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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
1da177e4 | 40 | #include <scsi/scsi_host.h> |
beb40487 | 41 | #include <scsi/scsi_cmnd.h> |
85837ebd | 42 | #include <scsi/scsi_eh.h> |
005a5a06 | 43 | #include <scsi/scsi_device.h> |
a6e6ce8e | 44 | #include <scsi/scsi_tcq.h> |
30afc84c | 45 | #include <scsi/scsi_transport.h> |
1da177e4 | 46 | #include <linux/libata.h> |
b095518e | 47 | #include <linux/hdreg.h> |
2dcb407e | 48 | #include <linux/uaccess.h> |
2a6e58d2 | 49 | #include <linux/suspend.h> |
1da177e4 LT |
50 | |
51 | #include "libata.h" | |
52 | ||
87340e98 TH |
53 | #define SECTOR_SIZE 512 |
54 | #define ATA_SCSI_RBUF_SIZE 4096 | |
55 | ||
56 | static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); | |
57 | static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; | |
b095518e | 58 | |
ad706991 | 59 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); |
ab5b3a5b | 60 | |
2dcb407e | 61 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 62 | const struct scsi_device *scsidev); |
2dcb407e | 63 | static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 64 | const struct scsi_device *scsidev); |
83c47bcb TH |
65 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
66 | unsigned int id, unsigned int lun); | |
ab5b3a5b | 67 | |
1da177e4 | 68 | |
00ac37f5 DG |
69 | #define RW_RECOVERY_MPAGE 0x1 |
70 | #define RW_RECOVERY_MPAGE_LEN 12 | |
71 | #define CACHE_MPAGE 0x8 | |
72 | #define CACHE_MPAGE_LEN 20 | |
73 | #define CONTROL_MPAGE 0xa | |
74 | #define CONTROL_MPAGE_LEN 12 | |
75 | #define ALL_MPAGES 0x3f | |
76 | #define ALL_SUB_MPAGES 0xff | |
77 | ||
78 | ||
24f75686 | 79 | static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { |
00ac37f5 DG |
80 | RW_RECOVERY_MPAGE, |
81 | RW_RECOVERY_MPAGE_LEN - 2, | |
24f75686 | 82 | (1 << 7), /* AWRE */ |
00ac37f5 DG |
83 | 0, /* read retry count */ |
84 | 0, 0, 0, 0, | |
85 | 0, /* write retry count */ | |
86 | 0, 0, 0 | |
87 | }; | |
88 | ||
89 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
90 | CACHE_MPAGE, | |
91 | CACHE_MPAGE_LEN - 2, | |
92 | 0, /* contains WCE, needs to be 0 for logic */ | |
93 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
94 | 0, /* contains DRA, needs to be 0 for logic */ | |
95 | 0, 0, 0, 0, 0, 0, 0 | |
96 | }; | |
97 | ||
98 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
99 | CONTROL_MPAGE, | |
100 | CONTROL_MPAGE_LEN - 2, | |
101 | 2, /* DSENSE=0, GLTSD=1 */ | |
102 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
103 | 0, 0, 0, 0, 0xff, 0xff, | |
104 | 0, 30 /* extended self test time, see 05-359r1 */ | |
105 | }; | |
106 | ||
30afc84c TH |
107 | /* |
108 | * libata transport template. libata doesn't do real transport stuff. | |
109 | * It just needs the eh_timed_out hook. | |
110 | */ | |
f3187195 | 111 | static struct scsi_transport_template ata_scsi_transport_template = { |
9227c33d | 112 | .eh_strategy_handler = ata_scsi_error, |
30afc84c | 113 | .eh_timed_out = ata_scsi_timed_out, |
ccf68c34 | 114 | .user_scan = ata_scsi_user_scan, |
30afc84c TH |
115 | }; |
116 | ||
1da177e4 | 117 | |
ca77329f KCA |
118 | static const struct { |
119 | enum link_pm value; | |
120 | const char *name; | |
121 | } link_pm_policy[] = { | |
122 | { NOT_AVAILABLE, "max_performance" }, | |
123 | { MIN_POWER, "min_power" }, | |
124 | { MAX_PERFORMANCE, "max_performance" }, | |
125 | { MEDIUM_POWER, "medium_power" }, | |
126 | }; | |
127 | ||
a2d6ed14 | 128 | static const char *ata_scsi_lpm_get(enum link_pm policy) |
ca77329f KCA |
129 | { |
130 | int i; | |
131 | ||
132 | for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++) | |
133 | if (link_pm_policy[i].value == policy) | |
134 | return link_pm_policy[i].name; | |
135 | ||
136 | return NULL; | |
137 | } | |
138 | ||
ee959b00 TJ |
139 | static ssize_t ata_scsi_lpm_put(struct device *dev, |
140 | struct device_attribute *attr, | |
141 | const char *buf, size_t count) | |
ca77329f | 142 | { |
ee959b00 | 143 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
144 | struct ata_port *ap = ata_shost_to_port(shost); |
145 | enum link_pm policy = 0; | |
146 | int i; | |
147 | ||
148 | /* | |
149 | * we are skipping array location 0 on purpose - this | |
150 | * is because a value of NOT_AVAILABLE is displayed | |
151 | * to the user as max_performance, but when the user | |
152 | * writes "max_performance", they actually want the | |
153 | * value to match MAX_PERFORMANCE. | |
154 | */ | |
155 | for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) { | |
156 | const int len = strlen(link_pm_policy[i].name); | |
157 | if (strncmp(link_pm_policy[i].name, buf, len) == 0 && | |
158 | buf[len] == '\n') { | |
159 | policy = link_pm_policy[i].value; | |
160 | break; | |
161 | } | |
162 | } | |
163 | if (!policy) | |
164 | return -EINVAL; | |
165 | ||
166 | ata_lpm_schedule(ap, policy); | |
167 | return count; | |
168 | } | |
169 | ||
170 | static ssize_t | |
ee959b00 | 171 | ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf) |
ca77329f | 172 | { |
ee959b00 | 173 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
174 | struct ata_port *ap = ata_shost_to_port(shost); |
175 | const char *policy = | |
176 | ata_scsi_lpm_get(ap->pm_policy); | |
177 | ||
178 | if (!policy) | |
179 | return -EINVAL; | |
180 | ||
181 | return snprintf(buf, 23, "%s\n", policy); | |
182 | } | |
ee959b00 | 183 | DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, |
ca77329f | 184 | ata_scsi_lpm_show, ata_scsi_lpm_put); |
ee959b00 | 185 | EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); |
ca77329f | 186 | |
45fabbb7 EO |
187 | static ssize_t ata_scsi_park_show(struct device *device, |
188 | struct device_attribute *attr, char *buf) | |
189 | { | |
190 | struct scsi_device *sdev = to_scsi_device(device); | |
191 | struct ata_port *ap; | |
192 | struct ata_link *link; | |
193 | struct ata_device *dev; | |
a464189d | 194 | unsigned long flags, now; |
45fabbb7 EO |
195 | unsigned int uninitialized_var(msecs); |
196 | int rc = 0; | |
197 | ||
198 | ap = ata_shost_to_port(sdev->host); | |
199 | ||
200 | spin_lock_irqsave(ap->lock, flags); | |
201 | dev = ata_scsi_find_dev(ap, sdev); | |
202 | if (!dev) { | |
203 | rc = -ENODEV; | |
204 | goto unlock; | |
205 | } | |
206 | if (dev->flags & ATA_DFLAG_NO_UNLOAD) { | |
207 | rc = -EOPNOTSUPP; | |
208 | goto unlock; | |
209 | } | |
210 | ||
211 | link = dev->link; | |
a464189d | 212 | now = jiffies; |
45fabbb7 EO |
213 | if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && |
214 | link->eh_context.unloaded_mask & (1 << dev->devno) && | |
a464189d EO |
215 | time_after(dev->unpark_deadline, now)) |
216 | msecs = jiffies_to_msecs(dev->unpark_deadline - now); | |
45fabbb7 EO |
217 | else |
218 | msecs = 0; | |
219 | ||
220 | unlock: | |
221 | spin_unlock_irq(ap->lock); | |
222 | ||
223 | return rc ? rc : snprintf(buf, 20, "%u\n", msecs); | |
224 | } | |
225 | ||
226 | static ssize_t ata_scsi_park_store(struct device *device, | |
227 | struct device_attribute *attr, | |
228 | const char *buf, size_t len) | |
229 | { | |
230 | struct scsi_device *sdev = to_scsi_device(device); | |
231 | struct ata_port *ap; | |
232 | struct ata_device *dev; | |
233 | long int input; | |
234 | unsigned long flags; | |
235 | int rc; | |
236 | ||
237 | rc = strict_strtol(buf, 10, &input); | |
238 | if (rc || input < -2) | |
239 | return -EINVAL; | |
240 | if (input > ATA_TMOUT_MAX_PARK) { | |
241 | rc = -EOVERFLOW; | |
242 | input = ATA_TMOUT_MAX_PARK; | |
243 | } | |
244 | ||
245 | ap = ata_shost_to_port(sdev->host); | |
246 | ||
247 | spin_lock_irqsave(ap->lock, flags); | |
248 | dev = ata_scsi_find_dev(ap, sdev); | |
249 | if (unlikely(!dev)) { | |
250 | rc = -ENODEV; | |
251 | goto unlock; | |
252 | } | |
253 | if (dev->class != ATA_DEV_ATA) { | |
254 | rc = -EOPNOTSUPP; | |
255 | goto unlock; | |
256 | } | |
257 | ||
258 | if (input >= 0) { | |
259 | if (dev->flags & ATA_DFLAG_NO_UNLOAD) { | |
260 | rc = -EOPNOTSUPP; | |
261 | goto unlock; | |
262 | } | |
263 | ||
264 | dev->unpark_deadline = ata_deadline(jiffies, input); | |
265 | dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; | |
266 | ata_port_schedule_eh(ap); | |
267 | complete(&ap->park_req_pending); | |
268 | } else { | |
269 | switch (input) { | |
270 | case -1: | |
271 | dev->flags &= ~ATA_DFLAG_NO_UNLOAD; | |
272 | break; | |
273 | case -2: | |
274 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
275 | break; | |
276 | } | |
277 | } | |
278 | unlock: | |
279 | spin_unlock_irqrestore(ap->lock, flags); | |
280 | ||
281 | return rc ? rc : len; | |
282 | } | |
283 | DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, | |
284 | ata_scsi_park_show, ata_scsi_park_store); | |
285 | EXPORT_SYMBOL_GPL(dev_attr_unload_heads); | |
286 | ||
f0761be3 TH |
287 | static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) |
288 | { | |
289 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
290 | ||
291 | scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); | |
292 | } | |
293 | ||
18f7ba4c KCA |
294 | static ssize_t |
295 | ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, | |
296 | const char *buf, size_t count) | |
297 | { | |
298 | struct Scsi_Host *shost = class_to_shost(dev); | |
299 | struct ata_port *ap = ata_shost_to_port(shost); | |
300 | if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) | |
301 | return ap->ops->em_store(ap, buf, count); | |
302 | return -EINVAL; | |
303 | } | |
304 | ||
305 | static ssize_t | |
306 | ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, | |
307 | char *buf) | |
308 | { | |
309 | struct Scsi_Host *shost = class_to_shost(dev); | |
310 | struct ata_port *ap = ata_shost_to_port(shost); | |
311 | ||
312 | if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) | |
313 | return ap->ops->em_show(ap, buf); | |
314 | return -EINVAL; | |
315 | } | |
316 | DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO, | |
317 | ata_scsi_em_message_show, ata_scsi_em_message_store); | |
318 | EXPORT_SYMBOL_GPL(dev_attr_em_message); | |
319 | ||
320 | static ssize_t | |
321 | ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, | |
322 | char *buf) | |
323 | { | |
324 | struct Scsi_Host *shost = class_to_shost(dev); | |
325 | struct ata_port *ap = ata_shost_to_port(shost); | |
326 | ||
327 | return snprintf(buf, 23, "%d\n", ap->em_message_type); | |
328 | } | |
329 | DEVICE_ATTR(em_message_type, S_IRUGO, | |
330 | ata_scsi_em_message_type_show, NULL); | |
331 | EXPORT_SYMBOL_GPL(dev_attr_em_message_type); | |
332 | ||
333 | static ssize_t | |
334 | ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, | |
335 | char *buf) | |
336 | { | |
337 | struct scsi_device *sdev = to_scsi_device(dev); | |
338 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
339 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
340 | ||
341 | if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY)) | |
342 | return ap->ops->sw_activity_show(atadev, buf); | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
346 | static ssize_t | |
347 | ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, | |
348 | const char *buf, size_t count) | |
349 | { | |
350 | struct scsi_device *sdev = to_scsi_device(dev); | |
351 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
352 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
353 | enum sw_activity val; | |
354 | int rc; | |
355 | ||
356 | if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) { | |
357 | val = simple_strtoul(buf, NULL, 0); | |
358 | switch (val) { | |
359 | case OFF: case BLINK_ON: case BLINK_OFF: | |
360 | rc = ap->ops->sw_activity_store(atadev, val); | |
361 | if (!rc) | |
362 | return count; | |
363 | else | |
364 | return rc; | |
365 | } | |
366 | } | |
367 | return -EINVAL; | |
368 | } | |
369 | DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show, | |
370 | ata_scsi_activity_store); | |
371 | EXPORT_SYMBOL_GPL(dev_attr_sw_activity); | |
372 | ||
45fabbb7 EO |
373 | struct device_attribute *ata_common_sdev_attrs[] = { |
374 | &dev_attr_unload_heads, | |
375 | NULL | |
376 | }; | |
377 | EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); | |
378 | ||
ae006510 DG |
379 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
380 | void (*done)(struct scsi_cmnd *)) | |
381 | { | |
382 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
383 | /* "Invalid field in cbd" */ | |
384 | done(cmd); | |
385 | } | |
386 | ||
1da177e4 LT |
387 | /** |
388 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
389 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
390 | * @bdev: block device associated with @sdev | |
391 | * @capacity: capacity of SCSI device | |
392 | * @geom: location to which geometry will be output | |
393 | * | |
394 | * Generic bios head/sector/cylinder calculator | |
395 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
396 | * mapping. Some situations may arise where the disk is not | |
397 | * bootable if this is not used. | |
398 | * | |
399 | * LOCKING: | |
400 | * Defined by the SCSI layer. We don't really care. | |
401 | * | |
402 | * RETURNS: | |
403 | * Zero. | |
404 | */ | |
405 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
406 | sector_t capacity, int geom[]) | |
407 | { | |
408 | geom[0] = 255; | |
409 | geom[1] = 63; | |
410 | sector_div(capacity, 255*63); | |
411 | geom[2] = capacity; | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
5924b74c TH |
416 | /** |
417 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
5eb66fe0 | 418 | * @ap: target port |
5924b74c TH |
419 | * @sdev: SCSI device to get identify data for |
420 | * @arg: User buffer area for identify data | |
421 | * | |
422 | * LOCKING: | |
423 | * Defined by the SCSI layer. We don't really care. | |
424 | * | |
425 | * RETURNS: | |
426 | * Zero on success, negative errno on error. | |
427 | */ | |
94be9a58 JG |
428 | static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, |
429 | void __user *arg) | |
5924b74c | 430 | { |
5924b74c TH |
431 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); |
432 | u16 __user *dst = arg; | |
433 | char buf[40]; | |
434 | ||
435 | if (!dev) | |
436 | return -ENOMSG; | |
437 | ||
438 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
439 | return -EFAULT; | |
440 | ||
441 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
442 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
443 | return -EFAULT; | |
444 | ||
445 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
446 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
447 | return -EFAULT; | |
448 | ||
449 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
450 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
451 | return -EFAULT; | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
b095518e JG |
456 | /** |
457 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 458 | * @scsidev: Device to which we are issuing command |
b095518e JG |
459 | * @arg: User provided data for issuing command |
460 | * | |
461 | * LOCKING: | |
462 | * Defined by the SCSI layer. We don't really care. | |
463 | * | |
464 | * RETURNS: | |
465 | * Zero on success, negative errno on error. | |
466 | */ | |
b095518e JG |
467 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
468 | { | |
469 | int rc = 0; | |
470 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 471 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 472 | int argsize = 0; |
85837ebd | 473 | enum dma_data_direction data_dir; |
bbe1fe7e | 474 | int cmd_result; |
b095518e | 475 | |
c893a3ae | 476 | if (arg == NULL) |
b095518e JG |
477 | return -EINVAL; |
478 | ||
479 | if (copy_from_user(args, arg, sizeof(args))) | |
480 | return -EFAULT; | |
481 | ||
bbe1fe7e ET |
482 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
483 | if (!sensebuf) | |
484 | return -ENOMEM; | |
485 | ||
b095518e JG |
486 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
487 | ||
488 | if (args[3]) { | |
489 | argsize = SECTOR_SIZE * args[3]; | |
490 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
491 | if (argbuf == NULL) { |
492 | rc = -ENOMEM; | |
493 | goto error; | |
494 | } | |
b095518e JG |
495 | |
496 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
497 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
2dcb407e | 498 | block count in sector count field */ |
85837ebd | 499 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
500 | } else { |
501 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 502 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 503 | data_dir = DMA_NONE; |
b095518e JG |
504 | } |
505 | ||
506 | scsi_cmd[0] = ATA_16; | |
507 | ||
508 | scsi_cmd[4] = args[2]; | |
a4f19040 | 509 | if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ |
b095518e JG |
510 | scsi_cmd[6] = args[3]; |
511 | scsi_cmd[8] = args[1]; | |
512 | scsi_cmd[10] = 0x4f; | |
513 | scsi_cmd[12] = 0xc2; | |
514 | } else { | |
515 | scsi_cmd[6] = args[1]; | |
516 | } | |
517 | scsi_cmd[14] = args[0]; | |
518 | ||
