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libata: fix suspend/resume for ATA SEMB devices
[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>
2a6e58d2 49#include <linux/suspend.h>
1da177e4
LT		 50
51#include "libata.h"
52
87340e98
TH		 53#define SECTOR_SIZE 512
54#define ATA_SCSI_RBUF_SIZE 4096
55
56static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
57static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
b095518e 58
ad706991 59typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b 60
2dcb407e 61static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 62 const struct scsi_device *scsidev);
2dcb407e 63static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
ab5b3a5b 64 const struct scsi_device *scsidev);
83c47bcb
TH		 65static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
66 unsigned int id, unsigned int lun);
ab5b3a5b 67
1da177e4 68
00ac37f5
DG		 69#define RW_RECOVERY_MPAGE 0x1
70#define RW_RECOVERY_MPAGE_LEN 12
71#define CACHE_MPAGE 0x8
72#define CACHE_MPAGE_LEN 20
73#define CONTROL_MPAGE 0xa
74#define CONTROL_MPAGE_LEN 12
75#define ALL_MPAGES 0x3f
76#define ALL_SUB_MPAGES 0xff
77
78
24f75686 79static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 80 RW_RECOVERY_MPAGE,
81 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 82 (1 << 7), /* AWRE */
00ac37f5
DG		 83 0, /* read retry count */
84 0, 0, 0, 0,
85 0, /* write retry count */
86 0, 0, 0
87};
88
89static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
90 CACHE_MPAGE,
91 CACHE_MPAGE_LEN - 2,
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0
96};
97
98static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE,
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
105};
106
30afc84c
TH		 107/*
108 * libata transport template. libata doesn't do real transport stuff.
109 * It just needs the eh_timed_out hook.
110 */
f3187195 111static struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 112 .eh_strategy_handler = ata_scsi_error,
30afc84c 113 .eh_timed_out = ata_scsi_timed_out,
ccf68c34 114 .user_scan = ata_scsi_user_scan,
30afc84c
TH		 115};
116
1da177e4 117
ca77329f
KCA		 118static const struct {
119 enum link_pm value;
120 const char *name;
121} link_pm_policy[] = {
122 { NOT_AVAILABLE, "max_performance" },
123 { MIN_POWER, "min_power" },
124 { MAX_PERFORMANCE, "max_performance" },
125 { MEDIUM_POWER, "medium_power" },
126};
127
a2d6ed14 128static const char *ata_scsi_lpm_get(enum link_pm policy)
ca77329f
KCA		 129{
130 int i;
131
132 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
133 if (link_pm_policy[i].value == policy)
134 return link_pm_policy[i].name;
135
136 return NULL;
137}
138
ee959b00
TJ		 139static ssize_t ata_scsi_lpm_put(struct device *dev,
140 struct device_attribute *attr,
141 const char *buf, size_t count)
ca77329f 142{
ee959b00 143 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f
KCA		 144 struct ata_port *ap = ata_shost_to_port(shost);
145 enum link_pm policy = 0;
146 int i;
147
148 /*
149 * we are skipping array location 0 on purpose - this
150 * is because a value of NOT_AVAILABLE is displayed
151 * to the user as max_performance, but when the user
152 * writes "max_performance", they actually want the
153 * value to match MAX_PERFORMANCE.
154 */
155 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
156 const int len = strlen(link_pm_policy[i].name);
157 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
158 buf[len] == '\n') {
159 policy = link_pm_policy[i].value;
160 break;
161 }
162 }
163 if (!policy)
164 return -EINVAL;
165
166 ata_lpm_schedule(ap, policy);
167 return count;
168}
169
170static ssize_t
ee959b00 171ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
ca77329f 172{
ee959b00 173 struct Scsi_Host *shost = class_to_shost(dev);
ca77329f
KCA		 174 struct ata_port *ap = ata_shost_to_port(shost);
175 const char *policy =
176 ata_scsi_lpm_get(ap->pm_policy);
177
178 if (!policy)
179 return -EINVAL;
180
181 return snprintf(buf, 23, "%s\n", policy);
182}
ee959b00 183DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
ca77329f 184 ata_scsi_lpm_show, ata_scsi_lpm_put);
ee959b00 185EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
ca77329f 186
45fabbb7
EO		 187static ssize_t ata_scsi_park_show(struct device *device,
188 struct device_attribute *attr, char *buf)
189{
190 struct scsi_device *sdev = to_scsi_device(device);
191 struct ata_port *ap;
192 struct ata_link *link;
193 struct ata_device *dev;
a464189d 194 unsigned long flags, now;
45fabbb7
EO		 195 unsigned int uninitialized_var(msecs);
196 int rc = 0;
197
198 ap = ata_shost_to_port(sdev->host);
199
200 spin_lock_irqsave(ap->lock, flags);
201 dev = ata_scsi_find_dev(ap, sdev);
202 if (!dev) {
203 rc = -ENODEV;
204 goto unlock;
205 }
206 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
207 rc = -EOPNOTSUPP;
208 goto unlock;
209 }
210
211 link = dev->link;
a464189d 212 now = jiffies;
45fabbb7
EO		 213 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
214 link->eh_context.unloaded_mask & (1 << dev->devno) &&
a464189d
EO		 215 time_after(dev->unpark_deadline, now))
216 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
45fabbb7
EO		 217 else
218 msecs = 0;
219
220unlock:
221 spin_unlock_irq(ap->lock);
222
223 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
224}
225
226static ssize_t ata_scsi_park_store(struct device *device,
227 struct device_attribute *attr,
228 const char *buf, size_t len)
229{
230 struct scsi_device *sdev = to_scsi_device(device);
231 struct ata_port *ap;
232 struct ata_device *dev;
233 long int input;
234 unsigned long flags;
235 int rc;
236
237 rc = strict_strtol(buf, 10, &input);
238 if (rc || input < -2)
239 return -EINVAL;
240 if (input > ATA_TMOUT_MAX_PARK) {
241 rc = -EOVERFLOW;
242 input = ATA_TMOUT_MAX_PARK;
243 }
244
245 ap = ata_shost_to_port(sdev->host);
246
247 spin_lock_irqsave(ap->lock, flags);
248 dev = ata_scsi_find_dev(ap, sdev);
249 if (unlikely(!dev)) {
250 rc = -ENODEV;
251 goto unlock;
252 }
253 if (dev->class != ATA_DEV_ATA) {
254 rc = -EOPNOTSUPP;
255 goto unlock;
256 }
257
258 if (input >= 0) {
259 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
260 rc = -EOPNOTSUPP;
261 goto unlock;
262 }
263
264 dev->unpark_deadline = ata_deadline(jiffies, input);
265 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
266 ata_port_schedule_eh(ap);
267 complete(&ap->park_req_pending);
268 } else {
269 switch (input) {
270 case -1:
271 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
272 break;
273 case -2:
274 dev->flags |= ATA_DFLAG_NO_UNLOAD;
275 break;
276 }
277 }
278unlock:
279 spin_unlock_irqrestore(ap->lock, flags);
280
281 return rc ? rc : len;
282}
283DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
284 ata_scsi_park_show, ata_scsi_park_store);
285EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
286
f0761be3
TH		 287static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
288{
289 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
290
291 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
292}
293
18f7ba4c
KCA		 294static ssize_t
295ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
296 const char *buf, size_t count)
297{
298 struct Scsi_Host *shost = class_to_shost(dev);
299 struct ata_port *ap = ata_shost_to_port(shost);
300 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
301 return ap->ops->em_store(ap, buf, count);
302 return -EINVAL;
303}
304
305static ssize_t
306ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
307 char *buf)
308{
309 struct Scsi_Host *shost = class_to_shost(dev);
310 struct ata_port *ap = ata_shost_to_port(shost);
311
312 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
313 return ap->ops->em_show(ap, buf);
314 return -EINVAL;
315}
316DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
317 ata_scsi_em_message_show, ata_scsi_em_message_store);
318EXPORT_SYMBOL_GPL(dev_attr_em_message);
319
320static ssize_t
321ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
322 char *buf)
323{
324 struct Scsi_Host *shost = class_to_shost(dev);
325 struct ata_port *ap = ata_shost_to_port(shost);
326
327 return snprintf(buf, 23, "%d\n", ap->em_message_type);
328}
329DEVICE_ATTR(em_message_type, S_IRUGO,
330 ata_scsi_em_message_type_show, NULL);
331EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
332
333static ssize_t
334ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
335 char *buf)
336{
337 struct scsi_device *sdev = to_scsi_device(dev);
338 struct ata_port *ap = ata_shost_to_port(sdev->host);
339 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340
341 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
342 return ap->ops->sw_activity_show(atadev, buf);
343 return -EINVAL;
344}
345
346static ssize_t
347ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
348 const char *buf, size_t count)
349{
350 struct scsi_device *sdev = to_scsi_device(dev);
351 struct ata_port *ap = ata_shost_to_port(sdev->host);
352 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
353 enum sw_activity val;
354 int rc;
355
356 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
357 val = simple_strtoul(buf, NULL, 0);
358 switch (val) {
359 case OFF: case BLINK_ON: case BLINK_OFF:
360 rc = ap->ops->sw_activity_store(atadev, val);
361 if (!rc)
362 return count;
363 else
364 return rc;
365 }
366 }
367 return -EINVAL;
368}
369DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
370 ata_scsi_activity_store);
371EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
372
45fabbb7
EO		 373struct device_attribute *ata_common_sdev_attrs[] = {
374 &dev_attr_unload_heads,
375 NULL
376};
377EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
378
ae006510
DG		 379static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
380 void (*done)(struct scsi_cmnd *))
381{
382 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
383 /* "Invalid field in cbd" */
384 done(cmd);
385}
386
1da177e4
LT		 387/**
388 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
389 * @sdev: SCSI device for which BIOS geometry is to be determined
390 * @bdev: block device associated with @sdev
391 * @capacity: capacity of SCSI device
392 * @geom: location to which geometry will be output
393 *
394 * Generic bios head/sector/cylinder calculator
395 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
396 * mapping. Some situations may arise where the disk is not
397 * bootable if this is not used.
398 *
399 * LOCKING:
400 * Defined by the SCSI layer. We don't really care.
401 *
402 * RETURNS:
403 * Zero.
404 */
405int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
406 sector_t capacity, int geom[])
407{
408 geom[0] = 255;
409 geom[1] = 63;
410 sector_div(capacity, 255*63);
411 geom[2] = capacity;
412
413 return 0;
414}
415
5924b74c
TH		 416/**
417 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
5eb66fe0 418 * @ap: target port
5924b74c
TH		 419 * @sdev: SCSI device to get identify data for
420 * @arg: User buffer area for identify data
421 *
422 * LOCKING:
423 * Defined by the SCSI layer. We don't really care.
424 *
425 * RETURNS:
426 * Zero on success, negative errno on error.
427 */
94be9a58
JG		 428static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
429 void __user *arg)
5924b74c 430{
5924b74c
TH		 431 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
432 u16 __user *dst = arg;
433 char buf[40];
434
435 if (!dev)
436 return -ENOMSG;
437
438 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
439 return -EFAULT;
440
441 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
442 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
443 return -EFAULT;
444
445 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
446 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
447 return -EFAULT;
448
449 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
450 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
451 return -EFAULT;
452
453 return 0;
454}
455
b095518e
JG		 456/**
457 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 458 * @scsidev: Device to which we are issuing command
b095518e
JG		 459 * @arg: User provided data for issuing command
460 *
461 * LOCKING:
462 * Defined by the SCSI layer. We don't really care.
463 *
464 * RETURNS:
465 * Zero on success, negative errno on error.
466 */
b095518e
JG		 467int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
468{
469 int rc = 0;
470 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 471 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 472 int argsize = 0;
85837ebd 473 enum dma_data_direction data_dir;
bbe1fe7e 474 int cmd_result;
b095518e 475
c893a3ae 476 if (arg == NULL)
b095518e
JG		 477 return -EINVAL;
478
479 if (copy_from_user(args, arg, sizeof(args)))
480 return -EFAULT;
481
bbe1fe7e
ET		 482 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
483 if (!sensebuf)
484 return -ENOMEM;
485
b095518e
JG		 486 memset(scsi_cmd, 0, sizeof(scsi_cmd));
487
488 if (args[3]) {
489 argsize = SECTOR_SIZE * args[3];
490 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 491 if (argbuf == NULL) {
492 rc = -ENOMEM;
493 goto error;
494 }
b095518e
JG		 495
496 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
497 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
2dcb407e 498 block count in sector count field */
85837ebd 499 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 500 } else {
501 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 502 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 503 data_dir = DMA_NONE;
b095518e
JG		 504 }
505
506 scsi_cmd[0] = ATA_16;
507
508 scsi_cmd[4] = args[2];
a4f19040 509 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
b095518e
JG		 510 scsi_cmd[6] = args[3];
511 scsi_cmd[8] = args[1];
512 scsi_cmd[10] = 0x4f;
513 scsi_cmd[12] = 0xc2;
514 } else {
515 scsi_cmd[6] = args[1];
516 }
517 scsi_cmd[14] = args[0];
518
519 /* Good values for timeout and retries? Values below
520 from scsi_ioctl_send_command() for default case... */
bbe1fe7e 521 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
f4f4e47e 522 sensebuf, (10*HZ), 5, 0, NULL);
bbe1fe7e
ET		 523
524 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
525 u8 *desc = sensebuf + 8;
526 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
527
528 /* If we set cc then ATA pass-through will cause a
529 * check condition even if no error. Filter that. */
530 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
531 struct scsi_sense_hdr sshdr;
532 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
2dcb407e
JG		 533 &sshdr);
534 if (sshdr.sense_key == 0 &&
535 sshdr.asc == 0 && sshdr.ascq == 0)
bbe1fe7e
ET		 536 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
537 }
538
539 /* Send userspace a few ATA registers (same as drivers/ide) */
2dcb407e
JG		 540 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
541 desc[0] == 0x09) { /* code is "ATA Descriptor" */
542 args[0] = desc[13]; /* status */
543 args[1] = desc[3]; /* error */
544 args[2] = desc[5]; /* sector count (0:7) */
bbe1fe7e
ET		 545 if (copy_to_user(arg, args, sizeof(args)))
546 rc = -EFAULT;
547 }
548 }
549
550
551 if (cmd_result) {
b095518e
JG		 552 rc = -EIO;
553 goto error;
554 }
555
b095518e 556 if ((argbuf)
c893a3ae 557 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 558 rc = -EFAULT;
559error:
bbe1fe7e 560 kfree(sensebuf);
8f760780 561 kfree(argbuf);
b095518e
JG		 562 return rc;
563}
564
565/**
566 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 567 * @scsidev: Device to which we are issuing command
b095518e
JG		 568 * @arg: User provided data for issuing command
569 *
570 * LOCKING:
571 * Defined by the SCSI layer. We don't really care.
572 *
573 * RETURNS:
574 * Zero on success, negative errno on error.
575 */
576int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
577{
578 int rc = 0;
579 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 580 u8 args[7], *sensebuf = NULL;
581 int cmd_result;
b095518e 582
c893a3ae 583 if (arg == NULL)
b095518e
JG		 584 return -EINVAL;
585
586 if (copy_from_user(args, arg, sizeof(args)))
587 return -EFAULT;
588
af068bd1
DM		 589 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
590 if (!sensebuf)
591 return -ENOMEM;
592
b095518e
JG		 593 memset(scsi_cmd, 0, sizeof(scsi_cmd));
594 scsi_cmd[0] = ATA_16;
595 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 596 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 597 scsi_cmd[4] = args[1];
598 scsi_cmd[6] = args[2];
599 scsi_cmd[8] = args[3];
600 scsi_cmd[10] = args[4];
601 scsi_cmd[12] = args[5];
277239f2 602 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 603 scsi_cmd[14] = args[0];
604
b095518e 605 /* Good values for timeout and retries? Values below
2e9edbf8 606 from scsi_ioctl_send_command() for default case... */
af068bd1 607 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
f4f4e47e 608 sensebuf, (10*HZ), 5, 0, NULL);
af068bd1
DM		 609
610 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
611 u8 *desc = sensebuf + 8;
612 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
613
614 /* If we set cc then ATA pass-through will cause a
615 * check condition even if no error. Filter that. */
616 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
617 struct scsi_sense_hdr sshdr;
618 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
619 &sshdr);
2dcb407e
JG		 620 if (sshdr.sense_key == 0 &&
621 sshdr.asc == 0 && sshdr.ascq == 0)
af068bd1
DM		 622 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
623 }
624
625 /* Send userspace ATA registers */
626 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
627 desc[0] == 0x09) {/* code is "ATA Descriptor" */
628 args[0] = desc[13]; /* status */
629 args[1] = desc[3]; /* error */
630 args[2] = desc[5]; /* sector count (0:7) */
631 args[3] = desc[7]; /* lbal */
632 args[4] = desc[9]; /* lbam */
633 args[5] = desc[11]; /* lbah */
634 args[6] = desc[12]; /* select */
635 if (copy_to_user(arg, args, sizeof(args)))
636 rc = -EFAULT;
637 }
638 }
639
640 if (cmd_result) {
b095518e 641 rc = -EIO;
af068bd1
DM		 642 goto error;
643 }
b095518e 644
af068bd1
DM		 645 error:
646 kfree(sensebuf);
b095518e
JG		 647 return rc;
648}
649
e3cf95dd
AC		 650static int ata_ioc32(struct ata_port *ap)
651{
652 if (ap->flags & ATA_FLAG_PIO_DMA)
653 return 1;
654 if (ap->pflags & ATA_PFLAG_PIO32)
655 return 1;
656 return 0;
657}
658
94be9a58
JG		 659int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
660 int cmd, void __user *arg)
1da177e4 661{
1da177e4 662 int val = -EINVAL, rc = -EINVAL;
e3cf95dd 663 unsigned long flags;
1da177e4 664
1da177e4
LT		 665 switch (cmd) {
666 case ATA_IOC_GET_IO32:
e3cf95dd
AC		 667 spin_lock_irqsave(ap->lock, flags);
668 val = ata_ioc32(ap);
669 spin_unlock_irqrestore(ap->lock, flags);
1da177e4
LT		 670 if (copy_to_user(arg, &val, 1))
671 return -EFAULT;
672 return 0;
673
674 case ATA_IOC_SET_IO32:
675 val = (unsigned long) arg;
e3cf95dd
AC		 676 rc = 0;
677 spin_lock_irqsave(ap->lock, flags);
678 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
679 if (val)
680 ap->pflags |= ATA_PFLAG_PIO32;
681 else
682 ap->pflags &= ~ATA_PFLAG_PIO32;
683 } else {
684 if (val != ata_ioc32(ap))
685 rc = -EINVAL;
686 }
687 spin_unlock_irqrestore(ap->lock, flags);
688 return rc;
1da177e4 689
5924b74c 690 case HDIO_GET_IDENTITY:
94be9a58 691 return ata_get_identity(ap, scsidev, arg);
5924b74c 692
b095518e
JG		 693 case HDIO_DRIVE_CMD:
694 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
695 return -EACCES;
696 return ata_cmd_ioctl(scsidev, arg);
697
698 case HDIO_DRIVE_TASK:
699 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
700 return -EACCES;
701 return ata_task_ioctl(scsidev, arg);
702
1da177e4
LT		 703 default:
704 rc = -ENOTTY;
705 break;
706 }
707
1da177e4
LT		 708 return rc;
709}
94be9a58
JG		 710EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
711
712int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
713{
714 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
715 scsidev, cmd, arg);
716}
717EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
1da177e4
LT		 718
719/**
720 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 721 * @dev: ATA device to which the new command is attached
722 * @cmd: SCSI command that originated this ATA command
723 * @done: SCSI command completion function
724 *
725 * Obtain a reference to an unused ata_queued_cmd structure,
726 * which is the basic libata structure representing a single
727 * ATA command sent to the hardware.
728 *
729 * If a command was available, fill in the SCSI-specific
730 * portions of the structure with information on the
731 * current command.
732 *
733 * LOCKING:
cca3974e 734 * spin_lock_irqsave(host lock)
1da177e4
LT		 735 *
736 * RETURNS:
737 * Command allocated, or %NULL if none available.
738 */
7102d230
AB		 739static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
740 struct scsi_cmnd *cmd,
741 void (*done)(struct scsi_cmnd *))
1da177e4
LT		 742{
743 struct ata_queued_cmd *qc;
744
8a8bc223 745 qc = ata_qc_new_init(dev);
1da177e4
LT		 746 if (qc) {
747 qc->scsicmd = cmd;
748 qc->scsidone = done;
749
ff2aeb1e 750 qc->sg = scsi_sglist(cmd);
7120165c 751 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 752 } else {
753 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
754 done(cmd);
755 }
756
757 return qc;
758}
759
aacda375
TH		 760static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
761{
762 struct scsi_cmnd *scmd = qc->scsicmd;
763
764 qc->extrabytes = scmd->request->extra_len;
765 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
766}
767
b095518e
JG		 768/**
769 * ata_dump_status - user friendly display of error info
770 * @id: id of the port in question
771 * @tf: ptr to filled out taskfile
772 *
773 * Decode and dump the ATA error/status registers for the user so
774 * that they have some idea what really happened at the non
775 * make-believe layer.
776 *
777 * LOCKING:
778 * inherited from caller
779 */
7102d230 780static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 781{
782 u8 stat = tf->command, err = tf->feature;
783
784 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
785 if (stat & ATA_BUSY) {
786 printk("Busy }\n"); /* Data is not valid in this case */
787 } else {
788 if (stat & 0x40) printk("DriveReady ");
789 if (stat & 0x20) printk("DeviceFault ");
790 if (stat & 0x10) printk("SeekComplete ");
791 if (stat & 0x08) printk("DataRequest ");
792 if (stat & 0x04) printk("CorrectedError ");
793 if (stat & 0x02) printk("Index ");
794 if (stat & 0x01) printk("Error ");
795 printk("}\n");
796
797 if (err) {
798 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
799 if (err & 0x04) printk("DriveStatusError ");
800 if (err & 0x80) {
801 if (err & 0x04) printk("BadCRC ");
802 else printk("Sector ");
803 }
804 if (err & 0x40) printk("UncorrectableError ");
805 if (err & 0x10) printk("SectorIdNotFound ");
806 if (err & 0x02) printk("TrackZeroNotFound ");
807 if (err & 0x01) printk("AddrMarkNotFound ");
808 printk("}\n");
809 }
810 }
811}
812
1da177e4
LT		 813/**
814 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 815 * @id: ATA device number
1da177e4 816 * @drv_stat: value contained in ATA status register
b095518e
JG		 817 * @drv_err: value contained in ATA error register
818 * @sk: the sense key we'll fill out
819 * @asc: the additional sense code we'll fill out
820 * @ascq: the additional sense code qualifier we'll fill out
246619da 821 * @verbose: be verbose
1da177e4 822 *
b095518e
JG		 823 * Converts an ATA error into a SCSI error. Fill out pointers to
824 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
825 * format sense blocks.
1da177e4
LT		 826 *
827 * LOCKING:
cca3974e 828 * spin_lock_irqsave(host lock)
1da177e4 829 */
7102d230
AB		 830static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
831 u8 *asc, u8 *ascq, int verbose)
1da177e4 832{
b095518e 833 int i;
ffe75ef6 834
1da177e4 835 /* Based on the 3ware driver translation table */
98ac62de 836 static const unsigned char sense_table[][4] = {
1da177e4
LT		 837 /* BBD|ECC|ID|MAR */
838 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
839 /* BBD|ECC|ID */
840 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
841 /* ECC|MC|MARK */
842 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
843 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
844 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
845 /* MC|ID|ABRT|TRK0|MARK */
846 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
847 /* MCR|MARK */
848 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
849 /* Bad address mark */
850 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
851 /* TRK0 */
852 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
853 /* Abort & !ICRC */
854 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
855 /* Media change request */
856 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
857 /* SRV */
858 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
859 /* Media change */
860 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
861 /* ECC */
862 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
863 /* BBD - block marked bad */
864 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
865 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
866 };
98ac62de 867 static const unsigned char stat_table[][4] = {
1da177e4
LT		 868 /* Must be first because BUSY means no other bits valid */
869 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
870 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
871 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
872 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
873 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
874 };
1da177e4 875
1da177e4
LT		 876 /*
877 * Is this an error we can process/parse
878 */
b095518e
JG		 879 if (drv_stat & ATA_BUSY) {
880 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 881 }
b095518e
JG		 882
883 if (drv_err) {
884 /* Look for drv_err */
885 for (i = 0; sense_table[i][0] != 0xFF; i++) {
886 /* Look for best matches first */
2e9edbf8 887 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 888 sense_table[i][0]) {
889 *sk = sense_table[i][1];
890 *asc = sense_table[i][2];
891 *ascq = sense_table[i][3];
892 goto translate_done;
893 }
894 }
895 /* No immediate match */
246619da
TH		 896 if (verbose)
897 printk(KERN_WARNING "ata%u: no sense translation for "
898 "error 0x%02x\n", id, drv_err);
1da177e4 899 }
b095518e
JG		 900
901 /* Fall back to interpreting status bits */
902 for (i = 0; stat_table[i][0] != 0xFF; i++) {
903 if (stat_table[i][0] & drv_stat) {
904 *sk = stat_table[i][1];
905 *asc = stat_table[i][2];
906 *ascq = stat_table[i][3];
907 goto translate_done;
1da177e4 908 }
b095518e
JG		 909 }
910 /* No error? Undecoded? */
246619da
TH		 911 if (verbose)
912 printk(KERN_WARNING "ata%u: no sense translation for "
913 "status: 0x%02x\n", id, drv_stat);
b095518e 914
2d202024
AC		 915 /* We need a sensible error return here, which is tricky, and one
916 that won't cause people to do things like return a disk wrongly */
917 *sk = ABORTED_COMMAND;
918 *asc = 0x00;
919 *ascq = 0x00;
b095518e
JG		 920
921 translate_done:
246619da
TH		 922 if (verbose)
923 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
924 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
925 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 926 return;
927}
928
929/*
750426aa 930 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 931 * @qc: Command that completed.
932 *
933 * This function is specific to the ATA descriptor format sense
934 * block specified for the ATA pass through commands. Regardless
935 * of whether the command errored or not, return a sense
936 * block. Copy all controller registers into the sense
937 * block. Clear sense key, ASC & ASCQ if there is no error.
938 *
939 * LOCKING:
750426aa 940 * None.
b095518e 941 */
750426aa 942static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 943{
944 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 945 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 946 unsigned char *sb = cmd->sense_buffer;
947 unsigned char *desc = sb + 8;
246619da 948 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 949
950 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
951
0e5dec47 952 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 953
b095518e
JG		 954 /*
955 * Use ata_to_sense_error() to map status register bits
956 * onto sense key, asc & ascq.
957 */
058e55e1
TH		 958 if (qc->err_mask ||
959 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 960 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 961 &sb[1], &sb[2], &sb[3], verbose);
b095518e 962 sb[1] &= 0x0f;
1da177e4
LT		 963 }
964
b095518e
JG		 965 /*
966 * Sense data is current and format is descriptor.
967 */
968 sb[0] = 0x72;
1da177e4 969
b095518e
JG		 970 desc[0] = 0x09;
971
f38621b3
TH		 972 /* set length of additional sense data */
973 sb[7] = 14;
974 desc[1] = 12;
b095518e
JG		 975
976 /*
977 * Copy registers into sense buffer.
978 */
979 desc[2] = 0x00;
980 desc[3] = tf->feature; /* == error reg */
981 desc[5] = tf->nsect;
982 desc[7] = tf->lbal;
983 desc[9] = tf->lbam;
984 desc[11] = tf->lbah;
985 desc[12] = tf->device;
986 desc[13] = tf->command; /* == status reg */
987
988 /*
989 * Fill in Extend bit, and the high order bytes
990 * if applicable.
991 */
992 if (tf->flags & ATA_TFLAG_LBA48) {
993 desc[2] |= 0x01;
994 desc[4] = tf->hob_nsect;
995 desc[6] = tf->hob_lbal;
996 desc[8] = tf->hob_lbam;
997 desc[10] = tf->hob_lbah;
1da177e4 998 }
b095518e 999}
1da177e4 1000
b095518e 1001/**
750426aa 1002 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 1003 * @qc: Command that we are erroring out
1004 *
d25614ba
TH		 1005 * Generate sense block for a failed ATA command @qc. Descriptor
1006 * format is used to accomodate LBA48 block address.
b095518e
JG		 1007 *
1008 * LOCKING:
750426aa 1009 * None.
b095518e 1010 */
750426aa 1011static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 1012{
d25614ba 1013 struct ata_device *dev = qc->dev;
b095518e 1014 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 1015 struct ata_taskfile *tf = &qc->result_tf;
b095518e 1016 unsigned char *sb = cmd->sense_buffer;
d25614ba 1017 unsigned char *desc = sb + 8;
246619da 1018 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 1019 u64 block;
b095518e
JG		 1020
1021 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1022
0e5dec47 1023 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 1024
d25614ba
TH		 1025 /* sense data is current and format is descriptor */
1026 sb[0] = 0x72;
1027
1028 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 1029 * onto sense key, asc & ascq.
1030 */
058e55e1
TH		 1031 if (qc->err_mask ||
1032 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 1033 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 1034 &sb[1], &sb[2], &sb[3], verbose);
1035 sb[1] &= 0x0f;
1da177e4 1036 }
1da177e4 1037
d25614ba 1038 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 1039
d25614ba
TH		 1040 /* information sense data descriptor */
1041 sb[7] = 12;
1042 desc[0] = 0x00;
1043 desc[1] = 10;
a7dac447 1044
d25614ba
TH		 1045 desc[2] |= 0x80; /* valid */
1046 desc[6] = block >> 40;
1047 desc[7] = block >> 32;
1048 desc[8] = block >> 24;
1049 desc[9] = block >> 16;
1050 desc[10] = block >> 8;
1051 desc[11] = block;
1da177e4
LT		 1052}
1053
a6cce2a7
BK		 1054static void ata_scsi_sdev_config(struct scsi_device *sdev)
1055{
1056 sdev->use_10_for_rw = 1;
1057 sdev->use_10_for_ms = 1;
31cc23b3
TH		 1058
1059 /* Schedule policy is determined by ->qc_defer() callback and
1060 * it needs to see every deferred qc. Set dev_blocked to 1 to
1061 * prevent SCSI midlayer from automatically deferring
1062 * requests.
1063 */
1064 sdev->max_device_blocked = 1;
a6cce2a7
BK		 1065}
1066
fa2fc7f4
JB		 1067/**
1068 * atapi_drain_needed - Check whether data transfer may overflow
73fd8b6d 1069 * @rq: request to be checked
fa2fc7f4
JB		 1070 *
1071 * ATAPI commands which transfer variable length data to host
1072 * might overflow due to application error or hardare bug. This
1073 * function checks whether overflow should be drained and ignored
1074 * for @request.
1075 *
1076 * LOCKING:
1077 * None.
1078 *
1079 * RETURNS:
1080 * 1 if ; otherwise, 0.
1081 */
1082static int atapi_drain_needed(struct request *rq)
1083{
1084 if (likely(!blk_pc_request(rq)))
1085 return 0;
1086
1087 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
1088 return 0;
1089
1090 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1091}
1092
1093static int ata_scsi_dev_config(struct scsi_device *sdev,
1094 struct ata_device *dev)
a6cce2a7 1095{
45fabbb7
EO		 1096 if (!ata_id_has_unload(dev->id))
1097 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1098
914ed354
TH		 1099 /* configure max sectors */
1100 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 1101
fa2fc7f4
JB		 1102 if (dev->class == ATA_DEV_ATAPI) {
1103 struct request_queue *q = sdev->request_queue;
1104 void *buf;
1105
e3790c7d 1106 /* set the min alignment and padding */
d0ad3bc9
JB		 1107 blk_queue_update_dma_alignment(sdev->request_queue,
1108 ATA_DMA_PAD_SZ - 1);
27f8221a
FT		 1109 blk_queue_update_dma_pad(sdev->request_queue,
1110 ATA_DMA_PAD_SZ - 1);
fa2fc7f4
JB		 1111
1112 /* configure draining */
1113 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1114 if (!buf) {
1115 ata_dev_printk(dev, KERN_ERR,
1116 "drain buffer allocation failed\n");
1117 return -ENOMEM;
1118 }
1119
1120 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1121 } else {
8bff7c6b
JA		 1122 if (ata_id_is_ssd(dev->id))
1123 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1124 sdev->request_queue);
1125
d0ad3bc9
JB		 1126 /* ATA devices must be sector aligned */
1127 blk_queue_update_dma_alignment(sdev->request_queue,
1128 ATA_SECT_SIZE - 1);
d8cf5389 1129 sdev->manage_start_stop = 1;
dde20207 1130 }
d8cf5389 1131
f26792d5
JG		 1132 if (dev->flags & ATA_DFLAG_AN)
1133 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1134
a6e6ce8e
TH		 1135 if (dev->flags & ATA_DFLAG_NCQ) {
1136 int depth;
1137
1138 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1139 depth = min(ATA_MAX_QUEUE - 1, depth);
8a8bc223 1140 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
a6e6ce8e 1141 }
fa2fc7f4
JB		 1142
1143 return 0;
a6cce2a7
BK		 1144}
1145
1da177e4
LT		 1146/**
1147 * ata_scsi_slave_config - Set SCSI device attributes
1148 * @sdev: SCSI device to examine
1149 *
1150 * This is called before we actually start reading
1151 * and writing to the device, to configure certain
1152 * SCSI mid-layer behaviors.
1153 *
1154 * LOCKING:
1155 * Defined by SCSI layer. We don't really care.
1156 */
1157
1158int ata_scsi_slave_config(struct scsi_device *sdev)
1159{
31534363
TH		 1160 struct ata_port *ap = ata_shost_to_port(sdev->host);
1161 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
fa2fc7f4 1162 int rc = 0;
31534363 1163
a6cce2a7 1164 ata_scsi_sdev_config(sdev);
1da177e4 1165
31534363 1166 if (dev)
fa2fc7f4 1167 rc = ata_scsi_dev_config(sdev, dev);
1da177e4 1168
fa2fc7f4 1169 return rc;
1da177e4
LT		 1170}
1171
83c47bcb
TH		 1172/**
1173 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1174 * @sdev: SCSI device to be destroyed
1175 *
1176 * @sdev is about to be destroyed for hot/warm unplugging. If
1177 * this unplugging was initiated by libata as indicated by NULL
1178 * dev->sdev, this function doesn't have to do anything.
1179 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1180 * Clear dev->sdev, schedule the device for ATA detach and invoke
1181 * EH.
1182 *
1183 * LOCKING:
1184 * Defined by SCSI layer. We don't really care.
1185 */
1186void ata_scsi_slave_destroy(struct scsi_device *sdev)
1187{
1188 struct ata_port *ap = ata_shost_to_port(sdev->host);
fa2fc7f4 1189 struct request_queue *q = sdev->request_queue;
83c47bcb
TH		 1190 unsigned long flags;
1191 struct ata_device *dev;
1192
1193 if (!ap->ops->error_handler)
1194 return;
1195
ba6a1308 1196 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 1197 dev = __ata_scsi_find_dev(ap, sdev);
1198 if (dev && dev->sdev) {
1199 /* SCSI device already in CANCEL state, no need to offline it */
1200 dev->sdev = NULL;
1201 dev->flags |= ATA_DFLAG_DETACH;
1202 ata_port_schedule_eh(ap);
1203 }
ba6a1308 1204 spin_unlock_irqrestore(ap->lock, flags);
fa2fc7f4
JB		 1205
1206 kfree(q->dma_drain_buffer);
1207 q->dma_drain_buffer = NULL;
1208 q->dma_drain_size = 0;
83c47bcb
TH		 1209}
1210
a6e6ce8e
TH		 1211/**
1212 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1213 * @sdev: SCSI device to configure queue depth for
1214 * @queue_depth: new queue depth
1215 *
1216 * This is libata standard hostt->change_queue_depth callback.
1217 * SCSI will call into this callback when user tries to set queue
1218 * depth via sysfs.
1219 *
1220 * LOCKING:
1221 * SCSI layer (we don't care)
1222 *
1223 * RETURNS:
1224 * Newly configured queue depth.
1225 */
1226int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1227{
1228 struct ata_port *ap = ata_shost_to_port(sdev->host);
1229 struct ata_device *dev;
360f654e 1230 unsigned long flags;
a6e6ce8e 1231
c3c70c44 1232 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 1233 return sdev->queue_depth;
1234
1235 dev = ata_scsi_find_dev(ap, sdev);
1236 if (!dev || !ata_dev_enabled(dev))
1237 return sdev->queue_depth;
1238
c3c70c44 1239 /* NCQ enabled? */
360f654e 1240 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 1241 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1242 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 1243 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 1244 queue_depth = 1;
1245 }
360f654e
TH		 1246 spin_unlock_irqrestore(ap->lock, flags);
1247
c3c70c44
TH		 1248 /* limit and apply queue depth */
1249 queue_depth = min(queue_depth, sdev->host->can_queue);
1250 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1251 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1252
1253 if (sdev->queue_depth == queue_depth)
1254 return -EINVAL;
1255
1256 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 1257 return queue_depth;
1258}
1259
d9aca22c 1260/* XXX: for spindown warning */
da071b42
TH		 1261static void ata_delayed_done_timerfn(unsigned long arg)
1262{
1263 struct scsi_cmnd *scmd = (void *)arg;
1264
1265 scmd->scsi_done(scmd);
1266}
1267
d9aca22c 1268/* XXX: for spindown warning */
da071b42
TH		 1269static void ata_delayed_done(struct scsi_cmnd *scmd)
1270{
1271 static struct timer_list timer;
1272
1273 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1274 mod_timer(&timer, jiffies + 5 * HZ);
1275}
1276
972dcafb
DG		 1277/**
1278 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1279 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 1280 *
1281 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1282 * (to start). Perhaps these commands should be preceded by
1283 * CHECK POWER MODE to see what power mode the device is already in.
1284 * [See SAT revision 5 at www.t10.org]
1285 *
1286 * LOCKING:
cca3974e 1287 * spin_lock_irqsave(host lock)
972dcafb
DG		 1288 *
1289 * RETURNS:
1290 * Zero on success, non-zero on error.
1291 */
ad706991 1292static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 1293{
542b1444 1294 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 1295 struct ata_taskfile *tf = &qc->tf;
ad706991 1296 const u8 *cdb = scmd->cmnd;
972dcafb 1297
2e5704f6
TH		 1298 if (scmd->cmd_len < 5)
1299 goto invalid_fld;
1300
972dcafb
DG		 1301 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1302 tf->protocol = ATA_PROT_NODATA;
542b1444 1303 if (cdb[1] & 0x1) {
972dcafb
DG		 1304 ; /* ignore IMMED bit, violates sat-r05 */
1305 }
542b1444 1306 if (cdb[4] & 0x2)
ae006510 1307 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 1308 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 1309 goto invalid_fld; /* power conditions not supported */
e31e8531 1310
542b1444 1311 if (cdb[4] & 0x1) {
972dcafb 1312 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 1313
1314 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 1315 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 1316
1317 tf->lbah = 0x0;
1318 tf->lbam = 0x0;
1319 tf->lbal = 0x0;
1320 tf->device |= ATA_LBA;
1321 } else {
1322 /* CHS */
1323 tf->lbal = 0x1; /* sect */
1324 tf->lbam = 0x0; /* cyl low */
1325 tf->lbah = 0x0; /* cyl high */
1326 }
1327
972dcafb 1328 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10 1329 } else {
2a6e58d2
RW		 1330 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1331 * or S5) causing some drives to spin up and down again.
1332 */
1333 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1334 system_state == SYSTEM_POWER_OFF)
1335 goto skip;
1336
1337 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1338 system_entering_hibernation())
1339 goto skip;
1340
920a4b10
TH		 1341 /* XXX: This is for backward compatibility, will be
1342 * removed. Read Documentation/feature-removal-schedule.txt
1343 * for more info.
1344 */
d9aca22c 1345 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
920a4b10
TH		 1346 (system_state == SYSTEM_HALT ||
1347 system_state == SYSTEM_POWER_OFF)) {
2dcb407e 1348 static unsigned long warned;
920a4b10 1349
da071b42 1350 if (!test_and_set_bit(0, &warned)) {
920a4b10
TH		 1351 ata_dev_printk(qc->dev, KERN_WARNING,
1352 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1353 "UPDATE SHUTDOWN UTILITY\n");
1354 ata_dev_printk(qc->dev, KERN_WARNING,
1355 "For more info, visit "
1356 "http://linux-ata.org/shutdown.html\n");
da071b42
TH		 1357
1358 /* ->scsi_done is not used, use it for
1359 * delayed completion.
1360 */
1361 scmd->scsi_done = qc->scsidone;
1362 qc->scsidone = ata_delayed_done;
920a4b10 1363 }
2a6e58d2 1364 goto skip;
920a4b10
TH		 1365 }
1366
78981a7c
RH		 1367 /* Issue ATA STANDBY IMMEDIATE command */
1368 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 1369 }
78981a7c 1370
972dcafb
DG		 1371 /*
1372 * Standby and Idle condition timers could be implemented but that
1373 * would require libata to implement the Power condition mode page
1374 * and allow the user to change it. Changing mode pages requires
1375 * MODE SELECT to be implemented.
1376 */
1377
1378 return 0;
ae006510 1379
2a6e58d2 1380 invalid_fld:
542b1444 1381 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1382 /* "Invalid field in cbd" */
1383 return 1;
2a6e58d2
RW		 1384 skip:
1385 scmd->result = SAM_STAT_GOOD;
1386 return 1;
972dcafb
DG		 1387}
1388
1389
1da177e4
LT		 1390/**
1391 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1392 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1393 *
1394 * Sets up an ATA taskfile to issue FLUSH CACHE or
1395 * FLUSH CACHE EXT.
1396 *
1397 * LOCKING:
cca3974e 1398 * spin_lock_irqsave(host lock)
1da177e4
LT		 1399 *
1400 * RETURNS:
1401 * Zero on success, non-zero on error.
1402 */
ad706991 1403static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1404{
1405 struct ata_taskfile *tf = &qc->tf;
1406
1407 tf->flags |= ATA_TFLAG_DEVICE;
1408 tf->protocol = ATA_PROT_NODATA;
1409
6fc49adb 1410 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1411 tf->command = ATA_CMD_FLUSH_EXT;
1412 else
1413 tf->command = ATA_CMD_FLUSH;
1414
b666da35
TH		 1415 /* flush is critical for IO integrity, consider it an IO command */
1416 qc->flags |= ATA_QCFLAG_IO;
1417
1da177e4
LT		 1418 return 0;
1419}
1420
3aef5231
AL		 1421/**
1422 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1423 * @cdb: SCSI command to translate
3aef5231
AL		 1424 *
1425 * Calculate LBA and transfer length for 6-byte commands.
1426 *
1427 * RETURNS:
1428 * @plba: the LBA
1429 * @plen: the transfer length
1430 */
542b1444 1431static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1432{
1433 u64 lba = 0;
6c7b7d2b 1434 u32 len;
3aef5231
AL		 1435
1436 VPRINTK("six-byte command\n");
1437
6c7b7d2b 1438 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1439 lba |= ((u64)cdb[2]) << 8;
1440 lba |= ((u64)cdb[3]);
3aef5231 1441
6c7b7d2b 1442 len = cdb[4];
3aef5231
AL		 1443
1444 *plba = lba;
1445 *plen = len;
1446}
1447
1448/**
1449 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1450 * @cdb: SCSI command to translate
3aef5231
AL		 1451 *
1452 * Calculate LBA and transfer length for 10-byte commands.
1453 *
1454 * RETURNS:
1455 * @plba: the LBA
1456 * @plen: the transfer length
1457 */
542b1444 1458static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1459{
1460 u64 lba = 0;
1461 u32 len = 0;
1462
1463 VPRINTK("ten-byte command\n");
1464
542b1444
TH		 1465 lba |= ((u64)cdb[2]) << 24;
1466 lba |= ((u64)cdb[3]) << 16;
1467 lba |= ((u64)cdb[4]) << 8;
1468 lba |= ((u64)cdb[5]);
3aef5231 1469
542b1444
TH		 1470 len |= ((u32)cdb[7]) << 8;
1471 len |= ((u32)cdb[8]);
3aef5231
AL		 1472
1473 *plba = lba;
1474 *plen = len;
1475}
1476
1477/**
1478 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1479 * @cdb: SCSI command to translate
3aef5231
AL		 1480 *
1481 * Calculate LBA and transfer length for 16-byte commands.
1482 *
1483 * RETURNS:
1484 * @plba: the LBA
1485 * @plen: the transfer length
1486 */
542b1444 1487static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1488{
1489 u64 lba = 0;
1490 u32 len = 0;
1491
1492 VPRINTK("sixteen-byte command\n");
1493
542b1444
TH		 1494 lba |= ((u64)cdb[2]) << 56;
1495 lba |= ((u64)cdb[3]) << 48;
1496 lba |= ((u64)cdb[4]) << 40;
1497 lba |= ((u64)cdb[5]) << 32;
1498 lba |= ((u64)cdb[6]) << 24;
1499 lba |= ((u64)cdb[7]) << 16;
1500 lba |= ((u64)cdb[8]) << 8;
1501 lba |= ((u64)cdb[9]);
3aef5231 1502
542b1444
TH		 1503 len |= ((u32)cdb[10]) << 24;
1504 len |= ((u32)cdb[11]) << 16;
1505 len |= ((u32)cdb[12]) << 8;
1506 len |= ((u32)cdb[13]);
3aef5231
AL		 1507
1508 *plba = lba;
1509 *plen = len;
1510}
1511
1da177e4
LT		 1512/**
1513 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1514 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1515 *
1516 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1517 *
1518 * LOCKING:
cca3974e 1519 * spin_lock_irqsave(host lock)
1da177e4
LT		 1520 *
1521 * RETURNS:
1522 * Zero on success, non-zero on error.
