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Linux 3.2-rc1
[deliverable/linux.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
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
c93b263e
TH		 114static ssize_t ata_scsi_lpm_store(struct device *dev,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
ca77329f 117{
ee959b00 118 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 119 struct ata_port *ap = ata_shost_to_port(shost);
c93b263e 120 enum ata_lpm_policy policy;
6b7ae954 121 unsigned long flags;
c93b263e
TH		 122
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy = ATA_LPM_MAX_POWER;
125 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
126 const char *name = ata_lpm_policy_names[policy];
127
128 if (strncmp(name, buf, strlen(name)) == 0)
ca77329f 129 break;
ca77329f 130 }
c93b263e 131 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 132 return -EINVAL;
133
6b7ae954
TH		 134 spin_lock_irqsave(ap->lock, flags);
135 ap->target_lpm_policy = policy;
136 ata_port_schedule_eh(ap);
137 spin_unlock_irqrestore(ap->lock, flags);
138
ca77329f
KCA		 139 return count;
140}
141
c93b263e
TH		 142static ssize_t ata_scsi_lpm_show(struct device *dev,
143 struct device_attribute *attr, char *buf)
ca77329f 144{
ee959b00 145 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 146 struct ata_port *ap = ata_shost_to_port(shost);
ca77329f 147
6b7ae954 148 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 149 return -EINVAL;
150
c93b263e 151 return snprintf(buf, PAGE_SIZE, "%s\n",
6b7ae954 152 ata_lpm_policy_names[ap->target_lpm_policy]);
ca77329f 153}
ee959b00 154DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
c93b263e 155 ata_scsi_lpm_show, ata_scsi_lpm_store);
ee959b00 156EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 157
45fabbb7
EO		 158static ssize_t ata_scsi_park_show(struct device *device,
159 struct device_attribute *attr, char *buf)
160{
161 struct scsi_device *sdev = to_scsi_device(device);
162 struct ata_port *ap;
163 struct ata_link *link;
164 struct ata_device *dev;
a464189d 165 unsigned long flags, now;
45fabbb7
EO		 166 unsigned int uninitialized_var(msecs);
167 int rc = 0;
168
169 ap = ata_shost_to_port(sdev->host);
170
171 spin_lock_irqsave(ap->lock, flags);
172 dev = ata_scsi_find_dev(ap, sdev);
173 if (!dev) {
174 rc = -ENODEV;
175 goto unlock;
176 }
177 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
178 rc = -EOPNOTSUPP;
179 goto unlock;
180 }
181
182 link = dev->link;
a464189d 183 now = jiffies;
45fabbb7
EO		 184 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
185 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 186 time_after(dev->unpark_deadline, now))
187 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 188 else
189 msecs = 0;
190
191unlock:
192 spin_unlock_irq(ap->lock);
193
194 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
195}
196
197static ssize_t ata_scsi_park_store(struct device *device,
198 struct device_attribute *attr,
199 const char *buf, size_t len)
200{
201 struct scsi_device *sdev = to_scsi_device(device);
202 struct ata_port *ap;
203 struct ata_device *dev;
204 long int input;
205 unsigned long flags;
206 int rc;
207
208 rc = strict_strtol(buf, 10, &input);
209 if (rc || input < -2)
210 return -EINVAL;
211 if (input > ATA_TMOUT_MAX_PARK) {
212 rc = -EOVERFLOW;
213 input = ATA_TMOUT_MAX_PARK;
214 }
215
216 ap = ata_shost_to_port(sdev->host);
217
218 spin_lock_irqsave(ap->lock, flags);
219 dev = ata_scsi_find_dev(ap, sdev);
220 if (unlikely(!dev)) {
221 rc = -ENODEV;
222 goto unlock;
223 }
224 if (dev->class != ATA_DEV_ATA) {
225 rc = -EOPNOTSUPP;
226 goto unlock;
227 }
228
229 if (input >= 0) {
230 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
231 rc = -EOPNOTSUPP;
232 goto unlock;
233 }
234
235 dev->unpark_deadline = ata_deadline(jiffies, input);
236 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
237 ata_port_schedule_eh(ap);
238 complete(&ap->park_req_pending);
239 } else {
240 switch (input) {
241 case -1:
242 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
243 break;
244 case -2:
245 dev->flags |= ATA_DFLAG_NO_UNLOAD;
246 break;
247 }
248 }
249unlock:
250 spin_unlock_irqrestore(ap->lock, flags);
251
252 return rc ? rc : len;
253}
254DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
255 ata_scsi_park_show, ata_scsi_park_store);
256EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
257
f0761be3
TH		 258static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
259{
260 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
261
262 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
263}
264
18f7ba4c
KCA		 265static ssize_t
266ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
267 const char *buf, size_t count)
268{
269 struct Scsi_Host *shost = class_to_shost(dev);
270 struct ata_port *ap = ata_shost_to_port(shost);
271 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
272 return ap->ops->em_store(ap, buf, count);
273 return -EINVAL;
274}
275
276static ssize_t
277ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
278 char *buf)
279{
280 struct Scsi_Host *shost = class_to_shost(dev);
281 struct ata_port *ap = ata_shost_to_port(shost);
282
283 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
284 return ap->ops->em_show(ap, buf);
285 return -EINVAL;
286}
ea7a5ed5 287DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
18f7ba4c
KCA		 288 ata_scsi_em_message_show, ata_scsi_em_message_store);
289EXPORT_SYMBOL_GPL(dev_attr_em_message);
290
291static ssize_t
292ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
293 char *buf)
294{
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct ata_port *ap = ata_shost_to_port(shost);
297
298 return snprintf(buf, 23, "%d\n", ap->em_message_type);
299}
300DEVICE_ATTR(em_message_type, S_IRUGO,
301 ata_scsi_em_message_type_show, NULL);
302EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
303
304static ssize_t
305ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
306 char *buf)
307{
308 struct scsi_device *sdev = to_scsi_device(dev);
309 struct ata_port *ap = ata_shost_to_port(sdev->host);
310 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
311
312 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
313 return ap->ops->sw_activity_show(atadev, buf);
314 return -EINVAL;
315}
316
317static ssize_t
318ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
319 const char *buf, size_t count)
320{
321 struct scsi_device *sdev = to_scsi_device(dev);
322 struct ata_port *ap = ata_shost_to_port(sdev->host);
323 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
324 enum sw_activity val;
325 int rc;
326
327 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
328 val = simple_strtoul(buf, NULL, 0);
329 switch (val) {
330 case OFF: case BLINK_ON: case BLINK_OFF:
331 rc = ap->ops->sw_activity_store(atadev, val);
332 if (!rc)
333 return count;
334 else
335 return rc;
336 }
337 }
338 return -EINVAL;
339}
ea7a5ed5 340DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
18f7ba4c
KCA		 341 ata_scsi_activity_store);
342EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
343
45fabbb7
EO		 344struct device_attribute *ata_common_sdev_attrs[] = {
345 &dev_attr_unload_heads,
346 NULL
347};
348EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
349
b27dcfb0 350static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
ae006510
DG		 351{
352 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
353 /* "Invalid field in cbd" */
b27dcfb0 354 cmd->scsi_done(cmd);
ae006510
DG		 355}
356
1da177e4
LT		 357/**
358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
359 * @sdev: SCSI device for which BIOS geometry is to be determined
360 * @bdev: block device associated with @sdev
361 * @capacity: capacity of SCSI device
362 * @geom: location to which geometry will be output
363 *
364 * Generic bios head/sector/cylinder calculator
365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
366 * mapping. Some situations may arise where the disk is not
367 * bootable if this is not used.
368 *
369 * LOCKING:
370 * Defined by the SCSI layer. We don't really care.
371 *
372 * RETURNS:
373 * Zero.
374 */
375int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
376 sector_t capacity, int geom[])
377{
378 geom[0] = 255;
379 geom[1] = 63;
380 sector_div(capacity, 255*63);
381 geom[2] = capacity;
382
383 return 0;
384}
385
d8d9129e
TH		 386/**
387 * ata_scsi_unlock_native_capacity - unlock native capacity
388 * @sdev: SCSI device to adjust device capacity for
389 *
390 * This function is called if a partition on @sdev extends beyond
391 * the end of the device. It requests EH to unlock HPA.
392 *
393 * LOCKING:
394 * Defined by the SCSI layer. Might sleep.
395 */
396void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
397{
398 struct ata_port *ap = ata_shost_to_port(sdev->host);
399 struct ata_device *dev;
400 unsigned long flags;
401
402 spin_lock_irqsave(ap->lock, flags);
403
404 dev = ata_scsi_find_dev(ap, sdev);
405 if (dev && dev->n_sectors < dev->n_native_sectors) {
406 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
407 dev->link->eh_info.action |= ATA_EH_RESET;
408 ata_port_schedule_eh(ap);
409 }
410
411 spin_unlock_irqrestore(ap->lock, flags);
412 ata_port_wait_eh(ap);
413}
414
5924b74c
TH		 415/**
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 417 * @ap: target port
5924b74c
TH		 418 * @sdev: SCSI device to get identify data for
419 * @arg: User buffer area for identify data
420 *
421 * LOCKING:
422 * Defined by the SCSI layer. We don't really care.
423 *
424 * RETURNS:
425 * Zero on success, negative errno on error.
426 */
94be9a58
JG		 427static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
428 void __user *arg)
5924b74c 429{
5924b74c
TH		 430 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
431 u16 __user *dst = arg;
432 char buf[40];
433
434 if (!dev)
435 return -ENOMSG;
436
437 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
438 return -EFAULT;
439
440 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
441 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
442 return -EFAULT;
443
444 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
445 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
446 return -EFAULT;
447
448 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
449 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
450 return -EFAULT;
451
452 return 0;
453}
454
b095518e
JG		 455/**
456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 457 * @scsidev: Device to which we are issuing command
b095518e
JG		 458 * @arg: User provided data for issuing command
459 *
460 * LOCKING:
461 * Defined by the SCSI layer. We don't really care.
462 *
463 * RETURNS:
464 * Zero on success, negative errno on error.
465 */
b095518e
JG		 466int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
467{
468 int rc = 0;
469 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 470 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 471 int argsize = 0;
85837ebd 472 enum dma_data_direction data_dir;
bbe1fe7e 473 int cmd_result;
b095518e 474
c893a3ae 475 if (arg == NULL)
b095518e
JG		 476 return -EINVAL;
477
478 if (copy_from_user(args, arg, sizeof(args)))
479 return -EFAULT;
480
bbe1fe7e
ET		 481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
482 if (!sensebuf)
483 return -ENOMEM;
484
b095518e
JG		 485 memset(scsi_cmd, 0, sizeof(scsi_cmd));
486
487 if (args[3]) {
295124dc 488 argsize = ATA_SECT_SIZE * args[3];
b095518e 489 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 490 if (argbuf == NULL) {
491 rc = -ENOMEM;
492 goto error;
493 }
b095518e
JG		 494
495 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
496 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 497 block count in sector count field */
85837ebd 498 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 499 } else {
500 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 501 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 502 data_dir = DMA_NONE;
b095518e
JG		 503 }
504
505 scsi_cmd[0] = ATA_16;
506
507 scsi_cmd[4] = args[2];
a4f19040 508 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 509 scsi_cmd[6] = args[3];
510 scsi_cmd[8] = args[1];
511 scsi_cmd[10] = 0x4f;
512 scsi_cmd[12] = 0xc2;
513 } else {
514 scsi_cmd[6] = args[1];
515 }
516 scsi_cmd[14] = args[0];
517
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 520 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 521 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 522
523 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
524 u8 *desc = sensebuf + 8;
525 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526
527 /* If we set cc then ATA pass-through will cause a
528 * check condition even if no error. Filter that. */
529 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
530 struct scsi_sense_hdr sshdr;
531 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e
JG		 532 &sshdr);
533 if (sshdr.sense_key == 0 &&
534 sshdr.asc == 0 && sshdr.ascq == 0)
bbe1fe7e
ET		 535 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
536 }
537
538 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 539 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
540 desc[0] == 0x09) { /* code is "ATA Descriptor" */
541 args[0] = desc[13]; /* status */
542 args[1] = desc[3]; /* error */
543 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 544 if (copy_to_user(arg, args, sizeof(args)))
545 rc = -EFAULT;
546 }
547 }
548
549
550 if (cmd_result) {
b095518e
JG		 551 rc = -EIO;
552 goto error;
553 }
554
b095518e 555 if ((argbuf)
c893a3ae 556 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 557 rc = -EFAULT;
558error:
bbe1fe7e 559 kfree(sensebuf);
8f760780 560 kfree(argbuf);
b095518e
JG		 561 return rc;
562}
563
564/**
565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 566 * @scsidev: Device to which we are issuing command
b095518e
JG		 567 * @arg: User provided data for issuing command
568 *
569 * LOCKING:
570 * Defined by the SCSI layer. We don't really care.
571 *
572 * RETURNS:
573 * Zero on success, negative errno on error.
