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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 | ||
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | #include <linux/kernel.h> |
38 | #include <linux/blkdev.h> | |
39 | #include <linux/spinlock.h> | |
40 | #include <scsi/scsi.h> | |
1da177e4 | 41 | #include <scsi/scsi_host.h> |
beb40487 | 42 | #include <scsi/scsi_cmnd.h> |
85837ebd | 43 | #include <scsi/scsi_eh.h> |
005a5a06 | 44 | #include <scsi/scsi_device.h> |
a6e6ce8e | 45 | #include <scsi/scsi_tcq.h> |
30afc84c | 46 | #include <scsi/scsi_transport.h> |
1da177e4 | 47 | #include <linux/libata.h> |
b095518e | 48 | #include <linux/hdreg.h> |
2dcb407e | 49 | #include <linux/uaccess.h> |
2a6e58d2 | 50 | #include <linux/suspend.h> |
18f0f978 | 51 | #include <asm/unaligned.h> |
1da177e4 LT |
52 | |
53 | #include "libata.h" | |
d9027470 | 54 | #include "libata-transport.h" |
1da177e4 | 55 | |
87340e98 TH |
56 | #define ATA_SCSI_RBUF_SIZE 4096 |
57 | ||
58 | static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); | |
59 | static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; | |
b095518e | 60 | |
ad706991 | 61 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); |
ab5b3a5b | 62 | |
2dcb407e | 63 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 64 | const struct scsi_device *scsidev); |
2dcb407e | 65 | static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 66 | const struct scsi_device *scsidev); |
1da177e4 | 67 | |
00ac37f5 DG |
68 | #define RW_RECOVERY_MPAGE 0x1 |
69 | #define RW_RECOVERY_MPAGE_LEN 12 | |
70 | #define CACHE_MPAGE 0x8 | |
71 | #define CACHE_MPAGE_LEN 20 | |
72 | #define CONTROL_MPAGE 0xa | |
73 | #define CONTROL_MPAGE_LEN 12 | |
74 | #define ALL_MPAGES 0x3f | |
75 | #define ALL_SUB_MPAGES 0xff | |
76 | ||
77 | ||
24f75686 | 78 | static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { |
00ac37f5 DG |
79 | RW_RECOVERY_MPAGE, |
80 | RW_RECOVERY_MPAGE_LEN - 2, | |
24f75686 | 81 | (1 << 7), /* AWRE */ |
00ac37f5 DG |
82 | 0, /* read retry count */ |
83 | 0, 0, 0, 0, | |
84 | 0, /* write retry count */ | |
85 | 0, 0, 0 | |
86 | }; | |
87 | ||
88 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
89 | CACHE_MPAGE, | |
90 | CACHE_MPAGE_LEN - 2, | |
91 | 0, /* contains WCE, needs to be 0 for logic */ | |
92 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
93 | 0, /* contains DRA, needs to be 0 for logic */ | |
94 | 0, 0, 0, 0, 0, 0, 0 | |
95 | }; | |
96 | ||
97 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
98 | CONTROL_MPAGE, | |
99 | CONTROL_MPAGE_LEN - 2, | |
100 | 2, /* DSENSE=0, GLTSD=1 */ | |
101 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
102 | 0, 0, 0, 0, 0xff, 0xff, | |
103 | 0, 30 /* extended self test time, see 05-359r1 */ | |
104 | }; | |
105 | ||
c93b263e TH |
106 | static const char *ata_lpm_policy_names[] = { |
107 | [ATA_LPM_UNKNOWN] = "max_performance", | |
108 | [ATA_LPM_MAX_POWER] = "max_performance", | |
109 | [ATA_LPM_MED_POWER] = "medium_power", | |
110 | [ATA_LPM_MIN_POWER] = "min_power", | |
ca77329f KCA |
111 | }; |
112 | ||
c93b263e TH |
113 | static ssize_t ata_scsi_lpm_store(struct device *dev, |
114 | struct device_attribute *attr, | |
115 | const char *buf, size_t count) | |
ca77329f | 116 | { |
ee959b00 | 117 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f | 118 | struct ata_port *ap = ata_shost_to_port(shost); |
c93b263e | 119 | enum ata_lpm_policy policy; |
6b7ae954 | 120 | unsigned long flags; |
c93b263e TH |
121 | |
122 | /* UNKNOWN is internal state, iterate from MAX_POWER */ | |
123 | for (policy = ATA_LPM_MAX_POWER; | |
124 | policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { | |
125 | const char *name = ata_lpm_policy_names[policy]; | |
126 | ||
127 | if (strncmp(name, buf, strlen(name)) == 0) | |
ca77329f | 128 | break; |
ca77329f | 129 | } |
c93b263e | 130 | if (policy == ARRAY_SIZE(ata_lpm_policy_names)) |
ca77329f KCA |
131 | return -EINVAL; |
132 | ||
6b7ae954 TH |
133 | spin_lock_irqsave(ap->lock, flags); |
134 | ap->target_lpm_policy = policy; | |
135 | ata_port_schedule_eh(ap); | |
136 | spin_unlock_irqrestore(ap->lock, flags); | |
137 | ||
ca77329f KCA |
138 | return count; |
139 | } | |
140 | ||
c93b263e TH |
141 | static ssize_t ata_scsi_lpm_show(struct device *dev, |
142 | struct device_attribute *attr, char *buf) | |
ca77329f | 143 | { |
ee959b00 | 144 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f | 145 | struct ata_port *ap = ata_shost_to_port(shost); |
ca77329f | 146 | |
6b7ae954 | 147 | if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) |
ca77329f KCA |
148 | return -EINVAL; |
149 | ||
c93b263e | 150 | return snprintf(buf, PAGE_SIZE, "%s\n", |
6b7ae954 | 151 | ata_lpm_policy_names[ap->target_lpm_policy]); |
ca77329f | 152 | } |
ee959b00 | 153 | DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, |
c93b263e | 154 | ata_scsi_lpm_show, ata_scsi_lpm_store); |
ee959b00 | 155 | EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); |
ca77329f | 156 | |
45fabbb7 EO |
157 | static ssize_t ata_scsi_park_show(struct device *device, |
158 | struct device_attribute *attr, char *buf) | |
159 | { | |
160 | struct scsi_device *sdev = to_scsi_device(device); | |
161 | struct ata_port *ap; | |
162 | struct ata_link *link; | |
163 | struct ata_device *dev; | |
a464189d | 164 | unsigned long flags, now; |
45fabbb7 EO |
165 | unsigned int uninitialized_var(msecs); |
166 | int rc = 0; | |
167 | ||
168 | ap = ata_shost_to_port(sdev->host); | |
169 | ||
170 | spin_lock_irqsave(ap->lock, flags); | |
171 | dev = ata_scsi_find_dev(ap, sdev); | |
172 | if (!dev) { | |
173 | rc = -ENODEV; | |
174 | goto unlock; | |
175 | } | |
176 | if (dev->flags & ATA_DFLAG_NO_UNLOAD) { | |
177 | rc = -EOPNOTSUPP; | |
178 | goto unlock; | |
179 | } | |
180 | ||
181 | link = dev->link; | |
a464189d | 182 | now = jiffies; |
45fabbb7 EO |
183 | if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && |
184 | link->eh_context.unloaded_mask & (1 << dev->devno) && | |
a464189d EO |
185 | time_after(dev->unpark_deadline, now)) |
186 | msecs = jiffies_to_msecs(dev->unpark_deadline - now); | |
45fabbb7 EO |
187 | else |
188 | msecs = 0; | |
189 | ||
190 | unlock: | |
191 | spin_unlock_irq(ap->lock); | |
192 | ||
193 | return rc ? rc : snprintf(buf, 20, "%u\n", msecs); | |
194 | } | |
195 | ||
196 | static ssize_t ata_scsi_park_store(struct device *device, | |
197 | struct device_attribute *attr, | |
198 | const char *buf, size_t len) | |
199 | { | |
200 | struct scsi_device *sdev = to_scsi_device(device); | |
201 | struct ata_port *ap; | |
202 | struct ata_device *dev; | |
203 | long int input; | |
204 | unsigned long flags; | |
205 | int rc; | |
206 | ||
207 | rc = strict_strtol(buf, 10, &input); | |
208 | if (rc || input < -2) | |
209 | return -EINVAL; | |
210 | if (input > ATA_TMOUT_MAX_PARK) { | |
211 | rc = -EOVERFLOW; | |
212 | input = ATA_TMOUT_MAX_PARK; | |
213 | } | |
214 | ||
215 | ap = ata_shost_to_port(sdev->host); | |
216 | ||
217 | spin_lock_irqsave(ap->lock, flags); | |
218 | dev = ata_scsi_find_dev(ap, sdev); | |
219 | if (unlikely(!dev)) { | |
220 | rc = -ENODEV; | |
221 | goto unlock; | |
222 | } | |
223 | if (dev->class != ATA_DEV_ATA) { | |
224 | rc = -EOPNOTSUPP; | |
225 | goto unlock; | |
226 | } | |
227 | ||
228 | if (input >= 0) { | |
229 | if (dev->flags & ATA_DFLAG_NO_UNLOAD) { | |
230 | rc = -EOPNOTSUPP; | |
231 | goto unlock; | |
232 | } | |
233 | ||
234 | dev->unpark_deadline = ata_deadline(jiffies, input); | |
235 | dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; | |
236 | ata_port_schedule_eh(ap); | |
237 | complete(&ap->park_req_pending); | |
238 | } else { | |
239 | switch (input) { | |
240 | case -1: | |
241 | dev->flags &= ~ATA_DFLAG_NO_UNLOAD; | |
242 | break; | |
243 | case -2: | |
244 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
245 | break; | |
246 | } | |
247 | } | |
248 | unlock: | |
249 | spin_unlock_irqrestore(ap->lock, flags); | |
250 | ||
251 | return rc ? rc : len; | |
252 | } | |
253 | DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, | |
254 | ata_scsi_park_show, ata_scsi_park_store); | |
255 | EXPORT_SYMBOL_GPL(dev_attr_unload_heads); | |
256 | ||
f0761be3 TH |
257 | static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) |
258 | { | |
259 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
260 | ||
261 | scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); | |
262 | } | |
263 | ||
18f7ba4c KCA |
264 | static ssize_t |
265 | ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, | |
266 | const char *buf, size_t count) | |
267 | { | |
268 | struct Scsi_Host *shost = class_to_shost(dev); | |
269 | struct ata_port *ap = ata_shost_to_port(shost); | |
270 | if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) | |
271 | return ap->ops->em_store(ap, buf, count); | |
272 | return -EINVAL; | |
273 | } | |
274 | ||
275 | static ssize_t | |
276 | ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, | |
277 | char *buf) | |
278 | { | |
279 | struct Scsi_Host *shost = class_to_shost(dev); | |
280 | struct ata_port *ap = ata_shost_to_port(shost); | |
281 | ||
282 | if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) | |
283 | return ap->ops->em_show(ap, buf); | |
284 | return -EINVAL; | |
285 | } | |
ea7a5ed5 | 286 | DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, |
18f7ba4c KCA |
287 | ata_scsi_em_message_show, ata_scsi_em_message_store); |
288 | EXPORT_SYMBOL_GPL(dev_attr_em_message); | |
289 | ||
290 | static ssize_t | |
291 | ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, | |
292 | char *buf) | |
293 | { | |
294 | struct Scsi_Host *shost = class_to_shost(dev); | |
295 | struct ata_port *ap = ata_shost_to_port(shost); | |
296 | ||
297 | return snprintf(buf, 23, "%d\n", ap->em_message_type); | |
298 | } | |
299 | DEVICE_ATTR(em_message_type, S_IRUGO, | |
300 | ata_scsi_em_message_type_show, NULL); | |
301 | EXPORT_SYMBOL_GPL(dev_attr_em_message_type); | |
302 | ||
303 | static ssize_t | |
304 | ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, | |
305 | char *buf) | |
306 | { | |
307 | struct scsi_device *sdev = to_scsi_device(dev); | |
308 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
309 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
310 | ||
311 | if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY)) | |
312 | return ap->ops->sw_activity_show(atadev, buf); | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | static ssize_t | |
317 | ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, | |
318 | const char *buf, size_t count) | |
319 | { | |
320 | struct scsi_device *sdev = to_scsi_device(dev); | |
321 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
322 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
323 | enum sw_activity val; | |
324 | int rc; | |
325 | ||
326 | if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) { | |
327 | val = simple_strtoul(buf, NULL, 0); | |
328 | switch (val) { | |
329 | case OFF: case BLINK_ON: case BLINK_OFF: | |
330 | rc = ap->ops->sw_activity_store(atadev, val); | |
331 | if (!rc) | |
332 | return count; | |
333 | else | |
334 | return rc; | |
335 | } | |
336 | } | |
337 | return -EINVAL; | |
338 | } | |
ea7a5ed5 | 339 | DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, |
18f7ba4c KCA |
340 | ata_scsi_activity_store); |
341 | EXPORT_SYMBOL_GPL(dev_attr_sw_activity); | |
342 | ||
45fabbb7 EO |
343 | struct device_attribute *ata_common_sdev_attrs[] = { |
344 | &dev_attr_unload_heads, | |
345 | NULL | |
346 | }; | |
347 | EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); | |
348 | ||
b27dcfb0 | 349 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd) |
ae006510 DG |
350 | { |
351 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
352 | /* "Invalid field in cbd" */ | |
b27dcfb0 | 353 | cmd->scsi_done(cmd); |
ae006510 DG |
354 | } |
355 | ||
1da177e4 LT |
356 | /** |
357 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
358 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
359 | * @bdev: block device associated with @sdev | |
360 | * @capacity: capacity of SCSI device | |
361 | * @geom: location to which geometry will be output | |
362 | * | |
363 | * Generic bios head/sector/cylinder calculator | |
364 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
365 | * mapping. Some situations may arise where the disk is not | |
366 | * bootable if this is not used. | |
367 | * | |
368 | * LOCKING: | |
369 | * Defined by the SCSI layer. We don't really care. | |
370 | * | |
371 | * RETURNS: | |
372 | * Zero. | |
373 | */ | |
374 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
375 | sector_t capacity, int geom[]) | |
376 | { | |
377 | geom[0] = 255; | |
378 | geom[1] = 63; | |
379 | sector_div(capacity, 255*63); | |
380 | geom[2] = capacity; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
d8d9129e TH |
385 | /** |
386 | * ata_scsi_unlock_native_capacity - unlock native capacity | |
387 | * @sdev: SCSI device to adjust device capacity for | |
388 | * | |
389 | * This function is called if a partition on @sdev extends beyond | |
390 | * the end of the device. It requests EH to unlock HPA. | |
391 | * | |
392 | * LOCKING: | |
393 | * Defined by the SCSI layer. Might sleep. | |
394 | */ | |
395 | void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) | |
396 | { | |
397 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
398 | struct ata_device *dev; | |
399 | unsigned long flags; | |
400 | ||
401 | spin_lock_irqsave(ap->lock, flags); | |
402 | ||
403 | dev = ata_scsi_find_dev(ap, sdev); | |
404 | if (dev && dev->n_sectors < dev->n_native_sectors) { | |
405 | dev->flags |= ATA_DFLAG_UNLOCK_HPA; | |
406 | dev->link->eh_info.action |= ATA_EH_RESET; | |
407 | ata_port_schedule_eh(ap); | |
408 | } | |
409 | ||
410 | spin_unlock_irqrestore(ap->lock, flags); | |
411 | ata_port_wait_eh(ap); | |
412 | } | |
413 | ||
5924b74c TH |
414 | /** |
415 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
5eb66fe0 | 416 | * @ap: target port |
5924b74c TH |
417 | * @sdev: SCSI device to get identify data for |
418 | * @arg: User buffer area for identify data | |
419 | * | |
420 | * LOCKING: | |
421 | * Defined by the SCSI layer. We don't really care. | |
422 | * | |
423 | * RETURNS: | |
424 | * Zero on success, negative errno on error. | |
425 | */ | |
94be9a58 JG |
426 | static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, |
427 | void __user *arg) | |
5924b74c | 428 | { |
5924b74c TH |
429 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); |
430 | u16 __user *dst = arg; | |
431 | char buf[40]; | |
432 | ||
433 | if (!dev) | |
434 | return -ENOMSG; | |
435 | ||
436 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
437 | return -EFAULT; | |
438 | ||
439 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
440 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
441 | return -EFAULT; | |
442 | ||
443 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
444 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
445 | return -EFAULT; | |
446 | ||
447 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
448 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
449 | return -EFAULT; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
b095518e JG |
454 | /** |
455 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 456 | * @scsidev: Device to which we are issuing command |
b095518e JG |
457 | * @arg: User provided data for issuing command |
458 | * | |
459 | * LOCKING: | |
460 | * Defined by the SCSI layer. We don't really care. | |
461 | * | |
462 | * RETURNS: | |
463 | * Zero on success, negative errno on error. | |
464 | */ | |
b095518e JG |
465 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
466 | { | |
467 | int rc = 0; | |
468 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 469 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 470 | int argsize = 0; |
85837ebd | 471 | enum dma_data_direction data_dir; |
bbe1fe7e | 472 | int cmd_result; |
b095518e | 473 | |
c893a3ae | 474 | if (arg == NULL) |
b095518e JG |
475 | return -EINVAL; |
476 | ||
477 | if (copy_from_user(args, arg, sizeof(args))) | |
478 | return -EFAULT; | |
479 | ||
bbe1fe7e ET |
480 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
481 | if (!sensebuf) | |
482 | return -ENOMEM; | |
483 | ||
b095518e JG |
484 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
485 | ||
486 | if (args[3]) { | |
295124dc | 487 | argsize = ATA_SECT_SIZE * args[3]; |
b095518e | 488 | argbuf = kmalloc(argsize, GFP_KERNEL); |
54dac83c JR |
489 | if (argbuf == NULL) { |
490 | rc = -ENOMEM; | |
491 | goto error; | |
492 | } | |
b095518e JG |
493 | |
494 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
495 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
2dcb407e | 496 | block count in sector count field */ |
85837ebd | 497 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
498 | } else { |
499 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 500 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 501 | data_dir = DMA_NONE; |
b095518e JG |
502 | } |
503 | ||
504 | scsi_cmd[0] = ATA_16; | |
505 | ||
506 | scsi_cmd[4] = args[2]; | |
a4f19040 | 507 | if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ |
b095518e JG |
508 | scsi_cmd[6] = args[3]; |
509 | scsi_cmd[8] = args[1]; | |
510 | scsi_cmd[10] = 0x4f; | |
511 | scsi_cmd[12] = 0xc2; | |
512 | } else { | |
513 | scsi_cmd[6] = args[1]; | |
514 | } | |
515 | scsi_cmd[14] = args[0]; | |
516 | ||
517 | /* Good values for timeout and retries? Values below | |
518 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e | 519 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
f4f4e47e | 520 | sensebuf, (10*HZ), 5, 0, NULL); |
bbe1fe7e ET |
521 | |
