2930 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2931 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2932 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002933
David Daney3ada9c12009-01-15 17:45:31 -08002934 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2935 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2936 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002937
David Daney3ada9c12009-01-15 17:45:31 -08002938 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2939 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2940 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2941 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2942 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002943
David Daney3ada9c12009-01-15 17:45:31 -08002944/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2945 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2946 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2947 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2948 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2949 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2950 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2951 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002952
2953 { 0xFF }
2954};
2955
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002956#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2957#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002958
2959static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2960{
David Daney3ada9c12009-01-15 17:45:31 -08002961 q->setup = EZ(t->setup * 1000, T);
2962 q->act8b = EZ(t->act8b * 1000, T);
2963 q->rec8b = EZ(t->rec8b * 1000, T);
2964 q->cyc8b = EZ(t->cyc8b * 1000, T);
2965 q->active = EZ(t->active * 1000, T);
2966 q->recover = EZ(t->recover * 1000, T);
2967 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2968 q->cycle = EZ(t->cycle * 1000, T);
2969 q->udma = EZ(t->udma * 1000, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002970}
2971
2972void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2973 struct ata_timing *m, unsigned int what)
2974{
2975 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2976 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2977 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2978 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2979 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2980 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
David Daney3ada9c12009-01-15 17:45:31 -08002981 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
Alan Cox452503f2005-10-21 19:01:32 -04002982 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2983 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2984}
2985
Tejun Heo63573572007-11-27 19:43:39 +09002986const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04002987{
Tejun Heo70cd0712007-11-27 19:43:40 +09002988 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04002989
Tejun Heo70cd0712007-11-27 19:43:40 +09002990 while (xfer_mode > t->mode)
2991 t++;
2992
2993 if (xfer_mode == t->mode)
2994 return t;
Borislav Petkovcd705d52012-10-21 18:57:56 +02002995
2996 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
2997 __func__, xfer_mode);
2998
Tejun Heo70cd0712007-11-27 19:43:40 +09002999 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04003000}
3001
3002int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3003 struct ata_timing *t, int T, int UT)
3004{
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01003005 const u16 *id = adev->id;
Alan Cox452503f2005-10-21 19:01:32 -04003006 const struct ata_timing *s;
3007 struct ata_timing p;
3008
3009 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003010 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08003011 */
Alan Cox452503f2005-10-21 19:01:32 -04003012
3013 if (!(s = ata_timing_find_mode(speed)))
3014 return -EINVAL;
3015
Albert Lee75b1f2f2005-11-16 17:06:18 +08003016 memcpy(t, s, sizeof(*s));
3017
Alan Cox452503f2005-10-21 19:01:32 -04003018 /*
3019 * If the drive is an EIDE drive, it can tell us it needs extended
3020 * PIO/MW_DMA cycle timing.
3021 */
3022
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01003023 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
Alan Cox452503f2005-10-21 19:01:32 -04003024 memset(&p, 0, sizeof(p));
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01003025
Bartlomiej Zolnierkiewiczbff00252011-10-13 15:17:32 +02003026 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01003027 if (speed <= XFER_PIO_2)
3028 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
3029 else if ((speed <= XFER_PIO_4) ||
3030 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
3031 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
3032 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
3033 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
3034
Alan Cox452503f2005-10-21 19:01:32 -04003035 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3036 }
3037
3038 /*
3039 * Convert the timing to bus clock counts.
3040 */
3041
Albert Lee75b1f2f2005-11-16 17:06:18 +08003042 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04003043
3044 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003045 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3046 * S.M.A.R.T * and some other commands. We have to ensure that the
3047 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04003048 */
3049
Alanfd3367af2006-12-07 12:41:18 +00003050 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04003051 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3052 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3053 }
3054
3055 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003056 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04003057 */
3058
3059 if (t->act8b + t->rec8b < t->cyc8b) {
3060 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3061 t->rec8b = t->cyc8b - t->act8b;
3062 }
3063
3064 if (t->active + t->recover < t->cycle) {
3065 t->active += (t->cycle - (t->active + t->recover)) / 2;
3066 t->recover = t->cycle - t->active;
3067 }
Jeff Garzika617c092007-05-21 20:14:23 -04003068
Alan Cox4f701d12007-04-23 11:55:36 +01003069 /* In a few cases quantisation may produce enough errors to
3070 leave t->cycle too low for the sum of active and recovery
3071 if so we must correct this */
3072 if (t->active + t->recover > t->cycle)
3073 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04003074
3075 return 0;
3076}
3077
Tejun Heocf176e12006-04-02 17:54:46 +09003078/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09003079 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3080 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3081 * @cycle: cycle duration in ns
3082 *
3083 * Return matching xfer mode for @cycle. The returned mode is of
3084 * the transfer type specified by @xfer_shift. If @cycle is too
3085 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3086 * than the fastest known mode, the fasted mode is returned.
3087 *
3088 * LOCKING:
3089 * None.
3090 *
3091 * RETURNS:
3092 * Matching xfer_mode, 0xff if no match found.
3093 */
3094u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3095{
3096 u8 base_mode = 0xff, last_mode = 0xff;
3097 const struct ata_xfer_ent *ent;
3098 const struct ata_timing *t;
3099
3100 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3101 if (ent->shift == xfer_shift)
3102 base_mode = ent->base;
3103
3104 for (t = ata_timing_find_mode(base_mode);
3105 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3106 unsigned short this_cycle;
3107
3108 switch (xfer_shift) {
3109 case ATA_SHIFT_PIO:
3110 case ATA_SHIFT_MWDMA:
3111 this_cycle = t->cycle;
3112 break;
3113 case ATA_SHIFT_UDMA:
3114 this_cycle = t->udma;
3115 break;
3116 default:
3117 return 0xff;
3118 }
3119
3120 if (cycle > this_cycle)
3121 break;
3122
3123 last_mode = t->mode;
3124 }
3125
3126 return last_mode;
3127}
3128
3129/**
Tejun Heocf176e12006-04-02 17:54:46 +09003130 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003131 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003132 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003133 *
3134 * Adjust xfer masks of @dev downward. Note that this function
3135 * does not apply the change. Invoking ata_set_mode() afterwards
3136 * will apply the limit.
3137 *
3138 * LOCKING:
3139 * Inherited from caller.
3140 *
3141 * RETURNS:
3142 * 0 on success, negative errno on failure
3143 */
Tejun Heo458337d2007-02-02 16:22:30 +09003144int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003145{
Tejun Heo458337d2007-02-02 16:22:30 +09003146 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003147 unsigned long orig_mask, xfer_mask;
3148 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003149 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003150
Tejun Heo458337d2007-02-02 16:22:30 +09003151 quiet = !!(sel & ATA_DNXFER_QUIET);
3152 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003153
Tejun Heo458337d2007-02-02 16:22:30 +09003154 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3155 dev->mwdma_mask,
3156 dev->udma_mask);
3157 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003158
Tejun Heo458337d2007-02-02 16:22:30 +09003159 switch (sel) {
3160 case ATA_DNXFER_PIO:
3161 highbit = fls(pio_mask) - 1;
3162 pio_mask &= ~(1 << highbit);
3163 break;
3164
3165 case ATA_DNXFER_DMA:
3166 if (udma_mask) {
3167 highbit = fls(udma_mask) - 1;
3168 udma_mask &= ~(1 << highbit);
3169 if (!udma_mask)
3170 return -ENOENT;
3171 } else if (mwdma_mask) {
3172 highbit = fls(mwdma_mask) - 1;
3173 mwdma_mask &= ~(1 << highbit);
3174 if (!mwdma_mask)
3175 return -ENOENT;
3176 }
3177 break;
3178
3179 case ATA_DNXFER_40C:
3180 udma_mask &= ATA_UDMA_MASK_40C;
3181 break;
3182
3183 case ATA_DNXFER_FORCE_PIO0:
3184 pio_mask &= 1;
3185 case ATA_DNXFER_FORCE_PIO:
3186 mwdma_mask = 0;
3187 udma_mask = 0;
3188 break;
3189
Tejun Heo458337d2007-02-02 16:22:30 +09003190 default:
3191 BUG();
3192 }
3193
3194 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3195
3196 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3197 return -ENOENT;
3198
3199 if (!quiet) {
3200 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3201 snprintf(buf, sizeof(buf), "%s:%s",
3202 ata_mode_string(xfer_mask),
3203 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3204 else
3205 snprintf(buf, sizeof(buf), "%s",
3206 ata_mode_string(xfer_mask));
3207
Joe Perchesa9a79df2011-04-15 15:51:59 -07003208 ata_dev_warn(dev, "limiting speed to %s\n", buf);
Tejun Heo458337d2007-02-02 16:22:30 +09003209 }
Tejun Heocf176e12006-04-02 17:54:46 +09003210
3211 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3212 &dev->udma_mask);
3213
Tejun Heocf176e12006-04-02 17:54:46 +09003214 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003215}
3216
Tejun Heo3373efd2006-05-15 20:57:53 +09003217static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218{
Tejun Heod0cb43b2009-07-09 09:27:50 +09003219 struct ata_port *ap = dev->link->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003220 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003221 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
Tejun Heo4055dee2008-02-07 10:34:08 +09003222 const char *dev_err_whine = "";
3223 int ign_dev_err = 0;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003224 unsigned int err_mask = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003225 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226
Tejun Heoe8384602006-04-02 18:51:53 +09003227 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003228 if (dev->xfer_shift == ATA_SHIFT_PIO)
3229 dev->flags |= ATA_DFLAG_PIO;
3230
Tejun Heod0cb43b2009-07-09 09:27:50 +09003231 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3232 dev_err_whine = " (SET_XFERMODE skipped)";
3233 else {
3234 if (nosetxfer)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003235 ata_dev_warn(dev,
3236 "NOSETXFER but PATA detected - can't "
3237 "skip SETXFER, might malfunction\n");
Tejun Heod0cb43b2009-07-09 09:27:50 +09003238 err_mask = ata_dev_set_xfermode(dev);
3239 }
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003240
Tejun Heo4055dee2008-02-07 10:34:08 +09003241 if (err_mask & ~AC_ERR_DEV)
3242 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003243
Tejun Heo4055dee2008-02-07 10:34:08 +09003244 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003245 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003246 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003247 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003248 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003249 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003250
Alan Coxb93fda12008-04-08 16:36:44 +01003251 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3252 /* Old CFA may refuse this command, which is just fine */
3253 if (ata_id_is_cfa(dev->id))
3254 ign_dev_err = 1;
3255 /* Catch several broken garbage emulations plus some pre
3256 ATA devices */
3257 if (ata_id_major_version(dev->id) == 0 &&
3258 dev->pio_mode <= XFER_PIO_2)
3259 ign_dev_err = 1;
3260 /* Some very old devices and some bad newer ones fail
3261 any kind of SET_XFERMODE request but support PIO0-2
3262 timings and no IORDY */
3263 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3264 ign_dev_err = 1;
3265 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003266 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3267 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3268 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3269 dev->dma_mode == XFER_MW_DMA_0 &&
3270 (dev->id[63] >> 8) & 1)
3271 ign_dev_err = 1;
3272
3273 /* if the device is actually configured correctly, ignore dev err */
3274 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3275 ign_dev_err = 1;
3276
3277 if (err_mask & AC_ERR_DEV) {
3278 if (!ign_dev_err)
3279 goto fail;
3280 else
3281 dev_err_whine = " (device error ignored)";
3282 }
3283
Tejun Heo23e71c32006-03-06 04:31:57 +09003284 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3285 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003286
Joe Perchesa9a79df2011-04-15 15:51:59 -07003287 ata_dev_info(dev, "configured for %s%s\n",
3288 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3289 dev_err_whine);
Tejun Heo4055dee2008-02-07 10:34:08 +09003290
Tejun Heo83206a22006-03-24 15:25:31 +09003291 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003292
3293 fail:
Joe Perchesa9a79df2011-04-15 15:51:59 -07003294 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
Tejun Heo4055dee2008-02-07 10:34:08 +09003295 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003296}
3297
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298/**
Alan04351822007-03-06 02:37:52 -08003299 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003300 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003301 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302 *
Alan04351822007-03-06 02:37:52 -08003303 * Standard implementation of the function used to tune and set
3304 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3305 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003306 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003307 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003308 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003309 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003310 *
3311 * RETURNS:
3312 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003313 */
Alan04351822007-03-06 02:37:52 -08003314
Tejun Heo02607312007-08-06 18:36:23 +09003315int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003316{
Tejun Heo02607312007-08-06 18:36:23 +09003317 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003318 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003319 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003320
Tejun Heoa6d5a512006-03-06 04:31:57 +09003321 /* step 1: calculate xfer_mask */
Tejun Heo1eca4362008-11-03 20:03:17 +09003322 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003323 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003324 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003325
Alan Coxb3a70602007-10-02 12:38:26 -04003326 mode_mask = ATA_DMA_MASK_ATA;
3327 if (dev->class == ATA_DEV_ATAPI)
3328 mode_mask = ATA_DMA_MASK_ATAPI;
3329 else if (ata_id_is_cfa(dev->id))
3330 mode_mask = ATA_DMA_MASK_CFA;
3331
Tejun Heo3373efd2006-05-15 20:57:53 +09003332 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003333 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003334
Tejun Heoacf356b2006-03-24 14:07:50 +09003335 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
Alan Coxb3a70602007-10-02 12:38:26 -04003336
3337 if (libata_dma_mask & mode_mask)
Sergei Shtylyov80a9c432011-12-22 22:41:32 +03003338 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3339 dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003340 else
3341 dma_mask = 0;
3342
Tejun Heoacf356b2006-03-24 14:07:50 +09003343 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3344 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003345
Tejun Heo4f659772006-04-01 01:38:18 +09003346 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003347 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003348 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003349 }
Tejun Heo4f659772006-04-01 01:38:18 +09003350 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003351 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003352
3353 /* step 2: always set host PIO timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003354 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo70cd0712007-11-27 19:43:40 +09003355 if (dev->pio_mode == 0xff) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003356 ata_dev_warn(dev, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003357 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003358 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003359 }
3360
3361 dev->xfer_mode = dev->pio_mode;
3362 dev->xfer_shift = ATA_SHIFT_PIO;
3363 if (ap->ops->set_piomode)
3364 ap->ops->set_piomode(ap, dev);
3365 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366
Tejun Heoa6d5a512006-03-06 04:31:57 +09003367 /* step 3: set host DMA timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003368 ata_for_each_dev(dev, link, ENABLED) {
3369 if (!ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003370 continue;
3371
3372 dev->xfer_mode = dev->dma_mode;
3373 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3374 if (ap->ops->set_dmamode)
3375 ap->ops->set_dmamode(ap, dev);
3376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003377
3378 /* step 4: update devices' xfer mode */
Tejun Heo1eca4362008-11-03 20:03:17 +09003379 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo3373efd2006-05-15 20:57:53 +09003380 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003381 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003382 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003384
Tejun Heoe8e06192006-04-01 01:38:18 +09003385 /* Record simplex status. If we selected DMA then the other
3386 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003387 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003388 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003389 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003390
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003391 out:
3392 if (rc)
3393 *r_failed_dev = dev;
3394 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395}
3396
3397/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003398 * ata_wait_ready - wait for link to become ready
3399 * @link: link to be waited on
3400 * @deadline: deadline jiffies for the operation
3401 * @check_ready: callback to check link readiness
3402 *
3403 * Wait for @link to become ready. @check_ready should return
3404 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3405 * link doesn't seem to be occupied, other errno for other error
3406 * conditions.
3407 *
3408 * Transient -ENODEV conditions are allowed for
3409 * ATA_TMOUT_FF_WAIT.
3410 *
3411 * LOCKING:
3412 * EH context.
3413 *
3414 * RETURNS:
3415 * 0 if @linke is ready before @deadline; otherwise, -errno.
3416 */
3417int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3418 int (*check_ready)(struct ata_link *link))
3419{
3420 unsigned long start = jiffies;
Tejun Heob48d58f2010-04-09 19:46:38 +09003421 unsigned long nodev_deadline;
Tejun Heoaa2731a2008-04-07 22:47:19 +09003422 int warned = 0;
3423
Tejun Heob48d58f2010-04-09 19:46:38 +09003424 /* choose which 0xff timeout to use, read comment in libata.h */
3425 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3426 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3427 else
3428 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3429
Tejun Heob1c72912008-07-31 17:02:43 +09003430 /* Slave readiness can't be tested separately from master. On
3431 * M/S emulation configuration, this function should be called
3432 * only on the master and it will handle both master and slave.
3433 */
3434 WARN_ON(link == link->ap->slave_link);
3435
Tejun Heoaa2731a2008-04-07 22:47:19 +09003436 if (time_after(nodev_deadline, deadline))
3437 nodev_deadline = deadline;
3438
3439 while (1) {
3440 unsigned long now = jiffies;
3441 int ready, tmp;
3442
3443 ready = tmp = check_ready(link);
3444 if (ready > 0)
3445 return 0;
3446
Tejun Heob48d58f2010-04-09 19:46:38 +09003447 /*
3448 * -ENODEV could be transient. Ignore -ENODEV if link
Tejun Heoaa2731a2008-04-07 22:47:19 +09003449 * is online. Also, some SATA devices take a long
Tejun Heob48d58f2010-04-09 19:46:38 +09003450 * time to clear 0xff after reset. Wait for
3451 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3452 * offline.
