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libata: remove the done callback from ata_scsi_args
[linux-2.6-block.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
8c3d3d4b 4 * Maintained by: Tejun Heo <tj@kernel.org>
af36d7f0
JG		 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 *
1da177e4
LT		 34 */
35
5a0e3ad6 36#include <linux/slab.h>
1da177e4
LT		 37#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
38789fda 40#include <linux/export.h>
1da177e4 41#include <scsi/scsi.h>
1da177e4 42#include <scsi/scsi_host.h>
beb40487 43#include <scsi/scsi_cmnd.h>
85837ebd 44#include <scsi/scsi_eh.h>
005a5a06 45#include <scsi/scsi_device.h>
a6e6ce8e 46#include <scsi/scsi_tcq.h>
30afc84c 47#include <scsi/scsi_transport.h>
1da177e4 48#include <linux/libata.h>
b095518e 49#include <linux/hdreg.h>
2dcb407e 50#include <linux/uaccess.h>
2a6e58d2 51#include <linux/suspend.h>
18f0f978 52#include <asm/unaligned.h>
8e061784 53#include <linux/ioprio.h>
1da177e4
LT		 54
55#include "libata.h"
d9027470 56#include "libata-transport.h"
1da177e4 57
87340e98
TH		 58#define ATA_SCSI_RBUF_SIZE 4096
59
60static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
61static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 62
ad706991 63typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 64
2dcb407e 65static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 66 const struct scsi_device *scsidev);
2dcb407e 67static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 68 const struct scsi_device *scsidev);
1da177e4 69
00ac37f5
DG		 70#define RW_RECOVERY_MPAGE 0x1
71#define RW_RECOVERY_MPAGE_LEN 12
72#define CACHE_MPAGE 0x8
73#define CACHE_MPAGE_LEN 20
74#define CONTROL_MPAGE 0xa
75#define CONTROL_MPAGE_LEN 12
76#define ALL_MPAGES 0x3f
77#define ALL_SUB_MPAGES 0xff
78
79
24f75686 80static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 81 RW_RECOVERY_MPAGE,
82 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 83 (1 << 7), /* AWRE */
00ac37f5
DG		 84 0, /* read retry count */
85 0, 0, 0, 0,
86 0, /* write retry count */
87 0, 0, 0
88};
89
90static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 CACHE_MPAGE,
92 CACHE_MPAGE_LEN - 2,
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
96 0, 0, 0, 0, 0, 0, 0
97};
98
99static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE,
101 CONTROL_MPAGE_LEN - 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
106};
107
c93b263e
TH		 108static const char *ata_lpm_policy_names[] = {
109 [ATA_LPM_UNKNOWN] = "max_performance",
110 [ATA_LPM_MAX_POWER] = "max_performance",
111 [ATA_LPM_MED_POWER] = "medium_power",
112 [ATA_LPM_MIN_POWER] = "min_power",
ca77329f
KCA		 113};
114
ecd75ad5 115static ssize_t ata_scsi_lpm_store(struct device *device,
c93b263e
TH		 116 struct device_attribute *attr,
117 const char *buf, size_t count)
ca77329f 118{
ecd75ad5 119 struct Scsi_Host *shost = class_to_shost(device);
ca77329f 120 struct ata_port *ap = ata_shost_to_port(shost);
ecd75ad5
TH		 121 struct ata_link *link;
122 struct ata_device *dev;
c93b263e 123 enum ata_lpm_policy policy;
6b7ae954 124 unsigned long flags;
c93b263e
TH		 125
126 /* UNKNOWN is internal state, iterate from MAX_POWER */
127 for (policy = ATA_LPM_MAX_POWER;
128 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
129 const char *name = ata_lpm_policy_names[policy];
130
131 if (strncmp(name, buf, strlen(name)) == 0)
ca77329f 132 break;
ca77329f 133 }
c93b263e 134 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 135 return -EINVAL;
136
6b7ae954 137 spin_lock_irqsave(ap->lock, flags);
ecd75ad5
TH		 138
139 ata_for_each_link(link, ap, EDGE) {
140 ata_for_each_dev(dev, &ap->link, ENABLED) {
141 if (dev->horkage & ATA_HORKAGE_NOLPM) {
142 count = -EOPNOTSUPP;
143 goto out_unlock;
144 }
145 }
146 }
147
6b7ae954
TH		 148 ap->target_lpm_policy = policy;
149 ata_port_schedule_eh(ap);
ecd75ad5 150out_unlock:
6b7ae954 151 spin_unlock_irqrestore(ap->lock, flags);
ca77329f
KCA		 152 return count;
153}
154
c93b263e
TH		 155static ssize_t ata_scsi_lpm_show(struct device *dev,
156 struct device_attribute *attr, char *buf)
ca77329f 157{
ee959b00 158 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 159 struct ata_port *ap = ata_shost_to_port(shost);
ca77329f 160
6b7ae954 161 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 162 return -EINVAL;
163
c93b263e 164 return snprintf(buf, PAGE_SIZE, "%s\n",
6b7ae954 165 ata_lpm_policy_names[ap->target_lpm_policy]);
ca77329f 166}
ee959b00 167DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
c93b263e 168 ata_scsi_lpm_show, ata_scsi_lpm_store);
ee959b00 169EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 170
45fabbb7
EO		 171static ssize_t ata_scsi_park_show(struct device *device,
172 struct device_attribute *attr, char *buf)
173{
174 struct scsi_device *sdev = to_scsi_device(device);
175 struct ata_port *ap;
176 struct ata_link *link;
177 struct ata_device *dev;
3948b6f2 178 unsigned long now;
45fabbb7
EO		 179 unsigned int uninitialized_var(msecs);
180 int rc = 0;
181
182 ap = ata_shost_to_port(sdev->host);
183
3948b6f2 184 spin_lock_irq(ap->lock);
45fabbb7
EO		 185 dev = ata_scsi_find_dev(ap, sdev);
186 if (!dev) {
187 rc = -ENODEV;
188 goto unlock;
189 }
190 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
191 rc = -EOPNOTSUPP;
192 goto unlock;
193 }
194
195 link = dev->link;
a464189d 196 now = jiffies;
45fabbb7
EO		 197 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
198 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 199 time_after(dev->unpark_deadline, now))
200 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 201 else
202 msecs = 0;
203
204unlock:
205 spin_unlock_irq(ap->lock);
206
207 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
208}
209
210static ssize_t ata_scsi_park_store(struct device *device,
211 struct device_attribute *attr,
212 const char *buf, size_t len)
213{
214 struct scsi_device *sdev = to_scsi_device(device);
215 struct ata_port *ap;
216 struct ata_device *dev;
217 long int input;
218 unsigned long flags;
219 int rc;
220
42b9ab7a
JH		 221 rc = kstrtol(buf, 10, &input);
222 if (rc)
223 return rc;
224 if (input < -2)
45fabbb7
EO		 225 return -EINVAL;
226 if (input > ATA_TMOUT_MAX_PARK) {
227 rc = -EOVERFLOW;
228 input = ATA_TMOUT_MAX_PARK;
229 }
230
231 ap = ata_shost_to_port(sdev->host);
232
233 spin_lock_irqsave(ap->lock, flags);
234 dev = ata_scsi_find_dev(ap, sdev);
235 if (unlikely(!dev)) {
236 rc = -ENODEV;
237 goto unlock;
238 }
9162c657
HR		 239 if (dev->class != ATA_DEV_ATA &&
240 dev->class != ATA_DEV_ZAC) {
45fabbb7
EO		 241 rc = -EOPNOTSUPP;
242 goto unlock;
243 }
244
245 if (input >= 0) {
246 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
247 rc = -EOPNOTSUPP;
248 goto unlock;
249 }
250
251 dev->unpark_deadline = ata_deadline(jiffies, input);
252 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
253 ata_port_schedule_eh(ap);
254 complete(&ap->park_req_pending);
255 } else {
256 switch (input) {
257 case -1:
258 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
259 break;
260 case -2:
261 dev->flags |= ATA_DFLAG_NO_UNLOAD;
262 break;
263 }
264 }
265unlock:
266 spin_unlock_irqrestore(ap->lock, flags);
267
268 return rc ? rc : len;
269}
270DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
271 ata_scsi_park_show, ata_scsi_park_store);
272EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
273
84f95243 274static ssize_t ata_ncq_prio_enable_show(struct device *device,
9f56eca3
AM		 275 struct device_attribute *attr,
276 char *buf)
84f95243
AM		 277{
278 struct scsi_device *sdev = to_scsi_device(device);
279 struct ata_port *ap;
280 struct ata_device *dev;
281 bool ncq_prio_enable;
282 int rc = 0;
283
284 ap = ata_shost_to_port(sdev->host);
285
286 spin_lock_irq(ap->lock);
287 dev = ata_scsi_find_dev(ap, sdev);
288 if (!dev) {
289 rc = -ENODEV;
290 goto unlock;
291 }
292
293 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
294
295unlock:
296 spin_unlock_irq(ap->lock);
297
298 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
299}
300
301static ssize_t ata_ncq_prio_enable_store(struct device *device,
302 struct device_attribute *attr,
303 const char *buf, size_t len)
304{
305 struct scsi_device *sdev = to_scsi_device(device);
306 struct ata_port *ap;
307 struct ata_device *dev;
308 long int input;
84f95243
AM		 309 int rc;
310
311 rc = kstrtol(buf, 10, &input);
312 if (rc)
313 return rc;
314 if ((input < 0) || (input > 1))
315 return -EINVAL;
316
317 ap = ata_shost_to_port(sdev->host);
84f95243 318 dev = ata_scsi_find_dev(ap, sdev);
9f56eca3
AM		 319 if (unlikely(!dev))
320 return -ENODEV;
321
322 spin_lock_irq(ap->lock);
323 if (input)
324 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
325 else
326 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
327
328 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
329 dev->link->eh_info.flags |= ATA_EHI_QUIET;
330 ata_port_schedule_eh(ap);
331 spin_unlock_irq(ap->lock);
332
333 ata_port_wait_eh(ap);
84f95243 334
4e647d96 335 if (input) {
9f56eca3 336 spin_lock_irq(ap->lock);
4e647d96 337 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
9f56eca3
AM		 338 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
339 rc = -EIO;
4e647d96 340 }
9f56eca3 341 spin_unlock_irq(ap->lock);
4e647d96 342 }
84f95243 343
84f95243
AM		 344 return rc ? rc : len;
345}
346
347DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
348 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
349EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
350
06dbde5f
HR		 351void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
352 u8 sk, u8 asc, u8 ascq)
f0761be3 353{
06dbde5f
HR		 354 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
355
5b01e4b9
HR		 356 if (!cmd)
357 return;
358
f0761be3
TH		 359 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
360
06dbde5f 361 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
f0761be3
TH		 362}
363
492bf621
HR		 364void ata_scsi_set_sense_information(struct ata_device *dev,
365 struct scsi_cmnd *cmd,
366 const struct ata_taskfile *tf)
367{
368 u64 information;
369
370 if (!cmd)
371 return;
372
373 information = ata_tf_read_block(tf, dev);
374 if (information == U64_MAX)
375 return;
376
377 scsi_set_sense_information(cmd->sense_buffer,
378 SCSI_SENSE_BUFFERSIZE, information);
379}
380
bcfc867d 381static void ata_scsi_set_invalid_field(struct ata_device *dev,
0df10b84 382 struct scsi_cmnd *cmd, u16 field, u8 bit)
bcfc867d
HR		 383{
384 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
8554e5e1 385 /* "Invalid field in CDB" */
bcfc867d 386 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
0df10b84 387 field, bit, 1);
bcfc867d
HR		 388}
389
7780081c
HR		 390static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
391 struct scsi_cmnd *cmd, u16 field)
392{
393 /* "Invalid field in parameter list" */
394 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
395 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
396 field, 0xff, 0);
f0761be3
TH		 397}
398
18f7ba4c
KCA		 399static ssize_t
400ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
401 const char *buf, size_t count)
402{
403 struct Scsi_Host *shost = class_to_shost(dev);
404 struct ata_port *ap = ata_shost_to_port(shost);
405 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
406 return ap->ops->em_store(ap, buf, count);
407 return -EINVAL;
408}
409
410static ssize_t
411ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
412 char *buf)
413{
414 struct Scsi_Host *shost = class_to_shost(dev);
415 struct ata_port *ap = ata_shost_to_port(shost);
416
417 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
418 return ap->ops->em_show(ap, buf);
419 return -EINVAL;
420}
ea7a5ed5 421DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
18f7ba4c
KCA		 422 ata_scsi_em_message_show, ata_scsi_em_message_store);
423EXPORT_SYMBOL_GPL(dev_attr_em_message);
424
425static ssize_t
426ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
427 char *buf)
428{
429 struct Scsi_Host *shost = class_to_shost(dev);
430 struct ata_port *ap = ata_shost_to_port(shost);
431
432 return snprintf(buf, 23, "%d\n", ap->em_message_type);
433}
434DEVICE_ATTR(em_message_type, S_IRUGO,
435 ata_scsi_em_message_type_show, NULL);
436EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
437
438static ssize_t
439ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
440 char *buf)
441{
442 struct scsi_device *sdev = to_scsi_device(dev);
443 struct ata_port *ap = ata_shost_to_port(sdev->host);
444 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
445
26cd4d65
XF		 446 if (atadev && ap->ops->sw_activity_show &&
447 (ap->flags & ATA_FLAG_SW_ACTIVITY))
18f7ba4c
KCA		 448 return ap->ops->sw_activity_show(atadev, buf);
449 return -EINVAL;
450}
451
452static ssize_t
453ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
454 const char *buf, size_t count)
455{
456 struct scsi_device *sdev = to_scsi_device(dev);
457 struct ata_port *ap = ata_shost_to_port(sdev->host);
458 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
459 enum sw_activity val;
460 int rc;
461
26cd4d65
XF		 462 if (atadev && ap->ops->sw_activity_store &&
463 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
18f7ba4c
KCA		 464 val = simple_strtoul(buf, NULL, 0);
465 switch (val) {
466 case OFF: case BLINK_ON: case BLINK_OFF:
467 rc = ap->ops->sw_activity_store(atadev, val);
468 if (!rc)
469 return count;
470 else
471 return rc;
472 }
473 }
474 return -EINVAL;
475}
ea7a5ed5 476DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
18f7ba4c
KCA		 477 ata_scsi_activity_store);
478EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
479
45fabbb7
EO		 480struct device_attribute *ata_common_sdev_attrs[] = {
481 &dev_attr_unload_heads,
84f95243 482 &dev_attr_ncq_prio_enable,
45fabbb7
EO		 483 NULL
484};
485EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
486
06dbde5f 487static void ata_scsi_invalid_field(struct ata_device *dev,
bcfc867d 488 struct scsi_cmnd *cmd, u16 field)
ae006510 489{
0df10b84 490 ata_scsi_set_invalid_field(dev, cmd, field, 0xff);
b27dcfb0 491 cmd->scsi_done(cmd);
ae006510
DG		 492}
493
1da177e4
LT		 494/**
495 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
496 * @sdev: SCSI device for which BIOS geometry is to be determined
497 * @bdev: block device associated with @sdev
498 * @capacity: capacity of SCSI device
499 * @geom: location to which geometry will be output
500 *
501 * Generic bios head/sector/cylinder calculator
502 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
503 * mapping. Some situations may arise where the disk is not
504 * bootable if this is not used.
505 *
506 * LOCKING:
507 * Defined by the SCSI layer. We don't really care.
508 *
509 * RETURNS:
510 * Zero.
511 */
512int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
513 sector_t capacity, int geom[])
514{
515 geom[0] = 255;
516 geom[1] = 63;
517 sector_div(capacity, 255*63);
518 geom[2] = capacity;
519
520 return 0;
521}
522
d8d9129e
TH		 523/**
524 * ata_scsi_unlock_native_capacity - unlock native capacity
525 * @sdev: SCSI device to adjust device capacity for
526 *
527 * This function is called if a partition on @sdev extends beyond
528 * the end of the device. It requests EH to unlock HPA.
529 *
530 * LOCKING:
531 * Defined by the SCSI layer. Might sleep.
532 */
533void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
534{
535 struct ata_port *ap = ata_shost_to_port(sdev->host);
536 struct ata_device *dev;
537 unsigned long flags;
538
539 spin_lock_irqsave(ap->lock, flags);
540
541 dev = ata_scsi_find_dev(ap, sdev);
542 if (dev && dev->n_sectors < dev->n_native_sectors) {
543 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
544 dev->link->eh_info.action |= ATA_EH_RESET;
545 ata_port_schedule_eh(ap);
546 }
547
548 spin_unlock_irqrestore(ap->lock, flags);
549 ata_port_wait_eh(ap);
550}
551
5924b74c
TH		 552/**
553 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 554 * @ap: target port
5924b74c
TH		 555 * @sdev: SCSI device to get identify data for
556 * @arg: User buffer area for identify data
557 *
558 * LOCKING:
559 * Defined by the SCSI layer. We don't really care.
560 *
561 * RETURNS:
562 * Zero on success, negative errno on error.
563 */
94be9a58
JG		 564static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
565 void __user *arg)
5924b74c 566{
5924b74c
TH		 567 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
568 u16 __user *dst = arg;
569 char buf[40];
570
571 if (!dev)
572 return -ENOMSG;
573
574 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
575 return -EFAULT;
576
577 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
578 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
579 return -EFAULT;
580
581 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
582 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
583 return -EFAULT;
584
585 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
586 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
587 return -EFAULT;
588
589 return 0;
590}
591
b095518e
JG		 592/**
593 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 594 * @scsidev: Device to which we are issuing command
b095518e
JG		 595 * @arg: User provided data for issuing command
596 *
597 * LOCKING:
598 * Defined by the SCSI layer. We don't really care.
599 *
600 * RETURNS:
601 * Zero on success, negative errno on error.
602 */
b095518e
JG		 603int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
604{
605 int rc = 0;
606 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 607 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 608 int argsize = 0;
85837ebd 609 enum dma_data_direction data_dir;
bbe1fe7e 610 int cmd_result;
b095518e 611
c893a3ae 612 if (arg == NULL)
b095518e
JG		 613 return -EINVAL;
614
615 if (copy_from_user(args, arg, sizeof(args)))
616 return -EFAULT;
617
bbe1fe7e
ET		 618 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
619 if (!sensebuf)
620 return -ENOMEM;
621
b095518e
JG		 622 memset(scsi_cmd, 0, sizeof(scsi_cmd));
623
624 if (args[3]) {
295124dc 625 argsize = ATA_SECT_SIZE * args[3];
b095518e 626 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 627 if (argbuf == NULL) {
628 rc = -ENOMEM;
629 goto error;
630 }
b095518e
JG		 631
632 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
633 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 634 block count in sector count field */
85837ebd 635 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 636 } else {
637 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 638 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 639 data_dir = DMA_NONE;
b095518e
JG		 640 }
641
642 scsi_cmd[0] = ATA_16;
643
644 scsi_cmd[4] = args[2];
a4f19040 645 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 646 scsi_cmd[6] = args[3];
647 scsi_cmd[8] = args[1];
648 scsi_cmd[10] = 0x4f;
649 scsi_cmd[12] = 0xc2;
650 } else {
651 scsi_cmd[6] = args[1];
652 }
653 scsi_cmd[14] = args[0];
654
655 /* Good values for timeout and retries? Values below
656 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 657 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 658 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 659
660 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
661 u8 *desc = sensebuf + 8;
662 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
663
664 /* If we set cc then ATA pass-through will cause a
665 * check condition even if no error. Filter that. */
666 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
667 struct scsi_sense_hdr sshdr;
668 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e 669 &sshdr);
6d3bfc7b
KM		 670 if (sshdr.sense_key == RECOVERED_ERROR &&
671 sshdr.asc == 0 && sshdr.ascq == 0x1d)
bbe1fe7e
ET		 672 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
673 }
674
675 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 676 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
677 desc[0] == 0x09) { /* code is "ATA Descriptor" */
678 args[0] = desc[13]; /* status */
679 args[1] = desc[3]; /* error */
680 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 681 if (copy_to_user(arg, args, sizeof(args)))
682 rc = -EFAULT;
683 }
684 }
685
686
687 if (cmd_result) {
b095518e
JG		 688 rc = -EIO;
689 goto error;
690 }
691
b095518e 692 if ((argbuf)
c893a3ae 693 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 694 rc = -EFAULT;
695error:
bbe1fe7e 696 kfree(sensebuf);
8f760780 697 kfree(argbuf);
b095518e
JG		 698 return rc;
699}
700
701/**
702 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 703 * @scsidev: Device to which we are issuing command
b095518e
JG		 704 * @arg: User provided data for issuing command
705 *
706 * LOCKING:
707 * Defined by the SCSI layer. We don't really care.
708 *
709 * RETURNS:
710 * Zero on success, negative errno on error.
711 */
712int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
713{
714 int rc = 0;
715 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 716 u8 args[7], *sensebuf = NULL;
717 int cmd_result;
b095518e 718
c893a3ae 719 if (arg == NULL)
b095518e
JG		 720 return -EINVAL;
721
722 if (copy_from_user(args, arg, sizeof(args)))
723 return -EFAULT;
724
af068bd1
DM		 725 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
726 if (!sensebuf)
727 return -ENOMEM;
728
b095518e
JG		 729 memset(scsi_cmd, 0, sizeof(scsi_cmd));
730 scsi_cmd[0] = ATA_16;
731 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 732 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 733 scsi_cmd[4] = args[1];
734 scsi_cmd[6] = args[2];
735 scsi_cmd[8] = args[3];
736 scsi_cmd[10] = args[4];
737 scsi_cmd[12] = args[5];
277239f2 738 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 739 scsi_cmd[14] = args[0];
740
b095518e 741 /* Good values for timeout and retries? Values below
2e9edbf8 742 from scsi_ioctl_send_command() for default case... */
af068bd1 743 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 744 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 745
746 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
747 u8 *desc = sensebuf + 8;
748 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
749
750 /* If we set cc then ATA pass-through will cause a
751 * check condition even if no error. Filter that. */
752 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
753 struct scsi_sense_hdr sshdr;
754 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
755 &sshdr);
6d3bfc7b
KM		 756 if (sshdr.sense_key == RECOVERED_ERROR &&
757 sshdr.asc == 0 && sshdr.ascq == 0x1d)
af068bd1
DM		 758 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
759 }
760
761 /* Send userspace ATA registers */
762 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
763 desc[0] == 0x09) {/* code is "ATA Descriptor" */
764 args[0] = desc[13]; /* status */
765 args[1] = desc[3]; /* error */
766 args[2] = desc[5]; /* sector count (0:7) */
767 args[3] = desc[7]; /* lbal */
768 args[4] = desc[9]; /* lbam */
769 args[5] = desc[11]; /* lbah */
770 args[6] = desc[12]; /* select */
771 if (copy_to_user(arg, args, sizeof(args)))
772 rc = -EFAULT;
773 }
774 }
775
776 if (cmd_result) {
b095518e 777 rc = -EIO;
af068bd1
DM		 778 goto error;
779 }
b095518e 780
af068bd1
DM		 781 error:
782 kfree(sensebuf);
b095518e
JG		 783 return rc;
784}
785
e3cf95dd
AC		 786static int ata_ioc32(struct ata_port *ap)
787{
788 if (ap->flags & ATA_FLAG_PIO_DMA)
789 return 1;
790 if (ap->pflags & ATA_PFLAG_PIO32)
791 return 1;
792 return 0;
793}
794
94be9a58
JG		 795int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
796 int cmd, void __user *arg)
1da177e4 797{
287e6611
AB		 798 unsigned long val;
799 int rc = -EINVAL;
e3cf95dd 800 unsigned long flags;
1da177e4 801
1da177e4 802 switch (cmd) {
287e6611 803 case HDIO_GET_32BIT:
e3cf95dd
AC		 804 spin_lock_irqsave(ap->lock, flags);
805 val = ata_ioc32(ap);
806 spin_unlock_irqrestore(ap->lock, flags);
287e6611 807 return put_user(val, (unsigned long __user *)arg);
1da177e4 808
287e6611 809 case HDIO_SET_32BIT:
1da177e4 810 val = (unsigned long) arg;
e3cf95dd
AC		 811 rc = 0;
812 spin_lock_irqsave(ap->lock, flags);
813 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
814 if (val)
815 ap->pflags |= ATA_PFLAG_PIO32;
816 else
817 ap->pflags &= ~ATA_PFLAG_PIO32;
818 } else {
819 if (val != ata_ioc32(ap))
820 rc = -EINVAL;
821 }
822 spin_unlock_irqrestore(ap->lock, flags);
823 return rc;
1da177e4 824
5924b74c 825 case HDIO_GET_IDENTITY:
94be9a58 826 return ata_get_identity(ap, scsidev, arg);
5924b74c 827
b095518e
JG		 828 case HDIO_DRIVE_CMD:
829 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
830 return -EACCES;
831 return ata_cmd_ioctl(scsidev, arg);
832
833 case HDIO_DRIVE_TASK:
834 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
835 return -EACCES;
836 return ata_task_ioctl(scsidev, arg);
837
1da177e4
LT		 838 default:
839 rc = -ENOTTY;
840 break;
841 }
842
1da177e4
LT		 843 return rc;
844}
94be9a58
JG		 845EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
846
847int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
848{
849 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
850 scsidev, cmd, arg);
851}
852EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 853
854/**
855 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 856 * @dev: ATA device to which the new command is attached
857 * @cmd: SCSI command that originated this ATA command
1da177e4
LT		 858 *
859 * Obtain a reference to an unused ata_queued_cmd structure,
860 * which is the basic libata structure representing a single
861 * ATA command sent to the hardware.
862 *
863 * If a command was available, fill in the SCSI-specific
864 * portions of the structure with information on the
865 * current command.
866 *
867 * LOCKING:
cca3974e 868 * spin_lock_irqsave(host lock)
1da177e4
LT		 869 *
870 * RETURNS:
871 * Command allocated, or %NULL if none available.
872 */
7102d230 873static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
b27dcfb0 874 struct scsi_cmnd *cmd)
1da177e4
LT		 875{
876 struct ata_queued_cmd *qc;
877
12cb5ce1 878 qc = ata_qc_new_init(dev, cmd->request->tag);
1da177e4
LT		 879 if (qc) {
880 qc->scsicmd = cmd;
b27dcfb0 881 qc->scsidone = cmd->scsi_done;
1da177e4 882
ff2aeb1e 883 qc->sg = scsi_sglist(cmd);
7120165c 884 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 885 } else {
886 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
b27dcfb0 887 cmd->scsi_done(cmd);
1da177e4
LT		 888 }
889
890 return qc;
891}
892
aacda375
TH		 893static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
894{
895 struct scsi_cmnd *scmd = qc->scsicmd;
896
897 qc->extrabytes = scmd->request->extra_len;
898 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
899}
900
b095518e
JG		 901/**
902 * ata_dump_status - user friendly display of error info
903 * @id: id of the port in question
904 * @tf: ptr to filled out taskfile
905 *
906 * Decode and dump the ATA error/status registers for the user so
907 * that they have some idea what really happened at the non
908 * make-believe layer.
909 *
910 * LOCKING:
911 * inherited from caller
912 */
7102d230 913static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 914{
915 u8 stat = tf->command, err = tf->feature;
916
917 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
918 if (stat & ATA_BUSY) {
919 printk("Busy }\n"); /* Data is not valid in this case */
920 } else {
1308d7f0
HR		 921 if (stat & ATA_DRDY) printk("DriveReady ");
922 if (stat & ATA_DF) printk("DeviceFault ");
923 if (stat & ATA_DSC) printk("SeekComplete ");
924 if (stat & ATA_DRQ) printk("DataRequest ");
925 if (stat & ATA_CORR) printk("CorrectedError ");
926 if (stat & ATA_SENSE) printk("Sense ");
927 if (stat & ATA_ERR) printk("Error ");
b095518e
JG		 928 printk("}\n");
929
930 if (err) {
931 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
1308d7f0
HR		 932 if (err & ATA_ABORTED) printk("DriveStatusError ");
933 if (err & ATA_ICRC) {
934 if (err & ATA_ABORTED)
935 printk("BadCRC ");
b095518e
JG		 936 else printk("Sector ");
937 }
1308d7f0
HR		 938 if (err & ATA_UNC) printk("UncorrectableError ");
939 if (err & ATA_IDNF) printk("SectorIdNotFound ");
940 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
941 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
b095518e
JG		 942 printk("}\n");
943 }
944 }
945}
946
1da177e4
LT		 947/**
948 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 949 * @id: ATA device number
1da177e4 950 * @drv_stat: value contained in ATA status register
b095518e
JG		 951 * @drv_err: value contained in ATA error register
952 * @sk: the sense key we'll fill out
953 * @asc: the additional sense code we'll fill out
954 * @ascq: the additional sense code qualifier we'll fill out
246619da 955 * @verbose: be verbose
1da177e4 956 *
b095518e
JG		 957 * Converts an ATA error into a SCSI error. Fill out pointers to
958 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
959 * format sense blocks.
1da177e4
LT		 960 *
961 * LOCKING:
cca3974e 962 * spin_lock_irqsave(host lock)
1da177e4 963 */
7102d230
AB		 964static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
965 u8 *asc, u8 *ascq, int verbose)
1da177e4 966{
b095518e 967 int i;
ffe75ef6 968
1da177e4 969 /* Based on the 3ware driver translation table */
98ac62de 970 static const unsigned char sense_table[][4] = {
1da177e4 971 /* BBD|ECC|ID|MAR */
8ae72044
HR		 972 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
973 // Device busy Aborted command
1da177e4 974 /* BBD|ECC|ID */
8ae72044
HR		 975 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
976 // Device busy Aborted command
1da177e4 977 /* ECC|MC|MARK */
8ae72044
HR		 978 {0x61, HARDWARE_ERROR, 0x00, 0x00},
979 // Device fault Hardware error
1da177e4 980 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
8ae72044
HR		 981 {0x84, ABORTED_COMMAND, 0x47, 0x00},
982 // Data CRC error SCSI parity error
1da177e4 983 /* MC|ID|ABRT|TRK0|MARK */
8ae72044
HR		 984 {0x37, NOT_READY, 0x04, 0x00},
985 // Unit offline Not ready
1da177e4 986 /* MCR|MARK */
8ae72044
HR		 987 {0x09, NOT_READY, 0x04, 0x00},
988 // Unrecovered disk error Not ready
1da177e4 989 /* Bad address mark */
8ae72044
HR		 990 {0x01, MEDIUM_ERROR, 0x13, 0x00},
991 // Address mark not found for data field
992 /* TRK0 - Track 0 not found */
993 {0x02, HARDWARE_ERROR, 0x00, 0x00},
994 // Hardware error
78062c50 995 /* Abort: 0x04 is not translated here, see below */
1da177e4 996 /* Media change request */
8ae72044
HR		 997 {0x08, NOT_READY, 0x04, 0x00},
998 // FIXME: faking offline
999 /* SRV/IDNF - ID not found */
1000 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
1001 // Logical address out of range
1002 /* MC - Media Changed */
1003 {0x20, UNIT_ATTENTION, 0x28, 0x00},
1004 // Not ready to ready change, medium may have changed
1005 /* ECC - Uncorrectable ECC error */
1006 {0x40, MEDIUM_ERROR, 0x11, 0x04},
1007 // Unrecovered read error
1da177e4 1008 /* BBD - block marked bad */
8ae72044
HR		 1009 {0x80, MEDIUM_ERROR, 0x11, 0x04},
1010 // Block marked bad Medium error, unrecovered read error
1da177e4
LT		 1011 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1012 };
98ac62de 1013 static const unsigned char stat_table[][4] = {
1da177e4 1014 /* Must be first because BUSY means no other bits valid */
8ae72044
HR		 1015 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1016 // Busy, fake parity for now
1017 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1018 // Device ready, unaligned write command
1019 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1020 // Device fault, internal target failure
1021 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1022 // Timed out in xfer, fake parity for now
1023 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1024 // Recovered ECC error Medium error, recovered
1da177e4
LT		 1025 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1026 };
1da177e4 1027
1da177e4
LT		 1028 /*
1029 * Is this an error we can process/parse
1030 */
b095518e
JG		 1031 if (drv_stat & ATA_BUSY) {
1032 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 1033 }
b095518e
JG		 1034
1035 if (drv_err) {
1036 /* Look for drv_err */
1037 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1038 /* Look for best matches first */
2e9edbf8 1039 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 1040 sense_table[i][0]) {
1041 *sk = sense_table[i][1];
1042 *asc = sense_table[i][2];
1043 *ascq = sense_table[i][3];
1044 goto translate_done;
1045 }
1046 }
1da177e4 1047 }
b095518e 1048
78062c50
GG		 1049 /*
1050 * Fall back to interpreting status bits. Note that if the drv_err
1051 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1052 * is not descriptive enough.
1053 */
b095518e
JG		 1054 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1055 if (stat_table[i][0] & drv_stat) {
1056 *sk = stat_table[i][1];
1057 *asc = stat_table[i][2];
1058 *ascq = stat_table[i][3];
1059 goto translate_done;
1da177e4 1060 }
b095518e 1061 }
b095518e 1062
78062c50
GG		 1063 /*
1064 * We need a sensible error return here, which is tricky, and one
1065 * that won't cause people to do things like return a disk wrongly.
1066 */
2d202024
AC		 1067 *sk = ABORTED_COMMAND;
1068 *asc = 0x00;
1069 *ascq = 0x00;
b095518e
JG		 1070
1071 translate_done:
246619da
TH		 1072 if (verbose)
1073 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
1074 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1075 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 1076 return;
1077}
1078
1079/*
750426aa 1080 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 1081 * @qc: Command that completed.
1082 *
1083 * This function is specific to the ATA descriptor format sense
1084 * block specified for the ATA pass through commands. Regardless
1085 * of whether the command errored or not, return a sense
1086 * block. Copy all controller registers into the sense
84a9a8cd
GG		 1087 * block. If there was no error, we get the request from an ATA
1088 * passthrough command, so we use the following sense data:
1089 * sk = RECOVERED ERROR
1090 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1091 *
b095518e
JG		 1092 *
1093 * LOCKING:
750426aa 1094 * None.
b095518e 1095 */
750426aa 1096static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 1097{
1098 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1099 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 1100 unsigned char *sb = cmd->sense_buffer;
1101 unsigned char *desc = sb + 8;
246619da 1102 int verbose = qc->ap->ops->error_handler == NULL;
b525e773 1103 u8 sense_key, asc, ascq;
b095518e
JG		 1104
1105 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1106
0e5dec47 1107 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1108
b095518e
JG		 1109 /*
1110 * Use ata_to_sense_error() to map status register bits
1111 * onto sense key, asc & ascq.
1112 */
058e55e1
TH		 1113 if (qc->err_mask ||
1114 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1115 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
b525e773 1116 &sense_key, &asc, &ascq, verbose);
06dbde5f 1117 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
84a9a8cd 1118 } else {
11093cb1
HR		 1119 /*
1120 * ATA PASS-THROUGH INFORMATION AVAILABLE
1121 * Always in descriptor format sense.
1122 */
1123 scsi_build_sense_buffer(1, cmd->sense_buffer,
1124 RECOVERED_ERROR, 0, 0x1D);
1da177e4
LT		 1125 }
1126
11093cb1
HR		 1127 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1128 u8 len;
1129
1130 /* descriptor format */
1131 len = sb[7];
1132 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1133 if (!desc) {
1134 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1135 return;
1136 sb[7] = len + 14;
1137 desc = sb + 8 + len;
1138 }
1139 desc[0] = 9;
1140 desc[1] = 12;
1141 /*
1142 * Copy registers into sense buffer.
1143 */
1144 desc[2] = 0x00;
1145 desc[3] = tf->feature; /* == error reg */
1146 desc[5] = tf->nsect;
1147 desc[7] = tf->lbal;
1148 desc[9] = tf->lbam;
1149 desc[11] = tf->lbah;
1150 desc[12] = tf->device;
1151 desc[13] = tf->command; /* == status reg */
b095518e 1152
11093cb1
HR		 1153 /*
1154 * Fill in Extend bit, and the high order bytes
1155 * if applicable.
1156 */
1157 if (tf->flags & ATA_TFLAG_LBA48) {
1158 desc[2] |= 0x01;
1159 desc[4] = tf->hob_nsect;
1160 desc[6] = tf->hob_lbal;
1161 desc[8] = tf->hob_lbam;
1162 desc[10] = tf->hob_lbah;
1163 }
1164 } else {
1165 /* Fixed sense format */
1166 desc[0] = tf->feature;
1167 desc[1] = tf->command; /* status */
1168 desc[2] = tf->device;
1169 desc[3] = tf->nsect;
e0029dcb 1170 desc[7] = 0;
11093cb1
HR		 1171 if (tf->flags & ATA_TFLAG_LBA48) {
1172 desc[8] |= 0x80;
1173 if (tf->hob_nsect)
1174 desc[8] |= 0x40;
1175 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1176 desc[8] |= 0x20;
1177 }
1178 desc[9] = tf->lbal;
1179 desc[10] = tf->lbam;
1180 desc[11] = tf->lbah;
1da177e4 1181 }
b095518e 1182}
1da177e4 1183
b095518e 1184/**
750426aa 1185 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1186 * @qc: Command that we are erroring out
1187 *
d25614ba 1188 * Generate sense block for a failed ATA command @qc. Descriptor
25985edc 1189 * format is used to accommodate LBA48 block address.
b095518e
JG		 1190 *
1191 * LOCKING:
750426aa 1192 * None.
b095518e 1193 */
750426aa 1194static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1195{
d25614ba 1196 struct ata_device *dev = qc->dev;
b095518e 1197 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1198 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1199 unsigned char *sb = cmd->sense_buffer;
246619da 1200 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1201 u64 block;
b525e773 1202 u8 sense_key, asc, ascq;
b095518e
JG		 1203
1204 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1205
0e5dec47 1206 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1207
59f68474
HR		 1208 if (ata_dev_disabled(dev)) {
1209 /* Device disabled after error recovery */
1210 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1211 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1212 return;
1213 }
d25614ba 1214 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1215 * onto sense key, asc & ascq.
1216 */
058e55e1
TH		 1217 if (qc->err_mask ||
1218 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1219 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
b525e773 1220 &sense_key, &asc, &ascq, verbose);
06dbde5f 1221 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
5e6acd1c
HR		 1222 } else {
1223 /* Could not decode error */
1224 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1225 tf->command, qc->err_mask);
06dbde5f 1226 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
5e6acd1c 1227 return;
1da177e4 1228 }
1da177e4 1229
d25614ba 1230 block = ata_tf_read_block(&qc->result_tf, dev);
cffd1ee9
HR		 1231 if (block == U64_MAX)
1232 return;
a7dac447 1233
cf8b49b0 1234 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1da177e4
LT		 1235}
1236
a6cce2a7
BK		 1237static void ata_scsi_sdev_config(struct scsi_device *sdev)
1238{
1239 sdev->use_10_for_rw = 1;
1240 sdev->use_10_for_ms = 1;
e185934f 1241 sdev->no_write_same = 1;
31cc23b3
TH		 1242
1243 /* Schedule policy is determined by ->qc_defer() callback and
1244 * it needs to see every deferred qc. Set dev_blocked to 1 to
1245 * prevent SCSI midlayer from automatically deferring
1246 * requests.
1247 */
1248 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1249}
1250
fa2fc7f4
JB		 1251/**
1252 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1253 * @rq: request to be checked
fa2fc7f4
JB		 1254 *
1255 * ATAPI commands which transfer variable length data to host
c9b5560a 1256 * might overflow due to application error or hardware bug. This
fa2fc7f4
JB		 1257 * function checks whether overflow should be drained and ignored
1258 * for @request.
1259 *
1260 * LOCKING:
1261 * None.
1262 *
1263 * RETURNS:
1264 * 1 if ; otherwise, 0.
1265 */
1266static int atapi_drain_needed(struct request *rq)
1267{
33659ebb 1268 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1269 return 0;
1270
a8ebb056 1271 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
fa2fc7f4
JB		 1272 return 0;
1273
1274 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1275}
1276
1277static int ata_scsi_dev_config(struct scsi_device *sdev,
1278 struct ata_device *dev)
a6cce2a7 1279{
900e599e 1280 struct request_queue *q = sdev->request_queue;
1281
45fabbb7
EO		 1282 if (!ata_id_has_unload(dev->id))
1283 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1284
914ed354 1285 /* configure max sectors */
900e599e 1286 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1287
fa2fc7f4 1288 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1289 void *buf;
1290
729a6a30
TH		 1291 sdev->sector_size = ATA_SECT_SIZE;
1292
1293 /* set DMA padding */
900e599e 1294 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1295
1296 /* configure draining */
1297 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1298 if (!buf) {
a9a79dfe 1299 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1300 return -ENOMEM;
1301 }
1302
1303 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1304 } else {
295124dc 1305 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1306 sdev->manage_start_stop = 1;
dde20207 1307 }
d8cf5389 1308
729a6a30
TH		 1309 /*
1310 * ata_pio_sectors() expects buffer for each sector to not cross
1311 * page boundary. Enforce it by requiring buffers to be sector
1312 * aligned, which works iff sector_size is not larger than
1313 * PAGE_SIZE. ATAPI devices also need the alignment as
1314 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1315 */
1316 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1317 ata_dev_warn(dev,
729a6a30
TH		 1318 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1319 sdev->sector_size);
1320
900e599e 1321 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1322
f26792d5
JG		 1323 if (dev->flags & ATA_DFLAG_AN)
1324 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1325
a6e6ce8e
TH		 1326 if (dev->flags & ATA_DFLAG_NCQ) {
1327 int depth;
1328
1329 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1330 depth = min(ATA_MAX_QUEUE - 1, depth);
db5ed4df 1331 scsi_change_queue_depth(sdev, depth);
a6e6ce8e 1332 }
fa2fc7f4 1333
900e599e 1334 blk_queue_flush_queueable(q, false);
1335
295124dc 1336 dev->sdev = sdev;
fa2fc7f4 1337 return 0;
a6cce2a7
BK		 1338}
1339
1da177e4
LT		 1340/**
1341 * ata_scsi_slave_config - Set SCSI device attributes
1342 * @sdev: SCSI device to examine
1343 *
1344 * This is called before we actually start reading
1345 * and writing to the device, to configure certain
1346 * SCSI mid-layer behaviors.
1347 *
1348 * LOCKING:
1349 * Defined by SCSI layer. We don't really care.
1350 */
1351
1352int ata_scsi_slave_config(struct scsi_device *sdev)
1353{
31534363
TH		 1354 struct ata_port *ap = ata_shost_to_port(sdev->host);
1355 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1356 int rc = 0;
31534363 1357
a6cce2a7 1358 ata_scsi_sdev_config(sdev);
1da177e4 1359
31534363 1360 if (dev)
fa2fc7f4 1361 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1362
fa2fc7f4 1363 return rc;
1da177e4
LT		 1364}
1365
83c47bcb
TH		 1366/**
1367 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1368 * @sdev: SCSI device to be destroyed
1369 *
1370 * @sdev is about to be destroyed for hot/warm unplugging. If
1371 * this unplugging was initiated by libata as indicated by NULL
1372 * dev->sdev, this function doesn't have to do anything.
1373 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1374 * Clear dev->sdev, schedule the device for ATA detach and invoke
1375 * EH.
1376 *
1377 * LOCKING:
1378 * Defined by SCSI layer. We don't really care.
1379 */
1380void ata_scsi_slave_destroy(struct scsi_device *sdev)
1381{
1382 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1383 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1384 unsigned long flags;
1385 struct ata_device *dev;
1386
1387 if (!ap->ops->error_handler)
1388 return;
1389
ba6a1308 1390 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1391 dev = __ata_scsi_find_dev(ap, sdev);
1392 if (dev && dev->sdev) {
1393 /* SCSI device already in CANCEL state, no need to offline it */
1394 dev->sdev = NULL;
1395 dev->flags |= ATA_DFLAG_DETACH;
1396 ata_port_schedule_eh(ap);
1397 }
ba6a1308 1398 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1399
1400 kfree(q->dma_drain_buffer);
1401 q->dma_drain_buffer = NULL;
1402 q->dma_drain_size = 0;
83c47bcb
TH		 1403}
1404
a6e6ce8e 1405/**
f6e67035 1406 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
6d2dd054
MPS		 1407 * @ap: ATA port to which the device change the queue depth
1408 * @sdev: SCSI device to configure queue depth for
1409 * @queue_depth: new queue depth
a6e6ce8e 1410 *
f6e67035
DW		 1411 * libsas and libata have different approaches for associating a sdev to
1412 * its ata_port.
a6e6ce8e 1413 *
a6e6ce8e 1414 */
f6e67035 1415int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
db5ed4df 1416 int queue_depth)
a6e6ce8e 1417{
a6e6ce8e 1418 struct ata_device *dev;
360f654e 1419 unsigned long flags;
a6e6ce8e 1420
c3c70c44 1421 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1422 return sdev->queue_depth;
1423
1424 dev = ata_scsi_find_dev(ap, sdev);
1425 if (!dev || !ata_dev_enabled(dev))
1426 return sdev->queue_depth;
1427
c3c70c44 1428 /* NCQ enabled? */
360f654e 1429 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1430 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1431 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1432 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1433 queue_depth = 1;
1434 }
360f654e
TH		 1435 spin_unlock_irqrestore(ap->lock, flags);
1436
c3c70c44
TH		 1437 /* limit and apply queue depth */
1438 queue_depth = min(queue_depth, sdev->host->can_queue);
1439 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1440 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1441
1442 if (sdev->queue_depth == queue_depth)
1443 return -EINVAL;
1444
db5ed4df 1445 return scsi_change_queue_depth(sdev, queue_depth);
a6e6ce8e
TH		 1446}
1447
f6e67035
DW		 1448/**
1449 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1450 * @sdev: SCSI device to configure queue depth for
1451 * @queue_depth: new queue depth
f6e67035
DW		 1452 *
1453 * This is libata standard hostt->change_queue_depth callback.
1454 * SCSI will call into this callback when user tries to set queue
1455 * depth via sysfs.
1456 *
1457 * LOCKING:
1458 * SCSI layer (we don't care)
1459 *
1460 * RETURNS:
1461 * Newly configured queue depth.
1462 */
db5ed4df 1463int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
f6e67035
DW		 1464{
1465 struct ata_port *ap = ata_shost_to_port(sdev->host);
1466
db5ed4df 1467 return __ata_change_queue_depth(ap, sdev, queue_depth);
f6e67035
DW		 1468}
1469
972dcafb
DG		 1470/**
1471 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1472 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1473 *
1474 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1475 * (to start). Perhaps these commands should be preceded by
1476 * CHECK POWER MODE to see what power mode the device is already in.
1477 * [See SAT revision 5 at www.t10.org]
1478 *
1479 * LOCKING:
cca3974e 1480 * spin_lock_irqsave(host lock)
972dcafb
DG		 1481 *
1482 * RETURNS:
1483 * Zero on success, non-zero on error.
1484 */
ad706991 1485static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1486{
542b1444 1487 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1488 struct ata_taskfile *tf = &qc->tf;
ad706991 1489 const u8 *cdb = scmd->cmnd;
bcfc867d 1490 u16 fp;
0df10b84 1491 u8 bp = 0xff;
972dcafb 1492
bcfc867d
HR		 1493 if (scmd->cmd_len < 5) {
1494 fp = 4;
2e5704f6 1495 goto invalid_fld;
bcfc867d 1496 }
2e5704f6 1497
972dcafb
DG		 1498 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1499 tf->protocol = ATA_PROT_NODATA;
542b1444 1500 if (cdb[1] & 0x1) {
972dcafb
DG		 1501 ; /* ignore IMMED bit, violates sat-r05 */
1502 }
bcfc867d
HR		 1503 if (cdb[4] & 0x2) {
1504 fp = 4;
0df10b84 1505 bp = 1;
ae006510 1506 goto invalid_fld; /* LOEJ bit set not supported */
bcfc867d
HR		 1507 }
1508 if (((cdb[4] >> 4) & 0xf) != 0) {
1509 fp = 4;
0df10b84 1510 bp = 3;
ae006510 1511 goto invalid_fld; /* power conditions not supported */
bcfc867d 1512 }
e31e8531 1513
542b1444 1514 if (cdb[4] & 0x1) {
972dcafb 1515 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1516
1517 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1518 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1519
1520 tf->lbah = 0x0;
1521 tf->lbam = 0x0;
1522 tf->lbal = 0x0;
1523 tf->device |= ATA_LBA;
1524 } else {
1525 /* CHS */
1526 tf->lbal = 0x1; /* sect */
1527 tf->lbam = 0x0; /* cyl low */
1528 tf->lbah = 0x0; /* cyl high */
1529 }
1530
972dcafb 1531 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1532 } else {
2a6e58d2
RW		 1533 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1534 * or S5) causing some drives to spin up and down again.
1535 */
1536 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1537 system_state == SYSTEM_POWER_OFF)
1538 goto skip;
1539
1540 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1541 system_entering_hibernation())
1542 goto skip;
1543
78981a7c
RH		 1544 /* Issue ATA STANDBY IMMEDIATE command */
1545 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1546 }
78981a7c 1547
972dcafb
DG		 1548 /*
1549 * Standby and Idle condition timers could be implemented but that
1550 * would require libata to implement the Power condition mode page
1551 * and allow the user to change it. Changing mode pages requires
1552 * MODE SELECT to be implemented.
1553 */
1554
1555 return 0;
ae006510 1556
2a6e58d2 1557 invalid_fld:
0df10b84 1558 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
ae006510 1559 return 1;
2a6e58d2
RW		 1560 skip:
1561 scmd->result = SAM_STAT_GOOD;
1562 return 1;
972dcafb
DG		 1563}
1564
1565
1da177e4
LT		 1566/**
1567 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1568 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1569 *
1570 * Sets up an ATA taskfile to issue FLUSH CACHE or
1571 * FLUSH CACHE EXT.
1572 *
1573 * LOCKING:
cca3974e 1574 * spin_lock_irqsave(host lock)
1da177e4
LT		 1575 *
1576 * RETURNS:
1577 * Zero on success, non-zero on error.
1578 */
ad706991 1579static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1580{
1581 struct ata_taskfile *tf = &qc->tf;
1582
1583 tf->flags |= ATA_TFLAG_DEVICE;
1584 tf->protocol = ATA_PROT_NODATA;
1585
6fc49adb 1586 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1587 tf->command = ATA_CMD_FLUSH_EXT;
1588 else
1589 tf->command = ATA_CMD_FLUSH;
1590
b666da35
TH		 1591 /* flush is critical for IO integrity, consider it an IO command */
1592 qc->flags |= ATA_QCFLAG_IO;
1593
1da177e4
LT		 1594 return 0;
1595}
1596
3aef5231
AL		 1597/**
1598 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1599 * @cdb: SCSI command to translate
3aef5231
AL		 1600 *
1601 * Calculate LBA and transfer length for 6-byte commands.
1602 *
1603 * RETURNS:
1604 * @plba: the LBA
1605 * @plen: the transfer length
1606 */
542b1444 1607static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1608{
1609 u64 lba = 0;
6c7b7d2b 1610 u32 len;
3aef5231
AL		 1611
1612 VPRINTK("six-byte command\n");
1613
6c7b7d2b 1614 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1615 lba |= ((u64)cdb[2]) << 8;
1616 lba |= ((u64)cdb[3]);
3aef5231 1617
6c7b7d2b 1618 len = cdb[4];
3aef5231
AL		 1619
1620 *plba = lba;
1621 *plen = len;
1622}
1623
1624/**
1625 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1626 * @cdb: SCSI command to translate
3aef5231
AL		 1627 *
1628 * Calculate LBA and transfer length for 10-byte commands.
1629 *
1630 * RETURNS:
1631 * @plba: the LBA
1632 * @plen: the transfer length
1633 */
542b1444 1634static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1635{
1636 u64 lba = 0;
1637 u32 len = 0;
1638
1639 VPRINTK("ten-byte command\n");
1640
542b1444
TH		 1641 lba |= ((u64)cdb[2]) << 24;
1642 lba |= ((u64)cdb[3]) << 16;
1643 lba |= ((u64)cdb[4]) << 8;
1644 lba |= ((u64)cdb[5]);
3aef5231 1645
542b1444
TH		 1646 len |= ((u32)cdb[7]) << 8;
1647 len |= ((u32)cdb[8]);
3aef5231
AL		 1648
1649 *plba = lba;
1650 *plen = len;
1651}
1652
1653/**
1654 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1655 * @cdb: SCSI command to translate
3aef5231
AL		 1656 *
1657 * Calculate LBA and transfer length for 16-byte commands.
1658 *
1659 * RETURNS:
1660 * @plba: the LBA
1661 * @plen: the transfer length
1662 */
542b1444 1663static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1664{
1665 u64 lba = 0;
1666 u32 len = 0;
1667
1668 VPRINTK("sixteen-byte command\n");
1669
542b1444
TH		 1670 lba |= ((u64)cdb[2]) << 56;
1671 lba |= ((u64)cdb[3]) << 48;
1672 lba |= ((u64)cdb[4]) << 40;
1673 lba |= ((u64)cdb[5]) << 32;
1674 lba |= ((u64)cdb[6]) << 24;
1675 lba |= ((u64)cdb[7]) << 16;
1676 lba |= ((u64)cdb[8]) << 8;
1677 lba |= ((u64)cdb[9]);
3aef5231 1678
542b1444
TH		 1679 len |= ((u32)cdb[10]) << 24;
1680 len |= ((u32)cdb[11]) << 16;
1681 len |= ((u32)cdb[12]) << 8;
1682 len |= ((u32)cdb[13]);
3aef5231
AL		 1683
1684 *plba = lba;
1685 *plen = len;
1686}
1687
1da177e4
LT		 1688/**
1689 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1690 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1691 *
1692 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1693 *
1694 * LOCKING:
cca3974e 1695 * spin_lock_irqsave(host lock)
1da177e4
LT		 1696 *
1697 * RETURNS:
1698 * Zero on success, non-zero on error.
1699 */
ad706991 1700static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1701{
542b1444 1702 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1703 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1704 struct ata_device *dev = qc->dev;
1da177e4 1705 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1706 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1707 u64 block;
1708 u32 n_block;
bcfc867d 1709 u16 fp;
1da177e4
LT		 1710
1711 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1712 tf->protocol = ATA_PROT_NODATA;
1da177e4 1713
2e5704f6 1714 if (cdb[0] == VERIFY) {
bcfc867d
HR		 1715 if (scmd->cmd_len < 10) {
1716 fp = 9;
2e5704f6 1717 goto invalid_fld;
bcfc867d 1718 }
542b1444 1719 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6 1720 } else if (cdb[0] == VERIFY_16) {
bcfc867d
HR		 1721 if (scmd->cmd_len < 16) {
1722 fp = 15;
2e5704f6 1723 goto invalid_fld;
bcfc867d 1724 }
542b1444 1725 scsi_16_lba_len(cdb, &block, &n_block);
bcfc867d
HR		 1726 } else {
1727 fp = 0;
ae006510 1728 goto invalid_fld;
bcfc867d 1729 }
1da177e4 1730
8bf62ece 1731 if (!n_block)
ae006510 1732 goto nothing_to_do;
8bf62ece 1733 if (block >= dev_sectors)
ae006510 1734 goto out_of_range;
8bf62ece 1735 if ((block + n_block) > dev_sectors)
ae006510 1736 goto out_of_range;
1da177e4 1737
07506697
AL		 1738 if (dev->flags & ATA_DFLAG_LBA) {
1739 tf->flags |= ATA_TFLAG_LBA;
1740
c6a33e24
AL		 1741 if (lba_28_ok(block, n_block)) {
1742 /* use LBA28 */
1743 tf->command = ATA_CMD_VERIFY;
1744 tf->device |= (block >> 24) & 0xf;
1745 } else if (lba_48_ok(block, n_block)) {
1746 if (!(dev->flags & ATA_DFLAG_LBA48))
1747 goto out_of_range;
07506697
AL		 1748
1749 /* use LBA48 */
1750 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1751 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1752
8bf62ece 1753 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1754
8bf62ece
AL		 1755 tf->hob_lbah = (block >> 40) & 0xff;
1756 tf->hob_lbam = (block >> 32) & 0xff;
1757 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1758 } else
1759 /* request too large even for LBA48 */
1760 goto out_of_range;
8bf62ece
AL		 1761
1762 tf->nsect = n_block & 0xff;
1da177e4 1763
8bf62ece
AL		 1764 tf->lbah = (block >> 16) & 0xff;
1765 tf->lbam = (block >> 8) & 0xff;
1766 tf->lbal = block & 0xff;
1da177e4 1767
8bf62ece
AL		 1768 tf->device |= ATA_LBA;
1769 } else {
1770 /* CHS */
1771 u32 sect, head, cyl, track;
1772
c6a33e24
AL		 1773 if (!lba_28_ok(block, n_block))
1774 goto out_of_range;
07506697 1775
8bf62ece
AL		 1776 /* Convert LBA to CHS */
1777 track = (u32)block / dev->sectors;
1778 cyl = track / dev->heads;
1779 head = track % dev->heads;
1780 sect = (u32)block % dev->sectors + 1;
1781
c187c4b5
AL		 1782 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1783 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1784
1785 /* Check whether the converted CHS can fit.
1786 Cylinder: 0-65535
8bf62ece
AL		 1787 Head: 0-15
1788 Sector: 1-255*/
2e9edbf8 1789 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1790 goto out_of_range;
2e9edbf8 1791
8bf62ece
AL		 1792 tf->command = ATA_CMD_VERIFY;
1793 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1794 tf->lbal = sect;
1795 tf->lbam = cyl;
1796 tf->lbah = cyl >> 8;
1797 tf->device |= head;
1798 }
1da177e4
LT		 1799
1800 return 0;
ae006510
DG		 1801
1802invalid_fld:
0df10b84 1803 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
ae006510
DG		 1804 return 1;
1805
1806out_of_range:
06dbde5f 1807 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1808 /* "Logical Block Address out of range" */
1809 return 1;
1810
1811nothing_to_do:
542b1444 1812 scmd->result = SAM_STAT_GOOD;
ae006510 1813 return 1;
1da177e4
LT		 1814}
1815
1816/**
1817 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1818 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1819 *
1820 * Converts any of six SCSI read/write commands into the
1821 * ATA counterpart, including starting sector (LBA),
1822 * sector count, and taking into account the device's LBA48
1823 * support.
1824 *
1825 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1826 * %WRITE_16 are currently supported.
1827 *
1828 * LOCKING:
cca3974e 1829 * spin_lock_irqsave(host lock)
1da177e4
LT		 1830 *
1831 * RETURNS:
1832 * Zero on success, non-zero on error.
1833 */
ad706991 1834static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1835{
542b1444 1836 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1837 const u8 *cdb = scmd->cmnd;
8e061784
AM		 1838 struct request *rq = scmd->request;
1839 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
bd056d7e 1840 unsigned int tf_flags = 0;
3aef5231
AL		 1841 u64 block;
1842 u32 n_block;
bd056d7e 1843 int rc;
bcfc867d 1844 u16 fp = 0;
1da177e4 1845
542b1444 1846 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1847 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1848
9a3dccc4 1849 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1850 switch (cdb[0]) {
3aef5231
AL		 1851 case READ_10:
1852 case WRITE_10:
bcfc867d
HR		 1853 if (unlikely(scmd->cmd_len < 10)) {
1854 fp = 9;
2e5704f6 1855 goto invalid_fld;
bcfc867d 1856 }
542b1444 1857 scsi_10_lba_len(cdb, &block, &n_block);
3e451a49 1858 if (cdb[1] & (1 << 3))
bd056d7e 1859 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1860 break;
1861 case READ_6:
1862 case WRITE_6:
bcfc867d
HR		 1863 if (unlikely(scmd->cmd_len < 6)) {
1864 fp = 5;
2e5704f6 1865 goto invalid_fld;
bcfc867d 1866 }
542b1444 1867 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1868
1869 /* for 6-byte r/w commands, transfer length 0
1870 * means 256 blocks of data, not 0 block.
1871 */
76b2bf9b
JG		 1872 if (!n_block)
1873 n_block = 256;
3aef5231
AL		 1874 break;
1875 case READ_16:
1876 case WRITE_16:
bcfc867d
HR		 1877 if (unlikely(scmd->cmd_len < 16)) {
1878 fp = 15;
2e5704f6 1879 goto invalid_fld;
bcfc867d 1880 }
542b1444 1881 scsi_16_lba_len(cdb, &block, &n_block);
3e451a49 1882 if (cdb[1] & (1 << 3))
bd056d7e 1883 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1884 break;
1885 default:
8bf62ece 1886 DPRINTK("no-byte command\n");
bcfc867d 1887 fp = 0;
ae006510 1888 goto invalid_fld;
1da177e4
LT		 1889 }
1890
8bf62ece
AL		 1891 /* Check and compose ATA command */
1892 if (!n_block)
c187c4b5
AL		 1893 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1894 * length 0 means transfer 0 block of data.
1895 * However, for ATA R/W commands, sector count 0 means
1896 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1897 *
1898 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1899 */
ae006510 1900 goto nothing_to_do;
1da177e4 1901
bd056d7e 1902 qc->flags |= ATA_QCFLAG_IO;
295124dc 1903 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1904
bd056d7e 1905 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
8e061784
AM		 1906 qc->tag, class);
1907
bd056d7e
TH		 1908 if (likely(rc == 0))
1909 return 0;
ae006510 1910
bd056d7e
TH		 1911 if (rc == -ERANGE)
1912 goto out_of_range;
1913 /* treat all other errors as -EINVAL, fall through */
ae006510 1914invalid_fld:
0df10b84 1915 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
ae006510
DG		 1916 return 1;
1917
1918out_of_range:
06dbde5f 1919 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1920 /* "Logical Block Address out of range" */
1921 return 1;
1922
1923nothing_to_do:
542b1444 1924 scmd->result = SAM_STAT_GOOD;
ae006510 1925 return 1;
1da177e4
LT		 1926}
1927
2aa8f5d6
CH		 1928static void ata_qc_done(struct ata_queued_cmd *qc)
1929{
1930 struct scsi_cmnd *cmd = qc->scsicmd;
1931 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1932
1933 ata_qc_free(qc);
1934 done(cmd);
1935}
1936
77853bf2 1937static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1938{
c31f571d 1939 struct ata_port *ap = qc->ap;
1da177e4 1940 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1941 u8 *cdb = cmd->cmnd;
2dcb407e 1942 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1943
1944 /* For ATA pass thru (SAT) commands, generate a sense block if
1945 * user mandated it or if there's an error. Note that if we
84a9a8cd
GG		 1946 * generate because the user forced us to [CK_COND =1], a check
1947 * condition is generated and the ATA register values are returned
b095518e 1948 * whether the command completed successfully or not. If there
84a9a8cd
GG		 1949 * was no error, we use the following sense data:
1950 * sk = RECOVERED ERROR
1951 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
b095518e 1952 */
a7dac447 1953 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
25c7ce7f 1954 ((cdb[2] & 0x20) || need_sense))
750426aa 1955 ata_gen_passthru_sense(qc);
5b01e4b9
HR		 1956 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1957 cmd->result = SAM_STAT_CHECK_CONDITION;
25c7ce7f
CH		 1958 else if (need_sense)
1959 ata_gen_ata_sense(qc);
1960 else
1961 cmd->result = SAM_STAT_GOOD;
1da177e4 1962
c31f571d 1963 if (need_sense && !ap->ops->error_handler)
44877b4e 1964 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4 1965
2aa8f5d6 1966 ata_qc_done(qc);
1da177e4
LT		 1967}
1968
1969/**
1970 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1971 * @dev: ATA device to which the command is addressed
1972 * @cmd: SCSI command to execute
1da177e4
LT		 1973 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1974 *
1975 * Our ->queuecommand() function has decided that the SCSI
1976 * command issued can be directly translated into an ATA
1977 * command, rather than handled internally.
1978 *
1979 * This function sets up an ata_queued_cmd structure for the
1980 * SCSI command, and sends that ata_queued_cmd to the hardware.
1981 *
ae006510
DG		 1982 * The xlat_func argument (actor) returns 0 if ready to execute
1983 * ATA command, else 1 to finish translation. If 1 is returned
1984 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1985 * to be set reflecting an error condition or clean (early)
1986 * termination.
1987 *
1da177e4 1988 * LOCKING:
cca3974e 1989 * spin_lock_irqsave(host lock)
2115ea94
TH		 1990 *
1991 * RETURNS:
1992 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1993 * needs to be deferred.
1da177e4 1994 */
2115ea94 1995static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1996 ata_xlat_func_t xlat_func)
1da177e4 1997{
31cc23b3 1998 struct ata_port *ap = dev->link->ap;
1da177e4 1999 struct ata_queued_cmd *qc;
31cc23b3 2000 int rc;
1da177e4
LT		 2001
2002 VPRINTK("ENTER\n");
2003
b27dcfb0 2004 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 2005 if (!qc)
ae006510 2006 goto err_mem;
1da177e4
LT		 2007
2008 /* data is present; dma-map it */
be7db055 2009 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2010 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 2011 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 2012 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 2013 goto err_did;
1da177e4
LT		 2014 }
2015
7120165c 2016 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 2017
2018 qc->dma_dir = cmd->sc_data_direction;
2019 }
2020
2021 qc->complete_fn = ata_scsi_qc_complete;
2022
ad706991 2023 if (xlat_func(qc))
ae006510 2024 goto early_finish;
1da177e4 2025
31cc23b3
TH		 2026 if (ap->ops->qc_defer) {
2027 if ((rc = ap->ops->qc_defer(qc)))
2028 goto defer;
2029 }
2030
1da177e4 2031 /* select device, send command to hardware */
8e0e694a 2032 ata_qc_issue(qc);
1da177e4
LT		 2033
2034 VPRINTK("EXIT\n");
2115ea94 2035 return 0;
1da177e4 2036
ae006510 2037early_finish:
2dcb407e 2038 ata_qc_free(qc);
b27dcfb0 2039 cmd->scsi_done(cmd);
ae006510 2040 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 2041 return 0;
ae006510
DG		 2042
2043err_did:
1da177e4 2044 ata_qc_free(qc);
ae006510 2045 cmd->result = (DID_ERROR << 16);
b27dcfb0 2046 cmd->scsi_done(cmd);
253b92ec 2047err_mem:
ae006510 2048 DPRINTK("EXIT - internal\n");
2115ea94 2049 return 0;
3dc1d881
TH		 2050
2051defer:
31cc23b3 2052 ata_qc_free(qc);
3dc1d881 2053 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 2054 if (rc == ATA_DEFER_LINK)
2055 return SCSI_MLQUEUE_DEVICE_BUSY;
2056 else
2057 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 2058}
2059
f0a37d12
CH		 2060struct ata_scsi_args {
2061 struct ata_device *dev;
2062 u16 *id;
2063 struct scsi_cmnd *cmd;
f0a37d12
CH		 2064};
2065
1da177e4
LT		 2066/**
2067 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 2068 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 2069 * @flags: unsigned long variable to store irq enable status
2070 * @copy_in: copy in from user buffer
1da177e4 2071 *
87340e98 2072 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 2073 *
2074 * LOCKING:
87340e98 2075 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 2076 *
2077 * RETURNS:
87340e98 2078 * Pointer to response buffer.
1da177e4 2079 */
87340e98
TH		 2080static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2081 unsigned long *flags)
1da177e4 2082{
87340e98 2083 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 2084
87340e98
TH		 2085 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2086 if (copy_in)
2087 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2088 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2089 return ata_scsi_rbuf;
1da177e4
LT		 2090}
2091
2092/**
2093 * ata_scsi_rbuf_put - Unmap response buffer.
2094 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 2095 * @copy_out: copy out result
2096 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 2097 *
87340e98
TH		 2098 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2099 * @copy_back is true.
1da177e4
LT		 2100 *
2101 * LOCKING:
87340e98 2102 * Unlocks ata_scsi_rbuf_lock.
1da177e4 2103 */
87340e98
TH		 2104static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2105 unsigned long *flags)
1da177e4 2106{
87340e98
TH		 2107 if (copy_out)
2108 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2109 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2110 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 2111}
2112
2113/**
2114 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2115 * @args: device IDENTIFY data / SCSI command of interest.
2116 * @actor: Callback hook for desired SCSI command simulator
2117 *
2118 * Takes care of the hard work of simulating a SCSI command...
2119 * Mapping the response buffer, calling the command's handler,
2120 * and handling the handler's return value. This return value
2121 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 2122 * completed successfully (0), or not (in which case cmd->result
2123 * and sense buffer are assumed to be set).
1da177e4
LT		 2124 *
2125 * LOCKING:
cca3974e 2126 * spin_lock_irqsave(host lock)
1da177e4 2127 */
f0761be3 2128static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 2129 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 2130{
2131 u8 *rbuf;
87340e98 2132 unsigned int rc;
1da177e4 2133 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 2134 unsigned long flags;
2135
87340e98
TH		 2136 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2137 rc = actor(args, rbuf);
2138 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 2139
ae006510 2140 if (rc == 0)
1da177e4 2141 cmd->result = SAM_STAT_GOOD;
506db360 2142 cmd->scsi_done(cmd);
1da177e4
LT		 2143}
2144
2145/**
2146 * ata_scsiop_inq_std - Simulate INQUIRY command
2147 * @args: device IDENTIFY data / SCSI command of interest.
2148 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2149 *
2150 * Returns standard device identification data associated
b142eb65 2151 * with non-VPD INQUIRY command output.
1da177e4
LT		 2152 *
2153 * LOCKING:
cca3974e 2154 * spin_lock_irqsave(host lock)
1da177e4 2155 */
87340e98 2156static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2157{
87340e98 2158 const u8 versions[] = {
f9ca5ab8 2159 0x00,
87340e98
TH		 2160 0x60, /* SAM-3 (no version claimed) */
2161
2162 0x03,
2163 0x20, /* SBC-2 (no version claimed) */
2164
29a37ea4
TY		 2165 0x03,
2166 0x00 /* SPC-3 (no version claimed) */
87340e98 2167 };
f9ca5ab8
HR		 2168 const u8 versions_zbc[] = {
2169 0x00,
2170 0xA0, /* SAM-5 (no version claimed) */
2171
856c4663
HR		 2172 0x06,
2173 0x00, /* SBC-4 (no version claimed) */
f9ca5ab8 2174
856c4663
HR		 2175 0x05,
2176 0xC0, /* SPC-5 (no version claimed) */
f9ca5ab8
HR		 2177
2178 0x60,
856c4663 2179 0x24, /* ZBC r05 */
f9ca5ab8
HR		 2180 };
2181
1da177e4
LT		 2182 u8 hdr[] = {
2183 TYPE_DISK,
2184 0,
2185 0x5, /* claim SPC-3 version compatibility */
2186 2,
415ffdde
TY		 2187 95 - 4,
2188 0,
2189 0,
2190 2
1da177e4
LT		 2191 };
2192
87340e98
TH		 2193 VPRINTK("ENTER\n");
2194
8a3e33cf
ML		 2195 /* set scsi removable (RMB) bit per ata bit, or if the
2196 * AHCI port says it's external (Hotplug-capable, eSATA).
2197 */
2198 if (ata_id_removable(args->id) ||
2199 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1da177e4
LT		 2200 hdr[1] |= (1 << 7);
2201
56b8cbab 2202 if (args->dev->class == ATA_DEV_ZAC) {
f9ca5ab8 2203 hdr[0] = TYPE_ZBC;
56b8cbab
TY		 2204 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2205 }
f9ca5ab8 2206
1da177e4 2207 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 2208 memcpy(&rbuf[8], "ATA ", 8);
2209 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
c49a6bf5
KB		 2210
2211 /* From SAT, use last 2 words from fw rev unless they are spaces */
2212 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2213 if (strncmp(&rbuf[32], " ", 4) == 0)
2214 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 2215
87340e98
TH		 2216 if (rbuf[32] == 0 || rbuf[32] == ' ')
2217 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 2218
856c4663 2219 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
f9ca5ab8
HR		 2220 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2221 else
2222 memcpy(rbuf + 58, versions, sizeof(versions));
1da177e4
LT		 2223
2224 return 0;
2225}
2226
2227/**
b142eb65 2228 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 2229 * @args: device IDENTIFY data / SCSI command of interest.
2230 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2231 *
b142eb65 2232 * Returns list of inquiry VPD pages available.
1da177e4
LT		 2233 *
2234 * LOCKING:
cca3974e 2235 * spin_lock_irqsave(host lock)
1da177e4 2236 */
87340e98 2237static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2238{
6d1003ae 2239 int num_pages;
1da177e4
LT		 2240 const u8 pages[] = {
2241 0x00, /* page 0x00, this page */
2242 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 2243 0x83, /* page 0x83, device ident page */
2244 0x89, /* page 0x89, ata info page */
18f0f978 2245 0xb0, /* page 0xb0, block limits page */
1e9dbc92 2246 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 2247 0xb2, /* page 0xb2, thin provisioning page */
6d1003ae 2248 0xb6, /* page 0xb6, zoned block device characteristics */
1da177e4 2249 };
1da177e4 2250
6d1003ae
HR		 2251 num_pages = sizeof(pages);
2252 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2253 num_pages--;
2254 rbuf[3] = num_pages; /* number of supported VPD pages */
2255 memcpy(rbuf + 4, pages, num_pages);
1da177e4
LT		 2256 return 0;
2257}
2258
2259/**
b142eb65 2260 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2261 * @args: device IDENTIFY data / SCSI command of interest.
2262 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2263 *
2264 * Returns ATA device serial number.
2265 *
2266 * LOCKING:
cca3974e 2267 * spin_lock_irqsave(host lock)
1da177e4 2268 */
87340e98 2269static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2270{
2271 const u8 hdr[] = {
2272 0,
2273 0x80, /* this page code */
2274 0,
a0cf733b 2275 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2276 };
1da177e4 2277
87340e98
TH		 2278 memcpy(rbuf, hdr, sizeof(hdr));
2279 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2280 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2281 return 0;
2282}
2283
1da177e4 2284/**
b142eb65 2285 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2286 * @args: device IDENTIFY data / SCSI command of interest.
2287 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2288 *
b142eb65
JG		 2289 * Yields two logical unit device identification designators:
2290 * - vendor specific ASCII containing the ATA serial number
2291 * - SAT defined "t10 vendor id based" containing ASCII vendor
2292 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2293 *
2294 * LOCKING:
cca3974e 2295 * spin_lock_irqsave(host lock)
1da177e4 2296 */
87340e98 2297static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2298{
b142eb65 2299 const int sat_model_serial_desc_len = 68;
87340e98 2300 int num;
1da177e4 2301
b142eb65
JG		 2302 rbuf[1] = 0x83; /* this page code */
2303 num = 4;
2304
87340e98
TH		 2305 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2306 rbuf[num + 0] = 2;
2307 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2308 num += 4;
2309 ata_id_string(args->id, (unsigned char *) rbuf + num,
2310 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2311 num += ATA_ID_SERNO_LEN;
2312
2313 /* SAT defined lu model and serial numbers descriptor */
2314 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2315 rbuf[num + 0] = 2;
2316 rbuf[num + 1] = 1;
2317 rbuf[num + 3] = sat_model_serial_desc_len;
2318 num += 4;
2319 memcpy(rbuf + num, "ATA ", 8);
2320 num += 8;
2321 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2322 ATA_ID_PROD_LEN);
2323 num += ATA_ID_PROD_LEN;
2324 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2325 ATA_ID_SERNO_LEN);
2326 num += ATA_ID_SERNO_LEN;
2327
6b3b9d73
HR		 2328 if (ata_id_has_wwn(args->id)) {
2329 /* SAT defined lu world wide name */
2330 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2331 rbuf[num + 0] = 1;
2332 rbuf[num + 1] = 3;
2333 rbuf[num + 3] = ATA_ID_WWN_LEN;
2334 num += 4;
2335 ata_id_string(args->id, (unsigned char *) rbuf + num,
2336 ATA_ID_WWN, ATA_ID_WWN_LEN);
2337 num += ATA_ID_WWN_LEN;
2338 }
b142eb65 2339 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2340 return 0;
2341}
2342
ad355b46
JG		 2343/**
2344 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2345 * @args: device IDENTIFY data / SCSI command of interest.
2346 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2347 *
2348 * Yields SAT-specified ATA VPD page.
2349 *
2350 * LOCKING:
2351 * spin_lock_irqsave(host lock)
2352 */
87340e98 2353static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2354{
ad355b46 2355 struct ata_taskfile tf;
ad355b46 2356
ad355b46
JG		 2357 memset(&tf, 0, sizeof(tf));
2358
87340e98
TH		 2359 rbuf[1] = 0x89; /* our page code */
2360 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2361 rbuf[3] = (0x238 & 0xff);
ad355b46 2362
87340e98
TH		 2363 memcpy(&rbuf[8], "linux ", 8);
2364 memcpy(&rbuf[16], "libata ", 16);
2365 memcpy(&rbuf[32], DRV_VERSION, 4);
ad355b46
JG		 2366
2367 /* we don't store the ATA device signature, so we fake it */
2368
2369 tf.command = ATA_DRDY; /* really, this is Status reg */
2370 tf.lbal = 0x1;
2371 tf.nsect = 0x1;
2372
87340e98
TH		 2373 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2374 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2375
87340e98 2376 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2377
87340e98 2378 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2379 return 0;
2380}
2381
18f0f978
CH		 2382static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2383{
295124dc 2384 u16 min_io_sectors;
18f0f978
CH		 2385
2386 rbuf[1] = 0xb0;
2387 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2388
2389 /*
2390 * Optimal transfer length granularity.
2391 *
2392 * This is always one physical block, but for disks with a smaller
2393 * logical than physical sector size we need to figure out what the
2394 * latter is.
2395 */
295124dc 2396 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2397 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2398
2399 /*
2400 * Optimal unmap granularity.
2401 *
2402 * The ATA spec doesn't even know about a granularity or alignment
2403 * for the TRIM command. We can leave away most of the unmap related
2404 * VPD page entries, but we have specifify a granularity to signal
2405 * that we support some form of unmap - in thise case via WRITE SAME
2406 * with the unmap bit set.
2407 */
e78db4df 2408 if (ata_id_has_trim(args->id)) {
2983860c 2409 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
18f0f978 2410 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2411 }
18f0f978
CH		 2412
2413 return 0;
2414}
2415
1e9dbc92
MW		 2416static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2417{
4bca3286
MP		 2418 int form_factor = ata_id_form_factor(args->id);
2419 int media_rotation_rate = ata_id_rotation_rate(args->id);
856c4663 2420 u8 zoned = ata_id_zoned_cap(args->id);
4bca3286 2421
1e9dbc92
MW		 2422 rbuf[1] = 0xb1;
2423 rbuf[3] = 0x3c;
4bca3286
MP		 2424 rbuf[4] = media_rotation_rate >> 8;
2425 rbuf[5] = media_rotation_rate;
2426 rbuf[7] = form_factor;
856c4663
HR		 2427 if (zoned)
2428 rbuf[8] = (zoned << 4);
1e9dbc92
MW		 2429
2430 return 0;
2431}
2432
02e0a604
MP		 2433static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2434{
2435 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2436 rbuf[1] = 0xb2;
2437 rbuf[3] = 0x4;
2438 rbuf[5] = 1 << 6; /* TPWS */
2439
2440 return 0;
2441}
2442
6d1003ae
HR		 2443static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2444{
2445 /*
2446 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2447 */
2448 rbuf[1] = 0xb6;
2449 rbuf[3] = 0x3C;
2450
2451 /*
2452 * URSWRZ bit is only meaningful for host-managed ZAC drives
2453 */
2454 if (args->dev->zac_zoned_cap & 1)
2455 rbuf[4] |= 1;
2456 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2457 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2458 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2459
2460 return 0;
2461}
2462
1da177e4 2463/**
0cba632b 2464 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2465 * @args: device IDENTIFY data / SCSI command of interest.
2466 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2467 *
2468 * No operation. Simply returns success to caller, to indicate
2469 * that the caller should successfully complete this SCSI command.
2470 *
2471 * LOCKING:
cca3974e 2472 * spin_lock_irqsave(host lock)
1da177e4 2473 */
87340e98 2474static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2475{
2476 VPRINTK("ENTER\n");
2477 return 0;
2478}
2479
6ca8e794
PB		 2480/**
2481 * modecpy - Prepare response for MODE SENSE
2482 * @dest: output buffer
2483 * @src: data being copied
2484 * @n: length of mode page
2485 * @changeable: whether changeable parameters are requested
2486 *
2487 * Generate a generic MODE SENSE page for either current or changeable
2488 * parameters.
2489 *
2490 * LOCKING:
2491 * None.
2492 */
2493static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2494{
2495 if (changeable) {
2496 memcpy(dest, src, 2);
2497 memset(dest + 2, 0, n - 2);
2498 } else {
2499 memcpy(dest, src, n);
2500 }
2501}
2502
1da177e4
LT		 2503/**
2504 * ata_msense_caching - Simulate MODE SENSE caching info page
2505 * @id: device IDENTIFY data
87340e98 2506 * @buf: output buffer
6ca8e794 2507 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2508 *
2509 * Generate a caching info page, which conditionally indicates
2510 * write caching to the SCSI layer, depending on device
2511 * capabilities.
2512 *
2513 * LOCKING:
2514 * None.
2515 */
6ca8e794 2516static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
1da177e4 2517{
6ca8e794 2518 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
737bee93
TY		 2519 if (changeable) {
2520 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2521 } else {
2522 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2523 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2524 }
87340e98 2525 return sizeof(def_cache_mpage);
1da177e4
LT		 2526}
2527
2528/**
f086b748 2529 * ata_msense_control - Simulate MODE SENSE control mode page
06dbde5f 2530 * @dev: ATA device of interest
87340e98 2531 * @buf: output buffer
6ca8e794 2532 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2533 *
2534 * Generate a generic MODE SENSE control mode page.
2535 *
2536 * LOCKING:
2537 * None.
2538 */
f086b748 2539static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
06dbde5f 2540 bool changeable)
1da177e4 2541{
6ca8e794 2542 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
737bee93
TY		 2543 if (changeable) {
2544 buf[2] |= (1 << 2); /* ata_mselect_control() */
2545 } else {
2546 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2547
2548 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2549 }
00ac37f5 2550 return sizeof(def_control_mpage);
1da177e4
LT		 2551}
2552
2553/**
2554 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2555 * @buf: output buffer
6ca8e794 2556 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2557 *
2558 * Generate a generic MODE SENSE r/w error recovery page.
2559 *
2560 * LOCKING:
2561 * None.
2562 */
6ca8e794 2563static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
1da177e4 2564{
6ca8e794
PB		 2565 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2566 changeable);
00ac37f5 2567 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2568}
2569
48bdc8ec
JA		 2570/*
2571 * We can turn this into a real blacklist if it's needed, for now just
2572 * blacklist any Maxtor BANC1G10 revision firmware
2573 */
2574static int ata_dev_supports_fua(u16 *id)
2575{
a0cf733b 2576 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2577
c3c013a2
JG		 2578 if (!libata_fua)
2579 return 0;
48bdc8ec
JA		 2580 if (!ata_id_has_fua(id))
2581 return 0;
2582
a0cf733b
TH		 2583 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2584 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2585
2e02671d 2586 if (strcmp(model, "Maxtor"))
48bdc8ec 2587 return 1;
2e02671d 2588 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2589 return 1;
2590
2591 return 0; /* blacklisted */
2592}
2593
1da177e4
LT		 2594/**
2595 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2596 * @args: device IDENTIFY data / SCSI command of interest.
2597 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2598 *
00ac37f5
DG		 2599 * Simulate MODE SENSE commands. Assume this is invoked for direct
2600 * access devices (e.g. disks) only. There should be no block
2601 * descriptor for other device types.
1da177e4
LT		 2602 *
2603 * LOCKING:
cca3974e 2604 * spin_lock_irqsave(host lock)
1da177e4 2605 */
87340e98 2606static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2607{
9a3dccc4 2608 struct ata_device *dev = args->dev;
87340e98 2609 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2610 const u8 sat_blk_desc[] = {
2611 0, 0, 0, 0, /* number of blocks: sat unspecified */
2612 0,
2613 0, 0x2, 0x0 /* block length: 512 bytes */
2614 };
2615 u8 pg, spg;
87340e98 2616 unsigned int ebd, page_control, six_byte;
0df10b84 2617 u8 dpofua, bp = 0xff;
bcfc867d 2618 u16 fp;
1da177e4
LT		 2619
2620 VPRINTK("ENTER\n");
2621
2622 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2623 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2624 /*
2625 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2626 */
00ac37f5 2627
1da177e4 2628 page_control = scsicmd[2] >> 6;
ae006510
DG		 2629 switch (page_control) {
2630 case 0: /* current */
6ca8e794
PB		 2631 case 1: /* changeable */
2632 case 2: /* defaults */
ae006510
DG		 2633 break; /* supported */
2634 case 3: /* saved */
2635 goto saving_not_supp;
ae006510 2636 default:
bcfc867d 2637 fp = 2;
0df10b84 2638 bp = 6;
ae006510
DG		 2639 goto invalid_fld;
2640 }
1da177e4 2641
87340e98
TH		 2642 if (six_byte)
2643 p += 4 + (ebd ? 8 : 0);
2644 else
2645 p += 8 + (ebd ? 8 : 0);
1da177e4 2646
00ac37f5
DG		 2647 pg = scsicmd[2] & 0x3f;
2648 spg = scsicmd[3];
2649 /*
2650 * No mode subpages supported (yet) but asking for _all_
2651 * subpages may be valid
2652 */
bcfc867d
HR		 2653 if (spg && (spg != ALL_SUB_MPAGES)) {
2654 fp = 3;
00ac37f5 2655 goto invalid_fld;
bcfc867d 2656 }
00ac37f5
DG		 2657
2658 switch(pg) {
2659 case RW_RECOVERY_MPAGE:
6ca8e794 2660 p += ata_msense_rw_recovery(p, page_control == 1);
1da177e4
LT		 2661 break;
2662
00ac37f5 2663 case CACHE_MPAGE:
6ca8e794 2664 p += ata_msense_caching(args->id, p, page_control == 1);
1da177e4
LT		 2665 break;
2666
87340e98 2667 case CONTROL_MPAGE:
f086b748 2668 p += ata_msense_control(args->dev, p, page_control == 1);
1da177e4 2669 break;
1da177e4 2670
00ac37f5 2671 case ALL_MPAGES:
6ca8e794
PB		 2672 p += ata_msense_rw_recovery(p, page_control == 1);
2673 p += ata_msense_caching(args->id, p, page_control == 1);
f086b748 2674 p += ata_msense_control(args->dev, p, page_control == 1);
1da177e4
LT		 2675 break;
2676
2677 default: /* invalid page code */
bcfc867d 2678 fp = 2;
ae006510 2679 goto invalid_fld;
1da177e4
LT		 2680 }
2681
9a3dccc4 2682 dpofua = 0;
f79d409f 2683 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2684 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2685 dpofua = 1 << 4;
2686
1da177e4 2687 if (six_byte) {
87340e98
TH		 2688 rbuf[0] = p - rbuf - 1;
2689 rbuf[2] |= dpofua;
00ac37f5 2690 if (ebd) {
87340e98
TH		 2691 rbuf[3] = sizeof(sat_blk_desc);
2692 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2693 }
1da177e4 2694 } else {
87340e98
TH		 2695 unsigned int output_len = p - rbuf - 2;
2696
1da177e4 2697 rbuf[0] = output_len >> 8;
87340e98
TH		 2698 rbuf[1] = output_len;
2699 rbuf[3] |= dpofua;
00ac37f5 2700 if (ebd) {
87340e98
TH		 2701 rbuf[7] = sizeof(sat_blk_desc);
2702 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2703 }
1da177e4 2704 }
1da177e4 2705 return 0;
ae006510
DG		 2706
2707invalid_fld:
0df10b84 2708 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
ae006510
DG		 2709 return 1;
2710
2711saving_not_supp:
06dbde5f 2712 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
ae006510
DG		 2713 /* "Saving parameters not supported" */
2714 return 1;
1da177e4
LT		 2715}
2716
2717/**
2718 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2719 * @args: device IDENTIFY data / SCSI command of interest.
2720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2721 *
2722 * Simulate READ CAPACITY commands.
2723 *
2724 * LOCKING:
6a36261e 2725 * None.
1da177e4 2726 */
87340e98 2727static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2728{
61d79a8e
MP		 2729 struct ata_device *dev = args->dev;
2730 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2731 u32 sector_size; /* physical sector size in bytes */
2732 u8 log2_per_phys;
2733 u16 lowest_aligned;
2734
2735 sector_size = ata_id_logical_sector_size(dev->id);
2736 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2737 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2738
2739 VPRINTK("ENTER\n");
2740
1da177e4 2741 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2742 if (last_lba >= 0xffffffffULL)
2743 last_lba = 0xffffffff;
0c144d0d 2744
1da177e4 2745 /* sector count, 32-bit */
87340e98
TH		 2746 rbuf[0] = last_lba >> (8 * 3);
2747 rbuf[1] = last_lba >> (8 * 2);
2748 rbuf[2] = last_lba >> (8 * 1);
2749 rbuf[3] = last_lba;
1da177e4
LT		 2750
2751 /* sector size */
295124dc
GG		 2752 rbuf[4] = sector_size >> (8 * 3);
2753 rbuf[5] = sector_size >> (8 * 2);
2754 rbuf[6] = sector_size >> (8 * 1);
2755 rbuf[7] = sector_size;
1da177e4
LT		 2756 } else {
2757 /* sector count, 64-bit */
87340e98
TH		 2758 rbuf[0] = last_lba >> (8 * 7);
2759 rbuf[1] = last_lba >> (8 * 6);
2760 rbuf[2] = last_lba >> (8 * 5);
2761 rbuf[3] = last_lba >> (8 * 4);
2762 rbuf[4] = last_lba >> (8 * 3);
2763 rbuf[5] = last_lba >> (8 * 2);
2764 rbuf[6] = last_lba >> (8 * 1);
2765 rbuf[7] = last_lba;
1da177e4
LT		 2766
2767 /* sector size */
295124dc
GG		 2768 rbuf[ 8] = sector_size >> (8 * 3);
2769 rbuf[ 9] = sector_size >> (8 * 2);
2770 rbuf[10] = sector_size >> (8 * 1);
2771 rbuf[11] = sector_size;
61d79a8e
MP		 2772
2773 rbuf[12] = 0;
295124dc 2774 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2775 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2776 rbuf[15] = lowest_aligned;
18f0f978 2777
71d126fd
AF		 2778 if (ata_id_has_trim(args->id) &&
2779 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
e61f7d1c 2780 rbuf[14] |= 0x80; /* LBPME */
e78db4df 2781
e61f7d1c
MP		 2782 if (ata_id_has_zero_after_trim(args->id) &&
2783 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2784 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2785 rbuf[14] |= 0x40; /* LBPRZ */
2786 }
e78db4df 2787 }
6d1003ae
HR		 2788 if (ata_id_zoned_cap(args->id) ||
2789 args->dev->class == ATA_DEV_ZAC)
2790 rbuf[12] = (1 << 4); /* RC_BASIS */
1da177e4 2791 }
1da177e4
LT		 2792 return 0;
2793}
2794
2795/**
2796 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2797 * @args: device IDENTIFY data / SCSI command of interest.
2798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2799 *
2800 * Simulate REPORT LUNS command.
2801 *
2802 * LOCKING:
cca3974e 2803 * spin_lock_irqsave(host lock)
1da177e4 2804 */
87340e98 2805static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2806{
2807 VPRINTK("ENTER\n");
2808 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2809
2810 return 0;
2811}
2812
77853bf2 2813static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2814{
74e6c8c3 2815 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2816 /* FIXME: not quite right; we don't want the
2817 * translation of taskfile registers into
2818 * a sense descriptors, since that's only
2819 * correct for ATA, not ATAPI
2820 */
750426aa 2821 ata_gen_passthru_sense(qc);
74e6c8c3 2822 }
a939c963 2823
2aa8f5d6 2824 ata_qc_done(qc);
c6e6e666 2825}
a939c963 2826
c6e6e666
JG		 2827/* is it pointless to prefer PIO for "safety reasons"? */
2828static inline int ata_pio_use_silly(struct ata_port *ap)
2829{
2830 return (ap->flags & ATA_FLAG_PIO_DMA);
2831}
2832
2833static void atapi_request_sense(struct ata_queued_cmd *qc)
2834{
2835 struct ata_port *ap = qc->ap;
2836 struct scsi_cmnd *cmd = qc->scsicmd;
2837
2838 DPRINTK("ATAPI request sense\n");
a939c963 2839
7ccd720d 2840 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2841
127102ae 2842#ifdef CONFIG_ATA_SFF
855d854a
JB		 2843 if (ap->ops->sff_tf_read)
2844 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2845#endif
c6e6e666
JG		 2846
2847 /* fill these in, for the case where they are -not- overwritten */
2848 cmd->sense_buffer[0] = 0x70;
2849 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2850
2851 ata_qc_reinit(qc);
2852
93f8fecb 2853 /* setup sg table and init transfer direction */
cadb7345 2854 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2855 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2856 qc->dma_dir = DMA_FROM_DEVICE;
2857
6e7846e9 2858 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2859 qc->cdb[0] = REQUEST_SENSE;
2860 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2861
2862 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2863 qc->tf.command = ATA_CMD_PACKET;
2864
c6e6e666 2865 if (ata_pio_use_silly(ap)) {
0dc36888 2866 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2867 qc->tf.feature |= ATAPI_PKT_DMA;
2868 } else {
0dc36888 2869 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2870 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2871 qc->tf.lbah = 0;
c6e6e666 2872 }
a939c963
JG		 2873 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2874
c6e6e666 2875 qc->complete_fn = atapi_sense_complete;
a939c963 2876
8e0e694a 2877 ata_qc_issue(qc);
a939c963
JG		 2878
2879 DPRINTK("EXIT\n");
2880}
2881
aa18da8b
CH		 2882/*
2883 * ATAPI devices typically report zero for their SCSI version, and sometimes
2884 * deviate from the spec WRT response data format. If SCSI version is
2885 * reported as zero like normal, then we make the following fixups:
2886 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2887 * modern device.
2888 * 2) Ensure response data format / ATAPI information are always correct.
2889 */
2890static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2891{
2892 u8 buf[4];
2893
2894 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2895 if (buf[2] == 0) {
2896 buf[2] = 0x5;
2897 buf[3] = 0x32;
2898 }
2899 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2900}
2901
77853bf2 2902static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2903{
2904 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2905 unsigned int err_mask = qc->err_mask;
1da177e4 2906
a7dac447 2907 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2908
246619da
TH		 2909 /* handle completion from new EH */
2910 if (unlikely(qc->ap->ops->error_handler &&
2911 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2912
2913 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2914 /* FIXME: not quite right; we don't want the
2915 * translation of taskfile registers into a
2916 * sense descriptors, since that's only
2917 * correct for ATA, not ATAPI
2918 */
750426aa 2919 ata_gen_passthru_sense(qc);
246619da
TH		 2920 }
2921
22aac089
TH		 2922 /* SCSI EH automatically locks door if sdev->locked is
2923 * set. Sometimes door lock request continues to
2924 * fail, for example, when no media is present. This
2925 * creates a loop - SCSI EH issues door lock which
2926 * fails and gets invoked again to acquire sense data
2927 * for the failed command.
2928 *
2929 * If door lock fails, always clear sdev->locked to
2930 * avoid this infinite loop.
2a5f07b5
TH		 2931 *
2932 * This may happen before SCSI scan is complete. Make
2933 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2934 */
2a5f07b5 2935 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2936 qc->dev->sdev->locked = 0;
2937
246619da 2938 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2aa8f5d6 2939 ata_qc_done(qc);
246619da
TH		 2940 return;
2941 }
2942
2943 /* successful completion or old EH failure path */
a7dac447 2944 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2945 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2946 atapi_request_sense(qc);
77853bf2 2947 return;
74e6c8c3 2948 } else if (unlikely(err_mask)) {
a7dac447
JG		 2949 /* FIXME: not quite right; we don't want the
2950 * translation of taskfile registers into
2951 * a sense descriptors, since that's only
2952 * correct for ATA, not ATAPI
2953 */
750426aa 2954 ata_gen_passthru_sense(qc);
74e6c8c3 2955 } else {
aa18da8b
CH		 2956 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2957 atapi_fixup_inquiry(cmd);
1da177e4
LT		 2958 cmd->result = SAM_STAT_GOOD;
2959 }
2960
2aa8f5d6 2961 ata_qc_done(qc);
1da177e4
LT		 2962}
2963/**
2964 * atapi_xlat - Initialize PACKET taskfile
2965 * @qc: command structure to be initialized
1da177e4
LT		 2966 *
2967 * LOCKING:
cca3974e 2968 * spin_lock_irqsave(host lock)
1da177e4
LT		 2969 *
2970 * RETURNS:
2971 * Zero on success, non-zero on failure.
2972 */
ad706991 2973static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2974{
542b1444 2975 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2976 struct ata_device *dev = qc->dev;
542b1444 2977 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2978 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2979 unsigned int nbytes;
1da177e4 2980
2e5704f6
TH		 2981 memset(qc->cdb, 0, dev->cdb_len);
2982 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2983
2984 qc->complete_fn = atapi_qc_complete;
2985
2986 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2987 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2988 qc->tf.flags |= ATA_TFLAG_WRITE;
2989 DPRINTK("direction: write\n");
2990 }
2991
2992 qc->tf.command = ATA_CMD_PACKET;
aacda375 2993 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2994
2995 /* check whether ATAPI DMA is safe */
5895ef9a 2996 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2997 using_pio = 1;
1da177e4 2998
e190222d
TH		 2999 /* Some controller variants snoop this value for Packet
3000 * transfers to do state machine and FIFO management. Thus we
3001 * want to set it properly, and for DMA where it is
3002 * effectively meaningless.
3003 */
aacda375 3004 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 3005
e190222d
TH		 3006 /* Most ATAPI devices which honor transfer chunk size don't
3007 * behave according to the spec when odd chunk size which
3008 * matches the transfer length is specified. If the number of
3009 * bytes to transfer is 2n+1. According to the spec, what
3010 * should happen is to indicate that 2n+1 is going to be
3011 * transferred and transfer 2n+2 bytes where the last byte is
3012 * padding.
3013 *
3014 * In practice, this doesn't happen. ATAPI devices first
3015 * indicate and transfer 2n bytes and then indicate and
3016 * transfer 2 bytes where the last byte is padding.
3017 *
3018 * This inconsistency confuses several controllers which
3019 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3020 * These controllers use actual number of transferred bytes to
3021 * update DMA poitner and transfer of 4n+2 bytes make those
3022 * controller push DMA pointer by 4n+4 bytes because SATA data
3023 * FISes are aligned to 4 bytes. This causes data corruption
3024 * and buffer overrun.
3025 *
3026 * Always setting nbytes to even number solves this problem
3027 * because then ATAPI devices don't have to split data at 2n
3028 * boundaries.
3029 */
3030 if (nbytes & 0x1)
3031 nbytes++;
3032
2db78dd3
AC		 3033 qc->tf.lbam = (nbytes & 0xFF);
3034 qc->tf.lbah = (nbytes >> 8);
3035
5895ef9a
TH		 3036 if (nodata)
3037 qc->tf.protocol = ATAPI_PROT_NODATA;
3038 else if (using_pio)
3039 qc->tf.protocol = ATAPI_PROT_PIO;
3040 else {
e00f1ff3 3041 /* DMA data xfer */
0dc36888 3042 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 3043 qc->tf.feature |= ATAPI_PKT_DMA;
3044
91163006
TH		 3045 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3046 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 3047 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 3048 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 3049 }
3050
2db78dd3
AC		 3051
3052 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3053 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 3054 return 0;
3055}
3056
2dcb407e 3057static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 3058{
071f44b1 3059 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3060 if (likely(devno < ata_link_max_devices(&ap->link)))
3061 return &ap->link.device[devno];
3062 } else {
3063 if (likely(devno < ap->nr_pmp_links))
3064 return &ap->pmp_link[devno].device[0];
3065 }
3066
ab5b3a5b
TH		 3067 return NULL;
3068}
3069
2dcb407e
JG		 3070static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3071 const struct scsi_device *scsidev)
ab5b3a5b 3072{
41bda9c9
TH		 3073 int devno;
3074
ab5b3a5b 3075 /* skip commands not addressed to targets we simulate */
071f44b1 3076 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3077 if (unlikely(scsidev->channel || scsidev->lun))
3078 return NULL;
3079 devno = scsidev->id;
3080 } else {
3081 if (unlikely(scsidev->id || scsidev->lun))
3082 return NULL;
3083 devno = scsidev->channel;
3084 }
ab5b3a5b 3085
41bda9c9 3086 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 3087}
3088
1da177e4
LT		 3089/**
3090 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3091 * @ap: ATA port to which the device is attached
3092 * @scsidev: SCSI device from which we derive the ATA device
3093 *
3094 * Given various information provided in struct scsi_cmnd,
3095 * map that onto an ATA bus, and using that mapping
3096 * determine which ata_device is associated with the
3097 * SCSI command to be sent.
3098 *
3099 * LOCKING:
cca3974e 3100 * spin_lock_irqsave(host lock)
1da177e4
LT		 3101 *
3102 * RETURNS:
3103 * Associated ATA device, or %NULL if not found.
3104 */
1da177e4 3105static struct ata_device *
057ace5e 3106ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 3107{
ab5b3a5b 3108 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 3109
2486fa56 3110 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 3111 return NULL;
3112
1da177e4
LT		 3113 return dev;
3114}
3115
b095518e
JG		 3116/*
3117 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3118 * @byte1: Byte 1 from pass-thru CDB.
3119 *
3120 * RETURNS:
3121 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3122 */
3123static u8
3124ata_scsi_map_proto(u8 byte1)
3125{
3126 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 3127 case 3: /* Non-data */
3128 return ATA_PROT_NODATA;
3129
3130 case 6: /* DMA */
3131 case 10: /* UDMA Data-in */
3132 case 11: /* UDMA Data-Out */
3133 return ATA_PROT_DMA;
3134
3135 case 4: /* PIO Data-in */
3136 case 5: /* PIO Data-out */
3137 return ATA_PROT_PIO;
3138
ee7fb331
VK		 3139 case 12: /* FPDMA */
3140 return ATA_PROT_NCQ;
3141
2dcb407e
JG		 3142 case 0: /* Hard Reset */
3143 case 1: /* SRST */
3144 case 8: /* Device Diagnostic */
3145 case 9: /* Device Reset */
3146 case 7: /* DMA Queued */
2dcb407e
JG		 3147 case 15: /* Return Response Info */
3148 default: /* Reserved */
3149 break;
b095518e
JG		 3150 }
3151
3152 return ATA_PROT_UNKNOWN;
3153}
3154
3155/**
3156 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3157 * @qc: command structure to be initialized
b095518e
JG		 3158 *
3159 * Handles either 12 or 16-byte versions of the CDB.
3160 *
3161 * RETURNS:
3162 * Zero on success, non-zero on failure.
3163 */
ad706991 3164static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 3165{
3166 struct ata_taskfile *tf = &(qc->tf);
542b1444 3167 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 3168 struct ata_device *dev = qc->dev;
ad706991 3169 const u8 *cdb = scmd->cmnd;
bcfc867d 3170 u16 fp;
b095518e 3171
bcfc867d
HR		 3172 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) {
3173 fp = 1;
9a405257 3174 goto invalid_fld;
bcfc867d 3175 }
8190bdb9 3176
5b844b63
HR		 3177 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0)
3178 tf->protocol = ATA_PROT_NCQ_NODATA;
3179
5f8e7f17
VK		 3180 /* enable LBA */
3181 tf->flags |= ATA_TFLAG_LBA;
3182
b095518e
JG		 3183 /*
3184 * 12 and 16 byte CDBs use different offsets to
3185 * provide the various register values.
3186 */
542b1444 3187 if (cdb[0] == ATA_16) {
b095518e
JG		 3188 /*
3189 * 16-byte CDB - may contain extended commands.
3190 *
3191 * If that is the case, copy the upper byte register values.
3192 */
542b1444
TH		 3193 if (cdb[1] & 0x01) {
3194 tf->hob_feature = cdb[3];
3195 tf->hob_nsect = cdb[5];
3196 tf->hob_lbal = cdb[7];
3197 tf->hob_lbam = cdb[9];
3198 tf->hob_lbah = cdb[11];
b095518e
JG		 3199 tf->flags |= ATA_TFLAG_LBA48;
3200 } else
3201 tf->flags &= ~ATA_TFLAG_LBA48;
3202
3203 /*
3204 * Always copy low byte, device and command registers.
3205 */
542b1444
TH		 3206 tf->feature = cdb[4];
3207 tf->nsect = cdb[6];
3208 tf->lbal = cdb[8];
3209 tf->lbam = cdb[10];
3210 tf->lbah = cdb[12];
3211 tf->device = cdb[13];
3212 tf->command = cdb[14];
b095518e
JG		 3213 } else {
3214 /*
3215 * 12-byte CDB - incapable of extended commands.
3216 */
3217 tf->flags &= ~ATA_TFLAG_LBA48;
3218
542b1444
TH		 3219 tf->feature = cdb[3];
3220 tf->nsect = cdb[4];
3221 tf->lbal = cdb[5];
3222 tf->lbam = cdb[6];
3223 tf->lbah = cdb[7];
3224 tf->device = cdb[8];
3225 tf->command = cdb[9];
b095518e 3226 }
fa4453c4 3227
179b310a
HR		 3228 /* For NCQ commands copy the tag value */
3229 if (ata_is_ncq(tf->protocol))
ee7fb331
VK		 3230 tf->nsect = qc->tag << 3;
3231
fa4453c4
AL		 3232 /* enforce correct master/slave bit */
3233 tf->device = dev->devno ?
3234 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 3235
bd30add8 3236 switch (tf->command) {
295124dc 3237 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 3238 case ATA_CMD_READ_LONG:
3239 case ATA_CMD_READ_LONG_ONCE:
3240 case ATA_CMD_WRITE_LONG:
3241 case ATA_CMD_WRITE_LONG_ONCE:
bcfc867d
HR		 3242 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3243 fp = 1;
bd30add8 3244 goto invalid_fld;
bcfc867d 3245 }
bd30add8 3246 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 3247 break;
3248
3249 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3250 case ATA_CMD_CFA_WRITE_NE:
3251 case ATA_CMD_CFA_TRANS_SECT:
3252 case ATA_CMD_CFA_WRITE_MULT_NE:
3253 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3254 case ATA_CMD_READ:
3255 case ATA_CMD_READ_EXT:
3256 case ATA_CMD_READ_QUEUED:
3257 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3258 case ATA_CMD_FPDMA_READ:
3259 case ATA_CMD_READ_MULTI:
3260 case ATA_CMD_READ_MULTI_EXT:
3261 case ATA_CMD_PIO_READ:
3262 case ATA_CMD_PIO_READ_EXT:
3263 case ATA_CMD_READ_STREAM_DMA_EXT:
3264 case ATA_CMD_READ_STREAM_EXT:
3265 case ATA_CMD_VERIFY:
3266 case ATA_CMD_VERIFY_EXT:
3267 case ATA_CMD_WRITE:
3268 case ATA_CMD_WRITE_EXT:
3269 case ATA_CMD_WRITE_FUA_EXT:
3270 case ATA_CMD_WRITE_QUEUED:
3271 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3272 case ATA_CMD_FPDMA_WRITE:
3273 case ATA_CMD_WRITE_MULTI:
3274 case ATA_CMD_WRITE_MULTI_EXT:
3275 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3276 case ATA_CMD_PIO_WRITE:
3277 case ATA_CMD_PIO_WRITE_EXT:
3278 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3279 case ATA_CMD_WRITE_STREAM_EXT:
3280 qc->sect_size = scmd->device->sector_size;
3281 break;
3282
3283 /* Everything else uses 512 byte "sectors" */
3284 default:
3285 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 3286 }
3287
3288 /*
3289 * Set flags so that all registers will be written, pass on
3290 * write indication (used for PIO/DMA setup), result TF is
3291 * copied back and we don't whine too much about its failure.
3292 */
bc496ed0 3293 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 3294 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3295 tf->flags |= ATA_TFLAG_WRITE;
3296
3297 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3298
3299 /*
3300 * Set transfer length.
3301 *
3302 * TODO: find out if we need to do more here to
3303 * cover scatter/gather case.
3304 */
3305 ata_qc_set_pc_nbytes(qc);
3306
3307 /* We may not issue DMA commands if no DMA mode is set */
bcfc867d
HR		 3308 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3309 fp = 1;
bd30add8 3310 goto invalid_fld;
bcfc867d 3311 }
bd30add8 3312
1dce589c 3313 /* sanity check for pio multi commands */
bcfc867d
HR		 3314 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3315 fp = 1;
1dce589c 3316 goto invalid_fld;
bcfc867d 3317 }
1dce589c
AL		 3318
3319 if (is_multi_taskfile(tf)) {
3320 unsigned int multi_count = 1 << (cdb[1] >> 5);
3321
3322 /* compare the passed through multi_count
3323 * with the cached multi_count of libata
3324 */
3325 if (multi_count != dev->multi_count)
a9a79dfe
JP		 3326 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3327 multi_count);
d26fc955 3328 }
1dce589c 3329
b095518e
JG		 3330 /*
3331 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3332 * SET_FEATURES - XFER MODE must be preceded/succeeded
3333 * by an update to hardware-specific registers for each
3334 * controller (i.e. the reason for ->set_piomode(),
3335 * ->set_dmamode(), and ->post_set_mode() hooks).
3336 */
bd30add8 3337 if (tf->command == ATA_CMD_SET_FEATURES &&
bcfc867d
HR		 3338 tf->feature == SETFEATURES_XFER) {
3339 fp = (cdb[0] == ATA_16) ? 4 : 3;
9a405257 3340 goto invalid_fld;
bcfc867d 3341 }
b095518e
JG		 3342
3343 /*
bd30add8
TH		 3344 * Filter TPM commands by default. These provide an
3345 * essentially uncontrolled encrypted "back door" between
3346 * applications and the disk. Set libata.allow_tpm=1 if you
3347 * have a real reason for wanting to use them. This ensures
3348 * that installed software cannot easily mess stuff up without
3349 * user intent. DVR type users will probably ship with this enabled
3350 * for movie content management.
b095518e 3351 *
bd30add8
TH		 3352 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3353 * for this and should do in future but that it is not sufficient as
3354 * DCS is an optional feature set. Thus we also do the software filter
3355 * so that we comply with the TC consortium stated goal that the user
3356 * can turn off TC features of their system.
b095518e 3357 */
bcfc867d
HR		 3358 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3359 fp = (cdb[0] == ATA_16) ? 14 : 9;
bd30add8 3360 goto invalid_fld;
bcfc867d 3361 }
e61e0672 3362
b095518e 3363 return 0;
9a405257
TH		 3364
3365 invalid_fld:
0df10b84 3366 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
9a405257 3367 return 1;
b095518e
JG		 3368}
3369
9379e6b8
ST		 3370/**
3371 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3372 * @cmd: SCSI command being translated
ef2d7392 3373 * @trmax: Maximum number of entries that will fit in sector_size bytes.
9379e6b8 3374 * @sector: Starting sector
7b203094 3375 * @count: Total Range of request in logical sectors
9379e6b8
ST		 3376 *
3377 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3378 * descriptor.
3379 *
3380 * Upto 64 entries of the format:
3381 * 63:48 Range Length
3382 * 47:0 LBA
3383 *
3384 * Range Length of 0 is ignored.
3385 * LBA's should be sorted order and not overlap.
3386 *
3387 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
ef2d7392
ST		 3388 *
3389 * Return: Number of bytes copied into sglist.
9379e6b8 3390 */
ef2d7392
ST		 3391static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3392 u64 sector, u32 count)
3393{
3394 struct scsi_device *sdp = cmd->device;
3395 size_t len = sdp->sector_size;
3396 size_t r;
3397 __le64 *buf;
3398 u32 i = 0;
9379e6b8
ST		 3399 unsigned long flags;
3400
ef2d7392
ST		 3401 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3402
3403 if (len > ATA_SCSI_RBUF_SIZE)
3404 len = ATA_SCSI_RBUF_SIZE;
9379e6b8
ST		 3405
3406 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
ef2d7392
ST		 3407 buf = ((void *)ata_scsi_rbuf);
3408 memset(buf, 0, len);
3409 while (i < trmax) {
9379e6b8
ST		 3410 u64 entry = sector |
3411 ((u64)(count > 0xffff ? 0xffff : count) << 48);
ef2d7392 3412 buf[i++] = __cpu_to_le64(entry);
9379e6b8
ST		 3413 if (count <= 0xffff)
3414 break;
3415 count -= 0xffff;
3416 sector += 0xffff;
3417 }
ef2d7392 3418 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
9379e6b8
ST		 3419 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3420
ef2d7392 3421 return r;
9379e6b8
ST		 3422}
3423
7b203094
ST		 3424/**
3425 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same
3426 * @cmd: SCSI command being translated
3427 * @lba: Starting sector
ef2d7392 3428 * @num: Number of sectors to be zero'd.
7b203094 3429 *
ef2d7392 3430 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted
7b203094
ST		 3431 * descriptor.
3432 * NOTE: Writes a pattern (0's) in the foreground.
ef2d7392
ST		 3433 *
3434 * Return: Number of bytes copied into sglist.
7b203094 3435 */
ef2d7392 3436static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num)
7b203094 3437{
ef2d7392
ST		 3438 struct scsi_device *sdp = cmd->device;
3439 size_t len = sdp->sector_size;
3440 size_t r;
3441 u16 *buf;
7b203094
ST		 3442 unsigned long flags;
3443
3444 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
ef2d7392
ST		 3445 buf = ((void *)ata_scsi_rbuf);
3446
3447 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */
3448 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */
3449 put_unaligned_le64(lba, &buf[2]);
3450 put_unaligned_le64(num, &buf[6]);
3451 put_unaligned_le32(0u, &buf[10]); /* pattern */
7b203094 3452
ef2d7392 3453 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
7b203094 3454
ef2d7392
ST		 3455 if (len > ATA_SCSI_RBUF_SIZE)
3456 len = ATA_SCSI_RBUF_SIZE;
3457
3458 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
7b203094 3459 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
ef2d7392
ST		 3460
3461 return r;
7b203094
ST		 3462}
3463
3464/**
3465 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3466 * @qc: Command to be translated
3467 *
3468 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3469 * an SCT Write Same command.
3470 * Based on WRITE SAME has the UNMAP flag
3471 * When set translate to DSM TRIM
3472 * When clear translate to SCT Write Same
3473 */
18f0f978
CH		 3474static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3475{
3476 struct ata_taskfile *tf = &qc->tf;
3477 struct scsi_cmnd *scmd = qc->scsicmd;
ef2d7392
ST		 3478 struct scsi_device *sdp = scmd->device;
3479 size_t len = sdp->sector_size;
18f0f978
CH		 3480 struct ata_device *dev = qc->dev;
3481 const u8 *cdb = scmd->cmnd;
3482 u64 block;
3483 u32 n_block;
ef2d7392 3484 const u32 trmax = len >> 3;
18f0f978 3485 u32 size;
bcfc867d 3486 u16 fp;
0df10b84 3487 u8 bp = 0xff;
7b203094 3488 u8 unmap = cdb[1] & 0x8;
18f0f978
CH		 3489
3490 /* we may not issue DMA commands if no DMA mode is set */
3491 if (unlikely(!dev->dma_mode))
bcfc867d 3492 goto invalid_opcode;
18f0f978 3493
bcfc867d
HR		 3494 if (unlikely(scmd->cmd_len < 16)) {
3495 fp = 15;
18f0f978 3496 goto invalid_fld;
bcfc867d 3497 }
18f0f978
CH		 3498 scsi_16_lba_len(cdb, &block, &n_block);
3499
7b203094
ST		 3500 if (unmap) {
3501 /* If trim is not enabled the cmd is invalid. */
3502 if ((dev->horkage & ATA_HORKAGE_NOTRIM) ||
3503 !ata_id_has_trim(dev->id)) {
3504 fp = 1;
3505 bp = 3;
3506 goto invalid_fld;
3507 }
3508 /* If the request is too large the cmd is invalid */
3509 if (n_block > 0xffff * trmax) {
3510 fp = 2;
3511 goto invalid_fld;
3512 }
3513 } else {
3514 /* If write same is not available the cmd is invalid */
3515 if (!ata_id_sct_write_same(dev->id)) {
3516 fp = 1;
3517 bp = 3;
3518 goto invalid_fld;
3519 }
bcfc867d 3520 }
18f0f978
CH		 3521
3522 /*
3523 * WRITE SAME always has a sector sized buffer as payload, this
3524 * should never be a multiple entry S/G list.
3525 */
3526 if (!scsi_sg_count(scmd))
bcfc867d 3527 goto invalid_param_len;
18f0f978 3528
ef2d7392
ST		 3529 /*
3530 * size must match sector size in bytes
3531 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3532 * is defined as number of 512 byte blocks to be transferred.
3533 */
7b203094 3534 if (unmap) {
9379e6b8 3535 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
ef2d7392
ST		 3536 if (size != len)
3537 goto invalid_param_len;
3538
7b203094
ST		 3539 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3540 /* Newer devices support queued TRIM commands */
3541 tf->protocol = ATA_PROT_NCQ;
3542 tf->command = ATA_CMD_FPDMA_SEND;
3543 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3544 tf->nsect = qc->tag << 3;
3545 tf->hob_feature = (size / 512) >> 8;
3546 tf->feature = size / 512;
3547
3548 tf->auxiliary = 1;
3549 } else {
3550 tf->protocol = ATA_PROT_DMA;
3551 tf->hob_feature = 0;
3552 tf->feature = ATA_DSM_TRIM;
3553 tf->hob_nsect = (size / 512) >> 8;
3554 tf->nsect = size / 512;
3555 tf->command = ATA_CMD_DSM;
3556 }
5c79097a 3557 } else {
ef2d7392
ST		 3558 size = ata_format_sct_write_same(scmd, block, n_block);
3559 if (size != len)
3560 goto invalid_param_len;
87fb6c31 3561
87fb6c31 3562 tf->hob_feature = 0;
7b203094
ST		 3563 tf->feature = 0;
3564 tf->hob_nsect = 0;
3565 tf->nsect = 1;
3566 tf->lbah = 0;
3567 tf->lbam = 0;
3568 tf->lbal = ATA_CMD_STANDBYNOW1;
3569 tf->hob_lbah = 0;
3570 tf->hob_lbam = 0;
3571 tf->hob_lbal = 0;
3572 tf->device = ATA_CMD_STANDBYNOW1;
3573 tf->protocol = ATA_PROT_DMA;
3574 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT;
7d36dd00
ST		 3575 if (unlikely(dev->flags & ATA_DFLAG_PIO))
3576 tf->command = ATA_CMD_WRITE_LOG_EXT;
87fb6c31
MC		 3577 }
3578
18f0f978
CH		 3579 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3580 ATA_TFLAG_WRITE;
3581
3582 ata_qc_set_pc_nbytes(qc);
3583
3584 return 0;
3585
bcfc867d 3586invalid_fld:
0df10b84 3587 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
bcfc867d
HR		 3588 return 1;
3589invalid_param_len:
3590 /* "Parameter list length error" */
3591 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3592 return 1;
3593invalid_opcode:
3594 /* "Invalid command operation code" */
3595 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
18f0f978
CH		 3596 return 1;
3597}
3598
7b203094
ST		 3599/**
3600 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3601 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3602 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3603 *
3604 * Yields a subset to satisfy scsi_report_opcode()
3605 *
3606 * LOCKING:
3607 * spin_lock_irqsave(host lock)
3608 */
3609static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3610{
3611 struct ata_device *dev = args->dev;
3612 u8 *cdb = args->cmd->cmnd;
3613 u8 supported = 0;
3614 unsigned int err = 0;
3615
3616 if (cdb[2] != 1) {
3617 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3618 err = 2;
3619 goto out;
3620 }
3621 switch (cdb[3]) {
3622 case INQUIRY:
3623 case MODE_SENSE:
3624 case MODE_SENSE_10:
3625 case READ_CAPACITY:
3626 case SERVICE_ACTION_IN_16:
3627 case REPORT_LUNS:
3628 case REQUEST_SENSE:
3629 case SYNCHRONIZE_CACHE:
3630 case REZERO_UNIT:
3631 case SEEK_6:
3632 case SEEK_10:
3633 case TEST_UNIT_READY:
3634 case SEND_DIAGNOSTIC:
3635 case MAINTENANCE_IN:
3636 case READ_6:
3637 case READ_10:
3638 case READ_16:
3639 case WRITE_6:
3640 case WRITE_10:
3641 case WRITE_16:
3642 case ATA_12:
3643 case ATA_16:
3644 case VERIFY:
3645 case VERIFY_16:
3646 case MODE_SELECT:
3647 case MODE_SELECT_10:
3648 case START_STOP:
3649 supported = 3;
3650 break;
3651 case WRITE_SAME_16:
0ce1b18c
ST		 3652 if (!ata_id_sct_write_same(dev->id))
3653 break;
3654 /* fallthrough: if SCT ... only enable for ZBC */
7b203094
ST		 3655 case ZBC_IN:
3656 case ZBC_OUT:
3657 if (ata_id_zoned_cap(dev->id) ||
3658 dev->class == ATA_DEV_ZAC)
3659 supported = 3;
3660 break;
3661 default:
3662 break;
3663 }
3664out:
3665 rbuf[1] = supported; /* supported */
3666 return err;
3667}
3668
28a3fc22
HR		 3669/**
3670 * ata_scsi_report_zones_complete - convert ATA output
3671 * @qc: command structure returning the data
3672 *
3673 * Convert T-13 little-endian field representation into
3674 * T-10 big-endian field representation.
3675 * What a mess.
3676 */
3677static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3678{
3679 struct scsi_cmnd *scmd = qc->scsicmd;
3680 struct sg_mapping_iter miter;
3681 unsigned long flags;
3682 unsigned int bytes = 0;
3683
3684 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3685 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3686
3687 local_irq_save(flags);
3688 while (sg_miter_next(&miter)) {
3689 unsigned int offset = 0;
3690
3691 if (bytes == 0) {
3692 char *hdr;
3693 u32 list_length;
3694 u64 max_lba, opt_lba;
3695 u16 same;
3696
3697 /* Swizzle header */
3698 hdr = miter.addr;
3699 list_length = get_unaligned_le32(&hdr[0]);
3700 same = get_unaligned_le16(&hdr[4]);
3701 max_lba = get_unaligned_le64(&hdr[8]);
3702 opt_lba = get_unaligned_le64(&hdr[16]);
3703 put_unaligned_be32(list_length, &hdr[0]);
3704 hdr[4] = same & 0xf;
3705 put_unaligned_be64(max_lba, &hdr[8]);
3706 put_unaligned_be64(opt_lba, &hdr[16]);
3707 offset += 64;
3708 bytes += 64;
3709 }
3710 while (offset < miter.length) {
3711 char *rec;
3712 u8 cond, type, non_seq, reset;
3713 u64 size, start, wp;
3714
3715 /* Swizzle zone descriptor */
3716 rec = miter.addr + offset;
3717 type = rec[0] & 0xf;
3718 cond = (rec[1] >> 4) & 0xf;
3719 non_seq = (rec[1] & 2);
3720 reset = (rec[1] & 1);
3721 size = get_unaligned_le64(&rec[8]);
3722 start = get_unaligned_le64(&rec[16]);
3723 wp = get_unaligned_le64(&rec[24]);
3724 rec[0] = type;
3725 rec[1] = (cond << 4) | non_seq | reset;
3726 put_unaligned_be64(size, &rec[8]);
3727 put_unaligned_be64(start, &rec[16]);
3728 put_unaligned_be64(wp, &rec[24]);
3729 WARN_ON(offset + 64 > miter.length);
3730 offset += 64;
3731 bytes += 64;
3732 }
3733 }
3734 sg_miter_stop(&miter);
3735 local_irq_restore(flags);
3736
3737 ata_scsi_qc_complete(qc);
3738}
3739
3740static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3741{
3742 struct ata_taskfile *tf = &qc->tf;
3743 struct scsi_cmnd *scmd = qc->scsicmd;
3744 const u8 *cdb = scmd->cmnd;
3745 u16 sect, fp = (u16)-1;
3746 u8 sa, options, bp = 0xff;
3747 u64 block;
3748 u32 n_block;
3749
3750 if (unlikely(scmd->cmd_len < 16)) {
3751 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3752 scmd->cmd_len);
3753 fp = 15;
3754 goto invalid_fld;
3755 }
3756 scsi_16_lba_len(cdb, &block, &n_block);
3757 if (n_block != scsi_bufflen(scmd)) {
3758 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3759 n_block, scsi_bufflen(scmd));
3760 goto invalid_param_len;
3761 }
3762 sa = cdb[1] & 0x1f;
3763 if (sa != ZI_REPORT_ZONES) {
3764 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3765 fp = 1;
3766 goto invalid_fld;
3767 }
3768 /*
3769 * ZAC allows only for transfers in 512 byte blocks,
3770 * and uses a 16 bit value for the transfer count.
3771 */
3772 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3773 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3774 goto invalid_param_len;
3775 }
3776 sect = n_block / 512;
3f17422b 3777 options = cdb[14] & 0xbf;
28a3fc22
HR		 3778
3779 if (ata_ncq_enabled(qc->dev) &&
3780 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3781 tf->protocol = ATA_PROT_NCQ;
3782 tf->command = ATA_CMD_FPDMA_RECV;
3783 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3784 tf->nsect = qc->tag << 3;
3785 tf->feature = sect & 0xff;
3786 tf->hob_feature = (sect >> 8) & 0xff;
3f17422b 3787 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
28a3fc22
HR		 3788 } else {
3789 tf->command = ATA_CMD_ZAC_MGMT_IN;
3790 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3791 tf->protocol = ATA_PROT_DMA;
3792 tf->hob_feature = options;
3793 tf->hob_nsect = (sect >> 8) & 0xff;
3794 tf->nsect = sect & 0xff;
3795 }
3796 tf->device = ATA_LBA;
3797 tf->lbah = (block >> 16) & 0xff;
3798 tf->lbam = (block >> 8) & 0xff;
3799 tf->lbal = block & 0xff;
3800 tf->hob_lbah = (block >> 40) & 0xff;
3801 tf->hob_lbam = (block >> 32) & 0xff;
3802 tf->hob_lbal = (block >> 24) & 0xff;
3803
3804 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3805 qc->flags |= ATA_QCFLAG_RESULT_TF;
3806
3807 ata_qc_set_pc_nbytes(qc);
3808
3809 qc->complete_fn = ata_scsi_report_zones_complete;
3810
3811 return 0;
3812
3813invalid_fld:
3814 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3815 return 1;
3816
3817invalid_param_len:
3818 /* "Parameter list length error" */
3819 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3820 return 1;
3821}
3822
27708a95
HR		 3823static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3824{
3825 struct ata_taskfile *tf = &qc->tf;
3826 struct scsi_cmnd *scmd = qc->scsicmd;
3827 struct ata_device *dev = qc->dev;
3828 const u8 *cdb = scmd->cmnd;
2950cefa 3829 u8 all, sa;
27708a95
HR		 3830 u64 block;
3831 u32 n_block;
3832 u16 fp = (u16)-1;
3833
3834 if (unlikely(scmd->cmd_len < 16)) {
3835 fp = 15;
3836 goto invalid_fld;
3837 }
3838
3839 sa = cdb[1] & 0x1f;
3840 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3841 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3842 fp = 1;
3843 goto invalid_fld;
3844 }
3845
3846 scsi_16_lba_len(cdb, &block, &n_block);
3847 if (n_block) {
3848 /*
3849 * ZAC MANAGEMENT OUT doesn't define any length
3850 */
3851 goto invalid_param_len;
3852 }
3853 if (block > dev->n_sectors)
3854 goto out_of_range;
3855
2950cefa 3856 all = cdb[14] & 0x1;
27708a95 3857
284b3b77
HR		 3858 if (ata_ncq_enabled(qc->dev) &&
3859 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
5b844b63 3860 tf->protocol = ATA_PROT_NCQ_NODATA;
284b3b77 3861 tf->command = ATA_CMD_NCQ_NON_DATA;
ee194b75 3862 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
284b3b77 3863 tf->nsect = qc->tag << 3;
2950cefa 3864 tf->auxiliary = sa | ((u16)all << 8);
284b3b77
HR		 3865 } else {
3866 tf->protocol = ATA_PROT_NODATA;
3867 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3868 tf->feature = sa;
2950cefa 3869 tf->hob_feature = all;
284b3b77 3870 }
27708a95
HR		 3871 tf->lbah = (block >> 16) & 0xff;
3872 tf->lbam = (block >> 8) & 0xff;
3873 tf->lbal = block & 0xff;
3874 tf->hob_lbah = (block >> 40) & 0xff;
3875 tf->hob_lbam = (block >> 32) & 0xff;
3876 tf->hob_lbal = (block >> 24) & 0xff;
3877 tf->device = ATA_LBA;
3878 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3879
3880 return 0;
3881
18f0f978 3882 invalid_fld:
27708a95
HR		 3883 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3884 return 1;
3885 out_of_range:
3886 /* "Logical Block Address out of range" */
3887 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
3888 return 1;
3889invalid_param_len:
3890 /* "Parameter list length error" */
3891 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
18f0f978
CH		 3892 return 1;
3893}
3894
1b26d29c
PB		 3895/**
3896 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3897 * @qc: Storage for translated ATA taskfile
3898 * @buf: input buffer
3899 * @len: number of valid bytes in the input buffer
7780081c 3900 * @fp: out parameter for the failed field on error
1b26d29c
PB		 3901 *
3902 * Prepare a taskfile to modify caching information for the device.
3903 *
3904 * LOCKING:
3905 * None.
3906 */
3907static int ata_mselect_caching(struct ata_queued_cmd *qc,
7780081c 3908 const u8 *buf, int len, u16 *fp)
1b26d29c
PB		 3909{
3910 struct ata_taskfile *tf = &qc->tf;
3911 struct ata_device *dev = qc->dev;
d7372cb6 3912 u8 mpage[CACHE_MPAGE_LEN];
1b26d29c 3913 u8 wce;
7780081c 3914 int i;
1b26d29c
PB		 3915
3916 /*
3917 * The first two bytes of def_cache_mpage are a header, so offsets
3918 * in mpage are off by 2 compared to buf. Same for len.
3919 */
3920
7780081c
HR		 3921 if (len != CACHE_MPAGE_LEN - 2) {
3922 if (len < CACHE_MPAGE_LEN - 2)
3923 *fp = len;
3924 else
3925 *fp = CACHE_MPAGE_LEN - 2;
1b26d29c 3926 return -EINVAL;
7780081c 3927 }
1b26d29c
PB		 3928
3929 wce = buf[0] & (1 << 2);
3930
3931 /*
3932 * Check that read-only bits are not modified.
3933 */
3934 ata_msense_caching(dev->id, mpage, false);
7780081c
HR		 3935 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3936 if (i == 0)
3937 continue;
3938 if (mpage[i + 2] != buf[i]) {
3939 *fp = i;
3940 return -EINVAL;
3941 }
3942 }
1b26d29c
PB		 3943
3944 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3945 tf->protocol = ATA_PROT_NODATA;
3946 tf->nsect = 0;
3947 tf->command = ATA_CMD_SET_FEATURES;
3948 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3949 return 0;
3950}
3951
06dbde5f
HR		 3952/**
3953 * ata_mselect_control - Simulate MODE SELECT for control page
3954 * @qc: Storage for translated ATA taskfile
3955 * @buf: input buffer
3956 * @len: number of valid bytes in the input buffer
7780081c 3957 * @fp: out parameter for the failed field on error
06dbde5f
HR		 3958 *
3959 * Prepare a taskfile to modify caching information for the device.
3960 *
3961 * LOCKING:
3962 * None.
3963 */
3964static int ata_mselect_control(struct ata_queued_cmd *qc,
7780081c 3965 const u8 *buf, int len, u16 *fp)
06dbde5f
HR		 3966{
3967 struct ata_device *dev = qc->dev;
d7372cb6 3968 u8 mpage[CONTROL_MPAGE_LEN];
06dbde5f 3969 u8 d_sense;
7780081c 3970 int i;
06dbde5f
HR		 3971
3972 /*
3973 * The first two bytes of def_control_mpage are a header, so offsets
3974 * in mpage are off by 2 compared to buf. Same for len.
3975 */
3976
7780081c
HR		 3977 if (len != CONTROL_MPAGE_LEN - 2) {
3978 if (len < CONTROL_MPAGE_LEN - 2)
3979 *fp = len;
3980 else
3981 *fp = CONTROL_MPAGE_LEN - 2;
06dbde5f 3982 return -EINVAL;
7780081c 3983 }
06dbde5f
HR		 3984
3985 d_sense = buf[0] & (1 << 2);
3986
3987 /*
3988 * Check that read-only bits are not modified.
3989 */
f086b748 3990 ata_msense_control(dev, mpage, false);
7780081c
HR		 3991 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3992 if (i == 0)
3993 continue;
3994 if (mpage[2 + i] != buf[i]) {
3995 *fp = i;
3996 return -EINVAL;
3997 }
3998 }
06dbde5f
HR		 3999 if (d_sense & (1 << 2))
4000 dev->flags |= ATA_DFLAG_D_SENSE;
4001 else
4002 dev->flags &= ~ATA_DFLAG_D_SENSE;
06dbde5f
HR		 4003 return 0;
4004}
4005
1b26d29c
PB		 4006/**
4007 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
4008 * @qc: Storage for translated ATA taskfile
4009 *
4010 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
4011 * Assume this is invoked for direct access devices (e.g. disks) only.
4012 * There should be no block descriptor for other device types.
4013 *
4014 * LOCKING:
4015 * spin_lock_irqsave(host lock)
4016 */
4017static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
4018{
4019 struct scsi_cmnd *scmd = qc->scsicmd;
4020 const u8 *cdb = scmd->cmnd;
4021 const u8 *p;
4022 u8 pg, spg;
4023 unsigned six_byte, pg_len, hdr_len, bd_len;
4024 int len;
7780081c
HR		 4025 u16 fp = (u16)-1;
4026 u8 bp = 0xff;
1b26d29c
PB		 4027
4028 VPRINTK("ENTER\n");
4029
4030 six_byte = (cdb[0] == MODE_SELECT);
4031 if (six_byte) {
bcfc867d
HR		 4032 if (scmd->cmd_len < 5) {
4033 fp = 4;
1b26d29c 4034 goto invalid_fld;
bcfc867d 4035 }
1b26d29c
PB		 4036
4037 len = cdb[4];
4038 hdr_len = 4;
4039 } else {
bcfc867d
HR		 4040 if (scmd->cmd_len < 9) {
4041 fp = 8;
1b26d29c 4042 goto invalid_fld;
bcfc867d 4043 }
1b26d29c
PB		 4044
4045 len = (cdb[7] << 8) + cdb[8];
4046 hdr_len = 8;
4047 }
4048
4049 /* We only support PF=1, SP=0. */
bcfc867d
HR		 4050 if ((cdb[1] & 0x11) != 0x10) {
4051 fp = 1;
0df10b84 4052 bp = (cdb[1] & 0x01) ? 1 : 5;
1b26d29c 4053 goto invalid_fld;
bcfc867d 4054 }
1b26d29c
PB		 4055
4056 /* Test early for possible overrun. */
4057 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4058 goto invalid_param_len;
4059
4060 p = page_address(sg_page(scsi_sglist(scmd)));
4061
4062 /* Move past header and block descriptors. */
4063 if (len < hdr_len)
4064 goto invalid_param_len;
4065
4066 if (six_byte)
4067 bd_len = p[3];
4068 else
4069 bd_len = (p[6] << 8) + p[7];
4070
4071 len -= hdr_len;
4072 p += hdr_len;
4073 if (len < bd_len)
4074 goto invalid_param_len;
7780081c
HR		 4075 if (bd_len != 0 && bd_len != 8) {
4076 fp = (six_byte) ? 3 : 6;
4077 fp += bd_len + hdr_len;
1b26d29c 4078 goto invalid_param;
7780081c 4079 }
1b26d29c
PB		 4080
4081 len -= bd_len;
4082 p += bd_len;
4083 if (len == 0)
4084 goto skip;
4085
4086 /* Parse both possible formats for the mode page headers. */
4087 pg = p[0] & 0x3f;
4088 if (p[0] & 0x40) {
4089 if (len < 4)
4090 goto invalid_param_len;
4091
4092 spg = p[1];
4093 pg_len = (p[2] << 8) | p[3];
4094 p += 4;
4095 len -= 4;
4096 } else {
4097 if (len < 2)
4098 goto invalid_param_len;
4099
4100 spg = 0;
4101 pg_len = p[1];
4102 p += 2;
4103 len -= 2;
4104 }
4105
4106 /*
4107 * No mode subpages supported (yet) but asking for _all_
4108 * subpages may be valid
4109 */
7780081c
HR		 4110 if (spg && (spg != ALL_SUB_MPAGES)) {
4111 fp = (p[0] & 0x40) ? 1 : 0;
4112 fp += hdr_len + bd_len;
1b26d29c 4113 goto invalid_param;
7780081c 4114 }
1b26d29c
PB		 4115 if (pg_len > len)
4116 goto invalid_param_len;
4117
4118 switch (pg) {
4119 case CACHE_MPAGE:
7780081c
HR		 4120 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4121 fp += hdr_len + bd_len;
1b26d29c 4122 goto invalid_param;
7780081c 4123 }
1b26d29c 4124 break;
06dbde5f 4125 case CONTROL_MPAGE:
7780081c
HR		 4126 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4127 fp += hdr_len + bd_len;
06dbde5f 4128 goto invalid_param;
535fd072
TY		 4129 } else {
4130 goto skip; /* No ATA command to send */
7780081c 4131 }
1b26d29c 4132 break;
1b26d29c 4133 default: /* invalid page code */
7780081c 4134 fp = bd_len + hdr_len;
1b26d29c
PB		 4135 goto invalid_param;
4136 }
4137
4138 /*
4139 * Only one page has changeable data, so we only support setting one
4140 * page at a time.
4141 */
4142 if (len > pg_len)
4143 goto invalid_param;
4144
4145 return 0;
4146
4147 invalid_fld:
0df10b84 4148 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1b26d29c
PB		 4149 return 1;
4150
4151 invalid_param:
7780081c 4152 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
1b26d29c
PB		 4153 return 1;
4154
4155 invalid_param_len:
4156 /* "Parameter list length error" */
06dbde5f 4157 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
1b26d29c
PB		 4158 return 1;
4159
4160 skip:
4161 scmd->result = SAM_STAT_GOOD;
4162 return 1;
4163}
4164
1da177e4
LT		 4165/**
4166 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4167 * @dev: ATA device
4168 * @cmd: SCSI command opcode to consider
4169 *
4170 * Look up the SCSI command given, and determine whether the
4171 * SCSI command is to be translated or simulated.
4172 *
4173 * RETURNS:
4174 * Pointer to translation function if possible, %NULL if not.
4175 */
4176
4177static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4178{
4179 switch (cmd) {
4180 case READ_6:
4181 case READ_10:
4182 case READ_16:
4183
4184 case WRITE_6:
4185 case WRITE_10:
4186 case WRITE_16:
4187 return ata_scsi_rw_xlat;
4188
0cdd6eb7 4189 case WRITE_SAME_16:
18f0f978
CH		 4190 return ata_scsi_write_same_xlat;
4191
1da177e4
LT		 4192 case SYNCHRONIZE_CACHE:
4193 if (ata_try_flush_cache(dev))
4194 return ata_scsi_flush_xlat;
4195 break;
4196
4197 case VERIFY:
4198 case VERIFY_16:
4199 return ata_scsi_verify_xlat;
b095518e
JG		 4200
4201 case ATA_12:
4202 case ATA_16:
4203 return ata_scsi_pass_thru;
da61396d 4204
1b26d29c
PB		 4205 case MODE_SELECT:
4206 case MODE_SELECT_10:
4207 return ata_scsi_mode_select_xlat;
4208 break;
4209
28a3fc22
HR		 4210 case ZBC_IN:
4211 return ata_scsi_zbc_in_xlat;
4212
27708a95
HR		 4213 case ZBC_OUT:
4214 return ata_scsi_zbc_out_xlat;
4215
972dcafb
DG		 4216 case START_STOP:
4217 return ata_scsi_start_stop_xlat;
1da177e4
LT		 4218 }
4219
4220 return NULL;
4221}
4222
4223/**
4224 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4225 * @ap: ATA port to which the command was being sent
4226 * @cmd: SCSI command to dump
4227 *
4228 * Prints the contents of a SCSI command via printk().
4229 */
4230
4231static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4232 struct scsi_cmnd *cmd)
4233{
4234#ifdef ATA_DEBUG
4235 struct scsi_device *scsidev = cmd->device;
1da177e4 4236
26f58830 4237 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
44877b4e 4238 ap->print_id,
1da177e4 4239 scsidev->channel, scsidev->id, scsidev->lun,
26f58830 4240 cmd->cmnd);
1da177e4
LT		 4241#endif
4242}
4243
542b1444 4244static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 4245 struct ata_device *dev)
eb3f0f9c 4246{
baf4fdfa
ML		 4247 u8 scsi_op = scmd->cmnd[0];
4248 ata_xlat_func_t xlat_func;
2115ea94
TH		 4249 int rc = 0;
4250
9162c657 4251 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
baf4fdfa
ML		 4252 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4253 goto bad_cdb_len;
eb3f0f9c 4254
baf4fdfa
ML		 4255 xlat_func = ata_get_xlat_func(dev, scsi_op);
4256 } else {
4257 if (unlikely(!scmd->cmd_len))
4258 goto bad_cdb_len;
4259
4260 xlat_func = NULL;
4261 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4262 /* relay SCSI command to ATAPI device */
607126c2
ML		 4263 int len = COMMAND_SIZE(scsi_op);
4264 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 4265 goto bad_cdb_len;
4266
4267 xlat_func = atapi_xlat;
4268 } else {
4269 /* ATA_16 passthru, treat as an ATA command */
4270 if (unlikely(scmd->cmd_len > 16))
4271 goto bad_cdb_len;
4272
4273 xlat_func = ata_get_xlat_func(dev, scsi_op);
4274 }
4275 }
4276
4277 if (xlat_func)
b27dcfb0 4278 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 4279 else
b27dcfb0 4280 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 4281
4282 return rc;
baf4fdfa
ML		 4283
4284 bad_cdb_len:
4285 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4286 scmd->cmd_len, scsi_op, dev->cdb_len);
4287 scmd->result = DID_ERROR << 16;
b27dcfb0 4288 scmd->scsi_done(scmd);
baf4fdfa 4289 return 0;
eb3f0f9c
BK		 4290}
4291
1da177e4
LT		 4292/**
4293 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 4294 * @shost: SCSI host of command to be sent
1da177e4 4295 * @cmd: SCSI command to be sent
1da177e4
LT		 4296 *
4297 * In some cases, this function translates SCSI commands into
4298 * ATA taskfiles, and queues the taskfiles to be sent to
4299 * hardware. In other cases, this function simulates a
4300 * SCSI device by evaluating and responding to certain
4301 * SCSI commands. This creates the overall effect of
4302 * ATA and ATAPI devices appearing as SCSI devices.
4303 *
4304 * LOCKING:
23e701e6 4305 * ATA host lock
1da177e4
LT		 4306 *
4307 * RETURNS:
2115ea94
TH		 4308 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4309 * 0 otherwise.
1da177e4 4310 */
23e701e6 4311int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 4312{
4313 struct ata_port *ap;
4314 struct ata_device *dev;
4315 struct scsi_device *scsidev = cmd->device;
2115ea94 4316 int rc = 0;
23e701e6 4317 unsigned long irq_flags;
1da177e4 4318
35bb94b1 4319 ap = ata_shost_to_port(shost);
005a5a06 4320
23e701e6 4321 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 4322
4323 ata_scsi_dump_cdb(ap, cmd);
4324
4325 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 4326 if (likely(dev))
b27dcfb0 4327 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 4328 else {
1da177e4 4329 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 4330 cmd->scsi_done(cmd);
1da177e4
LT		 4331 }
4332
23e701e6
JG		 4333 spin_unlock_irqrestore(ap->lock, irq_flags);
4334
2115ea94 4335 return rc;
1da177e4
LT		 4336}
4337
4338/**
4339 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 4340 * @dev: the target device
1da177e4 4341 * @cmd: SCSI command being sent to device.
1da177e4
LT		 4342 *
4343 * Interprets and directly executes a select list of SCSI commands
4344 * that can be handled internally.
4345 *
4346 * LOCKING:
cca3974e 4347 * spin_lock_irqsave(host lock)
1da177e4
LT		 4348 */
4349
b27dcfb0 4350void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 4351{
4352 struct ata_scsi_args args;
057ace5e 4353 const u8 *scsicmd = cmd->cmnd;
45394145 4354 u8 tmp8;
1da177e4 4355
9a3dccc4
TH		 4356 args.dev = dev;
4357 args.id = dev->id;
1da177e4 4358 args.cmd = cmd;
1da177e4
LT		 4359
4360 switch(scsicmd[0]) {
2dcb407e 4361 case INQUIRY:
bcfc867d
HR		 4362 if (scsicmd[1] & 2) /* is CmdDt set? */
4363 ata_scsi_invalid_field(dev, cmd, 1);
2dcb407e
JG		 4364 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4365 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4366 else switch (scsicmd[2]) {
4367 case 0x00:
4368 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 4369 break;
2dcb407e
JG		 4370 case 0x80:
4371 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 4372 break;
2dcb407e
JG		 4373 case 0x83:
4374 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 4375 break;
2dcb407e
JG		 4376 case 0x89:
4377 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4378 break;
18f0f978
CH		 4379 case 0xb0:
4380 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4381 break;
1e9dbc92
MW		 4382 case 0xb1:
4383 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4384 break;
02e0a604
MP		 4385 case 0xb2:
4386 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4387 break;
6d1003ae
HR		 4388 case 0xb6:
4389 if (dev->flags & ATA_DFLAG_ZAC) {
4390 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4391 break;
4392 }
4393 /* Fallthrough */
2dcb407e 4394 default:
bcfc867d 4395 ata_scsi_invalid_field(dev, cmd, 2);
1da177e4 4396 break;
2dcb407e
JG		 4397 }
4398 break;
4399
4400 case MODE_SENSE:
4401 case MODE_SENSE_10:
4402 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4403 break;
4404
2dcb407e
JG		 4405 case READ_CAPACITY:
4406 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4407 break;
4408
eb846d9f 4409 case SERVICE_ACTION_IN_16:
2dcb407e 4410 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 4411 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 4412 else
bcfc867d 4413 ata_scsi_invalid_field(dev, cmd, 1);
2dcb407e 4414 break;
1da177e4 4415
2dcb407e
JG		 4416 case REPORT_LUNS:
4417 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4418 break;
1da177e4 4419
2dcb407e 4420 case REQUEST_SENSE:
06dbde5f 4421 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
2dcb407e 4422 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 4423 cmd->scsi_done(cmd);
2dcb407e 4424 break;
1da177e4 4425
2dcb407e
JG		 4426 /* if we reach this, then writeback caching is disabled,
4427 * turning this into a no-op.
4428 */
4429 case SYNCHRONIZE_CACHE:
4430 /* fall through */
4431
4432 /* no-op's, complete with success */
4433 case REZERO_UNIT:
4434 case SEEK_6:
4435 case SEEK_10:
4436 case TEST_UNIT_READY:
4437 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4438 break;
45394145 4439
2dcb407e
JG		 4440 case SEND_DIAGNOSTIC:
4441 tmp8 = scsicmd[1] & ~(1 << 3);
4442 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 4443 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 4444 else
bcfc867d 4445 ata_scsi_invalid_field(dev, cmd, 1);
2dcb407e 4446 break;
1da177e4 4447
7b203094
ST		 4448 case MAINTENANCE_IN:
4449 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4450 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4451 else
4452 ata_scsi_invalid_field(dev, cmd, 1);
4453 break;
4454
2dcb407e
JG		 4455 /* all other commands */
4456 default:
06dbde5f 4457 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2dcb407e 4458 /* "Invalid command operation code" */
b27dcfb0 4459 cmd->scsi_done(cmd);
2dcb407e 4460 break;
1da177e4
LT		 4461 }
4462}
4463
f3187195
TH		 4464int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4465{
4466 int i, rc;
4467
4468 for (i = 0; i < host->n_ports; i++) {
4469 struct ata_port *ap = host->ports[i];
4470 struct Scsi_Host *shost;
4471
4472 rc = -ENOMEM;
4473 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4474 if (!shost)
4475 goto err_alloc;
4476
9ee4f393 4477 shost->eh_noresume = 1;
f3187195
TH		 4478 *(struct ata_port **)&shost->hostdata[0] = ap;
4479 ap->scsi_host = shost;
4480
d9027470 4481 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 4482 shost->unique_id = ap->print_id;
4483 shost->max_id = 16;
4484 shost->max_lun = 1;
4485 shost->max_channel = 1;
4486 shost->max_cmd_len = 16;
4487
31cc23b3
TH		 4488 /* Schedule policy is determined by ->qc_defer()
4489 * callback and it needs to see every deferred qc.
4490 * Set host_blocked to 1 to prevent SCSI midlayer from
4491 * automatically deferring requests.
4492 */
4493 shost->max_host_blocked = 1;
4494
f8fc75dc
LM		 4495 rc = scsi_add_host_with_dma(ap->scsi_host,
4496 &ap->tdev, ap->host->dev);
f3187195
TH		 4497 if (rc)
4498 goto err_add;
4499 }
4500
4501 return 0;
4502
4503 err_add:
4504 scsi_host_put(host->ports[i]->scsi_host);
4505 err_alloc:
4506 while (--i >= 0) {
4507 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4508
4509 scsi_remove_host(shost);
4510 scsi_host_put(shost);
4511 }
4512 return rc;
4513}
4514
1ae46317 4515void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 4516{
1ae46317
TH		 4517 int tries = 5;
4518 struct ata_device *last_failed_dev = NULL;
41bda9c9 4519 struct ata_link *link;
1ae46317 4520 struct ata_device *dev;
644dd0cc 4521
1ae46317 4522 repeat:
1eca4365
TH		 4523 ata_for_each_link(link, ap, EDGE) {
4524 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 4525 struct scsi_device *sdev;
4526 int channel = 0, id = 0;
3edebac4 4527
1eca4365 4528 if (dev->sdev)
41bda9c9 4529 continue;
3f19ee8c 4530
41bda9c9
TH		 4531 if (ata_is_host_link(link))
4532 id = dev->devno;
4533 else
4534 channel = link->pmp;
4535
4536 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4537 NULL);
4538 if (!IS_ERR(sdev)) {
4539 dev->sdev = sdev;
4540 scsi_device_put(sdev);
295124dc
GG		 4541 } else {
4542 dev->sdev = NULL;
41bda9c9 4543 }
3edebac4 4544 }
3f19ee8c 4545 }
1ae46317
TH		 4546
4547 /* If we scanned while EH was in progress or allocation
4548 * failure occurred, scan would have failed silently. Check
4549 * whether all devices are attached.
4550 */
1eca4365
TH		 4551 ata_for_each_link(link, ap, EDGE) {
4552 ata_for_each_dev(dev, link, ENABLED) {
4553 if (!dev->sdev)
41bda9c9
TH		 4554 goto exit_loop;
4555 }
1ae46317 4556 }
41bda9c9
TH		 4557 exit_loop:
4558 if (!link)
1ae46317
TH		 4559 return;
4560
4561 /* we're missing some SCSI devices */
4562 if (sync) {
4563 /* If caller requested synchrnous scan && we've made
4564 * any progress, sleep briefly and repeat.
4565 */
4566 if (dev != last_failed_dev) {
4567 msleep(100);
4568 last_failed_dev = dev;
4569 goto repeat;
4570 }
4571
4572 /* We might be failing to detect boot device, give it
4573 * a few more chances.
4574 */
4575 if (--tries) {
4576 msleep(100);
4577 goto repeat;
4578 }
4579
a9a79dfe
JP		 4580 ata_port_err(ap,
4581 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 4582 }
4583
ad72cf98 4584 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 4585 round_jiffies_relative(HZ));
644dd0cc 4586}
0ea035a3
TH		 4587
4588/**
4589 * ata_scsi_offline_dev - offline attached SCSI device
4590 * @dev: ATA device to offline attached SCSI device for
4591 *
4592 * This function is called from ata_eh_hotplug() and responsible
4593 * for taking the SCSI device attached to @dev offline. This
cca3974e 4594 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 4595 * against clearing.
4596 *
4597 * LOCKING:
cca3974e 4598 * spin_lock_irqsave(host lock)
0ea035a3
TH		 4599 *
4600 * RETURNS:
4601 * 1 if attached SCSI device exists, 0 otherwise.
4602 */
4603int ata_scsi_offline_dev(struct ata_device *dev)
4604{
4605 if (dev->sdev) {
4606 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4607 return 1;
4608 }
4609 return 0;
4610}
580b2102
TH		 4611
4612/**
4613 * ata_scsi_remove_dev - remove attached SCSI device
4614 * @dev: ATA device to remove attached SCSI device for
4615 *
4616 * This function is called from ata_eh_scsi_hotplug() and
4617 * responsible for removing the SCSI device attached to @dev.
4618 *
4619 * LOCKING:
4620 * Kernel thread context (may sleep).
4621 */
4622static void ata_scsi_remove_dev(struct ata_device *dev)
4623{
9af5c9c9 4624 struct ata_port *ap = dev->link->ap;
580b2102
TH		 4625 struct scsi_device *sdev;
4626 unsigned long flags;
4627
4628 /* Alas, we need to grab scan_mutex to ensure SCSI device
4629 * state doesn't change underneath us and thus
4630 * scsi_device_get() always succeeds. The mutex locking can
4631 * be removed if there is __scsi_device_get() interface which
4632 * increments reference counts regardless of device state.
4633 */
cca3974e 4634 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 4635 spin_lock_irqsave(ap->lock, flags);
580b2102 4636
cca3974e 4637 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 4638 sdev = dev->sdev;
4639 dev->sdev = NULL;
4640
4641 if (sdev) {
4642 /* If user initiated unplug races with us, sdev can go
cca3974e 4643 * away underneath us after the host lock and
580b2102
TH		 4644 * scan_mutex are released. Hold onto it.
4645 */
4646 if (scsi_device_get(sdev) == 0) {
4647 /* The following ensures the attached sdev is
4648 * offline on return from ata_scsi_offline_dev()
4649 * regardless it wins or loses the race
4650 * against this function.
4651 */
4652 scsi_device_set_state(sdev, SDEV_OFFLINE);
4653 } else {
4654 WARN_ON(1);
4655 sdev = NULL;
4656 }
4657 }
4658
ba6a1308 4659 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 4660 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 4661
4662 if (sdev) {
a9a79dfe
JP		 4663 ata_dev_info(dev, "detaching (SCSI %s)\n",
4664 dev_name(&sdev->sdev_gendev));
580b2102
TH		 4665
4666 scsi_remove_device(sdev);
4667 scsi_device_put(sdev);
4668 }
4669}
4670
41bda9c9
TH		 4671static void ata_scsi_handle_link_detach(struct ata_link *link)
4672{
4673 struct ata_port *ap = link->ap;
4674 struct ata_device *dev;
4675
1eca4365 4676 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 4677 unsigned long flags;
4678
4679 if (!(dev->flags & ATA_DFLAG_DETACHED))
4680 continue;
4681
4682 spin_lock_irqsave(ap->lock, flags);
4683 dev->flags &= ~ATA_DFLAG_DETACHED;
4684 spin_unlock_irqrestore(ap->lock, flags);
4685
f1bc1e4c
AL		 4686 if (zpodd_dev_enabled(dev))
4687 zpodd_exit(dev);
4688
41bda9c9
TH		 4689 ata_scsi_remove_dev(dev);
4690 }
4691}
4692
2f294968
KCA		 4693/**
4694 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 4695 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 4696 *
4697 * Tell the block layer to send a media change notification
4698 * event.
4699 *
4700 * LOCKING:
854c73a2 4701 * spin_lock_irqsave(host lock)
2f294968 4702 */
854c73a2 4703void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 4704{
854c73a2 4705 if (dev->sdev)
f26792d5
JG		 4706 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4707 GFP_ATOMIC);
2f294968 4708}
2f294968 4709
580b2102
TH		 4710/**
4711 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 4712 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 4713 *
4714 * Perform SCSI part of hotplug. It's executed from a separate
4715 * workqueue after EH completes. This is necessary because SCSI
4716 * hot plugging requires working EH and hot unplugging is
4717 * synchronized with hot plugging with a mutex.
4718 *
4719 * LOCKING:
4720 * Kernel thread context (may sleep).
4721 */
65f27f38 4722void ata_scsi_hotplug(struct work_struct *work)
580b2102 4723{
65f27f38
DH		 4724 struct ata_port *ap =
4725 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 4726 int i;
580b2102 4727
b51e9e5d 4728 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 4729 DPRINTK("ENTER/EXIT - unloading\n");
4730 return;
4731 }
4732
85fbd722
TH		 4733 /*
4734 * XXX - UGLY HACK
4735 *
4736 * The block layer suspend/resume path is fundamentally broken due
4737 * to freezable kthreads and workqueue and may deadlock if a block
4738 * device gets removed while resume is in progress. I don't know
4739 * what the solution is short of removing freezable kthreads and
4740 * workqueues altogether.
4741 *
4742 * The following is an ugly hack to avoid kicking off device
4743 * removal while freezer is active. This is a joke but does avoid
4744 * this particular deadlock scenario.
4745 *
4746 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4747 * http://marc.info/?l=linux-kernel&m=138695698516487
4748 */
4749#ifdef CONFIG_FREEZER
4750 while (pm_freezing)
4751 msleep(10);
4752#endif
4753
580b2102 4754 DPRINTK("ENTER\n");
ad72cf98 4755 mutex_lock(&ap->scsi_scan_mutex);
580b2102 4756
41bda9c9
TH		 4757 /* Unplug detached devices. We cannot use link iterator here
4758 * because PMP links have to be scanned even if PMP is
4759 * currently not attached. Iterate manually.
4760 */
4761 ata_scsi_handle_link_detach(&ap->link);
4762 if (ap->pmp_link)
4763 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4764 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 4765
4766 /* scan for new ones */
1ae46317 4767 ata_scsi_scan_host(ap, 0);
580b2102 4768
ad72cf98 4769 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 4770 DPRINTK("EXIT\n");
4771}
83c47bcb
TH		 4772
4773/**
4774 * ata_scsi_user_scan - indication for user-initiated bus scan
4775 * @shost: SCSI host to scan
4776 * @channel: Channel to scan
4777 * @id: ID to scan
4778 * @lun: LUN to scan
4779 *
4780 * This function is called when user explicitly requests bus
4781 * scan. Set probe pending flag and invoke EH.
4782 *
4783 * LOCKING:
4784 * SCSI layer (we don't care)
4785 *
4786 * RETURNS:
4787 * Zero.
4788 */
d9027470 4789int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
9cb78c16 4790 unsigned int id, u64 lun)
83c47bcb
TH		 4791{
4792 struct ata_port *ap = ata_shost_to_port(shost);
4793 unsigned long flags;
41bda9c9 4794 int devno, rc = 0;
83c47bcb
TH		 4795
4796 if (!ap->ops->error_handler)
4797 return -EOPNOTSUPP;
4798
41bda9c9 4799 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 4800 return -EINVAL;
4801
071f44b1 4802 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 4803 if (channel != SCAN_WILD_CARD && channel)
4804 return -EINVAL;
4805 devno = id;
4806 } else {
4807 if (id != SCAN_WILD_CARD && id)
4808 return -EINVAL;
4809 devno = channel;
4810 }
4811
ba6a1308 4812 spin_lock_irqsave(ap->lock, flags);
83c47bcb 4813
41bda9c9
TH		 4814 if (devno == SCAN_WILD_CARD) {
4815 struct ata_link *link;
4816
1eca4365 4817 ata_for_each_link(link, ap, EDGE) {
41bda9c9 4818 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 4819 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 4820 ehi->action |= ATA_EH_RESET;
41bda9c9 4821 }
83c47bcb 4822 } else {
41bda9c9 4823 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 4824
4825 if (dev) {
41bda9c9 4826 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 4827 ehi->probe_mask |= 1 << dev->devno;
cf480626 4828 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 4829 } else
4830 rc = -EINVAL;
4831 }
4832
309afcb5 4833 if (rc == 0) {
83c47bcb 4834 ata_port_schedule_eh(ap);
309afcb5
TH		 4835 spin_unlock_irqrestore(ap->lock, flags);
4836 ata_port_wait_eh(ap);
4837 } else
4838 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 4839
4840 return rc;
4841}
3057ac3c 4842
4843/**
d0171269 4844 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 4845 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 4846 *
d0171269 4847 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 4848 * libata need to propagate the changes to SCSI layer.
3057ac3c 4849 *
d0171269
TH		 4850 * LOCKING:
4851 * Kernel thread context (may sleep).
3057ac3c 4852 */
65f27f38 4853void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 4854{
65f27f38
DH		 4855 struct ata_port *ap =
4856 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 4857 struct ata_link *link;
f58229f8 4858 struct ata_device *dev;
f84e7e41 4859 unsigned long flags;
3057ac3c 4860
ad72cf98 4861 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 4862 spin_lock_irqsave(ap->lock, flags);
4863
1eca4365
TH		 4864 ata_for_each_link(link, ap, EDGE) {
4865 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 4866 struct scsi_device *sdev = dev->sdev;
3057ac3c 4867
1eca4365 4868 if (!sdev)
41bda9c9
TH		 4869 continue;
4870 if (scsi_device_get(sdev))
4871 continue;
f84e7e41 4872
41bda9c9
TH		 4873 spin_unlock_irqrestore(ap->lock, flags);
4874 scsi_rescan_device(&(sdev->sdev_gendev));
4875 scsi_device_put(sdev);
4876 spin_lock_irqsave(ap->lock, flags);
4877 }
3057ac3c 4878 }
f84e7e41
TH		 4879
4880 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 4881 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 4882}
80289167
BK		 4883
4884/**
4885 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 4886 * @host: ATA host container for all SAS ports
80289167 4887 * @port_info: Information from low-level host driver
cca3974e 4888 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 4889 *
4890 * LOCKING:
4891 * PCI/etc. bus probe sem.
4892 *
4893 * RETURNS:
4894 * ata_port pointer on success / NULL on failure.
4895 */
4896
cca3974e 4897struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 4898 struct ata_port_info *port_info,
cca3974e 4899 struct Scsi_Host *shost)
80289167 4900{
f3187195 4901 struct ata_port *ap;
80289167 4902
f3187195 4903 ap = ata_port_alloc(host);
80289167
BK		 4904 if (!ap)
4905 return NULL;
4906
f3187195 4907 ap->port_no = 0;
a29b5dad 4908 ap->lock = &host->lock;
f3187195
TH		 4909 ap->pio_mask = port_info->pio_mask;
4910 ap->mwdma_mask = port_info->mwdma_mask;
4911 ap->udma_mask = port_info->udma_mask;
4912 ap->flags |= port_info->flags;
4913 ap->ops = port_info->port_ops;
4914 ap->cbl = ATA_CBL_SATA;
4915
80289167
BK		 4916 return ap;
4917}
4918EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4919
4920/**
4921 * ata_sas_port_start - Set port up for dma.
4922 * @ap: Port to initialize
4923 *
4924 * Called just after data structures for each port are
dde20207 4925 * initialized.
80289167
BK		 4926 *
4927 * May be used as the port_start() entry in ata_port_operations.
4928 *
4929 * LOCKING:
4930 * Inherited from caller.
4931 */
4932int ata_sas_port_start(struct ata_port *ap)
4933{
3f1e046a
NA		 4934 /*
4935 * the port is marked as frozen at allocation time, but if we don't
4936 * have new eh, we won't thaw it
4937 */
4938 if (!ap->ops->error_handler)
4939 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 4940 return 0;
80289167
BK		 4941}
4942EXPORT_SYMBOL_GPL(ata_sas_port_start);
4943
4944/**
4945 * ata_port_stop - Undo ata_sas_port_start()
4946 * @ap: Port to shut down
4947 *
80289167
BK		 4948 * May be used as the port_stop() entry in ata_port_operations.
4949 *
4950 * LOCKING:
4951 * Inherited from caller.
4952 */
4953
4954void ata_sas_port_stop(struct ata_port *ap)
4955{
80289167
BK		 4956}
4957EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4958
b2024459
DW		 4959/**
4960 * ata_sas_async_probe - simply schedule probing and return
4961 * @ap: Port to probe
4962 *
4963 * For batch scheduling of probe for sas attached ata devices, assumes
4964 * the port has already been through ata_sas_port_init()
4965 */
4966void ata_sas_async_probe(struct ata_port *ap)
9508a66f 4967{
b2024459
DW		 4968 __ata_port_probe(ap);
4969}
4970EXPORT_SYMBOL_GPL(ata_sas_async_probe);
9508a66f 4971
b2024459
DW		 4972int ata_sas_sync_probe(struct ata_port *ap)
4973{
4974 return ata_port_probe(ap);
9508a66f 4975}
b2024459
DW		 4976EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4977
9508a66f 4978
80289167
BK		 4979/**
4980 * ata_sas_port_init - Initialize a SATA device
4981 * @ap: SATA port to initialize
4982 *
4983 * LOCKING:
4984 * PCI/etc. bus probe sem.
4985 *
4986 * RETURNS:
4987 * Zero on success, non-zero on error.
4988 */
4989
4990int ata_sas_port_init(struct ata_port *ap)
4991{
4992 int rc = ap->ops->port_start(ap);
4993
b2024459
DW		 4994 if (rc)
4995 return rc;
4996 ap->print_id = atomic_inc_return(&ata_print_id);
4997 return 0;
80289167
BK		 4998}
4999EXPORT_SYMBOL_GPL(ata_sas_port_init);
5000
5001/**
5002 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5003 * @ap: SATA port to destroy
5004 *
5005 */
5006
5007void ata_sas_port_destroy(struct ata_port *ap)
5008{
f0d36efd
TH		 5009 if (ap->ops->port_stop)
5010 ap->ops->port_stop(ap);
80289167
BK		 5011 kfree(ap);
5012}
5013EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5014
5015/**
5016 * ata_sas_slave_configure - Default slave_config routine for libata devices
5017 * @sdev: SCSI device to configure
5018 * @ap: ATA port to which SCSI device is attached
5019 *
5020 * RETURNS:
5021 * Zero.
5022 */
5023
5024int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5025{
5026 ata_scsi_sdev_config(sdev);
9af5c9c9 5027 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 5028 return 0;
5029}
5030EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5031
5032/**
5033 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5034 * @cmd: SCSI command to be sent
80289167
BK		 5035 * @ap: ATA port to which the command is being sent
5036 *
5037 * RETURNS:
08475a19
BK		 5038 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5039 * 0 otherwise.
80289167
BK		 5040 */
5041
b27dcfb0 5042int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 5043{
08475a19
BK		 5044 int rc = 0;
5045
80289167
BK		 5046 ata_scsi_dump_cdb(ap, cmd);
5047
2486fa56 5048 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 5049 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 5050 else {
5051 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 5052 cmd->scsi_done(cmd);
80289167 5053 }
08475a19 5054 return rc;
80289167
BK		 5055}
5056EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
98bd4be1
SL		 5057
5058int ata_sas_allocate_tag(struct ata_port *ap)
5059{
5060 unsigned int max_queue = ap->host->n_tags;
5061 unsigned int i, tag;
5062
5063 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
3a028243 5064 tag = tag < max_queue ? tag : 0;
98bd4be1
SL		 5065
5066 /* the last tag is reserved for internal command. */
5067 if (tag == ATA_TAG_INTERNAL)
5068 continue;
5069
5070 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5071 ap->sas_last_tag = tag;
5072 return tag;
5073 }
5074 }
5075 return -1;
5076}
5077
5078void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5079{
5080 clear_bit(tag, &ap->sas_tag_allocated);
5081}
Linux 6.x block layer and io_uring tree(s)