blob: d050e073e57035a99b969c50205a4227ed6a8812 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-scsi.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
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090036#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
40#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <scsi/scsi_host.h>
Christoph Hellwigbeb40482006-06-10 18:01:03 +020042#include <scsi/scsi_cmnd.h>
Mike Christie85837eb2005-11-11 16:38:53 -060043#include <scsi/scsi_eh.h>
Jeff Garzik005a5a02005-10-30 23:31:48 -050044#include <scsi/scsi_device.h>
Tejun Heoa6e6ce82006-05-15 21:03:48 +090045#include <scsi/scsi_tcq.h>
Tejun Heo30afc842006-03-18 18:40:14 +090046#include <scsi/scsi_transport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/libata.h>
Jeff Garzikb0955182005-05-12 15:45:22 -040048#include <linux/hdreg.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040049#include <linux/uaccess.h>
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +010050#include <linux/suspend.h>
Christoph Hellwig18f0f972009-11-17 10:00:47 -050051#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53#include "libata.h"
Gwendal Grignoud9027472010-05-25 12:31:38 -070054#include "libata-transport.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Tejun Heo87340e92008-04-28 17:48:51 +090056#define ATA_SCSI_RBUF_SIZE 4096
57
58static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
59static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
Jeff Garzikb0955182005-05-12 15:45:22 -040060
Tejun Heoad706992006-12-17 10:45:57 +090061typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090062
Jeff Garzik2dcb4072007-10-19 06:42:56 -040063static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090064 const struct scsi_device *scsidev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -040065static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090066 const struct scsi_device *scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040068#define RW_RECOVERY_MPAGE 0x1
69#define RW_RECOVERY_MPAGE_LEN 12
70#define CACHE_MPAGE 0x8
71#define CACHE_MPAGE_LEN 20
72#define CONTROL_MPAGE 0xa
73#define CONTROL_MPAGE_LEN 12
74#define ALL_MPAGES 0x3f
75#define ALL_SUB_MPAGES 0xff
76
77
Jeff Garzik24f75682007-09-21 07:54:49 -040078static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040079 RW_RECOVERY_MPAGE,
80 RW_RECOVERY_MPAGE_LEN - 2,
Jeff Garzik24f75682007-09-21 07:54:49 -040081 (1 << 7), /* AWRE */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040082 0, /* read retry count */
83 0, 0, 0, 0,
84 0, /* write retry count */
85 0, 0, 0
86};
87
88static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
89 CACHE_MPAGE,
90 CACHE_MPAGE_LEN - 2,
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0
95};
96
97static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
98 CONTROL_MPAGE,
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
104};
105
Tejun Heoc93b2632010-09-01 17:50:04 +0200106static const char *ata_lpm_policy_names[] = {
107 [ATA_LPM_UNKNOWN] = "max_performance",
108 [ATA_LPM_MAX_POWER] = "max_performance",
109 [ATA_LPM_MED_POWER] = "medium_power",
110 [ATA_LPM_MIN_POWER] = "min_power",
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400111};
112
Tejun Heoc93b2632010-09-01 17:50:04 +0200113static ssize_t ata_scsi_lpm_store(struct device *dev,
114 struct device_attribute *attr,
115 const char *buf, size_t count)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400116{
Tony Jonesee959b02008-02-22 00:13:36 +0100117 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400118 struct ata_port *ap = ata_shost_to_port(shost);
Tejun Heoc93b2632010-09-01 17:50:04 +0200119 enum ata_lpm_policy policy;
Tejun Heo6b7ae952010-09-01 17:50:06 +0200120 unsigned long flags;
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400121
Tejun Heoc93b2632010-09-01 17:50:04 +0200122 /* UNKNOWN is internal state, iterate from MAX_POWER */
123 for (policy = ATA_LPM_MAX_POWER;
124 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
125 const char *name = ata_lpm_policy_names[policy];
126
127 if (strncmp(name, buf, strlen(name)) == 0)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400128 break;
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400129 }
Tejun Heoc93b2632010-09-01 17:50:04 +0200130 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400131 return -EINVAL;
132
Tejun Heo6b7ae952010-09-01 17:50:06 +0200133 spin_lock_irqsave(ap->lock, flags);
134 ap->target_lpm_policy = policy;
135 ata_port_schedule_eh(ap);
136 spin_unlock_irqrestore(ap->lock, flags);
137
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400138 return count;
139}
140
Tejun Heoc93b2632010-09-01 17:50:04 +0200141static ssize_t ata_scsi_lpm_show(struct device *dev,
142 struct device_attribute *attr, char *buf)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400143{
Tony Jonesee959b02008-02-22 00:13:36 +0100144 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400145 struct ata_port *ap = ata_shost_to_port(shost);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400146
Tejun Heo6b7ae952010-09-01 17:50:06 +0200147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400148 return -EINVAL;
149
Tejun Heoc93b2632010-09-01 17:50:04 +0200150 return snprintf(buf, PAGE_SIZE, "%s\n",
Tejun Heo6b7ae952010-09-01 17:50:06 +0200151 ata_lpm_policy_names[ap->target_lpm_policy]);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400152}
Tony Jonesee959b02008-02-22 00:13:36 +0100153DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
Tejun Heoc93b2632010-09-01 17:50:04 +0200154 ata_scsi_lpm_show, ata_scsi_lpm_store);
Tony Jonesee959b02008-02-22 00:13:36 +0100155EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400156
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200157static ssize_t ata_scsi_park_show(struct device *device,
158 struct device_attribute *attr, char *buf)
159{
160 struct scsi_device *sdev = to_scsi_device(device);
161 struct ata_port *ap;
162 struct ata_link *link;
163 struct ata_device *dev;
Elias Oltmannsa4641892008-11-03 19:01:08 +0900164 unsigned long flags, now;
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200165 unsigned int uninitialized_var(msecs);
166 int rc = 0;
167
168 ap = ata_shost_to_port(sdev->host);
169
170 spin_lock_irqsave(ap->lock, flags);
171 dev = ata_scsi_find_dev(ap, sdev);
172 if (!dev) {
173 rc = -ENODEV;
174 goto unlock;
175 }
176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
177 rc = -EOPNOTSUPP;
178 goto unlock;
179 }
180
181 link = dev->link;
Elias Oltmannsa4641892008-11-03 19:01:08 +0900182 now = jiffies;
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
184 link->eh_context.unloaded_mask & (1 << dev->devno) &&
Elias Oltmannsa4641892008-11-03 19:01:08 +0900185 time_after(dev->unpark_deadline, now))
186 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200187 else
188 msecs = 0;
189
190unlock:
191 spin_unlock_irq(ap->lock);
192
193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
194}
195
196static ssize_t ata_scsi_park_store(struct device *device,
197 struct device_attribute *attr,
198 const char *buf, size_t len)
199{
200 struct scsi_device *sdev = to_scsi_device(device);
201 struct ata_port *ap;
202 struct ata_device *dev;
203 long int input;
204 unsigned long flags;
205 int rc;
206
207 rc = strict_strtol(buf, 10, &input);
208 if (rc || input < -2)
209 return -EINVAL;
210 if (input > ATA_TMOUT_MAX_PARK) {
211 rc = -EOVERFLOW;
212 input = ATA_TMOUT_MAX_PARK;
213 }
214
215 ap = ata_shost_to_port(sdev->host);
216
217 spin_lock_irqsave(ap->lock, flags);
218 dev = ata_scsi_find_dev(ap, sdev);
219 if (unlikely(!dev)) {
220 rc = -ENODEV;
221 goto unlock;
222 }
223 if (dev->class != ATA_DEV_ATA) {
224 rc = -EOPNOTSUPP;
225 goto unlock;
226 }
227
228 if (input >= 0) {
229 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
230 rc = -EOPNOTSUPP;
231 goto unlock;
232 }
233
234 dev->unpark_deadline = ata_deadline(jiffies, input);
235 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
236 ata_port_schedule_eh(ap);
237 complete(&ap->park_req_pending);
238 } else {
239 switch (input) {
240 case -1:
241 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
242 break;
243 case -2:
244 dev->flags |= ATA_DFLAG_NO_UNLOAD;
245 break;
246 }
247 }
248unlock:
249 spin_unlock_irqrestore(ap->lock, flags);
250
251 return rc ? rc : len;
252}
253DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
254 ata_scsi_park_show, ata_scsi_park_store);
255EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
256
Tejun Heof0761be2008-04-28 17:16:52 +0900257static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
258{
259 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
260
261 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
262}
263
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700264static ssize_t
265ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
267{
268 struct Scsi_Host *shost = class_to_shost(dev);
269 struct ata_port *ap = ata_shost_to_port(shost);
270 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
271 return ap->ops->em_store(ap, buf, count);
272 return -EINVAL;
273}
274
275static ssize_t
276ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
277 char *buf)
278{
279 struct Scsi_Host *shost = class_to_shost(dev);
280 struct ata_port *ap = ata_shost_to_port(shost);
281
282 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
283 return ap->ops->em_show(ap, buf);
284 return -EINVAL;
285}
Vitaly Mayatskikhea7a5ed2009-05-04 15:48:45 +0200286DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700287 ata_scsi_em_message_show, ata_scsi_em_message_store);
288EXPORT_SYMBOL_GPL(dev_attr_em_message);
289
290static ssize_t
291ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
292 char *buf)
293{
294 struct Scsi_Host *shost = class_to_shost(dev);
295 struct ata_port *ap = ata_shost_to_port(shost);
296
297 return snprintf(buf, 23, "%d\n", ap->em_message_type);
298}
299DEVICE_ATTR(em_message_type, S_IRUGO,
300 ata_scsi_em_message_type_show, NULL);
301EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
302
303static ssize_t
304ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
305 char *buf)
306{
307 struct scsi_device *sdev = to_scsi_device(dev);
308 struct ata_port *ap = ata_shost_to_port(sdev->host);
309 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
310
311 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
312 return ap->ops->sw_activity_show(atadev, buf);
313 return -EINVAL;
314}
315
316static ssize_t
317ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
318 const char *buf, size_t count)
319{
320 struct scsi_device *sdev = to_scsi_device(dev);
321 struct ata_port *ap = ata_shost_to_port(sdev->host);
322 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
323 enum sw_activity val;
324 int rc;
325
326 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
327 val = simple_strtoul(buf, NULL, 0);
328 switch (val) {
329 case OFF: case BLINK_ON: case BLINK_OFF:
330 rc = ap->ops->sw_activity_store(atadev, val);
331 if (!rc)
332 return count;
333 else
334 return rc;
335 }
336 }
337 return -EINVAL;
338}
Vitaly Mayatskikhea7a5ed2009-05-04 15:48:45 +0200339DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700340 ata_scsi_activity_store);
341EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
342
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200343struct device_attribute *ata_common_sdev_attrs[] = {
344 &dev_attr_unload_heads,
345 NULL
346};
347EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
348
Douglas Gilbertae006512005-10-09 09:09:35 -0400349static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
350 void (*done)(struct scsi_cmnd *))
351{
352 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
353 /* "Invalid field in cbd" */
354 done(cmd);
355}
356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357/**
358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
359 * @sdev: SCSI device for which BIOS geometry is to be determined
360 * @bdev: block device associated with @sdev
361 * @capacity: capacity of SCSI device
362 * @geom: location to which geometry will be output
363 *
364 * Generic bios head/sector/cylinder calculator
365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
366 * mapping. Some situations may arise where the disk is not
367 * bootable if this is not used.
368 *
369 * LOCKING:
370 * Defined by the SCSI layer. We don't really care.
371 *
372 * RETURNS:
373 * Zero.
374 */
375int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
376 sector_t capacity, int geom[])
377{
378 geom[0] = 255;
379 geom[1] = 63;
380 sector_div(capacity, 255*63);
381 geom[2] = capacity;
382
383 return 0;
384}
385
Jeff Garzikb0955182005-05-12 15:45:22 -0400386/**
Tejun Heod8d91292010-05-15 20:09:34 +0200387 * ata_scsi_unlock_native_capacity - unlock native capacity
388 * @sdev: SCSI device to adjust device capacity for
389 *
390 * This function is called if a partition on @sdev extends beyond
391 * the end of the device. It requests EH to unlock HPA.
392 *
393 * LOCKING:
394 * Defined by the SCSI layer. Might sleep.
395 */
396void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
397{
398 struct ata_port *ap = ata_shost_to_port(sdev->host);
399 struct ata_device *dev;
400 unsigned long flags;
401
402 spin_lock_irqsave(ap->lock, flags);
403
404 dev = ata_scsi_find_dev(ap, sdev);
405 if (dev && dev->n_sectors < dev->n_native_sectors) {
406 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
407 dev->link->eh_info.action |= ATA_EH_RESET;
408 ata_port_schedule_eh(ap);
409 }
410
411 spin_unlock_irqrestore(ap->lock, flags);
412 ata_port_wait_eh(ap);
413}
414
415/**
Tejun Heo5924b742007-01-02 20:20:07 +0900416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
Randy Dunlap5eb66fe2009-01-20 16:28:59 -0800417 * @ap: target port
Tejun Heo5924b742007-01-02 20:20:07 +0900418 * @sdev: SCSI device to get identify data for
419 * @arg: User buffer area for identify data
420 *
421 * LOCKING:
422 * Defined by the SCSI layer. We don't really care.
423 *
424 * RETURNS:
425 * Zero on success, negative errno on error.
426 */
Jeff Garzik94be9a52009-01-16 10:17:09 -0500427static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
428 void __user *arg)
Tejun Heo5924b742007-01-02 20:20:07 +0900429{
Tejun Heo5924b742007-01-02 20:20:07 +0900430 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
431 u16 __user *dst = arg;
432 char buf[40];
433
434 if (!dev)
435 return -ENOMSG;
436
437 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
438 return -EFAULT;
439
440 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
441 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
442 return -EFAULT;
443
444 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
445 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
446 return -EFAULT;
447
448 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
449 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
450 return -EFAULT;
451
452 return 0;
453}
454
455/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800457 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400458 * @arg: User provided data for issuing command
459 *
460 * LOCKING:
461 * Defined by the SCSI layer. We don't really care.
462 *
463 * RETURNS:
464 * Zero on success, negative errno on error.
465 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400466int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
467{
468 int rc = 0;
469 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700470 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400471 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600472 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700473 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400474
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500475 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400476 return -EINVAL;
477
478 if (copy_from_user(args, arg, sizeof(args)))
479 return -EFAULT;
480
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
482 if (!sensebuf)
483 return -ENOMEM;
484
Jeff Garzikb0955182005-05-12 15:45:22 -0400485 memset(scsi_cmd, 0, sizeof(scsi_cmd));
486
487 if (args[3]) {
Grant Grundler295124d2010-08-17 10:56:53 -0700488 argsize = ATA_SECT_SIZE * args[3];
Jeff Garzikb0955182005-05-12 15:45:22 -0400489 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400490 if (argbuf == NULL) {
491 rc = -ENOMEM;
492 goto error;
493 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400494
495 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
496 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400497 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600498 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400499 } else {
500 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700501 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600502 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400503 }
504
505 scsi_cmd[0] = ATA_16;
506
507 scsi_cmd[4] = args[2];
Bartlomiej Zolnierkiewicza4f19042008-10-10 22:39:20 +0200508 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
Jeff Garzikb0955182005-05-12 15:45:22 -0400509 scsi_cmd[6] = args[3];
510 scsi_cmd[8] = args[1];
511 scsi_cmd[10] = 0x4f;
512 scsi_cmd[12] = 0xc2;
513 } else {
514 scsi_cmd[6] = args[1];
515 }
516 scsi_cmd[14] = args[0];
517
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700520 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900521 sensebuf, (10*HZ), 5, 0, NULL);
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700522
523 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
524 u8 *desc = sensebuf + 8;
525 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526
527 /* If we set cc then ATA pass-through will cause a
528 * check condition even if no error. Filter that. */
529 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
530 struct scsi_sense_hdr sshdr;
531 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400532 &sshdr);
533 if (sshdr.sense_key == 0 &&
534 sshdr.asc == 0 && sshdr.ascq == 0)
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700535 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
536 }
537
538 /* Send userspace a few ATA registers (same as drivers/ide) */
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400539 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
540 desc[0] == 0x09) { /* code is "ATA Descriptor" */
541 args[0] = desc[13]; /* status */
542 args[1] = desc[3]; /* error */
543 args[2] = desc[5]; /* sector count (0:7) */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700544 if (copy_to_user(arg, args, sizeof(args)))
545 rc = -EFAULT;
546 }
547 }
548
549
550 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400551 rc = -EIO;
552 goto error;
553 }
554
Jeff Garzikb0955182005-05-12 15:45:22 -0400555 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500556 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400557 rc = -EFAULT;
558error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700559 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700560 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400561 return rc;
562}
563
564/**
565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800566 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400567 * @arg: User provided data for issuing command
568 *
569 * LOCKING:
570 * Defined by the SCSI layer. We don't really care.
571 *
572 * RETURNS:
573 * Zero on success, negative errno on error.
574 */
575int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
576{
577 int rc = 0;
578 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800579 u8 args[7], *sensebuf = NULL;
580 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400581
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500582 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400583 return -EINVAL;
584
585 if (copy_from_user(args, arg, sizeof(args)))
586 return -EFAULT;
587
David Milburnaf068bd2007-01-30 00:59:15 -0800588 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
589 if (!sensebuf)
590 return -ENOMEM;
591
Jeff Garzikb0955182005-05-12 15:45:22 -0400592 memset(scsi_cmd, 0, sizeof(scsi_cmd));
593 scsi_cmd[0] = ATA_16;
594 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800595 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400596 scsi_cmd[4] = args[1];
597 scsi_cmd[6] = args[2];
598 scsi_cmd[8] = args[3];
599 scsi_cmd[10] = args[4];
600 scsi_cmd[12] = args[5];
Mark Lord277239f2007-03-30 17:45:52 -0400601 scsi_cmd[13] = args[6] & 0x4f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400602 scsi_cmd[14] = args[0];
603
Jeff Garzikb0955182005-05-12 15:45:22 -0400604 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500605 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800606 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900607 sensebuf, (10*HZ), 5, 0, NULL);
Jeff Garzikb0955182005-05-12 15:45:22 -0400608
David Milburnaf068bd2007-01-30 00:59:15 -0800609 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
610 u8 *desc = sensebuf + 8;
611 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612
613 /* If we set cc then ATA pass-through will cause a
614 * check condition even if no error. Filter that. */
615 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
616 struct scsi_sense_hdr sshdr;
617 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
618 &sshdr);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400619 if (sshdr.sense_key == 0 &&
620 sshdr.asc == 0 && sshdr.ascq == 0)
David Milburnaf068bd2007-01-30 00:59:15 -0800621 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
622 }
623
624 /* Send userspace ATA registers */
625 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
626 desc[0] == 0x09) {/* code is "ATA Descriptor" */
627 args[0] = desc[13]; /* status */
628 args[1] = desc[3]; /* error */
629 args[2] = desc[5]; /* sector count (0:7) */
630 args[3] = desc[7]; /* lbal */
631 args[4] = desc[9]; /* lbam */
632 args[5] = desc[11]; /* lbah */
633 args[6] = desc[12]; /* select */
634 if (copy_to_user(arg, args, sizeof(args)))
635 rc = -EFAULT;
636 }
637 }
638
639 if (cmd_result) {
640 rc = -EIO;
641 goto error;
642 }
643
644 error:
645 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400646 return rc;
647}
648
Alan Coxe3cf95d2009-04-09 17:31:17 +0100649static int ata_ioc32(struct ata_port *ap)
650{
651 if (ap->flags & ATA_FLAG_PIO_DMA)
652 return 1;
653 if (ap->pflags & ATA_PFLAG_PIO32)
654 return 1;
655 return 0;
656}
657
Jeff Garzik94be9a52009-01-16 10:17:09 -0500658int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
659 int cmd, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 int val = -EINVAL, rc = -EINVAL;
Alan Coxe3cf95d2009-04-09 17:31:17 +0100662 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 switch (cmd) {
665 case ATA_IOC_GET_IO32:
Alan Coxe3cf95d2009-04-09 17:31:17 +0100666 spin_lock_irqsave(ap->lock, flags);
667 val = ata_ioc32(ap);
668 spin_unlock_irqrestore(ap->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 if (copy_to_user(arg, &val, 1))
670 return -EFAULT;
671 return 0;
672
673 case ATA_IOC_SET_IO32:
674 val = (unsigned long) arg;
Alan Coxe3cf95d2009-04-09 17:31:17 +0100675 rc = 0;
676 spin_lock_irqsave(ap->lock, flags);
677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
678 if (val)
679 ap->pflags |= ATA_PFLAG_PIO32;
680 else
681 ap->pflags &= ~ATA_PFLAG_PIO32;
682 } else {
683 if (val != ata_ioc32(ap))
684 rc = -EINVAL;
685 }
686 spin_unlock_irqrestore(ap->lock, flags);
687 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Tejun Heo5924b742007-01-02 20:20:07 +0900689 case HDIO_GET_IDENTITY:
Jeff Garzik94be9a52009-01-16 10:17:09 -0500690 return ata_get_identity(ap, scsidev, arg);
Tejun Heo5924b742007-01-02 20:20:07 +0900691
Jeff Garzikb0955182005-05-12 15:45:22 -0400692 case HDIO_DRIVE_CMD:
693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
694 return -EACCES;
695 return ata_cmd_ioctl(scsidev, arg);
696
697 case HDIO_DRIVE_TASK:
698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
699 return -EACCES;
700 return ata_task_ioctl(scsidev, arg);
701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 default:
703 rc = -ENOTTY;
704 break;
705 }
706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 return rc;
708}
Jeff Garzik94be9a52009-01-16 10:17:09 -0500709EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
710
711int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
712{
713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
714 scsidev, cmd, arg);
715}
716EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
718/**
719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 * @dev: ATA device to which the new command is attached
721 * @cmd: SCSI command that originated this ATA command
722 * @done: SCSI command completion function
723 *
724 * Obtain a reference to an unused ata_queued_cmd structure,
725 * which is the basic libata structure representing a single
726 * ATA command sent to the hardware.
727 *
728 * If a command was available, fill in the SCSI-specific
729 * portions of the structure with information on the
730 * current command.
731 *
732 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400733 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 *
735 * RETURNS:
736 * Command allocated, or %NULL if none available.
737 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100738static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
739 struct scsi_cmnd *cmd,
740 void (*done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741{
742 struct ata_queued_cmd *qc;
743
Tejun Heo8a8bc222008-11-10 14:48:21 +0900744 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 if (qc) {
746 qc->scsicmd = cmd;
747 qc->scsidone = done;
748
Tejun Heoff2aeb12007-12-05 16:43:11 +0900749 qc->sg = scsi_sglist(cmd);
Boaz Harrosh71201652007-09-18 17:48:50 +0200750 qc->n_elem = scsi_sg_count(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 } else {
752 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
753 done(cmd);
754 }
755
756 return qc;
757}
758
Tejun Heoaacda372008-03-18 17:47:43 +0900759static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
760{
761 struct scsi_cmnd *scmd = qc->scsicmd;
762
763 qc->extrabytes = scmd->request->extra_len;
764 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
765}
766
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400768 * ata_dump_status - user friendly display of error info
769 * @id: id of the port in question
770 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400772 * Decode and dump the ATA error/status registers for the user so
773 * that they have some idea what really happened at the non
774 * make-believe layer.
775 *
776 * LOCKING:
777 * inherited from caller
778 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100779static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400780{
781 u8 stat = tf->command, err = tf->feature;
782
783 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
784 if (stat & ATA_BUSY) {
785 printk("Busy }\n"); /* Data is not valid in this case */
786 } else {
787 if (stat & 0x40) printk("DriveReady ");
788 if (stat & 0x20) printk("DeviceFault ");
789 if (stat & 0x10) printk("SeekComplete ");
790 if (stat & 0x08) printk("DataRequest ");
791 if (stat & 0x04) printk("CorrectedError ");
792 if (stat & 0x02) printk("Index ");
793 if (stat & 0x01) printk("Error ");
794 printk("}\n");
795
796 if (err) {
797 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
798 if (err & 0x04) printk("DriveStatusError ");
799 if (err & 0x80) {
800 if (err & 0x04) printk("BadCRC ");
801 else printk("Sector ");
802 }
803 if (err & 0x40) printk("UncorrectableError ");
804 if (err & 0x10) printk("SectorIdNotFound ");
805 if (err & 0x02) printk("TrackZeroNotFound ");
806 if (err & 0x01) printk("AddrMarkNotFound ");
807 printk("}\n");
808 }
809 }
810}
811
812/**
813 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800814 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400815 * @drv_stat: value contained in ATA status register
816 * @drv_err: value contained in ATA error register
817 * @sk: the sense key we'll fill out
818 * @asc: the additional sense code we'll fill out
819 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900820 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400821 *
822 * Converts an ATA error into a SCSI error. Fill out pointers to
823 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
824 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 *
826 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400827 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100829static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
830 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831{
Jeff Garzikb0955182005-05-12 15:45:22 -0400832 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100835 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 /* BBD|ECC|ID|MAR */
837 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
838 /* BBD|ECC|ID */
839 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
840 /* ECC|MC|MARK */
841 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
842 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
843 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
844 /* MC|ID|ABRT|TRK0|MARK */
845 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
846 /* MCR|MARK */
847 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
848 /* Bad address mark */
849 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
850 /* TRK0 */
851 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
852 /* Abort & !ICRC */
853 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
854 /* Media change request */
855 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
856 /* SRV */
857 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
858 /* Media change */
859 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
860 /* ECC */
861 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
862 /* BBD - block marked bad */
863 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
864 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
865 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100866 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 /* Must be first because BUSY means no other bits valid */
868 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
869 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
870 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
871 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
872 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
873 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 /*
876 * Is this an error we can process/parse
877 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400878 if (drv_stat & ATA_BUSY) {
879 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Jeff Garzikb0955182005-05-12 15:45:22 -0400882 if (drv_err) {
883 /* Look for drv_err */
884 for (i = 0; sense_table[i][0] != 0xFF; i++) {
885 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500886 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400887 sense_table[i][0]) {
888 *sk = sense_table[i][1];
889 *asc = sense_table[i][2];
890 *ascq = sense_table[i][3];
891 goto translate_done;
892 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400894 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900895 if (verbose)
896 printk(KERN_WARNING "ata%u: no sense translation for "
897 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 }
899
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400901 for (i = 0; stat_table[i][0] != 0xFF; i++) {
902 if (stat_table[i][0] & drv_stat) {
903 *sk = stat_table[i][1];
904 *asc = stat_table[i][2];
905 *ascq = stat_table[i][3];
906 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400909 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900910 if (verbose)
911 printk(KERN_WARNING "ata%u: no sense translation for "
912 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Alan Cox2d202022006-03-21 15:53:46 +0000914 /* We need a sensible error return here, which is tricky, and one
915 that won't cause people to do things like return a disk wrongly */
916 *sk = ABORTED_COMMAND;
917 *asc = 0x00;
918 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400919
920 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900921 if (verbose)
922 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
923 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
924 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400925 return;
926}
927
928/*
Tejun Heo750426a2006-11-14 22:37:35 +0900929 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400930 * @qc: Command that completed.
931 *
932 * This function is specific to the ATA descriptor format sense
933 * block specified for the ATA pass through commands. Regardless
934 * of whether the command errored or not, return a sense
935 * block. Copy all controller registers into the sense
936 * block. Clear sense key, ASC & ASCQ if there is no error.
937 *
938 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900939 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400940 */
Tejun Heo750426a2006-11-14 22:37:35 +0900941static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400942{
943 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900944 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400945 unsigned char *sb = cmd->sense_buffer;
946 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900947 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400948
949 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
950
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400951 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400952
953 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400954 * Use ata_to_sense_error() to map status register bits
955 * onto sense key, asc & ascq.
956 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900957 if (qc->err_mask ||
958 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900959 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900960 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400961 sb[1] &= 0x0f;
962 }
963
964 /*
965 * Sense data is current and format is descriptor.
966 */
967 sb[0] = 0x72;
968
969 desc[0] = 0x09;
970
Tejun Heof38621b2006-11-14 22:37:35 +0900971 /* set length of additional sense data */
972 sb[7] = 14;
973 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400974
975 /*
976 * Copy registers into sense buffer.
977 */
978 desc[2] = 0x00;
979 desc[3] = tf->feature; /* == error reg */
980 desc[5] = tf->nsect;
981 desc[7] = tf->lbal;
982 desc[9] = tf->lbam;
983 desc[11] = tf->lbah;
984 desc[12] = tf->device;
985 desc[13] = tf->command; /* == status reg */
986
987 /*
988 * Fill in Extend bit, and the high order bytes
989 * if applicable.