Tejun Heoaa2731a2008-04-07 22:47:19 +09003453 *
3454 * Note that some PATA controllers (pata_ali) explode
3455 * if status register is read more than once when
3456 * there's no device attached.
3457 */
3458 if (ready == -ENODEV) {
3459 if (ata_link_online(link))
3460 ready = 0;
3461 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3462 !ata_link_offline(link) &&
3463 time_before(now, nodev_deadline))
3464 ready = 0;
3465 }
3466
3467 if (ready)
3468 return ready;
3469 if (time_after(now, deadline))
3470 return -EBUSY;
3471
3472 if (!warned && time_after(now, start + 5 * HZ) &&
3473 (deadline - now > 3 * HZ)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003474 ata_link_warn(link,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003475 "link is slow to respond, please be patient "
3476 "(ready=%d)\n", tmp);
3477 warned = 1;
3478 }
3479
Tejun Heo97750ce2010-09-06 17:56:29 +02003480 ata_msleep(link->ap, 50);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003481 }
3482}
3483
3484/**
3485 * ata_wait_after_reset - wait for link to become ready after reset
3486 * @link: link to be waited on
3487 * @deadline: deadline jiffies for the operation
3488 * @check_ready: callback to check link readiness
3489 *
3490 * Wait for @link to become ready after reset.
3491 *
3492 * LOCKING:
3493 * EH context.
3494 *
3495 * RETURNS:
3496 * 0 if @linke is ready before @deadline; otherwise, -errno.
3497 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003498int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003499 int (*check_ready)(struct ata_link *link))
3500{
Tejun Heo97750ce2010-09-06 17:56:29 +02003501 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003502
3503 return ata_wait_ready(link, deadline, check_ready);
3504}
3505
3506/**
Tejun Heo936fd732007-08-06 18:36:23 +09003507 * sata_link_debounce - debounce SATA phy status
3508 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003509 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003510 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003511 *
Tejun Heo1152b262010-09-01 17:50:05 +02003512 * Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003513 * holding the same value where DET is not 1 for @duration polled
3514 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003515 * beginning of the stable state. Because DET gets stuck at 1 on
3516 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003517 * until timeout then returns 0 if DET is stable at 1.
3518 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003519 * @timeout is further limited by @deadline. The sooner of the
3520 * two is used.
3521 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003522 * LOCKING:
3523 * Kernel thread context (may sleep)
3524 *
3525 * RETURNS:
3526 * 0 on success, -errno on failure.
3527 */
Tejun Heo936fd732007-08-06 18:36:23 +09003528int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3529 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003530{
Tejun Heo341c2c92008-05-20 02:17:51 +09003531 unsigned long interval = params[0];
3532 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003533 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003534 u32 last, cur;
3535 int rc;
3536
Tejun Heo341c2c92008-05-20 02:17:51 +09003537 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003538 if (time_before(t, deadline))
3539 deadline = t;
3540
Tejun Heo936fd732007-08-06 18:36:23 +09003541 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003542 return rc;
3543 cur &= 0xf;
3544
3545 last = cur;
3546 last_jiffies = jiffies;
3547
3548 while (1) {
Tejun Heo97750ce2010-09-06 17:56:29 +02003549 ata_msleep(link->ap, interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003550 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003551 return rc;
3552 cur &= 0xf;
3553
3554 /* DET stable? */
3555 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003556 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003557 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003558 if (time_after(jiffies,
3559 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003560 return 0;
3561 continue;
3562 }
3563
3564 /* unstable, start over */
3565 last = cur;
3566 last_jiffies = jiffies;
3567
Tejun Heof1545152007-07-16 14:29:40 +09003568 /* Check deadline. If debouncing failed, return
3569 * -EPIPE to tell upper layer to lower link speed.
3570 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003571 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003572 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003573 }
3574}
3575
3576/**
Tejun Heo936fd732007-08-06 18:36:23 +09003577 * sata_link_resume - resume SATA link
3578 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003579 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003580 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003581 *
Tejun Heo936fd732007-08-06 18:36:23 +09003582 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003583 *
3584 * LOCKING:
3585 * Kernel thread context (may sleep)
3586 *
3587 * RETURNS:
3588 * 0 on success, -errno on failure.
3589 */
Tejun Heo936fd732007-08-06 18:36:23 +09003590int sata_link_resume(struct ata_link *link, const unsigned long *params,
3591 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003592{
Tejun Heo5040ab62010-01-11 11:14:44 +09003593 int tries = ATA_LINK_RESUME_TRIES;
Tejun Heoac371982008-04-07 22:47:19 +09003594 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003595 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003596
Tejun Heo936fd732007-08-06 18:36:23 +09003597 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003598 return rc;
3599
Tejun Heo5040ab62010-01-11 11:14:44 +09003600 /*
3601 * Writes to SControl sometimes get ignored under certain
3602 * controllers (ata_piix SIDPR). Make sure DET actually is
3603 * cleared.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003604 */
Tejun Heo5040ab62010-01-11 11:14:44 +09003605 do {
3606 scontrol = (scontrol & 0x0f0) | 0x300;
3607 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3608 return rc;
3609 /*
3610 * Some PHYs react badly if SStatus is pounded
3611 * immediately after resuming. Delay 200ms before
3612 * debouncing.
3613 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003614 ata_msleep(link->ap, 200);
Tejun Heo5040ab62010-01-11 11:14:44 +09003615
3616 /* is SControl restored correctly? */
3617 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3618 return rc;
3619 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3620
3621 if ((scontrol & 0xf0f) != 0x300) {
Tejun Heo38941c92011-07-01 15:12:09 +02003622 ata_link_warn(link, "failed to resume link (SControl %X)\n",
Joe Perchesa9a79df2011-04-15 15:51:59 -07003623 scontrol);
Tejun Heo5040ab62010-01-11 11:14:44 +09003624 return 0;
3625 }
3626
3627 if (tries < ATA_LINK_RESUME_TRIES)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003628 ata_link_warn(link, "link resume succeeded after %d retries\n",
3629 ATA_LINK_RESUME_TRIES - tries);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003630
Tejun Heoac371982008-04-07 22:47:19 +09003631 if ((rc = sata_link_debounce(link, params, deadline)))
3632 return rc;
3633
Tejun Heof0465192008-05-19 01:15:08 +09003634 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003635 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3636 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003637
Tejun Heof0465192008-05-19 01:15:08 +09003638 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003639}
3640
Tejun Heof5914a42006-05-31 18:27:48 +09003641/**
Tejun Heo1152b262010-09-01 17:50:05 +02003642 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3643 * @link: ATA link to manipulate SControl for
3644 * @policy: LPM policy to configure
3645 * @spm_wakeup: initiate LPM transition to active state
3646 *
3647 * Manipulate the IPM field of the SControl register of @link
3648 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3649 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3650 * the link. This function also clears PHYRDY_CHG before
3651 * returning.
3652 *
3653 * LOCKING:
3654 * EH context.
3655 *
3656 * RETURNS:
3657 * 0 on succes, -errno otherwise.
3658 */
3659int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3660 bool spm_wakeup)
3661{
3662 struct ata_eh_context *ehc = &link->eh_context;
3663 bool woken_up = false;
3664 u32 scontrol;
3665 int rc;
3666
3667 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3668 if (rc)
3669 return rc;
3670
3671 switch (policy) {
3672 case ATA_LPM_MAX_POWER:
3673 /* disable all LPM transitions */
Shane Huang65fe1f02012-09-07 22:40:01 +08003674 scontrol |= (0x7 << 8);
Tejun Heo1152b262010-09-01 17:50:05 +02003675 /* initiate transition to active state */
3676 if (spm_wakeup) {
3677 scontrol |= (0x4 << 12);
3678 woken_up = true;
3679 }
3680 break;
3681 case ATA_LPM_MED_POWER:
3682 /* allow LPM to PARTIAL */
3683 scontrol &= ~(0x1 << 8);
Shane Huang65fe1f02012-09-07 22:40:01 +08003684 scontrol |= (0x6 << 8);
Tejun Heo1152b262010-09-01 17:50:05 +02003685 break;
3686 case ATA_LPM_MIN_POWER:
Kristen Carlson Accardi8a745f12011-03-04 10:24:11 -08003687 if (ata_link_nr_enabled(link) > 0)
3688 /* no restrictions on LPM transitions */
Shane Huang65fe1f02012-09-07 22:40:01 +08003689 scontrol &= ~(0x7 << 8);
Kristen Carlson Accardi8a745f12011-03-04 10:24:11 -08003690 else {
3691 /* empty port, power off */
3692 scontrol &= ~0xf;
3693 scontrol |= (0x1 << 2);
3694 }
Tejun Heo1152b262010-09-01 17:50:05 +02003695 break;
3696 default:
3697 WARN_ON(1);
3698 }
3699
3700 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3701 if (rc)
3702 return rc;
3703
3704 /* give the link time to transit out of LPM state */
3705 if (woken_up)
3706 msleep(10);
3707
3708 /* clear PHYRDY_CHG from SError */
3709 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3710 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3711}
3712
3713/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003714 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003715 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003716 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003717 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003718 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003719 * prereset makes libata abort whole reset sequence and give up
3720 * that port, so prereset should be best-effort. It does its
3721 * best to prepare for reset sequence but if things go wrong, it
3722 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003723 *
3724 * LOCKING:
3725 * Kernel thread context (may sleep)
3726 *
3727 * RETURNS:
3728 * 0 on success, -errno otherwise.
3729 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003730int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003731{
Tejun Heocc0680a2007-08-06 18:36:23 +09003732 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003733 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003734 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003735 int rc;
3736
Tejun Heof5914a42006-05-31 18:27:48 +09003737 /* if we're about to do hardreset, nothing more to do */
3738 if (ehc->i.action & ATA_EH_HARDRESET)
3739 return 0;
3740
Tejun Heo936fd732007-08-06 18:36:23 +09003741 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003742 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003743 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003744 /* whine about phy resume failure but proceed */
3745 if (rc && rc != -EOPNOTSUPP)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003746 ata_link_warn(link,
3747 "failed to resume link for reset (errno=%d)\n",
3748 rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003749 }
3750
Tejun Heo45db2f62008-04-08 01:46:56 +09003751 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003752 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003753 ehc->i.action &= ~ATA_EH_SOFTRESET;
3754
Tejun Heof5914a42006-05-31 18:27:48 +09003755 return 0;
3756}
3757
Tejun Heoc2bd5802006-01-24 17:05:22 +09003758/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003759 * sata_link_hardreset - reset link via SATA phy reset
3760 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003761 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003762 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003763 * @online: optional out parameter indicating link onlineness
3764 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003765 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003766 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003767 * After hardreset, link readiness is waited upon using
3768 * ata_wait_ready() if @check_ready is specified. LLDs are
3769 * allowed to not specify @check_ready and wait itself after this
3770 * function returns. Device classification is LLD's
3771 * responsibility.
3772 *
3773 * *@online is set to one iff reset succeeded and @link is online
3774 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003775 *
3776 * LOCKING:
3777 * Kernel thread context (may sleep)
3778 *
3779 * RETURNS:
3780 * 0 on success, -errno otherwise.
3781 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003782int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003783 unsigned long deadline,
3784 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003785{
Tejun Heo852ee162006-04-01 01:38:18 +09003786 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003787 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003788
Tejun Heoc2bd5802006-01-24 17:05:22 +09003789 DPRINTK("ENTER\n");
3790
Tejun Heo9dadd452008-04-07 22:47:19 +09003791 if (online)
3792 *online = false;
3793
Tejun Heo936fd732007-08-06 18:36:23 +09003794 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003795 /* SATA spec says nothing about how to reconfigure
3796 * spd. To be on the safe side, turn off phy during
3797 * reconfiguration. This works for at least ICH7 AHCI
3798 * and Sil3124.
3799 */
Tejun Heo936fd732007-08-06 18:36:23 +09003800 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003801 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003802
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003803 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003804
Tejun Heo936fd732007-08-06 18:36:23 +09003805 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003806 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003807
Tejun Heo936fd732007-08-06 18:36:23 +09003808 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003809 }
3810
3811 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003812 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003813 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003814
Tejun Heo852ee162006-04-01 01:38:18 +09003815 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003816
Tejun Heo936fd732007-08-06 18:36:23 +09003817 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003818 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003819
Tejun Heo1c3fae42006-04-02 20:53:28 +09003820 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003821 * 10.4.2 says at least 1 ms.
3822 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003823 ata_msleep(link->ap, 1);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003824
Tejun Heo936fd732007-08-06 18:36:23 +09003825 /* bring link back */
3826 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003827 if (rc)
3828 goto out;
3829 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003830 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003831 goto out;
3832
3833 /* Link is online. From this point, -ENODEV too is an error. */
3834 if (online)
3835 *online = true;
3836
Tejun Heo071f44b2008-04-07 22:47:22 +09003837 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003838 /* If PMP is supported, we have to do follow-up SRST.
3839 * Some PMPs don't send D2H Reg FIS after hardreset if
3840 * the first port is empty. Wait only for
3841 * ATA_TMOUT_PMP_SRST_WAIT.
3842 */
3843 if (check_ready) {
3844 unsigned long pmp_deadline;
3845
Tejun Heo341c2c92008-05-20 02:17:51 +09003846 pmp_deadline = ata_deadline(jiffies,
3847 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003848 if (time_after(pmp_deadline, deadline))
3849 pmp_deadline = deadline;
3850 ata_wait_ready(link, pmp_deadline, check_ready);
3851 }
3852 rc = -EAGAIN;
3853 goto out;
3854 }
3855
3856 rc = 0;
3857 if (check_ready)
3858 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003859 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003860 if (rc && rc != -EAGAIN) {
3861 /* online is set iff link is online && reset succeeded */
3862 if (online)
3863 *online = false;
Joe Perchesa9a79df2011-04-15 15:51:59 -07003864 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003865 }
Tejun Heob6103f62006-11-01 17:59:53 +09003866 DPRINTK("EXIT, rc=%d\n", rc);
3867 return rc;
3868}
3869
3870/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003871 * sata_std_hardreset - COMRESET w/o waiting or classification
3872 * @link: link to reset
3873 * @class: resulting class of attached device
3874 * @deadline: deadline jiffies for the operation
3875 *
3876 * Standard SATA COMRESET w/o waiting or classification.
3877 *
3878 * LOCKING:
3879 * Kernel thread context (may sleep)
3880 *
3881 * RETURNS:
3882 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3883 */
3884int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3885 unsigned long deadline)
3886{
3887 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3888 bool online;
3889 int rc;
3890
3891 /* do hardreset */
3892 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003893 return online ? -EAGAIN : rc;
3894}
3895
3896/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003897 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003898 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003899 * @classes: classes of attached devices
3900 *
3901 * This function is invoked after a successful reset. Note that
3902 * the device might have been reset more than once using
3903 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003904 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003905 * LOCKING:
3906 * Kernel thread context (may sleep)
3907 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003908void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003909{
Tejun Heof0465192008-05-19 01:15:08 +09003910 u32 serror;
3911
Tejun Heoc2bd5802006-01-24 17:05:22 +09003912 DPRINTK("ENTER\n");
3913
Tejun Heof0465192008-05-19 01:15:08 +09003914 /* reset complete, clear SError */
3915 if (!sata_scr_read(link, SCR_ERROR, &serror))
3916 sata_scr_write(link, SCR_ERROR, serror);
3917
Tejun Heoc2bd5802006-01-24 17:05:22 +09003918 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003919 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003920
Tejun Heoc2bd5802006-01-24 17:05:22 +09003921 DPRINTK("EXIT\n");
3922}
3923
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003924/**
Tejun Heo623a3122006-03-05 17:55:58 +09003925 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003926 * @dev: device to compare against
3927 * @new_class: class of the new device
3928 * @new_id: IDENTIFY page of the new device
3929 *
3930 * Compare @new_class and @new_id against @dev and determine
3931 * whether @dev is the device indicated by @new_class and
3932 * @new_id.
3933 *
3934 * LOCKING:
3935 * None.
3936 *
3937 * RETURNS:
3938 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3939 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003940static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3941 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003942{
3943 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003944 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3945 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003946
3947 if (dev->class != new_class) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003948 ata_dev_info(dev, "class mismatch %d != %d\n",
3949 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003950 return 0;
3951 }
3952
Tejun Heoa0cf7332007-01-02 20:18:49 +09003953 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3954 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3955 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3956 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003957
3958 if (strcmp(model[0], model[1])) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003959 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3960 model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003961 return 0;
3962 }
3963
3964 if (strcmp(serial[0], serial[1])) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003965 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3966 serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003967 return 0;
3968 }
3969
Tejun Heo623a3122006-03-05 17:55:58 +09003970 return 1;
3971}
3972
3973/**
Tejun Heofe309112007-05-15 03:28:15 +09003974 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003975 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003976 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003977 *
3978 * Re-read IDENTIFY page and make sure @dev is still attached to
3979 * the port.
3980 *
3981 * LOCKING:
3982 * Kernel thread context (may sleep)
3983 *
3984 * RETURNS:
3985 * 0 on success, negative errno otherwise
3986 */
Tejun Heofe309112007-05-15 03:28:15 +09003987int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003988{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003989 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003990 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003991 int rc;
3992
Tejun Heofe635c72006-05-15 20:57:35 +09003993 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003994 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003995 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003996 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003997
3998 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003999 if (!ata_dev_same_device(dev, class, id))
4000 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09004001
Tejun Heofe635c72006-05-15 20:57:35 +09004002 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09004003 return 0;
4004}
4005
4006/**
4007 * ata_dev_revalidate - Revalidate ATA device
4008 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09004009 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09004010 * @readid_flags: read ID flags
4011 *
4012 * Re-read IDENTIFY page, make sure @dev is still attached to the
4013 * port and reconfigure it according to the new IDENTIFY page.
