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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 | } | |
ea7a5ed5 | 316 | DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, |
18f7ba4c KCA |
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 | } | |
ea7a5ed5 | 369 | DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, |
18f7ba4c KCA |
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 | ||
e3cf95dd AC |
650 | static int ata_ioc32(struct ata_port *ap) |
651 | { | |
652 | if (ap->flags & ATA_FLAG_PIO_DMA) | |
653 | return 1; | |
654 | if (ap->pflags & ATA_PFLAG_PIO32) | |
655 | return 1; | |
656 | return 0; | |
657 | } | |
658 | ||
94be9a58 JG |
659 | int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, |
660 | int cmd, void __user *arg) | |
1da177e4 | 661 | { |
1da177e4 | 662 | int val = -EINVAL, rc = -EINVAL; |
e3cf95dd | 663 | unsigned long flags; |
1da177e4 | 664 | |
1da177e4 LT |
665 | switch (cmd) { |
666 | case ATA_IOC_GET_IO32: | |
e3cf95dd AC |
667 | spin_lock_irqsave(ap->lock, flags); |
668 | val = ata_ioc32(ap); | |
669 | spin_unlock_irqrestore(ap->lock, flags); | |
1da177e4 LT |
670 | if (copy_to_user(arg, &val, 1)) |
671 | return -EFAULT; | |
672 | return 0; | |
673 | ||
674 | case ATA_IOC_SET_IO32: | |
675 | val = (unsigned long) arg; | |
e3cf95dd AC |
676 | rc = 0; |
677 | spin_lock_irqsave(ap->lock, flags); | |
678 | if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { | |
679 | if (val) | |
680 | ap->pflags |= ATA_PFLAG_PIO32; | |
681 | else | |
682 | ap->pflags &= ~ATA_PFLAG_PIO32; | |
683 | } else { | |
684 | if (val != ata_ioc32(ap)) | |
685 | rc = -EINVAL; | |
686 | } | |
687 | spin_unlock_irqrestore(ap->lock, flags); | |
688 | return rc; | |
1da177e4 | 689 | |
5924b74c | 690 | case HDIO_GET_IDENTITY: |
94be9a58 | 691 | return ata_get_identity(ap, scsidev, arg); |
5924b74c | 692 | |
b095518e JG |
693 | case HDIO_DRIVE_CMD: |
694 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
695 | return -EACCES; | |
696 | return ata_cmd_ioctl(scsidev, arg); | |
697 | ||
698 | case HDIO_DRIVE_TASK: | |
699 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
700 | return -EACCES; | |
701 | return ata_task_ioctl(scsidev, arg); | |
702 | ||
1da177e4 LT |
703 | default: |
704 | rc = -ENOTTY; | |
705 | break; | |
706 | } | |
707 | ||
1da177e4 LT |
708 | return rc; |
709 | } | |
94be9a58 JG |
710 | EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); |
711 | ||
712 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
713 | { | |
714 | return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), | |
715 | scsidev, cmd, arg); | |
716 | } | |
717 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); | |
1da177e4 LT |
718 | |
719 | /** | |
720 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
721 | * @dev: ATA device to which the new command is attached |
722 | * @cmd: SCSI command that originated this ATA command | |
723 | * @done: SCSI command completion function | |
724 | * | |
725 | * Obtain a reference to an unused ata_queued_cmd structure, | |
726 | * which is the basic libata structure representing a single | |
727 | * ATA command sent to the hardware. | |
728 | * | |
729 | * If a command was available, fill in the SCSI-specific | |
730 | * portions of the structure with information on the | |
731 | * current command. | |
732 | * | |
733 | * LOCKING: | |
cca3974e | 734 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
735 | * |
736 | * RETURNS: | |
737 | * Command allocated, or %NULL if none available. | |
738 | */ | |
7102d230 AB |
739 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
740 | struct scsi_cmnd *cmd, | |
741 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
742 | { |
743 | struct ata_queued_cmd *qc; | |
744 | ||
8a8bc223 | 745 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
746 | if (qc) { |
747 | qc->scsicmd = cmd; | |
748 | qc->scsidone = done; | |
749 | ||
ff2aeb1e | 750 | qc->sg = scsi_sglist(cmd); |
7120165c | 751 | qc->n_elem = scsi_sg_count(cmd); |
1da177e4 LT |
752 | } else { |
753 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
754 | done(cmd); | |
755 | } | |
756 | ||
757 | return qc; | |
758 | } | |
759 | ||
aacda375 TH |
760 | static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) |
761 | { | |
762 | struct scsi_cmnd *scmd = qc->scsicmd; | |
763 | ||
764 | qc->extrabytes = scmd->request->extra_len; | |
765 | qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; | |
766 | } | |
767 | ||
b095518e JG |
768 | /** |
769 | * ata_dump_status - user friendly display of error info | |
770 | * @id: id of the port in question | |
771 | * @tf: ptr to filled out taskfile | |
772 | * | |
773 | * Decode and dump the ATA error/status registers for the user so | |
774 | * that they have some idea what really happened at the non | |
775 | * make-believe layer. | |
776 | * | |
777 | * LOCKING: | |
778 | * inherited from caller | |
779 | */ | |
7102d230 | 780 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
781 | { |
782 | u8 stat = tf->command, err = tf->feature; | |
783 | ||
784 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
785 | if (stat & ATA_BUSY) { | |
786 | printk("Busy }\n"); /* Data is not valid in this case */ | |
787 | } else { | |
788 | if (stat & 0x40) printk("DriveReady "); | |
789 | if (stat & 0x20) printk("DeviceFault "); | |
790 | if (stat & 0x10) printk("SeekComplete "); | |
791 | if (stat & 0x08) printk("DataRequest "); | |
792 | if (stat & 0x04) printk("CorrectedError "); | |
793 | if (stat & 0x02) printk("Index "); | |
794 | if (stat & 0x01) printk("Error "); | |
795 | printk("}\n"); | |
796 | ||
797 | if (err) { | |
798 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
799 | if (err & 0x04) printk("DriveStatusError "); | |
800 | if (err & 0x80) { | |
801 | if (err & 0x04) printk("BadCRC "); | |
802 | else printk("Sector "); | |
803 | } | |
804 | if (err & 0x40) printk("UncorrectableError "); | |
805 | if (err & 0x10) printk("SectorIdNotFound "); | |
806 | if (err & 0x02) printk("TrackZeroNotFound "); | |
807 | if (err & 0x01) printk("AddrMarkNotFound "); | |
808 | printk("}\n"); | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
1da177e4 LT |
813 | /** |
814 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 815 | * @id: ATA device number |
1da177e4 | 816 | * @drv_stat: value contained in ATA status register |
b095518e JG |
817 | * @drv_err: value contained in ATA error register |
818 | * @sk: the sense key we'll fill out | |
819 | * @asc: the additional sense code we'll fill out | |
820 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 821 | * @verbose: be verbose |
1da177e4 | 822 | * |
b095518e JG |
823 | * Converts an ATA error into a SCSI error. Fill out pointers to |
824 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
825 | * format sense blocks. | |
1da177e4 LT |
826 | * |
827 | * LOCKING: | |
cca3974e | 828 | * spin_lock_irqsave(host lock) |
1da177e4 | 829 | */ |
7102d230 AB |
830 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
831 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 832 | { |
b095518e | 833 | int i; |
ffe75ef6 | 834 | |
1da177e4 | 835 | /* Based on the 3ware driver translation table */ |
98ac62de | 836 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
837 | /* BBD|ECC|ID|MAR */ |
838 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
839 | /* BBD|ECC|ID */ | |
840 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
841 | /* ECC|MC|MARK */ | |
842 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
843 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
844 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
845 | /* MC|ID|ABRT|TRK0|MARK */ | |
846 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
847 | /* MCR|MARK */ | |
848 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
849 | /* Bad address mark */ | |
850 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
851 | /* TRK0 */ | |
852 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
853 | /* Abort & !ICRC */ | |
854 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
855 | /* Media change request */ | |
856 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
857 | /* SRV */ | |
858 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
859 | /* Media change */ | |
860 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
861 | /* ECC */ | |
862 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
863 | /* BBD - block marked bad */ | |
864 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
865 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
866 | }; | |
98ac62de | 867 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
868 | /* Must be first because BUSY means no other bits valid */ |
869 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
870 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
871 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
872 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
873 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
874 | }; | |
1da177e4 | 875 | |
1da177e4 LT |
876 | /* |
877 | * Is this an error we can process/parse | |
878 | */ | |
b095518e JG |
879 | if (drv_stat & ATA_BUSY) { |
880 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 881 | } |
b095518e JG |
882 | |
883 | if (drv_err) { | |
884 | /* Look for drv_err */ | |
885 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
886 | /* Look for best matches first */ | |
2e9edbf8 | 887 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
888 | sense_table[i][0]) { |
889 | *sk = sense_table[i][1]; | |
890 | *asc = sense_table[i][2]; | |
891 | *ascq = sense_table[i][3]; | |
892 | goto translate_done; | |
893 | } | |
894 | } | |
895 | /* No immediate match */ | |
246619da TH |
896 | if (verbose) |
897 | printk(KERN_WARNING "ata%u: no sense translation for " | |
898 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 899 | } |
b095518e JG |
900 | |
901 | /* Fall back to interpreting status bits */ | |
902 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
903 | if (stat_table[i][0] & drv_stat) { | |
904 | *sk = stat_table[i][1]; | |
905 | *asc = stat_table[i][2]; | |
906 | *ascq = stat_table[i][3]; | |
907 | goto translate_done; | |
1da177e4 | 908 | } |
b095518e JG |
909 | } |
910 | /* No error? Undecoded? */ | |
246619da TH |
911 | if (verbose) |
912 | printk(KERN_WARNING "ata%u: no sense translation for " | |
913 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 914 | |
2d202024 AC |
915 | /* We need a sensible error return here, which is tricky, and one |
916 | that won't cause people to do things like return a disk wrongly */ | |
917 | *sk = ABORTED_COMMAND; | |
918 | *asc = 0x00; | |
919 | *ascq = 0x00; | |
b095518e JG |
920 | |
921 | translate_done: | |
246619da TH |
922 | if (verbose) |
923 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
924 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
925 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
926 | return; |
927 | } | |
928 | ||
929 | /* | |
750426aa | 930 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
931 | * @qc: Command that completed. |
932 | * | |
933 | * This function is specific to the ATA descriptor format sense | |
934 | * block specified for the ATA pass through commands. Regardless | |
935 | * of whether the command errored or not, return a sense | |
936 | * block. Copy all controller registers into the sense | |
937 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
938 | * | |
939 | * LOCKING: | |
750426aa | 940 | * None. |
b095518e | 941 | */ |
750426aa | 942 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
943 | { |
944 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 945 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
946 | unsigned char *sb = cmd->sense_buffer; |
947 | unsigned char *desc = sb + 8; | |
246619da | 948 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
949 | |
950 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
951 | ||
0e5dec47 | 952 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 953 | |
b095518e JG |
954 | /* |
955 | * Use ata_to_sense_error() to map status register bits | |
956 | * onto sense key, asc & ascq. | |
957 | */ | |
058e55e1 TH |
958 | if (qc->err_mask || |
959 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 960 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 961 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 962 | sb[1] &= 0x0f; |
1da177e4 LT |
963 | } |
964 | ||
b095518e JG |
965 | /* |
966 | * Sense data is current and format is descriptor. | |
967 | */ | |
968 | sb[0] = 0x72; | |
1da177e4 | 969 | |
b095518e JG |
970 | desc[0] = 0x09; |
971 | ||
f38621b3 TH |
972 | /* set length of additional sense data */ |
973 | sb[7] = 14; | |
974 | desc[1] = 12; | |
b095518e JG |
975 | |
976 | /* | |
977 | * Copy registers into sense buffer. | |
978 | */ | |
979 | desc[2] = 0x00; | |
980 | desc[3] = tf->feature; /* == error reg */ | |
981 | desc[5] = tf->nsect; | |
982 | desc[7] = tf->lbal; | |
983 | desc[9] = tf->lbam; | |
984 | desc[11] = tf->lbah; | |
985 | desc[12] = tf->device; | |
986 | desc[13] = tf->command; /* == status reg */ | |
987 | ||
988 | /* | |
989 | * Fill in Extend bit, and the high order bytes | |
990 | * if applicable. | |
991 | */ | |
992 | if (tf->flags & ATA_TFLAG_LBA48) { | |
993 | desc[2] |= 0x01; | |
994 | desc[4] = tf->hob_nsect; | |
995 | desc[6] = tf->hob_lbal; | |
996 | desc[8] = tf->hob_lbam; | |
997 | desc[10] = tf->hob_lbah; | |
1da177e4 | 998 | } |
b095518e | 999 | } |
1da177e4 | 1000 | |
b095518e | 1001 | /** |
750426aa | 1002 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
1003 | * @qc: Command that we are erroring out |
1004 | * | |
d25614ba TH |
1005 | * Generate sense block for a failed ATA command @qc. Descriptor |
1006 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
1007 | * |
1008 | * LOCKING: | |
750426aa | 1009 | * None. |
b095518e | 1010 | */ |
750426aa | 1011 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 1012 | { |
d25614ba | 1013 | struct ata_device *dev = qc->dev; |
b095518e | 1014 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 1015 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 1016 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 1017 | unsigned char *desc = sb + 8; |
246619da | 1018 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 1019 | u64 block; |
b095518e JG |
1020 | |
1021 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
1022 | ||
0e5dec47 | 1023 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 1024 | |
d25614ba TH |
1025 | /* sense data is current and format is descriptor */ |
1026 | sb[0] = 0x72; | |
1027 | ||
1028 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
1029 | * onto sense key, asc & ascq. |
1030 | */ | |
058e55e1 TH |
1031 | if (qc->err_mask || |
1032 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 1033 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
1034 | &sb[1], &sb[2], &sb[3], verbose); |
1035 | sb[1] &= 0x0f; | |
1da177e4 | 1036 | } |
1da177e4 | 1037 | |
d25614ba | 1038 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 1039 | |
d25614ba TH |
1040 | /* information sense data descriptor */ |
1041 | sb[7] = 12; | |
1042 | desc[0] = 0x00; | |
1043 | desc[1] = 10; | |
a7dac447 | 1044 | |
d25614ba TH |
1045 | desc[2] |= 0x80; /* valid */ |
1046 | desc[6] = block >> 40; | |
1047 | desc[7] = block >> 32; | |
1048 | desc[8] = block >> 24; | |
1049 | desc[9] = block >> 16; | |
1050 | desc[10] = block >> 8; | |
1051 | desc[11] = block; | |
1da177e4 LT |
1052 | } |
1053 | ||
a6cce2a7 BK |
1054 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
1055 | { | |
1056 | sdev->use_10_for_rw = 1; | |
1057 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
1058 | |
1059 | /* Schedule policy is determined by ->qc_defer() callback and | |
1060 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
1061 | * prevent SCSI midlayer from automatically deferring | |
1062 | * requests. | |
1063 | */ | |
1064 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
1065 | } |
1066 | ||
fa2fc7f4 JB |
1067 | /** |
1068 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 1069 | * @rq: request to be checked |
fa2fc7f4 JB |
1070 | * |
1071 | * ATAPI commands which transfer variable length data to host | |
1072 | * might overflow due to application error or hardare bug. This | |
1073 | * function checks whether overflow should be drained and ignored | |
1074 | * for @request. | |
1075 | * | |
1076 | * LOCKING: | |
1077 | * None. | |
1078 | * | |
1079 | * RETURNS: | |
1080 | * 1 if ; otherwise, 0. | |
1081 | */ | |
1082 | static int atapi_drain_needed(struct request *rq) | |
1083 | { | |
1084 | if (likely(!blk_pc_request(rq))) | |
1085 | return 0; | |
1086 | ||
b0790410 | 1087 | if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_RW)) |
fa2fc7f4 JB |
1088 | return 0; |
1089 | ||
1090 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
1091 | } | |
1092 | ||
1093 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
1094 | struct ata_device *dev) | |
a6cce2a7 | 1095 | { |
45fabbb7 EO |
1096 | if (!ata_id_has_unload(dev->id)) |
1097 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
1098 | ||
914ed354 TH |
1099 | /* configure max sectors */ |
1100 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 1101 | |
fa2fc7f4 JB |
1102 | if (dev->class == ATA_DEV_ATAPI) { |
1103 | struct request_queue *q = sdev->request_queue; | |
1104 | void *buf; | |
1105 | ||
e3790c7d | 1106 | /* set the min alignment and padding */ |
d0ad3bc9 JB |
1107 | blk_queue_update_dma_alignment(sdev->request_queue, |
1108 | ATA_DMA_PAD_SZ - 1); | |
27f8221a FT |
1109 | blk_queue_update_dma_pad(sdev->request_queue, |
1110 | ATA_DMA_PAD_SZ - 1); | |
fa2fc7f4 JB |
1111 | |
1112 | /* configure draining */ | |
1113 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
1114 | if (!buf) { | |
1115 | ata_dev_printk(dev, KERN_ERR, | |
1116 | "drain buffer allocation failed\n"); | |
1117 | return -ENOMEM; | |
1118 | } | |
1119 | ||
1120 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
1121 | } else { | |
8bff7c6b JA |
1122 | if (ata_id_is_ssd(dev->id)) |
1123 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, | |
1124 | sdev->request_queue); | |
1125 | ||
d0ad3bc9 JB |
1126 | /* ATA devices must be sector aligned */ |
1127 | blk_queue_update_dma_alignment(sdev->request_queue, | |
1128 | ATA_SECT_SIZE - 1); | |
d8cf5389 | 1129 | sdev->manage_start_stop = 1; |
dde20207 | 1130 | } |
d8cf5389 | 1131 | |
f26792d5 JG |
1132 | if (dev->flags & ATA_DFLAG_AN) |
1133 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
1134 | ||
a6e6ce8e TH |
1135 | if (dev->flags & ATA_DFLAG_NCQ) { |
1136 | int depth; | |
1137 | ||
1138 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
1139 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
8a8bc223 | 1140 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); |
a6e6ce8e | 1141 | } |
fa2fc7f4 JB |
1142 | |
1143 | return 0; | |
a6cce2a7 BK |
1144 | } |
1145 | ||
1da177e4 LT |
1146 | /** |
1147 | * ata_scsi_slave_config - Set SCSI device attributes | |
1148 | * @sdev: SCSI device to examine | |
1149 | * | |
1150 | * This is called before we actually start reading | |
1151 | * and writing to the device, to configure certain | |
1152 | * SCSI mid-layer behaviors. | |
1153 | * | |
1154 | * LOCKING: | |
1155 | * Defined by SCSI layer. We don't really care. | |
1156 | */ | |
1157 | ||
1158 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
1159 | { | |
31534363 TH |
1160 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
1161 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 1162 | int rc = 0; |
31534363 | 1163 | |
a6cce2a7 | 1164 | ata_scsi_sdev_config(sdev); |
1da177e4 | 1165 | |
31534363 | 1166 | if (dev) |
fa2fc7f4 | 1167 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 1168 | |
fa2fc7f4 | 1169 | return rc; |
1da177e4 LT |
1170 | } |
1171 | ||
83c47bcb TH |
1172 | /** |
1173 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
1174 | * @sdev: SCSI device to be destroyed | |
1175 | * | |
1176 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
1177 | * this unplugging was initiated by libata as indicated by NULL | |
1178 | * dev->sdev, this function doesn't have to do anything. | |
1179 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
1180 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
1181 | * EH. | |
1182 | * | |
1183 | * LOCKING: | |
1184 | * Defined by SCSI layer. We don't really care. | |
1185 | */ | |
1186 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
1187 | { | |
1188 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 1189 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
1190 | unsigned long flags; |
1191 | struct ata_device *dev; | |
1192 | ||
1193 | if (!ap->ops->error_handler) | |
1194 | return; | |
1195 | ||
ba6a1308 | 1196 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
1197 | dev = __ata_scsi_find_dev(ap, sdev); |
1198 | if (dev && dev->sdev) { | |
1199 | /* SCSI device already in CANCEL state, no need to offline it */ | |
1200 | dev->sdev = NULL; | |
1201 | dev->flags |= ATA_DFLAG_DETACH; | |
1202 | ata_port_schedule_eh(ap); | |
1203 | } | |
ba6a1308 | 1204 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
1205 | |
1206 | kfree(q->dma_drain_buffer); | |
1207 | q->dma_drain_buffer = NULL; | |
1208 | q->dma_drain_size = 0; | |
83c47bcb TH |
1209 | } |
1210 | ||
a6e6ce8e TH |
1211 | /** |
1212 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
1213 | * @sdev: SCSI device to configure queue depth for | |
1214 | * @queue_depth: new queue depth | |
1215 | * | |
1216 | * This is libata standard hostt->change_queue_depth callback. | |
1217 | * SCSI will call into this callback when user tries to set queue | |
1218 | * depth via sysfs. | |
1219 | * | |
1220 | * LOCKING: | |
1221 | * SCSI layer (we don't care) | |
1222 | * | |
1223 | * RETURNS: | |
1224 | * Newly configured queue depth. | |
1225 | */ | |
1226 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
1227 | { | |
1228 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
1229 | struct ata_device *dev; | |
360f654e | 1230 | unsigned long flags; |
a6e6ce8e | 1231 | |
c3c70c44 | 1232 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
1233 | return sdev->queue_depth; |
1234 | ||
1235 | dev = ata_scsi_find_dev(ap, sdev); | |
1236 | if (!dev || !ata_dev_enabled(dev)) | |
1237 | return sdev->queue_depth; | |
1238 | ||
c3c70c44 | 1239 | /* NCQ enabled? */ |
360f654e | 1240 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
1241 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
1242 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 1243 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
1244 | queue_depth = 1; |
1245 | } | |
360f654e TH |
1246 | spin_unlock_irqrestore(ap->lock, flags); |
1247 | ||
c3c70c44 TH |
1248 | /* limit and apply queue depth */ |
1249 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1250 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1251 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1252 | ||
1253 | if (sdev->queue_depth == queue_depth) | |
1254 | return -EINVAL; | |
1255 | ||
1256 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1257 | return queue_depth; |
1258 | } | |
1259 | ||
d9aca22c | 1260 | /* XXX: for spindown warning */ |
da071b42 TH |
1261 | static void ata_delayed_done_timerfn(unsigned long arg) |
1262 | { | |
1263 | struct scsi_cmnd *scmd = (void *)arg; | |
1264 | ||
1265 | scmd->scsi_done(scmd); | |
1266 | } | |
1267 | ||
d9aca22c | 1268 | /* XXX: for spindown warning */ |
da071b42 TH |
1269 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
1270 | { | |
1271 | static struct timer_list timer; | |
1272 | ||
1273 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
1274 | mod_timer(&timer, jiffies + 5 * HZ); | |
1275 | } | |
1276 | ||
972dcafb DG |
1277 | /** |
1278 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1279 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1280 | * |
1281 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1282 | * (to start). Perhaps these commands should be preceded by | |
1283 | * CHECK POWER MODE to see what power mode the device is already in. | |
1284 | * [See SAT revision 5 at www.t10.org] | |
1285 | * | |
1286 | * LOCKING: | |
cca3974e | 1287 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1288 | * |
1289 | * RETURNS: | |
1290 | * Zero on success, non-zero on error. | |
1291 | */ | |
ad706991 | 1292 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1293 | { |
542b1444 | 1294 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1295 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1296 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1297 | |
2e5704f6 TH |
1298 | if (scmd->cmd_len < 5) |
1299 | goto invalid_fld; | |
1300 | ||
972dcafb DG |
1301 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1302 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1303 | if (cdb[1] & 0x1) { |
972dcafb DG |
1304 | ; /* ignore IMMED bit, violates sat-r05 */ |
1305 | } | |
542b1444 | 1306 | if (cdb[4] & 0x2) |
ae006510 | 1307 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1308 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1309 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 | 1310 | |
542b1444 | 1311 | if (cdb[4] & 0x1) { |
972dcafb | 1312 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1313 | |
1314 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1315 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1316 | |
1317 | tf->lbah = 0x0; | |
1318 | tf->lbam = 0x0; | |
1319 | tf->lbal = 0x0; | |
1320 | tf->device |= ATA_LBA; | |
1321 | } else { | |
1322 | /* CHS */ | |
1323 | tf->lbal = 0x1; /* sect */ | |
1324 | tf->lbam = 0x0; /* cyl low */ | |
1325 | tf->lbah = 0x0; /* cyl high */ | |
1326 | } | |
1327 | ||
972dcafb | 1328 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 | 1329 | } else { |
2a6e58d2 RW |
1330 | /* Some odd clown BIOSen issue spindown on power off (ACPI S4 |
1331 | * or S5) causing some drives to spin up and down again. | |
1332 | */ | |
1333 | if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && | |
1334 | system_state == SYSTEM_POWER_OFF) | |
1335 | goto skip; | |
1336 | ||
1337 | if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && | |
1338 | system_entering_hibernation()) | |
1339 | goto skip; | |
1340 | ||
920a4b10 TH |
1341 | /* XXX: This is for backward compatibility, will be |
1342 | * removed. Read Documentation/feature-removal-schedule.txt | |
1343 | * for more info. | |
1344 | */ | |
d9aca22c | 1345 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
1346 | (system_state == SYSTEM_HALT || |
1347 | system_state == SYSTEM_POWER_OFF)) { | |
2dcb407e | 1348 | static unsigned long warned; |
920a4b10 | 1349 | |
da071b42 | 1350 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
1351 | ata_dev_printk(qc->dev, KERN_WARNING, |
1352 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
1353 | "UPDATE SHUTDOWN UTILITY\n"); | |
1354 | ata_dev_printk(qc->dev, KERN_WARNING, | |
1355 | "For more info, visit " | |
1356 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
1357 | |
1358 | /* ->scsi_done is not used, use it for | |
1359 | * delayed completion. | |
1360 | */ | |
1361 | scmd->scsi_done = qc->scsidone; | |
1362 | qc->scsidone = ata_delayed_done; | |
920a4b10 | 1363 | } |
2a6e58d2 | 1364 | goto skip; |
920a4b10 TH |
1365 | } |
1366 | ||
78981a7c RH |
1367 | /* Issue ATA STANDBY IMMEDIATE command */ |
1368 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1369 | } |
78981a7c | 1370 | |
972dcafb DG |
1371 | /* |
1372 | * Standby and Idle condition timers could be implemented but that | |
1373 | * would require libata to implement the Power condition mode page | |
1374 | * and allow the user to change it. Changing mode pages requires | |
1375 | * MODE SELECT to be implemented. | |
1376 | */ | |
1377 | ||
1378 | return 0; | |
ae006510 | 1379 | |
2a6e58d2 | 1380 | invalid_fld: |
542b1444 | 1381 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1382 | /* "Invalid field in cbd" */ |
1383 | return 1; | |
2a6e58d2 RW |
1384 | skip: |
1385 | scmd->result = SAM_STAT_GOOD; | |
1386 | return 1; | |
972dcafb DG |
1387 | } |
1388 | ||
1389 | ||
1da177e4 LT |
1390 | /** |
1391 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1392 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1393 | * |
1394 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1395 | * FLUSH CACHE EXT. | |
1396 | * | |
1397 | * LOCKING: | |
cca3974e | 1398 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1399 | * |
1400 | * RETURNS: | |
1401 | * Zero on success, non-zero on error. | |
1402 | */ | |
ad706991 | 1403 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1404 | { |
1405 | struct ata_taskfile *tf = &qc->tf; | |
1406 | ||
1407 | tf->flags |= ATA_TFLAG_DEVICE; | |
1408 | tf->protocol = ATA_PROT_NODATA; | |
1409 | ||
6fc49adb | 1410 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1411 | tf->command = ATA_CMD_FLUSH_EXT; |
1412 | else | |
1413 | tf->command = ATA_CMD_FLUSH; | |
1414 | ||
b666da35 TH |
1415 | /* flush is critical for IO integrity, consider it an IO command */ |
1416 | qc->flags |= ATA_QCFLAG_IO; | |
1417 | ||
1da177e4 LT |
1418 | return 0; |
1419 | } | |
1420 | ||
3aef5231 AL |
1421 | /** |
1422 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1423 | * @cdb: SCSI command to translate |
3aef5231 AL |
1424 | * |
1425 | * Calculate LBA and transfer length for 6-byte commands. | |
1426 | * | |
1427 | * RETURNS: | |
1428 | * @plba: the LBA | |
1429 | * @plen: the transfer length | |
1430 | */ | |
542b1444 | 1431 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1432 | { |
1433 | u64 lba = 0; | |
6c7b7d2b | 1434 | u32 len; |
3aef5231 AL |
1435 | |
1436 | VPRINTK("six-byte command\n"); | |
1437 | ||
6c7b7d2b | 1438 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1439 | lba |= ((u64)cdb[2]) << 8; |
1440 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1441 | |
6c7b7d2b | 1442 | len = cdb[4]; |
3aef5231 AL |
1443 | |
1444 | *plba = lba; | |
1445 | *plen = len; | |
1446 | } | |
1447 | ||
1448 | /** | |
1449 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1450 | * @cdb: SCSI command to translate |
3aef5231 AL |
1451 | * |
1452 | * Calculate LBA and transfer length for 10-byte commands. | |
1453 | * | |
1454 | * RETURNS: | |
1455 | * @plba: the LBA | |
1456 | * @plen: the transfer length | |
1457 | */ | |
542b1444 | 1458 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1459 | { |
1460 | u64 lba = 0; | |
1461 | u32 len = 0; | |
1462 | ||
1463 | VPRINTK("ten-byte command\n"); | |
1464 | ||
542b1444 TH |
1465 | lba |= ((u64)cdb[2]) << 24; |
1466 | lba |= ((u64)cdb[3]) << 16; | |
1467 | lba |= ((u64)cdb[4]) << 8; | |
1468 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1469 | |
542b1444 TH |
1470 | len |= ((u32)cdb[7]) << 8; |
1471 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1472 | |
1473 | *plba = lba; | |
1474 | *plen = len; | |
1475 | } | |
1476 | ||
1477 | /** | |
1478 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1479 | * @cdb: SCSI command to translate |
3aef5231 AL |
1480 | * |
1481 | * Calculate LBA and transfer length for 16-byte commands. | |
1482 | * | |
1483 | * RETURNS: | |
1484 | * @plba: the LBA | |
1485 | * @plen: the transfer length | |
1486 | */ | |
542b1444 | 1487 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1488 | { |
1489 | u64 lba = 0; | |
1490 | u32 len = 0; | |
1491 | ||
1492 | VPRINTK("sixteen-byte command\n"); | |
1493 | ||
542b1444 TH |
1494 | lba |= ((u64)cdb[2]) << 56; |
1495 | lba |= ((u64)cdb[3]) << 48; | |
1496 | lba |= ((u64)cdb[4]) << 40; | |
1497 | lba |= ((u64)cdb[5]) << 32; | |
1498 | lba |= ((u64)cdb[6]) << 24; | |
1499 | lba |= ((u64)cdb[7]) << 16; | |
1500 | lba |= ((u64)cdb[8]) << 8; | |
1501 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1502 | |
542b1444 TH |
1503 | len |= ((u32)cdb[10]) << 24; |
1504 | len |= ((u32)cdb[11]) << 16; | |
1505 | len |= ((u32)cdb[12]) << 8; | |
1506 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1507 | |
1508 | *plba = lba; | |
1509 | *plen = len; | |
1510 | } | |
1511 | ||
1da177e4 LT |
1512 | /** |
1513 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1514 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1515 | * |
1516 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1517 | * | |
1518 | * LOCKING: | |
cca3974e | 1519 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1520 | * |
1521 | * RETURNS: | |
1522 | * Zero on success, non-zero on error. | |
1523 | */ | |
ad706991 | 1524 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1525 | { |
542b1444 | 1526 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1527 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1528 | struct ata_device *dev = qc->dev; |
1da177e4 | 1529 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1530 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1531 | u64 block; |
1532 | u32 n_block; | |
1da177e4 LT |
1533 | |
1534 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1535 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1536 | |
2e5704f6 TH |
1537 | if (cdb[0] == VERIFY) { |
1538 | if (scmd->cmd_len < 10) | |
1539 | goto invalid_fld; | |
542b1444 | 1540 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1541 | } else if (cdb[0] == VERIFY_16) { |
1542 | if (scmd->cmd_len < 16) | |
1543 | goto invalid_fld; | |
542b1444 | 1544 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1545 | } else |
ae006510 | 1546 | goto invalid_fld; |
1da177e4 | 1547 | |
8bf62ece | 1548 | if (!n_block) |
ae006510 | 1549 | goto nothing_to_do; |
8bf62ece | 1550 | if (block >= dev_sectors) |
ae006510 | 1551 | goto out_of_range; |
8bf62ece | 1552 | if ((block + n_block) > dev_sectors) |
ae006510 | 1553 | goto out_of_range; |
1da177e4 | 1554 | |
07506697 AL |
1555 | if (dev->flags & ATA_DFLAG_LBA) { |
1556 | tf->flags |= ATA_TFLAG_LBA; | |
1557 | ||
c6a33e24 AL |
1558 | if (lba_28_ok(block, n_block)) { |
1559 | /* use LBA28 */ | |
1560 | tf->command = ATA_CMD_VERIFY; | |
1561 | tf->device |= (block >> 24) & 0xf; | |
1562 | } else if (lba_48_ok(block, n_block)) { | |
1563 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1564 | goto out_of_range; | |
07506697 AL |
1565 | |
1566 | /* use LBA48 */ | |
1567 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1568 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1569 | |
8bf62ece | 1570 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1571 | |
8bf62ece AL |
1572 | tf->hob_lbah = (block >> 40) & 0xff; |
1573 | tf->hob_lbam = (block >> 32) & 0xff; | |
1574 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1575 | } else |
1576 | /* request too large even for LBA48 */ | |
1577 | goto out_of_range; | |
8bf62ece AL |
1578 | |
1579 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1580 | |
8bf62ece AL |
1581 | tf->lbah = (block >> 16) & 0xff; |
1582 | tf->lbam = (block >> 8) & 0xff; | |
1583 | tf->lbal = block & 0xff; | |
1da177e4 | 1584 | |
8bf62ece AL |
1585 | tf->device |= ATA_LBA; |
1586 | } else { | |
1587 | /* CHS */ | |
1588 | u32 sect, head, cyl, track; | |
1589 | ||
c6a33e24 AL |
1590 | if (!lba_28_ok(block, n_block)) |
1591 | goto out_of_range; | |
07506697 | 1592 | |
8bf62ece AL |
1593 | /* Convert LBA to CHS */ |
1594 | track = (u32)block / dev->sectors; | |
1595 | cyl = track / dev->heads; | |
1596 | head = track % dev->heads; | |
1597 | sect = (u32)block % dev->sectors + 1; | |
1598 | ||
c187c4b5 AL |
1599 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1600 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1601 | |
1602 | /* Check whether the converted CHS can fit. | |
1603 | Cylinder: 0-65535 | |
8bf62ece AL |
1604 | Head: 0-15 |
1605 | Sector: 1-255*/ | |
2e9edbf8 | 1606 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1607 | goto out_of_range; |
2e9edbf8 | 1608 | |
8bf62ece AL |
1609 | tf->command = ATA_CMD_VERIFY; |
1610 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1611 | tf->lbal = sect; | |
1612 | tf->lbam = cyl; | |
1613 | tf->lbah = cyl >> 8; | |
1614 | tf->device |= head; | |
1615 | } | |
1da177e4 LT |
1616 | |
1617 | return 0; | |
ae006510 DG |
1618 | |
1619 | invalid_fld: | |
542b1444 | 1620 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1621 | /* "Invalid field in cbd" */ |
1622 | return 1; | |
1623 | ||
1624 | out_of_range: | |
542b1444 | 1625 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1626 | /* "Logical Block Address out of range" */ |
1627 | return 1; | |
1628 | ||
1629 | nothing_to_do: | |
542b1444 | 1630 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1631 | return 1; |
1da177e4 LT |
1632 | } |
1633 | ||
1634 | /** | |
1635 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1636 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1637 | * |
1638 | * Converts any of six SCSI read/write commands into the | |
1639 | * ATA counterpart, including starting sector (LBA), | |
1640 | * sector count, and taking into account the device's LBA48 | |
1641 | * support. | |
1642 | * | |
1643 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1644 | * %WRITE_16 are currently supported. | |
1645 | * | |
1646 | * LOCKING: | |
cca3974e | 1647 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1648 | * |
1649 | * RETURNS: | |
1650 | * Zero on success, non-zero on error. | |
1651 | */ | |
ad706991 | 1652 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1653 | { |
542b1444 | 1654 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1655 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1656 | unsigned int tf_flags = 0; |
3aef5231 AL |
1657 | u64 block; |
1658 | u32 n_block; | |
bd056d7e | 1659 | int rc; |
1da177e4 | 1660 | |
542b1444 | 1661 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1662 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1663 | |
9a3dccc4 | 1664 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1665 | switch (cdb[0]) { |
3aef5231 AL |
1666 | case READ_10: |
1667 | case WRITE_10: | |
2e5704f6 TH |
1668 | if (unlikely(scmd->cmd_len < 10)) |
1669 | goto invalid_fld; | |
542b1444 TH |
1670 | scsi_10_lba_len(cdb, &block, &n_block); |
1671 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1672 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1673 | break; |
1674 | case READ_6: | |
1675 | case WRITE_6: | |
2e5704f6 TH |
1676 | if (unlikely(scmd->cmd_len < 6)) |
1677 | goto invalid_fld; | |
542b1444 | 1678 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1679 | |
1680 | /* for 6-byte r/w commands, transfer length 0 | |
1681 | * means 256 blocks of data, not 0 block. | |
1682 | */ | |
76b2bf9b JG |
1683 | if (!n_block) |
1684 | n_block = 256; | |
3aef5231 AL |
1685 | break; |
1686 | case READ_16: | |
1687 | case WRITE_16: | |
2e5704f6 TH |
1688 | if (unlikely(scmd->cmd_len < 16)) |
1689 | goto invalid_fld; | |
542b1444 TH |
1690 | scsi_16_lba_len(cdb, &block, &n_block); |
1691 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1692 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1693 | break; |
1694 | default: | |
8bf62ece | 1695 | DPRINTK("no-byte command\n"); |
ae006510 | 1696 | goto invalid_fld; |
1da177e4 LT |
1697 | } |
1698 | ||
8bf62ece AL |
1699 | /* Check and compose ATA command */ |
1700 | if (!n_block) | |
c187c4b5 AL |
1701 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1702 | * length 0 means transfer 0 block of data. | |
1703 | * However, for ATA R/W commands, sector count 0 means | |
1704 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1705 | * |
1706 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1707 | */ |
ae006510 | 1708 | goto nothing_to_do; |
1da177e4 | 1709 | |
bd056d7e | 1710 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1711 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1712 | |
bd056d7e TH |
1713 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1714 | qc->tag); | |
1715 | if (likely(rc == 0)) | |
1716 | return 0; | |
ae006510 | 1717 | |
bd056d7e TH |
1718 | if (rc == -ERANGE) |
1719 | goto out_of_range; | |
1720 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1721 | invalid_fld: |
542b1444 | 1722 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1723 | /* "Invalid field in cbd" */ |
1724 | return 1; | |
1725 | ||
1726 | out_of_range: | |
542b1444 | 1727 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1728 | /* "Logical Block Address out of range" */ |
1729 | return 1; | |
1730 | ||
1731 | nothing_to_do: | |
542b1444 | 1732 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1733 | return 1; |
1da177e4 LT |
1734 | } |
1735 | ||
77853bf2 | 1736 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1737 | { |
c31f571d | 1738 | struct ata_port *ap = qc->ap; |
1da177e4 | 1739 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1740 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1741 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1742 | |
1743 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1744 | * user mandated it or if there's an error. Note that if we | |
1745 | * generate because the user forced us to, a check condition | |
1746 | * is generated and the ATA register values are returned | |
1747 | * whether the command completed successfully or not. If there | |
1748 | * was no error, SK, ASC and ASCQ will all be zero. | |
1749 | */ | |
a7dac447 | 1750 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1751 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1752 | ata_gen_passthru_sense(qc); |
b095518e JG |
1753 | } else { |
1754 | if (!need_sense) { | |
1755 | cmd->result = SAM_STAT_GOOD; | |
1756 | } else { | |
1757 | /* TODO: decide which descriptor format to use | |
1758 | * for 48b LBA devices and call that here | |
1759 | * instead of the fixed desc, which is only | |
1760 | * good for smaller LBA (and maybe CHS?) | |
1761 | * devices. | |
1762 | */ | |
750426aa | 1763 | ata_gen_ata_sense(qc); |
b095518e JG |
1764 | } |
1765 | } | |
1da177e4 | 1766 | |
d9aca22c | 1767 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1768 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1769 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1770 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1771 | else if (likely(system_state != SYSTEM_HALT && | |
1772 | system_state != SYSTEM_POWER_OFF)) | |
1773 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1774 | ||
c31f571d | 1775 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1776 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1777 | |
1778 | qc->scsidone(cmd); | |
1779 | ||
77853bf2 | 1780 | ata_qc_free(qc); |
1da177e4 LT |
1781 | } |
1782 | ||
1783 | /** | |
1784 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1785 | * @dev: ATA device to which the command is addressed |
1786 | * @cmd: SCSI command to execute | |
1787 | * @done: SCSI command completion function | |
1788 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1789 | * | |
1790 | * Our ->queuecommand() function has decided that the SCSI | |
1791 | * command issued can be directly translated into an ATA | |
1792 | * command, rather than handled internally. | |
1793 | * | |
1794 | * This function sets up an ata_queued_cmd structure for the | |
1795 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1796 | * | |
ae006510 DG |
1797 | * The xlat_func argument (actor) returns 0 if ready to execute |
1798 | * ATA command, else 1 to finish translation. If 1 is returned | |
1799 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1800 | * to be set reflecting an error condition or clean (early) | |
1801 | * termination. | |
1802 | * | |
1da177e4 | 1803 | * LOCKING: |
cca3974e | 1804 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1805 | * |
