Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | #include <linux/kernel.h> |
38 | #include <linux/blkdev.h> | |
39 | #include <linux/spinlock.h> | |
40 | #include <scsi/scsi.h> | |
1da177e4 | 41 | #include <scsi/scsi_host.h> |
beb40487 | 42 | #include <scsi/scsi_cmnd.h> |
85837ebd | 43 | #include <scsi/scsi_eh.h> |
005a5a06 | 44 | #include <scsi/scsi_device.h> |
a6e6ce8e | 45 | #include <scsi/scsi_tcq.h> |
30afc84c | 46 | #include <scsi/scsi_transport.h> |
1da177e4 | 47 | #include <linux/libata.h> |
b095518e | 48 | #include <linux/hdreg.h> |
2dcb407e | 49 | #include <linux/uaccess.h> |
2a6e58d2 | 50 | #include <linux/suspend.h> |
18f0f978 | 51 | #include <asm/unaligned.h> |
1da177e4 LT |
52 | |
53 | #include "libata.h" | |
54 | ||
87340e98 TH |
55 | #define SECTOR_SIZE 512 |
56 | #define ATA_SCSI_RBUF_SIZE 4096 | |
57 | ||
58 | static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); | |
59 | static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; | |
b095518e | 60 | |
ad706991 | 61 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); |
ab5b3a5b | 62 | |
2dcb407e | 63 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 64 | const struct scsi_device *scsidev); |
2dcb407e | 65 | static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 66 | const struct scsi_device *scsidev); |
83c47bcb TH |
67 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
68 | unsigned int id, unsigned int lun); | |
ab5b3a5b | 69 | |
1da177e4 | 70 | |
00ac37f5 DG |
71 | #define RW_RECOVERY_MPAGE 0x1 |
72 | #define RW_RECOVERY_MPAGE_LEN 12 | |
73 | #define CACHE_MPAGE 0x8 | |
74 | #define CACHE_MPAGE_LEN 20 | |
75 | #define CONTROL_MPAGE 0xa | |
76 | #define CONTROL_MPAGE_LEN 12 | |
77 | #define ALL_MPAGES 0x3f | |
78 | #define ALL_SUB_MPAGES 0xff | |
79 | ||
80 | ||
24f75686 | 81 | static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { |
00ac37f5 DG |
82 | RW_RECOVERY_MPAGE, |
83 | RW_RECOVERY_MPAGE_LEN - 2, | |
24f75686 | 84 | (1 << 7), /* AWRE */ |
00ac37f5 DG |
85 | 0, /* read retry count */ |
86 | 0, 0, 0, 0, | |
87 | 0, /* write retry count */ | |
88 | 0, 0, 0 | |
89 | }; | |
90 | ||
91 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
92 | CACHE_MPAGE, | |
93 | CACHE_MPAGE_LEN - 2, | |
94 | 0, /* contains WCE, needs to be 0 for logic */ | |
95 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
96 | 0, /* contains DRA, needs to be 0 for logic */ | |
97 | 0, 0, 0, 0, 0, 0, 0 | |
98 | }; | |
99 | ||
100 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
101 | CONTROL_MPAGE, | |
102 | CONTROL_MPAGE_LEN - 2, | |
103 | 2, /* DSENSE=0, GLTSD=1 */ | |
104 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
105 | 0, 0, 0, 0, 0xff, 0xff, | |
106 | 0, 30 /* extended self test time, see 05-359r1 */ | |
107 | }; | |
108 | ||
30afc84c TH |
109 | /* |
110 | * libata transport template. libata doesn't do real transport stuff. | |
111 | * It just needs the eh_timed_out hook. | |
112 | */ | |
f3187195 | 113 | static struct scsi_transport_template ata_scsi_transport_template = { |
9227c33d | 114 | .eh_strategy_handler = ata_scsi_error, |
30afc84c | 115 | .eh_timed_out = ata_scsi_timed_out, |
ccf68c34 | 116 | .user_scan = ata_scsi_user_scan, |
30afc84c TH |
117 | }; |
118 | ||
1da177e4 | 119 | |
ca77329f KCA |
120 | static const struct { |
121 | enum link_pm value; | |
122 | const char *name; | |
123 | } link_pm_policy[] = { | |
124 | { NOT_AVAILABLE, "max_performance" }, | |
125 | { MIN_POWER, "min_power" }, | |
126 | { MAX_PERFORMANCE, "max_performance" }, | |
127 | { MEDIUM_POWER, "medium_power" }, | |
128 | }; | |
129 | ||
a2d6ed14 | 130 | static const char *ata_scsi_lpm_get(enum link_pm policy) |
ca77329f KCA |
131 | { |
132 | int i; | |
133 | ||
134 | for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++) | |
135 | if (link_pm_policy[i].value == policy) | |
136 | return link_pm_policy[i].name; | |
137 | ||
138 | return NULL; | |
139 | } | |
140 | ||
ee959b00 TJ |
141 | static ssize_t ata_scsi_lpm_put(struct device *dev, |
142 | struct device_attribute *attr, | |
143 | const char *buf, size_t count) | |
ca77329f | 144 | { |
ee959b00 | 145 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
146 | struct ata_port *ap = ata_shost_to_port(shost); |
147 | enum link_pm policy = 0; | |
148 | int i; | |
149 | ||
150 | /* | |
151 | * we are skipping array location 0 on purpose - this | |
152 | * is because a value of NOT_AVAILABLE is displayed | |
153 | * to the user as max_performance, but when the user | |
154 | * writes "max_performance", they actually want the | |
155 | * value to match MAX_PERFORMANCE. | |
156 | */ | |
157 | for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) { | |
158 | const int len = strlen(link_pm_policy[i].name); | |
6a744637 | 159 | if (strncmp(link_pm_policy[i].name, buf, len) == 0) { |
ca77329f KCA |
160 | policy = link_pm_policy[i].value; |
161 | break; | |
162 | } | |
163 | } | |
164 | if (!policy) | |
165 | return -EINVAL; | |
166 | ||
167 | ata_lpm_schedule(ap, policy); | |
168 | return count; | |
169 | } | |
170 | ||
171 | static ssize_t | |
ee959b00 | 172 | ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf) |
ca77329f | 173 | { |
ee959b00 | 174 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
175 | struct ata_port *ap = ata_shost_to_port(shost); |
176 | const char *policy = | |
177 | ata_scsi_lpm_get(ap->pm_policy); | |
178 | ||
179 | if (!policy) | |
180 | return -EINVAL; | |
181 | ||
182 | return snprintf(buf, 23, "%s\n", policy); | |
183 | } | |
ee959b00 | 184 | DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, |
ca77329f | 185 | ata_scsi_lpm_show, ata_scsi_lpm_put); |
ee959b00 | 186 | EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); |
ca77329f | 187 | |
45fabbb7 EO |
188 | static ssize_t ata_scsi_park_show(struct device *device, |
189 | struct device_attribute *attr, char *buf) | |
190 | { | |
191 | struct scsi_device *sdev = to_scsi_device(device); | |
192 | struct ata_port *ap; | |
193 | struct ata_link *link; | |
194 | struct ata_device *dev; | |
a464189d | 195 | unsigned long flags, now; |
45fabbb7 EO |
196 | unsigned int uninitialized_var(msecs); |
197 | int rc = 0; | |
198 | ||
199 | ap = ata_shost_to_port(sdev->host); | |
200 | ||
201 | spin_lock_irqsave(ap->lock, flags); | |
202 | dev = ata_scsi_find_dev(ap, sdev); | |
203 | if (!dev) { | |
204 | rc = -ENODEV; | |
205 | goto unlock; | |
206 | } | |
207 | if (dev->flags & ATA_DFLAG_NO_UNLOAD) { | |
208 | rc = -EOPNOTSUPP; | |
209 | goto unlock; | |
210 | } | |
211 | ||
212 | link = dev->link; | |
a464189d | 213 | now = jiffies; |
45fabbb7 EO |
214 | if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && |
215 | link->eh_context.unloaded_mask & (1 << dev->devno) && | |
a464189d EO |
216 | time_after(dev->unpark_deadline, now)) |
217 | msecs = jiffies_to_msecs(dev->unpark_deadline - now); | |
45fabbb7 EO |
218 | else |
219 | msecs = 0; | |
220 | ||
221 | unlock: | |
222 | spin_unlock_irq(ap->lock); | |
223 | ||
224 | return rc ? rc : snprintf(buf, 20, "%u\n", msecs); | |
225 | } | |
226 | ||
227 | static ssize_t ata_scsi_park_store(struct device *device, | |
228 | struct device_attribute *attr, | |
229 | const char *buf, size_t len) | |
230 | { | |
231 | struct scsi_device *sdev = to_scsi_device(device); | |
232 | struct ata_port *ap; | |
233 | struct ata_device *dev; | |
234 | long int input; | |
235 | unsigned long flags; | |
236 | int rc; | |
237 | ||
238 | rc = strict_strtol(buf, 10, &input); | |
239 | if (rc || input < -2) | |
240 | return -EINVAL; | |
241 | if (input > ATA_TMOUT_MAX_PARK) { | |
242 | rc = -EOVERFLOW; | |
243 | input = ATA_TMOUT_MAX_PARK; | |
244 | } | |
245 | ||
246 | ap = ata_shost_to_port(sdev->host); | |
247 | ||
248 | spin_lock_irqsave(ap->lock, flags); | |
249 | dev = ata_scsi_find_dev(ap, sdev); | |
250 | if (unlikely(!dev)) { | |
251 | rc = -ENODEV; | |
252 | goto unlock; | |
253 | } | |
254 | if (dev->class != ATA_DEV_ATA) { | |
255 | rc = -EOPNOTSUPP; | |
256 | goto unlock; | |
257 | } | |
258 | ||
259 | if (input >= 0) { | |
260 | if (dev->flags & ATA_DFLAG_NO_UNLOAD) { | |
261 | rc = -EOPNOTSUPP; | |
262 | goto unlock; | |
263 | } | |
264 | ||
265 | dev->unpark_deadline = ata_deadline(jiffies, input); | |
266 | dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; | |
267 | ata_port_schedule_eh(ap); | |
268 | complete(&ap->park_req_pending); | |
269 | } else { | |
270 | switch (input) { | |
271 | case -1: | |
272 | dev->flags &= ~ATA_DFLAG_NO_UNLOAD; | |
273 | break; | |
274 | case -2: | |
275 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
276 | break; | |
277 | } | |
278 | } | |
279 | unlock: | |
280 | spin_unlock_irqrestore(ap->lock, flags); | |
281 | ||
282 | return rc ? rc : len; | |
283 | } | |
284 | DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, | |
285 | ata_scsi_park_show, ata_scsi_park_store); | |
286 | EXPORT_SYMBOL_GPL(dev_attr_unload_heads); | |
287 | ||
f0761be3 TH |
288 | static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) |
289 | { | |
290 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
291 | ||
292 | scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); | |
293 | } | |
294 | ||
18f7ba4c KCA |
295 | static ssize_t |
296 | ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, | |
297 | const char *buf, size_t count) | |
298 | { | |
299 | struct Scsi_Host *shost = class_to_shost(dev); | |
300 | struct ata_port *ap = ata_shost_to_port(shost); | |
301 | if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) | |
302 | return ap->ops->em_store(ap, buf, count); | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | static ssize_t | |
307 | ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, | |
308 | char *buf) | |
309 | { | |
310 | struct Scsi_Host *shost = class_to_shost(dev); | |
311 | struct ata_port *ap = ata_shost_to_port(shost); | |
312 | ||
313 | if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) | |
314 | return ap->ops->em_show(ap, buf); | |
315 | return -EINVAL; | |
316 | } | |
ea7a5ed5 | 317 | DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, |
18f7ba4c KCA |
318 | ata_scsi_em_message_show, ata_scsi_em_message_store); |
319 | EXPORT_SYMBOL_GPL(dev_attr_em_message); | |
320 | ||
321 | static ssize_t | |
322 | ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, | |
323 | char *buf) | |
324 | { | |
325 | struct Scsi_Host *shost = class_to_shost(dev); | |
326 | struct ata_port *ap = ata_shost_to_port(shost); | |
327 | ||
328 | return snprintf(buf, 23, "%d\n", ap->em_message_type); | |
329 | } | |
330 | DEVICE_ATTR(em_message_type, S_IRUGO, | |
331 | ata_scsi_em_message_type_show, NULL); | |
332 | EXPORT_SYMBOL_GPL(dev_attr_em_message_type); | |
333 | ||
334 | static ssize_t | |
335 | ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, | |
336 | char *buf) | |
337 | { | |
338 | struct scsi_device *sdev = to_scsi_device(dev); | |
339 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
340 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
341 | ||
342 | if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY)) | |
343 | return ap->ops->sw_activity_show(atadev, buf); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | static ssize_t | |
348 | ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, | |
349 | const char *buf, size_t count) | |
350 | { | |
351 | struct scsi_device *sdev = to_scsi_device(dev); | |
352 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
353 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
354 | enum sw_activity val; | |
355 | int rc; | |
356 | ||
357 | if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) { | |
358 | val = simple_strtoul(buf, NULL, 0); | |
359 | switch (val) { | |
360 | case OFF: case BLINK_ON: case BLINK_OFF: | |
361 | rc = ap->ops->sw_activity_store(atadev, val); | |
362 | if (!rc) | |
363 | return count; | |
364 | else | |
365 | return rc; | |
366 | } | |
367 | } | |
368 | return -EINVAL; | |
369 | } | |
ea7a5ed5 | 370 | DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, |
18f7ba4c KCA |
371 | ata_scsi_activity_store); |
372 | EXPORT_SYMBOL_GPL(dev_attr_sw_activity); | |
373 | ||
45fabbb7 EO |
374 | struct device_attribute *ata_common_sdev_attrs[] = { |
375 | &dev_attr_unload_heads, | |
376 | NULL | |
377 | }; | |
378 | EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); | |
379 | ||
ae006510 DG |
380 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
381 | void (*done)(struct scsi_cmnd *)) | |
382 | { | |
383 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
384 | /* "Invalid field in cbd" */ | |
385 | done(cmd); | |
386 | } | |
387 | ||
1da177e4 LT |
388 | /** |
389 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
390 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
391 | * @bdev: block device associated with @sdev | |
392 | * @capacity: capacity of SCSI device | |
393 | * @geom: location to which geometry will be output | |
394 | * | |
395 | * Generic bios head/sector/cylinder calculator | |
396 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
397 | * mapping. Some situations may arise where the disk is not | |
398 | * bootable if this is not used. | |
399 | * | |
400 | * LOCKING: | |
401 | * Defined by the SCSI layer. We don't really care. | |
402 | * | |
403 | * RETURNS: | |
404 | * Zero. | |
405 | */ | |
406 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
407 | sector_t capacity, int geom[]) | |
408 | { | |
409 | geom[0] = 255; | |
410 | geom[1] = 63; | |
411 | sector_div(capacity, 255*63); | |
412 | geom[2] = capacity; | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
d8d9129e TH |
417 | /** |
418 | * ata_scsi_unlock_native_capacity - unlock native capacity | |
419 | * @sdev: SCSI device to adjust device capacity for | |
420 | * | |
421 | * This function is called if a partition on @sdev extends beyond | |
422 | * the end of the device. It requests EH to unlock HPA. | |
423 | * | |
424 | * LOCKING: | |
425 | * Defined by the SCSI layer. Might sleep. | |
426 | */ | |
427 | void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) | |
428 | { | |
429 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
430 | struct ata_device *dev; | |
431 | unsigned long flags; | |
432 | ||
433 | spin_lock_irqsave(ap->lock, flags); | |
434 | ||
435 | dev = ata_scsi_find_dev(ap, sdev); | |
436 | if (dev && dev->n_sectors < dev->n_native_sectors) { | |
437 | dev->flags |= ATA_DFLAG_UNLOCK_HPA; | |
438 | dev->link->eh_info.action |= ATA_EH_RESET; | |
439 | ata_port_schedule_eh(ap); | |
440 | } | |
441 | ||
442 | spin_unlock_irqrestore(ap->lock, flags); | |
443 | ata_port_wait_eh(ap); | |
444 | } | |
445 | ||
5924b74c TH |
446 | /** |
447 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
5eb66fe0 | 448 | * @ap: target port |
5924b74c TH |
449 | * @sdev: SCSI device to get identify data for |
450 | * @arg: User buffer area for identify data | |
451 | * | |
452 | * LOCKING: | |
453 | * Defined by the SCSI layer. We don't really care. | |
454 | * | |
455 | * RETURNS: | |
456 | * Zero on success, negative errno on error. | |
457 | */ | |
94be9a58 JG |
458 | static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, |
459 | void __user *arg) | |
5924b74c | 460 | { |
5924b74c TH |
461 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); |
462 | u16 __user *dst = arg; | |
463 | char buf[40]; | |
464 | ||
465 | if (!dev) | |
466 | return -ENOMSG; | |
467 | ||
468 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
469 | return -EFAULT; | |
470 | ||
471 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
472 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
473 | return -EFAULT; | |
474 | ||
475 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
476 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
477 | return -EFAULT; | |
478 | ||
479 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
480 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
481 | return -EFAULT; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
b095518e JG |
486 | /** |
487 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 488 | * @scsidev: Device to which we are issuing command |
b095518e JG |
489 | * @arg: User provided data for issuing command |
490 | * | |
491 | * LOCKING: | |
492 | * Defined by the SCSI layer. We don't really care. | |
493 | * | |
494 | * RETURNS: | |
495 | * Zero on success, negative errno on error. | |
496 | */ | |
b095518e JG |
497 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
498 | { | |
499 | int rc = 0; | |
500 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 501 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 502 | int argsize = 0; |
85837ebd | 503 | enum dma_data_direction data_dir; |
bbe1fe7e | 504 | int cmd_result; |
b095518e | 505 | |
c893a3ae | 506 | if (arg == NULL) |
b095518e JG |
507 | return -EINVAL; |
508 | ||
509 | if (copy_from_user(args, arg, sizeof(args))) | |
510 | return -EFAULT; | |
511 | ||
bbe1fe7e ET |
512 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
513 | if (!sensebuf) | |
514 | return -ENOMEM; | |
515 | ||
b095518e JG |
516 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
517 | ||
518 | if (args[3]) { | |
519 | argsize = SECTOR_SIZE * args[3]; | |
520 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
521 | if (argbuf == NULL) { |
522 | rc = -ENOMEM; | |
523 | goto error; | |
524 | } | |
b095518e JG |
525 | |
526 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
527 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
2dcb407e | 528 | block count in sector count field */ |
85837ebd | 529 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
530 | } else { |
531 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 532 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 533 | data_dir = DMA_NONE; |
b095518e JG |
534 | } |
535 | ||
536 | scsi_cmd[0] = ATA_16; | |
537 | ||
538 | scsi_cmd[4] = args[2]; | |
a4f19040 | 539 | if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ |
b095518e JG |
540 | scsi_cmd[6] = args[3]; |
541 | scsi_cmd[8] = args[1]; | |
542 | scsi_cmd[10] = 0x4f; | |
543 | scsi_cmd[12] = 0xc2; | |
544 | } else { | |
545 | scsi_cmd[6] = args[1]; | |
546 | } | |
547 | scsi_cmd[14] = args[0]; | |
548 | ||
549 | /* Good values for timeout and retries? Values below | |
550 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e | 551 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
f4f4e47e | 552 | sensebuf, (10*HZ), 5, 0, NULL); |
bbe1fe7e ET |
553 | |
554 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
555 | u8 *desc = sensebuf + 8; | |
556 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
557 | ||
558 | /* If we set cc then ATA pass-through will cause a | |
559 | * check condition even if no error. Filter that. */ | |
560 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
561 | struct scsi_sense_hdr sshdr; | |
562 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
2dcb407e JG |
563 | &sshdr); |
564 | if (sshdr.sense_key == 0 && | |
565 | sshdr.asc == 0 && sshdr.ascq == 0) | |
bbe1fe7e ET |
566 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
567 | } | |
568 | ||
569 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
2dcb407e JG |
570 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ |
571 | desc[0] == 0x09) { /* code is "ATA Descriptor" */ | |
572 | args[0] = desc[13]; /* status */ | |
573 | args[1] = desc[3]; /* error */ | |
574 | args[2] = desc[5]; /* sector count (0:7) */ | |
bbe1fe7e ET |
575 | if (copy_to_user(arg, args, sizeof(args))) |
576 | rc = -EFAULT; | |
577 | } | |
578 | } | |
579 | ||
580 | ||
581 | if (cmd_result) { | |
b095518e JG |
582 | rc = -EIO; |
583 | goto error; | |
584 | } | |
585 | ||
b095518e | 586 | if ((argbuf) |
c893a3ae | 587 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
588 | rc = -EFAULT; |
589 | error: | |
bbe1fe7e | 590 | kfree(sensebuf); |
8f760780 | 591 | kfree(argbuf); |
b095518e JG |
592 | return rc; |
593 | } | |
594 | ||
595 | /** | |
596 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 597 | * @scsidev: Device to which we are issuing command |
b095518e JG |
598 | * @arg: User provided data for issuing command |
599 | * | |
600 | * LOCKING: | |
601 | * Defined by the SCSI layer. We don't really care. | |
602 | * | |
603 | * RETURNS: | |
604 | * Zero on success, negative errno on error. | |
605 | */ | |
606 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
607 | { | |
608 | int rc = 0; | |
609 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
610 | u8 args[7], *sensebuf = NULL; |
611 | int cmd_result; | |
b095518e | 612 | |
c893a3ae | 613 | if (arg == NULL) |
b095518e JG |
614 | return -EINVAL; |
615 | ||
616 | if (copy_from_user(args, arg, sizeof(args))) | |
617 | return -EFAULT; | |
618 | ||
af068bd1 DM |
619 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
620 | if (!sensebuf) | |
621 | return -ENOMEM; | |
622 | ||
b095518e JG |
623 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
624 | scsi_cmd[0] = ATA_16; | |
625 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 626 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
627 | scsi_cmd[4] = args[1]; |
628 | scsi_cmd[6] = args[2]; | |
629 | scsi_cmd[8] = args[3]; | |
630 | scsi_cmd[10] = args[4]; | |
631 | scsi_cmd[12] = args[5]; | |
277239f2 | 632 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
633 | scsi_cmd[14] = args[0]; |
634 | ||
b095518e | 635 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 636 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 | 637 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
f4f4e47e | 638 | sensebuf, (10*HZ), 5, 0, NULL); |
af068bd1 DM |
639 | |
640 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
641 | u8 *desc = sensebuf + 8; | |
642 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
643 | ||
644 | /* If we set cc then ATA pass-through will cause a | |
645 | * check condition even if no error. Filter that. */ | |
646 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
647 | struct scsi_sense_hdr sshdr; | |
648 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
649 | &sshdr); | |
2dcb407e JG |
650 | if (sshdr.sense_key == 0 && |
651 | sshdr.asc == 0 && sshdr.ascq == 0) | |
af068bd1 DM |
652 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
653 | } | |
654 | ||
655 | /* Send userspace ATA registers */ | |
656 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
657 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
658 | args[0] = desc[13]; /* status */ | |
659 | args[1] = desc[3]; /* error */ | |
660 | args[2] = desc[5]; /* sector count (0:7) */ | |
661 | args[3] = desc[7]; /* lbal */ | |
662 | args[4] = desc[9]; /* lbam */ | |
663 | args[5] = desc[11]; /* lbah */ | |
664 | args[6] = desc[12]; /* select */ | |
665 | if (copy_to_user(arg, args, sizeof(args))) | |
666 | rc = -EFAULT; | |
667 | } | |
668 | } | |
669 | ||
670 | if (cmd_result) { | |
b095518e | 671 | rc = -EIO; |
af068bd1 DM |
672 | goto error; |
673 | } | |
b095518e | 674 | |
af068bd1 DM |
675 | error: |
676 | kfree(sensebuf); | |
b095518e JG |
677 | return rc; |
678 | } | |
679 | ||
e3cf95dd AC |
680 | static int ata_ioc32(struct ata_port *ap) |
681 | { | |
682 | if (ap->flags & ATA_FLAG_PIO_DMA) | |
683 | return 1; | |
684 | if (ap->pflags & ATA_PFLAG_PIO32) | |
685 | return 1; | |
686 | return 0; | |
687 | } | |
688 | ||
94be9a58 JG |
689 | int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, |
690 | int cmd, void __user *arg) | |
1da177e4 | 691 | { |
1da177e4 | 692 | int val = -EINVAL, rc = -EINVAL; |
e3cf95dd | 693 | unsigned long flags; |
1da177e4 | 694 | |
1da177e4 LT |
695 | switch (cmd) { |
696 | case ATA_IOC_GET_IO32: | |
e3cf95dd AC |
697 | spin_lock_irqsave(ap->lock, flags); |
698 | val = ata_ioc32(ap); | |
699 | spin_unlock_irqrestore(ap->lock, flags); | |
1da177e4 LT |
700 | if (copy_to_user(arg, &val, 1)) |
701 | return -EFAULT; | |
702 | return 0; | |
703 | ||
704 | case ATA_IOC_SET_IO32: | |
705 | val = (unsigned long) arg; | |
e3cf95dd AC |
706 | rc = 0; |
707 | spin_lock_irqsave(ap->lock, flags); | |
708 | if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { | |
709 | if (val) | |
710 | ap->pflags |= ATA_PFLAG_PIO32; | |
711 | else | |
712 | ap->pflags &= ~ATA_PFLAG_PIO32; | |
713 | } else { | |
714 | if (val != ata_ioc32(ap)) | |
715 | rc = -EINVAL; | |
716 | } | |
717 | spin_unlock_irqrestore(ap->lock, flags); | |
718 | return rc; | |
1da177e4 | 719 | |
5924b74c | 720 | case HDIO_GET_IDENTITY: |
94be9a58 | 721 | return ata_get_identity(ap, scsidev, arg); |
5924b74c | 722 | |
b095518e JG |
723 | case HDIO_DRIVE_CMD: |
724 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
725 | return -EACCES; | |
726 | return ata_cmd_ioctl(scsidev, arg); | |
727 | ||
728 | case HDIO_DRIVE_TASK: | |
729 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
730 | return -EACCES; | |
731 | return ata_task_ioctl(scsidev, arg); | |
732 | ||
1da177e4 LT |
733 | default: |
734 | rc = -ENOTTY; | |
735 | break; | |
736 | } | |
737 | ||
1da177e4 LT |
738 | return rc; |
739 | } | |
94be9a58 JG |
740 | EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); |
741 | ||
742 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
743 | { | |
744 | return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), | |
745 | scsidev, cmd, arg); | |
746 | } | |
747 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); | |
1da177e4 LT |
748 | |
749 | /** | |
750 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
751 | * @dev: ATA device to which the new command is attached |
752 | * @cmd: SCSI command that originated this ATA command | |
753 | * @done: SCSI command completion function | |
754 | * | |
755 | * Obtain a reference to an unused ata_queued_cmd structure, | |
756 | * which is the basic libata structure representing a single | |
757 | * ATA command sent to the hardware. | |
758 | * | |
759 | * If a command was available, fill in the SCSI-specific | |
760 | * portions of the structure with information on the | |
761 | * current command. | |
762 | * | |
763 | * LOCKING: | |
cca3974e | 764 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
765 | * |
766 | * RETURNS: | |
767 | * Command allocated, or %NULL if none available. | |
768 | */ | |
7102d230 AB |
769 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
770 | struct scsi_cmnd *cmd, | |
771 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
772 | { |
773 | struct ata_queued_cmd *qc; | |
774 | ||
8a8bc223 | 775 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
776 | if (qc) { |
777 | qc->scsicmd = cmd; | |
778 | qc->scsidone = done; | |
779 | ||
ff2aeb1e | 780 | qc->sg = scsi_sglist(cmd); |
7120165c | 781 | qc->n_elem = scsi_sg_count(cmd); |
1da177e4 LT |
782 | } else { |
783 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
784 | done(cmd); | |
785 | } | |
786 | ||
787 | return qc; | |
788 | } | |
789 | ||
aacda375 TH |
790 | static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) |
791 | { | |
792 | struct scsi_cmnd *scmd = qc->scsicmd; | |
793 | ||
794 | qc->extrabytes = scmd->request->extra_len; | |
795 | qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; | |
796 | } | |
797 | ||
b095518e JG |
798 | /** |
799 | * ata_dump_status - user friendly display of error info | |
800 | * @id: id of the port in question | |
801 | * @tf: ptr to filled out taskfile | |
802 | * | |
803 | * Decode and dump the ATA error/status registers for the user so | |
804 | * that they have some idea what really happened at the non | |
805 | * make-believe layer. | |
806 | * | |
807 | * LOCKING: | |
808 | * inherited from caller | |
809 | */ | |
7102d230 | 810 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
811 | { |
812 | u8 stat = tf->command, err = tf->feature; | |
813 | ||
814 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
815 | if (stat & ATA_BUSY) { | |
816 | printk("Busy }\n"); /* Data is not valid in this case */ | |
817 | } else { | |
818 | if (stat & 0x40) printk("DriveReady "); | |
819 | if (stat & 0x20) printk("DeviceFault "); | |
820 | if (stat & 0x10) printk("SeekComplete "); | |
821 | if (stat & 0x08) printk("DataRequest "); | |
822 | if (stat & 0x04) printk("CorrectedError "); | |
823 | if (stat & 0x02) printk("Index "); | |
824 | if (stat & 0x01) printk("Error "); | |
825 | printk("}\n"); | |
826 | ||
827 | if (err) { | |
828 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
829 | if (err & 0x04) printk("DriveStatusError "); | |
830 | if (err & 0x80) { | |
831 | if (err & 0x04) printk("BadCRC "); | |
832 | else printk("Sector "); | |
833 | } | |
834 | if (err & 0x40) printk("UncorrectableError "); | |
835 | if (err & 0x10) printk("SectorIdNotFound "); | |
836 | if (err & 0x02) printk("TrackZeroNotFound "); | |
837 | if (err & 0x01) printk("AddrMarkNotFound "); | |
838 | printk("}\n"); | |
839 | } | |
840 | } | |
841 | } | |
842 | ||
1da177e4 LT |
843 | /** |
844 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 845 | * @id: ATA device number |
1da177e4 | 846 | * @drv_stat: value contained in ATA status register |
b095518e JG |
847 | * @drv_err: value contained in ATA error register |
848 | * @sk: the sense key we'll fill out | |
849 | * @asc: the additional sense code we'll fill out | |
850 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 851 | * @verbose: be verbose |
1da177e4 | 852 | * |
b095518e JG |
853 | * Converts an ATA error into a SCSI error. Fill out pointers to |
854 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
855 | * format sense blocks. | |
1da177e4 LT |
856 | * |
857 | * LOCKING: | |
cca3974e | 858 | * spin_lock_irqsave(host lock) |
1da177e4 | 859 | */ |
7102d230 AB |
860 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
861 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 862 | { |
b095518e | 863 | int i; |
ffe75ef6 | 864 | |
1da177e4 | 865 | /* Based on the 3ware driver translation table */ |
98ac62de | 866 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
867 | /* BBD|ECC|ID|MAR */ |
868 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
869 | /* BBD|ECC|ID */ | |
870 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
871 | /* ECC|MC|MARK */ | |
872 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
873 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
874 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
875 | /* MC|ID|ABRT|TRK0|MARK */ | |
876 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
877 | /* MCR|MARK */ | |
878 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
879 | /* Bad address mark */ | |
880 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
881 | /* TRK0 */ | |
882 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
883 | /* Abort & !ICRC */ | |
884 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
885 | /* Media change request */ | |
886 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
887 | /* SRV */ | |
888 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
889 | /* Media change */ | |
890 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
891 | /* ECC */ | |
892 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
893 | /* BBD - block marked bad */ | |
894 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
895 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
896 | }; | |
98ac62de | 897 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
898 | /* Must be first because BUSY means no other bits valid */ |
899 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
900 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
901 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
902 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
903 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
904 | }; | |
1da177e4 | 905 | |
1da177e4 LT |
906 | /* |
907 | * Is this an error we can process/parse | |
908 | */ | |
b095518e JG |
909 | if (drv_stat & ATA_BUSY) { |
910 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 911 | } |
b095518e JG |
912 | |
913 | if (drv_err) { | |
914 | /* Look for drv_err */ | |
915 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
916 | /* Look for best matches first */ | |
2e9edbf8 | 917 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
918 | sense_table[i][0]) { |
919 | *sk = sense_table[i][1]; | |
920 | *asc = sense_table[i][2]; | |
921 | *ascq = sense_table[i][3]; | |
922 | goto translate_done; | |
923 | } | |
924 | } | |
925 | /* No immediate match */ | |
246619da TH |
926 | if (verbose) |
927 | printk(KERN_WARNING "ata%u: no sense translation for " | |
928 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 929 | } |
b095518e JG |
930 | |
931 | /* Fall back to interpreting status bits */ | |
932 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
933 | if (stat_table[i][0] & drv_stat) { | |
934 | *sk = stat_table[i][1]; | |
935 | *asc = stat_table[i][2]; | |
936 | *ascq = stat_table[i][3]; | |
937 | goto translate_done; | |
1da177e4 | 938 | } |
b095518e JG |
939 | } |
940 | /* No error? Undecoded? */ | |
246619da TH |
941 | if (verbose) |
942 | printk(KERN_WARNING "ata%u: no sense translation for " | |
943 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 944 | |
2d202024 AC |
945 | /* We need a sensible error return here, which is tricky, and one |
946 | that won't cause people to do things like return a disk wrongly */ | |
947 | *sk = ABORTED_COMMAND; | |
948 | *asc = 0x00; | |
949 | *ascq = 0x00; | |
b095518e JG |
950 | |
951 | translate_done: | |
246619da TH |
952 | if (verbose) |
953 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
954 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
955 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
956 | return; |
957 | } | |
958 | ||
959 | /* | |
750426aa | 960 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
961 | * @qc: Command that completed. |
962 | * | |
963 | * This function is specific to the ATA descriptor format sense | |
964 | * block specified for the ATA pass through commands. Regardless | |
965 | * of whether the command errored or not, return a sense | |
966 | * block. Copy all controller registers into the sense | |
967 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
968 | * | |
969 | * LOCKING: | |
750426aa | 970 | * None. |
b095518e | 971 | */ |
750426aa | 972 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
973 | { |
974 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 975 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
976 | unsigned char *sb = cmd->sense_buffer; |
977 | unsigned char *desc = sb + 8; | |
246619da | 978 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
979 | |
980 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
981 | ||
0e5dec47 | 982 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 983 | |
b095518e JG |
984 | /* |
985 | * Use ata_to_sense_error() to map status register bits | |
986 | * onto sense key, asc & ascq. | |
987 | */ | |
058e55e1 TH |
988 | if (qc->err_mask || |
989 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 990 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 991 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 992 | sb[1] &= 0x0f; |
1da177e4 LT |
993 | } |
994 | ||
b095518e JG |
995 | /* |
996 | * Sense data is current and format is descriptor. | |
997 | */ | |
998 | sb[0] = 0x72; | |
1da177e4 | 999 | |
b095518e JG |