4014 *
4015 * LOCKING:
4016 * Kernel thread context (may sleep)
4017 *
4018 * RETURNS:
4019 * 0 on success, negative errno otherwise
4020 */
Tejun Heo422c9da2007-09-23 13:14:12 +09004021int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4022 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09004023{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004024 u64 n_sectors = dev->n_sectors;
Tejun Heo5920dad2009-07-15 17:11:41 +09004025 u64 n_native_sectors = dev->n_native_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09004026 int rc;
4027
4028 if (!ata_dev_enabled(dev))
4029 return -ENODEV;
4030
Tejun Heo422c9da2007-09-23 13:14:12 +09004031 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4032 if (ata_class_enabled(new_class) &&
Borislav Petkovf0d06132009-04-26 16:33:34 +02004033 new_class != ATA_DEV_ATA &&
4034 new_class != ATA_DEV_ATAPI &&
4035 new_class != ATA_DEV_SEMB) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004036 ata_dev_info(dev, "class mismatch %u != %u\n",
4037 dev->class, new_class);
Tejun Heo422c9da2007-09-23 13:14:12 +09004038 rc = -ENODEV;
4039 goto fail;
4040 }
4041
Tejun Heofe309112007-05-15 03:28:15 +09004042 /* re-read ID */
4043 rc = ata_dev_reread_id(dev, readid_flags);
4044 if (rc)
4045 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09004046
4047 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09004048 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004049 if (rc)
4050 goto fail;
4051
4052 /* verify n_sectors hasn't changed */
Tejun Heo445d2112010-04-05 10:33:13 +09004053 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4054 dev->n_sectors == n_sectors)
4055 return 0;
4056
4057 /* n_sectors has changed */
Joe Perchesa9a79df2011-04-15 15:51:59 -07004058 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4059 (unsigned long long)n_sectors,
4060 (unsigned long long)dev->n_sectors);
Tejun Heo445d2112010-04-05 10:33:13 +09004061
4062 /*
4063 * Something could have caused HPA to be unlocked
4064 * involuntarily. If n_native_sectors hasn't changed and the
4065 * new size matches it, keep the device.
4066 */
4067 if (dev->n_native_sectors == n_native_sectors &&
4068 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004069 ata_dev_warn(dev,
4070 "new n_sectors matches native, probably "
4071 "late HPA unlock, n_sectors updated\n");
Tejun Heo68939ce2010-05-15 20:09:33 +02004072 /* use the larger n_sectors */
Tejun Heo445d2112010-04-05 10:33:13 +09004073 return 0;
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004074 }
4075
Tejun Heo445d2112010-04-05 10:33:13 +09004076 /*
4077 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4078 * unlocking HPA in those cases.
4079 *
4080 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4081 */
4082 if (dev->n_native_sectors == n_native_sectors &&
4083 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4084 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004085 ata_dev_warn(dev,
4086 "old n_sectors matches native, probably "
4087 "late HPA lock, will try to unlock HPA\n");
Tejun Heo445d2112010-04-05 10:33:13 +09004088 /* try unlocking HPA */
4089 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4090 rc = -EIO;
4091 } else
4092 rc = -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09004093
Tejun Heo445d2112010-04-05 10:33:13 +09004094 /* restore original n_[native_]sectors and fail */
4095 dev->n_native_sectors = n_native_sectors;
4096 dev->n_sectors = n_sectors;
Tejun Heo623a3122006-03-05 17:55:58 +09004097 fail:
Joe Perchesa9a79df2011-04-15 15:51:59 -07004098 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09004099 return rc;
4100}
4101
Alan Cox6919a0a2006-10-27 19:08:46 -07004102struct ata_blacklist_entry {
4103 const char *model_num;
4104 const char *model_rev;
4105 unsigned long horkage;
4106};
4107
4108static const struct ata_blacklist_entry ata_device_blacklist [] = {
4109 /* Devices with DMA related problems under Linux */
4110 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4111 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4112 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4113 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4114 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4115 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4116 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4117 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4118 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004119 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004120 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4121 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4122 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4123 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4124 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004125 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004126 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4127 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4128 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4129 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4130 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4131 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4132 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4133 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004134 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4135 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004136 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004137 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Prarit Bhargavad17d7942012-08-23 15:11:52 -04004138 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004139 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004140 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004141
Albert Lee18d6e9d2007-04-02 11:34:15 +08004142 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004143 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004144 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Shan Haia32450e2013-03-18 10:30:44 +08004145 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
Shan Hai0523f032013-10-28 16:08:01 +08004146 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004147
Alan Cox6919a0a2006-10-27 19:08:46 -07004148 /* Devices we expect to fail diagnostics */
4149
4150 /* Devices where NCQ should be avoided */
4151 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004152 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004153 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004154 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4155 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004156 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004157 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004158 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004159 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004160 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Lubomir Bulej5ccfca92008-12-22 11:35:22 +01004161 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004162
Tejun Heoac70a962008-11-27 13:36:48 +09004163 /* Seagate NCQ + FLUSH CACHE firmware bug */
Mark Lord4d1f9082010-07-05 18:53:37 -04004164 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004165 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004166
Mark Lord4d1f9082010-07-05 18:53:37 -04004167 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004168 ATA_HORKAGE_FIRMWARE_WARN },
4169
Mark Lord4d1f9082010-07-05 18:53:37 -04004170 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004171 ATA_HORKAGE_FIRMWARE_WARN },
4172
Mark Lord4d1f9082010-07-05 18:53:37 -04004173 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004174 ATA_HORKAGE_FIRMWARE_WARN },
4175
Michele Baldessari87809942013-11-25 19:00:14 +00004176 /* Seagate Momentus SpinPoint M8 seem to have FPMDA_AA issues */
4177 { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4178
Robert Hancock36e337d2007-04-02 22:05:29 -06004179 /* Blacklist entries taken from Silicon Image 3124/3132
4180 Windows driver .inf file - also several Linux problem reports */
4181 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4182 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4183 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004184
Tejun Heo68b0ddb2010-04-05 10:51:26 +09004185 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4186 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4187
Tejun Heo16c55b02007-08-29 11:58:33 +09004188 /* devices which puke on READ_NATIVE_MAX */
4189 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4190 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4191 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4192 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004193
Tejun Heo78313872009-08-07 01:59:15 +09004194 /* this one allows HPA unlocking but fails IOs on the area */
4195 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4196
Alan Cox93328e12007-09-29 04:06:48 -04004197 /* Devices which report 1 sector over size HPA */
4198 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4199 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004200 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004201
Alan Cox6bbfd532007-11-05 22:58:58 +00004202 /* Devices which get the IVB wrong */
4203 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004204 /* Maybe we should just blacklist TSSTcorp... */
Mark Lord7da4c932010-07-01 18:18:12 -04004205 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004206
Jens Axboe9ce8e302008-08-27 15:23:18 +02004207 /* Devices that do not need bridging limits applied */
4208 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
Jeff Garzik04d0f1b82012-08-17 13:36:59 -04004209 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
Jens Axboe9ce8e302008-08-27 15:23:18 +02004210
Tejun Heo90627122009-01-29 20:31:36 +09004211 /* Devices which aren't very happy with higher link speeds */
4212 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
Daniel J Bluemanc5310772012-07-23 12:22:37 +08004213 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
Tejun Heo90627122009-01-29 20:31:36 +09004214
Tejun Heod0cb43b2009-07-09 09:27:50 +09004215 /*
4216 * Devices which choke on SETXFER. Applies only if both the
4217 * device and controller are SATA.
4218 */
Tejun Heocd691872011-06-22 12:13:10 +02004219 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
Vladimir LAVALLADE3a251792012-01-08 13:50:13 +01004220 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4221 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
Tejun Heocd691872011-06-22 12:13:10 +02004222 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4223 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
Tejun Heod0cb43b2009-07-09 09:27:50 +09004224
Marc Carinof78dea02013-12-16 18:15:53 -08004225 /* devices that don't properly handle queued TRIM commands */
4226 { "Micron_M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
4227 { "Crucial_CT???M500SSD1", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
4228
Tejun Heoecd75ad2014-01-16 09:47:17 -05004229 /*
4230 * Some WD SATA-I drives spin up and down erratically when the link
4231 * is put into the slumber mode. We don't have full list of the
4232 * affected devices. Disable LPM if the device matches one of the
4233 * known prefixes and is SATA-1. As a side effect LPM partial is
4234 * lost too.
4235 *
4236 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4237 */
4238 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4239 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4240 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4241 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4242 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4243 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4244 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4245
Alan Cox6919a0a2006-10-27 19:08:46 -07004246 /* End Marker */
4247 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004248};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004249
Mark Lordbce036c2010-07-01 18:16:14 -04004250/**
4251 * glob_match - match a text string against a glob-style pattern
4252 * @text: the string to be examined
4253 * @pattern: the glob-style pattern to be matched against
4254 *
4255 * Either/both of text and pattern can be empty strings.
4256 *
4257 * Match text against a glob-style pattern, with wildcards and simple sets:
4258 *
4259 * ? matches any single character.
4260 * * matches any run of characters.
4261 * [xyz] matches a single character from the set: x, y, or z.
Mark Lord2f9e4d12010-07-05 10:25:45 -04004262 * [a-d] matches a single character from the range: a, b, c, or d.
4263 * [a-d0-9] matches a single character from either range.
Mark Lordbce036c2010-07-01 18:16:14 -04004264 *
Mark Lord2f9e4d12010-07-05 10:25:45 -04004265 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4266 * Behaviour with malformed patterns is undefined, though generally reasonable.
Mark Lordbce036c2010-07-01 18:16:14 -04004267 *
Randy Dunlap3d2be542010-08-09 16:28:30 -07004268 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
Mark Lordbce036c2010-07-01 18:16:14 -04004269 *
4270 * This function uses one level of recursion per '*' in pattern.
4271 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4272 * this will not cause stack problems for any reasonable use here.
4273 *
4274 * RETURNS:
4275 * 0 on match, 1 otherwise.
4276 */
4277static int glob_match (const char *text, const char *pattern)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004278{
Mark Lordbce036c2010-07-01 18:16:14 -04004279 do {
4280 /* Match single character or a '?' wildcard */
4281 if (*text == *pattern || *pattern == '?') {
4282 if (!*pattern++)
4283 return 0; /* End of both strings: match */
4284 } else {
4285 /* Match single char against a '[' bracketed ']' pattern set */
4286 if (!*text || *pattern != '[')
4287 break; /* Not a pattern set */
Mark Lord2f9e4d12010-07-05 10:25:45 -04004288 while (*++pattern && *pattern != ']' && *text != *pattern) {
4289 if (*pattern == '-' && *(pattern - 1) != '[')
4290 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4291 ++pattern;
4292 break;
4293 }
4294 }
Mark Lordbce036c2010-07-01 18:16:14 -04004295 if (!*pattern || *pattern == ']')
4296 return 1; /* No match */
4297 while (*pattern && *pattern++ != ']');
4298 }
4299 } while (*++text && *pattern);
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004300
Mark Lordbce036c2010-07-01 18:16:14 -04004301 /* Match any run of chars against a '*' wildcard */
4302 if (*pattern == '*') {
4303 if (!*++pattern)
4304 return 0; /* Match: avoid recursion at end of pattern */
4305 /* Loop to handle additional pattern chars after the wildcard */
4306 while (*text) {
4307 if (glob_match(text, pattern) == 0)
4308 return 0; /* Remainder matched */
4309 ++text; /* Absorb (match) this char and try again */
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004310 }
4311 }
Mark Lordbce036c2010-07-01 18:16:14 -04004312 if (!*text && !*pattern)
4313 return 0; /* End of both strings: match */
4314 return 1; /* No match */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004315}
Jeff Garzik4fca3772011-02-15 01:13:24 -05004316
Tejun Heo75683fe2007-07-05 13:31:27 +09004317static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004318{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004319 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4320 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004321 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004322
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004323 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4324 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325
Alan Cox6919a0a2006-10-27 19:08:46 -07004326 while (ad->model_num) {
Mark Lordbce036c2010-07-01 18:16:14 -04004327 if (!glob_match(model_num, ad->model_num)) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004328 if (ad->model_rev == NULL)
4329 return ad->horkage;
Mark Lordbce036c2010-07-01 18:16:14 -04004330 if (!glob_match(model_rev, ad->model_rev))
Alan Cox6919a0a2006-10-27 19:08:46 -07004331 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004332 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004333 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004334 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004335 return 0;
4336}
4337
Alan Cox6919a0a2006-10-27 19:08:46 -07004338static int ata_dma_blacklisted(const struct ata_device *dev)
4339{
4340 /* We don't support polling DMA.
4341 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4342 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4343 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004344 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004345 (dev->flags & ATA_DFLAG_CDB_INTR))
4346 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004347 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004348}
4349
Tejun Heoa6d5a512006-03-06 04:31:57 +09004350/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004351 * ata_is_40wire - check drive side detection
4352 * @dev: device
4353 *
4354 * Perform drive side detection decoding, allowing for device vendors
4355 * who can't follow the documentation.
4356 */
4357
4358static int ata_is_40wire(struct ata_device *dev)
4359{
4360 if (dev->horkage & ATA_HORKAGE_IVB)
4361 return ata_drive_40wire_relaxed(dev->id);
4362 return ata_drive_40wire(dev->id);
4363}
4364
4365/**
Alan Cox15a55512008-03-28 14:33:46 -07004366 * cable_is_40wire - 40/80/SATA decider
4367 * @ap: port to consider
4368 *
4369 * This function encapsulates the policy for speed management
4370 * in one place. At the moment we don't cache the result but
4371 * there is a good case for setting ap->cbl to the result when
4372 * we are called with unknown cables (and figuring out if it
4373 * impacts hotplug at all).
4374 *
4375 * Return 1 if the cable appears to be 40 wire.
4376 */
4377
4378static int cable_is_40wire(struct ata_port *ap)
4379{
4380 struct ata_link *link;
4381 struct ata_device *dev;
4382
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004383 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004384 if (ap->cbl == ATA_CBL_PATA40)
4385 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004386
4387 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004388 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4389 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004390
4391 /* If the system is known to be 40 wire short cable (eg
4392 * laptop), then we allow 80 wire modes even if the drive
4393 * isn't sure.
4394 */
Alan Coxf7920682008-04-08 16:37:50 +01004395 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4396 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004397
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004398 /* If the controller doesn't know, we scan.
4399 *
4400 * Note: We look for all 40 wire detects at this point. Any
4401 * 80 wire detect is taken to be 80 wire cable because
4402 * - in many setups only the one drive (slave if present) will
4403 * give a valid detect
4404 * - if you have a non detect capable drive you don't want it
4405 * to colour the choice
4406 */
Tejun Heo1eca4362008-11-03 20:03:17 +09004407 ata_for_each_link(link, ap, EDGE) {
4408 ata_for_each_dev(dev, link, ENABLED) {
4409 if (!ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004410 return 0;
4411 }
4412 }
4413 return 1;
4414}
4415
4416/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004417 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004418 * @dev: Device to compute xfermask for
4419 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004420 * Compute supported xfermask of @dev and store it in
4421 * dev->*_mask. This function is responsible for applying all
4422 * known limits including host controller limits, device
4423 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004424 *
4425 * LOCKING:
4426 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004427 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004428static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004429{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004430 struct ata_link *link = dev->link;
4431 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004432 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004433 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004434
Tejun Heo37deecb2006-08-10 16:59:07 +09004435 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004436 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4437 ap->mwdma_mask, ap->udma_mask);
4438
Robert Hancock8343f882007-03-06 02:37:51 -08004439 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004440 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4441 dev->mwdma_mask, dev->udma_mask);
4442 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004443
Alan Coxb352e572006-08-10 18:52:12 +01004444 /*
4445 * CFA Advanced TrueIDE timings are not allowed on a shared
4446 * cable
4447 */
4448 if (ata_dev_pair(dev)) {
4449 /* No PIO5 or PIO6 */
4450 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4451 /* No MWDMA3 or MWDMA 4 */
4452 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4453 }
4454
Tejun Heo37deecb2006-08-10 16:59:07 +09004455 if (ata_dma_blacklisted(dev)) {
4456 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Joe Perchesa9a79df2011-04-15 15:51:59 -07004457 ata_dev_warn(dev,
4458 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004459 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004460
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004461 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004462 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004463 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Joe Perchesa9a79df2011-04-15 15:51:59 -07004464 ata_dev_warn(dev,
4465 "simplex DMA is claimed by other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004466 }
Tejun Heo565083e2006-04-02 17:54:47 +09004467
Jeff Garzike4246752007-03-09 09:56:46 -05004468 if (ap->flags & ATA_FLAG_NO_IORDY)
4469 xfer_mask &= ata_pio_mask_no_iordy(dev);
4470
Alan Cox5444a6f2006-03-27 18:58:20 +01004471 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004472 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004473
Robert Hancock8343f882007-03-06 02:37:51 -08004474 /* Apply cable rule here. Don't apply it early because when
4475 * we handle hot plug the cable type can itself change.
4476 * Check this last so that we know if the transfer rate was
4477 * solely limited by the cable.
4478 * Unknown or 80 wire cables reported host side are checked
4479 * drive side as well. Cases where we know a 40wire cable
4480 * is used safely for 80 are not checked here.
4481 */
4482 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4483 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004484 if (cable_is_40wire(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004485 ata_dev_warn(dev,
4486 "limited to UDMA/33 due to 40-wire cable\n");
Robert Hancock8343f882007-03-06 02:37:51 -08004487 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4488 }
4489
Tejun Heo565083e2006-04-02 17:54:47 +09004490 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4491 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004492}
4493
Linus Torvalds1da177e2005-04-16 15:20:36 -07004494/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004495 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004496 * @dev: Device to which command will be sent
4497 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004498 * Issue SET FEATURES - XFER MODE command to device @dev
4499 * on port @ap.
4500 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004501 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004502 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004503 *
4504 * RETURNS:
4505 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506 */
4507
Tejun Heo3373efd2006-05-15 20:57:53 +09004508static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004509{
Tejun Heoa0123702005-12-13 14:49:31 +09004510 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004511 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004512
4513 /* set up set-features taskfile */
4514 DPRINTK("set features - xfer mode\n");
4515
Tejun Heo464cf172007-05-27 15:10:40 +02004516 /* Some controllers and ATAPI devices show flaky interrupt
4517 * behavior after setting xfer mode. Use polling instead.
4518 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004519 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004520 tf.command = ATA_CMD_SET_FEATURES;
4521 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004522 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004523 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004524 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004525 if (ata_pio_need_iordy(dev))
4526 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004527 /* If the device has IORDY and the controller does not - turn it off */
4528 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004529 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004530 else /* In the ancient relic department - skip all of this */
4531 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532
Tejun Heo2b789102007-10-09 15:05:44 +09004533 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534
Tejun Heo83206a22006-03-24 15:25:31 +09004535 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4536 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004537}
Tejun Heo1152b262010-09-01 17:50:05 +02004538
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004540 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004541 * @dev: Device to which command will be sent
4542 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004543 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004544 *
4545 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004546 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004547 *
4548 * LOCKING:
4549 * PCI/etc. bus probe sem.
4550 *
4551 * RETURNS:
4552 * 0 on success, AC_ERR_* mask otherwise.
4553 */
Tejun Heo1152b262010-09-01 17:50:05 +02004554unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004555{
4556 struct ata_taskfile tf;
4557 unsigned int err_mask;
4558
4559 /* set up set-features taskfile */
4560 DPRINTK("set features - SATA features\n");
4561
4562 ata_tf_init(dev, &tf);
4563 tf.command = ATA_CMD_SET_FEATURES;
4564 tf.feature = enable;
4565 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4566 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004567 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004568
Tejun Heo2b789102007-10-09 15:05:44 +09004569 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004570
4571 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4572 return err_mask;
4573}
Jeff Garzik633de4c2012-09-13 01:12:29 -04004574EXPORT_SYMBOL_GPL(ata_dev_set_feature);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004575
4576/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04004577 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04004578 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004579 * @heads: Number of heads (taskfile parameter)
4580 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004581 *
4582 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004583 * Kernel thread context (may sleep)
4584 *
4585 * RETURNS:
4586 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04004587 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004588static unsigned int ata_dev_init_params(struct ata_device *dev,
4589 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004590{
Tejun Heoa0123702005-12-13 14:49:31 +09004591 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004592 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004593
4594 /* Number of sectors per track 1-255. Number of heads 1-16 */
4595 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004596 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004597
4598 /* set up init dev params taskfile */
4599 DPRINTK("init dev params \n");
4600
Tejun Heo3373efd2006-05-15 20:57:53 +09004601 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004602 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4603 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4604 tf.protocol = ATA_PROT_NODATA;
4605 tf.nsect = sectors;
4606 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04004607
Tejun Heo2b789102007-10-09 15:05:44 +09004608 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004609 /* A clean abort indicates an original or just out of spec drive
4610 and we should continue as we issue the setup based on the
4611 drive reported working geometry */
4612 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4613 err_mask = 0;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004614
Tejun Heo6aff8f12006-02-15 18:24:09 +09004615 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4616 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004617}
4618
4619/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004620 * ata_sg_clean - Unmap DMA memory associated with command
4621 * @qc: Command containing DMA memory to be released
4622 *
4623 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004624 *
4625 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004626 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004627 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004628void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004629{
4630 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004631 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004632 int dir = qc->dma_dir;
4633
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004634 WARN_ON_ONCE(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004635
James Bottomleydde20202008-02-19 11:36:56 +01004636 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004637
James Bottomleydde20202008-02-19 11:36:56 +01004638 if (qc->n_elem)
FUJITA Tomonori58256272009-02-27 17:35:43 +09004639 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004640
4641 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004642 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004643}
4644
4645/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004646 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004647 * @qc: Metadata associated with taskfile to check
4648 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004649 * Allow low-level driver to filter ATA PACKET commands, returning
4650 * a status indicating whether or not it is OK to use DMA for the
4651 * supplied PACKET command.
4652 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004653 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004654 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004655 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004656 * RETURNS: 0 when ATAPI DMA can be used
4657 * nonzero otherwise
4658 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004659int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004660{
4661 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004662
Tejun Heob9a41972007-06-27 02:48:43 +09004663 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4664 * few ATAPI devices choke on such DMA requests.
4665 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004666 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4667 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004668 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004669
Linus Torvalds1da177e2005-04-16 15:20:36 -07004670 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004671 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004672
Tejun Heob9a41972007-06-27 02:48:43 +09004673 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004674}
Tejun Heob9a41972007-06-27 02:48:43 +09004675
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004677 * ata_std_qc_defer - Check whether a qc needs to be deferred
4678 * @qc: ATA command in question
4679 *
4680 * Non-NCQ commands cannot run with any other command, NCQ or
4681 * not. As upper layer only knows the queue depth, we are
4682 * responsible for maintaining exclusion. This function checks
4683 * whether a new command @qc can be issued.
4684 *
4685 * LOCKING:
4686 * spin_lock_irqsave(host lock)
4687 *
4688 * RETURNS:
4689 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4690 */
4691int ata_std_qc_defer(struct ata_queued_cmd *qc)
4692{
4693 struct ata_link *link = qc->dev->link;
4694
4695 if (qc->tf.protocol == ATA_PROT_NCQ) {
4696 if (!ata_tag_valid(link->active_tag))
4697 return 0;
4698 } else {
4699 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4700 return 0;
4701 }
4702
4703 return ATA_DEFER_LINK;
4704}
4705
Brian Kinge46834c2006-03-17 17:04:03 -06004706void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4707
Jeff Garzik0cba6322005-05-30 19:49:12 -04004708/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004709 * ata_sg_init - Associate command with scatter-gather table.
4710 * @qc: Command to be associated
4711 * @sg: Scatter-gather table.
4712 * @n_elem: Number of elements in s/g table.
4713 *
4714 * Initialize the data-related elements of queued_cmd @qc
4715 * to point to a scatter-gather table @sg, containing @n_elem
4716 * elements.
4717 *
4718 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004719 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004720 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004721void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4722 unsigned int n_elem)
4723{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004724 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004725 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004726 qc->cursg = qc->sg;
4727}
4728
Linus Torvalds1da177e2005-04-16 15:20:36 -07004729/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004730 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4731 * @qc: Command with scatter-gather table to be mapped.
4732 *
4733 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004734 *
4735 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004736 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004737 *
4738 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004739 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004740 *
4741 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004742static int ata_sg_setup(struct ata_queued_cmd *qc)
4743{
4744 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004745 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004746
Tejun Heo44877b42007-02-21 01:06:51 +09004747 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004748
James Bottomleydde20202008-02-19 11:36:56 +01004749 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4750 if (n_elem < 1)
4751 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004752
James Bottomleydde20202008-02-19 11:36:56 +01004753 DPRINTK("%d sg elements mapped\n", n_elem);
FUJITA Tomonori58256272009-02-27 17:35:43 +09004754 qc->orig_n_elem = qc->n_elem;
James Bottomleydde20202008-02-19 11:36:56 +01004755 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004756 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004757
4758 return 0;
4759}
4760
4761/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004762 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004763 * @buf: Buffer to swap
4764 * @buf_words: Number of 16-bit words in buffer.
4765 *
4766 * Swap halves of 16-bit words if needed to convert from
4767 * little-endian byte order to native cpu byte order, or
4768 * vice-versa.
4769 *
4770 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004771 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004772 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004773void swap_buf_le16(u16 *buf, unsigned int buf_words)
4774{
4775#ifdef __BIG_ENDIAN
4776 unsigned int i;
4777
4778 for (i = 0; i < buf_words; i++)
4779 buf[i] = le16_to_cpu(buf[i]);
4780#endif /* __BIG_ENDIAN */
4781}
4782
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004783/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004784 * ata_qc_new - Request an available ATA command, for queueing
Randy Dunlap5eb66fe2009-01-20 16:28:59 -08004785 * @ap: target port
Tejun Heo8a8bc222008-11-10 14:48:21 +09004786 *
4787 * LOCKING:
4788 * None.
4789 */
4790
4791static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4792{
4793 struct ata_queued_cmd *qc = NULL;
4794 unsigned int i;
4795
4796 /* no command while frozen */
4797 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4798 return NULL;
4799
4800 /* the last tag is reserved for internal command. */
4801 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4802 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4803 qc = __ata_qc_from_tag(ap, i);
4804 break;
4805 }
4806
4807 if (qc)
4808 qc->tag = i;
4809
4810 return qc;
4811}
4812
4813/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004814 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004815 * @dev: Device from whom we request an available command structure
4816 *
4817 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004818 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004819 */
4820
Tejun Heo8a8bc222008-11-10 14:48:21 +09004821struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004822{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004823 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004824 struct ata_queued_cmd *qc;
4825
Tejun Heo8a8bc222008-11-10 14:48:21 +09004826 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004827 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004828 qc->scsicmd = NULL;
4829 qc->ap = ap;
4830 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004831
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004832 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004833 }
4834
4835 return qc;
4836}
4837
Tejun Heo8a8bc222008-11-10 14:48:21 +09004838/**
4839 * ata_qc_free - free unused ata_queued_cmd
4840 * @qc: Command to complete
4841 *
4842 * Designed to free unused ata_queued_cmd object
4843 * in case something prevents using it.
4844 *
4845 * LOCKING:
4846 * spin_lock_irqsave(host lock)
4847 */
4848void ata_qc_free(struct ata_queued_cmd *qc)
4849{
Julia Lawalla1104012009-10-17 08:41:47 +02004850 struct ata_port *ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004851 unsigned int tag;
4852
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004853 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Julia Lawalla1104012009-10-17 08:41:47 +02004854 ap = qc->ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004855
4856 qc->flags = 0;
4857 tag = qc->tag;
4858 if (likely(ata_tag_valid(tag))) {
4859 qc->tag = ATA_TAG_POISON;
4860 clear_bit(tag, &ap->qc_allocated);
4861 }
4862}
4863
Tejun Heo76014422006-02-11 15:13:49 +09004864void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004865{
Julia Lawalla1104012009-10-17 08:41:47 +02004866 struct ata_port *ap;
4867 struct ata_link *link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004868
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004869 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4870 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
Julia Lawalla1104012009-10-17 08:41:47 +02004871 ap = qc->ap;
4872 link = qc->dev->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004873
4874 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4875 ata_sg_clean(qc);
4876
Tejun Heo7401abf2006-05-15 20:57:32 +09004877 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004878 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004879 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004880 if (!link->sactive)
4881 ap->nr_active_links--;
4882 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004883 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004884 ap->nr_active_links--;
4885 }
4886
4887 /* clear exclusive status */
4888 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4889 ap->excl_link == link))
4890 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004891
Albert Lee3f3791d2005-08-16 14:25:38 +08004892 /* atapi: mark qc as inactive to prevent the interrupt handler
4893 * from completing the command twice later, before the error handler
4894 * is called. (when rc != 0 and atapi request sense is needed)
4895 */
4896 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004897 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004898
Linus Torvalds1da177e2005-04-16 15:20:36 -07004899 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004900 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004901}
4902
Tejun Heo39599a52006-11-14 22:37:35 +09004903static void fill_result_tf(struct ata_queued_cmd *qc)
4904{
4905 struct ata_port *ap = qc->ap;
4906
Tejun Heo39599a52006-11-14 22:37:35 +09004907 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004908 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004909}
4910
Tejun Heo00115e02007-11-27 19:28:58 +09004911static void ata_verify_xfer(struct ata_queued_cmd *qc)
4912{
4913 struct ata_device *dev = qc->dev;
4914
Tejun Heo00115e02007-11-27 19:28:58 +09004915 if (ata_is_nodata(qc->tf.protocol))
4916 return;
4917
4918 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4919 return;
4920
4921 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4922}
4923
Tejun Heof686bcb2006-05-15 20:58:05 +09004924/**
4925 * ata_qc_complete - Complete an active ATA command
4926 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004927 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004928 * Indicate to the mid and upper layers that an ATA command has
4929 * completed, with either an ok or not-ok status.
4930 *
4931 * Refrain from calling this function multiple times when
4932 * successfully completing multiple NCQ commands.
4933 * ata_qc_complete_multiple() should be used instead, which will
4934 * properly update IRQ expect state.
Tejun Heof686bcb2006-05-15 20:58:05 +09004935 *
4936 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004937 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004938 */
4939void ata_qc_complete(struct ata_queued_cmd *qc)
4940{
4941 struct ata_port *ap = qc->ap;
4942
4943 /* XXX: New EH and old EH use different mechanisms to
4944 * synchronize EH with regular execution path.
4945 *
4946 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4947 * Normal execution path is responsible for not accessing a
4948 * failed qc. libata core enforces the rule by returning NULL
4949 * from ata_qc_from_tag() for failed qcs.
4950 *
4951 * Old EH depends on ata_qc_complete() nullifying completion
4952 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4953 * not synchronize with interrupt handler. Only PIO task is
4954 * taken care of.
4955 */
4956 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004957 struct ata_device *dev = qc->dev;
4958 struct ata_eh_info *ehi = &dev->link->eh_info;
4959
Tejun Heof686bcb2006-05-15 20:58:05 +09004960 if (unlikely(qc->err_mask))
4961 qc->flags |= ATA_QCFLAG_FAILED;
4962
Tejun Heof08dc1a2010-12-09 15:59:32 +01004963 /*
4964 * Finish internal commands without any further processing
4965 * and always with the result TF filled.
4966 */
4967 if (unlikely(ata_tag_internal(qc->tag))) {
Tejun Heof4b31db92009-10-16 13:00:51 +09004968 fill_result_tf(qc);
Tejun Heof08dc1a2010-12-09 15:59:32 +01004969 __ata_qc_complete(qc);
4970 return;
4971 }
Tejun Heof4b31db92009-10-16 13:00:51 +09004972
Tejun Heof08dc1a2010-12-09 15:59:32 +01004973 /*
4974 * Non-internal qc has failed. Fill the result TF and
4975 * summon EH.
4976 */
4977 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4978 fill_result_tf(qc);
4979 ata_qc_schedule_eh(qc);
Tejun Heof4b31db92009-10-16 13:00:51 +09004980 return;
Tejun Heof686bcb2006-05-15 20:58:05 +09004981 }
4982
Tejun Heo4dc738e2009-09-17 18:45:27 +09004983 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4984
Tejun Heof686bcb2006-05-15 20:58:05 +09004985 /* read result TF if requested */
4986 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004987 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004988
Tejun Heo4dbfa392007-10-25 18:22:44 +09004989 /* Some commands need post-processing after successful
4990 * completion.
4991 */
4992 switch (qc->tf.command) {
4993 case ATA_CMD_SET_FEATURES:
4994 if (qc->tf.feature != SETFEATURES_WC_ON &&
4995 qc->tf.feature != SETFEATURES_WC_OFF)
4996 break;
4997 /* fall through */
4998 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4999 case ATA_CMD_SET_MULTI: /* multi_count changed */
5000 /* revalidate device */
5001 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5002 ata_port_schedule_eh(ap);
5003 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005004
5005 case ATA_CMD_SLEEP:
5006 dev->flags |= ATA_DFLAG_SLEEPING;
5007 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09005008 }
5009
Tejun Heo00115e02007-11-27 19:28:58 +09005010 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5011 ata_verify_xfer(qc);
5012
Tejun Heof686bcb2006-05-15 20:58:05 +09005013 __ata_qc_complete(qc);
5014 } else {
5015 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5016 return;
5017
5018 /* read result TF if failed or requested */
5019 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09005020 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005021
5022 __ata_qc_complete(qc);
5023 }
5024}
5025
Tejun Heodedaf2b2006-05-15 21:03:43 +09005026/**
5027 * ata_qc_complete_multiple - Complete multiple qcs successfully
5028 * @ap: port in question
5029 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09005030 *
5031 * Complete in-flight commands. This functions is meant to be
5032 * called from low-level driver's interrupt routine to complete
5033 * requests normally. ap->qc_active and @qc_active is compared
5034 * and commands are completed accordingly.
5035 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02005036 * Always use this function when completing multiple NCQ commands
5037 * from IRQ handlers instead of calling ata_qc_complete()
5038 * multiple times to keep IRQ expect status properly in sync.
5039 *
Tejun Heodedaf2b2006-05-15 21:03:43 +09005040 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005041 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09005042 *
5043 * RETURNS:
5044 * Number of completed commands on success, -errno otherwise.
5045 */
Tejun Heo79f97da2008-04-07 22:47:20 +09005046int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09005047{
5048 int nr_done = 0;
5049 u32 done_mask;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005050
5051 done_mask = ap->qc_active ^ qc_active;
5052
5053 if (unlikely(done_mask & qc_active)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07005054 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
5055 ap->qc_active, qc_active);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005056 return -EINVAL;
5057 }
5058
Jens Axboe43768182009-05-20 09:44:39 +02005059 while (done_mask) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09005060 struct ata_queued_cmd *qc;
Jens Axboe43768182009-05-20 09:44:39 +02005061 unsigned int tag = __ffs(done_mask);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005062
Jens Axboe43768182009-05-20 09:44:39 +02005063 qc = ata_qc_from_tag(ap, tag);
5064 if (qc) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09005065 ata_qc_complete(qc);
5066 nr_done++;
5067 }
Jens Axboe43768182009-05-20 09:44:39 +02005068 done_mask &= ~(1 << tag);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005069 }
5070
5071 return nr_done;
5072}
5073
Linus Torvalds1da177e2005-04-16 15:20:36 -07005074/**
5075 * ata_qc_issue - issue taskfile to device
5076 * @qc: command to issue to device
5077 *
5078 * Prepare an ATA command to submission to device.
5079 * This includes mapping the data into a DMA-able
5080 * area, filling in the S/G table, and finally
5081 * writing the taskfile to hardware, starting the command.
5082 *
5083 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005084 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005085 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09005086void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005087{
5088 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005089 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09005090 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005091
Tejun Heodedaf2b2006-05-15 21:03:43 +09005092 /* Make sure only one non-NCQ command is outstanding. The
5093 * check is skipped for old EH because it reuses active qc to
5094 * request ATAPI sense.
5095 */
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005096 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09005097
Tejun Heo1973a022007-12-05 10:36:13 +09005098 if (ata_is_ncq(prot)) {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005099 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09005100
5101 if (!link->sactive)
5102 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005103 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005104 } else {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005105 WARN_ON_ONCE(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09005106
5107 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005108 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005109 }
5110
Tejun Heoe4a70e72006-03-31 20:36:47 +09005111 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005112 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005113
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005114 /*
5115 * We guarantee to LLDs that they will have at least one
Tejun Heof92a2632007-12-05 16:43:10 +09005116 * non-zero sg if the command is a data command.
5117 */
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005118 if (WARN_ON_ONCE(ata_is_data(prot) &&
5119 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5120 goto sys_err;
Tejun Heof92a2632007-12-05 16:43:10 +09005121
Tejun Heo405e66b2007-11-27 19:28:53 +09005122 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09005123 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09005124 if (ata_sg_setup(qc))
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005125 goto sys_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005126
Tejun Heocf480622008-01-24 00:05:14 +09005127 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09005128 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09005129 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005130 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5131 ata_link_abort(link);
5132 return;
5133 }
5134
Linus Torvalds1da177e2005-04-16 15:20:36 -07005135 ap->ops->qc_prep(qc);
5136
Tejun Heo8e0e6942006-03-31 20:41:11 +09005137 qc->err_mask |= ap->ops->qc_issue(qc);
5138 if (unlikely(qc->err_mask))
5139 goto err;
5140 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005141
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005142sys_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09005143 qc->err_mask |= AC_ERR_SYSTEM;
5144err:
5145 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005146}
5147
5148/**
Tejun Heo34bf2172006-05-15 20:57:46 +09005149 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09005150 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09005151 *
Tejun Heo936fd732007-08-06 18:36:23 +09005152 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09005153 *
5154 * LOCKING:
5155 * None.
5156 *
5157 * RETURNS:
5158 * 1 if SCRs are accessible, 0 otherwise.
5159 */
Tejun Heo936fd732007-08-06 18:36:23 +09005160int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005161{
Tejun Heo936fd732007-08-06 18:36:23 +09005162 struct ata_port *ap = link->ap;
5163
Tejun Heoa16abc02007-05-21 18:33:47 +02005164 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005165}
5166
5167/**
5168 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005169 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005170 * @reg: SCR to read
5171 * @val: Place to store read value
5172 *
Tejun Heo936fd732007-08-06 18:36:23 +09005173 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a32007-09-23 13:19:54 +09005174 * guaranteed to succeed if @link is ap->link, the cable type of
5175 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005176 *
5177 * LOCKING:
Tejun Heo633273a32007-09-23 13:19:54 +09005178 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005179 *
5180 * RETURNS:
5181 * 0 on success, negative errno on failure.
5182 */
Tejun Heo936fd732007-08-06 18:36:23 +09005183int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005184{
Tejun Heo633273a32007-09-23 13:19:54 +09005185 if (ata_is_host_link(link)) {
Tejun Heo633273a32007-09-23 13:19:54 +09005186 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005187 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a32007-09-23 13:19:54 +09005188 return -EOPNOTSUPP;
5189 }
5190
5191 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005192}
5193
5194/**
5195 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005196 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005197 * @reg: SCR to write
5198 * @val: value to write
5199 *
Tejun Heo936fd732007-08-06 18:36:23 +09005200 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a32007-09-23 13:19:54 +09005201 * guaranteed to succeed if @link is ap->link, the cable type of
5202 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005203 *
5204 * LOCKING:
Tejun Heo633273a32007-09-23 13:19:54 +09005205 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005206 *
5207 * RETURNS:
5208 * 0 on success, negative errno on failure.
5209 */
Tejun Heo936fd732007-08-06 18:36:23 +09005210int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005211{
Tejun Heo633273a32007-09-23 13:19:54 +09005212 if (ata_is_host_link(link)) {
Tejun Heo633273a32007-09-23 13:19:54 +09005213 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005214 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a32007-09-23 13:19:54 +09005215 return -EOPNOTSUPP;
5216 }
5217
5218 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005219}
5220
5221/**
5222 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005223 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005224 * @reg: SCR to write
5225 * @val: value to write
5226 *
5227 * This function is identical to sata_scr_write() except that this
5228 * function performs flush after writing to the register.
5229 *
5230 * LOCKING:
Tejun Heo633273a32007-09-23 13:19:54 +09005231 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005232 *
5233 * RETURNS:
5234 * 0 on success, negative errno on failure.
5235 */
Tejun Heo936fd732007-08-06 18:36:23 +09005236int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005237{
Tejun Heo633273a32007-09-23 13:19:54 +09005238 if (ata_is_host_link(link)) {
Tejun Heo633273a32007-09-23 13:19:54 +09005239 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005240
Tejun Heo633273a32007-09-23 13:19:54 +09005241 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005242 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a32007-09-23 13:19:54 +09005243 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005244 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a32007-09-23 13:19:54 +09005245 return rc;
5246 }
5247 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005248 }
Tejun Heo633273a32007-09-23 13:19:54 +09005249
5250 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005251}
5252
5253/**
Tejun Heob1c72912008-07-31 17:02:43 +09005254 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005255 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005256 *
Tejun Heo936fd732007-08-06 18:36:23 +09005257 * Test whether @link is online. Note that this function returns
5258 * 0 if online status of @link cannot be obtained, so
5259 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005260 *
5261 * LOCKING:
5262 * None.
5263 *
5264 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005265 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005266 */
Tejun Heob1c72912008-07-31 17:02:43 +09005267bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005268{
5269 u32 sstatus;
5270
Tejun Heo936fd732007-08-06 18:36:23 +09005271 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005272 ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005273 return true;
5274 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005275}
5276
5277/**
Tejun Heob1c72912008-07-31 17:02:43 +09005278 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005279 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005280 *
Tejun Heo936fd732007-08-06 18:36:23 +09005281 * Test whether @link is offline. Note that this function
5282 * returns 0 if offline status of @link cannot be obtained, so
5283 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005284 *
5285 * LOCKING:
5286 * None.
5287 *
5288 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005289 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005290 */
Tejun Heob1c72912008-07-31 17:02:43 +09005291bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005292{
5293 u32 sstatus;
5294
Tejun Heo936fd732007-08-06 18:36:23 +09005295 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005296 !ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005297 return true;
5298 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005299}
Edward Falk0baab862005-06-02 18:17:13 -04005300
Tejun Heob1c72912008-07-31 17:02:43 +09005301/**
5302 * ata_link_online - test whether the given link is online
5303 * @link: ATA link to test
5304 *
5305 * Test whether @link is online. This is identical to
5306 * ata_phys_link_online() when there's no slave link. When
5307 * there's a slave link, this function should only be called on
5308 * the master link and will return true if any of M/S links is
5309 * online.
5310 *
5311 * LOCKING:
5312 * None.
5313 *
5314 * RETURNS:
5315 * True if the port online status is available and online.
5316 */
5317bool ata_link_online(struct ata_link *link)
5318{
5319 struct ata_link *slave = link->ap->slave_link;
5320
5321 WARN_ON(link == slave); /* shouldn't be called on slave link */
5322
5323 return ata_phys_link_online(link) ||
5324 (slave && ata_phys_link_online(slave));
5325}
5326
5327/**
5328 * ata_link_offline - test whether the given link is offline
5329 * @link: ATA link to test
5330 *
5331 * Test whether @link is offline. This is identical to
5332 * ata_phys_link_offline() when there's no slave link. When
5333 * there's a slave link, this function should only be called on
5334 * the master link and will return true if both M/S links are
5335 * offline.
5336 *
5337 * LOCKING:
5338 * None.
5339 *
5340 * RETURNS:
5341 * True if the port offline status is available and offline.
5342 */
5343bool ata_link_offline(struct ata_link *link)
5344{
5345 struct ata_link *slave = link->ap->slave_link;
5346
5347 WARN_ON(link == slave); /* shouldn't be called on slave link */
5348
5349 return ata_phys_link_offline(link) &&
5350 (!slave || ata_phys_link_offline(slave));
5351}
5352
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005353#ifdef CONFIG_PM
Lin Ming5ef41082011-12-05 09:20:27 +08005354static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
Jeff Garzikcca39742006-08-24 03:19:22 -04005355 unsigned int action, unsigned int ehi_flags,
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005356 int *async)
Tejun Heo500530f2006-07-03 16:07:27 +09005357{
Lin Ming5ef41082011-12-05 09:20:27 +08005358 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005359 unsigned long flags;
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005360 int rc = 0;
Tejun Heo500530f2006-07-03 16:07:27 +09005361
Lin Ming5ef41082011-12-05 09:20:27 +08005362 /* Previous resume operation might still be in
5363 * progress. Wait for PM_PENDING to clear.
5364 */
5365 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005366 if (async) {
5367 *async = -EAGAIN;
5368 return 0;
5369 }
Lin Ming5ef41082011-12-05 09:20:27 +08005370 ata_port_wait_eh(ap);
5371 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
Tejun Heo500530f2006-07-03 16:07:27 +09005372 }
5373
Lin Ming5ef41082011-12-05 09:20:27 +08005374 /* request PM ops to EH */
5375 spin_lock_irqsave(ap->lock, flags);
5376
5377 ap->pm_mesg = mesg;
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005378 if (async)
5379 ap->pm_result = async;
5380 else
Lin Ming5ef41082011-12-05 09:20:27 +08005381 ap->pm_result = &rc;
Lin Ming5ef41082011-12-05 09:20:27 +08005382
5383 ap->pflags |= ATA_PFLAG_PM_PENDING;
5384 ata_for_each_link(link, ap, HOST_FIRST) {
5385 link->eh_info.action |= action;
5386 link->eh_info.flags |= ehi_flags;
5387 }
5388
5389 ata_port_schedule_eh(ap);
5390
5391 spin_unlock_irqrestore(ap->lock, flags);
5392
5393 /* wait and check result */
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005394 if (!async) {
Lin Ming5ef41082011-12-05 09:20:27 +08005395 ata_port_wait_eh(ap);
5396 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5397 }
5398
5399 return rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005400}
5401
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005402static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
Lin Ming5ef41082011-12-05 09:20:27 +08005403{
Lin Ming33574d62011-12-22 14:50:49 +08005404 /*
5405 * On some hardware, device fails to respond after spun down
5406 * for suspend. As the device won't be used before being
5407 * resumed, we don't need to touch the device. Ask EH to skip
5408 * the usual stuff and proceed directly to suspend.
5409 *
5410 * http://thread.gmane.org/gmane.linux.ide/46764
5411 */
Aaron Luf5e6d0d2013-01-25 14:32:25 +08005412 unsigned int ehi_flags = ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY |
5413 ATA_EHI_NO_RECOVERY;
5414 return ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
Lin Ming5ef41082011-12-05 09:20:27 +08005415}
5416
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005417static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
5418{
5419 struct ata_port *ap = to_ata_port(dev);
5420
5421 return __ata_port_suspend_common(ap, mesg, NULL);
5422}
5423
Lin Ming5ef41082011-12-05 09:20:27 +08005424static int ata_port_suspend(struct device *dev)
5425{
5426 if (pm_runtime_suspended(dev))
5427 return 0;
5428
Lin Ming33574d62011-12-22 14:50:49 +08005429 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5430}
5431
5432static int ata_port_do_freeze(struct device *dev)
5433{
5434 if (pm_runtime_suspended(dev))
Aaron Luf5e6d0d2013-01-25 14:32:25 +08005435 return 0;
Lin Ming33574d62011-12-22 14:50:49 +08005436
5437 return ata_port_suspend_common(dev, PMSG_FREEZE);
5438}
5439
5440static int ata_port_poweroff(struct device *dev)
5441{
Lin Ming33574d62011-12-22 14:50:49 +08005442 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
Lin Ming5ef41082011-12-05 09:20:27 +08005443}
5444
Aaron Lua7ff60d2013-01-25 14:29:35 +08005445static int __ata_port_resume_common(struct ata_port *ap, pm_message_t mesg,
5446 int *async)
Lin Ming5ef41082011-12-05 09:20:27 +08005447{
Lin Ming5ef41082011-12-05 09:20:27 +08005448 int rc;
5449
Aaron Lua7ff60d2013-01-25 14:29:35 +08005450 rc = ata_port_request_pm(ap, mesg, ATA_EH_RESET,
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005451 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
Lin Ming5ef41082011-12-05 09:20:27 +08005452 return rc;
5453}
5454
Aaron Lua7ff60d2013-01-25 14:29:35 +08005455static int ata_port_resume_common(struct device *dev, pm_message_t mesg)
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005456{
5457 struct ata_port *ap = to_ata_port(dev);
5458
Aaron Lua7ff60d2013-01-25 14:29:35 +08005459 return __ata_port_resume_common(ap, mesg, NULL);
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005460}
5461
Lin Minge90b1e52011-12-22 14:50:48 +08005462static int ata_port_resume(struct device *dev)
5463{
5464 int rc;
5465
Aaron Lua7ff60d2013-01-25 14:29:35 +08005466 rc = ata_port_resume_common(dev, PMSG_RESUME);
Lin Minge90b1e52011-12-22 14:50:48 +08005467 if (!rc) {
5468 pm_runtime_disable(dev);
5469 pm_runtime_set_active(dev);
5470 pm_runtime_enable(dev);
5471 }
5472
5473 return rc;
5474}
5475
Aaron Lu7e15e9b2013-01-15 17:21:04 +08005476/*
5477 * For ODDs, the upper layer will poll for media change every few seconds,
5478 * which will make it enter and leave suspend state every few seconds. And
5479 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5480 * is very little and the ODD may malfunction after constantly being reset.
5481 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5482 * ODD is attached to the port.
5483 */
Lin Ming9ee4f392011-12-05 09:20:28 +08005484static int ata_port_runtime_idle(struct device *dev)
5485{
Aaron Lu7e15e9b2013-01-15 17:21:04 +08005486 struct ata_port *ap = to_ata_port(dev);
5487 struct ata_link *link;
5488 struct ata_device *adev;
5489
5490 ata_for_each_link(link, ap, HOST_FIRST) {
5491 ata_for_each_dev(adev, link, ENABLED)
5492 if (adev->class == ATA_DEV_ATAPI &&
5493 !zpodd_dev_enabled(adev))
5494 return -EBUSY;
5495 }
5496
Rafael J. Wysocki45f0a852013-06-03 21:49:52 +02005497 return 0;
Lin Ming9ee4f392011-12-05 09:20:28 +08005498}
5499
Aaron Lua7ff60d2013-01-25 14:29:35 +08005500static int ata_port_runtime_suspend(struct device *dev)
5501{
5502 return ata_port_suspend_common(dev, PMSG_AUTO_SUSPEND);
5503}
5504
5505static int ata_port_runtime_resume(struct device *dev)
5506{
5507 return ata_port_resume_common(dev, PMSG_AUTO_RESUME);
5508}
5509
Lin Ming5ef41082011-12-05 09:20:27 +08005510static const struct dev_pm_ops ata_port_pm_ops = {
5511 .suspend = ata_port_suspend,
5512 .resume = ata_port_resume,
Lin Ming33574d62011-12-22 14:50:49 +08005513 .freeze = ata_port_do_freeze,
5514 .thaw = ata_port_resume,
5515 .poweroff = ata_port_poweroff,
5516 .restore = ata_port_resume,
Lin Ming9ee4f392011-12-05 09:20:28 +08005517
Aaron Lua7ff60d2013-01-25 14:29:35 +08005518 .runtime_suspend = ata_port_runtime_suspend,
5519 .runtime_resume = ata_port_runtime_resume,
Lin Ming9ee4f392011-12-05 09:20:28 +08005520 .runtime_idle = ata_port_runtime_idle,
Lin Ming5ef41082011-12-05 09:20:27 +08005521};
5522
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005523/* sas ports don't participate in pm runtime management of ata_ports,
5524 * and need to resume ata devices at the domain level, not the per-port
5525 * level. sas suspend/resume is async to allow parallel port recovery
5526 * since sas has multiple ata_port instances per Scsi_Host.
5527 */
5528int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
5529{
5530 return __ata_port_suspend_common(ap, PMSG_SUSPEND, async);
5531}
5532EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
5533
5534int ata_sas_port_async_resume(struct ata_port *ap, int *async)
5535{
Aaron Lua7ff60d2013-01-25 14:29:35 +08005536 return __ata_port_resume_common(ap, PMSG_RESUME, async);
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005537}
5538EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
5539
5540
Tejun Heo500530f2006-07-03 16:07:27 +09005541/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005542 * ata_host_suspend - suspend host
5543 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005544 * @mesg: PM message
5545 *
Lin Ming5ef41082011-12-05 09:20:27 +08005546 * Suspend @host. Actual operation is performed by port suspend.
Tejun Heo500530f2006-07-03 16:07:27 +09005547 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005548int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005549{
Lin Ming5ef41082011-12-05 09:20:27 +08005550 host->dev->power.power_state = mesg;
5551 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09005552}
5553
5554/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005555 * ata_host_resume - resume host
5556 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005557 *
Lin Ming5ef41082011-12-05 09:20:27 +08005558 * Resume @host. Actual operation is performed by port resume.
Tejun Heo500530f2006-07-03 16:07:27 +09005559 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005560void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005561{
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005562 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005563}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005564#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005565
Lin Ming5ef41082011-12-05 09:20:27 +08005566struct device_type ata_port_type = {
5567 .name = "ata_port",
5568#ifdef CONFIG_PM
5569 .pm = &ata_port_pm_ops,
5570#endif
5571};
5572
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005573/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005574 * ata_dev_init - Initialize an ata_device structure
5575 * @dev: Device structure to initialize
5576 *
5577 * Initialize @dev in preparation for probing.
5578 *
5579 * LOCKING:
5580 * Inherited from caller.
5581 */
5582void ata_dev_init(struct ata_device *dev)
5583{
Tejun Heob1c72912008-07-31 17:02:43 +09005584 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005585 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005586 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005587
Tejun Heob1c72912008-07-31 17:02:43 +09005588 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005589 link->sata_spd_limit = link->hw_sata_spd_limit;
5590 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005591
Tejun Heo72fa4b72006-05-31 18:27:32 +09005592 /* High bits of dev->flags are used to record warm plug
5593 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005594 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005595 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005596 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005597 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005598 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005599 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005600
Tejun Heo99cf6102009-01-29 20:31:32 +09005601 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5602 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005603 dev->pio_mask = UINT_MAX;
5604 dev->mwdma_mask = UINT_MAX;
5605 dev->udma_mask = UINT_MAX;
5606}
5607
5608/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005609 * ata_link_init - Initialize an ata_link structure
5610 * @ap: ATA port link is attached to
5611 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005612 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005613 *
5614 * Initialize @link.
5615 *
5616 * LOCKING:
5617 * Kernel thread context (may sleep)
5618 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005619void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005620{
5621 int i;
5622
5623 /* clear everything except for devices */
Gwendal Grignoud9027472010-05-25 12:31:38 -07005624 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5625 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005626
5627 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005628 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005629 link->active_tag = ATA_TAG_POISON;
5630 link->hw_sata_spd_limit = UINT_MAX;
5631
5632 /* can't use iterator, ap isn't initialized yet */
5633 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5634 struct ata_device *dev = &link->device[i];
5635
5636 dev->link = link;
5637 dev->devno = dev - link->device;
Tejun Heo110f66d2009-09-16 04:17:28 +09005638#ifdef CONFIG_ATA_ACPI
5639 dev->gtf_filter = ata_acpi_gtf_filter;
5640#endif
Tejun Heo4fb37a22007-08-06 18:36:23 +09005641 ata_dev_init(dev);
5642 }
5643}
5644
5645/**
5646 * sata_link_init_spd - Initialize link->sata_spd_limit
5647 * @link: Link to configure sata_spd_limit for
5648 *
5649 * Initialize @link->[hw_]sata_spd_limit to the currently
5650 * configured value.
5651 *
5652 * LOCKING:
5653 * Kernel thread context (may sleep).
5654 *
5655 * RETURNS:
5656 * 0 on success, -errno on failure.
5657 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005658int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005659{
Tejun Heo33267322008-02-13 09:15:09 +09005660 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005661 int rc;
5662
Tejun Heod127ea72008-07-31 16:09:34 +09005663 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005664 if (rc)
5665 return rc;
5666
Tejun Heod127ea72008-07-31 16:09:34 +09005667 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005668 if (spd)
5669 link->hw_sata_spd_limit &= (1 << spd) - 1;
5670
Tejun Heo05944bd2008-08-13 20:19:09 +09005671 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005672
Tejun Heo4fb37a22007-08-06 18:36:23 +09005673 link->sata_spd_limit = link->hw_sata_spd_limit;
5674
5675 return 0;
5676}
5677
5678/**
Tejun Heof3187192007-04-17 23:44:07 +09005679 * ata_port_alloc - allocate and initialize basic ATA port resources
5680 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005681 *
Tejun Heof3187192007-04-17 23:44:07 +09005682 * Allocate and initialize basic ATA port resources.
5683 *
5684 * RETURNS:
5685 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005686 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005687 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005688 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005689 */
Tejun Heof3187192007-04-17 23:44:07 +09005690struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005691{
Tejun Heof3187192007-04-17 23:44:07 +09005692 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005693
Tejun Heof3187192007-04-17 23:44:07 +09005694 DPRINTK("ENTER\n");
5695
5696 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5697 if (!ap)
5698 return NULL;
Jeff Garzik4fca3772011-02-15 01:13:24 -05005699
Maxime Bizon7b3a24c2011-03-16 14:58:32 +01005700 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
Jeff Garzikcca39742006-08-24 03:19:22 -04005701 ap->lock = &host->lock;
Tejun Heof3187192007-04-17 23:44:07 +09005702 ap->print_id = -1;
David Milburne628dc92013-05-14 13:48:40 -05005703 ap->local_port_no = -1;
Jeff Garzikcca39742006-08-24 03:19:22 -04005704 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005705 ap->dev = host->dev;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005706
5707#if defined(ATA_VERBOSE_DEBUG)
5708 /* turn on all debugging levels */
5709 ap->msg_enable = 0x00FF;
5710#elif defined(ATA_DEBUG)
5711 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 +09005712#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005713 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005714#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005715
Tejun Heoad72cf92010-07-02 10:03:52 +02005716 mutex_init(&ap->scsi_scan_mutex);
David Howells65f27f32006-11-22 14:55:48 +00005717 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5718 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005719 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005720 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005721 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005722 init_timer_deferrable(&ap->fastdrain_timer);
5723 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5724 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005725
Tejun Heo838df622006-05-15 20:57:44 +09005726 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005727
Tejun Heo89898052007-08-06 18:36:23 +09005728 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005729
5730#ifdef ATA_IRQ_TRAP
5731 ap->stats.unhandled_irq = 1;
5732 ap->stats.idle_irq = 1;
5733#endif
Tejun Heo270390e2010-05-10 21:41:35 +02005734 ata_sff_port_init(ap);
5735
Linus Torvalds1da177e2005-04-16 15:20:36 -07005736 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005737}
5738
Tejun Heof0d36ef2007-01-20 16:00:28 +09005739static void ata_host_release(struct device *gendev, void *res)
5740{
5741 struct ata_host *host = dev_get_drvdata(gendev);
5742 int i;
5743
5744 for (i = 0; i < host->n_ports; i++) {
5745 struct ata_port *ap = host->ports[i];
5746
Tejun Heoecef7252007-04-17 23:44:06 +09005747 if (!ap)
5748 continue;
5749
Tejun Heo49114872007-04-17 23:44:06 +09005750 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005751 scsi_host_put(ap->scsi_host);
5752
Tejun Heo633273a32007-09-23 13:19:54 +09005753 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005754 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005755 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005756 host->ports[i] = NULL;
5757 }
5758
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005759 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005760}
5761
Linus Torvalds1da177e2005-04-16 15:20:36 -07005762/**
Tejun Heof3187192007-04-17 23:44:07 +09005763 * ata_host_alloc - allocate and init basic ATA host resources
5764 * @dev: generic device this host is associated with
5765 * @max_ports: maximum number of ATA ports associated with this host
5766 *
5767 * Allocate and initialize basic ATA host resources. LLD calls
5768 * this function to allocate a host, initializes it fully and
5769 * attaches it using ata_host_register().
5770 *
5771 * @max_ports ports are allocated and host->n_ports is
5772 * initialized to @max_ports. The caller is allowed to decrease
5773 * host->n_ports before calling ata_host_register(). The unused
5774 * ports will be automatically freed on registration.
5775 *
5776 * RETURNS:
5777 * Allocate ATA host on success, NULL on failure.
5778 *
5779 * LOCKING:
5780 * Inherited from calling layer (may sleep).
5781 */
5782struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5783{
5784 struct ata_host *host;
5785 size_t sz;
5786 int i;
5787
5788 DPRINTK("ENTER\n");
5789
5790 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5791 return NULL;
5792
5793 /* alloc a container for our list of ATA ports (buses) */
5794 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5795 /* alloc a container for our list of ATA ports (buses) */
5796 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5797 if (!host)
5798 goto err_out;
5799
5800 devres_add(dev, host);
5801 dev_set_drvdata(dev, host);
5802
5803 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02005804 mutex_init(&host->eh_mutex);
Tejun Heof3187192007-04-17 23:44:07 +09005805 host->dev = dev;
5806 host->n_ports = max_ports;
5807
5808 /* allocate ports bound to this host */
5809 for (i = 0; i < max_ports; i++) {
5810 struct ata_port *ap;
5811
5812 ap = ata_port_alloc(host);
5813 if (!ap)
5814 goto err_out;
5815
5816 ap->port_no = i;
5817 host->ports[i] = ap;
5818 }
5819
5820 devres_remove_group(dev, NULL);
5821 return host;
5822
5823 err_out:
5824 devres_release_group(dev, NULL);
5825 return NULL;
5826}
5827
5828/**
Tejun Heof5cda252007-04-17 23:44:07 +09005829 * ata_host_alloc_pinfo - alloc host and init with port_info array
5830 * @dev: generic device this host is associated with
5831 * @ppi: array of ATA port_info to initialize host with
5832 * @n_ports: number of ATA ports attached to this host
5833 *
5834 * Allocate ATA host and initialize with info from @ppi. If NULL
5835 * terminated, @ppi may contain fewer entries than @n_ports. The
5836 * last entry will be used for the remaining ports.
5837 *
5838 * RETURNS:
5839 * Allocate ATA host on success, NULL on failure.
5840 *
5841 * LOCKING:
5842 * Inherited from calling layer (may sleep).
5843 */
5844struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5845 const struct ata_port_info * const * ppi,
5846 int n_ports)
5847{
5848 const struct ata_port_info *pi;
5849 struct ata_host *host;
5850 int i, j;
5851
5852 host = ata_host_alloc(dev, n_ports);
5853 if (!host)
5854 return NULL;
5855
5856 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5857 struct ata_port *ap = host->ports[i];
5858
5859 if (ppi[j])
5860 pi = ppi[j++];
5861
5862 ap->pio_mask = pi->pio_mask;
5863 ap->mwdma_mask = pi->mwdma_mask;
5864 ap->udma_mask = pi->udma_mask;
5865 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005866 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005867 ap->ops = pi->port_ops;
5868
5869 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5870 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005871 }
5872
5873 return host;
5874}
5875
Tejun Heob1c72912008-07-31 17:02:43 +09005876/**
5877 * ata_slave_link_init - initialize slave link
5878 * @ap: port to initialize slave link for
5879 *
5880 * Create and initialize slave link for @ap. This enables slave
5881 * link handling on the port.
5882 *
5883 * In libata, a port contains links and a link contains devices.
5884 * There is single host link but if a PMP is attached to it,
5885 * there can be multiple fan-out links. On SATA, there's usually
5886 * a single device connected to a link but PATA and SATA
5887 * controllers emulating TF based interface can have two - master
5888 * and slave.
5889 *
5890 * However, there are a few controllers which don't fit into this
5891 * abstraction too well - SATA controllers which emulate TF
5892 * interface with both master and slave devices but also have
5893 * separate SCR register sets for each device. These controllers
5894 * need separate links for physical link handling
5895 * (e.g. onlineness, link speed) but should be treated like a
5896 * traditional M/S controller for everything else (e.g. command
5897 * issue, softreset).
5898 *
5899 * slave_link is libata's way of handling this class of
5900 * controllers without impacting core layer too much. For
5901 * anything other than physical link handling, the default host
5902 * link is used for both master and slave. For physical link
5903 * handling, separate @ap->slave_link is used. All dirty details
5904 * are implemented inside libata core layer. From LLD's POV, the
5905 * only difference is that prereset, hardreset and postreset are
5906 * called once more for the slave link, so the reset sequence
5907 * looks like the following.
5908 *
5909 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5910 * softreset(M) -> postreset(M) -> postreset(S)
5911 *
5912 * Note that softreset is called only for the master. Softreset
5913 * resets both M/S by definition, so SRST on master should handle
5914 * both (the standard method will work just fine).
5915 *
5916 * LOCKING:
5917 * Should be called before host is registered.
5918 *
5919 * RETURNS:
5920 * 0 on success, -errno on failure.
5921 */
5922int ata_slave_link_init(struct ata_port *ap)
5923{
5924 struct ata_link *link;
5925
5926 WARN_ON(ap->slave_link);
5927 WARN_ON(ap->flags & ATA_FLAG_PMP);
5928
5929 link = kzalloc(sizeof(*link), GFP_KERNEL);
5930 if (!link)
5931 return -ENOMEM;
5932
5933 ata_link_init(ap, link, 1);
5934 ap->slave_link = link;
5935 return 0;
5936}
5937
Tejun Heo32ebbc02007-11-08 13:09:00 +09005938static void ata_host_stop(struct device *gendev, void *res)
5939{
5940 struct ata_host *host = dev_get_drvdata(gendev);
5941 int i;
5942
5943 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5944
5945 for (i = 0; i < host->n_ports; i++) {
5946 struct ata_port *ap = host->ports[i];
5947
5948 if (ap->ops->port_stop)
5949 ap->ops->port_stop(ap);
5950 }
5951
5952 if (host->ops->host_stop)
5953 host->ops->host_stop(host);
5954}
5955
Tejun Heof5cda252007-04-17 23:44:07 +09005956/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005957 * ata_finalize_port_ops - finalize ata_port_operations
5958 * @ops: ata_port_operations to finalize
5959 *
5960 * An ata_port_operations can inherit from another ops and that
5961 * ops can again inherit from another. This can go on as many
5962 * times as necessary as long as there is no loop in the
5963 * inheritance chain.
5964 *
5965 * Ops tables are finalized when the host is started. NULL or
5966 * unspecified entries are inherited from the closet ancestor
5967 * which has the method and the entry is populated with it.
5968 * After finalization, the ops table directly points to all the
5969 * methods and ->inherits is no longer necessary and cleared.
5970 *
5971 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5972 *
5973 * LOCKING:
5974 * None.
5975 */
5976static void ata_finalize_port_ops(struct ata_port_operations *ops)
5977{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305978 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005979 const struct ata_port_operations *cur;
5980 void **begin = (void **)ops;
5981 void **end = (void **)&ops->inherits;
5982 void **pp;
5983
5984 if (!ops || !ops->inherits)
5985 return;
5986
5987 spin_lock(&lock);
5988
5989 for (cur = ops->inherits; cur; cur = cur->inherits) {
5990 void **inherit = (void **)cur;
5991
5992 for (pp = begin; pp < end; pp++, inherit++)
5993 if (!*pp)
5994 *pp = *inherit;
5995 }
5996
5997 for (pp = begin; pp < end; pp++)
5998 if (IS_ERR(*pp))
5999 *pp = NULL;
6000
6001 ops->inherits = NULL;
6002
6003 spin_unlock(&lock);
6004}
6005
6006/**
Tejun Heoecef7252007-04-17 23:44:06 +09006007 * ata_host_start - start and freeze ports of an ATA host
6008 * @host: ATA host to start ports for
6009 *
6010 * Start and then freeze ports of @host. Started status is
6011 * recorded in host->flags, so this function can be called
6012 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09006013 * once. If host->ops isn't initialized yet, its set to the
6014 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09006015 *
6016 * LOCKING:
6017 * Inherited from calling layer (may sleep).
6018 *
6019 * RETURNS:
6020 * 0 if all ports are started successfully, -errno otherwise.
6021 */
6022int ata_host_start(struct ata_host *host)
6023{
Tejun Heo32ebbc02007-11-08 13:09:00 +09006024 int have_stop = 0;
6025 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09006026 int i, rc;
6027
6028 if (host->flags & ATA_HOST_STARTED)
6029 return 0;
6030
Tejun Heo029cfd62008-03-25 12:22:49 +09006031 ata_finalize_port_ops(host->ops);
6032
Tejun Heoecef7252007-04-17 23:44:06 +09006033 for (i = 0; i < host->n_ports; i++) {
6034 struct ata_port *ap = host->ports[i];
6035
Tejun Heo029cfd62008-03-25 12:22:49 +09006036 ata_finalize_port_ops(ap->ops);
6037
Tejun Heof3187192007-04-17 23:44:07 +09006038 if (!host->ops && !ata_port_is_dummy(ap))
6039 host->ops = ap->ops;
6040
Tejun Heo32ebbc02007-11-08 13:09:00 +09006041 if (ap->ops->port_stop)
6042 have_stop = 1;
6043 }
6044
6045 if (host->ops->host_stop)
6046 have_stop = 1;
6047
6048 if (have_stop) {
6049 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6050 if (!start_dr)
6051 return -ENOMEM;
6052 }
6053
6054 for (i = 0; i < host->n_ports; i++) {
6055 struct ata_port *ap = host->ports[i];
6056
Tejun Heoecef7252007-04-17 23:44:06 +09006057 if (ap->ops->port_start) {
6058 rc = ap->ops->port_start(ap);
6059 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00006060 if (rc != -ENODEV)
Joe Perchesa44fec12011-04-15 15:51:58 -07006061 dev_err(host->dev,
6062 "failed to start port %d (errno=%d)\n",
6063 i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09006064 goto err_out;
6065 }
6066 }
Tejun Heoecef7252007-04-17 23:44:06 +09006067 ata_eh_freeze_port(ap);
6068 }
6069
Tejun Heo32ebbc02007-11-08 13:09:00 +09006070 if (start_dr)
6071 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09006072 host->flags |= ATA_HOST_STARTED;
6073 return 0;
6074
6075 err_out:
6076 while (--i >= 0) {
6077 struct ata_port *ap = host->ports[i];
6078
6079 if (ap->ops->port_stop)
6080 ap->ops->port_stop(ap);
6081 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09006082 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09006083 return rc;
6084}
6085
6086/**
Dan Williams8d8e7d132012-07-09 21:06:08 -07006087 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
Jeff Garzikcca39742006-08-24 03:19:22 -04006088 * @host: host to initialize
6089 * @dev: device host is attached to
Jeff Garzikcca39742006-08-24 03:19:22 -04006090 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05006091 *
Brian Kingb03732f2006-08-07 14:27:10 -05006092 */
Jeff Garzikcca39742006-08-24 03:19:22 -04006093void ata_host_init(struct ata_host *host, struct device *dev,
Dan Williams8d8e7d132012-07-09 21:06:08 -07006094 struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05006095{
Jeff Garzikcca39742006-08-24 03:19:22 -04006096 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02006097 mutex_init(&host->eh_mutex);
Jeff Garzikcca39742006-08-24 03:19:22 -04006098 host->dev = dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006099 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05006100}
6101
Dan Williams9508a662012-01-18 20:47:01 -08006102void __ata_port_probe(struct ata_port *ap)
6103{
6104 struct ata_eh_info *ehi = &ap->link.eh_info;
6105 unsigned long flags;
6106
6107 /* kick EH for boot probing */
6108 spin_lock_irqsave(ap->lock, flags);
6109
6110 ehi->probe_mask |= ATA_ALL_DEVICES;
6111 ehi->action |= ATA_EH_RESET;
6112 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6113
6114 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6115 ap->pflags |= ATA_PFLAG_LOADING;
6116 ata_port_schedule_eh(ap);
6117
6118 spin_unlock_irqrestore(ap->lock, flags);
6119}
6120
James Bottomley238c9cf2011-01-23 08:28:33 -06006121int ata_port_probe(struct ata_port *ap)
Arjan van de Ven79318052009-01-04 05:32:28 -08006122{
James Bottomley238c9cf2011-01-23 08:28:33 -06006123 int rc = 0;
Arjan van de Ven886ad092009-01-09 15:54:07 -08006124
Arjan van de Ven79318052009-01-04 05:32:28 -08006125 if (ap->ops->error_handler) {
Dan Williams9508a662012-01-18 20:47:01 -08006126 __ata_port_probe(ap);
Arjan van de Ven79318052009-01-04 05:32:28 -08006127 ata_port_wait_eh(ap);
6128 } else {
6129 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6130 rc = ata_bus_probe(ap);
6131 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Arjan van de Ven79318052009-01-04 05:32:28 -08006132 }
James Bottomley238c9cf2011-01-23 08:28:33 -06006133 return rc;
6134}
6135
6136
6137static void async_port_probe(void *data, async_cookie_t cookie)
6138{
6139 struct ata_port *ap = data;
Jeff Garzik4fca3772011-02-15 01:13:24 -05006140
James Bottomley238c9cf2011-01-23 08:28:33 -06006141 /*
6142 * If we're not allowed to scan this host in parallel,
6143 * we need to wait until all previous scans have completed
6144 * before going further.
6145 * Jeff Garzik says this is only within a controller, so we
6146 * don't need to wait for port 0, only for later ports.
6147 */
6148 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6149 async_synchronize_cookie(cookie);
6150
6151 (void)ata_port_probe(ap);
Arjan van de Venf29d3b22009-01-05 15:07:07 -08006152
6153 /* in order to keep device order, we need to synchronize at this point */
6154 async_synchronize_cookie(cookie);
6155
6156 ata_scsi_scan_host(ap, 1);
Arjan van de Ven79318052009-01-04 05:32:28 -08006157}
James Bottomley238c9cf2011-01-23 08:28:33 -06006158
Brian Kingb03732f2006-08-07 14:27:10 -05006159/**
Tejun Heof3187192007-04-17 23:44:07 +09006160 * ata_host_register - register initialized ATA host
6161 * @host: ATA host to register
6162 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04006163 *
Tejun Heof3187192007-04-17 23:44:07 +09006164 * Register initialized ATA host. @host is allocated using
6165 * ata_host_alloc() and fully initialized by LLD. This function
6166 * starts ports, registers @host with ATA and SCSI layers and
6167 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006168 *
6169 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006170 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006171 *
6172 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09006173 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006174 */
Tejun Heof3187192007-04-17 23:44:07 +09006175int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006176{
Tejun Heof3187192007-04-17 23:44:07 +09006177 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006178
Tejun Heof3187192007-04-17 23:44:07 +09006179 /* host must have been started */
6180 if (!(host->flags & ATA_HOST_STARTED)) {
Joe Perchesa44fec12011-04-15 15:51:58 -07006181 dev_err(host->dev, "BUG: trying to register unstarted host\n");
Tejun Heof3187192007-04-17 23:44:07 +09006182 WARN_ON(1);
6183 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01006184 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09006185
Tejun Heof3187192007-04-17 23:44:07 +09006186 /* Blow away unused ports. This happens when LLD can't
6187 * determine the exact number of ports to allocate at
6188 * allocation time.
6189 */
6190 for (i = host->n_ports; host->ports[i]; i++)
6191 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006192
Tejun Heof3187192007-04-17 23:44:07 +09006193 /* give ports names and add SCSI hosts */
David Milburne628dc92013-05-14 13:48:40 -05006194 for (i = 0; i < host->n_ports; i++) {
Dan Williams85d67252012-03-10 23:28:46 -08006195 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
David Milburne628dc92013-05-14 13:48:40 -05006196 host->ports[i]->local_port_no = i + 1;
6197 }
Jeff Garzik4fca3772011-02-15 01:13:24 -05006198
Gwendal Grignoud9027472010-05-25 12:31:38 -07006199 /* Create associated sysfs transport objects */
6200 for (i = 0; i < host->n_ports; i++) {
6201 rc = ata_tport_add(host->dev,host->ports[i]);
6202 if (rc) {
6203 goto err_tadd;
6204 }
6205 }
6206
Tejun Heof3187192007-04-17 23:44:07 +09006207 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09006208 if (rc)
Gwendal Grignoud9027472010-05-25 12:31:38 -07006209 goto err_tadd;
Tejun Heoecef7252007-04-17 23:44:06 +09006210
Tejun Heof3187192007-04-17 23:44:07 +09006211 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04006212 for (i = 0; i < host->n_ports; i++) {
6213 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09006214 unsigned long xfer_mask;
6215
6216 /* set SATA cable type if still unset */
6217 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6218 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006219
Tejun Heo5a04bf42006-05-31 18:27:38 +09006220 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09006221 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09006222 if (ap->slave_link)
6223 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09006224
Tejun Heocbcdd872007-08-18 13:14:55 +09006225 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09006226 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6227 ap->udma_mask);
6228
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006229 if (!ata_port_is_dummy(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07006230 ata_port_info(ap, "%cATA max %s %s\n",
6231 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6232 ata_mode_string(xfer_mask),
6233 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006234 ata_ehi_clear_desc(&ap->link.eh_info);
6235 } else
Joe Perchesa9a79df2011-04-15 15:51:59 -07006236 ata_port_info(ap, "DUMMY\n");
Tejun Heof3187192007-04-17 23:44:07 +09006237 }
6238
Vegard Nossumf6005352009-04-08 18:19:39 +02006239 /* perform each probe asynchronously */
Tejun Heof3187192007-04-17 23:44:07 +09006240 for (i = 0; i < host->n_ports; i++) {
6241 struct ata_port *ap = host->ports[i];
Arjan van de Ven79318052009-01-04 05:32:28 -08006242 async_schedule(async_port_probe, ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006243 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006244
Tejun Heof3187192007-04-17 23:44:07 +09006245 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006246
6247 err_tadd:
6248 while (--i >= 0) {
6249 ata_tport_delete(host->ports[i]);
6250 }
6251 return rc;
6252
Tejun Heof3187192007-04-17 23:44:07 +09006253}
6254
6255/**
Tejun Heof5cda252007-04-17 23:44:07 +09006256 * ata_host_activate - start host, request IRQ and register it
6257 * @host: target ATA host
6258 * @irq: IRQ to request
6259 * @irq_handler: irq_handler used when requesting IRQ
6260 * @irq_flags: irq_flags used when requesting IRQ
6261 * @sht: scsi_host_template to use when registering the host
6262 *
6263 * After allocating an ATA host and initializing it, most libata
6264 * LLDs perform three steps to activate the host - start host,
6265 * request IRQ and register it. This helper takes necessasry
6266 * arguments and performs the three steps in one go.
6267 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006268 * An invalid IRQ skips the IRQ registration and expects the host to
6269 * have set polling mode on the port. In this case, @irq_handler
6270 * should be NULL.
6271 *
Tejun Heof5cda252007-04-17 23:44:07 +09006272 * LOCKING:
6273 * Inherited from calling layer (may sleep).
6274 *
6275 * RETURNS:
6276 * 0 on success, -errno otherwise.
6277 */
6278int ata_host_activate(struct ata_host *host, int irq,
6279 irq_handler_t irq_handler, unsigned long irq_flags,
6280 struct scsi_host_template *sht)
6281{
Tejun Heocbcdd872007-08-18 13:14:55 +09006282 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006283
6284 rc = ata_host_start(host);
6285 if (rc)
6286 return rc;
6287
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006288 /* Special case for polling mode */
6289 if (!irq) {
6290 WARN_ON(irq_handler);
6291 return ata_host_register(host, sht);
6292 }
6293
Tejun Heof5cda252007-04-17 23:44:07 +09006294 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6295 dev_driver_string(host->dev), host);
6296 if (rc)
6297 return rc;
6298
Tejun Heocbcdd872007-08-18 13:14:55 +09006299 for (i = 0; i < host->n_ports; i++)
6300 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006301
Tejun Heof5cda252007-04-17 23:44:07 +09006302 rc = ata_host_register(host, sht);
6303 /* if failed, just free the IRQ and leave ports alone */
6304 if (rc)
6305 devm_free_irq(host->dev, irq, host);
6306
6307 return rc;
6308}
6309
6310/**
Tejun Heo720ba122006-05-31 18:28:13 +09006311 * ata_port_detach - Detach ATA port in prepration of device removal
6312 * @ap: ATA port to be detached
6313 *
6314 * Detach all ATA devices and the associated SCSI devices of @ap;
6315 * then, remove the associated SCSI host. @ap is guaranteed to
6316 * be quiescent on return from this function.
6317 *
6318 * LOCKING:
6319 * Kernel thread context (may sleep).
6320 */
Adrian Bunk741b7762007-10-24 18:23:06 +02006321static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09006322{
6323 unsigned long flags;
Tejun Heo720ba122006-05-31 18:28:13 +09006324
6325 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006326 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006327
6328 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006329 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006330 ap->pflags |= ATA_PFLAG_UNLOADING;
Tejun Heoece180d2008-11-03 20:04:37 +09006331 ata_port_schedule_eh(ap);
Jeff Garzikba6a1302006-06-22 23:46:10 -04006332 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006333
Tejun Heoece180d2008-11-03 20:04:37 +09006334 /* wait till EH commits suicide */
Tejun Heo720ba122006-05-31 18:28:13 +09006335 ata_port_wait_eh(ap);
6336
Tejun Heoece180d2008-11-03 20:04:37 +09006337 /* it better be dead now */
6338 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
Tejun Heo720ba122006-05-31 18:28:13 +09006339
Tejun Heoafe2c512010-12-14 16:21:17 +01006340 cancel_delayed_work_sync(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006341
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006342 skip_eh:
Gwendal Grignoud9027472010-05-25 12:31:38 -07006343 if (ap->pmp_link) {
6344 int i;
6345 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6346 ata_tlink_delete(&ap->pmp_link[i]);
6347 }
Tejun Heo720ba122006-05-31 18:28:13 +09006348 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006349 scsi_remove_host(ap->scsi_host);
Rafael J. Wysockic5700762013-11-25 13:19:01 +01006350 ata_tport_delete(ap);
Tejun Heo720ba122006-05-31 18:28:13 +09006351}
6352
6353/**
Tejun Heo0529c152007-01-20 16:00:26 +09006354 * ata_host_detach - Detach all ports of an ATA host
6355 * @host: Host to detach
6356 *
6357 * Detach all ports of @host.
6358 *
6359 * LOCKING:
6360 * Kernel thread context (may sleep).
6361 */
6362void ata_host_detach(struct ata_host *host)
6363{
6364 int i;
6365
6366 for (i = 0; i < host->n_ports; i++)
6367 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006368
6369 /* the host is dead now, dissociate ACPI */
6370 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09006371}
6372
Jeff Garzik374b1872005-08-30 05:42:52 -04006373#ifdef CONFIG_PCI
6374
Edward Falk0baab862005-06-02 18:17:13 -04006375/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006376 * ata_pci_remove_one - PCI layer callback for device removal
6377 * @pdev: PCI device that was removed
6378 *
Tejun Heob878ca52007-01-20 16:00:28 +09006379 * PCI layer indicates to libata via this hook that hot-unplug or
6380 * module unload event has occurred. Detach all ports. Resource
6381 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006382 *
6383 * LOCKING:
6384 * Inherited from PCI layer (may sleep).
6385 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006386void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006387{
Brian Norris04a3f5b2012-12-03 10:34:41 -08006388 struct ata_host *host = pci_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006389
Tejun Heob878ca52007-01-20 16:00:28 +09006390 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006391}
6392
6393/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006394int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006395{
6396 unsigned long tmp = 0;
6397
6398 switch (bits->width) {
6399 case 1: {
6400 u8 tmp8 = 0;
6401 pci_read_config_byte(pdev, bits->reg, &tmp8);
6402 tmp = tmp8;
6403 break;
6404 }
6405 case 2: {
6406 u16 tmp16 = 0;
6407 pci_read_config_word(pdev, bits->reg, &tmp16);
6408 tmp = tmp16;
6409 break;
6410 }
6411 case 4: {
6412 u32 tmp32 = 0;
6413 pci_read_config_dword(pdev, bits->reg, &tmp32);
6414 tmp = tmp32;
6415 break;
6416 }
6417
6418 default:
6419 return -EINVAL;
6420 }
6421
6422 tmp &= bits->mask;
6423
6424 return (tmp == bits->val) ? 1 : 0;
6425}
Jens Axboe9b847542006-01-06 09:28:07 +01006426
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006427#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006428void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006429{
6430 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006431 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006432
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006433 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006434 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006435}
6436
Tejun Heo553c4aa2006-12-26 19:39:50 +09006437int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006438{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006439 int rc;
6440
Jens Axboe9b847542006-01-06 09:28:07 +01006441 pci_set_power_state(pdev, PCI_D0);
6442 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006443
Tejun Heob878ca52007-01-20 16:00:28 +09006444 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006445 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -07006446 dev_err(&pdev->dev,
6447 "failed to enable device after resume (%d)\n", rc);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006448 return rc;
6449 }
6450
Jens Axboe9b847542006-01-06 09:28:07 +01006451 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006452 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006453}
6454
Tejun Heo3c5100c2006-07-26 16:58:33 +09006455int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006456{
Brian Norris04a3f5b2012-12-03 10:34:41 -08006457 struct ata_host *host = pci_get_drvdata(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006458 int rc = 0;
6459
Jeff Garzikcca39742006-08-24 03:19:22 -04006460 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006461 if (rc)
6462 return rc;
6463
Tejun Heo3c5100c2006-07-26 16:58:33 +09006464 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006465
6466 return 0;
6467}
6468
6469int ata_pci_device_resume(struct pci_dev *pdev)
6470{
Brian Norris04a3f5b2012-12-03 10:34:41 -08006471 struct ata_host *host = pci_get_drvdata(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006472 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006473
Tejun Heo553c4aa2006-12-26 19:39:50 +09006474 rc = ata_pci_device_do_resume(pdev);
6475 if (rc == 0)
6476 ata_host_resume(host);
6477 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006478}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006479#endif /* CONFIG_PM */
6480
Linus Torvalds1da177e2005-04-16 15:20:36 -07006481#endif /* CONFIG_PCI */
6482
Brian Norrisb7db04d2012-11-02 12:29:32 -07006483/**
6484 * ata_platform_remove_one - Platform layer callback for device removal
6485 * @pdev: Platform device that was removed
6486 *
6487 * Platform layer indicates to libata via this hook that hot-unplug or
6488 * module unload event has occurred. Detach all ports. Resource
6489 * release is handled via devres.
6490 *
6491 * LOCKING:
6492 * Inherited from platform layer (may sleep).
6493 */
6494int ata_platform_remove_one(struct platform_device *pdev)
6495{
6496 struct ata_host *host = platform_get_drvdata(pdev);
6497
6498 ata_host_detach(host);
6499
6500 return 0;
6501}
6502
Tejun Heo33267322008-02-13 09:15:09 +09006503static int __init ata_parse_force_one(char **cur,
6504 struct ata_force_ent *force_ent,
6505 const char **reason)
6506{
6507 /* FIXME: Currently, there's no way to tag init const data and
6508 * using __initdata causes build failure on some versions of
6509 * gcc. Once __initdataconst is implemented, add const to the
6510 * following structure.
6511 */
6512 static struct ata_force_param force_tbl[] __initdata = {
6513 { "40c", .cbl = ATA_CBL_PATA40 },
6514 { "80c", .cbl = ATA_CBL_PATA80 },
6515 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6516 { "unk", .cbl = ATA_CBL_PATA_UNK },
6517 { "ign", .cbl = ATA_CBL_PATA_IGN },
6518 { "sata", .cbl = ATA_CBL_SATA },
6519 { "1.5Gbps", .spd_limit = 1 },
6520 { "3.0Gbps", .spd_limit = 2 },
6521 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6522 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
Tejun Heo43c9c592010-05-23 12:59:11 +02006523 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
Tejun Heo33267322008-02-13 09:15:09 +09006524 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6525 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6526 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6527 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6528 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6529 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6530 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6531 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6532 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6533 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6534 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6535 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6536 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6537 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6538 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6539 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6540 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6541 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6542 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6543 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6544 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6545 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6546 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6547 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6548 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6549 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6550 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6551 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6552 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6553 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6554 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6555 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6556 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6557 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006558 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6559 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6560 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Dan Williamsca6d43b2012-06-21 23:41:41 -07006561 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
Vincent Pelletier966fbe12013-05-21 22:30:58 +02006562 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
Robin H. Johnsonb8bd6dc2013-12-16 09:31:19 -08006563 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
Tejun Heo33267322008-02-13 09:15:09 +09006564 };
6565 char *start = *cur, *p = *cur;
6566 char *id, *val, *endp;
6567 const struct ata_force_param *match_fp = NULL;
6568 int nr_matches = 0, i;
6569
6570 /* find where this param ends and update *cur */
6571 while (*p != '\0' && *p != ',')
6572 p++;
6573
6574 if (*p == '\0')
6575 *cur = p;
6576 else
6577 *cur = p + 1;
6578
6579 *p = '\0';
6580
6581 /* parse */
6582 p = strchr(start, ':');
6583 if (!p) {
6584 val = strstrip(start);
6585 goto parse_val;
6586 }
6587 *p = '\0';
6588
6589 id = strstrip(start);
6590 val = strstrip(p + 1);
6591
6592 /* parse id */
6593 p = strchr(id, '.');
6594 if (p) {
6595 *p++ = '\0';
6596 force_ent->device = simple_strtoul(p, &endp, 10);
6597 if (p == endp || *endp != '\0') {
6598 *reason = "invalid device";
6599 return -EINVAL;
6600 }
6601 }
6602
6603 force_ent->port = simple_strtoul(id, &endp, 10);
6604 if (p == endp || *endp != '\0') {
6605 *reason = "invalid port/link";
6606 return -EINVAL;
6607 }
6608
6609 parse_val:
6610 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6611 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6612 const struct ata_force_param *fp = &force_tbl[i];
6613
6614 if (strncasecmp(val, fp->name, strlen(val)))
6615 continue;
6616
6617 nr_matches++;
6618 match_fp = fp;
6619
6620 if (strcasecmp(val, fp->name) == 0) {
6621 nr_matches = 1;
6622 break;
6623 }
6624 }
6625
6626 if (!nr_matches) {
6627 *reason = "unknown value";
6628 return -EINVAL;
6629 }
6630 if (nr_matches > 1) {
6631 *reason = "ambigious value";
6632 return -EINVAL;
6633 }
6634
6635 force_ent->param = *match_fp;
6636
6637 return 0;
6638}
6639
6640static void __init ata_parse_force_param(void)
6641{
6642 int idx = 0, size = 1;
6643 int last_port = -1, last_device = -1;
6644 char *p, *cur, *next;
6645
6646 /* calculate maximum number of params and allocate force_tbl */
6647 for (p = ata_force_param_buf; *p; p++)
6648 if (*p == ',')
6649 size++;
6650
6651 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6652 if (!ata_force_tbl) {
6653 printk(KERN_WARNING "ata: failed to extend force table, "
6654 "libata.force ignored\n");
6655 return;
6656 }
6657
6658 /* parse and populate the table */
6659 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6660 const char *reason = "";
6661 struct ata_force_ent te = { .port = -1, .device = -1 };
6662
6663 next = cur;
6664 if (ata_parse_force_one(&next, &te, &reason)) {
6665 printk(KERN_WARNING "ata: failed to parse force "
6666 "parameter \"%s\" (%s)\n",
6667 cur, reason);
6668 continue;
6669 }
6670
6671 if (te.port == -1) {
6672 te.port = last_port;
6673 te.device = last_device;
6674 }
6675
6676 ata_force_tbl[idx++] = te;
6677
6678 last_port = te.port;
6679 last_device = te.device;
6680 }
6681
6682 ata_force_tbl_size = idx;
6683}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006684
Linus Torvalds1da177e2005-04-16 15:20:36 -07006685static int __init ata_init(void)
6686{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006687 int rc;
Tejun Heo270390e2010-05-10 21:41:35 +02006688
Tejun Heo33267322008-02-13 09:15:09 +09006689 ata_parse_force_param();
6690
Tejun Heo270390e2010-05-10 21:41:35 +02006691 rc = ata_sff_init();
Tejun Heoad72cf92010-07-02 10:03:52 +02006692 if (rc) {
6693 kfree(ata_force_tbl);
6694 return rc;
6695 }
Tejun Heo453b07a2006-05-31 18:27:42 +09006696
Gwendal Grignoud9027472010-05-25 12:31:38 -07006697 libata_transport_init();
6698 ata_scsi_transport_template = ata_attach_transport();
6699 if (!ata_scsi_transport_template) {
6700 ata_sff_exit();
6701 rc = -ENOMEM;
6702 goto err_out;
Jeff Garzik4fca3772011-02-15 01:13:24 -05006703 }
Gwendal Grignoud9027472010-05-25 12:31:38 -07006704
Linus Torvalds1da177e2005-04-16 15:20:36 -07006705 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6706 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006707
6708err_out:
6709 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006710}
6711
6712static void __exit ata_exit(void)
6713{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006714 ata_release_transport(ata_scsi_transport_template);
6715 libata_transport_exit();
Tejun Heo270390e2010-05-10 21:41:35 +02006716 ata_sff_exit();
Tejun Heo33267322008-02-13 09:15:09 +09006717 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006718}
6719
Brian Kinga4625082006-11-13 16:32:36 -06006720subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006721module_exit(ata_exit);
6722
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006723static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
Jeff Garzik67846b32005-10-05 02:58:32 -04006724
6725int ata_ratelimit(void)
6726{
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006727 return __ratelimit(&ratelimit);
Jeff Garzik67846b32005-10-05 02:58:32 -04006728}
6729
Tejun Heoc0c362b2010-09-06 17:57:14 +02006730/**
6731 * ata_msleep - ATA EH owner aware msleep
6732 * @ap: ATA port to attribute the sleep to
6733 * @msecs: duration to sleep in milliseconds
6734 *
6735 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6736 * ownership is released before going to sleep and reacquired
6737 * after the sleep is complete. IOW, other ports sharing the
6738 * @ap->host will be allowed to own the EH while this task is
6739 * sleeping.
6740 *
6741 * LOCKING:
6742 * Might sleep.
6743 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006744void ata_msleep(struct ata_port *ap, unsigned int msecs)
6745{
Tejun Heoc0c362b2010-09-06 17:57:14 +02006746 bool owns_eh = ap && ap->host->eh_owner == current;
6747
6748 if (owns_eh)
6749 ata_eh_release(ap);
6750
Tejun Heo97750ce2010-09-06 17:56:29 +02006751 msleep(msecs);
Tejun Heoc0c362b2010-09-06 17:57:14 +02006752
6753 if (owns_eh)
6754 ata_eh_acquire(ap);
Tejun Heo97750ce2010-09-06 17:56:29 +02006755}
6756
Tejun Heoc22daff2006-04-11 22:22:29 +09006757/**
6758 * ata_wait_register - wait until register value changes
Tejun Heo97750ce2010-09-06 17:56:29 +02006759 * @ap: ATA port to wait register for, can be NULL
Tejun Heoc22daff2006-04-11 22:22:29 +09006760 * @reg: IO-mapped register
6761 * @mask: Mask to apply to read register value
6762 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006763 * @interval: polling interval in milliseconds
6764 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006765 *
6766 * Waiting for some bits of register to change is a common
6767 * operation for ATA controllers. This function reads 32bit LE
6768 * IO-mapped register @reg and tests for the following condition.
6769 *
6770 * (*@reg & mask) != val
6771 *
6772 * If the condition is met, it returns; otherwise, the process is
6773 * repeated after @interval_msec until timeout.
6774 *
6775 * LOCKING:
6776 * Kernel thread context (may sleep)
6777 *
6778 * RETURNS:
6779 * The final register value.
6780 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006781u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006782 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006783{
Tejun Heo341c2c92008-05-20 02:17:51 +09006784 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006785 u32 tmp;
6786
6787 tmp = ioread32(reg);
6788
6789 /* Calculate timeout _after_ the first read to make sure
6790 * preceding writes reach the controller before starting to
6791 * eat away the timeout.
6792 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006793 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006794
Tejun Heo341c2c92008-05-20 02:17:51 +09006795 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
Tejun Heo97750ce2010-09-06 17:56:29 +02006796 ata_msleep(ap, interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006797 tmp = ioread32(reg);
6798 }
6799
6800 return tmp;
6801}
6802
Linus Torvalds1da177e2005-04-16 15:20:36 -07006803/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006804 * Dummy port_ops
6805 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006806static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6807{
6808 return AC_ERR_SYSTEM;
6809}
6810
Tejun Heo182d7bb2008-04-07 22:47:21 +09006811static void ata_dummy_error_handler(struct ata_port *ap)
6812{
6813 /* truly dummy */
6814}
6815
Tejun Heo029cfd62008-03-25 12:22:49 +09006816struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006817 .qc_prep = ata_noop_qc_prep,
6818 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006819 .error_handler = ata_dummy_error_handler,
Dan Williamse4a9c372012-06-21 23:25:27 -07006820 .sched_eh = ata_std_sched_eh,
6821 .end_eh = ata_std_end_eh,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006822};
6823
Tejun Heo21b0ad42007-04-17 23:44:07 +09006824const struct ata_port_info ata_dummy_port_info = {
6825 .port_ops = &ata_dummy_port_ops,
6826};
6827
Tejun Heodd5b06c2006-08-10 16:59:12 +09006828/*
Joe Perchesa9a79df2011-04-15 15:51:59 -07006829 * Utility print functions
6830 */
6831int ata_port_printk(const struct ata_port *ap, const char *level,
6832 const char *fmt, ...)
6833{
6834 struct va_format vaf;
6835 va_list args;
6836 int r;
6837
6838 va_start(args, fmt);
6839
6840 vaf.fmt = fmt;
6841 vaf.va = &args;
6842
6843 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6844
6845 va_end(args);
6846
6847 return r;
6848}
6849EXPORT_SYMBOL(ata_port_printk);
6850
6851int ata_link_printk(const struct ata_link *link, const char *level,
6852 const char *fmt, ...)
6853{
6854 struct va_format vaf;
6855 va_list args;
6856 int r;
6857
6858 va_start(args, fmt);
6859
6860 vaf.fmt = fmt;
6861 vaf.va = &args;
6862
6863 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6864 r = printk("%sata%u.%02u: %pV",
6865 level, link->ap->print_id, link->pmp, &vaf);
6866 else
6867 r = printk("%sata%u: %pV",
6868 level, link->ap->print_id, &vaf);
6869
6870 va_end(args);
6871
6872 return r;
6873}
6874EXPORT_SYMBOL(ata_link_printk);
6875
6876int ata_dev_printk(const struct ata_device *dev, const char *level,
6877 const char *fmt, ...)
6878{
6879 struct va_format vaf;
6880 va_list args;
6881 int r;
6882
6883 va_start(args, fmt);
6884
6885 vaf.fmt = fmt;
6886 vaf.va = &args;
6887
6888 r = printk("%sata%u.%02u: %pV",
6889 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6890 &vaf);
6891
6892 va_end(args);
6893
6894 return r;
6895}
6896EXPORT_SYMBOL(ata_dev_printk);
6897
Joe Perches06296a12011-04-15 15:52:00 -07006898void ata_print_version(const struct device *dev, const char *version)
6899{
6900 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6901}
6902EXPORT_SYMBOL(ata_print_version);
6903
Joe Perchesa9a79df2011-04-15 15:51:59 -07006904/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006905 * libata is essentially a library of internal helper functions for
6906 * low-level ATA host controller drivers. As such, the API/ABI is
6907 * likely to change as new drivers are added and updated.
6908 * Do not depend on ABI/API stability.
6909 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006910EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6911EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6912EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006913EXPORT_SYMBOL_GPL(ata_base_port_ops);
6914EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006915EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006916EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heo1eca4362008-11-03 20:03:17 +09006917EXPORT_SYMBOL_GPL(ata_link_next);
6918EXPORT_SYMBOL_GPL(ata_dev_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006919EXPORT_SYMBOL_GPL(ata_std_bios_param);
Tejun Heod8d91292010-05-15 20:09:34 +02006920EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
Jeff Garzikcca39742006-08-24 03:19:22 -04006921EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006922EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006923EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006924EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006925EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006926EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006927EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09006928EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006929EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006930EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006931EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006932EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006933EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6934EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006935EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6936EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6937EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6938EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6939EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6940EXPORT_SYMBOL_GPL(ata_mode_string);
6941EXPORT_SYMBOL_GPL(ata_id_xfermask);
Alan04351822007-03-06 02:37:52 -08006942EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006943EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006944EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Alan10305f02007-02-20 18:01:59 +00006945EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006946EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006947EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006948EXPORT_SYMBOL_GPL(sata_link_debounce);
6949EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo1152b262010-09-01 17:50:05 +02006950EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
Tejun Heo0aa11132008-04-07 22:47:18 +09006951EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006952EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006953EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006954EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006955EXPORT_SYMBOL_GPL(ata_dev_classify);
6956EXPORT_SYMBOL_GPL(ata_dev_pair);
Jeff Garzik67846b32005-10-05 02:58:32 -04006957EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heo97750ce2010-09-06 17:56:29 +02006958EXPORT_SYMBOL_GPL(ata_msleep);
Tejun Heoc22daff2006-04-11 22:22:29 +09006959EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006960EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006961EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006962EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006963EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Dan Williamsf6e67032011-09-20 15:10:33 -07006964EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006965EXPORT_SYMBOL_GPL(sata_scr_valid);
6966EXPORT_SYMBOL_GPL(sata_scr_read);
6967EXPORT_SYMBOL_GPL(sata_scr_write);
6968EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006969EXPORT_SYMBOL_GPL(ata_link_online);
6970EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006971#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006972EXPORT_SYMBOL_GPL(ata_host_suspend);
6973EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006974#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006975EXPORT_SYMBOL_GPL(ata_id_string);
6976EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006977EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006978EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6979
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006980EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006981EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006982EXPORT_SYMBOL_GPL(ata_timing_compute);
6983EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006984EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006985
Linus Torvalds1da177e2005-04-16 15:20:36 -07006986#ifdef CONFIG_PCI
6987EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006988EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006989#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006990EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6991EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006992EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6993EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006994#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006995#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006996
Brian Norrisb7db04d2012-11-02 12:29:32 -07006997EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6998
Tejun Heob64bbc32007-07-16 14:29:39 +09006999EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7000EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7001EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09007002EXPORT_SYMBOL_GPL(ata_port_desc);
7003#ifdef CONFIG_PCI
7004EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7005#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09007006EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09007007EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09007008EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09007009EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09007010EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09007011EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7012EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09007013EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7014EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04007015EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09007016EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09007017EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08007018
7019EXPORT_SYMBOL_GPL(ata_cable_40wire);
7020EXPORT_SYMBOL_GPL(ata_cable_80wire);
7021EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09007022EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08007023EXPORT_SYMBOL_GPL(ata_cable_sata);