1806 | * RETURNS: | |
1807 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1808 | * needs to be deferred. | |
1da177e4 | 1809 | */ |
2115ea94 TH |
1810 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1811 | void (*done)(struct scsi_cmnd *), | |
1812 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1813 | { |
31cc23b3 | 1814 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1815 | struct ata_queued_cmd *qc; |
31cc23b3 | 1816 | int rc; |
1da177e4 LT |
1817 | |
1818 | VPRINTK("ENTER\n"); | |
1819 | ||
3373efd8 | 1820 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1821 | if (!qc) |
ae006510 | 1822 | goto err_mem; |
1da177e4 LT |
1823 | |
1824 | /* data is present; dma-map it */ | |
be7db055 | 1825 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1826 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1827 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1828 | ata_dev_printk(dev, KERN_WARNING, |
1829 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1830 | goto err_did; |
1da177e4 LT |
1831 | } |
1832 | ||
7120165c | 1833 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1834 | |
1835 | qc->dma_dir = cmd->sc_data_direction; | |
1836 | } | |
1837 | ||
1838 | qc->complete_fn = ata_scsi_qc_complete; | |
1839 | ||
ad706991 | 1840 | if (xlat_func(qc)) |
ae006510 | 1841 | goto early_finish; |
1da177e4 | 1842 | |
31cc23b3 TH |
1843 | if (ap->ops->qc_defer) { |
1844 | if ((rc = ap->ops->qc_defer(qc))) | |
1845 | goto defer; | |
1846 | } | |
1847 | ||
1da177e4 | 1848 | /* select device, send command to hardware */ |
8e0e694a | 1849 | ata_qc_issue(qc); |
1da177e4 LT |
1850 | |
1851 | VPRINTK("EXIT\n"); | |
2115ea94 | 1852 | return 0; |
1da177e4 | 1853 | |
ae006510 | 1854 | early_finish: |
2dcb407e | 1855 | ata_qc_free(qc); |
da071b42 | 1856 | qc->scsidone(cmd); |
ae006510 | 1857 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1858 | return 0; |
ae006510 DG |
1859 | |
1860 | err_did: | |
1da177e4 | 1861 | ata_qc_free(qc); |
ae006510 | 1862 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1863 | qc->scsidone(cmd); |
253b92ec | 1864 | err_mem: |
ae006510 | 1865 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1866 | return 0; |
3dc1d881 TH |
1867 | |
1868 | defer: | |
31cc23b3 | 1869 | ata_qc_free(qc); |
3dc1d881 | 1870 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1871 | if (rc == ATA_DEFER_LINK) |
1872 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1873 | else | |
1874 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1875 | } |
1876 | ||
1877 | /** | |
1878 | * ata_scsi_rbuf_get - Map response buffer. | |
ec2a20e6 | 1879 | * @cmd: SCSI command containing buffer to be mapped. |
87340e98 TH |
1880 | * @flags: unsigned long variable to store irq enable status |
1881 | * @copy_in: copy in from user buffer | |
1da177e4 | 1882 | * |
87340e98 | 1883 | * Prepare buffer for simulated SCSI commands. |
1da177e4 LT |
1884 | * |
1885 | * LOCKING: | |
87340e98 | 1886 | * spin_lock_irqsave(ata_scsi_rbuf_lock) on success |
1da177e4 LT |
1887 | * |
1888 | * RETURNS: | |
87340e98 | 1889 | * Pointer to response buffer. |
1da177e4 | 1890 | */ |
87340e98 TH |
1891 | static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, |
1892 | unsigned long *flags) | |
1da177e4 | 1893 | { |
87340e98 | 1894 | spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); |
1da177e4 | 1895 | |
87340e98 TH |
1896 | memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); |
1897 | if (copy_in) | |
1898 | sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1899 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1900 | return ata_scsi_rbuf; | |
1da177e4 LT |
1901 | } |
1902 | ||
1903 | /** | |
1904 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1905 | * @cmd: SCSI command containing buffer to be unmapped. | |
87340e98 TH |
1906 | * @copy_out: copy out result |
1907 | * @flags: @flags passed to ata_scsi_rbuf_get() | |
1da177e4 | 1908 | * |
87340e98 TH |
1909 | * Returns rbuf buffer. The result is copied to @cmd's buffer if |
1910 | * @copy_back is true. | |
1da177e4 LT |
1911 | * |
1912 | * LOCKING: | |
87340e98 | 1913 | * Unlocks ata_scsi_rbuf_lock. |
1da177e4 | 1914 | */ |
87340e98 TH |
1915 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, |
1916 | unsigned long *flags) | |
1da177e4 | 1917 | { |
87340e98 TH |
1918 | if (copy_out) |
1919 | sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1920 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1921 | spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); | |
1da177e4 LT |
1922 | } |
1923 | ||
1924 | /** | |
1925 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1926 | * @args: device IDENTIFY data / SCSI command of interest. | |
1927 | * @actor: Callback hook for desired SCSI command simulator | |
1928 | * | |
1929 | * Takes care of the hard work of simulating a SCSI command... | |
1930 | * Mapping the response buffer, calling the command's handler, | |
1931 | * and handling the handler's return value. This return value | |
1932 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1933 | * completed successfully (0), or not (in which case cmd->result |
1934 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1935 | * |
1936 | * LOCKING: | |
cca3974e | 1937 | * spin_lock_irqsave(host lock) |
1da177e4 | 1938 | */ |
f0761be3 | 1939 | static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, |
87340e98 | 1940 | unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) |
1da177e4 LT |
1941 | { |
1942 | u8 *rbuf; | |
87340e98 | 1943 | unsigned int rc; |
1da177e4 | 1944 | struct scsi_cmnd *cmd = args->cmd; |
b445c568 JG |
1945 | unsigned long flags; |
1946 | ||
87340e98 TH |
1947 | rbuf = ata_scsi_rbuf_get(cmd, false, &flags); |
1948 | rc = actor(args, rbuf); | |
1949 | ata_scsi_rbuf_put(cmd, rc == 0, &flags); | |
b445c568 | 1950 | |
ae006510 | 1951 | if (rc == 0) |
1da177e4 | 1952 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1953 | args->done(cmd); |
1da177e4 LT |
1954 | } |
1955 | ||
1956 | /** | |
1957 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1958 | * @args: device IDENTIFY data / SCSI command of interest. | |
1959 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1960 | * |
1961 | * Returns standard device identification data associated | |
b142eb65 | 1962 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1963 | * |
1964 | * LOCKING: | |
cca3974e | 1965 | * spin_lock_irqsave(host lock) |
1da177e4 | 1966 | */ |
87340e98 | 1967 | static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 1968 | { |
87340e98 TH |
1969 | const u8 versions[] = { |
1970 | 0x60, /* SAM-3 (no version claimed) */ | |
1971 | ||
1972 | 0x03, | |
1973 | 0x20, /* SBC-2 (no version claimed) */ | |
1974 | ||
1975 | 0x02, | |
1976 | 0x60 /* SPC-3 (no version claimed) */ | |
1977 | }; | |
1da177e4 LT |
1978 | u8 hdr[] = { |
1979 | TYPE_DISK, | |
1980 | 0, | |
1981 | 0x5, /* claim SPC-3 version compatibility */ | |
1982 | 2, | |
1983 | 95 - 4 | |
1984 | }; | |
1985 | ||
87340e98 TH |
1986 | VPRINTK("ENTER\n"); |
1987 | ||
1da177e4 LT |
1988 | /* set scsi removeable (RMB) bit per ata bit */ |
1989 | if (ata_id_removeable(args->id)) | |
1990 | hdr[1] |= (1 << 7); | |
1991 | ||
1da177e4 | 1992 | memcpy(rbuf, hdr, sizeof(hdr)); |
87340e98 TH |
1993 | memcpy(&rbuf[8], "ATA ", 8); |
1994 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); | |
1995 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 | 1996 | |
87340e98 TH |
1997 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1998 | memcpy(&rbuf[32], "n/a ", 4); | |
1da177e4 | 1999 | |
87340e98 | 2000 | memcpy(rbuf + 59, versions, sizeof(versions)); |
1da177e4 LT |
2001 | |
2002 | return 0; | |
2003 | } | |
2004 | ||
2005 | /** | |
b142eb65 | 2006 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
2007 | * @args: device IDENTIFY data / SCSI command of interest. |
2008 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2009 | * |
b142eb65 | 2010 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
2011 | * |
2012 | * LOCKING: | |
cca3974e | 2013 | * spin_lock_irqsave(host lock) |
1da177e4 | 2014 | */ |
87340e98 | 2015 | static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2016 | { |
2017 | const u8 pages[] = { | |
2018 | 0x00, /* page 0x00, this page */ | |
2019 | 0x80, /* page 0x80, unit serial no page */ | |
1e9dbc92 MW |
2020 | 0x83, /* page 0x83, device ident page */ |
2021 | 0x89, /* page 0x89, ata info page */ | |
2022 | 0xb1, /* page 0xb1, block device characteristics page */ | |
1da177e4 | 2023 | }; |
1da177e4 | 2024 | |
87340e98 TH |
2025 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
2026 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1da177e4 LT |
2027 | return 0; |
2028 | } | |
2029 | ||
2030 | /** | |
b142eb65 | 2031 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
2032 | * @args: device IDENTIFY data / SCSI command of interest. |
2033 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2034 | * |
2035 | * Returns ATA device serial number. | |
2036 | * | |
2037 | * LOCKING: | |
cca3974e | 2038 | * spin_lock_irqsave(host lock) |
1da177e4 | 2039 | */ |
87340e98 | 2040 | static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2041 | { |
2042 | const u8 hdr[] = { | |
2043 | 0, | |
2044 | 0x80, /* this page code */ | |
2045 | 0, | |
a0cf733b | 2046 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 | 2047 | }; |
1da177e4 | 2048 | |
87340e98 TH |
2049 | memcpy(rbuf, hdr, sizeof(hdr)); |
2050 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
2051 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1da177e4 LT |
2052 | return 0; |
2053 | } | |
2054 | ||
1da177e4 | 2055 | /** |
b142eb65 | 2056 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
2057 | * @args: device IDENTIFY data / SCSI command of interest. |
2058 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2059 | * |
b142eb65 JG |
2060 | * Yields two logical unit device identification designators: |
2061 | * - vendor specific ASCII containing the ATA serial number | |
2062 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
2063 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
2064 | * |
2065 | * LOCKING: | |
cca3974e | 2066 | * spin_lock_irqsave(host lock) |
1da177e4 | 2067 | */ |
87340e98 | 2068 | static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2069 | { |
b142eb65 | 2070 | const int sat_model_serial_desc_len = 68; |
87340e98 | 2071 | int num; |
1da177e4 | 2072 | |
b142eb65 JG |
2073 | rbuf[1] = 0x83; /* this page code */ |
2074 | num = 4; | |
2075 | ||
87340e98 TH |
2076 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2077 | rbuf[num + 0] = 2; | |
2078 | rbuf[num + 3] = ATA_ID_SERNO_LEN; | |
2079 | num += 4; | |
2080 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
2081 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
2082 | num += ATA_ID_SERNO_LEN; | |
2083 | ||
2084 | /* SAT defined lu model and serial numbers descriptor */ | |
2085 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2086 | rbuf[num + 0] = 2; | |
2087 | rbuf[num + 1] = 1; | |
2088 | rbuf[num + 3] = sat_model_serial_desc_len; | |
2089 | num += 4; | |
2090 | memcpy(rbuf + num, "ATA ", 8); | |
2091 | num += 8; | |
2092 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, | |
2093 | ATA_ID_PROD_LEN); | |
2094 | num += ATA_ID_PROD_LEN; | |
2095 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, | |
2096 | ATA_ID_SERNO_LEN); | |
2097 | num += ATA_ID_SERNO_LEN; | |
2098 | ||
b142eb65 | 2099 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ |
1da177e4 LT |
2100 | return 0; |
2101 | } | |
2102 | ||
ad355b46 JG |
2103 | /** |
2104 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
2105 | * @args: device IDENTIFY data / SCSI command of interest. | |
2106 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
ad355b46 JG |
2107 | * |
2108 | * Yields SAT-specified ATA VPD page. | |
2109 | * | |
2110 | * LOCKING: | |
2111 | * spin_lock_irqsave(host lock) | |
2112 | */ | |
87340e98 | 2113 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) |
ad355b46 | 2114 | { |
ad355b46 | 2115 | struct ata_taskfile tf; |
ad355b46 | 2116 | |
ad355b46 JG |
2117 | memset(&tf, 0, sizeof(tf)); |
2118 | ||
87340e98 TH |
2119 | rbuf[1] = 0x89; /* our page code */ |
2120 | rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
2121 | rbuf[3] = (0x238 & 0xff); | |
ad355b46 | 2122 | |
87340e98 TH |
2123 | memcpy(&rbuf[8], "linux ", 8); |
2124 | memcpy(&rbuf[16], "libata ", 16); | |
2125 | memcpy(&rbuf[32], DRV_VERSION, 4); | |
2126 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
ad355b46 JG |
2127 | |
2128 | /* we don't store the ATA device signature, so we fake it */ | |
2129 | ||
2130 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
2131 | tf.lbal = 0x1; | |
2132 | tf.nsect = 0x1; | |
2133 | ||
87340e98 TH |
2134 | ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ |
2135 | rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
ad355b46 | 2136 | |
87340e98 | 2137 | rbuf[56] = ATA_CMD_ID_ATA; |
ad355b46 | 2138 | |
87340e98 | 2139 | memcpy(&rbuf[60], &args->id[0], 512); |
ad355b46 JG |
2140 | return 0; |
2141 | } | |
2142 | ||
1e9dbc92 MW |
2143 | static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) |
2144 | { | |
4bca3286 MP |
2145 | int form_factor = ata_id_form_factor(args->id); |
2146 | int media_rotation_rate = ata_id_rotation_rate(args->id); | |
2147 | ||
1e9dbc92 MW |
2148 | rbuf[1] = 0xb1; |
2149 | rbuf[3] = 0x3c; | |
4bca3286 MP |
2150 | rbuf[4] = media_rotation_rate >> 8; |
2151 | rbuf[5] = media_rotation_rate; | |
2152 | rbuf[7] = form_factor; | |
1e9dbc92 MW |
2153 | |
2154 | return 0; | |
2155 | } | |
2156 | ||
1da177e4 | 2157 | /** |
0cba632b | 2158 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
2159 | * @args: device IDENTIFY data / SCSI command of interest. |
2160 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2161 | * |
2162 | * No operation. Simply returns success to caller, to indicate | |
2163 | * that the caller should successfully complete this SCSI command. | |
2164 | * | |
2165 | * LOCKING: | |
cca3974e | 2166 | * spin_lock_irqsave(host lock) |
1da177e4 | 2167 | */ |
87340e98 | 2168 | static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2169 | { |
2170 | VPRINTK("ENTER\n"); | |
2171 | return 0; | |
2172 | } | |
2173 | ||
1da177e4 LT |
2174 | /** |
2175 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2176 | * @id: device IDENTIFY data | |
87340e98 | 2177 | * @buf: output buffer |
1da177e4 LT |
2178 | * |
2179 | * Generate a caching info page, which conditionally indicates | |
