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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Alan Cox92c52c52007-11-19 14:30:16 +000033 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
40 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/kernel.h>
44#include <linux/module.h>
45#include <linux/pci.h>
46#include <linux/init.h>
47#include <linux/list.h>
48#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/spinlock.h>
50#include <linux/blkdev.h>
51#include <linux/delay.h>
52#include <linux/timer.h>
53#include <linux/interrupt.h>
54#include <linux/completion.h>
55#include <linux/suspend.h>
56#include <linux/workqueue.h>
David Hardeman378f0582005-09-17 17:55:31 +100057#include <linux/scatterlist.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040058#include <linux/io.h>
Arjan van de Ven79318052009-01-04 05:32:28 -080059#include <linux/async.h>
Mark Lorde18086d2009-03-19 13:32:21 -040060#include <linux/log2.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090061#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050063#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <scsi/scsi_host.h>
65#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#include <asm/byteorder.h>
Tejun Heo140b5e52007-12-12 12:21:52 +090067#include <linux/cdrom.h>
Akinobu Mita9990b6f2010-04-12 21:11:41 +090068#include <linux/ratelimit.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70#include "libata.h"
Gwendal Grignoud9027472010-05-25 12:31:38 -070071#include "libata-transport.h"
Jeff Garzikfda0efc2007-01-31 07:43:15 -050072
Tejun Heod7bb4cc2006-05-31 18:27:46 +090073/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090074const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
75const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
76const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090077
Tejun Heo029cfd62008-03-25 12:22:49 +090078const struct ata_port_operations ata_base_port_ops = {
Tejun Heo0aa11132008-04-07 22:47:18 +090079 .prereset = ata_std_prereset,
Tejun Heo203c75b2008-04-07 22:47:18 +090080 .postreset = ata_std_postreset,
Tejun Heoa1efdab2008-03-25 12:22:50 +090081 .error_handler = ata_std_error_handler,
Tejun Heo029cfd62008-03-25 12:22:49 +090082};
83
84const struct ata_port_operations sata_port_ops = {
85 .inherits = &ata_base_port_ops,
86
87 .qc_defer = ata_std_qc_defer,
Tejun Heo57c9efd2008-04-07 22:47:19 +090088 .hardreset = sata_std_hardreset,
Tejun Heo029cfd62008-03-25 12:22:49 +090089};
90
Tejun Heo3373efd2006-05-15 20:57:53 +090091static unsigned int ata_dev_init_params(struct ata_device *dev,
92 u16 heads, u16 sectors);
93static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
94static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090095static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Tejun Heof3187192007-04-17 23:44:07 +090097unsigned int ata_print_id = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Tejun Heo33267322008-02-13 09:15:09 +090099struct ata_force_param {
100 const char *name;
101 unsigned int cbl;
102 int spd_limit;
103 unsigned long xfer_mask;
104 unsigned int horkage_on;
105 unsigned int horkage_off;
Tejun Heo05944bd2008-08-13 20:19:09 +0900106 unsigned int lflags;
Tejun Heo33267322008-02-13 09:15:09 +0900107};
108
109struct ata_force_ent {
110 int port;
111 int device;
112 struct ata_force_param param;
113};
114
115static struct ata_force_ent *ata_force_tbl;
116static int ata_force_tbl_size;
117
118static char ata_force_param_buf[PAGE_SIZE] __initdata;
Tejun Heo7afb4222008-03-09 20:21:53 +0900119/* param_buf is thrown away after initialization, disallow read */
120module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
Tejun Heo33267322008-02-13 09:15:09 +0900121MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
122
Tejun Heo2486fa52008-07-31 07:52:40 +0900123static int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -0400124module_param(atapi_enabled, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200125MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
Jeff Garzik1623c812005-08-30 03:37:42 -0400126
Adrian Bunkc5c61bd2008-02-25 02:07:25 +0200127static int atapi_dmadir = 0;
Albert Lee95de7192006-04-04 10:57:18 +0800128module_param(atapi_dmadir, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200129MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
Albert Lee95de7192006-04-04 10:57:18 +0800130
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900131int atapi_passthru16 = 1;
132module_param(atapi_passthru16, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200133MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900134
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500135int libata_fua = 0;
136module_param_named(fua, libata_fua, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200137MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500138
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400139static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100140module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
141MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
142
Alan Coxb3a70602007-10-02 12:38:26 -0400143static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
144module_param_named(dma, libata_dma_mask, int, 0444);
145MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
146
Tejun Heo87fbc5a2008-05-20 02:17:54 +0900147static int ata_probe_timeout;
Andrew Mortona8601e52006-06-25 01:36:52 -0700148module_param(ata_probe_timeout, int, 0444);
149MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
150
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400151int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400152module_param_named(noacpi, libata_noacpi, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200153MODULE_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 -0700154
Alan Coxae8d4ee2007-11-04 22:05:49 -0500155int libata_allow_tpm = 0;
156module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200157MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
Alan Coxae8d4ee2007-11-04 22:05:49 -0500158
Tejun Heoe7ecd432010-05-19 15:38:58 +0200159static int atapi_an;
160module_param(atapi_an, int, 0444);
161MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163MODULE_AUTHOR("Jeff Garzik");
164MODULE_DESCRIPTION("Library module for ATA devices");
165MODULE_LICENSE("GPL");
166MODULE_VERSION(DRV_VERSION);
167
Edward Falk0baab862005-06-02 18:17:13 -0400168
Tejun Heo9913ff82009-01-29 20:31:31 +0900169static bool ata_sstatus_online(u32 sstatus)
170{
171 return (sstatus & 0xf) == 0x3;
172}
173
Tejun Heo1eca4362008-11-03 20:03:17 +0900174/**
175 * ata_link_next - link iteration helper
176 * @link: the previous link, NULL to start
177 * @ap: ATA port containing links to iterate
178 * @mode: iteration mode, one of ATA_LITER_*
Tejun Heoaadffb62008-07-31 17:02:41 +0900179 *
Tejun Heo1eca4362008-11-03 20:03:17 +0900180 * LOCKING:
181 * Host lock or EH context.
182 *
183 * RETURNS:
184 * Pointer to the next link.
Tejun Heoaadffb62008-07-31 17:02:41 +0900185 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900186struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
187 enum ata_link_iter_mode mode)
Tejun Heoaadffb62008-07-31 17:02:41 +0900188{
Tejun Heo1eca4362008-11-03 20:03:17 +0900189 BUG_ON(mode != ATA_LITER_EDGE &&
190 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
Tejun Heoaadffb62008-07-31 17:02:41 +0900191
Tejun Heo1eca4362008-11-03 20:03:17 +0900192 /* NULL link indicates start of iteration */
193 if (!link)
194 switch (mode) {
195 case ATA_LITER_EDGE:
196 case ATA_LITER_PMP_FIRST:
197 if (sata_pmp_attached(ap))
198 return ap->pmp_link;
199 /* fall through */
200 case ATA_LITER_HOST_FIRST:
201 return &ap->link;
202 }
203
204 /* we just iterated over the host link, what's next? */
205 if (link == &ap->link)
206 switch (mode) {
207 case ATA_LITER_HOST_FIRST:
208 if (sata_pmp_attached(ap))
209 return ap->pmp_link;
210 /* fall through */
211 case ATA_LITER_PMP_FIRST:
212 if (unlikely(ap->slave_link))
Tejun Heob1c72912008-07-31 17:02:43 +0900213 return ap->slave_link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900214 /* fall through */
215 case ATA_LITER_EDGE:
Tejun Heoaadffb62008-07-31 17:02:41 +0900216 return NULL;
Tejun Heob1c72912008-07-31 17:02:43 +0900217 }
Tejun Heoaadffb62008-07-31 17:02:41 +0900218
Tejun Heob1c72912008-07-31 17:02:43 +0900219 /* slave_link excludes PMP */
220 if (unlikely(link == ap->slave_link))
221 return NULL;
222
Tejun Heo1eca4362008-11-03 20:03:17 +0900223 /* we were over a PMP link */
Tejun Heoaadffb62008-07-31 17:02:41 +0900224 if (++link < ap->pmp_link + ap->nr_pmp_links)
225 return link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900226
227 if (mode == ATA_LITER_PMP_FIRST)
228 return &ap->link;
229
Tejun Heoaadffb62008-07-31 17:02:41 +0900230 return NULL;
231}
232
Edward Falk0baab862005-06-02 18:17:13 -0400233/**
Tejun Heo1eca4362008-11-03 20:03:17 +0900234 * ata_dev_next - device iteration helper
235 * @dev: the previous device, NULL to start
236 * @link: ATA link containing devices to iterate
237 * @mode: iteration mode, one of ATA_DITER_*
238 *
239 * LOCKING:
240 * Host lock or EH context.
241 *
242 * RETURNS:
243 * Pointer to the next device.
244 */
245struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
246 enum ata_dev_iter_mode mode)
247{
248 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
249 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
250
251 /* NULL dev indicates start of iteration */
252 if (!dev)
253 switch (mode) {
254 case ATA_DITER_ENABLED:
255 case ATA_DITER_ALL:
256 dev = link->device;
257 goto check;
258 case ATA_DITER_ENABLED_REVERSE:
259 case ATA_DITER_ALL_REVERSE:
260 dev = link->device + ata_link_max_devices(link) - 1;
261 goto check;
262 }
263
264 next:
265 /* move to the next one */
266 switch (mode) {
267 case ATA_DITER_ENABLED:
268 case ATA_DITER_ALL:
269 if (++dev < link->device + ata_link_max_devices(link))
270 goto check;
271 return NULL;
272 case ATA_DITER_ENABLED_REVERSE:
273 case ATA_DITER_ALL_REVERSE:
274 if (--dev >= link->device)
275 goto check;
276 return NULL;
277 }
278
279 check:
280 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
281 !ata_dev_enabled(dev))
282 goto next;
283 return dev;
284}
285
286/**
Tejun Heob1c72912008-07-31 17:02:43 +0900287 * ata_dev_phys_link - find physical link for a device
288 * @dev: ATA device to look up physical link for
289 *
290 * Look up physical link which @dev is attached to. Note that
291 * this is different from @dev->link only when @dev is on slave
292 * link. For all other cases, it's the same as @dev->link.
293 *
294 * LOCKING:
295 * Don't care.
296 *
297 * RETURNS:
298 * Pointer to the found physical link.
299 */
300struct ata_link *ata_dev_phys_link(struct ata_device *dev)
301{
302 struct ata_port *ap = dev->link->ap;
303
304 if (!ap->slave_link)
305 return dev->link;
306 if (!dev->devno)
307 return &ap->link;
308 return ap->slave_link;
309}
310
311/**
Tejun Heo33267322008-02-13 09:15:09 +0900312 * ata_force_cbl - force cable type according to libata.force
Randy Dunlap4cdfa1b2008-02-22 12:21:37 -0800313 * @ap: ATA port of interest
Tejun Heo33267322008-02-13 09:15:09 +0900314 *
315 * Force cable type according to libata.force and whine about it.
316 * The last entry which has matching port number is used, so it
317 * can be specified as part of device force parameters. For
318 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
319 * same effect.
320 *
321 * LOCKING:
322 * EH context.
323 */
324void ata_force_cbl(struct ata_port *ap)
325{
326 int i;
327
328 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
329 const struct ata_force_ent *fe = &ata_force_tbl[i];
330
331 if (fe->port != -1 && fe->port != ap->print_id)
332 continue;
333
334 if (fe->param.cbl == ATA_CBL_NONE)
335 continue;
336
337 ap->cbl = fe->param.cbl;
338 ata_port_printk(ap, KERN_NOTICE,
339 "FORCE: cable set to %s\n", fe->param.name);
340 return;
341 }
342}
343
344/**
Tejun Heo05944bd2008-08-13 20:19:09 +0900345 * ata_force_link_limits - force link limits according to libata.force
Tejun Heo33267322008-02-13 09:15:09 +0900346 * @link: ATA link of interest
347 *
Tejun Heo05944bd2008-08-13 20:19:09 +0900348 * Force link flags and SATA spd limit according to libata.force
349 * and whine about it. When only the port part is specified
350 * (e.g. 1:), the limit applies to all links connected to both
351 * the host link and all fan-out ports connected via PMP. If the
352 * device part is specified as 0 (e.g. 1.00:), it specifies the
353 * first fan-out link not the host link. Device number 15 always
Tejun Heob1c72912008-07-31 17:02:43 +0900354 * points to the host link whether PMP is attached or not. If the
355 * controller has slave link, device number 16 points to it.
Tejun Heo33267322008-02-13 09:15:09 +0900356 *
357 * LOCKING:
358 * EH context.
359 */
Tejun Heo05944bd2008-08-13 20:19:09 +0900360static void ata_force_link_limits(struct ata_link *link)
Tejun Heo33267322008-02-13 09:15:09 +0900361{
Tejun Heo05944bd2008-08-13 20:19:09 +0900362 bool did_spd = false;
Tejun Heob1c72912008-07-31 17:02:43 +0900363 int linkno = link->pmp;
364 int i;
Tejun Heo33267322008-02-13 09:15:09 +0900365
366 if (ata_is_host_link(link))
Tejun Heob1c72912008-07-31 17:02:43 +0900367 linkno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900368
369 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
370 const struct ata_force_ent *fe = &ata_force_tbl[i];
371
372 if (fe->port != -1 && fe->port != link->ap->print_id)
373 continue;
374
375 if (fe->device != -1 && fe->device != linkno)
376 continue;
377
Tejun Heo05944bd2008-08-13 20:19:09 +0900378 /* only honor the first spd limit */
379 if (!did_spd && fe->param.spd_limit) {
380 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
381 ata_link_printk(link, KERN_NOTICE,
382 "FORCE: PHY spd limit set to %s\n",
383 fe->param.name);
384 did_spd = true;
385 }
Tejun Heo33267322008-02-13 09:15:09 +0900386
Tejun Heo05944bd2008-08-13 20:19:09 +0900387 /* let lflags stack */
388 if (fe->param.lflags) {
389 link->flags |= fe->param.lflags;
390 ata_link_printk(link, KERN_NOTICE,
391 "FORCE: link flag 0x%x forced -> 0x%x\n",
392 fe->param.lflags, link->flags);
393 }
Tejun Heo33267322008-02-13 09:15:09 +0900394 }
395}
396
397/**
398 * ata_force_xfermask - force xfermask according to libata.force
399 * @dev: ATA device of interest
400 *
401 * Force xfer_mask according to libata.force and whine about it.
402 * For consistency with link selection, device number 15 selects
403 * the first device connected to the host link.
404 *
405 * LOCKING:
406 * EH context.
407 */
408static void ata_force_xfermask(struct ata_device *dev)
409{
410 int devno = dev->link->pmp + dev->devno;
411 int alt_devno = devno;
412 int i;
413
Tejun Heob1c72912008-07-31 17:02:43 +0900414 /* allow n.15/16 for devices attached to host port */
415 if (ata_is_host_link(dev->link))
416 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900417
418 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
419 const struct ata_force_ent *fe = &ata_force_tbl[i];
420 unsigned long pio_mask, mwdma_mask, udma_mask;
421
422 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
423 continue;
424
425 if (fe->device != -1 && fe->device != devno &&
426 fe->device != alt_devno)
427 continue;
428
429 if (!fe->param.xfer_mask)
430 continue;
431
432 ata_unpack_xfermask(fe->param.xfer_mask,
433 &pio_mask, &mwdma_mask, &udma_mask);
434 if (udma_mask)
435 dev->udma_mask = udma_mask;
436 else if (mwdma_mask) {
437 dev->udma_mask = 0;
438 dev->mwdma_mask = mwdma_mask;
439 } else {
440 dev->udma_mask = 0;
441 dev->mwdma_mask = 0;
442 dev->pio_mask = pio_mask;
443 }
444
445 ata_dev_printk(dev, KERN_NOTICE,
446 "FORCE: xfer_mask set to %s\n", fe->param.name);
447 return;
448 }
449}
450
451/**
452 * ata_force_horkage - force horkage according to libata.force
453 * @dev: ATA device of interest
454 *
455 * Force horkage according to libata.force and whine about it.
456 * For consistency with link selection, device number 15 selects
457 * the first device connected to the host link.
458 *
459 * LOCKING:
460 * EH context.
461 */
462static void ata_force_horkage(struct ata_device *dev)
463{
464 int devno = dev->link->pmp + dev->devno;
465 int alt_devno = devno;
466 int i;
467
Tejun Heob1c72912008-07-31 17:02:43 +0900468 /* allow n.15/16 for devices attached to host port */
469 if (ata_is_host_link(dev->link))
470 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900471
472 for (i = 0; i < ata_force_tbl_size; i++) {
473 const struct ata_force_ent *fe = &ata_force_tbl[i];
474
475 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
476 continue;
477
478 if (fe->device != -1 && fe->device != devno &&
479 fe->device != alt_devno)
480 continue;
481
482 if (!(~dev->horkage & fe->param.horkage_on) &&
483 !(dev->horkage & fe->param.horkage_off))
484 continue;
485
486 dev->horkage |= fe->param.horkage_on;
487 dev->horkage &= ~fe->param.horkage_off;
488
489 ata_dev_printk(dev, KERN_NOTICE,
490 "FORCE: horkage modified (%s)\n", fe->param.name);
491 }
492}
493
494/**
Tejun Heo436d34b2008-04-02 17:28:46 +0900495 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
496 * @opcode: SCSI opcode
497 *
498 * Determine ATAPI command type from @opcode.
499 *
500 * LOCKING:
501 * None.
502 *
503 * RETURNS:
504 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
505 */
506int atapi_cmd_type(u8 opcode)
507{
508 switch (opcode) {
509 case GPCMD_READ_10:
510 case GPCMD_READ_12:
511 return ATAPI_READ;
512
513 case GPCMD_WRITE_10:
514 case GPCMD_WRITE_12:
515 case GPCMD_WRITE_AND_VERIFY_10:
516 return ATAPI_WRITE;
517
518 case GPCMD_READ_CD:
519 case GPCMD_READ_CD_MSF:
520 return ATAPI_READ_CD;
521
Tejun Heoe52dcc42008-04-02 17:35:19 +0900522 case ATA_16:
523 case ATA_12:
524 if (atapi_passthru16)
525 return ATAPI_PASS_THRU;
526 /* fall thru */
Tejun Heo436d34b2008-04-02 17:28:46 +0900527 default:
528 return ATAPI_MISC;
529 }
530}
531
532/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
534 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900536 * @is_cmd: This FIS is for command
537 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 *
539 * Converts a standard ATA taskfile to a Serial ATA
540 * FIS structure (Register - Host to Device).
541 *
542 * LOCKING:
543 * Inherited from caller.
544 */
Tejun Heo99771262007-07-16 14:29:38 +0900545void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546{
Tejun Heo99771262007-07-16 14:29:38 +0900547 fis[0] = 0x27; /* Register - Host to Device FIS */
548 fis[1] = pmp & 0xf; /* Port multiplier number*/
549 if (is_cmd)
550 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 fis[2] = tf->command;
553 fis[3] = tf->feature;
554
555 fis[4] = tf->lbal;
556 fis[5] = tf->lbam;
557 fis[6] = tf->lbah;
558 fis[7] = tf->device;
559
560 fis[8] = tf->hob_lbal;
561 fis[9] = tf->hob_lbam;
562 fis[10] = tf->hob_lbah;
563 fis[11] = tf->hob_feature;
564
565 fis[12] = tf->nsect;
566 fis[13] = tf->hob_nsect;
567 fis[14] = 0;
568 fis[15] = tf->ctl;
569
570 fis[16] = 0;
571 fis[17] = 0;
572 fis[18] = 0;
573 fis[19] = 0;
574}
575
576/**
577 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
578 * @fis: Buffer from which data will be input
579 * @tf: Taskfile to output
580 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500581 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 *
583 * LOCKING:
584 * Inherited from caller.
585 */
586
Jeff Garzik057ace52005-10-22 14:27:05 -0400587void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588{
589 tf->command = fis[2]; /* status */
590 tf->feature = fis[3]; /* error */
591
592 tf->lbal = fis[4];
593 tf->lbam = fis[5];
594 tf->lbah = fis[6];
595 tf->device = fis[7];
596
597 tf->hob_lbal = fis[8];
598 tf->hob_lbam = fis[9];
599 tf->hob_lbah = fis[10];
600
601 tf->nsect = fis[12];
602 tf->hob_nsect = fis[13];
603}
604
Albert Lee8cbd6df2005-10-12 15:06:27 +0800605static const u8 ata_rw_cmds[] = {
606 /* pio multi */
607 ATA_CMD_READ_MULTI,
608 ATA_CMD_WRITE_MULTI,
609 ATA_CMD_READ_MULTI_EXT,
610 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100611 0,
612 0,
613 0,
614 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800615 /* pio */
616 ATA_CMD_PIO_READ,
617 ATA_CMD_PIO_WRITE,
618 ATA_CMD_PIO_READ_EXT,
619 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100620 0,
621 0,
622 0,
623 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800624 /* dma */
625 ATA_CMD_READ,
626 ATA_CMD_WRITE,
627 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100628 ATA_CMD_WRITE_EXT,
629 0,
630 0,
631 0,
632 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800633};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
635/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800636 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900637 * @tf: command to examine and configure
638 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500640 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800641 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 *
643 * LOCKING:
644 * caller.
645 */
Tejun Heobd056d72006-11-14 22:47:10 +0900646static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100648 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100650 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500651
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100652 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800653 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
654 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
Albert Lee8cbd6df2005-10-12 15:06:27 +0800656 if (dev->flags & ATA_DFLAG_PIO) {
657 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100658 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900659 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000660 /* Unable to use DMA due to host limitation */
661 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800662 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800663 } else {
664 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100665 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800666 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100668 cmd = ata_rw_cmds[index + fua + lba48 + write];
669 if (cmd) {
670 tf->command = cmd;
671 return 0;
672 }
673 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674}
675
Tejun Heocb95d562006-03-06 04:31:56 +0900676/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900677 * ata_tf_read_block - Read block address from ATA taskfile
678 * @tf: ATA taskfile of interest
679 * @dev: ATA device @tf belongs to
680 *
681 * LOCKING:
682 * None.
683 *
684 * Read block address from @tf. This function can handle all
685 * three address formats - LBA, LBA48 and CHS. tf->protocol and
686 * flags select the address format to use.
687 *
688 * RETURNS:
689 * Block address read from @tf.
690 */
691u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
692{
693 u64 block = 0;
694
695 if (tf->flags & ATA_TFLAG_LBA) {
696 if (tf->flags & ATA_TFLAG_LBA48) {
697 block |= (u64)tf->hob_lbah << 40;
698 block |= (u64)tf->hob_lbam << 32;
Roland Dreier44901a92008-11-04 10:34:48 -0800699 block |= (u64)tf->hob_lbal << 24;
Tejun Heo35b649f2006-11-14 22:37:35 +0900700 } else
701 block |= (tf->device & 0xf) << 24;
702
703 block |= tf->lbah << 16;
704 block |= tf->lbam << 8;
705 block |= tf->lbal;
706 } else {
707 u32 cyl, head, sect;
708
709 cyl = tf->lbam | (tf->lbah << 8);
710 head = tf->device & 0xf;
711 sect = tf->lbal;
712
Tejun Heoac8672e2009-08-16 21:21:21 +0900713 if (!sect) {
714 ata_dev_printk(dev, KERN_WARNING, "device reported "
715 "invalid CHS sector 0\n");
716 sect = 1; /* oh well */
717 }
718
719 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
Tejun Heo35b649f2006-11-14 22:37:35 +0900720 }
721
722 return block;
723}
724
725/**
Tejun Heobd056d72006-11-14 22:47:10 +0900726 * ata_build_rw_tf - Build ATA taskfile for given read/write request
727 * @tf: Target ATA taskfile
728 * @dev: ATA device @tf belongs to
729 * @block: Block address
730 * @n_block: Number of blocks
731 * @tf_flags: RW/FUA etc...
732 * @tag: tag
733 *
734 * LOCKING:
735 * None.
736 *
737 * Build ATA taskfile @tf for read/write request described by
738 * @block, @n_block, @tf_flags and @tag on @dev.
739 *
740 * RETURNS:
741 *
742 * 0 on success, -ERANGE if the request is too large for @dev,
743 * -EINVAL if the request is invalid.
744 */
745int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
746 u64 block, u32 n_block, unsigned int tf_flags,
747 unsigned int tag)
748{
749 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
750 tf->flags |= tf_flags;
751
Tejun Heo6d1245b2007-02-20 23:20:27 +0900752 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900753 /* yay, NCQ */
754 if (!lba_48_ok(block, n_block))
755 return -ERANGE;
756
757 tf->protocol = ATA_PROT_NCQ;
758 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
759
760 if (tf->flags & ATA_TFLAG_WRITE)
761 tf->command = ATA_CMD_FPDMA_WRITE;
762 else
763 tf->command = ATA_CMD_FPDMA_READ;
764
765 tf->nsect = tag << 3;
766 tf->hob_feature = (n_block >> 8) & 0xff;
767 tf->feature = n_block & 0xff;
768
769 tf->hob_lbah = (block >> 40) & 0xff;
770 tf->hob_lbam = (block >> 32) & 0xff;
771 tf->hob_lbal = (block >> 24) & 0xff;
772 tf->lbah = (block >> 16) & 0xff;
773 tf->lbam = (block >> 8) & 0xff;
774 tf->lbal = block & 0xff;
775
776 tf->device = 1 << 6;
777 if (tf->flags & ATA_TFLAG_FUA)
778 tf->device |= 1 << 7;
779 } else if (dev->flags & ATA_DFLAG_LBA) {
780 tf->flags |= ATA_TFLAG_LBA;
781
782 if (lba_28_ok(block, n_block)) {
783 /* use LBA28 */
784 tf->device |= (block >> 24) & 0xf;
785 } else if (lba_48_ok(block, n_block)) {
786 if (!(dev->flags & ATA_DFLAG_LBA48))
787 return -ERANGE;
788
789 /* use LBA48 */
790 tf->flags |= ATA_TFLAG_LBA48;
791
792 tf->hob_nsect = (n_block >> 8) & 0xff;
793
794 tf->hob_lbah = (block >> 40) & 0xff;
795 tf->hob_lbam = (block >> 32) & 0xff;
796 tf->hob_lbal = (block >> 24) & 0xff;
797 } else
798 /* request too large even for LBA48 */
799 return -ERANGE;
800
801 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
802 return -EINVAL;
803
804 tf->nsect = n_block & 0xff;
805
806 tf->lbah = (block >> 16) & 0xff;
807 tf->lbam = (block >> 8) & 0xff;
808 tf->lbal = block & 0xff;
809
810 tf->device |= ATA_LBA;
811 } else {
812 /* CHS */
813 u32 sect, head, cyl, track;
814
815 /* The request -may- be too large for CHS addressing. */
816 if (!lba_28_ok(block, n_block))
817 return -ERANGE;
818
819 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
820 return -EINVAL;
821
822 /* Convert LBA to CHS */
823 track = (u32)block / dev->sectors;
824 cyl = track / dev->heads;
825 head = track % dev->heads;
826 sect = (u32)block % dev->sectors + 1;
827
828 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
829 (u32)block, track, cyl, head, sect);
830
831 /* Check whether the converted CHS can fit.
