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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
Jeff Garzikb27dcfb2010-11-17 22:56:48 -0500349static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
Douglas Gilbertae006512005-10-09 09:09:35 -0400350{
351 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
352 /* "Invalid field in cbd" */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -0500353 cmd->scsi_done(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -0400354}
355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356/**
357 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
358 * @sdev: SCSI device for which BIOS geometry is to be determined
359 * @bdev: block device associated with @sdev
360 * @capacity: capacity of SCSI device
361 * @geom: location to which geometry will be output
362 *
363 * Generic bios head/sector/cylinder calculator
364 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
365 * mapping. Some situations may arise where the disk is not
366 * bootable if this is not used.
367 *
368 * LOCKING:
369 * Defined by the SCSI layer. We don't really care.
370 *
371 * RETURNS:
372 * Zero.
373 */
374int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
375 sector_t capacity, int geom[])
376{
377 geom[0] = 255;
378 geom[1] = 63;
379 sector_div(capacity, 255*63);
380 geom[2] = capacity;
381
382 return 0;
383}
384
Jeff Garzikb0955182005-05-12 15:45:22 -0400385/**
Tejun Heod8d91292010-05-15 20:09:34 +0200386 * ata_scsi_unlock_native_capacity - unlock native capacity
387 * @sdev: SCSI device to adjust device capacity for
388 *
389 * This function is called if a partition on @sdev extends beyond
390 * the end of the device. It requests EH to unlock HPA.
391 *
392 * LOCKING:
393 * Defined by the SCSI layer. Might sleep.
394 */
395void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
396{
397 struct ata_port *ap = ata_shost_to_port(sdev->host);
398 struct ata_device *dev;
399 unsigned long flags;
400
401 spin_lock_irqsave(ap->lock, flags);
402
403 dev = ata_scsi_find_dev(ap, sdev);
404 if (dev && dev->n_sectors < dev->n_native_sectors) {
405 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
406 dev->link->eh_info.action |= ATA_EH_RESET;
407 ata_port_schedule_eh(ap);
408 }
409
410 spin_unlock_irqrestore(ap->lock, flags);
411 ata_port_wait_eh(ap);
412}
413
414/**
Tejun Heo5924b742007-01-02 20:20:07 +0900415 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
Randy Dunlap5eb66fe2009-01-20 16:28:59 -0800416 * @ap: target port
Tejun Heo5924b742007-01-02 20:20:07 +0900417 * @sdev: SCSI device to get identify data for
418 * @arg: User buffer area for identify data
419 *
420 * LOCKING:
421 * Defined by the SCSI layer. We don't really care.
422 *
423 * RETURNS:
424 * Zero on success, negative errno on error.
425 */
Jeff Garzik94be9a52009-01-16 10:17:09 -0500426static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
427 void __user *arg)
Tejun Heo5924b742007-01-02 20:20:07 +0900428{
Tejun Heo5924b742007-01-02 20:20:07 +0900429 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
430 u16 __user *dst = arg;
431 char buf[40];
432
433 if (!dev)
434 return -ENOMSG;
435
436 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
437 return -EFAULT;
438
439 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
440 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
441 return -EFAULT;
442
443 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
444 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
445 return -EFAULT;
446
447 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
448 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
449 return -EFAULT;
450
451 return 0;
452}
453
454/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800456 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400457 * @arg: User provided data for issuing command
458 *
459 * LOCKING:
460 * Defined by the SCSI layer. We don't really care.
461 *
462 * RETURNS:
463 * Zero on success, negative errno on error.
464 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400465int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
466{
467 int rc = 0;
468 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700469 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400470 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600471 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700472 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400473
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500474 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400475 return -EINVAL;
476
477 if (copy_from_user(args, arg, sizeof(args)))
478 return -EFAULT;
479
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700480 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
481 if (!sensebuf)
482 return -ENOMEM;
483
Jeff Garzikb0955182005-05-12 15:45:22 -0400484 memset(scsi_cmd, 0, sizeof(scsi_cmd));
485
486 if (args[3]) {
Grant Grundler295124d2010-08-17 10:56:53 -0700487 argsize = ATA_SECT_SIZE * args[3];
Jeff Garzikb0955182005-05-12 15:45:22 -0400488 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400489 if (argbuf == NULL) {
490 rc = -ENOMEM;
491 goto error;
492 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400493
494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400496 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600497 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400498 } else {
499 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700500 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600501 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400502 }
503
504 scsi_cmd[0] = ATA_16;
505
506 scsi_cmd[4] = args[2];
Bartlomiej Zolnierkiewicza4f19042008-10-10 22:39:20 +0200507 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
Jeff Garzikb0955182005-05-12 15:45:22 -0400508 scsi_cmd[6] = args[3];
509 scsi_cmd[8] = args[1];
510 scsi_cmd[10] = 0x4f;
511 scsi_cmd[12] = 0xc2;
512 } else {
513 scsi_cmd[6] = args[1];
514 }
515 scsi_cmd[14] = args[0];
516
517 /* Good values for timeout and retries? Values below
518 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700519 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900520 sensebuf, (10*HZ), 5, 0, NULL);
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700521
522 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
523 u8 *desc = sensebuf + 8;
524 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
525
526 /* If we set cc then ATA pass-through will cause a
527 * check condition even if no error. Filter that. */
528 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
529 struct scsi_sense_hdr sshdr;
530 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400531 &sshdr);
532 if (sshdr.sense_key == 0 &&
533 sshdr.asc == 0 && sshdr.ascq == 0)
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700534 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
535 }
536
537 /* Send userspace a few ATA registers (same as drivers/ide) */
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
539 desc[0] == 0x09) { /* code is "ATA Descriptor" */
540 args[0] = desc[13]; /* status */
541 args[1] = desc[3]; /* error */
542 args[2] = desc[5]; /* sector count (0:7) */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700543 if (copy_to_user(arg, args, sizeof(args)))
544 rc = -EFAULT;
545 }
546 }
547
548
549 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400550 rc = -EIO;
551 goto error;
552 }
553
Jeff Garzikb0955182005-05-12 15:45:22 -0400554 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500555 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400556 rc = -EFAULT;
557error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700558 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700559 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400560 return rc;
561}
562
563/**
564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800565 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400566 * @arg: User provided data for issuing command
567 *
568 * LOCKING:
569 * Defined by the SCSI layer. We don't really care.
570 *
571 * RETURNS:
572 * Zero on success, negative errno on error.
573 */
574int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
575{
576 int rc = 0;
577 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800578 u8 args[7], *sensebuf = NULL;
579 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400580
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500581 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400582 return -EINVAL;
583
584 if (copy_from_user(args, arg, sizeof(args)))
585 return -EFAULT;
586
David Milburnaf068bd2007-01-30 00:59:15 -0800587 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
588 if (!sensebuf)
589 return -ENOMEM;
590
Jeff Garzikb0955182005-05-12 15:45:22 -0400591 memset(scsi_cmd, 0, sizeof(scsi_cmd));
592 scsi_cmd[0] = ATA_16;
593 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400595 scsi_cmd[4] = args[1];
596 scsi_cmd[6] = args[2];
597 scsi_cmd[8] = args[3];
598 scsi_cmd[10] = args[4];
599 scsi_cmd[12] = args[5];
Mark Lord277239f2007-03-30 17:45:52 -0400600 scsi_cmd[13] = args[6] & 0x4f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400601 scsi_cmd[14] = args[0];
602
Jeff Garzikb0955182005-05-12 15:45:22 -0400603 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500604 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800605 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900606 sensebuf, (10*HZ), 5, 0, NULL);
Jeff Garzikb0955182005-05-12 15:45:22 -0400607
David Milburnaf068bd2007-01-30 00:59:15 -0800608 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
609 u8 *desc = sensebuf + 8;
610 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
611
612 /* If we set cc then ATA pass-through will cause a
613 * check condition even if no error. Filter that. */
614 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
615 struct scsi_sense_hdr sshdr;
616 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
617 &sshdr);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400618 if (sshdr.sense_key == 0 &&
619 sshdr.asc == 0 && sshdr.ascq == 0)
David Milburnaf068bd2007-01-30 00:59:15 -0800620 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
621 }
622
623 /* Send userspace ATA registers */
624 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
625 desc[0] == 0x09) {/* code is "ATA Descriptor" */
626 args[0] = desc[13]; /* status */
627 args[1] = desc[3]; /* error */
628 args[2] = desc[5]; /* sector count (0:7) */
629 args[3] = desc[7]; /* lbal */
630 args[4] = desc[9]; /* lbam */
631 args[5] = desc[11]; /* lbah */
632 args[6] = desc[12]; /* select */
633 if (copy_to_user(arg, args, sizeof(args)))
634 rc = -EFAULT;
635 }
636 }
637
638 if (cmd_result) {
639 rc = -EIO;
640 goto error;
641 }
642
643 error:
644 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400645 return rc;
646}
647
Alan Coxe3cf95d2009-04-09 17:31:17 +0100648static int ata_ioc32(struct ata_port *ap)
649{
650 if (ap->flags & ATA_FLAG_PIO_DMA)
651 return 1;
652 if (ap->pflags & ATA_PFLAG_PIO32)
653 return 1;
654 return 0;
655}
656
Jeff Garzik94be9a52009-01-16 10:17:09 -0500657int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
658 int cmd, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 int val = -EINVAL, rc = -EINVAL;
Alan Coxe3cf95d2009-04-09 17:31:17 +0100661 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 switch (cmd) {
664 case ATA_IOC_GET_IO32:
Alan Coxe3cf95d2009-04-09 17:31:17 +0100665 spin_lock_irqsave(ap->lock, flags);
666 val = ata_ioc32(ap);
667 spin_unlock_irqrestore(ap->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (copy_to_user(arg, &val, 1))
669 return -EFAULT;
670 return 0;
671
672 case ATA_IOC_SET_IO32:
673 val = (unsigned long) arg;
Alan Coxe3cf95d2009-04-09 17:31:17 +0100674 rc = 0;
675 spin_lock_irqsave(ap->lock, flags);
676 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
677 if (val)
678 ap->pflags |= ATA_PFLAG_PIO32;
679 else
680 ap->pflags &= ~ATA_PFLAG_PIO32;
681 } else {
682 if (val != ata_ioc32(ap))
683 rc = -EINVAL;
684 }
685 spin_unlock_irqrestore(ap->lock, flags);
686 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
Tejun Heo5924b742007-01-02 20:20:07 +0900688 case HDIO_GET_IDENTITY:
Jeff Garzik94be9a52009-01-16 10:17:09 -0500689 return ata_get_identity(ap, scsidev, arg);
Tejun Heo5924b742007-01-02 20:20:07 +0900690
Jeff Garzikb0955182005-05-12 15:45:22 -0400691 case HDIO_DRIVE_CMD:
692 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
693 return -EACCES;
694 return ata_cmd_ioctl(scsidev, arg);
695
696 case HDIO_DRIVE_TASK:
697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
698 return -EACCES;
699 return ata_task_ioctl(scsidev, arg);
700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 default:
702 rc = -ENOTTY;
703 break;
704 }
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 return rc;
707}
Jeff Garzik94be9a52009-01-16 10:17:09 -0500708EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
709
710int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
711{
712 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
713 scsidev, cmd, arg);
714}
715EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
717/**
718 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 * @dev: ATA device to which the new command is attached
720 * @cmd: SCSI command that originated this ATA command
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 *
722 * Obtain a reference to an unused ata_queued_cmd structure,
723 * which is the basic libata structure representing a single
724 * ATA command sent to the hardware.
725 *
726 * If a command was available, fill in the SCSI-specific
727 * portions of the structure with information on the
728 * current command.
729 *
730 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400731 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 *
733 * RETURNS:
734 * Command allocated, or %NULL if none available.
735 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100736static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
Jeff Garzikb27dcfb2010-11-17 22:56:48 -0500737 struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738{
739 struct ata_queued_cmd *qc;
740
Tejun Heo8a8bc222008-11-10 14:48:21 +0900741 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 if (qc) {
743 qc->scsicmd = cmd;
Jeff Garzikb27dcfb2010-11-17 22:56:48 -0500744 qc->scsidone = cmd->scsi_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Tejun Heoff2aeb12007-12-05 16:43:11 +0900746 qc->sg = scsi_sglist(cmd);
Boaz Harrosh71201652007-09-18 17:48:50 +0200747 qc->n_elem = scsi_sg_count(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 } else {
749 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -0500750 cmd->scsi_done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 }
752
753 return qc;
754}
755
Tejun Heoaacda372008-03-18 17:47:43 +0900756static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
757{
758 struct scsi_cmnd *scmd = qc->scsicmd;
759
760 qc->extrabytes = scmd->request->extra_len;
761 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
762}
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400765 * ata_dump_status - user friendly display of error info
766 * @id: id of the port in question
767 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400769 * Decode and dump the ATA error/status registers for the user so
770 * that they have some idea what really happened at the non
771 * make-believe layer.
