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ide-disk: use ata_id_hpa_enabled()
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
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;
193 unsigned long flags;
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;
211 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
212 link->eh_context.unloaded_mask & (1 << dev->devno) &&
213 time_after(dev->unpark_deadline, jiffies))
214 msecs = jiffies_to_msecs(dev->unpark_deadline - jiffies);
215 else
216 msecs = 0;
217
218unlock:
219 spin_unlock_irq(ap->lock);
220
221 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
222}
223
224static ssize_t ata_scsi_park_store(struct device *device,
225 struct device_attribute *attr,
226 const char *buf, size_t len)
227{
228 struct scsi_device *sdev = to_scsi_device(device);
229 struct ata_port *ap;
230 struct ata_device *dev;
231 long int input;
232 unsigned long flags;
233 int rc;
234
235 rc = strict_strtol(buf, 10, &input);
236 if (rc || input < -2)
237 return -EINVAL;
238 if (input > ATA_TMOUT_MAX_PARK) {
239 rc = -EOVERFLOW;
240 input = ATA_TMOUT_MAX_PARK;
241 }
242
243 ap = ata_shost_to_port(sdev->host);
244
245 spin_lock_irqsave(ap->lock, flags);
246 dev = ata_scsi_find_dev(ap, sdev);
247 if (unlikely(!dev)) {
248 rc = -ENODEV;
249 goto unlock;
250 }
251 if (dev->class != ATA_DEV_ATA) {
252 rc = -EOPNOTSUPP;
253 goto unlock;
254 }
255
256 if (input >= 0) {
257 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
258 rc = -EOPNOTSUPP;
259 goto unlock;
260 }
261
262 dev->unpark_deadline = ata_deadline(jiffies, input);
263 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
264 ata_port_schedule_eh(ap);
265 complete(&ap->park_req_pending);
266 } else {
267 switch (input) {
268 case -1:
269 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
270 break;
271 case -2:
272 dev->flags |= ATA_DFLAG_NO_UNLOAD;
273 break;
274 }
275 }
276unlock:
277 spin_unlock_irqrestore(ap->lock, flags);
278
279 return rc ? rc : len;
280}
281DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
282 ata_scsi_park_show, ata_scsi_park_store);
283EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
284
f0761be3
TH		 285static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
286{
287 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
288
289 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
290}
291
18f7ba4c
KCA		 292static ssize_t
293ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
295{
296 struct Scsi_Host *shost = class_to_shost(dev);
297 struct ata_port *ap = ata_shost_to_port(shost);
298 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
299 return ap->ops->em_store(ap, buf, count);
300 return -EINVAL;
301}
302
303static ssize_t
304ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
305 char *buf)
306{
307 struct Scsi_Host *shost = class_to_shost(dev);
308 struct ata_port *ap = ata_shost_to_port(shost);
309
310 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
311 return ap->ops->em_show(ap, buf);
312 return -EINVAL;
313}
314DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
315 ata_scsi_em_message_show, ata_scsi_em_message_store);
316EXPORT_SYMBOL_GPL(dev_attr_em_message);
317
318static ssize_t
319ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
320 char *buf)
321{
322 struct Scsi_Host *shost = class_to_shost(dev);
323 struct ata_port *ap = ata_shost_to_port(shost);
324
325 return snprintf(buf, 23, "%d\n", ap->em_message_type);
326}
327DEVICE_ATTR(em_message_type, S_IRUGO,
328 ata_scsi_em_message_type_show, NULL);
329EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
330
331static ssize_t
332ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
333 char *buf)
334{
335 struct scsi_device *sdev = to_scsi_device(dev);
336 struct ata_port *ap = ata_shost_to_port(sdev->host);
337 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
338
339 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
340 return ap->ops->sw_activity_show(atadev, buf);
341 return -EINVAL;
342}
343
344static ssize_t
345ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
346 const char *buf, size_t count)
347{
348 struct scsi_device *sdev = to_scsi_device(dev);
349 struct ata_port *ap = ata_shost_to_port(sdev->host);
350 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
351 enum sw_activity val;
352 int rc;
353
354 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
355 val = simple_strtoul(buf, NULL, 0);
356 switch (val) {
357 case OFF: case BLINK_ON: case BLINK_OFF:
358 rc = ap->ops->sw_activity_store(atadev, val);
359 if (!rc)
360 return count;
361 else
362 return rc;
363 }
364 }
365 return -EINVAL;
366}
367DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
368 ata_scsi_activity_store);
369EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
370
45fabbb7
EO		 371struct device_attribute *ata_common_sdev_attrs[] = {
372 &dev_attr_unload_heads,
373 NULL
374};
375EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
376
ae006510
DG		 377static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
378 void (*done)(struct scsi_cmnd *))
379{
380 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
381 /* "Invalid field in cbd" */
382 done(cmd);
383}
384
1da177e4
LT		 385/**
386 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
387 * @sdev: SCSI device for which BIOS geometry is to be determined
388 * @bdev: block device associated with @sdev
389 * @capacity: capacity of SCSI device
390 * @geom: location to which geometry will be output
391 *
392 * Generic bios head/sector/cylinder calculator
393 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
394 * mapping. Some situations may arise where the disk is not
395 * bootable if this is not used.
396 *
397 * LOCKING:
398 * Defined by the SCSI layer. We don't really care.
399 *
400 * RETURNS:
401 * Zero.
402 */
403int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
404 sector_t capacity, int geom[])
405{
406 geom[0] = 255;
407 geom[1] = 63;
408 sector_div(capacity, 255*63);
409 geom[2] = capacity;
410
411 return 0;
412}
413
5924b74c
TH		 414/**
415 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
416 * @sdev: SCSI device to get identify data for
417 * @arg: User buffer area for identify data
418 *
419 * LOCKING:
420 * Defined by the SCSI layer. We don't really care.
421 *
422 * RETURNS:
423 * Zero on success, negative errno on error.
424 */
425static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
426{
427 struct ata_port *ap = ata_shost_to_port(sdev->host);
428 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
429 u16 __user *dst = arg;
430 char buf[40];
431
432 if (!dev)
433 return -ENOMSG;
434
435 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
436 return -EFAULT;
437
438 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
439 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
440 return -EFAULT;
441
442 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
443 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
444 return -EFAULT;
445
446 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
447 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
448 return -EFAULT;
449
450 return 0;
451}
452
b095518e
JG		 453/**
454 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 455 * @scsidev: Device to which we are issuing command
b095518e
JG		 456 * @arg: User provided data for issuing command
457 *
458 * LOCKING:
459 * Defined by the SCSI layer. We don't really care.
460 *
461 * RETURNS:
462 * Zero on success, negative errno on error.
463 */
b095518e
JG		 464int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
465{
466 int rc = 0;
467 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 468 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 469 int argsize = 0;
85837ebd 470 enum dma_data_direction data_dir;
bbe1fe7e 471 int cmd_result;
b095518e 472
c893a3ae 473 if (arg == NULL)
b095518e
JG		 474 return -EINVAL;
475
476 if (copy_from_user(args, arg, sizeof(args)))
477 return -EFAULT;
478
bbe1fe7e
ET		 479 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
480 if (!sensebuf)
481 return -ENOMEM;
482
b095518e
JG		 483 memset(scsi_cmd, 0, sizeof(scsi_cmd));
484
485 if (args[3]) {
486 argsize = SECTOR_SIZE * args[3];
487 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 488 if (argbuf == NULL) {
489 rc = -ENOMEM;
490 goto error;
491 }
b095518e
JG		 492
493 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
494 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 495 block count in sector count field */
85837ebd 496 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 497 } else {
498 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 499 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 500 data_dir = DMA_NONE;
b095518e
JG		 501 }
502
503 scsi_cmd[0] = ATA_16;
504
505 scsi_cmd[4] = args[2];
506 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
507 scsi_cmd[6] = args[3];
508 scsi_cmd[8] = args[1];
509 scsi_cmd[10] = 0x4f;
510 scsi_cmd[12] = 0xc2;
511 } else {
512 scsi_cmd[6] = args[1];
513 }
514 scsi_cmd[14] = args[0];
515
516 /* Good values for timeout and retries? Values below
517 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 518 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
2dcb407e 519 sensebuf, (10*HZ), 5, 0);
bbe1fe7e
ET		 520
521 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
522 u8 *desc = sensebuf + 8;
523 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
524
525 /* If we set cc then ATA pass-through will cause a
526 * check condition even if no error. Filter that. */
527 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
528 struct scsi_sense_hdr sshdr;
529 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e
JG		 530 &sshdr);
531 if (sshdr.sense_key == 0 &&
532 sshdr.asc == 0 && sshdr.ascq == 0)
bbe1fe7e
ET		 533 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
534 }
535
536 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 537 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
538 desc[0] == 0x09) { /* code is "ATA Descriptor" */
539 args[0] = desc[13]; /* status */
540 args[1] = desc[3]; /* error */
541 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 542 if (copy_to_user(arg, args, sizeof(args)))
543 rc = -EFAULT;
544 }
545 }
546
547
548 if (cmd_result) {
b095518e
JG		 549 rc = -EIO;
550 goto error;
551 }
552
b095518e 553 if ((argbuf)
c893a3ae 554 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 555 rc = -EFAULT;
556error:
bbe1fe7e 557 kfree(sensebuf);
8f760780 558 kfree(argbuf);
b095518e
JG		 559 return rc;
560}
561
562/**
563 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 564 * @scsidev: Device to which we are issuing command
b095518e
JG		 565 * @arg: User provided data for issuing command
566 *
567 * LOCKING:
568 * Defined by the SCSI layer. We don't really care.
569 *
570 * RETURNS:
571 * Zero on success, negative errno on error.
572 */
573int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
574{
575 int rc = 0;
576 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 577 u8 args[7], *sensebuf = NULL;
578 int cmd_result;
b095518e 579
c893a3ae 580 if (arg == NULL)
b095518e
JG		 581 return -EINVAL;
582
583 if (copy_from_user(args, arg, sizeof(args)))
584 return -EFAULT;
585
af068bd1
DM		 586 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
587 if (!sensebuf)
588 return -ENOMEM;
589
b095518e
JG		 590 memset(scsi_cmd, 0, sizeof(scsi_cmd));
591 scsi_cmd[0] = ATA_16;
592 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 593 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 594 scsi_cmd[4] = args[1];
595 scsi_cmd[6] = args[2];
596 scsi_cmd[8] = args[3];
597 scsi_cmd[10] = args[4];
598 scsi_cmd[12] = args[5];
277239f2 599 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 600 scsi_cmd[14] = args[0];
601
b095518e 602 /* Good values for timeout and retries? Values below
2e9edbf8 603 from scsi_ioctl_send_command() for default case... */
af068bd1
DM		 604 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
605 sensebuf, (10*HZ), 5, 0);
606
607 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
608 u8 *desc = sensebuf + 8;
609 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
610
611 /* If we set cc then ATA pass-through will cause a
612 * check condition even if no error. Filter that. */
613 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
614 struct scsi_sense_hdr sshdr;
615 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
616 &sshdr);
2dcb407e
JG		 617 if (sshdr.sense_key == 0 &&
618 sshdr.asc == 0 && sshdr.ascq == 0)
af068bd1
DM		 619 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
620 }
621
622 /* Send userspace ATA registers */
623 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
624 desc[0] == 0x09) {/* code is "ATA Descriptor" */
625 args[0] = desc[13]; /* status */
626 args[1] = desc[3]; /* error */
627 args[2] = desc[5]; /* sector count (0:7) */
628 args[3] = desc[7]; /* lbal */
629 args[4] = desc[9]; /* lbam */
630 args[5] = desc[11]; /* lbah */
631 args[6] = desc[12]; /* select */
632 if (copy_to_user(arg, args, sizeof(args)))
633 rc = -EFAULT;
634 }
635 }
636
637 if (cmd_result) {
b095518e 638 rc = -EIO;
af068bd1
DM		 639 goto error;
640 }
b095518e 641
af068bd1
DM		 642 error:
643 kfree(sensebuf);
b095518e
JG		 644 return rc;
645}
646
1da177e4
LT		 647int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
648{
1da177e4
LT		 649 int val = -EINVAL, rc = -EINVAL;
650
1da177e4
LT		 651 switch (cmd) {
652 case ATA_IOC_GET_IO32:
653 val = 0;
654 if (copy_to_user(arg, &val, 1))
655 return -EFAULT;
656 return 0;
657
658 case ATA_IOC_SET_IO32:
659 val = (unsigned long) arg;
660 if (val != 0)
661 return -EINVAL;
662 return 0;
663
5924b74c
TH		 664 case HDIO_GET_IDENTITY:
665 return ata_get_identity(scsidev, arg);
666
b095518e
JG		 667 case HDIO_DRIVE_CMD:
668 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
669 return -EACCES;
670 return ata_cmd_ioctl(scsidev, arg);
671
672 case HDIO_DRIVE_TASK:
673 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
674 return -EACCES;
675 return ata_task_ioctl(scsidev, arg);
676
1da177e4
LT		 677 default:
678 rc = -ENOTTY;
679 break;
680 }
681
1da177e4
LT		 682 return rc;
683}
684
685/**
686 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 687 * @dev: ATA device to which the new command is attached
688 * @cmd: SCSI command that originated this ATA command
689 * @done: SCSI command completion function
690 *
691 * Obtain a reference to an unused ata_queued_cmd structure,
692 * which is the basic libata structure representing a single
693 * ATA command sent to the hardware.
694 *
695 * If a command was available, fill in the SCSI-specific
696 * portions of the structure with information on the
697 * current command.
698 *
699 * LOCKING:
cca3974e 700 * spin_lock_irqsave(host lock)
1da177e4
LT		 701 *
702 * RETURNS:
703 * Command allocated, or %NULL if none available.
704 */
7102d230
AB		 705static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
706 struct scsi_cmnd *cmd,
707 void (*done)(struct scsi_cmnd *))
1da177e4
LT		 708{
709 struct ata_queued_cmd *qc;
710
3373efd8 711 qc = ata_qc_new_init(dev);
1da177e4
LT		 712 if (qc) {
713 qc->scsicmd = cmd;
714 qc->scsidone = done;
715
ff2aeb1e 716 qc->sg = scsi_sglist(cmd);
7120165c 717 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 718 } else {
719 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
720 done(cmd);
721 }
722
723 return qc;
724}
725
aacda375
TH		 726static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
727{
728 struct scsi_cmnd *scmd = qc->scsicmd;
729
730 qc->extrabytes = scmd->request->extra_len;
731 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
732}
733
b095518e
JG		 734/**
735 * ata_dump_status - user friendly display of error info
736 * @id: id of the port in question
737 * @tf: ptr to filled out taskfile
738 *
739 * Decode and dump the ATA error/status registers for the user so
740 * that they have some idea what really happened at the non
741 * make-believe layer.
742 *
743 * LOCKING:
744 * inherited from caller
745 */
7102d230 746static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 747{
748 u8 stat = tf->command, err = tf->feature;
749
750 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
751 if (stat & ATA_BUSY) {
752 printk("Busy }\n"); /* Data is not valid in this case */
753 } else {
754 if (stat & 0x40) printk("DriveReady ");
755 if (stat & 0x20) printk("DeviceFault ");
756 if (stat & 0x10) printk("SeekComplete ");
757 if (stat & 0x08) printk("DataRequest ");
758 if (stat & 0x04) printk("CorrectedError ");
759 if (stat & 0x02) printk("Index ");
760 if (stat & 0x01) printk("Error ");
761 printk("}\n");
762
763 if (err) {
764 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
765 if (err & 0x04) printk("DriveStatusError ");
766 if (err & 0x80) {
767 if (err & 0x04) printk("BadCRC ");
768 else printk("Sector ");
769 }
770 if (err & 0x40) printk("UncorrectableError ");
771 if (err & 0x10) printk("SectorIdNotFound ");
772 if (err & 0x02) printk("TrackZeroNotFound ");
773 if (err & 0x01) printk("AddrMarkNotFound ");
774 printk("}\n");
775 }
776 }
777}
778
1da177e4
LT		 779/**
780 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 781 * @id: ATA device number
1da177e4 782 * @drv_stat: value contained in ATA status register
b095518e
JG		 783 * @drv_err: value contained in ATA error register
784 * @sk: the sense key we'll fill out
785 * @asc: the additional sense code we'll fill out
786 * @ascq: the additional sense code qualifier we'll fill out
246619da 787 * @verbose: be verbose
1da177e4 788 *
b095518e
JG		 789 * Converts an ATA error into a SCSI error. Fill out pointers to
790 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
791 * format sense blocks.
1da177e4
LT		 792 *
793 * LOCKING:
cca3974e 794 * spin_lock_irqsave(host lock)
1da177e4 795 */
7102d230
AB		 796static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
797 u8 *asc, u8 *ascq, int verbose)
1da177e4 798{
b095518e 799 int i;
ffe75ef6 800
1da177e4 801 /* Based on the 3ware driver translation table */
98ac62de 802 static const unsigned char sense_table[][4] = {
1da177e4
LT		 803 /* BBD|ECC|ID|MAR */
804 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
805 /* BBD|ECC|ID */
806 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
807 /* ECC|MC|MARK */
808 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
809 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
810 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
811 /* MC|ID|ABRT|TRK0|MARK */
812 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
813 /* MCR|MARK */
814 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
815 /* Bad address mark */
816 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
817 /* TRK0 */
818 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
819 /* Abort & !ICRC */
820 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
821 /* Media change request */
822 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
823 /* SRV */
824 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
825 /* Media change */
826 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
827 /* ECC */
828 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
829 /* BBD - block marked bad */
830 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
831 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
832 };
98ac62de 833 static const unsigned char stat_table[][4] = {
1da177e4
LT		 834 /* Must be first because BUSY means no other bits valid */
835 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
836 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
837 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
838 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
839 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
840 };
1da177e4 841
1da177e4
LT		 842 /*
843 * Is this an error we can process/parse
844 */
b095518e
JG		 845 if (drv_stat & ATA_BUSY) {
846 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 847 }
b095518e
JG		 848
849 if (drv_err) {
850 /* Look for drv_err */
851 for (i = 0; sense_table[i][0] != 0xFF; i++) {
852 /* Look for best matches first */
2e9edbf8 853 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 854 sense_table[i][0]) {
855 *sk = sense_table[i][1];
856 *asc = sense_table[i][2];
857 *ascq = sense_table[i][3];
858 goto translate_done;
859 }
860 }
861 /* No immediate match */
246619da
TH		 862 if (verbose)
863 printk(KERN_WARNING "ata%u: no sense translation for "
864 "error 0x%02x\n", id, drv_err);
1da177e4 865 }
b095518e
JG		 866
867 /* Fall back to interpreting status bits */
868 for (i = 0; stat_table[i][0] != 0xFF; i++) {
869 if (stat_table[i][0] & drv_stat) {
870 *sk = stat_table[i][1];
871 *asc = stat_table[i][2];
872 *ascq = stat_table[i][3];
873 goto translate_done;
1da177e4 874 }
b095518e
JG		 875 }
876 /* No error? Undecoded? */
246619da
TH		 877 if (verbose)
878 printk(KERN_WARNING "ata%u: no sense translation for "
879 "status: 0x%02x\n", id, drv_stat);
b095518e 880
2d202024
AC		 881 /* We need a sensible error return here, which is tricky, and one
882 that won't cause people to do things like return a disk wrongly */
883 *sk = ABORTED_COMMAND;
884 *asc = 0x00;
885 *ascq = 0x00;
b095518e
JG		 886
887 translate_done:
246619da
TH		 888 if (verbose)
889 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
890 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
891 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 892 return;
893}
894
895/*
750426aa 896 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 897 * @qc: Command that completed.
898 *
899 * This function is specific to the ATA descriptor format sense
900 * block specified for the ATA pass through commands. Regardless
901 * of whether the command errored or not, return a sense
902 * block. Copy all controller registers into the sense
903 * block. Clear sense key, ASC & ASCQ if there is no error.
904 *
905 * LOCKING:
750426aa 906 * None.
b095518e 907 */
750426aa 908static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 909{
910 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 911 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 912 unsigned char *sb = cmd->sense_buffer;
913 unsigned char *desc = sb + 8;
246619da 914 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 915
916 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
917
0e5dec47 918 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 919
b095518e
JG		 920 /*
921 * Use ata_to_sense_error() to map status register bits
922 * onto sense key, asc & ascq.
923 */
058e55e1
TH		 924 if (qc->err_mask ||
925 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 926 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 927 &sb[1], &sb[2], &sb[3], verbose);
b095518e 928 sb[1] &= 0x0f;
1da177e4
LT		 929 }
930
b095518e
JG		 931 /*
932 * Sense data is current and format is descriptor.
933 */
934 sb[0] = 0x72;
1da177e4 935
b095518e
JG		 936 desc[0] = 0x09;
937
f38621b3
TH		 938 /* set length of additional sense data */
939 sb[7] = 14;
940 desc[1] = 12;
b095518e
JG		 941
942 /*
943 * Copy registers into sense buffer.
944 */
945 desc[2] = 0x00;
946 desc[3] = tf->feature; /* == error reg */
947 desc[5] = tf->nsect;
948 desc[7] = tf->lbal;
949 desc[9] = tf->lbam;
950 desc[11] = tf->lbah;
951 desc[12] = tf->device;
952 desc[13] = tf->command; /* == status reg */
953
954 /*
955 * Fill in Extend bit, and the high order bytes
956 * if applicable.
957 */
958 if (tf->flags & ATA_TFLAG_LBA48) {
959 desc[2] |= 0x01;
960 desc[4] = tf->hob_nsect;
961 desc[6] = tf->hob_lbal;
962 desc[8] = tf->hob_lbam;
963 desc[10] = tf->hob_lbah;
1da177e4 964 }
b095518e 965}
1da177e4 966
b095518e 967/**
750426aa 968 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 969 * @qc: Command that we are erroring out
970 *
d25614ba
TH		 971 * Generate sense block for a failed ATA command @qc. Descriptor
972 * format is used to accomodate LBA48 block address.
b095518e
JG		 973 *
974 * LOCKING:
750426aa 975 * None.
b095518e 976 */
750426aa 977static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 978{
d25614ba 979 struct ata_device *dev = qc->dev;
b095518e 980 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 981 struct ata_taskfile *tf = &qc->result_tf;
b095518e 982 unsigned char *sb = cmd->sense_buffer;
d25614ba 983 unsigned char *desc = sb + 8;
246619da 984 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 985 u64 block;
b095518e
JG		 986
987 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
988
0e5dec47 989 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 990
d25614ba
TH		 991 /* sense data is current and format is descriptor */
992 sb[0] = 0x72;
993
994 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 995 * onto sense key, asc & ascq.
996 */
058e55e1
TH		 997 if (qc->err_mask ||
998 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 999 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1000 &sb[1], &sb[2], &sb[3], verbose);
1001 sb[1] &= 0x0f;
1da177e4 1002 }
1da177e4 1003
d25614ba 1004 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1005
d25614ba
TH		 1006 /* information sense data descriptor */
1007 sb[7] = 12;
1008 desc[0] = 0x00;
1009 desc[1] = 10;
a7dac447 1010
d25614ba
TH		 1011 desc[2] |= 0x80; /* valid */
1012 desc[6] = block >> 40;
1013 desc[7] = block >> 32;
1014 desc[8] = block >> 24;
1015 desc[9] = block >> 16;
1016 desc[10] = block >> 8;
1017 desc[11] = block;
1da177e4
LT		 1018}
1019
a6cce2a7
BK		 1020static void ata_scsi_sdev_config(struct scsi_device *sdev)
1021{
1022 sdev->use_10_for_rw = 1;
1023 sdev->use_10_for_ms = 1;
31cc23b3
TH		 1024
1025 /* Schedule policy is determined by ->qc_defer() callback and
1026 * it needs to see every deferred qc. Set dev_blocked to 1 to
1027 * prevent SCSI midlayer from automatically deferring
1028 * requests.
1029 */
1030 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1031}
1032
fa2fc7f4
JB		 1033/**
1034 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1035 * @rq: request to be checked
fa2fc7f4
JB		 1036 *
1037 * ATAPI commands which transfer variable length data to host
1038 * might overflow due to application error or hardare bug. This
1039 * function checks whether overflow should be drained and ignored
1040 * for @request.
1041 *
1042 * LOCKING:
1043 * None.
1044 *
1045 * RETURNS:
1046 * 1 if ; otherwise, 0.
1047 */
1048static int atapi_drain_needed(struct request *rq)
1049{
1050 if (likely(!blk_pc_request(rq)))
1051 return 0;
1052
1053 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
1054 return 0;
1055
1056 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1057}
1058
1059static int ata_scsi_dev_config(struct scsi_device *sdev,
1060 struct ata_device *dev)
a6cce2a7 1061{
45fabbb7
EO		 1062 if (!ata_id_has_unload(dev->id))
1063 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1064
914ed354
TH		 1065 /* configure max sectors */
1066 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 1067
fa2fc7f4
JB		 1068 if (dev->class == ATA_DEV_ATAPI) {
1069 struct request_queue *q = sdev->request_queue;
1070 void *buf;
1071
e3790c7d 1072 /* set the min alignment and padding */
d0ad3bc9
JB		 1073 blk_queue_update_dma_alignment(sdev->request_queue,
1074 ATA_DMA_PAD_SZ - 1);
27f8221a
FT		 1075 blk_queue_update_dma_pad(sdev->request_queue,
1076 ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1077
1078 /* configure draining */
1079 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1080 if (!buf) {
1081 ata_dev_printk(dev, KERN_ERR,
1082 "drain buffer allocation failed\n");
1083 return -ENOMEM;
1084 }
1085
1086 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1087 } else {
8bff7c6b
JA		 1088 if (ata_id_is_ssd(dev->id))
1089 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1090 sdev->request_queue);
1091
d0ad3bc9
JB		 1092 /* ATA devices must be sector aligned */
1093 blk_queue_update_dma_alignment(sdev->request_queue,
1094 ATA_SECT_SIZE - 1);
d8cf5389 1095 sdev->manage_start_stop = 1;
dde20207 1096 }
d8cf5389 1097
f26792d5
JG		 1098 if (dev->flags & ATA_DFLAG_AN)
1099 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1100
a6e6ce8e
TH		 1101 if (dev->flags & ATA_DFLAG_NCQ) {
1102 int depth;
1103
1104 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1105 depth = min(ATA_MAX_QUEUE - 1, depth);
1106 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1107 }
fa2fc7f4
JB		 1108
1109 return 0;
a6cce2a7
BK		 1110}
1111
1da177e4
LT		 1112/**
1113 * ata_scsi_slave_config - Set SCSI device attributes
1114 * @sdev: SCSI device to examine
1115 *
1116 * This is called before we actually start reading
1117 * and writing to the device, to configure certain
1118 * SCSI mid-layer behaviors.
1119 *
1120 * LOCKING:
1121 * Defined by SCSI layer. We don't really care.
1122 */
1123
1124int ata_scsi_slave_config(struct scsi_device *sdev)
1125{
31534363
TH		 1126 struct ata_port *ap = ata_shost_to_port(sdev->host);
1127 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1128 int rc = 0;
31534363 1129
a6cce2a7 1130 ata_scsi_sdev_config(sdev);
1da177e4 1131
31534363 1132 if (dev)
fa2fc7f4 1133 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1134
fa2fc7f4 1135 return rc;
1da177e4
LT		 1136}
1137
83c47bcb
TH		 1138/**
1139 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1140 * @sdev: SCSI device to be destroyed
1141 *
1142 * @sdev is about to be destroyed for hot/warm unplugging. If
1143 * this unplugging was initiated by libata as indicated by NULL
1144 * dev->sdev, this function doesn't have to do anything.
1145 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1146 * Clear dev->sdev, schedule the device for ATA detach and invoke
1147 * EH.
1148 *
1149 * LOCKING:
1150 * Defined by SCSI layer. We don't really care.
1151 */
1152void ata_scsi_slave_destroy(struct scsi_device *sdev)
1153{
1154 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1155 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1156 unsigned long flags;
1157 struct ata_device *dev;
1158
1159 if (!ap->ops->error_handler)
1160 return;
1161
ba6a1308 1162 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1163 dev = __ata_scsi_find_dev(ap, sdev);
1164 if (dev && dev->sdev) {
1165 /* SCSI device already in CANCEL state, no need to offline it */
1166 dev->sdev = NULL;
1167 dev->flags |= ATA_DFLAG_DETACH;
1168 ata_port_schedule_eh(ap);
1169 }
ba6a1308 1170 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1171
1172 kfree(q->dma_drain_buffer);
1173 q->dma_drain_buffer = NULL;
1174 q->dma_drain_size = 0;
83c47bcb
TH		 1175}
1176
a6e6ce8e
TH		 1177/**
1178 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1179 * @sdev: SCSI device to configure queue depth for
1180 * @queue_depth: new queue depth
1181 *
1182 * This is libata standard hostt->change_queue_depth callback.
1183 * SCSI will call into this callback when user tries to set queue
1184 * depth via sysfs.
1185 *
1186 * LOCKING:
1187 * SCSI layer (we don't care)
1188 *
1189 * RETURNS:
1190 * Newly configured queue depth.
1191 */
1192int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1193{
1194 struct ata_port *ap = ata_shost_to_port(sdev->host);
1195 struct ata_device *dev;
360f654e 1196 unsigned long flags;
a6e6ce8e 1197
c3c70c44 1198 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1199 return sdev->queue_depth;
1200
1201 dev = ata_scsi_find_dev(ap, sdev);
1202 if (!dev || !ata_dev_enabled(dev))
1203 return sdev->queue_depth;
1204
c3c70c44 1205 /* NCQ enabled? */
360f654e 1206 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1207 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1208 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1209 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1210 queue_depth = 1;
1211 }
360f654e
TH		 1212 spin_unlock_irqrestore(ap->lock, flags);
1213
c3c70c44
TH		 1214 /* limit and apply queue depth */
1215 queue_depth = min(queue_depth, sdev->host->can_queue);
1216 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1217 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1218
1219 if (sdev->queue_depth == queue_depth)
1220 return -EINVAL;
1221
1222 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1223 return queue_depth;
1224}
1225
d9aca22c 1226/* XXX: for spindown warning */
da071b42
TH		 1227static void ata_delayed_done_timerfn(unsigned long arg)
1228{
1229 struct scsi_cmnd *scmd = (void *)arg;
1230
1231 scmd->scsi_done(scmd);
1232}
1233
d9aca22c 1234/* XXX: for spindown warning */
da071b42
TH		 1235static void ata_delayed_done(struct scsi_cmnd *scmd)
1236{
1237 static struct timer_list timer;
1238
1239 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1240 mod_timer(&timer, jiffies + 5 * HZ);
1241}
1242
972dcafb
DG		 1243/**
1244 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1245 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1246 *
1247 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1248 * (to start). Perhaps these commands should be preceded by
1249 * CHECK POWER MODE to see what power mode the device is already in.
1250 * [See SAT revision 5 at www.t10.org]
1251 *
1252 * LOCKING:
cca3974e 1253 * spin_lock_irqsave(host lock)
972dcafb
DG		 1254 *
1255 * RETURNS:
1256 * Zero on success, non-zero on error.
1257 */
ad706991 1258static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1259{
542b1444 1260 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1261 struct ata_taskfile *tf = &qc->tf;
ad706991 1262 const u8 *cdb = scmd->cmnd;
972dcafb 1263
2e5704f6
TH		 1264 if (scmd->cmd_len < 5)
1265 goto invalid_fld;
1266
972dcafb
DG		 1267 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1268 tf->protocol = ATA_PROT_NODATA;
542b1444 1269 if (cdb[1] & 0x1) {
972dcafb
DG		 1270 ; /* ignore IMMED bit, violates sat-r05 */
1271 }
542b1444 1272 if (cdb[4] & 0x2)
ae006510 1273 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1274 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1275 goto invalid_fld; /* power conditions not supported */
e31e8531 1276
542b1444 1277 if (cdb[4] & 0x1) {
972dcafb 1278 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1279
1280 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1281 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1282
1283 tf->lbah = 0x0;
1284 tf->lbam = 0x0;
1285 tf->lbal = 0x0;
1286 tf->device |= ATA_LBA;
1287 } else {
1288 /* CHS */
1289 tf->lbal = 0x1; /* sect */
1290 tf->lbam = 0x0; /* cyl low */
1291 tf->lbah = 0x0; /* cyl high */
1292 }
1293
972dcafb 1294 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10
TH		 1295 } else {
1296 /* XXX: This is for backward compatibility, will be
1297 * removed. Read Documentation/feature-removal-schedule.txt
1298 * for more info.
1299 */
d9aca22c 1300 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
920a4b10
TH		 1301 (system_state == SYSTEM_HALT ||
1302 system_state == SYSTEM_POWER_OFF)) {
2dcb407e 1303 static unsigned long warned;
920a4b10 1304
da071b42 1305 if (!test_and_set_bit(0, &warned)) {
920a4b10
TH		 1306 ata_dev_printk(qc->dev, KERN_WARNING,
1307 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1308 "UPDATE SHUTDOWN UTILITY\n");
1309 ata_dev_printk(qc->dev, KERN_WARNING,
1310 "For more info, visit "
1311 "http://linux-ata.org/shutdown.html\n");
da071b42
TH		 1312
1313 /* ->scsi_done is not used, use it for
1314 * delayed completion.
1315 */
1316 scmd->scsi_done = qc->scsidone;
1317 qc->scsidone = ata_delayed_done;
920a4b10
TH		 1318 }
1319 scmd->result = SAM_STAT_GOOD;
1320 return 1;
1321 }
1322
78981a7c
RH		 1323 /* Issue ATA STANDBY IMMEDIATE command */
1324 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1325 }
78981a7c 1326
972dcafb
DG		 1327 /*
1328 * Standby and Idle condition timers could be implemented but that
1329 * would require libata to implement the Power condition mode page
1330 * and allow the user to change it. Changing mode pages requires
1331 * MODE SELECT to be implemented.
1332 */
1333
1334 return 0;
ae006510
DG		 1335
1336invalid_fld:
542b1444 1337 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1338 /* "Invalid field in cbd" */
1339 return 1;
972dcafb
DG		 1340}
1341
1342
1da177e4
LT		 1343/**
1344 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1345 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1346 *
1347 * Sets up an ATA taskfile to issue FLUSH CACHE or
1348 * FLUSH CACHE EXT.
1349 *
1350 * LOCKING:
cca3974e 1351 * spin_lock_irqsave(host lock)
1da177e4
LT		 1352 *
1353 * RETURNS:
1354 * Zero on success, non-zero on error.
1355 */
ad706991 1356static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1357{
1358 struct ata_taskfile *tf = &qc->tf;
1359
1360 tf->flags |= ATA_TFLAG_DEVICE;
1361 tf->protocol = ATA_PROT_NODATA;
1362
6fc49adb 1363 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1364 tf->command = ATA_CMD_FLUSH_EXT;
1365 else
1366 tf->command = ATA_CMD_FLUSH;
1367
b666da35
TH		 1368 /* flush is critical for IO integrity, consider it an IO command */
1369 qc->flags |= ATA_QCFLAG_IO;
1370
1da177e4
LT		 1371 return 0;
1372}
1373
3aef5231
AL		 1374/**
1375 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1376 * @cdb: SCSI command to translate
3aef5231
AL		 1377 *
1378 * Calculate LBA and transfer length for 6-byte commands.
1379 *
1380 * RETURNS:
1381 * @plba: the LBA
1382 * @plen: the transfer length
1383 */
542b1444 1384static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1385{
1386 u64 lba = 0;
6c7b7d2b 1387 u32 len;
3aef5231
AL		 1388
1389 VPRINTK("six-byte command\n");
1390
6c7b7d2b 1391 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1392 lba |= ((u64)cdb[2]) << 8;
1393 lba |= ((u64)cdb[3]);
3aef5231 1394
6c7b7d2b 1395 len = cdb[4];
3aef5231
AL		 1396
1397 *plba = lba;
1398 *plen = len;
1399}
1400
1401/**
1402 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1403 * @cdb: SCSI command to translate
3aef5231
AL		 1404 *
1405 * Calculate LBA and transfer length for 10-byte commands.
1406 *
1407 * RETURNS:
1408 * @plba: the LBA
1409 * @plen: the transfer length
1410 */
542b1444 1411static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1412{
1413 u64 lba = 0;
1414 u32 len = 0;
1415
1416 VPRINTK("ten-byte command\n");
1417
542b1444
TH		 1418 lba |= ((u64)cdb[2]) << 24;
1419 lba |= ((u64)cdb[3]) << 16;
1420 lba |= ((u64)cdb[4]) << 8;
1421 lba |= ((u64)cdb[5]);
3aef5231 1422
542b1444
TH		 1423 len |= ((u32)cdb[7]) << 8;
1424 len |= ((u32)cdb[8]);
3aef5231
AL		 1425
1426 *plba = lba;
1427 *plen = len;
1428}
1429
1430/**
1431 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1432 * @cdb: SCSI command to translate
3aef5231
AL		 1433 *
1434 * Calculate LBA and transfer length for 16-byte commands.
1435 *
1436 * RETURNS:
1437 * @plba: the LBA
1438 * @plen: the transfer length
1439 */
542b1444 1440static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1441{
1442 u64 lba = 0;
1443 u32 len = 0;
1444
1445 VPRINTK("sixteen-byte command\n");
1446
542b1444
TH		 1447 lba |= ((u64)cdb[2]) << 56;
1448 lba |= ((u64)cdb[3]) << 48;
1449 lba |= ((u64)cdb[4]) << 40;
1450 lba |= ((u64)cdb[5]) << 32;
1451 lba |= ((u64)cdb[6]) << 24;
1452 lba |= ((u64)cdb[7]) << 16;
1453 lba |= ((u64)cdb[8]) << 8;
1454 lba |= ((u64)cdb[9]);
3aef5231 1455
542b1444
TH		 1456 len |= ((u32)cdb[10]) << 24;
1457 len |= ((u32)cdb[11]) << 16;
1458 len |= ((u32)cdb[12]) << 8;
1459 len |= ((u32)cdb[13]);
3aef5231
AL		 1460
1461 *plba = lba;
1462 *plen = len;
1463}
1464
1da177e4
LT		 1465/**
1466 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1467 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1468 *
1469 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1470 *
1471 * LOCKING:
cca3974e 1472 * spin_lock_irqsave(host lock)
1da177e4
LT		 1473 *
1474 * RETURNS:
1475 * Zero on success, non-zero on error.
1476 */
ad706991 1477static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1478{
542b1444 1479 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1480 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1481 struct ata_device *dev = qc->dev;
1da177e4 1482 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1483 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1484 u64 block;
1485 u32 n_block;
1da177e4
LT		 1486
1487 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1488 tf->protocol = ATA_PROT_NODATA;
1da177e4 1489
2e5704f6
TH		 1490 if (cdb[0] == VERIFY) {
1491 if (scmd->cmd_len < 10)
1492 goto invalid_fld;
542b1444 1493 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1494 } else if (cdb[0] == VERIFY_16) {
1495 if (scmd->cmd_len < 16)
1496 goto invalid_fld;
542b1444 1497 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1498 } else
ae006510 1499 goto invalid_fld;
1da177e4 1500
8bf62ece 1501 if (!n_block)
ae006510 1502 goto nothing_to_do;
8bf62ece 1503 if (block >= dev_sectors)
ae006510 1504 goto out_of_range;
8bf62ece 1505 if ((block + n_block) > dev_sectors)
ae006510 1506 goto out_of_range;
1da177e4 1507
07506697
AL		 1508 if (dev->flags & ATA_DFLAG_LBA) {
1509 tf->flags |= ATA_TFLAG_LBA;
1510
c6a33e24
AL		 1511 if (lba_28_ok(block, n_block)) {
1512 /* use LBA28 */
1513 tf->command = ATA_CMD_VERIFY;
1514 tf->device |= (block >> 24) & 0xf;
1515 } else if (lba_48_ok(block, n_block)) {
1516 if (!(dev->flags & ATA_DFLAG_LBA48))
1517 goto out_of_range;
07506697
AL		 1518
1519 /* use LBA48 */
1520 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1521 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1522
8bf62ece 1523 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1524
8bf62ece
AL		 1525 tf->hob_lbah = (block >> 40) & 0xff;
1526 tf->hob_lbam = (block >> 32) & 0xff;
1527 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1528 } else
1529 /* request too large even for LBA48 */
1530 goto out_of_range;
8bf62ece
AL		 1531
1532 tf->nsect = n_block & 0xff;
1da177e4 1533
8bf62ece
AL		 1534 tf->lbah = (block >> 16) & 0xff;
1535 tf->lbam = (block >> 8) & 0xff;
1536 tf->lbal = block & 0xff;
1da177e4 1537
8bf62ece
AL		 1538 tf->device |= ATA_LBA;
1539 } else {
1540 /* CHS */
1541 u32 sect, head, cyl, track;
1542
c6a33e24
AL		 1543 if (!lba_28_ok(block, n_block))
1544 goto out_of_range;
07506697 1545
8bf62ece
AL		 1546 /* Convert LBA to CHS */
1547 track = (u32)block / dev->sectors;
1548 cyl = track / dev->heads;
1549 head = track % dev->heads;
1550 sect = (u32)block % dev->sectors + 1;
1551
c187c4b5
AL		 1552 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1553 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1554
1555 /* Check whether the converted CHS can fit.
1556 Cylinder: 0-65535
8bf62ece
AL		 1557 Head: 0-15
1558 Sector: 1-255*/
2e9edbf8 1559 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1560 goto out_of_range;
2e9edbf8 1561
8bf62ece
AL		 1562 tf->command = ATA_CMD_VERIFY;
1563 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1564 tf->lbal = sect;
1565 tf->lbam = cyl;
1566 tf->lbah = cyl >> 8;
1567 tf->device |= head;
1568 }
1da177e4
LT		 1569
1570 return 0;
ae006510
DG		 1571
1572invalid_fld:
542b1444 1573 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1574 /* "Invalid field in cbd" */
1575 return 1;
1576
1577out_of_range:
542b1444 1578 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1579 /* "Logical Block Address out of range" */
1580 return 1;
1581
1582nothing_to_do:
542b1444 1583 scmd->result = SAM_STAT_GOOD;
ae006510 1584 return 1;
1da177e4
LT		 1585}
1586
1587/**
1588 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1589 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1590 *
1591 * Converts any of six SCSI read/write commands into the
1592 * ATA counterpart, including starting sector (LBA),
1593 * sector count, and taking into account the device's LBA48
1594 * support.
1595 *
1596 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1597 * %WRITE_16 are currently supported.
1598 *
1599 * LOCKING:
cca3974e 1600 * spin_lock_irqsave(host lock)
1da177e4
LT		 1601 *
1602 * RETURNS:
1603 * Zero on success, non-zero on error.
1604 */
ad706991 1605static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1606{
542b1444 1607 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1608 const u8 *cdb = scmd->cmnd;
bd056d7e 1609 unsigned int tf_flags = 0;
3aef5231
AL		 1610 u64 block;
1611 u32 n_block;
bd056d7e 1612 int rc;
1da177e4 1613
542b1444 1614 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1615 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1616
9a3dccc4 1617 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1618 switch (cdb[0]) {
3aef5231
AL		 1619 case READ_10:
1620 case WRITE_10:
2e5704f6
TH		 1621 if (unlikely(scmd->cmd_len < 10))
1622 goto invalid_fld;
542b1444
TH		 1623 scsi_10_lba_len(cdb, &block, &n_block);
1624 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1625 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1626 break;
1627 case READ_6:
1628 case WRITE_6:
2e5704f6
TH		 1629 if (unlikely(scmd->cmd_len < 6))
1630 goto invalid_fld;
542b1444 1631 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1632
1633 /* for 6-byte r/w commands, transfer length 0
1634 * means 256 blocks of data, not 0 block.
1635 */
76b2bf9b
JG		 1636 if (!n_block)
1637 n_block = 256;
3aef5231
AL		 1638 break;
1639 case READ_16:
1640 case WRITE_16:
2e5704f6
TH		 1641 if (unlikely(scmd->cmd_len < 16))
1642 goto invalid_fld;
542b1444
TH		 1643 scsi_16_lba_len(cdb, &block, &n_block);
1644 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1645 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1646 break;
1647 default:
8bf62ece 1648 DPRINTK("no-byte command\n");
ae006510 1649 goto invalid_fld;
1da177e4
LT		 1650 }
1651
8bf62ece
AL		 1652 /* Check and compose ATA command */
1653 if (!n_block)
c187c4b5
AL		 1654 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1655 * length 0 means transfer 0 block of data.
1656 * However, for ATA R/W commands, sector count 0 means
1657 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1658 *
1659 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1660 */
ae006510 1661 goto nothing_to_do;
1da177e4 1662
bd056d7e 1663 qc->flags |= ATA_QCFLAG_IO;
726f0785 1664 qc->nbytes = n_block * ATA_SECT_SIZE;
1da177e4 1665
bd056d7e
TH		 1666 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1667 qc->tag);
1668 if (likely(rc == 0))
1669 return 0;
ae006510 1670
bd056d7e
TH		 1671 if (rc == -ERANGE)
1672 goto out_of_range;
1673 /* treat all other errors as -EINVAL, fall through */
ae006510 1674invalid_fld:
542b1444 1675 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1676 /* "Invalid field in cbd" */
1677 return 1;
1678
1679out_of_range:
542b1444 1680 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1681 /* "Logical Block Address out of range" */
1682 return 1;
1683
1684nothing_to_do:
542b1444 1685 scmd->result = SAM_STAT_GOOD;
ae006510 1686 return 1;
1da177e4
LT		 1687}
1688
77853bf2 1689static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1690{
c31f571d 1691 struct ata_port *ap = qc->ap;
1da177e4 1692 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1693 u8 *cdb = cmd->cmnd;
2dcb407e 1694 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1695
1696 /* For ATA pass thru (SAT) commands, generate a sense block if
1697 * user mandated it or if there's an error. Note that if we
1698 * generate because the user forced us to, a check condition
1699 * is generated and the ATA register values are returned
1700 * whether the command completed successfully or not. If there
1701 * was no error, SK, ASC and ASCQ will all be zero.
1702 */
a7dac447 1703 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1704 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1705 ata_gen_passthru_sense(qc);
b095518e
JG		 1706 } else {
1707 if (!need_sense) {
1708 cmd->result = SAM_STAT_GOOD;
1709 } else {
1710 /* TODO: decide which descriptor format to use
1711 * for 48b LBA devices and call that here
1712 * instead of the fixed desc, which is only
1713 * good for smaller LBA (and maybe CHS?)
1714 * devices.
1715 */
750426aa 1716 ata_gen_ata_sense(qc);
b095518e
JG		 1717 }
1718 }
1da177e4 1719
d9aca22c 1720 /* XXX: track spindown state for spindown skipping and warning */
13b8d09f
TH		 1721 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1722 qc->tf.command == ATA_CMD_STANDBYNOW1))
1723 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1724 else if (likely(system_state != SYSTEM_HALT &&
1725 system_state != SYSTEM_POWER_OFF))
1726 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1727
c31f571d 1728 if (need_sense && !ap->ops->error_handler)
44877b4e 1729 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1730
1731 qc->scsidone(cmd);
1732
77853bf2 1733 ata_qc_free(qc);
1da177e4
LT		 1734}
1735
1736/**
1737 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1738 * @dev: ATA device to which the command is addressed
1739 * @cmd: SCSI command to execute
1740 * @done: SCSI command completion function
1741 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1742 *
1743 * Our ->queuecommand() function has decided that the SCSI
1744 * command issued can be directly translated into an ATA
1745 * command, rather than handled internally.
1746 *
1747 * This function sets up an ata_queued_cmd structure for the
1748 * SCSI command, and sends that ata_queued_cmd to the hardware.
1749 *
ae006510
DG		 1750 * The xlat_func argument (actor) returns 0 if ready to execute
1751 * ATA command, else 1 to finish translation. If 1 is returned
1752 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1753 * to be set reflecting an error condition or clean (early)
1754 * termination.
1755 *
1da177e4 1756 * LOCKING:
cca3974e 1757 * spin_lock_irqsave(host lock)
2115ea94
TH		 1758 *
1759 * RETURNS:
1760 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1761 * needs to be deferred.
1da177e4 1762 */
2115ea94
TH		 1763static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1764 void (*done)(struct scsi_cmnd *),
1765 ata_xlat_func_t xlat_func)
1da177e4 1766{
31cc23b3 1767 struct ata_port *ap = dev->link->ap;
1da177e4 1768 struct ata_queued_cmd *qc;
31cc23b3 1769 int rc;
1da177e4
LT		 1770
1771 VPRINTK("ENTER\n");
1772
3373efd8 1773 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1774 if (!qc)
ae006510 1775 goto err_mem;
1da177e4
LT		 1776
1777 /* data is present; dma-map it */
be7db055
CH		 1778 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1779 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1780 if (unlikely(scsi_bufflen(cmd) < 1)) {
f15a1daf
TH		 1781 ata_dev_printk(dev, KERN_WARNING,
1782 "WARNING: zero len r/w req\n");
ae006510 1783 goto err_did;
1da177e4
LT		 1784 }
1785
7120165c 1786 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1787
1788 qc->dma_dir = cmd->sc_data_direction;
1789 }
1790
1791 qc->complete_fn = ata_scsi_qc_complete;
1792
ad706991 1793 if (xlat_func(qc))
ae006510 1794 goto early_finish;
1da177e4 1795
31cc23b3
TH		 1796 if (ap->ops->qc_defer) {
1797 if ((rc = ap->ops->qc_defer(qc)))
1798 goto defer;
1799 }
1800
1da177e4 1801 /* select device, send command to hardware */
8e0e694a 1802 ata_qc_issue(qc);
1da177e4
LT		 1803
1804 VPRINTK("EXIT\n");
2115ea94 1805 return 0;
1da177e4 1806
ae006510 1807early_finish:
2dcb407e 1808 ata_qc_free(qc);
da071b42 1809 qc->scsidone(cmd);
ae006510 1810 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1811 return 0;
ae006510
DG		 1812
1813err_did:
1da177e4 1814 ata_qc_free(qc);
ae006510 1815 cmd->result = (DID_ERROR << 16);
da071b42 1816 qc->scsidone(cmd);
253b92ec 1817err_mem:
ae006510 1818 DPRINTK("EXIT - internal\n");
2115ea94 1819 return 0;
3dc1d881
TH		 1820
1821defer:
31cc23b3 1822 ata_qc_free(qc);
3dc1d881 1823 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1824 if (rc == ATA_DEFER_LINK)
1825 return SCSI_MLQUEUE_DEVICE_BUSY;
1826 else
1827 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1828}
1829
1830/**
1831 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1832 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1833 * @flags: unsigned long variable to store irq enable status
1834 * @copy_in: copy in from user buffer
1da177e4 1835 *
87340e98 1836 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1837 *
1838 * LOCKING:
87340e98 1839 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1840 *
1841 * RETURNS:
87340e98 1842 * Pointer to response buffer.
1da177e4 1843 */
87340e98
TH		 1844static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1845 unsigned long *flags)
1da177e4 1846{
87340e98 1847 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1848
87340e98
TH		 1849 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1850 if (copy_in)
1851 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1852 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1853 return ata_scsi_rbuf;
1da177e4
LT		 1854}
1855
1856/**
1857 * ata_scsi_rbuf_put - Unmap response buffer.
1858 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1859 * @copy_out: copy out result
1860 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1861 *
87340e98
TH		 1862 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1863 * @copy_back is true.
1da177e4
LT		 1864 *
1865 * LOCKING:
87340e98 1866 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1867 */
87340e98
TH		 1868static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1869 unsigned long *flags)
1da177e4 1870{
87340e98
TH		 1871 if (copy_out)
1872 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1873 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1874 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1875}
1876
1877/**
1878 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1879 * @args: device IDENTIFY data / SCSI command of interest.
1880 * @actor: Callback hook for desired SCSI command simulator
1881 *
1882 * Takes care of the hard work of simulating a SCSI command...
1883 * Mapping the response buffer, calling the command's handler,
1884 * and handling the handler's return value. This return value
1885 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1886 * completed successfully (0), or not (in which case cmd->result
1887 * and sense buffer are assumed to be set).
1da177e4
LT		 1888 *
1889 * LOCKING:
cca3974e 1890 * spin_lock_irqsave(host lock)
1da177e4 1891 */
f0761be3 1892static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1893 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1894{
1895 u8 *rbuf;
87340e98 1896 unsigned int rc;
1da177e4 1897 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1898 unsigned long flags;
1899
87340e98
TH		 1900 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1901 rc = actor(args, rbuf);
1902 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1903
ae006510 1904 if (rc == 0)
1da177e4 1905 cmd->result = SAM_STAT_GOOD;
ae006510 1906 args->done(cmd);
1da177e4
LT		 1907}
1908
1909/**
1910 * ata_scsiop_inq_std - Simulate INQUIRY command
1911 * @args: device IDENTIFY data / SCSI command of interest.
1912 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1913 *
1914 * Returns standard device identification data associated
b142eb65 1915 * with non-VPD INQUIRY command output.
1da177e4
LT		 1916 *
1917 * LOCKING:
cca3974e 1918 * spin_lock_irqsave(host lock)
1da177e4 1919 */
87340e98 1920static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1921{
87340e98
TH		 1922 const u8 versions[] = {
1923 0x60, /* SAM-3 (no version claimed) */
1924
1925 0x03,
1926 0x20, /* SBC-2 (no version claimed) */
1927
1928 0x02,
1929 0x60 /* SPC-3 (no version claimed) */
1930 };
1da177e4
LT		 1931 u8 hdr[] = {
1932 TYPE_DISK,
1933 0,
1934 0x5, /* claim SPC-3 version compatibility */
1935 2,
1936 95 - 4
1937 };
1938
87340e98
TH		 1939 VPRINTK("ENTER\n");
1940
1da177e4
LT		 1941 /* set scsi removeable (RMB) bit per ata bit */
1942 if (ata_id_removeable(args->id))
1943 hdr[1] |= (1 << 7);
1944
1da177e4 1945 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1946 memcpy(&rbuf[8], "ATA ", 8);
1947 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1948 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1949
87340e98
TH		 1950 if (rbuf[32] == 0 || rbuf[32] == ' ')
1951 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1952
87340e98 1953 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 1954
1955 return 0;
1956}
1957
1958/**
b142eb65 1959 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1960 * @args: device IDENTIFY data / SCSI command of interest.
1961 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 1962 *
b142eb65 1963 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1964 *
1965 * LOCKING:
cca3974e 1966 * spin_lock_irqsave(host lock)
1da177e4 1967 */
87340e98 1968static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1969{
1970 const u8 pages[] = {
1971 0x00, /* page 0x00, this page */
1972 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 1973 0x83, /* page 0x83, device ident page */
1974 0x89, /* page 0x89, ata info page */
1975 0xb1, /* page 0xb1, block device characteristics page */
1da177e4 1976 };
1da177e4 1977
87340e98
TH		 1978 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1979 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 1980 return 0;
1981}
1982
1983/**
b142eb65 1984 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1985 * @args: device IDENTIFY data / SCSI command of interest.
1986 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1987 *
1988 * Returns ATA device serial number.
1989 *
1990 * LOCKING:
cca3974e 1991 * spin_lock_irqsave(host lock)
1da177e4 1992 */
87340e98 1993static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 1994{
1995 const u8 hdr[] = {
1996 0,
1997 0x80, /* this page code */
1998 0,
a0cf733b 1999 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2000 };
1da177e4 2001
87340e98
TH		 2002 memcpy(rbuf, hdr, sizeof(hdr));
2003 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2004 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2005 return 0;
2006}
2007
1da177e4 2008/**
b142eb65 2009 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2010 * @args: device IDENTIFY data / SCSI command of interest.
2011 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2012 *
b142eb65
JG		 2013 * Yields two logical unit device identification designators:
2014 * - vendor specific ASCII containing the ATA serial number
2015 * - SAT defined "t10 vendor id based" containing ASCII vendor
2016 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2017 *
2018 * LOCKING:
cca3974e 2019 * spin_lock_irqsave(host lock)
1da177e4 2020 */
87340e98 2021static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2022{
b142eb65 2023 const int sat_model_serial_desc_len = 68;
87340e98 2024 int num;
1da177e4 2025
b142eb65
JG		 2026 rbuf[1] = 0x83; /* this page code */
2027 num = 4;
2028
87340e98
TH		 2029 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2030 rbuf[num + 0] = 2;
2031 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2032 num += 4;
2033 ata_id_string(args->id, (unsigned char *) rbuf + num,
2034 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2035 num += ATA_ID_SERNO_LEN;
2036
2037 /* SAT defined lu model and serial numbers descriptor */
2038 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2039 rbuf[num + 0] = 2;
2040 rbuf[num + 1] = 1;
2041 rbuf[num + 3] = sat_model_serial_desc_len;
2042 num += 4;
2043 memcpy(rbuf + num, "ATA ", 8);
2044 num += 8;
2045 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2046 ATA_ID_PROD_LEN);
2047 num += ATA_ID_PROD_LEN;
2048 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2049 ATA_ID_SERNO_LEN);
2050 num += ATA_ID_SERNO_LEN;
2051
b142eb65 2052 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2053 return 0;
2054}
2055
ad355b46
JG		 2056/**
2057 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2058 * @args: device IDENTIFY data / SCSI command of interest.
2059 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2060 *
2061 * Yields SAT-specified ATA VPD page.
2062 *
2063 * LOCKING:
2064 * spin_lock_irqsave(host lock)
2065 */
87340e98 2066static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2067{
ad355b46 2068 struct ata_taskfile tf;
ad355b46 2069
ad355b46
JG		 2070 memset(&tf, 0, sizeof(tf));
2071
87340e98
TH		 2072 rbuf[1] = 0x89; /* our page code */
2073 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2074 rbuf[3] = (0x238 & 0xff);
ad355b46 2075
87340e98
TH		 2076 memcpy(&rbuf[8], "linux ", 8);
2077 memcpy(&rbuf[16], "libata ", 16);
2078 memcpy(&rbuf[32], DRV_VERSION, 4);
2079 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2080
2081 /* we don't store the ATA device signature, so we fake it */
2082
2083 tf.command = ATA_DRDY; /* really, this is Status reg */
2084 tf.lbal = 0x1;
2085 tf.nsect = 0x1;
2086
87340e98
TH		 2087 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2088 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2089
87340e98 2090 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2091
87340e98 2092 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2093 return 0;
2094}
2095
1e9dbc92
MW		 2096static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2097{
2098 rbuf[1] = 0xb1;
2099 rbuf[3] = 0x3c;
2100 if (ata_id_major_version(args->id) > 7) {
2101 rbuf[4] = args->id[217] >> 8;
2102 rbuf[5] = args->id[217];
2103 rbuf[7] = args->id[168] & 0xf;
2104 }
2105
2106 return 0;
2107}
2108
1da177e4 2109/**
0cba632b 2110 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2111 * @args: device IDENTIFY data / SCSI command of interest.
2112 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2113 *
2114 * No operation. Simply returns success to caller, to indicate
2115 * that the caller should successfully complete this SCSI command.
2116 *
2117 * LOCKING:
cca3974e 2118 * spin_lock_irqsave(host lock)
1da177e4 2119 */
87340e98 2120static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2121{
2122 VPRINTK("ENTER\n");
2123 return 0;
2124}
2125
1da177e4
LT		 2126/**
2127 * ata_msense_caching - Simulate MODE SENSE caching info page
2128 * @id: device IDENTIFY data
87340e98 2129 * @buf: output buffer
1da177e4
LT		 2130 *
2131 * Generate a caching info page, which conditionally indicates
2132 * write caching to the SCSI layer, depending on device
2133 * capabilities.
2134 *
2135 * LOCKING:
2136 * None.
2137 */
87340e98 2138static unsigned int ata_msense_caching(u16 *id, u8 *buf)
1da177e4 2139{
87340e98 2140 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
1da177e4 2141 if (ata_id_wcache_enabled(id))
87340e98 2142 buf[2] |= (1 << 2); /* write cache enable */
1da177e4 2143 if (!ata_id_rahead_enabled(id))
87340e98
TH		 2144 buf[12] |= (1 << 5); /* disable read ahead */
2145 return sizeof(def_cache_mpage);
1da177e4
LT		 2146}
2147
2148/**
2149 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2150 * @buf: output buffer
1da177e4
LT		 2151 *
2152 * Generate a generic MODE SENSE control mode page.
2153 *
2154 * LOCKING:
2155 * None.
2156 */
87340e98 2157static unsigned int ata_msense_ctl_mode(u8 *buf)
1da177e4 2158{
87340e98 2159 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
00ac37f5 2160 return sizeof(def_control_mpage);
1da177e4
LT		 2161}
2162
2163/**
2164 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2165 * @buf: output buffer
1da177e4
LT		 2166 *
2167 * Generate a generic MODE SENSE r/w error recovery page.
2168 *
2169 * LOCKING:
2170 * None.
2171 */
87340e98 2172static unsigned int ata_msense_rw_recovery(u8 *buf)
1da177e4 2173{
87340e98 2174 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
00ac37f5 2175 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2176}
2177
48bdc8ec
JA		 2178/*
2179 * We can turn this into a real blacklist if it's needed, for now just
2180 * blacklist any Maxtor BANC1G10 revision firmware
2181 */
2182static int ata_dev_supports_fua(u16 *id)
2183{
a0cf733b 2184 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2185
c3c013a2
JG		 2186 if (!libata_fua)
2187 return 0;
48bdc8ec
JA		 2188 if (!ata_id_has_fua(id))
2189 return 0;
2190
a0cf733b
TH		 2191 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2192 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2193
2e02671d 2194 if (strcmp(model, "Maxtor"))
48bdc8ec 2195 return 1;
2e02671d 2196 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2197 return 1;
2198
2199 return 0; /* blacklisted */
2200}
2201
1da177e4
LT		 2202/**
2203 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2204 * @args: device IDENTIFY data / SCSI command of interest.
2205 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2206 *
00ac37f5
DG		 2207 * Simulate MODE SENSE commands. Assume this is invoked for direct
2208 * access devices (e.g. disks) only. There should be no block
2209 * descriptor for other device types.
1da177e4
LT		 2210 *
2211 * LOCKING:
cca3974e 2212 * spin_lock_irqsave(host lock)
1da177e4 2213 */
87340e98 2214static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2215{
9a3dccc4 2216 struct ata_device *dev = args->dev;
87340e98 2217 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2218 const u8 sat_blk_desc[] = {
2219 0, 0, 0, 0, /* number of blocks: sat unspecified */
2220 0,
2221 0, 0x2, 0x0 /* block length: 512 bytes */
2222 };
2223 u8 pg, spg;
87340e98 2224 unsigned int ebd, page_control, six_byte;
9a3dccc4 2225 u8 dpofua;
1da177e4
LT		 2226
2227 VPRINTK("ENTER\n");
2228
2229 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2230 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2231 /*
2232 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2233 */
00ac37f5 2234
1da177e4 2235 page_control = scsicmd[2] >> 6;
ae006510
DG		 2236 switch (page_control) {
2237 case 0: /* current */
2238 break; /* supported */
2239 case 3: /* saved */
2240 goto saving_not_supp;
2241 case 1: /* changeable */
2242 case 2: /* defaults */
2243 default:
2244 goto invalid_fld;
2245 }
1da177e4 2246
87340e98
TH		 2247 if (six_byte)
2248 p += 4 + (ebd ? 8 : 0);
2249 else
2250 p += 8 + (ebd ? 8 : 0);
1da177e4 2251
00ac37f5
DG		 2252 pg = scsicmd[2] & 0x3f;
2253 spg = scsicmd[3];
2254 /*
2255 * No mode subpages supported (yet) but asking for _all_
2256 * subpages may be valid
2257 */
2258 if (spg && (spg != ALL_SUB_MPAGES))
2259 goto invalid_fld;
2260
2261 switch(pg) {
2262 case RW_RECOVERY_MPAGE:
87340e98 2263 p += ata_msense_rw_recovery(p);
1da177e4
LT		 2264 break;
2265
00ac37f5 2266 case CACHE_MPAGE:
87340e98 2267 p += ata_msense_caching(args->id, p);
1da177e4
LT		 2268 break;
2269
87340e98
TH		 2270 case CONTROL_MPAGE:
2271 p += ata_msense_ctl_mode(p);
1da177e4 2272 break;
1da177e4 2273
00ac37f5 2274 case ALL_MPAGES:
87340e98
TH		 2275 p += ata_msense_rw_recovery(p);
2276 p += ata_msense_caching(args->id, p);
2277 p += ata_msense_ctl_mode(p);
1da177e4
LT		 2278 break;
2279
2280 default: /* invalid page code */
ae006510 2281 goto invalid_fld;
1da177e4
LT		 2282 }
2283
9a3dccc4 2284 dpofua = 0;
f79d409f 2285 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2286 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2287 dpofua = 1 << 4;
2288
1da177e4 2289 if (six_byte) {
87340e98
TH		 2290 rbuf[0] = p - rbuf - 1;
2291 rbuf[2] |= dpofua;
00ac37f5 2292 if (ebd) {
87340e98
TH		 2293 rbuf[3] = sizeof(sat_blk_desc);
2294 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2295 }
1da177e4 2296 } else {
87340e98
TH		 2297 unsigned int output_len = p - rbuf - 2;
2298
1da177e4 2299 rbuf[0] = output_len >> 8;
87340e98
TH		 2300 rbuf[1] = output_len;
2301 rbuf[3] |= dpofua;
00ac37f5 2302 if (ebd) {
87340e98
TH		 2303 rbuf[7] = sizeof(sat_blk_desc);
2304 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2305 }
1da177e4 2306 }
1da177e4 2307 return 0;
ae006510
DG		 2308
2309invalid_fld:
2310 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2311 /* "Invalid field in cbd" */
2312 return 1;
2313
2314saving_not_supp:
2315 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2316 /* "Saving parameters not supported" */
2317 return 1;
1da177e4
LT		 2318}
2319
2320/**
2321 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2322 * @args: device IDENTIFY data / SCSI command of interest.
2323 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2324 *
2325 * Simulate READ CAPACITY commands.
2326 *
2327 * LOCKING:
6a36261e 2328 * None.
1da177e4 2329 */
87340e98 2330static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2331{
6a36261e 2332 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2333
2334 VPRINTK("ENTER\n");
2335
1da177e4 2336 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2337 if (last_lba >= 0xffffffffULL)
2338 last_lba = 0xffffffff;
0c144d0d 2339
1da177e4 2340 /* sector count, 32-bit */
87340e98
TH		 2341 rbuf[0] = last_lba >> (8 * 3);
2342 rbuf[1] = last_lba >> (8 * 2);
2343 rbuf[2] = last_lba >> (8 * 1);
2344 rbuf[3] = last_lba;
1da177e4
LT		 2345
2346 /* sector size */
87340e98
TH		 2347 rbuf[6] = ATA_SECT_SIZE >> 8;
2348 rbuf[7] = ATA_SECT_SIZE & 0xff;
1da177e4
LT		 2349 } else {
2350 /* sector count, 64-bit */
87340e98
TH		 2351 rbuf[0] = last_lba >> (8 * 7);
2352 rbuf[1] = last_lba >> (8 * 6);
2353 rbuf[2] = last_lba >> (8 * 5);
2354 rbuf[3] = last_lba >> (8 * 4);
2355 rbuf[4] = last_lba >> (8 * 3);
2356 rbuf[5] = last_lba >> (8 * 2);
2357 rbuf[6] = last_lba >> (8 * 1);
2358 rbuf[7] = last_lba;
1da177e4
LT		 2359
2360 /* sector size */
87340e98
TH		 2361 rbuf[10] = ATA_SECT_SIZE >> 8;
2362 rbuf[11] = ATA_SECT_SIZE & 0xff;
1da177e4
LT		 2363 }
2364
2365 return 0;
2366}
2367
2368/**
2369 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2370 * @args: device IDENTIFY data / SCSI command of interest.
2371 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2372 *
2373 * Simulate REPORT LUNS command.
2374 *
2375 * LOCKING:
cca3974e 2376 * spin_lock_irqsave(host lock)
1da177e4 2377 */
87340e98 2378static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2379{
2380 VPRINTK("ENTER\n");
2381 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2382
2383 return 0;
2384}
2385
77853bf2 2386static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2387{
74e6c8c3 2388 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2389 /* FIXME: not quite right; we don't want the
2390 * translation of taskfile registers into
2391 * a sense descriptors, since that's only
2392 * correct for ATA, not ATAPI
2393 */
750426aa 2394 ata_gen_passthru_sense(qc);
74e6c8c3 2395 }
a939c963 2396
c6e6e666 2397 qc->scsidone(qc->scsicmd);
77853bf2 2398 ata_qc_free(qc);
c6e6e666 2399}
a939c963 2400
c6e6e666
JG		 2401/* is it pointless to prefer PIO for "safety reasons"? */
2402static inline int ata_pio_use_silly(struct ata_port *ap)
2403{
2404 return (ap->flags & ATA_FLAG_PIO_DMA);
2405}
2406
2407static void atapi_request_sense(struct ata_queued_cmd *qc)
2408{
2409 struct ata_port *ap = qc->ap;
2410 struct scsi_cmnd *cmd = qc->scsicmd;
2411
2412 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2413
2414 /* FIXME: is this needed? */
7ccd720d 2415 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2416
127102ae 2417#ifdef CONFIG_ATA_SFF
855d854a
JB		 2418 if (ap->ops->sff_tf_read)
2419 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2420#endif
c6e6e666
JG		 2421
2422 /* fill these in, for the case where they are -not- overwritten */
2423 cmd->sense_buffer[0] = 0x70;
2424 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2425
2426 ata_qc_reinit(qc);
2427
93f8fecb 2428 /* setup sg table and init transfer direction */
cadb7345 2429 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2430 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2431 qc->dma_dir = DMA_FROM_DEVICE;
2432
6e7846e9 2433 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2434 qc->cdb[0] = REQUEST_SENSE;
2435 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2436
2437 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2438 qc->tf.command = ATA_CMD_PACKET;
2439
c6e6e666 2440 if (ata_pio_use_silly(ap)) {
0dc36888 2441 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2442 qc->tf.feature |= ATAPI_PKT_DMA;
2443 } else {
0dc36888 2444 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2445 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2446 qc->tf.lbah = 0;
c6e6e666 2447 }
a939c963
JG		 2448 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2449
c6e6e666 2450 qc->complete_fn = atapi_sense_complete;
a939c963 2451
8e0e694a 2452 ata_qc_issue(qc);
a939c963
JG		 2453
2454 DPRINTK("EXIT\n");
2455}
2456
77853bf2 2457static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2458{
2459 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2460 unsigned int err_mask = qc->err_mask;
1da177e4 2461
a7dac447 2462 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2463
246619da
TH		 2464 /* handle completion from new EH */
2465 if (unlikely(qc->ap->ops->error_handler &&
2466 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2467
2468 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2469 /* FIXME: not quite right; we don't want the
2470 * translation of taskfile registers into a
2471 * sense descriptors, since that's only
2472 * correct for ATA, not ATAPI
2473 */
750426aa 2474 ata_gen_passthru_sense(qc);
246619da
TH		 2475 }
2476
22aac089
TH		 2477 /* SCSI EH automatically locks door if sdev->locked is
2478 * set. Sometimes door lock request continues to
2479 * fail, for example, when no media is present. This
2480 * creates a loop - SCSI EH issues door lock which
2481 * fails and gets invoked again to acquire sense data
2482 * for the failed command.
2483 *
2484 * If door lock fails, always clear sdev->locked to
2485 * avoid this infinite loop.
2486 */
2487 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2488 qc->dev->sdev->locked = 0;
2489
246619da
TH		 2490 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2491 qc->scsidone(cmd);
2492 ata_qc_free(qc);
2493 return;
2494 }
2495
2496 /* successful completion or old EH failure path */
a7dac447 2497 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2498 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2499 atapi_request_sense(qc);
77853bf2 2500 return;
74e6c8c3 2501 } else if (unlikely(err_mask)) {
a7dac447
JG		 2502 /* FIXME: not quite right; we don't want the
2503 * translation of taskfile registers into
2504 * a sense descriptors, since that's only
2505 * correct for ATA, not ATAPI
2506 */
750426aa 2507 ata_gen_passthru_sense(qc);
74e6c8c3 2508 } else {
1da177e4
LT		 2509 u8 *scsicmd = cmd->cmnd;
2510
fd71da46 2511 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2512 unsigned long flags;
87340e98 2513 u8 *buf;
b445c568 2514
87340e98 2515 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2516
2517 /* ATAPI devices typically report zero for their SCSI version,
2518 * and sometimes deviate from the spec WRT response data
2519 * format. If SCSI version is reported as zero like normal,
2520 * then we make the following fixups: 1) Fake MMC-5 version,
2521 * to indicate to the Linux scsi midlayer this is a modern
2522 * device. 2) Ensure response data format / ATAPI information
2523 * are always correct.
a15dbeb4
JG		 2524 */
2525 if (buf[2] == 0) {
2526 buf[2] = 0x5;
2527 buf[3] = 0x32;
2528 }
2529
87340e98 2530 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2531 }
a15dbeb4 2532
1da177e4
LT		 2533 cmd->result = SAM_STAT_GOOD;
2534 }
2535
2536 qc->scsidone(cmd);
77853bf2 2537 ata_qc_free(qc);
1da177e4
LT		 2538}
2539/**
2540 * atapi_xlat - Initialize PACKET taskfile
2541 * @qc: command structure to be initialized
1da177e4
LT		 2542 *
2543 * LOCKING:
cca3974e 2544 * spin_lock_irqsave(host lock)
1da177e4
LT		 2545 *
2546 * RETURNS:
2547 * Zero on success, non-zero on failure.
2548 */
ad706991 2549static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2550{
542b1444 2551 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2552 struct ata_device *dev = qc->dev;
542b1444 2553 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2554 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2555 unsigned int nbytes;
1da177e4 2556
2e5704f6
TH		 2557 memset(qc->cdb, 0, dev->cdb_len);
2558 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2559
2560 qc->complete_fn = atapi_qc_complete;
2561
2562 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2563 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2564 qc->tf.flags |= ATA_TFLAG_WRITE;
2565 DPRINTK("direction: write\n");
2566 }
2567
2568 qc->tf.command = ATA_CMD_PACKET;
aacda375 2569 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2570
2571 /* check whether ATAPI DMA is safe */
5895ef9a 2572 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2573 using_pio = 1;
1da177e4 2574
e190222d
TH		 2575 /* Some controller variants snoop this value for Packet
2576 * transfers to do state machine and FIFO management. Thus we
2577 * want to set it properly, and for DMA where it is
2578 * effectively meaningless.
2579 */
aacda375 2580 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2581
e190222d
TH		 2582 /* Most ATAPI devices which honor transfer chunk size don't
2583 * behave according to the spec when odd chunk size which
2584 * matches the transfer length is specified. If the number of
2585 * bytes to transfer is 2n+1. According to the spec, what
2586 * should happen is to indicate that 2n+1 is going to be
2587 * transferred and transfer 2n+2 bytes where the last byte is
2588 * padding.
2589 *
2590 * In practice, this doesn't happen. ATAPI devices first
2591 * indicate and transfer 2n bytes and then indicate and
2592 * transfer 2 bytes where the last byte is padding.
2593 *
2594 * This inconsistency confuses several controllers which
2595 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2596 * These controllers use actual number of transferred bytes to
2597 * update DMA poitner and transfer of 4n+2 bytes make those
2598 * controller push DMA pointer by 4n+4 bytes because SATA data
2599 * FISes are aligned to 4 bytes. This causes data corruption
2600 * and buffer overrun.
2601 *
2602 * Always setting nbytes to even number solves this problem
2603 * because then ATAPI devices don't have to split data at 2n
2604 * boundaries.
2605 */
2606 if (nbytes & 0x1)
2607 nbytes++;
2608
2db78dd3
AC		 2609 qc->tf.lbam = (nbytes & 0xFF);
2610 qc->tf.lbah = (nbytes >> 8);
2611
5895ef9a
TH		 2612 if (nodata)
2613 qc->tf.protocol = ATAPI_PROT_NODATA;
2614 else if (using_pio)
2615 qc->tf.protocol = ATAPI_PROT_PIO;
2616 else {
e00f1ff3 2617 /* DMA data xfer */
0dc36888 2618 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2619 qc->tf.feature |= ATAPI_PKT_DMA;
2620
91163006
TH		 2621 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2622 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2623 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2624 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2625 }
2626
2db78dd3
AC		 2627
2628 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2629 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2630 return 0;
2631}
2632
2dcb407e 2633static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2634{
071f44b1 2635 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2636 if (likely(devno < ata_link_max_devices(&ap->link)))
2637 return &ap->link.device[devno];
2638 } else {
2639 if (likely(devno < ap->nr_pmp_links))
2640 return &ap->pmp_link[devno].device[0];
2641 }
2642
ab5b3a5b
TH		 2643 return NULL;
2644}
2645
2dcb407e
JG		 2646static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2647 const struct scsi_device *scsidev)
ab5b3a5b 2648{
41bda9c9
TH		 2649 int devno;
2650
ab5b3a5b 2651 /* skip commands not addressed to targets we simulate */
071f44b1 2652 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2653 if (unlikely(scsidev->channel || scsidev->lun))
2654 return NULL;
2655 devno = scsidev->id;
2656 } else {
2657 if (unlikely(scsidev->id || scsidev->lun))
2658 return NULL;
2659 devno = scsidev->channel;
2660 }
ab5b3a5b 2661
41bda9c9 2662 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2663}
2664
1da177e4
LT		 2665/**
2666 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2667 * @ap: ATA port to which the device is attached
2668 * @scsidev: SCSI device from which we derive the ATA device
2669 *
2670 * Given various information provided in struct scsi_cmnd,
2671 * map that onto an ATA bus, and using that mapping
2672 * determine which ata_device is associated with the
2673 * SCSI command to be sent.
2674 *
2675 * LOCKING:
cca3974e 2676 * spin_lock_irqsave(host lock)
1da177e4
LT		 2677 *
2678 * RETURNS:
2679 * Associated ATA device, or %NULL if not found.
2680 */
1da177e4 2681static struct ata_device *
057ace5e 2682ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2683{
ab5b3a5b 2684 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2685
2486fa56 2686 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2687 return NULL;
2688
1da177e4
LT		 2689 return dev;
2690}
2691
b095518e
JG		 2692/*
2693 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2694 * @byte1: Byte 1 from pass-thru CDB.
2695 *
2696 * RETURNS:
2697 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2698 */
2699static u8
2700ata_scsi_map_proto(u8 byte1)
2701{
2702 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2703 case 3: /* Non-data */
2704 return ATA_PROT_NODATA;
2705
2706 case 6: /* DMA */
2707 case 10: /* UDMA Data-in */
2708 case 11: /* UDMA Data-Out */
2709 return ATA_PROT_DMA;
2710
2711 case 4: /* PIO Data-in */
2712 case 5: /* PIO Data-out */
2713 return ATA_PROT_PIO;
2714
2715 case 0: /* Hard Reset */
2716 case 1: /* SRST */
2717 case 8: /* Device Diagnostic */
2718 case 9: /* Device Reset */
2719 case 7: /* DMA Queued */
2720 case 12: /* FPDMA */
2721 case 15: /* Return Response Info */
2722 default: /* Reserved */
2723 break;
b095518e
JG		 2724 }
2725
2726 return ATA_PROT_UNKNOWN;
2727}
2728
2729/**
2730 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2731 * @qc: command structure to be initialized
b095518e
JG		 2732 *
2733 * Handles either 12 or 16-byte versions of the CDB.
2734 *
2735 * RETURNS:
2736 * Zero on success, non-zero on failure.
2737 */
ad706991 2738static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2739{
2740 struct ata_taskfile *tf = &(qc->tf);
542b1444 2741 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2742 struct ata_device *dev = qc->dev;
ad706991 2743 const u8 *cdb = scmd->cmnd;
b095518e 2744
542b1444 2745 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2746 goto invalid_fld;
8190bdb9 2747
ae8d4ee7
AC		 2748 /*
2749 * Filter TPM commands by default. These provide an
2750 * essentially uncontrolled encrypted "back door" between
2751 * applications and the disk. Set libata.allow_tpm=1 if you
2752 * have a real reason for wanting to use them. This ensures
2753 * that installed software cannot easily mess stuff up without
2754 * user intent. DVR type users will probably ship with this enabled
2755 * for movie content management.
2756 *
2757 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2758 * for this and should do in future but that it is not sufficient as
2759 * DCS is an optional feature set. Thus we also do the software filter
2760 * so that we comply with the TC consortium stated goal that the user
2761 * can turn off TC features of their system.
2762 */
2763 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2764 goto invalid_fld;
2765
f79d409f
AC		 2766 /* We may not issue DMA commands if no DMA mode is set */
2767 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2768 goto invalid_fld;
b095518e
JG		 2769
2770 /*
2771 * 12 and 16 byte CDBs use different offsets to
2772 * provide the various register values.
2773 */
542b1444 2774 if (cdb[0] == ATA_16) {
b095518e
JG		 2775 /*
2776 * 16-byte CDB - may contain extended commands.
2777 *
2778 * If that is the case, copy the upper byte register values.
2779 */
542b1444
TH		 2780 if (cdb[1] & 0x01) {
2781 tf->hob_feature = cdb[3];
2782 tf->hob_nsect = cdb[5];
2783 tf->hob_lbal = cdb[7];
2784 tf->hob_lbam = cdb[9];
2785 tf->hob_lbah = cdb[11];
b095518e
JG		 2786 tf->flags |= ATA_TFLAG_LBA48;
2787 } else
2788 tf->flags &= ~ATA_TFLAG_LBA48;
2789
2790 /*
2791 * Always copy low byte, device and command registers.
2792 */
542b1444
TH		 2793 tf->feature = cdb[4];
2794 tf->nsect = cdb[6];
2795 tf->lbal = cdb[8];
2796 tf->lbam = cdb[10];
2797 tf->lbah = cdb[12];
2798 tf->device = cdb[13];
2799 tf->command = cdb[14];
b095518e
JG		 2800 } else {
2801 /*
2802 * 12-byte CDB - incapable of extended commands.
2803 */
2804 tf->flags &= ~ATA_TFLAG_LBA48;
2805
542b1444
TH		 2806 tf->feature = cdb[3];
2807 tf->nsect = cdb[4];
2808 tf->lbal = cdb[5];
2809 tf->lbam = cdb[6];
2810 tf->lbah = cdb[7];
2811 tf->device = cdb[8];
2812 tf->command = cdb[9];
b095518e 2813 }
fa4453c4
AL		 2814
2815 /* enforce correct master/slave bit */
2816 tf->device = dev->devno ?
2817 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2818
1dce589c
AL		 2819 /* sanity check for pio multi commands */
2820 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2821 goto invalid_fld;
2822
2823 if (is_multi_taskfile(tf)) {
2824 unsigned int multi_count = 1 << (cdb[1] >> 5);
2825
2826 /* compare the passed through multi_count
2827 * with the cached multi_count of libata
2828 */
2829 if (multi_count != dev->multi_count)
2830 ata_dev_printk(dev, KERN_WARNING,
2831 "invalid multi_count %u ignored\n",
2832 multi_count);
d26fc955 2833 }
1dce589c 2834
5a5dbd18
ML		 2835 /* READ/WRITE LONG use a non-standard sect_size */
2836 qc->sect_size = ATA_SECT_SIZE;
2837 switch (tf->command) {
2838 case ATA_CMD_READ_LONG:
2839 case ATA_CMD_READ_LONG_ONCE:
2840 case ATA_CMD_WRITE_LONG:
2841 case ATA_CMD_WRITE_LONG_ONCE:
2842 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2843 goto invalid_fld;
7120165c 2844 qc->sect_size = scsi_bufflen(scmd);
5a5dbd18
ML		 2845 }
2846
b095518e
JG		 2847 /*
2848 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2849 * SET_FEATURES - XFER MODE must be preceded/succeeded
2850 * by an update to hardware-specific registers for each
2851 * controller (i.e. the reason for ->set_piomode(),
2852 * ->set_dmamode(), and ->post_set_mode() hooks).
2853 */
2854 if ((tf->command == ATA_CMD_SET_FEATURES)
2855 && (tf->feature == SETFEATURES_XFER))
9a405257 2856 goto invalid_fld;
b095518e
JG		 2857
2858 /*
2859 * Set flags so that all registers will be written,
2860 * and pass on write indication (used for PIO/DMA
2861 * setup.)
2862 */
2863 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2864
542b1444 2865 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2866 tf->flags |= ATA_TFLAG_WRITE;
2867
2868 /*
2869 * Set transfer length.
2870 *
2871 * TODO: find out if we need to do more here to
2872 * cover scatter/gather case.
2873 */
aacda375 2874 ata_qc_set_pc_nbytes(qc);
b095518e 2875
e027bd36
TH		 2876 /* request result TF and be quiet about device error */
2877 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
e61e0672 2878
b095518e 2879 return 0;
9a405257
TH		 2880
2881 invalid_fld:
542b1444 2882 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2883 /* "Invalid field in cdb" */
2884 return 1;
b095518e
JG		 2885}
2886
1da177e4
LT		 2887/**
2888 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2889 * @dev: ATA device
2890 * @cmd: SCSI command opcode to consider
2891 *
2892 * Look up the SCSI command given, and determine whether the
2893 * SCSI command is to be translated or simulated.
2894 *
2895 * RETURNS:
2896 * Pointer to translation function if possible, %NULL if not.
2897 */
2898
2899static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2900{
2901 switch (cmd) {
2902 case READ_6:
2903 case READ_10:
2904 case READ_16:
2905
2906 case WRITE_6:
2907 case WRITE_10:
2908 case WRITE_16:
2909 return ata_scsi_rw_xlat;
2910
2911 case SYNCHRONIZE_CACHE:
2912 if (ata_try_flush_cache(dev))
2913 return ata_scsi_flush_xlat;
2914 break;
2915
2916 case VERIFY:
2917 case VERIFY_16:
2918 return ata_scsi_verify_xlat;
b095518e
JG		 2919
2920 case ATA_12:
2921 case ATA_16:
2922 return ata_scsi_pass_thru;
da61396d 2923
972dcafb
DG		 2924 case START_STOP:
2925 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2926 }
2927
2928 return NULL;
2929}
2930
2931/**
2932 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2933 * @ap: ATA port to which the command was being sent
2934 * @cmd: SCSI command to dump
2935 *
2936 * Prints the contents of a SCSI command via printk().
2937 */
2938
2939static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2940 struct scsi_cmnd *cmd)
2941{
2942#ifdef ATA_DEBUG
2943 struct scsi_device *scsidev = cmd->device;
2944 u8 *scsicmd = cmd->cmnd;
2945
2946 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2947 ap->print_id,
1da177e4
LT		 2948 scsidev->channel, scsidev->id, scsidev->lun,
2949 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2950 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2951 scsicmd[8]);
2952#endif
2953}
2954
542b1444 2955static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 2956 void (*done)(struct scsi_cmnd *),
2957 struct ata_device *dev)
eb3f0f9c 2958{
baf4fdfa
ML		 2959 u8 scsi_op = scmd->cmnd[0];
2960 ata_xlat_func_t xlat_func;
2115ea94
TH		 2961 int rc = 0;
2962
eb3f0f9c 2963 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 2964 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2965 goto bad_cdb_len;
eb3f0f9c 2966
baf4fdfa
ML		 2967 xlat_func = ata_get_xlat_func(dev, scsi_op);
2968 } else {
2969 if (unlikely(!scmd->cmd_len))
2970 goto bad_cdb_len;
2971
2972 xlat_func = NULL;
2973 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2974 /* relay SCSI command to ATAPI device */
607126c2
ML		 2975 int len = COMMAND_SIZE(scsi_op);
2976 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 2977 goto bad_cdb_len;
2978
2979 xlat_func = atapi_xlat;
2980 } else {
2981 /* ATA_16 passthru, treat as an ATA command */
2982 if (unlikely(scmd->cmd_len > 16))
2983 goto bad_cdb_len;
2984
2985 xlat_func = ata_get_xlat_func(dev, scsi_op);
2986 }
2987 }
2988
2989 if (xlat_func)
2990 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2991 else
2992 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 2993
2994 return rc;
baf4fdfa
ML		 2995
2996 bad_cdb_len:
2997 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2998 scmd->cmd_len, scsi_op, dev->cdb_len);
2999 scmd->result = DID_ERROR << 16;
3000 done(scmd);
3001 return 0;
eb3f0f9c
BK		 3002}
3003
1da177e4
LT		 3004/**
3005 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3006 * @cmd: SCSI command to be sent
3007 * @done: Completion function, called when command is complete
3008 *
3009 * In some cases, this function translates SCSI commands into
3010 * ATA taskfiles, and queues the taskfiles to be sent to
3011 * hardware. In other cases, this function simulates a
3012 * SCSI device by evaluating and responding to certain
3013 * SCSI commands. This creates the overall effect of
3014 * ATA and ATAPI devices appearing as SCSI devices.
3015 *
3016 * LOCKING:
cca3974e 3017 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 3018 *
3019 * RETURNS:
2115ea94
TH		 3020 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3021 * 0 otherwise.
1da177e4 3022 */
1da177e4
LT		 3023int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3024{
3025 struct ata_port *ap;
3026 struct ata_device *dev;
3027 struct scsi_device *scsidev = cmd->device;
005a5a06 3028 struct Scsi_Host *shost = scsidev->host;
2115ea94 3029 int rc = 0;
1da177e4 3030
35bb94b1 3031 ap = ata_shost_to_port(shost);
005a5a06
JG		 3032
3033 spin_unlock(shost->host_lock);
ba6a1308 3034 spin_lock(ap->lock);
1da177e4
LT		 3035
3036 ata_scsi_dump_cdb(ap, cmd);
3037
3038 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3039 if (likely(dev))
2115ea94 3040 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 3041 else {
1da177e4
LT		 3042 cmd->result = (DID_BAD_TARGET << 16);
3043 done(cmd);
1da177e4
LT		 3044 }
3045
ba6a1308 3046 spin_unlock(ap->lock);
005a5a06 3047 spin_lock(shost->host_lock);
2115ea94 3048 return rc;
1da177e4
LT		 3049}
3050
3051/**
3052 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3053 * @dev: the target device
1da177e4
LT		 3054 * @cmd: SCSI command being sent to device.
3055 * @done: SCSI command completion function.
3056 *
3057 * Interprets and directly executes a select list of SCSI commands
3058 * that can be handled internally.
3059 *
3060 * LOCKING:
cca3974e 3061 * spin_lock_irqsave(host lock)
1da177e4
LT		 3062 */
3063
3373efd8 3064void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 3065 void (*done)(struct scsi_cmnd *))
3066{
3067 struct ata_scsi_args args;
057ace5e 3068 const u8 *scsicmd = cmd->cmnd;
45394145 3069 u8 tmp8;
1da177e4 3070
9a3dccc4
TH		 3071 args.dev = dev;
3072 args.id = dev->id;
1da177e4
LT		 3073 args.cmd = cmd;
3074 args.done = done;
3075
3076 switch(scsicmd[0]) {
2dcb407e
JG		 3077 /* TODO: worth improving? */
3078 case FORMAT_UNIT:
3079 ata_scsi_invalid_field(cmd, done);
3080 break;
3081
3082 case INQUIRY:
3083 if (scsicmd[1] & 2) /* is CmdDt set? */
00bd0202 3084 ata_scsi_invalid_field(cmd, done);
2dcb407e
JG		 3085 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3086 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3087 else switch (scsicmd[2]) {
3088 case 0x00:
3089 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3090 break;
2dcb407e
JG		 3091 case 0x80:
3092 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3093 break;
2dcb407e
JG		 3094 case 0x83:
3095 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3096 break;
2dcb407e
JG		 3097 case 0x89:
3098 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3099 break;
1e9dbc92
MW		 3100 case 0xb1:
3101 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3102 break;
2dcb407e 3103 default:
ae006510 3104 ata_scsi_invalid_field(cmd, done);
1da177e4 3105 break;
2dcb407e
JG		 3106 }
3107 break;
3108
3109 case MODE_SENSE:
3110 case MODE_SENSE_10:
3111 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3112 break;
3113
3114 case MODE_SELECT: /* unconditionally return */
3115 case MODE_SELECT_10: /* bad-field-in-cdb */
3116 ata_scsi_invalid_field(cmd, done);
3117 break;
1da177e4 3118
2dcb407e
JG		 3119 case READ_CAPACITY:
3120 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3121 break;
3122
3123 case SERVICE_ACTION_IN:
3124 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3125 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e
JG		 3126 else
3127 ata_scsi_invalid_field(cmd, done);
3128 break;
1da177e4 3129
2dcb407e
JG		 3130 case REPORT_LUNS:
3131 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3132 break;
1da177e4 3133
2dcb407e
JG		 3134 case REQUEST_SENSE:
3135 ata_scsi_set_sense(cmd, 0, 0, 0);
3136 cmd->result = (DRIVER_SENSE << 24);
3137 done(cmd);
3138 break;
1da177e4 3139
2dcb407e
JG		 3140 /* if we reach this, then writeback caching is disabled,
3141 * turning this into a no-op.
3142 */
3143 case SYNCHRONIZE_CACHE:
3144 /* fall through */
3145
3146 /* no-op's, complete with success */
3147 case REZERO_UNIT:
3148 case SEEK_6:
3149 case SEEK_10:
3150 case TEST_UNIT_READY:
3151 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3152 break;
45394145 3153
2dcb407e
JG		 3154 case SEND_DIAGNOSTIC:
3155 tmp8 = scsicmd[1] & ~(1 << 3);
3156 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3157 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e
JG		 3158 else
3159 ata_scsi_invalid_field(cmd, done);
3160 break;
1da177e4 3161
2dcb407e
JG		 3162 /* all other commands */
3163 default:
3164 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3165 /* "Invalid command operation code" */
3166 done(cmd);
3167 break;
1da177e4
LT		 3168 }
3169}
3170
f3187195
TH		 3171int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3172{
3173 int i, rc;
3174
3175 for (i = 0; i < host->n_ports; i++) {
3176 struct ata_port *ap = host->ports[i];
3177 struct Scsi_Host *shost;
3178
3179 rc = -ENOMEM;
3180 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3181 if (!shost)
3182 goto err_alloc;
3183
3184 *(struct ata_port **)&shost->hostdata[0] = ap;
3185 ap->scsi_host = shost;
3186
3187 shost->transportt = &ata_scsi_transport_template;
3188 shost->unique_id = ap->print_id;
3189 shost->max_id = 16;
3190 shost->max_lun = 1;
3191 shost->max_channel = 1;
3192 shost->max_cmd_len = 16;
3193
31cc23b3
TH		 3194 /* Schedule policy is determined by ->qc_defer()
3195 * callback and it needs to see every deferred qc.
3196 * Set host_blocked to 1 to prevent SCSI midlayer from
3197 * automatically deferring requests.
3198 */
3199 shost->max_host_blocked = 1;
3200
f3187195
TH		 3201 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3202 if (rc)
3203 goto err_add;
3204 }
3205
3206 return 0;
3207
3208 err_add:
3209 scsi_host_put(host->ports[i]->scsi_host);
3210 err_alloc:
3211 while (--i >= 0) {
3212 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3213
3214 scsi_remove_host(shost);
3215 scsi_host_put(shost);
3216 }
3217 return rc;
3218}
3219
1ae46317 3220void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3221{
1ae46317
TH		 3222 int tries = 5;
3223 struct ata_device *last_failed_dev = NULL;
41bda9c9 3224 struct ata_link *link;
1ae46317 3225 struct ata_device *dev;
644dd0cc 3226
198e0fed 3227 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 3228 return;
3229
1ae46317 3230 repeat:
41bda9c9
TH		 3231 ata_port_for_each_link(link, ap) {
3232 ata_link_for_each_dev(dev, link) {
3233 struct scsi_device *sdev;
3234 int channel = 0, id = 0;
3edebac4 3235
41bda9c9
TH		 3236 if (!ata_dev_enabled(dev) || dev->sdev)
3237 continue;
3f19ee8c 3238
41bda9c9
TH		 3239 if (ata_is_host_link(link))
3240 id = dev->devno;
3241 else
3242 channel = link->pmp;
3243
3244 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3245 NULL);
3246 if (!IS_ERR(sdev)) {
3247 dev->sdev = sdev;
3248 scsi_device_put(sdev);
3249 }
3edebac4 3250 }
3f19ee8c 3251 }
1ae46317
TH		 3252
3253 /* If we scanned while EH was in progress or allocation
3254 * failure occurred, scan would have failed silently. Check
3255 * whether all devices are attached.
3256 */
41bda9c9
TH		 3257 ata_port_for_each_link(link, ap) {
3258 ata_link_for_each_dev(dev, link) {
3259 if (ata_dev_enabled(dev) && !dev->sdev)
3260 goto exit_loop;
3261 }
1ae46317 3262 }
41bda9c9
TH		 3263 exit_loop:
3264 if (!link)
1ae46317
TH		 3265 return;
3266
3267 /* we're missing some SCSI devices */
3268 if (sync) {
3269 /* If caller requested synchrnous scan && we've made
3270 * any progress, sleep briefly and repeat.
3271 */
3272 if (dev != last_failed_dev) {
3273 msleep(100);
3274 last_failed_dev = dev;
3275 goto repeat;
3276 }
3277
3278 /* We might be failing to detect boot device, give it
3279 * a few more chances.
3280 */
3281 if (--tries) {
3282 msleep(100);
3283 goto repeat;
3284 }
3285
3286 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3287 "failed without making any progress,\n"
3288 " switching to async\n");
3289 }
3290
3291 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3292 round_jiffies_relative(HZ));
644dd0cc 3293}
0ea035a3
TH		 3294
3295/**
3296 * ata_scsi_offline_dev - offline attached SCSI device
3297 * @dev: ATA device to offline attached SCSI device for
3298 *
3299 * This function is called from ata_eh_hotplug() and responsible
3300 * for taking the SCSI device attached to @dev offline. This
cca3974e 3301 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3302 * against clearing.
3303 *
3304 * LOCKING:
cca3974e 3305 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3306 *
3307 * RETURNS:
3308 * 1 if attached SCSI device exists, 0 otherwise.
3309 */
3310int ata_scsi_offline_dev(struct ata_device *dev)
3311{
3312 if (dev->sdev) {
3313 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3314 return 1;
3315 }
3316 return 0;
3317}
580b2102
TH		 3318
3319/**
3320 * ata_scsi_remove_dev - remove attached SCSI device
3321 * @dev: ATA device to remove attached SCSI device for
3322 *
3323 * This function is called from ata_eh_scsi_hotplug() and
3324 * responsible for removing the SCSI device attached to @dev.
3325 *
3326 * LOCKING:
3327 * Kernel thread context (may sleep).
3328 */
3329static void ata_scsi_remove_dev(struct ata_device *dev)
3330{
9af5c9c9 3331 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3332 struct scsi_device *sdev;
3333 unsigned long flags;
3334
3335 /* Alas, we need to grab scan_mutex to ensure SCSI device
3336 * state doesn't change underneath us and thus
3337 * scsi_device_get() always succeeds. The mutex locking can
3338 * be removed if there is __scsi_device_get() interface which
3339 * increments reference counts regardless of device state.
3340 */
cca3974e 3341 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3342 spin_lock_irqsave(ap->lock, flags);
580b2102 3343
cca3974e 3344 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3345 sdev = dev->sdev;
3346 dev->sdev = NULL;
3347
3348 if (sdev) {
3349 /* If user initiated unplug races with us, sdev can go
cca3974e 3350 * away underneath us after the host lock and
580b2102
TH		 3351 * scan_mutex are released. Hold onto it.
3352 */
3353 if (scsi_device_get(sdev) == 0) {
3354 /* The following ensures the attached sdev is
3355 * offline on return from ata_scsi_offline_dev()
3356 * regardless it wins or loses the race
3357 * against this function.
3358 */
3359 scsi_device_set_state(sdev, SDEV_OFFLINE);
3360 } else {
3361 WARN_ON(1);
3362 sdev = NULL;
3363 }
3364 }
3365
ba6a1308 3366 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3367 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3368
3369 if (sdev) {
3370 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3371 sdev->sdev_gendev.bus_id);
3372
3373 scsi_remove_device(sdev);
3374 scsi_device_put(sdev);
3375 }
3376}
3377
41bda9c9
TH		 3378static void ata_scsi_handle_link_detach(struct ata_link *link)
3379{
3380 struct ata_port *ap = link->ap;
3381 struct ata_device *dev;
3382
3383 ata_link_for_each_dev(dev, link) {
3384 unsigned long flags;
3385
3386 if (!(dev->flags & ATA_DFLAG_DETACHED))
3387 continue;
3388
3389 spin_lock_irqsave(ap->lock, flags);
3390 dev->flags &= ~ATA_DFLAG_DETACHED;
3391 spin_unlock_irqrestore(ap->lock, flags);
3392
3393 ata_scsi_remove_dev(dev);
3394 }
3395}
3396
2f294968
KCA		 3397/**
3398 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3399 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3400 *
3401 * Tell the block layer to send a media change notification
3402 * event.
3403 *
3404 * LOCKING:
854c73a2 3405 * spin_lock_irqsave(host lock)
2f294968 3406 */
854c73a2 3407void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3408{
854c73a2 3409 if (dev->sdev)
f26792d5
JG		 3410 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3411 GFP_ATOMIC);
2f294968 3412}
2f294968 3413
580b2102
TH		 3414/**
3415 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3416 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3417 *
3418 * Perform SCSI part of hotplug. It's executed from a separate
3419 * workqueue after EH completes. This is necessary because SCSI
3420 * hot plugging requires working EH and hot unplugging is
3421 * synchronized with hot plugging with a mutex.
3422 *
3423 * LOCKING:
3424 * Kernel thread context (may sleep).
3425 */
65f27f38 3426void ata_scsi_hotplug(struct work_struct *work)
580b2102 3427{
65f27f38
DH		 3428 struct ata_port *ap =
3429 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3430 int i;
580b2102 3431
b51e9e5d 3432 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3433 DPRINTK("ENTER/EXIT - unloading\n");
3434 return;
3435 }
3436
3437 DPRINTK("ENTER\n");
3438
41bda9c9
TH		 3439 /* Unplug detached devices. We cannot use link iterator here
3440 * because PMP links have to be scanned even if PMP is
3441 * currently not attached. Iterate manually.
3442 */
3443 ata_scsi_handle_link_detach(&ap->link);
3444 if (ap->pmp_link)
3445 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3446 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3447
3448 /* scan for new ones */
1ae46317 3449 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3450
3451 DPRINTK("EXIT\n");
3452}
83c47bcb
TH		 3453
3454/**
3455 * ata_scsi_user_scan - indication for user-initiated bus scan
3456 * @shost: SCSI host to scan
3457 * @channel: Channel to scan
3458 * @id: ID to scan
3459 * @lun: LUN to scan
3460 *
3461 * This function is called when user explicitly requests bus
3462 * scan. Set probe pending flag and invoke EH.
3463 *
3464 * LOCKING:
3465 * SCSI layer (we don't care)
3466 *
3467 * RETURNS:
3468 * Zero.
3469 */
3470static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3471 unsigned int id, unsigned int lun)
3472{
3473 struct ata_port *ap = ata_shost_to_port(shost);
3474 unsigned long flags;
41bda9c9 3475 int devno, rc = 0;
83c47bcb
TH		 3476
3477 if (!ap->ops->error_handler)
3478 return -EOPNOTSUPP;
3479
41bda9c9 3480 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3481 return -EINVAL;
3482
071f44b1 3483 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3484 if (channel != SCAN_WILD_CARD && channel)
3485 return -EINVAL;
3486 devno = id;
3487 } else {
3488 if (id != SCAN_WILD_CARD && id)
3489 return -EINVAL;
3490 devno = channel;
3491 }
3492
ba6a1308 3493 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3494
41bda9c9
TH		 3495 if (devno == SCAN_WILD_CARD) {
3496 struct ata_link *link;
3497
3498 ata_port_for_each_link(link, ap) {
3499 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3500 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3501 ehi->action |= ATA_EH_RESET;
41bda9c9 3502 }
83c47bcb 3503 } else {
41bda9c9 3504 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3505
3506 if (dev) {
41bda9c9 3507 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3508 ehi->probe_mask |= 1 << dev->devno;
cf480626 3509 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3510 } else
3511 rc = -EINVAL;
3512 }
3513
309afcb5 3514 if (rc == 0) {
83c47bcb 3515 ata_port_schedule_eh(ap);
309afcb5
TH		 3516 spin_unlock_irqrestore(ap->lock, flags);
3517 ata_port_wait_eh(ap);
3518 } else
3519 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3520
3521 return rc;
3522}
3057ac3c 3523
3524/**
d0171269 3525 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3526 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3527 *
d0171269
TH		 3528 * After ATA pass thru (SAT) commands are executed successfully,
3529 * libata need to propagate the changes to SCSI layer. This
3530 * function must be executed from ata_aux_wq such that sdev
3531 * attach/detach don't race with rescan.
3057ac3c 3532 *
d0171269
TH		 3533 * LOCKING:
3534 * Kernel thread context (may sleep).
3057ac3c 3535 */
65f27f38 3536void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3537{
65f27f38
DH		 3538 struct ata_port *ap =
3539 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3540 struct ata_link *link;
f58229f8 3541 struct ata_device *dev;
f84e7e41 3542 unsigned long flags;
3057ac3c 3543
f84e7e41
TH		 3544 spin_lock_irqsave(ap->lock, flags);
3545
41bda9c9
TH		 3546 ata_port_for_each_link(link, ap) {
3547 ata_link_for_each_dev(dev, link) {
3548 struct scsi_device *sdev = dev->sdev;
3057ac3c 3549
41bda9c9
TH		 3550 if (!ata_dev_enabled(dev) || !sdev)
3551 continue;
3552 if (scsi_device_get(sdev))
3553 continue;
f84e7e41 3554
41bda9c9
TH		 3555 spin_unlock_irqrestore(ap->lock, flags);
3556 scsi_rescan_device(&(sdev->sdev_gendev));
3557 scsi_device_put(sdev);
3558 spin_lock_irqsave(ap->lock, flags);
3559 }
3057ac3c 3560 }
f84e7e41
TH		 3561
3562 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3563}
80289167
BK		 3564
3565/**
3566 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3567 * @host: ATA host container for all SAS ports
80289167 3568 * @port_info: Information from low-level host driver
cca3974e 3569 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3570 *
3571 * LOCKING:
3572 * PCI/etc. bus probe sem.
3573 *
3574 * RETURNS:
3575 * ata_port pointer on success / NULL on failure.
3576 */
3577
cca3974e 3578struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3579 struct ata_port_info *port_info,
cca3974e 3580 struct Scsi_Host *shost)
80289167 3581{
f3187195 3582 struct ata_port *ap;
80289167 3583
f3187195 3584 ap = ata_port_alloc(host);
80289167
BK		 3585 if (!ap)
3586 return NULL;
3587
f3187195 3588 ap->port_no = 0;
cca3974e 3589 ap->lock = shost->host_lock;
f3187195
TH		 3590 ap->pio_mask = port_info->pio_mask;
3591 ap->mwdma_mask = port_info->mwdma_mask;
3592 ap->udma_mask = port_info->udma_mask;
3593 ap->flags |= port_info->flags;
3594 ap->ops = port_info->port_ops;
3595 ap->cbl = ATA_CBL_SATA;
3596
80289167
BK		 3597 return ap;
3598}
3599EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3600
3601/**
3602 * ata_sas_port_start - Set port up for dma.
3603 * @ap: Port to initialize
3604 *
3605 * Called just after data structures for each port are
dde20207 3606 * initialized.
80289167
BK		 3607 *
3608 * May be used as the port_start() entry in ata_port_operations.
3609 *
3610 * LOCKING:
3611 * Inherited from caller.
3612 */
3613int ata_sas_port_start(struct ata_port *ap)
3614{
dde20207 3615 return 0;
80289167
BK		 3616}
3617EXPORT_SYMBOL_GPL(ata_sas_port_start);
3618
3619/**
3620 * ata_port_stop - Undo ata_sas_port_start()
3621 * @ap: Port to shut down
3622 *
80289167
BK		 3623 * May be used as the port_stop() entry in ata_port_operations.
3624 *
3625 * LOCKING:
3626 * Inherited from caller.
3627 */
3628
3629void ata_sas_port_stop(struct ata_port *ap)
3630{
80289167
BK		 3631}
3632EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3633
3634/**
3635 * ata_sas_port_init - Initialize a SATA device
3636 * @ap: SATA port to initialize
3637 *
3638 * LOCKING:
3639 * PCI/etc. bus probe sem.
3640 *
3641 * RETURNS:
3642 * Zero on success, non-zero on error.
3643 */
3644
3645int ata_sas_port_init(struct ata_port *ap)
3646{
3647 int rc = ap->ops->port_start(ap);
3648
f3187195
TH		 3649 if (!rc) {
3650 ap->print_id = ata_print_id++;
80289167 3651 rc = ata_bus_probe(ap);
f3187195 3652 }
80289167
BK		 3653
3654 return rc;
3655}
3656EXPORT_SYMBOL_GPL(ata_sas_port_init);
3657
3658/**
3659 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3660 * @ap: SATA port to destroy
3661 *
3662 */
3663
3664void ata_sas_port_destroy(struct ata_port *ap)
3665{
f0d36efd
TH		 3666 if (ap->ops->port_stop)
3667 ap->ops->port_stop(ap);
80289167
BK		 3668 kfree(ap);
3669}
3670EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3671
3672/**
3673 * ata_sas_slave_configure - Default slave_config routine for libata devices
3674 * @sdev: SCSI device to configure
3675 * @ap: ATA port to which SCSI device is attached
3676 *
3677 * RETURNS:
3678 * Zero.
3679 */
3680
3681int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3682{
3683 ata_scsi_sdev_config(sdev);
9af5c9c9 3684 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3685 return 0;
3686}
3687EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3688
3689/**
3690 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3691 * @cmd: SCSI command to be sent
3692 * @done: Completion function, called when command is complete
3693 * @ap: ATA port to which the command is being sent
3694 *
3695 * RETURNS:
08475a19
BK		 3696 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3697 * 0 otherwise.
80289167
BK		 3698 */
3699
3700int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3701 struct ata_port *ap)
3702{
08475a19
BK		 3703 int rc = 0;
3704
80289167
BK		 3705 ata_scsi_dump_cdb(ap, cmd);
3706
2486fa56 3707 if (likely(ata_dev_enabled(ap->link.device)))
9af5c9c9 3708 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3709 else {
3710 cmd->result = (DID_BAD_TARGET << 16);
3711 done(cmd);
3712 }
08475a19 3713 return rc;
80289167
BK		 3714}
3715EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
kernel source for telekom puls (alcatel/mediatek)