990 */
991 if (tf->flags & ATA_TFLAG_LBA48) {
992 desc[2] |= 0x01;
993 desc[4] = tf->hob_nsect;
994 desc[6] = tf->hob_lbal;
995 desc[8] = tf->hob_lbam;
996 desc[10] = tf->hob_lbah;
997 }
998}
999
1000/**
Tejun Heo750426a2006-11-14 22:37:35 +09001001 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -04001002 * @qc: Command that we are erroring out
1003 *
Tejun Heod25614b2006-11-14 22:37:35 +09001004 * Generate sense block for a failed ATA command @qc. Descriptor
1005 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -04001006 *
1007 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +09001008 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -04001009 */
Tejun Heo750426a2006-11-14 22:37:35 +09001010static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04001011{
Tejun Heod25614b2006-11-14 22:37:35 +09001012 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -04001013 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +09001014 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -04001015 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +09001016 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +09001017 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +09001018 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -04001019
1020 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1021
Jeff Garzik0e5dec42005-10-06 09:40:20 -04001022 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -04001023
Tejun Heod25614b2006-11-14 22:37:35 +09001024 /* sense data is current and format is descriptor */
1025 sb[0] = 0x72;
1026
1027 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -04001028 * onto sense key, asc & ascq.
1029 */
Tejun Heo058e55e2006-04-02 18:51:53 +09001030 if (qc->err_mask ||
1031 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +09001032 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +09001033 &sb[1], &sb[2], &sb[3], verbose);
1034 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -04001035 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
Tejun Heod25614b2006-11-14 22:37:35 +09001037 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -04001038
Tejun Heod25614b2006-11-14 22:37:35 +09001039 /* information sense data descriptor */
1040 sb[7] = 12;
1041 desc[0] = 0x00;
1042 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -05001043
Tejun Heod25614b2006-11-14 22:37:35 +09001044 desc[2] |= 0x80; /* valid */
1045 desc[6] = block >> 40;
1046 desc[7] = block >> 32;
1047 desc[8] = block >> 24;
1048 desc[9] = block >> 16;
1049 desc[10] = block >> 8;
1050 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051}
1052
Brian Kinga6cce2a2006-03-17 17:04:15 -06001053static void ata_scsi_sdev_config(struct scsi_device *sdev)
1054{
1055 sdev->use_10_for_rw = 1;
1056 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001057
1058 /* Schedule policy is determined by ->qc_defer() callback and
1059 * it needs to see every deferred qc. Set dev_blocked to 1 to
1060 * prevent SCSI midlayer from automatically deferring
1061 * requests.
1062 */
1063 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001064}
1065
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001066/**
1067 * atapi_drain_needed - Check whether data transfer may overflow
Randy Dunlap73fd8b62008-02-19 13:43:21 -08001068 * @rq: request to be checked
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001069 *
1070 * ATAPI commands which transfer variable length data to host
1071 * might overflow due to application error or hardare bug. This
1072 * function checks whether overflow should be drained and ignored
1073 * for @request.
1074 *
1075 * LOCKING:
1076 * None.
1077 *
1078 * RETURNS:
1079 * 1 if ; otherwise, 0.
1080 */
1081static int atapi_drain_needed(struct request *rq)
1082{
Christoph Hellwig33659eb2010-08-07 18:17:56 +02001083 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001084 return 0;
1085
Christoph Hellwig7b6d91d2010-08-07 18:20:39 +02001086 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001087 return 0;
1088
1089 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1090}
1091
1092static int ata_scsi_dev_config(struct scsi_device *sdev,
1093 struct ata_device *dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -06001094{
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02001095 if (!ata_id_has_unload(dev->id))
1096 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1097
Tejun Heo914ed352006-11-01 18:39:55 +09001098 /* configure max sectors */
Martin K. Petersen086fa5f2010-02-26 00:20:38 -05001099 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -06001100
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001101 if (dev->class == ATA_DEV_ATAPI) {
1102 struct request_queue *q = sdev->request_queue;
1103 void *buf;
1104
Tejun Heoe3790c72008-03-04 11:18:17 +01001105 /* set the min alignment and padding */
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001106 blk_queue_update_dma_alignment(sdev->request_queue,
1107 ATA_DMA_PAD_SZ - 1);
FUJITA Tomonori27f82212008-07-04 09:30:03 +02001108 blk_queue_update_dma_pad(sdev->request_queue,
1109 ATA_DMA_PAD_SZ - 1);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001110
1111 /* configure draining */
1112 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1113 if (!buf) {
1114 ata_dev_printk(dev, KERN_ERR,
1115 "drain buffer allocation failed\n");
1116 return -ENOMEM;
1117 }
1118
1119 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1120 } else {
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001121 /* ATA devices must be sector aligned */
Grant Grundler295124d2010-08-17 10:56:53 -07001122 sdev->sector_size = ata_id_logical_sector_size(dev->id);
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001123 blk_queue_update_dma_alignment(sdev->request_queue,
Grant Grundler295124d2010-08-17 10:56:53 -07001124 sdev->sector_size - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +09001125 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +01001126 }
Tejun Heod8cf5382008-01-15 08:46:59 +09001127
Jeff Garzikf26792d2007-10-29 17:18:39 -04001128 if (dev->flags & ATA_DFLAG_AN)
1129 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1130
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001131 if (dev->flags & ATA_DFLAG_NCQ) {
1132 int depth;
1133
1134 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1135 depth = min(ATA_MAX_QUEUE - 1, depth);
Tejun Heo8a8bc222008-11-10 14:48:21 +09001136 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001137 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001138
Grant Grundler295124d2010-08-17 10:56:53 -07001139 dev->sdev = sdev;
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001140 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001141}
1142
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143/**
1144 * ata_scsi_slave_config - Set SCSI device attributes
1145 * @sdev: SCSI device to examine
1146 *
1147 * This is called before we actually start reading
1148 * and writing to the device, to configure certain
1149 * SCSI mid-layer behaviors.
1150 *
1151 * LOCKING:
1152 * Defined by SCSI layer. We don't really care.
1153 */
1154
1155int ata_scsi_slave_config(struct scsi_device *sdev)
1156{
Tejun Heo31534362006-05-31 18:27:36 +09001157 struct ata_port *ap = ata_shost_to_port(sdev->host);
1158 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001159 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +09001160
Brian Kinga6cce2a2006-03-17 17:04:15 -06001161 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
Tejun Heo31534362006-05-31 18:27:36 +09001163 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001164 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001166 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167}
1168
1169/**
Tejun Heo83c47bc2006-05-31 18:28:07 +09001170 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1171 * @sdev: SCSI device to be destroyed
1172 *
1173 * @sdev is about to be destroyed for hot/warm unplugging. If
1174 * this unplugging was initiated by libata as indicated by NULL
1175 * dev->sdev, this function doesn't have to do anything.
1176 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1177 * Clear dev->sdev, schedule the device for ATA detach and invoke
1178 * EH.
1179 *
1180 * LOCKING:
1181 * Defined by SCSI layer. We don't really care.
1182 */
1183void ata_scsi_slave_destroy(struct scsi_device *sdev)
1184{
1185 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001186 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001187 unsigned long flags;
1188 struct ata_device *dev;
1189
1190 if (!ap->ops->error_handler)
1191 return;
1192
Jeff Garzikba6a1302006-06-22 23:46:10 -04001193 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09001194 dev = __ata_scsi_find_dev(ap, sdev);
1195 if (dev && dev->sdev) {
1196 /* SCSI device already in CANCEL state, no need to offline it */
1197 dev->sdev = NULL;
1198 dev->flags |= ATA_DFLAG_DETACH;
1199 ata_port_schedule_eh(ap);
1200 }
Jeff Garzikba6a1302006-06-22 23:46:10 -04001201 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001202
1203 kfree(q->dma_drain_buffer);
1204 q->dma_drain_buffer = NULL;
1205 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001206}
1207
1208/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001209 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1210 * @sdev: SCSI device to configure queue depth for
1211 * @queue_depth: new queue depth
Mike Christiee881a172009-10-15 17:46:39 -07001212 * @reason: calling context
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001213 *
1214 * This is libata standard hostt->change_queue_depth callback.
1215 * SCSI will call into this callback when user tries to set queue
1216 * depth via sysfs.
1217 *
1218 * LOCKING:
1219 * SCSI layer (we don't care)
1220 *
1221 * RETURNS:
1222 * Newly configured queue depth.
1223 */
Mike Christiee881a172009-10-15 17:46:39 -07001224int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1225 int reason)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001226{
1227 struct ata_port *ap = ata_shost_to_port(sdev->host);
1228 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001229 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001230
Mike Christiee881a172009-10-15 17:46:39 -07001231 if (reason != SCSI_QDEPTH_DEFAULT)
1232 return -EOPNOTSUPP;
1233
Tejun Heoc3c70c42007-02-20 23:31:22 +09001234 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001235 return sdev->queue_depth;
1236
1237 dev = ata_scsi_find_dev(ap, sdev);
1238 if (!dev || !ata_dev_enabled(dev))
1239 return sdev->queue_depth;
1240
Tejun Heoc3c70c42007-02-20 23:31:22 +09001241 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001242 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001243 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1244 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001245 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001246 queue_depth = 1;
1247 }
Tejun Heo360f6542006-09-30 19:45:00 +09001248 spin_unlock_irqrestore(ap->lock, flags);
1249
Tejun Heoc3c70c42007-02-20 23:31:22 +09001250 /* limit and apply queue depth */
1251 queue_depth = min(queue_depth, sdev->host->can_queue);
1252 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1253 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1254
1255 if (sdev->queue_depth == queue_depth)
1256 return -EINVAL;
1257
1258 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001259 return queue_depth;
1260}
1261
1262/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001263 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1264 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001265 *
1266 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1267 * (to start). Perhaps these commands should be preceded by
1268 * CHECK POWER MODE to see what power mode the device is already in.
1269 * [See SAT revision 5 at www.t10.org]
1270 *
1271 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001272 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001273 *
1274 * RETURNS:
1275 * Zero on success, non-zero on error.
1276 */
Tejun Heoad706992006-12-17 10:45:57 +09001277static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001278{
Tejun Heo542b1442006-12-17 10:45:08 +09001279 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001280 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001281 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001282
Tejun Heo2e5704f2006-12-17 10:46:33 +09001283 if (scmd->cmd_len < 5)
1284 goto invalid_fld;
1285
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001286 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1287 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001288 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001289 ; /* ignore IMMED bit, violates sat-r05 */
1290 }
Tejun Heo542b1442006-12-17 10:45:08 +09001291 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001292 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001293 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001294 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e85312007-09-23 13:14:13 +09001295
Tejun Heo542b1442006-12-17 10:45:08 +09001296 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001297 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001298
1299 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001300 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001301
1302 tf->lbah = 0x0;
1303 tf->lbam = 0x0;
1304 tf->lbal = 0x0;
1305 tf->device |= ATA_LBA;
1306 } else {
1307 /* CHS */
1308 tf->lbal = 0x1; /* sect */
1309 tf->lbam = 0x0; /* cyl low */
1310 tf->lbah = 0x0; /* cyl high */
1311 }
1312
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001313 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001314 } else {
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001315 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1316 * or S5) causing some drives to spin up and down again.
1317 */
1318 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1319 system_state == SYSTEM_POWER_OFF)
1320 goto skip;
1321
1322 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1323 system_entering_hibernation())
1324 goto skip;
1325
Robert Hancock78981a72007-01-30 00:59:18 -08001326 /* Issue ATA STANDBY IMMEDIATE command */
1327 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001328 }
Robert Hancock78981a72007-01-30 00:59:18 -08001329
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001330 /*
1331 * Standby and Idle condition timers could be implemented but that
1332 * would require libata to implement the Power condition mode page
1333 * and allow the user to change it. Changing mode pages requires
1334 * MODE SELECT to be implemented.
1335 */
1336
1337 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001338
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001339 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001340 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001341 /* "Invalid field in cbd" */
1342 return 1;
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001343 skip:
1344 scmd->result = SAM_STAT_GOOD;
1345 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001346}
1347
1348
1349/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1351 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 *
1353 * Sets up an ATA taskfile to issue FLUSH CACHE or
1354 * FLUSH CACHE EXT.
1355 *
1356 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001357 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 *
1359 * RETURNS:
1360 * Zero on success, non-zero on error.
1361 */
Tejun Heoad706992006-12-17 10:45:57 +09001362static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363{
1364 struct ata_taskfile *tf = &qc->tf;
1365
1366 tf->flags |= ATA_TFLAG_DEVICE;
1367 tf->protocol = ATA_PROT_NODATA;
1368
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001369 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 tf->command = ATA_CMD_FLUSH_EXT;
1371 else
1372 tf->command = ATA_CMD_FLUSH;
1373
Tejun Heob666da32007-10-26 15:53:59 +09001374 /* flush is critical for IO integrity, consider it an IO command */
1375 qc->flags |= ATA_QCFLAG_IO;
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 return 0;
1378}
1379
1380/**
Albert Lee3aef5232005-10-04 08:47:43 -04001381 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001382 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001383 *
1384 * Calculate LBA and transfer length for 6-byte commands.
1385 *
1386 * RETURNS:
1387 * @plba: the LBA
1388 * @plen: the transfer length
1389 */
Tejun Heo542b1442006-12-17 10:45:08 +09001390static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001391{
1392 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001393 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001394
1395 VPRINTK("six-byte command\n");
1396
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001397 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001398 lba |= ((u64)cdb[2]) << 8;
1399 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001400
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001401 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001402
1403 *plba = lba;
1404 *plen = len;
1405}
1406
1407/**
1408 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001409 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001410 *
1411 * Calculate LBA and transfer length for 10-byte commands.
1412 *
1413 * RETURNS:
1414 * @plba: the LBA
1415 * @plen: the transfer length
1416 */
Tejun Heo542b1442006-12-17 10:45:08 +09001417static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001418{
1419 u64 lba = 0;
1420 u32 len = 0;
1421
1422 VPRINTK("ten-byte command\n");
1423
Tejun Heo542b1442006-12-17 10:45:08 +09001424 lba |= ((u64)cdb[2]) << 24;
1425 lba |= ((u64)cdb[3]) << 16;
1426 lba |= ((u64)cdb[4]) << 8;
1427 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001428
Tejun Heo542b1442006-12-17 10:45:08 +09001429 len |= ((u32)cdb[7]) << 8;
1430 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001431
1432 *plba = lba;
1433 *plen = len;
1434}
1435
1436/**
1437 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001438 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001439 *
1440 * Calculate LBA and transfer length for 16-byte commands.
1441 *
1442 * RETURNS:
1443 * @plba: the LBA
1444 * @plen: the transfer length
1445 */
Tejun Heo542b1442006-12-17 10:45:08 +09001446static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001447{
1448 u64 lba = 0;
1449 u32 len = 0;
1450
1451 VPRINTK("sixteen-byte command\n");
1452
Tejun Heo542b1442006-12-17 10:45:08 +09001453 lba |= ((u64)cdb[2]) << 56;
1454 lba |= ((u64)cdb[3]) << 48;
1455 lba |= ((u64)cdb[4]) << 40;
1456 lba |= ((u64)cdb[5]) << 32;
1457 lba |= ((u64)cdb[6]) << 24;
1458 lba |= ((u64)cdb[7]) << 16;
1459 lba |= ((u64)cdb[8]) << 8;
1460 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001461
Tejun Heo542b1442006-12-17 10:45:08 +09001462 len |= ((u32)cdb[10]) << 24;
1463 len |= ((u32)cdb[11]) << 16;
1464 len |= ((u32)cdb[12]) << 8;
1465 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001466
1467 *plba = lba;
1468 *plen = len;
1469}
1470
1471/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1473 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 *
1475 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1476 *
1477 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001478 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 *
1480 * RETURNS:
1481 * Zero on success, non-zero on error.
1482 */
Tejun Heoad706992006-12-17 10:45:57 +09001483static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484{
Tejun Heo542b1442006-12-17 10:45:08 +09001485 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001487 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001489 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001490 u64 block;
1491 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
1493 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1494 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495
Tejun Heo2e5704f2006-12-17 10:46:33 +09001496 if (cdb[0] == VERIFY) {
1497 if (scmd->cmd_len < 10)
1498 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001499 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001500 } else if (cdb[0] == VERIFY_16) {
1501 if (scmd->cmd_len < 16)
1502 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001503 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001504 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001505 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506
Albert Lee8bf62ece2005-05-12 15:29:42 -04001507 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001508 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001509 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001510 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001511 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001512 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513
Albert Lee07506692005-10-12 15:04:18 +08001514 if (dev->flags & ATA_DFLAG_LBA) {
1515 tf->flags |= ATA_TFLAG_LBA;
1516
Albert Leec6a33e22005-10-12 15:12:26 +08001517 if (lba_28_ok(block, n_block)) {
1518 /* use LBA28 */
1519 tf->command = ATA_CMD_VERIFY;
1520 tf->device |= (block >> 24) & 0xf;
1521 } else if (lba_48_ok(block, n_block)) {
1522 if (!(dev->flags & ATA_DFLAG_LBA48))
1523 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001524
1525 /* use LBA48 */
1526 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001527 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528
Albert Lee8bf62ece2005-05-12 15:29:42 -04001529 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
Albert Lee8bf62ece2005-05-12 15:29:42 -04001531 tf->hob_lbah = (block >> 40) & 0xff;
1532 tf->hob_lbam = (block >> 32) & 0xff;
1533 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001534 } else
1535 /* request too large even for LBA48 */
1536 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001537
1538 tf->nsect = n_block & 0xff;
1539
1540 tf->lbah = (block >> 16) & 0xff;
1541 tf->lbam = (block >> 8) & 0xff;
1542 tf->lbal = block & 0xff;
1543
1544 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001546 /* CHS */
1547 u32 sect, head, cyl, track;
1548
Albert Leec6a33e22005-10-12 15:12:26 +08001549 if (!lba_28_ok(block, n_block))
1550 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001551
Albert Lee8bf62ece2005-05-12 15:29:42 -04001552 /* Convert LBA to CHS */
1553 track = (u32)block / dev->sectors;
1554 cyl = track / dev->heads;
1555 head = track % dev->heads;
1556 sect = (u32)block % dev->sectors + 1;
1557
Albert Leec187c4b2005-10-04 08:46:51 -04001558 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1559 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001560
1561 /* Check whether the converted CHS can fit.
1562 Cylinder: 0-65535
Albert Lee8bf62ece2005-05-12 15:29:42 -04001563 Head: 0-15
1564 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001565 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001566 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001567
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001569 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1570 tf->lbal = sect;
1571 tf->lbam = cyl;
1572 tf->lbah = cyl >> 8;
1573 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 }
1575
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001577
1578invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001579 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001580 /* "Invalid field in cbd" */
1581 return 1;
1582
1583out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001584 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001585 /* "Logical Block Address out of range" */
1586 return 1;
1587
1588nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001589 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001590 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591}
1592
1593/**
1594 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1595 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 *
1597 * Converts any of six SCSI read/write commands into the
1598 * ATA counterpart, including starting sector (LBA),
1599 * sector count, and taking into account the device's LBA48
1600 * support.
1601 *
1602 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1603 * %WRITE_16 are currently supported.
1604 *
1605 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001606 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 *
1608 * RETURNS:
1609 * Zero on success, non-zero on error.
1610 */
Tejun Heoad706992006-12-17 10:45:57 +09001611static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612{
Tejun Heo542b1442006-12-17 10:45:08 +09001613 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001614 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001615 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001616 u64 block;
1617 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001618 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
Tejun Heo542b1442006-12-17 10:45:08 +09001620 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001621 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001623 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001624 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001625 case READ_10:
1626 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001627 if (unlikely(scmd->cmd_len < 10))
1628 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001629 scsi_10_lba_len(cdb, &block, &n_block);
1630 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001631 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001632 break;
1633 case READ_6:
1634 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001635 if (unlikely(scmd->cmd_len < 6))
1636 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001637 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001638
1639 /* for 6-byte r/w commands, transfer length 0
1640 * means 256 blocks of data, not 0 block.
1641 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001642 if (!n_block)
1643 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001644 break;
1645 case READ_16:
1646 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001647 if (unlikely(scmd->cmd_len < 16))
1648 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001649 scsi_16_lba_len(cdb, &block, &n_block);
1650 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001651 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001652 break;
1653 default:
Albert Lee8bf62ece2005-05-12 15:29:42 -04001654 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001655 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 }
1657
Albert Lee8bf62ece2005-05-12 15:29:42 -04001658 /* Check and compose ATA command */
1659 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001660 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1661 * length 0 means transfer 0 block of data.
1662 * However, for ATA R/W commands, sector count 0 means
1663 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001664 *
1665 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001666 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001667 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001668
Tejun Heobd056d72006-11-14 22:47:10 +09001669 qc->flags |= ATA_QCFLAG_IO;
Grant Grundler295124d2010-08-17 10:56:53 -07001670 qc->nbytes = n_block * scmd->device->sector_size;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001671
Tejun Heobd056d72006-11-14 22:47:10 +09001672 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1673 qc->tag);
1674 if (likely(rc == 0))
1675 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001676
Tejun Heobd056d72006-11-14 22:47:10 +09001677 if (rc == -ERANGE)
1678 goto out_of_range;
1679 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001680invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001681 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001682 /* "Invalid field in cbd" */
1683 return 1;
1684
1685out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001686 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001687 /* "Logical Block Address out of range" */
1688 return 1;
1689
1690nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001691 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001692 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693}
1694
Tejun Heo77853bf2006-01-23 13:09:36 +09001695static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696{
Tejun Heoc31f5712006-11-22 12:39:43 +09001697 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001699 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001700 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701
Jeff Garzikb0955182005-05-12 15:45:22 -04001702 /* For ATA pass thru (SAT) commands, generate a sense block if
1703 * user mandated it or if there's an error. Note that if we
1704 * generate because the user forced us to, a check condition
1705 * is generated and the ATA register values are returned
1706 * whether the command completed successfully or not. If there
1707 * was no error, SK, ASC and ASCQ will all be zero.
1708 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001709 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001710 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001711 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001712 } else {
1713 if (!need_sense) {
1714 cmd->result = SAM_STAT_GOOD;
1715 } else {
1716 /* TODO: decide which descriptor format to use
1717 * for 48b LBA devices and call that here
1718 * instead of the fixed desc, which is only
1719 * good for smaller LBA (and maybe CHS?)
1720 * devices.
1721 */
Tejun Heo750426a2006-11-14 22:37:35 +09001722 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001723 }
1724 }
1725
Tejun Heoc31f5712006-11-22 12:39:43 +09001726 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001727 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
1729 qc->scsidone(cmd);
1730
Tejun Heo77853bf2006-01-23 13:09:36 +09001731 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732}
1733
1734/**
1735 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 * @dev: ATA device to which the command is addressed
1737 * @cmd: SCSI command to execute
1738 * @done: SCSI command completion function
1739 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1740 *
1741 * Our ->queuecommand() function has decided that the SCSI
1742 * command issued can be directly translated into an ATA
1743 * command, rather than handled internally.
1744 *
1745 * This function sets up an ata_queued_cmd structure for the
1746 * SCSI command, and sends that ata_queued_cmd to the hardware.
1747 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001748 * The xlat_func argument (actor) returns 0 if ready to execute
1749 * ATA command, else 1 to finish translation. If 1 is returned
1750 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1751 * to be set reflecting an error condition or clean (early)
1752 * termination.
1753 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001755 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001756 *
1757 * RETURNS:
1758 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1759 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001761static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1762 void (*done)(struct scsi_cmnd *),
1763 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001765 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001767 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768
1769 VPRINTK("ENTER\n");
1770
Tejun Heo3373efd2006-05-15 20:57:53 +09001771 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001773 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774
1775 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001776 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1777 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001778 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001779 ata_dev_printk(dev, KERN_WARNING,
1780 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001781 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 }
1783
Boaz Harrosh71201652007-09-18 17:48:50 +02001784 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785
1786 qc->dma_dir = cmd->sc_data_direction;
1787 }
1788
1789 qc->complete_fn = ata_scsi_qc_complete;
1790
Tejun Heoad706992006-12-17 10:45:57 +09001791 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001792 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793
Tejun Heo31cc23b2007-09-23 13:14:12 +09001794 if (ap->ops->qc_defer) {
1795 if ((rc = ap->ops->qc_defer(qc)))
1796 goto defer;
1797 }
1798
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001800 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801
1802 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001803 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804
Douglas Gilbertae006512005-10-09 09:09:35 -04001805early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001806 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001807 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001808 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001809 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001810
1811err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001813 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001814 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001815err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001816 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001817 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001818
1819defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001820 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001821 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001822 if (rc == ATA_DEFER_LINK)
1823 return SCSI_MLQUEUE_DEVICE_BUSY;
1824 else
1825 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826}
1827
1828/**
1829 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001830 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001831 * @flags: unsigned long variable to store irq enable status
1832 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 *
Tejun Heo87340e92008-04-28 17:48:51 +09001834 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 *
1836 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001837 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 *
1839 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001840 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 */
Tejun Heo87340e92008-04-28 17:48:51 +09001842static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1843 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844{
Tejun Heo87340e92008-04-28 17:48:51 +09001845 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846
Tejun Heo87340e92008-04-28 17:48:51 +09001847 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1848 if (copy_in)
1849 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1850 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1851 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852}
1853
1854/**
1855 * ata_scsi_rbuf_put - Unmap response buffer.
1856 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001857 * @copy_out: copy out result
1858 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 *
Tejun Heo87340e92008-04-28 17:48:51 +09001860 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1861 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862 *
1863 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001864 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 */
Tejun Heo87340e92008-04-28 17:48:51 +09001866static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1867 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868{
Tejun Heo87340e92008-04-28 17:48:51 +09001869 if (copy_out)
1870 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1871 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1872 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873}
1874
1875/**
1876 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1877 * @args: device IDENTIFY data / SCSI command of interest.
1878 * @actor: Callback hook for desired SCSI command simulator
1879 *
1880 * Takes care of the hard work of simulating a SCSI command...
1881 * Mapping the response buffer, calling the command's handler,
1882 * and handling the handler's return value. This return value
1883 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001884 * completed successfully (0), or not (in which case cmd->result
1885 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 *
1887 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001888 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 */
Tejun Heof0761be2008-04-28 17:16:52 +09001890static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001891 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892{
1893 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001894 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001896 unsigned long flags;
1897
Tejun Heo87340e92008-04-28 17:48:51 +09001898 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1899 rc = actor(args, rbuf);
1900 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001901
Douglas Gilbertae006512005-10-09 09:09:35 -04001902 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001904 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905}
1906
1907/**
1908 * ata_scsiop_inq_std - Simulate INQUIRY command
1909 * @args: device IDENTIFY data / SCSI command of interest.
1910 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 *
1912 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001913 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 *
1915 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001916 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 */
Tejun Heo87340e92008-04-28 17:48:51 +09001918static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919{
Tejun Heo87340e92008-04-28 17:48:51 +09001920 const u8 versions[] = {
1921 0x60, /* SAM-3 (no version claimed) */
1922
1923 0x03,
1924 0x20, /* SBC-2 (no version claimed) */
1925
1926 0x02,
1927 0x60 /* SPC-3 (no version claimed) */
1928 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 u8 hdr[] = {
1930 TYPE_DISK,
1931 0,
1932 0x5, /* claim SPC-3 version compatibility */
1933 2,
1934 95 - 4
1935 };
1936
Tejun Heo87340e92008-04-28 17:48:51 +09001937 VPRINTK("ENTER\n");
1938
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 /* set scsi removeable (RMB) bit per ata bit */
1940 if (ata_id_removeable(args->id))
1941 hdr[1] |= (1 << 7);
1942
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001944 memcpy(&rbuf[8], "ATA ", 8);
1945 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1946 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947
Tejun Heo87340e92008-04-28 17:48:51 +09001948 if (rbuf[32] == 0 || rbuf[32] == ' ')
1949 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950
Tejun Heo87340e92008-04-28 17:48:51 +09001951 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952
1953 return 0;
1954}
1955
1956/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001957 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958 * @args: device IDENTIFY data / SCSI command of interest.
1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001961 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 *
1963 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001964 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 */
Tejun Heo87340e92008-04-28 17:48:51 +09001966static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967{
1968 const u8 pages[] = {
1969 0x00, /* page 0x00, this page */
1970 0x80, /* page 0x80, unit serial no page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001971 0x83, /* page 0x83, device ident page */
1972 0x89, /* page 0x89, ata info page */
Christoph Hellwig18f0f972009-11-17 10:00:47 -05001973 0xb0, /* page 0xb0, block limits page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001974 0xb1, /* page 0xb1, block device characteristics page */
Martin K. Petersen02e0a602010-09-10 01:23:18 -04001975 0xb2, /* page 0xb2, thin provisioning page */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 };
Tejun Heo87340e92008-04-28 17:48:51 +09001977
Jeff Garzikb142eb62006-03-21 20:37:47 -05001978 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09001979 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 return 0;
1981}
1982
1983/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001984 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 * @args: device IDENTIFY data / SCSI command of interest.
1986 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 *
1988 * Returns ATA device serial number.
1989 *
1990 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001991 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 */
Tejun Heo87340e92008-04-28 17:48:51 +09001993static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994{
1995 const u8 hdr[] = {
1996 0,
1997 0x80, /* this page code */
1998 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001999 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 };
Tejun Heo87340e92008-04-28 17:48:51 +09002001
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09002003 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2004 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 return 0;
2006}
2007
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002009 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07002010 * @args: device IDENTIFY data / SCSI command of interest.
2011 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05002013 * Yields two logical unit device identification designators:
2014 * - vendor specific ASCII containing the ATA serial number
2015 * - SAT defined "t10 vendor id based" containing ASCII vendor
2016 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 *
2018 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002019 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 */
Tejun Heo87340e92008-04-28 17:48:51 +09002021static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022{
Jeff Garzikb142eb62006-03-21 20:37:47 -05002023 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09002024 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05002025
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05002027 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028
Tejun Heo87340e92008-04-28 17:48:51 +09002029 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2030 rbuf[num + 0] = 2;
2031 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2032 num += 4;
2033 ata_id_string(args->id, (unsigned char *) rbuf + num,
2034 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2035 num += ATA_ID_SERNO_LEN;
2036
2037 /* SAT defined lu model and serial numbers descriptor */
2038 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2039 rbuf[num + 0] = 2;
2040 rbuf[num + 1] = 1;
2041 rbuf[num + 3] = sat_model_serial_desc_len;
2042 num += 4;
2043 memcpy(rbuf + num, "ATA ", 8);
2044 num += 8;
2045 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2046 ATA_ID_PROD_LEN);
2047 num += ATA_ID_PROD_LEN;
2048 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2049 ATA_ID_SERNO_LEN);
2050 num += ATA_ID_SERNO_LEN;
2051
Jeff Garzikb142eb62006-03-21 20:37:47 -05002052 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053 return 0;
2054}
2055
2056/**
Jeff Garzikad355b42007-09-21 20:38:03 -04002057 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2058 * @args: device IDENTIFY data / SCSI command of interest.
2059 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04002060 *
2061 * Yields SAT-specified ATA VPD page.
2062 *
2063 * LOCKING:
2064 * spin_lock_irqsave(host lock)
2065 */
Tejun Heo87340e92008-04-28 17:48:51 +09002066static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04002067{
Jeff Garzikad355b42007-09-21 20:38:03 -04002068 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04002069
Jeff Garzikad355b42007-09-21 20:38:03 -04002070 memset(&tf, 0, sizeof(tf));
2071
Tejun Heo87340e92008-04-28 17:48:51 +09002072 rbuf[1] = 0x89; /* our page code */
2073 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2074 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04002075
Tejun Heo87340e92008-04-28 17:48:51 +09002076 memcpy(&rbuf[8], "linux ", 8);
2077 memcpy(&rbuf[16], "libata ", 16);
2078 memcpy(&rbuf[32], DRV_VERSION, 4);
2079 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04002080
2081 /* we don't store the ATA device signature, so we fake it */
2082
2083 tf.command = ATA_DRDY; /* really, this is Status reg */
2084 tf.lbal = 0x1;
2085 tf.nsect = 0x1;
2086
Tejun Heo87340e92008-04-28 17:48:51 +09002087 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2088 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04002089
Tejun Heo87340e92008-04-28 17:48:51 +09002090 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04002091
Tejun Heo87340e92008-04-28 17:48:51 +09002092 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04002093 return 0;
2094}
2095
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002096static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2097{
Grant Grundler295124d2010-08-17 10:56:53 -07002098 u16 min_io_sectors;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002099
2100 rbuf[1] = 0xb0;
2101 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2102
2103 /*
2104 * Optimal transfer length granularity.
2105 *
2106 * This is always one physical block, but for disks with a smaller
2107 * logical than physical sector size we need to figure out what the
2108 * latter is.
2109 */
Grant Grundler295124d2010-08-17 10:56:53 -07002110 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002111 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2112
2113 /*
2114 * Optimal unmap granularity.
2115 *
2116 * The ATA spec doesn't even know about a granularity or alignment
2117 * for the TRIM command. We can leave away most of the unmap related
2118 * VPD page entries, but we have specifify a granularity to signal
2119 * that we support some form of unmap - in thise case via WRITE SAME
2120 * with the unmap bit set.
2121 */
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002122 if (ata_id_has_trim(args->id)) {
2123 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002124 put_unaligned_be32(1, &rbuf[28]);
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002125 }
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002126
2127 return 0;
2128}
2129
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002130static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2131{
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002132 int form_factor = ata_id_form_factor(args->id);
2133 int media_rotation_rate = ata_id_rotation_rate(args->id);
2134
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002135 rbuf[1] = 0xb1;
2136 rbuf[3] = 0x3c;
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002137 rbuf[4] = media_rotation_rate >> 8;
2138 rbuf[5] = media_rotation_rate;
2139 rbuf[7] = form_factor;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002140
2141 return 0;
2142}
2143
Martin K. Petersen02e0a602010-09-10 01:23:18 -04002144static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2145{
2146 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2147 rbuf[1] = 0xb2;
2148 rbuf[3] = 0x4;
2149 rbuf[5] = 1 << 6; /* TPWS */
2150
2151 return 0;
2152}
2153
Jeff Garzikad355b42007-09-21 20:38:03 -04002154/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002155 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 * @args: device IDENTIFY data / SCSI command of interest.
2157 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 *
2159 * No operation. Simply returns success to caller, to indicate
2160 * that the caller should successfully complete this SCSI command.
2161 *
2162 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002163 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 */
Tejun Heo87340e92008-04-28 17:48:51 +09002165static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166{
2167 VPRINTK("ENTER\n");
2168 return 0;
2169}
2170
2171/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 * ata_msense_caching - Simulate MODE SENSE caching info page
2173 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09002174 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 *
2176 * Generate a caching info page, which conditionally indicates
2177 * write caching to the SCSI layer, depending on device
2178 * capabilities.
2179 *
2180 * LOCKING:
2181 * None.
2182 */
Tejun Heo87340e92008-04-28 17:48:51 +09002183static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184{
Tejun Heo87340e92008-04-28 17:48:51 +09002185 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002187 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002189 buf[12] |= (1 << 5); /* disable read ahead */
2190 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191}
2192
2193/**
2194 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09002195 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 *
2197 * Generate a generic MODE SENSE control mode page.
2198 *
2199 * LOCKING:
2200 * None.
2201 */
Tejun Heo87340e92008-04-28 17:48:51 +09002202static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203{
Tejun Heo87340e92008-04-28 17:48:51 +09002204 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002205 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206}
2207
2208/**
2209 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07002210 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 *
2212 * Generate a generic MODE SENSE r/w error recovery page.
2213 *
2214 * LOCKING:
2215 * None.
2216 */
Tejun Heo87340e92008-04-28 17:48:51 +09002217static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218{
Tejun Heo87340e92008-04-28 17:48:51 +09002219 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002220 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221}
2222
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002223/*
2224 * We can turn this into a real blacklist if it's needed, for now just
2225 * blacklist any Maxtor BANC1G10 revision firmware
2226 */
2227static int ata_dev_supports_fua(u16 *id)
2228{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002229 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002230
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002231 if (!libata_fua)
2232 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002233 if (!ata_id_has_fua(id))
2234 return 0;
2235
Tejun Heoa0cf7332007-01-02 20:18:49 +09002236 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2237 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002238
Tejun Heo2e026712006-02-12 22:47:04 +09002239 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002240 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002241 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002242 return 1;
2243
2244 return 0; /* blacklisted */
2245}
2246
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247/**
2248 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2249 * @args: device IDENTIFY data / SCSI command of interest.
2250 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002252 * Simulate MODE SENSE commands. Assume this is invoked for direct
2253 * access devices (e.g. disks) only. There should be no block
2254 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255 *
2256 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002257 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 */
Tejun Heo87340e92008-04-28 17:48:51 +09002259static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002261 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002262 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002263 const u8 sat_blk_desc[] = {
2264 0, 0, 0, 0, /* number of blocks: sat unspecified */
2265 0,
2266 0, 0x2, 0x0 /* block length: 512 bytes */
2267 };
2268 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002269 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002270 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271
2272 VPRINTK("ENTER\n");
2273
2274 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002275 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2276 /*
2277 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002279
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002281 switch (page_control) {
2282 case 0: /* current */
2283 break; /* supported */
2284 case 3: /* saved */
2285 goto saving_not_supp;
2286 case 1: /* changeable */
2287 case 2: /* defaults */
2288 default:
2289 goto invalid_fld;
2290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291
Tejun Heo87340e92008-04-28 17:48:51 +09002292 if (six_byte)
2293 p += 4 + (ebd ? 8 : 0);
2294 else
2295 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002297 pg = scsicmd[2] & 0x3f;
2298 spg = scsicmd[3];
2299 /*
2300 * No mode subpages supported (yet) but asking for _all_
2301 * subpages may be valid
2302 */
2303 if (spg && (spg != ALL_SUB_MPAGES))
2304 goto invalid_fld;
2305
2306 switch(pg) {
2307 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002308 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309 break;
2310
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002311 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002312 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313 break;
2314
Tejun Heo87340e92008-04-28 17:48:51 +09002315 case CONTROL_MPAGE:
2316 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002319 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002320 p += ata_msense_rw_recovery(p);
2321 p += ata_msense_caching(args->id, p);
2322 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 break;
2324
2325 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002326 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 }
2328
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002329 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002330 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002331 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2332 dpofua = 1 << 4;
2333
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002335 rbuf[0] = p - rbuf - 1;
2336 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002337 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002338 rbuf[3] = sizeof(sat_blk_desc);
2339 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002340 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002342 unsigned int output_len = p - rbuf - 2;
2343
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002345 rbuf[1] = output_len;
2346 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002347 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002348 rbuf[7] = sizeof(sat_blk_desc);
2349 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002350 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002353
2354invalid_fld:
2355 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2356 /* "Invalid field in cbd" */
2357 return 1;
2358
2359saving_not_supp:
2360 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2361 /* "Saving parameters not supported" */
2362 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363}
2364
2365/**
2366 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2367 * @args: device IDENTIFY data / SCSI command of interest.
2368 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 *
2370 * Simulate READ CAPACITY commands.
2371 *
2372 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002373 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374 */
Tejun Heo87340e92008-04-28 17:48:51 +09002375static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376{
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002377 struct ata_device *dev = args->dev;
2378 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
Grant Grundler295124d2010-08-17 10:56:53 -07002379 u32 sector_size; /* physical sector size in bytes */
2380 u8 log2_per_phys;
2381 u16 lowest_aligned;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002382
Grant Grundler295124d2010-08-17 10:56:53 -07002383 sector_size = ata_id_logical_sector_size(dev->id);
2384 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2385 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386
2387 VPRINTK("ENTER\n");
2388
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002390 if (last_lba >= 0xffffffffULL)
2391 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002392
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002394 rbuf[0] = last_lba >> (8 * 3);
2395 rbuf[1] = last_lba >> (8 * 2);
2396 rbuf[2] = last_lba >> (8 * 1);
2397 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398
2399 /* sector size */
Grant Grundler295124d2010-08-17 10:56:53 -07002400 rbuf[4] = sector_size >> (8 * 3);
2401 rbuf[5] = sector_size >> (8 * 2);
2402 rbuf[6] = sector_size >> (8 * 1);
2403 rbuf[7] = sector_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 } else {
2405 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002406 rbuf[0] = last_lba >> (8 * 7);
2407 rbuf[1] = last_lba >> (8 * 6);
2408 rbuf[2] = last_lba >> (8 * 5);
2409 rbuf[3] = last_lba >> (8 * 4);
2410 rbuf[4] = last_lba >> (8 * 3);
2411 rbuf[5] = last_lba >> (8 * 2);
2412 rbuf[6] = last_lba >> (8 * 1);
2413 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414
2415 /* sector size */
Grant Grundler295124d2010-08-17 10:56:53 -07002416 rbuf[ 8] = sector_size >> (8 * 3);
2417 rbuf[ 9] = sector_size >> (8 * 2);
2418 rbuf[10] = sector_size >> (8 * 1);
2419 rbuf[11] = sector_size;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002420
2421 rbuf[12] = 0;
Grant Grundler295124d2010-08-17 10:56:53 -07002422 rbuf[13] = log2_per_phys;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002423 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2424 rbuf[15] = lowest_aligned;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002425
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002426 if (ata_id_has_trim(args->id)) {
2427 rbuf[14] |= 0x80; /* TPE */
2428
2429 if (ata_id_has_zero_after_trim(args->id))
2430 rbuf[14] |= 0x40; /* TPRZ */
2431 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 }
2433
2434 return 0;
2435}
2436
2437/**
2438 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2439 * @args: device IDENTIFY data / SCSI command of interest.
2440 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 *
2442 * Simulate REPORT LUNS command.
2443 *
2444 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002445 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446 */
Tejun Heo87340e92008-04-28 17:48:51 +09002447static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448{
2449 VPRINTK("ENTER\n");
2450 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2451
2452 return 0;
2453}
2454
Tejun Heo77853bf2006-01-23 13:09:36 +09002455static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002456{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002457 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002458 /* FIXME: not quite right; we don't want the
2459 * translation of taskfile registers into
2460 * a sense descriptors, since that's only
2461 * correct for ATA, not ATAPI
2462 */
Tejun Heo750426a2006-11-14 22:37:35 +09002463 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002464 }
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002465
2466 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002467 ata_qc_free(qc);
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002468}
2469
2470/* is it pointless to prefer PIO for "safety reasons"? */
2471static inline int ata_pio_use_silly(struct ata_port *ap)
2472{
2473 return (ap->flags & ATA_FLAG_PIO_DMA);
2474}
2475
2476static void atapi_request_sense(struct ata_queued_cmd *qc)
2477{
2478 struct ata_port *ap = qc->ap;
2479 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002480
2481 DPRINTK("ATAPI request sense\n");
2482
Jeff Garzika939c962005-10-05 17:09:16 -04002483 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002484 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002485
Tejun Heo127102a2008-04-07 22:47:21 +09002486#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002487 if (ap->ops->sff_tf_read)
2488 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002489#endif
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002490
2491 /* fill these in, for the case where they are -not- overwritten */
2492 cmd->sense_buffer[0] = 0x70;
2493 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2494
2495 ata_qc_reinit(qc);
2496
Tejun Heo93f8fec2007-12-05 16:43:01 +09002497 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002498 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002499 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002500 qc->dma_dir = DMA_FROM_DEVICE;
2501
Tejun Heo6e7846e2006-02-12 23:32:58 +09002502 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002503 qc->cdb[0] = REQUEST_SENSE;
2504 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2505
2506 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2507 qc->tf.command = ATA_CMD_PACKET;
2508
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002509 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002510 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002511 qc->tf.feature |= ATAPI_PKT_DMA;
2512 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002513 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002514 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2515 qc->tf.lbah = 0;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002516 }
Jeff Garzika939c962005-10-05 17:09:16 -04002517 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2518
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002519 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002520
Tejun Heo8e0e6942006-03-31 20:41:11 +09002521 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002522
2523 DPRINTK("EXIT\n");
2524}
2525
Tejun Heo77853bf2006-01-23 13:09:36 +09002526static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527{
2528 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002529 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530
Jeff Garzika7dac442005-10-30 04:44:42 -05002531 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002532
Tejun Heo246619d2006-05-15 20:58:16 +09002533 /* handle completion from new EH */
2534 if (unlikely(qc->ap->ops->error_handler &&
2535 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2536
2537 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2538 /* FIXME: not quite right; we don't want the
2539 * translation of taskfile registers into a
2540 * sense descriptors, since that's only
2541 * correct for ATA, not ATAPI
2542 */
Tejun Heo750426a2006-11-14 22:37:35 +09002543 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002544 }
2545
Tejun Heo22aac082006-08-08 14:08:59 +09002546 /* SCSI EH automatically locks door if sdev->locked is
2547 * set. Sometimes door lock request continues to
2548 * fail, for example, when no media is present. This
2549 * creates a loop - SCSI EH issues door lock which
2550 * fails and gets invoked again to acquire sense data
2551 * for the failed command.
2552 *
2553 * If door lock fails, always clear sdev->locked to
2554 * avoid this infinite loop.
2555 */
2556 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2557 qc->dev->sdev->locked = 0;
2558
Tejun Heo246619d2006-05-15 20:58:16 +09002559 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2560 qc->scsidone(cmd);
2561 ata_qc_free(qc);
2562 return;
2563 }
2564
2565 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002566 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002568 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002569 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002570 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002571 /* FIXME: not quite right; we don't want the
2572 * translation of taskfile registers into
2573 * a sense descriptors, since that's only
2574 * correct for ATA, not ATAPI
2575 */
Tejun Heo750426a2006-11-14 22:37:35 +09002576 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002577 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578 u8 *scsicmd = cmd->cmnd;
2579
Tony Battersbyfd71da42005-12-21 16:35:44 -05002580 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002581 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002582 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002583
Tejun Heo87340e92008-04-28 17:48:51 +09002584 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002585
2586 /* ATAPI devices typically report zero for their SCSI version,
2587 * and sometimes deviate from the spec WRT response data
2588 * format. If SCSI version is reported as zero like normal,
2589 * then we make the following fixups: 1) Fake MMC-5 version,
2590 * to indicate to the Linux scsi midlayer this is a modern
2591 * device. 2) Ensure response data format / ATAPI information
2592 * are always correct.
2593 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002594 if (buf[2] == 0) {
2595 buf[2] = 0x5;
2596 buf[3] = 0x32;
2597 }
2598
Tejun Heo87340e92008-04-28 17:48:51 +09002599 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002601
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602 cmd->result = SAM_STAT_GOOD;
2603 }
2604
2605 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002606 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607}
2608/**
2609 * atapi_xlat - Initialize PACKET taskfile
2610 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611 *
2612 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002613 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614 *
2615 * RETURNS:
2616 * Zero on success, non-zero on failure.
2617 */
Tejun Heoad706992006-12-17 10:45:57 +09002618static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619{
Tejun Heo542b1442006-12-17 10:45:08 +09002620 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002622 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002623 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002624 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625
Tejun Heo2e5704f2006-12-17 10:46:33 +09002626 memset(qc->cdb, 0, dev->cdb_len);
2627 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628
2629 qc->complete_fn = atapi_qc_complete;
2630
2631 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002632 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633 qc->tf.flags |= ATA_TFLAG_WRITE;
2634 DPRINTK("direction: write\n");
2635 }
2636
2637 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002638 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002639
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002640 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002641 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002642 using_pio = 1;
2643
Tejun Heoe1902222007-11-26 20:58:02 +09002644 /* Some controller variants snoop this value for Packet
2645 * transfers to do state machine and FIFO management. Thus we
2646 * want to set it properly, and for DMA where it is
2647 * effectively meaningless.
2648 */
Tejun Heoaacda372008-03-18 17:47:43 +09002649 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002650
Tejun Heoe1902222007-11-26 20:58:02 +09002651 /* Most ATAPI devices which honor transfer chunk size don't
2652 * behave according to the spec when odd chunk size which
2653 * matches the transfer length is specified. If the number of
2654 * bytes to transfer is 2n+1. According to the spec, what
2655 * should happen is to indicate that 2n+1 is going to be
2656 * transferred and transfer 2n+2 bytes where the last byte is
2657 * padding.
2658 *
2659 * In practice, this doesn't happen. ATAPI devices first
2660 * indicate and transfer 2n bytes and then indicate and
2661 * transfer 2 bytes where the last byte is padding.
2662 *
2663 * This inconsistency confuses several controllers which
2664 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2665 * These controllers use actual number of transferred bytes to
2666 * update DMA poitner and transfer of 4n+2 bytes make those
2667 * controller push DMA pointer by 4n+4 bytes because SATA data
2668 * FISes are aligned to 4 bytes. This causes data corruption
2669 * and buffer overrun.
2670 *
2671 * Always setting nbytes to even number solves this problem
2672 * because then ATAPI devices don't have to split data at 2n
2673 * boundaries.
2674 */
2675 if (nbytes & 0x1)
2676 nbytes++;
2677
Alan Cox2db78dd2007-10-02 13:53:04 -07002678 qc->tf.lbam = (nbytes & 0xFF);
2679 qc->tf.lbah = (nbytes >> 8);
2680
Tejun Heo5895ef92008-06-17 12:36:26 +09002681 if (nodata)
2682 qc->tf.protocol = ATAPI_PROT_NODATA;
2683 else if (using_pio)
2684 qc->tf.protocol = ATAPI_PROT_PIO;
2685 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002686 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002687 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 qc->tf.feature |= ATAPI_PKT_DMA;
2689
Tejun Heo91163002008-02-21 13:25:50 +09002690 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2691 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002692 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002693 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 }
2695
Alan Cox2db78dd2007-10-02 13:53:04 -07002696
2697 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2698 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699 return 0;
2700}
2701
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002702static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002703{
Tejun Heo071f44b2008-04-07 22:47:22 +09002704 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002705 if (likely(devno < ata_link_max_devices(&ap->link)))
2706 return &ap->link.device[devno];
2707 } else {
2708 if (likely(devno < ap->nr_pmp_links))
2709 return &ap->pmp_link[devno].device[0];
2710 }
2711
Tejun Heoab5b3a52006-05-31 18:27:34 +09002712 return NULL;
2713}
2714
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002715static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2716 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002717{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002718 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002719
Tejun Heo41bda9c2007-08-06 18:36:24 +09002720 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002721 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002722 if (unlikely(scsidev->channel || scsidev->lun))
2723 return NULL;
2724 devno = scsidev->id;
2725 } else {
2726 if (unlikely(scsidev->id || scsidev->lun))
2727 return NULL;
2728 devno = scsidev->channel;
2729 }
2730
2731 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002732}
2733
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734/**
2735 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2736 * @ap: ATA port to which the device is attached
2737 * @scsidev: SCSI device from which we derive the ATA device
2738 *
2739 * Given various information provided in struct scsi_cmnd,
2740 * map that onto an ATA bus, and using that mapping
2741 * determine which ata_device is associated with the
2742 * SCSI command to be sent.
2743 *
2744 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002745 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 *
2747 * RETURNS:
2748 * Associated ATA device, or %NULL if not found.
2749 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002751ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002753 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754
Tejun Heo2486fa52008-07-31 07:52:40 +09002755 if (unlikely(!dev || !ata_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002756 return NULL;
2757
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 return dev;
2759}
2760
Jeff Garzikb0955182005-05-12 15:45:22 -04002761/*
2762 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2763 * @byte1: Byte 1 from pass-thru CDB.
2764 *
2765 * RETURNS:
2766 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2767 */
2768static u8
2769ata_scsi_map_proto(u8 byte1)
2770{
2771 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002772 case 3: /* Non-data */
2773 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002774
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002775 case 6: /* DMA */
2776 case 10: /* UDMA Data-in */
2777 case 11: /* UDMA Data-Out */
2778 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002779
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002780 case 4: /* PIO Data-in */
2781 case 5: /* PIO Data-out */
2782 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002783
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002784 case 0: /* Hard Reset */
2785 case 1: /* SRST */
2786 case 8: /* Device Diagnostic */
2787 case 9: /* Device Reset */
2788 case 7: /* DMA Queued */
2789 case 12: /* FPDMA */
2790 case 15: /* Return Response Info */
2791 default: /* Reserved */
2792 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002793 }
2794
2795 return ATA_PROT_UNKNOWN;
2796}
2797
2798/**
2799 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2800 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002801 *
2802 * Handles either 12 or 16-byte versions of the CDB.
2803 *
2804 * RETURNS:
2805 * Zero on success, non-zero on failure.
2806 */
Tejun Heoad706992006-12-17 10:45:57 +09002807static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002808{
2809 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002810 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002811 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002812 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002813
Tejun Heo542b1442006-12-17 10:45:08 +09002814 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002815 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002816
Alan Coxae8d4ee2007-11-04 22:05:49 -05002817 /*
Jeff Garzikb0955182005-05-12 15:45:22 -04002818 * 12 and 16 byte CDBs use different offsets to
2819 * provide the various register values.
2820 */
Tejun Heo542b1442006-12-17 10:45:08 +09002821 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002822 /*
2823 * 16-byte CDB - may contain extended commands.
2824 *
2825 * If that is the case, copy the upper byte register values.
2826 */
Tejun Heo542b1442006-12-17 10:45:08 +09002827 if (cdb[1] & 0x01) {
2828 tf->hob_feature = cdb[3];
2829 tf->hob_nsect = cdb[5];
2830 tf->hob_lbal = cdb[7];
2831 tf->hob_lbam = cdb[9];
2832 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002833 tf->flags |= ATA_TFLAG_LBA48;
2834 } else
2835 tf->flags &= ~ATA_TFLAG_LBA48;
2836
2837 /*
2838 * Always copy low byte, device and command registers.
2839 */
Tejun Heo542b1442006-12-17 10:45:08 +09002840 tf->feature = cdb[4];
2841 tf->nsect = cdb[6];
2842 tf->lbal = cdb[8];
2843 tf->lbam = cdb[10];
2844 tf->lbah = cdb[12];
2845 tf->device = cdb[13];
2846 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002847 } else {
2848 /*
2849 * 12-byte CDB - incapable of extended commands.
2850 */
2851 tf->flags &= ~ATA_TFLAG_LBA48;
2852
Tejun Heo542b1442006-12-17 10:45:08 +09002853 tf->feature = cdb[3];
2854 tf->nsect = cdb[4];
2855 tf->lbal = cdb[5];
2856 tf->lbam = cdb[6];
2857 tf->lbah = cdb[7];
2858 tf->device = cdb[8];
2859 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002860 }
Albert Leefa4453c2007-06-07 15:52:07 +08002861
2862 /* enforce correct master/slave bit */
2863 tf->device = dev->devno ?
2864 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002865
Tejun Heobd30add2009-09-03 16:08:11 +09002866 switch (tf->command) {
Grant Grundler295124d2010-08-17 10:56:53 -07002867 /* READ/WRITE LONG use a non-standard sect_size */
Tejun Heobd30add2009-09-03 16:08:11 +09002868 case ATA_CMD_READ_LONG:
2869 case ATA_CMD_READ_LONG_ONCE:
2870 case ATA_CMD_WRITE_LONG:
2871 case ATA_CMD_WRITE_LONG_ONCE:
2872 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2873 goto invalid_fld;
2874 qc->sect_size = scsi_bufflen(scmd);
Grant Grundler295124d2010-08-17 10:56:53 -07002875 break;
2876
2877 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2878 case ATA_CMD_CFA_WRITE_NE:
2879 case ATA_CMD_CFA_TRANS_SECT:
2880 case ATA_CMD_CFA_WRITE_MULT_NE:
2881 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2882 case ATA_CMD_READ:
2883 case ATA_CMD_READ_EXT:
2884 case ATA_CMD_READ_QUEUED:
2885 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2886 case ATA_CMD_FPDMA_READ:
2887 case ATA_CMD_READ_MULTI:
2888 case ATA_CMD_READ_MULTI_EXT:
2889 case ATA_CMD_PIO_READ:
2890 case ATA_CMD_PIO_READ_EXT:
2891 case ATA_CMD_READ_STREAM_DMA_EXT:
2892 case ATA_CMD_READ_STREAM_EXT:
2893 case ATA_CMD_VERIFY:
2894 case ATA_CMD_VERIFY_EXT:
2895 case ATA_CMD_WRITE:
2896 case ATA_CMD_WRITE_EXT:
2897 case ATA_CMD_WRITE_FUA_EXT:
2898 case ATA_CMD_WRITE_QUEUED:
2899 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2900 case ATA_CMD_FPDMA_WRITE:
2901 case ATA_CMD_WRITE_MULTI:
2902 case ATA_CMD_WRITE_MULTI_EXT:
2903 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2904 case ATA_CMD_PIO_WRITE:
2905 case ATA_CMD_PIO_WRITE_EXT:
2906 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2907 case ATA_CMD_WRITE_STREAM_EXT:
2908 qc->sect_size = scmd->device->sector_size;
2909 break;
2910
2911 /* Everything else uses 512 byte "sectors" */
2912 default:
2913 qc->sect_size = ATA_SECT_SIZE;
Tejun Heobd30add2009-09-03 16:08:11 +09002914 }
2915
2916 /*
2917 * Set flags so that all registers will be written, pass on
2918 * write indication (used for PIO/DMA setup), result TF is
2919 * copied back and we don't whine too much about its failure.
2920 */
Douglas Gilbertbc496ed2010-02-01 13:11:38 -05002921 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heobd30add2009-09-03 16:08:11 +09002922 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2923 tf->flags |= ATA_TFLAG_WRITE;
2924
2925 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2926
2927 /*
2928 * Set transfer length.
2929 *
2930 * TODO: find out if we need to do more here to
2931 * cover scatter/gather case.
2932 */
2933 ata_qc_set_pc_nbytes(qc);
2934
2935 /* We may not issue DMA commands if no DMA mode is set */
2936 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2937 goto invalid_fld;
2938
Albert Lee1dce5892007-06-07 15:49:22 +08002939 /* sanity check for pio multi commands */
2940 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2941 goto invalid_fld;
2942
2943 if (is_multi_taskfile(tf)) {
2944 unsigned int multi_count = 1 << (cdb[1] >> 5);
2945
2946 /* compare the passed through multi_count
2947 * with the cached multi_count of libata
2948 */
2949 if (multi_count != dev->multi_count)
2950 ata_dev_printk(dev, KERN_WARNING,
2951 "invalid multi_count %u ignored\n",
2952 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002953 }
Albert Lee1dce5892007-06-07 15:49:22 +08002954
Jeff Garzikb0955182005-05-12 15:45:22 -04002955 /*
2956 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2957 * SET_FEATURES - XFER MODE must be preceded/succeeded
2958 * by an update to hardware-specific registers for each
2959 * controller (i.e. the reason for ->set_piomode(),
2960 * ->set_dmamode(), and ->post_set_mode() hooks).
2961 */
Tejun Heobd30add2009-09-03 16:08:11 +09002962 if (tf->command == ATA_CMD_SET_FEATURES &&
2963 tf->feature == SETFEATURES_XFER)
Tejun Heo9a405252005-12-02 11:49:11 +09002964 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002965
2966 /*
Tejun Heobd30add2009-09-03 16:08:11 +09002967 * Filter TPM commands by default. These provide an
2968 * essentially uncontrolled encrypted "back door" between
2969 * applications and the disk. Set libata.allow_tpm=1 if you
2970 * have a real reason for wanting to use them. This ensures
2971 * that installed software cannot easily mess stuff up without
2972 * user intent. DVR type users will probably ship with this enabled
2973 * for movie content management.
Jeff Garzikb0955182005-05-12 15:45:22 -04002974 *
Tejun Heobd30add2009-09-03 16:08:11 +09002975 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2976 * for this and should do in future but that it is not sufficient as
2977 * DCS is an optional feature set. Thus we also do the software filter
2978 * so that we comply with the TC consortium stated goal that the user
2979 * can turn off TC features of their system.
Jeff Garzikb0955182005-05-12 15:45:22 -04002980 */
Tejun Heobd30add2009-09-03 16:08:11 +09002981 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2982 goto invalid_fld;
Tejun Heoe61e0672006-05-15 20:57:40 +09002983
Jeff Garzikb0955182005-05-12 15:45:22 -04002984 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002985
2986 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002987 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002988 /* "Invalid field in cdb" */
2989 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002990}
2991
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002992static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
2993{
2994 struct ata_taskfile *tf = &qc->tf;
2995 struct scsi_cmnd *scmd = qc->scsicmd;
2996 struct ata_device *dev = qc->dev;
2997 const u8 *cdb = scmd->cmnd;
2998 u64 block;
2999 u32 n_block;
3000 u32 size;
3001 void *buf;
3002
3003 /* we may not issue DMA commands if no DMA mode is set */
3004 if (unlikely(!dev->dma_mode))
3005 goto invalid_fld;
3006
3007 if (unlikely(scmd->cmd_len < 16))
3008 goto invalid_fld;
3009 scsi_16_lba_len(cdb, &block, &n_block);
3010
3011 /* for now we only support WRITE SAME with the unmap bit set */
3012 if (unlikely(!(cdb[1] & 0x8)))
3013 goto invalid_fld;
3014
3015 /*
3016 * WRITE SAME always has a sector sized buffer as payload, this
3017 * should never be a multiple entry S/G list.
3018 */
3019 if (!scsi_sg_count(scmd))
3020 goto invalid_fld;
3021
3022 buf = page_address(sg_page(scsi_sglist(scmd)));
Martin K. Petersend0634c42009-11-26 12:00:43 -05003023 size = ata_set_lba_range_entries(buf, 512, block, n_block);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003024
3025 tf->protocol = ATA_PROT_DMA;
3026 tf->hob_feature = 0;
3027 tf->feature = ATA_DSM_TRIM;
3028 tf->hob_nsect = (size / 512) >> 8;
3029 tf->nsect = size / 512;
3030 tf->command = ATA_CMD_DSM;
3031 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3032 ATA_TFLAG_WRITE;
3033
3034 ata_qc_set_pc_nbytes(qc);
3035
3036 return 0;
3037
3038 invalid_fld:
3039 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3040 /* "Invalid field in cdb" */
3041 return 1;
3042}
3043
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044/**
3045 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3046 * @dev: ATA device
3047 * @cmd: SCSI command opcode to consider
3048 *
3049 * Look up the SCSI command given, and determine whether the
3050 * SCSI command is to be translated or simulated.
3051 *
3052 * RETURNS:
3053 * Pointer to translation function if possible, %NULL if not.
3054 */
3055
3056static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3057{
3058 switch (cmd) {
3059 case READ_6:
3060 case READ_10:
3061 case READ_16:
3062
3063 case WRITE_6:
3064 case WRITE_10:
3065 case WRITE_16:
3066 return ata_scsi_rw_xlat;
3067
Christoph Hellwig0cdd6eb2009-12-10 10:36:01 +01003068 case WRITE_SAME_16:
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003069 return ata_scsi_write_same_xlat;
3070
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071 case SYNCHRONIZE_CACHE:
3072 if (ata_try_flush_cache(dev))
3073 return ata_scsi_flush_xlat;
3074 break;
3075
3076 case VERIFY:
3077 case VERIFY_16:
3078 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04003079
3080 case ATA_12:
3081 case ATA_16:
3082 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04003083
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04003084 case START_STOP:
3085 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086 }
3087
3088 return NULL;
3089}
3090
3091/**
3092 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3093 * @ap: ATA port to which the command was being sent
3094 * @cmd: SCSI command to dump
3095 *
3096 * Prints the contents of a SCSI command via printk().
3097 */
3098
3099static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3100 struct scsi_cmnd *cmd)
3101{
3102#ifdef ATA_DEBUG
3103 struct scsi_device *scsidev = cmd->device;
3104 u8 *scsicmd = cmd->cmnd;
3105
3106 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09003107 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108 scsidev->channel, scsidev->id, scsidev->lun,
3109 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3110 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3111 scsicmd[8]);
3112#endif
3113}
3114
Tejun Heo542b1442006-12-17 10:45:08 +09003115static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09003116 void (*done)(struct scsi_cmnd *),
3117 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06003118{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003119 u8 scsi_op = scmd->cmnd[0];
3120 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09003121 int rc = 0;
3122
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003123 if (dev->class == ATA_DEV_ATA) {
3124 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3125 goto bad_cdb_len;
3126
3127 xlat_func = ata_get_xlat_func(dev, scsi_op);
3128 } else {
3129 if (unlikely(!scmd->cmd_len))
3130 goto bad_cdb_len;
3131
3132 xlat_func = NULL;
3133 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3134 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09003135 int len = COMMAND_SIZE(scsi_op);
3136 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003137 goto bad_cdb_len;
3138
3139 xlat_func = atapi_xlat;
3140 } else {
3141 /* ATA_16 passthru, treat as an ATA command */
3142 if (unlikely(scmd->cmd_len > 16))
3143 goto bad_cdb_len;
3144
3145 xlat_func = ata_get_xlat_func(dev, scsi_op);
3146 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09003147 }
3148
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003149 if (xlat_func)
3150 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3151 else
3152 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09003153
3154 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003155
3156 bad_cdb_len:
3157 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3158 scmd->cmd_len, scsi_op, dev->cdb_len);
3159 scmd->result = DID_ERROR << 16;
3160 done(scmd);
3161 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06003162}
3163
Linus Torvalds1da177e2005-04-16 15:20:36 -07003164/**
3165 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3166 * @cmd: SCSI command to be sent
3167 * @done: Completion function, called when command is complete
3168 *
3169 * In some cases, this function translates SCSI commands into
3170 * ATA taskfiles, and queues the taskfiles to be sent to
3171 * hardware. In other cases, this function simulates a
3172 * SCSI device by evaluating and responding to certain
3173 * SCSI commands. This creates the overall effect of
3174 * ATA and ATAPI devices appearing as SCSI devices.
3175 *
3176 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003177 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003178 *
3179 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09003180 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3181 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003183int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3184{
3185 struct ata_port *ap;
3186 struct ata_device *dev;
3187 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05003188 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09003189 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003190
Jeff Garzik35bb94b2006-04-11 13:12:34 -04003191 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003192
3193 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003194 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003195
3196 ata_scsi_dump_cdb(ap, cmd);
3197
3198 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003199 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09003200 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003201 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003202 cmd->result = (DID_BAD_TARGET << 16);
3203 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204 }
3205
Jeff Garzikba6a1302006-06-22 23:46:10 -04003206 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003207 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09003208 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003209}
3210
3211/**
3212 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003213 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214 * @cmd: SCSI command being sent to device.
3215 * @done: SCSI command completion function.
3216 *
3217 * Interprets and directly executes a select list of SCSI commands
3218 * that can be handled internally.
3219 *
3220 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003221 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003222 */
3223
Tejun Heo3373efd2006-05-15 20:57:53 +09003224void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003225 void (*done)(struct scsi_cmnd *))
3226{
3227 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04003228 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04003229 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230
Tejun Heo9a3dccc2006-01-06 09:56:18 +01003231 args.dev = dev;
3232 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233 args.cmd = cmd;
3234 args.done = done;
3235
3236 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003237 /* TODO: worth improving? */
3238 case FORMAT_UNIT:
3239 ata_scsi_invalid_field(cmd, done);
3240 break;
3241
3242 case INQUIRY:
3243 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04003244 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003245 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3246 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3247 else switch (scsicmd[2]) {
3248 case 0x00:
3249 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003251 case 0x80:
3252 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003253 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003254 case 0x83:
3255 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003256 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003257 case 0x89:
3258 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003259 break;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003260 case 0xb0:
3261 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3262 break;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06003263 case 0xb1:
3264 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3265 break;
Martin K. Petersen02e0a602010-09-10 01:23:18 -04003266 case 0xb2:
3267 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3268 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003269 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003270 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003271 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003272 }
3273 break;
3274
3275 case MODE_SENSE:
3276 case MODE_SENSE_10:
3277 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3278 break;
3279
3280 case MODE_SELECT: /* unconditionally return */
3281 case MODE_SELECT_10: /* bad-field-in-cdb */
3282 ata_scsi_invalid_field(cmd, done);
3283 break;
3284
3285 case READ_CAPACITY:
3286 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3287 break;
3288
3289 case SERVICE_ACTION_IN:
3290 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3291 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3292 else
3293 ata_scsi_invalid_field(cmd, done);
3294 break;
3295
3296 case REPORT_LUNS:
3297 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3298 break;
3299
3300 case REQUEST_SENSE:
3301 ata_scsi_set_sense(cmd, 0, 0, 0);
3302 cmd->result = (DRIVER_SENSE << 24);
3303 done(cmd);
3304 break;
3305
3306 /* if we reach this, then writeback caching is disabled,
3307 * turning this into a no-op.
3308 */
3309 case SYNCHRONIZE_CACHE:
3310 /* fall through */
3311
3312 /* no-op's, complete with success */
3313 case REZERO_UNIT:
3314 case SEEK_6:
3315 case SEEK_10:
3316 case TEST_UNIT_READY:
3317 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3318 break;
3319
3320 case SEND_DIAGNOSTIC:
3321 tmp8 = scsicmd[1] & ~(1 << 3);
3322 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3323 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3324 else
3325 ata_scsi_invalid_field(cmd, done);
3326 break;
3327
3328 /* all other commands */
3329 default:
3330 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3331 /* "Invalid command operation code" */
3332 done(cmd);
3333 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003334 }
3335}
3336
Tejun Heof3187192007-04-17 23:44:07 +09003337int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3338{
3339 int i, rc;
3340
3341 for (i = 0; i < host->n_ports; i++) {
3342 struct ata_port *ap = host->ports[i];
3343 struct Scsi_Host *shost;
3344
3345 rc = -ENOMEM;
3346 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3347 if (!shost)
3348 goto err_alloc;
3349
3350 *(struct ata_port **)&shost->hostdata[0] = ap;
3351 ap->scsi_host = shost;
3352
Gwendal Grignoud9027472010-05-25 12:31:38 -07003353 shost->transportt = ata_scsi_transport_template;
Tejun Heof3187192007-04-17 23:44:07 +09003354 shost->unique_id = ap->print_id;
3355 shost->max_id = 16;
3356 shost->max_lun = 1;
3357 shost->max_channel = 1;
3358 shost->max_cmd_len = 16;
3359
Tejun Heo31cc23b2007-09-23 13:14:12 +09003360 /* Schedule policy is determined by ->qc_defer()
3361 * callback and it needs to see every deferred qc.
3362 * Set host_blocked to 1 to prevent SCSI midlayer from
3363 * automatically deferring requests.
3364 */
3365 shost->max_host_blocked = 1;
3366
Tejun Heof3187192007-04-17 23:44:07 +09003367 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3368 if (rc)
3369 goto err_add;
3370 }
3371
3372 return 0;
3373
3374 err_add:
3375 scsi_host_put(host->ports[i]->scsi_host);
3376 err_alloc:
3377 while (--i >= 0) {
3378 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3379
3380 scsi_remove_host(shost);
3381 scsi_host_put(shost);
3382 }
3383 return rc;
3384}
3385
Tejun Heo1ae46312007-07-16 14:29:40 +09003386void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003387{
Tejun Heo1ae46312007-07-16 14:29:40 +09003388 int tries = 5;
3389 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003390 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003391 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003392
Tejun Heo1ae46312007-07-16 14:29:40 +09003393 repeat:
Tejun Heo1eca4362008-11-03 20:03:17 +09003394 ata_for_each_link(link, ap, EDGE) {
3395 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003396 struct scsi_device *sdev;
3397 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003398
Tejun Heo1eca4362008-11-03 20:03:17 +09003399 if (dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003400 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003401
Tejun Heo41bda9c2007-08-06 18:36:24 +09003402 if (ata_is_host_link(link))
3403 id = dev->devno;
3404 else
3405 channel = link->pmp;
3406
3407 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3408 NULL);
3409 if (!IS_ERR(sdev)) {
3410 dev->sdev = sdev;
3411 scsi_device_put(sdev);
Grant Grundler295124d2010-08-17 10:56:53 -07003412 } else {
3413 dev->sdev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003414 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003415 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003416 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003417
3418 /* If we scanned while EH was in progress or allocation
3419 * failure occurred, scan would have failed silently. Check
3420 * whether all devices are attached.
3421 */
Tejun Heo1eca4362008-11-03 20:03:17 +09003422 ata_for_each_link(link, ap, EDGE) {
3423 ata_for_each_dev(dev, link, ENABLED) {
3424 if (!dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003425 goto exit_loop;
3426 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003427 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003428 exit_loop:
3429 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003430 return;
3431
3432 /* we're missing some SCSI devices */
3433 if (sync) {
3434 /* If caller requested synchrnous scan && we've made
3435 * any progress, sleep briefly and repeat.
3436 */
3437 if (dev != last_failed_dev) {
3438 msleep(100);
3439 last_failed_dev = dev;
3440 goto repeat;
3441 }
3442
3443 /* We might be failing to detect boot device, give it
3444 * a few more chances.
3445 */
3446 if (--tries) {
3447 msleep(100);
3448 goto repeat;
3449 }
3450
3451 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3452 "failed without making any progress,\n"
3453 " switching to async\n");
3454 }
3455
Tejun Heoad72cf92010-07-02 10:03:52 +02003456 queue_delayed_work(system_long_wq, &ap->hotplug_task,
Tejun Heo1ae46312007-07-16 14:29:40 +09003457 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003458}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003459
3460/**
3461 * ata_scsi_offline_dev - offline attached SCSI device
3462 * @dev: ATA device to offline attached SCSI device for
3463 *
3464 * This function is called from ata_eh_hotplug() and responsible
3465 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003466 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003467 * against clearing.
3468 *
3469 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003470 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003471 *
3472 * RETURNS:
3473 * 1 if attached SCSI device exists, 0 otherwise.
3474 */
3475int ata_scsi_offline_dev(struct ata_device *dev)
3476{
3477 if (dev->sdev) {
3478 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3479 return 1;
3480 }
3481 return 0;
3482}
Tejun Heo580b21022006-05-31 18:28:05 +09003483
3484/**
3485 * ata_scsi_remove_dev - remove attached SCSI device
3486 * @dev: ATA device to remove attached SCSI device for
3487 *
3488 * This function is called from ata_eh_scsi_hotplug() and
3489 * responsible for removing the SCSI device attached to @dev.
3490 *
3491 * LOCKING:
3492 * Kernel thread context (may sleep).
3493 */
3494static void ata_scsi_remove_dev(struct ata_device *dev)
3495{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003496 struct ata_port *ap = dev->link->ap;
Tejun Heo580b21022006-05-31 18:28:05 +09003497 struct scsi_device *sdev;
3498 unsigned long flags;
3499
3500 /* Alas, we need to grab scan_mutex to ensure SCSI device
3501 * state doesn't change underneath us and thus
3502 * scsi_device_get() always succeeds. The mutex locking can
3503 * be removed if there is __scsi_device_get() interface which
3504 * increments reference counts regardless of device state.
3505 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003506 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003507 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b21022006-05-31 18:28:05 +09003508
Jeff Garzikcca39742006-08-24 03:19:22 -04003509 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b21022006-05-31 18:28:05 +09003510 sdev = dev->sdev;
3511 dev->sdev = NULL;
3512
3513 if (sdev) {
3514 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003515 * away underneath us after the host lock and
Tejun Heo580b21022006-05-31 18:28:05 +09003516 * scan_mutex are released. Hold onto it.
3517 */
3518 if (scsi_device_get(sdev) == 0) {
3519 /* The following ensures the attached sdev is
3520 * offline on return from ata_scsi_offline_dev()
3521 * regardless it wins or loses the race
3522 * against this function.
3523 */
3524 scsi_device_set_state(sdev, SDEV_OFFLINE);
3525 } else {
3526 WARN_ON(1);
3527 sdev = NULL;
3528 }
3529 }
3530
Jeff Garzikba6a1302006-06-22 23:46:10 -04003531 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003532 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003533
3534 if (sdev) {
3535 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
Kay Sieversb9d5fc42009-01-06 10:44:43 -08003536 dev_name(&sdev->sdev_gendev));
Tejun Heo580b21022006-05-31 18:28:05 +09003537
3538 scsi_remove_device(sdev);
3539 scsi_device_put(sdev);
3540 }
3541}
3542
Tejun Heo41bda9c2007-08-06 18:36:24 +09003543static void ata_scsi_handle_link_detach(struct ata_link *link)
3544{
3545 struct ata_port *ap = link->ap;
3546 struct ata_device *dev;
3547
Tejun Heo1eca4362008-11-03 20:03:17 +09003548 ata_for_each_dev(dev, link, ALL) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003549 unsigned long flags;
3550
3551 if (!(dev->flags & ATA_DFLAG_DETACHED))
3552 continue;
3553
3554 spin_lock_irqsave(ap->lock, flags);
3555 dev->flags &= ~ATA_DFLAG_DETACHED;
3556 spin_unlock_irqrestore(ap->lock, flags);
3557
3558 ata_scsi_remove_dev(dev);
3559 }
3560}
3561
Tejun Heo580b21022006-05-31 18:28:05 +09003562/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003563 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003564 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003565 *
3566 * Tell the block layer to send a media change notification
3567 * event.
3568 *
3569 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003570 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003571 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003572void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003573{
Tejun Heo854c73a2007-09-23 13:14:11 +09003574 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003575 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3576 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003577}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003578
3579/**
Tejun Heo580b21022006-05-31 18:28:05 +09003580 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003581 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b21022006-05-31 18:28:05 +09003582 *
3583 * Perform SCSI part of hotplug. It's executed from a separate
3584 * workqueue after EH completes. This is necessary because SCSI
3585 * hot plugging requires working EH and hot unplugging is
3586 * synchronized with hot plugging with a mutex.
3587 *
3588 * LOCKING:
3589 * Kernel thread context (may sleep).
3590 */
David Howells65f27f32006-11-22 14:55:48 +00003591void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b21022006-05-31 18:28:05 +09003592{
David Howells65f27f32006-11-22 14:55:48 +00003593 struct ata_port *ap =
3594 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003595 int i;
Tejun Heo580b21022006-05-31 18:28:05 +09003596
Tejun Heob51e9e52006-06-29 01:29:30 +09003597 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b21022006-05-31 18:28:05 +09003598 DPRINTK("ENTER/EXIT - unloading\n");
3599 return;
3600 }
3601
3602 DPRINTK("ENTER\n");
Tejun Heoad72cf92010-07-02 10:03:52 +02003603 mutex_lock(&ap->scsi_scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003604
Tejun Heo41bda9c2007-08-06 18:36:24 +09003605 /* Unplug detached devices. We cannot use link iterator here
3606 * because PMP links have to be scanned even if PMP is
3607 * currently not attached. Iterate manually.
3608 */
3609 ata_scsi_handle_link_detach(&ap->link);
3610 if (ap->pmp_link)
3611 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3612 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b21022006-05-31 18:28:05 +09003613
3614 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003615 ata_scsi_scan_host(ap, 0);
Tejun Heo580b21022006-05-31 18:28:05 +09003616
Tejun Heoad72cf92010-07-02 10:03:52 +02003617 mutex_unlock(&ap->scsi_scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003618 DPRINTK("EXIT\n");
3619}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003620
3621/**
3622 * ata_scsi_user_scan - indication for user-initiated bus scan
3623 * @shost: SCSI host to scan
3624 * @channel: Channel to scan
3625 * @id: ID to scan
3626 * @lun: LUN to scan
3627 *
3628 * This function is called when user explicitly requests bus
3629 * scan. Set probe pending flag and invoke EH.
3630 *
3631 * LOCKING:
3632 * SCSI layer (we don't care)
3633 *
3634 * RETURNS:
3635 * Zero.
3636 */
Gwendal Grignoud9027472010-05-25 12:31:38 -07003637int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3638 unsigned int id, unsigned int lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003639{
3640 struct ata_port *ap = ata_shost_to_port(shost);
3641 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003642 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003643
3644 if (!ap->ops->error_handler)
3645 return -EOPNOTSUPP;
3646
Tejun Heo41bda9c2007-08-06 18:36:24 +09003647 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003648 return -EINVAL;
3649
Tejun Heo071f44b2008-04-07 22:47:22 +09003650 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003651 if (channel != SCAN_WILD_CARD && channel)
3652 return -EINVAL;
3653 devno = id;
3654 } else {
3655 if (id != SCAN_WILD_CARD && id)
3656 return -EINVAL;
3657 devno = channel;
3658 }
3659
Jeff Garzikba6a1302006-06-22 23:46:10 -04003660 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003661
Tejun Heo41bda9c2007-08-06 18:36:24 +09003662 if (devno == SCAN_WILD_CARD) {
3663 struct ata_link *link;
3664
Tejun Heo1eca4362008-11-03 20:03:17 +09003665 ata_for_each_link(link, ap, EDGE) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003666 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003667 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003668 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003669 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003670 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003671 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003672
3673 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003674 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003675 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003676 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003677 } else
3678 rc = -EINVAL;
3679 }
3680
Tejun Heo309afcb2006-09-30 18:07:17 +09003681 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003682 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003683 spin_unlock_irqrestore(ap->lock, flags);
3684 ata_port_wait_eh(ap);
3685 } else
3686 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003687
3688 return rc;
3689}
zhao, forrest3057ac32006-06-12 12:01:34 +08003690
3691/**
Tejun Heod0171262006-06-12 22:51:14 +09003692 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003693 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003694 *
Tejun Heod0171262006-06-12 22:51:14 +09003695 * After ATA pass thru (SAT) commands are executed successfully,
Tejun Heoad72cf92010-07-02 10:03:52 +02003696 * libata need to propagate the changes to SCSI layer.
zhao, forrest3057ac32006-06-12 12:01:34 +08003697 *
Tejun Heod0171262006-06-12 22:51:14 +09003698 * LOCKING:
3699 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003700 */
David Howells65f27f32006-11-22 14:55:48 +00003701void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003702{
David Howells65f27f32006-11-22 14:55:48 +00003703 struct ata_port *ap =
3704 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003705 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003706 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003707 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003708
Tejun Heoad72cf92010-07-02 10:03:52 +02003709 mutex_lock(&ap->scsi_scan_mutex);
Tejun Heof84e7e42006-11-22 11:21:31 +09003710 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003711
Tejun Heo1eca4362008-11-03 20:03:17 +09003712 ata_for_each_link(link, ap, EDGE) {
3713 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003714 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003715
Tejun Heo1eca4362008-11-03 20:03:17 +09003716 if (!sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003717 continue;
3718 if (scsi_device_get(sdev))
3719 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003720
Tejun Heo41bda9c2007-08-06 18:36:24 +09003721 spin_unlock_irqrestore(ap->lock, flags);
3722 scsi_rescan_device(&(sdev->sdev_gendev));
3723 scsi_device_put(sdev);
3724 spin_lock_irqsave(ap->lock, flags);
3725 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003726 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003727
3728 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoad72cf92010-07-02 10:03:52 +02003729 mutex_unlock(&ap->scsi_scan_mutex);
zhao, forrest3057ac32006-06-12 12:01:34 +08003730}
Brian King80289162006-08-07 14:27:31 -05003731
3732/**
3733 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003734 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003735 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003736 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003737 *
3738 * LOCKING:
3739 * PCI/etc. bus probe sem.
3740 *
3741 * RETURNS:
3742 * ata_port pointer on success / NULL on failure.
3743 */
3744
Jeff Garzikcca39742006-08-24 03:19:22 -04003745struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003746 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003747 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003748{
Tejun Heof3187192007-04-17 23:44:07 +09003749 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003750
Tejun Heof3187192007-04-17 23:44:07 +09003751 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003752 if (!ap)
3753 return NULL;
3754
Tejun Heof3187192007-04-17 23:44:07 +09003755 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003756 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003757 ap->pio_mask = port_info->pio_mask;
3758 ap->mwdma_mask = port_info->mwdma_mask;
3759 ap->udma_mask = port_info->udma_mask;
3760 ap->flags |= port_info->flags;
3761 ap->ops = port_info->port_ops;
3762 ap->cbl = ATA_CBL_SATA;
3763
Brian King80289162006-08-07 14:27:31 -05003764 return ap;
3765}
3766EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3767
3768/**
3769 * ata_sas_port_start - Set port up for dma.
3770 * @ap: Port to initialize
3771 *
3772 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003773 * initialized.
Brian King80289162006-08-07 14:27:31 -05003774 *
3775 * May be used as the port_start() entry in ata_port_operations.
3776 *
3777 * LOCKING:
3778 * Inherited from caller.
3779 */
3780int ata_sas_port_start(struct ata_port *ap)
3781{
James Bottomleydde20202008-02-19 11:36:56 +01003782 return 0;
Brian King80289162006-08-07 14:27:31 -05003783}
3784EXPORT_SYMBOL_GPL(ata_sas_port_start);
3785
3786/**
3787 * ata_port_stop - Undo ata_sas_port_start()
3788 * @ap: Port to shut down
3789 *
Brian King80289162006-08-07 14:27:31 -05003790 * May be used as the port_stop() entry in ata_port_operations.
3791 *
3792 * LOCKING:
3793 * Inherited from caller.
3794 */
3795
3796void ata_sas_port_stop(struct ata_port *ap)
3797{
Brian King80289162006-08-07 14:27:31 -05003798}
3799EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3800
3801/**
3802 * ata_sas_port_init - Initialize a SATA device
3803 * @ap: SATA port to initialize
3804 *
3805 * LOCKING:
3806 * PCI/etc. bus probe sem.
3807 *
3808 * RETURNS:
3809 * Zero on success, non-zero on error.
3810 */
3811
3812int ata_sas_port_init(struct ata_port *ap)
3813{
3814 int rc = ap->ops->port_start(ap);
3815
Tejun Heof3187192007-04-17 23:44:07 +09003816 if (!rc) {
3817 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003818 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003819 }
Brian King80289162006-08-07 14:27:31 -05003820
3821 return rc;
3822}
3823EXPORT_SYMBOL_GPL(ata_sas_port_init);
3824
3825/**
3826 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3827 * @ap: SATA port to destroy
3828 *
3829 */
3830
3831void ata_sas_port_destroy(struct ata_port *ap)
3832{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003833 if (ap->ops->port_stop)
3834 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003835 kfree(ap);
3836}
3837EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3838
3839/**
3840 * ata_sas_slave_configure - Default slave_config routine for libata devices
3841 * @sdev: SCSI device to configure
3842 * @ap: ATA port to which SCSI device is attached
3843 *
3844 * RETURNS:
3845 * Zero.
3846 */
3847
3848int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3849{
3850 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003851 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003852 return 0;
3853}
3854EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3855
3856/**
3857 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3858 * @cmd: SCSI command to be sent
3859 * @done: Completion function, called when command is complete
3860 * @ap: ATA port to which the command is being sent
3861 *
3862 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003863 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3864 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003865 */
3866
3867int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3868 struct ata_port *ap)
3869{
Brian King08475a12006-11-20 13:51:56 -06003870 int rc = 0;
3871
Brian King80289162006-08-07 14:27:31 -05003872 ata_scsi_dump_cdb(ap, cmd);
3873
Tejun Heo2486fa52008-07-31 07:52:40 +09003874 if (likely(ata_dev_enabled(ap->link.device)))
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003875 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003876 else {
3877 cmd->result = (DID_BAD_TARGET << 16);
3878 done(cmd);
3879 }
Brian King08475a12006-11-20 13:51:56 -06003880 return rc;
Brian King80289162006-08-07 14:27:31 -05003881}
3882EXPORT_SYMBOL_GPL(ata_sas_queuecmd);