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DMI: Introduce dmi_first_match to make the interface more flexible
[deliverable/linux.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
1da177e4 40#include <scsi/scsi_host.h>
beb40487 41#include <scsi/scsi_cmnd.h>
85837ebd 42#include <scsi/scsi_eh.h>
005a5a06 43#include <scsi/scsi_device.h>
a6e6ce8e 44#include <scsi/scsi_tcq.h>
30afc84c 45#include <scsi/scsi_transport.h>
1da177e4 46#include <linux/libata.h>
b095518e 47#include <linux/hdreg.h>
2dcb407e 48#include <linux/uaccess.h>
1da177e4
LT		 49
50#include "libata.h"
51
87340e98
TH		 52#define SECTOR_SIZE 512
53#define ATA_SCSI_RBUF_SIZE 4096
54
55static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
56static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 57
ad706991 58typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 59
2dcb407e 60static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 61 const struct scsi_device *scsidev);
2dcb407e 62static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 63 const struct scsi_device *scsidev);
83c47bcb
TH		 64static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
65 unsigned int id, unsigned int lun);
ab5b3a5b 66
1da177e4 67
00ac37f5
DG		 68#define RW_RECOVERY_MPAGE 0x1
69#define RW_RECOVERY_MPAGE_LEN 12
70#define CACHE_MPAGE 0x8
71#define CACHE_MPAGE_LEN 20
72#define CONTROL_MPAGE 0xa
73#define CONTROL_MPAGE_LEN 12
74#define ALL_MPAGES 0x3f
75#define ALL_SUB_MPAGES 0xff
76
77
24f75686 78static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 79 RW_RECOVERY_MPAGE,
80 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 81 (1 << 7), /* AWRE */
00ac37f5
DG		 82 0, /* read retry count */
83 0, 0, 0, 0,
84 0, /* write retry count */
85 0, 0, 0
86};
87
88static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
89 CACHE_MPAGE,
90 CACHE_MPAGE_LEN - 2,
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0
95};
96
97static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
98 CONTROL_MPAGE,
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
104};
105
30afc84c
TH		 106/*
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
109 */
f3187195 110static struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 111 .eh_strategy_handler = ata_scsi_error,
30afc84c 112 .eh_timed_out = ata_scsi_timed_out,
ccf68c34 113 .user_scan = ata_scsi_user_scan,
30afc84c
TH		 114};
115
1da177e4 116
ca77329f
KCA		 117static const struct {
118 enum link_pm value;
119 const char *name;
120} link_pm_policy[] = {
121 { NOT_AVAILABLE, "max_performance" },
122 { MIN_POWER, "min_power" },
123 { MAX_PERFORMANCE, "max_performance" },
124 { MEDIUM_POWER, "medium_power" },
125};
126
a2d6ed14 127static const char *ata_scsi_lpm_get(enum link_pm policy)
ca77329f
KCA		 128{
129 int i;
130
131 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
132 if (link_pm_policy[i].value == policy)
133 return link_pm_policy[i].name;
134
135 return NULL;
136}
137
ee959b00
TJ		 138static ssize_t ata_scsi_lpm_put(struct device *dev,
139 struct device_attribute *attr,
140 const char *buf, size_t count)
ca77329f 141{
ee959b00 142 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f
KCA		 143 struct ata_port *ap = ata_shost_to_port(shost);
144 enum link_pm policy = 0;
145 int i;
146
147 /*
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
153 */
154 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
155 const int len = strlen(link_pm_policy[i].name);
156 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
157 buf[len] == '\n') {
158 policy = link_pm_policy[i].value;
159 break;
160 }
161 }
162 if (!policy)
163 return -EINVAL;
164
165 ata_lpm_schedule(ap, policy);
166 return count;
167}
168
169static ssize_t
ee959b00 170ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
ca77329f 171{
ee959b00 172 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f
KCA		 173 struct ata_port *ap = ata_shost_to_port(shost);
174 const char *policy =
175 ata_scsi_lpm_get(ap->pm_policy);
176
177 if (!policy)
178 return -EINVAL;
179
180 return snprintf(buf, 23, "%s\n", policy);
181}
ee959b00 182DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
ca77329f 183 ata_scsi_lpm_show, ata_scsi_lpm_put);
ee959b00 184EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 185
45fabbb7
EO		 186static ssize_t ata_scsi_park_show(struct device *device,
187 struct device_attribute *attr, char *buf)
188{
189 struct scsi_device *sdev = to_scsi_device(device);
190 struct ata_port *ap;
191 struct ata_link *link;
192 struct ata_device *dev;
a464189d 193 unsigned long flags, now;
45fabbb7
EO		 194 unsigned int uninitialized_var(msecs);
195 int rc = 0;
196
197 ap = ata_shost_to_port(sdev->host);
198
199 spin_lock_irqsave(ap->lock, flags);
200 dev = ata_scsi_find_dev(ap, sdev);
201 if (!dev) {
202 rc = -ENODEV;
203 goto unlock;
204 }
205 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
206 rc = -EOPNOTSUPP;
207 goto unlock;
208 }
209
210 link = dev->link;
a464189d 211 now = jiffies;
45fabbb7
EO		 212 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
213 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 214 time_after(dev->unpark_deadline, now))
215 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 216 else
217 msecs = 0;
218
219unlock:
220 spin_unlock_irq(ap->lock);
221
222 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
223}
224
225static ssize_t ata_scsi_park_store(struct device *device,
226 struct device_attribute *attr,
227 const char *buf, size_t len)
228{
229 struct scsi_device *sdev = to_scsi_device(device);
230 struct ata_port *ap;
231 struct ata_device *dev;
232 long int input;
233 unsigned long flags;
234 int rc;
235
236 rc = strict_strtol(buf, 10, &input);
237 if (rc || input < -2)
238 return -EINVAL;
239 if (input > ATA_TMOUT_MAX_PARK) {
240 rc = -EOVERFLOW;
241 input = ATA_TMOUT_MAX_PARK;
242 }
243
244 ap = ata_shost_to_port(sdev->host);
245
246 spin_lock_irqsave(ap->lock, flags);
247 dev = ata_scsi_find_dev(ap, sdev);
248 if (unlikely(!dev)) {
249 rc = -ENODEV;
250 goto unlock;
251 }
252 if (dev->class != ATA_DEV_ATA) {
253 rc = -EOPNOTSUPP;
254 goto unlock;
255 }
256
257 if (input >= 0) {
258 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
259 rc = -EOPNOTSUPP;
260 goto unlock;
261 }
262
263 dev->unpark_deadline = ata_deadline(jiffies, input);
264 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
265 ata_port_schedule_eh(ap);
266 complete(&ap->park_req_pending);
267 } else {
268 switch (input) {
269 case -1:
270 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
271 break;
272 case -2:
273 dev->flags |= ATA_DFLAG_NO_UNLOAD;
274 break;
275 }
276 }
277unlock:
278 spin_unlock_irqrestore(ap->lock, flags);
279
280 return rc ? rc : len;
281}
282DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
283 ata_scsi_park_show, ata_scsi_park_store);
284EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
285
f0761be3
TH		 286static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
287{
288 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
289
290 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
291}
292
18f7ba4c
KCA		 293static ssize_t
294ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
295 const char *buf, size_t count)
296{
297 struct Scsi_Host *shost = class_to_shost(dev);
298 struct ata_port *ap = ata_shost_to_port(shost);
299 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
300 return ap->ops->em_store(ap, buf, count);
301 return -EINVAL;
302}
303
304static ssize_t
305ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
306 char *buf)
307{
308 struct Scsi_Host *shost = class_to_shost(dev);
309 struct ata_port *ap = ata_shost_to_port(shost);
310
311 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
312 return ap->ops->em_show(ap, buf);
313 return -EINVAL;
314}
315DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
316 ata_scsi_em_message_show, ata_scsi_em_message_store);
317EXPORT_SYMBOL_GPL(dev_attr_em_message);
318
319static ssize_t
320ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
321 char *buf)
322{
323 struct Scsi_Host *shost = class_to_shost(dev);
324 struct ata_port *ap = ata_shost_to_port(shost);
325
326 return snprintf(buf, 23, "%d\n", ap->em_message_type);
327}
328DEVICE_ATTR(em_message_type, S_IRUGO,
329 ata_scsi_em_message_type_show, NULL);
330EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
331
332static ssize_t
333ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
334 char *buf)
335{
336 struct scsi_device *sdev = to_scsi_device(dev);
337 struct ata_port *ap = ata_shost_to_port(sdev->host);
338 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
339
340 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
341 return ap->ops->sw_activity_show(atadev, buf);
342 return -EINVAL;
343}
344
345static ssize_t
346ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
347 const char *buf, size_t count)
348{
349 struct scsi_device *sdev = to_scsi_device(dev);
350 struct ata_port *ap = ata_shost_to_port(sdev->host);
351 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
352 enum sw_activity val;
353 int rc;
354
355 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
356 val = simple_strtoul(buf, NULL, 0);
357 switch (val) {
358 case OFF: case BLINK_ON: case BLINK_OFF:
359 rc = ap->ops->sw_activity_store(atadev, val);
360 if (!rc)
361 return count;
362 else
363 return rc;
364 }
365 }
366 return -EINVAL;
367}
368DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
369 ata_scsi_activity_store);
370EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
371
45fabbb7
EO		 372struct device_attribute *ata_common_sdev_attrs[] = {
373 &dev_attr_unload_heads,
374 NULL
375};
376EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
377
ae006510
DG		 378static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
379 void (*done)(struct scsi_cmnd *))
380{
381 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
382 /* "Invalid field in cbd" */
383 done(cmd);
384}
385
1da177e4
LT		 386/**
387 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
388 * @sdev: SCSI device for which BIOS geometry is to be determined
389 * @bdev: block device associated with @sdev
390 * @capacity: capacity of SCSI device
391 * @geom: location to which geometry will be output
392 *
393 * Generic bios head/sector/cylinder calculator
394 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
395 * mapping. Some situations may arise where the disk is not
396 * bootable if this is not used.
397 *
398 * LOCKING:
399 * Defined by the SCSI layer. We don't really care.
400 *
401 * RETURNS:
402 * Zero.
403 */
404int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
405 sector_t capacity, int geom[])
406{
407 geom[0] = 255;
408 geom[1] = 63;
409 sector_div(capacity, 255*63);
410 geom[2] = capacity;
411
412 return 0;
413}
414
5924b74c
TH		 415/**
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
417 * @sdev: SCSI device to get identify data for
418 * @arg: User buffer area for identify data
419 *
420 * LOCKING:
421 * Defined by the SCSI layer. We don't really care.
422 *
423 * RETURNS:
424 * Zero on success, negative errno on error.
425 */
94be9a58
JG		 426static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
427 void __user *arg)
5924b74c 428{
5924b74c
TH		 429 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
430 u16 __user *dst = arg;
431 char buf[40];
432
433 if (!dev)
434 return -ENOMSG;
435
436 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
437 return -EFAULT;
438
439 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
440 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
441 return -EFAULT;
442
443 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
444 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
445 return -EFAULT;
446
447 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
448 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
449 return -EFAULT;
450
451 return 0;
452}
453
b095518e
JG		 454/**
455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 456 * @scsidev: Device to which we are issuing command
b095518e
JG		 457 * @arg: User provided data for issuing command
458 *
459 * LOCKING:
460 * Defined by the SCSI layer. We don't really care.
461 *
462 * RETURNS:
463 * Zero on success, negative errno on error.
464 */
b095518e
JG		 465int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
466{
467 int rc = 0;
468 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 469 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 470 int argsize = 0;
85837ebd 471 enum dma_data_direction data_dir;
bbe1fe7e 472 int cmd_result;
b095518e 473
c893a3ae 474 if (arg == NULL)
b095518e
JG		 475 return -EINVAL;
476
477 if (copy_from_user(args, arg, sizeof(args)))
478 return -EFAULT;
479
bbe1fe7e
ET		 480 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
481 if (!sensebuf)
482 return -ENOMEM;
483
b095518e
JG		 484 memset(scsi_cmd, 0, sizeof(scsi_cmd));
485
486 if (args[3]) {
487 argsize = SECTOR_SIZE * args[3];
488 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 489 if (argbuf == NULL) {
490 rc = -ENOMEM;
491 goto error;
492 }
b095518e
JG		 493
494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 496 block count in sector count field */
85837ebd 497 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 498 } else {
499 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 500 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 501 data_dir = DMA_NONE;
b095518e
JG		 502 }
503
504 scsi_cmd[0] = ATA_16;
505
506 scsi_cmd[4] = args[2];
a4f19040 507 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 508 scsi_cmd[6] = args[3];
509 scsi_cmd[8] = args[1];
510 scsi_cmd[10] = 0x4f;
511 scsi_cmd[12] = 0xc2;
512 } else {
513 scsi_cmd[6] = args[1];
514 }
515 scsi_cmd[14] = args[0];
516
517 /* Good values for timeout and retries? Values below
518 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 519 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 520 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 521
522 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
523 u8 *desc = sensebuf + 8;
524 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
525
526 /* If we set cc then ATA pass-through will cause a
527 * check condition even if no error. Filter that. */
528 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
529 struct scsi_sense_hdr sshdr;
530 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e
JG		 531 &sshdr);
532 if (sshdr.sense_key == 0 &&
533 sshdr.asc == 0 && sshdr.ascq == 0)
bbe1fe7e
ET		 534 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
535 }
536
537 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
539 desc[0] == 0x09) { /* code is "ATA Descriptor" */
540 args[0] = desc[13]; /* status */
541 args[1] = desc[3]; /* error */
542 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 543 if (copy_to_user(arg, args, sizeof(args)))
544 rc = -EFAULT;
545 }
546 }
547
548
549 if (cmd_result) {
b095518e
JG		 550 rc = -EIO;
551 goto error;
552 }
553
b095518e 554 if ((argbuf)
c893a3ae 555 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 556 rc = -EFAULT;
557error:
bbe1fe7e 558 kfree(sensebuf);
8f760780 559 kfree(argbuf);
b095518e
JG		 560 return rc;
561}
562
563/**
564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 565 * @scsidev: Device to which we are issuing command
b095518e
JG		 566 * @arg: User provided data for issuing command
567 *
568 * LOCKING:
569 * Defined by the SCSI layer. We don't really care.
570 *
571 * RETURNS:
572 * Zero on success, negative errno on error.
573 */
574int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
575{
576 int rc = 0;
577 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 578 u8 args[7], *sensebuf = NULL;
579 int cmd_result;
b095518e 580
c893a3ae 581 if (arg == NULL)
b095518e
JG		 582 return -EINVAL;
583
584 if (copy_from_user(args, arg, sizeof(args)))
585 return -EFAULT;
586
af068bd1
DM		 587 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
588 if (!sensebuf)
589 return -ENOMEM;
590
b095518e
JG		 591 memset(scsi_cmd, 0, sizeof(scsi_cmd));
592 scsi_cmd[0] = ATA_16;
593 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 595 scsi_cmd[4] = args[1];
596 scsi_cmd[6] = args[2];
597 scsi_cmd[8] = args[3];
598 scsi_cmd[10] = args[4];
599 scsi_cmd[12] = args[5];
277239f2 600 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 601 scsi_cmd[14] = args[0];
602
b095518e 603 /* Good values for timeout and retries? Values below
2e9edbf8 604 from scsi_ioctl_send_command() for default case... */
af068bd1 605 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 606 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 607
608 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
609 u8 *desc = sensebuf + 8;
610 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
611
612 /* If we set cc then ATA pass-through will cause a
613 * check condition even if no error. Filter that. */
614 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
615 struct scsi_sense_hdr sshdr;
616 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
617 &sshdr);
2dcb407e
JG		 618 if (sshdr.sense_key == 0 &&
619 sshdr.asc == 0 && sshdr.ascq == 0)
af068bd1
DM		 620 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
621 }
622
623 /* Send userspace ATA registers */
624 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
625 desc[0] == 0x09) {/* code is "ATA Descriptor" */
626 args[0] = desc[13]; /* status */
627 args[1] = desc[3]; /* error */
628 args[2] = desc[5]; /* sector count (0:7) */
629 args[3] = desc[7]; /* lbal */
630 args[4] = desc[9]; /* lbam */
631 args[5] = desc[11]; /* lbah */
632 args[6] = desc[12]; /* select */
633 if (copy_to_user(arg, args, sizeof(args)))
634 rc = -EFAULT;
635 }
636 }
637
638 if (cmd_result) {
b095518e 639 rc = -EIO;
af068bd1
DM		 640 goto error;
641 }
b095518e 642
af068bd1
DM		 643 error:
644 kfree(sensebuf);
b095518e
JG		 645 return rc;
646}
647
94be9a58
JG		 648int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
649 int cmd, void __user *arg)
1da177e4 650{
1da177e4
LT		 651 int val = -EINVAL, rc = -EINVAL;
652
1da177e4
LT		 653 switch (cmd) {
654 case ATA_IOC_GET_IO32:
655 val = 0;
656 if (copy_to_user(arg, &val, 1))
657 return -EFAULT;
658 return 0;
659
660 case ATA_IOC_SET_IO32:
661 val = (unsigned long) arg;
662 if (val != 0)
663 return -EINVAL;
664 return 0;
665
5924b74c 666 case HDIO_GET_IDENTITY:
94be9a58 667 return ata_get_identity(ap, scsidev, arg);
5924b74c 668
b095518e
JG		 669 case HDIO_DRIVE_CMD:
670 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
671 return -EACCES;
672 return ata_cmd_ioctl(scsidev, arg);
673
674 case HDIO_DRIVE_TASK:
675 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
676 return -EACCES;
677 return ata_task_ioctl(scsidev, arg);
678
1da177e4
LT		 679 default:
680 rc = -ENOTTY;
681 break;
682 }
683
1da177e4
LT		 684 return rc;
685}
94be9a58
JG		 686EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
687
688int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
689{
690 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
691 scsidev, cmd, arg);
692}
693EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 694
695/**
696 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 697 * @dev: ATA device to which the new command is attached
698 * @cmd: SCSI command that originated this ATA command
699 * @done: SCSI command completion function
700 *
701 * Obtain a reference to an unused ata_queued_cmd structure,
702 * which is the basic libata structure representing a single
703 * ATA command sent to the hardware.
704 *
705 * If a command was available, fill in the SCSI-specific
706 * portions of the structure with information on the
707 * current command.
708 *
709 * LOCKING:
cca3974e 710 * spin_lock_irqsave(host lock)
1da177e4
LT		 711 *
712 * RETURNS:
713 * Command allocated, or %NULL if none available.
714 */
7102d230
AB		 715static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
716 struct scsi_cmnd *cmd,
717 void (*done)(struct scsi_cmnd *))
1da177e4
LT		 718{
719 struct ata_queued_cmd *qc;
720
8a8bc223 721 qc = ata_qc_new_init(dev);
1da177e4
LT		 722 if (qc) {
723 qc->scsicmd = cmd;
724 qc->scsidone = done;
725
ff2aeb1e 726 qc->sg = scsi_sglist(cmd);
7120165c 727 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 728 } else {
729 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
730 done(cmd);
731 }
732
733 return qc;
734}
735
aacda375
TH		 736static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
737{
738 struct scsi_cmnd *scmd = qc->scsicmd;
739
740 qc->extrabytes = scmd->request->extra_len;
741 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
742}
743
b095518e
JG		 744/**
745 * ata_dump_status - user friendly display of error info
746 * @id: id of the port in question
747 * @tf: ptr to filled out taskfile
748 *
749 * Decode and dump the ATA error/status registers for the user so
750 * that they have some idea what really happened at the non
751 * make-believe layer.
752 *
753 * LOCKING:
754 * inherited from caller
755 */
7102d230 756static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 757{
758 u8 stat = tf->command, err = tf->feature;
759
760 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
761 if (stat & ATA_BUSY) {
762 printk("Busy }\n"); /* Data is not valid in this case */
763 } else {
764 if (stat & 0x40) printk("DriveReady ");
765 if (stat & 0x20) printk("DeviceFault ");
766 if (stat & 0x10) printk("SeekComplete ");
767 if (stat & 0x08) printk("DataRequest ");
768 if (stat & 0x04) printk("CorrectedError ");
769 if (stat & 0x02) printk("Index ");
770 if (stat & 0x01) printk("Error ");
771 printk("}\n");
772
773 if (err) {
774 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
775 if (err & 0x04) printk("DriveStatusError ");
776 if (err & 0x80) {
777 if (err & 0x04) printk("BadCRC ");
778 else printk("Sector ");
779 }
780 if (err & 0x40) printk("UncorrectableError ");
781 if (err & 0x10) printk("SectorIdNotFound ");
782 if (err & 0x02) printk("TrackZeroNotFound ");
783 if (err & 0x01) printk("AddrMarkNotFound ");
784 printk("}\n");
785 }
786 }
787}
788
1da177e4
LT		 789/**
790 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 791 * @id: ATA device number
1da177e4 792 * @drv_stat: value contained in ATA status register
b095518e
JG		 793 * @drv_err: value contained in ATA error register
794 * @sk: the sense key we'll fill out
795 * @asc: the additional sense code we'll fill out
796 * @ascq: the additional sense code qualifier we'll fill out
246619da 797 * @verbose: be verbose
1da177e4 798 *
b095518e
JG		 799 * Converts an ATA error into a SCSI error. Fill out pointers to
800 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
801 * format sense blocks.
1da177e4
LT		 802 *
803 * LOCKING:
cca3974e 804 * spin_lock_irqsave(host lock)
1da177e4 805 */
7102d230
AB		 806static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
807 u8 *asc, u8 *ascq, int verbose)
1da177e4 808{
b095518e 809 int i;
ffe75ef6 810
1da177e4 811 /* Based on the 3ware driver translation table */
98ac62de 812 static const unsigned char sense_table[][4] = {
1da177e4
LT		 813 /* BBD|ECC|ID|MAR */
814 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
815 /* BBD|ECC|ID */
816 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
817 /* ECC|MC|MARK */
818 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
819 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
820 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
821 /* MC|ID|ABRT|TRK0|MARK */
822 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
823 /* MCR|MARK */
824 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
825 /* Bad address mark */
826 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
827 /* TRK0 */
828 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
829 /* Abort & !ICRC */
830 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
831 /* Media change request */
832 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
833 /* SRV */
834 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
835 /* Media change */
836 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
837 /* ECC */
838 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
839 /* BBD - block marked bad */
840 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
841 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
842 };
98ac62de 843 static const unsigned char stat_table[][4] = {
1da177e4
LT		 844 /* Must be first because BUSY means no other bits valid */
845 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
846 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
847 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
848 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
849 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
850 };
1da177e4 851
1da177e4
LT		 852 /*
853 * Is this an error we can process/parse
854 */
b095518e
JG		 855 if (drv_stat & ATA_BUSY) {
856 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 857 }
b095518e
JG		 858
859 if (drv_err) {
860 /* Look for drv_err */
861 for (i = 0; sense_table[i][0] != 0xFF; i++) {
862 /* Look for best matches first */
2e9edbf8 863 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 864 sense_table[i][0]) {
865 *sk = sense_table[i][1];
866 *asc = sense_table[i][2];
867 *ascq = sense_table[i][3];
868 goto translate_done;
869 }
870 }
871 /* No immediate match */
246619da
TH		 872 if (verbose)
873 printk(KERN_WARNING "ata%u: no sense translation for "
874 "error 0x%02x\n", id, drv_err);
1da177e4 875 }
b095518e
JG		 876
877 /* Fall back to interpreting status bits */
878 for (i = 0; stat_table[i][0] != 0xFF; i++) {
879 if (stat_table[i][0] & drv_stat) {
880 *sk = stat_table[i][1];
881 *asc = stat_table[i][2];
882 *ascq = stat_table[i][3];
883 goto translate_done;
1da177e4 884 }
b095518e
JG		 885 }
886 /* No error? Undecoded? */
246619da
TH		 887 if (verbose)
888 printk(KERN_WARNING "ata%u: no sense translation for "
889 "status: 0x%02x\n", id, drv_stat);
b095518e 890
2d202024
AC		 891 /* We need a sensible error return here, which is tricky, and one
892 that won't cause people to do things like return a disk wrongly */
893 *sk = ABORTED_COMMAND;
894 *asc = 0x00;
895 *ascq = 0x00;
b095518e
JG		 896
897 translate_done:
246619da
TH		 898 if (verbose)
899 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
900 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
901 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 902 return;
903}
904
905/*
750426aa 906 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 907 * @qc: Command that completed.
908 *
909 * This function is specific to the ATA descriptor format sense
910 * block specified for the ATA pass through commands. Regardless
911 * of whether the command errored or not, return a sense
912 * block. Copy all controller registers into the sense
913 * block. Clear sense key, ASC & ASCQ if there is no error.
914 *
915 * LOCKING:
750426aa 916 * None.
b095518e 917 */
750426aa 918static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 919{
920 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 921 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 922 unsigned char *sb = cmd->sense_buffer;
923 unsigned char *desc = sb + 8;
246619da 924 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 925
926 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
927
0e5dec47 928 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 929
b095518e
JG		 930 /*
931 * Use ata_to_sense_error() to map status register bits
932 * onto sense key, asc & ascq.
933 */
058e55e1
TH		 934 if (qc->err_mask ||
935 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 936 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 937 &sb[1], &sb[2], &sb[3], verbose);
b095518e 938 sb[1] &= 0x0f;
1da177e4
LT		 939 }
940
b095518e
JG		 941 /*
942 * Sense data is current and format is descriptor.
943 */
944 sb[0] = 0x72;
1da177e4 945
b095518e
JG		 946 desc[0] = 0x09;
947
f38621b3
TH		 948 /* set length of additional sense data */
949 sb[7] = 14;
950 desc[1] = 12;
b095518e
JG		 951
952 /*
953 * Copy registers into sense buffer.
954 */
955 desc[2] = 0x00;
956 desc[3] = tf->feature; /* == error reg */
957 desc[5] = tf->nsect;
958 desc[7] = tf->lbal;
959 desc[9] = tf->lbam;
960 desc[11] = tf->lbah;
961 desc[12] = tf->device;
962 desc[13] = tf->command; /* == status reg */
963
964 /*
965 * Fill in Extend bit, and the high order bytes
966 * if applicable.
967 */
968 if (tf->flags & ATA_TFLAG_LBA48) {
969 desc[2] |= 0x01;
970 desc[4] = tf->hob_nsect;
971 desc[6] = tf->hob_lbal;
972 desc[8] = tf->hob_lbam;
973 desc[10] = tf->hob_lbah;
1da177e4 974 }
b095518e 975}
1da177e4 976
b095518e 977/**
750426aa 978 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 979 * @qc: Command that we are erroring out
980 *
d25614ba
TH		 981 * Generate sense block for a failed ATA command @qc. Descriptor
982 * format is used to accomodate LBA48 block address.
b095518e
JG		 983 *
984 * LOCKING:
750426aa 985 * None.
b095518e 986 */
750426aa 987static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 988{
d25614ba 989 struct ata_device *dev = qc->dev;
b095518e 990 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 991 struct ata_taskfile *tf = &qc->result_tf;
b095518e 992 unsigned char *sb = cmd->sense_buffer;
d25614ba 993 unsigned char *desc = sb + 8;
246619da 994 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 995 u64 block;
b095518e
JG		 996
997 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
998
0e5dec47 999 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1000
d25614ba
TH		 1001 /* sense data is current and format is descriptor */
1002 sb[0] = 0x72;
1003
1004 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1005 * onto sense key, asc & ascq.
1006 */
058e55e1
TH		 1007 if (qc->err_mask ||
1008 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1009 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1010 &sb[1], &sb[2], &sb[3], verbose);
1011 sb[1] &= 0x0f;
1da177e4 1012 }
1da177e4 1013
d25614ba 1014 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1015
d25614ba
TH		 1016 /* information sense data descriptor */
1017 sb[7] = 12;
1018 desc[0] = 0x00;
1019 desc[1] = 10;
a7dac447 1020
d25614ba
TH		 1021 desc[2] |= 0x80; /* valid */
1022 desc[6] = block >> 40;
1023 desc[7] = block >> 32;
1024 desc[8] = block >> 24;
1025 desc[9] = block >> 16;
1026 desc[10] = block >> 8;
1027 desc[11] = block;
1da177e4
LT		 1028}
1029
a6cce2a7
BK		 1030static void ata_scsi_sdev_config(struct scsi_device *sdev)
1031{
1032 sdev->use_10_for_rw = 1;
1033 sdev->use_10_for_ms = 1;
31cc23b3
TH		 1034
1035 /* Schedule policy is determined by ->qc_defer() callback and
1036 * it needs to see every deferred qc. Set dev_blocked to 1 to
1037 * prevent SCSI midlayer from automatically deferring
1038 * requests.
1039 */
1040 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1041}
1042
fa2fc7f4
JB		 1043/**
1044 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1045 * @rq: request to be checked
fa2fc7f4
JB		 1046 *
1047 * ATAPI commands which transfer variable length data to host
1048 * might overflow due to application error or hardare bug. This
1049 * function checks whether overflow should be drained and ignored
1050 * for @request.
1051 *
1052 * LOCKING:
1053 * None.
1054 *
1055 * RETURNS:
1056 * 1 if ; otherwise, 0.
1057 */
1058static int atapi_drain_needed(struct request *rq)
1059{
1060 if (likely(!blk_pc_request(rq)))
1061 return 0;
1062
1063 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
1064 return 0;
1065
1066 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1067}
1068
1069static int ata_scsi_dev_config(struct scsi_device *sdev,
1070 struct ata_device *dev)
a6cce2a7 1071{
45fabbb7
EO		 1072 if (!ata_id_has_unload(dev->id))
1073 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1074
914ed354
TH		 1075 /* configure max sectors */
1076 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 1077
fa2fc7f4
JB		 1078 if (dev->class == ATA_DEV_ATAPI) {
1079 struct request_queue *q = sdev->request_queue;
1080 void *buf;
1081
e3790c7d 1082 /* set the min alignment and padding */
d0ad3bc9
JB		 1083 blk_queue_update_dma_alignment(sdev->request_queue,
1084 ATA_DMA_PAD_SZ - 1);
27f8221a
FT		 1085 blk_queue_update_dma_pad(sdev->request_queue,
1086 ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1087
1088 /* configure draining */
1089 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1090 if (!buf) {
1091 ata_dev_printk(dev, KERN_ERR,
1092 "drain buffer allocation failed\n");
1093 return -ENOMEM;
1094 }
1095
1096 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1097 } else {
8bff7c6b
JA		 1098 if (ata_id_is_ssd(dev->id))
1099 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1100 sdev->request_queue);
1101
d0ad3bc9
JB		 1102 /* ATA devices must be sector aligned */
1103 blk_queue_update_dma_alignment(sdev->request_queue,
1104 ATA_SECT_SIZE - 1);
d8cf5389 1105 sdev->manage_start_stop = 1;
dde20207 1106 }
d8cf5389 1107
f26792d5
JG		 1108 if (dev->flags & ATA_DFLAG_AN)
1109 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1110
a6e6ce8e
TH		 1111 if (dev->flags & ATA_DFLAG_NCQ) {
1112 int depth;
1113
1114 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1115 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1116 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1117 }
fa2fc7f4
JB		 1118
1119 return 0;
a6cce2a7
BK		 1120}
1121
1da177e4
LT		 1122/**
1123 * ata_scsi_slave_config - Set SCSI device attributes
1124 * @sdev: SCSI device to examine
1125 *
1126 * This is called before we actually start reading
1127 * and writing to the device, to configure certain
1128 * SCSI mid-layer behaviors.
1129 *
1130 * LOCKING:
1131 * Defined by SCSI layer. We don't really care.
1132 */
1133
1134int ata_scsi_slave_config(struct scsi_device *sdev)
1135{
31534363
TH		 1136 struct ata_port *ap = ata_shost_to_port(sdev->host);
1137 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1138 int rc = 0;
31534363 1139
a6cce2a7 1140 ata_scsi_sdev_config(sdev);
1da177e4 1141
31534363 1142 if (dev)
fa2fc7f4 1143 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1144
fa2fc7f4 1145 return rc;
1da177e4
LT		 1146}
1147
83c47bcb
TH		 1148/**
1149 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1150 * @sdev: SCSI device to be destroyed
1151 *
1152 * @sdev is about to be destroyed for hot/warm unplugging. If
1153 * this unplugging was initiated by libata as indicated by NULL
1154 * dev->sdev, this function doesn't have to do anything.
1155 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1156 * Clear dev->sdev, schedule the device for ATA detach and invoke
1157 * EH.
1158 *
1159 * LOCKING:
1160 * Defined by SCSI layer. We don't really care.
1161 */
1162void ata_scsi_slave_destroy(struct scsi_device *sdev)
1163{
1164 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1165 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1166 unsigned long flags;
1167 struct ata_device *dev;
1168
1169 if (!ap->ops->error_handler)
1170 return;
1171
ba6a1308 1172 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1173 dev = __ata_scsi_find_dev(ap, sdev);
1174 if (dev && dev->sdev) {
1175 /* SCSI device already in CANCEL state, no need to offline it */
1176 dev->sdev = NULL;
1177 dev->flags |= ATA_DFLAG_DETACH;
1178 ata_port_schedule_eh(ap);
1179 }
ba6a1308 1180 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1181
1182 kfree(q->dma_drain_buffer);
1183 q->dma_drain_buffer = NULL;
1184 q->dma_drain_size = 0;
83c47bcb
TH		 1185}
1186
a6e6ce8e
TH		 1187/**
1188 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1189 * @sdev: SCSI device to configure queue depth for
1190 * @queue_depth: new queue depth
1191 *
1192 * This is libata standard hostt->change_queue_depth callback.
1193 * SCSI will call into this callback when user tries to set queue
1194 * depth via sysfs.
1195 *
1196 * LOCKING:
1197 * SCSI layer (we don't care)
1198 *
1199 * RETURNS:
1200 * Newly configured queue depth.
1201 */
1202int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1203{
1204 struct ata_port *ap = ata_shost_to_port(sdev->host);
1205 struct ata_device *dev;
360f654e 1206 unsigned long flags;
a6e6ce8e 1207
c3c70c44 1208 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1209 return sdev->queue_depth;
1210
1211 dev = ata_scsi_find_dev(ap, sdev);
1212 if (!dev || !ata_dev_enabled(dev))
1213 return sdev->queue_depth;
1214
c3c70c44 1215 /* NCQ enabled? */
360f654e 1216 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1217 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1218 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1219 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1220 queue_depth = 1;
1221 }
360f654e
TH		 1222 spin_unlock_irqrestore(ap->lock, flags);
1223
c3c70c44
TH		 1224 /* limit and apply queue depth */
1225 queue_depth = min(queue_depth, sdev->host->can_queue);
1226 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1227 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1228
1229 if (sdev->queue_depth == queue_depth)
1230 return -EINVAL;
1231
1232 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1233 return queue_depth;
1234}
1235
d9aca22c 1236/* XXX: for spindown warning */
da071b42
TH		 1237static void ata_delayed_done_timerfn(unsigned long arg)
1238{
1239 struct scsi_cmnd *scmd = (void *)arg;
1240
1241 scmd->scsi_done(scmd);
1242}
1243
d9aca22c 1244/* XXX: for spindown warning */
da071b42
TH		 1245static void ata_delayed_done(struct scsi_cmnd *scmd)
1246{
1247 static struct timer_list timer;
1248
1249 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1250 mod_timer(&timer, jiffies + 5 * HZ);
1251}
1252
972dcafb
DG		 1253/**
1254 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1255 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1256 *
1257 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1258 * (to start). Perhaps these commands should be preceded by
1259 * CHECK POWER MODE to see what power mode the device is already in.
1260 * [See SAT revision 5 at www.t10.org]
1261 *
1262 * LOCKING:
cca3974e 1263 * spin_lock_irqsave(host lock)
972dcafb
DG		 1264 *
1265 * RETURNS:
1266 * Zero on success, non-zero on error.
1267 */
ad706991 1268static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1269{
542b1444 1270 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1271 struct ata_taskfile *tf = &qc->tf;
ad706991 1272 const u8 *cdb = scmd->cmnd;
972dcafb 1273
2e5704f6
TH		 1274 if (scmd->cmd_len < 5)
1275 goto invalid_fld;
1276
972dcafb
DG		 1277 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1278 tf->protocol = ATA_PROT_NODATA;
542b1444 1279 if (cdb[1] & 0x1) {
972dcafb
DG		 1280 ; /* ignore IMMED bit, violates sat-r05 */
1281 }
542b1444 1282 if (cdb[4] & 0x2)
ae006510 1283 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1284 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1285 goto invalid_fld; /* power conditions not supported */
e31e8531 1286
542b1444 1287 if (cdb[4] & 0x1) {
972dcafb 1288 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1289
1290 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1291 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1292
1293 tf->lbah = 0x0;
1294 tf->lbam = 0x0;
1295 tf->lbal = 0x0;
1296 tf->device |= ATA_LBA;
1297 } else {
1298 /* CHS */
1299 tf->lbal = 0x1; /* sect */
1300 tf->lbam = 0x0; /* cyl low */
1301 tf->lbah = 0x0; /* cyl high */
1302 }
1303
972dcafb 1304 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10
TH		 1305 } else {
1306 /* XXX: This is for backward compatibility, will be
1307 * removed. Read Documentation/feature-removal-schedule.txt
1308 * for more info.
1309 */
d9aca22c 1310 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
920a4b10
TH		 1311 (system_state == SYSTEM_HALT ||
1312 system_state == SYSTEM_POWER_OFF)) {
2dcb407e 1313 static unsigned long warned;
920a4b10 1314
da071b42 1315 if (!test_and_set_bit(0, &warned)) {
920a4b10
TH		 1316 ata_dev_printk(qc->dev, KERN_WARNING,
1317 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1318 "UPDATE SHUTDOWN UTILITY\n");
1319 ata_dev_printk(qc->dev, KERN_WARNING,
1320 "For more info, visit "
1321 "http://linux-ata.org/shutdown.html\n");
da071b42
TH		 1322
1323 /* ->scsi_done is not used, use it for
1324 * delayed completion.
1325 */
1326 scmd->scsi_done = qc->scsidone;
1327 qc->scsidone = ata_delayed_done;
920a4b10
TH		 1328 }
1329 scmd->result = SAM_STAT_GOOD;
1330 return 1;
1331 }
1332
78981a7c
RH		 1333 /* Issue ATA STANDBY IMMEDIATE command */
1334 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1335 }
78981a7c 1336
972dcafb
DG		 1337 /*
1338 * Standby and Idle condition timers could be implemented but that
1339 * would require libata to implement the Power condition mode page
1340 * and allow the user to change it. Changing mode pages requires
1341 * MODE SELECT to be implemented.
1342 */
1343
1344 return 0;
ae006510
DG		 1345
1346invalid_fld:
542b1444 1347 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1348 /* "Invalid field in cbd" */
1349 return 1;
972dcafb
DG		 1350}
1351
1352
1da177e4
LT		 1353/**
1354 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1355 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1356 *
1357 * Sets up an ATA taskfile to issue FLUSH CACHE or
1358 * FLUSH CACHE EXT.
1359 *
1360 * LOCKING:
cca3974e 1361 * spin_lock_irqsave(host lock)
1da177e4
LT		 1362 *
1363 * RETURNS:
1364 * Zero on success, non-zero on error.
1365 */
ad706991 1366static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1367{
1368 struct ata_taskfile *tf = &qc->tf;
1369
1370 tf->flags |= ATA_TFLAG_DEVICE;
1371 tf->protocol = ATA_PROT_NODATA;
1372
6fc49adb 1373 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1374 tf->command = ATA_CMD_FLUSH_EXT;
1375 else
1376 tf->command = ATA_CMD_FLUSH;
1377
b666da35
TH		 1378 /* flush is critical for IO integrity, consider it an IO command */
1379 qc->flags |= ATA_QCFLAG_IO;
1380
1da177e4
LT		 1381 return 0;
1382}
1383
3aef5231
AL		 1384/**
1385 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1386 * @cdb: SCSI command to translate
3aef5231
AL		 1387 *
1388 * Calculate LBA and transfer length for 6-byte commands.
1389 *
1390 * RETURNS:
1391 * @plba: the LBA
1392 * @plen: the transfer length
1393 */
542b1444 1394static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1395{
1396 u64 lba = 0;
6c7b7d2b 1397 u32 len;
3aef5231
AL		 1398
1399 VPRINTK("six-byte command\n");
1400
6c7b7d2b 1401 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1402 lba |= ((u64)cdb[2]) << 8;
1403 lba |= ((u64)cdb[3]);
3aef5231 1404
6c7b7d2b 1405 len = cdb[4];
3aef5231
AL		 1406
1407 *plba = lba;
1408 *plen = len;
1409}
1410
1411/**
1412 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1413 * @cdb: SCSI command to translate
3aef5231
AL		 1414 *
1415 * Calculate LBA and transfer length for 10-byte commands.
1416 *
1417 * RETURNS:
1418 * @plba: the LBA
1419 * @plen: the transfer length
1420 */
542b1444 1421static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1422{
1423 u64 lba = 0;
1424 u32 len = 0;
1425
1426 VPRINTK("ten-byte command\n");
1427
542b1444
TH		 1428 lba |= ((u64)cdb[2]) << 24;
1429 lba |= ((u64)cdb[3]) << 16;
1430 lba |= ((u64)cdb[4]) << 8;
1431 lba |= ((u64)cdb[5]);
3aef5231 1432
542b1444
TH		 1433 len |= ((u32)cdb[7]) << 8;
1434 len |= ((u32)cdb[8]);
3aef5231
AL		 1435
1436 *plba = lba;
1437 *plen = len;
1438}
1439
1440/**
1441 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1442 * @cdb: SCSI command to translate
3aef5231
AL		 1443 *
1444 * Calculate LBA and transfer length for 16-byte commands.
1445 *
1446 * RETURNS:
1447 * @plba: the LBA
1448 * @plen: the transfer length
1449 */
542b1444 1450static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1451{
1452 u64 lba = 0;
1453 u32 len = 0;
1454
1455 VPRINTK("sixteen-byte command\n");
1456
542b1444
TH		 1457 lba |= ((u64)cdb[2]) << 56;
1458 lba |= ((u64)cdb[3]) << 48;
1459 lba |= ((u64)cdb[4]) << 40;
1460 lba |= ((u64)cdb[5]) << 32;
1461 lba |= ((u64)cdb[6]) << 24;
1462 lba |= ((u64)cdb[7]) << 16;
1463 lba |= ((u64)cdb[8]) << 8;
1464 lba |= ((u64)cdb[9]);
3aef5231 1465
542b1444
TH		 1466 len |= ((u32)cdb[10]) << 24;
1467 len |= ((u32)cdb[11]) << 16;
1468 len |= ((u32)cdb[12]) << 8;
1469 len |= ((u32)cdb[13]);
3aef5231
AL		 1470
1471 *plba = lba;
1472 *plen = len;
1473}
1474
1da177e4
LT		 1475/**
1476 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1477 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1478 *
1479 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1480 *
1481 * LOCKING:
cca3974e 1482 * spin_lock_irqsave(host lock)
1da177e4
LT		 1483 *
1484 * RETURNS:
1485 * Zero on success, non-zero on error.
1486 */
ad706991 1487static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1488{
542b1444 1489 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1490 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1491 struct ata_device *dev = qc->dev;
1da177e4 1492 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1493 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1494 u64 block;
1495 u32 n_block;
1da177e4
LT		 1496
1497 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1498 tf->protocol = ATA_PROT_NODATA;
1da177e4 1499
2e5704f6
TH		 1500 if (cdb[0] == VERIFY) {
1501 if (scmd->cmd_len < 10)
1502 goto invalid_fld;
542b1444 1503 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1504 } else if (cdb[0] == VERIFY_16) {
1505 if (scmd->cmd_len < 16)
1506 goto invalid_fld;
542b1444 1507 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1508 } else
ae006510 1509 goto invalid_fld;
1da177e4 1510
8bf62ece 1511 if (!n_block)
ae006510 1512 goto nothing_to_do;
8bf62ece 1513 if (block >= dev_sectors)
ae006510 1514 goto out_of_range;
8bf62ece 1515 if ((block + n_block) > dev_sectors)
ae006510 1516 goto out_of_range;
1da177e4 1517
07506697
AL		 1518 if (dev->flags & ATA_DFLAG_LBA) {
1519 tf->flags |= ATA_TFLAG_LBA;
1520
c6a33e24
AL		 1521 if (lba_28_ok(block, n_block)) {
1522 /* use LBA28 */
1523 tf->command = ATA_CMD_VERIFY;
1524 tf->device |= (block >> 24) & 0xf;
1525 } else if (lba_48_ok(block, n_block)) {
1526 if (!(dev->flags & ATA_DFLAG_LBA48))
1527 goto out_of_range;
07506697
AL		 1528
1529 /* use LBA48 */
1530 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1531 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1532
8bf62ece 1533 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1534
8bf62ece
AL		 1535 tf->hob_lbah = (block >> 40) & 0xff;
1536 tf->hob_lbam = (block >> 32) & 0xff;
1537 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1538 } else
1539 /* request too large even for LBA48 */
1540 goto out_of_range;
8bf62ece
AL		 1541
1542 tf->nsect = n_block & 0xff;
1da177e4 1543
8bf62ece
AL		 1544 tf->lbah = (block >> 16) & 0xff;
1545 tf->lbam = (block >> 8) & 0xff;
1546 tf->lbal = block & 0xff;
1da177e4 1547
8bf62ece
AL		 1548 tf->device |= ATA_LBA;
1549 } else {
1550 /* CHS */
1551 u32 sect, head, cyl, track;
1552
c6a33e24
AL		 1553 if (!lba_28_ok(block, n_block))
1554 goto out_of_range;
07506697 1555
8bf62ece
AL		 1556 /* Convert LBA to CHS */
1557 track = (u32)block / dev->sectors;
1558 cyl = track / dev->heads;
1559 head = track % dev->heads;
1560 sect = (u32)block % dev->sectors + 1;
1561
c187c4b5
AL		 1562 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1563 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1564
1565 /* Check whether the converted CHS can fit.
1566 Cylinder: 0-65535
8bf62ece
AL		 1567 Head: 0-15
1568 Sector: 1-255*/
2e9edbf8 1569 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1570 goto out_of_range;
2e9edbf8 1571
8bf62ece
AL		 1572 tf->command = ATA_CMD_VERIFY;
1573 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1574 tf->lbal = sect;
1575 tf->lbam = cyl;
1576 tf->lbah = cyl >> 8;
1577 tf->device |= head;
1578 }
1da177e4
LT		 1579
1580 return 0;
ae006510
DG		 1581
1582invalid_fld:
542b1444 1583 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1584 /* "Invalid field in cbd" */
1585 return 1;
1586
1587out_of_range:
542b1444 1588 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1589 /* "Logical Block Address out of range" */
1590 return 1;
1591
1592nothing_to_do:
542b1444 1593 scmd->result = SAM_STAT_GOOD;
ae006510 1594 return 1;
1da177e4
LT		 1595}
1596
1597/**
1598 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1599 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1600 *
1601 * Converts any of six SCSI read/write commands into the
1602 * ATA counterpart, including starting sector (LBA),
1603 * sector count, and taking into account the device's LBA48
1604 * support.
1605 *
1606 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1607 * %WRITE_16 are currently supported.
1608 *
1609 * LOCKING:
cca3974e 1610 * spin_lock_irqsave(host lock)
1da177e4
LT		 1611 *
1612 * RETURNS:
1613 * Zero on success, non-zero on error.
1614 */
ad706991 1615static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1616{
542b1444 1617 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1618 const u8 *cdb = scmd->cmnd;
bd056d7e 1619 unsigned int tf_flags = 0;
3aef5231
AL		 1620 u64 block;
1621 u32 n_block;
bd056d7e 1622 int rc;
1da177e4 1623
542b1444 1624 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1625 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1626
9a3dccc4 1627 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1628 switch (cdb[0]) {
3aef5231
AL		 1629 case READ_10:
1630 case WRITE_10:
2e5704f6
TH		 1631 if (unlikely(scmd->cmd_len < 10))
1632 goto invalid_fld;
542b1444
TH		 1633 scsi_10_lba_len(cdb, &block, &n_block);
1634 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1635 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1636 break;
1637 case READ_6:
1638 case WRITE_6:
2e5704f6
TH		 1639 if (unlikely(scmd->cmd_len < 6))
1640 goto invalid_fld;
542b1444 1641 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1642
1643 /* for 6-byte r/w commands, transfer length 0
1644 * means 256 blocks of data, not 0 block.
1645 */
76b2bf9b
JG		 1646 if (!n_block)
1647 n_block = 256;
3aef5231
AL		 1648 break;
1649 case READ_16:
1650 case WRITE_16:
2e5704f6
TH		 1651 if (unlikely(scmd->cmd_len < 16))
1652 goto invalid_fld;
542b1444
TH		 1653 scsi_16_lba_len(cdb, &block, &n_block);
1654 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1655 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1656 break;
1657 default:
8bf62ece 1658 DPRINTK("no-byte command\n");
ae006510 1659 goto invalid_fld;
1da177e4
LT		 1660 }
1661
8bf62ece
AL		 1662 /* Check and compose ATA command */
1663 if (!n_block)
c187c4b5
AL		 1664 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1665 * length 0 means transfer 0 block of data.
1666 * However, for ATA R/W commands, sector count 0 means
1667 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1668 *
1669 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1670 */
ae006510 1671 goto nothing_to_do;
1da177e4 1672
bd056d7e 1673 qc->flags |= ATA_QCFLAG_IO;
726f0785 1674 qc->nbytes = n_block * ATA_SECT_SIZE;
1da177e4 1675
bd056d7e
TH		 1676 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1677 qc->tag);
1678 if (likely(rc == 0))
1679 return 0;
ae006510 1680
bd056d7e
TH		 1681 if (rc == -ERANGE)
1682 goto out_of_range;
1683 /* treat all other errors as -EINVAL, fall through */
ae006510 1684invalid_fld:
542b1444 1685 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1686 /* "Invalid field in cbd" */
1687 return 1;
1688
1689out_of_range:
542b1444 1690 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1691 /* "Logical Block Address out of range" */
1692 return 1;
1693
1694nothing_to_do:
542b1444 1695 scmd->result = SAM_STAT_GOOD;
ae006510 1696 return 1;
1da177e4
LT		 1697}
1698
77853bf2 1699static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1700{
c31f571d 1701 struct ata_port *ap = qc->ap;
1da177e4 1702 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1703 u8 *cdb = cmd->cmnd;
2dcb407e 1704 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1705
1706 /* For ATA pass thru (SAT) commands, generate a sense block if
1707 * user mandated it or if there's an error. Note that if we
1708 * generate because the user forced us to, a check condition
1709 * is generated and the ATA register values are returned
1710 * whether the command completed successfully or not. If there
1711 * was no error, SK, ASC and ASCQ will all be zero.
1712 */
a7dac447 1713 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1714 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1715 ata_gen_passthru_sense(qc);
b095518e
JG		 1716 } else {
1717 if (!need_sense) {
1718 cmd->result = SAM_STAT_GOOD;
1719 } else {
1720 /* TODO: decide which descriptor format to use
1721 * for 48b LBA devices and call that here
1722 * instead of the fixed desc, which is only
1723 * good for smaller LBA (and maybe CHS?)
1724 * devices.
1725 */
750426aa 1726 ata_gen_ata_sense(qc);
b095518e
JG		 1727 }
1728 }
1da177e4 1729
d9aca22c 1730 /* XXX: track spindown state for spindown skipping and warning */
13b8d09f
TH		 1731 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1732 qc->tf.command == ATA_CMD_STANDBYNOW1))
1733 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1734 else if (likely(system_state != SYSTEM_HALT &&
1735 system_state != SYSTEM_POWER_OFF))
1736 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1737
c31f571d 1738 if (need_sense && !ap->ops->error_handler)
44877b4e 1739 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1740
1741 qc->scsidone(cmd);
1742
77853bf2 1743 ata_qc_free(qc);
1da177e4
LT		 1744}
1745
1746/**
1747 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1748 * @dev: ATA device to which the command is addressed
1749 * @cmd: SCSI command to execute
1750 * @done: SCSI command completion function
1751 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1752 *
1753 * Our ->queuecommand() function has decided that the SCSI
1754 * command issued can be directly translated into an ATA
1755 * command, rather than handled internally.
1756 *
1757 * This function sets up an ata_queued_cmd structure for the
1758 * SCSI command, and sends that ata_queued_cmd to the hardware.
1759 *
ae006510
DG		 1760 * The xlat_func argument (actor) returns 0 if ready to execute
1761 * ATA command, else 1 to finish translation. If 1 is returned
1762 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1763 * to be set reflecting an error condition or clean (early)
1764 * termination.
1765 *
1da177e4 1766 * LOCKING:
cca3974e 1767 * spin_lock_irqsave(host lock)
2115ea94
TH		 1768 *
1769 * RETURNS:
1770 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1771 * needs to be deferred.
1da177e4 1772 */
2115ea94
TH		 1773static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1774 void (*done)(struct scsi_cmnd *),
1775 ata_xlat_func_t xlat_func)
1da177e4 1776{
31cc23b3 1777 struct ata_port *ap = dev->link->ap;
1da177e4 1778 struct ata_queued_cmd *qc;
31cc23b3 1779 int rc;
1da177e4
LT		 1780
1781 VPRINTK("ENTER\n");
1782
3373efd8 1783 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1784 if (!qc)
ae006510 1785 goto err_mem;
1da177e4
LT		 1786
1787 /* data is present; dma-map it */
be7db055 1788 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1789 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1790 if (unlikely(scsi_bufflen(cmd) < 1)) {
f15a1daf
TH		 1791 ata_dev_printk(dev, KERN_WARNING,
1792 "WARNING: zero len r/w req\n");
ae006510 1793 goto err_did;
1da177e4
LT		 1794 }
1795
7120165c 1796 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1797
1798 qc->dma_dir = cmd->sc_data_direction;
1799 }
1800
1801 qc->complete_fn = ata_scsi_qc_complete;
1802
ad706991 1803 if (xlat_func(qc))
ae006510 1804 goto early_finish;
1da177e4 1805
31cc23b3
TH		 1806 if (ap->ops->qc_defer) {
1807 if ((rc = ap->ops->qc_defer(qc)))
1808 goto defer;
1809 }
1810
1da177e4 1811 /* select device, send command to hardware */
8e0e694a 1812 ata_qc_issue(qc);
1da177e4
LT		 1813
1814 VPRINTK("EXIT\n");
2115ea94 1815 return 0;
1da177e4 1816
ae006510 1817early_finish:
2dcb407e 1818 ata_qc_free(qc);
da071b42 1819 qc->scsidone(cmd);
ae006510 1820 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1821 return 0;
ae006510
DG		 1822
1823err_did:
1da177e4 1824 ata_qc_free(qc);
ae006510 1825 cmd->result = (DID_ERROR << 16);
da071b42 1826 qc->scsidone(cmd);
253b92ec 1827err_mem:
ae006510 1828 DPRINTK("EXIT - internal\n");
2115ea94 1829 return 0;
3dc1d881
TH		 1830
1831defer:
31cc23b3 1832 ata_qc_free(qc);
3dc1d881 1833 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1834 if (rc == ATA_DEFER_LINK)
1835 return SCSI_MLQUEUE_DEVICE_BUSY;
1836 else
1837 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1838}
1839
1840/**
1841 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1842 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1843 * @flags: unsigned long variable to store irq enable status
1844 * @copy_in: copy in from user buffer
1da177e4 1845 *
87340e98 1846 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1847 *
1848 * LOCKING:
87340e98 1849 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1850 *
1851 * RETURNS:
87340e98 1852 * Pointer to response buffer.
1da177e4 1853 */
87340e98
TH		 1854static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1855 unsigned long *flags)
1da177e4 1856{
87340e98 1857 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1858
87340e98
TH		 1859 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1860 if (copy_in)
1861 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1862 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1863 return ata_scsi_rbuf;
1da177e4
LT		 1864}
1865
1866/**
1867 * ata_scsi_rbuf_put - Unmap response buffer.
1868 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1869 * @copy_out: copy out result
1870 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1871 *
87340e98
TH		 1872 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1873 * @copy_back is true.
1da177e4
LT		 1874 *
1875 * LOCKING:
87340e98 1876 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1877 */
87340e98
TH		 1878static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1879 unsigned long *flags)
1da177e4 1880{
87340e98
TH		 1881 if (copy_out)
1882 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1883 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1884 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1885}
1886
1887/**
1888 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1889 * @args: device IDENTIFY data / SCSI command of interest.
1890 * @actor: Callback hook for desired SCSI command simulator
1891 *
1892 * Takes care of the hard work of simulating a SCSI command...
1893 * Mapping the response buffer, calling the command's handler,
1894 * and handling the handler's return value. This return value
1895 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1896 * completed successfully (0), or not (in which case cmd->result
1897 * and sense buffer are assumed to be set).
1da177e4
LT		 1898 *
1899 * LOCKING:
cca3974e 1900 * spin_lock_irqsave(host lock)
1da177e4 1901 */
f0761be3 1902static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1903 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1904{
1905 u8 *rbuf;
87340e98 1906 unsigned int rc;
1da177e4 1907 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1908 unsigned long flags;
1909
87340e98
TH		 1910 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1911 rc = actor(args, rbuf);
1912 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1913
ae006510 1914 if (rc == 0)
1da177e4 1915 cmd->result = SAM_STAT_GOOD;
ae006510 1916 args->done(cmd);
1da177e4
LT		 1917}
1918
1919/**
1920 * ata_scsiop_inq_std - Simulate INQUIRY command
1921 * @args: device IDENTIFY data / SCSI command of interest.
1922 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1923 *
1924 * Returns standard device identification data associated
b142eb65 1925 * with non-VPD INQUIRY command output.
1da177e4
LT		 1926 *
1927 * LOCKING:
cca3974e 1928 * spin_lock_irqsave(host lock)
1da177e4 1929 */
87340e98 1930static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1931{
87340e98
TH		 1932 const u8 versions[] = {
1933 0x60, /* SAM-3 (no version claimed) */
1934
1935 0x03,
1936 0x20, /* SBC-2 (no version claimed) */
1937
1938 0x02,
1939 0x60 /* SPC-3 (no version claimed) */
1940 };
1da177e4
LT		 1941 u8 hdr[] = {
1942 TYPE_DISK,
1943 0,
1944 0x5, /* claim SPC-3 version compatibility */
1945 2,
1946 95 - 4
1947 };
1948
87340e98
TH		 1949 VPRINTK("ENTER\n");
1950
1da177e4
LT		 1951 /* set scsi removeable (RMB) bit per ata bit */
1952 if (ata_id_removeable(args->id))
1953 hdr[1] |= (1 << 7);
1954
1da177e4 1955 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1956 memcpy(&rbuf[8], "ATA ", 8);
1957 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1958 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1959
87340e98
TH		 1960 if (rbuf[32] == 0 || rbuf[32] == ' ')
1961 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1962
87340e98 1963 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1964
1965 return 0;
1966}
1967
1968/**
b142eb65 1969 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1970 * @args: device IDENTIFY data / SCSI command of interest.
1971 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1972 *
b142eb65 1973 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1974 *
1975 * LOCKING:
cca3974e 1976 * spin_lock_irqsave(host lock)
1da177e4 1977 */
87340e98 1978static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1979{
1980 const u8 pages[] = {
1981 0x00, /* page 0x00, this page */
1982 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 1983 0x83, /* page 0x83, device ident page */
1984 0x89, /* page 0x89, ata info page */
1985 0xb1, /* page 0xb1, block device characteristics page */
1da177e4 1986 };
1da177e4 1987
87340e98
TH		 1988 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1989 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 1990 return 0;
1991}
1992
1993/**
b142eb65 1994 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1995 * @args: device IDENTIFY data / SCSI command of interest.
1996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1997 *
1998 * Returns ATA device serial number.
1999 *
2000 * LOCKING:
cca3974e 2001 * spin_lock_irqsave(host lock)
1da177e4 2002 */
87340e98 2003static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2004{
2005 const u8 hdr[] = {
2006 0,
2007 0x80, /* this page code */
2008 0,
a0cf733b 2009 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2010 };
1da177e4 2011
87340e98
TH		 2012 memcpy(rbuf, hdr, sizeof(hdr));
2013 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2014 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2015 return 0;
2016}
2017
1da177e4 2018/**
b142eb65 2019 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2020 * @args: device IDENTIFY data / SCSI command of interest.
2021 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2022 *
b142eb65
JG		 2023 * Yields two logical unit device identification designators:
2024 * - vendor specific ASCII containing the ATA serial number
2025 * - SAT defined "t10 vendor id based" containing ASCII vendor
2026 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2027 *
2028 * LOCKING:
cca3974e 2029 * spin_lock_irqsave(host lock)
1da177e4 2030 */
87340e98 2031static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2032{
b142eb65 2033 const int sat_model_serial_desc_len = 68;
87340e98 2034 int num;
1da177e4 2035
b142eb65
JG		 2036 rbuf[1] = 0x83; /* this page code */
2037 num = 4;
2038
87340e98
TH		 2039 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2040 rbuf[num + 0] = 2;
2041 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2042 num += 4;
2043 ata_id_string(args->id, (unsigned char *) rbuf + num,
2044 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2045 num += ATA_ID_SERNO_LEN;
2046
2047 /* SAT defined lu model and serial numbers descriptor */
2048 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2049 rbuf[num + 0] = 2;
2050 rbuf[num + 1] = 1;
2051 rbuf[num + 3] = sat_model_serial_desc_len;
2052 num += 4;
2053 memcpy(rbuf + num, "ATA ", 8);
2054 num += 8;
2055 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2056 ATA_ID_PROD_LEN);
2057 num += ATA_ID_PROD_LEN;
2058 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2059 ATA_ID_SERNO_LEN);
2060 num += ATA_ID_SERNO_LEN;
2061
b142eb65 2062 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2063 return 0;
2064}
2065
ad355b46
JG		 2066/**
2067 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2068 * @args: device IDENTIFY data / SCSI command of interest.
2069 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2070 *
2071 * Yields SAT-specified ATA VPD page.
2072 *
2073 * LOCKING:
2074 * spin_lock_irqsave(host lock)
2075 */
87340e98 2076static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2077{
ad355b46 2078 struct ata_taskfile tf;
ad355b46 2079
ad355b46
JG		 2080 memset(&tf, 0, sizeof(tf));
2081
87340e98
TH		 2082 rbuf[1] = 0x89; /* our page code */
2083 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2084 rbuf[3] = (0x238 & 0xff);
ad355b46 2085
87340e98
TH		 2086 memcpy(&rbuf[8], "linux ", 8);
2087 memcpy(&rbuf[16], "libata ", 16);
2088 memcpy(&rbuf[32], DRV_VERSION, 4);
2089 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2090
2091 /* we don't store the ATA device signature, so we fake it */
2092
2093 tf.command = ATA_DRDY; /* really, this is Status reg */
2094 tf.lbal = 0x1;
2095 tf.nsect = 0x1;
2096
87340e98
TH		 2097 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2098 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2099
87340e98 2100 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2101
87340e98 2102 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2103 return 0;
2104}
2105
1e9dbc92
MW		 2106static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2107{
2108 rbuf[1] = 0xb1;
2109 rbuf[3] = 0x3c;
2110 if (ata_id_major_version(args->id) > 7) {
2111 rbuf[4] = args->id[217] >> 8;
2112 rbuf[5] = args->id[217];
2113 rbuf[7] = args->id[168] & 0xf;
2114 }
2115
2116 return 0;
2117}
2118
1da177e4 2119/**
0cba632b 2120 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2121 * @args: device IDENTIFY data / SCSI command of interest.
2122 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2123 *
2124 * No operation. Simply returns success to caller, to indicate
2125 * that the caller should successfully complete this SCSI command.
2126 *
2127 * LOCKING:
cca3974e 2128 * spin_lock_irqsave(host lock)
1da177e4 2129 */
87340e98 2130static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2131{
2132 VPRINTK("ENTER\n");
2133 return 0;
2134}
2135
1da177e4
LT		 2136/**
2137 * ata_msense_caching - Simulate MODE SENSE caching info page
2138 * @id: device IDENTIFY data
87340e98 2139 * @buf: output buffer
1da177e4
LT		 2140 *
2141 * Generate a caching info page, which conditionally indicates
2142 * write caching to the SCSI layer, depending on device
2143 * capabilities.
2144 *
2145 * LOCKING:
2146 * None.
2147 */
87340e98 2148static unsigned int ata_msense_caching(u16 *id, u8 *buf)
1da177e4 2149{
87340e98 2150 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
1da177e4 2151 if (ata_id_wcache_enabled(id))
87340e98 2152 buf[2] |= (1 << 2); /* write cache enable */
1da177e4 2153 if (!ata_id_rahead_enabled(id))
87340e98
TH		 2154 buf[12] |= (1 << 5); /* disable read ahead */
2155 return sizeof(def_cache_mpage);
1da177e4
LT		 2156}
2157
2158/**
2159 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2160 * @buf: output buffer
1da177e4
LT		 2161 *
2162 * Generate a generic MODE SENSE control mode page.
2163 *
2164 * LOCKING:
2165 * None.
2166 */
87340e98 2167static unsigned int ata_msense_ctl_mode(u8 *buf)
1da177e4 2168{
87340e98 2169 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
00ac37f5 2170 return sizeof(def_control_mpage);
1da177e4
LT		 2171}
2172
2173/**
2174 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2175 * @buf: output buffer
1da177e4
LT		 2176 *
2177 * Generate a generic MODE SENSE r/w error recovery page.
2178 *
2179 * LOCKING:
2180 * None.
2181 */
87340e98 2182static unsigned int ata_msense_rw_recovery(u8 *buf)
1da177e4 2183{
87340e98 2184 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
00ac37f5 2185 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2186}
2187
48bdc8ec
JA		 2188/*
2189 * We can turn this into a real blacklist if it's needed, for now just
2190 * blacklist any Maxtor BANC1G10 revision firmware
2191 */
2192static int ata_dev_supports_fua(u16 *id)
2193{
a0cf733b 2194 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2195
c3c013a2
JG		 2196 if (!libata_fua)
2197 return 0;
48bdc8ec
JA		 2198 if (!ata_id_has_fua(id))
2199 return 0;
2200
a0cf733b
TH		 2201 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2202 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2203
2e02671d 2204 if (strcmp(model, "Maxtor"))
48bdc8ec 2205 return 1;
2e02671d 2206 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2207 return 1;
2208
2209 return 0; /* blacklisted */
2210}
2211
1da177e4
LT		 2212/**
2213 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2214 * @args: device IDENTIFY data / SCSI command of interest.
2215 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2216 *
00ac37f5
DG		 2217 * Simulate MODE SENSE commands. Assume this is invoked for direct
2218 * access devices (e.g. disks) only. There should be no block
2219 * descriptor for other device types.
1da177e4
LT		 2220 *
2221 * LOCKING:
cca3974e 2222 * spin_lock_irqsave(host lock)
1da177e4 2223 */
87340e98 2224static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2225{
9a3dccc4 2226 struct ata_device *dev = args->dev;
87340e98 2227 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2228 const u8 sat_blk_desc[] = {
2229 0, 0, 0, 0, /* number of blocks: sat unspecified */
2230 0,
2231 0, 0x2, 0x0 /* block length: 512 bytes */
2232 };
2233 u8 pg, spg;
87340e98 2234 unsigned int ebd, page_control, six_byte;
9a3dccc4 2235 u8 dpofua;
1da177e4
LT		 2236
2237 VPRINTK("ENTER\n");
2238
2239 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2240 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2241 /*
2242 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2243 */
00ac37f5 2244
1da177e4 2245 page_control = scsicmd[2] >> 6;
ae006510
DG		 2246 switch (page_control) {
2247 case 0: /* current */
2248 break; /* supported */
2249 case 3: /* saved */
2250 goto saving_not_supp;
2251 case 1: /* changeable */
2252 case 2: /* defaults */
2253 default:
2254 goto invalid_fld;
2255 }
1da177e4 2256
87340e98
TH		 2257 if (six_byte)
2258 p += 4 + (ebd ? 8 : 0);
2259 else
2260 p += 8 + (ebd ? 8 : 0);
1da177e4 2261
00ac37f5
DG		 2262 pg = scsicmd[2] & 0x3f;
2263 spg = scsicmd[3];
2264 /*
2265 * No mode subpages supported (yet) but asking for _all_
2266 * subpages may be valid
2267 */
2268 if (spg && (spg != ALL_SUB_MPAGES))
2269 goto invalid_fld;
2270
2271 switch(pg) {
2272 case RW_RECOVERY_MPAGE:
87340e98 2273 p += ata_msense_rw_recovery(p);
1da177e4
LT		 2274 break;
2275
00ac37f5 2276 case CACHE_MPAGE:
87340e98 2277 p += ata_msense_caching(args->id, p);
1da177e4
LT		 2278 break;
2279
87340e98
TH		 2280 case CONTROL_MPAGE:
2281 p += ata_msense_ctl_mode(p);
1da177e4 2282 break;
1da177e4 2283
00ac37f5 2284 case ALL_MPAGES:
87340e98
TH		 2285 p += ata_msense_rw_recovery(p);
2286 p += ata_msense_caching(args->id, p);
2287 p += ata_msense_ctl_mode(p);
1da177e4
LT		 2288 break;
2289
2290 default: /* invalid page code */
ae006510 2291 goto invalid_fld;
1da177e4
LT		 2292 }
2293
9a3dccc4 2294 dpofua = 0;
f79d409f 2295 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2296 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2297 dpofua = 1 << 4;
2298
1da177e4 2299 if (six_byte) {
87340e98
TH		 2300 rbuf[0] = p - rbuf - 1;
2301 rbuf[2] |= dpofua;
00ac37f5 2302 if (ebd) {
87340e98
TH		 2303 rbuf[3] = sizeof(sat_blk_desc);
2304 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2305 }
1da177e4 2306 } else {
87340e98
TH		 2307 unsigned int output_len = p - rbuf - 2;
2308
1da177e4 2309 rbuf[0] = output_len >> 8;
87340e98
TH		 2310 rbuf[1] = output_len;
2311 rbuf[3] |= dpofua;
00ac37f5 2312 if (ebd) {
87340e98
TH		 2313 rbuf[7] = sizeof(sat_blk_desc);
2314 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2315 }
1da177e4 2316 }
1da177e4 2317 return 0;
ae006510
DG		 2318
2319invalid_fld:
2320 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2321 /* "Invalid field in cbd" */
2322 return 1;
2323
2324saving_not_supp:
2325 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2326 /* "Saving parameters not supported" */
2327 return 1;
1da177e4
LT		 2328}
2329
2330/**
2331 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2332 * @args: device IDENTIFY data / SCSI command of interest.
2333 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2334 *
2335 * Simulate READ CAPACITY commands.
2336 *
2337 * LOCKING:
6a36261e 2338 * None.
1da177e4 2339 */
87340e98 2340static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2341{
6a36261e 2342 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2343
2344 VPRINTK("ENTER\n");
2345
1da177e4 2346 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2347 if (last_lba >= 0xffffffffULL)
2348 last_lba = 0xffffffff;
0c144d0d 2349
1da177e4 2350 /* sector count, 32-bit */
87340e98
TH		 2351 rbuf[0] = last_lba >> (8 * 3);
2352 rbuf[1] = last_lba >> (8 * 2);
2353 rbuf[2] = last_lba >> (8 * 1);
2354 rbuf[3] = last_lba;
1da177e4
LT		 2355
2356 /* sector size */
87340e98
TH		 2357 rbuf[6] = ATA_SECT_SIZE >> 8;
2358 rbuf[7] = ATA_SECT_SIZE & 0xff;
1da177e4
LT		 2359 } else {
2360 /* sector count, 64-bit */
87340e98
TH		 2361 rbuf[0] = last_lba >> (8 * 7);
2362 rbuf[1] = last_lba >> (8 * 6);
2363 rbuf[2] = last_lba >> (8 * 5);
2364 rbuf[3] = last_lba >> (8 * 4);
2365 rbuf[4] = last_lba >> (8 * 3);
2366 rbuf[5] = last_lba >> (8 * 2);
2367 rbuf[6] = last_lba >> (8 * 1);
2368 rbuf[7] = last_lba;
1da177e4
LT		 2369
2370 /* sector size */
87340e98
TH		 2371 rbuf[10] = ATA_SECT_SIZE >> 8;
2372 rbuf[11] = ATA_SECT_SIZE & 0xff;
1da177e4
LT		 2373 }
2374
2375 return 0;
2376}
2377
2378/**
2379 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2380 * @args: device IDENTIFY data / SCSI command of interest.
2381 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2382 *
2383 * Simulate REPORT LUNS command.
2384 *
2385 * LOCKING:
cca3974e 2386 * spin_lock_irqsave(host lock)
1da177e4 2387 */
87340e98 2388static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2389{
2390 VPRINTK("ENTER\n");
2391 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2392
2393 return 0;
2394}
2395
77853bf2 2396static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2397{
74e6c8c3 2398 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2399 /* FIXME: not quite right; we don't want the
2400 * translation of taskfile registers into
2401 * a sense descriptors, since that's only
2402 * correct for ATA, not ATAPI
2403 */
750426aa 2404 ata_gen_passthru_sense(qc);
74e6c8c3 2405 }
a939c963 2406
c6e6e666 2407 qc->scsidone(qc->scsicmd);
77853bf2 2408 ata_qc_free(qc);
c6e6e666 2409}
a939c963 2410
c6e6e666
JG		 2411/* is it pointless to prefer PIO for "safety reasons"? */
2412static inline int ata_pio_use_silly(struct ata_port *ap)
2413{
2414 return (ap->flags & ATA_FLAG_PIO_DMA);
2415}
2416
2417static void atapi_request_sense(struct ata_queued_cmd *qc)
2418{
2419 struct ata_port *ap = qc->ap;
2420 struct scsi_cmnd *cmd = qc->scsicmd;
2421
2422 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2423
2424 /* FIXME: is this needed? */
7ccd720d 2425 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2426
127102ae 2427#ifdef CONFIG_ATA_SFF
855d854a
JB		 2428 if (ap->ops->sff_tf_read)
2429 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2430#endif
c6e6e666
JG		 2431
2432 /* fill these in, for the case where they are -not- overwritten */
2433 cmd->sense_buffer[0] = 0x70;
2434 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2435
2436 ata_qc_reinit(qc);
2437
93f8fecb 2438 /* setup sg table and init transfer direction */
cadb7345 2439 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2440 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2441 qc->dma_dir = DMA_FROM_DEVICE;
2442
6e7846e9 2443 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2444 qc->cdb[0] = REQUEST_SENSE;
2445 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2446
2447 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2448 qc->tf.command = ATA_CMD_PACKET;
2449
c6e6e666 2450 if (ata_pio_use_silly(ap)) {
0dc36888 2451 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2452 qc->tf.feature |= ATAPI_PKT_DMA;
2453 } else {
0dc36888 2454 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2455 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2456 qc->tf.lbah = 0;
c6e6e666 2457 }
a939c963
JG		 2458 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2459
c6e6e666 2460 qc->complete_fn = atapi_sense_complete;
a939c963 2461
8e0e694a 2462 ata_qc_issue(qc);
a939c963
JG		 2463
2464 DPRINTK("EXIT\n");
2465}
2466
77853bf2 2467static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2468{
2469 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2470 unsigned int err_mask = qc->err_mask;
1da177e4 2471
a7dac447 2472 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2473
246619da
TH		 2474 /* handle completion from new EH */
2475 if (unlikely(qc->ap->ops->error_handler &&
2476 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2477
2478 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2479 /* FIXME: not quite right; we don't want the
2480 * translation of taskfile registers into a
2481 * sense descriptors, since that's only
2482 * correct for ATA, not ATAPI
2483 */
750426aa 2484 ata_gen_passthru_sense(qc);
246619da
TH		 2485 }
2486
22aac089
TH		 2487 /* SCSI EH automatically locks door if sdev->locked is
2488 * set. Sometimes door lock request continues to
2489 * fail, for example, when no media is present. This
2490 * creates a loop - SCSI EH issues door lock which
2491 * fails and gets invoked again to acquire sense data
2492 * for the failed command.
2493 *
2494 * If door lock fails, always clear sdev->locked to
2495 * avoid this infinite loop.
2496 */
2497 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2498 qc->dev->sdev->locked = 0;
2499
246619da
TH		 2500 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2501 qc->scsidone(cmd);
2502 ata_qc_free(qc);
2503 return;
2504 }
2505
2506 /* successful completion or old EH failure path */
a7dac447 2507 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2508 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2509 atapi_request_sense(qc);
77853bf2 2510 return;
74e6c8c3 2511 } else if (unlikely(err_mask)) {
a7dac447
JG		 2512 /* FIXME: not quite right; we don't want the
2513 * translation of taskfile registers into
2514 * a sense descriptors, since that's only
2515 * correct for ATA, not ATAPI
2516 */
750426aa 2517 ata_gen_passthru_sense(qc);
74e6c8c3 2518 } else {
1da177e4
LT		 2519 u8 *scsicmd = cmd->cmnd;
2520
fd71da46 2521 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2522 unsigned long flags;
87340e98 2523 u8 *buf;
b445c568 2524
87340e98 2525 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2526
2527 /* ATAPI devices typically report zero for their SCSI version,
2528 * and sometimes deviate from the spec WRT response data
2529 * format. If SCSI version is reported as zero like normal,
2530 * then we make the following fixups: 1) Fake MMC-5 version,
2531 * to indicate to the Linux scsi midlayer this is a modern
2532 * device. 2) Ensure response data format / ATAPI information
2533 * are always correct.
a15dbeb4
JG		 2534 */
2535 if (buf[2] == 0) {
2536 buf[2] = 0x5;
2537 buf[3] = 0x32;
2538 }
2539
87340e98 2540 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2541 }
a15dbeb4 2542
1da177e4
LT		 2543 cmd->result = SAM_STAT_GOOD;
2544 }
2545
2546 qc->scsidone(cmd);
77853bf2 2547 ata_qc_free(qc);
1da177e4
LT		 2548}
2549/**
2550 * atapi_xlat - Initialize PACKET taskfile
2551 * @qc: command structure to be initialized
1da177e4
LT		 2552 *
2553 * LOCKING:
cca3974e 2554 * spin_lock_irqsave(host lock)
1da177e4
LT		 2555 *
2556 * RETURNS:
2557 * Zero on success, non-zero on failure.
2558 */
ad706991 2559static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2560{
542b1444 2561 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2562 struct ata_device *dev = qc->dev;
542b1444 2563 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2564 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2565 unsigned int nbytes;
1da177e4 2566
2e5704f6
TH		 2567 memset(qc->cdb, 0, dev->cdb_len);
2568 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2569
2570 qc->complete_fn = atapi_qc_complete;
2571
2572 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2573 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2574 qc->tf.flags |= ATA_TFLAG_WRITE;
2575 DPRINTK("direction: write\n");
2576 }
2577
2578 qc->tf.command = ATA_CMD_PACKET;
aacda375 2579 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2580
2581 /* check whether ATAPI DMA is safe */
5895ef9a 2582 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2583 using_pio = 1;
1da177e4 2584
e190222d
TH		 2585 /* Some controller variants snoop this value for Packet
2586 * transfers to do state machine and FIFO management. Thus we
2587 * want to set it properly, and for DMA where it is
2588 * effectively meaningless.
2589 */
aacda375 2590 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2591
e190222d
TH		 2592 /* Most ATAPI devices which honor transfer chunk size don't
2593 * behave according to the spec when odd chunk size which
2594 * matches the transfer length is specified. If the number of
2595 * bytes to transfer is 2n+1. According to the spec, what
2596 * should happen is to indicate that 2n+1 is going to be
2597 * transferred and transfer 2n+2 bytes where the last byte is
2598 * padding.
2599 *
2600 * In practice, this doesn't happen. ATAPI devices first
2601 * indicate and transfer 2n bytes and then indicate and
2602 * transfer 2 bytes where the last byte is padding.
2603 *
2604 * This inconsistency confuses several controllers which
2605 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2606 * These controllers use actual number of transferred bytes to
2607 * update DMA poitner and transfer of 4n+2 bytes make those
2608 * controller push DMA pointer by 4n+4 bytes because SATA data
2609 * FISes are aligned to 4 bytes. This causes data corruption
2610 * and buffer overrun.
2611 *
2612 * Always setting nbytes to even number solves this problem
2613 * because then ATAPI devices don't have to split data at 2n
2614 * boundaries.
2615 */
2616 if (nbytes & 0x1)
2617 nbytes++;
2618
2db78dd3
AC		 2619 qc->tf.lbam = (nbytes & 0xFF);
2620 qc->tf.lbah = (nbytes >> 8);
2621
5895ef9a
TH		 2622 if (nodata)
2623 qc->tf.protocol = ATAPI_PROT_NODATA;
2624 else if (using_pio)
2625 qc->tf.protocol = ATAPI_PROT_PIO;
2626 else {
e00f1ff3 2627 /* DMA data xfer */
0dc36888 2628 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2629 qc->tf.feature |= ATAPI_PKT_DMA;
2630
91163006
TH		 2631 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2632 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2633 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2634 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2635 }
2636
2db78dd3
AC		 2637
2638 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2639 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2640 return 0;
2641}
2642
2dcb407e 2643static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2644{
071f44b1 2645 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2646 if (likely(devno < ata_link_max_devices(&ap->link)))
2647 return &ap->link.device[devno];
2648 } else {
2649 if (likely(devno < ap->nr_pmp_links))
2650 return &ap->pmp_link[devno].device[0];
2651 }
2652
ab5b3a5b
TH		 2653 return NULL;
2654}
2655
2dcb407e
JG		 2656static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2657 const struct scsi_device *scsidev)
ab5b3a5b 2658{
41bda9c9
TH		 2659 int devno;
2660
ab5b3a5b 2661 /* skip commands not addressed to targets we simulate */
071f44b1 2662 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2663 if (unlikely(scsidev->channel || scsidev->lun))
2664 return NULL;
2665 devno = scsidev->id;
2666 } else {
2667 if (unlikely(scsidev->id || scsidev->lun))
2668 return NULL;
2669 devno = scsidev->channel;
2670 }
ab5b3a5b 2671
41bda9c9 2672 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2673}
2674
1da177e4
LT		 2675/**
2676 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2677 * @ap: ATA port to which the device is attached
2678 * @scsidev: SCSI device from which we derive the ATA device
2679 *
2680 * Given various information provided in struct scsi_cmnd,
2681 * map that onto an ATA bus, and using that mapping
2682 * determine which ata_device is associated with the
2683 * SCSI command to be sent.
2684 *
2685 * LOCKING:
cca3974e 2686 * spin_lock_irqsave(host lock)
1da177e4
LT		 2687 *
2688 * RETURNS:
2689 * Associated ATA device, or %NULL if not found.
2690 */
1da177e4 2691static struct ata_device *
057ace5e 2692ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2693{
ab5b3a5b 2694 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2695
2486fa56 2696 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2697 return NULL;
2698
1da177e4
LT		 2699 return dev;
2700}
2701
b095518e
JG		 2702/*
2703 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2704 * @byte1: Byte 1 from pass-thru CDB.
2705 *
2706 * RETURNS:
2707 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2708 */
2709static u8
2710ata_scsi_map_proto(u8 byte1)
2711{
2712 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2713 case 3: /* Non-data */
2714 return ATA_PROT_NODATA;
2715
2716 case 6: /* DMA */
2717 case 10: /* UDMA Data-in */
2718 case 11: /* UDMA Data-Out */
2719 return ATA_PROT_DMA;
2720
2721 case 4: /* PIO Data-in */
2722 case 5: /* PIO Data-out */
2723 return ATA_PROT_PIO;
2724
2725 case 0: /* Hard Reset */
2726 case 1: /* SRST */
2727 case 8: /* Device Diagnostic */
2728 case 9: /* Device Reset */
2729 case 7: /* DMA Queued */
2730 case 12: /* FPDMA */
2731 case 15: /* Return Response Info */
2732 default: /* Reserved */
2733 break;
b095518e
JG		 2734 }
2735
2736 return ATA_PROT_UNKNOWN;
2737}
2738
2739/**
2740 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2741 * @qc: command structure to be initialized
b095518e
JG		 2742 *
2743 * Handles either 12 or 16-byte versions of the CDB.
2744 *
2745 * RETURNS:
2746 * Zero on success, non-zero on failure.
2747 */
ad706991 2748static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2749{
2750 struct ata_taskfile *tf = &(qc->tf);
542b1444 2751 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2752 struct ata_device *dev = qc->dev;
ad706991 2753 const u8 *cdb = scmd->cmnd;
b095518e 2754
542b1444 2755 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2756 goto invalid_fld;
8190bdb9 2757
ae8d4ee7
AC		 2758 /*
2759 * Filter TPM commands by default. These provide an
2760 * essentially uncontrolled encrypted "back door" between
2761 * applications and the disk. Set libata.allow_tpm=1 if you
2762 * have a real reason for wanting to use them. This ensures
2763 * that installed software cannot easily mess stuff up without
2764 * user intent. DVR type users will probably ship with this enabled
2765 * for movie content management.
2766 *
2767 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2768 * for this and should do in future but that it is not sufficient as
2769 * DCS is an optional feature set. Thus we also do the software filter
2770 * so that we comply with the TC consortium stated goal that the user
2771 * can turn off TC features of their system.
2772 */
2773 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2774 goto invalid_fld;
2775
f79d409f
AC		 2776 /* We may not issue DMA commands if no DMA mode is set */
2777 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2778 goto invalid_fld;
b095518e
JG		 2779
2780 /*
2781 * 12 and 16 byte CDBs use different offsets to
2782 * provide the various register values.
2783 */
542b1444 2784 if (cdb[0] == ATA_16) {
b095518e
JG		 2785 /*
2786 * 16-byte CDB - may contain extended commands.
2787 *
2788 * If that is the case, copy the upper byte register values.
2789 */
542b1444
TH		 2790 if (cdb[1] & 0x01) {
2791 tf->hob_feature = cdb[3];
2792 tf->hob_nsect = cdb[5];
2793 tf->hob_lbal = cdb[7];
2794 tf->hob_lbam = cdb[9];
2795 tf->hob_lbah = cdb[11];
b095518e
JG		 2796 tf->flags |= ATA_TFLAG_LBA48;
2797 } else
2798 tf->flags &= ~ATA_TFLAG_LBA48;
2799
2800 /*
2801 * Always copy low byte, device and command registers.
2802 */
542b1444
TH		 2803 tf->feature = cdb[4];
2804 tf->nsect = cdb[6];
2805 tf->lbal = cdb[8];
2806 tf->lbam = cdb[10];
2807 tf->lbah = cdb[12];
2808 tf->device = cdb[13];
2809 tf->command = cdb[14];
b095518e
JG		 2810 } else {
2811 /*
2812 * 12-byte CDB - incapable of extended commands.
2813 */
2814 tf->flags &= ~ATA_TFLAG_LBA48;
2815
542b1444
TH		 2816 tf->feature = cdb[3];
2817 tf->nsect = cdb[4];
2818 tf->lbal = cdb[5];
2819 tf->lbam = cdb[6];
2820 tf->lbah = cdb[7];
2821 tf->device = cdb[8];
2822 tf->command = cdb[9];
b095518e 2823 }
fa4453c4
AL		 2824
2825 /* enforce correct master/slave bit */
2826 tf->device = dev->devno ?
2827 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2828
1dce589c
AL		 2829 /* sanity check for pio multi commands */
2830 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2831 goto invalid_fld;
2832
2833 if (is_multi_taskfile(tf)) {
2834 unsigned int multi_count = 1 << (cdb[1] >> 5);
2835
2836 /* compare the passed through multi_count
2837 * with the cached multi_count of libata
2838 */
2839 if (multi_count != dev->multi_count)
2840 ata_dev_printk(dev, KERN_WARNING,
2841 "invalid multi_count %u ignored\n",
2842 multi_count);
d26fc955 2843 }
1dce589c 2844
5a5dbd18
ML		 2845 /* READ/WRITE LONG use a non-standard sect_size */
2846 qc->sect_size = ATA_SECT_SIZE;
2847 switch (tf->command) {
2848 case ATA_CMD_READ_LONG:
2849 case ATA_CMD_READ_LONG_ONCE:
2850 case ATA_CMD_WRITE_LONG:
2851 case ATA_CMD_WRITE_LONG_ONCE:
2852 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2853 goto invalid_fld;
7120165c 2854 qc->sect_size = scsi_bufflen(scmd);
5a5dbd18
ML		 2855 }
2856
b095518e
JG		 2857 /*
2858 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2859 * SET_FEATURES - XFER MODE must be preceded/succeeded
2860 * by an update to hardware-specific registers for each
2861 * controller (i.e. the reason for ->set_piomode(),
2862 * ->set_dmamode(), and ->post_set_mode() hooks).
2863 */
2864 if ((tf->command == ATA_CMD_SET_FEATURES)
2865 && (tf->feature == SETFEATURES_XFER))
9a405257 2866 goto invalid_fld;
b095518e
JG		 2867
2868 /*
2869 * Set flags so that all registers will be written,
2870 * and pass on write indication (used for PIO/DMA
2871 * setup.)
2872 */
2873 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2874
542b1444 2875 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2876 tf->flags |= ATA_TFLAG_WRITE;
2877
2878 /*
2879 * Set transfer length.
2880 *
2881 * TODO: find out if we need to do more here to
2882 * cover scatter/gather case.
2883 */
aacda375 2884 ata_qc_set_pc_nbytes(qc);
b095518e 2885
e027bd36
TH		 2886 /* request result TF and be quiet about device error */
2887 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
e61e0672 2888
b095518e 2889 return 0;
9a405257
TH		 2890
2891 invalid_fld:
542b1444 2892 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2893 /* "Invalid field in cdb" */
2894 return 1;
b095518e
JG		 2895}
2896
1da177e4
LT		 2897/**
2898 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2899 * @dev: ATA device
2900 * @cmd: SCSI command opcode to consider
2901 *
2902 * Look up the SCSI command given, and determine whether the
2903 * SCSI command is to be translated or simulated.
2904 *
2905 * RETURNS:
2906 * Pointer to translation function if possible, %NULL if not.
2907 */
2908
2909static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2910{
2911 switch (cmd) {
2912 case READ_6:
2913 case READ_10:
2914 case READ_16:
2915
2916 case WRITE_6:
2917 case WRITE_10:
2918 case WRITE_16:
2919 return ata_scsi_rw_xlat;
2920
2921 case SYNCHRONIZE_CACHE:
2922 if (ata_try_flush_cache(dev))
2923 return ata_scsi_flush_xlat;
2924 break;
2925
2926 case VERIFY:
2927 case VERIFY_16:
2928 return ata_scsi_verify_xlat;
b095518e
JG		 2929
2930 case ATA_12:
2931 case ATA_16:
2932 return ata_scsi_pass_thru;
da61396d 2933
972dcafb
DG		 2934 case START_STOP:
2935 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2936 }
2937
2938 return NULL;
2939}
2940
2941/**
2942 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2943 * @ap: ATA port to which the command was being sent
2944 * @cmd: SCSI command to dump
2945 *
2946 * Prints the contents of a SCSI command via printk().
2947 */
2948
2949static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2950 struct scsi_cmnd *cmd)
2951{
2952#ifdef ATA_DEBUG
2953 struct scsi_device *scsidev = cmd->device;
2954 u8 *scsicmd = cmd->cmnd;
2955
2956 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2957 ap->print_id,
1da177e4
LT		 2958 scsidev->channel, scsidev->id, scsidev->lun,
2959 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2960 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2961 scsicmd[8]);
2962#endif
2963}
2964
542b1444 2965static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 2966 void (*done)(struct scsi_cmnd *),
2967 struct ata_device *dev)
eb3f0f9c 2968{
baf4fdfa
ML		 2969 u8 scsi_op = scmd->cmnd[0];
2970 ata_xlat_func_t xlat_func;
2115ea94
TH		 2971 int rc = 0;
2972
eb3f0f9c 2973 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 2974 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2975 goto bad_cdb_len;
eb3f0f9c 2976
baf4fdfa
ML		 2977 xlat_func = ata_get_xlat_func(dev, scsi_op);
2978 } else {
2979 if (unlikely(!scmd->cmd_len))
2980 goto bad_cdb_len;
2981
2982 xlat_func = NULL;
2983 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2984 /* relay SCSI command to ATAPI device */
607126c2
ML		 2985 int len = COMMAND_SIZE(scsi_op);
2986 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 2987 goto bad_cdb_len;
2988
2989 xlat_func = atapi_xlat;
2990 } else {
2991 /* ATA_16 passthru, treat as an ATA command */
2992 if (unlikely(scmd->cmd_len > 16))
2993 goto bad_cdb_len;
2994
2995 xlat_func = ata_get_xlat_func(dev, scsi_op);
2996 }
2997 }
2998
2999 if (xlat_func)
3000 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3001 else
3002 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 3003
3004 return rc;
baf4fdfa
ML		 3005
3006 bad_cdb_len:
3007 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3008 scmd->cmd_len, scsi_op, dev->cdb_len);
3009 scmd->result = DID_ERROR << 16;
3010 done(scmd);
3011 return 0;
eb3f0f9c
BK		 3012}
3013
1da177e4
LT		 3014/**
3015 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3016 * @cmd: SCSI command to be sent
3017 * @done: Completion function, called when command is complete
3018 *
3019 * In some cases, this function translates SCSI commands into
3020 * ATA taskfiles, and queues the taskfiles to be sent to
3021 * hardware. In other cases, this function simulates a
3022 * SCSI device by evaluating and responding to certain
3023 * SCSI commands. This creates the overall effect of
3024 * ATA and ATAPI devices appearing as SCSI devices.
3025 *
3026 * LOCKING:
cca3974e 3027 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 3028 *
3029 * RETURNS:
2115ea94
TH		 3030 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3031 * 0 otherwise.
1da177e4 3032 */
1da177e4
LT		 3033int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3034{
3035 struct ata_port *ap;
3036 struct ata_device *dev;
3037 struct scsi_device *scsidev = cmd->device;
005a5a06 3038 struct Scsi_Host *shost = scsidev->host;
2115ea94 3039 int rc = 0;
1da177e4 3040
35bb94b1 3041 ap = ata_shost_to_port(shost);
005a5a06
JG		 3042
3043 spin_unlock(shost->host_lock);
ba6a1308 3044 spin_lock(ap->lock);
1da177e4
LT		 3045
3046 ata_scsi_dump_cdb(ap, cmd);
3047
3048 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3049 if (likely(dev))
2115ea94 3050 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 3051 else {
1da177e4
LT		 3052 cmd->result = (DID_BAD_TARGET << 16);
3053 done(cmd);
1da177e4
LT		 3054 }
3055
ba6a1308 3056 spin_unlock(ap->lock);
005a5a06 3057 spin_lock(shost->host_lock);
2115ea94 3058 return rc;
1da177e4
LT		 3059}
3060
3061/**
3062 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3063 * @dev: the target device
1da177e4
LT		 3064 * @cmd: SCSI command being sent to device.
3065 * @done: SCSI command completion function.
3066 *
3067 * Interprets and directly executes a select list of SCSI commands
3068 * that can be handled internally.
3069 *
3070 * LOCKING:
cca3974e 3071 * spin_lock_irqsave(host lock)
1da177e4
LT		 3072 */
3073
3373efd8 3074void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 3075 void (*done)(struct scsi_cmnd *))
3076{
3077 struct ata_scsi_args args;
057ace5e 3078 const u8 *scsicmd = cmd->cmnd;
45394145 3079 u8 tmp8;
1da177e4 3080
9a3dccc4
TH		 3081 args.dev = dev;
3082 args.id = dev->id;
1da177e4
LT		 3083 args.cmd = cmd;
3084 args.done = done;
3085
3086 switch(scsicmd[0]) {
2dcb407e
JG		 3087 /* TODO: worth improving? */
3088 case FORMAT_UNIT:
3089 ata_scsi_invalid_field(cmd, done);
3090 break;
3091
3092 case INQUIRY:
3093 if (scsicmd[1] & 2) /* is CmdDt set? */
00bd0202 3094 ata_scsi_invalid_field(cmd, done);
2dcb407e
JG		 3095 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3096 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3097 else switch (scsicmd[2]) {
3098 case 0x00:
3099 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3100 break;
2dcb407e
JG		 3101 case 0x80:
3102 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3103 break;
2dcb407e
JG		 3104 case 0x83:
3105 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3106 break;
2dcb407e
JG		 3107 case 0x89:
3108 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3109 break;
1e9dbc92
MW		 3110 case 0xb1:
3111 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3112 break;
2dcb407e 3113 default:
ae006510 3114 ata_scsi_invalid_field(cmd, done);
1da177e4 3115 break;
2dcb407e
JG		 3116 }
3117 break;
3118
3119 case MODE_SENSE:
3120 case MODE_SENSE_10:
3121 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3122 break;
3123
3124 case MODE_SELECT: /* unconditionally return */
3125 case MODE_SELECT_10: /* bad-field-in-cdb */
3126 ata_scsi_invalid_field(cmd, done);
3127 break;
1da177e4 3128
2dcb407e
JG		 3129 case READ_CAPACITY:
3130 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3131 break;
3132
3133 case SERVICE_ACTION_IN:
3134 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3135 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e
JG		 3136 else
3137 ata_scsi_invalid_field(cmd, done);
3138 break;
1da177e4 3139
2dcb407e
JG		 3140 case REPORT_LUNS:
3141 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3142 break;
1da177e4 3143
2dcb407e
JG		 3144 case REQUEST_SENSE:
3145 ata_scsi_set_sense(cmd, 0, 0, 0);
3146 cmd->result = (DRIVER_SENSE << 24);
3147 done(cmd);
3148 break;
1da177e4 3149
2dcb407e
JG		 3150 /* if we reach this, then writeback caching is disabled,
3151 * turning this into a no-op.
3152 */
3153 case SYNCHRONIZE_CACHE:
3154 /* fall through */
3155
3156 /* no-op's, complete with success */
3157 case REZERO_UNIT:
3158 case SEEK_6:
3159 case SEEK_10:
3160 case TEST_UNIT_READY:
3161 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3162 break;
45394145 3163
2dcb407e
JG		 3164 case SEND_DIAGNOSTIC:
3165 tmp8 = scsicmd[1] & ~(1 << 3);
3166 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3167 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e
JG		 3168 else
3169 ata_scsi_invalid_field(cmd, done);
3170 break;
1da177e4 3171
2dcb407e
JG		 3172 /* all other commands */
3173 default:
3174 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3175 /* "Invalid command operation code" */
3176 done(cmd);
3177 break;
1da177e4
LT		 3178 }
3179}
3180
f3187195
TH		 3181int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3182{
3183 int i, rc;
3184
3185 for (i = 0; i < host->n_ports; i++) {
3186 struct ata_port *ap = host->ports[i];
3187 struct Scsi_Host *shost;
3188
3189 rc = -ENOMEM;
3190 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3191 if (!shost)
3192 goto err_alloc;
3193
3194 *(struct ata_port **)&shost->hostdata[0] = ap;
3195 ap->scsi_host = shost;
3196
3197 shost->transportt = &ata_scsi_transport_template;
3198 shost->unique_id = ap->print_id;
3199 shost->max_id = 16;
3200 shost->max_lun = 1;
3201 shost->max_channel = 1;
3202 shost->max_cmd_len = 16;
3203
31cc23b3
TH		 3204 /* Schedule policy is determined by ->qc_defer()
3205 * callback and it needs to see every deferred qc.
3206 * Set host_blocked to 1 to prevent SCSI midlayer from
3207 * automatically deferring requests.
3208 */
3209 shost->max_host_blocked = 1;
3210
f3187195
TH		 3211 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3212 if (rc)
3213 goto err_add;
3214 }
3215
3216 return 0;
3217
3218 err_add:
3219 scsi_host_put(host->ports[i]->scsi_host);
3220 err_alloc:
3221 while (--i >= 0) {
3222 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3223
3224 scsi_remove_host(shost);
3225 scsi_host_put(shost);
3226 }
3227 return rc;
3228}
3229
1ae46317 3230void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3231{
1ae46317
TH		 3232 int tries = 5;
3233 struct ata_device *last_failed_dev = NULL;
41bda9c9 3234 struct ata_link *link;
1ae46317 3235 struct ata_device *dev;
644dd0cc 3236
198e0fed 3237 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 3238 return;
3239
1ae46317 3240 repeat:
1eca4365
TH		 3241 ata_for_each_link(link, ap, EDGE) {
3242 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3243 struct scsi_device *sdev;
3244 int channel = 0, id = 0;
3edebac4 3245
1eca4365 3246 if (dev->sdev)
41bda9c9 3247 continue;
3f19ee8c 3248
41bda9c9
TH		 3249 if (ata_is_host_link(link))
3250 id = dev->devno;
3251 else
3252 channel = link->pmp;
3253
3254 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3255 NULL);
3256 if (!IS_ERR(sdev)) {
3257 dev->sdev = sdev;
3258 scsi_device_put(sdev);
3259 }
3edebac4 3260 }
3f19ee8c 3261 }
1ae46317
TH		 3262
3263 /* If we scanned while EH was in progress or allocation
3264 * failure occurred, scan would have failed silently. Check
3265 * whether all devices are attached.
3266 */
1eca4365
TH		 3267 ata_for_each_link(link, ap, EDGE) {
3268 ata_for_each_dev(dev, link, ENABLED) {
3269 if (!dev->sdev)
41bda9c9
TH		 3270 goto exit_loop;
3271 }
1ae46317 3272 }
41bda9c9
TH		 3273 exit_loop:
3274 if (!link)
1ae46317
TH		 3275 return;
3276
3277 /* we're missing some SCSI devices */
3278 if (sync) {
3279 /* If caller requested synchrnous scan && we've made
3280 * any progress, sleep briefly and repeat.
3281 */
3282 if (dev != last_failed_dev) {
3283 msleep(100);
3284 last_failed_dev = dev;
3285 goto repeat;
3286 }
3287
3288 /* We might be failing to detect boot device, give it
3289 * a few more chances.
3290 */
3291 if (--tries) {
3292 msleep(100);
3293 goto repeat;
3294 }
3295
3296 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3297 "failed without making any progress,\n"
3298 " switching to async\n");
3299 }
3300
3301 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3302 round_jiffies_relative(HZ));
644dd0cc 3303}
0ea035a3
TH		 3304
3305/**
3306 * ata_scsi_offline_dev - offline attached SCSI device
3307 * @dev: ATA device to offline attached SCSI device for
3308 *
3309 * This function is called from ata_eh_hotplug() and responsible
3310 * for taking the SCSI device attached to @dev offline. This
cca3974e 3311 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3312 * against clearing.
3313 *
3314 * LOCKING:
cca3974e 3315 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3316 *
3317 * RETURNS:
3318 * 1 if attached SCSI device exists, 0 otherwise.
3319 */
3320int ata_scsi_offline_dev(struct ata_device *dev)
3321{
3322 if (dev->sdev) {
3323 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3324 return 1;
3325 }
3326 return 0;
3327}
580b2102
TH		 3328
3329/**
3330 * ata_scsi_remove_dev - remove attached SCSI device
3331 * @dev: ATA device to remove attached SCSI device for
3332 *
3333 * This function is called from ata_eh_scsi_hotplug() and
3334 * responsible for removing the SCSI device attached to @dev.
3335 *
3336 * LOCKING:
3337 * Kernel thread context (may sleep).
3338 */
3339static void ata_scsi_remove_dev(struct ata_device *dev)
3340{
9af5c9c9 3341 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3342 struct scsi_device *sdev;
3343 unsigned long flags;
3344
3345 /* Alas, we need to grab scan_mutex to ensure SCSI device
3346 * state doesn't change underneath us and thus
3347 * scsi_device_get() always succeeds. The mutex locking can
3348 * be removed if there is __scsi_device_get() interface which
3349 * increments reference counts regardless of device state.
3350 */
cca3974e 3351 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3352 spin_lock_irqsave(ap->lock, flags);
580b2102 3353
cca3974e 3354 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3355 sdev = dev->sdev;
3356 dev->sdev = NULL;
3357
3358 if (sdev) {
3359 /* If user initiated unplug races with us, sdev can go
cca3974e 3360 * away underneath us after the host lock and
580b2102
TH		 3361 * scan_mutex are released. Hold onto it.
3362 */
3363 if (scsi_device_get(sdev) == 0) {
3364 /* The following ensures the attached sdev is
3365 * offline on return from ata_scsi_offline_dev()
3366 * regardless it wins or loses the race
3367 * against this function.
3368 */
3369 scsi_device_set_state(sdev, SDEV_OFFLINE);
3370 } else {
3371 WARN_ON(1);
3372 sdev = NULL;
3373 }
3374 }
3375
ba6a1308 3376 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3377 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3378
3379 if (sdev) {
3380 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
b9d5fc41 3381 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3382
3383 scsi_remove_device(sdev);
3384 scsi_device_put(sdev);
3385 }
3386}
3387
41bda9c9
TH		 3388static void ata_scsi_handle_link_detach(struct ata_link *link)
3389{
3390 struct ata_port *ap = link->ap;
3391 struct ata_device *dev;
3392
1eca4365 3393 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3394 unsigned long flags;
3395
3396 if (!(dev->flags & ATA_DFLAG_DETACHED))
3397 continue;
3398
3399 spin_lock_irqsave(ap->lock, flags);
3400 dev->flags &= ~ATA_DFLAG_DETACHED;
3401 spin_unlock_irqrestore(ap->lock, flags);
3402
3403 ata_scsi_remove_dev(dev);
3404 }
3405}
3406
2f294968
KCA		 3407/**
3408 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3409 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3410 *
3411 * Tell the block layer to send a media change notification
3412 * event.
3413 *
3414 * LOCKING:
854c73a2 3415 * spin_lock_irqsave(host lock)
2f294968 3416 */
854c73a2 3417void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3418{
854c73a2 3419 if (dev->sdev)
f26792d5
JG		 3420 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3421 GFP_ATOMIC);
2f294968 3422}
2f294968 3423
580b2102
TH		 3424/**
3425 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3426 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3427 *
3428 * Perform SCSI part of hotplug. It's executed from a separate
3429 * workqueue after EH completes. This is necessary because SCSI
3430 * hot plugging requires working EH and hot unplugging is
3431 * synchronized with hot plugging with a mutex.
3432 *
3433 * LOCKING:
3434 * Kernel thread context (may sleep).
3435 */
65f27f38 3436void ata_scsi_hotplug(struct work_struct *work)
580b2102 3437{
65f27f38
DH		 3438 struct ata_port *ap =
3439 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3440 int i;
580b2102 3441
b51e9e5d 3442 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3443 DPRINTK("ENTER/EXIT - unloading\n");
3444 return;
3445 }
3446
3447 DPRINTK("ENTER\n");
3448
41bda9c9
TH		 3449 /* Unplug detached devices. We cannot use link iterator here
3450 * because PMP links have to be scanned even if PMP is
3451 * currently not attached. Iterate manually.
3452 */
3453 ata_scsi_handle_link_detach(&ap->link);
3454 if (ap->pmp_link)
3455 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3456 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3457
3458 /* scan for new ones */
1ae46317 3459 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3460
3461 DPRINTK("EXIT\n");
3462}
83c47bcb
TH		 3463
3464/**
3465 * ata_scsi_user_scan - indication for user-initiated bus scan
3466 * @shost: SCSI host to scan
3467 * @channel: Channel to scan
3468 * @id: ID to scan
3469 * @lun: LUN to scan
3470 *
3471 * This function is called when user explicitly requests bus
3472 * scan. Set probe pending flag and invoke EH.
3473 *
3474 * LOCKING:
3475 * SCSI layer (we don't care)
3476 *
3477 * RETURNS:
3478 * Zero.
3479 */
3480static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3481 unsigned int id, unsigned int lun)
3482{
3483 struct ata_port *ap = ata_shost_to_port(shost);
3484 unsigned long flags;
41bda9c9 3485 int devno, rc = 0;
83c47bcb
TH		 3486
3487 if (!ap->ops->error_handler)
3488 return -EOPNOTSUPP;
3489
41bda9c9 3490 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3491 return -EINVAL;
3492
071f44b1 3493 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3494 if (channel != SCAN_WILD_CARD && channel)
3495 return -EINVAL;
3496 devno = id;
3497 } else {
3498 if (id != SCAN_WILD_CARD && id)
3499 return -EINVAL;
3500 devno = channel;
3501 }
3502
ba6a1308 3503 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3504
41bda9c9
TH		 3505 if (devno == SCAN_WILD_CARD) {
3506 struct ata_link *link;
3507
1eca4365 3508 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3509 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3510 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3511 ehi->action |= ATA_EH_RESET;
41bda9c9 3512 }
83c47bcb 3513 } else {
41bda9c9 3514 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3515
3516 if (dev) {
41bda9c9 3517 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3518 ehi->probe_mask |= 1 << dev->devno;
cf480626 3519 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3520 } else
3521 rc = -EINVAL;
3522 }
3523
309afcb5 3524 if (rc == 0) {
83c47bcb 3525 ata_port_schedule_eh(ap);
309afcb5
TH		 3526 spin_unlock_irqrestore(ap->lock, flags);
3527 ata_port_wait_eh(ap);
3528 } else
3529 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3530
3531 return rc;
3532}
3057ac3c 3533
3534/**
d0171269 3535 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3536 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3537 *
d0171269
TH		 3538 * After ATA pass thru (SAT) commands are executed successfully,
3539 * libata need to propagate the changes to SCSI layer. This
3540 * function must be executed from ata_aux_wq such that sdev
3541 * attach/detach don't race with rescan.
3057ac3c 3542 *
d0171269
TH		 3543 * LOCKING:
3544 * Kernel thread context (may sleep).
3057ac3c 3545 */
65f27f38 3546void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3547{
65f27f38
DH		 3548 struct ata_port *ap =
3549 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3550 struct ata_link *link;
f58229f8 3551 struct ata_device *dev;
f84e7e41 3552 unsigned long flags;
3057ac3c 3553
f84e7e41
TH		 3554 spin_lock_irqsave(ap->lock, flags);
3555
1eca4365
TH		 3556 ata_for_each_link(link, ap, EDGE) {
3557 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3558 struct scsi_device *sdev = dev->sdev;
3057ac3c 3559
1eca4365 3560 if (!sdev)
41bda9c9
TH		 3561 continue;
3562 if (scsi_device_get(sdev))
3563 continue;
f84e7e41 3564
41bda9c9
TH		 3565 spin_unlock_irqrestore(ap->lock, flags);
3566 scsi_rescan_device(&(sdev->sdev_gendev));
3567 scsi_device_put(sdev);
3568 spin_lock_irqsave(ap->lock, flags);
3569 }
3057ac3c 3570 }
f84e7e41
TH		 3571
3572 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3573}
80289167
BK		 3574
3575/**
3576 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3577 * @host: ATA host container for all SAS ports
80289167 3578 * @port_info: Information from low-level host driver
cca3974e 3579 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3580 *
3581 * LOCKING:
3582 * PCI/etc. bus probe sem.
3583 *
3584 * RETURNS:
3585 * ata_port pointer on success / NULL on failure.
3586 */
3587
cca3974e 3588struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3589 struct ata_port_info *port_info,
cca3974e 3590 struct Scsi_Host *shost)
80289167 3591{
f3187195 3592 struct ata_port *ap;
80289167 3593
f3187195 3594 ap = ata_port_alloc(host);
80289167
BK		 3595 if (!ap)
3596 return NULL;
3597
f3187195 3598 ap->port_no = 0;
cca3974e 3599 ap->lock = shost->host_lock;
f3187195
TH		 3600 ap->pio_mask = port_info->pio_mask;
3601 ap->mwdma_mask = port_info->mwdma_mask;
3602 ap->udma_mask = port_info->udma_mask;
3603 ap->flags |= port_info->flags;
3604 ap->ops = port_info->port_ops;
3605 ap->cbl = ATA_CBL_SATA;
3606
80289167
BK		 3607 return ap;
3608}
3609EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3610
3611/**
3612 * ata_sas_port_start - Set port up for dma.
3613 * @ap: Port to initialize
3614 *
3615 * Called just after data structures for each port are
dde20207 3616 * initialized.
80289167
BK		 3617 *
3618 * May be used as the port_start() entry in ata_port_operations.
3619 *
3620 * LOCKING:
3621 * Inherited from caller.
3622 */
3623int ata_sas_port_start(struct ata_port *ap)
3624{
dde20207 3625 return 0;
80289167
BK		 3626}
3627EXPORT_SYMBOL_GPL(ata_sas_port_start);
3628
3629/**
3630 * ata_port_stop - Undo ata_sas_port_start()
3631 * @ap: Port to shut down
3632 *
80289167
BK		 3633 * May be used as the port_stop() entry in ata_port_operations.
3634 *
3635 * LOCKING:
3636 * Inherited from caller.
3637 */
3638
3639void ata_sas_port_stop(struct ata_port *ap)
3640{
80289167
BK		 3641}
3642EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3643
3644/**
3645 * ata_sas_port_init - Initialize a SATA device
3646 * @ap: SATA port to initialize
3647 *
3648 * LOCKING:
3649 * PCI/etc. bus probe sem.
3650 *
3651 * RETURNS:
3652 * Zero on success, non-zero on error.
3653 */
3654
3655int ata_sas_port_init(struct ata_port *ap)
3656{
3657 int rc = ap->ops->port_start(ap);
3658
f3187195
TH		 3659 if (!rc) {
3660 ap->print_id = ata_print_id++;
80289167 3661 rc = ata_bus_probe(ap);
f3187195 3662 }
80289167
BK		 3663
3664 return rc;
3665}
3666EXPORT_SYMBOL_GPL(ata_sas_port_init);
3667
3668/**
3669 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3670 * @ap: SATA port to destroy
3671 *
3672 */
3673
3674void ata_sas_port_destroy(struct ata_port *ap)
3675{
f0d36efd
TH		 3676 if (ap->ops->port_stop)
3677 ap->ops->port_stop(ap);
80289167
BK		 3678 kfree(ap);
3679}
3680EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3681
3682/**
3683 * ata_sas_slave_configure - Default slave_config routine for libata devices
3684 * @sdev: SCSI device to configure
3685 * @ap: ATA port to which SCSI device is attached
3686 *
3687 * RETURNS:
3688 * Zero.
3689 */
3690
3691int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3692{
3693 ata_scsi_sdev_config(sdev);
9af5c9c9 3694 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3695 return 0;
3696}
3697EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3698
3699/**
3700 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3701 * @cmd: SCSI command to be sent
3702 * @done: Completion function, called when command is complete
3703 * @ap: ATA port to which the command is being sent
3704 *
3705 * RETURNS:
08475a19
BK		 3706 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3707 * 0 otherwise.
80289167
BK		 3708 */
3709
3710int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3711 struct ata_port *ap)
3712{
08475a19
BK		 3713 int rc = 0;
3714
80289167
BK		 3715 ata_scsi_dump_cdb(ap, cmd);
3716
2486fa56 3717 if (likely(ata_dev_enabled(ap->link.device)))
9af5c9c9 3718 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3719 else {
3720 cmd->result = (DID_BAD_TARGET << 16);
3721 done(cmd);
3722 }
08475a19 3723 return rc;
80289167
BK		 3724}
3725EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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