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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Alan Cox92c52c52007-11-19 14:30:16 +000033 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
40 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/kernel.h>
44#include <linux/module.h>
45#include <linux/pci.h>
46#include <linux/init.h>
47#include <linux/list.h>
48#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/spinlock.h>
50#include <linux/blkdev.h>
51#include <linux/delay.h>
52#include <linux/timer.h>
53#include <linux/interrupt.h>
54#include <linux/completion.h>
55#include <linux/suspend.h>
56#include <linux/workqueue.h>
David Hardeman378f0582005-09-17 17:55:31 +100057#include <linux/scatterlist.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040058#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050060#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <scsi/scsi_host.h>
62#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <asm/byteorder.h>
Tejun Heo140b5e52007-12-12 12:21:52 +090064#include <linux/cdrom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66#include "libata.h"
67
Jeff Garzikfda0efc2007-01-31 07:43:15 -050068
Tejun Heod7bb4cc2006-05-31 18:27:46 +090069/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090070const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
71const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
72const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090073
Tejun Heo029cfd62008-03-25 12:22:49 +090074const struct ata_port_operations ata_base_port_ops = {
Tejun Heo0aa11132008-04-07 22:47:18 +090075 .prereset = ata_std_prereset,
Tejun Heo203c75b2008-04-07 22:47:18 +090076 .postreset = ata_std_postreset,
Tejun Heoa1efdab2008-03-25 12:22:50 +090077 .error_handler = ata_std_error_handler,
Tejun Heo029cfd62008-03-25 12:22:49 +090078};
79
80const struct ata_port_operations sata_port_ops = {
81 .inherits = &ata_base_port_ops,
82
83 .qc_defer = ata_std_qc_defer,
Tejun Heo57c9efd2008-04-07 22:47:19 +090084 .hardreset = sata_std_hardreset,
Tejun Heo029cfd62008-03-25 12:22:49 +090085};
86
Tejun Heo3373efd2006-05-15 20:57:53 +090087static unsigned int ata_dev_init_params(struct ata_device *dev,
88 u16 heads, u16 sectors);
89static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
Jeff Garzik218f3d32007-10-25 00:33:27 -040090static unsigned int ata_dev_set_feature(struct ata_device *dev,
91 u8 enable, u8 feature);
Tejun Heo3373efd2006-05-15 20:57:53 +090092static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090093static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Tejun Heof3187192007-04-17 23:44:07 +090095unsigned int ata_print_id = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096static struct workqueue_struct *ata_wq;
97
Tejun Heo453b07a2006-05-31 18:27:42 +090098struct workqueue_struct *ata_aux_wq;
99
Tejun Heo33267322008-02-13 09:15:09 +0900100struct ata_force_param {
101 const char *name;
102 unsigned int cbl;
103 int spd_limit;
104 unsigned long xfer_mask;
105 unsigned int horkage_on;
106 unsigned int horkage_off;
Tejun Heo05944bd2008-08-13 20:19:09 +0900107 unsigned int lflags;
Tejun Heo33267322008-02-13 09:15:09 +0900108};
109
110struct ata_force_ent {
111 int port;
112 int device;
113 struct ata_force_param param;
114};
115
116static struct ata_force_ent *ata_force_tbl;
117static int ata_force_tbl_size;
118
119static char ata_force_param_buf[PAGE_SIZE] __initdata;
Tejun Heo7afb4222008-03-09 20:21:53 +0900120/* param_buf is thrown away after initialization, disallow read */
121module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
Tejun Heo33267322008-02-13 09:15:09 +0900122MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
123
Tejun Heo2486fa52008-07-31 07:52:40 +0900124static int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -0400125module_param(atapi_enabled, int, 0444);
126MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
127
Adrian Bunkc5c61bd2008-02-25 02:07:25 +0200128static int atapi_dmadir = 0;
Albert Lee95de7192006-04-04 10:57:18 +0800129module_param(atapi_dmadir, int, 0444);
130MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
131
Mark Lordbaf4fdf2007-08-08 01:08:45 +0900132int atapi_passthru16 = 1;
133module_param(atapi_passthru16, int, 0444);
134MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
135
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500136int libata_fua = 0;
137module_param_named(fua, libata_fua, int, 0444);
138MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
139
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400140static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100141module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
142MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
143
Alan Coxb3a70602007-10-02 12:38:26 -0400144static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
145module_param_named(dma, libata_dma_mask, int, 0444);
146MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
147
Tejun Heo87fbc5a2008-05-20 02:17:54 +0900148static int ata_probe_timeout;
Andrew Mortona8601e52006-06-25 01:36:52 -0700149module_param(ata_probe_timeout, int, 0444);
150MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
151
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400152int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400153module_param_named(noacpi, libata_noacpi, int, 0444);
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400154MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700155
Alan Coxae8d4ee2007-11-04 22:05:49 -0500156int libata_allow_tpm = 0;
157module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
158MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160MODULE_AUTHOR("Jeff Garzik");
161MODULE_DESCRIPTION("Library module for ATA devices");
162MODULE_LICENSE("GPL");
163MODULE_VERSION(DRV_VERSION);
164
Edward Falk0baab862005-06-02 18:17:13 -0400165
Tejun Heoaadffb62008-07-31 17:02:41 +0900166/*
167 * Iterator helpers. Don't use directly.
168 *
169 * LOCKING:
170 * Host lock or EH context.
171 */
172struct ata_link *__ata_port_next_link(struct ata_port *ap,
173 struct ata_link *link, bool dev_only)
174{
175 /* NULL link indicates start of iteration */
176 if (!link) {
177 if (dev_only && sata_pmp_attached(ap))
178 return ap->pmp_link;
179 return &ap->link;
180 }
181
Tejun Heob1c72912008-07-31 17:02:43 +0900182 /* we just iterated over the host master link, what's next? */
183 if (link == &ap->link) {
184 if (!sata_pmp_attached(ap)) {
185 if (unlikely(ap->slave_link) && !dev_only)
186 return ap->slave_link;
Tejun Heoaadffb62008-07-31 17:02:41 +0900187 return NULL;
Tejun Heob1c72912008-07-31 17:02:43 +0900188 }
Tejun Heoaadffb62008-07-31 17:02:41 +0900189 return ap->pmp_link;
190 }
191
Tejun Heob1c72912008-07-31 17:02:43 +0900192 /* slave_link excludes PMP */
193 if (unlikely(link == ap->slave_link))
194 return NULL;
195
Tejun Heoaadffb62008-07-31 17:02:41 +0900196 /* iterate to the next PMP link */
197 if (++link < ap->pmp_link + ap->nr_pmp_links)
198 return link;
199 return NULL;
200}
201
Edward Falk0baab862005-06-02 18:17:13 -0400202/**
Tejun Heob1c72912008-07-31 17:02:43 +0900203 * ata_dev_phys_link - find physical link for a device
204 * @dev: ATA device to look up physical link for
205 *
206 * Look up physical link which @dev is attached to. Note that
207 * this is different from @dev->link only when @dev is on slave
208 * link. For all other cases, it's the same as @dev->link.
209 *
210 * LOCKING:
211 * Don't care.
212 *
213 * RETURNS:
214 * Pointer to the found physical link.
215 */
216struct ata_link *ata_dev_phys_link(struct ata_device *dev)
217{
218 struct ata_port *ap = dev->link->ap;
219
220 if (!ap->slave_link)
221 return dev->link;
222 if (!dev->devno)
223 return &ap->link;
224 return ap->slave_link;
225}
226
227/**
Tejun Heo33267322008-02-13 09:15:09 +0900228 * ata_force_cbl - force cable type according to libata.force
Randy Dunlap4cdfa1b2008-02-22 12:21:37 -0800229 * @ap: ATA port of interest
Tejun Heo33267322008-02-13 09:15:09 +0900230 *
231 * Force cable type according to libata.force and whine about it.
232 * The last entry which has matching port number is used, so it
233 * can be specified as part of device force parameters. For
234 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
235 * same effect.
236 *
237 * LOCKING:
238 * EH context.
239 */
240void ata_force_cbl(struct ata_port *ap)
241{
242 int i;
243
244 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
245 const struct ata_force_ent *fe = &ata_force_tbl[i];
246
247 if (fe->port != -1 && fe->port != ap->print_id)
248 continue;
249
250 if (fe->param.cbl == ATA_CBL_NONE)
251 continue;
252
253 ap->cbl = fe->param.cbl;
254 ata_port_printk(ap, KERN_NOTICE,
255 "FORCE: cable set to %s\n", fe->param.name);
256 return;
257 }
258}
259
260/**
Tejun Heo05944bd2008-08-13 20:19:09 +0900261 * ata_force_link_limits - force link limits according to libata.force
Tejun Heo33267322008-02-13 09:15:09 +0900262 * @link: ATA link of interest
263 *
Tejun Heo05944bd2008-08-13 20:19:09 +0900264 * Force link flags and SATA spd limit according to libata.force
265 * and whine about it. When only the port part is specified
266 * (e.g. 1:), the limit applies to all links connected to both
267 * the host link and all fan-out ports connected via PMP. If the
268 * device part is specified as 0 (e.g. 1.00:), it specifies the
269 * first fan-out link not the host link. Device number 15 always
Tejun Heob1c72912008-07-31 17:02:43 +0900270 * points to the host link whether PMP is attached or not. If the
271 * controller has slave link, device number 16 points to it.
Tejun Heo33267322008-02-13 09:15:09 +0900272 *
273 * LOCKING:
274 * EH context.
275 */
Tejun Heo05944bd2008-08-13 20:19:09 +0900276static void ata_force_link_limits(struct ata_link *link)
Tejun Heo33267322008-02-13 09:15:09 +0900277{
Tejun Heo05944bd2008-08-13 20:19:09 +0900278 bool did_spd = false;
Tejun Heob1c72912008-07-31 17:02:43 +0900279 int linkno = link->pmp;
280 int i;
Tejun Heo33267322008-02-13 09:15:09 +0900281
282 if (ata_is_host_link(link))
Tejun Heob1c72912008-07-31 17:02:43 +0900283 linkno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900284
285 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
286 const struct ata_force_ent *fe = &ata_force_tbl[i];
287
288 if (fe->port != -1 && fe->port != link->ap->print_id)
289 continue;
290
291 if (fe->device != -1 && fe->device != linkno)
292 continue;
293
Tejun Heo05944bd2008-08-13 20:19:09 +0900294 /* only honor the first spd limit */
295 if (!did_spd && fe->param.spd_limit) {
296 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
297 ata_link_printk(link, KERN_NOTICE,
298 "FORCE: PHY spd limit set to %s\n",
299 fe->param.name);
300 did_spd = true;
301 }
Tejun Heo33267322008-02-13 09:15:09 +0900302
Tejun Heo05944bd2008-08-13 20:19:09 +0900303 /* let lflags stack */
304 if (fe->param.lflags) {
305 link->flags |= fe->param.lflags;
306 ata_link_printk(link, KERN_NOTICE,
307 "FORCE: link flag 0x%x forced -> 0x%x\n",
308 fe->param.lflags, link->flags);
309 }
Tejun Heo33267322008-02-13 09:15:09 +0900310 }
311}
312
313/**
314 * ata_force_xfermask - force xfermask according to libata.force
315 * @dev: ATA device of interest
316 *
317 * Force xfer_mask according to libata.force and whine about it.
318 * For consistency with link selection, device number 15 selects
319 * the first device connected to the host link.
320 *
321 * LOCKING:
322 * EH context.
323 */
324static void ata_force_xfermask(struct ata_device *dev)
325{
326 int devno = dev->link->pmp + dev->devno;
327 int alt_devno = devno;
328 int i;
329
Tejun Heob1c72912008-07-31 17:02:43 +0900330 /* allow n.15/16 for devices attached to host port */
331 if (ata_is_host_link(dev->link))
332 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900333
334 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
335 const struct ata_force_ent *fe = &ata_force_tbl[i];
336 unsigned long pio_mask, mwdma_mask, udma_mask;
337
338 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
339 continue;
340
341 if (fe->device != -1 && fe->device != devno &&
342 fe->device != alt_devno)
343 continue;
344
345 if (!fe->param.xfer_mask)
346 continue;
347
348 ata_unpack_xfermask(fe->param.xfer_mask,
349 &pio_mask, &mwdma_mask, &udma_mask);
350 if (udma_mask)
351 dev->udma_mask = udma_mask;
352 else if (mwdma_mask) {
353 dev->udma_mask = 0;
354 dev->mwdma_mask = mwdma_mask;
355 } else {
356 dev->udma_mask = 0;
357 dev->mwdma_mask = 0;
358 dev->pio_mask = pio_mask;
359 }
360
361 ata_dev_printk(dev, KERN_NOTICE,
362 "FORCE: xfer_mask set to %s\n", fe->param.name);
363 return;
364 }
365}
366
367/**
368 * ata_force_horkage - force horkage according to libata.force
369 * @dev: ATA device of interest
370 *
371 * Force horkage according to libata.force and whine about it.
372 * For consistency with link selection, device number 15 selects
373 * the first device connected to the host link.
374 *
375 * LOCKING:
376 * EH context.
377 */
378static void ata_force_horkage(struct ata_device *dev)
379{
380 int devno = dev->link->pmp + dev->devno;
381 int alt_devno = devno;
382 int i;
383
Tejun Heob1c72912008-07-31 17:02:43 +0900384 /* allow n.15/16 for devices attached to host port */
385 if (ata_is_host_link(dev->link))
386 alt_devno += 15;
Tejun Heo33267322008-02-13 09:15:09 +0900387
388 for (i = 0; i < ata_force_tbl_size; i++) {
389 const struct ata_force_ent *fe = &ata_force_tbl[i];
390
391 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
392 continue;
393
394 if (fe->device != -1 && fe->device != devno &&
395 fe->device != alt_devno)
396 continue;
397
398 if (!(~dev->horkage & fe->param.horkage_on) &&
399 !(dev->horkage & fe->param.horkage_off))
400 continue;
401
402 dev->horkage |= fe->param.horkage_on;
403 dev->horkage &= ~fe->param.horkage_off;
404
405 ata_dev_printk(dev, KERN_NOTICE,
406 "FORCE: horkage modified (%s)\n", fe->param.name);
407 }
408}
409
410/**
Tejun Heo436d34b2008-04-02 17:28:46 +0900411 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
412 * @opcode: SCSI opcode
413 *
414 * Determine ATAPI command type from @opcode.
415 *
416 * LOCKING:
417 * None.
418 *
419 * RETURNS:
420 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
421 */
422int atapi_cmd_type(u8 opcode)
423{
424 switch (opcode) {
425 case GPCMD_READ_10:
426 case GPCMD_READ_12:
427 return ATAPI_READ;
428
429 case GPCMD_WRITE_10:
430 case GPCMD_WRITE_12:
431 case GPCMD_WRITE_AND_VERIFY_10:
432 return ATAPI_WRITE;
433
434 case GPCMD_READ_CD:
435 case GPCMD_READ_CD_MSF:
436 return ATAPI_READ_CD;
437
Tejun Heoe52dcc42008-04-02 17:35:19 +0900438 case ATA_16:
439 case ATA_12:
440 if (atapi_passthru16)
441 return ATAPI_PASS_THRU;
442 /* fall thru */
Tejun Heo436d34b2008-04-02 17:28:46 +0900443 default:
444 return ATAPI_MISC;
445 }
446}
447
448/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
450 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900452 * @is_cmd: This FIS is for command
453 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 *
455 * Converts a standard ATA taskfile to a Serial ATA
456 * FIS structure (Register - Host to Device).
457 *
458 * LOCKING:
459 * Inherited from caller.
460 */
Tejun Heo99771262007-07-16 14:29:38 +0900461void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
Tejun Heo99771262007-07-16 14:29:38 +0900463 fis[0] = 0x27; /* Register - Host to Device FIS */
464 fis[1] = pmp & 0xf; /* Port multiplier number*/
465 if (is_cmd)
466 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 fis[2] = tf->command;
469 fis[3] = tf->feature;
470
471 fis[4] = tf->lbal;
472 fis[5] = tf->lbam;
473 fis[6] = tf->lbah;
474 fis[7] = tf->device;
475
476 fis[8] = tf->hob_lbal;
477 fis[9] = tf->hob_lbam;
478 fis[10] = tf->hob_lbah;
479 fis[11] = tf->hob_feature;
480
481 fis[12] = tf->nsect;
482 fis[13] = tf->hob_nsect;
483 fis[14] = 0;
484 fis[15] = tf->ctl;
485
486 fis[16] = 0;
487 fis[17] = 0;
488 fis[18] = 0;
489 fis[19] = 0;
490}
491
492/**
493 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
494 * @fis: Buffer from which data will be input
495 * @tf: Taskfile to output
496 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500497 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 *
499 * LOCKING:
500 * Inherited from caller.
501 */
502
Jeff Garzik057ace52005-10-22 14:27:05 -0400503void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504{
505 tf->command = fis[2]; /* status */
506 tf->feature = fis[3]; /* error */
507
508 tf->lbal = fis[4];
509 tf->lbam = fis[5];
510 tf->lbah = fis[6];
511 tf->device = fis[7];
512
513 tf->hob_lbal = fis[8];
514 tf->hob_lbam = fis[9];
515 tf->hob_lbah = fis[10];
516
517 tf->nsect = fis[12];
518 tf->hob_nsect = fis[13];
519}
520
Albert Lee8cbd6df2005-10-12 15:06:27 +0800521static const u8 ata_rw_cmds[] = {
522 /* pio multi */
523 ATA_CMD_READ_MULTI,
524 ATA_CMD_WRITE_MULTI,
525 ATA_CMD_READ_MULTI_EXT,
526 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100527 0,
528 0,
529 0,
530 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800531 /* pio */
532 ATA_CMD_PIO_READ,
533 ATA_CMD_PIO_WRITE,
534 ATA_CMD_PIO_READ_EXT,
535 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100536 0,
537 0,
538 0,
539 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800540 /* dma */
541 ATA_CMD_READ,
542 ATA_CMD_WRITE,
543 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100544 ATA_CMD_WRITE_EXT,
545 0,
546 0,
547 0,
548 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800549};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
551/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800552 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900553 * @tf: command to examine and configure
554 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500556 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800557 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 *
559 * LOCKING:
560 * caller.
561 */
Tejun Heobd056d72006-11-14 22:47:10 +0900562static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100564 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100566 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500567
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100568 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800569 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
570 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
Albert Lee8cbd6df2005-10-12 15:06:27 +0800572 if (dev->flags & ATA_DFLAG_PIO) {
573 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100574 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900575 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000576 /* Unable to use DMA due to host limitation */
577 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800578 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800579 } else {
580 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100581 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800582 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100584 cmd = ata_rw_cmds[index + fua + lba48 + write];
585 if (cmd) {
586 tf->command = cmd;
587 return 0;
588 }
589 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590}
591
Tejun Heocb95d562006-03-06 04:31:56 +0900592/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900593 * ata_tf_read_block - Read block address from ATA taskfile
594 * @tf: ATA taskfile of interest
595 * @dev: ATA device @tf belongs to
596 *
597 * LOCKING:
598 * None.
599 *
600 * Read block address from @tf. This function can handle all
601 * three address formats - LBA, LBA48 and CHS. tf->protocol and
602 * flags select the address format to use.
603 *
604 * RETURNS:
605 * Block address read from @tf.
606 */
607u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
608{
609 u64 block = 0;
610
611 if (tf->flags & ATA_TFLAG_LBA) {
612 if (tf->flags & ATA_TFLAG_LBA48) {
613 block |= (u64)tf->hob_lbah << 40;
614 block |= (u64)tf->hob_lbam << 32;
Roland Dreier44901a92008-11-04 10:34:48 -0800615 block |= (u64)tf->hob_lbal << 24;
Tejun Heo35b649f2006-11-14 22:37:35 +0900616 } else
617 block |= (tf->device & 0xf) << 24;
618
619 block |= tf->lbah << 16;
620 block |= tf->lbam << 8;
621 block |= tf->lbal;
622 } else {
623 u32 cyl, head, sect;
624
625 cyl = tf->lbam | (tf->lbah << 8);
626 head = tf->device & 0xf;
627 sect = tf->lbal;
628
629 block = (cyl * dev->heads + head) * dev->sectors + sect;
630 }
631
632 return block;
633}
634
635/**
Tejun Heobd056d72006-11-14 22:47:10 +0900636 * ata_build_rw_tf - Build ATA taskfile for given read/write request
637 * @tf: Target ATA taskfile
638 * @dev: ATA device @tf belongs to
639 * @block: Block address
640 * @n_block: Number of blocks
641 * @tf_flags: RW/FUA etc...
642 * @tag: tag
643 *
644 * LOCKING:
645 * None.
646 *
647 * Build ATA taskfile @tf for read/write request described by
648 * @block, @n_block, @tf_flags and @tag on @dev.
649 *
650 * RETURNS:
651 *
652 * 0 on success, -ERANGE if the request is too large for @dev,
653 * -EINVAL if the request is invalid.
654 */
655int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
656 u64 block, u32 n_block, unsigned int tf_flags,
657 unsigned int tag)
658{
659 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
660 tf->flags |= tf_flags;
661
Tejun Heo6d1245b2007-02-20 23:20:27 +0900662 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900663 /* yay, NCQ */
664 if (!lba_48_ok(block, n_block))
665 return -ERANGE;
666
667 tf->protocol = ATA_PROT_NCQ;
668 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
669
670 if (tf->flags & ATA_TFLAG_WRITE)
671 tf->command = ATA_CMD_FPDMA_WRITE;
672 else
673 tf->command = ATA_CMD_FPDMA_READ;
674
675 tf->nsect = tag << 3;
676 tf->hob_feature = (n_block >> 8) & 0xff;
677 tf->feature = n_block & 0xff;
678
679 tf->hob_lbah = (block >> 40) & 0xff;
680 tf->hob_lbam = (block >> 32) & 0xff;
681 tf->hob_lbal = (block >> 24) & 0xff;
682 tf->lbah = (block >> 16) & 0xff;
683 tf->lbam = (block >> 8) & 0xff;
684 tf->lbal = block & 0xff;
685
686 tf->device = 1 << 6;
687 if (tf->flags & ATA_TFLAG_FUA)
688 tf->device |= 1 << 7;
689 } else if (dev->flags & ATA_DFLAG_LBA) {
690 tf->flags |= ATA_TFLAG_LBA;
691
692 if (lba_28_ok(block, n_block)) {
693 /* use LBA28 */
694 tf->device |= (block >> 24) & 0xf;
695 } else if (lba_48_ok(block, n_block)) {
696 if (!(dev->flags & ATA_DFLAG_LBA48))
697 return -ERANGE;
698
699 /* use LBA48 */
700 tf->flags |= ATA_TFLAG_LBA48;
701
702 tf->hob_nsect = (n_block >> 8) & 0xff;
703
704 tf->hob_lbah = (block >> 40) & 0xff;
705 tf->hob_lbam = (block >> 32) & 0xff;
706 tf->hob_lbal = (block >> 24) & 0xff;
707 } else
708 /* request too large even for LBA48 */
709 return -ERANGE;
710
711 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
712 return -EINVAL;
713
714 tf->nsect = n_block & 0xff;
715
716 tf->lbah = (block >> 16) & 0xff;
717 tf->lbam = (block >> 8) & 0xff;
718 tf->lbal = block & 0xff;
719
720 tf->device |= ATA_LBA;
721 } else {
722 /* CHS */
723 u32 sect, head, cyl, track;
724
725 /* The request -may- be too large for CHS addressing. */
726 if (!lba_28_ok(block, n_block))
727 return -ERANGE;
728
729 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
730 return -EINVAL;
731
732 /* Convert LBA to CHS */
733 track = (u32)block / dev->sectors;
734 cyl = track / dev->heads;
735 head = track % dev->heads;
736 sect = (u32)block % dev->sectors + 1;
737
738 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
739 (u32)block, track, cyl, head, sect);
740
741 /* Check whether the converted CHS can fit.
742 Cylinder: 0-65535
743 Head: 0-15
744 Sector: 1-255*/
745 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
746 return -ERANGE;
747
748 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
749 tf->lbal = sect;
750 tf->lbam = cyl;
751 tf->lbah = cyl >> 8;
752 tf->device |= head;
753 }
754
755 return 0;
756}
757
758/**
Tejun Heocb95d562006-03-06 04:31:56 +0900759 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
760 * @pio_mask: pio_mask
761 * @mwdma_mask: mwdma_mask
762 * @udma_mask: udma_mask
763 *
764 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
765 * unsigned int xfer_mask.
766 *
767 * LOCKING:
768 * None.
769 *
770 * RETURNS:
771 * Packed xfer_mask.
772 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900773unsigned long ata_pack_xfermask(unsigned long pio_mask,
774 unsigned long mwdma_mask,
775 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900776{
777 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
778 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
779 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
780}
781
Tejun Heoc0489e42006-03-24 14:07:49 +0900782/**
783 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
784 * @xfer_mask: xfer_mask to unpack
785 * @pio_mask: resulting pio_mask
786 * @mwdma_mask: resulting mwdma_mask
787 * @udma_mask: resulting udma_mask
788 *
789 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
790 * Any NULL distination masks will be ignored.
791 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900792void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
793 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900794{
795 if (pio_mask)
796 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
797 if (mwdma_mask)
798 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
799 if (udma_mask)
800 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
801}
802
Tejun Heocb95d562006-03-06 04:31:56 +0900803static const struct ata_xfer_ent {
Tejun Heobe9a50c82006-03-31 22:48:52 +0900804 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900805 u8 base;
806} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900807 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
808 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
809 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900810 { -1, },
811};
812
813/**
814 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
815 * @xfer_mask: xfer_mask of interest
816 *
817 * Return matching XFER_* value for @xfer_mask. Only the highest
818 * bit of @xfer_mask is considered.
819 *
820 * LOCKING:
821 * None.
822 *
823 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900824 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900825 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900826u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900827{
828 int highbit = fls(xfer_mask) - 1;
829 const struct ata_xfer_ent *ent;
830
831 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
832 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
833 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900834 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900835}
836
837/**
838 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
839 * @xfer_mode: XFER_* of interest
840 *
841 * Return matching xfer_mask for @xfer_mode.
842 *
843 * LOCKING:
844 * None.
845 *
846 * RETURNS:
847 * Matching xfer_mask, 0 if no match found.
848 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900849unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900850{
851 const struct ata_xfer_ent *ent;
852
853 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
854 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900855 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
856 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900857 return 0;
858}
859
860/**
861 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
862 * @xfer_mode: XFER_* of interest
863 *
864 * Return matching xfer_shift for @xfer_mode.
865 *
866 * LOCKING:
867 * None.
868 *
869 * RETURNS:
870 * Matching xfer_shift, -1 if no match found.
871 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900872int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900873{
874 const struct ata_xfer_ent *ent;
875
876 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
877 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
878 return ent->shift;
879 return -1;
880}
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900883 * ata_mode_string - convert xfer_mask to string
884 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 *
886 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900887 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 *
889 * LOCKING:
890 * None.
891 *
892 * RETURNS:
893 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900894 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900896const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897{
Tejun Heo75f554b2006-03-06 04:31:57 +0900898 static const char * const xfer_mode_str[] = {
899 "PIO0",
900 "PIO1",
901 "PIO2",
902 "PIO3",
903 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100904 "PIO5",
905 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900906 "MWDMA0",
907 "MWDMA1",
908 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100909 "MWDMA3",
910 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +0900911 "UDMA/16",
912 "UDMA/25",
913 "UDMA/33",
914 "UDMA/44",
915 "UDMA/66",
916 "UDMA/100",
917 "UDMA/133",
918 "UDMA7",
919 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900920 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900922 highbit = fls(xfer_mask) - 1;
923 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
924 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926}
927
Tejun Heo4c360c82006-04-01 01:38:17 +0900928static const char *sata_spd_string(unsigned int spd)
929{
930 static const char * const spd_str[] = {
931 "1.5 Gbps",
932 "3.0 Gbps",
933 };
934
935 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
936 return "<unknown>";
937 return spd_str[spd - 1];
938}
939
Tejun Heo3373efd2006-05-15 20:57:53 +0900940void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900941{
Tejun Heo09d7f9b2007-06-25 23:34:02 +0900942 if (ata_dev_enabled(dev)) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900943 if (ata_msg_drv(dev->link->ap))
Tejun Heo09d7f9b2007-06-25 23:34:02 +0900944 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo562f0c22007-12-15 15:05:01 +0900945 ata_acpi_on_disable(dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +0900946 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
947 ATA_DNXFER_QUIET);
Tejun Heo0b8efb02006-03-24 15:25:31 +0900948 dev->class++;
949 }
950}
951
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400952static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
953{
954 struct ata_link *link = dev->link;
955 struct ata_port *ap = link->ap;
956 u32 scontrol;
957 unsigned int err_mask;
958 int rc;
959
960 /*
961 * disallow DIPM for drivers which haven't set
962 * ATA_FLAG_IPM. This is because when DIPM is enabled,
963 * phy ready will be set in the interrupt status on
964 * state changes, which will cause some drivers to
965 * think there are errors - additionally drivers will
966 * need to disable hot plug.
967 */
968 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
969 ap->pm_policy = NOT_AVAILABLE;
970 return -EINVAL;
971 }
972
973 /*
974 * For DIPM, we will only enable it for the
975 * min_power setting.
976 *
977 * Why? Because Disks are too stupid to know that
978 * If the host rejects a request to go to SLUMBER
979 * they should retry at PARTIAL, and instead it
980 * just would give up. So, for medium_power to
981 * work at all, we need to only allow HIPM.
982 */
983 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
984 if (rc)
985 return rc;
986
987 switch (policy) {
988 case MIN_POWER:
989 /* no restrictions on IPM transitions */
990 scontrol &= ~(0x3 << 8);
991 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
992 if (rc)
993 return rc;
994
995 /* enable DIPM */
996 if (dev->flags & ATA_DFLAG_DIPM)
997 err_mask = ata_dev_set_feature(dev,
998 SETFEATURES_SATA_ENABLE, SATA_DIPM);
999 break;
1000 case MEDIUM_POWER:
1001 /* allow IPM to PARTIAL */
1002 scontrol &= ~(0x1 << 8);
1003 scontrol |= (0x2 << 8);
1004 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1005 if (rc)
1006 return rc;
1007
Kristen Carlson Accardif5456b62007-11-02 16:37:08 -07001008 /*
1009 * we don't have to disable DIPM since IPM flags
1010 * disallow transitions to SLUMBER, which effectively
1011 * disable DIPM if it does not support PARTIAL
1012 */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001013 break;
1014 case NOT_AVAILABLE:
1015 case MAX_PERFORMANCE:
1016 /* disable all IPM transitions */
1017 scontrol |= (0x3 << 8);
1018 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1019 if (rc)
1020 return rc;
1021
Kristen Carlson Accardif5456b62007-11-02 16:37:08 -07001022 /*
1023 * we don't have to disable DIPM since IPM flags
1024 * disallow all transitions which effectively
1025 * disable DIPM anyway.
1026 */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001027 break;
1028 }
1029
1030 /* FIXME: handle SET FEATURES failure */
1031 (void) err_mask;
1032
1033 return 0;
1034}
1035
1036/**
1037 * ata_dev_enable_pm - enable SATA interface power management
Stephen Hemminger48166fd2007-10-31 10:00:27 -07001038 * @dev: device to enable power management
1039 * @policy: the link power management policy
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001040 *
1041 * Enable SATA Interface power management. This will enable
1042 * Device Interface Power Management (DIPM) for min_power
1043 * policy, and then call driver specific callbacks for
1044 * enabling Host Initiated Power management.
1045 *
1046 * Locking: Caller.
1047 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1048 */
1049void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
1050{
1051 int rc = 0;
1052 struct ata_port *ap = dev->link->ap;
1053
1054 /* set HIPM first, then DIPM */
1055 if (ap->ops->enable_pm)
1056 rc = ap->ops->enable_pm(ap, policy);
1057 if (rc)
1058 goto enable_pm_out;
1059 rc = ata_dev_set_dipm(dev, policy);
1060
1061enable_pm_out:
1062 if (rc)
1063 ap->pm_policy = MAX_PERFORMANCE;
1064 else
1065 ap->pm_policy = policy;
1066 return /* rc */; /* hopefully we can use 'rc' eventually */
1067}
1068
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001069#ifdef CONFIG_PM
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001070/**
1071 * ata_dev_disable_pm - disable SATA interface power management
Stephen Hemminger48166fd2007-10-31 10:00:27 -07001072 * @dev: device to disable power management
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001073 *
1074 * Disable SATA Interface power management. This will disable
1075 * Device Interface Power Management (DIPM) without changing
1076 * policy, call driver specific callbacks for disabling Host
1077 * Initiated Power management.
1078 *
1079 * Locking: Caller.
1080 * Returns: void
1081 */
1082static void ata_dev_disable_pm(struct ata_device *dev)
1083{
1084 struct ata_port *ap = dev->link->ap;
1085
1086 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
1087 if (ap->ops->disable_pm)
1088 ap->ops->disable_pm(ap);
1089}
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001090#endif /* CONFIG_PM */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001091
1092void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
1093{
1094 ap->pm_policy = policy;
Tejun Heo3ec25eb2008-03-27 18:37:14 +09001095 ap->link.eh_info.action |= ATA_EH_LPM;
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001096 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
1097 ata_port_schedule_eh(ap);
1098}
1099
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001100#ifdef CONFIG_PM
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001101static void ata_lpm_enable(struct ata_host *host)
1102{
1103 struct ata_link *link;
1104 struct ata_port *ap;
1105 struct ata_device *dev;
1106 int i;
1107
1108 for (i = 0; i < host->n_ports; i++) {
1109 ap = host->ports[i];
1110 ata_port_for_each_link(link, ap) {
1111 ata_link_for_each_dev(dev, link)
1112 ata_dev_disable_pm(dev);
1113 }
1114 }
1115}
1116
1117static void ata_lpm_disable(struct ata_host *host)
1118{
1119 int i;
1120
1121 for (i = 0; i < host->n_ports; i++) {
1122 struct ata_port *ap = host->ports[i];
1123 ata_lpm_schedule(ap, ap->pm_policy);
1124 }
1125}
Stephen Rothwell1992a5e2007-10-31 14:53:32 +11001126#endif /* CONFIG_PM */
Kristen Carlson Accardica773292007-10-25 00:58:59 -04001127
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128/**
1129 * ata_dev_classify - determine device type based on ATA-spec signature
1130 * @tf: ATA taskfile register set for device to be identified
1131 *
1132 * Determine from taskfile register contents whether a device is
1133 * ATA or ATAPI, as per "Signature and persistence" section
1134 * of ATA/PI spec (volume 1, sect 5.14).
1135 *
1136 * LOCKING:
1137 * None.
1138 *
1139 * RETURNS:
Tejun Heo633273a2007-09-23 13:19:54 +09001140 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1141 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 */
Jeff Garzik057ace52005-10-22 14:27:05 -04001143unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144{
1145 /* Apple's open source Darwin code hints that some devices only
1146 * put a proper signature into the LBA mid/high registers,
1147 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a2007-09-23 13:19:54 +09001148 *
1149 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1150 * signatures for ATA and ATAPI devices attached on SerialATA,
1151 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1152 * spec has never mentioned about using different signatures
1153 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1154 * Multiplier specification began to use 0x69/0x96 to identify
1155 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1156 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1157 * 0x69/0x96 shortly and described them as reserved for
1158 * SerialATA.
1159 *
1160 * We follow the current spec and consider that 0x69/0x96
1161 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 */
Tejun Heo633273a2007-09-23 13:19:54 +09001163 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 DPRINTK("found ATA device by sig\n");
1165 return ATA_DEV_ATA;
1166 }
1167
Tejun Heo633273a2007-09-23 13:19:54 +09001168 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 DPRINTK("found ATAPI device by sig\n");
1170 return ATA_DEV_ATAPI;
1171 }
1172
Tejun Heo633273a2007-09-23 13:19:54 +09001173 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1174 DPRINTK("found PMP device by sig\n");
1175 return ATA_DEV_PMP;
1176 }
1177
1178 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001179 printk(KERN_INFO "ata: SEMB device ignored\n");
Tejun Heo633273a2007-09-23 13:19:54 +09001180 return ATA_DEV_SEMB_UNSUP; /* not yet */
1181 }
1182
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 DPRINTK("unknown device\n");
1184 return ATA_DEV_UNKNOWN;
1185}
1186
1187/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001188 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 * @id: IDENTIFY DEVICE results we will examine
1190 * @s: string into which data is output
1191 * @ofs: offset into identify device page
1192 * @len: length of string to return. must be an even number.
1193 *
1194 * The strings in the IDENTIFY DEVICE page are broken up into
1195 * 16-bit chunks. Run through the string, and output each
1196 * 8-bit chunk linearly, regardless of platform.
1197 *
1198 * LOCKING:
1199 * caller.
1200 */
1201
Tejun Heo6a62a042006-02-13 10:02:46 +09001202void ata_id_string(const u16 *id, unsigned char *s,
1203 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204{
1205 unsigned int c;
1206
Alan Cox963e4972008-07-24 17:16:06 +01001207 BUG_ON(len & 1);
1208
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 while (len > 0) {
1210 c = id[ofs] >> 8;
1211 *s = c;
1212 s++;
1213
1214 c = id[ofs] & 0xff;
1215 *s = c;
1216 s++;
1217
1218 ofs++;
1219 len -= 2;
1220 }
1221}
1222
Tejun Heo0e949ff2006-02-12 22:47:04 +09001223/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001224 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001225 * @id: IDENTIFY DEVICE results we will examine
1226 * @s: string into which data is output
1227 * @ofs: offset into identify device page
1228 * @len: length of string to return. must be an odd number.
1229 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001230 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001231 * trims trailing spaces and terminates the resulting string with
1232 * null. @len must be actual maximum length (even number) + 1.
1233 *
1234 * LOCKING:
1235 * caller.
1236 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001237void ata_id_c_string(const u16 *id, unsigned char *s,
1238 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001239{
1240 unsigned char *p;
1241
Tejun Heo6a62a042006-02-13 10:02:46 +09001242 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001243
1244 p = s + strnlen(s, len - 1);
1245 while (p > s && p[-1] == ' ')
1246 p--;
1247 *p = '\0';
1248}
Edward Falk0baab862005-06-02 18:17:13 -04001249
Tejun Heodb6f8752007-09-03 12:31:58 +09001250static u64 ata_id_n_sectors(const u16 *id)
1251{
1252 if (ata_id_has_lba(id)) {
1253 if (ata_id_has_lba48(id))
1254 return ata_id_u64(id, 100);
1255 else
1256 return ata_id_u32(id, 60);
1257 } else {
1258 if (ata_id_current_chs_valid(id))
1259 return ata_id_u32(id, 57);
1260 else
1261 return id[1] * id[3] * id[6];
1262 }
1263}
1264
Tejun Heoa5987e02008-03-27 19:14:23 +09001265u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001266{
1267 u64 sectors = 0;
1268
1269 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1270 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
Roland Dreierba14a9c2008-10-28 16:52:20 -07001271 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
Alan Cox1e999732007-04-11 00:23:13 +01001272 sectors |= (tf->lbah & 0xff) << 16;
1273 sectors |= (tf->lbam & 0xff) << 8;
1274 sectors |= (tf->lbal & 0xff);
1275
Tejun Heoa5987e02008-03-27 19:14:23 +09001276 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001277}
1278
Tejun Heoa5987e02008-03-27 19:14:23 +09001279u64 ata_tf_to_lba(const struct ata_taskfile *tf)
Alan Cox1e999732007-04-11 00:23:13 +01001280{
1281 u64 sectors = 0;
1282
1283 sectors |= (tf->device & 0x0f) << 24;
1284 sectors |= (tf->lbah & 0xff) << 16;
1285 sectors |= (tf->lbam & 0xff) << 8;
1286 sectors |= (tf->lbal & 0xff);
1287
Tejun Heoa5987e02008-03-27 19:14:23 +09001288 return sectors;
Alan Cox1e999732007-04-11 00:23:13 +01001289}
1290
1291/**
Tejun Heoc728a912007-09-03 12:32:30 +09001292 * ata_read_native_max_address - Read native max address
1293 * @dev: target device
1294 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001295 *
Tejun Heoc728a912007-09-03 12:32:30 +09001296 * Perform an LBA48 or LBA28 native size query upon the device in
1297 * question.
1298 *
1299 * RETURNS:
1300 * 0 on success, -EACCES if command is aborted by the drive.
1301 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001302 */
Tejun Heoc728a912007-09-03 12:32:30 +09001303static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001304{
Tejun Heoc728a912007-09-03 12:32:30 +09001305 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001306 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001307 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001308
1309 ata_tf_init(dev, &tf);
1310
Tejun Heoc728a912007-09-03 12:32:30 +09001311 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001312 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001313
1314 if (lba48) {
1315 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1316 tf.flags |= ATA_TFLAG_LBA48;
1317 } else
1318 tf.command = ATA_CMD_READ_NATIVE_MAX;
1319
Alan Cox1e999732007-04-11 00:23:13 +01001320 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001321 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001322
Tejun Heo2b789102007-10-09 15:05:44 +09001323 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001324 if (err_mask) {
1325 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1326 "max address (err_mask=0x%x)\n", err_mask);
1327 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1328 return -EACCES;
1329 return -EIO;
1330 }
Alan Cox1e999732007-04-11 00:23:13 +01001331
Tejun Heoc728a912007-09-03 12:32:30 +09001332 if (lba48)
Tejun Heoa5987e02008-03-27 19:14:23 +09001333 *max_sectors = ata_tf_to_lba48(&tf) + 1;
Tejun Heoc728a912007-09-03 12:32:30 +09001334 else
Tejun Heoa5987e02008-03-27 19:14:23 +09001335 *max_sectors = ata_tf_to_lba(&tf) + 1;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001336 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001337 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001338 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001339}
1340
1341/**
Tejun Heoc728a912007-09-03 12:32:30 +09001342 * ata_set_max_sectors - Set max sectors
1343 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001344 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001345 *
Tejun Heoc728a912007-09-03 12:32:30 +09001346 * Set max sectors of @dev to @new_sectors.
1347 *
1348 * RETURNS:
1349 * 0 on success, -EACCES if command is aborted or denied (due to
1350 * previous non-volatile SET_MAX) by the drive. -EIO on other
1351 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001352 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001353static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001354{
Tejun Heoc728a912007-09-03 12:32:30 +09001355 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001356 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001357 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001358
1359 new_sectors--;
1360
1361 ata_tf_init(dev, &tf);
1362
Alan Cox1e999732007-04-11 00:23:13 +01001363 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001364
1365 if (lba48) {
1366 tf.command = ATA_CMD_SET_MAX_EXT;
1367 tf.flags |= ATA_TFLAG_LBA48;
1368
1369 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1370 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1371 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001372 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001373 tf.command = ATA_CMD_SET_MAX;
1374
Tejun Heo1e582ba2007-09-21 20:07:14 +09001375 tf.device |= (new_sectors >> 24) & 0xf;
1376 }
1377
Alan Cox1e999732007-04-11 00:23:13 +01001378 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001379 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001380
1381 tf.lbal = (new_sectors >> 0) & 0xff;
1382 tf.lbam = (new_sectors >> 8) & 0xff;
1383 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001384
Tejun Heo2b789102007-10-09 15:05:44 +09001385 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001386 if (err_mask) {
1387 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1388 "max address (err_mask=0x%x)\n", err_mask);
1389 if (err_mask == AC_ERR_DEV &&
1390 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1391 return -EACCES;
1392 return -EIO;
1393 }
Alan Cox1e999732007-04-11 00:23:13 +01001394
Tejun Heoc728a912007-09-03 12:32:30 +09001395 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001396}
1397
1398/**
1399 * ata_hpa_resize - Resize a device with an HPA set
1400 * @dev: Device to resize
1401 *
1402 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1403 * it if required to the full size of the media. The caller must check
1404 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001405 *
1406 * RETURNS:
1407 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001408 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001409static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001410{
Tejun Heo05027ad2007-09-03 12:32:57 +09001411 struct ata_eh_context *ehc = &dev->link->eh_context;
1412 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1413 u64 sectors = ata_id_n_sectors(dev->id);
1414 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001415 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001416
Tejun Heo05027ad2007-09-03 12:32:57 +09001417 /* do we need to do it? */
1418 if (dev->class != ATA_DEV_ATA ||
1419 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1420 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001421 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001422
Tejun Heo05027ad2007-09-03 12:32:57 +09001423 /* read native max address */
1424 rc = ata_read_native_max_address(dev, &native_sectors);
1425 if (rc) {
Tejun Heodda7aba2008-03-23 21:05:15 +09001426 /* If device aborted the command or HPA isn't going to
1427 * be unlocked, skip HPA resizing.
Tejun Heo05027ad2007-09-03 12:32:57 +09001428 */
Tejun Heodda7aba2008-03-23 21:05:15 +09001429 if (rc == -EACCES || !ata_ignore_hpa) {
Tejun Heo05027ad2007-09-03 12:32:57 +09001430 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
Tejun Heodda7aba2008-03-23 21:05:15 +09001431 "broken, skipping HPA handling\n");
Tejun Heo05027ad2007-09-03 12:32:57 +09001432 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001433
Tejun Heo05027ad2007-09-03 12:32:57 +09001434 /* we can continue if device aborted the command */
1435 if (rc == -EACCES)
1436 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001437 }
Tejun Heo37301a52007-06-25 20:45:54 +09001438
Tejun Heo05027ad2007-09-03 12:32:57 +09001439 return rc;
1440 }
1441
1442 /* nothing to do? */
1443 if (native_sectors <= sectors || !ata_ignore_hpa) {
1444 if (!print_info || native_sectors == sectors)
1445 return 0;
1446
1447 if (native_sectors > sectors)
1448 ata_dev_printk(dev, KERN_INFO,
1449 "HPA detected: current %llu, native %llu\n",
1450 (unsigned long long)sectors,
1451 (unsigned long long)native_sectors);
1452 else if (native_sectors < sectors)
1453 ata_dev_printk(dev, KERN_WARNING,
1454 "native sectors (%llu) is smaller than "
1455 "sectors (%llu)\n",
1456 (unsigned long long)native_sectors,
1457 (unsigned long long)sectors);
1458 return 0;
1459 }
1460
1461 /* let's unlock HPA */
1462 rc = ata_set_max_sectors(dev, native_sectors);
1463 if (rc == -EACCES) {
1464 /* if device aborted the command, skip HPA resizing */
1465 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1466 "(%llu -> %llu), skipping HPA handling\n",
1467 (unsigned long long)sectors,
1468 (unsigned long long)native_sectors);
1469 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1470 return 0;
1471 } else if (rc)
1472 return rc;
1473
1474 /* re-read IDENTIFY data */
1475 rc = ata_dev_reread_id(dev, 0);
1476 if (rc) {
1477 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1478 "data after HPA resizing\n");
1479 return rc;
1480 }
1481
1482 if (print_info) {
1483 u64 new_sectors = ata_id_n_sectors(dev->id);
1484 ata_dev_printk(dev, KERN_INFO,
1485 "HPA unlocked: %llu -> %llu, native %llu\n",
1486 (unsigned long long)sectors,
1487 (unsigned long long)new_sectors,
1488 (unsigned long long)native_sectors);
1489 }
1490
1491 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001492}
1493
Edward Falk0baab862005-06-02 18:17:13 -04001494/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001496 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001498 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1499 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 *
1501 * LOCKING:
1502 * caller.
1503 */
1504
Tejun Heo0bd33002006-02-12 22:47:05 +09001505static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506{
1507 DPRINTK("49==0x%04x "
1508 "53==0x%04x "
1509 "63==0x%04x "
1510 "64==0x%04x "
1511 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001512 id[49],
1513 id[53],
1514 id[63],
1515 id[64],
1516 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 DPRINTK("80==0x%04x "
1518 "81==0x%04x "
1519 "82==0x%04x "
1520 "83==0x%04x "
1521 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001522 id[80],
1523 id[81],
1524 id[82],
1525 id[83],
1526 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 DPRINTK("88==0x%04x "
1528 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001529 id[88],
1530 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531}
1532
Tejun Heocb95d562006-03-06 04:31:56 +09001533/**
1534 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1535 * @id: IDENTIFY data to compute xfer mask from
1536 *
1537 * Compute the xfermask for this device. This is not as trivial
1538 * as it seems if we must consider early devices correctly.
1539 *
1540 * FIXME: pre IDE drive timing (do we care ?).
1541 *
1542 * LOCKING:
1543 * None.
1544 *
1545 * RETURNS:
1546 * Computed xfermask
1547 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001548unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001549{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001550 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001551
1552 /* Usual case. Word 53 indicates word 64 is valid */
1553 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1554 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1555 pio_mask <<= 3;
1556 pio_mask |= 0x7;
1557 } else {
1558 /* If word 64 isn't valid then Word 51 high byte holds
1559 * the PIO timing number for the maximum. Turn it into
1560 * a mask.
1561 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001562 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001563 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001564 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001565 else
1566 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001567
1568 /* But wait.. there's more. Design your standards by
1569 * committee and you too can get a free iordy field to
1570 * process. However its the speeds not the modes that
1571 * are supported... Note drivers using the timing API
1572 * will get this right anyway
1573 */
1574 }
1575
1576 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001577
Alan Coxb352e572006-08-10 18:52:12 +01001578 if (ata_id_is_cfa(id)) {
1579 /*
1580 * Process compact flash extended modes
1581 */
1582 int pio = id[163] & 0x7;
1583 int dma = (id[163] >> 3) & 7;
1584
1585 if (pio)
1586 pio_mask |= (1 << 5);
1587 if (pio > 1)
1588 pio_mask |= (1 << 6);
1589 if (dma)
1590 mwdma_mask |= (1 << 3);
1591 if (dma > 1)
1592 mwdma_mask |= (1 << 4);
1593 }
1594
Tejun Heofb21f0d2006-03-12 12:34:35 +09001595 udma_mask = 0;
1596 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1597 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001598
1599 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1600}
1601
Tejun Heo86e45b62006-03-05 15:29:09 +09001602/**
Jeff Garzik442eacc2007-12-19 04:25:10 -05001603 * ata_pio_queue_task - Queue port_task
Tejun Heo86e45b62006-03-05 15:29:09 +09001604 * @ap: The ata_port to queue port_task for
David Howells65f27f32006-11-22 14:55:48 +00001605 * @data: data for @fn to use
Tejun Heo341c2c92008-05-20 02:17:51 +09001606 * @delay: delay time in msecs for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +09001607 *
1608 * Schedule @fn(@data) for execution after @delay jiffies using
1609 * port_task. There is one port_task per port and it's the
1610 * user(low level driver)'s responsibility to make sure that only
1611 * one task is active at any given time.
1612 *
1613 * libata core layer takes care of synchronization between
Jeff Garzik442eacc2007-12-19 04:25:10 -05001614 * port_task and EH. ata_pio_queue_task() may be ignored for EH
Tejun Heo86e45b62006-03-05 15:29:09 +09001615 * synchronization.
1616 *
1617 * LOCKING:
1618 * Inherited from caller.
1619 */
Tejun Heo624d5c52008-03-25 22:16:41 +09001620void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
Tejun Heo86e45b62006-03-05 15:29:09 +09001621{
David Howells65f27f32006-11-22 14:55:48 +00001622 ap->port_task_data = data;
Tejun Heo86e45b62006-03-05 15:29:09 +09001623
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001624 /* may fail if ata_port_flush_task() in progress */
Tejun Heo341c2c92008-05-20 02:17:51 +09001625 queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
Tejun Heo86e45b62006-03-05 15:29:09 +09001626}
1627
1628/**
1629 * ata_port_flush_task - Flush port_task
1630 * @ap: The ata_port to flush port_task for
1631 *
1632 * After this function completes, port_task is guranteed not to
1633 * be running or scheduled.
1634 *
1635 * LOCKING:
1636 * Kernel thread context (may sleep)
1637 */
1638void ata_port_flush_task(struct ata_port *ap)
1639{
Tejun Heo86e45b62006-03-05 15:29:09 +09001640 DPRINTK("ENTER\n");
1641
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001642 cancel_rearming_delayed_work(&ap->port_task);
Tejun Heo86e45b62006-03-05 15:29:09 +09001643
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001644 if (ata_msg_ctl(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08001645 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__);
Tejun Heo86e45b62006-03-05 15:29:09 +09001646}
1647
Adrian Bunk7102d232007-01-04 00:09:36 +01001648static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001649{
Tejun Heo77853bf2006-01-23 13:09:36 +09001650 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001651
Tejun Heoa2a7a662005-12-13 14:48:31 +09001652 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001653}
1654
1655/**
Tejun Heo24326972006-11-14 22:47:09 +09001656 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001657 * @dev: Device to which the command is sent
1658 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001659 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001660 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001661 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001662 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001663 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001664 *
1665 * Executes libata internal command with timeout. @tf contains
1666 * command on entry and result on return. Timeout and error
1667 * conditions are reported via return value. No recovery action
1668 * is taken after a command times out. It's caller's duty to
1669 * clean up after timeout.
1670 *
1671 * LOCKING:
1672 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001673 *
1674 * RETURNS:
1675 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001676 */
Tejun Heo24326972006-11-14 22:47:09 +09001677unsigned ata_exec_internal_sg(struct ata_device *dev,
1678 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001679 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001680 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001681{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001682 struct ata_link *link = dev->link;
1683 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001684 u8 command = tf->command;
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001685 int auto_timeout = 0;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001686 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001687 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001688 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001689 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001690 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001691 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001692 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001693 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001694
Jeff Garzikba6a1302006-06-22 23:46:10 -04001695 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001696
Tejun Heoe3180492006-05-15 20:58:09 +09001697 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001698 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001699 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001700 return AC_ERR_SYSTEM;
1701 }
1702
Tejun Heo2ab7db12006-05-15 20:58:02 +09001703 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001704
Tejun Heo2ab7db12006-05-15 20:58:02 +09001705 /* XXX: Tag 0 is used for drivers with legacy EH as some
1706 * drivers choke if any other tag is given. This breaks
1707 * ata_tag_internal() test for those drivers. Don't use new
1708 * EH stuff without converting to it.
1709 */
1710 if (ap->ops->error_handler)
1711 tag = ATA_TAG_INTERNAL;
1712 else
1713 tag = 0;
1714
Tejun Heo8a8bc222008-11-10 14:48:21 +09001715 if (test_and_set_bit(tag, &ap->qc_allocated))
1716 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001717 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001718
1719 qc->tag = tag;
1720 qc->scsicmd = NULL;
1721 qc->ap = ap;
1722 qc->dev = dev;
1723 ata_qc_reinit(qc);
1724
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001725 preempted_tag = link->active_tag;
1726 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001727 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001728 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001729 link->active_tag = ATA_TAG_POISON;
1730 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001731 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001732 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001733
1734 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001735 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001736 if (cdb)
1737 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001738 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001739 qc->dma_dir = dma_dir;
1740 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001741 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001742 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001743
Jens Axboe87260212007-10-16 11:14:12 +02001744 for_each_sg(sgl, sg, n_elem, i)
1745 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001746
Jens Axboe87260212007-10-16 11:14:12 +02001747 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001748 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001749 }
1750
Tejun Heo77853bf2006-01-23 13:09:36 +09001751 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001752 qc->complete_fn = ata_qc_complete_internal;
1753
Tejun Heo8e0e6942006-03-31 20:41:11 +09001754 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001755
Jeff Garzikba6a1302006-06-22 23:46:10 -04001756 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001757
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001758 if (!timeout) {
1759 if (ata_probe_timeout)
1760 timeout = ata_probe_timeout * 1000;
1761 else {
1762 timeout = ata_internal_cmd_timeout(dev, command);
1763 auto_timeout = 1;
1764 }
1765 }
Tejun Heo2b789102007-10-09 15:05:44 +09001766
1767 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001768
Tejun Heod95a7172006-05-15 20:58:14 +09001769 ata_port_flush_task(ap);
1770
1771 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001772 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001773
1774 /* We're racing with irq here. If we lose, the
1775 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001776 * twice. If we win, the port is frozen and will be
1777 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001778 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001779 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001780 qc->err_mask |= AC_ERR_TIMEOUT;
1781
1782 if (ap->ops->error_handler)
1783 ata_port_freeze(ap);
1784 else
1785 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001786
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001787 if (ata_msg_warn(ap))
1788 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001789 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001790 }
1791
Jeff Garzikba6a1302006-06-22 23:46:10 -04001792 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001793 }
1794
Tejun Heod95a7172006-05-15 20:58:14 +09001795 /* do post_internal_cmd */
1796 if (ap->ops->post_internal_cmd)
1797 ap->ops->post_internal_cmd(qc);
1798
Tejun Heoa51d6442007-03-20 15:24:11 +09001799 /* perform minimal error analysis */
1800 if (qc->flags & ATA_QCFLAG_FAILED) {
1801 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1802 qc->err_mask |= AC_ERR_DEV;
1803
1804 if (!qc->err_mask)
1805 qc->err_mask |= AC_ERR_OTHER;
1806
1807 if (qc->err_mask & ~AC_ERR_OTHER)
1808 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001809 }
1810
Tejun Heo15869302006-05-15 20:57:33 +09001811 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001812 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001813
Tejun Heoe61e0672006-05-15 20:57:40 +09001814 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001815 err_mask = qc->err_mask;
1816
1817 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001818 link->active_tag = preempted_tag;
1819 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001820 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001821 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001822
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001823 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1824 * Until those drivers are fixed, we detect the condition
1825 * here, fail the command with AC_ERR_SYSTEM and reenable the
1826 * port.
1827 *
1828 * Note that this doesn't change any behavior as internal
1829 * command failure results in disabling the device in the
1830 * higher layer for LLDDs without new reset/EH callbacks.
1831 *
1832 * Kill the following code as soon as those drivers are fixed.
1833 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001834 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001835 err_mask |= AC_ERR_SYSTEM;
1836 ata_port_probe(ap);
1837 }
1838
Jeff Garzikba6a1302006-06-22 23:46:10 -04001839 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001840
Tejun Heo87fbc5a2008-05-20 02:17:54 +09001841 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1842 ata_internal_cmd_timed_out(dev, command);
1843
Tejun Heo77853bf2006-01-23 13:09:36 +09001844 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001845}
1846
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847/**
Tejun Heo33480a02006-12-12 02:15:31 +09001848 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001849 * @dev: Device to which the command is sent
1850 * @tf: Taskfile registers for the command and the result
1851 * @cdb: CDB for packet command
1852 * @dma_dir: Data tranfer direction of the command
1853 * @buf: Data buffer of the command
1854 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001855 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001856 *
1857 * Wrapper around ata_exec_internal_sg() which takes simple
1858 * buffer instead of sg list.
1859 *
1860 * LOCKING:
1861 * None. Should be called with kernel context, might sleep.
1862 *
1863 * RETURNS:
1864 * Zero on success, AC_ERR_* mask on failure
1865 */
1866unsigned ata_exec_internal(struct ata_device *dev,
1867 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001868 int dma_dir, void *buf, unsigned int buflen,
1869 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001870{
Tejun Heo33480a02006-12-12 02:15:31 +09001871 struct scatterlist *psg = NULL, sg;
1872 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001873
Tejun Heo33480a02006-12-12 02:15:31 +09001874 if (dma_dir != DMA_NONE) {
1875 WARN_ON(!buf);
1876 sg_init_one(&sg, buf, buflen);
1877 psg = &sg;
1878 n_elem++;
1879 }
Tejun Heo24326972006-11-14 22:47:09 +09001880
Tejun Heo2b789102007-10-09 15:05:44 +09001881 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1882 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001883}
1884
1885/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001886 * ata_do_simple_cmd - execute simple internal command
1887 * @dev: Device to which the command is sent
1888 * @cmd: Opcode to execute
1889 *
1890 * Execute a 'simple' command, that only consists of the opcode
1891 * 'cmd' itself, without filling any other registers
1892 *
1893 * LOCKING:
1894 * Kernel thread context (may sleep).
1895 *
1896 * RETURNS:
1897 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001898 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001899unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001900{
1901 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001902
1903 ata_tf_init(dev, &tf);
1904
1905 tf.command = cmd;
1906 tf.flags |= ATA_TFLAG_DEVICE;
1907 tf.protocol = ATA_PROT_NODATA;
1908
Tejun Heo2b789102007-10-09 15:05:44 +09001909 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001910}
1911
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001913 * ata_pio_need_iordy - check if iordy needed
1914 * @adev: ATA device
1915 *
1916 * Check if the current speed of the device requires IORDY. Used
1917 * by various controllers for chip configuration.
1918 */
Jeff Garzika617c092007-05-21 20:14:23 -04001919
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001920unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1921{
Alan Cox432729f2007-03-08 23:22:59 +00001922 /* Controller doesn't support IORDY. Probably a pointless check
1923 as the caller should know this */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001924 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001925 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001926 /* PIO3 and higher it is mandatory */
1927 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001928 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001929 /* We turn it on when possible */
1930 if (ata_id_has_iordy(adev->id))
1931 return 1;
1932 return 0;
1933}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001934
Alan Cox432729f2007-03-08 23:22:59 +00001935/**
1936 * ata_pio_mask_no_iordy - Return the non IORDY mask
1937 * @adev: ATA device
1938 *
1939 * Compute the highest mode possible if we are not using iordy. Return
1940 * -1 if no iordy mode is available.
1941 */
Jeff Garzika617c092007-05-21 20:14:23 -04001942
Alan Cox432729f2007-03-08 23:22:59 +00001943static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1944{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001945 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001946 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001947 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001948 /* Is the speed faster than the drive allows non IORDY ? */
1949 if (pio) {
1950 /* This is cycle times not frequency - watch the logic! */
1951 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001952 return 3 << ATA_SHIFT_PIO;
1953 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001954 }
1955 }
Alan Cox432729f2007-03-08 23:22:59 +00001956 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001957}
1958
1959/**
Alan Cox963e4972008-07-24 17:16:06 +01001960 * ata_do_dev_read_id - default ID read method
1961 * @dev: device
1962 * @tf: proposed taskfile
1963 * @id: data buffer
1964 *
1965 * Issue the identify taskfile and hand back the buffer containing
1966 * identify data. For some RAID controllers and for pre ATA devices
1967 * this function is wrapped or replaced by the driver
1968 */
1969unsigned int ata_do_dev_read_id(struct ata_device *dev,
1970 struct ata_taskfile *tf, u16 *id)
1971{
1972 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1973 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1974}
1975
1976/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001977 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001978 * @dev: target device
1979 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001980 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001981 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001982 *
1983 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1984 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001985 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1986 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001987 *
Alan Cox50a99012007-08-08 14:27:00 +01001988 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001989 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01001990 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001991 * LOCKING:
1992 * Kernel thread context (may sleep)
1993 *
1994 * RETURNS:
1995 * 0 on success, -errno otherwise.
1996 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001997int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001998 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001999{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002000 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09002001 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09002002 struct ata_taskfile tf;
2003 unsigned int err_mask = 0;
2004 const char *reason;
Tejun Heo54936f82007-05-11 14:35:29 +02002005 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09002006 int rc;
2007
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002008 if (ata_msg_ctl(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002009 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
Tejun Heo49016ac2006-02-21 02:12:11 +09002010
Alan Cox963e4972008-07-24 17:16:06 +01002011retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09002012 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09002013
2014 switch (class) {
2015 case ATA_DEV_ATA:
2016 tf.command = ATA_CMD_ID_ATA;
2017 break;
2018 case ATA_DEV_ATAPI:
2019 tf.command = ATA_CMD_ID_ATAPI;
2020 break;
2021 default:
2022 rc = -ENODEV;
2023 reason = "unsupported class";
2024 goto err_out;
2025 }
2026
2027 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08002028
2029 /* Some devices choke if TF registers contain garbage. Make
2030 * sure those are properly initialized.
2031 */
2032 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2033
2034 /* Device presence detection is unreliable on some
2035 * controllers. Always poll IDENTIFY if available.
2036 */
2037 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09002038
Alan Cox963e4972008-07-24 17:16:06 +01002039 if (ap->ops->read_id)
2040 err_mask = ap->ops->read_id(dev, &tf, id);
2041 else
2042 err_mask = ata_do_dev_read_id(dev, &tf, id);
2043
Tejun Heo49016ac2006-02-21 02:12:11 +09002044 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09002045 if (err_mask & AC_ERR_NODEV_HINT) {
Tejun Heo1ffc1512008-03-23 15:16:53 +09002046 ata_dev_printk(dev, KERN_DEBUG,
2047 "NODEV after polling detection\n");
Tejun Heo55a8e2c2006-11-10 18:08:10 +09002048 return -ENOENT;
2049 }
2050
Tejun Heo1ffc1512008-03-23 15:16:53 +09002051 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
2052 /* Device or controller might have reported
2053 * the wrong device class. Give a shot at the
2054 * other IDENTIFY if the current one is
2055 * aborted by the device.
2056 */
2057 if (may_fallback) {
2058 may_fallback = 0;
Tejun Heo54936f82007-05-11 14:35:29 +02002059
Tejun Heo1ffc1512008-03-23 15:16:53 +09002060 if (class == ATA_DEV_ATA)
2061 class = ATA_DEV_ATAPI;
2062 else
2063 class = ATA_DEV_ATA;
2064 goto retry;
2065 }
2066
2067 /* Control reaches here iff the device aborted
2068 * both flavors of IDENTIFYs which happens
2069 * sometimes with phantom devices.
2070 */
2071 ata_dev_printk(dev, KERN_DEBUG,
2072 "both IDENTIFYs aborted, assuming NODEV\n");
2073 return -ENOENT;
Tejun Heo54936f82007-05-11 14:35:29 +02002074 }
2075
Tejun Heo49016ac2006-02-21 02:12:11 +09002076 rc = -EIO;
2077 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09002078 goto err_out;
2079 }
2080
Tejun Heo54936f82007-05-11 14:35:29 +02002081 /* Falling back doesn't make sense if ID data was read
2082 * successfully at least once.
2083 */
2084 may_fallback = 0;
2085
Tejun Heo49016ac2006-02-21 02:12:11 +09002086 swap_buf_le16(id, ATA_ID_WORDS);
2087
Tejun Heo49016ac2006-02-21 02:12:11 +09002088 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07002089 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01002090 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07002091
2092 if (class == ATA_DEV_ATA) {
2093 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
2094 goto err_out;
2095 } else {
2096 if (ata_id_is_ata(id))
2097 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09002098 }
2099
Mark Lord169439c2007-04-17 18:26:07 -04002100 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
2101 tried_spinup = 1;
2102 /*
2103 * Drive powered-up in standby mode, and requires a specific
2104 * SET_FEATURES spin-up subcommand before it will accept
2105 * anything other than the original IDENTIFY command.
2106 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002107 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07002108 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04002109 rc = -EIO;
2110 reason = "SPINUP failed";
2111 goto err_out;
2112 }
2113 /*
2114 * If the drive initially returned incomplete IDENTIFY info,
2115 * we now must reissue the IDENTIFY command.
2116 */
2117 if (id[2] == 0x37c8)
2118 goto retry;
2119 }
2120
Tejun Heobff04642006-11-10 18:08:10 +09002121 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09002122 /*
2123 * The exact sequence expected by certain pre-ATA4 drives is:
2124 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01002125 * IDENTIFY (optional in early ATA)
2126 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09002127 * anything else..
2128 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01002129 *
2130 * Note that ATA4 says lba is mandatory so the second check
2131 * shoud never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09002132 */
2133 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09002134 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09002135 if (err_mask) {
2136 rc = -EIO;
2137 reason = "INIT_DEV_PARAMS failed";
2138 goto err_out;
2139 }
2140
2141 /* current CHS translation info (id[53-58]) might be
2142 * changed. reread the identify device info.
2143 */
Tejun Heobff04642006-11-10 18:08:10 +09002144 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09002145 goto retry;
2146 }
2147 }
2148
2149 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09002150
Tejun Heo49016ac2006-02-21 02:12:11 +09002151 return 0;
2152
2153 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09002154 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002155 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09002156 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002157 return rc;
2158}
2159
Tejun Heo3373efd2006-05-15 20:57:53 +09002160static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002161{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002162 struct ata_port *ap = dev->link->ap;
Jens Axboe9ce8e302008-08-27 15:23:18 +02002163
2164 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2165 return 0;
2166
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002167 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002168}
2169
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002170static void ata_dev_config_ncq(struct ata_device *dev,
2171 char *desc, size_t desc_sz)
2172{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002173 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002174 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2175
2176 if (!ata_id_has_ncq(dev->id)) {
2177 desc[0] = '\0';
2178 return;
2179 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002180 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002181 snprintf(desc, desc_sz, "NCQ (not used)");
2182 return;
2183 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002184 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002185 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002186 dev->flags |= ATA_DFLAG_NCQ;
2187 }
2188
2189 if (hdepth >= ddepth)
2190 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2191 else
2192 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2193}
2194
Tejun Heo49016ac2006-02-21 02:12:11 +09002195/**
Tejun Heoffeae412006-03-01 16:09:35 +09002196 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002197 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 *
Tejun Heoffeae412006-03-01 16:09:35 +09002199 * Configure @dev according to @dev->id. Generic and low-level
2200 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 *
2202 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002203 * Kernel thread context (may sleep)
2204 *
2205 * RETURNS:
2206 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002208int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002210 struct ata_port *ap = dev->link->ap;
2211 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002212 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002213 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002214 unsigned long xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002215 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002216 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2217 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002218 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002220 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo44877b42007-02-21 01:06:51 +09002221 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002222 __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002223 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 }
2225
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002226 if (ata_msg_probe(ap))
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002227 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228
Tejun Heo75683fe2007-07-05 13:31:27 +09002229 /* set horkage */
2230 dev->horkage |= ata_dev_blacklisted(dev);
Tejun Heo33267322008-02-13 09:15:09 +09002231 ata_force_horkage(dev);
Tejun Heo75683fe2007-07-05 13:31:27 +09002232
Tejun Heo50af2fa2008-05-19 01:15:14 +09002233 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2234 ata_dev_printk(dev, KERN_INFO,
2235 "unsupported device, disabling\n");
2236 ata_dev_disable(dev);
2237 return 0;
2238 }
2239
Tejun Heo2486fa52008-07-31 07:52:40 +09002240 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2241 dev->class == ATA_DEV_ATAPI) {
2242 ata_dev_printk(dev, KERN_WARNING,
2243 "WARNING: ATAPI is %s, device ignored.\n",
2244 atapi_enabled ? "not supported with this driver"
2245 : "disabled");
2246 ata_dev_disable(dev);
2247 return 0;
2248 }
2249
Tejun Heo67465442007-05-15 03:28:16 +09002250 /* let ACPI work its magic */
2251 rc = ata_acpi_on_devcfg(dev);
2252 if (rc)
2253 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002254
Tejun Heo05027ad2007-09-03 12:32:57 +09002255 /* massage HPA, do it early as it might change IDENTIFY data */
2256 rc = ata_hpa_resize(dev);
2257 if (rc)
2258 return rc;
2259
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002260 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002261 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002262 ata_dev_printk(dev, KERN_DEBUG,
2263 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2264 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002265 __func__,
Tejun Heof15a1da2006-05-15 20:57:56 +09002266 id[49], id[82], id[83], id[84],
2267 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002268
Tejun Heo208a9932006-03-05 17:55:58 +09002269 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002270 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002271 dev->max_sectors = 0;
2272 dev->cdb_len = 0;
2273 dev->n_sectors = 0;
2274 dev->cylinders = 0;
2275 dev->heads = 0;
2276 dev->sectors = 0;
2277
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278 /*
2279 * common ATA, ATAPI feature tests
2280 */
2281
Tejun Heoff8854b2006-03-06 04:31:56 +09002282 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002283 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002285 if (ata_msg_probe(ap))
2286 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287
Albert Leeef143d52007-06-05 13:01:33 +08002288 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2289 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2290 sizeof(fwrevbuf));
2291
2292 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2293 sizeof(modelbuf));
2294
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 /* ATA-specific feature tests */
2296 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002297 if (ata_id_is_cfa(id)) {
2298 if (id[162] & 1) /* CPRM may make this media unusable */
Tejun Heo44877b42007-02-21 01:06:51 +09002299 ata_dev_printk(dev, KERN_WARNING,
2300 "supports DRM functions and may "
2301 "not be fully accessable.\n");
Alan Coxb352e572006-08-10 18:52:12 +01002302 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002303 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002304 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002305 /* Warn the user if the device has TPM extensions */
2306 if (ata_id_has_tpm(id))
2307 ata_dev_printk(dev, KERN_WARNING,
2308 "supports DRM functions and may "
2309 "not be fully accessable.\n");
2310 }
Alan Coxb352e572006-08-10 18:52:12 +01002311
Tejun Heo1148c3a2006-03-13 19:48:04 +09002312 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002313
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002314 if (dev->id[59] & 0x100)
2315 dev->multi_count = dev->id[59] & 0xff;
2316
Tejun Heo1148c3a2006-03-13 19:48:04 +09002317 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002318 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002319 char ncq_desc[20];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002320
Tejun Heo4c2d7212006-03-05 17:55:58 +09002321 lba_desc = "LBA";
2322 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002323 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002324 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002325 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002326
2327 if (dev->n_sectors >= (1UL << 28) &&
2328 ata_id_has_flush_ext(id))
2329 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002330 }
Albert Lee8bf62ec2005-05-12 15:29:42 -04002331
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002332 /* config NCQ */
2333 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2334
Albert Lee8bf62ec2005-05-12 15:29:42 -04002335 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002336 if (ata_msg_drv(ap) && print_info) {
2337 ata_dev_printk(dev, KERN_INFO,
2338 "%s: %s, %s, max %s\n",
2339 revbuf, modelbuf, fwrevbuf,
2340 ata_mode_string(xfer_mask));
2341 ata_dev_printk(dev, KERN_INFO,
2342 "%Lu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002343 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002344 dev->multi_count, lba_desc, ncq_desc);
2345 }
Tejun Heoffeae412006-03-01 16:09:35 +09002346 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002347 /* CHS */
2348
2349 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002350 dev->cylinders = id[1];
2351 dev->heads = id[3];
2352 dev->sectors = id[6];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002353
Tejun Heo1148c3a2006-03-13 19:48:04 +09002354 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04002355 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002356 dev->cylinders = id[54];
2357 dev->heads = id[55];
2358 dev->sectors = id[56];
Albert Lee8bf62ec2005-05-12 15:29:42 -04002359 }
2360
2361 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002362 if (ata_msg_drv(ap) && print_info) {
Tejun Heo88574552006-06-25 20:00:35 +09002363 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002364 "%s: %s, %s, max %s\n",
2365 revbuf, modelbuf, fwrevbuf,
2366 ata_mode_string(xfer_mask));
Jeff Garzika84471f2007-02-26 05:51:33 -05002367 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002368 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2369 (unsigned long long)dev->n_sectors,
2370 dev->multi_count, dev->cylinders,
2371 dev->heads, dev->sectors);
2372 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002373 }
2374
Tejun Heo6e7846e2006-02-12 23:32:58 +09002375 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376 }
2377
2378 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002379 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002380 const char *cdb_intr_string = "";
2381 const char *atapi_an_string = "";
Tejun Heo91163002008-02-21 13:25:50 +09002382 const char *dma_dir_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002383 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002384
Tejun Heo1148c3a2006-03-13 19:48:04 +09002385 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002387 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002388 ata_dev_printk(dev, KERN_WARNING,
2389 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002390 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 goto err_out_nosup;
2392 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002393 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394
Tejun Heo7d77b242007-09-23 13:14:13 +09002395 /* Enable ATAPI AN if both the host and device have
2396 * the support. If PMP is attached, SNTF is required
2397 * to enable ATAPI AN to discern between PHY status
2398 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002399 */
Tejun Heo7d77b242007-09-23 13:14:13 +09002400 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
Tejun Heo071f44b2008-04-07 22:47:22 +09002401 (!sata_pmp_attached(ap) ||
Tejun Heo7d77b242007-09-23 13:14:13 +09002402 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002403 unsigned int err_mask;
2404
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002405 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002406 err_mask = ata_dev_set_feature(dev,
2407 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002408 if (err_mask)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002409 ata_dev_printk(dev, KERN_ERR,
Tejun Heo854c73a2007-09-23 13:14:11 +09002410 "failed to enable ATAPI AN "
2411 "(err_mask=0x%x)\n", err_mask);
2412 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002413 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002414 atapi_an_string = ", ATAPI AN";
2415 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002416 }
2417
Albert Lee08a556d2006-03-31 13:29:04 +08002418 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002419 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002420 cdb_intr_string = ", CDB intr";
2421 }
Albert Lee312f7da2005-09-27 17:38:03 +08002422
Tejun Heo91163002008-02-21 13:25:50 +09002423 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2424 dev->flags |= ATA_DFLAG_DMADIR;
2425 dma_dir_string = ", DMADIR";
2426 }
2427
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002429 if (ata_msg_drv(ap) && print_info)
Albert Leeef143d52007-06-05 13:01:33 +08002430 ata_dev_printk(dev, KERN_INFO,
Tejun Heo91163002008-02-21 13:25:50 +09002431 "ATAPI: %s, %s, max %s%s%s%s\n",
Albert Leeef143d52007-06-05 13:01:33 +08002432 modelbuf, fwrevbuf,
Tejun Heo12436c32006-05-15 20:59:15 +09002433 ata_mode_string(xfer_mask),
Tejun Heo91163002008-02-21 13:25:50 +09002434 cdb_intr_string, atapi_an_string,
2435 dma_dir_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 }
2437
Tejun Heo914ed352006-11-01 18:39:55 +09002438 /* determine max_sectors */
2439 dev->max_sectors = ATA_MAX_SECTORS;
2440 if (dev->flags & ATA_DFLAG_LBA48)
2441 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2442
Kristen Carlson Accardica773292007-10-25 00:58:59 -04002443 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2444 if (ata_id_has_hipm(dev->id))
2445 dev->flags |= ATA_DFLAG_HIPM;
2446 if (ata_id_has_dipm(dev->id))
2447 dev->flags |= ATA_DFLAG_DIPM;
2448 }
2449
Alan Coxc5038fc2007-10-25 14:21:16 +01002450 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2451 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002452 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002453 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09002454 ata_dev_printk(dev, KERN_INFO,
2455 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002456 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002457 dev->max_sectors = ATA_MAX_SECTORS;
2458 }
2459
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002460 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002461 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002462 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002463 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2464 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002465
Tejun Heo75683fe2007-07-05 13:31:27 +09002466 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002467 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2468 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002469
Kristen Carlson Accardica773292007-10-25 00:58:59 -04002470 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2471 dev->horkage |= ATA_HORKAGE_IPM;
2472
2473 /* reset link pm_policy for this port to no pm */
2474 ap->pm_policy = MAX_PERFORMANCE;
2475 }
2476
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002477 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002478 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002479
Alan Coxc5038fc2007-10-25 14:21:16 +01002480 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2481 /* Let the user know. We don't want to disallow opens for
2482 rescue purposes, or in case the vendor is just a blithering
2483 idiot. Do this after the dev_config call as some controllers
2484 with buggy firmware may want to avoid reporting false device
2485 bugs */
2486
2487 if (print_info) {
2488 ata_dev_printk(dev, KERN_WARNING,
2489"Drive reports diagnostics failure. This may indicate a drive\n");
2490 ata_dev_printk(dev, KERN_WARNING,
2491"fault or invalid emulation. Contact drive vendor for information.\n");
2492 }
2493 }
2494
Tejun Heoac70a962008-11-27 13:36:48 +09002495 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2496 ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
2497 "firmware update to be fully functional.\n");
2498 ata_dev_printk(dev, KERN_WARNING, " contact the vendor "
2499 "or visit http://ata.wiki.kernel.org.\n");
2500 }
2501
Tejun Heoffeae412006-03-01 16:09:35 +09002502 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503
2504err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002505 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002506 ata_dev_printk(dev, KERN_DEBUG,
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002507 "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002508 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509}
2510
2511/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002512 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002513 * @ap: port
2514 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002515 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002516 * detection.
2517 */
2518
2519int ata_cable_40wire(struct ata_port *ap)
2520{
2521 return ATA_CBL_PATA40;
2522}
2523
2524/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002525 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002526 * @ap: port
2527 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002528 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002529 * detection.
2530 */
2531
2532int ata_cable_80wire(struct ata_port *ap)
2533{
2534 return ATA_CBL_PATA80;
2535}
2536
2537/**
2538 * ata_cable_unknown - return unknown PATA cable.
2539 * @ap: port
2540 *
2541 * Helper method for drivers which have no PATA cable detection.
2542 */
2543
2544int ata_cable_unknown(struct ata_port *ap)
2545{
2546 return ATA_CBL_PATA_UNK;
2547}
2548
2549/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002550 * ata_cable_ignore - return ignored PATA cable.
2551 * @ap: port
2552 *
2553 * Helper method for drivers which don't use cable type to limit
2554 * transfer mode.
2555 */
2556int ata_cable_ignore(struct ata_port *ap)
2557{
2558 return ATA_CBL_PATA_IGN;
2559}
2560
2561/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002562 * ata_cable_sata - return SATA cable type
2563 * @ap: port
2564 *
2565 * Helper method for drivers which have SATA cables
2566 */
2567
2568int ata_cable_sata(struct ata_port *ap)
2569{
2570 return ATA_CBL_SATA;
2571}
2572
2573/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002574 * ata_bus_probe - Reset and probe ATA bus
2575 * @ap: Bus to probe
2576 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002577 * Master ATA bus probing function. Initiates a hardware-dependent
2578 * bus reset, then attempts to identify any devices found on
2579 * the bus.
2580 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002582 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002583 *
2584 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002585 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586 */
2587
Brian King80289162006-08-07 14:27:31 -05002588int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002589{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002590 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002591 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002592 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002593 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594
Tejun Heo28ca5c52006-03-01 16:09:36 +09002595 ata_port_probe(ap);
2596
Tejun Heof58229f2007-08-06 18:36:23 +09002597 ata_link_for_each_dev(dev, &ap->link)
2598 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002599
2600 retry:
Tejun Heocdeab112007-10-29 16:41:09 +09002601 ata_link_for_each_dev(dev, &ap->link) {
2602 /* If we issue an SRST then an ATA drive (not ATAPI)
2603 * may change configuration and be in PIO0 timing. If
2604 * we do a hard reset (or are coming from power on)
2605 * this is true for ATA or ATAPI. Until we've set a
2606 * suitable controller mode we should not touch the
2607 * bus as we may be talking too fast.
2608 */
2609 dev->pio_mode = XFER_PIO_0;
2610
2611 /* If the controller has a pio mode setup function
2612 * then use it to set the chipset to rights. Don't
2613 * touch the DMA setup as that will be dealt with when
2614 * configuring devices.
2615 */
2616 if (ap->ops->set_piomode)
2617 ap->ops->set_piomode(ap, dev);
2618 }
2619
Tejun Heo20444702006-03-13 01:57:01 +09002620 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002621 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002622
Tejun Heof58229f2007-08-06 18:36:23 +09002623 ata_link_for_each_dev(dev, &ap->link) {
Tejun Heo52783c52006-05-31 18:28:22 +09002624 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2625 dev->class != ATA_DEV_UNKNOWN)
2626 classes[dev->devno] = dev->class;
2627 else
2628 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002629
Tejun Heo52783c52006-05-31 18:28:22 +09002630 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002631 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632
Tejun Heo52783c52006-05-31 18:28:22 +09002633 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09002634
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002635 /* read IDENTIFY page and configure devices. We have to do the identify
2636 specific sequence bass-ackwards so that PDIAG- is released by
2637 the slave device */
2638
Bartlomiej Zolnierkiewicza4ba7fe2008-04-02 10:35:15 +09002639 ata_link_for_each_dev_reverse(dev, &ap->link) {
Tejun Heof58229f2007-08-06 18:36:23 +09002640 if (tries[dev->devno])
2641 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002642
Tejun Heoe1211e32006-04-01 01:38:18 +09002643 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002644 continue;
2645
Tejun Heobff04642006-11-10 18:08:10 +09002646 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2647 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002648 if (rc)
2649 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002650 }
2651
Alan Coxbe0d18d2007-03-06 02:37:56 -08002652 /* Now ask for the cable type as PDIAG- should have been released */
2653 if (ap->ops->cable_detect)
2654 ap->cbl = ap->ops->cable_detect(ap);
2655
Alan Cox614fe292007-08-22 23:22:45 +01002656 /* We may have SATA bridge glue hiding here irrespective of the
2657 reported cable types and sensed types */
2658 ata_link_for_each_dev(dev, &ap->link) {
2659 if (!ata_dev_enabled(dev))
2660 continue;
2661 /* SATA drives indicate we have a bridge. We don't know which
2662 end of the link the bridge is which is a problem */
2663 if (ata_id_is_sata(dev->id))
2664 ap->cbl = ATA_CBL_SATA;
2665 }
2666
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002667 /* After the identify sequence we can now set up the devices. We do
2668 this in the normal order so that the user doesn't get confused */
2669
Tejun Heof58229f2007-08-06 18:36:23 +09002670 ata_link_for_each_dev(dev, &ap->link) {
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002671 if (!ata_dev_enabled(dev))
2672 continue;
Tejun Heoffeae412006-03-01 16:09:35 +09002673
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002674 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002675 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002676 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002677 if (rc)
2678 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679 }
2680
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002681 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002682 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002683 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002684 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002685
Tejun Heof58229f2007-08-06 18:36:23 +09002686 ata_link_for_each_dev(dev, &ap->link)
2687 if (ata_dev_enabled(dev))
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002688 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002689
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002690 /* no device present, disable port */
2691 ata_port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09002692 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002693
2694 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002695 tries[dev->devno]--;
2696
Tejun Heo14d2bac2006-04-02 17:54:46 +09002697 switch (rc) {
2698 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002699 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002700 tries[dev->devno] = 0;
2701 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002702
2703 case -ENODEV:
2704 /* give it just one more chance */
2705 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002706 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002707 if (tries[dev->devno] == 1) {
2708 /* This is the last chance, better to slow
2709 * down than lose it.
2710 */
Tejun Heo936fd732007-08-06 18:36:23 +09002711 sata_down_spd_limit(&ap->link);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002712 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2713 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002714 }
2715
Tejun Heo4ae72a12007-02-02 16:22:30 +09002716 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002717 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002718
Tejun Heo14d2bac2006-04-02 17:54:46 +09002719 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720}
2721
2722/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002723 * ata_port_probe - Mark port as enabled
2724 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002726 * Modify @ap data structure such that the system
2727 * thinks that the entire port is enabled.
2728 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002729 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04002730 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 */
2732
2733void ata_port_probe(struct ata_port *ap)
2734{
Tejun Heo198e0fe2006-04-02 18:51:52 +09002735 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002736}
2737
2738/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002739 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002740 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002741 *
2742 * This function prints link speed and status of a SATA link.
2743 *
2744 * LOCKING:
2745 * None.
2746 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002747static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002748{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002749 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002750
Tejun Heo936fd732007-08-06 18:36:23 +09002751 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002752 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002753 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002754
Tejun Heob1c72912008-07-31 17:02:43 +09002755 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002756 tmp = (sstatus >> 4) & 0xf;
Tejun Heo936fd732007-08-06 18:36:23 +09002757 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002758 "SATA link up %s (SStatus %X SControl %X)\n",
2759 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002760 } else {
Tejun Heo936fd732007-08-06 18:36:23 +09002761 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002762 "SATA link down (SStatus %X SControl %X)\n",
2763 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002764 }
2765}
2766
2767/**
Alan Coxebdfca62006-03-23 15:38:34 +00002768 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002769 * @adev: device
2770 *
2771 * Obtain the other device on the same cable, or if none is
2772 * present NULL is returned
2773 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002774
Tejun Heo3373efd2006-05-15 20:57:53 +09002775struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002776{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002777 struct ata_link *link = adev->link;
2778 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002779 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002780 return NULL;
2781 return pair;
2782}
2783
2784/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002785 * ata_port_disable - Disable port.
2786 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002788 * Modify @ap data structure such that the system
2789 * thinks that the entire port is disabled, and should
2790 * never attempt to probe or communicate with devices
2791 * on this port.
2792 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002793 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04002794 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002795 */
2796
2797void ata_port_disable(struct ata_port *ap)
2798{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002799 ap->link.device[0].class = ATA_DEV_NONE;
2800 ap->link.device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09002801 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802}
2803
Tejun Heo1c3fae42006-04-02 20:53:28 +09002804/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002805 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002806 * @link: Link to adjust SATA spd limit for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002807 *
Tejun Heo936fd732007-08-06 18:36:23 +09002808 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002809 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002810 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002811 *
2812 * LOCKING:
2813 * Inherited from caller.
2814 *
2815 * RETURNS:
2816 * 0 on success, negative errno on failure
2817 */
Tejun Heo936fd732007-08-06 18:36:23 +09002818int sata_down_spd_limit(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002819{
Tejun Heo81952c52006-05-15 20:57:47 +09002820 u32 sstatus, spd, mask;
2821 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002822
Tejun Heo936fd732007-08-06 18:36:23 +09002823 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002824 return -EOPNOTSUPP;
2825
2826 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002827 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002828 */
Tejun Heo936fd732007-08-06 18:36:23 +09002829 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo008a7892007-07-16 14:29:40 +09002830 if (rc == 0)
2831 spd = (sstatus >> 4) & 0xf;
2832 else
Tejun Heo936fd732007-08-06 18:36:23 +09002833 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002834
Tejun Heo936fd732007-08-06 18:36:23 +09002835 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002836 if (mask <= 1)
2837 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002838
2839 /* unconditionally mask off the highest bit */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002840 highbit = fls(mask) - 1;
2841 mask &= ~(1 << highbit);
2842
Tejun Heo008a7892007-07-16 14:29:40 +09002843 /* Mask off all speeds higher than or equal to the current
2844 * one. Force 1.5Gbps if current SPD is not available.
2845 */
2846 if (spd > 1)
2847 mask &= (1 << (spd - 1)) - 1;
2848 else
2849 mask &= 1;
2850
2851 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002852 if (!mask)
2853 return -EINVAL;
2854
Tejun Heo936fd732007-08-06 18:36:23 +09002855 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002856
Tejun Heo936fd732007-08-06 18:36:23 +09002857 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002858 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002859
2860 return 0;
2861}
2862
Tejun Heo936fd732007-08-06 18:36:23 +09002863static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002864{
Tejun Heo52702222007-10-31 10:17:07 +09002865 struct ata_link *host_link = &link->ap->link;
2866 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002867
Tejun Heo52702222007-10-31 10:17:07 +09002868 limit = link->sata_spd_limit;
2869
2870 /* Don't configure downstream link faster than upstream link.
2871 * It doesn't speed up anything and some PMPs choke on such
2872 * configuration.
2873 */
2874 if (!ata_is_host_link(link) && host_link->sata_spd)
2875 limit &= (1 << host_link->sata_spd) - 1;
2876
2877 if (limit == UINT_MAX)
2878 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002879 else
Tejun Heo52702222007-10-31 10:17:07 +09002880 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002881
2882 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002883 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002884
Tejun Heo52702222007-10-31 10:17:07 +09002885 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002886}
2887
2888/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002889 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002890 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002891 *
2892 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002893 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002894 * whether hardreset is necessary to apply SATA spd
2895 * configuration.
2896 *
2897 * LOCKING:
2898 * Inherited from caller.
2899 *
2900 * RETURNS:
2901 * 1 if SATA spd configuration is needed, 0 otherwise.
2902 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03002903static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002904{
2905 u32 scontrol;
2906
Tejun Heo936fd732007-08-06 18:36:23 +09002907 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002908 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002909
Tejun Heo936fd732007-08-06 18:36:23 +09002910 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002911}
2912
2913/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002914 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002915 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002916 *
Tejun Heo936fd732007-08-06 18:36:23 +09002917 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002918 *
2919 * LOCKING:
2920 * Inherited from caller.
2921 *
2922 * RETURNS:
2923 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002924 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002925 */
Tejun Heo936fd732007-08-06 18:36:23 +09002926int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002927{
2928 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002929 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002930
Tejun Heo936fd732007-08-06 18:36:23 +09002931 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002932 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002933
Tejun Heo936fd732007-08-06 18:36:23 +09002934 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002935 return 0;
2936
Tejun Heo936fd732007-08-06 18:36:23 +09002937 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002938 return rc;
2939
Tejun Heo1c3fae42006-04-02 20:53:28 +09002940 return 1;
2941}
2942
Alan Cox452503f2005-10-21 19:01:32 -04002943/*
2944 * This mode timing computation functionality is ported over from
2945 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2946 */
2947/*
Alan Coxb352e572006-08-10 18:52:12 +01002948 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002949 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002950 * for UDMA6, which is currently supported only by Maxtor drives.
2951 *
2952 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002953 */
2954
2955static const struct ata_timing ata_timing[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +09002956/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2957 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2958 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2959 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2960 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2961 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2962 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2963 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002964
Tejun Heo70cd0712007-11-27 19:43:40 +09002965 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2966 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2967 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002968
Tejun Heo70cd0712007-11-27 19:43:40 +09002969 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2970 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2971 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
Alan Coxb352e572006-08-10 18:52:12 +01002972 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Tejun Heo70cd0712007-11-27 19:43:40 +09002973 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002974
2975/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Tejun Heo70cd0712007-11-27 19:43:40 +09002976 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2977 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2978 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2979 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2980 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2981 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2982 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002983
2984 { 0xFF }
2985};
2986
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002987#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2988#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002989
2990static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2991{
2992 q->setup = EZ(t->setup * 1000, T);
2993 q->act8b = EZ(t->act8b * 1000, T);
2994 q->rec8b = EZ(t->rec8b * 1000, T);
2995 q->cyc8b = EZ(t->cyc8b * 1000, T);
2996 q->active = EZ(t->active * 1000, T);
2997 q->recover = EZ(t->recover * 1000, T);
2998 q->cycle = EZ(t->cycle * 1000, T);
2999 q->udma = EZ(t->udma * 1000, UT);
3000}
3001
3002void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
3003 struct ata_timing *m, unsigned int what)
3004{
3005 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
3006 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3007 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3008 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3009 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3010 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
3011 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3012 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3013}
3014
Tejun Heo63573572007-11-27 19:43:39 +09003015const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04003016{
Tejun Heo70cd0712007-11-27 19:43:40 +09003017 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04003018
Tejun Heo70cd0712007-11-27 19:43:40 +09003019 while (xfer_mode > t->mode)
3020 t++;
3021
3022 if (xfer_mode == t->mode)
3023 return t;
3024 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04003025}
3026
3027int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3028 struct ata_timing *t, int T, int UT)
3029{
3030 const struct ata_timing *s;
3031 struct ata_timing p;
3032
3033 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003034 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08003035 */
Alan Cox452503f2005-10-21 19:01:32 -04003036
3037 if (!(s = ata_timing_find_mode(speed)))
3038 return -EINVAL;
3039
Albert Lee75b1f2f2005-11-16 17:06:18 +08003040 memcpy(t, s, sizeof(*s));
3041
Alan Cox452503f2005-10-21 19:01:32 -04003042 /*
3043 * If the drive is an EIDE drive, it can tell us it needs extended
3044 * PIO/MW_DMA cycle timing.
3045 */
3046
3047 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3048 memset(&p, 0, sizeof(p));
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003049 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
Alan Cox452503f2005-10-21 19:01:32 -04003050 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
3051 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003052 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
Alan Cox452503f2005-10-21 19:01:32 -04003053 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
3054 }
3055 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3056 }
3057
3058 /*
3059 * Convert the timing to bus clock counts.
3060 */
3061
Albert Lee75b1f2f2005-11-16 17:06:18 +08003062 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04003063
3064 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003065 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3066 * S.M.A.R.T * and some other commands. We have to ensure that the
3067 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04003068 */
3069
Alanfd3367a2006-12-07 12:41:18 +00003070 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04003071 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3072 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3073 }
3074
3075 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003076 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04003077 */
3078
3079 if (t->act8b + t->rec8b < t->cyc8b) {
3080 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3081 t->rec8b = t->cyc8b - t->act8b;
3082 }
3083
3084 if (t->active + t->recover < t->cycle) {
3085 t->active += (t->cycle - (t->active + t->recover)) / 2;
3086 t->recover = t->cycle - t->active;
3087 }
Jeff Garzika617c092007-05-21 20:14:23 -04003088
Alan Cox4f701d12007-04-23 11:55:36 +01003089 /* In a few cases quantisation may produce enough errors to
3090 leave t->cycle too low for the sum of active and recovery
3091 if so we must correct this */
3092 if (t->active + t->recover > t->cycle)
3093 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04003094
3095 return 0;
3096}
3097
Tejun Heocf176e12006-04-02 17:54:46 +09003098/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09003099 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3100 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3101 * @cycle: cycle duration in ns
3102 *
3103 * Return matching xfer mode for @cycle. The returned mode is of
3104 * the transfer type specified by @xfer_shift. If @cycle is too
3105 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3106 * than the fastest known mode, the fasted mode is returned.
3107 *
3108 * LOCKING:
3109 * None.
3110 *
3111 * RETURNS:
3112 * Matching xfer_mode, 0xff if no match found.
3113 */
3114u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3115{
3116 u8 base_mode = 0xff, last_mode = 0xff;
3117 const struct ata_xfer_ent *ent;
3118 const struct ata_timing *t;
3119
3120 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3121 if (ent->shift == xfer_shift)
3122 base_mode = ent->base;
3123
3124 for (t = ata_timing_find_mode(base_mode);
3125 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3126 unsigned short this_cycle;
3127
3128 switch (xfer_shift) {
3129 case ATA_SHIFT_PIO:
3130 case ATA_SHIFT_MWDMA:
3131 this_cycle = t->cycle;
3132 break;
3133 case ATA_SHIFT_UDMA:
3134 this_cycle = t->udma;
3135 break;
3136 default:
3137 return 0xff;
3138 }
3139
3140 if (cycle > this_cycle)
3141 break;
3142
3143 last_mode = t->mode;
3144 }
3145
3146 return last_mode;
3147}
3148
3149/**
Tejun Heocf176e12006-04-02 17:54:46 +09003150 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003151 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003152 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003153 *
3154 * Adjust xfer masks of @dev downward. Note that this function
3155 * does not apply the change. Invoking ata_set_mode() afterwards
3156 * will apply the limit.
3157 *
3158 * LOCKING:
3159 * Inherited from caller.
3160 *
3161 * RETURNS:
3162 * 0 on success, negative errno on failure
3163 */
Tejun Heo458337d2007-02-02 16:22:30 +09003164int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003165{
Tejun Heo458337d2007-02-02 16:22:30 +09003166 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003167 unsigned long orig_mask, xfer_mask;
3168 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003169 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003170
Tejun Heo458337d2007-02-02 16:22:30 +09003171 quiet = !!(sel & ATA_DNXFER_QUIET);
3172 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003173
Tejun Heo458337d2007-02-02 16:22:30 +09003174 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3175 dev->mwdma_mask,
3176 dev->udma_mask);
3177 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003178
Tejun Heo458337d2007-02-02 16:22:30 +09003179 switch (sel) {
3180 case ATA_DNXFER_PIO:
3181 highbit = fls(pio_mask) - 1;
3182 pio_mask &= ~(1 << highbit);
3183 break;
3184
3185 case ATA_DNXFER_DMA:
3186 if (udma_mask) {
3187 highbit = fls(udma_mask) - 1;
3188 udma_mask &= ~(1 << highbit);
3189 if (!udma_mask)
3190 return -ENOENT;
3191 } else if (mwdma_mask) {
3192 highbit = fls(mwdma_mask) - 1;
3193 mwdma_mask &= ~(1 << highbit);
3194 if (!mwdma_mask)
3195 return -ENOENT;
3196 }
3197 break;
3198
3199 case ATA_DNXFER_40C:
3200 udma_mask &= ATA_UDMA_MASK_40C;
3201 break;
3202
3203 case ATA_DNXFER_FORCE_PIO0:
3204 pio_mask &= 1;
3205 case ATA_DNXFER_FORCE_PIO:
3206 mwdma_mask = 0;
3207 udma_mask = 0;
3208 break;
3209
Tejun Heo458337d2007-02-02 16:22:30 +09003210 default:
3211 BUG();
3212 }
3213
3214 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3215
3216 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3217 return -ENOENT;
3218
3219 if (!quiet) {
3220 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3221 snprintf(buf, sizeof(buf), "%s:%s",
3222 ata_mode_string(xfer_mask),
3223 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3224 else
3225 snprintf(buf, sizeof(buf), "%s",
3226 ata_mode_string(xfer_mask));
3227
3228 ata_dev_printk(dev, KERN_WARNING,
3229 "limiting speed to %s\n", buf);
3230 }
Tejun Heocf176e12006-04-02 17:54:46 +09003231
3232 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3233 &dev->udma_mask);
3234
Tejun Heocf176e12006-04-02 17:54:46 +09003235 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003236}
3237
Tejun Heo3373efd2006-05-15 20:57:53 +09003238static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003239{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003240 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo4055dee2008-02-07 10:34:08 +09003241 const char *dev_err_whine = "";
3242 int ign_dev_err = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003243 unsigned int err_mask;
3244 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245
Tejun Heoe8384602006-04-02 18:51:53 +09003246 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247 if (dev->xfer_shift == ATA_SHIFT_PIO)
3248 dev->flags |= ATA_DFLAG_PIO;
3249
Tejun Heo3373efd2006-05-15 20:57:53 +09003250 err_mask = ata_dev_set_xfermode(dev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003251
Tejun Heo4055dee2008-02-07 10:34:08 +09003252 if (err_mask & ~AC_ERR_DEV)
3253 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003254
Tejun Heo4055dee2008-02-07 10:34:08 +09003255 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003256 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003257 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003258 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003259 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003260 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003261
Alan Coxb93fda12008-04-08 16:36:44 +01003262 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3263 /* Old CFA may refuse this command, which is just fine */
3264 if (ata_id_is_cfa(dev->id))
3265 ign_dev_err = 1;
3266 /* Catch several broken garbage emulations plus some pre
3267 ATA devices */
3268 if (ata_id_major_version(dev->id) == 0 &&
3269 dev->pio_mode <= XFER_PIO_2)
3270 ign_dev_err = 1;
3271 /* Some very old devices and some bad newer ones fail
3272 any kind of SET_XFERMODE request but support PIO0-2
3273 timings and no IORDY */
3274 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3275 ign_dev_err = 1;
3276 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003277 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3278 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3279 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3280 dev->dma_mode == XFER_MW_DMA_0 &&
3281 (dev->id[63] >> 8) & 1)
3282 ign_dev_err = 1;
3283
3284 /* if the device is actually configured correctly, ignore dev err */
3285 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3286 ign_dev_err = 1;
3287
3288 if (err_mask & AC_ERR_DEV) {
3289 if (!ign_dev_err)
3290 goto fail;
3291 else
3292 dev_err_whine = " (device error ignored)";
3293 }
3294
Tejun Heo23e71c32006-03-06 04:31:57 +09003295 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3296 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003297
Tejun Heo4055dee2008-02-07 10:34:08 +09003298 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3299 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3300 dev_err_whine);
3301
Tejun Heo83206a22006-03-24 15:25:31 +09003302 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003303
3304 fail:
3305 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3306 "(err_mask=0x%x)\n", err_mask);
3307 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003308}
3309
Linus Torvalds1da177e2005-04-16 15:20:36 -07003310/**
Alan04351822007-03-06 02:37:52 -08003311 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003312 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003313 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003314 *
Alan04351822007-03-06 02:37:52 -08003315 * Standard implementation of the function used to tune and set
3316 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3317 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003318 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003319 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003320 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003321 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003322 *
3323 * RETURNS:
3324 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325 */
Alan04351822007-03-06 02:37:52 -08003326
Tejun Heo02607312007-08-06 18:36:23 +09003327int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003328{
Tejun Heo02607312007-08-06 18:36:23 +09003329 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003330 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003331 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003332
Tejun Heoa6d5a512006-03-06 04:31:57 +09003333 /* step 1: calculate xfer_mask */
Tejun Heof58229f2007-08-06 18:36:23 +09003334 ata_link_for_each_dev(dev, link) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003335 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003336 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003337
Tejun Heoe1211e32006-04-01 01:38:18 +09003338 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09003339 continue;
3340
Alan Coxb3a70602007-10-02 12:38:26 -04003341 mode_mask = ATA_DMA_MASK_ATA;
3342 if (dev->class == ATA_DEV_ATAPI)
3343 mode_mask = ATA_DMA_MASK_ATAPI;
3344 else if (ata_id_is_cfa(dev->id))
3345 mode_mask = ATA_DMA_MASK_CFA;
3346
Tejun Heo3373efd2006-05-15 20:57:53 +09003347 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003348 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003349
Tejun Heoacf356b2006-03-24 14:07:50 +09003350 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3351 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003352
3353 if (libata_dma_mask & mode_mask)
3354 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3355 else
3356 dma_mask = 0;
3357
Tejun Heoacf356b2006-03-24 14:07:50 +09003358 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3359 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003360
Tejun Heo4f659772006-04-01 01:38:18 +09003361 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003362 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003363 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003364 }
Tejun Heo4f659772006-04-01 01:38:18 +09003365 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003366 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003367
3368 /* step 2: always set host PIO timings */
Tejun Heof58229f2007-08-06 18:36:23 +09003369 ata_link_for_each_dev(dev, link) {
Tejun Heoe8e06192006-04-01 01:38:18 +09003370 if (!ata_dev_enabled(dev))
3371 continue;
3372
Tejun Heo70cd0712007-11-27 19:43:40 +09003373 if (dev->pio_mode == 0xff) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003374 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003375 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003376 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003377 }
3378
3379 dev->xfer_mode = dev->pio_mode;
3380 dev->xfer_shift = ATA_SHIFT_PIO;
3381 if (ap->ops->set_piomode)
3382 ap->ops->set_piomode(ap, dev);
3383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003384
Tejun Heoa6d5a512006-03-06 04:31:57 +09003385 /* step 3: set host DMA timings */
Tejun Heof58229f2007-08-06 18:36:23 +09003386 ata_link_for_each_dev(dev, link) {
Alan Coxb15b3eb2008-08-01 09:18:34 +01003387 if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003388 continue;
3389
3390 dev->xfer_mode = dev->dma_mode;
3391 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3392 if (ap->ops->set_dmamode)
3393 ap->ops->set_dmamode(ap, dev);
3394 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395
3396 /* step 4: update devices' xfer mode */
Tejun Heof58229f2007-08-06 18:36:23 +09003397 ata_link_for_each_dev(dev, link) {
Alan18d90de2007-01-24 11:42:38 +00003398 /* don't update suspended devices' xfer mode */
Tejun Heo9666f402007-05-04 21:27:47 +02003399 if (!ata_dev_enabled(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09003400 continue;
3401
Tejun Heo3373efd2006-05-15 20:57:53 +09003402 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003403 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003404 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003406
Tejun Heoe8e06192006-04-01 01:38:18 +09003407 /* Record simplex status. If we selected DMA then the other
3408 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003409 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003410 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003411 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003412
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003413 out:
3414 if (rc)
3415 *r_failed_dev = dev;
3416 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417}
3418
3419/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003420 * ata_wait_ready - wait for link to become ready
3421 * @link: link to be waited on
3422 * @deadline: deadline jiffies for the operation
3423 * @check_ready: callback to check link readiness
3424 *
3425 * Wait for @link to become ready. @check_ready should return
3426 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3427 * link doesn't seem to be occupied, other errno for other error
3428 * conditions.
3429 *
3430 * Transient -ENODEV conditions are allowed for
3431 * ATA_TMOUT_FF_WAIT.
3432 *
3433 * LOCKING:
3434 * EH context.
3435 *
3436 * RETURNS:
3437 * 0 if @linke is ready before @deadline; otherwise, -errno.
3438 */
3439int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3440 int (*check_ready)(struct ata_link *link))
3441{
3442 unsigned long start = jiffies;
Tejun Heo341c2c92008-05-20 02:17:51 +09003443 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003444 int warned = 0;
3445
Tejun Heob1c72912008-07-31 17:02:43 +09003446 /* Slave readiness can't be tested separately from master. On
3447 * M/S emulation configuration, this function should be called
3448 * only on the master and it will handle both master and slave.
3449 */
3450 WARN_ON(link == link->ap->slave_link);
3451
Tejun Heoaa2731a2008-04-07 22:47:19 +09003452 if (time_after(nodev_deadline, deadline))
3453 nodev_deadline = deadline;
3454
3455 while (1) {
3456 unsigned long now = jiffies;
3457 int ready, tmp;
3458
3459 ready = tmp = check_ready(link);
3460 if (ready > 0)
3461 return 0;
3462
3463 /* -ENODEV could be transient. Ignore -ENODEV if link
3464 * is online. Also, some SATA devices take a long
3465 * time to clear 0xff after reset. For example,
3466 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3467 * GoVault needs even more than that. Wait for
3468 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3469 *
3470 * Note that some PATA controllers (pata_ali) explode
3471 * if status register is read more than once when
3472 * there's no device attached.
3473 */
3474 if (ready == -ENODEV) {
3475 if (ata_link_online(link))
3476 ready = 0;
3477 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3478 !ata_link_offline(link) &&
3479 time_before(now, nodev_deadline))
3480 ready = 0;
3481 }
3482
3483 if (ready)
3484 return ready;
3485 if (time_after(now, deadline))
3486 return -EBUSY;
3487
3488 if (!warned && time_after(now, start + 5 * HZ) &&
3489 (deadline - now > 3 * HZ)) {
3490 ata_link_printk(link, KERN_WARNING,
3491 "link is slow to respond, please be patient "
3492 "(ready=%d)\n", tmp);
3493 warned = 1;
3494 }
3495
3496 msleep(50);
3497 }
3498}
3499
3500/**
3501 * ata_wait_after_reset - wait for link to become ready after reset
3502 * @link: link to be waited on
3503 * @deadline: deadline jiffies for the operation
3504 * @check_ready: callback to check link readiness
3505 *
3506 * Wait for @link to become ready after reset.
3507 *
3508 * LOCKING:
3509 * EH context.
3510 *
3511 * RETURNS:
3512 * 0 if @linke is ready before @deadline; otherwise, -errno.
3513 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003514int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003515 int (*check_ready)(struct ata_link *link))
3516{
Tejun Heo341c2c92008-05-20 02:17:51 +09003517 msleep(ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003518
3519 return ata_wait_ready(link, deadline, check_ready);
3520}
3521
3522/**
Tejun Heo936fd732007-08-06 18:36:23 +09003523 * sata_link_debounce - debounce SATA phy status
3524 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003525 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003526 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003527 *
Tejun Heo936fd732007-08-06 18:36:23 +09003528* Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003529 * holding the same value where DET is not 1 for @duration polled
3530 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003531 * beginning of the stable state. Because DET gets stuck at 1 on
3532 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003533 * until timeout then returns 0 if DET is stable at 1.
3534 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003535 * @timeout is further limited by @deadline. The sooner of the
3536 * two is used.
3537 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003538 * LOCKING:
3539 * Kernel thread context (may sleep)
3540 *
3541 * RETURNS:
3542 * 0 on success, -errno on failure.
3543 */
Tejun Heo936fd732007-08-06 18:36:23 +09003544int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3545 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003546{
Tejun Heo341c2c92008-05-20 02:17:51 +09003547 unsigned long interval = params[0];
3548 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003549 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003550 u32 last, cur;
3551 int rc;
3552
Tejun Heo341c2c92008-05-20 02:17:51 +09003553 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003554 if (time_before(t, deadline))
3555 deadline = t;
3556
Tejun Heo936fd732007-08-06 18:36:23 +09003557 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003558 return rc;
3559 cur &= 0xf;
3560
3561 last = cur;
3562 last_jiffies = jiffies;
3563
3564 while (1) {
Tejun Heo341c2c92008-05-20 02:17:51 +09003565 msleep(interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003566 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003567 return rc;
3568 cur &= 0xf;
3569
3570 /* DET stable? */
3571 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003572 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003573 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003574 if (time_after(jiffies,
3575 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003576 return 0;
3577 continue;
3578 }
3579
3580 /* unstable, start over */
3581 last = cur;
3582 last_jiffies = jiffies;
3583
Tejun Heof1545152007-07-16 14:29:40 +09003584 /* Check deadline. If debouncing failed, return
3585 * -EPIPE to tell upper layer to lower link speed.
3586 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003587 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003588 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003589 }
3590}
3591
3592/**
Tejun Heo936fd732007-08-06 18:36:23 +09003593 * sata_link_resume - resume SATA link
3594 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003595 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003596 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003597 *
Tejun Heo936fd732007-08-06 18:36:23 +09003598 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003599 *
3600 * LOCKING:
3601 * Kernel thread context (may sleep)
3602 *
3603 * RETURNS:
3604 * 0 on success, -errno on failure.
3605 */
Tejun Heo936fd732007-08-06 18:36:23 +09003606int sata_link_resume(struct ata_link *link, const unsigned long *params,
3607 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003608{
Tejun Heoac371982008-04-07 22:47:19 +09003609 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003610 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003611
Tejun Heo936fd732007-08-06 18:36:23 +09003612 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003613 return rc;
3614
Tejun Heo852ee162006-04-01 01:38:18 +09003615 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09003616
Tejun Heo936fd732007-08-06 18:36:23 +09003617 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003618 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003619
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003620 /* Some PHYs react badly if SStatus is pounded immediately
3621 * after resuming. Delay 200ms before debouncing.
3622 */
3623 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003624
Tejun Heoac371982008-04-07 22:47:19 +09003625 if ((rc = sata_link_debounce(link, params, deadline)))
3626 return rc;
3627
Tejun Heof0465192008-05-19 01:15:08 +09003628 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003629 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3630 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003631
Tejun Heof0465192008-05-19 01:15:08 +09003632 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003633}
3634
Tejun Heof5914a42006-05-31 18:27:48 +09003635/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003636 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003637 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003638 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003639 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003640 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003641 * prereset makes libata abort whole reset sequence and give up
3642 * that port, so prereset should be best-effort. It does its
3643 * best to prepare for reset sequence but if things go wrong, it
3644 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003645 *
3646 * LOCKING:
3647 * Kernel thread context (may sleep)
3648 *
3649 * RETURNS:
3650 * 0 on success, -errno otherwise.
3651 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003652int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003653{
Tejun Heocc0680a2007-08-06 18:36:23 +09003654 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003655 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003656 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003657 int rc;
3658
Tejun Heof5914a42006-05-31 18:27:48 +09003659 /* if we're about to do hardreset, nothing more to do */
3660 if (ehc->i.action & ATA_EH_HARDRESET)
3661 return 0;
3662
Tejun Heo936fd732007-08-06 18:36:23 +09003663 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003664 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003665 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003666 /* whine about phy resume failure but proceed */
3667 if (rc && rc != -EOPNOTSUPP)
Tejun Heocc0680a2007-08-06 18:36:23 +09003668 ata_link_printk(link, KERN_WARNING, "failed to resume "
Tejun Heof5914a42006-05-31 18:27:48 +09003669 "link for reset (errno=%d)\n", rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003670 }
3671
Tejun Heo45db2f62008-04-08 01:46:56 +09003672 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003673 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003674 ehc->i.action &= ~ATA_EH_SOFTRESET;
3675
Tejun Heof5914a42006-05-31 18:27:48 +09003676 return 0;
3677}
3678
Tejun Heoc2bd5802006-01-24 17:05:22 +09003679/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003680 * sata_link_hardreset - reset link via SATA phy reset
3681 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003682 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003683 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003684 * @online: optional out parameter indicating link onlineness
3685 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003686 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003687 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003688 * After hardreset, link readiness is waited upon using
3689 * ata_wait_ready() if @check_ready is specified. LLDs are
3690 * allowed to not specify @check_ready and wait itself after this
3691 * function returns. Device classification is LLD's
3692 * responsibility.
3693 *
3694 * *@online is set to one iff reset succeeded and @link is online
3695 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003696 *
3697 * LOCKING:
3698 * Kernel thread context (may sleep)
3699 *
3700 * RETURNS:
3701 * 0 on success, -errno otherwise.
3702 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003703int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003704 unsigned long deadline,
3705 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003706{
Tejun Heo852ee162006-04-01 01:38:18 +09003707 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003708 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003709
Tejun Heoc2bd5802006-01-24 17:05:22 +09003710 DPRINTK("ENTER\n");
3711
Tejun Heo9dadd452008-04-07 22:47:19 +09003712 if (online)
3713 *online = false;
3714
Tejun Heo936fd732007-08-06 18:36:23 +09003715 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003716 /* SATA spec says nothing about how to reconfigure
3717 * spd. To be on the safe side, turn off phy during
3718 * reconfiguration. This works for at least ICH7 AHCI
3719 * and Sil3124.
3720 */
Tejun Heo936fd732007-08-06 18:36:23 +09003721 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003722 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003723
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003724 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003725
Tejun Heo936fd732007-08-06 18:36:23 +09003726 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003727 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003728
Tejun Heo936fd732007-08-06 18:36:23 +09003729 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003730 }
3731
3732 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003733 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003734 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003735
Tejun Heo852ee162006-04-01 01:38:18 +09003736 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003737
Tejun Heo936fd732007-08-06 18:36:23 +09003738 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003739 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003740
Tejun Heo1c3fae42006-04-02 20:53:28 +09003741 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003742 * 10.4.2 says at least 1 ms.
3743 */
3744 msleep(1);
3745
Tejun Heo936fd732007-08-06 18:36:23 +09003746 /* bring link back */
3747 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003748 if (rc)
3749 goto out;
3750 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003751 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003752 goto out;
3753
3754 /* Link is online. From this point, -ENODEV too is an error. */
3755 if (online)
3756 *online = true;
3757
Tejun Heo071f44b2008-04-07 22:47:22 +09003758 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003759 /* If PMP is supported, we have to do follow-up SRST.
3760 * Some PMPs don't send D2H Reg FIS after hardreset if
3761 * the first port is empty. Wait only for
3762 * ATA_TMOUT_PMP_SRST_WAIT.
3763 */
3764 if (check_ready) {
3765 unsigned long pmp_deadline;
3766
Tejun Heo341c2c92008-05-20 02:17:51 +09003767 pmp_deadline = ata_deadline(jiffies,
3768 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003769 if (time_after(pmp_deadline, deadline))
3770 pmp_deadline = deadline;
3771 ata_wait_ready(link, pmp_deadline, check_ready);
3772 }
3773 rc = -EAGAIN;
3774 goto out;
3775 }
3776
3777 rc = 0;
3778 if (check_ready)
3779 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003780 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003781 if (rc && rc != -EAGAIN) {
3782 /* online is set iff link is online && reset succeeded */
3783 if (online)
3784 *online = false;
Tejun Heo9dadd452008-04-07 22:47:19 +09003785 ata_link_printk(link, KERN_ERR,
3786 "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003787 }
Tejun Heob6103f62006-11-01 17:59:53 +09003788 DPRINTK("EXIT, rc=%d\n", rc);
3789 return rc;
3790}
3791
3792/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003793 * sata_std_hardreset - COMRESET w/o waiting or classification
3794 * @link: link to reset
3795 * @class: resulting class of attached device
3796 * @deadline: deadline jiffies for the operation
3797 *
3798 * Standard SATA COMRESET w/o waiting or classification.
3799 *
3800 * LOCKING:
3801 * Kernel thread context (may sleep)
3802 *
3803 * RETURNS:
3804 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3805 */
3806int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3807 unsigned long deadline)
3808{
3809 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3810 bool online;
3811 int rc;
3812
3813 /* do hardreset */
3814 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003815 return online ? -EAGAIN : rc;
3816}
3817
3818/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003819 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003820 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003821 * @classes: classes of attached devices
3822 *
3823 * This function is invoked after a successful reset. Note that
3824 * the device might have been reset more than once using
3825 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003826 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003827 * LOCKING:
3828 * Kernel thread context (may sleep)
3829 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003830void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003831{
Tejun Heof0465192008-05-19 01:15:08 +09003832 u32 serror;
3833
Tejun Heoc2bd5802006-01-24 17:05:22 +09003834 DPRINTK("ENTER\n");
3835
Tejun Heof0465192008-05-19 01:15:08 +09003836 /* reset complete, clear SError */
3837 if (!sata_scr_read(link, SCR_ERROR, &serror))
3838 sata_scr_write(link, SCR_ERROR, serror);
3839
Tejun Heoc2bd5802006-01-24 17:05:22 +09003840 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003841 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003842
Tejun Heoc2bd5802006-01-24 17:05:22 +09003843 DPRINTK("EXIT\n");
3844}
3845
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003846/**
Tejun Heo623a3122006-03-05 17:55:58 +09003847 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003848 * @dev: device to compare against
3849 * @new_class: class of the new device
3850 * @new_id: IDENTIFY page of the new device
3851 *
3852 * Compare @new_class and @new_id against @dev and determine
3853 * whether @dev is the device indicated by @new_class and
3854 * @new_id.
3855 *
3856 * LOCKING:
3857 * None.
3858 *
3859 * RETURNS:
3860 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3861 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003862static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3863 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003864{
3865 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003866 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3867 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003868
3869 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003870 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3871 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003872 return 0;
3873 }
3874
Tejun Heoa0cf7332007-01-02 20:18:49 +09003875 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3876 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3877 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3878 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003879
3880 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003881 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3882 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003883 return 0;
3884 }
3885
3886 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003887 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3888 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003889 return 0;
3890 }
3891
Tejun Heo623a3122006-03-05 17:55:58 +09003892 return 1;
3893}
3894
3895/**
Tejun Heofe309112007-05-15 03:28:15 +09003896 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003897 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003898 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003899 *
3900 * Re-read IDENTIFY page and make sure @dev is still attached to
3901 * the port.
3902 *
3903 * LOCKING:
3904 * Kernel thread context (may sleep)
3905 *
3906 * RETURNS:
3907 * 0 on success, negative errno otherwise
3908 */
Tejun Heofe309112007-05-15 03:28:15 +09003909int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003910{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003911 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003912 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003913 int rc;
3914
Tejun Heofe635c72006-05-15 20:57:35 +09003915 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003916 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003917 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003918 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003919
3920 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003921 if (!ata_dev_same_device(dev, class, id))
3922 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003923
Tejun Heofe635c72006-05-15 20:57:35 +09003924 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003925 return 0;
3926}
3927
3928/**
3929 * ata_dev_revalidate - Revalidate ATA device
3930 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09003931 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09003932 * @readid_flags: read ID flags
3933 *
3934 * Re-read IDENTIFY page, make sure @dev is still attached to the
3935 * port and reconfigure it according to the new IDENTIFY page.
3936 *
3937 * LOCKING:
3938 * Kernel thread context (may sleep)
3939 *
3940 * RETURNS:
3941 * 0 on success, negative errno otherwise
3942 */
Tejun Heo422c9da2007-09-23 13:14:12 +09003943int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3944 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09003945{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003946 u64 n_sectors = dev->n_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003947 int rc;
3948
3949 if (!ata_dev_enabled(dev))
3950 return -ENODEV;
3951
Tejun Heo422c9da2007-09-23 13:14:12 +09003952 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3953 if (ata_class_enabled(new_class) &&
3954 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
3955 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
3956 dev->class, new_class);
3957 rc = -ENODEV;
3958 goto fail;
3959 }
3960
Tejun Heofe309112007-05-15 03:28:15 +09003961 /* re-read ID */
3962 rc = ata_dev_reread_id(dev, readid_flags);
3963 if (rc)
3964 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09003965
3966 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003967 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003968 if (rc)
3969 goto fail;
3970
3971 /* verify n_sectors hasn't changed */
Tejun Heob54eebd2007-08-17 18:46:51 +09003972 if (dev->class == ATA_DEV_ATA && n_sectors &&
3973 dev->n_sectors != n_sectors) {
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003974 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3975 "%llu != %llu\n",
3976 (unsigned long long)n_sectors,
3977 (unsigned long long)dev->n_sectors);
Tejun Heo8270bec2007-08-16 03:02:22 +09003978
3979 /* restore original n_sectors */
3980 dev->n_sectors = n_sectors;
3981
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003982 rc = -ENODEV;
3983 goto fail;
3984 }
3985
3986 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09003987
3988 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09003989 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09003990 return rc;
3991}
3992
Alan Cox6919a0a2006-10-27 19:08:46 -07003993struct ata_blacklist_entry {
3994 const char *model_num;
3995 const char *model_rev;
3996 unsigned long horkage;
3997};
3998
3999static const struct ata_blacklist_entry ata_device_blacklist [] = {
4000 /* Devices with DMA related problems under Linux */
4001 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4002 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4003 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4004 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4005 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4006 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4007 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4008 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4009 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4010 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4011 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4012 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4013 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4014 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4015 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4016 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4017 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4018 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4019 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4020 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4021 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4022 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4023 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4024 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4025 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4026 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004027 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4028 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004029 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004030 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004031 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004032 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004033
Albert Lee18d6e9d2007-04-02 11:34:15 +08004034 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004035 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004036 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004037
Alan Cox6919a0a2006-10-27 19:08:46 -07004038 /* Devices we expect to fail diagnostics */
4039
4040 /* Devices where NCQ should be avoided */
4041 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004042 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004043 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004044 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4045 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004046 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004047 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004048 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004049 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004050 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004051
Tejun Heoac70a962008-11-27 13:36:48 +09004052 /* Seagate NCQ + FLUSH CACHE firmware bug */
Tejun Heod10d4912008-12-11 13:42:42 +09004053 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004054 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004055 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004056 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004057 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004058 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004059 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004060 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004061 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004062 ATA_HORKAGE_FIRMWARE_WARN },
Tejun Heod10d4912008-12-11 13:42:42 +09004063
4064 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ |
4065 ATA_HORKAGE_FIRMWARE_WARN },
4066 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ |
4067 ATA_HORKAGE_FIRMWARE_WARN },
4068 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ |
4069 ATA_HORKAGE_FIRMWARE_WARN },
4070 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ |
4071 ATA_HORKAGE_FIRMWARE_WARN },
4072 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ |
4073 ATA_HORKAGE_FIRMWARE_WARN },
4074
4075 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ |
4076 ATA_HORKAGE_FIRMWARE_WARN },
4077 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ |
4078 ATA_HORKAGE_FIRMWARE_WARN },
4079 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ |
4080 ATA_HORKAGE_FIRMWARE_WARN },
4081 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ |
4082 ATA_HORKAGE_FIRMWARE_WARN },
4083 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ |
4084 ATA_HORKAGE_FIRMWARE_WARN },
4085
4086 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ |
4087 ATA_HORKAGE_FIRMWARE_WARN },
4088 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ |
4089 ATA_HORKAGE_FIRMWARE_WARN },
4090 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ |
4091 ATA_HORKAGE_FIRMWARE_WARN },
4092 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ |
4093 ATA_HORKAGE_FIRMWARE_WARN },
4094 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ |
4095 ATA_HORKAGE_FIRMWARE_WARN },
4096
4097 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ |
4098 ATA_HORKAGE_FIRMWARE_WARN },
4099 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ |
4100 ATA_HORKAGE_FIRMWARE_WARN },
4101 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ |
4102 ATA_HORKAGE_FIRMWARE_WARN },
4103 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ |
4104 ATA_HORKAGE_FIRMWARE_WARN },
4105 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ |
4106 ATA_HORKAGE_FIRMWARE_WARN },
4107
4108 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ |
4109 ATA_HORKAGE_FIRMWARE_WARN },
4110 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ |
4111 ATA_HORKAGE_FIRMWARE_WARN },
4112 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ |
4113 ATA_HORKAGE_FIRMWARE_WARN },
4114 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ |
4115 ATA_HORKAGE_FIRMWARE_WARN },
4116 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ |
Tejun Heoac70a962008-11-27 13:36:48 +09004117 ATA_HORKAGE_FIRMWARE_WARN },
4118
Robert Hancock36e337d2007-04-02 22:05:29 -06004119 /* Blacklist entries taken from Silicon Image 3124/3132
4120 Windows driver .inf file - also several Linux problem reports */
4121 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4122 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4123 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004124
Tejun Heo16c55b02007-08-29 11:58:33 +09004125 /* devices which puke on READ_NATIVE_MAX */
4126 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4127 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4128 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4129 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004130
Alan Cox93328e12007-09-29 04:06:48 -04004131 /* Devices which report 1 sector over size HPA */
4132 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4133 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004134 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004135
Alan Cox6bbfd532007-11-05 22:58:58 +00004136 /* Devices which get the IVB wrong */
4137 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004138 /* Maybe we should just blacklist TSSTcorp... */
4139 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4140 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004141 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
Peter Missele9f33402007-11-27 18:04:42 +01004142 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4143 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4144 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004145
Jens Axboe9ce8e302008-08-27 15:23:18 +02004146 /* Devices that do not need bridging limits applied */
4147 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4148
Alan Cox6919a0a2006-10-27 19:08:46 -07004149 /* End Marker */
4150 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004151};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004152
Adrian Bunk741b7762007-10-24 18:23:06 +02004153static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004154{
4155 const char *p;
4156 int len;
4157
4158 /*
4159 * check for trailing wildcard: *\0
4160 */
4161 p = strchr(patt, wildchar);
4162 if (p && ((*(p + 1)) == 0))
4163 len = p - patt;
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004164 else {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004165 len = strlen(name);
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004166 if (!len) {
4167 if (!*patt)
4168 return 0;
4169 return -1;
4170 }
4171 }
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004172
4173 return strncmp(patt, name, len);
4174}
4175
Tejun Heo75683fe2007-07-05 13:31:27 +09004176static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004177{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004178 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4179 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004180 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004181
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004182 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4183 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004184
Alan Cox6919a0a2006-10-27 19:08:46 -07004185 while (ad->model_num) {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004186 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004187 if (ad->model_rev == NULL)
4188 return ad->horkage;
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004189 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
Alan Cox6919a0a2006-10-27 19:08:46 -07004190 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004191 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004192 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004194 return 0;
4195}
4196
Alan Cox6919a0a2006-10-27 19:08:46 -07004197static int ata_dma_blacklisted(const struct ata_device *dev)
4198{
4199 /* We don't support polling DMA.
4200 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4201 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4202 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004203 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004204 (dev->flags & ATA_DFLAG_CDB_INTR))
4205 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004206 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004207}
4208
Tejun Heoa6d5a512006-03-06 04:31:57 +09004209/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004210 * ata_is_40wire - check drive side detection
4211 * @dev: device
4212 *
4213 * Perform drive side detection decoding, allowing for device vendors
4214 * who can't follow the documentation.
4215 */
4216
4217static int ata_is_40wire(struct ata_device *dev)
4218{
4219 if (dev->horkage & ATA_HORKAGE_IVB)
4220 return ata_drive_40wire_relaxed(dev->id);
4221 return ata_drive_40wire(dev->id);
4222}
4223
4224/**
Alan Cox15a55512008-03-28 14:33:46 -07004225 * cable_is_40wire - 40/80/SATA decider
4226 * @ap: port to consider
4227 *
4228 * This function encapsulates the policy for speed management
4229 * in one place. At the moment we don't cache the result but
4230 * there is a good case for setting ap->cbl to the result when
4231 * we are called with unknown cables (and figuring out if it
4232 * impacts hotplug at all).
4233 *
4234 * Return 1 if the cable appears to be 40 wire.
4235 */
4236
4237static int cable_is_40wire(struct ata_port *ap)
4238{
4239 struct ata_link *link;
4240 struct ata_device *dev;
4241
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004242 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004243 if (ap->cbl == ATA_CBL_PATA40)
4244 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004245
4246 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004247 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4248 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004249
4250 /* If the system is known to be 40 wire short cable (eg
4251 * laptop), then we allow 80 wire modes even if the drive
4252 * isn't sure.
4253 */
Alan Coxf7920682008-04-08 16:37:50 +01004254 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4255 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004256
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004257 /* If the controller doesn't know, we scan.
4258 *
4259 * Note: We look for all 40 wire detects at this point. Any
4260 * 80 wire detect is taken to be 80 wire cable because
4261 * - in many setups only the one drive (slave if present) will
4262 * give a valid detect
4263 * - if you have a non detect capable drive you don't want it
4264 * to colour the choice
4265 */
Alan Cox15a55512008-03-28 14:33:46 -07004266 ata_port_for_each_link(link, ap) {
4267 ata_link_for_each_dev(dev, link) {
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004268 if (ata_dev_enabled(dev) && !ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004269 return 0;
4270 }
4271 }
4272 return 1;
4273}
4274
4275/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004276 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004277 * @dev: Device to compute xfermask for
4278 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004279 * Compute supported xfermask of @dev and store it in
4280 * dev->*_mask. This function is responsible for applying all
4281 * known limits including host controller limits, device
4282 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004283 *
4284 * LOCKING:
4285 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004286 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004287static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004288{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004289 struct ata_link *link = dev->link;
4290 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004291 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004292 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004293
Tejun Heo37deecb2006-08-10 16:59:07 +09004294 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004295 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4296 ap->mwdma_mask, ap->udma_mask);
4297
Robert Hancock8343f882007-03-06 02:37:51 -08004298 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004299 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4300 dev->mwdma_mask, dev->udma_mask);
4301 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004302
Alan Coxb352e572006-08-10 18:52:12 +01004303 /*
4304 * CFA Advanced TrueIDE timings are not allowed on a shared
4305 * cable
4306 */
4307 if (ata_dev_pair(dev)) {
4308 /* No PIO5 or PIO6 */
4309 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4310 /* No MWDMA3 or MWDMA 4 */
4311 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4312 }
4313
Tejun Heo37deecb2006-08-10 16:59:07 +09004314 if (ata_dma_blacklisted(dev)) {
4315 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09004316 ata_dev_printk(dev, KERN_WARNING,
4317 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004318 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004319
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004320 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004321 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004322 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4323 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4324 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004325 }
Tejun Heo565083e2006-04-02 17:54:47 +09004326
Jeff Garzike4246752007-03-09 09:56:46 -05004327 if (ap->flags & ATA_FLAG_NO_IORDY)
4328 xfer_mask &= ata_pio_mask_no_iordy(dev);
4329
Alan Cox5444a6f2006-03-27 18:58:20 +01004330 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004331 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004332
Robert Hancock8343f882007-03-06 02:37:51 -08004333 /* Apply cable rule here. Don't apply it early because when
4334 * we handle hot plug the cable type can itself change.
4335 * Check this last so that we know if the transfer rate was
4336 * solely limited by the cable.
4337 * Unknown or 80 wire cables reported host side are checked
4338 * drive side as well. Cases where we know a 40wire cable
4339 * is used safely for 80 are not checked here.
4340 */
4341 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4342 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004343 if (cable_is_40wire(ap)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004344 ata_dev_printk(dev, KERN_WARNING,
Robert Hancock8343f882007-03-06 02:37:51 -08004345 "limited to UDMA/33 due to 40-wire cable\n");
4346 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4347 }
4348
Tejun Heo565083e2006-04-02 17:54:47 +09004349 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4350 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004351}
4352
Linus Torvalds1da177e2005-04-16 15:20:36 -07004353/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004354 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004355 * @dev: Device to which command will be sent
4356 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004357 * Issue SET FEATURES - XFER MODE command to device @dev
4358 * on port @ap.
4359 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004360 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004361 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004362 *
4363 * RETURNS:
4364 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004365 */
4366
Tejun Heo3373efd2006-05-15 20:57:53 +09004367static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368{
Tejun Heoa0123702005-12-13 14:49:31 +09004369 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004370 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004371
4372 /* set up set-features taskfile */
4373 DPRINTK("set features - xfer mode\n");
4374
Tejun Heo464cf172007-05-27 15:10:40 +02004375 /* Some controllers and ATAPI devices show flaky interrupt
4376 * behavior after setting xfer mode. Use polling instead.
4377 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004378 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004379 tf.command = ATA_CMD_SET_FEATURES;
4380 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004381 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004382 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004383 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004384 if (ata_pio_need_iordy(dev))
4385 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004386 /* If the device has IORDY and the controller does not - turn it off */
4387 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004388 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004389 else /* In the ancient relic department - skip all of this */
4390 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004391
Tejun Heo2b789102007-10-09 15:05:44 +09004392 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004393
Tejun Heo83206a22006-03-24 15:25:31 +09004394 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4395 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004396}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004397/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004398 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004399 * @dev: Device to which command will be sent
4400 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004401 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004402 *
4403 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004404 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004405 *
4406 * LOCKING:
4407 * PCI/etc. bus probe sem.
4408 *
4409 * RETURNS:
4410 * 0 on success, AC_ERR_* mask otherwise.
4411 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04004412static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4413 u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004414{
4415 struct ata_taskfile tf;
4416 unsigned int err_mask;
4417
4418 /* set up set-features taskfile */
4419 DPRINTK("set features - SATA features\n");
4420
4421 ata_tf_init(dev, &tf);
4422 tf.command = ATA_CMD_SET_FEATURES;
4423 tf.feature = enable;
4424 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4425 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004426 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004427
Tejun Heo2b789102007-10-09 15:05:44 +09004428 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004429
4430 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4431 return err_mask;
4432}
4433
4434/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04004435 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04004436 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004437 * @heads: Number of heads (taskfile parameter)
4438 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004439 *
4440 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004441 * Kernel thread context (may sleep)
4442 *
4443 * RETURNS:
4444 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04004445 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004446static unsigned int ata_dev_init_params(struct ata_device *dev,
4447 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004448{
Tejun Heoa0123702005-12-13 14:49:31 +09004449 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004450 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004451
4452 /* Number of sectors per track 1-255. Number of heads 1-16 */
4453 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004454 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004455
4456 /* set up init dev params taskfile */
4457 DPRINTK("init dev params \n");
4458
Tejun Heo3373efd2006-05-15 20:57:53 +09004459 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004460 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4461 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4462 tf.protocol = ATA_PROT_NODATA;
4463 tf.nsect = sectors;
4464 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04004465
Tejun Heo2b789102007-10-09 15:05:44 +09004466 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004467 /* A clean abort indicates an original or just out of spec drive
4468 and we should continue as we issue the setup based on the
4469 drive reported working geometry */
4470 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4471 err_mask = 0;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004472
Tejun Heo6aff8f12006-02-15 18:24:09 +09004473 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4474 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004475}
4476
4477/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004478 * ata_sg_clean - Unmap DMA memory associated with command
4479 * @qc: Command containing DMA memory to be released
4480 *
4481 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004482 *
4483 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004484 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004485 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004486void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004487{
4488 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004489 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004490 int dir = qc->dma_dir;
4491
Tejun Heoa4631472006-02-11 19:11:13 +09004492 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004493
James Bottomleydde20202008-02-19 11:36:56 +01004494 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004495
James Bottomleydde20202008-02-19 11:36:56 +01004496 if (qc->n_elem)
4497 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004498
4499 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004500 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004501}
4502
4503/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004504 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004505 * @qc: Metadata associated with taskfile to check
4506 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004507 * Allow low-level driver to filter ATA PACKET commands, returning
4508 * a status indicating whether or not it is OK to use DMA for the
4509 * supplied PACKET command.
4510 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004511 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004512 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004513 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004514 * RETURNS: 0 when ATAPI DMA can be used
4515 * nonzero otherwise
4516 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004517int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004518{
4519 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004520
Tejun Heob9a41972007-06-27 02:48:43 +09004521 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4522 * few ATAPI devices choke on such DMA requests.
4523 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004524 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4525 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004526 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004527
Linus Torvalds1da177e2005-04-16 15:20:36 -07004528 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004529 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004530
Tejun Heob9a41972007-06-27 02:48:43 +09004531 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532}
Tejun Heob9a41972007-06-27 02:48:43 +09004533
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004535 * ata_std_qc_defer - Check whether a qc needs to be deferred
4536 * @qc: ATA command in question
4537 *
4538 * Non-NCQ commands cannot run with any other command, NCQ or
4539 * not. As upper layer only knows the queue depth, we are
4540 * responsible for maintaining exclusion. This function checks
4541 * whether a new command @qc can be issued.
4542 *
4543 * LOCKING:
4544 * spin_lock_irqsave(host lock)
4545 *
4546 * RETURNS:
4547 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4548 */
4549int ata_std_qc_defer(struct ata_queued_cmd *qc)
4550{
4551 struct ata_link *link = qc->dev->link;
4552
4553 if (qc->tf.protocol == ATA_PROT_NCQ) {
4554 if (!ata_tag_valid(link->active_tag))
4555 return 0;
4556 } else {
4557 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4558 return 0;
4559 }
4560
4561 return ATA_DEFER_LINK;
4562}
4563
Brian Kinge46834c2006-03-17 17:04:03 -06004564void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4565
Jeff Garzik0cba6322005-05-30 19:49:12 -04004566/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004567 * ata_sg_init - Associate command with scatter-gather table.
4568 * @qc: Command to be associated
4569 * @sg: Scatter-gather table.
4570 * @n_elem: Number of elements in s/g table.
4571 *
4572 * Initialize the data-related elements of queued_cmd @qc
4573 * to point to a scatter-gather table @sg, containing @n_elem
4574 * elements.
4575 *
4576 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004577 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004578 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004579void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4580 unsigned int n_elem)
4581{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004582 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004583 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004584 qc->cursg = qc->sg;
4585}
4586
Linus Torvalds1da177e2005-04-16 15:20:36 -07004587/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004588 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4589 * @qc: Command with scatter-gather table to be mapped.
4590 *
4591 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004592 *
4593 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004594 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004595 *
4596 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004597 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004598 *
4599 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600static int ata_sg_setup(struct ata_queued_cmd *qc)
4601{
4602 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004603 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004604
Tejun Heo44877b42007-02-21 01:06:51 +09004605 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004606
James Bottomleydde20202008-02-19 11:36:56 +01004607 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4608 if (n_elem < 1)
4609 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004610
James Bottomleydde20202008-02-19 11:36:56 +01004611 DPRINTK("%d sg elements mapped\n", n_elem);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004612
James Bottomleydde20202008-02-19 11:36:56 +01004613 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004614 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004615
4616 return 0;
4617}
4618
4619/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004620 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004621 * @buf: Buffer to swap
4622 * @buf_words: Number of 16-bit words in buffer.
4623 *
4624 * Swap halves of 16-bit words if needed to convert from
4625 * little-endian byte order to native cpu byte order, or
4626 * vice-versa.
4627 *
4628 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004629 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004630 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004631void swap_buf_le16(u16 *buf, unsigned int buf_words)
4632{
4633#ifdef __BIG_ENDIAN
4634 unsigned int i;
4635
4636 for (i = 0; i < buf_words; i++)
4637 buf[i] = le16_to_cpu(buf[i]);
4638#endif /* __BIG_ENDIAN */
4639}
4640
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004641/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004642 * ata_qc_new - Request an available ATA command, for queueing
4643 * @ap: Port associated with device @dev
4644 * @dev: Device from whom we request an available command structure
4645 *
4646 * LOCKING:
4647 * None.
4648 */
4649
4650static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4651{
4652 struct ata_queued_cmd *qc = NULL;
4653 unsigned int i;
4654
4655 /* no command while frozen */
4656 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4657 return NULL;
4658
4659 /* the last tag is reserved for internal command. */
4660 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4661 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4662 qc = __ata_qc_from_tag(ap, i);
4663 break;
4664 }
4665
4666 if (qc)
4667 qc->tag = i;
4668
4669 return qc;
4670}
4671
4672/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004673 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004674 * @dev: Device from whom we request an available command structure
Randy Dunlap3cd8ddb2008-10-26 20:19:32 -07004675 * @tag: command tag
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676 *
4677 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004678 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004679 */
4680
Tejun Heo8a8bc222008-11-10 14:48:21 +09004681struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004682{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004683 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004684 struct ata_queued_cmd *qc;
4685
Tejun Heo8a8bc222008-11-10 14:48:21 +09004686 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004687 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004688 qc->scsicmd = NULL;
4689 qc->ap = ap;
4690 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004691
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004692 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004693 }
4694
4695 return qc;
4696}
4697
Tejun Heo8a8bc222008-11-10 14:48:21 +09004698/**
4699 * ata_qc_free - free unused ata_queued_cmd
4700 * @qc: Command to complete
4701 *
4702 * Designed to free unused ata_queued_cmd object
4703 * in case something prevents using it.
4704 *
4705 * LOCKING:
4706 * spin_lock_irqsave(host lock)
4707 */
4708void ata_qc_free(struct ata_queued_cmd *qc)
4709{
4710 struct ata_port *ap = qc->ap;
4711 unsigned int tag;
4712
4713 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4714
4715 qc->flags = 0;
4716 tag = qc->tag;
4717 if (likely(ata_tag_valid(tag))) {
4718 qc->tag = ATA_TAG_POISON;
4719 clear_bit(tag, &ap->qc_allocated);
4720 }
4721}
4722
Tejun Heo76014422006-02-11 15:13:49 +09004723void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004724{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004725 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004726 struct ata_link *link = qc->dev->link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004727
Tejun Heoa4631472006-02-11 19:11:13 +09004728 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4729 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004730
4731 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4732 ata_sg_clean(qc);
4733
Tejun Heo7401abf2006-05-15 20:57:32 +09004734 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004735 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004736 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004737 if (!link->sactive)
4738 ap->nr_active_links--;
4739 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004740 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004741 ap->nr_active_links--;
4742 }
4743
4744 /* clear exclusive status */
4745 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4746 ap->excl_link == link))
4747 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004748
Albert Lee3f3791d2005-08-16 14:25:38 +08004749 /* atapi: mark qc as inactive to prevent the interrupt handler
4750 * from completing the command twice later, before the error handler
4751 * is called. (when rc != 0 and atapi request sense is needed)
4752 */
4753 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004754 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004755
Linus Torvalds1da177e2005-04-16 15:20:36 -07004756 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004757 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004758}
4759
Tejun Heo39599a52006-11-14 22:37:35 +09004760static void fill_result_tf(struct ata_queued_cmd *qc)
4761{
4762 struct ata_port *ap = qc->ap;
4763
Tejun Heo39599a52006-11-14 22:37:35 +09004764 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004765 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004766}
4767
Tejun Heo00115e02007-11-27 19:28:58 +09004768static void ata_verify_xfer(struct ata_queued_cmd *qc)
4769{
4770 struct ata_device *dev = qc->dev;
4771
4772 if (ata_tag_internal(qc->tag))
4773 return;
4774
4775 if (ata_is_nodata(qc->tf.protocol))
4776 return;
4777
4778 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4779 return;
4780
4781 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4782}
4783
Tejun Heof686bcb2006-05-15 20:58:05 +09004784/**
4785 * ata_qc_complete - Complete an active ATA command
4786 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004787 *
4788 * Indicate to the mid and upper layers that an ATA
4789 * command has completed, with either an ok or not-ok status.
4790 *
4791 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004792 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004793 */
4794void ata_qc_complete(struct ata_queued_cmd *qc)
4795{
4796 struct ata_port *ap = qc->ap;
4797
4798 /* XXX: New EH and old EH use different mechanisms to
4799 * synchronize EH with regular execution path.
4800 *
4801 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4802 * Normal execution path is responsible for not accessing a
4803 * failed qc. libata core enforces the rule by returning NULL
4804 * from ata_qc_from_tag() for failed qcs.
4805 *
4806 * Old EH depends on ata_qc_complete() nullifying completion
4807 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4808 * not synchronize with interrupt handler. Only PIO task is
4809 * taken care of.
4810 */
4811 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004812 struct ata_device *dev = qc->dev;
4813 struct ata_eh_info *ehi = &dev->link->eh_info;
4814
Tejun Heob51e9e52006-06-29 01:29:30 +09004815 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004816
4817 if (unlikely(qc->err_mask))
4818 qc->flags |= ATA_QCFLAG_FAILED;
4819
4820 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4821 if (!ata_tag_internal(qc->tag)) {
4822 /* always fill result TF for failed qc */
Tejun Heo39599a52006-11-14 22:37:35 +09004823 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004824 ata_qc_schedule_eh(qc);
4825 return;
4826 }
4827 }
4828
4829 /* read result TF if requested */
4830 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004831 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004832
Tejun Heo4dbfa392007-10-25 18:22:44 +09004833 /* Some commands need post-processing after successful
4834 * completion.
4835 */
4836 switch (qc->tf.command) {
4837 case ATA_CMD_SET_FEATURES:
4838 if (qc->tf.feature != SETFEATURES_WC_ON &&
4839 qc->tf.feature != SETFEATURES_WC_OFF)
4840 break;
4841 /* fall through */
4842 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4843 case ATA_CMD_SET_MULTI: /* multi_count changed */
4844 /* revalidate device */
4845 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4846 ata_port_schedule_eh(ap);
4847 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004848
4849 case ATA_CMD_SLEEP:
4850 dev->flags |= ATA_DFLAG_SLEEPING;
4851 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09004852 }
4853
Tejun Heo00115e02007-11-27 19:28:58 +09004854 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4855 ata_verify_xfer(qc);
4856
Tejun Heof686bcb2006-05-15 20:58:05 +09004857 __ata_qc_complete(qc);
4858 } else {
4859 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4860 return;
4861
4862 /* read result TF if failed or requested */
4863 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004864 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004865
4866 __ata_qc_complete(qc);
4867 }
4868}
4869
Tejun Heodedaf2b2006-05-15 21:03:43 +09004870/**
4871 * ata_qc_complete_multiple - Complete multiple qcs successfully
4872 * @ap: port in question
4873 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09004874 *
4875 * Complete in-flight commands. This functions is meant to be
4876 * called from low-level driver's interrupt routine to complete
4877 * requests normally. ap->qc_active and @qc_active is compared
4878 * and commands are completed accordingly.
4879 *
4880 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004881 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004882 *
4883 * RETURNS:
4884 * Number of completed commands on success, -errno otherwise.
4885 */
Tejun Heo79f97da2008-04-07 22:47:20 +09004886int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004887{
4888 int nr_done = 0;
4889 u32 done_mask;
4890 int i;
4891
4892 done_mask = ap->qc_active ^ qc_active;
4893
4894 if (unlikely(done_mask & qc_active)) {
4895 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4896 "(%08x->%08x)\n", ap->qc_active, qc_active);
4897 return -EINVAL;
4898 }
4899
4900 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4901 struct ata_queued_cmd *qc;
4902
4903 if (!(done_mask & (1 << i)))
4904 continue;
4905
4906 if ((qc = ata_qc_from_tag(ap, i))) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004907 ata_qc_complete(qc);
4908 nr_done++;
4909 }
4910 }
4911
4912 return nr_done;
4913}
4914
Linus Torvalds1da177e2005-04-16 15:20:36 -07004915/**
4916 * ata_qc_issue - issue taskfile to device
4917 * @qc: command to issue to device
4918 *
4919 * Prepare an ATA command to submission to device.
4920 * This includes mapping the data into a DMA-able
4921 * area, filling in the S/G table, and finally
4922 * writing the taskfile to hardware, starting the command.
4923 *
4924 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004925 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004926 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004927void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004928{
4929 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004930 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09004931 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004932
Tejun Heodedaf2b2006-05-15 21:03:43 +09004933 /* Make sure only one non-NCQ command is outstanding. The
4934 * check is skipped for old EH because it reuses active qc to
4935 * request ATAPI sense.
4936 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004937 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09004938
Tejun Heo1973a022007-12-05 10:36:13 +09004939 if (ata_is_ncq(prot)) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004940 WARN_ON(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09004941
4942 if (!link->sactive)
4943 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004944 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004945 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004946 WARN_ON(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09004947
4948 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004949 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004950 }
4951
Tejun Heoe4a70e72006-03-31 20:36:47 +09004952 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004953 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004954
Tejun Heof92a2632007-12-05 16:43:10 +09004955 /* We guarantee to LLDs that they will have at least one
4956 * non-zero sg if the command is a data command.
4957 */
Tejun Heoff2aeb12007-12-05 16:43:11 +09004958 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
Tejun Heof92a2632007-12-05 16:43:10 +09004959
Tejun Heo405e66b2007-11-27 19:28:53 +09004960 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09004961 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09004962 if (ata_sg_setup(qc))
4963 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004964
Tejun Heocf480622008-01-24 00:05:14 +09004965 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09004966 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09004967 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004968 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4969 ata_link_abort(link);
4970 return;
4971 }
4972
Linus Torvalds1da177e2005-04-16 15:20:36 -07004973 ap->ops->qc_prep(qc);
4974
Tejun Heo8e0e6942006-03-31 20:41:11 +09004975 qc->err_mask |= ap->ops->qc_issue(qc);
4976 if (unlikely(qc->err_mask))
4977 goto err;
4978 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004979
Tejun Heo8e436af2006-01-23 13:09:36 +09004980sg_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09004981 qc->err_mask |= AC_ERR_SYSTEM;
4982err:
4983 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004984}
4985
4986/**
Tejun Heo34bf2172006-05-15 20:57:46 +09004987 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09004988 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09004989 *
Tejun Heo936fd732007-08-06 18:36:23 +09004990 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09004991 *
4992 * LOCKING:
4993 * None.
4994 *
4995 * RETURNS:
4996 * 1 if SCRs are accessible, 0 otherwise.
4997 */
Tejun Heo936fd732007-08-06 18:36:23 +09004998int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09004999{
Tejun Heo936fd732007-08-06 18:36:23 +09005000 struct ata_port *ap = link->ap;
5001
Tejun Heoa16abc02007-05-21 18:33:47 +02005002 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005003}
5004
5005/**
5006 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005007 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005008 * @reg: SCR to read
5009 * @val: Place to store read value
5010 *
Tejun Heo936fd732007-08-06 18:36:23 +09005011 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005012 * guaranteed to succeed if @link is ap->link, the cable type of
5013 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005014 *
5015 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005016 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005017 *
5018 * RETURNS:
5019 * 0 on success, negative errno on failure.
5020 */
Tejun Heo936fd732007-08-06 18:36:23 +09005021int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005022{
Tejun Heo633273a2007-09-23 13:19:54 +09005023 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005024 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005025 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005026 return -EOPNOTSUPP;
5027 }
5028
5029 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005030}
5031
5032/**
5033 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005034 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005035 * @reg: SCR to write
5036 * @val: value to write
5037 *
Tejun Heo936fd732007-08-06 18:36:23 +09005038 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09005039 * guaranteed to succeed if @link is ap->link, the cable type of
5040 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09005041 *
5042 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005043 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005044 *
5045 * RETURNS:
5046 * 0 on success, negative errno on failure.
5047 */
Tejun Heo936fd732007-08-06 18:36:23 +09005048int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005049{
Tejun Heo633273a2007-09-23 13:19:54 +09005050 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005051 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09005052 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005053 return -EOPNOTSUPP;
5054 }
5055
5056 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005057}
5058
5059/**
5060 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005061 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005062 * @reg: SCR to write
5063 * @val: value to write
5064 *
5065 * This function is identical to sata_scr_write() except that this
5066 * function performs flush after writing to the register.
5067 *
5068 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09005069 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09005070 *
5071 * RETURNS:
5072 * 0 on success, negative errno on failure.
5073 */
Tejun Heo936fd732007-08-06 18:36:23 +09005074int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005075{
Tejun Heo633273a2007-09-23 13:19:54 +09005076 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005077 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005078
Tejun Heo633273a2007-09-23 13:19:54 +09005079 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005080 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005081 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005082 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a2007-09-23 13:19:54 +09005083 return rc;
5084 }
5085 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005086 }
Tejun Heo633273a2007-09-23 13:19:54 +09005087
5088 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005089}
5090
5091/**
Tejun Heob1c72912008-07-31 17:02:43 +09005092 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005093 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005094 *
Tejun Heo936fd732007-08-06 18:36:23 +09005095 * Test whether @link is online. Note that this function returns
5096 * 0 if online status of @link cannot be obtained, so
5097 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005098 *
5099 * LOCKING:
5100 * None.
5101 *
5102 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005103 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005104 */
Tejun Heob1c72912008-07-31 17:02:43 +09005105bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005106{
5107 u32 sstatus;
5108
Tejun Heo936fd732007-08-06 18:36:23 +09005109 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5110 (sstatus & 0xf) == 0x3)
Tejun Heob5b3fa32008-07-31 17:02:42 +09005111 return true;
5112 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005113}
5114
5115/**
Tejun Heob1c72912008-07-31 17:02:43 +09005116 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005117 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005118 *
Tejun Heo936fd732007-08-06 18:36:23 +09005119 * Test whether @link is offline. Note that this function
5120 * returns 0 if offline status of @link cannot be obtained, so
5121 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005122 *
5123 * LOCKING:
5124 * None.
5125 *
5126 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005127 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005128 */
Tejun Heob1c72912008-07-31 17:02:43 +09005129bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005130{
5131 u32 sstatus;
5132
Tejun Heo936fd732007-08-06 18:36:23 +09005133 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5134 (sstatus & 0xf) != 0x3)
Tejun Heob5b3fa32008-07-31 17:02:42 +09005135 return true;
5136 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005137}
Edward Falk0baab862005-06-02 18:17:13 -04005138
Tejun Heob1c72912008-07-31 17:02:43 +09005139/**
5140 * ata_link_online - test whether the given link is online
5141 * @link: ATA link to test
5142 *
5143 * Test whether @link is online. This is identical to
5144 * ata_phys_link_online() when there's no slave link. When
5145 * there's a slave link, this function should only be called on
5146 * the master link and will return true if any of M/S links is
5147 * online.
5148 *
5149 * LOCKING:
5150 * None.
5151 *
5152 * RETURNS:
5153 * True if the port online status is available and online.
5154 */
5155bool ata_link_online(struct ata_link *link)
5156{
5157 struct ata_link *slave = link->ap->slave_link;
5158
5159 WARN_ON(link == slave); /* shouldn't be called on slave link */
5160
5161 return ata_phys_link_online(link) ||
5162 (slave && ata_phys_link_online(slave));
5163}
5164
5165/**
5166 * ata_link_offline - test whether the given link is offline
5167 * @link: ATA link to test
5168 *
5169 * Test whether @link is offline. This is identical to
5170 * ata_phys_link_offline() when there's no slave link. When
5171 * there's a slave link, this function should only be called on
5172 * the master link and will return true if both M/S links are
5173 * offline.
5174 *
5175 * LOCKING:
5176 * None.
5177 *
5178 * RETURNS:
5179 * True if the port offline status is available and offline.
5180 */
5181bool ata_link_offline(struct ata_link *link)
5182{
5183 struct ata_link *slave = link->ap->slave_link;
5184
5185 WARN_ON(link == slave); /* shouldn't be called on slave link */
5186
5187 return ata_phys_link_offline(link) &&
5188 (!slave || ata_phys_link_offline(slave));
5189}
5190
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005191#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04005192static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5193 unsigned int action, unsigned int ehi_flags,
5194 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005195{
5196 unsigned long flags;
5197 int i, rc;
5198
Jeff Garzikcca39742006-08-24 03:19:22 -04005199 for (i = 0; i < host->n_ports; i++) {
5200 struct ata_port *ap = host->ports[i];
Tejun Heoe3667eb2007-08-06 18:36:24 +09005201 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005202
5203 /* Previous resume operation might still be in
5204 * progress. Wait for PM_PENDING to clear.
5205 */
5206 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5207 ata_port_wait_eh(ap);
5208 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5209 }
5210
5211 /* request PM ops to EH */
5212 spin_lock_irqsave(ap->lock, flags);
5213
5214 ap->pm_mesg = mesg;
5215 if (wait) {
5216 rc = 0;
5217 ap->pm_result = &rc;
5218 }
5219
5220 ap->pflags |= ATA_PFLAG_PM_PENDING;
Tejun Heoe3667eb2007-08-06 18:36:24 +09005221 __ata_port_for_each_link(link, ap) {
5222 link->eh_info.action |= action;
5223 link->eh_info.flags |= ehi_flags;
5224 }
Tejun Heo500530f2006-07-03 16:07:27 +09005225
5226 ata_port_schedule_eh(ap);
5227
5228 spin_unlock_irqrestore(ap->lock, flags);
5229
5230 /* wait and check result */
5231 if (wait) {
5232 ata_port_wait_eh(ap);
5233 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5234 if (rc)
5235 return rc;
5236 }
5237 }
5238
5239 return 0;
5240}
5241
5242/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005243 * ata_host_suspend - suspend host
5244 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005245 * @mesg: PM message
5246 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005247 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005248 * function requests EH to perform PM operations and waits for EH
5249 * to finish.
5250 *
5251 * LOCKING:
5252 * Kernel thread context (may sleep).
5253 *
5254 * RETURNS:
5255 * 0 on success, -errno on failure.
5256 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005257int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005258{
Tejun Heo9666f402007-05-04 21:27:47 +02005259 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005260
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005261 /*
5262 * disable link pm on all ports before requesting
5263 * any pm activity
5264 */
5265 ata_lpm_enable(host);
5266
Jeff Garzikcca39742006-08-24 03:19:22 -04005267 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005268 if (rc == 0)
5269 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005270 return rc;
5271}
5272
5273/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005274 * ata_host_resume - resume host
5275 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005276 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005277 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005278 * function requests EH to perform PM operations and returns.
5279 * Note that all resume operations are performed parallely.
5280 *
5281 * LOCKING:
5282 * Kernel thread context (may sleep).
5283 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005284void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005285{
Tejun Heocf480622008-01-24 00:05:14 +09005286 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
Jeff Garzikcca39742006-08-24 03:19:22 -04005287 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005288 host->dev->power.power_state = PMSG_ON;
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005289
5290 /* reenable link pm */
5291 ata_lpm_disable(host);
Tejun Heo500530f2006-07-03 16:07:27 +09005292}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005293#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005294
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005295/**
5296 * ata_port_start - Set port up for dma.
5297 * @ap: Port to initialize
5298 *
5299 * Called just after data structures for each port are
5300 * initialized. Allocates space for PRD table.
5301 *
5302 * May be used as the port_start() entry in ata_port_operations.
5303 *
5304 * LOCKING:
5305 * Inherited from caller.
5306 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09005307int ata_port_start(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005308{
Brian King2f1f6102006-03-23 17:30:15 -06005309 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005310
Tejun Heof0d36ef2007-01-20 16:00:28 +09005311 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5312 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005313 if (!ap->prd)
5314 return -ENOMEM;
5315
Linus Torvalds1da177e2005-04-16 15:20:36 -07005316 return 0;
5317}
5318
Edward Falk0baab862005-06-02 18:17:13 -04005319/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005320 * ata_dev_init - Initialize an ata_device structure
5321 * @dev: Device structure to initialize
5322 *
5323 * Initialize @dev in preparation for probing.
5324 *
5325 * LOCKING:
5326 * Inherited from caller.
5327 */
5328void ata_dev_init(struct ata_device *dev)
5329{
Tejun Heob1c72912008-07-31 17:02:43 +09005330 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005331 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005332 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005333
Tejun Heob1c72912008-07-31 17:02:43 +09005334 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005335 link->sata_spd_limit = link->hw_sata_spd_limit;
5336 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005337
Tejun Heo72fa4b72006-05-31 18:27:32 +09005338 /* High bits of dev->flags are used to record warm plug
5339 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005340 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005341 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005342 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005343 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005344 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005345 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005346
5347 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5348 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005349 dev->pio_mask = UINT_MAX;
5350 dev->mwdma_mask = UINT_MAX;
5351 dev->udma_mask = UINT_MAX;
5352}
5353
5354/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005355 * ata_link_init - Initialize an ata_link structure
5356 * @ap: ATA port link is attached to
5357 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005358 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005359 *
5360 * Initialize @link.
5361 *
5362 * LOCKING:
5363 * Kernel thread context (may sleep)
5364 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005365void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005366{
5367 int i;
5368
5369 /* clear everything except for devices */
5370 memset(link, 0, offsetof(struct ata_link, device[0]));
5371
5372 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005373 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005374 link->active_tag = ATA_TAG_POISON;
5375 link->hw_sata_spd_limit = UINT_MAX;
5376
5377 /* can't use iterator, ap isn't initialized yet */
5378 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5379 struct ata_device *dev = &link->device[i];
5380
5381 dev->link = link;
5382 dev->devno = dev - link->device;
5383 ata_dev_init(dev);
5384 }
5385}
5386
5387/**
5388 * sata_link_init_spd - Initialize link->sata_spd_limit
5389 * @link: Link to configure sata_spd_limit for
5390 *
5391 * Initialize @link->[hw_]sata_spd_limit to the currently
5392 * configured value.
5393 *
5394 * LOCKING:
5395 * Kernel thread context (may sleep).
5396 *
5397 * RETURNS:
5398 * 0 on success, -errno on failure.
5399 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005400int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005401{
Tejun Heo33267322008-02-13 09:15:09 +09005402 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005403 int rc;
5404
Tejun Heod127ea72008-07-31 16:09:34 +09005405 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005406 if (rc)
5407 return rc;
5408
Tejun Heod127ea72008-07-31 16:09:34 +09005409 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005410 if (spd)
5411 link->hw_sata_spd_limit &= (1 << spd) - 1;
5412
Tejun Heo05944bd2008-08-13 20:19:09 +09005413 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005414
Tejun Heo4fb37a22007-08-06 18:36:23 +09005415 link->sata_spd_limit = link->hw_sata_spd_limit;
5416
5417 return 0;
5418}
5419
5420/**
Tejun Heof3187192007-04-17 23:44:07 +09005421 * ata_port_alloc - allocate and initialize basic ATA port resources
5422 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005423 *
Tejun Heof3187192007-04-17 23:44:07 +09005424 * Allocate and initialize basic ATA port resources.
5425 *
5426 * RETURNS:
5427 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005428 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005429 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005430 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005431 */
Tejun Heof3187192007-04-17 23:44:07 +09005432struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005433{
Tejun Heof3187192007-04-17 23:44:07 +09005434 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005435
Tejun Heof3187192007-04-17 23:44:07 +09005436 DPRINTK("ENTER\n");
5437
5438 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5439 if (!ap)
5440 return NULL;
5441
Tejun Heof4d6d002007-05-01 11:50:15 +02005442 ap->pflags |= ATA_PFLAG_INITIALIZING;
Jeff Garzikcca39742006-08-24 03:19:22 -04005443 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005444 ap->flags = ATA_FLAG_DISABLED;
Tejun Heof3187192007-04-17 23:44:07 +09005445 ap->print_id = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005446 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04005447 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005448 ap->dev = host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005449 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005450
5451#if defined(ATA_VERBOSE_DEBUG)
5452 /* turn on all debugging levels */
5453 ap->msg_enable = 0x00FF;
5454#elif defined(ATA_DEBUG)
5455 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 +09005456#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005457 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005458#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005459
Tejun Heo127102a2008-04-07 22:47:21 +09005460#ifdef CONFIG_ATA_SFF
Jeff Garzik442eacc2007-12-19 04:25:10 -05005461 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
Tejun Heof667fdb2008-10-20 13:11:56 +09005462#else
5463 INIT_DELAYED_WORK(&ap->port_task, NULL);
Tejun Heo127102a2008-04-07 22:47:21 +09005464#endif
David Howells65f27f32006-11-22 14:55:48 +00005465 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5466 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005467 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005468 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005469 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005470 init_timer_deferrable(&ap->fastdrain_timer);
5471 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5472 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005473
Tejun Heo838df622006-05-15 20:57:44 +09005474 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005475
Tejun Heo89898052007-08-06 18:36:23 +09005476 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005477
5478#ifdef ATA_IRQ_TRAP
5479 ap->stats.unhandled_irq = 1;
5480 ap->stats.idle_irq = 1;
5481#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005482 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005483}
5484
Tejun Heof0d36ef2007-01-20 16:00:28 +09005485static void ata_host_release(struct device *gendev, void *res)
5486{
5487 struct ata_host *host = dev_get_drvdata(gendev);
5488 int i;
5489
5490 for (i = 0; i < host->n_ports; i++) {
5491 struct ata_port *ap = host->ports[i];
5492
Tejun Heoecef7252007-04-17 23:44:06 +09005493 if (!ap)
5494 continue;
5495
Tejun Heo49114872007-04-17 23:44:06 +09005496 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005497 scsi_host_put(ap->scsi_host);
5498
Tejun Heo633273a2007-09-23 13:19:54 +09005499 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005500 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005501 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005502 host->ports[i] = NULL;
5503 }
5504
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005505 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005506}
5507
Linus Torvalds1da177e2005-04-16 15:20:36 -07005508/**
Tejun Heof3187192007-04-17 23:44:07 +09005509 * ata_host_alloc - allocate and init basic ATA host resources
5510 * @dev: generic device this host is associated with
5511 * @max_ports: maximum number of ATA ports associated with this host
5512 *
5513 * Allocate and initialize basic ATA host resources. LLD calls
5514 * this function to allocate a host, initializes it fully and
5515 * attaches it using ata_host_register().
5516 *
5517 * @max_ports ports are allocated and host->n_ports is
5518 * initialized to @max_ports. The caller is allowed to decrease
5519 * host->n_ports before calling ata_host_register(). The unused
5520 * ports will be automatically freed on registration.
5521 *
5522 * RETURNS:
5523 * Allocate ATA host on success, NULL on failure.
5524 *
5525 * LOCKING:
5526 * Inherited from calling layer (may sleep).
5527 */
5528struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5529{
5530 struct ata_host *host;
5531 size_t sz;
5532 int i;
5533
5534 DPRINTK("ENTER\n");
5535
5536 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5537 return NULL;
5538
5539 /* alloc a container for our list of ATA ports (buses) */
5540 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5541 /* alloc a container for our list of ATA ports (buses) */
5542 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5543 if (!host)
5544 goto err_out;
5545
5546 devres_add(dev, host);
5547 dev_set_drvdata(dev, host);
5548
5549 spin_lock_init(&host->lock);
5550 host->dev = dev;
5551 host->n_ports = max_ports;
5552
5553 /* allocate ports bound to this host */
5554 for (i = 0; i < max_ports; i++) {
5555 struct ata_port *ap;
5556
5557 ap = ata_port_alloc(host);
5558 if (!ap)
5559 goto err_out;
5560
5561 ap->port_no = i;
5562 host->ports[i] = ap;
5563 }
5564
5565 devres_remove_group(dev, NULL);
5566 return host;
5567
5568 err_out:
5569 devres_release_group(dev, NULL);
5570 return NULL;
5571}
5572
5573/**
Tejun Heof5cda252007-04-17 23:44:07 +09005574 * ata_host_alloc_pinfo - alloc host and init with port_info array
5575 * @dev: generic device this host is associated with
5576 * @ppi: array of ATA port_info to initialize host with
5577 * @n_ports: number of ATA ports attached to this host
5578 *
5579 * Allocate ATA host and initialize with info from @ppi. If NULL
5580 * terminated, @ppi may contain fewer entries than @n_ports. The
5581 * last entry will be used for the remaining ports.
5582 *
5583 * RETURNS:
5584 * Allocate ATA host on success, NULL on failure.
5585 *
5586 * LOCKING:
5587 * Inherited from calling layer (may sleep).
5588 */
5589struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5590 const struct ata_port_info * const * ppi,
5591 int n_ports)
5592{
5593 const struct ata_port_info *pi;
5594 struct ata_host *host;
5595 int i, j;
5596
5597 host = ata_host_alloc(dev, n_ports);
5598 if (!host)
5599 return NULL;
5600
5601 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5602 struct ata_port *ap = host->ports[i];
5603
5604 if (ppi[j])
5605 pi = ppi[j++];
5606
5607 ap->pio_mask = pi->pio_mask;
5608 ap->mwdma_mask = pi->mwdma_mask;
5609 ap->udma_mask = pi->udma_mask;
5610 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005611 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005612 ap->ops = pi->port_ops;
5613
5614 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5615 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005616 }
5617
5618 return host;
5619}
5620
Tejun Heob1c72912008-07-31 17:02:43 +09005621/**
5622 * ata_slave_link_init - initialize slave link
5623 * @ap: port to initialize slave link for
5624 *
5625 * Create and initialize slave link for @ap. This enables slave
5626 * link handling on the port.
5627 *
5628 * In libata, a port contains links and a link contains devices.
5629 * There is single host link but if a PMP is attached to it,
5630 * there can be multiple fan-out links. On SATA, there's usually
5631 * a single device connected to a link but PATA and SATA
5632 * controllers emulating TF based interface can have two - master
5633 * and slave.
5634 *
5635 * However, there are a few controllers which don't fit into this
5636 * abstraction too well - SATA controllers which emulate TF
5637 * interface with both master and slave devices but also have
5638 * separate SCR register sets for each device. These controllers
5639 * need separate links for physical link handling
5640 * (e.g. onlineness, link speed) but should be treated like a
5641 * traditional M/S controller for everything else (e.g. command
5642 * issue, softreset).
5643 *
5644 * slave_link is libata's way of handling this class of
5645 * controllers without impacting core layer too much. For
5646 * anything other than physical link handling, the default host
5647 * link is used for both master and slave. For physical link
5648 * handling, separate @ap->slave_link is used. All dirty details
5649 * are implemented inside libata core layer. From LLD's POV, the
5650 * only difference is that prereset, hardreset and postreset are
5651 * called once more for the slave link, so the reset sequence
5652 * looks like the following.
5653 *
5654 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5655 * softreset(M) -> postreset(M) -> postreset(S)
5656 *
5657 * Note that softreset is called only for the master. Softreset
5658 * resets both M/S by definition, so SRST on master should handle
5659 * both (the standard method will work just fine).
5660 *
5661 * LOCKING:
5662 * Should be called before host is registered.
5663 *
5664 * RETURNS:
5665 * 0 on success, -errno on failure.
5666 */
5667int ata_slave_link_init(struct ata_port *ap)
5668{
5669 struct ata_link *link;
5670
5671 WARN_ON(ap->slave_link);
5672 WARN_ON(ap->flags & ATA_FLAG_PMP);
5673
5674 link = kzalloc(sizeof(*link), GFP_KERNEL);
5675 if (!link)
5676 return -ENOMEM;
5677
5678 ata_link_init(ap, link, 1);
5679 ap->slave_link = link;
5680 return 0;
5681}
5682
Tejun Heo32ebbc02007-11-08 13:09:00 +09005683static void ata_host_stop(struct device *gendev, void *res)
5684{
5685 struct ata_host *host = dev_get_drvdata(gendev);
5686 int i;
5687
5688 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5689
5690 for (i = 0; i < host->n_ports; i++) {
5691 struct ata_port *ap = host->ports[i];
5692
5693 if (ap->ops->port_stop)
5694 ap->ops->port_stop(ap);
5695 }
5696
5697 if (host->ops->host_stop)
5698 host->ops->host_stop(host);
5699}
5700
Tejun Heof5cda252007-04-17 23:44:07 +09005701/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005702 * ata_finalize_port_ops - finalize ata_port_operations
5703 * @ops: ata_port_operations to finalize
5704 *
5705 * An ata_port_operations can inherit from another ops and that
5706 * ops can again inherit from another. This can go on as many
5707 * times as necessary as long as there is no loop in the
5708 * inheritance chain.
5709 *
5710 * Ops tables are finalized when the host is started. NULL or
5711 * unspecified entries are inherited from the closet ancestor
5712 * which has the method and the entry is populated with it.
5713 * After finalization, the ops table directly points to all the
5714 * methods and ->inherits is no longer necessary and cleared.
5715 *
5716 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5717 *
5718 * LOCKING:
5719 * None.
5720 */
5721static void ata_finalize_port_ops(struct ata_port_operations *ops)
5722{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305723 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005724 const struct ata_port_operations *cur;
5725 void **begin = (void **)ops;
5726 void **end = (void **)&ops->inherits;
5727 void **pp;
5728
5729 if (!ops || !ops->inherits)
5730 return;
5731
5732 spin_lock(&lock);
5733
5734 for (cur = ops->inherits; cur; cur = cur->inherits) {
5735 void **inherit = (void **)cur;
5736
5737 for (pp = begin; pp < end; pp++, inherit++)
5738 if (!*pp)
5739 *pp = *inherit;
5740 }
5741
5742 for (pp = begin; pp < end; pp++)
5743 if (IS_ERR(*pp))
5744 *pp = NULL;
5745
5746 ops->inherits = NULL;
5747
5748 spin_unlock(&lock);
5749}
5750
5751/**
Tejun Heoecef7252007-04-17 23:44:06 +09005752 * ata_host_start - start and freeze ports of an ATA host
5753 * @host: ATA host to start ports for
5754 *
5755 * Start and then freeze ports of @host. Started status is
5756 * recorded in host->flags, so this function can be called
5757 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005758 * once. If host->ops isn't initialized yet, its set to the
5759 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005760 *
5761 * LOCKING:
5762 * Inherited from calling layer (may sleep).
5763 *
5764 * RETURNS:
5765 * 0 if all ports are started successfully, -errno otherwise.
5766 */
5767int ata_host_start(struct ata_host *host)
5768{
Tejun Heo32ebbc02007-11-08 13:09:00 +09005769 int have_stop = 0;
5770 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09005771 int i, rc;
5772
5773 if (host->flags & ATA_HOST_STARTED)
5774 return 0;
5775
Tejun Heo029cfd62008-03-25 12:22:49 +09005776 ata_finalize_port_ops(host->ops);
5777
Tejun Heoecef7252007-04-17 23:44:06 +09005778 for (i = 0; i < host->n_ports; i++) {
5779 struct ata_port *ap = host->ports[i];
5780
Tejun Heo029cfd62008-03-25 12:22:49 +09005781 ata_finalize_port_ops(ap->ops);
5782
Tejun Heof3187192007-04-17 23:44:07 +09005783 if (!host->ops && !ata_port_is_dummy(ap))
5784 host->ops = ap->ops;
5785
Tejun Heo32ebbc02007-11-08 13:09:00 +09005786 if (ap->ops->port_stop)
5787 have_stop = 1;
5788 }
5789
5790 if (host->ops->host_stop)
5791 have_stop = 1;
5792
5793 if (have_stop) {
5794 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5795 if (!start_dr)
5796 return -ENOMEM;
5797 }
5798
5799 for (i = 0; i < host->n_ports; i++) {
5800 struct ata_port *ap = host->ports[i];
5801
Tejun Heoecef7252007-04-17 23:44:06 +09005802 if (ap->ops->port_start) {
5803 rc = ap->ops->port_start(ap);
5804 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00005805 if (rc != -ENODEV)
Andrew Morton0f757742008-01-10 14:33:09 -08005806 dev_printk(KERN_ERR, host->dev,
5807 "failed to start port %d "
5808 "(errno=%d)\n", i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09005809 goto err_out;
5810 }
5811 }
Tejun Heoecef7252007-04-17 23:44:06 +09005812 ata_eh_freeze_port(ap);
5813 }
5814
Tejun Heo32ebbc02007-11-08 13:09:00 +09005815 if (start_dr)
5816 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005817 host->flags |= ATA_HOST_STARTED;
5818 return 0;
5819
5820 err_out:
5821 while (--i >= 0) {
5822 struct ata_port *ap = host->ports[i];
5823
5824 if (ap->ops->port_stop)
5825 ap->ops->port_stop(ap);
5826 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09005827 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005828 return rc;
5829}
5830
5831/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005832 * ata_sas_host_init - Initialize a host struct
5833 * @host: host to initialize
5834 * @dev: device host is attached to
5835 * @flags: host flags
5836 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005837 *
5838 * LOCKING:
5839 * PCI/etc. bus probe sem.
5840 *
5841 */
Tejun Heof3187192007-04-17 23:44:07 +09005842/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04005843void ata_host_init(struct ata_host *host, struct device *dev,
Tejun Heo029cfd62008-03-25 12:22:49 +09005844 unsigned long flags, struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005845{
Jeff Garzikcca39742006-08-24 03:19:22 -04005846 spin_lock_init(&host->lock);
5847 host->dev = dev;
5848 host->flags = flags;
5849 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005850}
5851
5852/**
Tejun Heof3187192007-04-17 23:44:07 +09005853 * ata_host_register - register initialized ATA host
5854 * @host: ATA host to register
5855 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04005856 *
Tejun Heof3187192007-04-17 23:44:07 +09005857 * Register initialized ATA host. @host is allocated using
5858 * ata_host_alloc() and fully initialized by LLD. This function
5859 * starts ports, registers @host with ATA and SCSI layers and
5860 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005861 *
5862 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005863 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005864 *
5865 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09005866 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005867 */
Tejun Heof3187192007-04-17 23:44:07 +09005868int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005869{
Tejun Heof3187192007-04-17 23:44:07 +09005870 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005871
Tejun Heof3187192007-04-17 23:44:07 +09005872 /* host must have been started */
5873 if (!(host->flags & ATA_HOST_STARTED)) {
5874 dev_printk(KERN_ERR, host->dev,
5875 "BUG: trying to register unstarted host\n");
5876 WARN_ON(1);
5877 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01005878 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09005879
Tejun Heof3187192007-04-17 23:44:07 +09005880 /* Blow away unused ports. This happens when LLD can't
5881 * determine the exact number of ports to allocate at
5882 * allocation time.
5883 */
5884 for (i = host->n_ports; host->ports[i]; i++)
5885 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005886
Tejun Heof3187192007-04-17 23:44:07 +09005887 /* give ports names and add SCSI hosts */
5888 for (i = 0; i < host->n_ports; i++)
5889 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09005890
Tejun Heof3187192007-04-17 23:44:07 +09005891 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09005892 if (rc)
Tejun Heof3187192007-04-17 23:44:07 +09005893 return rc;
Tejun Heoecef7252007-04-17 23:44:06 +09005894
Tejun Heofafbae82007-05-15 03:28:16 +09005895 /* associate with ACPI nodes */
5896 ata_acpi_associate(host);
5897
Tejun Heof3187192007-04-17 23:44:07 +09005898 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04005899 for (i = 0; i < host->n_ports; i++) {
5900 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09005901 unsigned long xfer_mask;
5902
5903 /* set SATA cable type if still unset */
5904 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5905 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005906
Tejun Heo5a04bf42006-05-31 18:27:38 +09005907 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09005908 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09005909 if (ap->slave_link)
5910 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09005911
Tejun Heocbcdd872007-08-18 13:14:55 +09005912 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09005913 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5914 ap->udma_mask);
5915
Tejun Heoabf6e8e2007-10-09 14:57:25 +09005916 if (!ata_port_is_dummy(ap)) {
Tejun Heocbcdd872007-08-18 13:14:55 +09005917 ata_port_printk(ap, KERN_INFO,
5918 "%cATA max %s %s\n",
Tejun Heoa16abc02007-05-21 18:33:47 +02005919 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
Tejun Heof3187192007-04-17 23:44:07 +09005920 ata_mode_string(xfer_mask),
Tejun Heocbcdd872007-08-18 13:14:55 +09005921 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09005922 ata_ehi_clear_desc(&ap->link.eh_info);
5923 } else
Tejun Heof3187192007-04-17 23:44:07 +09005924 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
5925 }
5926
5927 /* perform each probe synchronously */
5928 DPRINTK("probe begin\n");
5929 for (i = 0; i < host->n_ports; i++) {
5930 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09005931
5932 /* probe */
Tejun Heo52783c52006-05-31 18:28:22 +09005933 if (ap->ops->error_handler) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005934 struct ata_eh_info *ehi = &ap->link.eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09005935 unsigned long flags;
5936
5937 ata_port_probe(ap);
5938
5939 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005940 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005941
Tejun Heob558edd2008-01-24 00:05:14 +09005942 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heo391191c2008-05-19 01:15:12 +09005943 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
Tejun Heo1cdaf532006-07-03 16:07:26 +09005944 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09005945
Tejun Heof4d6d002007-05-01 11:50:15 +02005946 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
Tejun Heob51e9e52006-06-29 01:29:30 +09005947 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09005948 ata_port_schedule_eh(ap);
5949
Jeff Garzikba6a1302006-06-22 23:46:10 -04005950 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005951
5952 /* wait for EH to finish */
5953 ata_port_wait_eh(ap);
5954 } else {
Tejun Heo44877b42007-02-21 01:06:51 +09005955 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09005956 rc = ata_bus_probe(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09005957 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09005958
5959 if (rc) {
5960 /* FIXME: do something useful here?
5961 * Current libata behavior will
5962 * tear down everything when
5963 * the module is removed
5964 * or the h/w is unplugged.
5965 */
5966 }
5967 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005968 }
5969
5970 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005971 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04005972 for (i = 0; i < host->n_ports; i++) {
5973 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07005974
Tejun Heo1ae46312007-07-16 14:29:40 +09005975 ata_scsi_scan_host(ap, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005976 }
5977
Tejun Heof3187192007-04-17 23:44:07 +09005978 return 0;
5979}
5980
5981/**
Tejun Heof5cda252007-04-17 23:44:07 +09005982 * ata_host_activate - start host, request IRQ and register it
5983 * @host: target ATA host
5984 * @irq: IRQ to request
5985 * @irq_handler: irq_handler used when requesting IRQ
5986 * @irq_flags: irq_flags used when requesting IRQ
5987 * @sht: scsi_host_template to use when registering the host
5988 *
5989 * After allocating an ATA host and initializing it, most libata
5990 * LLDs perform three steps to activate the host - start host,
5991 * request IRQ and register it. This helper takes necessasry
5992 * arguments and performs the three steps in one go.
5993 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09005994 * An invalid IRQ skips the IRQ registration and expects the host to
5995 * have set polling mode on the port. In this case, @irq_handler
5996 * should be NULL.
5997 *
Tejun Heof5cda252007-04-17 23:44:07 +09005998 * LOCKING:
5999 * Inherited from calling layer (may sleep).
6000 *
6001 * RETURNS:
6002 * 0 on success, -errno otherwise.
6003 */
6004int ata_host_activate(struct ata_host *host, int irq,
6005 irq_handler_t irq_handler, unsigned long irq_flags,
6006 struct scsi_host_template *sht)
6007{
Tejun Heocbcdd872007-08-18 13:14:55 +09006008 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006009
6010 rc = ata_host_start(host);
6011 if (rc)
6012 return rc;
6013
Paul Mundt3d46b2e2007-11-08 11:14:56 +09006014 /* Special case for polling mode */
6015 if (!irq) {
6016 WARN_ON(irq_handler);
6017 return ata_host_register(host, sht);
6018 }
6019
Tejun Heof5cda252007-04-17 23:44:07 +09006020 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6021 dev_driver_string(host->dev), host);
6022 if (rc)
6023 return rc;
6024
Tejun Heocbcdd872007-08-18 13:14:55 +09006025 for (i = 0; i < host->n_ports; i++)
6026 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006027
Tejun Heof5cda252007-04-17 23:44:07 +09006028 rc = ata_host_register(host, sht);
6029 /* if failed, just free the IRQ and leave ports alone */
6030 if (rc)
6031 devm_free_irq(host->dev, irq, host);
6032
6033 return rc;
6034}
6035
6036/**
Tejun Heo720ba122006-05-31 18:28:13 +09006037 * ata_port_detach - Detach ATA port in prepration of device removal
6038 * @ap: ATA port to be detached
6039 *
6040 * Detach all ATA devices and the associated SCSI devices of @ap;
6041 * then, remove the associated SCSI host. @ap is guaranteed to
6042 * be quiescent on return from this function.
6043 *
6044 * LOCKING:
6045 * Kernel thread context (may sleep).
6046 */
Adrian Bunk741b7762007-10-24 18:23:06 +02006047static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09006048{
6049 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09006050 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09006051 struct ata_device *dev;
Tejun Heo720ba122006-05-31 18:28:13 +09006052
6053 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006054 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006055
6056 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006057 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006058 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04006059 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006060
6061 ata_port_wait_eh(ap);
6062
Tejun Heo7f9ad9b2007-12-15 15:05:00 +09006063 /* EH is now guaranteed to see UNLOADING - EH context belongs
Tejun Heod127ea72008-07-31 16:09:34 +09006064 * to us. Restore SControl and disable all existing devices.
Tejun Heo720ba122006-05-31 18:28:13 +09006065 */
Tejun Heod127ea72008-07-31 16:09:34 +09006066 __ata_port_for_each_link(link, ap) {
Tejun Heo299246f2008-11-03 19:27:07 +09006067 sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
Tejun Heo41bda9c2007-08-06 18:36:24 +09006068 ata_link_for_each_dev(dev, link)
6069 ata_dev_disable(dev);
6070 }
Tejun Heo720ba122006-05-31 18:28:13 +09006071
Tejun Heo720ba122006-05-31 18:28:13 +09006072 /* Final freeze & EH. All in-flight commands are aborted. EH
6073 * will be skipped and retrials will be terminated with bad
6074 * target.
6075 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006076 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006077 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006078 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006079
6080 ata_port_wait_eh(ap);
Oleg Nesterov45a66c12007-07-09 11:46:13 -07006081 cancel_rearming_delayed_work(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006082
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006083 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09006084 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006085 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006086}
6087
6088/**
Tejun Heo0529c152007-01-20 16:00:26 +09006089 * ata_host_detach - Detach all ports of an ATA host
6090 * @host: Host to detach
6091 *
6092 * Detach all ports of @host.
6093 *
6094 * LOCKING:
6095 * Kernel thread context (may sleep).
6096 */
6097void ata_host_detach(struct ata_host *host)
6098{
6099 int i;
6100
6101 for (i = 0; i < host->n_ports; i++)
6102 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006103
6104 /* the host is dead now, dissociate ACPI */
6105 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09006106}
6107
Jeff Garzik374b1872005-08-30 05:42:52 -04006108#ifdef CONFIG_PCI
6109
Edward Falk0baab862005-06-02 18:17:13 -04006110/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006111 * ata_pci_remove_one - PCI layer callback for device removal
6112 * @pdev: PCI device that was removed
6113 *
Tejun Heob878ca52007-01-20 16:00:28 +09006114 * PCI layer indicates to libata via this hook that hot-unplug or
6115 * module unload event has occurred. Detach all ports. Resource
6116 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006117 *
6118 * LOCKING:
6119 * Inherited from PCI layer (may sleep).
6120 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006121void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006122{
Jeff Garzik28555682007-10-11 17:12:35 -04006123 struct device *dev = &pdev->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006124 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006125
Tejun Heob878ca52007-01-20 16:00:28 +09006126 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006127}
6128
6129/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006130int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006131{
6132 unsigned long tmp = 0;
6133
6134 switch (bits->width) {
6135 case 1: {
6136 u8 tmp8 = 0;
6137 pci_read_config_byte(pdev, bits->reg, &tmp8);
6138 tmp = tmp8;
6139 break;
6140 }
6141 case 2: {
6142 u16 tmp16 = 0;
6143 pci_read_config_word(pdev, bits->reg, &tmp16);
6144 tmp = tmp16;
6145 break;
6146 }
6147 case 4: {
6148 u32 tmp32 = 0;
6149 pci_read_config_dword(pdev, bits->reg, &tmp32);
6150 tmp = tmp32;
6151 break;
6152 }
6153
6154 default:
6155 return -EINVAL;
6156 }
6157
6158 tmp &= bits->mask;
6159
6160 return (tmp == bits->val) ? 1 : 0;
6161}
Jens Axboe9b847542006-01-06 09:28:07 +01006162
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006163#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006164void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006165{
6166 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006167 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006168
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006169 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006170 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006171}
6172
Tejun Heo553c4aa2006-12-26 19:39:50 +09006173int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006174{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006175 int rc;
6176
Jens Axboe9b847542006-01-06 09:28:07 +01006177 pci_set_power_state(pdev, PCI_D0);
6178 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006179
Tejun Heob878ca52007-01-20 16:00:28 +09006180 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006181 if (rc) {
6182 dev_printk(KERN_ERR, &pdev->dev,
6183 "failed to enable device after resume (%d)\n", rc);
6184 return rc;
6185 }
6186
Jens Axboe9b847542006-01-06 09:28:07 +01006187 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006188 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006189}
6190
Tejun Heo3c5100c2006-07-26 16:58:33 +09006191int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006192{
Jeff Garzikcca39742006-08-24 03:19:22 -04006193 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006194 int rc = 0;
6195
Jeff Garzikcca39742006-08-24 03:19:22 -04006196 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006197 if (rc)
6198 return rc;
6199
Tejun Heo3c5100c2006-07-26 16:58:33 +09006200 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006201
6202 return 0;
6203}
6204
6205int ata_pci_device_resume(struct pci_dev *pdev)
6206{
Jeff Garzikcca39742006-08-24 03:19:22 -04006207 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006208 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006209
Tejun Heo553c4aa2006-12-26 19:39:50 +09006210 rc = ata_pci_device_do_resume(pdev);
6211 if (rc == 0)
6212 ata_host_resume(host);
6213 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006214}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006215#endif /* CONFIG_PM */
6216
Linus Torvalds1da177e2005-04-16 15:20:36 -07006217#endif /* CONFIG_PCI */
6218
Tejun Heo33267322008-02-13 09:15:09 +09006219static int __init ata_parse_force_one(char **cur,
6220 struct ata_force_ent *force_ent,
6221 const char **reason)
6222{
6223 /* FIXME: Currently, there's no way to tag init const data and
6224 * using __initdata causes build failure on some versions of
6225 * gcc. Once __initdataconst is implemented, add const to the
6226 * following structure.
6227 */
6228 static struct ata_force_param force_tbl[] __initdata = {
6229 { "40c", .cbl = ATA_CBL_PATA40 },
6230 { "80c", .cbl = ATA_CBL_PATA80 },
6231 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6232 { "unk", .cbl = ATA_CBL_PATA_UNK },
6233 { "ign", .cbl = ATA_CBL_PATA_IGN },
6234 { "sata", .cbl = ATA_CBL_SATA },
6235 { "1.5Gbps", .spd_limit = 1 },
6236 { "3.0Gbps", .spd_limit = 2 },
6237 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6238 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6239 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6240 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6241 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6242 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6243 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6244 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6245 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6246 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6247 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6248 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6249 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6250 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6251 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6252 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6253 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6254 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6255 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6256 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6257 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6258 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6259 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6260 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6261 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6262 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6263 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6264 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6265 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6266 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6267 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6268 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6269 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6270 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6271 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6272 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006273 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6274 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6275 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Tejun Heo33267322008-02-13 09:15:09 +09006276 };
6277 char *start = *cur, *p = *cur;
6278 char *id, *val, *endp;
6279 const struct ata_force_param *match_fp = NULL;
6280 int nr_matches = 0, i;
6281
6282 /* find where this param ends and update *cur */
6283 while (*p != '\0' && *p != ',')
6284 p++;
6285
6286 if (*p == '\0')
6287 *cur = p;
6288 else
6289 *cur = p + 1;
6290
6291 *p = '\0';
6292
6293 /* parse */
6294 p = strchr(start, ':');
6295 if (!p) {
6296 val = strstrip(start);
6297 goto parse_val;
6298 }
6299 *p = '\0';
6300
6301 id = strstrip(start);
6302 val = strstrip(p + 1);
6303
6304 /* parse id */
6305 p = strchr(id, '.');
6306 if (p) {
6307 *p++ = '\0';
6308 force_ent->device = simple_strtoul(p, &endp, 10);
6309 if (p == endp || *endp != '\0') {
6310 *reason = "invalid device";
6311 return -EINVAL;
6312 }
6313 }
6314
6315 force_ent->port = simple_strtoul(id, &endp, 10);
6316 if (p == endp || *endp != '\0') {
6317 *reason = "invalid port/link";
6318 return -EINVAL;
6319 }
6320
6321 parse_val:
6322 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6323 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6324 const struct ata_force_param *fp = &force_tbl[i];
6325
6326 if (strncasecmp(val, fp->name, strlen(val)))
6327 continue;
6328
6329 nr_matches++;
6330 match_fp = fp;
6331
6332 if (strcasecmp(val, fp->name) == 0) {
6333 nr_matches = 1;
6334 break;
6335 }
6336 }
6337
6338 if (!nr_matches) {
6339 *reason = "unknown value";
6340 return -EINVAL;
6341 }
6342 if (nr_matches > 1) {
6343 *reason = "ambigious value";
6344 return -EINVAL;
6345 }
6346
6347 force_ent->param = *match_fp;
6348
6349 return 0;
6350}
6351
6352static void __init ata_parse_force_param(void)
6353{
6354 int idx = 0, size = 1;
6355 int last_port = -1, last_device = -1;
6356 char *p, *cur, *next;
6357
6358 /* calculate maximum number of params and allocate force_tbl */
6359 for (p = ata_force_param_buf; *p; p++)
6360 if (*p == ',')
6361 size++;
6362
6363 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6364 if (!ata_force_tbl) {
6365 printk(KERN_WARNING "ata: failed to extend force table, "
6366 "libata.force ignored\n");
6367 return;
6368 }
6369
6370 /* parse and populate the table */
6371 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6372 const char *reason = "";
6373 struct ata_force_ent te = { .port = -1, .device = -1 };
6374
6375 next = cur;
6376 if (ata_parse_force_one(&next, &te, &reason)) {
6377 printk(KERN_WARNING "ata: failed to parse force "
6378 "parameter \"%s\" (%s)\n",
6379 cur, reason);
6380 continue;
6381 }
6382
6383 if (te.port == -1) {
6384 te.port = last_port;
6385 te.device = last_device;
6386 }
6387
6388 ata_force_tbl[idx++] = te;
6389
6390 last_port = te.port;
6391 last_device = te.device;
6392 }
6393
6394 ata_force_tbl_size = idx;
6395}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006396
Linus Torvalds1da177e2005-04-16 15:20:36 -07006397static int __init ata_init(void)
6398{
Tejun Heo33267322008-02-13 09:15:09 +09006399 ata_parse_force_param();
6400
Linus Torvalds1da177e2005-04-16 15:20:36 -07006401 ata_wq = create_workqueue("ata");
6402 if (!ata_wq)
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006403 goto free_force_tbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006404
Tejun Heo453b07a2006-05-31 18:27:42 +09006405 ata_aux_wq = create_singlethread_workqueue("ata_aux");
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006406 if (!ata_aux_wq)
6407 goto free_wq;
Tejun Heo453b07a2006-05-31 18:27:42 +09006408
Linus Torvalds1da177e2005-04-16 15:20:36 -07006409 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6410 return 0;
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006411
6412free_wq:
6413 destroy_workqueue(ata_wq);
6414free_force_tbl:
6415 kfree(ata_force_tbl);
6416 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006417}
6418
6419static void __exit ata_exit(void)
6420{
Tejun Heo33267322008-02-13 09:15:09 +09006421 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006422 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09006423 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006424}
6425
Brian Kinga4625082006-11-13 16:32:36 -06006426subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006427module_exit(ata_exit);
6428
Jeff Garzik67846b32005-10-05 02:58:32 -04006429static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07006430static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04006431
6432int ata_ratelimit(void)
6433{
6434 int rc;
6435 unsigned long flags;
6436
6437 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6438
6439 if (time_after(jiffies, ratelimit_time)) {
6440 rc = 1;
6441 ratelimit_time = jiffies + (HZ/5);
6442 } else
6443 rc = 0;
6444
6445 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6446
6447 return rc;
6448}
6449
Tejun Heoc22daff2006-04-11 22:22:29 +09006450/**
6451 * ata_wait_register - wait until register value changes
6452 * @reg: IO-mapped register
6453 * @mask: Mask to apply to read register value
6454 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006455 * @interval: polling interval in milliseconds
6456 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006457 *
6458 * Waiting for some bits of register to change is a common
6459 * operation for ATA controllers. This function reads 32bit LE
6460 * IO-mapped register @reg and tests for the following condition.
6461 *
6462 * (*@reg & mask) != val
6463 *
6464 * If the condition is met, it returns; otherwise, the process is
6465 * repeated after @interval_msec until timeout.
6466 *
6467 * LOCKING:
6468 * Kernel thread context (may sleep)
6469 *
6470 * RETURNS:
6471 * The final register value.
6472 */
6473u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006474 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006475{
Tejun Heo341c2c92008-05-20 02:17:51 +09006476 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006477 u32 tmp;
6478
6479 tmp = ioread32(reg);
6480
6481 /* Calculate timeout _after_ the first read to make sure
6482 * preceding writes reach the controller before starting to
6483 * eat away the timeout.
6484 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006485 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006486
Tejun Heo341c2c92008-05-20 02:17:51 +09006487 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6488 msleep(interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006489 tmp = ioread32(reg);
6490 }
6491
6492 return tmp;
6493}
6494
Linus Torvalds1da177e2005-04-16 15:20:36 -07006495/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006496 * Dummy port_ops
6497 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006498static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6499{
6500 return AC_ERR_SYSTEM;
6501}
6502
Tejun Heo182d7bb2008-04-07 22:47:21 +09006503static void ata_dummy_error_handler(struct ata_port *ap)
6504{
6505 /* truly dummy */
6506}
6507
Tejun Heo029cfd62008-03-25 12:22:49 +09006508struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006509 .qc_prep = ata_noop_qc_prep,
6510 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006511 .error_handler = ata_dummy_error_handler,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006512};
6513
Tejun Heo21b0ad42007-04-17 23:44:07 +09006514const struct ata_port_info ata_dummy_port_info = {
6515 .port_ops = &ata_dummy_port_ops,
6516};
6517
Tejun Heodd5b06c2006-08-10 16:59:12 +09006518/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006519 * libata is essentially a library of internal helper functions for
6520 * low-level ATA host controller drivers. As such, the API/ABI is
6521 * likely to change as new drivers are added and updated.
6522 * Do not depend on ABI/API stability.
6523 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006524EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6525EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6526EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006527EXPORT_SYMBOL_GPL(ata_base_port_ops);
6528EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006529EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006530EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heoaadffb62008-07-31 17:02:41 +09006531EXPORT_SYMBOL_GPL(__ata_port_next_link);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006532EXPORT_SYMBOL_GPL(ata_std_bios_param);
Jeff Garzikcca39742006-08-24 03:19:22 -04006533EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006534EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006535EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006536EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006537EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006538EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006539EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09006540EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006541EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006542EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006543EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006544EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006545EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6546EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006547EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6548EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6549EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6550EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6551EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6552EXPORT_SYMBOL_GPL(ata_mode_string);
6553EXPORT_SYMBOL_GPL(ata_id_xfermask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006554EXPORT_SYMBOL_GPL(ata_port_start);
Alan04351822007-03-06 02:37:52 -08006555EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006556EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006557EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006558EXPORT_SYMBOL_GPL(ata_port_probe);
Alan10305f02007-02-20 18:01:59 +00006559EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006560EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006561EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006562EXPORT_SYMBOL_GPL(sata_link_debounce);
6563EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo0aa11132008-04-07 22:47:18 +09006564EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006565EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006566EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006567EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006568EXPORT_SYMBOL_GPL(ata_dev_classify);
6569EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006570EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04006571EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09006572EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006573EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6574EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006575EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006576EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006577EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006578EXPORT_SYMBOL_GPL(sata_scr_valid);
6579EXPORT_SYMBOL_GPL(sata_scr_read);
6580EXPORT_SYMBOL_GPL(sata_scr_write);
6581EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006582EXPORT_SYMBOL_GPL(ata_link_online);
6583EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006584#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006585EXPORT_SYMBOL_GPL(ata_host_suspend);
6586EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006587#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006588EXPORT_SYMBOL_GPL(ata_id_string);
6589EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006590EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006591EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6592
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006593EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006594EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006595EXPORT_SYMBOL_GPL(ata_timing_compute);
6596EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006597EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006598
Linus Torvalds1da177e2005-04-16 15:20:36 -07006599#ifdef CONFIG_PCI
6600EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006601EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006602#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006603EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6604EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006605EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6606EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006607#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006608#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006609
Tejun Heob64bbc32007-07-16 14:29:39 +09006610EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6611EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6612EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09006613EXPORT_SYMBOL_GPL(ata_port_desc);
6614#ifdef CONFIG_PCI
6615EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6616#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09006617EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09006618EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006619EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006620EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09006621EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09006622EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6623EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006624EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6625EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04006626EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09006627EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09006628EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006629
6630EXPORT_SYMBOL_GPL(ata_cable_40wire);
6631EXPORT_SYMBOL_GPL(ata_cable_80wire);
6632EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09006633EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006634EXPORT_SYMBOL_GPL(ata_cable_sata);