1523 */
ad706991 1524static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1525{
542b1444 1526 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1527 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1528 struct ata_device *dev = qc->dev;
1da177e4 1529 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1530 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1531 u64 block;
1532 u32 n_block;
1da177e4
LT		 1533
1534 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1535 tf->protocol = ATA_PROT_NODATA;
1da177e4 1536
2e5704f6
TH		 1537 if (cdb[0] == VERIFY) {
1538 if (scmd->cmd_len < 10)
1539 goto invalid_fld;
542b1444 1540 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1541 } else if (cdb[0] == VERIFY_16) {
1542 if (scmd->cmd_len < 16)
1543 goto invalid_fld;
542b1444 1544 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1545 } else
ae006510 1546 goto invalid_fld;
1da177e4 1547
8bf62ece 1548 if (!n_block)
ae006510 1549 goto nothing_to_do;
8bf62ece 1550 if (block >= dev_sectors)
ae006510 1551 goto out_of_range;
8bf62ece 1552 if ((block + n_block) > dev_sectors)
ae006510 1553 goto out_of_range;
1da177e4 1554
07506697
AL		 1555 if (dev->flags & ATA_DFLAG_LBA) {
1556 tf->flags |= ATA_TFLAG_LBA;
1557
c6a33e24
AL		 1558 if (lba_28_ok(block, n_block)) {
1559 /* use LBA28 */
1560 tf->command = ATA_CMD_VERIFY;
1561 tf->device |= (block >> 24) & 0xf;
1562 } else if (lba_48_ok(block, n_block)) {
1563 if (!(dev->flags & ATA_DFLAG_LBA48))
1564 goto out_of_range;
07506697
AL		 1565
1566 /* use LBA48 */
1567 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1568 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1569
8bf62ece 1570 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1571
8bf62ece
AL		 1572 tf->hob_lbah = (block >> 40) & 0xff;
1573 tf->hob_lbam = (block >> 32) & 0xff;
1574 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1575 } else
1576 /* request too large even for LBA48 */
1577 goto out_of_range;
8bf62ece
AL		 1578
1579 tf->nsect = n_block & 0xff;
1da177e4 1580
8bf62ece
AL		 1581 tf->lbah = (block >> 16) & 0xff;
1582 tf->lbam = (block >> 8) & 0xff;
1583 tf->lbal = block & 0xff;
1da177e4 1584
8bf62ece
AL		 1585 tf->device |= ATA_LBA;
1586 } else {
1587 /* CHS */
1588 u32 sect, head, cyl, track;
1589
c6a33e24
AL		 1590 if (!lba_28_ok(block, n_block))
1591 goto out_of_range;
07506697 1592
8bf62ece
AL		 1593 /* Convert LBA to CHS */
1594 track = (u32)block / dev->sectors;
1595 cyl = track / dev->heads;
1596 head = track % dev->heads;
1597 sect = (u32)block % dev->sectors + 1;
1598
c187c4b5
AL		 1599 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1600 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1601
1602 /* Check whether the converted CHS can fit.
1603 Cylinder: 0-65535
8bf62ece
AL		 1604 Head: 0-15
1605 Sector: 1-255*/
2e9edbf8 1606 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1607 goto out_of_range;
2e9edbf8 1608
8bf62ece
AL		 1609 tf->command = ATA_CMD_VERIFY;
1610 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1611 tf->lbal = sect;
1612 tf->lbam = cyl;
1613 tf->lbah = cyl >> 8;
1614 tf->device |= head;
1615 }
1da177e4
LT		 1616
1617 return 0;
ae006510
DG		 1618
1619invalid_fld:
542b1444 1620 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1621 /* "Invalid field in cbd" */
1622 return 1;
1623
1624out_of_range:
542b1444 1625 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1626 /* "Logical Block Address out of range" */
1627 return 1;
1628
1629nothing_to_do:
542b1444 1630 scmd->result = SAM_STAT_GOOD;
ae006510 1631 return 1;
1da177e4
LT		 1632}
1633
1634/**
1635 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1636 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1637 *
1638 * Converts any of six SCSI read/write commands into the
1639 * ATA counterpart, including starting sector (LBA),
1640 * sector count, and taking into account the device's LBA48
1641 * support.
1642 *
1643 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1644 * %WRITE_16 are currently supported.
1645 *
1646 * LOCKING:
cca3974e 1647 * spin_lock_irqsave(host lock)
1da177e4
LT		 1648 *
1649 * RETURNS:
1650 * Zero on success, non-zero on error.
1651 */
ad706991 1652static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1653{
542b1444 1654 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1655 const u8 *cdb = scmd->cmnd;
bd056d7e 1656 unsigned int tf_flags = 0;
3aef5231
AL		 1657 u64 block;
1658 u32 n_block;
bd056d7e 1659 int rc;
1da177e4 1660
542b1444 1661 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1662 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1663
9a3dccc4 1664 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1665 switch (cdb[0]) {
3aef5231
AL		 1666 case READ_10:
1667 case WRITE_10:
2e5704f6
TH		 1668 if (unlikely(scmd->cmd_len < 10))
1669 goto invalid_fld;
542b1444
TH		 1670 scsi_10_lba_len(cdb, &block, &n_block);
1671 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1672 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1673 break;
1674 case READ_6:
1675 case WRITE_6:
2e5704f6
TH		 1676 if (unlikely(scmd->cmd_len < 6))
1677 goto invalid_fld;
542b1444 1678 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1679
1680 /* for 6-byte r/w commands, transfer length 0
1681 * means 256 blocks of data, not 0 block.
1682 */
76b2bf9b
JG		 1683 if (!n_block)
1684 n_block = 256;
3aef5231
AL		 1685 break;
1686 case READ_16:
1687 case WRITE_16:
2e5704f6
TH		 1688 if (unlikely(scmd->cmd_len < 16))
1689 goto invalid_fld;
542b1444
TH		 1690 scsi_16_lba_len(cdb, &block, &n_block);
1691 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1692 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1693 break;
1694 default:
8bf62ece 1695 DPRINTK("no-byte command\n");
ae006510 1696 goto invalid_fld;
1da177e4
LT		 1697 }
1698
8bf62ece
AL		 1699 /* Check and compose ATA command */
1700 if (!n_block)
c187c4b5
AL		 1701 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1702 * length 0 means transfer 0 block of data.
1703 * However, for ATA R/W commands, sector count 0 means
1704 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1705 *
1706 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1707 */
ae006510 1708 goto nothing_to_do;
1da177e4 1709
bd056d7e 1710 qc->flags |= ATA_QCFLAG_IO;
726f0785 1711 qc->nbytes = n_block * ATA_SECT_SIZE;
1da177e4 1712
bd056d7e
TH		 1713 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1714 qc->tag);
1715 if (likely(rc == 0))
1716 return 0;
ae006510 1717
bd056d7e
TH		 1718 if (rc == -ERANGE)
1719 goto out_of_range;
1720 /* treat all other errors as -EINVAL, fall through */
ae006510 1721invalid_fld:
542b1444 1722 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1723 /* "Invalid field in cbd" */
1724 return 1;
1725
1726out_of_range:
542b1444 1727 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1728 /* "Logical Block Address out of range" */
1729 return 1;
1730
1731nothing_to_do:
542b1444 1732 scmd->result = SAM_STAT_GOOD;
ae006510 1733 return 1;
1da177e4
LT		 1734}
1735
77853bf2 1736static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1737{
c31f571d 1738 struct ata_port *ap = qc->ap;
1da177e4 1739 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1740 u8 *cdb = cmd->cmnd;
2dcb407e 1741 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1742
1743 /* For ATA pass thru (SAT) commands, generate a sense block if
1744 * user mandated it or if there's an error. Note that if we
1745 * generate because the user forced us to, a check condition
1746 * is generated and the ATA register values are returned
1747 * whether the command completed successfully or not. If there
1748 * was no error, SK, ASC and ASCQ will all be zero.
1749 */
a7dac447 1750 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
2dcb407e 1751 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1752 ata_gen_passthru_sense(qc);
b095518e
JG		 1753 } else {
1754 if (!need_sense) {
1755 cmd->result = SAM_STAT_GOOD;
1756 } else {
1757 /* TODO: decide which descriptor format to use
1758 * for 48b LBA devices and call that here
1759 * instead of the fixed desc, which is only
1760 * good for smaller LBA (and maybe CHS?)
1761 * devices.
1762 */
750426aa 1763 ata_gen_ata_sense(qc);
b095518e
JG		 1764 }
1765 }
1da177e4 1766
d9aca22c 1767 /* XXX: track spindown state for spindown skipping and warning */
13b8d09f
TH		 1768 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1769 qc->tf.command == ATA_CMD_STANDBYNOW1))
1770 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1771 else if (likely(system_state != SYSTEM_HALT &&
1772 system_state != SYSTEM_POWER_OFF))
1773 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1774
c31f571d 1775 if (need_sense && !ap->ops->error_handler)
44877b4e 1776 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1777
1778 qc->scsidone(cmd);
1779
77853bf2 1780 ata_qc_free(qc);
1da177e4
LT		 1781}
1782
1783/**
1784 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1785 * @dev: ATA device to which the command is addressed
1786 * @cmd: SCSI command to execute
1787 * @done: SCSI command completion function
1788 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1789 *
1790 * Our ->queuecommand() function has decided that the SCSI
1791 * command issued can be directly translated into an ATA
1792 * command, rather than handled internally.
1793 *
1794 * This function sets up an ata_queued_cmd structure for the
1795 * SCSI command, and sends that ata_queued_cmd to the hardware.
1796 *
ae006510
DG		 1797 * The xlat_func argument (actor) returns 0 if ready to execute
1798 * ATA command, else 1 to finish translation. If 1 is returned
1799 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1800 * to be set reflecting an error condition or clean (early)
1801 * termination.
1802 *
1da177e4 1803 * LOCKING:
cca3974e 1804 * spin_lock_irqsave(host lock)
2115ea94
TH		 1805 *
1806 * RETURNS:
1807 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1808 * needs to be deferred.
1da177e4 1809 */
2115ea94
TH		 1810static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1811 void (*done)(struct scsi_cmnd *),
1812 ata_xlat_func_t xlat_func)
1da177e4 1813{
31cc23b3 1814 struct ata_port *ap = dev->link->ap;
1da177e4 1815 struct ata_queued_cmd *qc;
31cc23b3 1816 int rc;
1da177e4
LT		 1817
1818 VPRINTK("ENTER\n");
1819
3373efd8 1820 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1821 if (!qc)
ae006510 1822 goto err_mem;
1da177e4
LT		 1823
1824 /* data is present; dma-map it */
be7db055
CH		 1825 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1826 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1827 if (unlikely(scsi_bufflen(cmd) < 1)) {
f15a1daf
TH		 1828 ata_dev_printk(dev, KERN_WARNING,
1829 "WARNING: zero len r/w req\n");
ae006510 1830 goto err_did;
1da177e4
LT		 1831 }
1832
7120165c 1833 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1834
1835 qc->dma_dir = cmd->sc_data_direction;
1836 }
1837
1838 qc->complete_fn = ata_scsi_qc_complete;
1839
ad706991 1840 if (xlat_func(qc))
ae006510 1841 goto early_finish;
1da177e4 1842
31cc23b3
TH		 1843 if (ap->ops->qc_defer) {
1844 if ((rc = ap->ops->qc_defer(qc)))
1845 goto defer;
1846 }
1847
1da177e4 1848 /* select device, send command to hardware */
8e0e694a 1849 ata_qc_issue(qc);
1da177e4
LT		 1850
1851 VPRINTK("EXIT\n");
2115ea94 1852 return 0;
1da177e4 1853
ae006510 1854early_finish:
2dcb407e 1855 ata_qc_free(qc);
da071b42 1856 qc->scsidone(cmd);
ae006510 1857 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1858 return 0;
ae006510
DG		 1859
1860err_did:
1da177e4 1861 ata_qc_free(qc);
ae006510 1862 cmd->result = (DID_ERROR << 16);
da071b42 1863 qc->scsidone(cmd);
253b92ec 1864err_mem:
ae006510 1865 DPRINTK("EXIT - internal\n");
2115ea94 1866 return 0;
3dc1d881
TH		 1867
1868defer:
31cc23b3 1869 ata_qc_free(qc);
3dc1d881 1870 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1871 if (rc == ATA_DEFER_LINK)
1872 return SCSI_MLQUEUE_DEVICE_BUSY;
1873 else
1874 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1875}
1876
1877/**
1878 * ata_scsi_rbuf_get - Map response buffer.
ec2a20e6 1879 * @cmd: SCSI command containing buffer to be mapped.
87340e98
TH		 1880 * @flags: unsigned long variable to store irq enable status
1881 * @copy_in: copy in from user buffer
1da177e4 1882 *
87340e98 1883 * Prepare buffer for simulated SCSI commands.
1da177e4
LT		 1884 *
1885 * LOCKING:
87340e98 1886 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1da177e4
LT		 1887 *
1888 * RETURNS:
87340e98 1889 * Pointer to response buffer.
1da177e4 1890 */
87340e98
TH		 1891static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1892 unsigned long *flags)
1da177e4 1893{
87340e98 1894 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1da177e4 1895
87340e98
TH		 1896 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1897 if (copy_in)
1898 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1899 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1900 return ata_scsi_rbuf;
1da177e4
LT		 1901}
1902
1903/**
1904 * ata_scsi_rbuf_put - Unmap response buffer.
1905 * @cmd: SCSI command containing buffer to be unmapped.
87340e98
TH		 1906 * @copy_out: copy out result
1907 * @flags: @flags passed to ata_scsi_rbuf_get()
1da177e4 1908 *
87340e98
TH		 1909 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1910 * @copy_back is true.
1da177e4
LT		 1911 *
1912 * LOCKING:
87340e98 1913 * Unlocks ata_scsi_rbuf_lock.
1da177e4 1914 */
87340e98
TH		 1915static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1916 unsigned long *flags)
1da177e4 1917{
87340e98
TH		 1918 if (copy_out)
1919 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1920 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1921 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1da177e4
LT		 1922}
1923
1924/**
1925 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1926 * @args: device IDENTIFY data / SCSI command of interest.
1927 * @actor: Callback hook for desired SCSI command simulator
1928 *
1929 * Takes care of the hard work of simulating a SCSI command...
1930 * Mapping the response buffer, calling the command's handler,
1931 * and handling the handler's return value. This return value
1932 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1933 * completed successfully (0), or not (in which case cmd->result
1934 * and sense buffer are assumed to be set).
1da177e4
LT		 1935 *
1936 * LOCKING:
cca3974e 1937 * spin_lock_irqsave(host lock)
1da177e4 1938 */
f0761be3 1939static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
87340e98 1940 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1da177e4
LT		 1941{
1942 u8 *rbuf;
87340e98 1943 unsigned int rc;
1da177e4 1944 struct scsi_cmnd *cmd = args->cmd;
b445c568
JG		 1945 unsigned long flags;
1946
87340e98
TH		 1947 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1948 rc = actor(args, rbuf);
1949 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
b445c568 1950
ae006510 1951 if (rc == 0)
1da177e4 1952 cmd->result = SAM_STAT_GOOD;
ae006510 1953 args->done(cmd);
1da177e4
LT		 1954}
1955
1956/**
1957 * ata_scsiop_inq_std - Simulate INQUIRY command
1958 * @args: device IDENTIFY data / SCSI command of interest.
1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 1960 *
1961 * Returns standard device identification data associated
b142eb65 1962 * with non-VPD INQUIRY command output.
1da177e4
LT		 1963 *
1964 * LOCKING:
cca3974e 1965 * spin_lock_irqsave(host lock)
1da177e4 1966 */
87340e98 1967static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 1968{
87340e98
TH		 1969 const u8 versions[] = {
1970 0x60, /* SAM-3 (no version claimed) */
1971
1972 0x03,
1973 0x20, /* SBC-2 (no version claimed) */
1974
1975 0x02,
1976 0x60 /* SPC-3 (no version claimed) */
1977 };
1da177e4
LT		 1978 u8 hdr[] = {
1979 TYPE_DISK,
1980 0,
1981 0x5, /* claim SPC-3 version compatibility */
1982 2,
1983 95 - 4
1984 };
1985
87340e98
TH		 1986 VPRINTK("ENTER\n");
1987
1da177e4
LT		 1988 /* set scsi removeable (RMB) bit per ata bit */
1989 if (ata_id_removeable(args->id))
1990 hdr[1] |= (1 << 7);
1991
1da177e4 1992 memcpy(rbuf, hdr, sizeof(hdr));
87340e98
TH		 1993 memcpy(&rbuf[8], "ATA ", 8);
1994 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1995 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4 1996
87340e98
TH		 1997 if (rbuf[32] == 0 || rbuf[32] == ' ')
1998 memcpy(&rbuf[32], "n/a ", 4);
1da177e4 1999
87340e98 2000 memcpy(rbuf + 59, versions, sizeof(versions));
1da177e4
LT		 2001
2002 return 0;
2003}
2004
2005/**
b142eb65 2006 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 2007 * @args: device IDENTIFY data / SCSI command of interest.
2008 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2009 *
b142eb65 2010 * Returns list of inquiry VPD pages available.
1da177e4
LT		 2011 *
2012 * LOCKING:
cca3974e 2013 * spin_lock_irqsave(host lock)
1da177e4 2014 */
87340e98 2015static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2016{
2017 const u8 pages[] = {
2018 0x00, /* page 0x00, this page */
2019 0x80, /* page 0x80, unit serial no page */
1e9dbc92
MW		 2020 0x83, /* page 0x83, device ident page */
2021 0x89, /* page 0x89, ata info page */
2022 0xb1, /* page 0xb1, block device characteristics page */
1da177e4 2023 };
1da177e4 2024
87340e98
TH		 2025 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2026 memcpy(rbuf + 4, pages, sizeof(pages));
1da177e4
LT		 2027 return 0;
2028}
2029
2030/**
b142eb65 2031 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 2032 * @args: device IDENTIFY data / SCSI command of interest.
2033 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2034 *
2035 * Returns ATA device serial number.
2036 *
2037 * LOCKING:
cca3974e 2038 * spin_lock_irqsave(host lock)
1da177e4 2039 */
87340e98 2040static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2041{
2042 const u8 hdr[] = {
2043 0,
2044 0x80, /* this page code */
2045 0,
a0cf733b 2046 ATA_ID_SERNO_LEN, /* page len */
1da177e4 2047 };
1da177e4 2048
87340e98
TH		 2049 memcpy(rbuf, hdr, sizeof(hdr));
2050 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2051 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 2052 return 0;
2053}
2054
1da177e4 2055/**
b142eb65 2056 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 2057 * @args: device IDENTIFY data / SCSI command of interest.
2058 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2059 *
b142eb65
JG		 2060 * Yields two logical unit device identification designators:
2061 * - vendor specific ASCII containing the ATA serial number
2062 * - SAT defined "t10 vendor id based" containing ASCII vendor
2063 * name ("ATA "), model and serial numbers.
1da177e4
LT		 2064 *
2065 * LOCKING:
cca3974e 2066 * spin_lock_irqsave(host lock)
1da177e4 2067 */
87340e98 2068static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2069{
b142eb65 2070 const int sat_model_serial_desc_len = 68;
87340e98 2071 int num;
1da177e4 2072
b142eb65
JG		 2073 rbuf[1] = 0x83; /* this page code */
2074 num = 4;
2075
87340e98
TH		 2076 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2077 rbuf[num + 0] = 2;
2078 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2079 num += 4;
2080 ata_id_string(args->id, (unsigned char *) rbuf + num,
2081 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2082 num += ATA_ID_SERNO_LEN;
2083
2084 /* SAT defined lu model and serial numbers descriptor */
2085 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2086 rbuf[num + 0] = 2;
2087 rbuf[num + 1] = 1;
2088 rbuf[num + 3] = sat_model_serial_desc_len;
2089 num += 4;
2090 memcpy(rbuf + num, "ATA ", 8);
2091 num += 8;
2092 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2093 ATA_ID_PROD_LEN);
2094 num += ATA_ID_PROD_LEN;
2095 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2096 ATA_ID_SERNO_LEN);
2097 num += ATA_ID_SERNO_LEN;
2098
b142eb65 2099 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 2100 return 0;
2101}
2102
ad355b46
JG		 2103/**
2104 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2105 * @args: device IDENTIFY data / SCSI command of interest.
2106 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
ad355b46
JG		 2107 *
2108 * Yields SAT-specified ATA VPD page.
2109 *
2110 * LOCKING:
2111 * spin_lock_irqsave(host lock)
2112 */
87340e98 2113static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
ad355b46 2114{
ad355b46 2115 struct ata_taskfile tf;
ad355b46 2116
ad355b46
JG		 2117 memset(&tf, 0, sizeof(tf));
2118
87340e98
TH		 2119 rbuf[1] = 0x89; /* our page code */
2120 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2121 rbuf[3] = (0x238 & 0xff);
ad355b46 2122
87340e98
TH		 2123 memcpy(&rbuf[8], "linux ", 8);
2124 memcpy(&rbuf[16], "libata ", 16);
2125 memcpy(&rbuf[32], DRV_VERSION, 4);
2126 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
ad355b46
JG		 2127
2128 /* we don't store the ATA device signature, so we fake it */
2129
2130 tf.command = ATA_DRDY; /* really, this is Status reg */
2131 tf.lbal = 0x1;
2132 tf.nsect = 0x1;
2133
87340e98
TH		 2134 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2135 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
ad355b46 2136
87340e98 2137 rbuf[56] = ATA_CMD_ID_ATA;
ad355b46 2138
87340e98 2139 memcpy(&rbuf[60], &args->id[0], 512);
ad355b46
JG		 2140 return 0;
2141}
2142
1e9dbc92
MW		 2143static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2144{
2145 rbuf[1] = 0xb1;
2146 rbuf[3] = 0x3c;
2147 if (ata_id_major_version(args->id) > 7) {
2148 rbuf[4] = args->id[217] >> 8;
2149 rbuf[5] = args->id[217];
2150 rbuf[7] = args->id[168] & 0xf;
2151 }
2152
2153 return 0;
2154}
2155
1da177e4 2156/**
0cba632b 2157 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 2158 * @args: device IDENTIFY data / SCSI command of interest.
2159 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2160 *
2161 * No operation. Simply returns success to caller, to indicate
2162 * that the caller should successfully complete this SCSI command.
2163 *
2164 * LOCKING:
cca3974e 2165 * spin_lock_irqsave(host lock)
1da177e4 2166 */
87340e98 2167static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2168{
2169 VPRINTK("ENTER\n");
2170 return 0;
2171}
2172
1da177e4
LT		 2173/**
2174 * ata_msense_caching - Simulate MODE SENSE caching info page
2175 * @id: device IDENTIFY data
87340e98 2176 * @buf: output buffer
1da177e4
LT		 2177 *
2178 * Generate a caching info page, which conditionally indicates
2179 * write caching to the SCSI layer, depending on device
2180 * capabilities.
2181 *
2182 * LOCKING:
2183 * None.
2184 */
87340e98 2185static unsigned int ata_msense_caching(u16 *id, u8 *buf)
1da177e4 2186{
87340e98 2187 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
1da177e4 2188 if (ata_id_wcache_enabled(id))
87340e98 2189 buf[2] |= (1 << 2); /* write cache enable */
1da177e4 2190 if (!ata_id_rahead_enabled(id))
87340e98
TH		 2191 buf[12] |= (1 << 5); /* disable read ahead */
2192 return sizeof(def_cache_mpage);
1da177e4
LT		 2193}
2194
2195/**
2196 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
87340e98 2197 * @buf: output buffer
1da177e4
LT		 2198 *
2199 * Generate a generic MODE SENSE control mode page.
2200 *
2201 * LOCKING:
2202 * None.
2203 */
87340e98 2204static unsigned int ata_msense_ctl_mode(u8 *buf)
1da177e4 2205{
87340e98 2206 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
00ac37f5 2207 return sizeof(def_control_mpage);
1da177e4
LT		 2208}
2209
2210/**
2211 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
ec2a20e6 2212 * @buf: output buffer
1da177e4
LT		 2213 *
2214 * Generate a generic MODE SENSE r/w error recovery page.
2215 *
2216 * LOCKING:
2217 * None.
2218 */
87340e98 2219static unsigned int ata_msense_rw_recovery(u8 *buf)
1da177e4 2220{
87340e98 2221 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
00ac37f5 2222 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2223}
2224
48bdc8ec
JA		 2225/*
2226 * We can turn this into a real blacklist if it's needed, for now just
2227 * blacklist any Maxtor BANC1G10 revision firmware
2228 */
2229static int ata_dev_supports_fua(u16 *id)
2230{
a0cf733b 2231 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 2232
c3c013a2
JG		 2233 if (!libata_fua)
2234 return 0;
48bdc8ec
JA		 2235 if (!ata_id_has_fua(id))
2236 return 0;
2237
a0cf733b
TH		 2238 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2239 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 2240
2e02671d 2241 if (strcmp(model, "Maxtor"))
48bdc8ec 2242 return 1;
2e02671d 2243 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2244 return 1;
2245
2246 return 0; /* blacklisted */
2247}
2248
1da177e4
LT		 2249/**
2250 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2251 * @args: device IDENTIFY data / SCSI command of interest.
2252 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4 2253 *
00ac37f5
DG		 2254 * Simulate MODE SENSE commands. Assume this is invoked for direct
2255 * access devices (e.g. disks) only. There should be no block
2256 * descriptor for other device types.
1da177e4
LT		 2257 *
2258 * LOCKING:
cca3974e 2259 * spin_lock_irqsave(host lock)
1da177e4 2260 */
87340e98 2261static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2262{
9a3dccc4 2263 struct ata_device *dev = args->dev;
87340e98 2264 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
00ac37f5
DG		 2265 const u8 sat_blk_desc[] = {
2266 0, 0, 0, 0, /* number of blocks: sat unspecified */
2267 0,
2268 0, 0x2, 0x0 /* block length: 512 bytes */
2269 };
2270 u8 pg, spg;
87340e98 2271 unsigned int ebd, page_control, six_byte;
9a3dccc4 2272 u8 dpofua;
1da177e4
LT		 2273
2274 VPRINTK("ENTER\n");
2275
2276 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2277 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2278 /*
2279 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2280 */
00ac37f5 2281
1da177e4 2282 page_control = scsicmd[2] >> 6;
ae006510
DG		 2283 switch (page_control) {
2284 case 0: /* current */
2285 break; /* supported */
2286 case 3: /* saved */
2287 goto saving_not_supp;
2288 case 1: /* changeable */
2289 case 2: /* defaults */
2290 default:
2291 goto invalid_fld;
2292 }
1da177e4 2293
87340e98
TH		 2294 if (six_byte)
2295 p += 4 + (ebd ? 8 : 0);
2296 else
2297 p += 8 + (ebd ? 8 : 0);
1da177e4 2298
00ac37f5
DG		 2299 pg = scsicmd[2] & 0x3f;
2300 spg = scsicmd[3];
2301 /*
2302 * No mode subpages supported (yet) but asking for _all_
2303 * subpages may be valid
2304 */
2305 if (spg && (spg != ALL_SUB_MPAGES))
2306 goto invalid_fld;
2307
2308 switch(pg) {
2309 case RW_RECOVERY_MPAGE:
87340e98 2310 p += ata_msense_rw_recovery(p);
1da177e4
LT		 2311 break;
2312
00ac37f5 2313 case CACHE_MPAGE:
87340e98 2314 p += ata_msense_caching(args->id, p);
1da177e4
LT		 2315 break;
2316
87340e98
TH		 2317 case CONTROL_MPAGE:
2318 p += ata_msense_ctl_mode(p);
1da177e4 2319 break;
1da177e4 2320
00ac37f5 2321 case ALL_MPAGES:
87340e98
TH		 2322 p += ata_msense_rw_recovery(p);
2323 p += ata_msense_caching(args->id, p);
2324 p += ata_msense_ctl_mode(p);
1da177e4
LT		 2325 break;
2326
2327 default: /* invalid page code */
ae006510 2328 goto invalid_fld;
1da177e4
LT		 2329 }
2330
9a3dccc4 2331 dpofua = 0;
f79d409f 2332 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2333 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2334 dpofua = 1 << 4;
2335
1da177e4 2336 if (six_byte) {
87340e98
TH		 2337 rbuf[0] = p - rbuf - 1;
2338 rbuf[2] |= dpofua;
00ac37f5 2339 if (ebd) {
87340e98
TH		 2340 rbuf[3] = sizeof(sat_blk_desc);
2341 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2342 }
1da177e4 2343 } else {
87340e98
TH		 2344 unsigned int output_len = p - rbuf - 2;
2345
1da177e4 2346 rbuf[0] = output_len >> 8;
87340e98
TH		 2347 rbuf[1] = output_len;
2348 rbuf[3] |= dpofua;
00ac37f5 2349 if (ebd) {
87340e98
TH		 2350 rbuf[7] = sizeof(sat_blk_desc);
2351 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
00ac37f5 2352 }
1da177e4 2353 }
1da177e4 2354 return 0;
ae006510
DG		 2355
2356invalid_fld:
2357 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2358 /* "Invalid field in cbd" */
2359 return 1;
2360
2361saving_not_supp:
2362 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2363 /* "Saving parameters not supported" */
2364 return 1;
1da177e4
LT		 2365}
2366
2367/**
2368 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2369 * @args: device IDENTIFY data / SCSI command of interest.
2370 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2371 *
2372 * Simulate READ CAPACITY commands.
2373 *
2374 * LOCKING:
6a36261e 2375 * None.
1da177e4 2376 */
87340e98 2377static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
1da177e4 2378{
6a36261e 2379 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2380
2381 VPRINTK("ENTER\n");
2382
1da177e4 2383 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2384 if (last_lba >= 0xffffffffULL)
2385 last_lba = 0xffffffff;
0c144d0d 2386
1da177e4 2387 /* sector count, 32-bit */
87340e98
TH		 2388 rbuf[0] = last_lba >> (8 * 3);
2389 rbuf[1] = last_lba >> (8 * 2);
2390 rbuf[2] = last_lba >> (8 * 1);
2391 rbuf[3] = last_lba;
1da177e4
LT		 2392
2393 /* sector size */
87340e98
TH		 2394 rbuf[6] = ATA_SECT_SIZE >> 8;
2395 rbuf[7] = ATA_SECT_SIZE & 0xff;
1da177e4
LT		 2396 } else {
2397 /* sector count, 64-bit */
87340e98
TH		 2398 rbuf[0] = last_lba >> (8 * 7);
2399 rbuf[1] = last_lba >> (8 * 6);
2400 rbuf[2] = last_lba >> (8 * 5);
2401 rbuf[3] = last_lba >> (8 * 4);
2402 rbuf[4] = last_lba >> (8 * 3);
2403 rbuf[5] = last_lba >> (8 * 2);
2404 rbuf[6] = last_lba >> (8 * 1);
2405 rbuf[7] = last_lba;
1da177e4
LT		 2406
2407 /* sector size */
87340e98
TH		 2408 rbuf[10] = ATA_SECT_SIZE >> 8;
2409 rbuf[11] = ATA_SECT_SIZE & 0xff;
1da177e4
LT		 2410 }
2411
2412 return 0;
2413}
2414
2415/**
2416 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2417 * @args: device IDENTIFY data / SCSI command of interest.
2418 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1da177e4
LT		 2419 *
2420 * Simulate REPORT LUNS command.
2421 *
2422 * LOCKING:
cca3974e 2423 * spin_lock_irqsave(host lock)
1da177e4 2424 */
87340e98 2425static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
1da177e4
LT		 2426{
2427 VPRINTK("ENTER\n");
2428 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2429
2430 return 0;
2431}
2432
77853bf2 2433static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2434{
74e6c8c3 2435 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2436 /* FIXME: not quite right; we don't want the
2437 * translation of taskfile registers into
2438 * a sense descriptors, since that's only
2439 * correct for ATA, not ATAPI
2440 */
750426aa 2441 ata_gen_passthru_sense(qc);
74e6c8c3 2442 }
a939c963 2443
c6e6e666 2444 qc->scsidone(qc->scsicmd);
77853bf2 2445 ata_qc_free(qc);
c6e6e666 2446}
a939c963 2447
c6e6e666
JG		 2448/* is it pointless to prefer PIO for "safety reasons"? */
2449static inline int ata_pio_use_silly(struct ata_port *ap)
2450{
2451 return (ap->flags & ATA_FLAG_PIO_DMA);
2452}
2453
2454static void atapi_request_sense(struct ata_queued_cmd *qc)
2455{
2456 struct ata_port *ap = qc->ap;
2457 struct scsi_cmnd *cmd = qc->scsicmd;
2458
2459 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2460
2461 /* FIXME: is this needed? */
7ccd720d 2462 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
a939c963 2463
127102ae 2464#ifdef CONFIG_ATA_SFF
855d854a
JB		 2465 if (ap->ops->sff_tf_read)
2466 ap->ops->sff_tf_read(ap, &qc->tf);
127102ae 2467#endif
c6e6e666
JG		 2468
2469 /* fill these in, for the case where they are -not- overwritten */
2470 cmd->sense_buffer[0] = 0x70;
2471 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2472
2473 ata_qc_reinit(qc);
2474
93f8fecb 2475 /* setup sg table and init transfer direction */
cadb7345 2476 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
93f8fecb 2477 ata_sg_init(qc, &qc->sgent, 1);
a939c963
JG		 2478 qc->dma_dir = DMA_FROM_DEVICE;
2479
6e7846e9 2480 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2481 qc->cdb[0] = REQUEST_SENSE;
2482 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2483
2484 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2485 qc->tf.command = ATA_CMD_PACKET;
2486
c6e6e666 2487 if (ata_pio_use_silly(ap)) {
0dc36888 2488 qc->tf.protocol = ATAPI_PROT_DMA;
c6e6e666
JG		 2489 qc->tf.feature |= ATAPI_PKT_DMA;
2490 } else {
0dc36888 2491 qc->tf.protocol = ATAPI_PROT_PIO;
2db78dd3
AC		 2492 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2493 qc->tf.lbah = 0;
c6e6e666 2494 }
a939c963
JG		 2495 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2496
c6e6e666 2497 qc->complete_fn = atapi_sense_complete;
a939c963 2498
8e0e694a 2499 ata_qc_issue(qc);
a939c963
JG		 2500
2501 DPRINTK("EXIT\n");
2502}
2503
77853bf2 2504static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2505{
2506 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2507 unsigned int err_mask = qc->err_mask;
1da177e4 2508
a7dac447 2509 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2510
246619da
TH		 2511 /* handle completion from new EH */
2512 if (unlikely(qc->ap->ops->error_handler &&
2513 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2514
2515 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2516 /* FIXME: not quite right; we don't want the
2517 * translation of taskfile registers into a
2518 * sense descriptors, since that's only
2519 * correct for ATA, not ATAPI
2520 */
750426aa 2521 ata_gen_passthru_sense(qc);
246619da
TH		 2522 }
2523
22aac089
TH		 2524 /* SCSI EH automatically locks door if sdev->locked is
2525 * set. Sometimes door lock request continues to
2526 * fail, for example, when no media is present. This
2527 * creates a loop - SCSI EH issues door lock which
2528 * fails and gets invoked again to acquire sense data
2529 * for the failed command.
2530 *
2531 * If door lock fails, always clear sdev->locked to
2532 * avoid this infinite loop.
2533 */
2534 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2535 qc->dev->sdev->locked = 0;
2536
246619da
TH		 2537 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2538 qc->scsidone(cmd);
2539 ata_qc_free(qc);
2540 return;
2541 }
2542
2543 /* successful completion or old EH failure path */
a7dac447 2544 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2545 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2546 atapi_request_sense(qc);
77853bf2 2547 return;
74e6c8c3 2548 } else if (unlikely(err_mask)) {
a7dac447
JG		 2549 /* FIXME: not quite right; we don't want the
2550 * translation of taskfile registers into
2551 * a sense descriptors, since that's only
2552 * correct for ATA, not ATAPI
2553 */
750426aa 2554 ata_gen_passthru_sense(qc);
74e6c8c3 2555 } else {
1da177e4
LT		 2556 u8 *scsicmd = cmd->cmnd;
2557
fd71da46 2558 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
b445c568 2559 unsigned long flags;
87340e98 2560 u8 *buf;
b445c568 2561
87340e98 2562 buf = ata_scsi_rbuf_get(cmd, true, &flags);
a15dbeb4
JG		 2563
2564 /* ATAPI devices typically report zero for their SCSI version,
2565 * and sometimes deviate from the spec WRT response data
2566 * format. If SCSI version is reported as zero like normal,
2567 * then we make the following fixups: 1) Fake MMC-5 version,
2568 * to indicate to the Linux scsi midlayer this is a modern
2569 * device. 2) Ensure response data format / ATAPI information
2570 * are always correct.
a15dbeb4
JG		 2571 */
2572 if (buf[2] == 0) {
2573 buf[2] = 0x5;
2574 buf[3] = 0x32;
2575 }
2576
87340e98 2577 ata_scsi_rbuf_put(cmd, true, &flags);
1da177e4 2578 }
a15dbeb4 2579
1da177e4
LT		 2580 cmd->result = SAM_STAT_GOOD;
2581 }
2582
2583 qc->scsidone(cmd);
77853bf2 2584 ata_qc_free(qc);
1da177e4
LT		 2585}
2586/**
2587 * atapi_xlat - Initialize PACKET taskfile
2588 * @qc: command structure to be initialized
1da177e4
LT		 2589 *
2590 * LOCKING:
cca3974e 2591 * spin_lock_irqsave(host lock)
1da177e4
LT		 2592 *
2593 * RETURNS:
2594 * Zero on success, non-zero on failure.
2595 */
ad706991 2596static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2597{
542b1444 2598 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 2599 struct ata_device *dev = qc->dev;
542b1444 2600 int nodata = (scmd->sc_data_direction == DMA_NONE);
5895ef9a 2601 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2db78dd3 2602 unsigned int nbytes;
1da177e4 2603
2e5704f6
TH		 2604 memset(qc->cdb, 0, dev->cdb_len);
2605 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2606
2607 qc->complete_fn = atapi_qc_complete;
2608
2609 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2610 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2611 qc->tf.flags |= ATA_TFLAG_WRITE;
2612 DPRINTK("direction: write\n");
2613 }
2614
2615 qc->tf.command = ATA_CMD_PACKET;
aacda375 2616 ata_qc_set_pc_nbytes(qc);
e00f1ff3
TH		 2617
2618 /* check whether ATAPI DMA is safe */
5895ef9a 2619 if (!nodata && !using_pio && atapi_check_dma(qc))
e00f1ff3 2620 using_pio = 1;
1da177e4 2621
e190222d
TH		 2622 /* Some controller variants snoop this value for Packet
2623 * transfers to do state machine and FIFO management. Thus we
2624 * want to set it properly, and for DMA where it is
2625 * effectively meaningless.
2626 */
aacda375 2627 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2db78dd3 2628
e190222d
TH		 2629 /* Most ATAPI devices which honor transfer chunk size don't
2630 * behave according to the spec when odd chunk size which
2631 * matches the transfer length is specified. If the number of
2632 * bytes to transfer is 2n+1. According to the spec, what
2633 * should happen is to indicate that 2n+1 is going to be
2634 * transferred and transfer 2n+2 bytes where the last byte is
2635 * padding.
2636 *
2637 * In practice, this doesn't happen. ATAPI devices first
2638 * indicate and transfer 2n bytes and then indicate and
2639 * transfer 2 bytes where the last byte is padding.
2640 *
2641 * This inconsistency confuses several controllers which
2642 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2643 * These controllers use actual number of transferred bytes to
2644 * update DMA poitner and transfer of 4n+2 bytes make those
2645 * controller push DMA pointer by 4n+4 bytes because SATA data
2646 * FISes are aligned to 4 bytes. This causes data corruption
2647 * and buffer overrun.
2648 *
2649 * Always setting nbytes to even number solves this problem
2650 * because then ATAPI devices don't have to split data at 2n
2651 * boundaries.
2652 */
2653 if (nbytes & 0x1)
2654 nbytes++;
2655
2db78dd3
AC		 2656 qc->tf.lbam = (nbytes & 0xFF);
2657 qc->tf.lbah = (nbytes >> 8);
2658
5895ef9a
TH		 2659 if (nodata)
2660 qc->tf.protocol = ATAPI_PROT_NODATA;
2661 else if (using_pio)
2662 qc->tf.protocol = ATAPI_PROT_PIO;
2663 else {
e00f1ff3 2664 /* DMA data xfer */
0dc36888 2665 qc->tf.protocol = ATAPI_PROT_DMA;
1da177e4
LT		 2666 qc->tf.feature |= ATAPI_PKT_DMA;
2667
91163006
TH		 2668 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2669 (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2670 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2671 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2672 }
2673
2db78dd3
AC		 2674
2675 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2676 as ATAPI tape drives don't get this right otherwise */
1da177e4
LT		 2677 return 0;
2678}
2679
2dcb407e 2680static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2681{
071f44b1 2682 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2683 if (likely(devno < ata_link_max_devices(&ap->link)))
2684 return &ap->link.device[devno];
2685 } else {
2686 if (likely(devno < ap->nr_pmp_links))
2687 return &ap->pmp_link[devno].device[0];
2688 }
2689
ab5b3a5b
TH		 2690 return NULL;
2691}
2692
2dcb407e
JG		 2693static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2694 const struct scsi_device *scsidev)
ab5b3a5b 2695{
41bda9c9
TH		 2696 int devno;
2697
ab5b3a5b 2698 /* skip commands not addressed to targets we simulate */
071f44b1 2699 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 2700 if (unlikely(scsidev->channel || scsidev->lun))
2701 return NULL;
2702 devno = scsidev->id;
2703 } else {
2704 if (unlikely(scsidev->id || scsidev->lun))
2705 return NULL;
2706 devno = scsidev->channel;
2707 }
ab5b3a5b 2708
41bda9c9 2709 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2710}
2711
1da177e4
LT		 2712/**
2713 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2714 * @ap: ATA port to which the device is attached
2715 * @scsidev: SCSI device from which we derive the ATA device
2716 *
2717 * Given various information provided in struct scsi_cmnd,
2718 * map that onto an ATA bus, and using that mapping
2719 * determine which ata_device is associated with the
2720 * SCSI command to be sent.
2721 *
2722 * LOCKING:
cca3974e 2723 * spin_lock_irqsave(host lock)
1da177e4
LT		 2724 *
2725 * RETURNS:
2726 * Associated ATA device, or %NULL if not found.
2727 */
1da177e4 2728static struct ata_device *
057ace5e 2729ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2730{
ab5b3a5b 2731 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2732
2486fa56 2733 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2734 return NULL;
2735
1da177e4
LT		 2736 return dev;
2737}
2738
b095518e
JG		 2739/*
2740 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2741 * @byte1: Byte 1 from pass-thru CDB.
2742 *
2743 * RETURNS:
2744 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2745 */
2746static u8
2747ata_scsi_map_proto(u8 byte1)
2748{
2749 switch((byte1 & 0x1e) >> 1) {
2dcb407e
JG		 2750 case 3: /* Non-data */
2751 return ATA_PROT_NODATA;
2752
2753 case 6: /* DMA */
2754 case 10: /* UDMA Data-in */
2755 case 11: /* UDMA Data-Out */
2756 return ATA_PROT_DMA;
2757
2758 case 4: /* PIO Data-in */
2759 case 5: /* PIO Data-out */
2760 return ATA_PROT_PIO;
2761
2762 case 0: /* Hard Reset */
2763 case 1: /* SRST */
2764 case 8: /* Device Diagnostic */
2765 case 9: /* Device Reset */
2766 case 7: /* DMA Queued */
2767 case 12: /* FPDMA */
2768 case 15: /* Return Response Info */
2769 default: /* Reserved */
2770 break;
b095518e
JG		 2771 }
2772
2773 return ATA_PROT_UNKNOWN;
2774}
2775
2776/**
2777 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2778 * @qc: command structure to be initialized
b095518e
JG		 2779 *
2780 * Handles either 12 or 16-byte versions of the CDB.
2781 *
2782 * RETURNS:
2783 * Zero on success, non-zero on failure.
2784 */
ad706991 2785static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2786{
2787 struct ata_taskfile *tf = &(qc->tf);
542b1444 2788 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2789 struct ata_device *dev = qc->dev;
ad706991 2790 const u8 *cdb = scmd->cmnd;
b095518e 2791
542b1444 2792 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2793 goto invalid_fld;
8190bdb9 2794
ae8d4ee7
AC		 2795 /*
2796 * Filter TPM commands by default. These provide an
2797 * essentially uncontrolled encrypted "back door" between
2798 * applications and the disk. Set libata.allow_tpm=1 if you
2799 * have a real reason for wanting to use them. This ensures
2800 * that installed software cannot easily mess stuff up without
2801 * user intent. DVR type users will probably ship with this enabled
2802 * for movie content management.
2803 *
2804 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2805 * for this and should do in future but that it is not sufficient as
2806 * DCS is an optional feature set. Thus we also do the software filter
2807 * so that we comply with the TC consortium stated goal that the user
2808 * can turn off TC features of their system.
2809 */
2810 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2811 goto invalid_fld;
2812
f79d409f
AC		 2813 /* We may not issue DMA commands if no DMA mode is set */
2814 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2815 goto invalid_fld;
b095518e
JG		 2816
2817 /*
2818 * 12 and 16 byte CDBs use different offsets to
2819 * provide the various register values.
2820 */
542b1444 2821 if (cdb[0] == ATA_16) {
b095518e
JG		 2822 /*
2823 * 16-byte CDB - may contain extended commands.
2824 *
2825 * If that is the case, copy the upper byte register values.
2826 */
542b1444
TH		 2827 if (cdb[1] & 0x01) {
2828 tf->hob_feature = cdb[3];
2829 tf->hob_nsect = cdb[5];
2830 tf->hob_lbal = cdb[7];
2831 tf->hob_lbam = cdb[9];
2832 tf->hob_lbah = cdb[11];
b095518e
JG		 2833 tf->flags |= ATA_TFLAG_LBA48;
2834 } else
2835 tf->flags &= ~ATA_TFLAG_LBA48;
2836
2837 /*
2838 * Always copy low byte, device and command registers.
2839 */
542b1444
TH		 2840 tf->feature = cdb[4];
2841 tf->nsect = cdb[6];
2842 tf->lbal = cdb[8];
2843 tf->lbam = cdb[10];
2844 tf->lbah = cdb[12];
2845 tf->device = cdb[13];
2846 tf->command = cdb[14];
b095518e
JG		 2847 } else {
2848 /*
2849 * 12-byte CDB - incapable of extended commands.
2850 */
2851 tf->flags &= ~ATA_TFLAG_LBA48;
2852
542b1444
TH		 2853 tf->feature = cdb[3];
2854 tf->nsect = cdb[4];
2855 tf->lbal = cdb[5];
2856 tf->lbam = cdb[6];
2857 tf->lbah = cdb[7];
2858 tf->device = cdb[8];
2859 tf->command = cdb[9];
b095518e 2860 }
fa4453c4
AL		 2861
2862 /* enforce correct master/slave bit */
2863 tf->device = dev->devno ?
2864 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2865
1dce589c
AL		 2866 /* sanity check for pio multi commands */
2867 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2868 goto invalid_fld;
2869
2870 if (is_multi_taskfile(tf)) {
2871 unsigned int multi_count = 1 << (cdb[1] >> 5);
2872
2873 /* compare the passed through multi_count
2874 * with the cached multi_count of libata
2875 */
2876 if (multi_count != dev->multi_count)
2877 ata_dev_printk(dev, KERN_WARNING,
2878 "invalid multi_count %u ignored\n",
2879 multi_count);
d26fc955 2880 }
1dce589c 2881
5a5dbd18
ML		 2882 /* READ/WRITE LONG use a non-standard sect_size */
2883 qc->sect_size = ATA_SECT_SIZE;
2884 switch (tf->command) {
2885 case ATA_CMD_READ_LONG:
2886 case ATA_CMD_READ_LONG_ONCE:
2887 case ATA_CMD_WRITE_LONG:
2888 case ATA_CMD_WRITE_LONG_ONCE:
2889 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2890 goto invalid_fld;
7120165c 2891 qc->sect_size = scsi_bufflen(scmd);
5a5dbd18
ML		 2892 }
2893
b095518e
JG		 2894 /*
2895 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2896 * SET_FEATURES - XFER MODE must be preceded/succeeded
2897 * by an update to hardware-specific registers for each
2898 * controller (i.e. the reason for ->set_piomode(),
2899 * ->set_dmamode(), and ->post_set_mode() hooks).
2900 */
2901 if ((tf->command == ATA_CMD_SET_FEATURES)
2902 && (tf->feature == SETFEATURES_XFER))
9a405257 2903 goto invalid_fld;
b095518e
JG		 2904
2905 /*
2906 * Set flags so that all registers will be written,
2907 * and pass on write indication (used for PIO/DMA
2908 * setup.)
2909 */
2910 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2911
542b1444 2912 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2913 tf->flags |= ATA_TFLAG_WRITE;
2914
2915 /*
2916 * Set transfer length.
2917 *
2918 * TODO: find out if we need to do more here to
2919 * cover scatter/gather case.
2920 */
aacda375 2921 ata_qc_set_pc_nbytes(qc);
b095518e 2922
e027bd36
TH		 2923 /* request result TF and be quiet about device error */
2924 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
e61e0672 2925
b095518e 2926 return 0;
9a405257
TH		 2927
2928 invalid_fld:
542b1444 2929 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2930 /* "Invalid field in cdb" */
2931 return 1;
b095518e
JG		 2932}
2933
1da177e4
LT		 2934/**
2935 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2936 * @dev: ATA device
2937 * @cmd: SCSI command opcode to consider
2938 *
2939 * Look up the SCSI command given, and determine whether the
2940 * SCSI command is to be translated or simulated.
2941 *
2942 * RETURNS:
2943 * Pointer to translation function if possible, %NULL if not.
2944 */
2945
2946static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2947{
2948 switch (cmd) {
2949 case READ_6:
2950 case READ_10:
2951 case READ_16:
2952
2953 case WRITE_6:
2954 case WRITE_10:
2955 case WRITE_16:
2956 return ata_scsi_rw_xlat;
2957
2958 case SYNCHRONIZE_CACHE:
2959 if (ata_try_flush_cache(dev))
2960 return ata_scsi_flush_xlat;
2961 break;
2962
2963 case VERIFY:
2964 case VERIFY_16:
2965 return ata_scsi_verify_xlat;
b095518e
JG		 2966
2967 case ATA_12:
2968 case ATA_16:
2969 return ata_scsi_pass_thru;
da61396d 2970
972dcafb
DG		 2971 case START_STOP:
2972 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2973 }
2974
2975 return NULL;
2976}
2977
2978/**
2979 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2980 * @ap: ATA port to which the command was being sent
2981 * @cmd: SCSI command to dump
2982 *
2983 * Prints the contents of a SCSI command via printk().
2984 */
2985
2986static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2987 struct scsi_cmnd *cmd)
2988{
2989#ifdef ATA_DEBUG
2990 struct scsi_device *scsidev = cmd->device;
2991 u8 *scsicmd = cmd->cmnd;
2992
2993 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2994 ap->print_id,
1da177e4
LT		 2995 scsidev->channel, scsidev->id, scsidev->lun,
2996 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2997 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2998 scsicmd[8]);
2999#endif
3000}
3001
542b1444 3002static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 3003 void (*done)(struct scsi_cmnd *),
3004 struct ata_device *dev)
eb3f0f9c 3005{
baf4fdfa
ML		 3006 u8 scsi_op = scmd->cmnd[0];
3007 ata_xlat_func_t xlat_func;
2115ea94
TH		 3008 int rc = 0;
3009
eb3f0f9c 3010 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 3011 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3012 goto bad_cdb_len;
eb3f0f9c 3013
baf4fdfa
ML		 3014 xlat_func = ata_get_xlat_func(dev, scsi_op);
3015 } else {
3016 if (unlikely(!scmd->cmd_len))
3017 goto bad_cdb_len;
3018
3019 xlat_func = NULL;
3020 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3021 /* relay SCSI command to ATAPI device */
607126c2
ML		 3022 int len = COMMAND_SIZE(scsi_op);
3023 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
baf4fdfa
ML		 3024 goto bad_cdb_len;
3025
3026 xlat_func = atapi_xlat;
3027 } else {
3028 /* ATA_16 passthru, treat as an ATA command */
3029 if (unlikely(scmd->cmd_len > 16))
3030 goto bad_cdb_len;
3031
3032 xlat_func = ata_get_xlat_func(dev, scsi_op);
3033 }
3034 }
3035
3036 if (xlat_func)
3037 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3038 else
3039 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 3040
3041 return rc;
baf4fdfa
ML		 3042
3043 bad_cdb_len:
3044 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3045 scmd->cmd_len, scsi_op, dev->cdb_len);
3046 scmd->result = DID_ERROR << 16;
3047 done(scmd);
3048 return 0;
eb3f0f9c
BK		 3049}
3050
1da177e4
LT		 3051/**
3052 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3053 * @cmd: SCSI command to be sent
3054 * @done: Completion function, called when command is complete
3055 *
3056 * In some cases, this function translates SCSI commands into
3057 * ATA taskfiles, and queues the taskfiles to be sent to
3058 * hardware. In other cases, this function simulates a
3059 * SCSI device by evaluating and responding to certain
3060 * SCSI commands. This creates the overall effect of
3061 * ATA and ATAPI devices appearing as SCSI devices.
3062 *
3063 * LOCKING:
cca3974e 3064 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 3065 *
3066 * RETURNS:
2115ea94
TH		 3067 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3068 * 0 otherwise.
1da177e4 3069 */
1da177e4
LT		 3070int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3071{
3072 struct ata_port *ap;
3073 struct ata_device *dev;
3074 struct scsi_device *scsidev = cmd->device;
005a5a06 3075 struct Scsi_Host *shost = scsidev->host;
2115ea94 3076 int rc = 0;
1da177e4 3077
35bb94b1 3078 ap = ata_shost_to_port(shost);
005a5a06
JG		 3079
3080 spin_unlock(shost->host_lock);
ba6a1308 3081 spin_lock(ap->lock);
1da177e4
LT		 3082
3083 ata_scsi_dump_cdb(ap, cmd);
3084
3085 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 3086 if (likely(dev))
2115ea94 3087 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 3088 else {
1da177e4
LT		 3089 cmd->result = (DID_BAD_TARGET << 16);
3090 done(cmd);
1da177e4
LT		 3091 }
3092
ba6a1308 3093 spin_unlock(ap->lock);
005a5a06 3094 spin_lock(shost->host_lock);
2115ea94 3095 return rc;
1da177e4
LT		 3096}
3097
3098/**
3099 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 3100 * @dev: the target device
1da177e4
LT		 3101 * @cmd: SCSI command being sent to device.
3102 * @done: SCSI command completion function.
3103 *
3104 * Interprets and directly executes a select list of SCSI commands
3105 * that can be handled internally.
3106 *
3107 * LOCKING:
cca3974e 3108 * spin_lock_irqsave(host lock)
1da177e4
LT		 3109 */
3110
3373efd8 3111void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 3112 void (*done)(struct scsi_cmnd *))
3113{
3114 struct ata_scsi_args args;
057ace5e 3115 const u8 *scsicmd = cmd->cmnd;
45394145 3116 u8 tmp8;
1da177e4 3117
9a3dccc4
TH		 3118 args.dev = dev;
3119 args.id = dev->id;
1da177e4
LT		 3120 args.cmd = cmd;
3121 args.done = done;
3122
3123 switch(scsicmd[0]) {
2dcb407e
JG		 3124 /* TODO: worth improving? */
3125 case FORMAT_UNIT:
3126 ata_scsi_invalid_field(cmd, done);
3127 break;
3128
3129 case INQUIRY:
3130 if (scsicmd[1] & 2) /* is CmdDt set? */
00bd0202 3131 ata_scsi_invalid_field(cmd, done);
2dcb407e
JG		 3132 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3133 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3134 else switch (scsicmd[2]) {
3135 case 0x00:
3136 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1da177e4 3137 break;
2dcb407e
JG		 3138 case 0x80:
3139 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1da177e4 3140 break;
2dcb407e
JG		 3141 case 0x83:
3142 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1da177e4 3143 break;
2dcb407e
JG		 3144 case 0x89:
3145 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3146 break;
1e9dbc92
MW		 3147 case 0xb1:
3148 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3149 break;
2dcb407e 3150 default:
ae006510 3151 ata_scsi_invalid_field(cmd, done);
1da177e4 3152 break;
2dcb407e
JG		 3153 }
3154 break;
3155
3156 case MODE_SENSE:
3157 case MODE_SENSE_10:
3158 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3159 break;
3160
3161 case MODE_SELECT: /* unconditionally return */
3162 case MODE_SELECT_10: /* bad-field-in-cdb */
3163 ata_scsi_invalid_field(cmd, done);
3164 break;
1da177e4 3165
2dcb407e
JG		 3166 case READ_CAPACITY:
3167 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3168 break;
3169
3170 case SERVICE_ACTION_IN:
3171 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1da177e4 3172 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2dcb407e
JG		 3173 else
3174 ata_scsi_invalid_field(cmd, done);
3175 break;
1da177e4 3176
2dcb407e
JG		 3177 case REPORT_LUNS:
3178 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3179 break;
1da177e4 3180
2dcb407e
JG		 3181 case REQUEST_SENSE:
3182 ata_scsi_set_sense(cmd, 0, 0, 0);
3183 cmd->result = (DRIVER_SENSE << 24);
3184 done(cmd);
3185 break;
1da177e4 3186
2dcb407e
JG		 3187 /* if we reach this, then writeback caching is disabled,
3188 * turning this into a no-op.
3189 */
3190 case SYNCHRONIZE_CACHE:
3191 /* fall through */
3192
3193 /* no-op's, complete with success */
3194 case REZERO_UNIT:
3195 case SEEK_6:
3196 case SEEK_10:
3197 case TEST_UNIT_READY:
3198 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3199 break;
45394145 3200
2dcb407e
JG		 3201 case SEND_DIAGNOSTIC:
3202 tmp8 = scsicmd[1] & ~(1 << 3);
3203 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
00bd0202 3204 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2dcb407e
JG		 3205 else
3206 ata_scsi_invalid_field(cmd, done);
3207 break;
1da177e4 3208
2dcb407e
JG		 3209 /* all other commands */
3210 default:
3211 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3212 /* "Invalid command operation code" */
3213 done(cmd);
3214 break;
1da177e4
LT		 3215 }
3216}
3217
f3187195
TH		 3218int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3219{
3220 int i, rc;
3221
3222 for (i = 0; i < host->n_ports; i++) {
3223 struct ata_port *ap = host->ports[i];
3224 struct Scsi_Host *shost;
3225
3226 rc = -ENOMEM;
3227 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3228 if (!shost)
3229 goto err_alloc;
3230
3231 *(struct ata_port **)&shost->hostdata[0] = ap;
3232 ap->scsi_host = shost;
3233
3234 shost->transportt = &ata_scsi_transport_template;
3235 shost->unique_id = ap->print_id;
3236 shost->max_id = 16;
3237 shost->max_lun = 1;
3238 shost->max_channel = 1;
3239 shost->max_cmd_len = 16;
3240
31cc23b3
TH		 3241 /* Schedule policy is determined by ->qc_defer()
3242 * callback and it needs to see every deferred qc.
3243 * Set host_blocked to 1 to prevent SCSI midlayer from
3244 * automatically deferring requests.
3245 */
3246 shost->max_host_blocked = 1;
3247
f3187195
TH		 3248 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3249 if (rc)
3250 goto err_add;
3251 }
3252
3253 return 0;
3254
3255 err_add:
3256 scsi_host_put(host->ports[i]->scsi_host);
3257 err_alloc:
3258 while (--i >= 0) {
3259 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3260
3261 scsi_remove_host(shost);
3262 scsi_host_put(shost);
3263 }
3264 return rc;
3265}
3266
1ae46317 3267void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3268{
1ae46317
TH		 3269 int tries = 5;
3270 struct ata_device *last_failed_dev = NULL;
41bda9c9 3271 struct ata_link *link;
1ae46317 3272 struct ata_device *dev;
644dd0cc 3273
198e0fed 3274 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 3275 return;
3276
1ae46317 3277 repeat:
1eca4365
TH		 3278 ata_for_each_link(link, ap, EDGE) {
3279 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9
TH		 3280 struct scsi_device *sdev;
3281 int channel = 0, id = 0;
3edebac4 3282
1eca4365 3283 if (dev->sdev)
41bda9c9 3284 continue;
3f19ee8c 3285
41bda9c9
TH		 3286 if (ata_is_host_link(link))
3287 id = dev->devno;
3288 else
3289 channel = link->pmp;
3290
3291 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3292 NULL);
3293 if (!IS_ERR(sdev)) {
3294 dev->sdev = sdev;
3295 scsi_device_put(sdev);
3296 }
3edebac4 3297 }
3f19ee8c 3298 }
1ae46317
TH		 3299
3300 /* If we scanned while EH was in progress or allocation
3301 * failure occurred, scan would have failed silently. Check
3302 * whether all devices are attached.
3303 */
1eca4365
TH		 3304 ata_for_each_link(link, ap, EDGE) {
3305 ata_for_each_dev(dev, link, ENABLED) {
3306 if (!dev->sdev)
41bda9c9
TH		 3307 goto exit_loop;
3308 }
1ae46317 3309 }
41bda9c9
TH		 3310 exit_loop:
3311 if (!link)
1ae46317
TH		 3312 return;
3313
3314 /* we're missing some SCSI devices */
3315 if (sync) {
3316 /* If caller requested synchrnous scan && we've made
3317 * any progress, sleep briefly and repeat.
3318 */
3319 if (dev != last_failed_dev) {
3320 msleep(100);
3321 last_failed_dev = dev;
3322 goto repeat;
3323 }
3324
3325 /* We might be failing to detect boot device, give it
3326 * a few more chances.
3327 */
3328 if (--tries) {
3329 msleep(100);
3330 goto repeat;
3331 }
3332
3333 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3334 "failed without making any progress,\n"
3335 " switching to async\n");
3336 }
3337
3338 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3339 round_jiffies_relative(HZ));
644dd0cc 3340}
0ea035a3
TH		 3341
3342/**
3343 * ata_scsi_offline_dev - offline attached SCSI device
3344 * @dev: ATA device to offline attached SCSI device for
3345 *
3346 * This function is called from ata_eh_hotplug() and responsible
3347 * for taking the SCSI device attached to @dev offline. This
cca3974e 3348 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3349 * against clearing.
3350 *
3351 * LOCKING:
cca3974e 3352 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3353 *
3354 * RETURNS:
3355 * 1 if attached SCSI device exists, 0 otherwise.
3356 */
3357int ata_scsi_offline_dev(struct ata_device *dev)
3358{
3359 if (dev->sdev) {
3360 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3361 return 1;
3362 }
3363 return 0;
3364}
580b2102
TH		 3365
3366/**
3367 * ata_scsi_remove_dev - remove attached SCSI device
3368 * @dev: ATA device to remove attached SCSI device for
3369 *
3370 * This function is called from ata_eh_scsi_hotplug() and
3371 * responsible for removing the SCSI device attached to @dev.
3372 *
3373 * LOCKING:
3374 * Kernel thread context (may sleep).
3375 */
3376static void ata_scsi_remove_dev(struct ata_device *dev)
3377{
9af5c9c9 3378 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3379 struct scsi_device *sdev;
3380 unsigned long flags;
3381
3382 /* Alas, we need to grab scan_mutex to ensure SCSI device
3383 * state doesn't change underneath us and thus
3384 * scsi_device_get() always succeeds. The mutex locking can
3385 * be removed if there is __scsi_device_get() interface which
3386 * increments reference counts regardless of device state.
3387 */
cca3974e 3388 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3389 spin_lock_irqsave(ap->lock, flags);
580b2102 3390
cca3974e 3391 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3392 sdev = dev->sdev;
3393 dev->sdev = NULL;
3394
3395 if (sdev) {
3396 /* If user initiated unplug races with us, sdev can go
cca3974e 3397 * away underneath us after the host lock and
580b2102
TH		 3398 * scan_mutex are released. Hold onto it.
3399 */
3400 if (scsi_device_get(sdev) == 0) {
3401 /* The following ensures the attached sdev is
3402 * offline on return from ata_scsi_offline_dev()
3403 * regardless it wins or loses the race
3404 * against this function.
3405 */
3406 scsi_device_set_state(sdev, SDEV_OFFLINE);
3407 } else {
3408 WARN_ON(1);
3409 sdev = NULL;
3410 }
3411 }
3412
ba6a1308 3413 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3414 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3415
3416 if (sdev) {
3417 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
b9d5fc41 3418 dev_name(&sdev->sdev_gendev));
580b2102
TH		 3419
3420 scsi_remove_device(sdev);
3421 scsi_device_put(sdev);
3422 }
3423}
3424
41bda9c9
TH		 3425static void ata_scsi_handle_link_detach(struct ata_link *link)
3426{
3427 struct ata_port *ap = link->ap;
3428 struct ata_device *dev;
3429
1eca4365 3430 ata_for_each_dev(dev, link, ALL) {
41bda9c9
TH		 3431 unsigned long flags;
3432
3433 if (!(dev->flags & ATA_DFLAG_DETACHED))
3434 continue;
3435
3436 spin_lock_irqsave(ap->lock, flags);
3437 dev->flags &= ~ATA_DFLAG_DETACHED;
3438 spin_unlock_irqrestore(ap->lock, flags);
3439
3440 ata_scsi_remove_dev(dev);
3441 }
3442}
3443
2f294968
KCA		 3444/**
3445 * ata_scsi_media_change_notify - send media change event
c5d0e6a0 3446 * @dev: Pointer to the disk device with media change event
2f294968
KCA		 3447 *
3448 * Tell the block layer to send a media change notification
3449 * event.
3450 *
3451 * LOCKING:
854c73a2 3452 * spin_lock_irqsave(host lock)
2f294968 3453 */
854c73a2 3454void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968 3455{
854c73a2 3456 if (dev->sdev)
f26792d5
JG		 3457 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3458 GFP_ATOMIC);
2f294968 3459}
2f294968 3460
580b2102
TH		 3461/**
3462 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3463 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3464 *
3465 * Perform SCSI part of hotplug. It's executed from a separate
3466 * workqueue after EH completes. This is necessary because SCSI
3467 * hot plugging requires working EH and hot unplugging is
3468 * synchronized with hot plugging with a mutex.
3469 *
3470 * LOCKING:
3471 * Kernel thread context (may sleep).
3472 */
65f27f38 3473void ata_scsi_hotplug(struct work_struct *work)
580b2102 3474{
65f27f38
DH		 3475 struct ata_port *ap =
3476 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3477 int i;
580b2102 3478
b51e9e5d 3479 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3480 DPRINTK("ENTER/EXIT - unloading\n");
3481 return;
3482 }
3483
3484 DPRINTK("ENTER\n");
3485
41bda9c9
TH		 3486 /* Unplug detached devices. We cannot use link iterator here
3487 * because PMP links have to be scanned even if PMP is
3488 * currently not attached. Iterate manually.
3489 */
3490 ata_scsi_handle_link_detach(&ap->link);
3491 if (ap->pmp_link)
3492 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3493 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3494
3495 /* scan for new ones */
1ae46317 3496 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3497
3498 DPRINTK("EXIT\n");
3499}
83c47bcb
TH		 3500
3501/**
3502 * ata_scsi_user_scan - indication for user-initiated bus scan
3503 * @shost: SCSI host to scan
3504 * @channel: Channel to scan
3505 * @id: ID to scan
3506 * @lun: LUN to scan
3507 *
3508 * This function is called when user explicitly requests bus
3509 * scan. Set probe pending flag and invoke EH.
3510 *
3511 * LOCKING:
3512 * SCSI layer (we don't care)
3513 *
3514 * RETURNS:
3515 * Zero.
3516 */
3517static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3518 unsigned int id, unsigned int lun)
3519{
3520 struct ata_port *ap = ata_shost_to_port(shost);
3521 unsigned long flags;
41bda9c9 3522 int devno, rc = 0;
83c47bcb
TH		 3523
3524 if (!ap->ops->error_handler)
3525 return -EOPNOTSUPP;
3526
41bda9c9 3527 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3528 return -EINVAL;
3529
071f44b1 3530 if (!sata_pmp_attached(ap)) {
41bda9c9
TH		 3531 if (channel != SCAN_WILD_CARD && channel)
3532 return -EINVAL;
3533 devno = id;
3534 } else {
3535 if (id != SCAN_WILD_CARD && id)
3536 return -EINVAL;
3537 devno = channel;
3538 }
3539
ba6a1308 3540 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3541
41bda9c9
TH		 3542 if (devno == SCAN_WILD_CARD) {
3543 struct ata_link *link;
3544
1eca4365 3545 ata_for_each_link(link, ap, EDGE) {
41bda9c9 3546 struct ata_eh_info *ehi = &link->eh_info;
b558eddd 3547 ehi->probe_mask |= ATA_ALL_DEVICES;
cf480626 3548 ehi->action |= ATA_EH_RESET;
41bda9c9 3549 }
83c47bcb 3550 } else {
41bda9c9 3551 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3552
3553 if (dev) {
41bda9c9 3554 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9 3555 ehi->probe_mask |= 1 << dev->devno;
cf480626 3556 ehi->action |= ATA_EH_RESET;
83c47bcb
TH		 3557 } else
3558 rc = -EINVAL;
3559 }
3560
309afcb5 3561 if (rc == 0) {
83c47bcb 3562 ata_port_schedule_eh(ap);
309afcb5
TH		 3563 spin_unlock_irqrestore(ap->lock, flags);
3564 ata_port_wait_eh(ap);
3565 } else
3566 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3567
3568 return rc;
3569}
3057ac3c 3570
3571/**
d0171269 3572 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3573 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3574 *
d0171269
TH		 3575 * After ATA pass thru (SAT) commands are executed successfully,
3576 * libata need to propagate the changes to SCSI layer. This
3577 * function must be executed from ata_aux_wq such that sdev
3578 * attach/detach don't race with rescan.
3057ac3c 3579 *
d0171269
TH		 3580 * LOCKING:
3581 * Kernel thread context (may sleep).
3057ac3c 3582 */
65f27f38 3583void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3584{
65f27f38
DH		 3585 struct ata_port *ap =
3586 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3587 struct ata_link *link;
f58229f8 3588 struct ata_device *dev;
f84e7e41 3589 unsigned long flags;
3057ac3c 3590
f84e7e41
TH		 3591 spin_lock_irqsave(ap->lock, flags);
3592
1eca4365
TH		 3593 ata_for_each_link(link, ap, EDGE) {
3594 ata_for_each_dev(dev, link, ENABLED) {
41bda9c9 3595 struct scsi_device *sdev = dev->sdev;
3057ac3c 3596
1eca4365 3597 if (!sdev)
41bda9c9
TH		 3598 continue;
3599 if (scsi_device_get(sdev))
3600 continue;
f84e7e41 3601
41bda9c9
TH		 3602 spin_unlock_irqrestore(ap->lock, flags);
3603 scsi_rescan_device(&(sdev->sdev_gendev));
3604 scsi_device_put(sdev);
3605 spin_lock_irqsave(ap->lock, flags);
3606 }
3057ac3c 3607 }
f84e7e41
TH		 3608
3609 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3610}
80289167
BK		 3611
3612/**
3613 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3614 * @host: ATA host container for all SAS ports
80289167 3615 * @port_info: Information from low-level host driver
cca3974e 3616 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3617 *
3618 * LOCKING:
3619 * PCI/etc. bus probe sem.
3620 *
3621 * RETURNS:
3622 * ata_port pointer on success / NULL on failure.
3623 */
3624
cca3974e 3625struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3626 struct ata_port_info *port_info,
cca3974e 3627 struct Scsi_Host *shost)
80289167 3628{
f3187195 3629 struct ata_port *ap;
80289167 3630
f3187195 3631 ap = ata_port_alloc(host);
80289167
BK		 3632 if (!ap)
3633 return NULL;
3634
f3187195 3635 ap->port_no = 0;
cca3974e 3636 ap->lock = shost->host_lock;
f3187195
TH		 3637 ap->pio_mask = port_info->pio_mask;
3638 ap->mwdma_mask = port_info->mwdma_mask;
3639 ap->udma_mask = port_info->udma_mask;
3640 ap->flags |= port_info->flags;
3641 ap->ops = port_info->port_ops;
3642 ap->cbl = ATA_CBL_SATA;
3643
80289167
BK		 3644 return ap;
3645}
3646EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3647
3648/**
3649 * ata_sas_port_start - Set port up for dma.
3650 * @ap: Port to initialize
3651 *
3652 * Called just after data structures for each port are
dde20207 3653 * initialized.
80289167
BK		 3654 *
3655 * May be used as the port_start() entry in ata_port_operations.
3656 *
3657 * LOCKING:
3658 * Inherited from caller.
3659 */
3660int ata_sas_port_start(struct ata_port *ap)
3661{
dde20207 3662 return 0;
80289167
BK		 3663}
3664EXPORT_SYMBOL_GPL(ata_sas_port_start);
3665
3666/**
3667 * ata_port_stop - Undo ata_sas_port_start()
3668 * @ap: Port to shut down
3669 *
80289167
BK		 3670 * May be used as the port_stop() entry in ata_port_operations.
3671 *
3672 * LOCKING:
3673 * Inherited from caller.
3674 */
3675
3676void ata_sas_port_stop(struct ata_port *ap)
3677{
80289167
BK		 3678}
3679EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3680
3681/**
3682 * ata_sas_port_init - Initialize a SATA device
3683 * @ap: SATA port to initialize
3684 *
3685 * LOCKING:
3686 * PCI/etc. bus probe sem.
3687 *
3688 * RETURNS:
3689 * Zero on success, non-zero on error.
3690 */
3691
3692int ata_sas_port_init(struct ata_port *ap)
3693{
3694 int rc = ap->ops->port_start(ap);
3695
f3187195
TH		 3696 if (!rc) {
3697 ap->print_id = ata_print_id++;
80289167 3698 rc = ata_bus_probe(ap);
f3187195 3699 }
80289167
BK		 3700
3701 return rc;
3702}
3703EXPORT_SYMBOL_GPL(ata_sas_port_init);
3704
3705/**
3706 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3707 * @ap: SATA port to destroy
3708 *
3709 */
3710
3711void ata_sas_port_destroy(struct ata_port *ap)
3712{
f0d36efd
TH		 3713 if (ap->ops->port_stop)
3714 ap->ops->port_stop(ap);
80289167
BK		 3715 kfree(ap);
3716}
3717EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3718
3719/**
3720 * ata_sas_slave_configure - Default slave_config routine for libata devices
3721 * @sdev: SCSI device to configure
3722 * @ap: ATA port to which SCSI device is attached
3723 *
3724 * RETURNS:
3725 * Zero.
3726 */
3727
3728int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3729{
3730 ata_scsi_sdev_config(sdev);
9af5c9c9 3731 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3732 return 0;
3733}
3734EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3735
3736/**
3737 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3738 * @cmd: SCSI command to be sent
3739 * @done: Completion function, called when command is complete
3740 * @ap: ATA port to which the command is being sent
3741 *
3742 * RETURNS:
08475a19
BK		 3743 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3744 * 0 otherwise.
80289167
BK		 3745 */
3746
3747int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3748 struct ata_port *ap)
3749{
08475a19
BK		 3750 int rc = 0;
3751
80289167
BK		 3752 ata_scsi_dump_cdb(ap, cmd);
3753
2486fa56 3754 if (likely(ata_dev_enabled(ap->link.device)))
9af5c9c9 3755 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3756 else {
3757 cmd->result = (DID_BAD_TARGET << 16);
3758 done(cmd);
3759 }
08475a19 3760 return rc;
80289167
BK		 3761}
3762EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
kernel source for telekom puls (alcatel/mediatek)