blob: 46cd3f4c6aaaf8122c82ea8f60f7e6bcbaf435c6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Alan Cox92c52c52007-11-19 14:30:16 +000033 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
40 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/kernel.h>
44#include <linux/module.h>
45#include <linux/pci.h>
46#include <linux/init.h>
47#include <linux/list.h>
48#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/spinlock.h>
50#include <linux/blkdev.h>
51#include <linux/delay.h>
52#include <linux/timer.h>
53#include <linux/interrupt.h>
54#include <linux/completion.h>
55#include <linux/suspend.h>
56#include <linux/workqueue.h>
David Hardeman378f0582005-09-17 17:55:31 +100057#include <linux/scatterlist.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040058#include <linux/io.h>
Arjan van de Ven79318052009-01-04 05:32:28 -080059#include <linux/async.h>
Mark Lorde18086d2009-03-19 13:32:21 -040060#include <linux/log2.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090061#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050063#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <scsi/scsi_host.h>
65#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#include <asm/byteorder.h>
Tejun Heo140b5e592007-12-12 12:21:52 +090067#include <linux/cdrom.h>
Akinobu Mita9990b6f2010-04-12 21:11:41 +090068#include <linux/ratelimit.h>
Lin Ming9ee4f392011-12-05 09:20:28 +080069#include <linux/pm_runtime.h>
Brian Norrisb7db04d2012-11-02 12:29:32 -070070#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72#include "libata.h"
Gwendal Grignoud9027472010-05-25 12:31:38 -070073#include "libata-transport.h"
Jeff Garzikfda0efc2007-01-31 07:43:15 -050074
Tejun Heod7bb4cc2006-05-31 18:27:46 +090075/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090076const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
77const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
78const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090079
Tejun Heo029cfd62008-03-25 12:22:49 +090080const struct ata_port_operations ata_base_port_ops = {
Tejun Heo0aa11132008-04-07 22:47:18 +090081 .prereset = ata_std_prereset,
Tejun Heo203c75b2008-04-07 22:47:18 +090082 .postreset = ata_std_postreset,
Tejun Heoa1efdab2008-03-25 12:22:50 +090083 .error_handler = ata_std_error_handler,
Dan Williamse4a9c372012-06-21 23:25:27 -070084 .sched_eh = ata_std_sched_eh,
85 .end_eh = ata_std_end_eh,
Tejun Heo029cfd62008-03-25 12:22:49 +090086};
87
88const struct ata_port_operations sata_port_ops = {
89 .inherits = &ata_base_port_ops,
90
91 .qc_defer = ata_std_qc_defer,
Tejun Heo57c9efd2008-04-07 22:47:19 +090092 .hardreset = sata_std_hardreset,
Tejun Heo029cfd62008-03-25 12:22:49 +090093};
94
Tejun Heo3373efd2006-05-15 20:57:53 +090095static unsigned int ata_dev_init_params(struct ata_device *dev,
96 u16 heads, u16 sectors);
97static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
98static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090099static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Tero Roponena78f57a2012-04-22 11:38:00 +0300101atomic_t ata_print_id = ATOMIC_INIT(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Tejun Heo33267322008-02-13 09:15:09 +0900103struct ata_force_param {
104 const char *name;
105 unsigned int cbl;
106 int spd_limit;
107 unsigned long xfer_mask;
108 unsigned int horkage_on;
109 unsigned int horkage_off;
Tejun Heo05944bd2008-08-13 20:19:09 +0900110 unsigned int lflags;
Tejun Heo33267322008-02-13 09:15:09 +0900111};
112
113struct ata_force_ent {
114 int port;
115 int device;
116 struct ata_force_param param;
117};
118
119static struct ata_force_ent *ata_force_tbl;
120static int ata_force_tbl_size;
121
122static char ata_force_param_buf[PAGE_SIZE] __initdata;
Tejun Heo7afb4222008-03-09 20:21:53 +0900123/* param_buf is thrown away after initialization, disallow read */
124module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
Tejun Heo33267322008-02-13 09:15:09 +0900125MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
126
Tejun Heo2486fa52008-07-31 07:52:40 +0900127static int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -0400128module_param(atapi_enabled, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200129MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
Jeff Garzik1623c812005-08-30 03:37:42 -0400130
Adrian Bunkc5c61bd2008-02-25 02:07:25 +0200131static int atapi_dmadir = 0;
Albert Lee95de7192006-04-04 10:57:18 +0800132module_param(atapi_dmadir, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200133MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
Albert Lee95de7192006-04-04 10:57:18 +0800134
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900135int atapi_passthru16 = 1;
136module_param(atapi_passthru16, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200137MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900138
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500139int libata_fua = 0;
140module_param_named(fua, libata_fua, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200141MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500142
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400143static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100144module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
145MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
146
Alan Coxb3a70602007-10-02 12:38:26 -0400147static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
148module_param_named(dma, libata_dma_mask, int, 0444);
149MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
150
Tejun Heo87fbc5a2008-05-20 02:17:54 +0900151static int ata_probe_timeout;
Andrew Mortona8601e52006-06-25 01:36:52 -0700152module_param(ata_probe_timeout, int, 0444);
153MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
154
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400155int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400156module_param_named(noacpi, libata_noacpi, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200157MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700158
Alan Coxae8d4ee2007-11-04 22:05:49 -0500159int libata_allow_tpm = 0;
160module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
Evgeni Golovad5d8ea2009-06-22 09:46:20 +0200161MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
Alan Coxae8d4ee2007-11-04 22:05:49 -0500162
Tejun Heoe7ecd432010-05-19 15:38:58 +0200163static int atapi_an;
164module_param(atapi_an, int, 0444);
165MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167MODULE_AUTHOR("Jeff Garzik");
168MODULE_DESCRIPTION("Library module for ATA devices");
169MODULE_LICENSE("GPL");
170MODULE_VERSION(DRV_VERSION);
171
Edward Falk0baab862005-06-02 18:17:13 -0400172
Tejun Heo9913ff82009-01-29 20:31:31 +0900173static bool ata_sstatus_online(u32 sstatus)
174{
175 return (sstatus & 0xf) == 0x3;
176}
177
Tejun Heo1eca4362008-11-03 20:03:17 +0900178/**
179 * ata_link_next - link iteration helper
180 * @link: the previous link, NULL to start
181 * @ap: ATA port containing links to iterate
182 * @mode: iteration mode, one of ATA_LITER_*
Tejun Heoaadffb62008-07-31 17:02:41 +0900183 *
Tejun Heo1eca4362008-11-03 20:03:17 +0900184 * LOCKING:
185 * Host lock or EH context.
186 *
187 * RETURNS:
188 * Pointer to the next link.
Tejun Heoaadffb62008-07-31 17:02:41 +0900189 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900190struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
191 enum ata_link_iter_mode mode)
Tejun Heoaadffb62008-07-31 17:02:41 +0900192{
Tejun Heo1eca4362008-11-03 20:03:17 +0900193 BUG_ON(mode != ATA_LITER_EDGE &&
194 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
Tejun Heoaadffb62008-07-31 17:02:41 +0900195
Tejun Heo1eca4362008-11-03 20:03:17 +0900196 /* NULL link indicates start of iteration */
197 if (!link)
198 switch (mode) {
199 case ATA_LITER_EDGE:
200 case ATA_LITER_PMP_FIRST:
201 if (sata_pmp_attached(ap))
202 return ap->pmp_link;
203 /* fall through */
204 case ATA_LITER_HOST_FIRST:
205 return &ap->link;
206 }
207
208 /* we just iterated over the host link, what's next? */
209 if (link == &ap->link)
210 switch (mode) {
211 case ATA_LITER_HOST_FIRST:
212 if (sata_pmp_attached(ap))
213 return ap->pmp_link;
214 /* fall through */
215 case ATA_LITER_PMP_FIRST:
216 if (unlikely(ap->slave_link))
Tejun Heob1c72912008-07-31 17:02:43 +0900217 return ap->slave_link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900218 /* fall through */
219 case ATA_LITER_EDGE:
Tejun Heoaadffb62008-07-31 17:02:41 +0900220 return NULL;
Tejun Heob1c72912008-07-31 17:02:43 +0900221 }
Tejun Heoaadffb62008-07-31 17:02:41 +0900222
Tejun Heob1c72912008-07-31 17:02:43 +0900223 /* slave_link excludes PMP */
224 if (unlikely(link == ap->slave_link))
225 return NULL;
226
Tejun Heo1eca4362008-11-03 20:03:17 +0900227 /* we were over a PMP link */
Tejun Heoaadffb62008-07-31 17:02:41 +0900228 if (++link < ap->pmp_link + ap->nr_pmp_links)
229 return link;
Tejun Heo1eca4362008-11-03 20:03:17 +0900230
231 if (mode == ATA_LITER_PMP_FIRST)
232 return &ap->link;
233
Tejun Heoaadffb62008-07-31 17:02:41 +0900234 return NULL;
235}
236
Edward Falk0baab862005-06-02 18:17:13 -0400237/**
Tejun Heo1eca4362008-11-03 20:03:17 +0900238 * ata_dev_next - device iteration helper
239 * @dev: the previous device, NULL to start
240 * @link: ATA link containing devices to iterate
241 * @mode: iteration mode, one of ATA_DITER_*
242 *
243 * LOCKING:
244 * Host lock or EH context.
245 *
246 * RETURNS:
247 * Pointer to the next device.
248 */
249struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
250 enum ata_dev_iter_mode mode)
251{
252 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
253 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
254
255 /* NULL dev indicates start of iteration */
256 if (!dev)
257 switch (mode) {
258 case ATA_DITER_ENABLED:
259 case ATA_DITER_ALL:
260 dev = link->device;
261 goto check;
262 case ATA_DITER_ENABLED_REVERSE:
263 case ATA_DITER_ALL_REVERSE:
264 dev = link->device + ata_link_max_devices(link) - 1;
265 goto check;
266 }
267
268 next:
269 /* move to the next one */
270 switch (mode) {
271 case ATA_DITER_ENABLED:
272 case ATA_DITER_ALL:
273 if (++dev < link->device + ata_link_max_devices(link))
274 goto check;
275 return NULL;
276 case ATA_DITER_ENABLED_REVERSE:
277 case ATA_DITER_ALL_REVERSE:
278 if (--dev >= link->device)
279 goto check;
280 return NULL;
281 }
282
283 check:
284 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
285 !ata_dev_enabled(dev))
286 goto next;
287 return dev;
288}
289
290/**
Tejun Heob1c72912008-07-31 17:02:43 +0900291 * ata_dev_phys_link - find physical link for a device
292 * @dev: ATA device to look up physical link for
293 *
294 * Look up physical link which @dev is attached to. Note that
295 * this is different from @dev->link only when @dev is on slave
296 * link. For all other cases, it's the same as @dev->link.
297 *
298 * LOCKING:
299 * Don't care.
300 *
301 * RETURNS:
302 * Pointer to the found physical link.
303 */
304struct ata_link *ata_dev_phys_link(struct ata_device *dev)
305{
306 struct ata_port *ap = dev->link->ap;
307
308 if (!ap->slave_link)
309 return dev->link;
310 if (!dev->devno)
311 return &ap->link;
312 return ap->slave_link;
313}
314
315/**
Tejun Heo33267322008-02-13 09:15:09 +0900316 * ata_force_cbl - force cable type according to libata.force
Randy Dunlap4cdfa1b2008-02-22 12:21:37 -0800317 * @ap: ATA port of interest
Tejun Heo33267322008-02-13 09:15:09 +0900318 *
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
323 * same effect.
324 *
325 * LOCKING:
326 * EH context.
327 */
328void ata_force_cbl(struct ata_port *ap)
329{
330 int i;
331
332 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
333 const struct ata_force_ent *fe = &ata_force_tbl[i];
334
335 if (fe->port != -1 && fe->port != ap->print_id)
336 continue;
337
338 if (fe->param.cbl == ATA_CBL_NONE)
339 continue;
340
341 ap->cbl = fe->param.cbl;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900343 return;
344 }
345}
346
347/**
Tejun Heo05944bd2008-08-13 20:19:09 +0900348 * ata_force_link_limits - force link limits according to libata.force
Tejun Heo33267322008-02-13 09:15:09 +0900349 * @link: ATA link of interest
350 *
Tejun Heo05944bd2008-08-13 20:19:09 +0900351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
Tejun Heob1c72912008-07-31 17:02:43 +0900357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
Tejun Heo33267322008-02-13 09:15:09 +0900359 *
360 * LOCKING:
361 * EH context.
362 */
Tejun Heo05944bd2008-08-13 20:19:09 +0900363static void ata_force_link_limits(struct ata_link *link)
Tejun Heo33267322008-02-13 09:15:09 +0900364{
Tejun Heo05944bd2008-08-13 20:19:09 +0900365 bool did_spd = false;
Tejun Heob1c72912008-07-31 17:02:43 +0900366 int linkno = link->pmp;
367 int i;
Tejun Heo33267322008-02-13 09:15:09 +0900368
369 if (ata_is_host_link(link))
Tejun Heob1c72912008-07-31 17:02:43 +0900370 linkno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900371
372 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
373 const struct ata_force_ent *fe = &ata_force_tbl[i];
374
375 if (fe->port != -1 && fe->port != link->ap->print_id)
376 continue;
377
378 if (fe->device != -1 && fe->device != linkno)
379 continue;
380
Tejun Heo05944bd2008-08-13 20:19:09 +0900381 /* only honor the first spd limit */
382 if (!did_spd && fe->param.spd_limit) {
383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
Tejun Heo05944bd2008-08-13 20:19:09 +0900385 fe->param.name);
386 did_spd = true;
387 }
Tejun Heo33267322008-02-13 09:15:09 +0900388
Tejun Heo05944bd2008-08-13 20:19:09 +0900389 /* let lflags stack */
390 if (fe->param.lflags) {
391 link->flags |= fe->param.lflags;
Joe Perchesa9a79df2011-04-15 15:51:59 -0700392 ata_link_notice(link,
Tejun Heo05944bd2008-08-13 20:19:09 +0900393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe->param.lflags, link->flags);
395 }
Tejun Heo33267322008-02-13 09:15:09 +0900396 }
397}
398
399/**
400 * ata_force_xfermask - force xfermask according to libata.force
401 * @dev: ATA device of interest
402 *
403 * Force xfer_mask according to libata.force and whine about it.
404 * For consistency with link selection, device number 15 selects
405 * the first device connected to the host link.
406 *
407 * LOCKING:
408 * EH context.
409 */
410static void ata_force_xfermask(struct ata_device *dev)
411{
412 int devno = dev->link->pmp + dev->devno;
413 int alt_devno = devno;
414 int i;
415
Tejun Heob1c72912008-07-31 17:02:43 +0900416 /* allow n.15/16 for devices attached to host port */
417 if (ata_is_host_link(dev->link))
418 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900419
420 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
421 const struct ata_force_ent *fe = &ata_force_tbl[i];
422 unsigned long pio_mask, mwdma_mask, udma_mask;
423
424 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
425 continue;
426
427 if (fe->device != -1 && fe->device != devno &&
428 fe->device != alt_devno)
429 continue;
430
431 if (!fe->param.xfer_mask)
432 continue;
433
434 ata_unpack_xfermask(fe->param.xfer_mask,
435 &pio_mask, &mwdma_mask, &udma_mask);
436 if (udma_mask)
437 dev->udma_mask = udma_mask;
438 else if (mwdma_mask) {
439 dev->udma_mask = 0;
440 dev->mwdma_mask = mwdma_mask;
441 } else {
442 dev->udma_mask = 0;
443 dev->mwdma_mask = 0;
444 dev->pio_mask = pio_mask;
445 }
446
Joe Perchesa9a79df2011-04-15 15:51:59 -0700447 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
448 fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900449 return;
450 }
451}
452
453/**
454 * ata_force_horkage - force horkage according to libata.force
455 * @dev: ATA device of interest
456 *
457 * Force horkage according to libata.force and whine about it.
458 * For consistency with link selection, device number 15 selects
459 * the first device connected to the host link.
460 *
461 * LOCKING:
462 * EH context.
463 */
464static void ata_force_horkage(struct ata_device *dev)
465{
466 int devno = dev->link->pmp + dev->devno;
467 int alt_devno = devno;
468 int i;
469
Tejun Heob1c72912008-07-31 17:02:43 +0900470 /* allow n.15/16 for devices attached to host port */
471 if (ata_is_host_link(dev->link))
472 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900473
474 for (i = 0; i < ata_force_tbl_size; i++) {
475 const struct ata_force_ent *fe = &ata_force_tbl[i];
476
477 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
478 continue;
479
480 if (fe->device != -1 && fe->device != devno &&
481 fe->device != alt_devno)
482 continue;
483
484 if (!(~dev->horkage & fe->param.horkage_on) &&
485 !(dev->horkage & fe->param.horkage_off))
486 continue;
487
488 dev->horkage |= fe->param.horkage_on;
489 dev->horkage &= ~fe->param.horkage_off;
490
Joe Perchesa9a79df2011-04-15 15:51:59 -0700491 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
492 fe->param.name);
Tejun Heo33267322008-02-13 09:15:09 +0900493 }
494}
495
496/**
Tejun Heo436d34b2008-04-02 17:28:46 +0900497 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
498 * @opcode: SCSI opcode
499 *
500 * Determine ATAPI command type from @opcode.
501 *
502 * LOCKING:
503 * None.
504 *
505 * RETURNS:
506 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
507 */
508int atapi_cmd_type(u8 opcode)
509{
510 switch (opcode) {
511 case GPCMD_READ_10:
512 case GPCMD_READ_12:
513 return ATAPI_READ;
514
515 case GPCMD_WRITE_10:
516 case GPCMD_WRITE_12:
517 case GPCMD_WRITE_AND_VERIFY_10:
518 return ATAPI_WRITE;
519
520 case GPCMD_READ_CD:
521 case GPCMD_READ_CD_MSF:
522 return ATAPI_READ_CD;
523
Tejun Heoe52dcc42008-04-02 17:35:19 +0900524 case ATA_16:
525 case ATA_12:
526 if (atapi_passthru16)
527 return ATAPI_PASS_THRU;
528 /* fall thru */
Tejun Heo436d34b2008-04-02 17:28:46 +0900529 default:
530 return ATAPI_MISC;
531 }
532}
533
534/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
536 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900538 * @is_cmd: This FIS is for command
539 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 *
541 * Converts a standard ATA taskfile to a Serial ATA
542 * FIS structure (Register - Host to Device).
543 *
544 * LOCKING:
545 * Inherited from caller.
546 */
Tejun Heo99771262007-07-16 14:29:38 +0900547void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{
Tejun Heo99771262007-07-16 14:29:38 +0900549 fis[0] = 0x27; /* Register - Host to Device FIS */
550 fis[1] = pmp & 0xf; /* Port multiplier number*/
551 if (is_cmd)
552 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 fis[2] = tf->command;
555 fis[3] = tf->feature;
556
557 fis[4] = tf->lbal;
558 fis[5] = tf->lbam;
559 fis[6] = tf->lbah;
560 fis[7] = tf->device;
561
562 fis[8] = tf->hob_lbal;
563 fis[9] = tf->hob_lbam;
564 fis[10] = tf->hob_lbah;
565 fis[11] = tf->hob_feature;
566
567 fis[12] = tf->nsect;
568 fis[13] = tf->hob_nsect;
569 fis[14] = 0;
570 fis[15] = tf->ctl;
571
572 fis[16] = 0;
573 fis[17] = 0;
574 fis[18] = 0;
575 fis[19] = 0;
576}
577
578/**
579 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
580 * @fis: Buffer from which data will be input
581 * @tf: Taskfile to output
582 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500583 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 *
585 * LOCKING:
586 * Inherited from caller.
587 */
588
Jeff Garzik057ace52005-10-22 14:27:05 -0400589void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
591 tf->command = fis[2]; /* status */
592 tf->feature = fis[3]; /* error */
593
594 tf->lbal = fis[4];
595 tf->lbam = fis[5];
596 tf->lbah = fis[6];
597 tf->device = fis[7];
598
599 tf->hob_lbal = fis[8];
600 tf->hob_lbam = fis[9];
601 tf->hob_lbah = fis[10];
602
603 tf->nsect = fis[12];
604 tf->hob_nsect = fis[13];
605}
606
Albert Lee8cbd6df2005-10-12 15:06:27 +0800607static const u8 ata_rw_cmds[] = {
608 /* pio multi */
609 ATA_CMD_READ_MULTI,
610 ATA_CMD_WRITE_MULTI,
611 ATA_CMD_READ_MULTI_EXT,
612 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100613 0,
614 0,
615 0,
616 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800617 /* pio */
618 ATA_CMD_PIO_READ,
619 ATA_CMD_PIO_WRITE,
620 ATA_CMD_PIO_READ_EXT,
621 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100622 0,
623 0,
624 0,
625 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800626 /* dma */
627 ATA_CMD_READ,
628 ATA_CMD_WRITE,
629 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100630 ATA_CMD_WRITE_EXT,
631 0,
632 0,
633 0,
634 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800635};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
637/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800638 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900639 * @tf: command to examine and configure
640 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500642 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800643 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 *
645 * LOCKING:
646 * caller.
647 */
Tejun Heobd056d72006-11-14 22:47:10 +0900648static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100650 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100652 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500653
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100654 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800655 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
656 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
Albert Lee8cbd6df2005-10-12 15:06:27 +0800658 if (dev->flags & ATA_DFLAG_PIO) {
659 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100660 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900661 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000662 /* Unable to use DMA due to host limitation */
663 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800664 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800665 } else {
666 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100667 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800668 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100670 cmd = ata_rw_cmds[index + fua + lba48 + write];
671 if (cmd) {
672 tf->command = cmd;
673 return 0;
674 }
675 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676}
677
Tejun Heocb95d562006-03-06 04:31:56 +0900678/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900679 * ata_tf_read_block - Read block address from ATA taskfile
680 * @tf: ATA taskfile of interest
681 * @dev: ATA device @tf belongs to
682 *
683 * LOCKING:
684 * None.
685 *
686 * Read block address from @tf. This function can handle all
687 * three address formats - LBA, LBA48 and CHS. tf->protocol and
688 * flags select the address format to use.
689 *
690 * RETURNS:
691 * Block address read from @tf.
692 */
693u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
694{
695 u64 block = 0;
696
697 if (tf->flags & ATA_TFLAG_LBA) {
698 if (tf->flags & ATA_TFLAG_LBA48) {
699 block |= (u64)tf->hob_lbah << 40;
700 block |= (u64)tf->hob_lbam << 32;
Roland Dreier44901a92008-11-04 10:34:48 -0800701 block |= (u64)tf->hob_lbal << 24;
Tejun Heo35b649f2006-11-14 22:37:35 +0900702 } else
703 block |= (tf->device & 0xf) << 24;
704
705 block |= tf->lbah << 16;
706 block |= tf->lbam << 8;
707 block |= tf->lbal;
708 } else {
709 u32 cyl, head, sect;
710
711 cyl = tf->lbam | (tf->lbah << 8);
712 head = tf->device & 0xf;
713 sect = tf->lbal;
714
Tejun Heoac8672e2009-08-16 21:21:21 +0900715 if (!sect) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700716 ata_dev_warn(dev,
717 "device reported invalid CHS sector 0\n");
Tejun Heoac8672e2009-08-16 21:21:21 +0900718 sect = 1; /* oh well */
719 }
720
721 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
Tejun Heo35b649f2006-11-14 22:37:35 +0900722 }
723
724 return block;
725}
726
727/**
Tejun Heobd056d72006-11-14 22:47:10 +0900728 * ata_build_rw_tf - Build ATA taskfile for given read/write request
729 * @tf: Target ATA taskfile
730 * @dev: ATA device @tf belongs to
731 * @block: Block address
732 * @n_block: Number of blocks
733 * @tf_flags: RW/FUA etc...
734 * @tag: tag
735 *
736 * LOCKING:
737 * None.
738 *
739 * Build ATA taskfile @tf for read/write request described by
740 * @block, @n_block, @tf_flags and @tag on @dev.
741 *
742 * RETURNS:
743 *
744 * 0 on success, -ERANGE if the request is too large for @dev,
745 * -EINVAL if the request is invalid.
746 */
747int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
748 u64 block, u32 n_block, unsigned int tf_flags,
749 unsigned int tag)
750{
751 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
752 tf->flags |= tf_flags;
753
Tejun Heo6d1245b2007-02-20 23:20:27 +0900754 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900755 /* yay, NCQ */
756 if (!lba_48_ok(block, n_block))
757 return -ERANGE;
758
759 tf->protocol = ATA_PROT_NCQ;
760 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
761
762 if (tf->flags & ATA_TFLAG_WRITE)
763 tf->command = ATA_CMD_FPDMA_WRITE;
764 else
765 tf->command = ATA_CMD_FPDMA_READ;
766
767 tf->nsect = tag << 3;
768 tf->hob_feature = (n_block >> 8) & 0xff;
769 tf->feature = n_block & 0xff;
770
771 tf->hob_lbah = (block >> 40) & 0xff;
772 tf->hob_lbam = (block >> 32) & 0xff;
773 tf->hob_lbal = (block >> 24) & 0xff;
774 tf->lbah = (block >> 16) & 0xff;
775 tf->lbam = (block >> 8) & 0xff;
776 tf->lbal = block & 0xff;
777
Sergei Shtylyov9ca7cfa2012-08-21 22:18:50 +0400778 tf->device = ATA_LBA;
Tejun Heobd056d72006-11-14 22:47:10 +0900779 if (tf->flags & ATA_TFLAG_FUA)
780 tf->device |= 1 << 7;
781 } else if (dev->flags & ATA_DFLAG_LBA) {
782 tf->flags |= ATA_TFLAG_LBA;
783
784 if (lba_28_ok(block, n_block)) {
785 /* use LBA28 */
786 tf->device |= (block >> 24) & 0xf;
787 } else if (lba_48_ok(block, n_block)) {
788 if (!(dev->flags & ATA_DFLAG_LBA48))
789 return -ERANGE;
790
791 /* use LBA48 */
792 tf->flags |= ATA_TFLAG_LBA48;
793
794 tf->hob_nsect = (n_block >> 8) & 0xff;
795
796 tf->hob_lbah = (block >> 40) & 0xff;
797 tf->hob_lbam = (block >> 32) & 0xff;
798 tf->hob_lbal = (block >> 24) & 0xff;
799 } else
800 /* request too large even for LBA48 */
801 return -ERANGE;
802
803 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
804 return -EINVAL;
805
806 tf->nsect = n_block & 0xff;
807
808 tf->lbah = (block >> 16) & 0xff;
809 tf->lbam = (block >> 8) & 0xff;
810 tf->lbal = block & 0xff;
811
812 tf->device |= ATA_LBA;
813 } else {
814 /* CHS */
815 u32 sect, head, cyl, track;
816
817 /* The request -may- be too large for CHS addressing. */
818 if (!lba_28_ok(block, n_block))
819 return -ERANGE;
820
821 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
822 return -EINVAL;
823
824 /* Convert LBA to CHS */
825 track = (u32)block / dev->sectors;
826 cyl = track / dev->heads;
827 head = track % dev->heads;
828 sect = (u32)block % dev->sectors + 1;
829
830 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
831 (u32)block, track, cyl, head, sect);
832
833 /* Check whether the converted CHS can fit.
834 Cylinder: 0-65535
835 Head: 0-15
836 Sector: 1-255*/
837 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
838 return -ERANGE;
839
840 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
841 tf->lbal = sect;
842 tf->lbam = cyl;
843 tf->lbah = cyl >> 8;
844 tf->device |= head;
845 }
846
847 return 0;
848}
849
850/**
Tejun Heocb95d562006-03-06 04:31:56 +0900851 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
852 * @pio_mask: pio_mask
853 * @mwdma_mask: mwdma_mask
854 * @udma_mask: udma_mask
855 *
856 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
857 * unsigned int xfer_mask.
858 *
859 * LOCKING:
860 * None.
861 *
862 * RETURNS:
863 * Packed xfer_mask.
864 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900865unsigned long ata_pack_xfermask(unsigned long pio_mask,
866 unsigned long mwdma_mask,
867 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900868{
869 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
870 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
871 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
872}
873
Tejun Heoc0489e42006-03-24 14:07:49 +0900874/**
875 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
876 * @xfer_mask: xfer_mask to unpack
877 * @pio_mask: resulting pio_mask
878 * @mwdma_mask: resulting mwdma_mask
879 * @udma_mask: resulting udma_mask
880 *
881 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
882 * Any NULL distination masks will be ignored.
883 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900884void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
885 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900886{
887 if (pio_mask)
888 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
889 if (mwdma_mask)
890 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
891 if (udma_mask)
892 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
893}
894
Tejun Heocb95d562006-03-06 04:31:56 +0900895static const struct ata_xfer_ent {
Tejun Heobe9a50c2006-03-31 22:48:52 +0900896 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900897 u8 base;
898} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900899 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
900 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
901 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900902 { -1, },
903};
904
905/**
906 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
907 * @xfer_mask: xfer_mask of interest
908 *
909 * Return matching XFER_* value for @xfer_mask. Only the highest
910 * bit of @xfer_mask is considered.
911 *
912 * LOCKING:
913 * None.
914 *
915 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900916 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900917 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900918u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900919{
920 int highbit = fls(xfer_mask) - 1;
921 const struct ata_xfer_ent *ent;
922
923 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
924 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
925 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900926 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900927}
928
929/**
930 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
931 * @xfer_mode: XFER_* of interest
932 *
933 * Return matching xfer_mask for @xfer_mode.
934 *
935 * LOCKING:
936 * None.
937 *
938 * RETURNS:
939 * Matching xfer_mask, 0 if no match found.
940 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900941unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900942{
943 const struct ata_xfer_ent *ent;
944
945 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
946 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900947 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
948 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900949 return 0;
950}
951
952/**
953 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
954 * @xfer_mode: XFER_* of interest
955 *
956 * Return matching xfer_shift for @xfer_mode.
957 *
958 * LOCKING:
959 * None.
960 *
961 * RETURNS:
962 * Matching xfer_shift, -1 if no match found.
963 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900964int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900965{
966 const struct ata_xfer_ent *ent;
967
968 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
969 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
970 return ent->shift;
971 return -1;
972}
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900975 * ata_mode_string - convert xfer_mask to string
976 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 *
978 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900979 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 *
981 * LOCKING:
982 * None.
983 *
984 * RETURNS:
985 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900986 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900988const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989{
Tejun Heo75f554b2006-03-06 04:31:57 +0900990 static const char * const xfer_mode_str[] = {
991 "PIO0",
992 "PIO1",
993 "PIO2",
994 "PIO3",
995 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100996 "PIO5",
997 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900998 "MWDMA0",
999 "MWDMA1",
1000 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +01001001 "MWDMA3",
1002 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +09001003 "UDMA/16",
1004 "UDMA/25",
1005 "UDMA/33",
1006 "UDMA/44",
1007 "UDMA/66",
1008 "UDMA/100",
1009 "UDMA/133",
1010 "UDMA7",
1011 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001012 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
Tejun Heo1da7b0d2006-03-06 04:31:56 +09001014 highbit = fls(xfer_mask) - 1;
1015 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1016 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018}
1019
Gwendal Grignoud9027472010-05-25 12:31:38 -07001020const char *sata_spd_string(unsigned int spd)
Tejun Heo4c360c82006-04-01 01:38:17 +09001021{
1022 static const char * const spd_str[] = {
1023 "1.5 Gbps",
1024 "3.0 Gbps",
Shane Huang8522ee22008-12-30 11:00:37 +08001025 "6.0 Gbps",
Tejun Heo4c360c82006-04-01 01:38:17 +09001026 };
1027
1028 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1029 return "<unknown>";
1030 return spd_str[spd - 1];
1031}
1032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033/**
1034 * ata_dev_classify - determine device type based on ATA-spec signature
1035 * @tf: ATA taskfile register set for device to be identified
1036 *
1037 * Determine from taskfile register contents whether a device is
1038 * ATA or ATAPI, as per "Signature and persistence" section
1039 * of ATA/PI spec (volume 1, sect 5.14).
1040 *
1041 * LOCKING:
1042 * None.
1043 *
1044 * RETURNS:
Tejun Heo633273a2007-09-23 13:19:54 +09001045 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1046 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 */
Jeff Garzik057ace52005-10-22 14:27:05 -04001048unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049{
1050 /* Apple's open source Darwin code hints that some devices only
1051 * put a proper signature into the LBA mid/high registers,
1052 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a2007-09-23 13:19:54 +09001053 *
1054 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1055 * signatures for ATA and ATAPI devices attached on SerialATA,
1056 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1057 * spec has never mentioned about using different signatures
1058 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1059 * Multiplier specification began to use 0x69/0x96 to identify
1060 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1061 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1062 * 0x69/0x96 shortly and described them as reserved for
1063 * SerialATA.
1064 *
1065 * We follow the current spec and consider that 0x69/0x96
1066 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Tejun Heo79b42ba2009-04-15 06:21:10 +09001067 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1068 * SEMB signature. This is worked around in
1069 * ata_dev_read_id().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 */
Tejun Heo633273a2007-09-23 13:19:54 +09001071 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 DPRINTK("found ATA device by sig\n");
1073 return ATA_DEV_ATA;
1074 }
1075
Tejun Heo633273a2007-09-23 13:19:54 +09001076 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 DPRINTK("found ATAPI device by sig\n");
1078 return ATA_DEV_ATAPI;
1079 }
1080
Tejun Heo633273a2007-09-23 13:19:54 +09001081 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1082 DPRINTK("found PMP device by sig\n");
1083 return ATA_DEV_PMP;
1084 }
1085
1086 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001087 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1088 return ATA_DEV_SEMB;
Tejun Heo633273a2007-09-23 13:19:54 +09001089 }
1090
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 DPRINTK("unknown device\n");
1092 return ATA_DEV_UNKNOWN;
1093}
1094
1095/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001096 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 * @id: IDENTIFY DEVICE results we will examine
1098 * @s: string into which data is output
1099 * @ofs: offset into identify device page
1100 * @len: length of string to return. must be an even number.
1101 *
1102 * The strings in the IDENTIFY DEVICE page are broken up into
1103 * 16-bit chunks. Run through the string, and output each
1104 * 8-bit chunk linearly, regardless of platform.
1105 *
1106 * LOCKING:
1107 * caller.
1108 */
1109
Tejun Heo6a62a042006-02-13 10:02:46 +09001110void ata_id_string(const u16 *id, unsigned char *s,
1111 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112{
1113 unsigned int c;
1114
Alan Cox963e4972008-07-24 17:16:06 +01001115 BUG_ON(len & 1);
1116
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 while (len > 0) {
1118 c = id[ofs] >> 8;
1119 *s = c;
1120 s++;
1121
1122 c = id[ofs] & 0xff;
1123 *s = c;
1124 s++;
1125
1126 ofs++;
1127 len -= 2;
1128 }
1129}
1130
Tejun Heo0e949ff2006-02-12 22:47:04 +09001131/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001132 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001133 * @id: IDENTIFY DEVICE results we will examine
1134 * @s: string into which data is output
1135 * @ofs: offset into identify device page
1136 * @len: length of string to return. must be an odd number.
1137 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001138 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001139 * trims trailing spaces and terminates the resulting string with
1140 * null. @len must be actual maximum length (even number) + 1.
1141 *
1142 * LOCKING:
1143 * caller.
1144 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001145void ata_id_c_string(const u16 *id, unsigned char *s,
1146 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001147{
1148 unsigned char *p;
1149
Tejun Heo6a62a042006-02-13 10:02:46 +09001150 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001151
1152 p = s + strnlen(s, len - 1);
1153 while (p > s && p[-1] == ' ')
1154 p--;
1155 *p = '\0';
1156}
Edward Falk0baab862005-06-02 18:17:13 -04001157
Tejun Heodb6f8752007-09-03 12:31:58 +09001158static u64 ata_id_n_sectors(const u16 *id)
1159{
1160 if (ata_id_has_lba(id)) {
1161 if (ata_id_has_lba48(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001162 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
Tejun Heodb6f8752007-09-03 12:31:58 +09001163 else
Robert Hancock968e5942009-02-16 20:15:08 -06001164 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
Tejun Heodb6f8752007-09-03 12:31:58 +09001165 } else {
1166 if (ata_id_current_chs_valid(id))
Robert Hancock968e5942009-02-16 20:15:08 -06001167 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1168 id[ATA_ID_CUR_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001169 else
Robert Hancock968e5942009-02-16 20:15:08 -06001170 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1171 id[ATA_ID_SECTORS];
Tejun Heodb6f8752007-09-03 12:31:58 +09001172 }
1173}
1174
Tejun Heoa5987e02008-03-27 19:14:23 +09001175u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001176{
1177 u64 sectors = 0;
1178
1179 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1180 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
Roland Dreierba14a9c2008-10-28 16:52:20 -07001181 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
Alan Cox1e999732007-04-11 00:23:13 +01001182 sectors |= (tf->lbah & 0xff) << 16;
1183 sectors |= (tf->lbam & 0xff) << 8;
1184 sectors |= (tf->lbal & 0xff);
1185
Tejun Heoa5987e02008-03-27 19:14:23 +09001186 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001187}
1188
Tejun Heoa5987e02008-03-27 19:14:23 +09001189u64 ata_tf_to_lba(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001190{
1191 u64 sectors = 0;
1192
1193 sectors |= (tf->device & 0x0f) << 24;
1194 sectors |= (tf->lbah & 0xff) << 16;
1195 sectors |= (tf->lbam & 0xff) << 8;
1196 sectors |= (tf->lbal & 0xff);
1197
Tejun Heoa5987e02008-03-27 19:14:23 +09001198 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001199}
1200
1201/**
Tejun Heoc728a912007-09-03 12:32:30 +09001202 * ata_read_native_max_address - Read native max address
1203 * @dev: target device
1204 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001205 *
Tejun Heoc728a912007-09-03 12:32:30 +09001206 * Perform an LBA48 or LBA28 native size query upon the device in
1207 * question.
1208 *
1209 * RETURNS:
1210 * 0 on success, -EACCES if command is aborted by the drive.
1211 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001212 */
Tejun Heoc728a912007-09-03 12:32:30 +09001213static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001214{
Tejun Heoc728a912007-09-03 12:32:30 +09001215 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001216 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001217 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001218
1219 ata_tf_init(dev, &tf);
1220
Tejun Heoc728a912007-09-03 12:32:30 +09001221 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001222 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001223
1224 if (lba48) {
1225 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1226 tf.flags |= ATA_TFLAG_LBA48;
1227 } else
1228 tf.command = ATA_CMD_READ_NATIVE_MAX;
1229
Alan Cox1e999732007-04-11 00:23:13 +01001230 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001231 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001232
Tejun Heo2b789102007-10-09 15:05:44 +09001233 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001234 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001235 ata_dev_warn(dev,
1236 "failed to read native max address (err_mask=0x%x)\n",
1237 err_mask);
Tejun Heoc728a912007-09-03 12:32:30 +09001238 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1239 return -EACCES;
1240 return -EIO;
1241 }
Alan Cox1e999732007-04-11 00:23:13 +01001242
Tejun Heoc728a912007-09-03 12:32:30 +09001243 if (lba48)
Tejun Heoa5987e02008-03-27 19:14:23 +09001244 *max_sectors = ata_tf_to_lba48(&tf) + 1;
Tejun Heoc728a912007-09-03 12:32:30 +09001245 else
Tejun Heoa5987e02008-03-27 19:14:23 +09001246 *max_sectors = ata_tf_to_lba(&tf) + 1;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001247 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001248 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001249 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001250}
1251
1252/**
Tejun Heoc728a912007-09-03 12:32:30 +09001253 * ata_set_max_sectors - Set max sectors
1254 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001255 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001256 *
Tejun Heoc728a912007-09-03 12:32:30 +09001257 * Set max sectors of @dev to @new_sectors.
1258 *
1259 * RETURNS:
1260 * 0 on success, -EACCES if command is aborted or denied (due to
1261 * previous non-volatile SET_MAX) by the drive. -EIO on other
1262 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001263 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001264static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001265{
Tejun Heoc728a912007-09-03 12:32:30 +09001266 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001267 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001268 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001269
1270 new_sectors--;
1271
1272 ata_tf_init(dev, &tf);
1273
Alan Cox1e999732007-04-11 00:23:13 +01001274 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001275
1276 if (lba48) {
1277 tf.command = ATA_CMD_SET_MAX_EXT;
1278 tf.flags |= ATA_TFLAG_LBA48;
1279
1280 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1281 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1282 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001283 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001284 tf.command = ATA_CMD_SET_MAX;
1285
Tejun Heo1e582ba2007-09-21 20:07:14 +09001286 tf.device |= (new_sectors >> 24) & 0xf;
1287 }
1288
Alan Cox1e999732007-04-11 00:23:13 +01001289 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001290 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001291
1292 tf.lbal = (new_sectors >> 0) & 0xff;
1293 tf.lbam = (new_sectors >> 8) & 0xff;
1294 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001295
Tejun Heo2b789102007-10-09 15:05:44 +09001296 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001297 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001298 ata_dev_warn(dev,
1299 "failed to set max address (err_mask=0x%x)\n",
1300 err_mask);
Tejun Heoc728a912007-09-03 12:32:30 +09001301 if (err_mask == AC_ERR_DEV &&
1302 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1303 return -EACCES;
1304 return -EIO;
1305 }
Alan Cox1e999732007-04-11 00:23:13 +01001306
Tejun Heoc728a912007-09-03 12:32:30 +09001307 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001308}
1309
1310/**
1311 * ata_hpa_resize - Resize a device with an HPA set
1312 * @dev: Device to resize
1313 *
1314 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1315 * it if required to the full size of the media. The caller must check
1316 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001317 *
1318 * RETURNS:
1319 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001320 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001321static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001322{
Tejun Heo05027ad2007-09-03 12:32:57 +09001323 struct ata_eh_context *ehc = &dev->link->eh_context;
1324 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo445d2112010-04-05 10:33:13 +09001325 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
Tejun Heo05027ad2007-09-03 12:32:57 +09001326 u64 sectors = ata_id_n_sectors(dev->id);
1327 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001328 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001329
Tejun Heo05027ad2007-09-03 12:32:57 +09001330 /* do we need to do it? */
1331 if (dev->class != ATA_DEV_ATA ||
1332 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1333 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001334 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001335
Tejun Heo05027ad2007-09-03 12:32:57 +09001336 /* read native max address */
1337 rc = ata_read_native_max_address(dev, &native_sectors);
1338 if (rc) {
Tejun Heodda7aba2008-03-23 21:05:15 +09001339 /* If device aborted the command or HPA isn't going to
1340 * be unlocked, skip HPA resizing.
Tejun Heo05027ad2007-09-03 12:32:57 +09001341 */
Tejun Heo445d2112010-04-05 10:33:13 +09001342 if (rc == -EACCES || !unlock_hpa) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001343 ata_dev_warn(dev,
1344 "HPA support seems broken, skipping HPA handling\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001345 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001346
Tejun Heo05027ad2007-09-03 12:32:57 +09001347 /* we can continue if device aborted the command */
1348 if (rc == -EACCES)
1349 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001350 }
Tejun Heo37301a52007-06-25 20:45:54 +09001351
Tejun Heo05027ad2007-09-03 12:32:57 +09001352 return rc;
1353 }
Tejun Heo5920dad2009-07-15 17:11:41 +09001354 dev->n_native_sectors = native_sectors;
Tejun Heo05027ad2007-09-03 12:32:57 +09001355
1356 /* nothing to do? */
Tejun Heo445d2112010-04-05 10:33:13 +09001357 if (native_sectors <= sectors || !unlock_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001358 if (!print_info || native_sectors == sectors)
1359 return 0;
1360
1361 if (native_sectors > sectors)
Joe Perchesa9a79df2011-04-15 15:51:59 -07001362 ata_dev_info(dev,
Tejun Heo05027ad2007-09-03 12:32:57 +09001363 "HPA detected: current %llu, native %llu\n",
1364 (unsigned long long)sectors,
1365 (unsigned long long)native_sectors);
1366 else if (native_sectors < sectors)
Joe Perchesa9a79df2011-04-15 15:51:59 -07001367 ata_dev_warn(dev,
1368 "native sectors (%llu) is smaller than sectors (%llu)\n",
Tejun Heo05027ad2007-09-03 12:32:57 +09001369 (unsigned long long)native_sectors,
1370 (unsigned long long)sectors);
1371 return 0;
1372 }
1373
1374 /* let's unlock HPA */
1375 rc = ata_set_max_sectors(dev, native_sectors);
1376 if (rc == -EACCES) {
1377 /* if device aborted the command, skip HPA resizing */
Joe Perchesa9a79df2011-04-15 15:51:59 -07001378 ata_dev_warn(dev,
1379 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1380 (unsigned long long)sectors,
1381 (unsigned long long)native_sectors);
Tejun Heo05027ad2007-09-03 12:32:57 +09001382 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1383 return 0;
1384 } else if (rc)
1385 return rc;
1386
1387 /* re-read IDENTIFY data */
1388 rc = ata_dev_reread_id(dev, 0);
1389 if (rc) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001390 ata_dev_err(dev,
1391 "failed to re-read IDENTIFY data after HPA resizing\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001392 return rc;
1393 }
1394
1395 if (print_info) {
1396 u64 new_sectors = ata_id_n_sectors(dev->id);
Joe Perchesa9a79df2011-04-15 15:51:59 -07001397 ata_dev_info(dev,
Tejun Heo05027ad2007-09-03 12:32:57 +09001398 "HPA unlocked: %llu -> %llu, native %llu\n",
1399 (unsigned long long)sectors,
1400 (unsigned long long)new_sectors,
1401 (unsigned long long)native_sectors);
1402 }
1403
1404 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001405}
1406
Edward Falk0baab862005-06-02 18:17:13 -04001407/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001409 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001411 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1412 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 *
1414 * LOCKING:
1415 * caller.
1416 */
1417
Tejun Heo0bd33002006-02-12 22:47:05 +09001418static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419{
1420 DPRINTK("49==0x%04x "
1421 "53==0x%04x "
1422 "63==0x%04x "
1423 "64==0x%04x "
1424 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001425 id[49],
1426 id[53],
1427 id[63],
1428 id[64],
1429 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 DPRINTK("80==0x%04x "
1431 "81==0x%04x "
1432 "82==0x%04x "
1433 "83==0x%04x "
1434 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001435 id[80],
1436 id[81],
1437 id[82],
1438 id[83],
1439 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 DPRINTK("88==0x%04x "
1441 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001442 id[88],
1443 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444}
1445
Tejun Heocb95d562006-03-06 04:31:56 +09001446/**
1447 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1448 * @id: IDENTIFY data to compute xfer mask from
1449 *
1450 * Compute the xfermask for this device. This is not as trivial
1451 * as it seems if we must consider early devices correctly.
1452 *
1453 * FIXME: pre IDE drive timing (do we care ?).
1454 *
1455 * LOCKING:
1456 * None.
1457 *
1458 * RETURNS:
1459 * Computed xfermask
1460 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001461unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001462{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001463 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001464
1465 /* Usual case. Word 53 indicates word 64 is valid */
1466 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1467 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1468 pio_mask <<= 3;
1469 pio_mask |= 0x7;
1470 } else {
1471 /* If word 64 isn't valid then Word 51 high byte holds
1472 * the PIO timing number for the maximum. Turn it into
1473 * a mask.
1474 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001475 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001476 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001477 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001478 else
1479 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001480
1481 /* But wait.. there's more. Design your standards by
1482 * committee and you too can get a free iordy field to
1483 * process. However its the speeds not the modes that
1484 * are supported... Note drivers using the timing API
1485 * will get this right anyway
1486 */
1487 }
1488
1489 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001490
Alan Coxb352e572006-08-10 18:52:12 +01001491 if (ata_id_is_cfa(id)) {
1492 /*
1493 * Process compact flash extended modes
1494 */
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04001495 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1496 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
Alan Coxb352e572006-08-10 18:52:12 +01001497
1498 if (pio)
1499 pio_mask |= (1 << 5);
1500 if (pio > 1)
1501 pio_mask |= (1 << 6);
1502 if (dma)
1503 mwdma_mask |= (1 << 3);
1504 if (dma > 1)
1505 mwdma_mask |= (1 << 4);
1506 }
1507
Tejun Heofb21f0d2006-03-12 12:34:35 +09001508 udma_mask = 0;
1509 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1510 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001511
1512 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1513}
1514
Adrian Bunk7102d232007-01-04 00:09:36 +01001515static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001516{
Tejun Heo77853bf2006-01-23 13:09:36 +09001517 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001518
Tejun Heoa2a7a662005-12-13 14:48:31 +09001519 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001520}
1521
1522/**
Tejun Heo24326972006-11-14 22:47:09 +09001523 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001524 * @dev: Device to which the command is sent
1525 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001526 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001527 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001528 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001529 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001530 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001531 *
1532 * Executes libata internal command with timeout. @tf contains
1533 * command on entry and result on return. Timeout and error
1534 * conditions are reported via return value. No recovery action
1535 * is taken after a command times out. It's caller's duty to
1536 * clean up after timeout.
1537 *
1538 * LOCKING:
1539 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001540 *
1541 * RETURNS:
1542 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001543 */
Tejun Heo24326972006-11-14 22:47:09 +09001544unsigned ata_exec_internal_sg(struct ata_device *dev,
1545 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001546 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001547 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001548{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001549 struct ata_link *link = dev->link;
1550 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001551 u8 command = tf->command;
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001552 int auto_timeout = 0;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001553 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001554 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001555 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001556 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001557 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001558 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001559 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001560 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001561
Jeff Garzikba6a1302006-06-22 23:46:10 -04001562 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001563
Tejun Heoe3180492006-05-15 20:58:09 +09001564 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001565 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001566 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001567 return AC_ERR_SYSTEM;
1568 }
1569
Tejun Heo2ab7db12006-05-15 20:58:02 +09001570 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001571
Tejun Heo2ab7db12006-05-15 20:58:02 +09001572 /* XXX: Tag 0 is used for drivers with legacy EH as some
1573 * drivers choke if any other tag is given. This breaks
1574 * ata_tag_internal() test for those drivers. Don't use new
1575 * EH stuff without converting to it.
1576 */
1577 if (ap->ops->error_handler)
1578 tag = ATA_TAG_INTERNAL;
1579 else
1580 tag = 0;
1581
Tejun Heo8a8bc222008-11-10 14:48:21 +09001582 if (test_and_set_bit(tag, &ap->qc_allocated))
1583 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001584 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001585
1586 qc->tag = tag;
1587 qc->scsicmd = NULL;
1588 qc->ap = ap;
1589 qc->dev = dev;
1590 ata_qc_reinit(qc);
1591
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001592 preempted_tag = link->active_tag;
1593 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001594 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001595 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001596 link->active_tag = ATA_TAG_POISON;
1597 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001598 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001599 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001600
1601 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001602 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001603 if (cdb)
1604 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001605 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001606 qc->dma_dir = dma_dir;
1607 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001608 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001609 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001610
Jens Axboe87260212007-10-16 11:14:12 +02001611 for_each_sg(sgl, sg, n_elem, i)
1612 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001613
Jens Axboe87260212007-10-16 11:14:12 +02001614 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001615 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001616 }
1617
Tejun Heo77853bf2006-01-23 13:09:36 +09001618 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001619 qc->complete_fn = ata_qc_complete_internal;
1620
Tejun Heo8e0e6942006-03-31 20:41:11 +09001621 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001622
Jeff Garzikba6a1302006-06-22 23:46:10 -04001623 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001624
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001625 if (!timeout) {
1626 if (ata_probe_timeout)
1627 timeout = ata_probe_timeout * 1000;
1628 else {
1629 timeout = ata_internal_cmd_timeout(dev, command);
1630 auto_timeout = 1;
1631 }
1632 }
Tejun Heo2b789102007-10-09 15:05:44 +09001633
Tejun Heoc0c362b2010-09-06 17:57:14 +02001634 if (ap->ops->error_handler)
1635 ata_eh_release(ap);
1636
Tejun Heo2b789102007-10-09 15:05:44 +09001637 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001638
Tejun Heoc0c362b2010-09-06 17:57:14 +02001639 if (ap->ops->error_handler)
1640 ata_eh_acquire(ap);
1641
Tejun Heoc4291372010-05-10 21:41:38 +02001642 ata_sff_flush_pio_task(ap);
Tejun Heod95a7172006-05-15 20:58:14 +09001643
1644 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001645 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001646
1647 /* We're racing with irq here. If we lose, the
1648 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001649 * twice. If we win, the port is frozen and will be
1650 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001651 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001652 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001653 qc->err_mask |= AC_ERR_TIMEOUT;
1654
1655 if (ap->ops->error_handler)
1656 ata_port_freeze(ap);
1657 else
1658 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001659
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001660 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07001661 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1662 command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001663 }
1664
Jeff Garzikba6a1302006-06-22 23:46:10 -04001665 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001666 }
1667
Tejun Heod95a7172006-05-15 20:58:14 +09001668 /* do post_internal_cmd */
1669 if (ap->ops->post_internal_cmd)
1670 ap->ops->post_internal_cmd(qc);
1671
Tejun Heoa51d6442007-03-20 15:24:11 +09001672 /* perform minimal error analysis */
1673 if (qc->flags & ATA_QCFLAG_FAILED) {
1674 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1675 qc->err_mask |= AC_ERR_DEV;
1676
1677 if (!qc->err_mask)
1678 qc->err_mask |= AC_ERR_OTHER;
1679
1680 if (qc->err_mask & ~AC_ERR_OTHER)
1681 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001682 }
1683
Tejun Heo15869302006-05-15 20:57:33 +09001684 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001685 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001686
Tejun Heoe61e0672006-05-15 20:57:40 +09001687 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001688 err_mask = qc->err_mask;
1689
1690 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001691 link->active_tag = preempted_tag;
1692 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001693 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001694 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001695
Jeff Garzikba6a1302006-06-22 23:46:10 -04001696 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001697
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001698 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1699 ata_internal_cmd_timed_out(dev, command);
1700
Tejun Heo77853bf2006-01-23 13:09:36 +09001701 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001702}
1703
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704/**
Tejun Heo33480a02006-12-12 02:15:31 +09001705 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001706 * @dev: Device to which the command is sent
1707 * @tf: Taskfile registers for the command and the result
1708 * @cdb: CDB for packet command
1709 * @dma_dir: Data tranfer direction of the command
1710 * @buf: Data buffer of the command
1711 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001712 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001713 *
1714 * Wrapper around ata_exec_internal_sg() which takes simple
1715 * buffer instead of sg list.
1716 *
1717 * LOCKING:
1718 * None. Should be called with kernel context, might sleep.
1719 *
1720 * RETURNS:
1721 * Zero on success, AC_ERR_* mask on failure
1722 */
1723unsigned ata_exec_internal(struct ata_device *dev,
1724 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001725 int dma_dir, void *buf, unsigned int buflen,
1726 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001727{
Tejun Heo33480a02006-12-12 02:15:31 +09001728 struct scatterlist *psg = NULL, sg;
1729 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001730
Tejun Heo33480a02006-12-12 02:15:31 +09001731 if (dma_dir != DMA_NONE) {
1732 WARN_ON(!buf);
1733 sg_init_one(&sg, buf, buflen);
1734 psg = &sg;
1735 n_elem++;
1736 }
Tejun Heo24326972006-11-14 22:47:09 +09001737
Tejun Heo2b789102007-10-09 15:05:44 +09001738 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1739 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001740}
1741
1742/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001743 * ata_do_simple_cmd - execute simple internal command
1744 * @dev: Device to which the command is sent
1745 * @cmd: Opcode to execute
1746 *
1747 * Execute a 'simple' command, that only consists of the opcode
1748 * 'cmd' itself, without filling any other registers
1749 *
1750 * LOCKING:
1751 * Kernel thread context (may sleep).
1752 *
1753 * RETURNS:
1754 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001755 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001756unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001757{
1758 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001759
1760 ata_tf_init(dev, &tf);
1761
1762 tf.command = cmd;
1763 tf.flags |= ATA_TFLAG_DEVICE;
1764 tf.protocol = ATA_PROT_NODATA;
1765
Tejun Heo2b789102007-10-09 15:05:44 +09001766 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001767}
1768
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001770 * ata_pio_need_iordy - check if iordy needed
1771 * @adev: ATA device
1772 *
1773 * Check if the current speed of the device requires IORDY. Used
1774 * by various controllers for chip configuration.
1775 */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001776unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1777{
Tejun Heo0d9e6652009-06-11 11:04:45 +09001778 /* Don't set IORDY if we're preparing for reset. IORDY may
1779 * lead to controller lock up on certain controllers if the
1780 * port is not occupied. See bko#11703 for details.
1781 */
1782 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1783 return 0;
1784 /* Controller doesn't support IORDY. Probably a pointless
1785 * check as the caller should know this.
1786 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001787 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001788 return 0;
David Daney5c18c4d2008-12-10 15:39:12 -08001789 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1790 if (ata_id_is_cfa(adev->id)
1791 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1792 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001793 /* PIO3 and higher it is mandatory */
1794 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001795 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001796 /* We turn it on when possible */
1797 if (ata_id_has_iordy(adev->id))
1798 return 1;
1799 return 0;
1800}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001801
Alan Cox432729f2007-03-08 23:22:59 +00001802/**
1803 * ata_pio_mask_no_iordy - Return the non IORDY mask
1804 * @adev: ATA device
1805 *
1806 * Compute the highest mode possible if we are not using iordy. Return
1807 * -1 if no iordy mode is available.
1808 */
Alan Cox432729f2007-03-08 23:22:59 +00001809static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1810{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001811 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001812 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001813 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001814 /* Is the speed faster than the drive allows non IORDY ? */
1815 if (pio) {
1816 /* This is cycle times not frequency - watch the logic! */
1817 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001818 return 3 << ATA_SHIFT_PIO;
1819 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001820 }
1821 }
Alan Cox432729f2007-03-08 23:22:59 +00001822 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001823}
1824
1825/**
Alan Cox963e4972008-07-24 17:16:06 +01001826 * ata_do_dev_read_id - default ID read method
1827 * @dev: device
1828 * @tf: proposed taskfile
1829 * @id: data buffer
1830 *
1831 * Issue the identify taskfile and hand back the buffer containing
1832 * identify data. For some RAID controllers and for pre ATA devices
1833 * this function is wrapped or replaced by the driver
1834 */
1835unsigned int ata_do_dev_read_id(struct ata_device *dev,
1836 struct ata_taskfile *tf, u16 *id)
1837{
1838 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1839 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1840}
1841
1842/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001843 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001844 * @dev: target device
1845 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001846 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001847 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001848 *
1849 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1850 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001851 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1852 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001853 *
Alan Cox50a99012007-08-08 14:27:00 +01001854 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001855 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01001856 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001857 * LOCKING:
1858 * Kernel thread context (may sleep)
1859 *
1860 * RETURNS:
1861 * 0 on success, -errno otherwise.
1862 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001863int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001864 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001865{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001866 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001867 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001868 struct ata_taskfile tf;
1869 unsigned int err_mask = 0;
1870 const char *reason;
Tejun Heo79b42ba2009-04-15 06:21:10 +09001871 bool is_semb = class == ATA_DEV_SEMB;
Tejun Heo54936f82007-05-11 14:35:29 +02001872 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09001873 int rc;
1874
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001875 if (ata_msg_ctl(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07001876 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001877
Alan Cox963e4972008-07-24 17:16:06 +01001878retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001879 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001880
1881 switch (class) {
Tejun Heo79b42ba2009-04-15 06:21:10 +09001882 case ATA_DEV_SEMB:
1883 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
Tejun Heo49016ac2006-02-21 02:12:11 +09001884 case ATA_DEV_ATA:
1885 tf.command = ATA_CMD_ID_ATA;
1886 break;
1887 case ATA_DEV_ATAPI:
1888 tf.command = ATA_CMD_ID_ATAPI;
1889 break;
1890 default:
1891 rc = -ENODEV;
1892 reason = "unsupported class";
1893 goto err_out;
1894 }
1895
1896 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001897
1898 /* Some devices choke if TF registers contain garbage. Make
1899 * sure those are properly initialized.
1900 */
1901 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1902
1903 /* Device presence detection is unreliable on some
1904 * controllers. Always poll IDENTIFY if available.
1905 */
1906 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001907
Alan Cox963e4972008-07-24 17:16:06 +01001908 if (ap->ops->read_id)
1909 err_mask = ap->ops->read_id(dev, &tf, id);
1910 else
1911 err_mask = ata_do_dev_read_id(dev, &tf, id);
1912
Tejun Heo49016ac2006-02-21 02:12:11 +09001913 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001914 if (err_mask & AC_ERR_NODEV_HINT) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001915 ata_dev_dbg(dev, "NODEV after polling detection\n");
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001916 return -ENOENT;
1917 }
1918
Tejun Heo79b42ba2009-04-15 06:21:10 +09001919 if (is_semb) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001920 ata_dev_info(dev,
1921 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
Tejun Heo79b42ba2009-04-15 06:21:10 +09001922 /* SEMB is not supported yet */
1923 *p_class = ATA_DEV_SEMB_UNSUP;
1924 return 0;
1925 }
1926
Tejun Heo1ffc1512008-03-23 15:16:53 +09001927 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1928 /* Device or controller might have reported
1929 * the wrong device class. Give a shot at the
1930 * other IDENTIFY if the current one is
1931 * aborted by the device.
1932 */
1933 if (may_fallback) {
1934 may_fallback = 0;
Tejun Heo54936f82007-05-11 14:35:29 +02001935
Tejun Heo1ffc1512008-03-23 15:16:53 +09001936 if (class == ATA_DEV_ATA)
1937 class = ATA_DEV_ATAPI;
1938 else
1939 class = ATA_DEV_ATA;
1940 goto retry;
1941 }
1942
1943 /* Control reaches here iff the device aborted
1944 * both flavors of IDENTIFYs which happens
1945 * sometimes with phantom devices.
1946 */
Joe Perchesa9a79df2011-04-15 15:51:59 -07001947 ata_dev_dbg(dev,
1948 "both IDENTIFYs aborted, assuming NODEV\n");
Tejun Heo1ffc1512008-03-23 15:16:53 +09001949 return -ENOENT;
Tejun Heo54936f82007-05-11 14:35:29 +02001950 }
1951
Tejun Heo49016ac2006-02-21 02:12:11 +09001952 rc = -EIO;
1953 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001954 goto err_out;
1955 }
1956
Tejun Heo43c9c592010-05-23 12:59:11 +02001957 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07001958 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1959 "class=%d may_fallback=%d tried_spinup=%d\n",
1960 class, may_fallback, tried_spinup);
Tejun Heo43c9c592010-05-23 12:59:11 +02001961 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1962 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1963 }
1964
Tejun Heo54936f82007-05-11 14:35:29 +02001965 /* Falling back doesn't make sense if ID data was read
1966 * successfully at least once.
1967 */
1968 may_fallback = 0;
1969
Tejun Heo49016ac2006-02-21 02:12:11 +09001970 swap_buf_le16(id, ATA_ID_WORDS);
1971
Tejun Heo49016ac2006-02-21 02:12:11 +09001972 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001973 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01001974 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07001975
1976 if (class == ATA_DEV_ATA) {
1977 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1978 goto err_out;
Andy Whitcroftdb63a4c2012-05-04 22:15:10 +01001979 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1980 ata_id_is_ata(id)) {
1981 ata_dev_dbg(dev,
1982 "host indicates ignore ATA devices, ignored\n");
1983 return -ENOENT;
1984 }
Tejun Heoa4f57492006-09-12 20:35:49 -07001985 } else {
1986 if (ata_id_is_ata(id))
1987 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001988 }
1989
Mark Lord169439c2007-04-17 18:26:07 -04001990 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1991 tried_spinup = 1;
1992 /*
1993 * Drive powered-up in standby mode, and requires a specific
1994 * SET_FEATURES spin-up subcommand before it will accept
1995 * anything other than the original IDENTIFY command.
1996 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04001997 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07001998 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04001999 rc = -EIO;
2000 reason = "SPINUP failed";
2001 goto err_out;
2002 }
2003 /*
2004 * If the drive initially returned incomplete IDENTIFY info,
2005 * we now must reissue the IDENTIFY command.
2006 */
2007 if (id[2] == 0x37c8)
2008 goto retry;
2009 }
2010
Tejun Heobff04642006-11-10 18:08:10 +09002011 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09002012 /*
2013 * The exact sequence expected by certain pre-ATA4 drives is:
2014 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01002015 * IDENTIFY (optional in early ATA)
2016 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09002017 * anything else..
2018 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01002019 *
2020 * Note that ATA4 says lba is mandatory so the second check
Adam Buchbinderc9404c92009-12-18 15:40:42 -05002021 * should never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09002022 */
2023 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09002024 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09002025 if (err_mask) {
2026 rc = -EIO;
2027 reason = "INIT_DEV_PARAMS failed";
2028 goto err_out;
2029 }
2030
2031 /* current CHS translation info (id[53-58]) might be
2032 * changed. reread the identify device info.
2033 */
Tejun Heobff04642006-11-10 18:08:10 +09002034 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09002035 goto retry;
2036 }
2037 }
2038
2039 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09002040
Tejun Heo49016ac2006-02-21 02:12:11 +09002041 return 0;
2042
2043 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09002044 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002045 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2046 reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002047 return rc;
2048}
2049
Tejun Heo90627122009-01-29 20:31:36 +09002050static int ata_do_link_spd_horkage(struct ata_device *dev)
2051{
2052 struct ata_link *plink = ata_dev_phys_link(dev);
2053 u32 target, target_limit;
2054
2055 if (!sata_scr_valid(plink))
2056 return 0;
2057
2058 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2059 target = 1;
2060 else
2061 return 0;
2062
2063 target_limit = (1 << target) - 1;
2064
2065 /* if already on stricter limit, no need to push further */
2066 if (plink->sata_spd_limit <= target_limit)
2067 return 0;
2068
2069 plink->sata_spd_limit = target_limit;
2070
2071 /* Request another EH round by returning -EAGAIN if link is
2072 * going faster than the target speed. Forward progress is
2073 * guaranteed by setting sata_spd_limit to target_limit above.
2074 */
2075 if (plink->sata_spd > target) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002076 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2077 sata_spd_string(target));
Tejun Heo90627122009-01-29 20:31:36 +09002078 return -EAGAIN;
2079 }
2080 return 0;
2081}
2082
Tejun Heo3373efd2006-05-15 20:57:53 +09002083static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002084{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002085 struct ata_port *ap = dev->link->ap;
Jens Axboe9ce8e302008-08-27 15:23:18 +02002086
2087 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2088 return 0;
2089
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002090 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002091}
2092
Shaohua Li388539f2009-07-27 09:24:35 +08002093static int ata_dev_config_ncq(struct ata_device *dev,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002094 char *desc, size_t desc_sz)
2095{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002096 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002097 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
Shaohua Li388539f2009-07-27 09:24:35 +08002098 unsigned int err_mask;
2099 char *aa_desc = "";
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002100
2101 if (!ata_id_has_ncq(dev->id)) {
2102 desc[0] = '\0';
Shaohua Li388539f2009-07-27 09:24:35 +08002103 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002104 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002105 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002106 snprintf(desc, desc_sz, "NCQ (not used)");
Shaohua Li388539f2009-07-27 09:24:35 +08002107 return 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07002108 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002109 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002110 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002111 dev->flags |= ATA_DFLAG_NCQ;
2112 }
2113
Shaohua Li388539f2009-07-27 09:24:35 +08002114 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2115 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2116 ata_id_has_fpdma_aa(dev->id)) {
2117 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2118 SATA_FPDMA_AA);
2119 if (err_mask) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002120 ata_dev_err(dev,
2121 "failed to enable AA (error_mask=0x%x)\n",
2122 err_mask);
Shaohua Li388539f2009-07-27 09:24:35 +08002123 if (err_mask != AC_ERR_DEV) {
2124 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2125 return -EIO;
2126 }
2127 } else
2128 aa_desc = ", AA";
2129 }
2130
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002131 if (hdepth >= ddepth)
Shaohua Li388539f2009-07-27 09:24:35 +08002132 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002133 else
Shaohua Li388539f2009-07-27 09:24:35 +08002134 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2135 ddepth, aa_desc);
2136 return 0;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002137}
2138
Tejun Heo49016ac2006-02-21 02:12:11 +09002139/**
Tejun Heoffeae412006-03-01 16:09:35 +09002140 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002141 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 *
Tejun Heoffeae412006-03-01 16:09:35 +09002143 * Configure @dev according to @dev->id. Generic and low-level
2144 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 *
2146 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002147 * Kernel thread context (may sleep)
2148 *
2149 * RETURNS:
2150 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002152int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002154 struct ata_port *ap = dev->link->ap;
2155 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002156 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002157 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002158 unsigned long xfer_mask;
Shane Huang65fe1f02012-09-07 22:40:01 +08002159 unsigned int err_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002160 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002161 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2162 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002163 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002165 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002166 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002167 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 }
2169
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002170 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002171 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172
Tejun Heo75683fe2007-07-05 13:31:27 +09002173 /* set horkage */
2174 dev->horkage |= ata_dev_blacklisted(dev);
Tejun Heo33267322008-02-13 09:15:09 +09002175 ata_force_horkage(dev);
Tejun Heo75683fe2007-07-05 13:31:27 +09002176
Tejun Heo50af2fa2008-05-19 01:15:14 +09002177 if (dev->horkage & ATA_HORKAGE_DISABLE) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002178 ata_dev_info(dev, "unsupported device, disabling\n");
Tejun Heo50af2fa2008-05-19 01:15:14 +09002179 ata_dev_disable(dev);
2180 return 0;
2181 }
2182
Tejun Heo2486fa52008-07-31 07:52:40 +09002183 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2184 dev->class == ATA_DEV_ATAPI) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002185 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2186 atapi_enabled ? "not supported with this driver"
2187 : "disabled");
Tejun Heo2486fa52008-07-31 07:52:40 +09002188 ata_dev_disable(dev);
2189 return 0;
2190 }
2191
Tejun Heo90627122009-01-29 20:31:36 +09002192 rc = ata_do_link_spd_horkage(dev);
2193 if (rc)
2194 return rc;
2195
Tejun Heo67465442007-05-15 03:28:16 +09002196 /* let ACPI work its magic */
2197 rc = ata_acpi_on_devcfg(dev);
2198 if (rc)
2199 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002200
Tejun Heo05027ad2007-09-03 12:32:57 +09002201 /* massage HPA, do it early as it might change IDENTIFY data */
2202 rc = ata_hpa_resize(dev);
2203 if (rc)
2204 return rc;
2205
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002206 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002207 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002208 ata_dev_dbg(dev,
2209 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2210 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2211 __func__,
2212 id[49], id[82], id[83], id[84],
2213 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002214
Tejun Heo208a9932006-03-05 17:55:58 +09002215 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002216 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002217 dev->max_sectors = 0;
2218 dev->cdb_len = 0;
2219 dev->n_sectors = 0;
2220 dev->cylinders = 0;
2221 dev->heads = 0;
2222 dev->sectors = 0;
Mark Lorde18086d2009-03-19 13:32:21 -04002223 dev->multi_count = 0;
Tejun Heo208a9932006-03-05 17:55:58 +09002224
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 /*
2226 * common ATA, ATAPI feature tests
2227 */
2228
Tejun Heoff8854b2006-03-06 04:31:56 +09002229 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002230 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002232 if (ata_msg_probe(ap))
2233 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
Albert Leeef143d52007-06-05 13:01:33 +08002235 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2236 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2237 sizeof(fwrevbuf));
2238
2239 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2240 sizeof(modelbuf));
2241
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 /* ATA-specific feature tests */
2243 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002244 if (ata_id_is_cfa(id)) {
Sergei Shtylyov62afe5d2009-04-13 20:50:00 +04002245 /* CPRM may make this media unusable */
2246 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002247 ata_dev_warn(dev,
2248 "supports DRM functions and may not be fully accessible\n");
Alan Coxb352e572006-08-10 18:52:12 +01002249 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002250 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002251 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002252 /* Warn the user if the device has TPM extensions */
2253 if (ata_id_has_tpm(id))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002254 ata_dev_warn(dev,
2255 "supports DRM functions and may not be fully accessible\n");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002256 }
Alan Coxb352e572006-08-10 18:52:12 +01002257
Tejun Heo1148c3a2006-03-13 19:48:04 +09002258 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002259
Mark Lorde18086d2009-03-19 13:32:21 -04002260 /* get current R/W Multiple count setting */
2261 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2262 unsigned int max = dev->id[47] & 0xff;
2263 unsigned int cnt = dev->id[59] & 0xff;
2264 /* only recognize/allow powers of two here */
2265 if (is_power_of_2(max) && is_power_of_2(cnt))
2266 if (cnt <= max)
2267 dev->multi_count = cnt;
2268 }
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002269
Tejun Heo1148c3a2006-03-13 19:48:04 +09002270 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002271 const char *lba_desc;
Shaohua Li388539f2009-07-27 09:24:35 +08002272 char ncq_desc[24];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002273
Tejun Heo4c2d7212006-03-05 17:55:58 +09002274 lba_desc = "LBA";
2275 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002276 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002277 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002278 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002279
2280 if (dev->n_sectors >= (1UL << 28) &&
2281 ata_id_has_flush_ext(id))
2282 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002283 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04002284
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002285 /* config NCQ */
Shaohua Li388539f2009-07-27 09:24:35 +08002286 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2287 if (rc)
2288 return rc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002289
Albert Lee8bf62ece2005-05-12 15:29:42 -04002290 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002291 if (ata_msg_drv(ap) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002292 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2293 revbuf, modelbuf, fwrevbuf,
2294 ata_mode_string(xfer_mask));
2295 ata_dev_info(dev,
2296 "%llu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002297 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002298 dev->multi_count, lba_desc, ncq_desc);
2299 }
Tejun Heoffeae412006-03-01 16:09:35 +09002300 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002301 /* CHS */
2302
2303 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002304 dev->cylinders = id[1];
2305 dev->heads = id[3];
2306 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002307
Tejun Heo1148c3a2006-03-13 19:48:04 +09002308 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002309 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002310 dev->cylinders = id[54];
2311 dev->heads = id[55];
2312 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002313 }
2314
2315 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002316 if (ata_msg_drv(ap) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002317 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2318 revbuf, modelbuf, fwrevbuf,
2319 ata_mode_string(xfer_mask));
2320 ata_dev_info(dev,
2321 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2322 (unsigned long long)dev->n_sectors,
2323 dev->multi_count, dev->cylinders,
2324 dev->heads, dev->sectors);
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002325 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002326 }
2327
Shane Huang803739d2012-12-17 23:18:59 +08002328 /* Check and mark DevSlp capability. Get DevSlp timing variables
2329 * from SATA Settings page of Identify Device Data Log.
Shane Huang65fe1f02012-09-07 22:40:01 +08002330 */
Shane Huang803739d2012-12-17 23:18:59 +08002331 if (ata_id_has_devslp(dev->id)) {
2332 u8 sata_setting[ATA_SECT_SIZE];
2333 int i, j;
2334
2335 dev->flags |= ATA_DFLAG_DEVSLP;
Shane Huang65fe1f02012-09-07 22:40:01 +08002336 err_mask = ata_read_log_page(dev,
2337 ATA_LOG_SATA_ID_DEV_DATA,
2338 ATA_LOG_SATA_SETTINGS,
Shane Huang803739d2012-12-17 23:18:59 +08002339 sata_setting,
Shane Huang65fe1f02012-09-07 22:40:01 +08002340 1);
2341 if (err_mask)
2342 ata_dev_dbg(dev,
2343 "failed to get Identify Device Data, Emask 0x%x\n",
2344 err_mask);
Shane Huang803739d2012-12-17 23:18:59 +08002345 else
2346 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2347 j = ATA_LOG_DEVSLP_OFFSET + i;
2348 dev->devslp_timing[i] = sata_setting[j];
2349 }
Shane Huang65fe1f02012-09-07 22:40:01 +08002350 }
2351
Tejun Heo6e7846e2006-02-12 23:32:58 +09002352 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 }
2354
2355 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002356 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002357 const char *cdb_intr_string = "";
2358 const char *atapi_an_string = "";
Tejun Heo91163002008-02-21 13:25:50 +09002359 const char *dma_dir_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002360 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002361
Tejun Heo1148c3a2006-03-13 19:48:04 +09002362 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002364 if (ata_msg_warn(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002365 ata_dev_warn(dev, "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002366 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367 goto err_out_nosup;
2368 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002369 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370
Tejun Heo7d77b242007-09-23 13:14:13 +09002371 /* Enable ATAPI AN if both the host and device have
2372 * the support. If PMP is attached, SNTF is required
2373 * to enable ATAPI AN to discern between PHY status
2374 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002375 */
Tejun Heoe7ecd432010-05-19 15:38:58 +02002376 if (atapi_an &&
2377 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
Tejun Heo071f44b2008-04-07 22:47:22 +09002378 (!sata_pmp_attached(ap) ||
Tejun Heo7d77b242007-09-23 13:14:13 +09002379 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002380 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002381 err_mask = ata_dev_set_feature(dev,
2382 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002383 if (err_mask)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002384 ata_dev_err(dev,
2385 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2386 err_mask);
Tejun Heo854c73a2007-09-23 13:14:11 +09002387 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002388 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002389 atapi_an_string = ", ATAPI AN";
2390 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002391 }
2392
Albert Lee08a556d2006-03-31 13:29:04 +08002393 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002394 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002395 cdb_intr_string = ", CDB intr";
2396 }
Albert Lee312f7da2005-09-27 17:38:03 +08002397
Tejun Heo91163002008-02-21 13:25:50 +09002398 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2399 dev->flags |= ATA_DFLAG_DMADIR;
2400 dma_dir_string = ", DMADIR";
2401 }
2402
Lin Mingb1354cb2012-06-25 16:13:08 +08002403 if (ata_id_has_da(dev->id))
2404 dev->flags |= ATA_DFLAG_DA;
2405
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002407 if (ata_msg_drv(ap) && print_info)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002408 ata_dev_info(dev,
2409 "ATAPI: %s, %s, max %s%s%s%s\n",
2410 modelbuf, fwrevbuf,
2411 ata_mode_string(xfer_mask),
2412 cdb_intr_string, atapi_an_string,
2413 dma_dir_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 }
2415
Tejun Heo914ed352006-11-01 18:39:55 +09002416 /* determine max_sectors */
2417 dev->max_sectors = ATA_MAX_SECTORS;
2418 if (dev->flags & ATA_DFLAG_LBA48)
2419 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2420
Alan Coxc5038fc2007-10-25 14:21:16 +01002421 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2422 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002423 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002424 if (ata_msg_drv(ap) && print_info)
Joe Perchesa9a79df2011-04-15 15:51:59 -07002425 ata_dev_info(dev, "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002426 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002427 dev->max_sectors = ATA_MAX_SECTORS;
2428 }
2429
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002430 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002431 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002432 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002433 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2434 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002435
Tejun Heo75683fe2007-07-05 13:31:27 +09002436 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002437 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2438 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002439
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002440 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002441 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002442
Alan Coxc5038fc2007-10-25 14:21:16 +01002443 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2444 /* Let the user know. We don't want to disallow opens for
2445 rescue purposes, or in case the vendor is just a blithering
2446 idiot. Do this after the dev_config call as some controllers
2447 with buggy firmware may want to avoid reporting false device
2448 bugs */
2449
2450 if (print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002451 ata_dev_warn(dev,
Alan Coxc5038fc2007-10-25 14:21:16 +01002452"Drive reports diagnostics failure. This may indicate a drive\n");
Joe Perchesa9a79df2011-04-15 15:51:59 -07002453 ata_dev_warn(dev,
Alan Coxc5038fc2007-10-25 14:21:16 +01002454"fault or invalid emulation. Contact drive vendor for information.\n");
2455 }
2456 }
2457
Tejun Heoac70a962008-11-27 13:36:48 +09002458 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002459 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2460 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
Tejun Heoac70a962008-11-27 13:36:48 +09002461 }
2462
Tejun Heoffeae412006-03-01 16:09:35 +09002463 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464
2465err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002466 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -07002467 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002468 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469}
2470
2471/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002472 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002473 * @ap: port
2474 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002475 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002476 * detection.
2477 */
2478
2479int ata_cable_40wire(struct ata_port *ap)
2480{
2481 return ATA_CBL_PATA40;
2482}
2483
2484/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002485 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002486 * @ap: port
2487 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002488 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002489 * detection.
2490 */
2491
2492int ata_cable_80wire(struct ata_port *ap)
2493{
2494 return ATA_CBL_PATA80;
2495}
2496
2497/**
2498 * ata_cable_unknown - return unknown PATA cable.
2499 * @ap: port
2500 *
2501 * Helper method for drivers which have no PATA cable detection.
2502 */
2503
2504int ata_cable_unknown(struct ata_port *ap)
2505{
2506 return ATA_CBL_PATA_UNK;
2507}
2508
2509/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002510 * ata_cable_ignore - return ignored PATA cable.
2511 * @ap: port
2512 *
2513 * Helper method for drivers which don't use cable type to limit
2514 * transfer mode.
2515 */
2516int ata_cable_ignore(struct ata_port *ap)
2517{
2518 return ATA_CBL_PATA_IGN;
2519}
2520
2521/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002522 * ata_cable_sata - return SATA cable type
2523 * @ap: port
2524 *
2525 * Helper method for drivers which have SATA cables
2526 */
2527
2528int ata_cable_sata(struct ata_port *ap)
2529{
2530 return ATA_CBL_SATA;
2531}
2532
2533/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534 * ata_bus_probe - Reset and probe ATA bus
2535 * @ap: Bus to probe
2536 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002537 * Master ATA bus probing function. Initiates a hardware-dependent
2538 * bus reset, then attempts to identify any devices found on
2539 * the bus.
2540 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002542 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543 *
2544 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002545 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546 */
2547
Brian King80289162006-08-07 14:27:31 -05002548int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002550 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002551 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002552 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002553 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554
Tejun Heo1eca4362008-11-03 20:03:17 +09002555 ata_for_each_dev(dev, &ap->link, ALL)
Tejun Heof58229f2007-08-06 18:36:23 +09002556 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002557
2558 retry:
Tejun Heo1eca4362008-11-03 20:03:17 +09002559 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heocdeab112007-10-29 16:41:09 +09002560 /* If we issue an SRST then an ATA drive (not ATAPI)
2561 * may change configuration and be in PIO0 timing. If
2562 * we do a hard reset (or are coming from power on)
2563 * this is true for ATA or ATAPI. Until we've set a
2564 * suitable controller mode we should not touch the
2565 * bus as we may be talking too fast.
2566 */
2567 dev->pio_mode = XFER_PIO_0;
Aaron Lu54169122012-12-03 11:35:02 +08002568 dev->dma_mode = 0xff;
Tejun Heocdeab112007-10-29 16:41:09 +09002569
2570 /* If the controller has a pio mode setup function
2571 * then use it to set the chipset to rights. Don't
2572 * touch the DMA setup as that will be dealt with when
2573 * configuring devices.
2574 */
2575 if (ap->ops->set_piomode)
2576 ap->ops->set_piomode(ap, dev);
2577 }
2578
Tejun Heo20444702006-03-13 01:57:01 +09002579 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002580 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002581
Tejun Heo1eca4362008-11-03 20:03:17 +09002582 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo3e4ec342010-05-10 21:41:30 +02002583 if (dev->class != ATA_DEV_UNKNOWN)
Tejun Heo52783c52006-05-31 18:28:22 +09002584 classes[dev->devno] = dev->class;
2585 else
2586 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002587
Tejun Heo52783c52006-05-31 18:28:22 +09002588 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002589 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002590
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002591 /* read IDENTIFY page and configure devices. We have to do the identify
2592 specific sequence bass-ackwards so that PDIAG- is released by
2593 the slave device */
2594
Tejun Heo1eca4362008-11-03 20:03:17 +09002595 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
Tejun Heof58229f2007-08-06 18:36:23 +09002596 if (tries[dev->devno])
2597 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002598
Tejun Heoe1211e32006-04-01 01:38:18 +09002599 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002600 continue;
2601
Tejun Heobff04642006-11-10 18:08:10 +09002602 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2603 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002604 if (rc)
2605 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002606 }
2607
Alan Coxbe0d18d2007-03-06 02:37:56 -08002608 /* Now ask for the cable type as PDIAG- should have been released */
2609 if (ap->ops->cable_detect)
2610 ap->cbl = ap->ops->cable_detect(ap);
2611
Tejun Heo1eca4362008-11-03 20:03:17 +09002612 /* We may have SATA bridge glue hiding here irrespective of
2613 * the reported cable types and sensed types. When SATA
2614 * drives indicate we have a bridge, we don't know which end
2615 * of the link the bridge is which is a problem.
2616 */
2617 ata_for_each_dev(dev, &ap->link, ENABLED)
Alan Cox614fe292007-08-22 23:22:45 +01002618 if (ata_id_is_sata(dev->id))
2619 ap->cbl = ATA_CBL_SATA;
Alan Cox614fe292007-08-22 23:22:45 +01002620
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002621 /* After the identify sequence we can now set up the devices. We do
2622 this in the normal order so that the user doesn't get confused */
2623
Tejun Heo1eca4362008-11-03 20:03:17 +09002624 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002625 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002626 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002627 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002628 if (rc)
2629 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630 }
2631
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002632 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002633 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002634 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002635 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002636
Tejun Heo1eca4362008-11-03 20:03:17 +09002637 ata_for_each_dev(dev, &ap->link, ENABLED)
2638 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002639
Tejun Heo96072e62006-04-01 01:38:17 +09002640 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002641
2642 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002643 tries[dev->devno]--;
2644
Tejun Heo14d2bac2006-04-02 17:54:46 +09002645 switch (rc) {
2646 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002647 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002648 tries[dev->devno] = 0;
2649 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002650
2651 case -ENODEV:
2652 /* give it just one more chance */
2653 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002654 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002655 if (tries[dev->devno] == 1) {
2656 /* This is the last chance, better to slow
2657 * down than lose it.
2658 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002659 sata_down_spd_limit(&ap->link, 0);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002660 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2661 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002662 }
2663
Tejun Heo4ae72a12007-02-02 16:22:30 +09002664 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002665 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002666
Tejun Heo14d2bac2006-04-02 17:54:46 +09002667 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668}
2669
2670/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002671 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002672 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002673 *
2674 * This function prints link speed and status of a SATA link.
2675 *
2676 * LOCKING:
2677 * None.
2678 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002679static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002680{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002681 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002682
Tejun Heo936fd732007-08-06 18:36:23 +09002683 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002684 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002685 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002686
Tejun Heob1c72912008-07-31 17:02:43 +09002687 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002688 tmp = (sstatus >> 4) & 0xf;
Joe Perchesa9a79df2011-04-15 15:51:59 -07002689 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2690 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002691 } else {
Joe Perchesa9a79df2011-04-15 15:51:59 -07002692 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2693 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002694 }
2695}
2696
2697/**
Alan Coxebdfca62006-03-23 15:38:34 +00002698 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002699 * @adev: device
2700 *
2701 * Obtain the other device on the same cable, or if none is
2702 * present NULL is returned
2703 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002704
Tejun Heo3373efd2006-05-15 20:57:53 +09002705struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002706{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002707 struct ata_link *link = adev->link;
2708 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002709 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002710 return NULL;
2711 return pair;
2712}
2713
2714/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002715 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002716 * @link: Link to adjust SATA spd limit for
Tejun Heoa07d4992009-01-29 20:31:33 +09002717 * @spd_limit: Additional limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09002718 *
Tejun Heo936fd732007-08-06 18:36:23 +09002719 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002720 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002721 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002722 *
Tejun Heoa07d4992009-01-29 20:31:33 +09002723 * If @spd_limit is non-zero, the speed is limited to equal to or
2724 * lower than @spd_limit if such speed is supported. If
2725 * @spd_limit is slower than any supported speed, only the lowest
2726 * supported speed is allowed.
2727 *
Tejun Heo1c3fae42006-04-02 20:53:28 +09002728 * LOCKING:
2729 * Inherited from caller.
2730 *
2731 * RETURNS:
2732 * 0 on success, negative errno on failure
2733 */
Tejun Heoa07d4992009-01-29 20:31:33 +09002734int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002735{
Tejun Heo81952c52006-05-15 20:57:47 +09002736 u32 sstatus, spd, mask;
Tejun Heoa07d4992009-01-29 20:31:33 +09002737 int rc, bit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002738
Tejun Heo936fd732007-08-06 18:36:23 +09002739 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002740 return -EOPNOTSUPP;
2741
2742 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002743 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002744 */
Tejun Heo936fd732007-08-06 18:36:23 +09002745 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo9913ff82009-01-29 20:31:31 +09002746 if (rc == 0 && ata_sstatus_online(sstatus))
Tejun Heo008a7892007-07-16 14:29:40 +09002747 spd = (sstatus >> 4) & 0xf;
2748 else
Tejun Heo936fd732007-08-06 18:36:23 +09002749 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002750
Tejun Heo936fd732007-08-06 18:36:23 +09002751 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002752 if (mask <= 1)
2753 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002754
2755 /* unconditionally mask off the highest bit */
Tejun Heoa07d4992009-01-29 20:31:33 +09002756 bit = fls(mask) - 1;
2757 mask &= ~(1 << bit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002758
Tejun Heo008a7892007-07-16 14:29:40 +09002759 /* Mask off all speeds higher than or equal to the current
2760 * one. Force 1.5Gbps if current SPD is not available.
2761 */
2762 if (spd > 1)
2763 mask &= (1 << (spd - 1)) - 1;
2764 else
2765 mask &= 1;
2766
2767 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002768 if (!mask)
2769 return -EINVAL;
2770
Tejun Heoa07d4992009-01-29 20:31:33 +09002771 if (spd_limit) {
2772 if (mask & ((1 << spd_limit) - 1))
2773 mask &= (1 << spd_limit) - 1;
2774 else {
2775 bit = ffs(mask) - 1;
2776 mask = 1 << bit;
2777 }
2778 }
2779
Tejun Heo936fd732007-08-06 18:36:23 +09002780 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002781
Joe Perchesa9a79df2011-04-15 15:51:59 -07002782 ata_link_warn(link, "limiting SATA link speed to %s\n",
2783 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002784
2785 return 0;
2786}
2787
Tejun Heo936fd732007-08-06 18:36:23 +09002788static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002789{
Tejun Heo52702222007-10-31 10:17:07 +09002790 struct ata_link *host_link = &link->ap->link;
2791 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002792
Tejun Heo52702222007-10-31 10:17:07 +09002793 limit = link->sata_spd_limit;
2794
2795 /* Don't configure downstream link faster than upstream link.
2796 * It doesn't speed up anything and some PMPs choke on such
2797 * configuration.
2798 */
2799 if (!ata_is_host_link(link) && host_link->sata_spd)
2800 limit &= (1 << host_link->sata_spd) - 1;
2801
2802 if (limit == UINT_MAX)
2803 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002804 else
Tejun Heo52702222007-10-31 10:17:07 +09002805 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002806
2807 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002808 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002809
Tejun Heo52702222007-10-31 10:17:07 +09002810 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002811}
2812
2813/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002814 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002815 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002816 *
2817 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002818 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002819 * whether hardreset is necessary to apply SATA spd
2820 * configuration.
2821 *
2822 * LOCKING:
2823 * Inherited from caller.
2824 *
2825 * RETURNS:
2826 * 1 if SATA spd configuration is needed, 0 otherwise.
2827 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03002828static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002829{
2830 u32 scontrol;
2831
Tejun Heo936fd732007-08-06 18:36:23 +09002832 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002833 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002834
Tejun Heo936fd732007-08-06 18:36:23 +09002835 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002836}
2837
2838/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002839 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002840 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002841 *
Tejun Heo936fd732007-08-06 18:36:23 +09002842 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002843 *
2844 * LOCKING:
2845 * Inherited from caller.
2846 *
2847 * RETURNS:
2848 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002849 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002850 */
Tejun Heo936fd732007-08-06 18:36:23 +09002851int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002852{
2853 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002854 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002855
Tejun Heo936fd732007-08-06 18:36:23 +09002856 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002857 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002858
Tejun Heo936fd732007-08-06 18:36:23 +09002859 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002860 return 0;
2861
Tejun Heo936fd732007-08-06 18:36:23 +09002862 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002863 return rc;
2864
Tejun Heo1c3fae42006-04-02 20:53:28 +09002865 return 1;
2866}
2867
Alan Cox452503f2005-10-21 19:01:32 -04002868/*
2869 * This mode timing computation functionality is ported over from
2870 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2871 */
2872/*
Alan Coxb352e572006-08-10 18:52:12 +01002873 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002874 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002875 * for UDMA6, which is currently supported only by Maxtor drives.
2876 *
2877 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002878 */
2879
2880static const struct ata_timing ata_timing[] = {
David Daney3ada9c12009-01-15 17:45:31 -08002881/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2882 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2883 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2884 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2885 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2886 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2887 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2888 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002889
David Daney3ada9c12009-01-15 17:45:31 -08002890 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2891 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2892 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002893
David Daney3ada9c12009-01-15 17:45:31 -08002894 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2895 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2896 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2897 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2898 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002899
David Daney3ada9c12009-01-15 17:45:31 -08002900/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2901 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2902 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2903 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2904 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2905 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2906 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2907 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002908
2909 { 0xFF }
2910};
2911
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002912#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2913#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002914
2915static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2916{
David Daney3ada9c12009-01-15 17:45:31 -08002917 q->setup = EZ(t->setup * 1000, T);
2918 q->act8b = EZ(t->act8b * 1000, T);
2919 q->rec8b = EZ(t->rec8b * 1000, T);
2920 q->cyc8b = EZ(t->cyc8b * 1000, T);
2921 q->active = EZ(t->active * 1000, T);
2922 q->recover = EZ(t->recover * 1000, T);
2923 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2924 q->cycle = EZ(t->cycle * 1000, T);
2925 q->udma = EZ(t->udma * 1000, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002926}
2927
2928void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2929 struct ata_timing *m, unsigned int what)
2930{
2931 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2932 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2933 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2934 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2935 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2936 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
David Daney3ada9c12009-01-15 17:45:31 -08002937 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
Alan Cox452503f2005-10-21 19:01:32 -04002938 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2939 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2940}
2941
Tejun Heo63573572007-11-27 19:43:39 +09002942const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04002943{
Tejun Heo70cd0712007-11-27 19:43:40 +09002944 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04002945
Tejun Heo70cd0712007-11-27 19:43:40 +09002946 while (xfer_mode > t->mode)
2947 t++;
2948
2949 if (xfer_mode == t->mode)
2950 return t;
Borislav Petkovcd705d52012-10-21 18:57:56 +02002951
2952 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
2953 __func__, xfer_mode);
2954
Tejun Heo70cd0712007-11-27 19:43:40 +09002955 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04002956}
2957
2958int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2959 struct ata_timing *t, int T, int UT)
2960{
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002961 const u16 *id = adev->id;
Alan Cox452503f2005-10-21 19:01:32 -04002962 const struct ata_timing *s;
2963 struct ata_timing p;
2964
2965 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002966 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002967 */
Alan Cox452503f2005-10-21 19:01:32 -04002968
2969 if (!(s = ata_timing_find_mode(speed)))
2970 return -EINVAL;
2971
Albert Lee75b1f2f2005-11-16 17:06:18 +08002972 memcpy(t, s, sizeof(*s));
2973
Alan Cox452503f2005-10-21 19:01:32 -04002974 /*
2975 * If the drive is an EIDE drive, it can tell us it needs extended
2976 * PIO/MW_DMA cycle timing.
2977 */
2978
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002979 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
Alan Cox452503f2005-10-21 19:01:32 -04002980 memset(&p, 0, sizeof(p));
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002981
Bartlomiej Zolnierkiewiczbff00252011-10-13 15:17:32 +02002982 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
Bartlomiej Zolnierkiewicz9e8808a2010-01-18 18:13:57 +01002983 if (speed <= XFER_PIO_2)
2984 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2985 else if ((speed <= XFER_PIO_4) ||
2986 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2987 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2988 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2989 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2990
Alan Cox452503f2005-10-21 19:01:32 -04002991 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2992 }
2993
2994 /*
2995 * Convert the timing to bus clock counts.
2996 */
2997
Albert Lee75b1f2f2005-11-16 17:06:18 +08002998 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002999
3000 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003001 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3002 * S.M.A.R.T * and some other commands. We have to ensure that the
3003 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04003004 */
3005
Alanfd3367af2006-12-07 12:41:18 +00003006 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04003007 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3008 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3009 }
3010
3011 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003012 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04003013 */
3014
3015 if (t->act8b + t->rec8b < t->cyc8b) {
3016 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3017 t->rec8b = t->cyc8b - t->act8b;
3018 }
3019
3020 if (t->active + t->recover < t->cycle) {
3021 t->active += (t->cycle - (t->active + t->recover)) / 2;
3022 t->recover = t->cycle - t->active;
3023 }
Jeff Garzika617c092007-05-21 20:14:23 -04003024
Alan Cox4f701d12007-04-23 11:55:36 +01003025 /* In a few cases quantisation may produce enough errors to
3026 leave t->cycle too low for the sum of active and recovery
3027 if so we must correct this */
3028 if (t->active + t->recover > t->cycle)
3029 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04003030
3031 return 0;
3032}
3033
Tejun Heocf176e12006-04-02 17:54:46 +09003034/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09003035 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3036 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3037 * @cycle: cycle duration in ns
3038 *
3039 * Return matching xfer mode for @cycle. The returned mode is of
3040 * the transfer type specified by @xfer_shift. If @cycle is too
3041 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3042 * than the fastest known mode, the fasted mode is returned.
3043 *
3044 * LOCKING:
3045 * None.
3046 *
3047 * RETURNS:
3048 * Matching xfer_mode, 0xff if no match found.
3049 */
3050u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3051{
3052 u8 base_mode = 0xff, last_mode = 0xff;
3053 const struct ata_xfer_ent *ent;
3054 const struct ata_timing *t;
3055
3056 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3057 if (ent->shift == xfer_shift)
3058 base_mode = ent->base;
3059
3060 for (t = ata_timing_find_mode(base_mode);
3061 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3062 unsigned short this_cycle;
3063
3064 switch (xfer_shift) {
3065 case ATA_SHIFT_PIO:
3066 case ATA_SHIFT_MWDMA:
3067 this_cycle = t->cycle;
3068 break;
3069 case ATA_SHIFT_UDMA:
3070 this_cycle = t->udma;
3071 break;
3072 default:
3073 return 0xff;
3074 }
3075
3076 if (cycle > this_cycle)
3077 break;
3078
3079 last_mode = t->mode;
3080 }
3081
3082 return last_mode;
3083}
3084
3085/**
Tejun Heocf176e12006-04-02 17:54:46 +09003086 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003087 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003088 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003089 *
3090 * Adjust xfer masks of @dev downward. Note that this function
3091 * does not apply the change. Invoking ata_set_mode() afterwards
3092 * will apply the limit.
3093 *
3094 * LOCKING:
3095 * Inherited from caller.
3096 *
3097 * RETURNS:
3098 * 0 on success, negative errno on failure
3099 */
Tejun Heo458337d2007-02-02 16:22:30 +09003100int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003101{
Tejun Heo458337d2007-02-02 16:22:30 +09003102 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003103 unsigned long orig_mask, xfer_mask;
3104 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003105 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003106
Tejun Heo458337d2007-02-02 16:22:30 +09003107 quiet = !!(sel & ATA_DNXFER_QUIET);
3108 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003109
Tejun Heo458337d2007-02-02 16:22:30 +09003110 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3111 dev->mwdma_mask,
3112 dev->udma_mask);
3113 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003114
Tejun Heo458337d2007-02-02 16:22:30 +09003115 switch (sel) {
3116 case ATA_DNXFER_PIO:
3117 highbit = fls(pio_mask) - 1;
3118 pio_mask &= ~(1 << highbit);
3119 break;
3120
3121 case ATA_DNXFER_DMA:
3122 if (udma_mask) {
3123 highbit = fls(udma_mask) - 1;
3124 udma_mask &= ~(1 << highbit);
3125 if (!udma_mask)
3126 return -ENOENT;
3127 } else if (mwdma_mask) {
3128 highbit = fls(mwdma_mask) - 1;
3129 mwdma_mask &= ~(1 << highbit);
3130 if (!mwdma_mask)
3131 return -ENOENT;
3132 }
3133 break;
3134
3135 case ATA_DNXFER_40C:
3136 udma_mask &= ATA_UDMA_MASK_40C;
3137 break;
3138
3139 case ATA_DNXFER_FORCE_PIO0:
3140 pio_mask &= 1;
3141 case ATA_DNXFER_FORCE_PIO:
3142 mwdma_mask = 0;
3143 udma_mask = 0;
3144 break;
3145
Tejun Heo458337d2007-02-02 16:22:30 +09003146 default:
3147 BUG();
3148 }
3149
3150 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3151
3152 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3153 return -ENOENT;
3154
3155 if (!quiet) {
3156 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3157 snprintf(buf, sizeof(buf), "%s:%s",
3158 ata_mode_string(xfer_mask),
3159 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3160 else
3161 snprintf(buf, sizeof(buf), "%s",
3162 ata_mode_string(xfer_mask));
3163
Joe Perchesa9a79df2011-04-15 15:51:59 -07003164 ata_dev_warn(dev, "limiting speed to %s\n", buf);
Tejun Heo458337d2007-02-02 16:22:30 +09003165 }
Tejun Heocf176e12006-04-02 17:54:46 +09003166
3167 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3168 &dev->udma_mask);
3169
Tejun Heocf176e12006-04-02 17:54:46 +09003170 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003171}
3172
Tejun Heo3373efd2006-05-15 20:57:53 +09003173static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003174{
Tejun Heod0cb43b2009-07-09 09:27:50 +09003175 struct ata_port *ap = dev->link->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003176 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003177 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
Tejun Heo4055dee2008-02-07 10:34:08 +09003178 const char *dev_err_whine = "";
3179 int ign_dev_err = 0;
Tejun Heod0cb43b2009-07-09 09:27:50 +09003180 unsigned int err_mask = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003181 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182
Tejun Heoe8384602006-04-02 18:51:53 +09003183 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003184 if (dev->xfer_shift == ATA_SHIFT_PIO)
3185 dev->flags |= ATA_DFLAG_PIO;
3186
Tejun Heod0cb43b2009-07-09 09:27:50 +09003187 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3188 dev_err_whine = " (SET_XFERMODE skipped)";
3189 else {
3190 if (nosetxfer)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003191 ata_dev_warn(dev,
3192 "NOSETXFER but PATA detected - can't "
3193 "skip SETXFER, might malfunction\n");
Tejun Heod0cb43b2009-07-09 09:27:50 +09003194 err_mask = ata_dev_set_xfermode(dev);
3195 }
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003196
Tejun Heo4055dee2008-02-07 10:34:08 +09003197 if (err_mask & ~AC_ERR_DEV)
3198 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003199
Tejun Heo4055dee2008-02-07 10:34:08 +09003200 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003201 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003202 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003203 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003204 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003205 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003206
Alan Coxb93fda12008-04-08 16:36:44 +01003207 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3208 /* Old CFA may refuse this command, which is just fine */
3209 if (ata_id_is_cfa(dev->id))
3210 ign_dev_err = 1;
3211 /* Catch several broken garbage emulations plus some pre
3212 ATA devices */
3213 if (ata_id_major_version(dev->id) == 0 &&
3214 dev->pio_mode <= XFER_PIO_2)
3215 ign_dev_err = 1;
3216 /* Some very old devices and some bad newer ones fail
3217 any kind of SET_XFERMODE request but support PIO0-2
3218 timings and no IORDY */
3219 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3220 ign_dev_err = 1;
3221 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003222 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3223 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3224 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3225 dev->dma_mode == XFER_MW_DMA_0 &&
3226 (dev->id[63] >> 8) & 1)
3227 ign_dev_err = 1;
3228
3229 /* if the device is actually configured correctly, ignore dev err */
3230 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3231 ign_dev_err = 1;
3232
3233 if (err_mask & AC_ERR_DEV) {
3234 if (!ign_dev_err)
3235 goto fail;
3236 else
3237 dev_err_whine = " (device error ignored)";
3238 }
3239
Tejun Heo23e71c32006-03-06 04:31:57 +09003240 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3241 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242
Joe Perchesa9a79df2011-04-15 15:51:59 -07003243 ata_dev_info(dev, "configured for %s%s\n",
3244 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3245 dev_err_whine);
Tejun Heo4055dee2008-02-07 10:34:08 +09003246
Tejun Heo83206a22006-03-24 15:25:31 +09003247 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003248
3249 fail:
Joe Perchesa9a79df2011-04-15 15:51:59 -07003250 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
Tejun Heo4055dee2008-02-07 10:34:08 +09003251 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003252}
3253
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254/**
Alan04351822007-03-06 02:37:52 -08003255 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003256 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003257 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258 *
Alan04351822007-03-06 02:37:52 -08003259 * Standard implementation of the function used to tune and set
3260 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3261 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003262 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003263 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003265 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003266 *
3267 * RETURNS:
3268 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003269 */
Alan04351822007-03-06 02:37:52 -08003270
Tejun Heo02607312007-08-06 18:36:23 +09003271int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003272{
Tejun Heo02607312007-08-06 18:36:23 +09003273 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003274 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003275 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003276
Tejun Heoa6d5a512006-03-06 04:31:57 +09003277 /* step 1: calculate xfer_mask */
Tejun Heo1eca4362008-11-03 20:03:17 +09003278 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003279 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003280 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003281
Alan Coxb3a70602007-10-02 12:38:26 -04003282 mode_mask = ATA_DMA_MASK_ATA;
3283 if (dev->class == ATA_DEV_ATAPI)
3284 mode_mask = ATA_DMA_MASK_ATAPI;
3285 else if (ata_id_is_cfa(dev->id))
3286 mode_mask = ATA_DMA_MASK_CFA;
3287
Tejun Heo3373efd2006-05-15 20:57:53 +09003288 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003289 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003290
Tejun Heoacf356b2006-03-24 14:07:50 +09003291 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
Alan Coxb3a70602007-10-02 12:38:26 -04003292
3293 if (libata_dma_mask & mode_mask)
Sergei Shtylyov80a9c432011-12-22 22:41:32 +03003294 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3295 dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003296 else
3297 dma_mask = 0;
3298
Tejun Heoacf356b2006-03-24 14:07:50 +09003299 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3300 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003301
Tejun Heo4f659772006-04-01 01:38:18 +09003302 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003303 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003304 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003305 }
Tejun Heo4f659772006-04-01 01:38:18 +09003306 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003307 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003308
3309 /* step 2: always set host PIO timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003310 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo70cd0712007-11-27 19:43:40 +09003311 if (dev->pio_mode == 0xff) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003312 ata_dev_warn(dev, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003313 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003314 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003315 }
3316
3317 dev->xfer_mode = dev->pio_mode;
3318 dev->xfer_shift = ATA_SHIFT_PIO;
3319 if (ap->ops->set_piomode)
3320 ap->ops->set_piomode(ap, dev);
3321 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003322
Tejun Heoa6d5a512006-03-06 04:31:57 +09003323 /* step 3: set host DMA timings */
Tejun Heo1eca4362008-11-03 20:03:17 +09003324 ata_for_each_dev(dev, link, ENABLED) {
3325 if (!ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003326 continue;
3327
3328 dev->xfer_mode = dev->dma_mode;
3329 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3330 if (ap->ops->set_dmamode)
3331 ap->ops->set_dmamode(ap, dev);
3332 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003333
3334 /* step 4: update devices' xfer mode */
Tejun Heo1eca4362008-11-03 20:03:17 +09003335 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo3373efd2006-05-15 20:57:53 +09003336 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003337 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003338 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003339 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003340
Tejun Heoe8e06192006-04-01 01:38:18 +09003341 /* Record simplex status. If we selected DMA then the other
3342 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003343 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003344 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003345 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003346
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003347 out:
3348 if (rc)
3349 *r_failed_dev = dev;
3350 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003351}
3352
3353/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003354 * ata_wait_ready - wait for link to become ready
3355 * @link: link to be waited on
3356 * @deadline: deadline jiffies for the operation
3357 * @check_ready: callback to check link readiness
3358 *
3359 * Wait for @link to become ready. @check_ready should return
3360 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3361 * link doesn't seem to be occupied, other errno for other error
3362 * conditions.
3363 *
3364 * Transient -ENODEV conditions are allowed for
3365 * ATA_TMOUT_FF_WAIT.
3366 *
3367 * LOCKING:
3368 * EH context.
3369 *
3370 * RETURNS:
3371 * 0 if @linke is ready before @deadline; otherwise, -errno.
3372 */
3373int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3374 int (*check_ready)(struct ata_link *link))
3375{
3376 unsigned long start = jiffies;
Tejun Heob48d58f2010-04-09 19:46:38 +09003377 unsigned long nodev_deadline;
Tejun Heoaa2731a2008-04-07 22:47:19 +09003378 int warned = 0;
3379
Tejun Heob48d58f2010-04-09 19:46:38 +09003380 /* choose which 0xff timeout to use, read comment in libata.h */
3381 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3382 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3383 else
3384 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3385
Tejun Heob1c72912008-07-31 17:02:43 +09003386 /* Slave readiness can't be tested separately from master. On
3387 * M/S emulation configuration, this function should be called
3388 * only on the master and it will handle both master and slave.
3389 */
3390 WARN_ON(link == link->ap->slave_link);
3391
Tejun Heoaa2731a2008-04-07 22:47:19 +09003392 if (time_after(nodev_deadline, deadline))
3393 nodev_deadline = deadline;
3394
3395 while (1) {
3396 unsigned long now = jiffies;
3397 int ready, tmp;
3398
3399 ready = tmp = check_ready(link);
3400 if (ready > 0)
3401 return 0;
3402
Tejun Heob48d58f2010-04-09 19:46:38 +09003403 /*
3404 * -ENODEV could be transient. Ignore -ENODEV if link
Tejun Heoaa2731a2008-04-07 22:47:19 +09003405 * is online. Also, some SATA devices take a long
Tejun Heob48d58f2010-04-09 19:46:38 +09003406 * time to clear 0xff after reset. Wait for
3407 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3408 * offline.
Tejun Heoaa2731a2008-04-07 22:47:19 +09003409 *
3410 * Note that some PATA controllers (pata_ali) explode
3411 * if status register is read more than once when
3412 * there's no device attached.
3413 */
3414 if (ready == -ENODEV) {
3415 if (ata_link_online(link))
3416 ready = 0;
3417 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3418 !ata_link_offline(link) &&
3419 time_before(now, nodev_deadline))
3420 ready = 0;
3421 }
3422
3423 if (ready)
3424 return ready;
3425 if (time_after(now, deadline))
3426 return -EBUSY;
3427
3428 if (!warned && time_after(now, start + 5 * HZ) &&
3429 (deadline - now > 3 * HZ)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003430 ata_link_warn(link,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003431 "link is slow to respond, please be patient "
3432 "(ready=%d)\n", tmp);
3433 warned = 1;
3434 }
3435
Tejun Heo97750ce2010-09-06 17:56:29 +02003436 ata_msleep(link->ap, 50);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003437 }
3438}
3439
3440/**
3441 * ata_wait_after_reset - wait for link to become ready after reset
3442 * @link: link to be waited on
3443 * @deadline: deadline jiffies for the operation
3444 * @check_ready: callback to check link readiness
3445 *
3446 * Wait for @link to become ready after reset.
3447 *
3448 * LOCKING:
3449 * EH context.
3450 *
3451 * RETURNS:
3452 * 0 if @linke is ready before @deadline; otherwise, -errno.
3453 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003454int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003455 int (*check_ready)(struct ata_link *link))
3456{
Tejun Heo97750ce2010-09-06 17:56:29 +02003457 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003458
3459 return ata_wait_ready(link, deadline, check_ready);
3460}
3461
3462/**
Tejun Heo936fd732007-08-06 18:36:23 +09003463 * sata_link_debounce - debounce SATA phy status
3464 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003465 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003466 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003467 *
Tejun Heo1152b262010-09-01 17:50:05 +02003468 * Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003469 * holding the same value where DET is not 1 for @duration polled
3470 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003471 * beginning of the stable state. Because DET gets stuck at 1 on
3472 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003473 * until timeout then returns 0 if DET is stable at 1.
3474 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003475 * @timeout is further limited by @deadline. The sooner of the
3476 * two is used.
3477 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003478 * LOCKING:
3479 * Kernel thread context (may sleep)
3480 *
3481 * RETURNS:
3482 * 0 on success, -errno on failure.
3483 */
Tejun Heo936fd732007-08-06 18:36:23 +09003484int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3485 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003486{
Tejun Heo341c2c92008-05-20 02:17:51 +09003487 unsigned long interval = params[0];
3488 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003489 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003490 u32 last, cur;
3491 int rc;
3492
Tejun Heo341c2c92008-05-20 02:17:51 +09003493 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003494 if (time_before(t, deadline))
3495 deadline = t;
3496
Tejun Heo936fd732007-08-06 18:36:23 +09003497 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003498 return rc;
3499 cur &= 0xf;
3500
3501 last = cur;
3502 last_jiffies = jiffies;
3503
3504 while (1) {
Tejun Heo97750ce2010-09-06 17:56:29 +02003505 ata_msleep(link->ap, interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003506 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003507 return rc;
3508 cur &= 0xf;
3509
3510 /* DET stable? */
3511 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003512 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003513 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003514 if (time_after(jiffies,
3515 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003516 return 0;
3517 continue;
3518 }
3519
3520 /* unstable, start over */
3521 last = cur;
3522 last_jiffies = jiffies;
3523
Tejun Heof1545152007-07-16 14:29:40 +09003524 /* Check deadline. If debouncing failed, return
3525 * -EPIPE to tell upper layer to lower link speed.
3526 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003527 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003528 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003529 }
3530}
3531
3532/**
Tejun Heo936fd732007-08-06 18:36:23 +09003533 * sata_link_resume - resume SATA link
3534 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003535 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003536 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003537 *
Tejun Heo936fd732007-08-06 18:36:23 +09003538 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003539 *
3540 * LOCKING:
3541 * Kernel thread context (may sleep)
3542 *
3543 * RETURNS:
3544 * 0 on success, -errno on failure.
3545 */
Tejun Heo936fd732007-08-06 18:36:23 +09003546int sata_link_resume(struct ata_link *link, const unsigned long *params,
3547 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003548{
Tejun Heo5040ab62010-01-11 11:14:44 +09003549 int tries = ATA_LINK_RESUME_TRIES;
Tejun Heoac371982008-04-07 22:47:19 +09003550 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003551 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003552
Tejun Heo936fd732007-08-06 18:36:23 +09003553 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003554 return rc;
3555
Tejun Heo5040ab62010-01-11 11:14:44 +09003556 /*
3557 * Writes to SControl sometimes get ignored under certain
3558 * controllers (ata_piix SIDPR). Make sure DET actually is
3559 * cleared.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003560 */
Tejun Heo5040ab62010-01-11 11:14:44 +09003561 do {
3562 scontrol = (scontrol & 0x0f0) | 0x300;
3563 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3564 return rc;
3565 /*
3566 * Some PHYs react badly if SStatus is pounded
3567 * immediately after resuming. Delay 200ms before
3568 * debouncing.
3569 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003570 ata_msleep(link->ap, 200);
Tejun Heo5040ab62010-01-11 11:14:44 +09003571
3572 /* is SControl restored correctly? */
3573 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3574 return rc;
3575 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3576
3577 if ((scontrol & 0xf0f) != 0x300) {
Tejun Heo38941c92011-07-01 15:12:09 +02003578 ata_link_warn(link, "failed to resume link (SControl %X)\n",
Joe Perchesa9a79df2011-04-15 15:51:59 -07003579 scontrol);
Tejun Heo5040ab62010-01-11 11:14:44 +09003580 return 0;
3581 }
3582
3583 if (tries < ATA_LINK_RESUME_TRIES)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003584 ata_link_warn(link, "link resume succeeded after %d retries\n",
3585 ATA_LINK_RESUME_TRIES - tries);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003586
Tejun Heoac371982008-04-07 22:47:19 +09003587 if ((rc = sata_link_debounce(link, params, deadline)))
3588 return rc;
3589
Tejun Heof0465192008-05-19 01:15:08 +09003590 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003591 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3592 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003593
Tejun Heof0465192008-05-19 01:15:08 +09003594 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003595}
3596
Tejun Heof5914a42006-05-31 18:27:48 +09003597/**
Tejun Heo1152b262010-09-01 17:50:05 +02003598 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3599 * @link: ATA link to manipulate SControl for
3600 * @policy: LPM policy to configure
3601 * @spm_wakeup: initiate LPM transition to active state
3602 *
3603 * Manipulate the IPM field of the SControl register of @link
3604 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3605 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3606 * the link. This function also clears PHYRDY_CHG before
3607 * returning.
3608 *
3609 * LOCKING:
3610 * EH context.
3611 *
3612 * RETURNS:
3613 * 0 on succes, -errno otherwise.
3614 */
3615int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3616 bool spm_wakeup)
3617{
3618 struct ata_eh_context *ehc = &link->eh_context;
3619 bool woken_up = false;
3620 u32 scontrol;
3621 int rc;
3622
3623 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3624 if (rc)
3625 return rc;
3626
3627 switch (policy) {
3628 case ATA_LPM_MAX_POWER:
3629 /* disable all LPM transitions */
Shane Huang65fe1f02012-09-07 22:40:01 +08003630 scontrol |= (0x7 << 8);
Tejun Heo1152b262010-09-01 17:50:05 +02003631 /* initiate transition to active state */
3632 if (spm_wakeup) {
3633 scontrol |= (0x4 << 12);
3634 woken_up = true;
3635 }
3636 break;
3637 case ATA_LPM_MED_POWER:
3638 /* allow LPM to PARTIAL */
3639 scontrol &= ~(0x1 << 8);
Shane Huang65fe1f02012-09-07 22:40:01 +08003640 scontrol |= (0x6 << 8);
Tejun Heo1152b262010-09-01 17:50:05 +02003641 break;
3642 case ATA_LPM_MIN_POWER:
Kristen Carlson Accardi8a745f12011-03-04 10:24:11 -08003643 if (ata_link_nr_enabled(link) > 0)
3644 /* no restrictions on LPM transitions */
Shane Huang65fe1f02012-09-07 22:40:01 +08003645 scontrol &= ~(0x7 << 8);
Kristen Carlson Accardi8a745f12011-03-04 10:24:11 -08003646 else {
3647 /* empty port, power off */
3648 scontrol &= ~0xf;
3649 scontrol |= (0x1 << 2);
3650 }
Tejun Heo1152b262010-09-01 17:50:05 +02003651 break;
3652 default:
3653 WARN_ON(1);
3654 }
3655
3656 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3657 if (rc)
3658 return rc;
3659
3660 /* give the link time to transit out of LPM state */
3661 if (woken_up)
3662 msleep(10);
3663
3664 /* clear PHYRDY_CHG from SError */
3665 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3666 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3667}
3668
3669/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003670 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003671 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003672 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003673 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003674 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003675 * prereset makes libata abort whole reset sequence and give up
3676 * that port, so prereset should be best-effort. It does its
3677 * best to prepare for reset sequence but if things go wrong, it
3678 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003679 *
3680 * LOCKING:
3681 * Kernel thread context (may sleep)
3682 *
3683 * RETURNS:
3684 * 0 on success, -errno otherwise.
3685 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003686int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003687{
Tejun Heocc0680a2007-08-06 18:36:23 +09003688 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003689 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003690 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003691 int rc;
3692
Tejun Heof5914a42006-05-31 18:27:48 +09003693 /* if we're about to do hardreset, nothing more to do */
3694 if (ehc->i.action & ATA_EH_HARDRESET)
3695 return 0;
3696
Tejun Heo936fd732007-08-06 18:36:23 +09003697 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003698 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003699 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003700 /* whine about phy resume failure but proceed */
3701 if (rc && rc != -EOPNOTSUPP)
Joe Perchesa9a79df2011-04-15 15:51:59 -07003702 ata_link_warn(link,
3703 "failed to resume link for reset (errno=%d)\n",
3704 rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003705 }
3706
Tejun Heo45db2f62008-04-08 01:46:56 +09003707 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003708 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003709 ehc->i.action &= ~ATA_EH_SOFTRESET;
3710
Tejun Heof5914a42006-05-31 18:27:48 +09003711 return 0;
3712}
3713
Tejun Heoc2bd5802006-01-24 17:05:22 +09003714/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003715 * sata_link_hardreset - reset link via SATA phy reset
3716 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003717 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003718 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003719 * @online: optional out parameter indicating link onlineness
3720 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003721 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003722 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003723 * After hardreset, link readiness is waited upon using
3724 * ata_wait_ready() if @check_ready is specified. LLDs are
3725 * allowed to not specify @check_ready and wait itself after this
3726 * function returns. Device classification is LLD's
3727 * responsibility.
3728 *
3729 * *@online is set to one iff reset succeeded and @link is online
3730 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003731 *
3732 * LOCKING:
3733 * Kernel thread context (may sleep)
3734 *
3735 * RETURNS:
3736 * 0 on success, -errno otherwise.
3737 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003738int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003739 unsigned long deadline,
3740 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003741{
Tejun Heo852ee162006-04-01 01:38:18 +09003742 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003743 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003744
Tejun Heoc2bd5802006-01-24 17:05:22 +09003745 DPRINTK("ENTER\n");
3746
Tejun Heo9dadd452008-04-07 22:47:19 +09003747 if (online)
3748 *online = false;
3749
Tejun Heo936fd732007-08-06 18:36:23 +09003750 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003751 /* SATA spec says nothing about how to reconfigure
3752 * spd. To be on the safe side, turn off phy during
3753 * reconfiguration. This works for at least ICH7 AHCI
3754 * and Sil3124.
3755 */
Tejun Heo936fd732007-08-06 18:36:23 +09003756 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003757 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003758
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003759 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003760
Tejun Heo936fd732007-08-06 18:36:23 +09003761 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003762 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003763
Tejun Heo936fd732007-08-06 18:36:23 +09003764 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003765 }
3766
3767 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003768 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003769 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003770
Tejun Heo852ee162006-04-01 01:38:18 +09003771 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003772
Tejun Heo936fd732007-08-06 18:36:23 +09003773 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003774 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003775
Tejun Heo1c3fae42006-04-02 20:53:28 +09003776 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003777 * 10.4.2 says at least 1 ms.
3778 */
Tejun Heo97750ce2010-09-06 17:56:29 +02003779 ata_msleep(link->ap, 1);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003780
Tejun Heo936fd732007-08-06 18:36:23 +09003781 /* bring link back */
3782 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003783 if (rc)
3784 goto out;
3785 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003786 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003787 goto out;
3788
3789 /* Link is online. From this point, -ENODEV too is an error. */
3790 if (online)
3791 *online = true;
3792
Tejun Heo071f44b2008-04-07 22:47:22 +09003793 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003794 /* If PMP is supported, we have to do follow-up SRST.
3795 * Some PMPs don't send D2H Reg FIS after hardreset if
3796 * the first port is empty. Wait only for
3797 * ATA_TMOUT_PMP_SRST_WAIT.
3798 */
3799 if (check_ready) {
3800 unsigned long pmp_deadline;
3801
Tejun Heo341c2c92008-05-20 02:17:51 +09003802 pmp_deadline = ata_deadline(jiffies,
3803 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003804 if (time_after(pmp_deadline, deadline))
3805 pmp_deadline = deadline;
3806 ata_wait_ready(link, pmp_deadline, check_ready);
3807 }
3808 rc = -EAGAIN;
3809 goto out;
3810 }
3811
3812 rc = 0;
3813 if (check_ready)
3814 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003815 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003816 if (rc && rc != -EAGAIN) {
3817 /* online is set iff link is online && reset succeeded */
3818 if (online)
3819 *online = false;
Joe Perchesa9a79df2011-04-15 15:51:59 -07003820 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003821 }
Tejun Heob6103f62006-11-01 17:59:53 +09003822 DPRINTK("EXIT, rc=%d\n", rc);
3823 return rc;
3824}
3825
3826/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003827 * sata_std_hardreset - COMRESET w/o waiting or classification
3828 * @link: link to reset
3829 * @class: resulting class of attached device
3830 * @deadline: deadline jiffies for the operation
3831 *
3832 * Standard SATA COMRESET w/o waiting or classification.
3833 *
3834 * LOCKING:
3835 * Kernel thread context (may sleep)
3836 *
3837 * RETURNS:
3838 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3839 */
3840int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3841 unsigned long deadline)
3842{
3843 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3844 bool online;
3845 int rc;
3846
3847 /* do hardreset */
3848 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003849 return online ? -EAGAIN : rc;
3850}
3851
3852/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003853 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003854 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003855 * @classes: classes of attached devices
3856 *
3857 * This function is invoked after a successful reset. Note that
3858 * the device might have been reset more than once using
3859 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003860 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003861 * LOCKING:
3862 * Kernel thread context (may sleep)
3863 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003864void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003865{
Tejun Heof0465192008-05-19 01:15:08 +09003866 u32 serror;
3867
Tejun Heoc2bd5802006-01-24 17:05:22 +09003868 DPRINTK("ENTER\n");
3869
Tejun Heof0465192008-05-19 01:15:08 +09003870 /* reset complete, clear SError */
3871 if (!sata_scr_read(link, SCR_ERROR, &serror))
3872 sata_scr_write(link, SCR_ERROR, serror);
3873
Tejun Heoc2bd5802006-01-24 17:05:22 +09003874 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003875 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003876
Tejun Heoc2bd5802006-01-24 17:05:22 +09003877 DPRINTK("EXIT\n");
3878}
3879
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003880/**
Tejun Heo623a3122006-03-05 17:55:58 +09003881 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003882 * @dev: device to compare against
3883 * @new_class: class of the new device
3884 * @new_id: IDENTIFY page of the new device
3885 *
3886 * Compare @new_class and @new_id against @dev and determine
3887 * whether @dev is the device indicated by @new_class and
3888 * @new_id.
3889 *
3890 * LOCKING:
3891 * None.
3892 *
3893 * RETURNS:
3894 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3895 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003896static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3897 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003898{
3899 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003900 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3901 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003902
3903 if (dev->class != new_class) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003904 ata_dev_info(dev, "class mismatch %d != %d\n",
3905 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003906 return 0;
3907 }
3908
Tejun Heoa0cf7332007-01-02 20:18:49 +09003909 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3910 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3911 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3912 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003913
3914 if (strcmp(model[0], model[1])) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003915 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3916 model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003917 return 0;
3918 }
3919
3920 if (strcmp(serial[0], serial[1])) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003921 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3922 serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003923 return 0;
3924 }
3925
Tejun Heo623a3122006-03-05 17:55:58 +09003926 return 1;
3927}
3928
3929/**
Tejun Heofe309112007-05-15 03:28:15 +09003930 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003931 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003932 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003933 *
3934 * Re-read IDENTIFY page and make sure @dev is still attached to
3935 * the port.
3936 *
3937 * LOCKING:
3938 * Kernel thread context (may sleep)
3939 *
3940 * RETURNS:
3941 * 0 on success, negative errno otherwise
3942 */
Tejun Heofe309112007-05-15 03:28:15 +09003943int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003944{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003945 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003946 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003947 int rc;
3948
Tejun Heofe635c72006-05-15 20:57:35 +09003949 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003950 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003951 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003952 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003953
3954 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003955 if (!ata_dev_same_device(dev, class, id))
3956 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003957
Tejun Heofe635c72006-05-15 20:57:35 +09003958 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003959 return 0;
3960}
3961
3962/**
3963 * ata_dev_revalidate - Revalidate ATA device
3964 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09003965 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09003966 * @readid_flags: read ID flags
3967 *
3968 * Re-read IDENTIFY page, make sure @dev is still attached to the
3969 * port and reconfigure it according to the new IDENTIFY page.
3970 *
3971 * LOCKING:
3972 * Kernel thread context (may sleep)
3973 *
3974 * RETURNS:
3975 * 0 on success, negative errno otherwise
3976 */
Tejun Heo422c9da2007-09-23 13:14:12 +09003977int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3978 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09003979{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003980 u64 n_sectors = dev->n_sectors;
Tejun Heo5920dad2009-07-15 17:11:41 +09003981 u64 n_native_sectors = dev->n_native_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003982 int rc;
3983
3984 if (!ata_dev_enabled(dev))
3985 return -ENODEV;
3986
Tejun Heo422c9da2007-09-23 13:14:12 +09003987 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3988 if (ata_class_enabled(new_class) &&
Borislav Petkovf0d06132009-04-26 16:33:34 +02003989 new_class != ATA_DEV_ATA &&
3990 new_class != ATA_DEV_ATAPI &&
3991 new_class != ATA_DEV_SEMB) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07003992 ata_dev_info(dev, "class mismatch %u != %u\n",
3993 dev->class, new_class);
Tejun Heo422c9da2007-09-23 13:14:12 +09003994 rc = -ENODEV;
3995 goto fail;
3996 }
3997
Tejun Heofe309112007-05-15 03:28:15 +09003998 /* re-read ID */
3999 rc = ata_dev_reread_id(dev, readid_flags);
4000 if (rc)
4001 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09004002
4003 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09004004 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004005 if (rc)
4006 goto fail;
4007
4008 /* verify n_sectors hasn't changed */
Tejun Heo445d2112010-04-05 10:33:13 +09004009 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4010 dev->n_sectors == n_sectors)
4011 return 0;
4012
4013 /* n_sectors has changed */
Joe Perchesa9a79df2011-04-15 15:51:59 -07004014 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4015 (unsigned long long)n_sectors,
4016 (unsigned long long)dev->n_sectors);
Tejun Heo445d2112010-04-05 10:33:13 +09004017
4018 /*
4019 * Something could have caused HPA to be unlocked
4020 * involuntarily. If n_native_sectors hasn't changed and the
4021 * new size matches it, keep the device.
4022 */
4023 if (dev->n_native_sectors == n_native_sectors &&
4024 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004025 ata_dev_warn(dev,
4026 "new n_sectors matches native, probably "
4027 "late HPA unlock, n_sectors updated\n");
Tejun Heo68939ce2010-05-15 20:09:33 +02004028 /* use the larger n_sectors */
Tejun Heo445d2112010-04-05 10:33:13 +09004029 return 0;
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004030 }
4031
Tejun Heo445d2112010-04-05 10:33:13 +09004032 /*
4033 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4034 * unlocking HPA in those cases.
4035 *
4036 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4037 */
4038 if (dev->n_native_sectors == n_native_sectors &&
4039 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4040 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004041 ata_dev_warn(dev,
4042 "old n_sectors matches native, probably "
4043 "late HPA lock, will try to unlock HPA\n");
Tejun Heo445d2112010-04-05 10:33:13 +09004044 /* try unlocking HPA */
4045 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4046 rc = -EIO;
4047 } else
4048 rc = -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09004049
Tejun Heo445d2112010-04-05 10:33:13 +09004050 /* restore original n_[native_]sectors and fail */
4051 dev->n_native_sectors = n_native_sectors;
4052 dev->n_sectors = n_sectors;
Tejun Heo623a3122006-03-05 17:55:58 +09004053 fail:
Joe Perchesa9a79df2011-04-15 15:51:59 -07004054 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09004055 return rc;
4056}
4057
Alan Cox6919a0a2006-10-27 19:08:46 -07004058struct ata_blacklist_entry {
4059 const char *model_num;
4060 const char *model_rev;
4061 unsigned long horkage;
4062};
4063
4064static const struct ata_blacklist_entry ata_device_blacklist [] = {
4065 /* Devices with DMA related problems under Linux */
4066 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4067 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4068 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4069 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4070 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4071 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4072 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4073 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4074 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004075 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004076 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4077 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4078 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4079 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4080 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
Mark Lord7da4c932010-07-01 18:18:12 -04004081 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004082 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4083 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4084 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4085 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4086 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4087 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4088 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4089 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004090 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4091 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004092 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004093 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Prarit Bhargavad17d794c2012-08-23 15:11:52 -04004094 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004095 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004096 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004097
Albert Lee18d6e9d2007-04-02 11:34:15 +08004098 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004099 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004100 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004101
Alan Cox6919a0a2006-10-27 19:08:46 -07004102 /* Devices we expect to fail diagnostics */
4103
4104 /* Devices where NCQ should be avoided */
4105 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004106 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004107 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004108 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4109 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004110 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004111 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004112 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004113 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004114 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Lubomir Bulej5ccfca92008-12-22 11:35:22 +01004115 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004116
Tejun Heoac70a962008-11-27 13:36:48 +09004117 /* Seagate NCQ + FLUSH CACHE firmware bug */
Mark Lord4d1f9082010-07-05 18:53:37 -04004118 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004119 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004120
Mark Lord4d1f9082010-07-05 18:53:37 -04004121 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004122 ATA_HORKAGE_FIRMWARE_WARN },
4123
Mark Lord4d1f9082010-07-05 18:53:37 -04004124 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heod10d4912008-12-11 13:42:42 +09004125 ATA_HORKAGE_FIRMWARE_WARN },
4126
Mark Lord4d1f9082010-07-05 18:53:37 -04004127 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004128 ATA_HORKAGE_FIRMWARE_WARN },
4129
Robert Hancock36e337d2007-04-02 22:05:29 -06004130 /* Blacklist entries taken from Silicon Image 3124/3132
4131 Windows driver .inf file - also several Linux problem reports */
4132 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4133 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4134 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004135
Tejun Heo68b0ddb2010-04-05 10:51:26 +09004136 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4137 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4138
Tejun Heo16c55b02007-08-29 11:58:33 +09004139 /* devices which puke on READ_NATIVE_MAX */
4140 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4141 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4142 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4143 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004144
Tejun Heo78313872009-08-07 01:59:15 +09004145 /* this one allows HPA unlocking but fails IOs on the area */
4146 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4147
Alan Cox93328e12007-09-29 04:06:48 -04004148 /* Devices which report 1 sector over size HPA */
4149 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4150 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004151 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004152
Alan Cox6bbfd532007-11-05 22:58:58 +00004153 /* Devices which get the IVB wrong */
4154 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004155 /* Maybe we should just blacklist TSSTcorp... */
Mark Lord7da4c932010-07-01 18:18:12 -04004156 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004157
Jens Axboe9ce8e302008-08-27 15:23:18 +02004158 /* Devices that do not need bridging limits applied */
4159 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
Jeff Garzik04d0f1b82012-08-17 13:36:59 -04004160 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
Jens Axboe9ce8e302008-08-27 15:23:18 +02004161
Tejun Heo90627122009-01-29 20:31:36 +09004162 /* Devices which aren't very happy with higher link speeds */
4163 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
Daniel J Bluemanc5310772012-07-23 12:22:37 +08004164 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
Tejun Heo90627122009-01-29 20:31:36 +09004165
Tejun Heod0cb43b2009-07-09 09:27:50 +09004166 /*
4167 * Devices which choke on SETXFER. Applies only if both the
4168 * device and controller are SATA.
4169 */
Tejun Heocd691872011-06-22 12:13:10 +02004170 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
Vladimir LAVALLADE3a251792012-01-08 13:50:13 +01004171 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4172 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
Tejun Heocd691872011-06-22 12:13:10 +02004173 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4174 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
Tejun Heod0cb43b2009-07-09 09:27:50 +09004175
Alan Cox6919a0a2006-10-27 19:08:46 -07004176 /* End Marker */
4177 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004178};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004179
Mark Lordbce036c2010-07-01 18:16:14 -04004180/**
4181 * glob_match - match a text string against a glob-style pattern
4182 * @text: the string to be examined
4183 * @pattern: the glob-style pattern to be matched against
4184 *
4185 * Either/both of text and pattern can be empty strings.
4186 *
4187 * Match text against a glob-style pattern, with wildcards and simple sets:
4188 *
4189 * ? matches any single character.
4190 * * matches any run of characters.
4191 * [xyz] matches a single character from the set: x, y, or z.
Mark Lord2f9e4d12010-07-05 10:25:45 -04004192 * [a-d] matches a single character from the range: a, b, c, or d.
4193 * [a-d0-9] matches a single character from either range.
Mark Lordbce036c2010-07-01 18:16:14 -04004194 *
Mark Lord2f9e4d12010-07-05 10:25:45 -04004195 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4196 * Behaviour with malformed patterns is undefined, though generally reasonable.
Mark Lordbce036c2010-07-01 18:16:14 -04004197 *
Randy Dunlap3d2be542010-08-09 16:28:30 -07004198 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
Mark Lordbce036c2010-07-01 18:16:14 -04004199 *
4200 * This function uses one level of recursion per '*' in pattern.
4201 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4202 * this will not cause stack problems for any reasonable use here.
4203 *
4204 * RETURNS:
4205 * 0 on match, 1 otherwise.
4206 */
4207static int glob_match (const char *text, const char *pattern)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004208{
Mark Lordbce036c2010-07-01 18:16:14 -04004209 do {
4210 /* Match single character or a '?' wildcard */
4211 if (*text == *pattern || *pattern == '?') {
4212 if (!*pattern++)
4213 return 0; /* End of both strings: match */
4214 } else {
4215 /* Match single char against a '[' bracketed ']' pattern set */
4216 if (!*text || *pattern != '[')
4217 break; /* Not a pattern set */
Mark Lord2f9e4d12010-07-05 10:25:45 -04004218 while (*++pattern && *pattern != ']' && *text != *pattern) {
4219 if (*pattern == '-' && *(pattern - 1) != '[')
4220 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4221 ++pattern;
4222 break;
4223 }
4224 }
Mark Lordbce036c2010-07-01 18:16:14 -04004225 if (!*pattern || *pattern == ']')
4226 return 1; /* No match */
4227 while (*pattern && *pattern++ != ']');
4228 }
4229 } while (*++text && *pattern);
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004230
Mark Lordbce036c2010-07-01 18:16:14 -04004231 /* Match any run of chars against a '*' wildcard */
4232 if (*pattern == '*') {
4233 if (!*++pattern)
4234 return 0; /* Match: avoid recursion at end of pattern */
4235 /* Loop to handle additional pattern chars after the wildcard */
4236 while (*text) {
4237 if (glob_match(text, pattern) == 0)
4238 return 0; /* Remainder matched */
4239 ++text; /* Absorb (match) this char and try again */
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004240 }
4241 }
Mark Lordbce036c2010-07-01 18:16:14 -04004242 if (!*text && !*pattern)
4243 return 0; /* End of both strings: match */
4244 return 1; /* No match */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004245}
Jeff Garzik4fca3772011-02-15 01:13:24 -05004246
Tejun Heo75683fe2007-07-05 13:31:27 +09004247static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004248{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004249 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4250 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004251 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004252
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004253 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4254 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004255
Alan Cox6919a0a2006-10-27 19:08:46 -07004256 while (ad->model_num) {
Mark Lordbce036c2010-07-01 18:16:14 -04004257 if (!glob_match(model_num, ad->model_num)) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004258 if (ad->model_rev == NULL)
4259 return ad->horkage;
Mark Lordbce036c2010-07-01 18:16:14 -04004260 if (!glob_match(model_rev, ad->model_rev))
Alan Cox6919a0a2006-10-27 19:08:46 -07004261 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004262 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004263 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004264 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004265 return 0;
4266}
4267
Alan Cox6919a0a2006-10-27 19:08:46 -07004268static int ata_dma_blacklisted(const struct ata_device *dev)
4269{
4270 /* We don't support polling DMA.
4271 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4272 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4273 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004274 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004275 (dev->flags & ATA_DFLAG_CDB_INTR))
4276 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004277 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004278}
4279
Tejun Heoa6d5a512006-03-06 04:31:57 +09004280/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004281 * ata_is_40wire - check drive side detection
4282 * @dev: device
4283 *
4284 * Perform drive side detection decoding, allowing for device vendors
4285 * who can't follow the documentation.
4286 */
4287
4288static int ata_is_40wire(struct ata_device *dev)
4289{
4290 if (dev->horkage & ATA_HORKAGE_IVB)
4291 return ata_drive_40wire_relaxed(dev->id);
4292 return ata_drive_40wire(dev->id);
4293}
4294
4295/**
Alan Cox15a55512008-03-28 14:33:46 -07004296 * cable_is_40wire - 40/80/SATA decider
4297 * @ap: port to consider
4298 *
4299 * This function encapsulates the policy for speed management
4300 * in one place. At the moment we don't cache the result but
4301 * there is a good case for setting ap->cbl to the result when
4302 * we are called with unknown cables (and figuring out if it
4303 * impacts hotplug at all).
4304 *
4305 * Return 1 if the cable appears to be 40 wire.
4306 */
4307
4308static int cable_is_40wire(struct ata_port *ap)
4309{
4310 struct ata_link *link;
4311 struct ata_device *dev;
4312
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004313 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004314 if (ap->cbl == ATA_CBL_PATA40)
4315 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004316
4317 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004318 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4319 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004320
4321 /* If the system is known to be 40 wire short cable (eg
4322 * laptop), then we allow 80 wire modes even if the drive
4323 * isn't sure.
4324 */
Alan Coxf7920682008-04-08 16:37:50 +01004325 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4326 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004327
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004328 /* If the controller doesn't know, we scan.
4329 *
4330 * Note: We look for all 40 wire detects at this point. Any
4331 * 80 wire detect is taken to be 80 wire cable because
4332 * - in many setups only the one drive (slave if present) will
4333 * give a valid detect
4334 * - if you have a non detect capable drive you don't want it
4335 * to colour the choice
4336 */
Tejun Heo1eca4362008-11-03 20:03:17 +09004337 ata_for_each_link(link, ap, EDGE) {
4338 ata_for_each_dev(dev, link, ENABLED) {
4339 if (!ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004340 return 0;
4341 }
4342 }
4343 return 1;
4344}
4345
4346/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004347 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004348 * @dev: Device to compute xfermask for
4349 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004350 * Compute supported xfermask of @dev and store it in
4351 * dev->*_mask. This function is responsible for applying all
4352 * known limits including host controller limits, device
4353 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004354 *
4355 * LOCKING:
4356 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004357 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004358static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004359{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004360 struct ata_link *link = dev->link;
4361 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004362 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004363 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364
Tejun Heo37deecb2006-08-10 16:59:07 +09004365 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004366 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4367 ap->mwdma_mask, ap->udma_mask);
4368
Robert Hancock8343f882007-03-06 02:37:51 -08004369 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004370 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4371 dev->mwdma_mask, dev->udma_mask);
4372 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004373
Alan Coxb352e572006-08-10 18:52:12 +01004374 /*
4375 * CFA Advanced TrueIDE timings are not allowed on a shared
4376 * cable
4377 */
4378 if (ata_dev_pair(dev)) {
4379 /* No PIO5 or PIO6 */
4380 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4381 /* No MWDMA3 or MWDMA 4 */
4382 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4383 }
4384
Tejun Heo37deecb2006-08-10 16:59:07 +09004385 if (ata_dma_blacklisted(dev)) {
4386 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Joe Perchesa9a79df2011-04-15 15:51:59 -07004387 ata_dev_warn(dev,
4388 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004389 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004390
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004391 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004392 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004393 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Joe Perchesa9a79df2011-04-15 15:51:59 -07004394 ata_dev_warn(dev,
4395 "simplex DMA is claimed by other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004396 }
Tejun Heo565083e2006-04-02 17:54:47 +09004397
Jeff Garzike4246752007-03-09 09:56:46 -05004398 if (ap->flags & ATA_FLAG_NO_IORDY)
4399 xfer_mask &= ata_pio_mask_no_iordy(dev);
4400
Alan Cox5444a6f2006-03-27 18:58:20 +01004401 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004402 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004403
Robert Hancock8343f882007-03-06 02:37:51 -08004404 /* Apply cable rule here. Don't apply it early because when
4405 * we handle hot plug the cable type can itself change.
4406 * Check this last so that we know if the transfer rate was
4407 * solely limited by the cable.
4408 * Unknown or 80 wire cables reported host side are checked
4409 * drive side as well. Cases where we know a 40wire cable
4410 * is used safely for 80 are not checked here.
4411 */
4412 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4413 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004414 if (cable_is_40wire(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004415 ata_dev_warn(dev,
4416 "limited to UDMA/33 due to 40-wire cable\n");
Robert Hancock8343f882007-03-06 02:37:51 -08004417 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4418 }
4419
Tejun Heo565083e2006-04-02 17:54:47 +09004420 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4421 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004422}
4423
Linus Torvalds1da177e2005-04-16 15:20:36 -07004424/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004425 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004426 * @dev: Device to which command will be sent
4427 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004428 * Issue SET FEATURES - XFER MODE command to device @dev
4429 * on port @ap.
4430 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004431 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004432 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004433 *
4434 * RETURNS:
4435 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004436 */
4437
Tejun Heo3373efd2006-05-15 20:57:53 +09004438static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004439{
Tejun Heoa0123702005-12-13 14:49:31 +09004440 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004441 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004442
4443 /* set up set-features taskfile */
4444 DPRINTK("set features - xfer mode\n");
4445
Tejun Heo464cf172007-05-27 15:10:40 +02004446 /* Some controllers and ATAPI devices show flaky interrupt
4447 * behavior after setting xfer mode. Use polling instead.
4448 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004449 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004450 tf.command = ATA_CMD_SET_FEATURES;
4451 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004452 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004453 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004454 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004455 if (ata_pio_need_iordy(dev))
4456 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004457 /* If the device has IORDY and the controller does not - turn it off */
4458 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004459 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004460 else /* In the ancient relic department - skip all of this */
4461 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004462
Tejun Heo2b789102007-10-09 15:05:44 +09004463 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004464
Tejun Heo83206a22006-03-24 15:25:31 +09004465 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4466 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004467}
Tejun Heo1152b262010-09-01 17:50:05 +02004468
Linus Torvalds1da177e2005-04-16 15:20:36 -07004469/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004470 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004471 * @dev: Device to which command will be sent
4472 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004473 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004474 *
4475 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004476 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004477 *
4478 * LOCKING:
4479 * PCI/etc. bus probe sem.
4480 *
4481 * RETURNS:
4482 * 0 on success, AC_ERR_* mask otherwise.
4483 */
Tejun Heo1152b262010-09-01 17:50:05 +02004484unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004485{
4486 struct ata_taskfile tf;
4487 unsigned int err_mask;
4488
4489 /* set up set-features taskfile */
4490 DPRINTK("set features - SATA features\n");
4491
4492 ata_tf_init(dev, &tf);
4493 tf.command = ATA_CMD_SET_FEATURES;
4494 tf.feature = enable;
4495 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4496 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004497 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004498
Tejun Heo2b789102007-10-09 15:05:44 +09004499 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004500
4501 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4502 return err_mask;
4503}
Jeff Garzik633de4c2012-09-13 01:12:29 -04004504EXPORT_SYMBOL_GPL(ata_dev_set_feature);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004505
4506/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04004507 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04004508 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004509 * @heads: Number of heads (taskfile parameter)
4510 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004511 *
4512 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004513 * Kernel thread context (may sleep)
4514 *
4515 * RETURNS:
4516 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04004517 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004518static unsigned int ata_dev_init_params(struct ata_device *dev,
4519 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004520{
Tejun Heoa0123702005-12-13 14:49:31 +09004521 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004522 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004523
4524 /* Number of sectors per track 1-255. Number of heads 1-16 */
4525 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004526 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004527
4528 /* set up init dev params taskfile */
4529 DPRINTK("init dev params \n");
4530
Tejun Heo3373efd2006-05-15 20:57:53 +09004531 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004532 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4533 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4534 tf.protocol = ATA_PROT_NODATA;
4535 tf.nsect = sectors;
4536 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04004537
Tejun Heo2b789102007-10-09 15:05:44 +09004538 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004539 /* A clean abort indicates an original or just out of spec drive
4540 and we should continue as we issue the setup based on the
4541 drive reported working geometry */
4542 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4543 err_mask = 0;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004544
Tejun Heo6aff8f12006-02-15 18:24:09 +09004545 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4546 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004547}
4548
4549/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004550 * ata_sg_clean - Unmap DMA memory associated with command
4551 * @qc: Command containing DMA memory to be released
4552 *
4553 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004554 *
4555 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004556 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004557 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004558void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004559{
4560 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004561 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004562 int dir = qc->dma_dir;
4563
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004564 WARN_ON_ONCE(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004565
James Bottomleydde20202008-02-19 11:36:56 +01004566 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567
James Bottomleydde20202008-02-19 11:36:56 +01004568 if (qc->n_elem)
FUJITA Tomonori58256272009-02-27 17:35:43 +09004569 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004570
4571 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004572 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004573}
4574
4575/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004576 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004577 * @qc: Metadata associated with taskfile to check
4578 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004579 * Allow low-level driver to filter ATA PACKET commands, returning
4580 * a status indicating whether or not it is OK to use DMA for the
4581 * supplied PACKET command.
4582 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004583 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004584 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004585 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004586 * RETURNS: 0 when ATAPI DMA can be used
4587 * nonzero otherwise
4588 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004589int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004590{
4591 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004592
Tejun Heob9a41972007-06-27 02:48:43 +09004593 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4594 * few ATAPI devices choke on such DMA requests.
4595 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004596 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4597 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004598 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004599
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004601 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004602
Tejun Heob9a41972007-06-27 02:48:43 +09004603 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004604}
Tejun Heob9a41972007-06-27 02:48:43 +09004605
Linus Torvalds1da177e2005-04-16 15:20:36 -07004606/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004607 * ata_std_qc_defer - Check whether a qc needs to be deferred
4608 * @qc: ATA command in question
4609 *
4610 * Non-NCQ commands cannot run with any other command, NCQ or
4611 * not. As upper layer only knows the queue depth, we are
4612 * responsible for maintaining exclusion. This function checks
4613 * whether a new command @qc can be issued.
4614 *
4615 * LOCKING:
4616 * spin_lock_irqsave(host lock)
4617 *
4618 * RETURNS:
4619 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4620 */
4621int ata_std_qc_defer(struct ata_queued_cmd *qc)
4622{
4623 struct ata_link *link = qc->dev->link;
4624
4625 if (qc->tf.protocol == ATA_PROT_NCQ) {
4626 if (!ata_tag_valid(link->active_tag))
4627 return 0;
4628 } else {
4629 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4630 return 0;
4631 }
4632
4633 return ATA_DEFER_LINK;
4634}
4635
Brian Kinge46834c2006-03-17 17:04:03 -06004636void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4637
Jeff Garzik0cba6322005-05-30 19:49:12 -04004638/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004639 * ata_sg_init - Associate command with scatter-gather table.
4640 * @qc: Command to be associated
4641 * @sg: Scatter-gather table.
4642 * @n_elem: Number of elements in s/g table.
4643 *
4644 * Initialize the data-related elements of queued_cmd @qc
4645 * to point to a scatter-gather table @sg, containing @n_elem
4646 * elements.
4647 *
4648 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004649 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004650 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004651void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4652 unsigned int n_elem)
4653{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004654 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004655 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004656 qc->cursg = qc->sg;
4657}
4658
Linus Torvalds1da177e2005-04-16 15:20:36 -07004659/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004660 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4661 * @qc: Command with scatter-gather table to be mapped.
4662 *
4663 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004664 *
4665 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004666 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004667 *
4668 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004669 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004670 *
4671 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004672static int ata_sg_setup(struct ata_queued_cmd *qc)
4673{
4674 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004675 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676
Tejun Heo44877b42007-02-21 01:06:51 +09004677 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004678
James Bottomleydde20202008-02-19 11:36:56 +01004679 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4680 if (n_elem < 1)
4681 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004682
James Bottomleydde20202008-02-19 11:36:56 +01004683 DPRINTK("%d sg elements mapped\n", n_elem);
FUJITA Tomonori58256272009-02-27 17:35:43 +09004684 qc->orig_n_elem = qc->n_elem;
James Bottomleydde20202008-02-19 11:36:56 +01004685 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004686 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004687
4688 return 0;
4689}
4690
4691/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004692 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004693 * @buf: Buffer to swap
4694 * @buf_words: Number of 16-bit words in buffer.
4695 *
4696 * Swap halves of 16-bit words if needed to convert from
4697 * little-endian byte order to native cpu byte order, or
4698 * vice-versa.
4699 *
4700 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004701 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004702 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004703void swap_buf_le16(u16 *buf, unsigned int buf_words)
4704{
4705#ifdef __BIG_ENDIAN
4706 unsigned int i;
4707
4708 for (i = 0; i < buf_words; i++)
4709 buf[i] = le16_to_cpu(buf[i]);
4710#endif /* __BIG_ENDIAN */
4711}
4712
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004713/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004714 * ata_qc_new - Request an available ATA command, for queueing
Randy Dunlap5eb66fe2009-01-20 16:28:59 -08004715 * @ap: target port
Tejun Heo8a8bc222008-11-10 14:48:21 +09004716 *
4717 * LOCKING:
4718 * None.
4719 */
4720
4721static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4722{
4723 struct ata_queued_cmd *qc = NULL;
4724 unsigned int i;
4725
4726 /* no command while frozen */
4727 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4728 return NULL;
4729
4730 /* the last tag is reserved for internal command. */
4731 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4732 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4733 qc = __ata_qc_from_tag(ap, i);
4734 break;
4735 }
4736
4737 if (qc)
4738 qc->tag = i;
4739
4740 return qc;
4741}
4742
4743/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004744 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004745 * @dev: Device from whom we request an available command structure
4746 *
4747 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004748 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749 */
4750
Tejun Heo8a8bc222008-11-10 14:48:21 +09004751struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004752{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004753 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004754 struct ata_queued_cmd *qc;
4755
Tejun Heo8a8bc222008-11-10 14:48:21 +09004756 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004757 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004758 qc->scsicmd = NULL;
4759 qc->ap = ap;
4760 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004761
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004762 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004763 }
4764
4765 return qc;
4766}
4767
Tejun Heo8a8bc222008-11-10 14:48:21 +09004768/**
4769 * ata_qc_free - free unused ata_queued_cmd
4770 * @qc: Command to complete
4771 *
4772 * Designed to free unused ata_queued_cmd object
4773 * in case something prevents using it.
4774 *
4775 * LOCKING:
4776 * spin_lock_irqsave(host lock)
4777 */
4778void ata_qc_free(struct ata_queued_cmd *qc)
4779{
Julia Lawalla1104012009-10-17 08:41:47 +02004780 struct ata_port *ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004781 unsigned int tag;
4782
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004783 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Julia Lawalla1104012009-10-17 08:41:47 +02004784 ap = qc->ap;
Tejun Heo8a8bc222008-11-10 14:48:21 +09004785
4786 qc->flags = 0;
4787 tag = qc->tag;
4788 if (likely(ata_tag_valid(tag))) {
4789 qc->tag = ATA_TAG_POISON;
4790 clear_bit(tag, &ap->qc_allocated);
4791 }
4792}
4793
Tejun Heo76014422006-02-11 15:13:49 +09004794void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004795{
Julia Lawalla1104012009-10-17 08:41:47 +02004796 struct ata_port *ap;
4797 struct ata_link *link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004798
Tejun Heoefcb3cf2009-01-09 19:19:14 +09004799 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4800 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
Julia Lawalla1104012009-10-17 08:41:47 +02004801 ap = qc->ap;
4802 link = qc->dev->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004803
4804 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4805 ata_sg_clean(qc);
4806
Tejun Heo7401abf2006-05-15 20:57:32 +09004807 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004808 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004809 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004810 if (!link->sactive)
4811 ap->nr_active_links--;
4812 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004813 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004814 ap->nr_active_links--;
4815 }
4816
4817 /* clear exclusive status */
4818 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4819 ap->excl_link == link))
4820 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004821
Albert Lee3f3791d2005-08-16 14:25:38 +08004822 /* atapi: mark qc as inactive to prevent the interrupt handler
4823 * from completing the command twice later, before the error handler
4824 * is called. (when rc != 0 and atapi request sense is needed)
4825 */
4826 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004827 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004828
Linus Torvalds1da177e2005-04-16 15:20:36 -07004829 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004830 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004831}
4832
Tejun Heo39599a52006-11-14 22:37:35 +09004833static void fill_result_tf(struct ata_queued_cmd *qc)
4834{
4835 struct ata_port *ap = qc->ap;
4836
Tejun Heo39599a52006-11-14 22:37:35 +09004837 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004838 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004839}
4840
Tejun Heo00115e02007-11-27 19:28:58 +09004841static void ata_verify_xfer(struct ata_queued_cmd *qc)
4842{
4843 struct ata_device *dev = qc->dev;
4844
Tejun Heo00115e02007-11-27 19:28:58 +09004845 if (ata_is_nodata(qc->tf.protocol))
4846 return;
4847
4848 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4849 return;
4850
4851 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4852}
4853
Tejun Heof686bcb2006-05-15 20:58:05 +09004854/**
4855 * ata_qc_complete - Complete an active ATA command
4856 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004857 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004858 * Indicate to the mid and upper layers that an ATA command has
4859 * completed, with either an ok or not-ok status.
4860 *
4861 * Refrain from calling this function multiple times when
4862 * successfully completing multiple NCQ commands.
4863 * ata_qc_complete_multiple() should be used instead, which will
4864 * properly update IRQ expect state.
Tejun Heof686bcb2006-05-15 20:58:05 +09004865 *
4866 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004867 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004868 */
4869void ata_qc_complete(struct ata_queued_cmd *qc)
4870{
4871 struct ata_port *ap = qc->ap;
4872
4873 /* XXX: New EH and old EH use different mechanisms to
4874 * synchronize EH with regular execution path.
4875 *
4876 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4877 * Normal execution path is responsible for not accessing a
4878 * failed qc. libata core enforces the rule by returning NULL
4879 * from ata_qc_from_tag() for failed qcs.
4880 *
4881 * Old EH depends on ata_qc_complete() nullifying completion
4882 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4883 * not synchronize with interrupt handler. Only PIO task is
4884 * taken care of.
4885 */
4886 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004887 struct ata_device *dev = qc->dev;
4888 struct ata_eh_info *ehi = &dev->link->eh_info;
4889
Tejun Heof686bcb2006-05-15 20:58:05 +09004890 if (unlikely(qc->err_mask))
4891 qc->flags |= ATA_QCFLAG_FAILED;
4892
Tejun Heof08dc1a2010-12-09 15:59:32 +01004893 /*
4894 * Finish internal commands without any further processing
4895 * and always with the result TF filled.
4896 */
4897 if (unlikely(ata_tag_internal(qc->tag))) {
Tejun Heof4b31db92009-10-16 13:00:51 +09004898 fill_result_tf(qc);
Tejun Heof08dc1a2010-12-09 15:59:32 +01004899 __ata_qc_complete(qc);
4900 return;
4901 }
Tejun Heof4b31db92009-10-16 13:00:51 +09004902
Tejun Heof08dc1a2010-12-09 15:59:32 +01004903 /*
4904 * Non-internal qc has failed. Fill the result TF and
4905 * summon EH.
4906 */
4907 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4908 fill_result_tf(qc);
4909 ata_qc_schedule_eh(qc);
Tejun Heof4b31db92009-10-16 13:00:51 +09004910 return;
Tejun Heof686bcb2006-05-15 20:58:05 +09004911 }
4912
Tejun Heo4dc738e2009-09-17 18:45:27 +09004913 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4914
Tejun Heof686bcb2006-05-15 20:58:05 +09004915 /* read result TF if requested */
4916 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004917 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004918
Tejun Heo4dbfa392007-10-25 18:22:44 +09004919 /* Some commands need post-processing after successful
4920 * completion.
4921 */
4922 switch (qc->tf.command) {
4923 case ATA_CMD_SET_FEATURES:
4924 if (qc->tf.feature != SETFEATURES_WC_ON &&
4925 qc->tf.feature != SETFEATURES_WC_OFF)
4926 break;
4927 /* fall through */
4928 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4929 case ATA_CMD_SET_MULTI: /* multi_count changed */
4930 /* revalidate device */
4931 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4932 ata_port_schedule_eh(ap);
4933 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004934
4935 case ATA_CMD_SLEEP:
4936 dev->flags |= ATA_DFLAG_SLEEPING;
4937 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09004938 }
4939
Tejun Heo00115e02007-11-27 19:28:58 +09004940 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4941 ata_verify_xfer(qc);
4942
Tejun Heof686bcb2006-05-15 20:58:05 +09004943 __ata_qc_complete(qc);
4944 } else {
4945 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4946 return;
4947
4948 /* read result TF if failed or requested */
4949 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004950 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004951
4952 __ata_qc_complete(qc);
4953 }
4954}
4955
Tejun Heodedaf2b2006-05-15 21:03:43 +09004956/**
4957 * ata_qc_complete_multiple - Complete multiple qcs successfully
4958 * @ap: port in question
4959 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09004960 *
4961 * Complete in-flight commands. This functions is meant to be
4962 * called from low-level driver's interrupt routine to complete
4963 * requests normally. ap->qc_active and @qc_active is compared
4964 * and commands are completed accordingly.
4965 *
Tejun Heo1aadf5c2010-06-25 15:03:34 +02004966 * Always use this function when completing multiple NCQ commands
4967 * from IRQ handlers instead of calling ata_qc_complete()
4968 * multiple times to keep IRQ expect status properly in sync.
4969 *
Tejun Heodedaf2b2006-05-15 21:03:43 +09004970 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004971 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004972 *
4973 * RETURNS:
4974 * Number of completed commands on success, -errno otherwise.
4975 */
Tejun Heo79f97da2008-04-07 22:47:20 +09004976int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004977{
4978 int nr_done = 0;
4979 u32 done_mask;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004980
4981 done_mask = ap->qc_active ^ qc_active;
4982
4983 if (unlikely(done_mask & qc_active)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07004984 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
4985 ap->qc_active, qc_active);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004986 return -EINVAL;
4987 }
4988
Jens Axboe43768182009-05-20 09:44:39 +02004989 while (done_mask) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004990 struct ata_queued_cmd *qc;
Jens Axboe43768182009-05-20 09:44:39 +02004991 unsigned int tag = __ffs(done_mask);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004992
Jens Axboe43768182009-05-20 09:44:39 +02004993 qc = ata_qc_from_tag(ap, tag);
4994 if (qc) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004995 ata_qc_complete(qc);
4996 nr_done++;
4997 }
Jens Axboe43768182009-05-20 09:44:39 +02004998 done_mask &= ~(1 << tag);
Tejun Heodedaf2b2006-05-15 21:03:43 +09004999 }
5000
5001 return nr_done;
5002}
5003
Linus Torvalds1da177e2005-04-16 15:20:36 -07005004/**
5005 * ata_qc_issue - issue taskfile to device
5006 * @qc: command to issue to device
5007 *
5008 * Prepare an ATA command to submission to device.
5009 * This includes mapping the data into a DMA-able
5010 * area, filling in the S/G table, and finally
5011 * writing the taskfile to hardware, starting the command.
5012 *
5013 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005014 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005015 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09005016void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005017{
5018 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005019 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09005020 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005021
Tejun Heodedaf2b2006-05-15 21:03:43 +09005022 /* Make sure only one non-NCQ command is outstanding. The
5023 * check is skipped for old EH because it reuses active qc to
5024 * request ATAPI sense.
5025 */
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005026 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09005027
Tejun Heo1973a022007-12-05 10:36:13 +09005028 if (ata_is_ncq(prot)) {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005029 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09005030
5031 if (!link->sactive)
5032 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005033 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005034 } else {
Tejun Heoefcb3cf2009-01-09 19:19:14 +09005035 WARN_ON_ONCE(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09005036
5037 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005038 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005039 }
5040
Tejun Heoe4a70e72006-03-31 20:36:47 +09005041 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005042 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005043
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005044 /*
5045 * We guarantee to LLDs that they will have at least one
Tejun Heof92a2632007-12-05 16:43:10 +09005046 * non-zero sg if the command is a data command.
5047 */
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005048 if (WARN_ON_ONCE(ata_is_data(prot) &&
5049 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5050 goto sys_err;
Tejun Heof92a2632007-12-05 16:43:10 +09005051
Tejun Heo405e66b2007-11-27 19:28:53 +09005052 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09005053 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09005054 if (ata_sg_setup(qc))
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005055 goto sys_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005056
Tejun Heocf480622008-01-24 00:05:14 +09005057 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09005058 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09005059 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005060 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5061 ata_link_abort(link);
5062 return;
5063 }
5064
Linus Torvalds1da177e2005-04-16 15:20:36 -07005065 ap->ops->qc_prep(qc);
5066
Tejun Heo8e0e6942006-03-31 20:41:11 +09005067 qc->err_mask |= ap->ops->qc_issue(qc);
5068 if (unlikely(qc->err_mask))
5069 goto err;
5070 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005071
Tejun Heo60f5d6e2010-08-23 11:27:27 +02005072sys_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09005073 qc->err_mask |= AC_ERR_SYSTEM;
5074err:
5075 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005076}
5077
5078/**
Tejun Heo34bf2172006-05-15 20:57:46 +09005079 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09005080 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09005081 *
Tejun Heo936fd732007-08-06 18:36:23 +09005082 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09005083 *
5084 * LOCKING:
5085 * None.
5086 *
5087 * RETURNS:
5088 * 1 if SCRs are accessible, 0 otherwise.
5089 */
Tejun Heo936fd732007-08-06 18:36:23 +09005090int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005091{
Tejun Heo936fd732007-08-06 18:36:23 +09005092 struct ata_port *ap = link->ap;
5093
Tejun Heoa16abc02007-05-21 18:33:47 +02005094 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005095}
5096
5097/**
5098 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005099 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005100 * @reg: SCR to read
5101 * @val: Place to store read value
5102 *
Tejun Heo936fd732007-08-06 18:36:23 +09005103 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005104 * guaranteed to succeed if @link is ap->link, the cable type of
5105 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005106 *
5107 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005108 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005109 *
5110 * RETURNS:
5111 * 0 on success, negative errno on failure.
5112 */
Tejun Heo936fd732007-08-06 18:36:23 +09005113int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005114{
Tejun Heo633273a2007-09-23 13:19:54 +09005115 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005116 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005117 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005118 return -EOPNOTSUPP;
5119 }
5120
5121 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005122}
5123
5124/**
5125 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005126 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005127 * @reg: SCR to write
5128 * @val: value to write
5129 *
Tejun Heo936fd732007-08-06 18:36:23 +09005130 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005131 * guaranteed to succeed if @link is ap->link, the cable type of
5132 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005133 *
5134 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005135 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005136 *
5137 * RETURNS:
5138 * 0 on success, negative errno on failure.
5139 */
Tejun Heo936fd732007-08-06 18:36:23 +09005140int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005141{
Tejun Heo633273a2007-09-23 13:19:54 +09005142 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005143 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005144 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005145 return -EOPNOTSUPP;
5146 }
5147
5148 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005149}
5150
5151/**
5152 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005153 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005154 * @reg: SCR to write
5155 * @val: value to write
5156 *
5157 * This function is identical to sata_scr_write() except that this
5158 * function performs flush after writing to the register.
5159 *
5160 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005161 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005162 *
5163 * RETURNS:
5164 * 0 on success, negative errno on failure.
5165 */
Tejun Heo936fd732007-08-06 18:36:23 +09005166int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005167{
Tejun Heo633273a2007-09-23 13:19:54 +09005168 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005169 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005170
Tejun Heo633273a2007-09-23 13:19:54 +09005171 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005172 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005173 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005174 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a2007-09-23 13:19:54 +09005175 return rc;
5176 }
5177 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005178 }
Tejun Heo633273a2007-09-23 13:19:54 +09005179
5180 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005181}
5182
5183/**
Tejun Heob1c72912008-07-31 17:02:43 +09005184 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005185 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005186 *
Tejun Heo936fd732007-08-06 18:36:23 +09005187 * Test whether @link is online. Note that this function returns
5188 * 0 if online status of @link cannot be obtained, so
5189 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005190 *
5191 * LOCKING:
5192 * None.
5193 *
5194 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005195 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005196 */
Tejun Heob1c72912008-07-31 17:02:43 +09005197bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005198{
5199 u32 sstatus;
5200
Tejun Heo936fd732007-08-06 18:36:23 +09005201 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005202 ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005203 return true;
5204 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005205}
5206
5207/**
Tejun Heob1c72912008-07-31 17:02:43 +09005208 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005209 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005210 *
Tejun Heo936fd732007-08-06 18:36:23 +09005211 * Test whether @link is offline. Note that this function
5212 * returns 0 if offline status of @link cannot be obtained, so
5213 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005214 *
5215 * LOCKING:
5216 * None.
5217 *
5218 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005219 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005220 */
Tejun Heob1c72912008-07-31 17:02:43 +09005221bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005222{
5223 u32 sstatus;
5224
Tejun Heo936fd732007-08-06 18:36:23 +09005225 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
Tejun Heo9913ff82009-01-29 20:31:31 +09005226 !ata_sstatus_online(sstatus))
Tejun Heob5b3fa32008-07-31 17:02:42 +09005227 return true;
5228 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005229}
Edward Falk0baab862005-06-02 18:17:13 -04005230
Tejun Heob1c72912008-07-31 17:02:43 +09005231/**
5232 * ata_link_online - test whether the given link is online
5233 * @link: ATA link to test
5234 *
5235 * Test whether @link is online. This is identical to
5236 * ata_phys_link_online() when there's no slave link. When
5237 * there's a slave link, this function should only be called on
5238 * the master link and will return true if any of M/S links is
5239 * online.
5240 *
5241 * LOCKING:
5242 * None.
5243 *
5244 * RETURNS:
5245 * True if the port online status is available and online.
5246 */
5247bool ata_link_online(struct ata_link *link)
5248{
5249 struct ata_link *slave = link->ap->slave_link;
5250
5251 WARN_ON(link == slave); /* shouldn't be called on slave link */
5252
5253 return ata_phys_link_online(link) ||
5254 (slave && ata_phys_link_online(slave));
5255}
5256
5257/**
5258 * ata_link_offline - test whether the given link is offline
5259 * @link: ATA link to test
5260 *
5261 * Test whether @link is offline. This is identical to
5262 * ata_phys_link_offline() when there's no slave link. When
5263 * there's a slave link, this function should only be called on
5264 * the master link and will return true if both M/S links are
5265 * offline.
5266 *
5267 * LOCKING:
5268 * None.
5269 *
5270 * RETURNS:
5271 * True if the port offline status is available and offline.
5272 */
5273bool ata_link_offline(struct ata_link *link)
5274{
5275 struct ata_link *slave = link->ap->slave_link;
5276
5277 WARN_ON(link == slave); /* shouldn't be called on slave link */
5278
5279 return ata_phys_link_offline(link) &&
5280 (!slave || ata_phys_link_offline(slave));
5281}
5282
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005283#ifdef CONFIG_PM
Lin Ming5ef41082011-12-05 09:20:27 +08005284static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
Jeff Garzikcca39742006-08-24 03:19:22 -04005285 unsigned int action, unsigned int ehi_flags,
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005286 int *async)
Tejun Heo500530f2006-07-03 16:07:27 +09005287{
Lin Ming5ef41082011-12-05 09:20:27 +08005288 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005289 unsigned long flags;
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005290 int rc = 0;
Tejun Heo500530f2006-07-03 16:07:27 +09005291
Lin Ming5ef41082011-12-05 09:20:27 +08005292 /* Previous resume operation might still be in
5293 * progress. Wait for PM_PENDING to clear.
5294 */
5295 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005296 if (async) {
5297 *async = -EAGAIN;
5298 return 0;
5299 }
Lin Ming5ef41082011-12-05 09:20:27 +08005300 ata_port_wait_eh(ap);
5301 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
Tejun Heo500530f2006-07-03 16:07:27 +09005302 }
5303
Lin Ming5ef41082011-12-05 09:20:27 +08005304 /* request PM ops to EH */
5305 spin_lock_irqsave(ap->lock, flags);
5306
5307 ap->pm_mesg = mesg;
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005308 if (async)
5309 ap->pm_result = async;
5310 else
Lin Ming5ef41082011-12-05 09:20:27 +08005311 ap->pm_result = &rc;
Lin Ming5ef41082011-12-05 09:20:27 +08005312
5313 ap->pflags |= ATA_PFLAG_PM_PENDING;
5314 ata_for_each_link(link, ap, HOST_FIRST) {
5315 link->eh_info.action |= action;
5316 link->eh_info.flags |= ehi_flags;
5317 }
5318
5319 ata_port_schedule_eh(ap);
5320
5321 spin_unlock_irqrestore(ap->lock, flags);
5322
5323 /* wait and check result */
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005324 if (!async) {
Lin Ming5ef41082011-12-05 09:20:27 +08005325 ata_port_wait_eh(ap);
5326 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5327 }
5328
5329 return rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005330}
5331
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005332static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
Lin Ming5ef41082011-12-05 09:20:27 +08005333{
Lin Ming33574d62011-12-22 14:50:49 +08005334 unsigned int ehi_flags = ATA_EHI_QUIET;
Lin Ming5ef41082011-12-05 09:20:27 +08005335 int rc;
5336
Lin Ming33574d62011-12-22 14:50:49 +08005337 /*
5338 * On some hardware, device fails to respond after spun down
5339 * for suspend. As the device won't be used before being
5340 * resumed, we don't need to touch the device. Ask EH to skip
5341 * the usual stuff and proceed directly to suspend.
5342 *
5343 * http://thread.gmane.org/gmane.linux.ide/46764
5344 */
5345 if (mesg.event == PM_EVENT_SUSPEND)
5346 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5347
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005348 rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
Lin Ming5ef41082011-12-05 09:20:27 +08005349 return rc;
5350}
5351
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005352static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
5353{
5354 struct ata_port *ap = to_ata_port(dev);
5355
5356 return __ata_port_suspend_common(ap, mesg, NULL);
5357}
5358
Lin Ming5ef41082011-12-05 09:20:27 +08005359static int ata_port_suspend(struct device *dev)
5360{
5361 if (pm_runtime_suspended(dev))
5362 return 0;
5363
Lin Ming33574d62011-12-22 14:50:49 +08005364 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5365}
5366
5367static int ata_port_do_freeze(struct device *dev)
5368{
5369 if (pm_runtime_suspended(dev))
5370 pm_runtime_resume(dev);
5371
5372 return ata_port_suspend_common(dev, PMSG_FREEZE);
5373}
5374
5375static int ata_port_poweroff(struct device *dev)
5376{
5377 if (pm_runtime_suspended(dev))
5378 return 0;
5379
5380 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
Lin Ming5ef41082011-12-05 09:20:27 +08005381}
5382
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005383static int __ata_port_resume_common(struct ata_port *ap, int *async)
Lin Ming5ef41082011-12-05 09:20:27 +08005384{
Lin Ming5ef41082011-12-05 09:20:27 +08005385 int rc;
5386
5387 rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005388 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
Lin Ming5ef41082011-12-05 09:20:27 +08005389 return rc;
5390}
5391
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005392static int ata_port_resume_common(struct device *dev)
5393{
5394 struct ata_port *ap = to_ata_port(dev);
5395
5396 return __ata_port_resume_common(ap, NULL);
5397}
5398
Lin Minge90b1e52011-12-22 14:50:48 +08005399static int ata_port_resume(struct device *dev)
5400{
5401 int rc;
5402
5403 rc = ata_port_resume_common(dev);
5404 if (!rc) {
5405 pm_runtime_disable(dev);
5406 pm_runtime_set_active(dev);
5407 pm_runtime_enable(dev);
5408 }
5409
5410 return rc;
5411}
5412
Lin Ming9ee4f392011-12-05 09:20:28 +08005413static int ata_port_runtime_idle(struct device *dev)
5414{
5415 return pm_runtime_suspend(dev);
5416}
5417
Lin Ming5ef41082011-12-05 09:20:27 +08005418static const struct dev_pm_ops ata_port_pm_ops = {
5419 .suspend = ata_port_suspend,
5420 .resume = ata_port_resume,
Lin Ming33574d62011-12-22 14:50:49 +08005421 .freeze = ata_port_do_freeze,
5422 .thaw = ata_port_resume,
5423 .poweroff = ata_port_poweroff,
5424 .restore = ata_port_resume,
Lin Ming9ee4f392011-12-05 09:20:28 +08005425
Lin Ming33574d62011-12-22 14:50:49 +08005426 .runtime_suspend = ata_port_suspend,
Lin Minge90b1e52011-12-22 14:50:48 +08005427 .runtime_resume = ata_port_resume_common,
Lin Ming9ee4f392011-12-05 09:20:28 +08005428 .runtime_idle = ata_port_runtime_idle,
Lin Ming5ef41082011-12-05 09:20:27 +08005429};
5430
Dan Williams2fcbdcb2012-06-21 23:41:46 -07005431/* sas ports don't participate in pm runtime management of ata_ports,
5432 * and need to resume ata devices at the domain level, not the per-port
5433 * level. sas suspend/resume is async to allow parallel port recovery
5434 * since sas has multiple ata_port instances per Scsi_Host.
5435 */
5436int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
5437{
5438 return __ata_port_suspend_common(ap, PMSG_SUSPEND, async);
5439}
5440EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
5441
5442int ata_sas_port_async_resume(struct ata_port *ap, int *async)
5443{
5444 return __ata_port_resume_common(ap, async);
5445}
5446EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
5447
5448
Tejun Heo500530f2006-07-03 16:07:27 +09005449/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005450 * ata_host_suspend - suspend host
5451 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005452 * @mesg: PM message
5453 *
Lin Ming5ef41082011-12-05 09:20:27 +08005454 * Suspend @host. Actual operation is performed by port suspend.
Tejun Heo500530f2006-07-03 16:07:27 +09005455 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005456int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005457{
Lin Ming5ef41082011-12-05 09:20:27 +08005458 host->dev->power.power_state = mesg;
5459 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09005460}
5461
5462/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005463 * ata_host_resume - resume host
5464 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005465 *
Lin Ming5ef41082011-12-05 09:20:27 +08005466 * Resume @host. Actual operation is performed by port resume.
Tejun Heo500530f2006-07-03 16:07:27 +09005467 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005468void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005469{
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005470 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005471}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005472#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005473
Lin Ming5ef41082011-12-05 09:20:27 +08005474struct device_type ata_port_type = {
5475 .name = "ata_port",
5476#ifdef CONFIG_PM
5477 .pm = &ata_port_pm_ops,
5478#endif
5479};
5480
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005481/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005482 * ata_dev_init - Initialize an ata_device structure
5483 * @dev: Device structure to initialize
5484 *
5485 * Initialize @dev in preparation for probing.
5486 *
5487 * LOCKING:
5488 * Inherited from caller.
5489 */
5490void ata_dev_init(struct ata_device *dev)
5491{
Tejun Heob1c72912008-07-31 17:02:43 +09005492 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005493 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005494 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005495
Tejun Heob1c72912008-07-31 17:02:43 +09005496 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005497 link->sata_spd_limit = link->hw_sata_spd_limit;
5498 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005499
Tejun Heo72fa4b72006-05-31 18:27:32 +09005500 /* High bits of dev->flags are used to record warm plug
5501 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005502 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005503 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005504 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005505 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005506 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005507 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005508
Tejun Heo99cf6102009-01-29 20:31:32 +09005509 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5510 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005511 dev->pio_mask = UINT_MAX;
5512 dev->mwdma_mask = UINT_MAX;
5513 dev->udma_mask = UINT_MAX;
5514}
5515
5516/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005517 * ata_link_init - Initialize an ata_link structure
5518 * @ap: ATA port link is attached to
5519 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005520 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005521 *
5522 * Initialize @link.
5523 *
5524 * LOCKING:
5525 * Kernel thread context (may sleep)
5526 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005527void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005528{
5529 int i;
5530
5531 /* clear everything except for devices */
Gwendal Grignoud9027472010-05-25 12:31:38 -07005532 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5533 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005534
5535 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005536 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005537 link->active_tag = ATA_TAG_POISON;
5538 link->hw_sata_spd_limit = UINT_MAX;
5539
5540 /* can't use iterator, ap isn't initialized yet */
5541 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5542 struct ata_device *dev = &link->device[i];
5543
5544 dev->link = link;
5545 dev->devno = dev - link->device;
Tejun Heo110f66d2009-09-16 04:17:28 +09005546#ifdef CONFIG_ATA_ACPI
5547 dev->gtf_filter = ata_acpi_gtf_filter;
5548#endif
Tejun Heo4fb37a22007-08-06 18:36:23 +09005549 ata_dev_init(dev);
5550 }
5551}
5552
5553/**
5554 * sata_link_init_spd - Initialize link->sata_spd_limit
5555 * @link: Link to configure sata_spd_limit for
5556 *
5557 * Initialize @link->[hw_]sata_spd_limit to the currently
5558 * configured value.
5559 *
5560 * LOCKING:
5561 * Kernel thread context (may sleep).
5562 *
5563 * RETURNS:
5564 * 0 on success, -errno on failure.
5565 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005566int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005567{
Tejun Heo33267322008-02-13 09:15:09 +09005568 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005569 int rc;
5570
Tejun Heod127ea72008-07-31 16:09:34 +09005571 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005572 if (rc)
5573 return rc;
5574
Tejun Heod127ea72008-07-31 16:09:34 +09005575 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005576 if (spd)
5577 link->hw_sata_spd_limit &= (1 << spd) - 1;
5578
Tejun Heo05944bd2008-08-13 20:19:09 +09005579 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005580
Tejun Heo4fb37a22007-08-06 18:36:23 +09005581 link->sata_spd_limit = link->hw_sata_spd_limit;
5582
5583 return 0;
5584}
5585
5586/**
Tejun Heof3187192007-04-17 23:44:07 +09005587 * ata_port_alloc - allocate and initialize basic ATA port resources
5588 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005589 *
Tejun Heof3187192007-04-17 23:44:07 +09005590 * Allocate and initialize basic ATA port resources.
5591 *
5592 * RETURNS:
5593 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005594 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005595 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005596 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005597 */
Tejun Heof3187192007-04-17 23:44:07 +09005598struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005599{
Tejun Heof3187192007-04-17 23:44:07 +09005600 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005601
Tejun Heof3187192007-04-17 23:44:07 +09005602 DPRINTK("ENTER\n");
5603
5604 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5605 if (!ap)
5606 return NULL;
Jeff Garzik4fca3772011-02-15 01:13:24 -05005607
Maxime Bizon7b3a24c2011-03-16 14:58:32 +01005608 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
Jeff Garzikcca39742006-08-24 03:19:22 -04005609 ap->lock = &host->lock;
Tejun Heof3187192007-04-17 23:44:07 +09005610 ap->print_id = -1;
Jeff Garzikcca39742006-08-24 03:19:22 -04005611 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005612 ap->dev = host->dev;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005613
5614#if defined(ATA_VERBOSE_DEBUG)
5615 /* turn on all debugging levels */
5616 ap->msg_enable = 0x00FF;
5617#elif defined(ATA_DEBUG)
5618 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 +09005619#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005620 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005621#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005622
Tejun Heoad72cf92010-07-02 10:03:52 +02005623 mutex_init(&ap->scsi_scan_mutex);
David Howells65f27f32006-11-22 14:55:48 +00005624 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5625 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005626 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005627 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005628 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005629 init_timer_deferrable(&ap->fastdrain_timer);
5630 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5631 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005632
Tejun Heo838df622006-05-15 20:57:44 +09005633 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005634
Tejun Heo89898052007-08-06 18:36:23 +09005635 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005636
5637#ifdef ATA_IRQ_TRAP
5638 ap->stats.unhandled_irq = 1;
5639 ap->stats.idle_irq = 1;
5640#endif
Tejun Heo270390e2010-05-10 21:41:35 +02005641 ata_sff_port_init(ap);
5642
Linus Torvalds1da177e2005-04-16 15:20:36 -07005643 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005644}
5645
Tejun Heof0d36ef2007-01-20 16:00:28 +09005646static void ata_host_release(struct device *gendev, void *res)
5647{
5648 struct ata_host *host = dev_get_drvdata(gendev);
5649 int i;
5650
5651 for (i = 0; i < host->n_ports; i++) {
5652 struct ata_port *ap = host->ports[i];
5653
Tejun Heoecef7252007-04-17 23:44:06 +09005654 if (!ap)
5655 continue;
5656
Tejun Heo49114872007-04-17 23:44:06 +09005657 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005658 scsi_host_put(ap->scsi_host);
5659
Tejun Heo633273a2007-09-23 13:19:54 +09005660 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005661 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005662 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005663 host->ports[i] = NULL;
5664 }
5665
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005666 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005667}
5668
Linus Torvalds1da177e2005-04-16 15:20:36 -07005669/**
Tejun Heof3187192007-04-17 23:44:07 +09005670 * ata_host_alloc - allocate and init basic ATA host resources
5671 * @dev: generic device this host is associated with
5672 * @max_ports: maximum number of ATA ports associated with this host
5673 *
5674 * Allocate and initialize basic ATA host resources. LLD calls
5675 * this function to allocate a host, initializes it fully and
5676 * attaches it using ata_host_register().
5677 *
5678 * @max_ports ports are allocated and host->n_ports is
5679 * initialized to @max_ports. The caller is allowed to decrease
5680 * host->n_ports before calling ata_host_register(). The unused
5681 * ports will be automatically freed on registration.
5682 *
5683 * RETURNS:
5684 * Allocate ATA host on success, NULL on failure.
5685 *
5686 * LOCKING:
5687 * Inherited from calling layer (may sleep).
5688 */
5689struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5690{
5691 struct ata_host *host;
5692 size_t sz;
5693 int i;
5694
5695 DPRINTK("ENTER\n");
5696
5697 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5698 return NULL;
5699
5700 /* alloc a container for our list of ATA ports (buses) */
5701 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5702 /* alloc a container for our list of ATA ports (buses) */
5703 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5704 if (!host)
5705 goto err_out;
5706
5707 devres_add(dev, host);
5708 dev_set_drvdata(dev, host);
5709
5710 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02005711 mutex_init(&host->eh_mutex);
Tejun Heof3187192007-04-17 23:44:07 +09005712 host->dev = dev;
5713 host->n_ports = max_ports;
5714
5715 /* allocate ports bound to this host */
5716 for (i = 0; i < max_ports; i++) {
5717 struct ata_port *ap;
5718
5719 ap = ata_port_alloc(host);
5720 if (!ap)
5721 goto err_out;
5722
5723 ap->port_no = i;
5724 host->ports[i] = ap;
5725 }
5726
5727 devres_remove_group(dev, NULL);
5728 return host;
5729
5730 err_out:
5731 devres_release_group(dev, NULL);
5732 return NULL;
5733}
5734
5735/**
Tejun Heof5cda252007-04-17 23:44:07 +09005736 * ata_host_alloc_pinfo - alloc host and init with port_info array
5737 * @dev: generic device this host is associated with
5738 * @ppi: array of ATA port_info to initialize host with
5739 * @n_ports: number of ATA ports attached to this host
5740 *
5741 * Allocate ATA host and initialize with info from @ppi. If NULL
5742 * terminated, @ppi may contain fewer entries than @n_ports. The
5743 * last entry will be used for the remaining ports.
5744 *
5745 * RETURNS:
5746 * Allocate ATA host on success, NULL on failure.
5747 *
5748 * LOCKING:
5749 * Inherited from calling layer (may sleep).
5750 */
5751struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5752 const struct ata_port_info * const * ppi,
5753 int n_ports)
5754{
5755 const struct ata_port_info *pi;
5756 struct ata_host *host;
5757 int i, j;
5758
5759 host = ata_host_alloc(dev, n_ports);
5760 if (!host)
5761 return NULL;
5762
5763 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5764 struct ata_port *ap = host->ports[i];
5765
5766 if (ppi[j])
5767 pi = ppi[j++];
5768
5769 ap->pio_mask = pi->pio_mask;
5770 ap->mwdma_mask = pi->mwdma_mask;
5771 ap->udma_mask = pi->udma_mask;
5772 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005773 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005774 ap->ops = pi->port_ops;
5775
5776 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5777 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005778 }
5779
5780 return host;
5781}
5782
Tejun Heob1c72912008-07-31 17:02:43 +09005783/**
5784 * ata_slave_link_init - initialize slave link
5785 * @ap: port to initialize slave link for
5786 *
5787 * Create and initialize slave link for @ap. This enables slave
5788 * link handling on the port.
5789 *
5790 * In libata, a port contains links and a link contains devices.
5791 * There is single host link but if a PMP is attached to it,
5792 * there can be multiple fan-out links. On SATA, there's usually
5793 * a single device connected to a link but PATA and SATA
5794 * controllers emulating TF based interface can have two - master
5795 * and slave.
5796 *
5797 * However, there are a few controllers which don't fit into this
5798 * abstraction too well - SATA controllers which emulate TF
5799 * interface with both master and slave devices but also have
5800 * separate SCR register sets for each device. These controllers
5801 * need separate links for physical link handling
5802 * (e.g. onlineness, link speed) but should be treated like a
5803 * traditional M/S controller for everything else (e.g. command
5804 * issue, softreset).
5805 *
5806 * slave_link is libata's way of handling this class of
5807 * controllers without impacting core layer too much. For
5808 * anything other than physical link handling, the default host
5809 * link is used for both master and slave. For physical link
5810 * handling, separate @ap->slave_link is used. All dirty details
5811 * are implemented inside libata core layer. From LLD's POV, the
5812 * only difference is that prereset, hardreset and postreset are
5813 * called once more for the slave link, so the reset sequence
5814 * looks like the following.
5815 *
5816 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5817 * softreset(M) -> postreset(M) -> postreset(S)
5818 *
5819 * Note that softreset is called only for the master. Softreset
5820 * resets both M/S by definition, so SRST on master should handle
5821 * both (the standard method will work just fine).
5822 *
5823 * LOCKING:
5824 * Should be called before host is registered.
5825 *
5826 * RETURNS:
5827 * 0 on success, -errno on failure.
5828 */
5829int ata_slave_link_init(struct ata_port *ap)
5830{
5831 struct ata_link *link;
5832
5833 WARN_ON(ap->slave_link);
5834 WARN_ON(ap->flags & ATA_FLAG_PMP);
5835
5836 link = kzalloc(sizeof(*link), GFP_KERNEL);
5837 if (!link)
5838 return -ENOMEM;
5839
5840 ata_link_init(ap, link, 1);
5841 ap->slave_link = link;
5842 return 0;
5843}
5844
Tejun Heo32ebbc02007-11-08 13:09:00 +09005845static void ata_host_stop(struct device *gendev, void *res)
5846{
5847 struct ata_host *host = dev_get_drvdata(gendev);
5848 int i;
5849
5850 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5851
5852 for (i = 0; i < host->n_ports; i++) {
5853 struct ata_port *ap = host->ports[i];
5854
5855 if (ap->ops->port_stop)
5856 ap->ops->port_stop(ap);
5857 }
5858
5859 if (host->ops->host_stop)
5860 host->ops->host_stop(host);
5861}
5862
Tejun Heof5cda252007-04-17 23:44:07 +09005863/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005864 * ata_finalize_port_ops - finalize ata_port_operations
5865 * @ops: ata_port_operations to finalize
5866 *
5867 * An ata_port_operations can inherit from another ops and that
5868 * ops can again inherit from another. This can go on as many
5869 * times as necessary as long as there is no loop in the
5870 * inheritance chain.
5871 *
5872 * Ops tables are finalized when the host is started. NULL or
5873 * unspecified entries are inherited from the closet ancestor
5874 * which has the method and the entry is populated with it.
5875 * After finalization, the ops table directly points to all the
5876 * methods and ->inherits is no longer necessary and cleared.
5877 *
5878 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5879 *
5880 * LOCKING:
5881 * None.
5882 */
5883static void ata_finalize_port_ops(struct ata_port_operations *ops)
5884{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305885 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005886 const struct ata_port_operations *cur;
5887 void **begin = (void **)ops;
5888 void **end = (void **)&ops->inherits;
5889 void **pp;
5890
5891 if (!ops || !ops->inherits)
5892 return;
5893
5894 spin_lock(&lock);
5895
5896 for (cur = ops->inherits; cur; cur = cur->inherits) {
5897 void **inherit = (void **)cur;
5898
5899 for (pp = begin; pp < end; pp++, inherit++)
5900 if (!*pp)
5901 *pp = *inherit;
5902 }
5903
5904 for (pp = begin; pp < end; pp++)
5905 if (IS_ERR(*pp))
5906 *pp = NULL;
5907
5908 ops->inherits = NULL;
5909
5910 spin_unlock(&lock);
5911}
5912
5913/**
Tejun Heoecef7252007-04-17 23:44:06 +09005914 * ata_host_start - start and freeze ports of an ATA host
5915 * @host: ATA host to start ports for
5916 *
5917 * Start and then freeze ports of @host. Started status is
5918 * recorded in host->flags, so this function can be called
5919 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005920 * once. If host->ops isn't initialized yet, its set to the
5921 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005922 *
5923 * LOCKING:
5924 * Inherited from calling layer (may sleep).
5925 *
5926 * RETURNS:
5927 * 0 if all ports are started successfully, -errno otherwise.
5928 */
5929int ata_host_start(struct ata_host *host)
5930{
Tejun Heo32ebbc02007-11-08 13:09:00 +09005931 int have_stop = 0;
5932 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09005933 int i, rc;
5934
5935 if (host->flags & ATA_HOST_STARTED)
5936 return 0;
5937
Tejun Heo029cfd62008-03-25 12:22:49 +09005938 ata_finalize_port_ops(host->ops);
5939
Tejun Heoecef7252007-04-17 23:44:06 +09005940 for (i = 0; i < host->n_ports; i++) {
5941 struct ata_port *ap = host->ports[i];
5942
Tejun Heo029cfd62008-03-25 12:22:49 +09005943 ata_finalize_port_ops(ap->ops);
5944
Tejun Heof3187192007-04-17 23:44:07 +09005945 if (!host->ops && !ata_port_is_dummy(ap))
5946 host->ops = ap->ops;
5947
Tejun Heo32ebbc02007-11-08 13:09:00 +09005948 if (ap->ops->port_stop)
5949 have_stop = 1;
5950 }
5951
5952 if (host->ops->host_stop)
5953 have_stop = 1;
5954
5955 if (have_stop) {
5956 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5957 if (!start_dr)
5958 return -ENOMEM;
5959 }
5960
5961 for (i = 0; i < host->n_ports; i++) {
5962 struct ata_port *ap = host->ports[i];
5963
Tejun Heoecef7252007-04-17 23:44:06 +09005964 if (ap->ops->port_start) {
5965 rc = ap->ops->port_start(ap);
5966 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00005967 if (rc != -ENODEV)
Joe Perchesa44fec12011-04-15 15:51:58 -07005968 dev_err(host->dev,
5969 "failed to start port %d (errno=%d)\n",
5970 i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09005971 goto err_out;
5972 }
5973 }
Tejun Heoecef7252007-04-17 23:44:06 +09005974 ata_eh_freeze_port(ap);
5975 }
5976
Tejun Heo32ebbc02007-11-08 13:09:00 +09005977 if (start_dr)
5978 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005979 host->flags |= ATA_HOST_STARTED;
5980 return 0;
5981
5982 err_out:
5983 while (--i >= 0) {
5984 struct ata_port *ap = host->ports[i];
5985
5986 if (ap->ops->port_stop)
5987 ap->ops->port_stop(ap);
5988 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09005989 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005990 return rc;
5991}
5992
5993/**
Dan Williams8d8e7d12012-07-09 21:06:08 -07005994 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
Jeff Garzikcca39742006-08-24 03:19:22 -04005995 * @host: host to initialize
5996 * @dev: device host is attached to
Jeff Garzikcca39742006-08-24 03:19:22 -04005997 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005998 *
Brian Kingb03732f2006-08-07 14:27:10 -05005999 */
Jeff Garzikcca39742006-08-24 03:19:22 -04006000void ata_host_init(struct ata_host *host, struct device *dev,
Dan Williams8d8e7d12012-07-09 21:06:08 -07006001 struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05006002{
Jeff Garzikcca39742006-08-24 03:19:22 -04006003 spin_lock_init(&host->lock);
Tejun Heoc0c362b2010-09-06 17:57:14 +02006004 mutex_init(&host->eh_mutex);
Jeff Garzikcca39742006-08-24 03:19:22 -04006005 host->dev = dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006006 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05006007}
6008
Dan Williams9508a662012-01-18 20:47:01 -08006009void __ata_port_probe(struct ata_port *ap)
6010{
6011 struct ata_eh_info *ehi = &ap->link.eh_info;
6012 unsigned long flags;
6013
6014 /* kick EH for boot probing */
6015 spin_lock_irqsave(ap->lock, flags);
6016
6017 ehi->probe_mask |= ATA_ALL_DEVICES;
6018 ehi->action |= ATA_EH_RESET;
6019 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6020
6021 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6022 ap->pflags |= ATA_PFLAG_LOADING;
6023 ata_port_schedule_eh(ap);
6024
6025 spin_unlock_irqrestore(ap->lock, flags);
6026}
6027
James Bottomley238c9cf2011-01-23 08:28:33 -06006028int ata_port_probe(struct ata_port *ap)
Arjan van de Ven79318052009-01-04 05:32:28 -08006029{
James Bottomley238c9cf2011-01-23 08:28:33 -06006030 int rc = 0;
Arjan van de Ven886ad092009-01-09 15:54:07 -08006031
Arjan van de Ven79318052009-01-04 05:32:28 -08006032 if (ap->ops->error_handler) {
Dan Williams9508a662012-01-18 20:47:01 -08006033 __ata_port_probe(ap);
Arjan van de Ven79318052009-01-04 05:32:28 -08006034 ata_port_wait_eh(ap);
6035 } else {
6036 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6037 rc = ata_bus_probe(ap);
6038 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Arjan van de Ven79318052009-01-04 05:32:28 -08006039 }
James Bottomley238c9cf2011-01-23 08:28:33 -06006040 return rc;
6041}
6042
6043
6044static void async_port_probe(void *data, async_cookie_t cookie)
6045{
6046 struct ata_port *ap = data;
Jeff Garzik4fca3772011-02-15 01:13:24 -05006047
James Bottomley238c9cf2011-01-23 08:28:33 -06006048 /*
6049 * If we're not allowed to scan this host in parallel,
6050 * we need to wait until all previous scans have completed
6051 * before going further.
6052 * Jeff Garzik says this is only within a controller, so we
6053 * don't need to wait for port 0, only for later ports.
6054 */
6055 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6056 async_synchronize_cookie(cookie);
6057
6058 (void)ata_port_probe(ap);
Arjan van de Venf29d3b22009-01-05 15:07:07 -08006059
6060 /* in order to keep device order, we need to synchronize at this point */
6061 async_synchronize_cookie(cookie);
6062
6063 ata_scsi_scan_host(ap, 1);
Arjan van de Ven79318052009-01-04 05:32:28 -08006064}
James Bottomley238c9cf2011-01-23 08:28:33 -06006065
Brian Kingb03732f2006-08-07 14:27:10 -05006066/**
Tejun Heof3187192007-04-17 23:44:07 +09006067 * ata_host_register - register initialized ATA host
6068 * @host: ATA host to register
6069 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04006070 *
Tejun Heof3187192007-04-17 23:44:07 +09006071 * Register initialized ATA host. @host is allocated using
6072 * ata_host_alloc() and fully initialized by LLD. This function
6073 * starts ports, registers @host with ATA and SCSI layers and
6074 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006075 *
6076 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006077 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006078 *
6079 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09006080 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006081 */
Tejun Heof3187192007-04-17 23:44:07 +09006082int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006083{
Tejun Heof3187192007-04-17 23:44:07 +09006084 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006085
Tejun Heof3187192007-04-17 23:44:07 +09006086 /* host must have been started */
6087 if (!(host->flags & ATA_HOST_STARTED)) {
Joe Perchesa44fec12011-04-15 15:51:58 -07006088 dev_err(host->dev, "BUG: trying to register unstarted host\n");
Tejun Heof3187192007-04-17 23:44:07 +09006089 WARN_ON(1);
6090 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01006091 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09006092
Tejun Heof3187192007-04-17 23:44:07 +09006093 /* Blow away unused ports. This happens when LLD can't
6094 * determine the exact number of ports to allocate at
6095 * allocation time.
6096 */
6097 for (i = host->n_ports; host->ports[i]; i++)
6098 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006099
Tejun Heof3187192007-04-17 23:44:07 +09006100 /* give ports names and add SCSI hosts */
6101 for (i = 0; i < host->n_ports; i++)
Dan Williams85d67252012-03-10 23:28:46 -08006102 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006103
Jeff Garzik4fca3772011-02-15 01:13:24 -05006104
Gwendal Grignoud9027472010-05-25 12:31:38 -07006105 /* Create associated sysfs transport objects */
6106 for (i = 0; i < host->n_ports; i++) {
6107 rc = ata_tport_add(host->dev,host->ports[i]);
6108 if (rc) {
6109 goto err_tadd;
6110 }
6111 }
6112
Tejun Heof3187192007-04-17 23:44:07 +09006113 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09006114 if (rc)
Gwendal Grignoud9027472010-05-25 12:31:38 -07006115 goto err_tadd;
Tejun Heoecef7252007-04-17 23:44:06 +09006116
Tejun Heof3187192007-04-17 23:44:07 +09006117 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04006118 for (i = 0; i < host->n_ports; i++) {
6119 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09006120 unsigned long xfer_mask;
6121
6122 /* set SATA cable type if still unset */
6123 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6124 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006125
Tejun Heo5a04bf42006-05-31 18:27:38 +09006126 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09006127 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09006128 if (ap->slave_link)
6129 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09006130
Tejun Heocbcdd872007-08-18 13:14:55 +09006131 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09006132 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6133 ap->udma_mask);
6134
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006135 if (!ata_port_is_dummy(ap)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -07006136 ata_port_info(ap, "%cATA max %s %s\n",
6137 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6138 ata_mode_string(xfer_mask),
6139 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09006140 ata_ehi_clear_desc(&ap->link.eh_info);
6141 } else
Joe Perchesa9a79df2011-04-15 15:51:59 -07006142 ata_port_info(ap, "DUMMY\n");
Tejun Heof3187192007-04-17 23:44:07 +09006143 }
6144
Vegard Nossumf6005352009-04-08 18:19:39 +02006145 /* perform each probe asynchronously */
Tejun Heof3187192007-04-17 23:44:07 +09006146 for (i = 0; i < host->n_ports; i++) {
6147 struct ata_port *ap = host->ports[i];
Arjan van de Ven79318052009-01-04 05:32:28 -08006148 async_schedule(async_port_probe, ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006149 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006150
Tejun Heof3187192007-04-17 23:44:07 +09006151 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006152
6153 err_tadd:
6154 while (--i >= 0) {
6155 ata_tport_delete(host->ports[i]);
6156 }
6157 return rc;
6158
Tejun Heof3187192007-04-17 23:44:07 +09006159}
6160
6161/**
Tejun Heof5cda252007-04-17 23:44:07 +09006162 * ata_host_activate - start host, request IRQ and register it
6163 * @host: target ATA host
6164 * @irq: IRQ to request
6165 * @irq_handler: irq_handler used when requesting IRQ
6166 * @irq_flags: irq_flags used when requesting IRQ
6167 * @sht: scsi_host_template to use when registering the host
6168 *
6169 * After allocating an ATA host and initializing it, most libata
6170 * LLDs perform three steps to activate the host - start host,
6171 * request IRQ and register it. This helper takes necessasry
6172 * arguments and performs the three steps in one go.
6173 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006174 * An invalid IRQ skips the IRQ registration and expects the host to
6175 * have set polling mode on the port. In this case, @irq_handler
6176 * should be NULL.
6177 *
Tejun Heof5cda252007-04-17 23:44:07 +09006178 * LOCKING:
6179 * Inherited from calling layer (may sleep).
6180 *
6181 * RETURNS:
6182 * 0 on success, -errno otherwise.
6183 */
6184int ata_host_activate(struct ata_host *host, int irq,
6185 irq_handler_t irq_handler, unsigned long irq_flags,
6186 struct scsi_host_template *sht)
6187{
Tejun Heocbcdd872007-08-18 13:14:55 +09006188 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006189
6190 rc = ata_host_start(host);
6191 if (rc)
6192 return rc;
6193
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006194 /* Special case for polling mode */
6195 if (!irq) {
6196 WARN_ON(irq_handler);
6197 return ata_host_register(host, sht);
6198 }
6199
Tejun Heof5cda252007-04-17 23:44:07 +09006200 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6201 dev_driver_string(host->dev), host);
6202 if (rc)
6203 return rc;
6204
Tejun Heocbcdd872007-08-18 13:14:55 +09006205 for (i = 0; i < host->n_ports; i++)
6206 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006207
Tejun Heof5cda252007-04-17 23:44:07 +09006208 rc = ata_host_register(host, sht);
6209 /* if failed, just free the IRQ and leave ports alone */
6210 if (rc)
6211 devm_free_irq(host->dev, irq, host);
6212
6213 return rc;
6214}
6215
6216/**
Tejun Heo720ba122006-05-31 18:28:13 +09006217 * ata_port_detach - Detach ATA port in prepration of device removal
6218 * @ap: ATA port to be detached
6219 *
6220 * Detach all ATA devices and the associated SCSI devices of @ap;
6221 * then, remove the associated SCSI host. @ap is guaranteed to
6222 * be quiescent on return from this function.
6223 *
6224 * LOCKING:
6225 * Kernel thread context (may sleep).
6226 */
Adrian Bunk741b7762007-10-24 18:23:06 +02006227static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09006228{
6229 unsigned long flags;
Tejun Heo720ba122006-05-31 18:28:13 +09006230
6231 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006232 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006233
6234 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006235 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006236 ap->pflags |= ATA_PFLAG_UNLOADING;
Tejun Heoece180d2008-11-03 20:04:37 +09006237 ata_port_schedule_eh(ap);
Jeff Garzikba6a1302006-06-22 23:46:10 -04006238 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006239
Tejun Heoece180d2008-11-03 20:04:37 +09006240 /* wait till EH commits suicide */
Tejun Heo720ba122006-05-31 18:28:13 +09006241 ata_port_wait_eh(ap);
6242
Tejun Heoece180d2008-11-03 20:04:37 +09006243 /* it better be dead now */
6244 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
Tejun Heo720ba122006-05-31 18:28:13 +09006245
Tejun Heoafe2c512010-12-14 16:21:17 +01006246 cancel_delayed_work_sync(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006247
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006248 skip_eh:
Gwendal Grignoud9027472010-05-25 12:31:38 -07006249 if (ap->pmp_link) {
6250 int i;
6251 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6252 ata_tlink_delete(&ap->pmp_link[i]);
6253 }
6254 ata_tport_delete(ap);
6255
Tejun Heo720ba122006-05-31 18:28:13 +09006256 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006257 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006258}
6259
6260/**
Tejun Heo0529c1592007-01-20 16:00:26 +09006261 * ata_host_detach - Detach all ports of an ATA host
6262 * @host: Host to detach
6263 *
6264 * Detach all ports of @host.
6265 *
6266 * LOCKING:
6267 * Kernel thread context (may sleep).
6268 */
6269void ata_host_detach(struct ata_host *host)
6270{
6271 int i;
6272
6273 for (i = 0; i < host->n_ports; i++)
6274 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006275
6276 /* the host is dead now, dissociate ACPI */
6277 ata_acpi_dissociate(host);
Tejun Heo0529c1592007-01-20 16:00:26 +09006278}
6279
Jeff Garzik374b1872005-08-30 05:42:52 -04006280#ifdef CONFIG_PCI
6281
Edward Falk0baab862005-06-02 18:17:13 -04006282/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006283 * ata_pci_remove_one - PCI layer callback for device removal
6284 * @pdev: PCI device that was removed
6285 *
Tejun Heob878ca52007-01-20 16:00:28 +09006286 * PCI layer indicates to libata via this hook that hot-unplug or
6287 * module unload event has occurred. Detach all ports. Resource
6288 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006289 *
6290 * LOCKING:
6291 * Inherited from PCI layer (may sleep).
6292 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006293void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006294{
Brian Norris04a3f5b2012-12-03 10:34:41 -08006295 struct ata_host *host = pci_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006296
Tejun Heob878ca52007-01-20 16:00:28 +09006297 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006298}
6299
6300/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006301int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006302{
6303 unsigned long tmp = 0;
6304
6305 switch (bits->width) {
6306 case 1: {
6307 u8 tmp8 = 0;
6308 pci_read_config_byte(pdev, bits->reg, &tmp8);
6309 tmp = tmp8;
6310 break;
6311 }
6312 case 2: {
6313 u16 tmp16 = 0;
6314 pci_read_config_word(pdev, bits->reg, &tmp16);
6315 tmp = tmp16;
6316 break;
6317 }
6318 case 4: {
6319 u32 tmp32 = 0;
6320 pci_read_config_dword(pdev, bits->reg, &tmp32);
6321 tmp = tmp32;
6322 break;
6323 }
6324
6325 default:
6326 return -EINVAL;
6327 }
6328
6329 tmp &= bits->mask;
6330
6331 return (tmp == bits->val) ? 1 : 0;
6332}
Jens Axboe9b847542006-01-06 09:28:07 +01006333
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006334#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006335void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006336{
6337 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006338 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006339
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006340 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006341 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006342}
6343
Tejun Heo553c4aa2006-12-26 19:39:50 +09006344int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006345{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006346 int rc;
6347
Jens Axboe9b847542006-01-06 09:28:07 +01006348 pci_set_power_state(pdev, PCI_D0);
6349 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006350
Tejun Heob878ca52007-01-20 16:00:28 +09006351 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006352 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -07006353 dev_err(&pdev->dev,
6354 "failed to enable device after resume (%d)\n", rc);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006355 return rc;
6356 }
6357
Jens Axboe9b847542006-01-06 09:28:07 +01006358 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006359 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006360}
6361
Tejun Heo3c5100c2006-07-26 16:58:33 +09006362int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006363{
Brian Norris04a3f5b2012-12-03 10:34:41 -08006364 struct ata_host *host = pci_get_drvdata(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006365 int rc = 0;
6366
Jeff Garzikcca39742006-08-24 03:19:22 -04006367 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006368 if (rc)
6369 return rc;
6370
Tejun Heo3c5100c2006-07-26 16:58:33 +09006371 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006372
6373 return 0;
6374}
6375
6376int ata_pci_device_resume(struct pci_dev *pdev)
6377{
Brian Norris04a3f5b2012-12-03 10:34:41 -08006378 struct ata_host *host = pci_get_drvdata(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006379 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006380
Tejun Heo553c4aa2006-12-26 19:39:50 +09006381 rc = ata_pci_device_do_resume(pdev);
6382 if (rc == 0)
6383 ata_host_resume(host);
6384 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006385}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006386#endif /* CONFIG_PM */
6387
Linus Torvalds1da177e2005-04-16 15:20:36 -07006388#endif /* CONFIG_PCI */
6389
Brian Norrisb7db04d2012-11-02 12:29:32 -07006390/**
6391 * ata_platform_remove_one - Platform layer callback for device removal
6392 * @pdev: Platform device that was removed
6393 *
6394 * Platform layer indicates to libata via this hook that hot-unplug or
6395 * module unload event has occurred. Detach all ports. Resource
6396 * release is handled via devres.
6397 *
6398 * LOCKING:
6399 * Inherited from platform layer (may sleep).
6400 */
6401int ata_platform_remove_one(struct platform_device *pdev)
6402{
6403 struct ata_host *host = platform_get_drvdata(pdev);
6404
6405 ata_host_detach(host);
6406
6407 return 0;
6408}
6409
Tejun Heo33267322008-02-13 09:15:09 +09006410static int __init ata_parse_force_one(char **cur,
6411 struct ata_force_ent *force_ent,
6412 const char **reason)
6413{
6414 /* FIXME: Currently, there's no way to tag init const data and
6415 * using __initdata causes build failure on some versions of
6416 * gcc. Once __initdataconst is implemented, add const to the
6417 * following structure.
6418 */
6419 static struct ata_force_param force_tbl[] __initdata = {
6420 { "40c", .cbl = ATA_CBL_PATA40 },
6421 { "80c", .cbl = ATA_CBL_PATA80 },
6422 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6423 { "unk", .cbl = ATA_CBL_PATA_UNK },
6424 { "ign", .cbl = ATA_CBL_PATA_IGN },
6425 { "sata", .cbl = ATA_CBL_SATA },
6426 { "1.5Gbps", .spd_limit = 1 },
6427 { "3.0Gbps", .spd_limit = 2 },
6428 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6429 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
Tejun Heo43c9c592010-05-23 12:59:11 +02006430 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
Tejun Heo33267322008-02-13 09:15:09 +09006431 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6432 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6433 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6434 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6435 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6436 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6437 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6438 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6439 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6440 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6441 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6442 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6443 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6444 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6445 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6446 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6447 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6448 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6449 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6450 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6451 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6452 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6453 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6454 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6455 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6456 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6457 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6458 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6459 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6460 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6461 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6462 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6463 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6464 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006465 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6466 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6467 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Dan Williamsca6d43b2012-06-21 23:41:41 -07006468 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
Tejun Heo33267322008-02-13 09:15:09 +09006469 };
6470 char *start = *cur, *p = *cur;
6471 char *id, *val, *endp;
6472 const struct ata_force_param *match_fp = NULL;
6473 int nr_matches = 0, i;
6474
6475 /* find where this param ends and update *cur */
6476 while (*p != '\0' && *p != ',')
6477 p++;
6478
6479 if (*p == '\0')
6480 *cur = p;
6481 else
6482 *cur = p + 1;
6483
6484 *p = '\0';
6485
6486 /* parse */
6487 p = strchr(start, ':');
6488 if (!p) {
6489 val = strstrip(start);
6490 goto parse_val;
6491 }
6492 *p = '\0';
6493
6494 id = strstrip(start);
6495 val = strstrip(p + 1);
6496
6497 /* parse id */
6498 p = strchr(id, '.');
6499 if (p) {
6500 *p++ = '\0';
6501 force_ent->device = simple_strtoul(p, &endp, 10);
6502 if (p == endp || *endp != '\0') {
6503 *reason = "invalid device";
6504 return -EINVAL;
6505 }
6506 }
6507
6508 force_ent->port = simple_strtoul(id, &endp, 10);
6509 if (p == endp || *endp != '\0') {
6510 *reason = "invalid port/link";
6511 return -EINVAL;
6512 }
6513
6514 parse_val:
6515 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6516 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6517 const struct ata_force_param *fp = &force_tbl[i];
6518
6519 if (strncasecmp(val, fp->name, strlen(val)))
6520 continue;
6521
6522 nr_matches++;
6523 match_fp = fp;
6524
6525 if (strcasecmp(val, fp->name) == 0) {
6526 nr_matches = 1;
6527 break;
6528 }
6529 }
6530
6531 if (!nr_matches) {
6532 *reason = "unknown value";
6533 return -EINVAL;
6534 }
6535 if (nr_matches > 1) {
6536 *reason = "ambigious value";
6537 return -EINVAL;
6538 }
6539
6540 force_ent->param = *match_fp;
6541
6542 return 0;
6543}
6544
6545static void __init ata_parse_force_param(void)
6546{
6547 int idx = 0, size = 1;
6548 int last_port = -1, last_device = -1;
6549 char *p, *cur, *next;
6550
6551 /* calculate maximum number of params and allocate force_tbl */
6552 for (p = ata_force_param_buf; *p; p++)
6553 if (*p == ',')
6554 size++;
6555
6556 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6557 if (!ata_force_tbl) {
6558 printk(KERN_WARNING "ata: failed to extend force table, "
6559 "libata.force ignored\n");
6560 return;
6561 }
6562
6563 /* parse and populate the table */
6564 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6565 const char *reason = "";
6566 struct ata_force_ent te = { .port = -1, .device = -1 };
6567
6568 next = cur;
6569 if (ata_parse_force_one(&next, &te, &reason)) {
6570 printk(KERN_WARNING "ata: failed to parse force "
6571 "parameter \"%s\" (%s)\n",
6572 cur, reason);
6573 continue;
6574 }
6575
6576 if (te.port == -1) {
6577 te.port = last_port;
6578 te.device = last_device;
6579 }
6580
6581 ata_force_tbl[idx++] = te;
6582
6583 last_port = te.port;
6584 last_device = te.device;
6585 }
6586
6587 ata_force_tbl_size = idx;
6588}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006589
Linus Torvalds1da177e2005-04-16 15:20:36 -07006590static int __init ata_init(void)
6591{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006592 int rc;
Tejun Heo270390e2010-05-10 21:41:35 +02006593
Tejun Heo33267322008-02-13 09:15:09 +09006594 ata_parse_force_param();
6595
Matthew Garrett6b66d952012-06-25 16:13:03 +08006596 ata_acpi_register();
6597
Tejun Heo270390e2010-05-10 21:41:35 +02006598 rc = ata_sff_init();
Tejun Heoad72cf92010-07-02 10:03:52 +02006599 if (rc) {
6600 kfree(ata_force_tbl);
6601 return rc;
6602 }
Tejun Heo453b07a2006-05-31 18:27:42 +09006603
Gwendal Grignoud9027472010-05-25 12:31:38 -07006604 libata_transport_init();
6605 ata_scsi_transport_template = ata_attach_transport();
6606 if (!ata_scsi_transport_template) {
6607 ata_sff_exit();
6608 rc = -ENOMEM;
6609 goto err_out;
Jeff Garzik4fca3772011-02-15 01:13:24 -05006610 }
Gwendal Grignoud9027472010-05-25 12:31:38 -07006611
Linus Torvalds1da177e2005-04-16 15:20:36 -07006612 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6613 return 0;
Gwendal Grignoud9027472010-05-25 12:31:38 -07006614
6615err_out:
6616 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006617}
6618
6619static void __exit ata_exit(void)
6620{
Gwendal Grignoud9027472010-05-25 12:31:38 -07006621 ata_release_transport(ata_scsi_transport_template);
6622 libata_transport_exit();
Tejun Heo270390e2010-05-10 21:41:35 +02006623 ata_sff_exit();
Matthew Garrett6b66d952012-06-25 16:13:03 +08006624 ata_acpi_unregister();
Tejun Heo33267322008-02-13 09:15:09 +09006625 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006626}
6627
Brian Kinga4625082006-11-13 16:32:36 -06006628subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006629module_exit(ata_exit);
6630
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006631static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
Jeff Garzik67846b32005-10-05 02:58:32 -04006632
6633int ata_ratelimit(void)
6634{
Akinobu Mita9990b6f2010-04-12 21:11:41 +09006635 return __ratelimit(&ratelimit);
Jeff Garzik67846b32005-10-05 02:58:32 -04006636}
6637
Tejun Heoc0c362b2010-09-06 17:57:14 +02006638/**
6639 * ata_msleep - ATA EH owner aware msleep
6640 * @ap: ATA port to attribute the sleep to
6641 * @msecs: duration to sleep in milliseconds
6642 *
6643 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6644 * ownership is released before going to sleep and reacquired
6645 * after the sleep is complete. IOW, other ports sharing the
6646 * @ap->host will be allowed to own the EH while this task is
6647 * sleeping.
6648 *
6649 * LOCKING:
6650 * Might sleep.
6651 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006652void ata_msleep(struct ata_port *ap, unsigned int msecs)
6653{
Tejun Heoc0c362b2010-09-06 17:57:14 +02006654 bool owns_eh = ap && ap->host->eh_owner == current;
6655
6656 if (owns_eh)
6657 ata_eh_release(ap);
6658
Tejun Heo97750ce2010-09-06 17:56:29 +02006659 msleep(msecs);
Tejun Heoc0c362b2010-09-06 17:57:14 +02006660
6661 if (owns_eh)
6662 ata_eh_acquire(ap);
Tejun Heo97750ce2010-09-06 17:56:29 +02006663}
6664
Tejun Heoc22daff2006-04-11 22:22:29 +09006665/**
6666 * ata_wait_register - wait until register value changes
Tejun Heo97750ce2010-09-06 17:56:29 +02006667 * @ap: ATA port to wait register for, can be NULL
Tejun Heoc22daff2006-04-11 22:22:29 +09006668 * @reg: IO-mapped register
6669 * @mask: Mask to apply to read register value
6670 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006671 * @interval: polling interval in milliseconds
6672 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006673 *
6674 * Waiting for some bits of register to change is a common
6675 * operation for ATA controllers. This function reads 32bit LE
6676 * IO-mapped register @reg and tests for the following condition.
6677 *
6678 * (*@reg & mask) != val
6679 *
6680 * If the condition is met, it returns; otherwise, the process is
6681 * repeated after @interval_msec until timeout.
6682 *
6683 * LOCKING:
6684 * Kernel thread context (may sleep)
6685 *
6686 * RETURNS:
6687 * The final register value.
6688 */
Tejun Heo97750ce2010-09-06 17:56:29 +02006689u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006690 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006691{
Tejun Heo341c2c92008-05-20 02:17:51 +09006692 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006693 u32 tmp;
6694
6695 tmp = ioread32(reg);
6696
6697 /* Calculate timeout _after_ the first read to make sure
6698 * preceding writes reach the controller before starting to
6699 * eat away the timeout.
6700 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006701 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006702
Tejun Heo341c2c92008-05-20 02:17:51 +09006703 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
Tejun Heo97750ce2010-09-06 17:56:29 +02006704 ata_msleep(ap, interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006705 tmp = ioread32(reg);
6706 }
6707
6708 return tmp;
6709}
6710
Linus Torvalds1da177e2005-04-16 15:20:36 -07006711/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006712 * Dummy port_ops
6713 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006714static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6715{
6716 return AC_ERR_SYSTEM;
6717}
6718
Tejun Heo182d7bb2008-04-07 22:47:21 +09006719static void ata_dummy_error_handler(struct ata_port *ap)
6720{
6721 /* truly dummy */
6722}
6723
Tejun Heo029cfd62008-03-25 12:22:49 +09006724struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006725 .qc_prep = ata_noop_qc_prep,
6726 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006727 .error_handler = ata_dummy_error_handler,
Dan Williamse4a9c372012-06-21 23:25:27 -07006728 .sched_eh = ata_std_sched_eh,
6729 .end_eh = ata_std_end_eh,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006730};
6731
Tejun Heo21b0ad42007-04-17 23:44:07 +09006732const struct ata_port_info ata_dummy_port_info = {
6733 .port_ops = &ata_dummy_port_ops,
6734};
6735
Tejun Heodd5b06c2006-08-10 16:59:12 +09006736/*
Joe Perchesa9a79df2011-04-15 15:51:59 -07006737 * Utility print functions
6738 */
6739int ata_port_printk(const struct ata_port *ap, const char *level,
6740 const char *fmt, ...)
6741{
6742 struct va_format vaf;
6743 va_list args;
6744 int r;
6745
6746 va_start(args, fmt);
6747
6748 vaf.fmt = fmt;
6749 vaf.va = &args;
6750
6751 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6752
6753 va_end(args);
6754
6755 return r;
6756}
6757EXPORT_SYMBOL(ata_port_printk);
6758
6759int ata_link_printk(const struct ata_link *link, const char *level,
6760 const char *fmt, ...)
6761{
6762 struct va_format vaf;
6763 va_list args;
6764 int r;
6765
6766 va_start(args, fmt);
6767
6768 vaf.fmt = fmt;
6769 vaf.va = &args;
6770
6771 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6772 r = printk("%sata%u.%02u: %pV",
6773 level, link->ap->print_id, link->pmp, &vaf);
6774 else
6775 r = printk("%sata%u: %pV",
6776 level, link->ap->print_id, &vaf);
6777
6778 va_end(args);
6779
6780 return r;
6781}
6782EXPORT_SYMBOL(ata_link_printk);
6783
6784int ata_dev_printk(const struct ata_device *dev, const char *level,
6785 const char *fmt, ...)
6786{
6787 struct va_format vaf;
6788 va_list args;
6789 int r;
6790
6791 va_start(args, fmt);
6792
6793 vaf.fmt = fmt;
6794 vaf.va = &args;
6795
6796 r = printk("%sata%u.%02u: %pV",
6797 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6798 &vaf);
6799
6800 va_end(args);
6801
6802 return r;
6803}
6804EXPORT_SYMBOL(ata_dev_printk);
6805
Joe Perches06296a12011-04-15 15:52:00 -07006806void ata_print_version(const struct device *dev, const char *version)
6807{
6808 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6809}
6810EXPORT_SYMBOL(ata_print_version);
6811
Joe Perchesa9a79df2011-04-15 15:51:59 -07006812/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006813 * libata is essentially a library of internal helper functions for
6814 * low-level ATA host controller drivers. As such, the API/ABI is
6815 * likely to change as new drivers are added and updated.
6816 * Do not depend on ABI/API stability.
6817 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006818EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6819EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6820EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006821EXPORT_SYMBOL_GPL(ata_base_port_ops);
6822EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006823EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006824EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heo1eca4362008-11-03 20:03:17 +09006825EXPORT_SYMBOL_GPL(ata_link_next);
6826EXPORT_SYMBOL_GPL(ata_dev_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006827EXPORT_SYMBOL_GPL(ata_std_bios_param);
Tejun Heod8d91292010-05-15 20:09:34 +02006828EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
Jeff Garzikcca39742006-08-24 03:19:22 -04006829EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006830EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006831EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006832EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006833EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006834EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006835EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c1592007-01-20 16:00:26 +09006836EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006837EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006838EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006839EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006840EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006841EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6842EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006843EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6844EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6845EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6846EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6847EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6848EXPORT_SYMBOL_GPL(ata_mode_string);
6849EXPORT_SYMBOL_GPL(ata_id_xfermask);
Alan04351822007-03-06 02:37:52 -08006850EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006851EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006852EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Alan10305f02007-02-20 18:01:59 +00006853EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006854EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006855EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006856EXPORT_SYMBOL_GPL(sata_link_debounce);
6857EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo1152b262010-09-01 17:50:05 +02006858EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
Tejun Heo0aa11132008-04-07 22:47:18 +09006859EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006860EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006861EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006862EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006863EXPORT_SYMBOL_GPL(ata_dev_classify);
6864EXPORT_SYMBOL_GPL(ata_dev_pair);
Jeff Garzik67846b32005-10-05 02:58:32 -04006865EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heo97750ce2010-09-06 17:56:29 +02006866EXPORT_SYMBOL_GPL(ata_msleep);
Tejun Heoc22daff2006-04-11 22:22:29 +09006867EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006868EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006869EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006870EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006871EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Dan Williamsf6e67032011-09-20 15:10:33 -07006872EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006873EXPORT_SYMBOL_GPL(sata_scr_valid);
6874EXPORT_SYMBOL_GPL(sata_scr_read);
6875EXPORT_SYMBOL_GPL(sata_scr_write);
6876EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006877EXPORT_SYMBOL_GPL(ata_link_online);
6878EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006879#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006880EXPORT_SYMBOL_GPL(ata_host_suspend);
6881EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006882#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006883EXPORT_SYMBOL_GPL(ata_id_string);
6884EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006885EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006886EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6887
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006888EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006889EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006890EXPORT_SYMBOL_GPL(ata_timing_compute);
6891EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006892EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006893
Linus Torvalds1da177e2005-04-16 15:20:36 -07006894#ifdef CONFIG_PCI
6895EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006896EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006897#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006898EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6899EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006900EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6901EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006902#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006903#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006904
Brian Norrisb7db04d2012-11-02 12:29:32 -07006905EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6906
Tejun Heob64bbc32007-07-16 14:29:39 +09006907EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6908EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6909EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09006910EXPORT_SYMBOL_GPL(ata_port_desc);
6911#ifdef CONFIG_PCI
6912EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6913#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09006914EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09006915EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006916EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006917EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09006918EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09006919EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6920EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006921EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6922EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04006923EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09006924EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09006925EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006926
6927EXPORT_SYMBOL_GPL(ata_cable_40wire);
6928EXPORT_SYMBOL_GPL(ata_cable_80wire);
6929EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09006930EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006931EXPORT_SYMBOL_GPL(ata_cable_sata);