772 *
773 * LOCKING:
774 * inherited from caller
775 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100776static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400777{
778 u8 stat = tf->command, err = tf->feature;
779
780 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
781 if (stat & ATA_BUSY) {
782 printk("Busy }\n"); /* Data is not valid in this case */
783 } else {
784 if (stat & 0x40) printk("DriveReady ");
785 if (stat & 0x20) printk("DeviceFault ");
786 if (stat & 0x10) printk("SeekComplete ");
787 if (stat & 0x08) printk("DataRequest ");
788 if (stat & 0x04) printk("CorrectedError ");
789 if (stat & 0x02) printk("Index ");
790 if (stat & 0x01) printk("Error ");
791 printk("}\n");
792
793 if (err) {
794 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
795 if (err & 0x04) printk("DriveStatusError ");
796 if (err & 0x80) {
797 if (err & 0x04) printk("BadCRC ");
798 else printk("Sector ");
799 }
800 if (err & 0x40) printk("UncorrectableError ");
801 if (err & 0x10) printk("SectorIdNotFound ");
802 if (err & 0x02) printk("TrackZeroNotFound ");
803 if (err & 0x01) printk("AddrMarkNotFound ");
804 printk("}\n");
805 }
806 }
807}
808
809/**
810 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800811 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400812 * @drv_stat: value contained in ATA status register
813 * @drv_err: value contained in ATA error register
814 * @sk: the sense key we'll fill out
815 * @asc: the additional sense code we'll fill out
816 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900817 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400818 *
819 * Converts an ATA error into a SCSI error. Fill out pointers to
820 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
821 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 *
823 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400824 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100826static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
827 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828{
Jeff Garzikb0955182005-05-12 15:45:22 -0400829 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100832 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 /* BBD|ECC|ID|MAR */
834 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
835 /* BBD|ECC|ID */
836 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
837 /* ECC|MC|MARK */
838 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
839 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
840 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
841 /* MC|ID|ABRT|TRK0|MARK */
842 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
843 /* MCR|MARK */
844 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
845 /* Bad address mark */
846 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
847 /* TRK0 */
848 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
849 /* Abort & !ICRC */
850 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
851 /* Media change request */
852 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
853 /* SRV */
854 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
855 /* Media change */
856 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
857 /* ECC */
858 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
859 /* BBD - block marked bad */
860 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
861 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
862 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100863 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 /* Must be first because BUSY means no other bits valid */
865 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
866 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
867 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
868 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
869 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
870 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 /*
873 * Is this an error we can process/parse
874 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400875 if (drv_stat & ATA_BUSY) {
876 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878
Jeff Garzikb0955182005-05-12 15:45:22 -0400879 if (drv_err) {
880 /* Look for drv_err */
881 for (i = 0; sense_table[i][0] != 0xFF; i++) {
882 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500883 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400884 sense_table[i][0]) {
885 *sk = sense_table[i][1];
886 *asc = sense_table[i][2];
887 *ascq = sense_table[i][3];
888 goto translate_done;
889 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400891 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900892 if (verbose)
893 printk(KERN_WARNING "ata%u: no sense translation for "
894 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 }
896
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400898 for (i = 0; stat_table[i][0] != 0xFF; i++) {
899 if (stat_table[i][0] & drv_stat) {
900 *sk = stat_table[i][1];
901 *asc = stat_table[i][2];
902 *ascq = stat_table[i][3];
903 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400906 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900907 if (verbose)
908 printk(KERN_WARNING "ata%u: no sense translation for "
909 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
Alan Cox2d202022006-03-21 15:53:46 +0000911 /* We need a sensible error return here, which is tricky, and one
912 that won't cause people to do things like return a disk wrongly */
913 *sk = ABORTED_COMMAND;
914 *asc = 0x00;
915 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400916
917 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900918 if (verbose)
919 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
920 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
921 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400922 return;
923}
924
925/*
Tejun Heo750426a2006-11-14 22:37:35 +0900926 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400927 * @qc: Command that completed.
928 *
929 * This function is specific to the ATA descriptor format sense
930 * block specified for the ATA pass through commands. Regardless
931 * of whether the command errored or not, return a sense
932 * block. Copy all controller registers into the sense
933 * block. Clear sense key, ASC & ASCQ if there is no error.
934 *
935 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900936 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400937 */
Tejun Heo750426a2006-11-14 22:37:35 +0900938static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400939{
940 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900941 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400942 unsigned char *sb = cmd->sense_buffer;
943 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900944 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400945
946 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
947
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400948 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400949
950 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400951 * Use ata_to_sense_error() to map status register bits
952 * onto sense key, asc & ascq.
953 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900954 if (qc->err_mask ||
955 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900956 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900957 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400958 sb[1] &= 0x0f;
959 }
960
961 /*
962 * Sense data is current and format is descriptor.
963 */
964 sb[0] = 0x72;
965
966 desc[0] = 0x09;
967
Tejun Heof38621b2006-11-14 22:37:35 +0900968 /* set length of additional sense data */
969 sb[7] = 14;
970 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400971
972 /*
973 * Copy registers into sense buffer.
974 */
975 desc[2] = 0x00;
976 desc[3] = tf->feature; /* == error reg */
977 desc[5] = tf->nsect;
978 desc[7] = tf->lbal;
979 desc[9] = tf->lbam;
980 desc[11] = tf->lbah;
981 desc[12] = tf->device;
982 desc[13] = tf->command; /* == status reg */
983
984 /*
985 * Fill in Extend bit, and the high order bytes
986 * if applicable.
987 */
988 if (tf->flags & ATA_TFLAG_LBA48) {
989 desc[2] |= 0x01;
990 desc[4] = tf->hob_nsect;
991 desc[6] = tf->hob_lbal;
992 desc[8] = tf->hob_lbam;
993 desc[10] = tf->hob_lbah;
994 }
995}
996
997/**
Tejun Heo750426a2006-11-14 22:37:35 +0900998 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -0400999 * @qc: Command that we are erroring out
1000 *
Tejun Heod25614b2006-11-14 22:37:35 +09001001 * Generate sense block for a failed ATA command @qc. Descriptor
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001002 * format is used to accommodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -04001003 *
1004 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +09001005 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -04001006 */
Tejun Heo750426a2006-11-14 22:37:35 +09001007static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04001008{
Tejun Heod25614b2006-11-14 22:37:35 +09001009 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -04001010 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +09001011 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -04001012 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +09001013 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +09001014 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +09001015 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -04001016
1017 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1018
Jeff Garzik0e5dec42005-10-06 09:40:20 -04001019 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -04001020
Tejun Heod25614b2006-11-14 22:37:35 +09001021 /* sense data is current and format is descriptor */
1022 sb[0] = 0x72;
1023
1024 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -04001025 * onto sense key, asc & ascq.
1026 */
Tejun Heo058e55e2006-04-02 18:51:53 +09001027 if (qc->err_mask ||
1028 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +09001029 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +09001030 &sb[1], &sb[2], &sb[3], verbose);
1031 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -04001032 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
Tejun Heod25614b2006-11-14 22:37:35 +09001034 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -04001035
Tejun Heod25614b2006-11-14 22:37:35 +09001036 /* information sense data descriptor */
1037 sb[7] = 12;
1038 desc[0] = 0x00;
1039 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -05001040
Tejun Heod25614b2006-11-14 22:37:35 +09001041 desc[2] |= 0x80; /* valid */
1042 desc[6] = block >> 40;
1043 desc[7] = block >> 32;
1044 desc[8] = block >> 24;
1045 desc[9] = block >> 16;
1046 desc[10] = block >> 8;
1047 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
Brian Kinga6cce2a2006-03-17 17:04:15 -06001050static void ata_scsi_sdev_config(struct scsi_device *sdev)
1051{
1052 sdev->use_10_for_rw = 1;
1053 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001054
1055 /* Schedule policy is determined by ->qc_defer() callback and
1056 * it needs to see every deferred qc. Set dev_blocked to 1 to
1057 * prevent SCSI midlayer from automatically deferring
1058 * requests.
1059 */
1060 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001061}
1062
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001063/**
1064 * atapi_drain_needed - Check whether data transfer may overflow
Randy Dunlap73fd8b62008-02-19 13:43:21 -08001065 * @rq: request to be checked
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001066 *
1067 * ATAPI commands which transfer variable length data to host
1068 * might overflow due to application error or hardare bug. This
1069 * function checks whether overflow should be drained and ignored
1070 * for @request.
1071 *
1072 * LOCKING:
1073 * None.
1074 *
1075 * RETURNS:
1076 * 1 if ; otherwise, 0.
1077 */
1078static int atapi_drain_needed(struct request *rq)
1079{
Christoph Hellwig33659eb2010-08-07 18:17:56 +02001080 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001081 return 0;
1082
Christoph Hellwig7b6d91d2010-08-07 18:20:39 +02001083 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001084 return 0;
1085
1086 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1087}
1088
1089static int ata_scsi_dev_config(struct scsi_device *sdev,
1090 struct ata_device *dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -06001091{
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02001092 if (!ata_id_has_unload(dev->id))
1093 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1094
Tejun Heo914ed352006-11-01 18:39:55 +09001095 /* configure max sectors */
Martin K. Petersen086fa5f2010-02-26 00:20:38 -05001096 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -06001097
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001098 if (dev->class == ATA_DEV_ATAPI) {
1099 struct request_queue *q = sdev->request_queue;
1100 void *buf;
1101
Tejun Heo729a6a32011-01-20 13:59:06 +01001102 sdev->sector_size = ATA_SECT_SIZE;
1103
1104 /* set DMA padding */
FUJITA Tomonori27f82212008-07-04 09:30:03 +02001105 blk_queue_update_dma_pad(sdev->request_queue,
1106 ATA_DMA_PAD_SZ - 1);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001107
1108 /* configure draining */
1109 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1110 if (!buf) {
1111 ata_dev_printk(dev, KERN_ERR,
1112 "drain buffer allocation failed\n");
1113 return -ENOMEM;
1114 }
1115
1116 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1117 } else {
Grant Grundler295124d2010-08-17 10:56:53 -07001118 sdev->sector_size = ata_id_logical_sector_size(dev->id);
Tejun Heod8cf5382008-01-15 08:46:59 +09001119 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +01001120 }
Tejun Heod8cf5382008-01-15 08:46:59 +09001121
Tejun Heo729a6a32011-01-20 13:59:06 +01001122 /*
1123 * ata_pio_sectors() expects buffer for each sector to not cross
1124 * page boundary. Enforce it by requiring buffers to be sector
1125 * aligned, which works iff sector_size is not larger than
1126 * PAGE_SIZE. ATAPI devices also need the alignment as
1127 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1128 */
1129 if (sdev->sector_size > PAGE_SIZE)
1130 ata_dev_printk(dev, KERN_WARNING,
1131 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1132 sdev->sector_size);
1133
1134 blk_queue_update_dma_alignment(sdev->request_queue,
1135 sdev->sector_size - 1);
1136
Jeff Garzikf26792d2007-10-29 17:18:39 -04001137 if (dev->flags & ATA_DFLAG_AN)
1138 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1139
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001140 if (dev->flags & ATA_DFLAG_NCQ) {
1141 int depth;
1142
1143 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1144 depth = min(ATA_MAX_QUEUE - 1, depth);
Tejun Heo8a8bc222008-11-10 14:48:21 +09001145 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001146 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001147
Grant Grundler295124d2010-08-17 10:56:53 -07001148 dev->sdev = sdev;
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001149 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001150}
1151
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152/**
1153 * ata_scsi_slave_config - Set SCSI device attributes
1154 * @sdev: SCSI device to examine
1155 *
1156 * This is called before we actually start reading
1157 * and writing to the device, to configure certain
1158 * SCSI mid-layer behaviors.
1159 *
1160 * LOCKING:
1161 * Defined by SCSI layer. We don't really care.
1162 */
1163
1164int ata_scsi_slave_config(struct scsi_device *sdev)
1165{
Tejun Heo31534362006-05-31 18:27:36 +09001166 struct ata_port *ap = ata_shost_to_port(sdev->host);
1167 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001168 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +09001169
Brian Kinga6cce2a2006-03-17 17:04:15 -06001170 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
Tejun Heo31534362006-05-31 18:27:36 +09001172 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001173 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001175 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176}
1177
1178/**
Tejun Heo83c47bc2006-05-31 18:28:07 +09001179 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1180 * @sdev: SCSI device to be destroyed
1181 *
1182 * @sdev is about to be destroyed for hot/warm unplugging. If
1183 * this unplugging was initiated by libata as indicated by NULL
1184 * dev->sdev, this function doesn't have to do anything.
1185 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1186 * Clear dev->sdev, schedule the device for ATA detach and invoke
1187 * EH.
1188 *
1189 * LOCKING:
1190 * Defined by SCSI layer. We don't really care.
1191 */
1192void ata_scsi_slave_destroy(struct scsi_device *sdev)
1193{
1194 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001195 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001196 unsigned long flags;
1197 struct ata_device *dev;
1198
1199 if (!ap->ops->error_handler)
1200 return;
1201
Jeff Garzikba6a1302006-06-22 23:46:10 -04001202 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09001203 dev = __ata_scsi_find_dev(ap, sdev);
1204 if (dev && dev->sdev) {
1205 /* SCSI device already in CANCEL state, no need to offline it */
1206 dev->sdev = NULL;
1207 dev->flags |= ATA_DFLAG_DETACH;
1208 ata_port_schedule_eh(ap);
1209 }
Jeff Garzikba6a1302006-06-22 23:46:10 -04001210 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001211
1212 kfree(q->dma_drain_buffer);
1213 q->dma_drain_buffer = NULL;
1214 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001215}
1216
1217/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001218 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1219 * @sdev: SCSI device to configure queue depth for
1220 * @queue_depth: new queue depth
Mike Christiee881a172009-10-15 17:46:39 -07001221 * @reason: calling context
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001222 *
1223 * This is libata standard hostt->change_queue_depth callback.
1224 * SCSI will call into this callback when user tries to set queue
1225 * depth via sysfs.
1226 *
1227 * LOCKING:
1228 * SCSI layer (we don't care)
1229 *
1230 * RETURNS:
1231 * Newly configured queue depth.
1232 */
Mike Christiee881a172009-10-15 17:46:39 -07001233int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1234 int reason)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001235{
1236 struct ata_port *ap = ata_shost_to_port(sdev->host);
1237 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001238 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001239
Mike Christiee881a172009-10-15 17:46:39 -07001240 if (reason != SCSI_QDEPTH_DEFAULT)
1241 return -EOPNOTSUPP;
1242
Tejun Heoc3c70c42007-02-20 23:31:22 +09001243 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001244 return sdev->queue_depth;
1245
1246 dev = ata_scsi_find_dev(ap, sdev);
1247 if (!dev || !ata_dev_enabled(dev))
1248 return sdev->queue_depth;
1249
Tejun Heoc3c70c42007-02-20 23:31:22 +09001250 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001251 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001252 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1253 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001254 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001255 queue_depth = 1;
1256 }
Tejun Heo360f6542006-09-30 19:45:00 +09001257 spin_unlock_irqrestore(ap->lock, flags);
1258
Tejun Heoc3c70c42007-02-20 23:31:22 +09001259 /* limit and apply queue depth */
1260 queue_depth = min(queue_depth, sdev->host->can_queue);
1261 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1262 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1263
1264 if (sdev->queue_depth == queue_depth)
1265 return -EINVAL;
1266
1267 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001268 return queue_depth;
1269}
1270
1271/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001272 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1273 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001274 *
1275 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1276 * (to start). Perhaps these commands should be preceded by
1277 * CHECK POWER MODE to see what power mode the device is already in.
1278 * [See SAT revision 5 at www.t10.org]
1279 *
1280 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001281 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001282 *
1283 * RETURNS:
1284 * Zero on success, non-zero on error.
1285 */
Tejun Heoad706992006-12-17 10:45:57 +09001286static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001287{
Tejun Heo542b1442006-12-17 10:45:08 +09001288 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001289 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001290 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001291
Tejun Heo2e5704f2006-12-17 10:46:33 +09001292 if (scmd->cmd_len < 5)
1293 goto invalid_fld;
1294
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001295 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1296 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001297 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001298 ; /* ignore IMMED bit, violates sat-r05 */
1299 }
Tejun Heo542b1442006-12-17 10:45:08 +09001300 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001301 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001302 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001303 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001304
Tejun Heo542b1442006-12-17 10:45:08 +09001305 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001306 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001307
1308 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001309 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001310
1311 tf->lbah = 0x0;
1312 tf->lbam = 0x0;
1313 tf->lbal = 0x0;
1314 tf->device |= ATA_LBA;
1315 } else {
1316 /* CHS */
1317 tf->lbal = 0x1; /* sect */
1318 tf->lbam = 0x0; /* cyl low */
1319 tf->lbah = 0x0; /* cyl high */
1320 }
1321
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001322 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001323 } else {
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001324 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1325 * or S5) causing some drives to spin up and down again.
1326 */
1327 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1328 system_state == SYSTEM_POWER_OFF)
1329 goto skip;
1330
1331 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1332 system_entering_hibernation())
1333 goto skip;
1334
Robert Hancock78981a72007-01-30 00:59:18 -08001335 /* Issue ATA STANDBY IMMEDIATE command */
1336 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001337 }
Robert Hancock78981a72007-01-30 00:59:18 -08001338
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001339 /*
1340 * Standby and Idle condition timers could be implemented but that
1341 * would require libata to implement the Power condition mode page
1342 * and allow the user to change it. Changing mode pages requires
1343 * MODE SELECT to be implemented.
1344 */
1345
1346 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001347
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001348 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001349 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001350 /* "Invalid field in cbd" */
1351 return 1;
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001352 skip:
1353 scmd->result = SAM_STAT_GOOD;
1354 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001355}
1356
1357
1358/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1360 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 *
1362 * Sets up an ATA taskfile to issue FLUSH CACHE or
1363 * FLUSH CACHE EXT.
1364 *
1365 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001366 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 *
1368 * RETURNS:
1369 * Zero on success, non-zero on error.
1370 */
Tejun Heoad706992006-12-17 10:45:57 +09001371static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372{
1373 struct ata_taskfile *tf = &qc->tf;
1374
1375 tf->flags |= ATA_TFLAG_DEVICE;
1376 tf->protocol = ATA_PROT_NODATA;
1377
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001378 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 tf->command = ATA_CMD_FLUSH_EXT;
1380 else
1381 tf->command = ATA_CMD_FLUSH;
1382
Tejun Heob666da32007-10-26 15:53:59 +09001383 /* flush is critical for IO integrity, consider it an IO command */
1384 qc->flags |= ATA_QCFLAG_IO;
1385
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 return 0;
1387}
1388
1389/**
Albert Lee3aef5232005-10-04 08:47:43 -04001390 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001391 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001392 *
1393 * Calculate LBA and transfer length for 6-byte commands.
1394 *
1395 * RETURNS:
1396 * @plba: the LBA
1397 * @plen: the transfer length
1398 */
Tejun Heo542b1442006-12-17 10:45:08 +09001399static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001400{
1401 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001402 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001403
1404 VPRINTK("six-byte command\n");
1405
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001406 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001407 lba |= ((u64)cdb[2]) << 8;
1408 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001409
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001410 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001411
1412 *plba = lba;
1413 *plen = len;
1414}
1415
1416/**
1417 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001418 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001419 *
1420 * Calculate LBA and transfer length for 10-byte commands.
1421 *
1422 * RETURNS:
1423 * @plba: the LBA
1424 * @plen: the transfer length
1425 */
Tejun Heo542b1442006-12-17 10:45:08 +09001426static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001427{
1428 u64 lba = 0;
1429 u32 len = 0;
1430
1431 VPRINTK("ten-byte command\n");
1432
Tejun Heo542b1442006-12-17 10:45:08 +09001433 lba |= ((u64)cdb[2]) << 24;
1434 lba |= ((u64)cdb[3]) << 16;
1435 lba |= ((u64)cdb[4]) << 8;
1436 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001437
Tejun Heo542b1442006-12-17 10:45:08 +09001438 len |= ((u32)cdb[7]) << 8;
1439 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001440
1441 *plba = lba;
1442 *plen = len;
1443}
1444
1445/**
1446 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001447 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001448 *
1449 * Calculate LBA and transfer length for 16-byte commands.
1450 *
1451 * RETURNS:
1452 * @plba: the LBA
1453 * @plen: the transfer length
1454 */
Tejun Heo542b1442006-12-17 10:45:08 +09001455static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001456{
1457 u64 lba = 0;
1458 u32 len = 0;
1459
1460 VPRINTK("sixteen-byte command\n");
1461
Tejun Heo542b1442006-12-17 10:45:08 +09001462 lba |= ((u64)cdb[2]) << 56;
1463 lba |= ((u64)cdb[3]) << 48;
1464 lba |= ((u64)cdb[4]) << 40;
1465 lba |= ((u64)cdb[5]) << 32;
1466 lba |= ((u64)cdb[6]) << 24;
1467 lba |= ((u64)cdb[7]) << 16;
1468 lba |= ((u64)cdb[8]) << 8;
1469 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001470
Tejun Heo542b1442006-12-17 10:45:08 +09001471 len |= ((u32)cdb[10]) << 24;
1472 len |= ((u32)cdb[11]) << 16;
1473 len |= ((u32)cdb[12]) << 8;
1474 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001475
1476 *plba = lba;
1477 *plen = len;
1478}
1479
1480/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1482 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 *
1484 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1485 *
1486 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001487 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 *
1489 * RETURNS:
1490 * Zero on success, non-zero on error.
1491 */
Tejun Heoad706992006-12-17 10:45:57 +09001492static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493{
Tejun Heo542b1442006-12-17 10:45:08 +09001494 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001496 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001498 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001499 u64 block;
1500 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501
1502 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1503 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Tejun Heo2e5704f2006-12-17 10:46:33 +09001505 if (cdb[0] == VERIFY) {
1506 if (scmd->cmd_len < 10)
1507 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001508 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001509 } else if (cdb[0] == VERIFY_16) {
1510 if (scmd->cmd_len < 16)
1511 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001512 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001513 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001514 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515
Albert Lee8bf62ec2005-05-12 15:29:42 -04001516 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001517 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001518 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001519 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001520 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001521 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522
Albert Lee07506692005-10-12 15:04:18 +08001523 if (dev->flags & ATA_DFLAG_LBA) {
1524 tf->flags |= ATA_TFLAG_LBA;
1525
Albert Leec6a33e22005-10-12 15:12:26 +08001526 if (lba_28_ok(block, n_block)) {
1527 /* use LBA28 */
1528 tf->command = ATA_CMD_VERIFY;
1529 tf->device |= (block >> 24) & 0xf;
1530 } else if (lba_48_ok(block, n_block)) {
1531 if (!(dev->flags & ATA_DFLAG_LBA48))
1532 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001533
1534 /* use LBA48 */
1535 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001536 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537
Albert Lee8bf62ec2005-05-12 15:29:42 -04001538 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539
Albert Lee8bf62ec2005-05-12 15:29:42 -04001540 tf->hob_lbah = (block >> 40) & 0xff;
1541 tf->hob_lbam = (block >> 32) & 0xff;
1542 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001543 } else
1544 /* request too large even for LBA48 */
1545 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001546
1547 tf->nsect = n_block & 0xff;
1548
1549 tf->lbah = (block >> 16) & 0xff;
1550 tf->lbam = (block >> 8) & 0xff;
1551 tf->lbal = block & 0xff;
1552
1553 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001555 /* CHS */
1556 u32 sect, head, cyl, track;
1557
Albert Leec6a33e22005-10-12 15:12:26 +08001558 if (!lba_28_ok(block, n_block))
1559 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001560
Albert Lee8bf62ec2005-05-12 15:29:42 -04001561 /* Convert LBA to CHS */
1562 track = (u32)block / dev->sectors;
1563 cyl = track / dev->heads;
1564 head = track % dev->heads;
1565 sect = (u32)block % dev->sectors + 1;
1566
Albert Leec187c4b2005-10-04 08:46:51 -04001567 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1568 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001569
1570 /* Check whether the converted CHS can fit.
1571 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001572 Head: 0-15
1573 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001574 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001575 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001576
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001578 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1579 tf->lbal = sect;
1580 tf->lbam = cyl;
1581 tf->lbah = cyl >> 8;
1582 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 }
1584
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001586
1587invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001588 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001589 /* "Invalid field in cbd" */
1590 return 1;
1591
1592out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001593 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001594 /* "Logical Block Address out of range" */
1595 return 1;
1596
1597nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001598 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001599 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600}
1601
1602/**
1603 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1604 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 *
1606 * Converts any of six SCSI read/write commands into the
1607 * ATA counterpart, including starting sector (LBA),
1608 * sector count, and taking into account the device's LBA48
1609 * support.
1610 *
1611 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1612 * %WRITE_16 are currently supported.
1613 *
1614 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001615 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 *
1617 * RETURNS:
1618 * Zero on success, non-zero on error.
1619 */
Tejun Heoad706992006-12-17 10:45:57 +09001620static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621{
Tejun Heo542b1442006-12-17 10:45:08 +09001622 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001623 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001624 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001625 u64 block;
1626 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001627 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Tejun Heo542b1442006-12-17 10:45:08 +09001629 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001630 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001632 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001633 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001634 case READ_10:
1635 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001636 if (unlikely(scmd->cmd_len < 10))
1637 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001638 scsi_10_lba_len(cdb, &block, &n_block);
1639 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001640 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001641 break;
1642 case READ_6:
1643 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001644 if (unlikely(scmd->cmd_len < 6))
1645 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001646 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001647
1648 /* for 6-byte r/w commands, transfer length 0
1649 * means 256 blocks of data, not 0 block.
1650 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001651 if (!n_block)
1652 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001653 break;
1654 case READ_16:
1655 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001656 if (unlikely(scmd->cmd_len < 16))
1657 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001658 scsi_16_lba_len(cdb, &block, &n_block);
1659 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001660 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001661 break;
1662 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001663 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001664 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 }
1666
Albert Lee8bf62ec2005-05-12 15:29:42 -04001667 /* Check and compose ATA command */
1668 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001669 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1670 * length 0 means transfer 0 block of data.
1671 * However, for ATA R/W commands, sector count 0 means
1672 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001673 *
1674 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001675 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001676 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001677
Tejun Heobd056d72006-11-14 22:47:10 +09001678 qc->flags |= ATA_QCFLAG_IO;
Grant Grundler295124d2010-08-17 10:56:53 -07001679 qc->nbytes = n_block * scmd->device->sector_size;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001680
Tejun Heobd056d72006-11-14 22:47:10 +09001681 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1682 qc->tag);
1683 if (likely(rc == 0))
1684 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001685
Tejun Heobd056d72006-11-14 22:47:10 +09001686 if (rc == -ERANGE)
1687 goto out_of_range;
1688 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001689invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001690 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001691 /* "Invalid field in cbd" */
1692 return 1;
1693
1694out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001695 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001696 /* "Logical Block Address out of range" */
1697 return 1;
1698
1699nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001700 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001701 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702}
1703
Tejun Heo77853bf2006-01-23 13:09:36 +09001704static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705{
Tejun Heoc31f5712006-11-22 12:39:43 +09001706 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001708 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001709 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710
Jeff Garzikb0955182005-05-12 15:45:22 -04001711 /* For ATA pass thru (SAT) commands, generate a sense block if
1712 * user mandated it or if there's an error. Note that if we
1713 * generate because the user forced us to, a check condition
1714 * is generated and the ATA register values are returned
1715 * whether the command completed successfully or not. If there
1716 * was no error, SK, ASC and ASCQ will all be zero.
1717 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001718 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001719 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001720 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001721 } else {
1722 if (!need_sense) {
1723 cmd->result = SAM_STAT_GOOD;
1724 } else {
1725 /* TODO: decide which descriptor format to use
1726 * for 48b LBA devices and call that here
1727 * instead of the fixed desc, which is only
1728 * good for smaller LBA (and maybe CHS?)
