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Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
[deliverable/linux.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
5a0e3ad6 36#include <linux/slab.h>
1da177e4
LT		 37#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
38789fda 40#include <linux/export.h>
1da177e4 41#include <scsi/scsi.h>
1da177e4 42#include <scsi/scsi_host.h>
beb40487 43#include <scsi/scsi_cmnd.h>
85837ebd 44#include <scsi/scsi_eh.h>
005a5a06 45#include <scsi/scsi_device.h>
a6e6ce8e 46#include <scsi/scsi_tcq.h>
30afc84c 47#include <scsi/scsi_transport.h>
1da177e4 48#include <linux/libata.h>
b095518e 49#include <linux/hdreg.h>
2dcb407e 50#include <linux/uaccess.h>
2a6e58d2 51#include <linux/suspend.h>
18f0f978 52#include <asm/unaligned.h>
1da177e4
LT		 53
54#include "libata.h"
d9027470 55#include "libata-transport.h"
1da177e4 56
87340e98
TH		 57#define ATA_SCSI_RBUF_SIZE 4096
58
59static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 61
ad706991 62typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 63
2dcb407e 64static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 65 const struct scsi_device *scsidev);
2dcb407e 66static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 67 const struct scsi_device *scsidev);
1da177e4 68
00ac37f5
DG		 69#define RW_RECOVERY_MPAGE 0x1
70#define RW_RECOVERY_MPAGE_LEN 12
71#define CACHE_MPAGE 0x8
72#define CACHE_MPAGE_LEN 20
73#define CONTROL_MPAGE 0xa
74#define CONTROL_MPAGE_LEN 12
75#define ALL_MPAGES 0x3f
76#define ALL_SUB_MPAGES 0xff
77
78
24f75686 79static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 80 RW_RECOVERY_MPAGE,
81 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 82 (1 << 7), /* AWRE */
00ac37f5
DG		 83 0, /* read retry count */
84 0, 0, 0, 0,
85 0, /* write retry count */
86 0, 0, 0
87};
88
89static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
90 CACHE_MPAGE,
91 CACHE_MPAGE_LEN - 2,
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0
96};
97
98static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE,
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
105};
106
c93b263e
TH		 107static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
ca77329f
KCA		 112};
113
c93b263e
TH		 114static ssize_t ata_scsi_lpm_store(struct device *dev,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
ca77329f 117{
ee959b00 118 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 119 struct ata_port *ap = ata_shost_to_port(shost);
c93b263e 120 enum ata_lpm_policy policy;
6b7ae954 121 unsigned long flags;
c93b263e
TH		 122
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy = ATA_LPM_MAX_POWER;
125 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
126 const char *name = ata_lpm_policy_names[policy];
127
128 if (strncmp(name, buf, strlen(name)) == 0)
ca77329f 129 break;
ca77329f 130 }
c93b263e 131 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 132 return -EINVAL;
133
6b7ae954
TH		 134 spin_lock_irqsave(ap->lock, flags);
135 ap->target_lpm_policy = policy;
136 ata_port_schedule_eh(ap);
137 spin_unlock_irqrestore(ap->lock, flags);
138
ca77329f
KCA		 139 return count;
140}
141
c93b263e
TH		 142static ssize_t ata_scsi_lpm_show(struct device *dev,
143 struct device_attribute *attr, char *buf)
ca77329f 144{
ee959b00 145 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 146 struct ata_port *ap = ata_shost_to_port(shost);
ca77329f 147
6b7ae954 148 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 149 return -EINVAL;
150
c93b263e 151 return snprintf(buf, PAGE_SIZE, "%s\n",
6b7ae954 152 ata_lpm_policy_names[ap->target_lpm_policy]);
ca77329f 153}
ee959b00 154DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
c93b263e 155 ata_scsi_lpm_show, ata_scsi_lpm_store);
ee959b00 156EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 157
45fabbb7
EO		 158static ssize_t ata_scsi_park_show(struct device *device,
159 struct device_attribute *attr, char *buf)
160{
161 struct scsi_device *sdev = to_scsi_device(device);
162 struct ata_port *ap;
163 struct ata_link *link;
164 struct ata_device *dev;
a464189d 165 unsigned long flags, now;
45fabbb7
EO		 166 unsigned int uninitialized_var(msecs);
167 int rc = 0;
168
169 ap = ata_shost_to_port(sdev->host);
170
171 spin_lock_irqsave(ap->lock, flags);
172 dev = ata_scsi_find_dev(ap, sdev);
173 if (!dev) {
174 rc = -ENODEV;
175 goto unlock;
176 }
177 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
178 rc = -EOPNOTSUPP;
179 goto unlock;
180 }
181
182 link = dev->link;
a464189d 183 now = jiffies;
45fabbb7
EO		 184 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
185 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 186 time_after(dev->unpark_deadline, now))
187 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 188 else
189 msecs = 0;
190
191unlock:
192 spin_unlock_irq(ap->lock);
193
194 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
195}
196
197static ssize_t ata_scsi_park_store(struct device *device,
198 struct device_attribute *attr,
199 const char *buf, size_t len)
200{
201 struct scsi_device *sdev = to_scsi_device(device);
202 struct ata_port *ap;
203 struct ata_device *dev;
204 long int input;
205 unsigned long flags;
206 int rc;
207
208 rc = strict_strtol(buf, 10, &input);
209 if (rc || input < -2)
210 return -EINVAL;
211 if (input > ATA_TMOUT_MAX_PARK) {
212 rc = -EOVERFLOW;
213 input = ATA_TMOUT_MAX_PARK;
214 }
215
216 ap = ata_shost_to_port(sdev->host);
217
218 spin_lock_irqsave(ap->lock, flags);
219 dev = ata_scsi_find_dev(ap, sdev);
220 if (unlikely(!dev)) {
221 rc = -ENODEV;
222 goto unlock;
223 }
224 if (dev->class != ATA_DEV_ATA) {
225 rc = -EOPNOTSUPP;
226 goto unlock;
227 }
228
229 if (input >= 0) {
230 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
231 rc = -EOPNOTSUPP;
232 goto unlock;
233 }
234
235 dev->unpark_deadline = ata_deadline(jiffies, input);
236 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
237 ata_port_schedule_eh(ap);
238 complete(&ap->park_req_pending);
239 } else {
240 switch (input) {
241 case -1:
242 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
243 break;
244 case -2:
245 dev->flags |= ATA_DFLAG_NO_UNLOAD;
246 break;
247 }
248 }
249unlock:
250 spin_unlock_irqrestore(ap->lock, flags);
251
252 return rc ? rc : len;
253}
254DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
255 ata_scsi_park_show, ata_scsi_park_store);
256EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
257
f0761be3
TH		 258static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
259{
260 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
261
262 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
263}
264
18f7ba4c
KCA		 265static ssize_t
266ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
267 const char *buf, size_t count)
268{
269 struct Scsi_Host *shost = class_to_shost(dev);
270 struct ata_port *ap = ata_shost_to_port(shost);
271 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
272 return ap->ops->em_store(ap, buf, count);
273 return -EINVAL;
274}
275
276static ssize_t
277ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
278 char *buf)
279{
280 struct Scsi_Host *shost = class_to_shost(dev);
281 struct ata_port *ap = ata_shost_to_port(shost);
282
283 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
284 return ap->ops->em_show(ap, buf);
285 return -EINVAL;
286}
ea7a5ed5 287DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
18f7ba4c
KCA		 288 ata_scsi_em_message_show, ata_scsi_em_message_store);
289EXPORT_SYMBOL_GPL(dev_attr_em_message);
290
291static ssize_t
292ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
293 char *buf)
294{
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct ata_port *ap = ata_shost_to_port(shost);
297
298 return snprintf(buf, 23, "%d\n", ap->em_message_type);
299}
300DEVICE_ATTR(em_message_type, S_IRUGO,
301 ata_scsi_em_message_type_show, NULL);
302EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
303
304static ssize_t
305ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
306 char *buf)
307{
308 struct scsi_device *sdev = to_scsi_device(dev);
309 struct ata_port *ap = ata_shost_to_port(sdev->host);
310 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
311
312 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
313 return ap->ops->sw_activity_show(atadev, buf);
314 return -EINVAL;
315}
316
317static ssize_t
318ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
319 const char *buf, size_t count)
320{
321 struct scsi_device *sdev = to_scsi_device(dev);
322 struct ata_port *ap = ata_shost_to_port(sdev->host);
323 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
324 enum sw_activity val;
325 int rc;
326
327 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
328 val = simple_strtoul(buf, NULL, 0);
329 switch (val) {
330 case OFF: case BLINK_ON: case BLINK_OFF:
331 rc = ap->ops->sw_activity_store(atadev, val);
332 if (!rc)
333 return count;
334 else
335 return rc;
336 }
337 }
338 return -EINVAL;
339}
ea7a5ed5 340DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
18f7ba4c
KCA		 341 ata_scsi_activity_store);
342EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
343
45fabbb7
EO		 344struct device_attribute *ata_common_sdev_attrs[] = {
345 &dev_attr_unload_heads,
346 NULL
347};
348EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
349
b27dcfb0 350static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
ae006510
DG		 351{
352 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
353 /* "Invalid field in cbd" */
b27dcfb0 354 cmd->scsi_done(cmd);
ae006510
DG		 355}
356
1da177e4
LT		 357/**
358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
359 * @sdev: SCSI device for which BIOS geometry is to be determined
360 * @bdev: block device associated with @sdev
361 * @capacity: capacity of SCSI device
362 * @geom: location to which geometry will be output
363 *
364 * Generic bios head/sector/cylinder calculator
365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
366 * mapping. Some situations may arise where the disk is not
367 * bootable if this is not used.
368 *
369 * LOCKING:
370 * Defined by the SCSI layer. We don't really care.
371 *
372 * RETURNS:
373 * Zero.
374 */
375int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
376 sector_t capacity, int geom[])
377{
378 geom[0] = 255;
379 geom[1] = 63;
380 sector_div(capacity, 255*63);
381 geom[2] = capacity;
382
383 return 0;
384}
385
d8d9129e
TH		 386/**
387 * ata_scsi_unlock_native_capacity - unlock native capacity
388 * @sdev: SCSI device to adjust device capacity for
389 *
390 * This function is called if a partition on @sdev extends beyond
391 * the end of the device. It requests EH to unlock HPA.
392 *
393 * LOCKING:
394 * Defined by the SCSI layer. Might sleep.
395 */
396void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
397{
398 struct ata_port *ap = ata_shost_to_port(sdev->host);
399 struct ata_device *dev;
400 unsigned long flags;
401
402 spin_lock_irqsave(ap->lock, flags);
403
404 dev = ata_scsi_find_dev(ap, sdev);
405 if (dev && dev->n_sectors < dev->n_native_sectors) {
406 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
407 dev->link->eh_info.action |= ATA_EH_RESET;
408 ata_port_schedule_eh(ap);
409 }
410
411 spin_unlock_irqrestore(ap->lock, flags);
412 ata_port_wait_eh(ap);
413}
414
5924b74c
TH		 415/**
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 417 * @ap: target port
5924b74c
TH		 418 * @sdev: SCSI device to get identify data for
419 * @arg: User buffer area for identify data
420 *
421 * LOCKING:
422 * Defined by the SCSI layer. We don't really care.
423 *
424 * RETURNS:
425 * Zero on success, negative errno on error.
426 */
94be9a58
JG		 427static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
428 void __user *arg)
5924b74c 429{
5924b74c
TH		 430 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
431 u16 __user *dst = arg;
432 char buf[40];
433
434 if (!dev)
435 return -ENOMSG;
436
437 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
438 return -EFAULT;
439
440 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
441 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
442 return -EFAULT;
443
444 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
445 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
446 return -EFAULT;
447
448 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
449 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
450 return -EFAULT;
451
452 return 0;
453}
454
b095518e
JG		 455/**
456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 457 * @scsidev: Device to which we are issuing command
b095518e
JG		 458 * @arg: User provided data for issuing command
459 *
460 * LOCKING:
461 * Defined by the SCSI layer. We don't really care.
462 *
463 * RETURNS:
464 * Zero on success, negative errno on error.
465 */
b095518e
JG		 466int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
467{
468 int rc = 0;
469 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 470 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 471 int argsize = 0;
85837ebd 472 enum dma_data_direction data_dir;
bbe1fe7e 473 int cmd_result;
b095518e 474
c893a3ae 475 if (arg == NULL)
b095518e
JG		 476 return -EINVAL;
477
478 if (copy_from_user(args, arg, sizeof(args)))
479 return -EFAULT;
480
bbe1fe7e
ET		 481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
482 if (!sensebuf)
483 return -ENOMEM;
484
b095518e
JG		 485 memset(scsi_cmd, 0, sizeof(scsi_cmd));
486
487 if (args[3]) {
295124dc 488 argsize = ATA_SECT_SIZE * args[3];
b095518e 489 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 490 if (argbuf == NULL) {
491 rc = -ENOMEM;
492 goto error;
493 }
b095518e
JG		 494
495 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
496 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 497 block count in sector count field */
85837ebd 498 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 499 } else {
500 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 501 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 502 data_dir = DMA_NONE;
b095518e
JG		 503 }
504
505 scsi_cmd[0] = ATA_16;
506
507 scsi_cmd[4] = args[2];
a4f19040 508 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 509 scsi_cmd[6] = args[3];
510 scsi_cmd[8] = args[1];
511 scsi_cmd[10] = 0x4f;
512 scsi_cmd[12] = 0xc2;
513 } else {
514 scsi_cmd[6] = args[1];
515 }
516 scsi_cmd[14] = args[0];
517
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 520 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 521 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 522
523 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
524 u8 *desc = sensebuf + 8;
525 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526
527 /* If we set cc then ATA pass-through will cause a
528 * check condition even if no error. Filter that. */
529 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
530 struct scsi_sense_hdr sshdr;
531 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e
JG		 532 &sshdr);
533 if (sshdr.sense_key == 0 &&
534 sshdr.asc == 0 && sshdr.ascq == 0)
bbe1fe7e
ET		 535 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
536 }
537
538 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 539 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
540 desc[0] == 0x09) { /* code is "ATA Descriptor" */
541 args[0] = desc[13]; /* status */
542 args[1] = desc[3]; /* error */
543 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 544 if (copy_to_user(arg, args, sizeof(args)))
545 rc = -EFAULT;
546 }
547 }
548
549
550 if (cmd_result) {
b095518e
JG		 551 rc = -EIO;
552 goto error;
553 }
554
b095518e 555 if ((argbuf)
c893a3ae 556 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 557 rc = -EFAULT;
558error:
bbe1fe7e 559 kfree(sensebuf);
8f760780 560 kfree(argbuf);
b095518e
JG		 561 return rc;
562}
563
564/**
565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 566 * @scsidev: Device to which we are issuing command
b095518e
JG		 567 * @arg: User provided data for issuing command
568 *
569 * LOCKING:
570 * Defined by the SCSI layer. We don't really care.
571 *
572 * RETURNS:
573 * Zero on success, negative errno on error.
574 */
575int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
576{
577 int rc = 0;
578 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 579 u8 args[7], *sensebuf = NULL;
580 int cmd_result;
b095518e 581
c893a3ae 582 if (arg == NULL)
b095518e
JG		 583 return -EINVAL;
584
585 if (copy_from_user(args, arg, sizeof(args)))
586 return -EFAULT;
587
af068bd1
DM		 588 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
589 if (!sensebuf)
590 return -ENOMEM;
591
b095518e
JG		 592 memset(scsi_cmd, 0, sizeof(scsi_cmd));
593 scsi_cmd[0] = ATA_16;
594 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 595 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 596 scsi_cmd[4] = args[1];
597 scsi_cmd[6] = args[2];
598 scsi_cmd[8] = args[3];
599 scsi_cmd[10] = args[4];
600 scsi_cmd[12] = args[5];
277239f2 601 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 602 scsi_cmd[14] = args[0];
603
b095518e 604 /* Good values for timeout and retries? Values below
2e9edbf8 605 from scsi_ioctl_send_command() for default case... */
af068bd1 606 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 607 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 608
609 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
610 u8 *desc = sensebuf + 8;
611 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612
613 /* If we set cc then ATA pass-through will cause a
614 * check condition even if no error. Filter that. */
615 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
616 struct scsi_sense_hdr sshdr;
617 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
618 &sshdr);
2dcb407e
JG		 619 if (sshdr.sense_key == 0 &&
620 sshdr.asc == 0 && sshdr.ascq == 0)
af068bd1
DM		 621 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
622 }
623
624 /* Send userspace ATA registers */
625 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
626 desc[0] == 0x09) {/* code is "ATA Descriptor" */
627 args[0] = desc[13]; /* status */
628 args[1] = desc[3]; /* error */
629 args[2] = desc[5]; /* sector count (0:7) */
630 args[3] = desc[7]; /* lbal */
631 args[4] = desc[9]; /* lbam */
632 args[5] = desc[11]; /* lbah */
633 args[6] = desc[12]; /* select */
634 if (copy_to_user(arg, args, sizeof(args)))
635 rc = -EFAULT;
636 }
637 }
638
639 if (cmd_result) {
b095518e 640 rc = -EIO;
af068bd1
DM		 641 goto error;
642 }
b095518e 643
af068bd1
DM		 644 error:
645 kfree(sensebuf);
b095518e
JG		 646 return rc;
647}
648
e3cf95dd
AC		 649static int ata_ioc32(struct ata_port *ap)
650{
651 if (ap->flags & ATA_FLAG_PIO_DMA)
652 return 1;
653 if (ap->pflags & ATA_PFLAG_PIO32)
654 return 1;
655 return 0;
656}
657
94be9a58
JG		 658int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
659 int cmd, void __user *arg)
1da177e4 660{
1da177e4 661 int val = -EINVAL, rc = -EINVAL;
e3cf95dd 662 unsigned long flags;
1da177e4 663
1da177e4
LT		 664 switch (cmd) {
665 case ATA_IOC_GET_IO32:
e3cf95dd
AC		 666 spin_lock_irqsave(ap->lock, flags);
667 val = ata_ioc32(ap);
668 spin_unlock_irqrestore(ap->lock, flags);
1da177e4
LT		 669 if (copy_to_user(arg, &val, 1))
670 return -EFAULT;
671 return 0;
672
673 case ATA_IOC_SET_IO32:
674 val = (unsigned long) arg;
e3cf95dd
AC		 675 rc = 0;
676 spin_lock_irqsave(ap->lock, flags);
677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
678 if (val)
679 ap->pflags |= ATA_PFLAG_PIO32;
680 else
681 ap->pflags &= ~ATA_PFLAG_PIO32;
682 } else {
683 if (val != ata_ioc32(ap))
684 rc = -EINVAL;
685 }
686 spin_unlock_irqrestore(ap->lock, flags);
687 return rc;
1da177e4 688
5924b74c 689 case HDIO_GET_IDENTITY:
94be9a58 690 return ata_get_identity(ap, scsidev, arg);
5924b74c 691
b095518e
JG		 692 case HDIO_DRIVE_CMD:
693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
694 return -EACCES;
695 return ata_cmd_ioctl(scsidev, arg);
696
697 case HDIO_DRIVE_TASK:
698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
699 return -EACCES;
700 return ata_task_ioctl(scsidev, arg);
701
1da177e4
LT		 702 default:
703 rc = -ENOTTY;
704 break;
705 }
706
1da177e4
LT		 707 return rc;
708}
94be9a58
JG		 709EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
710
711int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
712{
713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
714 scsidev, cmd, arg);
715}
716EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 717
718/**
719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 720 * @dev: ATA device to which the new command is attached
721 * @cmd: SCSI command that originated this ATA command
1da177e4
LT		 722 *
723 * Obtain a reference to an unused ata_queued_cmd structure,
724 * which is the basic libata structure representing a single
725 * ATA command sent to the hardware.
726 *
727 * If a command was available, fill in the SCSI-specific
728 * portions of the structure with information on the
729 * current command.
730 *
731 * LOCKING:
cca3974e 732 * spin_lock_irqsave(host lock)
1da177e4
LT		 733 *
734 * RETURNS:
735 * Command allocated, or %NULL if none available.
736 */
7102d230 737static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
b27dcfb0 738 struct scsi_cmnd *cmd)
1da177e4
LT		 739{
740 struct ata_queued_cmd *qc;
741
8a8bc223 742 qc = ata_qc_new_init(dev);
1da177e4
LT		 743 if (qc) {
744 qc->scsicmd = cmd;
b27dcfb0 745 qc->scsidone = cmd->scsi_done;
1da177e4 746
ff2aeb1e 747 qc->sg = scsi_sglist(cmd);
7120165c 748 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 749 } else {
750 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
b27dcfb0 751 cmd->scsi_done(cmd);
1da177e4
LT		 752 }
753
754 return qc;
755}
756
aacda375
TH		 757static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
758{
759 struct scsi_cmnd *scmd = qc->scsicmd;
760
761 qc->extrabytes = scmd->request->extra_len;
762 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
763}
764
b095518e
JG		 765/**
766 * ata_dump_status - user friendly display of error info
767 * @id: id of the port in question
768 * @tf: ptr to filled out taskfile
769 *
770 * Decode and dump the ATA error/status registers for the user so
771 * that they have some idea what really happened at the non
772 * make-believe layer.
773 *
774 * LOCKING:
775 * inherited from caller
776 */
7102d230 777static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 778{
779 u8 stat = tf->command, err = tf->feature;
780
781 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
782 if (stat & ATA_BUSY) {
783 printk("Busy }\n"); /* Data is not valid in this case */
784 } else {
785 if (stat & 0x40) printk("DriveReady ");
786 if (stat & 0x20) printk("DeviceFault ");
787 if (stat & 0x10) printk("SeekComplete ");
788 if (stat & 0x08) printk("DataRequest ");
789 if (stat & 0x04) printk("CorrectedError ");
790 if (stat & 0x02) printk("Index ");
791 if (stat & 0x01) printk("Error ");
792 printk("}\n");
793
794 if (err) {
795 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
796 if (err & 0x04) printk("DriveStatusError ");
797 if (err & 0x80) {
798 if (err & 0x04) printk("BadCRC ");
799 else printk("Sector ");
800 }
801 if (err & 0x40) printk("UncorrectableError ");
802 if (err & 0x10) printk("SectorIdNotFound ");
803 if (err & 0x02) printk("TrackZeroNotFound ");
804 if (err & 0x01) printk("AddrMarkNotFound ");
805 printk("}\n");
806 }
807 }
808}
809
1da177e4
LT		 810/**
811 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 812 * @id: ATA device number
1da177e4 813 * @drv_stat: value contained in ATA status register
b095518e
JG		 814 * @drv_err: value contained in ATA error register
815 * @sk: the sense key we'll fill out
816 * @asc: the additional sense code we'll fill out
817 * @ascq: the additional sense code qualifier we'll fill out
246619da 818 * @verbose: be verbose
1da177e4 819 *
b095518e
JG		 820 * Converts an ATA error into a SCSI error. Fill out pointers to
821 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
822 * format sense blocks.
1da177e4
LT		 823 *
824 * LOCKING:
cca3974e 825 * spin_lock_irqsave(host lock)
1da177e4 826 */
7102d230
AB		 827static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
828 u8 *asc, u8 *ascq, int verbose)
1da177e4 829{
b095518e 830 int i;
ffe75ef6 831
1da177e4 832 /* Based on the 3ware driver translation table */
98ac62de 833 static const unsigned char sense_table[][4] = {
1da177e4
LT		 834 /* BBD|ECC|ID|MAR */
835 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
836 /* BBD|ECC|ID */
837 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
838 /* ECC|MC|MARK */
839 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
840 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
841 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
842 /* MC|ID|ABRT|TRK0|MARK */
843 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
844 /* MCR|MARK */
845 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
846 /* Bad address mark */
847 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
848 /* TRK0 */
849 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
850 /* Abort & !ICRC */
851 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
852 /* Media change request */
853 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
854 /* SRV */
855 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
856 /* Media change */
857 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
858 /* ECC */
859 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
860 /* BBD - block marked bad */
861 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
862 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
863 };
98ac62de 864 static const unsigned char stat_table[][4] = {
1da177e4
LT		 865 /* Must be first because BUSY means no other bits valid */
866 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
867 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
868 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
869 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
870 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
871 };
1da177e4 872
1da177e4
LT		 873 /*
874 * Is this an error we can process/parse
875 */
b095518e
JG		 876 if (drv_stat & ATA_BUSY) {
877 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 878 }
b095518e
JG		 879
880 if (drv_err) {
881 /* Look for drv_err */
882 for (i = 0; sense_table[i][0] != 0xFF; i++) {
883 /* Look for best matches first */
2e9edbf8 884 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 885 sense_table[i][0]) {
886 *sk = sense_table[i][1];
887 *asc = sense_table[i][2];
888 *ascq = sense_table[i][3];
889 goto translate_done;
890 }
891 }
892 /* No immediate match */
246619da
TH		 893 if (verbose)
894 printk(KERN_WARNING "ata%u: no sense translation for "
895 "error 0x%02x\n", id, drv_err);
1da177e4 896 }
b095518e
JG		 897
898 /* Fall back to interpreting status bits */
899 for (i = 0; stat_table[i][0] != 0xFF; i++) {
900 if (stat_table[i][0] & drv_stat) {
901 *sk = stat_table[i][1];
902 *asc = stat_table[i][2];
903 *ascq = stat_table[i][3];
904 goto translate_done;
1da177e4 905 }
b095518e
JG		 906 }
907 /* No error? Undecoded? */
246619da
TH		 908 if (verbose)
909 printk(KERN_WARNING "ata%u: no sense translation for "
910 "status: 0x%02x\n", id, drv_stat);
b095518e 911
2d202024
AC		 912 /* We need a sensible error return here, which is tricky, and one
913 that won't cause people to do things like return a disk wrongly */
914 *sk = ABORTED_COMMAND;
915 *asc = 0x00;
916 *ascq = 0x00;
b095518e
JG		 917
918 translate_done:
246619da
TH		 919 if (verbose)
920 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
921 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
922 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 923 return;
924}
925
926/*
750426aa 927 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 928 * @qc: Command that completed.
929 *
930 * This function is specific to the ATA descriptor format sense
931 * block specified for the ATA pass through commands. Regardless
932 * of whether the command errored or not, return a sense
933 * block. Copy all controller registers into the sense
934 * block. Clear sense key, ASC & ASCQ if there is no error.
935 *
936 * LOCKING:
750426aa 937 * None.
b095518e 938 */
750426aa 939static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 940{
941 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 942 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 943 unsigned char *sb = cmd->sense_buffer;
944 unsigned char *desc = sb + 8;
246619da 945 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 946
947 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
948
0e5dec47 949 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 950
b095518e
JG		 951 /*
952 * Use ata_to_sense_error() to map status register bits
953 * onto sense key, asc & ascq.
954 */
058e55e1
TH		 955 if (qc->err_mask ||
956 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 957 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 958 &sb[1], &sb[2], &sb[3], verbose);
b095518e 959 sb[1] &= 0x0f;
1da177e4
LT		 960 }
961
b095518e
JG		 962 /*
963 * Sense data is current and format is descriptor.
964 */
965 sb[0] = 0x72;
1da177e4 966
b095518e
JG		 967 desc[0] = 0x09;
968
f38621b3
TH		 969 /* set length of additional sense data */
970 sb[7] = 14;
971 desc[1] = 12;
b095518e
JG		 972
973 /*
974 * Copy registers into sense buffer.
975 */
976 desc[2] = 0x00;
977 desc[3] = tf->feature; /* == error reg */
978 desc[5] = tf->nsect;
979 desc[7] = tf->lbal;
980 desc[9] = tf->lbam;
981 desc[11] = tf->lbah;
982 desc[12] = tf->device;
983 desc[13] = tf->command; /* == status reg */
984
985 /*
986 * Fill in Extend bit, and the high order bytes
987 * if applicable.
988 */
989 if (tf->flags & ATA_TFLAG_LBA48) {
990 desc[2] |= 0x01;
991 desc[4] = tf->hob_nsect;
992 desc[6] = tf->hob_lbal;
993 desc[8] = tf->hob_lbam;
994 desc[10] = tf->hob_lbah;
1da177e4 995 }
b095518e 996}
1da177e4 997
b095518e 998/**
750426aa 999 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1000 * @qc: Command that we are erroring out
1001 *
d25614ba 1002 * Generate sense block for a failed ATA command @qc. Descriptor
25985edc 1003 * format is used to accommodate LBA48 block address.
b095518e
JG		 1004 *
1005 * LOCKING:
750426aa 1006 * None.
b095518e 1007 */
750426aa 1008static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1009{
d25614ba 1010 struct ata_device *dev = qc->dev;
b095518e 1011 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1012 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1013 unsigned char *sb = cmd->sense_buffer;
d25614ba 1014 unsigned char *desc = sb + 8;
246619da 1015 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1016 u64 block;
b095518e
JG		 1017
1018 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1019
0e5dec47 1020 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1021
d25614ba
TH		 1022 /* sense data is current and format is descriptor */
1023 sb[0] = 0x72;
1024
1025 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1026 * onto sense key, asc & ascq.
1027 */
058e55e1
TH		 1028 if (qc->err_mask ||
1029 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1030 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1031 &sb[1], &sb[2], &sb[3], verbose);
1032 sb[1] &= 0x0f;
1da177e4 1033 }
1da177e4 1034
d25614ba 1035 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1036
d25614ba
TH		 1037 /* information sense data descriptor */
1038 sb[7] = 12;
1039 desc[0] = 0x00;
1040 desc[1] = 10;
a7dac447 1041
d25614ba
TH		 1042 desc[2] |= 0x80; /* valid */
1043 desc[6] = block >> 40;
1044 desc[7] = block >> 32;
1045 desc[8] = block >> 24;
1046 desc[9] = block >> 16;
1047 desc[10] = block >> 8;
1048 desc[11] = block;
1da177e4
LT		 1049}
1050
a6cce2a7
BK		 1051static void ata_scsi_sdev_config(struct scsi_device *sdev)
1052{
1053 sdev->use_10_for_rw = 1;
1054 sdev->use_10_for_ms = 1;
3c6bdaea 1055 sdev->no_report_opcodes = 1;
5db44863 1056 sdev->no_write_same = 1;
31cc23b3
TH		 1057
1058 /* Schedule policy is determined by ->qc_defer() callback and
1059 * it needs to see every deferred qc. Set dev_blocked to 1 to
1060 * prevent SCSI midlayer from automatically deferring
1061 * requests.
1062 */
1063 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1064}
1065
fa2fc7f4
JB		 1066/**
1067 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1068 * @rq: request to be checked
fa2fc7f4
JB		 1069 *
1070 * ATAPI commands which transfer variable length data to host
1071 * might overflow due to application error or hardare bug. This
1072 * function checks whether overflow should be drained and ignored
1073 * for @request.
1074 *
1075 * LOCKING:
1076 * None.
1077 *
1078 * RETURNS:
1079 * 1 if ; otherwise, 0.
1080 */
1081static int atapi_drain_needed(struct request *rq)
1082{
33659ebb 1083 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1084 return 0;
1085
7b6d91da 1086 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
fa2fc7f4
JB		 1087 return 0;
1088
1089 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1090}
1091
1092static int ata_scsi_dev_config(struct scsi_device *sdev,
1093 struct ata_device *dev)
a6cce2a7 1094{
900e599e 1095 struct request_queue *q = sdev->request_queue;
1096
45fabbb7
EO		 1097 if (!ata_id_has_unload(dev->id))
1098 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1099
914ed354 1100 /* configure max sectors */
900e599e 1101 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1102
fa2fc7f4 1103 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1104 void *buf;
1105
729a6a30
TH		 1106 sdev->sector_size = ATA_SECT_SIZE;
1107
1108 /* set DMA padding */
900e599e 1109 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1110
1111 /* configure draining */
1112 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1113 if (!buf) {
a9a79dfe 1114 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1115 return -ENOMEM;
1116 }
1117
1118 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1119 } else {
295124dc 1120 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1121 sdev->manage_start_stop = 1;
dde20207 1122 }
d8cf5389 1123
729a6a30
TH		 1124 /*
1125 * ata_pio_sectors() expects buffer for each sector to not cross
1126 * page boundary. Enforce it by requiring buffers to be sector
1127 * aligned, which works iff sector_size is not larger than
1128 * PAGE_SIZE. ATAPI devices also need the alignment as
1129 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1130 */
1131 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1132 ata_dev_warn(dev,
729a6a30
TH		 1133 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1134 sdev->sector_size);
1135
900e599e 1136 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1137
f26792d5
JG		 1138 if (dev->flags & ATA_DFLAG_AN)
1139 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1140
a6e6ce8e
TH		 1141 if (dev->flags & ATA_DFLAG_NCQ) {
1142 int depth;
1143
1144 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1145 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1146 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1147 }
fa2fc7f4 1148
900e599e 1149 blk_queue_flush_queueable(q, false);
1150
295124dc 1151 dev->sdev = sdev;
fa2fc7f4 1152 return 0;
a6cce2a7
BK		 1153}
1154
1da177e4
LT		 1155/**
1156 * ata_scsi_slave_config - Set SCSI device attributes
1157 * @sdev: SCSI device to examine
1158 *
1159 * This is called before we actually start reading
1160 * and writing to the device, to configure certain
1161 * SCSI mid-layer behaviors.
1162 *
1163 * LOCKING:
1164 * Defined by SCSI layer. We don't really care.
1165 */
1166
1167int ata_scsi_slave_config(struct scsi_device *sdev)
1168{
31534363
TH		 1169 struct ata_port *ap = ata_shost_to_port(sdev->host);
1170 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1171 int rc = 0;
31534363 1172
a6cce2a7 1173 ata_scsi_sdev_config(sdev);
1da177e4 1174
31534363 1175 if (dev)
fa2fc7f4 1176 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1177
fa2fc7f4 1178 return rc;
1da177e4
LT		 1179}
1180
83c47bcb
TH		 1181/**
1182 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1183 * @sdev: SCSI device to be destroyed
1184 *
1185 * @sdev is about to be destroyed for hot/warm unplugging. If
1186 * this unplugging was initiated by libata as indicated by NULL
1187 * dev->sdev, this function doesn't have to do anything.
1188 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1189 * Clear dev->sdev, schedule the device for ATA detach and invoke
1190 * EH.
1191 *
1192 * LOCKING:
1193 * Defined by SCSI layer. We don't really care.
1194 */
1195void ata_scsi_slave_destroy(struct scsi_device *sdev)
1196{
1197 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1198 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1199 unsigned long flags;
1200 struct ata_device *dev;
1201
1202 if (!ap->ops->error_handler)
1203 return;
1204
ba6a1308 1205 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1206 dev = __ata_scsi_find_dev(ap, sdev);
1207 if (dev && dev->sdev) {
1208 /* SCSI device already in CANCEL state, no need to offline it */
1209 dev->sdev = NULL;
1210 dev->flags |= ATA_DFLAG_DETACH;
1211 ata_port_schedule_eh(ap);
1212 }
ba6a1308 1213 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1214
1215 kfree(q->dma_drain_buffer);
1216 q->dma_drain_buffer = NULL;
1217 q->dma_drain_size = 0;
83c47bcb
TH		 1218}
1219
a6e6ce8e 1220/**
f6e67035 1221 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
6d2dd054
MPS		 1222 * @ap: ATA port to which the device change the queue depth
1223 * @sdev: SCSI device to configure queue depth for
1224 * @queue_depth: new queue depth
1225 * @reason: calling context
a6e6ce8e 1226 *
f6e67035
DW		 1227 * libsas and libata have different approaches for associating a sdev to
1228 * its ata_port.
a6e6ce8e 1229 *
a6e6ce8e 1230 */
f6e67035
DW		 1231int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1232 int queue_depth, int reason)
a6e6ce8e 1233{
a6e6ce8e 1234 struct ata_device *dev;
360f654e 1235 unsigned long flags;
a6e6ce8e 1236
e881a172
MC		 1237 if (reason != SCSI_QDEPTH_DEFAULT)
1238 return -EOPNOTSUPP;
1239
c3c70c44 1240 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1241 return sdev->queue_depth;
1242
1243 dev = ata_scsi_find_dev(ap, sdev);
1244 if (!dev || !ata_dev_enabled(dev))
1245 return sdev->queue_depth;
1246
c3c70c44 1247 /* NCQ enabled? */
360f654e 1248 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1249 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1250 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1251 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1252 queue_depth = 1;
1253 }
360f654e
TH		 1254 spin_unlock_irqrestore(ap->lock, flags);
1255
c3c70c44
TH		 1256 /* limit and apply queue depth */
1257 queue_depth = min(queue_depth, sdev->host->can_queue);
1258 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1259 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1260
1261 if (sdev->queue_depth == queue_depth)
1262 return -EINVAL;
1263
1264 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1265 return queue_depth;
1266}
1267
f6e67035
DW		 1268/**
1269 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1270 * @sdev: SCSI device to configure queue depth for
1271 * @queue_depth: new queue depth
1272 * @reason: calling context
1273 *
1274 * This is libata standard hostt->change_queue_depth callback.
1275 * SCSI will call into this callback when user tries to set queue
1276 * depth via sysfs.
1277 *
1278 * LOCKING:
1279 * SCSI layer (we don't care)
1280 *
1281 * RETURNS:
1282 * Newly configured queue depth.
1283 */
1284int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1285 int reason)
1286{
1287 struct ata_port *ap = ata_shost_to_port(sdev->host);
1288
1289 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1290}
1291
972dcafb
DG		 1292/**
1293 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1294 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1295 *
1296 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1297 * (to start). Perhaps these commands should be preceded by
1298 * CHECK POWER MODE to see what power mode the device is already in.
1299 * [See SAT revision 5 at www.t10.org]
1300 *
1301 * LOCKING:
cca3974e 1302 * spin_lock_irqsave(host lock)
972dcafb
DG		 1303 *
1304 * RETURNS:
1305 * Zero on success, non-zero on error.
1306 */
ad706991 1307static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1308{
542b1444 1309 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1310 struct ata_taskfile *tf = &qc->tf;
ad706991 1311 const u8 *cdb = scmd->cmnd;
972dcafb 1312
2e5704f6
TH		 1313 if (scmd->cmd_len < 5)
1314 goto invalid_fld;
1315
972dcafb
DG		 1316 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1317 tf->protocol = ATA_PROT_NODATA;
542b1444 1318 if (cdb[1] & 0x1) {
972dcafb
DG		 1319 ; /* ignore IMMED bit, violates sat-r05 */
1320 }
542b1444 1321 if (cdb[4] & 0x2)
ae006510 1322 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1323 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1324 goto invalid_fld; /* power conditions not supported */
e31e8531 1325
542b1444 1326 if (cdb[4] & 0x1) {
972dcafb 1327 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1328
1329 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1330 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1331
1332 tf->lbah = 0x0;
1333 tf->lbam = 0x0;
1334 tf->lbal = 0x0;
1335 tf->device |= ATA_LBA;
1336 } else {
1337 /* CHS */
1338 tf->lbal = 0x1; /* sect */
1339 tf->lbam = 0x0; /* cyl low */
1340 tf->lbah = 0x0; /* cyl high */
1341 }
1342
972dcafb 1343 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1344 } else {
2a6e58d2
RW		 1345 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1346 * or S5) causing some drives to spin up and down again.
1347 */
1348 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1349 system_state == SYSTEM_POWER_OFF)
1350 goto skip;
1351
1352 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1353 system_entering_hibernation())
1354 goto skip;
1355
78981a7c
RH		 1356 /* Issue ATA STANDBY IMMEDIATE command */
1357 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1358 }
78981a7c 1359
972dcafb
DG		 1360 /*
1361 * Standby and Idle condition timers could be implemented but that
1362 * would require libata to implement the Power condition mode page
1363 * and allow the user to change it. Changing mode pages requires
1364 * MODE SELECT to be implemented.
1365 */
1366
1367 return 0;
ae006510 1368
2a6e58d2 1369 invalid_fld:
542b1444 1370 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1371 /* "Invalid field in cbd" */
1372 return 1;
2a6e58d2
RW		 1373 skip:
1374 scmd->result = SAM_STAT_GOOD;
1375 return 1;
972dcafb
DG		 1376}
1377
1378
1da177e4
LT		 1379/**
1380 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1381 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1382 *
1383 * Sets up an ATA taskfile to issue FLUSH CACHE or
1384 * FLUSH CACHE EXT.
1385 *
1386 * LOCKING:
cca3974e 1387 * spin_lock_irqsave(host lock)
1da177e4
LT		 1388 *
1389 * RETURNS:
1390 * Zero on success, non-zero on error.
1391 */
ad706991 1392static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1393{
1394 struct ata_taskfile *tf = &qc->tf;
1395
1396 tf->flags |= ATA_TFLAG_DEVICE;
1397 tf->protocol = ATA_PROT_NODATA;
1398
6fc49adb 1399 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1400 tf->command = ATA_CMD_FLUSH_EXT;
1401 else
1402 tf->command = ATA_CMD_FLUSH;
1403
b666da35
TH		 1404 /* flush is critical for IO integrity, consider it an IO command */
1405 qc->flags |= ATA_QCFLAG_IO;
1406
1da177e4
LT		 1407 return 0;
1408}
1409
3aef5231
AL		 1410/**
1411 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1412 * @cdb: SCSI command to translate
3aef5231
AL		 1413 *
1414 * Calculate LBA and transfer length for 6-byte commands.
1415 *
1416 * RETURNS:
1417 * @plba: the LBA
1418 * @plen: the transfer length
1419 */
542b1444 1420static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1421{
1422 u64 lba = 0;
6c7b7d2b 1423 u32 len;
3aef5231
AL		 1424
1425 VPRINTK("six-byte command\n");
1426
6c7b7d2b 1427 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1428 lba |= ((u64)cdb[2]) << 8;
1429 lba |= ((u64)cdb[3]);
3aef5231 1430
6c7b7d2b 1431 len = cdb[4];
3aef5231
AL		 1432
1433 *plba = lba;
1434 *plen = len;
1435}
1436
1437/**
1438 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1439 * @cdb: SCSI command to translate
3aef5231
AL		 1440 *
1441 * Calculate LBA and transfer length for 10-byte commands.
1442 *
1443 * RETURNS:
1444 * @plba: the LBA
1445 * @plen: the transfer length
1446 */
542b1444 1447static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1448{
1449 u64 lba = 0;
1450 u32 len = 0;
1451
1452 VPRINTK("ten-byte command\n");
1453
542b1444
TH		 1454 lba |= ((u64)cdb[2]) << 24;
1455 lba |= ((u64)cdb[3]) << 16;
1456 lba |= ((u64)cdb[4]) << 8;
1457 lba |= ((u64)cdb[5]);
3aef5231 1458
542b1444
TH		 1459 len |= ((u32)cdb[7]) << 8;
1460 len |= ((u32)cdb[8]);
3aef5231
AL		 1461
1462 *plba = lba;
1463 *plen = len;
1464}
1465
1466/**
1467 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1468 * @cdb: SCSI command to translate
3aef5231
AL		 1469 *
1470 * Calculate LBA and transfer length for 16-byte commands.
1471 *
1472 * RETURNS:
1473 * @plba: the LBA
1474 * @plen: the transfer length
1475 */
542b1444 1476static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1477{
1478 u64 lba = 0;
1479 u32 len = 0;
1480
1481 VPRINTK("sixteen-byte command\n");
1482
542b1444
TH		 1483 lba |= ((u64)cdb[2]) << 56;
1484 lba |= ((u64)cdb[3]) << 48;
1485 lba |= ((u64)cdb[4]) << 40;
1486 lba |= ((u64)cdb[5]) << 32;
1487 lba |= ((u64)cdb[6]) << 24;
1488 lba |= ((u64)cdb[7]) << 16;
1489 lba |= ((u64)cdb[8]) << 8;
1490 lba |= ((u64)cdb[9]);
3aef5231 1491
542b1444
TH		 1492 len |= ((u32)cdb[10]) << 24;
1493 len |= ((u32)cdb[11]) << 16;
1494 len |= ((u32)cdb[12]) << 8;
1495 len |= ((u32)cdb[13]);
3aef5231
AL		 1496
1497 *plba = lba;
1498 *plen = len;
1499}
1500
1da177e4
LT		 1501/**
1502 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1503 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1504 *
1505 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1506 *
1507 * LOCKING:
cca3974e 1508 * spin_lock_irqsave(host lock)
1da177e4
LT		 1509 *
1510 * RETURNS:
1511 * Zero on success, non-zero on error.
1512 */
ad706991 1513static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1514{
542b1444 1515 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1516 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1517 struct ata_device *dev = qc->dev;
1da177e4 1518 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1519 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1520 u64 block;
1521 u32 n_block;
1da177e4
LT		 1522
1523 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1524 tf->protocol = ATA_PROT_NODATA;
1da177e4 1525
2e5704f6
TH		 1526 if (cdb[0] == VERIFY) {
1527 if (scmd->cmd_len < 10)
1528 goto invalid_fld;
542b1444 1529 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1530 } else if (cdb[0] == VERIFY_16) {
1531 if (scmd->cmd_len < 16)
1532 goto invalid_fld;
542b1444 1533 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1534 } else
ae006510 1535 goto invalid_fld;
1da177e4 1536
8bf62ece 1537 if (!n_block)
ae006510 1538 goto nothing_to_do;
8bf62ece 1539 if (block >= dev_sectors)
ae006510 1540 goto out_of_range;
8bf62ece 1541 if ((block + n_block) > dev_sectors)
ae006510 1542 goto out_of_range;
1da177e4 1543
07506697
AL		 1544 if (dev->flags & ATA_DFLAG_LBA) {
1545 tf->flags |= ATA_TFLAG_LBA;
1546
c6a33e24
AL		 1547 if (lba_28_ok(block, n_block)) {
1548 /* use LBA28 */
1549 tf->command = ATA_CMD_VERIFY;
1550 tf->device |= (block >> 24) & 0xf;
1551 } else if (lba_48_ok(block, n_block)) {
1552 if (!(dev->flags & ATA_DFLAG_LBA48))
1553 goto out_of_range;
07506697
AL		 1554
1555 /* use LBA48 */
1556 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1557 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1558
8bf62ece 1559 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1560
8bf62ece
AL		 1561 tf->hob_lbah = (block >> 40) & 0xff;
1562 tf->hob_lbam = (block >> 32) & 0xff;
1563 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1564 } else
1565 /* request too large even for LBA48 */
1566 goto out_of_range;
8bf62ece
AL		 1567
1568 tf->nsect = n_block & 0xff;
1da177e4 1569
8bf62ece
AL		 1570 tf->lbah = (block >> 16) & 0xff;
1571 tf->lbam = (block >> 8) & 0xff;
1572 tf->lbal = block & 0xff;
1da177e4 1573
8bf62ece
AL		 1574 tf->device |= ATA_LBA;
1575 } else {
1576 /* CHS */
1577 u32 sect, head, cyl, track;
1578
c6a33e24
AL		 1579 if (!lba_28_ok(block, n_block))
1580 goto out_of_range;
07506697 1581
8bf62ece
AL		 1582 /* Convert LBA to CHS */
1583 track = (u32)block / dev->sectors;
1584 cyl = track / dev->heads;
1585 head = track % dev->heads;
1586 sect = (u32)block % dev->sectors + 1;
1587
c187c4b5
AL		 1588 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1589 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1590
1591 /* Check whether the converted CHS can fit.
1592 Cylinder: 0-65535
8bf62ece
AL		 1593 Head: 0-15
1594 Sector: 1-255*/
2e9edbf8 1595 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1596 goto out_of_range;
2e9edbf8 1597
8bf62ece
AL		 1598 tf->command = ATA_CMD_VERIFY;
1599 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1600 tf->lbal = sect;
1601 tf->lbam = cyl;
1602 tf->lbah = cyl >> 8;
1603 tf->device |= head;
1604 }
1da177e4
LT		 1605
1606 return 0;
ae006510
DG		 1607
1608invalid_fld:
542b1444 1609 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1610 /* "Invalid field in cbd" */
1611 return 1;
1612
1613out_of_range:
542b1444 1614 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1615 /* "Logical Block Address out of range" */
1616 return 1;
1617
1618nothing_to_do:
542b1444 1619 scmd->result = SAM_STAT_GOOD;
ae006510 1620 return 1;
1da177e4
LT		 1621}
1622
1623/**
1624 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1625 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1626 *
1627 * Converts any of six SCSI read/write commands into the
1628 * ATA counterpart, including starting sector (LBA),
1629 * sector count, and taking into account the device's LBA48
1630 * support.
1631 *
1632 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1633 * %WRITE_16 are currently supported.
1634 *
1635 * LOCKING:
cca3974e 1636 * spin_lock_irqsave(host lock)
1da177e4
LT		 1637 *
1638 * RETURNS:
1639 * Zero on success, non-zero on error.
1640 */
ad706991 1641static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1642{
542b1444 1643 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1644 const u8 *cdb = scmd->cmnd;
bd056d7e 1645 unsigned int tf_flags = 0;
3aef5231
AL		 1646 u64 block;
1647 u32 n_block;
bd056d7e 1648 int rc;
1da177e4 1649
542b1444 1650 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1651 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1652
9a3dccc4 1653 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1654 switch (cdb[0]) {
3aef5231
AL		 1655 case READ_10:
1656 case WRITE_10:
2e5704f6
TH		 1657 if (unlikely(scmd->cmd_len < 10))
1658 goto invalid_fld;
542b1444 1659 scsi_10_lba_len(cdb, &block, &n_block);
3e451a49 1660 if (cdb[1] & (1 << 3))
bd056d7e 1661 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1662 break;
1663 case READ_6:
1664 case WRITE_6:
2e5704f6
TH		 1665 if (unlikely(scmd->cmd_len < 6))
1666 goto invalid_fld;
542b1444 1667 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1668
1669 /* for 6-byte r/w commands, transfer length 0
1670 * means 256 blocks of data, not 0 block.
1671 */
76b2bf9b
JG		 1672 if (!n_block)
1673 n_block = 256;
3aef5231
AL		 1674 break;
1675 case READ_16:
1676 case WRITE_16:
2e5704f6
TH		 1677 if (unlikely(scmd->cmd_len < 16))
1678 goto invalid_fld;
542b1444 1679 scsi_16_lba_len(cdb, &block, &n_block);
3e451a49 1680 if (cdb[1] & (1 << 3))
bd056d7e 1681 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1682 break;
1683 default:
8bf62ece 1684 DPRINTK("no-byte command\n");
ae006510 1685 goto invalid_fld;
1da177e4
LT		 1686 }
1687
8bf62ece
AL		 1688 /* Check and compose ATA command */
1689 if (!n_block)
c187c4b5
AL		 1690 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1691 * length 0 means transfer 0 block of data.
1692 * However, for ATA R/W commands, sector count 0 means
1693 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1694 *
1695 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1696 */
ae006510 1697 goto nothing_to_do;
1da177e4 1698
bd056d7e 1699 qc->flags |= ATA_QCFLAG_IO;
295124dc 1700 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1701
bd056d7e
TH		 1702 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1703 qc->tag);
1704 if (likely(rc == 0))
1705 return 0;
ae006510 1706
bd056d7e
TH		 1707 if (rc == -ERANGE)
1708 goto out_of_range;
1709 /* treat all other errors as -EINVAL, fall through */
ae006510 1710invalid_fld:
542b1444 1711 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1712 /* "Invalid field in cbd" */
1713 return 1;
1714
1715out_of_range:
542b1444 1716 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1717 /* "Logical Block Address out of range" */
1718 return 1;
1719
1720nothing_to_do:
542b1444 1721 scmd->result = SAM_STAT_GOOD;
ae006510 1722 return 1;
1da177e4
LT		 1723}
1724
77853bf2 1725static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1726{
c31f571d 1727 struct ata_port *ap = qc->ap;
1da177e4 1728 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1729 u8 *cdb = cmd->cmnd;
2dcb407e 1730 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1731
1732 /* For ATA pass thru (SAT) commands, generate a sense block if
1733 * user mandated it or if there's an error. Note that if we
1734 * generate because the user forced us to, a check condition
1735 * is generated and the ATA register values are returned
1736 * whether the command completed successfully or not. If there
1737 * was no error, SK, ASC and ASCQ will all be zero.
1738 */
a7dac447 1739 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1740 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1741 ata_gen_passthru_sense(qc);
b095518e
JG		 1742 } else {
1743 if (!need_sense) {
1744 cmd->result = SAM_STAT_GOOD;
1745 } else {
1746 /* TODO: decide which descriptor format to use
1747 * for 48b LBA devices and call that here
1748 * instead of the fixed desc, which is only
1749 * good for smaller LBA (and maybe CHS?)
1750 * devices.
1751 */
750426aa 1752 ata_gen_ata_sense(qc);
b095518e
JG		 1753 }
1754 }
1da177e4 1755
c31f571d 1756 if (need_sense && !ap->ops->error_handler)
44877b4e 1757 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1758
1759 qc->scsidone(cmd);
1760
77853bf2 1761 ata_qc_free(qc);
1da177e4
LT		 1762}
1763
1764/**
1765 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1766 * @dev: ATA device to which the command is addressed
1767 * @cmd: SCSI command to execute
1da177e4
LT		 1768 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1769 *
1770 * Our ->queuecommand() function has decided that the SCSI
1771 * command issued can be directly translated into an ATA
1772 * command, rather than handled internally.
1773 *
1774 * This function sets up an ata_queued_cmd structure for the
1775 * SCSI command, and sends that ata_queued_cmd to the hardware.
1776 *
ae006510
DG		 1777 * The xlat_func argument (actor) returns 0 if ready to execute
1778 * ATA command, else 1 to finish translation. If 1 is returned
1779 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1780 * to be set reflecting an error condition or clean (early)
1781 * termination.
1782 *
1da177e4 1783 * LOCKING:
cca3974e 1784 * spin_lock_irqsave(host lock)
2115ea94
TH		 1785 *
1786 * RETURNS:
1787 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1788 * needs to be deferred.
1da177e4 1789 */
2115ea94 1790static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1791 ata_xlat_func_t xlat_func)
1da177e4 1792{
31cc23b3 1793 struct ata_port *ap = dev->link->ap;
1da177e4 1794 struct ata_queued_cmd *qc;
31cc23b3 1795 int rc;
1da177e4
LT		 1796
1797 VPRINTK("ENTER\n");
1798
b27dcfb0 1799 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 1800 if (!qc)
ae006510 1801 goto err_mem;
1da177e4
LT		 1802
1803 /* data is present; dma-map it */
be7db055 1804 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1805 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1806 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 1807 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 1808 goto err_did;
1da177e4
LT		 1809 }
1810
7120165c 1811 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1812
1813 qc->dma_dir = cmd->sc_data_direction;
1814 }
1815
1816 qc->complete_fn = ata_scsi_qc_complete;
1817
ad706991 1818 if (xlat_func(qc))
ae006510 1819 goto early_finish;
1da177e4 1820
31cc23b3
TH		 1821 if (ap->ops->qc_defer) {
1822 if ((rc = ap->ops->qc_defer(qc)))
1823 goto defer;
1824 }
1825
1da177e4 1826 /* select device, send command to hardware */
8e0e694a 1827 ata_qc_issue(qc);
1da177e4
LT		 1828
1829 VPRINTK("EXIT\n");
2115ea94 1830 return 0;
1da177e4 1831
ae006510 1832early_finish:
2dcb407e 1833 ata_qc_free(qc);
b27dcfb0 1834 cmd->scsi_done(cmd);
ae006510 1835 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1836 return 0;
ae006510
DG		 1837
1838err_did:
1da177e4 1839 ata_qc_free(qc);
ae006510 1840 cmd->result = (DID_ERROR << 16);
b27dcfb0 1841 cmd->scsi_done(cmd);
253b92ec 1842err_mem:
ae006510 1843 DPRINTK("EXIT - internal\n");
2115ea94 1844 return 0;
3dc1d881
TH		 1845
1846defer:
31cc23b3 1847 ata_qc_free(qc);
3dc1d881 1848 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1849 if (rc == ATA_DEFER_LINK)
1850 return SCSI_MLQUEUE_DEVICE_BUSY;
1851 else
1852 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1853}
1854
1855/**
1856 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1857 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1858 * @flags: unsigned long variable to store irq enable status
1859 * @copy_in: copy in from user buffer
1da177e4 1860 *
87340e98 1861 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1862 *
1863 * LOCKING:
87340e98 1864 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1865 *
1866 * RETURNS:
87340e98 1867 * Pointer to response buffer.
1da177e4 1868 */
87340e98
TH		 1869static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1870 unsigned long *flags)
1da177e4 1871{
87340e98 1872 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1873
87340e98
TH		 1874 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1875 if (copy_in)
1876 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1877 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1878 return ata_scsi_rbuf;
1da177e4
LT		 1879}
1880
1881/**
1882 * ata_scsi_rbuf_put - Unmap response buffer.
1883 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1884 * @copy_out: copy out result
1885 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1886 *
87340e98
TH		 1887 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1888 * @copy_back is true.
1da177e4
LT		 1889 *
1890 * LOCKING:
87340e98 1891 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1892 */
87340e98
TH		 1893static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1894 unsigned long *flags)
1da177e4 1895{
87340e98
TH		 1896 if (copy_out)
1897 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1898 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1899 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1900}
1901
1902/**
1903 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @actor: Callback hook for desired SCSI command simulator
1906 *
1907 * Takes care of the hard work of simulating a SCSI command...
1908 * Mapping the response buffer, calling the command's handler,
1909 * and handling the handler's return value. This return value
1910 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1911 * completed successfully (0), or not (in which case cmd->result
1912 * and sense buffer are assumed to be set).
1da177e4
LT		 1913 *
1914 * LOCKING:
cca3974e 1915 * spin_lock_irqsave(host lock)
1da177e4 1916 */
f0761be3 1917static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1918 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1919{
1920 u8 *rbuf;
87340e98 1921 unsigned int rc;
1da177e4 1922 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1923 unsigned long flags;
1924
87340e98
TH		 1925 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1926 rc = actor(args, rbuf);
1927 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1928
ae006510 1929 if (rc == 0)
1da177e4 1930 cmd->result = SAM_STAT_GOOD;
ae006510 1931 args->done(cmd);
1da177e4
LT		 1932}
1933
1934/**
1935 * ata_scsiop_inq_std - Simulate INQUIRY command
1936 * @args: device IDENTIFY data / SCSI command of interest.
1937 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1938 *
1939 * Returns standard device identification data associated
b142eb65 1940 * with non-VPD INQUIRY command output.
1da177e4
LT		 1941 *
1942 * LOCKING:
cca3974e 1943 * spin_lock_irqsave(host lock)
1da177e4 1944 */
87340e98 1945static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1946{
87340e98
TH		 1947 const u8 versions[] = {
1948 0x60, /* SAM-3 (no version claimed) */
1949
1950 0x03,
1951 0x20, /* SBC-2 (no version claimed) */
1952
1953 0x02,
1954 0x60 /* SPC-3 (no version claimed) */
1955 };
1da177e4
LT		 1956 u8 hdr[] = {
1957 TYPE_DISK,
1958 0,
1959 0x5, /* claim SPC-3 version compatibility */
1960 2,
1961 95 - 4
1962 };
1963
87340e98
TH		 1964 VPRINTK("ENTER\n");
1965
1da177e4
LT		 1966 /* set scsi removeable (RMB) bit per ata bit */
1967 if (ata_id_removeable(args->id))
1968 hdr[1] |= (1 << 7);
1969
1da177e4 1970 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1971 memcpy(&rbuf[8], "ATA ", 8);
1972 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1973 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1974
87340e98
TH		 1975 if (rbuf[32] == 0 || rbuf[32] == ' ')
1976 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1977
87340e98 1978 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1979
1980 return 0;
1981}
1982
1983/**
b142eb65 1984 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1985 * @args: device IDENTIFY data / SCSI command of interest.
1986 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1987 *
b142eb65 1988 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1989 *
1990 * LOCKING:
cca3974e 1991 * spin_lock_irqsave(host lock)
1da177e4 1992 */
87340e98 1993static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1994{
1995 const u8 pages[] = {
1996 0x00, /* page 0x00, this page */
1997 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 1998 0x83, /* page 0x83, device ident page */
1999 0x89, /* page 0x89, ata info page */
18f0f978 2000 0xb0, /* page 0xb0, block limits page */
1e9dbc92 2001 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 2002 0xb2, /* page 0xb2, thin provisioning page */
1da177e4 2003 };
1da177e4 2004
87340e98
TH		 2005 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2006 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2007 return 0;
2008}
2009
2010/**
b142eb65 2011 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2012 * @args: device IDENTIFY data / SCSI command of interest.
2013 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2014 *
2015 * Returns ATA device serial number.
2016 *
2017 * LOCKING:
cca3974e 2018 * spin_lock_irqsave(host lock)
1da177e4 2019 */
87340e98 2020static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2021{
2022 const u8 hdr[] = {
2023 0,
2024 0x80, /* this page code */
2025 0,
a0cf733b 2026 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2027 };
1da177e4 2028
87340e98
TH		 2029 memcpy(rbuf, hdr, sizeof(hdr));
2030 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2031 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2032 return 0;
2033}
2034
1da177e4 2035/**
b142eb65 2036 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2037 * @args: device IDENTIFY data / SCSI command of interest.
2038 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2039 *
b142eb65
JG		 2040 * Yields two logical unit device identification designators:
2041 * - vendor specific ASCII containing the ATA serial number
2042 * - SAT defined "t10 vendor id based" containing ASCII vendor
2043 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2044 *
2045 * LOCKING:
cca3974e 2046 * spin_lock_irqsave(host lock)
1da177e4 2047 */
87340e98 2048static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2049{
b142eb65 2050 const int sat_model_serial_desc_len = 68;
87340e98 2051 int num;
1da177e4 2052
b142eb65
JG		 2053 rbuf[1] = 0x83; /* this page code */
2054 num = 4;
2055
87340e98
TH		 2056 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2057 rbuf[num + 0] = 2;
2058 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2059 num += 4;
2060 ata_id_string(args->id, (unsigned char *) rbuf + num,
2061 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2062 num += ATA_ID_SERNO_LEN;
2063
2064 /* SAT defined lu model and serial numbers descriptor */
2065 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2066 rbuf[num + 0] = 2;
2067 rbuf[num + 1] = 1;
2068 rbuf[num + 3] = sat_model_serial_desc_len;
2069 num += 4;
2070 memcpy(rbuf + num, "ATA ", 8);
2071 num += 8;
2072 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2073 ATA_ID_PROD_LEN);
2074 num += ATA_ID_PROD_LEN;
2075 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2076 ATA_ID_SERNO_LEN);
2077 num += ATA_ID_SERNO_LEN;
2078
6b3b9d73
HR		 2079 if (ata_id_has_wwn(args->id)) {
2080 /* SAT defined lu world wide name */
2081 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2082 rbuf[num + 0] = 1;
2083 rbuf[num + 1] = 3;
2084 rbuf[num + 3] = ATA_ID_WWN_LEN;
2085 num += 4;
2086 ata_id_string(args->id, (unsigned char *) rbuf + num,
2087 ATA_ID_WWN, ATA_ID_WWN_LEN);
2088 num += ATA_ID_WWN_LEN;
2089 }
b142eb65 2090 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2091 return 0;
2092}
2093
ad355b46
JG		 2094/**
2095 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2096 * @args: device IDENTIFY data / SCSI command of interest.
2097 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2098 *
2099 * Yields SAT-specified ATA VPD page.
2100 *
2101 * LOCKING:
2102 * spin_lock_irqsave(host lock)
2103 */
87340e98 2104static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2105{
ad355b46 2106 struct ata_taskfile tf;
ad355b46 2107
ad355b46
JG		 2108 memset(&tf, 0, sizeof(tf));
2109
87340e98
TH		 2110 rbuf[1] = 0x89; /* our page code */
2111 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2112 rbuf[3] = (0x238 & 0xff);
ad355b46 2113
87340e98
TH		 2114 memcpy(&rbuf[8], "linux ", 8);
2115 memcpy(&rbuf[16], "libata ", 16);
2116 memcpy(&rbuf[32], DRV_VERSION, 4);
2117 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2118
2119 /* we don't store the ATA device signature, so we fake it */
2120
2121 tf.command = ATA_DRDY; /* really, this is Status reg */
2122 tf.lbal = 0x1;
2123 tf.nsect = 0x1;
2124
87340e98
TH		 2125 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2126 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2127
87340e98 2128 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2129
87340e98 2130 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2131 return 0;
2132}
2133
18f0f978
CH		 2134static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2135{
295124dc 2136 u16 min_io_sectors;
18f0f978
CH		 2137
2138 rbuf[1] = 0xb0;
2139 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2140
2141 /*
2142 * Optimal transfer length granularity.
2143 *
2144 * This is always one physical block, but for disks with a smaller
2145 * logical than physical sector size we need to figure out what the
2146 * latter is.
2147 */
295124dc 2148 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2149 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2150
2151 /*
2152 * Optimal unmap granularity.
2153 *
2154 * The ATA spec doesn't even know about a granularity or alignment
2155 * for the TRIM command. We can leave away most of the unmap related
2156 * VPD page entries, but we have specifify a granularity to signal
2157 * that we support some form of unmap - in thise case via WRITE SAME
2158 * with the unmap bit set.
2159 */
e78db4df 2160 if (ata_id_has_trim(args->id)) {
5f4e2066 2161 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
18f0f978 2162 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2163 }
18f0f978
CH		 2164
2165 return 0;
2166}
2167
1e9dbc92
MW		 2168static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2169{
4bca3286
MP		 2170 int form_factor = ata_id_form_factor(args->id);
2171 int media_rotation_rate = ata_id_rotation_rate(args->id);
2172
1e9dbc92
MW		 2173 rbuf[1] = 0xb1;
2174 rbuf[3] = 0x3c;
4bca3286
MP		 2175 rbuf[4] = media_rotation_rate >> 8;
2176 rbuf[5] = media_rotation_rate;
2177 rbuf[7] = form_factor;
1e9dbc92
MW		 2178
2179 return 0;
2180}
2181
02e0a604
MP		 2182static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2183{
2184 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2185 rbuf[1] = 0xb2;
2186 rbuf[3] = 0x4;
2187 rbuf[5] = 1 << 6; /* TPWS */
2188
2189 return 0;
2190}
2191
1da177e4 2192/**
0cba632b 2193 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2194 * @args: device IDENTIFY data / SCSI command of interest.
2195 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2196 *
2197 * No operation. Simply returns success to caller, to indicate
2198 * that the caller should successfully complete this SCSI command.
2199 *
2200 * LOCKING:
cca3974e 2201 * spin_lock_irqsave(host lock)
1da177e4 2202 */
87340e98 2203static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2204{
2205 VPRINTK("ENTER\n");
2206 return 0;
2207}
2208
6ca8e794
PB		 2209/**
2210 * modecpy - Prepare response for MODE SENSE
2211 * @dest: output buffer
2212 * @src: data being copied
2213 * @n: length of mode page
2214 * @changeable: whether changeable parameters are requested
2215 *
2216 * Generate a generic MODE SENSE page for either current or changeable
2217 * parameters.
2218 *
2219 * LOCKING:
2220 * None.
2221 */
2222static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2223{
2224 if (changeable) {
2225 memcpy(dest, src, 2);
2226 memset(dest + 2, 0, n - 2);
2227 } else {
2228 memcpy(dest, src, n);
2229 }
2230}
2231
1da177e4
LT		 2232/**
2233 * ata_msense_caching - Simulate MODE SENSE caching info page
2234 * @id: device IDENTIFY data
87340e98 2235 * @buf: output buffer
6ca8e794 2236 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2237 *
2238 * Generate a caching info page, which conditionally indicates
2239 * write caching to the SCSI layer, depending on device
2240 * capabilities.
2241 *
2242 * LOCKING:
2243 * None.
2244 */
6ca8e794 2245static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
1da177e4 2246{
6ca8e794 2247 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
1b26d29c 2248 if (changeable || ata_id_wcache_enabled(id))
87340e98 2249 buf[2] |= (1 << 2); /* write cache enable */
6ca8e794 2250 if (!changeable && !ata_id_rahead_enabled(id))
87340e98
TH		 2251 buf[12] |= (1 << 5); /* disable read ahead */
2252 return sizeof(def_cache_mpage);
1da177e4
LT		 2253}
2254
2255/**
2256 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2257 * @buf: output buffer
6ca8e794 2258 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2259 *
2260 * Generate a generic MODE SENSE control mode page.
2261 *
2262 * LOCKING:
2263 * None.
2264 */
6ca8e794 2265static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
1da177e4 2266{
6ca8e794 2267 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
00ac37f5 2268 return sizeof(def_control_mpage);
1da177e4
LT		 2269}
2270
2271/**
2272 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2273 * @buf: output buffer
6ca8e794 2274 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2275 *
2276 * Generate a generic MODE SENSE r/w error recovery page.
2277 *
2278 * LOCKING:
2279 * None.
2280 */
6ca8e794 2281static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
1da177e4 2282{
6ca8e794
PB		 2283 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2284 changeable);
00ac37f5 2285 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2286}
2287
48bdc8ec
JA		 2288/*
2289 * We can turn this into a real blacklist if it's needed, for now just
2290 * blacklist any Maxtor BANC1G10 revision firmware
2291 */
2292static int ata_dev_supports_fua(u16 *id)
2293{
a0cf733b 2294 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2295
c3c013a2
JG		 2296 if (!libata_fua)
2297 return 0;
48bdc8ec
JA		 2298 if (!ata_id_has_fua(id))
2299 return 0;
2300
a0cf733b
TH		 2301 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2302 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2303
2e02671d 2304 if (strcmp(model, "Maxtor"))
48bdc8ec 2305 return 1;
2e02671d 2306 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2307 return 1;
2308
2309 return 0; /* blacklisted */
2310}
2311
1da177e4
LT		 2312/**
2313 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2314 * @args: device IDENTIFY data / SCSI command of interest.
2315 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2316 *
00ac37f5
DG		 2317 * Simulate MODE SENSE commands. Assume this is invoked for direct
2318 * access devices (e.g. disks) only. There should be no block
2319 * descriptor for other device types.
1da177e4
LT		 2320 *
2321 * LOCKING:
cca3974e 2322 * spin_lock_irqsave(host lock)
1da177e4 2323 */
87340e98 2324static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2325{
9a3dccc4 2326 struct ata_device *dev = args->dev;
87340e98 2327 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2328 const u8 sat_blk_desc[] = {
2329 0, 0, 0, 0, /* number of blocks: sat unspecified */
2330 0,
2331 0, 0x2, 0x0 /* block length: 512 bytes */
2332 };
2333 u8 pg, spg;
87340e98 2334 unsigned int ebd, page_control, six_byte;
9a3dccc4 2335 u8 dpofua;
1da177e4
LT		 2336
2337 VPRINTK("ENTER\n");
2338
2339 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2340 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2341 /*
2342 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2343 */
00ac37f5 2344
1da177e4 2345 page_control = scsicmd[2] >> 6;
ae006510
DG		 2346 switch (page_control) {
2347 case 0: /* current */
6ca8e794
PB		 2348 case 1: /* changeable */
2349 case 2: /* defaults */
ae006510
DG		 2350 break; /* supported */
2351 case 3: /* saved */
2352 goto saving_not_supp;
ae006510
DG		 2353 default:
2354 goto invalid_fld;
2355 }
1da177e4 2356
87340e98
TH		 2357 if (six_byte)
2358 p += 4 + (ebd ? 8 : 0);
2359 else
2360 p += 8 + (ebd ? 8 : 0);
1da177e4 2361
00ac37f5
DG		 2362 pg = scsicmd[2] & 0x3f;
2363 spg = scsicmd[3];
2364 /*
2365 * No mode subpages supported (yet) but asking for _all_
2366 * subpages may be valid
2367 */
2368 if (spg && (spg != ALL_SUB_MPAGES))
2369 goto invalid_fld;
2370
2371 switch(pg) {
2372 case RW_RECOVERY_MPAGE:
6ca8e794 2373 p += ata_msense_rw_recovery(p, page_control == 1);
1da177e4
LT		 2374 break;
2375
00ac37f5 2376 case CACHE_MPAGE:
6ca8e794 2377 p += ata_msense_caching(args->id, p, page_control == 1);
1da177e4
LT		 2378 break;
2379
87340e98 2380 case CONTROL_MPAGE:
6ca8e794 2381 p += ata_msense_ctl_mode(p, page_control == 1);
1da177e4 2382 break;
1da177e4 2383
00ac37f5 2384 case ALL_MPAGES:
6ca8e794
PB		 2385 p += ata_msense_rw_recovery(p, page_control == 1);
2386 p += ata_msense_caching(args->id, p, page_control == 1);
2387 p += ata_msense_ctl_mode(p, page_control == 1);
1da177e4
LT		 2388 break;
2389
2390 default: /* invalid page code */
ae006510 2391 goto invalid_fld;
1da177e4
LT		 2392 }
2393
9a3dccc4 2394 dpofua = 0;
f79d409f 2395 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2396 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2397 dpofua = 1 << 4;
2398
1da177e4 2399 if (six_byte) {
87340e98
TH		 2400 rbuf[0] = p - rbuf - 1;
2401 rbuf[2] |= dpofua;
00ac37f5 2402 if (ebd) {
87340e98
TH		 2403 rbuf[3] = sizeof(sat_blk_desc);
2404 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2405 }
1da177e4 2406 } else {
87340e98
TH		 2407 unsigned int output_len = p - rbuf - 2;
2408
1da177e4 2409 rbuf[0] = output_len >> 8;
87340e98
TH		 2410 rbuf[1] = output_len;
2411 rbuf[3] |= dpofua;
00ac37f5 2412 if (ebd) {
87340e98
TH		 2413 rbuf[7] = sizeof(sat_blk_desc);
2414 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2415 }
1da177e4 2416 }
1da177e4 2417 return 0;
ae006510
DG		 2418
2419invalid_fld:
2420 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2421 /* "Invalid field in cbd" */
2422 return 1;
2423
2424saving_not_supp:
2425 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2426 /* "Saving parameters not supported" */
2427 return 1;
1da177e4
LT		 2428}
2429
2430/**
2431 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2432 * @args: device IDENTIFY data / SCSI command of interest.
2433 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2434 *
2435 * Simulate READ CAPACITY commands.
2436 *
2437 * LOCKING:
6a36261e 2438 * None.
1da177e4 2439 */
87340e98 2440static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2441{
61d79a8e
MP		 2442 struct ata_device *dev = args->dev;
2443 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2444 u32 sector_size; /* physical sector size in bytes */
2445 u8 log2_per_phys;
2446 u16 lowest_aligned;
2447
2448 sector_size = ata_id_logical_sector_size(dev->id);
2449 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2450 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2451
2452 VPRINTK("ENTER\n");
2453
1da177e4 2454 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2455 if (last_lba >= 0xffffffffULL)
2456 last_lba = 0xffffffff;
0c144d0d 2457
1da177e4 2458 /* sector count, 32-bit */
87340e98
TH		 2459 rbuf[0] = last_lba >> (8 * 3);
2460 rbuf[1] = last_lba >> (8 * 2);
2461 rbuf[2] = last_lba >> (8 * 1);
2462 rbuf[3] = last_lba;
1da177e4
LT		 2463
2464 /* sector size */
295124dc
GG		 2465 rbuf[4] = sector_size >> (8 * 3);
2466 rbuf[5] = sector_size >> (8 * 2);
2467 rbuf[6] = sector_size >> (8 * 1);
2468 rbuf[7] = sector_size;
1da177e4
LT		 2469 } else {
2470 /* sector count, 64-bit */
87340e98
TH		 2471 rbuf[0] = last_lba >> (8 * 7);
2472 rbuf[1] = last_lba >> (8 * 6);
2473 rbuf[2] = last_lba >> (8 * 5);
2474 rbuf[3] = last_lba >> (8 * 4);
2475 rbuf[4] = last_lba >> (8 * 3);
2476 rbuf[5] = last_lba >> (8 * 2);
2477 rbuf[6] = last_lba >> (8 * 1);
2478 rbuf[7] = last_lba;
1da177e4
LT		 2479
2480 /* sector size */
295124dc
GG		 2481 rbuf[ 8] = sector_size >> (8 * 3);
2482 rbuf[ 9] = sector_size >> (8 * 2);
2483 rbuf[10] = sector_size >> (8 * 1);
2484 rbuf[11] = sector_size;
61d79a8e
MP		 2485
2486 rbuf[12] = 0;
295124dc 2487 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2488 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2489 rbuf[15] = lowest_aligned;
18f0f978 2490
e78db4df
MP		 2491 if (ata_id_has_trim(args->id)) {
2492 rbuf[14] |= 0x80; /* TPE */
2493
2494 if (ata_id_has_zero_after_trim(args->id))
2495 rbuf[14] |= 0x40; /* TPRZ */
2496 }
1da177e4
LT		 2497 }
2498
2499 return 0;
2500}
2501
2502/**
2503 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2504 * @args: device IDENTIFY data / SCSI command of interest.
2505 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2506 *
2507 * Simulate REPORT LUNS command.
2508 *
2509 * LOCKING:
cca3974e 2510 * spin_lock_irqsave(host lock)
1da177e4 2511 */
87340e98 2512static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2513{
2514 VPRINTK("ENTER\n");
2515 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2516
2517 return 0;
2518}
2519
77853bf2 2520static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2521{
74e6c8c3 2522 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2523 /* FIXME: not quite right; we don't want the
2524 * translation of taskfile registers into
2525 * a sense descriptors, since that's only
2526 * correct for ATA, not ATAPI
2527 */
750426aa 2528 ata_gen_passthru_sense(qc);
74e6c8c3 2529 }
a939c963 2530
c6e6e666 2531 qc->scsidone(qc->scsicmd);
77853bf2 2532 ata_qc_free(qc);
c6e6e666 2533}
a939c963 2534
c6e6e666
JG		 2535/* is it pointless to prefer PIO for "safety reasons"? */
2536static inline int ata_pio_use_silly(struct ata_port *ap)
2537{
2538 return (ap->flags & ATA_FLAG_PIO_DMA);
2539}
2540
2541static void atapi_request_sense(struct ata_queued_cmd *qc)
2542{
2543 struct ata_port *ap = qc->ap;
2544 struct scsi_cmnd *cmd = qc->scsicmd;
2545
2546 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2547
2548 /* FIXME: is this needed? */
7ccd720d 2549 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2550
127102ae 2551#ifdef CONFIG_ATA_SFF
855d854a
JB		 2552 if (ap->ops->sff_tf_read)
2553 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2554#endif
c6e6e666
JG		 2555
2556 /* fill these in, for the case where they are -not- overwritten */
2557 cmd->sense_buffer[0] = 0x70;
2558 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2559
2560 ata_qc_reinit(qc);
2561
93f8fecb 2562 /* setup sg table and init transfer direction */
cadb7345 2563 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2564 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2565 qc->dma_dir = DMA_FROM_DEVICE;
2566
6e7846e9 2567 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2568 qc->cdb[0] = REQUEST_SENSE;
2569 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2570
2571 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2572 qc->tf.command = ATA_CMD_PACKET;
2573
c6e6e666 2574 if (ata_pio_use_silly(ap)) {
0dc36888 2575 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2576 qc->tf.feature |= ATAPI_PKT_DMA;
2577 } else {
0dc36888 2578 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2579 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2580 qc->tf.lbah = 0;
c6e6e666 2581 }
a939c963
JG		 2582 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2583
c6e6e666 2584 qc->complete_fn = atapi_sense_complete;
a939c963 2585
8e0e694a 2586 ata_qc_issue(qc);
a939c963
JG		 2587
2588 DPRINTK("EXIT\n");
2589}
2590
77853bf2 2591static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2592{
2593 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2594 unsigned int err_mask = qc->err_mask;
1da177e4 2595
a7dac447 2596 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2597
246619da
TH		 2598 /* handle completion from new EH */
2599 if (unlikely(qc->ap->ops->error_handler &&
2600 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2601
2602 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2603 /* FIXME: not quite right; we don't want the
2604 * translation of taskfile registers into a
2605 * sense descriptors, since that's only
2606 * correct for ATA, not ATAPI
2607 */
750426aa 2608 ata_gen_passthru_sense(qc);
246619da
TH		 2609 }
2610
22aac089
TH		 2611 /* SCSI EH automatically locks door if sdev->locked is
2612 * set. Sometimes door lock request continues to
2613 * fail, for example, when no media is present. This
2614 * creates a loop - SCSI EH issues door lock which
2615 * fails and gets invoked again to acquire sense data
2616 * for the failed command.
2617 *
2618 * If door lock fails, always clear sdev->locked to
2619 * avoid this infinite loop.
2a5f07b5
TH		 2620 *
2621 * This may happen before SCSI scan is complete. Make
2622 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2623 */
2a5f07b5 2624 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2625 qc->dev->sdev->locked = 0;
2626
246619da
TH		 2627 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2628 qc->scsidone(cmd);
2629 ata_qc_free(qc);
2630 return;
2631 }
2632
2633 /* successful completion or old EH failure path */
a7dac447 2634 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2635 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2636 atapi_request_sense(qc);
77853bf2 2637 return;
74e6c8c3 2638 } else if (unlikely(err_mask)) {
a7dac447
JG		 2639 /* FIXME: not quite right; we don't want the
2640 * translation of taskfile registers into
2641 * a sense descriptors, since that's only
2642 * correct for ATA, not ATAPI
2643 */
750426aa 2644 ata_gen_passthru_sense(qc);
74e6c8c3 2645 } else {
1da177e4
LT		 2646 u8 *scsicmd = cmd->cmnd;
2647
fd71da46 2648 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2649 unsigned long flags;
87340e98 2650 u8 *buf;
b445c568 2651
87340e98 2652 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2653
2654 /* ATAPI devices typically report zero for their SCSI version,
2655 * and sometimes deviate from the spec WRT response data
2656 * format. If SCSI version is reported as zero like normal,
2657 * then we make the following fixups: 1) Fake MMC-5 version,
2658 * to indicate to the Linux scsi midlayer this is a modern
2659 * device. 2) Ensure response data format / ATAPI information
2660 * are always correct.
a15dbeb4
JG		 2661 */
2662 if (buf[2] == 0) {
2663 buf[2] = 0x5;
2664 buf[3] = 0x32;
2665 }
2666
87340e98 2667 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2668 }
a15dbeb4 2669
1da177e4
LT		 2670 cmd->result = SAM_STAT_GOOD;
2671 }
2672
2673 qc->scsidone(cmd);
77853bf2 2674 ata_qc_free(qc);
1da177e4
LT		 2675}
2676/**
2677 * atapi_xlat - Initialize PACKET taskfile
2678 * @qc: command structure to be initialized
1da177e4
LT		 2679 *
2680 * LOCKING:
cca3974e 2681 * spin_lock_irqsave(host lock)
1da177e4
LT		 2682 *
2683 * RETURNS:
2684 * Zero on success, non-zero on failure.
2685 */
ad706991 2686static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2687{
542b1444 2688 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2689 struct ata_device *dev = qc->dev;
542b1444 2690 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2691 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2692 unsigned int nbytes;
1da177e4 2693
2e5704f6
TH		 2694 memset(qc->cdb, 0, dev->cdb_len);
2695 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2696
2697 qc->complete_fn = atapi_qc_complete;
2698
2699 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2700 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2701 qc->tf.flags |= ATA_TFLAG_WRITE;
2702 DPRINTK("direction: write\n");
2703 }
2704
2705 qc->tf.command = ATA_CMD_PACKET;
aacda375 2706 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2707
2708 /* check whether ATAPI DMA is safe */
5895ef9a 2709 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2710 using_pio = 1;
1da177e4 2711
e190222d
TH		 2712 /* Some controller variants snoop this value for Packet
2713 * transfers to do state machine and FIFO management. Thus we
2714 * want to set it properly, and for DMA where it is
2715 * effectively meaningless.
2716 */
aacda375 2717 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2718
e190222d
TH		 2719 /* Most ATAPI devices which honor transfer chunk size don't
2720 * behave according to the spec when odd chunk size which
2721 * matches the transfer length is specified. If the number of
2722 * bytes to transfer is 2n+1. According to the spec, what
2723 * should happen is to indicate that 2n+1 is going to be
2724 * transferred and transfer 2n+2 bytes where the last byte is
2725 * padding.
2726 *
2727 * In practice, this doesn't happen. ATAPI devices first
2728 * indicate and transfer 2n bytes and then indicate and
2729 * transfer 2 bytes where the last byte is padding.
2730 *
2731 * This inconsistency confuses several controllers which
2732 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2733 * These controllers use actual number of transferred bytes to
2734 * update DMA poitner and transfer of 4n+2 bytes make those
2735 * controller push DMA pointer by 4n+4 bytes because SATA data
2736 * FISes are aligned to 4 bytes. This causes data corruption
2737 * and buffer overrun.
2738 *
2739 * Always setting nbytes to even number solves this problem
2740 * because then ATAPI devices don't have to split data at 2n
2741 * boundaries.
2742 */
2743 if (nbytes & 0x1)
2744 nbytes++;
2745
2db78dd3
AC		 2746 qc->tf.lbam = (nbytes & 0xFF);
2747 qc->tf.lbah = (nbytes >> 8);
2748
5895ef9a
TH		 2749 if (nodata)
2750 qc->tf.protocol = ATAPI_PROT_NODATA;
2751 else if (using_pio)
2752 qc->tf.protocol = ATAPI_PROT_PIO;
2753 else {
e00f1ff3 2754 /* DMA data xfer */
0dc36888 2755 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2756 qc->tf.feature |= ATAPI_PKT_DMA;
2757
91163006
TH		 2758 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2759 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2760 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2761 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2762 }
2763
2db78dd3
AC		 2764
2765 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2766 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2767 return 0;
2768}
2769
2dcb407e 2770static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2771{
071f44b1 2772 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2773 if (likely(devno < ata_link_max_devices(&ap->link)))
2774 return &ap->link.device[devno];
2775 } else {
2776 if (likely(devno < ap->nr_pmp_links))
2777 return &ap->pmp_link[devno].device[0];
2778 }
2779
ab5b3a5b
TH		 2780 return NULL;
2781}
2782
2dcb407e
JG		 2783static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2784 const struct scsi_device *scsidev)
ab5b3a5b 2785{
41bda9c9
TH		 2786 int devno;
2787
ab5b3a5b 2788 /* skip commands not addressed to targets we simulate */
071f44b1 2789 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2790 if (unlikely(scsidev->channel || scsidev->lun))
2791 return NULL;
2792 devno = scsidev->id;
2793 } else {
2794 if (unlikely(scsidev->id || scsidev->lun))
2795 return NULL;
2796 devno = scsidev->channel;
2797 }
ab5b3a5b 2798
41bda9c9 2799 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2800}
2801
1da177e4
LT		 2802/**
2803 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2804 * @ap: ATA port to which the device is attached
2805 * @scsidev: SCSI device from which we derive the ATA device
2806 *
2807 * Given various information provided in struct scsi_cmnd,
2808 * map that onto an ATA bus, and using that mapping
2809 * determine which ata_device is associated with the
2810 * SCSI command to be sent.
2811 *
2812 * LOCKING:
cca3974e 2813 * spin_lock_irqsave(host lock)
1da177e4
LT		 2814 *
2815 * RETURNS:
2816 * Associated ATA device, or %NULL if not found.
2817 */
1da177e4 2818static struct ata_device *
057ace5e 2819ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2820{
ab5b3a5b 2821 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2822
2486fa56 2823 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2824 return NULL;
2825
1da177e4
LT		 2826 return dev;
2827}
2828
b095518e
JG		 2829/*
2830 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2831 * @byte1: Byte 1 from pass-thru CDB.
2832 *
2833 * RETURNS:
2834 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2835 */
2836static u8
2837ata_scsi_map_proto(u8 byte1)
2838{
2839 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2840 case 3: /* Non-data */
2841 return ATA_PROT_NODATA;
2842
2843 case 6: /* DMA */
2844 case 10: /* UDMA Data-in */
2845 case 11: /* UDMA Data-Out */
2846 return ATA_PROT_DMA;
2847
2848 case 4: /* PIO Data-in */
2849 case 5: /* PIO Data-out */
2850 return ATA_PROT_PIO;
2851
2852 case 0: /* Hard Reset */
2853 case 1: /* SRST */
2854 case 8: /* Device Diagnostic */
2855 case 9: /* Device Reset */
2856 case 7: /* DMA Queued */
2857 case 12: /* FPDMA */
2858 case 15: /* Return Response Info */
2859 default: /* Reserved */
2860 break;
b095518e
JG		 2861 }
2862
2863 return ATA_PROT_UNKNOWN;
2864}
2865
2866/**
2867 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2868 * @qc: command structure to be initialized
b095518e
JG		 2869 *
2870 * Handles either 12 or 16-byte versions of the CDB.
2871 *
2872 * RETURNS:
2873 * Zero on success, non-zero on failure.
2874 */
ad706991 2875static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2876{
2877 struct ata_taskfile *tf = &(qc->tf);
542b1444 2878 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2879 struct ata_device *dev = qc->dev;
ad706991 2880 const u8 *cdb = scmd->cmnd;
b095518e 2881
542b1444 2882 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2883 goto invalid_fld;
8190bdb9 2884
b095518e
JG		 2885 /*
2886 * 12 and 16 byte CDBs use different offsets to
2887 * provide the various register values.
2888 */
542b1444 2889 if (cdb[0] == ATA_16) {
b095518e
JG		 2890 /*
2891 * 16-byte CDB - may contain extended commands.
2892 *
2893 * If that is the case, copy the upper byte register values.
2894 */
542b1444
TH		 2895 if (cdb[1] & 0x01) {
2896 tf->hob_feature = cdb[3];
2897 tf->hob_nsect = cdb[5];
2898 tf->hob_lbal = cdb[7];
2899 tf->hob_lbam = cdb[9];
2900 tf->hob_lbah = cdb[11];
b095518e
JG		 2901 tf->flags |= ATA_TFLAG_LBA48;
2902 } else
2903 tf->flags &= ~ATA_TFLAG_LBA48;
2904
2905 /*
2906 * Always copy low byte, device and command registers.
2907 */
542b1444
TH		 2908 tf->feature = cdb[4];
2909 tf->nsect = cdb[6];
2910 tf->lbal = cdb[8];
2911 tf->lbam = cdb[10];
2912 tf->lbah = cdb[12];
2913 tf->device = cdb[13];
2914 tf->command = cdb[14];
b095518e
JG		 2915 } else {
2916 /*
2917 * 12-byte CDB - incapable of extended commands.
2918 */
2919 tf->flags &= ~ATA_TFLAG_LBA48;
2920
542b1444
TH		 2921 tf->feature = cdb[3];
2922 tf->nsect = cdb[4];
2923 tf->lbal = cdb[5];
2924 tf->lbam = cdb[6];
2925 tf->lbah = cdb[7];
2926 tf->device = cdb[8];
2927 tf->command = cdb[9];
b095518e 2928 }
fa4453c4
AL		 2929
2930 /* enforce correct master/slave bit */
2931 tf->device = dev->devno ?
2932 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2933
bd30add8 2934 switch (tf->command) {
295124dc 2935 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 2936 case ATA_CMD_READ_LONG:
2937 case ATA_CMD_READ_LONG_ONCE:
2938 case ATA_CMD_WRITE_LONG:
2939 case ATA_CMD_WRITE_LONG_ONCE:
2940 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2941 goto invalid_fld;
2942 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 2943 break;
2944
2945 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2946 case ATA_CMD_CFA_WRITE_NE:
2947 case ATA_CMD_CFA_TRANS_SECT:
2948 case ATA_CMD_CFA_WRITE_MULT_NE:
2949 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2950 case ATA_CMD_READ:
2951 case ATA_CMD_READ_EXT:
2952 case ATA_CMD_READ_QUEUED:
2953 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2954 case ATA_CMD_FPDMA_READ:
2955 case ATA_CMD_READ_MULTI:
2956 case ATA_CMD_READ_MULTI_EXT:
2957 case ATA_CMD_PIO_READ:
2958 case ATA_CMD_PIO_READ_EXT:
2959 case ATA_CMD_READ_STREAM_DMA_EXT:
2960 case ATA_CMD_READ_STREAM_EXT:
2961 case ATA_CMD_VERIFY:
2962 case ATA_CMD_VERIFY_EXT:
2963 case ATA_CMD_WRITE:
2964 case ATA_CMD_WRITE_EXT:
2965 case ATA_CMD_WRITE_FUA_EXT:
2966 case ATA_CMD_WRITE_QUEUED:
2967 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2968 case ATA_CMD_FPDMA_WRITE:
2969 case ATA_CMD_WRITE_MULTI:
2970 case ATA_CMD_WRITE_MULTI_EXT:
2971 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2972 case ATA_CMD_PIO_WRITE:
2973 case ATA_CMD_PIO_WRITE_EXT:
2974 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2975 case ATA_CMD_WRITE_STREAM_EXT:
2976 qc->sect_size = scmd->device->sector_size;
2977 break;
2978
2979 /* Everything else uses 512 byte "sectors" */
2980 default:
2981 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 2982 }
2983
2984 /*
2985 * Set flags so that all registers will be written, pass on
2986 * write indication (used for PIO/DMA setup), result TF is
2987 * copied back and we don't whine too much about its failure.
2988 */
bc496ed0 2989 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 2990 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2991 tf->flags |= ATA_TFLAG_WRITE;
2992
2993 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2994
2995 /*
2996 * Set transfer length.
2997 *
2998 * TODO: find out if we need to do more here to
2999 * cover scatter/gather case.
3000 */
3001 ata_qc_set_pc_nbytes(qc);
3002
3003 /* We may not issue DMA commands if no DMA mode is set */
3004 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3005 goto invalid_fld;
3006
1dce589c
AL		 3007 /* sanity check for pio multi commands */
3008 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3009 goto invalid_fld;
3010
3011 if (is_multi_taskfile(tf)) {
3012 unsigned int multi_count = 1 << (cdb[1] >> 5);
3013
3014 /* compare the passed through multi_count
3015 * with the cached multi_count of libata
3016 */
3017 if (multi_count != dev->multi_count)
a9a79dfe
JP		 3018 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3019 multi_count);
d26fc955 3020 }
1dce589c 3021
b095518e
JG		 3022 /*
3023 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3024 * SET_FEATURES - XFER MODE must be preceded/succeeded
3025 * by an update to hardware-specific registers for each
3026 * controller (i.e. the reason for ->set_piomode(),
3027 * ->set_dmamode(), and ->post_set_mode() hooks).
3028 */
bd30add8
TH		 3029 if (tf->command == ATA_CMD_SET_FEATURES &&
3030 tf->feature == SETFEATURES_XFER)
9a405257 3031 goto invalid_fld;
b095518e
JG		 3032
3033 /*
bd30add8
TH		 3034 * Filter TPM commands by default. These provide an
3035 * essentially uncontrolled encrypted "back door" between
3036 * applications and the disk. Set libata.allow_tpm=1 if you
3037 * have a real reason for wanting to use them. This ensures
3038 * that installed software cannot easily mess stuff up without
3039 * user intent. DVR type users will probably ship with this enabled
3040 * for movie content management.
b095518e 3041 *
bd30add8
TH		 3042 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3043 * for this and should do in future but that it is not sufficient as
3044 * DCS is an optional feature set. Thus we also do the software filter
3045 * so that we comply with the TC consortium stated goal that the user
3046 * can turn off TC features of their system.
b095518e 3047 */
bd30add8
TH		 3048 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3049 goto invalid_fld;
e61e0672 3050
b095518e 3051 return 0;
9a405257
TH		 3052
3053 invalid_fld:
542b1444 3054 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 3055 /* "Invalid field in cdb" */
3056 return 1;
b095518e
JG		 3057}
3058
18f0f978
CH		 3059static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3060{
3061 struct ata_taskfile *tf = &qc->tf;
3062 struct scsi_cmnd *scmd = qc->scsicmd;
3063 struct ata_device *dev = qc->dev;
3064 const u8 *cdb = scmd->cmnd;
3065 u64 block;
3066 u32 n_block;
3067 u32 size;
3068 void *buf;
3069
3070 /* we may not issue DMA commands if no DMA mode is set */
3071 if (unlikely(!dev->dma_mode))
3072 goto invalid_fld;
3073
3074 if (unlikely(scmd->cmd_len < 16))
3075 goto invalid_fld;
3076 scsi_16_lba_len(cdb, &block, &n_block);
3077
3078 /* for now we only support WRITE SAME with the unmap bit set */
3079 if (unlikely(!(cdb[1] & 0x8)))
3080 goto invalid_fld;
3081
3082 /*
3083 * WRITE SAME always has a sector sized buffer as payload, this
3084 * should never be a multiple entry S/G list.
3085 */
3086 if (!scsi_sg_count(scmd))
3087 goto invalid_fld;
3088
3089 buf = page_address(sg_page(scsi_sglist(scmd)));
d0634c4a 3090 size = ata_set_lba_range_entries(buf, 512, block, n_block);
18f0f978
CH		 3091
3092 tf->protocol = ATA_PROT_DMA;
3093 tf->hob_feature = 0;
3094 tf->feature = ATA_DSM_TRIM;
3095 tf->hob_nsect = (size / 512) >> 8;
3096 tf->nsect = size / 512;
3097 tf->command = ATA_CMD_DSM;
3098 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3099 ATA_TFLAG_WRITE;
3100
3101 ata_qc_set_pc_nbytes(qc);
3102
3103 return 0;
3104
3105 invalid_fld:
3106 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3107 /* "Invalid field in cdb" */
3108 return 1;
3109}
3110
1b26d29c
PB		 3111/**
3112 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3113 * @qc: Storage for translated ATA taskfile
3114 * @buf: input buffer
3115 * @len: number of valid bytes in the input buffer
3116 *
3117 * Prepare a taskfile to modify caching information for the device.
3118 *
3119 * LOCKING:
3120 * None.
3121 */
3122static int ata_mselect_caching(struct ata_queued_cmd *qc,
3123 const u8 *buf, int len)
3124{
3125 struct ata_taskfile *tf = &qc->tf;
3126 struct ata_device *dev = qc->dev;
3127 char mpage[CACHE_MPAGE_LEN];
3128 u8 wce;
3129
3130 /*
3131 * The first two bytes of def_cache_mpage are a header, so offsets
3132 * in mpage are off by 2 compared to buf. Same for len.
3133 */
3134
3135 if (len != CACHE_MPAGE_LEN - 2)
3136 return -EINVAL;
3137
3138 wce = buf[0] & (1 << 2);
3139
3140 /*
3141 * Check that read-only bits are not modified.
3142 */
3143 ata_msense_caching(dev->id, mpage, false);
3144 mpage[2] &= ~(1 << 2);
3145 mpage[2] |= wce;
3146 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3147 return -EINVAL;
3148
3149 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3150 tf->protocol = ATA_PROT_NODATA;
3151 tf->nsect = 0;
3152 tf->command = ATA_CMD_SET_FEATURES;
3153 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3154 return 0;
3155}
3156
3157/**
3158 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3159 * @qc: Storage for translated ATA taskfile
3160 *
3161 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3162 * Assume this is invoked for direct access devices (e.g. disks) only.
3163 * There should be no block descriptor for other device types.
3164 *
3165 * LOCKING:
3166 * spin_lock_irqsave(host lock)
3167 */
3168static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3169{
3170 struct scsi_cmnd *scmd = qc->scsicmd;
3171 const u8 *cdb = scmd->cmnd;
3172 const u8 *p;
3173 u8 pg, spg;
3174 unsigned six_byte, pg_len, hdr_len, bd_len;
3175 int len;
3176
3177 VPRINTK("ENTER\n");
3178
3179 six_byte = (cdb[0] == MODE_SELECT);
3180 if (six_byte) {
3181 if (scmd->cmd_len < 5)
3182 goto invalid_fld;
3183
3184 len = cdb[4];
3185 hdr_len = 4;
3186 } else {
3187 if (scmd->cmd_len < 9)
3188 goto invalid_fld;
3189
3190 len = (cdb[7] << 8) + cdb[8];
3191 hdr_len = 8;
3192 }
3193
3194 /* We only support PF=1, SP=0. */
3195 if ((cdb[1] & 0x11) != 0x10)
3196 goto invalid_fld;
3197
3198 /* Test early for possible overrun. */
3199 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3200 goto invalid_param_len;
3201
3202 p = page_address(sg_page(scsi_sglist(scmd)));
3203
3204 /* Move past header and block descriptors. */
3205 if (len < hdr_len)
3206 goto invalid_param_len;
3207
3208 if (six_byte)
3209 bd_len = p[3];
3210 else
3211 bd_len = (p[6] << 8) + p[7];
3212
3213 len -= hdr_len;
3214 p += hdr_len;
3215 if (len < bd_len)
3216 goto invalid_param_len;
3217 if (bd_len != 0 && bd_len != 8)
3218 goto invalid_param;
3219
3220 len -= bd_len;
3221 p += bd_len;
3222 if (len == 0)
3223 goto skip;
3224
3225 /* Parse both possible formats for the mode page headers. */
3226 pg = p[0] & 0x3f;
3227 if (p[0] & 0x40) {
3228 if (len < 4)
3229 goto invalid_param_len;
3230
3231 spg = p[1];
3232 pg_len = (p[2] << 8) | p[3];
3233 p += 4;
3234 len -= 4;
3235 } else {
3236 if (len < 2)
3237 goto invalid_param_len;
3238
3239 spg = 0;
3240 pg_len = p[1];
3241 p += 2;
3242 len -= 2;
3243 }
3244
3245 /*
3246 * No mode subpages supported (yet) but asking for _all_
3247 * subpages may be valid
3248 */
3249 if (spg && (spg != ALL_SUB_MPAGES))
3250 goto invalid_param;
3251 if (pg_len > len)
3252 goto invalid_param_len;
3253
3254 switch (pg) {
3255 case CACHE_MPAGE:
3256 if (ata_mselect_caching(qc, p, pg_len) < 0)
3257 goto invalid_param;
3258 break;
3259
3260 default: /* invalid page code */
3261 goto invalid_param;
3262 }
3263
3264 /*
3265 * Only one page has changeable data, so we only support setting one
3266 * page at a time.
3267 */
3268 if (len > pg_len)
3269 goto invalid_param;
3270
3271 return 0;
3272
3273 invalid_fld:
3274 /* "Invalid field in CDB" */
3275 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3276 return 1;
3277
3278 invalid_param:
3279 /* "Invalid field in parameter list" */
3280 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3281 return 1;
3282
3283 invalid_param_len:
3284 /* "Parameter list length error" */
3285 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3286 return 1;
3287
3288 skip:
3289 scmd->result = SAM_STAT_GOOD;
3290 return 1;
3291}
3292
1da177e4
LT		 3293/**
3294 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3295 * @dev: ATA device
3296 * @cmd: SCSI command opcode to consider
3297 *
3298 * Look up the SCSI command given, and determine whether the
3299 * SCSI command is to be translated or simulated.
3300 *
3301 * RETURNS:
3302 * Pointer to translation function if possible, %NULL if not.
3303 */
3304
3305static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3306{
3307 switch (cmd) {
3308 case READ_6:
3309 case READ_10:
3310 case READ_16:
3311
3312 case WRITE_6:
3313 case WRITE_10:
3314 case WRITE_16:
3315 return ata_scsi_rw_xlat;
3316
0cdd6eb7 3317 case WRITE_SAME_16:
18f0f978
CH		 3318 return ata_scsi_write_same_xlat;
3319
1da177e4
LT		 3320 case SYNCHRONIZE_CACHE:
3321 if (ata_try_flush_cache(dev))
3322 return ata_scsi_flush_xlat;
3323 break;
3324
3325 case VERIFY:
3326 case VERIFY_16:
3327 return ata_scsi_verify_xlat;
b095518e
JG		 3328
3329 case ATA_12:
3330 case ATA_16:
3331 return ata_scsi_pass_thru;
da61396d 3332
1b26d29c
PB		 3333 case MODE_SELECT:
3334 case MODE_SELECT_10:
3335 return ata_scsi_mode_select_xlat;
3336 break;
3337
972dcafb
DG		 3338 case START_STOP:
3339 return ata_scsi_start_stop_xlat;
1da177e4
LT		 3340 }
3341
3342 return NULL;
3343}
3344
3345/**
3346 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3347 * @ap: ATA port to which the command was being sent
3348 * @cmd: SCSI command to dump
3349 *
3350 * Prints the contents of a SCSI command via printk().
3351 */
3352
3353static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3354 struct scsi_cmnd *cmd)
3355{
3356#ifdef ATA_DEBUG
3357 struct scsi_device *scsidev = cmd->device;
3358 u8 *scsicmd = cmd->cmnd;
3359
3360 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 3361 ap->print_id,
1da177e4
LT		 3362 scsidev->channel, scsidev->id, scsidev->lun,
3363 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3364 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3365 scsicmd[8]);
3366#endif
3367}
3368
542b1444 3369static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 3370 struct ata_device *dev)
eb3f0f9c 3371{
baf4fdfa
ML		 3372 u8 scsi_op = scmd->cmnd[0];
3373 ata_xlat_func_t xlat_func;
2115ea94
TH		 3374 int rc = 0;
3375
eb3f0f9c 3376 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 3377 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3378 goto bad_cdb_len;
eb3f0f9c 3379
baf4fdfa
ML		 3380 xlat_func = ata_get_xlat_func(dev, scsi_op);
3381 } else {
3382 if (unlikely(!scmd->cmd_len))
3383 goto bad_cdb_len;
3384
3385 xlat_func = NULL;
3386 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3387 /* relay SCSI command to ATAPI device */
607126c2
ML		 3388 int len = COMMAND_SIZE(scsi_op);
3389 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3390 goto bad_cdb_len;
3391
3392 xlat_func = atapi_xlat;
3393 } else {
3394 /* ATA_16 passthru, treat as an ATA command */
3395 if (unlikely(scmd->cmd_len > 16))
3396 goto bad_cdb_len;
3397
3398 xlat_func = ata_get_xlat_func(dev, scsi_op);
3399 }
3400 }
3401
3402 if (xlat_func)
b27dcfb0 3403 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 3404 else
b27dcfb0 3405 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 3406
3407 return rc;
baf4fdfa
ML		 3408
3409 bad_cdb_len:
3410 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3411 scmd->cmd_len, scsi_op, dev->cdb_len);
3412 scmd->result = DID_ERROR << 16;
b27dcfb0 3413 scmd->scsi_done(scmd);
baf4fdfa 3414 return 0;
eb3f0f9c
BK		 3415}
3416
1da177e4
LT		 3417/**
3418 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 3419 * @shost: SCSI host of command to be sent
1da177e4 3420 * @cmd: SCSI command to be sent
1da177e4
LT		 3421 *
3422 * In some cases, this function translates SCSI commands into
3423 * ATA taskfiles, and queues the taskfiles to be sent to
3424 * hardware. In other cases, this function simulates a
3425 * SCSI device by evaluating and responding to certain
3426 * SCSI commands. This creates the overall effect of
3427 * ATA and ATAPI devices appearing as SCSI devices.
3428 *
3429 * LOCKING:
23e701e6 3430 * ATA host lock
1da177e4
LT		 3431 *
3432 * RETURNS:
2115ea94
TH		 3433 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3434 * 0 otherwise.
1da177e4 3435 */
23e701e6 3436int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 3437{
3438 struct ata_port *ap;
3439 struct ata_device *dev;
3440 struct scsi_device *scsidev = cmd->device;
2115ea94 3441 int rc = 0;
23e701e6 3442 unsigned long irq_flags;
1da177e4 3443
35bb94b1 3444 ap = ata_shost_to_port(shost);
005a5a06 3445
23e701e6 3446 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 3447
3448 ata_scsi_dump_cdb(ap, cmd);
3449
3450 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3451 if (likely(dev))
b27dcfb0 3452 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 3453 else {
1da177e4 3454 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 3455 cmd->scsi_done(cmd);
1da177e4
LT		 3456 }
3457
23e701e6
JG		 3458 spin_unlock_irqrestore(ap->lock, irq_flags);
3459
2115ea94 3460 return rc;
1da177e4
LT		 3461}
3462
3463/**
3464 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3465 * @dev: the target device
1da177e4 3466 * @cmd: SCSI command being sent to device.
1da177e4
LT		 3467 *
3468 * Interprets and directly executes a select list of SCSI commands
3469 * that can be handled internally.
3470 *
3471 * LOCKING:
cca3974e 3472 * spin_lock_irqsave(host lock)
1da177e4
LT		 3473 */
3474
b27dcfb0 3475void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 3476{
3477 struct ata_scsi_args args;
057ace5e 3478 const u8 *scsicmd = cmd->cmnd;
45394145 3479 u8 tmp8;
1da177e4 3480
9a3dccc4
TH		 3481 args.dev = dev;
3482 args.id = dev->id;
1da177e4 3483 args.cmd = cmd;
b27dcfb0 3484 args.done = cmd->scsi_done;
1da177e4
LT		 3485
3486 switch(scsicmd[0]) {
2dcb407e
JG		 3487 /* TODO: worth improving? */
3488 case FORMAT_UNIT:
b27dcfb0 3489 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3490 break;
3491
3492 case INQUIRY:
3493 if (scsicmd[1] & 2) /* is CmdDt set? */
b27dcfb0 3494 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3495 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3496 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3497 else switch (scsicmd[2]) {
3498 case 0x00:
3499 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3500 break;
2dcb407e
JG		 3501 case 0x80:
3502 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3503 break;
2dcb407e
JG		 3504 case 0x83:
3505 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3506 break;
2dcb407e
JG		 3507 case 0x89:
3508 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3509 break;
18f0f978
CH		 3510 case 0xb0:
3511 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3512 break;
1e9dbc92
MW		 3513 case 0xb1:
3514 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3515 break;
02e0a604
MP		 3516 case 0xb2:
3517 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3518 break;
2dcb407e 3519 default:
b27dcfb0 3520 ata_scsi_invalid_field(cmd);
1da177e4 3521 break;
2dcb407e
JG		 3522 }
3523 break;
3524
3525 case MODE_SENSE:
3526 case MODE_SENSE_10:
3527 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3528 break;
3529
2dcb407e
JG		 3530 case READ_CAPACITY:
3531 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3532 break;
3533
3534 case SERVICE_ACTION_IN:
3535 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3536 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 3537 else
b27dcfb0 3538 ata_scsi_invalid_field(cmd);
2dcb407e 3539 break;
1da177e4 3540
2dcb407e
JG		 3541 case REPORT_LUNS:
3542 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3543 break;
1da177e4 3544
2dcb407e
JG		 3545 case REQUEST_SENSE:
3546 ata_scsi_set_sense(cmd, 0, 0, 0);
3547 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 3548 cmd->scsi_done(cmd);
2dcb407e 3549 break;
1da177e4 3550
2dcb407e
JG		 3551 /* if we reach this, then writeback caching is disabled,
3552 * turning this into a no-op.
3553 */
3554 case SYNCHRONIZE_CACHE:
3555 /* fall through */
3556
3557 /* no-op's, complete with success */
3558 case REZERO_UNIT:
3559 case SEEK_6:
3560 case SEEK_10:
3561 case TEST_UNIT_READY:
3562 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3563 break;
45394145 3564
2dcb407e
JG		 3565 case SEND_DIAGNOSTIC:
3566 tmp8 = scsicmd[1] & ~(1 << 3);
3567 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3568 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 3569 else
b27dcfb0 3570 ata_scsi_invalid_field(cmd);
2dcb407e 3571 break;
1da177e4 3572
2dcb407e
JG		 3573 /* all other commands */
3574 default:
3575 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3576 /* "Invalid command operation code" */
b27dcfb0 3577 cmd->scsi_done(cmd);
2dcb407e 3578 break;
1da177e4
LT		 3579 }
3580}
3581
f3187195
TH		 3582int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3583{
3584 int i, rc;
3585
3586 for (i = 0; i < host->n_ports; i++) {
3587 struct ata_port *ap = host->ports[i];
3588 struct Scsi_Host *shost;
3589
3590 rc = -ENOMEM;
3591 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3592 if (!shost)
3593 goto err_alloc;
3594
9ee4f393 3595 shost->eh_noresume = 1;
f3187195
TH		 3596 *(struct ata_port **)&shost->hostdata[0] = ap;
3597 ap->scsi_host = shost;
3598
d9027470 3599 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 3600 shost->unique_id = ap->print_id;
3601 shost->max_id = 16;
3602 shost->max_lun = 1;
3603 shost->max_channel = 1;
3604 shost->max_cmd_len = 16;
3605
31cc23b3
TH		 3606 /* Schedule policy is determined by ->qc_defer()
3607 * callback and it needs to see every deferred qc.
3608 * Set host_blocked to 1 to prevent SCSI midlayer from
3609 * automatically deferring requests.
3610 */
3611 shost->max_host_blocked = 1;
3612
f8fc75dc
LM		 3613 rc = scsi_add_host_with_dma(ap->scsi_host,
3614 &ap->tdev, ap->host->dev);
f3187195
TH		 3615 if (rc)
3616 goto err_add;
3617 }
3618
3619 return 0;
3620
3621 err_add:
3622 scsi_host_put(host->ports[i]->scsi_host);
3623 err_alloc:
3624 while (--i >= 0) {
3625 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3626
3627 scsi_remove_host(shost);
3628 scsi_host_put(shost);
3629 }
3630 return rc;
3631}
3632
1ae46317 3633void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3634{
1ae46317
TH		 3635 int tries = 5;
3636 struct ata_device *last_failed_dev = NULL;
41bda9c9 3637 struct ata_link *link;
1ae46317 3638 struct ata_device *dev;
644dd0cc 3639
1ae46317 3640 repeat:
1eca4365
TH		 3641 ata_for_each_link(link, ap, EDGE) {
3642 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3643 struct scsi_device *sdev;
3644 int channel = 0, id = 0;
3edebac4 3645
1eca4365 3646 if (dev->sdev)
41bda9c9 3647 continue;
3f19ee8c 3648
41bda9c9
TH		 3649 if (ata_is_host_link(link))
3650 id = dev->devno;
3651 else
3652 channel = link->pmp;
3653
3654 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3655 NULL);
3656 if (!IS_ERR(sdev)) {
3657 dev->sdev = sdev;
3658 scsi_device_put(sdev);
3bd46600 3659 ata_acpi_bind(dev);
295124dc
GG		 3660 } else {
3661 dev->sdev = NULL;
41bda9c9 3662 }
3edebac4 3663 }
3f19ee8c 3664 }
1ae46317
TH		 3665
3666 /* If we scanned while EH was in progress or allocation
3667 * failure occurred, scan would have failed silently. Check
3668 * whether all devices are attached.
3669 */
1eca4365
TH		 3670 ata_for_each_link(link, ap, EDGE) {
3671 ata_for_each_dev(dev, link, ENABLED) {
3672 if (!dev->sdev)
41bda9c9
TH		 3673 goto exit_loop;
3674 }
1ae46317 3675 }
41bda9c9
TH		 3676 exit_loop:
3677 if (!link)
1ae46317
TH		 3678 return;
3679
3680 /* we're missing some SCSI devices */
3681 if (sync) {
3682 /* If caller requested synchrnous scan && we've made
3683 * any progress, sleep briefly and repeat.
3684 */
3685 if (dev != last_failed_dev) {
3686 msleep(100);
3687 last_failed_dev = dev;
3688 goto repeat;
3689 }
3690
3691 /* We might be failing to detect boot device, give it
3692 * a few more chances.
3693 */
3694 if (--tries) {
3695 msleep(100);
3696 goto repeat;
3697 }
3698
a9a79dfe
JP		 3699 ata_port_err(ap,
3700 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 3701 }
3702
ad72cf98 3703 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 3704 round_jiffies_relative(HZ));
644dd0cc 3705}
0ea035a3
TH		 3706
3707/**
3708 * ata_scsi_offline_dev - offline attached SCSI device
3709 * @dev: ATA device to offline attached SCSI device for
3710 *
3711 * This function is called from ata_eh_hotplug() and responsible
3712 * for taking the SCSI device attached to @dev offline. This
cca3974e 3713 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3714 * against clearing.
3715 *
3716 * LOCKING:
cca3974e 3717 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3718 *
3719 * RETURNS:
3720 * 1 if attached SCSI device exists, 0 otherwise.
3721 */
3722int ata_scsi_offline_dev(struct ata_device *dev)
3723{
3724 if (dev->sdev) {
3725 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3726 return 1;
3727 }
3728 return 0;
3729}
580b2102
TH		 3730
3731/**
3732 * ata_scsi_remove_dev - remove attached SCSI device
3733 * @dev: ATA device to remove attached SCSI device for
3734 *
3735 * This function is called from ata_eh_scsi_hotplug() and
3736 * responsible for removing the SCSI device attached to @dev.
3737 *
3738 * LOCKING:
3739 * Kernel thread context (may sleep).
3740 */
3741static void ata_scsi_remove_dev(struct ata_device *dev)
3742{
9af5c9c9 3743 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3744 struct scsi_device *sdev;
3745 unsigned long flags;
3746
3747 /* Alas, we need to grab scan_mutex to ensure SCSI device
3748 * state doesn't change underneath us and thus
3749 * scsi_device_get() always succeeds. The mutex locking can
3750 * be removed if there is __scsi_device_get() interface which
3751 * increments reference counts regardless of device state.
3752 */
cca3974e 3753 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3754 spin_lock_irqsave(ap->lock, flags);
580b2102 3755
3bd46600
LM		 3756 ata_acpi_unbind(dev);
3757
cca3974e 3758 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3759 sdev = dev->sdev;
3760 dev->sdev = NULL;
3761
3762 if (sdev) {
3763 /* If user initiated unplug races with us, sdev can go
cca3974e 3764 * away underneath us after the host lock and
580b2102
TH		 3765 * scan_mutex are released. Hold onto it.
3766 */
3767 if (scsi_device_get(sdev) == 0) {
3768 /* The following ensures the attached sdev is
3769 * offline on return from ata_scsi_offline_dev()
3770 * regardless it wins or loses the race
3771 * against this function.
3772 */
3773 scsi_device_set_state(sdev, SDEV_OFFLINE);
3774 } else {
3775 WARN_ON(1);
3776 sdev = NULL;
3777 }
3778 }
3779
ba6a1308 3780 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3781 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3782
3783 if (sdev) {
a9a79dfe
JP		 3784 ata_dev_info(dev, "detaching (SCSI %s)\n",
3785 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3786
3787 scsi_remove_device(sdev);
3788 scsi_device_put(sdev);
3789 }
3790}
3791
41bda9c9
TH		 3792static void ata_scsi_handle_link_detach(struct ata_link *link)
3793{
3794 struct ata_port *ap = link->ap;
3795 struct ata_device *dev;
3796
1eca4365 3797 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3798 unsigned long flags;
3799
3800 if (!(dev->flags & ATA_DFLAG_DETACHED))
3801 continue;
3802
3803 spin_lock_irqsave(ap->lock, flags);
3804 dev->flags &= ~ATA_DFLAG_DETACHED;
3805 spin_unlock_irqrestore(ap->lock, flags);
3806
3807 ata_scsi_remove_dev(dev);
3808 }
3809}
3810
2f294968
KCA		 3811/**
3812 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3813 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3814 *
3815 * Tell the block layer to send a media change notification
3816 * event.
3817 *
3818 * LOCKING:
854c73a2 3819 * spin_lock_irqsave(host lock)
2f294968 3820 */
854c73a2 3821void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3822{
854c73a2 3823 if (dev->sdev)
f26792d5
JG		 3824 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3825 GFP_ATOMIC);
2f294968 3826}
2f294968 3827
580b2102
TH		 3828/**
3829 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3830 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3831 *
3832 * Perform SCSI part of hotplug. It's executed from a separate
3833 * workqueue after EH completes. This is necessary because SCSI
3834 * hot plugging requires working EH and hot unplugging is
3835 * synchronized with hot plugging with a mutex.
3836 *
3837 * LOCKING:
3838 * Kernel thread context (may sleep).
3839 */
65f27f38 3840void ata_scsi_hotplug(struct work_struct *work)
580b2102 3841{
65f27f38
DH		 3842 struct ata_port *ap =
3843 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3844 int i;
580b2102 3845
b51e9e5d 3846 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3847 DPRINTK("ENTER/EXIT - unloading\n");
3848 return;
3849 }
3850
3851 DPRINTK("ENTER\n");
ad72cf98 3852 mutex_lock(&ap->scsi_scan_mutex);
580b2102 3853
41bda9c9
TH		 3854 /* Unplug detached devices. We cannot use link iterator here
3855 * because PMP links have to be scanned even if PMP is
3856 * currently not attached. Iterate manually.
3857 */
3858 ata_scsi_handle_link_detach(&ap->link);
3859 if (ap->pmp_link)
3860 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3861 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3862
3863 /* scan for new ones */
1ae46317 3864 ata_scsi_scan_host(ap, 0);
580b2102 3865
ad72cf98 3866 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 3867 DPRINTK("EXIT\n");
3868}
83c47bcb
TH		 3869
3870/**
3871 * ata_scsi_user_scan - indication for user-initiated bus scan
3872 * @shost: SCSI host to scan
3873 * @channel: Channel to scan
3874 * @id: ID to scan
3875 * @lun: LUN to scan
3876 *
3877 * This function is called when user explicitly requests bus
3878 * scan. Set probe pending flag and invoke EH.
3879 *
3880 * LOCKING:
3881 * SCSI layer (we don't care)
3882 *
3883 * RETURNS:
3884 * Zero.
3885 */
d9027470
GG		 3886int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3887 unsigned int id, unsigned int lun)
83c47bcb
TH		 3888{
3889 struct ata_port *ap = ata_shost_to_port(shost);
3890 unsigned long flags;
41bda9c9 3891 int devno, rc = 0;
83c47bcb
TH		 3892
3893 if (!ap->ops->error_handler)
3894 return -EOPNOTSUPP;
3895
41bda9c9 3896 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3897 return -EINVAL;
3898
071f44b1 3899 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3900 if (channel != SCAN_WILD_CARD && channel)
3901 return -EINVAL;
3902 devno = id;
3903 } else {
3904 if (id != SCAN_WILD_CARD && id)
3905 return -EINVAL;
3906 devno = channel;
3907 }
3908
ba6a1308 3909 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3910
41bda9c9
TH		 3911 if (devno == SCAN_WILD_CARD) {
3912 struct ata_link *link;
3913
1eca4365 3914 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3915 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3916 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3917 ehi->action |= ATA_EH_RESET;
41bda9c9 3918 }
83c47bcb 3919 } else {
41bda9c9 3920 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3921
3922 if (dev) {
41bda9c9 3923 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3924 ehi->probe_mask |= 1 << dev->devno;
cf480626 3925 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3926 } else
3927 rc = -EINVAL;
3928 }
3929
309afcb5 3930 if (rc == 0) {
83c47bcb 3931 ata_port_schedule_eh(ap);
309afcb5
TH		 3932 spin_unlock_irqrestore(ap->lock, flags);
3933 ata_port_wait_eh(ap);
3934 } else
3935 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3936
3937 return rc;
3938}
3057ac3c 3939
3940/**
d0171269 3941 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3942 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3943 *
d0171269 3944 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 3945 * libata need to propagate the changes to SCSI layer.
3057ac3c 3946 *
d0171269
TH		 3947 * LOCKING:
3948 * Kernel thread context (may sleep).
3057ac3c 3949 */
65f27f38 3950void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3951{
65f27f38
DH		 3952 struct ata_port *ap =
3953 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3954 struct ata_link *link;
f58229f8 3955 struct ata_device *dev;
f84e7e41 3956 unsigned long flags;
3057ac3c 3957
ad72cf98 3958 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 3959 spin_lock_irqsave(ap->lock, flags);
3960
1eca4365
TH		 3961 ata_for_each_link(link, ap, EDGE) {
3962 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3963 struct scsi_device *sdev = dev->sdev;
3057ac3c 3964
1eca4365 3965 if (!sdev)
41bda9c9
TH		 3966 continue;
3967 if (scsi_device_get(sdev))
3968 continue;
f84e7e41 3969
41bda9c9
TH		 3970 spin_unlock_irqrestore(ap->lock, flags);
3971 scsi_rescan_device(&(sdev->sdev_gendev));
3972 scsi_device_put(sdev);
3973 spin_lock_irqsave(ap->lock, flags);
3974 }
3057ac3c 3975 }
f84e7e41
TH		 3976
3977 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 3978 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 3979}
80289167
BK		 3980
3981/**
3982 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3983 * @host: ATA host container for all SAS ports
80289167 3984 * @port_info: Information from low-level host driver
cca3974e 3985 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3986 *
3987 * LOCKING:
3988 * PCI/etc. bus probe sem.
3989 *
3990 * RETURNS:
3991 * ata_port pointer on success / NULL on failure.
3992 */
3993
cca3974e 3994struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3995 struct ata_port_info *port_info,
cca3974e 3996 struct Scsi_Host *shost)
80289167 3997{
f3187195 3998 struct ata_port *ap;
80289167 3999
f3187195 4000 ap = ata_port_alloc(host);
80289167
BK		 4001 if (!ap)
4002 return NULL;
4003
f3187195 4004 ap->port_no = 0;
a29b5dad 4005 ap->lock = &host->lock;
f3187195
TH		 4006 ap->pio_mask = port_info->pio_mask;
4007 ap->mwdma_mask = port_info->mwdma_mask;
4008 ap->udma_mask = port_info->udma_mask;
4009 ap->flags |= port_info->flags;
4010 ap->ops = port_info->port_ops;
4011 ap->cbl = ATA_CBL_SATA;
4012
80289167
BK		 4013 return ap;
4014}
4015EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4016
4017/**
4018 * ata_sas_port_start - Set port up for dma.
4019 * @ap: Port to initialize
4020 *
4021 * Called just after data structures for each port are
dde20207 4022 * initialized.
80289167
BK		 4023 *
4024 * May be used as the port_start() entry in ata_port_operations.
4025 *
4026 * LOCKING:
4027 * Inherited from caller.
4028 */
4029int ata_sas_port_start(struct ata_port *ap)
4030{
3f1e046a
NA		 4031 /*
4032 * the port is marked as frozen at allocation time, but if we don't
4033 * have new eh, we won't thaw it
4034 */
4035 if (!ap->ops->error_handler)
4036 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 4037 return 0;
80289167
BK		 4038}
4039EXPORT_SYMBOL_GPL(ata_sas_port_start);
4040
4041/**
4042 * ata_port_stop - Undo ata_sas_port_start()
4043 * @ap: Port to shut down
4044 *
80289167
BK		 4045 * May be used as the port_stop() entry in ata_port_operations.
4046 *
4047 * LOCKING:
4048 * Inherited from caller.
4049 */
4050
4051void ata_sas_port_stop(struct ata_port *ap)
4052{
80289167
BK		 4053}
4054EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4055
b2024459
DW		 4056/**
4057 * ata_sas_async_probe - simply schedule probing and return
4058 * @ap: Port to probe
4059 *
4060 * For batch scheduling of probe for sas attached ata devices, assumes
4061 * the port has already been through ata_sas_port_init()
4062 */
4063void ata_sas_async_probe(struct ata_port *ap)
9508a66f 4064{
b2024459
DW		 4065 __ata_port_probe(ap);
4066}
4067EXPORT_SYMBOL_GPL(ata_sas_async_probe);
9508a66f 4068
b2024459
DW		 4069int ata_sas_sync_probe(struct ata_port *ap)
4070{
4071 return ata_port_probe(ap);
9508a66f 4072}
b2024459
DW		 4073EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4074
9508a66f 4075
80289167
BK		 4076/**
4077 * ata_sas_port_init - Initialize a SATA device
4078 * @ap: SATA port to initialize
4079 *
4080 * LOCKING:
4081 * PCI/etc. bus probe sem.
4082 *
4083 * RETURNS:
4084 * Zero on success, non-zero on error.
4085 */
4086
4087int ata_sas_port_init(struct ata_port *ap)
4088{
4089 int rc = ap->ops->port_start(ap);
4090
b2024459
DW		 4091 if (rc)
4092 return rc;
4093 ap->print_id = atomic_inc_return(&ata_print_id);
4094 return 0;
80289167
BK		 4095}
4096EXPORT_SYMBOL_GPL(ata_sas_port_init);
4097
4098/**
4099 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4100 * @ap: SATA port to destroy
4101 *
4102 */
4103
4104void ata_sas_port_destroy(struct ata_port *ap)
4105{
f0d36efd
TH		 4106 if (ap->ops->port_stop)
4107 ap->ops->port_stop(ap);
80289167
BK		 4108 kfree(ap);
4109}
4110EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4111
4112/**
4113 * ata_sas_slave_configure - Default slave_config routine for libata devices
4114 * @sdev: SCSI device to configure
4115 * @ap: ATA port to which SCSI device is attached
4116 *
4117 * RETURNS:
4118 * Zero.
4119 */
4120
4121int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4122{
4123 ata_scsi_sdev_config(sdev);
9af5c9c9 4124 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 4125 return 0;
4126}
4127EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4128
4129/**
4130 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4131 * @cmd: SCSI command to be sent
80289167
BK		 4132 * @ap: ATA port to which the command is being sent
4133 *
4134 * RETURNS:
08475a19
BK		 4135 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4136 * 0 otherwise.
80289167
BK		 4137 */
4138
b27dcfb0 4139int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 4140{
08475a19
BK		 4141 int rc = 0;
4142
80289167
BK		 4143 ata_scsi_dump_cdb(ap, cmd);
4144
2486fa56 4145 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 4146 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 4147 else {
4148 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 4149 cmd->scsi_done(cmd);
80289167 4150 }
08475a19 4151 return rc;
80289167
BK		 4152}
4153EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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