1000 | desc[0] = 0x09; |
1001 | ||
f38621b3 TH |
1002 | /* set length of additional sense data */ |
1003 | sb[7] = 14; | |
1004 | desc[1] = 12; | |
b095518e JG |
1005 | |
1006 | /* | |
1007 | * Copy registers into sense buffer. | |
1008 | */ | |
1009 | desc[2] = 0x00; | |
1010 | desc[3] = tf->feature; /* == error reg */ | |
1011 | desc[5] = tf->nsect; | |
1012 | desc[7] = tf->lbal; | |
1013 | desc[9] = tf->lbam; | |
1014 | desc[11] = tf->lbah; | |
1015 | desc[12] = tf->device; | |
1016 | desc[13] = tf->command; /* == status reg */ | |
1017 | ||
1018 | /* | |
1019 | * Fill in Extend bit, and the high order bytes | |
1020 | * if applicable. | |
1021 | */ | |
1022 | if (tf->flags & ATA_TFLAG_LBA48) { | |
1023 | desc[2] |= 0x01; | |
1024 | desc[4] = tf->hob_nsect; | |
1025 | desc[6] = tf->hob_lbal; | |
1026 | desc[8] = tf->hob_lbam; | |
1027 | desc[10] = tf->hob_lbah; | |
1da177e4 | 1028 | } |
b095518e | 1029 | } |
1da177e4 | 1030 | |
b095518e | 1031 | /** |
750426aa | 1032 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
1033 | * @qc: Command that we are erroring out |
1034 | * | |
d25614ba TH |
1035 | * Generate sense block for a failed ATA command @qc. Descriptor |
1036 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
1037 | * |
1038 | * LOCKING: | |
750426aa | 1039 | * None. |
b095518e | 1040 | */ |
750426aa | 1041 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 1042 | { |
d25614ba | 1043 | struct ata_device *dev = qc->dev; |
b095518e | 1044 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 1045 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 1046 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 1047 | unsigned char *desc = sb + 8; |
246619da | 1048 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 1049 | u64 block; |
b095518e JG |
1050 | |
1051 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
1052 | ||
0e5dec47 | 1053 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 1054 | |
d25614ba TH |
1055 | /* sense data is current and format is descriptor */ |
1056 | sb[0] = 0x72; | |
1057 | ||
1058 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
1059 | * onto sense key, asc & ascq. |
1060 | */ | |
058e55e1 TH |
1061 | if (qc->err_mask || |
1062 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 1063 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
1064 | &sb[1], &sb[2], &sb[3], verbose); |
1065 | sb[1] &= 0x0f; | |
1da177e4 | 1066 | } |
1da177e4 | 1067 | |
d25614ba | 1068 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 1069 | |
d25614ba TH |
1070 | /* information sense data descriptor */ |
1071 | sb[7] = 12; | |
1072 | desc[0] = 0x00; | |
1073 | desc[1] = 10; | |
a7dac447 | 1074 | |
d25614ba TH |
1075 | desc[2] |= 0x80; /* valid */ |
1076 | desc[6] = block >> 40; | |
1077 | desc[7] = block >> 32; | |
1078 | desc[8] = block >> 24; | |
1079 | desc[9] = block >> 16; | |
1080 | desc[10] = block >> 8; | |
1081 | desc[11] = block; | |
1da177e4 LT |
1082 | } |
1083 | ||
a6cce2a7 BK |
1084 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
1085 | { | |
1086 | sdev->use_10_for_rw = 1; | |
1087 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
1088 | |
1089 | /* Schedule policy is determined by ->qc_defer() callback and | |
1090 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
1091 | * prevent SCSI midlayer from automatically deferring | |
1092 | * requests. | |
1093 | */ | |
1094 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
1095 | } |
1096 | ||
fa2fc7f4 JB |
1097 | /** |
1098 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 1099 | * @rq: request to be checked |
fa2fc7f4 JB |
1100 | * |
1101 | * ATAPI commands which transfer variable length data to host | |
1102 | * might overflow due to application error or hardare bug. This | |
1103 | * function checks whether overflow should be drained and ignored | |
1104 | * for @request. | |
1105 | * | |
1106 | * LOCKING: | |
1107 | * None. | |
1108 | * | |
1109 | * RETURNS: | |
1110 | * 1 if ; otherwise, 0. | |
1111 | */ | |
1112 | static int atapi_drain_needed(struct request *rq) | |
1113 | { | |
33659ebb | 1114 | if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) |
fa2fc7f4 JB |
1115 | return 0; |
1116 | ||
7b6d91da | 1117 | if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) |
fa2fc7f4 JB |
1118 | return 0; |
1119 | ||
1120 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
1121 | } | |
1122 | ||
1123 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
1124 | struct ata_device *dev) | |
a6cce2a7 | 1125 | { |
45fabbb7 EO |
1126 | if (!ata_id_has_unload(dev->id)) |
1127 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
1128 | ||
914ed354 | 1129 | /* configure max sectors */ |
086fa5ff | 1130 | blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors); |
a6cce2a7 | 1131 | |
fa2fc7f4 JB |
1132 | if (dev->class == ATA_DEV_ATAPI) { |
1133 | struct request_queue *q = sdev->request_queue; | |
1134 | void *buf; | |
1135 | ||
e3790c7d | 1136 | /* set the min alignment and padding */ |
d0ad3bc9 JB |
1137 | blk_queue_update_dma_alignment(sdev->request_queue, |
1138 | ATA_DMA_PAD_SZ - 1); | |
27f8221a FT |
1139 | blk_queue_update_dma_pad(sdev->request_queue, |
1140 | ATA_DMA_PAD_SZ - 1); | |
fa2fc7f4 JB |
1141 | |
1142 | /* configure draining */ | |
1143 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
1144 | if (!buf) { | |
1145 | ata_dev_printk(dev, KERN_ERR, | |
1146 | "drain buffer allocation failed\n"); | |
1147 | return -ENOMEM; | |
1148 | } | |
1149 | ||
1150 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
1151 | } else { | |
d0ad3bc9 JB |
1152 | /* ATA devices must be sector aligned */ |
1153 | blk_queue_update_dma_alignment(sdev->request_queue, | |
1154 | ATA_SECT_SIZE - 1); | |
d8cf5389 | 1155 | sdev->manage_start_stop = 1; |
dde20207 | 1156 | } |
d8cf5389 | 1157 | |
f26792d5 JG |
1158 | if (dev->flags & ATA_DFLAG_AN) |
1159 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
1160 | ||
a6e6ce8e TH |
1161 | if (dev->flags & ATA_DFLAG_NCQ) { |
1162 | int depth; | |
1163 | ||
1164 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
1165 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
8a8bc223 | 1166 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); |
a6e6ce8e | 1167 | } |
fa2fc7f4 JB |
1168 | |
1169 | return 0; | |
a6cce2a7 BK |
1170 | } |
1171 | ||
1da177e4 LT |
1172 | /** |
1173 | * ata_scsi_slave_config - Set SCSI device attributes | |
1174 | * @sdev: SCSI device to examine | |
1175 | * | |
1176 | * This is called before we actually start reading | |
1177 | * and writing to the device, to configure certain | |
1178 | * SCSI mid-layer behaviors. | |
1179 | * | |
1180 | * LOCKING: | |
1181 | * Defined by SCSI layer. We don't really care. | |
1182 | */ | |
1183 | ||
1184 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
1185 | { | |
31534363 TH |
1186 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
1187 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 1188 | int rc = 0; |
31534363 | 1189 | |
a6cce2a7 | 1190 | ata_scsi_sdev_config(sdev); |
1da177e4 | 1191 | |
31534363 | 1192 | if (dev) |
fa2fc7f4 | 1193 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 1194 | |
fa2fc7f4 | 1195 | return rc; |
1da177e4 LT |
1196 | } |
1197 | ||
83c47bcb TH |
1198 | /** |
1199 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
1200 | * @sdev: SCSI device to be destroyed | |
1201 | * | |
1202 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
1203 | * this unplugging was initiated by libata as indicated by NULL | |
1204 | * dev->sdev, this function doesn't have to do anything. | |
1205 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
1206 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
1207 | * EH. | |
1208 | * | |
1209 | * LOCKING: | |
1210 | * Defined by SCSI layer. We don't really care. | |
1211 | */ | |
1212 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
1213 | { | |
1214 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 1215 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
1216 | unsigned long flags; |
1217 | struct ata_device *dev; | |
1218 | ||
1219 | if (!ap->ops->error_handler) | |
1220 | return; | |
1221 | ||
ba6a1308 | 1222 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
1223 | dev = __ata_scsi_find_dev(ap, sdev); |
1224 | if (dev && dev->sdev) { | |
1225 | /* SCSI device already in CANCEL state, no need to offline it */ | |
1226 | dev->sdev = NULL; | |
1227 | dev->flags |= ATA_DFLAG_DETACH; | |
1228 | ata_port_schedule_eh(ap); | |
1229 | } | |
ba6a1308 | 1230 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
1231 | |
1232 | kfree(q->dma_drain_buffer); | |
1233 | q->dma_drain_buffer = NULL; | |
1234 | q->dma_drain_size = 0; | |
83c47bcb TH |
1235 | } |
1236 | ||
a6e6ce8e TH |
1237 | /** |
1238 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
1239 | * @sdev: SCSI device to configure queue depth for | |
1240 | * @queue_depth: new queue depth | |
e881a172 | 1241 | * @reason: calling context |
a6e6ce8e TH |
1242 | * |
1243 | * This is libata standard hostt->change_queue_depth callback. | |
1244 | * SCSI will call into this callback when user tries to set queue | |
1245 | * depth via sysfs. | |
1246 | * | |
1247 | * LOCKING: | |
1248 | * SCSI layer (we don't care) | |
1249 | * | |
1250 | * RETURNS: | |
1251 | * Newly configured queue depth. | |
1252 | */ | |
e881a172 MC |
1253 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, |
1254 | int reason) | |
a6e6ce8e TH |
1255 | { |
1256 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
1257 | struct ata_device *dev; | |
360f654e | 1258 | unsigned long flags; |
a6e6ce8e | 1259 | |
e881a172 MC |
1260 | if (reason != SCSI_QDEPTH_DEFAULT) |
1261 | return -EOPNOTSUPP; | |
1262 | ||
c3c70c44 | 1263 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
1264 | return sdev->queue_depth; |
1265 | ||
1266 | dev = ata_scsi_find_dev(ap, sdev); | |
1267 | if (!dev || !ata_dev_enabled(dev)) | |
1268 | return sdev->queue_depth; | |
1269 | ||
c3c70c44 | 1270 | /* NCQ enabled? */ |
360f654e | 1271 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
1272 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
1273 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 1274 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
1275 | queue_depth = 1; |
1276 | } | |
360f654e TH |
1277 | spin_unlock_irqrestore(ap->lock, flags); |
1278 | ||
c3c70c44 TH |
1279 | /* limit and apply queue depth */ |
1280 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1281 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1282 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1283 | ||
1284 | if (sdev->queue_depth == queue_depth) | |
1285 | return -EINVAL; | |
1286 | ||
1287 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1288 | return queue_depth; |
1289 | } | |
1290 | ||
972dcafb DG |
1291 | /** |
1292 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1293 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1294 | * |
1295 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1296 | * (to start). Perhaps these commands should be preceded by | |
1297 | * CHECK POWER MODE to see what power mode the device is already in. | |
1298 | * [See SAT revision 5 at www.t10.org] | |
1299 | * | |
1300 | * LOCKING: | |
cca3974e | 1301 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1302 | * |
1303 | * RETURNS: | |
1304 | * Zero on success, non-zero on error. | |
1305 | */ | |
ad706991 | 1306 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1307 | { |
542b1444 | 1308 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1309 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1310 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1311 | |
2e5704f6 TH |
1312 | if (scmd->cmd_len < 5) |
1313 | goto invalid_fld; | |
1314 | ||
972dcafb DG |
1315 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1316 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1317 | if (cdb[1] & 0x1) { |
972dcafb DG |
1318 | ; /* ignore IMMED bit, violates sat-r05 */ |
1319 | } | |
542b1444 | 1320 | if (cdb[4] & 0x2) |
ae006510 | 1321 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1322 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1323 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 | 1324 | |
542b1444 | 1325 | if (cdb[4] & 0x1) { |
972dcafb | 1326 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1327 | |
1328 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1329 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1330 | |
1331 | tf->lbah = 0x0; | |
1332 | tf->lbam = 0x0; | |
1333 | tf->lbal = 0x0; | |
1334 | tf->device |= ATA_LBA; | |
1335 | } else { | |
1336 | /* CHS */ | |
1337 | tf->lbal = 0x1; /* sect */ | |
1338 | tf->lbam = 0x0; /* cyl low */ | |
1339 | tf->lbah = 0x0; /* cyl high */ | |
1340 | } | |
1341 | ||
972dcafb | 1342 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 | 1343 | } else { |
2a6e58d2 RW |
1344 | /* Some odd clown BIOSen issue spindown on power off (ACPI S4 |
1345 | * or S5) causing some drives to spin up and down again. | |
1346 | */ | |
1347 | if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && | |
1348 | system_state == SYSTEM_POWER_OFF) | |
1349 | goto skip; | |
1350 | ||
1351 | if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && | |
1352 | system_entering_hibernation()) | |
1353 | goto skip; | |
1354 | ||
78981a7c RH |
1355 | /* Issue ATA STANDBY IMMEDIATE command */ |
1356 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1357 | } |
78981a7c | 1358 | |
972dcafb DG |
1359 | /* |
1360 | * Standby and Idle condition timers could be implemented but that | |
1361 | * would require libata to implement the Power condition mode page | |
1362 | * and allow the user to change it. Changing mode pages requires | |
1363 | * MODE SELECT to be implemented. | |
1364 | */ | |
1365 | ||
1366 | return 0; | |
ae006510 | 1367 | |
2a6e58d2 | 1368 | invalid_fld: |
542b1444 | 1369 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1370 | /* "Invalid field in cbd" */ |
1371 | return 1; | |
2a6e58d2 RW |
1372 | skip: |
1373 | scmd->result = SAM_STAT_GOOD; | |
1374 | return 1; | |
972dcafb DG |
1375 | } |
1376 | ||
1377 | ||
1da177e4 LT |
1378 | /** |
1379 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1380 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1381 | * |
1382 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1383 | * FLUSH CACHE EXT. | |
1384 | * | |
1385 | * LOCKING: | |
cca3974e | 1386 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1387 | * |
1388 | * RETURNS: | |
1389 | * Zero on success, non-zero on error. | |
1390 | */ | |
ad706991 | 1391 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1392 | { |
1393 | struct ata_taskfile *tf = &qc->tf; | |
1394 | ||
1395 | tf->flags |= ATA_TFLAG_DEVICE; | |
1396 | tf->protocol = ATA_PROT_NODATA; | |
1397 | ||
6fc49adb | 1398 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1399 | tf->command = ATA_CMD_FLUSH_EXT; |
1400 | else | |
1401 | tf->command = ATA_CMD_FLUSH; | |
1402 | ||
b666da35 TH |
1403 | /* flush is critical for IO integrity, consider it an IO command */ |
1404 | qc->flags |= ATA_QCFLAG_IO; | |
1405 | ||
1da177e4 LT |
1406 | return 0; |
1407 | } | |
1408 | ||
3aef5231 AL |
1409 | /** |
1410 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1411 | * @cdb: SCSI command to translate |
3aef5231 AL |
1412 | * |
1413 | * Calculate LBA and transfer length for 6-byte commands. | |
1414 | * | |
1415 | * RETURNS: | |
1416 | * @plba: the LBA | |
1417 | * @plen: the transfer length | |
1418 | */ | |
542b1444 | 1419 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1420 | { |
1421 | u64 lba = 0; | |
6c7b7d2b | 1422 | u32 len; |
3aef5231 AL |
1423 | |
1424 | VPRINTK("six-byte command\n"); | |
1425 | ||
6c7b7d2b | 1426 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1427 | lba |= ((u64)cdb[2]) << 8; |
1428 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1429 | |
6c7b7d2b | 1430 | len = cdb[4]; |
3aef5231 AL |
1431 | |
1432 | *plba = lba; | |
1433 | *plen = len; | |
1434 | } | |
1435 | ||
1436 | /** | |
1437 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1438 | * @cdb: SCSI command to translate |
3aef5231 AL |
1439 | * |
1440 | * Calculate LBA and transfer length for 10-byte commands. | |
1441 | * | |
1442 | * RETURNS: | |
1443 | * @plba: the LBA | |
1444 | * @plen: the transfer length | |
1445 | */ | |
542b1444 | 1446 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1447 | { |
1448 | u64 lba = 0; | |
1449 | u32 len = 0; | |
1450 | ||
1451 | VPRINTK("ten-byte command\n"); | |
1452 | ||
542b1444 TH |
1453 | lba |= ((u64)cdb[2]) << 24; |
1454 | lba |= ((u64)cdb[3]) << 16; | |
1455 | lba |= ((u64)cdb[4]) << 8; | |
1456 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1457 | |
542b1444 TH |
1458 | len |= ((u32)cdb[7]) << 8; |
1459 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1460 | |
1461 | *plba = lba; | |
1462 | *plen = len; | |
1463 | } | |
1464 | ||
1465 | /** | |
1466 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1467 | * @cdb: SCSI command to translate |
3aef5231 AL |
1468 | * |
1469 | * Calculate LBA and transfer length for 16-byte commands. | |
1470 | * | |
1471 | * RETURNS: | |
1472 | * @plba: the LBA | |
1473 | * @plen: the transfer length | |
1474 | */ | |
542b1444 | 1475 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1476 | { |
1477 | u64 lba = 0; | |
1478 | u32 len = 0; | |
1479 | ||
1480 | VPRINTK("sixteen-byte command\n"); | |
1481 | ||
542b1444 TH |
1482 | lba |= ((u64)cdb[2]) << 56; |
1483 | lba |= ((u64)cdb[3]) << 48; | |
1484 | lba |= ((u64)cdb[4]) << 40; | |
1485 | lba |= ((u64)cdb[5]) << 32; | |
1486 | lba |= ((u64)cdb[6]) << 24; | |
1487 | lba |= ((u64)cdb[7]) << 16; | |
1488 | lba |= ((u64)cdb[8]) << 8; | |
1489 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1490 | |
542b1444 TH |
1491 | len |= ((u32)cdb[10]) << 24; |
1492 | len |= ((u32)cdb[11]) << 16; | |
1493 | len |= ((u32)cdb[12]) << 8; | |
1494 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1495 | |
1496 | *plba = lba; | |
1497 | *plen = len; | |
1498 | } | |
1499 | ||
1da177e4 LT |
1500 | /** |
1501 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1502 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1503 | * |
1504 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1505 | * | |
1506 | * LOCKING: | |
cca3974e | 1507 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1508 | * |
1509 | * RETURNS: | |
1510 | * Zero on success, non-zero on error. | |
1511 | */ | |
ad706991 | 1512 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1513 | { |
542b1444 | 1514 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1515 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1516 | struct ata_device *dev = qc->dev; |
1da177e4 | 1517 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1518 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1519 | u64 block; |
1520 | u32 n_block; | |
1da177e4 LT |
1521 | |
1522 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1523 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1524 | |
2e5704f6 TH |
1525 | if (cdb[0] == VERIFY) { |
1526 | if (scmd->cmd_len < 10) | |
1527 | goto invalid_fld; | |
542b1444 | 1528 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1529 | } else if (cdb[0] == VERIFY_16) { |
1530 | if (scmd->cmd_len < 16) | |
1531 | goto invalid_fld; | |
542b1444 | 1532 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1533 | } else |
ae006510 | 1534 | goto invalid_fld; |
1da177e4 | 1535 | |
8bf62ece | 1536 | if (!n_block) |
ae006510 | 1537 | goto nothing_to_do; |
8bf62ece | 1538 | if (block >= dev_sectors) |
ae006510 | 1539 | goto out_of_range; |
8bf62ece | 1540 | if ((block + n_block) > dev_sectors) |
ae006510 | 1541 | goto out_of_range; |
1da177e4 | 1542 | |
07506697 AL |
1543 | if (dev->flags & ATA_DFLAG_LBA) { |
1544 | tf->flags |= ATA_TFLAG_LBA; | |
1545 | ||
c6a33e24 AL |
1546 | if (lba_28_ok(block, n_block)) { |
1547 | /* use LBA28 */ | |
1548 | tf->command = ATA_CMD_VERIFY; | |
1549 | tf->device |= (block >> 24) & 0xf; | |
1550 | } else if (lba_48_ok(block, n_block)) { | |
1551 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1552 | goto out_of_range; | |
07506697 AL |
1553 | |
1554 | /* use LBA48 */ | |
1555 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1556 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1557 | |
8bf62ece | 1558 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1559 | |
8bf62ece AL |
1560 | tf->hob_lbah = (block >> 40) & 0xff; |
1561 | tf->hob_lbam = (block >> 32) & 0xff; | |
1562 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1563 | } else |
1564 | /* request too large even for LBA48 */ | |
1565 | goto out_of_range; | |
8bf62ece AL |
1566 | |
1567 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1568 | |
8bf62ece AL |
1569 | tf->lbah = (block >> 16) & 0xff; |
1570 | tf->lbam = (block >> 8) & 0xff; | |
1571 | tf->lbal = block & 0xff; | |
1da177e4 | 1572 | |
8bf62ece AL |
1573 | tf->device |= ATA_LBA; |
1574 | } else { | |
1575 | /* CHS */ | |
1576 | u32 sect, head, cyl, track; | |
1577 | ||
c6a33e24 AL |
1578 | if (!lba_28_ok(block, n_block)) |
1579 | goto out_of_range; | |
07506697 | 1580 | |
8bf62ece AL |
1581 | /* Convert LBA to CHS */ |
1582 | track = (u32)block / dev->sectors; | |
1583 | cyl = track / dev->heads; | |
1584 | head = track % dev->heads; | |
1585 | sect = (u32)block % dev->sectors + 1; | |
1586 | ||
c187c4b5 AL |
1587 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1588 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1589 | |
1590 | /* Check whether the converted CHS can fit. | |
1591 | Cylinder: 0-65535 | |
8bf62ece AL |
1592 | Head: 0-15 |
1593 | Sector: 1-255*/ | |
2e9edbf8 | 1594 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1595 | goto out_of_range; |
2e9edbf8 | 1596 | |
8bf62ece AL |
1597 | tf->command = ATA_CMD_VERIFY; |
1598 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1599 | tf->lbal = sect; | |
1600 | tf->lbam = cyl; | |
1601 | tf->lbah = cyl >> 8; | |
1602 | tf->device |= head; | |
1603 | } | |
1da177e4 LT |
1604 | |
1605 | return 0; | |
ae006510 DG |
1606 | |
1607 | invalid_fld: | |
542b1444 | 1608 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1609 | /* "Invalid field in cbd" */ |
1610 | return 1; | |
1611 | ||
1612 | out_of_range: | |
542b1444 | 1613 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1614 | /* "Logical Block Address out of range" */ |
1615 | return 1; | |
1616 | ||
1617 | nothing_to_do: | |
542b1444 | 1618 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1619 | return 1; |
1da177e4 LT |
1620 | } |
1621 | ||
1622 | /** | |
1623 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1624 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1625 | * |
1626 | * Converts any of six SCSI read/write commands into the | |
1627 | * ATA counterpart, including starting sector (LBA), | |
1628 | * sector count, and taking into account the device's LBA48 | |
1629 | * support. | |
1630 | * | |
1631 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1632 | * %WRITE_16 are currently supported. | |
1633 | * | |
1634 | * LOCKING: | |
cca3974e | 1635 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1636 | * |
1637 | * RETURNS: | |
1638 | * Zero on success, non-zero on error. | |
1639 | */ | |
ad706991 | 1640 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1641 | { |
542b1444 | 1642 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1643 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1644 | unsigned int tf_flags = 0; |
3aef5231 AL |
1645 | u64 block; |
1646 | u32 n_block; | |
bd056d7e | 1647 | int rc; |
1da177e4 | 1648 | |
542b1444 | 1649 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1650 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1651 | |
9a3dccc4 | 1652 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1653 | switch (cdb[0]) { |
3aef5231 AL |
1654 | case READ_10: |
1655 | case WRITE_10: | |
2e5704f6 TH |
1656 | if (unlikely(scmd->cmd_len < 10)) |
1657 | goto invalid_fld; | |
542b1444 TH |
1658 | scsi_10_lba_len(cdb, &block, &n_block); |
1659 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1660 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1661 | break; |
1662 | case READ_6: | |
1663 | case WRITE_6: | |
2e5704f6 TH |
1664 | if (unlikely(scmd->cmd_len < 6)) |
1665 | goto invalid_fld; | |
542b1444 | 1666 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1667 | |
1668 | /* for 6-byte r/w commands, transfer length 0 | |
1669 | * means 256 blocks of data, not 0 block. | |
1670 | */ | |
76b2bf9b JG |
1671 | if (!n_block) |
1672 | n_block = 256; | |
3aef5231 AL |
1673 | break; |
1674 | case READ_16: | |
1675 | case WRITE_16: | |
2e5704f6 TH |
1676 | if (unlikely(scmd->cmd_len < 16)) |
1677 | goto invalid_fld; | |
542b1444 TH |
1678 | scsi_16_lba_len(cdb, &block, &n_block); |
1679 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1680 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1681 | break; |
1682 | default: | |
8bf62ece | 1683 | DPRINTK("no-byte command\n"); |
ae006510 | 1684 | goto invalid_fld; |
1da177e4 LT |
1685 | } |
1686 | ||
8bf62ece AL |
1687 | /* Check and compose ATA command */ |
1688 | if (!n_block) | |
c187c4b5 AL |
1689 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1690 | * length 0 means transfer 0 block of data. | |
1691 | * However, for ATA R/W commands, sector count 0 means | |
1692 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1693 | * |
1694 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1695 | */ |
ae006510 | 1696 | goto nothing_to_do; |
1da177e4 | 1697 | |
bd056d7e | 1698 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1699 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1700 | |
bd056d7e TH |
1701 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1702 | qc->tag); | |
1703 | if (likely(rc == 0)) | |
1704 | return 0; | |
ae006510 | 1705 | |
bd056d7e TH |
1706 | if (rc == -ERANGE) |
1707 | goto out_of_range; | |
1708 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1709 | invalid_fld: |
542b1444 | 1710 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1711 | /* "Invalid field in cbd" */ |
1712 | return 1; | |
1713 | ||
1714 | out_of_range: | |
542b1444 | 1715 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1716 | /* "Logical Block Address out of range" */ |
1717 | return 1; | |
1718 | ||
1719 | nothing_to_do: | |
542b1444 | 1720 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1721 | return 1; |
1da177e4 LT |
1722 | } |
1723 | ||
77853bf2 | 1724 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1725 | { |
c31f571d | 1726 | struct ata_port *ap = qc->ap; |
1da177e4 | 1727 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1728 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1729 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1730 | |
1731 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1732 | * user mandated it or if there's an error. Note that if we | |
1733 | * generate because the user forced us to, a check condition | |
1734 | * is generated and the ATA register values are returned | |
1735 | * whether the command completed successfully or not. If there | |
1736 | * was no error, SK, ASC and ASCQ will all be zero. | |
1737 | */ | |
a7dac447 | 1738 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1739 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1740 | ata_gen_passthru_sense(qc); |
b095518e JG |
1741 | } else { |
1742 | if (!need_sense) { | |
1743 | cmd->result = SAM_STAT_GOOD; | |
1744 | } else { | |
1745 | /* TODO: decide which descriptor format to use | |
1746 | * for 48b LBA devices and call that here | |
1747 | * instead of the fixed desc, which is only | |
1748 | * good for smaller LBA (and maybe CHS?) | |
1749 | * devices. | |
1750 | */ | |
750426aa | 1751 | ata_gen_ata_sense(qc); |
b095518e JG |
1752 | } |
1753 | } | |
1da177e4 | 1754 | |
c31f571d | 1755 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1756 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1757 | |
1758 | qc->scsidone(cmd); | |
1759 | ||
77853bf2 | 1760 | ata_qc_free(qc); |
1da177e4 LT |
1761 | } |
1762 | ||
1763 | /** | |
1764 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1765 | * @dev: ATA device to which the command is addressed |
1766 | * @cmd: SCSI command to execute | |
1767 | * @done: SCSI command completion function | |
1768 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1769 | * | |
1770 | * Our ->queuecommand() function has decided that the SCSI | |
1771 | * command issued can be directly translated into an ATA | |
1772 | * command, rather than handled internally. | |
1773 | * | |
1774 | * This function sets up an ata_queued_cmd structure for the | |
1775 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1776 | * | |
ae006510 DG |
1777 | * The xlat_func argument (actor) returns 0 if ready to execute |
1778 | * ATA command, else 1 to finish translation. If 1 is returned | |
1779 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1780 | * to be set reflecting an error condition or clean (early) | |
1781 | * termination. | |
1782 | * | |
1da177e4 | 1783 | * LOCKING: |
cca3974e | 1784 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1785 | * |
1786 | * RETURNS: | |
1787 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1788 | * needs to be deferred. | |
1da177e4 | 1789 | */ |
2115ea94 TH |
1790 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1791 | void (*done)(struct scsi_cmnd *), | |
1792 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1793 | { |
31cc23b3 | 1794 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1795 | struct ata_queued_cmd *qc; |
31cc23b3 | 1796 | int rc; |
1da177e4 LT |
1797 | |
1798 | VPRINTK("ENTER\n"); | |
1799 | ||
3373efd8 | 1800 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1801 | if (!qc) |
ae006510 | 1802 | goto err_mem; |
1da177e4 LT |
1803 | |
1804 | /* data is present; dma-map it */ | |
be7db055 | 1805 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1806 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1807 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1808 | ata_dev_printk(dev, KERN_WARNING, |
1809 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1810 | goto err_did; |
1da177e4 LT |
1811 | } |
1812 | ||
7120165c | 1813 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1814 | |
1815 | qc->dma_dir = cmd->sc_data_direction; | |
1816 | } | |
1817 | ||
1818 | qc->complete_fn = ata_scsi_qc_complete; | |
1819 | ||
ad706991 | 1820 | if (xlat_func(qc)) |
ae006510 | 1821 | goto early_finish; |
1da177e4 | 1822 | |
31cc23b3 TH |
1823 | if (ap->ops->qc_defer) { |
1824 | if ((rc = ap->ops->qc_defer(qc))) | |
1825 | goto defer; | |
1826 | } | |
1827 | ||
1da177e4 | 1828 | /* select device, send command to hardware */ |
8e0e694a | 1829 | ata_qc_issue(qc); |
1da177e4 LT |
1830 | |
1831 | VPRINTK("EXIT\n"); | |
2115ea94 | 1832 | return 0; |
1da177e4 | 1833 | |
ae006510 | 1834 | early_finish: |
2dcb407e | 1835 | ata_qc_free(qc); |
da071b42 | 1836 | qc->scsidone(cmd); |
ae006510 | 1837 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1838 | return 0; |
ae006510 DG |
1839 | |
1840 | err_did: | |
1da177e4 | 1841 | ata_qc_free(qc); |
ae006510 | 1842 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1843 | qc->scsidone(cmd); |
253b92ec | 1844 | err_mem: |
ae006510 | 1845 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1846 | return 0; |
3dc1d881 TH |
1847 | |
1848 | defer: | |
31cc23b3 | 1849 | ata_qc_free(qc); |
3dc1d881 | 1850 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1851 | if (rc == ATA_DEFER_LINK) |
1852 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1853 | else | |
1854 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1855 | } |
1856 | ||
1857 | /** | |
1858 | * ata_scsi_rbuf_get - Map response buffer. | |
ec2a20e6 | 1859 | * @cmd: SCSI command containing buffer to be mapped. |
87340e98 TH |
1860 | * @flags: unsigned long variable to store irq enable status |
1861 | * @copy_in: copy in from user buffer | |
1da177e4 | 1862 | * |
87340e98 | 1863 | * Prepare buffer for simulated SCSI commands. |
1da177e4 LT |
1864 | * |
1865 | * LOCKING: | |
87340e98 | 1866 | * spin_lock_irqsave(ata_scsi_rbuf_lock) on success |
1da177e4 LT |
1867 | * |
1868 | * RETURNS: | |
87340e98 | 1869 | * Pointer to response buffer. |
1da177e4 | 1870 | */ |
87340e98 TH |
1871 | static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, |
1872 | unsigned long *flags) | |
1da177e4 | 1873 | { |
87340e98 | 1874 | spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); |
1da177e4 | 1875 | |
87340e98 TH |
1876 | memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); |
1877 | if (copy_in) | |
1878 | sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1879 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1880 | return ata_scsi_rbuf; | |
1da177e4 LT |
1881 | } |
1882 | ||
1883 | /** | |
1884 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1885 | * @cmd: SCSI command containing buffer to be unmapped. | |
87340e98 TH |
1886 | * @copy_out: copy out result |
1887 | * @flags: @flags passed to ata_scsi_rbuf_get() | |
1da177e4 | 1888 | * |
87340e98 TH |
1889 | * Returns rbuf buffer. The result is copied to @cmd's buffer if |
1890 | * @copy_back is true. | |
1da177e4 LT |
1891 | * |
1892 | * LOCKING: | |
87340e98 | 1893 | * Unlocks ata_scsi_rbuf_lock. |
1da177e4 | 1894 | */ |
87340e98 TH |
1895 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, |
1896 | unsigned long *flags) | |
1da177e4 | 1897 | { |
87340e98 TH |
1898 | if (copy_out) |
1899 | sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1900 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1901 | spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); | |
1da177e4 LT |
1902 | } |
1903 | ||
1904 | /** | |
1905 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1906 | * @args: device IDENTIFY data / SCSI command of interest. | |
1907 | * @actor: Callback hook for desired SCSI command simulator | |
1908 | * | |
1909 | * Takes care of the hard work of simulating a SCSI command... | |
1910 | * Mapping the response buffer, calling the command's handler, | |
1911 | * and handling the handler's return value. This return value | |
1912 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1913 | * completed successfully (0), or not (in which case cmd->result |
1914 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1915 | * |
1916 | * LOCKING: | |
cca3974e | 1917 | * spin_lock_irqsave(host lock) |
1da177e4 | 1918 | */ |
f0761be3 | 1919 | static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, |
87340e98 | 1920 | unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) |
1da177e4 LT |
1921 | { |
1922 | u8 *rbuf; | |
87340e98 | 1923 | unsigned int rc; |
1da177e4 | 1924 | struct scsi_cmnd *cmd = args->cmd; |
b445c568 JG |
1925 | unsigned long flags; |
1926 | ||
87340e98 TH |
1927 | rbuf = ata_scsi_rbuf_get(cmd, false, &flags); |
1928 | rc = actor(args, rbuf); | |
1929 | ata_scsi_rbuf_put(cmd, rc == 0, &flags); | |
b445c568 | 1930 | |
ae006510 | 1931 | if (rc == 0) |
1da177e4 | 1932 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1933 | args->done(cmd); |
1da177e4 LT |
1934 | } |
1935 | ||
1936 | /** | |