1729 * devices.
1730 */
Tejun Heo750426a2006-11-14 22:37:35 +09001731 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001732 }
1733 }
1734
Tejun Heoc31f5712006-11-22 12:39:43 +09001735 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001736 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
1738 qc->scsidone(cmd);
1739
Tejun Heo77853bf2006-01-23 13:09:36 +09001740 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741}
1742
1743/**
1744 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 * @dev: ATA device to which the command is addressed
1746 * @cmd: SCSI command to execute
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1748 *
1749 * Our ->queuecommand() function has decided that the SCSI
1750 * command issued can be directly translated into an ATA
1751 * command, rather than handled internally.
1752 *
1753 * This function sets up an ata_queued_cmd structure for the
1754 * SCSI command, and sends that ata_queued_cmd to the hardware.
1755 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001756 * The xlat_func argument (actor) returns 0 if ready to execute
1757 * ATA command, else 1 to finish translation. If 1 is returned
1758 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1759 * to be set reflecting an error condition or clean (early)
1760 * termination.
1761 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001763 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001764 *
1765 * RETURNS:
1766 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1767 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001769static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09001770 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001772 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001774 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
1776 VPRINTK("ENTER\n");
1777
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05001778 qc = ata_scsi_qc_new(dev, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001780 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781
1782 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001783 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1784 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001785 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001786 ata_dev_printk(dev, KERN_WARNING,
1787 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001788 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 }
1790
Boaz Harrosh71201652007-09-18 17:48:50 +02001791 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792
1793 qc->dma_dir = cmd->sc_data_direction;
1794 }
1795
1796 qc->complete_fn = ata_scsi_qc_complete;
1797
Tejun Heoad706992006-12-17 10:45:57 +09001798 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001799 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800
Tejun Heo31cc23b2007-09-23 13:14:12 +09001801 if (ap->ops->qc_defer) {
1802 if ((rc = ap->ops->qc_defer(qc)))
1803 goto defer;
1804 }
1805
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001807 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
1809 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001810 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811
Douglas Gilbertae006512005-10-09 09:09:35 -04001812early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001813 ata_qc_free(qc);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05001814 cmd->scsi_done(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001815 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001816 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001817
1818err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001820 cmd->result = (DID_ERROR << 16);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05001821 cmd->scsi_done(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001822err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001823 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001824 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001825
1826defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001827 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001828 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001829 if (rc == ATA_DEFER_LINK)
1830 return SCSI_MLQUEUE_DEVICE_BUSY;
1831 else
1832 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833}
1834
1835/**
1836 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001837 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001838 * @flags: unsigned long variable to store irq enable status
1839 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 *
Tejun Heo87340e92008-04-28 17:48:51 +09001841 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 *
1843 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001844 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 *
1846 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001847 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 */
Tejun Heo87340e92008-04-28 17:48:51 +09001849static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1850 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851{
Tejun Heo87340e92008-04-28 17:48:51 +09001852 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
Tejun Heo87340e92008-04-28 17:48:51 +09001854 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1855 if (copy_in)
1856 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1857 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1858 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859}
1860
1861/**
1862 * ata_scsi_rbuf_put - Unmap response buffer.
1863 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001864 * @copy_out: copy out result
1865 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 *
Tejun Heo87340e92008-04-28 17:48:51 +09001867 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1868 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 *
1870 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001871 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 */
Tejun Heo87340e92008-04-28 17:48:51 +09001873static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1874 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875{
Tejun Heo87340e92008-04-28 17:48:51 +09001876 if (copy_out)
1877 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1878 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1879 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880}
1881
1882/**
1883 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1884 * @args: device IDENTIFY data / SCSI command of interest.
1885 * @actor: Callback hook for desired SCSI command simulator
1886 *
1887 * Takes care of the hard work of simulating a SCSI command...
1888 * Mapping the response buffer, calling the command's handler,
1889 * and handling the handler's return value. This return value
1890 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001891 * completed successfully (0), or not (in which case cmd->result
1892 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 *
1894 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001895 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 */
Tejun Heof0761be2008-04-28 17:16:52 +09001897static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001898 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899{
1900 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001901 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001903 unsigned long flags;
1904
Tejun Heo87340e92008-04-28 17:48:51 +09001905 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1906 rc = actor(args, rbuf);
1907 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001908
Douglas Gilbertae006512005-10-09 09:09:35 -04001909 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001911 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912}
1913
1914/**
1915 * ata_scsiop_inq_std - Simulate INQUIRY command
1916 * @args: device IDENTIFY data / SCSI command of interest.
1917 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 *
1919 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001920 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 *
1922 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001923 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 */
Tejun Heo87340e92008-04-28 17:48:51 +09001925static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926{
Tejun Heo87340e92008-04-28 17:48:51 +09001927 const u8 versions[] = {
1928 0x60, /* SAM-3 (no version claimed) */
1929
1930 0x03,
1931 0x20, /* SBC-2 (no version claimed) */
1932
1933 0x02,
1934 0x60 /* SPC-3 (no version claimed) */
1935 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 u8 hdr[] = {
1937 TYPE_DISK,
1938 0,
1939 0x5, /* claim SPC-3 version compatibility */
1940 2,
1941 95 - 4
1942 };
1943
Tejun Heo87340e92008-04-28 17:48:51 +09001944 VPRINTK("ENTER\n");
1945
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 /* set scsi removeable (RMB) bit per ata bit */
1947 if (ata_id_removeable(args->id))
1948 hdr[1] |= (1 << 7);
1949
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001951 memcpy(&rbuf[8], "ATA ", 8);
1952 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1953 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954
Tejun Heo87340e92008-04-28 17:48:51 +09001955 if (rbuf[32] == 0 || rbuf[32] == ' ')
1956 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957
Tejun Heo87340e92008-04-28 17:48:51 +09001958 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959
1960 return 0;
1961}
1962
1963/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001964 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 * @args: device IDENTIFY data / SCSI command of interest.
1966 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001968 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 *
1970 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001971 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972 */
Tejun Heo87340e92008-04-28 17:48:51 +09001973static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974{
1975 const u8 pages[] = {
1976 0x00, /* page 0x00, this page */
1977 0x80, /* page 0x80, unit serial no page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001978 0x83, /* page 0x83, device ident page */
1979 0x89, /* page 0x89, ata info page */
Christoph Hellwig18f0f972009-11-17 10:00:47 -05001980 0xb0, /* page 0xb0, block limits page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001981 0xb1, /* page 0xb1, block device characteristics page */
Martin K. Petersen02e0a602010-09-10 01:23:18 -04001982 0xb2, /* page 0xb2, thin provisioning page */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 };
Tejun Heo87340e92008-04-28 17:48:51 +09001984
Jeff Garzikb142eb62006-03-21 20:37:47 -05001985 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09001986 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 return 0;
1988}
1989
1990/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001991 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 * @args: device IDENTIFY data / SCSI command of interest.
1993 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 *
1995 * Returns ATA device serial number.
1996 *
1997 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001998 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 */
Tejun Heo87340e92008-04-28 17:48:51 +09002000static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001{
2002 const u8 hdr[] = {
2003 0,
2004 0x80, /* this page code */
2005 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09002006 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 };
Tejun Heo87340e92008-04-28 17:48:51 +09002008
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09002010 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2011 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 return 0;
2013}
2014
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002016 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 * @args: device IDENTIFY data / SCSI command of interest.
2018 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05002020 * Yields two logical unit device identification designators:
2021 * - vendor specific ASCII containing the ATA serial number
2022 * - SAT defined "t10 vendor id based" containing ASCII vendor
2023 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 *
2025 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002026 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 */
Tejun Heo87340e92008-04-28 17:48:51 +09002028static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029{
Jeff Garzikb142eb62006-03-21 20:37:47 -05002030 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09002031 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05002032
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05002034 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035
Tejun Heo87340e92008-04-28 17:48:51 +09002036 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2037 rbuf[num + 0] = 2;
2038 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2039 num += 4;
2040 ata_id_string(args->id, (unsigned char *) rbuf + num,
2041 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2042 num += ATA_ID_SERNO_LEN;
2043
2044 /* SAT defined lu model and serial numbers descriptor */
2045 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2046 rbuf[num + 0] = 2;
2047 rbuf[num + 1] = 1;
2048 rbuf[num + 3] = sat_model_serial_desc_len;
2049 num += 4;
2050 memcpy(rbuf + num, "ATA ", 8);
2051 num += 8;
2052 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2053 ATA_ID_PROD_LEN);
2054 num += ATA_ID_PROD_LEN;
2055 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2056 ATA_ID_SERNO_LEN);
2057 num += ATA_ID_SERNO_LEN;
2058
Hannes Reinecke6b3b9d72011-03-07 08:56:44 +01002059 if (ata_id_has_wwn(args->id)) {
2060 /* SAT defined lu world wide name */
2061 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2062 rbuf[num + 0] = 1;
2063 rbuf[num + 1] = 3;
2064 rbuf[num + 3] = ATA_ID_WWN_LEN;
2065 num += 4;
2066 ata_id_string(args->id, (unsigned char *) rbuf + num,
2067 ATA_ID_WWN, ATA_ID_WWN_LEN);
2068 num += ATA_ID_WWN_LEN;
2069 }
Jeff Garzikb142eb62006-03-21 20:37:47 -05002070 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 return 0;
2072}
2073
2074/**
Jeff Garzikad355b42007-09-21 20:38:03 -04002075 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2076 * @args: device IDENTIFY data / SCSI command of interest.
2077 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04002078 *
2079 * Yields SAT-specified ATA VPD page.
2080 *
2081 * LOCKING:
2082 * spin_lock_irqsave(host lock)
2083 */
Tejun Heo87340e92008-04-28 17:48:51 +09002084static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04002085{
Jeff Garzikad355b42007-09-21 20:38:03 -04002086 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04002087
Jeff Garzikad355b42007-09-21 20:38:03 -04002088 memset(&tf, 0, sizeof(tf));
2089
Tejun Heo87340e92008-04-28 17:48:51 +09002090 rbuf[1] = 0x89; /* our page code */
2091 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2092 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04002093
Tejun Heo87340e92008-04-28 17:48:51 +09002094 memcpy(&rbuf[8], "linux ", 8);
2095 memcpy(&rbuf[16], "libata ", 16);
2096 memcpy(&rbuf[32], DRV_VERSION, 4);
2097 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04002098
2099 /* we don't store the ATA device signature, so we fake it */
2100
2101 tf.command = ATA_DRDY; /* really, this is Status reg */
2102 tf.lbal = 0x1;
2103 tf.nsect = 0x1;
2104
Tejun Heo87340e92008-04-28 17:48:51 +09002105 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2106 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04002107
Tejun Heo87340e92008-04-28 17:48:51 +09002108 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04002109
Tejun Heo87340e92008-04-28 17:48:51 +09002110 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04002111 return 0;
2112}
2113
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002114static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2115{
Grant Grundler295124d2010-08-17 10:56:53 -07002116 u16 min_io_sectors;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002117
2118 rbuf[1] = 0xb0;
2119 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2120
2121 /*
2122 * Optimal transfer length granularity.
2123 *
2124 * This is always one physical block, but for disks with a smaller
2125 * logical than physical sector size we need to figure out what the
2126 * latter is.
2127 */
Grant Grundler295124d2010-08-17 10:56:53 -07002128 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002129 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2130
2131 /*
2132 * Optimal unmap granularity.
2133 *
2134 * The ATA spec doesn't even know about a granularity or alignment
2135 * for the TRIM command. We can leave away most of the unmap related
2136 * VPD page entries, but we have specifify a granularity to signal
2137 * that we support some form of unmap - in thise case via WRITE SAME
2138 * with the unmap bit set.
2139 */
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002140 if (ata_id_has_trim(args->id)) {
2141 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002142 put_unaligned_be32(1, &rbuf[28]);
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002143 }
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002144
2145 return 0;
2146}
2147
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002148static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2149{
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002150 int form_factor = ata_id_form_factor(args->id);
2151 int media_rotation_rate = ata_id_rotation_rate(args->id);
2152
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002153 rbuf[1] = 0xb1;
2154 rbuf[3] = 0x3c;
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002155 rbuf[4] = media_rotation_rate >> 8;
2156 rbuf[5] = media_rotation_rate;
2157 rbuf[7] = form_factor;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002158
2159 return 0;
2160}
2161
Martin K. Petersen02e0a602010-09-10 01:23:18 -04002162static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2163{
2164 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2165 rbuf[1] = 0xb2;
2166 rbuf[3] = 0x4;
2167 rbuf[5] = 1 << 6; /* TPWS */
2168
2169 return 0;
2170}
2171
Jeff Garzikad355b42007-09-21 20:38:03 -04002172/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002173 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174 * @args: device IDENTIFY data / SCSI command of interest.
2175 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 *
2177 * No operation. Simply returns success to caller, to indicate
2178 * that the caller should successfully complete this SCSI command.
2179 *
2180 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002181 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 */
Tejun Heo87340e92008-04-28 17:48:51 +09002183static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184{
2185 VPRINTK("ENTER\n");
2186 return 0;
2187}
2188
2189/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 * ata_msense_caching - Simulate MODE SENSE caching info page
2191 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09002192 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 *
2194 * Generate a caching info page, which conditionally indicates
2195 * write caching to the SCSI layer, depending on device
2196 * capabilities.
2197 *
2198 * LOCKING:
2199 * None.
2200 */
Tejun Heo87340e92008-04-28 17:48:51 +09002201static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202{
Tejun Heo87340e92008-04-28 17:48:51 +09002203 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002205 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002207 buf[12] |= (1 << 5); /* disable read ahead */
2208 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209}
2210
2211/**
2212 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09002213 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 *
2215 * Generate a generic MODE SENSE control mode page.