2180 | * write caching to the SCSI layer, depending on device | |
2181 | * capabilities. | |
2182 | * | |
2183 | * LOCKING: | |
2184 | * None. | |
2185 | */ | |
87340e98 | 2186 | static unsigned int ata_msense_caching(u16 *id, u8 *buf) |
1da177e4 | 2187 | { |
87340e98 | 2188 | memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); |
1da177e4 | 2189 | if (ata_id_wcache_enabled(id)) |
87340e98 | 2190 | buf[2] |= (1 << 2); /* write cache enable */ |
1da177e4 | 2191 | if (!ata_id_rahead_enabled(id)) |
87340e98 TH |
2192 | buf[12] |= (1 << 5); /* disable read ahead */ |
2193 | return sizeof(def_cache_mpage); | |
1da177e4 LT |
2194 | } |
2195 | ||
2196 | /** | |
2197 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
87340e98 | 2198 | * @buf: output buffer |
1da177e4 LT |
2199 | * |
2200 | * Generate a generic MODE SENSE control mode page. | |
2201 | * | |
2202 | * LOCKING: | |
2203 | * None. | |
2204 | */ | |
87340e98 | 2205 | static unsigned int ata_msense_ctl_mode(u8 *buf) |
1da177e4 | 2206 | { |
87340e98 | 2207 | memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); |
00ac37f5 | 2208 | return sizeof(def_control_mpage); |
1da177e4 LT |
2209 | } |
2210 | ||
2211 | /** | |
2212 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
ec2a20e6 | 2213 | * @buf: output buffer |
1da177e4 LT |
2214 | * |
2215 | * Generate a generic MODE SENSE r/w error recovery page. | |
2216 | * | |
2217 | * LOCKING: | |
2218 | * None. | |
2219 | */ | |
87340e98 | 2220 | static unsigned int ata_msense_rw_recovery(u8 *buf) |
1da177e4 | 2221 | { |
87340e98 | 2222 | memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); |
00ac37f5 | 2223 | return sizeof(def_rw_recovery_mpage); |
1da177e4 LT |
2224 | } |
2225 | ||
48bdc8ec JA |
2226 | /* |
2227 | * We can turn this into a real blacklist if it's needed, for now just | |
2228 | * blacklist any Maxtor BANC1G10 revision firmware | |
2229 | */ | |
2230 | static int ata_dev_supports_fua(u16 *id) | |
2231 | { | |
a0cf733b | 2232 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2233 | |
c3c013a2 JG |
2234 | if (!libata_fua) |
2235 | return 0; | |
48bdc8ec JA |
2236 | if (!ata_id_has_fua(id)) |
2237 | return 0; | |
2238 | ||
a0cf733b TH |
2239 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2240 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2241 | |
2e02671d | 2242 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2243 | return 1; |
2e02671d | 2244 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2245 | return 1; |
2246 | ||
2247 | return 0; /* blacklisted */ | |
2248 | } | |
2249 | ||
1da177e4 LT |
2250 | /** |
2251 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2252 | * @args: device IDENTIFY data / SCSI command of interest. | |
2253 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2254 | * |
00ac37f5 DG |
2255 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2256 | * access devices (e.g. disks) only. There should be no block | |
2257 | * descriptor for other device types. | |
1da177e4 LT |
2258 | * |
2259 | * LOCKING: | |
cca3974e | 2260 | * spin_lock_irqsave(host lock) |
1da177e4 | 2261 | */ |
87340e98 | 2262 | static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2263 | { |
9a3dccc4 | 2264 | struct ata_device *dev = args->dev; |
87340e98 | 2265 | u8 *scsicmd = args->cmd->cmnd, *p = rbuf; |
00ac37f5 DG |
2266 | const u8 sat_blk_desc[] = { |
2267 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2268 | 0, | |
2269 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2270 | }; | |
2271 | u8 pg, spg; | |
87340e98 | 2272 | unsigned int ebd, page_control, six_byte; |
9a3dccc4 | 2273 | u8 dpofua; |
1da177e4 LT |
2274 | |
2275 | VPRINTK("ENTER\n"); | |
2276 | ||
2277 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2278 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2279 | /* | |
2280 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2281 | */ |
00ac37f5 | 2282 | |
1da177e4 | 2283 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2284 | switch (page_control) { |
2285 | case 0: /* current */ | |
2286 | break; /* supported */ | |
2287 | case 3: /* saved */ | |
2288 | goto saving_not_supp; | |
2289 | case 1: /* changeable */ | |
2290 | case 2: /* defaults */ | |
2291 | default: | |
2292 | goto invalid_fld; | |
2293 | } | |
1da177e4 | 2294 | |
87340e98 TH |
2295 | if (six_byte) |
2296 | p += 4 + (ebd ? 8 : 0); | |
2297 | else | |
2298 | p += 8 + (ebd ? 8 : 0); | |
1da177e4 | 2299 | |
00ac37f5 DG |
2300 | pg = scsicmd[2] & 0x3f; |
2301 | spg = scsicmd[3]; | |
2302 | /* | |
2303 | * No mode subpages supported (yet) but asking for _all_ | |
2304 | * subpages may be valid | |
2305 | */ | |
2306 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2307 | goto invalid_fld; | |
2308 | ||
2309 | switch(pg) { | |
2310 | case RW_RECOVERY_MPAGE: | |
87340e98 | 2311 | p += ata_msense_rw_recovery(p); |
1da177e4 LT |
2312 | break; |
2313 | ||
00ac37f5 | 2314 | case CACHE_MPAGE: |
87340e98 | 2315 | p += ata_msense_caching(args->id, p); |
1da177e4 LT |
2316 | break; |
2317 | ||
87340e98 TH |
2318 | case CONTROL_MPAGE: |
2319 | p += ata_msense_ctl_mode(p); | |
1da177e4 | 2320 | break; |
1da177e4 | 2321 | |
00ac37f5 | 2322 | case ALL_MPAGES: |
87340e98 TH |
2323 | p += ata_msense_rw_recovery(p); |
2324 | p += ata_msense_caching(args->id, p); | |
2325 | p += ata_msense_ctl_mode(p); | |
1da177e4 LT |
2326 | break; |
2327 | ||
2328 | default: /* invalid page code */ | |
ae006510 | 2329 | goto invalid_fld; |
1da177e4 LT |
2330 | } |
2331 | ||
9a3dccc4 | 2332 | dpofua = 0; |
f79d409f | 2333 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2334 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2335 | dpofua = 1 << 4; | |
2336 | ||
1da177e4 | 2337 | if (six_byte) { |
87340e98 TH |
2338 | rbuf[0] = p - rbuf - 1; |
2339 | rbuf[2] |= dpofua; | |
00ac37f5 | 2340 | if (ebd) { |
87340e98 TH |
2341 | rbuf[3] = sizeof(sat_blk_desc); |
2342 | memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2343 | } |
1da177e4 | 2344 | } else { |
87340e98 TH |
2345 | unsigned int output_len = p - rbuf - 2; |
2346 | ||
1da177e4 | 2347 | rbuf[0] = output_len >> 8; |
87340e98 TH |
2348 | rbuf[1] = output_len; |
2349 | rbuf[3] |= dpofua; | |
00ac37f5 | 2350 | if (ebd) { |
87340e98 TH |
2351 | rbuf[7] = sizeof(sat_blk_desc); |
2352 | memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2353 | } |
1da177e4 | 2354 | } |
1da177e4 | 2355 | return 0; |
ae006510 DG |
2356 | |
2357 | invalid_fld: | |
2358 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2359 | /* "Invalid field in cbd" */ | |
2360 | return 1; | |
2361 | ||
2362 | saving_not_supp: | |
2363 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2364 | /* "Saving parameters not supported" */ | |
2365 | return 1; | |
1da177e4 LT |
2366 | } |
2367 | ||
2368 | /** | |
2369 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2370 | * @args: device IDENTIFY data / SCSI command of interest. | |
2371 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2372 | * |
2373 | * Simulate READ CAPACITY commands. | |
2374 | * | |
2375 | * LOCKING: | |
6a36261e | 2376 | * None. |
1da177e4 | 2377 | */ |
87340e98 | 2378 | static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2379 | { |
61d79a8e MP |
2380 | struct ata_device *dev = args->dev; |
2381 | u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ | |
2382 | u8 log_per_phys = 0; | |
2383 | u16 lowest_aligned = 0; | |
2384 | u16 word_106 = dev->id[106]; | |
2385 | u16 word_209 = dev->id[209]; | |
2386 | ||
2387 | if ((word_106 & 0xc000) == 0x4000) { | |
2388 | /* Number and offset of logical sectors per physical sector */ | |
2389 | if (word_106 & (1 << 13)) | |
2390 | log_per_phys = word_106 & 0xf; | |
2391 | if ((word_209 & 0xc000) == 0x4000) { | |
2392 | u16 first = dev->id[209] & 0x3fff; | |
2393 | if (first > 0) | |
2394 | lowest_aligned = (1 << log_per_phys) - first; | |
2395 | } | |
2396 | } | |
1da177e4 LT |
2397 | |
2398 | VPRINTK("ENTER\n"); | |
2399 | ||
1da177e4 | 2400 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2401 | if (last_lba >= 0xffffffffULL) |
2402 | last_lba = 0xffffffff; | |
0c144d0d | 2403 | |
1da177e4 | 2404 | /* sector count, 32-bit */ |
87340e98 TH |
2405 | rbuf[0] = last_lba >> (8 * 3); |
2406 | rbuf[1] = last_lba >> (8 * 2); | |
2407 | rbuf[2] = last_lba >> (8 * 1); | |
2408 | rbuf[3] = last_lba; | |
1da177e4 LT |
2409 | |
2410 | /* sector size */ | |
87340e98 TH |
2411 | rbuf[6] = ATA_SECT_SIZE >> 8; |
2412 | rbuf[7] = ATA_SECT_SIZE & 0xff; | |
1da177e4 LT |
2413 | } else { |
2414 | /* sector count, 64-bit */ | |
87340e98 TH |
2415 | rbuf[0] = last_lba >> (8 * 7); |
2416 | rbuf[1] = last_lba >> (8 * 6); | |
2417 | rbuf[2] = last_lba >> (8 * 5); | |
2418 | rbuf[3] = last_lba >> (8 * 4); | |
2419 | rbuf[4] = last_lba >> (8 * 3); | |
2420 | rbuf[5] = last_lba >> (8 * 2); | |
2421 | rbuf[6] = last_lba >> (8 * 1); | |
2422 | rbuf[7] = last_lba; | |
1da177e4 LT |
2423 | |
2424 | /* sector size */ | |
87340e98 TH |
2425 | rbuf[10] = ATA_SECT_SIZE >> 8; |
2426 | rbuf[11] = ATA_SECT_SIZE & 0xff; | |
61d79a8e MP |
2427 | |
2428 | rbuf[12] = 0; | |
2429 | rbuf[13] = log_per_phys; | |
2430 | rbuf[14] = (lowest_aligned >> 8) & 0x3f; | |
2431 | rbuf[15] = lowest_aligned; | |
1da177e4 LT |
2432 | } |
2433 | ||
2434 | return 0; | |
2435 | } | |
2436 | ||
2437 | /** | |
2438 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2439 | * @args: device IDENTIFY data / SCSI command of interest. | |
2440 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2441 | * |
2442 | * Simulate REPORT LUNS command. | |
2443 | * | |
2444 | * LOCKING: | |
cca3974e | 2445 | * spin_lock_irqsave(host lock) |
1da177e4 | 2446 | */ |
87340e98 | 2447 | static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2448 | { |
2449 | VPRINTK("ENTER\n"); | |
2450 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2451 | ||
2452 | return 0; | |
2453 | } | |
2454 | ||
77853bf2 | 2455 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2456 | { |
74e6c8c3 | 2457 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2458 | /* FIXME: not quite right; we don't want the |
2459 | * translation of taskfile registers into | |
2460 | * a sense descriptors, since that's only | |
2461 | * correct for ATA, not ATAPI | |
2462 | */ | |
750426aa | 2463 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2464 | } |
a939c963 | 2465 | |
c6e6e666 | 2466 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2467 | ata_qc_free(qc); |
c6e6e666 | 2468 | } |
a939c963 | 2469 | |
c6e6e666 JG |
2470 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2471 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2472 | { | |
2473 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2474 | } | |
2475 | ||
2476 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2477 | { | |
2478 | struct ata_port *ap = qc->ap; | |
2479 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2480 | ||
2481 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2482 | |
2483 | /* FIXME: is this needed? */ | |
7ccd720d | 2484 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2485 | |
127102ae | 2486 | #ifdef CONFIG_ATA_SFF |
855d854a JB |
2487 | if (ap->ops->sff_tf_read) |
2488 | ap->ops->sff_tf_read(ap, &qc->tf); | |
127102ae | 2489 | #endif |
c6e6e666 JG |
2490 | |
2491 | /* fill these in, for the case where they are -not- overwritten */ | |
2492 | cmd->sense_buffer[0] = 0x70; | |
2493 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2494 | ||
2495 | ata_qc_reinit(qc); | |
2496 | ||
93f8fecb | 2497 | /* setup sg table and init transfer direction */ |
cadb7345 | 2498 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2499 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2500 | qc->dma_dir = DMA_FROM_DEVICE; |
2501 | ||
6e7846e9 | 2502 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2503 | qc->cdb[0] = REQUEST_SENSE; |
2504 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2505 | ||
2506 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2507 | qc->tf.command = ATA_CMD_PACKET; | |
2508 | ||
c6e6e666 | 2509 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2510 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2511 | qc->tf.feature |= ATAPI_PKT_DMA; |
2512 | } else { | |
0dc36888 | 2513 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2514 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2515 | qc->tf.lbah = 0; | |
c6e6e666 | 2516 | } |
a939c963 JG |
2517 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2518 | ||
c6e6e666 | 2519 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2520 | |
8e0e694a | 2521 | ata_qc_issue(qc); |
a939c963 JG |
2522 | |
2523 | DPRINTK("EXIT\n"); | |
2524 | } | |
2525 | ||
77853bf2 | 2526 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2527 | { |
2528 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2529 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2530 | |
a7dac447 | 2531 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2532 | |
246619da TH |
2533 | /* handle completion from new EH */ |
2534 | if (unlikely(qc->ap->ops->error_handler && | |
2535 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2536 | ||
2537 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2538 | /* FIXME: not quite right; we don't want the | |
2539 | * translation of taskfile registers into a | |
2540 | * sense descriptors, since that's only | |
2541 | * correct for ATA, not ATAPI | |
2542 | */ | |
750426aa | 2543 | ata_gen_passthru_sense(qc); |
246619da TH |
2544 | } |
2545 | ||
22aac089 TH |
2546 | /* SCSI EH automatically locks door if sdev->locked is |
2547 | * set. Sometimes door lock request continues to | |
2548 | * fail, for example, when no media is present. This | |
2549 | * creates a loop - SCSI EH issues door lock which | |
2550 | * fails and gets invoked again to acquire sense data | |
2551 | * for the failed command. | |
2552 | * | |
2553 | * If door lock fails, always clear sdev->locked to | |
2554 | * avoid this infinite loop. | |
2555 | */ | |
2556 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2557 | qc->dev->sdev->locked = 0; | |
2558 | ||
246619da TH |
2559 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2560 | qc->scsidone(cmd); | |
2561 | ata_qc_free(qc); | |
2562 | return; | |
2563 | } | |
2564 | ||
2565 | /* successful completion or old EH failure path */ | |
a7dac447 | 2566 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2567 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2568 | atapi_request_sense(qc); |
77853bf2 | 2569 | return; |
74e6c8c3 | 2570 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2571 | /* FIXME: not quite right; we don't want the |
2572 | * translation of taskfile registers into | |
2573 | * a sense descriptors, since that's only | |
2574 | * correct for ATA, not ATAPI | |
2575 | */ | |
750426aa | 2576 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2577 | } else { |
1da177e4 LT |
2578 | u8 *scsicmd = cmd->cmnd; |
2579 | ||
fd71da46 | 2580 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
b445c568 | 2581 | unsigned long flags; |
87340e98 | 2582 | u8 *buf; |
b445c568 | 2583 | |
87340e98 | 2584 | buf = ata_scsi_rbuf_get(cmd, true, &flags); |
a15dbeb4 JG |
2585 | |
2586 | /* ATAPI devices typically report zero for their SCSI version, | |
2587 | * and sometimes deviate from the spec WRT response data | |
2588 | * format. If SCSI version is reported as zero like normal, | |
2589 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2590 | * to indicate to the Linux scsi midlayer this is a modern | |
2591 | * device. 2) Ensure response data format / ATAPI information | |
2592 | * are always correct. | |
a15dbeb4 JG |
2593 | */ |
2594 | if (buf[2] == 0) { | |
2595 | buf[2] = 0x5; | |
2596 | buf[3] = 0x32; | |
2597 | } | |
2598 | ||
87340e98 | 2599 | ata_scsi_rbuf_put(cmd, true, &flags); |
1da177e4 | 2600 | } |
a15dbeb4 | 2601 | |
1da177e4 LT |
2602 | cmd->result = SAM_STAT_GOOD; |
2603 | } | |
2604 | ||
2605 | qc->scsidone(cmd); | |
77853bf2 | 2606 | ata_qc_free(qc); |
1da177e4 LT |
2607 | } |
2608 | /** | |
2609 | * atapi_xlat - Initialize PACKET taskfile | |
2610 | * @qc: command structure to be initialized | |
1da177e4 LT |
2611 | * |
2612 | * LOCKING: | |
cca3974e | 2613 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2614 | * |
2615 | * RETURNS: | |
2616 | * Zero on success, non-zero on failure. | |
2617 | */ | |
ad706991 | 2618 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2619 | { |
542b1444 | 2620 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 2621 | struct ata_device *dev = qc->dev; |
542b1444 | 2622 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
5895ef9a | 2623 | int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); |
2db78dd3 | 2624 | unsigned int nbytes; |
1da177e4 | 2625 | |
2e5704f6 TH |
2626 | memset(qc->cdb, 0, dev->cdb_len); |
2627 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2628 | |
2629 | qc->complete_fn = atapi_qc_complete; | |
2630 | ||
2631 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2632 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2633 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2634 | DPRINTK("direction: write\n"); | |
2635 | } | |
2636 | ||
2637 | qc->tf.command = ATA_CMD_PACKET; | |
aacda375 | 2638 | ata_qc_set_pc_nbytes(qc); |
e00f1ff3 TH |
2639 | |
2640 | /* check whether ATAPI DMA is safe */ | |
5895ef9a | 2641 | if (!nodata && !using_pio && atapi_check_dma(qc)) |
e00f1ff3 | 2642 | using_pio = 1; |
1da177e4 | 2643 | |
e190222d TH |
2644 | /* Some controller variants snoop this value for Packet |
2645 | * transfers to do state machine and FIFO management. Thus we | |
2646 | * want to set it properly, and for DMA where it is | |
2647 | * effectively meaningless. | |
2648 | */ | |
aacda375 | 2649 | nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); |
2db78dd3 | 2650 | |
e190222d TH |
2651 | /* Most ATAPI devices which honor transfer chunk size don't |
2652 | * behave according to the spec when odd chunk size which | |
2653 | * matches the transfer length is specified. If the number of | |
2654 | * bytes to transfer is 2n+1. According to the spec, what | |
2655 | * should happen is to indicate that 2n+1 is going to be | |
2656 | * transferred and transfer 2n+2 bytes where the last byte is | |
2657 | * padding. | |
2658 | * | |
2659 | * In practice, this doesn't happen. ATAPI devices first | |
2660 | * indicate and transfer 2n bytes and then indicate and | |
2661 | * transfer 2 bytes where the last byte is padding. | |
2662 | * | |
2663 | * This inconsistency confuses several controllers which | |
2664 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2665 | * These controllers use actual number of transferred bytes to | |
2666 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2667 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2668 | * FISes are aligned to 4 bytes. This causes data corruption | |
2669 | * and buffer overrun. | |
2670 | * | |
2671 | * Always setting nbytes to even number solves this problem | |
2672 | * because then ATAPI devices don't have to split data at 2n | |
2673 | * boundaries. | |
2674 | */ | |
2675 | if (nbytes & 0x1) | |
2676 | nbytes++; | |
2677 | ||
2db78dd3 AC |
2678 | qc->tf.lbam = (nbytes & 0xFF); |
2679 | qc->tf.lbah = (nbytes >> 8); | |
2680 | ||
5895ef9a TH |
2681 | if (nodata) |
2682 | qc->tf.protocol = ATAPI_PROT_NODATA; | |
2683 | else if (using_pio) | |
2684 | qc->tf.protocol = ATAPI_PROT_PIO; | |
2685 | else { | |
e00f1ff3 | 2686 | /* DMA data xfer */ |
0dc36888 | 2687 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2688 | qc->tf.feature |= ATAPI_PKT_DMA; |
2689 | ||
91163006 TH |
2690 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2691 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2692 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2693 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2694 | } |
2695 | ||
2db78dd3 AC |
2696 | |
2697 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2698 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2699 | return 0; |
2700 | } | |
2701 | ||
2dcb407e | 2702 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2703 | { |
071f44b1 | 2704 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2705 | if (likely(devno < ata_link_max_devices(&ap->link))) |
2706 | return &ap->link.device[devno]; | |
2707 | } else { | |
2708 | if (likely(devno < ap->nr_pmp_links)) | |
2709 | return &ap->pmp_link[devno].device[0]; | |
2710 | } | |
2711 | ||
ab5b3a5b TH |
2712 | return NULL; |
2713 | } | |
2714 | ||
2dcb407e JG |
2715 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2716 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2717 | { |
41bda9c9 TH |
2718 | int devno; |
2719 | ||
ab5b3a5b | 2720 | /* skip commands not addressed to targets we simulate */ |
071f44b1 | 2721 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2722 | if (unlikely(scsidev->channel || scsidev->lun)) |
2723 | return NULL; | |
2724 | devno = scsidev->id; | |
2725 | } else { | |
2726 | if (unlikely(scsidev->id || scsidev->lun)) | |
2727 | return NULL; | |
2728 | devno = scsidev->channel; | |
2729 | } | |
ab5b3a5b | 2730 | |
41bda9c9 | 2731 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2732 | } |
2733 | ||
1da177e4 LT |
2734 | /** |
2735 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2736 | * @ap: ATA port to which the device is attached | |
2737 | * @scsidev: SCSI device from which we derive the ATA device | |
2738 | * | |
2739 | * Given various information provided in struct scsi_cmnd, | |
2740 | * map that onto an ATA bus, and using that mapping | |
2741 | * determine which ata_device is associated with the | |
2742 | * SCSI command to be sent. | |
2743 | * | |
2744 | * LOCKING: | |
cca3974e | 2745 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2746 | * |
2747 | * RETURNS: | |
2748 | * Associated ATA device, or %NULL if not found. | |
2749 | */ | |
1da177e4 | 2750 | static struct ata_device * |
057ace5e | 2751 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2752 | { |
ab5b3a5b | 2753 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2754 | |
2486fa56 | 2755 | if (unlikely(!dev || !ata_dev_enabled(dev))) |
1da177e4 LT |
2756 | return NULL; |
2757 | ||
1da177e4 LT |
2758 | return dev; |
2759 | } | |
2760 | ||
b095518e JG |
2761 | /* |
2762 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2763 | * @byte1: Byte 1 from pass-thru CDB. | |
2764 | * | |
2765 | * RETURNS: | |
2766 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2767 | */ | |
2768 | static u8 | |
2769 | ata_scsi_map_proto(u8 byte1) | |
2770 | { | |
2771 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2772 | case 3: /* Non-data */ |
2773 | return ATA_PROT_NODATA; | |
2774 | ||
2775 | case 6: /* DMA */ | |
2776 | case 10: /* UDMA Data-in */ | |
2777 | case 11: /* UDMA Data-Out */ | |
2778 | return ATA_PROT_DMA; | |
2779 | ||
2780 | case 4: /* PIO Data-in */ | |
2781 | case 5: /* PIO Data-out */ | |
2782 | return ATA_PROT_PIO; | |
2783 | ||
2784 | case 0: /* Hard Reset */ | |
2785 | case 1: /* SRST */ | |
2786 | case 8: /* Device Diagnostic */ | |
2787 | case 9: /* Device Reset */ | |
2788 | case 7: /* DMA Queued */ | |
2789 | case 12: /* FPDMA */ | |
2790 | case 15: /* Return Response Info */ | |
2791 | default: /* Reserved */ | |
2792 | break; | |
b095518e JG |
2793 | } |
2794 | ||
2795 | return ATA_PROT_UNKNOWN; | |
2796 | } | |
2797 | ||
2798 | /** | |
2799 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2800 | * @qc: command structure to be initialized | |
b095518e JG |
2801 | * |
2802 | * Handles either 12 or 16-byte versions of the CDB. | |
2803 | * | |
2804 | * RETURNS: | |
2805 | * Zero on success, non-zero on failure. | |
2806 | */ | |
ad706991 | 2807 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2808 | { |
2809 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2810 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2811 | struct ata_device *dev = qc->dev; |
ad706991 | 2812 | const u8 *cdb = scmd->cmnd; |
b095518e | 2813 | |
542b1444 | 2814 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2815 | goto invalid_fld; |
8190bdb9 | 2816 | |
ae8d4ee7 AC |
2817 | /* |
2818 | * Filter TPM commands by default. These provide an | |
2819 | * essentially uncontrolled encrypted "back door" between | |
2820 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2821 | * have a real reason for wanting to use them. This ensures | |
2822 | * that installed software cannot easily mess stuff up without | |
2823 | * user intent. DVR type users will probably ship with this enabled | |
2824 | * for movie content management. | |
2825 | * | |
2826 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock | |
2827 | * for this and should do in future but that it is not sufficient as | |
2828 | * DCS is an optional feature set. Thus we also do the software filter | |
2829 | * so that we comply with the TC consortium stated goal that the user | |
2830 | * can turn off TC features of their system. | |
2831 | */ | |
2832 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) | |
2833 | goto invalid_fld; | |
2834 | ||
f79d409f AC |
2835 | /* We may not issue DMA commands if no DMA mode is set */ |
2836 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2837 | goto invalid_fld; | |
b095518e JG |
2838 | |
2839 | /* | |
2840 | * 12 and 16 byte CDBs use different offsets to | |
2841 | * provide the various register values. | |
2842 | */ | |
542b1444 | 2843 | if (cdb[0] == ATA_16) { |
b095518e JG |
2844 | /* |
2845 | * 16-byte CDB - may contain extended commands. | |
2846 | * | |
2847 | * If that is the case, copy the upper byte register values. | |
2848 | */ | |
542b1444 TH |
2849 | if (cdb[1] & 0x01) { |
2850 | tf->hob_feature = cdb[3]; | |
2851 | tf->hob_nsect = cdb[5]; | |
2852 | tf->hob_lbal = cdb[7]; | |
2853 | tf->hob_lbam = cdb[9]; | |
2854 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2855 | tf->flags |= ATA_TFLAG_LBA48; |
2856 | } else | |
2857 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2858 | ||
2859 | /* | |
2860 | * Always copy low byte, device and command registers. | |
2861 | */ | |
542b1444 TH |
2862 | tf->feature = cdb[4]; |
2863 | tf->nsect = cdb[6]; | |
2864 | tf->lbal = cdb[8]; | |
2865 | tf->lbam = cdb[10]; | |
2866 | tf->lbah = cdb[12]; | |
2867 | tf->device = cdb[13]; | |
2868 | tf->command = cdb[14]; | |
b095518e JG |
2869 | } else { |
2870 | /* | |
2871 | * 12-byte CDB - incapable of extended commands. | |
2872 | */ | |
2873 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2874 | ||
542b1444 TH |
2875 | tf->feature = cdb[3]; |
2876 | tf->nsect = cdb[4]; | |
2877 | tf->lbal = cdb[5]; | |
2878 | tf->lbam = cdb[6]; | |
2879 | tf->lbah = cdb[7]; | |
2880 | tf->device = cdb[8]; | |
2881 | tf->command = cdb[9]; | |
b095518e | 2882 | } |
fa4453c4 AL |
2883 | |
2884 | /* enforce correct master/slave bit */ | |
2885 | tf->device = dev->devno ? | |
2886 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2887 | |
1dce589c AL |
2888 | /* sanity check for pio multi commands */ |
2889 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2890 | goto invalid_fld; | |
2891 | ||
2892 | if (is_multi_taskfile(tf)) { | |
2893 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2894 | ||
2895 | /* compare the passed through multi_count | |
2896 | * with the cached multi_count of libata | |
2897 | */ | |
2898 | if (multi_count != dev->multi_count) | |
2899 | ata_dev_printk(dev, KERN_WARNING, | |
2900 | "invalid multi_count %u ignored\n", | |
2901 | multi_count); | |
d26fc955 | 2902 | } |
1dce589c | 2903 | |
5a5dbd18 ML |
2904 | /* READ/WRITE LONG use a non-standard sect_size */ |
2905 | qc->sect_size = ATA_SECT_SIZE; | |
2906 | switch (tf->command) { | |
2907 | case ATA_CMD_READ_LONG: | |
2908 | case ATA_CMD_READ_LONG_ONCE: | |
2909 | case ATA_CMD_WRITE_LONG: | |
2910 | case ATA_CMD_WRITE_LONG_ONCE: | |
2911 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2912 | goto invalid_fld; | |
7120165c | 2913 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2914 | } |
2915 | ||
b095518e JG |
2916 | /* |
2917 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2918 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2919 | * by an update to hardware-specific registers for each | |
2920 | * controller (i.e. the reason for ->set_piomode(), | |
2921 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2922 | */ | |
2923 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2924 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2925 | goto invalid_fld; |
b095518e JG |
2926 | |
2927 | /* | |
2928 | * Set flags so that all registers will be written, | |
2929 | * and pass on write indication (used for PIO/DMA | |
2930 | * setup.) | |
2931 | */ | |
2932 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2933 | ||
542b1444 | 2934 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2935 | tf->flags |= ATA_TFLAG_WRITE; |
2936 | ||
2937 | /* | |
2938 | * Set transfer length. | |
2939 | * | |
2940 | * TODO: find out if we need to do more here to | |
2941 | * cover scatter/gather case. | |
2942 | */ | |
aacda375 | 2943 | ata_qc_set_pc_nbytes(qc); |
b095518e | 2944 | |
e027bd36 TH |
2945 | /* request result TF and be quiet about device error */ |
2946 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
e61e0672 | 2947 | |
b095518e | 2948 | return 0; |
9a405257 TH |
2949 | |
2950 | invalid_fld: | |
542b1444 | 2951 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2952 | /* "Invalid field in cdb" */ |
2953 | return 1; | |
b095518e JG |
2954 | } |
2955 | ||
1da177e4 LT |
2956 | /** |
2957 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2958 | * @dev: ATA device | |
2959 | * @cmd: SCSI command opcode to consider | |
2960 | * | |
2961 | * Look up the SCSI command given, and determine whether the | |
2962 | * SCSI command is to be translated or simulated. | |
2963 | * | |
2964 | * RETURNS: | |
2965 | * Pointer to translation function if possible, %NULL if not. | |
2966 | */ | |
2967 | ||
2968 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2969 | { | |
2970 | switch (cmd) { | |
2971 | case READ_6: | |
2972 | case READ_10: | |
2973 | case READ_16: | |
2974 | ||
2975 | case WRITE_6: | |
2976 | case WRITE_10: | |
2977 | case WRITE_16: | |
2978 | return ata_scsi_rw_xlat; | |
2979 | ||
2980 | case SYNCHRONIZE_CACHE: | |
2981 | if (ata_try_flush_cache(dev)) | |
2982 | return ata_scsi_flush_xlat; | |
2983 | break; | |
2984 | ||
2985 | case VERIFY: | |
2986 | case VERIFY_16: | |
2987 | return ata_scsi_verify_xlat; | |
b095518e JG |
2988 | |
2989 | case ATA_12: | |
2990 | case ATA_16: | |
2991 | return ata_scsi_pass_thru; | |
da61396d | 2992 | |
972dcafb DG |
2993 | case START_STOP: |
2994 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2995 | } |
2996 | ||
2997 | return NULL; | |
2998 | } | |
2999 | ||
3000 | /** | |
3001 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
3002 | * @ap: ATA port to which the command was being sent | |
3003 | * @cmd: SCSI command to dump | |
3004 | * | |
3005 | * Prints the contents of a SCSI command via printk(). | |
3006 | */ | |
3007 | ||
3008 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
3009 | struct scsi_cmnd *cmd) | |
3010 | { | |
3011 | #ifdef ATA_DEBUG | |
3012 | struct scsi_device *scsidev = cmd->device; | |
3013 | u8 *scsicmd = cmd->cmnd; | |
3014 | ||
3015 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 3016 | ap->print_id, |
1da177e4 LT |
3017 | scsidev->channel, scsidev->id, scsidev->lun, |
3018 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
3019 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
3020 | scsicmd[8]); | |
3021 | #endif | |
3022 | } | |
3023 | ||
542b1444 | 3024 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
3025 | void (*done)(struct scsi_cmnd *), |
3026 | struct ata_device *dev) | |
eb3f0f9c | 3027 | { |
baf4fdfa ML |
3028 | u8 scsi_op = scmd->cmnd[0]; |
3029 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
3030 | int rc = 0; |
3031 | ||
eb3f0f9c | 3032 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
3033 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
3034 | goto bad_cdb_len; | |
eb3f0f9c | 3035 | |
baf4fdfa ML |
3036 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
3037 | } else { | |
3038 | if (unlikely(!scmd->cmd_len)) | |
3039 | goto bad_cdb_len; | |
3040 | ||
3041 | xlat_func = NULL; | |
3042 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
3043 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
3044 | int len = COMMAND_SIZE(scsi_op); |
3045 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
3046 | goto bad_cdb_len; |
3047 | ||
3048 | xlat_func = atapi_xlat; | |
3049 | } else { | |
3050 | /* ATA_16 passthru, treat as an ATA command */ | |
3051 | if (unlikely(scmd->cmd_len > 16)) | |
3052 | goto bad_cdb_len; | |
3053 | ||
3054 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
3055 | } | |
3056 | } | |
3057 | ||
3058 | if (xlat_func) | |
3059 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
3060 | else | |
3061 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
3062 | |
3063 | return rc; | |
baf4fdfa ML |
3064 | |
3065 | bad_cdb_len: | |
3066 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
3067 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
3068 | scmd->result = DID_ERROR << 16; | |
3069 | done(scmd); | |
3070 | return 0; | |
eb3f0f9c BK |
3071 | } |
3072 | ||
1da177e4 LT |
3073 | /** |
3074 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
3075 | * @cmd: SCSI command to be sent | |
3076 | * @done: Completion function, called when command is complete | |
3077 | * | |
3078 | * In some cases, this function translates SCSI commands into | |
3079 | * ATA taskfiles, and queues the taskfiles to be sent to | |
3080 | * hardware. In other cases, this function simulates a | |
3081 | * SCSI device by evaluating and responding to certain | |
3082 | * SCSI commands. This creates the overall effect of | |
3083 | * ATA and ATAPI devices appearing as SCSI devices. | |
3084 | * | |
3085 | * LOCKING: | |
cca3974e | 3086 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
3087 | * |
3088 | * RETURNS: | |
2115ea94 TH |
3089 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3090 | * 0 otherwise. | |
1da177e4 | 3091 | */ |
1da177e4 LT |
3092 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
3093 | { | |
3094 | struct ata_port *ap; | |
3095 | struct ata_device *dev; | |
3096 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 3097 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 3098 | int rc = 0; |
1da177e4 | 3099 | |
35bb94b1 | 3100 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
3101 | |
3102 | spin_unlock(shost->host_lock); | |
ba6a1308 | 3103 | spin_lock(ap->lock); |
1da177e4 LT |
3104 | |
3105 | ata_scsi_dump_cdb(ap, cmd); | |
3106 | ||
3107 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 3108 | if (likely(dev)) |
2115ea94 | 3109 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 3110 | else { |
1da177e4 LT |
3111 | cmd->result = (DID_BAD_TARGET << 16); |
3112 | done(cmd); | |
1da177e4 LT |
3113 | } |
3114 | ||
ba6a1308 | 3115 | spin_unlock(ap->lock); |
005a5a06 | 3116 | spin_lock(shost->host_lock); |
2115ea94 | 3117 | return rc; |
1da177e4 LT |
3118 | } |
3119 | ||
3120 | /** | |
3121 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 3122 | * @dev: the target device |
1da177e4 LT |
3123 | * @cmd: SCSI command being sent to device. |
3124 | * @done: SCSI command completion function. | |
3125 | * | |
3126 | * Interprets and directly executes a select list of SCSI commands | |
3127 | * that can be handled internally. | |
3128 | * | |
3129 | * LOCKING: | |
cca3974e | 3130 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3131 | */ |
3132 | ||
3373efd8 | 3133 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
3134 | void (*done)(struct scsi_cmnd *)) |
3135 | { | |
3136 | struct ata_scsi_args args; | |
057ace5e | 3137 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 3138 | u8 tmp8; |
1da177e4 | 3139 | |
9a3dccc4 TH |
3140 | args.dev = dev; |
3141 | args.id = dev->id; | |
1da177e4 LT |
3142 | args.cmd = cmd; |
3143 | args.done = done; | |
3144 | ||
3145 | switch(scsicmd[0]) { | |
2dcb407e JG |
3146 | /* TODO: worth improving? */ |
3147 | case FORMAT_UNIT: | |
3148 | ata_scsi_invalid_field(cmd, done); | |
3149 | break; | |
3150 | ||
3151 | case INQUIRY: | |
3152 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 3153 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
3154 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3155 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3156 | else switch (scsicmd[2]) { | |
3157 | case 0x00: | |
3158 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3159 | break; |
2dcb407e JG |
3160 | case 0x80: |
3161 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3162 | break; |
2dcb407e JG |
3163 | case 0x83: |
3164 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3165 | break; |
2dcb407e JG |
3166 | case 0x89: |
3167 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3168 | break; | |
1e9dbc92 MW |
3169 | case 0xb1: |
3170 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); | |
3171 | break; | |
2dcb407e | 3172 | default: |
ae006510 | 3173 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 3174 | break; |
2dcb407e JG |
3175 | } |
3176 | break; | |
3177 | ||
3178 | case MODE_SENSE: | |
3179 | case MODE_SENSE_10: | |
3180 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3181 | break; | |
3182 | ||
3183 | case MODE_SELECT: /* unconditionally return */ | |
3184 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3185 | ata_scsi_invalid_field(cmd, done); | |
3186 | break; | |
1da177e4 | 3187 | |
2dcb407e JG |
3188 | case READ_CAPACITY: |
3189 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3190 | break; | |
3191 | ||
3192 | case SERVICE_ACTION_IN: | |
3193 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3194 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3195 | else |
3196 | ata_scsi_invalid_field(cmd, done); | |
3197 | break; | |
1da177e4 | 3198 | |
2dcb407e JG |
3199 | case REPORT_LUNS: |
3200 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3201 | break; | |
1da177e4 | 3202 | |
2dcb407e JG |
3203 | case REQUEST_SENSE: |
3204 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3205 | cmd->result = (DRIVER_SENSE << 24); | |
3206 | done(cmd); | |
3207 | break; | |
1da177e4 | 3208 | |
2dcb407e JG |
3209 | /* if we reach this, then writeback caching is disabled, |
3210 | * turning this into a no-op. | |
3211 | */ | |
3212 | case SYNCHRONIZE_CACHE: | |
3213 | /* fall through */ | |
3214 | ||
3215 | /* no-op's, complete with success */ | |
3216 | case REZERO_UNIT: | |
3217 | case SEEK_6: | |
3218 | case SEEK_10: | |
3219 | case TEST_UNIT_READY: | |
3220 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3221 | break; | |
45394145 | 3222 | |
2dcb407e JG |
3223 | case SEND_DIAGNOSTIC: |
3224 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3225 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3226 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3227 | else |
3228 | ata_scsi_invalid_field(cmd, done); | |
3229 | break; | |
1da177e4 | 3230 | |
2dcb407e JG |
3231 | /* all other commands */ |
3232 | default: | |
3233 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3234 | /* "Invalid command operation code" */ | |
3235 | done(cmd); | |
3236 | break; | |
1da177e4 LT |
3237 | } |
3238 | } | |
3239 | ||
f3187195 TH |
3240 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3241 | { | |
3242 | int i, rc; | |
3243 | ||
3244 | for (i = 0; i < host->n_ports; i++) { | |
3245 | struct ata_port *ap = host->ports[i]; | |
3246 | struct Scsi_Host *shost; | |
3247 | ||
3248 | rc = -ENOMEM; | |
3249 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3250 | if (!shost) | |
3251 | goto err_alloc; | |
3252 | ||
3253 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3254 | ap->scsi_host = shost; | |
3255 | ||
3256 | shost->transportt = &ata_scsi_transport_template; | |
3257 | shost->unique_id = ap->print_id; | |
3258 | shost->max_id = 16; | |
3259 | shost->max_lun = 1; | |
3260 | shost->max_channel = 1; | |
3261 | shost->max_cmd_len = 16; | |
3262 | ||
31cc23b3 TH |
3263 | /* Schedule policy is determined by ->qc_defer() |
3264 | * callback and it needs to see every deferred qc. | |
3265 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3266 | * automatically deferring requests. | |
3267 | */ | |
3268 | shost->max_host_blocked = 1; | |
3269 | ||
f3187195 TH |
3270 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3271 | if (rc) | |
3272 | goto err_add; | |
3273 | } | |
3274 | ||
3275 | return 0; | |
3276 | ||
3277 | err_add: | |
3278 | scsi_host_put(host->ports[i]->scsi_host); | |
3279 | err_alloc: | |
3280 | while (--i >= 0) { | |
3281 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3282 | ||
3283 | scsi_remove_host(shost); | |
3284 | scsi_host_put(shost); | |
3285 | } | |
3286 | return rc; | |
3287 | } | |
3288 | ||
1ae46317 | 3289 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3290 | { |
1ae46317 TH |
3291 | int tries = 5; |
3292 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3293 | struct ata_link *link; |
1ae46317 | 3294 | struct ata_device *dev; |
644dd0cc | 3295 | |
198e0fed | 3296 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3297 | return; |
3298 | ||
1ae46317 | 3299 | repeat: |
1eca4365 TH |
3300 | ata_for_each_link(link, ap, EDGE) { |
3301 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 TH |
3302 | struct scsi_device *sdev; |
3303 | int channel = 0, id = 0; | |
3edebac4 | 3304 | |
1eca4365 | 3305 | if (dev->sdev) |
41bda9c9 | 3306 | continue; |
3f19ee8c | 3307 | |
41bda9c9 TH |
3308 | if (ata_is_host_link(link)) |
3309 | id = dev->devno; | |
3310 | else | |
3311 | channel = link->pmp; | |
3312 | ||
3313 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3314 | NULL); | |
3315 | if (!IS_ERR(sdev)) { | |
3316 | dev->sdev = sdev; | |
3317 | scsi_device_put(sdev); | |
3318 | } | |
3edebac4 | 3319 | } |
3f19ee8c | 3320 | } |
1ae46317 TH |
3321 | |
3322 | /* If we scanned while EH was in progress or allocation | |
3323 | * failure occurred, scan would have failed silently. Check | |
3324 | * whether all devices are attached. | |
3325 | */ | |
1eca4365 TH |
3326 | ata_for_each_link(link, ap, EDGE) { |
3327 | ata_for_each_dev(dev, link, ENABLED) { | |
3328 | if (!dev->sdev) | |
41bda9c9 TH |
3329 | goto exit_loop; |
3330 | } | |
1ae46317 | 3331 | } |
41bda9c9 TH |
3332 | exit_loop: |
3333 | if (!link) | |
1ae46317 TH |
3334 | return; |
3335 | ||
3336 | /* we're missing some SCSI devices */ | |
3337 | if (sync) { | |
3338 | /* If caller requested synchrnous scan && we've made | |
3339 | * any progress, sleep briefly and repeat. | |
3340 | */ | |
3341 | if (dev != last_failed_dev) { | |
3342 | msleep(100); | |
3343 | last_failed_dev = dev; | |
3344 | goto repeat; | |
3345 | } | |
3346 | ||
3347 | /* We might be failing to detect boot device, give it | |
3348 | * a few more chances. | |
3349 | */ | |
3350 | if (--tries) { | |
3351 | msleep(100); | |
3352 | goto repeat; | |
3353 | } | |
3354 | ||
3355 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3356 | "failed without making any progress,\n" | |
3357 | " switching to async\n"); | |
3358 | } | |
3359 | ||
3360 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3361 | round_jiffies_relative(HZ)); | |
644dd0cc | 3362 | } |
0ea035a3 TH |
3363 | |
3364 | /** | |
3365 | * ata_scsi_offline_dev - offline attached SCSI device | |
3366 | * @dev: ATA device to offline attached SCSI device for | |
3367 | * | |
3368 | * This function is called from ata_eh_hotplug() and responsible | |
3369 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3370 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3371 | * against clearing. |
3372 | * | |
3373 | * LOCKING: | |
cca3974e | 3374 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3375 | * |
3376 | * RETURNS: | |
3377 | * 1 if attached SCSI device exists, 0 otherwise. | |
3378 | */ | |
3379 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3380 | { | |
3381 | if (dev->sdev) { | |
3382 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3383 | return 1; | |
3384 | } | |
3385 | return 0; | |
3386 | } | |
580b2102 TH |
3387 | |
3388 | /** | |
3389 | * ata_scsi_remove_dev - remove attached SCSI device | |
3390 | * @dev: ATA device to remove attached SCSI device for | |
3391 | * | |
3392 | * This function is called from ata_eh_scsi_hotplug() and | |
3393 | * responsible for removing the SCSI device attached to @dev. | |
3394 | * | |
3395 | * LOCKING: | |
3396 | * Kernel thread context (may sleep). | |
3397 | */ | |
3398 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3399 | { | |
9af5c9c9 | 3400 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3401 | struct scsi_device *sdev; |
3402 | unsigned long flags; | |
3403 | ||
3404 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3405 | * state doesn't change underneath us and thus | |
3406 | * scsi_device_get() always succeeds. The mutex locking can | |
3407 | * be removed if there is __scsi_device_get() interface which | |
3408 | * increments reference counts regardless of device state. | |
3409 | */ | |
cca3974e | 3410 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3411 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3412 | |
cca3974e | 3413 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3414 | sdev = dev->sdev; |
3415 | dev->sdev = NULL; | |
3416 | ||
3417 | if (sdev) { | |
3418 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3419 | * away underneath us after the host lock and |
580b2102 TH |
3420 | * scan_mutex are released. Hold onto it. |
3421 | */ | |
3422 | if (scsi_device_get(sdev) == 0) { | |
3423 | /* The following ensures the attached sdev is | |
3424 | * offline on return from ata_scsi_offline_dev() | |
3425 | * regardless it wins or loses the race | |
3426 | * against this function. | |
3427 | */ | |
3428 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3429 | } else { | |
3430 | WARN_ON(1); | |
3431 | sdev = NULL; | |
3432 | } | |
3433 | } | |
3434 | ||
ba6a1308 | 3435 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3436 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3437 | |
3438 | if (sdev) { | |
3439 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
b9d5fc41 | 3440 | dev_name(&sdev->sdev_gendev)); |
580b2102 TH |
3441 | |
3442 | scsi_remove_device(sdev); | |
3443 | scsi_device_put(sdev); | |
3444 | } | |
3445 | } | |
3446 | ||
41bda9c9 TH |
3447 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3448 | { | |
3449 | struct ata_port *ap = link->ap; | |
3450 | struct ata_device *dev; | |
3451 | ||
1eca4365 | 3452 | ata_for_each_dev(dev, link, ALL) { |
41bda9c9 TH |
3453 | unsigned long flags; |
3454 | ||
3455 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3456 | continue; | |
3457 | ||
3458 | spin_lock_irqsave(ap->lock, flags); | |
3459 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3460 | spin_unlock_irqrestore(ap->lock, flags); | |
3461 | ||
3462 | ata_scsi_remove_dev(dev); | |
3463 | } | |
3464 | } | |
3465 | ||
2f294968 KCA |
3466 | /** |
3467 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3468 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3469 | * |
3470 | * Tell the block layer to send a media change notification | |
3471 | * event. | |
3472 | * | |
3473 | * LOCKING: | |
854c73a2 | 3474 | * spin_lock_irqsave(host lock) |
2f294968 | 3475 | */ |
854c73a2 | 3476 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3477 | { |
854c73a2 | 3478 | if (dev->sdev) |
f26792d5 JG |
3479 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3480 | GFP_ATOMIC); | |
2f294968 | 3481 | } |
2f294968 | 3482 | |
580b2102 TH |
3483 | /** |
3484 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3485 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3486 | * |
3487 | * Perform SCSI part of hotplug. It's executed from a separate | |
3488 | * workqueue after EH completes. This is necessary because SCSI | |
3489 | * hot plugging requires working EH and hot unplugging is | |
3490 | * synchronized with hot plugging with a mutex. | |
3491 | * | |
3492 | * LOCKING: | |
3493 | * Kernel thread context (may sleep). | |
3494 | */ | |
65f27f38 | 3495 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3496 | { |
65f27f38 DH |
3497 | struct ata_port *ap = |
3498 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3499 | int i; |
580b2102 | 3500 | |
b51e9e5d | 3501 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3502 | DPRINTK("ENTER/EXIT - unloading\n"); |
3503 | return; | |
3504 | } | |
3505 | ||
3506 | DPRINTK("ENTER\n"); | |
3507 | ||
41bda9c9 TH |
3508 | /* Unplug detached devices. We cannot use link iterator here |
3509 | * because PMP links have to be scanned even if PMP is | |
3510 | * currently not attached. Iterate manually. | |
3511 | */ | |
3512 | ata_scsi_handle_link_detach(&ap->link); | |
3513 | if (ap->pmp_link) | |
3514 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3515 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3516 | |
3517 | /* scan for new ones */ | |
1ae46317 | 3518 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3519 | |
3520 | DPRINTK("EXIT\n"); | |
3521 | } | |
83c47bcb TH |
3522 | |
3523 | /** | |
3524 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3525 | * @shost: SCSI host to scan | |
3526 | * @channel: Channel to scan | |
3527 | * @id: ID to scan | |
3528 | * @lun: LUN to scan | |
3529 | * | |
3530 | * This function is called when user explicitly requests bus | |
3531 | * scan. Set probe pending flag and invoke EH. | |
3532 | * | |
3533 | * LOCKING: | |
3534 | * SCSI layer (we don't care) | |
3535 | * | |
3536 | * RETURNS: | |
3537 | * Zero. | |
3538 | */ | |
3539 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3540 | unsigned int id, unsigned int lun) | |
3541 | { | |
3542 | struct ata_port *ap = ata_shost_to_port(shost); | |
3543 | unsigned long flags; | |
41bda9c9 | 3544 | int devno, rc = 0; |
83c47bcb TH |
3545 | |
3546 | if (!ap->ops->error_handler) | |
3547 | return -EOPNOTSUPP; | |
3548 | ||
41bda9c9 | 3549 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3550 | return -EINVAL; |
3551 | ||
071f44b1 | 3552 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
3553 | if (channel != SCAN_WILD_CARD && channel) |
3554 | return -EINVAL; | |
3555 | devno = id; | |
3556 | } else { | |
3557 | if (id != SCAN_WILD_CARD && id) | |
3558 | return -EINVAL; | |
3559 | devno = channel; | |
3560 | } | |
3561 | ||
ba6a1308 | 3562 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3563 | |
41bda9c9 TH |
3564 | if (devno == SCAN_WILD_CARD) { |
3565 | struct ata_link *link; | |
3566 | ||
1eca4365 | 3567 | ata_for_each_link(link, ap, EDGE) { |
41bda9c9 | 3568 | struct ata_eh_info *ehi = &link->eh_info; |
b558eddd | 3569 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 3570 | ehi->action |= ATA_EH_RESET; |
41bda9c9 | 3571 | } |
83c47bcb | 3572 | } else { |
41bda9c9 | 3573 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3574 | |
3575 | if (dev) { | |
41bda9c9 | 3576 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 | 3577 | ehi->probe_mask |= 1 << dev->devno; |
cf480626 | 3578 | ehi->action |= ATA_EH_RESET; |
83c47bcb TH |
3579 | } else |
3580 | rc = -EINVAL; | |
3581 | } | |
3582 | ||
309afcb5 | 3583 | if (rc == 0) { |
83c47bcb | 3584 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3585 | spin_unlock_irqrestore(ap->lock, flags); |
3586 | ata_port_wait_eh(ap); | |
3587 | } else | |
3588 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3589 | |
3590 | return rc; | |
3591 | } | |
3057ac3c | 3592 | |
3593 | /** | |
d0171269 | 3594 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3595 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3596 | * |
d0171269 TH |
3597 | * After ATA pass thru (SAT) commands are executed successfully, |
3598 | * libata need to propagate the changes to SCSI layer. This | |
3599 | * function must be executed from ata_aux_wq such that sdev | |
3600 | * attach/detach don't race with rescan. | |
3057ac3c | 3601 | * |
d0171269 TH |
3602 | * LOCKING: |
3603 | * Kernel thread context (may sleep). | |
3057ac3c | 3604 | */ |
65f27f38 | 3605 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3606 | { |
65f27f38 DH |
3607 | struct ata_port *ap = |
3608 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3609 | struct ata_link *link; |
f58229f8 | 3610 | struct ata_device *dev; |
f84e7e41 | 3611 | unsigned long flags; |
3057ac3c | 3612 | |
f84e7e41 TH |
3613 | spin_lock_irqsave(ap->lock, flags); |
3614 | ||
1eca4365 TH |
3615 | ata_for_each_link(link, ap, EDGE) { |
3616 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 | 3617 | struct scsi_device *sdev = dev->sdev; |
3057ac3c | 3618 | |
1eca4365 | 3619 | if (!sdev) |
41bda9c9 TH |
3620 | continue; |
3621 | if (scsi_device_get(sdev)) | |
3622 | continue; | |
f84e7e41 | 3623 | |
41bda9c9 TH |
3624 | spin_unlock_irqrestore(ap->lock, flags); |
3625 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3626 | scsi_device_put(sdev); | |
3627 | spin_lock_irqsave(ap->lock, flags); | |
3628 | } | |
3057ac3c | 3629 | } |
f84e7e41 TH |
3630 | |
3631 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3632 | } |
80289167 BK |
3633 | |
3634 | /** | |
3635 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3636 | * @host: ATA host container for all SAS ports |
80289167 | 3637 | * @port_info: Information from low-level host driver |
cca3974e | 3638 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3639 | * |
3640 | * LOCKING: | |
3641 | * PCI/etc. bus probe sem. | |
3642 | * | |
3643 | * RETURNS: | |
3644 | * ata_port pointer on success / NULL on failure. | |
3645 | */ | |
3646 | ||
cca3974e | 3647 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3648 | struct ata_port_info *port_info, |
cca3974e | 3649 | struct Scsi_Host *shost) |
80289167 | 3650 | { |
f3187195 | 3651 | struct ata_port *ap; |
80289167 | 3652 | |
f3187195 | 3653 | ap = ata_port_alloc(host); |
80289167 BK |
3654 | if (!ap) |
3655 | return NULL; | |
3656 | ||
f3187195 | 3657 | ap->port_no = 0; |
cca3974e | 3658 | ap->lock = shost->host_lock; |
f3187195 TH |
3659 | ap->pio_mask = port_info->pio_mask; |
3660 | ap->mwdma_mask = port_info->mwdma_mask; | |
3661 | ap->udma_mask = port_info->udma_mask; | |
3662 | ap->flags |= port_info->flags; | |
3663 | ap->ops = port_info->port_ops; | |
3664 | ap->cbl = ATA_CBL_SATA; | |
3665 | ||
80289167 BK |
3666 | return ap; |
3667 | } | |
3668 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3669 | ||
3670 | /** | |
3671 | * ata_sas_port_start - Set port up for dma. | |
3672 | * @ap: Port to initialize | |
3673 | * | |
3674 | * Called just after data structures for each port are | |
dde20207 | 3675 | * initialized. |
80289167 BK |
3676 | * |
3677 | * May be used as the port_start() entry in ata_port_operations. | |
3678 | * | |
3679 | * LOCKING: | |
3680 | * Inherited from caller. | |
3681 | */ | |
3682 | int ata_sas_port_start(struct ata_port *ap) | |
3683 | { | |
dde20207 | 3684 | return 0; |
80289167 BK |
3685 | } |
3686 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3687 | ||
3688 | /** | |
3689 | * ata_port_stop - Undo ata_sas_port_start() | |
3690 | * @ap: Port to shut down | |
3691 | * | |
80289167 BK |
3692 | * May be used as the port_stop() entry in ata_port_operations. |
3693 | * | |
3694 | * LOCKING: | |
3695 | * Inherited from caller. | |
3696 | */ | |
3697 | ||
3698 | void ata_sas_port_stop(struct ata_port *ap) | |
3699 | { | |
80289167 BK |
3700 | } |
3701 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3702 | ||
3703 | /** | |
3704 | * ata_sas_port_init - Initialize a SATA device | |
3705 | * @ap: SATA port to initialize | |
3706 | * | |
3707 | * LOCKING: | |
3708 | * PCI/etc. bus probe sem. | |
3709 | * | |
3710 | * RETURNS: | |
3711 | * Zero on success, non-zero on error. | |
3712 | */ | |
3713 | ||
3714 | int ata_sas_port_init(struct ata_port *ap) | |
3715 | { | |
3716 | int rc = ap->ops->port_start(ap); | |
3717 | ||
f3187195 TH |
3718 | if (!rc) { |
3719 | ap->print_id = ata_print_id++; | |
80289167 | 3720 | rc = ata_bus_probe(ap); |
f3187195 | 3721 | } |
80289167 BK |
3722 | |
3723 | return rc; | |
3724 | } | |
3725 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3726 | ||
3727 | /** | |
3728 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3729 | * @ap: SATA port to destroy | |
3730 | * | |
3731 | */ | |
3732 | ||
3733 | void ata_sas_port_destroy(struct ata_port *ap) | |
3734 | { | |
f0d36efd TH |
3735 | if (ap->ops->port_stop) |
3736 | ap->ops->port_stop(ap); | |
80289167 BK |
3737 | kfree(ap); |
3738 | } | |
3739 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3740 | ||
3741 | /** | |
3742 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3743 | * @sdev: SCSI device to configure | |
3744 | * @ap: ATA port to which SCSI device is attached | |
3745 | * | |
3746 | * RETURNS: | |
3747 | * Zero. | |
3748 | */ | |
3749 | ||
3750 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3751 | { | |
3752 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3753 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3754 | return 0; |
3755 | } | |
3756 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3757 | ||
3758 | /** | |
3759 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3760 | * @cmd: SCSI command to be sent | |
3761 | * @done: Completion function, called when command is complete | |
3762 | * @ap: ATA port to which the command is being sent | |
3763 | * | |
3764 | * RETURNS: | |
08475a19 BK |
3765 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3766 | * 0 otherwise. | |
80289167 BK |
3767 | */ |
3768 | ||
3769 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3770 | struct ata_port *ap) | |
3771 | { | |
08475a19 BK |
3772 | int rc = 0; |
3773 | ||
80289167 BK |
3774 | ata_scsi_dump_cdb(ap, cmd); |
3775 | ||
2486fa56 | 3776 | if (likely(ata_dev_enabled(ap->link.device))) |
9af5c9c9 | 3777 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); |
80289167 BK |
3778 | else { |
3779 | cmd->result = (DID_BAD_TARGET << 16); | |
3780 | done(cmd); | |
3781 | } | |
08475a19 | 3782 | return rc; |
80289167 BK |
3783 | } |
3784 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |