blob: 5defc74973d751a6283b10ac40bc29f257abbedd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090036#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
40#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <scsi/scsi_host.h>
Christoph Hellwigbeb40482006-06-10 18:01:03 +020042#include <scsi/scsi_cmnd.h>
Mike Christie85837eb2005-11-11 16:38:53 -060043#include <scsi/scsi_eh.h>
Jeff Garzik005a5a02005-10-30 23:31:48 -050044#include <scsi/scsi_device.h>
Tejun Heoa6e6ce82006-05-15 21:03:48 +090045#include <scsi/scsi_tcq.h>
Tejun Heo30afc842006-03-18 18:40:14 +090046#include <scsi/scsi_transport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/libata.h>
Jeff Garzikb0955182005-05-12 15:45:22 -040048#include <linux/hdreg.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040049#include <linux/uaccess.h>
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +010050#include <linux/suspend.h>
Christoph Hellwig18f0f972009-11-17 10:00:47 -050051#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53#include "libata.h"
Gwendal Grignoud9027472010-05-25 12:31:38 -070054#include "libata-transport.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Tejun Heo87340e92008-04-28 17:48:51 +090056#define ATA_SCSI_RBUF_SIZE 4096
57
58static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
59static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
Jeff Garzikb0955182005-05-12 15:45:22 -040060
Tejun Heoad706992006-12-17 10:45:57 +090061typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090062
Jeff Garzik2dcb4072007-10-19 06:42:56 -040063static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090064 const struct scsi_device *scsidev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -040065static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090066 const struct scsi_device *scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040068#define RW_RECOVERY_MPAGE 0x1
69#define RW_RECOVERY_MPAGE_LEN 12
70#define CACHE_MPAGE 0x8
71#define CACHE_MPAGE_LEN 20
72#define CONTROL_MPAGE 0xa
73#define CONTROL_MPAGE_LEN 12
74#define ALL_MPAGES 0x3f
75#define ALL_SUB_MPAGES 0xff
76
77
Jeff Garzik24f75682007-09-21 07:54:49 -040078static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040079 RW_RECOVERY_MPAGE,
80 RW_RECOVERY_MPAGE_LEN - 2,
Jeff Garzik24f75682007-09-21 07:54:49 -040081 (1 << 7), /* AWRE */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040082 0, /* read retry count */
83 0, 0, 0, 0,
84 0, /* write retry count */
85 0, 0, 0
86};
87
88static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
89 CACHE_MPAGE,
90 CACHE_MPAGE_LEN - 2,
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0
95};
96
97static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
98 CONTROL_MPAGE,
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
104};
105
Tejun Heoc93b2632010-09-01 17:50:04 +0200106static const char *ata_lpm_policy_names[] = {
107 [ATA_LPM_UNKNOWN] = "max_performance",
108 [ATA_LPM_MAX_POWER] = "max_performance",
109 [ATA_LPM_MED_POWER] = "medium_power",
110 [ATA_LPM_MIN_POWER] = "min_power",
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400111};
112
Tejun Heoc93b2632010-09-01 17:50:04 +0200113static ssize_t ata_scsi_lpm_store(struct device *dev,
114 struct device_attribute *attr,
115 const char *buf, size_t count)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400116{
Tony Jonesee959b02008-02-22 00:13:36 +0100117 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400118 struct ata_port *ap = ata_shost_to_port(shost);
Tejun Heoc93b2632010-09-01 17:50:04 +0200119 enum ata_lpm_policy policy;
Tejun Heo6b7ae952010-09-01 17:50:06 +0200120 unsigned long flags;
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400121
Tejun Heoc93b2632010-09-01 17:50:04 +0200122 /* UNKNOWN is internal state, iterate from MAX_POWER */
123 for (policy = ATA_LPM_MAX_POWER;
124 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
125 const char *name = ata_lpm_policy_names[policy];
126
127 if (strncmp(name, buf, strlen(name)) == 0)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400128 break;
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400129 }
Tejun Heoc93b2632010-09-01 17:50:04 +0200130 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400131 return -EINVAL;
132
Tejun Heo6b7ae952010-09-01 17:50:06 +0200133 spin_lock_irqsave(ap->lock, flags);
134 ap->target_lpm_policy = policy;
135 ata_port_schedule_eh(ap);
136 spin_unlock_irqrestore(ap->lock, flags);
137
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400138 return count;
139}
140
Tejun Heoc93b2632010-09-01 17:50:04 +0200141static ssize_t ata_scsi_lpm_show(struct device *dev,
142 struct device_attribute *attr, char *buf)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400143{
Tony Jonesee959b02008-02-22 00:13:36 +0100144 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400145 struct ata_port *ap = ata_shost_to_port(shost);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400146
Tejun Heo6b7ae952010-09-01 17:50:06 +0200147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400148 return -EINVAL;
149
Tejun Heoc93b2632010-09-01 17:50:04 +0200150 return snprintf(buf, PAGE_SIZE, "%s\n",
Tejun Heo6b7ae952010-09-01 17:50:06 +0200151 ata_lpm_policy_names[ap->target_lpm_policy]);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400152}
Tony Jonesee959b02008-02-22 00:13:36 +0100153DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
Tejun Heoc93b2632010-09-01 17:50:04 +0200154 ata_scsi_lpm_show, ata_scsi_lpm_store);
Tony Jonesee959b02008-02-22 00:13:36 +0100155EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400156
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200157static ssize_t ata_scsi_park_show(struct device *device,
158 struct device_attribute *attr, char *buf)
159{
160 struct scsi_device *sdev = to_scsi_device(device);
161 struct ata_port *ap;
162 struct ata_link *link;
163 struct ata_device *dev;
Elias Oltmannsa4641892008-11-03 19:01:08 +0900164 unsigned long flags, now;
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200165 unsigned int uninitialized_var(msecs);
166 int rc = 0;
167
168 ap = ata_shost_to_port(sdev->host);
169
170 spin_lock_irqsave(ap->lock, flags);
171 dev = ata_scsi_find_dev(ap, sdev);
172 if (!dev) {
173 rc = -ENODEV;
174 goto unlock;
175 }
176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
177 rc = -EOPNOTSUPP;
178 goto unlock;
179 }
180
181 link = dev->link;
Elias Oltmannsa4641892008-11-03 19:01:08 +0900182 now = jiffies;
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
184 link->eh_context.unloaded_mask & (1 << dev->devno) &&
Elias Oltmannsa4641892008-11-03 19:01:08 +0900185 time_after(dev->unpark_deadline, now))
186 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200187 else
188 msecs = 0;
189
190unlock:
191 spin_unlock_irq(ap->lock);
192
193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
194}
195
196static ssize_t ata_scsi_park_store(struct device *device,
197 struct device_attribute *attr,
198 const char *buf, size_t len)
199{
200 struct scsi_device *sdev = to_scsi_device(device);
201 struct ata_port *ap;
202 struct ata_device *dev;
203 long int input;
204 unsigned long flags;
205 int rc;
206
207 rc = strict_strtol(buf, 10, &input);
208 if (rc || input < -2)
209 return -EINVAL;
210 if (input > ATA_TMOUT_MAX_PARK) {
211 rc = -EOVERFLOW;
212 input = ATA_TMOUT_MAX_PARK;
213 }
214
215 ap = ata_shost_to_port(sdev->host);
216
217 spin_lock_irqsave(ap->lock, flags);
218 dev = ata_scsi_find_dev(ap, sdev);
219 if (unlikely(!dev)) {
220 rc = -ENODEV;
221 goto unlock;
222 }
223 if (dev->class != ATA_DEV_ATA) {
224 rc = -EOPNOTSUPP;
225 goto unlock;
226 }
227
228 if (input >= 0) {
229 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
230 rc = -EOPNOTSUPP;
231 goto unlock;
232 }
233
234 dev->unpark_deadline = ata_deadline(jiffies, input);
235 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
236 ata_port_schedule_eh(ap);
237 complete(&ap->park_req_pending);
238 } else {
239 switch (input) {
240 case -1:
241 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
242 break;
243 case -2:
244 dev->flags |= ATA_DFLAG_NO_UNLOAD;
245 break;
246 }
247 }
248unlock:
249 spin_unlock_irqrestore(ap->lock, flags);
250
251 return rc ? rc : len;
252}
253DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
254 ata_scsi_park_show, ata_scsi_park_store);
255EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
256
Tejun Heof0761be2008-04-28 17:16:52 +0900257static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
258{
259 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
260
261 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
262}
263
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700264static ssize_t
265ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
267{
268 struct Scsi_Host *shost = class_to_shost(dev);
269 struct ata_port *ap = ata_shost_to_port(shost);
270 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
271 return ap->ops->em_store(ap, buf, count);
272 return -EINVAL;
273}
274
275static ssize_t
276ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
277 char *buf)
278{
279 struct Scsi_Host *shost = class_to_shost(dev);
280 struct ata_port *ap = ata_shost_to_port(shost);
281
282 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
283 return ap->ops->em_show(ap, buf);
284 return -EINVAL;
285}
Vitaly Mayatskikhea7a5ed2009-05-04 15:48:45 +0200286DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700287 ata_scsi_em_message_show, ata_scsi_em_message_store);
288EXPORT_SYMBOL_GPL(dev_attr_em_message);
289
290static ssize_t
291ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
292 char *buf)
293{
294 struct Scsi_Host *shost = class_to_shost(dev);
295 struct ata_port *ap = ata_shost_to_port(shost);
296
297 return snprintf(buf, 23, "%d\n", ap->em_message_type);
298}
299DEVICE_ATTR(em_message_type, S_IRUGO,
300 ata_scsi_em_message_type_show, NULL);
301EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
302
303static ssize_t
304ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
305 char *buf)
306{
307 struct scsi_device *sdev = to_scsi_device(dev);
308 struct ata_port *ap = ata_shost_to_port(sdev->host);
309 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
310
311 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
312 return ap->ops->sw_activity_show(atadev, buf);
313 return -EINVAL;
314}
315
316static ssize_t
317ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
318 const char *buf, size_t count)
319{
320 struct scsi_device *sdev = to_scsi_device(dev);
321 struct ata_port *ap = ata_shost_to_port(sdev->host);
322 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
323 enum sw_activity val;
324 int rc;
325
326 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
327 val = simple_strtoul(buf, NULL, 0);
328 switch (val) {
329 case OFF: case BLINK_ON: case BLINK_OFF:
330 rc = ap->ops->sw_activity_store(atadev, val);
331 if (!rc)
332 return count;
333 else
334 return rc;
335 }
336 }
337 return -EINVAL;
338}
Vitaly Mayatskikhea7a5ed2009-05-04 15:48:45 +0200339DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700340 ata_scsi_activity_store);
341EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
342
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200343struct device_attribute *ata_common_sdev_attrs[] = {
344 &dev_attr_unload_heads,
345 NULL
346};
347EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
348
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
1002 * format is used to accomodate 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 Heoe3790c72008-03-04 11:18:17 +01001102 /* set the min alignment and padding */
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001103 blk_queue_update_dma_alignment(sdev->request_queue,
1104 ATA_DMA_PAD_SZ - 1);
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 {
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001118 /* ATA devices must be sector aligned */
Grant Grundler295124d2010-08-17 10:56:53 -07001119 sdev->sector_size = ata_id_logical_sector_size(dev->id);
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001120 blk_queue_update_dma_alignment(sdev->request_queue,
Grant Grundler295124d2010-08-17 10:56:53 -07001121 sdev->sector_size - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +09001122 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +01001123 }
Tejun Heod8cf5382008-01-15 08:46:59 +09001124
Jeff Garzikf26792d2007-10-29 17:18:39 -04001125 if (dev->flags & ATA_DFLAG_AN)
1126 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1127
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001128 if (dev->flags & ATA_DFLAG_NCQ) {
1129 int depth;
1130
1131 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1132 depth = min(ATA_MAX_QUEUE - 1, depth);
Tejun Heo8a8bc222008-11-10 14:48:21 +09001133 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001134 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001135
Grant Grundler295124d2010-08-17 10:56:53 -07001136 dev->sdev = sdev;
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001137 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001138}
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140/**
1141 * ata_scsi_slave_config - Set SCSI device attributes
1142 * @sdev: SCSI device to examine
1143 *
1144 * This is called before we actually start reading
1145 * and writing to the device, to configure certain
1146 * SCSI mid-layer behaviors.
