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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;
615 block |= tf->hob_lbal << 24;
616 } 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 Heoffeae412006-03-01 16:09:35 +09002495 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496
2497err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002498 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002499 ata_dev_printk(dev, KERN_DEBUG,
Harvey Harrison7f5e4e82008-03-05 18:24:52 -08002500 "%s: EXIT, err\n", __func__);
Tejun Heoffeae412006-03-01 16:09:35 +09002501 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502}
2503
2504/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002505 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002506 * @ap: port
2507 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002508 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002509 * detection.
2510 */
2511
2512int ata_cable_40wire(struct ata_port *ap)
2513{
2514 return ATA_CBL_PATA40;
2515}
2516
2517/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002518 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002519 * @ap: port
2520 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002521 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002522 * detection.
2523 */
2524
2525int ata_cable_80wire(struct ata_port *ap)
2526{
2527 return ATA_CBL_PATA80;
2528}
2529
2530/**
2531 * ata_cable_unknown - return unknown PATA cable.
2532 * @ap: port
2533 *
2534 * Helper method for drivers which have no PATA cable detection.
2535 */
2536
2537int ata_cable_unknown(struct ata_port *ap)
2538{
2539 return ATA_CBL_PATA_UNK;
2540}
2541
2542/**
Tejun Heoc88f90c2007-11-27 19:43:48 +09002543 * ata_cable_ignore - return ignored PATA cable.
2544 * @ap: port
2545 *
2546 * Helper method for drivers which don't use cable type to limit
2547 * transfer mode.
2548 */
2549int ata_cable_ignore(struct ata_port *ap)
2550{
2551 return ATA_CBL_PATA_IGN;
2552}
2553
2554/**
Alan Coxbe0d18d2007-03-06 02:37:56 -08002555 * ata_cable_sata - return SATA cable type
2556 * @ap: port
2557 *
2558 * Helper method for drivers which have SATA cables
2559 */
2560
2561int ata_cable_sata(struct ata_port *ap)
2562{
2563 return ATA_CBL_SATA;
2564}
2565
2566/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 * ata_bus_probe - Reset and probe ATA bus
2568 * @ap: Bus to probe
2569 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002570 * Master ATA bus probing function. Initiates a hardware-dependent
2571 * bus reset, then attempts to identify any devices found on
2572 * the bus.
2573 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002574 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002575 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576 *
2577 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002578 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579 */
2580
Brian King80289162006-08-07 14:27:31 -05002581int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002583 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002584 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002585 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002586 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587
Tejun Heo28ca5c52006-03-01 16:09:36 +09002588 ata_port_probe(ap);
2589
Tejun Heof58229f2007-08-06 18:36:23 +09002590 ata_link_for_each_dev(dev, &ap->link)
2591 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002592
2593 retry:
Tejun Heocdeab112007-10-29 16:41:09 +09002594 ata_link_for_each_dev(dev, &ap->link) {
2595 /* If we issue an SRST then an ATA drive (not ATAPI)
2596 * may change configuration and be in PIO0 timing. If
2597 * we do a hard reset (or are coming from power on)
2598 * this is true for ATA or ATAPI. Until we've set a
2599 * suitable controller mode we should not touch the
2600 * bus as we may be talking too fast.
2601 */
2602 dev->pio_mode = XFER_PIO_0;
2603
2604 /* If the controller has a pio mode setup function
2605 * then use it to set the chipset to rights. Don't
2606 * touch the DMA setup as that will be dealt with when
2607 * configuring devices.
2608 */
2609 if (ap->ops->set_piomode)
2610 ap->ops->set_piomode(ap, dev);
2611 }
2612
Tejun Heo20444702006-03-13 01:57:01 +09002613 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002614 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002615
Tejun Heof58229f2007-08-06 18:36:23 +09002616 ata_link_for_each_dev(dev, &ap->link) {
Tejun Heo52783c52006-05-31 18:28:22 +09002617 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2618 dev->class != ATA_DEV_UNKNOWN)
2619 classes[dev->devno] = dev->class;
2620 else
2621 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002622
Tejun Heo52783c52006-05-31 18:28:22 +09002623 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002624 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625
Tejun Heo52783c52006-05-31 18:28:22 +09002626 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09002627
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002628 /* read IDENTIFY page and configure devices. We have to do the identify
2629 specific sequence bass-ackwards so that PDIAG- is released by
2630 the slave device */
2631
Bartlomiej Zolnierkiewicza4ba7fe2008-04-02 10:35:15 +09002632 ata_link_for_each_dev_reverse(dev, &ap->link) {
Tejun Heof58229f2007-08-06 18:36:23 +09002633 if (tries[dev->devno])
2634 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002635
Tejun Heoe1211e32006-04-01 01:38:18 +09002636 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002637 continue;
2638
Tejun Heobff04642006-11-10 18:08:10 +09002639 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2640 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002641 if (rc)
2642 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002643 }
2644
Alan Coxbe0d18d2007-03-06 02:37:56 -08002645 /* Now ask for the cable type as PDIAG- should have been released */
2646 if (ap->ops->cable_detect)
2647 ap->cbl = ap->ops->cable_detect(ap);
2648
Alan Cox614fe292007-08-22 23:22:45 +01002649 /* We may have SATA bridge glue hiding here irrespective of the
2650 reported cable types and sensed types */
2651 ata_link_for_each_dev(dev, &ap->link) {
2652 if (!ata_dev_enabled(dev))
2653 continue;
2654 /* SATA drives indicate we have a bridge. We don't know which
2655 end of the link the bridge is which is a problem */
2656 if (ata_id_is_sata(dev->id))
2657 ap->cbl = ATA_CBL_SATA;
2658 }
2659
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002660 /* After the identify sequence we can now set up the devices. We do
2661 this in the normal order so that the user doesn't get confused */
2662
Tejun Heof58229f2007-08-06 18:36:23 +09002663 ata_link_for_each_dev(dev, &ap->link) {
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002664 if (!ata_dev_enabled(dev))
2665 continue;
Tejun Heoffeae412006-03-01 16:09:35 +09002666
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002667 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002668 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002669 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002670 if (rc)
2671 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002672 }
2673
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002674 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002675 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002676 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002677 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678
Tejun Heof58229f2007-08-06 18:36:23 +09002679 ata_link_for_each_dev(dev, &ap->link)
2680 if (ata_dev_enabled(dev))
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002681 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002682
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002683 /* no device present, disable port */
2684 ata_port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09002685 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002686
2687 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002688 tries[dev->devno]--;
2689
Tejun Heo14d2bac2006-04-02 17:54:46 +09002690 switch (rc) {
2691 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002692 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002693 tries[dev->devno] = 0;
2694 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002695
2696 case -ENODEV:
2697 /* give it just one more chance */
2698 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002699 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002700 if (tries[dev->devno] == 1) {
2701 /* This is the last chance, better to slow
2702 * down than lose it.
2703 */
Tejun Heo936fd732007-08-06 18:36:23 +09002704 sata_down_spd_limit(&ap->link);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002705 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2706 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002707 }
2708
Tejun Heo4ae72a12007-02-02 16:22:30 +09002709 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002710 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002711
Tejun Heo14d2bac2006-04-02 17:54:46 +09002712 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002713}
2714
2715/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002716 * ata_port_probe - Mark port as enabled
2717 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002719 * Modify @ap data structure such that the system
2720 * thinks that the entire port is enabled.
2721 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002722 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04002723 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 */
2725
2726void ata_port_probe(struct ata_port *ap)
2727{
Tejun Heo198e0fe2006-04-02 18:51:52 +09002728 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729}
2730
2731/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002732 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002733 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002734 *
2735 * This function prints link speed and status of a SATA link.
2736 *
2737 * LOCKING:
2738 * None.
2739 */
Adrian Bunk6bdb4fc2008-04-21 11:51:11 +03002740static void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002741{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002742 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002743
Tejun Heo936fd732007-08-06 18:36:23 +09002744 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002745 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002746 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002747
Tejun Heob1c72912008-07-31 17:02:43 +09002748 if (ata_phys_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002749 tmp = (sstatus >> 4) & 0xf;
Tejun Heo936fd732007-08-06 18:36:23 +09002750 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002751 "SATA link up %s (SStatus %X SControl %X)\n",
2752 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002753 } else {
Tejun Heo936fd732007-08-06 18:36:23 +09002754 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002755 "SATA link down (SStatus %X SControl %X)\n",
2756 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002757 }
2758}
2759
2760/**
Alan Coxebdfca62006-03-23 15:38:34 +00002761 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002762 * @adev: device
2763 *
2764 * Obtain the other device on the same cable, or if none is
2765 * present NULL is returned
2766 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002767
Tejun Heo3373efd2006-05-15 20:57:53 +09002768struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002769{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002770 struct ata_link *link = adev->link;
2771 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002772 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002773 return NULL;
2774 return pair;
2775}
2776
2777/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002778 * ata_port_disable - Disable port.
2779 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002781 * Modify @ap data structure such that the system
2782 * thinks that the entire port is disabled, and should
2783 * never attempt to probe or communicate with devices
2784 * on this port.
2785 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002786 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04002787 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002788 */
2789
2790void ata_port_disable(struct ata_port *ap)
2791{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002792 ap->link.device[0].class = ATA_DEV_NONE;
2793 ap->link.device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09002794 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002795}
2796
Tejun Heo1c3fae42006-04-02 20:53:28 +09002797/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002798 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002799 * @link: Link to adjust SATA spd limit for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002800 *
Tejun Heo936fd732007-08-06 18:36:23 +09002801 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002802 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002803 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002804 *
2805 * LOCKING:
2806 * Inherited from caller.
2807 *
2808 * RETURNS:
2809 * 0 on success, negative errno on failure
2810 */
Tejun Heo936fd732007-08-06 18:36:23 +09002811int sata_down_spd_limit(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002812{
Tejun Heo81952c52006-05-15 20:57:47 +09002813 u32 sstatus, spd, mask;
2814 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002815
Tejun Heo936fd732007-08-06 18:36:23 +09002816 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002817 return -EOPNOTSUPP;
2818
2819 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002820 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002821 */
Tejun Heo936fd732007-08-06 18:36:23 +09002822 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo008a7892007-07-16 14:29:40 +09002823 if (rc == 0)
2824 spd = (sstatus >> 4) & 0xf;
2825 else
Tejun Heo936fd732007-08-06 18:36:23 +09002826 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002827
Tejun Heo936fd732007-08-06 18:36:23 +09002828 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002829 if (mask <= 1)
2830 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002831
2832 /* unconditionally mask off the highest bit */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002833 highbit = fls(mask) - 1;
2834 mask &= ~(1 << highbit);
2835
Tejun Heo008a7892007-07-16 14:29:40 +09002836 /* Mask off all speeds higher than or equal to the current
2837 * one. Force 1.5Gbps if current SPD is not available.
2838 */
2839 if (spd > 1)
2840 mask &= (1 << (spd - 1)) - 1;
2841 else
2842 mask &= 1;
2843
2844 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002845 if (!mask)
2846 return -EINVAL;
2847
Tejun Heo936fd732007-08-06 18:36:23 +09002848 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002849
Tejun Heo936fd732007-08-06 18:36:23 +09002850 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002851 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002852
2853 return 0;
2854}
2855
Tejun Heo936fd732007-08-06 18:36:23 +09002856static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002857{
Tejun Heo52702222007-10-31 10:17:07 +09002858 struct ata_link *host_link = &link->ap->link;
2859 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002860
Tejun Heo52702222007-10-31 10:17:07 +09002861 limit = link->sata_spd_limit;
2862
2863 /* Don't configure downstream link faster than upstream link.
2864 * It doesn't speed up anything and some PMPs choke on such
2865 * configuration.
2866 */
2867 if (!ata_is_host_link(link) && host_link->sata_spd)
2868 limit &= (1 << host_link->sata_spd) - 1;
2869
2870 if (limit == UINT_MAX)
2871 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002872 else
Tejun Heo52702222007-10-31 10:17:07 +09002873 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002874
2875 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002876 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002877
Tejun Heo52702222007-10-31 10:17:07 +09002878 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002879}
2880
2881/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002882 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002883 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002884 *
2885 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002886 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002887 * whether hardreset is necessary to apply SATA spd
2888 * configuration.
2889 *
2890 * LOCKING:
2891 * Inherited from caller.
2892 *
2893 * RETURNS:
2894 * 1 if SATA spd configuration is needed, 0 otherwise.
2895 */
Adrian Bunk1dc55e82008-04-21 11:51:17 +03002896static int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002897{
2898 u32 scontrol;
2899
Tejun Heo936fd732007-08-06 18:36:23 +09002900 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002901 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002902
Tejun Heo936fd732007-08-06 18:36:23 +09002903 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002904}
2905
2906/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002907 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002908 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002909 *
Tejun Heo936fd732007-08-06 18:36:23 +09002910 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002911 *
2912 * LOCKING:
2913 * Inherited from caller.
2914 *
2915 * RETURNS:
2916 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002917 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002918 */
Tejun Heo936fd732007-08-06 18:36:23 +09002919int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002920{
2921 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002922 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002923
Tejun Heo936fd732007-08-06 18:36:23 +09002924 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002925 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002926
Tejun Heo936fd732007-08-06 18:36:23 +09002927 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002928 return 0;
2929
Tejun Heo936fd732007-08-06 18:36:23 +09002930 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002931 return rc;
2932
Tejun Heo1c3fae42006-04-02 20:53:28 +09002933 return 1;
2934}
2935
Alan Cox452503f2005-10-21 19:01:32 -04002936/*
2937 * This mode timing computation functionality is ported over from
2938 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2939 */
2940/*
Alan Coxb352e572006-08-10 18:52:12 +01002941 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002942 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002943 * for UDMA6, which is currently supported only by Maxtor drives.
2944 *
2945 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002946 */
2947
2948static const struct ata_timing ata_timing[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +09002949/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2950 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2951 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2952 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2953 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2954 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2955 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2956 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002957
Tejun Heo70cd0712007-11-27 19:43:40 +09002958 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2959 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2960 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002961
Tejun Heo70cd0712007-11-27 19:43:40 +09002962 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2963 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2964 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
Alan Coxb352e572006-08-10 18:52:12 +01002965 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Tejun Heo70cd0712007-11-27 19:43:40 +09002966 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002967
2968/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Tejun Heo70cd0712007-11-27 19:43:40 +09002969 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2970 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2971 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2972 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2973 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2974 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2975 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002976
2977 { 0xFF }
2978};
2979
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002980#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2981#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002982
2983static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2984{
2985 q->setup = EZ(t->setup * 1000, T);
2986 q->act8b = EZ(t->act8b * 1000, T);
2987 q->rec8b = EZ(t->rec8b * 1000, T);
2988 q->cyc8b = EZ(t->cyc8b * 1000, T);
2989 q->active = EZ(t->active * 1000, T);
2990 q->recover = EZ(t->recover * 1000, T);
2991 q->cycle = EZ(t->cycle * 1000, T);
2992 q->udma = EZ(t->udma * 1000, UT);
2993}
2994
2995void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2996 struct ata_timing *m, unsigned int what)
2997{
2998 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2999 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3000 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3001 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3002 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3003 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
3004 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3005 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3006}
3007
Tejun Heo63573572007-11-27 19:43:39 +09003008const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04003009{
Tejun Heo70cd0712007-11-27 19:43:40 +09003010 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04003011
Tejun Heo70cd0712007-11-27 19:43:40 +09003012 while (xfer_mode > t->mode)
3013 t++;
3014
3015 if (xfer_mode == t->mode)
3016 return t;
3017 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04003018}
3019
3020int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3021 struct ata_timing *t, int T, int UT)
3022{
3023 const struct ata_timing *s;
3024 struct ata_timing p;
3025
3026 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003027 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08003028 */
Alan Cox452503f2005-10-21 19:01:32 -04003029
3030 if (!(s = ata_timing_find_mode(speed)))
3031 return -EINVAL;
3032
Albert Lee75b1f2f2005-11-16 17:06:18 +08003033 memcpy(t, s, sizeof(*s));
3034
Alan Cox452503f2005-10-21 19:01:32 -04003035 /*
3036 * If the drive is an EIDE drive, it can tell us it needs extended
3037 * PIO/MW_DMA cycle timing.
3038 */
3039
3040 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3041 memset(&p, 0, sizeof(p));
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003042 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
Alan Cox452503f2005-10-21 19:01:32 -04003043 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
3044 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003045 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
Alan Cox452503f2005-10-21 19:01:32 -04003046 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
3047 }
3048 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3049 }
3050
3051 /*
3052 * Convert the timing to bus clock counts.
3053 */
3054
Albert Lee75b1f2f2005-11-16 17:06:18 +08003055 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04003056
3057 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003058 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3059 * S.M.A.R.T * and some other commands. We have to ensure that the
3060 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04003061 */
3062
Alanfd3367a2006-12-07 12:41:18 +00003063 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04003064 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3065 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3066 }
3067
3068 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003069 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04003070 */
3071
3072 if (t->act8b + t->rec8b < t->cyc8b) {
3073 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3074 t->rec8b = t->cyc8b - t->act8b;
3075 }
3076
3077 if (t->active + t->recover < t->cycle) {
3078 t->active += (t->cycle - (t->active + t->recover)) / 2;
3079 t->recover = t->cycle - t->active;
3080 }
Jeff Garzika617c092007-05-21 20:14:23 -04003081
Alan Cox4f701d12007-04-23 11:55:36 +01003082 /* In a few cases quantisation may produce enough errors to
3083 leave t->cycle too low for the sum of active and recovery
3084 if so we must correct this */
3085 if (t->active + t->recover > t->cycle)
3086 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04003087
3088 return 0;
3089}
3090
Tejun Heocf176e12006-04-02 17:54:46 +09003091/**
Tejun Heoa0f79b92007-12-18 16:33:05 +09003092 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3093 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3094 * @cycle: cycle duration in ns
3095 *
3096 * Return matching xfer mode for @cycle. The returned mode is of
3097 * the transfer type specified by @xfer_shift. If @cycle is too
3098 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3099 * than the fastest known mode, the fasted mode is returned.
3100 *
3101 * LOCKING:
3102 * None.
3103 *
3104 * RETURNS:
3105 * Matching xfer_mode, 0xff if no match found.
3106 */
3107u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3108{
3109 u8 base_mode = 0xff, last_mode = 0xff;
3110 const struct ata_xfer_ent *ent;
3111 const struct ata_timing *t;
3112
3113 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3114 if (ent->shift == xfer_shift)
3115 base_mode = ent->base;
3116
3117 for (t = ata_timing_find_mode(base_mode);
3118 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3119 unsigned short this_cycle;
3120
3121 switch (xfer_shift) {
3122 case ATA_SHIFT_PIO:
3123 case ATA_SHIFT_MWDMA:
3124 this_cycle = t->cycle;
3125 break;
3126 case ATA_SHIFT_UDMA:
3127 this_cycle = t->udma;
3128 break;
3129 default:
3130 return 0xff;
3131 }
3132
3133 if (cycle > this_cycle)
3134 break;
3135
3136 last_mode = t->mode;
3137 }
3138
3139 return last_mode;
3140}
3141
3142/**
Tejun Heocf176e12006-04-02 17:54:46 +09003143 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09003144 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09003145 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09003146 *
3147 * Adjust xfer masks of @dev downward. Note that this function
3148 * does not apply the change. Invoking ata_set_mode() afterwards
3149 * will apply the limit.
3150 *
3151 * LOCKING:
3152 * Inherited from caller.
3153 *
3154 * RETURNS:
3155 * 0 on success, negative errno on failure
3156 */
Tejun Heo458337d2007-02-02 16:22:30 +09003157int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09003158{
Tejun Heo458337d2007-02-02 16:22:30 +09003159 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09003160 unsigned long orig_mask, xfer_mask;
3161 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09003162 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09003163
Tejun Heo458337d2007-02-02 16:22:30 +09003164 quiet = !!(sel & ATA_DNXFER_QUIET);
3165 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09003166
Tejun Heo458337d2007-02-02 16:22:30 +09003167 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3168 dev->mwdma_mask,
3169 dev->udma_mask);
3170 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09003171
Tejun Heo458337d2007-02-02 16:22:30 +09003172 switch (sel) {
3173 case ATA_DNXFER_PIO:
3174 highbit = fls(pio_mask) - 1;
3175 pio_mask &= ~(1 << highbit);
3176 break;
3177
3178 case ATA_DNXFER_DMA:
3179 if (udma_mask) {
3180 highbit = fls(udma_mask) - 1;
3181 udma_mask &= ~(1 << highbit);
3182 if (!udma_mask)
3183 return -ENOENT;
3184 } else if (mwdma_mask) {
3185 highbit = fls(mwdma_mask) - 1;
3186 mwdma_mask &= ~(1 << highbit);
3187 if (!mwdma_mask)
3188 return -ENOENT;
3189 }
3190 break;
3191
3192 case ATA_DNXFER_40C:
3193 udma_mask &= ATA_UDMA_MASK_40C;
3194 break;
3195
3196 case ATA_DNXFER_FORCE_PIO0:
3197 pio_mask &= 1;
3198 case ATA_DNXFER_FORCE_PIO:
3199 mwdma_mask = 0;
3200 udma_mask = 0;
3201 break;
3202
Tejun Heo458337d2007-02-02 16:22:30 +09003203 default:
3204 BUG();
3205 }
3206
3207 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3208
3209 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3210 return -ENOENT;
3211
3212 if (!quiet) {
3213 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3214 snprintf(buf, sizeof(buf), "%s:%s",
3215 ata_mode_string(xfer_mask),
3216 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3217 else
3218 snprintf(buf, sizeof(buf), "%s",
3219 ata_mode_string(xfer_mask));
3220
3221 ata_dev_printk(dev, KERN_WARNING,
3222 "limiting speed to %s\n", buf);
3223 }
Tejun Heocf176e12006-04-02 17:54:46 +09003224
3225 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3226 &dev->udma_mask);
3227
Tejun Heocf176e12006-04-02 17:54:46 +09003228 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09003229}
3230
Tejun Heo3373efd2006-05-15 20:57:53 +09003231static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003233 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo4055dee2008-02-07 10:34:08 +09003234 const char *dev_err_whine = "";
3235 int ign_dev_err = 0;
Tejun Heo83206a22006-03-24 15:25:31 +09003236 unsigned int err_mask;
3237 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003238
Tejun Heoe8384602006-04-02 18:51:53 +09003239 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 if (dev->xfer_shift == ATA_SHIFT_PIO)
3241 dev->flags |= ATA_DFLAG_PIO;
3242
Tejun Heo3373efd2006-05-15 20:57:53 +09003243 err_mask = ata_dev_set_xfermode(dev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003244
Tejun Heo4055dee2008-02-07 10:34:08 +09003245 if (err_mask & ~AC_ERR_DEV)
3246 goto fail;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003247
Tejun Heo4055dee2008-02-07 10:34:08 +09003248 /* revalidate */
Tejun Heobaa1e782006-11-01 18:39:27 +09003249 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003250 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003251 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003252 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003253 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003254
Alan Coxb93fda12008-04-08 16:36:44 +01003255 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3256 /* Old CFA may refuse this command, which is just fine */
3257 if (ata_id_is_cfa(dev->id))
3258 ign_dev_err = 1;
3259 /* Catch several broken garbage emulations plus some pre
3260 ATA devices */
3261 if (ata_id_major_version(dev->id) == 0 &&
3262 dev->pio_mode <= XFER_PIO_2)
3263 ign_dev_err = 1;
3264 /* Some very old devices and some bad newer ones fail
3265 any kind of SET_XFERMODE request but support PIO0-2
3266 timings and no IORDY */
3267 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3268 ign_dev_err = 1;
3269 }
Tejun Heo4055dee2008-02-07 10:34:08 +09003270 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3271 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3272 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3273 dev->dma_mode == XFER_MW_DMA_0 &&
3274 (dev->id[63] >> 8) & 1)
3275 ign_dev_err = 1;
3276
3277 /* if the device is actually configured correctly, ignore dev err */
3278 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3279 ign_dev_err = 1;
3280
3281 if (err_mask & AC_ERR_DEV) {
3282 if (!ign_dev_err)
3283 goto fail;
3284 else
3285 dev_err_whine = " (device error ignored)";
3286 }
3287
Tejun Heo23e71c32006-03-06 04:31:57 +09003288 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3289 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003290
Tejun Heo4055dee2008-02-07 10:34:08 +09003291 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3292 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3293 dev_err_whine);
3294
Tejun Heo83206a22006-03-24 15:25:31 +09003295 return 0;
Tejun Heo4055dee2008-02-07 10:34:08 +09003296
3297 fail:
3298 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3299 "(err_mask=0x%x)\n", err_mask);
3300 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003301}
3302
Linus Torvalds1da177e2005-04-16 15:20:36 -07003303/**
Alan04351822007-03-06 02:37:52 -08003304 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003305 * @link: link on which timings will be programmed
Joe Perches1967b7f2008-02-03 17:08:11 +02003306 * @r_failed_dev: out parameter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003307 *
Alan04351822007-03-06 02:37:52 -08003308 * Standard implementation of the function used to tune and set
3309 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3310 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003311 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003312 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003313 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003314 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003315 *
3316 * RETURNS:
3317 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003318 */
Alan04351822007-03-06 02:37:52 -08003319
Tejun Heo02607312007-08-06 18:36:23 +09003320int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321{
Tejun Heo02607312007-08-06 18:36:23 +09003322 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003323 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003324 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003325
Tejun Heoa6d5a512006-03-06 04:31:57 +09003326 /* step 1: calculate xfer_mask */
Tejun Heof58229f2007-08-06 18:36:23 +09003327 ata_link_for_each_dev(dev, link) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003328 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003329 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003330
Tejun Heoe1211e32006-04-01 01:38:18 +09003331 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09003332 continue;
3333
Alan Coxb3a70602007-10-02 12:38:26 -04003334 mode_mask = ATA_DMA_MASK_ATA;
3335 if (dev->class == ATA_DEV_ATAPI)
3336 mode_mask = ATA_DMA_MASK_ATAPI;
3337 else if (ata_id_is_cfa(dev->id))
3338 mode_mask = ATA_DMA_MASK_CFA;
3339
Tejun Heo3373efd2006-05-15 20:57:53 +09003340 ata_dev_xfermask(dev);
Tejun Heo33267322008-02-13 09:15:09 +09003341 ata_force_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003342
Tejun Heoacf356b2006-03-24 14:07:50 +09003343 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3344 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003345
3346 if (libata_dma_mask & mode_mask)
3347 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3348 else
3349 dma_mask = 0;
3350
Tejun Heoacf356b2006-03-24 14:07:50 +09003351 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3352 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003353
Tejun Heo4f659772006-04-01 01:38:18 +09003354 found = 1;
Alan Coxb15b3eb2008-08-01 09:18:34 +01003355 if (ata_dma_enabled(dev))
Alan Cox5444a6f2006-03-27 18:58:20 +01003356 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003357 }
Tejun Heo4f659772006-04-01 01:38:18 +09003358 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003359 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003360
3361 /* step 2: always set host PIO timings */
Tejun Heof58229f2007-08-06 18:36:23 +09003362 ata_link_for_each_dev(dev, link) {
Tejun Heoe8e06192006-04-01 01:38:18 +09003363 if (!ata_dev_enabled(dev))
3364 continue;
3365
Tejun Heo70cd0712007-11-27 19:43:40 +09003366 if (dev->pio_mode == 0xff) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003367 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003368 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003369 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003370 }
3371
3372 dev->xfer_mode = dev->pio_mode;
3373 dev->xfer_shift = ATA_SHIFT_PIO;
3374 if (ap->ops->set_piomode)
3375 ap->ops->set_piomode(ap, dev);
3376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003377
Tejun Heoa6d5a512006-03-06 04:31:57 +09003378 /* step 3: set host DMA timings */
Tejun Heof58229f2007-08-06 18:36:23 +09003379 ata_link_for_each_dev(dev, link) {
Alan Coxb15b3eb2008-08-01 09:18:34 +01003380 if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev))
Tejun Heoe8e06192006-04-01 01:38:18 +09003381 continue;
3382
3383 dev->xfer_mode = dev->dma_mode;
3384 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3385 if (ap->ops->set_dmamode)
3386 ap->ops->set_dmamode(ap, dev);
3387 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388
3389 /* step 4: update devices' xfer mode */
Tejun Heof58229f2007-08-06 18:36:23 +09003390 ata_link_for_each_dev(dev, link) {
Alan18d90de2007-01-24 11:42:38 +00003391 /* don't update suspended devices' xfer mode */
Tejun Heo9666f402007-05-04 21:27:47 +02003392 if (!ata_dev_enabled(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09003393 continue;
3394
Tejun Heo3373efd2006-05-15 20:57:53 +09003395 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003396 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003397 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003398 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399
Tejun Heoe8e06192006-04-01 01:38:18 +09003400 /* Record simplex status. If we selected DMA then the other
3401 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003402 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003403 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003404 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003405
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003406 out:
3407 if (rc)
3408 *r_failed_dev = dev;
3409 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410}
3411
3412/**
Tejun Heoaa2731a2008-04-07 22:47:19 +09003413 * ata_wait_ready - wait for link to become ready
3414 * @link: link to be waited on
3415 * @deadline: deadline jiffies for the operation
3416 * @check_ready: callback to check link readiness
3417 *
3418 * Wait for @link to become ready. @check_ready should return
3419 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3420 * link doesn't seem to be occupied, other errno for other error
3421 * conditions.
3422 *
3423 * Transient -ENODEV conditions are allowed for
3424 * ATA_TMOUT_FF_WAIT.
3425 *
3426 * LOCKING:
3427 * EH context.
3428 *
3429 * RETURNS:
3430 * 0 if @linke is ready before @deadline; otherwise, -errno.
3431 */
3432int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3433 int (*check_ready)(struct ata_link *link))
3434{
3435 unsigned long start = jiffies;
Tejun Heo341c2c92008-05-20 02:17:51 +09003436 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003437 int warned = 0;
3438
Tejun Heob1c72912008-07-31 17:02:43 +09003439 /* Slave readiness can't be tested separately from master. On
3440 * M/S emulation configuration, this function should be called
3441 * only on the master and it will handle both master and slave.
3442 */
3443 WARN_ON(link == link->ap->slave_link);
3444
Tejun Heoaa2731a2008-04-07 22:47:19 +09003445 if (time_after(nodev_deadline, deadline))
3446 nodev_deadline = deadline;
3447
3448 while (1) {
3449 unsigned long now = jiffies;
3450 int ready, tmp;
3451
3452 ready = tmp = check_ready(link);
3453 if (ready > 0)
3454 return 0;
3455
3456 /* -ENODEV could be transient. Ignore -ENODEV if link
3457 * is online. Also, some SATA devices take a long
3458 * time to clear 0xff after reset. For example,
3459 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3460 * GoVault needs even more than that. Wait for
3461 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3462 *
3463 * Note that some PATA controllers (pata_ali) explode
3464 * if status register is read more than once when
3465 * there's no device attached.
3466 */
3467 if (ready == -ENODEV) {
3468 if (ata_link_online(link))
3469 ready = 0;
3470 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3471 !ata_link_offline(link) &&
3472 time_before(now, nodev_deadline))
3473 ready = 0;
3474 }
3475
3476 if (ready)
3477 return ready;
3478 if (time_after(now, deadline))
3479 return -EBUSY;
3480
3481 if (!warned && time_after(now, start + 5 * HZ) &&
3482 (deadline - now > 3 * HZ)) {
3483 ata_link_printk(link, KERN_WARNING,
3484 "link is slow to respond, please be patient "
3485 "(ready=%d)\n", tmp);
3486 warned = 1;
3487 }
3488
3489 msleep(50);
3490 }
3491}
3492
3493/**
3494 * ata_wait_after_reset - wait for link to become ready after reset
3495 * @link: link to be waited on
3496 * @deadline: deadline jiffies for the operation
3497 * @check_ready: callback to check link readiness
3498 *
3499 * Wait for @link to become ready after reset.
3500 *
3501 * LOCKING:
3502 * EH context.
3503 *
3504 * RETURNS:
3505 * 0 if @linke is ready before @deadline; otherwise, -errno.
3506 */
Harvey Harrison2b4221b2008-04-24 18:37:34 -07003507int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
Tejun Heoaa2731a2008-04-07 22:47:19 +09003508 int (*check_ready)(struct ata_link *link))
3509{
Tejun Heo341c2c92008-05-20 02:17:51 +09003510 msleep(ATA_WAIT_AFTER_RESET);
Tejun Heoaa2731a2008-04-07 22:47:19 +09003511
3512 return ata_wait_ready(link, deadline, check_ready);
3513}
3514
3515/**
Tejun Heo936fd732007-08-06 18:36:23 +09003516 * sata_link_debounce - debounce SATA phy status
3517 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003518 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003519 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003520 *
Tejun Heo936fd732007-08-06 18:36:23 +09003521* Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003522 * holding the same value where DET is not 1 for @duration polled
3523 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003524 * beginning of the stable state. Because DET gets stuck at 1 on
3525 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003526 * until timeout then returns 0 if DET is stable at 1.
3527 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003528 * @timeout is further limited by @deadline. The sooner of the
3529 * two is used.
3530 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003531 * LOCKING:
3532 * Kernel thread context (may sleep)
3533 *
3534 * RETURNS:
3535 * 0 on success, -errno on failure.
3536 */
Tejun Heo936fd732007-08-06 18:36:23 +09003537int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3538 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003539{
Tejun Heo341c2c92008-05-20 02:17:51 +09003540 unsigned long interval = params[0];
3541 unsigned long duration = params[1];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003542 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003543 u32 last, cur;
3544 int rc;
3545
Tejun Heo341c2c92008-05-20 02:17:51 +09003546 t = ata_deadline(jiffies, params[2]);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003547 if (time_before(t, deadline))
3548 deadline = t;
3549
Tejun Heo936fd732007-08-06 18:36:23 +09003550 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003551 return rc;
3552 cur &= 0xf;
3553
3554 last = cur;
3555 last_jiffies = jiffies;
3556
3557 while (1) {
Tejun Heo341c2c92008-05-20 02:17:51 +09003558 msleep(interval);
Tejun Heo936fd732007-08-06 18:36:23 +09003559 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003560 return rc;
3561 cur &= 0xf;
3562
3563 /* DET stable? */
3564 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003565 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003566 continue;
Tejun Heo341c2c92008-05-20 02:17:51 +09003567 if (time_after(jiffies,
3568 ata_deadline(last_jiffies, duration)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003569 return 0;
3570 continue;
3571 }
3572
3573 /* unstable, start over */
3574 last = cur;
3575 last_jiffies = jiffies;
3576
Tejun Heof1545152007-07-16 14:29:40 +09003577 /* Check deadline. If debouncing failed, return
3578 * -EPIPE to tell upper layer to lower link speed.
3579 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003580 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003581 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003582 }
3583}
3584
3585/**
Tejun Heo936fd732007-08-06 18:36:23 +09003586 * sata_link_resume - resume SATA link
3587 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003588 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003589 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003590 *
Tejun Heo936fd732007-08-06 18:36:23 +09003591 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003592 *
3593 * LOCKING:
3594 * Kernel thread context (may sleep)
3595 *
3596 * RETURNS:
3597 * 0 on success, -errno on failure.
3598 */
Tejun Heo936fd732007-08-06 18:36:23 +09003599int sata_link_resume(struct ata_link *link, const unsigned long *params,
3600 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003601{
Tejun Heoac371982008-04-07 22:47:19 +09003602 u32 scontrol, serror;
Tejun Heo81952c52006-05-15 20:57:47 +09003603 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003604
Tejun Heo936fd732007-08-06 18:36:23 +09003605 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003606 return rc;
3607
Tejun Heo852ee162006-04-01 01:38:18 +09003608 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09003609
Tejun Heo936fd732007-08-06 18:36:23 +09003610 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003611 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003612
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003613 /* Some PHYs react badly if SStatus is pounded immediately
3614 * after resuming. Delay 200ms before debouncing.
3615 */
3616 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003617
Tejun Heoac371982008-04-07 22:47:19 +09003618 if ((rc = sata_link_debounce(link, params, deadline)))
3619 return rc;
3620
Tejun Heof0465192008-05-19 01:15:08 +09003621 /* clear SError, some PHYs require this even for SRST to work */
Tejun Heoac371982008-04-07 22:47:19 +09003622 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3623 rc = sata_scr_write(link, SCR_ERROR, serror);
Tejun Heoac371982008-04-07 22:47:19 +09003624
Tejun Heof0465192008-05-19 01:15:08 +09003625 return rc != -EINVAL ? rc : 0;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003626}
3627
Tejun Heof5914a42006-05-31 18:27:48 +09003628/**
Tejun Heo0aa11132008-04-07 22:47:18 +09003629 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003630 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003631 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003632 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003633 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003634 * prereset makes libata abort whole reset sequence and give up
3635 * that port, so prereset should be best-effort. It does its
3636 * best to prepare for reset sequence but if things go wrong, it
3637 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003638 *
3639 * LOCKING:
3640 * Kernel thread context (may sleep)
3641 *
3642 * RETURNS:
3643 * 0 on success, -errno otherwise.
3644 */
Tejun Heo0aa11132008-04-07 22:47:18 +09003645int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003646{
Tejun Heocc0680a2007-08-06 18:36:23 +09003647 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003648 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003649 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003650 int rc;
3651
Tejun Heof5914a42006-05-31 18:27:48 +09003652 /* if we're about to do hardreset, nothing more to do */
3653 if (ehc->i.action & ATA_EH_HARDRESET)
3654 return 0;
3655
Tejun Heo936fd732007-08-06 18:36:23 +09003656 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003657 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003658 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003659 /* whine about phy resume failure but proceed */
3660 if (rc && rc != -EOPNOTSUPP)
Tejun Heocc0680a2007-08-06 18:36:23 +09003661 ata_link_printk(link, KERN_WARNING, "failed to resume "
Tejun Heof5914a42006-05-31 18:27:48 +09003662 "link for reset (errno=%d)\n", rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003663 }
3664
Tejun Heo45db2f62008-04-08 01:46:56 +09003665 /* no point in trying softreset on offline link */
Tejun Heob1c72912008-07-31 17:02:43 +09003666 if (ata_phys_link_offline(link))
Tejun Heo45db2f62008-04-08 01:46:56 +09003667 ehc->i.action &= ~ATA_EH_SOFTRESET;
3668
Tejun Heof5914a42006-05-31 18:27:48 +09003669 return 0;
3670}
3671
Tejun Heoc2bd5802006-01-24 17:05:22 +09003672/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003673 * sata_link_hardreset - reset link via SATA phy reset
3674 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003675 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003676 * @deadline: deadline jiffies for the operation
Tejun Heo9dadd452008-04-07 22:47:19 +09003677 * @online: optional out parameter indicating link onlineness
3678 * @check_ready: optional callback to check link readiness
Tejun Heoc2bd5802006-01-24 17:05:22 +09003679 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003680 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heo9dadd452008-04-07 22:47:19 +09003681 * After hardreset, link readiness is waited upon using
3682 * ata_wait_ready() if @check_ready is specified. LLDs are
3683 * allowed to not specify @check_ready and wait itself after this
3684 * function returns. Device classification is LLD's
3685 * responsibility.
3686 *
3687 * *@online is set to one iff reset succeeded and @link is online
3688 * after reset.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003689 *
3690 * LOCKING:
3691 * Kernel thread context (may sleep)
3692 *
3693 * RETURNS:
3694 * 0 on success, -errno otherwise.
3695 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003696int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heo9dadd452008-04-07 22:47:19 +09003697 unsigned long deadline,
3698 bool *online, int (*check_ready)(struct ata_link *))
Tejun Heoc2bd5802006-01-24 17:05:22 +09003699{
Tejun Heo852ee162006-04-01 01:38:18 +09003700 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003701 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003702
Tejun Heoc2bd5802006-01-24 17:05:22 +09003703 DPRINTK("ENTER\n");
3704
Tejun Heo9dadd452008-04-07 22:47:19 +09003705 if (online)
3706 *online = false;
3707
Tejun Heo936fd732007-08-06 18:36:23 +09003708 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003709 /* SATA spec says nothing about how to reconfigure
3710 * spd. To be on the safe side, turn off phy during
3711 * reconfiguration. This works for at least ICH7 AHCI
3712 * and Sil3124.
3713 */
Tejun Heo936fd732007-08-06 18:36:23 +09003714 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003715 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003716
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003717 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003718
Tejun Heo936fd732007-08-06 18:36:23 +09003719 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003720 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003721
Tejun Heo936fd732007-08-06 18:36:23 +09003722 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003723 }
3724
3725 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003726 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003727 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003728
Tejun Heo852ee162006-04-01 01:38:18 +09003729 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003730
Tejun Heo936fd732007-08-06 18:36:23 +09003731 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003732 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003733
Tejun Heo1c3fae42006-04-02 20:53:28 +09003734 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003735 * 10.4.2 says at least 1 ms.
3736 */
3737 msleep(1);
3738
Tejun Heo936fd732007-08-06 18:36:23 +09003739 /* bring link back */
3740 rc = sata_link_resume(link, timing, deadline);
Tejun Heo9dadd452008-04-07 22:47:19 +09003741 if (rc)
3742 goto out;
3743 /* if link is offline nothing more to do */
Tejun Heob1c72912008-07-31 17:02:43 +09003744 if (ata_phys_link_offline(link))
Tejun Heo9dadd452008-04-07 22:47:19 +09003745 goto out;
3746
3747 /* Link is online. From this point, -ENODEV too is an error. */
3748 if (online)
3749 *online = true;
3750
Tejun Heo071f44b2008-04-07 22:47:22 +09003751 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
Tejun Heo9dadd452008-04-07 22:47:19 +09003752 /* If PMP is supported, we have to do follow-up SRST.
3753 * Some PMPs don't send D2H Reg FIS after hardreset if
3754 * the first port is empty. Wait only for
3755 * ATA_TMOUT_PMP_SRST_WAIT.
3756 */
3757 if (check_ready) {
3758 unsigned long pmp_deadline;
3759
Tejun Heo341c2c92008-05-20 02:17:51 +09003760 pmp_deadline = ata_deadline(jiffies,
3761 ATA_TMOUT_PMP_SRST_WAIT);
Tejun Heo9dadd452008-04-07 22:47:19 +09003762 if (time_after(pmp_deadline, deadline))
3763 pmp_deadline = deadline;
3764 ata_wait_ready(link, pmp_deadline, check_ready);
3765 }
3766 rc = -EAGAIN;
3767 goto out;
3768 }
3769
3770 rc = 0;
3771 if (check_ready)
3772 rc = ata_wait_ready(link, deadline, check_ready);
Tejun Heob6103f62006-11-01 17:59:53 +09003773 out:
Tejun Heo0cbf0712008-05-19 01:15:05 +09003774 if (rc && rc != -EAGAIN) {
3775 /* online is set iff link is online && reset succeeded */
3776 if (online)
3777 *online = false;
Tejun Heo9dadd452008-04-07 22:47:19 +09003778 ata_link_printk(link, KERN_ERR,
3779 "COMRESET failed (errno=%d)\n", rc);
Tejun Heo0cbf0712008-05-19 01:15:05 +09003780 }
Tejun Heob6103f62006-11-01 17:59:53 +09003781 DPRINTK("EXIT, rc=%d\n", rc);
3782 return rc;
3783}
3784
3785/**
Tejun Heo57c9efd2008-04-07 22:47:19 +09003786 * sata_std_hardreset - COMRESET w/o waiting or classification
3787 * @link: link to reset
3788 * @class: resulting class of attached device
3789 * @deadline: deadline jiffies for the operation
3790 *
3791 * Standard SATA COMRESET w/o waiting or classification.
3792 *
3793 * LOCKING:
3794 * Kernel thread context (may sleep)
3795 *
3796 * RETURNS:
3797 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3798 */
3799int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3800 unsigned long deadline)
3801{
3802 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3803 bool online;
3804 int rc;
3805
3806 /* do hardreset */
3807 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
Tejun Heo57c9efd2008-04-07 22:47:19 +09003808 return online ? -EAGAIN : rc;
3809}
3810
3811/**
Tejun Heo203c75b2008-04-07 22:47:18 +09003812 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003813 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003814 * @classes: classes of attached devices
3815 *
3816 * This function is invoked after a successful reset. Note that
3817 * the device might have been reset more than once using
3818 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003819 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003820 * LOCKING:
3821 * Kernel thread context (may sleep)
3822 */
Tejun Heo203c75b2008-04-07 22:47:18 +09003823void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003824{
Tejun Heof0465192008-05-19 01:15:08 +09003825 u32 serror;
3826
Tejun Heoc2bd5802006-01-24 17:05:22 +09003827 DPRINTK("ENTER\n");
3828
Tejun Heof0465192008-05-19 01:15:08 +09003829 /* reset complete, clear SError */
3830 if (!sata_scr_read(link, SCR_ERROR, &serror))
3831 sata_scr_write(link, SCR_ERROR, serror);
3832
Tejun Heoc2bd5802006-01-24 17:05:22 +09003833 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003834 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003835
Tejun Heoc2bd5802006-01-24 17:05:22 +09003836 DPRINTK("EXIT\n");
3837}
3838
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003839/**
Tejun Heo623a3122006-03-05 17:55:58 +09003840 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003841 * @dev: device to compare against
3842 * @new_class: class of the new device
3843 * @new_id: IDENTIFY page of the new device
3844 *
3845 * Compare @new_class and @new_id against @dev and determine
3846 * whether @dev is the device indicated by @new_class and
3847 * @new_id.
3848 *
3849 * LOCKING:
3850 * None.
3851 *
3852 * RETURNS:
3853 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3854 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003855static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3856 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003857{
3858 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003859 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3860 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003861
3862 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003863 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3864 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003865 return 0;
3866 }
3867
Tejun Heoa0cf7332007-01-02 20:18:49 +09003868 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3869 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3870 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3871 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003872
3873 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003874 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3875 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003876 return 0;
3877 }
3878
3879 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003880 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3881 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003882 return 0;
3883 }
3884
Tejun Heo623a3122006-03-05 17:55:58 +09003885 return 1;
3886}
3887
3888/**
Tejun Heofe309112007-05-15 03:28:15 +09003889 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003890 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003891 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003892 *
3893 * Re-read IDENTIFY page and make sure @dev is still attached to
3894 * the port.
3895 *
3896 * LOCKING:
3897 * Kernel thread context (may sleep)
3898 *
3899 * RETURNS:
3900 * 0 on success, negative errno otherwise
3901 */
Tejun Heofe309112007-05-15 03:28:15 +09003902int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003903{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003904 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003905 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003906 int rc;
3907
Tejun Heofe635c72006-05-15 20:57:35 +09003908 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003909 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003910 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003911 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003912
3913 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003914 if (!ata_dev_same_device(dev, class, id))
3915 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003916
Tejun Heofe635c72006-05-15 20:57:35 +09003917 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003918 return 0;
3919}
3920
3921/**
3922 * ata_dev_revalidate - Revalidate ATA device
3923 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09003924 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09003925 * @readid_flags: read ID flags
3926 *
3927 * Re-read IDENTIFY page, make sure @dev is still attached to the
3928 * port and reconfigure it according to the new IDENTIFY page.
3929 *
3930 * LOCKING:
3931 * Kernel thread context (may sleep)
3932 *
3933 * RETURNS:
3934 * 0 on success, negative errno otherwise
3935 */
Tejun Heo422c9da2007-09-23 13:14:12 +09003936int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3937 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09003938{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003939 u64 n_sectors = dev->n_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003940 int rc;
3941
3942 if (!ata_dev_enabled(dev))
3943 return -ENODEV;
3944
Tejun Heo422c9da2007-09-23 13:14:12 +09003945 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3946 if (ata_class_enabled(new_class) &&
3947 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
3948 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
3949 dev->class, new_class);
3950 rc = -ENODEV;
3951 goto fail;
3952 }
3953
Tejun Heofe309112007-05-15 03:28:15 +09003954 /* re-read ID */
3955 rc = ata_dev_reread_id(dev, readid_flags);
3956 if (rc)
3957 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09003958
3959 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003960 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003961 if (rc)
3962 goto fail;
3963
3964 /* verify n_sectors hasn't changed */
Tejun Heob54eebd2007-08-17 18:46:51 +09003965 if (dev->class == ATA_DEV_ATA && n_sectors &&
3966 dev->n_sectors != n_sectors) {
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003967 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3968 "%llu != %llu\n",
3969 (unsigned long long)n_sectors,
3970 (unsigned long long)dev->n_sectors);
Tejun Heo8270bec2007-08-16 03:02:22 +09003971
3972 /* restore original n_sectors */
3973 dev->n_sectors = n_sectors;
3974
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003975 rc = -ENODEV;
3976 goto fail;
3977 }
3978
3979 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09003980
3981 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09003982 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09003983 return rc;
3984}
3985
Alan Cox6919a0a2006-10-27 19:08:46 -07003986struct ata_blacklist_entry {
3987 const char *model_num;
3988 const char *model_rev;
3989 unsigned long horkage;
3990};
3991
3992static const struct ata_blacklist_entry ata_device_blacklist [] = {
3993 /* Devices with DMA related problems under Linux */
3994 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3995 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3996 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3997 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3998 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3999 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4000 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4001 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4002 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4003 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4004 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4005 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4006 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4007 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4008 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4009 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4010 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4011 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4012 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4013 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4014 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4015 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4016 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4017 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4018 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4019 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004020 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4021 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004022 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004023 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004024 /* Odd clown on sil3726/4726 PMPs */
Tejun Heo50af2fa2008-05-19 01:15:14 +09004025 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
Alan Cox6919a0a2006-10-27 19:08:46 -07004026
Albert Lee18d6e9d2007-04-02 11:34:15 +08004027 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004028 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Tejun Heo6a87e422008-11-03 19:01:09 +09004029 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004030
Alan Cox6919a0a2006-10-27 19:08:46 -07004031 /* Devices we expect to fail diagnostics */
4032
4033 /* Devices where NCQ should be avoided */
4034 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004035 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004036 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004037 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4038 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004039 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004040 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004041 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004042 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004043 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004044
Robert Hancock36e337d2007-04-02 22:05:29 -06004045 /* Blacklist entries taken from Silicon Image 3124/3132
4046 Windows driver .inf file - also several Linux problem reports */
4047 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4048 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4049 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004050
Tejun Heo16c55b02007-08-29 11:58:33 +09004051 /* devices which puke on READ_NATIVE_MAX */
4052 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4053 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4054 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4055 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004056
Alan Cox93328e12007-09-29 04:06:48 -04004057 /* Devices which report 1 sector over size HPA */
4058 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4059 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
Mikko Rapelib152fcd2008-02-19 01:41:25 +01004060 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
Alan Cox93328e12007-09-29 04:06:48 -04004061
Alan Cox6bbfd532007-11-05 22:58:58 +00004062 /* Devices which get the IVB wrong */
4063 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
Alan Coxa79067e2008-04-29 14:08:36 +01004064 /* Maybe we should just blacklist TSSTcorp... */
4065 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4066 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004067 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
Peter Missele9f33402007-11-27 18:04:42 +01004068 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4069 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4070 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004071
Jens Axboe9ce8e302008-08-27 15:23:18 +02004072 /* Devices that do not need bridging limits applied */
4073 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4074
Alan Cox6919a0a2006-10-27 19:08:46 -07004075 /* End Marker */
4076 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004077};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004078
Adrian Bunk741b7762007-10-24 18:23:06 +02004079static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004080{
4081 const char *p;
4082 int len;
4083
4084 /*
4085 * check for trailing wildcard: *\0
4086 */
4087 p = strchr(patt, wildchar);
4088 if (p && ((*(p + 1)) == 0))
4089 len = p - patt;
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004090 else {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004091 len = strlen(name);
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004092 if (!len) {
4093 if (!*patt)
4094 return 0;
4095 return -1;
4096 }
4097 }
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004098
4099 return strncmp(patt, name, len);
4100}
4101
Tejun Heo75683fe2007-07-05 13:31:27 +09004102static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004103{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004104 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4105 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004106 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004107
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004108 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4109 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110
Alan Cox6919a0a2006-10-27 19:08:46 -07004111 while (ad->model_num) {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004112 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004113 if (ad->model_rev == NULL)
4114 return ad->horkage;
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004115 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
Alan Cox6919a0a2006-10-27 19:08:46 -07004116 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004117 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004118 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004119 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004120 return 0;
4121}
4122
Alan Cox6919a0a2006-10-27 19:08:46 -07004123static int ata_dma_blacklisted(const struct ata_device *dev)
4124{
4125 /* We don't support polling DMA.
4126 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4127 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4128 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004129 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004130 (dev->flags & ATA_DFLAG_CDB_INTR))
4131 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004132 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004133}
4134
Tejun Heoa6d5a512006-03-06 04:31:57 +09004135/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004136 * ata_is_40wire - check drive side detection
4137 * @dev: device
4138 *
4139 * Perform drive side detection decoding, allowing for device vendors
4140 * who can't follow the documentation.
4141 */
4142
4143static int ata_is_40wire(struct ata_device *dev)
4144{
4145 if (dev->horkage & ATA_HORKAGE_IVB)
4146 return ata_drive_40wire_relaxed(dev->id);
4147 return ata_drive_40wire(dev->id);
4148}
4149
4150/**
Alan Cox15a55512008-03-28 14:33:46 -07004151 * cable_is_40wire - 40/80/SATA decider
4152 * @ap: port to consider
4153 *
4154 * This function encapsulates the policy for speed management
4155 * in one place. At the moment we don't cache the result but
4156 * there is a good case for setting ap->cbl to the result when
4157 * we are called with unknown cables (and figuring out if it
4158 * impacts hotplug at all).
4159 *
4160 * Return 1 if the cable appears to be 40 wire.
4161 */
4162
4163static int cable_is_40wire(struct ata_port *ap)
4164{
4165 struct ata_link *link;
4166 struct ata_device *dev;
4167
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004168 /* If the controller thinks we are 40 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004169 if (ap->cbl == ATA_CBL_PATA40)
4170 return 1;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004171
4172 /* If the controller thinks we are 80 wire, we are. */
Alan Cox15a55512008-03-28 14:33:46 -07004173 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4174 return 0;
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004175
4176 /* If the system is known to be 40 wire short cable (eg
4177 * laptop), then we allow 80 wire modes even if the drive
4178 * isn't sure.
4179 */
Alan Coxf7920682008-04-08 16:37:50 +01004180 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4181 return 0;
Alan Cox15a55512008-03-28 14:33:46 -07004182
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004183 /* If the controller doesn't know, we scan.
4184 *
4185 * Note: We look for all 40 wire detects at this point. Any
4186 * 80 wire detect is taken to be 80 wire cable because
4187 * - in many setups only the one drive (slave if present) will
4188 * give a valid detect
4189 * - if you have a non detect capable drive you don't want it
4190 * to colour the choice
4191 */
Alan Cox15a55512008-03-28 14:33:46 -07004192 ata_port_for_each_link(link, ap) {
4193 ata_link_for_each_dev(dev, link) {
Tejun Heo4a9c7b32008-10-27 19:59:23 +09004194 if (ata_dev_enabled(dev) && !ata_is_40wire(dev))
Alan Cox15a55512008-03-28 14:33:46 -07004195 return 0;
4196 }
4197 }
4198 return 1;
4199}
4200
4201/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004202 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004203 * @dev: Device to compute xfermask for
4204 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004205 * Compute supported xfermask of @dev and store it in
4206 * dev->*_mask. This function is responsible for applying all
4207 * known limits including host controller limits, device
4208 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004209 *
4210 * LOCKING:
4211 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004212 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004213static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004214{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004215 struct ata_link *link = dev->link;
4216 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004217 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004218 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004219
Tejun Heo37deecb2006-08-10 16:59:07 +09004220 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004221 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4222 ap->mwdma_mask, ap->udma_mask);
4223
Robert Hancock8343f882007-03-06 02:37:51 -08004224 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004225 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4226 dev->mwdma_mask, dev->udma_mask);
4227 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004228
Alan Coxb352e572006-08-10 18:52:12 +01004229 /*
4230 * CFA Advanced TrueIDE timings are not allowed on a shared
4231 * cable
4232 */
4233 if (ata_dev_pair(dev)) {
4234 /* No PIO5 or PIO6 */
4235 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4236 /* No MWDMA3 or MWDMA 4 */
4237 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4238 }
4239
Tejun Heo37deecb2006-08-10 16:59:07 +09004240 if (ata_dma_blacklisted(dev)) {
4241 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09004242 ata_dev_printk(dev, KERN_WARNING,
4243 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004244 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004245
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004246 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004247 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004248 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4249 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4250 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004251 }
Tejun Heo565083e2006-04-02 17:54:47 +09004252
Jeff Garzike4246752007-03-09 09:56:46 -05004253 if (ap->flags & ATA_FLAG_NO_IORDY)
4254 xfer_mask &= ata_pio_mask_no_iordy(dev);
4255
Alan Cox5444a6f2006-03-27 18:58:20 +01004256 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004257 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004258
Robert Hancock8343f882007-03-06 02:37:51 -08004259 /* Apply cable rule here. Don't apply it early because when
4260 * we handle hot plug the cable type can itself change.
4261 * Check this last so that we know if the transfer rate was
4262 * solely limited by the cable.
4263 * Unknown or 80 wire cables reported host side are checked
4264 * drive side as well. Cases where we know a 40wire cable
4265 * is used safely for 80 are not checked here.
4266 */
4267 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4268 /* UDMA/44 or higher would be available */
Alan Cox15a55512008-03-28 14:33:46 -07004269 if (cable_is_40wire(ap)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004270 ata_dev_printk(dev, KERN_WARNING,
Robert Hancock8343f882007-03-06 02:37:51 -08004271 "limited to UDMA/33 due to 40-wire cable\n");
4272 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4273 }
4274
Tejun Heo565083e2006-04-02 17:54:47 +09004275 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4276 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004277}
4278
Linus Torvalds1da177e2005-04-16 15:20:36 -07004279/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004280 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004281 * @dev: Device to which command will be sent
4282 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004283 * Issue SET FEATURES - XFER MODE command to device @dev
4284 * on port @ap.
4285 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004286 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004287 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004288 *
4289 * RETURNS:
4290 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004291 */
4292
Tejun Heo3373efd2006-05-15 20:57:53 +09004293static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004294{
Tejun Heoa0123702005-12-13 14:49:31 +09004295 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004296 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004297
4298 /* set up set-features taskfile */
4299 DPRINTK("set features - xfer mode\n");
4300
Tejun Heo464cf172007-05-27 15:10:40 +02004301 /* Some controllers and ATAPI devices show flaky interrupt
4302 * behavior after setting xfer mode. Use polling instead.
4303 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004304 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004305 tf.command = ATA_CMD_SET_FEATURES;
4306 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004307 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004308 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004309 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004310 if (ata_pio_need_iordy(dev))
4311 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004312 /* If the device has IORDY and the controller does not - turn it off */
4313 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004314 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004315 else /* In the ancient relic department - skip all of this */
4316 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004317
Tejun Heo2b789102007-10-09 15:05:44 +09004318 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319
Tejun Heo83206a22006-03-24 15:25:31 +09004320 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4321 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004323/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004324 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004325 * @dev: Device to which command will be sent
4326 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004327 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004328 *
4329 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004330 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004331 *
4332 * LOCKING:
4333 * PCI/etc. bus probe sem.
4334 *
4335 * RETURNS:
4336 * 0 on success, AC_ERR_* mask otherwise.
4337 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04004338static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4339 u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004340{
4341 struct ata_taskfile tf;
4342 unsigned int err_mask;
4343
4344 /* set up set-features taskfile */
4345 DPRINTK("set features - SATA features\n");
4346
4347 ata_tf_init(dev, &tf);
4348 tf.command = ATA_CMD_SET_FEATURES;
4349 tf.feature = enable;
4350 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4351 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004352 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004353
Tejun Heo2b789102007-10-09 15:05:44 +09004354 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004355
4356 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4357 return err_mask;
4358}
4359
4360/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04004361 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04004362 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004363 * @heads: Number of heads (taskfile parameter)
4364 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004365 *
4366 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004367 * Kernel thread context (may sleep)
4368 *
4369 * RETURNS:
4370 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04004371 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004372static unsigned int ata_dev_init_params(struct ata_device *dev,
4373 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04004374{
Tejun Heoa0123702005-12-13 14:49:31 +09004375 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004376 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004377
4378 /* Number of sectors per track 1-255. Number of heads 1-16 */
4379 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004380 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004381
4382 /* set up init dev params taskfile */
4383 DPRINTK("init dev params \n");
4384
Tejun Heo3373efd2006-05-15 20:57:53 +09004385 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004386 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4387 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4388 tf.protocol = ATA_PROT_NODATA;
4389 tf.nsect = sectors;
4390 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04004391
Tejun Heo2b789102007-10-09 15:05:44 +09004392 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004393 /* A clean abort indicates an original or just out of spec drive
4394 and we should continue as we issue the setup based on the
4395 drive reported working geometry */
4396 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4397 err_mask = 0;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004398
Tejun Heo6aff8f12006-02-15 18:24:09 +09004399 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4400 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04004401}
4402
4403/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004404 * ata_sg_clean - Unmap DMA memory associated with command
4405 * @qc: Command containing DMA memory to be released
4406 *
4407 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408 *
4409 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004410 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004411 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004412void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004413{
4414 struct ata_port *ap = qc->ap;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004415 struct scatterlist *sg = qc->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416 int dir = qc->dma_dir;
4417
Tejun Heoa4631472006-02-11 19:11:13 +09004418 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004419
James Bottomleydde20202008-02-19 11:36:56 +01004420 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004421
James Bottomleydde20202008-02-19 11:36:56 +01004422 if (qc->n_elem)
4423 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004424
4425 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004426 qc->sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004427}
4428
4429/**
Tejun Heo5895ef92008-06-17 12:36:26 +09004430 * atapi_check_dma - Check whether ATAPI DMA can be supported
Linus Torvalds1da177e2005-04-16 15:20:36 -07004431 * @qc: Metadata associated with taskfile to check
4432 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004433 * Allow low-level driver to filter ATA PACKET commands, returning
4434 * a status indicating whether or not it is OK to use DMA for the
4435 * supplied PACKET command.
4436 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004437 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004438 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004439 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004440 * RETURNS: 0 when ATAPI DMA can be used
4441 * nonzero otherwise
4442 */
Tejun Heo5895ef92008-06-17 12:36:26 +09004443int atapi_check_dma(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004444{
4445 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004446
Tejun Heob9a41972007-06-27 02:48:43 +09004447 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4448 * few ATAPI devices choke on such DMA requests.
4449 */
Tejun Heo6a87e422008-11-03 19:01:09 +09004450 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4451 unlikely(qc->nbytes & 15))
Tejun Heob9a41972007-06-27 02:48:43 +09004452 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004453
Linus Torvalds1da177e2005-04-16 15:20:36 -07004454 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004455 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004456
Tejun Heob9a41972007-06-27 02:48:43 +09004457 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004458}
Tejun Heob9a41972007-06-27 02:48:43 +09004459
Linus Torvalds1da177e2005-04-16 15:20:36 -07004460/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004461 * ata_std_qc_defer - Check whether a qc needs to be deferred
4462 * @qc: ATA command in question
4463 *
4464 * Non-NCQ commands cannot run with any other command, NCQ or
4465 * not. As upper layer only knows the queue depth, we are
4466 * responsible for maintaining exclusion. This function checks
4467 * whether a new command @qc can be issued.
4468 *
4469 * LOCKING:
4470 * spin_lock_irqsave(host lock)
4471 *
4472 * RETURNS:
4473 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4474 */
4475int ata_std_qc_defer(struct ata_queued_cmd *qc)
4476{
4477 struct ata_link *link = qc->dev->link;
4478
4479 if (qc->tf.protocol == ATA_PROT_NCQ) {
4480 if (!ata_tag_valid(link->active_tag))
4481 return 0;
4482 } else {
4483 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4484 return 0;
4485 }
4486
4487 return ATA_DEFER_LINK;
4488}
4489
Brian Kinge46834c2006-03-17 17:04:03 -06004490void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4491
Jeff Garzik0cba6322005-05-30 19:49:12 -04004492/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004493 * ata_sg_init - Associate command with scatter-gather table.
4494 * @qc: Command to be associated
4495 * @sg: Scatter-gather table.
4496 * @n_elem: Number of elements in s/g table.
4497 *
4498 * Initialize the data-related elements of queued_cmd @qc
4499 * to point to a scatter-gather table @sg, containing @n_elem
4500 * elements.
4501 *
4502 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004503 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004504 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004505void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4506 unsigned int n_elem)
4507{
Tejun Heoff2aeb12007-12-05 16:43:11 +09004508 qc->sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004509 qc->n_elem = n_elem;
Tejun Heoff2aeb12007-12-05 16:43:11 +09004510 qc->cursg = qc->sg;
4511}
4512
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004514 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4515 * @qc: Command with scatter-gather table to be mapped.
4516 *
4517 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004518 *
4519 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004520 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004521 *
4522 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004523 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004524 *
4525 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004526static int ata_sg_setup(struct ata_queued_cmd *qc)
4527{
4528 struct ata_port *ap = qc->ap;
James Bottomleydde20202008-02-19 11:36:56 +01004529 unsigned int n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004530
Tejun Heo44877b42007-02-21 01:06:51 +09004531 VPRINTK("ENTER, ata%u\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532
James Bottomleydde20202008-02-19 11:36:56 +01004533 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4534 if (n_elem < 1)
4535 return -1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004536
James Bottomleydde20202008-02-19 11:36:56 +01004537 DPRINTK("%d sg elements mapped\n", n_elem);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004538
James Bottomleydde20202008-02-19 11:36:56 +01004539 qc->n_elem = n_elem;
Tejun Heof92a2632007-12-05 16:43:10 +09004540 qc->flags |= ATA_QCFLAG_DMAMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004541
4542 return 0;
4543}
4544
4545/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004546 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004547 * @buf: Buffer to swap
4548 * @buf_words: Number of 16-bit words in buffer.
4549 *
4550 * Swap halves of 16-bit words if needed to convert from
4551 * little-endian byte order to native cpu byte order, or
4552 * vice-versa.
4553 *
4554 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004555 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004556 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004557void swap_buf_le16(u16 *buf, unsigned int buf_words)
4558{
4559#ifdef __BIG_ENDIAN
4560 unsigned int i;
4561
4562 for (i = 0; i < buf_words; i++)
4563 buf[i] = le16_to_cpu(buf[i]);
4564#endif /* __BIG_ENDIAN */
4565}
4566
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004567/**
Tejun Heo8a8bc222008-11-10 14:48:21 +09004568 * ata_qc_new - Request an available ATA command, for queueing
4569 * @ap: Port associated with device @dev
4570 * @dev: Device from whom we request an available command structure
4571 *
4572 * LOCKING:
4573 * None.
4574 */
4575
4576static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4577{
4578 struct ata_queued_cmd *qc = NULL;
4579 unsigned int i;
4580
4581 /* no command while frozen */
4582 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4583 return NULL;
4584
4585 /* the last tag is reserved for internal command. */
4586 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4587 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4588 qc = __ata_qc_from_tag(ap, i);
4589 break;
4590 }
4591
4592 if (qc)
4593 qc->tag = i;
4594
4595 return qc;
4596}
4597
4598/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004599 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600 * @dev: Device from whom we request an available command structure
Randy Dunlap3cd8ddb2008-10-26 20:19:32 -07004601 * @tag: command tag
Linus Torvalds1da177e2005-04-16 15:20:36 -07004602 *
4603 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004604 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605 */
4606
Tejun Heo8a8bc222008-11-10 14:48:21 +09004607struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004608{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004609 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004610 struct ata_queued_cmd *qc;
4611
Tejun Heo8a8bc222008-11-10 14:48:21 +09004612 qc = ata_qc_new(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004613 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004614 qc->scsicmd = NULL;
4615 qc->ap = ap;
4616 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004617
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004618 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004619 }
4620
4621 return qc;
4622}
4623
Tejun Heo8a8bc222008-11-10 14:48:21 +09004624/**
4625 * ata_qc_free - free unused ata_queued_cmd
4626 * @qc: Command to complete
4627 *
4628 * Designed to free unused ata_queued_cmd object
4629 * in case something prevents using it.
4630 *
4631 * LOCKING:
4632 * spin_lock_irqsave(host lock)
4633 */
4634void ata_qc_free(struct ata_queued_cmd *qc)
4635{
4636 struct ata_port *ap = qc->ap;
4637 unsigned int tag;
4638
4639 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4640
4641 qc->flags = 0;
4642 tag = qc->tag;
4643 if (likely(ata_tag_valid(tag))) {
4644 qc->tag = ATA_TAG_POISON;
4645 clear_bit(tag, &ap->qc_allocated);
4646 }
4647}
4648
Tejun Heo76014422006-02-11 15:13:49 +09004649void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004650{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004651 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004652 struct ata_link *link = qc->dev->link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004653
Tejun Heoa4631472006-02-11 19:11:13 +09004654 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4655 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004656
4657 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4658 ata_sg_clean(qc);
4659
Tejun Heo7401abf2006-05-15 20:57:32 +09004660 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09004661 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004662 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09004663 if (!link->sactive)
4664 ap->nr_active_links--;
4665 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004666 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09004667 ap->nr_active_links--;
4668 }
4669
4670 /* clear exclusive status */
4671 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4672 ap->excl_link == link))
4673 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09004674
Albert Lee3f3791d2005-08-16 14:25:38 +08004675 /* atapi: mark qc as inactive to prevent the interrupt handler
4676 * from completing the command twice later, before the error handler
4677 * is called. (when rc != 0 and atapi request sense is needed)
4678 */
4679 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004680 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004681
Linus Torvalds1da177e2005-04-16 15:20:36 -07004682 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004683 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004684}
4685
Tejun Heo39599a52006-11-14 22:37:35 +09004686static void fill_result_tf(struct ata_queued_cmd *qc)
4687{
4688 struct ata_port *ap = qc->ap;
4689
Tejun Heo39599a52006-11-14 22:37:35 +09004690 qc->result_tf.flags = qc->tf.flags;
Tejun Heo22183bf2008-04-07 22:47:20 +09004691 ap->ops->qc_fill_rtf(qc);
Tejun Heo39599a52006-11-14 22:37:35 +09004692}
4693
Tejun Heo00115e02007-11-27 19:28:58 +09004694static void ata_verify_xfer(struct ata_queued_cmd *qc)
4695{
4696 struct ata_device *dev = qc->dev;
4697
4698 if (ata_tag_internal(qc->tag))
4699 return;
4700
4701 if (ata_is_nodata(qc->tf.protocol))
4702 return;
4703
4704 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4705 return;
4706
4707 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4708}
4709
Tejun Heof686bcb2006-05-15 20:58:05 +09004710/**
4711 * ata_qc_complete - Complete an active ATA command
4712 * @qc: Command to complete
Tejun Heof686bcb2006-05-15 20:58:05 +09004713 *
4714 * Indicate to the mid and upper layers that an ATA
4715 * command has completed, with either an ok or not-ok status.
4716 *
4717 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004718 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004719 */
4720void ata_qc_complete(struct ata_queued_cmd *qc)
4721{
4722 struct ata_port *ap = qc->ap;
4723
4724 /* XXX: New EH and old EH use different mechanisms to
4725 * synchronize EH with regular execution path.
4726 *
4727 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4728 * Normal execution path is responsible for not accessing a
4729 * failed qc. libata core enforces the rule by returning NULL
4730 * from ata_qc_from_tag() for failed qcs.
4731 *
4732 * Old EH depends on ata_qc_complete() nullifying completion
4733 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4734 * not synchronize with interrupt handler. Only PIO task is
4735 * taken care of.
4736 */
4737 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09004738 struct ata_device *dev = qc->dev;
4739 struct ata_eh_info *ehi = &dev->link->eh_info;
4740
Tejun Heob51e9e52006-06-29 01:29:30 +09004741 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004742
4743 if (unlikely(qc->err_mask))
4744 qc->flags |= ATA_QCFLAG_FAILED;
4745
4746 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4747 if (!ata_tag_internal(qc->tag)) {
4748 /* always fill result TF for failed qc */
Tejun Heo39599a52006-11-14 22:37:35 +09004749 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004750 ata_qc_schedule_eh(qc);
4751 return;
4752 }
4753 }
4754
4755 /* read result TF if requested */
4756 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004757 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004758
Tejun Heo4dbfa392007-10-25 18:22:44 +09004759 /* Some commands need post-processing after successful
4760 * completion.
4761 */
4762 switch (qc->tf.command) {
4763 case ATA_CMD_SET_FEATURES:
4764 if (qc->tf.feature != SETFEATURES_WC_ON &&
4765 qc->tf.feature != SETFEATURES_WC_OFF)
4766 break;
4767 /* fall through */
4768 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4769 case ATA_CMD_SET_MULTI: /* multi_count changed */
4770 /* revalidate device */
4771 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4772 ata_port_schedule_eh(ap);
4773 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004774
4775 case ATA_CMD_SLEEP:
4776 dev->flags |= ATA_DFLAG_SLEEPING;
4777 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09004778 }
4779
Tejun Heo00115e02007-11-27 19:28:58 +09004780 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4781 ata_verify_xfer(qc);
4782
Tejun Heof686bcb2006-05-15 20:58:05 +09004783 __ata_qc_complete(qc);
4784 } else {
4785 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4786 return;
4787
4788 /* read result TF if failed or requested */
4789 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004790 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004791
4792 __ata_qc_complete(qc);
4793 }
4794}
4795
Tejun Heodedaf2b2006-05-15 21:03:43 +09004796/**
4797 * ata_qc_complete_multiple - Complete multiple qcs successfully
4798 * @ap: port in question
4799 * @qc_active: new qc_active mask
Tejun Heodedaf2b2006-05-15 21:03:43 +09004800 *
4801 * Complete in-flight commands. This functions is meant to be
4802 * called from low-level driver's interrupt routine to complete
4803 * requests normally. ap->qc_active and @qc_active is compared
4804 * and commands are completed accordingly.
4805 *
4806 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004807 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004808 *
4809 * RETURNS:
4810 * Number of completed commands on success, -errno otherwise.
4811 */
Tejun Heo79f97da2008-04-07 22:47:20 +09004812int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004813{
4814 int nr_done = 0;
4815 u32 done_mask;
4816 int i;
4817
4818 done_mask = ap->qc_active ^ qc_active;
4819
4820 if (unlikely(done_mask & qc_active)) {
4821 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4822 "(%08x->%08x)\n", ap->qc_active, qc_active);
4823 return -EINVAL;
4824 }
4825
4826 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4827 struct ata_queued_cmd *qc;
4828
4829 if (!(done_mask & (1 << i)))
4830 continue;
4831
4832 if ((qc = ata_qc_from_tag(ap, i))) {
Tejun Heodedaf2b2006-05-15 21:03:43 +09004833 ata_qc_complete(qc);
4834 nr_done++;
4835 }
4836 }
4837
4838 return nr_done;
4839}
4840
Linus Torvalds1da177e2005-04-16 15:20:36 -07004841/**
4842 * ata_qc_issue - issue taskfile to device
4843 * @qc: command to issue to device
4844 *
4845 * Prepare an ATA command to submission to device.
4846 * This includes mapping the data into a DMA-able
4847 * area, filling in the S/G table, and finally
4848 * writing the taskfile to hardware, starting the command.
4849 *
4850 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004851 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004852 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004853void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004854{
4855 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004856 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09004857 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004858
Tejun Heodedaf2b2006-05-15 21:03:43 +09004859 /* Make sure only one non-NCQ command is outstanding. The
4860 * check is skipped for old EH because it reuses active qc to
4861 * request ATAPI sense.
4862 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004863 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09004864
Tejun Heo1973a022007-12-05 10:36:13 +09004865 if (ata_is_ncq(prot)) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004866 WARN_ON(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09004867
4868 if (!link->sactive)
4869 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004870 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004871 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004872 WARN_ON(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09004873
4874 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004875 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004876 }
4877
Tejun Heoe4a70e72006-03-31 20:36:47 +09004878 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004879 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004880
Tejun Heof92a2632007-12-05 16:43:10 +09004881 /* We guarantee to LLDs that they will have at least one
4882 * non-zero sg if the command is a data command.
4883 */
Tejun Heoff2aeb12007-12-05 16:43:11 +09004884 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
Tejun Heof92a2632007-12-05 16:43:10 +09004885
Tejun Heo405e66b2007-11-27 19:28:53 +09004886 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
Tejun Heof92a2632007-12-05 16:43:10 +09004887 (ap->flags & ATA_FLAG_PIO_DMA)))
Tejun Heo001102d2007-12-05 16:43:09 +09004888 if (ata_sg_setup(qc))
4889 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004890
Tejun Heocf480622008-01-24 00:05:14 +09004891 /* if device is sleeping, schedule reset and abort the link */
Tejun Heo054a5fb2007-10-25 18:30:36 +09004892 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
Tejun Heocf480622008-01-24 00:05:14 +09004893 link->eh_info.action |= ATA_EH_RESET;
Tejun Heo054a5fb2007-10-25 18:30:36 +09004894 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4895 ata_link_abort(link);
4896 return;
4897 }
4898
Linus Torvalds1da177e2005-04-16 15:20:36 -07004899 ap->ops->qc_prep(qc);
4900
Tejun Heo8e0e6942006-03-31 20:41:11 +09004901 qc->err_mask |= ap->ops->qc_issue(qc);
4902 if (unlikely(qc->err_mask))
4903 goto err;
4904 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004905
Tejun Heo8e436af2006-01-23 13:09:36 +09004906sg_err:
Tejun Heo8e0e6942006-03-31 20:41:11 +09004907 qc->err_mask |= AC_ERR_SYSTEM;
4908err:
4909 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004910}
4911
4912/**
Tejun Heo34bf2172006-05-15 20:57:46 +09004913 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09004914 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09004915 *
Tejun Heo936fd732007-08-06 18:36:23 +09004916 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09004917 *
4918 * LOCKING:
4919 * None.
4920 *
4921 * RETURNS:
4922 * 1 if SCRs are accessible, 0 otherwise.
4923 */
Tejun Heo936fd732007-08-06 18:36:23 +09004924int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09004925{
Tejun Heo936fd732007-08-06 18:36:23 +09004926 struct ata_port *ap = link->ap;
4927
Tejun Heoa16abc02007-05-21 18:33:47 +02004928 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09004929}
4930
4931/**
4932 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09004933 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09004934 * @reg: SCR to read
4935 * @val: Place to store read value
4936 *
Tejun Heo936fd732007-08-06 18:36:23 +09004937 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09004938 * guaranteed to succeed if @link is ap->link, the cable type of
4939 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09004940 *
4941 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09004942 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09004943 *
4944 * RETURNS:
4945 * 0 on success, negative errno on failure.
4946 */
Tejun Heo936fd732007-08-06 18:36:23 +09004947int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09004948{
Tejun Heo633273a2007-09-23 13:19:54 +09004949 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09004950 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09004951 return link->ap->ops->scr_read(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09004952 return -EOPNOTSUPP;
4953 }
4954
4955 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09004956}
4957
4958/**
4959 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09004960 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09004961 * @reg: SCR to write
4962 * @val: value to write
4963 *
Tejun Heo936fd732007-08-06 18:36:23 +09004964 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09004965 * guaranteed to succeed if @link is ap->link, the cable type of
4966 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09004967 *
4968 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09004969 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09004970 *
4971 * RETURNS:
4972 * 0 on success, negative errno on failure.
4973 */
Tejun Heo936fd732007-08-06 18:36:23 +09004974int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09004975{
Tejun Heo633273a2007-09-23 13:19:54 +09004976 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09004977 if (sata_scr_valid(link))
Tejun Heo82ef04f2008-07-31 17:02:40 +09004978 return link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09004979 return -EOPNOTSUPP;
4980 }
4981
4982 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09004983}
4984
4985/**
4986 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09004987 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09004988 * @reg: SCR to write
4989 * @val: value to write
4990 *
4991 * This function is identical to sata_scr_write() except that this
4992 * function performs flush after writing to the register.
4993 *
4994 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09004995 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09004996 *
4997 * RETURNS:
4998 * 0 on success, negative errno on failure.
4999 */
Tejun Heo936fd732007-08-06 18:36:23 +09005000int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005001{
Tejun Heo633273a2007-09-23 13:19:54 +09005002 if (ata_is_host_link(link)) {
Tejun Heo633273a2007-09-23 13:19:54 +09005003 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005004
Tejun Heo633273a2007-09-23 13:19:54 +09005005 if (sata_scr_valid(link)) {
Tejun Heo82ef04f2008-07-31 17:02:40 +09005006 rc = link->ap->ops->scr_write(link, reg, val);
Tejun Heo633273a2007-09-23 13:19:54 +09005007 if (rc == 0)
Tejun Heo82ef04f2008-07-31 17:02:40 +09005008 rc = link->ap->ops->scr_read(link, reg, &val);
Tejun Heo633273a2007-09-23 13:19:54 +09005009 return rc;
5010 }
5011 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09005012 }
Tejun Heo633273a2007-09-23 13:19:54 +09005013
5014 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005015}
5016
5017/**
Tejun Heob1c72912008-07-31 17:02:43 +09005018 * ata_phys_link_online - test whether the given link is online
Tejun Heo936fd732007-08-06 18:36:23 +09005019 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005020 *
Tejun Heo936fd732007-08-06 18:36:23 +09005021 * Test whether @link is online. Note that this function returns
5022 * 0 if online status of @link cannot be obtained, so
5023 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005024 *
5025 * LOCKING:
5026 * None.
5027 *
5028 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005029 * True if the port online status is available and online.
Tejun Heo34bf2172006-05-15 20:57:46 +09005030 */
Tejun Heob1c72912008-07-31 17:02:43 +09005031bool ata_phys_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005032{
5033 u32 sstatus;
5034
Tejun Heo936fd732007-08-06 18:36:23 +09005035 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5036 (sstatus & 0xf) == 0x3)
Tejun Heob5b3fa32008-07-31 17:02:42 +09005037 return true;
5038 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005039}
5040
5041/**
Tejun Heob1c72912008-07-31 17:02:43 +09005042 * ata_phys_link_offline - test whether the given link is offline
Tejun Heo936fd732007-08-06 18:36:23 +09005043 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005044 *
Tejun Heo936fd732007-08-06 18:36:23 +09005045 * Test whether @link is offline. Note that this function
5046 * returns 0 if offline status of @link cannot be obtained, so
5047 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005048 *
5049 * LOCKING:
5050 * None.
5051 *
5052 * RETURNS:
Tejun Heob5b3fa32008-07-31 17:02:42 +09005053 * True if the port offline status is available and offline.
Tejun Heo34bf2172006-05-15 20:57:46 +09005054 */
Tejun Heob1c72912008-07-31 17:02:43 +09005055bool ata_phys_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005056{
5057 u32 sstatus;
5058
Tejun Heo936fd732007-08-06 18:36:23 +09005059 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5060 (sstatus & 0xf) != 0x3)
Tejun Heob5b3fa32008-07-31 17:02:42 +09005061 return true;
5062 return false;
Tejun Heo34bf2172006-05-15 20:57:46 +09005063}
Edward Falk0baab862005-06-02 18:17:13 -04005064
Tejun Heob1c72912008-07-31 17:02:43 +09005065/**
5066 * ata_link_online - test whether the given link is online
5067 * @link: ATA link to test
5068 *
5069 * Test whether @link is online. This is identical to
5070 * ata_phys_link_online() when there's no slave link. When
5071 * there's a slave link, this function should only be called on
5072 * the master link and will return true if any of M/S links is
5073 * online.
5074 *
5075 * LOCKING:
5076 * None.
5077 *
5078 * RETURNS:
5079 * True if the port online status is available and online.
5080 */
5081bool ata_link_online(struct ata_link *link)
5082{
5083 struct ata_link *slave = link->ap->slave_link;
5084
5085 WARN_ON(link == slave); /* shouldn't be called on slave link */
5086
5087 return ata_phys_link_online(link) ||
5088 (slave && ata_phys_link_online(slave));
5089}
5090
5091/**
5092 * ata_link_offline - test whether the given link is offline
5093 * @link: ATA link to test
5094 *
5095 * Test whether @link is offline. This is identical to
5096 * ata_phys_link_offline() when there's no slave link. When
5097 * there's a slave link, this function should only be called on
5098 * the master link and will return true if both M/S links are
5099 * offline.
5100 *
5101 * LOCKING:
5102 * None.
5103 *
5104 * RETURNS:
5105 * True if the port offline status is available and offline.
5106 */
5107bool ata_link_offline(struct ata_link *link)
5108{
5109 struct ata_link *slave = link->ap->slave_link;
5110
5111 WARN_ON(link == slave); /* shouldn't be called on slave link */
5112
5113 return ata_phys_link_offline(link) &&
5114 (!slave || ata_phys_link_offline(slave));
5115}
5116
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005117#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04005118static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5119 unsigned int action, unsigned int ehi_flags,
5120 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005121{
5122 unsigned long flags;
5123 int i, rc;
5124
Jeff Garzikcca39742006-08-24 03:19:22 -04005125 for (i = 0; i < host->n_ports; i++) {
5126 struct ata_port *ap = host->ports[i];
Tejun Heoe3667eb2007-08-06 18:36:24 +09005127 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09005128
5129 /* Previous resume operation might still be in
5130 * progress. Wait for PM_PENDING to clear.
5131 */
5132 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5133 ata_port_wait_eh(ap);
5134 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5135 }
5136
5137 /* request PM ops to EH */
5138 spin_lock_irqsave(ap->lock, flags);
5139
5140 ap->pm_mesg = mesg;
5141 if (wait) {
5142 rc = 0;
5143 ap->pm_result = &rc;
5144 }
5145
5146 ap->pflags |= ATA_PFLAG_PM_PENDING;
Tejun Heoe3667eb2007-08-06 18:36:24 +09005147 __ata_port_for_each_link(link, ap) {
5148 link->eh_info.action |= action;
5149 link->eh_info.flags |= ehi_flags;
5150 }
Tejun Heo500530f2006-07-03 16:07:27 +09005151
5152 ata_port_schedule_eh(ap);
5153
5154 spin_unlock_irqrestore(ap->lock, flags);
5155
5156 /* wait and check result */
5157 if (wait) {
5158 ata_port_wait_eh(ap);
5159 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5160 if (rc)
5161 return rc;
5162 }
5163 }
5164
5165 return 0;
5166}
5167
5168/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005169 * ata_host_suspend - suspend host
5170 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005171 * @mesg: PM message
5172 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005173 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005174 * function requests EH to perform PM operations and waits for EH
5175 * to finish.
5176 *
5177 * LOCKING:
5178 * Kernel thread context (may sleep).
5179 *
5180 * RETURNS:
5181 * 0 on success, -errno on failure.
5182 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005183int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005184{
Tejun Heo9666f402007-05-04 21:27:47 +02005185 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09005186
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005187 /*
5188 * disable link pm on all ports before requesting
5189 * any pm activity
5190 */
5191 ata_lpm_enable(host);
5192
Jeff Garzikcca39742006-08-24 03:19:22 -04005193 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005194 if (rc == 0)
5195 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005196 return rc;
5197}
5198
5199/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005200 * ata_host_resume - resume host
5201 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005202 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005203 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005204 * function requests EH to perform PM operations and returns.
5205 * Note that all resume operations are performed parallely.
5206 *
5207 * LOCKING:
5208 * Kernel thread context (may sleep).
5209 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005210void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005211{
Tejun Heocf480622008-01-24 00:05:14 +09005212 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
Jeff Garzikcca39742006-08-24 03:19:22 -04005213 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
Jeff Garzik72ad6ec2008-02-25 17:31:10 -05005214 host->dev->power.power_state = PMSG_ON;
Kristen Carlson Accardica773292007-10-25 00:58:59 -04005215
5216 /* reenable link pm */
5217 ata_lpm_disable(host);
Tejun Heo500530f2006-07-03 16:07:27 +09005218}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005219#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005220
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005221/**
5222 * ata_port_start - Set port up for dma.
5223 * @ap: Port to initialize
5224 *
5225 * Called just after data structures for each port are
5226 * initialized. Allocates space for PRD table.
5227 *
5228 * May be used as the port_start() entry in ata_port_operations.
5229 *
5230 * LOCKING:
5231 * Inherited from caller.
5232 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09005233int ata_port_start(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005234{
Brian King2f1f6102006-03-23 17:30:15 -06005235 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005236
Tejun Heof0d36ef2007-01-20 16:00:28 +09005237 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5238 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005239 if (!ap->prd)
5240 return -ENOMEM;
5241
Linus Torvalds1da177e2005-04-16 15:20:36 -07005242 return 0;
5243}
5244
Edward Falk0baab862005-06-02 18:17:13 -04005245/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005246 * ata_dev_init - Initialize an ata_device structure
5247 * @dev: Device structure to initialize
5248 *
5249 * Initialize @dev in preparation for probing.
5250 *
5251 * LOCKING:
5252 * Inherited from caller.
5253 */
5254void ata_dev_init(struct ata_device *dev)
5255{
Tejun Heob1c72912008-07-31 17:02:43 +09005256 struct ata_link *link = ata_dev_phys_link(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005257 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005258 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005259
Tejun Heob1c72912008-07-31 17:02:43 +09005260 /* SATA spd limit is bound to the attached device, reset together */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005261 link->sata_spd_limit = link->hw_sata_spd_limit;
5262 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005263
Tejun Heo72fa4b72006-05-31 18:27:32 +09005264 /* High bits of dev->flags are used to record warm plug
5265 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005266 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005267 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005268 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005269 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09005270 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005271 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005272
5273 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5274 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005275 dev->pio_mask = UINT_MAX;
5276 dev->mwdma_mask = UINT_MAX;
5277 dev->udma_mask = UINT_MAX;
5278}
5279
5280/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09005281 * ata_link_init - Initialize an ata_link structure
5282 * @ap: ATA port link is attached to
5283 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09005284 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09005285 *
5286 * Initialize @link.
5287 *
5288 * LOCKING:
5289 * Kernel thread context (may sleep)
5290 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005291void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005292{
5293 int i;
5294
5295 /* clear everything except for devices */
5296 memset(link, 0, offsetof(struct ata_link, device[0]));
5297
5298 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09005299 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005300 link->active_tag = ATA_TAG_POISON;
5301 link->hw_sata_spd_limit = UINT_MAX;
5302
5303 /* can't use iterator, ap isn't initialized yet */
5304 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5305 struct ata_device *dev = &link->device[i];
5306
5307 dev->link = link;
5308 dev->devno = dev - link->device;
5309 ata_dev_init(dev);
5310 }
5311}
5312
5313/**
5314 * sata_link_init_spd - Initialize link->sata_spd_limit
5315 * @link: Link to configure sata_spd_limit for
5316 *
5317 * Initialize @link->[hw_]sata_spd_limit to the currently
5318 * configured value.
5319 *
5320 * LOCKING:
5321 * Kernel thread context (may sleep).
5322 *
5323 * RETURNS:
5324 * 0 on success, -errno on failure.
5325 */
Tejun Heofb7fd612007-09-23 13:14:12 +09005326int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09005327{
Tejun Heo33267322008-02-13 09:15:09 +09005328 u8 spd;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005329 int rc;
5330
Tejun Heod127ea72008-07-31 16:09:34 +09005331 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
Tejun Heo4fb37a22007-08-06 18:36:23 +09005332 if (rc)
5333 return rc;
5334
Tejun Heod127ea72008-07-31 16:09:34 +09005335 spd = (link->saved_scontrol >> 4) & 0xf;
Tejun Heo4fb37a22007-08-06 18:36:23 +09005336 if (spd)
5337 link->hw_sata_spd_limit &= (1 << spd) - 1;
5338
Tejun Heo05944bd2008-08-13 20:19:09 +09005339 ata_force_link_limits(link);
Tejun Heo33267322008-02-13 09:15:09 +09005340
Tejun Heo4fb37a22007-08-06 18:36:23 +09005341 link->sata_spd_limit = link->hw_sata_spd_limit;
5342
5343 return 0;
5344}
5345
5346/**
Tejun Heof3187192007-04-17 23:44:07 +09005347 * ata_port_alloc - allocate and initialize basic ATA port resources
5348 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005349 *
Tejun Heof3187192007-04-17 23:44:07 +09005350 * Allocate and initialize basic ATA port resources.
5351 *
5352 * RETURNS:
5353 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005354 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005355 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005356 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005357 */
Tejun Heof3187192007-04-17 23:44:07 +09005358struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005359{
Tejun Heof3187192007-04-17 23:44:07 +09005360 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005361
Tejun Heof3187192007-04-17 23:44:07 +09005362 DPRINTK("ENTER\n");
5363
5364 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5365 if (!ap)
5366 return NULL;
5367
Tejun Heof4d6d002007-05-01 11:50:15 +02005368 ap->pflags |= ATA_PFLAG_INITIALIZING;
Jeff Garzikcca39742006-08-24 03:19:22 -04005369 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005370 ap->flags = ATA_FLAG_DISABLED;
Tejun Heof3187192007-04-17 23:44:07 +09005371 ap->print_id = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005372 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04005373 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005374 ap->dev = host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005375 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005376
5377#if defined(ATA_VERBOSE_DEBUG)
5378 /* turn on all debugging levels */
5379 ap->msg_enable = 0x00FF;
5380#elif defined(ATA_DEBUG)
5381 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 +09005382#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005383 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005384#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005385
Tejun Heo127102a2008-04-07 22:47:21 +09005386#ifdef CONFIG_ATA_SFF
Jeff Garzik442eacc2007-12-19 04:25:10 -05005387 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
Tejun Heof667fdb2008-10-20 13:11:56 +09005388#else
5389 INIT_DELAYED_WORK(&ap->port_task, NULL);
Tejun Heo127102a2008-04-07 22:47:21 +09005390#endif
David Howells65f27f32006-11-22 14:55:48 +00005391 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5392 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005393 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005394 init_waitqueue_head(&ap->eh_wait_q);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02005395 init_completion(&ap->park_req_pending);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09005396 init_timer_deferrable(&ap->fastdrain_timer);
5397 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5398 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005399
Tejun Heo838df622006-05-15 20:57:44 +09005400 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005401
Tejun Heo89898052007-08-06 18:36:23 +09005402 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005403
5404#ifdef ATA_IRQ_TRAP
5405 ap->stats.unhandled_irq = 1;
5406 ap->stats.idle_irq = 1;
5407#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005408 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005409}
5410
Tejun Heof0d36ef2007-01-20 16:00:28 +09005411static void ata_host_release(struct device *gendev, void *res)
5412{
5413 struct ata_host *host = dev_get_drvdata(gendev);
5414 int i;
5415
5416 for (i = 0; i < host->n_ports; i++) {
5417 struct ata_port *ap = host->ports[i];
5418
Tejun Heoecef7252007-04-17 23:44:06 +09005419 if (!ap)
5420 continue;
5421
Tejun Heo49114872007-04-17 23:44:06 +09005422 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005423 scsi_host_put(ap->scsi_host);
5424
Tejun Heo633273a2007-09-23 13:19:54 +09005425 kfree(ap->pmp_link);
Tejun Heob1c72912008-07-31 17:02:43 +09005426 kfree(ap->slave_link);
Tejun Heo49114872007-04-17 23:44:06 +09005427 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005428 host->ports[i] = NULL;
5429 }
5430
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005431 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005432}
5433
Linus Torvalds1da177e2005-04-16 15:20:36 -07005434/**
Tejun Heof3187192007-04-17 23:44:07 +09005435 * ata_host_alloc - allocate and init basic ATA host resources
5436 * @dev: generic device this host is associated with
5437 * @max_ports: maximum number of ATA ports associated with this host
5438 *
5439 * Allocate and initialize basic ATA host resources. LLD calls
5440 * this function to allocate a host, initializes it fully and
5441 * attaches it using ata_host_register().
5442 *
5443 * @max_ports ports are allocated and host->n_ports is
5444 * initialized to @max_ports. The caller is allowed to decrease
5445 * host->n_ports before calling ata_host_register(). The unused
5446 * ports will be automatically freed on registration.
5447 *
5448 * RETURNS:
5449 * Allocate ATA host on success, NULL on failure.
5450 *
5451 * LOCKING:
5452 * Inherited from calling layer (may sleep).
5453 */
5454struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5455{
5456 struct ata_host *host;
5457 size_t sz;
5458 int i;
5459
5460 DPRINTK("ENTER\n");
5461
5462 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5463 return NULL;
5464
5465 /* alloc a container for our list of ATA ports (buses) */
5466 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5467 /* alloc a container for our list of ATA ports (buses) */
5468 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5469 if (!host)
5470 goto err_out;
5471
5472 devres_add(dev, host);
5473 dev_set_drvdata(dev, host);
5474
5475 spin_lock_init(&host->lock);
5476 host->dev = dev;
5477 host->n_ports = max_ports;
5478
5479 /* allocate ports bound to this host */
5480 for (i = 0; i < max_ports; i++) {
5481 struct ata_port *ap;
5482
5483 ap = ata_port_alloc(host);
5484 if (!ap)
5485 goto err_out;
5486
5487 ap->port_no = i;
5488 host->ports[i] = ap;
5489 }
5490
5491 devres_remove_group(dev, NULL);
5492 return host;
5493
5494 err_out:
5495 devres_release_group(dev, NULL);
5496 return NULL;
5497}
5498
5499/**
Tejun Heof5cda252007-04-17 23:44:07 +09005500 * ata_host_alloc_pinfo - alloc host and init with port_info array
5501 * @dev: generic device this host is associated with
5502 * @ppi: array of ATA port_info to initialize host with
5503 * @n_ports: number of ATA ports attached to this host
5504 *
5505 * Allocate ATA host and initialize with info from @ppi. If NULL
5506 * terminated, @ppi may contain fewer entries than @n_ports. The
5507 * last entry will be used for the remaining ports.
5508 *
5509 * RETURNS:
5510 * Allocate ATA host on success, NULL on failure.
5511 *
5512 * LOCKING:
5513 * Inherited from calling layer (may sleep).
5514 */
5515struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5516 const struct ata_port_info * const * ppi,
5517 int n_ports)
5518{
5519 const struct ata_port_info *pi;
5520 struct ata_host *host;
5521 int i, j;
5522
5523 host = ata_host_alloc(dev, n_ports);
5524 if (!host)
5525 return NULL;
5526
5527 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5528 struct ata_port *ap = host->ports[i];
5529
5530 if (ppi[j])
5531 pi = ppi[j++];
5532
5533 ap->pio_mask = pi->pio_mask;
5534 ap->mwdma_mask = pi->mwdma_mask;
5535 ap->udma_mask = pi->udma_mask;
5536 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09005537 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09005538 ap->ops = pi->port_ops;
5539
5540 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5541 host->ops = pi->port_ops;
Tejun Heof5cda252007-04-17 23:44:07 +09005542 }
5543
5544 return host;
5545}
5546
Tejun Heob1c72912008-07-31 17:02:43 +09005547/**
5548 * ata_slave_link_init - initialize slave link
5549 * @ap: port to initialize slave link for
5550 *
5551 * Create and initialize slave link for @ap. This enables slave
5552 * link handling on the port.
5553 *
5554 * In libata, a port contains links and a link contains devices.
5555 * There is single host link but if a PMP is attached to it,
5556 * there can be multiple fan-out links. On SATA, there's usually
5557 * a single device connected to a link but PATA and SATA
5558 * controllers emulating TF based interface can have two - master
5559 * and slave.
5560 *
5561 * However, there are a few controllers which don't fit into this
5562 * abstraction too well - SATA controllers which emulate TF
5563 * interface with both master and slave devices but also have
5564 * separate SCR register sets for each device. These controllers
5565 * need separate links for physical link handling
5566 * (e.g. onlineness, link speed) but should be treated like a
5567 * traditional M/S controller for everything else (e.g. command
5568 * issue, softreset).
5569 *
5570 * slave_link is libata's way of handling this class of
5571 * controllers without impacting core layer too much. For
5572 * anything other than physical link handling, the default host
5573 * link is used for both master and slave. For physical link
5574 * handling, separate @ap->slave_link is used. All dirty details
5575 * are implemented inside libata core layer. From LLD's POV, the
5576 * only difference is that prereset, hardreset and postreset are
5577 * called once more for the slave link, so the reset sequence
5578 * looks like the following.
5579 *
5580 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5581 * softreset(M) -> postreset(M) -> postreset(S)
5582 *
5583 * Note that softreset is called only for the master. Softreset
5584 * resets both M/S by definition, so SRST on master should handle
5585 * both (the standard method will work just fine).
5586 *
5587 * LOCKING:
5588 * Should be called before host is registered.
5589 *
5590 * RETURNS:
5591 * 0 on success, -errno on failure.
5592 */
5593int ata_slave_link_init(struct ata_port *ap)
5594{
5595 struct ata_link *link;
5596
5597 WARN_ON(ap->slave_link);
5598 WARN_ON(ap->flags & ATA_FLAG_PMP);
5599
5600 link = kzalloc(sizeof(*link), GFP_KERNEL);
5601 if (!link)
5602 return -ENOMEM;
5603
5604 ata_link_init(ap, link, 1);
5605 ap->slave_link = link;
5606 return 0;
5607}
5608
Tejun Heo32ebbc02007-11-08 13:09:00 +09005609static void ata_host_stop(struct device *gendev, void *res)
5610{
5611 struct ata_host *host = dev_get_drvdata(gendev);
5612 int i;
5613
5614 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5615
5616 for (i = 0; i < host->n_ports; i++) {
5617 struct ata_port *ap = host->ports[i];
5618
5619 if (ap->ops->port_stop)
5620 ap->ops->port_stop(ap);
5621 }
5622
5623 if (host->ops->host_stop)
5624 host->ops->host_stop(host);
5625}
5626
Tejun Heof5cda252007-04-17 23:44:07 +09005627/**
Tejun Heo029cfd62008-03-25 12:22:49 +09005628 * ata_finalize_port_ops - finalize ata_port_operations
5629 * @ops: ata_port_operations to finalize
5630 *
5631 * An ata_port_operations can inherit from another ops and that
5632 * ops can again inherit from another. This can go on as many
5633 * times as necessary as long as there is no loop in the
5634 * inheritance chain.
5635 *
5636 * Ops tables are finalized when the host is started. NULL or
5637 * unspecified entries are inherited from the closet ancestor
5638 * which has the method and the entry is populated with it.
5639 * After finalization, the ops table directly points to all the
5640 * methods and ->inherits is no longer necessary and cleared.
5641 *
5642 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5643 *
5644 * LOCKING:
5645 * None.
5646 */
5647static void ata_finalize_port_ops(struct ata_port_operations *ops)
5648{
Pradeep Singh Rautela2da67652008-05-29 23:28:14 +05305649 static DEFINE_SPINLOCK(lock);
Tejun Heo029cfd62008-03-25 12:22:49 +09005650 const struct ata_port_operations *cur;
5651 void **begin = (void **)ops;
5652 void **end = (void **)&ops->inherits;
5653 void **pp;
5654
5655 if (!ops || !ops->inherits)
5656 return;
5657
5658 spin_lock(&lock);
5659
5660 for (cur = ops->inherits; cur; cur = cur->inherits) {
5661 void **inherit = (void **)cur;
5662
5663 for (pp = begin; pp < end; pp++, inherit++)
5664 if (!*pp)
5665 *pp = *inherit;
5666 }
5667
5668 for (pp = begin; pp < end; pp++)
5669 if (IS_ERR(*pp))
5670 *pp = NULL;
5671
5672 ops->inherits = NULL;
5673
5674 spin_unlock(&lock);
5675}
5676
5677/**
Tejun Heoecef7252007-04-17 23:44:06 +09005678 * ata_host_start - start and freeze ports of an ATA host
5679 * @host: ATA host to start ports for
5680 *
5681 * Start and then freeze ports of @host. Started status is
5682 * recorded in host->flags, so this function can be called
5683 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005684 * once. If host->ops isn't initialized yet, its set to the
5685 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005686 *
5687 * LOCKING:
5688 * Inherited from calling layer (may sleep).
5689 *
5690 * RETURNS:
5691 * 0 if all ports are started successfully, -errno otherwise.
5692 */
5693int ata_host_start(struct ata_host *host)
5694{
Tejun Heo32ebbc02007-11-08 13:09:00 +09005695 int have_stop = 0;
5696 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09005697 int i, rc;
5698
5699 if (host->flags & ATA_HOST_STARTED)
5700 return 0;
5701
Tejun Heo029cfd62008-03-25 12:22:49 +09005702 ata_finalize_port_ops(host->ops);
5703
Tejun Heoecef7252007-04-17 23:44:06 +09005704 for (i = 0; i < host->n_ports; i++) {
5705 struct ata_port *ap = host->ports[i];
5706
Tejun Heo029cfd62008-03-25 12:22:49 +09005707 ata_finalize_port_ops(ap->ops);
5708
Tejun Heof3187192007-04-17 23:44:07 +09005709 if (!host->ops && !ata_port_is_dummy(ap))
5710 host->ops = ap->ops;
5711
Tejun Heo32ebbc02007-11-08 13:09:00 +09005712 if (ap->ops->port_stop)
5713 have_stop = 1;
5714 }
5715
5716 if (host->ops->host_stop)
5717 have_stop = 1;
5718
5719 if (have_stop) {
5720 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5721 if (!start_dr)
5722 return -ENOMEM;
5723 }
5724
5725 for (i = 0; i < host->n_ports; i++) {
5726 struct ata_port *ap = host->ports[i];
5727
Tejun Heoecef7252007-04-17 23:44:06 +09005728 if (ap->ops->port_start) {
5729 rc = ap->ops->port_start(ap);
5730 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00005731 if (rc != -ENODEV)
Andrew Morton0f757742008-01-10 14:33:09 -08005732 dev_printk(KERN_ERR, host->dev,
5733 "failed to start port %d "
5734 "(errno=%d)\n", i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09005735 goto err_out;
5736 }
5737 }
Tejun Heoecef7252007-04-17 23:44:06 +09005738 ata_eh_freeze_port(ap);
5739 }
5740
Tejun Heo32ebbc02007-11-08 13:09:00 +09005741 if (start_dr)
5742 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005743 host->flags |= ATA_HOST_STARTED;
5744 return 0;
5745
5746 err_out:
5747 while (--i >= 0) {
5748 struct ata_port *ap = host->ports[i];
5749
5750 if (ap->ops->port_stop)
5751 ap->ops->port_stop(ap);
5752 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09005753 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09005754 return rc;
5755}
5756
5757/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005758 * ata_sas_host_init - Initialize a host struct
5759 * @host: host to initialize
5760 * @dev: device host is attached to
5761 * @flags: host flags
5762 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005763 *
5764 * LOCKING:
5765 * PCI/etc. bus probe sem.
5766 *
5767 */
Tejun Heof3187192007-04-17 23:44:07 +09005768/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04005769void ata_host_init(struct ata_host *host, struct device *dev,
Tejun Heo029cfd62008-03-25 12:22:49 +09005770 unsigned long flags, struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005771{
Jeff Garzikcca39742006-08-24 03:19:22 -04005772 spin_lock_init(&host->lock);
5773 host->dev = dev;
5774 host->flags = flags;
5775 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005776}
5777
5778/**
Tejun Heof3187192007-04-17 23:44:07 +09005779 * ata_host_register - register initialized ATA host
5780 * @host: ATA host to register
5781 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04005782 *
Tejun Heof3187192007-04-17 23:44:07 +09005783 * Register initialized ATA host. @host is allocated using
5784 * ata_host_alloc() and fully initialized by LLD. This function
5785 * starts ports, registers @host with ATA and SCSI layers and
5786 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005787 *
5788 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005789 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005790 *
5791 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09005792 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005793 */
Tejun Heof3187192007-04-17 23:44:07 +09005794int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005795{
Tejun Heof3187192007-04-17 23:44:07 +09005796 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005797
Tejun Heof3187192007-04-17 23:44:07 +09005798 /* host must have been started */
5799 if (!(host->flags & ATA_HOST_STARTED)) {
5800 dev_printk(KERN_ERR, host->dev,
5801 "BUG: trying to register unstarted host\n");
5802 WARN_ON(1);
5803 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01005804 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09005805
Tejun Heof3187192007-04-17 23:44:07 +09005806 /* Blow away unused ports. This happens when LLD can't
5807 * determine the exact number of ports to allocate at
5808 * allocation time.
5809 */
5810 for (i = host->n_ports; host->ports[i]; i++)
5811 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005812
Tejun Heof3187192007-04-17 23:44:07 +09005813 /* give ports names and add SCSI hosts */
5814 for (i = 0; i < host->n_ports; i++)
5815 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09005816
Tejun Heof3187192007-04-17 23:44:07 +09005817 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09005818 if (rc)
Tejun Heof3187192007-04-17 23:44:07 +09005819 return rc;
Tejun Heoecef7252007-04-17 23:44:06 +09005820
Tejun Heofafbae82007-05-15 03:28:16 +09005821 /* associate with ACPI nodes */
5822 ata_acpi_associate(host);
5823
Tejun Heof3187192007-04-17 23:44:07 +09005824 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04005825 for (i = 0; i < host->n_ports; i++) {
5826 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09005827 unsigned long xfer_mask;
5828
5829 /* set SATA cable type if still unset */
5830 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5831 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005832
Tejun Heo5a04bf42006-05-31 18:27:38 +09005833 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09005834 sata_link_init_spd(&ap->link);
Tejun Heob1c72912008-07-31 17:02:43 +09005835 if (ap->slave_link)
5836 sata_link_init_spd(ap->slave_link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09005837
Tejun Heocbcdd872007-08-18 13:14:55 +09005838 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09005839 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5840 ap->udma_mask);
5841
Tejun Heoabf6e8e2007-10-09 14:57:25 +09005842 if (!ata_port_is_dummy(ap)) {
Tejun Heocbcdd872007-08-18 13:14:55 +09005843 ata_port_printk(ap, KERN_INFO,
5844 "%cATA max %s %s\n",
Tejun Heoa16abc02007-05-21 18:33:47 +02005845 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
Tejun Heof3187192007-04-17 23:44:07 +09005846 ata_mode_string(xfer_mask),
Tejun Heocbcdd872007-08-18 13:14:55 +09005847 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09005848 ata_ehi_clear_desc(&ap->link.eh_info);
5849 } else
Tejun Heof3187192007-04-17 23:44:07 +09005850 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
5851 }
5852
5853 /* perform each probe synchronously */
5854 DPRINTK("probe begin\n");
5855 for (i = 0; i < host->n_ports; i++) {
5856 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09005857
5858 /* probe */
Tejun Heo52783c52006-05-31 18:28:22 +09005859 if (ap->ops->error_handler) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005860 struct ata_eh_info *ehi = &ap->link.eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09005861 unsigned long flags;
5862
5863 ata_port_probe(ap);
5864
5865 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005866 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005867
Tejun Heob558edd2008-01-24 00:05:14 +09005868 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heo391191c2008-05-19 01:15:12 +09005869 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
Tejun Heo1cdaf532006-07-03 16:07:26 +09005870 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09005871
Tejun Heof4d6d002007-05-01 11:50:15 +02005872 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
Tejun Heob51e9e52006-06-29 01:29:30 +09005873 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09005874 ata_port_schedule_eh(ap);
5875
Jeff Garzikba6a1302006-06-22 23:46:10 -04005876 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005877
5878 /* wait for EH to finish */
5879 ata_port_wait_eh(ap);
5880 } else {
Tejun Heo44877b42007-02-21 01:06:51 +09005881 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09005882 rc = ata_bus_probe(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09005883 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09005884
5885 if (rc) {
5886 /* FIXME: do something useful here?
5887 * Current libata behavior will
5888 * tear down everything when
5889 * the module is removed
5890 * or the h/w is unplugged.
5891 */
5892 }
5893 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005894 }
5895
5896 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005897 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04005898 for (i = 0; i < host->n_ports; i++) {
5899 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07005900
Tejun Heo1ae46312007-07-16 14:29:40 +09005901 ata_scsi_scan_host(ap, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005902 }
5903
Tejun Heof3187192007-04-17 23:44:07 +09005904 return 0;
5905}
5906
5907/**
Tejun Heof5cda252007-04-17 23:44:07 +09005908 * ata_host_activate - start host, request IRQ and register it
5909 * @host: target ATA host
5910 * @irq: IRQ to request
5911 * @irq_handler: irq_handler used when requesting IRQ
5912 * @irq_flags: irq_flags used when requesting IRQ
5913 * @sht: scsi_host_template to use when registering the host
5914 *
5915 * After allocating an ATA host and initializing it, most libata
5916 * LLDs perform three steps to activate the host - start host,
5917 * request IRQ and register it. This helper takes necessasry
5918 * arguments and performs the three steps in one go.
5919 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09005920 * An invalid IRQ skips the IRQ registration and expects the host to
5921 * have set polling mode on the port. In this case, @irq_handler
5922 * should be NULL.
5923 *
Tejun Heof5cda252007-04-17 23:44:07 +09005924 * LOCKING:
5925 * Inherited from calling layer (may sleep).
5926 *
5927 * RETURNS:
5928 * 0 on success, -errno otherwise.
5929 */
5930int ata_host_activate(struct ata_host *host, int irq,
5931 irq_handler_t irq_handler, unsigned long irq_flags,
5932 struct scsi_host_template *sht)
5933{
Tejun Heocbcdd872007-08-18 13:14:55 +09005934 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09005935
5936 rc = ata_host_start(host);
5937 if (rc)
5938 return rc;
5939
Paul Mundt3d46b2e2007-11-08 11:14:56 +09005940 /* Special case for polling mode */
5941 if (!irq) {
5942 WARN_ON(irq_handler);
5943 return ata_host_register(host, sht);
5944 }
5945
Tejun Heof5cda252007-04-17 23:44:07 +09005946 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
5947 dev_driver_string(host->dev), host);
5948 if (rc)
5949 return rc;
5950
Tejun Heocbcdd872007-08-18 13:14:55 +09005951 for (i = 0; i < host->n_ports; i++)
5952 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09005953
Tejun Heof5cda252007-04-17 23:44:07 +09005954 rc = ata_host_register(host, sht);
5955 /* if failed, just free the IRQ and leave ports alone */
5956 if (rc)
5957 devm_free_irq(host->dev, irq, host);
5958
5959 return rc;
5960}
5961
5962/**
Tejun Heo720ba122006-05-31 18:28:13 +09005963 * ata_port_detach - Detach ATA port in prepration of device removal
5964 * @ap: ATA port to be detached
5965 *
5966 * Detach all ATA devices and the associated SCSI devices of @ap;
5967 * then, remove the associated SCSI host. @ap is guaranteed to
5968 * be quiescent on return from this function.
5969 *
5970 * LOCKING:
5971 * Kernel thread context (may sleep).
5972 */
Adrian Bunk741b7762007-10-24 18:23:06 +02005973static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09005974{
5975 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09005976 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09005977 struct ata_device *dev;
Tejun Heo720ba122006-05-31 18:28:13 +09005978
5979 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005980 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09005981
5982 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005983 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09005984 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005985 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005986
5987 ata_port_wait_eh(ap);
5988
Tejun Heo7f9ad9b2007-12-15 15:05:00 +09005989 /* EH is now guaranteed to see UNLOADING - EH context belongs
Tejun Heod127ea72008-07-31 16:09:34 +09005990 * to us. Restore SControl and disable all existing devices.
Tejun Heo720ba122006-05-31 18:28:13 +09005991 */
Tejun Heod127ea72008-07-31 16:09:34 +09005992 __ata_port_for_each_link(link, ap) {
Tejun Heo299246f2008-11-03 19:27:07 +09005993 sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
Tejun Heo41bda9c2007-08-06 18:36:24 +09005994 ata_link_for_each_dev(dev, link)
5995 ata_dev_disable(dev);
5996 }
Tejun Heo720ba122006-05-31 18:28:13 +09005997
Tejun Heo720ba122006-05-31 18:28:13 +09005998 /* Final freeze & EH. All in-flight commands are aborted. EH
5999 * will be skipped and retrials will be terminated with bad
6000 * target.
6001 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006002 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006003 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006004 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006005
6006 ata_port_wait_eh(ap);
Oleg Nesterov45a66c12007-07-09 11:46:13 -07006007 cancel_rearming_delayed_work(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006008
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006009 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09006010 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006011 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006012}
6013
6014/**
Tejun Heo0529c152007-01-20 16:00:26 +09006015 * ata_host_detach - Detach all ports of an ATA host
6016 * @host: Host to detach
6017 *
6018 * Detach all ports of @host.
6019 *
6020 * LOCKING:
6021 * Kernel thread context (may sleep).
6022 */
6023void ata_host_detach(struct ata_host *host)
6024{
6025 int i;
6026
6027 for (i = 0; i < host->n_ports; i++)
6028 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09006029
6030 /* the host is dead now, dissociate ACPI */
6031 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09006032}
6033
Jeff Garzik374b1872005-08-30 05:42:52 -04006034#ifdef CONFIG_PCI
6035
Edward Falk0baab862005-06-02 18:17:13 -04006036/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006037 * ata_pci_remove_one - PCI layer callback for device removal
6038 * @pdev: PCI device that was removed
6039 *
Tejun Heob878ca52007-01-20 16:00:28 +09006040 * PCI layer indicates to libata via this hook that hot-unplug or
6041 * module unload event has occurred. Detach all ports. Resource
6042 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006043 *
6044 * LOCKING:
6045 * Inherited from PCI layer (may sleep).
6046 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006047void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006048{
Jeff Garzik28555682007-10-11 17:12:35 -04006049 struct device *dev = &pdev->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04006050 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006051
Tejun Heob878ca52007-01-20 16:00:28 +09006052 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006053}
6054
6055/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006056int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006057{
6058 unsigned long tmp = 0;
6059
6060 switch (bits->width) {
6061 case 1: {
6062 u8 tmp8 = 0;
6063 pci_read_config_byte(pdev, bits->reg, &tmp8);
6064 tmp = tmp8;
6065 break;
6066 }
6067 case 2: {
6068 u16 tmp16 = 0;
6069 pci_read_config_word(pdev, bits->reg, &tmp16);
6070 tmp = tmp16;
6071 break;
6072 }
6073 case 4: {
6074 u32 tmp32 = 0;
6075 pci_read_config_dword(pdev, bits->reg, &tmp32);
6076 tmp = tmp32;
6077 break;
6078 }
6079
6080 default:
6081 return -EINVAL;
6082 }
6083
6084 tmp &= bits->mask;
6085
6086 return (tmp == bits->val) ? 1 : 0;
6087}
Jens Axboe9b847542006-01-06 09:28:07 +01006088
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006089#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006090void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006091{
6092 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006093 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006094
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01006095 if (mesg.event & PM_EVENT_SLEEP)
Tejun Heo500530f2006-07-03 16:07:27 +09006096 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006097}
6098
Tejun Heo553c4aa2006-12-26 19:39:50 +09006099int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006100{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006101 int rc;
6102
Jens Axboe9b847542006-01-06 09:28:07 +01006103 pci_set_power_state(pdev, PCI_D0);
6104 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006105
Tejun Heob878ca52007-01-20 16:00:28 +09006106 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006107 if (rc) {
6108 dev_printk(KERN_ERR, &pdev->dev,
6109 "failed to enable device after resume (%d)\n", rc);
6110 return rc;
6111 }
6112
Jens Axboe9b847542006-01-06 09:28:07 +01006113 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006114 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006115}
6116
Tejun Heo3c5100c2006-07-26 16:58:33 +09006117int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006118{
Jeff Garzikcca39742006-08-24 03:19:22 -04006119 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006120 int rc = 0;
6121
Jeff Garzikcca39742006-08-24 03:19:22 -04006122 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006123 if (rc)
6124 return rc;
6125
Tejun Heo3c5100c2006-07-26 16:58:33 +09006126 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006127
6128 return 0;
6129}
6130
6131int ata_pci_device_resume(struct pci_dev *pdev)
6132{
Jeff Garzikcca39742006-08-24 03:19:22 -04006133 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006134 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006135
Tejun Heo553c4aa2006-12-26 19:39:50 +09006136 rc = ata_pci_device_do_resume(pdev);
6137 if (rc == 0)
6138 ata_host_resume(host);
6139 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006140}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006141#endif /* CONFIG_PM */
6142
Linus Torvalds1da177e2005-04-16 15:20:36 -07006143#endif /* CONFIG_PCI */
6144
Tejun Heo33267322008-02-13 09:15:09 +09006145static int __init ata_parse_force_one(char **cur,
6146 struct ata_force_ent *force_ent,
6147 const char **reason)
6148{
6149 /* FIXME: Currently, there's no way to tag init const data and
6150 * using __initdata causes build failure on some versions of
6151 * gcc. Once __initdataconst is implemented, add const to the
6152 * following structure.
6153 */
6154 static struct ata_force_param force_tbl[] __initdata = {
6155 { "40c", .cbl = ATA_CBL_PATA40 },
6156 { "80c", .cbl = ATA_CBL_PATA80 },
6157 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6158 { "unk", .cbl = ATA_CBL_PATA_UNK },
6159 { "ign", .cbl = ATA_CBL_PATA_IGN },
6160 { "sata", .cbl = ATA_CBL_SATA },
6161 { "1.5Gbps", .spd_limit = 1 },
6162 { "3.0Gbps", .spd_limit = 2 },
6163 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6164 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6165 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6166 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6167 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6168 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6169 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6170 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6171 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6172 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6173 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6174 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6175 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6176 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6177 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6178 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6179 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6180 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6181 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6182 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6183 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6184 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6185 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6186 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6187 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6188 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6189 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6190 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6191 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6192 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6193 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6194 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6195 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6196 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6197 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6198 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
Tejun Heo05944bd2008-08-13 20:19:09 +09006199 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6200 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6201 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
Tejun Heo33267322008-02-13 09:15:09 +09006202 };
6203 char *start = *cur, *p = *cur;
6204 char *id, *val, *endp;
6205 const struct ata_force_param *match_fp = NULL;
6206 int nr_matches = 0, i;
6207
6208 /* find where this param ends and update *cur */
6209 while (*p != '\0' && *p != ',')
6210 p++;
6211
6212 if (*p == '\0')
6213 *cur = p;
6214 else
6215 *cur = p + 1;
6216
6217 *p = '\0';
6218
6219 /* parse */
6220 p = strchr(start, ':');
6221 if (!p) {
6222 val = strstrip(start);
6223 goto parse_val;
6224 }
6225 *p = '\0';
6226
6227 id = strstrip(start);
6228 val = strstrip(p + 1);
6229
6230 /* parse id */
6231 p = strchr(id, '.');
6232 if (p) {
6233 *p++ = '\0';
6234 force_ent->device = simple_strtoul(p, &endp, 10);
6235 if (p == endp || *endp != '\0') {
6236 *reason = "invalid device";
6237 return -EINVAL;
6238 }
6239 }
6240
6241 force_ent->port = simple_strtoul(id, &endp, 10);
6242 if (p == endp || *endp != '\0') {
6243 *reason = "invalid port/link";
6244 return -EINVAL;
6245 }
6246
6247 parse_val:
6248 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6249 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6250 const struct ata_force_param *fp = &force_tbl[i];
6251
6252 if (strncasecmp(val, fp->name, strlen(val)))
6253 continue;
6254
6255 nr_matches++;
6256 match_fp = fp;
6257
6258 if (strcasecmp(val, fp->name) == 0) {
6259 nr_matches = 1;
6260 break;
6261 }
6262 }
6263
6264 if (!nr_matches) {
6265 *reason = "unknown value";
6266 return -EINVAL;
6267 }
6268 if (nr_matches > 1) {
6269 *reason = "ambigious value";
6270 return -EINVAL;
6271 }
6272
6273 force_ent->param = *match_fp;
6274
6275 return 0;
6276}
6277
6278static void __init ata_parse_force_param(void)
6279{
6280 int idx = 0, size = 1;
6281 int last_port = -1, last_device = -1;
6282 char *p, *cur, *next;
6283
6284 /* calculate maximum number of params and allocate force_tbl */
6285 for (p = ata_force_param_buf; *p; p++)
6286 if (*p == ',')
6287 size++;
6288
6289 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6290 if (!ata_force_tbl) {
6291 printk(KERN_WARNING "ata: failed to extend force table, "
6292 "libata.force ignored\n");
6293 return;
6294 }
6295
6296 /* parse and populate the table */
6297 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6298 const char *reason = "";
6299 struct ata_force_ent te = { .port = -1, .device = -1 };
6300
6301 next = cur;
6302 if (ata_parse_force_one(&next, &te, &reason)) {
6303 printk(KERN_WARNING "ata: failed to parse force "
6304 "parameter \"%s\" (%s)\n",
6305 cur, reason);
6306 continue;
6307 }
6308
6309 if (te.port == -1) {
6310 te.port = last_port;
6311 te.device = last_device;
6312 }
6313
6314 ata_force_tbl[idx++] = te;
6315
6316 last_port = te.port;
6317 last_device = te.device;
6318 }
6319
6320 ata_force_tbl_size = idx;
6321}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006322
Linus Torvalds1da177e2005-04-16 15:20:36 -07006323static int __init ata_init(void)
6324{
Tejun Heo33267322008-02-13 09:15:09 +09006325 ata_parse_force_param();
6326
Linus Torvalds1da177e2005-04-16 15:20:36 -07006327 ata_wq = create_workqueue("ata");
6328 if (!ata_wq)
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006329 goto free_force_tbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006330
Tejun Heo453b07a2006-05-31 18:27:42 +09006331 ata_aux_wq = create_singlethread_workqueue("ata_aux");
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006332 if (!ata_aux_wq)
6333 goto free_wq;
Tejun Heo453b07a2006-05-31 18:27:42 +09006334
Linus Torvalds1da177e2005-04-16 15:20:36 -07006335 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6336 return 0;
Elias Oltmanns49ea3b02008-07-30 12:32:39 -07006337
6338free_wq:
6339 destroy_workqueue(ata_wq);
6340free_force_tbl:
6341 kfree(ata_force_tbl);
6342 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006343}
6344
6345static void __exit ata_exit(void)
6346{
Tejun Heo33267322008-02-13 09:15:09 +09006347 kfree(ata_force_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006348 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09006349 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006350}
6351
Brian Kinga4625082006-11-13 16:32:36 -06006352subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006353module_exit(ata_exit);
6354
Jeff Garzik67846b32005-10-05 02:58:32 -04006355static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07006356static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04006357
6358int ata_ratelimit(void)
6359{
6360 int rc;
6361 unsigned long flags;
6362
6363 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6364
6365 if (time_after(jiffies, ratelimit_time)) {
6366 rc = 1;
6367 ratelimit_time = jiffies + (HZ/5);
6368 } else
6369 rc = 0;
6370
6371 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6372
6373 return rc;
6374}
6375
Tejun Heoc22daff2006-04-11 22:22:29 +09006376/**
6377 * ata_wait_register - wait until register value changes
6378 * @reg: IO-mapped register
6379 * @mask: Mask to apply to read register value
6380 * @val: Wait condition
Tejun Heo341c2c92008-05-20 02:17:51 +09006381 * @interval: polling interval in milliseconds
6382 * @timeout: timeout in milliseconds
Tejun Heoc22daff2006-04-11 22:22:29 +09006383 *
6384 * Waiting for some bits of register to change is a common
6385 * operation for ATA controllers. This function reads 32bit LE
6386 * IO-mapped register @reg and tests for the following condition.
6387 *
6388 * (*@reg & mask) != val
6389 *
6390 * If the condition is met, it returns; otherwise, the process is
6391 * repeated after @interval_msec until timeout.
6392 *
6393 * LOCKING:
6394 * Kernel thread context (may sleep)
6395 *
6396 * RETURNS:
6397 * The final register value.
6398 */
6399u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
Tejun Heo341c2c92008-05-20 02:17:51 +09006400 unsigned long interval, unsigned long timeout)
Tejun Heoc22daff2006-04-11 22:22:29 +09006401{
Tejun Heo341c2c92008-05-20 02:17:51 +09006402 unsigned long deadline;
Tejun Heoc22daff2006-04-11 22:22:29 +09006403 u32 tmp;
6404
6405 tmp = ioread32(reg);
6406
6407 /* Calculate timeout _after_ the first read to make sure
6408 * preceding writes reach the controller before starting to
6409 * eat away the timeout.
6410 */
Tejun Heo341c2c92008-05-20 02:17:51 +09006411 deadline = ata_deadline(jiffies, timeout);
Tejun Heoc22daff2006-04-11 22:22:29 +09006412
Tejun Heo341c2c92008-05-20 02:17:51 +09006413 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6414 msleep(interval);
Tejun Heoc22daff2006-04-11 22:22:29 +09006415 tmp = ioread32(reg);
6416 }
6417
6418 return tmp;
6419}
6420
Linus Torvalds1da177e2005-04-16 15:20:36 -07006421/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006422 * Dummy port_ops
6423 */
Tejun Heodd5b06c2006-08-10 16:59:12 +09006424static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6425{
6426 return AC_ERR_SYSTEM;
6427}
6428
Tejun Heo182d7bb2008-04-07 22:47:21 +09006429static void ata_dummy_error_handler(struct ata_port *ap)
6430{
6431 /* truly dummy */
6432}
6433
Tejun Heo029cfd62008-03-25 12:22:49 +09006434struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09006435 .qc_prep = ata_noop_qc_prep,
6436 .qc_issue = ata_dummy_qc_issue,
Tejun Heo182d7bb2008-04-07 22:47:21 +09006437 .error_handler = ata_dummy_error_handler,
Tejun Heodd5b06c2006-08-10 16:59:12 +09006438};
6439
Tejun Heo21b0ad42007-04-17 23:44:07 +09006440const struct ata_port_info ata_dummy_port_info = {
6441 .port_ops = &ata_dummy_port_ops,
6442};
6443
Tejun Heodd5b06c2006-08-10 16:59:12 +09006444/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006445 * libata is essentially a library of internal helper functions for
6446 * low-level ATA host controller drivers. As such, the API/ABI is
6447 * likely to change as new drivers are added and updated.
6448 * Do not depend on ABI/API stability.
6449 */
Tejun Heoe9c83912006-07-03 16:07:26 +09006450EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6451EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6452EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heo029cfd62008-03-25 12:22:49 +09006453EXPORT_SYMBOL_GPL(ata_base_port_ops);
6454EXPORT_SYMBOL_GPL(sata_port_ops);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006455EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09006456EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Tejun Heoaadffb62008-07-31 17:02:41 +09006457EXPORT_SYMBOL_GPL(__ata_port_next_link);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006458EXPORT_SYMBOL_GPL(ata_std_bios_param);
Jeff Garzikcca39742006-08-24 03:19:22 -04006459EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006460EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006461EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heob1c72912008-07-31 17:02:43 +09006462EXPORT_SYMBOL_GPL(ata_slave_link_init);
Tejun Heoecef7252007-04-17 23:44:06 +09006463EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006464EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006465EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09006466EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006467EXPORT_SYMBOL_GPL(ata_sg_init);
Tejun Heof686bcb2006-05-15 20:58:05 +09006468EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006469EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Tejun Heo436d34b2008-04-02 17:28:46 +09006470EXPORT_SYMBOL_GPL(atapi_cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006471EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6472EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09006473EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6474EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6475EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6476EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6477EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6478EXPORT_SYMBOL_GPL(ata_mode_string);
6479EXPORT_SYMBOL_GPL(ata_id_xfermask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006480EXPORT_SYMBOL_GPL(ata_port_start);
Alan04351822007-03-06 02:37:52 -08006481EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo31cc23b2007-09-23 13:14:12 +09006482EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Brian Kinge46834c2006-03-17 17:04:03 -06006483EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006484EXPORT_SYMBOL_GPL(ata_port_probe);
Alan10305f02007-02-20 18:01:59 +00006485EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006486EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heoaa2731a2008-04-07 22:47:19 +09006487EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heo936fd732007-08-06 18:36:23 +09006488EXPORT_SYMBOL_GPL(sata_link_debounce);
6489EXPORT_SYMBOL_GPL(sata_link_resume);
Tejun Heo0aa11132008-04-07 22:47:18 +09006490EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heocc0680a2007-08-06 18:36:23 +09006491EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heo57c9efd2008-04-07 22:47:19 +09006492EXPORT_SYMBOL_GPL(sata_std_hardreset);
Tejun Heo203c75b2008-04-07 22:47:18 +09006493EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006494EXPORT_SYMBOL_GPL(ata_dev_classify);
6495EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006496EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04006497EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09006498EXPORT_SYMBOL_GPL(ata_wait_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006499EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6500EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006501EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006502EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006503EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Tejun Heo34bf2172006-05-15 20:57:46 +09006504EXPORT_SYMBOL_GPL(sata_scr_valid);
6505EXPORT_SYMBOL_GPL(sata_scr_read);
6506EXPORT_SYMBOL_GPL(sata_scr_write);
6507EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09006508EXPORT_SYMBOL_GPL(ata_link_online);
6509EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006510#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006511EXPORT_SYMBOL_GPL(ata_host_suspend);
6512EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006513#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006514EXPORT_SYMBOL_GPL(ata_id_string);
6515EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox963e4972008-07-24 17:16:06 +01006516EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006517EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6518
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006519EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09006520EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04006521EXPORT_SYMBOL_GPL(ata_timing_compute);
6522EXPORT_SYMBOL_GPL(ata_timing_merge);
Tejun Heoa0f79b92007-12-18 16:33:05 +09006523EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
Alan Cox452503f2005-10-21 19:01:32 -04006524
Linus Torvalds1da177e2005-04-16 15:20:36 -07006525#ifdef CONFIG_PCI
6526EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006527EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006528#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006529EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6530EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006531EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6532EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006533#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006534#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006535
Tejun Heob64bbc32007-07-16 14:29:39 +09006536EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6537EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6538EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09006539EXPORT_SYMBOL_GPL(ata_port_desc);
6540#ifdef CONFIG_PCI
6541EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6542#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09006543EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09006544EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006545EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006546EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09006547EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09006548EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6549EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006550EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6551EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Mark Lord10acf3b2008-05-02 02:14:53 -04006552EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
Tejun Heo022bdb02006-05-15 20:58:22 +09006553EXPORT_SYMBOL_GPL(ata_do_eh);
Tejun Heoa1efdab2008-03-25 12:22:50 +09006554EXPORT_SYMBOL_GPL(ata_std_error_handler);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006555
6556EXPORT_SYMBOL_GPL(ata_cable_40wire);
6557EXPORT_SYMBOL_GPL(ata_cable_80wire);
6558EXPORT_SYMBOL_GPL(ata_cable_unknown);
Tejun Heoc88f90c2007-11-27 19:43:48 +09006559EXPORT_SYMBOL_GPL(ata_cable_ignore);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006560EXPORT_SYMBOL_GPL(ata_cable_sata);