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[SCSI] sd: Permit merged discard requests
[linux-2.6-block.git] / drivers / ata / libata-scsi.c
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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;
3c6bdaea 1055 sdev->no_report_opcodes = 1;
31cc23b3
TH		 1056
1057 /* Schedule policy is determined by ->qc_defer() callback and
1058 * it needs to see every deferred qc. Set dev_blocked to 1 to
1059 * prevent SCSI midlayer from automatically deferring
1060 * requests.
1061 */
1062 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1063}
1064
fa2fc7f4
JB		 1065/**
1066 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1067 * @rq: request to be checked
fa2fc7f4
JB		 1068 *
1069 * ATAPI commands which transfer variable length data to host
1070 * might overflow due to application error or hardare bug. This
1071 * function checks whether overflow should be drained and ignored
1072 * for @request.
1073 *
1074 * LOCKING:
1075 * None.
1076 *
1077 * RETURNS:
1078 * 1 if ; otherwise, 0.
1079 */
1080static int atapi_drain_needed(struct request *rq)
1081{
33659ebb 1082 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1083 return 0;
1084
7b6d91da 1085 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
fa2fc7f4
JB		 1086 return 0;
1087
1088 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1089}
1090
1091static int ata_scsi_dev_config(struct scsi_device *sdev,
1092 struct ata_device *dev)
a6cce2a7 1093{
900e599e 1094 struct request_queue *q = sdev->request_queue;
1095
45fabbb7
EO		 1096 if (!ata_id_has_unload(dev->id))
1097 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1098
914ed354 1099 /* configure max sectors */
900e599e 1100 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1101
fa2fc7f4 1102 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1103 void *buf;
1104
729a6a30
TH		 1105 sdev->sector_size = ATA_SECT_SIZE;
1106
1107 /* set DMA padding */
900e599e 1108 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1109
1110 /* configure draining */
1111 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1112 if (!buf) {
a9a79dfe 1113 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1114 return -ENOMEM;
1115 }
1116
1117 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1118 } else {
295124dc 1119 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1120 sdev->manage_start_stop = 1;
dde20207 1121 }
d8cf5389 1122
729a6a30
TH		 1123 /*
1124 * ata_pio_sectors() expects buffer for each sector to not cross
1125 * page boundary. Enforce it by requiring buffers to be sector
1126 * aligned, which works iff sector_size is not larger than
1127 * PAGE_SIZE. ATAPI devices also need the alignment as
1128 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1129 */
1130 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1131 ata_dev_warn(dev,
729a6a30
TH		 1132 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1133 sdev->sector_size);
1134
900e599e 1135 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1136
f26792d5
JG		 1137 if (dev->flags & ATA_DFLAG_AN)
1138 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1139
a6e6ce8e
TH		 1140 if (dev->flags & ATA_DFLAG_NCQ) {
1141 int depth;
1142
1143 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1144 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1145 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1146 }
fa2fc7f4 1147
900e599e 1148 blk_queue_flush_queueable(q, false);
1149
295124dc 1150 dev->sdev = sdev;
fa2fc7f4 1151 return 0;
a6cce2a7
BK		 1152}
1153
1da177e4
LT		 1154/**
1155 * ata_scsi_slave_config - Set SCSI device attributes
1156 * @sdev: SCSI device to examine
1157 *
1158 * This is called before we actually start reading
1159 * and writing to the device, to configure certain
1160 * SCSI mid-layer behaviors.
1161 *
1162 * LOCKING:
1163 * Defined by SCSI layer. We don't really care.
1164 */
1165
1166int ata_scsi_slave_config(struct scsi_device *sdev)
1167{
31534363
TH		 1168 struct ata_port *ap = ata_shost_to_port(sdev->host);
1169 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1170 int rc = 0;
31534363 1171
a6cce2a7 1172 ata_scsi_sdev_config(sdev);
1da177e4 1173
31534363 1174 if (dev)
fa2fc7f4 1175 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1176
fa2fc7f4 1177 return rc;
1da177e4
LT		 1178}
1179
83c47bcb
TH		 1180/**
1181 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1182 * @sdev: SCSI device to be destroyed
1183 *
1184 * @sdev is about to be destroyed for hot/warm unplugging. If
1185 * this unplugging was initiated by libata as indicated by NULL
1186 * dev->sdev, this function doesn't have to do anything.
1187 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1188 * Clear dev->sdev, schedule the device for ATA detach and invoke
1189 * EH.
1190 *
1191 * LOCKING:
1192 * Defined by SCSI layer. We don't really care.
1193 */
1194void ata_scsi_slave_destroy(struct scsi_device *sdev)
1195{
1196 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1197 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1198 unsigned long flags;
1199 struct ata_device *dev;
1200
1201 if (!ap->ops->error_handler)
1202 return;
1203
ba6a1308 1204 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1205 dev = __ata_scsi_find_dev(ap, sdev);
1206 if (dev && dev->sdev) {
1207 /* SCSI device already in CANCEL state, no need to offline it */
1208 dev->sdev = NULL;
1209 dev->flags |= ATA_DFLAG_DETACH;
1210 ata_port_schedule_eh(ap);
1211 }
ba6a1308 1212 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1213
1214 kfree(q->dma_drain_buffer);
1215 q->dma_drain_buffer = NULL;
1216 q->dma_drain_size = 0;
83c47bcb
TH		 1217}
1218
a6e6ce8e 1219/**
f6e67035 1220 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
6d2dd054
MPS		 1221 * @ap: ATA port to which the device change the queue depth
1222 * @sdev: SCSI device to configure queue depth for
1223 * @queue_depth: new queue depth
1224 * @reason: calling context
a6e6ce8e 1225 *
f6e67035
DW		 1226 * libsas and libata have different approaches for associating a sdev to
1227 * its ata_port.
a6e6ce8e 1228 *
a6e6ce8e 1229 */
f6e67035
DW		 1230int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1231 int queue_depth, int reason)
a6e6ce8e 1232{
a6e6ce8e 1233 struct ata_device *dev;
360f654e 1234 unsigned long flags;
a6e6ce8e 1235
e881a172
MC		 1236 if (reason != SCSI_QDEPTH_DEFAULT)
1237 return -EOPNOTSUPP;
1238
c3c70c44 1239 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1240 return sdev->queue_depth;
1241
1242 dev = ata_scsi_find_dev(ap, sdev);
1243 if (!dev || !ata_dev_enabled(dev))
1244 return sdev->queue_depth;
1245
c3c70c44 1246 /* NCQ enabled? */
360f654e 1247 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1248 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1249 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1250 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1251 queue_depth = 1;
1252 }
360f654e
TH		 1253 spin_unlock_irqrestore(ap->lock, flags);
1254
c3c70c44
TH		 1255 /* limit and apply queue depth */
1256 queue_depth = min(queue_depth, sdev->host->can_queue);
1257 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1258 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1259
1260 if (sdev->queue_depth == queue_depth)
1261 return -EINVAL;
1262
1263 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1264 return queue_depth;
1265}
1266
f6e67035
DW		 1267/**
1268 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1269 * @sdev: SCSI device to configure queue depth for
1270 * @queue_depth: new queue depth
1271 * @reason: calling context
1272 *
1273 * This is libata standard hostt->change_queue_depth callback.
1274 * SCSI will call into this callback when user tries to set queue
1275 * depth via sysfs.
1276 *
1277 * LOCKING:
1278 * SCSI layer (we don't care)
1279 *
1280 * RETURNS:
1281 * Newly configured queue depth.
1282 */
1283int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1284 int reason)
1285{
1286 struct ata_port *ap = ata_shost_to_port(sdev->host);
1287
1288 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1289}
1290
972dcafb
DG		 1291/**
1292 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1293 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1294 *
1295 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1296 * (to start). Perhaps these commands should be preceded by
1297 * CHECK POWER MODE to see what power mode the device is already in.
1298 * [See SAT revision 5 at www.t10.org]
1299 *
1300 * LOCKING:
cca3974e 1301 * spin_lock_irqsave(host lock)
972dcafb
DG		 1302 *
1303 * RETURNS:
1304 * Zero on success, non-zero on error.
1305 */
ad706991 1306static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1307{
542b1444 1308 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1309 struct ata_taskfile *tf = &qc->tf;
ad706991 1310 const u8 *cdb = scmd->cmnd;
972dcafb 1311
2e5704f6
TH		 1312 if (scmd->cmd_len < 5)
1313 goto invalid_fld;
1314
972dcafb
DG		 1315 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1316 tf->protocol = ATA_PROT_NODATA;
542b1444 1317 if (cdb[1] & 0x1) {
972dcafb
DG		 1318 ; /* ignore IMMED bit, violates sat-r05 */
1319 }
542b1444 1320 if (cdb[4] & 0x2)
ae006510 1321 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1322 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1323 goto invalid_fld; /* power conditions not supported */
e31e8531 1324
542b1444 1325 if (cdb[4] & 0x1) {
972dcafb 1326 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1327
1328 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1329 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1330
1331 tf->lbah = 0x0;
1332 tf->lbam = 0x0;
1333 tf->lbal = 0x0;
1334 tf->device |= ATA_LBA;
1335 } else {
1336 /* CHS */
1337 tf->lbal = 0x1; /* sect */
1338 tf->lbam = 0x0; /* cyl low */
1339 tf->lbah = 0x0; /* cyl high */
1340 }
1341
972dcafb 1342 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1343 } else {
2a6e58d2
RW		 1344 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1345 * or S5) causing some drives to spin up and down again.
1346 */
1347 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1348 system_state == SYSTEM_POWER_OFF)
1349 goto skip;
1350
1351 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1352 system_entering_hibernation())
1353 goto skip;
1354
78981a7c
RH		 1355 /* Issue ATA STANDBY IMMEDIATE command */
1356 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1357 }
78981a7c 1358
972dcafb
DG		 1359 /*
1360 * Standby and Idle condition timers could be implemented but that
1361 * would require libata to implement the Power condition mode page
1362 * and allow the user to change it. Changing mode pages requires
1363 * MODE SELECT to be implemented.
1364 */
1365
1366 return 0;
ae006510 1367
2a6e58d2 1368 invalid_fld:
542b1444 1369 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1370 /* "Invalid field in cbd" */
1371 return 1;
2a6e58d2
RW		 1372 skip:
1373 scmd->result = SAM_STAT_GOOD;
1374 return 1;
972dcafb
DG		 1375}
1376
1377
1da177e4
LT		 1378/**
1379 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1380 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1381 *
1382 * Sets up an ATA taskfile to issue FLUSH CACHE or
1383 * FLUSH CACHE EXT.
1384 *
1385 * LOCKING:
cca3974e 1386 * spin_lock_irqsave(host lock)
1da177e4
LT		 1387 *
1388 * RETURNS:
1389 * Zero on success, non-zero on error.
1390 */
ad706991 1391static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1392{
1393 struct ata_taskfile *tf = &qc->tf;
1394
1395 tf->flags |= ATA_TFLAG_DEVICE;
1396 tf->protocol = ATA_PROT_NODATA;
1397
6fc49adb 1398 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1399 tf->command = ATA_CMD_FLUSH_EXT;
1400 else
1401 tf->command = ATA_CMD_FLUSH;
1402
b666da35
TH		 1403 /* flush is critical for IO integrity, consider it an IO command */
1404 qc->flags |= ATA_QCFLAG_IO;
1405
1da177e4
LT		 1406 return 0;
1407}
1408
3aef5231
AL		 1409/**
1410 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1411 * @cdb: SCSI command to translate
3aef5231
AL		 1412 *
1413 * Calculate LBA and transfer length for 6-byte commands.
1414 *
1415 * RETURNS:
1416 * @plba: the LBA
1417 * @plen: the transfer length
1418 */
542b1444 1419static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1420{
1421 u64 lba = 0;
6c7b7d2b 1422 u32 len;
3aef5231
AL		 1423
1424 VPRINTK("six-byte command\n");
1425
6c7b7d2b 1426 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1427 lba |= ((u64)cdb[2]) << 8;
1428 lba |= ((u64)cdb[3]);
3aef5231 1429
6c7b7d2b 1430 len = cdb[4];
3aef5231
AL		 1431
1432 *plba = lba;
1433 *plen = len;
1434}
1435
1436/**
1437 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1438 * @cdb: SCSI command to translate
3aef5231
AL		 1439 *
1440 * Calculate LBA and transfer length for 10-byte commands.
1441 *
1442 * RETURNS:
1443 * @plba: the LBA
1444 * @plen: the transfer length
1445 */
542b1444 1446static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1447{
1448 u64 lba = 0;
1449 u32 len = 0;
1450
1451 VPRINTK("ten-byte command\n");
1452
542b1444
TH		 1453 lba |= ((u64)cdb[2]) << 24;
1454 lba |= ((u64)cdb[3]) << 16;
1455 lba |= ((u64)cdb[4]) << 8;
1456 lba |= ((u64)cdb[5]);
3aef5231 1457
542b1444
TH		 1458 len |= ((u32)cdb[7]) << 8;
1459 len |= ((u32)cdb[8]);
3aef5231
AL		 1460
1461 *plba = lba;
1462 *plen = len;
1463}
1464
1465/**
1466 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1467 * @cdb: SCSI command to translate
3aef5231
AL		 1468 *
1469 * Calculate LBA and transfer length for 16-byte commands.
1470 *
1471 * RETURNS:
1472 * @plba: the LBA
1473 * @plen: the transfer length
1474 */
542b1444 1475static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1476{
1477 u64 lba = 0;
1478 u32 len = 0;
1479
1480 VPRINTK("sixteen-byte command\n");
1481
542b1444
TH		 1482 lba |= ((u64)cdb[2]) << 56;
1483 lba |= ((u64)cdb[3]) << 48;
1484 lba |= ((u64)cdb[4]) << 40;
1485 lba |= ((u64)cdb[5]) << 32;
1486 lba |= ((u64)cdb[6]) << 24;
1487 lba |= ((u64)cdb[7]) << 16;
1488 lba |= ((u64)cdb[8]) << 8;
1489 lba |= ((u64)cdb[9]);
3aef5231 1490
542b1444
TH		 1491 len |= ((u32)cdb[10]) << 24;
1492 len |= ((u32)cdb[11]) << 16;
1493 len |= ((u32)cdb[12]) << 8;
1494 len |= ((u32)cdb[13]);
3aef5231
AL		 1495
1496 *plba = lba;
1497 *plen = len;
1498}
1499
1da177e4
LT		 1500/**
1501 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1502 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1503 *
1504 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1505 *
1506 * LOCKING:
cca3974e 1507 * spin_lock_irqsave(host lock)
1da177e4
LT		 1508 *
1509 * RETURNS:
1510 * Zero on success, non-zero on error.
1511 */
ad706991 1512static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1513{
542b1444 1514 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1515 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1516 struct ata_device *dev = qc->dev;
1da177e4 1517 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1518 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1519 u64 block;
1520 u32 n_block;
1da177e4
LT		 1521
1522 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1523 tf->protocol = ATA_PROT_NODATA;
1da177e4 1524
2e5704f6
TH		 1525 if (cdb[0] == VERIFY) {
1526 if (scmd->cmd_len < 10)
1527 goto invalid_fld;
542b1444 1528 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1529 } else if (cdb[0] == VERIFY_16) {
1530 if (scmd->cmd_len < 16)
1531 goto invalid_fld;
542b1444 1532 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1533 } else
ae006510 1534 goto invalid_fld;
1da177e4 1535
8bf62ece 1536 if (!n_block)
ae006510 1537 goto nothing_to_do;
8bf62ece 1538 if (block >= dev_sectors)
ae006510 1539 goto out_of_range;
8bf62ece 1540 if ((block + n_block) > dev_sectors)
ae006510 1541 goto out_of_range;
1da177e4 1542
07506697
AL		 1543 if (dev->flags & ATA_DFLAG_LBA) {
1544 tf->flags |= ATA_TFLAG_LBA;
1545
c6a33e24
AL		 1546 if (lba_28_ok(block, n_block)) {
1547 /* use LBA28 */
1548 tf->command = ATA_CMD_VERIFY;
1549 tf->device |= (block >> 24) & 0xf;
1550 } else if (lba_48_ok(block, n_block)) {
1551 if (!(dev->flags & ATA_DFLAG_LBA48))
1552 goto out_of_range;
07506697
AL		 1553
1554 /* use LBA48 */
1555 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1556 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1557
8bf62ece 1558 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1559
8bf62ece
AL		 1560 tf->hob_lbah = (block >> 40) & 0xff;
1561 tf->hob_lbam = (block >> 32) & 0xff;
1562 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1563 } else
1564 /* request too large even for LBA48 */
1565 goto out_of_range;
8bf62ece
AL		 1566
1567 tf->nsect = n_block & 0xff;
1da177e4 1568
8bf62ece
AL		 1569 tf->lbah = (block >> 16) & 0xff;
1570 tf->lbam = (block >> 8) & 0xff;
1571 tf->lbal = block & 0xff;
1da177e4 1572
8bf62ece
AL		 1573 tf->device |= ATA_LBA;
1574 } else {
1575 /* CHS */
1576 u32 sect, head, cyl, track;
1577
c6a33e24
AL		 1578 if (!lba_28_ok(block, n_block))
1579 goto out_of_range;
07506697 1580
8bf62ece
AL		 1581 /* Convert LBA to CHS */
1582 track = (u32)block / dev->sectors;
1583 cyl = track / dev->heads;
1584 head = track % dev->heads;
1585 sect = (u32)block % dev->sectors + 1;
1586
c187c4b5
AL		 1587 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1588 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1589
1590 /* Check whether the converted CHS can fit.
1591 Cylinder: 0-65535
8bf62ece
AL		 1592 Head: 0-15
1593 Sector: 1-255*/
2e9edbf8 1594 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1595 goto out_of_range;
2e9edbf8 1596
8bf62ece
AL		 1597 tf->command = ATA_CMD_VERIFY;
1598 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1599 tf->lbal = sect;
1600 tf->lbam = cyl;
1601 tf->lbah = cyl >> 8;
1602 tf->device |= head;
1603 }
1da177e4
LT		 1604
1605 return 0;
ae006510
DG		 1606
1607invalid_fld:
542b1444 1608 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1609 /* "Invalid field in cbd" */
1610 return 1;
1611
1612out_of_range:
542b1444 1613 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1614 /* "Logical Block Address out of range" */
1615 return 1;
1616
1617nothing_to_do:
542b1444 1618 scmd->result = SAM_STAT_GOOD;
ae006510 1619 return 1;
1da177e4
LT		 1620}
1621
1622/**
1623 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1624 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1625 *
1626 * Converts any of six SCSI read/write commands into the
1627 * ATA counterpart, including starting sector (LBA),
1628 * sector count, and taking into account the device's LBA48
1629 * support.
1630 *
1631 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1632 * %WRITE_16 are currently supported.
1633 *
1634 * LOCKING:
cca3974e 1635 * spin_lock_irqsave(host lock)
1da177e4
LT		 1636 *
1637 * RETURNS:
1638 * Zero on success, non-zero on error.
1639 */
ad706991 1640static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1641{
542b1444 1642 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1643 const u8 *cdb = scmd->cmnd;
bd056d7e 1644 unsigned int tf_flags = 0;
3aef5231
AL		 1645 u64 block;
1646 u32 n_block;
bd056d7e 1647 int rc;
1da177e4 1648
542b1444 1649 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1650 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1651
9a3dccc4 1652 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1653 switch (cdb[0]) {
3aef5231
AL		 1654 case READ_10:
1655 case WRITE_10:
2e5704f6
TH		 1656 if (unlikely(scmd->cmd_len < 10))
1657 goto invalid_fld;
542b1444 1658 scsi_10_lba_len(cdb, &block, &n_block);
3e451a49 1659 if (cdb[1] & (1 << 3))
bd056d7e 1660 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1661 break;
1662 case READ_6:
1663 case WRITE_6:
2e5704f6
TH		 1664 if (unlikely(scmd->cmd_len < 6))
1665 goto invalid_fld;
542b1444 1666 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1667
1668 /* for 6-byte r/w commands, transfer length 0
1669 * means 256 blocks of data, not 0 block.
1670 */
76b2bf9b
JG		 1671 if (!n_block)
1672 n_block = 256;
3aef5231
AL		 1673 break;
1674 case READ_16:
1675 case WRITE_16:
2e5704f6
TH		 1676 if (unlikely(scmd->cmd_len < 16))
1677 goto invalid_fld;
542b1444 1678 scsi_16_lba_len(cdb, &block, &n_block);
3e451a49 1679 if (cdb[1] & (1 << 3))
bd056d7e 1680 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1681 break;
1682 default:
8bf62ece 1683 DPRINTK("no-byte command\n");
ae006510 1684 goto invalid_fld;
1da177e4
LT		 1685 }
1686
8bf62ece
AL		 1687 /* Check and compose ATA command */
1688 if (!n_block)
c187c4b5
AL		 1689 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1690 * length 0 means transfer 0 block of data.
1691 * However, for ATA R/W commands, sector count 0 means
1692 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1693 *
1694 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1695 */
ae006510 1696 goto nothing_to_do;
1da177e4 1697
bd056d7e 1698 qc->flags |= ATA_QCFLAG_IO;
295124dc 1699 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1700
bd056d7e
TH		 1701 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1702 qc->tag);
1703 if (likely(rc == 0))
1704 return 0;
ae006510 1705
bd056d7e
TH		 1706 if (rc == -ERANGE)
1707 goto out_of_range;
1708 /* treat all other errors as -EINVAL, fall through */
ae006510 1709invalid_fld:
542b1444 1710 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1711 /* "Invalid field in cbd" */
1712 return 1;
1713
1714out_of_range:
542b1444 1715 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1716 /* "Logical Block Address out of range" */
1717 return 1;
1718
1719nothing_to_do:
542b1444 1720 scmd->result = SAM_STAT_GOOD;
ae006510 1721 return 1;
1da177e4
LT		 1722}
1723
77853bf2 1724static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1725{
c31f571d 1726 struct ata_port *ap = qc->ap;
1da177e4 1727 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1728 u8 *cdb = cmd->cmnd;
2dcb407e 1729 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1730
1731 /* For ATA pass thru (SAT) commands, generate a sense block if
1732 * user mandated it or if there's an error. Note that if we
1733 * generate because the user forced us to, a check condition
1734 * is generated and the ATA register values are returned
1735 * whether the command completed successfully or not. If there
1736 * was no error, SK, ASC and ASCQ will all be zero.
1737 */
a7dac447 1738 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1739 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1740 ata_gen_passthru_sense(qc);
b095518e
JG		 1741 } else {
1742 if (!need_sense) {
1743 cmd->result = SAM_STAT_GOOD;
1744 } else {
1745 /* TODO: decide which descriptor format to use
1746 * for 48b LBA devices and call that here
1747 * instead of the fixed desc, which is only
1748 * good for smaller LBA (and maybe CHS?)
1749 * devices.
1750 */
750426aa 1751 ata_gen_ata_sense(qc);
b095518e
JG		 1752 }
1753 }
1da177e4 1754
c31f571d 1755 if (need_sense && !ap->ops->error_handler)
44877b4e 1756 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1757
1758 qc->scsidone(cmd);
1759
77853bf2 1760 ata_qc_free(qc);
1da177e4
LT		 1761}
1762
1763/**
1764 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1765 * @dev: ATA device to which the command is addressed
1766 * @cmd: SCSI command to execute
1da177e4
LT		 1767 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1768 *
1769 * Our ->queuecommand() function has decided that the SCSI
1770 * command issued can be directly translated into an ATA
1771 * command, rather than handled internally.
1772 *
1773 * This function sets up an ata_queued_cmd structure for the
1774 * SCSI command, and sends that ata_queued_cmd to the hardware.
1775 *
ae006510
DG		 1776 * The xlat_func argument (actor) returns 0 if ready to execute
1777 * ATA command, else 1 to finish translation. If 1 is returned
1778 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1779 * to be set reflecting an error condition or clean (early)
1780 * termination.
1781 *
1da177e4 1782 * LOCKING:
cca3974e 1783 * spin_lock_irqsave(host lock)
2115ea94
TH		 1784 *
1785 * RETURNS:
1786 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1787 * needs to be deferred.
1da177e4 1788 */
2115ea94 1789static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1790 ata_xlat_func_t xlat_func)
1da177e4 1791{
31cc23b3 1792 struct ata_port *ap = dev->link->ap;
1da177e4 1793 struct ata_queued_cmd *qc;
31cc23b3 1794 int rc;
1da177e4
LT		 1795
1796 VPRINTK("ENTER\n");
1797
b27dcfb0 1798 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 1799 if (!qc)
ae006510 1800 goto err_mem;
1da177e4
LT		 1801
1802 /* data is present; dma-map it */
be7db055 1803 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1804 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1805 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 1806 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 1807 goto err_did;
1da177e4
LT		 1808 }
1809
7120165c 1810 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1811
1812 qc->dma_dir = cmd->sc_data_direction;
1813 }
1814
1815 qc->complete_fn = ata_scsi_qc_complete;
1816
ad706991 1817 if (xlat_func(qc))
ae006510 1818 goto early_finish;
1da177e4 1819
31cc23b3
TH		 1820 if (ap->ops->qc_defer) {
1821 if ((rc = ap->ops->qc_defer(qc)))
1822 goto defer;
1823 }
1824
1da177e4 1825 /* select device, send command to hardware */
8e0e694a 1826 ata_qc_issue(qc);
1da177e4
LT		 1827
1828 VPRINTK("EXIT\n");
2115ea94 1829 return 0;
1da177e4 1830
ae006510 1831early_finish:
2dcb407e 1832 ata_qc_free(qc);
b27dcfb0 1833 cmd->scsi_done(cmd);
ae006510 1834 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1835 return 0;
ae006510
DG		 1836
1837err_did:
1da177e4 1838 ata_qc_free(qc);
ae006510 1839 cmd->result = (DID_ERROR << 16);
b27dcfb0 1840 cmd->scsi_done(cmd);
253b92ec 1841err_mem:
ae006510 1842 DPRINTK("EXIT - internal\n");
2115ea94 1843 return 0;
3dc1d881
TH		 1844
1845defer:
31cc23b3 1846 ata_qc_free(qc);
3dc1d881 1847 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1848 if (rc == ATA_DEFER_LINK)
1849 return SCSI_MLQUEUE_DEVICE_BUSY;
1850 else
1851 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1852}
1853
1854/**
1855 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1856 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1857 * @flags: unsigned long variable to store irq enable status
1858 * @copy_in: copy in from user buffer
1da177e4 1859 *
87340e98 1860 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1861 *
1862 * LOCKING:
87340e98 1863 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1864 *
1865 * RETURNS:
87340e98 1866 * Pointer to response buffer.
1da177e4 1867 */
87340e98
TH		 1868static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1869 unsigned long *flags)
1da177e4 1870{
87340e98 1871 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1872
87340e98
TH		 1873 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1874 if (copy_in)
1875 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1876 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1877 return ata_scsi_rbuf;
1da177e4
LT		 1878}
1879
1880/**
1881 * ata_scsi_rbuf_put - Unmap response buffer.
1882 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1883 * @copy_out: copy out result
1884 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1885 *
87340e98
TH		 1886 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1887 * @copy_back is true.
1da177e4
LT		 1888 *
1889 * LOCKING:
87340e98 1890 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1891 */
87340e98
TH		 1892static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1893 unsigned long *flags)
1da177e4 1894{
87340e98
TH		 1895 if (copy_out)
1896 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1897 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1898 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1899}
1900
1901/**
1902 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1903 * @args: device IDENTIFY data / SCSI command of interest.
1904 * @actor: Callback hook for desired SCSI command simulator
1905 *
1906 * Takes care of the hard work of simulating a SCSI command...
1907 * Mapping the response buffer, calling the command's handler,
1908 * and handling the handler's return value. This return value
1909 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1910 * completed successfully (0), or not (in which case cmd->result
1911 * and sense buffer are assumed to be set).
1da177e4
LT		 1912 *
1913 * LOCKING:
cca3974e 1914 * spin_lock_irqsave(host lock)
1da177e4 1915 */
f0761be3 1916static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1917 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1918{
1919 u8 *rbuf;
87340e98 1920 unsigned int rc;
1da177e4 1921 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1922 unsigned long flags;
1923
87340e98
TH		 1924 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1925 rc = actor(args, rbuf);
1926 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1927
ae006510 1928 if (rc == 0)
1da177e4 1929 cmd->result = SAM_STAT_GOOD;
ae006510 1930 args->done(cmd);
1da177e4
LT		 1931}
1932
1933/**
1934 * ata_scsiop_inq_std - Simulate INQUIRY command
1935 * @args: device IDENTIFY data / SCSI command of interest.
1936 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1937 *
1938 * Returns standard device identification data associated
b142eb65 1939 * with non-VPD INQUIRY command output.
1da177e4
LT		 1940 *
1941 * LOCKING:
cca3974e 1942 * spin_lock_irqsave(host lock)
1da177e4 1943 */
87340e98 1944static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1945{
87340e98
TH		 1946 const u8 versions[] = {
1947 0x60, /* SAM-3 (no version claimed) */
1948
1949 0x03,
1950 0x20, /* SBC-2 (no version claimed) */
1951
1952 0x02,
1953 0x60 /* SPC-3 (no version claimed) */
1954 };
1da177e4
LT		 1955 u8 hdr[] = {
1956 TYPE_DISK,
1957 0,
1958 0x5, /* claim SPC-3 version compatibility */
1959 2,
1960 95 - 4
1961 };
1962
87340e98
TH		 1963 VPRINTK("ENTER\n");
1964
1da177e4
LT		 1965 /* set scsi removeable (RMB) bit per ata bit */
1966 if (ata_id_removeable(args->id))
1967 hdr[1] |= (1 << 7);
1968
1da177e4 1969 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1970 memcpy(&rbuf[8], "ATA ", 8);
1971 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1972 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1973
87340e98
TH		 1974 if (rbuf[32] == 0 || rbuf[32] == ' ')
1975 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1976
87340e98 1977 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1978
1979 return 0;
1980}
1981
1982/**
b142eb65 1983 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1984 * @args: device IDENTIFY data / SCSI command of interest.
1985 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1986 *
b142eb65 1987 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1988 *
1989 * LOCKING:
cca3974e 1990 * spin_lock_irqsave(host lock)
1da177e4 1991 */
87340e98 1992static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1993{
1994 const u8 pages[] = {
1995 0x00, /* page 0x00, this page */
1996 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 1997 0x83, /* page 0x83, device ident page */
1998 0x89, /* page 0x89, ata info page */
18f0f978 1999 0xb0, /* page 0xb0, block limits page */
1e9dbc92 2000 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 2001 0xb2, /* page 0xb2, thin provisioning page */
1da177e4 2002 };
1da177e4 2003
87340e98
TH		 2004 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2005 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2006 return 0;
2007}
2008
2009/**
b142eb65 2010 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2011 * @args: device IDENTIFY data / SCSI command of interest.
2012 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2013 *
2014 * Returns ATA device serial number.
2015 *
2016 * LOCKING:
cca3974e 2017 * spin_lock_irqsave(host lock)
1da177e4 2018 */
87340e98 2019static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2020{
2021 const u8 hdr[] = {
2022 0,
2023 0x80, /* this page code */
2024 0,
a0cf733b 2025 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2026 };
1da177e4 2027
87340e98
TH		 2028 memcpy(rbuf, hdr, sizeof(hdr));
2029 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2030 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2031 return 0;
2032}
2033
1da177e4 2034/**
b142eb65 2035 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2036 * @args: device IDENTIFY data / SCSI command of interest.
2037 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2038 *
b142eb65
JG		 2039 * Yields two logical unit device identification designators:
2040 * - vendor specific ASCII containing the ATA serial number
2041 * - SAT defined "t10 vendor id based" containing ASCII vendor
2042 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2043 *
2044 * LOCKING:
cca3974e 2045 * spin_lock_irqsave(host lock)
1da177e4 2046 */
87340e98 2047static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2048{
b142eb65 2049 const int sat_model_serial_desc_len = 68;
87340e98 2050 int num;
1da177e4 2051
b142eb65
JG		 2052 rbuf[1] = 0x83; /* this page code */
2053 num = 4;
2054
87340e98
TH		 2055 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2056 rbuf[num + 0] = 2;
2057 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2058 num += 4;
2059 ata_id_string(args->id, (unsigned char *) rbuf + num,
2060 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2061 num += ATA_ID_SERNO_LEN;
2062
2063 /* SAT defined lu model and serial numbers descriptor */
2064 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2065 rbuf[num + 0] = 2;
2066 rbuf[num + 1] = 1;
2067 rbuf[num + 3] = sat_model_serial_desc_len;
2068 num += 4;
2069 memcpy(rbuf + num, "ATA ", 8);
2070 num += 8;
2071 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2072 ATA_ID_PROD_LEN);
2073 num += ATA_ID_PROD_LEN;
2074 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2075 ATA_ID_SERNO_LEN);
2076 num += ATA_ID_SERNO_LEN;
2077
6b3b9d73
HR		 2078 if (ata_id_has_wwn(args->id)) {
2079 /* SAT defined lu world wide name */
2080 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2081 rbuf[num + 0] = 1;
2082 rbuf[num + 1] = 3;
2083 rbuf[num + 3] = ATA_ID_WWN_LEN;
2084 num += 4;
2085 ata_id_string(args->id, (unsigned char *) rbuf + num,
2086 ATA_ID_WWN, ATA_ID_WWN_LEN);
2087 num += ATA_ID_WWN_LEN;
2088 }
b142eb65 2089 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2090 return 0;
2091}
2092
ad355b46
JG		 2093/**
2094 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2095 * @args: device IDENTIFY data / SCSI command of interest.
2096 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2097 *
2098 * Yields SAT-specified ATA VPD page.
2099 *
2100 * LOCKING:
2101 * spin_lock_irqsave(host lock)
2102 */
87340e98 2103static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2104{
ad355b46 2105 struct ata_taskfile tf;
ad355b46 2106
ad355b46
JG		 2107 memset(&tf, 0, sizeof(tf));
2108
87340e98
TH		 2109 rbuf[1] = 0x89; /* our page code */
2110 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2111 rbuf[3] = (0x238 & 0xff);
ad355b46 2112
87340e98
TH		 2113 memcpy(&rbuf[8], "linux ", 8);
2114 memcpy(&rbuf[16], "libata ", 16);
2115 memcpy(&rbuf[32], DRV_VERSION, 4);
2116 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2117
2118 /* we don't store the ATA device signature, so we fake it */
2119
2120 tf.command = ATA_DRDY; /* really, this is Status reg */
2121 tf.lbal = 0x1;
2122 tf.nsect = 0x1;
2123
87340e98
TH		 2124 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2125 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2126
87340e98 2127 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2128
87340e98 2129 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2130 return 0;
2131}
2132
18f0f978
CH		 2133static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2134{
295124dc 2135 u16 min_io_sectors;
18f0f978
CH		 2136
2137 rbuf[1] = 0xb0;
2138 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2139
2140 /*
2141 * Optimal transfer length granularity.
2142 *
2143 * This is always one physical block, but for disks with a smaller
2144 * logical than physical sector size we need to figure out what the
2145 * latter is.
2146 */
295124dc 2147 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2148 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2149
2150 /*
2151 * Optimal unmap granularity.
2152 *
2153 * The ATA spec doesn't even know about a granularity or alignment
2154 * for the TRIM command. We can leave away most of the unmap related
2155 * VPD page entries, but we have specifify a granularity to signal
2156 * that we support some form of unmap - in thise case via WRITE SAME
2157 * with the unmap bit set.
2158 */
e78db4df 2159 if (ata_id_has_trim(args->id)) {
5f4e2066 2160 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
18f0f978 2161 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2162 }
18f0f978
CH		 2163
2164 return 0;
2165}
2166
1e9dbc92
MW		 2167static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2168{
4bca3286
MP		 2169 int form_factor = ata_id_form_factor(args->id);
2170 int media_rotation_rate = ata_id_rotation_rate(args->id);
2171
1e9dbc92
MW		 2172 rbuf[1] = 0xb1;
2173 rbuf[3] = 0x3c;
4bca3286
MP		 2174 rbuf[4] = media_rotation_rate >> 8;
2175 rbuf[5] = media_rotation_rate;
2176 rbuf[7] = form_factor;
1e9dbc92
MW		 2177
2178 return 0;
2179}
2180
02e0a604
MP		 2181static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2182{
2183 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2184 rbuf[1] = 0xb2;
2185 rbuf[3] = 0x4;
2186 rbuf[5] = 1 << 6; /* TPWS */
2187
2188 return 0;
2189}
2190
1da177e4 2191/**
0cba632b 2192 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2193 * @args: device IDENTIFY data / SCSI command of interest.
2194 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2195 *
2196 * No operation. Simply returns success to caller, to indicate
2197 * that the caller should successfully complete this SCSI command.
2198 *
2199 * LOCKING:
cca3974e 2200 * spin_lock_irqsave(host lock)
1da177e4 2201 */
87340e98 2202static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2203{
2204 VPRINTK("ENTER\n");
2205 return 0;
2206}
2207
6ca8e794
PB		 2208/**
2209 * modecpy - Prepare response for MODE SENSE
2210 * @dest: output buffer
2211 * @src: data being copied
2212 * @n: length of mode page
2213 * @changeable: whether changeable parameters are requested
2214 *
2215 * Generate a generic MODE SENSE page for either current or changeable
2216 * parameters.
2217 *
2218 * LOCKING:
2219 * None.
2220 */
2221static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2222{
2223 if (changeable) {
2224 memcpy(dest, src, 2);
2225 memset(dest + 2, 0, n - 2);
2226 } else {
2227 memcpy(dest, src, n);
2228 }
2229}
2230
1da177e4
LT		 2231/**
2232 * ata_msense_caching - Simulate MODE SENSE caching info page
2233 * @id: device IDENTIFY data
87340e98 2234 * @buf: output buffer
6ca8e794 2235 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2236 *
2237 * Generate a caching info page, which conditionally indicates
2238 * write caching to the SCSI layer, depending on device
2239 * capabilities.
2240 *
2241 * LOCKING:
2242 * None.
2243 */
6ca8e794 2244static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
1da177e4 2245{
6ca8e794 2246 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
1b26d29c 2247 if (changeable || ata_id_wcache_enabled(id))
87340e98 2248 buf[2] |= (1 << 2); /* write cache enable */
6ca8e794 2249 if (!changeable && !ata_id_rahead_enabled(id))
87340e98
TH		 2250 buf[12] |= (1 << 5); /* disable read ahead */
2251 return sizeof(def_cache_mpage);
1da177e4
LT		 2252}
2253
2254/**
2255 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2256 * @buf: output buffer
6ca8e794 2257 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2258 *
2259 * Generate a generic MODE SENSE control mode page.
2260 *
2261 * LOCKING:
2262 * None.
2263 */
6ca8e794 2264static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
1da177e4 2265{
6ca8e794 2266 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
00ac37f5 2267 return sizeof(def_control_mpage);
1da177e4
LT		 2268}
2269
2270/**
2271 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2272 * @buf: output buffer
6ca8e794 2273 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2274 *
2275 * Generate a generic MODE SENSE r/w error recovery page.
2276 *
2277 * LOCKING:
2278 * None.
2279 */
6ca8e794 2280static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
1da177e4 2281{
6ca8e794
PB		 2282 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2283 changeable);
00ac37f5 2284 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2285}
2286
48bdc8ec
JA		 2287/*
2288 * We can turn this into a real blacklist if it's needed, for now just
2289 * blacklist any Maxtor BANC1G10 revision firmware
2290 */
2291static int ata_dev_supports_fua(u16 *id)
2292{
a0cf733b 2293 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2294
c3c013a2
JG		 2295 if (!libata_fua)
2296 return 0;
48bdc8ec
JA		 2297 if (!ata_id_has_fua(id))
2298 return 0;
2299
a0cf733b
TH		 2300 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2301 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2302
2e02671d 2303 if (strcmp(model, "Maxtor"))
48bdc8ec 2304 return 1;
2e02671d 2305 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2306 return 1;
2307
2308 return 0; /* blacklisted */
2309}
2310
1da177e4
LT		 2311/**
2312 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2313 * @args: device IDENTIFY data / SCSI command of interest.
2314 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2315 *
00ac37f5
DG		 2316 * Simulate MODE SENSE commands. Assume this is invoked for direct
2317 * access devices (e.g. disks) only. There should be no block
2318 * descriptor for other device types.
1da177e4
LT		 2319 *
2320 * LOCKING:
cca3974e 2321 * spin_lock_irqsave(host lock)
1da177e4 2322 */
87340e98 2323static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2324{
9a3dccc4 2325 struct ata_device *dev = args->dev;
87340e98 2326 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2327 const u8 sat_blk_desc[] = {
2328 0, 0, 0, 0, /* number of blocks: sat unspecified */
2329 0,
2330 0, 0x2, 0x0 /* block length: 512 bytes */
2331 };
2332 u8 pg, spg;
87340e98 2333 unsigned int ebd, page_control, six_byte;
9a3dccc4 2334 u8 dpofua;
1da177e4
LT		 2335
2336 VPRINTK("ENTER\n");
2337
2338 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2339 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2340 /*
2341 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2342 */
00ac37f5 2343
1da177e4 2344 page_control = scsicmd[2] >> 6;
ae006510
DG		 2345 switch (page_control) {
2346 case 0: /* current */
6ca8e794
PB		 2347 case 1: /* changeable */
2348 case 2: /* defaults */
ae006510
DG		 2349 break; /* supported */
2350 case 3: /* saved */
2351 goto saving_not_supp;
ae006510
DG		 2352 default:
2353 goto invalid_fld;
2354 }
1da177e4 2355
87340e98
TH		 2356 if (six_byte)
2357 p += 4 + (ebd ? 8 : 0);
2358 else
2359 p += 8 + (ebd ? 8 : 0);
1da177e4 2360
00ac37f5
DG		 2361 pg = scsicmd[2] & 0x3f;
2362 spg = scsicmd[3];
2363 /*
2364 * No mode subpages supported (yet) but asking for _all_
2365 * subpages may be valid
2366 */
2367 if (spg && (spg != ALL_SUB_MPAGES))
2368 goto invalid_fld;
2369
2370 switch(pg) {
2371 case RW_RECOVERY_MPAGE:
6ca8e794 2372 p += ata_msense_rw_recovery(p, page_control == 1);
1da177e4
LT		 2373 break;
2374
00ac37f5 2375 case CACHE_MPAGE:
6ca8e794 2376 p += ata_msense_caching(args->id, p, page_control == 1);
1da177e4
LT		 2377 break;
2378
87340e98 2379 case CONTROL_MPAGE:
6ca8e794 2380 p += ata_msense_ctl_mode(p, page_control == 1);
1da177e4 2381 break;
1da177e4 2382
00ac37f5 2383 case ALL_MPAGES:
6ca8e794
PB		 2384 p += ata_msense_rw_recovery(p, page_control == 1);
2385 p += ata_msense_caching(args->id, p, page_control == 1);
2386 p += ata_msense_ctl_mode(p, page_control == 1);
1da177e4
LT		 2387 break;
2388
2389 default: /* invalid page code */
ae006510 2390 goto invalid_fld;
1da177e4
LT		 2391 }
2392
9a3dccc4 2393 dpofua = 0;
f79d409f 2394 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2395 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2396 dpofua = 1 << 4;
2397
1da177e4 2398 if (six_byte) {
87340e98
TH		 2399 rbuf[0] = p - rbuf - 1;
2400 rbuf[2] |= dpofua;
00ac37f5 2401 if (ebd) {
87340e98
TH		 2402 rbuf[3] = sizeof(sat_blk_desc);
2403 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2404 }
1da177e4 2405 } else {
87340e98
TH		 2406 unsigned int output_len = p - rbuf - 2;
2407
1da177e4 2408 rbuf[0] = output_len >> 8;
87340e98
TH		 2409 rbuf[1] = output_len;
2410 rbuf[3] |= dpofua;
00ac37f5 2411 if (ebd) {
87340e98
TH		 2412 rbuf[7] = sizeof(sat_blk_desc);
2413 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2414 }
1da177e4 2415 }
1da177e4 2416 return 0;
ae006510
DG		 2417
2418invalid_fld:
2419 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2420 /* "Invalid field in cbd" */
2421 return 1;
2422
2423saving_not_supp:
2424 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2425 /* "Saving parameters not supported" */
2426 return 1;
1da177e4
LT		 2427}
2428
2429/**
2430 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2431 * @args: device IDENTIFY data / SCSI command of interest.
2432 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2433 *
2434 * Simulate READ CAPACITY commands.
2435 *
2436 * LOCKING:
6a36261e 2437 * None.
1da177e4 2438 */
87340e98 2439static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2440{
61d79a8e
MP		 2441 struct ata_device *dev = args->dev;
2442 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2443 u32 sector_size; /* physical sector size in bytes */
2444 u8 log2_per_phys;
2445 u16 lowest_aligned;
2446
2447 sector_size = ata_id_logical_sector_size(dev->id);
2448 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2449 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2450
2451 VPRINTK("ENTER\n");
2452
1da177e4 2453 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2454 if (last_lba >= 0xffffffffULL)
2455 last_lba = 0xffffffff;
0c144d0d 2456
1da177e4 2457 /* sector count, 32-bit */
87340e98
TH		 2458 rbuf[0] = last_lba >> (8 * 3);
2459 rbuf[1] = last_lba >> (8 * 2);
2460 rbuf[2] = last_lba >> (8 * 1);
2461 rbuf[3] = last_lba;
1da177e4
LT		 2462
2463 /* sector size */
295124dc
GG		 2464 rbuf[4] = sector_size >> (8 * 3);
2465 rbuf[5] = sector_size >> (8 * 2);
2466 rbuf[6] = sector_size >> (8 * 1);
2467 rbuf[7] = sector_size;
1da177e4
LT		 2468 } else {
2469 /* sector count, 64-bit */
87340e98
TH		 2470 rbuf[0] = last_lba >> (8 * 7);
2471 rbuf[1] = last_lba >> (8 * 6);
2472 rbuf[2] = last_lba >> (8 * 5);
2473 rbuf[3] = last_lba >> (8 * 4);
2474 rbuf[4] = last_lba >> (8 * 3);
2475 rbuf[5] = last_lba >> (8 * 2);
2476 rbuf[6] = last_lba >> (8 * 1);
2477 rbuf[7] = last_lba;
1da177e4
LT		 2478
2479 /* sector size */
295124dc
GG		 2480 rbuf[ 8] = sector_size >> (8 * 3);
2481 rbuf[ 9] = sector_size >> (8 * 2);
2482 rbuf[10] = sector_size >> (8 * 1);
2483 rbuf[11] = sector_size;
61d79a8e
MP		 2484
2485 rbuf[12] = 0;
295124dc 2486 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2487 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2488 rbuf[15] = lowest_aligned;
18f0f978 2489
e78db4df
MP		 2490 if (ata_id_has_trim(args->id)) {
2491 rbuf[14] |= 0x80; /* TPE */
2492
2493 if (ata_id_has_zero_after_trim(args->id))
2494 rbuf[14] |= 0x40; /* TPRZ */
2495 }
1da177e4
LT		 2496 }
2497
2498 return 0;
2499}
2500
2501/**
2502 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2503 * @args: device IDENTIFY data / SCSI command of interest.
2504 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2505 *
2506 * Simulate REPORT LUNS command.
2507 *
2508 * LOCKING:
cca3974e 2509 * spin_lock_irqsave(host lock)
1da177e4 2510 */
87340e98 2511static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2512{
2513 VPRINTK("ENTER\n");
2514 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2515
2516 return 0;
2517}
2518
77853bf2 2519static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2520{
74e6c8c3 2521 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2522 /* FIXME: not quite right; we don't want the
2523 * translation of taskfile registers into
2524 * a sense descriptors, since that's only
2525 * correct for ATA, not ATAPI
2526 */
750426aa 2527 ata_gen_passthru_sense(qc);
74e6c8c3 2528 }
a939c963 2529
c6e6e666 2530 qc->scsidone(qc->scsicmd);
77853bf2 2531 ata_qc_free(qc);
c6e6e666 2532}
a939c963 2533
c6e6e666
JG		 2534/* is it pointless to prefer PIO for "safety reasons"? */
2535static inline int ata_pio_use_silly(struct ata_port *ap)
2536{
2537 return (ap->flags & ATA_FLAG_PIO_DMA);
2538}
2539
2540static void atapi_request_sense(struct ata_queued_cmd *qc)
2541{
2542 struct ata_port *ap = qc->ap;
2543 struct scsi_cmnd *cmd = qc->scsicmd;
2544
2545 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2546
2547 /* FIXME: is this needed? */
7ccd720d 2548 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2549
127102ae 2550#ifdef CONFIG_ATA_SFF
855d854a
JB		 2551 if (ap->ops->sff_tf_read)
2552 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2553#endif
c6e6e666
JG		 2554
2555 /* fill these in, for the case where they are -not- overwritten */
2556 cmd->sense_buffer[0] = 0x70;
2557 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2558
2559 ata_qc_reinit(qc);
2560
93f8fecb 2561 /* setup sg table and init transfer direction */
cadb7345 2562 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2563 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2564 qc->dma_dir = DMA_FROM_DEVICE;
2565
6e7846e9 2566 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2567 qc->cdb[0] = REQUEST_SENSE;
2568 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2569
2570 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2571 qc->tf.command = ATA_CMD_PACKET;
2572
c6e6e666 2573 if (ata_pio_use_silly(ap)) {
0dc36888 2574 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2575 qc->tf.feature |= ATAPI_PKT_DMA;
2576 } else {
0dc36888 2577 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2578 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2579 qc->tf.lbah = 0;
c6e6e666 2580 }
a939c963
JG		 2581 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2582
c6e6e666 2583 qc->complete_fn = atapi_sense_complete;
a939c963 2584
8e0e694a 2585 ata_qc_issue(qc);
a939c963
JG		 2586
2587 DPRINTK("EXIT\n");
2588}
2589
77853bf2 2590static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2591{
2592 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2593 unsigned int err_mask = qc->err_mask;
1da177e4 2594
a7dac447 2595 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2596
246619da
TH		 2597 /* handle completion from new EH */
2598 if (unlikely(qc->ap->ops->error_handler &&
2599 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2600
2601 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2602 /* FIXME: not quite right; we don't want the
2603 * translation of taskfile registers into a
2604 * sense descriptors, since that's only
2605 * correct for ATA, not ATAPI
2606 */
750426aa 2607 ata_gen_passthru_sense(qc);
246619da
TH		 2608 }
2609
22aac089
TH		 2610 /* SCSI EH automatically locks door if sdev->locked is
2611 * set. Sometimes door lock request continues to
2612 * fail, for example, when no media is present. This
2613 * creates a loop - SCSI EH issues door lock which
2614 * fails and gets invoked again to acquire sense data
2615 * for the failed command.
2616 *
2617 * If door lock fails, always clear sdev->locked to
2618 * avoid this infinite loop.
2a5f07b5
TH		 2619 *
2620 * This may happen before SCSI scan is complete. Make
2621 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2622 */
2a5f07b5 2623 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2624 qc->dev->sdev->locked = 0;
2625
246619da
TH		 2626 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2627 qc->scsidone(cmd);
2628 ata_qc_free(qc);
2629 return;
2630 }
2631
2632 /* successful completion or old EH failure path */
a7dac447 2633 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2634 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2635 atapi_request_sense(qc);
77853bf2 2636 return;
74e6c8c3 2637 } else if (unlikely(err_mask)) {
a7dac447
JG		 2638 /* FIXME: not quite right; we don't want the
2639 * translation of taskfile registers into
2640 * a sense descriptors, since that's only
2641 * correct for ATA, not ATAPI
2642 */
750426aa 2643 ata_gen_passthru_sense(qc);
74e6c8c3 2644 } else {
1da177e4
LT		 2645 u8 *scsicmd = cmd->cmnd;
2646
fd71da46 2647 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2648 unsigned long flags;
87340e98 2649 u8 *buf;
b445c568 2650
87340e98 2651 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2652
2653 /* ATAPI devices typically report zero for their SCSI version,
2654 * and sometimes deviate from the spec WRT response data
2655 * format. If SCSI version is reported as zero like normal,
2656 * then we make the following fixups: 1) Fake MMC-5 version,
2657 * to indicate to the Linux scsi midlayer this is a modern
2658 * device. 2) Ensure response data format / ATAPI information
2659 * are always correct.
a15dbeb4
JG		 2660 */
2661 if (buf[2] == 0) {
2662 buf[2] = 0x5;
2663 buf[3] = 0x32;
2664 }
2665
87340e98 2666 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2667 }
a15dbeb4 2668
1da177e4
LT		 2669 cmd->result = SAM_STAT_GOOD;
2670 }
2671
2672 qc->scsidone(cmd);
77853bf2 2673 ata_qc_free(qc);
1da177e4
LT		 2674}
2675/**
2676 * atapi_xlat - Initialize PACKET taskfile
2677 * @qc: command structure to be initialized
1da177e4
LT		 2678 *
2679 * LOCKING:
cca3974e 2680 * spin_lock_irqsave(host lock)
1da177e4
LT		 2681 *
2682 * RETURNS:
2683 * Zero on success, non-zero on failure.
2684 */
ad706991 2685static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2686{
542b1444 2687 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2688 struct ata_device *dev = qc->dev;
542b1444 2689 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2690 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2691 unsigned int nbytes;
1da177e4 2692
2e5704f6
TH		 2693 memset(qc->cdb, 0, dev->cdb_len);
2694 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2695
2696 qc->complete_fn = atapi_qc_complete;
2697
2698 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2699 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2700 qc->tf.flags |= ATA_TFLAG_WRITE;
2701 DPRINTK("direction: write\n");
2702 }
2703
2704 qc->tf.command = ATA_CMD_PACKET;
aacda375 2705 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2706
2707 /* check whether ATAPI DMA is safe */
5895ef9a 2708 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2709 using_pio = 1;
1da177e4 2710
e190222d
TH		 2711 /* Some controller variants snoop this value for Packet
2712 * transfers to do state machine and FIFO management. Thus we
2713 * want to set it properly, and for DMA where it is
2714 * effectively meaningless.
2715 */
aacda375 2716 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2717
e190222d
TH		 2718 /* Most ATAPI devices which honor transfer chunk size don't
2719 * behave according to the spec when odd chunk size which
2720 * matches the transfer length is specified. If the number of
2721 * bytes to transfer is 2n+1. According to the spec, what
2722 * should happen is to indicate that 2n+1 is going to be
2723 * transferred and transfer 2n+2 bytes where the last byte is
2724 * padding.
2725 *
2726 * In practice, this doesn't happen. ATAPI devices first
2727 * indicate and transfer 2n bytes and then indicate and
2728 * transfer 2 bytes where the last byte is padding.
2729 *
2730 * This inconsistency confuses several controllers which
2731 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2732 * These controllers use actual number of transferred bytes to
2733 * update DMA poitner and transfer of 4n+2 bytes make those
2734 * controller push DMA pointer by 4n+4 bytes because SATA data
2735 * FISes are aligned to 4 bytes. This causes data corruption
2736 * and buffer overrun.
2737 *
2738 * Always setting nbytes to even number solves this problem
2739 * because then ATAPI devices don't have to split data at 2n
2740 * boundaries.
2741 */
2742 if (nbytes & 0x1)
2743 nbytes++;
2744
2db78dd3
AC		 2745 qc->tf.lbam = (nbytes & 0xFF);
2746 qc->tf.lbah = (nbytes >> 8);
2747
5895ef9a
TH		 2748 if (nodata)
2749 qc->tf.protocol = ATAPI_PROT_NODATA;
2750 else if (using_pio)
2751 qc->tf.protocol = ATAPI_PROT_PIO;
2752 else {
e00f1ff3 2753 /* DMA data xfer */
0dc36888 2754 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2755 qc->tf.feature |= ATAPI_PKT_DMA;
2756
91163006
TH		 2757 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2758 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2759 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2760 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2761 }
2762
2db78dd3
AC		 2763
2764 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2765 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2766 return 0;
2767}
2768
2dcb407e 2769static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2770{
071f44b1 2771 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2772 if (likely(devno < ata_link_max_devices(&ap->link)))
2773 return &ap->link.device[devno];
2774 } else {
2775 if (likely(devno < ap->nr_pmp_links))
2776 return &ap->pmp_link[devno].device[0];
2777 }
2778
ab5b3a5b
TH		 2779 return NULL;
2780}
2781
2dcb407e
JG		 2782static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2783 const struct scsi_device *scsidev)
ab5b3a5b 2784{
41bda9c9
TH		 2785 int devno;
2786
ab5b3a5b 2787 /* skip commands not addressed to targets we simulate */
071f44b1 2788 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2789 if (unlikely(scsidev->channel || scsidev->lun))
2790 return NULL;
2791 devno = scsidev->id;
2792 } else {
2793 if (unlikely(scsidev->id || scsidev->lun))
2794 return NULL;
2795 devno = scsidev->channel;
2796 }
ab5b3a5b 2797
41bda9c9 2798 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2799}
2800
1da177e4
LT		 2801/**
2802 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2803 * @ap: ATA port to which the device is attached
2804 * @scsidev: SCSI device from which we derive the ATA device
2805 *
2806 * Given various information provided in struct scsi_cmnd,
2807 * map that onto an ATA bus, and using that mapping
2808 * determine which ata_device is associated with the
2809 * SCSI command to be sent.
2810 *
2811 * LOCKING:
cca3974e 2812 * spin_lock_irqsave(host lock)
1da177e4
LT		 2813 *
2814 * RETURNS:
2815 * Associated ATA device, or %NULL if not found.
2816 */
1da177e4 2817static struct ata_device *
057ace5e 2818ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2819{
ab5b3a5b 2820 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2821
2486fa56 2822 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2823 return NULL;
2824
1da177e4
LT		 2825 return dev;
2826}
2827
b095518e
JG		 2828/*
2829 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2830 * @byte1: Byte 1 from pass-thru CDB.
2831 *
2832 * RETURNS:
2833 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2834 */
2835static u8
2836ata_scsi_map_proto(u8 byte1)
2837{
2838 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2839 case 3: /* Non-data */
2840 return ATA_PROT_NODATA;
2841
2842 case 6: /* DMA */
2843 case 10: /* UDMA Data-in */
2844 case 11: /* UDMA Data-Out */
2845 return ATA_PROT_DMA;
2846
2847 case 4: /* PIO Data-in */
2848 case 5: /* PIO Data-out */
2849 return ATA_PROT_PIO;
2850
2851 case 0: /* Hard Reset */
2852 case 1: /* SRST */
2853 case 8: /* Device Diagnostic */
2854 case 9: /* Device Reset */
2855 case 7: /* DMA Queued */
2856 case 12: /* FPDMA */
2857 case 15: /* Return Response Info */
2858 default: /* Reserved */
2859 break;
b095518e
JG		 2860 }
2861
2862 return ATA_PROT_UNKNOWN;
2863}
2864
2865/**
2866 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2867 * @qc: command structure to be initialized
b095518e
JG		 2868 *
2869 * Handles either 12 or 16-byte versions of the CDB.
2870 *
2871 * RETURNS:
2872 * Zero on success, non-zero on failure.
2873 */
ad706991 2874static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2875{
2876 struct ata_taskfile *tf = &(qc->tf);
542b1444 2877 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2878 struct ata_device *dev = qc->dev;
ad706991 2879 const u8 *cdb = scmd->cmnd;
b095518e 2880
542b1444 2881 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2882 goto invalid_fld;
8190bdb9 2883
b095518e
JG		 2884 /*
2885 * 12 and 16 byte CDBs use different offsets to
2886 * provide the various register values.
2887 */
542b1444 2888 if (cdb[0] == ATA_16) {
b095518e
JG		 2889 /*
2890 * 16-byte CDB - may contain extended commands.
2891 *
2892 * If that is the case, copy the upper byte register values.
2893 */
542b1444
TH		 2894 if (cdb[1] & 0x01) {
2895 tf->hob_feature = cdb[3];
2896 tf->hob_nsect = cdb[5];
2897 tf->hob_lbal = cdb[7];
2898 tf->hob_lbam = cdb[9];
2899 tf->hob_lbah = cdb[11];
b095518e
JG		 2900 tf->flags |= ATA_TFLAG_LBA48;
2901 } else
2902 tf->flags &= ~ATA_TFLAG_LBA48;
2903
2904 /*
2905 * Always copy low byte, device and command registers.
2906 */
542b1444
TH		 2907 tf->feature = cdb[4];
2908 tf->nsect = cdb[6];
2909 tf->lbal = cdb[8];
2910 tf->lbam = cdb[10];
2911 tf->lbah = cdb[12];
2912 tf->device = cdb[13];
2913 tf->command = cdb[14];
b095518e
JG		 2914 } else {
2915 /*
2916 * 12-byte CDB - incapable of extended commands.
2917 */
2918 tf->flags &= ~ATA_TFLAG_LBA48;
2919
542b1444
TH		 2920 tf->feature = cdb[3];
2921 tf->nsect = cdb[4];
2922 tf->lbal = cdb[5];
2923 tf->lbam = cdb[6];
2924 tf->lbah = cdb[7];
2925 tf->device = cdb[8];
2926 tf->command = cdb[9];
b095518e 2927 }
fa4453c4
AL		 2928
2929 /* enforce correct master/slave bit */
2930 tf->device = dev->devno ?
2931 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2932
bd30add8 2933 switch (tf->command) {
295124dc 2934 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 2935 case ATA_CMD_READ_LONG:
2936 case ATA_CMD_READ_LONG_ONCE:
2937 case ATA_CMD_WRITE_LONG:
2938 case ATA_CMD_WRITE_LONG_ONCE:
2939 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2940 goto invalid_fld;
2941 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 2942 break;
2943
2944 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2945 case ATA_CMD_CFA_WRITE_NE:
2946 case ATA_CMD_CFA_TRANS_SECT:
2947 case ATA_CMD_CFA_WRITE_MULT_NE:
2948 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2949 case ATA_CMD_READ:
2950 case ATA_CMD_READ_EXT:
2951 case ATA_CMD_READ_QUEUED:
2952 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2953 case ATA_CMD_FPDMA_READ:
2954 case ATA_CMD_READ_MULTI:
2955 case ATA_CMD_READ_MULTI_EXT:
2956 case ATA_CMD_PIO_READ:
2957 case ATA_CMD_PIO_READ_EXT:
2958 case ATA_CMD_READ_STREAM_DMA_EXT:
2959 case ATA_CMD_READ_STREAM_EXT:
2960 case ATA_CMD_VERIFY:
2961 case ATA_CMD_VERIFY_EXT:
2962 case ATA_CMD_WRITE:
2963 case ATA_CMD_WRITE_EXT:
2964 case ATA_CMD_WRITE_FUA_EXT:
2965 case ATA_CMD_WRITE_QUEUED:
2966 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2967 case ATA_CMD_FPDMA_WRITE:
2968 case ATA_CMD_WRITE_MULTI:
2969 case ATA_CMD_WRITE_MULTI_EXT:
2970 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2971 case ATA_CMD_PIO_WRITE:
2972 case ATA_CMD_PIO_WRITE_EXT:
2973 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2974 case ATA_CMD_WRITE_STREAM_EXT:
2975 qc->sect_size = scmd->device->sector_size;
2976 break;
2977
2978 /* Everything else uses 512 byte "sectors" */
2979 default:
2980 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 2981 }
2982
2983 /*
2984 * Set flags so that all registers will be written, pass on
2985 * write indication (used for PIO/DMA setup), result TF is
2986 * copied back and we don't whine too much about its failure.
2987 */
bc496ed0 2988 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 2989 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2990 tf->flags |= ATA_TFLAG_WRITE;
2991
2992 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2993
2994 /*
2995 * Set transfer length.
2996 *
2997 * TODO: find out if we need to do more here to
2998 * cover scatter/gather case.
2999 */
3000 ata_qc_set_pc_nbytes(qc);
3001
3002 /* We may not issue DMA commands if no DMA mode is set */
3003 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3004 goto invalid_fld;
3005
1dce589c
AL		 3006 /* sanity check for pio multi commands */
3007 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3008 goto invalid_fld;
3009
3010 if (is_multi_taskfile(tf)) {
3011 unsigned int multi_count = 1 << (cdb[1] >> 5);
3012
3013 /* compare the passed through multi_count
3014 * with the cached multi_count of libata
3015 */
3016 if (multi_count != dev->multi_count)
a9a79dfe
JP		 3017 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3018 multi_count);
d26fc955 3019 }
1dce589c 3020
b095518e
JG		 3021 /*
3022 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3023 * SET_FEATURES - XFER MODE must be preceded/succeeded
3024 * by an update to hardware-specific registers for each
3025 * controller (i.e. the reason for ->set_piomode(),
3026 * ->set_dmamode(), and ->post_set_mode() hooks).
3027 */
bd30add8
TH		 3028 if (tf->command == ATA_CMD_SET_FEATURES &&
3029 tf->feature == SETFEATURES_XFER)
9a405257 3030 goto invalid_fld;
b095518e
JG		 3031
3032 /*
bd30add8
TH		 3033 * Filter TPM commands by default. These provide an
3034 * essentially uncontrolled encrypted "back door" between
3035 * applications and the disk. Set libata.allow_tpm=1 if you
3036 * have a real reason for wanting to use them. This ensures
3037 * that installed software cannot easily mess stuff up without
3038 * user intent. DVR type users will probably ship with this enabled
3039 * for movie content management.
b095518e 3040 *
bd30add8
TH		 3041 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3042 * for this and should do in future but that it is not sufficient as
3043 * DCS is an optional feature set. Thus we also do the software filter
3044 * so that we comply with the TC consortium stated goal that the user
3045 * can turn off TC features of their system.
b095518e 3046 */
bd30add8
TH		 3047 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3048 goto invalid_fld;
e61e0672 3049
b095518e 3050 return 0;
9a405257
TH		 3051
3052 invalid_fld:
542b1444 3053 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 3054 /* "Invalid field in cdb" */
3055 return 1;
b095518e
JG		 3056}
3057
18f0f978
CH		 3058static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3059{
3060 struct ata_taskfile *tf = &qc->tf;
3061 struct scsi_cmnd *scmd = qc->scsicmd;
3062 struct ata_device *dev = qc->dev;
3063 const u8 *cdb = scmd->cmnd;
3064 u64 block;
3065 u32 n_block;
3066 u32 size;
3067 void *buf;
3068
3069 /* we may not issue DMA commands if no DMA mode is set */
3070 if (unlikely(!dev->dma_mode))
3071 goto invalid_fld;
3072
3073 if (unlikely(scmd->cmd_len < 16))
3074 goto invalid_fld;
3075 scsi_16_lba_len(cdb, &block, &n_block);
3076
3077 /* for now we only support WRITE SAME with the unmap bit set */
3078 if (unlikely(!(cdb[1] & 0x8)))
3079 goto invalid_fld;
3080
3081 /*
3082 * WRITE SAME always has a sector sized buffer as payload, this
3083 * should never be a multiple entry S/G list.
3084 */
3085 if (!scsi_sg_count(scmd))
3086 goto invalid_fld;
3087
3088 buf = page_address(sg_page(scsi_sglist(scmd)));
d0634c4a 3089 size = ata_set_lba_range_entries(buf, 512, block, n_block);
18f0f978
CH		 3090
3091 tf->protocol = ATA_PROT_DMA;
3092 tf->hob_feature = 0;
3093 tf->feature = ATA_DSM_TRIM;
3094 tf->hob_nsect = (size / 512) >> 8;
3095 tf->nsect = size / 512;
3096 tf->command = ATA_CMD_DSM;
3097 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3098 ATA_TFLAG_WRITE;
3099
3100 ata_qc_set_pc_nbytes(qc);
3101
3102 return 0;
3103
3104 invalid_fld:
3105 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3106 /* "Invalid field in cdb" */
3107 return 1;
3108}
3109
1b26d29c
PB		 3110/**
3111 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3112 * @qc: Storage for translated ATA taskfile
3113 * @buf: input buffer
3114 * @len: number of valid bytes in the input buffer
3115 *
3116 * Prepare a taskfile to modify caching information for the device.
3117 *
3118 * LOCKING:
3119 * None.
3120 */
3121static int ata_mselect_caching(struct ata_queued_cmd *qc,
3122 const u8 *buf, int len)
3123{
3124 struct ata_taskfile *tf = &qc->tf;
3125 struct ata_device *dev = qc->dev;
3126 char mpage[CACHE_MPAGE_LEN];
3127 u8 wce;
3128
3129 /*
3130 * The first two bytes of def_cache_mpage are a header, so offsets
3131 * in mpage are off by 2 compared to buf. Same for len.
3132 */
3133
3134 if (len != CACHE_MPAGE_LEN - 2)
3135 return -EINVAL;
3136
3137 wce = buf[0] & (1 << 2);
3138
3139 /*
3140 * Check that read-only bits are not modified.
3141 */
3142 ata_msense_caching(dev->id, mpage, false);
3143 mpage[2] &= ~(1 << 2);
3144 mpage[2] |= wce;
3145 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3146 return -EINVAL;
3147
3148 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3149 tf->protocol = ATA_PROT_NODATA;
3150 tf->nsect = 0;
3151 tf->command = ATA_CMD_SET_FEATURES;
3152 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3153 return 0;
3154}
3155
3156/**
3157 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3158 * @qc: Storage for translated ATA taskfile
3159 *
3160 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3161 * Assume this is invoked for direct access devices (e.g. disks) only.
3162 * There should be no block descriptor for other device types.
3163 *
3164 * LOCKING:
3165 * spin_lock_irqsave(host lock)
3166 */
3167static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3168{
3169 struct scsi_cmnd *scmd = qc->scsicmd;
3170 const u8 *cdb = scmd->cmnd;
3171 const u8 *p;
3172 u8 pg, spg;
3173 unsigned six_byte, pg_len, hdr_len, bd_len;
3174 int len;
3175
3176 VPRINTK("ENTER\n");
3177
3178 six_byte = (cdb[0] == MODE_SELECT);
3179 if (six_byte) {
3180 if (scmd->cmd_len < 5)
3181 goto invalid_fld;
3182
3183 len = cdb[4];
3184 hdr_len = 4;
3185 } else {
3186 if (scmd->cmd_len < 9)
3187 goto invalid_fld;
3188
3189 len = (cdb[7] << 8) + cdb[8];
3190 hdr_len = 8;
3191 }
3192
3193 /* We only support PF=1, SP=0. */
3194 if ((cdb[1] & 0x11) != 0x10)
3195 goto invalid_fld;
3196
3197 /* Test early for possible overrun. */
3198 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3199 goto invalid_param_len;
3200
3201 p = page_address(sg_page(scsi_sglist(scmd)));
3202
3203 /* Move past header and block descriptors. */
3204 if (len < hdr_len)
3205 goto invalid_param_len;
3206
3207 if (six_byte)
3208 bd_len = p[3];
3209 else
3210 bd_len = (p[6] << 8) + p[7];
3211
3212 len -= hdr_len;
3213 p += hdr_len;
3214 if (len < bd_len)
3215 goto invalid_param_len;
3216 if (bd_len != 0 && bd_len != 8)
3217 goto invalid_param;
3218
3219 len -= bd_len;
3220 p += bd_len;
3221 if (len == 0)
3222 goto skip;
3223
3224 /* Parse both possible formats for the mode page headers. */
3225 pg = p[0] & 0x3f;
3226 if (p[0] & 0x40) {
3227 if (len < 4)
3228 goto invalid_param_len;
3229
3230 spg = p[1];
3231 pg_len = (p[2] << 8) | p[3];
3232 p += 4;
3233 len -= 4;
3234 } else {
3235 if (len < 2)
3236 goto invalid_param_len;
3237
3238 spg = 0;
3239 pg_len = p[1];
3240 p += 2;
3241 len -= 2;
3242 }
3243
3244 /*
3245 * No mode subpages supported (yet) but asking for _all_
3246 * subpages may be valid
3247 */
3248 if (spg && (spg != ALL_SUB_MPAGES))
3249 goto invalid_param;
3250 if (pg_len > len)
3251 goto invalid_param_len;
3252
3253 switch (pg) {
3254 case CACHE_MPAGE:
3255 if (ata_mselect_caching(qc, p, pg_len) < 0)
3256 goto invalid_param;
3257 break;
3258
3259 default: /* invalid page code */
3260 goto invalid_param;
3261 }
3262
3263 /*
3264 * Only one page has changeable data, so we only support setting one
3265 * page at a time.
3266 */
3267 if (len > pg_len)
3268 goto invalid_param;
3269
3270 return 0;
3271
3272 invalid_fld:
3273 /* "Invalid field in CDB" */
3274 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3275 return 1;
3276
3277 invalid_param:
3278 /* "Invalid field in parameter list" */
3279 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3280 return 1;
3281
3282 invalid_param_len:
3283 /* "Parameter list length error" */
3284 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3285 return 1;
3286
3287 skip:
3288 scmd->result = SAM_STAT_GOOD;
3289 return 1;
3290}
3291
1da177e4
LT		 3292/**
3293 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3294 * @dev: ATA device
3295 * @cmd: SCSI command opcode to consider
3296 *
3297 * Look up the SCSI command given, and determine whether the
3298 * SCSI command is to be translated or simulated.
3299 *
3300 * RETURNS:
3301 * Pointer to translation function if possible, %NULL if not.
3302 */
3303
3304static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3305{
3306 switch (cmd) {
3307 case READ_6:
3308 case READ_10:
3309 case READ_16:
3310
3311 case WRITE_6:
3312 case WRITE_10:
3313 case WRITE_16:
3314 return ata_scsi_rw_xlat;
3315
0cdd6eb7 3316 case WRITE_SAME_16:
18f0f978
CH		 3317 return ata_scsi_write_same_xlat;
3318
1da177e4
LT		 3319 case SYNCHRONIZE_CACHE:
3320 if (ata_try_flush_cache(dev))
3321 return ata_scsi_flush_xlat;
3322 break;
3323
3324 case VERIFY:
3325 case VERIFY_16:
3326 return ata_scsi_verify_xlat;
b095518e
JG		 3327
3328 case ATA_12:
3329 case ATA_16:
3330 return ata_scsi_pass_thru;
da61396d 3331
1b26d29c
PB		 3332 case MODE_SELECT:
3333 case MODE_SELECT_10:
3334 return ata_scsi_mode_select_xlat;
3335 break;
3336
972dcafb
DG		 3337 case START_STOP:
3338 return ata_scsi_start_stop_xlat;
1da177e4
LT		 3339 }
3340
3341 return NULL;
3342}
3343
3344/**
3345 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3346 * @ap: ATA port to which the command was being sent
3347 * @cmd: SCSI command to dump
3348 *
3349 * Prints the contents of a SCSI command via printk().
3350 */
3351
3352static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3353 struct scsi_cmnd *cmd)
3354{
3355#ifdef ATA_DEBUG
3356 struct scsi_device *scsidev = cmd->device;
3357 u8 *scsicmd = cmd->cmnd;
3358
3359 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 3360 ap->print_id,
1da177e4
LT		 3361 scsidev->channel, scsidev->id, scsidev->lun,
3362 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3363 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3364 scsicmd[8]);
3365#endif
3366}
3367
542b1444 3368static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 3369 struct ata_device *dev)
eb3f0f9c 3370{
baf4fdfa
ML		 3371 u8 scsi_op = scmd->cmnd[0];
3372 ata_xlat_func_t xlat_func;
2115ea94
TH		 3373 int rc = 0;
3374
eb3f0f9c 3375 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 3376 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3377 goto bad_cdb_len;
eb3f0f9c 3378
baf4fdfa
ML		 3379 xlat_func = ata_get_xlat_func(dev, scsi_op);
3380 } else {
3381 if (unlikely(!scmd->cmd_len))
3382 goto bad_cdb_len;
3383
3384 xlat_func = NULL;
3385 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3386 /* relay SCSI command to ATAPI device */
607126c2
ML		 3387 int len = COMMAND_SIZE(scsi_op);
3388 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3389 goto bad_cdb_len;
3390
3391 xlat_func = atapi_xlat;
3392 } else {
3393 /* ATA_16 passthru, treat as an ATA command */
3394 if (unlikely(scmd->cmd_len > 16))
3395 goto bad_cdb_len;
3396
3397 xlat_func = ata_get_xlat_func(dev, scsi_op);
3398 }
3399 }
3400
3401 if (xlat_func)
b27dcfb0 3402 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 3403 else
b27dcfb0 3404 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 3405
3406 return rc;
baf4fdfa
ML		 3407
3408 bad_cdb_len:
3409 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3410 scmd->cmd_len, scsi_op, dev->cdb_len);
3411 scmd->result = DID_ERROR << 16;
b27dcfb0 3412 scmd->scsi_done(scmd);
baf4fdfa 3413 return 0;
eb3f0f9c
BK		 3414}
3415
1da177e4
LT		 3416/**
3417 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 3418 * @shost: SCSI host of command to be sent
1da177e4 3419 * @cmd: SCSI command to be sent
1da177e4
LT		 3420 *
3421 * In some cases, this function translates SCSI commands into
3422 * ATA taskfiles, and queues the taskfiles to be sent to
3423 * hardware. In other cases, this function simulates a
3424 * SCSI device by evaluating and responding to certain
3425 * SCSI commands. This creates the overall effect of
3426 * ATA and ATAPI devices appearing as SCSI devices.
3427 *
3428 * LOCKING:
23e701e6 3429 * ATA host lock
1da177e4
LT		 3430 *
3431 * RETURNS:
2115ea94
TH		 3432 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3433 * 0 otherwise.
1da177e4 3434 */
23e701e6 3435int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 3436{
3437 struct ata_port *ap;
3438 struct ata_device *dev;
3439 struct scsi_device *scsidev = cmd->device;
2115ea94 3440 int rc = 0;
23e701e6 3441 unsigned long irq_flags;
1da177e4 3442
35bb94b1 3443 ap = ata_shost_to_port(shost);
005a5a06 3444
23e701e6 3445 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 3446
3447 ata_scsi_dump_cdb(ap, cmd);
3448
3449 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3450 if (likely(dev))
b27dcfb0 3451 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 3452 else {
1da177e4 3453 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 3454 cmd->scsi_done(cmd);
1da177e4
LT		 3455 }
3456
23e701e6
JG		 3457 spin_unlock_irqrestore(ap->lock, irq_flags);
3458
2115ea94 3459 return rc;
1da177e4
LT		 3460}
3461
3462/**
3463 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3464 * @dev: the target device
1da177e4 3465 * @cmd: SCSI command being sent to device.
1da177e4
LT		 3466 *
3467 * Interprets and directly executes a select list of SCSI commands
3468 * that can be handled internally.
3469 *
3470 * LOCKING:
cca3974e 3471 * spin_lock_irqsave(host lock)
1da177e4
LT		 3472 */
3473
b27dcfb0 3474void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 3475{
3476 struct ata_scsi_args args;
057ace5e 3477 const u8 *scsicmd = cmd->cmnd;
45394145 3478 u8 tmp8;
1da177e4 3479
9a3dccc4
TH		 3480 args.dev = dev;
3481 args.id = dev->id;
1da177e4 3482 args.cmd = cmd;
b27dcfb0 3483 args.done = cmd->scsi_done;
1da177e4
LT		 3484
3485 switch(scsicmd[0]) {
2dcb407e
JG		 3486 /* TODO: worth improving? */
3487 case FORMAT_UNIT:
b27dcfb0 3488 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3489 break;
3490
3491 case INQUIRY:
3492 if (scsicmd[1] & 2) /* is CmdDt set? */
b27dcfb0 3493 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3494 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3495 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3496 else switch (scsicmd[2]) {
3497 case 0x00:
3498 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3499 break;
2dcb407e
JG		 3500 case 0x80:
3501 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3502 break;
2dcb407e
JG		 3503 case 0x83:
3504 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3505 break;
2dcb407e
JG		 3506 case 0x89:
3507 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3508 break;
18f0f978
CH		 3509 case 0xb0:
3510 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3511 break;
1e9dbc92
MW		 3512 case 0xb1:
3513 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3514 break;
02e0a604
MP		 3515 case 0xb2:
3516 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3517 break;
2dcb407e 3518 default:
b27dcfb0 3519 ata_scsi_invalid_field(cmd);
1da177e4 3520 break;
2dcb407e
JG		 3521 }
3522 break;
3523
3524 case MODE_SENSE:
3525 case MODE_SENSE_10:
3526 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3527 break;
3528
2dcb407e
JG		 3529 case READ_CAPACITY:
3530 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3531 break;
3532
3533 case SERVICE_ACTION_IN:
3534 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3535 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 3536 else
b27dcfb0 3537 ata_scsi_invalid_field(cmd);
2dcb407e 3538 break;
1da177e4 3539
2dcb407e
JG		 3540 case REPORT_LUNS:
3541 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3542 break;
1da177e4 3543
2dcb407e
JG		 3544 case REQUEST_SENSE:
3545 ata_scsi_set_sense(cmd, 0, 0, 0);
3546 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 3547 cmd->scsi_done(cmd);
2dcb407e 3548 break;
1da177e4 3549
2dcb407e
JG		 3550 /* if we reach this, then writeback caching is disabled,
3551 * turning this into a no-op.
3552 */
3553 case SYNCHRONIZE_CACHE:
3554 /* fall through */
3555
3556 /* no-op's, complete with success */
3557 case REZERO_UNIT:
3558 case SEEK_6:
3559 case SEEK_10:
3560 case TEST_UNIT_READY:
3561 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3562 break;
45394145 3563
2dcb407e
JG		 3564 case SEND_DIAGNOSTIC:
3565 tmp8 = scsicmd[1] & ~(1 << 3);
3566 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3567 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 3568 else
b27dcfb0 3569 ata_scsi_invalid_field(cmd);
2dcb407e 3570 break;
1da177e4 3571
2dcb407e
JG		 3572 /* all other commands */
3573 default:
3574 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3575 /* "Invalid command operation code" */
b27dcfb0 3576 cmd->scsi_done(cmd);
2dcb407e 3577 break;
1da177e4
LT		 3578 }
3579}
3580
f3187195
TH		 3581int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3582{
3583 int i, rc;
3584
3585 for (i = 0; i < host->n_ports; i++) {
3586 struct ata_port *ap = host->ports[i];
3587 struct Scsi_Host *shost;
3588
3589 rc = -ENOMEM;
3590 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3591 if (!shost)
3592 goto err_alloc;
3593
9ee4f393 3594 shost->eh_noresume = 1;
f3187195
TH		 3595 *(struct ata_port **)&shost->hostdata[0] = ap;
3596 ap->scsi_host = shost;
3597
d9027470 3598 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 3599 shost->unique_id = ap->print_id;
3600 shost->max_id = 16;
3601 shost->max_lun = 1;
3602 shost->max_channel = 1;
3603 shost->max_cmd_len = 16;
3604
31cc23b3
TH		 3605 /* Schedule policy is determined by ->qc_defer()
3606 * callback and it needs to see every deferred qc.
3607 * Set host_blocked to 1 to prevent SCSI midlayer from
3608 * automatically deferring requests.
3609 */
3610 shost->max_host_blocked = 1;
3611
f8fc75dc
LM		 3612 rc = scsi_add_host_with_dma(ap->scsi_host,
3613 &ap->tdev, ap->host->dev);
f3187195
TH		 3614 if (rc)
3615 goto err_add;
3616 }
3617
3618 return 0;
3619
3620 err_add:
3621 scsi_host_put(host->ports[i]->scsi_host);
3622 err_alloc:
3623 while (--i >= 0) {
3624 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3625
3626 scsi_remove_host(shost);
3627 scsi_host_put(shost);
3628 }
3629 return rc;
3630}
3631
1ae46317 3632void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3633{
1ae46317
TH		 3634 int tries = 5;
3635 struct ata_device *last_failed_dev = NULL;
41bda9c9 3636 struct ata_link *link;
1ae46317 3637 struct ata_device *dev;
644dd0cc 3638
1ae46317 3639 repeat:
1eca4365
TH		 3640 ata_for_each_link(link, ap, EDGE) {
3641 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3642 struct scsi_device *sdev;
3643 int channel = 0, id = 0;
3edebac4 3644
1eca4365 3645 if (dev->sdev)
41bda9c9 3646 continue;
3f19ee8c 3647
41bda9c9
TH		 3648 if (ata_is_host_link(link))
3649 id = dev->devno;
3650 else
3651 channel = link->pmp;
3652
3653 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3654 NULL);
3655 if (!IS_ERR(sdev)) {
3656 dev->sdev = sdev;
3657 scsi_device_put(sdev);
3bd46600 3658 ata_acpi_bind(dev);
295124dc
GG		 3659 } else {
3660 dev->sdev = NULL;
41bda9c9 3661 }
3edebac4 3662 }
3f19ee8c 3663 }
1ae46317
TH		 3664
3665 /* If we scanned while EH was in progress or allocation
3666 * failure occurred, scan would have failed silently. Check
3667 * whether all devices are attached.
3668 */
1eca4365
TH		 3669 ata_for_each_link(link, ap, EDGE) {
3670 ata_for_each_dev(dev, link, ENABLED) {
3671 if (!dev->sdev)
41bda9c9
TH		 3672 goto exit_loop;
3673 }
1ae46317 3674 }
41bda9c9
TH		 3675 exit_loop:
3676 if (!link)
1ae46317
TH		 3677 return;
3678
3679 /* we're missing some SCSI devices */
3680 if (sync) {
3681 /* If caller requested synchrnous scan && we've made
3682 * any progress, sleep briefly and repeat.
3683 */
3684 if (dev != last_failed_dev) {
3685 msleep(100);
3686 last_failed_dev = dev;
3687 goto repeat;
3688 }
3689
3690 /* We might be failing to detect boot device, give it
3691 * a few more chances.
3692 */
3693 if (--tries) {
3694 msleep(100);
3695 goto repeat;
3696 }
3697
a9a79dfe
JP		 3698 ata_port_err(ap,
3699 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 3700 }
3701
ad72cf98 3702 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 3703 round_jiffies_relative(HZ));
644dd0cc 3704}
0ea035a3
TH		 3705
3706/**
3707 * ata_scsi_offline_dev - offline attached SCSI device
3708 * @dev: ATA device to offline attached SCSI device for
3709 *
3710 * This function is called from ata_eh_hotplug() and responsible
3711 * for taking the SCSI device attached to @dev offline. This
cca3974e 3712 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3713 * against clearing.
3714 *
3715 * LOCKING:
cca3974e 3716 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3717 *
3718 * RETURNS:
3719 * 1 if attached SCSI device exists, 0 otherwise.
3720 */
3721int ata_scsi_offline_dev(struct ata_device *dev)
3722{
3723 if (dev->sdev) {
3724 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3725 return 1;
3726 }
3727 return 0;
3728}
580b2102
TH		 3729
3730/**
3731 * ata_scsi_remove_dev - remove attached SCSI device
3732 * @dev: ATA device to remove attached SCSI device for
3733 *
3734 * This function is called from ata_eh_scsi_hotplug() and
3735 * responsible for removing the SCSI device attached to @dev.
3736 *
3737 * LOCKING:
3738 * Kernel thread context (may sleep).
3739 */
3740static void ata_scsi_remove_dev(struct ata_device *dev)
3741{
9af5c9c9 3742 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3743 struct scsi_device *sdev;
3744 unsigned long flags;
3745
3746 /* Alas, we need to grab scan_mutex to ensure SCSI device
3747 * state doesn't change underneath us and thus
3748 * scsi_device_get() always succeeds. The mutex locking can
3749 * be removed if there is __scsi_device_get() interface which
3750 * increments reference counts regardless of device state.
3751 */
cca3974e 3752 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3753 spin_lock_irqsave(ap->lock, flags);
580b2102 3754
3bd46600
LM		 3755 ata_acpi_unbind(dev);
3756
cca3974e 3757 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3758 sdev = dev->sdev;
3759 dev->sdev = NULL;
3760
3761 if (sdev) {
3762 /* If user initiated unplug races with us, sdev can go
cca3974e 3763 * away underneath us after the host lock and
580b2102
TH		 3764 * scan_mutex are released. Hold onto it.
3765 */
3766 if (scsi_device_get(sdev) == 0) {
3767 /* The following ensures the attached sdev is
3768 * offline on return from ata_scsi_offline_dev()
3769 * regardless it wins or loses the race
3770 * against this function.
3771 */
3772 scsi_device_set_state(sdev, SDEV_OFFLINE);
3773 } else {
3774 WARN_ON(1);
3775 sdev = NULL;
3776 }
3777 }
3778
ba6a1308 3779 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3780 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3781
3782 if (sdev) {
a9a79dfe
JP		 3783 ata_dev_info(dev, "detaching (SCSI %s)\n",
3784 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3785
3786 scsi_remove_device(sdev);
3787 scsi_device_put(sdev);
3788 }
3789}
3790
41bda9c9
TH		 3791static void ata_scsi_handle_link_detach(struct ata_link *link)
3792{
3793 struct ata_port *ap = link->ap;
3794 struct ata_device *dev;
3795
1eca4365 3796 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3797 unsigned long flags;
3798
3799 if (!(dev->flags & ATA_DFLAG_DETACHED))
3800 continue;
3801
3802 spin_lock_irqsave(ap->lock, flags);
3803 dev->flags &= ~ATA_DFLAG_DETACHED;
3804 spin_unlock_irqrestore(ap->lock, flags);
3805
3806 ata_scsi_remove_dev(dev);
3807 }
3808}
3809
2f294968
KCA		 3810/**
3811 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3812 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3813 *
3814 * Tell the block layer to send a media change notification
3815 * event.
3816 *
3817 * LOCKING:
854c73a2 3818 * spin_lock_irqsave(host lock)
2f294968 3819 */
854c73a2 3820void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3821{
854c73a2 3822 if (dev->sdev)
f26792d5
JG		 3823 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3824 GFP_ATOMIC);
2f294968 3825}
2f294968 3826
580b2102
TH		 3827/**
3828 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3829 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3830 *
3831 * Perform SCSI part of hotplug. It's executed from a separate
3832 * workqueue after EH completes. This is necessary because SCSI
3833 * hot plugging requires working EH and hot unplugging is
3834 * synchronized with hot plugging with a mutex.
3835 *
3836 * LOCKING:
3837 * Kernel thread context (may sleep).
3838 */
65f27f38 3839void ata_scsi_hotplug(struct work_struct *work)
580b2102 3840{
65f27f38
DH		 3841 struct ata_port *ap =
3842 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3843 int i;
580b2102 3844
b51e9e5d 3845 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3846 DPRINTK("ENTER/EXIT - unloading\n");
3847 return;
3848 }
3849
3850 DPRINTK("ENTER\n");
ad72cf98 3851 mutex_lock(&ap->scsi_scan_mutex);
580b2102 3852
41bda9c9
TH		 3853 /* Unplug detached devices. We cannot use link iterator here
3854 * because PMP links have to be scanned even if PMP is
3855 * currently not attached. Iterate manually.
3856 */
3857 ata_scsi_handle_link_detach(&ap->link);
3858 if (ap->pmp_link)
3859 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3860 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3861
3862 /* scan for new ones */
1ae46317 3863 ata_scsi_scan_host(ap, 0);
580b2102 3864
ad72cf98 3865 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 3866 DPRINTK("EXIT\n");
3867}
83c47bcb
TH		 3868
3869/**
3870 * ata_scsi_user_scan - indication for user-initiated bus scan
3871 * @shost: SCSI host to scan
3872 * @channel: Channel to scan
3873 * @id: ID to scan
3874 * @lun: LUN to scan
3875 *
3876 * This function is called when user explicitly requests bus
3877 * scan. Set probe pending flag and invoke EH.
3878 *
3879 * LOCKING:
3880 * SCSI layer (we don't care)
3881 *
3882 * RETURNS:
3883 * Zero.
3884 */
d9027470
GG		 3885int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3886 unsigned int id, unsigned int lun)
83c47bcb
TH		 3887{
3888 struct ata_port *ap = ata_shost_to_port(shost);
3889 unsigned long flags;
41bda9c9 3890 int devno, rc = 0;
83c47bcb
TH		 3891
3892 if (!ap->ops->error_handler)
3893 return -EOPNOTSUPP;
3894
41bda9c9 3895 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3896 return -EINVAL;
3897
071f44b1 3898 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3899 if (channel != SCAN_WILD_CARD && channel)
3900 return -EINVAL;
3901 devno = id;
3902 } else {
3903 if (id != SCAN_WILD_CARD && id)
3904 return -EINVAL;
3905 devno = channel;
3906 }
3907
ba6a1308 3908 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3909
41bda9c9
TH		 3910 if (devno == SCAN_WILD_CARD) {
3911 struct ata_link *link;
3912
1eca4365 3913 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3914 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3915 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3916 ehi->action |= ATA_EH_RESET;
41bda9c9 3917 }
83c47bcb 3918 } else {
41bda9c9 3919 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3920
3921 if (dev) {
41bda9c9 3922 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3923 ehi->probe_mask |= 1 << dev->devno;
cf480626 3924 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3925 } else
3926 rc = -EINVAL;
3927 }
3928
309afcb5 3929 if (rc == 0) {
83c47bcb 3930 ata_port_schedule_eh(ap);
309afcb5
TH		 3931 spin_unlock_irqrestore(ap->lock, flags);
3932 ata_port_wait_eh(ap);
3933 } else
3934 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3935
3936 return rc;
3937}
3057ac3c 3938
3939/**
d0171269 3940 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3941 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3942 *
d0171269 3943 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 3944 * libata need to propagate the changes to SCSI layer.
3057ac3c 3945 *
d0171269
TH		 3946 * LOCKING:
3947 * Kernel thread context (may sleep).
3057ac3c 3948 */
65f27f38 3949void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3950{
65f27f38
DH		 3951 struct ata_port *ap =
3952 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3953 struct ata_link *link;
f58229f8 3954 struct ata_device *dev;
f84e7e41 3955 unsigned long flags;
3057ac3c 3956
ad72cf98 3957 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 3958 spin_lock_irqsave(ap->lock, flags);
3959
1eca4365
TH		 3960 ata_for_each_link(link, ap, EDGE) {
3961 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3962 struct scsi_device *sdev = dev->sdev;
3057ac3c 3963
1eca4365 3964 if (!sdev)
41bda9c9
TH		 3965 continue;
3966 if (scsi_device_get(sdev))
3967 continue;
f84e7e41 3968
41bda9c9
TH		 3969 spin_unlock_irqrestore(ap->lock, flags);
3970 scsi_rescan_device(&(sdev->sdev_gendev));
3971 scsi_device_put(sdev);
3972 spin_lock_irqsave(ap->lock, flags);
3973 }
3057ac3c 3974 }
f84e7e41
TH		 3975
3976 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 3977 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 3978}
80289167
BK		 3979
3980/**
3981 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3982 * @host: ATA host container for all SAS ports
80289167 3983 * @port_info: Information from low-level host driver
cca3974e 3984 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3985 *
3986 * LOCKING:
3987 * PCI/etc. bus probe sem.
3988 *
3989 * RETURNS:
3990 * ata_port pointer on success / NULL on failure.
3991 */
3992
cca3974e 3993struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3994 struct ata_port_info *port_info,
cca3974e 3995 struct Scsi_Host *shost)
80289167 3996{
f3187195 3997 struct ata_port *ap;
80289167 3998
f3187195 3999 ap = ata_port_alloc(host);
80289167
BK		 4000 if (!ap)
4001 return NULL;
4002
f3187195 4003 ap->port_no = 0;
a29b5dad 4004 ap->lock = &host->lock;
f3187195
TH		 4005 ap->pio_mask = port_info->pio_mask;
4006 ap->mwdma_mask = port_info->mwdma_mask;
4007 ap->udma_mask = port_info->udma_mask;
4008 ap->flags |= port_info->flags;
4009 ap->ops = port_info->port_ops;
4010 ap->cbl = ATA_CBL_SATA;
4011
80289167
BK		 4012 return ap;
4013}
4014EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4015
4016/**
4017 * ata_sas_port_start - Set port up for dma.
4018 * @ap: Port to initialize
4019 *
4020 * Called just after data structures for each port are
dde20207 4021 * initialized.
80289167
BK		 4022 *
4023 * May be used as the port_start() entry in ata_port_operations.
4024 *
4025 * LOCKING:
4026 * Inherited from caller.
4027 */
4028int ata_sas_port_start(struct ata_port *ap)
4029{
3f1e046a
NA		 4030 /*
4031 * the port is marked as frozen at allocation time, but if we don't
4032 * have new eh, we won't thaw it
4033 */
4034 if (!ap->ops->error_handler)
4035 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 4036 return 0;
80289167
BK		 4037}
4038EXPORT_SYMBOL_GPL(ata_sas_port_start);
4039
4040/**
4041 * ata_port_stop - Undo ata_sas_port_start()
4042 * @ap: Port to shut down
4043 *
80289167
BK		 4044 * May be used as the port_stop() entry in ata_port_operations.
4045 *
4046 * LOCKING:
4047 * Inherited from caller.
4048 */
4049
4050void ata_sas_port_stop(struct ata_port *ap)
4051{
80289167
BK		 4052}
4053EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4054
b2024459
DW		 4055/**
4056 * ata_sas_async_probe - simply schedule probing and return
4057 * @ap: Port to probe
4058 *
4059 * For batch scheduling of probe for sas attached ata devices, assumes
4060 * the port has already been through ata_sas_port_init()
4061 */
4062void ata_sas_async_probe(struct ata_port *ap)
9508a66f 4063{
b2024459
DW		 4064 __ata_port_probe(ap);
4065}
4066EXPORT_SYMBOL_GPL(ata_sas_async_probe);
9508a66f 4067
b2024459
DW		 4068int ata_sas_sync_probe(struct ata_port *ap)
4069{
4070 return ata_port_probe(ap);
9508a66f 4071}
b2024459
DW		 4072EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4073
9508a66f 4074
80289167
BK		 4075/**
4076 * ata_sas_port_init - Initialize a SATA device
4077 * @ap: SATA port to initialize
4078 *
4079 * LOCKING:
4080 * PCI/etc. bus probe sem.
4081 *
4082 * RETURNS:
4083 * Zero on success, non-zero on error.
4084 */
4085
4086int ata_sas_port_init(struct ata_port *ap)
4087{
4088 int rc = ap->ops->port_start(ap);
4089
b2024459
DW		 4090 if (rc)
4091 return rc;
4092 ap->print_id = atomic_inc_return(&ata_print_id);
4093 return 0;
80289167
BK		 4094}
4095EXPORT_SYMBOL_GPL(ata_sas_port_init);
4096
4097/**
4098 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4099 * @ap: SATA port to destroy
4100 *
4101 */
4102
4103void ata_sas_port_destroy(struct ata_port *ap)
4104{
f0d36efd
TH		 4105 if (ap->ops->port_stop)
4106 ap->ops->port_stop(ap);
80289167
BK		 4107 kfree(ap);
4108}
4109EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4110
4111/**
4112 * ata_sas_slave_configure - Default slave_config routine for libata devices
4113 * @sdev: SCSI device to configure
4114 * @ap: ATA port to which SCSI device is attached
4115 *
4116 * RETURNS:
4117 * Zero.
4118 */
4119
4120int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4121{
4122 ata_scsi_sdev_config(sdev);
9af5c9c9 4123 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 4124 return 0;
4125}
4126EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4127
4128/**
4129 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4130 * @cmd: SCSI command to be sent
80289167
BK		 4131 * @ap: ATA port to which the command is being sent
4132 *
4133 * RETURNS:
08475a19
BK		 4134 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4135 * 0 otherwise.
80289167
BK		 4136 */
4137
b27dcfb0 4138int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 4139{
08475a19
BK		 4140 int rc = 0;
4141
80289167
BK		 4142 ata_scsi_dump_cdb(ap, cmd);
4143
2486fa56 4144 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 4145 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 4146 else {
4147 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 4148 cmd->scsi_done(cmd);
80289167 4149 }
08475a19 4150 return rc;
80289167
BK		 4151}
4152EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux 6.x block layer and io_uring tree(s)