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Merge branch 'for-3.11/core' of git://git.kernel.dk/linux-block
[deliverable/linux.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
8c3d3d4b 4 * Maintained by: Tejun Heo <tj@kernel.org>
af36d7f0
JG		 5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
5a0e3ad6 36#include <linux/slab.h>
1da177e4
LT		 37#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
38789fda 40#include <linux/export.h>
1da177e4 41#include <scsi/scsi.h>
1da177e4 42#include <scsi/scsi_host.h>
beb40487 43#include <scsi/scsi_cmnd.h>
85837ebd 44#include <scsi/scsi_eh.h>
005a5a06 45#include <scsi/scsi_device.h>
a6e6ce8e 46#include <scsi/scsi_tcq.h>
30afc84c 47#include <scsi/scsi_transport.h>
1da177e4 48#include <linux/libata.h>
b095518e 49#include <linux/hdreg.h>
2dcb407e 50#include <linux/uaccess.h>
2a6e58d2 51#include <linux/suspend.h>
7381fe73 52#include <linux/pm_qos.h>
18f0f978 53#include <asm/unaligned.h>
1da177e4
LT		 54
55#include "libata.h"
d9027470 56#include "libata-transport.h"
1da177e4 57
87340e98
TH		 58#define ATA_SCSI_RBUF_SIZE 4096
59
60static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
61static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 62
ad706991 63typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 64
2dcb407e 65static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 66 const struct scsi_device *scsidev);
2dcb407e 67static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 68 const struct scsi_device *scsidev);
1da177e4 69
00ac37f5
DG		 70#define RW_RECOVERY_MPAGE 0x1
71#define RW_RECOVERY_MPAGE_LEN 12
72#define CACHE_MPAGE 0x8
73#define CACHE_MPAGE_LEN 20
74#define CONTROL_MPAGE 0xa
75#define CONTROL_MPAGE_LEN 12
76#define ALL_MPAGES 0x3f
77#define ALL_SUB_MPAGES 0xff
78
79
24f75686 80static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 81 RW_RECOVERY_MPAGE,
82 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 83 (1 << 7), /* AWRE */
00ac37f5
DG		 84 0, /* read retry count */
85 0, 0, 0, 0,
86 0, /* write retry count */
87 0, 0, 0
88};
89
90static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 CACHE_MPAGE,
92 CACHE_MPAGE_LEN - 2,
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
96 0, 0, 0, 0, 0, 0, 0
97};
98
99static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE,
101 CONTROL_MPAGE_LEN - 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
106};
107
c93b263e
TH		 108static const char *ata_lpm_policy_names[] = {
109 [ATA_LPM_UNKNOWN] = "max_performance",
110 [ATA_LPM_MAX_POWER] = "max_performance",
111 [ATA_LPM_MED_POWER] = "medium_power",
112 [ATA_LPM_MIN_POWER] = "min_power",
ca77329f
KCA		 113};
114
c93b263e
TH		 115static ssize_t ata_scsi_lpm_store(struct device *dev,
116 struct device_attribute *attr,
117 const char *buf, size_t count)
ca77329f 118{
ee959b00 119 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 120 struct ata_port *ap = ata_shost_to_port(shost);
c93b263e 121 enum ata_lpm_policy policy;
6b7ae954 122 unsigned long flags;
c93b263e
TH		 123
124 /* UNKNOWN is internal state, iterate from MAX_POWER */
125 for (policy = ATA_LPM_MAX_POWER;
126 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
127 const char *name = ata_lpm_policy_names[policy];
128
129 if (strncmp(name, buf, strlen(name)) == 0)
ca77329f 130 break;
ca77329f 131 }
c93b263e 132 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 133 return -EINVAL;
134
6b7ae954
TH		 135 spin_lock_irqsave(ap->lock, flags);
136 ap->target_lpm_policy = policy;
137 ata_port_schedule_eh(ap);
138 spin_unlock_irqrestore(ap->lock, flags);
139
ca77329f
KCA		 140 return count;
141}
142
c93b263e
TH		 143static ssize_t ata_scsi_lpm_show(struct device *dev,
144 struct device_attribute *attr, char *buf)
ca77329f 145{
ee959b00 146 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f 147 struct ata_port *ap = ata_shost_to_port(shost);
ca77329f 148
6b7ae954 149 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
ca77329f
KCA		 150 return -EINVAL;
151
c93b263e 152 return snprintf(buf, PAGE_SIZE, "%s\n",
6b7ae954 153 ata_lpm_policy_names[ap->target_lpm_policy]);
ca77329f 154}
ee959b00 155DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
c93b263e 156 ata_scsi_lpm_show, ata_scsi_lpm_store);
ee959b00 157EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 158
45fabbb7
EO		 159static ssize_t ata_scsi_park_show(struct device *device,
160 struct device_attribute *attr, char *buf)
161{
162 struct scsi_device *sdev = to_scsi_device(device);
163 struct ata_port *ap;
164 struct ata_link *link;
165 struct ata_device *dev;
a464189d 166 unsigned long flags, now;
45fabbb7
EO		 167 unsigned int uninitialized_var(msecs);
168 int rc = 0;
169
170 ap = ata_shost_to_port(sdev->host);
171
172 spin_lock_irqsave(ap->lock, flags);
173 dev = ata_scsi_find_dev(ap, sdev);
174 if (!dev) {
175 rc = -ENODEV;
176 goto unlock;
177 }
178 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
179 rc = -EOPNOTSUPP;
180 goto unlock;
181 }
182
183 link = dev->link;
a464189d 184 now = jiffies;
45fabbb7
EO		 185 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
186 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 187 time_after(dev->unpark_deadline, now))
188 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 189 else
190 msecs = 0;
191
192unlock:
193 spin_unlock_irq(ap->lock);
194
195 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
196}
197
198static ssize_t ata_scsi_park_store(struct device *device,
199 struct device_attribute *attr,
200 const char *buf, size_t len)
201{
202 struct scsi_device *sdev = to_scsi_device(device);
203 struct ata_port *ap;
204 struct ata_device *dev;
205 long int input;
206 unsigned long flags;
207 int rc;
208
209 rc = strict_strtol(buf, 10, &input);
210 if (rc || input < -2)
211 return -EINVAL;
212 if (input > ATA_TMOUT_MAX_PARK) {
213 rc = -EOVERFLOW;
214 input = ATA_TMOUT_MAX_PARK;
215 }
216
217 ap = ata_shost_to_port(sdev->host);
218
219 spin_lock_irqsave(ap->lock, flags);
220 dev = ata_scsi_find_dev(ap, sdev);
221 if (unlikely(!dev)) {
222 rc = -ENODEV;
223 goto unlock;
224 }
225 if (dev->class != ATA_DEV_ATA) {
226 rc = -EOPNOTSUPP;
227 goto unlock;
228 }
229
230 if (input >= 0) {
231 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
232 rc = -EOPNOTSUPP;
233 goto unlock;
234 }
235
236 dev->unpark_deadline = ata_deadline(jiffies, input);
237 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
238 ata_port_schedule_eh(ap);
239 complete(&ap->park_req_pending);
240 } else {
241 switch (input) {
242 case -1:
243 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
244 break;
245 case -2:
246 dev->flags |= ATA_DFLAG_NO_UNLOAD;
247 break;
248 }
249 }
250unlock:
251 spin_unlock_irqrestore(ap->lock, flags);
252
253 return rc ? rc : len;
254}
255DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
256 ata_scsi_park_show, ata_scsi_park_store);
257EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
258
f0761be3
TH		 259static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
260{
261 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
262
263 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
264}
265
18f7ba4c
KCA		 266static ssize_t
267ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
268 const char *buf, size_t count)
269{
270 struct Scsi_Host *shost = class_to_shost(dev);
271 struct ata_port *ap = ata_shost_to_port(shost);
272 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
273 return ap->ops->em_store(ap, buf, count);
274 return -EINVAL;
275}
276
277static ssize_t
278ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
279 char *buf)
280{
281 struct Scsi_Host *shost = class_to_shost(dev);
282 struct ata_port *ap = ata_shost_to_port(shost);
283
284 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
285 return ap->ops->em_show(ap, buf);
286 return -EINVAL;
287}
ea7a5ed5 288DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
18f7ba4c
KCA		 289 ata_scsi_em_message_show, ata_scsi_em_message_store);
290EXPORT_SYMBOL_GPL(dev_attr_em_message);
291
292static ssize_t
293ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
294 char *buf)
295{
296 struct Scsi_Host *shost = class_to_shost(dev);
297 struct ata_port *ap = ata_shost_to_port(shost);
298
299 return snprintf(buf, 23, "%d\n", ap->em_message_type);
300}
301DEVICE_ATTR(em_message_type, S_IRUGO,
302 ata_scsi_em_message_type_show, NULL);
303EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
304
305static ssize_t
306ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
307 char *buf)
308{
309 struct scsi_device *sdev = to_scsi_device(dev);
310 struct ata_port *ap = ata_shost_to_port(sdev->host);
311 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
312
26cd4d65
XF		 313 if (atadev && ap->ops->sw_activity_show &&
314 (ap->flags & ATA_FLAG_SW_ACTIVITY))
18f7ba4c
KCA		 315 return ap->ops->sw_activity_show(atadev, buf);
316 return -EINVAL;
317}
318
319static ssize_t
320ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
321 const char *buf, size_t count)
322{
323 struct scsi_device *sdev = to_scsi_device(dev);
324 struct ata_port *ap = ata_shost_to_port(sdev->host);
325 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
326 enum sw_activity val;
327 int rc;
328
26cd4d65
XF		 329 if (atadev && ap->ops->sw_activity_store &&
330 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
18f7ba4c
KCA		 331 val = simple_strtoul(buf, NULL, 0);
332 switch (val) {
333 case OFF: case BLINK_ON: case BLINK_OFF:
334 rc = ap->ops->sw_activity_store(atadev, val);
335 if (!rc)
336 return count;
337 else
338 return rc;
339 }
340 }
341 return -EINVAL;
342}
ea7a5ed5 343DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
18f7ba4c
KCA		 344 ata_scsi_activity_store);
345EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
346
45fabbb7
EO		 347struct device_attribute *ata_common_sdev_attrs[] = {
348 &dev_attr_unload_heads,
349 NULL
350};
351EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
352
b27dcfb0 353static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
ae006510
DG		 354{
355 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
356 /* "Invalid field in cbd" */
b27dcfb0 357 cmd->scsi_done(cmd);
ae006510
DG		 358}
359
1da177e4
LT		 360/**
361 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
362 * @sdev: SCSI device for which BIOS geometry is to be determined
363 * @bdev: block device associated with @sdev
364 * @capacity: capacity of SCSI device
365 * @geom: location to which geometry will be output
366 *
367 * Generic bios head/sector/cylinder calculator
368 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
369 * mapping. Some situations may arise where the disk is not
370 * bootable if this is not used.
371 *
372 * LOCKING:
373 * Defined by the SCSI layer. We don't really care.
374 *
375 * RETURNS:
376 * Zero.
377 */
378int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
379 sector_t capacity, int geom[])
380{
381 geom[0] = 255;
382 geom[1] = 63;
383 sector_div(capacity, 255*63);
384 geom[2] = capacity;
385
386 return 0;
387}
388
d8d9129e
TH		 389/**
390 * ata_scsi_unlock_native_capacity - unlock native capacity
391 * @sdev: SCSI device to adjust device capacity for
392 *
393 * This function is called if a partition on @sdev extends beyond
394 * the end of the device. It requests EH to unlock HPA.
395 *
396 * LOCKING:
397 * Defined by the SCSI layer. Might sleep.
398 */
399void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
400{
401 struct ata_port *ap = ata_shost_to_port(sdev->host);
402 struct ata_device *dev;
403 unsigned long flags;
404
405 spin_lock_irqsave(ap->lock, flags);
406
407 dev = ata_scsi_find_dev(ap, sdev);
408 if (dev && dev->n_sectors < dev->n_native_sectors) {
409 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
410 dev->link->eh_info.action |= ATA_EH_RESET;
411 ata_port_schedule_eh(ap);
412 }
413
414 spin_unlock_irqrestore(ap->lock, flags);
415 ata_port_wait_eh(ap);
416}
417
5924b74c
TH		 418/**
419 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 420 * @ap: target port
5924b74c
TH		 421 * @sdev: SCSI device to get identify data for
422 * @arg: User buffer area for identify data
423 *
424 * LOCKING:
425 * Defined by the SCSI layer. We don't really care.
426 *
427 * RETURNS:
428 * Zero on success, negative errno on error.
429 */
94be9a58
JG		 430static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
431 void __user *arg)
5924b74c 432{
5924b74c
TH		 433 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
434 u16 __user *dst = arg;
435 char buf[40];
436
437 if (!dev)
438 return -ENOMSG;
439
440 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
441 return -EFAULT;
442
443 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
444 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
445 return -EFAULT;
446
447 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
448 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
449 return -EFAULT;
450
451 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
452 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
453 return -EFAULT;
454
455 return 0;
456}
457
b095518e
JG		 458/**
459 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 460 * @scsidev: Device to which we are issuing command
b095518e
JG		 461 * @arg: User provided data for issuing command
462 *
463 * LOCKING:
464 * Defined by the SCSI layer. We don't really care.
465 *
466 * RETURNS:
467 * Zero on success, negative errno on error.
468 */
b095518e
JG		 469int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
470{
471 int rc = 0;
472 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 473 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 474 int argsize = 0;
85837ebd 475 enum dma_data_direction data_dir;
bbe1fe7e 476 int cmd_result;
b095518e 477
c893a3ae 478 if (arg == NULL)
b095518e
JG		 479 return -EINVAL;
480
481 if (copy_from_user(args, arg, sizeof(args)))
482 return -EFAULT;
483
bbe1fe7e
ET		 484 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
485 if (!sensebuf)
486 return -ENOMEM;
487
b095518e
JG		 488 memset(scsi_cmd, 0, sizeof(scsi_cmd));
489
490 if (args[3]) {
295124dc 491 argsize = ATA_SECT_SIZE * args[3];
b095518e 492 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 493 if (argbuf == NULL) {
494 rc = -ENOMEM;
495 goto error;
496 }
b095518e
JG		 497
498 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
499 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 500 block count in sector count field */
85837ebd 501 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 502 } else {
503 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 504 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 505 data_dir = DMA_NONE;
b095518e
JG		 506 }
507
508 scsi_cmd[0] = ATA_16;
509
510 scsi_cmd[4] = args[2];
a4f19040 511 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 512 scsi_cmd[6] = args[3];
513 scsi_cmd[8] = args[1];
514 scsi_cmd[10] = 0x4f;
515 scsi_cmd[12] = 0xc2;
516 } else {
517 scsi_cmd[6] = args[1];
518 }
519 scsi_cmd[14] = args[0];
520
521 /* Good values for timeout and retries? Values below
522 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 523 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 524 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 525
526 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
527 u8 *desc = sensebuf + 8;
528 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
529
530 /* If we set cc then ATA pass-through will cause a
531 * check condition even if no error. Filter that. */
532 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
533 struct scsi_sense_hdr sshdr;
534 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e 535 &sshdr);
6d3bfc7b
KM		 536 if (sshdr.sense_key == RECOVERED_ERROR &&
537 sshdr.asc == 0 && sshdr.ascq == 0x1d)
bbe1fe7e
ET		 538 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
539 }
540
541 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 542 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
543 desc[0] == 0x09) { /* code is "ATA Descriptor" */
544 args[0] = desc[13]; /* status */
545 args[1] = desc[3]; /* error */
546 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 547 if (copy_to_user(arg, args, sizeof(args)))
548 rc = -EFAULT;
549 }
550 }
551
552
553 if (cmd_result) {
b095518e
JG		 554 rc = -EIO;
555 goto error;
556 }
557
b095518e 558 if ((argbuf)
c893a3ae 559 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 560 rc = -EFAULT;
561error:
bbe1fe7e 562 kfree(sensebuf);
8f760780 563 kfree(argbuf);
b095518e
JG		 564 return rc;
565}
566
567/**
568 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 569 * @scsidev: Device to which we are issuing command
b095518e
JG		 570 * @arg: User provided data for issuing command
571 *
572 * LOCKING:
573 * Defined by the SCSI layer. We don't really care.
574 *
575 * RETURNS:
576 * Zero on success, negative errno on error.
577 */
578int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
579{
580 int rc = 0;
581 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 582 u8 args[7], *sensebuf = NULL;
583 int cmd_result;
b095518e 584
c893a3ae 585 if (arg == NULL)
b095518e
JG		 586 return -EINVAL;
587
588 if (copy_from_user(args, arg, sizeof(args)))
589 return -EFAULT;
590
af068bd1
DM		 591 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
592 if (!sensebuf)
593 return -ENOMEM;
594
b095518e
JG		 595 memset(scsi_cmd, 0, sizeof(scsi_cmd));
596 scsi_cmd[0] = ATA_16;
597 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 598 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 599 scsi_cmd[4] = args[1];
600 scsi_cmd[6] = args[2];
601 scsi_cmd[8] = args[3];
602 scsi_cmd[10] = args[4];
603 scsi_cmd[12] = args[5];
277239f2 604 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 605 scsi_cmd[14] = args[0];
606
b095518e 607 /* Good values for timeout and retries? Values below
2e9edbf8 608 from scsi_ioctl_send_command() for default case... */
af068bd1 609 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 610 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 611
612 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
613 u8 *desc = sensebuf + 8;
614 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
615
616 /* If we set cc then ATA pass-through will cause a
617 * check condition even if no error. Filter that. */
618 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
619 struct scsi_sense_hdr sshdr;
620 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
621 &sshdr);
6d3bfc7b
KM		 622 if (sshdr.sense_key == RECOVERED_ERROR &&
623 sshdr.asc == 0 && sshdr.ascq == 0x1d)
af068bd1
DM		 624 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
625 }
626
627 /* Send userspace ATA registers */
628 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
629 desc[0] == 0x09) {/* code is "ATA Descriptor" */
630 args[0] = desc[13]; /* status */
631 args[1] = desc[3]; /* error */
632 args[2] = desc[5]; /* sector count (0:7) */
633 args[3] = desc[7]; /* lbal */
634 args[4] = desc[9]; /* lbam */
635 args[5] = desc[11]; /* lbah */
636 args[6] = desc[12]; /* select */
637 if (copy_to_user(arg, args, sizeof(args)))
638 rc = -EFAULT;
639 }
640 }
641
642 if (cmd_result) {
b095518e 643 rc = -EIO;
af068bd1
DM		 644 goto error;
645 }
b095518e 646
af068bd1
DM		 647 error:
648 kfree(sensebuf);
b095518e
JG		 649 return rc;
650}
651
e3cf95dd
AC		 652static int ata_ioc32(struct ata_port *ap)
653{
654 if (ap->flags & ATA_FLAG_PIO_DMA)
655 return 1;
656 if (ap->pflags & ATA_PFLAG_PIO32)
657 return 1;
658 return 0;
659}
660
94be9a58
JG		 661int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
662 int cmd, void __user *arg)
1da177e4 663{
1da177e4 664 int val = -EINVAL, rc = -EINVAL;
e3cf95dd 665 unsigned long flags;
1da177e4 666
1da177e4
LT		 667 switch (cmd) {
668 case ATA_IOC_GET_IO32:
e3cf95dd
AC		 669 spin_lock_irqsave(ap->lock, flags);
670 val = ata_ioc32(ap);
671 spin_unlock_irqrestore(ap->lock, flags);
1da177e4
LT		 672 if (copy_to_user(arg, &val, 1))
673 return -EFAULT;
674 return 0;
675
676 case ATA_IOC_SET_IO32:
677 val = (unsigned long) arg;
e3cf95dd
AC		 678 rc = 0;
679 spin_lock_irqsave(ap->lock, flags);
680 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
681 if (val)
682 ap->pflags |= ATA_PFLAG_PIO32;
683 else
684 ap->pflags &= ~ATA_PFLAG_PIO32;
685 } else {
686 if (val != ata_ioc32(ap))
687 rc = -EINVAL;
688 }
689 spin_unlock_irqrestore(ap->lock, flags);
690 return rc;
1da177e4 691
5924b74c 692 case HDIO_GET_IDENTITY:
94be9a58 693 return ata_get_identity(ap, scsidev, arg);
5924b74c 694
b095518e
JG		 695 case HDIO_DRIVE_CMD:
696 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
697 return -EACCES;
698 return ata_cmd_ioctl(scsidev, arg);
699
700 case HDIO_DRIVE_TASK:
701 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
702 return -EACCES;
703 return ata_task_ioctl(scsidev, arg);
704
1da177e4
LT		 705 default:
706 rc = -ENOTTY;
707 break;
708 }
709
1da177e4
LT		 710 return rc;
711}
94be9a58
JG		 712EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
713
714int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
715{
716 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
717 scsidev, cmd, arg);
718}
719EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 720
721/**
722 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 723 * @dev: ATA device to which the new command is attached
724 * @cmd: SCSI command that originated this ATA command
1da177e4
LT		 725 *
726 * Obtain a reference to an unused ata_queued_cmd structure,
727 * which is the basic libata structure representing a single
728 * ATA command sent to the hardware.
729 *
730 * If a command was available, fill in the SCSI-specific
731 * portions of the structure with information on the
732 * current command.
733 *
734 * LOCKING:
cca3974e 735 * spin_lock_irqsave(host lock)
1da177e4
LT		 736 *
737 * RETURNS:
738 * Command allocated, or %NULL if none available.
739 */
7102d230 740static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
b27dcfb0 741 struct scsi_cmnd *cmd)
1da177e4
LT		 742{
743 struct ata_queued_cmd *qc;
744
8a8bc223 745 qc = ata_qc_new_init(dev);
1da177e4
LT		 746 if (qc) {
747 qc->scsicmd = cmd;
b27dcfb0 748 qc->scsidone = cmd->scsi_done;
1da177e4 749
ff2aeb1e 750 qc->sg = scsi_sglist(cmd);
7120165c 751 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 752 } else {
753 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
b27dcfb0 754 cmd->scsi_done(cmd);
1da177e4
LT		 755 }
756
757 return qc;
758}
759
aacda375
TH		 760static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
761{
762 struct scsi_cmnd *scmd = qc->scsicmd;
763
764 qc->extrabytes = scmd->request->extra_len;
765 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
766}
767
b095518e
JG		 768/**
769 * ata_dump_status - user friendly display of error info
770 * @id: id of the port in question
771 * @tf: ptr to filled out taskfile
772 *
773 * Decode and dump the ATA error/status registers for the user so
774 * that they have some idea what really happened at the non
775 * make-believe layer.
776 *
777 * LOCKING:
778 * inherited from caller
779 */
7102d230 780static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 781{
782 u8 stat = tf->command, err = tf->feature;
783
784 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
785 if (stat & ATA_BUSY) {
786 printk("Busy }\n"); /* Data is not valid in this case */
787 } else {
788 if (stat & 0x40) printk("DriveReady ");
789 if (stat & 0x20) printk("DeviceFault ");
790 if (stat & 0x10) printk("SeekComplete ");
791 if (stat & 0x08) printk("DataRequest ");
792 if (stat & 0x04) printk("CorrectedError ");
793 if (stat & 0x02) printk("Index ");
794 if (stat & 0x01) printk("Error ");
795 printk("}\n");
796
797 if (err) {
798 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
799 if (err & 0x04) printk("DriveStatusError ");
800 if (err & 0x80) {
801 if (err & 0x04) printk("BadCRC ");
802 else printk("Sector ");
803 }
804 if (err & 0x40) printk("UncorrectableError ");
805 if (err & 0x10) printk("SectorIdNotFound ");
806 if (err & 0x02) printk("TrackZeroNotFound ");
807 if (err & 0x01) printk("AddrMarkNotFound ");
808 printk("}\n");
809 }
810 }
811}
812
1da177e4
LT		 813/**
814 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 815 * @id: ATA device number
1da177e4 816 * @drv_stat: value contained in ATA status register
b095518e
JG		 817 * @drv_err: value contained in ATA error register
818 * @sk: the sense key we'll fill out
819 * @asc: the additional sense code we'll fill out
820 * @ascq: the additional sense code qualifier we'll fill out
246619da 821 * @verbose: be verbose
1da177e4 822 *
b095518e
JG		 823 * Converts an ATA error into a SCSI error. Fill out pointers to
824 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
825 * format sense blocks.
1da177e4
LT		 826 *
827 * LOCKING:
cca3974e 828 * spin_lock_irqsave(host lock)
1da177e4 829 */
7102d230
AB		 830static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
831 u8 *asc, u8 *ascq, int verbose)
1da177e4 832{
b095518e 833 int i;
ffe75ef6 834
1da177e4 835 /* Based on the 3ware driver translation table */
98ac62de 836 static const unsigned char sense_table[][4] = {
1da177e4
LT		 837 /* BBD|ECC|ID|MAR */
838 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
839 /* BBD|ECC|ID */
840 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
841 /* ECC|MC|MARK */
842 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
843 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
844 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
845 /* MC|ID|ABRT|TRK0|MARK */
846 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
847 /* MCR|MARK */
848 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
849 /* Bad address mark */
850 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
851 /* TRK0 */
78062c50
GG		 852 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
853 /* Abort: 0x04 is not translated here, see below */
1da177e4
LT		 854 /* Media change request */
855 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
78062c50
GG		 856 /* SRV/IDNF */
857 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, // ID not found Logical address out of range
858 /* MC */
859 {0x20, UNIT_ATTENTION, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
1da177e4
LT		 860 /* ECC */
861 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
862 /* BBD - block marked bad */
78062c50 863 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
1da177e4
LT		 864 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
865 };
98ac62de 866 static const unsigned char stat_table[][4] = {
1da177e4
LT		 867 /* Must be first because BUSY means no other bits valid */
868 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
78062c50 869 {0x20, HARDWARE_ERROR, 0x44, 0x00}, // Device fault, internal target failure
1da177e4
LT		 870 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
871 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
872 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
873 };
1da177e4 874
1da177e4
LT		 875 /*
876 * Is this an error we can process/parse
877 */
b095518e
JG		 878 if (drv_stat & ATA_BUSY) {
879 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 880 }
b095518e
JG		 881
882 if (drv_err) {
883 /* Look for drv_err */
884 for (i = 0; sense_table[i][0] != 0xFF; i++) {
885 /* Look for best matches first */
2e9edbf8 886 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 887 sense_table[i][0]) {
888 *sk = sense_table[i][1];
889 *asc = sense_table[i][2];
890 *ascq = sense_table[i][3];
891 goto translate_done;
892 }
893 }
1da177e4 894 }
b095518e 895
78062c50
GG		 896 /*
897 * Fall back to interpreting status bits. Note that if the drv_err
898 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
899 * is not descriptive enough.
900 */
b095518e
JG		 901 for (i = 0; stat_table[i][0] != 0xFF; i++) {
902 if (stat_table[i][0] & drv_stat) {
903 *sk = stat_table[i][1];
904 *asc = stat_table[i][2];
905 *ascq = stat_table[i][3];
906 goto translate_done;
1da177e4 907 }
b095518e 908 }
b095518e 909
78062c50
GG		 910 /*
911 * We need a sensible error return here, which is tricky, and one
912 * that won't cause people to do things like return a disk wrongly.
913 */
2d202024
AC		 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
84a9a8cd
GG		 934 * block. If there was no error, we get the request from an ATA
935 * passthrough command, so we use the following sense data:
936 * sk = RECOVERED ERROR
937 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
938 *
b095518e
JG		 939 *
940 * LOCKING:
750426aa 941 * None.
b095518e 942 */
750426aa 943static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 944{
945 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 946 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 947 unsigned char *sb = cmd->sense_buffer;
948 unsigned char *desc = sb + 8;
246619da 949 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 950
951 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
952
0e5dec47 953 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 954
b095518e
JG		 955 /*
956 * Use ata_to_sense_error() to map status register bits
957 * onto sense key, asc & ascq.
958 */
058e55e1
TH		 959 if (qc->err_mask ||
960 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 961 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 962 &sb[1], &sb[2], &sb[3], verbose);
b095518e 963 sb[1] &= 0x0f;
84a9a8cd
GG		 964 } else {
965 sb[1] = RECOVERED_ERROR;
966 sb[2] = 0;
967 sb[3] = 0x1D;
1da177e4
LT		 968 }
969
b095518e
JG		 970 /*
971 * Sense data is current and format is descriptor.
972 */
973 sb[0] = 0x72;
1da177e4 974
b095518e
JG		 975 desc[0] = 0x09;
976
f38621b3
TH		 977 /* set length of additional sense data */
978 sb[7] = 14;
979 desc[1] = 12;
b095518e
JG		 980
981 /*
982 * Copy registers into sense buffer.
983 */
984 desc[2] = 0x00;
985 desc[3] = tf->feature; /* == error reg */
986 desc[5] = tf->nsect;
987 desc[7] = tf->lbal;
988 desc[9] = tf->lbam;
989 desc[11] = tf->lbah;
990 desc[12] = tf->device;
991 desc[13] = tf->command; /* == status reg */
992
993 /*
994 * Fill in Extend bit, and the high order bytes
995 * if applicable.
996 */
997 if (tf->flags & ATA_TFLAG_LBA48) {
998 desc[2] |= 0x01;
999 desc[4] = tf->hob_nsect;
1000 desc[6] = tf->hob_lbal;
1001 desc[8] = tf->hob_lbam;
1002 desc[10] = tf->hob_lbah;
1da177e4 1003 }
b095518e 1004}
1da177e4 1005
b095518e 1006/**
750426aa 1007 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1008 * @qc: Command that we are erroring out
1009 *
d25614ba 1010 * Generate sense block for a failed ATA command @qc. Descriptor
25985edc 1011 * format is used to accommodate LBA48 block address.
b095518e
JG		 1012 *
1013 * LOCKING:
750426aa 1014 * None.
b095518e 1015 */
750426aa 1016static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1017{
d25614ba 1018 struct ata_device *dev = qc->dev;
b095518e 1019 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1020 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1021 unsigned char *sb = cmd->sense_buffer;
d25614ba 1022 unsigned char *desc = sb + 8;
246619da 1023 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1024 u64 block;
b095518e
JG		 1025
1026 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1027
0e5dec47 1028 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1029
d25614ba
TH		 1030 /* sense data is current and format is descriptor */
1031 sb[0] = 0x72;
1032
1033 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1034 * onto sense key, asc & ascq.
1035 */
058e55e1
TH		 1036 if (qc->err_mask ||
1037 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1038 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1039 &sb[1], &sb[2], &sb[3], verbose);
1040 sb[1] &= 0x0f;
1da177e4 1041 }
1da177e4 1042
d25614ba 1043 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1044
d25614ba
TH		 1045 /* information sense data descriptor */
1046 sb[7] = 12;
1047 desc[0] = 0x00;
1048 desc[1] = 10;
a7dac447 1049
d25614ba
TH		 1050 desc[2] |= 0x80; /* valid */
1051 desc[6] = block >> 40;
1052 desc[7] = block >> 32;
1053 desc[8] = block >> 24;
1054 desc[9] = block >> 16;
1055 desc[10] = block >> 8;
1056 desc[11] = block;
1da177e4
LT		 1057}
1058
a6cce2a7
BK		 1059static void ata_scsi_sdev_config(struct scsi_device *sdev)
1060{
1061 sdev->use_10_for_rw = 1;
1062 sdev->use_10_for_ms = 1;
3c6bdaea 1063 sdev->no_report_opcodes = 1;
5db44863 1064 sdev->no_write_same = 1;
31cc23b3
TH		 1065
1066 /* Schedule policy is determined by ->qc_defer() callback and
1067 * it needs to see every deferred qc. Set dev_blocked to 1 to
1068 * prevent SCSI midlayer from automatically deferring
1069 * requests.
1070 */
1071 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1072}
1073
fa2fc7f4
JB		 1074/**
1075 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1076 * @rq: request to be checked
fa2fc7f4
JB		 1077 *
1078 * ATAPI commands which transfer variable length data to host
1079 * might overflow due to application error or hardare bug. This
1080 * function checks whether overflow should be drained and ignored
1081 * for @request.
1082 *
1083 * LOCKING:
1084 * None.
1085 *
1086 * RETURNS:
1087 * 1 if ; otherwise, 0.
1088 */
1089static int atapi_drain_needed(struct request *rq)
1090{
33659ebb 1091 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
fa2fc7f4
JB		 1092 return 0;
1093
7b6d91da 1094 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
fa2fc7f4
JB		 1095 return 0;
1096
1097 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1098}
1099
1100static int ata_scsi_dev_config(struct scsi_device *sdev,
1101 struct ata_device *dev)
a6cce2a7 1102{
900e599e 1103 struct request_queue *q = sdev->request_queue;
1104
45fabbb7
EO		 1105 if (!ata_id_has_unload(dev->id))
1106 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1107
914ed354 1108 /* configure max sectors */
900e599e 1109 blk_queue_max_hw_sectors(q, dev->max_sectors);
a6cce2a7 1110
fa2fc7f4 1111 if (dev->class == ATA_DEV_ATAPI) {
fa2fc7f4
JB		 1112 void *buf;
1113
729a6a30
TH		 1114 sdev->sector_size = ATA_SECT_SIZE;
1115
1116 /* set DMA padding */
900e599e 1117 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1118
1119 /* configure draining */
1120 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1121 if (!buf) {
a9a79dfe 1122 ata_dev_err(dev, "drain buffer allocation failed\n");
fa2fc7f4
JB		 1123 return -ENOMEM;
1124 }
1125
1126 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1127 } else {
295124dc 1128 sdev->sector_size = ata_id_logical_sector_size(dev->id);
d8cf5389 1129 sdev->manage_start_stop = 1;
dde20207 1130 }
d8cf5389 1131
729a6a30
TH		 1132 /*
1133 * ata_pio_sectors() expects buffer for each sector to not cross
1134 * page boundary. Enforce it by requiring buffers to be sector
1135 * aligned, which works iff sector_size is not larger than
1136 * PAGE_SIZE. ATAPI devices also need the alignment as
1137 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1138 */
1139 if (sdev->sector_size > PAGE_SIZE)
a9a79dfe 1140 ata_dev_warn(dev,
729a6a30
TH		 1141 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1142 sdev->sector_size);
1143
900e599e 1144 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
729a6a30 1145
f26792d5
JG		 1146 if (dev->flags & ATA_DFLAG_AN)
1147 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1148
a6e6ce8e
TH		 1149 if (dev->flags & ATA_DFLAG_NCQ) {
1150 int depth;
1151
1152 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1153 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1154 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1155 }
fa2fc7f4 1156
900e599e 1157 blk_queue_flush_queueable(q, false);
1158
295124dc 1159 dev->sdev = sdev;
fa2fc7f4 1160 return 0;
a6cce2a7
BK		 1161}
1162
1da177e4
LT		 1163/**
1164 * ata_scsi_slave_config - Set SCSI device attributes
1165 * @sdev: SCSI device to examine
1166 *
1167 * This is called before we actually start reading
1168 * and writing to the device, to configure certain
1169 * SCSI mid-layer behaviors.
1170 *
1171 * LOCKING:
1172 * Defined by SCSI layer. We don't really care.
1173 */
1174
1175int ata_scsi_slave_config(struct scsi_device *sdev)
1176{
31534363
TH		 1177 struct ata_port *ap = ata_shost_to_port(sdev->host);
1178 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1179 int rc = 0;
31534363 1180
a6cce2a7 1181 ata_scsi_sdev_config(sdev);
1da177e4 1182
31534363 1183 if (dev)
fa2fc7f4 1184 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1185
fa2fc7f4 1186 return rc;
1da177e4
LT		 1187}
1188
83c47bcb
TH		 1189/**
1190 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1191 * @sdev: SCSI device to be destroyed
1192 *
1193 * @sdev is about to be destroyed for hot/warm unplugging. If
1194 * this unplugging was initiated by libata as indicated by NULL
1195 * dev->sdev, this function doesn't have to do anything.
1196 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1197 * Clear dev->sdev, schedule the device for ATA detach and invoke
1198 * EH.
1199 *
1200 * LOCKING:
1201 * Defined by SCSI layer. We don't really care.
1202 */
1203void ata_scsi_slave_destroy(struct scsi_device *sdev)
1204{
1205 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1206 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1207 unsigned long flags;
1208 struct ata_device *dev;
1209
1210 if (!ap->ops->error_handler)
1211 return;
1212
ba6a1308 1213 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1214 dev = __ata_scsi_find_dev(ap, sdev);
1215 if (dev && dev->sdev) {
1216 /* SCSI device already in CANCEL state, no need to offline it */
1217 dev->sdev = NULL;
1218 dev->flags |= ATA_DFLAG_DETACH;
1219 ata_port_schedule_eh(ap);
1220 }
ba6a1308 1221 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1222
1223 kfree(q->dma_drain_buffer);
1224 q->dma_drain_buffer = NULL;
1225 q->dma_drain_size = 0;
83c47bcb
TH		 1226}
1227
a6e6ce8e 1228/**
f6e67035 1229 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
6d2dd054
MPS		 1230 * @ap: ATA port to which the device change the queue depth
1231 * @sdev: SCSI device to configure queue depth for
1232 * @queue_depth: new queue depth
1233 * @reason: calling context
a6e6ce8e 1234 *
f6e67035
DW		 1235 * libsas and libata have different approaches for associating a sdev to
1236 * its ata_port.
a6e6ce8e 1237 *
a6e6ce8e 1238 */
f6e67035
DW		 1239int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1240 int queue_depth, int reason)
a6e6ce8e 1241{
a6e6ce8e 1242 struct ata_device *dev;
360f654e 1243 unsigned long flags;
a6e6ce8e 1244
e881a172
MC		 1245 if (reason != SCSI_QDEPTH_DEFAULT)
1246 return -EOPNOTSUPP;
1247
c3c70c44 1248 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1249 return sdev->queue_depth;
1250
1251 dev = ata_scsi_find_dev(ap, sdev);
1252 if (!dev || !ata_dev_enabled(dev))
1253 return sdev->queue_depth;
1254
c3c70c44 1255 /* NCQ enabled? */
360f654e 1256 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1257 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1258 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1259 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1260 queue_depth = 1;
1261 }
360f654e
TH		 1262 spin_unlock_irqrestore(ap->lock, flags);
1263
c3c70c44
TH		 1264 /* limit and apply queue depth */
1265 queue_depth = min(queue_depth, sdev->host->can_queue);
1266 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1267 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1268
1269 if (sdev->queue_depth == queue_depth)
1270 return -EINVAL;
1271
1272 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1273 return queue_depth;
1274}
1275
f6e67035
DW		 1276/**
1277 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1278 * @sdev: SCSI device to configure queue depth for
1279 * @queue_depth: new queue depth
1280 * @reason: calling context
1281 *
1282 * This is libata standard hostt->change_queue_depth callback.
1283 * SCSI will call into this callback when user tries to set queue
1284 * depth via sysfs.
1285 *
1286 * LOCKING:
1287 * SCSI layer (we don't care)
1288 *
1289 * RETURNS:
1290 * Newly configured queue depth.
1291 */
1292int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1293 int reason)
1294{
1295 struct ata_port *ap = ata_shost_to_port(sdev->host);
1296
1297 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1298}
1299
972dcafb
DG		 1300/**
1301 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1302 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1303 *
1304 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1305 * (to start). Perhaps these commands should be preceded by
1306 * CHECK POWER MODE to see what power mode the device is already in.
1307 * [See SAT revision 5 at www.t10.org]
1308 *
1309 * LOCKING:
cca3974e 1310 * spin_lock_irqsave(host lock)
972dcafb
DG		 1311 *
1312 * RETURNS:
1313 * Zero on success, non-zero on error.
1314 */
ad706991 1315static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1316{
542b1444 1317 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1318 struct ata_taskfile *tf = &qc->tf;
ad706991 1319 const u8 *cdb = scmd->cmnd;
972dcafb 1320
2e5704f6
TH		 1321 if (scmd->cmd_len < 5)
1322 goto invalid_fld;
1323
972dcafb
DG		 1324 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1325 tf->protocol = ATA_PROT_NODATA;
542b1444 1326 if (cdb[1] & 0x1) {
972dcafb
DG		 1327 ; /* ignore IMMED bit, violates sat-r05 */
1328 }
542b1444 1329 if (cdb[4] & 0x2)
ae006510 1330 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1331 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1332 goto invalid_fld; /* power conditions not supported */
e31e8531 1333
542b1444 1334 if (cdb[4] & 0x1) {
972dcafb 1335 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1336
1337 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1338 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1339
1340 tf->lbah = 0x0;
1341 tf->lbam = 0x0;
1342 tf->lbal = 0x0;
1343 tf->device |= ATA_LBA;
1344 } else {
1345 /* CHS */
1346 tf->lbal = 0x1; /* sect */
1347 tf->lbam = 0x0; /* cyl low */
1348 tf->lbah = 0x0; /* cyl high */
1349 }
1350
972dcafb 1351 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1352 } else {
2a6e58d2
RW		 1353 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1354 * or S5) causing some drives to spin up and down again.
1355 */
1356 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1357 system_state == SYSTEM_POWER_OFF)
1358 goto skip;
1359
1360 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1361 system_entering_hibernation())
1362 goto skip;
1363
78981a7c
RH		 1364 /* Issue ATA STANDBY IMMEDIATE command */
1365 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1366 }
78981a7c 1367
972dcafb
DG		 1368 /*
1369 * Standby and Idle condition timers could be implemented but that
1370 * would require libata to implement the Power condition mode page
1371 * and allow the user to change it. Changing mode pages requires
1372 * MODE SELECT to be implemented.
1373 */
1374
1375 return 0;
ae006510 1376
2a6e58d2 1377 invalid_fld:
542b1444 1378 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1379 /* "Invalid field in cbd" */
1380 return 1;
2a6e58d2
RW		 1381 skip:
1382 scmd->result = SAM_STAT_GOOD;
1383 return 1;
972dcafb
DG		 1384}
1385
1386
1da177e4
LT		 1387/**
1388 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1389 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1390 *
1391 * Sets up an ATA taskfile to issue FLUSH CACHE or
1392 * FLUSH CACHE EXT.
1393 *
1394 * LOCKING:
cca3974e 1395 * spin_lock_irqsave(host lock)
1da177e4
LT		 1396 *
1397 * RETURNS:
1398 * Zero on success, non-zero on error.
1399 */
ad706991 1400static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1401{
1402 struct ata_taskfile *tf = &qc->tf;
1403
1404 tf->flags |= ATA_TFLAG_DEVICE;
1405 tf->protocol = ATA_PROT_NODATA;
1406
6fc49adb 1407 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1408 tf->command = ATA_CMD_FLUSH_EXT;
1409 else
1410 tf->command = ATA_CMD_FLUSH;
1411
b666da35
TH		 1412 /* flush is critical for IO integrity, consider it an IO command */
1413 qc->flags |= ATA_QCFLAG_IO;
1414
1da177e4
LT		 1415 return 0;
1416}
1417
3aef5231
AL		 1418/**
1419 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1420 * @cdb: SCSI command to translate
3aef5231
AL		 1421 *
1422 * Calculate LBA and transfer length for 6-byte commands.
1423 *
1424 * RETURNS:
1425 * @plba: the LBA
1426 * @plen: the transfer length
1427 */
542b1444 1428static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1429{
1430 u64 lba = 0;
6c7b7d2b 1431 u32 len;
3aef5231
AL		 1432
1433 VPRINTK("six-byte command\n");
1434
6c7b7d2b 1435 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1436 lba |= ((u64)cdb[2]) << 8;
1437 lba |= ((u64)cdb[3]);
3aef5231 1438
6c7b7d2b 1439 len = cdb[4];
3aef5231
AL		 1440
1441 *plba = lba;
1442 *plen = len;
1443}
1444
1445/**
1446 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1447 * @cdb: SCSI command to translate
3aef5231
AL		 1448 *
1449 * Calculate LBA and transfer length for 10-byte commands.
1450 *
1451 * RETURNS:
1452 * @plba: the LBA
1453 * @plen: the transfer length
1454 */
542b1444 1455static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1456{
1457 u64 lba = 0;
1458 u32 len = 0;
1459
1460 VPRINTK("ten-byte command\n");
1461
542b1444
TH		 1462 lba |= ((u64)cdb[2]) << 24;
1463 lba |= ((u64)cdb[3]) << 16;
1464 lba |= ((u64)cdb[4]) << 8;
1465 lba |= ((u64)cdb[5]);
3aef5231 1466
542b1444
TH		 1467 len |= ((u32)cdb[7]) << 8;
1468 len |= ((u32)cdb[8]);
3aef5231
AL		 1469
1470 *plba = lba;
1471 *plen = len;
1472}
1473
1474/**
1475 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1476 * @cdb: SCSI command to translate
3aef5231
AL		 1477 *
1478 * Calculate LBA and transfer length for 16-byte commands.
1479 *
1480 * RETURNS:
1481 * @plba: the LBA
1482 * @plen: the transfer length
1483 */
542b1444 1484static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1485{
1486 u64 lba = 0;
1487 u32 len = 0;
1488
1489 VPRINTK("sixteen-byte command\n");
1490
542b1444
TH		 1491 lba |= ((u64)cdb[2]) << 56;
1492 lba |= ((u64)cdb[3]) << 48;
1493 lba |= ((u64)cdb[4]) << 40;
1494 lba |= ((u64)cdb[5]) << 32;
1495 lba |= ((u64)cdb[6]) << 24;
1496 lba |= ((u64)cdb[7]) << 16;
1497 lba |= ((u64)cdb[8]) << 8;
1498 lba |= ((u64)cdb[9]);
3aef5231 1499
542b1444
TH		 1500 len |= ((u32)cdb[10]) << 24;
1501 len |= ((u32)cdb[11]) << 16;
1502 len |= ((u32)cdb[12]) << 8;
1503 len |= ((u32)cdb[13]);
3aef5231
AL		 1504
1505 *plba = lba;
1506 *plen = len;
1507}
1508
1da177e4
LT		 1509/**
1510 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1511 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1512 *
1513 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1514 *
1515 * LOCKING:
cca3974e 1516 * spin_lock_irqsave(host lock)
1da177e4
LT		 1517 *
1518 * RETURNS:
1519 * Zero on success, non-zero on error.
1520 */
ad706991 1521static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1522{
542b1444 1523 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1524 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1525 struct ata_device *dev = qc->dev;
1da177e4 1526 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1527 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1528 u64 block;
1529 u32 n_block;
1da177e4
LT		 1530
1531 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1532 tf->protocol = ATA_PROT_NODATA;
1da177e4 1533
2e5704f6
TH		 1534 if (cdb[0] == VERIFY) {
1535 if (scmd->cmd_len < 10)
1536 goto invalid_fld;
542b1444 1537 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1538 } else if (cdb[0] == VERIFY_16) {
1539 if (scmd->cmd_len < 16)
1540 goto invalid_fld;
542b1444 1541 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1542 } else
ae006510 1543 goto invalid_fld;
1da177e4 1544
8bf62ece 1545 if (!n_block)
ae006510 1546 goto nothing_to_do;
8bf62ece 1547 if (block >= dev_sectors)
ae006510 1548 goto out_of_range;
8bf62ece 1549 if ((block + n_block) > dev_sectors)
ae006510 1550 goto out_of_range;
1da177e4 1551
07506697
AL		 1552 if (dev->flags & ATA_DFLAG_LBA) {
1553 tf->flags |= ATA_TFLAG_LBA;
1554
c6a33e24
AL		 1555 if (lba_28_ok(block, n_block)) {
1556 /* use LBA28 */
1557 tf->command = ATA_CMD_VERIFY;
1558 tf->device |= (block >> 24) & 0xf;
1559 } else if (lba_48_ok(block, n_block)) {
1560 if (!(dev->flags & ATA_DFLAG_LBA48))
1561 goto out_of_range;
07506697
AL		 1562
1563 /* use LBA48 */
1564 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1565 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1566
8bf62ece 1567 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1568
8bf62ece
AL		 1569 tf->hob_lbah = (block >> 40) & 0xff;
1570 tf->hob_lbam = (block >> 32) & 0xff;
1571 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1572 } else
1573 /* request too large even for LBA48 */
1574 goto out_of_range;
8bf62ece
AL		 1575
1576 tf->nsect = n_block & 0xff;
1da177e4 1577
8bf62ece
AL		 1578 tf->lbah = (block >> 16) & 0xff;
1579 tf->lbam = (block >> 8) & 0xff;
1580 tf->lbal = block & 0xff;
1da177e4 1581
8bf62ece
AL		 1582 tf->device |= ATA_LBA;
1583 } else {
1584 /* CHS */
1585 u32 sect, head, cyl, track;
1586
c6a33e24
AL		 1587 if (!lba_28_ok(block, n_block))
1588 goto out_of_range;
07506697 1589
8bf62ece
AL		 1590 /* Convert LBA to CHS */
1591 track = (u32)block / dev->sectors;
1592 cyl = track / dev->heads;
1593 head = track % dev->heads;
1594 sect = (u32)block % dev->sectors + 1;
1595
c187c4b5
AL		 1596 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1597 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1598
1599 /* Check whether the converted CHS can fit.
1600 Cylinder: 0-65535
8bf62ece
AL		 1601 Head: 0-15
1602 Sector: 1-255*/
2e9edbf8 1603 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1604 goto out_of_range;
2e9edbf8 1605
8bf62ece
AL		 1606 tf->command = ATA_CMD_VERIFY;
1607 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1608 tf->lbal = sect;
1609 tf->lbam = cyl;
1610 tf->lbah = cyl >> 8;
1611 tf->device |= head;
1612 }
1da177e4
LT		 1613
1614 return 0;
ae006510
DG		 1615
1616invalid_fld:
542b1444 1617 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1618 /* "Invalid field in cbd" */
1619 return 1;
1620
1621out_of_range:
542b1444 1622 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1623 /* "Logical Block Address out of range" */
1624 return 1;
1625
1626nothing_to_do:
542b1444 1627 scmd->result = SAM_STAT_GOOD;
ae006510 1628 return 1;
1da177e4
LT		 1629}
1630
1631/**
1632 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1633 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1634 *
1635 * Converts any of six SCSI read/write commands into the
1636 * ATA counterpart, including starting sector (LBA),
1637 * sector count, and taking into account the device's LBA48
1638 * support.
1639 *
1640 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1641 * %WRITE_16 are currently supported.
1642 *
1643 * LOCKING:
cca3974e 1644 * spin_lock_irqsave(host lock)
1da177e4
LT		 1645 *
1646 * RETURNS:
1647 * Zero on success, non-zero on error.
1648 */
ad706991 1649static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1650{
542b1444 1651 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1652 const u8 *cdb = scmd->cmnd;
bd056d7e 1653 unsigned int tf_flags = 0;
3aef5231
AL		 1654 u64 block;
1655 u32 n_block;
bd056d7e 1656 int rc;
1da177e4 1657
542b1444 1658 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1659 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1660
9a3dccc4 1661 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1662 switch (cdb[0]) {
3aef5231
AL		 1663 case READ_10:
1664 case WRITE_10:
2e5704f6
TH		 1665 if (unlikely(scmd->cmd_len < 10))
1666 goto invalid_fld;
542b1444 1667 scsi_10_lba_len(cdb, &block, &n_block);
3e451a49 1668 if (cdb[1] & (1 << 3))
bd056d7e 1669 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1670 break;
1671 case READ_6:
1672 case WRITE_6:
2e5704f6
TH		 1673 if (unlikely(scmd->cmd_len < 6))
1674 goto invalid_fld;
542b1444 1675 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1676
1677 /* for 6-byte r/w commands, transfer length 0
1678 * means 256 blocks of data, not 0 block.
1679 */
76b2bf9b
JG		 1680 if (!n_block)
1681 n_block = 256;
3aef5231
AL		 1682 break;
1683 case READ_16:
1684 case WRITE_16:
2e5704f6
TH		 1685 if (unlikely(scmd->cmd_len < 16))
1686 goto invalid_fld;
542b1444 1687 scsi_16_lba_len(cdb, &block, &n_block);
3e451a49 1688 if (cdb[1] & (1 << 3))
bd056d7e 1689 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1690 break;
1691 default:
8bf62ece 1692 DPRINTK("no-byte command\n");
ae006510 1693 goto invalid_fld;
1da177e4
LT		 1694 }
1695
8bf62ece
AL		 1696 /* Check and compose ATA command */
1697 if (!n_block)
c187c4b5
AL		 1698 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1699 * length 0 means transfer 0 block of data.
1700 * However, for ATA R/W commands, sector count 0 means
1701 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1702 *
1703 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1704 */
ae006510 1705 goto nothing_to_do;
1da177e4 1706
bd056d7e 1707 qc->flags |= ATA_QCFLAG_IO;
295124dc 1708 qc->nbytes = n_block * scmd->device->sector_size;
1da177e4 1709
bd056d7e
TH		 1710 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1711 qc->tag);
1712 if (likely(rc == 0))
1713 return 0;
ae006510 1714
bd056d7e
TH		 1715 if (rc == -ERANGE)
1716 goto out_of_range;
1717 /* treat all other errors as -EINVAL, fall through */
ae006510 1718invalid_fld:
542b1444 1719 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1720 /* "Invalid field in cbd" */
1721 return 1;
1722
1723out_of_range:
542b1444 1724 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1725 /* "Logical Block Address out of range" */
1726 return 1;
1727
1728nothing_to_do:
542b1444 1729 scmd->result = SAM_STAT_GOOD;
ae006510 1730 return 1;
1da177e4
LT		 1731}
1732
77853bf2 1733static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1734{
c31f571d 1735 struct ata_port *ap = qc->ap;
1da177e4 1736 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1737 u8 *cdb = cmd->cmnd;
2dcb407e 1738 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1739
1740 /* For ATA pass thru (SAT) commands, generate a sense block if
1741 * user mandated it or if there's an error. Note that if we
84a9a8cd
GG		 1742 * generate because the user forced us to [CK_COND =1], a check
1743 * condition is generated and the ATA register values are returned
b095518e 1744 * whether the command completed successfully or not. If there
84a9a8cd
GG		 1745 * was no error, we use the following sense data:
1746 * sk = RECOVERED ERROR
1747 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
b095518e 1748 */
a7dac447 1749 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1750 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1751 ata_gen_passthru_sense(qc);
b095518e
JG		 1752 } else {
1753 if (!need_sense) {
1754 cmd->result = SAM_STAT_GOOD;
1755 } else {
1756 /* TODO: decide which descriptor format to use
1757 * for 48b LBA devices and call that here
1758 * instead of the fixed desc, which is only
1759 * good for smaller LBA (and maybe CHS?)
1760 * devices.
1761 */
750426aa 1762 ata_gen_ata_sense(qc);
b095518e
JG		 1763 }
1764 }
1da177e4 1765
c31f571d 1766 if (need_sense && !ap->ops->error_handler)
44877b4e 1767 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1768
1769 qc->scsidone(cmd);
1770
77853bf2 1771 ata_qc_free(qc);
1da177e4
LT		 1772}
1773
1774/**
1775 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1776 * @dev: ATA device to which the command is addressed
1777 * @cmd: SCSI command to execute
1da177e4
LT		 1778 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1779 *
1780 * Our ->queuecommand() function has decided that the SCSI
1781 * command issued can be directly translated into an ATA
1782 * command, rather than handled internally.
1783 *
1784 * This function sets up an ata_queued_cmd structure for the
1785 * SCSI command, and sends that ata_queued_cmd to the hardware.
1786 *
ae006510
DG		 1787 * The xlat_func argument (actor) returns 0 if ready to execute
1788 * ATA command, else 1 to finish translation. If 1 is returned
1789 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1790 * to be set reflecting an error condition or clean (early)
1791 * termination.
1792 *
1da177e4 1793 * LOCKING:
cca3974e 1794 * spin_lock_irqsave(host lock)
2115ea94
TH		 1795 *
1796 * RETURNS:
1797 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1798 * needs to be deferred.
1da177e4 1799 */
2115ea94 1800static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2115ea94 1801 ata_xlat_func_t xlat_func)
1da177e4 1802{
31cc23b3 1803 struct ata_port *ap = dev->link->ap;
1da177e4 1804 struct ata_queued_cmd *qc;
31cc23b3 1805 int rc;
1da177e4
LT		 1806
1807 VPRINTK("ENTER\n");
1808
b27dcfb0 1809 qc = ata_scsi_qc_new(dev, cmd);
1da177e4 1810 if (!qc)
ae006510 1811 goto err_mem;
1da177e4
LT		 1812
1813 /* data is present; dma-map it */
be7db055 1814 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1815 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1816 if (unlikely(scsi_bufflen(cmd) < 1)) {
a9a79dfe 1817 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
ae006510 1818 goto err_did;
1da177e4
LT		 1819 }
1820
7120165c 1821 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1822
1823 qc->dma_dir = cmd->sc_data_direction;
1824 }
1825
1826 qc->complete_fn = ata_scsi_qc_complete;
1827
ad706991 1828 if (xlat_func(qc))
ae006510 1829 goto early_finish;
1da177e4 1830
31cc23b3
TH		 1831 if (ap->ops->qc_defer) {
1832 if ((rc = ap->ops->qc_defer(qc)))
1833 goto defer;
1834 }
1835
1da177e4 1836 /* select device, send command to hardware */
8e0e694a 1837 ata_qc_issue(qc);
1da177e4
LT		 1838
1839 VPRINTK("EXIT\n");
2115ea94 1840 return 0;
1da177e4 1841
ae006510 1842early_finish:
2dcb407e 1843 ata_qc_free(qc);
b27dcfb0 1844 cmd->scsi_done(cmd);
ae006510 1845 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1846 return 0;
ae006510
DG		 1847
1848err_did:
1da177e4 1849 ata_qc_free(qc);
ae006510 1850 cmd->result = (DID_ERROR << 16);
b27dcfb0 1851 cmd->scsi_done(cmd);
253b92ec 1852err_mem:
ae006510 1853 DPRINTK("EXIT - internal\n");
2115ea94 1854 return 0;
3dc1d881
TH		 1855
1856defer:
31cc23b3 1857 ata_qc_free(qc);
3dc1d881 1858 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1859 if (rc == ATA_DEFER_LINK)
1860 return SCSI_MLQUEUE_DEVICE_BUSY;
1861 else
1862 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1863}
1864
1865/**
1866 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1867 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1868 * @flags: unsigned long variable to store irq enable status
1869 * @copy_in: copy in from user buffer
1da177e4 1870 *
87340e98 1871 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1872 *
1873 * LOCKING:
87340e98 1874 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1875 *
1876 * RETURNS:
87340e98 1877 * Pointer to response buffer.
1da177e4 1878 */
87340e98
TH		 1879static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1880 unsigned long *flags)
1da177e4 1881{
87340e98 1882 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1883
87340e98
TH		 1884 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1885 if (copy_in)
1886 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1887 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1888 return ata_scsi_rbuf;
1da177e4
LT		 1889}
1890
1891/**
1892 * ata_scsi_rbuf_put - Unmap response buffer.
1893 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1894 * @copy_out: copy out result
1895 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1896 *
87340e98
TH		 1897 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1898 * @copy_back is true.
1da177e4
LT		 1899 *
1900 * LOCKING:
87340e98 1901 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1902 */
87340e98
TH		 1903static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1904 unsigned long *flags)
1da177e4 1905{
87340e98
TH		 1906 if (copy_out)
1907 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1908 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1909 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1910}
1911
1912/**
1913 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1914 * @args: device IDENTIFY data / SCSI command of interest.
1915 * @actor: Callback hook for desired SCSI command simulator
1916 *
1917 * Takes care of the hard work of simulating a SCSI command...
1918 * Mapping the response buffer, calling the command's handler,
1919 * and handling the handler's return value. This return value
1920 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1921 * completed successfully (0), or not (in which case cmd->result
1922 * and sense buffer are assumed to be set).
1da177e4
LT		 1923 *
1924 * LOCKING:
cca3974e 1925 * spin_lock_irqsave(host lock)
1da177e4 1926 */
f0761be3 1927static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1928 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1929{
1930 u8 *rbuf;
87340e98 1931 unsigned int rc;
1da177e4 1932 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1933 unsigned long flags;
1934
87340e98
TH		 1935 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1936 rc = actor(args, rbuf);
1937 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1938
ae006510 1939 if (rc == 0)
1da177e4 1940 cmd->result = SAM_STAT_GOOD;
ae006510 1941 args->done(cmd);
1da177e4
LT		 1942}
1943
1944/**
1945 * ata_scsiop_inq_std - Simulate INQUIRY command
1946 * @args: device IDENTIFY data / SCSI command of interest.
1947 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1948 *
1949 * Returns standard device identification data associated
b142eb65 1950 * with non-VPD INQUIRY command output.
1da177e4
LT		 1951 *
1952 * LOCKING:
cca3974e 1953 * spin_lock_irqsave(host lock)
1da177e4 1954 */
87340e98 1955static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1956{
87340e98
TH		 1957 const u8 versions[] = {
1958 0x60, /* SAM-3 (no version claimed) */
1959
1960 0x03,
1961 0x20, /* SBC-2 (no version claimed) */
1962
1963 0x02,
1964 0x60 /* SPC-3 (no version claimed) */
1965 };
1da177e4
LT		 1966 u8 hdr[] = {
1967 TYPE_DISK,
1968 0,
1969 0x5, /* claim SPC-3 version compatibility */
1970 2,
1971 95 - 4
1972 };
1973
87340e98
TH		 1974 VPRINTK("ENTER\n");
1975
1da177e4
LT		 1976 /* set scsi removeable (RMB) bit per ata bit */
1977 if (ata_id_removeable(args->id))
1978 hdr[1] |= (1 << 7);
1979
1da177e4 1980 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1981 memcpy(&rbuf[8], "ATA ", 8);
1982 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1983 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1984
87340e98
TH		 1985 if (rbuf[32] == 0 || rbuf[32] == ' ')
1986 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1987
87340e98 1988 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1989
1990 return 0;
1991}
1992
1993/**
b142eb65 1994 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1995 * @args: device IDENTIFY data / SCSI command of interest.
1996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1997 *
b142eb65 1998 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1999 *
2000 * LOCKING:
cca3974e 2001 * spin_lock_irqsave(host lock)
1da177e4 2002 */
87340e98 2003static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2004{
2005 const u8 pages[] = {
2006 0x00, /* page 0x00, this page */
2007 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 2008 0x83, /* page 0x83, device ident page */
2009 0x89, /* page 0x89, ata info page */
18f0f978 2010 0xb0, /* page 0xb0, block limits page */
1e9dbc92 2011 0xb1, /* page 0xb1, block device characteristics page */
02e0a604 2012 0xb2, /* page 0xb2, thin provisioning page */
1da177e4 2013 };
1da177e4 2014
87340e98
TH		 2015 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2016 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2017 return 0;
2018}
2019
2020/**
b142eb65 2021 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2022 * @args: device IDENTIFY data / SCSI command of interest.
2023 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2024 *
2025 * Returns ATA device serial number.
2026 *
2027 * LOCKING:
cca3974e 2028 * spin_lock_irqsave(host lock)
1da177e4 2029 */
87340e98 2030static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2031{
2032 const u8 hdr[] = {
2033 0,
2034 0x80, /* this page code */
2035 0,
a0cf733b 2036 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2037 };
1da177e4 2038
87340e98
TH		 2039 memcpy(rbuf, hdr, sizeof(hdr));
2040 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2041 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2042 return 0;
2043}
2044
1da177e4 2045/**
b142eb65 2046 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2047 * @args: device IDENTIFY data / SCSI command of interest.
2048 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2049 *
b142eb65
JG		 2050 * Yields two logical unit device identification designators:
2051 * - vendor specific ASCII containing the ATA serial number
2052 * - SAT defined "t10 vendor id based" containing ASCII vendor
2053 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2054 *
2055 * LOCKING:
cca3974e 2056 * spin_lock_irqsave(host lock)
1da177e4 2057 */
87340e98 2058static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2059{
b142eb65 2060 const int sat_model_serial_desc_len = 68;
87340e98 2061 int num;
1da177e4 2062
b142eb65
JG		 2063 rbuf[1] = 0x83; /* this page code */
2064 num = 4;
2065
87340e98
TH		 2066 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2067 rbuf[num + 0] = 2;
2068 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2069 num += 4;
2070 ata_id_string(args->id, (unsigned char *) rbuf + num,
2071 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2072 num += ATA_ID_SERNO_LEN;
2073
2074 /* SAT defined lu model and serial numbers descriptor */
2075 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2076 rbuf[num + 0] = 2;
2077 rbuf[num + 1] = 1;
2078 rbuf[num + 3] = sat_model_serial_desc_len;
2079 num += 4;
2080 memcpy(rbuf + num, "ATA ", 8);
2081 num += 8;
2082 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2083 ATA_ID_PROD_LEN);
2084 num += ATA_ID_PROD_LEN;
2085 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2086 ATA_ID_SERNO_LEN);
2087 num += ATA_ID_SERNO_LEN;
2088
6b3b9d73
HR		 2089 if (ata_id_has_wwn(args->id)) {
2090 /* SAT defined lu world wide name */
2091 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2092 rbuf[num + 0] = 1;
2093 rbuf[num + 1] = 3;
2094 rbuf[num + 3] = ATA_ID_WWN_LEN;
2095 num += 4;
2096 ata_id_string(args->id, (unsigned char *) rbuf + num,
2097 ATA_ID_WWN, ATA_ID_WWN_LEN);
2098 num += ATA_ID_WWN_LEN;
2099 }
b142eb65 2100 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2101 return 0;
2102}
2103
ad355b46
JG		 2104/**
2105 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2106 * @args: device IDENTIFY data / SCSI command of interest.
2107 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2108 *
2109 * Yields SAT-specified ATA VPD page.
2110 *
2111 * LOCKING:
2112 * spin_lock_irqsave(host lock)
2113 */
87340e98 2114static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2115{
ad355b46 2116 struct ata_taskfile tf;
ad355b46 2117
ad355b46
JG		 2118 memset(&tf, 0, sizeof(tf));
2119
87340e98
TH		 2120 rbuf[1] = 0x89; /* our page code */
2121 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2122 rbuf[3] = (0x238 & 0xff);
ad355b46 2123
87340e98
TH		 2124 memcpy(&rbuf[8], "linux ", 8);
2125 memcpy(&rbuf[16], "libata ", 16);
2126 memcpy(&rbuf[32], DRV_VERSION, 4);
ad355b46
JG		 2127
2128 /* we don't store the ATA device signature, so we fake it */
2129
2130 tf.command = ATA_DRDY; /* really, this is Status reg */
2131 tf.lbal = 0x1;
2132 tf.nsect = 0x1;
2133
87340e98
TH		 2134 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2135 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2136
87340e98 2137 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2138
87340e98 2139 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2140 return 0;
2141}
2142
18f0f978
CH		 2143static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2144{
295124dc 2145 u16 min_io_sectors;
18f0f978
CH		 2146
2147 rbuf[1] = 0xb0;
2148 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2149
2150 /*
2151 * Optimal transfer length granularity.
2152 *
2153 * This is always one physical block, but for disks with a smaller
2154 * logical than physical sector size we need to figure out what the
2155 * latter is.
2156 */
295124dc 2157 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
18f0f978
CH		 2158 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2159
2160 /*
2161 * Optimal unmap granularity.
2162 *
2163 * The ATA spec doesn't even know about a granularity or alignment
2164 * for the TRIM command. We can leave away most of the unmap related
2165 * VPD page entries, but we have specifify a granularity to signal
2166 * that we support some form of unmap - in thise case via WRITE SAME
2167 * with the unmap bit set.
2168 */
e78db4df 2169 if (ata_id_has_trim(args->id)) {
5f4e2066 2170 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
18f0f978 2171 put_unaligned_be32(1, &rbuf[28]);
e78db4df 2172 }
18f0f978
CH		 2173
2174 return 0;
2175}
2176
1e9dbc92
MW		 2177static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2178{
4bca3286
MP		 2179 int form_factor = ata_id_form_factor(args->id);
2180 int media_rotation_rate = ata_id_rotation_rate(args->id);
2181
1e9dbc92
MW		 2182 rbuf[1] = 0xb1;
2183 rbuf[3] = 0x3c;
4bca3286
MP		 2184 rbuf[4] = media_rotation_rate >> 8;
2185 rbuf[5] = media_rotation_rate;
2186 rbuf[7] = form_factor;
1e9dbc92
MW		 2187
2188 return 0;
2189}
2190
02e0a604
MP		 2191static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2192{
2193 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2194 rbuf[1] = 0xb2;
2195 rbuf[3] = 0x4;
2196 rbuf[5] = 1 << 6; /* TPWS */
2197
2198 return 0;
2199}
2200
1da177e4 2201/**
0cba632b 2202 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2203 * @args: device IDENTIFY data / SCSI command of interest.
2204 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2205 *
2206 * No operation. Simply returns success to caller, to indicate
2207 * that the caller should successfully complete this SCSI command.
2208 *
2209 * LOCKING:
cca3974e 2210 * spin_lock_irqsave(host lock)
1da177e4 2211 */
87340e98 2212static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2213{
2214 VPRINTK("ENTER\n");
2215 return 0;
2216}
2217
6ca8e794
PB		 2218/**
2219 * modecpy - Prepare response for MODE SENSE
2220 * @dest: output buffer
2221 * @src: data being copied
2222 * @n: length of mode page
2223 * @changeable: whether changeable parameters are requested
2224 *
2225 * Generate a generic MODE SENSE page for either current or changeable
2226 * parameters.
2227 *
2228 * LOCKING:
2229 * None.
2230 */
2231static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2232{
2233 if (changeable) {
2234 memcpy(dest, src, 2);
2235 memset(dest + 2, 0, n - 2);
2236 } else {
2237 memcpy(dest, src, n);
2238 }
2239}
2240
1da177e4
LT		 2241/**
2242 * ata_msense_caching - Simulate MODE SENSE caching info page
2243 * @id: device IDENTIFY data
87340e98 2244 * @buf: output buffer
6ca8e794 2245 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2246 *
2247 * Generate a caching info page, which conditionally indicates
2248 * write caching to the SCSI layer, depending on device
2249 * capabilities.
2250 *
2251 * LOCKING:
2252 * None.
2253 */
6ca8e794 2254static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
1da177e4 2255{
6ca8e794 2256 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
1b26d29c 2257 if (changeable || ata_id_wcache_enabled(id))
87340e98 2258 buf[2] |= (1 << 2); /* write cache enable */
6ca8e794 2259 if (!changeable && !ata_id_rahead_enabled(id))
87340e98
TH		 2260 buf[12] |= (1 << 5); /* disable read ahead */
2261 return sizeof(def_cache_mpage);
1da177e4
LT		 2262}
2263
2264/**
2265 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2266 * @buf: output buffer
6ca8e794 2267 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2268 *
2269 * Generate a generic MODE SENSE control mode page.
2270 *
2271 * LOCKING:
2272 * None.
2273 */
6ca8e794 2274static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
1da177e4 2275{
6ca8e794 2276 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
00ac37f5 2277 return sizeof(def_control_mpage);
1da177e4
LT		 2278}
2279
2280/**
2281 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2282 * @buf: output buffer
6ca8e794 2283 * @changeable: whether changeable parameters are requested
1da177e4
LT		 2284 *
2285 * Generate a generic MODE SENSE r/w error recovery page.
2286 *
2287 * LOCKING:
2288 * None.
2289 */
6ca8e794 2290static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
1da177e4 2291{
6ca8e794
PB		 2292 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2293 changeable);
00ac37f5 2294 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2295}
2296
48bdc8ec
JA		 2297/*
2298 * We can turn this into a real blacklist if it's needed, for now just
2299 * blacklist any Maxtor BANC1G10 revision firmware
2300 */
2301static int ata_dev_supports_fua(u16 *id)
2302{
a0cf733b 2303 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2304
c3c013a2
JG		 2305 if (!libata_fua)
2306 return 0;
48bdc8ec
JA		 2307 if (!ata_id_has_fua(id))
2308 return 0;
2309
a0cf733b
TH		 2310 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2311 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2312
2e02671d 2313 if (strcmp(model, "Maxtor"))
48bdc8ec 2314 return 1;
2e02671d 2315 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2316 return 1;
2317
2318 return 0; /* blacklisted */
2319}
2320
1da177e4
LT		 2321/**
2322 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2323 * @args: device IDENTIFY data / SCSI command of interest.
2324 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2325 *
00ac37f5
DG		 2326 * Simulate MODE SENSE commands. Assume this is invoked for direct
2327 * access devices (e.g. disks) only. There should be no block
2328 * descriptor for other device types.
1da177e4
LT		 2329 *
2330 * LOCKING:
cca3974e 2331 * spin_lock_irqsave(host lock)
1da177e4 2332 */
87340e98 2333static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2334{
9a3dccc4 2335 struct ata_device *dev = args->dev;
87340e98 2336 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2337 const u8 sat_blk_desc[] = {
2338 0, 0, 0, 0, /* number of blocks: sat unspecified */
2339 0,
2340 0, 0x2, 0x0 /* block length: 512 bytes */
2341 };
2342 u8 pg, spg;
87340e98 2343 unsigned int ebd, page_control, six_byte;
9a3dccc4 2344 u8 dpofua;
1da177e4
LT		 2345
2346 VPRINTK("ENTER\n");
2347
2348 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2349 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2350 /*
2351 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2352 */
00ac37f5 2353
1da177e4 2354 page_control = scsicmd[2] >> 6;
ae006510
DG		 2355 switch (page_control) {
2356 case 0: /* current */
6ca8e794
PB		 2357 case 1: /* changeable */
2358 case 2: /* defaults */
ae006510
DG		 2359 break; /* supported */
2360 case 3: /* saved */
2361 goto saving_not_supp;
ae006510
DG		 2362 default:
2363 goto invalid_fld;
2364 }
1da177e4 2365
87340e98
TH		 2366 if (six_byte)
2367 p += 4 + (ebd ? 8 : 0);
2368 else
2369 p += 8 + (ebd ? 8 : 0);
1da177e4 2370
00ac37f5
DG		 2371 pg = scsicmd[2] & 0x3f;
2372 spg = scsicmd[3];
2373 /*
2374 * No mode subpages supported (yet) but asking for _all_
2375 * subpages may be valid
2376 */
2377 if (spg && (spg != ALL_SUB_MPAGES))
2378 goto invalid_fld;
2379
2380 switch(pg) {
2381 case RW_RECOVERY_MPAGE:
6ca8e794 2382 p += ata_msense_rw_recovery(p, page_control == 1);
1da177e4
LT		 2383 break;
2384
00ac37f5 2385 case CACHE_MPAGE:
6ca8e794 2386 p += ata_msense_caching(args->id, p, page_control == 1);
1da177e4
LT		 2387 break;
2388
87340e98 2389 case CONTROL_MPAGE:
6ca8e794 2390 p += ata_msense_ctl_mode(p, page_control == 1);
1da177e4 2391 break;
1da177e4 2392
00ac37f5 2393 case ALL_MPAGES:
6ca8e794
PB		 2394 p += ata_msense_rw_recovery(p, page_control == 1);
2395 p += ata_msense_caching(args->id, p, page_control == 1);
2396 p += ata_msense_ctl_mode(p, page_control == 1);
1da177e4
LT		 2397 break;
2398
2399 default: /* invalid page code */
ae006510 2400 goto invalid_fld;
1da177e4
LT		 2401 }
2402
9a3dccc4 2403 dpofua = 0;
f79d409f 2404 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2405 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2406 dpofua = 1 << 4;
2407
1da177e4 2408 if (six_byte) {
87340e98
TH		 2409 rbuf[0] = p - rbuf - 1;
2410 rbuf[2] |= dpofua;
00ac37f5 2411 if (ebd) {
87340e98
TH		 2412 rbuf[3] = sizeof(sat_blk_desc);
2413 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2414 }
1da177e4 2415 } else {
87340e98
TH		 2416 unsigned int output_len = p - rbuf - 2;
2417
1da177e4 2418 rbuf[0] = output_len >> 8;
87340e98
TH		 2419 rbuf[1] = output_len;
2420 rbuf[3] |= dpofua;
00ac37f5 2421 if (ebd) {
87340e98
TH		 2422 rbuf[7] = sizeof(sat_blk_desc);
2423 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2424 }
1da177e4 2425 }
1da177e4 2426 return 0;
ae006510
DG		 2427
2428invalid_fld:
2429 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2430 /* "Invalid field in cbd" */
2431 return 1;
2432
2433saving_not_supp:
2434 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2435 /* "Saving parameters not supported" */
2436 return 1;
1da177e4
LT		 2437}
2438
2439/**
2440 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2441 * @args: device IDENTIFY data / SCSI command of interest.
2442 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2443 *
2444 * Simulate READ CAPACITY commands.
2445 *
2446 * LOCKING:
6a36261e 2447 * None.
1da177e4 2448 */
87340e98 2449static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2450{
61d79a8e
MP		 2451 struct ata_device *dev = args->dev;
2452 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
295124dc
GG		 2453 u32 sector_size; /* physical sector size in bytes */
2454 u8 log2_per_phys;
2455 u16 lowest_aligned;
2456
2457 sector_size = ata_id_logical_sector_size(dev->id);
2458 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2459 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
1da177e4
LT		 2460
2461 VPRINTK("ENTER\n");
2462
1da177e4 2463 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2464 if (last_lba >= 0xffffffffULL)
2465 last_lba = 0xffffffff;
0c144d0d 2466
1da177e4 2467 /* sector count, 32-bit */
87340e98
TH		 2468 rbuf[0] = last_lba >> (8 * 3);
2469 rbuf[1] = last_lba >> (8 * 2);
2470 rbuf[2] = last_lba >> (8 * 1);
2471 rbuf[3] = last_lba;
1da177e4
LT		 2472
2473 /* sector size */
295124dc
GG		 2474 rbuf[4] = sector_size >> (8 * 3);
2475 rbuf[5] = sector_size >> (8 * 2);
2476 rbuf[6] = sector_size >> (8 * 1);
2477 rbuf[7] = sector_size;
1da177e4
LT		 2478 } else {
2479 /* sector count, 64-bit */
87340e98
TH		 2480 rbuf[0] = last_lba >> (8 * 7);
2481 rbuf[1] = last_lba >> (8 * 6);
2482 rbuf[2] = last_lba >> (8 * 5);
2483 rbuf[3] = last_lba >> (8 * 4);
2484 rbuf[4] = last_lba >> (8 * 3);
2485 rbuf[5] = last_lba >> (8 * 2);
2486 rbuf[6] = last_lba >> (8 * 1);
2487 rbuf[7] = last_lba;
1da177e4
LT		 2488
2489 /* sector size */
295124dc
GG		 2490 rbuf[ 8] = sector_size >> (8 * 3);
2491 rbuf[ 9] = sector_size >> (8 * 2);
2492 rbuf[10] = sector_size >> (8 * 1);
2493 rbuf[11] = sector_size;
61d79a8e
MP		 2494
2495 rbuf[12] = 0;
295124dc 2496 rbuf[13] = log2_per_phys;
61d79a8e
MP		 2497 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2498 rbuf[15] = lowest_aligned;
18f0f978 2499
e78db4df
MP		 2500 if (ata_id_has_trim(args->id)) {
2501 rbuf[14] |= 0x80; /* TPE */
2502
2503 if (ata_id_has_zero_after_trim(args->id))
2504 rbuf[14] |= 0x40; /* TPRZ */
2505 }
1da177e4
LT		 2506 }
2507
2508 return 0;
2509}
2510
2511/**
2512 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2513 * @args: device IDENTIFY data / SCSI command of interest.
2514 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2515 *
2516 * Simulate REPORT LUNS command.
2517 *
2518 * LOCKING:
cca3974e 2519 * spin_lock_irqsave(host lock)
1da177e4 2520 */
87340e98 2521static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2522{
2523 VPRINTK("ENTER\n");
2524 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2525
2526 return 0;
2527}
2528
77853bf2 2529static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2530{
74e6c8c3 2531 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2532 /* FIXME: not quite right; we don't want the
2533 * translation of taskfile registers into
2534 * a sense descriptors, since that's only
2535 * correct for ATA, not ATAPI
2536 */
750426aa 2537 ata_gen_passthru_sense(qc);
74e6c8c3 2538 }
a939c963 2539
c6e6e666 2540 qc->scsidone(qc->scsicmd);
77853bf2 2541 ata_qc_free(qc);
c6e6e666 2542}
a939c963 2543
c6e6e666
JG		 2544/* is it pointless to prefer PIO for "safety reasons"? */
2545static inline int ata_pio_use_silly(struct ata_port *ap)
2546{
2547 return (ap->flags & ATA_FLAG_PIO_DMA);
2548}
2549
2550static void atapi_request_sense(struct ata_queued_cmd *qc)
2551{
2552 struct ata_port *ap = qc->ap;
2553 struct scsi_cmnd *cmd = qc->scsicmd;
2554
2555 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2556
2557 /* FIXME: is this needed? */
7ccd720d 2558 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2559
127102ae 2560#ifdef CONFIG_ATA_SFF
855d854a
JB		 2561 if (ap->ops->sff_tf_read)
2562 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2563#endif
c6e6e666
JG		 2564
2565 /* fill these in, for the case where they are -not- overwritten */
2566 cmd->sense_buffer[0] = 0x70;
2567 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2568
2569 ata_qc_reinit(qc);
2570
93f8fecb 2571 /* setup sg table and init transfer direction */
cadb7345 2572 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2573 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2574 qc->dma_dir = DMA_FROM_DEVICE;
2575
6e7846e9 2576 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2577 qc->cdb[0] = REQUEST_SENSE;
2578 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2579
2580 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2581 qc->tf.command = ATA_CMD_PACKET;
2582
c6e6e666 2583 if (ata_pio_use_silly(ap)) {
0dc36888 2584 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2585 qc->tf.feature |= ATAPI_PKT_DMA;
2586 } else {
0dc36888 2587 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2588 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2589 qc->tf.lbah = 0;
c6e6e666 2590 }
a939c963
JG		 2591 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2592
c6e6e666 2593 qc->complete_fn = atapi_sense_complete;
a939c963 2594
8e0e694a 2595 ata_qc_issue(qc);
a939c963
JG		 2596
2597 DPRINTK("EXIT\n");
2598}
2599
77853bf2 2600static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2601{
2602 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2603 unsigned int err_mask = qc->err_mask;
1da177e4 2604
a7dac447 2605 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2606
246619da
TH		 2607 /* handle completion from new EH */
2608 if (unlikely(qc->ap->ops->error_handler &&
2609 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2610
2611 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2612 /* FIXME: not quite right; we don't want the
2613 * translation of taskfile registers into a
2614 * sense descriptors, since that's only
2615 * correct for ATA, not ATAPI
2616 */
750426aa 2617 ata_gen_passthru_sense(qc);
246619da
TH		 2618 }
2619
22aac089
TH		 2620 /* SCSI EH automatically locks door if sdev->locked is
2621 * set. Sometimes door lock request continues to
2622 * fail, for example, when no media is present. This
2623 * creates a loop - SCSI EH issues door lock which
2624 * fails and gets invoked again to acquire sense data
2625 * for the failed command.
2626 *
2627 * If door lock fails, always clear sdev->locked to
2628 * avoid this infinite loop.
2a5f07b5
TH		 2629 *
2630 * This may happen before SCSI scan is complete. Make
2631 * sure qc->dev->sdev isn't NULL before dereferencing.
22aac089 2632 */
2a5f07b5 2633 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
22aac089
TH		 2634 qc->dev->sdev->locked = 0;
2635
246619da
TH		 2636 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2637 qc->scsidone(cmd);
2638 ata_qc_free(qc);
2639 return;
2640 }
2641
2642 /* successful completion or old EH failure path */
a7dac447 2643 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2644 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2645 atapi_request_sense(qc);
77853bf2 2646 return;
74e6c8c3 2647 } else if (unlikely(err_mask)) {
a7dac447
JG		 2648 /* FIXME: not quite right; we don't want the
2649 * translation of taskfile registers into
2650 * a sense descriptors, since that's only
2651 * correct for ATA, not ATAPI
2652 */
750426aa 2653 ata_gen_passthru_sense(qc);
74e6c8c3 2654 } else {
1da177e4
LT		 2655 u8 *scsicmd = cmd->cmnd;
2656
fd71da46 2657 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2658 unsigned long flags;
87340e98 2659 u8 *buf;
b445c568 2660
87340e98 2661 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2662
2663 /* ATAPI devices typically report zero for their SCSI version,
2664 * and sometimes deviate from the spec WRT response data
2665 * format. If SCSI version is reported as zero like normal,
2666 * then we make the following fixups: 1) Fake MMC-5 version,
2667 * to indicate to the Linux scsi midlayer this is a modern
2668 * device. 2) Ensure response data format / ATAPI information
2669 * are always correct.
a15dbeb4
JG		 2670 */
2671 if (buf[2] == 0) {
2672 buf[2] = 0x5;
2673 buf[3] = 0x32;
2674 }
2675
87340e98 2676 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2677 }
a15dbeb4 2678
1da177e4
LT		 2679 cmd->result = SAM_STAT_GOOD;
2680 }
2681
2682 qc->scsidone(cmd);
77853bf2 2683 ata_qc_free(qc);
1da177e4
LT		 2684}
2685/**
2686 * atapi_xlat - Initialize PACKET taskfile
2687 * @qc: command structure to be initialized
1da177e4
LT		 2688 *
2689 * LOCKING:
cca3974e 2690 * spin_lock_irqsave(host lock)
1da177e4
LT		 2691 *
2692 * RETURNS:
2693 * Zero on success, non-zero on failure.
2694 */
ad706991 2695static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2696{
542b1444 2697 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2698 struct ata_device *dev = qc->dev;
542b1444 2699 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2700 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2701 unsigned int nbytes;
1da177e4 2702
2e5704f6
TH		 2703 memset(qc->cdb, 0, dev->cdb_len);
2704 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2705
2706 qc->complete_fn = atapi_qc_complete;
2707
2708 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2709 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2710 qc->tf.flags |= ATA_TFLAG_WRITE;
2711 DPRINTK("direction: write\n");
2712 }
2713
2714 qc->tf.command = ATA_CMD_PACKET;
aacda375 2715 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2716
2717 /* check whether ATAPI DMA is safe */
5895ef9a 2718 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2719 using_pio = 1;
1da177e4 2720
e190222d
TH		 2721 /* Some controller variants snoop this value for Packet
2722 * transfers to do state machine and FIFO management. Thus we
2723 * want to set it properly, and for DMA where it is
2724 * effectively meaningless.
2725 */
aacda375 2726 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2727
e190222d
TH		 2728 /* Most ATAPI devices which honor transfer chunk size don't
2729 * behave according to the spec when odd chunk size which
2730 * matches the transfer length is specified. If the number of
2731 * bytes to transfer is 2n+1. According to the spec, what
2732 * should happen is to indicate that 2n+1 is going to be
2733 * transferred and transfer 2n+2 bytes where the last byte is
2734 * padding.
2735 *
2736 * In practice, this doesn't happen. ATAPI devices first
2737 * indicate and transfer 2n bytes and then indicate and
2738 * transfer 2 bytes where the last byte is padding.
2739 *
2740 * This inconsistency confuses several controllers which
2741 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2742 * These controllers use actual number of transferred bytes to
2743 * update DMA poitner and transfer of 4n+2 bytes make those
2744 * controller push DMA pointer by 4n+4 bytes because SATA data
2745 * FISes are aligned to 4 bytes. This causes data corruption
2746 * and buffer overrun.
2747 *
2748 * Always setting nbytes to even number solves this problem
2749 * because then ATAPI devices don't have to split data at 2n
2750 * boundaries.
2751 */
2752 if (nbytes & 0x1)
2753 nbytes++;
2754
2db78dd3
AC		 2755 qc->tf.lbam = (nbytes & 0xFF);
2756 qc->tf.lbah = (nbytes >> 8);
2757
5895ef9a
TH		 2758 if (nodata)
2759 qc->tf.protocol = ATAPI_PROT_NODATA;
2760 else if (using_pio)
2761 qc->tf.protocol = ATAPI_PROT_PIO;
2762 else {
e00f1ff3 2763 /* DMA data xfer */
0dc36888 2764 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2765 qc->tf.feature |= ATAPI_PKT_DMA;
2766
91163006
TH		 2767 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2768 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2769 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2770 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2771 }
2772
2db78dd3
AC		 2773
2774 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2775 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2776 return 0;
2777}
2778
2dcb407e 2779static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2780{
071f44b1 2781 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2782 if (likely(devno < ata_link_max_devices(&ap->link)))
2783 return &ap->link.device[devno];
2784 } else {
2785 if (likely(devno < ap->nr_pmp_links))
2786 return &ap->pmp_link[devno].device[0];
2787 }
2788
ab5b3a5b
TH		 2789 return NULL;
2790}
2791
2dcb407e
JG		 2792static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2793 const struct scsi_device *scsidev)
ab5b3a5b 2794{
41bda9c9
TH		 2795 int devno;
2796
ab5b3a5b 2797 /* skip commands not addressed to targets we simulate */
071f44b1 2798 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2799 if (unlikely(scsidev->channel || scsidev->lun))
2800 return NULL;
2801 devno = scsidev->id;
2802 } else {
2803 if (unlikely(scsidev->id || scsidev->lun))
2804 return NULL;
2805 devno = scsidev->channel;
2806 }
ab5b3a5b 2807
41bda9c9 2808 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2809}
2810
1da177e4
LT		 2811/**
2812 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2813 * @ap: ATA port to which the device is attached
2814 * @scsidev: SCSI device from which we derive the ATA device
2815 *
2816 * Given various information provided in struct scsi_cmnd,
2817 * map that onto an ATA bus, and using that mapping
2818 * determine which ata_device is associated with the
2819 * SCSI command to be sent.
2820 *
2821 * LOCKING:
cca3974e 2822 * spin_lock_irqsave(host lock)
1da177e4
LT		 2823 *
2824 * RETURNS:
2825 * Associated ATA device, or %NULL if not found.
2826 */
1da177e4 2827static struct ata_device *
057ace5e 2828ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2829{
ab5b3a5b 2830 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2831
2486fa56 2832 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2833 return NULL;
2834
1da177e4
LT		 2835 return dev;
2836}
2837
b095518e
JG		 2838/*
2839 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2840 * @byte1: Byte 1 from pass-thru CDB.
2841 *
2842 * RETURNS:
2843 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2844 */
2845static u8
2846ata_scsi_map_proto(u8 byte1)
2847{
2848 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2849 case 3: /* Non-data */
2850 return ATA_PROT_NODATA;
2851
2852 case 6: /* DMA */
2853 case 10: /* UDMA Data-in */
2854 case 11: /* UDMA Data-Out */
2855 return ATA_PROT_DMA;
2856
2857 case 4: /* PIO Data-in */
2858 case 5: /* PIO Data-out */
2859 return ATA_PROT_PIO;
2860
2861 case 0: /* Hard Reset */
2862 case 1: /* SRST */
2863 case 8: /* Device Diagnostic */
2864 case 9: /* Device Reset */
2865 case 7: /* DMA Queued */
2866 case 12: /* FPDMA */
2867 case 15: /* Return Response Info */
2868 default: /* Reserved */
2869 break;
b095518e
JG		 2870 }
2871
2872 return ATA_PROT_UNKNOWN;
2873}
2874
2875/**
2876 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2877 * @qc: command structure to be initialized
b095518e
JG		 2878 *
2879 * Handles either 12 or 16-byte versions of the CDB.
2880 *
2881 * RETURNS:
2882 * Zero on success, non-zero on failure.
2883 */
ad706991 2884static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2885{
2886 struct ata_taskfile *tf = &(qc->tf);
542b1444 2887 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2888 struct ata_device *dev = qc->dev;
ad706991 2889 const u8 *cdb = scmd->cmnd;
b095518e 2890
542b1444 2891 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2892 goto invalid_fld;
8190bdb9 2893
b095518e
JG		 2894 /*
2895 * 12 and 16 byte CDBs use different offsets to
2896 * provide the various register values.
2897 */
542b1444 2898 if (cdb[0] == ATA_16) {
b095518e
JG		 2899 /*
2900 * 16-byte CDB - may contain extended commands.
2901 *
2902 * If that is the case, copy the upper byte register values.
2903 */
542b1444
TH		 2904 if (cdb[1] & 0x01) {
2905 tf->hob_feature = cdb[3];
2906 tf->hob_nsect = cdb[5];
2907 tf->hob_lbal = cdb[7];
2908 tf->hob_lbam = cdb[9];
2909 tf->hob_lbah = cdb[11];
b095518e
JG		 2910 tf->flags |= ATA_TFLAG_LBA48;
2911 } else
2912 tf->flags &= ~ATA_TFLAG_LBA48;
2913
2914 /*
2915 * Always copy low byte, device and command registers.
2916 */
542b1444
TH		 2917 tf->feature = cdb[4];
2918 tf->nsect = cdb[6];
2919 tf->lbal = cdb[8];
2920 tf->lbam = cdb[10];
2921 tf->lbah = cdb[12];
2922 tf->device = cdb[13];
2923 tf->command = cdb[14];
b095518e
JG		 2924 } else {
2925 /*
2926 * 12-byte CDB - incapable of extended commands.
2927 */
2928 tf->flags &= ~ATA_TFLAG_LBA48;
2929
542b1444
TH		 2930 tf->feature = cdb[3];
2931 tf->nsect = cdb[4];
2932 tf->lbal = cdb[5];
2933 tf->lbam = cdb[6];
2934 tf->lbah = cdb[7];
2935 tf->device = cdb[8];
2936 tf->command = cdb[9];
b095518e 2937 }
fa4453c4
AL		 2938
2939 /* enforce correct master/slave bit */
2940 tf->device = dev->devno ?
2941 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2942
bd30add8 2943 switch (tf->command) {
295124dc 2944 /* READ/WRITE LONG use a non-standard sect_size */
bd30add8
TH		 2945 case ATA_CMD_READ_LONG:
2946 case ATA_CMD_READ_LONG_ONCE:
2947 case ATA_CMD_WRITE_LONG:
2948 case ATA_CMD_WRITE_LONG_ONCE:
2949 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2950 goto invalid_fld;
2951 qc->sect_size = scsi_bufflen(scmd);
295124dc
GG		 2952 break;
2953
2954 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2955 case ATA_CMD_CFA_WRITE_NE:
2956 case ATA_CMD_CFA_TRANS_SECT:
2957 case ATA_CMD_CFA_WRITE_MULT_NE:
2958 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2959 case ATA_CMD_READ:
2960 case ATA_CMD_READ_EXT:
2961 case ATA_CMD_READ_QUEUED:
2962 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2963 case ATA_CMD_FPDMA_READ:
2964 case ATA_CMD_READ_MULTI:
2965 case ATA_CMD_READ_MULTI_EXT:
2966 case ATA_CMD_PIO_READ:
2967 case ATA_CMD_PIO_READ_EXT:
2968 case ATA_CMD_READ_STREAM_DMA_EXT:
2969 case ATA_CMD_READ_STREAM_EXT:
2970 case ATA_CMD_VERIFY:
2971 case ATA_CMD_VERIFY_EXT:
2972 case ATA_CMD_WRITE:
2973 case ATA_CMD_WRITE_EXT:
2974 case ATA_CMD_WRITE_FUA_EXT:
2975 case ATA_CMD_WRITE_QUEUED:
2976 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2977 case ATA_CMD_FPDMA_WRITE:
2978 case ATA_CMD_WRITE_MULTI:
2979 case ATA_CMD_WRITE_MULTI_EXT:
2980 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2981 case ATA_CMD_PIO_WRITE:
2982 case ATA_CMD_PIO_WRITE_EXT:
2983 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2984 case ATA_CMD_WRITE_STREAM_EXT:
2985 qc->sect_size = scmd->device->sector_size;
2986 break;
2987
2988 /* Everything else uses 512 byte "sectors" */
2989 default:
2990 qc->sect_size = ATA_SECT_SIZE;
bd30add8
TH		 2991 }
2992
2993 /*
2994 * Set flags so that all registers will be written, pass on
2995 * write indication (used for PIO/DMA setup), result TF is
2996 * copied back and we don't whine too much about its failure.
2997 */
bc496ed0 2998 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
bd30add8
TH		 2999 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3000 tf->flags |= ATA_TFLAG_WRITE;
3001
3002 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3003
3004 /*
3005 * Set transfer length.
3006 *
3007 * TODO: find out if we need to do more here to
3008 * cover scatter/gather case.
3009 */
3010 ata_qc_set_pc_nbytes(qc);
3011
3012 /* We may not issue DMA commands if no DMA mode is set */
3013 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3014 goto invalid_fld;
3015
1dce589c
AL		 3016 /* sanity check for pio multi commands */
3017 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3018 goto invalid_fld;
3019
3020 if (is_multi_taskfile(tf)) {
3021 unsigned int multi_count = 1 << (cdb[1] >> 5);
3022
3023 /* compare the passed through multi_count
3024 * with the cached multi_count of libata
3025 */
3026 if (multi_count != dev->multi_count)
a9a79dfe
JP		 3027 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3028 multi_count);
d26fc955 3029 }
1dce589c 3030
b095518e
JG		 3031 /*
3032 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3033 * SET_FEATURES - XFER MODE must be preceded/succeeded
3034 * by an update to hardware-specific registers for each
3035 * controller (i.e. the reason for ->set_piomode(),
3036 * ->set_dmamode(), and ->post_set_mode() hooks).
3037 */
bd30add8
TH		 3038 if (tf->command == ATA_CMD_SET_FEATURES &&
3039 tf->feature == SETFEATURES_XFER)
9a405257 3040 goto invalid_fld;
b095518e
JG		 3041
3042 /*
bd30add8
TH		 3043 * Filter TPM commands by default. These provide an
3044 * essentially uncontrolled encrypted "back door" between
3045 * applications and the disk. Set libata.allow_tpm=1 if you
3046 * have a real reason for wanting to use them. This ensures
3047 * that installed software cannot easily mess stuff up without
3048 * user intent. DVR type users will probably ship with this enabled
3049 * for movie content management.
b095518e 3050 *
bd30add8
TH		 3051 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3052 * for this and should do in future but that it is not sufficient as
3053 * DCS is an optional feature set. Thus we also do the software filter
3054 * so that we comply with the TC consortium stated goal that the user
3055 * can turn off TC features of their system.
b095518e 3056 */
bd30add8
TH		 3057 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3058 goto invalid_fld;
e61e0672 3059
b095518e 3060 return 0;
9a405257
TH		 3061
3062 invalid_fld:
542b1444 3063 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 3064 /* "Invalid field in cdb" */
3065 return 1;
b095518e
JG		 3066}
3067
18f0f978
CH		 3068static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3069{
3070 struct ata_taskfile *tf = &qc->tf;
3071 struct scsi_cmnd *scmd = qc->scsicmd;
3072 struct ata_device *dev = qc->dev;
3073 const u8 *cdb = scmd->cmnd;
3074 u64 block;
3075 u32 n_block;
3076 u32 size;
3077 void *buf;
3078
3079 /* we may not issue DMA commands if no DMA mode is set */
3080 if (unlikely(!dev->dma_mode))
3081 goto invalid_fld;
3082
3083 if (unlikely(scmd->cmd_len < 16))
3084 goto invalid_fld;
3085 scsi_16_lba_len(cdb, &block, &n_block);
3086
3087 /* for now we only support WRITE SAME with the unmap bit set */
3088 if (unlikely(!(cdb[1] & 0x8)))
3089 goto invalid_fld;
3090
3091 /*
3092 * WRITE SAME always has a sector sized buffer as payload, this
3093 * should never be a multiple entry S/G list.
3094 */
3095 if (!scsi_sg_count(scmd))
3096 goto invalid_fld;
3097
3098 buf = page_address(sg_page(scsi_sglist(scmd)));
d0634c4a 3099 size = ata_set_lba_range_entries(buf, 512, block, n_block);
18f0f978
CH		 3100
3101 tf->protocol = ATA_PROT_DMA;
3102 tf->hob_feature = 0;
3103 tf->feature = ATA_DSM_TRIM;
3104 tf->hob_nsect = (size / 512) >> 8;
3105 tf->nsect = size / 512;
3106 tf->command = ATA_CMD_DSM;
3107 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3108 ATA_TFLAG_WRITE;
3109
3110 ata_qc_set_pc_nbytes(qc);
3111
3112 return 0;
3113
3114 invalid_fld:
3115 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3116 /* "Invalid field in cdb" */
3117 return 1;
3118}
3119
1b26d29c
PB		 3120/**
3121 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3122 * @qc: Storage for translated ATA taskfile
3123 * @buf: input buffer
3124 * @len: number of valid bytes in the input buffer
3125 *
3126 * Prepare a taskfile to modify caching information for the device.
3127 *
3128 * LOCKING:
3129 * None.
3130 */
3131static int ata_mselect_caching(struct ata_queued_cmd *qc,
3132 const u8 *buf, int len)
3133{
3134 struct ata_taskfile *tf = &qc->tf;
3135 struct ata_device *dev = qc->dev;
3136 char mpage[CACHE_MPAGE_LEN];
3137 u8 wce;
3138
3139 /*
3140 * The first two bytes of def_cache_mpage are a header, so offsets
3141 * in mpage are off by 2 compared to buf. Same for len.
3142 */
3143
3144 if (len != CACHE_MPAGE_LEN - 2)
3145 return -EINVAL;
3146
3147 wce = buf[0] & (1 << 2);
3148
3149 /*
3150 * Check that read-only bits are not modified.
3151 */
3152 ata_msense_caching(dev->id, mpage, false);
3153 mpage[2] &= ~(1 << 2);
3154 mpage[2] |= wce;
3155 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3156 return -EINVAL;
3157
3158 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3159 tf->protocol = ATA_PROT_NODATA;
3160 tf->nsect = 0;
3161 tf->command = ATA_CMD_SET_FEATURES;
3162 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3163 return 0;
3164}
3165
3166/**
3167 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3168 * @qc: Storage for translated ATA taskfile
3169 *
3170 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3171 * Assume this is invoked for direct access devices (e.g. disks) only.
3172 * There should be no block descriptor for other device types.
3173 *
3174 * LOCKING:
3175 * spin_lock_irqsave(host lock)
3176 */
3177static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3178{
3179 struct scsi_cmnd *scmd = qc->scsicmd;
3180 const u8 *cdb = scmd->cmnd;
3181 const u8 *p;
3182 u8 pg, spg;
3183 unsigned six_byte, pg_len, hdr_len, bd_len;
3184 int len;
3185
3186 VPRINTK("ENTER\n");
3187
3188 six_byte = (cdb[0] == MODE_SELECT);
3189 if (six_byte) {
3190 if (scmd->cmd_len < 5)
3191 goto invalid_fld;
3192
3193 len = cdb[4];
3194 hdr_len = 4;
3195 } else {
3196 if (scmd->cmd_len < 9)
3197 goto invalid_fld;
3198
3199 len = (cdb[7] << 8) + cdb[8];
3200 hdr_len = 8;
3201 }
3202
3203 /* We only support PF=1, SP=0. */
3204 if ((cdb[1] & 0x11) != 0x10)
3205 goto invalid_fld;
3206
3207 /* Test early for possible overrun. */
3208 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3209 goto invalid_param_len;
3210
3211 p = page_address(sg_page(scsi_sglist(scmd)));
3212
3213 /* Move past header and block descriptors. */
3214 if (len < hdr_len)
3215 goto invalid_param_len;
3216
3217 if (six_byte)
3218 bd_len = p[3];
3219 else
3220 bd_len = (p[6] << 8) + p[7];
3221
3222 len -= hdr_len;
3223 p += hdr_len;
3224 if (len < bd_len)
3225 goto invalid_param_len;
3226 if (bd_len != 0 && bd_len != 8)
3227 goto invalid_param;
3228
3229 len -= bd_len;
3230 p += bd_len;
3231 if (len == 0)
3232 goto skip;
3233
3234 /* Parse both possible formats for the mode page headers. */
3235 pg = p[0] & 0x3f;
3236 if (p[0] & 0x40) {
3237 if (len < 4)
3238 goto invalid_param_len;
3239
3240 spg = p[1];
3241 pg_len = (p[2] << 8) | p[3];
3242 p += 4;
3243 len -= 4;
3244 } else {
3245 if (len < 2)
3246 goto invalid_param_len;
3247
3248 spg = 0;
3249 pg_len = p[1];
3250 p += 2;
3251 len -= 2;
3252 }
3253
3254 /*
3255 * No mode subpages supported (yet) but asking for _all_
3256 * subpages may be valid
3257 */
3258 if (spg && (spg != ALL_SUB_MPAGES))
3259 goto invalid_param;
3260 if (pg_len > len)
3261 goto invalid_param_len;
3262
3263 switch (pg) {
3264 case CACHE_MPAGE:
3265 if (ata_mselect_caching(qc, p, pg_len) < 0)
3266 goto invalid_param;
3267 break;
3268
3269 default: /* invalid page code */
3270 goto invalid_param;
3271 }
3272
3273 /*
3274 * Only one page has changeable data, so we only support setting one
3275 * page at a time.
3276 */
3277 if (len > pg_len)
3278 goto invalid_param;
3279
3280 return 0;
3281
3282 invalid_fld:
3283 /* "Invalid field in CDB" */
3284 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3285 return 1;
3286
3287 invalid_param:
3288 /* "Invalid field in parameter list" */
3289 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3290 return 1;
3291
3292 invalid_param_len:
3293 /* "Parameter list length error" */
3294 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3295 return 1;
3296
3297 skip:
3298 scmd->result = SAM_STAT_GOOD;
3299 return 1;
3300}
3301
1da177e4
LT		 3302/**
3303 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3304 * @dev: ATA device
3305 * @cmd: SCSI command opcode to consider
3306 *
3307 * Look up the SCSI command given, and determine whether the
3308 * SCSI command is to be translated or simulated.
3309 *
3310 * RETURNS:
3311 * Pointer to translation function if possible, %NULL if not.
3312 */
3313
3314static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3315{
3316 switch (cmd) {
3317 case READ_6:
3318 case READ_10:
3319 case READ_16:
3320
3321 case WRITE_6:
3322 case WRITE_10:
3323 case WRITE_16:
3324 return ata_scsi_rw_xlat;
3325
0cdd6eb7 3326 case WRITE_SAME_16:
18f0f978
CH		 3327 return ata_scsi_write_same_xlat;
3328
1da177e4
LT		 3329 case SYNCHRONIZE_CACHE:
3330 if (ata_try_flush_cache(dev))
3331 return ata_scsi_flush_xlat;
3332 break;
3333
3334 case VERIFY:
3335 case VERIFY_16:
3336 return ata_scsi_verify_xlat;
b095518e
JG		 3337
3338 case ATA_12:
3339 case ATA_16:
3340 return ata_scsi_pass_thru;
da61396d 3341
1b26d29c
PB		 3342 case MODE_SELECT:
3343 case MODE_SELECT_10:
3344 return ata_scsi_mode_select_xlat;
3345 break;
3346
972dcafb
DG		 3347 case START_STOP:
3348 return ata_scsi_start_stop_xlat;
1da177e4
LT		 3349 }
3350
3351 return NULL;
3352}
3353
3354/**
3355 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3356 * @ap: ATA port to which the command was being sent
3357 * @cmd: SCSI command to dump
3358 *
3359 * Prints the contents of a SCSI command via printk().
3360 */
3361
3362static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3363 struct scsi_cmnd *cmd)
3364{
3365#ifdef ATA_DEBUG
3366 struct scsi_device *scsidev = cmd->device;
3367 u8 *scsicmd = cmd->cmnd;
3368
3369 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 3370 ap->print_id,
1da177e4
LT		 3371 scsidev->channel, scsidev->id, scsidev->lun,
3372 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3373 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3374 scsicmd[8]);
3375#endif
3376}
3377
542b1444 3378static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94 3379 struct ata_device *dev)
eb3f0f9c 3380{
baf4fdfa
ML		 3381 u8 scsi_op = scmd->cmnd[0];
3382 ata_xlat_func_t xlat_func;
2115ea94
TH		 3383 int rc = 0;
3384
eb3f0f9c 3385 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 3386 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3387 goto bad_cdb_len;
eb3f0f9c 3388
baf4fdfa
ML		 3389 xlat_func = ata_get_xlat_func(dev, scsi_op);
3390 } else {
3391 if (unlikely(!scmd->cmd_len))
3392 goto bad_cdb_len;
3393
3394 xlat_func = NULL;
3395 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3396 /* relay SCSI command to ATAPI device */
607126c2
ML		 3397 int len = COMMAND_SIZE(scsi_op);
3398 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3399 goto bad_cdb_len;
3400
3401 xlat_func = atapi_xlat;
3402 } else {
3403 /* ATA_16 passthru, treat as an ATA command */
3404 if (unlikely(scmd->cmd_len > 16))
3405 goto bad_cdb_len;
3406
3407 xlat_func = ata_get_xlat_func(dev, scsi_op);
3408 }
3409 }
3410
3411 if (xlat_func)
b27dcfb0 3412 rc = ata_scsi_translate(dev, scmd, xlat_func);
baf4fdfa 3413 else
b27dcfb0 3414 ata_scsi_simulate(dev, scmd);
2115ea94
TH		 3415
3416 return rc;
baf4fdfa
ML		 3417
3418 bad_cdb_len:
3419 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3420 scmd->cmd_len, scsi_op, dev->cdb_len);
3421 scmd->result = DID_ERROR << 16;
b27dcfb0 3422 scmd->scsi_done(scmd);
baf4fdfa 3423 return 0;
eb3f0f9c
BK		 3424}
3425
1da177e4
LT		 3426/**
3427 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
23e701e6 3428 * @shost: SCSI host of command to be sent
1da177e4 3429 * @cmd: SCSI command to be sent
1da177e4
LT		 3430 *
3431 * In some cases, this function translates SCSI commands into
3432 * ATA taskfiles, and queues the taskfiles to be sent to
3433 * hardware. In other cases, this function simulates a
3434 * SCSI device by evaluating and responding to certain
3435 * SCSI commands. This creates the overall effect of
3436 * ATA and ATAPI devices appearing as SCSI devices.
3437 *
3438 * LOCKING:
23e701e6 3439 * ATA host lock
1da177e4
LT		 3440 *
3441 * RETURNS:
2115ea94
TH		 3442 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3443 * 0 otherwise.
1da177e4 3444 */
23e701e6 3445int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1da177e4
LT		 3446{
3447 struct ata_port *ap;
3448 struct ata_device *dev;
3449 struct scsi_device *scsidev = cmd->device;
2115ea94 3450 int rc = 0;
23e701e6 3451 unsigned long irq_flags;
1da177e4 3452
35bb94b1 3453 ap = ata_shost_to_port(shost);
005a5a06 3454
23e701e6 3455 spin_lock_irqsave(ap->lock, irq_flags);
1da177e4
LT		 3456
3457 ata_scsi_dump_cdb(ap, cmd);
3458
3459 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3460 if (likely(dev))
b27dcfb0 3461 rc = __ata_scsi_queuecmd(cmd, dev);
eb3f0f9c 3462 else {
1da177e4 3463 cmd->result = (DID_BAD_TARGET << 16);
23e701e6 3464 cmd->scsi_done(cmd);
1da177e4
LT		 3465 }
3466
23e701e6
JG		 3467 spin_unlock_irqrestore(ap->lock, irq_flags);
3468
2115ea94 3469 return rc;
1da177e4
LT		 3470}
3471
3472/**
3473 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3474 * @dev: the target device
1da177e4 3475 * @cmd: SCSI command being sent to device.
1da177e4
LT		 3476 *
3477 * Interprets and directly executes a select list of SCSI commands
3478 * that can be handled internally.
3479 *
3480 * LOCKING:
cca3974e 3481 * spin_lock_irqsave(host lock)
1da177e4
LT		 3482 */
3483
b27dcfb0 3484void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
1da177e4
LT		 3485{
3486 struct ata_scsi_args args;
057ace5e 3487 const u8 *scsicmd = cmd->cmnd;
45394145 3488 u8 tmp8;
1da177e4 3489
9a3dccc4
TH		 3490 args.dev = dev;
3491 args.id = dev->id;
1da177e4 3492 args.cmd = cmd;
b27dcfb0 3493 args.done = cmd->scsi_done;
1da177e4
LT		 3494
3495 switch(scsicmd[0]) {
2dcb407e
JG		 3496 /* TODO: worth improving? */
3497 case FORMAT_UNIT:
b27dcfb0 3498 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3499 break;
3500
3501 case INQUIRY:
3502 if (scsicmd[1] & 2) /* is CmdDt set? */
b27dcfb0 3503 ata_scsi_invalid_field(cmd);
2dcb407e
JG		 3504 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3505 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3506 else switch (scsicmd[2]) {
3507 case 0x00:
3508 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3509 break;
2dcb407e
JG		 3510 case 0x80:
3511 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3512 break;
2dcb407e
JG		 3513 case 0x83:
3514 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3515 break;
2dcb407e
JG		 3516 case 0x89:
3517 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3518 break;
18f0f978
CH		 3519 case 0xb0:
3520 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3521 break;
1e9dbc92
MW		 3522 case 0xb1:
3523 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3524 break;
02e0a604
MP		 3525 case 0xb2:
3526 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3527 break;
2dcb407e 3528 default:
b27dcfb0 3529 ata_scsi_invalid_field(cmd);
1da177e4 3530 break;
2dcb407e
JG		 3531 }
3532 break;
3533
3534 case MODE_SENSE:
3535 case MODE_SENSE_10:
3536 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3537 break;
3538
2dcb407e
JG		 3539 case READ_CAPACITY:
3540 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3541 break;
3542
3543 case SERVICE_ACTION_IN:
3544 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3545 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e 3546 else
b27dcfb0 3547 ata_scsi_invalid_field(cmd);
2dcb407e 3548 break;
1da177e4 3549
2dcb407e
JG		 3550 case REPORT_LUNS:
3551 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3552 break;
1da177e4 3553
2dcb407e
JG		 3554 case REQUEST_SENSE:
3555 ata_scsi_set_sense(cmd, 0, 0, 0);
3556 cmd->result = (DRIVER_SENSE << 24);
b27dcfb0 3557 cmd->scsi_done(cmd);
2dcb407e 3558 break;
1da177e4 3559
2dcb407e
JG		 3560 /* if we reach this, then writeback caching is disabled,
3561 * turning this into a no-op.
3562 */
3563 case SYNCHRONIZE_CACHE:
3564 /* fall through */
3565
3566 /* no-op's, complete with success */
3567 case REZERO_UNIT:
3568 case SEEK_6:
3569 case SEEK_10:
3570 case TEST_UNIT_READY:
3571 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3572 break;
45394145 3573
2dcb407e
JG		 3574 case SEND_DIAGNOSTIC:
3575 tmp8 = scsicmd[1] & ~(1 << 3);
3576 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3577 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e 3578 else
b27dcfb0 3579 ata_scsi_invalid_field(cmd);
2dcb407e 3580 break;
1da177e4 3581
2dcb407e
JG		 3582 /* all other commands */
3583 default:
3584 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3585 /* "Invalid command operation code" */
b27dcfb0 3586 cmd->scsi_done(cmd);
2dcb407e 3587 break;
1da177e4
LT		 3588 }
3589}
3590
f3187195
TH		 3591int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3592{
3593 int i, rc;
3594
3595 for (i = 0; i < host->n_ports; i++) {
3596 struct ata_port *ap = host->ports[i];
3597 struct Scsi_Host *shost;
3598
3599 rc = -ENOMEM;
3600 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3601 if (!shost)
3602 goto err_alloc;
3603
9ee4f393 3604 shost->eh_noresume = 1;
f3187195
TH		 3605 *(struct ata_port **)&shost->hostdata[0] = ap;
3606 ap->scsi_host = shost;
3607
d9027470 3608 shost->transportt = ata_scsi_transport_template;
f3187195
TH		 3609 shost->unique_id = ap->print_id;
3610 shost->max_id = 16;
3611 shost->max_lun = 1;
3612 shost->max_channel = 1;
3613 shost->max_cmd_len = 16;
3614
31cc23b3
TH		 3615 /* Schedule policy is determined by ->qc_defer()
3616 * callback and it needs to see every deferred qc.
3617 * Set host_blocked to 1 to prevent SCSI midlayer from
3618 * automatically deferring requests.
3619 */
3620 shost->max_host_blocked = 1;
3621
f8fc75dc
LM		 3622 rc = scsi_add_host_with_dma(ap->scsi_host,
3623 &ap->tdev, ap->host->dev);
f3187195
TH		 3624 if (rc)
3625 goto err_add;
3626 }
3627
3628 return 0;
3629
3630 err_add:
3631 scsi_host_put(host->ports[i]->scsi_host);
3632 err_alloc:
3633 while (--i >= 0) {
3634 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3635
3636 scsi_remove_host(shost);
3637 scsi_host_put(shost);
3638 }
3639 return rc;
3640}
3641
1ae46317 3642void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3643{
1ae46317
TH		 3644 int tries = 5;
3645 struct ata_device *last_failed_dev = NULL;
41bda9c9 3646 struct ata_link *link;
1ae46317 3647 struct ata_device *dev;
644dd0cc 3648
1ae46317 3649 repeat:
1eca4365
TH		 3650 ata_for_each_link(link, ap, EDGE) {
3651 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3652 struct scsi_device *sdev;
3653 int channel = 0, id = 0;
3edebac4 3654
1eca4365 3655 if (dev->sdev)
41bda9c9 3656 continue;
3f19ee8c 3657
41bda9c9
TH		 3658 if (ata_is_host_link(link))
3659 id = dev->devno;
3660 else
3661 channel = link->pmp;
3662
3663 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3664 NULL);
3665 if (!IS_ERR(sdev)) {
3666 dev->sdev = sdev;
3667 scsi_device_put(sdev);
7381fe73
AL		 3668 if (zpodd_dev_enabled(dev))
3669 dev_pm_qos_expose_flags(
3670 &sdev->sdev_gendev, 0);
295124dc
GG		 3671 } else {
3672 dev->sdev = NULL;
41bda9c9 3673 }
3edebac4 3674 }
3f19ee8c 3675 }
1ae46317
TH		 3676
3677 /* If we scanned while EH was in progress or allocation
3678 * failure occurred, scan would have failed silently. Check
3679 * whether all devices are attached.
3680 */
1eca4365
TH		 3681 ata_for_each_link(link, ap, EDGE) {
3682 ata_for_each_dev(dev, link, ENABLED) {
3683 if (!dev->sdev)
41bda9c9
TH		 3684 goto exit_loop;
3685 }
1ae46317 3686 }
41bda9c9
TH		 3687 exit_loop:
3688 if (!link)
1ae46317
TH		 3689 return;
3690
3691 /* we're missing some SCSI devices */
3692 if (sync) {
3693 /* If caller requested synchrnous scan && we've made
3694 * any progress, sleep briefly and repeat.
3695 */
3696 if (dev != last_failed_dev) {
3697 msleep(100);
3698 last_failed_dev = dev;
3699 goto repeat;
3700 }
3701
3702 /* We might be failing to detect boot device, give it
3703 * a few more chances.
3704 */
3705 if (--tries) {
3706 msleep(100);
3707 goto repeat;
3708 }
3709
a9a79dfe
JP		 3710 ata_port_err(ap,
3711 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
1ae46317
TH		 3712 }
3713
ad72cf98 3714 queue_delayed_work(system_long_wq, &ap->hotplug_task,
1ae46317 3715 round_jiffies_relative(HZ));
644dd0cc 3716}
0ea035a3
TH		 3717
3718/**
3719 * ata_scsi_offline_dev - offline attached SCSI device
3720 * @dev: ATA device to offline attached SCSI device for
3721 *
3722 * This function is called from ata_eh_hotplug() and responsible
3723 * for taking the SCSI device attached to @dev offline. This
cca3974e 3724 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3725 * against clearing.
3726 *
3727 * LOCKING:
cca3974e 3728 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3729 *
3730 * RETURNS:
3731 * 1 if attached SCSI device exists, 0 otherwise.
3732 */
3733int ata_scsi_offline_dev(struct ata_device *dev)
3734{
3735 if (dev->sdev) {
3736 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3737 return 1;
3738 }
3739 return 0;
3740}
580b2102
TH		 3741
3742/**
3743 * ata_scsi_remove_dev - remove attached SCSI device
3744 * @dev: ATA device to remove attached SCSI device for
3745 *
3746 * This function is called from ata_eh_scsi_hotplug() and
3747 * responsible for removing the SCSI device attached to @dev.
3748 *
3749 * LOCKING:
3750 * Kernel thread context (may sleep).
3751 */
3752static void ata_scsi_remove_dev(struct ata_device *dev)
3753{
9af5c9c9 3754 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3755 struct scsi_device *sdev;
3756 unsigned long flags;
3757
3758 /* Alas, we need to grab scan_mutex to ensure SCSI device
3759 * state doesn't change underneath us and thus
3760 * scsi_device_get() always succeeds. The mutex locking can
3761 * be removed if there is __scsi_device_get() interface which
3762 * increments reference counts regardless of device state.
3763 */
cca3974e 3764 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3765 spin_lock_irqsave(ap->lock, flags);
580b2102 3766
afe75951
AL		 3767 if (zpodd_dev_enabled(dev))
3768 zpodd_exit(dev);
3bd46600 3769
cca3974e 3770 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3771 sdev = dev->sdev;
3772 dev->sdev = NULL;
3773
3774 if (sdev) {
3775 /* If user initiated unplug races with us, sdev can go
cca3974e 3776 * away underneath us after the host lock and
580b2102
TH		 3777 * scan_mutex are released. Hold onto it.
3778 */
3779 if (scsi_device_get(sdev) == 0) {
3780 /* The following ensures the attached sdev is
3781 * offline on return from ata_scsi_offline_dev()
3782 * regardless it wins or loses the race
3783 * against this function.
3784 */
3785 scsi_device_set_state(sdev, SDEV_OFFLINE);
3786 } else {
3787 WARN_ON(1);
3788 sdev = NULL;
3789 }
3790 }
3791
ba6a1308 3792 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3793 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3794
3795 if (sdev) {
a9a79dfe
JP		 3796 ata_dev_info(dev, "detaching (SCSI %s)\n",
3797 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3798
3799 scsi_remove_device(sdev);
3800 scsi_device_put(sdev);
3801 }
3802}
3803
41bda9c9
TH		 3804static void ata_scsi_handle_link_detach(struct ata_link *link)
3805{
3806 struct ata_port *ap = link->ap;
3807 struct ata_device *dev;
3808
1eca4365 3809 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3810 unsigned long flags;
3811
3812 if (!(dev->flags & ATA_DFLAG_DETACHED))
3813 continue;
3814
3815 spin_lock_irqsave(ap->lock, flags);
3816 dev->flags &= ~ATA_DFLAG_DETACHED;
3817 spin_unlock_irqrestore(ap->lock, flags);
3818
3819 ata_scsi_remove_dev(dev);
3820 }
3821}
3822
2f294968
KCA		 3823/**
3824 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3825 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3826 *
3827 * Tell the block layer to send a media change notification
3828 * event.
3829 *
3830 * LOCKING:
854c73a2 3831 * spin_lock_irqsave(host lock)
2f294968 3832 */
854c73a2 3833void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3834{
854c73a2 3835 if (dev->sdev)
f26792d5
JG		 3836 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3837 GFP_ATOMIC);
2f294968 3838}
2f294968 3839
580b2102
TH		 3840/**
3841 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3842 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3843 *
3844 * Perform SCSI part of hotplug. It's executed from a separate
3845 * workqueue after EH completes. This is necessary because SCSI
3846 * hot plugging requires working EH and hot unplugging is
3847 * synchronized with hot plugging with a mutex.
3848 *
3849 * LOCKING:
3850 * Kernel thread context (may sleep).
3851 */
65f27f38 3852void ata_scsi_hotplug(struct work_struct *work)
580b2102 3853{
65f27f38
DH		 3854 struct ata_port *ap =
3855 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3856 int i;
580b2102 3857
b51e9e5d 3858 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3859 DPRINTK("ENTER/EXIT - unloading\n");
3860 return;
3861 }
3862
3863 DPRINTK("ENTER\n");
ad72cf98 3864 mutex_lock(&ap->scsi_scan_mutex);
580b2102 3865
41bda9c9
TH		 3866 /* Unplug detached devices. We cannot use link iterator here
3867 * because PMP links have to be scanned even if PMP is
3868 * currently not attached. Iterate manually.
3869 */
3870 ata_scsi_handle_link_detach(&ap->link);
3871 if (ap->pmp_link)
3872 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3873 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3874
3875 /* scan for new ones */
1ae46317 3876 ata_scsi_scan_host(ap, 0);
580b2102 3877
ad72cf98 3878 mutex_unlock(&ap->scsi_scan_mutex);
580b2102
TH		 3879 DPRINTK("EXIT\n");
3880}
83c47bcb
TH		 3881
3882/**
3883 * ata_scsi_user_scan - indication for user-initiated bus scan
3884 * @shost: SCSI host to scan
3885 * @channel: Channel to scan
3886 * @id: ID to scan
3887 * @lun: LUN to scan
3888 *
3889 * This function is called when user explicitly requests bus
3890 * scan. Set probe pending flag and invoke EH.
3891 *
3892 * LOCKING:
3893 * SCSI layer (we don't care)
3894 *
3895 * RETURNS:
3896 * Zero.
3897 */
d9027470
GG		 3898int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3899 unsigned int id, unsigned int lun)
83c47bcb
TH		 3900{
3901 struct ata_port *ap = ata_shost_to_port(shost);
3902 unsigned long flags;
41bda9c9 3903 int devno, rc = 0;
83c47bcb
TH		 3904
3905 if (!ap->ops->error_handler)
3906 return -EOPNOTSUPP;
3907
41bda9c9 3908 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3909 return -EINVAL;
3910
071f44b1 3911 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3912 if (channel != SCAN_WILD_CARD && channel)
3913 return -EINVAL;
3914 devno = id;
3915 } else {
3916 if (id != SCAN_WILD_CARD && id)
3917 return -EINVAL;
3918 devno = channel;
3919 }
3920
ba6a1308 3921 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3922
41bda9c9
TH		 3923 if (devno == SCAN_WILD_CARD) {
3924 struct ata_link *link;
3925
1eca4365 3926 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3927 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3928 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3929 ehi->action |= ATA_EH_RESET;
41bda9c9 3930 }
83c47bcb 3931 } else {
41bda9c9 3932 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3933
3934 if (dev) {
41bda9c9 3935 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3936 ehi->probe_mask |= 1 << dev->devno;
cf480626 3937 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3938 } else
3939 rc = -EINVAL;
3940 }
3941
309afcb5 3942 if (rc == 0) {
83c47bcb 3943 ata_port_schedule_eh(ap);
309afcb5
TH		 3944 spin_unlock_irqrestore(ap->lock, flags);
3945 ata_port_wait_eh(ap);
3946 } else
3947 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3948
3949 return rc;
3950}
3057ac3c 3951
3952/**
d0171269 3953 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3954 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3955 *
d0171269 3956 * After ATA pass thru (SAT) commands are executed successfully,
ad72cf98 3957 * libata need to propagate the changes to SCSI layer.
3057ac3c 3958 *
d0171269
TH		 3959 * LOCKING:
3960 * Kernel thread context (may sleep).
3057ac3c 3961 */
65f27f38 3962void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3963{
65f27f38
DH		 3964 struct ata_port *ap =
3965 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3966 struct ata_link *link;
f58229f8 3967 struct ata_device *dev;
f84e7e41 3968 unsigned long flags;
3057ac3c 3969
ad72cf98 3970 mutex_lock(&ap->scsi_scan_mutex);
f84e7e41
TH		 3971 spin_lock_irqsave(ap->lock, flags);
3972
1eca4365
TH		 3973 ata_for_each_link(link, ap, EDGE) {
3974 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3975 struct scsi_device *sdev = dev->sdev;
3057ac3c 3976
1eca4365 3977 if (!sdev)
41bda9c9
TH		 3978 continue;
3979 if (scsi_device_get(sdev))
3980 continue;
f84e7e41 3981
41bda9c9
TH		 3982 spin_unlock_irqrestore(ap->lock, flags);
3983 scsi_rescan_device(&(sdev->sdev_gendev));
3984 scsi_device_put(sdev);
3985 spin_lock_irqsave(ap->lock, flags);
3986 }
3057ac3c 3987 }
f84e7e41
TH		 3988
3989 spin_unlock_irqrestore(ap->lock, flags);
ad72cf98 3990 mutex_unlock(&ap->scsi_scan_mutex);
3057ac3c 3991}
80289167
BK		 3992
3993/**
3994 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3995 * @host: ATA host container for all SAS ports
80289167 3996 * @port_info: Information from low-level host driver
cca3974e 3997 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3998 *
3999 * LOCKING:
4000 * PCI/etc. bus probe sem.
4001 *
4002 * RETURNS:
4003 * ata_port pointer on success / NULL on failure.
4004 */
4005
cca3974e 4006struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 4007 struct ata_port_info *port_info,
cca3974e 4008 struct Scsi_Host *shost)
80289167 4009{
f3187195 4010 struct ata_port *ap;
80289167 4011
f3187195 4012 ap = ata_port_alloc(host);
80289167
BK		 4013 if (!ap)
4014 return NULL;
4015
f3187195 4016 ap->port_no = 0;
a29b5dad 4017 ap->lock = &host->lock;
f3187195
TH		 4018 ap->pio_mask = port_info->pio_mask;
4019 ap->mwdma_mask = port_info->mwdma_mask;
4020 ap->udma_mask = port_info->udma_mask;
4021 ap->flags |= port_info->flags;
4022 ap->ops = port_info->port_ops;
4023 ap->cbl = ATA_CBL_SATA;
4024
80289167
BK		 4025 return ap;
4026}
4027EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4028
4029/**
4030 * ata_sas_port_start - Set port up for dma.
4031 * @ap: Port to initialize
4032 *
4033 * Called just after data structures for each port are
dde20207 4034 * initialized.
80289167
BK		 4035 *
4036 * May be used as the port_start() entry in ata_port_operations.
4037 *
4038 * LOCKING:
4039 * Inherited from caller.
4040 */
4041int ata_sas_port_start(struct ata_port *ap)
4042{
3f1e046a
NA		 4043 /*
4044 * the port is marked as frozen at allocation time, but if we don't
4045 * have new eh, we won't thaw it
4046 */
4047 if (!ap->ops->error_handler)
4048 ap->pflags &= ~ATA_PFLAG_FROZEN;
dde20207 4049 return 0;
80289167
BK		 4050}
4051EXPORT_SYMBOL_GPL(ata_sas_port_start);
4052
4053/**
4054 * ata_port_stop - Undo ata_sas_port_start()
4055 * @ap: Port to shut down
4056 *
80289167
BK		 4057 * May be used as the port_stop() entry in ata_port_operations.
4058 *
4059 * LOCKING:
4060 * Inherited from caller.
4061 */
4062
4063void ata_sas_port_stop(struct ata_port *ap)
4064{
80289167
BK		 4065}
4066EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4067
b2024459
DW		 4068/**
4069 * ata_sas_async_probe - simply schedule probing and return
4070 * @ap: Port to probe
4071 *
4072 * For batch scheduling of probe for sas attached ata devices, assumes
4073 * the port has already been through ata_sas_port_init()
4074 */
4075void ata_sas_async_probe(struct ata_port *ap)
9508a66f 4076{
b2024459
DW		 4077 __ata_port_probe(ap);
4078}
4079EXPORT_SYMBOL_GPL(ata_sas_async_probe);
9508a66f 4080
b2024459
DW		 4081int ata_sas_sync_probe(struct ata_port *ap)
4082{
4083 return ata_port_probe(ap);
9508a66f 4084}
b2024459
DW		 4085EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4086
9508a66f 4087
80289167
BK		 4088/**
4089 * ata_sas_port_init - Initialize a SATA device
4090 * @ap: SATA port to initialize
4091 *
4092 * LOCKING:
4093 * PCI/etc. bus probe sem.
4094 *
4095 * RETURNS:
4096 * Zero on success, non-zero on error.
4097 */
4098
4099int ata_sas_port_init(struct ata_port *ap)
4100{
4101 int rc = ap->ops->port_start(ap);
4102
b2024459
DW		 4103 if (rc)
4104 return rc;
4105 ap->print_id = atomic_inc_return(&ata_print_id);
4106 return 0;
80289167
BK		 4107}
4108EXPORT_SYMBOL_GPL(ata_sas_port_init);
4109
4110/**
4111 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4112 * @ap: SATA port to destroy
4113 *
4114 */
4115
4116void ata_sas_port_destroy(struct ata_port *ap)
4117{
f0d36efd
TH		 4118 if (ap->ops->port_stop)
4119 ap->ops->port_stop(ap);
80289167
BK		 4120 kfree(ap);
4121}
4122EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4123
4124/**
4125 * ata_sas_slave_configure - Default slave_config routine for libata devices
4126 * @sdev: SCSI device to configure
4127 * @ap: ATA port to which SCSI device is attached
4128 *
4129 * RETURNS:
4130 * Zero.
4131 */
4132
4133int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4134{
4135 ata_scsi_sdev_config(sdev);
9af5c9c9 4136 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 4137 return 0;
4138}
4139EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4140
4141/**
4142 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4143 * @cmd: SCSI command to be sent
80289167
BK		 4144 * @ap: ATA port to which the command is being sent
4145 *
4146 * RETURNS:
08475a19
BK		 4147 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4148 * 0 otherwise.
80289167
BK		 4149 */
4150
b27dcfb0 4151int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
80289167 4152{
08475a19
BK		 4153 int rc = 0;
4154
80289167
BK		 4155 ata_scsi_dump_cdb(ap, cmd);
4156
2486fa56 4157 if (likely(ata_dev_enabled(ap->link.device)))
b27dcfb0 4158 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
80289167
BK		 4159 else {
4160 cmd->result = (DID_BAD_TARGET << 16);
b27dcfb0 4161 cmd->scsi_done(cmd);
80289167 4162 }
08475a19 4163 return rc;
80289167
BK		 4164}
4165EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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