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libata: fixup ZAC device disabling
[deliverable/linux.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>
1da177e4
LT		 53
54#include "libata.h"
d9027470 55#include "libata-transport.h"
1da177e4 56
87340e98
TH		 57#define ATA_SCSI_RBUF_SIZE 4096
58
59static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 61
ad706991 62typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 63
2dcb407e 64static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 65 const struct scsi_device *scsidev);
2dcb407e 66static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 67 const struct scsi_device *scsidev);
1da177e4 68
00ac37f5
DG		 69#define RW_RECOVERY_MPAGE 0x1
70#define RW_RECOVERY_MPAGE_LEN 12
71#define CACHE_MPAGE 0x8
72#define CACHE_MPAGE_LEN 20
73#define CONTROL_MPAGE 0xa
74#define CONTROL_MPAGE_LEN 12
75#define ALL_MPAGES 0x3f
76#define ALL_SUB_MPAGES 0xff
77
78
24f75686 79static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 80 RW_RECOVERY_MPAGE,
81 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 82 (1 << 7), /* AWRE */
00ac37f5
DG		 83 0, /* read retry count */
84 0, 0, 0, 0,
85 0, /* write retry count */
86 0, 0, 0
87};
88
89static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
90 CACHE_MPAGE,
91 CACHE_MPAGE_LEN - 2,
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0
96};
97
98static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE,
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
105};
106
c93b263e
TH		 107static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
ca77329f
KCA		 112};
113
ecd75ad5 114static ssize_t ata_scsi_lpm_store(struct device *device,
c93b263e
TH		 115 struct device_attribute *attr,
116 const char *buf, size_t count)
ca77329f 117{
ecd75ad5 118 struct Scsi_Host *shost = class_to_shost(device);
ca77329f 119 struct ata_port *ap = ata_shost_to_port(shost);
ecd75ad5
TH		 120 struct ata_link *link;
121 struct ata_device *dev;
c93b263e 122 enum ata_lpm_policy policy;
6b7ae954 123 unsigned long flags;
c93b263e
TH		 124
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy = ATA_LPM_MAX_POWER;
127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
128 const char *name = ata_lpm_policy_names[policy];
129
130 if (strncmp(name, buf, strlen(name)) == 0)
ca77329f 131 break;
ca77329f 132 }
c93b263e 133 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 134 return -EINVAL;
135
6b7ae954 136 spin_lock_irqsave(ap->lock, flags);
ecd75ad5
TH		 137
138 ata_for_each_link(link, ap, EDGE) {
139 ata_for_each_dev(dev, &ap->link, ENABLED) {
140 if (dev->horkage & ATA_HORKAGE_NOLPM) {
141 count = -EOPNOTSUPP;
142 goto out_unlock;
143 }
144 }
145 }
146
6b7ae954
TH		 147 ap->target_lpm_policy = policy;
148 ata_port_schedule_eh(ap);
ecd75ad5 149out_unlock:
6b7ae954 150 spin_unlock_irqrestore(ap->lock, flags);
ca77329f
KCA		 151 return count;
152}
153
c93b263e
TH		 154static ssize_t ata_scsi_lpm_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
ca77329f 156{
ee959b00 157 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 158 struct ata_port *ap = ata_shost_to_port(shost);
ca77329f 159
6b7ae954 160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 161 return -EINVAL;
162
c93b263e 163 return snprintf(buf, PAGE_SIZE, "%s\n",
6b7ae954 164 ata_lpm_policy_names[ap->target_lpm_policy]);
ca77329f 165}
ee959b00 166DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
c93b263e 167 ata_scsi_lpm_show, ata_scsi_lpm_store);
ee959b00 168EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 169
45fabbb7
EO		 170static ssize_t ata_scsi_park_show(struct device *device,
171 struct device_attribute *attr, char *buf)
172{
173 struct scsi_device *sdev = to_scsi_device(device);
174 struct ata_port *ap;
175 struct ata_link *link;
176 struct ata_device *dev;
3948b6f2 177 unsigned long now;
45fabbb7
EO		 178 unsigned int uninitialized_var(msecs);
179 int rc = 0;
180
181 ap = ata_shost_to_port(sdev->host);
182
3948b6f2 183 spin_lock_irq(ap->lock);
45fabbb7
EO		 184 dev = ata_scsi_find_dev(ap, sdev);
185 if (!dev) {
186 rc = -ENODEV;
187 goto unlock;
188 }
189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
190 rc = -EOPNOTSUPP;
191 goto unlock;
192 }
193
194 link = dev->link;
a464189d 195 now = jiffies;
45fabbb7
EO		 196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
197 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 198 time_after(dev->unpark_deadline, now))
199 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 200 else
201 msecs = 0;
202
203unlock:
204 spin_unlock_irq(ap->lock);
205
206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
207}
208
209static ssize_t ata_scsi_park_store(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t len)
212{
213 struct scsi_device *sdev = to_scsi_device(device);
214 struct ata_port *ap;
215 struct ata_device *dev;
216 long int input;
217 unsigned long flags;
218 int rc;
219
42b9ab7a
JH		 220 rc = kstrtol(buf, 10, &input);
221 if (rc)
222 return rc;
223 if (input < -2)
45fabbb7
EO		 224 return -EINVAL;
225 if (input > ATA_TMOUT_MAX_PARK) {
226 rc = -EOVERFLOW;
227 input = ATA_TMOUT_MAX_PARK;
228 }
229
230 ap = ata_shost_to_port(sdev->host);
231
232 spin_lock_irqsave(ap->lock, flags);
233 dev = ata_scsi_find_dev(ap, sdev);
234 if (unlikely(!dev)) {
235 rc = -ENODEV;
236 goto unlock;
237 }
9162c657
HR		 238 if (dev->class != ATA_DEV_ATA &&
239 dev->class != ATA_DEV_ZAC) {
45fabbb7
EO		 240 rc = -EOPNOTSUPP;
241 goto unlock;
242 }
243
244 if (input >= 0) {
245 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
246 rc = -EOPNOTSUPP;
247 goto unlock;
248 }
249
250 dev->unpark_deadline = ata_deadline(jiffies, input);
251 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
252 ata_port_schedule_eh(ap);
253 complete(&ap->park_req_pending);
254 } else {
255 switch (input) {
256 case -1:
257 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
258 break;
259 case -2:
260 dev->flags |= ATA_DFLAG_NO_UNLOAD;
261 break;
262 }
263 }
264unlock:
265 spin_unlock_irqrestore(ap->lock, flags);
266
267 return rc ? rc : len;
268}
269DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
270 ata_scsi_park_show, ata_scsi_park_store);
271EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
272
06dbde5f
HR		 273void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
274 u8 sk, u8 asc, u8 ascq)
f0761be3 275{
06dbde5f
HR		 276 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
277
5b01e4b9
HR		 278 if (!cmd)
279 return;
280
f0761be3
TH		 281 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
282
06dbde5f 283 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
f0761be3
TH		 284}
285
492bf621
HR		 286void ata_scsi_set_sense_information(struct ata_device *dev,
287 struct scsi_cmnd *cmd,
288 const struct ata_taskfile *tf)
289{
290 u64 information;
291
292 if (!cmd)
293 return;
294
295 information = ata_tf_read_block(tf, dev);
296 if (information == U64_MAX)
297 return;
298
299 scsi_set_sense_information(cmd->sense_buffer,
300 SCSI_SENSE_BUFFERSIZE, information);
301}
302
bcfc867d 303static void ata_scsi_set_invalid_field(struct ata_device *dev,
0df10b84 304 struct scsi_cmnd *cmd, u16 field, u8 bit)
bcfc867d
HR		 305{
306 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
307 /* "Invalid field in cbd" */
308 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
0df10b84 309 field, bit, 1);
bcfc867d
HR		 310}
311
7780081c
HR		 312static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
313 struct scsi_cmnd *cmd, u16 field)
314{
315 /* "Invalid field in parameter list" */
316 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
317 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
318 field, 0xff, 0);
319}
320
18f7ba4c
KCA		 321static ssize_t
322ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
323 const char *buf, size_t count)
324{
325 struct Scsi_Host *shost = class_to_shost(dev);
326 struct ata_port *ap = ata_shost_to_port(shost);
327 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
328 return ap->ops->em_store(ap, buf, count);
329 return -EINVAL;
330}
331
332static ssize_t
333ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
334 char *buf)
335{
336 struct Scsi_Host *shost = class_to_shost(dev);
337 struct ata_port *ap = ata_shost_to_port(shost);
338
339 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
340 return ap->ops->em_show(ap, buf);
341 return -EINVAL;
342}
ea7a5ed5 343DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
18f7ba4c
KCA		 344 ata_scsi_em_message_show, ata_scsi_em_message_store);
345EXPORT_SYMBOL_GPL(dev_attr_em_message);
346
347static ssize_t
348ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
349 char *buf)
350{
351 struct Scsi_Host *shost = class_to_shost(dev);
352 struct ata_port *ap = ata_shost_to_port(shost);
353
354 return snprintf(buf, 23, "%d\n", ap->em_message_type);
355}
356DEVICE_ATTR(em_message_type, S_IRUGO,
357 ata_scsi_em_message_type_show, NULL);
358EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
359
360static ssize_t
361ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
362 char *buf)
363{
364 struct scsi_device *sdev = to_scsi_device(dev);
365 struct ata_port *ap = ata_shost_to_port(sdev->host);
366 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
367
26cd4d65
XF		 368 if (atadev && ap->ops->sw_activity_show &&
369 (ap->flags & ATA_FLAG_SW_ACTIVITY))
18f7ba4c
KCA		 370 return ap->ops->sw_activity_show(atadev, buf);
371 return -EINVAL;
372}
373
374static ssize_t
375ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
376 const char *buf, size_t count)
377{
378 struct scsi_device *sdev = to_scsi_device(dev);
379 struct ata_port *ap = ata_shost_to_port(sdev->host);
380 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
381 enum sw_activity val;
382 int rc;
383
26cd4d65
XF		 384 if (atadev && ap->ops->sw_activity_store &&
385 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
18f7ba4c
KCA		 386 val = simple_strtoul(buf, NULL, 0);
387 switch (val) {
388 case OFF: case BLINK_ON: case BLINK_OFF:
389 rc = ap->ops->sw_activity_store(atadev, val);
390 if (!rc)
391 return count;
392 else
393 return rc;
394 }
395 }
396 return -EINVAL;
397}
ea7a5ed5 398DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
18f7ba4c
KCA		 399 ata_scsi_activity_store);
400EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
401
45fabbb7
EO		 402struct device_attribute *ata_common_sdev_attrs[] = {
403 &dev_attr_unload_heads,
404 NULL
405};
406EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
407
06dbde5f 408static void ata_scsi_invalid_field(struct ata_device *dev,
bcfc867d 409 struct scsi_cmnd *cmd, u16 field)
ae006510 410{
0df10b84 411 ata_scsi_set_invalid_field(dev, cmd, field, 0xff);
b27dcfb0 412 cmd->scsi_done(cmd);
ae006510
DG		 413}
414
1da177e4
LT		 415/**
416 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
417 * @sdev: SCSI device for which BIOS geometry is to be determined
418 * @bdev: block device associated with @sdev
419 * @capacity: capacity of SCSI device
420 * @geom: location to which geometry will be output
421 *
422 * Generic bios head/sector/cylinder calculator
423 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
424 * mapping. Some situations may arise where the disk is not
425 * bootable if this is not used.
426 *
427 * LOCKING:
428 * Defined by the SCSI layer. We don't really care.
429 *
430 * RETURNS:
431 * Zero.
432 */
433int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
434 sector_t capacity, int geom[])
435{
436 geom[0] = 255;
437 geom[1] = 63;
438 sector_div(capacity, 255*63);
439 geom[2] = capacity;
440
441 return 0;
442}
443
d8d9129e
TH		 444/**
445 * ata_scsi_unlock_native_capacity - unlock native capacity
446 * @sdev: SCSI device to adjust device capacity for
447 *
448 * This function is called if a partition on @sdev extends beyond
449 * the end of the device. It requests EH to unlock HPA.
450 *
451 * LOCKING:
452 * Defined by the SCSI layer. Might sleep.
453 */
454void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
455{
456 struct ata_port *ap = ata_shost_to_port(sdev->host);
457 struct ata_device *dev;
458 unsigned long flags;
459
460 spin_lock_irqsave(ap->lock, flags);
461
462 dev = ata_scsi_find_dev(ap, sdev);
463 if (dev && dev->n_sectors < dev->n_native_sectors) {
464 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
465 dev->link->eh_info.action |= ATA_EH_RESET;
466 ata_port_schedule_eh(ap);
467 }
468
469 spin_unlock_irqrestore(ap->lock, flags);
470 ata_port_wait_eh(ap);
471}
472
5924b74c
TH		 473/**
474 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 475 * @ap: target port
5924b74c
TH		 476 * @sdev: SCSI device to get identify data for
477 * @arg: User buffer area for identify data
478 *
479 * LOCKING:
480 * Defined by the SCSI layer. We don't really care.
481 *
482 * RETURNS:
483 * Zero on success, negative errno on error.
484 */
94be9a58
JG		 485static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
486 void __user *arg)
5924b74c 487{
5924b74c
TH		 488 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
489 u16 __user *dst = arg;
490 char buf[40];
491
492 if (!dev)
493 return -ENOMSG;
494
495 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
496 return -EFAULT;
497
498 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
499 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
500 return -EFAULT;
501
502 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
503 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
504 return -EFAULT;
505
506 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
507 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
508 return -EFAULT;
509
510 return 0;
511}
512
b095518e
JG		 513/**
514 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 515 * @scsidev: Device to which we are issuing command
b095518e
JG		 516 * @arg: User provided data for issuing command
517 *
518 * LOCKING:
519 * Defined by the SCSI layer. We don't really care.
520 *
521 * RETURNS:
522 * Zero on success, negative errno on error.
523 */
b095518e
JG		 524int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
525{
526 int rc = 0;
527 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 528 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 529 int argsize = 0;
85837ebd 530 enum dma_data_direction data_dir;
bbe1fe7e 531 int cmd_result;
b095518e 532
c893a3ae 533 if (arg == NULL)
b095518e
JG		 534 return -EINVAL;
535
536 if (copy_from_user(args, arg, sizeof(args)))
537 return -EFAULT;
538
bbe1fe7e
ET		 539 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
540 if (!sensebuf)
541 return -ENOMEM;
542
b095518e
JG		 543 memset(scsi_cmd, 0, sizeof(scsi_cmd));
544
545 if (args[3]) {
295124dc 546 argsize = ATA_SECT_SIZE * args[3];
b095518e 547 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 548 if (argbuf == NULL) {
549 rc = -ENOMEM;
550 goto error;
551 }
b095518e
JG		 552
553 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
554 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 555 block count in sector count field */
85837ebd 556 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 557 } else {
558 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 559 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 560 data_dir = DMA_NONE;
b095518e
JG		 561 }
562
563 scsi_cmd[0] = ATA_16;
564
565 scsi_cmd[4] = args[2];
a4f19040 566 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 567 scsi_cmd[6] = args[3];
568 scsi_cmd[8] = args[1];
569 scsi_cmd[10] = 0x4f;
570 scsi_cmd[12] = 0xc2;
571 } else {
572 scsi_cmd[6] = args[1];
573 }
574 scsi_cmd[14] = args[0];
575
576 /* Good values for timeout and retries? Values below
577 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 578 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 579 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 580
581 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
582 u8 *desc = sensebuf + 8;
583 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
584
585 /* If we set cc then ATA pass-through will cause a
586 * check condition even if no error. Filter that. */
587 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
588 struct scsi_sense_hdr sshdr;
589 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e 590 &sshdr);
6d3bfc7b
KM		 591 if (sshdr.sense_key == RECOVERED_ERROR &&
592 sshdr.asc == 0 && sshdr.ascq == 0x1d)
bbe1fe7e
ET		 593 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
594 }
595
596 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 597 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
598 desc[0] == 0x09) { /* code is "ATA Descriptor" */
599 args[0] = desc[13]; /* status */
600 args[1] = desc[3]; /* error */
601 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 602 if (copy_to_user(arg, args, sizeof(args)))
603 rc = -EFAULT;
604 }
605 }
606
607
608 if (cmd_result) {
b095518e
JG		 609 rc = -EIO;
610 goto error;
611 }
612
b095518e 613 if ((argbuf)
c893a3ae 614 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 615 rc = -EFAULT;
616error:
bbe1fe7e 617 kfree(sensebuf);
8f760780 618 kfree(argbuf);
b095518e
JG		 619 return rc;
620}
621
622/**
623 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 624 * @scsidev: Device to which we are issuing command
b095518e
JG		 625 * @arg: User provided data for issuing command
626 *
627 * LOCKING:
628 * Defined by the SCSI layer. We don't really care.
629 *
630 * RETURNS:
631 * Zero on success, negative errno on error.
632 */
633int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
634{
635 int rc = 0;
636 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 637 u8 args[7], *sensebuf = NULL;
638 int cmd_result;
b095518e 639
c893a3ae 640 if (arg == NULL)
b095518e
JG		 641 return -EINVAL;
642
643 if (copy_from_user(args, arg, sizeof(args)))
644 return -EFAULT;
645
af068bd1
DM		 646 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
647 if (!sensebuf)
648 return -ENOMEM;
649
b095518e
JG		 650 memset(scsi_cmd, 0, sizeof(scsi_cmd));
651 scsi_cmd[0] = ATA_16;
652 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 653 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 654 scsi_cmd[4] = args[1];
655 scsi_cmd[6] = args[2];
656 scsi_cmd[8] = args[3];
657 scsi_cmd[10] = args[4];
658 scsi_cmd[12] = args[5];
277239f2 659 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 660 scsi_cmd[14] = args[0];
661
b095518e 662 /* Good values for timeout and retries? Values below
2e9edbf8 663 from scsi_ioctl_send_command() for default case... */
af068bd1 664 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 665 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 666
667 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
668 u8 *desc = sensebuf + 8;
669 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
670
671 /* If we set cc then ATA pass-through will cause a
672 * check condition even if no error. Filter that. */
673 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
674 struct scsi_sense_hdr sshdr;
675 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
676 &sshdr);
6d3bfc7b
KM		 677 if (sshdr.sense_key == RECOVERED_ERROR &&
678 sshdr.asc == 0 && sshdr.ascq == 0x1d)
af068bd1
DM		 679 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
680 }
681
682 /* Send userspace ATA registers */
683 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
684 desc[0] == 0x09) {/* code is "ATA Descriptor" */
685 args[0] = desc[13]; /* status */
686 args[1] = desc[3]; /* error */
687 args[2] = desc[5]; /* sector count (0:7) */
688 args[3] = desc[7]; /* lbal */
689 args[4] = desc[9]; /* lbam */
690 args[5] = desc[11]; /* lbah */
691 args[6] = desc[12]; /* select */
692 if (copy_to_user(arg, args, sizeof(args)))
693 rc = -EFAULT;
694 }
695 }
696
697 if (cmd_result) {
b095518e 698 rc = -EIO;
af068bd1
DM		 699 goto error;
700 }
b095518e 701
af068bd1
DM		 702 error:
703 kfree(sensebuf);
b095518e
JG		 704 return rc;
705}
706
e3cf95dd
AC		 707static int ata_ioc32(struct ata_port *ap)
708{
709 if (ap->flags & ATA_FLAG_PIO_DMA)
710 return 1;
711 if (ap->pflags & ATA_PFLAG_PIO32)
712 return 1;
713 return 0;
714}
715
94be9a58
JG		 716int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
717 int cmd, void __user *arg)
1da177e4 718{
287e6611
AB		 719 unsigned long val;
720 int rc = -EINVAL;
e3cf95dd 721 unsigned long flags;
1da177e4 722
1da177e4 723 switch (cmd) {
287e6611 724 case HDIO_GET_32BIT:
e3cf95dd
AC		 725 spin_lock_irqsave(ap->lock, flags);
726 val = ata_ioc32(ap);
727 spin_unlock_irqrestore(ap->lock, flags);
287e6611 728 return put_user(val, (unsigned long __user *)arg);
1da177e4 729
287e6611 730 case HDIO_SET_32BIT:
1da177e4 731 val = (unsigned long) arg;
e3cf95dd
AC		 732 rc = 0;
733 spin_lock_irqsave(ap->lock, flags);
734 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
735 if (val)
736 ap->pflags |= ATA_PFLAG_PIO32;
737 else
738 ap->pflags &= ~ATA_PFLAG_PIO32;
739 } else {
740 if (val != ata_ioc32(ap))
741 rc = -EINVAL;
742 }
743 spin_unlock_irqrestore(ap->lock, flags);
744 return rc;
1da177e4 745
5924b74c 746 case HDIO_GET_IDENTITY:
94be9a58 747 return ata_get_identity(ap, scsidev, arg);
5924b74c 748
b095518e
JG		 749 case HDIO_DRIVE_CMD:
750 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
751 return -EACCES;
752 return ata_cmd_ioctl(scsidev, arg);
753
754 case HDIO_DRIVE_TASK:
755 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
756 return -EACCES;
757 return ata_task_ioctl(scsidev, arg);
758
1da177e4
LT		 759 default:
760 rc = -ENOTTY;
761 break;
762 }
763
1da177e4
LT		 764 return rc;
765}
94be9a58
JG		 766EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
767
768int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
769{
770 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
771 scsidev, cmd, arg);
772}
773EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 774
775/**
776 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 777 * @dev: ATA device to which the new command is attached
778 * @cmd: SCSI command that originated this ATA command
1da177e4
LT		 779 *
780 * Obtain a reference to an unused ata_queued_cmd structure,
781 * which is the basic libata structure representing a single
782 * ATA command sent to the hardware.
783 *
784 * If a command was available, fill in the SCSI-specific
785 * portions of the structure with information on the
786 * current command.
787 *
788 * LOCKING:
cca3974e 789 * spin_lock_irqsave(host lock)
1da177e4
LT		 790 *
791 * RETURNS:
792 * Command allocated, or %NULL if none available.
793 */
7102d230 794static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
b27dcfb0 795 struct scsi_cmnd *cmd)
1da177e4
LT		 796{
797 struct ata_queued_cmd *qc;
798
12cb5ce1 799 qc = ata_qc_new_init(dev, cmd->request->tag);
1da177e4
LT		 800 if (qc) {
801 qc->scsicmd = cmd;
b27dcfb0 802 qc->scsidone = cmd->scsi_done;
1da177e4 803
ff2aeb1e 804 qc->sg = scsi_sglist(cmd);
7120165c 805 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 806 } else {
807 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
b27dcfb0 808 cmd->scsi_done(cmd);
1da177e4
LT		 809 }
810
811 return qc;
812}
813
aacda375
TH		 814static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
815{
816 struct scsi_cmnd *scmd = qc->scsicmd;
817
818 qc->extrabytes = scmd->request->extra_len;
819 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
820}
821
b095518e
JG		 822/**
823 * ata_dump_status - user friendly display of error info
824 * @id: id of the port in question
825 * @tf: ptr to filled out taskfile
826 *
827 * Decode and dump the ATA error/status registers for the user so
828 * that they have some idea what really happened at the non
829 * make-believe layer.
830 *
831 * LOCKING:
832 * inherited from caller
833 */
7102d230 834static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 835{
836 u8 stat = tf->command, err = tf->feature;
837
838 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
839 if (stat & ATA_BUSY) {
840 printk("Busy }\n"); /* Data is not valid in this case */
841 } else {
1308d7f0
HR		 842 if (stat & ATA_DRDY) printk("DriveReady ");
843 if (stat & ATA_DF) printk("DeviceFault ");
844 if (stat & ATA_DSC) printk("SeekComplete ");
845 if (stat & ATA_DRQ) printk("DataRequest ");
846 if (stat & ATA_CORR) printk("CorrectedError ");
847 if (stat & ATA_SENSE) printk("Sense ");
848 if (stat & ATA_ERR) printk("Error ");
b095518e
JG		 849 printk("}\n");
850
851 if (err) {
852 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
1308d7f0
HR		 853 if (err & ATA_ABORTED) printk("DriveStatusError ");
854 if (err & ATA_ICRC) {
855 if (err & ATA_ABORTED)
856 printk("BadCRC ");
b095518e
JG		 857 else printk("Sector ");
858 }
1308d7f0
HR		 859 if (err & ATA_UNC) printk("UncorrectableError ");
860 if (err & ATA_IDNF) printk("SectorIdNotFound ");
861 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
862 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
b095518e
JG		 863 printk("}\n");
864 }
865 }
866}
867
1da177e4
LT		 868/**
869 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 870 * @id: ATA device number
1da177e4 871 * @drv_stat: value contained in ATA status register
b095518e
JG		 872 * @drv_err: value contained in ATA error register
873 * @sk: the sense key we'll fill out
874 * @asc: the additional sense code we'll fill out
875 * @ascq: the additional sense code qualifier we'll fill out
246619da 876 * @verbose: be verbose
1da177e4 877 *
b095518e
JG		 878 * Converts an ATA error into a SCSI error. Fill out pointers to
879 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
880 * format sense blocks.
1da177e4
LT		 881 *
882 * LOCKING:
cca3974e 883 * spin_lock_irqsave(host lock)
1da177e4 884 */
7102d230
AB		 885static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
886 u8 *asc, u8 *ascq, int verbose)
1da177e4 887{
b095518e 888 int i;
ffe75ef6 889
1da177e4 890 /* Based on the 3ware driver translation table */
98ac62de 891 static const unsigned char sense_table[][4] = {
1da177e4 892 /* BBD|ECC|ID|MAR */
8ae72044
HR		 893 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
894 // Device busy Aborted command
1da177e4 895 /* BBD|ECC|ID */
8ae72044
HR		 896 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
897 // Device busy Aborted command
1da177e4 898 /* ECC|MC|MARK */
8ae72044
HR		 899 {0x61, HARDWARE_ERROR, 0x00, 0x00},
900 // Device fault Hardware error
1da177e4 901 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
8ae72044
HR		 902 {0x84, ABORTED_COMMAND, 0x47, 0x00},
903 // Data CRC error SCSI parity error
1da177e4 904 /* MC|ID|ABRT|TRK0|MARK */
8ae72044
HR		 905 {0x37, NOT_READY, 0x04, 0x00},
906 // Unit offline Not ready
1da177e4 907 /* MCR|MARK */
8ae72044
HR		 908 {0x09, NOT_READY, 0x04, 0x00},
909 // Unrecovered disk error Not ready
1da177e4 910 /* Bad address mark */
8ae72044
HR		 911 {0x01, MEDIUM_ERROR, 0x13, 0x00},
912 // Address mark not found for data field
913 /* TRK0 - Track 0 not found */
914 {0x02, HARDWARE_ERROR, 0x00, 0x00},
915 // Hardware error
78062c50 916 /* Abort: 0x04 is not translated here, see below */
1da177e4 917 /* Media change request */
8ae72044
HR		 918 {0x08, NOT_READY, 0x04, 0x00},
919 // FIXME: faking offline
920 /* SRV/IDNF - ID not found */
921 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
922 // Logical address out of range
923 /* MC - Media Changed */
924 {0x20, UNIT_ATTENTION, 0x28, 0x00},
925 // Not ready to ready change, medium may have changed
926 /* ECC - Uncorrectable ECC error */
927 {0x40, MEDIUM_ERROR, 0x11, 0x04},
928 // Unrecovered read error
1da177e4 929 /* BBD - block marked bad */
8ae72044
HR		 930 {0x80, MEDIUM_ERROR, 0x11, 0x04},
931 // Block marked bad Medium error, unrecovered read error
1da177e4
LT		 932 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
933 };
98ac62de 934 static const unsigned char stat_table[][4] = {
1da177e4 935 /* Must be first because BUSY means no other bits valid */
8ae72044
HR		 936 {0x80, ABORTED_COMMAND, 0x47, 0x00},
937 // Busy, fake parity for now
938 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
939 // Device ready, unaligned write command
940 {0x20, HARDWARE_ERROR, 0x44, 0x00},
941 // Device fault, internal target failure
942 {0x08, ABORTED_COMMAND, 0x47, 0x00},
943 // Timed out in xfer, fake parity for now
944 {0x04, RECOVERED_ERROR, 0x11, 0x00},
945 // Recovered ECC error Medium error, recovered
1da177e4
LT		 946 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
947 };
1da177e4 948
1da177e4
LT		 949 /*
950 * Is this an error we can process/parse
951 */
b095518e
JG		 952 if (drv_stat & ATA_BUSY) {
953 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 954 }
b095518e
JG		 955
956 if (drv_err) {
957 /* Look for drv_err */
958 for (i = 0; sense_table[i][0] != 0xFF; i++) {
959 /* Look for best matches first */
2e9edbf8 960 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 961 sense_table[i][0]) {
962 *sk = sense_table[i][1];
963 *asc = sense_table[i][2];
964 *ascq = sense_table[i][3];
965 goto translate_done;
966 }
967 }
1da177e4 968 }
b095518e 969
78062c50
GG		 970 /*
971 * Fall back to interpreting status bits. Note that if the drv_err
972 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
973 * is not descriptive enough.
974 */
b095518e
JG		 975 for (i = 0; stat_table[i][0] != 0xFF; i++) {
976 if (stat_table[i][0] & drv_stat) {
977 *sk = stat_table[i][1];
978 *asc = stat_table[i][2];
979 *ascq = stat_table[i][3];
980 goto translate_done;
1da177e4 981 }
b095518e 982 }
b095518e 983
78062c50
GG		 984 /*
985 * We need a sensible error return here, which is tricky, and one
986 * that won't cause people to do things like return a disk wrongly.
987 */
2d202024
AC		 988 *sk = ABORTED_COMMAND;
989 *asc = 0x00;
990 *ascq = 0x00;
b095518e
JG		 991
992 translate_done:
246619da
TH		 993 if (verbose)
994 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
995 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
996 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 997 return;
998}
999
1000/*
750426aa 1001 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 1002 * @qc: Command that completed.
1003 *
1004 * This function is specific to the ATA descriptor format sense
1005 * block specified for the ATA pass through commands. Regardless
1006 * of whether the command errored or not, return a sense
1007 * block. Copy all controller registers into the sense
84a9a8cd
GG		 1008 * block. If there was no error, we get the request from an ATA
1009 * passthrough command, so we use the following sense data:
1010 * sk = RECOVERED ERROR
1011 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1012 *
b095518e
JG		 1013 *
1014 * LOCKING:
750426aa 1015 * None.
b095518e 1016 */
750426aa 1017static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 1018{
1019 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1020 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 1021 unsigned char *sb = cmd->sense_buffer;
1022 unsigned char *desc = sb + 8;
246619da 1023 int verbose = qc->ap->ops->error_handler == NULL;
b525e773 1024 u8 sense_key, asc, ascq;
b095518e
JG		 1025
1026 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1027
0e5dec47 1028 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1029
b095518e
JG		 1030 /*
1031 * Use ata_to_sense_error() to map status register bits
1032 * onto sense key, asc & ascq.
1033 */
058e55e1
TH		 1034 if (qc->err_mask ||
1035 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1036 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
b525e773 1037 &sense_key, &asc, &ascq, verbose);
06dbde5f 1038 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
84a9a8cd 1039 } else {
11093cb1
HR		 1040 /*
1041 * ATA PASS-THROUGH INFORMATION AVAILABLE
1042 * Always in descriptor format sense.
1043 */
1044 scsi_build_sense_buffer(1, cmd->sense_buffer,
1045 RECOVERED_ERROR, 0, 0x1D);
1da177e4
LT		 1046 }
1047
11093cb1
HR		 1048 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1049 u8 len;
1050
1051 /* descriptor format */
1052 len = sb[7];
1053 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1054 if (!desc) {
1055 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1056 return;
1057 sb[7] = len + 14;
1058 desc = sb + 8 + len;
1059 }
1060 desc[0] = 9;
1061 desc[1] = 12;
1062 /*
1063 * Copy registers into sense buffer.
1064 */
1065 desc[2] = 0x00;
1066 desc[3] = tf->feature; /* == error reg */
1067 desc[5] = tf->nsect;
1068 desc[7] = tf->lbal;
1069 desc[9] = tf->lbam;
1070 desc[11] = tf->lbah;
1071 desc[12] = tf->device;
1072 desc[13] = tf->command; /* == status reg */
1073
1074 /*
1075 * Fill in Extend bit, and the high order bytes
1076 * if applicable.
1077 */
1078 if (tf->flags & ATA_TFLAG_LBA48) {
1079 desc[2] |= 0x01;
1080 desc[4] = tf->hob_nsect;
1081 desc[6] = tf->hob_lbal;
1082 desc[8] = tf->hob_lbam;
1083 desc[10] = tf->hob_lbah;
1084 }
1085 } else {
1086 /* Fixed sense format */
1087 desc[0] = tf->feature;
1088 desc[1] = tf->command; /* status */
1089 desc[2] = tf->device;
1090 desc[3] = tf->nsect;
1091 desc[0] = 0;
1092 if (tf->flags & ATA_TFLAG_LBA48) {
1093 desc[8] |= 0x80;
1094 if (tf->hob_nsect)
1095 desc[8] |= 0x40;
1096 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1097 desc[8] |= 0x20;
1098 }
1099 desc[9] = tf->lbal;
1100 desc[10] = tf->lbam;
1101 desc[11] = tf->lbah;
1da177e4 1102 }
b095518e 1103}
1da177e4 1104
b095518e 1105/**
750426aa 1106 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1107 * @qc: Command that we are erroring out
1108 *
d25614ba 1109 * Generate sense block for a failed ATA command @qc. Descriptor
25985edc 1110 * format is used to accommodate LBA48 block address.
b095518e
JG		 1111 *
1112 * LOCKING:
750426aa 1113 * None.
b095518e 1114 */
750426aa 1115static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1116{
d25614ba 1117 struct ata_device *dev = qc->dev;
b095518e 1118 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1119 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1120 unsigned char *sb = cmd->sense_buffer;
246619da 1121 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1122 u64 block;
b525e773 1123 u8 sense_key, asc, ascq;
b095518e
JG		 1124
1125 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1126
0e5dec47 1127 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1128
59f68474
HR		 1129 if (ata_dev_disabled(dev)) {
1130 /* Device disabled after error recovery */
1131 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1132 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1133 return;
1134 }
d25614ba 1135 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1136 * onto sense key, asc & ascq.
1137 */
058e55e1
TH		 1138 if (qc->err_mask ||
1139 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1140 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
b525e773 1141 &sense_key, &asc, &ascq, verbose);
06dbde5f 1142 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
5e6acd1c
HR		 1143 } else {
1144 /* Could not decode error */
1145 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1146 tf->command, qc->err_mask);
06dbde5f 1147 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
5e6acd1c 1148 return;
1da177e4 1149 }
1da177e4 1150
d25614ba 1151 block = ata_tf_read_block(&qc->result_tf, dev);
cffd1ee9
HR		 1152 if (block == U64_MAX)
1153 return;
a7dac447 1154
cf8b49b0 1155 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1da177e4
LT		 1156}
1157
a6cce2a7
BK		 1158static void ata_scsi_sdev_config(struct scsi_device *sdev)
1159{
1160 sdev->use_10_for_rw = 1;
1161 sdev->use_10_for_ms = 1;
3c6bdaea 1162 sdev->no_report_opcodes = 1;
5db44863 1163 sdev->no_write_same = 1;
31cc23b3
TH		 1164
1165 /* Schedule policy is determined by ->qc_defer() callback and
1166 * it needs to see every deferred qc. Set dev_blocked to 1 to
1167 * prevent SCSI midlayer from automatically deferring
1168 * requests.
1169 */
1170 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1171}
1172
fa2fc7f4
JB		 1173/**
1174 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1175 * @rq: request to be checked
fa2fc7f4
JB		 1176 *
1177 * ATAPI commands which transfer variable length data to host
1178 * might overflow due to application error or hardare bug. This
1179 * function checks whether overflow should be drained and ignored
1180 * for @request.
1181 *
1182 * LOCKING:
1183 * None.
1184 *
1185 * RETURNS:
1186 * 1 if ; otherwise, 0.
1187 */
1188static int atapi_drain_needed(struct request *rq)
1189{
33659ebb 1190 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1191 return 0;
1192
7b6d91da 1193 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
fa2fc7f4
JB		 1194 return 0;
1195
1196 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1197}
1198
1199static int ata_scsi_dev_config(struct scsi_device *sdev,
1200 struct ata_device *dev)
a6cce2a7 1201{
900e599e 1202 struct request_queue *q = sdev->request_queue;
1203
45fabbb7
EO		 1204 if (!ata_id_has_unload(dev->id))
1205 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1206
914ed354 1207 /* configure max sectors */
900e599e 1208 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1209
fa2fc7f4 1210 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1211 void *buf;
1212
729a6a30
TH		 1213 sdev->sector_size = ATA_SECT_SIZE;
1214
1215 /* set DMA padding */
900e599e 1216 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1217
1218 /* configure draining */
1219 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1220 if (!buf) {
a9a79dfe 1221 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1222 return -ENOMEM;
1223 }
1224
1225 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1226 } else {
295124dc 1227 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1228 sdev->manage_start_stop = 1;
dde20207 1229 }
d8cf5389 1230
729a6a30
TH		 1231 /*
1232 * ata_pio_sectors() expects buffer for each sector to not cross
1233 * page boundary. Enforce it by requiring buffers to be sector
1234 * aligned, which works iff sector_size is not larger than
1235 * PAGE_SIZE. ATAPI devices also need the alignment as
1236 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1237 */
1238 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1239 ata_dev_warn(dev,
729a6a30
TH		 1240 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1241 sdev->sector_size);
1242
900e599e 1243 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1244
f26792d5
JG		 1245 if (dev->flags & ATA_DFLAG_AN)
1246 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1247
a6e6ce8e
TH		 1248 if (dev->flags & ATA_DFLAG_NCQ) {
1249 int depth;
1250
1251 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1252 depth = min(ATA_MAX_QUEUE - 1, depth);
db5ed4df 1253 scsi_change_queue_depth(sdev, depth);
a6e6ce8e 1254 }
fa2fc7f4 1255
900e599e 1256 blk_queue_flush_queueable(q, false);
1257
295124dc 1258 dev->sdev = sdev;
fa2fc7f4 1259 return 0;
a6cce2a7
BK		 1260}
1261
1da177e4
LT		 1262/**
1263 * ata_scsi_slave_config - Set SCSI device attributes
1264 * @sdev: SCSI device to examine
1265 *
1266 * This is called before we actually start reading
1267 * and writing to the device, to configure certain
1268 * SCSI mid-layer behaviors.
1269 *
1270 * LOCKING:
1271 * Defined by SCSI layer. We don't really care.
1272 */
1273
1274int ata_scsi_slave_config(struct scsi_device *sdev)
1275{
31534363
TH		 1276 struct ata_port *ap = ata_shost_to_port(sdev->host);
1277 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1278 int rc = 0;
31534363 1279
a6cce2a7 1280 ata_scsi_sdev_config(sdev);
1da177e4 1281
31534363 1282 if (dev)
fa2fc7f4 1283 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1284
fa2fc7f4 1285 return rc;
1da177e4
LT		 1286}
1287
83c47bcb
TH		 1288/**
1289 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1290 * @sdev: SCSI device to be destroyed
1291 *
1292 * @sdev is about to be destroyed for hot/warm unplugging. If
1293 * this unplugging was initiated by libata as indicated by NULL
1294 * dev->sdev, this function doesn't have to do anything.
1295 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1296 * Clear dev->sdev, schedule the device for ATA detach and invoke
1297 * EH.
1298 *
1299 * LOCKING:
1300 * Defined by SCSI layer. We don't really care.
1301 */
1302void ata_scsi_slave_destroy(struct scsi_device *sdev)
1303{
1304 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1305 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1306 unsigned long flags;
1307 struct ata_device *dev;
1308
1309 if (!ap->ops->error_handler)
1310 return;
1311
ba6a1308 1312 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1313 dev = __ata_scsi_find_dev(ap, sdev);
1314 if (dev && dev->sdev) {
1315 /* SCSI device already in CANCEL state, no need to offline it */
1316 dev->sdev = NULL;
1317 dev->flags |= ATA_DFLAG_DETACH;
1318 ata_port_schedule_eh(ap);
1319 }
ba6a1308 1320 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1321
1322 kfree(q->dma_drain_buffer);
1323 q->dma_drain_buffer = NULL;
1324 q->dma_drain_size = 0;
83c47bcb
TH		 1325}
1326
a6e6ce8e 1327/**
f6e67035 1328 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
6d2dd054
MPS		 1329 * @ap: ATA port to which the device change the queue depth
1330 * @sdev: SCSI device to configure queue depth for
1331 * @queue_depth: new queue depth
a6e6ce8e 1332 *
f6e67035
DW		 1333 * libsas and libata have different approaches for associating a sdev to
1334 * its ata_port.
a6e6ce8e 1335 *
a6e6ce8e 1336 */
f6e67035 1337int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
db5ed4df 1338 int queue_depth)
a6e6ce8e 1339{
a6e6ce8e 1340 struct ata_device *dev;
360f654e 1341 unsigned long flags;
a6e6ce8e 1342
c3c70c44 1343 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1344 return sdev->queue_depth;
1345
1346 dev = ata_scsi_find_dev(ap, sdev);
1347 if (!dev || !ata_dev_enabled(dev))
1348 return sdev->queue_depth;
1349
c3c70c44 1350 /* NCQ enabled? */
360f654e 1351 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1352 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1353 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1354 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1355 queue_depth = 1;
1356 }
360f654e
TH		 1357 spin_unlock_irqrestore(ap->lock, flags);
1358
c3c70c44
TH		 1359 /* limit and apply queue depth */
1360 queue_depth = min(queue_depth, sdev->host->can_queue);
1361 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1362 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1363
1364 if (sdev->queue_depth == queue_depth)
1365 return -EINVAL;
1366
db5ed4df 1367 return scsi_change_queue_depth(sdev, queue_depth);
a6e6ce8e
TH		 1368}
1369
f6e67035
DW		 1370/**
1371 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1372 * @sdev: SCSI device to configure queue depth for
1373 * @queue_depth: new queue depth
f6e67035
DW		 1374 *
1375 * This is libata standard hostt->change_queue_depth callback.
1376 * SCSI will call into this callback when user tries to set queue
1377 * depth via sysfs.
1378 *
1379 * LOCKING:
1380 * SCSI layer (we don't care)
1381 *
1382 * RETURNS:
1383 * Newly configured queue depth.
1384 */
db5ed4df 1385int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
f6e67035
DW		 1386{
1387 struct ata_port *ap = ata_shost_to_port(sdev->host);
1388
db5ed4df 1389 return __ata_change_queue_depth(ap, sdev, queue_depth);
f6e67035
DW		 1390}
1391
972dcafb
DG		 1392/**
1393 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1394 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1395 *
1396 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1397 * (to start). Perhaps these commands should be preceded by
1398 * CHECK POWER MODE to see what power mode the device is already in.
1399 * [See SAT revision 5 at www.t10.org]
1400 *
1401 * LOCKING:
cca3974e 1402 * spin_lock_irqsave(host lock)
972dcafb
DG		 1403 *
1404 * RETURNS:
1405 * Zero on success, non-zero on error.
1406 */
ad706991 1407static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1408{
542b1444 1409 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1410 struct ata_taskfile *tf = &qc->tf;
ad706991 1411 const u8 *cdb = scmd->cmnd;
bcfc867d 1412 u16 fp;
0df10b84 1413 u8 bp = 0xff;
972dcafb 1414
bcfc867d
HR		 1415 if (scmd->cmd_len < 5) {
1416 fp = 4;
2e5704f6 1417 goto invalid_fld;
bcfc867d 1418 }
2e5704f6 1419
972dcafb
DG		 1420 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1421 tf->protocol = ATA_PROT_NODATA;
542b1444 1422 if (cdb[1] & 0x1) {
972dcafb
DG		 1423 ; /* ignore IMMED bit, violates sat-r05 */
1424 }
bcfc867d
HR		 1425 if (cdb[4] & 0x2) {
1426 fp = 4;
0df10b84 1427 bp = 1;
ae006510 1428 goto invalid_fld; /* LOEJ bit set not supported */
bcfc867d
HR		 1429 }
1430 if (((cdb[4] >> 4) & 0xf) != 0) {
1431 fp = 4;
0df10b84 1432 bp = 3;
ae006510 1433 goto invalid_fld; /* power conditions not supported */
bcfc867d 1434 }
e31e8531 1435
542b1444 1436 if (cdb[4] & 0x1) {
972dcafb 1437 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1438
1439 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1440 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1441
1442 tf->lbah = 0x0;
1443 tf->lbam = 0x0;
1444 tf->lbal = 0x0;
1445 tf->device |= ATA_LBA;
1446 } else {
1447 /* CHS */
1448 tf->lbal = 0x1; /* sect */
1449 tf->lbam = 0x0; /* cyl low */
1450 tf->lbah = 0x0; /* cyl high */
1451 }
1452
972dcafb 1453 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1454 } else {
2a6e58d2
RW		 1455 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1456 * or S5) causing some drives to spin up and down again.
1457 */
1458 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1459 system_state == SYSTEM_POWER_OFF)
1460 goto skip;
1461
1462 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1463 system_entering_hibernation())
1464 goto skip;
1465
78981a7c
RH		 1466 /* Issue ATA STANDBY IMMEDIATE command */
1467 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1468 }
78981a7c 1469
972dcafb
DG		 1470 /*
1471 * Standby and Idle condition timers could be implemented but that
1472 * would require libata to implement the Power condition mode page
1473 * and allow the user to change it. Changing mode pages requires
1474 * MODE SELECT to be implemented.
1475 */
1476
1477 return 0;
ae006510 1478
2a6e58d2 1479 invalid_fld:
0df10b84 1480 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
ae006510 1481 return 1;
2a6e58d2
RW		 1482 skip:
1483 scmd->result = SAM_STAT_GOOD;
1484 return 1;
972dcafb
DG		 1485}
1486
1487
1da177e4
LT		 1488/**
1489 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1490 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1491 *
1492 * Sets up an ATA taskfile to issue FLUSH CACHE or
1493 * FLUSH CACHE EXT.
1494 *
1495 * LOCKING:
cca3974e 1496 * spin_lock_irqsave(host lock)
1da177e4
LT		 1497 *
1498 * RETURNS:
1499 * Zero on success, non-zero on error.
1500 */
ad706991 1501static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1502{
1503 struct ata_taskfile *tf = &qc->tf;
1504
1505 tf->flags |= ATA_TFLAG_DEVICE;
1506 tf->protocol = ATA_PROT_NODATA;
1507
6fc49adb 1508 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1509 tf->command = ATA_CMD_FLUSH_EXT;
1510 else
1511 tf->command = ATA_CMD_FLUSH;
1512
b666da35
TH		 1513 /* flush is critical for IO integrity, consider it an IO command */
1514 qc->flags |= ATA_QCFLAG_IO;
1515
1da177e4
LT		 1516 return 0;
1517}
1518
3aef5231
AL		 1519/**
1520 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1521 * @cdb: SCSI command to translate
3aef5231
AL		 1522 *
1523 * Calculate LBA and transfer length for 6-byte commands.
1524 *
1525 * RETURNS:
1526 * @plba: the LBA
1527 * @plen: the transfer length
1528 */
542b1444 1529static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1530{
1531 u64 lba = 0;
6c7b7d2b 1532 u32 len;
3aef5231
AL		 1533
1534 VPRINTK("six-byte command\n");
1535
6c7b7d2b 1536 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1537 lba |= ((u64)cdb[2]) << 8;
1538 lba |= ((u64)cdb[3]);
3aef5231 1539
6c7b7d2b 1540 len = cdb[4];
3aef5231
AL		 1541
1542 *plba = lba;
1543 *plen = len;
1544}
1545
1546/**
1547 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1548 * @cdb: SCSI command to translate
3aef5231
AL		 1549 *
1550 * Calculate LBA and transfer length for 10-byte commands.
1551 *
1552 * RETURNS:
1553 * @plba: the LBA
1554 * @plen: the transfer length
1555 */
542b1444 1556static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1557{
1558 u64 lba = 0;
1559 u32 len = 0;
1560
1561 VPRINTK("ten-byte command\n");
1562
542b1444
TH		 1563 lba |= ((u64)cdb[2]) << 24;
1564 lba |= ((u64)cdb[3]) << 16;
1565 lba |= ((u64)cdb[4]) << 8;
1566 lba |= ((u64)cdb[5]);
3aef5231 1567
542b1444
TH		 1568 len |= ((u32)cdb[7]) << 8;
1569 len |= ((u32)cdb[8]);
3aef5231
AL		 1570
1571 *plba = lba;
1572 *plen = len;
1573}
1574
1575/**
1576 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1577 * @cdb: SCSI command to translate
3aef5231
AL		 1578 *
1579 * Calculate LBA and transfer length for 16-byte commands.
1580 *
1581 * RETURNS:
1582 * @plba: the LBA
1583 * @plen: the transfer length
1584 */
542b1444 1585static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1586{
1587 u64 lba = 0;
1588 u32 len = 0;
1589
1590 VPRINTK("sixteen-byte command\n");
1591
542b1444
TH		 1592 lba |= ((u64)cdb[2]) << 56;
1593 lba |= ((u64)cdb[3]) << 48;
1594 lba |= ((u64)cdb[4]) << 40;
1595 lba |= ((u64)cdb[5]) << 32;
1596 lba |= ((u64)cdb[6]) << 24;
1597 lba |= ((u64)cdb[7]) << 16;
1598 lba |= ((u64)cdb[8]) << 8;
1599 lba |= ((u64)cdb[9]);
3aef5231 1600
542b1444
TH		 1601 len |= ((u32)cdb[10]) << 24;
1602 len |= ((u32)cdb[11]) << 16;
1603 len |= ((u32)cdb[12]) << 8;
1604 len |= ((u32)cdb[13]);
3aef5231
AL		 1605
1606 *plba = lba;
1607 *plen = len;
1608}
1609
1da177e4
LT		 1610/**
1611 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1612 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1613 *
1614 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1615 *
1616 * LOCKING:
cca3974e 1617 * spin_lock_irqsave(host lock)
1da177e4
LT		 1618 *
1619 * RETURNS:
1620 * Zero on success, non-zero on error.
1621 */
ad706991 1622static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1623{
542b1444 1624 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1625 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1626 struct ata_device *dev = qc->dev;
1da177e4 1627 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1628 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1629 u64 block;
1630 u32 n_block;
bcfc867d 1631 u16 fp;
1da177e4
LT		 1632
1633 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1634 tf->protocol = ATA_PROT_NODATA;
1da177e4 1635
2e5704f6 1636 if (cdb[0] == VERIFY) {
bcfc867d
HR		 1637 if (scmd->cmd_len < 10) {
1638 fp = 9;
2e5704f6 1639 goto invalid_fld;
bcfc867d 1640 }
542b1444 1641 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6 1642 } else if (cdb[0] == VERIFY_16) {
bcfc867d
HR		 1643 if (scmd->cmd_len < 16) {
1644 fp = 15;
2e5704f6 1645 goto invalid_fld;
bcfc867d 1646 }
542b1444 1647 scsi_16_lba_len(cdb, &block, &n_block);
bcfc867d
HR		 1648 } else {
1649 fp = 0;
ae006510 1650 goto invalid_fld;
bcfc867d 1651 }
1da177e4 1652
8bf62ece 1653 if (!n_block)
ae006510 1654 goto nothing_to_do;
8bf62ece 1655 if (block >= dev_sectors)
ae006510 1656 goto out_of_range;
8bf62ece 1657 if ((block + n_block) > dev_sectors)
ae006510 1658 goto out_of_range;
1da177e4 1659
07506697
AL		 1660 if (dev->flags & ATA_DFLAG_LBA) {
1661 tf->flags |= ATA_TFLAG_LBA;
1662
c6a33e24
AL		 1663 if (lba_28_ok(block, n_block)) {
1664 /* use LBA28 */
1665 tf->command = ATA_CMD_VERIFY;
1666 tf->device |= (block >> 24) & 0xf;
1667 } else if (lba_48_ok(block, n_block)) {
1668 if (!(dev->flags & ATA_DFLAG_LBA48))
1669 goto out_of_range;
07506697
AL		 1670
1671 /* use LBA48 */
1672 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1673 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1674
8bf62ece 1675 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1676
8bf62ece
AL		 1677 tf->hob_lbah = (block >> 40) & 0xff;
1678 tf->hob_lbam = (block >> 32) & 0xff;
1679 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1680 } else
1681 /* request too large even for LBA48 */
1682 goto out_of_range;
8bf62ece
AL		 1683
1684 tf->nsect = n_block & 0xff;
1da177e4 1685
8bf62ece
AL		 1686 tf->lbah = (block >> 16) & 0xff;
1687 tf->lbam = (block >> 8) & 0xff;
1688 tf->lbal = block & 0xff;
1da177e4 1689
8bf62ece
AL		 1690 tf->device |= ATA_LBA;
1691 } else {
1692 /* CHS */
1693 u32 sect, head, cyl, track;
1694
c6a33e24
AL		 1695 if (!lba_28_ok(block, n_block))
1696 goto out_of_range;
07506697 1697
8bf62ece
AL		 1698 /* Convert LBA to CHS */
1699 track = (u32)block / dev->sectors;
1700 cyl = track / dev->heads;
1701 head = track % dev->heads;
1702 sect = (u32)block % dev->sectors + 1;
1703
c187c4b5
AL		 1704 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1705 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1706
1707 /* Check whether the converted CHS can fit.
1708 Cylinder: 0-65535
8bf62ece
AL		 1709 Head: 0-15
1710 Sector: 1-255*/
2e9edbf8 1711 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1712 goto out_of_range;
2e9edbf8 1713
8bf62ece
AL		 1714 tf->command = ATA_CMD_VERIFY;
1715 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1716 tf->lbal = sect;
1717 tf->lbam = cyl;
1718 tf->lbah = cyl >> 8;
1719 tf->device |= head;
1720 }
1da177e4
LT		 1721
1722 return 0;
ae006510
DG		 1723
1724invalid_fld:
0df10b84 1725 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
ae006510
DG		 1726 return 1;
1727
1728out_of_range:
06dbde5f 1729 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1730 /* "Logical Block Address out of range" */
1731 return 1;
1732
1733nothing_to_do:
542b1444 1734 scmd->result = SAM_STAT_GOOD;
ae006510 1735 return 1;
1da177e4
LT		 1736}
1737
1738/**
1739 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1740 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1741 *
1742 * Converts any of six SCSI read/write commands into the
1743 * ATA counterpart, including starting sector (LBA),
1744 * sector count, and taking into account the device's LBA48
1745 * support.
1746 *
1747 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1748 * %WRITE_16 are currently supported.
1749 *
1750 * LOCKING:
cca3974e 1751 * spin_lock_irqsave(host lock)
1da177e4
LT		 1752 *
1753 * RETURNS:
1754 * Zero on success, non-zero on error.
1755 */
ad706991 1756static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1757{
542b1444 1758 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1759 const u8 *cdb = scmd->cmnd;
bd056d7e 1760 unsigned int tf_flags = 0;
3aef5231
AL		 1761 u64 block;
1762 u32 n_block;
bd056d7e 1763 int rc;
bcfc867d 1764 u16 fp = 0;
1da177e4 1765
542b1444 1766 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1767 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1768
9a3dccc4 1769 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1770 switch (cdb[0]) {
3aef5231
AL		 1771 case READ_10:
1772 case WRITE_10:
bcfc867d
HR		 1773 if (unlikely(scmd->cmd_len < 10)) {
1774 fp = 9;
2e5704f6 1775 goto invalid_fld;
bcfc867d 1776 }
542b1444 1777 scsi_10_lba_len(cdb, &block, &n_block);
3e451a49 1778 if (cdb[1] & (1 << 3))
bd056d7e 1779 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1780 break;
1781 case READ_6:
1782 case WRITE_6:
bcfc867d
HR		 1783 if (unlikely(scmd->cmd_len < 6)) {
1784 fp = 5;
2e5704f6 1785 goto invalid_fld;
bcfc867d 1786 }
542b1444 1787 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1788
1789 /* for 6-byte r/w commands, transfer length 0
1790 * means 256 blocks of data, not 0 block.
1791 */
76b2bf9b
JG		 1792 if (!n_block)
1793 n_block = 256;
3aef5231
AL		 1794 break;
1795 case READ_16:
1796 case WRITE_16:
bcfc867d
HR		 1797 if (unlikely(scmd->cmd_len < 16)) {
1798 fp = 15;
2e5704f6 1799 goto invalid_fld;
bcfc867d 1800 }
542b1444 1801 scsi_16_lba_len(cdb, &block, &n_block);
3e451a49 1802 if (cdb[1] & (1 << 3))
bd056d7e 1803 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1804 break;
1805 default:
8bf62ece 1806 DPRINTK("no-byte command\n");
bcfc867d 1807 fp = 0;
ae006510 1808 goto invalid_fld;
1da177e4
LT		 1809 }
1810
8bf62ece
AL		 1811 /* Check and compose ATA command */
1812 if (!n_block)
c187c4b5
AL		 1813 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1814 * length 0 means transfer 0 block of data.
1815 * However, for ATA R/W commands, sector count 0 means
1816 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1817 *
1818 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1819 */
ae006510 1820 goto nothing_to_do;
1da177e4 1821
bd056d7e 1822 qc->flags |= ATA_QCFLAG_IO;
295124dc 1823 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1824
bd056d7e
TH		 1825 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1826 qc->tag);
1827 if (likely(rc == 0))
1828 return 0;
ae006510 1829
bd056d7e
TH		 1830 if (rc == -ERANGE)
1831 goto out_of_range;
1832 /* treat all other errors as -EINVAL, fall through */
ae006510 1833invalid_fld:
0df10b84 1834 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
ae006510
DG		 1835 return 1;
1836
1837out_of_range:
06dbde5f 1838 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1839 /* "Logical Block Address out of range" */
1840 return 1;
1841
1842nothing_to_do:
542b1444 1843 scmd->result = SAM_STAT_GOOD;
ae006510 1844 return 1;
1da177e4
LT		 1845}
1846
2aa8f5d6
CH		 1847static void ata_qc_done(struct ata_queued_cmd *qc)
1848{
1849 struct scsi_cmnd *cmd = qc->scsicmd;
1850 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1851
1852 ata_qc_free(qc);
1853 done(cmd);
1854}
1855
77853bf2 1856static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1857{
c31f571d 1858 struct ata_port *ap = qc->ap;
1da177e4 1859 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1860 u8 *cdb = cmd->cmnd;
2dcb407e 1861 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1862
1863 /* For ATA pass thru (SAT) commands, generate a sense block if
1864 * user mandated it or if there's an error. Note that if we
84a9a8cd
GG		 1865 * generate because the user forced us to [CK_COND =1], a check
1866 * condition is generated and the ATA register values are returned
b095518e 1867 * whether the command completed successfully or not. If there
84a9a8cd
GG		 1868 * was no error, we use the following sense data:
1869 * sk = RECOVERED ERROR
1870 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
b095518e 1871 */
a7dac447 1872 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
25c7ce7f 1873 ((cdb[2] & 0x20) || need_sense))
750426aa 1874 ata_gen_passthru_sense(qc);
5b01e4b9
HR		 1875 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1876 cmd->result = SAM_STAT_CHECK_CONDITION;
25c7ce7f
CH		 1877 else if (need_sense)
1878 ata_gen_ata_sense(qc);
1879 else
1880 cmd->result = SAM_STAT_GOOD;
1da177e4 1881
c31f571d 1882 if (need_sense && !ap->ops->error_handler)
44877b4e 1883 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4 1884
2aa8f5d6 1885 ata_qc_done(qc);
1da177e4
LT		 1886}
1887
1888/**
1889 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1890 * @dev: ATA device to which the command is addressed
1891 * @cmd: SCSI command to execute
1da177e4
LT		 1892 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1893 *
1894 * Our ->queuecommand() function has decided that the SCSI
1895 * command issued can be directly translated into an ATA
1896 * command, rather than handled internally.
1897 *
1898 * This function sets up an ata_queued_cmd structure for the
1899 * SCSI command, and sends that ata_queued_cmd to the hardware.
1900 *
ae006510
DG		 1901 * The xlat_func argument (actor) returns 0 if ready to execute
1902 * ATA command, else 1 to finish translation. If 1 is returned
1903 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1904 * to be set reflecting an error condition or clean (early)
1905 * termination.
1906 *
1da177e4 1907 * LOCKING:
cca3974e 1908 * spin_lock_irqsave(host lock)
2115ea94
TH		 1909 *
1910 * RETURNS:
1911 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1912 * needs to be deferred.
1da177e4 1913 */
2115ea94 1914static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1915 ata_xlat_func_t xlat_func)
1da177e4 1916{
31cc23b3 1917 struct ata_port *ap = dev->link->ap;
1da177e4 1918 struct ata_queued_cmd *qc;
31cc23b3 1919 int rc;
1da177e4
LT		 1920
1921 VPRINTK("ENTER\n");
1922
b27dcfb0 1923 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 1924 if (!qc)
ae006510 1925 goto err_mem;
1da177e4
LT		 1926
1927 /* data is present; dma-map it */
be7db055 1928 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1929 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1930 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 1931 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 1932 goto err_did;
1da177e4
LT		 1933 }
1934
7120165c 1935 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1936
1937 qc->dma_dir = cmd->sc_data_direction;
1938 }
1939
1940 qc->complete_fn = ata_scsi_qc_complete;
1941
ad706991 1942 if (xlat_func(qc))
ae006510 1943 goto early_finish;
1da177e4 1944
31cc23b3
TH		 1945 if (ap->ops->qc_defer) {
1946 if ((rc = ap->ops->qc_defer(qc)))
1947 goto defer;
1948 }
1949
1da177e4 1950 /* select device, send command to hardware */
8e0e694a 1951 ata_qc_issue(qc);
1da177e4
LT		 1952
1953 VPRINTK("EXIT\n");
2115ea94 1954 return 0;
1da177e4 1955
ae006510 1956early_finish:
2dcb407e 1957 ata_qc_free(qc);
b27dcfb0 1958 cmd->scsi_done(cmd);
ae006510 1959 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1960 return 0;
ae006510
DG		 1961
1962err_did:
1da177e4 1963 ata_qc_free(qc);
ae006510 1964 cmd->result = (DID_ERROR << 16);
b27dcfb0 1965 cmd->scsi_done(cmd);
253b92ec 1966err_mem:
ae006510 1967 DPRINTK("EXIT - internal\n");
2115ea94 1968 return 0;
3dc1d881
TH		 1969
1970defer:
31cc23b3 1971 ata_qc_free(qc);
3dc1d881 1972 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1973 if (rc == ATA_DEFER_LINK)
1974 return SCSI_MLQUEUE_DEVICE_BUSY;
1975 else
1976 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1977}
1978
1979/**
1980 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1981 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1982 * @flags: unsigned long variable to store irq enable status
1983 * @copy_in: copy in from user buffer
1da177e4 1984 *
87340e98 1985 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1986 *
1987 * LOCKING:
87340e98 1988 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1989 *
1990 * RETURNS:
87340e98 1991 * Pointer to response buffer.
1da177e4 1992 */
87340e98
TH		 1993static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1994 unsigned long *flags)
1da177e4 1995{
87340e98 1996 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1997
87340e98
TH		 1998 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1999 if (copy_in)
2000 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2001 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2002 return ata_scsi_rbuf;
1da177e4
LT		 2003}
2004
2005/**
2006 * ata_scsi_rbuf_put - Unmap response buffer.
2007 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 2008 * @copy_out: copy out result
2009 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 2010 *
87340e98
TH		 2011 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2012 * @copy_back is true.
1da177e4
LT		 2013 *
2014 * LOCKING:
87340e98 2015 * Unlocks ata_scsi_rbuf_lock.
1da177e4 2016 */
87340e98
TH		 2017static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2018 unsigned long *flags)
1da177e4 2019{
87340e98
TH		 2020 if (copy_out)
2021 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2022 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2023 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 2024}
2025
2026/**
2027 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2028 * @args: device IDENTIFY data / SCSI command of interest.
2029 * @actor: Callback hook for desired SCSI command simulator
2030 *
2031 * Takes care of the hard work of simulating a SCSI command...
2032 * Mapping the response buffer, calling the command's handler,
2033 * and handling the handler's return value. This return value
2034 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 2035 * completed successfully (0), or not (in which case cmd->result
2036 * and sense buffer are assumed to be set).
1da177e4
LT		 2037 *
2038 * LOCKING:
cca3974e 2039 * spin_lock_irqsave(host lock)
1da177e4 2040 */
f0761be3 2041static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 2042 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 2043{
2044 u8 *rbuf;
87340e98 2045 unsigned int rc;
1da177e4 2046 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 2047 unsigned long flags;
2048
87340e98
TH		 2049 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2050 rc = actor(args, rbuf);
2051 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 2052
ae006510 2053 if (rc == 0)
1da177e4 2054 cmd->result = SAM_STAT_GOOD;
ae006510 2055 args->done(cmd);
1da177e4
LT		 2056}
2057
2058/**
2059 * ata_scsiop_inq_std - Simulate INQUIRY command
2060 * @args: device IDENTIFY data / SCSI command of interest.
2061 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2062 *
2063 * Returns standard device identification data associated
b142eb65 2064 * with non-VPD INQUIRY command output.
1da177e4
LT		 2065 *
2066 * LOCKING:
cca3974e 2067 * spin_lock_irqsave(host lock)
1da177e4 2068 */
87340e98 2069static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2070{
87340e98 2071 const u8 versions[] = {
f9ca5ab8 2072 0x00,
87340e98
TH		 2073 0x60, /* SAM-3 (no version claimed) */
2074
2075 0x03,
2076 0x20, /* SBC-2 (no version claimed) */
2077
2078 0x02,
2079 0x60 /* SPC-3 (no version claimed) */
2080 };
f9ca5ab8
HR		 2081 const u8 versions_zbc[] = {
2082 0x00,
2083 0xA0, /* SAM-5 (no version claimed) */
2084
2085 0x04,
2086 0xC0, /* SBC-3 (no version claimed) */
2087
2088 0x04,
2089 0x60, /* SPC-4 (no version claimed) */
2090
2091 0x60,
2092 0x20, /* ZBC (no version claimed) */
2093 };
2094
1da177e4
LT		 2095 u8 hdr[] = {
2096 TYPE_DISK,
2097 0,
2098 0x5, /* claim SPC-3 version compatibility */
2099 2,
2100 95 - 4
2101 };
2102
87340e98
TH		 2103 VPRINTK("ENTER\n");
2104
8a3e33cf
ML		 2105 /* set scsi removable (RMB) bit per ata bit, or if the
2106 * AHCI port says it's external (Hotplug-capable, eSATA).
2107 */
2108 if (ata_id_removable(args->id) ||
2109 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1da177e4
LT		 2110 hdr[1] |= (1 << 7);
2111
f9ca5ab8
HR		 2112 if (args->dev->class == ATA_DEV_ZAC) {
2113 hdr[0] = TYPE_ZBC;
2114 hdr[2] = 0x6; /* ZBC is defined in SPC-4 */
2115 }
2116
1da177e4 2117 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 2118 memcpy(&rbuf[8], "ATA ", 8);
2119 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
c49a6bf5
KB		 2120
2121 /* From SAT, use last 2 words from fw rev unless they are spaces */
2122 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2123 if (strncmp(&rbuf[32], " ", 4) == 0)
2124 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 2125
87340e98
TH		 2126 if (rbuf[32] == 0 || rbuf[32] == ' ')
2127 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 2128
f9ca5ab8
HR		 2129 if (args->dev->class == ATA_DEV_ZAC)
2130 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2131 else
2132 memcpy(rbuf + 58, versions, sizeof(versions));
1da177e4
LT		 2133
2134 return 0;
2135}
2136
2137/**
b142eb65 2138 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 2139 * @args: device IDENTIFY data / SCSI command of interest.
2140 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2141 *
b142eb65 2142 * Returns list of inquiry VPD pages available.
1da177e4
LT		 2143 *
2144 * LOCKING:
cca3974e 2145 * spin_lock_irqsave(host lock)
1da177e4 2146 */
87340e98 2147static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2148{
2149 const u8 pages[] = {
2150 0x00, /* page 0x00, this page */
2151 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 2152 0x83, /* page 0x83, device ident page */
2153 0x89, /* page 0x89, ata info page */
18f0f978 2154 0xb0, /* page 0xb0, block limits page */
1e9dbc92 2155 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 2156 0xb2, /* page 0xb2, thin provisioning page */
1da177e4 2157 };
1da177e4 2158
87340e98
TH		 2159 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2160 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2161 return 0;
2162}
2163
2164/**
b142eb65 2165 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2166 * @args: device IDENTIFY data / SCSI command of interest.
2167 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2168 *
2169 * Returns ATA device serial number.
2170 *
2171 * LOCKING:
cca3974e 2172 * spin_lock_irqsave(host lock)
1da177e4 2173 */
87340e98 2174static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2175{
2176 const u8 hdr[] = {
2177 0,
2178 0x80, /* this page code */
2179 0,
a0cf733b 2180 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2181 };
1da177e4 2182
87340e98
TH		 2183 memcpy(rbuf, hdr, sizeof(hdr));
2184 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2185 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2186 return 0;
2187}
2188
1da177e4 2189/**
b142eb65 2190 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2191 * @args: device IDENTIFY data / SCSI command of interest.
2192 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2193 *
b142eb65
JG		 2194 * Yields two logical unit device identification designators:
2195 * - vendor specific ASCII containing the ATA serial number
2196 * - SAT defined "t10 vendor id based" containing ASCII vendor
2197 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2198 *
2199 * LOCKING:
cca3974e 2200 * spin_lock_irqsave(host lock)
1da177e4 2201 */
87340e98 2202static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2203{
b142eb65 2204 const int sat_model_serial_desc_len = 68;
87340e98 2205 int num;
1da177e4 2206
b142eb65
JG		 2207 rbuf[1] = 0x83; /* this page code */
2208 num = 4;
2209
87340e98
TH		 2210 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2211 rbuf[num + 0] = 2;
2212 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2213 num += 4;
2214 ata_id_string(args->id, (unsigned char *) rbuf + num,
2215 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2216 num += ATA_ID_SERNO_LEN;
2217
2218 /* SAT defined lu model and serial numbers descriptor */
2219 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2220 rbuf[num + 0] = 2;
2221 rbuf[num + 1] = 1;
2222 rbuf[num + 3] = sat_model_serial_desc_len;
2223 num += 4;
2224 memcpy(rbuf + num, "ATA ", 8);
2225 num += 8;
2226 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2227 ATA_ID_PROD_LEN);
2228 num += ATA_ID_PROD_LEN;
2229 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2230 ATA_ID_SERNO_LEN);
2231 num += ATA_ID_SERNO_LEN;
2232
6b3b9d73
HR		 2233 if (ata_id_has_wwn(args->id)) {
2234 /* SAT defined lu world wide name */
2235 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2236 rbuf[num + 0] = 1;
2237 rbuf[num + 1] = 3;
2238 rbuf[num + 3] = ATA_ID_WWN_LEN;
2239 num += 4;
2240 ata_id_string(args->id, (unsigned char *) rbuf + num,
2241 ATA_ID_WWN, ATA_ID_WWN_LEN);
2242 num += ATA_ID_WWN_LEN;
2243 }
b142eb65 2244 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2245 return 0;
2246}
2247
ad355b46
JG		 2248/**
2249 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2250 * @args: device IDENTIFY data / SCSI command of interest.
2251 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2252 *
2253 * Yields SAT-specified ATA VPD page.
2254 *
2255 * LOCKING:
2256 * spin_lock_irqsave(host lock)
2257 */
87340e98 2258static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2259{
ad355b46 2260 struct ata_taskfile tf;
ad355b46 2261
ad355b46
JG		 2262 memset(&tf, 0, sizeof(tf));
2263
87340e98
TH		 2264 rbuf[1] = 0x89; /* our page code */
2265 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2266 rbuf[3] = (0x238 & 0xff);
ad355b46 2267
87340e98
TH		 2268 memcpy(&rbuf[8], "linux ", 8);
2269 memcpy(&rbuf[16], "libata ", 16);
2270 memcpy(&rbuf[32], DRV_VERSION, 4);
ad355b46
JG		 2271
2272 /* we don't store the ATA device signature, so we fake it */
2273
2274 tf.command = ATA_DRDY; /* really, this is Status reg */
2275 tf.lbal = 0x1;
2276 tf.nsect = 0x1;
2277
87340e98
TH		 2278 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2279 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2280
87340e98 2281 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2282
87340e98 2283 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2284 return 0;
2285}
2286
18f0f978
CH		 2287static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2288{
295124dc 2289 u16 min_io_sectors;
18f0f978
CH		 2290
2291 rbuf[1] = 0xb0;
2292 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2293
2294 /*
2295 * Optimal transfer length granularity.
2296 *
2297 * This is always one physical block, but for disks with a smaller
2298 * logical than physical sector size we need to figure out what the
2299 * latter is.
2300 */
295124dc 2301 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2302 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2303
2304 /*
2305 * Optimal unmap granularity.
2306 *
2307 * The ATA spec doesn't even know about a granularity or alignment
2308 * for the TRIM command. We can leave away most of the unmap related
2309 * VPD page entries, but we have specifify a granularity to signal
2310 * that we support some form of unmap - in thise case via WRITE SAME
2311 * with the unmap bit set.
2312 */
e78db4df 2313 if (ata_id_has_trim(args->id)) {
5f4e2066 2314 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
18f0f978 2315 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2316 }
18f0f978
CH		 2317
2318 return 0;
2319}
2320
1e9dbc92
MW		 2321static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2322{
4bca3286
MP		 2323 int form_factor = ata_id_form_factor(args->id);
2324 int media_rotation_rate = ata_id_rotation_rate(args->id);
2325
1e9dbc92
MW		 2326 rbuf[1] = 0xb1;
2327 rbuf[3] = 0x3c;
4bca3286
MP		 2328 rbuf[4] = media_rotation_rate >> 8;
2329 rbuf[5] = media_rotation_rate;
2330 rbuf[7] = form_factor;
1e9dbc92
MW		 2331
2332 return 0;
2333}
2334
02e0a604
MP		 2335static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2336{
2337 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2338 rbuf[1] = 0xb2;
2339 rbuf[3] = 0x4;
2340 rbuf[5] = 1 << 6; /* TPWS */
2341
2342 return 0;
2343}
2344
1da177e4 2345/**
0cba632b 2346 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2347 * @args: device IDENTIFY data / SCSI command of interest.
2348 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2349 *
2350 * No operation. Simply returns success to caller, to indicate
2351 * that the caller should successfully complete this SCSI command.
2352 *
2353 * LOCKING:
cca3974e 2354 * spin_lock_irqsave(host lock)
1da177e4 2355 */
87340e98 2356static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2357{
2358 VPRINTK("ENTER\n");
2359 return 0;
2360}
2361
6ca8e794
PB		 2362/**
2363 * modecpy - Prepare response for MODE SENSE
2364 * @dest: output buffer
2365 * @src: data being copied
2366 * @n: length of mode page
2367 * @changeable: whether changeable parameters are requested
2368 *
2369 * Generate a generic MODE SENSE page for either current or changeable
2370 * parameters.
2371 *
2372 * LOCKING:
2373 * None.
2374 */
2375static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2376{
2377 if (changeable) {
2378 memcpy(dest, src, 2);
2379 memset(dest + 2, 0, n - 2);
2380 } else {
2381 memcpy(dest, src, n);
2382 }
2383}
2384
1da177e4
LT		 2385/**
2386 * ata_msense_caching - Simulate MODE SENSE caching info page
2387 * @id: device IDENTIFY data
87340e98 2388 * @buf: output buffer
6ca8e794 2389 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2390 *
2391 * Generate a caching info page, which conditionally indicates
2392 * write caching to the SCSI layer, depending on device
2393 * capabilities.
2394 *
2395 * LOCKING:
2396 * None.
2397 */
6ca8e794 2398static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
1da177e4 2399{
6ca8e794 2400 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
1b26d29c 2401 if (changeable || ata_id_wcache_enabled(id))
87340e98 2402 buf[2] |= (1 << 2); /* write cache enable */
6ca8e794 2403 if (!changeable && !ata_id_rahead_enabled(id))
87340e98
TH		 2404 buf[12] |= (1 << 5); /* disable read ahead */
2405 return sizeof(def_cache_mpage);
1da177e4
LT		 2406}
2407
2408/**
2409 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
06dbde5f 2410 * @dev: ATA device of interest
87340e98 2411 * @buf: output buffer
6ca8e794 2412 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2413 *
2414 * Generate a generic MODE SENSE control mode page.
2415 *
2416 * LOCKING:
2417 * None.
2418 */
06dbde5f
HR		 2419static unsigned int ata_msense_ctl_mode(struct ata_device *dev, u8 *buf,
2420 bool changeable)
1da177e4 2421{
6ca8e794 2422 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
06dbde5f
HR		 2423 if (changeable && (dev->flags & ATA_DFLAG_D_SENSE))
2424 buf[2] |= (1 << 2); /* Descriptor sense requested */
00ac37f5 2425 return sizeof(def_control_mpage);
1da177e4
LT		 2426}
2427
2428/**
2429 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2430 * @buf: output buffer
6ca8e794 2431 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2432 *
2433 * Generate a generic MODE SENSE r/w error recovery page.
2434 *
2435 * LOCKING:
2436 * None.
2437 */
6ca8e794 2438static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
1da177e4 2439{
6ca8e794
PB		 2440 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2441 changeable);
00ac37f5 2442 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2443}
2444
48bdc8ec
JA		 2445/*
2446 * We can turn this into a real blacklist if it's needed, for now just
2447 * blacklist any Maxtor BANC1G10 revision firmware
2448 */
2449static int ata_dev_supports_fua(u16 *id)
2450{
a0cf733b 2451 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2452
c3c013a2
JG		 2453 if (!libata_fua)
2454 return 0;
48bdc8ec
JA		 2455 if (!ata_id_has_fua(id))
2456 return 0;
2457
a0cf733b
TH		 2458 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2459 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2460
2e02671d 2461 if (strcmp(model, "Maxtor"))
48bdc8ec 2462 return 1;
2e02671d 2463 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2464 return 1;
2465
2466 return 0; /* blacklisted */
2467}
2468
1da177e4
LT		 2469/**
2470 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2471 * @args: device IDENTIFY data / SCSI command of interest.
2472 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2473 *
00ac37f5
DG		 2474 * Simulate MODE SENSE commands. Assume this is invoked for direct
2475 * access devices (e.g. disks) only. There should be no block
2476 * descriptor for other device types.
1da177e4
LT		 2477 *
2478 * LOCKING:
cca3974e 2479 * spin_lock_irqsave(host lock)
1da177e4 2480 */
87340e98 2481static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2482{
9a3dccc4 2483 struct ata_device *dev = args->dev;
87340e98 2484 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2485 const u8 sat_blk_desc[] = {
2486 0, 0, 0, 0, /* number of blocks: sat unspecified */
2487 0,
2488 0, 0x2, 0x0 /* block length: 512 bytes */
2489 };
2490 u8 pg, spg;
87340e98 2491 unsigned int ebd, page_control, six_byte;
0df10b84 2492 u8 dpofua, bp = 0xff;
bcfc867d 2493 u16 fp;
1da177e4
LT		 2494
2495 VPRINTK("ENTER\n");
2496
2497 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2498 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2499 /*
2500 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2501 */
00ac37f5 2502
1da177e4 2503 page_control = scsicmd[2] >> 6;
ae006510
DG		 2504 switch (page_control) {
2505 case 0: /* current */
6ca8e794
PB		 2506 case 1: /* changeable */
2507 case 2: /* defaults */
ae006510
DG		 2508 break; /* supported */
2509 case 3: /* saved */
2510 goto saving_not_supp;
ae006510 2511 default:
bcfc867d 2512 fp = 2;
0df10b84 2513 bp = 6;
ae006510
DG		 2514 goto invalid_fld;
2515 }
1da177e4 2516
87340e98
TH		 2517 if (six_byte)
2518 p += 4 + (ebd ? 8 : 0);
2519 else
2520 p += 8 + (ebd ? 8 : 0);
1da177e4 2521
00ac37f5
DG		 2522 pg = scsicmd[2] & 0x3f;
2523 spg = scsicmd[3];
2524 /*
2525 * No mode subpages supported (yet) but asking for _all_
2526 * subpages may be valid
2527 */
bcfc867d
HR		 2528 if (spg && (spg != ALL_SUB_MPAGES)) {
2529 fp = 3;
00ac37f5 2530 goto invalid_fld;
bcfc867d 2531 }
00ac37f5
DG		 2532
2533 switch(pg) {
2534 case RW_RECOVERY_MPAGE:
6ca8e794 2535 p += ata_msense_rw_recovery(p, page_control == 1);
1da177e4
LT		 2536 break;
2537
00ac37f5 2538 case CACHE_MPAGE:
6ca8e794 2539 p += ata_msense_caching(args->id, p, page_control == 1);
1da177e4
LT		 2540 break;
2541
87340e98 2542 case CONTROL_MPAGE:
06dbde5f 2543 p += ata_msense_ctl_mode(args->dev, p, page_control == 1);
1da177e4 2544 break;
1da177e4 2545
00ac37f5 2546 case ALL_MPAGES:
6ca8e794
PB		 2547 p += ata_msense_rw_recovery(p, page_control == 1);
2548 p += ata_msense_caching(args->id, p, page_control == 1);
06dbde5f 2549 p += ata_msense_ctl_mode(args->dev, p, page_control == 1);
1da177e4
LT		 2550 break;
2551
2552 default: /* invalid page code */
bcfc867d 2553 fp = 2;
ae006510 2554 goto invalid_fld;
1da177e4
LT		 2555 }
2556
9a3dccc4 2557 dpofua = 0;
f79d409f 2558 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2559 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2560 dpofua = 1 << 4;
2561
1da177e4 2562 if (six_byte) {
87340e98
TH		 2563 rbuf[0] = p - rbuf - 1;
2564 rbuf[2] |= dpofua;
00ac37f5 2565 if (ebd) {
87340e98
TH		 2566 rbuf[3] = sizeof(sat_blk_desc);
2567 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2568 }
1da177e4 2569 } else {
87340e98
TH		 2570 unsigned int output_len = p - rbuf - 2;
2571
1da177e4 2572 rbuf[0] = output_len >> 8;
87340e98
TH		 2573 rbuf[1] = output_len;
2574 rbuf[3] |= dpofua;
00ac37f5 2575 if (ebd) {
87340e98
TH		 2576 rbuf[7] = sizeof(sat_blk_desc);
2577 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2578 }
1da177e4 2579 }
1da177e4 2580 return 0;
ae006510
DG		 2581
2582invalid_fld:
0df10b84 2583 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
ae006510
DG		 2584 return 1;
2585
2586saving_not_supp:
06dbde5f 2587 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
ae006510
DG		 2588 /* "Saving parameters not supported" */
2589 return 1;
1da177e4
LT		 2590}
2591
2592/**
2593 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2594 * @args: device IDENTIFY data / SCSI command of interest.
2595 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2596 *
2597 * Simulate READ CAPACITY commands.
2598 *
2599 * LOCKING:
6a36261e 2600 * None.
1da177e4 2601 */
87340e98 2602static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2603{
61d79a8e
MP		 2604 struct ata_device *dev = args->dev;
2605 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2606 u32 sector_size; /* physical sector size in bytes */
2607 u8 log2_per_phys;
2608 u16 lowest_aligned;
2609
2610 sector_size = ata_id_logical_sector_size(dev->id);
2611 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2612 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2613
2614 VPRINTK("ENTER\n");
2615
1da177e4 2616 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2617 if (last_lba >= 0xffffffffULL)
2618 last_lba = 0xffffffff;
0c144d0d 2619
1da177e4 2620 /* sector count, 32-bit */
87340e98
TH		 2621 rbuf[0] = last_lba >> (8 * 3);
2622 rbuf[1] = last_lba >> (8 * 2);
2623 rbuf[2] = last_lba >> (8 * 1);
2624 rbuf[3] = last_lba;
1da177e4
LT		 2625
2626 /* sector size */
295124dc
GG		 2627 rbuf[4] = sector_size >> (8 * 3);
2628 rbuf[5] = sector_size >> (8 * 2);
2629 rbuf[6] = sector_size >> (8 * 1);
2630 rbuf[7] = sector_size;
1da177e4
LT		 2631 } else {
2632 /* sector count, 64-bit */
87340e98
TH		 2633 rbuf[0] = last_lba >> (8 * 7);
2634 rbuf[1] = last_lba >> (8 * 6);
2635 rbuf[2] = last_lba >> (8 * 5);
2636 rbuf[3] = last_lba >> (8 * 4);
2637 rbuf[4] = last_lba >> (8 * 3);
2638 rbuf[5] = last_lba >> (8 * 2);
2639 rbuf[6] = last_lba >> (8 * 1);
2640 rbuf[7] = last_lba;
1da177e4
LT		 2641
2642 /* sector size */
295124dc
GG		 2643 rbuf[ 8] = sector_size >> (8 * 3);
2644 rbuf[ 9] = sector_size >> (8 * 2);
2645 rbuf[10] = sector_size >> (8 * 1);
2646 rbuf[11] = sector_size;
61d79a8e
MP		 2647
2648 rbuf[12] = 0;
295124dc 2649 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2650 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2651 rbuf[15] = lowest_aligned;
18f0f978 2652
71d126fd
AF		 2653 if (ata_id_has_trim(args->id) &&
2654 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
e61f7d1c 2655 rbuf[14] |= 0x80; /* LBPME */
e78db4df 2656
e61f7d1c
MP		 2657 if (ata_id_has_zero_after_trim(args->id) &&
2658 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2659 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2660 rbuf[14] |= 0x40; /* LBPRZ */
2661 }
e78db4df 2662 }
1da177e4 2663 }
1da177e4
LT		 2664 return 0;
2665}
2666
2667/**
2668 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2669 * @args: device IDENTIFY data / SCSI command of interest.
2670 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2671 *
2672 * Simulate REPORT LUNS command.
2673 *
2674 * LOCKING:
cca3974e 2675 * spin_lock_irqsave(host lock)
1da177e4 2676 */
87340e98 2677static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2678{
2679 VPRINTK("ENTER\n");
2680 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2681
2682 return 0;
2683}
2684
77853bf2 2685static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2686{
74e6c8c3 2687 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2688 /* FIXME: not quite right; we don't want the
2689 * translation of taskfile registers into
2690 * a sense descriptors, since that's only
2691 * correct for ATA, not ATAPI
2692 */
750426aa 2693 ata_gen_passthru_sense(qc);
74e6c8c3 2694 }
a939c963 2695
2aa8f5d6 2696 ata_qc_done(qc);
c6e6e666 2697}
a939c963 2698
c6e6e666
JG		 2699/* is it pointless to prefer PIO for "safety reasons"? */
2700static inline int ata_pio_use_silly(struct ata_port *ap)
2701{
2702 return (ap->flags & ATA_FLAG_PIO_DMA);
2703}
2704
2705static void atapi_request_sense(struct ata_queued_cmd *qc)
2706{
2707 struct ata_port *ap = qc->ap;
2708 struct scsi_cmnd *cmd = qc->scsicmd;
2709
2710 DPRINTK("ATAPI request sense\n");
a939c963 2711
7ccd720d 2712 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2713
127102ae 2714#ifdef CONFIG_ATA_SFF
855d854a
JB		 2715 if (ap->ops->sff_tf_read)
2716 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2717#endif
c6e6e666
JG		 2718
2719 /* fill these in, for the case where they are -not- overwritten */
2720 cmd->sense_buffer[0] = 0x70;
2721 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2722
2723 ata_qc_reinit(qc);
2724
93f8fecb 2725 /* setup sg table and init transfer direction */
cadb7345 2726 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2727 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2728 qc->dma_dir = DMA_FROM_DEVICE;
2729
6e7846e9 2730 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2731 qc->cdb[0] = REQUEST_SENSE;
2732 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2733
2734 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2735 qc->tf.command = ATA_CMD_PACKET;
2736
c6e6e666 2737 if (ata_pio_use_silly(ap)) {
0dc36888 2738 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2739 qc->tf.feature |= ATAPI_PKT_DMA;
2740 } else {
0dc36888 2741 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2742 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2743 qc->tf.lbah = 0;
c6e6e666 2744 }
a939c963
JG		 2745 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2746
c6e6e666 2747 qc->complete_fn = atapi_sense_complete;
a939c963 2748
8e0e694a 2749 ata_qc_issue(qc);
a939c963
JG		 2750
2751 DPRINTK("EXIT\n");
2752}
2753
77853bf2 2754static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2755{
2756 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2757 unsigned int err_mask = qc->err_mask;
1da177e4 2758
a7dac447 2759 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2760
246619da
TH		 2761 /* handle completion from new EH */
2762 if (unlikely(qc->ap->ops->error_handler &&
2763 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2764
2765 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2766 /* FIXME: not quite right; we don't want the
2767 * translation of taskfile registers into a
2768 * sense descriptors, since that's only
2769 * correct for ATA, not ATAPI
2770 */
750426aa 2771 ata_gen_passthru_sense(qc);
246619da
TH		 2772 }
2773
22aac089
TH		 2774 /* SCSI EH automatically locks door if sdev->locked is
2775 * set. Sometimes door lock request continues to
2776 * fail, for example, when no media is present. This
2777 * creates a loop - SCSI EH issues door lock which
2778 * fails and gets invoked again to acquire sense data
2779 * for the failed command.
2780 *
2781 * If door lock fails, always clear sdev->locked to
2782 * avoid this infinite loop.
2a5f07b5
TH		 2783 *
2784 * This may happen before SCSI scan is complete. Make
2785 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2786 */
2a5f07b5 2787 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2788 qc->dev->sdev->locked = 0;
2789
246619da 2790 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2aa8f5d6 2791 ata_qc_done(qc);
246619da
TH		 2792 return;
2793 }
2794
2795 /* successful completion or old EH failure path */
a7dac447 2796 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2797 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2798 atapi_request_sense(qc);
77853bf2 2799 return;
74e6c8c3 2800 } else if (unlikely(err_mask)) {
a7dac447
JG		 2801 /* FIXME: not quite right; we don't want the
2802 * translation of taskfile registers into
2803 * a sense descriptors, since that's only
2804 * correct for ATA, not ATAPI
2805 */
750426aa 2806 ata_gen_passthru_sense(qc);
74e6c8c3 2807 } else {
1da177e4
LT		 2808 u8 *scsicmd = cmd->cmnd;
2809
fd71da46 2810 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2811 unsigned long flags;
87340e98 2812 u8 *buf;
b445c568 2813
87340e98 2814 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2815
2816 /* ATAPI devices typically report zero for their SCSI version,
2817 * and sometimes deviate from the spec WRT response data
2818 * format. If SCSI version is reported as zero like normal,
2819 * then we make the following fixups: 1) Fake MMC-5 version,
2820 * to indicate to the Linux scsi midlayer this is a modern
2821 * device. 2) Ensure response data format / ATAPI information
2822 * are always correct.
a15dbeb4
JG		 2823 */
2824 if (buf[2] == 0) {
2825 buf[2] = 0x5;
2826 buf[3] = 0x32;
2827 }
2828
87340e98 2829 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2830 }
a15dbeb4 2831
1da177e4
LT		 2832 cmd->result = SAM_STAT_GOOD;
2833 }
2834
2aa8f5d6 2835 ata_qc_done(qc);
1da177e4
LT		 2836}
2837/**
2838 * atapi_xlat - Initialize PACKET taskfile
2839 * @qc: command structure to be initialized
1da177e4
LT		 2840 *
2841 * LOCKING:
cca3974e 2842 * spin_lock_irqsave(host lock)
1da177e4
LT		 2843 *
2844 * RETURNS:
2845 * Zero on success, non-zero on failure.
2846 */
ad706991 2847static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2848{
542b1444 2849 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2850 struct ata_device *dev = qc->dev;
542b1444 2851 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2852 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2853 unsigned int nbytes;
1da177e4 2854
2e5704f6
TH		 2855 memset(qc->cdb, 0, dev->cdb_len);
2856 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2857
2858 qc->complete_fn = atapi_qc_complete;
2859
2860 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2861 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2862 qc->tf.flags |= ATA_TFLAG_WRITE;
2863 DPRINTK("direction: write\n");
2864 }
2865
2866 qc->tf.command = ATA_CMD_PACKET;
aacda375 2867 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2868
2869 /* check whether ATAPI DMA is safe */
5895ef9a 2870 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2871 using_pio = 1;
1da177e4 2872
e190222d
TH		 2873 /* Some controller variants snoop this value for Packet
2874 * transfers to do state machine and FIFO management. Thus we
2875 * want to set it properly, and for DMA where it is
2876 * effectively meaningless.
2877 */
aacda375 2878 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2879
e190222d
TH		 2880 /* Most ATAPI devices which honor transfer chunk size don't
2881 * behave according to the spec when odd chunk size which
2882 * matches the transfer length is specified. If the number of
2883 * bytes to transfer is 2n+1. According to the spec, what
2884 * should happen is to indicate that 2n+1 is going to be
2885 * transferred and transfer 2n+2 bytes where the last byte is
2886 * padding.
2887 *
2888 * In practice, this doesn't happen. ATAPI devices first
2889 * indicate and transfer 2n bytes and then indicate and
2890 * transfer 2 bytes where the last byte is padding.
2891 *
2892 * This inconsistency confuses several controllers which
2893 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2894 * These controllers use actual number of transferred bytes to
2895 * update DMA poitner and transfer of 4n+2 bytes make those
2896 * controller push DMA pointer by 4n+4 bytes because SATA data
2897 * FISes are aligned to 4 bytes. This causes data corruption
2898 * and buffer overrun.
2899 *
2900 * Always setting nbytes to even number solves this problem
2901 * because then ATAPI devices don't have to split data at 2n
2902 * boundaries.
2903 */
2904 if (nbytes & 0x1)
2905 nbytes++;
2906
2db78dd3
AC		 2907 qc->tf.lbam = (nbytes & 0xFF);
2908 qc->tf.lbah = (nbytes >> 8);
2909
5895ef9a
TH		 2910 if (nodata)
2911 qc->tf.protocol = ATAPI_PROT_NODATA;
2912 else if (using_pio)
2913 qc->tf.protocol = ATAPI_PROT_PIO;
2914 else {
e00f1ff3 2915 /* DMA data xfer */
0dc36888 2916 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2917 qc->tf.feature |= ATAPI_PKT_DMA;
2918
91163006
TH		 2919 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2920 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2921 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2922 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2923 }
2924
2db78dd3
AC		 2925
2926 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2927 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2928 return 0;
2929}
2930
2dcb407e 2931static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2932{
071f44b1 2933 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2934 if (likely(devno < ata_link_max_devices(&ap->link)))
2935 return &ap->link.device[devno];
2936 } else {
2937 if (likely(devno < ap->nr_pmp_links))
2938 return &ap->pmp_link[devno].device[0];
2939 }
2940
ab5b3a5b
TH		 2941 return NULL;
2942}
2943
2dcb407e
JG		 2944static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2945 const struct scsi_device *scsidev)
ab5b3a5b 2946{
41bda9c9
TH		 2947 int devno;
2948
ab5b3a5b 2949 /* skip commands not addressed to targets we simulate */
071f44b1 2950 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2951 if (unlikely(scsidev->channel || scsidev->lun))
2952 return NULL;
2953 devno = scsidev->id;
2954 } else {
2955 if (unlikely(scsidev->id || scsidev->lun))
2956 return NULL;
2957 devno = scsidev->channel;
2958 }
ab5b3a5b 2959
41bda9c9 2960 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2961}
2962
1da177e4
LT		 2963/**
2964 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2965 * @ap: ATA port to which the device is attached
2966 * @scsidev: SCSI device from which we derive the ATA device
2967 *
2968 * Given various information provided in struct scsi_cmnd,
2969 * map that onto an ATA bus, and using that mapping
2970 * determine which ata_device is associated with the
2971 * SCSI command to be sent.
2972 *
2973 * LOCKING:
cca3974e 2974 * spin_lock_irqsave(host lock)
1da177e4
LT		 2975 *
2976 * RETURNS:
2977 * Associated ATA device, or %NULL if not found.
2978 */
1da177e4 2979static struct ata_device *
057ace5e 2980ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2981{
ab5b3a5b 2982 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2983
2486fa56 2984 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2985 return NULL;
2986
1da177e4
LT		 2987 return dev;
2988}
2989
b095518e
JG		 2990/*
2991 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2992 * @byte1: Byte 1 from pass-thru CDB.
2993 *
2994 * RETURNS:
2995 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2996 */
2997static u8
2998ata_scsi_map_proto(u8 byte1)
2999{
3000 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 3001 case 3: /* Non-data */
3002 return ATA_PROT_NODATA;
3003
3004 case 6: /* DMA */
3005 case 10: /* UDMA Data-in */
3006 case 11: /* UDMA Data-Out */
3007 return ATA_PROT_DMA;
3008
3009 case 4: /* PIO Data-in */
3010 case 5: /* PIO Data-out */
3011 return ATA_PROT_PIO;
3012
ee7fb331
VK		 3013 case 12: /* FPDMA */
3014 return ATA_PROT_NCQ;
3015
2dcb407e
JG		 3016 case 0: /* Hard Reset */
3017 case 1: /* SRST */
3018 case 8: /* Device Diagnostic */
3019 case 9: /* Device Reset */
3020 case 7: /* DMA Queued */
2dcb407e
JG		 3021 case 15: /* Return Response Info */
3022 default: /* Reserved */
3023 break;
b095518e
JG		 3024 }
3025
3026 return ATA_PROT_UNKNOWN;
3027}
3028
3029/**
3030 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3031 * @qc: command structure to be initialized
b095518e
JG		 3032 *
3033 * Handles either 12 or 16-byte versions of the CDB.
3034 *
3035 * RETURNS:
3036 * Zero on success, non-zero on failure.
3037 */
ad706991 3038static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 3039{
3040 struct ata_taskfile *tf = &(qc->tf);
542b1444 3041 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 3042 struct ata_device *dev = qc->dev;
ad706991 3043 const u8 *cdb = scmd->cmnd;
bcfc867d 3044 u16 fp;
b095518e 3045
bcfc867d
HR		 3046 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) {
3047 fp = 1;
9a405257 3048 goto invalid_fld;
bcfc867d 3049 }
8190bdb9 3050
5f8e7f17
VK		 3051 /* enable LBA */
3052 tf->flags |= ATA_TFLAG_LBA;
3053
b095518e
JG		 3054 /*
3055 * 12 and 16 byte CDBs use different offsets to
3056 * provide the various register values.
3057 */
542b1444 3058 if (cdb[0] == ATA_16) {
b095518e
JG		 3059 /*
3060 * 16-byte CDB - may contain extended commands.
3061 *
3062 * If that is the case, copy the upper byte register values.
3063 */
542b1444
TH		 3064 if (cdb[1] & 0x01) {
3065 tf->hob_feature = cdb[3];
3066 tf->hob_nsect = cdb[5];
3067 tf->hob_lbal = cdb[7];
3068 tf->hob_lbam = cdb[9];
3069 tf->hob_lbah = cdb[11];
b095518e
JG		 3070 tf->flags |= ATA_TFLAG_LBA48;
3071 } else
3072 tf->flags &= ~ATA_TFLAG_LBA48;
3073
3074 /*
3075 * Always copy low byte, device and command registers.
3076 */
542b1444
TH		 3077 tf->feature = cdb[4];
3078 tf->nsect = cdb[6];
3079 tf->lbal = cdb[8];
3080 tf->lbam = cdb[10];
3081 tf->lbah = cdb[12];
3082 tf->device = cdb[13];
3083 tf->command = cdb[14];
b095518e
JG		 3084 } else {
3085 /*
3086 * 12-byte CDB - incapable of extended commands.
3087 */
3088 tf->flags &= ~ATA_TFLAG_LBA48;
3089
542b1444
TH		 3090 tf->feature = cdb[3];
3091 tf->nsect = cdb[4];
3092 tf->lbal = cdb[5];
3093 tf->lbam = cdb[6];
3094 tf->lbah = cdb[7];
3095 tf->device = cdb[8];
3096 tf->command = cdb[9];
b095518e 3097 }
fa4453c4 3098
ee7fb331
VK		 3099 /* For NCQ commands with FPDMA protocol, copy the tag value */
3100 if (tf->protocol == ATA_PROT_NCQ)
3101 tf->nsect = qc->tag << 3;
3102
fa4453c4
AL		 3103 /* enforce correct master/slave bit */
3104 tf->device = dev->devno ?
3105 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 3106
bd30add8 3107 switch (tf->command) {
295124dc 3108 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 3109 case ATA_CMD_READ_LONG:
3110 case ATA_CMD_READ_LONG_ONCE:
3111 case ATA_CMD_WRITE_LONG:
3112 case ATA_CMD_WRITE_LONG_ONCE:
bcfc867d
HR		 3113 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3114 fp = 1;
bd30add8 3115 goto invalid_fld;
bcfc867d 3116 }
bd30add8 3117 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 3118 break;
3119
3120 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3121 case ATA_CMD_CFA_WRITE_NE:
3122 case ATA_CMD_CFA_TRANS_SECT:
3123 case ATA_CMD_CFA_WRITE_MULT_NE:
3124 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3125 case ATA_CMD_READ:
3126 case ATA_CMD_READ_EXT:
3127 case ATA_CMD_READ_QUEUED:
3128 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3129 case ATA_CMD_FPDMA_READ:
3130 case ATA_CMD_READ_MULTI:
3131 case ATA_CMD_READ_MULTI_EXT:
3132 case ATA_CMD_PIO_READ:
3133 case ATA_CMD_PIO_READ_EXT:
3134 case ATA_CMD_READ_STREAM_DMA_EXT:
3135 case ATA_CMD_READ_STREAM_EXT:
3136 case ATA_CMD_VERIFY:
3137 case ATA_CMD_VERIFY_EXT:
3138 case ATA_CMD_WRITE:
3139 case ATA_CMD_WRITE_EXT:
3140 case ATA_CMD_WRITE_FUA_EXT:
3141 case ATA_CMD_WRITE_QUEUED:
3142 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3143 case ATA_CMD_FPDMA_WRITE:
3144 case ATA_CMD_WRITE_MULTI:
3145 case ATA_CMD_WRITE_MULTI_EXT:
3146 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3147 case ATA_CMD_PIO_WRITE:
3148 case ATA_CMD_PIO_WRITE_EXT:
3149 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3150 case ATA_CMD_WRITE_STREAM_EXT:
3151 qc->sect_size = scmd->device->sector_size;
3152 break;
3153
3154 /* Everything else uses 512 byte "sectors" */
3155 default:
3156 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 3157 }
3158
3159 /*
3160 * Set flags so that all registers will be written, pass on
3161 * write indication (used for PIO/DMA setup), result TF is
3162 * copied back and we don't whine too much about its failure.
3163 */
bc496ed0 3164 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 3165 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3166 tf->flags |= ATA_TFLAG_WRITE;
3167
3168 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3169
3170 /*
3171 * Set transfer length.
3172 *
3173 * TODO: find out if we need to do more here to
3174 * cover scatter/gather case.
3175 */
3176 ata_qc_set_pc_nbytes(qc);
3177
3178 /* We may not issue DMA commands if no DMA mode is set */
bcfc867d
HR		 3179 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3180 fp = 1;
bd30add8 3181 goto invalid_fld;
bcfc867d 3182 }
bd30add8 3183
1dce589c 3184 /* sanity check for pio multi commands */
bcfc867d
HR		 3185 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3186 fp = 1;
1dce589c 3187 goto invalid_fld;
bcfc867d 3188 }
1dce589c
AL		 3189
3190 if (is_multi_taskfile(tf)) {
3191 unsigned int multi_count = 1 << (cdb[1] >> 5);
3192
3193 /* compare the passed through multi_count
3194 * with the cached multi_count of libata
3195 */
3196 if (multi_count != dev->multi_count)
a9a79dfe
JP		 3197 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3198 multi_count);
d26fc955 3199 }
1dce589c 3200
b095518e
JG		 3201 /*
3202 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3203 * SET_FEATURES - XFER MODE must be preceded/succeeded
3204 * by an update to hardware-specific registers for each
3205 * controller (i.e. the reason for ->set_piomode(),
3206 * ->set_dmamode(), and ->post_set_mode() hooks).
3207 */
bd30add8 3208 if (tf->command == ATA_CMD_SET_FEATURES &&
bcfc867d
HR		 3209 tf->feature == SETFEATURES_XFER) {
3210 fp = (cdb[0] == ATA_16) ? 4 : 3;
9a405257 3211 goto invalid_fld;
bcfc867d 3212 }
b095518e
JG		 3213
3214 /*
bd30add8
TH		 3215 * Filter TPM commands by default. These provide an
3216 * essentially uncontrolled encrypted "back door" between
3217 * applications and the disk. Set libata.allow_tpm=1 if you
3218 * have a real reason for wanting to use them. This ensures
3219 * that installed software cannot easily mess stuff up without
3220 * user intent. DVR type users will probably ship with this enabled
3221 * for movie content management.
b095518e 3222 *
bd30add8
TH		 3223 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3224 * for this and should do in future but that it is not sufficient as
3225 * DCS is an optional feature set. Thus we also do the software filter
3226 * so that we comply with the TC consortium stated goal that the user
3227 * can turn off TC features of their system.
b095518e 3228 */
bcfc867d
HR		 3229 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3230 fp = (cdb[0] == ATA_16) ? 14 : 9;
bd30add8 3231 goto invalid_fld;
bcfc867d 3232 }
e61e0672 3233
b095518e 3234 return 0;
9a405257
TH		 3235
3236 invalid_fld:
0df10b84 3237 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
9a405257 3238 return 1;
b095518e
JG		 3239}
3240
18f0f978
CH		 3241static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3242{
3243 struct ata_taskfile *tf = &qc->tf;
3244 struct scsi_cmnd *scmd = qc->scsicmd;
3245 struct ata_device *dev = qc->dev;
3246 const u8 *cdb = scmd->cmnd;
3247 u64 block;
3248 u32 n_block;
3249 u32 size;
3250 void *buf;
bcfc867d 3251 u16 fp;
0df10b84 3252 u8 bp = 0xff;
18f0f978
CH		 3253
3254 /* we may not issue DMA commands if no DMA mode is set */
3255 if (unlikely(!dev->dma_mode))
bcfc867d 3256 goto invalid_opcode;
18f0f978 3257
bcfc867d
HR		 3258 if (unlikely(scmd->cmd_len < 16)) {
3259 fp = 15;
18f0f978 3260 goto invalid_fld;
bcfc867d 3261 }
18f0f978
CH		 3262 scsi_16_lba_len(cdb, &block, &n_block);
3263
3264 /* for now we only support WRITE SAME with the unmap bit set */
bcfc867d
HR		 3265 if (unlikely(!(cdb[1] & 0x8))) {
3266 fp = 1;
0df10b84 3267 bp = 3;
18f0f978 3268 goto invalid_fld;
bcfc867d 3269 }
18f0f978
CH		 3270
3271 /*
3272 * WRITE SAME always has a sector sized buffer as payload, this
3273 * should never be a multiple entry S/G list.
3274 */
3275 if (!scsi_sg_count(scmd))
bcfc867d 3276 goto invalid_param_len;
18f0f978
CH		 3277
3278 buf = page_address(sg_page(scsi_sglist(scmd)));
d0634c4a 3279 size = ata_set_lba_range_entries(buf, 512, block, n_block);
18f0f978 3280
87fb6c31
MC		 3281 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3282 /* Newer devices support queued TRIM commands */
3283 tf->protocol = ATA_PROT_NCQ;
3284 tf->command = ATA_CMD_FPDMA_SEND;
3285 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3286 tf->nsect = qc->tag << 3;
3287 tf->hob_feature = (size / 512) >> 8;
3288 tf->feature = size / 512;
3289
3290 tf->auxiliary = 1;
3291 } else {
3292 tf->protocol = ATA_PROT_DMA;
3293 tf->hob_feature = 0;
3294 tf->feature = ATA_DSM_TRIM;
3295 tf->hob_nsect = (size / 512) >> 8;
3296 tf->nsect = size / 512;
3297 tf->command = ATA_CMD_DSM;
3298 }
3299
18f0f978
CH		 3300 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3301 ATA_TFLAG_WRITE;
3302
3303 ata_qc_set_pc_nbytes(qc);
3304
3305 return 0;
3306
bcfc867d 3307invalid_fld:
0df10b84 3308 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
bcfc867d
HR		 3309 return 1;
3310invalid_param_len:
3311 /* "Parameter list length error" */
3312 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3313 return 1;
3314invalid_opcode:
3315 /* "Invalid command operation code" */
3316 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
18f0f978
CH		 3317 return 1;
3318}
3319
1b26d29c
PB		 3320/**
3321 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3322 * @qc: Storage for translated ATA taskfile
3323 * @buf: input buffer
3324 * @len: number of valid bytes in the input buffer
7780081c 3325 * @fp: out parameter for the failed field on error
1b26d29c
PB		 3326 *
3327 * Prepare a taskfile to modify caching information for the device.
3328 *
3329 * LOCKING:
3330 * None.
3331 */
3332static int ata_mselect_caching(struct ata_queued_cmd *qc,
7780081c 3333 const u8 *buf, int len, u16 *fp)
1b26d29c
PB		 3334{
3335 struct ata_taskfile *tf = &qc->tf;
3336 struct ata_device *dev = qc->dev;
3337 char mpage[CACHE_MPAGE_LEN];
3338 u8 wce;
7780081c 3339 int i;
1b26d29c
PB		 3340
3341 /*
3342 * The first two bytes of def_cache_mpage are a header, so offsets
3343 * in mpage are off by 2 compared to buf. Same for len.
3344 */
3345
7780081c
HR		 3346 if (len != CACHE_MPAGE_LEN - 2) {
3347 if (len < CACHE_MPAGE_LEN - 2)
3348 *fp = len;
3349 else
3350 *fp = CACHE_MPAGE_LEN - 2;
1b26d29c 3351 return -EINVAL;
7780081c 3352 }
1b26d29c
PB		 3353
3354 wce = buf[0] & (1 << 2);
3355
3356 /*
3357 * Check that read-only bits are not modified.
3358 */
3359 ata_msense_caching(dev->id, mpage, false);
7780081c
HR		 3360 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3361 if (i == 0)
3362 continue;
3363 if (mpage[i + 2] != buf[i]) {
3364 *fp = i;
3365 return -EINVAL;
3366 }
3367 }
1b26d29c
PB		 3368
3369 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3370 tf->protocol = ATA_PROT_NODATA;
3371 tf->nsect = 0;
3372 tf->command = ATA_CMD_SET_FEATURES;
3373 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3374 return 0;
3375}
3376
06dbde5f
HR		 3377/**
3378 * ata_mselect_control - Simulate MODE SELECT for control page
3379 * @qc: Storage for translated ATA taskfile
3380 * @buf: input buffer
3381 * @len: number of valid bytes in the input buffer
7780081c 3382 * @fp: out parameter for the failed field on error
06dbde5f
HR		 3383 *
3384 * Prepare a taskfile to modify caching information for the device.
3385 *
3386 * LOCKING:
3387 * None.
3388 */
3389static int ata_mselect_control(struct ata_queued_cmd *qc,
7780081c 3390 const u8 *buf, int len, u16 *fp)
06dbde5f
HR		 3391{
3392 struct ata_device *dev = qc->dev;
3393 char mpage[CONTROL_MPAGE_LEN];
3394 u8 d_sense;
7780081c 3395 int i;
06dbde5f
HR		 3396
3397 /*
3398 * The first two bytes of def_control_mpage are a header, so offsets
3399 * in mpage are off by 2 compared to buf. Same for len.
3400 */
3401
7780081c
HR		 3402 if (len != CONTROL_MPAGE_LEN - 2) {
3403 if (len < CONTROL_MPAGE_LEN - 2)
3404 *fp = len;
3405 else
3406 *fp = CONTROL_MPAGE_LEN - 2;
06dbde5f 3407 return -EINVAL;
7780081c 3408 }
06dbde5f
HR		 3409
3410 d_sense = buf[0] & (1 << 2);
3411
3412 /*
3413 * Check that read-only bits are not modified.
3414 */
3415 ata_msense_ctl_mode(dev, mpage, false);
7780081c
HR		 3416 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3417 if (i == 0)
3418 continue;
3419 if (mpage[2 + i] != buf[i]) {
3420 *fp = i;
3421 return -EINVAL;
3422 }
3423 }
06dbde5f
HR		 3424 if (d_sense & (1 << 2))
3425 dev->flags |= ATA_DFLAG_D_SENSE;
3426 else
3427 dev->flags &= ~ATA_DFLAG_D_SENSE;
3428 qc->scsicmd->result = SAM_STAT_GOOD;
3429 qc->scsicmd->scsi_done(qc->scsicmd);
3430 return 0;
3431}
3432
1b26d29c
PB		 3433/**
3434 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3435 * @qc: Storage for translated ATA taskfile
3436 *
3437 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3438 * Assume this is invoked for direct access devices (e.g. disks) only.
3439 * There should be no block descriptor for other device types.
3440 *
3441 * LOCKING:
3442 * spin_lock_irqsave(host lock)
3443 */
3444static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3445{
3446 struct scsi_cmnd *scmd = qc->scsicmd;
3447 const u8 *cdb = scmd->cmnd;
3448 const u8 *p;
3449 u8 pg, spg;
3450 unsigned six_byte, pg_len, hdr_len, bd_len;
3451 int len;
7780081c
HR		 3452 u16 fp = (u16)-1;
3453 u8 bp = 0xff;
1b26d29c
PB		 3454
3455 VPRINTK("ENTER\n");
3456
3457 six_byte = (cdb[0] == MODE_SELECT);
3458 if (six_byte) {
bcfc867d
HR		 3459 if (scmd->cmd_len < 5) {
3460 fp = 4;
1b26d29c 3461 goto invalid_fld;
bcfc867d 3462 }
1b26d29c
PB		 3463
3464 len = cdb[4];
3465 hdr_len = 4;
3466 } else {
bcfc867d
HR		 3467 if (scmd->cmd_len < 9) {
3468 fp = 8;
1b26d29c 3469 goto invalid_fld;
bcfc867d 3470 }
1b26d29c
PB		 3471
3472 len = (cdb[7] << 8) + cdb[8];
3473 hdr_len = 8;
3474 }
3475
3476 /* We only support PF=1, SP=0. */
bcfc867d
HR		 3477 if ((cdb[1] & 0x11) != 0x10) {
3478 fp = 1;
0df10b84 3479 bp = (cdb[1] & 0x01) ? 1 : 5;
1b26d29c 3480 goto invalid_fld;
bcfc867d 3481 }
1b26d29c
PB		 3482
3483 /* Test early for possible overrun. */
3484 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3485 goto invalid_param_len;
3486
3487 p = page_address(sg_page(scsi_sglist(scmd)));
3488
3489 /* Move past header and block descriptors. */
3490 if (len < hdr_len)
3491 goto invalid_param_len;
3492
3493 if (six_byte)
3494 bd_len = p[3];
3495 else
3496 bd_len = (p[6] << 8) + p[7];
3497
3498 len -= hdr_len;
3499 p += hdr_len;
3500 if (len < bd_len)
3501 goto invalid_param_len;
7780081c
HR		 3502 if (bd_len != 0 && bd_len != 8) {
3503 fp = (six_byte) ? 3 : 6;
3504 fp += bd_len + hdr_len;
1b26d29c 3505 goto invalid_param;
7780081c 3506 }
1b26d29c
PB		 3507
3508 len -= bd_len;
3509 p += bd_len;
3510 if (len == 0)
3511 goto skip;
3512
3513 /* Parse both possible formats for the mode page headers. */
3514 pg = p[0] & 0x3f;
3515 if (p[0] & 0x40) {
3516 if (len < 4)
3517 goto invalid_param_len;
3518
3519 spg = p[1];
3520 pg_len = (p[2] << 8) | p[3];
3521 p += 4;
3522 len -= 4;
3523 } else {
3524 if (len < 2)
3525 goto invalid_param_len;
3526
3527 spg = 0;
3528 pg_len = p[1];
3529 p += 2;
3530 len -= 2;
3531 }
3532
3533 /*
3534 * No mode subpages supported (yet) but asking for _all_
3535 * subpages may be valid
3536 */
7780081c
HR		 3537 if (spg && (spg != ALL_SUB_MPAGES)) {
3538 fp = (p[0] & 0x40) ? 1 : 0;
3539 fp += hdr_len + bd_len;
1b26d29c 3540 goto invalid_param;
7780081c 3541 }
1b26d29c
PB		 3542 if (pg_len > len)
3543 goto invalid_param_len;
3544
3545 switch (pg) {
3546 case CACHE_MPAGE:
7780081c
HR		 3547 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
3548 fp += hdr_len + bd_len;
1b26d29c 3549 goto invalid_param;
7780081c 3550 }
1b26d29c 3551 break;
06dbde5f 3552 case CONTROL_MPAGE:
7780081c
HR		 3553 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
3554 fp += hdr_len + bd_len;
06dbde5f 3555 goto invalid_param;
7780081c 3556 }
06dbde5f 3557 break;
1b26d29c 3558 default: /* invalid page code */
7780081c 3559 fp = bd_len + hdr_len;
1b26d29c
PB		 3560 goto invalid_param;
3561 }
3562
3563 /*
3564 * Only one page has changeable data, so we only support setting one
3565 * page at a time.
3566 */
3567 if (len > pg_len)
3568 goto invalid_param;
3569
3570 return 0;
3571
3572 invalid_fld:
0df10b84 3573 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1b26d29c
PB		 3574 return 1;
3575
3576 invalid_param:
7780081c 3577 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
1b26d29c
PB		 3578 return 1;
3579
3580 invalid_param_len:
3581 /* "Parameter list length error" */
06dbde5f 3582 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
1b26d29c
PB		 3583 return 1;
3584
3585 skip:
3586 scmd->result = SAM_STAT_GOOD;
3587 return 1;
3588}
3589
1da177e4
LT		 3590/**
3591 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3592 * @dev: ATA device
3593 * @cmd: SCSI command opcode to consider
3594 *
3595 * Look up the SCSI command given, and determine whether the
3596 * SCSI command is to be translated or simulated.
3597 *
3598 * RETURNS:
3599 * Pointer to translation function if possible, %NULL if not.
3600 */
3601
3602static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3603{
3604 switch (cmd) {
3605 case READ_6:
3606 case READ_10:
3607 case READ_16:
3608
3609 case WRITE_6:
3610 case WRITE_10:
3611 case WRITE_16:
3612 return ata_scsi_rw_xlat;
3613
0cdd6eb7 3614 case WRITE_SAME_16:
18f0f978
CH		 3615 return ata_scsi_write_same_xlat;
3616
1da177e4
LT		 3617 case SYNCHRONIZE_CACHE:
3618 if (ata_try_flush_cache(dev))
3619 return ata_scsi_flush_xlat;
3620 break;
3621
3622 case VERIFY:
3623 case VERIFY_16:
3624 return ata_scsi_verify_xlat;
b095518e
JG		 3625
3626 case ATA_12:
3627 case ATA_16:
3628 return ata_scsi_pass_thru;
da61396d 3629
1b26d29c
PB		 3630 case MODE_SELECT:
3631 case MODE_SELECT_10:
3632 return ata_scsi_mode_select_xlat;
3633 break;
3634
972dcafb
DG		 3635 case START_STOP:
3636 return ata_scsi_start_stop_xlat;
1da177e4
LT		 3637 }
3638
3639 return NULL;
3640}
3641
3642/**
3643 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3644 * @ap: ATA port to which the command was being sent
3645 * @cmd: SCSI command to dump
3646 *
3647 * Prints the contents of a SCSI command via printk().
3648 */
3649
3650static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3651 struct scsi_cmnd *cmd)
3652{
3653#ifdef ATA_DEBUG
3654 struct scsi_device *scsidev = cmd->device;
3655 u8 *scsicmd = cmd->cmnd;
3656
3657 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 3658 ap->print_id,
1da177e4
LT		 3659 scsidev->channel, scsidev->id, scsidev->lun,
3660 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3661 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3662 scsicmd[8]);
3663#endif
3664}
3665
542b1444 3666static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 3667 struct ata_device *dev)
eb3f0f9c 3668{
baf4fdfa
ML		 3669 u8 scsi_op = scmd->cmnd[0];
3670 ata_xlat_func_t xlat_func;
2115ea94
TH		 3671 int rc = 0;
3672
9162c657 3673 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
baf4fdfa
ML		 3674 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3675 goto bad_cdb_len;
eb3f0f9c 3676
baf4fdfa
ML		 3677 xlat_func = ata_get_xlat_func(dev, scsi_op);
3678 } else {
3679 if (unlikely(!scmd->cmd_len))
3680 goto bad_cdb_len;
3681
3682 xlat_func = NULL;
3683 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3684 /* relay SCSI command to ATAPI device */
607126c2
ML		 3685 int len = COMMAND_SIZE(scsi_op);
3686 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3687 goto bad_cdb_len;
3688
3689 xlat_func = atapi_xlat;
3690 } else {
3691 /* ATA_16 passthru, treat as an ATA command */
3692 if (unlikely(scmd->cmd_len > 16))
3693 goto bad_cdb_len;
3694
3695 xlat_func = ata_get_xlat_func(dev, scsi_op);
3696 }
3697 }
3698
3699 if (xlat_func)
b27dcfb0 3700 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 3701 else
b27dcfb0 3702 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 3703
3704 return rc;
baf4fdfa
ML		 3705
3706 bad_cdb_len:
3707 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3708 scmd->cmd_len, scsi_op, dev->cdb_len);
3709 scmd->result = DID_ERROR << 16;
b27dcfb0 3710 scmd->scsi_done(scmd);
baf4fdfa 3711 return 0;
eb3f0f9c
BK		 3712}
3713
1da177e4
LT		 3714/**
3715 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 3716 * @shost: SCSI host of command to be sent
1da177e4 3717 * @cmd: SCSI command to be sent
1da177e4
LT		 3718 *
3719 * In some cases, this function translates SCSI commands into
3720 * ATA taskfiles, and queues the taskfiles to be sent to
3721 * hardware. In other cases, this function simulates a
3722 * SCSI device by evaluating and responding to certain
3723 * SCSI commands. This creates the overall effect of
3724 * ATA and ATAPI devices appearing as SCSI devices.
3725 *
3726 * LOCKING:
23e701e6 3727 * ATA host lock
1da177e4
LT		 3728 *
3729 * RETURNS:
2115ea94
TH		 3730 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3731 * 0 otherwise.
1da177e4 3732 */
23e701e6 3733int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 3734{
3735 struct ata_port *ap;
3736 struct ata_device *dev;
3737 struct scsi_device *scsidev = cmd->device;
2115ea94 3738 int rc = 0;
23e701e6 3739 unsigned long irq_flags;
1da177e4 3740
35bb94b1 3741 ap = ata_shost_to_port(shost);
005a5a06 3742
23e701e6 3743 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 3744
3745 ata_scsi_dump_cdb(ap, cmd);
3746
3747 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3748 if (likely(dev))
b27dcfb0 3749 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 3750 else {
1da177e4 3751 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 3752 cmd->scsi_done(cmd);
1da177e4
LT		 3753 }
3754
23e701e6
JG		 3755 spin_unlock_irqrestore(ap->lock, irq_flags);
3756
2115ea94 3757 return rc;
1da177e4
LT		 3758}
3759
3760/**
3761 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3762 * @dev: the target device
1da177e4 3763 * @cmd: SCSI command being sent to device.
1da177e4
LT		 3764 *
3765 * Interprets and directly executes a select list of SCSI commands
3766 * that can be handled internally.
3767 *
3768 * LOCKING:
cca3974e 3769 * spin_lock_irqsave(host lock)
1da177e4
LT		 3770 */
3771
b27dcfb0 3772void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 3773{
3774 struct ata_scsi_args args;
057ace5e 3775 const u8 *scsicmd = cmd->cmnd;
45394145 3776 u8 tmp8;
1da177e4 3777
9a3dccc4
TH		 3778 args.dev = dev;
3779 args.id = dev->id;
1da177e4 3780 args.cmd = cmd;
b27dcfb0 3781 args.done = cmd->scsi_done;
1da177e4
LT		 3782
3783 switch(scsicmd[0]) {
2dcb407e
JG		 3784 /* TODO: worth improving? */
3785 case FORMAT_UNIT:
bcfc867d 3786 ata_scsi_invalid_field(dev, cmd, 0);
2dcb407e
JG		 3787 break;
3788
3789 case INQUIRY:
bcfc867d
HR		 3790 if (scsicmd[1] & 2) /* is CmdDt set? */
3791 ata_scsi_invalid_field(dev, cmd, 1);
2dcb407e
JG		 3792 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3793 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3794 else switch (scsicmd[2]) {
3795 case 0x00:
3796 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3797 break;
2dcb407e
JG		 3798 case 0x80:
3799 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3800 break;
2dcb407e
JG		 3801 case 0x83:
3802 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3803 break;
2dcb407e
JG		 3804 case 0x89:
3805 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3806 break;
18f0f978
CH		 3807 case 0xb0:
3808 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3809 break;
1e9dbc92
MW		 3810 case 0xb1:
3811 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3812 break;
02e0a604
MP		 3813 case 0xb2:
3814 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3815 break;
2dcb407e 3816 default:
bcfc867d 3817 ata_scsi_invalid_field(dev, cmd, 2);
1da177e4 3818 break;
2dcb407e
JG		 3819 }
3820 break;
3821
3822 case MODE_SENSE:
3823 case MODE_SENSE_10:
3824 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3825 break;
3826
2dcb407e
JG		 3827 case READ_CAPACITY:
3828 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3829 break;
3830
eb846d9f 3831 case SERVICE_ACTION_IN_16:
2dcb407e 3832 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3833 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 3834 else
bcfc867d 3835 ata_scsi_invalid_field(dev, cmd, 1);
2dcb407e 3836 break;
1da177e4 3837
2dcb407e
JG		 3838 case REPORT_LUNS:
3839 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3840 break;
1da177e4 3841
2dcb407e 3842 case REQUEST_SENSE:
06dbde5f 3843 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
2dcb407e 3844 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 3845 cmd->scsi_done(cmd);
2dcb407e 3846 break;
1da177e4 3847
2dcb407e
JG		 3848 /* if we reach this, then writeback caching is disabled,
3849 * turning this into a no-op.
3850 */
3851 case SYNCHRONIZE_CACHE:
3852 /* fall through */
3853
3854 /* no-op's, complete with success */
3855 case REZERO_UNIT:
3856 case SEEK_6:
3857 case SEEK_10:
3858 case TEST_UNIT_READY:
3859 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3860 break;
45394145 3861
2dcb407e
JG		 3862 case SEND_DIAGNOSTIC:
3863 tmp8 = scsicmd[1] & ~(1 << 3);
3864 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3865 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 3866 else
bcfc867d 3867 ata_scsi_invalid_field(dev, cmd, 1);
2dcb407e 3868 break;
1da177e4 3869
2dcb407e
JG		 3870 /* all other commands */
3871 default:
06dbde5f 3872 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2dcb407e 3873 /* "Invalid command operation code" */
b27dcfb0 3874 cmd->scsi_done(cmd);
2dcb407e 3875 break;
1da177e4
LT		 3876 }
3877}
3878
f3187195
TH		 3879int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3880{
3881 int i, rc;
3882
3883 for (i = 0; i < host->n_ports; i++) {
3884 struct ata_port *ap = host->ports[i];
3885 struct Scsi_Host *shost;
3886
3887 rc = -ENOMEM;
3888 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3889 if (!shost)
3890 goto err_alloc;
3891
9ee4f393 3892 shost->eh_noresume = 1;
f3187195
TH		 3893 *(struct ata_port **)&shost->hostdata[0] = ap;
3894 ap->scsi_host = shost;
3895
d9027470 3896 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 3897 shost->unique_id = ap->print_id;
3898 shost->max_id = 16;
3899 shost->max_lun = 1;
3900 shost->max_channel = 1;
3901 shost->max_cmd_len = 16;
54b2b50c 3902 shost->no_write_same = 1;
f3187195 3903
31cc23b3
TH		 3904 /* Schedule policy is determined by ->qc_defer()
3905 * callback and it needs to see every deferred qc.
3906 * Set host_blocked to 1 to prevent SCSI midlayer from
3907 * automatically deferring requests.
3908 */
3909 shost->max_host_blocked = 1;
3910
f8fc75dc
LM		 3911 rc = scsi_add_host_with_dma(ap->scsi_host,
3912 &ap->tdev, ap->host->dev);
f3187195
TH		 3913 if (rc)
3914 goto err_add;
3915 }
3916
3917 return 0;
3918
3919 err_add:
3920 scsi_host_put(host->ports[i]->scsi_host);
3921 err_alloc:
3922 while (--i >= 0) {
3923 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3924
3925 scsi_remove_host(shost);
3926 scsi_host_put(shost);
3927 }
3928 return rc;
3929}
3930
1ae46317 3931void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3932{
1ae46317
TH		 3933 int tries = 5;
3934 struct ata_device *last_failed_dev = NULL;
41bda9c9 3935 struct ata_link *link;
1ae46317 3936 struct ata_device *dev;
644dd0cc 3937
1ae46317 3938 repeat:
1eca4365
TH		 3939 ata_for_each_link(link, ap, EDGE) {
3940 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3941 struct scsi_device *sdev;
3942 int channel = 0, id = 0;
3edebac4 3943
1eca4365 3944 if (dev->sdev)
41bda9c9 3945 continue;
3f19ee8c 3946
41bda9c9
TH		 3947 if (ata_is_host_link(link))
3948 id = dev->devno;
3949 else
3950 channel = link->pmp;
3951
3952 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3953 NULL);
3954 if (!IS_ERR(sdev)) {
3955 dev->sdev = sdev;
3956 scsi_device_put(sdev);
295124dc
GG		 3957 } else {
3958 dev->sdev = NULL;
41bda9c9 3959 }
3edebac4 3960 }
3f19ee8c 3961 }
1ae46317
TH		 3962
3963 /* If we scanned while EH was in progress or allocation
3964 * failure occurred, scan would have failed silently. Check
3965 * whether all devices are attached.
3966 */
1eca4365
TH		 3967 ata_for_each_link(link, ap, EDGE) {
3968 ata_for_each_dev(dev, link, ENABLED) {
3969 if (!dev->sdev)
41bda9c9
TH		 3970 goto exit_loop;
3971 }
1ae46317 3972 }
41bda9c9
TH		 3973 exit_loop:
3974 if (!link)
1ae46317
TH		 3975 return;
3976
3977 /* we're missing some SCSI devices */
3978 if (sync) {
3979 /* If caller requested synchrnous scan && we've made
3980 * any progress, sleep briefly and repeat.
3981 */
3982 if (dev != last_failed_dev) {
3983 msleep(100);
3984 last_failed_dev = dev;
3985 goto repeat;
3986 }
3987
3988 /* We might be failing to detect boot device, give it
3989 * a few more chances.
3990 */
3991 if (--tries) {
3992 msleep(100);
3993 goto repeat;
3994 }
3995
a9a79dfe
JP		 3996 ata_port_err(ap,
3997 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 3998 }
3999
ad72cf98 4000 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 4001 round_jiffies_relative(HZ));
644dd0cc 4002}
0ea035a3
TH		 4003
4004/**
4005 * ata_scsi_offline_dev - offline attached SCSI device
4006 * @dev: ATA device to offline attached SCSI device for
4007 *
4008 * This function is called from ata_eh_hotplug() and responsible
4009 * for taking the SCSI device attached to @dev offline. This
cca3974e 4010 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 4011 * against clearing.
4012 *
4013 * LOCKING:
cca3974e 4014 * spin_lock_irqsave(host lock)
0ea035a3
TH		 4015 *
4016 * RETURNS:
4017 * 1 if attached SCSI device exists, 0 otherwise.
4018 */
4019int ata_scsi_offline_dev(struct ata_device *dev)
4020{
4021 if (dev->sdev) {
4022 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4023 return 1;
4024 }
4025 return 0;
4026}
580b2102
TH		 4027
4028/**
4029 * ata_scsi_remove_dev - remove attached SCSI device
4030 * @dev: ATA device to remove attached SCSI device for
4031 *
4032 * This function is called from ata_eh_scsi_hotplug() and
4033 * responsible for removing the SCSI device attached to @dev.
4034 *
4035 * LOCKING:
4036 * Kernel thread context (may sleep).
4037 */
4038static void ata_scsi_remove_dev(struct ata_device *dev)
4039{
9af5c9c9 4040 struct ata_port *ap = dev->link->ap;
580b2102
TH		 4041 struct scsi_device *sdev;
4042 unsigned long flags;
4043
4044 /* Alas, we need to grab scan_mutex to ensure SCSI device
4045 * state doesn't change underneath us and thus
4046 * scsi_device_get() always succeeds. The mutex locking can
4047 * be removed if there is __scsi_device_get() interface which
4048 * increments reference counts regardless of device state.
4049 */
cca3974e 4050 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 4051 spin_lock_irqsave(ap->lock, flags);
580b2102 4052
cca3974e 4053 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 4054 sdev = dev->sdev;
4055 dev->sdev = NULL;
4056
4057 if (sdev) {
4058 /* If user initiated unplug races with us, sdev can go
cca3974e 4059 * away underneath us after the host lock and
580b2102
TH		 4060 * scan_mutex are released. Hold onto it.
4061 */
4062 if (scsi_device_get(sdev) == 0) {
4063 /* The following ensures the attached sdev is
4064 * offline on return from ata_scsi_offline_dev()
4065 * regardless it wins or loses the race
4066 * against this function.
4067 */
4068 scsi_device_set_state(sdev, SDEV_OFFLINE);
4069 } else {
4070 WARN_ON(1);
4071 sdev = NULL;
4072 }
4073 }
4074
ba6a1308 4075 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 4076 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 4077
4078 if (sdev) {
a9a79dfe
JP		 4079 ata_dev_info(dev, "detaching (SCSI %s)\n",
4080 dev_name(&sdev->sdev_gendev));
580b2102
TH		 4081
4082 scsi_remove_device(sdev);
4083 scsi_device_put(sdev);
4084 }
4085}
4086
41bda9c9
TH		 4087static void ata_scsi_handle_link_detach(struct ata_link *link)
4088{
4089 struct ata_port *ap = link->ap;
4090 struct ata_device *dev;
4091
1eca4365 4092 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 4093 unsigned long flags;
4094
4095 if (!(dev->flags & ATA_DFLAG_DETACHED))
4096 continue;
4097
4098 spin_lock_irqsave(ap->lock, flags);
4099 dev->flags &= ~ATA_DFLAG_DETACHED;
4100 spin_unlock_irqrestore(ap->lock, flags);
4101
f1bc1e4c
AL		 4102 if (zpodd_dev_enabled(dev))
4103 zpodd_exit(dev);
4104
41bda9c9
TH		 4105 ata_scsi_remove_dev(dev);
4106 }
4107}
4108
2f294968
KCA		 4109/**
4110 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 4111 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 4112 *
4113 * Tell the block layer to send a media change notification
4114 * event.
4115 *
4116 * LOCKING:
854c73a2 4117 * spin_lock_irqsave(host lock)
2f294968 4118 */
854c73a2 4119void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 4120{
854c73a2 4121 if (dev->sdev)
f26792d5
JG		 4122 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4123 GFP_ATOMIC);
2f294968 4124}
2f294968 4125
580b2102
TH		 4126/**
4127 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 4128 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 4129 *
4130 * Perform SCSI part of hotplug. It's executed from a separate
4131 * workqueue after EH completes. This is necessary because SCSI
4132 * hot plugging requires working EH and hot unplugging is
4133 * synchronized with hot plugging with a mutex.
4134 *
4135 * LOCKING:
4136 * Kernel thread context (may sleep).
4137 */
65f27f38 4138void ata_scsi_hotplug(struct work_struct *work)
580b2102 4139{
65f27f38
DH		 4140 struct ata_port *ap =
4141 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 4142 int i;
580b2102 4143
b51e9e5d 4144 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 4145 DPRINTK("ENTER/EXIT - unloading\n");
4146 return;
4147 }
4148
85fbd722
TH		 4149 /*
4150 * XXX - UGLY HACK
4151 *
4152 * The block layer suspend/resume path is fundamentally broken due
4153 * to freezable kthreads and workqueue and may deadlock if a block
4154 * device gets removed while resume is in progress. I don't know
4155 * what the solution is short of removing freezable kthreads and
4156 * workqueues altogether.
4157 *
4158 * The following is an ugly hack to avoid kicking off device
4159 * removal while freezer is active. This is a joke but does avoid
4160 * this particular deadlock scenario.
4161 *
4162 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4163 * http://marc.info/?l=linux-kernel&m=138695698516487
4164 */
4165#ifdef CONFIG_FREEZER
4166 while (pm_freezing)
4167 msleep(10);
4168#endif
4169
580b2102 4170 DPRINTK("ENTER\n");
ad72cf98 4171 mutex_lock(&ap->scsi_scan_mutex);
580b2102 4172
41bda9c9
TH		 4173 /* Unplug detached devices. We cannot use link iterator here
4174 * because PMP links have to be scanned even if PMP is
4175 * currently not attached. Iterate manually.
4176 */
4177 ata_scsi_handle_link_detach(&ap->link);
4178 if (ap->pmp_link)
4179 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4180 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 4181
4182 /* scan for new ones */
1ae46317 4183 ata_scsi_scan_host(ap, 0);
580b2102 4184
ad72cf98 4185 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 4186 DPRINTK("EXIT\n");
4187}
83c47bcb
TH		 4188
4189/**
4190 * ata_scsi_user_scan - indication for user-initiated bus scan
4191 * @shost: SCSI host to scan
4192 * @channel: Channel to scan
4193 * @id: ID to scan
4194 * @lun: LUN to scan
4195 *
4196 * This function is called when user explicitly requests bus
4197 * scan. Set probe pending flag and invoke EH.
4198 *
4199 * LOCKING:
4200 * SCSI layer (we don't care)
4201 *
4202 * RETURNS:
4203 * Zero.
4204 */
d9027470 4205int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
9cb78c16 4206 unsigned int id, u64 lun)
83c47bcb
TH		 4207{
4208 struct ata_port *ap = ata_shost_to_port(shost);
4209 unsigned long flags;
41bda9c9 4210 int devno, rc = 0;
83c47bcb
TH		 4211
4212 if (!ap->ops->error_handler)
4213 return -EOPNOTSUPP;
4214
41bda9c9 4215 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 4216 return -EINVAL;
4217
071f44b1 4218 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 4219 if (channel != SCAN_WILD_CARD && channel)
4220 return -EINVAL;
4221 devno = id;
4222 } else {
4223 if (id != SCAN_WILD_CARD && id)
4224 return -EINVAL;
4225 devno = channel;
4226 }
4227
ba6a1308 4228 spin_lock_irqsave(ap->lock, flags);
83c47bcb 4229
41bda9c9
TH		 4230 if (devno == SCAN_WILD_CARD) {
4231 struct ata_link *link;
4232
1eca4365 4233 ata_for_each_link(link, ap, EDGE) {
41bda9c9 4234 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 4235 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 4236 ehi->action |= ATA_EH_RESET;
41bda9c9 4237 }
83c47bcb 4238 } else {
41bda9c9 4239 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 4240
4241 if (dev) {
41bda9c9 4242 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 4243 ehi->probe_mask |= 1 << dev->devno;
cf480626 4244 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 4245 } else
4246 rc = -EINVAL;
4247 }
4248
309afcb5 4249 if (rc == 0) {
83c47bcb 4250 ata_port_schedule_eh(ap);
309afcb5
TH		 4251 spin_unlock_irqrestore(ap->lock, flags);
4252 ata_port_wait_eh(ap);
4253 } else
4254 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 4255
4256 return rc;
4257}
3057ac3c 4258
4259/**
d0171269 4260 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 4261 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 4262 *
d0171269 4263 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 4264 * libata need to propagate the changes to SCSI layer.
3057ac3c 4265 *
d0171269
TH		 4266 * LOCKING:
4267 * Kernel thread context (may sleep).
3057ac3c 4268 */
65f27f38 4269void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 4270{
65f27f38
DH		 4271 struct ata_port *ap =
4272 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 4273 struct ata_link *link;
f58229f8 4274 struct ata_device *dev;
f84e7e41 4275 unsigned long flags;
3057ac3c 4276
ad72cf98 4277 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 4278 spin_lock_irqsave(ap->lock, flags);
4279
1eca4365
TH		 4280 ata_for_each_link(link, ap, EDGE) {
4281 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 4282 struct scsi_device *sdev = dev->sdev;
3057ac3c 4283
1eca4365 4284 if (!sdev)
41bda9c9
TH		 4285 continue;
4286 if (scsi_device_get(sdev))
4287 continue;
f84e7e41 4288
41bda9c9
TH		 4289 spin_unlock_irqrestore(ap->lock, flags);
4290 scsi_rescan_device(&(sdev->sdev_gendev));
4291 scsi_device_put(sdev);
4292 spin_lock_irqsave(ap->lock, flags);
4293 }
3057ac3c 4294 }
f84e7e41
TH		 4295
4296 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 4297 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 4298}
80289167
BK		 4299
4300/**
4301 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 4302 * @host: ATA host container for all SAS ports
80289167 4303 * @port_info: Information from low-level host driver
cca3974e 4304 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 4305 *
4306 * LOCKING:
4307 * PCI/etc. bus probe sem.
4308 *
4309 * RETURNS:
4310 * ata_port pointer on success / NULL on failure.
4311 */
4312
cca3974e 4313struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 4314 struct ata_port_info *port_info,
cca3974e 4315 struct Scsi_Host *shost)
80289167 4316{
f3187195 4317 struct ata_port *ap;
80289167 4318
f3187195 4319 ap = ata_port_alloc(host);
80289167
BK		 4320 if (!ap)
4321 return NULL;
4322
f3187195 4323 ap->port_no = 0;
a29b5dad 4324 ap->lock = &host->lock;
f3187195
TH		 4325 ap->pio_mask = port_info->pio_mask;
4326 ap->mwdma_mask = port_info->mwdma_mask;
4327 ap->udma_mask = port_info->udma_mask;
4328 ap->flags |= port_info->flags;
4329 ap->ops = port_info->port_ops;
4330 ap->cbl = ATA_CBL_SATA;
4331
80289167
BK		 4332 return ap;
4333}
4334EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4335
4336/**
4337 * ata_sas_port_start - Set port up for dma.
4338 * @ap: Port to initialize
4339 *
4340 * Called just after data structures for each port are
dde20207 4341 * initialized.
80289167
BK		 4342 *
4343 * May be used as the port_start() entry in ata_port_operations.
4344 *
4345 * LOCKING:
4346 * Inherited from caller.
4347 */
4348int ata_sas_port_start(struct ata_port *ap)
4349{
3f1e046a
NA		 4350 /*
4351 * the port is marked as frozen at allocation time, but if we don't
4352 * have new eh, we won't thaw it
4353 */
4354 if (!ap->ops->error_handler)
4355 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 4356 return 0;
80289167
BK		 4357}
4358EXPORT_SYMBOL_GPL(ata_sas_port_start);
4359
4360/**
4361 * ata_port_stop - Undo ata_sas_port_start()
4362 * @ap: Port to shut down
4363 *
80289167
BK		 4364 * May be used as the port_stop() entry in ata_port_operations.
4365 *
4366 * LOCKING:
4367 * Inherited from caller.
4368 */
4369
4370void ata_sas_port_stop(struct ata_port *ap)
4371{
80289167
BK		 4372}
4373EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4374
b2024459
DW		 4375/**
4376 * ata_sas_async_probe - simply schedule probing and return
4377 * @ap: Port to probe
4378 *
4379 * For batch scheduling of probe for sas attached ata devices, assumes
4380 * the port has already been through ata_sas_port_init()
4381 */
4382void ata_sas_async_probe(struct ata_port *ap)
9508a66f 4383{
b2024459
DW		 4384 __ata_port_probe(ap);
4385}
4386EXPORT_SYMBOL_GPL(ata_sas_async_probe);
9508a66f 4387
b2024459
DW		 4388int ata_sas_sync_probe(struct ata_port *ap)
4389{
4390 return ata_port_probe(ap);
9508a66f 4391}
b2024459
DW		 4392EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4393
9508a66f 4394
80289167
BK		 4395/**
4396 * ata_sas_port_init - Initialize a SATA device
4397 * @ap: SATA port to initialize
4398 *
4399 * LOCKING:
4400 * PCI/etc. bus probe sem.
4401 *
4402 * RETURNS:
4403 * Zero on success, non-zero on error.
4404 */
4405
4406int ata_sas_port_init(struct ata_port *ap)
4407{
4408 int rc = ap->ops->port_start(ap);
4409
b2024459
DW		 4410 if (rc)
4411 return rc;
4412 ap->print_id = atomic_inc_return(&ata_print_id);
4413 return 0;
80289167
BK		 4414}
4415EXPORT_SYMBOL_GPL(ata_sas_port_init);
4416
4417/**
4418 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4419 * @ap: SATA port to destroy
4420 *
4421 */
4422
4423void ata_sas_port_destroy(struct ata_port *ap)
4424{
f0d36efd
TH		 4425 if (ap->ops->port_stop)
4426 ap->ops->port_stop(ap);
80289167
BK		 4427 kfree(ap);
4428}
4429EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4430
4431/**
4432 * ata_sas_slave_configure - Default slave_config routine for libata devices
4433 * @sdev: SCSI device to configure
4434 * @ap: ATA port to which SCSI device is attached
4435 *
4436 * RETURNS:
4437 * Zero.
4438 */
4439
4440int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4441{
4442 ata_scsi_sdev_config(sdev);
9af5c9c9 4443 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 4444 return 0;
4445}
4446EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4447
4448/**
4449 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4450 * @cmd: SCSI command to be sent
80289167
BK		 4451 * @ap: ATA port to which the command is being sent
4452 *
4453 * RETURNS:
08475a19
BK		 4454 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4455 * 0 otherwise.
80289167
BK		 4456 */
4457
b27dcfb0 4458int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 4459{
08475a19
BK		 4460 int rc = 0;
4461
80289167
BK		 4462 ata_scsi_dump_cdb(ap, cmd);
4463
2486fa56 4464 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 4465 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 4466 else {
4467 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 4468 cmd->scsi_done(cmd);
80289167 4469 }
08475a19 4470 return rc;
80289167
BK		 4471}
4472EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
98bd4be1
SL		 4473
4474int ata_sas_allocate_tag(struct ata_port *ap)
4475{
4476 unsigned int max_queue = ap->host->n_tags;
4477 unsigned int i, tag;
4478
4479 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
3a028243 4480 tag = tag < max_queue ? tag : 0;
98bd4be1
SL		 4481
4482 /* the last tag is reserved for internal command. */
4483 if (tag == ATA_TAG_INTERNAL)
4484 continue;
4485
4486 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
4487 ap->sas_last_tag = tag;
4488 return tag;
4489 }
4490 }
4491 return -1;
4492}
4493
4494void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
4495{
4496 clear_bit(tag, &ap->sas_tag_allocated);
4497}
Linux kernel - Deliverables
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