2216 *
2217 * LOCKING:
2218 * None.
2219 */
Tejun Heo87340e92008-04-28 17:48:51 +09002220static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221{
Tejun Heo87340e92008-04-28 17:48:51 +09002222 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002223 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224}
2225
2226/**
2227 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07002228 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 *
2230 * Generate a generic MODE SENSE r/w error recovery page.
2231 *
2232 * LOCKING:
2233 * None.
2234 */
Tejun Heo87340e92008-04-28 17:48:51 +09002235static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236{
Tejun Heo87340e92008-04-28 17:48:51 +09002237 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002238 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239}
2240
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002241/*
2242 * We can turn this into a real blacklist if it's needed, for now just
2243 * blacklist any Maxtor BANC1G10 revision firmware
2244 */
2245static int ata_dev_supports_fua(u16 *id)
2246{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002247 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002248
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002249 if (!libata_fua)
2250 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002251 if (!ata_id_has_fua(id))
2252 return 0;
2253
Tejun Heoa0cf7332007-01-02 20:18:49 +09002254 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2255 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002256
Tejun Heo2e026712006-02-12 22:47:04 +09002257 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002258 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002259 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002260 return 1;
2261
2262 return 0; /* blacklisted */
2263}
2264
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265/**
2266 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2267 * @args: device IDENTIFY data / SCSI command of interest.
2268 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002270 * Simulate MODE SENSE commands. Assume this is invoked for direct
2271 * access devices (e.g. disks) only. There should be no block
2272 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 *
2274 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002275 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 */
Tejun Heo87340e92008-04-28 17:48:51 +09002277static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002279 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002280 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002281 const u8 sat_blk_desc[] = {
2282 0, 0, 0, 0, /* number of blocks: sat unspecified */
2283 0,
2284 0, 0x2, 0x0 /* block length: 512 bytes */
2285 };
2286 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002287 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002288 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289
2290 VPRINTK("ENTER\n");
2291
2292 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002293 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2294 /*
2295 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002297
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002299 switch (page_control) {
2300 case 0: /* current */
2301 break; /* supported */
2302 case 3: /* saved */
2303 goto saving_not_supp;
2304 case 1: /* changeable */
2305 case 2: /* defaults */
2306 default:
2307 goto invalid_fld;
2308 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309
Tejun Heo87340e92008-04-28 17:48:51 +09002310 if (six_byte)
2311 p += 4 + (ebd ? 8 : 0);
2312 else
2313 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002315 pg = scsicmd[2] & 0x3f;
2316 spg = scsicmd[3];
2317 /*
2318 * No mode subpages supported (yet) but asking for _all_
2319 * subpages may be valid
2320 */
2321 if (spg && (spg != ALL_SUB_MPAGES))
2322 goto invalid_fld;
2323
2324 switch(pg) {
2325 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002326 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 break;
2328
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002329 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002330 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 break;
2332
Tejun Heo87340e92008-04-28 17:48:51 +09002333 case CONTROL_MPAGE:
2334 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002337 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002338 p += ata_msense_rw_recovery(p);
2339 p += ata_msense_caching(args->id, p);
2340 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341 break;
2342
2343 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002344 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 }
2346
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002347 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002348 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002349 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2350 dpofua = 1 << 4;
2351
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002353 rbuf[0] = p - rbuf - 1;
2354 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002355 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002356 rbuf[3] = sizeof(sat_blk_desc);
2357 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002358 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002360 unsigned int output_len = p - rbuf - 2;
2361
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002363 rbuf[1] = output_len;
2364 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002365 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002366 rbuf[7] = sizeof(sat_blk_desc);
2367 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002368 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002371
2372invalid_fld:
2373 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2374 /* "Invalid field in cbd" */
2375 return 1;
2376
2377saving_not_supp:
2378 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2379 /* "Saving parameters not supported" */
2380 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381}
2382
2383/**
2384 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2385 * @args: device IDENTIFY data / SCSI command of interest.
2386 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 *
2388 * Simulate READ CAPACITY commands.
2389 *
2390 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002391 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 */
Tejun Heo87340e92008-04-28 17:48:51 +09002393static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394{
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002395 struct ata_device *dev = args->dev;
2396 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
Grant Grundler295124d2010-08-17 10:56:53 -07002397 u32 sector_size; /* physical sector size in bytes */
2398 u8 log2_per_phys;
2399 u16 lowest_aligned;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002400
Grant Grundler295124d2010-08-17 10:56:53 -07002401 sector_size = ata_id_logical_sector_size(dev->id);
2402 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2403 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404
2405 VPRINTK("ENTER\n");
2406
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002408 if (last_lba >= 0xffffffffULL)
2409 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002410
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002412 rbuf[0] = last_lba >> (8 * 3);
2413 rbuf[1] = last_lba >> (8 * 2);
2414 rbuf[2] = last_lba >> (8 * 1);
2415 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416
2417 /* sector size */
Grant Grundler295124d2010-08-17 10:56:53 -07002418 rbuf[4] = sector_size >> (8 * 3);
2419 rbuf[5] = sector_size >> (8 * 2);
2420 rbuf[6] = sector_size >> (8 * 1);
2421 rbuf[7] = sector_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422 } else {
2423 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002424 rbuf[0] = last_lba >> (8 * 7);
2425 rbuf[1] = last_lba >> (8 * 6);
2426 rbuf[2] = last_lba >> (8 * 5);
2427 rbuf[3] = last_lba >> (8 * 4);
2428 rbuf[4] = last_lba >> (8 * 3);
2429 rbuf[5] = last_lba >> (8 * 2);
2430 rbuf[6] = last_lba >> (8 * 1);
2431 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432
2433 /* sector size */
Grant Grundler295124d2010-08-17 10:56:53 -07002434 rbuf[ 8] = sector_size >> (8 * 3);
2435 rbuf[ 9] = sector_size >> (8 * 2);
2436 rbuf[10] = sector_size >> (8 * 1);
2437 rbuf[11] = sector_size;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002438
2439 rbuf[12] = 0;
Grant Grundler295124d2010-08-17 10:56:53 -07002440 rbuf[13] = log2_per_phys;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002441 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2442 rbuf[15] = lowest_aligned;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002443
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002444 if (ata_id_has_trim(args->id)) {
2445 rbuf[14] |= 0x80; /* TPE */
2446
2447 if (ata_id_has_zero_after_trim(args->id))
2448 rbuf[14] |= 0x40; /* TPRZ */
2449 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450 }
2451
2452 return 0;
2453}
2454
2455/**
2456 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2457 * @args: device IDENTIFY data / SCSI command of interest.
2458 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 *
2460 * Simulate REPORT LUNS command.
2461 *
2462 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002463 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464 */
Tejun Heo87340e92008-04-28 17:48:51 +09002465static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002466{
2467 VPRINTK("ENTER\n");
2468 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2469
2470 return 0;
2471}
2472
Tejun Heo77853bf2006-01-23 13:09:36 +09002473static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002474{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002475 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002476 /* FIXME: not quite right; we don't want the
2477 * translation of taskfile registers into
2478 * a sense descriptors, since that's only
2479 * correct for ATA, not ATAPI
2480 */
Tejun Heo750426a2006-11-14 22:37:35 +09002481 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002482 }
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002483
2484 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002485 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002486}
2487
2488/* is it pointless to prefer PIO for "safety reasons"? */
2489static inline int ata_pio_use_silly(struct ata_port *ap)
2490{
2491 return (ap->flags & ATA_FLAG_PIO_DMA);
2492}
2493
2494static void atapi_request_sense(struct ata_queued_cmd *qc)
2495{
2496 struct ata_port *ap = qc->ap;
2497 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002498
2499 DPRINTK("ATAPI request sense\n");
2500
Jeff Garzika939c962005-10-05 17:09:16 -04002501 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002502 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002503
Tejun Heo127102a2008-04-07 22:47:21 +09002504#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002505 if (ap->ops->sff_tf_read)
2506 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002507#endif
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002508
2509 /* fill these in, for the case where they are -not- overwritten */
2510 cmd->sense_buffer[0] = 0x70;
2511 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2512
2513 ata_qc_reinit(qc);
2514
Tejun Heo93f8fec2007-12-05 16:43:01 +09002515 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002516 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002517 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002518 qc->dma_dir = DMA_FROM_DEVICE;
2519
Tejun Heo6e7846e2006-02-12 23:32:58 +09002520 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002521 qc->cdb[0] = REQUEST_SENSE;
2522 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2523
2524 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2525 qc->tf.command = ATA_CMD_PACKET;
2526
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002527 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002528 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002529 qc->tf.feature |= ATAPI_PKT_DMA;
2530 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002531 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002532 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2533 qc->tf.lbah = 0;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002534 }
Jeff Garzika939c962005-10-05 17:09:16 -04002535 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2536
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002537 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002538
Tejun Heo8e0e6942006-03-31 20:41:11 +09002539 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002540
2541 DPRINTK("EXIT\n");
2542}
2543
Tejun Heo77853bf2006-01-23 13:09:36 +09002544static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545{
2546 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002547 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548
Jeff Garzika7dac442005-10-30 04:44:42 -05002549 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002550
Tejun Heo246619d2006-05-15 20:58:16 +09002551 /* handle completion from new EH */
2552 if (unlikely(qc->ap->ops->error_handler &&
2553 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2554
2555 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2556 /* FIXME: not quite right; we don't want the
2557 * translation of taskfile registers into a
2558 * sense descriptors, since that's only
2559 * correct for ATA, not ATAPI
2560 */
Tejun Heo750426a2006-11-14 22:37:35 +09002561 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002562 }
2563
Tejun Heo22aac082006-08-08 14:08:59 +09002564 /* SCSI EH automatically locks door if sdev->locked is
2565 * set. Sometimes door lock request continues to
2566 * fail, for example, when no media is present. This
2567 * creates a loop - SCSI EH issues door lock which
2568 * fails and gets invoked again to acquire sense data
2569 * for the failed command.
2570 *
2571 * If door lock fails, always clear sdev->locked to
2572 * avoid this infinite loop.
Tejun Heo2a5f07b2010-11-01 11:39:19 +01002573 *
2574 * This may happen before SCSI scan is complete. Make
2575 * sure qc->dev->sdev isn't NULL before dereferencing.
Tejun Heo22aac082006-08-08 14:08:59 +09002576 */
Tejun Heo2a5f07b2010-11-01 11:39:19 +01002577 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
Tejun Heo22aac082006-08-08 14:08:59 +09002578 qc->dev->sdev->locked = 0;
2579
Tejun Heo246619d2006-05-15 20:58:16 +09002580 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2581 qc->scsidone(cmd);
2582 ata_qc_free(qc);
2583 return;
2584 }
2585
2586 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002587 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002588 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002589 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002590 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002591 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002592 /* FIXME: not quite right; we don't want the
2593 * translation of taskfile registers into
2594 * a sense descriptors, since that's only
2595 * correct for ATA, not ATAPI
2596 */
Tejun Heo750426a2006-11-14 22:37:35 +09002597 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002598 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 u8 *scsicmd = cmd->cmnd;
2600
Tony Battersbyfd71da42005-12-21 16:35:44 -05002601 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002602 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002603 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002604
Tejun Heo87340e92008-04-28 17:48:51 +09002605 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002606
2607 /* ATAPI devices typically report zero for their SCSI version,
2608 * and sometimes deviate from the spec WRT response data
2609 * format. If SCSI version is reported as zero like normal,
2610 * then we make the following fixups: 1) Fake MMC-5 version,
2611 * to indicate to the Linux scsi midlayer this is a modern
2612 * device. 2) Ensure response data format / ATAPI information
2613 * are always correct.
2614 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002615 if (buf[2] == 0) {
2616 buf[2] = 0x5;
2617 buf[3] = 0x32;
2618 }
2619
Tejun Heo87340e92008-04-28 17:48:51 +09002620 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002622
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623 cmd->result = SAM_STAT_GOOD;
2624 }
2625
2626 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002627 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628}
2629/**
2630 * atapi_xlat - Initialize PACKET taskfile
2631 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632 *
2633 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002634 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635 *
2636 * RETURNS:
2637 * Zero on success, non-zero on failure.
2638 */
Tejun Heoad706992006-12-17 10:45:57 +09002639static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640{
Tejun Heo542b1442006-12-17 10:45:08 +09002641 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002643 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002644 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002645 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002646
Tejun Heo2e5704f2006-12-17 10:46:33 +09002647 memset(qc->cdb, 0, dev->cdb_len);
2648 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649
2650 qc->complete_fn = atapi_qc_complete;
2651
2652 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002653 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654 qc->tf.flags |= ATA_TFLAG_WRITE;
2655 DPRINTK("direction: write\n");
2656 }
2657
2658 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002659 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002660
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002661 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002662 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002663 using_pio = 1;
2664
Tejun Heoe1902222007-11-26 20:58:02 +09002665 /* Some controller variants snoop this value for Packet
2666 * transfers to do state machine and FIFO management. Thus we
2667 * want to set it properly, and for DMA where it is
2668 * effectively meaningless.
2669 */
Tejun Heoaacda372008-03-18 17:47:43 +09002670 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002671
Tejun Heoe1902222007-11-26 20:58:02 +09002672 /* Most ATAPI devices which honor transfer chunk size don't
2673 * behave according to the spec when odd chunk size which
2674 * matches the transfer length is specified. If the number of
2675 * bytes to transfer is 2n+1. According to the spec, what
2676 * should happen is to indicate that 2n+1 is going to be
2677 * transferred and transfer 2n+2 bytes where the last byte is
2678 * padding.
2679 *
2680 * In practice, this doesn't happen. ATAPI devices first
2681 * indicate and transfer 2n bytes and then indicate and
2682 * transfer 2 bytes where the last byte is padding.
2683 *
2684 * This inconsistency confuses several controllers which
2685 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2686 * These controllers use actual number of transferred bytes to
2687 * update DMA poitner and transfer of 4n+2 bytes make those
2688 * controller push DMA pointer by 4n+4 bytes because SATA data
2689 * FISes are aligned to 4 bytes. This causes data corruption
2690 * and buffer overrun.
2691 *
2692 * Always setting nbytes to even number solves this problem
2693 * because then ATAPI devices don't have to split data at 2n
2694 * boundaries.
2695 */
2696 if (nbytes & 0x1)
2697 nbytes++;
2698
Alan Cox2db78dd2007-10-02 13:53:04 -07002699 qc->tf.lbam = (nbytes & 0xFF);
2700 qc->tf.lbah = (nbytes >> 8);
2701
Tejun Heo5895ef92008-06-17 12:36:26 +09002702 if (nodata)
2703 qc->tf.protocol = ATAPI_PROT_NODATA;
2704 else if (using_pio)
2705 qc->tf.protocol = ATAPI_PROT_PIO;
2706 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002707 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002708 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709 qc->tf.feature |= ATAPI_PKT_DMA;
2710
Tejun Heo91163002008-02-21 13:25:50 +09002711 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2712 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002713 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002714 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 }
2716
Alan Cox2db78dd2007-10-02 13:53:04 -07002717
2718 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2719 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720 return 0;
2721}
2722
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002723static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002724{
Tejun Heo071f44b2008-04-07 22:47:22 +09002725 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002726 if (likely(devno < ata_link_max_devices(&ap->link)))
2727 return &ap->link.device[devno];
2728 } else {
2729 if (likely(devno < ap->nr_pmp_links))
2730 return &ap->pmp_link[devno].device[0];
2731 }
2732
Tejun Heoab5b3a52006-05-31 18:27:34 +09002733 return NULL;
2734}
2735
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002736static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2737 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002738{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002739 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002740
Tejun Heo41bda9c2007-08-06 18:36:24 +09002741 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002742 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002743 if (unlikely(scsidev->channel || scsidev->lun))
2744 return NULL;
2745 devno = scsidev->id;
2746 } else {
2747 if (unlikely(scsidev->id || scsidev->lun))
2748 return NULL;
2749 devno = scsidev->channel;
2750 }
2751
2752 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002753}
2754
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755/**
2756 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2757 * @ap: ATA port to which the device is attached
2758 * @scsidev: SCSI device from which we derive the ATA device
2759 *
2760 * Given various information provided in struct scsi_cmnd,
2761 * map that onto an ATA bus, and using that mapping
2762 * determine which ata_device is associated with the
2763 * SCSI command to be sent.
2764 *
2765 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002766 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 *
2768 * RETURNS:
2769 * Associated ATA device, or %NULL if not found.
2770 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002772ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002774 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002775
Tejun Heo2486fa52008-07-31 07:52:40 +09002776 if (unlikely(!dev || !ata_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002777 return NULL;
2778
Linus Torvalds1da177e2005-04-16 15:20:36 -07002779 return dev;
2780}
2781
Jeff Garzikb0955182005-05-12 15:45:22 -04002782/*
2783 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2784 * @byte1: Byte 1 from pass-thru CDB.
2785 *
2786 * RETURNS:
2787 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2788 */
2789static u8
2790ata_scsi_map_proto(u8 byte1)
2791{
2792 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002793 case 3: /* Non-data */
2794 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002795
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002796 case 6: /* DMA */
2797 case 10: /* UDMA Data-in */
2798 case 11: /* UDMA Data-Out */
2799 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002800
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002801 case 4: /* PIO Data-in */
2802 case 5: /* PIO Data-out */
2803 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002804
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002805 case 0: /* Hard Reset */
2806 case 1: /* SRST */
2807 case 8: /* Device Diagnostic */
2808 case 9: /* Device Reset */
2809 case 7: /* DMA Queued */
2810 case 12: /* FPDMA */
2811 case 15: /* Return Response Info */
2812 default: /* Reserved */
2813 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002814 }
2815
2816 return ATA_PROT_UNKNOWN;
2817}
2818
2819/**
2820 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2821 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002822 *
2823 * Handles either 12 or 16-byte versions of the CDB.
2824 *
2825 * RETURNS:
2826 * Zero on success, non-zero on failure.
2827 */
Tejun Heoad706992006-12-17 10:45:57 +09002828static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002829{
2830 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002831 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002832 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002833 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002834
Tejun Heo542b1442006-12-17 10:45:08 +09002835 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002836 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002837
Alan Coxae8d4ee2007-11-04 22:05:49 -05002838 /*
Jeff Garzikb0955182005-05-12 15:45:22 -04002839 * 12 and 16 byte CDBs use different offsets to
2840 * provide the various register values.
2841 */
Tejun Heo542b1442006-12-17 10:45:08 +09002842 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002843 /*
2844 * 16-byte CDB - may contain extended commands.
2845 *
2846 * If that is the case, copy the upper byte register values.
2847 */
Tejun Heo542b1442006-12-17 10:45:08 +09002848 if (cdb[1] & 0x01) {
2849 tf->hob_feature = cdb[3];
2850 tf->hob_nsect = cdb[5];
2851 tf->hob_lbal = cdb[7];
2852 tf->hob_lbam = cdb[9];
2853 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002854 tf->flags |= ATA_TFLAG_LBA48;
2855 } else
2856 tf->flags &= ~ATA_TFLAG_LBA48;
2857
2858 /*
2859 * Always copy low byte, device and command registers.
2860 */
Tejun Heo542b1442006-12-17 10:45:08 +09002861 tf->feature = cdb[4];
2862 tf->nsect = cdb[6];
2863 tf->lbal = cdb[8];
2864 tf->lbam = cdb[10];
2865 tf->lbah = cdb[12];
2866 tf->device = cdb[13];
2867 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002868 } else {
2869 /*
2870 * 12-byte CDB - incapable of extended commands.
2871 */
2872 tf->flags &= ~ATA_TFLAG_LBA48;
2873
Tejun Heo542b1442006-12-17 10:45:08 +09002874 tf->feature = cdb[3];
2875 tf->nsect = cdb[4];
2876 tf->lbal = cdb[5];
2877 tf->lbam = cdb[6];
2878 tf->lbah = cdb[7];
2879 tf->device = cdb[8];
2880 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002881 }
Albert Leefa4453c2007-06-07 15:52:07 +08002882
2883 /* enforce correct master/slave bit */
2884 tf->device = dev->devno ?
2885 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002886
Tejun Heobd30add2009-09-03 16:08:11 +09002887 switch (tf->command) {
Grant Grundler295124d2010-08-17 10:56:53 -07002888 /* READ/WRITE LONG use a non-standard sect_size */
Tejun Heobd30add2009-09-03 16:08:11 +09002889 case ATA_CMD_READ_LONG:
2890 case ATA_CMD_READ_LONG_ONCE:
2891 case ATA_CMD_WRITE_LONG:
2892 case ATA_CMD_WRITE_LONG_ONCE:
2893 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2894 goto invalid_fld;
2895 qc->sect_size = scsi_bufflen(scmd);
Grant Grundler295124d2010-08-17 10:56:53 -07002896 break;
2897
2898 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2899 case ATA_CMD_CFA_WRITE_NE:
2900 case ATA_CMD_CFA_TRANS_SECT:
2901 case ATA_CMD_CFA_WRITE_MULT_NE:
2902 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2903 case ATA_CMD_READ:
2904 case ATA_CMD_READ_EXT:
2905 case ATA_CMD_READ_QUEUED:
2906 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2907 case ATA_CMD_FPDMA_READ:
2908 case ATA_CMD_READ_MULTI:
2909 case ATA_CMD_READ_MULTI_EXT:
2910 case ATA_CMD_PIO_READ:
2911 case ATA_CMD_PIO_READ_EXT:
2912 case ATA_CMD_READ_STREAM_DMA_EXT:
2913 case ATA_CMD_READ_STREAM_EXT:
2914 case ATA_CMD_VERIFY:
2915 case ATA_CMD_VERIFY_EXT:
2916 case ATA_CMD_WRITE:
2917 case ATA_CMD_WRITE_EXT:
2918 case ATA_CMD_WRITE_FUA_EXT:
2919 case ATA_CMD_WRITE_QUEUED:
2920 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2921 case ATA_CMD_FPDMA_WRITE:
2922 case ATA_CMD_WRITE_MULTI:
2923 case ATA_CMD_WRITE_MULTI_EXT:
2924 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2925 case ATA_CMD_PIO_WRITE:
2926 case ATA_CMD_PIO_WRITE_EXT:
2927 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2928 case ATA_CMD_WRITE_STREAM_EXT:
2929 qc->sect_size = scmd->device->sector_size;
2930 break;
2931
2932 /* Everything else uses 512 byte "sectors" */
2933 default:
2934 qc->sect_size = ATA_SECT_SIZE;
Tejun Heobd30add2009-09-03 16:08:11 +09002935 }
2936
2937 /*
2938 * Set flags so that all registers will be written, pass on
2939 * write indication (used for PIO/DMA setup), result TF is
2940 * copied back and we don't whine too much about its failure.
2941 */
Douglas Gilbertbc496ed2010-02-01 13:11:38 -05002942 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heobd30add2009-09-03 16:08:11 +09002943 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2944 tf->flags |= ATA_TFLAG_WRITE;
2945
2946 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2947
2948 /*
2949 * Set transfer length.
2950 *
2951 * TODO: find out if we need to do more here to
2952 * cover scatter/gather case.
2953 */
2954 ata_qc_set_pc_nbytes(qc);
2955
2956 /* We may not issue DMA commands if no DMA mode is set */
2957 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2958 goto invalid_fld;
2959
Albert Lee1dce5892007-06-07 15:49:22 +08002960 /* sanity check for pio multi commands */
2961 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2962 goto invalid_fld;
2963
2964 if (is_multi_taskfile(tf)) {
2965 unsigned int multi_count = 1 << (cdb[1] >> 5);
2966
2967 /* compare the passed through multi_count
2968 * with the cached multi_count of libata
2969 */
2970 if (multi_count != dev->multi_count)
2971 ata_dev_printk(dev, KERN_WARNING,
2972 "invalid multi_count %u ignored\n",
2973 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002974 }
Albert Lee1dce5892007-06-07 15:49:22 +08002975
Jeff Garzikb0955182005-05-12 15:45:22 -04002976 /*
2977 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2978 * SET_FEATURES - XFER MODE must be preceded/succeeded
2979 * by an update to hardware-specific registers for each
2980 * controller (i.e. the reason for ->set_piomode(),
2981 * ->set_dmamode(), and ->post_set_mode() hooks).
2982 */
Tejun Heobd30add2009-09-03 16:08:11 +09002983 if (tf->command == ATA_CMD_SET_FEATURES &&
2984 tf->feature == SETFEATURES_XFER)
Tejun Heo9a405252005-12-02 11:49:11 +09002985 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002986
2987 /*
Tejun Heobd30add2009-09-03 16:08:11 +09002988 * Filter TPM commands by default. These provide an
2989 * essentially uncontrolled encrypted "back door" between
2990 * applications and the disk. Set libata.allow_tpm=1 if you
2991 * have a real reason for wanting to use them. This ensures
2992 * that installed software cannot easily mess stuff up without
2993 * user intent. DVR type users will probably ship with this enabled
2994 * for movie content management.
Jeff Garzikb0955182005-05-12 15:45:22 -04002995 *
Tejun Heobd30add2009-09-03 16:08:11 +09002996 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2997 * for this and should do in future but that it is not sufficient as
2998 * DCS is an optional feature set. Thus we also do the software filter
2999 * so that we comply with the TC consortium stated goal that the user
3000 * can turn off TC features of their system.
Jeff Garzikb0955182005-05-12 15:45:22 -04003001 */
Tejun Heobd30add2009-09-03 16:08:11 +09003002 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3003 goto invalid_fld;
Tejun Heoe61e0672006-05-15 20:57:40 +09003004
Jeff Garzikb0955182005-05-12 15:45:22 -04003005 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09003006
3007 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09003008 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09003009 /* "Invalid field in cdb" */
3010 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04003011}
3012
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003013static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3014{
3015 struct ata_taskfile *tf = &qc->tf;
3016 struct scsi_cmnd *scmd = qc->scsicmd;
3017 struct ata_device *dev = qc->dev;
3018 const u8 *cdb = scmd->cmnd;
3019 u64 block;
3020 u32 n_block;
3021 u32 size;
3022 void *buf;
3023
3024 /* we may not issue DMA commands if no DMA mode is set */
3025 if (unlikely(!dev->dma_mode))
3026 goto invalid_fld;
3027
3028 if (unlikely(scmd->cmd_len < 16))
3029 goto invalid_fld;
3030 scsi_16_lba_len(cdb, &block, &n_block);
3031
3032 /* for now we only support WRITE SAME with the unmap bit set */
3033 if (unlikely(!(cdb[1] & 0x8)))
3034 goto invalid_fld;
3035
3036 /*
3037 * WRITE SAME always has a sector sized buffer as payload, this
3038 * should never be a multiple entry S/G list.
3039 */
3040 if (!scsi_sg_count(scmd))
3041 goto invalid_fld;
3042
3043 buf = page_address(sg_page(scsi_sglist(scmd)));
Martin K. Petersend0634c42009-11-26 12:00:43 -05003044 size = ata_set_lba_range_entries(buf, 512, block, n_block);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003045
3046 tf->protocol = ATA_PROT_DMA;
3047 tf->hob_feature = 0;
3048 tf->feature = ATA_DSM_TRIM;
3049 tf->hob_nsect = (size / 512) >> 8;
3050 tf->nsect = size / 512;
3051 tf->command = ATA_CMD_DSM;
3052 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3053 ATA_TFLAG_WRITE;
3054
3055 ata_qc_set_pc_nbytes(qc);
3056
3057 return 0;
3058
3059 invalid_fld:
3060 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3061 /* "Invalid field in cdb" */
3062 return 1;
3063}
3064
Linus Torvalds1da177e2005-04-16 15:20:36 -07003065/**
3066 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3067 * @dev: ATA device
3068 * @cmd: SCSI command opcode to consider
3069 *
3070 * Look up the SCSI command given, and determine whether the
3071 * SCSI command is to be translated or simulated.
3072 *
3073 * RETURNS:
3074 * Pointer to translation function if possible, %NULL if not.
3075 */
3076
3077static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3078{
3079 switch (cmd) {
3080 case READ_6:
3081 case READ_10:
3082 case READ_16:
3083
3084 case WRITE_6:
3085 case WRITE_10:
3086 case WRITE_16:
3087 return ata_scsi_rw_xlat;
3088
Christoph Hellwig0cdd6eb2009-12-10 10:36:01 +01003089 case WRITE_SAME_16:
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003090 return ata_scsi_write_same_xlat;
3091
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092 case SYNCHRONIZE_CACHE:
3093 if (ata_try_flush_cache(dev))
3094 return ata_scsi_flush_xlat;
3095 break;
3096
3097 case VERIFY:
3098 case VERIFY_16:
3099 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04003100
3101 case ATA_12:
3102 case ATA_16:
3103 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04003104
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04003105 case START_STOP:
3106 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107 }
3108
3109 return NULL;
3110}
3111
3112/**
3113 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3114 * @ap: ATA port to which the command was being sent
3115 * @cmd: SCSI command to dump
3116 *
3117 * Prints the contents of a SCSI command via printk().
3118 */
3119
3120static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3121 struct scsi_cmnd *cmd)
3122{
3123#ifdef ATA_DEBUG
3124 struct scsi_device *scsidev = cmd->device;
3125 u8 *scsicmd = cmd->cmnd;
3126
3127 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09003128 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129 scsidev->channel, scsidev->id, scsidev->lun,
3130 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3131 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3132 scsicmd[8]);
3133#endif
3134}
3135
Tejun Heo542b1442006-12-17 10:45:08 +09003136static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09003137 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06003138{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003139 u8 scsi_op = scmd->cmnd[0];
3140 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09003141 int rc = 0;
3142
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003143 if (dev->class == ATA_DEV_ATA) {
3144 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3145 goto bad_cdb_len;
3146
3147 xlat_func = ata_get_xlat_func(dev, scsi_op);
3148 } else {
3149 if (unlikely(!scmd->cmd_len))
3150 goto bad_cdb_len;
3151
3152 xlat_func = NULL;
3153 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3154 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09003155 int len = COMMAND_SIZE(scsi_op);
3156 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003157 goto bad_cdb_len;
3158
3159 xlat_func = atapi_xlat;
3160 } else {
3161 /* ATA_16 passthru, treat as an ATA command */
3162 if (unlikely(scmd->cmd_len > 16))
3163 goto bad_cdb_len;
3164
3165 xlat_func = ata_get_xlat_func(dev, scsi_op);
3166 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09003167 }
3168
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003169 if (xlat_func)
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003170 rc = ata_scsi_translate(dev, scmd, xlat_func);
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003171 else
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003172 ata_scsi_simulate(dev, scmd);
Tejun Heo2115ea92006-05-15 21:03:39 +09003173
3174 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003175
3176 bad_cdb_len:
3177 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3178 scmd->cmd_len, scsi_op, dev->cdb_len);
3179 scmd->result = DID_ERROR << 16;
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003180 scmd->scsi_done(scmd);
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003181 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06003182}
3183
Linus Torvalds1da177e2005-04-16 15:20:36 -07003184/**
3185 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
Jeff Garzik23e701e2010-11-17 12:03:58 -05003186 * @shost: SCSI host of command to be sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07003187 * @cmd: SCSI command to be sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07003188 *
3189 * In some cases, this function translates SCSI commands into
3190 * ATA taskfiles, and queues the taskfiles to be sent to
3191 * hardware. In other cases, this function simulates a
3192 * SCSI device by evaluating and responding to certain
3193 * SCSI commands. This creates the overall effect of
3194 * ATA and ATAPI devices appearing as SCSI devices.
3195 *
3196 * LOCKING:
Jeff Garzik23e701e2010-11-17 12:03:58 -05003197 * ATA host lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07003198 *
3199 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09003200 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3201 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003202 */
Jeff Garzik23e701e2010-11-17 12:03:58 -05003203int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204{
3205 struct ata_port *ap;
3206 struct ata_device *dev;
3207 struct scsi_device *scsidev = cmd->device;
Tejun Heo2115ea92006-05-15 21:03:39 +09003208 int rc = 0;
Jeff Garzik23e701e2010-11-17 12:03:58 -05003209 unsigned long irq_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210
Jeff Garzik35bb94b2006-04-11 13:12:34 -04003211 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003212
Jeff Garzik23e701e2010-11-17 12:03:58 -05003213 spin_lock_irqsave(ap->lock, irq_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214
3215 ata_scsi_dump_cdb(ap, cmd);
3216
3217 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003218 if (likely(dev))
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003219 rc = __ata_scsi_queuecmd(cmd, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003220 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003221 cmd->result = (DID_BAD_TARGET << 16);
Jeff Garzik23e701e2010-11-17 12:03:58 -05003222 cmd->scsi_done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223 }
3224
Jeff Garzik23e701e2010-11-17 12:03:58 -05003225 spin_unlock_irqrestore(ap->lock, irq_flags);
3226
Tejun Heo2115ea92006-05-15 21:03:39 +09003227 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003228}
3229
3230/**
3231 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003232 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233 * @cmd: SCSI command being sent to device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003234 *
3235 * Interprets and directly executes a select list of SCSI commands
3236 * that can be handled internally.
3237 *
3238 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003239 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 */
3241
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003242void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243{
3244 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04003245 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04003246 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247
Tejun Heo9a3dccc2006-01-06 09:56:18 +01003248 args.dev = dev;
3249 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250 args.cmd = cmd;
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003251 args.done = cmd->scsi_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003252
3253 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003254 /* TODO: worth improving? */
3255 case FORMAT_UNIT:
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003256 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003257 break;
3258
3259 case INQUIRY:
3260 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003261 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003262 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3263 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3264 else switch (scsicmd[2]) {
3265 case 0x00:
3266 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003267 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003268 case 0x80:
3269 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003270 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003271 case 0x83:
3272 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003273 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003274 case 0x89:
3275 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003276 break;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003277 case 0xb0:
3278 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3279 break;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06003280 case 0xb1:
3281 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3282 break;
Martin K. Petersen02e0a602010-09-10 01:23:18 -04003283 case 0xb2:
3284 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3285 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003286 default:
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003287 ata_scsi_invalid_field(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003289 }
3290 break;
3291
3292 case MODE_SENSE:
3293 case MODE_SENSE_10:
3294 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3295 break;
3296
3297 case MODE_SELECT: /* unconditionally return */
3298 case MODE_SELECT_10: /* bad-field-in-cdb */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003299 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003300 break;
3301
3302 case READ_CAPACITY:
3303 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3304 break;
3305
3306 case SERVICE_ACTION_IN:
3307 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3308 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3309 else
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003310 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003311 break;
3312
3313 case REPORT_LUNS:
3314 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3315 break;
3316
3317 case REQUEST_SENSE:
3318 ata_scsi_set_sense(cmd, 0, 0, 0);
3319 cmd->result = (DRIVER_SENSE << 24);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003320 cmd->scsi_done(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003321 break;
3322
3323 /* if we reach this, then writeback caching is disabled,
3324 * turning this into a no-op.
3325 */
3326 case SYNCHRONIZE_CACHE:
3327 /* fall through */
3328
3329 /* no-op's, complete with success */
3330 case REZERO_UNIT:
3331 case SEEK_6:
3332 case SEEK_10:
3333 case TEST_UNIT_READY:
3334 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3335 break;
3336
3337 case SEND_DIAGNOSTIC:
3338 tmp8 = scsicmd[1] & ~(1 << 3);
3339 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3340 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3341 else
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003342 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003343 break;
3344
3345 /* all other commands */
3346 default:
3347 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3348 /* "Invalid command operation code" */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003349 cmd->scsi_done(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003350 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003351 }
3352}
3353
Tejun Heof3187192007-04-17 23:44:07 +09003354int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3355{
3356 int i, rc;
3357
3358 for (i = 0; i < host->n_ports; i++) {
3359 struct ata_port *ap = host->ports[i];
3360 struct Scsi_Host *shost;
3361
3362 rc = -ENOMEM;
3363 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3364 if (!shost)
3365 goto err_alloc;
3366
3367 *(struct ata_port **)&shost->hostdata[0] = ap;
3368 ap->scsi_host = shost;
3369
Gwendal Grignoud9027472010-05-25 12:31:38 -07003370 shost->transportt = ata_scsi_transport_template;
Tejun Heof3187192007-04-17 23:44:07 +09003371 shost->unique_id = ap->print_id;
3372 shost->max_id = 16;
3373 shost->max_lun = 1;
3374 shost->max_channel = 1;
3375 shost->max_cmd_len = 16;
3376
Tejun Heo31cc23b2007-09-23 13:14:12 +09003377 /* Schedule policy is determined by ->qc_defer()
3378 * callback and it needs to see every deferred qc.
3379 * Set host_blocked to 1 to prevent SCSI midlayer from
3380 * automatically deferring requests.
3381 */
3382 shost->max_host_blocked = 1;
3383
Tejun Heof3187192007-04-17 23:44:07 +09003384 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3385 if (rc)
3386 goto err_add;
3387 }
3388
3389 return 0;
3390
3391 err_add:
3392 scsi_host_put(host->ports[i]->scsi_host);
3393 err_alloc:
3394 while (--i >= 0) {
3395 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3396
3397 scsi_remove_host(shost);
3398 scsi_host_put(shost);
3399 }
3400 return rc;
3401}
3402
Tejun Heo1ae46312007-07-16 14:29:40 +09003403void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003404{
Tejun Heo1ae46312007-07-16 14:29:40 +09003405 int tries = 5;
3406 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003407 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003408 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003409
Tejun Heo1ae46312007-07-16 14:29:40 +09003410 repeat:
Tejun Heo1eca4362008-11-03 20:03:17 +09003411 ata_for_each_link(link, ap, EDGE) {
3412 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003413 struct scsi_device *sdev;
3414 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003415
Tejun Heo1eca4362008-11-03 20:03:17 +09003416 if (dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003417 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003418
Tejun Heo41bda9c2007-08-06 18:36:24 +09003419 if (ata_is_host_link(link))
3420 id = dev->devno;
3421 else
3422 channel = link->pmp;
3423
3424 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3425 NULL);
3426 if (!IS_ERR(sdev)) {
3427 dev->sdev = sdev;
3428 scsi_device_put(sdev);
Grant Grundler295124d2010-08-17 10:56:53 -07003429 } else {
3430 dev->sdev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003431 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003432 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003433 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003434
3435 /* If we scanned while EH was in progress or allocation
3436 * failure occurred, scan would have failed silently. Check
3437 * whether all devices are attached.
3438 */
Tejun Heo1eca4362008-11-03 20:03:17 +09003439 ata_for_each_link(link, ap, EDGE) {
3440 ata_for_each_dev(dev, link, ENABLED) {
3441 if (!dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003442 goto exit_loop;
3443 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003444 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003445 exit_loop:
3446 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003447 return;
3448
3449 /* we're missing some SCSI devices */
3450 if (sync) {
3451 /* If caller requested synchrnous scan && we've made
3452 * any progress, sleep briefly and repeat.
3453 */
3454 if (dev != last_failed_dev) {
3455 msleep(100);
3456 last_failed_dev = dev;
3457 goto repeat;
3458 }
3459
3460 /* We might be failing to detect boot device, give it
3461 * a few more chances.
3462 */
3463 if (--tries) {
3464 msleep(100);
3465 goto repeat;
3466 }
3467
3468 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3469 "failed without making any progress,\n"
3470 " switching to async\n");
3471 }
3472
Tejun Heoad72cf92010-07-02 10:03:52 +02003473 queue_delayed_work(system_long_wq, &ap->hotplug_task,
Tejun Heo1ae46312007-07-16 14:29:40 +09003474 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003475}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003476
3477/**
3478 * ata_scsi_offline_dev - offline attached SCSI device
3479 * @dev: ATA device to offline attached SCSI device for
3480 *
3481 * This function is called from ata_eh_hotplug() and responsible
3482 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003483 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003484 * against clearing.
3485 *
3486 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003487 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003488 *
3489 * RETURNS:
3490 * 1 if attached SCSI device exists, 0 otherwise.
3491 */
3492int ata_scsi_offline_dev(struct ata_device *dev)
3493{
3494 if (dev->sdev) {
3495 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3496 return 1;
3497 }
3498 return 0;
3499}
Tejun Heo580b2102006-05-31 18:28:05 +09003500
3501/**
3502 * ata_scsi_remove_dev - remove attached SCSI device
3503 * @dev: ATA device to remove attached SCSI device for
3504 *
3505 * This function is called from ata_eh_scsi_hotplug() and
3506 * responsible for removing the SCSI device attached to @dev.
3507 *
3508 * LOCKING:
3509 * Kernel thread context (may sleep).
3510 */
3511static void ata_scsi_remove_dev(struct ata_device *dev)
3512{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003513 struct ata_port *ap = dev->link->ap;
Tejun Heo580b2102006-05-31 18:28:05 +09003514 struct scsi_device *sdev;
3515 unsigned long flags;
3516
3517 /* Alas, we need to grab scan_mutex to ensure SCSI device
3518 * state doesn't change underneath us and thus
3519 * scsi_device_get() always succeeds. The mutex locking can
3520 * be removed if there is __scsi_device_get() interface which
3521 * increments reference counts regardless of device state.
3522 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003523 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003524 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003525
Jeff Garzikcca39742006-08-24 03:19:22 -04003526 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b2102006-05-31 18:28:05 +09003527 sdev = dev->sdev;
3528 dev->sdev = NULL;
3529
3530 if (sdev) {
3531 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003532 * away underneath us after the host lock and
Tejun Heo580b2102006-05-31 18:28:05 +09003533 * scan_mutex are released. Hold onto it.
3534 */
3535 if (scsi_device_get(sdev) == 0) {
3536 /* The following ensures the attached sdev is
3537 * offline on return from ata_scsi_offline_dev()
3538 * regardless it wins or loses the race
3539 * against this function.
3540 */
3541 scsi_device_set_state(sdev, SDEV_OFFLINE);
3542 } else {
3543 WARN_ON(1);
3544 sdev = NULL;
3545 }
3546 }
3547
Jeff Garzikba6a1302006-06-22 23:46:10 -04003548 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003549 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003550
3551 if (sdev) {
3552 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
Kay Sieversb9d5fc42009-01-06 10:44:43 -08003553 dev_name(&sdev->sdev_gendev));
Tejun Heo580b2102006-05-31 18:28:05 +09003554
3555 scsi_remove_device(sdev);
3556 scsi_device_put(sdev);
3557 }
3558}
3559
Tejun Heo41bda9c2007-08-06 18:36:24 +09003560static void ata_scsi_handle_link_detach(struct ata_link *link)
3561{
3562 struct ata_port *ap = link->ap;
3563 struct ata_device *dev;
3564
Tejun Heo1eca4362008-11-03 20:03:17 +09003565 ata_for_each_dev(dev, link, ALL) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003566 unsigned long flags;
3567
3568 if (!(dev->flags & ATA_DFLAG_DETACHED))
3569 continue;
3570
3571 spin_lock_irqsave(ap->lock, flags);
3572 dev->flags &= ~ATA_DFLAG_DETACHED;
3573 spin_unlock_irqrestore(ap->lock, flags);
3574
3575 ata_scsi_remove_dev(dev);
3576 }
3577}
3578
Tejun Heo580b2102006-05-31 18:28:05 +09003579/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003580 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003581 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003582 *
3583 * Tell the block layer to send a media change notification
3584 * event.
3585 *
3586 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003587 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003588 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003589void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003590{
Tejun Heo854c73a2007-09-23 13:14:11 +09003591 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003592 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3593 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003594}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003595
3596/**
Tejun Heo580b2102006-05-31 18:28:05 +09003597 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003598 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b2102006-05-31 18:28:05 +09003599 *
3600 * Perform SCSI part of hotplug. It's executed from a separate
3601 * workqueue after EH completes. This is necessary because SCSI
3602 * hot plugging requires working EH and hot unplugging is
3603 * synchronized with hot plugging with a mutex.
3604 *
3605 * LOCKING:
3606 * Kernel thread context (may sleep).
3607 */
David Howells65f27f32006-11-22 14:55:48 +00003608void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b2102006-05-31 18:28:05 +09003609{
David Howells65f27f32006-11-22 14:55:48 +00003610 struct ata_port *ap =
3611 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003612 int i;
Tejun Heo580b2102006-05-31 18:28:05 +09003613
Tejun Heob51e9e52006-06-29 01:29:30 +09003614 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b2102006-05-31 18:28:05 +09003615 DPRINTK("ENTER/EXIT - unloading\n");
3616 return;
3617 }
3618
3619 DPRINTK("ENTER\n");
Tejun Heoad72cf92010-07-02 10:03:52 +02003620 mutex_lock(&ap->scsi_scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003621
Tejun Heo41bda9c2007-08-06 18:36:24 +09003622 /* Unplug detached devices. We cannot use link iterator here
3623 * because PMP links have to be scanned even if PMP is
3624 * currently not attached. Iterate manually.
3625 */
3626 ata_scsi_handle_link_detach(&ap->link);
3627 if (ap->pmp_link)
3628 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3629 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b2102006-05-31 18:28:05 +09003630
3631 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003632 ata_scsi_scan_host(ap, 0);
Tejun Heo580b2102006-05-31 18:28:05 +09003633
Tejun Heoad72cf92010-07-02 10:03:52 +02003634 mutex_unlock(&ap->scsi_scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003635 DPRINTK("EXIT\n");
3636}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003637
3638/**
3639 * ata_scsi_user_scan - indication for user-initiated bus scan
3640 * @shost: SCSI host to scan
3641 * @channel: Channel to scan
3642 * @id: ID to scan
3643 * @lun: LUN to scan
3644 *
3645 * This function is called when user explicitly requests bus
3646 * scan. Set probe pending flag and invoke EH.
3647 *
3648 * LOCKING:
3649 * SCSI layer (we don't care)
3650 *
3651 * RETURNS:
3652 * Zero.
3653 */
Gwendal Grignoud9027472010-05-25 12:31:38 -07003654int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3655 unsigned int id, unsigned int lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003656{
3657 struct ata_port *ap = ata_shost_to_port(shost);
3658 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003659 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003660
3661 if (!ap->ops->error_handler)
3662 return -EOPNOTSUPP;
3663
Tejun Heo41bda9c2007-08-06 18:36:24 +09003664 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003665 return -EINVAL;
3666
Tejun Heo071f44b2008-04-07 22:47:22 +09003667 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003668 if (channel != SCAN_WILD_CARD && channel)
3669 return -EINVAL;
3670 devno = id;
3671 } else {
3672 if (id != SCAN_WILD_CARD && id)
3673 return -EINVAL;
3674 devno = channel;
3675 }
3676
Jeff Garzikba6a1302006-06-22 23:46:10 -04003677 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003678
Tejun Heo41bda9c2007-08-06 18:36:24 +09003679 if (devno == SCAN_WILD_CARD) {
3680 struct ata_link *link;
3681
Tejun Heo1eca4362008-11-03 20:03:17 +09003682 ata_for_each_link(link, ap, EDGE) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003683 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003684 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003685 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003686 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003687 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003688 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003689
3690 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003691 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003692 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003693 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003694 } else
3695 rc = -EINVAL;
3696 }
3697
Tejun Heo309afcb2006-09-30 18:07:17 +09003698 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003699 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003700 spin_unlock_irqrestore(ap->lock, flags);
3701 ata_port_wait_eh(ap);
3702 } else
3703 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003704
3705 return rc;
3706}
zhao, forrest3057ac32006-06-12 12:01:34 +08003707
3708/**
Tejun Heod0171262006-06-12 22:51:14 +09003709 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003710 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003711 *
Tejun Heod0171262006-06-12 22:51:14 +09003712 * After ATA pass thru (SAT) commands are executed successfully,
Tejun Heoad72cf92010-07-02 10:03:52 +02003713 * libata need to propagate the changes to SCSI layer.
zhao, forrest3057ac32006-06-12 12:01:34 +08003714 *
Tejun Heod0171262006-06-12 22:51:14 +09003715 * LOCKING:
3716 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003717 */
David Howells65f27f32006-11-22 14:55:48 +00003718void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003719{
David Howells65f27f32006-11-22 14:55:48 +00003720 struct ata_port *ap =
3721 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003722 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003723 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003724 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003725
Tejun Heoad72cf92010-07-02 10:03:52 +02003726 mutex_lock(&ap->scsi_scan_mutex);
Tejun Heof84e7e42006-11-22 11:21:31 +09003727 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003728
Tejun Heo1eca4362008-11-03 20:03:17 +09003729 ata_for_each_link(link, ap, EDGE) {
3730 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003731 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003732
Tejun Heo1eca4362008-11-03 20:03:17 +09003733 if (!sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003734 continue;
3735 if (scsi_device_get(sdev))
3736 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003737
Tejun Heo41bda9c2007-08-06 18:36:24 +09003738 spin_unlock_irqrestore(ap->lock, flags);
3739 scsi_rescan_device(&(sdev->sdev_gendev));
3740 scsi_device_put(sdev);
3741 spin_lock_irqsave(ap->lock, flags);
3742 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003743 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003744
3745 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoad72cf92010-07-02 10:03:52 +02003746 mutex_unlock(&ap->scsi_scan_mutex);
zhao, forrest3057ac32006-06-12 12:01:34 +08003747}
Brian King80289162006-08-07 14:27:31 -05003748
3749/**
3750 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003751 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003752 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003753 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003754 *
3755 * LOCKING:
3756 * PCI/etc. bus probe sem.
3757 *
3758 * RETURNS:
3759 * ata_port pointer on success / NULL on failure.
3760 */
3761
Jeff Garzikcca39742006-08-24 03:19:22 -04003762struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003763 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003764 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003765{
Tejun Heof3187192007-04-17 23:44:07 +09003766 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003767
Tejun Heof3187192007-04-17 23:44:07 +09003768 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003769 if (!ap)
3770 return NULL;
3771
Tejun Heof3187192007-04-17 23:44:07 +09003772 ap->port_no = 0;
James Bottomleya29b5da2011-01-23 08:30:00 -06003773 ap->lock = &host->lock;
Tejun Heof3187192007-04-17 23:44:07 +09003774 ap->pio_mask = port_info->pio_mask;
3775 ap->mwdma_mask = port_info->mwdma_mask;
3776 ap->udma_mask = port_info->udma_mask;
3777 ap->flags |= port_info->flags;
3778 ap->ops = port_info->port_ops;
3779 ap->cbl = ATA_CBL_SATA;
3780
Brian King80289162006-08-07 14:27:31 -05003781 return ap;
3782}
3783EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3784
3785/**
3786 * ata_sas_port_start - Set port up for dma.
3787 * @ap: Port to initialize
3788 *
3789 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003790 * initialized.
Brian King80289162006-08-07 14:27:31 -05003791 *
3792 * May be used as the port_start() entry in ata_port_operations.
3793 *
3794 * LOCKING:
3795 * Inherited from caller.
3796 */
3797int ata_sas_port_start(struct ata_port *ap)
3798{
James Bottomleydde20202008-02-19 11:36:56 +01003799 return 0;
Brian King80289162006-08-07 14:27:31 -05003800}
3801EXPORT_SYMBOL_GPL(ata_sas_port_start);
3802
3803/**
3804 * ata_port_stop - Undo ata_sas_port_start()
3805 * @ap: Port to shut down
3806 *
Brian King80289162006-08-07 14:27:31 -05003807 * May be used as the port_stop() entry in ata_port_operations.
3808 *
3809 * LOCKING:
3810 * Inherited from caller.
3811 */
3812
3813void ata_sas_port_stop(struct ata_port *ap)
3814{
Brian King80289162006-08-07 14:27:31 -05003815}
3816EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3817
3818/**
3819 * ata_sas_port_init - Initialize a SATA device
3820 * @ap: SATA port to initialize
3821 *
3822 * LOCKING:
3823 * PCI/etc. bus probe sem.
3824 *
3825 * RETURNS:
3826 * Zero on success, non-zero on error.
3827 */
3828
3829int ata_sas_port_init(struct ata_port *ap)
3830{
3831 int rc = ap->ops->port_start(ap);
3832
Tejun Heof3187192007-04-17 23:44:07 +09003833 if (!rc) {
3834 ap->print_id = ata_print_id++;
James Bottomley238c9cf2011-01-23 08:28:33 -06003835 rc = ata_port_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003836 }
Brian King80289162006-08-07 14:27:31 -05003837
3838 return rc;
3839}
3840EXPORT_SYMBOL_GPL(ata_sas_port_init);
3841
3842/**
3843 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3844 * @ap: SATA port to destroy
3845 *
3846 */
3847
3848void ata_sas_port_destroy(struct ata_port *ap)
3849{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003850 if (ap->ops->port_stop)
3851 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003852 kfree(ap);
3853}
3854EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3855
3856/**
3857 * ata_sas_slave_configure - Default slave_config routine for libata devices
3858 * @sdev: SCSI device to configure
3859 * @ap: ATA port to which SCSI device is attached
3860 *
3861 * RETURNS:
3862 * Zero.
3863 */
3864
3865int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3866{
3867 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003868 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003869 return 0;
3870}
3871EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3872
3873/**
3874 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3875 * @cmd: SCSI command to be sent
Brian King80289162006-08-07 14:27:31 -05003876 * @ap: ATA port to which the command is being sent
3877 *
3878 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003879 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3880 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003881 */
3882
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003883int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
Brian King80289162006-08-07 14:27:31 -05003884{
Brian King08475a12006-11-20 13:51:56 -06003885 int rc = 0;
3886
Brian King80289162006-08-07 14:27:31 -05003887 ata_scsi_dump_cdb(ap, cmd);
3888
Tejun Heo2486fa52008-07-31 07:52:40 +09003889 if (likely(ata_dev_enabled(ap->link.device)))
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003890 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003891 else {
3892 cmd->result = (DID_BAD_TARGET << 16);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003893 cmd->scsi_done(cmd);
Brian King80289162006-08-07 14:27:31 -05003894 }
Brian King08475a12006-11-20 13:51:56 -06003895 return rc;
Brian King80289162006-08-07 14:27:31 -05003896}
3897EXPORT_SYMBOL_GPL(ata_sas_queuecmd);