519 | /* Good values for timeout and retries? Values below | |
520 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e | 521 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
f4f4e47e | 522 | sensebuf, (10*HZ), 5, 0, NULL); |
bbe1fe7e ET |
523 | |
524 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
525 | u8 *desc = sensebuf + 8; | |
526 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
527 | ||
528 | /* If we set cc then ATA pass-through will cause a | |
529 | * check condition even if no error. Filter that. */ | |
530 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
531 | struct scsi_sense_hdr sshdr; | |
532 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
2dcb407e JG |
533 | &sshdr); |
534 | if (sshdr.sense_key == 0 && | |
535 | sshdr.asc == 0 && sshdr.ascq == 0) | |
bbe1fe7e ET |
536 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
537 | } | |
538 | ||
539 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
2dcb407e JG |
540 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ |
541 | desc[0] == 0x09) { /* code is "ATA Descriptor" */ | |
542 | args[0] = desc[13]; /* status */ | |
543 | args[1] = desc[3]; /* error */ | |
544 | args[2] = desc[5]; /* sector count (0:7) */ | |
bbe1fe7e ET |
545 | if (copy_to_user(arg, args, sizeof(args))) |
546 | rc = -EFAULT; | |
547 | } | |
548 | } | |
549 | ||
550 | ||
551 | if (cmd_result) { | |
b095518e JG |
552 | rc = -EIO; |
553 | goto error; | |
554 | } | |
555 | ||
b095518e | 556 | if ((argbuf) |
c893a3ae | 557 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
558 | rc = -EFAULT; |
559 | error: | |
bbe1fe7e | 560 | kfree(sensebuf); |
8f760780 | 561 | kfree(argbuf); |
b095518e JG |
562 | return rc; |
563 | } | |
564 | ||
565 | /** | |
566 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 567 | * @scsidev: Device to which we are issuing command |
b095518e JG |
568 | * @arg: User provided data for issuing command |
569 | * | |
570 | * LOCKING: | |
571 | * Defined by the SCSI layer. We don't really care. | |
572 | * | |
573 | * RETURNS: | |
574 | * Zero on success, negative errno on error. | |
575 | */ | |
576 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
577 | { | |
578 | int rc = 0; | |
579 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
580 | u8 args[7], *sensebuf = NULL; |
581 | int cmd_result; | |
b095518e | 582 | |
c893a3ae | 583 | if (arg == NULL) |
b095518e JG |
584 | return -EINVAL; |
585 | ||
586 | if (copy_from_user(args, arg, sizeof(args))) | |
587 | return -EFAULT; | |
588 | ||
af068bd1 DM |
589 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
590 | if (!sensebuf) | |
591 | return -ENOMEM; | |
592 | ||
b095518e JG |
593 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
594 | scsi_cmd[0] = ATA_16; | |
595 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 596 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
597 | scsi_cmd[4] = args[1]; |
598 | scsi_cmd[6] = args[2]; | |
599 | scsi_cmd[8] = args[3]; | |
600 | scsi_cmd[10] = args[4]; | |
601 | scsi_cmd[12] = args[5]; | |
277239f2 | 602 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
603 | scsi_cmd[14] = args[0]; |
604 | ||
b095518e | 605 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 606 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 | 607 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
f4f4e47e | 608 | sensebuf, (10*HZ), 5, 0, NULL); |
af068bd1 DM |
609 | |
610 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
611 | u8 *desc = sensebuf + 8; | |
612 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
613 | ||
614 | /* If we set cc then ATA pass-through will cause a | |
615 | * check condition even if no error. Filter that. */ | |
616 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
617 | struct scsi_sense_hdr sshdr; | |
618 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
619 | &sshdr); | |
2dcb407e JG |
620 | if (sshdr.sense_key == 0 && |
621 | sshdr.asc == 0 && sshdr.ascq == 0) | |
af068bd1 DM |
622 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
623 | } | |
624 | ||
625 | /* Send userspace ATA registers */ | |
626 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
627 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
628 | args[0] = desc[13]; /* status */ | |
629 | args[1] = desc[3]; /* error */ | |
630 | args[2] = desc[5]; /* sector count (0:7) */ | |
631 | args[3] = desc[7]; /* lbal */ | |
632 | args[4] = desc[9]; /* lbam */ | |
633 | args[5] = desc[11]; /* lbah */ | |
634 | args[6] = desc[12]; /* select */ | |
635 | if (copy_to_user(arg, args, sizeof(args))) | |
636 | rc = -EFAULT; | |
637 | } | |
638 | } | |
639 | ||
640 | if (cmd_result) { | |
b095518e | 641 | rc = -EIO; |
af068bd1 DM |
642 | goto error; |
643 | } | |
b095518e | 644 | |
af068bd1 DM |
645 | error: |
646 | kfree(sensebuf); | |
b095518e JG |
647 | return rc; |
648 | } | |
649 | ||
94be9a58 JG |
650 | int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, |
651 | int cmd, void __user *arg) | |
1da177e4 | 652 | { |
1da177e4 LT |
653 | int val = -EINVAL, rc = -EINVAL; |
654 | ||
1da177e4 LT |
655 | switch (cmd) { |
656 | case ATA_IOC_GET_IO32: | |
657 | val = 0; | |
658 | if (copy_to_user(arg, &val, 1)) | |
659 | return -EFAULT; | |
660 | return 0; | |
661 | ||
662 | case ATA_IOC_SET_IO32: | |
663 | val = (unsigned long) arg; | |
664 | if (val != 0) | |
665 | return -EINVAL; | |
666 | return 0; | |
667 | ||
5924b74c | 668 | case HDIO_GET_IDENTITY: |
94be9a58 | 669 | return ata_get_identity(ap, scsidev, arg); |
5924b74c | 670 | |
b095518e JG |
671 | case HDIO_DRIVE_CMD: |
672 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
673 | return -EACCES; | |
674 | return ata_cmd_ioctl(scsidev, arg); | |
675 | ||
676 | case HDIO_DRIVE_TASK: | |
677 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
678 | return -EACCES; | |
679 | return ata_task_ioctl(scsidev, arg); | |
680 | ||
1da177e4 LT |
681 | default: |
682 | rc = -ENOTTY; | |
683 | break; | |
684 | } | |
685 | ||
1da177e4 LT |
686 | return rc; |
687 | } | |
94be9a58 JG |
688 | EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); |
689 | ||
690 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
691 | { | |
692 | return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), | |
693 | scsidev, cmd, arg); | |
694 | } | |
695 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); | |
1da177e4 LT |
696 | |
697 | /** | |
698 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
699 | * @dev: ATA device to which the new command is attached |
700 | * @cmd: SCSI command that originated this ATA command | |
701 | * @done: SCSI command completion function | |
702 | * | |
703 | * Obtain a reference to an unused ata_queued_cmd structure, | |
704 | * which is the basic libata structure representing a single | |
705 | * ATA command sent to the hardware. | |
706 | * | |
707 | * If a command was available, fill in the SCSI-specific | |
708 | * portions of the structure with information on the | |
709 | * current command. | |
710 | * | |
711 | * LOCKING: | |
cca3974e | 712 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
713 | * |
714 | * RETURNS: | |
715 | * Command allocated, or %NULL if none available. | |
716 | */ | |
7102d230 AB |
717 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
718 | struct scsi_cmnd *cmd, | |
719 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
720 | { |
721 | struct ata_queued_cmd *qc; | |
722 | ||
8a8bc223 | 723 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
724 | if (qc) { |
725 | qc->scsicmd = cmd; | |
726 | qc->scsidone = done; | |
727 | ||
ff2aeb1e | 728 | qc->sg = scsi_sglist(cmd); |
7120165c | 729 | qc->n_elem = scsi_sg_count(cmd); |
1da177e4 LT |
730 | } else { |
731 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
732 | done(cmd); | |
733 | } | |
734 | ||
735 | return qc; | |
736 | } | |
737 | ||
aacda375 TH |
738 | static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) |
739 | { | |
740 | struct scsi_cmnd *scmd = qc->scsicmd; | |
741 | ||
742 | qc->extrabytes = scmd->request->extra_len; | |
743 | qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; | |
744 | } | |
745 | ||
b095518e JG |
746 | /** |
747 | * ata_dump_status - user friendly display of error info | |
748 | * @id: id of the port in question | |
749 | * @tf: ptr to filled out taskfile | |
750 | * | |
751 | * Decode and dump the ATA error/status registers for the user so | |
752 | * that they have some idea what really happened at the non | |
753 | * make-believe layer. | |
754 | * | |
755 | * LOCKING: | |
756 | * inherited from caller | |
757 | */ | |
7102d230 | 758 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
759 | { |
760 | u8 stat = tf->command, err = tf->feature; | |
761 | ||
762 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
763 | if (stat & ATA_BUSY) { | |
764 | printk("Busy }\n"); /* Data is not valid in this case */ | |
765 | } else { | |
766 | if (stat & 0x40) printk("DriveReady "); | |
767 | if (stat & 0x20) printk("DeviceFault "); | |
768 | if (stat & 0x10) printk("SeekComplete "); | |
769 | if (stat & 0x08) printk("DataRequest "); | |
770 | if (stat & 0x04) printk("CorrectedError "); | |
771 | if (stat & 0x02) printk("Index "); | |
772 | if (stat & 0x01) printk("Error "); | |
773 | printk("}\n"); | |
774 | ||
775 | if (err) { | |
776 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
777 | if (err & 0x04) printk("DriveStatusError "); | |
778 | if (err & 0x80) { | |
779 | if (err & 0x04) printk("BadCRC "); | |
780 | else printk("Sector "); | |
781 | } | |
782 | if (err & 0x40) printk("UncorrectableError "); | |
783 | if (err & 0x10) printk("SectorIdNotFound "); | |
784 | if (err & 0x02) printk("TrackZeroNotFound "); | |
785 | if (err & 0x01) printk("AddrMarkNotFound "); | |
786 | printk("}\n"); | |
787 | } | |
788 | } | |
789 | } | |
790 | ||
1da177e4 LT |
791 | /** |
792 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 793 | * @id: ATA device number |
1da177e4 | 794 | * @drv_stat: value contained in ATA status register |
b095518e JG |
795 | * @drv_err: value contained in ATA error register |
796 | * @sk: the sense key we'll fill out | |
797 | * @asc: the additional sense code we'll fill out | |
798 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 799 | * @verbose: be verbose |
1da177e4 | 800 | * |
b095518e JG |
801 | * Converts an ATA error into a SCSI error. Fill out pointers to |
802 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
803 | * format sense blocks. | |
1da177e4 LT |
804 | * |
805 | * LOCKING: | |
cca3974e | 806 | * spin_lock_irqsave(host lock) |
1da177e4 | 807 | */ |
7102d230 AB |
808 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
809 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 810 | { |
b095518e | 811 | int i; |
ffe75ef6 | 812 | |
1da177e4 | 813 | /* Based on the 3ware driver translation table */ |
98ac62de | 814 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
815 | /* BBD|ECC|ID|MAR */ |
816 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
817 | /* BBD|ECC|ID */ | |
818 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
819 | /* ECC|MC|MARK */ | |
820 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
821 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
822 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
823 | /* MC|ID|ABRT|TRK0|MARK */ | |
824 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
825 | /* MCR|MARK */ | |
826 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
827 | /* Bad address mark */ | |
828 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
829 | /* TRK0 */ | |
830 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
831 | /* Abort & !ICRC */ | |
832 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
833 | /* Media change request */ | |
834 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
835 | /* SRV */ | |
836 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
837 | /* Media change */ | |
838 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
839 | /* ECC */ | |
840 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
841 | /* BBD - block marked bad */ | |
842 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
843 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
844 | }; | |
98ac62de | 845 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
846 | /* Must be first because BUSY means no other bits valid */ |
847 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
848 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
849 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
850 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
851 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
852 | }; | |
1da177e4 | 853 | |
1da177e4 LT |
854 | /* |
855 | * Is this an error we can process/parse | |
856 | */ | |
b095518e JG |
857 | if (drv_stat & ATA_BUSY) { |
858 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 859 | } |
b095518e JG |
860 | |
861 | if (drv_err) { | |
862 | /* Look for drv_err */ | |
863 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
864 | /* Look for best matches first */ | |
2e9edbf8 | 865 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
866 | sense_table[i][0]) { |
867 | *sk = sense_table[i][1]; | |
868 | *asc = sense_table[i][2]; | |
869 | *ascq = sense_table[i][3]; | |
870 | goto translate_done; | |
871 | } | |
872 | } | |
873 | /* No immediate match */ | |
246619da TH |
874 | if (verbose) |
875 | printk(KERN_WARNING "ata%u: no sense translation for " | |
876 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 877 | } |
b095518e JG |
878 | |
879 | /* Fall back to interpreting status bits */ | |
880 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
881 | if (stat_table[i][0] & drv_stat) { | |
882 | *sk = stat_table[i][1]; | |
883 | *asc = stat_table[i][2]; | |
884 | *ascq = stat_table[i][3]; | |
885 | goto translate_done; | |
1da177e4 | 886 | } |
b095518e JG |
887 | } |
888 | /* No error? Undecoded? */ | |
246619da TH |
889 | if (verbose) |
890 | printk(KERN_WARNING "ata%u: no sense translation for " | |
891 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 892 | |
2d202024 AC |
893 | /* We need a sensible error return here, which is tricky, and one |
894 | that won't cause people to do things like return a disk wrongly */ | |
895 | *sk = ABORTED_COMMAND; | |
896 | *asc = 0x00; | |
897 | *ascq = 0x00; | |
b095518e JG |
898 | |
899 | translate_done: | |
246619da TH |
900 | if (verbose) |
901 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
902 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
903 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
904 | return; |
905 | } | |
906 | ||
907 | /* | |
750426aa | 908 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
909 | * @qc: Command that completed. |
910 | * | |
911 | * This function is specific to the ATA descriptor format sense | |
912 | * block specified for the ATA pass through commands. Regardless | |
913 | * of whether the command errored or not, return a sense | |
914 | * block. Copy all controller registers into the sense | |
915 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
916 | * | |
917 | * LOCKING: | |
750426aa | 918 | * None. |
b095518e | 919 | */ |
750426aa | 920 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
921 | { |
922 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 923 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
924 | unsigned char *sb = cmd->sense_buffer; |
925 | unsigned char *desc = sb + 8; | |
246619da | 926 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
927 | |
928 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
929 | ||
0e5dec47 | 930 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 931 | |
b095518e JG |
932 | /* |
933 | * Use ata_to_sense_error() to map status register bits | |
934 | * onto sense key, asc & ascq. | |
935 | */ | |
058e55e1 TH |
936 | if (qc->err_mask || |
937 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 938 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 939 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 940 | sb[1] &= 0x0f; |
1da177e4 LT |
941 | } |
942 | ||
b095518e JG |
943 | /* |
944 | * Sense data is current and format is descriptor. | |
945 | */ | |
946 | sb[0] = 0x72; | |
1da177e4 | 947 | |
b095518e JG |
948 | desc[0] = 0x09; |
949 | ||
f38621b3 TH |
950 | /* set length of additional sense data */ |
951 | sb[7] = 14; | |
952 | desc[1] = 12; | |
b095518e JG |
953 | |
954 | /* | |
955 | * Copy registers into sense buffer. | |
956 | */ | |
957 | desc[2] = 0x00; | |
958 | desc[3] = tf->feature; /* == error reg */ | |
959 | desc[5] = tf->nsect; | |
960 | desc[7] = tf->lbal; | |
961 | desc[9] = tf->lbam; | |
962 | desc[11] = tf->lbah; | |
963 | desc[12] = tf->device; | |
964 | desc[13] = tf->command; /* == status reg */ | |
965 | ||
966 | /* | |
967 | * Fill in Extend bit, and the high order bytes | |
968 | * if applicable. | |
969 | */ | |
970 | if (tf->flags & ATA_TFLAG_LBA48) { | |
971 | desc[2] |= 0x01; | |
972 | desc[4] = tf->hob_nsect; | |
973 | desc[6] = tf->hob_lbal; | |