832 Cylinder: 0-65535
833 Head: 0-15
834 Sector: 1-255*/
835 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
836 return -ERANGE;
837
838 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
839 tf->lbal = sect;
840 tf->lbam = cyl;
841 tf->lbah = cyl >> 8;
842 tf->device |= head;
843 }
844
845 return 0;
846}
847
848/**
Tejun Heocb95d562006-03-06 04:31:56 +0900849 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
850 * @pio_mask: pio_mask
851 * @mwdma_mask: mwdma_mask
852 * @udma_mask: udma_mask
853 *
854 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
855 * unsigned int xfer_mask.
856 *
857 * LOCKING:
858 * None.
859 *
860 * RETURNS:
861 * Packed xfer_mask.
862 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900863unsigned long ata_pack_xfermask(unsigned long pio_mask,
864 unsigned long mwdma_mask,
865 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900866{
867 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
868 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
869 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
870}
871
Tejun Heoc0489e42006-03-24 14:07:49 +0900872/**
873 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
874 * @xfer_mask: xfer_mask to unpack
875 * @pio_mask: resulting pio_mask
876 * @mwdma_mask: resulting mwdma_mask
877 * @udma_mask: resulting udma_mask
878 *
879 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
880 * Any NULL distination masks will be ignored.
881 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900882void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
883 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900884{
885 if (pio_mask)
886 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
887 if (mwdma_mask)
888 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
889 if (udma_mask)
890 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
891}
892
Tejun Heocb95d562006-03-06 04:31:56 +0900893static const struct ata_xfer_ent {
Tejun Heobe9a50c82006-03-31 22:48:52 +0900894 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900895 u8 base;
896} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900897 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
898 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
899 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900900 { -1, },
901};
902
903/**
904 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
905 * @xfer_mask: xfer_mask of interest
906 *
907 * Return matching XFER_* value for @xfer_mask. Only the highest
908 * bit of @xfer_mask is considered.
909 *
910 * LOCKING:
911 * None.
912 *
913 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900914 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900915 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900916u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900917{
918 int highbit = fls(xfer_mask) - 1;
919 const struct ata_xfer_ent *ent;
920
921 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
922 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
923 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900924 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900925}
926
927/**
928 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
929 * @xfer_mode: XFER_* of interest
930 *
931 * Return matching xfer_mask for @xfer_mode.
932 *
933 * LOCKING:
934 * None.
935 *
936 * RETURNS:
937 * Matching xfer_mask, 0 if no match found.
938 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900939unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900940{
941 const struct ata_xfer_ent *ent;
942
943 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
944 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900945 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
946 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900947 return 0;
948}
949
950/**
951 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
952 * @xfer_mode: XFER_* of interest
953 *
954 * Return matching xfer_shift for @xfer_mode.
955 *
956 * LOCKING:
957 * None.
958 *
959 * RETURNS:
960 * Matching xfer_shift, -1 if no match found.
961 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900962int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900963{
964 const struct ata_xfer_ent *ent;
965
966 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
967 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
968 return ent->shift;
969 return -1;
970}
971
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900973 * ata_mode_string - convert xfer_mask to string
974 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 *
976 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900977 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 *
979 * LOCKING:
980 * None.
981 *
982 * RETURNS:
983 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900984 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900986const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987{
Tejun Heo75f554b2006-03-06 04:31:57 +0900988 static const char * const xfer_mode_str[] = {
989 "PIO0",
990 "PIO1",
991 "PIO2",
992 "PIO3",
993 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100994 "PIO5",
995 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900996 "MWDMA0",
997 "MWDMA1",
998 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100999 "MWDMA3",
1000 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +09001001 "UDMA/16",
1002 "UDMA/25",
1003 "UDMA/33",
1004 "UDMA/44",
1005 "UDMA/66",
1006 "UDMA/100",
1007 "UDMA/133",
1008 "UDMA7",
1009 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001010 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001012 highbit = fls(xfer_mask) - 1;
1013 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1014 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016}
1017
Gwendal Grignoud9027472010-05-25 12:31:38 -07001018const char *sata_spd_string(unsigned int spd)
Tejun Heo4c360c82006-04-01 01:38:17 +09001019{
1020 static const char * const spd_str[] = {
1021 "1.5 Gbps",
1022 "3.0 Gbps",
Shane Huang8522ee22008-12-30 11:00:37 +08001023 "6.0 Gbps",
Tejun Heo4c360c82006-04-01 01:38:17 +09001024 };
1025
1026 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1027 return "<unknown>";
1028 return spd_str[spd - 1];
1029}
1030
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031/**
1032 * ata_dev_classify - determine device type based on ATA-spec signature
1033 * @tf: ATA taskfile register set for device to be identified
1034 *
1035 * Determine from taskfile register contents whether a device is
1036 * ATA or ATAPI, as per "Signature and persistence" section
1037 * of ATA/PI spec (volume 1, sect 5.14).
1038 *
1039 * LOCKING:
1040 * None.
1041 *
1042 * RETURNS:
Tejun Heo633273a2007-09-23 13:19:54 +09001043 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1044 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 */
Jeff Garzik057ace52005-10-22 14:27:05 -04001046unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047{
1048 /* Apple's open source Darwin code hints that some devices only
1049 * put a proper signature into the LBA mid/high registers,
1050 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a2007-09-23 13:19:54 +09001051 *
1052 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1053 * signatures for ATA and ATAPI devices attached on SerialATA,
1054 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1055 * spec has never mentioned about using different signatures
1056 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1057 * Multiplier specification began to use 0x69/0x96 to identify
1058 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1059 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1060 * 0x69/0x96 shortly and described them as reserved for
1061 * SerialATA.
1062 *
1063 * We follow the current spec and consider that 0x69/0x96
1064 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Tejun Heo79b42ba2009-04-15 06:21:10 +09001065 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1066 * SEMB signature. This is worked around in
1067 * ata_dev_read_id().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 */
Tejun Heo633273a2007-09-23 13:19:54 +09001069 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 DPRINTK("found ATA device by sig\n");
1071 return ATA_DEV_ATA;
1072 }
1073
Tejun Heo633273a2007-09-23 13:19:54 +09001074 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 DPRINTK("found ATAPI device by sig\n");
1076 return ATA_DEV_ATAPI;
1077 }
1078
Tejun Heo633273a2007-09-23 13:19:54 +09001079 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1080 DPRINTK("found PMP device by sig\n");
1081 return ATA_DEV_PMP;
1082 }
1083
1084 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001085 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1086 return ATA_DEV_SEMB;
Tejun Heo633273a2007-09-23 13:19:54 +09001087 }
1088
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 DPRINTK("unknown device\n");
1090 return ATA_DEV_UNKNOWN;
1091}
1092
1093/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001094 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 * @id: IDENTIFY DEVICE results we will examine
1096 * @s: string into which data is output
1097 * @ofs: offset into identify device page
1098 * @len: length of string to return. must be an even number.
1099 *
1100 * The strings in the IDENTIFY DEVICE page are broken up into
1101 * 16-bit chunks. Run through the string, and output each
1102 * 8-bit chunk linearly, regardless of platform.
1103 *
1104 * LOCKING:
1105 * caller.
1106 */
1107
Tejun Heo6a62a042006-02-13 10:02:46 +09001108void ata_id_string(const u16 *id, unsigned char *s,
1109 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110{
1111 unsigned int c;
1112
Alan Cox963e4972008-07-24 17:16:06 +01001113 BUG_ON(len & 1);
1114
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 while (len > 0) {
1116 c = id[ofs] >> 8;
1117 *s = c;
1118 s++;
1119
1120 c = id[ofs] & 0xff;
1121 *s = c;
1122 s++;
1123
1124 ofs++;
1125 len -= 2;
1126 }
1127}
1128
Tejun Heo0e949ff2006-02-12 22:47:04 +09001129/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001130 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001131 * @id: IDENTIFY DEVICE results we will examine
1132 * @s: string into which data is output
1133 * @ofs: offset into identify device page
1134 * @len: length of string to return. must be an odd number.
1135 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001136 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001137 * trims trailing spaces and terminates the resulting string with
1138 * null. @len must be actual maximum length (even number) + 1.
1139 *
1140 * LOCKING:
1141 * caller.
1142 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001143void ata_id_c_string(const u16 *id, unsigned char *s,
1144 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001145{
1146 unsigned char *p;
1147
Tejun Heo6a62a042006-02-13 10:02:46 +09001148 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001149
1150 p = s + strnlen(s, len - 1);
1151 while (p > s && p[-1] == ' ')
1152 p--;
1153 *p = '\0';
1154}
Edward Falk0baab862005-06-02 18:17:13 -04001155
Tejun Heodb6f8752007-09-03 12:31:58 +09001156static u64 ata_id_n_sectors(const u16 *id)
1157{
1158 if (ata_id_has_lba(id)) {
1159 if (ata_id_has_lba48(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001160 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
Tejun Heodb6f8752007-09-03 12:31:58 +09001161 else
Robert Hancock968e5942009-02-16 20:15:08 -06001162 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
Tejun Heodb6f8752007-09-03 12:31:58 +09001163 } else {
1164 if (ata_id_current_chs_valid(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001165 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1166 id[ATA_ID_CUR_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001167 else
Robert Hancock968e5942009-02-16 20:15:08 -06001168 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1169 id[ATA_ID_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001170 }
1171}
1172
Tejun Heoa5987e02008-03-27 19:14:23 +09001173u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001174{
1175 u64 sectors = 0;
1176
1177 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1178 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
Roland Dreierba14a9c2008-10-28 16:52:20 -07001179 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
Alan Cox1e999732007-04-11 00:23:13 +01001180 sectors |= (tf->lbah & 0xff) << 16;
1181 sectors |= (tf->lbam & 0xff) << 8;
1182 sectors |= (tf->lbal & 0xff);
1183
Tejun Heoa5987e02008-03-27 19:14:23 +09001184 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001185}
1186
Tejun Heoa5987e02008-03-27 19:14:23 +09001187u64 ata_tf_to_lba(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001188{
1189 u64 sectors = 0;
1190
1191 sectors |= (tf->device & 0x0f) << 24;
1192 sectors |= (tf->lbah & 0xff) << 16;
1193 sectors |= (tf->lbam & 0xff) << 8;
1194 sectors |= (tf->lbal & 0xff);
1195
Tejun Heoa5987e02008-03-27 19:14:23 +09001196 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001197}
1198
1199/**
Tejun Heoc728a912007-09-03 12:32:30 +09001200 * ata_read_native_max_address - Read native max address
1201 * @dev: target device
1202 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001203 *
Tejun Heoc728a912007-09-03 12:32:30 +09001204 * Perform an LBA48 or LBA28 native size query upon the device in
1205 * question.
1206 *
1207 * RETURNS:
1208 * 0 on success, -EACCES if command is aborted by the drive.
1209 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001210 */
Tejun Heoc728a912007-09-03 12:32:30 +09001211static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001212{
Tejun Heoc728a912007-09-03 12:32:30 +09001213 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001214 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001215 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001216
1217 ata_tf_init(dev, &tf);
1218
Tejun Heoc728a912007-09-03 12:32:30 +09001219 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001220 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001221
1222 if (lba48) {
1223 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1224 tf.flags |= ATA_TFLAG_LBA48;
1225 } else
1226 tf.command = ATA_CMD_READ_NATIVE_MAX;
1227
Alan Cox1e999732007-04-11 00:23:13 +01001228 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001229 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001230
Tejun Heo2b789102007-10-09 15:05:44 +09001231 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001232 if (err_mask) {
1233 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1234 "max address (err_mask=0x%x)\n", err_mask);
1235 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1236 return -EACCES;
1237 return -EIO;
1238 }
Alan Cox1e999732007-04-11 00:23:13 +01001239
Tejun Heoc728a912007-09-03 12:32:30 +09001240 if (lba48)
Tejun Heoa5987e02008-03-27 19:14:23 +09001241 *max_sectors = ata_tf_to_lba48(&tf) + 1;
Tejun Heoc728a912007-09-03 12:32:30 +09001242 else
Tejun Heoa5987e02008-03-27 19:14:23 +09001243 *max_sectors = ata_tf_to_lba(&tf) + 1;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001244 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001245 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001246 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001247}
1248
1249/**
Tejun Heoc728a912007-09-03 12:32:30 +09001250 * ata_set_max_sectors - Set max sectors
1251 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001252 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001253 *
Tejun Heoc728a912007-09-03 12:32:30 +09001254 * Set max sectors of @dev to @new_sectors.
1255 *
1256 * RETURNS:
1257 * 0 on success, -EACCES if command is aborted or denied (due to
1258 * previous non-volatile SET_MAX) by the drive. -EIO on other
1259 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001260 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001261static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001262{
Tejun Heoc728a912007-09-03 12:32:30 +09001263 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001264 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001265 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001266
1267 new_sectors--;
1268
1269 ata_tf_init(dev, &tf);
1270
Alan Cox1e999732007-04-11 00:23:13 +01001271 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001272
1273 if (lba48) {
1274 tf.command = ATA_CMD_SET_MAX_EXT;
1275 tf.flags |= ATA_TFLAG_LBA48;
1276
1277 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1278 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1279 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001280 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001281 tf.command = ATA_CMD_SET_MAX;
1282
Tejun Heo1e582ba2007-09-21 20:07:14 +09001283 tf.device |= (new_sectors >> 24) & 0xf;
1284 }
1285
Alan Cox1e999732007-04-11 00:23:13 +01001286 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001287 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001288
1289 tf.lbal = (new_sectors >> 0) & 0xff;
1290 tf.lbam = (new_sectors >> 8) & 0xff;
1291 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001292
Tejun Heo2b789102007-10-09 15:05:44 +09001293 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001294 if (err_mask) {
1295 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1296 "max address (err_mask=0x%x)\n", err_mask);
1297 if (err_mask == AC_ERR_DEV &&
1298 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1299 return -EACCES;
1300 return -EIO;
1301 }
Alan Cox1e999732007-04-11 00:23:13 +01001302
Tejun Heoc728a912007-09-03 12:32:30 +09001303 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001304}
1305
1306/**
1307 * ata_hpa_resize - Resize a device with an HPA set
1308 * @dev: Device to resize
1309 *
1310 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1311 * it if required to the full size of the media. The caller must check
1312 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001313 *
1314 * RETURNS:
1315 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001316 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001317static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001318{
Tejun Heo05027ad2007-09-03 12:32:57 +09001319 struct ata_eh_context *ehc = &dev->link->eh_context;
1320 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo445d2112010-04-05 10:33:13 +09001321 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
Tejun Heo05027ad2007-09-03 12:32:57 +09001322 u64 sectors = ata_id_n_sectors(dev->id);
1323 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001324 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001325
Tejun Heo05027ad2007-09-03 12:32:57 +09001326 /* do we need to do it? */
1327 if (dev->class != ATA_DEV_ATA ||
1328 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1329 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001330 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001331
Tejun Heo05027ad2007-09-03 12:32:57 +09001332 /* read native max address */
1333 rc = ata_read_native_max_address(dev, &native_sectors);
1334 if (rc) {
Tejun Heodda7aba2008-03-23 21:05:15 +09001335 /* If device aborted the command or HPA isn't going to
1336 * be unlocked, skip HPA resizing.
Tejun Heo05027ad2007-09-03 12:32:57 +09001337 */
Tejun Heo445d2112010-04-05 10:33:13 +09001338 if (rc == -EACCES || !unlock_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001339 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
Tejun Heodda7aba2008-03-23 21:05:15 +09001340 "broken, skipping HPA handling\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001341 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001342
Tejun Heo05027ad2007-09-03 12:32:57 +09001343 /* we can continue if device aborted the command */
1344 if (rc == -EACCES)
1345 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001346 }
Tejun Heo37301a52007-06-25 20:45:54 +09001347
Tejun Heo05027ad2007-09-03 12:32:57 +09001348 return rc;
1349 }
Tejun Heo5920dad2009-07-15 17:11:41 +09001350 dev->n_native_sectors = native_sectors;
Tejun Heo05027ad2007-09-03 12:32:57 +09001351
1352 /* nothing to do? */
Tejun Heo445d2112010-04-05 10:33:13 +09001353 if (native_sectors <= sectors || !unlock_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001354 if (!print_info || native_sectors == sectors)
1355 return 0;
1356
1357 if (native_sectors > sectors)
1358 ata_dev_printk(dev, KERN_INFO,
1359 "HPA detected: current %llu, native %llu\n",
1360 (unsigned long long)sectors,
1361 (unsigned long long)native_sectors);
1362 else if (native_sectors < sectors)
1363 ata_dev_printk(dev, KERN_WARNING,
1364 "native sectors (%llu) is smaller than "
1365 "sectors (%llu)\n",
1366 (unsigned long long)native_sectors,
1367 (unsigned long long)sectors);
1368 return 0;
1369 }
1370
1371 /* let's unlock HPA */
1372 rc = ata_set_max_sectors(dev, native_sectors);
1373 if (rc == -EACCES) {
1374 /* if device aborted the command, skip HPA resizing */
1375 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1376 "(%llu -> %llu), skipping HPA handling\n",
1377 (unsigned long long)sectors,
1378 (unsigned long long)native_sectors);
1379 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1380 return 0;
1381 } else if (rc)
1382 return rc;
1383
1384 /* re-read IDENTIFY data */
1385 rc = ata_dev_reread_id(dev, 0);
1386 if (rc) {
1387 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1388 "data after HPA resizing\n");
1389 return rc;
1390 }
1391
1392 if (print_info) {
1393 u64 new_sectors = ata_id_n_sectors(dev->id);
1394 ata_dev_printk(dev, KERN_INFO,
1395 "HPA unlocked: %llu -> %llu, native %llu\n",
1396 (unsigned long long)sectors,
1397 (unsigned long long)new_sectors,
1398 (unsigned long long)native_sectors);
1399 }
1400
1401 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001402}
1403
Edward Falk0baab862005-06-02 18:17:13 -04001404/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001406 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001408 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1409 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 *
1411 * LOCKING:
1412 * caller.
1413 */
1414
Tejun Heo0bd33002006-02-12 22:47:05 +09001415static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416{
1417 DPRINTK("49==0x%04x "
1418 "53==0x%04x "
1419 "63==0x%04x "
1420 "64==0x%04x "
1421 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001422 id[49],
1423 id[53],
1424 id[63],
1425 id[64],
1426 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 DPRINTK("80==0x%04x "
1428 "81==0x%04x "
1429 "82==0x%04x "
1430 "83==0x%04x "
1431 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001432 id[80],
1433 id[81],
1434 id[82],
1435 id[83],
1436 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 DPRINTK("88==0x%04x "
1438 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001439 id[88],
1440 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441}
1442
Tejun Heocb95d562006-03-06 04:31:56 +09001443/**
1444 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1445 * @id: IDENTIFY data to compute xfer mask from
1446 *
1447 * Compute the xfermask for this device. This is not as trivial
1448 * as it seems if we must consider early devices correctly.
1449 *
1450 * FIXME: pre IDE drive timing (do we care ?).
1451 *
1452 * LOCKING:
1453 * None.
1454 *
1455 * RETURNS:
1456 * Computed xfermask
1457 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001458unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001459{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001460 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001461
1462 /* Usual case. Word 53 indicates word 64 is valid */
1463 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1464 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1465 pio_mask <<= 3;
1466 pio_mask |= 0x7;
1467 } else {
1468 /* If word 64 isn't valid then Word 51 high byte holds
1469 * the PIO timing number for the maximum. Turn it into
1470 * a mask.
1471 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001472 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001473 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001474 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001475 else
1476 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001477
1478 /* But wait.. there's more. Design your standards by
1479 * committee and you too can get a free iordy field to
1480 * process. However its the speeds not the modes that
1481 * are supported... Note drivers using the timing API
1482 * will get this right anyway
1483 */
1484 }
1485
1486 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001487
Alan Coxb352e572006-08-10 18:52:12 +01001488 if (ata_id_is_cfa(id)) {
1489 /*
1490 * Process compact flash extended modes
1491 */
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04001492 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1493 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
Alan Coxb352e572006-08-10 18:52:12 +01001494
1495 if (pio)
1496 pio_mask |= (1 << 5);
1497 if (pio > 1)
1498 pio_mask |= (1 << 6);
1499 if (dma)
1500 mwdma_mask |= (1 << 3);
1501 if (dma > 1)
1502 mwdma_mask |= (1 << 4);
1503 }
1504
Tejun Heofb21f0d2006-03-12 12:34:35 +09001505 udma_mask = 0;
1506 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1507 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001508
1509 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1510}
1511
Adrian Bunk7102d232007-01-04 00:09:36 +01001512static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001513{
Tejun Heo77853bf2006-01-23 13:09:36 +09001514 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001515
Tejun Heoa2a7a662005-12-13 14:48:31 +09001516 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001517}
1518
1519/**
Tejun Heo24326972006-11-14 22:47:09 +09001520 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001521 * @dev: Device to which the command is sent
1522 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001523 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001524 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001525 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001526 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001527 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001528 *
1529 * Executes libata internal command with timeout. @tf contains
1530 * command on entry and result on return. Timeout and error
1531 * conditions are reported via return value. No recovery action
1532 * is taken after a command times out. It's caller's duty to
1533 * clean up after timeout.
1534 *
1535 * LOCKING:
1536 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001537 *
1538 * RETURNS:
1539 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001540 */
Tejun Heo24326972006-11-14 22:47:09 +09001541unsigned ata_exec_internal_sg(struct ata_device *dev,
1542 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001543 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001544 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001545{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001546 struct ata_link *link = dev->link;
1547 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001548 u8 command = tf->command;
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001549 int auto_timeout = 0;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001550 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001551 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001552 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001553 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001554 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001555 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001556 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001557 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001558
Jeff Garzikba6a1302006-06-22 23:46:10 -04001559 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001560
Tejun Heoe3180492006-05-15 20:58:09 +09001561 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001562 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001563 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001564 return AC_ERR_SYSTEM;
1565 }
1566
Tejun Heo2ab7db12006-05-15 20:58:02 +09001567 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001568
Tejun Heo2ab7db12006-05-15 20:58:02 +09001569 /* XXX: Tag 0 is used for drivers with legacy EH as some
1570 * drivers choke if any other tag is given. This breaks
1571 * ata_tag_internal() test for those drivers. Don't use new
1572 * EH stuff without converting to it.
1573 */
1574 if (ap->ops->error_handler)
1575 tag = ATA_TAG_INTERNAL;
1576 else
1577 tag = 0;
1578
Tejun Heo8a8bc222008-11-10 14:48:21 +09001579 if (test_and_set_bit(tag, &ap->qc_allocated))
1580 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001581 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001582
1583 qc->tag = tag;
1584 qc->scsicmd = NULL;
1585 qc->ap = ap;
1586 qc->dev = dev;
1587 ata_qc_reinit(qc);
1588
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001589 preempted_tag = link->active_tag;
1590 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001591 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001592 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001593 link->active_tag = ATA_TAG_POISON;
1594 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001595 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001596 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001597
1598 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001599 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001600 if (cdb)
1601 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001602 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001603 qc->dma_dir = dma_dir;
1604 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001605 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001606 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001607
Jens Axboe87260212007-10-16 11:14:12 +02001608 for_each_sg(sgl, sg, n_elem, i)
1609 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001610
Jens Axboe87260212007-10-16 11:14:12 +02001611 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001612 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001613 }
1614
Tejun Heo77853bf2006-01-23 13:09:36 +09001615 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001616 qc->complete_fn = ata_qc_complete_internal;
1617
Tejun Heo8e0e6942006-03-31 20:41:11 +09001618 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001619
Jeff Garzikba6a1302006-06-22 23:46:10 -04001620 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001621
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001622 if (!timeout) {
1623 if (ata_probe_timeout)
1624 timeout = ata_probe_timeout * 1000;
1625 else {
1626 timeout = ata_internal_cmd_timeout(dev, command);
1627 auto_timeout = 1;
1628 }
1629 }
Tejun Heo2b789102007-10-09 15:05:44 +09001630
Tejun Heoc0c362b2010-09-06 17:57:14 +02001631 if (ap->ops->error_handler)
1632 ata_eh_release(ap);
1633
Tejun Heo2b789102007-10-09 15:05:44 +09001634 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001635
Tejun Heoc0c362b2010-09-06 17:57:14 +02001636 if (ap->ops->error_handler)
1637 ata_eh_acquire(ap);
1638
Tejun Heoc4291372010-05-10 21:41:38 +02001639 ata_sff_flush_pio_task(ap);
Tejun Heod95a7172006-05-15 20:58:14 +09001640
1641 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001642 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001643
1644 /* We're racing with irq here. If we lose, the
1645 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001646 * twice. If we win, the port is frozen and will be
1647 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001648 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001649 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001650 qc->err_mask |= AC_ERR_TIMEOUT;
1651
1652 if (ap->ops->error_handler)
1653 ata_port_freeze(ap);
1654 else
1655 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001656
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001657 if (ata_msg_warn(ap))
1658 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001659 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001660 }
1661
Jeff Garzikba6a1302006-06-22 23:46:10 -04001662 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001663 }
1664
Tejun Heod95a7172006-05-15 20:58:14 +09001665 /* do post_internal_cmd */
1666 if (ap->ops->post_internal_cmd)
1667 ap->ops->post_internal_cmd(qc);
1668
Tejun Heoa51d6442007-03-20 15:24:11 +09001669 /* perform minimal error analysis */
1670 if (qc->flags & ATA_QCFLAG_FAILED) {
1671 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1672 qc->err_mask |= AC_ERR_DEV;
1673
1674 if (!qc->err_mask)
1675 qc->err_mask |= AC_ERR_OTHER;
1676
1677 if (qc->err_mask & ~AC_ERR_OTHER)
1678 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001679 }
1680
Tejun Heo15869302006-05-15 20:57:33 +09001681 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001682 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001683
Tejun Heoe61e0672006-05-15 20:57:40 +09001684 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001685 err_mask = qc->err_mask;
1686
1687 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001688 link->active_tag = preempted_tag;
1689 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001690 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001691 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001692
Jeff Garzikba6a1302006-06-22 23:46:10 -04001693 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001694
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001695 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1696 ata_internal_cmd_timed_out(dev, command);
1697
Tejun Heo77853bf2006-01-23 13:09:36 +09001698 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001699}
1700
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701/**
Tejun Heo33480a02006-12-12 02:15:31 +09001702 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001703 * @dev: Device to which the command is sent
1704 * @tf: Taskfile registers for the command and the result
1705 * @cdb: CDB for packet command
1706 * @dma_dir: Data tranfer direction of the command
1707 * @buf: Data buffer of the command
1708 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001709 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001710 *
1711 * Wrapper around ata_exec_internal_sg() which takes simple
1712 * buffer instead of sg list.
1713 *
1714 * LOCKING:
1715 * None. Should be called with kernel context, might sleep.
1716 *
1717 * RETURNS:
1718 * Zero on success, AC_ERR_* mask on failure
1719 */
1720unsigned ata_exec_internal(struct ata_device *dev,
1721 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001722 int dma_dir, void *buf, unsigned int buflen,
1723 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001724{
Tejun Heo33480a02006-12-12 02:15:31 +09001725 struct scatterlist *psg = NULL, sg;
1726 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001727
Tejun Heo33480a02006-12-12 02:15:31 +09001728 if (dma_dir != DMA_NONE) {
1729 WARN_ON(!buf);
1730 sg_init_one(&sg, buf, buflen);
1731 psg = &sg;
1732 n_elem++;
1733 }
Tejun Heo24326972006-11-14 22:47:09 +09001734
Tejun Heo2b789102007-10-09 15:05:44 +09001735 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1736 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001737}
1738
1739/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001740 * ata_do_simple_cmd - execute simple internal command
1741 * @dev: Device to which the command is sent
1742 * @cmd: Opcode to execute
1743 *
1744 * Execute a 'simple' command, that only consists of the opcode
1745 * 'cmd' itself, without filling any other registers
1746 *
1747 * LOCKING:
1748 * Kernel thread context (may sleep).
1749 *
1750 * RETURNS:
1751 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001752 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001753unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001754{
1755 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001756
1757 ata_tf_init(dev, &tf);
1758
1759 tf.command = cmd;
1760 tf.flags |= ATA_TFLAG_DEVICE;
1761 tf.protocol = ATA_PROT_NODATA;
1762
Tejun Heo2b789102007-10-09 15:05:44 +09001763 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001764}
1765
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001767 * ata_pio_need_iordy - check if iordy needed
1768 * @adev: ATA device
1769 *
1770 * Check if the current speed of the device requires IORDY. Used
1771 * by various controllers for chip configuration.
1772 */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001773unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1774{
Tejun Heo0d9e6652009-06-11 11:04:45 +09001775 /* Don't set IORDY if we're preparing for reset. IORDY may
1776 * lead to controller lock up on certain controllers if the
1777 * port is not occupied. See bko#11703 for details.
1778 */
1779 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1780 return 0;
1781 /* Controller doesn't support IORDY. Probably a pointless
1782 * check as the caller should know this.
1783 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001784 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001785 return 0;
David Daney5c18c4d2008-12-10 15:39:12 -08001786 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1787 if (ata_id_is_cfa(adev->id)
1788 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1789 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001790 /* PIO3 and higher it is mandatory */
1791 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001792 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001793 /* We turn it on when possible */
1794 if (ata_id_has_iordy(adev->id))
1795 return 1;
1796 return 0;
1797}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001798
Alan Cox432729f2007-03-08 23:22:59 +00001799/**
1800 * ata_pio_mask_no_iordy - Return the non IORDY mask
1801 * @adev: ATA device
1802 *
1803 * Compute the highest mode possible if we are not using iordy. Return
1804 * -1 if no iordy mode is available.
1805 */
Alan Cox432729f2007-03-08 23:22:59 +00001806static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1807{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001808 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001809 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001810 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001811 /* Is the speed faster than the drive allows non IORDY ? */
1812 if (pio) {
1813 /* This is cycle times not frequency - watch the logic! */
1814 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001815 return 3 << ATA_SHIFT_PIO;
1816 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001817 }
1818 }
Alan Cox432729f2007-03-08 23:22:59 +00001819 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001820}
1821
1822/**
Alan Cox963e4972008-07-24 17:16:06 +01001823 * ata_do_dev_read_id - default ID read method
1824 * @dev: device
1825 * @tf: proposed taskfile
1826 * @id: data buffer
1827 *
1828 * Issue the identify taskfile and hand back the buffer containing
1829 * identify data. For some RAID controllers and for pre ATA devices
1830 * this function is wrapped or replaced by the driver
1831 */
1832unsigned int ata_do_dev_read_id(struct ata_device *dev,
1833 struct ata_taskfile *tf, u16 *id)
1834{
1835 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1836 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1837}
1838
1839/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001840 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001841 * @dev: target device
1842 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001843 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001844 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001845 *
1846 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1847 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001848 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1849 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001850 *
Alan Cox50a99012007-08-08 14:27:00 +01001851 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001852 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01001853 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001854 * LOCKING:
1855 * Kernel thread context (may sleep)
1856 *
1857 * RETURNS:
1858 * 0 on success, -errno otherwise.
1859 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001860int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001861 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001862{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001863 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001864 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001865 struct ata_taskfile tf;
1866 unsigned int err_mask = 0;
1867 const char *reason;
Tejun Heo79b42ba2009-04-15 06:21:10 +09001868 bool is_semb = class == ATA_DEV_SEMB;
Tejun Heo54936f82007-05-11 14:35:29 +02001869 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09001870 int rc;
1871
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001872 if (ata_msg_ctl(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08001873 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001874
Alan Cox963e4972008-07-24 17:16:06 +01001875retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001876 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001877
1878 switch (class) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001879 case ATA_DEV_SEMB:
1880 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
Tejun Heo49016ac2006-02-21 02:12:11 +09001881 case ATA_DEV_ATA:
1882 tf.command = ATA_CMD_ID_ATA;
1883 break;
1884 case ATA_DEV_ATAPI:
1885 tf.command = ATA_CMD_ID_ATAPI;
1886 break;
1887 default:
1888 rc = -ENODEV;
1889 reason = "unsupported class";
1890 goto err_out;
1891 }
1892
1893 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001894
1895 /* Some devices choke if TF registers contain garbage. Make
1896 * sure those are properly initialized.
1897 */
1898 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1899
1900 /* Device presence detection is unreliable on some
1901 * controllers. Always poll IDENTIFY if available.
1902 */
1903 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001904
Alan Cox963e4972008-07-24 17:16:06 +01001905 if (ap->ops->read_id)
1906 err_mask = ap->ops->read_id(dev, &tf, id);
1907 else
1908 err_mask = ata_do_dev_read_id(dev, &tf, id);
1909
Tejun Heo49016ac2006-02-21 02:12:11 +09001910 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001911 if (err_mask & AC_ERR_NODEV_HINT) {
Tejun Heo1ffc1512008-03-23 15:16:53 +09001912 ata_dev_printk(dev, KERN_DEBUG,
1913 "NODEV after polling detection\n");
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001914 return -ENOENT;
1915 }
1916
Tejun Heo79b42ba2009-04-15 06:21:10 +09001917 if (is_semb) {
1918 ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on "
1919 "device w/ SEMB sig, disabled\n");
1920 /* SEMB is not supported yet */
1921 *p_class = ATA_DEV_SEMB_UNSUP;
1922 return 0;
1923 }
1924
Tejun Heo1ffc1512008-03-23 15:16:53 +09001925 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1926 /* Device or controller might have reported
1927 * the wrong device class. Give a shot at the
1928 * other IDENTIFY if the current one is
1929 * aborted by the device.
1930 */
1931 if (may_fallback) {
1932 may_fallback = 0;
Tejun Heo54936f82007-05-11 14:35:29 +02001933
Tejun Heo1ffc1512008-03-23 15:16:53 +09001934 if (class == ATA_DEV_ATA)
1935 class = ATA_DEV_ATAPI;
1936 else
1937 class = ATA_DEV_ATA;
1938 goto retry;
1939 }
1940
1941 /* Control reaches here iff the device aborted
1942 * both flavors of IDENTIFYs which happens
1943 * sometimes with phantom devices.
1944 */
1945 ata_dev_printk(dev, KERN_DEBUG,
1946 "both IDENTIFYs aborted, assuming NODEV\n");
1947 return -ENOENT;
Tejun Heo54936f82007-05-11 14:35:29 +02001948 }
1949
Tejun Heo49016ac2006-02-21 02:12:11 +09001950 rc = -EIO;
1951 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001952 goto err_out;
1953 }
1954
Tejun Heo43c9c592010-05-23 12:59:11 +02001955 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1956 ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, "
1957 "class=%d may_fallback=%d tried_spinup=%d\n",
1958 class, may_fallback, tried_spinup);
1959 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1960 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1961 }
1962
Tejun Heo54936f82007-05-11 14:35:29 +02001963 /* Falling back doesn't make sense if ID data was read
1964 * successfully at least once.
1965 */
1966 may_fallback = 0;
1967
Tejun Heo49016ac2006-02-21 02:12:11 +09001968 swap_buf_le16(id, ATA_ID_WORDS);
1969
Tejun Heo49016ac2006-02-21 02:12:11 +09001970 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001971 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01001972 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07001973
1974 if (class == ATA_DEV_ATA) {
1975 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1976 goto err_out;
1977 } else {
1978 if (ata_id_is_ata(id))
1979 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001980 }
1981
Mark Lord169439c2007-04-17 18:26:07 -04001982 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1983 tried_spinup = 1;
1984 /*
1985 * Drive powered-up in standby mode, and requires a specific
1986 * SET_FEATURES spin-up subcommand before it will accept
1987 * anything other than the original IDENTIFY command.
1988 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04001989 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07001990 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04001991 rc = -EIO;
1992 reason = "SPINUP failed";
1993 goto err_out;
1994 }
1995 /*
1996 * If the drive initially returned incomplete IDENTIFY info,
1997 * we now must reissue the IDENTIFY command.
1998 */
1999 if (id[2] == 0x37c8)
2000 goto retry;
2001 }
2002
Tejun Heobff04642006-11-10 18:08:10 +09002003 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09002004 /*
2005 * The exact sequence expected by certain pre-ATA4 drives is:
2006 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01002007 * IDENTIFY (optional in early ATA)
2008 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09002009 * anything else..
2010 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01002011 *
2012 * Note that ATA4 says lba is mandatory so the second check
Adam Buchbinderc9404c92009-12-18 15:40:42 -05002013 * should never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09002014 */
2015 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09002016 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09002017 if (err_mask) {
2018 rc = -EIO;
2019 reason = "INIT_DEV_PARAMS failed";
2020 goto err_out;
2021 }
2022
2023 /* current CHS translation info (id[53-58]) might be
2024 * changed. reread the identify device info.
2025 */
Tejun Heobff04642006-11-10 18:08:10 +09002026 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09002027 goto retry;
2028 }
2029 }
2030
2031 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09002032
Tejun Heo49016ac2006-02-21 02:12:11 +09002033 return 0;
2034
2035 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09002036 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002037 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09002038 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002039 return rc;
2040}
2041
Tejun Heo90627122009-01-29 20:31:36 +09002042static int ata_do_link_spd_horkage(struct ata_device *dev)
2043{
2044 struct ata_link *plink = ata_dev_phys_link(dev);
2045 u32 target, target_limit;
2046
2047 if (!sata_scr_valid(plink))
2048 return 0;
2049
2050 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2051 target = 1;
2052 else
2053 return 0;
2054
2055 target_limit = (1 << target) - 1;
2056
2057 /* if already on stricter limit, no need to push further */
2058 if (plink->sata_spd_limit <= target_limit)
2059 return 0;
2060
2061 plink->sata_spd_limit = target_limit;
2062
2063 /* Request another EH round by returning -EAGAIN if link is
2064 * going faster than the target speed. Forward progress is
2065 * guaranteed by setting sata_spd_limit to target_limit above.
2066 */
2067 if (plink->sata_spd > target) {
2068 ata_dev_printk(dev, KERN_INFO,
2069 "applying link speed limit horkage to %s\n",
2070 sata_spd_string(target));
2071 return -EAGAIN;
2072 }
2073 return 0;
2074}
2075
Tejun Heo3373efd2006-05-15 20:57:53 +09002076static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002077{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002078 struct ata_port *ap = dev->link->ap;
Jens Axboe9ce8e302008-08-27 15:23:18 +02002079
2080 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2081 return 0;
2082
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002083 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002084}
2085
Shaohua Li388539f2009-07-27 09:24:35 +08002086static int ata_dev_config_ncq(struct ata_device *dev,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002087 char *desc, size_t desc_sz)
2088{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002089 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002090 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
Shaohua Li388539f2009-07-27 09:24:35 +08002091 unsigned int err_mask;
2092 char *aa_desc = "";
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002093
2094 if (!ata_id_has_ncq(dev->id)) {
2095 desc[0] = '\0';
Shaohua Li388539f2009-07-27 09:24:35 +08002096 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002097 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002098 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002099 snprintf(desc, desc_sz, "NCQ (not used)");
Shaohua Li388539f2009-07-27 09:24:35 +08002100 return 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07002101 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002102 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002103 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002104 dev->flags |= ATA_DFLAG_NCQ;
2105 }
2106
Shaohua Li388539f2009-07-27 09:24:35 +08002107 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2108 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2109 ata_id_has_fpdma_aa(dev->id)) {
2110 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2111 SATA_FPDMA_AA);
2112 if (err_mask) {
2113 ata_dev_printk(dev, KERN_ERR, "failed to enable AA"
2114 "(error_mask=0x%x)\n", err_mask);
2115 if (err_mask != AC_ERR_DEV) {
2116 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2117 return -EIO;
2118 }
2119 } else
2120 aa_desc = ", AA";
2121 }
2122
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002123 if (hdepth >= ddepth)
Shaohua Li388539f2009-07-27 09:24:35 +08002124 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002125 else
Shaohua Li388539f2009-07-27 09:24:35 +08002126 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2127 ddepth, aa_desc);
2128 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002129}
2130
Tejun Heo49016ac2006-02-21 02:12:11 +09002131/**
Tejun Heoffeae412006-03-01 16:09:35 +09002132 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002133 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 *
Tejun Heoffeae412006-03-01 16:09:35 +09002135 * Configure @dev according to @dev->id. Generic and low-level
2136 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 *
2138 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002139 * Kernel thread context (may sleep)
2140 *
2141 * RETURNS:
2142 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002144int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002146 struct ata_port *ap = dev->link->ap;
2147 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002148 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002149 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002150 unsigned long xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002151 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002152 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2153 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002154 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002156 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo44877b42007-02-21 01:06:51 +09002157 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002158 __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002159 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 }
2161
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002162 if (ata_msg_probe(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002163 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164
Tejun Heo75683fe2007-07-05 13:31:27 +09002165 /* set horkage */
2166 dev->horkage |= ata_dev_blacklisted(dev);
Tejun Heo33267322008-02-13 09:15:09 +09002167 ata_force_horkage(dev);
Tejun Heo75683fe2007-07-05 13:31:27 +09002168
Tejun Heo50af2fa2008-05-19 01:15:14 +09002169 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2170 ata_dev_printk(dev, KERN_INFO,
2171 "unsupported device, disabling\n");
2172 ata_dev_disable(dev);
2173 return 0;
2174 }
2175
Tejun Heo2486fa52008-07-31 07:52:40 +09002176 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2177 dev->class == ATA_DEV_ATAPI) {
2178 ata_dev_printk(dev, KERN_WARNING,
2179 "WARNING: ATAPI is %s, device ignored.\n",
2180 atapi_enabled ? "not supported with this driver"
2181 : "disabled");
2182 ata_dev_disable(dev);
2183 return 0;
2184 }
2185
Tejun Heo90627122009-01-29 20:31:36 +09002186 rc = ata_do_link_spd_horkage(dev);
2187 if (rc)
2188 return rc;
2189
Tejun Heo67465442007-05-15 03:28:16 +09002190 /* let ACPI work its magic */
2191 rc = ata_acpi_on_devcfg(dev);
2192 if (rc)
2193 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002194
Tejun Heo05027ad2007-09-03 12:32:57 +09002195 /* massage HPA, do it early as it might change IDENTIFY data */
2196 rc = ata_hpa_resize(dev);
2197 if (rc)
2198 return rc;
2199
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002200 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002201 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002202 ata_dev_printk(dev, KERN_DEBUG,
2203 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2204 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002205 __func__,
Tejun Heof15a1da2006-05-15 20:57:56 +09002206 id[49], id[82], id[83], id[84],
2207 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002208
Tejun Heo208a9932006-03-05 17:55:58 +09002209 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002210 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002211 dev->max_sectors = 0;
2212 dev->cdb_len = 0;
2213 dev->n_sectors = 0;
2214 dev->cylinders = 0;
2215 dev->heads = 0;
2216 dev->sectors = 0;
Mark Lorde18086d2009-03-19 13:32:21 -04002217 dev->multi_count = 0;
Tejun Heo208a9932006-03-05 17:55:58 +09002218
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219 /*
2220 * common ATA, ATAPI feature tests
2221 */
2222
Tejun Heoff8854b2006-03-06 04:31:56 +09002223 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002224 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002226 if (ata_msg_probe(ap))
2227 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228
Albert Leeef143d52007-06-05 13:01:33 +08002229 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2230 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2231 sizeof(fwrevbuf));
2232
2233 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2234 sizeof(modelbuf));
2235
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236 /* ATA-specific feature tests */
2237 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002238 if (ata_id_is_cfa(id)) {
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04002239 /* CPRM may make this media unusable */
2240 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
Tejun Heo44877b42007-02-21 01:06:51 +09002241 ata_dev_printk(dev, KERN_WARNING,
2242 "supports DRM functions and may "
2243 "not be fully accessable.\n");
Alan Coxb352e572006-08-10 18:52:12 +01002244 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002245 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002246 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002247 /* Warn the user if the device has TPM extensions */
2248 if (ata_id_has_tpm(id))
2249 ata_dev_printk(dev, KERN_WARNING,
2250 "supports DRM functions and may "
2251 "not be fully accessable.\n");
2252 }
Alan Coxb352e572006-08-10 18:52:12 +01002253
Tejun Heo1148c3a2006-03-13 19:48:04 +09002254 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002255
Mark Lorde18086d2009-03-19 13:32:21 -04002256 /* get current R/W Multiple count setting */
2257 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2258 unsigned int max = dev->id[47] & 0xff;
2259 unsigned int cnt = dev->id[59] & 0xff;
2260 /* only recognize/allow powers of two here */
2261 if (is_power_of_2(max) && is_power_of_2(cnt))
2262 if (cnt <= max)
2263 dev->multi_count = cnt;
2264 }
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002265
Tejun Heo1148c3a2006-03-13 19:48:04 +09002266 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002267 const char *lba_desc;
Shaohua Li388539f2009-07-27 09:24:35 +08002268 char ncq_desc[24];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002269
Tejun Heo4c2d7212006-03-05 17:55:58 +09002270 lba_desc = "LBA";
2271 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002272 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002273 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002274 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002275
2276 if (dev->n_sectors >= (1UL << 28) &&
2277 ata_id_has_flush_ext(id))
2278 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002279 }
Albert Lee8bf62ec2005-05-12 15:29:42 -04002280
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002281 /* config NCQ */
Shaohua Li388539f2009-07-27 09:24:35 +08002282 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2283 if (rc)
2284 return rc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002285
Albert Lee8bf62ec2005-05-12 15:29:42 -04002286 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002287 if (ata_msg_drv(ap) && print_info) {
2288 ata_dev_printk(dev, KERN_INFO,
2289 "%s: %s, %s, max %s\n",
2290 revbuf, modelbuf, fwrevbuf,
2291 ata_mode_string(xfer_mask));
2292 ata_dev_printk(dev, KERN_INFO,
2293 "%Lu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002294 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002295 dev->multi_count, lba_desc, ncq_desc);
2296 }
Tejun Heoffeae412006-03-01 16:09:35 +09002297 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002298 /* CHS */
2299
2300 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002301 dev->cylinders = id[1];
2302 dev->heads = id[3];
2303 dev->sectors = id[6];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002304
Tejun Heo1148c3a2006-03-13 19:48:04 +09002305 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002306 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002307 dev->cylinders = id[54];
2308 dev->heads = id[55];
2309 dev->sectors = id[56];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002310 }
2311
2312 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002313 if (ata_msg_drv(ap) && print_info) {
Tejun Heo88574552006-06-25 20:00:35 +09002314 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002315 "%s: %s, %s, max %s\n",
2316 revbuf, modelbuf, fwrevbuf,
2317 ata_mode_string(xfer_mask));
Jeff Garzika84471f2007-02-26 05:51:33 -05002318 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002319 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2320 (unsigned long long)dev->n_sectors,
2321 dev->multi_count, dev->cylinders,
2322 dev->heads, dev->sectors);
2323 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002324 }
2325
Tejun Heo6e7846e2006-02-12 23:32:58 +09002326 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 }
2328
2329 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002330 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002331 const char *cdb_intr_string = "";
2332 const char *atapi_an_string = "";
Tejun Heo91163002008-02-21 13:25:50 +09002333 const char *dma_dir_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002334 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002335
Tejun Heo1148c3a2006-03-13 19:48:04 +09002336 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002338 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002339 ata_dev_printk(dev, KERN_WARNING,
2340 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002341 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342 goto err_out_nosup;
2343 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002344 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
Tejun Heo7d77b242007-09-23 13:14:13 +09002346 /* Enable ATAPI AN if both the host and device have
2347 * the support. If PMP is attached, SNTF is required
2348 * to enable ATAPI AN to discern between PHY status
2349 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002350 */
Tejun Heoe7ecd432010-05-19 15:38:58 +02002351 if (atapi_an &&
2352 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
Tejun Heo071f44b2008-04-07 22:47:22 +09002353 (!sata_pmp_attached(ap) ||
Tejun Heo7d77b242007-09-23 13:14:13 +09002354 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002355 unsigned int err_mask;
2356
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002357 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002358 err_mask = ata_dev_set_feature(dev,
2359 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002360 if (err_mask)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002361 ata_dev_printk(dev, KERN_ERR,
Tejun Heo854c73a2007-09-23 13:14:11 +09002362 "failed to enable ATAPI AN "
2363 "(err_mask=0x%x)\n", err_mask);
2364 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002365 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002366 atapi_an_string = ", ATAPI AN";
2367 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002368 }
2369
Albert Lee08a556d2006-03-31 13:29:04 +08002370 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002371 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002372 cdb_intr_string = ", CDB intr";
2373 }
Albert Lee312f7da2005-09-27 17:38:03 +08002374
Tejun Heo91163002008-02-21 13:25:50 +09002375 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2376 dev->flags |= ATA_DFLAG_DMADIR;
2377 dma_dir_string = ", DMADIR";
2378 }
2379
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002381 if (ata_msg_drv(ap) && print_info)
Albert Leeef143d52007-06-05 13:01:33 +08002382 ata_dev_printk(dev, KERN_INFO,
Tejun Heo91163002008-02-21 13:25:50 +09002383 "ATAPI: %s, %s, max %s%s%s%s\n",
Albert Leeef143d52007-06-05 13:01:33 +08002384 modelbuf, fwrevbuf,
Tejun Heo12436c32006-05-15 20:59:15 +09002385 ata_mode_string(xfer_mask),
Tejun Heo91163002008-02-21 13:25:50 +09002386 cdb_intr_string, atapi_an_string,
2387 dma_dir_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 }
2389
Tejun Heo914ed352006-11-01 18:39:55 +09002390 /* determine max_sectors */
2391 dev->max_sectors = ATA_MAX_SECTORS;
2392 if (dev->flags & ATA_DFLAG_LBA48)
2393 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2394
Alan Coxc5038fc2007-10-25 14:21:16 +01002395 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2396 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002397 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002398 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09002399 ata_dev_printk(dev, KERN_INFO,
2400 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002401 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002402 dev->max_sectors = ATA_MAX_SECTORS;
2403 }
2404
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002405 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002406 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002407 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002408 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2409 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002410
Tejun Heo75683fe2007-07-05 13:31:27 +09002411 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002412 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2413 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002414
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002415 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002416 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002417
Alan Coxc5038fc2007-10-25 14:21:16 +01002418 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2419 /* Let the user know. We don't want to disallow opens for
2420 rescue purposes, or in case the vendor is just a blithering
2421 idiot. Do this after the dev_config call as some controllers
2422 with buggy firmware may want to avoid reporting false device
2423 bugs */
2424
2425 if (print_info) {
2426 ata_dev_printk(dev, KERN_WARNING,
2427"Drive reports diagnostics failure. This may indicate a drive\n");
2428 ata_dev_printk(dev, KERN_WARNING,
2429"fault or invalid emulation. Contact drive vendor for information.\n");
2430 }
2431 }
2432
Tejun Heoac70a962008-11-27 13:36:48 +09002433 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2434 ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
2435 "firmware update to be fully functional.\n");
2436 ata_dev_printk(dev, KERN_WARNING, " contact the vendor "
2437 "or visit http://ata.wiki.kernel.org.\n");
2438 }
2439
Tejun Heoffeae412006-03-01 16:09:35 +09002440 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441
2442err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002443 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002444 ata_dev_printk(dev, KERN_DEBUG,
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002445 "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002446 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447}
2448
2449/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002450 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002451 * @ap: port
2452 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002453 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002454 * detection.
2455 */
2456
2457int ata_cable_40wire(struct ata_port *ap)
2458{
2459 return ATA_CBL_PATA40;
2460}
2461
2462/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002463 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002464 * @ap: port
2465 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002466 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002467 * detection.
2468 */
2469
2470int ata_cable_80wire(struct ata_port *ap)
2471{
2472 return ATA_CBL_PATA80;
2473}
2474
2475/**
2476 * ata_cable_unknown - return unknown PATA cable.
2477 * @ap: port
2478 *
2479 * Helper method for drivers which have no PATA cable detection.
2480 */
2481
2482int ata_cable_unknown(struct ata_port *ap)
2483{
2484 return ATA_CBL_PATA_UNK;
2485}
2486
2487/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002488 * ata_cable_ignore - return ignored PATA cable.
2489 * @ap: port
2490 *
2491 * Helper method for drivers which don't use cable type to limit
2492 * transfer mode.
2493 */
2494int ata_cable_ignore(struct ata_port *ap)
2495{
2496 return ATA_CBL_PATA_IGN;
2497}
2498
2499/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002500 * ata_cable_sata - return SATA cable type
2501 * @ap: port
2502 *
2503 * Helper method for drivers which have SATA cables
2504 */
2505
2506int ata_cable_sata(struct ata_port *ap)
2507{
2508 return ATA_CBL_SATA;
2509}
2510
2511/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 * ata_bus_probe - Reset and probe ATA bus
2513 * @ap: Bus to probe
2514 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002515 * Master ATA bus probing function. Initiates a hardware-dependent
2516 * bus reset, then attempts to identify any devices found on
2517 * the bus.
2518 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002520 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 *
2522 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002523 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524 */
2525
Brian King80289162006-08-07 14:27:31 -05002526int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002528 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002529 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002530 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002531 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532
Tejun Heo1eca4362008-11-03 20:03:17 +09002533 ata_for_each_dev(dev, &ap->link, ALL)
Tejun Heof58229f2007-08-06 18:36:23 +09002534 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002535
2536 retry:
Tejun Heo1eca4362008-11-03 20:03:17 +09002537 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heocdeab112007-10-29 16:41:09 +09002538 /* If we issue an SRST then an ATA drive (not ATAPI)
2539 * may change configuration and be in PIO0 timing. If
2540 * we do a hard reset (or are coming from power on)
2541 * this is true for ATA or ATAPI. Until we've set a
2542 * suitable controller mode we should not touch the
2543 * bus as we may be talking too fast.
2544 */
2545 dev->pio_mode = XFER_PIO_0;
2546
2547 /* If the controller has a pio mode setup function
2548 * then use it to set the chipset to rights. Don't
2549 * touch the DMA setup as that will be dealt with when
2550 * configuring devices.
2551 */
2552 if (ap->ops->set_piomode)
2553 ap->ops->set_piomode(ap, dev);
2554 }
2555
Tejun Heo20444702006-03-13 01:57:01 +09002556 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002557 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002558
Tejun Heo1eca4362008-11-03 20:03:17 +09002559 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo3e4ec342010-05-10 21:41:30 +02002560 if (dev->class != ATA_DEV_UNKNOWN)
Tejun Heo52783c52006-05-31 18:28:22 +09002561 classes[dev->devno] = dev->class;
2562 else
2563 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002564
Tejun Heo52783c52006-05-31 18:28:22 +09002565 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002566 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002568 /* read IDENTIFY page and configure devices. We have to do the identify
2569 specific sequence bass-ackwards so that PDIAG- is released by
2570 the slave device */
2571
Tejun Heo1eca4362008-11-03 20:03:17 +09002572 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
Tejun Heof58229f2007-08-06 18:36:23 +09002573 if (tries[dev->devno])
2574 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002575
Tejun Heoe1211e32006-04-01 01:38:18 +09002576 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002577 continue;
2578
Tejun Heobff04642006-11-10 18:08:10 +09002579 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2580 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002581 if (rc)
2582 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002583 }
2584
Alan Coxbe0d18d2007-03-06 02:37:56 -08002585 /* Now ask for the cable type as PDIAG- should have been released */
2586 if (ap->ops->cable_detect)
2587 ap->cbl = ap->ops->cable_detect(ap);
2588
Tejun Heo1eca4362008-11-03 20:03:17 +09002589 /* We may have SATA bridge glue hiding here irrespective of
2590 * the reported cable types and sensed types. When SATA
2591 * drives indicate we have a bridge, we don't know which end
2592 * of the link the bridge is which is a problem.
2593 */
2594 ata_for_each_dev(dev, &ap->link, ENABLED)
Alan Cox614fe292007-08-22 23:22:45 +01002595 if (ata_id_is_sata(dev->id))
2596 ap->cbl = ATA_CBL_SATA;
Alan Cox614fe292007-08-22 23:22:45 +01002597
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002598 /* After the identify sequence we can now set up the devices. We do
2599 this in the normal order so that the user doesn't get confused */
2600
Tejun Heo1eca4362008-11-03 20:03:17 +09002601 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002602 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002603 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002604 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002605 if (rc)
2606 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607 }
2608
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002609 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002610 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002611 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002612 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002613
Tejun Heo1eca4362008-11-03 20:03:17 +09002614 ata_for_each_dev(dev, &ap->link, ENABLED)
2615 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002616
Tejun Heo96072e62006-04-01 01:38:17 +09002617 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002618
2619 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002620 tries[dev->devno]--;
2621
Tejun Heo14d2bac2006-04-02 17:54:46 +09002622 switch (rc) {
2623 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002624 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002625 tries[dev->devno] = 0;
2626 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002627
2628 case -ENODEV:
2629 /* give it just one more chance */
2630 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002631 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002632 if (tries[dev->devno] == 1) {
2633 /* This is the last chance, better to slow
2634 * down than lose it.
2635 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002636 sata_down_spd_limit(&ap->link, 0);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002637 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2638 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002639 }
2640
Tejun Heo4ae72a12007-02-02 16:22:30 +09002641 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002642 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002643
Tejun Heo14d2bac2006-04-02 17:54:46 +09002644 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002645}
2646
2647/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002648 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002649 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002650 *
2651 * This function prints link speed and status of a SATA link.
2652 *
2653 * LOCKING:
2654 * None.
2655 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002656static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002657{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002658 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002659
Tejun Heo936fd732007-08-06 18:36:23 +09002660 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002661 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002662 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002663
Tejun Heob1c72912008-07-31 17:02:43 +09002664 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002665 tmp = (sstatus >> 4) & 0xf;
Tejun Heo936fd732007-08-06 18:36:23 +09002666 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002667 "SATA link up %s (SStatus %X SControl %X)\n",
2668 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002669 } else {
Tejun Heo936fd732007-08-06 18:36:23 +09002670 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002671 "SATA link down (SStatus %X SControl %X)\n",
2672 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002673 }
2674}
2675
2676/**
Alan Coxebdfca62006-03-23 15:38:34 +00002677 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002678 * @adev: device
2679 *
2680 * Obtain the other device on the same cable, or if none is
2681 * present NULL is returned
2682 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002683
Tejun Heo3373efd2006-05-15 20:57:53 +09002684struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002685{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002686 struct ata_link *link = adev->link;
2687 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002688 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002689 return NULL;
2690 return pair;
2691}
2692
2693/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002694 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002695 * @link: Link to adjust SATA spd limit for
Tejun Heoa07d4992009-01-29 20:31:33 +09002696 * @spd_limit: Additional limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09002697 *
Tejun Heo936fd732007-08-06 18:36:23 +09002698 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002699 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002700 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002701 *
Tejun Heoa07d4992009-01-29 20:31:33 +09002702 * If @spd_limit is non-zero, the speed is limited to equal to or
2703 * lower than @spd_limit if such speed is supported. If
2704 * @spd_limit is slower than any supported speed, only the lowest
2705 * supported speed is allowed.
2706 *
Tejun Heo1c3fae42006-04-02 20:53:28 +09002707 * LOCKING:
2708 * Inherited from caller.
2709 *
2710 * RETURNS:
2711 * 0 on success, negative errno on failure
2712 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002713int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002714{
Tejun Heo81952c52006-05-15 20:57:47 +09002715 u32 sstatus, spd, mask;
Tejun Heoa07d4992009-01-29 20:31:33 +09002716 int rc, bit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002717
Tejun Heo936fd732007-08-06 18:36:23 +09002718 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002719 return -EOPNOTSUPP;
2720
2721 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002722 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002723 */
Tejun Heo936fd732007-08-06 18:36:23 +09002724 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo9913ff82009-01-29 20:31:31 +09002725 if (rc == 0 && ata_sstatus_online(sstatus))
Tejun Heo008a7892007-07-16 14:29:40 +09002726 spd = (sstatus >> 4) & 0xf;
2727 else
Tejun Heo936fd732007-08-06 18:36:23 +09002728 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002729
Tejun Heo936fd732007-08-06 18:36:23 +09002730 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002731 if (mask <= 1)
2732 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002733
2734 /* unconditionally mask off the highest bit */
Tejun Heoa07d4992009-01-29 20:31:33 +09002735 bit = fls(mask) - 1;
2736 mask &= ~(1 << bit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002737
Tejun Heo008a7892007-07-16 14:29:40 +09002738 /* Mask off all speeds higher than or equal to the current
2739 * one. Force 1.5Gbps if current SPD is not available.
2740 */
2741 if (spd > 1)
2742 mask &= (1 << (spd - 1)) - 1;
2743 else
2744 mask &= 1;
2745
2746 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002747 if (!mask)
2748 return -EINVAL;
2749
Tejun Heoa07d4992009-01-29 20:31:33 +09002750 if (spd_limit) {
2751 if (mask & ((1 << spd_limit) - 1))
2752 mask &= (1 << spd_limit) - 1;
2753 else {
2754 bit = ffs(mask) - 1;
2755 mask = 1 << bit;
2756 }
2757 }
2758
Tejun Heo936fd732007-08-06 18:36:23 +09002759 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002760
Tejun Heo936fd732007-08-06 18:36:23 +09002761 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002762 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002763
2764 return 0;
2765}
2766
Tejun Heo936fd732007-08-06 18:36:23 +09002767static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002768{
Tejun Heo52702222007-10-31 10:17:07 +09002769 struct ata_link *host_link = &link->ap->link;
2770 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002771
Tejun Heo52702222007-10-31 10:17:07 +09002772 limit = link->sata_spd_limit;
2773
2774 /* Don't configure downstream link faster than upstream link.
2775 * It doesn't speed up anything and some PMPs choke on such
2776 * configuration.
2777 */
2778 if (!ata_is_host_link(link) && host_link->sata_spd)
2779 limit &= (1 << host_link->sata_spd) - 1;
2780
2781 if (limit == UINT_MAX)
2782 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002783 else
Tejun Heo52702222007-10-31 10:17:07 +09002784 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002785
2786 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002787 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002788
Tejun Heo52702222007-10-31 10:17:07 +09002789 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002790}
2791
2792/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002793 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002794 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002795 *
2796 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002797 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002798 * whether hardreset is necessary to apply SATA spd
2799 * configuration.
2800 *
2801 * LOCKING:
2802 * Inherited from caller.
2803 *
2804 * RETURNS:
2805 * 1 if SATA spd configuration is needed, 0 otherwise.
2806 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03002807static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002808{
2809 u32 scontrol;
2810
Tejun Heo936fd732007-08-06 18:36:23 +09002811 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002812 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002813
Tejun Heo936fd732007-08-06 18:36:23 +09002814 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002815}
2816
2817/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002818 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002819 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002820 *
Tejun Heo936fd732007-08-06 18:36:23 +09002821 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002822 *
2823 * LOCKING:
2824 * Inherited from caller.
2825 *
2826 * RETURNS:
2827 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002828 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002829 */
Tejun Heo936fd732007-08-06 18:36:23 +09002830int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002831{
2832 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002833 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002834
Tejun Heo936fd732007-08-06 18:36:23 +09002835 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002836 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002837
Tejun Heo936fd732007-08-06 18:36:23 +09002838 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002839 return 0;
2840
Tejun Heo936fd732007-08-06 18:36:23 +09002841 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002842 return rc;
2843
Tejun Heo1c3fae42006-04-02 20:53:28 +09002844 return 1;
2845}
2846
Alan Cox452503f2005-10-21 19:01:32 -04002847/*
2848 * This mode timing computation functionality is ported over from
2849 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2850 */
2851/*
Alan Coxb352e572006-08-10 18:52:12 +01002852 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002853 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002854 * for UDMA6, which is currently supported only by Maxtor drives.
2855 *
2856 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002857 */
2858
2859static const struct ata_timing ata_timing[] = {
David Daney3ada9c12009-01-15 17:45:31 -08002860/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2861 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2862 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2863 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2864 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2865 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2866 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2867 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002868
David Daney3ada9c12009-01-15 17:45:31 -08002869 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2870 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2871 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002872
David Daney3ada9c12009-01-15 17:45:31 -08002873 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2874 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2875 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2876 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2877 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002878
David Daney3ada9c12009-01-15 17:45:31 -08002879/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2880 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2881 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2882 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2883 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2884 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2885 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2886 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002887
2888 { 0xFF }
2889};
2890
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002891#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2892#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002893
2894static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2895{
David Daney3ada9c12009-01-15 17:45:31 -08002896 q->setup = EZ(t->setup * 1000, T);
2897 q->act8b = EZ(t->act8b * 1000, T);
2898 q->rec8b = EZ(t->rec8b * 1000, T);
2899 q->cyc8b = EZ(t->cyc8b * 1000, T);
2900 q->active = EZ(t->active * 1000, T);
2901 q->recover = EZ(t->recover * 1000, T);
2902 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2903 q->cycle = EZ(t->cycle * 1000, T);
2904 q->udma = EZ(t->udma * 1000, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002905}
2906
2907void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2908 struct ata_timing *m, unsigned int what)
2909{
2910 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2911 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2912 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2913 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2914 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2915 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
David Daney3ada9c12009-01-15 17:45:31 -08002916 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
Alan Cox452503f2005-10-21 19:01:32 -04002917 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2918 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2919}
2920
Tejun Heo63573572007-11-27 19:43:39 +09002921const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04002922{
Tejun Heo70cd0712007-11-27 19:43:40 +09002923 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04002924
Tejun Heo70cd0712007-11-27 19:43:40 +09002925 while (xfer_mode > t->mode)
2926 t++;
2927
2928 if (xfer_mode == t->mode)
2929 return t;
2930 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04002931}
2932
2933int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2934 struct ata_timing *t, int T, int UT)
2935{
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002936 const u16 *id = adev->id;
Alan Cox452503f2005-10-21 19:01:32 -04002937 const struct ata_timing *s;
2938 struct ata_timing p;
2939
2940 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002941 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002942 */
Alan Cox452503f2005-10-21 19:01:32 -04002943
2944 if (!(s = ata_timing_find_mode(speed)))
2945 return -EINVAL;
2946
Albert Lee75b1f2f2005-11-16 17:06:18 +08002947 memcpy(t, s, sizeof(*s));
2948
Alan Cox452503f2005-10-21 19:01:32 -04002949 /*
2950 * If the drive is an EIDE drive, it can tell us it needs extended
2951 * PIO/MW_DMA cycle timing.
2952 */
2953
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002954 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
Alan Cox452503f2005-10-21 19:01:32 -04002955 memset(&p, 0, sizeof(p));
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002956
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002957 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002958 if (speed <= XFER_PIO_2)
2959 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2960 else if ((speed <= XFER_PIO_4) ||
2961 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2962 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2963 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2964 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2965
Alan Cox452503f2005-10-21 19:01:32 -04002966 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2967 }
2968
2969 /*
2970 * Convert the timing to bus clock counts.
2971 */
2972
Albert Lee75b1f2f2005-11-16 17:06:18 +08002973 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002974
2975 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002976 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2977 * S.M.A.R.T * and some other commands. We have to ensure that the
2978 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002979 */
2980
Alanfd3367a2006-12-07 12:41:18 +00002981 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04002982 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2983 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2984 }
2985
2986 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002987 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002988 */
2989
2990 if (t->act8b + t->rec8b < t->cyc8b) {
2991 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2992 t->rec8b = t->cyc8b - t->act8b;
2993 }
2994
2995 if (t->active + t->recover < t->cycle) {
2996 t->active += (t->cycle - (t->active + t->recover)) / 2;
2997 t->recover = t->cycle - t->active;
2998 }
Jeff Garzika617c092007-05-21 20:14:23 -04002999
Alan Cox4f701d12007-04-23 11:55:36 +01003000 /* In a few cases quantisation may produce enough errors to
3001 leave t->cycle too low for the sum of active and recovery
3002 if so we must correct this */
3003 if (t->active + t->recover > t->cycle)
3004 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04003005
3006 return 0;
3007}
3008
Tejun Heocf176e12006-04-02 17:54:46 +09003009/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09003010 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3011 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3012 * @cycle: cycle duration in ns
3013 *
3014 * Return matching xfer mode for @cycle. The returned mode is of
3015 * the transfer type specified by @xfer_shift. If @cycle is too
3016 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3017 * than the fastest known mode, the fasted mode is returned.
3018 *
3019 * LOCKING:
3020 * None.
3021 *
3022 * RETURNS:
3023 * Matching xfer_mode, 0xff if no match found.
3024 */
3025u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3026{
3027 u8 base_mode = 0xff, last_mode = 0xff;
3028 const struct ata_xfer_ent *ent;
3029 const struct ata_timing *t;
3030
3031 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3032 if (ent->shift == xfer_shift)
3033 base_mode = ent->base;
3034
3035 for (t = ata_timing_find_mode(base_mode);
3036 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3037 unsigned short this_cycle;
3038
3039 switch (xfer_shift) {
3040 case ATA_SHIFT_PIO:
3041 case ATA_SHIFT_MWDMA:
3042 this_cycle = t->cycle;
3043 break;
3044 case ATA_SHIFT_UDMA:
3045 this_cycle = t->udma;
3046 break;
3047 default:
3048 return 0xff;
3049 }
3050
3051 if (cycle > this_cycle)
3052 break;
3053
3054 last_mode = t->mode;
3055 }
3056
3057 return last_mode;
3058}
3059
3060/**
Tejun Heocf176e12006-04-02 17:54:46 +09003061 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003062 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003063 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003064 *
3065 * Adjust xfer masks of @dev downward. Note that this function
3066 * does not apply the change. Invoking ata_set_mode() afterwards
3067 * will apply the limit.
3068 *
3069 * LOCKING:
3070 * Inherited from caller.
3071 *
3072 * RETURNS:
3073 * 0 on success, negative errno on failure
3074 */
Tejun Heo458337d2007-02-02 16:22:30 +09003075int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003076{
Tejun Heo458337d2007-02-02 16:22:30 +09003077 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003078 unsigned long orig_mask, xfer_mask;
3079 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003080 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003081
Tejun Heo458337d2007-02-02 16:22:30 +09003082 quiet = !!(sel & ATA_DNXFER_QUIET);
3083 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003084
Tejun Heo458337d2007-02-02 16:22:30 +09003085 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3086 dev->mwdma_mask,
3087 dev->udma_mask);
3088 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003089
Tejun Heo458337d2007-02-02 16:22:30 +09003090 switch (sel) {
3091 case ATA_DNXFER_PIO:
3092 highbit = fls(pio_mask) - 1;
3093 pio_mask &= ~(1 << highbit);
3094 break;
3095
3096 case ATA_DNXFER_DMA:
3097 if (udma_mask) {
3098 highbit = fls(udma_mask) - 1;
3099 udma_mask &= ~(1 << highbit);
3100 if (!udma_mask)
3101 return -ENOENT;
3102 } else if (mwdma_mask) {
3103 highbit = fls(mwdma_mask) - 1;
3104 mwdma_mask &= ~(1 << highbit);
3105 if (!mwdma_mask)
3106 return -ENOENT;
3107 }
3108 break;
3109
3110 case ATA_DNXFER_40C:
3111 udma_mask &= ATA_UDMA_MASK_40C;
3112 break;
3113
3114 case ATA_DNXFER_FORCE_PIO0:
3115 pio_mask &= 1;
3116 case ATA_DNXFER_FORCE_PIO:
3117 mwdma_mask = 0;
3118 udma_mask = 0;
3119 break;
3120
Tejun Heo458337d2007-02-02 16:22:30 +09003121 default:
3122 BUG();
3123 }
3124
3125 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3126
3127 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3128 return -ENOENT;
3129
3130 if (!quiet) {
3131 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3132 snprintf(buf, sizeof(buf), "%s:%s",
3133 ata_mode_string(xfer_mask),
3134 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3135 else
3136 snprintf(buf, sizeof(buf), "%s",
3137 ata_mode_string(xfer_mask));
3138
3139 ata_dev_printk(dev, KERN_WARNING,
3140 "limiting speed to %s\n", buf);
3141 }
Tejun Heocf176e12006-04-02 17:54:46 +09003142
3143 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3144 &dev->udma_mask);
3145
Tejun Heocf176e12006-04-02 17:54:46 +09003146 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003147}
3148
Tejun Heo3373efd2006-05-15 20:57:53 +09003149static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003150{
Tejun Heod0cb43b2009-07-09 09:27:50 +09003151 struct ata_port *ap = dev->link->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003152 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003153 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
Tejun Heo4055dee2008-02-07 10:34:08 +09003154 const char *dev_err_whine = "";
3155 int ign_dev_err = 0;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003156 unsigned int err_mask = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003157 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003158
Tejun Heoe8384602006-04-02 18:51:53 +09003159 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 if (dev->xfer_shift == ATA_SHIFT_PIO)
3161 dev->flags |= ATA_DFLAG_PIO;
3162
Tejun Heod0cb43b2009-07-09 09:27:50 +09003163 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3164 dev_err_whine = " (SET_XFERMODE skipped)";
3165 else {
3166 if (nosetxfer)
3167 ata_dev_printk(dev, KERN_WARNING,
3168 "NOSETXFER but PATA detected - can't "
3169 "skip SETXFER, might malfunction\n");
3170 err_mask = ata_dev_set_xfermode(dev);
3171 }
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003172
Tejun Heo4055dee2008-02-07 10:34:08 +09003173 if (err_mask & ~AC_ERR_DEV)
3174 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003175
Tejun Heo4055dee2008-02-07 10:34:08 +09003176 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003177 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003178 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003179 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003180 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003181 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003182
Alan Coxb93fda12008-04-08 16:36:44 +01003183 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3184 /* Old CFA may refuse this command, which is just fine */
3185 if (ata_id_is_cfa(dev->id))
3186 ign_dev_err = 1;
3187 /* Catch several broken garbage emulations plus some pre
3188 ATA devices */
3189 if (ata_id_major_version(dev->id) == 0 &&
3190 dev->pio_mode <= XFER_PIO_2)
3191 ign_dev_err = 1;
3192 /* Some very old devices and some bad newer ones fail
3193 any kind of SET_XFERMODE request but support PIO0-2
3194 timings and no IORDY */
3195 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3196 ign_dev_err = 1;
3197 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003198 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3199 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3200 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3201 dev->dma_mode == XFER_MW_DMA_0 &&
3202 (dev->id[63] >> 8) & 1)
3203 ign_dev_err = 1;
3204
3205 /* if the device is actually configured correctly, ignore dev err */
3206 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3207 ign_dev_err = 1;
3208
3209 if (err_mask & AC_ERR_DEV) {
3210 if (!ign_dev_err)
3211 goto fail;
3212 else
3213 dev_err_whine = " (device error ignored)";
3214 }
3215
Tejun Heo23e71c32006-03-06 04:31:57 +09003216 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3217 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218
Tejun Heo4055dee2008-02-07 10:34:08 +09003219 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3220 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3221 dev_err_whine);
3222
Tejun Heo83206a22006-03-24 15:25:31 +09003223 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003224
3225 fail:
3226 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3227 "(err_mask=0x%x)\n", err_mask);
3228 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229}
3230
Linus Torvalds1da177e2005-04-16 15:20:36 -07003231/**
Alan04351822007-03-06 02:37:52 -08003232 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003233 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003234 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003235 *
Alan04351822007-03-06 02:37:52 -08003236 * Standard implementation of the function used to tune and set
3237 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3238 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003239 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003240 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003242 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003243 *
3244 * RETURNS:
3245 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003246 */
Alan04351822007-03-06 02:37:52 -08003247
Tejun Heo02607312007-08-06 18:36:23 +09003248int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003249{
Tejun Heo02607312007-08-06 18:36:23 +09003250 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003251 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003252 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003253
Tejun Heoa6d5a512006-03-06 04:31:57 +09003254 /* step 1: calculate xfer_mask */
Tejun Heo1eca4362008-11-03 20:03:17 +09003255 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003256 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003257 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003258
Alan Coxb3a70602007-10-02 12:38:26 -04003259 mode_mask = ATA_DMA_MASK_ATA;
3260 if (dev->class == ATA_DEV_ATAPI)
3261 mode_mask = ATA_DMA_MASK_ATAPI;
3262 else if (ata_id_is_cfa(dev->id))
3263 mode_mask = ATA_DMA_MASK_CFA;
3264
Tejun Heo3373efd2006-05-15 20:57:53 +09003265 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003266 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003267
Tejun Heoacf356b2006-03-24 14:07:50 +09003268 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3269 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003270
3271 if (libata_dma_mask & mode_mask)
3272 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3273 else
3274 dma_mask = 0;
3275
Tejun Heoacf356b2006-03-24 14:07:50 +09003276 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3277 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003278
Tejun Heo4f659772006-04-01 01:38:18 +09003279 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003280 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003281 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003282 }
Tejun Heo4f659772006-04-01 01:38:18 +09003283 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003284 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003285
3286 /* step 2: always set host PIO timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003287 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo70cd0712007-11-27 19:43:40 +09003288 if (dev->pio_mode == 0xff) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003289 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003290 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003291 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003292 }
3293
3294 dev->xfer_mode = dev->pio_mode;
3295 dev->xfer_shift = ATA_SHIFT_PIO;
3296 if (ap->ops->set_piomode)
3297 ap->ops->set_piomode(ap, dev);
3298 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003299
Tejun Heoa6d5a512006-03-06 04:31:57 +09003300 /* step 3: set host DMA timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003301 ata_for_each_dev(dev, link, ENABLED) {
3302 if (!ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003303 continue;
3304
3305 dev->xfer_mode = dev->dma_mode;
3306 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3307 if (ap->ops->set_dmamode)
3308 ap->ops->set_dmamode(ap, dev);
3309 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003310
3311 /* step 4: update devices' xfer mode */
Tejun Heo1eca4362008-11-03 20:03:17 +09003312 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo3373efd2006-05-15 20:57:53 +09003313 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003314 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003315 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003316 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003317
Tejun Heoe8e06192006-04-01 01:38:18 +09003318 /* Record simplex status. If we selected DMA then the other
3319 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003320 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003321 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003322 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003323
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003324 out:
3325 if (rc)
3326 *r_failed_dev = dev;
3327 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003328}
3329
3330/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003331 * ata_wait_ready - wait for link to become ready
3332 * @link: link to be waited on
3333 * @deadline: deadline jiffies for the operation
3334 * @check_ready: callback to check link readiness
3335 *
3336 * Wait for @link to become ready. @check_ready should return
3337 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3338 * link doesn't seem to be occupied, other errno for other error
3339 * conditions.
3340 *
3341 * Transient -ENODEV conditions are allowed for
3342 * ATA_TMOUT_FF_WAIT.
3343 *
3344 * LOCKING:
3345 * EH context.
3346 *
3347 * RETURNS:
3348 * 0 if @linke is ready before @deadline; otherwise, -errno.
3349 */
3350int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3351 int (*check_ready)(struct ata_link *link))
3352{
3353 unsigned long start = jiffies;
Tejun Heob48d58f2010-04-09 19:46:38 +09003354 unsigned long nodev_deadline;
Tejun Heoaa2731a2008-04-07 22:47:19 +09003355 int warned = 0;
3356
Tejun Heob48d58f2010-04-09 19:46:38 +09003357 /* choose which 0xff timeout to use, read comment in libata.h */
3358 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3359 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3360 else
3361 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3362
Tejun Heob1c72912008-07-31 17:02:43 +09003363 /* Slave readiness can't be tested separately from master. On
3364 * M/S emulation configuration, this function should be called
3365 * only on the master and it will handle both master and slave.
3366 */
3367 WARN_ON(link == link->ap->slave_link);
3368
Tejun Heoaa2731a2008-04-07 22:47:19 +09003369 if (time_after(nodev_deadline, deadline))
3370 nodev_deadline = deadline;
3371
3372 while (1) {
3373 unsigned long now = jiffies;
3374 int ready, tmp;
3375
3376 ready = tmp = check_ready(link);
3377 if (ready > 0)
3378 return 0;
3379
Tejun Heob48d58f2010-04-09 19:46:38 +09003380 /*
3381 * -ENODEV could be transient. Ignore -ENODEV if link
Tejun Heoaa2731a2008-04-07 22:47:19 +09003382 * is online. Also, some SATA devices take a long
Tejun Heob48d58f2010-04-09 19:46:38 +09003383 * time to clear 0xff after reset. Wait for
3384 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3385 * offline.
Tejun Heoaa2731a2008-04-07 22:47:19 +09003386 *
3387 * Note that some PATA controllers (pata_ali) explode
3388 * if status register is read more than once when
3389 * there's no device attached.
3390 */
3391 if (ready == -ENODEV) {
3392 if (ata_link_online(link))
3393 ready = 0;
3394 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3395 !ata_link_offline(link) &&
3396 time_before(now, nodev_deadline))
3397 ready = 0;
3398 }
3399
3400 if (ready)
3401 return ready;
3402 if (time_after(now, deadline))
3403 return -EBUSY;
3404
3405 if (!warned && time_after(now, start + 5 * HZ) &&
3406 (deadline - now > 3 * HZ)) {
3407 ata_link_printk(link, KERN_WARNING,
3408 "link is slow to respond, please be patient "
3409 "(ready=%d)\n", tmp);
3410 warned = 1;
3411 }
3412
Tejun Heo97750ce2010-09-06 17:56:29 +02003413 ata_msleep(link->ap, 50);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003414 }
3415}
3416
3417/**
3418 * ata_wait_after_reset - wait for link to become ready after reset
3419 * @link: link to be waited on
3420 * @deadline: deadline jiffies for the operation
3421 * @check_ready: callback to check link readiness
3422 *
3423 * Wait for @link to become ready after reset.
3424 *
3425 * LOCKING:
3426 * EH context.
3427 *
3428 * RETURNS:
3429 * 0 if @linke is ready before @deadline; otherwise, -errno.
3430 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003431int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003432 int (*check_ready)(struct ata_link *link))
3433{
Tejun Heo97750ce2010-09-06 17:56:29 +02003434 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003435
3436 return ata_wait_ready(link, deadline, check_ready);
3437}
3438
3439/**
Tejun Heo936fd732007-08-06 18:36:23 +09003440 * sata_link_debounce - debounce SATA phy status
3441 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003442 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003443 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003444 *
Tejun Heo1152b262010-09-01 17:50:05 +02003445 * Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003446 * holding the same value where DET is not 1 for @duration polled
3447 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003448 * beginning of the stable state. Because DET gets stuck at 1 on
3449 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003450 * until timeout then returns 0 if DET is stable at 1.
3451 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003452 * @timeout is further limited by @deadline. The sooner of the
3453 * two is used.
3454 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003455 * LOCKING:
3456 * Kernel thread context (may sleep)
3457 *
3458 * RETURNS:
3459 * 0 on success, -errno on failure.
3460 */
Tejun Heo936fd732007-08-06 18:36:23 +09003461int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3462 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003463{
Tejun Heo341c2c92008-05-20 02:17:51 +09003464 unsigned long interval = params[0];
3465 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003466 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003467 u32 last, cur;
3468 int rc;
3469
Tejun Heo341c2c92008-05-20 02:17:51 +09003470 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003471 if (time_before(t, deadline))
3472 deadline = t;
3473
Tejun Heo936fd732007-08-06 18:36:23 +09003474 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003475 return rc;
3476 cur &= 0xf;
3477
3478 last = cur;
3479 last_jiffies = jiffies;
3480
3481 while (1) {
Tejun Heo97750ce2010-09-06 17:56:29 +02003482 ata_msleep(link->ap, interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003483 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003484 return rc;
3485 cur &= 0xf;
3486
3487 /* DET stable? */
3488 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003489 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003490 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003491 if (time_after(jiffies,
3492 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003493 return 0;
3494 continue;
3495 }
3496
3497 /* unstable, start over */
3498 last = cur;
3499 last_jiffies = jiffies;
3500
Tejun Heof1545152007-07-16 14:29:40 +09003501 /* Check deadline. If debouncing failed, return
3502 * -EPIPE to tell upper layer to lower link speed.
3503 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003504 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003505 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003506 }
3507}
3508
3509/**
Tejun Heo936fd732007-08-06 18:36:23 +09003510 * sata_link_resume - resume SATA link
3511 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003512 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003513 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003514 *
Tejun Heo936fd732007-08-06 18:36:23 +09003515 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003516 *
3517 * LOCKING:
3518 * Kernel thread context (may sleep)
3519 *
3520 * RETURNS:
3521 * 0 on success, -errno on failure.
3522 */
Tejun Heo936fd732007-08-06 18:36:23 +09003523int sata_link_resume(struct ata_link *link, const unsigned long *params,
3524 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003525{
Tejun Heo5040ab62010-01-11 11:14:44 +09003526 int tries = ATA_LINK_RESUME_TRIES;
Tejun Heoac371982008-04-07 22:47:19 +09003527 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003528 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003529
Tejun Heo936fd732007-08-06 18:36:23 +09003530 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003531 return rc;
3532
Tejun Heo5040ab62010-01-11 11:14:44 +09003533 /*
3534 * Writes to SControl sometimes get ignored under certain
3535 * controllers (ata_piix SIDPR). Make sure DET actually is
3536 * cleared.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003537 */
Tejun Heo5040ab62010-01-11 11:14:44 +09003538 do {
3539 scontrol = (scontrol & 0x0f0) | 0x300;
3540 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3541 return rc;
3542 /*
3543 * Some PHYs react badly if SStatus is pounded
3544 * immediately after resuming. Delay 200ms before
3545 * debouncing.
3546 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003547 ata_msleep(link->ap, 200);
Tejun Heo5040ab62010-01-11 11:14:44 +09003548
3549 /* is SControl restored correctly? */
3550 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3551 return rc;
3552 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3553
3554 if ((scontrol & 0xf0f) != 0x300) {
3555 ata_link_printk(link, KERN_ERR,
3556 "failed to resume link (SControl %X)\n",
3557 scontrol);
3558 return 0;
3559 }
3560
3561 if (tries < ATA_LINK_RESUME_TRIES)
3562 ata_link_printk(link, KERN_WARNING,
3563 "link resume succeeded after %d retries\n",
3564 ATA_LINK_RESUME_TRIES - tries);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003565
Tejun Heoac371982008-04-07 22:47:19 +09003566 if ((rc = sata_link_debounce(link, params, deadline)))
3567 return rc;
3568
Tejun Heof0465192008-05-19 01:15:08 +09003569 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003570 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3571 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003572
Tejun Heof0465192008-05-19 01:15:08 +09003573 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003574}
3575
Tejun Heof5914a42006-05-31 18:27:48 +09003576/**
Tejun Heo1152b262010-09-01 17:50:05 +02003577 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3578 * @link: ATA link to manipulate SControl for
3579 * @policy: LPM policy to configure
3580 * @spm_wakeup: initiate LPM transition to active state
3581 *
3582 * Manipulate the IPM field of the SControl register of @link
3583 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3584 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3585 * the link. This function also clears PHYRDY_CHG before
3586 * returning.
3587 *
3588 * LOCKING:
3589 * EH context.
3590 *
3591 * RETURNS:
3592 * 0 on succes, -errno otherwise.
3593 */
3594int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3595 bool spm_wakeup)
3596{
3597 struct ata_eh_context *ehc = &link->eh_context;
3598 bool woken_up = false;
3599 u32 scontrol;
3600 int rc;
3601
3602 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3603 if (rc)
3604 return rc;
3605
3606 switch (policy) {
3607 case ATA_LPM_MAX_POWER:
3608 /* disable all LPM transitions */
3609 scontrol |= (0x3 << 8);
3610 /* initiate transition to active state */
3611 if (spm_wakeup) {
3612 scontrol |= (0x4 << 12);
3613 woken_up = true;
3614 }
3615 break;
3616 case ATA_LPM_MED_POWER:
3617 /* allow LPM to PARTIAL */
3618 scontrol &= ~(0x1 << 8);
3619 scontrol |= (0x2 << 8);
3620 break;
3621 case ATA_LPM_MIN_POWER:
3622 /* no restrictions on LPM transitions */
3623 scontrol &= ~(0x3 << 8);
3624 break;
3625 default:
3626 WARN_ON(1);
3627 }
3628
3629 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3630 if (rc)
3631 return rc;
3632
3633 /* give the link time to transit out of LPM state */
3634 if (woken_up)
3635 msleep(10);
3636
3637 /* clear PHYRDY_CHG from SError */
3638 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3639 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3640}
3641
3642/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003643 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003644 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003645 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003646 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003647 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003648 * prereset makes libata abort whole reset sequence and give up
3649 * that port, so prereset should be best-effort. It does its
3650 * best to prepare for reset sequence but if things go wrong, it
3651 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003652 *
3653 * LOCKING:
3654 * Kernel thread context (may sleep)
3655 *
3656 * RETURNS:
3657 * 0 on success, -errno otherwise.
3658 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003659int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003660{
Tejun Heocc0680a2007-08-06 18:36:23 +09003661 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003662 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003663 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003664 int rc;
3665
Tejun Heof5914a42006-05-31 18:27:48 +09003666 /* if we're about to do hardreset, nothing more to do */
3667 if (ehc->i.action & ATA_EH_HARDRESET)
3668 return 0;
3669
Tejun Heo936fd732007-08-06 18:36:23 +09003670 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003671 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003672 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003673 /* whine about phy resume failure but proceed */
3674 if (rc && rc != -EOPNOTSUPP)
Tejun Heocc0680a2007-08-06 18:36:23 +09003675 ata_link_printk(link, KERN_WARNING, "failed to resume "
Tejun Heof5914a42006-05-31 18:27:48 +09003676 "link for reset (errno=%d)\n", rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003677 }
3678
Tejun Heo45db2f62008-04-08 01:46:56 +09003679 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003680 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003681 ehc->i.action &= ~ATA_EH_SOFTRESET;
3682
Tejun Heof5914a42006-05-31 18:27:48 +09003683 return 0;
3684}
3685
Tejun Heoc2bd5802006-01-24 17:05:22 +09003686/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003687 * sata_link_hardreset - reset link via SATA phy reset
3688 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003689 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003690 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003691 * @online: optional out parameter indicating link onlineness
3692 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003693 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003694 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003695 * After hardreset, link readiness is waited upon using
3696 * ata_wait_ready() if @check_ready is specified. LLDs are
3697 * allowed to not specify @check_ready and wait itself after this
3698 * function returns. Device classification is LLD's
3699 * responsibility.
3700 *
3701 * *@online is set to one iff reset succeeded and @link is online
3702 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003703 *
3704 * LOCKING:
3705 * Kernel thread context (may sleep)
3706 *
3707 * RETURNS:
3708 * 0 on success, -errno otherwise.
3709 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003710int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003711 unsigned long deadline,
3712 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003713{
Tejun Heo852ee162006-04-01 01:38:18 +09003714 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003715 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003716
Tejun Heoc2bd5802006-01-24 17:05:22 +09003717 DPRINTK("ENTER\n");
3718
Tejun Heo9dadd452008-04-07 22:47:19 +09003719 if (online)
3720 *online = false;
3721
Tejun Heo936fd732007-08-06 18:36:23 +09003722 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003723 /* SATA spec says nothing about how to reconfigure
3724 * spd. To be on the safe side, turn off phy during
3725 * reconfiguration. This works for at least ICH7 AHCI
3726 * and Sil3124.
3727 */
Tejun Heo936fd732007-08-06 18:36:23 +09003728 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003729 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003730
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003731 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003732
Tejun Heo936fd732007-08-06 18:36:23 +09003733 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003734 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003735
Tejun Heo936fd732007-08-06 18:36:23 +09003736 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003737 }
3738
3739 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003740 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003741 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003742
Tejun Heo852ee162006-04-01 01:38:18 +09003743 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003744
Tejun Heo936fd732007-08-06 18:36:23 +09003745 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003746 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003747
Tejun Heo1c3fae42006-04-02 20:53:28 +09003748 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003749 * 10.4.2 says at least 1 ms.
3750 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003751 ata_msleep(link->ap, 1);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003752
Tejun Heo936fd732007-08-06 18:36:23 +09003753 /* bring link back */
3754 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003755 if (rc)
3756 goto out;
3757 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003758 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003759 goto out;
3760
3761 /* Link is online. From this point, -ENODEV too is an error. */
3762 if (online)
3763 *online = true;
3764
Tejun Heo071f44b2008-04-07 22:47:22 +09003765 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003766 /* If PMP is supported, we have to do follow-up SRST.
3767 * Some PMPs don't send D2H Reg FIS after hardreset if
3768 * the first port is empty. Wait only for
3769 * ATA_TMOUT_PMP_SRST_WAIT.
3770 */
3771 if (check_ready) {
3772 unsigned long pmp_deadline;
3773
Tejun Heo341c2c92008-05-20 02:17:51 +09003774 pmp_deadline = ata_deadline(jiffies,
3775 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003776 if (time_after(pmp_deadline, deadline))
3777 pmp_deadline = deadline;
3778 ata_wait_ready(link, pmp_deadline, check_ready);
3779 }
3780 rc = -EAGAIN;
3781 goto out;
3782 }
3783
3784 rc = 0;
3785 if (check_ready)
3786 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003787 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003788 if (rc && rc != -EAGAIN) {
3789 /* online is set iff link is online && reset succeeded */
3790 if (online)
3791 *online = false;
Tejun Heo9dadd452008-04-07 22:47:19 +09003792 ata_link_printk(link, KERN_ERR,
3793 "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003794 }
Tejun Heob6103f62006-11-01 17:59:53 +09003795 DPRINTK("EXIT, rc=%d\n", rc);
3796 return rc;
3797}
3798
3799/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003800 * sata_std_hardreset - COMRESET w/o waiting or classification
3801 * @link: link to reset
3802 * @class: resulting class of attached device
3803 * @deadline: deadline jiffies for the operation
3804 *
3805 * Standard SATA COMRESET w/o waiting or classification.
3806 *
3807 * LOCKING:
3808 * Kernel thread context (may sleep)
3809 *
3810 * RETURNS:
3811 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3812 */
3813int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3814 unsigned long deadline)
3815{
3816 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3817 bool online;
3818 int rc;
3819
3820 /* do hardreset */
3821 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003822 return online ? -EAGAIN : rc;
3823}
3824
3825/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003826 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003827 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003828 * @classes: classes of attached devices
3829 *
3830 * This function is invoked after a successful reset. Note that
3831 * the device might have been reset more than once using
3832 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003833 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003834 * LOCKING:
3835 * Kernel thread context (may sleep)
3836 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003837void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003838{
Tejun Heof0465192008-05-19 01:15:08 +09003839 u32 serror;
3840
Tejun Heoc2bd5802006-01-24 17:05:22 +09003841 DPRINTK("ENTER\n");
3842
Tejun Heof0465192008-05-19 01:15:08 +09003843 /* reset complete, clear SError */
3844 if (!sata_scr_read(link, SCR_ERROR, &serror))
3845 sata_scr_write(link, SCR_ERROR, serror);
3846
Tejun Heoc2bd5802006-01-24 17:05:22 +09003847 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003848 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003849
Tejun Heoc2bd5802006-01-24 17:05:22 +09003850 DPRINTK("EXIT\n");
3851}
3852
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003853/**
Tejun Heo623a3122006-03-05 17:55:58 +09003854 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003855 * @dev: device to compare against
3856 * @new_class: class of the new device
3857 * @new_id: IDENTIFY page of the new device
3858 *
3859 * Compare @new_class and @new_id against @dev and determine
3860 * whether @dev is the device indicated by @new_class and
3861 * @new_id.
3862 *
3863 * LOCKING:
3864 * None.
3865 *
3866 * RETURNS:
3867 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3868 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003869static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3870 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003871{
3872 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003873 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3874 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003875
3876 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003877 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3878 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003879 return 0;
3880 }
3881
Tejun Heoa0cf7332007-01-02 20:18:49 +09003882 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3883 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3884 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3885 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003886
3887 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003888 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3889 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003890 return 0;
3891 }
3892
3893 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003894 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3895 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003896 return 0;
3897 }
3898
Tejun Heo623a3122006-03-05 17:55:58 +09003899 return 1;
3900}
3901
3902/**
Tejun Heofe309112007-05-15 03:28:15 +09003903 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003904 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003905 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003906 *
3907 * Re-read IDENTIFY page and make sure @dev is still attached to
3908 * the port.
3909 *
3910 * LOCKING:
3911 * Kernel thread context (may sleep)
3912 *
3913 * RETURNS:
3914 * 0 on success, negative errno otherwise
3915 */
Tejun Heofe309112007-05-15 03:28:15 +09003916int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003917{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003918 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003919 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003920 int rc;
3921
Tejun Heofe635c72006-05-15 20:57:35 +09003922 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003923 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003924 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003925 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003926
3927 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003928 if (!ata_dev_same_device(dev, class, id))
3929 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003930
Tejun Heofe635c72006-05-15 20:57:35 +09003931 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003932 return 0;
3933}
3934
3935/**
3936 * ata_dev_revalidate - Revalidate ATA device
3937 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09003938 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09003939 * @readid_flags: read ID flags
3940 *
3941 * Re-read IDENTIFY page, make sure @dev is still attached to the
3942 * port and reconfigure it according to the new IDENTIFY page.
3943 *
3944 * LOCKING:
3945 * Kernel thread context (may sleep)
3946 *
3947 * RETURNS:
3948 * 0 on success, negative errno otherwise
3949 */
Tejun Heo422c9da2007-09-23 13:14:12 +09003950int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3951 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09003952{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003953 u64 n_sectors = dev->n_sectors;
Tejun Heo5920dad2009-07-15 17:11:41 +09003954 u64 n_native_sectors = dev->n_native_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003955 int rc;
3956
3957 if (!ata_dev_enabled(dev))
3958 return -ENODEV;
3959
Tejun Heo422c9da2007-09-23 13:14:12 +09003960 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3961 if (ata_class_enabled(new_class) &&
Borislav Petkovf0d06132009-04-26 16:33:34 +02003962 new_class != ATA_DEV_ATA &&
3963 new_class != ATA_DEV_ATAPI &&
3964 new_class != ATA_DEV_SEMB) {
Tejun Heo422c9da2007-09-23 13:14:12 +09003965 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
3966 dev->class, new_class);
3967 rc = -ENODEV;
3968 goto fail;
3969 }
3970
Tejun Heofe309112007-05-15 03:28:15 +09003971 /* re-read ID */
3972 rc = ata_dev_reread_id(dev, readid_flags);
3973 if (rc)
3974 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09003975
3976 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003977 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003978 if (rc)
3979 goto fail;
3980
3981 /* verify n_sectors hasn't changed */
Tejun Heo445d2112010-04-05 10:33:13 +09003982 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3983 dev->n_sectors == n_sectors)
3984 return 0;
3985
3986 /* n_sectors has changed */
3987 ata_dev_printk(dev, KERN_WARNING, "n_sectors mismatch %llu != %llu\n",
3988 (unsigned long long)n_sectors,
3989 (unsigned long long)dev->n_sectors);
3990
3991 /*
3992 * Something could have caused HPA to be unlocked
3993 * involuntarily. If n_native_sectors hasn't changed and the
3994 * new size matches it, keep the device.
3995 */
3996 if (dev->n_native_sectors == n_native_sectors &&
3997 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3998 ata_dev_printk(dev, KERN_WARNING,
3999 "new n_sectors matches native, probably "
Tejun Heo68939ce2010-05-15 20:09:33 +02004000 "late HPA unlock, n_sectors updated\n");
4001 /* use the larger n_sectors */
Tejun Heo445d2112010-04-05 10:33:13 +09004002 return 0;
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004003 }
4004
Tejun Heo445d2112010-04-05 10:33:13 +09004005 /*
4006 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4007 * unlocking HPA in those cases.
4008 *
4009 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4010 */
4011 if (dev->n_native_sectors == n_native_sectors &&
4012 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4013 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4014 ata_dev_printk(dev, KERN_WARNING,
4015 "old n_sectors matches native, probably "
4016 "late HPA lock, will try to unlock HPA\n");
4017 /* try unlocking HPA */
4018 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4019 rc = -EIO;
4020 } else
4021 rc = -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09004022
Tejun Heo445d2112010-04-05 10:33:13 +09004023 /* restore original n_[native_]sectors and fail */
4024 dev->n_native_sectors = n_native_sectors;
4025 dev->n_sectors = n_sectors;
Tejun Heo623a3122006-03-05 17:55:58 +09004026 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09004027 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09004028 return rc;
4029}
4030
Alan Cox6919a0a2006-10-27 19:08:46 -07004031struct ata_blacklist_entry {
4032 const char *model_num;
4033 const char *model_rev;
4034 unsigned long horkage;
4035};
4036
4037static const struct ata_blacklist_entry ata_device_blacklist [] = {
4038 /* Devices with DMA related problems under Linux */
4039 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4040 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4041 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4042 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4043 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4044 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4045 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4046 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4047 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004048 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004049 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4050 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4051 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4052 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4053 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004054 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004055 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4056 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4057 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4058 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4059 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4060 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4061 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4062 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004063 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4064 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004065 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004066 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004067 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004068 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004069
Albert Lee18d6e9d2007-04-02 11:34:15 +08004070 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004071 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004072 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004073
Alan Cox6919a0a2006-10-27 19:08:46 -07004074 /* Devices we expect to fail diagnostics */
4075
4076 /* Devices where NCQ should be avoided */
4077 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004078 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004079 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004080 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4081 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004082 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004083 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004084 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004085 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004086 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Lubomir Bulej5ccfca92008-12-22 11:35:22 +01004087 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004088
Tejun Heoac70a962008-11-27 13:36:48 +09004089 /* Seagate NCQ + FLUSH CACHE firmware bug */
Mark Lord4d1f9082010-07-05 18:53:37 -04004090 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004091 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004092
Mark Lord4d1f9082010-07-05 18:53:37 -04004093 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004094 ATA_HORKAGE_FIRMWARE_WARN },
4095
Mark Lord4d1f9082010-07-05 18:53:37 -04004096 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004097 ATA_HORKAGE_FIRMWARE_WARN },
4098
Mark Lord4d1f9082010-07-05 18:53:37 -04004099 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004100 ATA_HORKAGE_FIRMWARE_WARN },
4101
Robert Hancock36e337d2007-04-02 22:05:29 -06004102 /* Blacklist entries taken from Silicon Image 3124/3132
4103 Windows driver .inf file - also several Linux problem reports */
4104 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4105 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4106 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004107
Tejun Heo68b0ddb2010-04-05 10:51:26 +09004108 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4109 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4110
Tejun Heo16c55b02007-08-29 11:58:33 +09004111 /* devices which puke on READ_NATIVE_MAX */
4112 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4113 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4114 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4115 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004116
Tejun Heo78313872009-08-07 01:59:15 +09004117 /* this one allows HPA unlocking but fails IOs on the area */
4118 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4119
Alan Cox93328e12007-09-29 04:06:48 -04004120 /* Devices which report 1 sector over size HPA */
4121 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4122 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004123 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004124
Alan Cox6bbfd532007-11-05 22:58:58 +00004125 /* Devices which get the IVB wrong */
4126 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004127 /* Maybe we should just blacklist TSSTcorp... */
Mark Lord7da4c932010-07-01 18:18:12 -04004128 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004129
Jens Axboe9ce8e302008-08-27 15:23:18 +02004130 /* Devices that do not need bridging limits applied */
4131 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4132
Tejun Heo90627122009-01-29 20:31:36 +09004133 /* Devices which aren't very happy with higher link speeds */
4134 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4135
Tejun Heod0cb43b2009-07-09 09:27:50 +09004136 /*
4137 * Devices which choke on SETXFER. Applies only if both the
4138 * device and controller are SATA.
4139 */
4140 { "PIONEER DVD-RW DVRTD08", "1.00", ATA_HORKAGE_NOSETXFER },
4141
Alan Cox6919a0a2006-10-27 19:08:46 -07004142 /* End Marker */
4143 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004144};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004145
Mark Lordbce036c2010-07-01 18:16:14 -04004146/**
4147 * glob_match - match a text string against a glob-style pattern
4148 * @text: the string to be examined
4149 * @pattern: the glob-style pattern to be matched against
4150 *
4151 * Either/both of text and pattern can be empty strings.
4152 *
4153 * Match text against a glob-style pattern, with wildcards and simple sets:
4154 *
4155 * ? matches any single character.
4156 * * matches any run of characters.
4157 * [xyz] matches a single character from the set: x, y, or z.
Mark Lord2f9e4d12010-07-05 10:25:45 -04004158 * [a-d] matches a single character from the range: a, b, c, or d.
4159 * [a-d0-9] matches a single character from either range.
Mark Lordbce036c2010-07-01 18:16:14 -04004160 *
Mark Lord2f9e4d12010-07-05 10:25:45 -04004161 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4162 * Behaviour with malformed patterns is undefined, though generally reasonable.
Mark Lordbce036c2010-07-01 18:16:14 -04004163 *
Randy Dunlap3d2be542010-08-09 16:28:30 -07004164 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
Mark Lordbce036c2010-07-01 18:16:14 -04004165 *
4166 * This function uses one level of recursion per '*' in pattern.
4167 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4168 * this will not cause stack problems for any reasonable use here.
4169 *
4170 * RETURNS:
4171 * 0 on match, 1 otherwise.
4172 */
4173static int glob_match (const char *text, const char *pattern)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004174{
Mark Lordbce036c2010-07-01 18:16:14 -04004175 do {
4176 /* Match single character or a '?' wildcard */
4177 if (*text == *pattern || *pattern == '?') {
4178 if (!*pattern++)
4179 return 0; /* End of both strings: match */
4180 } else {
4181 /* Match single char against a '[' bracketed ']' pattern set */
4182 if (!*text || *pattern != '[')
4183 break; /* Not a pattern set */
Mark Lord2f9e4d12010-07-05 10:25:45 -04004184 while (*++pattern && *pattern != ']' && *text != *pattern) {
4185 if (*pattern == '-' && *(pattern - 1) != '[')
4186 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4187 ++pattern;
4188 break;
4189 }
4190 }
Mark Lordbce036c2010-07-01 18:16:14 -04004191 if (!*pattern || *pattern == ']')
4192 return 1; /* No match */
4193 while (*pattern && *pattern++ != ']');
4194 }
4195 } while (*++text && *pattern);
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004196
Mark Lordbce036c2010-07-01 18:16:14 -04004197 /* Match any run of chars against a '*' wildcard */
4198 if (*pattern == '*') {
4199 if (!*++pattern)
4200 return 0; /* Match: avoid recursion at end of pattern */
4201 /* Loop to handle additional pattern chars after the wildcard */
4202 while (*text) {
4203 if (glob_match(text, pattern) == 0)
4204 return 0; /* Remainder matched */
4205 ++text; /* Absorb (match) this char and try again */
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004206 }
4207 }
Mark Lordbce036c2010-07-01 18:16:14 -04004208 if (!*text && !*pattern)
4209 return 0; /* End of both strings: match */
4210 return 1; /* No match */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004211}
Mark Lordbce036c2010-07-01 18:16:14 -04004212
Tejun Heo75683fe2007-07-05 13:31:27 +09004213static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004214{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004215 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4216 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004217 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004218
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004219 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4220 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004221
Alan Cox6919a0a2006-10-27 19:08:46 -07004222 while (ad->model_num) {
Mark Lordbce036c2010-07-01 18:16:14 -04004223 if (!glob_match(model_num, ad->model_num)) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004224 if (ad->model_rev == NULL)
4225 return ad->horkage;
Mark Lordbce036c2010-07-01 18:16:14 -04004226 if (!glob_match(model_rev, ad->model_rev))
Alan Cox6919a0a2006-10-27 19:08:46 -07004227 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004228 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004229 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004231 return 0;
4232}
4233
Alan Cox6919a0a2006-10-27 19:08:46 -07004234static int ata_dma_blacklisted(const struct ata_device *dev)
4235{
4236 /* We don't support polling DMA.
4237 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4238 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4239 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004240 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004241 (dev->flags & ATA_DFLAG_CDB_INTR))
4242 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004243 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004244}
4245
Tejun Heoa6d5a512006-03-06 04:31:57 +09004246/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004247 * ata_is_40wire - check drive side detection
4248 * @dev: device
4249 *
4250 * Perform drive side detection decoding, allowing for device vendors
4251 * who can't follow the documentation.
4252 */
4253
4254static int ata_is_40wire(struct ata_device *dev)
4255{
4256 if (dev->horkage & ATA_HORKAGE_IVB)
4257 return ata_drive_40wire_relaxed(dev->id);
4258 return ata_drive_40wire(dev->id);
4259}
4260
4261/**
Alan Cox15a55512008-03-28 14:33:46 -07004262 * cable_is_40wire - 40/80/SATA decider
4263 * @ap: port to consider
4264 *
4265 * This function encapsulates the policy for speed management
4266 * in one place. At the moment we don't cache the result but
4267 * there is a good case for setting ap->cbl to the result when
4268 * we are called with unknown cables (and figuring out if it
4269 * impacts hotplug at all).
4270 *
4271 * Return 1 if the cable appears to be 40 wire.
4272 */
4273
4274static int cable_is_40wire(struct ata_port *ap)
4275{
4276 struct ata_link *link;
4277 struct ata_device *dev;
4278
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004279 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004280 if (ap->cbl == ATA_CBL_PATA40)
4281 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004282
4283 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004284 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4285 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004286
4287 /* If the system is known to be 40 wire short cable (eg
4288 * laptop), then we allow 80 wire modes even if the drive
4289 * isn't sure.
4290 */
Alan Coxf7920682008-04-08 16:37:50 +01004291 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4292 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004293
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004294 /* If the controller doesn't know, we scan.
4295 *
4296 * Note: We look for all 40 wire detects at this point. Any
4297 * 80 wire detect is taken to be 80 wire cable because
4298 * - in many setups only the one drive (slave if present) will
4299 * give a valid detect
4300 * - if you have a non detect capable drive you don't want it
4301 * to colour the choice
4302 */
Tejun Heo1eca4362008-11-03 20:03:17 +09004303 ata_for_each_link(link, ap, EDGE) {
4304 ata_for_each_dev(dev, link, ENABLED) {
4305 if (!ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004306 return 0;
4307 }
4308 }
4309 return 1;
4310}
4311
4312/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004313 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004314 * @dev: Device to compute xfermask for
4315 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004316 * Compute supported xfermask of @dev and store it in
4317 * dev->*_mask. This function is responsible for applying all
4318 * known limits including host controller limits, device
4319 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004320 *
4321 * LOCKING:
4322 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004323 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004324static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004326 struct ata_link *link = dev->link;
4327 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004328 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004329 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004330
Tejun Heo37deecb2006-08-10 16:59:07 +09004331 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004332 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4333 ap->mwdma_mask, ap->udma_mask);
4334
Robert Hancock8343f882007-03-06 02:37:51 -08004335 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004336 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4337 dev->mwdma_mask, dev->udma_mask);
4338 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004339
Alan Coxb352e572006-08-10 18:52:12 +01004340 /*
4341 * CFA Advanced TrueIDE timings are not allowed on a shared
4342 * cable
4343 */
4344 if (ata_dev_pair(dev)) {
4345 /* No PIO5 or PIO6 */
4346 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4347 /* No MWDMA3 or MWDMA 4 */
4348 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4349 }
4350
Tejun Heo37deecb2006-08-10 16:59:07 +09004351 if (ata_dma_blacklisted(dev)) {
4352 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09004353 ata_dev_printk(dev, KERN_WARNING,
4354 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004355 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004356
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004357 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004358 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004359 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4360 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4361 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004362 }
Tejun Heo565083e2006-04-02 17:54:47 +09004363
Jeff Garzike4246752007-03-09 09:56:46 -05004364 if (ap->flags & ATA_FLAG_NO_IORDY)
4365 xfer_mask &= ata_pio_mask_no_iordy(dev);
4366
Alan Cox5444a6f2006-03-27 18:58:20 +01004367 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004368 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004369
Robert Hancock8343f882007-03-06 02:37:51 -08004370 /* Apply cable rule here. Don't apply it early because when
4371 * we handle hot plug the cable type can itself change.
4372 * Check this last so that we know if the transfer rate was
4373 * solely limited by the cable.
4374 * Unknown or 80 wire cables reported host side are checked
4375 * drive side as well. Cases where we know a 40wire cable
4376 * is used safely for 80 are not checked here.
4377 */
4378 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4379 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004380 if (cable_is_40wire(ap)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004381 ata_dev_printk(dev, KERN_WARNING,
Robert Hancock8343f882007-03-06 02:37:51 -08004382 "limited to UDMA/33 due to 40-wire cable\n");
4383 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4384 }
4385
Tejun Heo565083e2006-04-02 17:54:47 +09004386 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4387 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004388}
4389
Linus Torvalds1da177e2005-04-16 15:20:36 -07004390/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004391 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392 * @dev: Device to which command will be sent
4393 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004394 * Issue SET FEATURES - XFER MODE command to device @dev
4395 * on port @ap.
4396 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004397 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004398 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004399 *
4400 * RETURNS:
4401 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004402 */
4403
Tejun Heo3373efd2006-05-15 20:57:53 +09004404static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004405{
Tejun Heoa0123702005-12-13 14:49:31 +09004406 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004407 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408
4409 /* set up set-features taskfile */
4410 DPRINTK("set features - xfer mode\n");
4411
Tejun Heo464cf172007-05-27 15:10:40 +02004412 /* Some controllers and ATAPI devices show flaky interrupt
4413 * behavior after setting xfer mode. Use polling instead.
4414 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004415 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004416 tf.command = ATA_CMD_SET_FEATURES;
4417 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004418 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004419 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004420 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004421 if (ata_pio_need_iordy(dev))
4422 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004423 /* If the device has IORDY and the controller does not - turn it off */
4424 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004425 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004426 else /* In the ancient relic department - skip all of this */
4427 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004428
Tejun Heo2b789102007-10-09 15:05:44 +09004429 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004430
Tejun Heo83206a22006-03-24 15:25:31 +09004431 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4432 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004433}
Tejun Heo1152b262010-09-01 17:50:05 +02004434
Linus Torvalds1da177e2005-04-16 15:20:36 -07004435/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004436 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004437 * @dev: Device to which command will be sent
4438 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004439 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004440 *
4441 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004442 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004443 *
4444 * LOCKING:
4445 * PCI/etc. bus probe sem.
4446 *
4447 * RETURNS:
4448 * 0 on success, AC_ERR_* mask otherwise.
4449 */
Tejun Heo1152b262010-09-01 17:50:05 +02004450unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004451{
4452 struct ata_taskfile tf;
4453 unsigned int err_mask;
4454
4455 /* set up set-features taskfile */
4456 DPRINTK("set features - SATA features\n");
4457
4458 ata_tf_init(dev, &tf);
4459 tf.command = ATA_CMD_SET_FEATURES;
4460 tf.feature = enable;
4461 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4462 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004463 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004464
Tejun Heo2b789102007-10-09 15:05:44 +09004465 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004466
4467 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4468 return err_mask;
4469}
4470
4471/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04004472 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04004473 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004474 * @heads: Number of heads (taskfile parameter)
4475 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004476 *
4477 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004478 * Kernel thread context (may sleep)
4479 *
4480 * RETURNS:
4481 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04004482 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004483static unsigned int ata_dev_init_params(struct ata_device *dev,
4484 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004485{
Tejun Heoa0123702005-12-13 14:49:31 +09004486 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004487 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004488
4489 /* Number of sectors per track 1-255. Number of heads 1-16 */
4490 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004491 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004492
4493 /* set up init dev params taskfile */
4494 DPRINTK("init dev params \n");
4495
Tejun Heo3373efd2006-05-15 20:57:53 +09004496 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004497 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4498 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4499 tf.protocol = ATA_PROT_NODATA;
4500 tf.nsect = sectors;
4501 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04004502
Tejun Heo2b789102007-10-09 15:05:44 +09004503 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004504 /* A clean abort indicates an original or just out of spec drive
4505 and we should continue as we issue the setup based on the
4506 drive reported working geometry */
4507 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4508 err_mask = 0;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004509
Tejun Heo6aff8f12006-02-15 18:24:09 +09004510 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4511 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004512}
4513
4514/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004515 * ata_sg_clean - Unmap DMA memory associated with command
4516 * @qc: Command containing DMA memory to be released
4517 *
4518 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004519 *
4520 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004521 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004522 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004523void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004524{
4525 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004526 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004527 int dir = qc->dma_dir;
4528
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004529 WARN_ON_ONCE(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004530
James Bottomleydde20202008-02-19 11:36:56 +01004531 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532
James Bottomleydde20202008-02-19 11:36:56 +01004533 if (qc->n_elem)
FUJITA Tomonori58256272009-02-27 17:35:43 +09004534 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535
4536 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004537 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004538}
4539
4540/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004541 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004542 * @qc: Metadata associated with taskfile to check
4543 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004544 * Allow low-level driver to filter ATA PACKET commands, returning
4545 * a status indicating whether or not it is OK to use DMA for the
4546 * supplied PACKET command.
4547 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004548 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004549 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004550 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004551 * RETURNS: 0 when ATAPI DMA can be used
4552 * nonzero otherwise
4553 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004554int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555{
4556 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004557
Tejun Heob9a41972007-06-27 02:48:43 +09004558 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4559 * few ATAPI devices choke on such DMA requests.
4560 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004561 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4562 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004563 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004564
Linus Torvalds1da177e2005-04-16 15:20:36 -07004565 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004566 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567
Tejun Heob9a41972007-06-27 02:48:43 +09004568 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004569}
Tejun Heob9a41972007-06-27 02:48:43 +09004570
Linus Torvalds1da177e2005-04-16 15:20:36 -07004571/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004572 * ata_std_qc_defer - Check whether a qc needs to be deferred
4573 * @qc: ATA command in question
4574 *
4575 * Non-NCQ commands cannot run with any other command, NCQ or
4576 * not. As upper layer only knows the queue depth, we are
4577 * responsible for maintaining exclusion. This function checks
4578 * whether a new command @qc can be issued.
4579 *
4580 * LOCKING:
4581 * spin_lock_irqsave(host lock)
4582 *
4583 * RETURNS:
4584 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4585 */
4586int ata_std_qc_defer(struct ata_queued_cmd *qc)
4587{
4588 struct ata_link *link = qc->dev->link;
4589
4590 if (qc->tf.protocol == ATA_PROT_NCQ) {
4591 if (!ata_tag_valid(link->active_tag))
4592 return 0;
4593 } else {
4594 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4595 return 0;
4596 }
4597
4598 return ATA_DEFER_LINK;
4599}
4600
Brian Kinge46834c2006-03-17 17:04:03 -06004601void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4602
Jeff Garzik0cba6322005-05-30 19:49:12 -04004603/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004604 * ata_sg_init - Associate command with scatter-gather table.
4605 * @qc: Command to be associated
4606 * @sg: Scatter-gather table.
4607 * @n_elem: Number of elements in s/g table.
4608 *
4609 * Initialize the data-related elements of queued_cmd @qc
4610 * to point to a scatter-gather table @sg, containing @n_elem
4611 * elements.
4612 *
4613 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004614 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004615 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004616void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4617 unsigned int n_elem)
4618{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004619 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004620 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004621 qc->cursg = qc->sg;
4622}
4623
Linus Torvalds1da177e2005-04-16 15:20:36 -07004624/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004625 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4626 * @qc: Command with scatter-gather table to be mapped.
4627 *
4628 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004629 *
4630 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004631 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004632 *
4633 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004634 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004635 *
4636 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004637static int ata_sg_setup(struct ata_queued_cmd *qc)
4638{
4639 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004640 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004641
Tejun Heo44877b42007-02-21 01:06:51 +09004642 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004643
James Bottomleydde20202008-02-19 11:36:56 +01004644 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4645 if (n_elem < 1)
4646 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004647
James Bottomleydde20202008-02-19 11:36:56 +01004648 DPRINTK("%d sg elements mapped\n", n_elem);
FUJITA Tomonori58256272009-02-27 17:35:43 +09004649 qc->orig_n_elem = qc->n_elem;
James Bottomleydde20202008-02-19 11:36:56 +01004650 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004651 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004652
4653 return 0;
4654}
4655
4656/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004657 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004658 * @buf: Buffer to swap
4659 * @buf_words: Number of 16-bit words in buffer.
4660 *
4661 * Swap halves of 16-bit words if needed to convert from
4662 * little-endian byte order to native cpu byte order, or
4663 * vice-versa.
4664 *
4665 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004666 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004667 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004668void swap_buf_le16(u16 *buf, unsigned int buf_words)
4669{
4670#ifdef __BIG_ENDIAN
4671 unsigned int i;
4672
4673 for (i = 0; i < buf_words; i++)
4674 buf[i] = le16_to_cpu(buf[i]);
4675#endif /* __BIG_ENDIAN */
4676}
4677
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004678/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004679 * ata_qc_new - Request an available ATA command, for queueing
Randy Dunlap5eb66fe2009-01-20 16:28:59 -08004680 * @ap: target port
Tejun Heo8a8bc222008-11-10 14:48:21 +09004681 *
4682 * LOCKING:
4683 * None.
4684 */
4685
4686static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4687{
4688 struct ata_queued_cmd *qc = NULL;
4689 unsigned int i;
4690
4691 /* no command while frozen */
4692 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4693 return NULL;
4694
4695 /* the last tag is reserved for internal command. */
4696 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4697 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4698 qc = __ata_qc_from_tag(ap, i);
4699 break;
4700 }
4701
4702 if (qc)
4703 qc->tag = i;
4704
4705 return qc;
4706}
4707
4708/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004709 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004710 * @dev: Device from whom we request an available command structure
4711 *
4712 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004713 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004714 */
4715
Tejun Heo8a8bc222008-11-10 14:48:21 +09004716struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004717{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004718 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004719 struct ata_queued_cmd *qc;
4720
Tejun Heo8a8bc222008-11-10 14:48:21 +09004721 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004722 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004723 qc->scsicmd = NULL;
4724 qc->ap = ap;
4725 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004726
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004727 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004728 }
4729
4730 return qc;
4731}
4732
Tejun Heo8a8bc222008-11-10 14:48:21 +09004733/**
4734 * ata_qc_free - free unused ata_queued_cmd
4735 * @qc: Command to complete
4736 *
4737 * Designed to free unused ata_queued_cmd object
4738 * in case something prevents using it.
4739 *
4740 * LOCKING:
4741 * spin_lock_irqsave(host lock)
4742 */
4743void ata_qc_free(struct ata_queued_cmd *qc)
4744{
Julia Lawalla1104012009-10-17 08:41:47 +02004745 struct ata_port *ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004746 unsigned int tag;
4747
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004748 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Julia Lawalla1104012009-10-17 08:41:47 +02004749 ap = qc->ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004750
4751 qc->flags = 0;
4752 tag = qc->tag;
4753 if (likely(ata_tag_valid(tag))) {
4754 qc->tag = ATA_TAG_POISON;
4755 clear_bit(tag, &ap->qc_allocated);
4756 }
4757}
4758
Tejun Heo76014422006-02-11 15:13:49 +09004759void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004760{
Julia Lawalla1104012009-10-17 08:41:47 +02004761 struct ata_port *ap;
4762 struct ata_link *link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004763
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004764 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4765 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
Julia Lawalla1104012009-10-17 08:41:47 +02004766 ap = qc->ap;
4767 link = qc->dev->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004768
4769 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4770 ata_sg_clean(qc);
4771
Tejun Heo7401abf2006-05-15 20:57:32 +09004772 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004773 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004774 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004775 if (!link->sactive)
4776 ap->nr_active_links--;
4777 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004778 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004779 ap->nr_active_links--;
4780 }
4781
4782 /* clear exclusive status */
4783 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4784 ap->excl_link == link))
4785 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004786
Albert Lee3f3791d2005-08-16 14:25:38 +08004787 /* atapi: mark qc as inactive to prevent the interrupt handler
4788 * from completing the command twice later, before the error handler
4789 * is called. (when rc != 0 and atapi request sense is needed)
4790 */
4791 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004792 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004793
Linus Torvalds1da177e2005-04-16 15:20:36 -07004794 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004795 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004796}
4797
Tejun Heo39599a52006-11-14 22:37:35 +09004798static void fill_result_tf(struct ata_queued_cmd *qc)
4799{
4800 struct ata_port *ap = qc->ap;
4801
Tejun Heo39599a52006-11-14 22:37:35 +09004802 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004803 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004804}
4805
Tejun Heo00115e02007-11-27 19:28:58 +09004806static void ata_verify_xfer(struct ata_queued_cmd *qc)
4807{
4808 struct ata_device *dev = qc->dev;
4809
4810 if (ata_tag_internal(qc->tag))
4811 return;
4812
4813 if (ata_is_nodata(qc->tf.protocol))
4814 return;
4815
4816 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4817 return;
4818
4819 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4820}
4821
Tejun Heof686bcb2006-05-15 20:58:05 +09004822/**
4823 * ata_qc_complete - Complete an active ATA command
4824 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004825 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004826 * Indicate to the mid and upper layers that an ATA command has
4827 * completed, with either an ok or not-ok status.
4828 *
4829 * Refrain from calling this function multiple times when
4830 * successfully completing multiple NCQ commands.
4831 * ata_qc_complete_multiple() should be used instead, which will
4832 * properly update IRQ expect state.
Tejun Heof686bcb2006-05-15 20:58:05 +09004833 *
4834 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004835 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004836 */
4837void ata_qc_complete(struct ata_queued_cmd *qc)
4838{
4839 struct ata_port *ap = qc->ap;
4840
4841 /* XXX: New EH and old EH use different mechanisms to
4842 * synchronize EH with regular execution path.
4843 *
4844 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4845 * Normal execution path is responsible for not accessing a
4846 * failed qc. libata core enforces the rule by returning NULL
4847 * from ata_qc_from_tag() for failed qcs.
4848 *
4849 * Old EH depends on ata_qc_complete() nullifying completion
4850 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4851 * not synchronize with interrupt handler. Only PIO task is
4852 * taken care of.
4853 */
4854 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004855 struct ata_device *dev = qc->dev;
4856 struct ata_eh_info *ehi = &dev->link->eh_info;
4857
Tejun Heof686bcb2006-05-15 20:58:05 +09004858 if (unlikely(qc->err_mask))
4859 qc->flags |= ATA_QCFLAG_FAILED;
4860
4861 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
Tejun Heof4b31db2009-10-16 13:00:51 +09004862 /* always fill result TF for failed qc */
4863 fill_result_tf(qc);
4864
4865 if (!ata_tag_internal(qc->tag))
Tejun Heof686bcb2006-05-15 20:58:05 +09004866 ata_qc_schedule_eh(qc);
Tejun Heof4b31db2009-10-16 13:00:51 +09004867 else
4868 __ata_qc_complete(qc);
4869 return;
Tejun Heof686bcb2006-05-15 20:58:05 +09004870 }
4871
Tejun Heo4dc738e2009-09-17 18:45:27 +09004872 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4873
Tejun Heof686bcb2006-05-15 20:58:05 +09004874 /* read result TF if requested */
4875 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004876 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004877
Tejun Heo4dbfa392007-10-25 18:22:44 +09004878 /* Some commands need post-processing after successful
4879 * completion.
4880 */
4881 switch (qc->tf.command) {
4882 case ATA_CMD_SET_FEATURES:
4883 if (qc->tf.feature != SETFEATURES_WC_ON &&
4884 qc->tf.feature != SETFEATURES_WC_OFF)
4885 break;
4886 /* fall through */
4887 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4888 case ATA_CMD_SET_MULTI: /* multi_count changed */
4889 /* revalidate device */
4890 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4891 ata_port_schedule_eh(ap);
4892 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004893
4894 case ATA_CMD_SLEEP:
4895 dev->flags |= ATA_DFLAG_SLEEPING;
4896 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09004897 }
4898
Tejun Heo00115e02007-11-27 19:28:58 +09004899 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4900 ata_verify_xfer(qc);
4901
Tejun Heof686bcb2006-05-15 20:58:05 +09004902 __ata_qc_complete(qc);
4903 } else {
4904 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4905 return;
4906
4907 /* read result TF if failed or requested */
4908 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004909 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004910
4911 __ata_qc_complete(qc);
4912 }
4913}
4914
Tejun Heodedaf2b2006-05-15 21:03:43 +09004915/**
4916 * ata_qc_complete_multiple - Complete multiple qcs successfully
4917 * @ap: port in question
4918 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09004919 *
4920 * Complete in-flight commands. This functions is meant to be
4921 * called from low-level driver's interrupt routine to complete
4922 * requests normally. ap->qc_active and @qc_active is compared
4923 * and commands are completed accordingly.
4924 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004925 * Always use this function when completing multiple NCQ commands
4926 * from IRQ handlers instead of calling ata_qc_complete()
4927 * multiple times to keep IRQ expect status properly in sync.
4928 *
Tejun Heodedaf2b2006-05-15 21:03:43 +09004929 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004930 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004931 *
4932 * RETURNS:
4933 * Number of completed commands on success, -errno otherwise.
4934 */
Tejun Heo79f97da2008-04-07 22:47:20 +09004935int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004936{
4937 int nr_done = 0;
4938 u32 done_mask;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004939
4940 done_mask = ap->qc_active ^ qc_active;
4941
4942 if (unlikely(done_mask & qc_active)) {
4943 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4944 "(%08x->%08x)\n", ap->qc_active, qc_active);
4945 return -EINVAL;
4946 }
4947
Jens Axboe43768182009-05-20 09:44:39 +02004948 while (done_mask) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004949 struct ata_queued_cmd *qc;
Jens Axboe43768182009-05-20 09:44:39 +02004950 unsigned int tag = __ffs(done_mask);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004951
Jens Axboe43768182009-05-20 09:44:39 +02004952 qc = ata_qc_from_tag(ap, tag);
4953 if (qc) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004954 ata_qc_complete(qc);
4955 nr_done++;
4956 }
Jens Axboe43768182009-05-20 09:44:39 +02004957 done_mask &= ~(1 << tag);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004958 }
4959
4960 return nr_done;
4961}
4962
Linus Torvalds1da177e2005-04-16 15:20:36 -07004963/**
4964 * ata_qc_issue - issue taskfile to device
4965 * @qc: command to issue to device
4966 *
4967 * Prepare an ATA command to submission to device.
4968 * This includes mapping the data into a DMA-able
4969 * area, filling in the S/G table, and finally
4970 * writing the taskfile to hardware, starting the command.
4971 *
4972 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004973 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004974 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004975void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004976{
4977 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004978 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09004979 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004980
Tejun Heodedaf2b2006-05-15 21:03:43 +09004981 /* Make sure only one non-NCQ command is outstanding. The
4982 * check is skipped for old EH because it reuses active qc to
4983 * request ATAPI sense.
4984 */
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004985 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09004986
Tejun Heo1973a022007-12-05 10:36:13 +09004987 if (ata_is_ncq(prot)) {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004988 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09004989
4990 if (!link->sactive)
4991 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004992 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004993 } else {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004994 WARN_ON_ONCE(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09004995
4996 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004997 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004998 }
4999
Tejun Heoe4a70e72006-03-31 20:36:47 +09005000 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005001 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005002
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005003 /*
5004 * We guarantee to LLDs that they will have at least one
Tejun Heof92a2632007-12-05 16:43:10 +09005005 * non-zero sg if the command is a data command.
5006 */
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005007 if (WARN_ON_ONCE(ata_is_data(prot) &&
5008 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5009 goto sys_err;
Tejun Heof92a2632007-12-05 16:43:10 +09005010
Tejun Heo405e66b2007-11-27 19:28:53 +09005011 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09005012 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09005013 if (ata_sg_setup(qc))
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005014 goto sys_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005015
Tejun Heocf480622008-01-24 00:05:14 +09005016 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09005017 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09005018 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005019 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5020 ata_link_abort(link);
5021 return;
5022 }
5023
Linus Torvalds1da177e2005-04-16 15:20:36 -07005024 ap->ops->qc_prep(qc);
5025
Tejun Heo8e0e6942006-03-31 20:41:11 +09005026 qc->err_mask |= ap->ops->qc_issue(qc);
5027 if (unlikely(qc->err_mask))
5028 goto err;
5029 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005030
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005031sys_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09005032 qc->err_mask |= AC_ERR_SYSTEM;
5033err:
5034 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005035}
5036
5037/**
Tejun Heo34bf2172006-05-15 20:57:46 +09005038 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09005039 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09005040 *
Tejun Heo936fd732007-08-06 18:36:23 +09005041 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09005042 *
5043 * LOCKING:
5044 * None.
5045 *
5046 * RETURNS:
5047 * 1 if SCRs are accessible, 0 otherwise.
5048 */
Tejun Heo936fd732007-08-06 18:36:23 +09005049int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005050{
Tejun Heo936fd732007-08-06 18:36:23 +09005051 struct ata_port *ap = link->ap;
5052
Tejun Heoa16abc02007-05-21 18:33:47 +02005053 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005054}
5055
5056/**
5057 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005058 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005059 * @reg: SCR to read
5060 * @val: Place to store read value
5061 *
Tejun Heo936fd732007-08-06 18:36:23 +09005062 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005063 * guaranteed to succeed if @link is ap->link, the cable type of
5064 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005065 *
5066 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005067 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005068 *
5069 * RETURNS:
5070 * 0 on success, negative errno on failure.
5071 */
Tejun Heo936fd732007-08-06 18:36:23 +09005072int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005073{
Tejun Heo633273a2007-09-23 13:19:54 +09005074 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005075 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005076 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005077 return -EOPNOTSUPP;
5078 }
5079
5080 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005081}
5082
5083/**
5084 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005085 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005086 * @reg: SCR to write
5087 * @val: value to write
5088 *
Tejun Heo936fd732007-08-06 18:36:23 +09005089 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005090 * guaranteed to succeed if @link is ap->link, the cable type of
5091 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005092 *
5093 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005094 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005095 *
5096 * RETURNS:
5097 * 0 on success, negative errno on failure.
5098 */
Tejun Heo936fd732007-08-06 18:36:23 +09005099int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005100{
Tejun Heo633273a2007-09-23 13:19:54 +09005101 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005102 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005103 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005104 return -EOPNOTSUPP;
5105 }
5106
5107 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005108}
5109
5110/**
5111 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005112 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005113 * @reg: SCR to write
5114 * @val: value to write
5115 *
5116 * This function is identical to sata_scr_write() except that this
5117 * function performs flush after writing to the register.
5118 *
5119 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005120 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005121 *
5122 * RETURNS:
5123 * 0 on success, negative errno on failure.
5124 */
Tejun Heo936fd732007-08-06 18:36:23 +09005125int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005126{
Tejun Heo633273a2007-09-23 13:19:54 +09005127 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005128 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005129
Tejun Heo633273a2007-09-23 13:19:54 +09005130 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005131 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005132 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005133 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a2007-09-23 13:19:54 +09005134 return rc;
5135 }
5136 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005137 }
Tejun Heo633273a2007-09-23 13:19:54 +09005138
5139 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005140}
5141
5142/**
Tejun Heob1c72912008-07-31 17:02:43 +09005143 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005144 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005145 *
Tejun Heo936fd732007-08-06 18:36:23 +09005146 * Test whether @link is online. Note that this function returns
5147 * 0 if online status of @link cannot be obtained, so
5148 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005149 *
5150 * LOCKING:
5151 * None.
5152 *
5153 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005154 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005155 */
Tejun Heob1c72912008-07-31 17:02:43 +09005156bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005157{
5158 u32 sstatus;
5159
Tejun Heo936fd732007-08-06 18:36:23 +09005160 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005161 ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005162 return true;
5163 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005164}
5165
5166/**
Tejun Heob1c72912008-07-31 17:02:43 +09005167 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005168 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005169 *
Tejun Heo936fd732007-08-06 18:36:23 +09005170 * Test whether @link is offline. Note that this function
5171 * returns 0 if offline status of @link cannot be obtained, so
5172 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005173 *
5174 * LOCKING:
5175 * None.
5176 *
5177 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005178 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005179 */
Tejun Heob1c72912008-07-31 17:02:43 +09005180bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005181{
5182 u32 sstatus;
5183
Tejun Heo936fd732007-08-06 18:36:23 +09005184 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005185 !ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005186 return true;
5187 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005188}
Edward Falk0baab862005-06-02 18:17:13 -04005189
Tejun Heob1c72912008-07-31 17:02:43 +09005190/**
5191 * ata_link_online - test whether the given link is online
5192 * @link: ATA link to test
5193 *
5194 * Test whether @link is online. This is identical to
5195 * ata_phys_link_online() when there's no slave link. When
5196 * there's a slave link, this function should only be called on
5197 * the master link and will return true if any of M/S links is
5198 * online.
5199 *
5200 * LOCKING:
5201 * None.
5202 *
5203 * RETURNS:
5204 * True if the port online status is available and online.
5205 */
5206bool ata_link_online(struct ata_link *link)
5207{
5208 struct ata_link *slave = link->ap->slave_link;
5209
5210 WARN_ON(link == slave); /* shouldn't be called on slave link */
5211
5212 return ata_phys_link_online(link) ||
5213 (slave && ata_phys_link_online(slave));
5214}
5215
5216/**
5217 * ata_link_offline - test whether the given link is offline
5218 * @link: ATA link to test
5219 *
5220 * Test whether @link is offline. This is identical to
5221 * ata_phys_link_offline() when there's no slave link. When
5222 * there's a slave link, this function should only be called on
5223 * the master link and will return true if both M/S links are
5224 * offline.
5225 *
5226 * LOCKING:
5227 * None.
5228 *
5229 * RETURNS:
5230 * True if the port offline status is available and offline.
5231 */
5232bool ata_link_offline(struct ata_link *link)
5233{
5234 struct ata_link *slave = link->ap->slave_link;
5235
5236 WARN_ON(link == slave); /* shouldn't be called on slave link */
5237
5238 return ata_phys_link_offline(link) &&
5239 (!slave || ata_phys_link_offline(slave));
5240}
5241
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005242#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04005243static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5244 unsigned int action, unsigned int ehi_flags,
5245 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005246{
5247 unsigned long flags;
5248 int i, rc;
5249
Jeff Garzikcca39742006-08-24 03:19:22 -04005250 for (i = 0; i < host->n_ports; i++) {
5251 struct ata_port *ap = host->ports[i];
Tejun Heoe3667eb2007-08-06 18:36:24 +09005252 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005253
5254 /* Previous resume operation might still be in
5255 * progress. Wait for PM_PENDING to clear.
5256 */
5257 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5258 ata_port_wait_eh(ap);
5259 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5260 }
5261
5262 /* request PM ops to EH */
5263 spin_lock_irqsave(ap->lock, flags);
5264
5265 ap->pm_mesg = mesg;
5266 if (wait) {
5267 rc = 0;
5268 ap->pm_result = &rc;
5269 }
5270
5271 ap->pflags |= ATA_PFLAG_PM_PENDING;
Tejun Heo1eca4362008-11-03 20:03:17 +09005272 ata_for_each_link(link, ap, HOST_FIRST) {
Tejun Heoe3667eb2007-08-06 18:36:24 +09005273 link->eh_info.action |= action;
5274 link->eh_info.flags |= ehi_flags;
5275 }
Tejun Heo500530f2006-07-03 16:07:27 +09005276
5277 ata_port_schedule_eh(ap);
5278
5279 spin_unlock_irqrestore(ap->lock, flags);
5280
5281 /* wait and check result */
5282 if (wait) {
5283 ata_port_wait_eh(ap);
5284 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5285 if (rc)
5286 return rc;
5287 }
5288 }
5289
5290 return 0;
5291}
5292
5293/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005294 * ata_host_suspend - suspend host
5295 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005296 * @mesg: PM message
5297 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005298 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005299 * function requests EH to perform PM operations and waits for EH
5300 * to finish.
5301 *
5302 * LOCKING:
5303 * Kernel thread context (may sleep).
5304 *
5305 * RETURNS:
5306 * 0 on success, -errno on failure.
5307 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005308int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005309{
Tejun Heoe2f3d752010-09-07 14:05:31 +02005310 unsigned int ehi_flags = ATA_EHI_QUIET;
Tejun Heo9666f402007-05-04 21:27:47 +02005311 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005312
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005313 /*
Tejun Heoe2f3d752010-09-07 14:05:31 +02005314 * On some hardware, device fails to respond after spun down
5315 * for suspend. As the device won't be used before being
5316 * resumed, we don't need to touch the device. Ask EH to skip
5317 * the usual stuff and proceed directly to suspend.
5318 *
5319 * http://thread.gmane.org/gmane.linux.ide/46764
5320 */
5321 if (mesg.event == PM_EVENT_SUSPEND)
5322 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5323
5324 rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005325 if (rc == 0)
5326 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005327 return rc;
5328}
5329
5330/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005331 * ata_host_resume - resume host
5332 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005333 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005334 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005335 * function requests EH to perform PM operations and returns.
5336 * Note that all resume operations are performed parallely.
5337 *
5338 * LOCKING:
5339 * Kernel thread context (may sleep).
5340 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005341void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005342{
Tejun Heocf480622008-01-24 00:05:14 +09005343 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
Jeff Garzikcca39742006-08-24 03:19:22 -04005344 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005345 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005346}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005347#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005348
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005349/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005350 * ata_dev_init - Initialize an ata_device structure
5351 * @dev: Device structure to initialize
5352 *
5353 * Initialize @dev in preparation for probing.
5354 *
5355 * LOCKING:
5356 * Inherited from caller.
5357 */
5358void ata_dev_init(struct ata_device *dev)
5359{
Tejun Heob1c72912008-07-31 17:02:43 +09005360 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005361 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005362 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005363
Tejun Heob1c72912008-07-31 17:02:43 +09005364 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005365 link->sata_spd_limit = link->hw_sata_spd_limit;
5366 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005367
Tejun Heo72fa4b72006-05-31 18:27:32 +09005368 /* High bits of dev->flags are used to record warm plug
5369 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005370 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005371 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005372 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005373 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005374 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005375 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005376
Tejun Heo99cf6102009-01-29 20:31:32 +09005377 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5378 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005379 dev->pio_mask = UINT_MAX;
5380 dev->mwdma_mask = UINT_MAX;
5381 dev->udma_mask = UINT_MAX;
5382}
5383
5384/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005385 * ata_link_init - Initialize an ata_link structure
5386 * @ap: ATA port link is attached to
5387 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005388 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005389 *
5390 * Initialize @link.
5391 *
5392 * LOCKING:
5393 * Kernel thread context (may sleep)
5394 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005395void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005396{
5397 int i;
5398
5399 /* clear everything except for devices */
Gwendal Grignoud9027472010-05-25 12:31:38 -07005400 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5401 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005402
5403 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005404 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005405 link->active_tag = ATA_TAG_POISON;
5406 link->hw_sata_spd_limit = UINT_MAX;
5407
5408 /* can't use iterator, ap isn't initialized yet */
5409 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5410 struct ata_device *dev = &link->device[i];
5411
5412 dev->link = link;
5413 dev->devno = dev - link->device;
Tejun Heo110f66d2009-09-16 04:17:28 +09005414#ifdef CONFIG_ATA_ACPI
5415 dev->gtf_filter = ata_acpi_gtf_filter;
5416#endif
Tejun Heo4fb37a22007-08-06 18:36:23 +09005417 ata_dev_init(dev);
5418 }
5419}
5420
5421/**
5422 * sata_link_init_spd - Initialize link->sata_spd_limit
5423 * @link: Link to configure sata_spd_limit for
5424 *
5425 * Initialize @link->[hw_]sata_spd_limit to the currently
5426 * configured value.
5427 *
5428 * LOCKING:
5429 * Kernel thread context (may sleep).
5430 *
5431 * RETURNS:
5432 * 0 on success, -errno on failure.
5433 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005434int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005435{
Tejun Heo33267322008-02-13 09:15:09 +09005436 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005437 int rc;
5438
Tejun Heod127ea72008-07-31 16:09:34 +09005439 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005440 if (rc)
5441 return rc;
5442
Tejun Heod127ea72008-07-31 16:09:34 +09005443 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005444 if (spd)
5445 link->hw_sata_spd_limit &= (1 << spd) - 1;
5446
Tejun Heo05944bd2008-08-13 20:19:09 +09005447 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005448
Tejun Heo4fb37a22007-08-06 18:36:23 +09005449 link->sata_spd_limit = link->hw_sata_spd_limit;
5450
5451 return 0;
5452}
5453
5454/**
Tejun Heof3187192007-04-17 23:44:07 +09005455 * ata_port_alloc - allocate and initialize basic ATA port resources
5456 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005457 *
Tejun Heof3187192007-04-17 23:44:07 +09005458 * Allocate and initialize basic ATA port resources.
5459 *
5460 * RETURNS:
5461 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005462 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005463 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005464 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005465 */
Tejun Heof3187192007-04-17 23:44:07 +09005466struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005467{
Tejun Heof3187192007-04-17 23:44:07 +09005468 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005469
Tejun Heof3187192007-04-17 23:44:07 +09005470 DPRINTK("ENTER\n");
5471
5472 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5473 if (!ap)
5474 return NULL;
Gwendal Grignoud9027472010-05-25 12:31:38 -07005475
Tejun Heof4d6d002007-05-01 11:50:15 +02005476 ap->pflags |= ATA_PFLAG_INITIALIZING;
Jeff Garzikcca39742006-08-24 03:19:22 -04005477 ap->lock = &host->lock;
Tejun Heof3187192007-04-17 23:44:07 +09005478 ap->print_id = -1;
Jeff Garzikcca39742006-08-24 03:19:22 -04005479 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005480 ap->dev = host->dev;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005481
5482#if defined(ATA_VERBOSE_DEBUG)
5483 /* turn on all debugging levels */
5484 ap->msg_enable = 0x00FF;
5485#elif defined(ATA_DEBUG)
5486 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 +09005487#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005488 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005489#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005490
Tejun Heoad72cf92010-07-02 10:03:52 +02005491 mutex_init(&ap->scsi_scan_mutex);
David Howells65f27f32006-11-22 14:55:48 +00005492 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5493 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005494 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005495 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005496 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005497 init_timer_deferrable(&ap->fastdrain_timer);
5498 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5499 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005500
Tejun Heo838df622006-05-15 20:57:44 +09005501 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005502
Tejun Heo89898052007-08-06 18:36:23 +09005503 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005504
5505#ifdef ATA_IRQ_TRAP
5506 ap->stats.unhandled_irq = 1;
5507 ap->stats.idle_irq = 1;
5508#endif
Tejun Heo270390e2010-05-10 21:41:35 +02005509 ata_sff_port_init(ap);
5510
Linus Torvalds1da177e2005-04-16 15:20:36 -07005511 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005512}
5513
Tejun Heof0d36ef2007-01-20 16:00:28 +09005514static void ata_host_release(struct device *gendev, void *res)
5515{
5516 struct ata_host *host = dev_get_drvdata(gendev);
5517 int i;
5518
5519 for (i = 0; i < host->n_ports; i++) {
5520 struct ata_port *ap = host->ports[i];
5521
Tejun Heoecef7252007-04-17 23:44:06 +09005522 if (!ap)
5523 continue;
5524
Tejun Heo49114872007-04-17 23:44:06 +09005525 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005526 scsi_host_put(ap->scsi_host);
5527
Tejun Heo633273a2007-09-23 13:19:54 +09005528 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005529 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005530 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005531 host->ports[i] = NULL;
5532 }
5533
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005534 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005535}
5536
Linus Torvalds1da177e2005-04-16 15:20:36 -07005537/**
Tejun Heof3187192007-04-17 23:44:07 +09005538 * ata_host_alloc - allocate and init basic ATA host resources
5539 * @dev: generic device this host is associated with
5540 * @max_ports: maximum number of ATA ports associated with this host
5541 *
5542 * Allocate and initialize basic ATA host resources. LLD calls
5543 * this function to allocate a host, initializes it fully and
5544 * attaches it using ata_host_register().
5545 *
5546 * @max_ports ports are allocated and host->n_ports is
5547 * initialized to @max_ports. The caller is allowed to decrease
5548 * host->n_ports before calling ata_host_register(). The unused
5549 * ports will be automatically freed on registration.
5550 *
5551 * RETURNS:
5552 * Allocate ATA host on success, NULL on failure.
5553 *
5554 * LOCKING:
5555 * Inherited from calling layer (may sleep).
5556 */
5557struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5558{
5559 struct ata_host *host;
5560 size_t sz;
5561 int i;
5562
5563 DPRINTK("ENTER\n");
5564
5565 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5566 return NULL;
5567
5568 /* alloc a container for our list of ATA ports (buses) */
5569 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5570 /* alloc a container for our list of ATA ports (buses) */
5571 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5572 if (!host)
5573 goto err_out;
5574
5575 devres_add(dev, host);
5576 dev_set_drvdata(dev, host);
5577
5578 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02005579 mutex_init(&host->eh_mutex);
Tejun Heof3187192007-04-17 23:44:07 +09005580 host->dev = dev;
5581 host->n_ports = max_ports;
5582
5583 /* allocate ports bound to this host */
5584 for (i = 0; i < max_ports; i++) {
5585 struct ata_port *ap;
5586
5587 ap = ata_port_alloc(host);
5588 if (!ap)
5589 goto err_out;
5590
5591 ap->port_no = i;
5592 host->ports[i] = ap;
5593 }
5594
5595 devres_remove_group(dev, NULL);
5596 return host;
5597
5598 err_out:
5599 devres_release_group(dev, NULL);
5600 return NULL;
5601}
5602
5603/**
Tejun Heof5cda252007-04-17 23:44:07 +09005604 * ata_host_alloc_pinfo - alloc host and init with port_info array
5605 * @dev: generic device this host is associated with
5606 * @ppi: array of ATA port_info to initialize host with
5607 * @n_ports: number of ATA ports attached to this host
5608 *
5609 * Allocate ATA host and initialize with info from @ppi. If NULL
5610 * terminated, @ppi may contain fewer entries than @n_ports. The
5611 * last entry will be used for the remaining ports.
5612 *
5613 * RETURNS:
5614 * Allocate ATA host on success, NULL on failure.
5615 *
5616 * LOCKING:
5617 * Inherited from calling layer (may sleep).
5618 */
5619struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5620 const struct ata_port_info * const * ppi,
5621 int n_ports)
5622{
5623 const struct ata_port_info *pi;
5624 struct ata_host *host;
5625 int i, j;
5626
5627 host = ata_host_alloc(dev, n_ports);
5628 if (!host)
5629 return NULL;
5630
5631 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5632 struct ata_port *ap = host->ports[i];
5633
5634 if (ppi[j])
5635 pi = ppi[j++];
5636
5637 ap->pio_mask = pi->pio_mask;
5638 ap->mwdma_mask = pi->mwdma_mask;
5639 ap->udma_mask = pi->udma_mask;
5640 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005641 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005642 ap->ops = pi->port_ops;
5643
5644 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5645 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005646 }
5647
5648 return host;
5649}
5650
Tejun Heob1c72912008-07-31 17:02:43 +09005651/**
5652 * ata_slave_link_init - initialize slave link
5653 * @ap: port to initialize slave link for
5654 *
5655 * Create and initialize slave link for @ap. This enables slave
5656 * link handling on the port.
5657 *
5658 * In libata, a port contains links and a link contains devices.
5659 * There is single host link but if a PMP is attached to it,
5660 * there can be multiple fan-out links. On SATA, there's usually
5661 * a single device connected to a link but PATA and SATA
5662 * controllers emulating TF based interface can have two - master
5663 * and slave.
5664 *
5665 * However, there are a few controllers which don't fit into this
5666 * abstraction too well - SATA controllers which emulate TF
5667 * interface with both master and slave devices but also have
5668 * separate SCR register sets for each device. These controllers
5669 * need separate links for physical link handling
5670 * (e.g. onlineness, link speed) but should be treated like a
5671 * traditional M/S controller for everything else (e.g. command
5672 * issue, softreset).
5673 *
5674 * slave_link is libata's way of handling this class of
5675 * controllers without impacting core layer too much. For
5676 * anything other than physical link handling, the default host
5677 * link is used for both master and slave. For physical link
5678 * handling, separate @ap->slave_link is used. All dirty details
5679 * are implemented inside libata core layer. From LLD's POV, the
5680 * only difference is that prereset, hardreset and postreset are
5681 * called once more for the slave link, so the reset sequence
5682 * looks like the following.
5683 *
5684 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5685 * softreset(M) -> postreset(M) -> postreset(S)
5686 *
5687 * Note that softreset is called only for the master. Softreset
5688 * resets both M/S by definition, so SRST on master should handle
5689 * both (the standard method will work just fine).
5690 *
5691 * LOCKING:
5692 * Should be called before host is registered.
5693 *
5694 * RETURNS:
5695 * 0 on success, -errno on failure.
5696 */
5697int ata_slave_link_init(struct ata_port *ap)
5698{
5699 struct ata_link *link;
5700
5701 WARN_ON(ap->slave_link);
5702 WARN_ON(ap->flags & ATA_FLAG_PMP);
5703
5704 link = kzalloc(sizeof(*link), GFP_KERNEL);
5705 if (!link)
5706 return -ENOMEM;
5707
5708 ata_link_init(ap, link, 1);
5709 ap->slave_link = link;
5710 return 0;
5711}
5712
Tejun Heo32ebbc02007-11-08 13:09:00 +09005713static void ata_host_stop(struct device *gendev, void *res)
5714{
5715 struct ata_host *host = dev_get_drvdata(gendev);
5716 int i;
5717
5718 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5719
5720 for (i = 0; i < host->n_ports; i++) {
5721 struct ata_port *ap = host->ports[i];
5722
5723 if (ap->ops->port_stop)
5724 ap->ops->port_stop(ap);
5725 }
5726
5727 if (host->ops->host_stop)
5728 host->ops->host_stop(host);
5729}
5730
Tejun Heof5cda252007-04-17 23:44:07 +09005731/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005732 * ata_finalize_port_ops - finalize ata_port_operations
5733 * @ops: ata_port_operations to finalize
5734 *
5735 * An ata_port_operations can inherit from another ops and that
5736 * ops can again inherit from another. This can go on as many
5737 * times as necessary as long as there is no loop in the
5738 * inheritance chain.
5739 *
5740 * Ops tables are finalized when the host is started. NULL or
5741 * unspecified entries are inherited from the closet ancestor
5742 * which has the method and the entry is populated with it.
5743 * After finalization, the ops table directly points to all the
5744 * methods and ->inherits is no longer necessary and cleared.
5745 *
5746 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5747 *
5748 * LOCKING:
5749 * None.
5750 */
5751static void ata_finalize_port_ops(struct ata_port_operations *ops)
5752{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305753 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005754 const struct ata_port_operations *cur;
5755 void **begin = (void **)ops;
5756 void **end = (void **)&ops->inherits;
5757 void **pp;
5758
5759 if (!ops || !ops->inherits)
5760 return;
5761
5762 spin_lock(&lock);
5763
5764 for (cur = ops->inherits; cur; cur = cur->inherits) {
5765 void **inherit = (void **)cur;
5766
5767 for (pp = begin; pp < end; pp++, inherit++)
5768 if (!*pp)
5769 *pp = *inherit;
5770 }
5771
5772 for (pp = begin; pp < end; pp++)
5773 if (IS_ERR(*pp))
5774 *pp = NULL;
5775
5776 ops->inherits = NULL;
5777
5778 spin_unlock(&lock);
5779}
5780
5781/**
Tejun Heoecef7252007-04-17 23:44:06 +09005782 * ata_host_start - start and freeze ports of an ATA host
5783 * @host: ATA host to start ports for
5784 *
5785 * Start and then freeze ports of @host. Started status is
5786 * recorded in host->flags, so this function can be called
5787 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005788 * once. If host->ops isn't initialized yet, its set to the
5789 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005790 *
5791 * LOCKING:
5792 * Inherited from calling layer (may sleep).
5793 *
5794 * RETURNS:
5795 * 0 if all ports are started successfully, -errno otherwise.
5796 */
5797int ata_host_start(struct ata_host *host)
5798{
Tejun Heo32ebbc02007-11-08 13:09:00 +09005799 int have_stop = 0;
5800 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09005801 int i, rc;
5802
5803 if (host->flags & ATA_HOST_STARTED)
5804 return 0;
5805
Tejun Heo029cfd62008-03-25 12:22:49 +09005806 ata_finalize_port_ops(host->ops);
5807
Tejun Heoecef7252007-04-17 23:44:06 +09005808 for (i = 0; i < host->n_ports; i++) {
5809 struct ata_port *ap = host->ports[i];
5810
Tejun Heo029cfd62008-03-25 12:22:49 +09005811 ata_finalize_port_ops(ap->ops);
5812
Tejun Heof3187192007-04-17 23:44:07 +09005813 if (!host->ops && !ata_port_is_dummy(ap))
5814 host->ops = ap->ops;
5815
Tejun Heo32ebbc02007-11-08 13:09:00 +09005816 if (ap->ops->port_stop)
5817 have_stop = 1;
5818 }
5819
5820 if (host->ops->host_stop)
5821 have_stop = 1;
5822
5823 if (have_stop) {
5824 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5825 if (!start_dr)
5826 return -ENOMEM;
5827 }
5828
5829 for (i = 0; i < host->n_ports; i++) {
5830 struct ata_port *ap = host->ports[i];
5831
Tejun Heoecef7252007-04-17 23:44:06 +09005832 if (ap->ops->port_start) {
5833 rc = ap->ops->port_start(ap);
5834 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00005835 if (rc != -ENODEV)
Andrew Morton0f757742008-01-10 14:33:09 -08005836 dev_printk(KERN_ERR, host->dev,
5837 "failed to start port %d "
5838 "(errno=%d)\n", i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09005839 goto err_out;
5840 }
5841 }
Tejun Heoecef7252007-04-17 23:44:06 +09005842 ata_eh_freeze_port(ap);
5843 }
5844
Tejun Heo32ebbc02007-11-08 13:09:00 +09005845 if (start_dr)
5846 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005847 host->flags |= ATA_HOST_STARTED;
5848 return 0;
5849
5850 err_out:
5851 while (--i >= 0) {
5852 struct ata_port *ap = host->ports[i];
5853
5854 if (ap->ops->port_stop)
5855 ap->ops->port_stop(ap);
5856 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09005857 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005858 return rc;
5859}
5860
5861/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005862 * ata_sas_host_init - Initialize a host struct
5863 * @host: host to initialize
5864 * @dev: device host is attached to
5865 * @flags: host flags
5866 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005867 *
5868 * LOCKING:
5869 * PCI/etc. bus probe sem.
5870 *
5871 */
Tejun Heof3187192007-04-17 23:44:07 +09005872/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04005873void ata_host_init(struct ata_host *host, struct device *dev,
Tejun Heo029cfd62008-03-25 12:22:49 +09005874 unsigned long flags, struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005875{
Jeff Garzikcca39742006-08-24 03:19:22 -04005876 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02005877 mutex_init(&host->eh_mutex);
Jeff Garzikcca39742006-08-24 03:19:22 -04005878 host->dev = dev;
5879 host->flags = flags;
5880 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005881}
5882
Arjan van de Ven79318052009-01-04 05:32:28 -08005883
5884static void async_port_probe(void *data, async_cookie_t cookie)
5885{
5886 int rc;
5887 struct ata_port *ap = data;
Arjan van de Ven886ad092009-01-09 15:54:07 -08005888
5889 /*
5890 * If we're not allowed to scan this host in parallel,
5891 * we need to wait until all previous scans have completed
5892 * before going further.
Arjan van de Venfa853a42009-01-10 10:18:44 -08005893 * Jeff Garzik says this is only within a controller, so we
5894 * don't need to wait for port 0, only for later ports.
Arjan van de Ven886ad092009-01-09 15:54:07 -08005895 */
Arjan van de Venfa853a42009-01-10 10:18:44 -08005896 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
Arjan van de Ven886ad092009-01-09 15:54:07 -08005897 async_synchronize_cookie(cookie);
5898
Arjan van de Ven79318052009-01-04 05:32:28 -08005899 /* probe */
5900 if (ap->ops->error_handler) {
5901 struct ata_eh_info *ehi = &ap->link.eh_info;
5902 unsigned long flags;
5903
Arjan van de Ven79318052009-01-04 05:32:28 -08005904 /* kick EH for boot probing */
5905 spin_lock_irqsave(ap->lock, flags);
5906
5907 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heo6b7ae952010-09-01 17:50:06 +02005908 ehi->action |= ATA_EH_RESET;
Arjan van de Ven79318052009-01-04 05:32:28 -08005909 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5910
5911 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5912 ap->pflags |= ATA_PFLAG_LOADING;
5913 ata_port_schedule_eh(ap);
5914
5915 spin_unlock_irqrestore(ap->lock, flags);
5916
5917 /* wait for EH to finish */
5918 ata_port_wait_eh(ap);
5919 } else {
5920 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5921 rc = ata_bus_probe(ap);
5922 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5923
5924 if (rc) {
5925 /* FIXME: do something useful here?
5926 * Current libata behavior will
5927 * tear down everything when
5928 * the module is removed
5929 * or the h/w is unplugged.
5930 */
5931 }
5932 }
Arjan van de Venf29d3b22009-01-05 15:07:07 -08005933
5934 /* in order to keep device order, we need to synchronize at this point */
5935 async_synchronize_cookie(cookie);
5936
5937 ata_scsi_scan_host(ap, 1);
5938
Arjan van de Ven79318052009-01-04 05:32:28 -08005939}
Brian Kingb03732f2006-08-07 14:27:10 -05005940/**
Tejun Heof3187192007-04-17 23:44:07 +09005941 * ata_host_register - register initialized ATA host
5942 * @host: ATA host to register
5943 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04005944 *
Tejun Heof3187192007-04-17 23:44:07 +09005945 * Register initialized ATA host. @host is allocated using
5946 * ata_host_alloc() and fully initialized by LLD. This function
5947 * starts ports, registers @host with ATA and SCSI layers and
5948 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005949 *
5950 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005951 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005952 *
5953 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09005954 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005955 */
Tejun Heof3187192007-04-17 23:44:07 +09005956int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005957{
Tejun Heof3187192007-04-17 23:44:07 +09005958 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005959
Tejun Heof3187192007-04-17 23:44:07 +09005960 /* host must have been started */
5961 if (!(host->flags & ATA_HOST_STARTED)) {
5962 dev_printk(KERN_ERR, host->dev,
5963 "BUG: trying to register unstarted host\n");
5964 WARN_ON(1);
5965 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01005966 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09005967
Tejun Heof3187192007-04-17 23:44:07 +09005968 /* Blow away unused ports. This happens when LLD can't
5969 * determine the exact number of ports to allocate at
5970 * allocation time.
5971 */
5972 for (i = host->n_ports; host->ports[i]; i++)
5973 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005974
Tejun Heof3187192007-04-17 23:44:07 +09005975 /* give ports names and add SCSI hosts */
5976 for (i = 0; i < host->n_ports; i++)
5977 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09005978
Gwendal Grignoud9027472010-05-25 12:31:38 -07005979
5980 /* Create associated sysfs transport objects */
5981 for (i = 0; i < host->n_ports; i++) {
5982 rc = ata_tport_add(host->dev,host->ports[i]);
5983 if (rc) {
5984 goto err_tadd;
5985 }
5986 }
5987
Tejun Heof3187192007-04-17 23:44:07 +09005988 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09005989 if (rc)
Gwendal Grignoud9027472010-05-25 12:31:38 -07005990 goto err_tadd;
Tejun Heoecef7252007-04-17 23:44:06 +09005991
Tejun Heofafbae82007-05-15 03:28:16 +09005992 /* associate with ACPI nodes */
5993 ata_acpi_associate(host);
5994
Tejun Heof3187192007-04-17 23:44:07 +09005995 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04005996 for (i = 0; i < host->n_ports; i++) {
5997 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09005998 unsigned long xfer_mask;
5999
6000 /* set SATA cable type if still unset */
6001 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6002 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006003
Tejun Heo5a04bf42006-05-31 18:27:38 +09006004 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09006005 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09006006 if (ap->slave_link)
6007 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09006008
Tejun Heocbcdd872007-08-18 13:14:55 +09006009 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09006010 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6011 ap->udma_mask);
6012
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006013 if (!ata_port_is_dummy(ap)) {
Tejun Heocbcdd872007-08-18 13:14:55 +09006014 ata_port_printk(ap, KERN_INFO,
6015 "%cATA max %s %s\n",
Tejun Heoa16abc02007-05-21 18:33:47 +02006016 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
Tejun Heof3187192007-04-17 23:44:07 +09006017 ata_mode_string(xfer_mask),
Tejun Heocbcdd872007-08-18 13:14:55 +09006018 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006019 ata_ehi_clear_desc(&ap->link.eh_info);
6020 } else
Tejun Heof3187192007-04-17 23:44:07 +09006021 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6022 }
6023
Vegard Nossumf6005352009-04-08 18:19:39 +02006024 /* perform each probe asynchronously */
Tejun Heof3187192007-04-17 23:44:07 +09006025 for (i = 0; i < host->n_ports; i++) {
6026 struct ata_port *ap = host->ports[i];
Arjan van de Ven79318052009-01-04 05:32:28 -08006027 async_schedule(async_port_probe, ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006028 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006029
Tejun Heof3187192007-04-17 23:44:07 +09006030 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006031
6032 err_tadd:
6033 while (--i >= 0) {
6034 ata_tport_delete(host->ports[i]);
6035 }
6036 return rc;
6037
Tejun Heof3187192007-04-17 23:44:07 +09006038}
6039
6040/**
Tejun Heof5cda252007-04-17 23:44:07 +09006041 * ata_host_activate - start host, request IRQ and register it
6042 * @host: target ATA host
6043 * @irq: IRQ to request
6044 * @irq_handler: irq_handler used when requesting IRQ
6045 * @irq_flags: irq_flags used when requesting IRQ
6046 * @sht: scsi_host_template to use when registering the host
6047 *
6048 * After allocating an ATA host and initializing it, most libata
6049 * LLDs perform three steps to activate the host - start host,
6050 * request IRQ and register it. This helper takes necessasry
6051 * arguments and performs the three steps in one go.
6052 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006053 * An invalid IRQ skips the IRQ registration and expects the host to
6054 * have set polling mode on the port. In this case, @irq_handler
6055 * should be NULL.
6056 *
Tejun Heof5cda252007-04-17 23:44:07 +09006057 * LOCKING:
6058 * Inherited from calling layer (may sleep).
6059 *
6060 * RETURNS:
6061 * 0 on success, -errno otherwise.
6062 */
6063int ata_host_activate(struct ata_host *host, int irq,
6064 irq_handler_t irq_handler, unsigned long irq_flags,
6065 struct scsi_host_template *sht)
6066{
Tejun Heocbcdd872007-08-18 13:14:55 +09006067 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006068
6069 rc = ata_host_start(host);
6070 if (rc)
6071 return rc;
6072
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006073 /* Special case for polling mode */
6074 if (!irq) {
6075 WARN_ON(irq_handler);
6076 return ata_host_register(host, sht);
6077 }
6078
Tejun Heof5cda252007-04-17 23:44:07 +09006079 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6080 dev_driver_string(host->dev), host);
6081 if (rc)
6082 return rc;
6083
Tejun Heocbcdd872007-08-18 13:14:55 +09006084 for (i = 0; i < host->n_ports; i++)
6085 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006086
Tejun Heof5cda252007-04-17 23:44:07 +09006087 rc = ata_host_register(host, sht);
6088 /* if failed, just free the IRQ and leave ports alone */
6089 if (rc)
6090 devm_free_irq(host->dev, irq, host);
6091
6092 return rc;
6093}
6094
6095/**
Tejun Heo720ba122006-05-31 18:28:13 +09006096 * ata_port_detach - Detach ATA port in prepration of device removal
6097 * @ap: ATA port to be detached
6098 *
6099 * Detach all ATA devices and the associated SCSI devices of @ap;
6100 * then, remove the associated SCSI host. @ap is guaranteed to
6101 * be quiescent on return from this function.
6102 *
6103 * LOCKING:
6104 * Kernel thread context (may sleep).
6105 */
Adrian Bunk741b7762007-10-24 18:23:06 +02006106static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09006107{
6108 unsigned long flags;
Tejun Heo720ba122006-05-31 18:28:13 +09006109
6110 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006111 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006112
6113 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006114 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006115 ap->pflags |= ATA_PFLAG_UNLOADING;
Tejun Heoece180d2008-11-03 20:04:37 +09006116 ata_port_schedule_eh(ap);
Jeff Garzikba6a1302006-06-22 23:46:10 -04006117 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006118
Tejun Heoece180d2008-11-03 20:04:37 +09006119 /* wait till EH commits suicide */
Tejun Heo720ba122006-05-31 18:28:13 +09006120 ata_port_wait_eh(ap);
6121
Tejun Heoece180d2008-11-03 20:04:37 +09006122 /* it better be dead now */
6123 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
Tejun Heo720ba122006-05-31 18:28:13 +09006124
Oleg Nesterov45a66c12007-07-09 11:46:13 -07006125 cancel_rearming_delayed_work(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006126
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006127 skip_eh:
Gwendal Grignoud9027472010-05-25 12:31:38 -07006128 if (ap->pmp_link) {
6129 int i;
6130 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6131 ata_tlink_delete(&ap->pmp_link[i]);
6132 }
6133 ata_tport_delete(ap);
6134
Tejun Heo720ba122006-05-31 18:28:13 +09006135 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006136 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006137}
6138
6139/**
Tejun Heo0529c152007-01-20 16:00:26 +09006140 * ata_host_detach - Detach all ports of an ATA host
6141 * @host: Host to detach
6142 *
6143 * Detach all ports of @host.
6144 *
6145 * LOCKING:
6146 * Kernel thread context (may sleep).
6147 */
6148void ata_host_detach(struct ata_host *host)
6149{
6150 int i;
6151
6152 for (i = 0; i < host->n_ports; i++)
6153 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006154
6155 /* the host is dead now, dissociate ACPI */
6156 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09006157}
6158
Jeff Garzik374b1872005-08-30 05:42:52 -04006159#ifdef CONFIG_PCI
6160
Edward Falk0baab862005-06-02 18:17:13 -04006161/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006162 * ata_pci_remove_one - PCI layer callback for device removal
6163 * @pdev: PCI device that was removed
6164 *
Tejun Heob878ca52007-01-20 16:00:28 +09006165 * PCI layer indicates to libata via this hook that hot-unplug or
6166 * module unload event has occurred. Detach all ports. Resource
6167 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006168 *
6169 * LOCKING:
6170 * Inherited from PCI layer (may sleep).
6171 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006172void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006173{
Jeff Garzik28555682007-10-11 17:12:35 -04006174 struct device *dev = &pdev->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006175 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006176
Tejun Heob878ca52007-01-20 16:00:28 +09006177 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006178}
6179
6180/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006181int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006182{
6183 unsigned long tmp = 0;
6184
6185 switch (bits->width) {
6186 case 1: {
6187 u8 tmp8 = 0;
6188 pci_read_config_byte(pdev, bits->reg, &tmp8);
6189 tmp = tmp8;
6190 break;
6191 }
6192 case 2: {
6193 u16 tmp16 = 0;
6194 pci_read_config_word(pdev, bits->reg, &tmp16);
6195 tmp = tmp16;
6196 break;
6197 }
6198 case 4: {
6199 u32 tmp32 = 0;
6200 pci_read_config_dword(pdev, bits->reg, &tmp32);
6201 tmp = tmp32;
6202 break;
6203 }
6204
6205 default:
6206 return -EINVAL;
6207 }
6208
6209 tmp &= bits->mask;
6210
6211 return (tmp == bits->val) ? 1 : 0;
6212}
Jens Axboe9b847542006-01-06 09:28:07 +01006213
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006214#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006215void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006216{
6217 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006218 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006219
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006220 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006221 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006222}
6223
Tejun Heo553c4aa2006-12-26 19:39:50 +09006224int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006225{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006226 int rc;
6227
Jens Axboe9b847542006-01-06 09:28:07 +01006228 pci_set_power_state(pdev, PCI_D0);
6229 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006230
Tejun Heob878ca52007-01-20 16:00:28 +09006231 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006232 if (rc) {
6233 dev_printk(KERN_ERR, &pdev->dev,
6234 "failed to enable device after resume (%d)\n", rc);
6235 return rc;
6236 }
6237
Jens Axboe9b847542006-01-06 09:28:07 +01006238 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006239 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006240}
6241
Tejun Heo3c5100c2006-07-26 16:58:33 +09006242int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006243{
Jeff Garzikcca39742006-08-24 03:19:22 -04006244 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006245 int rc = 0;
6246
Jeff Garzikcca39742006-08-24 03:19:22 -04006247 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006248 if (rc)
6249 return rc;
6250
Tejun Heo3c5100c2006-07-26 16:58:33 +09006251 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006252
6253 return 0;
6254}
6255
6256int ata_pci_device_resume(struct pci_dev *pdev)
6257{
Jeff Garzikcca39742006-08-24 03:19:22 -04006258 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006259 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006260
Tejun Heo553c4aa2006-12-26 19:39:50 +09006261 rc = ata_pci_device_do_resume(pdev);
6262 if (rc == 0)
6263 ata_host_resume(host);
6264 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006265}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006266#endif /* CONFIG_PM */
6267
Linus Torvalds1da177e2005-04-16 15:20:36 -07006268#endif /* CONFIG_PCI */
6269
Tejun Heo33267322008-02-13 09:15:09 +09006270static int __init ata_parse_force_one(char **cur,
6271 struct ata_force_ent *force_ent,
6272 const char **reason)
6273{
6274 /* FIXME: Currently, there's no way to tag init const data and
6275 * using __initdata causes build failure on some versions of
6276 * gcc. Once __initdataconst is implemented, add const to the
6277 * following structure.
6278 */
6279 static struct ata_force_param force_tbl[] __initdata = {
6280 { "40c", .cbl = ATA_CBL_PATA40 },
6281 { "80c", .cbl = ATA_CBL_PATA80 },
6282 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6283 { "unk", .cbl = ATA_CBL_PATA_UNK },
6284 { "ign", .cbl = ATA_CBL_PATA_IGN },
6285 { "sata", .cbl = ATA_CBL_SATA },
6286 { "1.5Gbps", .spd_limit = 1 },
6287 { "3.0Gbps", .spd_limit = 2 },
6288 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6289 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
Tejun Heo43c9c592010-05-23 12:59:11 +02006290 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
Tejun Heo33267322008-02-13 09:15:09 +09006291 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6292 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6293 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6294 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6295 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6296 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6297 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6298 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6299 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6300 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6301 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6302 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6303 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6304 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6305 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6306 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6307 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6308 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6309 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6310 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6311 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6312 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6313 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6314 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6315 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6316 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6317 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6318 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6319 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6320 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6321 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6322 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6323 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6324 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006325 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6326 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6327 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Tejun Heo33267322008-02-13 09:15:09 +09006328 };
6329 char *start = *cur, *p = *cur;
6330 char *id, *val, *endp;
6331 const struct ata_force_param *match_fp = NULL;
6332 int nr_matches = 0, i;
6333
6334 /* find where this param ends and update *cur */
6335 while (*p != '\0' && *p != ',')
6336 p++;
6337
6338 if (*p == '\0')
6339 *cur = p;
6340 else
6341 *cur = p + 1;
6342
6343 *p = '\0';
6344
6345 /* parse */
6346 p = strchr(start, ':');
6347 if (!p) {
6348 val = strstrip(start);
6349 goto parse_val;
6350 }
6351 *p = '\0';
6352
6353 id = strstrip(start);
6354 val = strstrip(p + 1);
6355
6356 /* parse id */
6357 p = strchr(id, '.');
6358 if (p) {
6359 *p++ = '\0';
6360 force_ent->device = simple_strtoul(p, &endp, 10);
6361 if (p == endp || *endp != '\0') {
6362 *reason = "invalid device";
6363 return -EINVAL;
6364 }
6365 }
6366
6367 force_ent->port = simple_strtoul(id, &endp, 10);
6368 if (p == endp || *endp != '\0') {
6369 *reason = "invalid port/link";
6370 return -EINVAL;
6371 }
6372
6373 parse_val:
6374 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6375 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6376 const struct ata_force_param *fp = &force_tbl[i];
6377
6378 if (strncasecmp(val, fp->name, strlen(val)))
6379 continue;
6380
6381 nr_matches++;
6382 match_fp = fp;
6383
6384 if (strcasecmp(val, fp->name) == 0) {
6385 nr_matches = 1;
6386 break;
6387 }
6388 }
6389
6390 if (!nr_matches) {
6391 *reason = "unknown value";
6392 return -EINVAL;
6393 }
6394 if (nr_matches > 1) {
6395 *reason = "ambigious value";
6396 return -EINVAL;
6397 }
6398
6399 force_ent->param = *match_fp;
6400
6401 return 0;
6402}
6403
6404static void __init ata_parse_force_param(void)
6405{
6406 int idx = 0, size = 1;
6407 int last_port = -1, last_device = -1;
6408 char *p, *cur, *next;
6409
6410 /* calculate maximum number of params and allocate force_tbl */
6411 for (p = ata_force_param_buf; *p; p++)
6412 if (*p == ',')
6413 size++;
6414
6415 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6416 if (!ata_force_tbl) {
6417 printk(KERN_WARNING "ata: failed to extend force table, "
6418 "libata.force ignored\n");
6419 return;
6420 }
6421
6422 /* parse and populate the table */
6423 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6424 const char *reason = "";
6425 struct ata_force_ent te = { .port = -1, .device = -1 };
6426
6427 next = cur;
6428 if (ata_parse_force_one(&next, &te, &reason)) {
6429 printk(KERN_WARNING "ata: failed to parse force "
6430 "parameter \"%s\" (%s)\n",
6431 cur, reason);
6432 continue;
6433 }
6434
6435 if (te.port == -1) {
6436 te.port = last_port;
6437 te.device = last_device;
6438 }
6439
6440 ata_force_tbl[idx++] = te;
6441
6442 last_port = te.port;
6443 last_device = te.device;
6444 }
6445
6446 ata_force_tbl_size = idx;
6447}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006448
Linus Torvalds1da177e2005-04-16 15:20:36 -07006449static int __init ata_init(void)
6450{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006451 int rc;
Tejun Heo270390e2010-05-10 21:41:35 +02006452
Tejun Heo33267322008-02-13 09:15:09 +09006453 ata_parse_force_param();
6454
Tejun Heo270390e2010-05-10 21:41:35 +02006455 rc = ata_sff_init();
Tejun Heoad72cf92010-07-02 10:03:52 +02006456 if (rc) {
6457 kfree(ata_force_tbl);
6458 return rc;
6459 }
Tejun Heo453b07a2006-05-31 18:27:42 +09006460
Gwendal Grignoud9027472010-05-25 12:31:38 -07006461 libata_transport_init();
6462 ata_scsi_transport_template = ata_attach_transport();
6463 if (!ata_scsi_transport_template) {
6464 ata_sff_exit();
6465 rc = -ENOMEM;
6466 goto err_out;
6467 }
6468
Linus Torvalds1da177e2005-04-16 15:20:36 -07006469 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6470 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006471
6472err_out:
6473 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006474}
6475
6476static void __exit ata_exit(void)
6477{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006478 ata_release_transport(ata_scsi_transport_template);
6479 libata_transport_exit();
Tejun Heo270390e2010-05-10 21:41:35 +02006480 ata_sff_exit();
Tejun Heo33267322008-02-13 09:15:09 +09006481 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006482}
6483
Brian Kinga4625082006-11-13 16:32:36 -06006484subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006485module_exit(ata_exit);
6486
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006487static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
Jeff Garzik67846b32005-10-05 02:58:32 -04006488
6489int ata_ratelimit(void)
6490{
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006491 return __ratelimit(&ratelimit);
Jeff Garzik67846b32005-10-05 02:58:32 -04006492}
6493
Tejun Heoc0c362b2010-09-06 17:57:14 +02006494/**
6495 * ata_msleep - ATA EH owner aware msleep
6496 * @ap: ATA port to attribute the sleep to
6497 * @msecs: duration to sleep in milliseconds
6498 *
6499 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6500 * ownership is released before going to sleep and reacquired
6501 * after the sleep is complete. IOW, other ports sharing the
6502 * @ap->host will be allowed to own the EH while this task is
6503 * sleeping.
6504 *
6505 * LOCKING:
6506 * Might sleep.
6507 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006508void ata_msleep(struct ata_port *ap, unsigned int msecs)
6509{
Tejun Heoc0c362b2010-09-06 17:57:14 +02006510 bool owns_eh = ap && ap->host->eh_owner == current;
6511
6512 if (owns_eh)
6513 ata_eh_release(ap);
6514
Tejun Heo97750ce2010-09-06 17:56:29 +02006515 msleep(msecs);
Tejun Heoc0c362b2010-09-06 17:57:14 +02006516
6517 if (owns_eh)
6518 ata_eh_acquire(ap);
Tejun Heo97750ce2010-09-06 17:56:29 +02006519}
6520
Tejun Heoc22daff2006-04-11 22:22:29 +09006521/**
6522 * ata_wait_register - wait until register value changes
Tejun Heo97750ce2010-09-06 17:56:29 +02006523 * @ap: ATA port to wait register for, can be NULL
Tejun Heoc22daff2006-04-11 22:22:29 +09006524 * @reg: IO-mapped register
6525 * @mask: Mask to apply to read register value
6526 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006527 * @interval: polling interval in milliseconds
6528 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006529 *
6530 * Waiting for some bits of register to change is a common
6531 * operation for ATA controllers. This function reads 32bit LE
6532 * IO-mapped register @reg and tests for the following condition.
6533 *
6534 * (*@reg & mask) != val
6535 *
6536 * If the condition is met, it returns; otherwise, the process is
6537 * repeated after @interval_msec until timeout.
6538 *
6539 * LOCKING:
6540 * Kernel thread context (may sleep)
6541 *
6542 * RETURNS:
6543 * The final register value.
6544 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006545u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006546 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006547{
Tejun Heo341c2c92008-05-20 02:17:51 +09006548 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006549 u32 tmp;
6550
6551 tmp = ioread32(reg);
6552
6553 /* Calculate timeout _after_ the first read to make sure
6554 * preceding writes reach the controller before starting to
6555 * eat away the timeout.
6556 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006557 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006558
Tejun Heo341c2c92008-05-20 02:17:51 +09006559 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
Tejun Heo97750ce2010-09-06 17:56:29 +02006560 ata_msleep(ap, interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006561 tmp = ioread32(reg);
6562 }
6563
6564 return tmp;
6565}
6566
Linus Torvalds1da177e2005-04-16 15:20:36 -07006567/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006568 * Dummy port_ops
6569 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006570static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6571{
6572 return AC_ERR_SYSTEM;
6573}
6574
Tejun Heo182d7bb2008-04-07 22:47:21 +09006575static void ata_dummy_error_handler(struct ata_port *ap)
6576{
6577 /* truly dummy */
6578}
6579
Tejun Heo029cfd62008-03-25 12:22:49 +09006580struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006581 .qc_prep = ata_noop_qc_prep,
6582 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006583 .error_handler = ata_dummy_error_handler,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006584};
6585
Tejun Heo21b0ad42007-04-17 23:44:07 +09006586const struct ata_port_info ata_dummy_port_info = {
6587 .port_ops = &ata_dummy_port_ops,
6588};
6589
Tejun Heodd5b06c2006-08-10 16:59:12 +09006590/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006591 * libata is essentially a library of internal helper functions for
6592 * low-level ATA host controller drivers. As such, the API/ABI is
6593 * likely to change as new drivers are added and updated.
6594 * Do not depend on ABI/API stability.
6595 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006596EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6597EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6598EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006599EXPORT_SYMBOL_GPL(ata_base_port_ops);
6600EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006601EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006602EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heo1eca4362008-11-03 20:03:17 +09006603EXPORT_SYMBOL_GPL(ata_link_next);
6604EXPORT_SYMBOL_GPL(ata_dev_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006605EXPORT_SYMBOL_GPL(ata_std_bios_param);
Tejun Heod8d91292010-05-15 20:09:34 +02006606EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
Jeff Garzikcca39742006-08-24 03:19:22 -04006607EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006608EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006609EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006610EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006611EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006612EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006613EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09006614EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006615EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006616EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006617EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006618EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006619EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6620EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006621EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6622EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6623EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6624EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6625EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6626EXPORT_SYMBOL_GPL(ata_mode_string);
6627EXPORT_SYMBOL_GPL(ata_id_xfermask);
Alan04351822007-03-06 02:37:52 -08006628EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006629EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006630EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Alan10305f02007-02-20 18:01:59 +00006631EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006632EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006633EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006634EXPORT_SYMBOL_GPL(sata_link_debounce);
6635EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo1152b262010-09-01 17:50:05 +02006636EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
Tejun Heo0aa11132008-04-07 22:47:18 +09006637EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006638EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006639EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006640EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006641EXPORT_SYMBOL_GPL(ata_dev_classify);
6642EXPORT_SYMBOL_GPL(ata_dev_pair);
Jeff Garzik67846b32005-10-05 02:58:32 -04006643EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heo97750ce2010-09-06 17:56:29 +02006644EXPORT_SYMBOL_GPL(ata_msleep);
Tejun Heoc22daff2006-04-11 22:22:29 +09006645EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006646EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006647EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006648EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006649EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006650EXPORT_SYMBOL_GPL(sata_scr_valid);
6651EXPORT_SYMBOL_GPL(sata_scr_read);
6652EXPORT_SYMBOL_GPL(sata_scr_write);
6653EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006654EXPORT_SYMBOL_GPL(ata_link_online);
6655EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006656#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006657EXPORT_SYMBOL_GPL(ata_host_suspend);
6658EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006659#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006660EXPORT_SYMBOL_GPL(ata_id_string);
6661EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006662EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006663EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6664
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006665EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006666EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006667EXPORT_SYMBOL_GPL(ata_timing_compute);
6668EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006669EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006670
Linus Torvalds1da177e2005-04-16 15:20:36 -07006671#ifdef CONFIG_PCI
6672EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006673EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006674#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006675EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6676EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006677EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6678EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006679#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006680#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006681
Tejun Heob64bbc32007-07-16 14:29:39 +09006682EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6683EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6684EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09006685EXPORT_SYMBOL_GPL(ata_port_desc);
6686#ifdef CONFIG_PCI
6687EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6688#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09006689EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09006690EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006691EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006692EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09006693EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09006694EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6695EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006696EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6697EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04006698EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09006699EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09006700EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006701
6702EXPORT_SYMBOL_GPL(ata_cable_40wire);
6703EXPORT_SYMBOL_GPL(ata_cable_80wire);
6704EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09006705EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006706EXPORT_SYMBOL_GPL(ata_cable_sata);