574 */
575int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
576{
577 int rc = 0;
578 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 579 u8 args[7], *sensebuf = NULL;
580 int cmd_result;
b095518e 581
c893a3ae 582 if (arg == NULL)
b095518e
JG		 583 return -EINVAL;
584
585 if (copy_from_user(args, arg, sizeof(args)))
586 return -EFAULT;
587
af068bd1
DM		 588 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
589 if (!sensebuf)
590 return -ENOMEM;
591
b095518e
JG		 592 memset(scsi_cmd, 0, sizeof(scsi_cmd));
593 scsi_cmd[0] = ATA_16;
594 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 595 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 596 scsi_cmd[4] = args[1];
597 scsi_cmd[6] = args[2];
598 scsi_cmd[8] = args[3];
599 scsi_cmd[10] = args[4];
600 scsi_cmd[12] = args[5];
277239f2 601 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 602 scsi_cmd[14] = args[0];
603
b095518e 604 /* Good values for timeout and retries? Values below
2e9edbf8 605 from scsi_ioctl_send_command() for default case... */
af068bd1 606 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 607 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 608
609 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
610 u8 *desc = sensebuf + 8;
611 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612
613 /* If we set cc then ATA pass-through will cause a
614 * check condition even if no error. Filter that. */
615 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
616 struct scsi_sense_hdr sshdr;
617 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
618 &sshdr);
2dcb407e
JG		 619 if (sshdr.sense_key == 0 &&
620 sshdr.asc == 0 && sshdr.ascq == 0)
af068bd1
DM		 621 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
622 }
623
624 /* Send userspace ATA registers */
625 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
626 desc[0] == 0x09) {/* code is "ATA Descriptor" */
627 args[0] = desc[13]; /* status */
628 args[1] = desc[3]; /* error */
629 args[2] = desc[5]; /* sector count (0:7) */
630 args[3] = desc[7]; /* lbal */
631 args[4] = desc[9]; /* lbam */
632 args[5] = desc[11]; /* lbah */
633 args[6] = desc[12]; /* select */
634 if (copy_to_user(arg, args, sizeof(args)))
635 rc = -EFAULT;
636 }
637 }
638
639 if (cmd_result) {
b095518e 640 rc = -EIO;
af068bd1
DM		 641 goto error;
642 }
b095518e 643
af068bd1
DM		 644 error:
645 kfree(sensebuf);
b095518e
JG		 646 return rc;
647}
648
e3cf95dd
AC		 649static int ata_ioc32(struct ata_port *ap)
650{
651 if (ap->flags & ATA_FLAG_PIO_DMA)
652 return 1;
653 if (ap->pflags & ATA_PFLAG_PIO32)
654 return 1;
655 return 0;
656}
657
94be9a58
JG		 658int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
659 int cmd, void __user *arg)
1da177e4 660{
1da177e4 661 int val = -EINVAL, rc = -EINVAL;
e3cf95dd 662 unsigned long flags;
1da177e4 663
1da177e4
LT		 664 switch (cmd) {
665 case ATA_IOC_GET_IO32:
e3cf95dd
AC		 666 spin_lock_irqsave(ap->lock, flags);
667 val = ata_ioc32(ap);
668 spin_unlock_irqrestore(ap->lock, flags);
1da177e4
LT		 669 if (copy_to_user(arg, &val, 1))
670 return -EFAULT;
671 return 0;
672
673 case ATA_IOC_SET_IO32:
674 val = (unsigned long) arg;
e3cf95dd
AC		 675 rc = 0;
676 spin_lock_irqsave(ap->lock, flags);
677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
678 if (val)
679 ap->pflags |= ATA_PFLAG_PIO32;
680 else
681 ap->pflags &= ~ATA_PFLAG_PIO32;
682 } else {
683 if (val != ata_ioc32(ap))
684 rc = -EINVAL;
685 }
686 spin_unlock_irqrestore(ap->lock, flags);
687 return rc;
1da177e4 688
5924b74c 689 case HDIO_GET_IDENTITY:
94be9a58 690 return ata_get_identity(ap, scsidev, arg);
5924b74c 691
b095518e
JG		 692 case HDIO_DRIVE_CMD:
693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
694 return -EACCES;
695 return ata_cmd_ioctl(scsidev, arg);
696
697 case HDIO_DRIVE_TASK:
698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
699 return -EACCES;
700 return ata_task_ioctl(scsidev, arg);
701
1da177e4
LT		 702 default:
703 rc = -ENOTTY;
704 break;
705 }
706
1da177e4
LT		 707 return rc;
708}
94be9a58
JG		 709EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
710
711int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
712{
713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
714 scsidev, cmd, arg);
715}
716EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 717
718/**
719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 720 * @dev: ATA device to which the new command is attached
721 * @cmd: SCSI command that originated this ATA command
1da177e4
LT		 722 *
723 * Obtain a reference to an unused ata_queued_cmd structure,
724 * which is the basic libata structure representing a single
725 * ATA command sent to the hardware.
726 *
727 * If a command was available, fill in the SCSI-specific
728 * portions of the structure with information on the
729 * current command.
730 *
731 * LOCKING:
cca3974e 732 * spin_lock_irqsave(host lock)
1da177e4
LT		 733 *
734 * RETURNS:
735 * Command allocated, or %NULL if none available.
736 */
7102d230 737static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
b27dcfb0 738 struct scsi_cmnd *cmd)
1da177e4
LT		 739{
740 struct ata_queued_cmd *qc;
741
8a8bc223 742 qc = ata_qc_new_init(dev);
1da177e4
LT		 743 if (qc) {
744 qc->scsicmd = cmd;
b27dcfb0 745 qc->scsidone = cmd->scsi_done;
1da177e4 746
ff2aeb1e 747 qc->sg = scsi_sglist(cmd);
7120165c 748 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 749 } else {
750 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
b27dcfb0 751 cmd->scsi_done(cmd);
1da177e4
LT		 752 }
753
754 return qc;
755}
756
aacda375
TH		 757static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
758{
759 struct scsi_cmnd *scmd = qc->scsicmd;
760
761 qc->extrabytes = scmd->request->extra_len;
762 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
763}
764
b095518e
JG		 765/**
766 * ata_dump_status - user friendly display of error info
767 * @id: id of the port in question
768 * @tf: ptr to filled out taskfile
769 *
770 * Decode and dump the ATA error/status registers for the user so
771 * that they have some idea what really happened at the non
772 * make-believe layer.
773 *
774 * LOCKING:
775 * inherited from caller
776 */
7102d230 777static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 778{
779 u8 stat = tf->command, err = tf->feature;
780
781 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
782 if (stat & ATA_BUSY) {
783 printk("Busy }\n"); /* Data is not valid in this case */
784 } else {
785 if (stat & 0x40) printk("DriveReady ");
786 if (stat & 0x20) printk("DeviceFault ");
787 if (stat & 0x10) printk("SeekComplete ");
788 if (stat & 0x08) printk("DataRequest ");
789 if (stat & 0x04) printk("CorrectedError ");
790 if (stat & 0x02) printk("Index ");
791 if (stat & 0x01) printk("Error ");
792 printk("}\n");
793
794 if (err) {
795 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
796 if (err & 0x04) printk("DriveStatusError ");
797 if (err & 0x80) {
798 if (err & 0x04) printk("BadCRC ");
799 else printk("Sector ");
800 }
801 if (err & 0x40) printk("UncorrectableError ");
802 if (err & 0x10) printk("SectorIdNotFound ");
803 if (err & 0x02) printk("TrackZeroNotFound ");
804 if (err & 0x01) printk("AddrMarkNotFound ");
805 printk("}\n");
806 }
807 }
808}
809
1da177e4
LT		 810/**
811 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 812 * @id: ATA device number
1da177e4 813 * @drv_stat: value contained in ATA status register
b095518e
JG		 814 * @drv_err: value contained in ATA error register
815 * @sk: the sense key we'll fill out
816 * @asc: the additional sense code we'll fill out
817 * @ascq: the additional sense code qualifier we'll fill out
246619da 818 * @verbose: be verbose
1da177e4 819 *
b095518e
JG		 820 * Converts an ATA error into a SCSI error. Fill out pointers to
821 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
822 * format sense blocks.
1da177e4
LT		 823 *
824 * LOCKING:
cca3974e 825 * spin_lock_irqsave(host lock)
1da177e4 826 */
7102d230
AB		 827static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
828 u8 *asc, u8 *ascq, int verbose)
1da177e4 829{
b095518e 830 int i;
ffe75ef6 831
1da177e4 832 /* Based on the 3ware driver translation table */
98ac62de 833 static const unsigned char sense_table[][4] = {
1da177e4
LT		 834 /* BBD|ECC|ID|MAR */
835 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
836 /* BBD|ECC|ID */
837 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
838 /* ECC|MC|MARK */
839 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
840 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
841 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
842 /* MC|ID|ABRT|TRK0|MARK */
843 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
844 /* MCR|MARK */
845 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
846 /* Bad address mark */
847 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
848 /* TRK0 */
849 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
850 /* Abort & !ICRC */
851 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
852 /* Media change request */
853 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
854 /* SRV */
855 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
856 /* Media change */
857 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
858 /* ECC */
859 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
860 /* BBD - block marked bad */
861 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
862 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
863 };
98ac62de 864 static const unsigned char stat_table[][4] = {
1da177e4
LT		 865 /* Must be first because BUSY means no other bits valid */
866 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
867 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
868 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
869 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
870 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
871 };
1da177e4 872
1da177e4
LT		 873 /*
874 * Is this an error we can process/parse
875 */
b095518e
JG		 876 if (drv_stat & ATA_BUSY) {
877 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 878 }
b095518e
JG		 879
880 if (drv_err) {
881 /* Look for drv_err */
882 for (i = 0; sense_table[i][0] != 0xFF; i++) {
883 /* Look for best matches first */
2e9edbf8 884 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 885 sense_table[i][0]) {
886 *sk = sense_table[i][1];
887 *asc = sense_table[i][2];
888 *ascq = sense_table[i][3];
889 goto translate_done;
890 }
891 }
892 /* No immediate match */
246619da
TH		 893 if (verbose)
894 printk(KERN_WARNING "ata%u: no sense translation for "
895 "error 0x%02x\n", id, drv_err);
1da177e4 896 }
b095518e
JG		 897
898 /* Fall back to interpreting status bits */
899 for (i = 0; stat_table[i][0] != 0xFF; i++) {
900 if (stat_table[i][0] & drv_stat) {
901 *sk = stat_table[i][1];
902 *asc = stat_table[i][2];
903 *ascq = stat_table[i][3];
904 goto translate_done;
1da177e4 905 }
b095518e
JG		 906 }
907 /* No error? Undecoded? */
246619da
TH		 908 if (verbose)
909 printk(KERN_WARNING "ata%u: no sense translation for "
910 "status: 0x%02x\n", id, drv_stat);
b095518e 911
2d202024
AC		 912 /* We need a sensible error return here, which is tricky, and one
913 that won't cause people to do things like return a disk wrongly */
914 *sk = ABORTED_COMMAND;
915 *asc = 0x00;
916 *ascq = 0x00;
b095518e
JG		 917
918 translate_done:
246619da
TH		 919 if (verbose)
920 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
921 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
922 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 923 return;
924}
925
926/*
750426aa 927 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 928 * @qc: Command that completed.
929 *
930 * This function is specific to the ATA descriptor format sense
931 * block specified for the ATA pass through commands. Regardless
932 * of whether the command errored or not, return a sense
933 * block. Copy all controller registers into the sense
934 * block. Clear sense key, ASC & ASCQ if there is no error.
935 *
936 * LOCKING:
750426aa 937 * None.
b095518e 938 */
750426aa 939static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 940{
941 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 942 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 943 unsigned char *sb = cmd->sense_buffer;
944 unsigned char *desc = sb + 8;
246619da 945 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 946
947 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
948
0e5dec47 949 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 950
b095518e
JG		 951 /*
952 * Use ata_to_sense_error() to map status register bits
953 * onto sense key, asc & ascq.
954 */
058e55e1
TH		 955 if (qc->err_mask ||
956 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 957 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 958 &sb[1], &sb[2], &sb[3], verbose);
b095518e 959 sb[1] &= 0x0f;
1da177e4
LT		 960 }
961
b095518e
JG		 962 /*
963 * Sense data is current and format is descriptor.
964 */
965 sb[0] = 0x72;
1da177e4 966
b095518e
JG		 967 desc[0] = 0x09;
968
f38621b3
TH		 969 /* set length of additional sense data */
970 sb[7] = 14;
971 desc[1] = 12;
b095518e
JG		 972
973 /*
974 * Copy registers into sense buffer.
975 */
976 desc[2] = 0x00;
977 desc[3] = tf->feature; /* == error reg */
978 desc[5] = tf->nsect;
979 desc[7] = tf->lbal;
980 desc[9] = tf->lbam;
981 desc[11] = tf->lbah;
982 desc[12] = tf->device;
983 desc[13] = tf->command; /* == status reg */
984
985 /*
986 * Fill in Extend bit, and the high order bytes
987 * if applicable.
988 */
989 if (tf->flags & ATA_TFLAG_LBA48) {
990 desc[2] |= 0x01;
991 desc[4] = tf->hob_nsect;
992 desc[6] = tf->hob_lbal;
993 desc[8] = tf->hob_lbam;
994 desc[10] = tf->hob_lbah;
1da177e4 995 }
b095518e 996}
1da177e4 997
b095518e 998/**
750426aa 999 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1000 * @qc: Command that we are erroring out
1001 *
d25614ba 1002 * Generate sense block for a failed ATA command @qc. Descriptor
25985edc 1003 * format is used to accommodate LBA48 block address.
b095518e
JG		 1004 *
1005 * LOCKING:
750426aa 1006 * None.
b095518e 1007 */
750426aa 1008static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1009{
d25614ba 1010 struct ata_device *dev = qc->dev;
b095518e 1011 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1012 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1013 unsigned char *sb = cmd->sense_buffer;
d25614ba 1014 unsigned char *desc = sb + 8;
246619da 1015 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1016 u64 block;
b095518e
JG		 1017
1018 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1019
0e5dec47 1020 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1021
d25614ba
TH		 1022 /* sense data is current and format is descriptor */
1023 sb[0] = 0x72;
1024
1025 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1026 * onto sense key, asc & ascq.
1027 */
058e55e1
TH		 1028 if (qc->err_mask ||
1029 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1030 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1031 &sb[1], &sb[2], &sb[3], verbose);
1032 sb[1] &= 0x0f;
1da177e4 1033 }
1da177e4 1034
d25614ba 1035 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1036
d25614ba
TH		 1037 /* information sense data descriptor */
1038 sb[7] = 12;
1039 desc[0] = 0x00;
1040 desc[1] = 10;
a7dac447 1041
d25614ba
TH		 1042 desc[2] |= 0x80; /* valid */
1043 desc[6] = block >> 40;
1044 desc[7] = block >> 32;
1045 desc[8] = block >> 24;
1046 desc[9] = block >> 16;
1047 desc[10] = block >> 8;
1048 desc[11] = block;
1da177e4
LT		 1049}
1050
a6cce2a7
BK		 1051static void ata_scsi_sdev_config(struct scsi_device *sdev)
1052{
1053 sdev->use_10_for_rw = 1;
1054 sdev->use_10_for_ms = 1;
31cc23b3
TH		 1055
1056 /* Schedule policy is determined by ->qc_defer() callback and
1057 * it needs to see every deferred qc. Set dev_blocked to 1 to
1058 * prevent SCSI midlayer from automatically deferring
1059 * requests.
1060 */
1061 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1062}
1063
fa2fc7f4
JB		 1064/**
1065 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1066 * @rq: request to be checked
fa2fc7f4
JB		 1067 *
1068 * ATAPI commands which transfer variable length data to host
1069 * might overflow due to application error or hardare bug. This
1070 * function checks whether overflow should be drained and ignored
1071 * for @request.
1072 *
1073 * LOCKING:
1074 * None.
1075 *
1076 * RETURNS:
1077 * 1 if ; otherwise, 0.
1078 */
1079static int atapi_drain_needed(struct request *rq)
1080{
33659ebb 1081 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1082 return 0;
1083
7b6d91da 1084 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
fa2fc7f4
JB		 1085 return 0;
1086
1087 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1088}
1089
1090static int ata_scsi_dev_config(struct scsi_device *sdev,
1091 struct ata_device *dev)
a6cce2a7 1092{
900e599e 1093 struct request_queue *q = sdev->request_queue;
1094
45fabbb7
EO		 1095 if (!ata_id_has_unload(dev->id))
1096 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1097
914ed354 1098 /* configure max sectors */
900e599e 1099 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1100
fa2fc7f4 1101 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1102 void *buf;
1103
729a6a30
TH		 1104 sdev->sector_size = ATA_SECT_SIZE;
1105
1106 /* set DMA padding */
900e599e 1107 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1108
1109 /* configure draining */
1110 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1111 if (!buf) {
a9a79dfe 1112 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1113 return -ENOMEM;
1114 }
1115
1116 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1117 } else {
295124dc 1118 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1119 sdev->manage_start_stop = 1;
dde20207 1120 }
d8cf5389 1121
729a6a30
TH		 1122 /*
1123 * ata_pio_sectors() expects buffer for each sector to not cross
1124 * page boundary. Enforce it by requiring buffers to be sector
1125 * aligned, which works iff sector_size is not larger than
1126 * PAGE_SIZE. ATAPI devices also need the alignment as
1127 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1128 */
1129 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1130 ata_dev_warn(dev,
729a6a30
TH		 1131 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1132 sdev->sector_size);
1133
900e599e 1134 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1135
f26792d5
JG		 1136 if (dev->flags & ATA_DFLAG_AN)
1137 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1138
a6e6ce8e
TH		 1139 if (dev->flags & ATA_DFLAG_NCQ) {
1140 int depth;
1141
1142 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1143 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1144 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1145 }
fa2fc7f4 1146
900e599e 1147 blk_queue_flush_queueable(q, false);
1148
295124dc 1149 dev->sdev = sdev;
fa2fc7f4 1150 return 0;
a6cce2a7
BK		 1151}
1152
1da177e4
LT		 1153/**
1154 * ata_scsi_slave_config - Set SCSI device attributes
1155 * @sdev: SCSI device to examine
1156 *
1157 * This is called before we actually start reading
1158 * and writing to the device, to configure certain
1159 * SCSI mid-layer behaviors.