974 | desc[8] = tf->hob_lbam; | |
975 | desc[10] = tf->hob_lbah; | |
1da177e4 | 976 | } |
b095518e | 977 | } |
1da177e4 | 978 | |
b095518e | 979 | /** |
750426aa | 980 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
981 | * @qc: Command that we are erroring out |
982 | * | |
d25614ba TH |
983 | * Generate sense block for a failed ATA command @qc. Descriptor |
984 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
985 | * |
986 | * LOCKING: | |
750426aa | 987 | * None. |
b095518e | 988 | */ |
750426aa | 989 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 990 | { |
d25614ba | 991 | struct ata_device *dev = qc->dev; |
b095518e | 992 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 993 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 994 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 995 | unsigned char *desc = sb + 8; |
246619da | 996 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 997 | u64 block; |
b095518e JG |
998 | |
999 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
1000 | ||
0e5dec47 | 1001 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 1002 | |
d25614ba TH |
1003 | /* sense data is current and format is descriptor */ |
1004 | sb[0] = 0x72; | |
1005 | ||
1006 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
1007 | * onto sense key, asc & ascq. |
1008 | */ | |
058e55e1 TH |
1009 | if (qc->err_mask || |
1010 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 1011 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
1012 | &sb[1], &sb[2], &sb[3], verbose); |
1013 | sb[1] &= 0x0f; | |
1da177e4 | 1014 | } |
1da177e4 | 1015 | |
d25614ba | 1016 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 1017 | |
d25614ba TH |
1018 | /* information sense data descriptor */ |
1019 | sb[7] = 12; | |
1020 | desc[0] = 0x00; | |
1021 | desc[1] = 10; | |
a7dac447 | 1022 | |
d25614ba TH |
1023 | desc[2] |= 0x80; /* valid */ |
1024 | desc[6] = block >> 40; | |
1025 | desc[7] = block >> 32; | |
1026 | desc[8] = block >> 24; | |
1027 | desc[9] = block >> 16; | |
1028 | desc[10] = block >> 8; | |
1029 | desc[11] = block; | |
1da177e4 LT |
1030 | } |
1031 | ||
a6cce2a7 BK |
1032 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
1033 | { | |
1034 | sdev->use_10_for_rw = 1; | |
1035 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
1036 | |
1037 | /* Schedule policy is determined by ->qc_defer() callback and | |
1038 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
1039 | * prevent SCSI midlayer from automatically deferring | |
1040 | * requests. | |
1041 | */ | |
1042 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
1043 | } |
1044 | ||
fa2fc7f4 JB |
1045 | /** |
1046 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 1047 | * @rq: request to be checked |
fa2fc7f4 JB |
1048 | * |
1049 | * ATAPI commands which transfer variable length data to host | |
1050 | * might overflow due to application error or hardare bug. This | |
1051 | * function checks whether overflow should be drained and ignored | |
1052 | * for @request. | |
1053 | * | |
1054 | * LOCKING: | |
1055 | * None. | |
1056 | * | |
1057 | * RETURNS: | |
1058 | * 1 if ; otherwise, 0. | |
1059 | */ | |
1060 | static int atapi_drain_needed(struct request *rq) | |
1061 | { | |
1062 | if (likely(!blk_pc_request(rq))) | |
1063 | return 0; | |
1064 | ||
1065 | if (!rq->data_len || (rq->cmd_flags & REQ_RW)) | |
1066 | return 0; | |
1067 | ||
1068 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
1069 | } | |
1070 | ||
1071 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
1072 | struct ata_device *dev) | |
a6cce2a7 | 1073 | { |
45fabbb7 EO |
1074 | if (!ata_id_has_unload(dev->id)) |
1075 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
1076 | ||
914ed354 TH |
1077 | /* configure max sectors */ |
1078 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 1079 | |
fa2fc7f4 JB |
1080 | if (dev->class == ATA_DEV_ATAPI) { |
1081 | struct request_queue *q = sdev->request_queue; | |
1082 | void *buf; | |
1083 | ||
e3790c7d | 1084 | /* set the min alignment and padding */ |
d0ad3bc9 JB |
1085 | blk_queue_update_dma_alignment(sdev->request_queue, |
1086 | ATA_DMA_PAD_SZ - 1); | |
27f8221a FT |
1087 | blk_queue_update_dma_pad(sdev->request_queue, |
1088 | ATA_DMA_PAD_SZ - 1); | |
fa2fc7f4 JB |
1089 | |
1090 | /* configure draining */ | |
1091 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
1092 | if (!buf) { | |
1093 | ata_dev_printk(dev, KERN_ERR, | |
1094 | "drain buffer allocation failed\n"); | |
1095 | return -ENOMEM; | |
1096 | } | |
1097 | ||
1098 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
1099 | } else { | |
8bff7c6b JA |
1100 | if (ata_id_is_ssd(dev->id)) |
1101 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, | |
1102 | sdev->request_queue); | |
1103 | ||
d0ad3bc9 JB |
1104 | /* ATA devices must be sector aligned */ |
1105 | blk_queue_update_dma_alignment(sdev->request_queue, | |
1106 | ATA_SECT_SIZE - 1); | |
d8cf5389 | 1107 | sdev->manage_start_stop = 1; |
dde20207 | 1108 | } |
d8cf5389 | 1109 | |
f26792d5 JG |
1110 | if (dev->flags & ATA_DFLAG_AN) |
1111 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
1112 | ||
a6e6ce8e TH |
1113 | if (dev->flags & ATA_DFLAG_NCQ) { |
1114 | int depth; | |
1115 | ||
1116 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
1117 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
8a8bc223 | 1118 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); |
a6e6ce8e | 1119 | } |
fa2fc7f4 JB |
1120 | |
1121 | return 0; | |
a6cce2a7 BK |
1122 | } |
1123 | ||
1da177e4 LT |
1124 | /** |
1125 | * ata_scsi_slave_config - Set SCSI device attributes | |
1126 | * @sdev: SCSI device to examine | |
1127 | * | |
1128 | * This is called before we actually start reading | |
1129 | * and writing to the device, to configure certain | |
1130 | * SCSI mid-layer behaviors. | |
1131 | * | |
1132 | * LOCKING: | |
1133 | * Defined by SCSI layer. We don't really care. | |
1134 | */ | |
1135 | ||
1136 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
1137 | { | |
31534363 TH |
1138 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
1139 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 1140 | int rc = 0; |
31534363 | 1141 | |
a6cce2a7 | 1142 | ata_scsi_sdev_config(sdev); |
1da177e4 | 1143 | |
31534363 | 1144 | if (dev) |
fa2fc7f4 | 1145 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 1146 | |
fa2fc7f4 | 1147 | return rc; |
1da177e4 LT |
1148 | } |
1149 | ||
83c47bcb TH |
1150 | /** |
1151 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
1152 | * @sdev: SCSI device to be destroyed | |
1153 | * | |
1154 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
1155 | * this unplugging was initiated by libata as indicated by NULL | |
1156 | * dev->sdev, this function doesn't have to do anything. | |
1157 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
1158 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
1159 | * EH. | |
1160 | * | |
1161 | * LOCKING: | |
1162 | * Defined by SCSI layer. We don't really care. | |
1163 | */ | |
1164 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
1165 | { | |
1166 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 1167 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
1168 | unsigned long flags; |
1169 | struct ata_device *dev; | |
1170 | ||
1171 | if (!ap->ops->error_handler) | |
1172 | return; | |
1173 | ||
ba6a1308 | 1174 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
1175 | dev = __ata_scsi_find_dev(ap, sdev); |
1176 | if (dev && dev->sdev) { | |
1177 | /* SCSI device already in CANCEL state, no need to offline it */ | |
1178 | dev->sdev = NULL; | |
1179 | dev->flags |= ATA_DFLAG_DETACH; | |
1180 | ata_port_schedule_eh(ap); | |
1181 | } | |
ba6a1308 | 1182 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
1183 | |
1184 | kfree(q->dma_drain_buffer); | |
1185 | q->dma_drain_buffer = NULL; | |
1186 | q->dma_drain_size = 0; | |
83c47bcb TH |
1187 | } |
1188 | ||
a6e6ce8e TH |
1189 | /** |
1190 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
1191 | * @sdev: SCSI device to configure queue depth for | |
1192 | * @queue_depth: new queue depth | |
1193 | * | |
1194 | * This is libata standard hostt->change_queue_depth callback. | |
1195 | * SCSI will call into this callback when user tries to set queue | |
1196 | * depth via sysfs. | |
1197 | * | |
1198 | * LOCKING: | |
1199 | * SCSI layer (we don't care) | |
1200 | * | |
1201 | * RETURNS: | |
1202 | * Newly configured queue depth. | |
1203 | */ | |
1204 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
1205 | { | |
1206 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
1207 | struct ata_device *dev; | |
360f654e | 1208 | unsigned long flags; |
a6e6ce8e | 1209 | |
c3c70c44 | 1210 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
1211 | return sdev->queue_depth; |
1212 | ||
1213 | dev = ata_scsi_find_dev(ap, sdev); | |
1214 | if (!dev || !ata_dev_enabled(dev)) | |
1215 | return sdev->queue_depth; | |
1216 | ||
c3c70c44 | 1217 | /* NCQ enabled? */ |
360f654e | 1218 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
1219 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
1220 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 1221 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
1222 | queue_depth = 1; |
1223 | } | |
360f654e TH |
1224 | spin_unlock_irqrestore(ap->lock, flags); |
1225 | ||
c3c70c44 TH |
1226 | /* limit and apply queue depth */ |
1227 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1228 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1229 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1230 | ||
1231 | if (sdev->queue_depth == queue_depth) | |
1232 | return -EINVAL; | |
1233 | ||
1234 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1235 | return queue_depth; |
1236 | } | |
1237 | ||
d9aca22c | 1238 | /* XXX: for spindown warning */ |
da071b42 TH |
1239 | static void ata_delayed_done_timerfn(unsigned long arg) |
1240 | { | |
1241 | struct scsi_cmnd *scmd = (void *)arg; | |
1242 | ||
1243 | scmd->scsi_done(scmd); | |
1244 | } | |
1245 | ||
d9aca22c | 1246 | /* XXX: for spindown warning */ |
da071b42 TH |
1247 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
1248 | { | |
1249 | static struct timer_list timer; | |
1250 | ||
1251 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
1252 | mod_timer(&timer, jiffies + 5 * HZ); | |
1253 | } | |
1254 | ||
972dcafb DG |
1255 | /** |
1256 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1257 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1258 | * |
1259 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1260 | * (to start). Perhaps these commands should be preceded by | |
1261 | * CHECK POWER MODE to see what power mode the device is already in. | |
1262 | * [See SAT revision 5 at www.t10.org] | |
1263 | * | |
1264 | * LOCKING: | |
cca3974e | 1265 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1266 | * |
1267 | * RETURNS: | |
1268 | * Zero on success, non-zero on error. | |
1269 | */ | |
ad706991 | 1270 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1271 | { |
542b1444 | 1272 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1273 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1274 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1275 | |
2e5704f6 TH |
1276 | if (scmd->cmd_len < 5) |
1277 | goto invalid_fld; | |
1278 | ||
972dcafb DG |
1279 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1280 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1281 | if (cdb[1] & 0x1) { |
972dcafb DG |
1282 | ; /* ignore IMMED bit, violates sat-r05 */ |
1283 | } | |
542b1444 | 1284 | if (cdb[4] & 0x2) |
ae006510 | 1285 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1286 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1287 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 | 1288 | |
542b1444 | 1289 | if (cdb[4] & 0x1) { |
972dcafb | 1290 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1291 | |
1292 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1293 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1294 | |
1295 | tf->lbah = 0x0; | |
1296 | tf->lbam = 0x0; | |
1297 | tf->lbal = 0x0; | |
1298 | tf->device |= ATA_LBA; | |
1299 | } else { | |
1300 | /* CHS */ | |
1301 | tf->lbal = 0x1; /* sect */ | |
1302 | tf->lbam = 0x0; /* cyl low */ | |
1303 | tf->lbah = 0x0; /* cyl high */ | |
1304 | } | |
1305 | ||
972dcafb | 1306 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 | 1307 | } else { |
2a6e58d2 RW |
1308 | /* Some odd clown BIOSen issue spindown on power off (ACPI S4 |
1309 | * or S5) causing some drives to spin up and down again. | |
1310 | */ | |
1311 | if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && | |
1312 | system_state == SYSTEM_POWER_OFF) | |
1313 | goto skip; | |
1314 | ||
1315 | if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && | |
1316 | system_entering_hibernation()) | |
1317 | goto skip; | |
1318 | ||
920a4b10 TH |
1319 | /* XXX: This is for backward compatibility, will be |
1320 | * removed. Read Documentation/feature-removal-schedule.txt | |
1321 | * for more info. | |
1322 | */ | |
d9aca22c | 1323 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
1324 | (system_state == SYSTEM_HALT || |
1325 | system_state == SYSTEM_POWER_OFF)) { | |
2dcb407e | 1326 | static unsigned long warned; |
920a4b10 | 1327 | |
da071b42 | 1328 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
1329 | ata_dev_printk(qc->dev, KERN_WARNING, |
1330 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
1331 | "UPDATE SHUTDOWN UTILITY\n"); | |
1332 | ata_dev_printk(qc->dev, KERN_WARNING, | |
1333 | "For more info, visit " | |
1334 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
1335 | |
1336 | /* ->scsi_done is not used, use it for | |
1337 | * delayed completion. | |
1338 | */ | |
1339 | scmd->scsi_done = qc->scsidone; | |
1340 | qc->scsidone = ata_delayed_done; | |
920a4b10 | 1341 | } |
2a6e58d2 | 1342 | goto skip; |
920a4b10 TH |
1343 | } |
1344 | ||
78981a7c RH |
1345 | /* Issue ATA STANDBY IMMEDIATE command */ |
1346 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1347 | } |
78981a7c | 1348 | |
972dcafb DG |
1349 | /* |
1350 | * Standby and Idle condition timers could be implemented but that | |
1351 | * would require libata to implement the Power condition mode page | |
1352 | * and allow the user to change it. Changing mode pages requires | |
1353 | * MODE SELECT to be implemented. | |
1354 | */ | |
1355 | ||
1356 | return 0; | |
ae006510 | 1357 | |
2a6e58d2 | 1358 | invalid_fld: |
542b1444 | 1359 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1360 | /* "Invalid field in cbd" */ |
1361 | return 1; | |
2a6e58d2 RW |
1362 | skip: |
1363 | scmd->result = SAM_STAT_GOOD; | |
1364 | return 1; | |
972dcafb DG |
1365 | } |
1366 | ||
1367 | ||
1da177e4 LT |
1368 | /** |
1369 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1370 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1371 | * |
1372 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1373 | * FLUSH CACHE EXT. | |
1374 | * | |
1375 | * LOCKING: | |
cca3974e | 1376 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1377 | * |
1378 | * RETURNS: | |
1379 | * Zero on success, non-zero on error. | |
1380 | */ | |
ad706991 | 1381 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1382 | { |
1383 | struct ata_taskfile *tf = &qc->tf; | |
1384 | ||
1385 | tf->flags |= ATA_TFLAG_DEVICE; | |
1386 | tf->protocol = ATA_PROT_NODATA; | |
1387 | ||
6fc49adb | 1388 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1389 | tf->command = ATA_CMD_FLUSH_EXT; |
1390 | else | |
1391 | tf->command = ATA_CMD_FLUSH; | |
1392 | ||
b666da35 TH |
1393 | /* flush is critical for IO integrity, consider it an IO command */ |
1394 | qc->flags |= ATA_QCFLAG_IO; | |
1395 | ||
1da177e4 LT |
1396 | return 0; |
1397 | } | |
1398 | ||
3aef5231 AL |
1399 | /** |
1400 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1401 | * @cdb: SCSI command to translate |
3aef5231 AL |
1402 | * |
1403 | * Calculate LBA and transfer length for 6-byte commands. | |
1404 | * | |
1405 | * RETURNS: | |
1406 | * @plba: the LBA | |
1407 | * @plen: the transfer length | |
1408 | */ | |
542b1444 | 1409 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1410 | { |
1411 | u64 lba = 0; | |
6c7b7d2b | 1412 | u32 len; |
3aef5231 AL |
1413 | |
1414 | VPRINTK("six-byte command\n"); | |
1415 | ||
6c7b7d2b | 1416 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1417 | lba |= ((u64)cdb[2]) << 8; |
1418 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1419 | |
6c7b7d2b | 1420 | len = cdb[4]; |
3aef5231 AL |
1421 | |
1422 | *plba = lba; | |
1423 | *plen = len; | |
1424 | } | |
1425 | ||
1426 | /** | |
1427 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1428 | * @cdb: SCSI command to translate |
3aef5231 AL |
1429 | * |
1430 | * Calculate LBA and transfer length for 10-byte commands. | |
1431 | * | |
1432 | * RETURNS: | |
1433 | * @plba: the LBA | |
1434 | * @plen: the transfer length | |
1435 | */ | |
542b1444 | 1436 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1437 | { |
1438 | u64 lba = 0; | |
1439 | u32 len = 0; | |
1440 | ||
1441 | VPRINTK("ten-byte command\n"); | |
1442 | ||
542b1444 TH |
1443 | lba |= ((u64)cdb[2]) << 24; |
1444 | lba |= ((u64)cdb[3]) << 16; | |
1445 | lba |= ((u64)cdb[4]) << 8; | |
1446 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1447 | |
542b1444 TH |
1448 | len |= ((u32)cdb[7]) << 8; |
1449 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1450 | |
1451 | *plba = lba; | |
1452 | *plen = len; | |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1457 | * @cdb: SCSI command to translate |
3aef5231 AL |
1458 | * |
1459 | * Calculate LBA and transfer length for 16-byte commands. | |
1460 | * | |
1461 | * RETURNS: | |
1462 | * @plba: the LBA | |
1463 | * @plen: the transfer length | |
1464 | */ | |
542b1444 | 1465 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1466 | { |
1467 | u64 lba = 0; | |
1468 | u32 len = 0; | |
1469 | ||
1470 | VPRINTK("sixteen-byte command\n"); | |
1471 | ||
542b1444 TH |
1472 | lba |= ((u64)cdb[2]) << 56; |
1473 | lba |= ((u64)cdb[3]) << 48; | |
1474 | lba |= ((u64)cdb[4]) << 40; | |
1475 | lba |= ((u64)cdb[5]) << 32; | |
1476 | lba |= ((u64)cdb[6]) << 24; | |
1477 | lba |= ((u64)cdb[7]) << 16; | |
1478 | lba |= ((u64)cdb[8]) << 8; | |
1479 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1480 | |
542b1444 TH |
1481 | len |= ((u32)cdb[10]) << 24; |
1482 | len |= ((u32)cdb[11]) << 16; | |
1483 | len |= ((u32)cdb[12]) << 8; | |
1484 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1485 | |
1486 | *plba = lba; | |
1487 | *plen = len; | |
1488 | } | |
1489 | ||
1da177e4 LT |
1490 | /** |
1491 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1492 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1493 | * |
1494 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1495 | * | |
1496 | * LOCKING: | |
cca3974e | 1497 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1498 | * |
1499 | * RETURNS: | |
1500 | * Zero on success, non-zero on error. | |
1501 | */ | |
ad706991 | 1502 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1503 | { |
542b1444 | 1504 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1505 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1506 | struct ata_device *dev = qc->dev; |
1da177e4 | 1507 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1508 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1509 | u64 block; |
1510 | u32 n_block; | |
1da177e4 LT |
1511 | |
1512 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1513 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1514 | |
2e5704f6 TH |
1515 | if (cdb[0] == VERIFY) { |
1516 | if (scmd->cmd_len < 10) | |
1517 | goto invalid_fld; | |
542b1444 | 1518 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1519 | } else if (cdb[0] == VERIFY_16) { |
1520 | if (scmd->cmd_len < 16) | |
1521 | goto invalid_fld; | |
542b1444 | 1522 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1523 | } else |
ae006510 | 1524 | goto invalid_fld; |
1da177e4 | 1525 | |
8bf62ece | 1526 | if (!n_block) |
ae006510 | 1527 | goto nothing_to_do; |
8bf62ece | 1528 | if (block >= dev_sectors) |
ae006510 | 1529 | goto out_of_range; |
8bf62ece | 1530 | if ((block + n_block) > dev_sectors) |
ae006510 | 1531 | goto out_of_range; |
1da177e4 | 1532 | |
07506697 AL |
1533 | if (dev->flags & ATA_DFLAG_LBA) { |
1534 | tf->flags |= ATA_TFLAG_LBA; | |
1535 | ||
c6a33e24 AL |
1536 | if (lba_28_ok(block, n_block)) { |
1537 | /* use LBA28 */ | |
1538 | tf->command = ATA_CMD_VERIFY; | |
1539 | tf->device |= (block >> 24) & 0xf; | |
1540 | } else if (lba_48_ok(block, n_block)) { | |
1541 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1542 | goto out_of_range; | |
07506697 AL |
1543 | |
1544 | /* use LBA48 */ | |
1545 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1546 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1547 | |
8bf62ece | 1548 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1549 | |
8bf62ece AL |
1550 | tf->hob_lbah = (block >> 40) & 0xff; |
1551 | tf->hob_lbam = (block >> 32) & 0xff; | |
1552 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1553 | } else |
1554 | /* request too large even for LBA48 */ | |
1555 | goto out_of_range; | |
8bf62ece AL |
1556 | |
1557 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1558 | |
8bf62ece AL |
1559 | tf->lbah = (block >> 16) & 0xff; |
1560 | tf->lbam = (block >> 8) & 0xff; | |
1561 | tf->lbal = block & 0xff; | |
1da177e4 | 1562 | |
8bf62ece AL |
1563 | tf->device |= ATA_LBA; |
1564 | } else { | |
1565 | /* CHS */ | |
1566 | u32 sect, head, cyl, track; | |
1567 | ||
c6a33e24 AL |
1568 | if (!lba_28_ok(block, n_block)) |
1569 | goto out_of_range; | |
07506697 | 1570 | |
8bf62ece AL |
1571 | /* Convert LBA to CHS */ |
1572 | track = (u32)block / dev->sectors; | |
1573 | cyl = track / dev->heads; | |
1574 | head = track % dev->heads; | |
1575 | sect = (u32)block % dev->sectors + 1; | |
1576 | ||
c187c4b5 AL |
1577 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1578 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1579 | |
1580 | /* Check whether the converted CHS can fit. | |
1581 | Cylinder: 0-65535 | |
8bf62ece AL |
1582 | Head: 0-15 |
1583 | Sector: 1-255*/ | |
2e9edbf8 | 1584 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1585 | goto out_of_range; |
2e9edbf8 | 1586 | |
8bf62ece AL |
1587 | tf->command = ATA_CMD_VERIFY; |
1588 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1589 | tf->lbal = sect; | |
1590 | tf->lbam = cyl; | |
1591 | tf->lbah = cyl >> 8; | |
1592 | tf->device |= head; | |
1593 | } | |
1da177e4 LT |
1594 | |
1595 | return 0; | |
ae006510 DG |
1596 | |
1597 | invalid_fld: | |
542b1444 | 1598 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1599 | /* "Invalid field in cbd" */ |
1600 | return 1; | |
1601 | ||
1602 | out_of_range: | |
542b1444 | 1603 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1604 | /* "Logical Block Address out of range" */ |
1605 | return 1; | |
1606 | ||
1607 | nothing_to_do: | |
542b1444 | 1608 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1609 | return 1; |
1da177e4 LT |
1610 | } |
1611 | ||
1612 | /** | |
1613 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1614 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1615 | * |
1616 | * Converts any of six SCSI read/write commands into the | |
1617 | * ATA counterpart, including starting sector (LBA), | |
1618 | * sector count, and taking into account the device's LBA48 | |
1619 | * support. | |
1620 | * | |
1621 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1622 | * %WRITE_16 are currently supported. | |
1623 | * | |
1624 | * LOCKING: | |
cca3974e | 1625 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1626 | * |
1627 | * RETURNS: | |
1628 | * Zero on success, non-zero on error. | |
1629 | */ | |
ad706991 | 1630 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1631 | { |
542b1444 | 1632 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1633 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1634 | unsigned int tf_flags = 0; |
3aef5231 AL |
1635 | u64 block; |
1636 | u32 n_block; | |
bd056d7e | 1637 | int rc; |
1da177e4 | 1638 | |
542b1444 | 1639 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1640 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1641 | |
9a3dccc4 | 1642 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1643 | switch (cdb[0]) { |
3aef5231 AL |
1644 | case READ_10: |
1645 | case WRITE_10: | |
2e5704f6 TH |
1646 | if (unlikely(scmd->cmd_len < 10)) |
1647 | goto invalid_fld; | |
542b1444 TH |
1648 | scsi_10_lba_len(cdb, &block, &n_block); |
1649 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1650 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1651 | break; |
1652 | case READ_6: | |
1653 | case WRITE_6: | |
2e5704f6 TH |
1654 | if (unlikely(scmd->cmd_len < 6)) |
1655 | goto invalid_fld; | |
542b1444 | 1656 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1657 | |
1658 | /* for 6-byte r/w commands, transfer length 0 | |
1659 | * means 256 blocks of data, not 0 block. | |
1660 | */ | |
76b2bf9b JG |
1661 | if (!n_block) |
1662 | n_block = 256; | |
3aef5231 AL |
1663 | break; |
1664 | case READ_16: | |
1665 | case WRITE_16: | |
2e5704f6 TH |
1666 | if (unlikely(scmd->cmd_len < 16)) |
1667 | goto invalid_fld; | |
542b1444 TH |
1668 | scsi_16_lba_len(cdb, &block, &n_block); |
1669 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1670 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1671 | break; |
1672 | default: | |
8bf62ece | 1673 | DPRINTK("no-byte command\n"); |
ae006510 | 1674 | goto invalid_fld; |
1da177e4 LT |
1675 | } |
1676 | ||
8bf62ece AL |
1677 | /* Check and compose ATA command */ |
1678 | if (!n_block) | |
c187c4b5 AL |
1679 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1680 | * length 0 means transfer 0 block of data. | |
1681 | * However, for ATA R/W commands, sector count 0 means | |
1682 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1683 | * |
1684 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1685 | */ |
ae006510 | 1686 | goto nothing_to_do; |
1da177e4 | 1687 | |
bd056d7e | 1688 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1689 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1690 | |
bd056d7e TH |
1691 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1692 | qc->tag); | |
1693 | if (likely(rc == 0)) | |
1694 | return 0; | |
ae006510 | 1695 | |
bd056d7e TH |
1696 | if (rc == -ERANGE) |
1697 | goto out_of_range; | |
1698 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1699 | invalid_fld: |
542b1444 | 1700 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1701 | /* "Invalid field in cbd" */ |
1702 | return 1; | |
1703 | ||
1704 | out_of_range: | |
542b1444 | 1705 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1706 | /* "Logical Block Address out of range" */ |
1707 | return 1; | |
1708 | ||
1709 | nothing_to_do: | |
542b1444 | 1710 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1711 | return 1; |
1da177e4 LT |
1712 | } |
1713 | ||
77853bf2 | 1714 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1715 | { |
c31f571d | 1716 | struct ata_port *ap = qc->ap; |
1da177e4 | 1717 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1718 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1719 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1720 | |
1721 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1722 | * user mandated it or if there's an error. Note that if we | |
1723 | * generate because the user forced us to, a check condition | |
1724 | * is generated and the ATA register values are returned | |
1725 | * whether the command completed successfully or not. If there | |
1726 | * was no error, SK, ASC and ASCQ will all be zero. | |
1727 | */ | |
a7dac447 | 1728 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1729 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1730 | ata_gen_passthru_sense(qc); |
b095518e JG |
1731 | } else { |
1732 | if (!need_sense) { | |
1733 | cmd->result = SAM_STAT_GOOD; | |
1734 | } else { | |
1735 | /* TODO: decide which descriptor format to use | |
1736 | * for 48b LBA devices and call that here | |
1737 | * instead of the fixed desc, which is only | |
1738 | * good for smaller LBA (and maybe CHS?) | |
1739 | * devices. | |
1740 | */ | |
750426aa | 1741 | ata_gen_ata_sense(qc); |
b095518e JG |
1742 | } |
1743 | } | |
1da177e4 | 1744 | |
d9aca22c | 1745 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1746 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1747 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1748 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1749 | else if (likely(system_state != SYSTEM_HALT && | |
1750 | system_state != SYSTEM_POWER_OFF)) | |
1751 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1752 | ||
c31f571d | 1753 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1754 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1755 | |
1756 | qc->scsidone(cmd); | |
1757 | ||
77853bf2 | 1758 | ata_qc_free(qc); |
1da177e4 LT |
1759 | } |
1760 | ||
1761 | /** | |
1762 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1763 | * @dev: ATA device to which the command is addressed |
1764 | * @cmd: SCSI command to execute | |
1765 | * @done: SCSI command completion function | |
1766 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1767 | * | |
1768 | * Our ->queuecommand() function has decided that the SCSI | |
1769 | * command issued can be directly translated into an ATA | |
1770 | * command, rather than handled internally. | |
1771 | * | |
1772 | * This function sets up an ata_queued_cmd structure for the | |
1773 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1774 | * | |
ae006510 DG |
1775 | * The xlat_func argument (actor) returns 0 if ready to execute |
1776 | * ATA command, else 1 to finish translation. If 1 is returned | |
1777 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1778 | * to be set reflecting an error condition or clean (early) | |
1779 | * termination. | |
1780 | * | |
1da177e4 | 1781 | * LOCKING: |
cca3974e | 1782 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1783 | * |
1784 | * RETURNS: | |
1785 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1786 | * needs to be deferred. | |
1da177e4 | 1787 | */ |
2115ea94 TH |
1788 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1789 | void (*done)(struct scsi_cmnd *), | |
1790 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1791 | { |
31cc23b3 | 1792 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1793 | struct ata_queued_cmd *qc; |
31cc23b3 | 1794 | int rc; |
1da177e4 LT |
1795 | |
1796 | VPRINTK("ENTER\n"); | |
1797 | ||
3373efd8 | 1798 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1799 | if (!qc) |
ae006510 | 1800 | goto err_mem; |
1da177e4 LT |
1801 | |
1802 | /* data is present; dma-map it */ | |
be7db055 | 1803 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1804 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1805 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1806 | ata_dev_printk(dev, KERN_WARNING, |
1807 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1808 | goto err_did; |
1da177e4 LT |
1809 | } |
1810 | ||
7120165c | 1811 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1812 | |
1813 | qc->dma_dir = cmd->sc_data_direction; | |
1814 | } | |
1815 | ||
1816 | qc->complete_fn = ata_scsi_qc_complete; | |
1817 | ||
ad706991 | 1818 | if (xlat_func(qc)) |
ae006510 | 1819 | goto early_finish; |
1da177e4 | 1820 | |
31cc23b3 TH |
1821 | if (ap->ops->qc_defer) { |
1822 | if ((rc = ap->ops->qc_defer(qc))) | |
1823 | goto defer; | |
1824 | } | |
1825 | ||
1da177e4 | 1826 | /* select device, send command to hardware */ |
8e0e694a | 1827 | ata_qc_issue(qc); |
1da177e4 LT |
1828 | |
1829 | VPRINTK("EXIT\n"); | |
2115ea94 | 1830 | return 0; |
1da177e4 | 1831 | |
ae006510 | 1832 | early_finish: |
2dcb407e | 1833 | ata_qc_free(qc); |
da071b42 | 1834 | qc->scsidone(cmd); |
ae006510 | 1835 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1836 | return 0; |
ae006510 DG |
1837 | |
1838 | err_did: | |
1da177e4 | 1839 | ata_qc_free(qc); |
ae006510 | 1840 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1841 | qc->scsidone(cmd); |
253b92ec | 1842 | err_mem: |
ae006510 | 1843 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1844 | return 0; |
3dc1d881 TH |
1845 | |
1846 | defer: | |
31cc23b3 | 1847 | ata_qc_free(qc); |
3dc1d881 | 1848 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1849 | if (rc == ATA_DEFER_LINK) |
1850 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1851 | else | |
1852 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1853 | } |
1854 | ||
1855 | /** | |
1856 | * ata_scsi_rbuf_get - Map response buffer. | |
ec2a20e6 | 1857 | * @cmd: SCSI command containing buffer to be mapped. |
87340e98 TH |
1858 | * @flags: unsigned long variable to store irq enable status |
1859 | * @copy_in: copy in from user buffer | |
1da177e4 | 1860 | * |
87340e98 | 1861 | * Prepare buffer for simulated SCSI commands. |
1da177e4 LT |
1862 | * |
1863 | * LOCKING: | |
87340e98 | 1864 | * spin_lock_irqsave(ata_scsi_rbuf_lock) on success |
1da177e4 LT |
1865 | * |
1866 | * RETURNS: | |
87340e98 | 1867 | * Pointer to response buffer. |
1da177e4 | 1868 | */ |
87340e98 TH |
1869 | static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, |
1870 | unsigned long *flags) | |
1da177e4 | 1871 | { |
87340e98 | 1872 | spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); |
1da177e4 | 1873 | |
87340e98 TH |
1874 | memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); |
1875 | if (copy_in) | |
1876 | sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1877 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1878 | return ata_scsi_rbuf; | |
1da177e4 LT |
1879 | } |
1880 | ||
1881 | /** | |
1882 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1883 | * @cmd: SCSI command containing buffer to be unmapped. | |
87340e98 TH |
1884 | * @copy_out: copy out result |
1885 | * @flags: @flags passed to ata_scsi_rbuf_get() | |
1da177e4 | 1886 | * |
87340e98 TH |
1887 | * Returns rbuf buffer. The result is copied to @cmd's buffer if |
1888 | * @copy_back is true. | |
1da177e4 LT |
1889 | * |
1890 | * LOCKING: | |
87340e98 | 1891 | * Unlocks ata_scsi_rbuf_lock. |
1da177e4 | 1892 | */ |
87340e98 TH |
1893 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, |
1894 | unsigned long *flags) | |
1da177e4 | 1895 | { |
87340e98 TH |
1896 | if (copy_out) |
1897 | sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1898 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1899 | spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); | |
1da177e4 LT |
1900 | } |
1901 | ||
1902 | /** | |
1903 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1904 | * @args: device IDENTIFY data / SCSI command of interest. | |
1905 | * @actor: Callback hook for desired SCSI command simulator | |
1906 | * | |
1907 | * Takes care of the hard work of simulating a SCSI command... | |
1908 | * Mapping the response buffer, calling the command's handler, | |
1909 | * and handling the handler's return value. This return value | |
1910 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1911 | * completed successfully (0), or not (in which case cmd->result |
1912 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1913 | * |
1914 | * LOCKING: | |
cca3974e | 1915 | * spin_lock_irqsave(host lock) |
1da177e4 | 1916 | */ |
f0761be3 | 1917 | static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, |
87340e98 | 1918 | unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) |
1da177e4 LT |
1919 | { |
1920 | u8 *rbuf; | |
87340e98 | 1921 | unsigned int rc; |
1da177e4 | 1922 | struct scsi_cmnd *cmd = args->cmd; |
b445c568 JG |
1923 | unsigned long flags; |
1924 | ||
87340e98 TH |
1925 | rbuf = ata_scsi_rbuf_get(cmd, false, &flags); |
1926 | rc = actor(args, rbuf); | |
1927 | ata_scsi_rbuf_put(cmd, rc == 0, &flags); | |
b445c568 | 1928 | |
ae006510 | 1929 | if (rc == 0) |
1da177e4 | 1930 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1931 | args->done(cmd); |
1da177e4 LT |
1932 | } |
1933 | ||
1934 | /** | |
1935 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1936 | * @args: device IDENTIFY data / SCSI command of interest. | |
1937 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1938 | * |
1939 | * Returns standard device identification data associated | |
b142eb65 | 1940 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1941 | * |
1942 | * LOCKING: | |
cca3974e | 1943 | * spin_lock_irqsave(host lock) |
1da177e4 | 1944 | */ |
87340e98 | 1945 | static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 1946 | { |
87340e98 TH |
1947 | const u8 versions[] = { |
1948 | 0x60, /* SAM-3 (no version claimed) */ | |
1949 | ||
1950 | 0x03, | |
1951 | 0x20, /* SBC-2 (no version claimed) */ | |
1952 | ||
1953 | 0x02, | |
1954 | 0x60 /* SPC-3 (no version claimed) */ | |
1955 | }; | |
1da177e4 LT |
1956 | u8 hdr[] = { |
1957 | TYPE_DISK, | |
1958 | 0, | |
1959 | 0x5, /* claim SPC-3 version compatibility */ | |
1960 | 2, | |
1961 | 95 - 4 | |
1962 | }; | |
1963 | ||
87340e98 TH |
1964 | VPRINTK("ENTER\n"); |
1965 | ||
1da177e4 LT |
1966 | /* set scsi removeable (RMB) bit per ata bit */ |
1967 | if (ata_id_removeable(args->id)) | |
1968 | hdr[1] |= (1 << 7); | |
1969 | ||
1da177e4 | 1970 | memcpy(rbuf, hdr, sizeof(hdr)); |
87340e98 TH |
1971 | memcpy(&rbuf[8], "ATA ", 8); |
1972 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); | |
1973 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 | 1974 | |
87340e98 TH |
1975 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1976 | memcpy(&rbuf[32], "n/a ", 4); | |
1da177e4 | 1977 | |
87340e98 | 1978 | memcpy(rbuf + 59, versions, sizeof(versions)); |
1da177e4 LT |
1979 | |
1980 | return 0; | |
1981 | } | |
1982 | ||
1983 | /** | |
b142eb65 | 1984 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1985 | * @args: device IDENTIFY data / SCSI command of interest. |
1986 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 1987 | * |
b142eb65 | 1988 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1989 | * |
1990 | * LOCKING: | |
cca3974e | 1991 | * spin_lock_irqsave(host lock) |
1da177e4 | 1992 | */ |
87340e98 | 1993 | static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
1994 | { |
1995 | const u8 pages[] = { | |
1996 | 0x00, /* page 0x00, this page */ | |
1997 | 0x80, /* page 0x80, unit serial no page */ | |
1e9dbc92 MW |
1998 | 0x83, /* page 0x83, device ident page */ |
1999 | 0x89, /* page 0x89, ata info page */ | |
2000 | 0xb1, /* page 0xb1, block device characteristics page */ | |
1da177e4 | 2001 | }; |
1da177e4 | 2002 | |
87340e98 TH |
2003 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
2004 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1da177e4 LT |
2005 | return 0; |
2006 | } | |
2007 | ||
2008 | /** | |
b142eb65 | 2009 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
2010 | * @args: device IDENTIFY data / SCSI command of interest. |
2011 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2012 | * |
2013 | * Returns ATA device serial number. | |
2014 | * | |
2015 | * LOCKING: | |
cca3974e | 2016 | * spin_lock_irqsave(host lock) |
1da177e4 | 2017 | */ |
87340e98 | 2018 | static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2019 | { |
2020 | const u8 hdr[] = { | |
2021 | 0, | |
2022 | 0x80, /* this page code */ | |
2023 | 0, | |
a0cf733b | 2024 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 | 2025 | }; |
1da177e4 | 2026 | |
87340e98 TH |
2027 | memcpy(rbuf, hdr, sizeof(hdr)); |
2028 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
2029 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1da177e4 LT |
2030 | return 0; |
2031 | } | |
2032 | ||
1da177e4 | 2033 | /** |
b142eb65 | 2034 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
2035 | * @args: device IDENTIFY data / SCSI command of interest. |
2036 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2037 | * |
b142eb65 JG |
2038 | * Yields two logical unit device identification designators: |
2039 | * - vendor specific ASCII containing the ATA serial number | |
2040 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
2041 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
2042 | * |
2043 | * LOCKING: | |
cca3974e | 2044 | * spin_lock_irqsave(host lock) |
1da177e4 | 2045 | */ |
87340e98 | 2046 | static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2047 | { |
b142eb65 | 2048 | const int sat_model_serial_desc_len = 68; |
87340e98 | 2049 | int num; |
1da177e4 | 2050 | |
b142eb65 JG |
2051 | rbuf[1] = 0x83; /* this page code */ |
2052 | num = 4; | |
2053 | ||
87340e98 TH |
2054 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2055 | rbuf[num + 0] = 2; | |
2056 | rbuf[num + 3] = ATA_ID_SERNO_LEN; | |
2057 | num += 4; | |
2058 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
2059 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
2060 | num += ATA_ID_SERNO_LEN; | |
2061 | ||
2062 | /* SAT defined lu model and serial numbers descriptor */ | |
2063 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2064 | rbuf[num + 0] = 2; | |
2065 | rbuf[num + 1] = 1; | |
2066 | rbuf[num + 3] = sat_model_serial_desc_len; | |
2067 | num += 4; | |
2068 | memcpy(rbuf + num, "ATA ", 8); | |
2069 | num += 8; | |
2070 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, | |
2071 | ATA_ID_PROD_LEN); | |
2072 | num += ATA_ID_PROD_LEN; | |
2073 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, | |
2074 | ATA_ID_SERNO_LEN); | |
2075 | num += ATA_ID_SERNO_LEN; | |
2076 | ||
b142eb65 | 2077 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ |
1da177e4 LT |
2078 | return 0; |
2079 | } | |
2080 | ||
ad355b46 JG |
2081 | /** |
2082 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
2083 | * @args: device IDENTIFY data / SCSI command of interest. | |
2084 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
ad355b46 JG |
2085 | * |
2086 | * Yields SAT-specified ATA VPD page. | |
2087 | * | |
2088 | * LOCKING: | |
2089 | * spin_lock_irqsave(host lock) | |
2090 | */ | |
87340e98 | 2091 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) |
ad355b46 | 2092 | { |
ad355b46 | 2093 | struct ata_taskfile tf; |
ad355b46 | 2094 | |
ad355b46 JG |
2095 | memset(&tf, 0, sizeof(tf)); |
2096 | ||
87340e98 TH |
2097 | rbuf[1] = 0x89; /* our page code */ |
2098 | rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
2099 | rbuf[3] = (0x238 & 0xff); | |
ad355b46 | 2100 | |
87340e98 TH |
2101 | memcpy(&rbuf[8], "linux ", 8); |
2102 | memcpy(&rbuf[16], "libata ", 16); | |
2103 | memcpy(&rbuf[32], DRV_VERSION, 4); | |
2104 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
ad355b46 JG |
2105 | |
2106 | /* we don't store the ATA device signature, so we fake it */ | |
2107 | ||
2108 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
2109 | tf.lbal = 0x1; | |
2110 | tf.nsect = 0x1; | |
2111 | ||
87340e98 TH |
2112 | ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ |
2113 | rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
ad355b46 | 2114 | |
87340e98 | 2115 | rbuf[56] = ATA_CMD_ID_ATA; |
ad355b46 | 2116 | |
87340e98 | 2117 | memcpy(&rbuf[60], &args->id[0], 512); |
ad355b46 JG |
2118 | return 0; |
2119 | } | |
2120 | ||
1e9dbc92 MW |
2121 | static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) |
2122 | { | |
2123 | rbuf[1] = 0xb1; | |
2124 | rbuf[3] = 0x3c; | |
2125 | if (ata_id_major_version(args->id) > 7) { | |
2126 | rbuf[4] = args->id[217] >> 8; | |
2127 | rbuf[5] = args->id[217]; | |
2128 | rbuf[7] = args->id[168] & 0xf; | |
2129 | } | |
2130 | ||
2131 | return 0; | |
2132 | } | |
2133 | ||
1da177e4 | 2134 | /** |
0cba632b | 2135 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
2136 | * @args: device IDENTIFY data / SCSI command of interest. |
2137 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2138 | * |
2139 | * No operation. Simply returns success to caller, to indicate | |
2140 | * that the caller should successfully complete this SCSI command. | |
2141 | * | |
2142 | * LOCKING: | |
cca3974e | 2143 | * spin_lock_irqsave(host lock) |
1da177e4 | 2144 | */ |
87340e98 | 2145 | static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2146 | { |
2147 | VPRINTK("ENTER\n"); | |
2148 | return 0; | |
2149 | } | |
2150 | ||
1da177e4 LT |
2151 | /** |
2152 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2153 | * @id: device IDENTIFY data | |
87340e98 | 2154 | * @buf: output buffer |
1da177e4 LT |
2155 | * |
2156 | * Generate a caching info page, which conditionally indicates | |
2157 | * write caching to the SCSI layer, depending on device | |
2158 | * capabilities. | |
2159 | * | |
2160 | * LOCKING: | |
2161 | * None. | |
2162 | */ | |
87340e98 | 2163 | static unsigned int ata_msense_caching(u16 *id, u8 *buf) |
1da177e4 | 2164 | { |
87340e98 | 2165 | memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); |
1da177e4 | 2166 | if (ata_id_wcache_enabled(id)) |
87340e98 | 2167 | buf[2] |= (1 << 2); /* write cache enable */ |
1da177e4 | 2168 | if (!ata_id_rahead_enabled(id)) |
87340e98 TH |
2169 | buf[12] |= (1 << 5); /* disable read ahead */ |
2170 | return sizeof(def_cache_mpage); | |
1da177e4 LT |
2171 | } |
2172 | ||
2173 | /** | |
2174 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
87340e98 | 2175 | * @buf: output buffer |
1da177e4 LT |
2176 | * |
2177 | * Generate a generic MODE SENSE control mode page. | |
2178 | * | |
2179 | * LOCKING: | |
2180 | * None. | |
2181 | */ | |
87340e98 | 2182 | static unsigned int ata_msense_ctl_mode(u8 *buf) |
1da177e4 | 2183 | { |
87340e98 | 2184 | memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); |
00ac37f5 | 2185 | return sizeof(def_control_mpage); |
1da177e4 LT |
2186 | } |
2187 | ||
2188 | /** | |
2189 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
ec2a20e6 | 2190 | * @buf: output buffer |
1da177e4 LT |
2191 | * |
2192 | * Generate a generic MODE SENSE r/w error recovery page. | |
2193 | * | |
2194 | * LOCKING: | |
2195 | * None. | |
2196 | */ | |
87340e98 | 2197 | static unsigned int ata_msense_rw_recovery(u8 *buf) |
1da177e4 | 2198 | { |
87340e98 | 2199 | memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); |
00ac37f5 | 2200 | return sizeof(def_rw_recovery_mpage); |
1da177e4 LT |
2201 | } |
2202 | ||
48bdc8ec JA |
2203 | /* |
2204 | * We can turn this into a real blacklist if it's needed, for now just | |
2205 | * blacklist any Maxtor BANC1G10 revision firmware | |
2206 | */ | |
2207 | static int ata_dev_supports_fua(u16 *id) | |
2208 | { | |
a0cf733b | 2209 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2210 | |
c3c013a2 JG |
2211 | if (!libata_fua) |
2212 | return 0; | |
48bdc8ec JA |
2213 | if (!ata_id_has_fua(id)) |
2214 | return 0; | |
2215 | ||
a0cf733b TH |
2216 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2217 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2218 | |
2e02671d | 2219 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2220 | return 1; |
2e02671d | 2221 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2222 | return 1; |
2223 | ||
2224 | return 0; /* blacklisted */ | |
2225 | } | |
2226 | ||
1da177e4 LT |
2227 | /** |
2228 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2229 | * @args: device IDENTIFY data / SCSI command of interest. | |
2230 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2231 | * |
00ac37f5 DG |
2232 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2233 | * access devices (e.g. disks) only. There should be no block | |
2234 | * descriptor for other device types. | |
1da177e4 LT |
2235 | * |
2236 | * LOCKING: | |
cca3974e | 2237 | * spin_lock_irqsave(host lock) |
1da177e4 | 2238 | */ |
87340e98 | 2239 | static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2240 | { |
9a3dccc4 | 2241 | struct ata_device *dev = args->dev; |
87340e98 | 2242 | u8 *scsicmd = args->cmd->cmnd, *p = rbuf; |
00ac37f5 DG |
2243 | const u8 sat_blk_desc[] = { |
2244 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2245 | 0, | |
2246 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2247 | }; | |
2248 | u8 pg, spg; | |
87340e98 | 2249 | unsigned int ebd, page_control, six_byte; |
9a3dccc4 | 2250 | u8 dpofua; |
1da177e4 LT |
2251 | |
2252 | VPRINTK("ENTER\n"); | |
2253 | ||
2254 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2255 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2256 | /* | |
2257 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2258 | */ |
00ac37f5 | 2259 | |
1da177e4 | 2260 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2261 | switch (page_control) { |
2262 | case 0: /* current */ | |
2263 | break; /* supported */ | |
2264 | case 3: /* saved */ | |
2265 | goto saving_not_supp; | |
2266 | case 1: /* changeable */ | |
2267 | case 2: /* defaults */ | |
2268 | default: | |
2269 | goto invalid_fld; | |
2270 | } | |
1da177e4 | 2271 | |
87340e98 TH |
2272 | if (six_byte) |
2273 | p += 4 + (ebd ? 8 : 0); | |
2274 | else | |
2275 | p += 8 + (ebd ? 8 : 0); | |
1da177e4 | 2276 | |
00ac37f5 DG |
2277 | pg = scsicmd[2] & 0x3f; |
2278 | spg = scsicmd[3]; | |
2279 | /* | |
2280 | * No mode subpages supported (yet) but asking for _all_ | |
2281 | * subpages may be valid | |
2282 | */ | |
2283 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2284 | goto invalid_fld; | |
2285 | ||
2286 | switch(pg) { | |
2287 | case RW_RECOVERY_MPAGE: | |
87340e98 | 2288 | p += ata_msense_rw_recovery(p); |
1da177e4 LT |
2289 | break; |
2290 | ||
00ac37f5 | 2291 | case CACHE_MPAGE: |
87340e98 | 2292 | p += ata_msense_caching(args->id, p); |
1da177e4 LT |
2293 | break; |
2294 | ||
87340e98 TH |
2295 | case CONTROL_MPAGE: |
2296 | p += ata_msense_ctl_mode(p); | |
1da177e4 | 2297 | break; |
1da177e4 | 2298 | |
00ac37f5 | 2299 | case ALL_MPAGES: |
87340e98 TH |
2300 | p += ata_msense_rw_recovery(p); |
2301 | p += ata_msense_caching(args->id, p); | |
2302 | p += ata_msense_ctl_mode(p); | |
1da177e4 LT |
2303 | break; |
2304 | ||
2305 | default: /* invalid page code */ | |
ae006510 | 2306 | goto invalid_fld; |
1da177e4 LT |
2307 | } |
2308 | ||
9a3dccc4 | 2309 | dpofua = 0; |
f79d409f | 2310 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2311 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2312 | dpofua = 1 << 4; | |
2313 | ||
1da177e4 | 2314 | if (six_byte) { |
87340e98 TH |
2315 | rbuf[0] = p - rbuf - 1; |
2316 | rbuf[2] |= dpofua; | |
00ac37f5 | 2317 | if (ebd) { |
87340e98 TH |
2318 | rbuf[3] = sizeof(sat_blk_desc); |
2319 | memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2320 | } |
1da177e4 | 2321 | } else { |
87340e98 TH |
2322 | unsigned int output_len = p - rbuf - 2; |
2323 | ||
1da177e4 | 2324 | rbuf[0] = output_len >> 8; |
87340e98 TH |
2325 | rbuf[1] = output_len; |
2326 | rbuf[3] |= dpofua; | |
00ac37f5 | 2327 | if (ebd) { |
87340e98 TH |
2328 | rbuf[7] = sizeof(sat_blk_desc); |
2329 | memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2330 | } |
1da177e4 | 2331 | } |
1da177e4 | 2332 | return 0; |
ae006510 DG |
2333 | |
2334 | invalid_fld: | |
2335 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2336 | /* "Invalid field in cbd" */ | |
2337 | return 1; | |
2338 | ||
2339 | saving_not_supp: | |
2340 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2341 | /* "Saving parameters not supported" */ | |
2342 | return 1; | |
1da177e4 LT |
2343 | } |
2344 | ||
2345 | /** | |
2346 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2347 | * @args: device IDENTIFY data / SCSI command of interest. | |
2348 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2349 | * |
2350 | * Simulate READ CAPACITY commands. | |
2351 | * | |
2352 | * LOCKING: | |
6a36261e | 2353 | * None. |
1da177e4 | 2354 | */ |
87340e98 | 2355 | static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2356 | { |
6a36261e | 2357 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2358 | |
2359 | VPRINTK("ENTER\n"); | |
2360 | ||
1da177e4 | 2361 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2362 | if (last_lba >= 0xffffffffULL) |
2363 | last_lba = 0xffffffff; | |
0c144d0d | 2364 | |
1da177e4 | 2365 | /* sector count, 32-bit */ |
87340e98 TH |
2366 | rbuf[0] = last_lba >> (8 * 3); |
2367 | rbuf[1] = last_lba >> (8 * 2); | |
2368 | rbuf[2] = last_lba >> (8 * 1); | |
2369 | rbuf[3] = last_lba; | |
1da177e4 LT |
2370 | |
2371 | /* sector size */ | |
87340e98 TH |
2372 | rbuf[6] = ATA_SECT_SIZE >> 8; |
2373 | rbuf[7] = ATA_SECT_SIZE & 0xff; | |
1da177e4 LT |
2374 | } else { |
2375 | /* sector count, 64-bit */ | |
87340e98 TH |
2376 | rbuf[0] = last_lba >> (8 * 7); |
2377 | rbuf[1] = last_lba >> (8 * 6); | |
2378 | rbuf[2] = last_lba >> (8 * 5); | |
2379 | rbuf[3] = last_lba >> (8 * 4); | |
2380 | rbuf[4] = last_lba >> (8 * 3); | |
2381 | rbuf[5] = last_lba >> (8 * 2); | |
2382 | rbuf[6] = last_lba >> (8 * 1); | |
2383 | rbuf[7] = last_lba; | |
1da177e4 LT |
2384 | |
2385 | /* sector size */ | |
87340e98 TH |
2386 | rbuf[10] = ATA_SECT_SIZE >> 8; |
2387 | rbuf[11] = ATA_SECT_SIZE & 0xff; | |
1da177e4 LT |
2388 | } |
2389 | ||
2390 | return 0; | |
2391 | } | |
2392 | ||
2393 | /** | |
2394 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2395 | * @args: device IDENTIFY data / SCSI command of interest. | |
2396 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2397 | * |
2398 | * Simulate REPORT LUNS command. | |
2399 | * | |
2400 | * LOCKING: | |
cca3974e | 2401 | * spin_lock_irqsave(host lock) |
1da177e4 | 2402 | */ |
87340e98 | 2403 | static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2404 | { |
2405 | VPRINTK("ENTER\n"); | |
2406 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2407 | ||
2408 | return 0; | |
2409 | } | |
2410 | ||
77853bf2 | 2411 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2412 | { |
74e6c8c3 | 2413 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2414 | /* FIXME: not quite right; we don't want the |
2415 | * translation of taskfile registers into | |
2416 | * a sense descriptors, since that's only | |
2417 | * correct for ATA, not ATAPI | |
2418 | */ | |
750426aa | 2419 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2420 | } |
a939c963 | 2421 | |
c6e6e666 | 2422 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2423 | ata_qc_free(qc); |
c6e6e666 | 2424 | } |
a939c963 | 2425 | |
c6e6e666 JG |
2426 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2427 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2428 | { | |
2429 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2430 | } | |
2431 | ||
2432 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2433 | { | |
2434 | struct ata_port *ap = qc->ap; | |
2435 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2436 | ||
2437 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2438 | |
2439 | /* FIXME: is this needed? */ | |
7ccd720d | 2440 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2441 | |
127102ae | 2442 | #ifdef CONFIG_ATA_SFF |
855d854a JB |
2443 | if (ap->ops->sff_tf_read) |
2444 | ap->ops->sff_tf_read(ap, &qc->tf); | |
127102ae | 2445 | #endif |
c6e6e666 JG |
2446 | |
2447 | /* fill these in, for the case where they are -not- overwritten */ | |
2448 | cmd->sense_buffer[0] = 0x70; | |
2449 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2450 | ||
2451 | ata_qc_reinit(qc); | |
2452 | ||
93f8fecb | 2453 | /* setup sg table and init transfer direction */ |
cadb7345 | 2454 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2455 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2456 | qc->dma_dir = DMA_FROM_DEVICE; |
2457 | ||
6e7846e9 | 2458 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2459 | qc->cdb[0] = REQUEST_SENSE; |
2460 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2461 | ||
2462 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2463 | qc->tf.command = ATA_CMD_PACKET; | |
2464 | ||
c6e6e666 | 2465 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2466 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2467 | qc->tf.feature |= ATAPI_PKT_DMA; |
2468 | } else { | |
0dc36888 | 2469 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2470 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2471 | qc->tf.lbah = 0; | |
c6e6e666 | 2472 | } |
a939c963 JG |
2473 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2474 | ||
c6e6e666 | 2475 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2476 | |
8e0e694a | 2477 | ata_qc_issue(qc); |
a939c963 JG |
2478 | |
2479 | DPRINTK("EXIT\n"); | |
2480 | } | |
2481 | ||
77853bf2 | 2482 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2483 | { |
2484 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2485 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2486 | |
a7dac447 | 2487 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2488 | |
246619da TH |
2489 | /* handle completion from new EH */ |
2490 | if (unlikely(qc->ap->ops->error_handler && | |
2491 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2492 | ||
2493 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2494 | /* FIXME: not quite right; we don't want the | |
2495 | * translation of taskfile registers into a | |
2496 | * sense descriptors, since that's only | |
2497 | * correct for ATA, not ATAPI | |
2498 | */ | |
750426aa | 2499 | ata_gen_passthru_sense(qc); |
246619da TH |
2500 | } |
2501 | ||
22aac089 TH |
2502 | /* SCSI EH automatically locks door if sdev->locked is |
2503 | * set. Sometimes door lock request continues to | |
2504 | * fail, for example, when no media is present. This | |
2505 | * creates a loop - SCSI EH issues door lock which | |
2506 | * fails and gets invoked again to acquire sense data | |
2507 | * for the failed command. | |
2508 | * | |
2509 | * If door lock fails, always clear sdev->locked to | |
2510 | * avoid this infinite loop. | |
2511 | */ | |
2512 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2513 | qc->dev->sdev->locked = 0; | |
2514 | ||
246619da TH |
2515 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2516 | qc->scsidone(cmd); | |
2517 | ata_qc_free(qc); | |
2518 | return; | |
2519 | } | |
2520 | ||
2521 | /* successful completion or old EH failure path */ | |
a7dac447 | 2522 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2523 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2524 | atapi_request_sense(qc); |
77853bf2 | 2525 | return; |
74e6c8c3 | 2526 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2527 | /* FIXME: not quite right; we don't want the |
2528 | * translation of taskfile registers into | |
2529 | * a sense descriptors, since that's only | |
2530 | * correct for ATA, not ATAPI | |
2531 | */ | |
750426aa | 2532 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2533 | } else { |
1da177e4 LT |
2534 | u8 *scsicmd = cmd->cmnd; |
2535 | ||
fd71da46 | 2536 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
b445c568 | 2537 | unsigned long flags; |
87340e98 | 2538 | u8 *buf; |
b445c568 | 2539 | |
87340e98 | 2540 | buf = ata_scsi_rbuf_get(cmd, true, &flags); |
a15dbeb4 JG |
2541 | |
2542 | /* ATAPI devices typically report zero for their SCSI version, | |
2543 | * and sometimes deviate from the spec WRT response data | |
2544 | * format. If SCSI version is reported as zero like normal, | |
2545 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2546 | * to indicate to the Linux scsi midlayer this is a modern | |
2547 | * device. 2) Ensure response data format / ATAPI information | |
2548 | * are always correct. | |
a15dbeb4 JG |
2549 | */ |
2550 | if (buf[2] == 0) { | |
2551 | buf[2] = 0x5; | |
2552 | buf[3] = 0x32; | |
2553 | } | |
2554 | ||
87340e98 | 2555 | ata_scsi_rbuf_put(cmd, true, &flags); |
1da177e4 | 2556 | } |
a15dbeb4 | 2557 | |
1da177e4 LT |
2558 | cmd->result = SAM_STAT_GOOD; |
2559 | } | |
2560 | ||
2561 | qc->scsidone(cmd); | |
77853bf2 | 2562 | ata_qc_free(qc); |
1da177e4 LT |
2563 | } |
2564 | /** | |
2565 | * atapi_xlat - Initialize PACKET taskfile | |
2566 | * @qc: command structure to be initialized | |
1da177e4 LT |
2567 | * |
2568 | * LOCKING: | |
cca3974e | 2569 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2570 | * |
2571 | * RETURNS: | |
2572 | * Zero on success, non-zero on failure. | |
2573 | */ | |
ad706991 | 2574 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2575 | { |
542b1444 | 2576 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 2577 | struct ata_device *dev = qc->dev; |
542b1444 | 2578 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
5895ef9a | 2579 | int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); |
2db78dd3 | 2580 | unsigned int nbytes; |
1da177e4 | 2581 | |
2e5704f6 TH |
2582 | memset(qc->cdb, 0, dev->cdb_len); |
2583 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2584 | |
2585 | qc->complete_fn = atapi_qc_complete; | |
2586 | ||
2587 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2588 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2589 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2590 | DPRINTK("direction: write\n"); | |
2591 | } | |
2592 | ||
2593 | qc->tf.command = ATA_CMD_PACKET; | |
aacda375 | 2594 | ata_qc_set_pc_nbytes(qc); |
e00f1ff3 TH |
2595 | |
2596 | /* check whether ATAPI DMA is safe */ | |
5895ef9a | 2597 | if (!nodata && !using_pio && atapi_check_dma(qc)) |
e00f1ff3 | 2598 | using_pio = 1; |
1da177e4 | 2599 | |
e190222d TH |
2600 | /* Some controller variants snoop this value for Packet |
2601 | * transfers to do state machine and FIFO management. Thus we | |
2602 | * want to set it properly, and for DMA where it is | |
2603 | * effectively meaningless. | |
2604 | */ | |
aacda375 | 2605 | nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); |
2db78dd3 | 2606 | |
e190222d TH |
2607 | /* Most ATAPI devices which honor transfer chunk size don't |
2608 | * behave according to the spec when odd chunk size which | |
2609 | * matches the transfer length is specified. If the number of | |
2610 | * bytes to transfer is 2n+1. According to the spec, what | |
2611 | * should happen is to indicate that 2n+1 is going to be | |
2612 | * transferred and transfer 2n+2 bytes where the last byte is | |
2613 | * padding. | |
2614 | * | |
2615 | * In practice, this doesn't happen. ATAPI devices first | |
2616 | * indicate and transfer 2n bytes and then indicate and | |
2617 | * transfer 2 bytes where the last byte is padding. | |
2618 | * | |
2619 | * This inconsistency confuses several controllers which | |
2620 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2621 | * These controllers use actual number of transferred bytes to | |
2622 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2623 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2624 | * FISes are aligned to 4 bytes. This causes data corruption | |
2625 | * and buffer overrun. | |
2626 | * | |
2627 | * Always setting nbytes to even number solves this problem | |
2628 | * because then ATAPI devices don't have to split data at 2n | |
2629 | * boundaries. | |
2630 | */ | |
2631 | if (nbytes & 0x1) | |
2632 | nbytes++; | |
2633 | ||
2db78dd3 AC |
2634 | qc->tf.lbam = (nbytes & 0xFF); |
2635 | qc->tf.lbah = (nbytes >> 8); | |
2636 | ||
5895ef9a TH |
2637 | if (nodata) |
2638 | qc->tf.protocol = ATAPI_PROT_NODATA; | |
2639 | else if (using_pio) | |
2640 | qc->tf.protocol = ATAPI_PROT_PIO; | |
2641 | else { | |
e00f1ff3 | 2642 | /* DMA data xfer */ |
0dc36888 | 2643 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2644 | qc->tf.feature |= ATAPI_PKT_DMA; |
2645 | ||
91163006 TH |
2646 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2647 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2648 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2649 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2650 | } |
2651 | ||
2db78dd3 AC |
2652 | |
2653 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2654 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2655 | return 0; |
2656 | } | |
2657 | ||
2dcb407e | 2658 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2659 | { |
071f44b1 | 2660 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2661 | if (likely(devno < ata_link_max_devices(&ap->link))) |
2662 | return &ap->link.device[devno]; | |
2663 | } else { | |
2664 | if (likely(devno < ap->nr_pmp_links)) | |
2665 | return &ap->pmp_link[devno].device[0]; | |
2666 | } | |
2667 | ||
ab5b3a5b TH |
2668 | return NULL; |
2669 | } | |
2670 | ||
2dcb407e JG |
2671 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2672 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2673 | { |
41bda9c9 TH |
2674 | int devno; |
2675 | ||
ab5b3a5b | 2676 | /* skip commands not addressed to targets we simulate */ |
071f44b1 | 2677 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2678 | if (unlikely(scsidev->channel || scsidev->lun)) |
2679 | return NULL; | |
2680 | devno = scsidev->id; | |
2681 | } else { | |
2682 | if (unlikely(scsidev->id || scsidev->lun)) | |
2683 | return NULL; | |
2684 | devno = scsidev->channel; | |
2685 | } | |
ab5b3a5b | 2686 | |
41bda9c9 | 2687 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2688 | } |
2689 | ||
1da177e4 LT |
2690 | /** |
2691 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2692 | * @ap: ATA port to which the device is attached | |
2693 | * @scsidev: SCSI device from which we derive the ATA device | |
2694 | * | |
2695 | * Given various information provided in struct scsi_cmnd, | |
2696 | * map that onto an ATA bus, and using that mapping | |
2697 | * determine which ata_device is associated with the | |
2698 | * SCSI command to be sent. | |
2699 | * | |
2700 | * LOCKING: | |
cca3974e | 2701 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2702 | * |
2703 | * RETURNS: | |
2704 | * Associated ATA device, or %NULL if not found. | |
2705 | */ | |
1da177e4 | 2706 | static struct ata_device * |
057ace5e | 2707 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2708 | { |
ab5b3a5b | 2709 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2710 | |
2486fa56 | 2711 | if (unlikely(!dev || !ata_dev_enabled(dev))) |
1da177e4 LT |
2712 | return NULL; |
2713 | ||
1da177e4 LT |
2714 | return dev; |
2715 | } | |
2716 | ||
b095518e JG |
2717 | /* |
2718 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2719 | * @byte1: Byte 1 from pass-thru CDB. | |
2720 | * | |
2721 | * RETURNS: | |
2722 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2723 | */ | |
2724 | static u8 | |
2725 | ata_scsi_map_proto(u8 byte1) | |
2726 | { | |
2727 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2728 | case 3: /* Non-data */ |
2729 | return ATA_PROT_NODATA; | |
2730 | ||
2731 | case 6: /* DMA */ | |
2732 | case 10: /* UDMA Data-in */ | |
2733 | case 11: /* UDMA Data-Out */ | |
2734 | return ATA_PROT_DMA; | |
2735 | ||
2736 | case 4: /* PIO Data-in */ | |
2737 | case 5: /* PIO Data-out */ | |
2738 | return ATA_PROT_PIO; | |
2739 | ||
2740 | case 0: /* Hard Reset */ | |
2741 | case 1: /* SRST */ | |
2742 | case 8: /* Device Diagnostic */ | |
2743 | case 9: /* Device Reset */ | |
2744 | case 7: /* DMA Queued */ | |
2745 | case 12: /* FPDMA */ | |
2746 | case 15: /* Return Response Info */ | |
2747 | default: /* Reserved */ | |
2748 | break; | |
b095518e JG |
2749 | } |
2750 | ||
2751 | return ATA_PROT_UNKNOWN; | |
2752 | } | |
2753 | ||
2754 | /** | |
2755 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2756 | * @qc: command structure to be initialized | |
b095518e JG |
2757 | * |
2758 | * Handles either 12 or 16-byte versions of the CDB. | |
2759 | * | |
2760 | * RETURNS: | |
2761 | * Zero on success, non-zero on failure. | |
2762 | */ | |
ad706991 | 2763 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2764 | { |
2765 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2766 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2767 | struct ata_device *dev = qc->dev; |
ad706991 | 2768 | const u8 *cdb = scmd->cmnd; |
b095518e | 2769 | |
542b1444 | 2770 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2771 | goto invalid_fld; |
8190bdb9 | 2772 | |
ae8d4ee7 AC |
2773 | /* |
2774 | * Filter TPM commands by default. These provide an | |
2775 | * essentially uncontrolled encrypted "back door" between | |
2776 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2777 | * have a real reason for wanting to use them. This ensures | |
2778 | * that installed software cannot easily mess stuff up without | |
2779 | * user intent. DVR type users will probably ship with this enabled | |
2780 | * for movie content management. | |
2781 | * | |
2782 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock | |
2783 | * for this and should do in future but that it is not sufficient as | |
2784 | * DCS is an optional feature set. Thus we also do the software filter | |
2785 | * so that we comply with the TC consortium stated goal that the user | |
2786 | * can turn off TC features of their system. | |
2787 | */ | |
2788 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) | |
2789 | goto invalid_fld; | |
2790 | ||
f79d409f AC |
2791 | /* We may not issue DMA commands if no DMA mode is set */ |
2792 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2793 | goto invalid_fld; | |
b095518e JG |
2794 | |
2795 | /* | |
2796 | * 12 and 16 byte CDBs use different offsets to | |
2797 | * provide the various register values. | |
2798 | */ | |
542b1444 | 2799 | if (cdb[0] == ATA_16) { |
b095518e JG |
2800 | /* |
2801 | * 16-byte CDB - may contain extended commands. | |
2802 | * | |
2803 | * If that is the case, copy the upper byte register values. | |
2804 | */ | |
542b1444 TH |
2805 | if (cdb[1] & 0x01) { |
2806 | tf->hob_feature = cdb[3]; | |
2807 | tf->hob_nsect = cdb[5]; | |
2808 | tf->hob_lbal = cdb[7]; | |
2809 | tf->hob_lbam = cdb[9]; | |
2810 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2811 | tf->flags |= ATA_TFLAG_LBA48; |
2812 | } else | |
2813 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2814 | ||
2815 | /* | |
2816 | * Always copy low byte, device and command registers. | |
2817 | */ | |
542b1444 TH |
2818 | tf->feature = cdb[4]; |
2819 | tf->nsect = cdb[6]; | |
2820 | tf->lbal = cdb[8]; | |
2821 | tf->lbam = cdb[10]; | |
2822 | tf->lbah = cdb[12]; | |
2823 | tf->device = cdb[13]; | |
2824 | tf->command = cdb[14]; | |
b095518e JG |
2825 | } else { |
2826 | /* | |
2827 | * 12-byte CDB - incapable of extended commands. | |
2828 | */ | |
2829 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2830 | ||
542b1444 TH |
2831 | tf->feature = cdb[3]; |
2832 | tf->nsect = cdb[4]; | |
2833 | tf->lbal = cdb[5]; | |
2834 | tf->lbam = cdb[6]; | |
2835 | tf->lbah = cdb[7]; | |
2836 | tf->device = cdb[8]; | |
2837 | tf->command = cdb[9]; | |
b095518e | 2838 | } |
fa4453c4 AL |
2839 | |
2840 | /* enforce correct master/slave bit */ | |
2841 | tf->device = dev->devno ? | |
2842 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2843 | |
1dce589c AL |
2844 | /* sanity check for pio multi commands */ |
2845 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2846 | goto invalid_fld; | |
2847 | ||
2848 | if (is_multi_taskfile(tf)) { | |
2849 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2850 | ||
2851 | /* compare the passed through multi_count | |
2852 | * with the cached multi_count of libata | |
2853 | */ | |
2854 | if (multi_count != dev->multi_count) | |
2855 | ata_dev_printk(dev, KERN_WARNING, | |
2856 | "invalid multi_count %u ignored\n", | |
2857 | multi_count); | |
d26fc955 | 2858 | } |
1dce589c | 2859 | |
5a5dbd18 ML |
2860 | /* READ/WRITE LONG use a non-standard sect_size */ |
2861 | qc->sect_size = ATA_SECT_SIZE; | |
2862 | switch (tf->command) { | |
2863 | case ATA_CMD_READ_LONG: | |
2864 | case ATA_CMD_READ_LONG_ONCE: | |
2865 | case ATA_CMD_WRITE_LONG: | |
2866 | case ATA_CMD_WRITE_LONG_ONCE: | |
2867 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2868 | goto invalid_fld; | |
7120165c | 2869 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2870 | } |
2871 | ||
b095518e JG |
2872 | /* |
2873 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2874 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2875 | * by an update to hardware-specific registers for each | |
2876 | * controller (i.e. the reason for ->set_piomode(), | |
2877 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2878 | */ | |
2879 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2880 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2881 | goto invalid_fld; |
b095518e JG |
2882 | |
2883 | /* | |
2884 | * Set flags so that all registers will be written, | |
2885 | * and pass on write indication (used for PIO/DMA | |
2886 | * setup.) | |
2887 | */ | |
2888 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2889 | ||
542b1444 | 2890 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2891 | tf->flags |= ATA_TFLAG_WRITE; |
2892 | ||
2893 | /* | |
2894 | * Set transfer length. | |
2895 | * | |
2896 | * TODO: find out if we need to do more here to | |
2897 | * cover scatter/gather case. | |
2898 | */ | |
aacda375 | 2899 | ata_qc_set_pc_nbytes(qc); |
b095518e | 2900 | |
e027bd36 TH |
2901 | /* request result TF and be quiet about device error */ |
2902 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
e61e0672 | 2903 | |
b095518e | 2904 | return 0; |
9a405257 TH |
2905 | |
2906 | invalid_fld: | |
542b1444 | 2907 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2908 | /* "Invalid field in cdb" */ |
2909 | return 1; | |
b095518e JG |
2910 | } |
2911 | ||
1da177e4 LT |
2912 | /** |
2913 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2914 | * @dev: ATA device | |
2915 | * @cmd: SCSI command opcode to consider | |
2916 | * | |
2917 | * Look up the SCSI command given, and determine whether the | |
2918 | * SCSI command is to be translated or simulated. | |
2919 | * | |
2920 | * RETURNS: | |
2921 | * Pointer to translation function if possible, %NULL if not. | |
2922 | */ | |
2923 | ||
2924 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2925 | { | |
2926 | switch (cmd) { | |
2927 | case READ_6: | |
2928 | case READ_10: | |
2929 | case READ_16: | |
2930 | ||
2931 | case WRITE_6: | |
2932 | case WRITE_10: | |
2933 | case WRITE_16: | |
2934 | return ata_scsi_rw_xlat; | |
2935 | ||
2936 | case SYNCHRONIZE_CACHE: | |
2937 | if (ata_try_flush_cache(dev)) | |
2938 | return ata_scsi_flush_xlat; | |
2939 | break; | |
2940 | ||
2941 | case VERIFY: | |
2942 | case VERIFY_16: | |
2943 | return ata_scsi_verify_xlat; | |
b095518e JG |
2944 | |
2945 | case ATA_12: | |
2946 | case ATA_16: | |
2947 | return ata_scsi_pass_thru; | |
da61396d | 2948 | |
972dcafb DG |
2949 | case START_STOP: |
2950 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2951 | } |
2952 | ||
2953 | return NULL; | |
2954 | } | |
2955 | ||
2956 | /** | |
2957 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2958 | * @ap: ATA port to which the command was being sent | |
2959 | * @cmd: SCSI command to dump | |
2960 | * | |
2961 | * Prints the contents of a SCSI command via printk(). | |
2962 | */ | |
2963 | ||
2964 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2965 | struct scsi_cmnd *cmd) | |
2966 | { | |
2967 | #ifdef ATA_DEBUG | |
2968 | struct scsi_device *scsidev = cmd->device; | |
2969 | u8 *scsicmd = cmd->cmnd; | |
2970 | ||
2971 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 2972 | ap->print_id, |
1da177e4 LT |
2973 | scsidev->channel, scsidev->id, scsidev->lun, |
2974 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2975 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2976 | scsicmd[8]); | |
2977 | #endif | |
2978 | } | |
2979 | ||
542b1444 | 2980 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2981 | void (*done)(struct scsi_cmnd *), |
2982 | struct ata_device *dev) | |
eb3f0f9c | 2983 | { |
baf4fdfa ML |
2984 | u8 scsi_op = scmd->cmnd[0]; |
2985 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
2986 | int rc = 0; |
2987 | ||
eb3f0f9c | 2988 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
2989 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
2990 | goto bad_cdb_len; | |
eb3f0f9c | 2991 | |
baf4fdfa ML |
2992 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
2993 | } else { | |
2994 | if (unlikely(!scmd->cmd_len)) | |
2995 | goto bad_cdb_len; | |
2996 | ||
2997 | xlat_func = NULL; | |
2998 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
2999 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
3000 | int len = COMMAND_SIZE(scsi_op); |
3001 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
3002 | goto bad_cdb_len; |
3003 | ||
3004 | xlat_func = atapi_xlat; | |
3005 | } else { | |
3006 | /* ATA_16 passthru, treat as an ATA command */ | |
3007 | if (unlikely(scmd->cmd_len > 16)) | |
3008 | goto bad_cdb_len; | |
3009 | ||
3010 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
3011 | } | |
3012 | } | |
3013 | ||
3014 | if (xlat_func) | |
3015 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
3016 | else | |
3017 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
3018 | |
3019 | return rc; | |
baf4fdfa ML |
3020 | |
3021 | bad_cdb_len: | |
3022 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
3023 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
3024 | scmd->result = DID_ERROR << 16; | |
3025 | done(scmd); | |
3026 | return 0; | |
eb3f0f9c BK |
3027 | } |
3028 | ||
1da177e4 LT |
3029 | /** |
3030 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
3031 | * @cmd: SCSI command to be sent | |
3032 | * @done: Completion function, called when command is complete | |
3033 | * | |
3034 | * In some cases, this function translates SCSI commands into | |
3035 | * ATA taskfiles, and queues the taskfiles to be sent to | |
3036 | * hardware. In other cases, this function simulates a | |
3037 | * SCSI device by evaluating and responding to certain | |
3038 | * SCSI commands. This creates the overall effect of | |
3039 | * ATA and ATAPI devices appearing as SCSI devices. | |
3040 | * | |
3041 | * LOCKING: | |
cca3974e | 3042 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
3043 | * |
3044 | * RETURNS: | |
2115ea94 TH |
3045 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3046 | * 0 otherwise. | |
1da177e4 | 3047 | */ |
1da177e4 LT |
3048 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
3049 | { | |
3050 | struct ata_port *ap; | |
3051 | struct ata_device *dev; | |
3052 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 3053 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 3054 | int rc = 0; |
1da177e4 | 3055 | |
35bb94b1 | 3056 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
3057 | |
3058 | spin_unlock(shost->host_lock); | |
ba6a1308 | 3059 | spin_lock(ap->lock); |
1da177e4 LT |
3060 | |
3061 | ata_scsi_dump_cdb(ap, cmd); | |
3062 | ||
3063 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 3064 | if (likely(dev)) |
2115ea94 | 3065 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 3066 | else { |
1da177e4 LT |
3067 | cmd->result = (DID_BAD_TARGET << 16); |
3068 | done(cmd); | |
1da177e4 LT |
3069 | } |
3070 | ||
ba6a1308 | 3071 | spin_unlock(ap->lock); |
005a5a06 | 3072 | spin_lock(shost->host_lock); |
2115ea94 | 3073 | return rc; |
1da177e4 LT |
3074 | } |
3075 | ||
3076 | /** | |
3077 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 3078 | * @dev: the target device |
1da177e4 LT |
3079 | * @cmd: SCSI command being sent to device. |
3080 | * @done: SCSI command completion function. | |
3081 | * | |
3082 | * Interprets and directly executes a select list of SCSI commands | |
3083 | * that can be handled internally. | |
3084 | * | |
3085 | * LOCKING: | |
cca3974e | 3086 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3087 | */ |
3088 | ||
3373efd8 | 3089 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
3090 | void (*done)(struct scsi_cmnd *)) |
3091 | { | |
3092 | struct ata_scsi_args args; | |
057ace5e | 3093 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 3094 | u8 tmp8; |
1da177e4 | 3095 | |
9a3dccc4 TH |
3096 | args.dev = dev; |
3097 | args.id = dev->id; | |
1da177e4 LT |
3098 | args.cmd = cmd; |
3099 | args.done = done; | |
3100 | ||
3101 | switch(scsicmd[0]) { | |
2dcb407e JG |
3102 | /* TODO: worth improving? */ |
3103 | case FORMAT_UNIT: | |
3104 | ata_scsi_invalid_field(cmd, done); | |
3105 | break; | |
3106 | ||
3107 | case INQUIRY: | |
3108 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 3109 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
3110 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3111 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3112 | else switch (scsicmd[2]) { | |
3113 | case 0x00: | |
3114 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3115 | break; |
2dcb407e JG |
3116 | case 0x80: |
3117 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3118 | break; |
2dcb407e JG |
3119 | case 0x83: |
3120 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3121 | break; |
2dcb407e JG |
3122 | case 0x89: |
3123 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3124 | break; | |
1e9dbc92 MW |
3125 | case 0xb1: |
3126 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); | |
3127 | break; | |
2dcb407e | 3128 | default: |
ae006510 | 3129 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 3130 | break; |
2dcb407e JG |
3131 | } |
3132 | break; | |
3133 | ||
3134 | case MODE_SENSE: | |
3135 | case MODE_SENSE_10: | |
3136 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3137 | break; | |
3138 | ||
3139 | case MODE_SELECT: /* unconditionally return */ | |
3140 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3141 | ata_scsi_invalid_field(cmd, done); | |
3142 | break; | |
1da177e4 | 3143 | |
2dcb407e JG |
3144 | case READ_CAPACITY: |
3145 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3146 | break; | |
3147 | ||
3148 | case SERVICE_ACTION_IN: | |
3149 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3150 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3151 | else |
3152 | ata_scsi_invalid_field(cmd, done); | |
3153 | break; | |
1da177e4 | 3154 | |
2dcb407e JG |
3155 | case REPORT_LUNS: |
3156 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3157 | break; | |
1da177e4 | 3158 | |
2dcb407e JG |
3159 | case REQUEST_SENSE: |
3160 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3161 | cmd->result = (DRIVER_SENSE << 24); | |
3162 | done(cmd); | |
3163 | break; | |
1da177e4 | 3164 | |
2dcb407e JG |
3165 | /* if we reach this, then writeback caching is disabled, |
3166 | * turning this into a no-op. | |
3167 | */ | |
3168 | case SYNCHRONIZE_CACHE: | |
3169 | /* fall through */ | |
3170 | ||
3171 | /* no-op's, complete with success */ | |
3172 | case REZERO_UNIT: | |
3173 | case SEEK_6: | |
3174 | case SEEK_10: | |
3175 | case TEST_UNIT_READY: | |
3176 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3177 | break; | |
45394145 | 3178 | |
2dcb407e JG |
3179 | case SEND_DIAGNOSTIC: |
3180 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3181 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3182 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3183 | else |
3184 | ata_scsi_invalid_field(cmd, done); | |
3185 | break; | |
1da177e4 | 3186 | |
2dcb407e JG |
3187 | /* all other commands */ |
3188 | default: | |
3189 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3190 | /* "Invalid command operation code" */ | |
3191 | done(cmd); | |
3192 | break; | |
1da177e4 LT |
3193 | } |
3194 | } | |
3195 | ||
f3187195 TH |
3196 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3197 | { | |
3198 | int i, rc; | |
3199 | ||
3200 | for (i = 0; i < host->n_ports; i++) { | |
3201 | struct ata_port *ap = host->ports[i]; | |
3202 | struct Scsi_Host *shost; | |
3203 | ||
3204 | rc = -ENOMEM; | |
3205 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3206 | if (!shost) | |
3207 | goto err_alloc; | |
3208 | ||
3209 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3210 | ap->scsi_host = shost; | |
3211 | ||
3212 | shost->transportt = &ata_scsi_transport_template; | |
3213 | shost->unique_id = ap->print_id; | |
3214 | shost->max_id = 16; | |
3215 | shost->max_lun = 1; | |
3216 | shost->max_channel = 1; | |
3217 | shost->max_cmd_len = 16; | |
3218 | ||
31cc23b3 TH |
3219 | /* Schedule policy is determined by ->qc_defer() |
3220 | * callback and it needs to see every deferred qc. | |
3221 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3222 | * automatically deferring requests. | |
3223 | */ | |
3224 | shost->max_host_blocked = 1; | |
3225 | ||
f3187195 TH |
3226 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3227 | if (rc) | |
3228 | goto err_add; | |
3229 | } | |
3230 | ||
3231 | return 0; | |
3232 | ||
3233 | err_add: | |
3234 | scsi_host_put(host->ports[i]->scsi_host); | |
3235 | err_alloc: | |
3236 | while (--i >= 0) { | |
3237 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3238 | ||
3239 | scsi_remove_host(shost); | |
3240 | scsi_host_put(shost); | |
3241 | } | |
3242 | return rc; | |
3243 | } | |
3244 | ||
1ae46317 | 3245 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3246 | { |
1ae46317 TH |
3247 | int tries = 5; |
3248 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3249 | struct ata_link *link; |
1ae46317 | 3250 | struct ata_device *dev; |
644dd0cc | 3251 | |
198e0fed | 3252 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3253 | return; |
3254 | ||
1ae46317 | 3255 | repeat: |
1eca4365 TH |
3256 | ata_for_each_link(link, ap, EDGE) { |
3257 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 TH |
3258 | struct scsi_device *sdev; |
3259 | int channel = 0, id = 0; | |
3edebac4 | 3260 | |
1eca4365 | 3261 | if (dev->sdev) |
41bda9c9 | 3262 | continue; |
3f19ee8c | 3263 | |
41bda9c9 TH |
3264 | if (ata_is_host_link(link)) |
3265 | id = dev->devno; | |
3266 | else | |
3267 | channel = link->pmp; | |
3268 | ||
3269 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3270 | NULL); | |
3271 | if (!IS_ERR(sdev)) { | |
3272 | dev->sdev = sdev; | |
3273 | scsi_device_put(sdev); | |
3274 | } | |
3edebac4 | 3275 | } |
3f19ee8c | 3276 | } |
1ae46317 TH |
3277 | |
3278 | /* If we scanned while EH was in progress or allocation | |
3279 | * failure occurred, scan would have failed silently. Check | |
3280 | * whether all devices are attached. | |
3281 | */ | |
1eca4365 TH |
3282 | ata_for_each_link(link, ap, EDGE) { |
3283 | ata_for_each_dev(dev, link, ENABLED) { | |
3284 | if (!dev->sdev) | |
41bda9c9 TH |
3285 | goto exit_loop; |
3286 | } | |
1ae46317 | 3287 | } |
41bda9c9 TH |
3288 | exit_loop: |
3289 | if (!link) | |
1ae46317 TH |
3290 | return; |
3291 | ||
3292 | /* we're missing some SCSI devices */ | |
3293 | if (sync) { | |
3294 | /* If caller requested synchrnous scan && we've made | |
3295 | * any progress, sleep briefly and repeat. | |
3296 | */ | |
3297 | if (dev != last_failed_dev) { | |
3298 | msleep(100); | |
3299 | last_failed_dev = dev; | |
3300 | goto repeat; | |
3301 | } | |
3302 | ||
3303 | /* We might be failing to detect boot device, give it | |
3304 | * a few more chances. | |
3305 | */ | |
3306 | if (--tries) { | |
3307 | msleep(100); | |
3308 | goto repeat; | |
3309 | } | |
3310 | ||
3311 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3312 | "failed without making any progress,\n" | |
3313 | " switching to async\n"); | |
3314 | } | |
3315 | ||
3316 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3317 | round_jiffies_relative(HZ)); | |
644dd0cc | 3318 | } |
0ea035a3 TH |
3319 | |
3320 | /** | |
3321 | * ata_scsi_offline_dev - offline attached SCSI device | |
3322 | * @dev: ATA device to offline attached SCSI device for | |
3323 | * | |
3324 | * This function is called from ata_eh_hotplug() and responsible | |
3325 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3326 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3327 | * against clearing. |
3328 | * | |
3329 | * LOCKING: | |
cca3974e | 3330 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3331 | * |
3332 | * RETURNS: | |
3333 | * 1 if attached SCSI device exists, 0 otherwise. | |
3334 | */ | |
3335 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3336 | { | |
3337 | if (dev->sdev) { | |
3338 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3339 | return 1; | |
3340 | } | |
3341 | return 0; | |
3342 | } | |
580b2102 TH |
3343 | |
3344 | /** | |
3345 | * ata_scsi_remove_dev - remove attached SCSI device | |
3346 | * @dev: ATA device to remove attached SCSI device for | |
3347 | * | |
3348 | * This function is called from ata_eh_scsi_hotplug() and | |
3349 | * responsible for removing the SCSI device attached to @dev. | |
3350 | * | |
3351 | * LOCKING: | |
3352 | * Kernel thread context (may sleep). | |
3353 | */ | |
3354 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3355 | { | |
9af5c9c9 | 3356 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3357 | struct scsi_device *sdev; |
3358 | unsigned long flags; | |
3359 | ||
3360 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3361 | * state doesn't change underneath us and thus | |
3362 | * scsi_device_get() always succeeds. The mutex locking can | |
3363 | * be removed if there is __scsi_device_get() interface which | |
3364 | * increments reference counts regardless of device state. | |
3365 | */ | |
cca3974e | 3366 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3367 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3368 | |
cca3974e | 3369 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3370 | sdev = dev->sdev; |
3371 | dev->sdev = NULL; | |
3372 | ||
3373 | if (sdev) { | |
3374 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3375 | * away underneath us after the host lock and |
580b2102 TH |
3376 | * scan_mutex are released. Hold onto it. |
3377 | */ | |
3378 | if (scsi_device_get(sdev) == 0) { | |
3379 | /* The following ensures the attached sdev is | |
3380 | * offline on return from ata_scsi_offline_dev() | |
3381 | * regardless it wins or loses the race | |
3382 | * against this function. | |
3383 | */ | |
3384 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3385 | } else { | |
3386 | WARN_ON(1); | |
3387 | sdev = NULL; | |
3388 | } | |
3389 | } | |
3390 | ||
ba6a1308 | 3391 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3392 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3393 | |
3394 | if (sdev) { | |
3395 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
b9d5fc41 | 3396 | dev_name(&sdev->sdev_gendev)); |
580b2102 TH |
3397 | |
3398 | scsi_remove_device(sdev); | |
3399 | scsi_device_put(sdev); | |
3400 | } | |
3401 | } | |
3402 | ||
41bda9c9 TH |
3403 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3404 | { | |
3405 | struct ata_port *ap = link->ap; | |
3406 | struct ata_device *dev; | |
3407 | ||
1eca4365 | 3408 | ata_for_each_dev(dev, link, ALL) { |
41bda9c9 TH |
3409 | unsigned long flags; |
3410 | ||
3411 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3412 | continue; | |
3413 | ||
3414 | spin_lock_irqsave(ap->lock, flags); | |
3415 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3416 | spin_unlock_irqrestore(ap->lock, flags); | |
3417 | ||
3418 | ata_scsi_remove_dev(dev); | |
3419 | } | |
3420 | } | |
3421 | ||
2f294968 KCA |
3422 | /** |
3423 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3424 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3425 | * |
3426 | * Tell the block layer to send a media change notification | |
3427 | * event. | |
3428 | * | |
3429 | * LOCKING: | |
854c73a2 | 3430 | * spin_lock_irqsave(host lock) |
2f294968 | 3431 | */ |
854c73a2 | 3432 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3433 | { |
854c73a2 | 3434 | if (dev->sdev) |
f26792d5 JG |
3435 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3436 | GFP_ATOMIC); | |
2f294968 | 3437 | } |
2f294968 | 3438 | |
580b2102 TH |
3439 | /** |
3440 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3441 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3442 | * |
3443 | * Perform SCSI part of hotplug. It's executed from a separate | |
3444 | * workqueue after EH completes. This is necessary because SCSI | |
3445 | * hot plugging requires working EH and hot unplugging is | |
3446 | * synchronized with hot plugging with a mutex. | |
3447 | * | |
3448 | * LOCKING: | |
3449 | * Kernel thread context (may sleep). | |
3450 | */ | |
65f27f38 | 3451 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3452 | { |
65f27f38 DH |
3453 | struct ata_port *ap = |
3454 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3455 | int i; |
580b2102 | 3456 | |
b51e9e5d | 3457 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3458 | DPRINTK("ENTER/EXIT - unloading\n"); |
3459 | return; | |
3460 | } | |
3461 | ||
3462 | DPRINTK("ENTER\n"); | |
3463 | ||
41bda9c9 TH |
3464 | /* Unplug detached devices. We cannot use link iterator here |
3465 | * because PMP links have to be scanned even if PMP is | |
3466 | * currently not attached. Iterate manually. | |
3467 | */ | |
3468 | ata_scsi_handle_link_detach(&ap->link); | |
3469 | if (ap->pmp_link) | |
3470 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3471 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3472 | |
3473 | /* scan for new ones */ | |
1ae46317 | 3474 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3475 | |
3476 | DPRINTK("EXIT\n"); | |
3477 | } | |
83c47bcb TH |
3478 | |
3479 | /** | |
3480 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3481 | * @shost: SCSI host to scan | |
3482 | * @channel: Channel to scan | |
3483 | * @id: ID to scan | |
3484 | * @lun: LUN to scan | |
3485 | * | |
3486 | * This function is called when user explicitly requests bus | |
3487 | * scan. Set probe pending flag and invoke EH. | |
3488 | * | |
3489 | * LOCKING: | |
3490 | * SCSI layer (we don't care) | |
3491 | * | |
3492 | * RETURNS: | |
3493 | * Zero. | |
3494 | */ | |
3495 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3496 | unsigned int id, unsigned int lun) | |
3497 | { | |
3498 | struct ata_port *ap = ata_shost_to_port(shost); | |
3499 | unsigned long flags; | |
41bda9c9 | 3500 | int devno, rc = 0; |
83c47bcb TH |
3501 | |
3502 | if (!ap->ops->error_handler) | |
3503 | return -EOPNOTSUPP; | |
3504 | ||
41bda9c9 | 3505 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3506 | return -EINVAL; |
3507 | ||
071f44b1 | 3508 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
3509 | if (channel != SCAN_WILD_CARD && channel) |
3510 | return -EINVAL; | |
3511 | devno = id; | |
3512 | } else { | |
3513 | if (id != SCAN_WILD_CARD && id) | |
3514 | return -EINVAL; | |
3515 | devno = channel; | |
3516 | } | |
3517 | ||
ba6a1308 | 3518 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3519 | |
41bda9c9 TH |
3520 | if (devno == SCAN_WILD_CARD) { |
3521 | struct ata_link *link; | |
3522 | ||
1eca4365 | 3523 | ata_for_each_link(link, ap, EDGE) { |
41bda9c9 | 3524 | struct ata_eh_info *ehi = &link->eh_info; |
b558eddd | 3525 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 3526 | ehi->action |= ATA_EH_RESET; |
41bda9c9 | 3527 | } |
83c47bcb | 3528 | } else { |
41bda9c9 | 3529 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3530 | |
3531 | if (dev) { | |
41bda9c9 | 3532 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 | 3533 | ehi->probe_mask |= 1 << dev->devno; |
cf480626 | 3534 | ehi->action |= ATA_EH_RESET; |
83c47bcb TH |
3535 | } else |
3536 | rc = -EINVAL; | |
3537 | } | |
3538 | ||
309afcb5 | 3539 | if (rc == 0) { |
83c47bcb | 3540 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3541 | spin_unlock_irqrestore(ap->lock, flags); |
3542 | ata_port_wait_eh(ap); | |
3543 | } else | |
3544 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3545 | |
3546 | return rc; | |
3547 | } | |
3057ac3c | 3548 | |
3549 | /** | |
d0171269 | 3550 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3551 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3552 | * |
d0171269 TH |
3553 | * After ATA pass thru (SAT) commands are executed successfully, |
3554 | * libata need to propagate the changes to SCSI layer. This | |
3555 | * function must be executed from ata_aux_wq such that sdev | |
3556 | * attach/detach don't race with rescan. | |
3057ac3c | 3557 | * |
d0171269 TH |
3558 | * LOCKING: |
3559 | * Kernel thread context (may sleep). | |
3057ac3c | 3560 | */ |
65f27f38 | 3561 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3562 | { |
65f27f38 DH |
3563 | struct ata_port *ap = |
3564 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3565 | struct ata_link *link; |
f58229f8 | 3566 | struct ata_device *dev; |
f84e7e41 | 3567 | unsigned long flags; |
3057ac3c | 3568 | |
f84e7e41 TH |
3569 | spin_lock_irqsave(ap->lock, flags); |
3570 | ||
1eca4365 TH |
3571 | ata_for_each_link(link, ap, EDGE) { |
3572 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 | 3573 | struct scsi_device *sdev = dev->sdev; |
3057ac3c | 3574 | |
1eca4365 | 3575 | if (!sdev) |
41bda9c9 TH |
3576 | continue; |
3577 | if (scsi_device_get(sdev)) | |
3578 | continue; | |
f84e7e41 | 3579 | |
41bda9c9 TH |
3580 | spin_unlock_irqrestore(ap->lock, flags); |
3581 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3582 | scsi_device_put(sdev); | |
3583 | spin_lock_irqsave(ap->lock, flags); | |
3584 | } | |
3057ac3c | 3585 | } |
f84e7e41 TH |
3586 | |
3587 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3588 | } |
80289167 BK |
3589 | |
3590 | /** | |
3591 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3592 | * @host: ATA host container for all SAS ports |
80289167 | 3593 | * @port_info: Information from low-level host driver |
cca3974e | 3594 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3595 | * |
3596 | * LOCKING: | |
3597 | * PCI/etc. bus probe sem. | |
3598 | * | |
3599 | * RETURNS: | |
3600 | * ata_port pointer on success / NULL on failure. | |
3601 | */ | |
3602 | ||
cca3974e | 3603 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3604 | struct ata_port_info *port_info, |
cca3974e | 3605 | struct Scsi_Host *shost) |
80289167 | 3606 | { |
f3187195 | 3607 | struct ata_port *ap; |
80289167 | 3608 | |
f3187195 | 3609 | ap = ata_port_alloc(host); |
80289167 BK |
3610 | if (!ap) |
3611 | return NULL; | |
3612 | ||
f3187195 | 3613 | ap->port_no = 0; |
cca3974e | 3614 | ap->lock = shost->host_lock; |
f3187195 TH |
3615 | ap->pio_mask = port_info->pio_mask; |
3616 | ap->mwdma_mask = port_info->mwdma_mask; | |
3617 | ap->udma_mask = port_info->udma_mask; | |
3618 | ap->flags |= port_info->flags; | |
3619 | ap->ops = port_info->port_ops; | |
3620 | ap->cbl = ATA_CBL_SATA; | |
3621 | ||
80289167 BK |
3622 | return ap; |
3623 | } | |
3624 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3625 | ||
3626 | /** | |
3627 | * ata_sas_port_start - Set port up for dma. | |
3628 | * @ap: Port to initialize | |
3629 | * | |
3630 | * Called just after data structures for each port are | |
dde20207 | 3631 | * initialized. |
80289167 BK |
3632 | * |
3633 | * May be used as the port_start() entry in ata_port_operations. | |
3634 | * | |
3635 | * LOCKING: | |
3636 | * Inherited from caller. | |
3637 | */ | |
3638 | int ata_sas_port_start(struct ata_port *ap) | |
3639 | { | |
dde20207 | 3640 | return 0; |
80289167 BK |
3641 | } |
3642 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3643 | ||
3644 | /** | |
3645 | * ata_port_stop - Undo ata_sas_port_start() | |
3646 | * @ap: Port to shut down | |
3647 | * | |
80289167 BK |
3648 | * May be used as the port_stop() entry in ata_port_operations. |
3649 | * | |
3650 | * LOCKING: | |
3651 | * Inherited from caller. | |
3652 | */ | |
3653 | ||
3654 | void ata_sas_port_stop(struct ata_port *ap) | |
3655 | { | |
80289167 BK |
3656 | } |
3657 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3658 | ||
3659 | /** | |
3660 | * ata_sas_port_init - Initialize a SATA device | |
3661 | * @ap: SATA port to initialize | |
3662 | * | |
3663 | * LOCKING: | |
3664 | * PCI/etc. bus probe sem. | |
3665 | * | |
3666 | * RETURNS: | |
3667 | * Zero on success, non-zero on error. | |
3668 | */ | |
3669 | ||
3670 | int ata_sas_port_init(struct ata_port *ap) | |
3671 | { | |
3672 | int rc = ap->ops->port_start(ap); | |
3673 | ||
f3187195 TH |
3674 | if (!rc) { |
3675 | ap->print_id = ata_print_id++; | |
80289167 | 3676 | rc = ata_bus_probe(ap); |
f3187195 | 3677 | } |
80289167 BK |
3678 | |
3679 | return rc; | |
3680 | } | |
3681 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3682 | ||
3683 | /** | |
3684 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3685 | * @ap: SATA port to destroy | |
3686 | * | |
3687 | */ | |
3688 | ||
3689 | void ata_sas_port_destroy(struct ata_port *ap) | |
3690 | { | |
f0d36efd TH |
3691 | if (ap->ops->port_stop) |
3692 | ap->ops->port_stop(ap); | |
80289167 BK |
3693 | kfree(ap); |
3694 | } | |
3695 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3696 | ||
3697 | /** | |
3698 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3699 | * @sdev: SCSI device to configure | |
3700 | * @ap: ATA port to which SCSI device is attached | |
3701 | * | |
3702 | * RETURNS: | |
3703 | * Zero. | |
3704 | */ | |
3705 | ||
3706 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3707 | { | |
3708 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3709 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3710 | return 0; |
3711 | } | |
3712 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3713 | ||
3714 | /** | |
3715 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3716 | * @cmd: SCSI command to be sent | |
3717 | * @done: Completion function, called when command is complete | |
3718 | * @ap: ATA port to which the command is being sent | |
3719 | * | |
3720 | * RETURNS: | |
08475a19 BK |
3721 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3722 | * 0 otherwise. | |
80289167 BK |
3723 | */ |
3724 | ||
3725 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3726 | struct ata_port *ap) | |
3727 | { | |
08475a19 BK |
3728 | int rc = 0; |
3729 | ||
80289167 BK |
3730 | ata_scsi_dump_cdb(ap, cmd); |
3731 | ||
2486fa56 | 3732 | if (likely(ata_dev_enabled(ap->link.device))) |
9af5c9c9 | 3733 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); |
80289167 BK |
3734 | else { |
3735 | cmd->result = (DID_BAD_TARGET << 16); | |
3736 | done(cmd); | |
3737 | } | |
08475a19 | 3738 | return rc; |
80289167 BK |
3739 | } |
3740 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |