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[SCSI] libsas: fix ata_eh clobbering ex_phys via smp_ata_check_ready
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
5a0e3ad6 36#include <linux/slab.h>
1da177e4
LT		 37#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
38789fda 40#include <linux/export.h>
1da177e4 41#include <scsi/scsi.h>
1da177e4 42#include <scsi/scsi_host.h>
beb40487 43#include <scsi/scsi_cmnd.h>
85837ebd 44#include <scsi/scsi_eh.h>
005a5a06 45#include <scsi/scsi_device.h>
a6e6ce8e 46#include <scsi/scsi_tcq.h>
30afc84c 47#include <scsi/scsi_transport.h>
1da177e4 48#include <linux/libata.h>
b095518e 49#include <linux/hdreg.h>
2dcb407e 50#include <linux/uaccess.h>
2a6e58d2 51#include <linux/suspend.h>
18f0f978 52#include <asm/unaligned.h>
1da177e4
LT		 53
54#include "libata.h"
d9027470 55#include "libata-transport.h"
1da177e4 56
87340e98
TH		 57#define ATA_SCSI_RBUF_SIZE 4096
58
59static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 61
ad706991 62typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 63
2dcb407e 64static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 65 const struct scsi_device *scsidev);
2dcb407e 66static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 67 const struct scsi_device *scsidev);
1da177e4 68
00ac37f5
DG		 69#define RW_RECOVERY_MPAGE 0x1
70#define RW_RECOVERY_MPAGE_LEN 12
71#define CACHE_MPAGE 0x8
72#define CACHE_MPAGE_LEN 20
73#define CONTROL_MPAGE 0xa
74#define CONTROL_MPAGE_LEN 12
75#define ALL_MPAGES 0x3f
76#define ALL_SUB_MPAGES 0xff
77
78
24f75686 79static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 80 RW_RECOVERY_MPAGE,
81 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 82 (1 << 7), /* AWRE */
00ac37f5
DG		 83 0, /* read retry count */
84 0, 0, 0, 0,
85 0, /* write retry count */
86 0, 0, 0
87};
88
89static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
90 CACHE_MPAGE,
91 CACHE_MPAGE_LEN - 2,
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0
96};
97
98static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE,
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
105};
106
c93b263e
TH		 107static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
ca77329f
KCA		 112};
113
c93b263e
TH		 114static ssize_t ata_scsi_lpm_store(struct device *dev,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
ca77329f 117{
ee959b00 118 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 119 struct ata_port *ap = ata_shost_to_port(shost);
c93b263e 120 enum ata_lpm_policy policy;
6b7ae954 121 unsigned long flags;
c93b263e
TH		 122
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy = ATA_LPM_MAX_POWER;
125 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
126 const char *name = ata_lpm_policy_names[policy];
127
128 if (strncmp(name, buf, strlen(name)) == 0)
ca77329f 129 break;
ca77329f 130 }
c93b263e 131 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 132 return -EINVAL;
133
6b7ae954
TH		 134 spin_lock_irqsave(ap->lock, flags);
135 ap->target_lpm_policy = policy;
136 ata_port_schedule_eh(ap);
137 spin_unlock_irqrestore(ap->lock, flags);
138
ca77329f
KCA		 139 return count;
140}
141
c93b263e
TH		 142static ssize_t ata_scsi_lpm_show(struct device *dev,
143 struct device_attribute *attr, char *buf)
ca77329f 144{
ee959b00 145 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 146 struct ata_port *ap = ata_shost_to_port(shost);
ca77329f 147
6b7ae954 148 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 149 return -EINVAL;
150
c93b263e 151 return snprintf(buf, PAGE_SIZE, "%s\n",
6b7ae954 152 ata_lpm_policy_names[ap->target_lpm_policy]);
ca77329f 153}
ee959b00 154DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
c93b263e 155 ata_scsi_lpm_show, ata_scsi_lpm_store);
ee959b00 156EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 157
45fabbb7
EO		 158static ssize_t ata_scsi_park_show(struct device *device,
159 struct device_attribute *attr, char *buf)
160{
161 struct scsi_device *sdev = to_scsi_device(device);
162 struct ata_port *ap;
163 struct ata_link *link;
164 struct ata_device *dev;
a464189d 165 unsigned long flags, now;
45fabbb7
EO		 166 unsigned int uninitialized_var(msecs);
167 int rc = 0;
168
169 ap = ata_shost_to_port(sdev->host);
170
171 spin_lock_irqsave(ap->lock, flags);
172 dev = ata_scsi_find_dev(ap, sdev);
173 if (!dev) {
174 rc = -ENODEV;
175 goto unlock;
176 }
177 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
178 rc = -EOPNOTSUPP;
179 goto unlock;
180 }
181
182 link = dev->link;
a464189d 183 now = jiffies;
45fabbb7
EO		 184 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
185 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 186 time_after(dev->unpark_deadline, now))
187 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 188 else
189 msecs = 0;
190
191unlock:
192 spin_unlock_irq(ap->lock);
193
194 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
195}
196
197static ssize_t ata_scsi_park_store(struct device *device,
198 struct device_attribute *attr,
199 const char *buf, size_t len)
200{
201 struct scsi_device *sdev = to_scsi_device(device);
202 struct ata_port *ap;
203 struct ata_device *dev;
204 long int input;
205 unsigned long flags;
206 int rc;
207
208 rc = strict_strtol(buf, 10, &input);
209 if (rc || input < -2)
210 return -EINVAL;
211 if (input > ATA_TMOUT_MAX_PARK) {
212 rc = -EOVERFLOW;
213 input = ATA_TMOUT_MAX_PARK;
214 }
215
216 ap = ata_shost_to_port(sdev->host);
217
218 spin_lock_irqsave(ap->lock, flags);
219 dev = ata_scsi_find_dev(ap, sdev);
220 if (unlikely(!dev)) {
221 rc = -ENODEV;
222 goto unlock;
223 }
224 if (dev->class != ATA_DEV_ATA) {
225 rc = -EOPNOTSUPP;
226 goto unlock;
227 }
228
229 if (input >= 0) {
230 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
231 rc = -EOPNOTSUPP;
232 goto unlock;
233 }
234
235 dev->unpark_deadline = ata_deadline(jiffies, input);
236 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
237 ata_port_schedule_eh(ap);
238 complete(&ap->park_req_pending);
239 } else {
240 switch (input) {
241 case -1:
242 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
243 break;
244 case -2:
245 dev->flags |= ATA_DFLAG_NO_UNLOAD;
246 break;
247 }
248 }
249unlock:
250 spin_unlock_irqrestore(ap->lock, flags);
251
252 return rc ? rc : len;
253}
254DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
255 ata_scsi_park_show, ata_scsi_park_store);
256EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
257
f0761be3
TH		 258static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
259{
260 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
261
262 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
263}
264
18f7ba4c
KCA		 265static ssize_t
266ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
267 const char *buf, size_t count)
268{
269 struct Scsi_Host *shost = class_to_shost(dev);
270 struct ata_port *ap = ata_shost_to_port(shost);
271 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
272 return ap->ops->em_store(ap, buf, count);
273 return -EINVAL;
274}
275
276static ssize_t
277ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
278 char *buf)
279{
280 struct Scsi_Host *shost = class_to_shost(dev);
281 struct ata_port *ap = ata_shost_to_port(shost);
282
283 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
284 return ap->ops->em_show(ap, buf);
285 return -EINVAL;
286}
ea7a5ed5 287DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
18f7ba4c
KCA		 288 ata_scsi_em_message_show, ata_scsi_em_message_store);
289EXPORT_SYMBOL_GPL(dev_attr_em_message);
290
291static ssize_t
292ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
293 char *buf)
294{
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct ata_port *ap = ata_shost_to_port(shost);
297
298 return snprintf(buf, 23, "%d\n", ap->em_message_type);
299}
300DEVICE_ATTR(em_message_type, S_IRUGO,
301 ata_scsi_em_message_type_show, NULL);
302EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
303
304static ssize_t
305ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
306 char *buf)
307{
308 struct scsi_device *sdev = to_scsi_device(dev);
309 struct ata_port *ap = ata_shost_to_port(sdev->host);
310 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
311
312 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
313 return ap->ops->sw_activity_show(atadev, buf);
314 return -EINVAL;
315}
316
317static ssize_t
318ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
319 const char *buf, size_t count)
320{
321 struct scsi_device *sdev = to_scsi_device(dev);
322 struct ata_port *ap = ata_shost_to_port(sdev->host);
323 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
324 enum sw_activity val;
325 int rc;
326
327 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
328 val = simple_strtoul(buf, NULL, 0);
329 switch (val) {
330 case OFF: case BLINK_ON: case BLINK_OFF:
331 rc = ap->ops->sw_activity_store(atadev, val);
332 if (!rc)
333 return count;
334 else
335 return rc;
336 }
337 }
338 return -EINVAL;
339}
ea7a5ed5 340DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
18f7ba4c
KCA		 341 ata_scsi_activity_store);
342EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
343
45fabbb7
EO		 344struct device_attribute *ata_common_sdev_attrs[] = {
345 &dev_attr_unload_heads,
346 NULL
347};
348EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
349
b27dcfb0 350static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
ae006510
DG		 351{
352 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
353 /* "Invalid field in cbd" */
b27dcfb0 354 cmd->scsi_done(cmd);
ae006510
DG		 355}
356
1da177e4
LT		 357/**
358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
359 * @sdev: SCSI device for which BIOS geometry is to be determined
360 * @bdev: block device associated with @sdev
361 * @capacity: capacity of SCSI device
362 * @geom: location to which geometry will be output
363 *
364 * Generic bios head/sector/cylinder calculator
365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
366 * mapping. Some situations may arise where the disk is not
367 * bootable if this is not used.
368 *
369 * LOCKING:
370 * Defined by the SCSI layer. We don't really care.
371 *
372 * RETURNS:
373 * Zero.
374 */
375int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
376 sector_t capacity, int geom[])
377{
378 geom[0] = 255;
379 geom[1] = 63;
380 sector_div(capacity, 255*63);
381 geom[2] = capacity;
382
383 return 0;
384}
385
d8d9129e
TH		 386/**
387 * ata_scsi_unlock_native_capacity - unlock native capacity
388 * @sdev: SCSI device to adjust device capacity for
389 *
390 * This function is called if a partition on @sdev extends beyond
391 * the end of the device. It requests EH to unlock HPA.
392 *
393 * LOCKING:
394 * Defined by the SCSI layer. Might sleep.
395 */
396void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
397{
398 struct ata_port *ap = ata_shost_to_port(sdev->host);
399 struct ata_device *dev;
400 unsigned long flags;
401
402 spin_lock_irqsave(ap->lock, flags);
403
404 dev = ata_scsi_find_dev(ap, sdev);
405 if (dev && dev->n_sectors < dev->n_native_sectors) {
406 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
407 dev->link->eh_info.action |= ATA_EH_RESET;
408 ata_port_schedule_eh(ap);
409 }
410
411 spin_unlock_irqrestore(ap->lock, flags);
412 ata_port_wait_eh(ap);
413}
414
5924b74c
TH		 415/**
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 417 * @ap: target port
5924b74c
TH		 418 * @sdev: SCSI device to get identify data for
419 * @arg: User buffer area for identify data
420 *
421 * LOCKING:
422 * Defined by the SCSI layer. We don't really care.
423 *
424 * RETURNS:
425 * Zero on success, negative errno on error.
426 */
94be9a58
JG		 427static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
428 void __user *arg)
5924b74c 429{
5924b74c
TH		 430 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
431 u16 __user *dst = arg;
432 char buf[40];
433
434 if (!dev)
435 return -ENOMSG;
436
437 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
438 return -EFAULT;
439
440 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
441 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
442 return -EFAULT;
443
444 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
445 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
446 return -EFAULT;
447
448 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
449 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
450 return -EFAULT;
451
452 return 0;
453}
454
b095518e
JG		 455/**
456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 457 * @scsidev: Device to which we are issuing command
b095518e
JG		 458 * @arg: User provided data for issuing command
459 *
460 * LOCKING:
461 * Defined by the SCSI layer. We don't really care.
462 *
463 * RETURNS:
464 * Zero on success, negative errno on error.
465 */
b095518e
JG		 466int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
467{
468 int rc = 0;
469 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 470 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 471 int argsize = 0;
85837ebd 472 enum dma_data_direction data_dir;
bbe1fe7e 473 int cmd_result;
b095518e 474
c893a3ae 475 if (arg == NULL)
b095518e
JG		 476 return -EINVAL;
477
478 if (copy_from_user(args, arg, sizeof(args)))
479 return -EFAULT;
480
bbe1fe7e
ET		 481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
482 if (!sensebuf)
483 return -ENOMEM;
484
b095518e
JG		 485 memset(scsi_cmd, 0, sizeof(scsi_cmd));
486
487 if (args[3]) {
295124dc 488 argsize = ATA_SECT_SIZE * args[3];
b095518e 489 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 490 if (argbuf == NULL) {
491 rc = -ENOMEM;
492 goto error;
493 }
b095518e
JG		 494
495 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
496 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 497 block count in sector count field */
85837ebd 498 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 499 } else {
500 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 501 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 502 data_dir = DMA_NONE;
b095518e
JG		 503 }
504
505 scsi_cmd[0] = ATA_16;
506
507 scsi_cmd[4] = args[2];
a4f19040 508 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 509 scsi_cmd[6] = args[3];
510 scsi_cmd[8] = args[1];
511 scsi_cmd[10] = 0x4f;
512 scsi_cmd[12] = 0xc2;
513 } else {
514 scsi_cmd[6] = args[1];
515 }
516 scsi_cmd[14] = args[0];
517
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 520 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 521 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 522
523 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
524 u8 *desc = sensebuf + 8;
525 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526
527 /* If we set cc then ATA pass-through will cause a
528 * check condition even if no error. Filter that. */
529 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
530 struct scsi_sense_hdr sshdr;
531 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e
JG		 532 &sshdr);
533 if (sshdr.sense_key == 0 &&
534 sshdr.asc == 0 && sshdr.ascq == 0)
bbe1fe7e
ET		 535 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
536 }
537
538 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 539 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
540 desc[0] == 0x09) { /* code is "ATA Descriptor" */
541 args[0] = desc[13]; /* status */
542 args[1] = desc[3]; /* error */
543 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 544 if (copy_to_user(arg, args, sizeof(args)))
545 rc = -EFAULT;
546 }
547 }
548
549
550 if (cmd_result) {
b095518e
JG		 551 rc = -EIO;
552 goto error;
553 }
554
b095518e 555 if ((argbuf)
c893a3ae 556 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 557 rc = -EFAULT;
558error:
bbe1fe7e 559 kfree(sensebuf);
8f760780 560 kfree(argbuf);
b095518e
JG		 561 return rc;
562}
563
564/**
565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 566 * @scsidev: Device to which we are issuing command
b095518e
JG		 567 * @arg: User provided data for issuing command
568 *
569 * LOCKING:
570 * Defined by the SCSI layer. We don't really care.
571 *
572 * RETURNS:
573 * Zero on success, negative errno on error.
574 */
575int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
576{
577 int rc = 0;
578 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 579 u8 args[7], *sensebuf = NULL;
580 int cmd_result;
b095518e 581
c893a3ae 582 if (arg == NULL)
b095518e
JG		 583 return -EINVAL;
584
585 if (copy_from_user(args, arg, sizeof(args)))
586 return -EFAULT;
587
af068bd1
DM		 588 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
589 if (!sensebuf)
590 return -ENOMEM;
591
b095518e
JG		 592 memset(scsi_cmd, 0, sizeof(scsi_cmd));
593 scsi_cmd[0] = ATA_16;
594 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 595 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 596 scsi_cmd[4] = args[1];
597 scsi_cmd[6] = args[2];
598 scsi_cmd[8] = args[3];
599 scsi_cmd[10] = args[4];
600 scsi_cmd[12] = args[5];
277239f2 601 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 602 scsi_cmd[14] = args[0];
603
b095518e 604 /* Good values for timeout and retries? Values below
2e9edbf8 605 from scsi_ioctl_send_command() for default case... */
af068bd1 606 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 607 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 608
609 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
610 u8 *desc = sensebuf + 8;
611 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612
613 /* If we set cc then ATA pass-through will cause a
614 * check condition even if no error. Filter that. */
615 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
616 struct scsi_sense_hdr sshdr;
617 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
618 &sshdr);
2dcb407e
JG		 619 if (sshdr.sense_key == 0 &&
620 sshdr.asc == 0 && sshdr.ascq == 0)
af068bd1
DM		 621 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
622 }
623
624 /* Send userspace ATA registers */
625 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
626 desc[0] == 0x09) {/* code is "ATA Descriptor" */
627 args[0] = desc[13]; /* status */
628 args[1] = desc[3]; /* error */
629 args[2] = desc[5]; /* sector count (0:7) */
630 args[3] = desc[7]; /* lbal */
631 args[4] = desc[9]; /* lbam */
632 args[5] = desc[11]; /* lbah */
633 args[6] = desc[12]; /* select */
634 if (copy_to_user(arg, args, sizeof(args)))
635 rc = -EFAULT;
636 }
637 }
638
639 if (cmd_result) {
b095518e 640 rc = -EIO;
af068bd1
DM		 641 goto error;
642 }
b095518e 643
af068bd1
DM		 644 error:
645 kfree(sensebuf);
b095518e
JG		 646 return rc;
647}
648
e3cf95dd
AC		 649static int ata_ioc32(struct ata_port *ap)
650{
651 if (ap->flags & ATA_FLAG_PIO_DMA)
652 return 1;
653 if (ap->pflags & ATA_PFLAG_PIO32)
654 return 1;
655 return 0;
656}
657
94be9a58
JG		 658int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
659 int cmd, void __user *arg)
1da177e4 660{
1da177e4 661 int val = -EINVAL, rc = -EINVAL;
e3cf95dd 662 unsigned long flags;
1da177e4 663
1da177e4
LT		 664 switch (cmd) {
665 case ATA_IOC_GET_IO32:
e3cf95dd
AC		 666 spin_lock_irqsave(ap->lock, flags);
667 val = ata_ioc32(ap);
668 spin_unlock_irqrestore(ap->lock, flags);
1da177e4
LT		 669 if (copy_to_user(arg, &val, 1))
670 return -EFAULT;
671 return 0;
672
673 case ATA_IOC_SET_IO32:
674 val = (unsigned long) arg;
e3cf95dd
AC		 675 rc = 0;
676 spin_lock_irqsave(ap->lock, flags);
677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
678 if (val)
679 ap->pflags |= ATA_PFLAG_PIO32;
680 else
681 ap->pflags &= ~ATA_PFLAG_PIO32;
682 } else {
683 if (val != ata_ioc32(ap))
684 rc = -EINVAL;
685 }
686 spin_unlock_irqrestore(ap->lock, flags);
687 return rc;
1da177e4 688
5924b74c 689 case HDIO_GET_IDENTITY:
94be9a58 690 return ata_get_identity(ap, scsidev, arg);
5924b74c 691
b095518e
JG		 692 case HDIO_DRIVE_CMD:
693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
694 return -EACCES;
695 return ata_cmd_ioctl(scsidev, arg);
696
697 case HDIO_DRIVE_TASK:
698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
699 return -EACCES;
700 return ata_task_ioctl(scsidev, arg);
701
1da177e4
LT		 702 default:
703 rc = -ENOTTY;
704 break;
705 }
706
1da177e4
LT		 707 return rc;
708}
94be9a58
JG		 709EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
710
711int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
712{
713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
714 scsidev, cmd, arg);
715}
716EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 717
718/**
719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 720 * @dev: ATA device to which the new command is attached
721 * @cmd: SCSI command that originated this ATA command
1da177e4
LT		 722 *
723 * Obtain a reference to an unused ata_queued_cmd structure,
724 * which is the basic libata structure representing a single
725 * ATA command sent to the hardware.
726 *
727 * If a command was available, fill in the SCSI-specific
728 * portions of the structure with information on the
729 * current command.
730 *
731 * LOCKING:
cca3974e 732 * spin_lock_irqsave(host lock)
1da177e4
LT		 733 *
734 * RETURNS:
735 * Command allocated, or %NULL if none available.
736 */
7102d230 737static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
b27dcfb0 738 struct scsi_cmnd *cmd)
1da177e4
LT		 739{
740 struct ata_queued_cmd *qc;
741
8a8bc223 742 qc = ata_qc_new_init(dev);
1da177e4
LT		 743 if (qc) {
744 qc->scsicmd = cmd;
b27dcfb0 745 qc->scsidone = cmd->scsi_done;
1da177e4 746
ff2aeb1e 747 qc->sg = scsi_sglist(cmd);
7120165c 748 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 749 } else {
750 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
b27dcfb0 751 cmd->scsi_done(cmd);
1da177e4
LT		 752 }
753
754 return qc;
755}
756
aacda375
TH		 757static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
758{
759 struct scsi_cmnd *scmd = qc->scsicmd;
760
761 qc->extrabytes = scmd->request->extra_len;
762 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
763}
764
b095518e
JG		 765/**
766 * ata_dump_status - user friendly display of error info
767 * @id: id of the port in question
768 * @tf: ptr to filled out taskfile
769 *
770 * Decode and dump the ATA error/status registers for the user so
771 * that they have some idea what really happened at the non
772 * make-believe layer.
773 *
774 * LOCKING:
775 * inherited from caller
776 */
7102d230 777static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 778{
779 u8 stat = tf->command, err = tf->feature;
780
781 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
782 if (stat & ATA_BUSY) {
783 printk("Busy }\n"); /* Data is not valid in this case */
784 } else {
785 if (stat & 0x40) printk("DriveReady ");
786 if (stat & 0x20) printk("DeviceFault ");
787 if (stat & 0x10) printk("SeekComplete ");
788 if (stat & 0x08) printk("DataRequest ");
789 if (stat & 0x04) printk("CorrectedError ");
790 if (stat & 0x02) printk("Index ");
791 if (stat & 0x01) printk("Error ");
792 printk("}\n");
793
794 if (err) {
795 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
796 if (err & 0x04) printk("DriveStatusError ");
797 if (err & 0x80) {
798 if (err & 0x04) printk("BadCRC ");
799 else printk("Sector ");
800 }
801 if (err & 0x40) printk("UncorrectableError ");
802 if (err & 0x10) printk("SectorIdNotFound ");
803 if (err & 0x02) printk("TrackZeroNotFound ");
804 if (err & 0x01) printk("AddrMarkNotFound ");
805 printk("}\n");
806 }
807 }
808}
809
1da177e4
LT		 810/**
811 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 812 * @id: ATA device number
1da177e4 813 * @drv_stat: value contained in ATA status register
b095518e
JG		 814 * @drv_err: value contained in ATA error register
815 * @sk: the sense key we'll fill out
816 * @asc: the additional sense code we'll fill out
817 * @ascq: the additional sense code qualifier we'll fill out
246619da 818 * @verbose: be verbose
1da177e4 819 *
b095518e
JG		 820 * Converts an ATA error into a SCSI error. Fill out pointers to
821 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
822 * format sense blocks.
1da177e4
LT		 823 *
824 * LOCKING:
cca3974e 825 * spin_lock_irqsave(host lock)
1da177e4 826 */
7102d230
AB		 827static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
828 u8 *asc, u8 *ascq, int verbose)
1da177e4 829{
b095518e 830 int i;
ffe75ef6 831
1da177e4 832 /* Based on the 3ware driver translation table */
98ac62de 833 static const unsigned char sense_table[][4] = {
1da177e4
LT		 834 /* BBD|ECC|ID|MAR */
835 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
836 /* BBD|ECC|ID */
837 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
838 /* ECC|MC|MARK */
839 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
840 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
841 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
842 /* MC|ID|ABRT|TRK0|MARK */
843 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
844 /* MCR|MARK */
845 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
846 /* Bad address mark */
847 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
848 /* TRK0 */
849 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
850 /* Abort & !ICRC */
851 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
852 /* Media change request */
853 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
854 /* SRV */
855 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
856 /* Media change */
857 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
858 /* ECC */
859 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
860 /* BBD - block marked bad */
861 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
862 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
863 };
98ac62de 864 static const unsigned char stat_table[][4] = {
1da177e4
LT		 865 /* Must be first because BUSY means no other bits valid */
866 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
867 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
868 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
869 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
870 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
871 };
1da177e4 872
1da177e4
LT		 873 /*
874 * Is this an error we can process/parse
875 */
b095518e
JG		 876 if (drv_stat & ATA_BUSY) {
877 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 878 }
b095518e
JG		 879
880 if (drv_err) {
881 /* Look for drv_err */
882 for (i = 0; sense_table[i][0] != 0xFF; i++) {
883 /* Look for best matches first */
2e9edbf8 884 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 885 sense_table[i][0]) {
886 *sk = sense_table[i][1];
887 *asc = sense_table[i][2];
888 *ascq = sense_table[i][3];
889 goto translate_done;
890 }
891 }
892 /* No immediate match */
246619da
TH		 893 if (verbose)
894 printk(KERN_WARNING "ata%u: no sense translation for "
895 "error 0x%02x\n", id, drv_err);
1da177e4 896 }
b095518e
JG		 897
898 /* Fall back to interpreting status bits */
899 for (i = 0; stat_table[i][0] != 0xFF; i++) {
900 if (stat_table[i][0] & drv_stat) {
901 *sk = stat_table[i][1];
902 *asc = stat_table[i][2];
903 *ascq = stat_table[i][3];
904 goto translate_done;
1da177e4 905 }
b095518e
JG		 906 }
907 /* No error? Undecoded? */
246619da
TH		 908 if (verbose)
909 printk(KERN_WARNING "ata%u: no sense translation for "
910 "status: 0x%02x\n", id, drv_stat);
b095518e 911
2d202024
AC		 912 /* We need a sensible error return here, which is tricky, and one
913 that won't cause people to do things like return a disk wrongly */
914 *sk = ABORTED_COMMAND;
915 *asc = 0x00;
916 *ascq = 0x00;
b095518e
JG		 917
918 translate_done:
246619da
TH		 919 if (verbose)
920 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
921 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
922 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 923 return;
924}
925
926/*
750426aa 927 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 928 * @qc: Command that completed.
929 *
930 * This function is specific to the ATA descriptor format sense
931 * block specified for the ATA pass through commands. Regardless
932 * of whether the command errored or not, return a sense
933 * block. Copy all controller registers into the sense
934 * block. Clear sense key, ASC & ASCQ if there is no error.
935 *
936 * LOCKING:
750426aa 937 * None.
b095518e 938 */
750426aa 939static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 940{
941 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 942 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 943 unsigned char *sb = cmd->sense_buffer;
944 unsigned char *desc = sb + 8;
246619da 945 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 946
947 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
948
0e5dec47 949 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 950
b095518e
JG		 951 /*
952 * Use ata_to_sense_error() to map status register bits
953 * onto sense key, asc & ascq.
954 */
058e55e1
TH		 955 if (qc->err_mask ||
956 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 957 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 958 &sb[1], &sb[2], &sb[3], verbose);
b095518e 959 sb[1] &= 0x0f;
1da177e4
LT		 960 }
961
b095518e
JG		 962 /*
963 * Sense data is current and format is descriptor.
964 */
965 sb[0] = 0x72;
1da177e4 966
b095518e
JG		 967 desc[0] = 0x09;
968
f38621b3
TH		 969 /* set length of additional sense data */
970 sb[7] = 14;
971 desc[1] = 12;
b095518e
JG		 972
973 /*
974 * Copy registers into sense buffer.
975 */
976 desc[2] = 0x00;
977 desc[3] = tf->feature; /* == error reg */
978 desc[5] = tf->nsect;
979 desc[7] = tf->lbal;
980 desc[9] = tf->lbam;
981 desc[11] = tf->lbah;
982 desc[12] = tf->device;
983 desc[13] = tf->command; /* == status reg */
984
985 /*
986 * Fill in Extend bit, and the high order bytes
987 * if applicable.
988 */
989 if (tf->flags & ATA_TFLAG_LBA48) {
990 desc[2] |= 0x01;
991 desc[4] = tf->hob_nsect;
992 desc[6] = tf->hob_lbal;
993 desc[8] = tf->hob_lbam;
994 desc[10] = tf->hob_lbah;
1da177e4 995 }
b095518e 996}
1da177e4 997
b095518e 998/**
750426aa 999 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1000 * @qc: Command that we are erroring out
1001 *
d25614ba 1002 * Generate sense block for a failed ATA command @qc. Descriptor
25985edc 1003 * format is used to accommodate LBA48 block address.
b095518e
JG		 1004 *
1005 * LOCKING:
750426aa 1006 * None.
b095518e 1007 */
750426aa 1008static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1009{
d25614ba 1010 struct ata_device *dev = qc->dev;
b095518e 1011 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1012 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1013 unsigned char *sb = cmd->sense_buffer;
d25614ba 1014 unsigned char *desc = sb + 8;
246619da 1015 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1016 u64 block;
b095518e
JG		 1017
1018 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1019
0e5dec47 1020 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1021
d25614ba
TH		 1022 /* sense data is current and format is descriptor */
1023 sb[0] = 0x72;
1024
1025 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1026 * onto sense key, asc & ascq.
1027 */
058e55e1
TH		 1028 if (qc->err_mask ||
1029 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1030 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1031 &sb[1], &sb[2], &sb[3], verbose);
1032 sb[1] &= 0x0f;
1da177e4 1033 }
1da177e4 1034
d25614ba 1035 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1036
d25614ba
TH		 1037 /* information sense data descriptor */
1038 sb[7] = 12;
1039 desc[0] = 0x00;
1040 desc[1] = 10;
a7dac447 1041
d25614ba
TH		 1042 desc[2] |= 0x80; /* valid */
1043 desc[6] = block >> 40;
1044 desc[7] = block >> 32;
1045 desc[8] = block >> 24;
1046 desc[9] = block >> 16;
1047 desc[10] = block >> 8;
1048 desc[11] = block;
1da177e4
LT		 1049}
1050
a6cce2a7
BK		 1051static void ata_scsi_sdev_config(struct scsi_device *sdev)
1052{
1053 sdev->use_10_for_rw = 1;
1054 sdev->use_10_for_ms = 1;
31cc23b3
TH		 1055
1056 /* Schedule policy is determined by ->qc_defer() callback and
1057 * it needs to see every deferred qc. Set dev_blocked to 1 to
1058 * prevent SCSI midlayer from automatically deferring
1059 * requests.
1060 */
1061 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1062}
1063
fa2fc7f4
JB		 1064/**
1065 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1066 * @rq: request to be checked
fa2fc7f4
JB		 1067 *
1068 * ATAPI commands which transfer variable length data to host
1069 * might overflow due to application error or hardare bug. This
1070 * function checks whether overflow should be drained and ignored
1071 * for @request.
1072 *
1073 * LOCKING:
1074 * None.
1075 *
1076 * RETURNS:
1077 * 1 if ; otherwise, 0.
1078 */
1079static int atapi_drain_needed(struct request *rq)
1080{
33659ebb 1081 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1082 return 0;
1083
7b6d91da 1084 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
fa2fc7f4
JB		 1085 return 0;
1086
1087 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1088}
1089
1090static int ata_scsi_dev_config(struct scsi_device *sdev,
1091 struct ata_device *dev)
a6cce2a7 1092{
900e599e 1093 struct request_queue *q = sdev->request_queue;
1094
45fabbb7
EO		 1095 if (!ata_id_has_unload(dev->id))
1096 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1097
914ed354 1098 /* configure max sectors */
900e599e 1099 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1100
fa2fc7f4 1101 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1102 void *buf;
1103
729a6a30
TH		 1104 sdev->sector_size = ATA_SECT_SIZE;
1105
1106 /* set DMA padding */
900e599e 1107 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1108
1109 /* configure draining */
1110 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1111 if (!buf) {
a9a79dfe 1112 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1113 return -ENOMEM;
1114 }
1115
1116 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1117 } else {
295124dc 1118 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1119 sdev->manage_start_stop = 1;
dde20207 1120 }
d8cf5389 1121
729a6a30
TH		 1122 /*
1123 * ata_pio_sectors() expects buffer for each sector to not cross
1124 * page boundary. Enforce it by requiring buffers to be sector
1125 * aligned, which works iff sector_size is not larger than
1126 * PAGE_SIZE. ATAPI devices also need the alignment as
1127 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1128 */
1129 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1130 ata_dev_warn(dev,
729a6a30
TH		 1131 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1132 sdev->sector_size);
1133
900e599e 1134 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1135
f26792d5
JG		 1136 if (dev->flags & ATA_DFLAG_AN)
1137 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1138
a6e6ce8e
TH		 1139 if (dev->flags & ATA_DFLAG_NCQ) {
1140 int depth;
1141
1142 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1143 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1144 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1145 }
fa2fc7f4 1146
900e599e 1147 blk_queue_flush_queueable(q, false);
1148
295124dc 1149 dev->sdev = sdev;
fa2fc7f4 1150 return 0;
a6cce2a7
BK		 1151}
1152
1da177e4
LT		 1153/**
1154 * ata_scsi_slave_config - Set SCSI device attributes
1155 * @sdev: SCSI device to examine
1156 *
1157 * This is called before we actually start reading
1158 * and writing to the device, to configure certain
1159 * SCSI mid-layer behaviors.
1160 *
1161 * LOCKING:
1162 * Defined by SCSI layer. We don't really care.
1163 */
1164
1165int ata_scsi_slave_config(struct scsi_device *sdev)
1166{
31534363
TH		 1167 struct ata_port *ap = ata_shost_to_port(sdev->host);
1168 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1169 int rc = 0;
31534363 1170
a6cce2a7 1171 ata_scsi_sdev_config(sdev);
1da177e4 1172
31534363 1173 if (dev)
fa2fc7f4 1174 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1175
fa2fc7f4 1176 return rc;
1da177e4
LT		 1177}
1178
83c47bcb
TH		 1179/**
1180 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1181 * @sdev: SCSI device to be destroyed
1182 *
1183 * @sdev is about to be destroyed for hot/warm unplugging. If
1184 * this unplugging was initiated by libata as indicated by NULL
1185 * dev->sdev, this function doesn't have to do anything.
1186 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1187 * Clear dev->sdev, schedule the device for ATA detach and invoke
1188 * EH.
1189 *
1190 * LOCKING:
1191 * Defined by SCSI layer. We don't really care.
1192 */
1193void ata_scsi_slave_destroy(struct scsi_device *sdev)
1194{
1195 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1196 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1197 unsigned long flags;
1198 struct ata_device *dev;
1199
1200 if (!ap->ops->error_handler)
1201 return;
1202
ba6a1308 1203 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1204 dev = __ata_scsi_find_dev(ap, sdev);
1205 if (dev && dev->sdev) {
1206 /* SCSI device already in CANCEL state, no need to offline it */
1207 dev->sdev = NULL;
1208 dev->flags |= ATA_DFLAG_DETACH;
1209 ata_port_schedule_eh(ap);
1210 }
ba6a1308 1211 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1212
1213 kfree(q->dma_drain_buffer);
1214 q->dma_drain_buffer = NULL;
1215 q->dma_drain_size = 0;
83c47bcb
TH		 1216}
1217
a6e6ce8e 1218/**
f6e67035 1219 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
6d2dd054
MPS		 1220 * @ap: ATA port to which the device change the queue depth
1221 * @sdev: SCSI device to configure queue depth for
1222 * @queue_depth: new queue depth
1223 * @reason: calling context
a6e6ce8e 1224 *
f6e67035
DW		 1225 * libsas and libata have different approaches for associating a sdev to
1226 * its ata_port.
a6e6ce8e 1227 *
a6e6ce8e 1228 */
f6e67035
DW		 1229int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1230 int queue_depth, int reason)
a6e6ce8e 1231{
a6e6ce8e 1232 struct ata_device *dev;
360f654e 1233 unsigned long flags;
a6e6ce8e 1234
e881a172
MC		 1235 if (reason != SCSI_QDEPTH_DEFAULT)
1236 return -EOPNOTSUPP;
1237
c3c70c44 1238 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1239 return sdev->queue_depth;
1240
1241 dev = ata_scsi_find_dev(ap, sdev);
1242 if (!dev || !ata_dev_enabled(dev))
1243 return sdev->queue_depth;
1244
c3c70c44 1245 /* NCQ enabled? */
360f654e 1246 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1247 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1248 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1249 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1250 queue_depth = 1;
1251 }
360f654e
TH		 1252 spin_unlock_irqrestore(ap->lock, flags);
1253
c3c70c44
TH		 1254 /* limit and apply queue depth */
1255 queue_depth = min(queue_depth, sdev->host->can_queue);
1256 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1257 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1258
1259 if (sdev->queue_depth == queue_depth)
1260 return -EINVAL;
1261
1262 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1263 return queue_depth;
1264}
1265
f6e67035
DW		 1266/**
1267 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1268 * @sdev: SCSI device to configure queue depth for
1269 * @queue_depth: new queue depth
1270 * @reason: calling context
1271 *
1272 * This is libata standard hostt->change_queue_depth callback.
1273 * SCSI will call into this callback when user tries to set queue
1274 * depth via sysfs.
1275 *
1276 * LOCKING:
1277 * SCSI layer (we don't care)
1278 *
1279 * RETURNS:
1280 * Newly configured queue depth.
1281 */
1282int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1283 int reason)
1284{
1285 struct ata_port *ap = ata_shost_to_port(sdev->host);
1286
1287 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1288}
1289
972dcafb
DG		 1290/**
1291 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1292 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1293 *
1294 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1295 * (to start). Perhaps these commands should be preceded by
1296 * CHECK POWER MODE to see what power mode the device is already in.
1297 * [See SAT revision 5 at www.t10.org]
1298 *
1299 * LOCKING:
cca3974e 1300 * spin_lock_irqsave(host lock)
972dcafb
DG		 1301 *
1302 * RETURNS:
1303 * Zero on success, non-zero on error.
1304 */
ad706991 1305static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1306{
542b1444 1307 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1308 struct ata_taskfile *tf = &qc->tf;
ad706991 1309 const u8 *cdb = scmd->cmnd;
972dcafb 1310
2e5704f6
TH		 1311 if (scmd->cmd_len < 5)
1312 goto invalid_fld;
1313
972dcafb
DG		 1314 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1315 tf->protocol = ATA_PROT_NODATA;
542b1444 1316 if (cdb[1] & 0x1) {
972dcafb
DG		 1317 ; /* ignore IMMED bit, violates sat-r05 */
1318 }
542b1444 1319 if (cdb[4] & 0x2)
ae006510 1320 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1321 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1322 goto invalid_fld; /* power conditions not supported */
e31e8531 1323
542b1444 1324 if (cdb[4] & 0x1) {
972dcafb 1325 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1326
1327 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1328 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1329
1330 tf->lbah = 0x0;
1331 tf->lbam = 0x0;
1332 tf->lbal = 0x0;
1333 tf->device |= ATA_LBA;
1334 } else {
1335 /* CHS */
1336 tf->lbal = 0x1; /* sect */
1337 tf->lbam = 0x0; /* cyl low */
1338 tf->lbah = 0x0; /* cyl high */
1339 }
1340
972dcafb 1341 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1342 } else {
2a6e58d2
RW		 1343 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1344 * or S5) causing some drives to spin up and down again.
1345 */
1346 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1347 system_state == SYSTEM_POWER_OFF)
1348 goto skip;
1349
1350 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1351 system_entering_hibernation())
1352 goto skip;
1353
78981a7c
RH		 1354 /* Issue ATA STANDBY IMMEDIATE command */
1355 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1356 }
78981a7c 1357
972dcafb
DG		 1358 /*
1359 * Standby and Idle condition timers could be implemented but that
1360 * would require libata to implement the Power condition mode page
1361 * and allow the user to change it. Changing mode pages requires
1362 * MODE SELECT to be implemented.
1363 */
1364
1365 return 0;
ae006510 1366
2a6e58d2 1367 invalid_fld:
542b1444 1368 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1369 /* "Invalid field in cbd" */
1370 return 1;
2a6e58d2
RW		 1371 skip:
1372 scmd->result = SAM_STAT_GOOD;
1373 return 1;
972dcafb
DG		 1374}
1375
1376
1da177e4
LT		 1377/**
1378 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1379 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1380 *
1381 * Sets up an ATA taskfile to issue FLUSH CACHE or
1382 * FLUSH CACHE EXT.
1383 *
1384 * LOCKING:
cca3974e 1385 * spin_lock_irqsave(host lock)
1da177e4
LT		 1386 *
1387 * RETURNS:
1388 * Zero on success, non-zero on error.
1389 */
ad706991 1390static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1391{
1392 struct ata_taskfile *tf = &qc->tf;
1393
1394 tf->flags |= ATA_TFLAG_DEVICE;
1395 tf->protocol = ATA_PROT_NODATA;
1396
6fc49adb 1397 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1398 tf->command = ATA_CMD_FLUSH_EXT;
1399 else
1400 tf->command = ATA_CMD_FLUSH;
1401
b666da35
TH		 1402 /* flush is critical for IO integrity, consider it an IO command */
1403 qc->flags |= ATA_QCFLAG_IO;
1404
1da177e4
LT		 1405 return 0;
1406}
1407
3aef5231
AL		 1408/**
1409 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1410 * @cdb: SCSI command to translate
3aef5231
AL		 1411 *
1412 * Calculate LBA and transfer length for 6-byte commands.
1413 *
1414 * RETURNS:
1415 * @plba: the LBA
1416 * @plen: the transfer length
1417 */
542b1444 1418static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1419{
1420 u64 lba = 0;
6c7b7d2b 1421 u32 len;
3aef5231
AL		 1422
1423 VPRINTK("six-byte command\n");
1424
6c7b7d2b 1425 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1426 lba |= ((u64)cdb[2]) << 8;
1427 lba |= ((u64)cdb[3]);
3aef5231 1428
6c7b7d2b 1429 len = cdb[4];
3aef5231
AL		 1430
1431 *plba = lba;
1432 *plen = len;
1433}
1434
1435/**
1436 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1437 * @cdb: SCSI command to translate
3aef5231
AL		 1438 *
1439 * Calculate LBA and transfer length for 10-byte commands.
1440 *
1441 * RETURNS:
1442 * @plba: the LBA
1443 * @plen: the transfer length
1444 */
542b1444 1445static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1446{
1447 u64 lba = 0;
1448 u32 len = 0;
1449
1450 VPRINTK("ten-byte command\n");
1451
542b1444
TH		 1452 lba |= ((u64)cdb[2]) << 24;
1453 lba |= ((u64)cdb[3]) << 16;
1454 lba |= ((u64)cdb[4]) << 8;
1455 lba |= ((u64)cdb[5]);
3aef5231 1456
542b1444
TH		 1457 len |= ((u32)cdb[7]) << 8;
1458 len |= ((u32)cdb[8]);
3aef5231
AL		 1459
1460 *plba = lba;
1461 *plen = len;
1462}
1463
1464/**
1465 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1466 * @cdb: SCSI command to translate
3aef5231
AL		 1467 *
1468 * Calculate LBA and transfer length for 16-byte commands.
1469 *
1470 * RETURNS:
1471 * @plba: the LBA
1472 * @plen: the transfer length
1473 */
542b1444 1474static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1475{
1476 u64 lba = 0;
1477 u32 len = 0;
1478
1479 VPRINTK("sixteen-byte command\n");
1480
542b1444
TH		 1481 lba |= ((u64)cdb[2]) << 56;
1482 lba |= ((u64)cdb[3]) << 48;
1483 lba |= ((u64)cdb[4]) << 40;
1484 lba |= ((u64)cdb[5]) << 32;
1485 lba |= ((u64)cdb[6]) << 24;
1486 lba |= ((u64)cdb[7]) << 16;
1487 lba |= ((u64)cdb[8]) << 8;
1488 lba |= ((u64)cdb[9]);
3aef5231 1489
542b1444
TH		 1490 len |= ((u32)cdb[10]) << 24;
1491 len |= ((u32)cdb[11]) << 16;
1492 len |= ((u32)cdb[12]) << 8;
1493 len |= ((u32)cdb[13]);
3aef5231
AL		 1494
1495 *plba = lba;
1496 *plen = len;
1497}
1498
1da177e4
LT		 1499/**
1500 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1501 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1502 *
1503 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1504 *
1505 * LOCKING:
cca3974e 1506 * spin_lock_irqsave(host lock)
1da177e4
LT		 1507 *
1508 * RETURNS:
1509 * Zero on success, non-zero on error.
1510 */
ad706991 1511static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1512{
542b1444 1513 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1514 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1515 struct ata_device *dev = qc->dev;
1da177e4 1516 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1517 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1518 u64 block;
1519 u32 n_block;
1da177e4
LT		 1520
1521 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1522 tf->protocol = ATA_PROT_NODATA;
1da177e4 1523
2e5704f6
TH		 1524 if (cdb[0] == VERIFY) {
1525 if (scmd->cmd_len < 10)
1526 goto invalid_fld;
542b1444 1527 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1528 } else if (cdb[0] == VERIFY_16) {
1529 if (scmd->cmd_len < 16)
1530 goto invalid_fld;
542b1444 1531 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1532 } else
ae006510 1533 goto invalid_fld;
1da177e4 1534
8bf62ece 1535 if (!n_block)
ae006510 1536 goto nothing_to_do;
8bf62ece 1537 if (block >= dev_sectors)
ae006510 1538 goto out_of_range;
8bf62ece 1539 if ((block + n_block) > dev_sectors)
ae006510 1540 goto out_of_range;
1da177e4 1541
07506697
AL		 1542 if (dev->flags & ATA_DFLAG_LBA) {
1543 tf->flags |= ATA_TFLAG_LBA;
1544
c6a33e24
AL		 1545 if (lba_28_ok(block, n_block)) {
1546 /* use LBA28 */
1547 tf->command = ATA_CMD_VERIFY;
1548 tf->device |= (block >> 24) & 0xf;
1549 } else if (lba_48_ok(block, n_block)) {
1550 if (!(dev->flags & ATA_DFLAG_LBA48))
1551 goto out_of_range;
07506697
AL		 1552
1553 /* use LBA48 */
1554 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1555 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1556
8bf62ece 1557 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1558
8bf62ece
AL		 1559 tf->hob_lbah = (block >> 40) & 0xff;
1560 tf->hob_lbam = (block >> 32) & 0xff;
1561 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1562 } else
1563 /* request too large even for LBA48 */
1564 goto out_of_range;
8bf62ece
AL		 1565
1566 tf->nsect = n_block & 0xff;
1da177e4 1567
8bf62ece
AL		 1568 tf->lbah = (block >> 16) & 0xff;
1569 tf->lbam = (block >> 8) & 0xff;
1570 tf->lbal = block & 0xff;
1da177e4 1571
8bf62ece
AL		 1572 tf->device |= ATA_LBA;
1573 } else {
1574 /* CHS */
1575 u32 sect, head, cyl, track;
1576
c6a33e24
AL		 1577 if (!lba_28_ok(block, n_block))
1578 goto out_of_range;
07506697 1579
8bf62ece
AL		 1580 /* Convert LBA to CHS */
1581 track = (u32)block / dev->sectors;
1582 cyl = track / dev->heads;
1583 head = track % dev->heads;
1584 sect = (u32)block % dev->sectors + 1;
1585
c187c4b5
AL		 1586 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1587 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1588
1589 /* Check whether the converted CHS can fit.
1590 Cylinder: 0-65535
8bf62ece
AL		 1591 Head: 0-15
1592 Sector: 1-255*/
2e9edbf8 1593 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1594 goto out_of_range;
2e9edbf8 1595
8bf62ece
AL		 1596 tf->command = ATA_CMD_VERIFY;
1597 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1598 tf->lbal = sect;
1599 tf->lbam = cyl;
1600 tf->lbah = cyl >> 8;
1601 tf->device |= head;
1602 }
1da177e4
LT		 1603
1604 return 0;
ae006510
DG		 1605
1606invalid_fld:
542b1444 1607 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1608 /* "Invalid field in cbd" */
1609 return 1;
1610
1611out_of_range:
542b1444 1612 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1613 /* "Logical Block Address out of range" */
1614 return 1;
1615
1616nothing_to_do:
542b1444 1617 scmd->result = SAM_STAT_GOOD;
ae006510 1618 return 1;
1da177e4
LT		 1619}
1620
1621/**
1622 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1623 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1624 *
1625 * Converts any of six SCSI read/write commands into the
1626 * ATA counterpart, including starting sector (LBA),
1627 * sector count, and taking into account the device's LBA48
1628 * support.
1629 *
1630 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1631 * %WRITE_16 are currently supported.
1632 *
1633 * LOCKING:
cca3974e 1634 * spin_lock_irqsave(host lock)
1da177e4
LT		 1635 *
1636 * RETURNS:
1637 * Zero on success, non-zero on error.
1638 */
ad706991 1639static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1640{
542b1444 1641 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1642 const u8 *cdb = scmd->cmnd;
bd056d7e 1643 unsigned int tf_flags = 0;
3aef5231
AL		 1644 u64 block;
1645 u32 n_block;
bd056d7e 1646 int rc;
1da177e4 1647
542b1444 1648 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1649 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1650
9a3dccc4 1651 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1652 switch (cdb[0]) {
3aef5231
AL		 1653 case READ_10:
1654 case WRITE_10:
2e5704f6
TH		 1655 if (unlikely(scmd->cmd_len < 10))
1656 goto invalid_fld;
542b1444
TH		 1657 scsi_10_lba_len(cdb, &block, &n_block);
1658 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1659 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1660 break;
1661 case READ_6:
1662 case WRITE_6:
2e5704f6
TH		 1663 if (unlikely(scmd->cmd_len < 6))
1664 goto invalid_fld;
542b1444 1665 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1666
1667 /* for 6-byte r/w commands, transfer length 0
1668 * means 256 blocks of data, not 0 block.
1669 */
76b2bf9b
JG		 1670 if (!n_block)
1671 n_block = 256;
3aef5231
AL		 1672 break;
1673 case READ_16:
1674 case WRITE_16:
2e5704f6
TH		 1675 if (unlikely(scmd->cmd_len < 16))
1676 goto invalid_fld;
542b1444
TH		 1677 scsi_16_lba_len(cdb, &block, &n_block);
1678 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1679 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1680 break;
1681 default:
8bf62ece 1682 DPRINTK("no-byte command\n");
ae006510 1683 goto invalid_fld;
1da177e4
LT		 1684 }
1685
8bf62ece
AL		 1686 /* Check and compose ATA command */
1687 if (!n_block)
c187c4b5
AL		 1688 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1689 * length 0 means transfer 0 block of data.
1690 * However, for ATA R/W commands, sector count 0 means
1691 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1692 *
1693 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1694 */
ae006510 1695 goto nothing_to_do;
1da177e4 1696
bd056d7e 1697 qc->flags |= ATA_QCFLAG_IO;
295124dc 1698 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1699
bd056d7e
TH		 1700 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1701 qc->tag);
1702 if (likely(rc == 0))
1703 return 0;
ae006510 1704
bd056d7e
TH		 1705 if (rc == -ERANGE)
1706 goto out_of_range;
1707 /* treat all other errors as -EINVAL, fall through */
ae006510 1708invalid_fld:
542b1444 1709 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1710 /* "Invalid field in cbd" */
1711 return 1;
1712
1713out_of_range:
542b1444 1714 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1715 /* "Logical Block Address out of range" */
1716 return 1;
1717
1718nothing_to_do:
542b1444 1719 scmd->result = SAM_STAT_GOOD;
ae006510 1720 return 1;
1da177e4
LT		 1721}
1722
77853bf2 1723static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1724{
c31f571d 1725 struct ata_port *ap = qc->ap;
1da177e4 1726 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1727 u8 *cdb = cmd->cmnd;
2dcb407e 1728 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1729
1730 /* For ATA pass thru (SAT) commands, generate a sense block if
1731 * user mandated it or if there's an error. Note that if we
1732 * generate because the user forced us to, a check condition
1733 * is generated and the ATA register values are returned
1734 * whether the command completed successfully or not. If there
1735 * was no error, SK, ASC and ASCQ will all be zero.
1736 */
a7dac447 1737 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1738 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1739 ata_gen_passthru_sense(qc);
b095518e
JG		 1740 } else {
1741 if (!need_sense) {
1742 cmd->result = SAM_STAT_GOOD;
1743 } else {
1744 /* TODO: decide which descriptor format to use
1745 * for 48b LBA devices and call that here
1746 * instead of the fixed desc, which is only
1747 * good for smaller LBA (and maybe CHS?)
1748 * devices.
1749 */
750426aa 1750 ata_gen_ata_sense(qc);
b095518e
JG		 1751 }
1752 }
1da177e4 1753
c31f571d 1754 if (need_sense && !ap->ops->error_handler)
44877b4e 1755 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1756
1757 qc->scsidone(cmd);
1758
77853bf2 1759 ata_qc_free(qc);
1da177e4
LT		 1760}
1761
1762/**
1763 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1764 * @dev: ATA device to which the command is addressed
1765 * @cmd: SCSI command to execute
1da177e4
LT		 1766 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1767 *
1768 * Our ->queuecommand() function has decided that the SCSI
1769 * command issued can be directly translated into an ATA
1770 * command, rather than handled internally.
1771 *
1772 * This function sets up an ata_queued_cmd structure for the
1773 * SCSI command, and sends that ata_queued_cmd to the hardware.
1774 *
ae006510
DG		 1775 * The xlat_func argument (actor) returns 0 if ready to execute
1776 * ATA command, else 1 to finish translation. If 1 is returned
1777 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1778 * to be set reflecting an error condition or clean (early)
1779 * termination.
1780 *
1da177e4 1781 * LOCKING:
cca3974e 1782 * spin_lock_irqsave(host lock)
2115ea94
TH		 1783 *
1784 * RETURNS:
1785 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1786 * needs to be deferred.
1da177e4 1787 */
2115ea94 1788static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1789 ata_xlat_func_t xlat_func)
1da177e4 1790{
31cc23b3 1791 struct ata_port *ap = dev->link->ap;
1da177e4 1792 struct ata_queued_cmd *qc;
31cc23b3 1793 int rc;
1da177e4
LT		 1794
1795 VPRINTK("ENTER\n");
1796
b27dcfb0 1797 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 1798 if (!qc)
ae006510 1799 goto err_mem;
1da177e4
LT		 1800
1801 /* data is present; dma-map it */
be7db055
CH		 1802 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1803 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1804 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 1805 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 1806 goto err_did;
1da177e4
LT		 1807 }
1808
7120165c 1809 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1810
1811 qc->dma_dir = cmd->sc_data_direction;
1812 }
1813
1814 qc->complete_fn = ata_scsi_qc_complete;
1815
ad706991 1816 if (xlat_func(qc))
ae006510 1817 goto early_finish;
1da177e4 1818
31cc23b3
TH		 1819 if (ap->ops->qc_defer) {
1820 if ((rc = ap->ops->qc_defer(qc)))
1821 goto defer;
1822 }
1823
1da177e4 1824 /* select device, send command to hardware */
8e0e694a 1825 ata_qc_issue(qc);
1da177e4
LT		 1826
1827 VPRINTK("EXIT\n");
2115ea94 1828 return 0;
1da177e4 1829
ae006510 1830early_finish:
2dcb407e 1831 ata_qc_free(qc);
b27dcfb0 1832 cmd->scsi_done(cmd);
ae006510 1833 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1834 return 0;
ae006510
DG		 1835
1836err_did:
1da177e4 1837 ata_qc_free(qc);
ae006510 1838 cmd->result = (DID_ERROR << 16);
b27dcfb0 1839 cmd->scsi_done(cmd);
253b92ec 1840err_mem:
ae006510 1841 DPRINTK("EXIT - internal\n");
2115ea94 1842 return 0;
3dc1d881
TH		 1843
1844defer:
31cc23b3 1845 ata_qc_free(qc);
3dc1d881 1846 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1847 if (rc == ATA_DEFER_LINK)
1848 return SCSI_MLQUEUE_DEVICE_BUSY;
1849 else
1850 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1851}
1852
1853/**
1854 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1855 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1856 * @flags: unsigned long variable to store irq enable status
1857 * @copy_in: copy in from user buffer
1da177e4 1858 *
87340e98 1859 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1860 *
1861 * LOCKING:
87340e98 1862 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1863 *
1864 * RETURNS:
87340e98 1865 * Pointer to response buffer.
1da177e4 1866 */
87340e98
TH		 1867static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1868 unsigned long *flags)
1da177e4 1869{
87340e98 1870 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1871
87340e98
TH		 1872 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1873 if (copy_in)
1874 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1875 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1876 return ata_scsi_rbuf;
1da177e4
LT		 1877}
1878
1879/**
1880 * ata_scsi_rbuf_put - Unmap response buffer.
1881 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1882 * @copy_out: copy out result
1883 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1884 *
87340e98
TH		 1885 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1886 * @copy_back is true.
1da177e4
LT		 1887 *
1888 * LOCKING:
87340e98 1889 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1890 */
87340e98
TH		 1891static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1892 unsigned long *flags)
1da177e4 1893{
87340e98
TH		 1894 if (copy_out)
1895 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1896 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1897 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1898}
1899
1900/**
1901 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1902 * @args: device IDENTIFY data / SCSI command of interest.
1903 * @actor: Callback hook for desired SCSI command simulator
1904 *
1905 * Takes care of the hard work of simulating a SCSI command...
1906 * Mapping the response buffer, calling the command's handler,
1907 * and handling the handler's return value. This return value
1908 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1909 * completed successfully (0), or not (in which case cmd->result
1910 * and sense buffer are assumed to be set).
1da177e4
LT		 1911 *
1912 * LOCKING:
cca3974e 1913 * spin_lock_irqsave(host lock)
1da177e4 1914 */
f0761be3 1915static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1916 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1917{
1918 u8 *rbuf;
87340e98 1919 unsigned int rc;
1da177e4 1920 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1921 unsigned long flags;
1922
87340e98
TH		 1923 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1924 rc = actor(args, rbuf);
1925 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1926
ae006510 1927 if (rc == 0)
1da177e4 1928 cmd->result = SAM_STAT_GOOD;
ae006510 1929 args->done(cmd);
1da177e4
LT		 1930}
1931
1932/**
1933 * ata_scsiop_inq_std - Simulate INQUIRY command
1934 * @args: device IDENTIFY data / SCSI command of interest.
1935 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1936 *
1937 * Returns standard device identification data associated
b142eb65 1938 * with non-VPD INQUIRY command output.
1da177e4
LT		 1939 *
1940 * LOCKING:
cca3974e 1941 * spin_lock_irqsave(host lock)
1da177e4 1942 */
87340e98 1943static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1944{
87340e98
TH		 1945 const u8 versions[] = {
1946 0x60, /* SAM-3 (no version claimed) */
1947
1948 0x03,
1949 0x20, /* SBC-2 (no version claimed) */
1950
1951 0x02,
1952 0x60 /* SPC-3 (no version claimed) */
1953 };
1da177e4
LT		 1954 u8 hdr[] = {
1955 TYPE_DISK,
1956 0,
1957 0x5, /* claim SPC-3 version compatibility */
1958 2,
1959 95 - 4
1960 };
1961
87340e98
TH		 1962 VPRINTK("ENTER\n");
1963
1da177e4
LT		 1964 /* set scsi removeable (RMB) bit per ata bit */
1965 if (ata_id_removeable(args->id))
1966 hdr[1] |= (1 << 7);
1967
1da177e4 1968 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1969 memcpy(&rbuf[8], "ATA ", 8);
1970 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1971 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1972
87340e98
TH		 1973 if (rbuf[32] == 0 || rbuf[32] == ' ')
1974 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1975
87340e98 1976 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1977
1978 return 0;
1979}
1980
1981/**
b142eb65 1982 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1983 * @args: device IDENTIFY data / SCSI command of interest.
1984 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1985 *
b142eb65 1986 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1987 *
1988 * LOCKING:
cca3974e 1989 * spin_lock_irqsave(host lock)
1da177e4 1990 */
87340e98 1991static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1992{
1993 const u8 pages[] = {
1994 0x00, /* page 0x00, this page */
1995 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 1996 0x83, /* page 0x83, device ident page */
1997 0x89, /* page 0x89, ata info page */
18f0f978 1998 0xb0, /* page 0xb0, block limits page */
1e9dbc92 1999 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 2000 0xb2, /* page 0xb2, thin provisioning page */
1da177e4 2001 };
1da177e4 2002
87340e98
TH		 2003 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2004 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2005 return 0;
2006}
2007
2008/**
b142eb65 2009 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2010 * @args: device IDENTIFY data / SCSI command of interest.
2011 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2012 *
2013 * Returns ATA device serial number.
2014 *
2015 * LOCKING:
cca3974e 2016 * spin_lock_irqsave(host lock)
1da177e4 2017 */
87340e98 2018static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2019{
2020 const u8 hdr[] = {
2021 0,
2022 0x80, /* this page code */
2023 0,
a0cf733b 2024 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2025 };
1da177e4 2026
87340e98
TH		 2027 memcpy(rbuf, hdr, sizeof(hdr));
2028 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2029 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2030 return 0;
2031}
2032
1da177e4 2033/**
b142eb65 2034 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2035 * @args: device IDENTIFY data / SCSI command of interest.
2036 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2037 *
b142eb65
JG		 2038 * Yields two logical unit device identification designators:
2039 * - vendor specific ASCII containing the ATA serial number
2040 * - SAT defined "t10 vendor id based" containing ASCII vendor
2041 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2042 *
2043 * LOCKING:
cca3974e 2044 * spin_lock_irqsave(host lock)
1da177e4 2045 */
87340e98 2046static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2047{
b142eb65 2048 const int sat_model_serial_desc_len = 68;
87340e98 2049 int num;
1da177e4 2050
b142eb65
JG		 2051 rbuf[1] = 0x83; /* this page code */
2052 num = 4;
2053
87340e98
TH		 2054 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2055 rbuf[num + 0] = 2;
2056 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2057 num += 4;
2058 ata_id_string(args->id, (unsigned char *) rbuf + num,
2059 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2060 num += ATA_ID_SERNO_LEN;
2061
2062 /* SAT defined lu model and serial numbers descriptor */
2063 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2064 rbuf[num + 0] = 2;
2065 rbuf[num + 1] = 1;
2066 rbuf[num + 3] = sat_model_serial_desc_len;
2067 num += 4;
2068 memcpy(rbuf + num, "ATA ", 8);
2069 num += 8;
2070 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2071 ATA_ID_PROD_LEN);
2072 num += ATA_ID_PROD_LEN;
2073 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2074 ATA_ID_SERNO_LEN);
2075 num += ATA_ID_SERNO_LEN;
2076
6b3b9d73
HR		 2077 if (ata_id_has_wwn(args->id)) {
2078 /* SAT defined lu world wide name */
2079 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2080 rbuf[num + 0] = 1;
2081 rbuf[num + 1] = 3;
2082 rbuf[num + 3] = ATA_ID_WWN_LEN;
2083 num += 4;
2084 ata_id_string(args->id, (unsigned char *) rbuf + num,
2085 ATA_ID_WWN, ATA_ID_WWN_LEN);
2086 num += ATA_ID_WWN_LEN;
2087 }
b142eb65 2088 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2089 return 0;
2090}
2091
ad355b46
JG		 2092/**
2093 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2094 * @args: device IDENTIFY data / SCSI command of interest.
2095 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2096 *
2097 * Yields SAT-specified ATA VPD page.
2098 *
2099 * LOCKING:
2100 * spin_lock_irqsave(host lock)
2101 */
87340e98 2102static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2103{
ad355b46 2104 struct ata_taskfile tf;
ad355b46 2105
ad355b46
JG		 2106 memset(&tf, 0, sizeof(tf));
2107
87340e98
TH		 2108 rbuf[1] = 0x89; /* our page code */
2109 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2110 rbuf[3] = (0x238 & 0xff);
ad355b46 2111
87340e98
TH		 2112 memcpy(&rbuf[8], "linux ", 8);
2113 memcpy(&rbuf[16], "libata ", 16);
2114 memcpy(&rbuf[32], DRV_VERSION, 4);
2115 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2116
2117 /* we don't store the ATA device signature, so we fake it */
2118
2119 tf.command = ATA_DRDY; /* really, this is Status reg */
2120 tf.lbal = 0x1;
2121 tf.nsect = 0x1;
2122
87340e98
TH		 2123 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2124 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2125
87340e98 2126 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2127
87340e98 2128 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2129 return 0;
2130}
2131
18f0f978
CH		 2132static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2133{
295124dc 2134 u16 min_io_sectors;
18f0f978
CH		 2135
2136 rbuf[1] = 0xb0;
2137 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2138
2139 /*
2140 * Optimal transfer length granularity.
2141 *
2142 * This is always one physical block, but for disks with a smaller
2143 * logical than physical sector size we need to figure out what the
2144 * latter is.
2145 */
295124dc 2146 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2147 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2148
2149 /*
2150 * Optimal unmap granularity.
2151 *
2152 * The ATA spec doesn't even know about a granularity or alignment
2153 * for the TRIM command. We can leave away most of the unmap related
2154 * VPD page entries, but we have specifify a granularity to signal
2155 * that we support some form of unmap - in thise case via WRITE SAME
2156 * with the unmap bit set.
2157 */
e78db4df 2158 if (ata_id_has_trim(args->id)) {
5f4e2066 2159 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
18f0f978 2160 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2161 }
18f0f978
CH		 2162
2163 return 0;
2164}
2165
1e9dbc92
MW		 2166static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2167{
4bca3286
MP		 2168 int form_factor = ata_id_form_factor(args->id);
2169 int media_rotation_rate = ata_id_rotation_rate(args->id);
2170
1e9dbc92
MW		 2171 rbuf[1] = 0xb1;
2172 rbuf[3] = 0x3c;
4bca3286
MP		 2173 rbuf[4] = media_rotation_rate >> 8;
2174 rbuf[5] = media_rotation_rate;
2175 rbuf[7] = form_factor;
1e9dbc92
MW		 2176
2177 return 0;
2178}
2179
02e0a604
MP		 2180static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2181{
2182 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2183 rbuf[1] = 0xb2;
2184 rbuf[3] = 0x4;
2185 rbuf[5] = 1 << 6; /* TPWS */
2186
2187 return 0;
2188}
2189
1da177e4 2190/**
0cba632b 2191 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2192 * @args: device IDENTIFY data / SCSI command of interest.
2193 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2194 *
2195 * No operation. Simply returns success to caller, to indicate
2196 * that the caller should successfully complete this SCSI command.
2197 *
2198 * LOCKING:
cca3974e 2199 * spin_lock_irqsave(host lock)
1da177e4 2200 */
87340e98 2201static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2202{
2203 VPRINTK("ENTER\n");
2204 return 0;
2205}
2206
1da177e4
LT		 2207/**
2208 * ata_msense_caching - Simulate MODE SENSE caching info page
2209 * @id: device IDENTIFY data
87340e98 2210 * @buf: output buffer
1da177e4
LT		 2211 *
2212 * Generate a caching info page, which conditionally indicates
2213 * write caching to the SCSI layer, depending on device
2214 * capabilities.
2215 *
2216 * LOCKING:
2217 * None.
2218 */
87340e98 2219static unsigned int ata_msense_caching(u16 *id, u8 *buf)
1da177e4 2220{
87340e98 2221 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
1da177e4 2222 if (ata_id_wcache_enabled(id))
87340e98 2223 buf[2] |= (1 << 2); /* write cache enable */
1da177e4 2224 if (!ata_id_rahead_enabled(id))
87340e98
TH		 2225 buf[12] |= (1 << 5); /* disable read ahead */
2226 return sizeof(def_cache_mpage);
1da177e4
LT		 2227}
2228
2229/**
2230 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2231 * @buf: output buffer
1da177e4
LT		 2232 *
2233 * Generate a generic MODE SENSE control mode page.
2234 *
2235 * LOCKING:
2236 * None.
2237 */
87340e98 2238static unsigned int ata_msense_ctl_mode(u8 *buf)
1da177e4 2239{
87340e98 2240 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
00ac37f5 2241 return sizeof(def_control_mpage);
1da177e4
LT		 2242}
2243
2244/**
2245 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2246 * @buf: output buffer
1da177e4
LT		 2247 *
2248 * Generate a generic MODE SENSE r/w error recovery page.
2249 *
2250 * LOCKING:
2251 * None.
2252 */
87340e98 2253static unsigned int ata_msense_rw_recovery(u8 *buf)
1da177e4 2254{
87340e98 2255 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
00ac37f5 2256 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2257}
2258
48bdc8ec
JA		 2259/*
2260 * We can turn this into a real blacklist if it's needed, for now just
2261 * blacklist any Maxtor BANC1G10 revision firmware
2262 */
2263static int ata_dev_supports_fua(u16 *id)
2264{
a0cf733b 2265 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2266
c3c013a2
JG		 2267 if (!libata_fua)
2268 return 0;
48bdc8ec
JA		 2269 if (!ata_id_has_fua(id))
2270 return 0;
2271
a0cf733b
TH		 2272 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2273 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2274
2e02671d 2275 if (strcmp(model, "Maxtor"))
48bdc8ec 2276 return 1;
2e02671d 2277 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2278 return 1;
2279
2280 return 0; /* blacklisted */
2281}
2282
1da177e4
LT		 2283/**
2284 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2285 * @args: device IDENTIFY data / SCSI command of interest.
2286 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2287 *
00ac37f5
DG		 2288 * Simulate MODE SENSE commands. Assume this is invoked for direct
2289 * access devices (e.g. disks) only. There should be no block
2290 * descriptor for other device types.
1da177e4
LT		 2291 *
2292 * LOCKING:
cca3974e 2293 * spin_lock_irqsave(host lock)
1da177e4 2294 */
87340e98 2295static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2296{
9a3dccc4 2297 struct ata_device *dev = args->dev;
87340e98 2298 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2299 const u8 sat_blk_desc[] = {
2300 0, 0, 0, 0, /* number of blocks: sat unspecified */
2301 0,
2302 0, 0x2, 0x0 /* block length: 512 bytes */
2303 };
2304 u8 pg, spg;
87340e98 2305 unsigned int ebd, page_control, six_byte;
9a3dccc4 2306 u8 dpofua;
1da177e4
LT		 2307
2308 VPRINTK("ENTER\n");
2309
2310 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2311 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2312 /*
2313 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2314 */
00ac37f5 2315
1da177e4 2316 page_control = scsicmd[2] >> 6;
ae006510
DG		 2317 switch (page_control) {
2318 case 0: /* current */
2319 break; /* supported */
2320 case 3: /* saved */
2321 goto saving_not_supp;
2322 case 1: /* changeable */
2323 case 2: /* defaults */
2324 default:
2325 goto invalid_fld;
2326 }
1da177e4 2327
87340e98
TH		 2328 if (six_byte)
2329 p += 4 + (ebd ? 8 : 0);
2330 else
2331 p += 8 + (ebd ? 8 : 0);
1da177e4 2332
00ac37f5
DG		 2333 pg = scsicmd[2] & 0x3f;
2334 spg = scsicmd[3];
2335 /*
2336 * No mode subpages supported (yet) but asking for _all_
2337 * subpages may be valid
2338 */
2339 if (spg && (spg != ALL_SUB_MPAGES))
2340 goto invalid_fld;
2341
2342 switch(pg) {
2343 case RW_RECOVERY_MPAGE:
87340e98 2344 p += ata_msense_rw_recovery(p);
1da177e4
LT		 2345 break;
2346
00ac37f5 2347 case CACHE_MPAGE:
87340e98 2348 p += ata_msense_caching(args->id, p);
1da177e4
LT		 2349 break;
2350
87340e98
TH		 2351 case CONTROL_MPAGE:
2352 p += ata_msense_ctl_mode(p);
1da177e4 2353 break;
1da177e4 2354
00ac37f5 2355 case ALL_MPAGES:
87340e98
TH		 2356 p += ata_msense_rw_recovery(p);
2357 p += ata_msense_caching(args->id, p);
2358 p += ata_msense_ctl_mode(p);
1da177e4
LT		 2359 break;
2360
2361 default: /* invalid page code */
ae006510 2362 goto invalid_fld;
1da177e4
LT		 2363 }
2364
9a3dccc4 2365 dpofua = 0;
f79d409f 2366 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2367 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2368 dpofua = 1 << 4;
2369
1da177e4 2370 if (six_byte) {
87340e98
TH		 2371 rbuf[0] = p - rbuf - 1;
2372 rbuf[2] |= dpofua;
00ac37f5 2373 if (ebd) {
87340e98
TH		 2374 rbuf[3] = sizeof(sat_blk_desc);
2375 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2376 }
1da177e4 2377 } else {
87340e98
TH		 2378 unsigned int output_len = p - rbuf - 2;
2379
1da177e4 2380 rbuf[0] = output_len >> 8;
87340e98
TH		 2381 rbuf[1] = output_len;
2382 rbuf[3] |= dpofua;
00ac37f5 2383 if (ebd) {
87340e98
TH		 2384 rbuf[7] = sizeof(sat_blk_desc);
2385 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2386 }
1da177e4 2387 }
1da177e4 2388 return 0;
ae006510
DG		 2389
2390invalid_fld:
2391 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2392 /* "Invalid field in cbd" */
2393 return 1;
2394
2395saving_not_supp:
2396 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2397 /* "Saving parameters not supported" */
2398 return 1;
1da177e4
LT		 2399}
2400
2401/**
2402 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2403 * @args: device IDENTIFY data / SCSI command of interest.
2404 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2405 *
2406 * Simulate READ CAPACITY commands.
2407 *
2408 * LOCKING:
6a36261e 2409 * None.
1da177e4 2410 */
87340e98 2411static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2412{
61d79a8e
MP		 2413 struct ata_device *dev = args->dev;
2414 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2415 u32 sector_size; /* physical sector size in bytes */
2416 u8 log2_per_phys;
2417 u16 lowest_aligned;
2418
2419 sector_size = ata_id_logical_sector_size(dev->id);
2420 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2421 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2422
2423 VPRINTK("ENTER\n");
2424
1da177e4 2425 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2426 if (last_lba >= 0xffffffffULL)
2427 last_lba = 0xffffffff;
0c144d0d 2428
1da177e4 2429 /* sector count, 32-bit */
87340e98
TH		 2430 rbuf[0] = last_lba >> (8 * 3);
2431 rbuf[1] = last_lba >> (8 * 2);
2432 rbuf[2] = last_lba >> (8 * 1);
2433 rbuf[3] = last_lba;
1da177e4
LT		 2434
2435 /* sector size */
295124dc
GG		 2436 rbuf[4] = sector_size >> (8 * 3);
2437 rbuf[5] = sector_size >> (8 * 2);
2438 rbuf[6] = sector_size >> (8 * 1);
2439 rbuf[7] = sector_size;
1da177e4
LT		 2440 } else {
2441 /* sector count, 64-bit */
87340e98
TH		 2442 rbuf[0] = last_lba >> (8 * 7);
2443 rbuf[1] = last_lba >> (8 * 6);
2444 rbuf[2] = last_lba >> (8 * 5);
2445 rbuf[3] = last_lba >> (8 * 4);
2446 rbuf[4] = last_lba >> (8 * 3);
2447 rbuf[5] = last_lba >> (8 * 2);
2448 rbuf[6] = last_lba >> (8 * 1);
2449 rbuf[7] = last_lba;
1da177e4
LT		 2450
2451 /* sector size */
295124dc
GG		 2452 rbuf[ 8] = sector_size >> (8 * 3);
2453 rbuf[ 9] = sector_size >> (8 * 2);
2454 rbuf[10] = sector_size >> (8 * 1);
2455 rbuf[11] = sector_size;
61d79a8e
MP		 2456
2457 rbuf[12] = 0;
295124dc 2458 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2459 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2460 rbuf[15] = lowest_aligned;
18f0f978 2461
e78db4df
MP		 2462 if (ata_id_has_trim(args->id)) {
2463 rbuf[14] |= 0x80; /* TPE */
2464
2465 if (ata_id_has_zero_after_trim(args->id))
2466 rbuf[14] |= 0x40; /* TPRZ */
2467 }
1da177e4
LT		 2468 }
2469
2470 return 0;
2471}
2472
2473/**
2474 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2475 * @args: device IDENTIFY data / SCSI command of interest.
2476 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2477 *
2478 * Simulate REPORT LUNS command.
2479 *
2480 * LOCKING:
cca3974e 2481 * spin_lock_irqsave(host lock)
1da177e4 2482 */
87340e98 2483static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2484{
2485 VPRINTK("ENTER\n");
2486 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2487
2488 return 0;
2489}
2490
77853bf2 2491static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2492{
74e6c8c3 2493 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2494 /* FIXME: not quite right; we don't want the
2495 * translation of taskfile registers into
2496 * a sense descriptors, since that's only
2497 * correct for ATA, not ATAPI
2498 */
750426aa 2499 ata_gen_passthru_sense(qc);
74e6c8c3 2500 }
a939c963 2501
c6e6e666 2502 qc->scsidone(qc->scsicmd);
77853bf2 2503 ata_qc_free(qc);
c6e6e666 2504}
a939c963 2505
c6e6e666
JG		 2506/* is it pointless to prefer PIO for "safety reasons"? */
2507static inline int ata_pio_use_silly(struct ata_port *ap)
2508{
2509 return (ap->flags & ATA_FLAG_PIO_DMA);
2510}
2511
2512static void atapi_request_sense(struct ata_queued_cmd *qc)
2513{
2514 struct ata_port *ap = qc->ap;
2515 struct scsi_cmnd *cmd = qc->scsicmd;
2516
2517 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2518
2519 /* FIXME: is this needed? */
7ccd720d 2520 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2521
127102ae 2522#ifdef CONFIG_ATA_SFF
855d854a
JB		 2523 if (ap->ops->sff_tf_read)
2524 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2525#endif
c6e6e666
JG		 2526
2527 /* fill these in, for the case where they are -not- overwritten */
2528 cmd->sense_buffer[0] = 0x70;
2529 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2530
2531 ata_qc_reinit(qc);
2532
93f8fecb 2533 /* setup sg table and init transfer direction */
cadb7345 2534 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2535 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2536 qc->dma_dir = DMA_FROM_DEVICE;
2537
6e7846e9 2538 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2539 qc->cdb[0] = REQUEST_SENSE;
2540 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2541
2542 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2543 qc->tf.command = ATA_CMD_PACKET;
2544
c6e6e666 2545 if (ata_pio_use_silly(ap)) {
0dc36888 2546 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2547 qc->tf.feature |= ATAPI_PKT_DMA;
2548 } else {
0dc36888 2549 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2550 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2551 qc->tf.lbah = 0;
c6e6e666 2552 }
a939c963
JG		 2553 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2554
c6e6e666 2555 qc->complete_fn = atapi_sense_complete;
a939c963 2556
8e0e694a 2557 ata_qc_issue(qc);
a939c963
JG		 2558
2559 DPRINTK("EXIT\n");
2560}
2561
77853bf2 2562static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2563{
2564 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2565 unsigned int err_mask = qc->err_mask;
1da177e4 2566
a7dac447 2567 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2568
246619da
TH		 2569 /* handle completion from new EH */
2570 if (unlikely(qc->ap->ops->error_handler &&
2571 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2572
2573 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2574 /* FIXME: not quite right; we don't want the
2575 * translation of taskfile registers into a
2576 * sense descriptors, since that's only
2577 * correct for ATA, not ATAPI
2578 */
750426aa 2579 ata_gen_passthru_sense(qc);
246619da
TH		 2580 }
2581
22aac089
TH		 2582 /* SCSI EH automatically locks door if sdev->locked is
2583 * set. Sometimes door lock request continues to
2584 * fail, for example, when no media is present. This
2585 * creates a loop - SCSI EH issues door lock which
2586 * fails and gets invoked again to acquire sense data
2587 * for the failed command.
2588 *
2589 * If door lock fails, always clear sdev->locked to
2590 * avoid this infinite loop.
2a5f07b5
TH		 2591 *
2592 * This may happen before SCSI scan is complete. Make
2593 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2594 */
2a5f07b5 2595 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2596 qc->dev->sdev->locked = 0;
2597
246619da
TH		 2598 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2599 qc->scsidone(cmd);
2600 ata_qc_free(qc);
2601 return;
2602 }
2603
2604 /* successful completion or old EH failure path */
a7dac447 2605 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2606 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2607 atapi_request_sense(qc);
77853bf2 2608 return;
74e6c8c3 2609 } else if (unlikely(err_mask)) {
a7dac447
JG		 2610 /* FIXME: not quite right; we don't want the
2611 * translation of taskfile registers into
2612 * a sense descriptors, since that's only
2613 * correct for ATA, not ATAPI
2614 */
750426aa 2615 ata_gen_passthru_sense(qc);
74e6c8c3 2616 } else {
1da177e4
LT		 2617 u8 *scsicmd = cmd->cmnd;
2618
fd71da46 2619 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2620 unsigned long flags;
87340e98 2621 u8 *buf;
b445c568 2622
87340e98 2623 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2624
2625 /* ATAPI devices typically report zero for their SCSI version,
2626 * and sometimes deviate from the spec WRT response data
2627 * format. If SCSI version is reported as zero like normal,
2628 * then we make the following fixups: 1) Fake MMC-5 version,
2629 * to indicate to the Linux scsi midlayer this is a modern
2630 * device. 2) Ensure response data format / ATAPI information
2631 * are always correct.
a15dbeb4
JG		 2632 */
2633 if (buf[2] == 0) {
2634 buf[2] = 0x5;
2635 buf[3] = 0x32;
2636 }
2637
87340e98 2638 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2639 }
a15dbeb4 2640
1da177e4
LT		 2641 cmd->result = SAM_STAT_GOOD;
2642 }
2643
2644 qc->scsidone(cmd);
77853bf2 2645 ata_qc_free(qc);
1da177e4
LT		 2646}
2647/**
2648 * atapi_xlat - Initialize PACKET taskfile
2649 * @qc: command structure to be initialized
1da177e4
LT		 2650 *
2651 * LOCKING:
cca3974e 2652 * spin_lock_irqsave(host lock)
1da177e4
LT		 2653 *
2654 * RETURNS:
2655 * Zero on success, non-zero on failure.
2656 */
ad706991 2657static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2658{
542b1444 2659 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2660 struct ata_device *dev = qc->dev;
542b1444 2661 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2662 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2663 unsigned int nbytes;
1da177e4 2664
2e5704f6
TH		 2665 memset(qc->cdb, 0, dev->cdb_len);
2666 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2667
2668 qc->complete_fn = atapi_qc_complete;
2669
2670 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2671 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2672 qc->tf.flags |= ATA_TFLAG_WRITE;
2673 DPRINTK("direction: write\n");
2674 }
2675
2676 qc->tf.command = ATA_CMD_PACKET;
aacda375 2677 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2678
2679 /* check whether ATAPI DMA is safe */
5895ef9a 2680 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2681 using_pio = 1;
1da177e4 2682
e190222d
TH		 2683 /* Some controller variants snoop this value for Packet
2684 * transfers to do state machine and FIFO management. Thus we
2685 * want to set it properly, and for DMA where it is
2686 * effectively meaningless.
2687 */
aacda375 2688 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2689
e190222d
TH		 2690 /* Most ATAPI devices which honor transfer chunk size don't
2691 * behave according to the spec when odd chunk size which
2692 * matches the transfer length is specified. If the number of
2693 * bytes to transfer is 2n+1. According to the spec, what
2694 * should happen is to indicate that 2n+1 is going to be
2695 * transferred and transfer 2n+2 bytes where the last byte is
2696 * padding.
2697 *
2698 * In practice, this doesn't happen. ATAPI devices first
2699 * indicate and transfer 2n bytes and then indicate and
2700 * transfer 2 bytes where the last byte is padding.
2701 *
2702 * This inconsistency confuses several controllers which
2703 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2704 * These controllers use actual number of transferred bytes to
2705 * update DMA poitner and transfer of 4n+2 bytes make those
2706 * controller push DMA pointer by 4n+4 bytes because SATA data
2707 * FISes are aligned to 4 bytes. This causes data corruption
2708 * and buffer overrun.
2709 *
2710 * Always setting nbytes to even number solves this problem
2711 * because then ATAPI devices don't have to split data at 2n
2712 * boundaries.
2713 */
2714 if (nbytes & 0x1)
2715 nbytes++;
2716
2db78dd3
AC		 2717 qc->tf.lbam = (nbytes & 0xFF);
2718 qc->tf.lbah = (nbytes >> 8);
2719
5895ef9a
TH		 2720 if (nodata)
2721 qc->tf.protocol = ATAPI_PROT_NODATA;
2722 else if (using_pio)
2723 qc->tf.protocol = ATAPI_PROT_PIO;
2724 else {
e00f1ff3 2725 /* DMA data xfer */
0dc36888 2726 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2727 qc->tf.feature |= ATAPI_PKT_DMA;
2728
91163006
TH		 2729 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2730 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2731 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2732 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2733 }
2734
2db78dd3
AC		 2735
2736 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2737 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2738 return 0;
2739}
2740
2dcb407e 2741static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2742{
071f44b1 2743 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2744 if (likely(devno < ata_link_max_devices(&ap->link)))
2745 return &ap->link.device[devno];
2746 } else {
2747 if (likely(devno < ap->nr_pmp_links))
2748 return &ap->pmp_link[devno].device[0];
2749 }
2750
ab5b3a5b
TH		 2751 return NULL;
2752}
2753
2dcb407e
JG		 2754static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2755 const struct scsi_device *scsidev)
ab5b3a5b 2756{
41bda9c9
TH		 2757 int devno;
2758
ab5b3a5b 2759 /* skip commands not addressed to targets we simulate */
071f44b1 2760 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2761 if (unlikely(scsidev->channel || scsidev->lun))
2762 return NULL;
2763 devno = scsidev->id;
2764 } else {
2765 if (unlikely(scsidev->id || scsidev->lun))
2766 return NULL;
2767 devno = scsidev->channel;
2768 }
ab5b3a5b 2769
41bda9c9 2770 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2771}
2772
1da177e4
LT		 2773/**
2774 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2775 * @ap: ATA port to which the device is attached
2776 * @scsidev: SCSI device from which we derive the ATA device
2777 *
2778 * Given various information provided in struct scsi_cmnd,
2779 * map that onto an ATA bus, and using that mapping
2780 * determine which ata_device is associated with the
2781 * SCSI command to be sent.
2782 *
2783 * LOCKING:
cca3974e 2784 * spin_lock_irqsave(host lock)
1da177e4
LT		 2785 *
2786 * RETURNS:
2787 * Associated ATA device, or %NULL if not found.
2788 */
1da177e4 2789static struct ata_device *
057ace5e 2790ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2791{
ab5b3a5b 2792 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2793
2486fa56 2794 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2795 return NULL;
2796
1da177e4
LT		 2797 return dev;
2798}
2799
b095518e
JG		 2800/*
2801 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2802 * @byte1: Byte 1 from pass-thru CDB.
2803 *
2804 * RETURNS:
2805 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2806 */
2807static u8
2808ata_scsi_map_proto(u8 byte1)
2809{
2810 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2811 case 3: /* Non-data */
2812 return ATA_PROT_NODATA;
2813
2814 case 6: /* DMA */
2815 case 10: /* UDMA Data-in */
2816 case 11: /* UDMA Data-Out */
2817 return ATA_PROT_DMA;
2818
2819 case 4: /* PIO Data-in */
2820 case 5: /* PIO Data-out */
2821 return ATA_PROT_PIO;
2822
2823 case 0: /* Hard Reset */
2824 case 1: /* SRST */
2825 case 8: /* Device Diagnostic */
2826 case 9: /* Device Reset */
2827 case 7: /* DMA Queued */
2828 case 12: /* FPDMA */
2829 case 15: /* Return Response Info */
2830 default: /* Reserved */
2831 break;
b095518e
JG		 2832 }
2833
2834 return ATA_PROT_UNKNOWN;
2835}
2836
2837/**
2838 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2839 * @qc: command structure to be initialized
b095518e
JG		 2840 *
2841 * Handles either 12 or 16-byte versions of the CDB.
2842 *
2843 * RETURNS:
2844 * Zero on success, non-zero on failure.
2845 */
ad706991 2846static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2847{
2848 struct ata_taskfile *tf = &(qc->tf);
542b1444 2849 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2850 struct ata_device *dev = qc->dev;
ad706991 2851 const u8 *cdb = scmd->cmnd;
b095518e 2852
542b1444 2853 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2854 goto invalid_fld;
8190bdb9 2855
b095518e
JG		 2856 /*
2857 * 12 and 16 byte CDBs use different offsets to
2858 * provide the various register values.
2859 */
542b1444 2860 if (cdb[0] == ATA_16) {
b095518e
JG		 2861 /*
2862 * 16-byte CDB - may contain extended commands.
2863 *
2864 * If that is the case, copy the upper byte register values.
2865 */
542b1444
TH		 2866 if (cdb[1] & 0x01) {
2867 tf->hob_feature = cdb[3];
2868 tf->hob_nsect = cdb[5];
2869 tf->hob_lbal = cdb[7];
2870 tf->hob_lbam = cdb[9];
2871 tf->hob_lbah = cdb[11];
b095518e
JG		 2872 tf->flags |= ATA_TFLAG_LBA48;
2873 } else
2874 tf->flags &= ~ATA_TFLAG_LBA48;
2875
2876 /*
2877 * Always copy low byte, device and command registers.
2878 */
542b1444
TH		 2879 tf->feature = cdb[4];
2880 tf->nsect = cdb[6];
2881 tf->lbal = cdb[8];
2882 tf->lbam = cdb[10];
2883 tf->lbah = cdb[12];
2884 tf->device = cdb[13];
2885 tf->command = cdb[14];
b095518e
JG		 2886 } else {
2887 /*
2888 * 12-byte CDB - incapable of extended commands.
2889 */
2890 tf->flags &= ~ATA_TFLAG_LBA48;
2891
542b1444
TH		 2892 tf->feature = cdb[3];
2893 tf->nsect = cdb[4];
2894 tf->lbal = cdb[5];
2895 tf->lbam = cdb[6];
2896 tf->lbah = cdb[7];
2897 tf->device = cdb[8];
2898 tf->command = cdb[9];
b095518e 2899 }
fa4453c4
AL		 2900
2901 /* enforce correct master/slave bit */
2902 tf->device = dev->devno ?
2903 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2904
bd30add8 2905 switch (tf->command) {
295124dc 2906 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 2907 case ATA_CMD_READ_LONG:
2908 case ATA_CMD_READ_LONG_ONCE:
2909 case ATA_CMD_WRITE_LONG:
2910 case ATA_CMD_WRITE_LONG_ONCE:
2911 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2912 goto invalid_fld;
2913 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 2914 break;
2915
2916 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2917 case ATA_CMD_CFA_WRITE_NE:
2918 case ATA_CMD_CFA_TRANS_SECT:
2919 case ATA_CMD_CFA_WRITE_MULT_NE:
2920 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2921 case ATA_CMD_READ:
2922 case ATA_CMD_READ_EXT:
2923 case ATA_CMD_READ_QUEUED:
2924 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2925 case ATA_CMD_FPDMA_READ:
2926 case ATA_CMD_READ_MULTI:
2927 case ATA_CMD_READ_MULTI_EXT:
2928 case ATA_CMD_PIO_READ:
2929 case ATA_CMD_PIO_READ_EXT:
2930 case ATA_CMD_READ_STREAM_DMA_EXT:
2931 case ATA_CMD_READ_STREAM_EXT:
2932 case ATA_CMD_VERIFY:
2933 case ATA_CMD_VERIFY_EXT:
2934 case ATA_CMD_WRITE:
2935 case ATA_CMD_WRITE_EXT:
2936 case ATA_CMD_WRITE_FUA_EXT:
2937 case ATA_CMD_WRITE_QUEUED:
2938 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2939 case ATA_CMD_FPDMA_WRITE:
2940 case ATA_CMD_WRITE_MULTI:
2941 case ATA_CMD_WRITE_MULTI_EXT:
2942 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2943 case ATA_CMD_PIO_WRITE:
2944 case ATA_CMD_PIO_WRITE_EXT:
2945 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2946 case ATA_CMD_WRITE_STREAM_EXT:
2947 qc->sect_size = scmd->device->sector_size;
2948 break;
2949
2950 /* Everything else uses 512 byte "sectors" */
2951 default:
2952 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 2953 }
2954
2955 /*
2956 * Set flags so that all registers will be written, pass on
2957 * write indication (used for PIO/DMA setup), result TF is
2958 * copied back and we don't whine too much about its failure.
2959 */
bc496ed0 2960 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 2961 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2962 tf->flags |= ATA_TFLAG_WRITE;
2963
2964 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2965
2966 /*
2967 * Set transfer length.
2968 *
2969 * TODO: find out if we need to do more here to
2970 * cover scatter/gather case.
2971 */
2972 ata_qc_set_pc_nbytes(qc);
2973
2974 /* We may not issue DMA commands if no DMA mode is set */
2975 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2976 goto invalid_fld;
2977
1dce589c
AL		 2978 /* sanity check for pio multi commands */
2979 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2980 goto invalid_fld;
2981
2982 if (is_multi_taskfile(tf)) {
2983 unsigned int multi_count = 1 << (cdb[1] >> 5);
2984
2985 /* compare the passed through multi_count
2986 * with the cached multi_count of libata
2987 */
2988 if (multi_count != dev->multi_count)
a9a79dfe
JP		 2989 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
2990 multi_count);
d26fc955 2991 }
1dce589c 2992
b095518e
JG		 2993 /*
2994 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2995 * SET_FEATURES - XFER MODE must be preceded/succeeded
2996 * by an update to hardware-specific registers for each
2997 * controller (i.e. the reason for ->set_piomode(),
2998 * ->set_dmamode(), and ->post_set_mode() hooks).
2999 */
bd30add8
TH		 3000 if (tf->command == ATA_CMD_SET_FEATURES &&
3001 tf->feature == SETFEATURES_XFER)
9a405257 3002 goto invalid_fld;
b095518e
JG		 3003
3004 /*
bd30add8
TH		 3005 * Filter TPM commands by default. These provide an
3006 * essentially uncontrolled encrypted "back door" between
3007 * applications and the disk. Set libata.allow_tpm=1 if you
3008 * have a real reason for wanting to use them. This ensures
3009 * that installed software cannot easily mess stuff up without
3010 * user intent. DVR type users will probably ship with this enabled
3011 * for movie content management.
b095518e 3012 *
bd30add8
TH		 3013 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3014 * for this and should do in future but that it is not sufficient as
3015 * DCS is an optional feature set. Thus we also do the software filter
3016 * so that we comply with the TC consortium stated goal that the user
3017 * can turn off TC features of their system.
b095518e 3018 */
bd30add8
TH		 3019 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3020 goto invalid_fld;
e61e0672 3021
b095518e 3022 return 0;
9a405257
TH		 3023
3024 invalid_fld:
542b1444 3025 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 3026 /* "Invalid field in cdb" */
3027 return 1;
b095518e
JG		 3028}
3029
18f0f978
CH		 3030static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3031{
3032 struct ata_taskfile *tf = &qc->tf;
3033 struct scsi_cmnd *scmd = qc->scsicmd;
3034 struct ata_device *dev = qc->dev;
3035 const u8 *cdb = scmd->cmnd;
3036 u64 block;
3037 u32 n_block;
3038 u32 size;
3039 void *buf;
3040
3041 /* we may not issue DMA commands if no DMA mode is set */
3042 if (unlikely(!dev->dma_mode))
3043 goto invalid_fld;
3044
3045 if (unlikely(scmd->cmd_len < 16))
3046 goto invalid_fld;
3047 scsi_16_lba_len(cdb, &block, &n_block);
3048
3049 /* for now we only support WRITE SAME with the unmap bit set */
3050 if (unlikely(!(cdb[1] & 0x8)))
3051 goto invalid_fld;
3052
3053 /*
3054 * WRITE SAME always has a sector sized buffer as payload, this
3055 * should never be a multiple entry S/G list.
3056 */
3057 if (!scsi_sg_count(scmd))
3058 goto invalid_fld;
3059
3060 buf = page_address(sg_page(scsi_sglist(scmd)));
d0634c4a 3061 size = ata_set_lba_range_entries(buf, 512, block, n_block);
18f0f978
CH		 3062
3063 tf->protocol = ATA_PROT_DMA;
3064 tf->hob_feature = 0;
3065 tf->feature = ATA_DSM_TRIM;
3066 tf->hob_nsect = (size / 512) >> 8;
3067 tf->nsect = size / 512;
3068 tf->command = ATA_CMD_DSM;
3069 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3070 ATA_TFLAG_WRITE;
3071
3072 ata_qc_set_pc_nbytes(qc);
3073
3074 return 0;
3075
3076 invalid_fld:
3077 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3078 /* "Invalid field in cdb" */
3079 return 1;
3080}
3081
1da177e4
LT		 3082/**
3083 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3084 * @dev: ATA device
3085 * @cmd: SCSI command opcode to consider
3086 *
3087 * Look up the SCSI command given, and determine whether the
3088 * SCSI command is to be translated or simulated.
3089 *
3090 * RETURNS:
3091 * Pointer to translation function if possible, %NULL if not.
3092 */
3093
3094static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3095{
3096 switch (cmd) {
3097 case READ_6:
3098 case READ_10:
3099 case READ_16:
3100
3101 case WRITE_6:
3102 case WRITE_10:
3103 case WRITE_16:
3104 return ata_scsi_rw_xlat;
3105
0cdd6eb7 3106 case WRITE_SAME_16:
18f0f978
CH		 3107 return ata_scsi_write_same_xlat;
3108
1da177e4
LT		 3109 case SYNCHRONIZE_CACHE:
3110 if (ata_try_flush_cache(dev))
3111 return ata_scsi_flush_xlat;
3112 break;
3113
3114 case VERIFY:
3115 case VERIFY_16:
3116 return ata_scsi_verify_xlat;
b095518e
JG		 3117
3118 case ATA_12:
3119 case ATA_16:
3120 return ata_scsi_pass_thru;
da61396d 3121
972dcafb
DG		 3122 case START_STOP:
3123 return ata_scsi_start_stop_xlat;
1da177e4
LT		 3124 }
3125
3126 return NULL;
3127}
3128
3129/**
3130 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3131 * @ap: ATA port to which the command was being sent
3132 * @cmd: SCSI command to dump
3133 *
3134 * Prints the contents of a SCSI command via printk().
3135 */
3136
3137static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3138 struct scsi_cmnd *cmd)
3139{
3140#ifdef ATA_DEBUG
3141 struct scsi_device *scsidev = cmd->device;
3142 u8 *scsicmd = cmd->cmnd;
3143
3144 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 3145 ap->print_id,
1da177e4
LT		 3146 scsidev->channel, scsidev->id, scsidev->lun,
3147 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3148 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3149 scsicmd[8]);
3150#endif
3151}
3152
542b1444 3153static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 3154 struct ata_device *dev)
eb3f0f9c 3155{
baf4fdfa
ML		 3156 u8 scsi_op = scmd->cmnd[0];
3157 ata_xlat_func_t xlat_func;
2115ea94
TH		 3158 int rc = 0;
3159
eb3f0f9c 3160 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 3161 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3162 goto bad_cdb_len;
eb3f0f9c 3163
baf4fdfa
ML		 3164 xlat_func = ata_get_xlat_func(dev, scsi_op);
3165 } else {
3166 if (unlikely(!scmd->cmd_len))
3167 goto bad_cdb_len;
3168
3169 xlat_func = NULL;
3170 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3171 /* relay SCSI command to ATAPI device */
607126c2
ML		 3172 int len = COMMAND_SIZE(scsi_op);
3173 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3174 goto bad_cdb_len;
3175
3176 xlat_func = atapi_xlat;
3177 } else {
3178 /* ATA_16 passthru, treat as an ATA command */
3179 if (unlikely(scmd->cmd_len > 16))
3180 goto bad_cdb_len;
3181
3182 xlat_func = ata_get_xlat_func(dev, scsi_op);
3183 }
3184 }
3185
3186 if (xlat_func)
b27dcfb0 3187 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 3188 else
b27dcfb0 3189 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 3190
3191 return rc;
baf4fdfa
ML		 3192
3193 bad_cdb_len:
3194 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3195 scmd->cmd_len, scsi_op, dev->cdb_len);
3196 scmd->result = DID_ERROR << 16;
b27dcfb0 3197 scmd->scsi_done(scmd);
baf4fdfa 3198 return 0;
eb3f0f9c
BK		 3199}
3200
1da177e4
LT		 3201/**
3202 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 3203 * @shost: SCSI host of command to be sent
1da177e4 3204 * @cmd: SCSI command to be sent
1da177e4
LT		 3205 *
3206 * In some cases, this function translates SCSI commands into
3207 * ATA taskfiles, and queues the taskfiles to be sent to
3208 * hardware. In other cases, this function simulates a
3209 * SCSI device by evaluating and responding to certain
3210 * SCSI commands. This creates the overall effect of
3211 * ATA and ATAPI devices appearing as SCSI devices.
3212 *
3213 * LOCKING:
23e701e6 3214 * ATA host lock
1da177e4
LT		 3215 *
3216 * RETURNS:
2115ea94
TH		 3217 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3218 * 0 otherwise.
1da177e4 3219 */
23e701e6 3220int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 3221{
3222 struct ata_port *ap;
3223 struct ata_device *dev;
3224 struct scsi_device *scsidev = cmd->device;
2115ea94 3225 int rc = 0;
23e701e6 3226 unsigned long irq_flags;
1da177e4 3227
35bb94b1 3228 ap = ata_shost_to_port(shost);
005a5a06 3229
23e701e6 3230 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 3231
3232 ata_scsi_dump_cdb(ap, cmd);
3233
3234 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3235 if (likely(dev))
b27dcfb0 3236 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 3237 else {
1da177e4 3238 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 3239 cmd->scsi_done(cmd);
1da177e4
LT		 3240 }
3241
23e701e6
JG		 3242 spin_unlock_irqrestore(ap->lock, irq_flags);
3243
2115ea94 3244 return rc;
1da177e4
LT		 3245}
3246
3247/**
3248 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3249 * @dev: the target device
1da177e4 3250 * @cmd: SCSI command being sent to device.
1da177e4
LT		 3251 *
3252 * Interprets and directly executes a select list of SCSI commands
3253 * that can be handled internally.
3254 *
3255 * LOCKING:
cca3974e 3256 * spin_lock_irqsave(host lock)
1da177e4
LT		 3257 */
3258
b27dcfb0 3259void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 3260{
3261 struct ata_scsi_args args;
057ace5e 3262 const u8 *scsicmd = cmd->cmnd;
45394145 3263 u8 tmp8;
1da177e4 3264
9a3dccc4
TH		 3265 args.dev = dev;
3266 args.id = dev->id;
1da177e4 3267 args.cmd = cmd;
b27dcfb0 3268 args.done = cmd->scsi_done;
1da177e4
LT		 3269
3270 switch(scsicmd[0]) {
2dcb407e
JG		 3271 /* TODO: worth improving? */
3272 case FORMAT_UNIT:
b27dcfb0 3273 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3274 break;
3275
3276 case INQUIRY:
3277 if (scsicmd[1] & 2) /* is CmdDt set? */
b27dcfb0 3278 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3279 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3280 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3281 else switch (scsicmd[2]) {
3282 case 0x00:
3283 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3284 break;
2dcb407e
JG		 3285 case 0x80:
3286 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3287 break;
2dcb407e
JG		 3288 case 0x83:
3289 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3290 break;
2dcb407e
JG		 3291 case 0x89:
3292 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3293 break;
18f0f978
CH		 3294 case 0xb0:
3295 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3296 break;
1e9dbc92
MW		 3297 case 0xb1:
3298 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3299 break;
02e0a604
MP		 3300 case 0xb2:
3301 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3302 break;
2dcb407e 3303 default:
b27dcfb0 3304 ata_scsi_invalid_field(cmd);
1da177e4 3305 break;
2dcb407e
JG		 3306 }
3307 break;
3308
3309 case MODE_SENSE:
3310 case MODE_SENSE_10:
3311 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3312 break;
3313
3314 case MODE_SELECT: /* unconditionally return */
3315 case MODE_SELECT_10: /* bad-field-in-cdb */
b27dcfb0 3316 ata_scsi_invalid_field(cmd);
2dcb407e 3317 break;
1da177e4 3318
2dcb407e
JG		 3319 case READ_CAPACITY:
3320 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3321 break;
3322
3323 case SERVICE_ACTION_IN:
3324 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3325 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 3326 else
b27dcfb0 3327 ata_scsi_invalid_field(cmd);
2dcb407e 3328 break;
1da177e4 3329
2dcb407e
JG		 3330 case REPORT_LUNS:
3331 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3332 break;
1da177e4 3333
2dcb407e
JG		 3334 case REQUEST_SENSE:
3335 ata_scsi_set_sense(cmd, 0, 0, 0);
3336 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 3337 cmd->scsi_done(cmd);
2dcb407e 3338 break;
1da177e4 3339
2dcb407e
JG		 3340 /* if we reach this, then writeback caching is disabled,
3341 * turning this into a no-op.
3342 */
3343 case SYNCHRONIZE_CACHE:
3344 /* fall through */
3345
3346 /* no-op's, complete with success */
3347 case REZERO_UNIT:
3348 case SEEK_6:
3349 case SEEK_10:
3350 case TEST_UNIT_READY:
3351 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3352 break;
45394145 3353
2dcb407e
JG		 3354 case SEND_DIAGNOSTIC:
3355 tmp8 = scsicmd[1] & ~(1 << 3);
3356 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3357 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 3358 else
b27dcfb0 3359 ata_scsi_invalid_field(cmd);
2dcb407e 3360 break;
1da177e4 3361
2dcb407e
JG		 3362 /* all other commands */
3363 default:
3364 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3365 /* "Invalid command operation code" */
b27dcfb0 3366 cmd->scsi_done(cmd);
2dcb407e 3367 break;
1da177e4
LT		 3368 }
3369}
3370
f3187195
TH		 3371int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3372{
3373 int i, rc;
3374
3375 for (i = 0; i < host->n_ports; i++) {
3376 struct ata_port *ap = host->ports[i];
3377 struct Scsi_Host *shost;
3378
3379 rc = -ENOMEM;
3380 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3381 if (!shost)
3382 goto err_alloc;
3383
9ee4f393 3384 shost->eh_noresume = 1;
f3187195
TH		 3385 *(struct ata_port **)&shost->hostdata[0] = ap;
3386 ap->scsi_host = shost;
3387
d9027470 3388 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 3389 shost->unique_id = ap->print_id;
3390 shost->max_id = 16;
3391 shost->max_lun = 1;
3392 shost->max_channel = 1;
3393 shost->max_cmd_len = 16;
3394
31cc23b3
TH		 3395 /* Schedule policy is determined by ->qc_defer()
3396 * callback and it needs to see every deferred qc.
3397 * Set host_blocked to 1 to prevent SCSI midlayer from
3398 * automatically deferring requests.
3399 */
3400 shost->max_host_blocked = 1;
3401
f8fc75dc
LM		 3402 rc = scsi_add_host_with_dma(ap->scsi_host,
3403 &ap->tdev, ap->host->dev);
f3187195
TH		 3404 if (rc)
3405 goto err_add;
3406 }
3407
3408 return 0;
3409
3410 err_add:
3411 scsi_host_put(host->ports[i]->scsi_host);
3412 err_alloc:
3413 while (--i >= 0) {
3414 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3415
3416 scsi_remove_host(shost);
3417 scsi_host_put(shost);
3418 }
3419 return rc;
3420}
3421
1ae46317 3422void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3423{
1ae46317
TH		 3424 int tries = 5;
3425 struct ata_device *last_failed_dev = NULL;
41bda9c9 3426 struct ata_link *link;
1ae46317 3427 struct ata_device *dev;
644dd0cc 3428
1ae46317 3429 repeat:
1eca4365
TH		 3430 ata_for_each_link(link, ap, EDGE) {
3431 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3432 struct scsi_device *sdev;
3433 int channel = 0, id = 0;
3edebac4 3434
1eca4365 3435 if (dev->sdev)
41bda9c9 3436 continue;
3f19ee8c 3437
41bda9c9
TH		 3438 if (ata_is_host_link(link))
3439 id = dev->devno;
3440 else
3441 channel = link->pmp;
3442
3443 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3444 NULL);
3445 if (!IS_ERR(sdev)) {
3446 dev->sdev = sdev;
3447 scsi_device_put(sdev);
295124dc
GG		 3448 } else {
3449 dev->sdev = NULL;
41bda9c9 3450 }
3edebac4 3451 }
3f19ee8c 3452 }
1ae46317
TH		 3453
3454 /* If we scanned while EH was in progress or allocation
3455 * failure occurred, scan would have failed silently. Check
3456 * whether all devices are attached.
3457 */
1eca4365
TH		 3458 ata_for_each_link(link, ap, EDGE) {
3459 ata_for_each_dev(dev, link, ENABLED) {
3460 if (!dev->sdev)
41bda9c9
TH		 3461 goto exit_loop;
3462 }
1ae46317 3463 }
41bda9c9
TH		 3464 exit_loop:
3465 if (!link)
1ae46317
TH		 3466 return;
3467
3468 /* we're missing some SCSI devices */
3469 if (sync) {
3470 /* If caller requested synchrnous scan && we've made
3471 * any progress, sleep briefly and repeat.
3472 */
3473 if (dev != last_failed_dev) {
3474 msleep(100);
3475 last_failed_dev = dev;
3476 goto repeat;
3477 }
3478
3479 /* We might be failing to detect boot device, give it
3480 * a few more chances.
3481 */
3482 if (--tries) {
3483 msleep(100);
3484 goto repeat;
3485 }
3486
a9a79dfe
JP		 3487 ata_port_err(ap,
3488 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 3489 }
3490
ad72cf98 3491 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 3492 round_jiffies_relative(HZ));
644dd0cc 3493}
0ea035a3
TH		 3494
3495/**
3496 * ata_scsi_offline_dev - offline attached SCSI device
3497 * @dev: ATA device to offline attached SCSI device for
3498 *
3499 * This function is called from ata_eh_hotplug() and responsible
3500 * for taking the SCSI device attached to @dev offline. This
cca3974e 3501 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3502 * against clearing.
3503 *
3504 * LOCKING:
cca3974e 3505 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3506 *
3507 * RETURNS:
3508 * 1 if attached SCSI device exists, 0 otherwise.
3509 */
3510int ata_scsi_offline_dev(struct ata_device *dev)
3511{
3512 if (dev->sdev) {
3513 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3514 return 1;
3515 }
3516 return 0;
3517}
580b2102
TH		 3518
3519/**
3520 * ata_scsi_remove_dev - remove attached SCSI device
3521 * @dev: ATA device to remove attached SCSI device for
3522 *
3523 * This function is called from ata_eh_scsi_hotplug() and
3524 * responsible for removing the SCSI device attached to @dev.
3525 *
3526 * LOCKING:
3527 * Kernel thread context (may sleep).
3528 */
3529static void ata_scsi_remove_dev(struct ata_device *dev)
3530{
9af5c9c9 3531 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3532 struct scsi_device *sdev;
3533 unsigned long flags;
3534
3535 /* Alas, we need to grab scan_mutex to ensure SCSI device
3536 * state doesn't change underneath us and thus
3537 * scsi_device_get() always succeeds. The mutex locking can
3538 * be removed if there is __scsi_device_get() interface which
3539 * increments reference counts regardless of device state.
3540 */
cca3974e 3541 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3542 spin_lock_irqsave(ap->lock, flags);
580b2102 3543
cca3974e 3544 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3545 sdev = dev->sdev;
3546 dev->sdev = NULL;
3547
3548 if (sdev) {
3549 /* If user initiated unplug races with us, sdev can go
cca3974e 3550 * away underneath us after the host lock and
580b2102
TH		 3551 * scan_mutex are released. Hold onto it.
3552 */
3553 if (scsi_device_get(sdev) == 0) {
3554 /* The following ensures the attached sdev is
3555 * offline on return from ata_scsi_offline_dev()
3556 * regardless it wins or loses the race
3557 * against this function.
3558 */
3559 scsi_device_set_state(sdev, SDEV_OFFLINE);
3560 } else {
3561 WARN_ON(1);
3562 sdev = NULL;
3563 }
3564 }
3565
ba6a1308 3566 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3567 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3568
3569 if (sdev) {
a9a79dfe
JP		 3570 ata_dev_info(dev, "detaching (SCSI %s)\n",
3571 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3572
3573 scsi_remove_device(sdev);
3574 scsi_device_put(sdev);
3575 }
3576}
3577
41bda9c9
TH		 3578static void ata_scsi_handle_link_detach(struct ata_link *link)
3579{
3580 struct ata_port *ap = link->ap;
3581 struct ata_device *dev;
3582
1eca4365 3583 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3584 unsigned long flags;
3585
3586 if (!(dev->flags & ATA_DFLAG_DETACHED))
3587 continue;
3588
3589 spin_lock_irqsave(ap->lock, flags);
3590 dev->flags &= ~ATA_DFLAG_DETACHED;
3591 spin_unlock_irqrestore(ap->lock, flags);
3592
3593 ata_scsi_remove_dev(dev);
3594 }
3595}
3596
2f294968
KCA		 3597/**
3598 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3599 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3600 *
3601 * Tell the block layer to send a media change notification
3602 * event.
3603 *
3604 * LOCKING:
854c73a2 3605 * spin_lock_irqsave(host lock)
2f294968 3606 */
854c73a2 3607void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3608{
854c73a2 3609 if (dev->sdev)
f26792d5
JG		 3610 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3611 GFP_ATOMIC);
2f294968 3612}
2f294968 3613
580b2102
TH		 3614/**
3615 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3616 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3617 *
3618 * Perform SCSI part of hotplug. It's executed from a separate
3619 * workqueue after EH completes. This is necessary because SCSI
3620 * hot plugging requires working EH and hot unplugging is
3621 * synchronized with hot plugging with a mutex.
3622 *
3623 * LOCKING:
3624 * Kernel thread context (may sleep).
3625 */
65f27f38 3626void ata_scsi_hotplug(struct work_struct *work)
580b2102 3627{
65f27f38
DH		 3628 struct ata_port *ap =
3629 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3630 int i;
580b2102 3631
b51e9e5d 3632 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3633 DPRINTK("ENTER/EXIT - unloading\n");
3634 return;
3635 }
3636
3637 DPRINTK("ENTER\n");
ad72cf98 3638 mutex_lock(&ap->scsi_scan_mutex);
580b2102 3639
41bda9c9
TH		 3640 /* Unplug detached devices. We cannot use link iterator here
3641 * because PMP links have to be scanned even if PMP is
3642 * currently not attached. Iterate manually.
3643 */
3644 ata_scsi_handle_link_detach(&ap->link);
3645 if (ap->pmp_link)
3646 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3647 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3648
3649 /* scan for new ones */
1ae46317 3650 ata_scsi_scan_host(ap, 0);
580b2102 3651
ad72cf98 3652 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 3653 DPRINTK("EXIT\n");
3654}
83c47bcb
TH		 3655
3656/**
3657 * ata_scsi_user_scan - indication for user-initiated bus scan
3658 * @shost: SCSI host to scan
3659 * @channel: Channel to scan
3660 * @id: ID to scan
3661 * @lun: LUN to scan
3662 *
3663 * This function is called when user explicitly requests bus
3664 * scan. Set probe pending flag and invoke EH.
3665 *
3666 * LOCKING:
3667 * SCSI layer (we don't care)
3668 *
3669 * RETURNS:
3670 * Zero.
3671 */
d9027470
GG		 3672int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3673 unsigned int id, unsigned int lun)
83c47bcb
TH		 3674{
3675 struct ata_port *ap = ata_shost_to_port(shost);
3676 unsigned long flags;
41bda9c9 3677 int devno, rc = 0;
83c47bcb
TH		 3678
3679 if (!ap->ops->error_handler)
3680 return -EOPNOTSUPP;
3681
41bda9c9 3682 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3683 return -EINVAL;
3684
071f44b1 3685 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3686 if (channel != SCAN_WILD_CARD && channel)
3687 return -EINVAL;
3688 devno = id;
3689 } else {
3690 if (id != SCAN_WILD_CARD && id)
3691 return -EINVAL;
3692 devno = channel;
3693 }
3694
ba6a1308 3695 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3696
41bda9c9
TH		 3697 if (devno == SCAN_WILD_CARD) {
3698 struct ata_link *link;
3699
1eca4365 3700 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3701 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3702 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3703 ehi->action |= ATA_EH_RESET;
41bda9c9 3704 }
83c47bcb 3705 } else {
41bda9c9 3706 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3707
3708 if (dev) {
41bda9c9 3709 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3710 ehi->probe_mask |= 1 << dev->devno;
cf480626 3711 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3712 } else
3713 rc = -EINVAL;
3714 }
3715
309afcb5 3716 if (rc == 0) {
83c47bcb 3717 ata_port_schedule_eh(ap);
309afcb5
TH		 3718 spin_unlock_irqrestore(ap->lock, flags);
3719 ata_port_wait_eh(ap);
3720 } else
3721 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3722
3723 return rc;
3724}
3057ac3c 3725
3726/**
d0171269 3727 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3728 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3729 *
d0171269 3730 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 3731 * libata need to propagate the changes to SCSI layer.
3057ac3c 3732 *
d0171269
TH		 3733 * LOCKING:
3734 * Kernel thread context (may sleep).
3057ac3c 3735 */
65f27f38 3736void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3737{
65f27f38
DH		 3738 struct ata_port *ap =
3739 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3740 struct ata_link *link;
f58229f8 3741 struct ata_device *dev;
f84e7e41 3742 unsigned long flags;
3057ac3c 3743
ad72cf98 3744 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 3745 spin_lock_irqsave(ap->lock, flags);
3746
1eca4365
TH		 3747 ata_for_each_link(link, ap, EDGE) {
3748 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3749 struct scsi_device *sdev = dev->sdev;
3057ac3c 3750
1eca4365 3751 if (!sdev)
41bda9c9
TH		 3752 continue;
3753 if (scsi_device_get(sdev))
3754 continue;
f84e7e41 3755
41bda9c9
TH		 3756 spin_unlock_irqrestore(ap->lock, flags);
3757 scsi_rescan_device(&(sdev->sdev_gendev));
3758 scsi_device_put(sdev);
3759 spin_lock_irqsave(ap->lock, flags);
3760 }
3057ac3c 3761 }
f84e7e41
TH		 3762
3763 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 3764 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 3765}
80289167
BK		 3766
3767/**
3768 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3769 * @host: ATA host container for all SAS ports
80289167 3770 * @port_info: Information from low-level host driver
cca3974e 3771 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3772 *
3773 * LOCKING:
3774 * PCI/etc. bus probe sem.
3775 *
3776 * RETURNS:
3777 * ata_port pointer on success / NULL on failure.
3778 */
3779
cca3974e 3780struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3781 struct ata_port_info *port_info,
cca3974e 3782 struct Scsi_Host *shost)
80289167 3783{
f3187195 3784 struct ata_port *ap;
80289167 3785
f3187195 3786 ap = ata_port_alloc(host);
80289167
BK		 3787 if (!ap)
3788 return NULL;
3789
f3187195 3790 ap->port_no = 0;
a29b5dad 3791 ap->lock = &host->lock;
f3187195
TH		 3792 ap->pio_mask = port_info->pio_mask;
3793 ap->mwdma_mask = port_info->mwdma_mask;
3794 ap->udma_mask = port_info->udma_mask;
3795 ap->flags |= port_info->flags;
3796 ap->ops = port_info->port_ops;
3797 ap->cbl = ATA_CBL_SATA;
3798
80289167
BK		 3799 return ap;
3800}
3801EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3802
3803/**
3804 * ata_sas_port_start - Set port up for dma.
3805 * @ap: Port to initialize
3806 *
3807 * Called just after data structures for each port are
dde20207 3808 * initialized.
80289167
BK		 3809 *
3810 * May be used as the port_start() entry in ata_port_operations.
3811 *
3812 * LOCKING:
3813 * Inherited from caller.
3814 */
3815int ata_sas_port_start(struct ata_port *ap)
3816{
3f1e046a
NA		 3817 /*
3818 * the port is marked as frozen at allocation time, but if we don't
3819 * have new eh, we won't thaw it
3820 */
3821 if (!ap->ops->error_handler)
3822 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 3823 return 0;
80289167
BK		 3824}
3825EXPORT_SYMBOL_GPL(ata_sas_port_start);
3826
3827/**
3828 * ata_port_stop - Undo ata_sas_port_start()
3829 * @ap: Port to shut down
3830 *
80289167
BK		 3831 * May be used as the port_stop() entry in ata_port_operations.
3832 *
3833 * LOCKING:
3834 * Inherited from caller.
3835 */
3836
3837void ata_sas_port_stop(struct ata_port *ap)
3838{
80289167
BK		 3839}
3840EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3841
9508a66f
DW		 3842int ata_sas_async_port_init(struct ata_port *ap)
3843{
3844 int rc = ap->ops->port_start(ap);
3845
3846 if (!rc) {
85d6725b 3847 ap->print_id = atomic_inc_return(&ata_print_id);
9508a66f
DW		 3848 __ata_port_probe(ap);
3849 }
3850
3851 return rc;
3852}
3853EXPORT_SYMBOL_GPL(ata_sas_async_port_init);
3854
80289167
BK		 3855/**
3856 * ata_sas_port_init - Initialize a SATA device
3857 * @ap: SATA port to initialize
3858 *
3859 * LOCKING:
3860 * PCI/etc. bus probe sem.
3861 *
3862 * RETURNS:
3863 * Zero on success, non-zero on error.
3864 */
3865
3866int ata_sas_port_init(struct ata_port *ap)
3867{
3868 int rc = ap->ops->port_start(ap);
3869
f3187195 3870 if (!rc) {
85d6725b 3871 ap->print_id = atomic_inc_return(&ata_print_id);
238c9cf9 3872 rc = ata_port_probe(ap);
f3187195 3873 }
80289167
BK		 3874
3875 return rc;
3876}
3877EXPORT_SYMBOL_GPL(ata_sas_port_init);
3878
3879/**
3880 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3881 * @ap: SATA port to destroy
3882 *
3883 */
3884
3885void ata_sas_port_destroy(struct ata_port *ap)
3886{
f0d36efd
TH		 3887 if (ap->ops->port_stop)
3888 ap->ops->port_stop(ap);
80289167
BK		 3889 kfree(ap);
3890}
3891EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3892
3893/**
3894 * ata_sas_slave_configure - Default slave_config routine for libata devices
3895 * @sdev: SCSI device to configure
3896 * @ap: ATA port to which SCSI device is attached
3897 *
3898 * RETURNS:
3899 * Zero.
3900 */
3901
3902int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3903{
3904 ata_scsi_sdev_config(sdev);
9af5c9c9 3905 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3906 return 0;
3907}
3908EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3909
3910/**
3911 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3912 * @cmd: SCSI command to be sent
80289167
BK		 3913 * @ap: ATA port to which the command is being sent
3914 *
3915 * RETURNS:
08475a19
BK		 3916 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3917 * 0 otherwise.
80289167
BK		 3918 */
3919
b27dcfb0 3920int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 3921{
08475a19
BK		 3922 int rc = 0;
3923
80289167
BK		 3924 ata_scsi_dump_cdb(ap, cmd);
3925
2486fa56 3926 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 3927 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 3928 else {
3929 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 3930 cmd->scsi_done(cmd);
80289167 3931 }
08475a19 3932 return rc;
80289167
BK		 3933}
3934EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
kernel source for telekom puls (alcatel/mediatek)