1937 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1938 | * @args: device IDENTIFY data / SCSI command of interest. | |
1939 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1940 | * |
1941 | * Returns standard device identification data associated | |
b142eb65 | 1942 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1943 | * |
1944 | * LOCKING: | |
cca3974e | 1945 | * spin_lock_irqsave(host lock) |
1da177e4 | 1946 | */ |
87340e98 | 1947 | static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 1948 | { |
87340e98 TH |
1949 | const u8 versions[] = { |
1950 | 0x60, /* SAM-3 (no version claimed) */ | |
1951 | ||
1952 | 0x03, | |
1953 | 0x20, /* SBC-2 (no version claimed) */ | |
1954 | ||
1955 | 0x02, | |
1956 | 0x60 /* SPC-3 (no version claimed) */ | |
1957 | }; | |
1da177e4 LT |
1958 | u8 hdr[] = { |
1959 | TYPE_DISK, | |
1960 | 0, | |
1961 | 0x5, /* claim SPC-3 version compatibility */ | |
1962 | 2, | |
1963 | 95 - 4 | |
1964 | }; | |
1965 | ||
87340e98 TH |
1966 | VPRINTK("ENTER\n"); |
1967 | ||
1da177e4 LT |
1968 | /* set scsi removeable (RMB) bit per ata bit */ |
1969 | if (ata_id_removeable(args->id)) | |
1970 | hdr[1] |= (1 << 7); | |
1971 | ||
1da177e4 | 1972 | memcpy(rbuf, hdr, sizeof(hdr)); |
87340e98 TH |
1973 | memcpy(&rbuf[8], "ATA ", 8); |
1974 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); | |
1975 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 | 1976 | |
87340e98 TH |
1977 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1978 | memcpy(&rbuf[32], "n/a ", 4); | |
1da177e4 | 1979 | |
87340e98 | 1980 | memcpy(rbuf + 59, versions, sizeof(versions)); |
1da177e4 LT |
1981 | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | /** | |
b142eb65 | 1986 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1987 | * @args: device IDENTIFY data / SCSI command of interest. |
1988 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 1989 | * |
b142eb65 | 1990 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1991 | * |
1992 | * LOCKING: | |
cca3974e | 1993 | * spin_lock_irqsave(host lock) |
1da177e4 | 1994 | */ |
87340e98 | 1995 | static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
1996 | { |
1997 | const u8 pages[] = { | |
1998 | 0x00, /* page 0x00, this page */ | |
1999 | 0x80, /* page 0x80, unit serial no page */ | |
1e9dbc92 MW |
2000 | 0x83, /* page 0x83, device ident page */ |
2001 | 0x89, /* page 0x89, ata info page */ | |
18f0f978 | 2002 | 0xb0, /* page 0xb0, block limits page */ |
1e9dbc92 | 2003 | 0xb1, /* page 0xb1, block device characteristics page */ |
1da177e4 | 2004 | }; |
1da177e4 | 2005 | |
87340e98 TH |
2006 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
2007 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1da177e4 LT |
2008 | return 0; |
2009 | } | |
2010 | ||
2011 | /** | |
b142eb65 | 2012 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
2013 | * @args: device IDENTIFY data / SCSI command of interest. |
2014 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2015 | * |
2016 | * Returns ATA device serial number. | |
2017 | * | |
2018 | * LOCKING: | |
cca3974e | 2019 | * spin_lock_irqsave(host lock) |
1da177e4 | 2020 | */ |
87340e98 | 2021 | static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2022 | { |
2023 | const u8 hdr[] = { | |
2024 | 0, | |
2025 | 0x80, /* this page code */ | |
2026 | 0, | |
a0cf733b | 2027 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 | 2028 | }; |
1da177e4 | 2029 | |
87340e98 TH |
2030 | memcpy(rbuf, hdr, sizeof(hdr)); |
2031 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
2032 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1da177e4 LT |
2033 | return 0; |
2034 | } | |
2035 | ||
1da177e4 | 2036 | /** |
b142eb65 | 2037 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
2038 | * @args: device IDENTIFY data / SCSI command of interest. |
2039 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2040 | * |
b142eb65 JG |
2041 | * Yields two logical unit device identification designators: |
2042 | * - vendor specific ASCII containing the ATA serial number | |
2043 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
2044 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
2045 | * |
2046 | * LOCKING: | |
cca3974e | 2047 | * spin_lock_irqsave(host lock) |
1da177e4 | 2048 | */ |
87340e98 | 2049 | static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2050 | { |
b142eb65 | 2051 | const int sat_model_serial_desc_len = 68; |
87340e98 | 2052 | int num; |
1da177e4 | 2053 | |
b142eb65 JG |
2054 | rbuf[1] = 0x83; /* this page code */ |
2055 | num = 4; | |
2056 | ||
87340e98 TH |
2057 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2058 | rbuf[num + 0] = 2; | |
2059 | rbuf[num + 3] = ATA_ID_SERNO_LEN; | |
2060 | num += 4; | |
2061 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
2062 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
2063 | num += ATA_ID_SERNO_LEN; | |
2064 | ||
2065 | /* SAT defined lu model and serial numbers descriptor */ | |
2066 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2067 | rbuf[num + 0] = 2; | |
2068 | rbuf[num + 1] = 1; | |
2069 | rbuf[num + 3] = sat_model_serial_desc_len; | |
2070 | num += 4; | |
2071 | memcpy(rbuf + num, "ATA ", 8); | |
2072 | num += 8; | |
2073 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, | |
2074 | ATA_ID_PROD_LEN); | |
2075 | num += ATA_ID_PROD_LEN; | |
2076 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, | |
2077 | ATA_ID_SERNO_LEN); | |
2078 | num += ATA_ID_SERNO_LEN; | |
2079 | ||
b142eb65 | 2080 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ |
1da177e4 LT |
2081 | return 0; |
2082 | } | |
2083 | ||
ad355b46 JG |
2084 | /** |
2085 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
2086 | * @args: device IDENTIFY data / SCSI command of interest. | |
2087 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
ad355b46 JG |
2088 | * |
2089 | * Yields SAT-specified ATA VPD page. | |
2090 | * | |
2091 | * LOCKING: | |
2092 | * spin_lock_irqsave(host lock) | |
2093 | */ | |
87340e98 | 2094 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) |
ad355b46 | 2095 | { |
ad355b46 | 2096 | struct ata_taskfile tf; |
ad355b46 | 2097 | |
ad355b46 JG |
2098 | memset(&tf, 0, sizeof(tf)); |
2099 | ||
87340e98 TH |
2100 | rbuf[1] = 0x89; /* our page code */ |
2101 | rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
2102 | rbuf[3] = (0x238 & 0xff); | |
ad355b46 | 2103 | |
87340e98 TH |
2104 | memcpy(&rbuf[8], "linux ", 8); |
2105 | memcpy(&rbuf[16], "libata ", 16); | |
2106 | memcpy(&rbuf[32], DRV_VERSION, 4); | |
2107 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
ad355b46 JG |
2108 | |
2109 | /* we don't store the ATA device signature, so we fake it */ | |
2110 | ||
2111 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
2112 | tf.lbal = 0x1; | |
2113 | tf.nsect = 0x1; | |
2114 | ||
87340e98 TH |
2115 | ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ |
2116 | rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
ad355b46 | 2117 | |
87340e98 | 2118 | rbuf[56] = ATA_CMD_ID_ATA; |
ad355b46 | 2119 | |
87340e98 | 2120 | memcpy(&rbuf[60], &args->id[0], 512); |
ad355b46 JG |
2121 | return 0; |
2122 | } | |
2123 | ||
18f0f978 CH |
2124 | static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) |
2125 | { | |
2126 | u32 min_io_sectors; | |
2127 | ||
2128 | rbuf[1] = 0xb0; | |
2129 | rbuf[3] = 0x3c; /* required VPD size with unmap support */ | |
2130 | ||
2131 | /* | |
2132 | * Optimal transfer length granularity. | |
2133 | * | |
2134 | * This is always one physical block, but for disks with a smaller | |
2135 | * logical than physical sector size we need to figure out what the | |
2136 | * latter is. | |
2137 | */ | |
2138 | if (ata_id_has_large_logical_sectors(args->id)) | |
2139 | min_io_sectors = ata_id_logical_per_physical_sectors(args->id); | |
2140 | else | |
2141 | min_io_sectors = 1; | |
2142 | put_unaligned_be16(min_io_sectors, &rbuf[6]); | |
2143 | ||
2144 | /* | |
2145 | * Optimal unmap granularity. | |
2146 | * | |
2147 | * The ATA spec doesn't even know about a granularity or alignment | |
2148 | * for the TRIM command. We can leave away most of the unmap related | |
2149 | * VPD page entries, but we have specifify a granularity to signal | |
2150 | * that we support some form of unmap - in thise case via WRITE SAME | |
2151 | * with the unmap bit set. | |
2152 | */ | |
e78db4df MP |
2153 | if (ata_id_has_trim(args->id)) { |
2154 | put_unaligned_be32(65535 * 512 / 8, &rbuf[20]); | |
18f0f978 | 2155 | put_unaligned_be32(1, &rbuf[28]); |
e78db4df | 2156 | } |
18f0f978 CH |
2157 | |
2158 | return 0; | |
2159 | } | |
2160 | ||
1e9dbc92 MW |
2161 | static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) |
2162 | { | |
4bca3286 MP |
2163 | int form_factor = ata_id_form_factor(args->id); |
2164 | int media_rotation_rate = ata_id_rotation_rate(args->id); | |
2165 | ||
1e9dbc92 MW |
2166 | rbuf[1] = 0xb1; |
2167 | rbuf[3] = 0x3c; | |
4bca3286 MP |
2168 | rbuf[4] = media_rotation_rate >> 8; |
2169 | rbuf[5] = media_rotation_rate; | |
2170 | rbuf[7] = form_factor; | |
1e9dbc92 MW |
2171 | |
2172 | return 0; | |
2173 | } | |
2174 | ||
1da177e4 | 2175 | /** |
0cba632b | 2176 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
2177 | * @args: device IDENTIFY data / SCSI command of interest. |
2178 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2179 | * |
2180 | * No operation. Simply returns success to caller, to indicate | |
2181 | * that the caller should successfully complete this SCSI command. | |
2182 | * | |
2183 | * LOCKING: | |
cca3974e | 2184 | * spin_lock_irqsave(host lock) |
1da177e4 | 2185 | */ |
87340e98 | 2186 | static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2187 | { |
2188 | VPRINTK("ENTER\n"); | |
2189 | return 0; | |
2190 | } | |
2191 | ||
1da177e4 LT |
2192 | /** |
2193 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2194 | * @id: device IDENTIFY data | |
87340e98 | 2195 | * @buf: output buffer |
1da177e4 LT |
2196 | * |
2197 | * Generate a caching info page, which conditionally indicates | |
2198 | * write caching to the SCSI layer, depending on device | |
2199 | * capabilities. | |
2200 | * | |
2201 | * LOCKING: | |
2202 | * None. | |
2203 | */ | |
87340e98 | 2204 | static unsigned int ata_msense_caching(u16 *id, u8 *buf) |
1da177e4 | 2205 | { |
87340e98 | 2206 | memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); |
1da177e4 | 2207 | if (ata_id_wcache_enabled(id)) |
87340e98 | 2208 | buf[2] |= (1 << 2); /* write cache enable */ |
1da177e4 | 2209 | if (!ata_id_rahead_enabled(id)) |
87340e98 TH |
2210 | buf[12] |= (1 << 5); /* disable read ahead */ |
2211 | return sizeof(def_cache_mpage); | |
1da177e4 LT |
2212 | } |
2213 | ||
2214 | /** | |
2215 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
87340e98 | 2216 | * @buf: output buffer |
1da177e4 LT |
2217 | * |
2218 | * Generate a generic MODE SENSE control mode page. | |
2219 | * | |
2220 | * LOCKING: | |
2221 | * None. | |
2222 | */ | |
87340e98 | 2223 | static unsigned int ata_msense_ctl_mode(u8 *buf) |
1da177e4 | 2224 | { |
87340e98 | 2225 | memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); |
00ac37f5 | 2226 | return sizeof(def_control_mpage); |
1da177e4 LT |
2227 | } |
2228 | ||
2229 | /** | |
2230 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
ec2a20e6 | 2231 | * @buf: output buffer |
1da177e4 LT |
2232 | * |
2233 | * Generate a generic MODE SENSE r/w error recovery page. | |
2234 | * | |
2235 | * LOCKING: | |
2236 | * None. | |
2237 | */ | |
87340e98 | 2238 | static unsigned int ata_msense_rw_recovery(u8 *buf) |
1da177e4 | 2239 | { |
87340e98 | 2240 | memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); |
00ac37f5 | 2241 | return sizeof(def_rw_recovery_mpage); |
1da177e4 LT |
2242 | } |
2243 | ||
48bdc8ec JA |
2244 | /* |
2245 | * We can turn this into a real blacklist if it's needed, for now just | |
2246 | * blacklist any Maxtor BANC1G10 revision firmware | |
2247 | */ | |
2248 | static int ata_dev_supports_fua(u16 *id) | |
2249 | { | |
a0cf733b | 2250 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2251 | |
c3c013a2 JG |
2252 | if (!libata_fua) |
2253 | return 0; | |
48bdc8ec JA |
2254 | if (!ata_id_has_fua(id)) |
2255 | return 0; | |
2256 | ||
a0cf733b TH |
2257 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2258 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2259 | |
2e02671d | 2260 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2261 | return 1; |
2e02671d | 2262 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2263 | return 1; |
2264 | ||
2265 | return 0; /* blacklisted */ | |
2266 | } | |
2267 | ||
1da177e4 LT |
2268 | /** |
2269 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2270 | * @args: device IDENTIFY data / SCSI command of interest. | |
2271 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2272 | * |
00ac37f5 DG |
2273 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2274 | * access devices (e.g. disks) only. There should be no block | |
2275 | * descriptor for other device types. | |
1da177e4 LT |
2276 | * |
2277 | * LOCKING: | |
cca3974e | 2278 | * spin_lock_irqsave(host lock) |
1da177e4 | 2279 | */ |
87340e98 | 2280 | static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2281 | { |
9a3dccc4 | 2282 | struct ata_device *dev = args->dev; |
87340e98 | 2283 | u8 *scsicmd = args->cmd->cmnd, *p = rbuf; |
00ac37f5 DG |
2284 | const u8 sat_blk_desc[] = { |
2285 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2286 | 0, | |
2287 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2288 | }; | |
2289 | u8 pg, spg; | |
87340e98 | 2290 | unsigned int ebd, page_control, six_byte; |
9a3dccc4 | 2291 | u8 dpofua; |
1da177e4 LT |
2292 | |
2293 | VPRINTK("ENTER\n"); | |
2294 | ||
2295 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2296 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2297 | /* | |
2298 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2299 | */ |
00ac37f5 | 2300 | |
1da177e4 | 2301 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2302 | switch (page_control) { |
2303 | case 0: /* current */ | |
2304 | break; /* supported */ | |
2305 | case 3: /* saved */ | |
2306 | goto saving_not_supp; | |
2307 | case 1: /* changeable */ | |
2308 | case 2: /* defaults */ | |
2309 | default: | |
2310 | goto invalid_fld; | |
2311 | } | |
1da177e4 | 2312 | |
87340e98 TH |
2313 | if (six_byte) |
2314 | p += 4 + (ebd ? 8 : 0); | |
2315 | else | |
2316 | p += 8 + (ebd ? 8 : 0); | |
1da177e4 | 2317 | |
00ac37f5 DG |
2318 | pg = scsicmd[2] & 0x3f; |
2319 | spg = scsicmd[3]; | |
2320 | /* | |
2321 | * No mode subpages supported (yet) but asking for _all_ | |
2322 | * subpages may be valid | |
2323 | */ | |
2324 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2325 | goto invalid_fld; | |
2326 | ||
2327 | switch(pg) { | |
2328 | case RW_RECOVERY_MPAGE: | |
87340e98 | 2329 | p += ata_msense_rw_recovery(p); |
1da177e4 LT |
2330 | break; |
2331 | ||
00ac37f5 | 2332 | case CACHE_MPAGE: |
87340e98 | 2333 | p += ata_msense_caching(args->id, p); |
1da177e4 LT |
2334 | break; |
2335 | ||
87340e98 TH |
2336 | case CONTROL_MPAGE: |
2337 | p += ata_msense_ctl_mode(p); | |
1da177e4 | 2338 | break; |
1da177e4 | 2339 | |
00ac37f5 | 2340 | case ALL_MPAGES: |
87340e98 TH |
2341 | p += ata_msense_rw_recovery(p); |
2342 | p += ata_msense_caching(args->id, p); | |
2343 | p += ata_msense_ctl_mode(p); | |
1da177e4 LT |
2344 | break; |
2345 | ||
2346 | default: /* invalid page code */ | |
ae006510 | 2347 | goto invalid_fld; |
1da177e4 LT |
2348 | } |
2349 | ||
9a3dccc4 | 2350 | dpofua = 0; |
f79d409f | 2351 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2352 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2353 | dpofua = 1 << 4; | |
2354 | ||
1da177e4 | 2355 | if (six_byte) { |
87340e98 TH |
2356 | rbuf[0] = p - rbuf - 1; |
2357 | rbuf[2] |= dpofua; | |
00ac37f5 | 2358 | if (ebd) { |
87340e98 TH |
2359 | rbuf[3] = sizeof(sat_blk_desc); |
2360 | memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2361 | } |
1da177e4 | 2362 | } else { |
87340e98 TH |
2363 | unsigned int output_len = p - rbuf - 2; |
2364 | ||
1da177e4 | 2365 | rbuf[0] = output_len >> 8; |
87340e98 TH |
2366 | rbuf[1] = output_len; |
2367 | rbuf[3] |= dpofua; | |
00ac37f5 | 2368 | if (ebd) { |
87340e98 TH |
2369 | rbuf[7] = sizeof(sat_blk_desc); |
2370 | memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2371 | } |
1da177e4 | 2372 | } |
1da177e4 | 2373 | return 0; |
ae006510 DG |
2374 | |
2375 | invalid_fld: | |
2376 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2377 | /* "Invalid field in cbd" */ | |
2378 | return 1; | |
2379 | ||
2380 | saving_not_supp: | |
2381 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2382 | /* "Saving parameters not supported" */ | |
2383 | return 1; | |
1da177e4 LT |
2384 | } |
2385 | ||
2386 | /** | |
2387 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2388 | * @args: device IDENTIFY data / SCSI command of interest. | |
2389 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2390 | * |
2391 | * Simulate READ CAPACITY commands. | |
2392 | * | |
2393 | * LOCKING: | |
6a36261e | 2394 | * None. |
1da177e4 | 2395 | */ |
87340e98 | 2396 | static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2397 | { |
61d79a8e MP |
2398 | struct ata_device *dev = args->dev; |
2399 | u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ | |
2400 | u8 log_per_phys = 0; | |
2401 | u16 lowest_aligned = 0; | |
2402 | u16 word_106 = dev->id[106]; | |
2403 | u16 word_209 = dev->id[209]; | |
2404 | ||
2405 | if ((word_106 & 0xc000) == 0x4000) { | |
2406 | /* Number and offset of logical sectors per physical sector */ | |
2407 | if (word_106 & (1 << 13)) | |
2408 | log_per_phys = word_106 & 0xf; | |
2409 | if ((word_209 & 0xc000) == 0x4000) { | |
2410 | u16 first = dev->id[209] & 0x3fff; | |
2411 | if (first > 0) | |
2412 | lowest_aligned = (1 << log_per_phys) - first; | |
2413 | } | |
2414 | } | |
1da177e4 LT |
2415 | |
2416 | VPRINTK("ENTER\n"); | |
2417 | ||
1da177e4 | 2418 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2419 | if (last_lba >= 0xffffffffULL) |
2420 | last_lba = 0xffffffff; | |
0c144d0d | 2421 | |
1da177e4 | 2422 | /* sector count, 32-bit */ |
87340e98 TH |
2423 | rbuf[0] = last_lba >> (8 * 3); |
2424 | rbuf[1] = last_lba >> (8 * 2); | |
2425 | rbuf[2] = last_lba >> (8 * 1); | |
2426 | rbuf[3] = last_lba; | |
1da177e4 LT |
2427 | |
2428 | /* sector size */ | |
87340e98 TH |
2429 | rbuf[6] = ATA_SECT_SIZE >> 8; |
2430 | rbuf[7] = ATA_SECT_SIZE & 0xff; | |
1da177e4 LT |
2431 | } else { |
2432 | /* sector count, 64-bit */ | |
87340e98 TH |
2433 | rbuf[0] = last_lba >> (8 * 7); |
2434 | rbuf[1] = last_lba >> (8 * 6); | |
2435 | rbuf[2] = last_lba >> (8 * 5); | |
2436 | rbuf[3] = last_lba >> (8 * 4); | |
2437 | rbuf[4] = last_lba >> (8 * 3); | |
2438 | rbuf[5] = last_lba >> (8 * 2); | |
2439 | rbuf[6] = last_lba >> (8 * 1); | |
2440 | rbuf[7] = last_lba; | |
1da177e4 LT |
2441 | |
2442 | /* sector size */ | |
87340e98 TH |
2443 | rbuf[10] = ATA_SECT_SIZE >> 8; |
2444 | rbuf[11] = ATA_SECT_SIZE & 0xff; | |
61d79a8e MP |
2445 | |
2446 | rbuf[12] = 0; | |
2447 | rbuf[13] = log_per_phys; | |
2448 | rbuf[14] = (lowest_aligned >> 8) & 0x3f; | |
2449 | rbuf[15] = lowest_aligned; | |
18f0f978 | 2450 | |
e78db4df MP |
2451 | if (ata_id_has_trim(args->id)) { |
2452 | rbuf[14] |= 0x80; /* TPE */ | |
2453 | ||
2454 | if (ata_id_has_zero_after_trim(args->id)) | |
2455 | rbuf[14] |= 0x40; /* TPRZ */ | |
2456 | } | |
1da177e4 LT |
2457 | } |
2458 | ||
2459 | return 0; | |
2460 | } | |
2461 | ||
2462 | /** | |
2463 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2464 | * @args: device IDENTIFY data / SCSI command of interest. | |
2465 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2466 | * |
2467 | * Simulate REPORT LUNS command. | |
2468 | * | |
2469 | * LOCKING: | |
cca3974e | 2470 | * spin_lock_irqsave(host lock) |
1da177e4 | 2471 | */ |
87340e98 | 2472 | static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2473 | { |
2474 | VPRINTK("ENTER\n"); | |
2475 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2476 | ||
2477 | return 0; | |
2478 | } | |
2479 | ||
77853bf2 | 2480 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2481 | { |
74e6c8c3 | 2482 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2483 | /* FIXME: not quite right; we don't want the |
2484 | * translation of taskfile registers into | |
2485 | * a sense descriptors, since that's only | |
2486 | * correct for ATA, not ATAPI | |
2487 | */ | |
750426aa | 2488 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2489 | } |
a939c963 | 2490 | |
c6e6e666 | 2491 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2492 | ata_qc_free(qc); |
c6e6e666 | 2493 | } |
a939c963 | 2494 | |
c6e6e666 JG |
2495 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2496 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2497 | { | |
2498 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2499 | } | |
2500 | ||
2501 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2502 | { | |
2503 | struct ata_port *ap = qc->ap; | |
2504 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2505 | ||
2506 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2507 | |
2508 | /* FIXME: is this needed? */ | |
7ccd720d | 2509 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2510 | |
127102ae | 2511 | #ifdef CONFIG_ATA_SFF |
855d854a JB |
2512 | if (ap->ops->sff_tf_read) |
2513 | ap->ops->sff_tf_read(ap, &qc->tf); | |
127102ae | 2514 | #endif |
c6e6e666 JG |
2515 | |
2516 | /* fill these in, for the case where they are -not- overwritten */ | |
2517 | cmd->sense_buffer[0] = 0x70; | |
2518 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2519 | ||
2520 | ata_qc_reinit(qc); | |
2521 | ||
93f8fecb | 2522 | /* setup sg table and init transfer direction */ |
cadb7345 | 2523 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2524 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2525 | qc->dma_dir = DMA_FROM_DEVICE; |
2526 | ||
6e7846e9 | 2527 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2528 | qc->cdb[0] = REQUEST_SENSE; |
2529 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2530 | ||
2531 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2532 | qc->tf.command = ATA_CMD_PACKET; | |
2533 | ||
c6e6e666 | 2534 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2535 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2536 | qc->tf.feature |= ATAPI_PKT_DMA; |
2537 | } else { | |
0dc36888 | 2538 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2539 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2540 | qc->tf.lbah = 0; | |
c6e6e666 | 2541 | } |
a939c963 JG |
2542 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2543 | ||
c6e6e666 | 2544 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2545 | |
8e0e694a | 2546 | ata_qc_issue(qc); |
a939c963 JG |
2547 | |
2548 | DPRINTK("EXIT\n"); | |
2549 | } | |
2550 | ||
77853bf2 | 2551 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2552 | { |
2553 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2554 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2555 | |
a7dac447 | 2556 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2557 | |
246619da TH |
2558 | /* handle completion from new EH */ |
2559 | if (unlikely(qc->ap->ops->error_handler && | |
2560 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2561 | ||
2562 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2563 | /* FIXME: not quite right; we don't want the | |
2564 | * translation of taskfile registers into a | |
2565 | * sense descriptors, since that's only | |
2566 | * correct for ATA, not ATAPI | |
2567 | */ | |
750426aa | 2568 | ata_gen_passthru_sense(qc); |
246619da TH |
2569 | } |
2570 | ||
22aac089 TH |
2571 | /* SCSI EH automatically locks door if sdev->locked is |
2572 | * set. Sometimes door lock request continues to | |
2573 | * fail, for example, when no media is present. This | |
2574 | * creates a loop - SCSI EH issues door lock which | |
2575 | * fails and gets invoked again to acquire sense data | |
2576 | * for the failed command. | |
2577 | * | |
2578 | * If door lock fails, always clear sdev->locked to | |
2579 | * avoid this infinite loop. | |
2580 | */ | |
2581 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2582 | qc->dev->sdev->locked = 0; | |
2583 | ||
246619da TH |
2584 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2585 | qc->scsidone(cmd); | |
2586 | ata_qc_free(qc); | |
2587 | return; | |
2588 | } | |
2589 | ||
2590 | /* successful completion or old EH failure path */ | |
a7dac447 | 2591 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2592 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2593 | atapi_request_sense(qc); |
77853bf2 | 2594 | return; |
74e6c8c3 | 2595 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2596 | /* FIXME: not quite right; we don't want the |
2597 | * translation of taskfile registers into | |
2598 | * a sense descriptors, since that's only | |
2599 | * correct for ATA, not ATAPI | |
2600 | */ | |
750426aa | 2601 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2602 | } else { |
1da177e4 LT |
2603 | u8 *scsicmd = cmd->cmnd; |
2604 | ||
fd71da46 | 2605 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
b445c568 | 2606 | unsigned long flags; |
87340e98 | 2607 | u8 *buf; |
b445c568 | 2608 | |
87340e98 | 2609 | buf = ata_scsi_rbuf_get(cmd, true, &flags); |
a15dbeb4 JG |
2610 | |
2611 | /* ATAPI devices typically report zero for their SCSI version, | |
2612 | * and sometimes deviate from the spec WRT response data | |
2613 | * format. If SCSI version is reported as zero like normal, | |
2614 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2615 | * to indicate to the Linux scsi midlayer this is a modern | |
2616 | * device. 2) Ensure response data format / ATAPI information | |
2617 | * are always correct. | |
a15dbeb4 JG |
2618 | */ |
2619 | if (buf[2] == 0) { | |
2620 | buf[2] = 0x5; | |
2621 | buf[3] = 0x32; | |
2622 | } | |
2623 | ||
87340e98 | 2624 | ata_scsi_rbuf_put(cmd, true, &flags); |
1da177e4 | 2625 | } |
a15dbeb4 | 2626 | |
1da177e4 LT |
2627 | cmd->result = SAM_STAT_GOOD; |
2628 | } | |
2629 | ||
2630 | qc->scsidone(cmd); | |
77853bf2 | 2631 | ata_qc_free(qc); |
1da177e4 LT |
2632 | } |
2633 | /** | |
2634 | * atapi_xlat - Initialize PACKET taskfile | |
2635 | * @qc: command structure to be initialized | |
1da177e4 LT |
2636 | * |
2637 | * LOCKING: | |
cca3974e | 2638 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2639 | * |
2640 | * RETURNS: | |
2641 | * Zero on success, non-zero on failure. | |
2642 | */ | |
ad706991 | 2643 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2644 | { |
542b1444 | 2645 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 2646 | struct ata_device *dev = qc->dev; |
542b1444 | 2647 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
5895ef9a | 2648 | int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); |
2db78dd3 | 2649 | unsigned int nbytes; |
1da177e4 | 2650 | |
2e5704f6 TH |
2651 | memset(qc->cdb, 0, dev->cdb_len); |
2652 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2653 | |
2654 | qc->complete_fn = atapi_qc_complete; | |
2655 | ||
2656 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2657 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2658 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2659 | DPRINTK("direction: write\n"); | |
2660 | } | |
2661 | ||
2662 | qc->tf.command = ATA_CMD_PACKET; | |
aacda375 | 2663 | ata_qc_set_pc_nbytes(qc); |
e00f1ff3 TH |
2664 | |
2665 | /* check whether ATAPI DMA is safe */ | |
5895ef9a | 2666 | if (!nodata && !using_pio && atapi_check_dma(qc)) |
e00f1ff3 | 2667 | using_pio = 1; |
1da177e4 | 2668 | |
e190222d TH |
2669 | /* Some controller variants snoop this value for Packet |
2670 | * transfers to do state machine and FIFO management. Thus we | |
2671 | * want to set it properly, and for DMA where it is | |
2672 | * effectively meaningless. | |
2673 | */ | |
aacda375 | 2674 | nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); |
2db78dd3 | 2675 | |
e190222d TH |
2676 | /* Most ATAPI devices which honor transfer chunk size don't |
2677 | * behave according to the spec when odd chunk size which | |
2678 | * matches the transfer length is specified. If the number of | |
2679 | * bytes to transfer is 2n+1. According to the spec, what | |
2680 | * should happen is to indicate that 2n+1 is going to be | |
2681 | * transferred and transfer 2n+2 bytes where the last byte is | |
2682 | * padding. | |
2683 | * | |
2684 | * In practice, this doesn't happen. ATAPI devices first | |
2685 | * indicate and transfer 2n bytes and then indicate and | |
2686 | * transfer 2 bytes where the last byte is padding. | |
2687 | * | |
2688 | * This inconsistency confuses several controllers which | |
2689 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2690 | * These controllers use actual number of transferred bytes to | |
2691 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2692 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2693 | * FISes are aligned to 4 bytes. This causes data corruption | |
2694 | * and buffer overrun. | |
2695 | * | |
2696 | * Always setting nbytes to even number solves this problem | |
2697 | * because then ATAPI devices don't have to split data at 2n | |
2698 | * boundaries. | |
2699 | */ | |
2700 | if (nbytes & 0x1) | |
2701 | nbytes++; | |
2702 | ||
2db78dd3 AC |
2703 | qc->tf.lbam = (nbytes & 0xFF); |
2704 | qc->tf.lbah = (nbytes >> 8); | |
2705 | ||
5895ef9a TH |
2706 | if (nodata) |
2707 | qc->tf.protocol = ATAPI_PROT_NODATA; | |
2708 | else if (using_pio) | |
2709 | qc->tf.protocol = ATAPI_PROT_PIO; | |
2710 | else { | |
e00f1ff3 | 2711 | /* DMA data xfer */ |
0dc36888 | 2712 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2713 | qc->tf.feature |= ATAPI_PKT_DMA; |
2714 | ||
91163006 TH |
2715 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2716 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2717 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2718 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2719 | } |
2720 | ||
2db78dd3 AC |
2721 | |
2722 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2723 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2724 | return 0; |
2725 | } | |
2726 | ||
2dcb407e | 2727 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2728 | { |
071f44b1 | 2729 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2730 | if (likely(devno < ata_link_max_devices(&ap->link))) |
2731 | return &ap->link.device[devno]; | |
2732 | } else { | |
2733 | if (likely(devno < ap->nr_pmp_links)) | |
2734 | return &ap->pmp_link[devno].device[0]; | |
2735 | } | |
2736 | ||
ab5b3a5b TH |
2737 | return NULL; |
2738 | } | |
2739 | ||
2dcb407e JG |
2740 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2741 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2742 | { |
41bda9c9 TH |
2743 | int devno; |
2744 | ||
ab5b3a5b | 2745 | /* skip commands not addressed to targets we simulate */ |
071f44b1 | 2746 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2747 | if (unlikely(scsidev->channel || scsidev->lun)) |
2748 | return NULL; | |
2749 | devno = scsidev->id; | |
2750 | } else { | |
2751 | if (unlikely(scsidev->id || scsidev->lun)) | |
2752 | return NULL; | |
2753 | devno = scsidev->channel; | |
2754 | } | |
ab5b3a5b | 2755 | |
41bda9c9 | 2756 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2757 | } |
2758 | ||
1da177e4 LT |
2759 | /** |
2760 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2761 | * @ap: ATA port to which the device is attached | |
2762 | * @scsidev: SCSI device from which we derive the ATA device | |
2763 | * | |
2764 | * Given various information provided in struct scsi_cmnd, | |
2765 | * map that onto an ATA bus, and using that mapping | |
2766 | * determine which ata_device is associated with the | |
2767 | * SCSI command to be sent. | |
2768 | * | |
2769 | * LOCKING: | |
cca3974e | 2770 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2771 | * |
2772 | * RETURNS: | |
2773 | * Associated ATA device, or %NULL if not found. | |
2774 | */ | |
1da177e4 | 2775 | static struct ata_device * |
057ace5e | 2776 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2777 | { |
ab5b3a5b | 2778 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2779 | |
2486fa56 | 2780 | if (unlikely(!dev || !ata_dev_enabled(dev))) |
1da177e4 LT |
2781 | return NULL; |
2782 | ||
1da177e4 LT |
2783 | return dev; |
2784 | } | |
2785 | ||
b095518e JG |
2786 | /* |
2787 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2788 | * @byte1: Byte 1 from pass-thru CDB. | |
2789 | * | |
2790 | * RETURNS: | |
2791 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2792 | */ | |
2793 | static u8 | |
2794 | ata_scsi_map_proto(u8 byte1) | |
2795 | { | |
2796 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2797 | case 3: /* Non-data */ |
2798 | return ATA_PROT_NODATA; | |
2799 | ||
2800 | case 6: /* DMA */ | |
2801 | case 10: /* UDMA Data-in */ | |
2802 | case 11: /* UDMA Data-Out */ | |
2803 | return ATA_PROT_DMA; | |
2804 | ||
2805 | case 4: /* PIO Data-in */ | |
2806 | case 5: /* PIO Data-out */ | |
2807 | return ATA_PROT_PIO; | |
2808 | ||
2809 | case 0: /* Hard Reset */ | |
2810 | case 1: /* SRST */ | |
2811 | case 8: /* Device Diagnostic */ | |
2812 | case 9: /* Device Reset */ | |
2813 | case 7: /* DMA Queued */ | |
2814 | case 12: /* FPDMA */ | |
2815 | case 15: /* Return Response Info */ | |
2816 | default: /* Reserved */ | |
2817 | break; | |
b095518e JG |
2818 | } |
2819 | ||
2820 | return ATA_PROT_UNKNOWN; | |
2821 | } | |
2822 | ||
2823 | /** | |
2824 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2825 | * @qc: command structure to be initialized | |
b095518e JG |
2826 | * |
2827 | * Handles either 12 or 16-byte versions of the CDB. | |
2828 | * | |
2829 | * RETURNS: | |
2830 | * Zero on success, non-zero on failure. | |
2831 | */ | |
ad706991 | 2832 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2833 | { |
2834 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2835 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2836 | struct ata_device *dev = qc->dev; |
ad706991 | 2837 | const u8 *cdb = scmd->cmnd; |
b095518e | 2838 | |
542b1444 | 2839 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2840 | goto invalid_fld; |
8190bdb9 | 2841 | |
b095518e JG |
2842 | /* |
2843 | * 12 and 16 byte CDBs use different offsets to | |
2844 | * provide the various register values. | |
2845 | */ | |
542b1444 | 2846 | if (cdb[0] == ATA_16) { |
b095518e JG |
2847 | /* |
2848 | * 16-byte CDB - may contain extended commands. | |
2849 | * | |
2850 | * If that is the case, copy the upper byte register values. | |
2851 | */ | |
542b1444 TH |
2852 | if (cdb[1] & 0x01) { |
2853 | tf->hob_feature = cdb[3]; | |
2854 | tf->hob_nsect = cdb[5]; | |
2855 | tf->hob_lbal = cdb[7]; | |
2856 | tf->hob_lbam = cdb[9]; | |
2857 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2858 | tf->flags |= ATA_TFLAG_LBA48; |
2859 | } else | |
2860 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2861 | ||
2862 | /* | |
2863 | * Always copy low byte, device and command registers. | |
2864 | */ | |
542b1444 TH |
2865 | tf->feature = cdb[4]; |
2866 | tf->nsect = cdb[6]; | |
2867 | tf->lbal = cdb[8]; | |
2868 | tf->lbam = cdb[10]; | |
2869 | tf->lbah = cdb[12]; | |
2870 | tf->device = cdb[13]; | |
2871 | tf->command = cdb[14]; | |
b095518e JG |
2872 | } else { |
2873 | /* | |
2874 | * 12-byte CDB - incapable of extended commands. | |
2875 | */ | |
2876 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2877 | ||
542b1444 TH |
2878 | tf->feature = cdb[3]; |
2879 | tf->nsect = cdb[4]; | |
2880 | tf->lbal = cdb[5]; | |
2881 | tf->lbam = cdb[6]; | |
2882 | tf->lbah = cdb[7]; | |
2883 | tf->device = cdb[8]; | |
2884 | tf->command = cdb[9]; | |
b095518e | 2885 | } |
fa4453c4 AL |
2886 | |
2887 | /* enforce correct master/slave bit */ | |
2888 | tf->device = dev->devno ? | |
2889 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2890 | |
bd30add8 TH |
2891 | /* READ/WRITE LONG use a non-standard sect_size */ |
2892 | qc->sect_size = ATA_SECT_SIZE; | |
2893 | switch (tf->command) { | |
2894 | case ATA_CMD_READ_LONG: | |
2895 | case ATA_CMD_READ_LONG_ONCE: | |
2896 | case ATA_CMD_WRITE_LONG: | |
2897 | case ATA_CMD_WRITE_LONG_ONCE: | |
2898 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2899 | goto invalid_fld; | |
2900 | qc->sect_size = scsi_bufflen(scmd); | |
2901 | } | |
2902 | ||
2903 | /* | |
2904 | * Set flags so that all registers will be written, pass on | |
2905 | * write indication (used for PIO/DMA setup), result TF is | |
2906 | * copied back and we don't whine too much about its failure. | |
2907 | */ | |
bc496ed0 | 2908 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
bd30add8 TH |
2909 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
2910 | tf->flags |= ATA_TFLAG_WRITE; | |
2911 | ||
2912 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
2913 | ||
2914 | /* | |
2915 | * Set transfer length. | |
2916 | * | |
2917 | * TODO: find out if we need to do more here to | |
2918 | * cover scatter/gather case. | |
2919 | */ | |
2920 | ata_qc_set_pc_nbytes(qc); | |
2921 | ||
2922 | /* We may not issue DMA commands if no DMA mode is set */ | |
2923 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2924 | goto invalid_fld; | |
2925 | ||
1dce589c AL |
2926 | /* sanity check for pio multi commands */ |
2927 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2928 | goto invalid_fld; | |
2929 | ||
2930 | if (is_multi_taskfile(tf)) { | |
2931 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2932 | ||
2933 | /* compare the passed through multi_count | |
2934 | * with the cached multi_count of libata | |
2935 | */ | |
2936 | if (multi_count != dev->multi_count) | |
2937 | ata_dev_printk(dev, KERN_WARNING, | |
2938 | "invalid multi_count %u ignored\n", | |
2939 | multi_count); | |
d26fc955 | 2940 | } |
1dce589c | 2941 | |
b095518e JG |
2942 | /* |
2943 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2944 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2945 | * by an update to hardware-specific registers for each | |
2946 | * controller (i.e. the reason for ->set_piomode(), | |
2947 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2948 | */ | |
bd30add8 TH |
2949 | if (tf->command == ATA_CMD_SET_FEATURES && |
2950 | tf->feature == SETFEATURES_XFER) | |
9a405257 | 2951 | goto invalid_fld; |
b095518e JG |
2952 | |
2953 | /* | |
bd30add8 TH |
2954 | * Filter TPM commands by default. These provide an |
2955 | * essentially uncontrolled encrypted "back door" between | |
2956 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2957 | * have a real reason for wanting to use them. This ensures | |
2958 | * that installed software cannot easily mess stuff up without | |
2959 | * user intent. DVR type users will probably ship with this enabled | |
2960 | * for movie content management. | |
b095518e | 2961 | * |
bd30add8 TH |
2962 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock |
2963 | * for this and should do in future but that it is not sufficient as | |
2964 | * DCS is an optional feature set. Thus we also do the software filter | |
2965 | * so that we comply with the TC consortium stated goal that the user | |
2966 | * can turn off TC features of their system. | |
b095518e | 2967 | */ |
bd30add8 TH |
2968 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) |
2969 | goto invalid_fld; | |
e61e0672 | 2970 | |
b095518e | 2971 | return 0; |
9a405257 TH |
2972 | |
2973 | invalid_fld: | |
542b1444 | 2974 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2975 | /* "Invalid field in cdb" */ |
2976 | return 1; | |
b095518e JG |
2977 | } |
2978 | ||
18f0f978 CH |
2979 | static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) |
2980 | { | |
2981 | struct ata_taskfile *tf = &qc->tf; | |
2982 | struct scsi_cmnd *scmd = qc->scsicmd; | |
2983 | struct ata_device *dev = qc->dev; | |
2984 | const u8 *cdb = scmd->cmnd; | |
2985 | u64 block; | |
2986 | u32 n_block; | |
2987 | u32 size; | |
2988 | void *buf; | |
2989 | ||
2990 | /* we may not issue DMA commands if no DMA mode is set */ | |
2991 | if (unlikely(!dev->dma_mode)) | |
2992 | goto invalid_fld; | |
2993 | ||
2994 | if (unlikely(scmd->cmd_len < 16)) | |
2995 | goto invalid_fld; | |
2996 | scsi_16_lba_len(cdb, &block, &n_block); | |
2997 | ||
2998 | /* for now we only support WRITE SAME with the unmap bit set */ | |
2999 | if (unlikely(!(cdb[1] & 0x8))) | |
3000 | goto invalid_fld; | |
3001 | ||
3002 | /* | |
3003 | * WRITE SAME always has a sector sized buffer as payload, this | |
3004 | * should never be a multiple entry S/G list. | |
3005 | */ | |
3006 | if (!scsi_sg_count(scmd)) | |
3007 | goto invalid_fld; | |
3008 | ||
3009 | buf = page_address(sg_page(scsi_sglist(scmd))); | |
d0634c4a | 3010 | size = ata_set_lba_range_entries(buf, 512, block, n_block); |
18f0f978 CH |
3011 | |
3012 | tf->protocol = ATA_PROT_DMA; | |
3013 | tf->hob_feature = 0; | |
3014 | tf->feature = ATA_DSM_TRIM; | |
3015 | tf->hob_nsect = (size / 512) >> 8; | |
3016 | tf->nsect = size / 512; | |
3017 | tf->command = ATA_CMD_DSM; | |
3018 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | | |
3019 | ATA_TFLAG_WRITE; | |
3020 | ||
3021 | ata_qc_set_pc_nbytes(qc); | |
3022 | ||
3023 | return 0; | |
3024 | ||
3025 | invalid_fld: | |
3026 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); | |
3027 | /* "Invalid field in cdb" */ | |
3028 | return 1; | |
3029 | } | |
3030 | ||
1da177e4 LT |
3031 | /** |
3032 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
3033 | * @dev: ATA device | |
3034 | * @cmd: SCSI command opcode to consider | |
3035 | * | |
3036 | * Look up the SCSI command given, and determine whether the | |
3037 | * SCSI command is to be translated or simulated. | |
3038 | * | |
3039 | * RETURNS: | |
3040 | * Pointer to translation function if possible, %NULL if not. | |
3041 | */ | |
3042 | ||
3043 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
3044 | { | |
3045 | switch (cmd) { | |
3046 | case READ_6: | |
3047 | case READ_10: | |
3048 | case READ_16: | |
3049 | ||
3050 | case WRITE_6: | |
3051 | case WRITE_10: | |
3052 | case WRITE_16: | |
3053 | return ata_scsi_rw_xlat; | |
3054 | ||
0cdd6eb7 | 3055 | case WRITE_SAME_16: |
18f0f978 CH |
3056 | return ata_scsi_write_same_xlat; |
3057 | ||
1da177e4 LT |
3058 | case SYNCHRONIZE_CACHE: |
3059 | if (ata_try_flush_cache(dev)) | |
3060 | return ata_scsi_flush_xlat; | |
3061 | break; | |
3062 | ||
3063 | case VERIFY: | |
3064 | case VERIFY_16: | |
3065 | return ata_scsi_verify_xlat; | |
b095518e JG |
3066 | |
3067 | case ATA_12: | |
3068 | case ATA_16: | |
3069 | return ata_scsi_pass_thru; | |
da61396d | 3070 | |
972dcafb DG |
3071 | case START_STOP: |
3072 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
3073 | } |
3074 | ||
3075 | return NULL; | |
3076 | } | |
3077 | ||
3078 | /** | |
3079 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
3080 | * @ap: ATA port to which the command was being sent | |
3081 | * @cmd: SCSI command to dump | |
3082 | * | |
3083 | * Prints the contents of a SCSI command via printk(). | |
3084 | */ | |
3085 | ||
3086 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
3087 | struct scsi_cmnd *cmd) | |
3088 | { | |
3089 | #ifdef ATA_DEBUG | |
3090 | struct scsi_device *scsidev = cmd->device; | |
3091 | u8 *scsicmd = cmd->cmnd; | |
3092 | ||
3093 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 3094 | ap->print_id, |
1da177e4 LT |
3095 | scsidev->channel, scsidev->id, scsidev->lun, |
3096 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
3097 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
3098 | scsicmd[8]); | |
3099 | #endif | |
3100 | } | |
3101 | ||
542b1444 | 3102 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
3103 | void (*done)(struct scsi_cmnd *), |
3104 | struct ata_device *dev) | |
eb3f0f9c | 3105 | { |
baf4fdfa ML |
3106 | u8 scsi_op = scmd->cmnd[0]; |
3107 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
3108 | int rc = 0; |
3109 | ||
eb3f0f9c | 3110 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
3111 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
3112 | goto bad_cdb_len; | |
eb3f0f9c | 3113 | |
baf4fdfa ML |
3114 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
3115 | } else { | |
3116 | if (unlikely(!scmd->cmd_len)) | |
3117 | goto bad_cdb_len; | |
3118 | ||
3119 | xlat_func = NULL; | |
3120 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
3121 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
3122 | int len = COMMAND_SIZE(scsi_op); |
3123 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
3124 | goto bad_cdb_len; |
3125 | ||
3126 | xlat_func = atapi_xlat; | |
3127 | } else { | |
3128 | /* ATA_16 passthru, treat as an ATA command */ | |
3129 | if (unlikely(scmd->cmd_len > 16)) | |
3130 | goto bad_cdb_len; | |
3131 | ||
3132 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
3133 | } | |
3134 | } | |
3135 | ||
3136 | if (xlat_func) | |
3137 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
3138 | else | |
3139 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
3140 | |
3141 | return rc; | |
baf4fdfa ML |
3142 | |
3143 | bad_cdb_len: | |
3144 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
3145 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
3146 | scmd->result = DID_ERROR << 16; | |
3147 | done(scmd); | |
3148 | return 0; | |
eb3f0f9c BK |
3149 | } |
3150 | ||
1da177e4 LT |
3151 | /** |
3152 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
3153 | * @cmd: SCSI command to be sent | |
3154 | * @done: Completion function, called when command is complete | |
3155 | * | |
3156 | * In some cases, this function translates SCSI commands into | |
3157 | * ATA taskfiles, and queues the taskfiles to be sent to | |
3158 | * hardware. In other cases, this function simulates a | |
3159 | * SCSI device by evaluating and responding to certain | |
3160 | * SCSI commands. This creates the overall effect of | |
3161 | * ATA and ATAPI devices appearing as SCSI devices. | |
3162 | * | |
3163 | * LOCKING: | |
cca3974e | 3164 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
3165 | * |
3166 | * RETURNS: | |
2115ea94 TH |
3167 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3168 | * 0 otherwise. | |
1da177e4 | 3169 | */ |
1da177e4 LT |
3170 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
3171 | { | |
3172 | struct ata_port *ap; | |
3173 | struct ata_device *dev; | |
3174 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 3175 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 3176 | int rc = 0; |
1da177e4 | 3177 | |
35bb94b1 | 3178 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
3179 | |
3180 | spin_unlock(shost->host_lock); | |
ba6a1308 | 3181 | spin_lock(ap->lock); |
1da177e4 LT |
3182 | |
3183 | ata_scsi_dump_cdb(ap, cmd); | |
3184 | ||
3185 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 3186 | if (likely(dev)) |
2115ea94 | 3187 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 3188 | else { |
1da177e4 LT |
3189 | cmd->result = (DID_BAD_TARGET << 16); |
3190 | done(cmd); | |
1da177e4 LT |
3191 | } |
3192 | ||
ba6a1308 | 3193 | spin_unlock(ap->lock); |
005a5a06 | 3194 | spin_lock(shost->host_lock); |
2115ea94 | 3195 | return rc; |
1da177e4 LT |
3196 | } |
3197 | ||
3198 | /** | |
3199 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 3200 | * @dev: the target device |
1da177e4 LT |
3201 | * @cmd: SCSI command being sent to device. |
3202 | * @done: SCSI command completion function. | |
3203 | * | |
3204 | * Interprets and directly executes a select list of SCSI commands | |
3205 | * that can be handled internally. | |
3206 | * | |
3207 | * LOCKING: | |
cca3974e | 3208 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3209 | */ |
3210 | ||
3373efd8 | 3211 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
3212 | void (*done)(struct scsi_cmnd *)) |
3213 | { | |
3214 | struct ata_scsi_args args; | |
057ace5e | 3215 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 3216 | u8 tmp8; |
1da177e4 | 3217 | |
9a3dccc4 TH |
3218 | args.dev = dev; |
3219 | args.id = dev->id; | |
1da177e4 LT |
3220 | args.cmd = cmd; |
3221 | args.done = done; | |
3222 | ||
3223 | switch(scsicmd[0]) { | |
2dcb407e JG |
3224 | /* TODO: worth improving? */ |
3225 | case FORMAT_UNIT: | |
3226 | ata_scsi_invalid_field(cmd, done); | |
3227 | break; | |
3228 | ||
3229 | case INQUIRY: | |
3230 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 3231 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
3232 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3233 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3234 | else switch (scsicmd[2]) { | |
3235 | case 0x00: | |
3236 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3237 | break; |
2dcb407e JG |
3238 | case 0x80: |
3239 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3240 | break; |
2dcb407e JG |
3241 | case 0x83: |
3242 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3243 | break; |
2dcb407e JG |
3244 | case 0x89: |
3245 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3246 | break; | |
18f0f978 CH |
3247 | case 0xb0: |
3248 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); | |
3249 | break; | |
1e9dbc92 MW |
3250 | case 0xb1: |
3251 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); | |
3252 | break; | |
2dcb407e | 3253 | default: |
ae006510 | 3254 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 3255 | break; |
2dcb407e JG |
3256 | } |
3257 | break; | |
3258 | ||
3259 | case MODE_SENSE: | |
3260 | case MODE_SENSE_10: | |
3261 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3262 | break; | |
3263 | ||
3264 | case MODE_SELECT: /* unconditionally return */ | |
3265 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3266 | ata_scsi_invalid_field(cmd, done); | |
3267 | break; | |
1da177e4 | 3268 | |
2dcb407e JG |
3269 | case READ_CAPACITY: |
3270 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3271 | break; | |
3272 | ||
3273 | case SERVICE_ACTION_IN: | |
3274 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3275 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3276 | else |
3277 | ata_scsi_invalid_field(cmd, done); | |
3278 | break; | |
1da177e4 | 3279 | |
2dcb407e JG |
3280 | case REPORT_LUNS: |
3281 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3282 | break; | |
1da177e4 | 3283 | |
2dcb407e JG |
3284 | case REQUEST_SENSE: |
3285 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3286 | cmd->result = (DRIVER_SENSE << 24); | |
3287 | done(cmd); | |
3288 | break; | |
1da177e4 | 3289 | |
2dcb407e JG |
3290 | /* if we reach this, then writeback caching is disabled, |
3291 | * turning this into a no-op. | |
3292 | */ | |
3293 | case SYNCHRONIZE_CACHE: | |
3294 | /* fall through */ | |
3295 | ||
3296 | /* no-op's, complete with success */ | |
3297 | case REZERO_UNIT: | |
3298 | case SEEK_6: | |
3299 | case SEEK_10: | |
3300 | case TEST_UNIT_READY: | |
3301 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3302 | break; | |
45394145 | 3303 | |
2dcb407e JG |
3304 | case SEND_DIAGNOSTIC: |
3305 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3306 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3307 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3308 | else |
3309 | ata_scsi_invalid_field(cmd, done); | |
3310 | break; | |
1da177e4 | 3311 | |
2dcb407e JG |
3312 | /* all other commands */ |
3313 | default: | |
3314 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3315 | /* "Invalid command operation code" */ | |
3316 | done(cmd); | |
3317 | break; | |
1da177e4 LT |
3318 | } |
3319 | } | |
3320 | ||
f3187195 TH |
3321 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3322 | { | |
3323 | int i, rc; | |
3324 | ||
3325 | for (i = 0; i < host->n_ports; i++) { | |
3326 | struct ata_port *ap = host->ports[i]; | |
3327 | struct Scsi_Host *shost; | |
3328 | ||
3329 | rc = -ENOMEM; | |
3330 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3331 | if (!shost) | |
3332 | goto err_alloc; | |
3333 | ||
3334 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3335 | ap->scsi_host = shost; | |
3336 | ||
3337 | shost->transportt = &ata_scsi_transport_template; | |
3338 | shost->unique_id = ap->print_id; | |
3339 | shost->max_id = 16; | |
3340 | shost->max_lun = 1; | |
3341 | shost->max_channel = 1; | |
3342 | shost->max_cmd_len = 16; | |
3343 | ||
31cc23b3 TH |
3344 | /* Schedule policy is determined by ->qc_defer() |
3345 | * callback and it needs to see every deferred qc. | |
3346 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3347 | * automatically deferring requests. | |
3348 | */ | |
3349 | shost->max_host_blocked = 1; | |
3350 | ||
f3187195 TH |
3351 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3352 | if (rc) | |
3353 | goto err_add; | |
3354 | } | |
3355 | ||
3356 | return 0; | |
3357 | ||
3358 | err_add: | |
3359 | scsi_host_put(host->ports[i]->scsi_host); | |
3360 | err_alloc: | |
3361 | while (--i >= 0) { | |
3362 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3363 | ||
3364 | scsi_remove_host(shost); | |
3365 | scsi_host_put(shost); | |
3366 | } | |
3367 | return rc; | |
3368 | } | |
3369 | ||
1ae46317 | 3370 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3371 | { |
1ae46317 TH |
3372 | int tries = 5; |
3373 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3374 | struct ata_link *link; |
1ae46317 | 3375 | struct ata_device *dev; |
644dd0cc | 3376 | |
1ae46317 | 3377 | repeat: |
1eca4365 TH |
3378 | ata_for_each_link(link, ap, EDGE) { |
3379 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 TH |
3380 | struct scsi_device *sdev; |
3381 | int channel = 0, id = 0; | |
3edebac4 | 3382 | |
1eca4365 | 3383 | if (dev->sdev) |
41bda9c9 | 3384 | continue; |
3f19ee8c | 3385 | |
41bda9c9 TH |
3386 | if (ata_is_host_link(link)) |
3387 | id = dev->devno; | |
3388 | else | |
3389 | channel = link->pmp; | |
3390 | ||
3391 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3392 | NULL); | |
3393 | if (!IS_ERR(sdev)) { | |
3394 | dev->sdev = sdev; | |
3395 | scsi_device_put(sdev); | |
3396 | } | |
3edebac4 | 3397 | } |
3f19ee8c | 3398 | } |
1ae46317 TH |
3399 | |
3400 | /* If we scanned while EH was in progress or allocation | |
3401 | * failure occurred, scan would have failed silently. Check | |
3402 | * whether all devices are attached. | |
3403 | */ | |
1eca4365 TH |
3404 | ata_for_each_link(link, ap, EDGE) { |
3405 | ata_for_each_dev(dev, link, ENABLED) { | |
3406 | if (!dev->sdev) | |
41bda9c9 TH |
3407 | goto exit_loop; |
3408 | } | |
1ae46317 | 3409 | } |
41bda9c9 TH |
3410 | exit_loop: |
3411 | if (!link) | |
1ae46317 TH |
3412 | return; |
3413 | ||
3414 | /* we're missing some SCSI devices */ | |
3415 | if (sync) { | |
3416 | /* If caller requested synchrnous scan && we've made | |
3417 | * any progress, sleep briefly and repeat. | |
3418 | */ | |
3419 | if (dev != last_failed_dev) { | |
3420 | msleep(100); | |
3421 | last_failed_dev = dev; | |
3422 | goto repeat; | |
3423 | } | |
3424 | ||
3425 | /* We might be failing to detect boot device, give it | |
3426 | * a few more chances. | |
3427 | */ | |
3428 | if (--tries) { | |
3429 | msleep(100); | |
3430 | goto repeat; | |
3431 | } | |
3432 | ||
3433 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3434 | "failed without making any progress,\n" | |
3435 | " switching to async\n"); | |
3436 | } | |
3437 | ||
3438 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3439 | round_jiffies_relative(HZ)); | |
644dd0cc | 3440 | } |
0ea035a3 TH |
3441 | |
3442 | /** | |
3443 | * ata_scsi_offline_dev - offline attached SCSI device | |
3444 | * @dev: ATA device to offline attached SCSI device for | |
3445 | * | |
3446 | * This function is called from ata_eh_hotplug() and responsible | |
3447 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3448 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3449 | * against clearing. |
3450 | * | |
3451 | * LOCKING: | |
cca3974e | 3452 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3453 | * |
3454 | * RETURNS: | |
3455 | * 1 if attached SCSI device exists, 0 otherwise. | |
3456 | */ | |
3457 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3458 | { | |
3459 | if (dev->sdev) { | |
3460 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3461 | return 1; | |
3462 | } | |
3463 | return 0; | |
3464 | } | |
580b2102 TH |
3465 | |
3466 | /** | |
3467 | * ata_scsi_remove_dev - remove attached SCSI device | |
3468 | * @dev: ATA device to remove attached SCSI device for | |
3469 | * | |
3470 | * This function is called from ata_eh_scsi_hotplug() and | |
3471 | * responsible for removing the SCSI device attached to @dev. | |
3472 | * | |
3473 | * LOCKING: | |
3474 | * Kernel thread context (may sleep). | |
3475 | */ | |
3476 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3477 | { | |
9af5c9c9 | 3478 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3479 | struct scsi_device *sdev; |
3480 | unsigned long flags; | |
3481 | ||
3482 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3483 | * state doesn't change underneath us and thus | |
3484 | * scsi_device_get() always succeeds. The mutex locking can | |
3485 | * be removed if there is __scsi_device_get() interface which | |
3486 | * increments reference counts regardless of device state. | |
3487 | */ | |
cca3974e | 3488 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3489 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3490 | |
cca3974e | 3491 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3492 | sdev = dev->sdev; |
3493 | dev->sdev = NULL; | |
3494 | ||
3495 | if (sdev) { | |
3496 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3497 | * away underneath us after the host lock and |
580b2102 TH |
3498 | * scan_mutex are released. Hold onto it. |
3499 | */ | |
3500 | if (scsi_device_get(sdev) == 0) { | |
3501 | /* The following ensures the attached sdev is | |
3502 | * offline on return from ata_scsi_offline_dev() | |
3503 | * regardless it wins or loses the race | |
3504 | * against this function. | |
3505 | */ | |
3506 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3507 | } else { | |
3508 | WARN_ON(1); | |
3509 | sdev = NULL; | |
3510 | } | |
3511 | } | |
3512 | ||
ba6a1308 | 3513 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3514 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3515 | |
3516 | if (sdev) { | |
3517 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
b9d5fc41 | 3518 | dev_name(&sdev->sdev_gendev)); |
580b2102 TH |
3519 | |
3520 | scsi_remove_device(sdev); | |
3521 | scsi_device_put(sdev); | |
3522 | } | |
3523 | } | |
3524 | ||
41bda9c9 TH |
3525 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3526 | { | |
3527 | struct ata_port *ap = link->ap; | |
3528 | struct ata_device *dev; | |
3529 | ||
1eca4365 | 3530 | ata_for_each_dev(dev, link, ALL) { |
41bda9c9 TH |
3531 | unsigned long flags; |
3532 | ||
3533 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3534 | continue; | |
3535 | ||
3536 | spin_lock_irqsave(ap->lock, flags); | |
3537 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3538 | spin_unlock_irqrestore(ap->lock, flags); | |
3539 | ||
3540 | ata_scsi_remove_dev(dev); | |
3541 | } | |
3542 | } | |
3543 | ||
2f294968 KCA |
3544 | /** |
3545 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3546 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3547 | * |
3548 | * Tell the block layer to send a media change notification | |
3549 | * event. | |
3550 | * | |
3551 | * LOCKING: | |
854c73a2 | 3552 | * spin_lock_irqsave(host lock) |
2f294968 | 3553 | */ |
854c73a2 | 3554 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3555 | { |
854c73a2 | 3556 | if (dev->sdev) |
f26792d5 JG |
3557 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3558 | GFP_ATOMIC); | |
2f294968 | 3559 | } |
2f294968 | 3560 | |
580b2102 TH |
3561 | /** |
3562 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3563 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3564 | * |
3565 | * Perform SCSI part of hotplug. It's executed from a separate | |
3566 | * workqueue after EH completes. This is necessary because SCSI | |
3567 | * hot plugging requires working EH and hot unplugging is | |
3568 | * synchronized with hot plugging with a mutex. | |
3569 | * | |
3570 | * LOCKING: | |
3571 | * Kernel thread context (may sleep). | |
3572 | */ | |
65f27f38 | 3573 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3574 | { |
65f27f38 DH |
3575 | struct ata_port *ap = |
3576 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3577 | int i; |
580b2102 | 3578 | |
b51e9e5d | 3579 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3580 | DPRINTK("ENTER/EXIT - unloading\n"); |
3581 | return; | |
3582 | } | |
3583 | ||
3584 | DPRINTK("ENTER\n"); | |
3585 | ||
41bda9c9 TH |
3586 | /* Unplug detached devices. We cannot use link iterator here |
3587 | * because PMP links have to be scanned even if PMP is | |
3588 | * currently not attached. Iterate manually. | |
3589 | */ | |
3590 | ata_scsi_handle_link_detach(&ap->link); | |
3591 | if (ap->pmp_link) | |
3592 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3593 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3594 | |
3595 | /* scan for new ones */ | |
1ae46317 | 3596 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3597 | |
3598 | DPRINTK("EXIT\n"); | |
3599 | } | |
83c47bcb TH |
3600 | |
3601 | /** | |
3602 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3603 | * @shost: SCSI host to scan | |
3604 | * @channel: Channel to scan | |
3605 | * @id: ID to scan | |
3606 | * @lun: LUN to scan | |
3607 | * | |
3608 | * This function is called when user explicitly requests bus | |
3609 | * scan. Set probe pending flag and invoke EH. | |
3610 | * | |
3611 | * LOCKING: | |
3612 | * SCSI layer (we don't care) | |
3613 | * | |
3614 | * RETURNS: | |
3615 | * Zero. | |
3616 | */ | |
3617 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3618 | unsigned int id, unsigned int lun) | |
3619 | { | |
3620 | struct ata_port *ap = ata_shost_to_port(shost); | |
3621 | unsigned long flags; | |
41bda9c9 | 3622 | int devno, rc = 0; |
83c47bcb TH |
3623 | |
3624 | if (!ap->ops->error_handler) | |
3625 | return -EOPNOTSUPP; | |
3626 | ||
41bda9c9 | 3627 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3628 | return -EINVAL; |
3629 | ||
071f44b1 | 3630 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
3631 | if (channel != SCAN_WILD_CARD && channel) |
3632 | return -EINVAL; | |
3633 | devno = id; | |
3634 | } else { | |
3635 | if (id != SCAN_WILD_CARD && id) | |
3636 | return -EINVAL; | |
3637 | devno = channel; | |
3638 | } | |
3639 | ||
ba6a1308 | 3640 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3641 | |
41bda9c9 TH |
3642 | if (devno == SCAN_WILD_CARD) { |
3643 | struct ata_link *link; | |
3644 | ||
1eca4365 | 3645 | ata_for_each_link(link, ap, EDGE) { |
41bda9c9 | 3646 | struct ata_eh_info *ehi = &link->eh_info; |
b558eddd | 3647 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 3648 | ehi->action |= ATA_EH_RESET; |
41bda9c9 | 3649 | } |
83c47bcb | 3650 | } else { |
41bda9c9 | 3651 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3652 | |
3653 | if (dev) { | |
41bda9c9 | 3654 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 | 3655 | ehi->probe_mask |= 1 << dev->devno; |
cf480626 | 3656 | ehi->action |= ATA_EH_RESET; |
83c47bcb TH |
3657 | } else |
3658 | rc = -EINVAL; | |
3659 | } | |
3660 | ||
309afcb5 | 3661 | if (rc == 0) { |
83c47bcb | 3662 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3663 | spin_unlock_irqrestore(ap->lock, flags); |
3664 | ata_port_wait_eh(ap); | |
3665 | } else | |
3666 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3667 | |
3668 | return rc; | |
3669 | } | |
3057ac3c | 3670 | |
3671 | /** | |
d0171269 | 3672 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3673 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3674 | * |
d0171269 TH |
3675 | * After ATA pass thru (SAT) commands are executed successfully, |
3676 | * libata need to propagate the changes to SCSI layer. This | |
3677 | * function must be executed from ata_aux_wq such that sdev | |
3678 | * attach/detach don't race with rescan. | |
3057ac3c | 3679 | * |
d0171269 TH |
3680 | * LOCKING: |
3681 | * Kernel thread context (may sleep). | |
3057ac3c | 3682 | */ |
65f27f38 | 3683 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3684 | { |
65f27f38 DH |
3685 | struct ata_port *ap = |
3686 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3687 | struct ata_link *link; |
f58229f8 | 3688 | struct ata_device *dev; |
f84e7e41 | 3689 | unsigned long flags; |
3057ac3c | 3690 | |
f84e7e41 TH |
3691 | spin_lock_irqsave(ap->lock, flags); |
3692 | ||
1eca4365 TH |
3693 | ata_for_each_link(link, ap, EDGE) { |
3694 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 | 3695 | struct scsi_device *sdev = dev->sdev; |
3057ac3c | 3696 | |
1eca4365 | 3697 | if (!sdev) |
41bda9c9 TH |
3698 | continue; |
3699 | if (scsi_device_get(sdev)) | |
3700 | continue; | |
f84e7e41 | 3701 | |
41bda9c9 TH |
3702 | spin_unlock_irqrestore(ap->lock, flags); |
3703 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3704 | scsi_device_put(sdev); | |
3705 | spin_lock_irqsave(ap->lock, flags); | |
3706 | } | |
3057ac3c | 3707 | } |
f84e7e41 TH |
3708 | |
3709 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3710 | } |
80289167 BK |
3711 | |
3712 | /** | |
3713 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3714 | * @host: ATA host container for all SAS ports |
80289167 | 3715 | * @port_info: Information from low-level host driver |
cca3974e | 3716 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3717 | * |
3718 | * LOCKING: | |
3719 | * PCI/etc. bus probe sem. | |
3720 | * | |
3721 | * RETURNS: | |
3722 | * ata_port pointer on success / NULL on failure. | |
3723 | */ | |
3724 | ||
cca3974e | 3725 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3726 | struct ata_port_info *port_info, |
cca3974e | 3727 | struct Scsi_Host *shost) |
80289167 | 3728 | { |
f3187195 | 3729 | struct ata_port *ap; |
80289167 | 3730 | |
f3187195 | 3731 | ap = ata_port_alloc(host); |
80289167 BK |
3732 | if (!ap) |
3733 | return NULL; | |
3734 | ||
f3187195 | 3735 | ap->port_no = 0; |
cca3974e | 3736 | ap->lock = shost->host_lock; |
f3187195 TH |
3737 | ap->pio_mask = port_info->pio_mask; |
3738 | ap->mwdma_mask = port_info->mwdma_mask; | |
3739 | ap->udma_mask = port_info->udma_mask; | |
3740 | ap->flags |= port_info->flags; | |
3741 | ap->ops = port_info->port_ops; | |
3742 | ap->cbl = ATA_CBL_SATA; | |
3743 | ||
80289167 BK |
3744 | return ap; |
3745 | } | |
3746 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3747 | ||
3748 | /** | |
3749 | * ata_sas_port_start - Set port up for dma. | |
3750 | * @ap: Port to initialize | |
3751 | * | |
3752 | * Called just after data structures for each port are | |
dde20207 | 3753 | * initialized. |
80289167 BK |
3754 | * |
3755 | * May be used as the port_start() entry in ata_port_operations. | |
3756 | * | |
3757 | * LOCKING: | |
3758 | * Inherited from caller. | |
3759 | */ | |
3760 | int ata_sas_port_start(struct ata_port *ap) | |
3761 | { | |
dde20207 | 3762 | return 0; |
80289167 BK |
3763 | } |
3764 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3765 | ||
3766 | /** | |
3767 | * ata_port_stop - Undo ata_sas_port_start() | |
3768 | * @ap: Port to shut down | |
3769 | * | |
80289167 BK |
3770 | * May be used as the port_stop() entry in ata_port_operations. |
3771 | * | |
3772 | * LOCKING: | |
3773 | * Inherited from caller. | |
3774 | */ | |
3775 | ||
3776 | void ata_sas_port_stop(struct ata_port *ap) | |
3777 | { | |
80289167 BK |
3778 | } |
3779 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3780 | ||
3781 | /** | |
3782 | * ata_sas_port_init - Initialize a SATA device | |
3783 | * @ap: SATA port to initialize | |
3784 | * | |
3785 | * LOCKING: | |
3786 | * PCI/etc. bus probe sem. | |
3787 | * | |
3788 | * RETURNS: | |
3789 | * Zero on success, non-zero on error. | |
3790 | */ | |
3791 | ||
3792 | int ata_sas_port_init(struct ata_port *ap) | |
3793 | { | |
3794 | int rc = ap->ops->port_start(ap); | |
3795 | ||
f3187195 TH |
3796 | if (!rc) { |
3797 | ap->print_id = ata_print_id++; | |
80289167 | 3798 | rc = ata_bus_probe(ap); |
f3187195 | 3799 | } |
80289167 BK |
3800 | |
3801 | return rc; | |
3802 | } | |
3803 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3804 | ||
3805 | /** | |
3806 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3807 | * @ap: SATA port to destroy | |
3808 | * | |
3809 | */ | |
3810 | ||
3811 | void ata_sas_port_destroy(struct ata_port *ap) | |
3812 | { | |
f0d36efd TH |
3813 | if (ap->ops->port_stop) |
3814 | ap->ops->port_stop(ap); | |
80289167 BK |
3815 | kfree(ap); |
3816 | } | |
3817 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3818 | ||
3819 | /** | |
3820 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3821 | * @sdev: SCSI device to configure | |
3822 | * @ap: ATA port to which SCSI device is attached | |
3823 | * | |
3824 | * RETURNS: | |
3825 | * Zero. | |
3826 | */ | |
3827 | ||
3828 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3829 | { | |
3830 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3831 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3832 | return 0; |
3833 | } | |
3834 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3835 | ||
3836 | /** | |
3837 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3838 | * @cmd: SCSI command to be sent | |
3839 | * @done: Completion function, called when command is complete | |
3840 | * @ap: ATA port to which the command is being sent | |
3841 | * | |
3842 | * RETURNS: | |
08475a19 BK |
3843 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3844 | * 0 otherwise. | |
80289167 BK |
3845 | */ |
3846 | ||
3847 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3848 | struct ata_port *ap) | |
3849 | { | |
08475a19 BK |
3850 | int rc = 0; |
3851 | ||
80289167 BK |
3852 | ata_scsi_dump_cdb(ap, cmd); |
3853 | ||
2486fa56 | 3854 | if (likely(ata_dev_enabled(ap->link.device))) |
9af5c9c9 | 3855 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); |
80289167 BK |
3856 | else { |
3857 | cmd->result = (DID_BAD_TARGET << 16); | |
3858 | done(cmd); | |
3859 | } | |
08475a19 | 3860 | return rc; |
80289167 BK |
3861 | } |
3862 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |