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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050062#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <scsi/scsi_host.h>
64#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <asm/byteorder.h>
Tejun Heo140b5e52007-12-12 12:21:52 +090066#include <linux/cdrom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68#include "libata.h"
69
Jeff Garzikfda0efc2007-01-31 07:43:15 -050070
Tejun Heod7bb4cc2006-05-31 18:27:46 +090071/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090072const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
73const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
74const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090075
Tejun Heo029cfd62008-03-25 12:22:49 +090076const struct ata_port_operations ata_base_port_ops = {
Tejun Heo0aa11132008-04-07 22:47:18 +090077 .prereset = ata_std_prereset,
Tejun Heo203c75b2008-04-07 22:47:18 +090078 .postreset = ata_std_postreset,
Tejun Heoa1efdab2008-03-25 12:22:50 +090079 .error_handler = ata_std_error_handler,
Tejun Heo029cfd62008-03-25 12:22:49 +090080};
81
82const struct ata_port_operations sata_port_ops = {
83 .inherits = &ata_base_port_ops,
84
85 .qc_defer = ata_std_qc_defer,
Tejun Heo57c9efd2008-04-07 22:47:19 +090086 .hardreset = sata_std_hardreset,
Tejun Heo029cfd62008-03-25 12:22:49 +090087};
88
Tejun Heo3373efd2006-05-15 20:57:53 +090089static unsigned int ata_dev_init_params(struct ata_device *dev,
90 u16 heads, u16 sectors);
91static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
Jeff Garzik218f3d32007-10-25 00:33:27 -040092static unsigned int ata_dev_set_feature(struct ata_device *dev,
93 u8 enable, u8 feature);
Tejun Heo3373efd2006-05-15 20:57:53 +090094static 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 -070098static struct workqueue_struct *ata_wq;
99
Tejun Heo453b07a2006-05-31 18:27:42 +0900100struct workqueue_struct *ata_aux_wq;
101
Tejun Heo33267322008-02-13 09:15:09 +0900102struct ata_force_param {
103 const char *name;
104 unsigned int cbl;
105 int spd_limit;
106 unsigned long xfer_mask;
107 unsigned int horkage_on;
108 unsigned int horkage_off;
Tejun Heo05944bd2008-08-13 20:19:09 +0900109 unsigned int lflags;
Tejun Heo33267322008-02-13 09:15:09 +0900110};
111
112struct ata_force_ent {
113 int port;
114 int device;
115 struct ata_force_param param;
116};
117
118static struct ata_force_ent *ata_force_tbl;
119static int ata_force_tbl_size;
120
121static char ata_force_param_buf[PAGE_SIZE] __initdata;
Tejun Heo7afb4222008-03-09 20:21:53 +0900122/* param_buf is thrown away after initialization, disallow read */
123module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
Tejun Heo33267322008-02-13 09:15:09 +0900124MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
125
Tejun Heo2486fa52008-07-31 07:52:40 +0900126static int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -0400127module_param(atapi_enabled, int, 0444);
128MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
129
Adrian Bunkc5c61bd2008-02-25 02:07:25 +0200130static int atapi_dmadir = 0;
Albert Lee95de7192006-04-04 10:57:18 +0800131module_param(atapi_dmadir, int, 0444);
132MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
133
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900134int atapi_passthru16 = 1;
135module_param(atapi_passthru16, int, 0444);
136MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
137
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500138int libata_fua = 0;
139module_param_named(fua, libata_fua, int, 0444);
140MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
141
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400142static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100143module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
144MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
145
Alan Coxb3a70602007-10-02 12:38:26 -0400146static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
147module_param_named(dma, libata_dma_mask, int, 0444);
148MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
149
Tejun Heo87fbc5a2008-05-20 02:17:54 +0900150static int ata_probe_timeout;
Andrew Mortona8601e52006-06-25 01:36:52 -0700151module_param(ata_probe_timeout, int, 0444);
152MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
153
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400154int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400155module_param_named(noacpi, libata_noacpi, int, 0444);
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400156MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700157
Alan Coxae8d4ee2007-11-04 22:05:49 -0500158int libata_allow_tpm = 0;
159module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
160MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162MODULE_AUTHOR("Jeff Garzik");
163MODULE_DESCRIPTION("Library module for ATA devices");
164MODULE_LICENSE("GPL");
165MODULE_VERSION(DRV_VERSION);
166
Edward Falk0baab862005-06-02 18:17:13 -0400167
Tejun Heo9913ff82009-01-29 20:31:31 +0900168static bool ata_sstatus_online(u32 sstatus)
169{
170 return (sstatus & 0xf) == 0x3;
171}
172
Tejun Heo1eca4362008-11-03 20:03:17 +0900173/**
174 * ata_link_next - link iteration helper
175 * @link: the previous link, NULL to start
176 * @ap: ATA port containing links to iterate
177 * @mode: iteration mode, one of ATA_LITER_*
Tejun Heoaadffb62008-07-31 17:02:41 +0900178 *
Tejun Heo1eca4362008-11-03 20:03:17 +0900179 * LOCKING:
180 * Host lock or EH context.
181 *
182 * RETURNS:
183 * Pointer to the next link.
Tejun Heoaadffb62008-07-31 17:02:41 +0900184 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900185struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
186 enum ata_link_iter_mode mode)
Tejun Heoaadffb62008-07-31 17:02:41 +0900187{
Tejun Heo1eca4362008-11-03 20:03:17 +0900188 BUG_ON(mode != ATA_LITER_EDGE &&
189 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
Tejun Heoaadffb62008-07-31 17:02:41 +0900190
Tejun Heo1eca4362008-11-03 20:03:17 +0900191 /* NULL link indicates start of iteration */
192 if (!link)
193 switch (mode) {
194 case ATA_LITER_EDGE:
195 case ATA_LITER_PMP_FIRST:
196 if (sata_pmp_attached(ap))
197 return ap->pmp_link;
198 /* fall through */
199 case ATA_LITER_HOST_FIRST:
200 return &ap->link;
201 }
202
203 /* we just iterated over the host link, what's next? */
204 if (link == &ap->link)
205 switch (mode) {
206 case ATA_LITER_HOST_FIRST:
207 if (sata_pmp_attached(ap))
208 return ap->pmp_link;
209 /* fall through */
210 case ATA_LITER_PMP_FIRST:
211 if (unlikely(ap->slave_link))
Tejun Heob1c72912008-07-31 17:02:43 +0900212 return ap->slave_link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900213 /* fall through */
214 case ATA_LITER_EDGE:
Tejun Heoaadffb62008-07-31 17:02:41 +0900215 return NULL;
Tejun Heob1c72912008-07-31 17:02:43 +0900216 }
Tejun Heoaadffb62008-07-31 17:02:41 +0900217
Tejun Heob1c72912008-07-31 17:02:43 +0900218 /* slave_link excludes PMP */
219 if (unlikely(link == ap->slave_link))
220 return NULL;
221
Tejun Heo1eca4362008-11-03 20:03:17 +0900222 /* we were over a PMP link */
Tejun Heoaadffb62008-07-31 17:02:41 +0900223 if (++link < ap->pmp_link + ap->nr_pmp_links)
224 return link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900225
226 if (mode == ATA_LITER_PMP_FIRST)
227 return &ap->link;
228
Tejun Heoaadffb62008-07-31 17:02:41 +0900229 return NULL;
230}
231
Edward Falk0baab862005-06-02 18:17:13 -0400232/**
Tejun Heo1eca4362008-11-03 20:03:17 +0900233 * ata_dev_next - device iteration helper
234 * @dev: the previous device, NULL to start
235 * @link: ATA link containing devices to iterate
236 * @mode: iteration mode, one of ATA_DITER_*
237 *
238 * LOCKING:
239 * Host lock or EH context.
240 *
241 * RETURNS:
242 * Pointer to the next device.
243 */
244struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
245 enum ata_dev_iter_mode mode)
246{
247 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
248 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
249
250 /* NULL dev indicates start of iteration */
251 if (!dev)
252 switch (mode) {
253 case ATA_DITER_ENABLED:
254 case ATA_DITER_ALL:
255 dev = link->device;
256 goto check;
257 case ATA_DITER_ENABLED_REVERSE:
258 case ATA_DITER_ALL_REVERSE:
259 dev = link->device + ata_link_max_devices(link) - 1;
260 goto check;
261 }
262
263 next:
264 /* move to the next one */
265 switch (mode) {
266 case ATA_DITER_ENABLED:
267 case ATA_DITER_ALL:
268 if (++dev < link->device + ata_link_max_devices(link))
269 goto check;
270 return NULL;
271 case ATA_DITER_ENABLED_REVERSE:
272 case ATA_DITER_ALL_REVERSE:
273 if (--dev >= link->device)
274 goto check;
275 return NULL;
276 }
277
278 check:
279 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
280 !ata_dev_enabled(dev))
281 goto next;
282 return dev;
283}
284
285/**
Tejun Heob1c72912008-07-31 17:02:43 +0900286 * ata_dev_phys_link - find physical link for a device
287 * @dev: ATA device to look up physical link for
288 *
289 * Look up physical link which @dev is attached to. Note that
290 * this is different from @dev->link only when @dev is on slave
291 * link. For all other cases, it's the same as @dev->link.
292 *
293 * LOCKING:
294 * Don't care.
295 *
296 * RETURNS:
297 * Pointer to the found physical link.
298 */
299struct ata_link *ata_dev_phys_link(struct ata_device *dev)
300{
301 struct ata_port *ap = dev->link->ap;
302
303 if (!ap->slave_link)
304 return dev->link;
305 if (!dev->devno)
306 return &ap->link;
307 return ap->slave_link;
308}
309
310/**
Tejun Heo33267322008-02-13 09:15:09 +0900311 * ata_force_cbl - force cable type according to libata.force
Randy Dunlap4cdfa1b2008-02-22 12:21:37 -0800312 * @ap: ATA port of interest
Tejun Heo33267322008-02-13 09:15:09 +0900313 *
314 * Force cable type according to libata.force and whine about it.
315 * The last entry which has matching port number is used, so it
316 * can be specified as part of device force parameters. For
317 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
318 * same effect.
319 *
320 * LOCKING:
321 * EH context.
322 */
323void ata_force_cbl(struct ata_port *ap)
324{
325 int i;
326
327 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
328 const struct ata_force_ent *fe = &ata_force_tbl[i];
329
330 if (fe->port != -1 && fe->port != ap->print_id)
331 continue;
332
333 if (fe->param.cbl == ATA_CBL_NONE)
334 continue;
335
336 ap->cbl = fe->param.cbl;
337 ata_port_printk(ap, KERN_NOTICE,
338 "FORCE: cable set to %s\n", fe->param.name);
339 return;
340 }
341}
342
343/**
Tejun Heo05944bd2008-08-13 20:19:09 +0900344 * ata_force_link_limits - force link limits according to libata.force
Tejun Heo33267322008-02-13 09:15:09 +0900345 * @link: ATA link of interest
346 *
Tejun Heo05944bd2008-08-13 20:19:09 +0900347 * Force link flags and SATA spd limit according to libata.force
348 * and whine about it. When only the port part is specified
349 * (e.g. 1:), the limit applies to all links connected to both
350 * the host link and all fan-out ports connected via PMP. If the
351 * device part is specified as 0 (e.g. 1.00:), it specifies the
352 * first fan-out link not the host link. Device number 15 always
Tejun Heob1c72912008-07-31 17:02:43 +0900353 * points to the host link whether PMP is attached or not. If the
354 * controller has slave link, device number 16 points to it.
Tejun Heo33267322008-02-13 09:15:09 +0900355 *
356 * LOCKING:
357 * EH context.
358 */
Tejun Heo05944bd2008-08-13 20:19:09 +0900359static void ata_force_link_limits(struct ata_link *link)
Tejun Heo33267322008-02-13 09:15:09 +0900360{
Tejun Heo05944bd2008-08-13 20:19:09 +0900361 bool did_spd = false;
Tejun Heob1c72912008-07-31 17:02:43 +0900362 int linkno = link->pmp;
363 int i;
Tejun Heo33267322008-02-13 09:15:09 +0900364
365 if (ata_is_host_link(link))
Tejun Heob1c72912008-07-31 17:02:43 +0900366 linkno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900367
368 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
369 const struct ata_force_ent *fe = &ata_force_tbl[i];
370
371 if (fe->port != -1 && fe->port != link->ap->print_id)
372 continue;
373
374 if (fe->device != -1 && fe->device != linkno)
375 continue;
376
Tejun Heo05944bd2008-08-13 20:19:09 +0900377 /* only honor the first spd limit */
378 if (!did_spd && fe->param.spd_limit) {
379 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
380 ata_link_printk(link, KERN_NOTICE,
381 "FORCE: PHY spd limit set to %s\n",
382 fe->param.name);
383 did_spd = true;
384 }
Tejun Heo33267322008-02-13 09:15:09 +0900385
Tejun Heo05944bd2008-08-13 20:19:09 +0900386 /* let lflags stack */
387 if (fe->param.lflags) {
388 link->flags |= fe->param.lflags;
389 ata_link_printk(link, KERN_NOTICE,
390 "FORCE: link flag 0x%x forced -> 0x%x\n",
391 fe->param.lflags, link->flags);
392 }
Tejun Heo33267322008-02-13 09:15:09 +0900393 }
394}
395
396/**
397 * ata_force_xfermask - force xfermask according to libata.force
398 * @dev: ATA device of interest
399 *
400 * Force xfer_mask according to libata.force and whine about it.
401 * For consistency with link selection, device number 15 selects
402 * the first device connected to the host link.
403 *
404 * LOCKING:
405 * EH context.
406 */
407static void ata_force_xfermask(struct ata_device *dev)
408{
409 int devno = dev->link->pmp + dev->devno;
410 int alt_devno = devno;
411 int i;
412
Tejun Heob1c72912008-07-31 17:02:43 +0900413 /* allow n.15/16 for devices attached to host port */
414 if (ata_is_host_link(dev->link))
415 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900416
417 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
418 const struct ata_force_ent *fe = &ata_force_tbl[i];
419 unsigned long pio_mask, mwdma_mask, udma_mask;
420
421 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
422 continue;
423
424 if (fe->device != -1 && fe->device != devno &&
425 fe->device != alt_devno)
426 continue;
427
428 if (!fe->param.xfer_mask)
429 continue;
430
431 ata_unpack_xfermask(fe->param.xfer_mask,
432 &pio_mask, &mwdma_mask, &udma_mask);
433 if (udma_mask)
434 dev->udma_mask = udma_mask;
435 else if (mwdma_mask) {
436 dev->udma_mask = 0;
437 dev->mwdma_mask = mwdma_mask;
438 } else {
439 dev->udma_mask = 0;
440 dev->mwdma_mask = 0;
441 dev->pio_mask = pio_mask;
442 }
443
444 ata_dev_printk(dev, KERN_NOTICE,
445 "FORCE: xfer_mask set to %s\n", fe->param.name);
446 return;
447 }
448}
449
450/**
451 * ata_force_horkage - force horkage according to libata.force
452 * @dev: ATA device of interest
453 *
454 * Force horkage according to libata.force and whine about it.
455 * For consistency with link selection, device number 15 selects
456 * the first device connected to the host link.
457 *
458 * LOCKING:
459 * EH context.
460 */
461static void ata_force_horkage(struct ata_device *dev)
462{
463 int devno = dev->link->pmp + dev->devno;
464 int alt_devno = devno;
465 int i;
466
Tejun Heob1c72912008-07-31 17:02:43 +0900467 /* allow n.15/16 for devices attached to host port */
468 if (ata_is_host_link(dev->link))
469 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900470
471 for (i = 0; i < ata_force_tbl_size; i++) {
472 const struct ata_force_ent *fe = &ata_force_tbl[i];
473
474 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
475 continue;
476
477 if (fe->device != -1 && fe->device != devno &&
478 fe->device != alt_devno)
479 continue;
480
481 if (!(~dev->horkage & fe->param.horkage_on) &&
482 !(dev->horkage & fe->param.horkage_off))
483 continue;
484
485 dev->horkage |= fe->param.horkage_on;
486 dev->horkage &= ~fe->param.horkage_off;
487
488 ata_dev_printk(dev, KERN_NOTICE,
489 "FORCE: horkage modified (%s)\n", fe->param.name);
490 }
491}
492
493/**
Tejun Heo436d34b2008-04-02 17:28:46 +0900494 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
495 * @opcode: SCSI opcode
496 *
497 * Determine ATAPI command type from @opcode.
498 *
499 * LOCKING:
500 * None.
501 *
502 * RETURNS:
503 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
504 */
505int atapi_cmd_type(u8 opcode)
506{
507 switch (opcode) {
508 case GPCMD_READ_10:
509 case GPCMD_READ_12:
510 return ATAPI_READ;
511
512 case GPCMD_WRITE_10:
513 case GPCMD_WRITE_12:
514 case GPCMD_WRITE_AND_VERIFY_10:
515 return ATAPI_WRITE;
516
517 case GPCMD_READ_CD:
518 case GPCMD_READ_CD_MSF:
519 return ATAPI_READ_CD;
520
Tejun Heoe52dcc42008-04-02 17:35:19 +0900521 case ATA_16:
522 case ATA_12:
523 if (atapi_passthru16)
524 return ATAPI_PASS_THRU;
525 /* fall thru */
Tejun Heo436d34b2008-04-02 17:28:46 +0900526 default:
527 return ATAPI_MISC;
528 }
529}
530
531/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
533 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900535 * @is_cmd: This FIS is for command
536 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 *
538 * Converts a standard ATA taskfile to a Serial ATA
539 * FIS structure (Register - Host to Device).
540 *
541 * LOCKING:
542 * Inherited from caller.
543 */
Tejun Heo99771262007-07-16 14:29:38 +0900544void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
Tejun Heo99771262007-07-16 14:29:38 +0900546 fis[0] = 0x27; /* Register - Host to Device FIS */
547 fis[1] = pmp & 0xf; /* Port multiplier number*/
548 if (is_cmd)
549 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 fis[2] = tf->command;
552 fis[3] = tf->feature;
553
554 fis[4] = tf->lbal;
555 fis[5] = tf->lbam;
556 fis[6] = tf->lbah;
557 fis[7] = tf->device;
558
559 fis[8] = tf->hob_lbal;
560 fis[9] = tf->hob_lbam;
561 fis[10] = tf->hob_lbah;
562 fis[11] = tf->hob_feature;
563
564 fis[12] = tf->nsect;
565 fis[13] = tf->hob_nsect;
566 fis[14] = 0;
567 fis[15] = tf->ctl;
568
569 fis[16] = 0;
570 fis[17] = 0;
571 fis[18] = 0;
572 fis[19] = 0;
573}
574
575/**
576 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
577 * @fis: Buffer from which data will be input
578 * @tf: Taskfile to output
579 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500580 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 *
582 * LOCKING:
583 * Inherited from caller.
584 */
585
Jeff Garzik057ace52005-10-22 14:27:05 -0400586void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587{
588 tf->command = fis[2]; /* status */
589 tf->feature = fis[3]; /* error */
590
591 tf->lbal = fis[4];
592 tf->lbam = fis[5];
593 tf->lbah = fis[6];
594 tf->device = fis[7];
595
596 tf->hob_lbal = fis[8];
597 tf->hob_lbam = fis[9];
598 tf->hob_lbah = fis[10];
599
600 tf->nsect = fis[12];
601 tf->hob_nsect = fis[13];
602}
603
Albert Lee8cbd6df2005-10-12 15:06:27 +0800604static const u8 ata_rw_cmds[] = {
605 /* pio multi */
606 ATA_CMD_READ_MULTI,
607 ATA_CMD_WRITE_MULTI,
608 ATA_CMD_READ_MULTI_EXT,
609 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100610 0,
611 0,
612 0,
613 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800614 /* pio */
615 ATA_CMD_PIO_READ,
616 ATA_CMD_PIO_WRITE,
617 ATA_CMD_PIO_READ_EXT,
618 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100619 0,
620 0,
621 0,
622 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800623 /* dma */
624 ATA_CMD_READ,
625 ATA_CMD_WRITE,
626 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100627 ATA_CMD_WRITE_EXT,
628 0,
629 0,
630 0,
631 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800632};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800635 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900636 * @tf: command to examine and configure
637 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500639 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800640 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 *
642 * LOCKING:
643 * caller.
644 */
Tejun Heobd056d72006-11-14 22:47:10 +0900645static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100647 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100649 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500650
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100651 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800652 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
653 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
Albert Lee8cbd6df2005-10-12 15:06:27 +0800655 if (dev->flags & ATA_DFLAG_PIO) {
656 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100657 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900658 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000659 /* Unable to use DMA due to host limitation */
660 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800661 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800662 } else {
663 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100664 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800665 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100667 cmd = ata_rw_cmds[index + fua + lba48 + write];
668 if (cmd) {
669 tf->command = cmd;
670 return 0;
671 }
672 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673}
674
Tejun Heocb95d562006-03-06 04:31:56 +0900675/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900676 * ata_tf_read_block - Read block address from ATA taskfile
677 * @tf: ATA taskfile of interest
678 * @dev: ATA device @tf belongs to
679 *
680 * LOCKING:
681 * None.
682 *
683 * Read block address from @tf. This function can handle all
684 * three address formats - LBA, LBA48 and CHS. tf->protocol and
685 * flags select the address format to use.
686 *
687 * RETURNS:
688 * Block address read from @tf.
689 */
690u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
691{
692 u64 block = 0;
693
694 if (tf->flags & ATA_TFLAG_LBA) {
695 if (tf->flags & ATA_TFLAG_LBA48) {
696 block |= (u64)tf->hob_lbah << 40;
697 block |= (u64)tf->hob_lbam << 32;
Roland Dreier44901a92008-11-04 10:34:48 -0800698 block |= (u64)tf->hob_lbal << 24;
Tejun Heo35b649f2006-11-14 22:37:35 +0900699 } else
700 block |= (tf->device & 0xf) << 24;
701
702 block |= tf->lbah << 16;
703 block |= tf->lbam << 8;
704 block |= tf->lbal;
705 } else {
706 u32 cyl, head, sect;
707
708 cyl = tf->lbam | (tf->lbah << 8);
709 head = tf->device & 0xf;
710 sect = tf->lbal;
711
712 block = (cyl * dev->heads + head) * dev->sectors + sect;
713 }
714
715 return block;
716}
717
718/**
Tejun Heobd056d72006-11-14 22:47:10 +0900719 * ata_build_rw_tf - Build ATA taskfile for given read/write request
720 * @tf: Target ATA taskfile
721 * @dev: ATA device @tf belongs to
722 * @block: Block address
723 * @n_block: Number of blocks
724 * @tf_flags: RW/FUA etc...
725 * @tag: tag
726 *
727 * LOCKING:
728 * None.
729 *
730 * Build ATA taskfile @tf for read/write request described by
731 * @block, @n_block, @tf_flags and @tag on @dev.
732 *
733 * RETURNS:
734 *
735 * 0 on success, -ERANGE if the request is too large for @dev,
736 * -EINVAL if the request is invalid.
737 */
738int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
739 u64 block, u32 n_block, unsigned int tf_flags,
740 unsigned int tag)
741{
742 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
743 tf->flags |= tf_flags;
744
Tejun Heo6d1245b2007-02-20 23:20:27 +0900745 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900746 /* yay, NCQ */
747 if (!lba_48_ok(block, n_block))
748 return -ERANGE;
749
750 tf->protocol = ATA_PROT_NCQ;
751 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
752
753 if (tf->flags & ATA_TFLAG_WRITE)
754 tf->command = ATA_CMD_FPDMA_WRITE;
755 else
756 tf->command = ATA_CMD_FPDMA_READ;
757
758 tf->nsect = tag << 3;
759 tf->hob_feature = (n_block >> 8) & 0xff;
760 tf->feature = n_block & 0xff;
761
762 tf->hob_lbah = (block >> 40) & 0xff;
763 tf->hob_lbam = (block >> 32) & 0xff;
764 tf->hob_lbal = (block >> 24) & 0xff;
765 tf->lbah = (block >> 16) & 0xff;
766 tf->lbam = (block >> 8) & 0xff;
767 tf->lbal = block & 0xff;
768
769 tf->device = 1 << 6;
770 if (tf->flags & ATA_TFLAG_FUA)
771 tf->device |= 1 << 7;
772 } else if (dev->flags & ATA_DFLAG_LBA) {
773 tf->flags |= ATA_TFLAG_LBA;
774
775 if (lba_28_ok(block, n_block)) {
776 /* use LBA28 */
777 tf->device |= (block >> 24) & 0xf;
778 } else if (lba_48_ok(block, n_block)) {
779 if (!(dev->flags & ATA_DFLAG_LBA48))
780 return -ERANGE;
781
782 /* use LBA48 */
783 tf->flags |= ATA_TFLAG_LBA48;
784
785 tf->hob_nsect = (n_block >> 8) & 0xff;
786
787 tf->hob_lbah = (block >> 40) & 0xff;
788 tf->hob_lbam = (block >> 32) & 0xff;
789 tf->hob_lbal = (block >> 24) & 0xff;
790 } else
791 /* request too large even for LBA48 */
792 return -ERANGE;
793
794 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
795 return -EINVAL;
796
797 tf->nsect = n_block & 0xff;
798
799 tf->lbah = (block >> 16) & 0xff;
800 tf->lbam = (block >> 8) & 0xff;
801 tf->lbal = block & 0xff;
802
803 tf->device |= ATA_LBA;
804 } else {
805 /* CHS */
806 u32 sect, head, cyl, track;
807
808 /* The request -may- be too large for CHS addressing. */
809 if (!lba_28_ok(block, n_block))
810 return -ERANGE;
811
812 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
813 return -EINVAL;
814
815 /* Convert LBA to CHS */
816 track = (u32)block / dev->sectors;
817 cyl = track / dev->heads;
818 head = track % dev->heads;
819 sect = (u32)block % dev->sectors + 1;
820
821 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
822 (u32)block, track, cyl, head, sect);
823
824 /* Check whether the converted CHS can fit.
825 Cylinder: 0-65535
826 Head: 0-15
827 Sector: 1-255*/
828 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
829 return -ERANGE;
830
831 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
832 tf->lbal = sect;
833 tf->lbam = cyl;
834 tf->lbah = cyl >> 8;
835 tf->device |= head;
836 }
837
838 return 0;
839}
840
841/**
Tejun Heocb95d562006-03-06 04:31:56 +0900842 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
843 * @pio_mask: pio_mask
844 * @mwdma_mask: mwdma_mask
845 * @udma_mask: udma_mask
846 *
847 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
848 * unsigned int xfer_mask.
849 *
850 * LOCKING:
851 * None.
852 *
853 * RETURNS:
854 * Packed xfer_mask.
855 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900856unsigned long ata_pack_xfermask(unsigned long pio_mask,
857 unsigned long mwdma_mask,
858 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900859{
860 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
861 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
862 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
863}
864
Tejun Heoc0489e42006-03-24 14:07:49 +0900865/**
866 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
867 * @xfer_mask: xfer_mask to unpack
868 * @pio_mask: resulting pio_mask
869 * @mwdma_mask: resulting mwdma_mask
870 * @udma_mask: resulting udma_mask
871 *
872 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
873 * Any NULL distination masks will be ignored.
874 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900875void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
876 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900877{
878 if (pio_mask)
879 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
880 if (mwdma_mask)
881 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
882 if (udma_mask)
883 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
884}
885
Tejun Heocb95d562006-03-06 04:31:56 +0900886static const struct ata_xfer_ent {
Tejun Heobe9a50c2006-03-31 22:48:52 +0900887 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900888 u8 base;
889} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900890 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
891 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
892 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900893 { -1, },
894};
895
896/**
897 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
898 * @xfer_mask: xfer_mask of interest
899 *
900 * Return matching XFER_* value for @xfer_mask. Only the highest
901 * bit of @xfer_mask is considered.
902 *
903 * LOCKING:
904 * None.
905 *
906 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900907 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900908 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900909u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900910{
911 int highbit = fls(xfer_mask) - 1;
912 const struct ata_xfer_ent *ent;
913
914 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
915 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
916 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900917 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900918}
919
920/**
921 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
922 * @xfer_mode: XFER_* of interest
923 *
924 * Return matching xfer_mask for @xfer_mode.
925 *
926 * LOCKING:
927 * None.
928 *
929 * RETURNS:
930 * Matching xfer_mask, 0 if no match found.
931 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900932unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900933{
934 const struct ata_xfer_ent *ent;
935
936 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
937 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900938 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
939 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900940 return 0;
941}
942
943/**
944 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
945 * @xfer_mode: XFER_* of interest
946 *
947 * Return matching xfer_shift for @xfer_mode.
948 *
949 * LOCKING:
950 * None.
951 *
952 * RETURNS:
953 * Matching xfer_shift, -1 if no match found.
954 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900955int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900956{
957 const struct ata_xfer_ent *ent;
958
959 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
960 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
961 return ent->shift;
962 return -1;
963}
964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900966 * ata_mode_string - convert xfer_mask to string
967 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 *
969 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900970 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 *
972 * LOCKING:
973 * None.
974 *
975 * RETURNS:
976 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900977 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900979const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980{
Tejun Heo75f554b2006-03-06 04:31:57 +0900981 static const char * const xfer_mode_str[] = {
982 "PIO0",
983 "PIO1",
984 "PIO2",
985 "PIO3",
986 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100987 "PIO5",
988 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900989 "MWDMA0",
990 "MWDMA1",
991 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100992 "MWDMA3",
993 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +0900994 "UDMA/16",
995 "UDMA/25",
996 "UDMA/33",
997 "UDMA/44",
998 "UDMA/66",
999 "UDMA/100",
1000 "UDMA/133",
1001 "UDMA7",
1002 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001003 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001005 highbit = fls(xfer_mask) - 1;
1006 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1007 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009}
1010
Tejun Heo4c360c82006-04-01 01:38:17 +09001011static const char *sata_spd_string(unsigned int spd)
1012{
1013 static const char * const spd_str[] = {
1014 "1.5 Gbps",
1015 "3.0 Gbps",
Shane Huang8522ee22008-12-30 11:00:37 +08001016 "6.0 Gbps",
Tejun Heo4c360c82006-04-01 01:38:17 +09001017 };
1018
1019 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1020 return "<unknown>";
1021 return spd_str[spd - 1];
1022}
1023
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001024static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
1025{
1026 struct ata_link *link = dev->link;
1027 struct ata_port *ap = link->ap;
1028 u32 scontrol;
1029 unsigned int err_mask;
1030 int rc;
1031
1032 /*
1033 * disallow DIPM for drivers which haven't set
1034 * ATA_FLAG_IPM. This is because when DIPM is enabled,
1035 * phy ready will be set in the interrupt status on
1036 * state changes, which will cause some drivers to
1037 * think there are errors - additionally drivers will
1038 * need to disable hot plug.
1039 */
1040 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
1041 ap->pm_policy = NOT_AVAILABLE;
1042 return -EINVAL;
1043 }
1044
1045 /*
1046 * For DIPM, we will only enable it for the
1047 * min_power setting.
1048 *
1049 * Why? Because Disks are too stupid to know that
1050 * If the host rejects a request to go to SLUMBER
1051 * they should retry at PARTIAL, and instead it
1052 * just would give up. So, for medium_power to
1053 * work at all, we need to only allow HIPM.
1054 */
1055 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
1056 if (rc)
1057 return rc;
1058
1059 switch (policy) {
1060 case MIN_POWER:
1061 /* no restrictions on IPM transitions */
1062 scontrol &= ~(0x3 << 8);
1063 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1064 if (rc)
1065 return rc;
1066
1067 /* enable DIPM */
1068 if (dev->flags & ATA_DFLAG_DIPM)
1069 err_mask = ata_dev_set_feature(dev,
1070 SETFEATURES_SATA_ENABLE, SATA_DIPM);
1071 break;
1072 case MEDIUM_POWER:
1073 /* allow IPM to PARTIAL */
1074 scontrol &= ~(0x1 << 8);
1075 scontrol |= (0x2 << 8);
1076 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1077 if (rc)
1078 return rc;
1079
Kristen Carlson Accardif5456b62007-11-02 16:37:08 -07001080 /*
1081 * we don't have to disable DIPM since IPM flags
1082 * disallow transitions to SLUMBER, which effectively
1083 * disable DIPM if it does not support PARTIAL
1084 */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001085 break;
1086 case NOT_AVAILABLE:
1087 case MAX_PERFORMANCE:
1088 /* disable all IPM transitions */
1089 scontrol |= (0x3 << 8);
1090 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1091 if (rc)
1092 return rc;
1093
Kristen Carlson Accardif5456b62007-11-02 16:37:08 -07001094 /*
1095 * we don't have to disable DIPM since IPM flags
1096 * disallow all transitions which effectively
1097 * disable DIPM anyway.
1098 */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001099 break;
1100 }
1101
1102 /* FIXME: handle SET FEATURES failure */
1103 (void) err_mask;
1104
1105 return 0;
1106}
1107
1108/**
1109 * ata_dev_enable_pm - enable SATA interface power management
Stephen Hemminger48166fd2007-10-31 10:00:27 -07001110 * @dev: device to enable power management
1111 * @policy: the link power management policy
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001112 *
1113 * Enable SATA Interface power management. This will enable
1114 * Device Interface Power Management (DIPM) for min_power
1115 * policy, and then call driver specific callbacks for
1116 * enabling Host Initiated Power management.
1117 *
1118 * Locking: Caller.
1119 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1120 */
1121void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
1122{
1123 int rc = 0;
1124 struct ata_port *ap = dev->link->ap;
1125
1126 /* set HIPM first, then DIPM */
1127 if (ap->ops->enable_pm)
1128 rc = ap->ops->enable_pm(ap, policy);
1129 if (rc)
1130 goto enable_pm_out;
1131 rc = ata_dev_set_dipm(dev, policy);
1132
1133enable_pm_out:
1134 if (rc)
1135 ap->pm_policy = MAX_PERFORMANCE;
1136 else
1137 ap->pm_policy = policy;
1138 return /* rc */; /* hopefully we can use 'rc' eventually */
1139}
1140
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001141#ifdef CONFIG_PM
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001142/**
1143 * ata_dev_disable_pm - disable SATA interface power management
Stephen Hemminger48166fd2007-10-31 10:00:27 -07001144 * @dev: device to disable power management
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001145 *
1146 * Disable SATA Interface power management. This will disable
1147 * Device Interface Power Management (DIPM) without changing
1148 * policy, call driver specific callbacks for disabling Host
1149 * Initiated Power management.
1150 *
1151 * Locking: Caller.
1152 * Returns: void
1153 */
1154static void ata_dev_disable_pm(struct ata_device *dev)
1155{
1156 struct ata_port *ap = dev->link->ap;
1157
1158 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
1159 if (ap->ops->disable_pm)
1160 ap->ops->disable_pm(ap);
1161}
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001162#endif /* CONFIG_PM */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001163
1164void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
1165{
1166 ap->pm_policy = policy;
Tejun Heo3ec25eb2008-03-27 18:37:14 +09001167 ap->link.eh_info.action |= ATA_EH_LPM;
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001168 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
1169 ata_port_schedule_eh(ap);
1170}
1171
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001172#ifdef CONFIG_PM
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001173static void ata_lpm_enable(struct ata_host *host)
1174{
1175 struct ata_link *link;
1176 struct ata_port *ap;
1177 struct ata_device *dev;
1178 int i;
1179
1180 for (i = 0; i < host->n_ports; i++) {
1181 ap = host->ports[i];
Tejun Heo1eca4362008-11-03 20:03:17 +09001182 ata_for_each_link(link, ap, EDGE) {
1183 ata_for_each_dev(dev, link, ALL)
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001184 ata_dev_disable_pm(dev);
1185 }
1186 }
1187}
1188
1189static void ata_lpm_disable(struct ata_host *host)
1190{
1191 int i;
1192
1193 for (i = 0; i < host->n_ports; i++) {
1194 struct ata_port *ap = host->ports[i];
1195 ata_lpm_schedule(ap, ap->pm_policy);
1196 }
1197}
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001198#endif /* CONFIG_PM */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001199
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200/**
1201 * ata_dev_classify - determine device type based on ATA-spec signature
1202 * @tf: ATA taskfile register set for device to be identified
1203 *
1204 * Determine from taskfile register contents whether a device is
1205 * ATA or ATAPI, as per "Signature and persistence" section
1206 * of ATA/PI spec (volume 1, sect 5.14).
1207 *
1208 * LOCKING:
1209 * None.
1210 *
1211 * RETURNS:
Tejun Heo633273a32007-09-23 13:19:54 +09001212 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1213 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 */
Jeff Garzik057ace52005-10-22 14:27:05 -04001215unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216{
1217 /* Apple's open source Darwin code hints that some devices only
1218 * put a proper signature into the LBA mid/high registers,
1219 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a32007-09-23 13:19:54 +09001220 *
1221 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1222 * signatures for ATA and ATAPI devices attached on SerialATA,
1223 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1224 * spec has never mentioned about using different signatures
1225 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1226 * Multiplier specification began to use 0x69/0x96 to identify
1227 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1228 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1229 * 0x69/0x96 shortly and described them as reserved for
1230 * SerialATA.
1231 *
1232 * We follow the current spec and consider that 0x69/0x96
1233 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Tejun Heo79b42ba2009-04-15 06:21:10 +09001234 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1235 * SEMB signature. This is worked around in
1236 * ata_dev_read_id().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 */
Tejun Heo633273a32007-09-23 13:19:54 +09001238 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 DPRINTK("found ATA device by sig\n");
1240 return ATA_DEV_ATA;
1241 }
1242
Tejun Heo633273a32007-09-23 13:19:54 +09001243 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 DPRINTK("found ATAPI device by sig\n");
1245 return ATA_DEV_ATAPI;
1246 }
1247
Tejun Heo633273a32007-09-23 13:19:54 +09001248 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1249 DPRINTK("found PMP device by sig\n");
1250 return ATA_DEV_PMP;
1251 }
1252
1253 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001254 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1255 return ATA_DEV_SEMB;
Tejun Heo633273a32007-09-23 13:19:54 +09001256 }
1257
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 DPRINTK("unknown device\n");
1259 return ATA_DEV_UNKNOWN;
1260}
1261
1262/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001263 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 * @id: IDENTIFY DEVICE results we will examine
1265 * @s: string into which data is output
1266 * @ofs: offset into identify device page
1267 * @len: length of string to return. must be an even number.
1268 *
1269 * The strings in the IDENTIFY DEVICE page are broken up into
1270 * 16-bit chunks. Run through the string, and output each
1271 * 8-bit chunk linearly, regardless of platform.
1272 *
1273 * LOCKING:
1274 * caller.
1275 */
1276
Tejun Heo6a62a042006-02-13 10:02:46 +09001277void ata_id_string(const u16 *id, unsigned char *s,
1278 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279{
1280 unsigned int c;
1281
Alan Cox963e4972008-07-24 17:16:06 +01001282 BUG_ON(len & 1);
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 while (len > 0) {
1285 c = id[ofs] >> 8;
1286 *s = c;
1287 s++;
1288
1289 c = id[ofs] & 0xff;
1290 *s = c;
1291 s++;
1292
1293 ofs++;
1294 len -= 2;
1295 }
1296}
1297
Tejun Heo0e949ff2006-02-12 22:47:04 +09001298/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001299 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001300 * @id: IDENTIFY DEVICE results we will examine
1301 * @s: string into which data is output
1302 * @ofs: offset into identify device page
1303 * @len: length of string to return. must be an odd number.
1304 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001305 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001306 * trims trailing spaces and terminates the resulting string with
1307 * null. @len must be actual maximum length (even number) + 1.
1308 *
1309 * LOCKING:
1310 * caller.
1311 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001312void ata_id_c_string(const u16 *id, unsigned char *s,
1313 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001314{
1315 unsigned char *p;
1316
Tejun Heo6a62a042006-02-13 10:02:46 +09001317 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001318
1319 p = s + strnlen(s, len - 1);
1320 while (p > s && p[-1] == ' ')
1321 p--;
1322 *p = '\0';
1323}
Edward Falk0baab862005-06-02 18:17:13 -04001324
Tejun Heodb6f8752007-09-03 12:31:58 +09001325static u64 ata_id_n_sectors(const u16 *id)
1326{
1327 if (ata_id_has_lba(id)) {
1328 if (ata_id_has_lba48(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001329 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
Tejun Heodb6f8752007-09-03 12:31:58 +09001330 else
Robert Hancock968e5942009-02-16 20:15:08 -06001331 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
Tejun Heodb6f8752007-09-03 12:31:58 +09001332 } else {
1333 if (ata_id_current_chs_valid(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001334 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1335 id[ATA_ID_CUR_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001336 else
Robert Hancock968e5942009-02-16 20:15:08 -06001337 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1338 id[ATA_ID_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001339 }
1340}
1341
Tejun Heoa5987e02008-03-27 19:14:23 +09001342u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001343{
1344 u64 sectors = 0;
1345
1346 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1347 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
Roland Dreierba14a9c2008-10-28 16:52:20 -07001348 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
Alan Cox1e999732007-04-11 00:23:13 +01001349 sectors |= (tf->lbah & 0xff) << 16;
1350 sectors |= (tf->lbam & 0xff) << 8;
1351 sectors |= (tf->lbal & 0xff);
1352
Tejun Heoa5987e02008-03-27 19:14:23 +09001353 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001354}
1355
Tejun Heoa5987e02008-03-27 19:14:23 +09001356u64 ata_tf_to_lba(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001357{
1358 u64 sectors = 0;
1359
1360 sectors |= (tf->device & 0x0f) << 24;
1361 sectors |= (tf->lbah & 0xff) << 16;
1362 sectors |= (tf->lbam & 0xff) << 8;
1363 sectors |= (tf->lbal & 0xff);
1364
Tejun Heoa5987e02008-03-27 19:14:23 +09001365 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001366}
1367
1368/**
Tejun Heoc728a912007-09-03 12:32:30 +09001369 * ata_read_native_max_address - Read native max address
1370 * @dev: target device
1371 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001372 *
Tejun Heoc728a912007-09-03 12:32:30 +09001373 * Perform an LBA48 or LBA28 native size query upon the device in
1374 * question.
1375 *
1376 * RETURNS:
1377 * 0 on success, -EACCES if command is aborted by the drive.
1378 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001379 */
Tejun Heoc728a912007-09-03 12:32:30 +09001380static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001381{
Tejun Heoc728a912007-09-03 12:32:30 +09001382 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001383 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001384 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001385
1386 ata_tf_init(dev, &tf);
1387
Tejun Heoc728a912007-09-03 12:32:30 +09001388 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001389 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001390
1391 if (lba48) {
1392 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1393 tf.flags |= ATA_TFLAG_LBA48;
1394 } else
1395 tf.command = ATA_CMD_READ_NATIVE_MAX;
1396
Alan Cox1e999732007-04-11 00:23:13 +01001397 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001398 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001399
Tejun Heo2b789102007-10-09 15:05:44 +09001400 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001401 if (err_mask) {
1402 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1403 "max address (err_mask=0x%x)\n", err_mask);
1404 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1405 return -EACCES;
1406 return -EIO;
1407 }
Alan Cox1e999732007-04-11 00:23:13 +01001408
Tejun Heoc728a912007-09-03 12:32:30 +09001409 if (lba48)
Tejun Heoa5987e02008-03-27 19:14:23 +09001410 *max_sectors = ata_tf_to_lba48(&tf) + 1;
Tejun Heoc728a912007-09-03 12:32:30 +09001411 else
Tejun Heoa5987e02008-03-27 19:14:23 +09001412 *max_sectors = ata_tf_to_lba(&tf) + 1;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001413 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001414 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001415 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001416}
1417
1418/**
Tejun Heoc728a912007-09-03 12:32:30 +09001419 * ata_set_max_sectors - Set max sectors
1420 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001421 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001422 *
Tejun Heoc728a912007-09-03 12:32:30 +09001423 * Set max sectors of @dev to @new_sectors.
1424 *
1425 * RETURNS:
1426 * 0 on success, -EACCES if command is aborted or denied (due to
1427 * previous non-volatile SET_MAX) by the drive. -EIO on other
1428 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001429 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001430static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001431{
Tejun Heoc728a912007-09-03 12:32:30 +09001432 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001433 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001434 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001435
1436 new_sectors--;
1437
1438 ata_tf_init(dev, &tf);
1439
Alan Cox1e999732007-04-11 00:23:13 +01001440 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001441
1442 if (lba48) {
1443 tf.command = ATA_CMD_SET_MAX_EXT;
1444 tf.flags |= ATA_TFLAG_LBA48;
1445
1446 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1447 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1448 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001449 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001450 tf.command = ATA_CMD_SET_MAX;
1451
Tejun Heo1e582ba2007-09-21 20:07:14 +09001452 tf.device |= (new_sectors >> 24) & 0xf;
1453 }
1454
Alan Cox1e999732007-04-11 00:23:13 +01001455 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001456 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001457
1458 tf.lbal = (new_sectors >> 0) & 0xff;
1459 tf.lbam = (new_sectors >> 8) & 0xff;
1460 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001461
Tejun Heo2b789102007-10-09 15:05:44 +09001462 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001463 if (err_mask) {
1464 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1465 "max address (err_mask=0x%x)\n", err_mask);
1466 if (err_mask == AC_ERR_DEV &&
1467 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1468 return -EACCES;
1469 return -EIO;
1470 }
Alan Cox1e999732007-04-11 00:23:13 +01001471
Tejun Heoc728a912007-09-03 12:32:30 +09001472 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001473}
1474
1475/**
1476 * ata_hpa_resize - Resize a device with an HPA set
1477 * @dev: Device to resize
1478 *
1479 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1480 * it if required to the full size of the media. The caller must check
1481 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001482 *
1483 * RETURNS:
1484 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001485 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001486static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001487{
Tejun Heo05027ad2007-09-03 12:32:57 +09001488 struct ata_eh_context *ehc = &dev->link->eh_context;
1489 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1490 u64 sectors = ata_id_n_sectors(dev->id);
1491 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001492 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001493
Tejun Heo05027ad2007-09-03 12:32:57 +09001494 /* do we need to do it? */
1495 if (dev->class != ATA_DEV_ATA ||
1496 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1497 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001498 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001499
Tejun Heo05027ad2007-09-03 12:32:57 +09001500 /* read native max address */
1501 rc = ata_read_native_max_address(dev, &native_sectors);
1502 if (rc) {
Tejun Heodda7aba2008-03-23 21:05:15 +09001503 /* If device aborted the command or HPA isn't going to
1504 * be unlocked, skip HPA resizing.
Tejun Heo05027ad2007-09-03 12:32:57 +09001505 */
Tejun Heodda7aba2008-03-23 21:05:15 +09001506 if (rc == -EACCES || !ata_ignore_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001507 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
Tejun Heodda7aba2008-03-23 21:05:15 +09001508 "broken, skipping HPA handling\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001509 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001510
Tejun Heo05027ad2007-09-03 12:32:57 +09001511 /* we can continue if device aborted the command */
1512 if (rc == -EACCES)
1513 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001514 }
Tejun Heo37301a52007-06-25 20:45:54 +09001515
Tejun Heo05027ad2007-09-03 12:32:57 +09001516 return rc;
1517 }
1518
1519 /* nothing to do? */
1520 if (native_sectors <= sectors || !ata_ignore_hpa) {
1521 if (!print_info || native_sectors == sectors)
1522 return 0;
1523
1524 if (native_sectors > sectors)
1525 ata_dev_printk(dev, KERN_INFO,
1526 "HPA detected: current %llu, native %llu\n",
1527 (unsigned long long)sectors,
1528 (unsigned long long)native_sectors);
1529 else if (native_sectors < sectors)
1530 ata_dev_printk(dev, KERN_WARNING,
1531 "native sectors (%llu) is smaller than "
1532 "sectors (%llu)\n",
1533 (unsigned long long)native_sectors,
1534 (unsigned long long)sectors);
1535 return 0;
1536 }
1537
1538 /* let's unlock HPA */
1539 rc = ata_set_max_sectors(dev, native_sectors);
1540 if (rc == -EACCES) {
1541 /* if device aborted the command, skip HPA resizing */
1542 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1543 "(%llu -> %llu), skipping HPA handling\n",
1544 (unsigned long long)sectors,
1545 (unsigned long long)native_sectors);
1546 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1547 return 0;
1548 } else if (rc)
1549 return rc;
1550
1551 /* re-read IDENTIFY data */
1552 rc = ata_dev_reread_id(dev, 0);
1553 if (rc) {
1554 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1555 "data after HPA resizing\n");
1556 return rc;
1557 }
1558
1559 if (print_info) {
1560 u64 new_sectors = ata_id_n_sectors(dev->id);
1561 ata_dev_printk(dev, KERN_INFO,
1562 "HPA unlocked: %llu -> %llu, native %llu\n",
1563 (unsigned long long)sectors,
1564 (unsigned long long)new_sectors,
1565 (unsigned long long)native_sectors);
1566 }
1567
1568 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001569}
1570
Edward Falk0baab862005-06-02 18:17:13 -04001571/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001573 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001575 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1576 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 *
1578 * LOCKING:
1579 * caller.
1580 */
1581
Tejun Heo0bd33002006-02-12 22:47:05 +09001582static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583{
1584 DPRINTK("49==0x%04x "
1585 "53==0x%04x "
1586 "63==0x%04x "
1587 "64==0x%04x "
1588 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001589 id[49],
1590 id[53],
1591 id[63],
1592 id[64],
1593 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594 DPRINTK("80==0x%04x "
1595 "81==0x%04x "
1596 "82==0x%04x "
1597 "83==0x%04x "
1598 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001599 id[80],
1600 id[81],
1601 id[82],
1602 id[83],
1603 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 DPRINTK("88==0x%04x "
1605 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001606 id[88],
1607 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608}
1609
Tejun Heocb95d562006-03-06 04:31:56 +09001610/**
1611 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1612 * @id: IDENTIFY data to compute xfer mask from
1613 *
1614 * Compute the xfermask for this device. This is not as trivial
1615 * as it seems if we must consider early devices correctly.
1616 *
1617 * FIXME: pre IDE drive timing (do we care ?).
1618 *
1619 * LOCKING:
1620 * None.
1621 *
1622 * RETURNS:
1623 * Computed xfermask
1624 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001625unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001626{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001627 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001628
1629 /* Usual case. Word 53 indicates word 64 is valid */
1630 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1631 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1632 pio_mask <<= 3;
1633 pio_mask |= 0x7;
1634 } else {
1635 /* If word 64 isn't valid then Word 51 high byte holds
1636 * the PIO timing number for the maximum. Turn it into
1637 * a mask.
1638 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001639 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001640 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001641 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001642 else
1643 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001644
1645 /* But wait.. there's more. Design your standards by
1646 * committee and you too can get a free iordy field to
1647 * process. However its the speeds not the modes that
1648 * are supported... Note drivers using the timing API
1649 * will get this right anyway
1650 */
1651 }
1652
1653 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001654
Alan Coxb352e572006-08-10 18:52:12 +01001655 if (ata_id_is_cfa(id)) {
1656 /*
1657 * Process compact flash extended modes
1658 */
1659 int pio = id[163] & 0x7;
1660 int dma = (id[163] >> 3) & 7;
1661
1662 if (pio)
1663 pio_mask |= (1 << 5);
1664 if (pio > 1)
1665 pio_mask |= (1 << 6);
1666 if (dma)
1667 mwdma_mask |= (1 << 3);
1668 if (dma > 1)
1669 mwdma_mask |= (1 << 4);
1670 }
1671
Tejun Heofb21f0d2006-03-12 12:34:35 +09001672 udma_mask = 0;
1673 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1674 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001675
1676 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1677}
1678
Tejun Heo86e45b62006-03-05 15:29:09 +09001679/**
Jeff Garzik442eacc2007-12-19 04:25:10 -05001680 * ata_pio_queue_task - Queue port_task
Tejun Heo86e45b62006-03-05 15:29:09 +09001681 * @ap: The ata_port to queue port_task for
David Howells65f27f32006-11-22 14:55:48 +00001682 * @data: data for @fn to use
Tejun Heo341c2c92008-05-20 02:17:51 +09001683 * @delay: delay time in msecs for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +09001684 *
1685 * Schedule @fn(@data) for execution after @delay jiffies using
1686 * port_task. There is one port_task per port and it's the
1687 * user(low level driver)'s responsibility to make sure that only
1688 * one task is active at any given time.
1689 *
1690 * libata core layer takes care of synchronization between
Jeff Garzik442eacc2007-12-19 04:25:10 -05001691 * port_task and EH. ata_pio_queue_task() may be ignored for EH
Tejun Heo86e45b62006-03-05 15:29:09 +09001692 * synchronization.
1693 *
1694 * LOCKING:
1695 * Inherited from caller.
1696 */
Tejun Heo624d5c52008-03-25 22:16:41 +09001697void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
Tejun Heo86e45b62006-03-05 15:29:09 +09001698{
David Howells65f27f32006-11-22 14:55:48 +00001699 ap->port_task_data = data;
Tejun Heo86e45b62006-03-05 15:29:09 +09001700
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001701 /* may fail if ata_port_flush_task() in progress */
Tejun Heo341c2c92008-05-20 02:17:51 +09001702 queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
Tejun Heo86e45b62006-03-05 15:29:09 +09001703}
1704
1705/**
1706 * ata_port_flush_task - Flush port_task
1707 * @ap: The ata_port to flush port_task for
1708 *
1709 * After this function completes, port_task is guranteed not to
1710 * be running or scheduled.
1711 *
1712 * LOCKING:
1713 * Kernel thread context (may sleep)
1714 */
1715void ata_port_flush_task(struct ata_port *ap)
1716{
Tejun Heo86e45b62006-03-05 15:29:09 +09001717 DPRINTK("ENTER\n");
1718
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001719 cancel_rearming_delayed_work(&ap->port_task);
Tejun Heo86e45b62006-03-05 15:29:09 +09001720
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001721 if (ata_msg_ctl(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08001722 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__);
Tejun Heo86e45b62006-03-05 15:29:09 +09001723}
1724
Adrian Bunk7102d232007-01-04 00:09:36 +01001725static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001726{
Tejun Heo77853bf2006-01-23 13:09:36 +09001727 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001728
Tejun Heoa2a7a662005-12-13 14:48:31 +09001729 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001730}
1731
1732/**
Tejun Heo24326972006-11-14 22:47:09 +09001733 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001734 * @dev: Device to which the command is sent
1735 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001736 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001737 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001738 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001739 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001740 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001741 *
1742 * Executes libata internal command with timeout. @tf contains
1743 * command on entry and result on return. Timeout and error
1744 * conditions are reported via return value. No recovery action
1745 * is taken after a command times out. It's caller's duty to
1746 * clean up after timeout.
1747 *
1748 * LOCKING:
1749 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001750 *
1751 * RETURNS:
1752 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001753 */
Tejun Heo24326972006-11-14 22:47:09 +09001754unsigned ata_exec_internal_sg(struct ata_device *dev,
1755 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001756 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001757 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001758{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001759 struct ata_link *link = dev->link;
1760 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001761 u8 command = tf->command;
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001762 int auto_timeout = 0;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001763 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001764 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001765 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001766 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001767 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001768 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001769 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001770 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001771
Jeff Garzikba6a1302006-06-22 23:46:10 -04001772 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001773
Tejun Heoe3180492006-05-15 20:58:09 +09001774 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001775 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001776 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001777 return AC_ERR_SYSTEM;
1778 }
1779
Tejun Heo2ab7db12006-05-15 20:58:02 +09001780 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001781
Tejun Heo2ab7db12006-05-15 20:58:02 +09001782 /* XXX: Tag 0 is used for drivers with legacy EH as some
1783 * drivers choke if any other tag is given. This breaks
1784 * ata_tag_internal() test for those drivers. Don't use new
1785 * EH stuff without converting to it.
1786 */
1787 if (ap->ops->error_handler)
1788 tag = ATA_TAG_INTERNAL;
1789 else
1790 tag = 0;
1791
Tejun Heo8a8bc222008-11-10 14:48:21 +09001792 if (test_and_set_bit(tag, &ap->qc_allocated))
1793 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001794 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001795
1796 qc->tag = tag;
1797 qc->scsicmd = NULL;
1798 qc->ap = ap;
1799 qc->dev = dev;
1800 ata_qc_reinit(qc);
1801
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001802 preempted_tag = link->active_tag;
1803 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001804 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001805 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001806 link->active_tag = ATA_TAG_POISON;
1807 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001808 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001809 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001810
1811 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001812 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001813 if (cdb)
1814 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001815 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001816 qc->dma_dir = dma_dir;
1817 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001818 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001819 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001820
Jens Axboe87260212007-10-16 11:14:12 +02001821 for_each_sg(sgl, sg, n_elem, i)
1822 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001823
Jens Axboe87260212007-10-16 11:14:12 +02001824 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001825 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001826 }
1827
Tejun Heo77853bf2006-01-23 13:09:36 +09001828 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001829 qc->complete_fn = ata_qc_complete_internal;
1830
Tejun Heo8e0e6942006-03-31 20:41:11 +09001831 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001832
Jeff Garzikba6a1302006-06-22 23:46:10 -04001833 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001834
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001835 if (!timeout) {
1836 if (ata_probe_timeout)
1837 timeout = ata_probe_timeout * 1000;
1838 else {
1839 timeout = ata_internal_cmd_timeout(dev, command);
1840 auto_timeout = 1;
1841 }
1842 }
Tejun Heo2b789102007-10-09 15:05:44 +09001843
1844 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001845
Tejun Heod95a7172006-05-15 20:58:14 +09001846 ata_port_flush_task(ap);
1847
1848 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001849 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001850
1851 /* We're racing with irq here. If we lose, the
1852 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001853 * twice. If we win, the port is frozen and will be
1854 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001855 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001856 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001857 qc->err_mask |= AC_ERR_TIMEOUT;
1858
1859 if (ap->ops->error_handler)
1860 ata_port_freeze(ap);
1861 else
1862 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001863
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001864 if (ata_msg_warn(ap))
1865 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001866 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001867 }
1868
Jeff Garzikba6a1302006-06-22 23:46:10 -04001869 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001870 }
1871
Tejun Heod95a7172006-05-15 20:58:14 +09001872 /* do post_internal_cmd */
1873 if (ap->ops->post_internal_cmd)
1874 ap->ops->post_internal_cmd(qc);
1875
Tejun Heoa51d6442007-03-20 15:24:11 +09001876 /* perform minimal error analysis */
1877 if (qc->flags & ATA_QCFLAG_FAILED) {
1878 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1879 qc->err_mask |= AC_ERR_DEV;
1880
1881 if (!qc->err_mask)
1882 qc->err_mask |= AC_ERR_OTHER;
1883
1884 if (qc->err_mask & ~AC_ERR_OTHER)
1885 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001886 }
1887
Tejun Heo15869302006-05-15 20:57:33 +09001888 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001889 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001890
Tejun Heoe61e0672006-05-15 20:57:40 +09001891 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001892 err_mask = qc->err_mask;
1893
1894 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001895 link->active_tag = preempted_tag;
1896 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001897 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001898 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001899
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001900 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1901 * Until those drivers are fixed, we detect the condition
1902 * here, fail the command with AC_ERR_SYSTEM and reenable the
1903 * port.
1904 *
1905 * Note that this doesn't change any behavior as internal
1906 * command failure results in disabling the device in the
1907 * higher layer for LLDDs without new reset/EH callbacks.
1908 *
1909 * Kill the following code as soon as those drivers are fixed.
1910 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001911 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001912 err_mask |= AC_ERR_SYSTEM;
1913 ata_port_probe(ap);
1914 }
1915
Jeff Garzikba6a1302006-06-22 23:46:10 -04001916 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001917
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001918 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1919 ata_internal_cmd_timed_out(dev, command);
1920
Tejun Heo77853bf2006-01-23 13:09:36 +09001921 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001922}
1923
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924/**
Tejun Heo33480a02006-12-12 02:15:31 +09001925 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001926 * @dev: Device to which the command is sent
1927 * @tf: Taskfile registers for the command and the result
1928 * @cdb: CDB for packet command
1929 * @dma_dir: Data tranfer direction of the command
1930 * @buf: Data buffer of the command
1931 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001932 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001933 *
1934 * Wrapper around ata_exec_internal_sg() which takes simple
1935 * buffer instead of sg list.
1936 *
1937 * LOCKING:
1938 * None. Should be called with kernel context, might sleep.
1939 *
1940 * RETURNS:
1941 * Zero on success, AC_ERR_* mask on failure
1942 */
1943unsigned ata_exec_internal(struct ata_device *dev,
1944 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001945 int dma_dir, void *buf, unsigned int buflen,
1946 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001947{
Tejun Heo33480a02006-12-12 02:15:31 +09001948 struct scatterlist *psg = NULL, sg;
1949 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001950
Tejun Heo33480a02006-12-12 02:15:31 +09001951 if (dma_dir != DMA_NONE) {
1952 WARN_ON(!buf);
1953 sg_init_one(&sg, buf, buflen);
1954 psg = &sg;
1955 n_elem++;
1956 }
Tejun Heo24326972006-11-14 22:47:09 +09001957
Tejun Heo2b789102007-10-09 15:05:44 +09001958 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1959 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001960}
1961
1962/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001963 * ata_do_simple_cmd - execute simple internal command
1964 * @dev: Device to which the command is sent
1965 * @cmd: Opcode to execute
1966 *
1967 * Execute a 'simple' command, that only consists of the opcode
1968 * 'cmd' itself, without filling any other registers
1969 *
1970 * LOCKING:
1971 * Kernel thread context (may sleep).
1972 *
1973 * RETURNS:
1974 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001975 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001976unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001977{
1978 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001979
1980 ata_tf_init(dev, &tf);
1981
1982 tf.command = cmd;
1983 tf.flags |= ATA_TFLAG_DEVICE;
1984 tf.protocol = ATA_PROT_NODATA;
1985
Tejun Heo2b789102007-10-09 15:05:44 +09001986 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001987}
1988
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001990 * ata_pio_need_iordy - check if iordy needed
1991 * @adev: ATA device
1992 *
1993 * Check if the current speed of the device requires IORDY. Used
1994 * by various controllers for chip configuration.
1995 */
Jeff Garzika617c092007-05-21 20:14:23 -04001996
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001997unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1998{
Alan Cox432729f2007-03-08 23:22:59 +00001999 /* Controller doesn't support IORDY. Probably a pointless check
2000 as the caller should know this */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002001 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002002 return 0;
David Daney5c18c4d2008-12-10 15:39:12 -08002003 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
2004 if (ata_id_is_cfa(adev->id)
2005 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
2006 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00002007 /* PIO3 and higher it is mandatory */
2008 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002009 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00002010 /* We turn it on when possible */
2011 if (ata_id_has_iordy(adev->id))
2012 return 1;
2013 return 0;
2014}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002015
Alan Cox432729f2007-03-08 23:22:59 +00002016/**
2017 * ata_pio_mask_no_iordy - Return the non IORDY mask
2018 * @adev: ATA device
2019 *
2020 * Compute the highest mode possible if we are not using iordy. Return
2021 * -1 if no iordy mode is available.
2022 */
Jeff Garzika617c092007-05-21 20:14:23 -04002023
Alan Cox432729f2007-03-08 23:22:59 +00002024static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
2025{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002026 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002027 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00002028 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002029 /* Is the speed faster than the drive allows non IORDY ? */
2030 if (pio) {
2031 /* This is cycle times not frequency - watch the logic! */
2032 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00002033 return 3 << ATA_SHIFT_PIO;
2034 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002035 }
2036 }
Alan Cox432729f2007-03-08 23:22:59 +00002037 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00002038}
2039
2040/**
Alan Cox963e4972008-07-24 17:16:06 +01002041 * ata_do_dev_read_id - default ID read method
2042 * @dev: device
2043 * @tf: proposed taskfile
2044 * @id: data buffer
2045 *
2046 * Issue the identify taskfile and hand back the buffer containing
2047 * identify data. For some RAID controllers and for pre ATA devices
2048 * this function is wrapped or replaced by the driver
2049 */
2050unsigned int ata_do_dev_read_id(struct ata_device *dev,
2051 struct ata_taskfile *tf, u16 *id)
2052{
2053 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
2054 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
2055}
2056
2057/**
Tejun Heo49016ac2006-02-21 02:12:11 +09002058 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09002059 * @dev: target device
2060 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09002061 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09002062 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09002063 *
2064 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2065 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002066 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2067 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09002068 *
Alan Cox50a99012007-08-08 14:27:00 +01002069 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002070 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01002071 *
Tejun Heo49016ac2006-02-21 02:12:11 +09002072 * LOCKING:
2073 * Kernel thread context (may sleep)
2074 *
2075 * RETURNS:
2076 * 0 on success, -errno otherwise.
2077 */
Tejun Heoa9beec92006-05-31 18:27:44 +09002078int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09002079 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09002080{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002081 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09002082 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09002083 struct ata_taskfile tf;
2084 unsigned int err_mask = 0;
2085 const char *reason;
Tejun Heo79b42ba2009-04-15 06:21:10 +09002086 bool is_semb = class == ATA_DEV_SEMB;
Tejun Heo54936f82007-05-11 14:35:29 +02002087 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09002088 int rc;
2089
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002090 if (ata_msg_ctl(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002091 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
Tejun Heo49016ac2006-02-21 02:12:11 +09002092
Alan Cox963e4972008-07-24 17:16:06 +01002093retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09002094 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09002095
2096 switch (class) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09002097 case ATA_DEV_SEMB:
2098 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
Tejun Heo49016ac2006-02-21 02:12:11 +09002099 case ATA_DEV_ATA:
2100 tf.command = ATA_CMD_ID_ATA;
2101 break;
2102 case ATA_DEV_ATAPI:
2103 tf.command = ATA_CMD_ID_ATAPI;
2104 break;
2105 default:
2106 rc = -ENODEV;
2107 reason = "unsupported class";
2108 goto err_out;
2109 }
2110
2111 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08002112
2113 /* Some devices choke if TF registers contain garbage. Make
2114 * sure those are properly initialized.
2115 */
2116 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2117
2118 /* Device presence detection is unreliable on some
2119 * controllers. Always poll IDENTIFY if available.
2120 */
2121 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09002122
Alan Cox963e4972008-07-24 17:16:06 +01002123 if (ap->ops->read_id)
2124 err_mask = ap->ops->read_id(dev, &tf, id);
2125 else
2126 err_mask = ata_do_dev_read_id(dev, &tf, id);
2127
Tejun Heo49016ac2006-02-21 02:12:11 +09002128 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09002129 if (err_mask & AC_ERR_NODEV_HINT) {
Tejun Heo1ffc1512008-03-23 15:16:53 +09002130 ata_dev_printk(dev, KERN_DEBUG,
2131 "NODEV after polling detection\n");
Tejun Heo55a8e2c2006-11-10 18:08:10 +09002132 return -ENOENT;
2133 }
2134
Tejun Heo79b42ba2009-04-15 06:21:10 +09002135 if (is_semb) {
2136 ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on "
2137 "device w/ SEMB sig, disabled\n");
2138 /* SEMB is not supported yet */
2139 *p_class = ATA_DEV_SEMB_UNSUP;
2140 return 0;
2141 }
2142
Tejun Heo1ffc1512008-03-23 15:16:53 +09002143 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
2144 /* Device or controller might have reported
2145 * the wrong device class. Give a shot at the
2146 * other IDENTIFY if the current one is
2147 * aborted by the device.
2148 */
2149 if (may_fallback) {
2150 may_fallback = 0;
Tejun Heo54936f82007-05-11 14:35:29 +02002151
Tejun Heo1ffc1512008-03-23 15:16:53 +09002152 if (class == ATA_DEV_ATA)
2153 class = ATA_DEV_ATAPI;
2154 else
2155 class = ATA_DEV_ATA;
2156 goto retry;
2157 }
2158
2159 /* Control reaches here iff the device aborted
2160 * both flavors of IDENTIFYs which happens
2161 * sometimes with phantom devices.
2162 */
2163 ata_dev_printk(dev, KERN_DEBUG,
2164 "both IDENTIFYs aborted, assuming NODEV\n");
2165 return -ENOENT;
Tejun Heo54936f82007-05-11 14:35:29 +02002166 }
2167
Tejun Heo49016ac2006-02-21 02:12:11 +09002168 rc = -EIO;
2169 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09002170 goto err_out;
2171 }
2172
Tejun Heo54936f82007-05-11 14:35:29 +02002173 /* Falling back doesn't make sense if ID data was read
2174 * successfully at least once.
2175 */
2176 may_fallback = 0;
2177
Tejun Heo49016ac2006-02-21 02:12:11 +09002178 swap_buf_le16(id, ATA_ID_WORDS);
2179
Tejun Heo49016ac2006-02-21 02:12:11 +09002180 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07002181 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01002182 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07002183
2184 if (class == ATA_DEV_ATA) {
2185 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
2186 goto err_out;
2187 } else {
2188 if (ata_id_is_ata(id))
2189 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09002190 }
2191
Mark Lord169439c2007-04-17 18:26:07 -04002192 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
2193 tried_spinup = 1;
2194 /*
2195 * Drive powered-up in standby mode, and requires a specific
2196 * SET_FEATURES spin-up subcommand before it will accept
2197 * anything other than the original IDENTIFY command.
2198 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002199 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07002200 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04002201 rc = -EIO;
2202 reason = "SPINUP failed";
2203 goto err_out;
2204 }
2205 /*
2206 * If the drive initially returned incomplete IDENTIFY info,
2207 * we now must reissue the IDENTIFY command.
2208 */
2209 if (id[2] == 0x37c8)
2210 goto retry;
2211 }
2212
Tejun Heobff04642006-11-10 18:08:10 +09002213 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09002214 /*
2215 * The exact sequence expected by certain pre-ATA4 drives is:
2216 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01002217 * IDENTIFY (optional in early ATA)
2218 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09002219 * anything else..
2220 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01002221 *
2222 * Note that ATA4 says lba is mandatory so the second check
2223 * shoud never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09002224 */
2225 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09002226 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09002227 if (err_mask) {
2228 rc = -EIO;
2229 reason = "INIT_DEV_PARAMS failed";
2230 goto err_out;
2231 }
2232
2233 /* current CHS translation info (id[53-58]) might be
2234 * changed. reread the identify device info.
2235 */
Tejun Heobff04642006-11-10 18:08:10 +09002236 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09002237 goto retry;
2238 }
2239 }
2240
2241 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09002242
Tejun Heo49016ac2006-02-21 02:12:11 +09002243 return 0;
2244
2245 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09002246 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002247 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09002248 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002249 return rc;
2250}
2251
Tejun Heo90627122009-01-29 20:31:36 +09002252static int ata_do_link_spd_horkage(struct ata_device *dev)
2253{
2254 struct ata_link *plink = ata_dev_phys_link(dev);
2255 u32 target, target_limit;
2256
2257 if (!sata_scr_valid(plink))
2258 return 0;
2259
2260 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2261 target = 1;
2262 else
2263 return 0;
2264
2265 target_limit = (1 << target) - 1;
2266
2267 /* if already on stricter limit, no need to push further */
2268 if (plink->sata_spd_limit <= target_limit)
2269 return 0;
2270
2271 plink->sata_spd_limit = target_limit;
2272
2273 /* Request another EH round by returning -EAGAIN if link is
2274 * going faster than the target speed. Forward progress is
2275 * guaranteed by setting sata_spd_limit to target_limit above.
2276 */
2277 if (plink->sata_spd > target) {
2278 ata_dev_printk(dev, KERN_INFO,
2279 "applying link speed limit horkage to %s\n",
2280 sata_spd_string(target));
2281 return -EAGAIN;
2282 }
2283 return 0;
2284}
2285
Tejun Heo3373efd2006-05-15 20:57:53 +09002286static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002287{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002288 struct ata_port *ap = dev->link->ap;
Jens Axboe9ce8e302008-08-27 15:23:18 +02002289
2290 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2291 return 0;
2292
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002293 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002294}
2295
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002296static void ata_dev_config_ncq(struct ata_device *dev,
2297 char *desc, size_t desc_sz)
2298{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002299 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002300 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2301
2302 if (!ata_id_has_ncq(dev->id)) {
2303 desc[0] = '\0';
2304 return;
2305 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002306 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002307 snprintf(desc, desc_sz, "NCQ (not used)");
2308 return;
2309 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002310 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002311 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002312 dev->flags |= ATA_DFLAG_NCQ;
2313 }
2314
2315 if (hdepth >= ddepth)
2316 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2317 else
2318 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2319}
2320
Tejun Heo49016ac2006-02-21 02:12:11 +09002321/**
Tejun Heoffeae412006-03-01 16:09:35 +09002322 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002323 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 *
Tejun Heoffeae412006-03-01 16:09:35 +09002325 * Configure @dev according to @dev->id. Generic and low-level
2326 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 *
2328 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002329 * Kernel thread context (may sleep)
2330 *
2331 * RETURNS:
2332 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002334int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002336 struct ata_port *ap = dev->link->ap;
2337 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002338 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002339 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002340 unsigned long xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002341 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002342 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2343 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002344 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002346 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo44877b42007-02-21 01:06:51 +09002347 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002348 __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002349 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350 }
2351
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002352 if (ata_msg_probe(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002353 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354
Tejun Heo75683fe2007-07-05 13:31:27 +09002355 /* set horkage */
2356 dev->horkage |= ata_dev_blacklisted(dev);
Tejun Heo33267322008-02-13 09:15:09 +09002357 ata_force_horkage(dev);
Tejun Heo75683fe2007-07-05 13:31:27 +09002358
Tejun Heo50af2fa2008-05-19 01:15:14 +09002359 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2360 ata_dev_printk(dev, KERN_INFO,
2361 "unsupported device, disabling\n");
2362 ata_dev_disable(dev);
2363 return 0;
2364 }
2365
Tejun Heo2486fa52008-07-31 07:52:40 +09002366 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2367 dev->class == ATA_DEV_ATAPI) {
2368 ata_dev_printk(dev, KERN_WARNING,
2369 "WARNING: ATAPI is %s, device ignored.\n",
2370 atapi_enabled ? "not supported with this driver"
2371 : "disabled");
2372 ata_dev_disable(dev);
2373 return 0;
2374 }
2375
Tejun Heo90627122009-01-29 20:31:36 +09002376 rc = ata_do_link_spd_horkage(dev);
2377 if (rc)
2378 return rc;
2379
Tejun Heo67465442007-05-15 03:28:16 +09002380 /* let ACPI work its magic */
2381 rc = ata_acpi_on_devcfg(dev);
2382 if (rc)
2383 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002384
Tejun Heo05027ad2007-09-03 12:32:57 +09002385 /* massage HPA, do it early as it might change IDENTIFY data */
2386 rc = ata_hpa_resize(dev);
2387 if (rc)
2388 return rc;
2389
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002390 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002391 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002392 ata_dev_printk(dev, KERN_DEBUG,
2393 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2394 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002395 __func__,
Tejun Heof15a1da2006-05-15 20:57:56 +09002396 id[49], id[82], id[83], id[84],
2397 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002398
Tejun Heo208a9932006-03-05 17:55:58 +09002399 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002400 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002401 dev->max_sectors = 0;
2402 dev->cdb_len = 0;
2403 dev->n_sectors = 0;
2404 dev->cylinders = 0;
2405 dev->heads = 0;
2406 dev->sectors = 0;
Mark Lorde18086d2009-03-19 13:32:21 -04002407 dev->multi_count = 0;
Tejun Heo208a9932006-03-05 17:55:58 +09002408
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409 /*
2410 * common ATA, ATAPI feature tests
2411 */
2412
Tejun Heoff8854b2006-03-06 04:31:56 +09002413 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002414 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002416 if (ata_msg_probe(ap))
2417 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418
Albert Leeef143d52007-06-05 13:01:33 +08002419 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2420 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2421 sizeof(fwrevbuf));
2422
2423 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2424 sizeof(modelbuf));
2425
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 /* ATA-specific feature tests */
2427 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002428 if (ata_id_is_cfa(id)) {
2429 if (id[162] & 1) /* CPRM may make this media unusable */
Tejun Heo44877b42007-02-21 01:06:51 +09002430 ata_dev_printk(dev, KERN_WARNING,
2431 "supports DRM functions and may "
2432 "not be fully accessable.\n");
Alan Coxb352e572006-08-10 18:52:12 +01002433 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002434 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002435 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002436 /* Warn the user if the device has TPM extensions */
2437 if (ata_id_has_tpm(id))
2438 ata_dev_printk(dev, KERN_WARNING,
2439 "supports DRM functions and may "
2440 "not be fully accessable.\n");
2441 }
Alan Coxb352e572006-08-10 18:52:12 +01002442
Tejun Heo1148c3a2006-03-13 19:48:04 +09002443 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002444
Mark Lorde18086d2009-03-19 13:32:21 -04002445 /* get current R/W Multiple count setting */
2446 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2447 unsigned int max = dev->id[47] & 0xff;
2448 unsigned int cnt = dev->id[59] & 0xff;
2449 /* only recognize/allow powers of two here */
2450 if (is_power_of_2(max) && is_power_of_2(cnt))
2451 if (cnt <= max)
2452 dev->multi_count = cnt;
2453 }
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002454
Tejun Heo1148c3a2006-03-13 19:48:04 +09002455 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002456 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002457 char ncq_desc[20];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002458
Tejun Heo4c2d7212006-03-05 17:55:58 +09002459 lba_desc = "LBA";
2460 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002461 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002462 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002463 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002464
2465 if (dev->n_sectors >= (1UL << 28) &&
2466 ata_id_has_flush_ext(id))
2467 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002468 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04002469
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002470 /* config NCQ */
2471 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2472
Albert Lee8bf62ece2005-05-12 15:29:42 -04002473 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002474 if (ata_msg_drv(ap) && print_info) {
2475 ata_dev_printk(dev, KERN_INFO,
2476 "%s: %s, %s, max %s\n",
2477 revbuf, modelbuf, fwrevbuf,
2478 ata_mode_string(xfer_mask));
2479 ata_dev_printk(dev, KERN_INFO,
2480 "%Lu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002481 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002482 dev->multi_count, lba_desc, ncq_desc);
2483 }
Tejun Heoffeae412006-03-01 16:09:35 +09002484 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002485 /* CHS */
2486
2487 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002488 dev->cylinders = id[1];
2489 dev->heads = id[3];
2490 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002491
Tejun Heo1148c3a2006-03-13 19:48:04 +09002492 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002493 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002494 dev->cylinders = id[54];
2495 dev->heads = id[55];
2496 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002497 }
2498
2499 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002500 if (ata_msg_drv(ap) && print_info) {
Tejun Heo88574552006-06-25 20:00:35 +09002501 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002502 "%s: %s, %s, max %s\n",
2503 revbuf, modelbuf, fwrevbuf,
2504 ata_mode_string(xfer_mask));
Jeff Garzika84471f2007-02-26 05:51:33 -05002505 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002506 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2507 (unsigned long long)dev->n_sectors,
2508 dev->multi_count, dev->cylinders,
2509 dev->heads, dev->sectors);
2510 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002511 }
2512
Tejun Heo6e7846e2006-02-12 23:32:58 +09002513 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514 }
2515
2516 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002517 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002518 const char *cdb_intr_string = "";
2519 const char *atapi_an_string = "";
Tejun Heo91163002008-02-21 13:25:50 +09002520 const char *dma_dir_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002521 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002522
Tejun Heo1148c3a2006-03-13 19:48:04 +09002523 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002525 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002526 ata_dev_printk(dev, KERN_WARNING,
2527 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002528 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 goto err_out_nosup;
2530 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002531 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532
Tejun Heo7d77b242007-09-23 13:14:13 +09002533 /* Enable ATAPI AN if both the host and device have
2534 * the support. If PMP is attached, SNTF is required
2535 * to enable ATAPI AN to discern between PHY status
2536 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002537 */
Tejun Heo7d77b242007-09-23 13:14:13 +09002538 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
Tejun Heo071f44b2008-04-07 22:47:22 +09002539 (!sata_pmp_attached(ap) ||
Tejun Heo7d77b242007-09-23 13:14:13 +09002540 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002541 unsigned int err_mask;
2542
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002543 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002544 err_mask = ata_dev_set_feature(dev,
2545 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002546 if (err_mask)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002547 ata_dev_printk(dev, KERN_ERR,
Tejun Heo854c73a2007-09-23 13:14:11 +09002548 "failed to enable ATAPI AN "
2549 "(err_mask=0x%x)\n", err_mask);
2550 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002551 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002552 atapi_an_string = ", ATAPI AN";
2553 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002554 }
2555
Albert Lee08a556d2006-03-31 13:29:04 +08002556 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002557 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002558 cdb_intr_string = ", CDB intr";
2559 }
Albert Lee312f7da2005-09-27 17:38:03 +08002560
Tejun Heo91163002008-02-21 13:25:50 +09002561 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2562 dev->flags |= ATA_DFLAG_DMADIR;
2563 dma_dir_string = ", DMADIR";
2564 }
2565
Linus Torvalds1da177e2005-04-16 15:20:36 -07002566 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002567 if (ata_msg_drv(ap) && print_info)
Albert Leeef143d52007-06-05 13:01:33 +08002568 ata_dev_printk(dev, KERN_INFO,
Tejun Heo91163002008-02-21 13:25:50 +09002569 "ATAPI: %s, %s, max %s%s%s%s\n",
Albert Leeef143d52007-06-05 13:01:33 +08002570 modelbuf, fwrevbuf,
Tejun Heo12436c32006-05-15 20:59:15 +09002571 ata_mode_string(xfer_mask),
Tejun Heo91163002008-02-21 13:25:50 +09002572 cdb_intr_string, atapi_an_string,
2573 dma_dir_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002574 }
2575
Tejun Heo914ed352006-11-01 18:39:55 +09002576 /* determine max_sectors */
2577 dev->max_sectors = ATA_MAX_SECTORS;
2578 if (dev->flags & ATA_DFLAG_LBA48)
2579 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2580
Kristen Carlson Accardica773292007-10-25 00:58:59 -04002581 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2582 if (ata_id_has_hipm(dev->id))
2583 dev->flags |= ATA_DFLAG_HIPM;
2584 if (ata_id_has_dipm(dev->id))
2585 dev->flags |= ATA_DFLAG_DIPM;
2586 }
2587
Alan Coxc5038fc2007-10-25 14:21:16 +01002588 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2589 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002590 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002591 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09002592 ata_dev_printk(dev, KERN_INFO,
2593 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002594 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002595 dev->max_sectors = ATA_MAX_SECTORS;
2596 }
2597
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002598 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002599 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002600 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002601 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2602 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002603
Tejun Heo75683fe2007-07-05 13:31:27 +09002604 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002605 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2606 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002607
Kristen Carlson Accardica773292007-10-25 00:58:59 -04002608 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2609 dev->horkage |= ATA_HORKAGE_IPM;
2610
2611 /* reset link pm_policy for this port to no pm */
2612 ap->pm_policy = MAX_PERFORMANCE;
2613 }
2614
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002615 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002616 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002617
Alan Coxc5038fc2007-10-25 14:21:16 +01002618 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2619 /* Let the user know. We don't want to disallow opens for
2620 rescue purposes, or in case the vendor is just a blithering
2621 idiot. Do this after the dev_config call as some controllers
2622 with buggy firmware may want to avoid reporting false device
2623 bugs */
2624
2625 if (print_info) {
2626 ata_dev_printk(dev, KERN_WARNING,
2627"Drive reports diagnostics failure. This may indicate a drive\n");
2628 ata_dev_printk(dev, KERN_WARNING,
2629"fault or invalid emulation. Contact drive vendor for information.\n");
2630 }
2631 }
2632
Tejun Heoac70a962008-11-27 13:36:48 +09002633 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2634 ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
2635 "firmware update to be fully functional.\n");
2636 ata_dev_printk(dev, KERN_WARNING, " contact the vendor "
2637 "or visit http://ata.wiki.kernel.org.\n");
2638 }
2639
Tejun Heoffeae412006-03-01 16:09:35 +09002640 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641
2642err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002643 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002644 ata_dev_printk(dev, KERN_DEBUG,
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002645 "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002646 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002647}
2648
2649/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002650 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002651 * @ap: port
2652 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002653 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002654 * detection.
2655 */
2656
2657int ata_cable_40wire(struct ata_port *ap)
2658{
2659 return ATA_CBL_PATA40;
2660}
2661
2662/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002663 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002664 * @ap: port
2665 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002666 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002667 * detection.
2668 */
2669
2670int ata_cable_80wire(struct ata_port *ap)
2671{
2672 return ATA_CBL_PATA80;
2673}
2674
2675/**
2676 * ata_cable_unknown - return unknown PATA cable.
2677 * @ap: port
2678 *
2679 * Helper method for drivers which have no PATA cable detection.
2680 */
2681
2682int ata_cable_unknown(struct ata_port *ap)
2683{
2684 return ATA_CBL_PATA_UNK;
2685}
2686
2687/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002688 * ata_cable_ignore - return ignored PATA cable.
2689 * @ap: port
2690 *
2691 * Helper method for drivers which don't use cable type to limit
2692 * transfer mode.
2693 */
2694int ata_cable_ignore(struct ata_port *ap)
2695{
2696 return ATA_CBL_PATA_IGN;
2697}
2698
2699/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002700 * ata_cable_sata - return SATA cable type
2701 * @ap: port
2702 *
2703 * Helper method for drivers which have SATA cables
2704 */
2705
2706int ata_cable_sata(struct ata_port *ap)
2707{
2708 return ATA_CBL_SATA;
2709}
2710
2711/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712 * ata_bus_probe - Reset and probe ATA bus
2713 * @ap: Bus to probe
2714 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002715 * Master ATA bus probing function. Initiates a hardware-dependent
2716 * bus reset, then attempts to identify any devices found on
2717 * the bus.
2718 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002720 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 *
2722 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002723 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 */
2725
Brian King80289162006-08-07 14:27:31 -05002726int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002727{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002728 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002729 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002730 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002731 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002732
Tejun Heo28ca5c52006-03-01 16:09:36 +09002733 ata_port_probe(ap);
2734
Tejun Heo1eca4362008-11-03 20:03:17 +09002735 ata_for_each_dev(dev, &ap->link, ALL)
Tejun Heof58229f2007-08-06 18:36:23 +09002736 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002737
2738 retry:
Tejun Heo1eca4362008-11-03 20:03:17 +09002739 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heocdeab112007-10-29 16:41:09 +09002740 /* If we issue an SRST then an ATA drive (not ATAPI)
2741 * may change configuration and be in PIO0 timing. If
2742 * we do a hard reset (or are coming from power on)
2743 * this is true for ATA or ATAPI. Until we've set a
2744 * suitable controller mode we should not touch the
2745 * bus as we may be talking too fast.
2746 */
2747 dev->pio_mode = XFER_PIO_0;
2748
2749 /* If the controller has a pio mode setup function
2750 * then use it to set the chipset to rights. Don't
2751 * touch the DMA setup as that will be dealt with when
2752 * configuring devices.
2753 */
2754 if (ap->ops->set_piomode)
2755 ap->ops->set_piomode(ap, dev);
2756 }
2757
Tejun Heo20444702006-03-13 01:57:01 +09002758 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002759 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002760
Tejun Heo1eca4362008-11-03 20:03:17 +09002761 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo52783c52006-05-31 18:28:22 +09002762 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2763 dev->class != ATA_DEV_UNKNOWN)
2764 classes[dev->devno] = dev->class;
2765 else
2766 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002767
Tejun Heo52783c52006-05-31 18:28:22 +09002768 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002769 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002770
Tejun Heo52783c52006-05-31 18:28:22 +09002771 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09002772
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002773 /* read IDENTIFY page and configure devices. We have to do the identify
2774 specific sequence bass-ackwards so that PDIAG- is released by
2775 the slave device */
2776
Tejun Heo1eca4362008-11-03 20:03:17 +09002777 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
Tejun Heof58229f2007-08-06 18:36:23 +09002778 if (tries[dev->devno])
2779 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002780
Tejun Heoe1211e32006-04-01 01:38:18 +09002781 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002782 continue;
2783
Tejun Heobff04642006-11-10 18:08:10 +09002784 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2785 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002786 if (rc)
2787 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002788 }
2789
Alan Coxbe0d18d2007-03-06 02:37:56 -08002790 /* Now ask for the cable type as PDIAG- should have been released */
2791 if (ap->ops->cable_detect)
2792 ap->cbl = ap->ops->cable_detect(ap);
2793
Tejun Heo1eca4362008-11-03 20:03:17 +09002794 /* We may have SATA bridge glue hiding here irrespective of
2795 * the reported cable types and sensed types. When SATA
2796 * drives indicate we have a bridge, we don't know which end
2797 * of the link the bridge is which is a problem.
2798 */
2799 ata_for_each_dev(dev, &ap->link, ENABLED)
Alan Cox614fe292007-08-22 23:22:45 +01002800 if (ata_id_is_sata(dev->id))
2801 ap->cbl = ATA_CBL_SATA;
Alan Cox614fe292007-08-22 23:22:45 +01002802
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002803 /* After the identify sequence we can now set up the devices. We do
2804 this in the normal order so that the user doesn't get confused */
2805
Tejun Heo1eca4362008-11-03 20:03:17 +09002806 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002807 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002808 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002809 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002810 if (rc)
2811 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812 }
2813
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002814 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002815 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002816 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002817 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818
Tejun Heo1eca4362008-11-03 20:03:17 +09002819 ata_for_each_dev(dev, &ap->link, ENABLED)
2820 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002821
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002822 /* no device present, disable port */
2823 ata_port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09002824 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002825
2826 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002827 tries[dev->devno]--;
2828
Tejun Heo14d2bac2006-04-02 17:54:46 +09002829 switch (rc) {
2830 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002831 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002832 tries[dev->devno] = 0;
2833 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002834
2835 case -ENODEV:
2836 /* give it just one more chance */
2837 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002838 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002839 if (tries[dev->devno] == 1) {
2840 /* This is the last chance, better to slow
2841 * down than lose it.
2842 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002843 sata_down_spd_limit(&ap->link, 0);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002844 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2845 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002846 }
2847
Tejun Heo4ae72a12007-02-02 16:22:30 +09002848 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002849 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002850
Tejun Heo14d2bac2006-04-02 17:54:46 +09002851 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852}
2853
2854/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002855 * ata_port_probe - Mark port as enabled
2856 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002858 * Modify @ap data structure such that the system
2859 * thinks that the entire port is enabled.
2860 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002861 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04002862 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863 */
2864
2865void ata_port_probe(struct ata_port *ap)
2866{
Tejun Heo198e0fe2006-04-02 18:51:52 +09002867 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868}
2869
2870/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002871 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002872 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002873 *
2874 * This function prints link speed and status of a SATA link.
2875 *
2876 * LOCKING:
2877 * None.
2878 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002879static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002880{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002881 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002882
Tejun Heo936fd732007-08-06 18:36:23 +09002883 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002884 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002885 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002886
Tejun Heob1c72912008-07-31 17:02:43 +09002887 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002888 tmp = (sstatus >> 4) & 0xf;
Tejun Heo936fd732007-08-06 18:36:23 +09002889 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002890 "SATA link up %s (SStatus %X SControl %X)\n",
2891 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002892 } else {
Tejun Heo936fd732007-08-06 18:36:23 +09002893 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002894 "SATA link down (SStatus %X SControl %X)\n",
2895 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002896 }
2897}
2898
2899/**
Alan Coxebdfca62006-03-23 15:38:34 +00002900 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002901 * @adev: device
2902 *
2903 * Obtain the other device on the same cable, or if none is
2904 * present NULL is returned
2905 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002906
Tejun Heo3373efd2006-05-15 20:57:53 +09002907struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002908{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002909 struct ata_link *link = adev->link;
2910 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002911 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002912 return NULL;
2913 return pair;
2914}
2915
2916/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002917 * ata_port_disable - Disable port.
2918 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002920 * Modify @ap data structure such that the system
2921 * thinks that the entire port is disabled, and should
2922 * never attempt to probe or communicate with devices
2923 * on this port.
2924 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002925 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04002926 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927 */
2928
2929void ata_port_disable(struct ata_port *ap)
2930{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002931 ap->link.device[0].class = ATA_DEV_NONE;
2932 ap->link.device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09002933 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002934}
2935
Tejun Heo1c3fae42006-04-02 20:53:28 +09002936/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002937 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002938 * @link: Link to adjust SATA spd limit for
Tejun Heoa07d4992009-01-29 20:31:33 +09002939 * @spd_limit: Additional limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09002940 *
Tejun Heo936fd732007-08-06 18:36:23 +09002941 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002942 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002943 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002944 *
Tejun Heoa07d4992009-01-29 20:31:33 +09002945 * If @spd_limit is non-zero, the speed is limited to equal to or
2946 * lower than @spd_limit if such speed is supported. If
2947 * @spd_limit is slower than any supported speed, only the lowest
2948 * supported speed is allowed.
2949 *
Tejun Heo1c3fae42006-04-02 20:53:28 +09002950 * LOCKING:
2951 * Inherited from caller.
2952 *
2953 * RETURNS:
2954 * 0 on success, negative errno on failure
2955 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002956int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002957{
Tejun Heo81952c52006-05-15 20:57:47 +09002958 u32 sstatus, spd, mask;
Tejun Heoa07d4992009-01-29 20:31:33 +09002959 int rc, bit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002960
Tejun Heo936fd732007-08-06 18:36:23 +09002961 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002962 return -EOPNOTSUPP;
2963
2964 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002965 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002966 */
Tejun Heo936fd732007-08-06 18:36:23 +09002967 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo9913ff82009-01-29 20:31:31 +09002968 if (rc == 0 && ata_sstatus_online(sstatus))
Tejun Heo008a7892007-07-16 14:29:40 +09002969 spd = (sstatus >> 4) & 0xf;
2970 else
Tejun Heo936fd732007-08-06 18:36:23 +09002971 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002972
Tejun Heo936fd732007-08-06 18:36:23 +09002973 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002974 if (mask <= 1)
2975 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002976
2977 /* unconditionally mask off the highest bit */
Tejun Heoa07d4992009-01-29 20:31:33 +09002978 bit = fls(mask) - 1;
2979 mask &= ~(1 << bit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002980
Tejun Heo008a7892007-07-16 14:29:40 +09002981 /* Mask off all speeds higher than or equal to the current
2982 * one. Force 1.5Gbps if current SPD is not available.
2983 */
2984 if (spd > 1)
2985 mask &= (1 << (spd - 1)) - 1;
2986 else
2987 mask &= 1;
2988
2989 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002990 if (!mask)
2991 return -EINVAL;
2992
Tejun Heoa07d4992009-01-29 20:31:33 +09002993 if (spd_limit) {
2994 if (mask & ((1 << spd_limit) - 1))
2995 mask &= (1 << spd_limit) - 1;
2996 else {
2997 bit = ffs(mask) - 1;
2998 mask = 1 << bit;
2999 }
3000 }
3001
Tejun Heo936fd732007-08-06 18:36:23 +09003002 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003003
Tejun Heo936fd732007-08-06 18:36:23 +09003004 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09003005 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09003006
3007 return 0;
3008}
3009
Tejun Heo936fd732007-08-06 18:36:23 +09003010static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09003011{
Tejun Heo52702222007-10-31 10:17:07 +09003012 struct ata_link *host_link = &link->ap->link;
3013 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003014
Tejun Heo52702222007-10-31 10:17:07 +09003015 limit = link->sata_spd_limit;
3016
3017 /* Don't configure downstream link faster than upstream link.
3018 * It doesn't speed up anything and some PMPs choke on such
3019 * configuration.
3020 */
3021 if (!ata_is_host_link(link) && host_link->sata_spd)
3022 limit &= (1 << host_link->sata_spd) - 1;
3023
3024 if (limit == UINT_MAX)
3025 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003026 else
Tejun Heo52702222007-10-31 10:17:07 +09003027 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003028
3029 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09003030 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003031
Tejun Heo52702222007-10-31 10:17:07 +09003032 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003033}
3034
3035/**
Tejun Heo3c567b72006-05-15 20:57:23 +09003036 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09003037 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09003038 *
3039 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09003040 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09003041 * whether hardreset is necessary to apply SATA spd
3042 * configuration.
3043 *
3044 * LOCKING:
3045 * Inherited from caller.
3046 *
3047 * RETURNS:
3048 * 1 if SATA spd configuration is needed, 0 otherwise.
3049 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03003050static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09003051{
3052 u32 scontrol;
3053
Tejun Heo936fd732007-08-06 18:36:23 +09003054 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09003055 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003056
Tejun Heo936fd732007-08-06 18:36:23 +09003057 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003058}
3059
3060/**
Tejun Heo3c567b72006-05-15 20:57:23 +09003061 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09003062 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09003063 *
Tejun Heo936fd732007-08-06 18:36:23 +09003064 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09003065 *
3066 * LOCKING:
3067 * Inherited from caller.
3068 *
3069 * RETURNS:
3070 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09003071 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09003072 */
Tejun Heo936fd732007-08-06 18:36:23 +09003073int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09003074{
3075 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003076 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003077
Tejun Heo936fd732007-08-06 18:36:23 +09003078 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003079 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003080
Tejun Heo936fd732007-08-06 18:36:23 +09003081 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09003082 return 0;
3083
Tejun Heo936fd732007-08-06 18:36:23 +09003084 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003085 return rc;
3086
Tejun Heo1c3fae42006-04-02 20:53:28 +09003087 return 1;
3088}
3089
Alan Cox452503f2005-10-21 19:01:32 -04003090/*
3091 * This mode timing computation functionality is ported over from
3092 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3093 */
3094/*
Alan Coxb352e572006-08-10 18:52:12 +01003095 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04003096 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01003097 * for UDMA6, which is currently supported only by Maxtor drives.
3098 *
3099 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04003100 */
3101
3102static const struct ata_timing ata_timing[] = {
David Daney3ada9c12009-01-15 17:45:31 -08003103/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3104 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3105 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3106 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3107 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3108 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3109 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3110 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04003111
David Daney3ada9c12009-01-15 17:45:31 -08003112 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3113 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3114 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04003115
David Daney3ada9c12009-01-15 17:45:31 -08003116 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3117 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3118 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3119 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3120 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04003121
David Daney3ada9c12009-01-15 17:45:31 -08003122/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3123 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3124 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3125 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3126 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3127 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3128 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3129 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04003130
3131 { 0xFF }
3132};
3133
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003134#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3135#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04003136
3137static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
3138{
David Daney3ada9c12009-01-15 17:45:31 -08003139 q->setup = EZ(t->setup * 1000, T);
3140 q->act8b = EZ(t->act8b * 1000, T);
3141 q->rec8b = EZ(t->rec8b * 1000, T);
3142 q->cyc8b = EZ(t->cyc8b * 1000, T);
3143 q->active = EZ(t->active * 1000, T);
3144 q->recover = EZ(t->recover * 1000, T);
3145 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
3146 q->cycle = EZ(t->cycle * 1000, T);
3147 q->udma = EZ(t->udma * 1000, UT);
Alan Cox452503f2005-10-21 19:01:32 -04003148}
3149
3150void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
3151 struct ata_timing *m, unsigned int what)
3152{
3153 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
3154 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3155 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3156 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3157 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3158 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
David Daney3ada9c12009-01-15 17:45:31 -08003159 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
Alan Cox452503f2005-10-21 19:01:32 -04003160 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3161 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3162}
3163
Tejun Heo63573572007-11-27 19:43:39 +09003164const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04003165{
Tejun Heo70cd0712007-11-27 19:43:40 +09003166 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04003167
Tejun Heo70cd0712007-11-27 19:43:40 +09003168 while (xfer_mode > t->mode)
3169 t++;
3170
3171 if (xfer_mode == t->mode)
3172 return t;
3173 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04003174}
3175
3176int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3177 struct ata_timing *t, int T, int UT)
3178{
3179 const struct ata_timing *s;
3180 struct ata_timing p;
3181
3182 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003183 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08003184 */
Alan Cox452503f2005-10-21 19:01:32 -04003185
3186 if (!(s = ata_timing_find_mode(speed)))
3187 return -EINVAL;
3188
Albert Lee75b1f2f2005-11-16 17:06:18 +08003189 memcpy(t, s, sizeof(*s));
3190
Alan Cox452503f2005-10-21 19:01:32 -04003191 /*
3192 * If the drive is an EIDE drive, it can tell us it needs extended
3193 * PIO/MW_DMA cycle timing.
3194 */
3195
3196 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3197 memset(&p, 0, sizeof(p));
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003198 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
Alan Cox452503f2005-10-21 19:01:32 -04003199 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
3200 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003201 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
Alan Cox452503f2005-10-21 19:01:32 -04003202 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
3203 }
3204 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3205 }
3206
3207 /*
3208 * Convert the timing to bus clock counts.
3209 */
3210
Albert Lee75b1f2f2005-11-16 17:06:18 +08003211 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04003212
3213 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003214 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3215 * S.M.A.R.T * and some other commands. We have to ensure that the
3216 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04003217 */
3218
Alanfd3367af2006-12-07 12:41:18 +00003219 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04003220 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3221 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3222 }
3223
3224 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003225 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04003226 */
3227
3228 if (t->act8b + t->rec8b < t->cyc8b) {
3229 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3230 t->rec8b = t->cyc8b - t->act8b;
3231 }
3232
3233 if (t->active + t->recover < t->cycle) {
3234 t->active += (t->cycle - (t->active + t->recover)) / 2;
3235 t->recover = t->cycle - t->active;
3236 }
Jeff Garzika617c092007-05-21 20:14:23 -04003237
Alan Cox4f701d12007-04-23 11:55:36 +01003238 /* In a few cases quantisation may produce enough errors to
3239 leave t->cycle too low for the sum of active and recovery
3240 if so we must correct this */
3241 if (t->active + t->recover > t->cycle)
3242 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04003243
3244 return 0;
3245}
3246
Tejun Heocf176e12006-04-02 17:54:46 +09003247/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09003248 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3249 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3250 * @cycle: cycle duration in ns
3251 *
3252 * Return matching xfer mode for @cycle. The returned mode is of
3253 * the transfer type specified by @xfer_shift. If @cycle is too
3254 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3255 * than the fastest known mode, the fasted mode is returned.
3256 *
3257 * LOCKING:
3258 * None.
3259 *
3260 * RETURNS:
3261 * Matching xfer_mode, 0xff if no match found.
3262 */
3263u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3264{
3265 u8 base_mode = 0xff, last_mode = 0xff;
3266 const struct ata_xfer_ent *ent;
3267 const struct ata_timing *t;
3268
3269 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3270 if (ent->shift == xfer_shift)
3271 base_mode = ent->base;
3272
3273 for (t = ata_timing_find_mode(base_mode);
3274 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3275 unsigned short this_cycle;
3276
3277 switch (xfer_shift) {
3278 case ATA_SHIFT_PIO:
3279 case ATA_SHIFT_MWDMA:
3280 this_cycle = t->cycle;
3281 break;
3282 case ATA_SHIFT_UDMA:
3283 this_cycle = t->udma;
3284 break;
3285 default:
3286 return 0xff;
3287 }
3288
3289 if (cycle > this_cycle)
3290 break;
3291
3292 last_mode = t->mode;
3293 }
3294
3295 return last_mode;
3296}
3297
3298/**
Tejun Heocf176e12006-04-02 17:54:46 +09003299 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003300 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003301 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003302 *
3303 * Adjust xfer masks of @dev downward. Note that this function
3304 * does not apply the change. Invoking ata_set_mode() afterwards
3305 * will apply the limit.
3306 *
3307 * LOCKING:
3308 * Inherited from caller.
3309 *
3310 * RETURNS:
3311 * 0 on success, negative errno on failure
3312 */
Tejun Heo458337d2007-02-02 16:22:30 +09003313int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003314{
Tejun Heo458337d2007-02-02 16:22:30 +09003315 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003316 unsigned long orig_mask, xfer_mask;
3317 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003318 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003319
Tejun Heo458337d2007-02-02 16:22:30 +09003320 quiet = !!(sel & ATA_DNXFER_QUIET);
3321 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003322
Tejun Heo458337d2007-02-02 16:22:30 +09003323 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3324 dev->mwdma_mask,
3325 dev->udma_mask);
3326 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003327
Tejun Heo458337d2007-02-02 16:22:30 +09003328 switch (sel) {
3329 case ATA_DNXFER_PIO:
3330 highbit = fls(pio_mask) - 1;
3331 pio_mask &= ~(1 << highbit);
3332 break;
3333
3334 case ATA_DNXFER_DMA:
3335 if (udma_mask) {
3336 highbit = fls(udma_mask) - 1;
3337 udma_mask &= ~(1 << highbit);
3338 if (!udma_mask)
3339 return -ENOENT;
3340 } else if (mwdma_mask) {
3341 highbit = fls(mwdma_mask) - 1;
3342 mwdma_mask &= ~(1 << highbit);
3343 if (!mwdma_mask)
3344 return -ENOENT;
3345 }
3346 break;
3347
3348 case ATA_DNXFER_40C:
3349 udma_mask &= ATA_UDMA_MASK_40C;
3350 break;
3351
3352 case ATA_DNXFER_FORCE_PIO0:
3353 pio_mask &= 1;
3354 case ATA_DNXFER_FORCE_PIO:
3355 mwdma_mask = 0;
3356 udma_mask = 0;
3357 break;
3358
Tejun Heo458337d2007-02-02 16:22:30 +09003359 default:
3360 BUG();
3361 }
3362
3363 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3364
3365 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3366 return -ENOENT;
3367
3368 if (!quiet) {
3369 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3370 snprintf(buf, sizeof(buf), "%s:%s",
3371 ata_mode_string(xfer_mask),
3372 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3373 else
3374 snprintf(buf, sizeof(buf), "%s",
3375 ata_mode_string(xfer_mask));
3376
3377 ata_dev_printk(dev, KERN_WARNING,
3378 "limiting speed to %s\n", buf);
3379 }
Tejun Heocf176e12006-04-02 17:54:46 +09003380
3381 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3382 &dev->udma_mask);
3383
Tejun Heocf176e12006-04-02 17:54:46 +09003384 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003385}
3386
Tejun Heo3373efd2006-05-15 20:57:53 +09003387static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003389 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo4055dee2008-02-07 10:34:08 +09003390 const char *dev_err_whine = "";
3391 int ign_dev_err = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003392 unsigned int err_mask;
3393 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394
Tejun Heoe8384602006-04-02 18:51:53 +09003395 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396 if (dev->xfer_shift == ATA_SHIFT_PIO)
3397 dev->flags |= ATA_DFLAG_PIO;
3398
Tejun Heo3373efd2006-05-15 20:57:53 +09003399 err_mask = ata_dev_set_xfermode(dev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003400
Tejun Heo4055dee2008-02-07 10:34:08 +09003401 if (err_mask & ~AC_ERR_DEV)
3402 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003403
Tejun Heo4055dee2008-02-07 10:34:08 +09003404 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003405 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003406 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003407 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003408 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003409 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003410
Alan Coxb93fda12008-04-08 16:36:44 +01003411 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3412 /* Old CFA may refuse this command, which is just fine */
3413 if (ata_id_is_cfa(dev->id))
3414 ign_dev_err = 1;
3415 /* Catch several broken garbage emulations plus some pre
3416 ATA devices */
3417 if (ata_id_major_version(dev->id) == 0 &&
3418 dev->pio_mode <= XFER_PIO_2)
3419 ign_dev_err = 1;
3420 /* Some very old devices and some bad newer ones fail
3421 any kind of SET_XFERMODE request but support PIO0-2
3422 timings and no IORDY */
3423 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3424 ign_dev_err = 1;
3425 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003426 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3427 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3428 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3429 dev->dma_mode == XFER_MW_DMA_0 &&
3430 (dev->id[63] >> 8) & 1)
3431 ign_dev_err = 1;
3432
3433 /* if the device is actually configured correctly, ignore dev err */
3434 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3435 ign_dev_err = 1;
3436
3437 if (err_mask & AC_ERR_DEV) {
3438 if (!ign_dev_err)
3439 goto fail;
3440 else
3441 dev_err_whine = " (device error ignored)";
3442 }
3443
Tejun Heo23e71c32006-03-06 04:31:57 +09003444 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3445 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003446
Tejun Heo4055dee2008-02-07 10:34:08 +09003447 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3448 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3449 dev_err_whine);
3450
Tejun Heo83206a22006-03-24 15:25:31 +09003451 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003452
3453 fail:
3454 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3455 "(err_mask=0x%x)\n", err_mask);
3456 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457}
3458
Linus Torvalds1da177e2005-04-16 15:20:36 -07003459/**
Alan04351822007-03-06 02:37:52 -08003460 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003461 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003462 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003463 *
Alan04351822007-03-06 02:37:52 -08003464 * Standard implementation of the function used to tune and set
3465 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3466 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003467 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003468 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003470 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003471 *
3472 * RETURNS:
3473 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003474 */
Alan04351822007-03-06 02:37:52 -08003475
Tejun Heo02607312007-08-06 18:36:23 +09003476int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003477{
Tejun Heo02607312007-08-06 18:36:23 +09003478 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003479 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003480 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003481
Tejun Heoa6d5a512006-03-06 04:31:57 +09003482 /* step 1: calculate xfer_mask */
Tejun Heo1eca4362008-11-03 20:03:17 +09003483 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003484 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003485 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003486
Alan Coxb3a70602007-10-02 12:38:26 -04003487 mode_mask = ATA_DMA_MASK_ATA;
3488 if (dev->class == ATA_DEV_ATAPI)
3489 mode_mask = ATA_DMA_MASK_ATAPI;
3490 else if (ata_id_is_cfa(dev->id))
3491 mode_mask = ATA_DMA_MASK_CFA;
3492
Tejun Heo3373efd2006-05-15 20:57:53 +09003493 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003494 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003495
Tejun Heoacf356b2006-03-24 14:07:50 +09003496 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3497 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003498
3499 if (libata_dma_mask & mode_mask)
3500 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3501 else
3502 dma_mask = 0;
3503
Tejun Heoacf356b2006-03-24 14:07:50 +09003504 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3505 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003506
Tejun Heo4f659772006-04-01 01:38:18 +09003507 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003508 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003509 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003510 }
Tejun Heo4f659772006-04-01 01:38:18 +09003511 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003512 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003513
3514 /* step 2: always set host PIO timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003515 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo70cd0712007-11-27 19:43:40 +09003516 if (dev->pio_mode == 0xff) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003517 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003518 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003519 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003520 }
3521
3522 dev->xfer_mode = dev->pio_mode;
3523 dev->xfer_shift = ATA_SHIFT_PIO;
3524 if (ap->ops->set_piomode)
3525 ap->ops->set_piomode(ap, dev);
3526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003527
Tejun Heoa6d5a512006-03-06 04:31:57 +09003528 /* step 3: set host DMA timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003529 ata_for_each_dev(dev, link, ENABLED) {
3530 if (!ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003531 continue;
3532
3533 dev->xfer_mode = dev->dma_mode;
3534 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3535 if (ap->ops->set_dmamode)
3536 ap->ops->set_dmamode(ap, dev);
3537 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003538
3539 /* step 4: update devices' xfer mode */
Tejun Heo1eca4362008-11-03 20:03:17 +09003540 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo3373efd2006-05-15 20:57:53 +09003541 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003542 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003543 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003544 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003545
Tejun Heoe8e06192006-04-01 01:38:18 +09003546 /* Record simplex status. If we selected DMA then the other
3547 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003548 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003549 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003550 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003551
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003552 out:
3553 if (rc)
3554 *r_failed_dev = dev;
3555 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003556}
3557
3558/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003559 * ata_wait_ready - wait for link to become ready
3560 * @link: link to be waited on
3561 * @deadline: deadline jiffies for the operation
3562 * @check_ready: callback to check link readiness
3563 *
3564 * Wait for @link to become ready. @check_ready should return
3565 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3566 * link doesn't seem to be occupied, other errno for other error
3567 * conditions.
3568 *
3569 * Transient -ENODEV conditions are allowed for
3570 * ATA_TMOUT_FF_WAIT.
3571 *
3572 * LOCKING:
3573 * EH context.
3574 *
3575 * RETURNS:
3576 * 0 if @linke is ready before @deadline; otherwise, -errno.
3577 */
3578int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3579 int (*check_ready)(struct ata_link *link))
3580{
3581 unsigned long start = jiffies;
Tejun Heo341c2c92008-05-20 02:17:51 +09003582 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003583 int warned = 0;
3584
Tejun Heob1c72912008-07-31 17:02:43 +09003585 /* Slave readiness can't be tested separately from master. On
3586 * M/S emulation configuration, this function should be called
3587 * only on the master and it will handle both master and slave.
3588 */
3589 WARN_ON(link == link->ap->slave_link);
3590
Tejun Heoaa2731a2008-04-07 22:47:19 +09003591 if (time_after(nodev_deadline, deadline))
3592 nodev_deadline = deadline;
3593
3594 while (1) {
3595 unsigned long now = jiffies;
3596 int ready, tmp;
3597
3598 ready = tmp = check_ready(link);
3599 if (ready > 0)
3600 return 0;
3601
3602 /* -ENODEV could be transient. Ignore -ENODEV if link
3603 * is online. Also, some SATA devices take a long
3604 * time to clear 0xff after reset. For example,
3605 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3606 * GoVault needs even more than that. Wait for
3607 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3608 *
3609 * Note that some PATA controllers (pata_ali) explode
3610 * if status register is read more than once when
3611 * there's no device attached.
3612 */
3613 if (ready == -ENODEV) {
3614 if (ata_link_online(link))
3615 ready = 0;
3616 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3617 !ata_link_offline(link) &&
3618 time_before(now, nodev_deadline))
3619 ready = 0;
3620 }
3621
3622 if (ready)
3623 return ready;
3624 if (time_after(now, deadline))
3625 return -EBUSY;
3626
3627 if (!warned && time_after(now, start + 5 * HZ) &&
3628 (deadline - now > 3 * HZ)) {
3629 ata_link_printk(link, KERN_WARNING,
3630 "link is slow to respond, please be patient "
3631 "(ready=%d)\n", tmp);
3632 warned = 1;
3633 }
3634
3635 msleep(50);
3636 }
3637}
3638
3639/**
3640 * ata_wait_after_reset - wait for link to become ready after reset
3641 * @link: link to be waited on
3642 * @deadline: deadline jiffies for the operation
3643 * @check_ready: callback to check link readiness
3644 *
3645 * Wait for @link to become ready after reset.
3646 *
3647 * LOCKING:
3648 * EH context.
3649 *
3650 * RETURNS:
3651 * 0 if @linke is ready before @deadline; otherwise, -errno.
3652 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003653int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003654 int (*check_ready)(struct ata_link *link))
3655{
Tejun Heo341c2c92008-05-20 02:17:51 +09003656 msleep(ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003657
3658 return ata_wait_ready(link, deadline, check_ready);
3659}
3660
3661/**
Tejun Heo936fd732007-08-06 18:36:23 +09003662 * sata_link_debounce - debounce SATA phy status
3663 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003664 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003665 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003666 *
Tejun Heo936fd732007-08-06 18:36:23 +09003667* Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003668 * holding the same value where DET is not 1 for @duration polled
3669 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003670 * beginning of the stable state. Because DET gets stuck at 1 on
3671 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003672 * until timeout then returns 0 if DET is stable at 1.
3673 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003674 * @timeout is further limited by @deadline. The sooner of the
3675 * two is used.
3676 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003677 * LOCKING:
3678 * Kernel thread context (may sleep)
3679 *
3680 * RETURNS:
3681 * 0 on success, -errno on failure.
3682 */
Tejun Heo936fd732007-08-06 18:36:23 +09003683int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3684 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003685{
Tejun Heo341c2c92008-05-20 02:17:51 +09003686 unsigned long interval = params[0];
3687 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003688 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003689 u32 last, cur;
3690 int rc;
3691
Tejun Heo341c2c92008-05-20 02:17:51 +09003692 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003693 if (time_before(t, deadline))
3694 deadline = t;
3695
Tejun Heo936fd732007-08-06 18:36:23 +09003696 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003697 return rc;
3698 cur &= 0xf;
3699
3700 last = cur;
3701 last_jiffies = jiffies;
3702
3703 while (1) {
Tejun Heo341c2c92008-05-20 02:17:51 +09003704 msleep(interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003705 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003706 return rc;
3707 cur &= 0xf;
3708
3709 /* DET stable? */
3710 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003711 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003712 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003713 if (time_after(jiffies,
3714 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003715 return 0;
3716 continue;
3717 }
3718
3719 /* unstable, start over */
3720 last = cur;
3721 last_jiffies = jiffies;
3722
Tejun Heof1545152007-07-16 14:29:40 +09003723 /* Check deadline. If debouncing failed, return
3724 * -EPIPE to tell upper layer to lower link speed.
3725 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003726 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003727 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003728 }
3729}
3730
3731/**
Tejun Heo936fd732007-08-06 18:36:23 +09003732 * sata_link_resume - resume SATA link
3733 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003734 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003735 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003736 *
Tejun Heo936fd732007-08-06 18:36:23 +09003737 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003738 *
3739 * LOCKING:
3740 * Kernel thread context (may sleep)
3741 *
3742 * RETURNS:
3743 * 0 on success, -errno on failure.
3744 */
Tejun Heo936fd732007-08-06 18:36:23 +09003745int sata_link_resume(struct ata_link *link, const unsigned long *params,
3746 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003747{
Tejun Heoac371982008-04-07 22:47:19 +09003748 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003749 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003750
Tejun Heo936fd732007-08-06 18:36:23 +09003751 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003752 return rc;
3753
Tejun Heo852ee162006-04-01 01:38:18 +09003754 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09003755
Tejun Heo936fd732007-08-06 18:36:23 +09003756 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003757 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003758
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003759 /* Some PHYs react badly if SStatus is pounded immediately
3760 * after resuming. Delay 200ms before debouncing.
3761 */
3762 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003763
Tejun Heoac371982008-04-07 22:47:19 +09003764 if ((rc = sata_link_debounce(link, params, deadline)))
3765 return rc;
3766
Tejun Heof0465192008-05-19 01:15:08 +09003767 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003768 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3769 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003770
Tejun Heof0465192008-05-19 01:15:08 +09003771 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003772}
3773
Tejun Heof5914a42006-05-31 18:27:48 +09003774/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003775 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003776 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003777 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003778 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003779 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003780 * prereset makes libata abort whole reset sequence and give up
3781 * that port, so prereset should be best-effort. It does its
3782 * best to prepare for reset sequence but if things go wrong, it
3783 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003784 *
3785 * LOCKING:
3786 * Kernel thread context (may sleep)
3787 *
3788 * RETURNS:
3789 * 0 on success, -errno otherwise.
3790 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003791int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003792{
Tejun Heocc0680a2007-08-06 18:36:23 +09003793 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003794 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003795 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003796 int rc;
3797
Tejun Heof5914a42006-05-31 18:27:48 +09003798 /* if we're about to do hardreset, nothing more to do */
3799 if (ehc->i.action & ATA_EH_HARDRESET)
3800 return 0;
3801
Tejun Heo936fd732007-08-06 18:36:23 +09003802 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003803 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003804 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003805 /* whine about phy resume failure but proceed */
3806 if (rc && rc != -EOPNOTSUPP)
Tejun Heocc0680a2007-08-06 18:36:23 +09003807 ata_link_printk(link, KERN_WARNING, "failed to resume "
Tejun Heof5914a42006-05-31 18:27:48 +09003808 "link for reset (errno=%d)\n", rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003809 }
3810
Tejun Heo45db2f62008-04-08 01:46:56 +09003811 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003812 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003813 ehc->i.action &= ~ATA_EH_SOFTRESET;
3814
Tejun Heof5914a42006-05-31 18:27:48 +09003815 return 0;
3816}
3817
Tejun Heoc2bd5802006-01-24 17:05:22 +09003818/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003819 * sata_link_hardreset - reset link via SATA phy reset
3820 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003821 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003822 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003823 * @online: optional out parameter indicating link onlineness
3824 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003825 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003826 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003827 * After hardreset, link readiness is waited upon using
3828 * ata_wait_ready() if @check_ready is specified. LLDs are
3829 * allowed to not specify @check_ready and wait itself after this
3830 * function returns. Device classification is LLD's
3831 * responsibility.
3832 *
3833 * *@online is set to one iff reset succeeded and @link is online
3834 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003835 *
3836 * LOCKING:
3837 * Kernel thread context (may sleep)
3838 *
3839 * RETURNS:
3840 * 0 on success, -errno otherwise.
3841 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003842int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003843 unsigned long deadline,
3844 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003845{
Tejun Heo852ee162006-04-01 01:38:18 +09003846 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003847 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003848
Tejun Heoc2bd5802006-01-24 17:05:22 +09003849 DPRINTK("ENTER\n");
3850
Tejun Heo9dadd452008-04-07 22:47:19 +09003851 if (online)
3852 *online = false;
3853
Tejun Heo936fd732007-08-06 18:36:23 +09003854 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003855 /* SATA spec says nothing about how to reconfigure
3856 * spd. To be on the safe side, turn off phy during
3857 * reconfiguration. This works for at least ICH7 AHCI
3858 * and Sil3124.
3859 */
Tejun Heo936fd732007-08-06 18:36:23 +09003860 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003861 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003862
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003863 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003864
Tejun Heo936fd732007-08-06 18:36:23 +09003865 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003866 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003867
Tejun Heo936fd732007-08-06 18:36:23 +09003868 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003869 }
3870
3871 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003872 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003873 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003874
Tejun Heo852ee162006-04-01 01:38:18 +09003875 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003876
Tejun Heo936fd732007-08-06 18:36:23 +09003877 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003878 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003879
Tejun Heo1c3fae42006-04-02 20:53:28 +09003880 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003881 * 10.4.2 says at least 1 ms.
3882 */
3883 msleep(1);
3884
Tejun Heo936fd732007-08-06 18:36:23 +09003885 /* bring link back */
3886 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003887 if (rc)
3888 goto out;
3889 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003890 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003891 goto out;
3892
3893 /* Link is online. From this point, -ENODEV too is an error. */
3894 if (online)
3895 *online = true;
3896
Tejun Heo071f44b2008-04-07 22:47:22 +09003897 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003898 /* If PMP is supported, we have to do follow-up SRST.
3899 * Some PMPs don't send D2H Reg FIS after hardreset if
3900 * the first port is empty. Wait only for
3901 * ATA_TMOUT_PMP_SRST_WAIT.
3902 */
3903 if (check_ready) {
3904 unsigned long pmp_deadline;
3905
Tejun Heo341c2c92008-05-20 02:17:51 +09003906 pmp_deadline = ata_deadline(jiffies,
3907 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003908 if (time_after(pmp_deadline, deadline))
3909 pmp_deadline = deadline;
3910 ata_wait_ready(link, pmp_deadline, check_ready);
3911 }
3912 rc = -EAGAIN;
3913 goto out;
3914 }
3915
3916 rc = 0;
3917 if (check_ready)
3918 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003919 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003920 if (rc && rc != -EAGAIN) {
3921 /* online is set iff link is online && reset succeeded */
3922 if (online)
3923 *online = false;
Tejun Heo9dadd452008-04-07 22:47:19 +09003924 ata_link_printk(link, KERN_ERR,
3925 "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003926 }
Tejun Heob6103f62006-11-01 17:59:53 +09003927 DPRINTK("EXIT, rc=%d\n", rc);
3928 return rc;
3929}
3930
3931/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003932 * sata_std_hardreset - COMRESET w/o waiting or classification
3933 * @link: link to reset
3934 * @class: resulting class of attached device
3935 * @deadline: deadline jiffies for the operation
3936 *
3937 * Standard SATA COMRESET w/o waiting or classification.
3938 *
3939 * LOCKING:
3940 * Kernel thread context (may sleep)
3941 *
3942 * RETURNS:
3943 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3944 */
3945int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3946 unsigned long deadline)
3947{
3948 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3949 bool online;
3950 int rc;
3951
3952 /* do hardreset */
3953 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003954 return online ? -EAGAIN : rc;
3955}
3956
3957/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003958 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003959 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003960 * @classes: classes of attached devices
3961 *
3962 * This function is invoked after a successful reset. Note that
3963 * the device might have been reset more than once using
3964 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003965 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003966 * LOCKING:
3967 * Kernel thread context (may sleep)
3968 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003969void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003970{
Tejun Heof0465192008-05-19 01:15:08 +09003971 u32 serror;
3972
Tejun Heoc2bd5802006-01-24 17:05:22 +09003973 DPRINTK("ENTER\n");
3974
Tejun Heof0465192008-05-19 01:15:08 +09003975 /* reset complete, clear SError */
3976 if (!sata_scr_read(link, SCR_ERROR, &serror))
3977 sata_scr_write(link, SCR_ERROR, serror);
3978
Tejun Heoc2bd5802006-01-24 17:05:22 +09003979 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003980 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003981
Tejun Heoc2bd5802006-01-24 17:05:22 +09003982 DPRINTK("EXIT\n");
3983}
3984
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003985/**
Tejun Heo623a3122006-03-05 17:55:58 +09003986 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003987 * @dev: device to compare against
3988 * @new_class: class of the new device
3989 * @new_id: IDENTIFY page of the new device
3990 *
3991 * Compare @new_class and @new_id against @dev and determine
3992 * whether @dev is the device indicated by @new_class and
3993 * @new_id.
3994 *
3995 * LOCKING:
3996 * None.
3997 *
3998 * RETURNS:
3999 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4000 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004001static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
4002 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09004003{
4004 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09004005 unsigned char model[2][ATA_ID_PROD_LEN + 1];
4006 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09004007
4008 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09004009 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
4010 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09004011 return 0;
4012 }
4013
Tejun Heoa0cf7332007-01-02 20:18:49 +09004014 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
4015 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
4016 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
4017 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09004018
4019 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09004020 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
4021 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09004022 return 0;
4023 }
4024
4025 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09004026 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
4027 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09004028 return 0;
4029 }
4030
Tejun Heo623a3122006-03-05 17:55:58 +09004031 return 1;
4032}
4033
4034/**
Tejun Heofe309112007-05-15 03:28:15 +09004035 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02004036 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09004037 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09004038 *
4039 * Re-read IDENTIFY page and make sure @dev is still attached to
4040 * the port.
4041 *
4042 * LOCKING:
4043 * Kernel thread context (may sleep)
4044 *
4045 * RETURNS:
4046 * 0 on success, negative errno otherwise
4047 */
Tejun Heofe309112007-05-15 03:28:15 +09004048int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09004049{
Tejun Heo5eb45c02006-04-02 18:51:52 +09004050 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004051 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09004052 int rc;
4053
Tejun Heofe635c72006-05-15 20:57:35 +09004054 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09004055 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09004056 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09004057 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09004058
4059 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09004060 if (!ata_dev_same_device(dev, class, id))
4061 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09004062
Tejun Heofe635c72006-05-15 20:57:35 +09004063 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09004064 return 0;
4065}
4066
4067/**
4068 * ata_dev_revalidate - Revalidate ATA device
4069 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09004070 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09004071 * @readid_flags: read ID flags
4072 *
4073 * Re-read IDENTIFY page, make sure @dev is still attached to the
4074 * port and reconfigure it according to the new IDENTIFY page.
4075 *
4076 * LOCKING:
4077 * Kernel thread context (may sleep)
4078 *
4079 * RETURNS:
4080 * 0 on success, negative errno otherwise
4081 */
Tejun Heo422c9da2007-09-23 13:14:12 +09004082int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4083 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09004084{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004085 u64 n_sectors = dev->n_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09004086 int rc;
4087
4088 if (!ata_dev_enabled(dev))
4089 return -ENODEV;
4090
Tejun Heo422c9da2007-09-23 13:14:12 +09004091 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4092 if (ata_class_enabled(new_class) &&
4093 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
4094 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4095 dev->class, new_class);
4096 rc = -ENODEV;
4097 goto fail;
4098 }
4099
Tejun Heofe309112007-05-15 03:28:15 +09004100 /* re-read ID */
4101 rc = ata_dev_reread_id(dev, readid_flags);
4102 if (rc)
4103 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09004104
4105 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09004106 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004107 if (rc)
4108 goto fail;
4109
4110 /* verify n_sectors hasn't changed */
Tejun Heob54eebd2007-08-17 18:46:51 +09004111 if (dev->class == ATA_DEV_ATA && n_sectors &&
4112 dev->n_sectors != n_sectors) {
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004113 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4114 "%llu != %llu\n",
4115 (unsigned long long)n_sectors,
4116 (unsigned long long)dev->n_sectors);
Tejun Heo8270bec2007-08-16 03:02:22 +09004117
4118 /* restore original n_sectors */
4119 dev->n_sectors = n_sectors;
4120
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004121 rc = -ENODEV;
4122 goto fail;
4123 }
4124
4125 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09004126
4127 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09004128 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09004129 return rc;
4130}
4131
Alan Cox6919a0a2006-10-27 19:08:46 -07004132struct ata_blacklist_entry {
4133 const char *model_num;
4134 const char *model_rev;
4135 unsigned long horkage;
4136};
4137
4138static const struct ata_blacklist_entry ata_device_blacklist [] = {
4139 /* Devices with DMA related problems under Linux */
4140 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4141 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4142 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4143 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4144 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4145 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4146 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4147 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4148 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4149 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4150 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4151 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4152 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4153 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4154 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4155 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4156 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4157 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4158 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4159 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4160 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4161 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4162 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4163 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4164 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4165 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004166 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4167 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004168 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004169 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004170 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004171 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004172
Albert Lee18d6e9d2007-04-02 11:34:15 +08004173 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004174 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004175 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004176
Alan Cox6919a0a2006-10-27 19:08:46 -07004177 /* Devices we expect to fail diagnostics */
4178
4179 /* Devices where NCQ should be avoided */
4180 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004181 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004182 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004183 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4184 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004185 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004186 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004187 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004188 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004189 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Lubomir Bulej5ccfca92008-12-22 11:35:22 +01004190 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004191
Tejun Heoac70a962008-11-27 13:36:48 +09004192 /* Seagate NCQ + FLUSH CACHE firmware bug */
Tejun Heod10d4912008-12-11 13:42:42 +09004193 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004194 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004195 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004196 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004197 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004198 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004199 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004200 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004201 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004202 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004203
4204 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ |
4205 ATA_HORKAGE_FIRMWARE_WARN },
4206 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ |
4207 ATA_HORKAGE_FIRMWARE_WARN },
4208 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ |
4209 ATA_HORKAGE_FIRMWARE_WARN },
4210 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ |
4211 ATA_HORKAGE_FIRMWARE_WARN },
4212 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ |
4213 ATA_HORKAGE_FIRMWARE_WARN },
4214
4215 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ |
4216 ATA_HORKAGE_FIRMWARE_WARN },
4217 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ |
4218 ATA_HORKAGE_FIRMWARE_WARN },
4219 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ |
4220 ATA_HORKAGE_FIRMWARE_WARN },
4221 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ |
4222 ATA_HORKAGE_FIRMWARE_WARN },
4223 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ |
4224 ATA_HORKAGE_FIRMWARE_WARN },
4225
4226 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ |
4227 ATA_HORKAGE_FIRMWARE_WARN },
4228 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ |
4229 ATA_HORKAGE_FIRMWARE_WARN },
4230 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ |
4231 ATA_HORKAGE_FIRMWARE_WARN },
4232 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ |
4233 ATA_HORKAGE_FIRMWARE_WARN },
4234 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ |
4235 ATA_HORKAGE_FIRMWARE_WARN },
4236
4237 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ |
4238 ATA_HORKAGE_FIRMWARE_WARN },
4239 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ |
4240 ATA_HORKAGE_FIRMWARE_WARN },
4241 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ |
4242 ATA_HORKAGE_FIRMWARE_WARN },
4243 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ |
4244 ATA_HORKAGE_FIRMWARE_WARN },
4245 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ |
4246 ATA_HORKAGE_FIRMWARE_WARN },
4247
4248 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ |
4249 ATA_HORKAGE_FIRMWARE_WARN },
4250 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ |
4251 ATA_HORKAGE_FIRMWARE_WARN },
4252 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ |
4253 ATA_HORKAGE_FIRMWARE_WARN },
4254 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ |
4255 ATA_HORKAGE_FIRMWARE_WARN },
4256 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004257 ATA_HORKAGE_FIRMWARE_WARN },
4258
Robert Hancock36e337d2007-04-02 22:05:29 -06004259 /* Blacklist entries taken from Silicon Image 3124/3132
4260 Windows driver .inf file - also several Linux problem reports */
4261 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4262 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4263 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004264
Tejun Heo16c55b02007-08-29 11:58:33 +09004265 /* devices which puke on READ_NATIVE_MAX */
4266 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4267 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4268 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4269 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004270
Alan Cox93328e12007-09-29 04:06:48 -04004271 /* Devices which report 1 sector over size HPA */
4272 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4273 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004274 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004275
Alan Cox6bbfd532007-11-05 22:58:58 +00004276 /* Devices which get the IVB wrong */
4277 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004278 /* Maybe we should just blacklist TSSTcorp... */
4279 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4280 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004281 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
Peter Missele9f33402007-11-27 18:04:42 +01004282 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4283 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4284 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004285
Jens Axboe9ce8e302008-08-27 15:23:18 +02004286 /* Devices that do not need bridging limits applied */
4287 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4288
Tejun Heo90627122009-01-29 20:31:36 +09004289 /* Devices which aren't very happy with higher link speeds */
4290 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4291
Alan Cox6919a0a2006-10-27 19:08:46 -07004292 /* End Marker */
4293 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004294};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004295
Adrian Bunk741b7762007-10-24 18:23:06 +02004296static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004297{
4298 const char *p;
4299 int len;
4300
4301 /*
4302 * check for trailing wildcard: *\0
4303 */
4304 p = strchr(patt, wildchar);
4305 if (p && ((*(p + 1)) == 0))
4306 len = p - patt;
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004307 else {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004308 len = strlen(name);
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004309 if (!len) {
4310 if (!*patt)
4311 return 0;
4312 return -1;
4313 }
4314 }
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004315
4316 return strncmp(patt, name, len);
4317}
4318
Tejun Heo75683fe2007-07-05 13:31:27 +09004319static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004320{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004321 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4322 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004323 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004324
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004325 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4326 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004327
Alan Cox6919a0a2006-10-27 19:08:46 -07004328 while (ad->model_num) {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004329 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004330 if (ad->model_rev == NULL)
4331 return ad->horkage;
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004332 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
Alan Cox6919a0a2006-10-27 19:08:46 -07004333 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004334 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004335 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004337 return 0;
4338}
4339
Alan Cox6919a0a2006-10-27 19:08:46 -07004340static int ata_dma_blacklisted(const struct ata_device *dev)
4341{
4342 /* We don't support polling DMA.
4343 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4344 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4345 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004346 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004347 (dev->flags & ATA_DFLAG_CDB_INTR))
4348 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004349 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004350}
4351
Tejun Heoa6d5a512006-03-06 04:31:57 +09004352/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004353 * ata_is_40wire - check drive side detection
4354 * @dev: device
4355 *
4356 * Perform drive side detection decoding, allowing for device vendors
4357 * who can't follow the documentation.
4358 */
4359
4360static int ata_is_40wire(struct ata_device *dev)
4361{
4362 if (dev->horkage & ATA_HORKAGE_IVB)
4363 return ata_drive_40wire_relaxed(dev->id);
4364 return ata_drive_40wire(dev->id);
4365}
4366
4367/**
Alan Cox15a55512008-03-28 14:33:46 -07004368 * cable_is_40wire - 40/80/SATA decider
4369 * @ap: port to consider
4370 *
4371 * This function encapsulates the policy for speed management
4372 * in one place. At the moment we don't cache the result but
4373 * there is a good case for setting ap->cbl to the result when
4374 * we are called with unknown cables (and figuring out if it
4375 * impacts hotplug at all).
4376 *
4377 * Return 1 if the cable appears to be 40 wire.
4378 */
4379
4380static int cable_is_40wire(struct ata_port *ap)
4381{
4382 struct ata_link *link;
4383 struct ata_device *dev;
4384
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004385 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004386 if (ap->cbl == ATA_CBL_PATA40)
4387 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004388
4389 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004390 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4391 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004392
4393 /* If the system is known to be 40 wire short cable (eg
4394 * laptop), then we allow 80 wire modes even if the drive
4395 * isn't sure.
4396 */
Alan Coxf7920682008-04-08 16:37:50 +01004397 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4398 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004399
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004400 /* If the controller doesn't know, we scan.
4401 *
4402 * Note: We look for all 40 wire detects at this point. Any
4403 * 80 wire detect is taken to be 80 wire cable because
4404 * - in many setups only the one drive (slave if present) will
4405 * give a valid detect
4406 * - if you have a non detect capable drive you don't want it
4407 * to colour the choice
4408 */
Tejun Heo1eca4362008-11-03 20:03:17 +09004409 ata_for_each_link(link, ap, EDGE) {
4410 ata_for_each_dev(dev, link, ENABLED) {
4411 if (!ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004412 return 0;
4413 }
4414 }
4415 return 1;
4416}
4417
4418/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004419 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004420 * @dev: Device to compute xfermask for
4421 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004422 * Compute supported xfermask of @dev and store it in
4423 * dev->*_mask. This function is responsible for applying all
4424 * known limits including host controller limits, device
4425 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004426 *
4427 * LOCKING:
4428 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004429 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004430static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004431{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004432 struct ata_link *link = dev->link;
4433 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004434 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004435 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004436
Tejun Heo37deecb2006-08-10 16:59:07 +09004437 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004438 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4439 ap->mwdma_mask, ap->udma_mask);
4440
Robert Hancock8343f882007-03-06 02:37:51 -08004441 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004442 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4443 dev->mwdma_mask, dev->udma_mask);
4444 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004445
Alan Coxb352e572006-08-10 18:52:12 +01004446 /*
4447 * CFA Advanced TrueIDE timings are not allowed on a shared
4448 * cable
4449 */
4450 if (ata_dev_pair(dev)) {
4451 /* No PIO5 or PIO6 */
4452 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4453 /* No MWDMA3 or MWDMA 4 */
4454 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4455 }
4456
Tejun Heo37deecb2006-08-10 16:59:07 +09004457 if (ata_dma_blacklisted(dev)) {
4458 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09004459 ata_dev_printk(dev, KERN_WARNING,
4460 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004461 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004462
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004463 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004464 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004465 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4466 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4467 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004468 }
Tejun Heo565083e2006-04-02 17:54:47 +09004469
Jeff Garzike4246752007-03-09 09:56:46 -05004470 if (ap->flags & ATA_FLAG_NO_IORDY)
4471 xfer_mask &= ata_pio_mask_no_iordy(dev);
4472
Alan Cox5444a6f2006-03-27 18:58:20 +01004473 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004474 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004475
Robert Hancock8343f882007-03-06 02:37:51 -08004476 /* Apply cable rule here. Don't apply it early because when
4477 * we handle hot plug the cable type can itself change.
4478 * Check this last so that we know if the transfer rate was
4479 * solely limited by the cable.
4480 * Unknown or 80 wire cables reported host side are checked
4481 * drive side as well. Cases where we know a 40wire cable
4482 * is used safely for 80 are not checked here.
4483 */
4484 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4485 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004486 if (cable_is_40wire(ap)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004487 ata_dev_printk(dev, KERN_WARNING,
Robert Hancock8343f882007-03-06 02:37:51 -08004488 "limited to UDMA/33 due to 40-wire cable\n");
4489 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4490 }
4491
Tejun Heo565083e2006-04-02 17:54:47 +09004492 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4493 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004494}
4495
Linus Torvalds1da177e2005-04-16 15:20:36 -07004496/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004497 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004498 * @dev: Device to which command will be sent
4499 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004500 * Issue SET FEATURES - XFER MODE command to device @dev
4501 * on port @ap.
4502 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004503 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004504 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004505 *
4506 * RETURNS:
4507 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004508 */
4509
Tejun Heo3373efd2006-05-15 20:57:53 +09004510static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004511{
Tejun Heoa0123702005-12-13 14:49:31 +09004512 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004513 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004514
4515 /* set up set-features taskfile */
4516 DPRINTK("set features - xfer mode\n");
4517
Tejun Heo464cf172007-05-27 15:10:40 +02004518 /* Some controllers and ATAPI devices show flaky interrupt
4519 * behavior after setting xfer mode. Use polling instead.
4520 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004521 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004522 tf.command = ATA_CMD_SET_FEATURES;
4523 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004524 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004525 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004526 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004527 if (ata_pio_need_iordy(dev))
4528 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004529 /* If the device has IORDY and the controller does not - turn it off */
4530 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004531 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004532 else /* In the ancient relic department - skip all of this */
4533 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534
Tejun Heo2b789102007-10-09 15:05:44 +09004535 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536
Tejun Heo83206a22006-03-24 15:25:31 +09004537 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4538 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004541 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004542 * @dev: Device to which command will be sent
4543 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004544 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004545 *
4546 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004547 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004548 *
4549 * LOCKING:
4550 * PCI/etc. bus probe sem.
4551 *
4552 * RETURNS:
4553 * 0 on success, AC_ERR_* mask otherwise.
4554 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04004555static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4556 u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004557{
4558 struct ata_taskfile tf;
4559 unsigned int err_mask;
4560
4561 /* set up set-features taskfile */
4562 DPRINTK("set features - SATA features\n");
4563
4564 ata_tf_init(dev, &tf);
4565 tf.command = ATA_CMD_SET_FEATURES;
4566 tf.feature = enable;
4567 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4568 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004569 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004570
Tejun Heo2b789102007-10-09 15:05:44 +09004571 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004572
4573 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4574 return err_mask;
4575}
4576
4577/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04004578 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04004579 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004580 * @heads: Number of heads (taskfile parameter)
4581 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004582 *
4583 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004584 * Kernel thread context (may sleep)
4585 *
4586 * RETURNS:
4587 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04004588 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004589static unsigned int ata_dev_init_params(struct ata_device *dev,
4590 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004591{
Tejun Heoa0123702005-12-13 14:49:31 +09004592 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004593 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004594
4595 /* Number of sectors per track 1-255. Number of heads 1-16 */
4596 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004597 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004598
4599 /* set up init dev params taskfile */
4600 DPRINTK("init dev params \n");
4601
Tejun Heo3373efd2006-05-15 20:57:53 +09004602 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004603 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4604 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4605 tf.protocol = ATA_PROT_NODATA;
4606 tf.nsect = sectors;
4607 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04004608
Tejun Heo2b789102007-10-09 15:05:44 +09004609 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004610 /* A clean abort indicates an original or just out of spec drive
4611 and we should continue as we issue the setup based on the
4612 drive reported working geometry */
4613 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4614 err_mask = 0;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004615
Tejun Heo6aff8f12006-02-15 18:24:09 +09004616 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4617 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004618}
4619
4620/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004621 * ata_sg_clean - Unmap DMA memory associated with command
4622 * @qc: Command containing DMA memory to be released
4623 *
4624 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004625 *
4626 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004627 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004628 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004629void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004630{
4631 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004632 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004633 int dir = qc->dma_dir;
4634
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004635 WARN_ON_ONCE(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004636
James Bottomleydde20202008-02-19 11:36:56 +01004637 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004638
James Bottomleydde20202008-02-19 11:36:56 +01004639 if (qc->n_elem)
FUJITA Tomonori58256272009-02-27 17:35:43 +09004640 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004641
4642 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004643 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004644}
4645
4646/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004647 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004648 * @qc: Metadata associated with taskfile to check
4649 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004650 * Allow low-level driver to filter ATA PACKET commands, returning
4651 * a status indicating whether or not it is OK to use DMA for the
4652 * supplied PACKET command.
4653 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004654 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004655 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004656 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004657 * RETURNS: 0 when ATAPI DMA can be used
4658 * nonzero otherwise
4659 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004660int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004661{
4662 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004663
Tejun Heob9a41972007-06-27 02:48:43 +09004664 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4665 * few ATAPI devices choke on such DMA requests.
4666 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004667 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4668 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004669 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004670
Linus Torvalds1da177e2005-04-16 15:20:36 -07004671 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004672 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004673
Tejun Heob9a41972007-06-27 02:48:43 +09004674 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004675}
Tejun Heob9a41972007-06-27 02:48:43 +09004676
Linus Torvalds1da177e2005-04-16 15:20:36 -07004677/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004678 * ata_std_qc_defer - Check whether a qc needs to be deferred
4679 * @qc: ATA command in question
4680 *
4681 * Non-NCQ commands cannot run with any other command, NCQ or
4682 * not. As upper layer only knows the queue depth, we are
4683 * responsible for maintaining exclusion. This function checks
4684 * whether a new command @qc can be issued.
4685 *
4686 * LOCKING:
4687 * spin_lock_irqsave(host lock)
4688 *
4689 * RETURNS:
4690 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4691 */
4692int ata_std_qc_defer(struct ata_queued_cmd *qc)
4693{
4694 struct ata_link *link = qc->dev->link;
4695
4696 if (qc->tf.protocol == ATA_PROT_NCQ) {
4697 if (!ata_tag_valid(link->active_tag))
4698 return 0;
4699 } else {
4700 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4701 return 0;
4702 }
4703
4704 return ATA_DEFER_LINK;
4705}
4706
Brian Kinge46834c2006-03-17 17:04:03 -06004707void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4708
Jeff Garzik0cba6322005-05-30 19:49:12 -04004709/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004710 * ata_sg_init - Associate command with scatter-gather table.
4711 * @qc: Command to be associated
4712 * @sg: Scatter-gather table.
4713 * @n_elem: Number of elements in s/g table.
4714 *
4715 * Initialize the data-related elements of queued_cmd @qc
4716 * to point to a scatter-gather table @sg, containing @n_elem
4717 * elements.
4718 *
4719 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004720 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004721 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004722void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4723 unsigned int n_elem)
4724{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004725 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004726 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004727 qc->cursg = qc->sg;
4728}
4729
Linus Torvalds1da177e2005-04-16 15:20:36 -07004730/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004731 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4732 * @qc: Command with scatter-gather table to be mapped.
4733 *
4734 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004735 *
4736 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004737 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004738 *
4739 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004740 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004741 *
4742 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004743static int ata_sg_setup(struct ata_queued_cmd *qc)
4744{
4745 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004746 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004747
Tejun Heo44877b42007-02-21 01:06:51 +09004748 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749
James Bottomleydde20202008-02-19 11:36:56 +01004750 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4751 if (n_elem < 1)
4752 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004753
James Bottomleydde20202008-02-19 11:36:56 +01004754 DPRINTK("%d sg elements mapped\n", n_elem);
FUJITA Tomonori58256272009-02-27 17:35:43 +09004755 qc->orig_n_elem = qc->n_elem;
James Bottomleydde20202008-02-19 11:36:56 +01004756 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004757 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004758
4759 return 0;
4760}
4761
4762/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004763 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004764 * @buf: Buffer to swap
4765 * @buf_words: Number of 16-bit words in buffer.
4766 *
4767 * Swap halves of 16-bit words if needed to convert from
4768 * little-endian byte order to native cpu byte order, or
4769 * vice-versa.
4770 *
4771 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004772 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004773 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004774void swap_buf_le16(u16 *buf, unsigned int buf_words)
4775{
4776#ifdef __BIG_ENDIAN
4777 unsigned int i;
4778
4779 for (i = 0; i < buf_words; i++)
4780 buf[i] = le16_to_cpu(buf[i]);
4781#endif /* __BIG_ENDIAN */
4782}
4783
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004784/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004785 * ata_qc_new - Request an available ATA command, for queueing
Randy Dunlap5eb66fe2009-01-20 16:28:59 -08004786 * @ap: target port
Tejun Heo8a8bc222008-11-10 14:48:21 +09004787 *
4788 * LOCKING:
4789 * None.
4790 */
4791
4792static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4793{
4794 struct ata_queued_cmd *qc = NULL;
4795 unsigned int i;
4796
4797 /* no command while frozen */
4798 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4799 return NULL;
4800
4801 /* the last tag is reserved for internal command. */
4802 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4803 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4804 qc = __ata_qc_from_tag(ap, i);
4805 break;
4806 }
4807
4808 if (qc)
4809 qc->tag = i;
4810
4811 return qc;
4812}
4813
4814/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004815 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004816 * @dev: Device from whom we request an available command structure
4817 *
4818 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004819 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820 */
4821
Tejun Heo8a8bc222008-11-10 14:48:21 +09004822struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004823{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004824 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004825 struct ata_queued_cmd *qc;
4826
Tejun Heo8a8bc222008-11-10 14:48:21 +09004827 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004828 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004829 qc->scsicmd = NULL;
4830 qc->ap = ap;
4831 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004832
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004833 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004834 }
4835
4836 return qc;
4837}
4838
Tejun Heo8a8bc222008-11-10 14:48:21 +09004839/**
4840 * ata_qc_free - free unused ata_queued_cmd
4841 * @qc: Command to complete
4842 *
4843 * Designed to free unused ata_queued_cmd object
4844 * in case something prevents using it.
4845 *
4846 * LOCKING:
4847 * spin_lock_irqsave(host lock)
4848 */
4849void ata_qc_free(struct ata_queued_cmd *qc)
4850{
4851 struct ata_port *ap = qc->ap;
4852 unsigned int tag;
4853
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004854 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Tejun Heo8a8bc222008-11-10 14:48:21 +09004855
4856 qc->flags = 0;
4857 tag = qc->tag;
4858 if (likely(ata_tag_valid(tag))) {
4859 qc->tag = ATA_TAG_POISON;
4860 clear_bit(tag, &ap->qc_allocated);
4861 }
4862}
4863
Tejun Heo76014422006-02-11 15:13:49 +09004864void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004865{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004866 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004867 struct ata_link *link = qc->dev->link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004868
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004869 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4870 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004871
4872 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4873 ata_sg_clean(qc);
4874
Tejun Heo7401abf2006-05-15 20:57:32 +09004875 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004876 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004877 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004878 if (!link->sactive)
4879 ap->nr_active_links--;
4880 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004881 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004882 ap->nr_active_links--;
4883 }
4884
4885 /* clear exclusive status */
4886 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4887 ap->excl_link == link))
4888 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004889
Albert Lee3f3791d2005-08-16 14:25:38 +08004890 /* atapi: mark qc as inactive to prevent the interrupt handler
4891 * from completing the command twice later, before the error handler
4892 * is called. (when rc != 0 and atapi request sense is needed)
4893 */
4894 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004895 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004896
Linus Torvalds1da177e2005-04-16 15:20:36 -07004897 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004898 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004899}
4900
Tejun Heo39599a52006-11-14 22:37:35 +09004901static void fill_result_tf(struct ata_queued_cmd *qc)
4902{
4903 struct ata_port *ap = qc->ap;
4904
Tejun Heo39599a52006-11-14 22:37:35 +09004905 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004906 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004907}
4908
Tejun Heo00115e02007-11-27 19:28:58 +09004909static void ata_verify_xfer(struct ata_queued_cmd *qc)
4910{
4911 struct ata_device *dev = qc->dev;
4912
4913 if (ata_tag_internal(qc->tag))
4914 return;
4915
4916 if (ata_is_nodata(qc->tf.protocol))
4917 return;
4918
4919 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4920 return;
4921
4922 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4923}
4924
Tejun Heof686bcb2006-05-15 20:58:05 +09004925/**
4926 * ata_qc_complete - Complete an active ATA command
4927 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004928 *
4929 * Indicate to the mid and upper layers that an ATA
4930 * command has completed, with either an ok or not-ok status.
4931 *
4932 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004933 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004934 */
4935void ata_qc_complete(struct ata_queued_cmd *qc)
4936{
4937 struct ata_port *ap = qc->ap;
4938
4939 /* XXX: New EH and old EH use different mechanisms to
4940 * synchronize EH with regular execution path.
4941 *
4942 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4943 * Normal execution path is responsible for not accessing a
4944 * failed qc. libata core enforces the rule by returning NULL
4945 * from ata_qc_from_tag() for failed qcs.
4946 *
4947 * Old EH depends on ata_qc_complete() nullifying completion
4948 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4949 * not synchronize with interrupt handler. Only PIO task is
4950 * taken care of.
4951 */
4952 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004953 struct ata_device *dev = qc->dev;
4954 struct ata_eh_info *ehi = &dev->link->eh_info;
4955
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004956 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004957
4958 if (unlikely(qc->err_mask))
4959 qc->flags |= ATA_QCFLAG_FAILED;
4960
4961 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4962 if (!ata_tag_internal(qc->tag)) {
4963 /* always fill result TF for failed qc */
Tejun Heo39599a52006-11-14 22:37:35 +09004964 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004965 ata_qc_schedule_eh(qc);
4966 return;
4967 }
4968 }
4969
4970 /* read result TF if requested */
4971 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004972 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004973
Tejun Heo4dbfa392007-10-25 18:22:44 +09004974 /* Some commands need post-processing after successful
4975 * completion.
4976 */
4977 switch (qc->tf.command) {
4978 case ATA_CMD_SET_FEATURES:
4979 if (qc->tf.feature != SETFEATURES_WC_ON &&
4980 qc->tf.feature != SETFEATURES_WC_OFF)
4981 break;
4982 /* fall through */
4983 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4984 case ATA_CMD_SET_MULTI: /* multi_count changed */
4985 /* revalidate device */
4986 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4987 ata_port_schedule_eh(ap);
4988 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004989
4990 case ATA_CMD_SLEEP:
4991 dev->flags |= ATA_DFLAG_SLEEPING;
4992 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09004993 }
4994
Tejun Heo00115e02007-11-27 19:28:58 +09004995 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4996 ata_verify_xfer(qc);
4997
Tejun Heof686bcb2006-05-15 20:58:05 +09004998 __ata_qc_complete(qc);
4999 } else {
5000 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5001 return;
5002
5003 /* read result TF if failed or requested */
5004 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09005005 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005006
5007 __ata_qc_complete(qc);
5008 }
5009}
5010
Tejun Heodedaf2b2006-05-15 21:03:43 +09005011/**
5012 * ata_qc_complete_multiple - Complete multiple qcs successfully
5013 * @ap: port in question
5014 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09005015 *
5016 * Complete in-flight commands. This functions is meant to be
5017 * called from low-level driver's interrupt routine to complete
5018 * requests normally. ap->qc_active and @qc_active is compared
5019 * and commands are completed accordingly.
5020 *
5021 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005022 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09005023 *
5024 * RETURNS:
5025 * Number of completed commands on success, -errno otherwise.
5026 */
Tejun Heo79f97da2008-04-07 22:47:20 +09005027int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09005028{
5029 int nr_done = 0;
5030 u32 done_mask;
5031 int i;
5032
5033 done_mask = ap->qc_active ^ qc_active;
5034
5035 if (unlikely(done_mask & qc_active)) {
5036 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5037 "(%08x->%08x)\n", ap->qc_active, qc_active);
5038 return -EINVAL;
5039 }
5040
5041 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5042 struct ata_queued_cmd *qc;
5043
5044 if (!(done_mask & (1 << i)))
5045 continue;
5046
5047 if ((qc = ata_qc_from_tag(ap, i))) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09005048 ata_qc_complete(qc);
5049 nr_done++;
5050 }
5051 }
5052
5053 return nr_done;
5054}
5055
Linus Torvalds1da177e2005-04-16 15:20:36 -07005056/**
5057 * ata_qc_issue - issue taskfile to device
5058 * @qc: command to issue to device
5059 *
5060 * Prepare an ATA command to submission to device.
5061 * This includes mapping the data into a DMA-able
5062 * area, filling in the S/G table, and finally
5063 * writing the taskfile to hardware, starting the command.
5064 *
5065 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005066 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005067 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09005068void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005069{
5070 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005071 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09005072 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005073
Tejun Heodedaf2b2006-05-15 21:03:43 +09005074 /* Make sure only one non-NCQ command is outstanding. The
5075 * check is skipped for old EH because it reuses active qc to
5076 * request ATAPI sense.
5077 */
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005078 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09005079
Tejun Heo1973a022007-12-05 10:36:13 +09005080 if (ata_is_ncq(prot)) {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005081 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09005082
5083 if (!link->sactive)
5084 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005085 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005086 } else {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005087 WARN_ON_ONCE(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09005088
5089 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005090 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005091 }
5092
Tejun Heoe4a70e72006-03-31 20:36:47 +09005093 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005094 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005095
Tejun Heof92a2632007-12-05 16:43:10 +09005096 /* We guarantee to LLDs that they will have at least one
5097 * non-zero sg if the command is a data command.
5098 */
Tejun Heoff2aeb12007-12-05 16:43:11 +09005099 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
Tejun Heof92a2632007-12-05 16:43:10 +09005100
Tejun Heo405e66b2007-11-27 19:28:53 +09005101 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09005102 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09005103 if (ata_sg_setup(qc))
5104 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005105
Tejun Heocf480622008-01-24 00:05:14 +09005106 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09005107 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09005108 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005109 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5110 ata_link_abort(link);
5111 return;
5112 }
5113
Linus Torvalds1da177e2005-04-16 15:20:36 -07005114 ap->ops->qc_prep(qc);
5115
Tejun Heo8e0e6942006-03-31 20:41:11 +09005116 qc->err_mask |= ap->ops->qc_issue(qc);
5117 if (unlikely(qc->err_mask))
5118 goto err;
5119 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005120
Tejun Heo8e436af2006-01-23 13:09:36 +09005121sg_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09005122 qc->err_mask |= AC_ERR_SYSTEM;
5123err:
5124 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005125}
5126
5127/**
Tejun Heo34bf2172006-05-15 20:57:46 +09005128 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09005129 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09005130 *
Tejun Heo936fd732007-08-06 18:36:23 +09005131 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09005132 *
5133 * LOCKING:
5134 * None.
5135 *
5136 * RETURNS:
5137 * 1 if SCRs are accessible, 0 otherwise.
5138 */
Tejun Heo936fd732007-08-06 18:36:23 +09005139int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005140{
Tejun Heo936fd732007-08-06 18:36:23 +09005141 struct ata_port *ap = link->ap;
5142
Tejun Heoa16abc02007-05-21 18:33:47 +02005143 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005144}
5145
5146/**
5147 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005148 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005149 * @reg: SCR to read
5150 * @val: Place to store read value
5151 *
Tejun Heo936fd732007-08-06 18:36:23 +09005152 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a32007-09-23 13:19:54 +09005153 * guaranteed to succeed if @link is ap->link, the cable type of
5154 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005155 *
5156 * LOCKING:
Tejun Heo633273a32007-09-23 13:19:54 +09005157 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005158 *
5159 * RETURNS:
5160 * 0 on success, negative errno on failure.
5161 */
Tejun Heo936fd732007-08-06 18:36:23 +09005162int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005163{
Tejun Heo633273a32007-09-23 13:19:54 +09005164 if (ata_is_host_link(link)) {
Tejun Heo633273a32007-09-23 13:19:54 +09005165 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005166 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a32007-09-23 13:19:54 +09005167 return -EOPNOTSUPP;
5168 }
5169
5170 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005171}
5172
5173/**
5174 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005175 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005176 * @reg: SCR to write
5177 * @val: value to write
5178 *
Tejun Heo936fd732007-08-06 18:36:23 +09005179 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a32007-09-23 13:19:54 +09005180 * guaranteed to succeed if @link is ap->link, the cable type of
5181 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005182 *
5183 * LOCKING:
Tejun Heo633273a32007-09-23 13:19:54 +09005184 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005185 *
5186 * RETURNS:
5187 * 0 on success, negative errno on failure.
5188 */
Tejun Heo936fd732007-08-06 18:36:23 +09005189int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005190{
Tejun Heo633273a32007-09-23 13:19:54 +09005191 if (ata_is_host_link(link)) {
Tejun Heo633273a32007-09-23 13:19:54 +09005192 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005193 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a32007-09-23 13:19:54 +09005194 return -EOPNOTSUPP;
5195 }
5196
5197 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005198}
5199
5200/**
5201 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005202 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005203 * @reg: SCR to write
5204 * @val: value to write
5205 *
5206 * This function is identical to sata_scr_write() except that this
5207 * function performs flush after writing to the register.
5208 *
5209 * LOCKING:
Tejun Heo633273a32007-09-23 13:19:54 +09005210 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005211 *
5212 * RETURNS:
5213 * 0 on success, negative errno on failure.
5214 */
Tejun Heo936fd732007-08-06 18:36:23 +09005215int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005216{
Tejun Heo633273a32007-09-23 13:19:54 +09005217 if (ata_is_host_link(link)) {
Tejun Heo633273a32007-09-23 13:19:54 +09005218 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005219
Tejun Heo633273a32007-09-23 13:19:54 +09005220 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005221 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a32007-09-23 13:19:54 +09005222 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005223 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a32007-09-23 13:19:54 +09005224 return rc;
5225 }
5226 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005227 }
Tejun Heo633273a32007-09-23 13:19:54 +09005228
5229 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005230}
5231
5232/**
Tejun Heob1c72912008-07-31 17:02:43 +09005233 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005234 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005235 *
Tejun Heo936fd732007-08-06 18:36:23 +09005236 * Test whether @link is online. Note that this function returns
5237 * 0 if online status of @link cannot be obtained, so
5238 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005239 *
5240 * LOCKING:
5241 * None.
5242 *
5243 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005244 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005245 */
Tejun Heob1c72912008-07-31 17:02:43 +09005246bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005247{
5248 u32 sstatus;
5249
Tejun Heo936fd732007-08-06 18:36:23 +09005250 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005251 ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005252 return true;
5253 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005254}
5255
5256/**
Tejun Heob1c72912008-07-31 17:02:43 +09005257 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005258 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005259 *
Tejun Heo936fd732007-08-06 18:36:23 +09005260 * Test whether @link is offline. Note that this function
5261 * returns 0 if offline status of @link cannot be obtained, so
5262 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005263 *
5264 * LOCKING:
5265 * None.
5266 *
5267 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005268 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005269 */
Tejun Heob1c72912008-07-31 17:02:43 +09005270bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005271{
5272 u32 sstatus;
5273
Tejun Heo936fd732007-08-06 18:36:23 +09005274 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005275 !ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005276 return true;
5277 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005278}
Edward Falk0baab862005-06-02 18:17:13 -04005279
Tejun Heob1c72912008-07-31 17:02:43 +09005280/**
5281 * ata_link_online - test whether the given link is online
5282 * @link: ATA link to test
5283 *
5284 * Test whether @link is online. This is identical to
5285 * ata_phys_link_online() when there's no slave link. When
5286 * there's a slave link, this function should only be called on
5287 * the master link and will return true if any of M/S links is
5288 * online.
5289 *
5290 * LOCKING:
5291 * None.
5292 *
5293 * RETURNS:
5294 * True if the port online status is available and online.
5295 */
5296bool ata_link_online(struct ata_link *link)
5297{
5298 struct ata_link *slave = link->ap->slave_link;
5299
5300 WARN_ON(link == slave); /* shouldn't be called on slave link */
5301
5302 return ata_phys_link_online(link) ||
5303 (slave && ata_phys_link_online(slave));
5304}
5305
5306/**
5307 * ata_link_offline - test whether the given link is offline
5308 * @link: ATA link to test
5309 *
5310 * Test whether @link is offline. This is identical to
5311 * ata_phys_link_offline() when there's no slave link. When
5312 * there's a slave link, this function should only be called on
5313 * the master link and will return true if both M/S links are
5314 * offline.
5315 *
5316 * LOCKING:
5317 * None.
5318 *
5319 * RETURNS:
5320 * True if the port offline status is available and offline.
5321 */
5322bool ata_link_offline(struct ata_link *link)
5323{
5324 struct ata_link *slave = link->ap->slave_link;
5325
5326 WARN_ON(link == slave); /* shouldn't be called on slave link */
5327
5328 return ata_phys_link_offline(link) &&
5329 (!slave || ata_phys_link_offline(slave));
5330}
5331
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005332#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04005333static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5334 unsigned int action, unsigned int ehi_flags,
5335 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005336{
5337 unsigned long flags;
5338 int i, rc;
5339
Jeff Garzikcca39742006-08-24 03:19:22 -04005340 for (i = 0; i < host->n_ports; i++) {
5341 struct ata_port *ap = host->ports[i];
Tejun Heoe3667eb2007-08-06 18:36:24 +09005342 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005343
5344 /* Previous resume operation might still be in
5345 * progress. Wait for PM_PENDING to clear.
5346 */
5347 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5348 ata_port_wait_eh(ap);
5349 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5350 }
5351
5352 /* request PM ops to EH */
5353 spin_lock_irqsave(ap->lock, flags);
5354
5355 ap->pm_mesg = mesg;
5356 if (wait) {
5357 rc = 0;
5358 ap->pm_result = &rc;
5359 }
5360
5361 ap->pflags |= ATA_PFLAG_PM_PENDING;
Tejun Heo1eca4362008-11-03 20:03:17 +09005362 ata_for_each_link(link, ap, HOST_FIRST) {
Tejun Heoe3667eb2007-08-06 18:36:24 +09005363 link->eh_info.action |= action;
5364 link->eh_info.flags |= ehi_flags;
5365 }
Tejun Heo500530f2006-07-03 16:07:27 +09005366
5367 ata_port_schedule_eh(ap);
5368
5369 spin_unlock_irqrestore(ap->lock, flags);
5370
5371 /* wait and check result */
5372 if (wait) {
5373 ata_port_wait_eh(ap);
5374 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5375 if (rc)
5376 return rc;
5377 }
5378 }
5379
5380 return 0;
5381}
5382
5383/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005384 * ata_host_suspend - suspend host
5385 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005386 * @mesg: PM message
5387 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005388 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005389 * function requests EH to perform PM operations and waits for EH
5390 * to finish.
5391 *
5392 * LOCKING:
5393 * Kernel thread context (may sleep).
5394 *
5395 * RETURNS:
5396 * 0 on success, -errno on failure.
5397 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005398int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005399{
Tejun Heo9666f402007-05-04 21:27:47 +02005400 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005401
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005402 /*
5403 * disable link pm on all ports before requesting
5404 * any pm activity
5405 */
5406 ata_lpm_enable(host);
5407
Jeff Garzikcca39742006-08-24 03:19:22 -04005408 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005409 if (rc == 0)
5410 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005411 return rc;
5412}
5413
5414/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005415 * ata_host_resume - resume host
5416 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005417 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005418 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005419 * function requests EH to perform PM operations and returns.
5420 * Note that all resume operations are performed parallely.
5421 *
5422 * LOCKING:
5423 * Kernel thread context (may sleep).
5424 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005425void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005426{
Tejun Heocf480622008-01-24 00:05:14 +09005427 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
Jeff Garzikcca39742006-08-24 03:19:22 -04005428 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005429 host->dev->power.power_state = PMSG_ON;
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005430
5431 /* reenable link pm */
5432 ata_lpm_disable(host);
Tejun Heo500530f2006-07-03 16:07:27 +09005433}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005434#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005435
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005436/**
5437 * ata_port_start - Set port up for dma.
5438 * @ap: Port to initialize
5439 *
5440 * Called just after data structures for each port are
5441 * initialized. Allocates space for PRD table.
5442 *
5443 * May be used as the port_start() entry in ata_port_operations.
5444 *
5445 * LOCKING:
5446 * Inherited from caller.
5447 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09005448int ata_port_start(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005449{
Brian King2f1f6102006-03-23 17:30:15 -06005450 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005451
Tejun Heof0d36ef2007-01-20 16:00:28 +09005452 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5453 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005454 if (!ap->prd)
5455 return -ENOMEM;
5456
Linus Torvalds1da177e2005-04-16 15:20:36 -07005457 return 0;
5458}
5459
Edward Falk0baab862005-06-02 18:17:13 -04005460/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005461 * ata_dev_init - Initialize an ata_device structure
5462 * @dev: Device structure to initialize
5463 *
5464 * Initialize @dev in preparation for probing.
5465 *
5466 * LOCKING:
5467 * Inherited from caller.
5468 */
5469void ata_dev_init(struct ata_device *dev)
5470{
Tejun Heob1c72912008-07-31 17:02:43 +09005471 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005472 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005473 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005474
Tejun Heob1c72912008-07-31 17:02:43 +09005475 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005476 link->sata_spd_limit = link->hw_sata_spd_limit;
5477 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005478
Tejun Heo72fa4b72006-05-31 18:27:32 +09005479 /* High bits of dev->flags are used to record warm plug
5480 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005481 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005482 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005483 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005484 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005485 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005486 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005487
Tejun Heo99cf6102009-01-29 20:31:32 +09005488 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5489 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005490 dev->pio_mask = UINT_MAX;
5491 dev->mwdma_mask = UINT_MAX;
5492 dev->udma_mask = UINT_MAX;
5493}
5494
5495/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005496 * ata_link_init - Initialize an ata_link structure
5497 * @ap: ATA port link is attached to
5498 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005499 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005500 *
5501 * Initialize @link.
5502 *
5503 * LOCKING:
5504 * Kernel thread context (may sleep)
5505 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005506void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005507{
5508 int i;
5509
5510 /* clear everything except for devices */
5511 memset(link, 0, offsetof(struct ata_link, device[0]));
5512
5513 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005514 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005515 link->active_tag = ATA_TAG_POISON;
5516 link->hw_sata_spd_limit = UINT_MAX;
5517
5518 /* can't use iterator, ap isn't initialized yet */
5519 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5520 struct ata_device *dev = &link->device[i];
5521
5522 dev->link = link;
5523 dev->devno = dev - link->device;
5524 ata_dev_init(dev);
5525 }
5526}
5527
5528/**
5529 * sata_link_init_spd - Initialize link->sata_spd_limit
5530 * @link: Link to configure sata_spd_limit for
5531 *
5532 * Initialize @link->[hw_]sata_spd_limit to the currently
5533 * configured value.
5534 *
5535 * LOCKING:
5536 * Kernel thread context (may sleep).
5537 *
5538 * RETURNS:
5539 * 0 on success, -errno on failure.
5540 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005541int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005542{
Tejun Heo33267322008-02-13 09:15:09 +09005543 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005544 int rc;
5545
Tejun Heod127ea72008-07-31 16:09:34 +09005546 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005547 if (rc)
5548 return rc;
5549
Tejun Heod127ea72008-07-31 16:09:34 +09005550 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005551 if (spd)
5552 link->hw_sata_spd_limit &= (1 << spd) - 1;
5553
Tejun Heo05944bd2008-08-13 20:19:09 +09005554 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005555
Tejun Heo4fb37a22007-08-06 18:36:23 +09005556 link->sata_spd_limit = link->hw_sata_spd_limit;
5557
5558 return 0;
5559}
5560
5561/**
Tejun Heof3187192007-04-17 23:44:07 +09005562 * ata_port_alloc - allocate and initialize basic ATA port resources
5563 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005564 *
Tejun Heof3187192007-04-17 23:44:07 +09005565 * Allocate and initialize basic ATA port resources.
5566 *
5567 * RETURNS:
5568 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005569 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005570 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005571 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005572 */
Tejun Heof3187192007-04-17 23:44:07 +09005573struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005574{
Tejun Heof3187192007-04-17 23:44:07 +09005575 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005576
Tejun Heof3187192007-04-17 23:44:07 +09005577 DPRINTK("ENTER\n");
5578
5579 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5580 if (!ap)
5581 return NULL;
5582
Tejun Heof4d6d002007-05-01 11:50:15 +02005583 ap->pflags |= ATA_PFLAG_INITIALIZING;
Jeff Garzikcca39742006-08-24 03:19:22 -04005584 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005585 ap->flags = ATA_FLAG_DISABLED;
Tejun Heof3187192007-04-17 23:44:07 +09005586 ap->print_id = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005587 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04005588 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005589 ap->dev = host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005590 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005591
5592#if defined(ATA_VERBOSE_DEBUG)
5593 /* turn on all debugging levels */
5594 ap->msg_enable = 0x00FF;
5595#elif defined(ATA_DEBUG)
5596 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 +09005597#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005598 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005599#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005600
Tejun Heo127102a2008-04-07 22:47:21 +09005601#ifdef CONFIG_ATA_SFF
Jeff Garzik442eacc2007-12-19 04:25:10 -05005602 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
Tejun Heof667fdb2008-10-20 13:11:56 +09005603#else
5604 INIT_DELAYED_WORK(&ap->port_task, NULL);
Tejun Heo127102a2008-04-07 22:47:21 +09005605#endif
David Howells65f27f32006-11-22 14:55:48 +00005606 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5607 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005608 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005609 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005610 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005611 init_timer_deferrable(&ap->fastdrain_timer);
5612 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5613 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005614
Tejun Heo838df622006-05-15 20:57:44 +09005615 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005616
Tejun Heo89898052007-08-06 18:36:23 +09005617 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005618
5619#ifdef ATA_IRQ_TRAP
5620 ap->stats.unhandled_irq = 1;
5621 ap->stats.idle_irq = 1;
5622#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005623 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005624}
5625
Tejun Heof0d36ef2007-01-20 16:00:28 +09005626static void ata_host_release(struct device *gendev, void *res)
5627{
5628 struct ata_host *host = dev_get_drvdata(gendev);
5629 int i;
5630
5631 for (i = 0; i < host->n_ports; i++) {
5632 struct ata_port *ap = host->ports[i];
5633
Tejun Heoecef7252007-04-17 23:44:06 +09005634 if (!ap)
5635 continue;
5636
Tejun Heo49114872007-04-17 23:44:06 +09005637 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005638 scsi_host_put(ap->scsi_host);
5639
Tejun Heo633273a32007-09-23 13:19:54 +09005640 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005641 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005642 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005643 host->ports[i] = NULL;
5644 }
5645
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005646 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005647}
5648
Linus Torvalds1da177e2005-04-16 15:20:36 -07005649/**
Tejun Heof3187192007-04-17 23:44:07 +09005650 * ata_host_alloc - allocate and init basic ATA host resources
5651 * @dev: generic device this host is associated with
5652 * @max_ports: maximum number of ATA ports associated with this host
5653 *
5654 * Allocate and initialize basic ATA host resources. LLD calls
5655 * this function to allocate a host, initializes it fully and
5656 * attaches it using ata_host_register().
5657 *
5658 * @max_ports ports are allocated and host->n_ports is
5659 * initialized to @max_ports. The caller is allowed to decrease
5660 * host->n_ports before calling ata_host_register(). The unused
5661 * ports will be automatically freed on registration.
5662 *
5663 * RETURNS:
5664 * Allocate ATA host on success, NULL on failure.
5665 *
5666 * LOCKING:
5667 * Inherited from calling layer (may sleep).
5668 */
5669struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5670{
5671 struct ata_host *host;
5672 size_t sz;
5673 int i;
5674
5675 DPRINTK("ENTER\n");
5676
5677 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5678 return NULL;
5679
5680 /* alloc a container for our list of ATA ports (buses) */
5681 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5682 /* alloc a container for our list of ATA ports (buses) */
5683 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5684 if (!host)
5685 goto err_out;
5686
5687 devres_add(dev, host);
5688 dev_set_drvdata(dev, host);
5689
5690 spin_lock_init(&host->lock);
5691 host->dev = dev;
5692 host->n_ports = max_ports;
5693
5694 /* allocate ports bound to this host */
5695 for (i = 0; i < max_ports; i++) {
5696 struct ata_port *ap;
5697
5698 ap = ata_port_alloc(host);
5699 if (!ap)
5700 goto err_out;
5701
5702 ap->port_no = i;
5703 host->ports[i] = ap;
5704 }
5705
5706 devres_remove_group(dev, NULL);
5707 return host;
5708
5709 err_out:
5710 devres_release_group(dev, NULL);
5711 return NULL;
5712}
5713
5714/**
Tejun Heof5cda252007-04-17 23:44:07 +09005715 * ata_host_alloc_pinfo - alloc host and init with port_info array
5716 * @dev: generic device this host is associated with
5717 * @ppi: array of ATA port_info to initialize host with
5718 * @n_ports: number of ATA ports attached to this host
5719 *
5720 * Allocate ATA host and initialize with info from @ppi. If NULL
5721 * terminated, @ppi may contain fewer entries than @n_ports. The
5722 * last entry will be used for the remaining ports.
5723 *
5724 * RETURNS:
5725 * Allocate ATA host on success, NULL on failure.
5726 *
5727 * LOCKING:
5728 * Inherited from calling layer (may sleep).
5729 */
5730struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5731 const struct ata_port_info * const * ppi,
5732 int n_ports)
5733{
5734 const struct ata_port_info *pi;
5735 struct ata_host *host;
5736 int i, j;
5737
5738 host = ata_host_alloc(dev, n_ports);
5739 if (!host)
5740 return NULL;
5741
5742 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5743 struct ata_port *ap = host->ports[i];
5744
5745 if (ppi[j])
5746 pi = ppi[j++];
5747
5748 ap->pio_mask = pi->pio_mask;
5749 ap->mwdma_mask = pi->mwdma_mask;
5750 ap->udma_mask = pi->udma_mask;
5751 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005752 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005753 ap->ops = pi->port_ops;
5754
5755 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5756 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005757 }
5758
5759 return host;
5760}
5761
Tejun Heob1c72912008-07-31 17:02:43 +09005762/**
5763 * ata_slave_link_init - initialize slave link
5764 * @ap: port to initialize slave link for
5765 *
5766 * Create and initialize slave link for @ap. This enables slave
5767 * link handling on the port.
5768 *
5769 * In libata, a port contains links and a link contains devices.
5770 * There is single host link but if a PMP is attached to it,
5771 * there can be multiple fan-out links. On SATA, there's usually
5772 * a single device connected to a link but PATA and SATA
5773 * controllers emulating TF based interface can have two - master
5774 * and slave.
5775 *
5776 * However, there are a few controllers which don't fit into this
5777 * abstraction too well - SATA controllers which emulate TF
5778 * interface with both master and slave devices but also have
5779 * separate SCR register sets for each device. These controllers
5780 * need separate links for physical link handling
5781 * (e.g. onlineness, link speed) but should be treated like a
5782 * traditional M/S controller for everything else (e.g. command
5783 * issue, softreset).
5784 *
5785 * slave_link is libata's way of handling this class of
5786 * controllers without impacting core layer too much. For
5787 * anything other than physical link handling, the default host
5788 * link is used for both master and slave. For physical link
5789 * handling, separate @ap->slave_link is used. All dirty details
5790 * are implemented inside libata core layer. From LLD's POV, the
5791 * only difference is that prereset, hardreset and postreset are
5792 * called once more for the slave link, so the reset sequence
5793 * looks like the following.
5794 *
5795 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5796 * softreset(M) -> postreset(M) -> postreset(S)
5797 *
5798 * Note that softreset is called only for the master. Softreset
5799 * resets both M/S by definition, so SRST on master should handle
5800 * both (the standard method will work just fine).
5801 *
5802 * LOCKING:
5803 * Should be called before host is registered.
5804 *
5805 * RETURNS:
5806 * 0 on success, -errno on failure.
5807 */
5808int ata_slave_link_init(struct ata_port *ap)
5809{
5810 struct ata_link *link;
5811
5812 WARN_ON(ap->slave_link);
5813 WARN_ON(ap->flags & ATA_FLAG_PMP);
5814
5815 link = kzalloc(sizeof(*link), GFP_KERNEL);
5816 if (!link)
5817 return -ENOMEM;
5818
5819 ata_link_init(ap, link, 1);
5820 ap->slave_link = link;
5821 return 0;
5822}
5823
Tejun Heo32ebbc02007-11-08 13:09:00 +09005824static void ata_host_stop(struct device *gendev, void *res)
5825{
5826 struct ata_host *host = dev_get_drvdata(gendev);
5827 int i;
5828
5829 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5830
5831 for (i = 0; i < host->n_ports; i++) {
5832 struct ata_port *ap = host->ports[i];
5833
5834 if (ap->ops->port_stop)
5835 ap->ops->port_stop(ap);
5836 }
5837
5838 if (host->ops->host_stop)
5839 host->ops->host_stop(host);
5840}
5841
Tejun Heof5cda252007-04-17 23:44:07 +09005842/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005843 * ata_finalize_port_ops - finalize ata_port_operations
5844 * @ops: ata_port_operations to finalize
5845 *
5846 * An ata_port_operations can inherit from another ops and that
5847 * ops can again inherit from another. This can go on as many
5848 * times as necessary as long as there is no loop in the
5849 * inheritance chain.
5850 *
5851 * Ops tables are finalized when the host is started. NULL or
5852 * unspecified entries are inherited from the closet ancestor
5853 * which has the method and the entry is populated with it.
5854 * After finalization, the ops table directly points to all the
5855 * methods and ->inherits is no longer necessary and cleared.
5856 *
5857 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5858 *
5859 * LOCKING:
5860 * None.
5861 */
5862static void ata_finalize_port_ops(struct ata_port_operations *ops)
5863{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305864 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005865 const struct ata_port_operations *cur;
5866 void **begin = (void **)ops;
5867 void **end = (void **)&ops->inherits;
5868 void **pp;
5869
5870 if (!ops || !ops->inherits)
5871 return;
5872
5873 spin_lock(&lock);
5874
5875 for (cur = ops->inherits; cur; cur = cur->inherits) {
5876 void **inherit = (void **)cur;
5877
5878 for (pp = begin; pp < end; pp++, inherit++)
5879 if (!*pp)
5880 *pp = *inherit;
5881 }
5882
5883 for (pp = begin; pp < end; pp++)
5884 if (IS_ERR(*pp))
5885 *pp = NULL;
5886
5887 ops->inherits = NULL;
5888
5889 spin_unlock(&lock);
5890}
5891
5892/**
Tejun Heoecef7252007-04-17 23:44:06 +09005893 * ata_host_start - start and freeze ports of an ATA host
5894 * @host: ATA host to start ports for
5895 *
5896 * Start and then freeze ports of @host. Started status is
5897 * recorded in host->flags, so this function can be called
5898 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005899 * once. If host->ops isn't initialized yet, its set to the
5900 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005901 *
5902 * LOCKING:
5903 * Inherited from calling layer (may sleep).
5904 *
5905 * RETURNS:
5906 * 0 if all ports are started successfully, -errno otherwise.
5907 */
5908int ata_host_start(struct ata_host *host)
5909{
Tejun Heo32ebbc02007-11-08 13:09:00 +09005910 int have_stop = 0;
5911 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09005912 int i, rc;
5913
5914 if (host->flags & ATA_HOST_STARTED)
5915 return 0;
5916
Tejun Heo029cfd62008-03-25 12:22:49 +09005917 ata_finalize_port_ops(host->ops);
5918
Tejun Heoecef7252007-04-17 23:44:06 +09005919 for (i = 0; i < host->n_ports; i++) {
5920 struct ata_port *ap = host->ports[i];
5921
Tejun Heo029cfd62008-03-25 12:22:49 +09005922 ata_finalize_port_ops(ap->ops);
5923
Tejun Heof3187192007-04-17 23:44:07 +09005924 if (!host->ops && !ata_port_is_dummy(ap))
5925 host->ops = ap->ops;
5926
Tejun Heo32ebbc02007-11-08 13:09:00 +09005927 if (ap->ops->port_stop)
5928 have_stop = 1;
5929 }
5930
5931 if (host->ops->host_stop)
5932 have_stop = 1;
5933
5934 if (have_stop) {
5935 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5936 if (!start_dr)
5937 return -ENOMEM;
5938 }
5939
5940 for (i = 0; i < host->n_ports; i++) {
5941 struct ata_port *ap = host->ports[i];
5942
Tejun Heoecef7252007-04-17 23:44:06 +09005943 if (ap->ops->port_start) {
5944 rc = ap->ops->port_start(ap);
5945 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00005946 if (rc != -ENODEV)
Andrew Morton0f757742008-01-10 14:33:09 -08005947 dev_printk(KERN_ERR, host->dev,
5948 "failed to start port %d "
5949 "(errno=%d)\n", i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09005950 goto err_out;
5951 }
5952 }
Tejun Heoecef7252007-04-17 23:44:06 +09005953 ata_eh_freeze_port(ap);
5954 }
5955
Tejun Heo32ebbc02007-11-08 13:09:00 +09005956 if (start_dr)
5957 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005958 host->flags |= ATA_HOST_STARTED;
5959 return 0;
5960
5961 err_out:
5962 while (--i >= 0) {
5963 struct ata_port *ap = host->ports[i];
5964
5965 if (ap->ops->port_stop)
5966 ap->ops->port_stop(ap);
5967 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09005968 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005969 return rc;
5970}
5971
5972/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005973 * ata_sas_host_init - Initialize a host struct
5974 * @host: host to initialize
5975 * @dev: device host is attached to
5976 * @flags: host flags
5977 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005978 *
5979 * LOCKING:
5980 * PCI/etc. bus probe sem.
5981 *
5982 */
Tejun Heof3187192007-04-17 23:44:07 +09005983/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04005984void ata_host_init(struct ata_host *host, struct device *dev,
Tejun Heo029cfd62008-03-25 12:22:49 +09005985 unsigned long flags, struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005986{
Jeff Garzikcca39742006-08-24 03:19:22 -04005987 spin_lock_init(&host->lock);
5988 host->dev = dev;
5989 host->flags = flags;
5990 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005991}
5992
Arjan van de Ven79318052009-01-04 05:32:28 -08005993
5994static void async_port_probe(void *data, async_cookie_t cookie)
5995{
5996 int rc;
5997 struct ata_port *ap = data;
Arjan van de Ven886ad092009-01-09 15:54:07 -08005998
5999 /*
6000 * If we're not allowed to scan this host in parallel,
6001 * we need to wait until all previous scans have completed
6002 * before going further.
Arjan van de Venfa853a42009-01-10 10:18:44 -08006003 * Jeff Garzik says this is only within a controller, so we
6004 * don't need to wait for port 0, only for later ports.
Arjan van de Ven886ad092009-01-09 15:54:07 -08006005 */
Arjan van de Venfa853a42009-01-10 10:18:44 -08006006 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
Arjan van de Ven886ad092009-01-09 15:54:07 -08006007 async_synchronize_cookie(cookie);
6008
Arjan van de Ven79318052009-01-04 05:32:28 -08006009 /* probe */
6010 if (ap->ops->error_handler) {
6011 struct ata_eh_info *ehi = &ap->link.eh_info;
6012 unsigned long flags;
6013
6014 ata_port_probe(ap);
6015
6016 /* kick EH for boot probing */
6017 spin_lock_irqsave(ap->lock, flags);
6018
6019 ehi->probe_mask |= ATA_ALL_DEVICES;
6020 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
6021 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6022
6023 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6024 ap->pflags |= ATA_PFLAG_LOADING;
6025 ata_port_schedule_eh(ap);
6026
6027 spin_unlock_irqrestore(ap->lock, flags);
6028
6029 /* wait for EH to finish */
6030 ata_port_wait_eh(ap);
6031 } else {
6032 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6033 rc = ata_bus_probe(ap);
6034 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6035
6036 if (rc) {
6037 /* FIXME: do something useful here?
6038 * Current libata behavior will
6039 * tear down everything when
6040 * the module is removed
6041 * or the h/w is unplugged.
6042 */
6043 }
6044 }
Arjan van de Venf29d3b22009-01-05 15:07:07 -08006045
6046 /* in order to keep device order, we need to synchronize at this point */
6047 async_synchronize_cookie(cookie);
6048
6049 ata_scsi_scan_host(ap, 1);
6050
Arjan van de Ven79318052009-01-04 05:32:28 -08006051}
Brian Kingb03732f2006-08-07 14:27:10 -05006052/**
Tejun Heof3187192007-04-17 23:44:07 +09006053 * ata_host_register - register initialized ATA host
6054 * @host: ATA host to register
6055 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04006056 *
Tejun Heof3187192007-04-17 23:44:07 +09006057 * Register initialized ATA host. @host is allocated using
6058 * ata_host_alloc() and fully initialized by LLD. This function
6059 * starts ports, registers @host with ATA and SCSI layers and
6060 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006061 *
6062 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006063 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006064 *
6065 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09006066 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006067 */
Tejun Heof3187192007-04-17 23:44:07 +09006068int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006069{
Tejun Heof3187192007-04-17 23:44:07 +09006070 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006071
Tejun Heof3187192007-04-17 23:44:07 +09006072 /* host must have been started */
6073 if (!(host->flags & ATA_HOST_STARTED)) {
6074 dev_printk(KERN_ERR, host->dev,
6075 "BUG: trying to register unstarted host\n");
6076 WARN_ON(1);
6077 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01006078 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09006079
Tejun Heof3187192007-04-17 23:44:07 +09006080 /* Blow away unused ports. This happens when LLD can't
6081 * determine the exact number of ports to allocate at
6082 * allocation time.
6083 */
6084 for (i = host->n_ports; host->ports[i]; i++)
6085 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006086
Tejun Heof3187192007-04-17 23:44:07 +09006087 /* give ports names and add SCSI hosts */
6088 for (i = 0; i < host->n_ports; i++)
6089 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09006090
Tejun Heof3187192007-04-17 23:44:07 +09006091 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09006092 if (rc)
Tejun Heof3187192007-04-17 23:44:07 +09006093 return rc;
Tejun Heoecef7252007-04-17 23:44:06 +09006094
Tejun Heofafbae82007-05-15 03:28:16 +09006095 /* associate with ACPI nodes */
6096 ata_acpi_associate(host);
6097
Tejun Heof3187192007-04-17 23:44:07 +09006098 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04006099 for (i = 0; i < host->n_ports; i++) {
6100 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09006101 unsigned long xfer_mask;
6102
6103 /* set SATA cable type if still unset */
6104 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6105 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006106
Tejun Heo5a04bf42006-05-31 18:27:38 +09006107 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09006108 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09006109 if (ap->slave_link)
6110 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09006111
Tejun Heocbcdd872007-08-18 13:14:55 +09006112 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09006113 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6114 ap->udma_mask);
6115
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006116 if (!ata_port_is_dummy(ap)) {
Tejun Heocbcdd872007-08-18 13:14:55 +09006117 ata_port_printk(ap, KERN_INFO,
6118 "%cATA max %s %s\n",
Tejun Heoa16abc02007-05-21 18:33:47 +02006119 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
Tejun Heof3187192007-04-17 23:44:07 +09006120 ata_mode_string(xfer_mask),
Tejun Heocbcdd872007-08-18 13:14:55 +09006121 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006122 ata_ehi_clear_desc(&ap->link.eh_info);
6123 } else
Tejun Heof3187192007-04-17 23:44:07 +09006124 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6125 }
6126
Vegard Nossumf6005352009-04-08 18:19:39 +02006127 /* perform each probe asynchronously */
Tejun Heof3187192007-04-17 23:44:07 +09006128 for (i = 0; i < host->n_ports; i++) {
6129 struct ata_port *ap = host->ports[i];
Arjan van de Ven79318052009-01-04 05:32:28 -08006130 async_schedule(async_port_probe, ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006131 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006132
Tejun Heof3187192007-04-17 23:44:07 +09006133 return 0;
6134}
6135
6136/**
Tejun Heof5cda252007-04-17 23:44:07 +09006137 * ata_host_activate - start host, request IRQ and register it
6138 * @host: target ATA host
6139 * @irq: IRQ to request
6140 * @irq_handler: irq_handler used when requesting IRQ
6141 * @irq_flags: irq_flags used when requesting IRQ
6142 * @sht: scsi_host_template to use when registering the host
6143 *
6144 * After allocating an ATA host and initializing it, most libata
6145 * LLDs perform three steps to activate the host - start host,
6146 * request IRQ and register it. This helper takes necessasry
6147 * arguments and performs the three steps in one go.
6148 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006149 * An invalid IRQ skips the IRQ registration and expects the host to
6150 * have set polling mode on the port. In this case, @irq_handler
6151 * should be NULL.
6152 *
Tejun Heof5cda252007-04-17 23:44:07 +09006153 * LOCKING:
6154 * Inherited from calling layer (may sleep).
6155 *
6156 * RETURNS:
6157 * 0 on success, -errno otherwise.
6158 */
6159int ata_host_activate(struct ata_host *host, int irq,
6160 irq_handler_t irq_handler, unsigned long irq_flags,
6161 struct scsi_host_template *sht)
6162{
Tejun Heocbcdd872007-08-18 13:14:55 +09006163 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006164
6165 rc = ata_host_start(host);
6166 if (rc)
6167 return rc;
6168
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006169 /* Special case for polling mode */
6170 if (!irq) {
6171 WARN_ON(irq_handler);
6172 return ata_host_register(host, sht);
6173 }
6174
Tejun Heof5cda252007-04-17 23:44:07 +09006175 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6176 dev_driver_string(host->dev), host);
6177 if (rc)
6178 return rc;
6179
Tejun Heocbcdd872007-08-18 13:14:55 +09006180 for (i = 0; i < host->n_ports; i++)
6181 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006182
Tejun Heof5cda252007-04-17 23:44:07 +09006183 rc = ata_host_register(host, sht);
6184 /* if failed, just free the IRQ and leave ports alone */
6185 if (rc)
6186 devm_free_irq(host->dev, irq, host);
6187
6188 return rc;
6189}
6190
6191/**
Tejun Heo720ba122006-05-31 18:28:13 +09006192 * ata_port_detach - Detach ATA port in prepration of device removal
6193 * @ap: ATA port to be detached
6194 *
6195 * Detach all ATA devices and the associated SCSI devices of @ap;
6196 * then, remove the associated SCSI host. @ap is guaranteed to
6197 * be quiescent on return from this function.
6198 *
6199 * LOCKING:
6200 * Kernel thread context (may sleep).
6201 */
Adrian Bunk741b7762007-10-24 18:23:06 +02006202static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09006203{
6204 unsigned long flags;
Tejun Heo720ba122006-05-31 18:28:13 +09006205
6206 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006207 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006208
6209 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006210 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006211 ap->pflags |= ATA_PFLAG_UNLOADING;
Tejun Heoece180d2008-11-03 20:04:37 +09006212 ata_port_schedule_eh(ap);
Jeff Garzikba6a1302006-06-22 23:46:10 -04006213 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006214
Tejun Heoece180d2008-11-03 20:04:37 +09006215 /* wait till EH commits suicide */
Tejun Heo720ba122006-05-31 18:28:13 +09006216 ata_port_wait_eh(ap);
6217
Tejun Heoece180d2008-11-03 20:04:37 +09006218 /* it better be dead now */
6219 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
Tejun Heo720ba122006-05-31 18:28:13 +09006220
Oleg Nesterov45a66c12007-07-09 11:46:13 -07006221 cancel_rearming_delayed_work(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006222
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006223 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09006224 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006225 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006226}
6227
6228/**
Tejun Heo0529c152007-01-20 16:00:26 +09006229 * ata_host_detach - Detach all ports of an ATA host
6230 * @host: Host to detach
6231 *
6232 * Detach all ports of @host.
6233 *
6234 * LOCKING:
6235 * Kernel thread context (may sleep).
6236 */
6237void ata_host_detach(struct ata_host *host)
6238{
6239 int i;
6240
6241 for (i = 0; i < host->n_ports; i++)
6242 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006243
6244 /* the host is dead now, dissociate ACPI */
6245 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09006246}
6247
Jeff Garzik374b1872005-08-30 05:42:52 -04006248#ifdef CONFIG_PCI
6249
Edward Falk0baab862005-06-02 18:17:13 -04006250/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006251 * ata_pci_remove_one - PCI layer callback for device removal
6252 * @pdev: PCI device that was removed
6253 *
Tejun Heob878ca52007-01-20 16:00:28 +09006254 * PCI layer indicates to libata via this hook that hot-unplug or
6255 * module unload event has occurred. Detach all ports. Resource
6256 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006257 *
6258 * LOCKING:
6259 * Inherited from PCI layer (may sleep).
6260 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006261void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006262{
Jeff Garzik28555682007-10-11 17:12:35 -04006263 struct device *dev = &pdev->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006264 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006265
Tejun Heob878ca52007-01-20 16:00:28 +09006266 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006267}
6268
6269/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006270int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006271{
6272 unsigned long tmp = 0;
6273
6274 switch (bits->width) {
6275 case 1: {
6276 u8 tmp8 = 0;
6277 pci_read_config_byte(pdev, bits->reg, &tmp8);
6278 tmp = tmp8;
6279 break;
6280 }
6281 case 2: {
6282 u16 tmp16 = 0;
6283 pci_read_config_word(pdev, bits->reg, &tmp16);
6284 tmp = tmp16;
6285 break;
6286 }
6287 case 4: {
6288 u32 tmp32 = 0;
6289 pci_read_config_dword(pdev, bits->reg, &tmp32);
6290 tmp = tmp32;
6291 break;
6292 }
6293
6294 default:
6295 return -EINVAL;
6296 }
6297
6298 tmp &= bits->mask;
6299
6300 return (tmp == bits->val) ? 1 : 0;
6301}
Jens Axboe9b847542006-01-06 09:28:07 +01006302
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006303#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006304void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006305{
6306 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006307 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006308
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006309 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006310 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006311}
6312
Tejun Heo553c4aa2006-12-26 19:39:50 +09006313int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006314{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006315 int rc;
6316
Jens Axboe9b847542006-01-06 09:28:07 +01006317 pci_set_power_state(pdev, PCI_D0);
6318 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006319
Tejun Heob878ca52007-01-20 16:00:28 +09006320 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006321 if (rc) {
6322 dev_printk(KERN_ERR, &pdev->dev,
6323 "failed to enable device after resume (%d)\n", rc);
6324 return rc;
6325 }
6326
Jens Axboe9b847542006-01-06 09:28:07 +01006327 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006328 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006329}
6330
Tejun Heo3c5100c2006-07-26 16:58:33 +09006331int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006332{
Jeff Garzikcca39742006-08-24 03:19:22 -04006333 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006334 int rc = 0;
6335
Jeff Garzikcca39742006-08-24 03:19:22 -04006336 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006337 if (rc)
6338 return rc;
6339
Tejun Heo3c5100c2006-07-26 16:58:33 +09006340 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006341
6342 return 0;
6343}
6344
6345int ata_pci_device_resume(struct pci_dev *pdev)
6346{
Jeff Garzikcca39742006-08-24 03:19:22 -04006347 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006348 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006349
Tejun Heo553c4aa2006-12-26 19:39:50 +09006350 rc = ata_pci_device_do_resume(pdev);
6351 if (rc == 0)
6352 ata_host_resume(host);
6353 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006354}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006355#endif /* CONFIG_PM */
6356
Linus Torvalds1da177e2005-04-16 15:20:36 -07006357#endif /* CONFIG_PCI */
6358
Tejun Heo33267322008-02-13 09:15:09 +09006359static int __init ata_parse_force_one(char **cur,
6360 struct ata_force_ent *force_ent,
6361 const char **reason)
6362{
6363 /* FIXME: Currently, there's no way to tag init const data and
6364 * using __initdata causes build failure on some versions of
6365 * gcc. Once __initdataconst is implemented, add const to the
6366 * following structure.
6367 */
6368 static struct ata_force_param force_tbl[] __initdata = {
6369 { "40c", .cbl = ATA_CBL_PATA40 },
6370 { "80c", .cbl = ATA_CBL_PATA80 },
6371 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6372 { "unk", .cbl = ATA_CBL_PATA_UNK },
6373 { "ign", .cbl = ATA_CBL_PATA_IGN },
6374 { "sata", .cbl = ATA_CBL_SATA },
6375 { "1.5Gbps", .spd_limit = 1 },
6376 { "3.0Gbps", .spd_limit = 2 },
6377 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6378 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6379 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6380 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6381 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6382 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6383 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6384 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6385 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6386 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6387 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6388 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6389 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6390 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6391 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6392 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6393 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6394 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6395 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6396 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6397 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6398 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6399 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6400 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6401 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6402 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6403 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6404 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6405 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6406 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6407 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6408 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6409 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6410 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6411 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6412 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006413 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6414 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6415 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Tejun Heo33267322008-02-13 09:15:09 +09006416 };
6417 char *start = *cur, *p = *cur;
6418 char *id, *val, *endp;
6419 const struct ata_force_param *match_fp = NULL;
6420 int nr_matches = 0, i;
6421
6422 /* find where this param ends and update *cur */
6423 while (*p != '\0' && *p != ',')
6424 p++;
6425
6426 if (*p == '\0')
6427 *cur = p;
6428 else
6429 *cur = p + 1;
6430
6431 *p = '\0';
6432
6433 /* parse */
6434 p = strchr(start, ':');
6435 if (!p) {
6436 val = strstrip(start);
6437 goto parse_val;
6438 }
6439 *p = '\0';
6440
6441 id = strstrip(start);
6442 val = strstrip(p + 1);
6443
6444 /* parse id */
6445 p = strchr(id, '.');
6446 if (p) {
6447 *p++ = '\0';
6448 force_ent->device = simple_strtoul(p, &endp, 10);
6449 if (p == endp || *endp != '\0') {
6450 *reason = "invalid device";
6451 return -EINVAL;
6452 }
6453 }
6454
6455 force_ent->port = simple_strtoul(id, &endp, 10);
6456 if (p == endp || *endp != '\0') {
6457 *reason = "invalid port/link";
6458 return -EINVAL;
6459 }
6460
6461 parse_val:
6462 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6463 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6464 const struct ata_force_param *fp = &force_tbl[i];
6465
6466 if (strncasecmp(val, fp->name, strlen(val)))
6467 continue;
6468
6469 nr_matches++;
6470 match_fp = fp;
6471
6472 if (strcasecmp(val, fp->name) == 0) {
6473 nr_matches = 1;
6474 break;
6475 }
6476 }
6477
6478 if (!nr_matches) {
6479 *reason = "unknown value";
6480 return -EINVAL;
6481 }
6482 if (nr_matches > 1) {
6483 *reason = "ambigious value";
6484 return -EINVAL;
6485 }
6486
6487 force_ent->param = *match_fp;
6488
6489 return 0;
6490}
6491
6492static void __init ata_parse_force_param(void)
6493{
6494 int idx = 0, size = 1;
6495 int last_port = -1, last_device = -1;
6496 char *p, *cur, *next;
6497
6498 /* calculate maximum number of params and allocate force_tbl */
6499 for (p = ata_force_param_buf; *p; p++)
6500 if (*p == ',')
6501 size++;
6502
6503 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6504 if (!ata_force_tbl) {
6505 printk(KERN_WARNING "ata: failed to extend force table, "
6506 "libata.force ignored\n");
6507 return;
6508 }
6509
6510 /* parse and populate the table */
6511 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6512 const char *reason = "";
6513 struct ata_force_ent te = { .port = -1, .device = -1 };
6514
6515 next = cur;
6516 if (ata_parse_force_one(&next, &te, &reason)) {
6517 printk(KERN_WARNING "ata: failed to parse force "
6518 "parameter \"%s\" (%s)\n",
6519 cur, reason);
6520 continue;
6521 }
6522
6523 if (te.port == -1) {
6524 te.port = last_port;
6525 te.device = last_device;
6526 }
6527
6528 ata_force_tbl[idx++] = te;
6529
6530 last_port = te.port;
6531 last_device = te.device;
6532 }
6533
6534 ata_force_tbl_size = idx;
6535}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006536
Linus Torvalds1da177e2005-04-16 15:20:36 -07006537static int __init ata_init(void)
6538{
Tejun Heo33267322008-02-13 09:15:09 +09006539 ata_parse_force_param();
6540
Linus Torvalds1da177e2005-04-16 15:20:36 -07006541 ata_wq = create_workqueue("ata");
6542 if (!ata_wq)
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006543 goto free_force_tbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006544
Tejun Heo453b07a2006-05-31 18:27:42 +09006545 ata_aux_wq = create_singlethread_workqueue("ata_aux");
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006546 if (!ata_aux_wq)
6547 goto free_wq;
Tejun Heo453b07a2006-05-31 18:27:42 +09006548
Linus Torvalds1da177e2005-04-16 15:20:36 -07006549 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6550 return 0;
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006551
6552free_wq:
6553 destroy_workqueue(ata_wq);
6554free_force_tbl:
6555 kfree(ata_force_tbl);
6556 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006557}
6558
6559static void __exit ata_exit(void)
6560{
Tejun Heo33267322008-02-13 09:15:09 +09006561 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006562 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09006563 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006564}
6565
Brian Kinga4625082006-11-13 16:32:36 -06006566subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006567module_exit(ata_exit);
6568
Jeff Garzik67846b32005-10-05 02:58:32 -04006569static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07006570static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04006571
6572int ata_ratelimit(void)
6573{
6574 int rc;
6575 unsigned long flags;
6576
6577 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6578
6579 if (time_after(jiffies, ratelimit_time)) {
6580 rc = 1;
6581 ratelimit_time = jiffies + (HZ/5);
6582 } else
6583 rc = 0;
6584
6585 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6586
6587 return rc;
6588}
6589
Tejun Heoc22daff2006-04-11 22:22:29 +09006590/**
6591 * ata_wait_register - wait until register value changes
6592 * @reg: IO-mapped register
6593 * @mask: Mask to apply to read register value
6594 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006595 * @interval: polling interval in milliseconds
6596 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006597 *
6598 * Waiting for some bits of register to change is a common
6599 * operation for ATA controllers. This function reads 32bit LE
6600 * IO-mapped register @reg and tests for the following condition.
6601 *
6602 * (*@reg & mask) != val
6603 *
6604 * If the condition is met, it returns; otherwise, the process is
6605 * repeated after @interval_msec until timeout.
6606 *
6607 * LOCKING:
6608 * Kernel thread context (may sleep)
6609 *
6610 * RETURNS:
6611 * The final register value.
6612 */
6613u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006614 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006615{
Tejun Heo341c2c92008-05-20 02:17:51 +09006616 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006617 u32 tmp;
6618
6619 tmp = ioread32(reg);
6620
6621 /* Calculate timeout _after_ the first read to make sure
6622 * preceding writes reach the controller before starting to
6623 * eat away the timeout.
6624 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006625 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006626
Tejun Heo341c2c92008-05-20 02:17:51 +09006627 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6628 msleep(interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006629 tmp = ioread32(reg);
6630 }
6631
6632 return tmp;
6633}
6634
Linus Torvalds1da177e2005-04-16 15:20:36 -07006635/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006636 * Dummy port_ops
6637 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006638static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6639{
6640 return AC_ERR_SYSTEM;
6641}
6642
Tejun Heo182d7bb2008-04-07 22:47:21 +09006643static void ata_dummy_error_handler(struct ata_port *ap)
6644{
6645 /* truly dummy */
6646}
6647
Tejun Heo029cfd62008-03-25 12:22:49 +09006648struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006649 .qc_prep = ata_noop_qc_prep,
6650 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006651 .error_handler = ata_dummy_error_handler,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006652};
6653
Tejun Heo21b0ad42007-04-17 23:44:07 +09006654const struct ata_port_info ata_dummy_port_info = {
6655 .port_ops = &ata_dummy_port_ops,
6656};
6657
Tejun Heodd5b06c2006-08-10 16:59:12 +09006658/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006659 * libata is essentially a library of internal helper functions for
6660 * low-level ATA host controller drivers. As such, the API/ABI is
6661 * likely to change as new drivers are added and updated.
6662 * Do not depend on ABI/API stability.
6663 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006664EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6665EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6666EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006667EXPORT_SYMBOL_GPL(ata_base_port_ops);
6668EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006669EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006670EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heo1eca4362008-11-03 20:03:17 +09006671EXPORT_SYMBOL_GPL(ata_link_next);
6672EXPORT_SYMBOL_GPL(ata_dev_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006673EXPORT_SYMBOL_GPL(ata_std_bios_param);
Jeff Garzikcca39742006-08-24 03:19:22 -04006674EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006675EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006676EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006677EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006678EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006679EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006680EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09006681EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006682EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006683EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006684EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006685EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006686EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6687EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006688EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6689EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6690EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6691EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6692EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6693EXPORT_SYMBOL_GPL(ata_mode_string);
6694EXPORT_SYMBOL_GPL(ata_id_xfermask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006695EXPORT_SYMBOL_GPL(ata_port_start);
Alan04351822007-03-06 02:37:52 -08006696EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006697EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006698EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006699EXPORT_SYMBOL_GPL(ata_port_probe);
Alan10305f02007-02-20 18:01:59 +00006700EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006701EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006702EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006703EXPORT_SYMBOL_GPL(sata_link_debounce);
6704EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo0aa11132008-04-07 22:47:18 +09006705EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006706EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006707EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006708EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006709EXPORT_SYMBOL_GPL(ata_dev_classify);
6710EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006711EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04006712EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09006713EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006714EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006715EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006716EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006717EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006718EXPORT_SYMBOL_GPL(sata_scr_valid);
6719EXPORT_SYMBOL_GPL(sata_scr_read);
6720EXPORT_SYMBOL_GPL(sata_scr_write);
6721EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006722EXPORT_SYMBOL_GPL(ata_link_online);
6723EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006724#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006725EXPORT_SYMBOL_GPL(ata_host_suspend);
6726EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006727#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006728EXPORT_SYMBOL_GPL(ata_id_string);
6729EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006730EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006731EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6732
Mark Lord1a6601642009-02-25 15:18:32 -05006733EXPORT_SYMBOL_GPL(ata_pio_queue_task);
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006734EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006735EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006736EXPORT_SYMBOL_GPL(ata_timing_compute);
6737EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006738EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006739
Linus Torvalds1da177e2005-04-16 15:20:36 -07006740#ifdef CONFIG_PCI
6741EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006742EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006743#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006744EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6745EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006746EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6747EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006748#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006749#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006750
Tejun Heob64bbc32007-07-16 14:29:39 +09006751EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6752EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6753EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09006754EXPORT_SYMBOL_GPL(ata_port_desc);
6755#ifdef CONFIG_PCI
6756EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6757#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09006758EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09006759EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006760EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006761EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09006762EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09006763EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6764EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006765EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6766EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04006767EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09006768EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09006769EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006770
6771EXPORT_SYMBOL_GPL(ata_cable_40wire);
6772EXPORT_SYMBOL_GPL(ata_cable_80wire);
6773EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09006774EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006775EXPORT_SYMBOL_GPL(ata_cable_sata);