1160 *
1161 * LOCKING:
1162 * Defined by SCSI layer. We don't really care.
1163 */
1164
1165int ata_scsi_slave_config(struct scsi_device *sdev)
1166{
31534363
TH		 1167 struct ata_port *ap = ata_shost_to_port(sdev->host);
1168 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1169 int rc = 0;
31534363 1170
a6cce2a7 1171 ata_scsi_sdev_config(sdev);
1da177e4 1172
31534363 1173 if (dev)
fa2fc7f4 1174 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1175
fa2fc7f4 1176 return rc;
1da177e4
LT		 1177}
1178
83c47bcb
TH		 1179/**
1180 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1181 * @sdev: SCSI device to be destroyed
1182 *
1183 * @sdev is about to be destroyed for hot/warm unplugging. If
1184 * this unplugging was initiated by libata as indicated by NULL
1185 * dev->sdev, this function doesn't have to do anything.
1186 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1187 * Clear dev->sdev, schedule the device for ATA detach and invoke
1188 * EH.
1189 *
1190 * LOCKING:
1191 * Defined by SCSI layer. We don't really care.
1192 */
1193void ata_scsi_slave_destroy(struct scsi_device *sdev)
1194{
1195 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1196 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1197 unsigned long flags;
1198 struct ata_device *dev;
1199
1200 if (!ap->ops->error_handler)
1201 return;
1202
ba6a1308 1203 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1204 dev = __ata_scsi_find_dev(ap, sdev);
1205 if (dev && dev->sdev) {
1206 /* SCSI device already in CANCEL state, no need to offline it */
1207 dev->sdev = NULL;
1208 dev->flags |= ATA_DFLAG_DETACH;
1209 ata_port_schedule_eh(ap);
1210 }
ba6a1308 1211 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1212
1213 kfree(q->dma_drain_buffer);
1214 q->dma_drain_buffer = NULL;
1215 q->dma_drain_size = 0;
83c47bcb
TH		 1216}
1217
a6e6ce8e 1218/**
f6e67035 1219 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
a6e6ce8e 1220 *
f6e67035
DW		 1221 * libsas and libata have different approaches for associating a sdev to
1222 * its ata_port.
a6e6ce8e 1223 *
a6e6ce8e 1224 */
f6e67035
DW		 1225int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1226 int queue_depth, int reason)
a6e6ce8e 1227{
a6e6ce8e 1228 struct ata_device *dev;
360f654e 1229 unsigned long flags;
a6e6ce8e 1230
e881a172
MC		 1231 if (reason != SCSI_QDEPTH_DEFAULT)
1232 return -EOPNOTSUPP;
1233
c3c70c44 1234 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1235 return sdev->queue_depth;
1236
1237 dev = ata_scsi_find_dev(ap, sdev);
1238 if (!dev || !ata_dev_enabled(dev))
1239 return sdev->queue_depth;
1240
c3c70c44 1241 /* NCQ enabled? */
360f654e 1242 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1243 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1244 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1245 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1246 queue_depth = 1;
1247 }
360f654e
TH		 1248 spin_unlock_irqrestore(ap->lock, flags);
1249
c3c70c44
TH		 1250 /* limit and apply queue depth */
1251 queue_depth = min(queue_depth, sdev->host->can_queue);
1252 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1253 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1254
1255 if (sdev->queue_depth == queue_depth)
1256 return -EINVAL;
1257
1258 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1259 return queue_depth;
1260}
1261
f6e67035
DW		 1262/**
1263 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1264 * @sdev: SCSI device to configure queue depth for
1265 * @queue_depth: new queue depth
1266 * @reason: calling context
1267 *
1268 * This is libata standard hostt->change_queue_depth callback.
1269 * SCSI will call into this callback when user tries to set queue
1270 * depth via sysfs.
1271 *
1272 * LOCKING:
1273 * SCSI layer (we don't care)
1274 *
1275 * RETURNS:
1276 * Newly configured queue depth.
1277 */
1278int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1279 int reason)
1280{
1281 struct ata_port *ap = ata_shost_to_port(sdev->host);
1282
1283 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1284}
1285
972dcafb
DG		 1286/**
1287 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1288 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1289 *
1290 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1291 * (to start). Perhaps these commands should be preceded by
1292 * CHECK POWER MODE to see what power mode the device is already in.
1293 * [See SAT revision 5 at www.t10.org]
1294 *
1295 * LOCKING:
cca3974e 1296 * spin_lock_irqsave(host lock)
972dcafb
DG		 1297 *
1298 * RETURNS:
1299 * Zero on success, non-zero on error.
1300 */
ad706991 1301static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1302{
542b1444 1303 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1304 struct ata_taskfile *tf = &qc->tf;
ad706991 1305 const u8 *cdb = scmd->cmnd;
972dcafb 1306
2e5704f6
TH		 1307 if (scmd->cmd_len < 5)
1308 goto invalid_fld;
1309
972dcafb
DG		 1310 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1311 tf->protocol = ATA_PROT_NODATA;
542b1444 1312 if (cdb[1] & 0x1) {
972dcafb
DG		 1313 ; /* ignore IMMED bit, violates sat-r05 */
1314 }
542b1444 1315 if (cdb[4] & 0x2)
ae006510 1316 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1317 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1318 goto invalid_fld; /* power conditions not supported */
e31e8531 1319
542b1444 1320 if (cdb[4] & 0x1) {
972dcafb 1321 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1322
1323 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1324 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1325
1326 tf->lbah = 0x0;
1327 tf->lbam = 0x0;
1328 tf->lbal = 0x0;
1329 tf->device |= ATA_LBA;
1330 } else {
1331 /* CHS */
1332 tf->lbal = 0x1; /* sect */
1333 tf->lbam = 0x0; /* cyl low */
1334 tf->lbah = 0x0; /* cyl high */
1335 }
1336
972dcafb 1337 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1338 } else {
2a6e58d2
RW		 1339 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1340 * or S5) causing some drives to spin up and down again.
1341 */
1342 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1343 system_state == SYSTEM_POWER_OFF)
1344 goto skip;
1345
1346 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1347 system_entering_hibernation())
1348 goto skip;
1349
78981a7c
RH		 1350 /* Issue ATA STANDBY IMMEDIATE command */
1351 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1352 }
78981a7c 1353
972dcafb
DG		 1354 /*
1355 * Standby and Idle condition timers could be implemented but that
1356 * would require libata to implement the Power condition mode page
1357 * and allow the user to change it. Changing mode pages requires
1358 * MODE SELECT to be implemented.
1359 */
1360
1361 return 0;
ae006510 1362
2a6e58d2 1363 invalid_fld:
542b1444 1364 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1365 /* "Invalid field in cbd" */
1366 return 1;
2a6e58d2
RW		 1367 skip:
1368 scmd->result = SAM_STAT_GOOD;
1369 return 1;
972dcafb
DG		 1370}
1371
1372
1da177e4
LT		 1373/**
1374 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1375 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1376 *
1377 * Sets up an ATA taskfile to issue FLUSH CACHE or
1378 * FLUSH CACHE EXT.
1379 *
1380 * LOCKING:
cca3974e 1381 * spin_lock_irqsave(host lock)
1da177e4
LT		 1382 *
1383 * RETURNS:
1384 * Zero on success, non-zero on error.
1385 */
ad706991 1386static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1387{
1388 struct ata_taskfile *tf = &qc->tf;
1389
1390 tf->flags |= ATA_TFLAG_DEVICE;
1391 tf->protocol = ATA_PROT_NODATA;
1392
6fc49adb 1393 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1394 tf->command = ATA_CMD_FLUSH_EXT;
1395 else
1396 tf->command = ATA_CMD_FLUSH;
1397
b666da35
TH		 1398 /* flush is critical for IO integrity, consider it an IO command */
1399 qc->flags |= ATA_QCFLAG_IO;
1400
1da177e4
LT		 1401 return 0;
1402}
1403
3aef5231
AL		 1404/**
1405 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1406 * @cdb: SCSI command to translate
3aef5231
AL		 1407 *
1408 * Calculate LBA and transfer length for 6-byte commands.
1409 *
1410 * RETURNS:
1411 * @plba: the LBA
1412 * @plen: the transfer length
1413 */
542b1444 1414static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1415{
1416 u64 lba = 0;
6c7b7d2b 1417 u32 len;
3aef5231
AL		 1418
1419 VPRINTK("six-byte command\n");
1420
6c7b7d2b 1421 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1422 lba |= ((u64)cdb[2]) << 8;
1423 lba |= ((u64)cdb[3]);
3aef5231 1424
6c7b7d2b 1425 len = cdb[4];
3aef5231
AL		 1426
1427 *plba = lba;
1428 *plen = len;
1429}
1430
1431/**
1432 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1433 * @cdb: SCSI command to translate
3aef5231
AL		 1434 *
1435 * Calculate LBA and transfer length for 10-byte commands.
1436 *
1437 * RETURNS:
1438 * @plba: the LBA
1439 * @plen: the transfer length
1440 */
542b1444 1441static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1442{
1443 u64 lba = 0;
1444 u32 len = 0;
1445
1446 VPRINTK("ten-byte command\n");
1447
542b1444
TH		 1448 lba |= ((u64)cdb[2]) << 24;
1449 lba |= ((u64)cdb[3]) << 16;
1450 lba |= ((u64)cdb[4]) << 8;
1451 lba |= ((u64)cdb[5]);
3aef5231 1452
542b1444
TH		 1453 len |= ((u32)cdb[7]) << 8;
1454 len |= ((u32)cdb[8]);
3aef5231
AL		 1455
1456 *plba = lba;
1457 *plen = len;
1458}
1459
1460/**
1461 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1462 * @cdb: SCSI command to translate
3aef5231
AL		 1463 *
1464 * Calculate LBA and transfer length for 16-byte commands.
1465 *
1466 * RETURNS:
1467 * @plba: the LBA
1468 * @plen: the transfer length
1469 */
542b1444 1470static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1471{
1472 u64 lba = 0;
1473 u32 len = 0;
1474
1475 VPRINTK("sixteen-byte command\n");
1476
542b1444
TH		 1477 lba |= ((u64)cdb[2]) << 56;
1478 lba |= ((u64)cdb[3]) << 48;
1479 lba |= ((u64)cdb[4]) << 40;
1480 lba |= ((u64)cdb[5]) << 32;
1481 lba |= ((u64)cdb[6]) << 24;
1482 lba |= ((u64)cdb[7]) << 16;
1483 lba |= ((u64)cdb[8]) << 8;
1484 lba |= ((u64)cdb[9]);
3aef5231 1485
542b1444
TH		 1486 len |= ((u32)cdb[10]) << 24;
1487 len |= ((u32)cdb[11]) << 16;
1488 len |= ((u32)cdb[12]) << 8;
1489 len |= ((u32)cdb[13]);
3aef5231
AL		 1490
1491 *plba = lba;
1492 *plen = len;
1493}
1494
1da177e4
LT		 1495/**
1496 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1497 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1498 *
1499 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1500 *
1501 * LOCKING:
cca3974e 1502 * spin_lock_irqsave(host lock)
1da177e4
LT		 1503 *
1504 * RETURNS:
1505 * Zero on success, non-zero on error.
1506 */
ad706991 1507static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1508{
542b1444 1509 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1510 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1511 struct ata_device *dev = qc->dev;
1da177e4 1512 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1513 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1514 u64 block;
1515 u32 n_block;
1da177e4
LT		 1516
1517 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1518 tf->protocol = ATA_PROT_NODATA;
1da177e4 1519
2e5704f6
TH		 1520 if (cdb[0] == VERIFY) {
1521 if (scmd->cmd_len < 10)
1522 goto invalid_fld;
542b1444 1523 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1524 } else if (cdb[0] == VERIFY_16) {
1525 if (scmd->cmd_len < 16)
1526 goto invalid_fld;
542b1444 1527 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1528 } else
ae006510 1529 goto invalid_fld;
1da177e4 1530
8bf62ece 1531 if (!n_block)
ae006510 1532 goto nothing_to_do;
8bf62ece 1533 if (block >= dev_sectors)
ae006510 1534 goto out_of_range;
8bf62ece 1535 if ((block + n_block) > dev_sectors)
ae006510 1536 goto out_of_range;
1da177e4 1537
07506697
AL		 1538 if (dev->flags & ATA_DFLAG_LBA) {
1539 tf->flags |= ATA_TFLAG_LBA;
1540
c6a33e24
AL		 1541 if (lba_28_ok(block, n_block)) {
1542 /* use LBA28 */
1543 tf->command = ATA_CMD_VERIFY;
1544 tf->device |= (block >> 24) & 0xf;
1545 } else if (lba_48_ok(block, n_block)) {
1546 if (!(dev->flags & ATA_DFLAG_LBA48))
1547 goto out_of_range;
07506697
AL		 1548
1549 /* use LBA48 */
1550 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1551 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1552
8bf62ece 1553 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1554
8bf62ece
AL		 1555 tf->hob_lbah = (block >> 40) & 0xff;
1556 tf->hob_lbam = (block >> 32) & 0xff;
1557 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1558 } else
1559 /* request too large even for LBA48 */
1560 goto out_of_range;
8bf62ece
AL		 1561
1562 tf->nsect = n_block & 0xff;
1da177e4 1563
8bf62ece
AL		 1564 tf->lbah = (block >> 16) & 0xff;
1565 tf->lbam = (block >> 8) & 0xff;
1566 tf->lbal = block & 0xff;
1da177e4 1567
8bf62ece
AL		 1568 tf->device |= ATA_LBA;
1569 } else {
1570 /* CHS */
1571 u32 sect, head, cyl, track;
1572
c6a33e24
AL		 1573 if (!lba_28_ok(block, n_block))
1574 goto out_of_range;
07506697 1575
8bf62ece
AL		 1576 /* Convert LBA to CHS */
1577 track = (u32)block / dev->sectors;
1578 cyl = track / dev->heads;
1579 head = track % dev->heads;
1580 sect = (u32)block % dev->sectors + 1;
1581
c187c4b5
AL		 1582 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1583 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1584
1585 /* Check whether the converted CHS can fit.