1147 *
1148 * LOCKING:
1149 * Defined by SCSI layer. We don't really care.
1150 */
1151
1152int ata_scsi_slave_config(struct scsi_device *sdev)
1153{
Tejun Heo31534362006-05-31 18:27:36 +09001154 struct ata_port *ap = ata_shost_to_port(sdev->host);
1155 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001156 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +09001157
Brian Kinga6cce2a2006-03-17 17:04:15 -06001158 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
Tejun Heo31534362006-05-31 18:27:36 +09001160 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001161 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001163 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164}
1165
1166/**
Tejun Heo83c47bc2006-05-31 18:28:07 +09001167 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1168 * @sdev: SCSI device to be destroyed
1169 *
1170 * @sdev is about to be destroyed for hot/warm unplugging. If
1171 * this unplugging was initiated by libata as indicated by NULL
1172 * dev->sdev, this function doesn't have to do anything.
1173 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1174 * Clear dev->sdev, schedule the device for ATA detach and invoke
1175 * EH.
1176 *
1177 * LOCKING:
1178 * Defined by SCSI layer. We don't really care.
1179 */
1180void ata_scsi_slave_destroy(struct scsi_device *sdev)
1181{
1182 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001183 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001184 unsigned long flags;
1185 struct ata_device *dev;
1186
1187 if (!ap->ops->error_handler)
1188 return;
1189
Jeff Garzikba6a1302006-06-22 23:46:10 -04001190 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09001191 dev = __ata_scsi_find_dev(ap, sdev);
1192 if (dev && dev->sdev) {
1193 /* SCSI device already in CANCEL state, no need to offline it */
1194 dev->sdev = NULL;
1195 dev->flags |= ATA_DFLAG_DETACH;
1196 ata_port_schedule_eh(ap);
1197 }
Jeff Garzikba6a1302006-06-22 23:46:10 -04001198 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001199
1200 kfree(q->dma_drain_buffer);
1201 q->dma_drain_buffer = NULL;
1202 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001203}
1204
1205/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001206 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1207 * @sdev: SCSI device to configure queue depth for
1208 * @queue_depth: new queue depth
Mike Christiee881a172009-10-15 17:46:39 -07001209 * @reason: calling context
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001210 *
1211 * This is libata standard hostt->change_queue_depth callback.
1212 * SCSI will call into this callback when user tries to set queue
1213 * depth via sysfs.
1214 *
1215 * LOCKING:
1216 * SCSI layer (we don't care)
1217 *
1218 * RETURNS:
1219 * Newly configured queue depth.
1220 */
Mike Christiee881a172009-10-15 17:46:39 -07001221int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1222 int reason)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001223{
1224 struct ata_port *ap = ata_shost_to_port(sdev->host);
1225 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001226 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001227
Mike Christiee881a172009-10-15 17:46:39 -07001228 if (reason != SCSI_QDEPTH_DEFAULT)
1229 return -EOPNOTSUPP;
1230
Tejun Heoc3c70c42007-02-20 23:31:22 +09001231 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001232 return sdev->queue_depth;
1233
1234 dev = ata_scsi_find_dev(ap, sdev);
1235 if (!dev || !ata_dev_enabled(dev))
1236 return sdev->queue_depth;
1237
Tejun Heoc3c70c42007-02-20 23:31:22 +09001238 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001239 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001240 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1241 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001242 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001243 queue_depth = 1;
1244 }
Tejun Heo360f6542006-09-30 19:45:00 +09001245 spin_unlock_irqrestore(ap->lock, flags);
1246
Tejun Heoc3c70c42007-02-20 23:31:22 +09001247 /* limit and apply queue depth */
1248 queue_depth = min(queue_depth, sdev->host->can_queue);
1249 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1250 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1251
1252 if (sdev->queue_depth == queue_depth)
1253 return -EINVAL;
1254
1255 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001256 return queue_depth;
1257}
1258
1259/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001260 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1261 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001262 *
1263 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1264 * (to start). Perhaps these commands should be preceded by
1265 * CHECK POWER MODE to see what power mode the device is already in.
1266 * [See SAT revision 5 at www.t10.org]
1267 *
1268 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001269 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001270 *
1271 * RETURNS:
1272 * Zero on success, non-zero on error.
1273 */
Tejun Heoad706992006-12-17 10:45:57 +09001274static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001275{
Tejun Heo542b1442006-12-17 10:45:08 +09001276 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001277 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001278 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001279
Tejun Heo2e5704f2006-12-17 10:46:33 +09001280 if (scmd->cmd_len < 5)
1281 goto invalid_fld;
1282
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001283 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1284 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001285 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001286 ; /* ignore IMMED bit, violates sat-r05 */
1287 }
Tejun Heo542b1442006-12-17 10:45:08 +09001288 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001289 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001290 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001291 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001292
Tejun Heo542b1442006-12-17 10:45:08 +09001293 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001294 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001295
1296 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001297 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001298
1299 tf->lbah = 0x0;
1300 tf->lbam = 0x0;
1301 tf->lbal = 0x0;
1302 tf->device |= ATA_LBA;
1303 } else {
1304 /* CHS */
1305 tf->lbal = 0x1; /* sect */
1306 tf->lbam = 0x0; /* cyl low */
1307 tf->lbah = 0x0; /* cyl high */
1308 }
1309
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001310 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001311 } else {
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001312 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1313 * or S5) causing some drives to spin up and down again.
1314 */
1315 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1316 system_state == SYSTEM_POWER_OFF)
1317 goto skip;
1318
1319 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1320 system_entering_hibernation())
1321 goto skip;
1322
Robert Hancock78981a72007-01-30 00:59:18 -08001323 /* Issue ATA STANDBY IMMEDIATE command */
1324 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001325 }
Robert Hancock78981a72007-01-30 00:59:18 -08001326
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001327 /*
1328 * Standby and Idle condition timers could be implemented but that
1329 * would require libata to implement the Power condition mode page
1330 * and allow the user to change it. Changing mode pages requires
1331 * MODE SELECT to be implemented.
1332 */
1333
1334 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001335
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001336 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001337 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001338 /* "Invalid field in cbd" */
1339 return 1;
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001340 skip:
1341 scmd->result = SAM_STAT_GOOD;
1342 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001343}
1344
1345
1346/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1348 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 *
1350 * Sets up an ATA taskfile to issue FLUSH CACHE or
1351 * FLUSH CACHE EXT.
1352 *
1353 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001354 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 *
1356 * RETURNS:
1357 * Zero on success, non-zero on error.
1358 */
Tejun Heoad706992006-12-17 10:45:57 +09001359static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360{
1361 struct ata_taskfile *tf = &qc->tf;
1362
1363 tf->flags |= ATA_TFLAG_DEVICE;
1364 tf->protocol = ATA_PROT_NODATA;
1365
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001366 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 tf->command = ATA_CMD_FLUSH_EXT;
1368 else
1369 tf->command = ATA_CMD_FLUSH;
1370
Tejun Heob666da32007-10-26 15:53:59 +09001371 /* flush is critical for IO integrity, consider it an IO command */
1372 qc->flags |= ATA_QCFLAG_IO;
1373
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 return 0;
1375}
1376
1377/**
Albert Lee3aef5232005-10-04 08:47:43 -04001378 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001379 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001380 *
1381 * Calculate LBA and transfer length for 6-byte commands.
1382 *
1383 * RETURNS:
1384 * @plba: the LBA
1385 * @plen: the transfer length
1386 */
Tejun Heo542b1442006-12-17 10:45:08 +09001387static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001388{
1389 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001390 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001391
1392 VPRINTK("six-byte command\n");
1393
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001394 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001395 lba |= ((u64)cdb[2]) << 8;
1396 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001397
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001398 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001399
1400 *plba = lba;
1401 *plen = len;
1402}
1403
1404/**
1405 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001406 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001407 *
1408 * Calculate LBA and transfer length for 10-byte commands.
1409 *
1410 * RETURNS:
1411 * @plba: the LBA
1412 * @plen: the transfer length
1413 */
Tejun Heo542b1442006-12-17 10:45:08 +09001414static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001415{
1416 u64 lba = 0;
1417 u32 len = 0;
1418
1419 VPRINTK("ten-byte command\n");
1420
Tejun Heo542b1442006-12-17 10:45:08 +09001421 lba |= ((u64)cdb[2]) << 24;
1422 lba |= ((u64)cdb[3]) << 16;
1423 lba |= ((u64)cdb[4]) << 8;
1424 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001425
Tejun Heo542b1442006-12-17 10:45:08 +09001426 len |= ((u32)cdb[7]) << 8;
1427 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001428
1429 *plba = lba;
1430 *plen = len;
1431}
1432
1433/**
1434 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001435 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001436 *
1437 * Calculate LBA and transfer length for 16-byte commands.
1438 *
1439 * RETURNS:
1440 * @plba: the LBA
1441 * @plen: the transfer length
1442 */
Tejun Heo542b1442006-12-17 10:45:08 +09001443static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001444{
1445 u64 lba = 0;
1446 u32 len = 0;
1447
1448 VPRINTK("sixteen-byte command\n");
1449
Tejun Heo542b1442006-12-17 10:45:08 +09001450 lba |= ((u64)cdb[2]) << 56;
1451 lba |= ((u64)cdb[3]) << 48;
1452 lba |= ((u64)cdb[4]) << 40;
1453 lba |= ((u64)cdb[5]) << 32;
1454 lba |= ((u64)cdb[6]) << 24;
1455 lba |= ((u64)cdb[7]) << 16;
1456 lba |= ((u64)cdb[8]) << 8;
1457 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001458
Tejun Heo542b1442006-12-17 10:45:08 +09001459 len |= ((u32)cdb[10]) << 24;
1460 len |= ((u32)cdb[11]) << 16;
1461 len |= ((u32)cdb[12]) << 8;
1462 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001463
1464 *plba = lba;
1465 *plen = len;
1466}
1467
1468/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1470 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 *
1472 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1473 *
1474 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001475 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 *
1477 * RETURNS:
1478 * Zero on success, non-zero on error.
1479 */
Tejun Heoad706992006-12-17 10:45:57 +09001480static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481{
Tejun Heo542b1442006-12-17 10:45:08 +09001482 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001484 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001486 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001487 u64 block;
1488 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
1490 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1491 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Tejun Heo2e5704f2006-12-17 10:46:33 +09001493 if (cdb[0] == VERIFY) {
1494 if (scmd->cmd_len < 10)
1495 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001496 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001497 } else if (cdb[0] == VERIFY_16) {
1498 if (scmd->cmd_len < 16)
1499 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001500 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001501 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001502 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Albert Lee8bf62ece2005-05-12 15:29:42 -04001504 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001505 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001506 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001507 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001508 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001509 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510
Albert Lee07506692005-10-12 15:04:18 +08001511 if (dev->flags & ATA_DFLAG_LBA) {
1512 tf->flags |= ATA_TFLAG_LBA;
1513
Albert Leec6a33e22005-10-12 15:12:26 +08001514 if (lba_28_ok(block, n_block)) {
1515 /* use LBA28 */
1516 tf->command = ATA_CMD_VERIFY;
1517 tf->device |= (block >> 24) & 0xf;
1518 } else if (lba_48_ok(block, n_block)) {
1519 if (!(dev->flags & ATA_DFLAG_LBA48))
1520 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001521
1522 /* use LBA48 */
1523 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001524 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525
Albert Lee8bf62ece2005-05-12 15:29:42 -04001526 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Albert Lee8bf62ece2005-05-12 15:29:42 -04001528 tf->hob_lbah = (block >> 40) & 0xff;
1529 tf->hob_lbam = (block >> 32) & 0xff;
1530 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001531 } else
1532 /* request too large even for LBA48 */
1533 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001534
1535 tf->nsect = n_block & 0xff;
1536
1537 tf->lbah = (block >> 16) & 0xff;
1538 tf->lbam = (block >> 8) & 0xff;
1539 tf->lbal = block & 0xff;
1540
1541 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001543 /* CHS */
1544 u32 sect, head, cyl, track;
1545
Albert Leec6a33e22005-10-12 15:12:26 +08001546 if (!lba_28_ok(block, n_block))
1547 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001548
Albert Lee8bf62ece2005-05-12 15:29:42 -04001549 /* Convert LBA to CHS */
1550 track = (u32)block / dev->sectors;
1551 cyl = track / dev->heads;
1552 head = track % dev->heads;
1553 sect = (u32)block % dev->sectors + 1;
1554
Albert Leec187c4b2005-10-04 08:46:51 -04001555 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1556 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001557
1558 /* Check whether the converted CHS can fit.
1559 Cylinder: 0-65535
Albert Lee8bf62ece2005-05-12 15:29:42 -04001560 Head: 0-15
1561 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001562 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001563 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001564
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001566 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1567 tf->lbal = sect;
1568 tf->lbam = cyl;
1569 tf->lbah = cyl >> 8;
1570 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 }
1572
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001574
1575invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001576 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001577 /* "Invalid field in cbd" */
1578 return 1;
1579
1580out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001581 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001582 /* "Logical Block Address out of range" */
1583 return 1;
1584
1585nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001586 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001587 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588}
1589
1590/**
1591 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1592 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593 *
1594 * Converts any of six SCSI read/write commands into the
1595 * ATA counterpart, including starting sector (LBA),
1596 * sector count, and taking into account the device's LBA48
1597 * support.
1598 *
1599 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1600 * %WRITE_16 are currently supported.
1601 *
1602 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001603 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 *
1605 * RETURNS:
1606 * Zero on success, non-zero on error.
1607 */
Tejun Heoad706992006-12-17 10:45:57 +09001608static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609{
Tejun Heo542b1442006-12-17 10:45:08 +09001610 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001611 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001612 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001613 u64 block;
1614 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001615 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
Tejun Heo542b1442006-12-17 10:45:08 +09001617 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001618 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001620 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001621 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001622 case READ_10:
1623 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001624 if (unlikely(scmd->cmd_len < 10))
1625 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001626 scsi_10_lba_len(cdb, &block, &n_block);
1627 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001628 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001629 break;
1630 case READ_6:
1631 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001632 if (unlikely(scmd->cmd_len < 6))
1633 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001634 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001635
1636 /* for 6-byte r/w commands, transfer length 0
1637 * means 256 blocks of data, not 0 block.
1638 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001639 if (!n_block)
1640 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001641 break;
1642 case READ_16:
1643 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001644 if (unlikely(scmd->cmd_len < 16))
1645 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001646 scsi_16_lba_len(cdb, &block, &n_block);
1647 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001648 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001649 break;
1650 default:
Albert Lee8bf62ece2005-05-12 15:29:42 -04001651 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001652 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 }
1654
Albert Lee8bf62ece2005-05-12 15:29:42 -04001655 /* Check and compose ATA command */
1656 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001657 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1658 * length 0 means transfer 0 block of data.
1659 * However, for ATA R/W commands, sector count 0 means
1660 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001661 *
1662 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001663 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001664 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001665
Tejun Heobd056d72006-11-14 22:47:10 +09001666 qc->flags |= ATA_QCFLAG_IO;
Grant Grundler295124d2010-08-17 10:56:53 -07001667 qc->nbytes = n_block * scmd->device->sector_size;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001668
Tejun Heobd056d72006-11-14 22:47:10 +09001669 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1670 qc->tag);
1671 if (likely(rc == 0))
1672 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001673
Tejun Heobd056d72006-11-14 22:47:10 +09001674 if (rc == -ERANGE)
1675 goto out_of_range;
1676 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001677invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001678 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001679 /* "Invalid field in cbd" */
1680 return 1;
1681
1682out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001683 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001684 /* "Logical Block Address out of range" */
1685 return 1;
1686
1687nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001688 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001689 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690}
1691
Tejun Heo77853bf2006-01-23 13:09:36 +09001692static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693{
Tejun Heoc31f5712006-11-22 12:39:43 +09001694 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001696 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001697 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
Jeff Garzikb0955182005-05-12 15:45:22 -04001699 /* For ATA pass thru (SAT) commands, generate a sense block if
1700 * user mandated it or if there's an error. Note that if we
1701 * generate because the user forced us to, a check condition
1702 * is generated and the ATA register values are returned
1703 * whether the command completed successfully or not. If there
1704 * was no error, SK, ASC and ASCQ will all be zero.
1705 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001706 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001707 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001708 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001709 } else {
1710 if (!need_sense) {
1711 cmd->result = SAM_STAT_GOOD;
1712 } else {
1713 /* TODO: decide which descriptor format to use
1714 * for 48b LBA devices and call that here
1715 * instead of the fixed desc, which is only
1716 * good for smaller LBA (and maybe CHS?)
1717 * devices.
1718 */
Tejun Heo750426a2006-11-14 22:37:35 +09001719 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001720 }
1721 }
1722
Tejun Heoc31f5712006-11-22 12:39:43 +09001723 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001724 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
1726 qc->scsidone(cmd);
1727
Tejun Heo77853bf2006-01-23 13:09:36 +09001728 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729}
1730
1731/**
1732 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 * @dev: ATA device to which the command is addressed
1734 * @cmd: SCSI command to execute
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1736 *
1737 * Our ->queuecommand() function has decided that the SCSI
1738 * command issued can be directly translated into an ATA
1739 * command, rather than handled internally.
1740 *
1741 * This function sets up an ata_queued_cmd structure for the
1742 * SCSI command, and sends that ata_queued_cmd to the hardware.
1743 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001744 * The xlat_func argument (actor) returns 0 if ready to execute
1745 * ATA command, else 1 to finish translation. If 1 is returned
1746 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1747 * to be set reflecting an error condition or clean (early)
1748 * termination.
1749 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001751 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001752 *
1753 * RETURNS:
1754 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1755 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001757static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09001758 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001760 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001762 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763
1764 VPRINTK("ENTER\n");
1765
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05001766 qc = ata_scsi_qc_new(dev, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001768 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
1770 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001771 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1772 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001773 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001774 ata_dev_printk(dev, KERN_WARNING,
1775 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001776 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 }
1778
Boaz Harrosh71201652007-09-18 17:48:50 +02001779 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
1781 qc->dma_dir = cmd->sc_data_direction;
1782 }
1783
1784 qc->complete_fn = ata_scsi_qc_complete;
1785
Tejun Heoad706992006-12-17 10:45:57 +09001786 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001787 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788
Tejun Heo31cc23b2007-09-23 13:14:12 +09001789 if (ap->ops->qc_defer) {
1790 if ((rc = ap->ops->qc_defer(qc)))
1791 goto defer;
1792 }
1793
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001795 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796
1797 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001798 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799
Douglas Gilbertae006512005-10-09 09:09:35 -04001800early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001801 ata_qc_free(qc);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05001802 cmd->scsi_done(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001803 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001804 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001805
1806err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001808 cmd->result = (DID_ERROR << 16);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05001809 cmd->scsi_done(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001810err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001811 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001812 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001813
1814defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001815 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001816 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001817 if (rc == ATA_DEFER_LINK)
1818 return SCSI_MLQUEUE_DEVICE_BUSY;
1819 else
1820 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821}
1822
1823/**
1824 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001825 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001826 * @flags: unsigned long variable to store irq enable status
1827 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 *
Tejun Heo87340e92008-04-28 17:48:51 +09001829 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 *
1831 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001832 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 *
1834 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001835 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 */
Tejun Heo87340e92008-04-28 17:48:51 +09001837static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1838 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839{
Tejun Heo87340e92008-04-28 17:48:51 +09001840 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841
Tejun Heo87340e92008-04-28 17:48:51 +09001842 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1843 if (copy_in)
1844 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1845 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1846 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847}
1848
1849/**
1850 * ata_scsi_rbuf_put - Unmap response buffer.
1851 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001852 * @copy_out: copy out result
1853 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 *
Tejun Heo87340e92008-04-28 17:48:51 +09001855 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1856 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 *
1858 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001859 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 */
Tejun Heo87340e92008-04-28 17:48:51 +09001861static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1862 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863{
Tejun Heo87340e92008-04-28 17:48:51 +09001864 if (copy_out)
1865 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1866 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1867 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868}
1869
1870/**
1871 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1872 * @args: device IDENTIFY data / SCSI command of interest.
1873 * @actor: Callback hook for desired SCSI command simulator
1874 *
1875 * Takes care of the hard work of simulating a SCSI command...
1876 * Mapping the response buffer, calling the command's handler,
1877 * and handling the handler's return value. This return value
1878 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001879 * completed successfully (0), or not (in which case cmd->result
1880 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 *
1882 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001883 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 */
Tejun Heof0761be2008-04-28 17:16:52 +09001885static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001886 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887{
1888 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001889 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001891 unsigned long flags;
1892
Tejun Heo87340e92008-04-28 17:48:51 +09001893 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1894 rc = actor(args, rbuf);
1895 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001896
Douglas Gilbertae006512005-10-09 09:09:35 -04001897 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001899 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900}
1901
1902/**
1903 * ata_scsiop_inq_std - Simulate INQUIRY command
1904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906 *
1907 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001908 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 *
1910 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001911 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912 */
Tejun Heo87340e92008-04-28 17:48:51 +09001913static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914{
Tejun Heo87340e92008-04-28 17:48:51 +09001915 const u8 versions[] = {
1916 0x60, /* SAM-3 (no version claimed) */
1917
1918 0x03,
1919 0x20, /* SBC-2 (no version claimed) */
1920
1921 0x02,
1922 0x60 /* SPC-3 (no version claimed) */
1923 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 u8 hdr[] = {
1925 TYPE_DISK,
1926 0,
1927 0x5, /* claim SPC-3 version compatibility */
1928 2,
1929 95 - 4
1930 };
1931
Tejun Heo87340e92008-04-28 17:48:51 +09001932 VPRINTK("ENTER\n");
1933
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 /* set scsi removeable (RMB) bit per ata bit */
1935 if (ata_id_removeable(args->id))
1936 hdr[1] |= (1 << 7);
1937
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001939 memcpy(&rbuf[8], "ATA ", 8);
1940 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1941 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942
Tejun Heo87340e92008-04-28 17:48:51 +09001943 if (rbuf[32] == 0 || rbuf[32] == ' ')
1944 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945
Tejun Heo87340e92008-04-28 17:48:51 +09001946 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947
1948 return 0;
1949}
1950
1951/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001952 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 * @args: device IDENTIFY data / SCSI command of interest.
1954 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001956 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 *
1958 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001959 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 */
Tejun Heo87340e92008-04-28 17:48:51 +09001961static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962{
1963 const u8 pages[] = {
1964 0x00, /* page 0x00, this page */
1965 0x80, /* page 0x80, unit serial no page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001966 0x83, /* page 0x83, device ident page */
1967 0x89, /* page 0x89, ata info page */
Christoph Hellwig18f0f972009-11-17 10:00:47 -05001968 0xb0, /* page 0xb0, block limits page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001969 0xb1, /* page 0xb1, block device characteristics page */
Martin K. Petersen02e0a602010-09-10 01:23:18 -04001970 0xb2, /* page 0xb2, thin provisioning page */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971 };
Tejun Heo87340e92008-04-28 17:48:51 +09001972
Jeff Garzikb142eb62006-03-21 20:37:47 -05001973 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09001974 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 return 0;
1976}
1977
1978/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001979 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 * @args: device IDENTIFY data / SCSI command of interest.
1981 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982 *
1983 * Returns ATA device serial number.
1984 *
1985 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001986 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 */
Tejun Heo87340e92008-04-28 17:48:51 +09001988static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989{
1990 const u8 hdr[] = {
1991 0,
1992 0x80, /* this page code */
1993 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001994 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995 };
Tejun Heo87340e92008-04-28 17:48:51 +09001996
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001998 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1999 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 return 0;
2001}
2002
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002004 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 * @args: device IDENTIFY data / SCSI command of interest.
2006 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05002008 * Yields two logical unit device identification designators:
2009 * - vendor specific ASCII containing the ATA serial number
2010 * - SAT defined "t10 vendor id based" containing ASCII vendor
2011 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 *
2013 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002014 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 */
Tejun Heo87340e92008-04-28 17:48:51 +09002016static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017{
Jeff Garzikb142eb62006-03-21 20:37:47 -05002018 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09002019 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05002020
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05002022 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023
Tejun Heo87340e92008-04-28 17:48:51 +09002024 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2025 rbuf[num + 0] = 2;
2026 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2027 num += 4;
2028 ata_id_string(args->id, (unsigned char *) rbuf + num,
2029 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2030 num += ATA_ID_SERNO_LEN;
2031
2032 /* SAT defined lu model and serial numbers descriptor */
2033 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2034 rbuf[num + 0] = 2;
2035 rbuf[num + 1] = 1;
2036 rbuf[num + 3] = sat_model_serial_desc_len;
2037 num += 4;
2038 memcpy(rbuf + num, "ATA ", 8);
2039 num += 8;
2040 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2041 ATA_ID_PROD_LEN);
2042 num += ATA_ID_PROD_LEN;
2043 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2044 ATA_ID_SERNO_LEN);
2045 num += ATA_ID_SERNO_LEN;
2046
Jeff Garzikb142eb62006-03-21 20:37:47 -05002047 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 return 0;
2049}
2050
2051/**
Jeff Garzikad355b42007-09-21 20:38:03 -04002052 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2053 * @args: device IDENTIFY data / SCSI command of interest.
2054 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04002055 *
2056 * Yields SAT-specified ATA VPD page.
2057 *
2058 * LOCKING:
2059 * spin_lock_irqsave(host lock)
2060 */
Tejun Heo87340e92008-04-28 17:48:51 +09002061static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04002062{
Jeff Garzikad355b42007-09-21 20:38:03 -04002063 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04002064
Jeff Garzikad355b42007-09-21 20:38:03 -04002065 memset(&tf, 0, sizeof(tf));
2066
Tejun Heo87340e92008-04-28 17:48:51 +09002067 rbuf[1] = 0x89; /* our page code */
2068 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2069 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04002070
Tejun Heo87340e92008-04-28 17:48:51 +09002071 memcpy(&rbuf[8], "linux ", 8);
2072 memcpy(&rbuf[16], "libata ", 16);
2073 memcpy(&rbuf[32], DRV_VERSION, 4);
2074 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04002075
2076 /* we don't store the ATA device signature, so we fake it */
2077
2078 tf.command = ATA_DRDY; /* really, this is Status reg */
2079 tf.lbal = 0x1;
2080 tf.nsect = 0x1;
2081
Tejun Heo87340e92008-04-28 17:48:51 +09002082 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2083 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04002084
Tejun Heo87340e92008-04-28 17:48:51 +09002085 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04002086
Tejun Heo87340e92008-04-28 17:48:51 +09002087 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04002088 return 0;
2089}
2090
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002091static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2092{
Grant Grundler295124d2010-08-17 10:56:53 -07002093 u16 min_io_sectors;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002094
2095 rbuf[1] = 0xb0;
2096 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2097
2098 /*
2099 * Optimal transfer length granularity.
2100 *
2101 * This is always one physical block, but for disks with a smaller
2102 * logical than physical sector size we need to figure out what the
2103 * latter is.
2104 */
Grant Grundler295124d2010-08-17 10:56:53 -07002105 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002106 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2107
2108 /*
2109 * Optimal unmap granularity.
2110 *
2111 * The ATA spec doesn't even know about a granularity or alignment
2112 * for the TRIM command. We can leave away most of the unmap related
2113 * VPD page entries, but we have specifify a granularity to signal
2114 * that we support some form of unmap - in thise case via WRITE SAME
2115 * with the unmap bit set.
2116 */
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002117 if (ata_id_has_trim(args->id)) {
2118 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002119 put_unaligned_be32(1, &rbuf[28]);
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002120 }
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002121
2122 return 0;
2123}
2124
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002125static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2126{
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002127 int form_factor = ata_id_form_factor(args->id);
2128 int media_rotation_rate = ata_id_rotation_rate(args->id);
2129
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002130 rbuf[1] = 0xb1;
2131 rbuf[3] = 0x3c;
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002132 rbuf[4] = media_rotation_rate >> 8;
2133 rbuf[5] = media_rotation_rate;
2134 rbuf[7] = form_factor;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002135
2136 return 0;
2137}
2138
Martin K. Petersen02e0a602010-09-10 01:23:18 -04002139static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2140{
2141 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2142 rbuf[1] = 0xb2;
2143 rbuf[3] = 0x4;
2144 rbuf[5] = 1 << 6; /* TPWS */
2145
2146 return 0;
2147}
2148
Jeff Garzikad355b42007-09-21 20:38:03 -04002149/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002150 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 * @args: device IDENTIFY data / SCSI command of interest.
2152 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 *
2154 * No operation. Simply returns success to caller, to indicate
2155 * that the caller should successfully complete this SCSI command.
2156 *
2157 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002158 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 */
Tejun Heo87340e92008-04-28 17:48:51 +09002160static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161{
2162 VPRINTK("ENTER\n");
2163 return 0;
2164}
2165
2166/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 * ata_msense_caching - Simulate MODE SENSE caching info page
2168 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09002169 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 *
2171 * Generate a caching info page, which conditionally indicates
2172 * write caching to the SCSI layer, depending on device
2173 * capabilities.
2174 *
2175 * LOCKING:
2176 * None.
2177 */
Tejun Heo87340e92008-04-28 17:48:51 +09002178static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179{
Tejun Heo87340e92008-04-28 17:48:51 +09002180 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002182 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002184 buf[12] |= (1 << 5); /* disable read ahead */
2185 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186}
2187
2188/**
2189 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09002190 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 *
2192 * Generate a generic MODE SENSE control mode page.
2193 *
2194 * LOCKING:
2195 * None.
2196 */
Tejun Heo87340e92008-04-28 17:48:51 +09002197static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198{
Tejun Heo87340e92008-04-28 17:48:51 +09002199 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002200 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201}
2202
2203/**
2204 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07002205 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 *
2207 * Generate a generic MODE SENSE r/w error recovery page.
2208 *
2209 * LOCKING:
2210 * None.
2211 */
Tejun Heo87340e92008-04-28 17:48:51 +09002212static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213{
Tejun Heo87340e92008-04-28 17:48:51 +09002214 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002215 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216}
2217
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002218/*
2219 * We can turn this into a real blacklist if it's needed, for now just
2220 * blacklist any Maxtor BANC1G10 revision firmware
2221 */
2222static int ata_dev_supports_fua(u16 *id)
2223{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002224 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002225
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002226 if (!libata_fua)
2227 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002228 if (!ata_id_has_fua(id))
2229 return 0;
2230
Tejun Heoa0cf7332007-01-02 20:18:49 +09002231 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2232 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002233
Tejun Heo2e026712006-02-12 22:47:04 +09002234 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002235 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002236 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002237 return 1;
2238
2239 return 0; /* blacklisted */
2240}
2241
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242/**
2243 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2244 * @args: device IDENTIFY data / SCSI command of interest.
2245 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002247 * Simulate MODE SENSE commands. Assume this is invoked for direct
2248 * access devices (e.g. disks) only. There should be no block
2249 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250 *
2251 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002252 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 */
Tejun Heo87340e92008-04-28 17:48:51 +09002254static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002256 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002257 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002258 const u8 sat_blk_desc[] = {
2259 0, 0, 0, 0, /* number of blocks: sat unspecified */
2260 0,
2261 0, 0x2, 0x0 /* block length: 512 bytes */
2262 };
2263 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002264 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002265 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266
2267 VPRINTK("ENTER\n");
2268
2269 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002270 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2271 /*
2272 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002274
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002276 switch (page_control) {
2277 case 0: /* current */
2278 break; /* supported */
2279 case 3: /* saved */
2280 goto saving_not_supp;
2281 case 1: /* changeable */
2282 case 2: /* defaults */
2283 default:
2284 goto invalid_fld;
2285 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286
Tejun Heo87340e92008-04-28 17:48:51 +09002287 if (six_byte)
2288 p += 4 + (ebd ? 8 : 0);
2289 else
2290 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002292 pg = scsicmd[2] & 0x3f;
2293 spg = scsicmd[3];
2294 /*
2295 * No mode subpages supported (yet) but asking for _all_
2296 * subpages may be valid
2297 */
2298 if (spg && (spg != ALL_SUB_MPAGES))
2299 goto invalid_fld;
2300
2301 switch(pg) {
2302 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002303 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304 break;
2305
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002306 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002307 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308 break;
2309
Tejun Heo87340e92008-04-28 17:48:51 +09002310 case CONTROL_MPAGE:
2311 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002314 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002315 p += ata_msense_rw_recovery(p);
2316 p += ata_msense_caching(args->id, p);
2317 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 break;
2319
2320 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002321 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322 }
2323
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002324 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002325 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002326 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2327 dpofua = 1 << 4;
2328
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002330 rbuf[0] = p - rbuf - 1;
2331 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002332 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002333 rbuf[3] = sizeof(sat_blk_desc);
2334 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002335 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002337 unsigned int output_len = p - rbuf - 2;
2338
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002340 rbuf[1] = output_len;
2341 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002342 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002343 rbuf[7] = sizeof(sat_blk_desc);
2344 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002345 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002348
2349invalid_fld:
2350 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2351 /* "Invalid field in cbd" */
2352 return 1;
2353
2354saving_not_supp:
2355 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2356 /* "Saving parameters not supported" */
2357 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358}
2359
2360/**
2361 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2362 * @args: device IDENTIFY data / SCSI command of interest.
2363 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 *
2365 * Simulate READ CAPACITY commands.
2366 *
2367 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002368 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 */
Tejun Heo87340e92008-04-28 17:48:51 +09002370static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371{
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002372 struct ata_device *dev = args->dev;
2373 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
Grant Grundler295124d2010-08-17 10:56:53 -07002374 u32 sector_size; /* physical sector size in bytes */
2375 u8 log2_per_phys;
2376 u16 lowest_aligned;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002377
Grant Grundler295124d2010-08-17 10:56:53 -07002378 sector_size = ata_id_logical_sector_size(dev->id);
2379 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2380 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381
2382 VPRINTK("ENTER\n");
2383
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002385 if (last_lba >= 0xffffffffULL)
2386 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002387
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002389 rbuf[0] = last_lba >> (8 * 3);
2390 rbuf[1] = last_lba >> (8 * 2);
2391 rbuf[2] = last_lba >> (8 * 1);
2392 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393
2394 /* sector size */
Grant Grundler295124d2010-08-17 10:56:53 -07002395 rbuf[4] = sector_size >> (8 * 3);
2396 rbuf[5] = sector_size >> (8 * 2);
2397 rbuf[6] = sector_size >> (8 * 1);
2398 rbuf[7] = sector_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399 } else {
2400 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002401 rbuf[0] = last_lba >> (8 * 7);
2402 rbuf[1] = last_lba >> (8 * 6);
2403 rbuf[2] = last_lba >> (8 * 5);
2404 rbuf[3] = last_lba >> (8 * 4);
2405 rbuf[4] = last_lba >> (8 * 3);
2406 rbuf[5] = last_lba >> (8 * 2);
2407 rbuf[6] = last_lba >> (8 * 1);
2408 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
2410 /* sector size */
Grant Grundler295124d2010-08-17 10:56:53 -07002411 rbuf[ 8] = sector_size >> (8 * 3);
2412 rbuf[ 9] = sector_size >> (8 * 2);
2413 rbuf[10] = sector_size >> (8 * 1);
2414 rbuf[11] = sector_size;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002415
2416 rbuf[12] = 0;
Grant Grundler295124d2010-08-17 10:56:53 -07002417 rbuf[13] = log2_per_phys;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002418 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2419 rbuf[15] = lowest_aligned;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002420
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002421 if (ata_id_has_trim(args->id)) {
2422 rbuf[14] |= 0x80; /* TPE */
2423
2424 if (ata_id_has_zero_after_trim(args->id))
2425 rbuf[14] |= 0x40; /* TPRZ */
2426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 }
2428
2429 return 0;
2430}
2431
2432/**
2433 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2434 * @args: device IDENTIFY data / SCSI command of interest.
2435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 *
2437 * Simulate REPORT LUNS command.
2438 *
2439 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002440 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 */
Tejun Heo87340e92008-04-28 17:48:51 +09002442static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443{
2444 VPRINTK("ENTER\n");
2445 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2446
2447 return 0;
2448}
2449
Tejun Heo77853bf2006-01-23 13:09:36 +09002450static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002451{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002452 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002453 /* FIXME: not quite right; we don't want the
2454 * translation of taskfile registers into
2455 * a sense descriptors, since that's only
2456 * correct for ATA, not ATAPI
2457 */
Tejun Heo750426a2006-11-14 22:37:35 +09002458 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002459 }
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002460
2461 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002462 ata_qc_free(qc);
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002463}
2464
2465/* is it pointless to prefer PIO for "safety reasons"? */
2466static inline int ata_pio_use_silly(struct ata_port *ap)
2467{
2468 return (ap->flags & ATA_FLAG_PIO_DMA);
2469}
2470
2471static void atapi_request_sense(struct ata_queued_cmd *qc)
2472{
2473 struct ata_port *ap = qc->ap;
2474 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002475
2476 DPRINTK("ATAPI request sense\n");
2477
Jeff Garzika939c962005-10-05 17:09:16 -04002478 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002479 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002480
Tejun Heo127102a2008-04-07 22:47:21 +09002481#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002482 if (ap->ops->sff_tf_read)
2483 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002484#endif
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002485
2486 /* fill these in, for the case where they are -not- overwritten */
2487 cmd->sense_buffer[0] = 0x70;
2488 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2489
2490 ata_qc_reinit(qc);
2491
Tejun Heo93f8fec2007-12-05 16:43:01 +09002492 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002493 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002494 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002495 qc->dma_dir = DMA_FROM_DEVICE;
2496
Tejun Heo6e7846e2006-02-12 23:32:58 +09002497 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002498 qc->cdb[0] = REQUEST_SENSE;
2499 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2500
2501 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2502 qc->tf.command = ATA_CMD_PACKET;
2503
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002504 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002505 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002506 qc->tf.feature |= ATAPI_PKT_DMA;
2507 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002508 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002509 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2510 qc->tf.lbah = 0;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002511 }
Jeff Garzika939c962005-10-05 17:09:16 -04002512 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2513
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002514 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002515
Tejun Heo8e0e6942006-03-31 20:41:11 +09002516 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002517
2518 DPRINTK("EXIT\n");
2519}
2520
Tejun Heo77853bf2006-01-23 13:09:36 +09002521static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522{
2523 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002524 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525
Jeff Garzika7dac442005-10-30 04:44:42 -05002526 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002527
Tejun Heo246619d2006-05-15 20:58:16 +09002528 /* handle completion from new EH */
2529 if (unlikely(qc->ap->ops->error_handler &&
2530 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2531
2532 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2533 /* FIXME: not quite right; we don't want the
2534 * translation of taskfile registers into a
2535 * sense descriptors, since that's only
2536 * correct for ATA, not ATAPI
2537 */
Tejun Heo750426a2006-11-14 22:37:35 +09002538 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002539 }
2540
Tejun Heo22aac082006-08-08 14:08:59 +09002541 /* SCSI EH automatically locks door if sdev->locked is
2542 * set. Sometimes door lock request continues to
2543 * fail, for example, when no media is present. This
2544 * creates a loop - SCSI EH issues door lock which
2545 * fails and gets invoked again to acquire sense data
2546 * for the failed command.
2547 *
2548 * If door lock fails, always clear sdev->locked to
2549 * avoid this infinite loop.
Tejun Heo2a5f07b2010-11-01 11:39:19 +01002550 *
2551 * This may happen before SCSI scan is complete. Make
2552 * sure qc->dev->sdev isn't NULL before dereferencing.
Tejun Heo22aac082006-08-08 14:08:59 +09002553 */
Tejun Heo2a5f07b2010-11-01 11:39:19 +01002554 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
Tejun Heo22aac082006-08-08 14:08:59 +09002555 qc->dev->sdev->locked = 0;
2556
Tejun Heo246619d2006-05-15 20:58:16 +09002557 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2558 qc->scsidone(cmd);
2559 ata_qc_free(qc);
2560 return;
2561 }
2562
2563 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002564 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002566 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002567 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002568 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002569 /* FIXME: not quite right; we don't want the
2570 * translation of taskfile registers into
2571 * a sense descriptors, since that's only
2572 * correct for ATA, not ATAPI
2573 */
Tejun Heo750426a2006-11-14 22:37:35 +09002574 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002575 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576 u8 *scsicmd = cmd->cmnd;
2577
Tony Battersbyfd71da42005-12-21 16:35:44 -05002578 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002579 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002580 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002581
Tejun Heo87340e92008-04-28 17:48:51 +09002582 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002583
2584 /* ATAPI devices typically report zero for their SCSI version,
2585 * and sometimes deviate from the spec WRT response data
2586 * format. If SCSI version is reported as zero like normal,
2587 * then we make the following fixups: 1) Fake MMC-5 version,
2588 * to indicate to the Linux scsi midlayer this is a modern
2589 * device. 2) Ensure response data format / ATAPI information
2590 * are always correct.
2591 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002592 if (buf[2] == 0) {
2593 buf[2] = 0x5;
2594 buf[3] = 0x32;
2595 }
2596
Tejun Heo87340e92008-04-28 17:48:51 +09002597 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002599
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 cmd->result = SAM_STAT_GOOD;
2601 }
2602
2603 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002604 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605}
2606/**
2607 * atapi_xlat - Initialize PACKET taskfile
2608 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002609 *
2610 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002611 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612 *
2613 * RETURNS:
2614 * Zero on success, non-zero on failure.
2615 */
Tejun Heoad706992006-12-17 10:45:57 +09002616static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002617{
Tejun Heo542b1442006-12-17 10:45:08 +09002618 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002620 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002621 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002622 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623
Tejun Heo2e5704f2006-12-17 10:46:33 +09002624 memset(qc->cdb, 0, dev->cdb_len);
2625 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002626
2627 qc->complete_fn = atapi_qc_complete;
2628
2629 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002630 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002631 qc->tf.flags |= ATA_TFLAG_WRITE;
2632 DPRINTK("direction: write\n");
2633 }
2634
2635 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002636 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002638 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002639 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002640 using_pio = 1;
2641
Tejun Heoe1902222007-11-26 20:58:02 +09002642 /* Some controller variants snoop this value for Packet
2643 * transfers to do state machine and FIFO management. Thus we
2644 * want to set it properly, and for DMA where it is
2645 * effectively meaningless.
2646 */
Tejun Heoaacda372008-03-18 17:47:43 +09002647 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002648
Tejun Heoe1902222007-11-26 20:58:02 +09002649 /* Most ATAPI devices which honor transfer chunk size don't
2650 * behave according to the spec when odd chunk size which
2651 * matches the transfer length is specified. If the number of
2652 * bytes to transfer is 2n+1. According to the spec, what
2653 * should happen is to indicate that 2n+1 is going to be
2654 * transferred and transfer 2n+2 bytes where the last byte is
2655 * padding.
2656 *
2657 * In practice, this doesn't happen. ATAPI devices first
2658 * indicate and transfer 2n bytes and then indicate and
2659 * transfer 2 bytes where the last byte is padding.
2660 *
2661 * This inconsistency confuses several controllers which
2662 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2663 * These controllers use actual number of transferred bytes to
2664 * update DMA poitner and transfer of 4n+2 bytes make those
2665 * controller push DMA pointer by 4n+4 bytes because SATA data
2666 * FISes are aligned to 4 bytes. This causes data corruption
2667 * and buffer overrun.
2668 *
2669 * Always setting nbytes to even number solves this problem
2670 * because then ATAPI devices don't have to split data at 2n
2671 * boundaries.
2672 */
2673 if (nbytes & 0x1)
2674 nbytes++;
2675
Alan Cox2db78dd2007-10-02 13:53:04 -07002676 qc->tf.lbam = (nbytes & 0xFF);
2677 qc->tf.lbah = (nbytes >> 8);
2678
Tejun Heo5895ef92008-06-17 12:36:26 +09002679 if (nodata)
2680 qc->tf.protocol = ATAPI_PROT_NODATA;
2681 else if (using_pio)
2682 qc->tf.protocol = ATAPI_PROT_PIO;
2683 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002684 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002685 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686 qc->tf.feature |= ATAPI_PKT_DMA;
2687
Tejun Heo91163002008-02-21 13:25:50 +09002688 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2689 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002690 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692 }
2693
Alan Cox2db78dd2007-10-02 13:53:04 -07002694
2695 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2696 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697 return 0;
2698}
2699
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002700static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002701{
Tejun Heo071f44b2008-04-07 22:47:22 +09002702 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002703 if (likely(devno < ata_link_max_devices(&ap->link)))
2704 return &ap->link.device[devno];
2705 } else {
2706 if (likely(devno < ap->nr_pmp_links))
2707 return &ap->pmp_link[devno].device[0];
2708 }
2709
Tejun Heoab5b3a52006-05-31 18:27:34 +09002710 return NULL;
2711}
2712
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002713static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2714 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002715{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002716 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002717
Tejun Heo41bda9c2007-08-06 18:36:24 +09002718 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002719 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002720 if (unlikely(scsidev->channel || scsidev->lun))
2721 return NULL;
2722 devno = scsidev->id;
2723 } else {
2724 if (unlikely(scsidev->id || scsidev->lun))
2725 return NULL;
2726 devno = scsidev->channel;
2727 }
2728
2729 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002730}
2731
Linus Torvalds1da177e2005-04-16 15:20:36 -07002732/**
2733 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2734 * @ap: ATA port to which the device is attached
2735 * @scsidev: SCSI device from which we derive the ATA device
2736 *
2737 * Given various information provided in struct scsi_cmnd,
2738 * map that onto an ATA bus, and using that mapping
2739 * determine which ata_device is associated with the
2740 * SCSI command to be sent.
2741 *
2742 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002743 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002744 *
2745 * RETURNS:
2746 * Associated ATA device, or %NULL if not found.
2747 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002749ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002751 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752
Tejun Heo2486fa52008-07-31 07:52:40 +09002753 if (unlikely(!dev || !ata_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 return NULL;
2755
Linus Torvalds1da177e2005-04-16 15:20:36 -07002756 return dev;
2757}
2758
Jeff Garzikb0955182005-05-12 15:45:22 -04002759/*
2760 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2761 * @byte1: Byte 1 from pass-thru CDB.
2762 *
2763 * RETURNS:
2764 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2765 */
2766static u8
2767ata_scsi_map_proto(u8 byte1)
2768{
2769 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002770 case 3: /* Non-data */
2771 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002772
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002773 case 6: /* DMA */
2774 case 10: /* UDMA Data-in */
2775 case 11: /* UDMA Data-Out */
2776 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002777
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002778 case 4: /* PIO Data-in */
2779 case 5: /* PIO Data-out */
2780 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002781
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002782 case 0: /* Hard Reset */
2783 case 1: /* SRST */
2784 case 8: /* Device Diagnostic */
2785 case 9: /* Device Reset */
2786 case 7: /* DMA Queued */
2787 case 12: /* FPDMA */
2788 case 15: /* Return Response Info */
2789 default: /* Reserved */
2790 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002791 }
2792
2793 return ATA_PROT_UNKNOWN;
2794}
2795
2796/**
2797 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2798 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002799 *
2800 * Handles either 12 or 16-byte versions of the CDB.
2801 *
2802 * RETURNS:
2803 * Zero on success, non-zero on failure.
2804 */
Tejun Heoad706992006-12-17 10:45:57 +09002805static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002806{
2807 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002808 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002809 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002810 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002811
Tejun Heo542b1442006-12-17 10:45:08 +09002812 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002813 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002814
Alan Coxae8d4ee2007-11-04 22:05:49 -05002815 /*
Jeff Garzikb0955182005-05-12 15:45:22 -04002816 * 12 and 16 byte CDBs use different offsets to
2817 * provide the various register values.
2818 */
Tejun Heo542b1442006-12-17 10:45:08 +09002819 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002820 /*
2821 * 16-byte CDB - may contain extended commands.
2822 *
2823 * If that is the case, copy the upper byte register values.
2824 */
Tejun Heo542b1442006-12-17 10:45:08 +09002825 if (cdb[1] & 0x01) {
2826 tf->hob_feature = cdb[3];
2827 tf->hob_nsect = cdb[5];
2828 tf->hob_lbal = cdb[7];
2829 tf->hob_lbam = cdb[9];
2830 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002831 tf->flags |= ATA_TFLAG_LBA48;
2832 } else
2833 tf->flags &= ~ATA_TFLAG_LBA48;
2834
2835 /*
2836 * Always copy low byte, device and command registers.
2837 */
Tejun Heo542b1442006-12-17 10:45:08 +09002838 tf->feature = cdb[4];
2839 tf->nsect = cdb[6];
2840 tf->lbal = cdb[8];
2841 tf->lbam = cdb[10];
2842 tf->lbah = cdb[12];
2843 tf->device = cdb[13];
2844 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002845 } else {
2846 /*
2847 * 12-byte CDB - incapable of extended commands.
2848 */
2849 tf->flags &= ~ATA_TFLAG_LBA48;
2850
Tejun Heo542b1442006-12-17 10:45:08 +09002851 tf->feature = cdb[3];
2852 tf->nsect = cdb[4];
2853 tf->lbal = cdb[5];
2854 tf->lbam = cdb[6];
2855 tf->lbah = cdb[7];
2856 tf->device = cdb[8];
2857 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002858 }
Albert Leefa4453c2007-06-07 15:52:07 +08002859
2860 /* enforce correct master/slave bit */
2861 tf->device = dev->devno ?
2862 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002863
Tejun Heobd30add2009-09-03 16:08:11 +09002864 switch (tf->command) {
Grant Grundler295124d2010-08-17 10:56:53 -07002865 /* READ/WRITE LONG use a non-standard sect_size */
Tejun Heobd30add2009-09-03 16:08:11 +09002866 case ATA_CMD_READ_LONG:
2867 case ATA_CMD_READ_LONG_ONCE:
2868 case ATA_CMD_WRITE_LONG:
2869 case ATA_CMD_WRITE_LONG_ONCE:
2870 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2871 goto invalid_fld;
2872 qc->sect_size = scsi_bufflen(scmd);
Grant Grundler295124d2010-08-17 10:56:53 -07002873 break;
2874
2875 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2876 case ATA_CMD_CFA_WRITE_NE:
2877 case ATA_CMD_CFA_TRANS_SECT:
2878 case ATA_CMD_CFA_WRITE_MULT_NE:
2879 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2880 case ATA_CMD_READ:
2881 case ATA_CMD_READ_EXT:
2882 case ATA_CMD_READ_QUEUED:
2883 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2884 case ATA_CMD_FPDMA_READ:
2885 case ATA_CMD_READ_MULTI:
2886 case ATA_CMD_READ_MULTI_EXT:
2887 case ATA_CMD_PIO_READ:
2888 case ATA_CMD_PIO_READ_EXT:
2889 case ATA_CMD_READ_STREAM_DMA_EXT:
2890 case ATA_CMD_READ_STREAM_EXT:
2891 case ATA_CMD_VERIFY:
2892 case ATA_CMD_VERIFY_EXT:
2893 case ATA_CMD_WRITE:
2894 case ATA_CMD_WRITE_EXT:
2895 case ATA_CMD_WRITE_FUA_EXT:
2896 case ATA_CMD_WRITE_QUEUED:
2897 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2898 case ATA_CMD_FPDMA_WRITE:
2899 case ATA_CMD_WRITE_MULTI:
2900 case ATA_CMD_WRITE_MULTI_EXT:
2901 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2902 case ATA_CMD_PIO_WRITE:
2903 case ATA_CMD_PIO_WRITE_EXT:
2904 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2905 case ATA_CMD_WRITE_STREAM_EXT:
2906 qc->sect_size = scmd->device->sector_size;
2907 break;
2908
2909 /* Everything else uses 512 byte "sectors" */
2910 default:
2911 qc->sect_size = ATA_SECT_SIZE;
Tejun Heobd30add2009-09-03 16:08:11 +09002912 }
2913
2914 /*
2915 * Set flags so that all registers will be written, pass on
2916 * write indication (used for PIO/DMA setup), result TF is
2917 * copied back and we don't whine too much about its failure.
2918 */
Douglas Gilbertbc496ed2010-02-01 13:11:38 -05002919 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heobd30add2009-09-03 16:08:11 +09002920 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2921 tf->flags |= ATA_TFLAG_WRITE;
2922
2923 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2924
2925 /*
2926 * Set transfer length.
2927 *
2928 * TODO: find out if we need to do more here to
2929 * cover scatter/gather case.
2930 */
2931 ata_qc_set_pc_nbytes(qc);
2932
2933 /* We may not issue DMA commands if no DMA mode is set */
2934 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2935 goto invalid_fld;
2936
Albert Lee1dce5892007-06-07 15:49:22 +08002937 /* sanity check for pio multi commands */
2938 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2939 goto invalid_fld;
2940
2941 if (is_multi_taskfile(tf)) {
2942 unsigned int multi_count = 1 << (cdb[1] >> 5);
2943
2944 /* compare the passed through multi_count
2945 * with the cached multi_count of libata
2946 */
2947 if (multi_count != dev->multi_count)
2948 ata_dev_printk(dev, KERN_WARNING,
2949 "invalid multi_count %u ignored\n",
2950 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002951 }
Albert Lee1dce5892007-06-07 15:49:22 +08002952
Jeff Garzikb0955182005-05-12 15:45:22 -04002953 /*
2954 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2955 * SET_FEATURES - XFER MODE must be preceded/succeeded
2956 * by an update to hardware-specific registers for each
2957 * controller (i.e. the reason for ->set_piomode(),
2958 * ->set_dmamode(), and ->post_set_mode() hooks).
2959 */
Tejun Heobd30add2009-09-03 16:08:11 +09002960 if (tf->command == ATA_CMD_SET_FEATURES &&
2961 tf->feature == SETFEATURES_XFER)
Tejun Heo9a405252005-12-02 11:49:11 +09002962 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002963
2964 /*
Tejun Heobd30add2009-09-03 16:08:11 +09002965 * Filter TPM commands by default. These provide an
2966 * essentially uncontrolled encrypted "back door" between
2967 * applications and the disk. Set libata.allow_tpm=1 if you
2968 * have a real reason for wanting to use them. This ensures
2969 * that installed software cannot easily mess stuff up without
2970 * user intent. DVR type users will probably ship with this enabled
2971 * for movie content management.
Jeff Garzikb0955182005-05-12 15:45:22 -04002972 *
Tejun Heobd30add2009-09-03 16:08:11 +09002973 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2974 * for this and should do in future but that it is not sufficient as
2975 * DCS is an optional feature set. Thus we also do the software filter
2976 * so that we comply with the TC consortium stated goal that the user
2977 * can turn off TC features of their system.
Jeff Garzikb0955182005-05-12 15:45:22 -04002978 */
Tejun Heobd30add2009-09-03 16:08:11 +09002979 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2980 goto invalid_fld;
Tejun Heoe61e0672006-05-15 20:57:40 +09002981
Jeff Garzikb0955182005-05-12 15:45:22 -04002982 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002983
2984 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002985 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002986 /* "Invalid field in cdb" */
2987 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002988}
2989
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002990static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
2991{
2992 struct ata_taskfile *tf = &qc->tf;
2993 struct scsi_cmnd *scmd = qc->scsicmd;
2994 struct ata_device *dev = qc->dev;
2995 const u8 *cdb = scmd->cmnd;
2996 u64 block;
2997 u32 n_block;
2998 u32 size;
2999 void *buf;
3000
3001 /* we may not issue DMA commands if no DMA mode is set */
3002 if (unlikely(!dev->dma_mode))
3003 goto invalid_fld;
3004
3005 if (unlikely(scmd->cmd_len < 16))
3006 goto invalid_fld;
3007 scsi_16_lba_len(cdb, &block, &n_block);
3008
3009 /* for now we only support WRITE SAME with the unmap bit set */
3010 if (unlikely(!(cdb[1] & 0x8)))
3011 goto invalid_fld;
3012
3013 /*
3014 * WRITE SAME always has a sector sized buffer as payload, this
3015 * should never be a multiple entry S/G list.
3016 */
3017 if (!scsi_sg_count(scmd))
3018 goto invalid_fld;
3019
3020 buf = page_address(sg_page(scsi_sglist(scmd)));
Martin K. Petersend0634c42009-11-26 12:00:43 -05003021 size = ata_set_lba_range_entries(buf, 512, block, n_block);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003022
3023 tf->protocol = ATA_PROT_DMA;
3024 tf->hob_feature = 0;
3025 tf->feature = ATA_DSM_TRIM;
3026 tf->hob_nsect = (size / 512) >> 8;
3027 tf->nsect = size / 512;
3028 tf->command = ATA_CMD_DSM;
3029 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3030 ATA_TFLAG_WRITE;
3031
3032 ata_qc_set_pc_nbytes(qc);
3033
3034 return 0;
3035
3036 invalid_fld:
3037 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3038 /* "Invalid field in cdb" */
3039 return 1;
3040}
3041
Linus Torvalds1da177e2005-04-16 15:20:36 -07003042/**
3043 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3044 * @dev: ATA device
3045 * @cmd: SCSI command opcode to consider
3046 *
3047 * Look up the SCSI command given, and determine whether the
3048 * SCSI command is to be translated or simulated.
3049 *
3050 * RETURNS:
3051 * Pointer to translation function if possible, %NULL if not.
3052 */
3053
3054static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3055{
3056 switch (cmd) {
3057 case READ_6:
3058 case READ_10:
3059 case READ_16:
3060
3061 case WRITE_6:
3062 case WRITE_10:
3063 case WRITE_16:
3064 return ata_scsi_rw_xlat;
3065
Christoph Hellwig0cdd6eb2009-12-10 10:36:01 +01003066 case WRITE_SAME_16:
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003067 return ata_scsi_write_same_xlat;
3068
Linus Torvalds1da177e2005-04-16 15:20:36 -07003069 case SYNCHRONIZE_CACHE:
3070 if (ata_try_flush_cache(dev))
3071 return ata_scsi_flush_xlat;
3072 break;
3073
3074 case VERIFY:
3075 case VERIFY_16:
3076 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04003077
3078 case ATA_12:
3079 case ATA_16:
3080 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04003081
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04003082 case START_STOP:
3083 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084 }
3085
3086 return NULL;
3087}
3088
3089/**
3090 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3091 * @ap: ATA port to which the command was being sent
3092 * @cmd: SCSI command to dump
3093 *
3094 * Prints the contents of a SCSI command via printk().
3095 */
3096
3097static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3098 struct scsi_cmnd *cmd)
3099{
3100#ifdef ATA_DEBUG
3101 struct scsi_device *scsidev = cmd->device;
3102 u8 *scsicmd = cmd->cmnd;
3103
3104 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09003105 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106 scsidev->channel, scsidev->id, scsidev->lun,
3107 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3108 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3109 scsicmd[8]);
3110#endif
3111}
3112
Tejun Heo542b1442006-12-17 10:45:08 +09003113static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09003114 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06003115{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003116 u8 scsi_op = scmd->cmnd[0];
3117 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09003118 int rc = 0;
3119
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003120 if (dev->class == ATA_DEV_ATA) {
3121 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3122 goto bad_cdb_len;
3123
3124 xlat_func = ata_get_xlat_func(dev, scsi_op);
3125 } else {
3126 if (unlikely(!scmd->cmd_len))
3127 goto bad_cdb_len;
3128
3129 xlat_func = NULL;
3130 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3131 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09003132 int len = COMMAND_SIZE(scsi_op);
3133 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003134 goto bad_cdb_len;
3135
3136 xlat_func = atapi_xlat;
3137 } else {
3138 /* ATA_16 passthru, treat as an ATA command */
3139 if (unlikely(scmd->cmd_len > 16))
3140 goto bad_cdb_len;
3141
3142 xlat_func = ata_get_xlat_func(dev, scsi_op);
3143 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09003144 }
3145
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003146 if (xlat_func)
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003147 rc = ata_scsi_translate(dev, scmd, xlat_func);
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003148 else
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003149 ata_scsi_simulate(dev, scmd);
Tejun Heo2115ea92006-05-15 21:03:39 +09003150
3151 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003152
3153 bad_cdb_len:
3154 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3155 scmd->cmd_len, scsi_op, dev->cdb_len);
3156 scmd->result = DID_ERROR << 16;
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003157 scmd->scsi_done(scmd);
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003158 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06003159}
3160
Linus Torvalds1da177e2005-04-16 15:20:36 -07003161/**
3162 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
Jeff Garzik23e701e2010-11-17 12:03:58 -05003163 * @shost: SCSI host of command to be sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07003164 * @cmd: SCSI command to be sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165 *
3166 * In some cases, this function translates SCSI commands into
3167 * ATA taskfiles, and queues the taskfiles to be sent to
3168 * hardware. In other cases, this function simulates a
3169 * SCSI device by evaluating and responding to certain
3170 * SCSI commands. This creates the overall effect of
3171 * ATA and ATAPI devices appearing as SCSI devices.
3172 *
3173 * LOCKING:
Jeff Garzik23e701e2010-11-17 12:03:58 -05003174 * ATA host lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07003175 *
3176 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09003177 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3178 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003179 */
Jeff Garzik23e701e2010-11-17 12:03:58 -05003180int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181{
3182 struct ata_port *ap;
3183 struct ata_device *dev;
3184 struct scsi_device *scsidev = cmd->device;
Tejun Heo2115ea92006-05-15 21:03:39 +09003185 int rc = 0;
Jeff Garzik23e701e2010-11-17 12:03:58 -05003186 unsigned long irq_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003187
Jeff Garzik35bb94b2006-04-11 13:12:34 -04003188 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003189
Jeff Garzik23e701e2010-11-17 12:03:58 -05003190 spin_lock_irqsave(ap->lock, irq_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003191
3192 ata_scsi_dump_cdb(ap, cmd);
3193
3194 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003195 if (likely(dev))
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003196 rc = __ata_scsi_queuecmd(cmd, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003197 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003198 cmd->result = (DID_BAD_TARGET << 16);
Jeff Garzik23e701e2010-11-17 12:03:58 -05003199 cmd->scsi_done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200 }
3201
Jeff Garzik23e701e2010-11-17 12:03:58 -05003202 spin_unlock_irqrestore(ap->lock, irq_flags);
3203
Tejun Heo2115ea92006-05-15 21:03:39 +09003204 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003205}
3206
3207/**
3208 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003209 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210 * @cmd: SCSI command being sent to device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003211 *
3212 * Interprets and directly executes a select list of SCSI commands
3213 * that can be handled internally.
3214 *
3215 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003216 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003217 */
3218
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003219void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003220{
3221 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04003222 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04003223 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224
Tejun Heo9a3dccc2006-01-06 09:56:18 +01003225 args.dev = dev;
3226 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003227 args.cmd = cmd;
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003228 args.done = cmd->scsi_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229
3230 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003231 /* TODO: worth improving? */
3232 case FORMAT_UNIT:
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003233 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003234 break;
3235
3236 case INQUIRY:
3237 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003238 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003239 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3240 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3241 else switch (scsicmd[2]) {
3242 case 0x00:
3243 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003244 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003245 case 0x80:
3246 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003248 case 0x83:
3249 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003251 case 0x89:
3252 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003253 break;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003254 case 0xb0:
3255 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3256 break;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06003257 case 0xb1:
3258 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3259 break;
Martin K. Petersen02e0a602010-09-10 01:23:18 -04003260 case 0xb2:
3261 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3262 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003263 default:
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003264 ata_scsi_invalid_field(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003265 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003266 }
3267 break;
3268
3269 case MODE_SENSE:
3270 case MODE_SENSE_10:
3271 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3272 break;
3273
3274 case MODE_SELECT: /* unconditionally return */
3275 case MODE_SELECT_10: /* bad-field-in-cdb */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003276 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003277 break;
3278
3279 case READ_CAPACITY:
3280 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3281 break;
3282
3283 case SERVICE_ACTION_IN:
3284 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3285 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3286 else
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003287 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003288 break;
3289
3290 case REPORT_LUNS:
3291 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3292 break;
3293
3294 case REQUEST_SENSE:
3295 ata_scsi_set_sense(cmd, 0, 0, 0);
3296 cmd->result = (DRIVER_SENSE << 24);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003297 cmd->scsi_done(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003298 break;
3299
3300 /* if we reach this, then writeback caching is disabled,
3301 * turning this into a no-op.
3302 */
3303 case SYNCHRONIZE_CACHE:
3304 /* fall through */
3305
3306 /* no-op's, complete with success */
3307 case REZERO_UNIT:
3308 case SEEK_6:
3309 case SEEK_10:
3310 case TEST_UNIT_READY:
3311 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3312 break;
3313
3314 case SEND_DIAGNOSTIC:
3315 tmp8 = scsicmd[1] & ~(1 << 3);
3316 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3317 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3318 else
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003319 ata_scsi_invalid_field(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003320 break;
3321
3322 /* all other commands */
3323 default:
3324 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3325 /* "Invalid command operation code" */
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003326 cmd->scsi_done(cmd);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003327 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003328 }
3329}
3330
Tejun Heof3187192007-04-17 23:44:07 +09003331int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3332{
3333 int i, rc;
3334
3335 for (i = 0; i < host->n_ports; i++) {
3336 struct ata_port *ap = host->ports[i];
3337 struct Scsi_Host *shost;
3338
3339 rc = -ENOMEM;
3340 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3341 if (!shost)
3342 goto err_alloc;
3343
3344 *(struct ata_port **)&shost->hostdata[0] = ap;
3345 ap->scsi_host = shost;
3346
Gwendal Grignoud9027472010-05-25 12:31:38 -07003347 shost->transportt = ata_scsi_transport_template;
Tejun Heof3187192007-04-17 23:44:07 +09003348 shost->unique_id = ap->print_id;
3349 shost->max_id = 16;
3350 shost->max_lun = 1;
3351 shost->max_channel = 1;
3352 shost->max_cmd_len = 16;
3353
Tejun Heo31cc23b2007-09-23 13:14:12 +09003354 /* Schedule policy is determined by ->qc_defer()
3355 * callback and it needs to see every deferred qc.
3356 * Set host_blocked to 1 to prevent SCSI midlayer from
3357 * automatically deferring requests.
3358 */
3359 shost->max_host_blocked = 1;
3360
Tejun Heof3187192007-04-17 23:44:07 +09003361 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3362 if (rc)
3363 goto err_add;
3364 }
3365
3366 return 0;
3367
3368 err_add:
3369 scsi_host_put(host->ports[i]->scsi_host);
3370 err_alloc:
3371 while (--i >= 0) {
3372 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3373
3374 scsi_remove_host(shost);
3375 scsi_host_put(shost);
3376 }
3377 return rc;
3378}
3379
Tejun Heo1ae46312007-07-16 14:29:40 +09003380void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003381{
Tejun Heo1ae46312007-07-16 14:29:40 +09003382 int tries = 5;
3383 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003384 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003385 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003386
Tejun Heo1ae46312007-07-16 14:29:40 +09003387 repeat:
Tejun Heo1eca4362008-11-03 20:03:17 +09003388 ata_for_each_link(link, ap, EDGE) {
3389 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003390 struct scsi_device *sdev;
3391 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003392
Tejun Heo1eca4362008-11-03 20:03:17 +09003393 if (dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003394 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003395
Tejun Heo41bda9c2007-08-06 18:36:24 +09003396 if (ata_is_host_link(link))
3397 id = dev->devno;
3398 else
3399 channel = link->pmp;
3400
3401 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3402 NULL);
3403 if (!IS_ERR(sdev)) {
3404 dev->sdev = sdev;
3405 scsi_device_put(sdev);
Grant Grundler295124d2010-08-17 10:56:53 -07003406 } else {
3407 dev->sdev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003408 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003409 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003410 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003411
3412 /* If we scanned while EH was in progress or allocation
3413 * failure occurred, scan would have failed silently. Check
3414 * whether all devices are attached.
3415 */
Tejun Heo1eca4362008-11-03 20:03:17 +09003416 ata_for_each_link(link, ap, EDGE) {
3417 ata_for_each_dev(dev, link, ENABLED) {
3418 if (!dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003419 goto exit_loop;
3420 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003421 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003422 exit_loop:
3423 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003424 return;
3425
3426 /* we're missing some SCSI devices */
3427 if (sync) {
3428 /* If caller requested synchrnous scan && we've made
3429 * any progress, sleep briefly and repeat.
3430 */
3431 if (dev != last_failed_dev) {
3432 msleep(100);
3433 last_failed_dev = dev;
3434 goto repeat;
3435 }
3436
3437 /* We might be failing to detect boot device, give it
3438 * a few more chances.
3439 */
3440 if (--tries) {
3441 msleep(100);
3442 goto repeat;
3443 }
3444
3445 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3446 "failed without making any progress,\n"
3447 " switching to async\n");
3448 }
3449
Tejun Heoad72cf92010-07-02 10:03:52 +02003450 queue_delayed_work(system_long_wq, &ap->hotplug_task,
Tejun Heo1ae46312007-07-16 14:29:40 +09003451 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003452}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003453
3454/**
3455 * ata_scsi_offline_dev - offline attached SCSI device
3456 * @dev: ATA device to offline attached SCSI device for
3457 *
3458 * This function is called from ata_eh_hotplug() and responsible
3459 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003460 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003461 * against clearing.
3462 *
3463 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003464 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003465 *
3466 * RETURNS:
3467 * 1 if attached SCSI device exists, 0 otherwise.
3468 */
3469int ata_scsi_offline_dev(struct ata_device *dev)
3470{
3471 if (dev->sdev) {
3472 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3473 return 1;
3474 }
3475 return 0;
3476}
Tejun Heo580b21022006-05-31 18:28:05 +09003477
3478/**
3479 * ata_scsi_remove_dev - remove attached SCSI device
3480 * @dev: ATA device to remove attached SCSI device for
3481 *
3482 * This function is called from ata_eh_scsi_hotplug() and
3483 * responsible for removing the SCSI device attached to @dev.
3484 *
3485 * LOCKING:
3486 * Kernel thread context (may sleep).
3487 */
3488static void ata_scsi_remove_dev(struct ata_device *dev)
3489{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003490 struct ata_port *ap = dev->link->ap;
Tejun Heo580b21022006-05-31 18:28:05 +09003491 struct scsi_device *sdev;
3492 unsigned long flags;
3493
3494 /* Alas, we need to grab scan_mutex to ensure SCSI device
3495 * state doesn't change underneath us and thus
3496 * scsi_device_get() always succeeds. The mutex locking can
3497 * be removed if there is __scsi_device_get() interface which
3498 * increments reference counts regardless of device state.
3499 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003500 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003501 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b21022006-05-31 18:28:05 +09003502
Jeff Garzikcca39742006-08-24 03:19:22 -04003503 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b21022006-05-31 18:28:05 +09003504 sdev = dev->sdev;
3505 dev->sdev = NULL;
3506
3507 if (sdev) {
3508 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003509 * away underneath us after the host lock and
Tejun Heo580b21022006-05-31 18:28:05 +09003510 * scan_mutex are released. Hold onto it.
3511 */
3512 if (scsi_device_get(sdev) == 0) {
3513 /* The following ensures the attached sdev is
3514 * offline on return from ata_scsi_offline_dev()
3515 * regardless it wins or loses the race
3516 * against this function.
3517 */
3518 scsi_device_set_state(sdev, SDEV_OFFLINE);
3519 } else {
3520 WARN_ON(1);
3521 sdev = NULL;
3522 }
3523 }
3524
Jeff Garzikba6a1302006-06-22 23:46:10 -04003525 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003526 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003527
3528 if (sdev) {
3529 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
Kay Sieversb9d5fc42009-01-06 10:44:43 -08003530 dev_name(&sdev->sdev_gendev));
Tejun Heo580b21022006-05-31 18:28:05 +09003531
3532 scsi_remove_device(sdev);
3533 scsi_device_put(sdev);
3534 }
3535}
3536
Tejun Heo41bda9c2007-08-06 18:36:24 +09003537static void ata_scsi_handle_link_detach(struct ata_link *link)
3538{
3539 struct ata_port *ap = link->ap;
3540 struct ata_device *dev;
3541
Tejun Heo1eca4362008-11-03 20:03:17 +09003542 ata_for_each_dev(dev, link, ALL) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003543 unsigned long flags;
3544
3545 if (!(dev->flags & ATA_DFLAG_DETACHED))
3546 continue;
3547
3548 spin_lock_irqsave(ap->lock, flags);
3549 dev->flags &= ~ATA_DFLAG_DETACHED;
3550 spin_unlock_irqrestore(ap->lock, flags);
3551
3552 ata_scsi_remove_dev(dev);
3553 }
3554}
3555
Tejun Heo580b21022006-05-31 18:28:05 +09003556/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003557 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003558 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003559 *
3560 * Tell the block layer to send a media change notification
3561 * event.
3562 *
3563 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003564 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003565 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003566void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003567{
Tejun Heo854c73a2007-09-23 13:14:11 +09003568 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003569 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3570 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003571}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003572
3573/**
Tejun Heo580b21022006-05-31 18:28:05 +09003574 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003575 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b21022006-05-31 18:28:05 +09003576 *
3577 * Perform SCSI part of hotplug. It's executed from a separate
3578 * workqueue after EH completes. This is necessary because SCSI
3579 * hot plugging requires working EH and hot unplugging is
3580 * synchronized with hot plugging with a mutex.
3581 *
3582 * LOCKING:
3583 * Kernel thread context (may sleep).
3584 */
David Howells65f27f32006-11-22 14:55:48 +00003585void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b21022006-05-31 18:28:05 +09003586{
David Howells65f27f32006-11-22 14:55:48 +00003587 struct ata_port *ap =
3588 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003589 int i;
Tejun Heo580b21022006-05-31 18:28:05 +09003590
Tejun Heob51e9e52006-06-29 01:29:30 +09003591 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b21022006-05-31 18:28:05 +09003592 DPRINTK("ENTER/EXIT - unloading\n");
3593 return;
3594 }
3595
3596 DPRINTK("ENTER\n");
Tejun Heoad72cf92010-07-02 10:03:52 +02003597 mutex_lock(&ap->scsi_scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003598
Tejun Heo41bda9c2007-08-06 18:36:24 +09003599 /* Unplug detached devices. We cannot use link iterator here
3600 * because PMP links have to be scanned even if PMP is
3601 * currently not attached. Iterate manually.
3602 */
3603 ata_scsi_handle_link_detach(&ap->link);
3604 if (ap->pmp_link)
3605 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3606 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b21022006-05-31 18:28:05 +09003607
3608 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003609 ata_scsi_scan_host(ap, 0);
Tejun Heo580b21022006-05-31 18:28:05 +09003610
Tejun Heoad72cf92010-07-02 10:03:52 +02003611 mutex_unlock(&ap->scsi_scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003612 DPRINTK("EXIT\n");
3613}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003614
3615/**
3616 * ata_scsi_user_scan - indication for user-initiated bus scan
3617 * @shost: SCSI host to scan
3618 * @channel: Channel to scan
3619 * @id: ID to scan
3620 * @lun: LUN to scan
3621 *
3622 * This function is called when user explicitly requests bus
3623 * scan. Set probe pending flag and invoke EH.
3624 *
3625 * LOCKING:
3626 * SCSI layer (we don't care)
3627 *
3628 * RETURNS:
3629 * Zero.
3630 */
Gwendal Grignoud9027472010-05-25 12:31:38 -07003631int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3632 unsigned int id, unsigned int lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003633{
3634 struct ata_port *ap = ata_shost_to_port(shost);
3635 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003636 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003637
3638 if (!ap->ops->error_handler)
3639 return -EOPNOTSUPP;
3640
Tejun Heo41bda9c2007-08-06 18:36:24 +09003641 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003642 return -EINVAL;
3643
Tejun Heo071f44b2008-04-07 22:47:22 +09003644 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003645 if (channel != SCAN_WILD_CARD && channel)
3646 return -EINVAL;
3647 devno = id;
3648 } else {
3649 if (id != SCAN_WILD_CARD && id)
3650 return -EINVAL;
3651 devno = channel;
3652 }
3653
Jeff Garzikba6a1302006-06-22 23:46:10 -04003654 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003655
Tejun Heo41bda9c2007-08-06 18:36:24 +09003656 if (devno == SCAN_WILD_CARD) {
3657 struct ata_link *link;
3658
Tejun Heo1eca4362008-11-03 20:03:17 +09003659 ata_for_each_link(link, ap, EDGE) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003660 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003661 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003662 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003663 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003664 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003665 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003666
3667 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003668 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003669 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003670 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003671 } else
3672 rc = -EINVAL;
3673 }
3674
Tejun Heo309afcb2006-09-30 18:07:17 +09003675 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003676 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003677 spin_unlock_irqrestore(ap->lock, flags);
3678 ata_port_wait_eh(ap);
3679 } else
3680 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003681
3682 return rc;
3683}
zhao, forrest3057ac32006-06-12 12:01:34 +08003684
3685/**
Tejun Heod0171262006-06-12 22:51:14 +09003686 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003687 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003688 *
Tejun Heod0171262006-06-12 22:51:14 +09003689 * After ATA pass thru (SAT) commands are executed successfully,
Tejun Heoad72cf92010-07-02 10:03:52 +02003690 * libata need to propagate the changes to SCSI layer.
zhao, forrest3057ac32006-06-12 12:01:34 +08003691 *
Tejun Heod0171262006-06-12 22:51:14 +09003692 * LOCKING:
3693 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003694 */
David Howells65f27f32006-11-22 14:55:48 +00003695void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003696{
David Howells65f27f32006-11-22 14:55:48 +00003697 struct ata_port *ap =
3698 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003699 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003700 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003701 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003702
Tejun Heoad72cf92010-07-02 10:03:52 +02003703 mutex_lock(&ap->scsi_scan_mutex);
Tejun Heof84e7e42006-11-22 11:21:31 +09003704 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003705
Tejun Heo1eca4362008-11-03 20:03:17 +09003706 ata_for_each_link(link, ap, EDGE) {
3707 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003708 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003709
Tejun Heo1eca4362008-11-03 20:03:17 +09003710 if (!sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003711 continue;
3712 if (scsi_device_get(sdev))
3713 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003714
Tejun Heo41bda9c2007-08-06 18:36:24 +09003715 spin_unlock_irqrestore(ap->lock, flags);
3716 scsi_rescan_device(&(sdev->sdev_gendev));
3717 scsi_device_put(sdev);
3718 spin_lock_irqsave(ap->lock, flags);
3719 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003720 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003721
3722 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoad72cf92010-07-02 10:03:52 +02003723 mutex_unlock(&ap->scsi_scan_mutex);
zhao, forrest3057ac32006-06-12 12:01:34 +08003724}
Brian King80289162006-08-07 14:27:31 -05003725
3726/**
3727 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003728 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003729 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003730 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003731 *
3732 * LOCKING:
3733 * PCI/etc. bus probe sem.
3734 *
3735 * RETURNS:
3736 * ata_port pointer on success / NULL on failure.
3737 */
3738
Jeff Garzikcca39742006-08-24 03:19:22 -04003739struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003740 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003741 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003742{
Tejun Heof3187192007-04-17 23:44:07 +09003743 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003744
Tejun Heof3187192007-04-17 23:44:07 +09003745 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003746 if (!ap)
3747 return NULL;
3748
Tejun Heof3187192007-04-17 23:44:07 +09003749 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003750 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003751 ap->pio_mask = port_info->pio_mask;
3752 ap->mwdma_mask = port_info->mwdma_mask;
3753 ap->udma_mask = port_info->udma_mask;
3754 ap->flags |= port_info->flags;
3755 ap->ops = port_info->port_ops;
3756 ap->cbl = ATA_CBL_SATA;
3757
Brian King80289162006-08-07 14:27:31 -05003758 return ap;
3759}
3760EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3761
3762/**
3763 * ata_sas_port_start - Set port up for dma.
3764 * @ap: Port to initialize
3765 *
3766 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003767 * initialized.
Brian King80289162006-08-07 14:27:31 -05003768 *
3769 * May be used as the port_start() entry in ata_port_operations.
3770 *
3771 * LOCKING:
3772 * Inherited from caller.
3773 */
3774int ata_sas_port_start(struct ata_port *ap)
3775{
James Bottomleydde20202008-02-19 11:36:56 +01003776 return 0;
Brian King80289162006-08-07 14:27:31 -05003777}
3778EXPORT_SYMBOL_GPL(ata_sas_port_start);
3779
3780/**
3781 * ata_port_stop - Undo ata_sas_port_start()
3782 * @ap: Port to shut down
3783 *
Brian King80289162006-08-07 14:27:31 -05003784 * May be used as the port_stop() entry in ata_port_operations.
3785 *
3786 * LOCKING:
3787 * Inherited from caller.
3788 */
3789
3790void ata_sas_port_stop(struct ata_port *ap)
3791{
Brian King80289162006-08-07 14:27:31 -05003792}
3793EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3794
3795/**
3796 * ata_sas_port_init - Initialize a SATA device
3797 * @ap: SATA port to initialize
3798 *
3799 * LOCKING:
3800 * PCI/etc. bus probe sem.
3801 *
3802 * RETURNS:
3803 * Zero on success, non-zero on error.
3804 */
3805
3806int ata_sas_port_init(struct ata_port *ap)
3807{
3808 int rc = ap->ops->port_start(ap);
3809
Tejun Heof3187192007-04-17 23:44:07 +09003810 if (!rc) {
3811 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003812 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003813 }
Brian King80289162006-08-07 14:27:31 -05003814
3815 return rc;
3816}
3817EXPORT_SYMBOL_GPL(ata_sas_port_init);
3818
3819/**
3820 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3821 * @ap: SATA port to destroy
3822 *
3823 */
3824
3825void ata_sas_port_destroy(struct ata_port *ap)
3826{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003827 if (ap->ops->port_stop)
3828 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003829 kfree(ap);
3830}
3831EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3832
3833/**
3834 * ata_sas_slave_configure - Default slave_config routine for libata devices
3835 * @sdev: SCSI device to configure
3836 * @ap: ATA port to which SCSI device is attached
3837 *
3838 * RETURNS:
3839 * Zero.
3840 */
3841
3842int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3843{
3844 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003845 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003846 return 0;
3847}
3848EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3849
3850/**
3851 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3852 * @cmd: SCSI command to be sent
Brian King80289162006-08-07 14:27:31 -05003853 * @ap: ATA port to which the command is being sent
3854 *
3855 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003856 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3857 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003858 */
3859
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003860int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
Brian King80289162006-08-07 14:27:31 -05003861{
Brian King08475a12006-11-20 13:51:56 -06003862 int rc = 0;
3863
Brian King80289162006-08-07 14:27:31 -05003864 ata_scsi_dump_cdb(ap, cmd);
3865
Tejun Heo2486fa52008-07-31 07:52:40 +09003866 if (likely(ata_dev_enabled(ap->link.device)))
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003867 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003868 else {
3869 cmd->result = (DID_BAD_TARGET << 16);
Jeff Garzikb27dcfb2010-11-17 22:56:48 -05003870 cmd->scsi_done(cmd);
Brian King80289162006-08-07 14:27:31 -05003871 }
Brian King08475a12006-11-20 13:51:56 -06003872 return rc;
Brian King80289162006-08-07 14:27:31 -05003873}
3874EXPORT_SYMBOL_GPL(ata_sas_queuecmd);