522 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
523 | u8 *desc = sensebuf + 8; | |
524 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
525 | ||
526 | /* If we set cc then ATA pass-through will cause a | |
527 | * check condition even if no error. Filter that. */ | |
528 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
529 | struct scsi_sense_hdr sshdr; | |
530 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
2dcb407e JG |
531 | &sshdr); |
532 | if (sshdr.sense_key == 0 && | |
533 | sshdr.asc == 0 && sshdr.ascq == 0) | |
bbe1fe7e ET |
534 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
535 | } | |
536 | ||
537 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
2dcb407e JG |
538 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ |
539 | desc[0] == 0x09) { /* code is "ATA Descriptor" */ | |
540 | args[0] = desc[13]; /* status */ | |
541 | args[1] = desc[3]; /* error */ | |
542 | args[2] = desc[5]; /* sector count (0:7) */ | |
bbe1fe7e ET |
543 | if (copy_to_user(arg, args, sizeof(args))) |
544 | rc = -EFAULT; | |
545 | } | |
546 | } | |
547 | ||
548 | ||
549 | if (cmd_result) { | |
b095518e JG |
550 | rc = -EIO; |
551 | goto error; | |
552 | } | |
553 | ||
b095518e | 554 | if ((argbuf) |
c893a3ae | 555 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
556 | rc = -EFAULT; |
557 | error: | |
bbe1fe7e | 558 | kfree(sensebuf); |
8f760780 | 559 | kfree(argbuf); |
b095518e JG |
560 | return rc; |
561 | } | |
562 | ||
563 | /** | |
564 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 565 | * @scsidev: Device to which we are issuing command |
b095518e JG |
566 | * @arg: User provided data for issuing command |
567 | * | |
568 | * LOCKING: | |
569 | * Defined by the SCSI layer. We don't really care. | |
570 | * | |
571 | * RETURNS: | |
572 | * Zero on success, negative errno on error. | |
573 | */ | |
574 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
575 | { | |
576 | int rc = 0; | |
577 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
578 | u8 args[7], *sensebuf = NULL; |
579 | int cmd_result; | |
b095518e | 580 | |
c893a3ae | 581 | if (arg == NULL) |
b095518e JG |
582 | return -EINVAL; |
583 | ||
584 | if (copy_from_user(args, arg, sizeof(args))) | |
585 | return -EFAULT; | |
586 | ||
af068bd1 DM |
587 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
588 | if (!sensebuf) | |
589 | return -ENOMEM; | |
590 | ||
b095518e JG |
591 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
592 | scsi_cmd[0] = ATA_16; | |
593 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 594 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
595 | scsi_cmd[4] = args[1]; |
596 | scsi_cmd[6] = args[2]; | |
597 | scsi_cmd[8] = args[3]; | |
598 | scsi_cmd[10] = args[4]; | |
599 | scsi_cmd[12] = args[5]; | |
277239f2 | 600 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
601 | scsi_cmd[14] = args[0]; |
602 | ||
b095518e | 603 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 604 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 | 605 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
f4f4e47e | 606 | sensebuf, (10*HZ), 5, 0, NULL); |
af068bd1 DM |
607 | |
608 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
609 | u8 *desc = sensebuf + 8; | |
610 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
611 | ||
612 | /* If we set cc then ATA pass-through will cause a | |
613 | * check condition even if no error. Filter that. */ | |
614 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
615 | struct scsi_sense_hdr sshdr; | |
616 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
617 | &sshdr); | |
2dcb407e JG |
618 | if (sshdr.sense_key == 0 && |
619 | sshdr.asc == 0 && sshdr.ascq == 0) | |
af068bd1 DM |
620 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
621 | } | |
622 | ||
623 | /* Send userspace ATA registers */ | |
624 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
625 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
626 | args[0] = desc[13]; /* status */ | |
627 | args[1] = desc[3]; /* error */ | |
628 | args[2] = desc[5]; /* sector count (0:7) */ | |
629 | args[3] = desc[7]; /* lbal */ | |
630 | args[4] = desc[9]; /* lbam */ | |
631 | args[5] = desc[11]; /* lbah */ | |
632 | args[6] = desc[12]; /* select */ | |
633 | if (copy_to_user(arg, args, sizeof(args))) | |
634 | rc = -EFAULT; | |
635 | } | |
636 | } | |
637 | ||
638 | if (cmd_result) { | |
b095518e | 639 | rc = -EIO; |
af068bd1 DM |
640 | goto error; |
641 | } | |
b095518e | 642 | |
af068bd1 DM |
643 | error: |
644 | kfree(sensebuf); | |
b095518e JG |
645 | return rc; |
646 | } | |
647 | ||
e3cf95dd AC |
648 | static int ata_ioc32(struct ata_port *ap) |
649 | { | |
650 | if (ap->flags & ATA_FLAG_PIO_DMA) | |
651 | return 1; | |
652 | if (ap->pflags & ATA_PFLAG_PIO32) | |
653 | return 1; | |
654 | return 0; | |
655 | } | |
656 | ||
94be9a58 JG |
657 | int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, |
658 | int cmd, void __user *arg) | |
1da177e4 | 659 | { |
1da177e4 | 660 | int val = -EINVAL, rc = -EINVAL; |
e3cf95dd | 661 | unsigned long flags; |
1da177e4 | 662 | |
1da177e4 LT |
663 | switch (cmd) { |
664 | case ATA_IOC_GET_IO32: | |
e3cf95dd AC |
665 | spin_lock_irqsave(ap->lock, flags); |
666 | val = ata_ioc32(ap); | |
667 | spin_unlock_irqrestore(ap->lock, flags); | |
1da177e4 LT |
668 | if (copy_to_user(arg, &val, 1)) |
669 | return -EFAULT; | |
670 | return 0; | |
671 | ||
672 | case ATA_IOC_SET_IO32: | |
673 | val = (unsigned long) arg; | |
e3cf95dd AC |
674 | rc = 0; |
675 | spin_lock_irqsave(ap->lock, flags); | |
676 | if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { | |
677 | if (val) | |
678 | ap->pflags |= ATA_PFLAG_PIO32; | |
679 | else | |
680 | ap->pflags &= ~ATA_PFLAG_PIO32; | |
681 | } else { | |
682 | if (val != ata_ioc32(ap)) | |
683 | rc = -EINVAL; | |
684 | } | |
685 | spin_unlock_irqrestore(ap->lock, flags); | |
686 | return rc; | |
1da177e4 | 687 | |
5924b74c | 688 | case HDIO_GET_IDENTITY: |
94be9a58 | 689 | return ata_get_identity(ap, scsidev, arg); |
5924b74c | 690 | |
b095518e JG |
691 | case HDIO_DRIVE_CMD: |
692 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
693 | return -EACCES; | |
694 | return ata_cmd_ioctl(scsidev, arg); | |
695 | ||
696 | case HDIO_DRIVE_TASK: | |
697 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
698 | return -EACCES; | |
699 | return ata_task_ioctl(scsidev, arg); | |
700 | ||
1da177e4 LT |
701 | default: |
702 | rc = -ENOTTY; | |
703 | break; | |
704 | } | |
705 | ||
1da177e4 LT |
706 | return rc; |
707 | } | |
94be9a58 JG |
708 | EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); |
709 | ||
710 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
711 | { | |
712 | return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), | |
713 | scsidev, cmd, arg); | |
714 | } | |
715 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); | |
1da177e4 LT |
716 | |
717 | /** | |
718 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
719 | * @dev: ATA device to which the new command is attached |
720 | * @cmd: SCSI command that originated this ATA command | |
1da177e4 LT |
721 | * |
722 | * Obtain a reference to an unused ata_queued_cmd structure, | |
723 | * which is the basic libata structure representing a single | |
724 | * ATA command sent to the hardware. | |
725 | * | |
726 | * If a command was available, fill in the SCSI-specific | |
727 | * portions of the structure with information on the | |
728 | * current command. | |
729 | * | |
730 | * LOCKING: | |
cca3974e | 731 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
732 | * |
733 | * RETURNS: | |
734 | * Command allocated, or %NULL if none available. | |
735 | */ | |
7102d230 | 736 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
b27dcfb0 | 737 | struct scsi_cmnd *cmd) |
1da177e4 LT |
738 | { |
739 | struct ata_queued_cmd *qc; | |
740 | ||
8a8bc223 | 741 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
742 | if (qc) { |
743 | qc->scsicmd = cmd; | |
b27dcfb0 | 744 | qc->scsidone = cmd->scsi_done; |
1da177e4 | 745 | |
ff2aeb1e | 746 | qc->sg = scsi_sglist(cmd); |
7120165c | 747 | qc->n_elem = scsi_sg_count(cmd); |
1da177e4 LT |
748 | } else { |
749 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
b27dcfb0 | 750 | cmd->scsi_done(cmd); |
1da177e4 LT |
751 | } |
752 | ||
753 | return qc; | |
754 | } | |
755 | ||
aacda375 TH |
756 | static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) |
757 | { | |
758 | struct scsi_cmnd *scmd = qc->scsicmd; | |
759 | ||
760 | qc->extrabytes = scmd->request->extra_len; | |
761 | qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; | |
762 | } | |
763 | ||
b095518e JG |
764 | /** |
765 | * ata_dump_status - user friendly display of error info | |
766 | * @id: id of the port in question | |
767 | * @tf: ptr to filled out taskfile | |
768 | * | |
769 | * Decode and dump the ATA error/status registers for the user so | |
770 | * that they have some idea what really happened at the non | |
771 | * make-believe layer. | |
772 | * | |
773 | * LOCKING: | |
774 | * inherited from caller | |
775 | */ | |
7102d230 | 776 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
777 | { |
778 | u8 stat = tf->command, err = tf->feature; | |
779 | ||
780 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
781 | if (stat & ATA_BUSY) { | |
782 | printk("Busy }\n"); /* Data is not valid in this case */ | |
783 | } else { | |
784 | if (stat & 0x40) printk("DriveReady "); | |
785 | if (stat & 0x20) printk("DeviceFault "); | |
786 | if (stat & 0x10) printk("SeekComplete "); | |
787 | if (stat & 0x08) printk("DataRequest "); | |
788 | if (stat & 0x04) printk("CorrectedError "); | |
789 | if (stat & 0x02) printk("Index "); | |
790 | if (stat & 0x01) printk("Error "); | |
791 | printk("}\n"); | |
792 | ||
793 | if (err) { | |
794 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
795 | if (err & 0x04) printk("DriveStatusError "); | |
796 | if (err & 0x80) { | |
797 | if (err & 0x04) printk("BadCRC "); | |
798 | else printk("Sector "); | |
799 | } | |
800 | if (err & 0x40) printk("UncorrectableError "); | |
801 | if (err & 0x10) printk("SectorIdNotFound "); | |
802 | if (err & 0x02) printk("TrackZeroNotFound "); | |
803 | if (err & 0x01) printk("AddrMarkNotFound "); | |
804 | printk("}\n"); | |
805 | } | |
806 | } | |
807 | } | |
808 | ||
1da177e4 LT |
809 | /** |
810 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 811 | * @id: ATA device number |
1da177e4 | 812 | * @drv_stat: value contained in ATA status register |
b095518e JG |
813 | * @drv_err: value contained in ATA error register |
814 | * @sk: the sense key we'll fill out | |
815 | * @asc: the additional sense code we'll fill out | |
816 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 817 | * @verbose: be verbose |
1da177e4 | 818 | * |
b095518e JG |
819 | * Converts an ATA error into a SCSI error. Fill out pointers to |
820 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
821 | * format sense blocks. | |
1da177e4 LT |
822 | * |
823 | * LOCKING: | |
cca3974e | 824 | * spin_lock_irqsave(host lock) |
1da177e4 | 825 | */ |
7102d230 AB |
826 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
827 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 828 | { |
b095518e | 829 | int i; |
ffe75ef6 | 830 | |
1da177e4 | 831 | /* Based on the 3ware driver translation table */ |
98ac62de | 832 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
833 | /* BBD|ECC|ID|MAR */ |
834 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
835 | /* BBD|ECC|ID */ | |
836 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
837 | /* ECC|MC|MARK */ | |
838 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
839 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
840 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
841 | /* MC|ID|ABRT|TRK0|MARK */ | |
842 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
843 | /* MCR|MARK */ | |
844 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
845 | /* Bad address mark */ | |
846 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
847 | /* TRK0 */ | |
848 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
849 | /* Abort & !ICRC */ | |
850 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
851 | /* Media change request */ | |
852 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
853 | /* SRV */ | |
854 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
855 | /* Media change */ | |
856 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
857 | /* ECC */ | |
858 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
859 | /* BBD - block marked bad */ | |
860 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
861 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
862 | }; | |
98ac62de | 863 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
864 | /* Must be first because BUSY means no other bits valid */ |
865 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
866 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
867 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
868 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
869 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
870 | }; | |
1da177e4 | 871 | |
1da177e4 LT |
872 | /* |
873 | * Is this an error we can process/parse | |
874 | */ | |
b095518e JG |
875 | if (drv_stat & ATA_BUSY) { |
876 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 877 | } |
b095518e JG |
878 | |
879 | if (drv_err) { | |
880 | /* Look for drv_err */ | |
881 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
882 | /* Look for best matches first */ | |
2e9edbf8 | 883 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
884 | sense_table[i][0]) { |
885 | *sk = sense_table[i][1]; | |
886 | *asc = sense_table[i][2]; | |
887 | *ascq = sense_table[i][3]; | |
888 | goto translate_done; | |
889 | } | |
890 | } | |
891 | /* No immediate match */ | |
246619da TH |
892 | if (verbose) |
893 | printk(KERN_WARNING "ata%u: no sense translation for " | |
894 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 895 | } |
b095518e JG |
896 | |
897 | /* Fall back to interpreting status bits */ | |
898 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
899 | if (stat_table[i][0] & drv_stat) { | |
900 | *sk = stat_table[i][1]; | |
901 | *asc = stat_table[i][2]; | |
902 | *ascq = stat_table[i][3]; | |
903 | goto translate_done; | |
1da177e4 | 904 | } |
b095518e JG |
905 | } |
906 | /* No error? Undecoded? */ | |
246619da TH |
907 | if (verbose) |
908 | printk(KERN_WARNING "ata%u: no sense translation for " | |
909 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 910 | |
2d202024 AC |
911 | /* We need a sensible error return here, which is tricky, and one |
912 | that won't cause people to do things like return a disk wrongly */ | |
913 | *sk = ABORTED_COMMAND; | |
914 | *asc = 0x00; | |
915 | *ascq = 0x00; | |
b095518e JG |
916 | |
917 | translate_done: | |
246619da TH |
918 | if (verbose) |
919 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
920 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
921 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
922 | return; |
923 | } | |
924 | ||
925 | /* | |
750426aa | 926 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
927 | * @qc: Command that completed. |
928 | * | |
929 | * This function is specific to the ATA descriptor format sense | |
930 | * block specified for the ATA pass through commands. Regardless | |
931 | * of whether the command errored or not, return a sense | |
932 | * block. Copy all controller registers into the sense | |
933 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
934 | * | |
935 | * LOCKING: | |
750426aa | 936 | * None. |
b095518e | 937 | */ |
750426aa | 938 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
939 | { |
940 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 941 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
942 | unsigned char *sb = cmd->sense_buffer; |
943 | unsigned char *desc = sb + 8; | |
246619da | 944 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
945 | |
946 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
947 | ||
0e5dec47 | 948 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 949 | |
b095518e JG |
950 | /* |
951 | * Use ata_to_sense_error() to map status register bits | |
952 | * onto sense key, asc & ascq. | |
953 | */ | |
058e55e1 TH |
954 | if (qc->err_mask || |
955 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 956 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 957 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 958 | sb[1] &= 0x0f; |
1da177e4 LT |
959 | } |
960 | ||
b095518e JG |
961 | /* |
962 | * Sense data is current and format is descriptor. | |
963 | */ | |
964 | sb[0] = 0x72; | |
1da177e4 | 965 | |
b095518e JG |
966 | desc[0] = 0x09; |
967 | ||
f38621b3 TH |
968 | /* set length of additional sense data */ |
969 | sb[7] = 14; | |
970 | desc[1] = 12; | |
b095518e JG |
971 | |
972 | /* | |
973 | * Copy registers into sense buffer. | |
974 | */ | |
975 | desc[2] = 0x00; | |
976 | desc[3] = tf->feature; /* == error reg */ | |
977 | desc[5] = tf->nsect; | |
978 | desc[7] = tf->lbal; | |
979 | desc[9] = tf->lbam; | |
980 | desc[11] = tf->lbah; | |
981 | desc[12] = tf->device; | |
982 | desc[13] = tf->command; /* == status reg */ | |
983 | ||
984 | /* | |
985 | * Fill in Extend bit, and the high order bytes | |
986 | * if applicable. | |
987 | */ | |
988 | if (tf->flags & ATA_TFLAG_LBA48) { | |
989 | desc[2] |= 0x01; | |
990 | desc[4] = tf->hob_nsect; | |
991 | desc[6] = tf->hob_lbal; | |
992 | desc[8] = tf->hob_lbam; | |
993 | desc[10] = tf->hob_lbah; | |
1da177e4 | 994 | } |
b095518e | 995 | } |
1da177e4 | 996 | |
b095518e | 997 | /** |
750426aa | 998 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
999 | * @qc: Command that we are erroring out |
1000 | * | |
d25614ba | 1001 | * Generate sense block for a failed ATA command @qc. Descriptor |
25985edc | 1002 | * format is used to accommodate LBA48 block address. |
b095518e JG |
1003 | * |
1004 | * LOCKING: | |
750426aa | 1005 | * None. |
b095518e | 1006 | */ |
750426aa | 1007 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 1008 | { |
d25614ba | 1009 | struct ata_device *dev = qc->dev; |
b095518e | 1010 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 1011 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 1012 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 1013 | unsigned char *desc = sb + 8; |
246619da | 1014 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 1015 | u64 block; |
b095518e JG |
1016 | |
1017 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
1018 | ||
0e5dec47 | 1019 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 1020 | |
d25614ba TH |
1021 | /* sense data is current and format is descriptor */ |
1022 | sb[0] = 0x72; | |
1023 | ||
1024 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
1025 | * onto sense key, asc & ascq. |
1026 | */ | |
058e55e1 TH |
1027 | if (qc->err_mask || |
1028 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 1029 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
1030 | &sb[1], &sb[2], &sb[3], verbose); |
1031 | sb[1] &= 0x0f; | |
1da177e4 | 1032 | } |
1da177e4 | 1033 | |
d25614ba | 1034 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 1035 | |
d25614ba TH |
1036 | /* information sense data descriptor */ |
1037 | sb[7] = 12; | |
1038 | desc[0] = 0x00; | |
1039 | desc[1] = 10; | |
a7dac447 | 1040 | |
d25614ba TH |
1041 | desc[2] |= 0x80; /* valid */ |
1042 | desc[6] = block >> 40; | |
1043 | desc[7] = block >> 32; | |
1044 | desc[8] = block >> 24; | |
1045 | desc[9] = block >> 16; | |
1046 | desc[10] = block >> 8; | |
1047 | desc[11] = block; | |
1da177e4 LT |
1048 | } |
1049 | ||
a6cce2a7 BK |
1050 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
1051 | { | |
1052 | sdev->use_10_for_rw = 1; | |
1053 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
1054 | |
1055 | /* Schedule policy is determined by ->qc_defer() callback and | |
1056 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
1057 | * prevent SCSI midlayer from automatically deferring | |
1058 | * requests. | |
1059 | */ | |
1060 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
1061 | } |
1062 | ||
fa2fc7f4 JB |
1063 | /** |
1064 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 1065 | * @rq: request to be checked |
fa2fc7f4 JB |
1066 | * |
1067 | * ATAPI commands which transfer variable length data to host | |
1068 | * might overflow due to application error or hardare bug. This | |
1069 | * function checks whether overflow should be drained and ignored | |
1070 | * for @request. | |
1071 | * | |
1072 | * LOCKING: | |
1073 | * None. | |
1074 | * | |
1075 | * RETURNS: | |
1076 | * 1 if ; otherwise, 0. | |
1077 | */ | |
1078 | static int atapi_drain_needed(struct request *rq) | |
1079 | { | |
33659ebb | 1080 | if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) |
fa2fc7f4 JB |
1081 | return 0; |
1082 | ||
7b6d91da | 1083 | if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) |
fa2fc7f4 JB |
1084 | return 0; |
1085 | ||
1086 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
1087 | } | |
1088 | ||
1089 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
1090 | struct ata_device *dev) | |
a6cce2a7 | 1091 | { |
900e599e | 1092 | struct request_queue *q = sdev->request_queue; |
1093 | ||
45fabbb7 EO |
1094 | if (!ata_id_has_unload(dev->id)) |
1095 | dev->flags |= ATA_DFLAG_NO_UNLOAD; | |
1096 | ||
914ed354 | 1097 | /* configure max sectors */ |
900e599e | 1098 | blk_queue_max_hw_sectors(q, dev->max_sectors); |
a6cce2a7 | 1099 | |
fa2fc7f4 | 1100 | if (dev->class == ATA_DEV_ATAPI) { |
fa2fc7f4 JB |
1101 | void *buf; |
1102 | ||
729a6a30 TH |
1103 | sdev->sector_size = ATA_SECT_SIZE; |
1104 | ||
1105 | /* set DMA padding */ | |
900e599e | 1106 | blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); |
fa2fc7f4 JB |
1107 | |
1108 | /* configure draining */ | |
1109 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
1110 | if (!buf) { | |
1111 | ata_dev_printk(dev, KERN_ERR, | |
1112 | "drain buffer allocation failed\n"); | |
1113 | return -ENOMEM; | |
1114 | } | |
1115 | ||
1116 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
1117 | } else { | |
295124dc | 1118 | sdev->sector_size = ata_id_logical_sector_size(dev->id); |
d8cf5389 | 1119 | sdev->manage_start_stop = 1; |
dde20207 | 1120 | } |
d8cf5389 | 1121 | |
729a6a30 TH |
1122 | /* |
1123 | * ata_pio_sectors() expects buffer for each sector to not cross | |
1124 | * page boundary. Enforce it by requiring buffers to be sector | |
1125 | * aligned, which works iff sector_size is not larger than | |
1126 | * PAGE_SIZE. ATAPI devices also need the alignment as | |
1127 | * IDENTIFY_PACKET is executed as ATA_PROT_PIO. | |
1128 | */ | |
1129 | if (sdev->sector_size > PAGE_SIZE) | |
1130 | ata_dev_printk(dev, KERN_WARNING, | |
1131 | "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", | |
1132 | sdev->sector_size); | |
1133 | ||
900e599e | 1134 | blk_queue_update_dma_alignment(q, sdev->sector_size - 1); |
729a6a30 | 1135 | |
f26792d5 JG |
1136 | if (dev->flags & ATA_DFLAG_AN) |
1137 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
1138 | ||
a6e6ce8e TH |
1139 | if (dev->flags & ATA_DFLAG_NCQ) { |
1140 | int depth; | |
1141 | ||
1142 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
1143 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
8a8bc223 | 1144 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); |
a6e6ce8e | 1145 | } |
fa2fc7f4 | 1146 | |
900e599e | 1147 | blk_queue_flush_queueable(q, false); |
1148 | ||
295124dc | 1149 | dev->sdev = sdev; |
fa2fc7f4 | 1150 | return 0; |
a6cce2a7 BK |
1151 | } |
1152 | ||
1da177e4 LT |
1153 | /** |
1154 | * ata_scsi_slave_config - Set SCSI device attributes | |
1155 | * @sdev: SCSI device to examine | |
1156 | * | |
1157 | * This is called before we actually start reading | |
1158 | * and writing to the device, to configure certain | |
1159 | * SCSI mid-layer behaviors. | |
1160 | * | |
1161 | * LOCKING: | |
1162 | * Defined by SCSI layer. We don't really care. | |
1163 | */ | |
1164 | ||
1165 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
1166 | { | |
31534363 TH |
1167 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
1168 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 1169 | int rc = 0; |
31534363 | 1170 | |
a6cce2a7 | 1171 | ata_scsi_sdev_config(sdev); |
1da177e4 | 1172 | |
31534363 | 1173 | if (dev) |
fa2fc7f4 | 1174 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 1175 | |
fa2fc7f4 | 1176 | return rc; |
1da177e4 LT |
1177 | } |
1178 | ||
83c47bcb TH |
1179 | /** |
1180 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
1181 | * @sdev: SCSI device to be destroyed | |
1182 | * | |
1183 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
1184 | * this unplugging was initiated by libata as indicated by NULL | |
1185 | * dev->sdev, this function doesn't have to do anything. | |
1186 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
1187 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
1188 | * EH. | |
1189 | * | |
1190 | * LOCKING: | |
1191 | * Defined by SCSI layer. We don't really care. | |
1192 | */ | |
1193 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
1194 | { | |
1195 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 1196 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
1197 | unsigned long flags; |
1198 | struct ata_device *dev; | |
1199 | ||
1200 | if (!ap->ops->error_handler) | |
1201 | return; | |
1202 | ||
ba6a1308 | 1203 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
1204 | dev = __ata_scsi_find_dev(ap, sdev); |
1205 | if (dev && dev->sdev) { | |
1206 | /* SCSI device already in CANCEL state, no need to offline it */ | |
1207 | dev->sdev = NULL; | |
1208 | dev->flags |= ATA_DFLAG_DETACH; | |
1209 | ata_port_schedule_eh(ap); | |
1210 | } | |
ba6a1308 | 1211 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
1212 | |
1213 | kfree(q->dma_drain_buffer); | |
1214 | q->dma_drain_buffer = NULL; | |
1215 | q->dma_drain_size = 0; | |
83c47bcb TH |
1216 | } |
1217 | ||
a6e6ce8e TH |
1218 | /** |
1219 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
1220 | * @sdev: SCSI device to configure queue depth for | |
1221 | * @queue_depth: new queue depth | |
e881a172 | 1222 | * @reason: calling context |
a6e6ce8e TH |
1223 | * |
1224 | * This is libata standard hostt->change_queue_depth callback. | |
1225 | * SCSI will call into this callback when user tries to set queue | |
1226 | * depth via sysfs. | |
1227 | * | |
1228 | * LOCKING: | |
1229 | * SCSI layer (we don't care) | |
1230 | * | |
1231 | * RETURNS: | |
1232 | * Newly configured queue depth. | |
1233 | */ | |
e881a172 MC |
1234 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, |
1235 | int reason) | |
a6e6ce8e TH |
1236 | { |
1237 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
1238 | struct ata_device *dev; | |
360f654e | 1239 | unsigned long flags; |
a6e6ce8e | 1240 | |
e881a172 MC |
1241 | if (reason != SCSI_QDEPTH_DEFAULT) |
1242 | return -EOPNOTSUPP; | |
1243 | ||
c3c70c44 | 1244 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
1245 | return sdev->queue_depth; |
1246 | ||
1247 | dev = ata_scsi_find_dev(ap, sdev); | |
1248 | if (!dev || !ata_dev_enabled(dev)) | |
1249 | return sdev->queue_depth; | |
1250 | ||
c3c70c44 | 1251 | /* NCQ enabled? */ |
360f654e | 1252 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
1253 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
1254 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 1255 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
1256 | queue_depth = 1; |
1257 | } | |
360f654e TH |
1258 | spin_unlock_irqrestore(ap->lock, flags); |
1259 | ||
c3c70c44 TH |
1260 | /* limit and apply queue depth */ |
1261 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1262 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1263 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1264 | ||
1265 | if (sdev->queue_depth == queue_depth) | |
1266 | return -EINVAL; | |
1267 | ||
1268 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1269 | return queue_depth; |
1270 | } | |
1271 | ||
972dcafb DG |
1272 | /** |
1273 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1274 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1275 | * |
1276 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1277 | * (to start). Perhaps these commands should be preceded by | |
1278 | * CHECK POWER MODE to see what power mode the device is already in. | |
1279 | * [See SAT revision 5 at www.t10.org] | |
1280 | * | |
1281 | * LOCKING: | |
cca3974e | 1282 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1283 | * |
1284 | * RETURNS: | |
1285 | * Zero on success, non-zero on error. | |
1286 | */ | |
ad706991 | 1287 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1288 | { |
542b1444 | 1289 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1290 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1291 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1292 | |
2e5704f6 TH |
1293 | if (scmd->cmd_len < 5) |
1294 | goto invalid_fld; | |
1295 | ||
972dcafb DG |
1296 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1297 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1298 | if (cdb[1] & 0x1) { |
972dcafb DG |
1299 | ; /* ignore IMMED bit, violates sat-r05 */ |
1300 | } | |
542b1444 | 1301 | if (cdb[4] & 0x2) |
ae006510 | 1302 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1303 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1304 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 | 1305 | |
542b1444 | 1306 | if (cdb[4] & 0x1) { |
972dcafb | 1307 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1308 | |
1309 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1310 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1311 | |
1312 | tf->lbah = 0x0; | |
1313 | tf->lbam = 0x0; | |
1314 | tf->lbal = 0x0; | |
1315 | tf->device |= ATA_LBA; | |
1316 | } else { | |
1317 | /* CHS */ | |
1318 | tf->lbal = 0x1; /* sect */ | |
1319 | tf->lbam = 0x0; /* cyl low */ | |
1320 | tf->lbah = 0x0; /* cyl high */ | |
1321 | } | |
1322 | ||
972dcafb | 1323 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 | 1324 | } else { |
2a6e58d2 RW |
1325 | /* Some odd clown BIOSen issue spindown on power off (ACPI S4 |
1326 | * or S5) causing some drives to spin up and down again. | |
1327 | */ | |
1328 | if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && | |
1329 | system_state == SYSTEM_POWER_OFF) | |
1330 | goto skip; | |
1331 | ||
1332 | if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && | |
1333 | system_entering_hibernation()) | |
1334 | goto skip; | |
1335 | ||
78981a7c RH |
1336 | /* Issue ATA STANDBY IMMEDIATE command */ |
1337 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1338 | } |
78981a7c | 1339 | |
972dcafb DG |
1340 | /* |
1341 | * Standby and Idle condition timers could be implemented but that | |
1342 | * would require libata to implement the Power condition mode page | |
1343 | * and allow the user to change it. Changing mode pages requires | |
1344 | * MODE SELECT to be implemented. | |
1345 | */ | |
1346 | ||
1347 | return 0; | |
ae006510 | 1348 | |
2a6e58d2 | 1349 | invalid_fld: |
542b1444 | 1350 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1351 | /* "Invalid field in cbd" */ |
1352 | return 1; | |
2a6e58d2 RW |
1353 | skip: |
1354 | scmd->result = SAM_STAT_GOOD; | |
1355 | return 1; | |
972dcafb DG |
1356 | } |
1357 | ||
1358 | ||
1da177e4 LT |
1359 | /** |
1360 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1361 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1362 | * |
1363 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1364 | * FLUSH CACHE EXT. | |
1365 | * | |
1366 | * LOCKING: | |
cca3974e | 1367 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1368 | * |
1369 | * RETURNS: | |
1370 | * Zero on success, non-zero on error. | |
1371 | */ | |
ad706991 | 1372 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1373 | { |
1374 | struct ata_taskfile *tf = &qc->tf; | |
1375 | ||
1376 | tf->flags |= ATA_TFLAG_DEVICE; | |
1377 | tf->protocol = ATA_PROT_NODATA; | |
1378 | ||
6fc49adb | 1379 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1380 | tf->command = ATA_CMD_FLUSH_EXT; |
1381 | else | |
1382 | tf->command = ATA_CMD_FLUSH; | |
1383 | ||
b666da35 TH |
1384 | /* flush is critical for IO integrity, consider it an IO command */ |
1385 | qc->flags |= ATA_QCFLAG_IO; | |
1386 | ||
1da177e4 LT |
1387 | return 0; |
1388 | } | |
1389 | ||
3aef5231 AL |
1390 | /** |
1391 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1392 | * @cdb: SCSI command to translate |
3aef5231 AL |
1393 | * |
1394 | * Calculate LBA and transfer length for 6-byte commands. | |
1395 | * | |
1396 | * RETURNS: | |
1397 | * @plba: the LBA | |
1398 | * @plen: the transfer length | |
1399 | */ | |
542b1444 | 1400 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1401 | { |
1402 | u64 lba = 0; | |
6c7b7d2b | 1403 | u32 len; |
3aef5231 AL |
1404 | |
1405 | VPRINTK("six-byte command\n"); | |
1406 | ||
6c7b7d2b | 1407 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1408 | lba |= ((u64)cdb[2]) << 8; |
1409 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1410 | |
6c7b7d2b | 1411 | len = cdb[4]; |
3aef5231 AL |
1412 | |
1413 | *plba = lba; | |
1414 | *plen = len; | |
1415 | } | |
1416 | ||
1417 | /** | |
1418 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1419 | * @cdb: SCSI command to translate |
3aef5231 AL |
1420 | * |
1421 | * Calculate LBA and transfer length for 10-byte commands. | |
1422 | * | |
1423 | * RETURNS: | |
1424 | * @plba: the LBA | |
1425 | * @plen: the transfer length | |
1426 | */ | |
542b1444 | 1427 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1428 | { |
1429 | u64 lba = 0; | |
1430 | u32 len = 0; | |
1431 | ||
1432 | VPRINTK("ten-byte command\n"); | |
1433 | ||
542b1444 TH |
1434 | lba |= ((u64)cdb[2]) << 24; |
1435 | lba |= ((u64)cdb[3]) << 16; | |
1436 | lba |= ((u64)cdb[4]) << 8; | |
1437 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1438 | |
542b1444 TH |
1439 | len |= ((u32)cdb[7]) << 8; |
1440 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1441 | |
1442 | *plba = lba; | |
1443 | *plen = len; | |
1444 | } | |
1445 | ||
1446 | /** | |
1447 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1448 | * @cdb: SCSI command to translate |
3aef5231 AL |
1449 | * |
1450 | * Calculate LBA and transfer length for 16-byte commands. | |
1451 | * | |
1452 | * RETURNS: | |
1453 | * @plba: the LBA | |
1454 | * @plen: the transfer length | |
1455 | */ | |
542b1444 | 1456 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1457 | { |
1458 | u64 lba = 0; | |
1459 | u32 len = 0; | |
1460 | ||
1461 | VPRINTK("sixteen-byte command\n"); | |
1462 | ||
542b1444 TH |
1463 | lba |= ((u64)cdb[2]) << 56; |
1464 | lba |= ((u64)cdb[3]) << 48; | |
1465 | lba |= ((u64)cdb[4]) << 40; | |
1466 | lba |= ((u64)cdb[5]) << 32; | |
1467 | lba |= ((u64)cdb[6]) << 24; | |
1468 | lba |= ((u64)cdb[7]) << 16; | |
1469 | lba |= ((u64)cdb[8]) << 8; | |
1470 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1471 | |
542b1444 TH |
1472 | len |= ((u32)cdb[10]) << 24; |
1473 | len |= ((u32)cdb[11]) << 16; | |
1474 | len |= ((u32)cdb[12]) << 8; | |
1475 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1476 | |
1477 | *plba = lba; | |
1478 | *plen = len; | |
1479 | } | |
1480 | ||
1da177e4 LT |
1481 | /** |