1586 Cylinder: 0-65535
8bf62ece
AL		 1587 Head: 0-15
1588 Sector: 1-255*/
2e9edbf8 1589 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1590 goto out_of_range;
2e9edbf8 1591
8bf62ece
AL		 1592 tf->command = ATA_CMD_VERIFY;
1593 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1594 tf->lbal = sect;
1595 tf->lbam = cyl;
1596 tf->lbah = cyl >> 8;
1597 tf->device |= head;
1598 }
1da177e4
LT		 1599
1600 return 0;
ae006510
DG		 1601
1602invalid_fld:
542b1444 1603 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1604 /* "Invalid field in cbd" */
1605 return 1;
1606
1607out_of_range:
542b1444 1608 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1609 /* "Logical Block Address out of range" */
1610 return 1;
1611
1612nothing_to_do:
542b1444 1613 scmd->result = SAM_STAT_GOOD;
ae006510 1614 return 1;
1da177e4
LT		 1615}
1616
1617/**
1618 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1619 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1620 *
1621 * Converts any of six SCSI read/write commands into the
1622 * ATA counterpart, including starting sector (LBA),
1623 * sector count, and taking into account the device's LBA48
1624 * support.
1625 *
1626 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1627 * %WRITE_16 are currently supported.
1628 *
1629 * LOCKING:
cca3974e 1630 * spin_lock_irqsave(host lock)
1da177e4
LT		 1631 *
1632 * RETURNS:
1633 * Zero on success, non-zero on error.
1634 */
ad706991 1635static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1636{
542b1444 1637 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1638 const u8 *cdb = scmd->cmnd;
bd056d7e 1639 unsigned int tf_flags = 0;
3aef5231
AL		 1640 u64 block;
1641 u32 n_block;
bd056d7e 1642 int rc;
1da177e4 1643
542b1444 1644 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1645 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1646
9a3dccc4 1647 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1648 switch (cdb[0]) {
3aef5231
AL		 1649 case READ_10:
1650 case WRITE_10:
2e5704f6
TH		 1651 if (unlikely(scmd->cmd_len < 10))
1652 goto invalid_fld;
542b1444
TH		 1653 scsi_10_lba_len(cdb, &block, &n_block);
1654 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1655 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1656 break;
1657 case READ_6:
1658 case WRITE_6:
2e5704f6
TH		 1659 if (unlikely(scmd->cmd_len < 6))
1660 goto invalid_fld;
542b1444 1661 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1662
1663 /* for 6-byte r/w commands, transfer length 0
1664 * means 256 blocks of data, not 0 block.
1665 */
76b2bf9b
JG		 1666 if (!n_block)
1667 n_block = 256;
3aef5231
AL		 1668 break;
1669 case READ_16:
1670 case WRITE_16:
2e5704f6
TH		 1671 if (unlikely(scmd->cmd_len < 16))
1672 goto invalid_fld;
542b1444
TH		 1673 scsi_16_lba_len(cdb, &block, &n_block);
1674 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1675 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1676 break;
1677 default:
8bf62ece 1678 DPRINTK("no-byte command\n");
ae006510 1679 goto invalid_fld;
1da177e4
LT		 1680 }
1681
8bf62ece
AL		 1682 /* Check and compose ATA command */
1683 if (!n_block)
c187c4b5
AL		 1684 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1685 * length 0 means transfer 0 block of data.
1686 * However, for ATA R/W commands, sector count 0 means
1687 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1688 *
1689 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1690 */
ae006510 1691 goto nothing_to_do;
1da177e4 1692
bd056d7e 1693 qc->flags |= ATA_QCFLAG_IO;
295124dc 1694 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1695
bd056d7e
TH		 1696 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1697 qc->tag);
1698 if (likely(rc == 0))
1699 return 0;
ae006510 1700
bd056d7e
TH		 1701 if (rc == -ERANGE)
1702 goto out_of_range;
1703 /* treat all other errors as -EINVAL, fall through */
ae006510 1704invalid_fld:
542b1444 1705 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1706 /* "Invalid field in cbd" */
1707 return 1;
1708
1709out_of_range:
542b1444 1710 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1711 /* "Logical Block Address out of range" */
1712 return 1;
1713
1714nothing_to_do:
542b1444 1715 scmd->result = SAM_STAT_GOOD;
ae006510 1716 return 1;
1da177e4
LT		 1717}
1718
77853bf2 1719static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1720{
c31f571d 1721 struct ata_port *ap = qc->ap;
1da177e4 1722 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1723 u8 *cdb = cmd->cmnd;
2dcb407e 1724 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1725
1726 /* For ATA pass thru (SAT) commands, generate a sense block if
1727 * user mandated it or if there's an error. Note that if we
1728 * generate because the user forced us to, a check condition
1729 * is generated and the ATA register values are returned
1730 * whether the command completed successfully or not. If there
1731 * was no error, SK, ASC and ASCQ will all be zero.
1732 */
a7dac447 1733 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1734 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1735 ata_gen_passthru_sense(qc);
b095518e
JG		 1736 } else {
1737 if (!need_sense) {
1738 cmd->result = SAM_STAT_GOOD;
1739 } else {
1740 /* TODO: decide which descriptor format to use
1741 * for 48b LBA devices and call that here
1742 * instead of the fixed desc, which is only
1743 * good for smaller LBA (and maybe CHS?)
1744 * devices.
1745 */
750426aa 1746 ata_gen_ata_sense(qc);
b095518e
JG		 1747 }
1748 }
1da177e4 1749
c31f571d 1750 if (need_sense && !ap->ops->error_handler)
44877b4e 1751 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1752
1753 qc->scsidone(cmd);
1754
77853bf2 1755 ata_qc_free(qc);
1da177e4
LT		 1756}
1757
1758/**
1759 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1760 * @dev: ATA device to which the command is addressed
1761 * @cmd: SCSI command to execute
1da177e4
LT		 1762 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1763 *
1764 * Our ->queuecommand() function has decided that the SCSI
1765 * command issued can be directly translated into an ATA
1766 * command, rather than handled internally.
1767 *
1768 * This function sets up an ata_queued_cmd structure for the
1769 * SCSI command, and sends that ata_queued_cmd to the hardware.
1770 *
ae006510
DG		 1771 * The xlat_func argument (actor) returns 0 if ready to execute
1772 * ATA command, else 1 to finish translation. If 1 is returned
1773 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1774 * to be set reflecting an error condition or clean (early)
1775 * termination.
1776 *
1da177e4 1777 * LOCKING:
cca3974e 1778 * spin_lock_irqsave(host lock)
2115ea94
TH		 1779 *
1780 * RETURNS:
1781 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1782 * needs to be deferred.
1da177e4 1783 */
2115ea94 1784static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1785 ata_xlat_func_t xlat_func)
1da177e4 1786{
31cc23b3 1787 struct ata_port *ap = dev->link->ap;
1da177e4 1788 struct ata_queued_cmd *qc;
31cc23b3 1789 int rc;
1da177e4
LT		 1790
1791 VPRINTK("ENTER\n");
1792
b27dcfb0 1793 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 1794 if (!qc)
ae006510 1795 goto err_mem;
1da177e4
LT		 1796
1797 /* data is present; dma-map it */
be7db055 1798 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1799 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1800 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 1801 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 1802 goto err_did;
1da177e4
LT		 1803 }
1804
7120165c 1805 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1806
1807 qc->dma_dir = cmd->sc_data_direction;
1808 }
1809
1810 qc->complete_fn = ata_scsi_qc_complete;
1811
ad706991 1812 if (xlat_func(qc))
ae006510 1813 goto early_finish;
1da177e4 1814
31cc23b3
TH		 1815 if (ap->ops->qc_defer) {
1816 if ((rc = ap->ops->qc_defer(qc)))
1817 goto defer;
1818 }
1819
1da177e4 1820 /* select device, send command to hardware */
8e0e694a 1821 ata_qc_issue(qc);
1da177e4
LT		 1822
1823 VPRINTK("EXIT\n");
2115ea94 1824 return 0;
1da177e4 1825
ae006510 1826early_finish:
2dcb407e 1827 ata_qc_free(qc);
b27dcfb0 1828 cmd->scsi_done(cmd);
ae006510 1829 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1830 return 0;
ae006510
DG		 1831
1832err_did:
1da177e4 1833 ata_qc_free(qc);
ae006510 1834 cmd->result = (DID_ERROR << 16);
b27dcfb0 1835 cmd->scsi_done(cmd);
253b92ec 1836err_mem:
ae006510 1837 DPRINTK("EXIT - internal\n");
2115ea94 1838 return 0;
3dc1d881
TH		 1839
1840defer:
31cc23b3 1841 ata_qc_free(qc);
3dc1d881 1842 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1843 if (rc == ATA_DEFER_LINK)
1844 return SCSI_MLQUEUE_DEVICE_BUSY;
1845 else
1846 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1847}
1848
1849/**
1850 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1851 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1852 * @flags: unsigned long variable to store irq enable status
1853 * @copy_in: copy in from user buffer
1da177e4 1854 *
87340e98 1855 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1856 *
1857 * LOCKING:
87340e98 1858 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1859 *
1860 * RETURNS:
87340e98 1861 * Pointer to response buffer.
1da177e4 1862 */
87340e98
TH		 1863static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1864 unsigned long *flags)
1da177e4 1865{
87340e98 1866 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1867
87340e98
TH		 1868 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1869 if (copy_in)
1870 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1871 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1872 return ata_scsi_rbuf;
1da177e4
LT		 1873}
1874
1875/**
1876 * ata_scsi_rbuf_put - Unmap response buffer.
1877 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1878 * @copy_out: copy out result
1879 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1880 *
87340e98
TH		 1881 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1882 * @copy_back is true.
1da177e4
LT		 1883 *
1884 * LOCKING:
87340e98 1885 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1886 */
87340e98
TH		 1887static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1888 unsigned long *flags)
1da177e4 1889{
87340e98
TH		 1890 if (copy_out)
1891 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1892 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1893 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1894}
1895
1896/**
1897 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1898 * @args: device IDENTIFY data / SCSI command of interest.
1899 * @actor: Callback hook for desired SCSI command simulator
1900 *
1901 * Takes care of the hard work of simulating a SCSI command...
1902 * Mapping the response buffer, calling the command's handler,
1903 * and handling the handler's return value. This return value
1904 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1905 * completed successfully (0), or not (in which case cmd->result
1906 * and sense buffer are assumed to be set).
1da177e4
LT		 1907 *
1908 * LOCKING:
cca3974e 1909 * spin_lock_irqsave(host lock)
1da177e4 1910 */
f0761be3 1911static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1912 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1913{
1914 u8 *rbuf;
87340e98 1915 unsigned int rc;
1da177e4 1916 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1917 unsigned long flags;
1918
87340e98
TH		 1919 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1920 rc = actor(args, rbuf);
1921 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1922
ae006510 1923 if (rc == 0)
1da177e4 1924 cmd->result = SAM_STAT_GOOD;
ae006510 1925 args->done(cmd);
1da177e4
LT		 1926}
1927
1928/**
1929 * ata_scsiop_inq_std - Simulate INQUIRY command
1930 * @args: device IDENTIFY data / SCSI command of interest.
1931 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1932 *
1933 * Returns standard device identification data associated
b142eb65 1934 * with non-VPD INQUIRY command output.
1da177e4
LT		 1935 *
1936 * LOCKING:
cca3974e 1937 * spin_lock_irqsave(host lock)
1da177e4 1938 */
87340e98 1939static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1940{
87340e98
TH		 1941 const u8 versions[] = {
1942 0x60, /* SAM-3 (no version claimed) */
1943
1944 0x03,
1945 0x20, /* SBC-2 (no version claimed) */
1946
1947 0x02,
1948 0x60 /* SPC-3 (no version claimed) */
1949 };
1da177e4
LT		 1950 u8 hdr[] = {
1951 TYPE_DISK,
1952 0,
1953 0x5, /* claim SPC-3 version compatibility */
1954 2,
1955 95 - 4
1956 };
1957
87340e98
TH		 1958 VPRINTK("ENTER\n");
1959
1da177e4
LT		 1960 /* set scsi removeable (RMB) bit per ata bit */
1961 if (ata_id_removeable(args->id))
1962 hdr[1] |= (1 << 7);
1963
1da177e4 1964 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1965 memcpy(&rbuf[8], "ATA ", 8);
1966 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1967 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1968
87340e98
TH		 1969 if (rbuf[32] == 0 || rbuf[32] == ' ')
1970 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1971
87340e98 1972 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1973
1974 return 0;
1975}
1976
1977/**
b142eb65 1978 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1979 * @args: device IDENTIFY data / SCSI command of interest.
1980 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1981 *
b142eb65 1982 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1983 *
1984 * LOCKING:
cca3974e 1985 * spin_lock_irqsave(host lock)
1da177e4 1986 */
87340e98 1987static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1988{
1989 const u8 pages[] = {
1990 0x00, /* page 0x00, this page */
1991 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 1992 0x83, /* page 0x83, device ident page */
1993 0x89, /* page 0x89, ata info page */
18f0f978 1994 0xb0, /* page 0xb0, block limits page */
1e9dbc92 1995 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 1996 0xb2, /* page 0xb2, thin provisioning page */
1da177e4 1997 };
1da177e4 1998
87340e98
TH		 1999 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2000 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2001 return 0;
2002}
2003
2004/**
b142eb65 2005 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2006 * @args: device IDENTIFY data / SCSI command of interest.
2007 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2008 *
2009 * Returns ATA device serial number.
2010 *
2011 * LOCKING:
cca3974e 2012 * spin_lock_irqsave(host lock)
1da177e4 2013 */
87340e98 2014static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2015{
2016 const u8 hdr[] = {
2017 0,
2018 0x80, /* this page code */
2019 0,
a0cf733b 2020 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2021 };
1da177e4 2022
87340e98
TH		 2023 memcpy(rbuf, hdr, sizeof(hdr));
2024 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2025 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2026 return 0;
2027}
2028
1da177e4 2029/**
b142eb65 2030 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2031 * @args: device IDENTIFY data / SCSI command of interest.
2032 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2033 *
b142eb65
JG		 2034 * Yields two logical unit device identification designators:
2035 * - vendor specific ASCII containing the ATA serial number
2036 * - SAT defined "t10 vendor id based" containing ASCII vendor
2037 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2038 *
2039 * LOCKING:
cca3974e 2040 * spin_lock_irqsave(host lock)
1da177e4 2041 */
87340e98 2042static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2043{
b142eb65 2044 const int sat_model_serial_desc_len = 68;
87340e98 2045 int num;
1da177e4 2046
b142eb65
JG		 2047 rbuf[1] = 0x83; /* this page code */
2048 num = 4;
2049
87340e98
TH		 2050 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2051 rbuf[num + 0] = 2;
2052 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2053 num += 4;
2054 ata_id_string(args->id, (unsigned char *) rbuf + num,
2055 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2056 num += ATA_ID_SERNO_LEN;
2057
2058 /* SAT defined lu model and serial numbers descriptor */
2059 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2060 rbuf[num + 0] = 2;
2061 rbuf[num + 1] = 1;
2062 rbuf[num + 3] = sat_model_serial_desc_len;
2063 num += 4;
2064 memcpy(rbuf + num, "ATA ", 8);
2065 num += 8;
2066 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2067 ATA_ID_PROD_LEN);
2068 num += ATA_ID_PROD_LEN;
2069 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2070 ATA_ID_SERNO_LEN);
2071 num += ATA_ID_SERNO_LEN;
2072
6b3b9d73
HR		 2073 if (ata_id_has_wwn(args->id)) {
2074 /* SAT defined lu world wide name */
2075 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2076 rbuf[num + 0] = 1;
2077 rbuf[num + 1] = 3;
2078 rbuf[num + 3] = ATA_ID_WWN_LEN;
2079 num += 4;
2080 ata_id_string(args->id, (unsigned char *) rbuf + num,
2081 ATA_ID_WWN, ATA_ID_WWN_LEN);
2082 num += ATA_ID_WWN_LEN;
2083 }
b142eb65 2084 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2085 return 0;
2086}
2087
ad355b46
JG		 2088/**
2089 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2090 * @args: device IDENTIFY data / SCSI command of interest.
2091 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2092 *
2093 * Yields SAT-specified ATA VPD page.
2094 *
2095 * LOCKING:
2096 * spin_lock_irqsave(host lock)
2097 */
87340e98 2098static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2099{
ad355b46 2100 struct ata_taskfile tf;
ad355b46 2101
ad355b46
JG		 2102 memset(&tf, 0, sizeof(tf));
2103
87340e98
TH		 2104 rbuf[1] = 0x89; /* our page code */
2105 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2106 rbuf[3] = (0x238 & 0xff);
ad355b46 2107
87340e98
TH		 2108 memcpy(&rbuf[8], "linux ", 8);
2109 memcpy(&rbuf[16], "libata ", 16);
2110 memcpy(&rbuf[32], DRV_VERSION, 4);
2111 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2112
2113 /* we don't store the ATA device signature, so we fake it */
2114
2115 tf.command = ATA_DRDY; /* really, this is Status reg */
2116 tf.lbal = 0x1;
2117 tf.nsect = 0x1;
2118
87340e98
TH		 2119 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2120 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2121
87340e98 2122 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2123
87340e98 2124 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2125 return 0;
2126}
2127
18f0f978
CH		 2128static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2129{
295124dc 2130 u16 min_io_sectors;
18f0f978
CH		 2131
2132 rbuf[1] = 0xb0;
2133 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2134
2135 /*
2136 * Optimal transfer length granularity.
2137 *
2138 * This is always one physical block, but for disks with a smaller
2139 * logical than physical sector size we need to figure out what the
2140 * latter is.
2141 */
295124dc 2142 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2143 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2144
2145 /*
2146 * Optimal unmap granularity.
2147 *
2148 * The ATA spec doesn't even know about a granularity or alignment
2149 * for the TRIM command. We can leave away most of the unmap related
2150 * VPD page entries, but we have specifify a granularity to signal
2151 * that we support some form of unmap - in thise case via WRITE SAME
2152 * with the unmap bit set.
2153 */
e78db4df 2154 if (ata_id_has_trim(args->id)) {
5f4e2066 2155 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
18f0f978 2156 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2157 }
18f0f978
CH		 2158
2159 return 0;
2160}
2161
1e9dbc92
MW		 2162static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2163{
4bca3286
MP		 2164 int form_factor = ata_id_form_factor(args->id);
2165 int media_rotation_rate = ata_id_rotation_rate(args->id);
2166
1e9dbc92
MW		 2167 rbuf[1] = 0xb1;
2168 rbuf[3] = 0x3c;
4bca3286
MP		 2169 rbuf[4] = media_rotation_rate >> 8;
2170 rbuf[5] = media_rotation_rate;
2171 rbuf[7] = form_factor;
1e9dbc92
MW		 2172
2173 return 0;
2174}
2175
02e0a604
MP		 2176static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2177{
2178 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2179 rbuf[1] = 0xb2;
2180 rbuf[3] = 0x4;
2181 rbuf[5] = 1 << 6; /* TPWS */
2182
2183 return 0;
2184}
2185
1da177e4 2186/**
0cba632b 2187 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2188 * @args: device IDENTIFY data / SCSI command of interest.
2189 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2190 *
2191 * No operation. Simply returns success to caller, to indicate
2192 * that the caller should successfully complete this SCSI command.
2193 *
2194 * LOCKING:
cca3974e 2195 * spin_lock_irqsave(host lock)
1da177e4 2196 */
87340e98 2197static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2198{
2199 VPRINTK("ENTER\n");
2200 return 0;
2201}
2202
1da177e4
LT		 2203/**
2204 * ata_msense_caching - Simulate MODE SENSE caching info page
2205 * @id: device IDENTIFY data
87340e98 2206 * @buf: output buffer
1da177e4
LT		 2207 *
2208 * Generate a caching info page, which conditionally indicates
2209 * write caching to the SCSI layer, depending on device
2210 * capabilities.
2211 *
2212 * LOCKING:
2213 * None.
2214 */
87340e98 2215static unsigned int ata_msense_caching(u16 *id, u8 *buf)
1da177e4 2216{
87340e98 2217 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
1da177e4 2218 if (ata_id_wcache_enabled(id))
87340e98 2219 buf[2] |= (1 << 2); /* write cache enable */
1da177e4 2220 if (!ata_id_rahead_enabled(id))
87340e98
TH		 2221 buf[12] |= (1 << 5); /* disable read ahead */
2222 return sizeof(def_cache_mpage);
1da177e4
LT		 2223}
2224
2225/**
2226 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2227 * @buf: output buffer
1da177e4
LT		 2228 *
2229 * Generate a generic MODE SENSE control mode page.
2230 *
2231 * LOCKING:
2232 * None.
2233 */
87340e98 2234static unsigned int ata_msense_ctl_mode(u8 *buf)
1da177e4 2235{
87340e98 2236 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
00ac37f5 2237 return sizeof(def_control_mpage);
1da177e4
LT		 2238}
2239
2240/**
2241 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2242 * @buf: output buffer
1da177e4
LT		 2243 *
2244 * Generate a generic MODE SENSE r/w error recovery page.
2245 *
2246 * LOCKING:
2247 * None.
2248 */
87340e98 2249static unsigned int ata_msense_rw_recovery(u8 *buf)
1da177e4 2250{
87340e98 2251 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
00ac37f5 2252 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2253}
2254
48bdc8ec
JA		 2255/*
2256 * We can turn this into a real blacklist if it's needed, for now just
2257 * blacklist any Maxtor BANC1G10 revision firmware
2258 */
2259static int ata_dev_supports_fua(u16 *id)
2260{
a0cf733b 2261 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2262
c3c013a2
JG		 2263 if (!libata_fua)
2264 return 0;
48bdc8ec
JA		 2265 if (!ata_id_has_fua(id))
2266 return 0;
2267
a0cf733b
TH		 2268 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2269 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2270
2e02671d 2271 if (strcmp(model, "Maxtor"))
48bdc8ec 2272 return 1;
2e02671d 2273 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2274 return 1;
2275
2276 return 0; /* blacklisted */
2277}
2278
1da177e4
LT		 2279/**
2280 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2281 * @args: device IDENTIFY data / SCSI command of interest.
2282 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2283 *
00ac37f5
DG		 2284 * Simulate MODE SENSE commands. Assume this is invoked for direct
2285 * access devices (e.g. disks) only. There should be no block
2286 * descriptor for other device types.
1da177e4
LT		 2287 *
2288 * LOCKING:
cca3974e 2289 * spin_lock_irqsave(host lock)
1da177e4 2290 */
87340e98 2291static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2292{
9a3dccc4 2293 struct ata_device *dev = args->dev;
87340e98 2294 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2295 const u8 sat_blk_desc[] = {
2296 0, 0, 0, 0, /* number of blocks: sat unspecified */
2297 0,
2298 0, 0x2, 0x0 /* block length: 512 bytes */
2299 };
2300 u8 pg, spg;
87340e98 2301 unsigned int ebd, page_control, six_byte;
9a3dccc4 2302 u8 dpofua;
1da177e4
LT		 2303
2304 VPRINTK("ENTER\n");
2305
2306 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2307 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2308 /*
2309 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2310 */
00ac37f5 2311
1da177e4 2312 page_control = scsicmd[2] >> 6;
ae006510
DG		 2313 switch (page_control) {
2314 case 0: /* current */
2315 break; /* supported */
2316 case 3: /* saved */
2317 goto saving_not_supp;
2318 case 1: /* changeable */
2319 case 2: /* defaults */
2320 default:
2321 goto invalid_fld;
2322 }
1da177e4 2323
87340e98
TH		 2324 if (six_byte)
2325 p += 4 + (ebd ? 8 : 0);
2326 else
2327 p += 8 + (ebd ? 8 : 0);
1da177e4 2328
00ac37f5
DG		 2329 pg = scsicmd[2] & 0x3f;
2330 spg = scsicmd[3];
2331 /*
2332 * No mode subpages supported (yet) but asking for _all_
2333 * subpages may be valid
2334 */
2335 if (spg && (spg != ALL_SUB_MPAGES))
2336 goto invalid_fld;
2337
2338 switch(pg) {
2339 case RW_RECOVERY_MPAGE:
87340e98 2340 p += ata_msense_rw_recovery(p);
1da177e4
LT		 2341 break;
2342
00ac37f5 2343 case CACHE_MPAGE:
87340e98 2344 p += ata_msense_caching(args->id, p);
1da177e4
LT		 2345 break;
2346
87340e98
TH		 2347 case CONTROL_MPAGE:
2348 p += ata_msense_ctl_mode(p);
1da177e4 2349 break;
1da177e4 2350
00ac37f5 2351 case ALL_MPAGES:
87340e98
TH		 2352 p += ata_msense_rw_recovery(p);
2353 p += ata_msense_caching(args->id, p);
2354 p += ata_msense_ctl_mode(p);
1da177e4
LT		 2355 break;
2356
2357 default: /* invalid page code */
ae006510 2358 goto invalid_fld;
1da177e4
LT		 2359 }
2360
9a3dccc4 2361 dpofua = 0;
f79d409f 2362 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2363 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2364 dpofua = 1 << 4;
2365
1da177e4 2366 if (six_byte) {
87340e98
TH		 2367 rbuf[0] = p - rbuf - 1;
2368 rbuf[2] |= dpofua;
00ac37f5 2369 if (ebd) {
87340e98
TH		 2370 rbuf[3] = sizeof(sat_blk_desc);
2371 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2372 }
1da177e4 2373 } else {
87340e98
TH		 2374 unsigned int output_len = p - rbuf - 2;
2375
1da177e4 2376 rbuf[0] = output_len >> 8;
87340e98
TH		 2377 rbuf[1] = output_len;
2378 rbuf[3] |= dpofua;
00ac37f5 2379 if (ebd) {
87340e98
TH		 2380 rbuf[7] = sizeof(sat_blk_desc);
2381 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2382 }
1da177e4 2383 }
1da177e4 2384 return 0;
ae006510
DG		 2385
2386invalid_fld:
2387 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2388 /* "Invalid field in cbd" */
2389 return 1;
2390
2391saving_not_supp:
2392 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2393 /* "Saving parameters not supported" */
2394 return 1;
1da177e4
LT		 2395}
2396
2397/**
2398 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2399 * @args: device IDENTIFY data / SCSI command of interest.
2400 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2401 *
2402 * Simulate READ CAPACITY commands.
2403 *
2404 * LOCKING:
6a36261e 2405 * None.
1da177e4 2406 */
87340e98 2407static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2408{
61d79a8e
MP		 2409 struct ata_device *dev = args->dev;
2410 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2411 u32 sector_size; /* physical sector size in bytes */
2412 u8 log2_per_phys;
2413 u16 lowest_aligned;
2414
2415 sector_size = ata_id_logical_sector_size(dev->id);
2416 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2417 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2418
2419 VPRINTK("ENTER\n");
2420
1da177e4 2421 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2422 if (last_lba >= 0xffffffffULL)
2423 last_lba = 0xffffffff;
0c144d0d 2424
1da177e4 2425 /* sector count, 32-bit */
87340e98
TH		 2426 rbuf[0] = last_lba >> (8 * 3);
2427 rbuf[1] = last_lba >> (8 * 2);
2428 rbuf[2] = last_lba >> (8 * 1);
2429 rbuf[3] = last_lba;
1da177e4
LT		 2430
2431 /* sector size */
295124dc
GG		 2432 rbuf[4] = sector_size >> (8 * 3);
2433 rbuf[5] = sector_size >> (8 * 2);
2434 rbuf[6] = sector_size >> (8 * 1);
2435 rbuf[7] = sector_size;
1da177e4
LT		 2436 } else {
2437 /* sector count, 64-bit */
87340e98
TH		 2438 rbuf[0] = last_lba >> (8 * 7);
2439 rbuf[1] = last_lba >> (8 * 6);
2440 rbuf[2] = last_lba >> (8 * 5);
2441 rbuf[3] = last_lba >> (8 * 4);
2442 rbuf[4] = last_lba >> (8 * 3);
2443 rbuf[5] = last_lba >> (8 * 2);
2444 rbuf[6] = last_lba >> (8 * 1);
2445 rbuf[7] = last_lba;
1da177e4
LT		 2446
2447 /* sector size */
295124dc
GG		 2448 rbuf[ 8] = sector_size >> (8 * 3);
2449 rbuf[ 9] = sector_size >> (8 * 2);
2450 rbuf[10] = sector_size >> (8 * 1);
2451 rbuf[11] = sector_size;
61d79a8e
MP		 2452
2453 rbuf[12] = 0;
295124dc 2454 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2455 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2456 rbuf[15] = lowest_aligned;
18f0f978 2457
e78db4df
MP		 2458 if (ata_id_has_trim(args->id)) {
2459 rbuf[14] |= 0x80; /* TPE */
2460
2461 if (ata_id_has_zero_after_trim(args->id))
2462 rbuf[14] |= 0x40; /* TPRZ */
2463 }
1da177e4
LT		 2464 }
2465
2466 return 0;
2467}
2468
2469/**
2470 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2471 * @args: device IDENTIFY data / SCSI command of interest.
2472 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2473 *
2474 * Simulate REPORT LUNS command.
2475 *
2476 * LOCKING:
cca3974e 2477 * spin_lock_irqsave(host lock)
1da177e4 2478 */
87340e98 2479static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2480{
2481 VPRINTK("ENTER\n");
2482 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2483
2484 return 0;
2485}
2486
77853bf2 2487static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2488{
74e6c8c3 2489 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2490 /* FIXME: not quite right; we don't want the
2491 * translation of taskfile registers into
2492 * a sense descriptors, since that's only
2493 * correct for ATA, not ATAPI
2494 */
750426aa 2495 ata_gen_passthru_sense(qc);
74e6c8c3 2496 }
a939c963 2497
c6e6e666 2498 qc->scsidone(qc->scsicmd);
77853bf2 2499 ata_qc_free(qc);
c6e6e666 2500}
a939c963 2501
c6e6e666
JG		 2502/* is it pointless to prefer PIO for "safety reasons"? */
2503static inline int ata_pio_use_silly(struct ata_port *ap)
2504{
2505 return (ap->flags & ATA_FLAG_PIO_DMA);
2506}
2507
2508static void atapi_request_sense(struct ata_queued_cmd *qc)
2509{
2510 struct ata_port *ap = qc->ap;
2511 struct scsi_cmnd *cmd = qc->scsicmd;
2512
2513 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2514
2515 /* FIXME: is this needed? */
7ccd720d 2516 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2517
127102ae 2518#ifdef CONFIG_ATA_SFF
855d854a
JB		 2519 if (ap->ops->sff_tf_read)
2520 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2521#endif
c6e6e666
JG		 2522
2523 /* fill these in, for the case where they are -not- overwritten */
2524 cmd->sense_buffer[0] = 0x70;
2525 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2526
2527 ata_qc_reinit(qc);
2528
93f8fecb 2529 /* setup sg table and init transfer direction */
cadb7345 2530 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2531 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2532 qc->dma_dir = DMA_FROM_DEVICE;
2533
6e7846e9 2534 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2535 qc->cdb[0] = REQUEST_SENSE;
2536 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2537
2538 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2539 qc->tf.command = ATA_CMD_PACKET;
2540
c6e6e666 2541 if (ata_pio_use_silly(ap)) {
0dc36888 2542 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2543 qc->tf.feature |= ATAPI_PKT_DMA;
2544 } else {
0dc36888 2545 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2546 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2547 qc->tf.lbah = 0;
c6e6e666 2548 }
a939c963
JG		 2549 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2550
c6e6e666 2551 qc->complete_fn = atapi_sense_complete;
a939c963 2552
8e0e694a 2553 ata_qc_issue(qc);
a939c963
JG		 2554
2555 DPRINTK("EXIT\n");
2556}
2557
77853bf2 2558static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2559{
2560 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2561 unsigned int err_mask = qc->err_mask;
1da177e4 2562
a7dac447 2563 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2564
246619da
TH		 2565 /* handle completion from new EH */
2566 if (unlikely(qc->ap->ops->error_handler &&
2567 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2568
2569 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2570 /* FIXME: not quite right; we don't want the
2571 * translation of taskfile registers into a
2572 * sense descriptors, since that's only
2573 * correct for ATA, not ATAPI
2574 */
750426aa 2575 ata_gen_passthru_sense(qc);
246619da
TH		 2576 }
2577
22aac089
TH		 2578 /* SCSI EH automatically locks door if sdev->locked is
2579 * set. Sometimes door lock request continues to
2580 * fail, for example, when no media is present. This
2581 * creates a loop - SCSI EH issues door lock which
2582 * fails and gets invoked again to acquire sense data
2583 * for the failed command.
2584 *
2585 * If door lock fails, always clear sdev->locked to
2586 * avoid this infinite loop.
2a5f07b5
TH		 2587 *
2588 * This may happen before SCSI scan is complete. Make
2589 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2590 */
2a5f07b5 2591 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2592 qc->dev->sdev->locked = 0;
2593
246619da
TH		 2594 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2595 qc->scsidone(cmd);
2596 ata_qc_free(qc);
2597 return;
2598 }
2599
2600 /* successful completion or old EH failure path */
a7dac447 2601 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2602 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2603 atapi_request_sense(qc);
77853bf2 2604 return;
74e6c8c3 2605 } else if (unlikely(err_mask)) {
a7dac447
JG		 2606 /* FIXME: not quite right; we don't want the
2607 * translation of taskfile registers into
2608 * a sense descriptors, since that's only
2609 * correct for ATA, not ATAPI
2610 */
750426aa 2611 ata_gen_passthru_sense(qc);
74e6c8c3 2612 } else {
1da177e4
LT		 2613 u8 *scsicmd = cmd->cmnd;
2614
fd71da46 2615 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2616 unsigned long flags;
87340e98 2617 u8 *buf;
b445c568 2618
87340e98 2619 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2620
2621 /* ATAPI devices typically report zero for their SCSI version,
2622 * and sometimes deviate from the spec WRT response data
2623 * format. If SCSI version is reported as zero like normal,
2624 * then we make the following fixups: 1) Fake MMC-5 version,
2625 * to indicate to the Linux scsi midlayer this is a modern
2626 * device. 2) Ensure response data format / ATAPI information
2627 * are always correct.
a15dbeb4
JG		 2628 */
2629 if (buf[2] == 0) {
2630 buf[2] = 0x5;
2631 buf[3] = 0x32;
2632 }
2633
87340e98 2634 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2635 }
a15dbeb4 2636
1da177e4
LT		 2637 cmd->result = SAM_STAT_GOOD;
2638 }
2639
2640 qc->scsidone(cmd);
77853bf2 2641 ata_qc_free(qc);
1da177e4
LT		 2642}
2643/**
2644 * atapi_xlat - Initialize PACKET taskfile
2645 * @qc: command structure to be initialized
1da177e4
LT		 2646 *
2647 * LOCKING:
cca3974e 2648 * spin_lock_irqsave(host lock)
1da177e4
LT		 2649 *
2650 * RETURNS:
2651 * Zero on success, non-zero on failure.
2652 */
ad706991 2653static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2654{
542b1444 2655 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2656 struct ata_device *dev = qc->dev;
542b1444 2657 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2658 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2659 unsigned int nbytes;
1da177e4 2660
2e5704f6
TH		 2661 memset(qc->cdb, 0, dev->cdb_len);
2662 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2663
2664 qc->complete_fn = atapi_qc_complete;
2665
2666 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2667 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2668 qc->tf.flags |= ATA_TFLAG_WRITE;
2669 DPRINTK("direction: write\n");
2670 }
2671
2672 qc->tf.command = ATA_CMD_PACKET;
aacda375 2673 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2674
2675 /* check whether ATAPI DMA is safe */
5895ef9a 2676 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2677 using_pio = 1;
1da177e4 2678
e190222d
TH		 2679 /* Some controller variants snoop this value for Packet
2680 * transfers to do state machine and FIFO management. Thus we
2681 * want to set it properly, and for DMA where it is
2682 * effectively meaningless.
2683 */
aacda375 2684 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2685
e190222d
TH		 2686 /* Most ATAPI devices which honor transfer chunk size don't
2687 * behave according to the spec when odd chunk size which
2688 * matches the transfer length is specified. If the number of
2689 * bytes to transfer is 2n+1. According to the spec, what
2690 * should happen is to indicate that 2n+1 is going to be
2691 * transferred and transfer 2n+2 bytes where the last byte is
2692 * padding.
2693 *
2694 * In practice, this doesn't happen. ATAPI devices first
2695 * indicate and transfer 2n bytes and then indicate and
2696 * transfer 2 bytes where the last byte is padding.
2697 *
2698 * This inconsistency confuses several controllers which
2699 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2700 * These controllers use actual number of transferred bytes to
2701 * update DMA poitner and transfer of 4n+2 bytes make those
2702 * controller push DMA pointer by 4n+4 bytes because SATA data
2703 * FISes are aligned to 4 bytes. This causes data corruption
2704 * and buffer overrun.
2705 *
2706 * Always setting nbytes to even number solves this problem
2707 * because then ATAPI devices don't have to split data at 2n
2708 * boundaries.
2709 */
2710 if (nbytes & 0x1)
2711 nbytes++;
2712
2db78dd3
AC		 2713 qc->tf.lbam = (nbytes & 0xFF);
2714 qc->tf.lbah = (nbytes >> 8);
2715
5895ef9a
TH		 2716 if (nodata)
2717 qc->tf.protocol = ATAPI_PROT_NODATA;
2718 else if (using_pio)
2719 qc->tf.protocol = ATAPI_PROT_PIO;
2720 else {
e00f1ff3 2721 /* DMA data xfer */
0dc36888 2722 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2723 qc->tf.feature |= ATAPI_PKT_DMA;
2724
91163006
TH		 2725 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2726 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2727 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2728 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2729 }
2730
2db78dd3
AC		 2731
2732 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2733 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2734 return 0;
2735}
2736
2dcb407e 2737static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2738{
071f44b1 2739 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2740 if (likely(devno < ata_link_max_devices(&ap->link)))
2741 return &ap->link.device[devno];
2742 } else {
2743 if (likely(devno < ap->nr_pmp_links))
2744 return &ap->pmp_link[devno].device[0];
2745 }
2746
ab5b3a5b
TH		 2747 return NULL;
2748}
2749
2dcb407e
JG		 2750static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2751 const struct scsi_device *scsidev)
ab5b3a5b 2752{
41bda9c9
TH		 2753 int devno;
2754
ab5b3a5b 2755 /* skip commands not addressed to targets we simulate */
071f44b1 2756 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2757 if (unlikely(scsidev->channel || scsidev->lun))
2758 return NULL;
2759 devno = scsidev->id;
2760 } else {
2761 if (unlikely(scsidev->id || scsidev->lun))
2762 return NULL;
2763 devno = scsidev->channel;
2764 }
ab5b3a5b 2765
41bda9c9 2766 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2767}
2768
1da177e4
LT		 2769/**
2770 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2771 * @ap: ATA port to which the device is attached
2772 * @scsidev: SCSI device from which we derive the ATA device
2773 *
2774 * Given various information provided in struct scsi_cmnd,
2775 * map that onto an ATA bus, and using that mapping
2776 * determine which ata_device is associated with the
2777 * SCSI command to be sent.
2778 *
2779 * LOCKING:
cca3974e 2780 * spin_lock_irqsave(host lock)
1da177e4
LT		 2781 *
2782 * RETURNS:
2783 * Associated ATA device, or %NULL if not found.
2784 */
1da177e4 2785static struct ata_device *
057ace5e 2786ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2787{
ab5b3a5b 2788 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2789
2486fa56 2790 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2791 return NULL;
2792
1da177e4
LT		 2793 return dev;
2794}
2795
b095518e
JG		 2796/*
2797 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2798 * @byte1: Byte 1 from pass-thru CDB.
2799 *
2800 * RETURNS:
2801 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2802 */
2803static u8
2804ata_scsi_map_proto(u8 byte1)
2805{
2806 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2807 case 3: /* Non-data */
2808 return ATA_PROT_NODATA;
2809
2810 case 6: /* DMA */
2811 case 10: /* UDMA Data-in */
2812 case 11: /* UDMA Data-Out */
2813 return ATA_PROT_DMA;
2814
2815 case 4: /* PIO Data-in */
2816 case 5: /* PIO Data-out */
2817 return ATA_PROT_PIO;
2818
2819 case 0: /* Hard Reset */
2820 case 1: /* SRST */
2821 case 8: /* Device Diagnostic */
2822 case 9: /* Device Reset */
2823 case 7: /* DMA Queued */
2824 case 12: /* FPDMA */
2825 case 15: /* Return Response Info */
2826 default: /* Reserved */
2827 break;
b095518e
JG		 2828 }
2829
2830 return ATA_PROT_UNKNOWN;
2831}
2832
2833/**
2834 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2835 * @qc: command structure to be initialized
b095518e
JG		 2836 *
2837 * Handles either 12 or 16-byte versions of the CDB.
2838 *
2839 * RETURNS:
2840 * Zero on success, non-zero on failure.
2841 */
ad706991 2842static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2843{
2844 struct ata_taskfile *tf = &(qc->tf);
542b1444 2845 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2846 struct ata_device *dev = qc->dev;
ad706991 2847 const u8 *cdb = scmd->cmnd;
b095518e 2848
542b1444 2849 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2850 goto invalid_fld;
8190bdb9 2851
b095518e
JG		 2852 /*
2853 * 12 and 16 byte CDBs use different offsets to
2854 * provide the various register values.
2855 */
542b1444 2856 if (cdb[0] == ATA_16) {
b095518e
JG		 2857 /*
2858 * 16-byte CDB - may contain extended commands.
2859 *
2860 * If that is the case, copy the upper byte register values.
2861 */
542b1444
TH		 2862 if (cdb[1] & 0x01) {
2863 tf->hob_feature = cdb[3];
2864 tf->hob_nsect = cdb[5];
2865 tf->hob_lbal = cdb[7];
2866 tf->hob_lbam = cdb[9];
2867 tf->hob_lbah = cdb[11];
b095518e
JG		 2868 tf->flags |= ATA_TFLAG_LBA48;
2869 } else
2870 tf->flags &= ~ATA_TFLAG_LBA48;
2871
2872 /*
2873 * Always copy low byte, device and command registers.
2874 */
542b1444
TH		 2875 tf->feature = cdb[4];
2876 tf->nsect = cdb[6];
2877 tf->lbal = cdb[8];
2878 tf->lbam = cdb[10];
2879 tf->lbah = cdb[12];
2880 tf->device = cdb[13];
2881 tf->command = cdb[14];
b095518e
JG		 2882 } else {
2883 /*
2884 * 12-byte CDB - incapable of extended commands.
2885 */
2886 tf->flags &= ~ATA_TFLAG_LBA48;
2887
542b1444
TH		 2888 tf->feature = cdb[3];
2889 tf->nsect = cdb[4];
2890 tf->lbal = cdb[5];
2891 tf->lbam = cdb[6];
2892 tf->lbah = cdb[7];
2893 tf->device = cdb[8];
2894 tf->command = cdb[9];
b095518e 2895 }
fa4453c4
AL		 2896
2897 /* enforce correct master/slave bit */
2898 tf->device = dev->devno ?
2899 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2900
bd30add8 2901 switch (tf->command) {
295124dc 2902 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 2903 case ATA_CMD_READ_LONG:
2904 case ATA_CMD_READ_LONG_ONCE:
2905 case ATA_CMD_WRITE_LONG:
2906 case ATA_CMD_WRITE_LONG_ONCE:
2907 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2908 goto invalid_fld;
2909 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 2910 break;
2911
2912 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2913 case ATA_CMD_CFA_WRITE_NE:
2914 case ATA_CMD_CFA_TRANS_SECT:
2915 case ATA_CMD_CFA_WRITE_MULT_NE:
2916 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2917 case ATA_CMD_READ:
2918 case ATA_CMD_READ_EXT:
2919 case ATA_CMD_READ_QUEUED:
2920 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2921 case ATA_CMD_FPDMA_READ:
2922 case ATA_CMD_READ_MULTI:
2923 case ATA_CMD_READ_MULTI_EXT:
2924 case ATA_CMD_PIO_READ:
2925 case ATA_CMD_PIO_READ_EXT:
2926 case ATA_CMD_READ_STREAM_DMA_EXT:
2927 case ATA_CMD_READ_STREAM_EXT:
2928 case ATA_CMD_VERIFY:
2929 case ATA_CMD_VERIFY_EXT:
2930 case ATA_CMD_WRITE:
2931 case ATA_CMD_WRITE_EXT:
2932 case ATA_CMD_WRITE_FUA_EXT:
2933 case ATA_CMD_WRITE_QUEUED:
2934 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2935 case ATA_CMD_FPDMA_WRITE:
2936 case ATA_CMD_WRITE_MULTI:
2937 case ATA_CMD_WRITE_MULTI_EXT:
2938 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2939 case ATA_CMD_PIO_WRITE:
2940 case ATA_CMD_PIO_WRITE_EXT:
2941 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2942 case ATA_CMD_WRITE_STREAM_EXT:
2943 qc->sect_size = scmd->device->sector_size;
2944 break;
2945
2946 /* Everything else uses 512 byte "sectors" */
2947 default:
2948 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 2949 }
2950
2951 /*
2952 * Set flags so that all registers will be written, pass on
2953 * write indication (used for PIO/DMA setup), result TF is
2954 * copied back and we don't whine too much about its failure.
2955 */
bc496ed0 2956 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 2957 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2958 tf->flags |= ATA_TFLAG_WRITE;
2959
2960 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2961
2962 /*
2963 * Set transfer length.
2964 *
2965 * TODO: find out if we need to do more here to
2966 * cover scatter/gather case.
2967 */
2968 ata_qc_set_pc_nbytes(qc);
2969
2970 /* We may not issue DMA commands if no DMA mode is set */
2971 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2972 goto invalid_fld;
2973
1dce589c
AL		 2974 /* sanity check for pio multi commands */
2975 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2976 goto invalid_fld;
2977
2978 if (is_multi_taskfile(tf)) {
2979 unsigned int multi_count = 1 << (cdb[1] >> 5);
2980
2981 /* compare the passed through multi_count
2982 * with the cached multi_count of libata
2983 */
2984 if (multi_count != dev->multi_count)
a9a79dfe
JP		 2985 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
2986 multi_count);
d26fc955 2987 }
1dce589c 2988
b095518e
JG		 2989 /*
2990 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2991 * SET_FEATURES - XFER MODE must be preceded/succeeded
2992 * by an update to hardware-specific registers for each
2993 * controller (i.e. the reason for ->set_piomode(),
2994 * ->set_dmamode(), and ->post_set_mode() hooks).
2995 */
bd30add8
TH		 2996 if (tf->command == ATA_CMD_SET_FEATURES &&
2997 tf->feature == SETFEATURES_XFER)
9a405257 2998 goto invalid_fld;
b095518e
JG		 2999
3000 /*
bd30add8
TH		 3001 * Filter TPM commands by default. These provide an
3002 * essentially uncontrolled encrypted "back door" between
3003 * applications and the disk. Set libata.allow_tpm=1 if you
3004 * have a real reason for wanting to use them. This ensures
3005 * that installed software cannot easily mess stuff up without
3006 * user intent. DVR type users will probably ship with this enabled
3007 * for movie content management.
b095518e 3008 *
bd30add8
TH		 3009 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3010 * for this and should do in future but that it is not sufficient as
3011 * DCS is an optional feature set. Thus we also do the software filter
3012 * so that we comply with the TC consortium stated goal that the user
3013 * can turn off TC features of their system.
b095518e 3014 */
bd30add8
TH		 3015 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3016 goto invalid_fld;
e61e0672 3017
b095518e 3018 return 0;
9a405257
TH		 3019
3020 invalid_fld:
542b1444 3021 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 3022 /* "Invalid field in cdb" */
3023 return 1;
b095518e
JG		 3024}
3025
18f0f978
CH		 3026static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3027{
3028 struct ata_taskfile *tf = &qc->tf;
3029 struct scsi_cmnd *scmd = qc->scsicmd;
3030 struct ata_device *dev = qc->dev;
3031 const u8 *cdb = scmd->cmnd;
3032 u64 block;
3033 u32 n_block;
3034 u32 size;
3035 void *buf;
3036
3037 /* we may not issue DMA commands if no DMA mode is set */
3038 if (unlikely(!dev->dma_mode))
3039 goto invalid_fld;
3040
3041 if (unlikely(scmd->cmd_len < 16))
3042 goto invalid_fld;
3043 scsi_16_lba_len(cdb, &block, &n_block);
3044
3045 /* for now we only support WRITE SAME with the unmap bit set */
3046 if (unlikely(!(cdb[1] & 0x8)))
3047 goto invalid_fld;
3048
3049 /*
3050 * WRITE SAME always has a sector sized buffer as payload, this
3051 * should never be a multiple entry S/G list.
3052 */
3053 if (!scsi_sg_count(scmd))
3054 goto invalid_fld;
3055
3056 buf = page_address(sg_page(scsi_sglist(scmd)));
d0634c4a 3057 size = ata_set_lba_range_entries(buf, 512, block, n_block);
18f0f978
CH		 3058
3059 tf->protocol = ATA_PROT_DMA;
3060 tf->hob_feature = 0;
3061 tf->feature = ATA_DSM_TRIM;
3062 tf->hob_nsect = (size / 512) >> 8;
3063 tf->nsect = size / 512;
3064 tf->command = ATA_CMD_DSM;
3065 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3066 ATA_TFLAG_WRITE;
3067
3068 ata_qc_set_pc_nbytes(qc);
3069
3070 return 0;
3071
3072 invalid_fld:
3073 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3074 /* "Invalid field in cdb" */
3075 return 1;
3076}
3077
1da177e4
LT		 3078/**
3079 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3080 * @dev: ATA device
3081 * @cmd: SCSI command opcode to consider
3082 *
3083 * Look up the SCSI command given, and determine whether the
3084 * SCSI command is to be translated or simulated.
3085 *
3086 * RETURNS:
3087 * Pointer to translation function if possible, %NULL if not.
3088 */
3089
3090static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3091{
3092 switch (cmd) {
3093 case READ_6:
3094 case READ_10:
3095 case READ_16:
3096
3097 case WRITE_6:
3098 case WRITE_10:
3099 case WRITE_16:
3100 return ata_scsi_rw_xlat;
3101
0cdd6eb7 3102 case WRITE_SAME_16:
18f0f978
CH		 3103 return ata_scsi_write_same_xlat;
3104
1da177e4
LT		 3105 case SYNCHRONIZE_CACHE:
3106 if (ata_try_flush_cache(dev))
3107 return ata_scsi_flush_xlat;
3108 break;
3109
3110 case VERIFY:
3111 case VERIFY_16:
3112 return ata_scsi_verify_xlat;
b095518e
JG		 3113
3114 case ATA_12:
3115 case ATA_16:
3116 return ata_scsi_pass_thru;
da61396d 3117
972dcafb
DG		 3118 case START_STOP:
3119 return ata_scsi_start_stop_xlat;
1da177e4
LT		 3120 }
3121
3122 return NULL;
3123}
3124
3125/**
3126 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3127 * @ap: ATA port to which the command was being sent
3128 * @cmd: SCSI command to dump
3129 *
3130 * Prints the contents of a SCSI command via printk().
3131 */
3132
3133static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3134 struct scsi_cmnd *cmd)
3135{
3136#ifdef ATA_DEBUG
3137 struct scsi_device *scsidev = cmd->device;
3138 u8 *scsicmd = cmd->cmnd;
3139
3140 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 3141 ap->print_id,
1da177e4
LT		 3142 scsidev->channel, scsidev->id, scsidev->lun,
3143 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3144 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3145 scsicmd[8]);
3146#endif
3147}
3148
542b1444 3149static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 3150 struct ata_device *dev)
eb3f0f9c 3151{
baf4fdfa
ML		 3152 u8 scsi_op = scmd->cmnd[0];
3153 ata_xlat_func_t xlat_func;
2115ea94
TH		 3154 int rc = 0;
3155
eb3f0f9c 3156 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 3157 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3158 goto bad_cdb_len;
eb3f0f9c 3159
baf4fdfa
ML		 3160 xlat_func = ata_get_xlat_func(dev, scsi_op);
3161 } else {
3162 if (unlikely(!scmd->cmd_len))
3163 goto bad_cdb_len;
3164
3165 xlat_func = NULL;
3166 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3167 /* relay SCSI command to ATAPI device */
607126c2
ML		 3168 int len = COMMAND_SIZE(scsi_op);
3169 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3170 goto bad_cdb_len;
3171
3172 xlat_func = atapi_xlat;
3173 } else {
3174 /* ATA_16 passthru, treat as an ATA command */
3175 if (unlikely(scmd->cmd_len > 16))
3176 goto bad_cdb_len;
3177
3178 xlat_func = ata_get_xlat_func(dev, scsi_op);
3179 }
3180 }
3181
3182 if (xlat_func)
b27dcfb0 3183 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 3184 else
b27dcfb0 3185 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 3186
3187 return rc;
baf4fdfa
ML		 3188
3189 bad_cdb_len:
3190 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3191 scmd->cmd_len, scsi_op, dev->cdb_len);
3192 scmd->result = DID_ERROR << 16;
b27dcfb0 3193 scmd->scsi_done(scmd);
baf4fdfa 3194 return 0;
eb3f0f9c
BK		 3195}
3196
1da177e4
LT		 3197/**
3198 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 3199 * @shost: SCSI host of command to be sent
1da177e4 3200 * @cmd: SCSI command to be sent
1da177e4
LT		 3201 *
3202 * In some cases, this function translates SCSI commands into
3203 * ATA taskfiles, and queues the taskfiles to be sent to
3204 * hardware. In other cases, this function simulates a
3205 * SCSI device by evaluating and responding to certain
3206 * SCSI commands. This creates the overall effect of
3207 * ATA and ATAPI devices appearing as SCSI devices.
3208 *
3209 * LOCKING:
23e701e6 3210 * ATA host lock
1da177e4
LT		 3211 *
3212 * RETURNS:
2115ea94
TH		 3213 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3214 * 0 otherwise.
1da177e4 3215 */
23e701e6 3216int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 3217{
3218 struct ata_port *ap;
3219 struct ata_device *dev;
3220 struct scsi_device *scsidev = cmd->device;
2115ea94 3221 int rc = 0;
23e701e6 3222 unsigned long irq_flags;
1da177e4 3223
35bb94b1 3224 ap = ata_shost_to_port(shost);
005a5a06 3225
23e701e6 3226 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 3227
3228 ata_scsi_dump_cdb(ap, cmd);
3229
3230 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3231 if (likely(dev))
b27dcfb0 3232 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 3233 else {
1da177e4 3234 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 3235 cmd->scsi_done(cmd);
1da177e4
LT		 3236 }
3237
23e701e6
JG		 3238 spin_unlock_irqrestore(ap->lock, irq_flags);
3239
2115ea94 3240 return rc;
1da177e4
LT		 3241}
3242
3243/**
3244 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3245 * @dev: the target device
1da177e4 3246 * @cmd: SCSI command being sent to device.
1da177e4
LT		 3247 *
3248 * Interprets and directly executes a select list of SCSI commands
3249 * that can be handled internally.
3250 *
3251 * LOCKING:
cca3974e 3252 * spin_lock_irqsave(host lock)
1da177e4
LT		 3253 */
3254
b27dcfb0 3255void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 3256{
3257 struct ata_scsi_args args;
057ace5e 3258 const u8 *scsicmd = cmd->cmnd;
45394145 3259 u8 tmp8;
1da177e4 3260
9a3dccc4
TH		 3261 args.dev = dev;
3262 args.id = dev->id;
1da177e4 3263 args.cmd = cmd;
b27dcfb0 3264 args.done = cmd->scsi_done;
1da177e4
LT		 3265
3266 switch(scsicmd[0]) {
2dcb407e
JG		 3267 /* TODO: worth improving? */
3268 case FORMAT_UNIT:
b27dcfb0 3269 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3270 break;
3271
3272 case INQUIRY:
3273 if (scsicmd[1] & 2) /* is CmdDt set? */
b27dcfb0 3274 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3275 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3276 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3277 else switch (scsicmd[2]) {
3278 case 0x00:
3279 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3280 break;
2dcb407e
JG		 3281 case 0x80:
3282 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3283 break;
2dcb407e
JG		 3284 case 0x83:
3285 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3286 break;
2dcb407e
JG		 3287 case 0x89:
3288 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3289 break;
18f0f978
CH		 3290 case 0xb0:
3291 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3292 break;
1e9dbc92
MW		 3293 case 0xb1:
3294 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3295 break;
02e0a604
MP		 3296 case 0xb2:
3297 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3298 break;
2dcb407e 3299 default:
b27dcfb0 3300 ata_scsi_invalid_field(cmd);
1da177e4 3301 break;
2dcb407e
JG		 3302 }
3303 break;
3304
3305 case MODE_SENSE:
3306 case MODE_SENSE_10:
3307 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3308 break;
3309
3310 case MODE_SELECT: /* unconditionally return */
3311 case MODE_SELECT_10: /* bad-field-in-cdb */
b27dcfb0 3312 ata_scsi_invalid_field(cmd);
2dcb407e 3313 break;
1da177e4 3314
2dcb407e
JG		 3315 case READ_CAPACITY:
3316 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3317 break;
3318
3319 case SERVICE_ACTION_IN:
3320 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3321 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 3322 else
b27dcfb0 3323 ata_scsi_invalid_field(cmd);
2dcb407e 3324 break;
1da177e4 3325
2dcb407e
JG		 3326 case REPORT_LUNS:
3327 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3328 break;
1da177e4 3329
2dcb407e
JG		 3330 case REQUEST_SENSE:
3331 ata_scsi_set_sense(cmd, 0, 0, 0);
3332 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 3333 cmd->scsi_done(cmd);
2dcb407e 3334 break;
1da177e4 3335
2dcb407e
JG		 3336 /* if we reach this, then writeback caching is disabled,
3337 * turning this into a no-op.
3338 */
3339 case SYNCHRONIZE_CACHE:
3340 /* fall through */
3341
3342 /* no-op's, complete with success */
3343 case REZERO_UNIT:
3344 case SEEK_6:
3345 case SEEK_10:
3346 case TEST_UNIT_READY:
3347 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3348 break;
45394145 3349
2dcb407e
JG		 3350 case SEND_DIAGNOSTIC:
3351 tmp8 = scsicmd[1] & ~(1 << 3);
3352 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3353 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 3354 else
b27dcfb0 3355 ata_scsi_invalid_field(cmd);
2dcb407e 3356 break;
1da177e4 3357
2dcb407e
JG		 3358 /* all other commands */
3359 default:
3360 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3361 /* "Invalid command operation code" */
b27dcfb0 3362 cmd->scsi_done(cmd);
2dcb407e 3363 break;
1da177e4
LT		 3364 }
3365}
3366
f3187195
TH		 3367int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3368{
3369 int i, rc;
3370
3371 for (i = 0; i < host->n_ports; i++) {
3372 struct ata_port *ap = host->ports[i];
3373 struct Scsi_Host *shost;
3374
3375 rc = -ENOMEM;
3376 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3377 if (!shost)
3378 goto err_alloc;
3379
3380 *(struct ata_port **)&shost->hostdata[0] = ap;
3381 ap->scsi_host = shost;
3382
d9027470 3383 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 3384 shost->unique_id = ap->print_id;
3385 shost->max_id = 16;
3386 shost->max_lun = 1;
3387 shost->max_channel = 1;
3388 shost->max_cmd_len = 16;
3389
31cc23b3
TH		 3390 /* Schedule policy is determined by ->qc_defer()
3391 * callback and it needs to see every deferred qc.
3392 * Set host_blocked to 1 to prevent SCSI midlayer from
3393 * automatically deferring requests.
3394 */
3395 shost->max_host_blocked = 1;
3396
f3187195
TH		 3397 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3398 if (rc)
3399 goto err_add;
3400 }
3401
3402 return 0;
3403
3404 err_add:
3405 scsi_host_put(host->ports[i]->scsi_host);
3406 err_alloc:
3407 while (--i >= 0) {
3408 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3409
3410 scsi_remove_host(shost);
3411 scsi_host_put(shost);
3412 }
3413 return rc;
3414}
3415
1ae46317 3416void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3417{
1ae46317
TH		 3418 int tries = 5;
3419 struct ata_device *last_failed_dev = NULL;
41bda9c9 3420 struct ata_link *link;
1ae46317 3421 struct ata_device *dev;
644dd0cc 3422
1ae46317 3423 repeat:
1eca4365
TH		 3424 ata_for_each_link(link, ap, EDGE) {
3425 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3426 struct scsi_device *sdev;
3427 int channel = 0, id = 0;
3edebac4 3428
1eca4365 3429 if (dev->sdev)
41bda9c9 3430 continue;
3f19ee8c 3431
41bda9c9
TH		 3432 if (ata_is_host_link(link))
3433 id = dev->devno;
3434 else
3435 channel = link->pmp;
3436
3437 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3438 NULL);
3439 if (!IS_ERR(sdev)) {
3440 dev->sdev = sdev;
3441 scsi_device_put(sdev);
295124dc
GG		 3442 } else {
3443 dev->sdev = NULL;
41bda9c9 3444 }
3edebac4 3445 }
3f19ee8c 3446 }
1ae46317
TH		 3447
3448 /* If we scanned while EH was in progress or allocation
3449 * failure occurred, scan would have failed silently. Check
3450 * whether all devices are attached.
3451 */
1eca4365
TH		 3452 ata_for_each_link(link, ap, EDGE) {
3453 ata_for_each_dev(dev, link, ENABLED) {
3454 if (!dev->sdev)
41bda9c9
TH		 3455 goto exit_loop;
3456 }
1ae46317 3457 }
41bda9c9
TH		 3458 exit_loop:
3459 if (!link)
1ae46317
TH		 3460 return;
3461
3462 /* we're missing some SCSI devices */
3463 if (sync) {
3464 /* If caller requested synchrnous scan && we've made
3465 * any progress, sleep briefly and repeat.
3466 */
3467 if (dev != last_failed_dev) {
3468 msleep(100);
3469 last_failed_dev = dev;
3470 goto repeat;
3471 }
3472
3473 /* We might be failing to detect boot device, give it
3474 * a few more chances.
3475 */
3476 if (--tries) {
3477 msleep(100);
3478 goto repeat;
3479 }
3480
a9a79dfe
JP		 3481 ata_port_err(ap,
3482 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 3483 }
3484
ad72cf98 3485 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 3486 round_jiffies_relative(HZ));
644dd0cc 3487}
0ea035a3
TH		 3488
3489/**
3490 * ata_scsi_offline_dev - offline attached SCSI device
3491 * @dev: ATA device to offline attached SCSI device for
3492 *
3493 * This function is called from ata_eh_hotplug() and responsible
3494 * for taking the SCSI device attached to @dev offline. This
cca3974e 3495 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3496 * against clearing.
3497 *
3498 * LOCKING:
cca3974e 3499 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3500 *
3501 * RETURNS:
3502 * 1 if attached SCSI device exists, 0 otherwise.
3503 */
3504int ata_scsi_offline_dev(struct ata_device *dev)
3505{
3506 if (dev->sdev) {
3507 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3508 return 1;
3509 }
3510 return 0;
3511}
580b2102
TH		 3512
3513/**
3514 * ata_scsi_remove_dev - remove attached SCSI device
3515 * @dev: ATA device to remove attached SCSI device for
3516 *
3517 * This function is called from ata_eh_scsi_hotplug() and
3518 * responsible for removing the SCSI device attached to @dev.
3519 *
3520 * LOCKING:
3521 * Kernel thread context (may sleep).
3522 */
3523static void ata_scsi_remove_dev(struct ata_device *dev)
3524{
9af5c9c9 3525 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3526 struct scsi_device *sdev;
3527 unsigned long flags;
3528
3529 /* Alas, we need to grab scan_mutex to ensure SCSI device
3530 * state doesn't change underneath us and thus
3531 * scsi_device_get() always succeeds. The mutex locking can
3532 * be removed if there is __scsi_device_get() interface which
3533 * increments reference counts regardless of device state.
3534 */
cca3974e 3535 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3536 spin_lock_irqsave(ap->lock, flags);
580b2102 3537
cca3974e 3538 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3539 sdev = dev->sdev;
3540 dev->sdev = NULL;
3541
3542 if (sdev) {
3543 /* If user initiated unplug races with us, sdev can go
cca3974e 3544 * away underneath us after the host lock and
580b2102
TH		 3545 * scan_mutex are released. Hold onto it.
3546 */
3547 if (scsi_device_get(sdev) == 0) {
3548 /* The following ensures the attached sdev is
3549 * offline on return from ata_scsi_offline_dev()
3550 * regardless it wins or loses the race
3551 * against this function.
3552 */
3553 scsi_device_set_state(sdev, SDEV_OFFLINE);
3554 } else {
3555 WARN_ON(1);
3556 sdev = NULL;
3557 }
3558 }
3559
ba6a1308 3560 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3561 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3562
3563 if (sdev) {
a9a79dfe
JP		 3564 ata_dev_info(dev, "detaching (SCSI %s)\n",
3565 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3566
3567 scsi_remove_device(sdev);
3568 scsi_device_put(sdev);
3569 }
3570}
3571
41bda9c9
TH		 3572static void ata_scsi_handle_link_detach(struct ata_link *link)
3573{
3574 struct ata_port *ap = link->ap;
3575 struct ata_device *dev;
3576
1eca4365 3577 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3578 unsigned long flags;
3579
3580 if (!(dev->flags & ATA_DFLAG_DETACHED))
3581 continue;
3582
3583 spin_lock_irqsave(ap->lock, flags);
3584 dev->flags &= ~ATA_DFLAG_DETACHED;
3585 spin_unlock_irqrestore(ap->lock, flags);
3586
3587 ata_scsi_remove_dev(dev);
3588 }
3589}
3590
2f294968
KCA		 3591/**
3592 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3593 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3594 *
3595 * Tell the block layer to send a media change notification
3596 * event.
3597 *
3598 * LOCKING:
854c73a2 3599 * spin_lock_irqsave(host lock)
2f294968 3600 */
854c73a2 3601void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3602{
854c73a2 3603 if (dev->sdev)
f26792d5
JG		 3604 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3605 GFP_ATOMIC);
2f294968 3606}
2f294968 3607
580b2102
TH		 3608/**
3609 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3610 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3611 *
3612 * Perform SCSI part of hotplug. It's executed from a separate
3613 * workqueue after EH completes. This is necessary because SCSI
3614 * hot plugging requires working EH and hot unplugging is
3615 * synchronized with hot plugging with a mutex.
3616 *
3617 * LOCKING:
3618 * Kernel thread context (may sleep).
3619 */
65f27f38 3620void ata_scsi_hotplug(struct work_struct *work)
580b2102 3621{
65f27f38
DH		 3622 struct ata_port *ap =
3623 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3624 int i;
580b2102 3625
b51e9e5d 3626 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3627 DPRINTK("ENTER/EXIT - unloading\n");
3628 return;
3629 }
3630
3631 DPRINTK("ENTER\n");
ad72cf98 3632 mutex_lock(&ap->scsi_scan_mutex);
580b2102 3633
41bda9c9
TH		 3634 /* Unplug detached devices. We cannot use link iterator here
3635 * because PMP links have to be scanned even if PMP is
3636 * currently not attached. Iterate manually.
3637 */
3638 ata_scsi_handle_link_detach(&ap->link);
3639 if (ap->pmp_link)
3640 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3641 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3642
3643 /* scan for new ones */
1ae46317 3644 ata_scsi_scan_host(ap, 0);
580b2102 3645
ad72cf98 3646 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 3647 DPRINTK("EXIT\n");
3648}
83c47bcb
TH		 3649
3650/**
3651 * ata_scsi_user_scan - indication for user-initiated bus scan
3652 * @shost: SCSI host to scan
3653 * @channel: Channel to scan
3654 * @id: ID to scan
3655 * @lun: LUN to scan
3656 *
3657 * This function is called when user explicitly requests bus
3658 * scan. Set probe pending flag and invoke EH.
3659 *
3660 * LOCKING:
3661 * SCSI layer (we don't care)
3662 *
3663 * RETURNS:
3664 * Zero.
3665 */
d9027470
GG		 3666int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3667 unsigned int id, unsigned int lun)
83c47bcb
TH		 3668{
3669 struct ata_port *ap = ata_shost_to_port(shost);
3670 unsigned long flags;
41bda9c9 3671 int devno, rc = 0;
83c47bcb
TH		 3672
3673 if (!ap->ops->error_handler)
3674 return -EOPNOTSUPP;
3675
41bda9c9 3676 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3677 return -EINVAL;
3678
071f44b1 3679 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3680 if (channel != SCAN_WILD_CARD && channel)
3681 return -EINVAL;
3682 devno = id;
3683 } else {
3684 if (id != SCAN_WILD_CARD && id)
3685 return -EINVAL;
3686 devno = channel;
3687 }
3688
ba6a1308 3689 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3690
41bda9c9
TH		 3691 if (devno == SCAN_WILD_CARD) {
3692 struct ata_link *link;
3693
1eca4365 3694 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3695 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3696 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3697 ehi->action |= ATA_EH_RESET;
41bda9c9 3698 }
83c47bcb 3699 } else {
41bda9c9 3700 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3701
3702 if (dev) {
41bda9c9 3703 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3704 ehi->probe_mask |= 1 << dev->devno;
cf480626 3705 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3706 } else
3707 rc = -EINVAL;
3708 }
3709
309afcb5 3710 if (rc == 0) {
83c47bcb 3711 ata_port_schedule_eh(ap);
309afcb5
TH		 3712 spin_unlock_irqrestore(ap->lock, flags);
3713 ata_port_wait_eh(ap);
3714 } else
3715 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3716
3717 return rc;
3718}
3057ac3c 3719
3720/**
d0171269 3721 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3722 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3723 *
d0171269 3724 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 3725 * libata need to propagate the changes to SCSI layer.
3057ac3c 3726 *
d0171269
TH		 3727 * LOCKING:
3728 * Kernel thread context (may sleep).
3057ac3c 3729 */
65f27f38 3730void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3731{
65f27f38
DH		 3732 struct ata_port *ap =
3733 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3734 struct ata_link *link;
f58229f8 3735 struct ata_device *dev;
f84e7e41 3736 unsigned long flags;
3057ac3c 3737
ad72cf98 3738 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 3739 spin_lock_irqsave(ap->lock, flags);
3740
1eca4365
TH		 3741 ata_for_each_link(link, ap, EDGE) {
3742 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3743 struct scsi_device *sdev = dev->sdev;
3057ac3c 3744
1eca4365 3745 if (!sdev)
41bda9c9
TH		 3746 continue;
3747 if (scsi_device_get(sdev))
3748 continue;
f84e7e41 3749
41bda9c9
TH		 3750 spin_unlock_irqrestore(ap->lock, flags);
3751 scsi_rescan_device(&(sdev->sdev_gendev));
3752 scsi_device_put(sdev);
3753 spin_lock_irqsave(ap->lock, flags);
3754 }
3057ac3c 3755 }
f84e7e41
TH		 3756
3757 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 3758 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 3759}
80289167
BK		 3760
3761/**
3762 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3763 * @host: ATA host container for all SAS ports
80289167 3764 * @port_info: Information from low-level host driver
cca3974e 3765 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3766 *
3767 * LOCKING:
3768 * PCI/etc. bus probe sem.
3769 *
3770 * RETURNS:
3771 * ata_port pointer on success / NULL on failure.
3772 */
3773
cca3974e 3774struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3775 struct ata_port_info *port_info,
cca3974e 3776 struct Scsi_Host *shost)
80289167 3777{
f3187195 3778 struct ata_port *ap;
80289167 3779
f3187195 3780 ap = ata_port_alloc(host);
80289167
BK		 3781 if (!ap)
3782 return NULL;
3783
f3187195 3784 ap->port_no = 0;
a29b5dad 3785 ap->lock = &host->lock;
f3187195
TH		 3786 ap->pio_mask = port_info->pio_mask;
3787 ap->mwdma_mask = port_info->mwdma_mask;
3788 ap->udma_mask = port_info->udma_mask;
3789 ap->flags |= port_info->flags;
3790 ap->ops = port_info->port_ops;
3791 ap->cbl = ATA_CBL_SATA;
3792
80289167
BK		 3793 return ap;
3794}
3795EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3796
3797/**
3798 * ata_sas_port_start - Set port up for dma.
3799 * @ap: Port to initialize
3800 *
3801 * Called just after data structures for each port are
dde20207 3802 * initialized.
80289167
BK		 3803 *
3804 * May be used as the port_start() entry in ata_port_operations.
3805 *
3806 * LOCKING:
3807 * Inherited from caller.
3808 */
3809int ata_sas_port_start(struct ata_port *ap)
3810{
3f1e046a
NA		 3811 /*
3812 * the port is marked as frozen at allocation time, but if we don't
3813 * have new eh, we won't thaw it
3814 */
3815 if (!ap->ops->error_handler)
3816 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 3817 return 0;
80289167
BK		 3818}
3819EXPORT_SYMBOL_GPL(ata_sas_port_start);
3820
3821/**
3822 * ata_port_stop - Undo ata_sas_port_start()
3823 * @ap: Port to shut down
3824 *
80289167
BK		 3825 * May be used as the port_stop() entry in ata_port_operations.
3826 *
3827 * LOCKING:
3828 * Inherited from caller.
3829 */
3830
3831void ata_sas_port_stop(struct ata_port *ap)
3832{
80289167
BK		 3833}
3834EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3835
3836/**
3837 * ata_sas_port_init - Initialize a SATA device
3838 * @ap: SATA port to initialize
3839 *
3840 * LOCKING:
3841 * PCI/etc. bus probe sem.
3842 *
3843 * RETURNS:
3844 * Zero on success, non-zero on error.
3845 */
3846
3847int ata_sas_port_init(struct ata_port *ap)
3848{
3849 int rc = ap->ops->port_start(ap);
3850
f3187195
TH		 3851 if (!rc) {
3852 ap->print_id = ata_print_id++;
238c9cf9 3853 rc = ata_port_probe(ap);
f3187195 3854 }
80289167
BK		 3855
3856 return rc;
3857}
3858EXPORT_SYMBOL_GPL(ata_sas_port_init);
3859
3860/**
3861 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3862 * @ap: SATA port to destroy
3863 *
3864 */
3865
3866void ata_sas_port_destroy(struct ata_port *ap)
3867{
f0d36efd
TH		 3868 if (ap->ops->port_stop)
3869 ap->ops->port_stop(ap);
80289167
BK		 3870 kfree(ap);
3871}
3872EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3873
3874/**
3875 * ata_sas_slave_configure - Default slave_config routine for libata devices
3876 * @sdev: SCSI device to configure
3877 * @ap: ATA port to which SCSI device is attached
3878 *
3879 * RETURNS:
3880 * Zero.
3881 */
3882
3883int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3884{
3885 ata_scsi_sdev_config(sdev);
9af5c9c9 3886 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3887 return 0;
3888}
3889EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3890
3891/**
3892 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3893 * @cmd: SCSI command to be sent
80289167
BK		 3894 * @ap: ATA port to which the command is being sent
3895 *
3896 * RETURNS:
08475a19
BK		 3897 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3898 * 0 otherwise.
80289167
BK		 3899 */
3900
b27dcfb0 3901int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 3902{
08475a19
BK		 3903 int rc = 0;
3904
80289167
BK		 3905 ata_scsi_dump_cdb(ap, cmd);
3906
2486fa56 3907 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 3908 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 3909 else {
3910 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 3911 cmd->scsi_done(cmd);
80289167 3912 }
08475a19 3913 return rc;
80289167
BK		 3914}
3915EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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