1482 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1483 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1484 | * |
1485 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1486 | * | |
1487 | * LOCKING: | |
cca3974e | 1488 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1489 | * |
1490 | * RETURNS: | |
1491 | * Zero on success, non-zero on error. | |
1492 | */ | |
ad706991 | 1493 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1494 | { |
542b1444 | 1495 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1496 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1497 | struct ata_device *dev = qc->dev; |
1da177e4 | 1498 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1499 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1500 | u64 block; |
1501 | u32 n_block; | |
1da177e4 LT |
1502 | |
1503 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1504 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1505 | |
2e5704f6 TH |
1506 | if (cdb[0] == VERIFY) { |
1507 | if (scmd->cmd_len < 10) | |
1508 | goto invalid_fld; | |
542b1444 | 1509 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1510 | } else if (cdb[0] == VERIFY_16) { |
1511 | if (scmd->cmd_len < 16) | |
1512 | goto invalid_fld; | |
542b1444 | 1513 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1514 | } else |
ae006510 | 1515 | goto invalid_fld; |
1da177e4 | 1516 | |
8bf62ece | 1517 | if (!n_block) |
ae006510 | 1518 | goto nothing_to_do; |
8bf62ece | 1519 | if (block >= dev_sectors) |
ae006510 | 1520 | goto out_of_range; |
8bf62ece | 1521 | if ((block + n_block) > dev_sectors) |
ae006510 | 1522 | goto out_of_range; |
1da177e4 | 1523 | |
07506697 AL |
1524 | if (dev->flags & ATA_DFLAG_LBA) { |
1525 | tf->flags |= ATA_TFLAG_LBA; | |
1526 | ||
c6a33e24 AL |
1527 | if (lba_28_ok(block, n_block)) { |
1528 | /* use LBA28 */ | |
1529 | tf->command = ATA_CMD_VERIFY; | |
1530 | tf->device |= (block >> 24) & 0xf; | |
1531 | } else if (lba_48_ok(block, n_block)) { | |
1532 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1533 | goto out_of_range; | |
07506697 AL |
1534 | |
1535 | /* use LBA48 */ | |
1536 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1537 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1538 | |
8bf62ece | 1539 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1540 | |
8bf62ece AL |
1541 | tf->hob_lbah = (block >> 40) & 0xff; |
1542 | tf->hob_lbam = (block >> 32) & 0xff; | |
1543 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1544 | } else |
1545 | /* request too large even for LBA48 */ | |
1546 | goto out_of_range; | |
8bf62ece AL |
1547 | |
1548 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1549 | |
8bf62ece AL |
1550 | tf->lbah = (block >> 16) & 0xff; |
1551 | tf->lbam = (block >> 8) & 0xff; | |
1552 | tf->lbal = block & 0xff; | |
1da177e4 | 1553 | |
8bf62ece AL |
1554 | tf->device |= ATA_LBA; |
1555 | } else { | |
1556 | /* CHS */ | |
1557 | u32 sect, head, cyl, track; | |
1558 | ||
c6a33e24 AL |
1559 | if (!lba_28_ok(block, n_block)) |
1560 | goto out_of_range; | |
07506697 | 1561 | |
8bf62ece AL |
1562 | /* Convert LBA to CHS */ |
1563 | track = (u32)block / dev->sectors; | |
1564 | cyl = track / dev->heads; | |
1565 | head = track % dev->heads; | |
1566 | sect = (u32)block % dev->sectors + 1; | |
1567 | ||
c187c4b5 AL |
1568 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1569 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1570 | |
1571 | /* Check whether the converted CHS can fit. | |
1572 | Cylinder: 0-65535 | |
8bf62ece AL |
1573 | Head: 0-15 |
1574 | Sector: 1-255*/ | |
2e9edbf8 | 1575 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1576 | goto out_of_range; |
2e9edbf8 | 1577 | |
8bf62ece AL |
1578 | tf->command = ATA_CMD_VERIFY; |
1579 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1580 | tf->lbal = sect; | |
1581 | tf->lbam = cyl; | |
1582 | tf->lbah = cyl >> 8; | |
1583 | tf->device |= head; | |
1584 | } | |
1da177e4 LT |
1585 | |
1586 | return 0; | |
ae006510 DG |
1587 | |
1588 | invalid_fld: | |
542b1444 | 1589 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1590 | /* "Invalid field in cbd" */ |
1591 | return 1; | |
1592 | ||
1593 | out_of_range: | |
542b1444 | 1594 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1595 | /* "Logical Block Address out of range" */ |
1596 | return 1; | |
1597 | ||
1598 | nothing_to_do: | |
542b1444 | 1599 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1600 | return 1; |
1da177e4 LT |
1601 | } |
1602 | ||
1603 | /** | |
1604 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1605 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1606 | * |
1607 | * Converts any of six SCSI read/write commands into the | |
1608 | * ATA counterpart, including starting sector (LBA), | |
1609 | * sector count, and taking into account the device's LBA48 | |
1610 | * support. | |
1611 | * | |
1612 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1613 | * %WRITE_16 are currently supported. | |
1614 | * | |
1615 | * LOCKING: | |
cca3974e | 1616 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1617 | * |
1618 | * RETURNS: | |
1619 | * Zero on success, non-zero on error. | |
1620 | */ | |
ad706991 | 1621 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1622 | { |
542b1444 | 1623 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1624 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1625 | unsigned int tf_flags = 0; |
3aef5231 AL |
1626 | u64 block; |
1627 | u32 n_block; | |
bd056d7e | 1628 | int rc; |
1da177e4 | 1629 | |
542b1444 | 1630 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1631 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1632 | |
9a3dccc4 | 1633 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1634 | switch (cdb[0]) { |
3aef5231 AL |
1635 | case READ_10: |
1636 | case WRITE_10: | |
2e5704f6 TH |
1637 | if (unlikely(scmd->cmd_len < 10)) |
1638 | goto invalid_fld; | |
542b1444 TH |
1639 | scsi_10_lba_len(cdb, &block, &n_block); |
1640 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1641 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1642 | break; |
1643 | case READ_6: | |
1644 | case WRITE_6: | |
2e5704f6 TH |
1645 | if (unlikely(scmd->cmd_len < 6)) |
1646 | goto invalid_fld; | |
542b1444 | 1647 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1648 | |
1649 | /* for 6-byte r/w commands, transfer length 0 | |
1650 | * means 256 blocks of data, not 0 block. | |
1651 | */ | |
76b2bf9b JG |
1652 | if (!n_block) |
1653 | n_block = 256; | |
3aef5231 AL |
1654 | break; |
1655 | case READ_16: | |
1656 | case WRITE_16: | |
2e5704f6 TH |
1657 | if (unlikely(scmd->cmd_len < 16)) |
1658 | goto invalid_fld; | |
542b1444 TH |
1659 | scsi_16_lba_len(cdb, &block, &n_block); |
1660 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1661 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1662 | break; |
1663 | default: | |
8bf62ece | 1664 | DPRINTK("no-byte command\n"); |
ae006510 | 1665 | goto invalid_fld; |
1da177e4 LT |
1666 | } |
1667 | ||
8bf62ece AL |
1668 | /* Check and compose ATA command */ |
1669 | if (!n_block) | |
c187c4b5 AL |
1670 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1671 | * length 0 means transfer 0 block of data. | |
1672 | * However, for ATA R/W commands, sector count 0 means | |
1673 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1674 | * |
1675 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1676 | */ |
ae006510 | 1677 | goto nothing_to_do; |
1da177e4 | 1678 | |
bd056d7e | 1679 | qc->flags |= ATA_QCFLAG_IO; |
295124dc | 1680 | qc->nbytes = n_block * scmd->device->sector_size; |
1da177e4 | 1681 | |
bd056d7e TH |
1682 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1683 | qc->tag); | |
1684 | if (likely(rc == 0)) | |
1685 | return 0; | |
ae006510 | 1686 | |
bd056d7e TH |
1687 | if (rc == -ERANGE) |
1688 | goto out_of_range; | |
1689 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1690 | invalid_fld: |
542b1444 | 1691 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1692 | /* "Invalid field in cbd" */ |
1693 | return 1; | |
1694 | ||
1695 | out_of_range: | |
542b1444 | 1696 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1697 | /* "Logical Block Address out of range" */ |
1698 | return 1; | |
1699 | ||
1700 | nothing_to_do: | |
542b1444 | 1701 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1702 | return 1; |
1da177e4 LT |
1703 | } |
1704 | ||
77853bf2 | 1705 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1706 | { |
c31f571d | 1707 | struct ata_port *ap = qc->ap; |
1da177e4 | 1708 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1709 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1710 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1711 | |
1712 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1713 | * user mandated it or if there's an error. Note that if we | |
1714 | * generate because the user forced us to, a check condition | |
1715 | * is generated and the ATA register values are returned | |
1716 | * whether the command completed successfully or not. If there | |
1717 | * was no error, SK, ASC and ASCQ will all be zero. | |
1718 | */ | |
a7dac447 | 1719 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1720 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1721 | ata_gen_passthru_sense(qc); |
b095518e JG |
1722 | } else { |
1723 | if (!need_sense) { | |
1724 | cmd->result = SAM_STAT_GOOD; | |
1725 | } else { | |
1726 | /* TODO: decide which descriptor format to use | |
1727 | * for 48b LBA devices and call that here | |
1728 | * instead of the fixed desc, which is only | |
1729 | * good for smaller LBA (and maybe CHS?) | |
1730 | * devices. | |
1731 | */ | |
750426aa | 1732 | ata_gen_ata_sense(qc); |
b095518e JG |
1733 | } |
1734 | } | |
1da177e4 | 1735 | |
c31f571d | 1736 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1737 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1738 | |
1739 | qc->scsidone(cmd); | |
1740 | ||
77853bf2 | 1741 | ata_qc_free(qc); |
1da177e4 LT |
1742 | } |
1743 | ||
1744 | /** | |
1745 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1746 | * @dev: ATA device to which the command is addressed |
1747 | * @cmd: SCSI command to execute | |
1da177e4 LT |
1748 | * @xlat_func: Actor which translates @cmd to an ATA taskfile |
1749 | * | |
1750 | * Our ->queuecommand() function has decided that the SCSI | |
1751 | * command issued can be directly translated into an ATA | |
1752 | * command, rather than handled internally. | |
1753 | * | |
1754 | * This function sets up an ata_queued_cmd structure for the | |
1755 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1756 | * | |
ae006510 DG |
1757 | * The xlat_func argument (actor) returns 0 if ready to execute |
1758 | * ATA command, else 1 to finish translation. If 1 is returned | |
1759 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1760 | * to be set reflecting an error condition or clean (early) | |
1761 | * termination. | |
1762 | * | |
1da177e4 | 1763 | * LOCKING: |
cca3974e | 1764 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1765 | * |
1766 | * RETURNS: | |
1767 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1768 | * needs to be deferred. | |
1da177e4 | 1769 | */ |
2115ea94 | 1770 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
2115ea94 | 1771 | ata_xlat_func_t xlat_func) |
1da177e4 | 1772 | { |
31cc23b3 | 1773 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1774 | struct ata_queued_cmd *qc; |
31cc23b3 | 1775 | int rc; |
1da177e4 LT |
1776 | |
1777 | VPRINTK("ENTER\n"); | |
1778 | ||
b27dcfb0 | 1779 | qc = ata_scsi_qc_new(dev, cmd); |
1da177e4 | 1780 | if (!qc) |
ae006510 | 1781 | goto err_mem; |
1da177e4 LT |
1782 | |
1783 | /* data is present; dma-map it */ | |
be7db055 | 1784 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1785 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1786 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1787 | ata_dev_printk(dev, KERN_WARNING, |
1788 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1789 | goto err_did; |
1da177e4 LT |
1790 | } |
1791 | ||
7120165c | 1792 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1793 | |
1794 | qc->dma_dir = cmd->sc_data_direction; | |
1795 | } | |
1796 | ||
1797 | qc->complete_fn = ata_scsi_qc_complete; | |
1798 | ||
ad706991 | 1799 | if (xlat_func(qc)) |
ae006510 | 1800 | goto early_finish; |
1da177e4 | 1801 | |
31cc23b3 TH |
1802 | if (ap->ops->qc_defer) { |
1803 | if ((rc = ap->ops->qc_defer(qc))) | |
1804 | goto defer; | |
1805 | } | |
1806 | ||
1da177e4 | 1807 | /* select device, send command to hardware */ |
8e0e694a | 1808 | ata_qc_issue(qc); |
1da177e4 LT |
1809 | |
1810 | VPRINTK("EXIT\n"); | |
2115ea94 | 1811 | return 0; |
1da177e4 | 1812 | |
ae006510 | 1813 | early_finish: |
2dcb407e | 1814 | ata_qc_free(qc); |
b27dcfb0 | 1815 | cmd->scsi_done(cmd); |
ae006510 | 1816 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1817 | return 0; |
ae006510 DG |
1818 | |
1819 | err_did: | |
1da177e4 | 1820 | ata_qc_free(qc); |
ae006510 | 1821 | cmd->result = (DID_ERROR << 16); |
b27dcfb0 | 1822 | cmd->scsi_done(cmd); |
253b92ec | 1823 | err_mem: |
ae006510 | 1824 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1825 | return 0; |
3dc1d881 TH |
1826 | |
1827 | defer: | |
31cc23b3 | 1828 | ata_qc_free(qc); |
3dc1d881 | 1829 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1830 | if (rc == ATA_DEFER_LINK) |
1831 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1832 | else | |
1833 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1834 | } |
1835 | ||
1836 | /** | |
1837 | * ata_scsi_rbuf_get - Map response buffer. | |
ec2a20e6 | 1838 | * @cmd: SCSI command containing buffer to be mapped. |
87340e98 TH |
1839 | * @flags: unsigned long variable to store irq enable status |
1840 | * @copy_in: copy in from user buffer | |
1da177e4 | 1841 | * |
87340e98 | 1842 | * Prepare buffer for simulated SCSI commands. |
1da177e4 LT |
1843 | * |
1844 | * LOCKING: | |
87340e98 | 1845 | * spin_lock_irqsave(ata_scsi_rbuf_lock) on success |
1da177e4 LT |
1846 | * |
1847 | * RETURNS: | |
87340e98 | 1848 | * Pointer to response buffer. |
1da177e4 | 1849 | */ |
87340e98 TH |
1850 | static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, |
1851 | unsigned long *flags) | |
1da177e4 | 1852 | { |
87340e98 | 1853 | spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); |
1da177e4 | 1854 | |
87340e98 TH |
1855 | memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); |
1856 | if (copy_in) | |
1857 | sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1858 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1859 | return ata_scsi_rbuf; | |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | /** | |
1863 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1864 | * @cmd: SCSI command containing buffer to be unmapped. | |
87340e98 TH |
1865 | * @copy_out: copy out result |
1866 | * @flags: @flags passed to ata_scsi_rbuf_get() | |
1da177e4 | 1867 | * |
87340e98 TH |
1868 | * Returns rbuf buffer. The result is copied to @cmd's buffer if |
1869 | * @copy_back is true. | |
1da177e4 LT |
1870 | * |
1871 | * LOCKING: | |
87340e98 | 1872 | * Unlocks ata_scsi_rbuf_lock. |
1da177e4 | 1873 | */ |
87340e98 TH |
1874 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, |
1875 | unsigned long *flags) | |
1da177e4 | 1876 | { |
87340e98 TH |
1877 | if (copy_out) |
1878 | sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1879 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1880 | spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); | |
1da177e4 LT |
1881 | } |
1882 | ||
1883 | /** | |
1884 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1885 | * @args: device IDENTIFY data / SCSI command of interest. | |
1886 | * @actor: Callback hook for desired SCSI command simulator | |
1887 | * | |
1888 | * Takes care of the hard work of simulating a SCSI command... | |
1889 | * Mapping the response buffer, calling the command's handler, | |
1890 | * and handling the handler's return value. This return value | |
1891 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1892 | * completed successfully (0), or not (in which case cmd->result |
1893 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1894 | * |
1895 | * LOCKING: | |
cca3974e | 1896 | * spin_lock_irqsave(host lock) |
1da177e4 | 1897 | */ |
f0761be3 | 1898 | static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, |
87340e98 | 1899 | unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) |
1da177e4 LT |
1900 | { |
1901 | u8 *rbuf; | |
87340e98 | 1902 | unsigned int rc; |
1da177e4 | 1903 | struct scsi_cmnd *cmd = args->cmd; |
b445c568 JG |
1904 | unsigned long flags; |
1905 | ||
87340e98 TH |
1906 | rbuf = ata_scsi_rbuf_get(cmd, false, &flags); |
1907 | rc = actor(args, rbuf); | |
1908 | ata_scsi_rbuf_put(cmd, rc == 0, &flags); | |
b445c568 | 1909 | |
ae006510 | 1910 | if (rc == 0) |
1da177e4 | 1911 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1912 | args->done(cmd); |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | /** | |
1916 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1917 | * @args: device IDENTIFY data / SCSI command of interest. | |
1918 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1919 | * |
1920 | * Returns standard device identification data associated | |
b142eb65 | 1921 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1922 | * |
1923 | * LOCKING: | |
cca3974e | 1924 | * spin_lock_irqsave(host lock) |
1da177e4 | 1925 | */ |
87340e98 | 1926 | static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 1927 | { |
87340e98 TH |
1928 | const u8 versions[] = { |
1929 | 0x60, /* SAM-3 (no version claimed) */ | |
1930 | ||
1931 | 0x03, | |
1932 | 0x20, /* SBC-2 (no version claimed) */ | |
1933 | ||
1934 | 0x02, | |
1935 | 0x60 /* SPC-3 (no version claimed) */ | |
1936 | }; | |
1da177e4 LT |
1937 | u8 hdr[] = { |
1938 | TYPE_DISK, | |
1939 | 0, | |
1940 | 0x5, /* claim SPC-3 version compatibility */ | |
1941 | 2, | |
1942 | 95 - 4 | |
1943 | }; | |
1944 | ||
87340e98 TH |
1945 | VPRINTK("ENTER\n"); |
1946 | ||
1da177e4 LT |
1947 | /* set scsi removeable (RMB) bit per ata bit */ |
1948 | if (ata_id_removeable(args->id)) | |
1949 | hdr[1] |= (1 << 7); | |
1950 | ||
1da177e4 | 1951 | memcpy(rbuf, hdr, sizeof(hdr)); |
87340e98 TH |
1952 | memcpy(&rbuf[8], "ATA ", 8); |
1953 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); | |
1954 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 | 1955 | |
87340e98 TH |
1956 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1957 | memcpy(&rbuf[32], "n/a ", 4); | |
1da177e4 | 1958 | |
87340e98 | 1959 | memcpy(rbuf + 59, versions, sizeof(versions)); |
1da177e4 LT |
1960 | |
1961 | return 0; | |
1962 | } | |
1963 | ||
1964 | /** | |
b142eb65 | 1965 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1966 | * @args: device IDENTIFY data / SCSI command of interest. |
1967 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 1968 | * |
b142eb65 | 1969 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1970 | * |
1971 | * LOCKING: | |
cca3974e | 1972 | * spin_lock_irqsave(host lock) |
1da177e4 | 1973 | */ |
87340e98 | 1974 | static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
1975 | { |
1976 | const u8 pages[] = { | |
1977 | 0x00, /* page 0x00, this page */ | |
1978 | 0x80, /* page 0x80, unit serial no page */ | |
1e9dbc92 MW |
1979 | 0x83, /* page 0x83, device ident page */ |
1980 | 0x89, /* page 0x89, ata info page */ | |
18f0f978 | 1981 | 0xb0, /* page 0xb0, block limits page */ |
1e9dbc92 | 1982 | 0xb1, /* page 0xb1, block device characteristics page */ |
02e0a604 | 1983 | 0xb2, /* page 0xb2, thin provisioning page */ |
1da177e4 | 1984 | }; |
1da177e4 | 1985 | |
87340e98 TH |
1986 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1987 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1da177e4 LT |
1988 | return 0; |
1989 | } | |
1990 | ||
1991 | /** | |
b142eb65 | 1992 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1993 | * @args: device IDENTIFY data / SCSI command of interest. |
1994 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1995 | * |
1996 | * Returns ATA device serial number. | |
1997 | * | |
1998 | * LOCKING: | |
cca3974e | 1999 | * spin_lock_irqsave(host lock) |
1da177e4 | 2000 | */ |
87340e98 | 2001 | static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2002 | { |
2003 | const u8 hdr[] = { | |
2004 | 0, | |
2005 | 0x80, /* this page code */ | |
2006 | 0, | |
a0cf733b | 2007 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 | 2008 | }; |
1da177e4 | 2009 | |
87340e98 TH |
2010 | memcpy(rbuf, hdr, sizeof(hdr)); |
2011 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
2012 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1da177e4 LT |
2013 | return 0; |
2014 | } | |
2015 | ||
1da177e4 | 2016 | /** |
b142eb65 | 2017 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
2018 | * @args: device IDENTIFY data / SCSI command of interest. |
2019 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2020 | * |
b142eb65 JG |
2021 | * Yields two logical unit device identification designators: |
2022 | * - vendor specific ASCII containing the ATA serial number | |
2023 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
2024 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
2025 | * |
2026 | * LOCKING: | |
cca3974e | 2027 | * spin_lock_irqsave(host lock) |
1da177e4 | 2028 | */ |
87340e98 | 2029 | static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2030 | { |
b142eb65 | 2031 | const int sat_model_serial_desc_len = 68; |
87340e98 | 2032 | int num; |
1da177e4 | 2033 | |
b142eb65 JG |
2034 | rbuf[1] = 0x83; /* this page code */ |
2035 | num = 4; | |
2036 | ||
87340e98 TH |
2037 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2038 | rbuf[num + 0] = 2; | |
2039 | rbuf[num + 3] = ATA_ID_SERNO_LEN; | |
2040 | num += 4; | |
2041 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
2042 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
2043 | num += ATA_ID_SERNO_LEN; | |
2044 | ||
2045 | /* SAT defined lu model and serial numbers descriptor */ | |
2046 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2047 | rbuf[num + 0] = 2; | |
2048 | rbuf[num + 1] = 1; | |
2049 | rbuf[num + 3] = sat_model_serial_desc_len; | |
2050 | num += 4; | |
2051 | memcpy(rbuf + num, "ATA ", 8); | |
2052 | num += 8; | |
2053 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, | |
2054 | ATA_ID_PROD_LEN); | |
2055 | num += ATA_ID_PROD_LEN; | |
2056 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, | |
2057 | ATA_ID_SERNO_LEN); | |
2058 | num += ATA_ID_SERNO_LEN; | |
2059 | ||
6b3b9d73 HR |
2060 | if (ata_id_has_wwn(args->id)) { |
2061 | /* SAT defined lu world wide name */ | |
2062 | /* piv=0, assoc=lu, code_set=binary, designator=NAA */ | |
2063 | rbuf[num + 0] = 1; | |
2064 | rbuf[num + 1] = 3; | |
2065 | rbuf[num + 3] = ATA_ID_WWN_LEN; | |
2066 | num += 4; | |
2067 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
2068 | ATA_ID_WWN, ATA_ID_WWN_LEN); | |
2069 | num += ATA_ID_WWN_LEN; | |
2070 | } | |
b142eb65 | 2071 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ |
1da177e4 LT |
2072 | return 0; |
2073 | } | |
2074 | ||
ad355b46 JG |
2075 | /** |
2076 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
2077 | * @args: device IDENTIFY data / SCSI command of interest. | |
2078 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
ad355b46 JG |
2079 | * |
2080 | * Yields SAT-specified ATA VPD page. | |
2081 | * | |
2082 | * LOCKING: | |
2083 | * spin_lock_irqsave(host lock) | |
2084 | */ | |
87340e98 | 2085 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) |
ad355b46 | 2086 | { |
ad355b46 | 2087 | struct ata_taskfile tf; |
ad355b46 | 2088 | |
ad355b46 JG |
2089 | memset(&tf, 0, sizeof(tf)); |
2090 | ||
87340e98 TH |
2091 | rbuf[1] = 0x89; /* our page code */ |
2092 | rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
2093 | rbuf[3] = (0x238 & 0xff); | |
ad355b46 | 2094 | |
87340e98 TH |
2095 | memcpy(&rbuf[8], "linux ", 8); |
2096 | memcpy(&rbuf[16], "libata ", 16); | |
2097 | memcpy(&rbuf[32], DRV_VERSION, 4); | |
2098 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
ad355b46 JG |
2099 | |
2100 | /* we don't store the ATA device signature, so we fake it */ | |
2101 | ||
2102 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
2103 | tf.lbal = 0x1; | |
2104 | tf.nsect = 0x1; | |
2105 | ||
87340e98 TH |
2106 | ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ |
2107 | rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
ad355b46 | 2108 | |
87340e98 | 2109 | rbuf[56] = ATA_CMD_ID_ATA; |
ad355b46 | 2110 | |
87340e98 | 2111 | memcpy(&rbuf[60], &args->id[0], 512); |
ad355b46 JG |
2112 | return 0; |
2113 | } | |
2114 | ||
18f0f978 CH |
2115 | static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) |
2116 | { | |
295124dc | 2117 | u16 min_io_sectors; |
18f0f978 CH |
2118 | |
2119 | rbuf[1] = 0xb0; | |
2120 | rbuf[3] = 0x3c; /* required VPD size with unmap support */ | |
2121 | ||
2122 | /* | |
2123 | * Optimal transfer length granularity. | |
2124 | * | |
2125 | * This is always one physical block, but for disks with a smaller | |
2126 | * logical than physical sector size we need to figure out what the | |
2127 | * latter is. | |
2128 | */ | |
295124dc | 2129 | min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); |
18f0f978 CH |
2130 | put_unaligned_be16(min_io_sectors, &rbuf[6]); |
2131 | ||
2132 | /* | |
2133 | * Optimal unmap granularity. | |
2134 | * | |
2135 | * The ATA spec doesn't even know about a granularity or alignment | |
2136 | * for the TRIM command. We can leave away most of the unmap related | |
2137 | * VPD page entries, but we have specifify a granularity to signal | |
2138 | * that we support some form of unmap - in thise case via WRITE SAME | |
2139 | * with the unmap bit set. | |
2140 | */ | |
e78db4df | 2141 | if (ata_id_has_trim(args->id)) { |
5f4e2066 | 2142 | put_unaligned_be64(65535 * 512 / 8, &rbuf[36]); |
18f0f978 | 2143 | put_unaligned_be32(1, &rbuf[28]); |
e78db4df | 2144 | } |
18f0f978 CH |
2145 | |
2146 | return 0; | |
2147 | } | |
2148 | ||
1e9dbc92 MW |
2149 | static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) |
2150 | { | |
4bca3286 MP |
2151 | int form_factor = ata_id_form_factor(args->id); |
2152 | int media_rotation_rate = ata_id_rotation_rate(args->id); | |
2153 | ||
1e9dbc92 MW |
2154 | rbuf[1] = 0xb1; |
2155 | rbuf[3] = 0x3c; | |
4bca3286 MP |
2156 | rbuf[4] = media_rotation_rate >> 8; |
2157 | rbuf[5] = media_rotation_rate; | |
2158 | rbuf[7] = form_factor; | |
1e9dbc92 MW |
2159 | |
2160 | return 0; | |
2161 | } | |
2162 | ||
02e0a604 MP |
2163 | static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) |
2164 | { | |
2165 | /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ | |
2166 | rbuf[1] = 0xb2; | |
2167 | rbuf[3] = 0x4; | |
2168 | rbuf[5] = 1 << 6; /* TPWS */ | |
2169 | ||
2170 | return 0; | |
2171 | } | |
2172 | ||
1da177e4 | 2173 | /** |
0cba632b | 2174 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
2175 | * @args: device IDENTIFY data / SCSI command of interest. |
2176 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2177 | * |
2178 | * No operation. Simply returns success to caller, to indicate | |
2179 | * that the caller should successfully complete this SCSI command. | |
2180 | * | |
2181 | * LOCKING: | |
cca3974e | 2182 | * spin_lock_irqsave(host lock) |
1da177e4 | 2183 | */ |
87340e98 | 2184 | static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2185 | { |
2186 | VPRINTK("ENTER\n"); | |
2187 | return 0; | |
2188 | } | |
2189 | ||
1da177e4 LT |
2190 | /** |
2191 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2192 | * @id: device IDENTIFY data | |
87340e98 | 2193 | * @buf: output buffer |
1da177e4 LT |
2194 | * |
2195 | * Generate a caching info page, which conditionally indicates | |
2196 | * write caching to the SCSI layer, depending on device | |
2197 | * capabilities. | |
2198 | * | |
2199 | * LOCKING: | |
2200 | * None. | |
2201 | */ | |
87340e98 | 2202 | static unsigned int ata_msense_caching(u16 *id, u8 *buf) |
1da177e4 | 2203 | { |
87340e98 | 2204 | memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); |
1da177e4 | 2205 | if (ata_id_wcache_enabled(id)) |
87340e98 | 2206 | buf[2] |= (1 << 2); /* write cache enable */ |
1da177e4 | 2207 | if (!ata_id_rahead_enabled(id)) |
87340e98 TH |
2208 | buf[12] |= (1 << 5); /* disable read ahead */ |
2209 | return sizeof(def_cache_mpage); | |
1da177e4 LT |
2210 | } |
2211 | ||
2212 | /** | |
2213 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
87340e98 | 2214 | * @buf: output buffer |
1da177e4 LT |
2215 | * |
2216 | * Generate a generic MODE SENSE control mode page. | |
2217 | * | |
2218 | * LOCKING: | |
2219 | * None. | |
2220 | */ | |
87340e98 | 2221 | static unsigned int ata_msense_ctl_mode(u8 *buf) |
1da177e4 | 2222 | { |
87340e98 | 2223 | memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); |
00ac37f5 | 2224 | return sizeof(def_control_mpage); |
1da177e4 LT |
2225 | } |
2226 | ||
2227 | /** | |
2228 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
ec2a20e6 | 2229 | * @buf: output buffer |
1da177e4 LT |
2230 | * |
2231 | * Generate a generic MODE SENSE r/w error recovery page. | |
2232 | * | |
2233 | * LOCKING: | |
2234 | * None. | |
2235 | */ | |
87340e98 | 2236 | static unsigned int ata_msense_rw_recovery(u8 *buf) |
1da177e4 | 2237 | { |
87340e98 | 2238 | memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); |
00ac37f5 | 2239 | return sizeof(def_rw_recovery_mpage); |
1da177e4 LT |
2240 | } |
2241 | ||
48bdc8ec JA |
2242 | /* |
2243 | * We can turn this into a real blacklist if it's needed, for now just | |
2244 | * blacklist any Maxtor BANC1G10 revision firmware | |
2245 | */ | |
2246 | static int ata_dev_supports_fua(u16 *id) | |
2247 | { | |
a0cf733b | 2248 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2249 | |
c3c013a2 JG |
2250 | if (!libata_fua) |
2251 | return 0; | |
48bdc8ec JA |
2252 | if (!ata_id_has_fua(id)) |
2253 | return 0; | |
2254 | ||
a0cf733b TH |
2255 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2256 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2257 | |
2e02671d | 2258 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2259 | return 1; |
2e02671d | 2260 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2261 | return 1; |
2262 | ||
2263 | return 0; /* blacklisted */ | |
2264 | } | |
2265 | ||
1da177e4 LT |
2266 | /** |
2267 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2268 | * @args: device IDENTIFY data / SCSI command of interest. | |
2269 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2270 | * |
00ac37f5 DG |
2271 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2272 | * access devices (e.g. disks) only. There should be no block | |
2273 | * descriptor for other device types. | |
1da177e4 LT |
2274 | * |
2275 | * LOCKING: | |
cca3974e | 2276 | * spin_lock_irqsave(host lock) |
1da177e4 | 2277 | */ |
87340e98 | 2278 | static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2279 | { |
9a3dccc4 | 2280 | struct ata_device *dev = args->dev; |
87340e98 | 2281 | u8 *scsicmd = args->cmd->cmnd, *p = rbuf; |
00ac37f5 DG |
2282 | const u8 sat_blk_desc[] = { |
2283 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2284 | 0, | |
2285 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2286 | }; | |
2287 | u8 pg, spg; | |
87340e98 | 2288 | unsigned int ebd, page_control, six_byte; |
9a3dccc4 | 2289 | u8 dpofua; |
1da177e4 LT |
2290 | |
2291 | VPRINTK("ENTER\n"); | |
2292 | ||
2293 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2294 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2295 | /* | |
2296 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2297 | */ |
00ac37f5 | 2298 | |
1da177e4 | 2299 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2300 | switch (page_control) { |
2301 | case 0: /* current */ | |
2302 | break; /* supported */ | |
2303 | case 3: /* saved */ | |
2304 | goto saving_not_supp; | |
2305 | case 1: /* changeable */ | |
2306 | case 2: /* defaults */ | |
2307 | default: | |
2308 | goto invalid_fld; | |
2309 | } | |
1da177e4 | 2310 | |
87340e98 TH |
2311 | if (six_byte) |
2312 | p += 4 + (ebd ? 8 : 0); | |
2313 | else | |
2314 | p += 8 + (ebd ? 8 : 0); | |
1da177e4 | 2315 | |
00ac37f5 DG |
2316 | pg = scsicmd[2] & 0x3f; |
2317 | spg = scsicmd[3]; | |
2318 | /* | |
2319 | * No mode subpages supported (yet) but asking for _all_ | |
2320 | * subpages may be valid | |
2321 | */ | |
2322 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2323 | goto invalid_fld; | |
2324 | ||
2325 | switch(pg) { | |
2326 | case RW_RECOVERY_MPAGE: | |
87340e98 | 2327 | p += ata_msense_rw_recovery(p); |
1da177e4 LT |
2328 | break; |
2329 | ||
00ac37f5 | 2330 | case CACHE_MPAGE: |
87340e98 | 2331 | p += ata_msense_caching(args->id, p); |
1da177e4 LT |
2332 | break; |
2333 | ||
87340e98 TH |
2334 | case CONTROL_MPAGE: |
2335 | p += ata_msense_ctl_mode(p); | |
1da177e4 | 2336 | break; |
1da177e4 | 2337 | |
00ac37f5 | 2338 | case ALL_MPAGES: |
87340e98 TH |
2339 | p += ata_msense_rw_recovery(p); |
2340 | p += ata_msense_caching(args->id, p); | |
2341 | p += ata_msense_ctl_mode(p); | |
1da177e4 LT |
2342 | break; |
2343 | ||
2344 | default: /* invalid page code */ | |
ae006510 | 2345 | goto invalid_fld; |
1da177e4 LT |
2346 | } |
2347 | ||
9a3dccc4 | 2348 | dpofua = 0; |
f79d409f | 2349 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2350 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2351 | dpofua = 1 << 4; | |
2352 | ||
1da177e4 | 2353 | if (six_byte) { |
87340e98 TH |
2354 | rbuf[0] = p - rbuf - 1; |
2355 | rbuf[2] |= dpofua; | |
00ac37f5 | 2356 | if (ebd) { |
87340e98 TH |
2357 | rbuf[3] = sizeof(sat_blk_desc); |
2358 | memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2359 | } |
1da177e4 | 2360 | } else { |
87340e98 TH |
2361 | unsigned int output_len = p - rbuf - 2; |
2362 | ||
1da177e4 | 2363 | rbuf[0] = output_len >> 8; |
87340e98 TH |
2364 | rbuf[1] = output_len; |
2365 | rbuf[3] |= dpofua; | |
00ac37f5 | 2366 | if (ebd) { |
87340e98 TH |
2367 | rbuf[7] = sizeof(sat_blk_desc); |
2368 | memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2369 | } |
1da177e4 | 2370 | } |
1da177e4 | 2371 | return 0; |
ae006510 DG |
2372 | |
2373 | invalid_fld: | |
2374 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2375 | /* "Invalid field in cbd" */ | |
2376 | return 1; | |
2377 | ||
2378 | saving_not_supp: | |
2379 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2380 | /* "Saving parameters not supported" */ | |
2381 | return 1; | |
1da177e4 LT |
2382 | } |
2383 | ||
2384 | /** | |
2385 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2386 | * @args: device IDENTIFY data / SCSI command of interest. | |
2387 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2388 | * |
2389 | * Simulate READ CAPACITY commands. | |
2390 | * | |
2391 | * LOCKING: | |
6a36261e | 2392 | * None. |
1da177e4 | 2393 | */ |
87340e98 | 2394 | static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2395 | { |
61d79a8e MP |
2396 | struct ata_device *dev = args->dev; |
2397 | u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ | |
295124dc GG |
2398 | u32 sector_size; /* physical sector size in bytes */ |
2399 | u8 log2_per_phys; | |
2400 | u16 lowest_aligned; | |
2401 | ||
2402 | sector_size = ata_id_logical_sector_size(dev->id); | |
2403 | log2_per_phys = ata_id_log2_per_physical_sector(dev->id); | |
2404 | lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); | |
1da177e4 LT |
2405 | |
2406 | VPRINTK("ENTER\n"); | |
2407 | ||
1da177e4 | 2408 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2409 | if (last_lba >= 0xffffffffULL) |
2410 | last_lba = 0xffffffff; | |
0c144d0d | 2411 | |
1da177e4 | 2412 | /* sector count, 32-bit */ |
87340e98 TH |
2413 | rbuf[0] = last_lba >> (8 * 3); |
2414 | rbuf[1] = last_lba >> (8 * 2); | |
2415 | rbuf[2] = last_lba >> (8 * 1); | |
2416 | rbuf[3] = last_lba; | |
1da177e4 LT |
2417 | |
2418 | /* sector size */ | |
295124dc GG |
2419 | rbuf[4] = sector_size >> (8 * 3); |
2420 | rbuf[5] = sector_size >> (8 * 2); | |
2421 | rbuf[6] = sector_size >> (8 * 1); | |
2422 | rbuf[7] = sector_size; | |
1da177e4 LT |
2423 | } else { |
2424 | /* sector count, 64-bit */ | |
87340e98 TH |
2425 | rbuf[0] = last_lba >> (8 * 7); |
2426 | rbuf[1] = last_lba >> (8 * 6); | |
2427 | rbuf[2] = last_lba >> (8 * 5); | |
2428 | rbuf[3] = last_lba >> (8 * 4); | |
2429 | rbuf[4] = last_lba >> (8 * 3); | |
2430 | rbuf[5] = last_lba >> (8 * 2); | |
2431 | rbuf[6] = last_lba >> (8 * 1); | |
2432 | rbuf[7] = last_lba; | |
1da177e4 LT |
2433 | |
2434 | /* sector size */ | |
295124dc GG |
2435 | rbuf[ 8] = sector_size >> (8 * 3); |
2436 | rbuf[ 9] = sector_size >> (8 * 2); | |
2437 | rbuf[10] = sector_size >> (8 * 1); | |
2438 | rbuf[11] = sector_size; | |
61d79a8e MP |
2439 | |
2440 | rbuf[12] = 0; | |
295124dc | 2441 | rbuf[13] = log2_per_phys; |
61d79a8e MP |
2442 | rbuf[14] = (lowest_aligned >> 8) & 0x3f; |
2443 | rbuf[15] = lowest_aligned; | |
18f0f978 | 2444 | |
e78db4df MP |
2445 | if (ata_id_has_trim(args->id)) { |
2446 | rbuf[14] |= 0x80; /* TPE */ | |
2447 | ||
2448 | if (ata_id_has_zero_after_trim(args->id)) | |
2449 | rbuf[14] |= 0x40; /* TPRZ */ | |
2450 | } | |
1da177e4 LT |
2451 | } |
2452 | ||
2453 | return 0; | |
2454 | } | |
2455 | ||
2456 | /** | |
2457 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2458 | * @args: device IDENTIFY data / SCSI command of interest. | |
2459 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2460 | * |
2461 | * Simulate REPORT LUNS command. | |
2462 | * | |
2463 | * LOCKING: | |
cca3974e | 2464 | * spin_lock_irqsave(host lock) |
1da177e4 | 2465 | */ |
87340e98 | 2466 | static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2467 | { |
2468 | VPRINTK("ENTER\n"); | |
2469 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2470 | ||
2471 | return 0; | |
2472 | } | |
2473 | ||
77853bf2 | 2474 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2475 | { |
74e6c8c3 | 2476 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2477 | /* FIXME: not quite right; we don't want the |
2478 | * translation of taskfile registers into | |
2479 | * a sense descriptors, since that's only | |
2480 | * correct for ATA, not ATAPI | |
2481 | */ | |
750426aa | 2482 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2483 | } |
a939c963 | 2484 | |
c6e6e666 | 2485 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2486 | ata_qc_free(qc); |
c6e6e666 | 2487 | } |
a939c963 | 2488 | |
c6e6e666 JG |
2489 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2490 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2491 | { | |
2492 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2493 | } | |
2494 | ||
2495 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2496 | { | |
2497 | struct ata_port *ap = qc->ap; | |
2498 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2499 | ||
2500 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2501 | |
2502 | /* FIXME: is this needed? */ | |
7ccd720d | 2503 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2504 | |
127102ae | 2505 | #ifdef CONFIG_ATA_SFF |
855d854a JB |
2506 | if (ap->ops->sff_tf_read) |
2507 | ap->ops->sff_tf_read(ap, &qc->tf); | |
127102ae | 2508 | #endif |
c6e6e666 JG |
2509 | |
2510 | /* fill these in, for the case where they are -not- overwritten */ | |
2511 | cmd->sense_buffer[0] = 0x70; | |
2512 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2513 | ||
2514 | ata_qc_reinit(qc); | |
2515 | ||
93f8fecb | 2516 | /* setup sg table and init transfer direction */ |
cadb7345 | 2517 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2518 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2519 | qc->dma_dir = DMA_FROM_DEVICE; |
2520 | ||
6e7846e9 | 2521 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2522 | qc->cdb[0] = REQUEST_SENSE; |
2523 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2524 | ||
2525 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2526 | qc->tf.command = ATA_CMD_PACKET; | |
2527 | ||
c6e6e666 | 2528 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2529 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2530 | qc->tf.feature |= ATAPI_PKT_DMA; |
2531 | } else { | |
0dc36888 | 2532 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2533 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2534 | qc->tf.lbah = 0; | |
c6e6e666 | 2535 | } |
a939c963 JG |
2536 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2537 | ||
c6e6e666 | 2538 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2539 | |
8e0e694a | 2540 | ata_qc_issue(qc); |
a939c963 JG |
2541 | |
2542 | DPRINTK("EXIT\n"); | |
2543 | } | |
2544 | ||
77853bf2 | 2545 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2546 | { |
2547 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2548 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2549 | |
a7dac447 | 2550 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2551 | |
246619da TH |
2552 | /* handle completion from new EH */ |
2553 | if (unlikely(qc->ap->ops->error_handler && | |
2554 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2555 | ||
2556 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2557 | /* FIXME: not quite right; we don't want the | |
2558 | * translation of taskfile registers into a | |
2559 | * sense descriptors, since that's only | |
2560 | * correct for ATA, not ATAPI | |
2561 | */ | |
750426aa | 2562 | ata_gen_passthru_sense(qc); |
246619da TH |
2563 | } |
2564 | ||
22aac089 TH |
2565 | /* SCSI EH automatically locks door if sdev->locked is |
2566 | * set. Sometimes door lock request continues to | |
2567 | * fail, for example, when no media is present. This | |
2568 | * creates a loop - SCSI EH issues door lock which | |
2569 | * fails and gets invoked again to acquire sense data | |
2570 | * for the failed command. | |
2571 | * | |
2572 | * If door lock fails, always clear sdev->locked to | |
2573 | * avoid this infinite loop. | |
2a5f07b5 TH |
2574 | * |
2575 | * This may happen before SCSI scan is complete. Make | |
2576 | * sure qc->dev->sdev isn't NULL before dereferencing. | |
22aac089 | 2577 | */ |
2a5f07b5 | 2578 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) |
22aac089 TH |
2579 | qc->dev->sdev->locked = 0; |
2580 | ||
246619da TH |
2581 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2582 | qc->scsidone(cmd); | |
2583 | ata_qc_free(qc); | |
2584 | return; | |
2585 | } | |
2586 | ||
2587 | /* successful completion or old EH failure path */ | |
a7dac447 | 2588 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2589 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2590 | atapi_request_sense(qc); |
77853bf2 | 2591 | return; |
74e6c8c3 | 2592 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2593 | /* FIXME: not quite right; we don't want the |
2594 | * translation of taskfile registers into | |
2595 | * a sense descriptors, since that's only | |
2596 | * correct for ATA, not ATAPI | |
2597 | */ | |
750426aa | 2598 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2599 | } else { |
1da177e4 LT |
2600 | u8 *scsicmd = cmd->cmnd; |
2601 | ||
fd71da46 | 2602 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
b445c568 | 2603 | unsigned long flags; |
87340e98 | 2604 | u8 *buf; |
b445c568 | 2605 | |
87340e98 | 2606 | buf = ata_scsi_rbuf_get(cmd, true, &flags); |
a15dbeb4 JG |
2607 | |
2608 | /* ATAPI devices typically report zero for their SCSI version, | |
2609 | * and sometimes deviate from the spec WRT response data | |
2610 | * format. If SCSI version is reported as zero like normal, | |
2611 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2612 | * to indicate to the Linux scsi midlayer this is a modern | |
2613 | * device. 2) Ensure response data format / ATAPI information | |
2614 | * are always correct. | |
a15dbeb4 JG |
2615 | */ |
2616 | if (buf[2] == 0) { | |
2617 | buf[2] = 0x5; | |
2618 | buf[3] = 0x32; | |
2619 | } | |
2620 | ||
87340e98 | 2621 | ata_scsi_rbuf_put(cmd, true, &flags); |
1da177e4 | 2622 | } |
a15dbeb4 | 2623 | |
1da177e4 LT |
2624 | cmd->result = SAM_STAT_GOOD; |
2625 | } | |
2626 | ||
2627 | qc->scsidone(cmd); | |
77853bf2 | 2628 | ata_qc_free(qc); |
1da177e4 LT |
2629 | } |
2630 | /** | |
2631 | * atapi_xlat - Initialize PACKET taskfile | |
2632 | * @qc: command structure to be initialized | |
1da177e4 LT |
2633 | * |
2634 | * LOCKING: | |
cca3974e | 2635 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2636 | * |
2637 | * RETURNS: | |
2638 | * Zero on success, non-zero on failure. | |
2639 | */ | |
ad706991 | 2640 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2641 | { |
542b1444 | 2642 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 2643 | struct ata_device *dev = qc->dev; |
542b1444 | 2644 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
5895ef9a | 2645 | int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); |
2db78dd3 | 2646 | unsigned int nbytes; |
1da177e4 | 2647 | |
2e5704f6 TH |
2648 | memset(qc->cdb, 0, dev->cdb_len); |
2649 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2650 | |
2651 | qc->complete_fn = atapi_qc_complete; | |
2652 | ||
2653 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2654 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2655 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2656 | DPRINTK("direction: write\n"); | |
2657 | } | |
2658 | ||
2659 | qc->tf.command = ATA_CMD_PACKET; | |
aacda375 | 2660 | ata_qc_set_pc_nbytes(qc); |
e00f1ff3 TH |
2661 | |
2662 | /* check whether ATAPI DMA is safe */ | |
5895ef9a | 2663 | if (!nodata && !using_pio && atapi_check_dma(qc)) |
e00f1ff3 | 2664 | using_pio = 1; |
1da177e4 | 2665 | |
e190222d TH |
2666 | /* Some controller variants snoop this value for Packet |
2667 | * transfers to do state machine and FIFO management. Thus we | |
2668 | * want to set it properly, and for DMA where it is | |
2669 | * effectively meaningless. | |
2670 | */ | |
aacda375 | 2671 | nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); |
2db78dd3 | 2672 | |
e190222d TH |
2673 | /* Most ATAPI devices which honor transfer chunk size don't |
2674 | * behave according to the spec when odd chunk size which | |
2675 | * matches the transfer length is specified. If the number of | |
2676 | * bytes to transfer is 2n+1. According to the spec, what | |
2677 | * should happen is to indicate that 2n+1 is going to be | |
2678 | * transferred and transfer 2n+2 bytes where the last byte is | |
2679 | * padding. | |
2680 | * | |
2681 | * In practice, this doesn't happen. ATAPI devices first | |
2682 | * indicate and transfer 2n bytes and then indicate and | |
2683 | * transfer 2 bytes where the last byte is padding. | |
2684 | * | |
2685 | * This inconsistency confuses several controllers which | |
2686 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2687 | * These controllers use actual number of transferred bytes to | |
2688 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2689 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2690 | * FISes are aligned to 4 bytes. This causes data corruption | |
2691 | * and buffer overrun. | |
2692 | * | |
2693 | * Always setting nbytes to even number solves this problem | |
2694 | * because then ATAPI devices don't have to split data at 2n | |
2695 | * boundaries. | |
2696 | */ | |
2697 | if (nbytes & 0x1) | |
2698 | nbytes++; | |
2699 | ||
2db78dd3 AC |
2700 | qc->tf.lbam = (nbytes & 0xFF); |
2701 | qc->tf.lbah = (nbytes >> 8); | |
2702 | ||
5895ef9a TH |
2703 | if (nodata) |
2704 | qc->tf.protocol = ATAPI_PROT_NODATA; | |
2705 | else if (using_pio) | |
2706 | qc->tf.protocol = ATAPI_PROT_PIO; | |
2707 | else { | |
e00f1ff3 | 2708 | /* DMA data xfer */ |
0dc36888 | 2709 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2710 | qc->tf.feature |= ATAPI_PKT_DMA; |
2711 | ||
91163006 TH |
2712 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2713 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2714 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2715 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2716 | } |
2717 | ||
2db78dd3 AC |
2718 | |
2719 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2720 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2721 | return 0; |
2722 | } | |
2723 | ||
2dcb407e | 2724 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2725 | { |
071f44b1 | 2726 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2727 | if (likely(devno < ata_link_max_devices(&ap->link))) |
2728 | return &ap->link.device[devno]; | |
2729 | } else { | |
2730 | if (likely(devno < ap->nr_pmp_links)) | |
2731 | return &ap->pmp_link[devno].device[0]; | |
2732 | } | |
2733 | ||
ab5b3a5b TH |
2734 | return NULL; |
2735 | } | |
2736 | ||
2dcb407e JG |
2737 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2738 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2739 | { |
41bda9c9 TH |
2740 | int devno; |
2741 | ||
ab5b3a5b | 2742 | /* skip commands not addressed to targets we simulate */ |
071f44b1 | 2743 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2744 | if (unlikely(scsidev->channel || scsidev->lun)) |
2745 | return NULL; | |
2746 | devno = scsidev->id; | |
2747 | } else { | |
2748 | if (unlikely(scsidev->id || scsidev->lun)) | |
2749 | return NULL; | |
2750 | devno = scsidev->channel; | |
2751 | } | |
ab5b3a5b | 2752 | |
41bda9c9 | 2753 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2754 | } |
2755 | ||
1da177e4 LT |
2756 | /** |
2757 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2758 | * @ap: ATA port to which the device is attached | |
2759 | * @scsidev: SCSI device from which we derive the ATA device | |
2760 | * | |
2761 | * Given various information provided in struct scsi_cmnd, | |
2762 | * map that onto an ATA bus, and using that mapping | |
2763 | * determine which ata_device is associated with the | |
2764 | * SCSI command to be sent. | |
2765 | * | |
2766 | * LOCKING: | |
cca3974e | 2767 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2768 | * |
2769 | * RETURNS: | |
2770 | * Associated ATA device, or %NULL if not found. | |
2771 | */ | |
1da177e4 | 2772 | static struct ata_device * |
057ace5e | 2773 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2774 | { |
ab5b3a5b | 2775 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2776 | |
2486fa56 | 2777 | if (unlikely(!dev || !ata_dev_enabled(dev))) |
1da177e4 LT |
2778 | return NULL; |
2779 | ||
1da177e4 LT |
2780 | return dev; |
2781 | } | |
2782 | ||
b095518e JG |
2783 | /* |
2784 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2785 | * @byte1: Byte 1 from pass-thru CDB. | |
2786 | * | |
2787 | * RETURNS: | |
2788 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2789 | */ | |
2790 | static u8 | |
2791 | ata_scsi_map_proto(u8 byte1) | |
2792 | { | |
2793 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2794 | case 3: /* Non-data */ |
2795 | return ATA_PROT_NODATA; | |
2796 | ||
2797 | case 6: /* DMA */ | |
2798 | case 10: /* UDMA Data-in */ | |
2799 | case 11: /* UDMA Data-Out */ | |
2800 | return ATA_PROT_DMA; | |
2801 | ||
2802 | case 4: /* PIO Data-in */ | |
2803 | case 5: /* PIO Data-out */ | |
2804 | return ATA_PROT_PIO; | |
2805 | ||
2806 | case 0: /* Hard Reset */ | |
2807 | case 1: /* SRST */ | |
2808 | case 8: /* Device Diagnostic */ | |
2809 | case 9: /* Device Reset */ | |
2810 | case 7: /* DMA Queued */ | |
2811 | case 12: /* FPDMA */ | |
2812 | case 15: /* Return Response Info */ | |
2813 | default: /* Reserved */ | |
2814 | break; | |
b095518e JG |
2815 | } |
2816 | ||
2817 | return ATA_PROT_UNKNOWN; | |
2818 | } | |
2819 | ||
2820 | /** | |
2821 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2822 | * @qc: command structure to be initialized | |
b095518e JG |
2823 | * |
2824 | * Handles either 12 or 16-byte versions of the CDB. | |
2825 | * | |
2826 | * RETURNS: | |
2827 | * Zero on success, non-zero on failure. | |
2828 | */ | |
ad706991 | 2829 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2830 | { |
2831 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2832 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2833 | struct ata_device *dev = qc->dev; |
ad706991 | 2834 | const u8 *cdb = scmd->cmnd; |
b095518e | 2835 | |
542b1444 | 2836 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2837 | goto invalid_fld; |
8190bdb9 | 2838 | |
b095518e JG |
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 | |
bd30add8 | 2888 | switch (tf->command) { |
295124dc | 2889 | /* READ/WRITE LONG use a non-standard sect_size */ |
bd30add8 TH |
2890 | case ATA_CMD_READ_LONG: |
2891 | case ATA_CMD_READ_LONG_ONCE: | |
2892 | case ATA_CMD_WRITE_LONG: | |
2893 | case ATA_CMD_WRITE_LONG_ONCE: | |
2894 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2895 | goto invalid_fld; | |
2896 | qc->sect_size = scsi_bufflen(scmd); | |
295124dc GG |
2897 | break; |
2898 | ||
2899 | /* commands using reported Logical Block size (e.g. 512 or 4K) */ | |
2900 | case ATA_CMD_CFA_WRITE_NE: | |
2901 | case ATA_CMD_CFA_TRANS_SECT: | |
2902 | case ATA_CMD_CFA_WRITE_MULT_NE: | |
2903 | /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ | |
2904 | case ATA_CMD_READ: | |
2905 | case ATA_CMD_READ_EXT: | |
2906 | case ATA_CMD_READ_QUEUED: | |
2907 | /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ | |
2908 | case ATA_CMD_FPDMA_READ: | |
2909 | case ATA_CMD_READ_MULTI: | |
2910 | case ATA_CMD_READ_MULTI_EXT: | |
2911 | case ATA_CMD_PIO_READ: | |
2912 | case ATA_CMD_PIO_READ_EXT: | |
2913 | case ATA_CMD_READ_STREAM_DMA_EXT: | |
2914 | case ATA_CMD_READ_STREAM_EXT: | |
2915 | case ATA_CMD_VERIFY: | |
2916 | case ATA_CMD_VERIFY_EXT: | |
2917 | case ATA_CMD_WRITE: | |
2918 | case ATA_CMD_WRITE_EXT: | |
2919 | case ATA_CMD_WRITE_FUA_EXT: | |
2920 | case ATA_CMD_WRITE_QUEUED: | |
2921 | case ATA_CMD_WRITE_QUEUED_FUA_EXT: | |
2922 | case ATA_CMD_FPDMA_WRITE: | |
2923 | case ATA_CMD_WRITE_MULTI: | |
2924 | case ATA_CMD_WRITE_MULTI_EXT: | |
2925 | case ATA_CMD_WRITE_MULTI_FUA_EXT: | |
2926 | case ATA_CMD_PIO_WRITE: | |
2927 | case ATA_CMD_PIO_WRITE_EXT: | |
2928 | case ATA_CMD_WRITE_STREAM_DMA_EXT: | |
2929 | case ATA_CMD_WRITE_STREAM_EXT: | |
2930 | qc->sect_size = scmd->device->sector_size; | |
2931 | break; | |
2932 | ||
2933 | /* Everything else uses 512 byte "sectors" */ | |
2934 | default: | |
2935 | qc->sect_size = ATA_SECT_SIZE; | |
bd30add8 TH |
2936 | } |
2937 | ||
2938 | /* | |
2939 | * Set flags so that all registers will be written, pass on | |
2940 | * write indication (used for PIO/DMA setup), result TF is | |
2941 | * copied back and we don't whine too much about its failure. | |
2942 | */ | |
bc496ed0 | 2943 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
bd30add8 TH |
2944 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
2945 | tf->flags |= ATA_TFLAG_WRITE; | |
2946 | ||
2947 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
2948 | ||
2949 | /* | |
2950 | * Set transfer length. | |
2951 | * | |
2952 | * TODO: find out if we need to do more here to | |
2953 | * cover scatter/gather case. | |
2954 | */ | |
2955 | ata_qc_set_pc_nbytes(qc); | |
2956 | ||
2957 | /* We may not issue DMA commands if no DMA mode is set */ | |
2958 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2959 | goto invalid_fld; | |
2960 | ||
1dce589c AL |
2961 | /* sanity check for pio multi commands */ |
2962 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2963 | goto invalid_fld; | |
2964 | ||
2965 | if (is_multi_taskfile(tf)) { | |
2966 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2967 | ||
2968 | /* compare the passed through multi_count | |
2969 | * with the cached multi_count of libata | |
2970 | */ | |
2971 | if (multi_count != dev->multi_count) | |
2972 | ata_dev_printk(dev, KERN_WARNING, | |
2973 | "invalid multi_count %u ignored\n", | |
2974 | multi_count); | |
d26fc955 | 2975 | } |
1dce589c | 2976 | |
b095518e JG |
2977 | /* |
2978 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2979 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2980 | * by an update to hardware-specific registers for each | |
2981 | * controller (i.e. the reason for ->set_piomode(), | |
2982 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2983 | */ | |
bd30add8 TH |
2984 | if (tf->command == ATA_CMD_SET_FEATURES && |
2985 | tf->feature == SETFEATURES_XFER) | |
9a405257 | 2986 | goto invalid_fld; |
b095518e JG |
2987 | |
2988 | /* | |
bd30add8 TH |
2989 | * Filter TPM commands by default. These provide an |
2990 | * essentially uncontrolled encrypted "back door" between | |
2991 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2992 | * have a real reason for wanting to use them. This ensures | |
2993 | * that installed software cannot easily mess stuff up without | |
2994 | * user intent. DVR type users will probably ship with this enabled | |
2995 | * for movie content management. | |
b095518e | 2996 | * |
bd30add8 TH |
2997 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock |
2998 | * for this and should do in future but that it is not sufficient as | |
2999 | * DCS is an optional feature set. Thus we also do the software filter | |
3000 | * so that we comply with the TC consortium stated goal that the user | |
3001 | * can turn off TC features of their system. | |
b095518e | 3002 | */ |
bd30add8 TH |
3003 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) |
3004 | goto invalid_fld; | |
e61e0672 | 3005 | |
b095518e | 3006 | return 0; |
9a405257 TH |
3007 | |
3008 | invalid_fld: | |
542b1444 | 3009 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
3010 | /* "Invalid field in cdb" */ |
3011 | return 1; | |
b095518e JG |
3012 | } |
3013 | ||
18f0f978 CH |
3014 | static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) |
3015 | { | |
3016 | struct ata_taskfile *tf = &qc->tf; | |
3017 | struct scsi_cmnd *scmd = qc->scsicmd; | |
3018 | struct ata_device *dev = qc->dev; | |
3019 | const u8 *cdb = scmd->cmnd; | |
3020 | u64 block; | |
3021 | u32 n_block; | |
3022 | u32 size; | |
3023 | void *buf; | |
3024 | ||
3025 | /* we may not issue DMA commands if no DMA mode is set */ | |
3026 | if (unlikely(!dev->dma_mode)) | |
3027 | goto invalid_fld; | |
3028 | ||
3029 | if (unlikely(scmd->cmd_len < 16)) | |
3030 | goto invalid_fld; | |
3031 | scsi_16_lba_len(cdb, &block, &n_block); | |
3032 | ||
3033 | /* for now we only support WRITE SAME with the unmap bit set */ | |
3034 | if (unlikely(!(cdb[1] & 0x8))) | |
3035 | goto invalid_fld; | |
3036 | ||
3037 | /* | |
3038 | * WRITE SAME always has a sector sized buffer as payload, this | |
3039 | * should never be a multiple entry S/G list. | |
3040 | */ | |
3041 | if (!scsi_sg_count(scmd)) | |
3042 | goto invalid_fld; | |
3043 | ||
3044 | buf = page_address(sg_page(scsi_sglist(scmd))); | |
d0634c4a | 3045 | size = ata_set_lba_range_entries(buf, 512, block, n_block); |
18f0f978 CH |
3046 | |
3047 | tf->protocol = ATA_PROT_DMA; | |
3048 | tf->hob_feature = 0; | |
3049 | tf->feature = ATA_DSM_TRIM; | |
3050 | tf->hob_nsect = (size / 512) >> 8; | |
3051 | tf->nsect = size / 512; | |
3052 | tf->command = ATA_CMD_DSM; | |
3053 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | | |
3054 | ATA_TFLAG_WRITE; | |
3055 | ||
3056 | ata_qc_set_pc_nbytes(qc); | |
3057 | ||
3058 | return 0; | |
3059 | ||
3060 | invalid_fld: | |
3061 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); | |
3062 | /* "Invalid field in cdb" */ | |
3063 | return 1; | |
3064 | } | |
3065 | ||
1da177e4 LT |
3066 | /** |
3067 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
3068 | * @dev: ATA device | |
3069 | * @cmd: SCSI command opcode to consider | |
3070 | * | |
3071 | * Look up the SCSI command given, and determine whether the | |
3072 | * SCSI command is to be translated or simulated. | |
3073 | * | |
3074 | * RETURNS: | |
3075 | * Pointer to translation function if possible, %NULL if not. | |
3076 | */ | |
3077 | ||
3078 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
3079 | { | |
3080 | switch (cmd) { | |
3081 | case READ_6: | |
3082 | case READ_10: | |
3083 | case READ_16: | |
3084 | ||
3085 | case WRITE_6: | |
3086 | case WRITE_10: | |
3087 | case WRITE_16: | |
3088 | return ata_scsi_rw_xlat; | |
3089 | ||
0cdd6eb7 | 3090 | case WRITE_SAME_16: |
18f0f978 CH |
3091 | return ata_scsi_write_same_xlat; |
3092 | ||
1da177e4 LT |
3093 | case SYNCHRONIZE_CACHE: |
3094 | if (ata_try_flush_cache(dev)) | |
3095 | return ata_scsi_flush_xlat; | |
3096 | break; | |
3097 | ||
3098 | case VERIFY: | |
3099 | case VERIFY_16: | |
3100 | return ata_scsi_verify_xlat; | |
b095518e JG |
3101 | |
3102 | case ATA_12: | |
3103 | case ATA_16: | |
3104 | return ata_scsi_pass_thru; | |
da61396d | 3105 | |
972dcafb DG |
3106 | case START_STOP: |
3107 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
3108 | } |
3109 | ||
3110 | return NULL; | |
3111 | } | |
3112 | ||
3113 | /** | |
3114 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
3115 | * @ap: ATA port to which the command was being sent | |
3116 | * @cmd: SCSI command to dump | |
3117 | * | |
3118 | * Prints the contents of a SCSI command via printk(). | |
3119 | */ | |
3120 | ||
3121 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
3122 | struct scsi_cmnd *cmd) | |
3123 | { | |
3124 | #ifdef ATA_DEBUG | |
3125 | struct scsi_device *scsidev = cmd->device; | |
3126 | u8 *scsicmd = cmd->cmnd; | |
3127 | ||
3128 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 3129 | ap->print_id, |
1da177e4 LT |
3130 | scsidev->channel, scsidev->id, scsidev->lun, |
3131 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
3132 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
3133 | scsicmd[8]); | |
3134 | #endif | |
3135 | } | |
3136 | ||
542b1444 | 3137 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 | 3138 | struct ata_device *dev) |
eb3f0f9c | 3139 | { |
baf4fdfa ML |
3140 | u8 scsi_op = scmd->cmnd[0]; |
3141 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
3142 | int rc = 0; |
3143 | ||
eb3f0f9c | 3144 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
3145 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
3146 | goto bad_cdb_len; | |
eb3f0f9c | 3147 | |
baf4fdfa ML |
3148 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
3149 | } else { | |
3150 | if (unlikely(!scmd->cmd_len)) | |
3151 | goto bad_cdb_len; | |
3152 | ||
3153 | xlat_func = NULL; | |
3154 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
3155 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
3156 | int len = COMMAND_SIZE(scsi_op); |
3157 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
3158 | goto bad_cdb_len; |
3159 | ||
3160 | xlat_func = atapi_xlat; | |
3161 | } else { | |
3162 | /* ATA_16 passthru, treat as an ATA command */ | |
3163 | if (unlikely(scmd->cmd_len > 16)) | |
3164 | goto bad_cdb_len; | |
3165 | ||
3166 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
3167 | } | |
3168 | } | |
3169 | ||
3170 | if (xlat_func) | |
b27dcfb0 | 3171 | rc = ata_scsi_translate(dev, scmd, xlat_func); |
baf4fdfa | 3172 | else |
b27dcfb0 | 3173 | ata_scsi_simulate(dev, scmd); |
2115ea94 TH |
3174 | |
3175 | return rc; | |
baf4fdfa ML |
3176 | |
3177 | bad_cdb_len: | |
3178 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
3179 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
3180 | scmd->result = DID_ERROR << 16; | |
b27dcfb0 | 3181 | scmd->scsi_done(scmd); |
baf4fdfa | 3182 | return 0; |
eb3f0f9c BK |
3183 | } |
3184 | ||
1da177e4 LT |
3185 | /** |
3186 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
23e701e6 | 3187 | * @shost: SCSI host of command to be sent |
1da177e4 | 3188 | * @cmd: SCSI command to be sent |
1da177e4 LT |
3189 | * |
3190 | * In some cases, this function translates SCSI commands into | |
3191 | * ATA taskfiles, and queues the taskfiles to be sent to | |
3192 | * hardware. In other cases, this function simulates a | |
3193 | * SCSI device by evaluating and responding to certain | |
3194 | * SCSI commands. This creates the overall effect of | |
3195 | * ATA and ATAPI devices appearing as SCSI devices. | |
3196 | * | |
3197 | * LOCKING: | |
23e701e6 | 3198 | * ATA host lock |
1da177e4 LT |
3199 | * |
3200 | * RETURNS: | |
2115ea94 TH |
3201 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3202 | * 0 otherwise. | |
1da177e4 | 3203 | */ |
23e701e6 | 3204 | int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) |
1da177e4 LT |
3205 | { |
3206 | struct ata_port *ap; | |
3207 | struct ata_device *dev; | |
3208 | struct scsi_device *scsidev = cmd->device; | |
2115ea94 | 3209 | int rc = 0; |
23e701e6 | 3210 | unsigned long irq_flags; |
1da177e4 | 3211 | |
35bb94b1 | 3212 | ap = ata_shost_to_port(shost); |
005a5a06 | 3213 | |
23e701e6 | 3214 | spin_lock_irqsave(ap->lock, irq_flags); |
1da177e4 LT |
3215 | |
3216 | ata_scsi_dump_cdb(ap, cmd); | |
3217 | ||
3218 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 3219 | if (likely(dev)) |
b27dcfb0 | 3220 | rc = __ata_scsi_queuecmd(cmd, dev); |
eb3f0f9c | 3221 | else { |
1da177e4 | 3222 | cmd->result = (DID_BAD_TARGET << 16); |
23e701e6 | 3223 | cmd->scsi_done(cmd); |
1da177e4 LT |
3224 | } |
3225 | ||
23e701e6 JG |
3226 | spin_unlock_irqrestore(ap->lock, irq_flags); |
3227 | ||
2115ea94 | 3228 | return rc; |
1da177e4 LT |
3229 | } |
3230 | ||
3231 | /** | |
3232 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 3233 | * @dev: the target device |
1da177e4 | 3234 | * @cmd: SCSI command being sent to device. |
1da177e4 LT |
3235 | * |
3236 | * Interprets and directly executes a select list of SCSI commands | |
3237 | * that can be handled internally. | |
3238 | * | |
3239 | * LOCKING: | |
cca3974e | 3240 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3241 | */ |
3242 | ||
b27dcfb0 | 3243 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) |
1da177e4 LT |
3244 | { |
3245 | struct ata_scsi_args args; | |
057ace5e | 3246 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 3247 | u8 tmp8; |
1da177e4 | 3248 | |
9a3dccc4 TH |
3249 | args.dev = dev; |
3250 | args.id = dev->id; | |
1da177e4 | 3251 | args.cmd = cmd; |
b27dcfb0 | 3252 | args.done = cmd->scsi_done; |
1da177e4 LT |
3253 | |
3254 | switch(scsicmd[0]) { | |
2dcb407e JG |
3255 | /* TODO: worth improving? */ |
3256 | case FORMAT_UNIT: | |
b27dcfb0 | 3257 | ata_scsi_invalid_field(cmd); |
2dcb407e JG |
3258 | break; |
3259 | ||
3260 | case INQUIRY: | |
3261 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
b27dcfb0 | 3262 | ata_scsi_invalid_field(cmd); |
2dcb407e JG |
3263 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3264 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3265 | else switch (scsicmd[2]) { | |
3266 | case 0x00: | |
3267 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3268 | break; |
2dcb407e JG |
3269 | case 0x80: |
3270 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3271 | break; |
2dcb407e JG |
3272 | case 0x83: |
3273 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3274 | break; |
2dcb407e JG |
3275 | case 0x89: |
3276 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3277 | break; | |
18f0f978 CH |
3278 | case 0xb0: |
3279 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); | |
3280 | break; | |
1e9dbc92 MW |
3281 | case 0xb1: |
3282 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); | |
3283 | break; | |
02e0a604 MP |
3284 | case 0xb2: |
3285 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); | |
3286 | break; | |
2dcb407e | 3287 | default: |
b27dcfb0 | 3288 | ata_scsi_invalid_field(cmd); |
1da177e4 | 3289 | break; |
2dcb407e JG |
3290 | } |
3291 | break; | |
3292 | ||
3293 | case MODE_SENSE: | |
3294 | case MODE_SENSE_10: | |
3295 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3296 | break; | |
3297 | ||
3298 | case MODE_SELECT: /* unconditionally return */ | |
3299 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
b27dcfb0 | 3300 | ata_scsi_invalid_field(cmd); |
2dcb407e | 3301 | break; |
1da177e4 | 3302 | |
2dcb407e JG |
3303 | case READ_CAPACITY: |
3304 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3305 | break; | |
3306 | ||
3307 | case SERVICE_ACTION_IN: | |
3308 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3309 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e | 3310 | else |
b27dcfb0 | 3311 | ata_scsi_invalid_field(cmd); |
2dcb407e | 3312 | break; |
1da177e4 | 3313 | |
2dcb407e JG |
3314 | case REPORT_LUNS: |
3315 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3316 | break; | |
1da177e4 | 3317 | |
2dcb407e JG |
3318 | case REQUEST_SENSE: |
3319 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3320 | cmd->result = (DRIVER_SENSE << 24); | |
b27dcfb0 | 3321 | cmd->scsi_done(cmd); |
2dcb407e | 3322 | break; |
1da177e4 | 3323 | |
2dcb407e JG |
3324 | /* if we reach this, then writeback caching is disabled, |
3325 | * turning this into a no-op. | |
3326 | */ | |
3327 | case SYNCHRONIZE_CACHE: | |
3328 | /* fall through */ | |
3329 | ||
3330 | /* no-op's, complete with success */ | |
3331 | case REZERO_UNIT: | |
3332 | case SEEK_6: | |
3333 | case SEEK_10: | |
3334 | case TEST_UNIT_READY: | |
3335 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3336 | break; | |
45394145 | 3337 | |
2dcb407e JG |
3338 | case SEND_DIAGNOSTIC: |
3339 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3340 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3341 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e | 3342 | else |
b27dcfb0 | 3343 | ata_scsi_invalid_field(cmd); |
2dcb407e | 3344 | break; |
1da177e4 | 3345 | |
2dcb407e JG |
3346 | /* all other commands */ |
3347 | default: | |
3348 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3349 | /* "Invalid command operation code" */ | |
b27dcfb0 | 3350 | cmd->scsi_done(cmd); |
2dcb407e | 3351 | break; |
1da177e4 LT |
3352 | } |
3353 | } | |
3354 | ||
f3187195 TH |
3355 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3356 | { | |
3357 | int i, rc; | |
3358 | ||
3359 | for (i = 0; i < host->n_ports; i++) { | |
3360 | struct ata_port *ap = host->ports[i]; | |
3361 | struct Scsi_Host *shost; | |
3362 | ||
3363 | rc = -ENOMEM; | |
3364 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3365 | if (!shost) | |
3366 | goto err_alloc; | |
3367 | ||
3368 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3369 | ap->scsi_host = shost; | |
3370 | ||
d9027470 | 3371 | shost->transportt = ata_scsi_transport_template; |
f3187195 TH |
3372 | shost->unique_id = ap->print_id; |
3373 | shost->max_id = 16; | |
3374 | shost->max_lun = 1; | |
3375 | shost->max_channel = 1; | |
3376 | shost->max_cmd_len = 16; | |
3377 | ||
31cc23b3 TH |
3378 | /* Schedule policy is determined by ->qc_defer() |
3379 | * callback and it needs to see every deferred qc. | |
3380 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3381 | * automatically deferring requests. | |
3382 | */ | |
3383 | shost->max_host_blocked = 1; | |
3384 | ||
f3187195 TH |
3385 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3386 | if (rc) | |
3387 | goto err_add; | |
3388 | } | |
3389 | ||
3390 | return 0; | |
3391 | ||
3392 | err_add: | |
3393 | scsi_host_put(host->ports[i]->scsi_host); | |
3394 | err_alloc: | |
3395 | while (--i >= 0) { | |
3396 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3397 | ||
3398 | scsi_remove_host(shost); | |
3399 | scsi_host_put(shost); | |
3400 | } | |
3401 | return rc; | |
3402 | } | |
3403 | ||
1ae46317 | 3404 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3405 | { |
1ae46317 TH |
3406 | int tries = 5; |
3407 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3408 | struct ata_link *link; |
1ae46317 | 3409 | struct ata_device *dev; |
644dd0cc | 3410 | |
1ae46317 | 3411 | repeat: |
1eca4365 TH |
3412 | ata_for_each_link(link, ap, EDGE) { |
3413 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 TH |
3414 | struct scsi_device *sdev; |
3415 | int channel = 0, id = 0; | |
3edebac4 | 3416 | |
1eca4365 | 3417 | if (dev->sdev) |
41bda9c9 | 3418 | continue; |
3f19ee8c | 3419 | |
41bda9c9 TH |
3420 | if (ata_is_host_link(link)) |
3421 | id = dev->devno; | |
3422 | else | |
3423 | channel = link->pmp; | |
3424 | ||
3425 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3426 | NULL); | |
3427 | if (!IS_ERR(sdev)) { | |
3428 | dev->sdev = sdev; | |
3429 | scsi_device_put(sdev); | |
295124dc GG |
3430 | } else { |
3431 | dev->sdev = NULL; | |
41bda9c9 | 3432 | } |
3edebac4 | 3433 | } |
3f19ee8c | 3434 | } |
1ae46317 TH |
3435 | |
3436 | /* If we scanned while EH was in progress or allocation | |
3437 | * failure occurred, scan would have failed silently. Check | |
3438 | * whether all devices are attached. | |
3439 | */ | |
1eca4365 TH |
3440 | ata_for_each_link(link, ap, EDGE) { |
3441 | ata_for_each_dev(dev, link, ENABLED) { | |
3442 | if (!dev->sdev) | |
41bda9c9 TH |
3443 | goto exit_loop; |
3444 | } | |
1ae46317 | 3445 | } |
41bda9c9 TH |
3446 | exit_loop: |
3447 | if (!link) | |
1ae46317 TH |
3448 | return; |
3449 | ||
3450 | /* we're missing some SCSI devices */ | |
3451 | if (sync) { | |
3452 | /* If caller requested synchrnous scan && we've made | |
3453 | * any progress, sleep briefly and repeat. | |
3454 | */ | |
3455 | if (dev != last_failed_dev) { | |
3456 | msleep(100); | |
3457 | last_failed_dev = dev; | |
3458 | goto repeat; | |
3459 | } | |
3460 | ||
3461 | /* We might be failing to detect boot device, give it | |
3462 | * a few more chances. | |
3463 | */ | |
3464 | if (--tries) { | |
3465 | msleep(100); | |
3466 | goto repeat; | |
3467 | } | |
3468 | ||
3469 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3470 | "failed without making any progress,\n" | |
3471 | " switching to async\n"); | |
3472 | } | |
3473 | ||
ad72cf98 | 3474 | queue_delayed_work(system_long_wq, &ap->hotplug_task, |
1ae46317 | 3475 | round_jiffies_relative(HZ)); |
644dd0cc | 3476 | } |
0ea035a3 TH |
3477 | |
3478 | /** | |
3479 | * ata_scsi_offline_dev - offline attached SCSI device | |
3480 | * @dev: ATA device to offline attached SCSI device for | |
3481 | * | |
3482 | * This function is called from ata_eh_hotplug() and responsible | |
3483 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3484 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3485 | * against clearing. |
3486 | * | |
3487 | * LOCKING: | |
cca3974e | 3488 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3489 | * |
3490 | * RETURNS: | |
3491 | * 1 if attached SCSI device exists, 0 otherwise. | |
3492 | */ | |
3493 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3494 | { | |
3495 | if (dev->sdev) { | |
3496 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3497 | return 1; | |
3498 | } | |
3499 | return 0; | |
3500 | } | |
580b2102 TH |
3501 | |
3502 | /** | |
3503 | * ata_scsi_remove_dev - remove attached SCSI device | |
3504 | * @dev: ATA device to remove attached SCSI device for | |
3505 | * | |
3506 | * This function is called from ata_eh_scsi_hotplug() and | |
3507 | * responsible for removing the SCSI device attached to @dev. | |
3508 | * | |
3509 | * LOCKING: | |
3510 | * Kernel thread context (may sleep). | |
3511 | */ | |
3512 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3513 | { | |
9af5c9c9 | 3514 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3515 | struct scsi_device *sdev; |
3516 | unsigned long flags; | |
3517 | ||
3518 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3519 | * state doesn't change underneath us and thus | |
3520 | * scsi_device_get() always succeeds. The mutex locking can | |
3521 | * be removed if there is __scsi_device_get() interface which | |
3522 | * increments reference counts regardless of device state. | |
3523 | */ | |
cca3974e | 3524 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3525 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3526 | |
cca3974e | 3527 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3528 | sdev = dev->sdev; |
3529 | dev->sdev = NULL; | |
3530 | ||
3531 | if (sdev) { | |
3532 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3533 | * away underneath us after the host lock and |
580b2102 TH |
3534 | * scan_mutex are released. Hold onto it. |
3535 | */ | |
3536 | if (scsi_device_get(sdev) == 0) { | |
3537 | /* The following ensures the attached sdev is | |
3538 | * offline on return from ata_scsi_offline_dev() | |
3539 | * regardless it wins or loses the race | |
3540 | * against this function. | |
3541 | */ | |
3542 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3543 | } else { | |
3544 | WARN_ON(1); | |
3545 | sdev = NULL; | |
3546 | } | |
3547 | } | |
3548 | ||
ba6a1308 | 3549 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3550 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3551 | |
3552 | if (sdev) { | |
3553 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
b9d5fc41 | 3554 | dev_name(&sdev->sdev_gendev)); |
580b2102 TH |
3555 | |
3556 | scsi_remove_device(sdev); | |
3557 | scsi_device_put(sdev); | |
3558 | } | |
3559 | } | |
3560 | ||
41bda9c9 TH |
3561 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3562 | { | |
3563 | struct ata_port *ap = link->ap; | |
3564 | struct ata_device *dev; | |
3565 | ||
1eca4365 | 3566 | ata_for_each_dev(dev, link, ALL) { |
41bda9c9 TH |
3567 | unsigned long flags; |
3568 | ||
3569 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3570 | continue; | |
3571 | ||
3572 | spin_lock_irqsave(ap->lock, flags); | |
3573 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3574 | spin_unlock_irqrestore(ap->lock, flags); | |
3575 | ||
3576 | ata_scsi_remove_dev(dev); | |
3577 | } | |
3578 | } | |
3579 | ||
2f294968 KCA |
3580 | /** |
3581 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3582 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3583 | * |
3584 | * Tell the block layer to send a media change notification | |
3585 | * event. | |
3586 | * | |
3587 | * LOCKING: | |
854c73a2 | 3588 | * spin_lock_irqsave(host lock) |
2f294968 | 3589 | */ |
854c73a2 | 3590 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3591 | { |
854c73a2 | 3592 | if (dev->sdev) |
f26792d5 JG |
3593 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3594 | GFP_ATOMIC); | |
2f294968 | 3595 | } |
2f294968 | 3596 | |
580b2102 TH |
3597 | /** |
3598 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3599 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3600 | * |
3601 | * Perform SCSI part of hotplug. It's executed from a separate | |
3602 | * workqueue after EH completes. This is necessary because SCSI | |
3603 | * hot plugging requires working EH and hot unplugging is | |
3604 | * synchronized with hot plugging with a mutex. | |
3605 | * | |
3606 | * LOCKING: | |
3607 | * Kernel thread context (may sleep). | |
3608 | */ | |
65f27f38 | 3609 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3610 | { |
65f27f38 DH |
3611 | struct ata_port *ap = |
3612 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3613 | int i; |
580b2102 | 3614 | |
b51e9e5d | 3615 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3616 | DPRINTK("ENTER/EXIT - unloading\n"); |
3617 | return; | |
3618 | } | |
3619 | ||
3620 | DPRINTK("ENTER\n"); | |
ad72cf98 | 3621 | mutex_lock(&ap->scsi_scan_mutex); |
580b2102 | 3622 | |
41bda9c9 TH |
3623 | /* Unplug detached devices. We cannot use link iterator here |
3624 | * because PMP links have to be scanned even if PMP is | |
3625 | * currently not attached. Iterate manually. | |
3626 | */ | |
3627 | ata_scsi_handle_link_detach(&ap->link); | |
3628 | if (ap->pmp_link) | |
3629 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3630 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3631 | |
3632 | /* scan for new ones */ | |
1ae46317 | 3633 | ata_scsi_scan_host(ap, 0); |
580b2102 | 3634 | |
ad72cf98 | 3635 | mutex_unlock(&ap->scsi_scan_mutex); |
580b2102 TH |
3636 | DPRINTK("EXIT\n"); |
3637 | } | |
83c47bcb TH |
3638 | |
3639 | /** | |
3640 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3641 | * @shost: SCSI host to scan | |
3642 | * @channel: Channel to scan | |
3643 | * @id: ID to scan | |
3644 | * @lun: LUN to scan | |
3645 | * | |
3646 | * This function is called when user explicitly requests bus | |
3647 | * scan. Set probe pending flag and invoke EH. | |
3648 | * | |
3649 | * LOCKING: | |
3650 | * SCSI layer (we don't care) | |
3651 | * | |
3652 | * RETURNS: | |
3653 | * Zero. | |
3654 | */ | |
d9027470 GG |
3655 | int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
3656 | unsigned int id, unsigned int lun) | |
83c47bcb TH |
3657 | { |
3658 | struct ata_port *ap = ata_shost_to_port(shost); | |
3659 | unsigned long flags; | |
41bda9c9 | 3660 | int devno, rc = 0; |
83c47bcb TH |
3661 | |
3662 | if (!ap->ops->error_handler) | |
3663 | return -EOPNOTSUPP; | |
3664 | ||
41bda9c9 | 3665 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3666 | return -EINVAL; |
3667 | ||
071f44b1 | 3668 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
3669 | if (channel != SCAN_WILD_CARD && channel) |
3670 | return -EINVAL; | |
3671 | devno = id; | |
3672 | } else { | |
3673 | if (id != SCAN_WILD_CARD && id) | |
3674 | return -EINVAL; | |
3675 | devno = channel; | |
3676 | } | |
3677 | ||
ba6a1308 | 3678 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3679 | |
41bda9c9 TH |
3680 | if (devno == SCAN_WILD_CARD) { |
3681 | struct ata_link *link; | |
3682 | ||
1eca4365 | 3683 | ata_for_each_link(link, ap, EDGE) { |
41bda9c9 | 3684 | struct ata_eh_info *ehi = &link->eh_info; |
b558eddd | 3685 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 3686 | ehi->action |= ATA_EH_RESET; |
41bda9c9 | 3687 | } |
83c47bcb | 3688 | } else { |
41bda9c9 | 3689 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3690 | |
3691 | if (dev) { | |
41bda9c9 | 3692 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 | 3693 | ehi->probe_mask |= 1 << dev->devno; |
cf480626 | 3694 | ehi->action |= ATA_EH_RESET; |
83c47bcb TH |
3695 | } else |
3696 | rc = -EINVAL; | |
3697 | } | |
3698 | ||
309afcb5 | 3699 | if (rc == 0) { |
83c47bcb | 3700 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3701 | spin_unlock_irqrestore(ap->lock, flags); |
3702 | ata_port_wait_eh(ap); | |
3703 | } else | |
3704 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3705 | |
3706 | return rc; | |
3707 | } | |
3057ac3c | 3708 | |
3709 | /** | |
d0171269 | 3710 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3711 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3712 | * |
d0171269 | 3713 | * After ATA pass thru (SAT) commands are executed successfully, |
ad72cf98 | 3714 | * libata need to propagate the changes to SCSI layer. |
3057ac3c | 3715 | * |
d0171269 TH |
3716 | * LOCKING: |
3717 | * Kernel thread context (may sleep). | |
3057ac3c | 3718 | */ |
65f27f38 | 3719 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3720 | { |
65f27f38 DH |
3721 | struct ata_port *ap = |
3722 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3723 | struct ata_link *link; |
f58229f8 | 3724 | struct ata_device *dev; |
f84e7e41 | 3725 | unsigned long flags; |
3057ac3c | 3726 | |
ad72cf98 | 3727 | mutex_lock(&ap->scsi_scan_mutex); |
f84e7e41 TH |
3728 | spin_lock_irqsave(ap->lock, flags); |
3729 | ||
1eca4365 TH |
3730 | ata_for_each_link(link, ap, EDGE) { |
3731 | ata_for_each_dev(dev, link, ENABLED) { | |
41bda9c9 | 3732 | struct scsi_device *sdev = dev->sdev; |
3057ac3c | 3733 | |
1eca4365 | 3734 | if (!sdev) |
41bda9c9 TH |
3735 | continue; |
3736 | if (scsi_device_get(sdev)) | |
3737 | continue; | |
f84e7e41 | 3738 | |
41bda9c9 TH |
3739 | spin_unlock_irqrestore(ap->lock, flags); |
3740 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3741 | scsi_device_put(sdev); | |
3742 | spin_lock_irqsave(ap->lock, flags); | |
3743 | } | |
3057ac3c | 3744 | } |
f84e7e41 TH |
3745 | |
3746 | spin_unlock_irqrestore(ap->lock, flags); | |
ad72cf98 | 3747 | mutex_unlock(&ap->scsi_scan_mutex); |
3057ac3c | 3748 | } |
80289167 BK |
3749 | |
3750 | /** | |
3751 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3752 | * @host: ATA host container for all SAS ports |
80289167 | 3753 | * @port_info: Information from low-level host driver |
cca3974e | 3754 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3755 | * |
3756 | * LOCKING: | |
3757 | * PCI/etc. bus probe sem. | |
3758 | * | |
3759 | * RETURNS: | |
3760 | * ata_port pointer on success / NULL on failure. | |
3761 | */ | |
3762 | ||
cca3974e | 3763 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3764 | struct ata_port_info *port_info, |
cca3974e | 3765 | struct Scsi_Host *shost) |
80289167 | 3766 | { |
f3187195 | 3767 | struct ata_port *ap; |
80289167 | 3768 | |
f3187195 | 3769 | ap = ata_port_alloc(host); |
80289167 BK |
3770 | if (!ap) |
3771 | return NULL; | |
3772 | ||
f3187195 | 3773 | ap->port_no = 0; |
a29b5dad | 3774 | ap->lock = &host->lock; |
f3187195 TH |
3775 | ap->pio_mask = port_info->pio_mask; |
3776 | ap->mwdma_mask = port_info->mwdma_mask; | |
3777 | ap->udma_mask = port_info->udma_mask; | |
3778 | ap->flags |= port_info->flags; | |
3779 | ap->ops = port_info->port_ops; | |
3780 | ap->cbl = ATA_CBL_SATA; | |
3781 | ||
80289167 BK |
3782 | return ap; |
3783 | } | |
3784 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3785 | ||
3786 | /** | |
3787 | * ata_sas_port_start - Set port up for dma. | |
3788 | * @ap: Port to initialize | |
3789 | * | |
3790 | * Called just after data structures for each port are | |
dde20207 | 3791 | * initialized. |
80289167 BK |
3792 | * |
3793 | * May be used as the port_start() entry in ata_port_operations. | |
3794 | * | |
3795 | * LOCKING: | |
3796 | * Inherited from caller. | |
3797 | */ | |
3798 | int ata_sas_port_start(struct ata_port *ap) | |
3799 | { | |
dde20207 | 3800 | return 0; |
80289167 BK |
3801 | } |
3802 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3803 | ||
3804 | /** | |
3805 | * ata_port_stop - Undo ata_sas_port_start() | |
3806 | * @ap: Port to shut down | |
3807 | * | |
80289167 BK |
3808 | * May be used as the port_stop() entry in ata_port_operations. |
3809 | * | |
3810 | * LOCKING: | |
3811 | * Inherited from caller. | |
3812 | */ | |
3813 | ||
3814 | void ata_sas_port_stop(struct ata_port *ap) | |
3815 | { | |
80289167 BK |
3816 | } |
3817 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3818 | ||
3819 | /** | |
3820 | * ata_sas_port_init - Initialize a SATA device | |
3821 | * @ap: SATA port to initialize | |
3822 | * | |
3823 | * LOCKING: | |
3824 | * PCI/etc. bus probe sem. | |
3825 | * | |
3826 | * RETURNS: | |
3827 | * Zero on success, non-zero on error. | |
3828 | */ | |
3829 | ||
3830 | int ata_sas_port_init(struct ata_port *ap) | |
3831 | { | |
3832 | int rc = ap->ops->port_start(ap); | |
3833 | ||
f3187195 TH |
3834 | if (!rc) { |
3835 | ap->print_id = ata_print_id++; | |
238c9cf9 | 3836 | rc = ata_port_probe(ap); |
f3187195 | 3837 | } |
80289167 BK |
3838 | |
3839 | return rc; | |
3840 | } | |
3841 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3842 | ||
3843 | /** | |
3844 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3845 | * @ap: SATA port to destroy | |
3846 | * | |
3847 | */ | |
3848 | ||
3849 | void ata_sas_port_destroy(struct ata_port *ap) | |
3850 | { | |
f0d36efd TH |
3851 | if (ap->ops->port_stop) |
3852 | ap->ops->port_stop(ap); | |
80289167 BK |
3853 | kfree(ap); |
3854 | } | |
3855 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3856 | ||
3857 | /** | |
3858 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3859 | * @sdev: SCSI device to configure | |
3860 | * @ap: ATA port to which SCSI device is attached | |
3861 | * | |
3862 | * RETURNS: | |
3863 | * Zero. | |
3864 | */ | |
3865 | ||
3866 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3867 | { | |
3868 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3869 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3870 | return 0; |
3871 | } | |
3872 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3873 | ||
3874 | /** | |
3875 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3876 | * @cmd: SCSI command to be sent | |
80289167 BK |
3877 | * @ap: ATA port to which the command is being sent |
3878 | * | |
3879 | * RETURNS: | |
08475a19 BK |
3880 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3881 | * 0 otherwise. | |
80289167 BK |
3882 | */ |
3883 | ||
b27dcfb0 | 3884 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) |
80289167 | 3885 | { |
08475a19 BK |
3886 | int rc = 0; |
3887 | ||
80289167 BK |
3888 | ata_scsi_dump_cdb(ap, cmd); |
3889 | ||
2486fa56 | 3890 | if (likely(ata_dev_enabled(ap->link.device))) |
b27dcfb0 | 3891 | rc = __ata_scsi_queuecmd(cmd, ap->link.device); |
80289167 BK |
3892 | else { |
3893 | cmd->result = (DID_BAD_TARGET << 16); | |
b27dcfb0 | 3894 | cmd->scsi_done(cmd); |
80289167 | 3895 | } |
08475a19 | 3896 | return rc; |
80289167 BK |
3897 | } |
3898 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |