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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
1da177e4 | 40 | #include <scsi/scsi_host.h> |
beb40487 | 41 | #include <scsi/scsi_cmnd.h> |
85837ebd | 42 | #include <scsi/scsi_eh.h> |
005a5a06 | 43 | #include <scsi/scsi_device.h> |
a6e6ce8e | 44 | #include <scsi/scsi_tcq.h> |
30afc84c | 45 | #include <scsi/scsi_transport.h> |
1da177e4 | 46 | #include <linux/libata.h> |
b095518e | 47 | #include <linux/hdreg.h> |
2dcb407e | 48 | #include <linux/uaccess.h> |
1da177e4 LT |
49 | |
50 | #include "libata.h" | |
51 | ||
87340e98 TH |
52 | #define SECTOR_SIZE 512 |
53 | #define ATA_SCSI_RBUF_SIZE 4096 | |
54 | ||
55 | static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); | |
56 | static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; | |
b095518e | 57 | |
ad706991 | 58 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); |
ab5b3a5b | 59 | |
2dcb407e | 60 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 61 | const struct scsi_device *scsidev); |
2dcb407e | 62 | static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 63 | const struct scsi_device *scsidev); |
83c47bcb TH |
64 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
65 | unsigned int id, unsigned int lun); | |
ab5b3a5b | 66 | |
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 | ||
30afc84c TH |
106 | /* |
107 | * libata transport template. libata doesn't do real transport stuff. | |
108 | * It just needs the eh_timed_out hook. | |
109 | */ | |
f3187195 | 110 | static struct scsi_transport_template ata_scsi_transport_template = { |
9227c33d | 111 | .eh_strategy_handler = ata_scsi_error, |
30afc84c | 112 | .eh_timed_out = ata_scsi_timed_out, |
ccf68c34 | 113 | .user_scan = ata_scsi_user_scan, |
30afc84c TH |
114 | }; |
115 | ||
1da177e4 | 116 | |
ca77329f KCA |
117 | static const struct { |
118 | enum link_pm value; | |
119 | const char *name; | |
120 | } link_pm_policy[] = { | |
121 | { NOT_AVAILABLE, "max_performance" }, | |
122 | { MIN_POWER, "min_power" }, | |
123 | { MAX_PERFORMANCE, "max_performance" }, | |
124 | { MEDIUM_POWER, "medium_power" }, | |
125 | }; | |
126 | ||
a2d6ed14 | 127 | static const char *ata_scsi_lpm_get(enum link_pm policy) |
ca77329f KCA |
128 | { |
129 | int i; | |
130 | ||
131 | for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++) | |
132 | if (link_pm_policy[i].value == policy) | |
133 | return link_pm_policy[i].name; | |
134 | ||
135 | return NULL; | |
136 | } | |
137 | ||
ee959b00 TJ |
138 | static ssize_t ata_scsi_lpm_put(struct device *dev, |
139 | struct device_attribute *attr, | |
140 | const char *buf, size_t count) | |
ca77329f | 141 | { |
ee959b00 | 142 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
143 | struct ata_port *ap = ata_shost_to_port(shost); |
144 | enum link_pm policy = 0; | |
145 | int i; | |
146 | ||
147 | /* | |
148 | * we are skipping array location 0 on purpose - this | |
149 | * is because a value of NOT_AVAILABLE is displayed | |
150 | * to the user as max_performance, but when the user | |
151 | * writes "max_performance", they actually want the | |
152 | * value to match MAX_PERFORMANCE. | |
153 | */ | |
154 | for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) { | |
155 | const int len = strlen(link_pm_policy[i].name); | |
156 | if (strncmp(link_pm_policy[i].name, buf, len) == 0 && | |
157 | buf[len] == '\n') { | |
158 | policy = link_pm_policy[i].value; | |
159 | break; | |
160 | } | |
161 | } | |
162 | if (!policy) | |
163 | return -EINVAL; | |
164 | ||
165 | ata_lpm_schedule(ap, policy); | |
166 | return count; | |
167 | } | |
168 | ||
169 | static ssize_t | |
ee959b00 | 170 | ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf) |
ca77329f | 171 | { |
ee959b00 | 172 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
173 | struct ata_port *ap = ata_shost_to_port(shost); |
174 | const char *policy = | |
175 | ata_scsi_lpm_get(ap->pm_policy); | |
176 | ||
177 | if (!policy) | |
178 | return -EINVAL; | |
179 | ||
180 | return snprintf(buf, 23, "%s\n", policy); | |
181 | } | |
ee959b00 | 182 | DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, |
ca77329f | 183 | ata_scsi_lpm_show, ata_scsi_lpm_put); |
ee959b00 | 184 | EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); |
ca77329f | 185 | |
f0761be3 TH |
186 | static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) |
187 | { | |
188 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
189 | ||
190 | scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); | |
191 | } | |
192 | ||
18f7ba4c KCA |
193 | static ssize_t |
194 | ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, | |
195 | const char *buf, size_t count) | |
196 | { | |
197 | struct Scsi_Host *shost = class_to_shost(dev); | |
198 | struct ata_port *ap = ata_shost_to_port(shost); | |
199 | if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) | |
200 | return ap->ops->em_store(ap, buf, count); | |
201 | return -EINVAL; | |
202 | } | |
203 | ||
204 | static ssize_t | |
205 | ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, | |
206 | char *buf) | |
207 | { | |
208 | struct Scsi_Host *shost = class_to_shost(dev); | |
209 | struct ata_port *ap = ata_shost_to_port(shost); | |
210 | ||
211 | if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) | |
212 | return ap->ops->em_show(ap, buf); | |
213 | return -EINVAL; | |
214 | } | |
215 | DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO, | |
216 | ata_scsi_em_message_show, ata_scsi_em_message_store); | |
217 | EXPORT_SYMBOL_GPL(dev_attr_em_message); | |
218 | ||
219 | static ssize_t | |
220 | ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, | |
221 | char *buf) | |
222 | { | |
223 | struct Scsi_Host *shost = class_to_shost(dev); | |
224 | struct ata_port *ap = ata_shost_to_port(shost); | |
225 | ||
226 | return snprintf(buf, 23, "%d\n", ap->em_message_type); | |
227 | } | |
228 | DEVICE_ATTR(em_message_type, S_IRUGO, | |
229 | ata_scsi_em_message_type_show, NULL); | |
230 | EXPORT_SYMBOL_GPL(dev_attr_em_message_type); | |
231 | ||
232 | static ssize_t | |
233 | ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, | |
234 | char *buf) | |
235 | { | |
236 | struct scsi_device *sdev = to_scsi_device(dev); | |
237 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
238 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
239 | ||
240 | if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY)) | |
241 | return ap->ops->sw_activity_show(atadev, buf); | |
242 | return -EINVAL; | |
243 | } | |
244 | ||
245 | static ssize_t | |
246 | ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, | |
247 | const char *buf, size_t count) | |
248 | { | |
249 | struct scsi_device *sdev = to_scsi_device(dev); | |
250 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
251 | struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); | |
252 | enum sw_activity val; | |
253 | int rc; | |
254 | ||
255 | if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) { | |
256 | val = simple_strtoul(buf, NULL, 0); | |
257 | switch (val) { | |
258 | case OFF: case BLINK_ON: case BLINK_OFF: | |
259 | rc = ap->ops->sw_activity_store(atadev, val); | |
260 | if (!rc) | |
261 | return count; | |
262 | else | |
263 | return rc; | |
264 | } | |
265 | } | |
266 | return -EINVAL; | |
267 | } | |
268 | DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show, | |
269 | ata_scsi_activity_store); | |
270 | EXPORT_SYMBOL_GPL(dev_attr_sw_activity); | |
271 | ||
ae006510 DG |
272 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
273 | void (*done)(struct scsi_cmnd *)) | |
274 | { | |
275 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
276 | /* "Invalid field in cbd" */ | |
277 | done(cmd); | |
278 | } | |
279 | ||
1da177e4 LT |
280 | /** |
281 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
282 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
283 | * @bdev: block device associated with @sdev | |
284 | * @capacity: capacity of SCSI device | |
285 | * @geom: location to which geometry will be output | |
286 | * | |
287 | * Generic bios head/sector/cylinder calculator | |
288 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
289 | * mapping. Some situations may arise where the disk is not | |
290 | * bootable if this is not used. | |
291 | * | |
292 | * LOCKING: | |
293 | * Defined by the SCSI layer. We don't really care. | |
294 | * | |
295 | * RETURNS: | |
296 | * Zero. | |
297 | */ | |
298 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
299 | sector_t capacity, int geom[]) | |
300 | { | |
301 | geom[0] = 255; | |
302 | geom[1] = 63; | |
303 | sector_div(capacity, 255*63); | |
304 | geom[2] = capacity; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
5924b74c TH |
309 | /** |
310 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
311 | * @sdev: SCSI device to get identify data for | |
312 | * @arg: User buffer area for identify data | |
313 | * | |
314 | * LOCKING: | |
315 | * Defined by the SCSI layer. We don't really care. | |
316 | * | |
317 | * RETURNS: | |
318 | * Zero on success, negative errno on error. | |
319 | */ | |
320 | static int ata_get_identity(struct scsi_device *sdev, void __user *arg) | |
321 | { | |
322 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
323 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
324 | u16 __user *dst = arg; | |
325 | char buf[40]; | |
326 | ||
327 | if (!dev) | |
328 | return -ENOMSG; | |
329 | ||
330 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
331 | return -EFAULT; | |
332 | ||
333 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
334 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
335 | return -EFAULT; | |
336 | ||
337 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
338 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
339 | return -EFAULT; | |
340 | ||
341 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
342 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
343 | return -EFAULT; | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
b095518e JG |
348 | /** |
349 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 350 | * @scsidev: Device to which we are issuing command |
b095518e JG |
351 | * @arg: User provided data for issuing command |
352 | * | |
353 | * LOCKING: | |
354 | * Defined by the SCSI layer. We don't really care. | |
355 | * | |
356 | * RETURNS: | |
357 | * Zero on success, negative errno on error. | |
358 | */ | |
b095518e JG |
359 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
360 | { | |
361 | int rc = 0; | |
362 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 363 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 364 | int argsize = 0; |
85837ebd | 365 | enum dma_data_direction data_dir; |
bbe1fe7e | 366 | int cmd_result; |
b095518e | 367 | |
c893a3ae | 368 | if (arg == NULL) |
b095518e JG |
369 | return -EINVAL; |
370 | ||
371 | if (copy_from_user(args, arg, sizeof(args))) | |
372 | return -EFAULT; | |
373 | ||
bbe1fe7e ET |
374 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
375 | if (!sensebuf) | |
376 | return -ENOMEM; | |
377 | ||
b095518e JG |
378 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
379 | ||
380 | if (args[3]) { | |
381 | argsize = SECTOR_SIZE * args[3]; | |
382 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
383 | if (argbuf == NULL) { |
384 | rc = -ENOMEM; | |
385 | goto error; | |
386 | } | |
b095518e JG |
387 | |
388 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
389 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
2dcb407e | 390 | block count in sector count field */ |
85837ebd | 391 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
392 | } else { |
393 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 394 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 395 | data_dir = DMA_NONE; |
b095518e JG |
396 | } |
397 | ||
398 | scsi_cmd[0] = ATA_16; | |
399 | ||
400 | scsi_cmd[4] = args[2]; | |
401 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
402 | scsi_cmd[6] = args[3]; | |
403 | scsi_cmd[8] = args[1]; | |
404 | scsi_cmd[10] = 0x4f; | |
405 | scsi_cmd[12] = 0xc2; | |
406 | } else { | |
407 | scsi_cmd[6] = args[1]; | |
408 | } | |
409 | scsi_cmd[14] = args[0]; | |
410 | ||
411 | /* Good values for timeout and retries? Values below | |
412 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e | 413 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
2dcb407e | 414 | sensebuf, (10*HZ), 5, 0); |
bbe1fe7e ET |
415 | |
416 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
417 | u8 *desc = sensebuf + 8; | |
418 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
419 | ||
420 | /* If we set cc then ATA pass-through will cause a | |
421 | * check condition even if no error. Filter that. */ | |
422 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
423 | struct scsi_sense_hdr sshdr; | |
424 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
2dcb407e JG |
425 | &sshdr); |
426 | if (sshdr.sense_key == 0 && | |
427 | sshdr.asc == 0 && sshdr.ascq == 0) | |
bbe1fe7e ET |
428 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
429 | } | |
430 | ||
431 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
2dcb407e JG |
432 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ |
433 | desc[0] == 0x09) { /* code is "ATA Descriptor" */ | |
434 | args[0] = desc[13]; /* status */ | |
435 | args[1] = desc[3]; /* error */ | |
436 | args[2] = desc[5]; /* sector count (0:7) */ | |
bbe1fe7e ET |
437 | if (copy_to_user(arg, args, sizeof(args))) |
438 | rc = -EFAULT; | |
439 | } | |
440 | } | |
441 | ||
442 | ||
443 | if (cmd_result) { | |
b095518e JG |
444 | rc = -EIO; |
445 | goto error; | |
446 | } | |
447 | ||
b095518e | 448 | if ((argbuf) |
c893a3ae | 449 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
450 | rc = -EFAULT; |
451 | error: | |
bbe1fe7e | 452 | kfree(sensebuf); |
8f760780 | 453 | kfree(argbuf); |
b095518e JG |
454 | return rc; |
455 | } | |
456 | ||
457 | /** | |
458 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 459 | * @scsidev: Device to which we are issuing command |
b095518e JG |
460 | * @arg: User provided data for issuing command |
461 | * | |
462 | * LOCKING: | |
463 | * Defined by the SCSI layer. We don't really care. | |
464 | * | |
465 | * RETURNS: | |
466 | * Zero on success, negative errno on error. | |
467 | */ | |
468 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
469 | { | |
470 | int rc = 0; | |
471 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
472 | u8 args[7], *sensebuf = NULL; |
473 | int cmd_result; | |
b095518e | 474 | |
c893a3ae | 475 | if (arg == NULL) |
b095518e JG |
476 | return -EINVAL; |
477 | ||
478 | if (copy_from_user(args, arg, sizeof(args))) | |
479 | return -EFAULT; | |
480 | ||
af068bd1 DM |
481 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
482 | if (!sensebuf) | |
483 | return -ENOMEM; | |
484 | ||
b095518e JG |
485 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
486 | scsi_cmd[0] = ATA_16; | |
487 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 488 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
489 | scsi_cmd[4] = args[1]; |
490 | scsi_cmd[6] = args[2]; | |
491 | scsi_cmd[8] = args[3]; | |
492 | scsi_cmd[10] = args[4]; | |
493 | scsi_cmd[12] = args[5]; | |
277239f2 | 494 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
495 | scsi_cmd[14] = args[0]; |
496 | ||
b095518e | 497 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 498 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 DM |
499 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
500 | sensebuf, (10*HZ), 5, 0); | |
501 | ||
502 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
503 | u8 *desc = sensebuf + 8; | |
504 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
505 | ||
506 | /* If we set cc then ATA pass-through will cause a | |
507 | * check condition even if no error. Filter that. */ | |
508 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
509 | struct scsi_sense_hdr sshdr; | |
510 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
511 | &sshdr); | |
2dcb407e JG |
512 | if (sshdr.sense_key == 0 && |
513 | sshdr.asc == 0 && sshdr.ascq == 0) | |
af068bd1 DM |
514 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
515 | } | |
516 | ||
517 | /* Send userspace ATA registers */ | |
518 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
519 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
520 | args[0] = desc[13]; /* status */ | |
521 | args[1] = desc[3]; /* error */ | |
522 | args[2] = desc[5]; /* sector count (0:7) */ | |
523 | args[3] = desc[7]; /* lbal */ | |
524 | args[4] = desc[9]; /* lbam */ | |
525 | args[5] = desc[11]; /* lbah */ | |
526 | args[6] = desc[12]; /* select */ | |
527 | if (copy_to_user(arg, args, sizeof(args))) | |
528 | rc = -EFAULT; | |
529 | } | |
530 | } | |
531 | ||
532 | if (cmd_result) { | |
b095518e | 533 | rc = -EIO; |
af068bd1 DM |
534 | goto error; |
535 | } | |
b095518e | 536 | |
af068bd1 DM |
537 | error: |
538 | kfree(sensebuf); | |
b095518e JG |
539 | return rc; |
540 | } | |
541 | ||
1da177e4 LT |
542 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
543 | { | |
1da177e4 LT |
544 | int val = -EINVAL, rc = -EINVAL; |
545 | ||
1da177e4 LT |
546 | switch (cmd) { |
547 | case ATA_IOC_GET_IO32: | |
548 | val = 0; | |
549 | if (copy_to_user(arg, &val, 1)) | |
550 | return -EFAULT; | |
551 | return 0; | |
552 | ||
553 | case ATA_IOC_SET_IO32: | |
554 | val = (unsigned long) arg; | |
555 | if (val != 0) | |
556 | return -EINVAL; | |
557 | return 0; | |
558 | ||
5924b74c TH |
559 | case HDIO_GET_IDENTITY: |
560 | return ata_get_identity(scsidev, arg); | |
561 | ||
b095518e JG |
562 | case HDIO_DRIVE_CMD: |
563 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
564 | return -EACCES; | |
565 | return ata_cmd_ioctl(scsidev, arg); | |
566 | ||
567 | case HDIO_DRIVE_TASK: | |
568 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
569 | return -EACCES; | |
570 | return ata_task_ioctl(scsidev, arg); | |
571 | ||
1da177e4 LT |
572 | default: |
573 | rc = -ENOTTY; | |
574 | break; | |
575 | } | |
576 | ||
1da177e4 LT |
577 | return rc; |
578 | } | |
579 | ||
580 | /** | |
581 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
582 | * @dev: ATA device to which the new command is attached |
583 | * @cmd: SCSI command that originated this ATA command | |
584 | * @done: SCSI command completion function | |
585 | * | |
586 | * Obtain a reference to an unused ata_queued_cmd structure, | |
587 | * which is the basic libata structure representing a single | |
588 | * ATA command sent to the hardware. | |
589 | * | |
590 | * If a command was available, fill in the SCSI-specific | |
591 | * portions of the structure with information on the | |
592 | * current command. | |
593 | * | |
594 | * LOCKING: | |
cca3974e | 595 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
596 | * |
597 | * RETURNS: | |
598 | * Command allocated, or %NULL if none available. | |
599 | */ | |
7102d230 AB |
600 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
601 | struct scsi_cmnd *cmd, | |
602 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
603 | { |
604 | struct ata_queued_cmd *qc; | |
605 | ||
3373efd8 | 606 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
607 | if (qc) { |
608 | qc->scsicmd = cmd; | |
609 | qc->scsidone = done; | |
610 | ||
ff2aeb1e | 611 | qc->sg = scsi_sglist(cmd); |
7120165c | 612 | qc->n_elem = scsi_sg_count(cmd); |
1da177e4 LT |
613 | } else { |
614 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
615 | done(cmd); | |
616 | } | |
617 | ||
618 | return qc; | |
619 | } | |
620 | ||
aacda375 TH |
621 | static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) |
622 | { | |
623 | struct scsi_cmnd *scmd = qc->scsicmd; | |
624 | ||
625 | qc->extrabytes = scmd->request->extra_len; | |
626 | qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; | |
627 | } | |
628 | ||
b095518e JG |
629 | /** |
630 | * ata_dump_status - user friendly display of error info | |
631 | * @id: id of the port in question | |
632 | * @tf: ptr to filled out taskfile | |
633 | * | |
634 | * Decode and dump the ATA error/status registers for the user so | |
635 | * that they have some idea what really happened at the non | |
636 | * make-believe layer. | |
637 | * | |
638 | * LOCKING: | |
639 | * inherited from caller | |
640 | */ | |
7102d230 | 641 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
642 | { |
643 | u8 stat = tf->command, err = tf->feature; | |
644 | ||
645 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
646 | if (stat & ATA_BUSY) { | |
647 | printk("Busy }\n"); /* Data is not valid in this case */ | |
648 | } else { | |
649 | if (stat & 0x40) printk("DriveReady "); | |
650 | if (stat & 0x20) printk("DeviceFault "); | |
651 | if (stat & 0x10) printk("SeekComplete "); | |
652 | if (stat & 0x08) printk("DataRequest "); | |
653 | if (stat & 0x04) printk("CorrectedError "); | |
654 | if (stat & 0x02) printk("Index "); | |
655 | if (stat & 0x01) printk("Error "); | |
656 | printk("}\n"); | |
657 | ||
658 | if (err) { | |
659 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
660 | if (err & 0x04) printk("DriveStatusError "); | |
661 | if (err & 0x80) { | |
662 | if (err & 0x04) printk("BadCRC "); | |
663 | else printk("Sector "); | |
664 | } | |
665 | if (err & 0x40) printk("UncorrectableError "); | |
666 | if (err & 0x10) printk("SectorIdNotFound "); | |
667 | if (err & 0x02) printk("TrackZeroNotFound "); | |
668 | if (err & 0x01) printk("AddrMarkNotFound "); | |
669 | printk("}\n"); | |
670 | } | |
671 | } | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /** |
675 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 676 | * @id: ATA device number |
1da177e4 | 677 | * @drv_stat: value contained in ATA status register |
b095518e JG |
678 | * @drv_err: value contained in ATA error register |
679 | * @sk: the sense key we'll fill out | |
680 | * @asc: the additional sense code we'll fill out | |
681 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 682 | * @verbose: be verbose |
1da177e4 | 683 | * |
b095518e JG |
684 | * Converts an ATA error into a SCSI error. Fill out pointers to |
685 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
686 | * format sense blocks. | |
1da177e4 LT |
687 | * |
688 | * LOCKING: | |
cca3974e | 689 | * spin_lock_irqsave(host lock) |
1da177e4 | 690 | */ |
7102d230 AB |
691 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
692 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 693 | { |
b095518e | 694 | int i; |
ffe75ef6 | 695 | |
1da177e4 | 696 | /* Based on the 3ware driver translation table */ |
98ac62de | 697 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
698 | /* BBD|ECC|ID|MAR */ |
699 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
700 | /* BBD|ECC|ID */ | |
701 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
702 | /* ECC|MC|MARK */ | |
703 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
704 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
705 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
706 | /* MC|ID|ABRT|TRK0|MARK */ | |
707 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
708 | /* MCR|MARK */ | |
709 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
710 | /* Bad address mark */ | |
711 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
712 | /* TRK0 */ | |
713 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
714 | /* Abort & !ICRC */ | |
715 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
716 | /* Media change request */ | |
717 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
718 | /* SRV */ | |
719 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
720 | /* Media change */ | |
721 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
722 | /* ECC */ | |
723 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
724 | /* BBD - block marked bad */ | |
725 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
726 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
727 | }; | |
98ac62de | 728 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
729 | /* Must be first because BUSY means no other bits valid */ |
730 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
731 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
732 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
733 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
734 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
735 | }; | |
1da177e4 | 736 | |
1da177e4 LT |
737 | /* |
738 | * Is this an error we can process/parse | |
739 | */ | |
b095518e JG |
740 | if (drv_stat & ATA_BUSY) { |
741 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 742 | } |
b095518e JG |
743 | |
744 | if (drv_err) { | |
745 | /* Look for drv_err */ | |
746 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
747 | /* Look for best matches first */ | |
2e9edbf8 | 748 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
749 | sense_table[i][0]) { |
750 | *sk = sense_table[i][1]; | |
751 | *asc = sense_table[i][2]; | |
752 | *ascq = sense_table[i][3]; | |
753 | goto translate_done; | |
754 | } | |
755 | } | |
756 | /* No immediate match */ | |
246619da TH |
757 | if (verbose) |
758 | printk(KERN_WARNING "ata%u: no sense translation for " | |
759 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 760 | } |
b095518e JG |
761 | |
762 | /* Fall back to interpreting status bits */ | |
763 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
764 | if (stat_table[i][0] & drv_stat) { | |
765 | *sk = stat_table[i][1]; | |
766 | *asc = stat_table[i][2]; | |
767 | *ascq = stat_table[i][3]; | |
768 | goto translate_done; | |
1da177e4 | 769 | } |
b095518e JG |
770 | } |
771 | /* No error? Undecoded? */ | |
246619da TH |
772 | if (verbose) |
773 | printk(KERN_WARNING "ata%u: no sense translation for " | |
774 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 775 | |
2d202024 AC |
776 | /* We need a sensible error return here, which is tricky, and one |
777 | that won't cause people to do things like return a disk wrongly */ | |
778 | *sk = ABORTED_COMMAND; | |
779 | *asc = 0x00; | |
780 | *ascq = 0x00; | |
b095518e JG |
781 | |
782 | translate_done: | |
246619da TH |
783 | if (verbose) |
784 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
785 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
786 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
787 | return; |
788 | } | |
789 | ||
790 | /* | |
750426aa | 791 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
792 | * @qc: Command that completed. |
793 | * | |
794 | * This function is specific to the ATA descriptor format sense | |
795 | * block specified for the ATA pass through commands. Regardless | |
796 | * of whether the command errored or not, return a sense | |
797 | * block. Copy all controller registers into the sense | |
798 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
799 | * | |
800 | * LOCKING: | |
750426aa | 801 | * None. |
b095518e | 802 | */ |
750426aa | 803 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
804 | { |
805 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 806 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
807 | unsigned char *sb = cmd->sense_buffer; |
808 | unsigned char *desc = sb + 8; | |
246619da | 809 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
810 | |
811 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
812 | ||
0e5dec47 | 813 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 814 | |
b095518e JG |
815 | /* |
816 | * Use ata_to_sense_error() to map status register bits | |
817 | * onto sense key, asc & ascq. | |
818 | */ | |
058e55e1 TH |
819 | if (qc->err_mask || |
820 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 821 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 822 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 823 | sb[1] &= 0x0f; |
1da177e4 LT |
824 | } |
825 | ||
b095518e JG |
826 | /* |
827 | * Sense data is current and format is descriptor. | |
828 | */ | |
829 | sb[0] = 0x72; | |
1da177e4 | 830 | |
b095518e JG |
831 | desc[0] = 0x09; |
832 | ||
f38621b3 TH |
833 | /* set length of additional sense data */ |
834 | sb[7] = 14; | |
835 | desc[1] = 12; | |
b095518e JG |
836 | |
837 | /* | |
838 | * Copy registers into sense buffer. | |
839 | */ | |
840 | desc[2] = 0x00; | |
841 | desc[3] = tf->feature; /* == error reg */ | |
842 | desc[5] = tf->nsect; | |
843 | desc[7] = tf->lbal; | |
844 | desc[9] = tf->lbam; | |
845 | desc[11] = tf->lbah; | |
846 | desc[12] = tf->device; | |
847 | desc[13] = tf->command; /* == status reg */ | |
848 | ||
849 | /* | |
850 | * Fill in Extend bit, and the high order bytes | |
851 | * if applicable. | |
852 | */ | |
853 | if (tf->flags & ATA_TFLAG_LBA48) { | |
854 | desc[2] |= 0x01; | |
855 | desc[4] = tf->hob_nsect; | |
856 | desc[6] = tf->hob_lbal; | |
857 | desc[8] = tf->hob_lbam; | |
858 | desc[10] = tf->hob_lbah; | |
1da177e4 | 859 | } |
b095518e | 860 | } |
1da177e4 | 861 | |
b095518e | 862 | /** |
750426aa | 863 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
864 | * @qc: Command that we are erroring out |
865 | * | |
d25614ba TH |
866 | * Generate sense block for a failed ATA command @qc. Descriptor |
867 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
868 | * |
869 | * LOCKING: | |
750426aa | 870 | * None. |
b095518e | 871 | */ |
750426aa | 872 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 873 | { |
d25614ba | 874 | struct ata_device *dev = qc->dev; |
b095518e | 875 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 876 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 877 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 878 | unsigned char *desc = sb + 8; |
246619da | 879 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 880 | u64 block; |
b095518e JG |
881 | |
882 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
883 | ||
0e5dec47 | 884 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 885 | |
d25614ba TH |
886 | /* sense data is current and format is descriptor */ |
887 | sb[0] = 0x72; | |
888 | ||
889 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
890 | * onto sense key, asc & ascq. |
891 | */ | |
058e55e1 TH |
892 | if (qc->err_mask || |
893 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 894 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
895 | &sb[1], &sb[2], &sb[3], verbose); |
896 | sb[1] &= 0x0f; | |
1da177e4 | 897 | } |
1da177e4 | 898 | |
d25614ba | 899 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 900 | |
d25614ba TH |
901 | /* information sense data descriptor */ |
902 | sb[7] = 12; | |
903 | desc[0] = 0x00; | |
904 | desc[1] = 10; | |
a7dac447 | 905 | |
d25614ba TH |
906 | desc[2] |= 0x80; /* valid */ |
907 | desc[6] = block >> 40; | |
908 | desc[7] = block >> 32; | |
909 | desc[8] = block >> 24; | |
910 | desc[9] = block >> 16; | |
911 | desc[10] = block >> 8; | |
912 | desc[11] = block; | |
1da177e4 LT |
913 | } |
914 | ||
a6cce2a7 BK |
915 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
916 | { | |
917 | sdev->use_10_for_rw = 1; | |
918 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
919 | |
920 | /* Schedule policy is determined by ->qc_defer() callback and | |
921 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
922 | * prevent SCSI midlayer from automatically deferring | |
923 | * requests. | |
924 | */ | |
925 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
926 | } |
927 | ||
fa2fc7f4 JB |
928 | /** |
929 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 930 | * @rq: request to be checked |
fa2fc7f4 JB |
931 | * |
932 | * ATAPI commands which transfer variable length data to host | |
933 | * might overflow due to application error or hardare bug. This | |
934 | * function checks whether overflow should be drained and ignored | |
935 | * for @request. | |
936 | * | |
937 | * LOCKING: | |
938 | * None. | |
939 | * | |
940 | * RETURNS: | |
941 | * 1 if ; otherwise, 0. | |
942 | */ | |
943 | static int atapi_drain_needed(struct request *rq) | |
944 | { | |
945 | if (likely(!blk_pc_request(rq))) | |
946 | return 0; | |
947 | ||
948 | if (!rq->data_len || (rq->cmd_flags & REQ_RW)) | |
949 | return 0; | |
950 | ||
951 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
952 | } | |
953 | ||
954 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
955 | struct ata_device *dev) | |
a6cce2a7 | 956 | { |
914ed354 TH |
957 | /* configure max sectors */ |
958 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 959 | |
fa2fc7f4 JB |
960 | if (dev->class == ATA_DEV_ATAPI) { |
961 | struct request_queue *q = sdev->request_queue; | |
962 | void *buf; | |
963 | ||
e3790c7d | 964 | /* set the min alignment and padding */ |
d0ad3bc9 JB |
965 | blk_queue_update_dma_alignment(sdev->request_queue, |
966 | ATA_DMA_PAD_SZ - 1); | |
27f8221a FT |
967 | blk_queue_update_dma_pad(sdev->request_queue, |
968 | ATA_DMA_PAD_SZ - 1); | |
fa2fc7f4 JB |
969 | |
970 | /* configure draining */ | |
971 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
972 | if (!buf) { | |
973 | ata_dev_printk(dev, KERN_ERR, | |
974 | "drain buffer allocation failed\n"); | |
975 | return -ENOMEM; | |
976 | } | |
977 | ||
978 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
979 | } else { | |
d0ad3bc9 JB |
980 | /* ATA devices must be sector aligned */ |
981 | blk_queue_update_dma_alignment(sdev->request_queue, | |
982 | ATA_SECT_SIZE - 1); | |
d8cf5389 | 983 | sdev->manage_start_stop = 1; |
dde20207 | 984 | } |
d8cf5389 | 985 | |
f26792d5 JG |
986 | if (dev->flags & ATA_DFLAG_AN) |
987 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
988 | ||
a6e6ce8e TH |
989 | if (dev->flags & ATA_DFLAG_NCQ) { |
990 | int depth; | |
991 | ||
992 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
993 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
994 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
995 | } | |
fa2fc7f4 JB |
996 | |
997 | return 0; | |
a6cce2a7 BK |
998 | } |
999 | ||
1da177e4 LT |
1000 | /** |
1001 | * ata_scsi_slave_config - Set SCSI device attributes | |
1002 | * @sdev: SCSI device to examine | |
1003 | * | |
1004 | * This is called before we actually start reading | |
1005 | * and writing to the device, to configure certain | |
1006 | * SCSI mid-layer behaviors. | |
1007 | * | |
1008 | * LOCKING: | |
1009 | * Defined by SCSI layer. We don't really care. | |
1010 | */ | |
1011 | ||
1012 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
1013 | { | |
31534363 TH |
1014 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
1015 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 1016 | int rc = 0; |
31534363 | 1017 | |
a6cce2a7 | 1018 | ata_scsi_sdev_config(sdev); |
1da177e4 | 1019 | |
31534363 | 1020 | if (dev) |
fa2fc7f4 | 1021 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 1022 | |
fa2fc7f4 | 1023 | return rc; |
1da177e4 LT |
1024 | } |
1025 | ||
83c47bcb TH |
1026 | /** |
1027 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
1028 | * @sdev: SCSI device to be destroyed | |
1029 | * | |
1030 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
1031 | * this unplugging was initiated by libata as indicated by NULL | |
1032 | * dev->sdev, this function doesn't have to do anything. | |
1033 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
1034 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
1035 | * EH. | |
1036 | * | |
1037 | * LOCKING: | |
1038 | * Defined by SCSI layer. We don't really care. | |
1039 | */ | |
1040 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
1041 | { | |
1042 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 1043 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
1044 | unsigned long flags; |
1045 | struct ata_device *dev; | |
1046 | ||
1047 | if (!ap->ops->error_handler) | |
1048 | return; | |
1049 | ||
ba6a1308 | 1050 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
1051 | dev = __ata_scsi_find_dev(ap, sdev); |
1052 | if (dev && dev->sdev) { | |
1053 | /* SCSI device already in CANCEL state, no need to offline it */ | |
1054 | dev->sdev = NULL; | |
1055 | dev->flags |= ATA_DFLAG_DETACH; | |
1056 | ata_port_schedule_eh(ap); | |
1057 | } | |
ba6a1308 | 1058 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
1059 | |
1060 | kfree(q->dma_drain_buffer); | |
1061 | q->dma_drain_buffer = NULL; | |
1062 | q->dma_drain_size = 0; | |
83c47bcb TH |
1063 | } |
1064 | ||
a6e6ce8e TH |
1065 | /** |
1066 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
1067 | * @sdev: SCSI device to configure queue depth for | |
1068 | * @queue_depth: new queue depth | |
1069 | * | |
1070 | * This is libata standard hostt->change_queue_depth callback. | |
1071 | * SCSI will call into this callback when user tries to set queue | |
1072 | * depth via sysfs. | |
1073 | * | |
1074 | * LOCKING: | |
1075 | * SCSI layer (we don't care) | |
1076 | * | |
1077 | * RETURNS: | |
1078 | * Newly configured queue depth. | |
1079 | */ | |
1080 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
1081 | { | |
1082 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
1083 | struct ata_device *dev; | |
360f654e | 1084 | unsigned long flags; |
a6e6ce8e | 1085 | |
c3c70c44 | 1086 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
1087 | return sdev->queue_depth; |
1088 | ||
1089 | dev = ata_scsi_find_dev(ap, sdev); | |
1090 | if (!dev || !ata_dev_enabled(dev)) | |
1091 | return sdev->queue_depth; | |
1092 | ||
c3c70c44 | 1093 | /* NCQ enabled? */ |
360f654e | 1094 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
1095 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
1096 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 1097 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
1098 | queue_depth = 1; |
1099 | } | |
360f654e TH |
1100 | spin_unlock_irqrestore(ap->lock, flags); |
1101 | ||
c3c70c44 TH |
1102 | /* limit and apply queue depth */ |
1103 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1104 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1105 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1106 | ||
1107 | if (sdev->queue_depth == queue_depth) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1111 | return queue_depth; |
1112 | } | |
1113 | ||
d9aca22c | 1114 | /* XXX: for spindown warning */ |
da071b42 TH |
1115 | static void ata_delayed_done_timerfn(unsigned long arg) |
1116 | { | |
1117 | struct scsi_cmnd *scmd = (void *)arg; | |
1118 | ||
1119 | scmd->scsi_done(scmd); | |
1120 | } | |
1121 | ||
d9aca22c | 1122 | /* XXX: for spindown warning */ |
da071b42 TH |
1123 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
1124 | { | |
1125 | static struct timer_list timer; | |
1126 | ||
1127 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
1128 | mod_timer(&timer, jiffies + 5 * HZ); | |
1129 | } | |
1130 | ||
972dcafb DG |
1131 | /** |
1132 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1133 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1134 | * |
1135 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1136 | * (to start). Perhaps these commands should be preceded by | |
1137 | * CHECK POWER MODE to see what power mode the device is already in. | |
1138 | * [See SAT revision 5 at www.t10.org] | |
1139 | * | |
1140 | * LOCKING: | |
cca3974e | 1141 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1142 | * |
1143 | * RETURNS: | |
1144 | * Zero on success, non-zero on error. | |
1145 | */ | |
ad706991 | 1146 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1147 | { |
542b1444 | 1148 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1149 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1150 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1151 | |
2e5704f6 TH |
1152 | if (scmd->cmd_len < 5) |
1153 | goto invalid_fld; | |
1154 | ||
972dcafb DG |
1155 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1156 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1157 | if (cdb[1] & 0x1) { |
972dcafb DG |
1158 | ; /* ignore IMMED bit, violates sat-r05 */ |
1159 | } | |
542b1444 | 1160 | if (cdb[4] & 0x2) |
ae006510 | 1161 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1162 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1163 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 | 1164 | |
542b1444 | 1165 | if (cdb[4] & 0x1) { |
972dcafb | 1166 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1167 | |
1168 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1169 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1170 | |
1171 | tf->lbah = 0x0; | |
1172 | tf->lbam = 0x0; | |
1173 | tf->lbal = 0x0; | |
1174 | tf->device |= ATA_LBA; | |
1175 | } else { | |
1176 | /* CHS */ | |
1177 | tf->lbal = 0x1; /* sect */ | |
1178 | tf->lbam = 0x0; /* cyl low */ | |
1179 | tf->lbah = 0x0; /* cyl high */ | |
1180 | } | |
1181 | ||
972dcafb | 1182 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 TH |
1183 | } else { |
1184 | /* XXX: This is for backward compatibility, will be | |
1185 | * removed. Read Documentation/feature-removal-schedule.txt | |
1186 | * for more info. | |
1187 | */ | |
d9aca22c | 1188 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
1189 | (system_state == SYSTEM_HALT || |
1190 | system_state == SYSTEM_POWER_OFF)) { | |
2dcb407e | 1191 | static unsigned long warned; |
920a4b10 | 1192 | |
da071b42 | 1193 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
1194 | ata_dev_printk(qc->dev, KERN_WARNING, |
1195 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
1196 | "UPDATE SHUTDOWN UTILITY\n"); | |
1197 | ata_dev_printk(qc->dev, KERN_WARNING, | |
1198 | "For more info, visit " | |
1199 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
1200 | |
1201 | /* ->scsi_done is not used, use it for | |
1202 | * delayed completion. | |
1203 | */ | |
1204 | scmd->scsi_done = qc->scsidone; | |
1205 | qc->scsidone = ata_delayed_done; | |
920a4b10 TH |
1206 | } |
1207 | scmd->result = SAM_STAT_GOOD; | |
1208 | return 1; | |
1209 | } | |
1210 | ||
78981a7c RH |
1211 | /* Issue ATA STANDBY IMMEDIATE command */ |
1212 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1213 | } |
78981a7c | 1214 | |
972dcafb DG |
1215 | /* |
1216 | * Standby and Idle condition timers could be implemented but that | |
1217 | * would require libata to implement the Power condition mode page | |
1218 | * and allow the user to change it. Changing mode pages requires | |
1219 | * MODE SELECT to be implemented. | |
1220 | */ | |
1221 | ||
1222 | return 0; | |
ae006510 DG |
1223 | |
1224 | invalid_fld: | |
542b1444 | 1225 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1226 | /* "Invalid field in cbd" */ |
1227 | return 1; | |
972dcafb DG |
1228 | } |
1229 | ||
1230 | ||
1da177e4 LT |
1231 | /** |
1232 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1233 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1234 | * |
1235 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1236 | * FLUSH CACHE EXT. | |
1237 | * | |
1238 | * LOCKING: | |
cca3974e | 1239 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1240 | * |
1241 | * RETURNS: | |
1242 | * Zero on success, non-zero on error. | |
1243 | */ | |
ad706991 | 1244 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1245 | { |
1246 | struct ata_taskfile *tf = &qc->tf; | |
1247 | ||
1248 | tf->flags |= ATA_TFLAG_DEVICE; | |
1249 | tf->protocol = ATA_PROT_NODATA; | |
1250 | ||
6fc49adb | 1251 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1252 | tf->command = ATA_CMD_FLUSH_EXT; |
1253 | else | |
1254 | tf->command = ATA_CMD_FLUSH; | |
1255 | ||
b666da35 TH |
1256 | /* flush is critical for IO integrity, consider it an IO command */ |
1257 | qc->flags |= ATA_QCFLAG_IO; | |
1258 | ||
1da177e4 LT |
1259 | return 0; |
1260 | } | |
1261 | ||
3aef5231 AL |
1262 | /** |
1263 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1264 | * @cdb: SCSI command to translate |
3aef5231 AL |
1265 | * |
1266 | * Calculate LBA and transfer length for 6-byte commands. | |
1267 | * | |
1268 | * RETURNS: | |
1269 | * @plba: the LBA | |
1270 | * @plen: the transfer length | |
1271 | */ | |
542b1444 | 1272 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1273 | { |
1274 | u64 lba = 0; | |
6c7b7d2b | 1275 | u32 len; |
3aef5231 AL |
1276 | |
1277 | VPRINTK("six-byte command\n"); | |
1278 | ||
6c7b7d2b | 1279 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1280 | lba |= ((u64)cdb[2]) << 8; |
1281 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1282 | |
6c7b7d2b | 1283 | len = cdb[4]; |
3aef5231 AL |
1284 | |
1285 | *plba = lba; | |
1286 | *plen = len; | |
1287 | } | |
1288 | ||
1289 | /** | |
1290 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1291 | * @cdb: SCSI command to translate |
3aef5231 AL |
1292 | * |
1293 | * Calculate LBA and transfer length for 10-byte commands. | |
1294 | * | |
1295 | * RETURNS: | |
1296 | * @plba: the LBA | |
1297 | * @plen: the transfer length | |
1298 | */ | |
542b1444 | 1299 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1300 | { |
1301 | u64 lba = 0; | |
1302 | u32 len = 0; | |
1303 | ||
1304 | VPRINTK("ten-byte command\n"); | |
1305 | ||
542b1444 TH |
1306 | lba |= ((u64)cdb[2]) << 24; |
1307 | lba |= ((u64)cdb[3]) << 16; | |
1308 | lba |= ((u64)cdb[4]) << 8; | |
1309 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1310 | |
542b1444 TH |
1311 | len |= ((u32)cdb[7]) << 8; |
1312 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1313 | |
1314 | *plba = lba; | |
1315 | *plen = len; | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1320 | * @cdb: SCSI command to translate |
3aef5231 AL |
1321 | * |
1322 | * Calculate LBA and transfer length for 16-byte commands. | |
1323 | * | |
1324 | * RETURNS: | |
1325 | * @plba: the LBA | |
1326 | * @plen: the transfer length | |
1327 | */ | |
542b1444 | 1328 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1329 | { |
1330 | u64 lba = 0; | |
1331 | u32 len = 0; | |
1332 | ||
1333 | VPRINTK("sixteen-byte command\n"); | |
1334 | ||
542b1444 TH |
1335 | lba |= ((u64)cdb[2]) << 56; |
1336 | lba |= ((u64)cdb[3]) << 48; | |
1337 | lba |= ((u64)cdb[4]) << 40; | |
1338 | lba |= ((u64)cdb[5]) << 32; | |
1339 | lba |= ((u64)cdb[6]) << 24; | |
1340 | lba |= ((u64)cdb[7]) << 16; | |
1341 | lba |= ((u64)cdb[8]) << 8; | |
1342 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1343 | |
542b1444 TH |
1344 | len |= ((u32)cdb[10]) << 24; |
1345 | len |= ((u32)cdb[11]) << 16; | |
1346 | len |= ((u32)cdb[12]) << 8; | |
1347 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1348 | |
1349 | *plba = lba; | |
1350 | *plen = len; | |
1351 | } | |
1352 | ||
1da177e4 LT |
1353 | /** |
1354 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1355 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1356 | * |
1357 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1358 | * | |
1359 | * LOCKING: | |
cca3974e | 1360 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1361 | * |
1362 | * RETURNS: | |
1363 | * Zero on success, non-zero on error. | |
1364 | */ | |
ad706991 | 1365 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1366 | { |
542b1444 | 1367 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1368 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1369 | struct ata_device *dev = qc->dev; |
1da177e4 | 1370 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1371 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1372 | u64 block; |
1373 | u32 n_block; | |
1da177e4 LT |
1374 | |
1375 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1376 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1377 | |
2e5704f6 TH |
1378 | if (cdb[0] == VERIFY) { |
1379 | if (scmd->cmd_len < 10) | |
1380 | goto invalid_fld; | |
542b1444 | 1381 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1382 | } else if (cdb[0] == VERIFY_16) { |
1383 | if (scmd->cmd_len < 16) | |
1384 | goto invalid_fld; | |
542b1444 | 1385 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1386 | } else |
ae006510 | 1387 | goto invalid_fld; |
1da177e4 | 1388 | |
8bf62ece | 1389 | if (!n_block) |
ae006510 | 1390 | goto nothing_to_do; |
8bf62ece | 1391 | if (block >= dev_sectors) |
ae006510 | 1392 | goto out_of_range; |
8bf62ece | 1393 | if ((block + n_block) > dev_sectors) |
ae006510 | 1394 | goto out_of_range; |
1da177e4 | 1395 | |
07506697 AL |
1396 | if (dev->flags & ATA_DFLAG_LBA) { |
1397 | tf->flags |= ATA_TFLAG_LBA; | |
1398 | ||
c6a33e24 AL |
1399 | if (lba_28_ok(block, n_block)) { |
1400 | /* use LBA28 */ | |
1401 | tf->command = ATA_CMD_VERIFY; | |
1402 | tf->device |= (block >> 24) & 0xf; | |
1403 | } else if (lba_48_ok(block, n_block)) { | |
1404 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1405 | goto out_of_range; | |
07506697 AL |
1406 | |
1407 | /* use LBA48 */ | |
1408 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1409 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1410 | |
8bf62ece | 1411 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1412 | |
8bf62ece AL |
1413 | tf->hob_lbah = (block >> 40) & 0xff; |
1414 | tf->hob_lbam = (block >> 32) & 0xff; | |
1415 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1416 | } else |
1417 | /* request too large even for LBA48 */ | |
1418 | goto out_of_range; | |
8bf62ece AL |
1419 | |
1420 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1421 | |
8bf62ece AL |
1422 | tf->lbah = (block >> 16) & 0xff; |
1423 | tf->lbam = (block >> 8) & 0xff; | |
1424 | tf->lbal = block & 0xff; | |
1da177e4 | 1425 | |
8bf62ece AL |
1426 | tf->device |= ATA_LBA; |
1427 | } else { | |
1428 | /* CHS */ | |
1429 | u32 sect, head, cyl, track; | |
1430 | ||
c6a33e24 AL |
1431 | if (!lba_28_ok(block, n_block)) |
1432 | goto out_of_range; | |
07506697 | 1433 | |
8bf62ece AL |
1434 | /* Convert LBA to CHS */ |
1435 | track = (u32)block / dev->sectors; | |
1436 | cyl = track / dev->heads; | |
1437 | head = track % dev->heads; | |
1438 | sect = (u32)block % dev->sectors + 1; | |
1439 | ||
c187c4b5 AL |
1440 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1441 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1442 | |
1443 | /* Check whether the converted CHS can fit. | |
1444 | Cylinder: 0-65535 | |
8bf62ece AL |
1445 | Head: 0-15 |
1446 | Sector: 1-255*/ | |
2e9edbf8 | 1447 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1448 | goto out_of_range; |
2e9edbf8 | 1449 | |
8bf62ece AL |
1450 | tf->command = ATA_CMD_VERIFY; |
1451 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1452 | tf->lbal = sect; | |
1453 | tf->lbam = cyl; | |
1454 | tf->lbah = cyl >> 8; | |
1455 | tf->device |= head; | |
1456 | } | |
1da177e4 LT |
1457 | |
1458 | return 0; | |
ae006510 DG |
1459 | |
1460 | invalid_fld: | |
542b1444 | 1461 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1462 | /* "Invalid field in cbd" */ |
1463 | return 1; | |
1464 | ||
1465 | out_of_range: | |
542b1444 | 1466 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1467 | /* "Logical Block Address out of range" */ |
1468 | return 1; | |
1469 | ||
1470 | nothing_to_do: | |
542b1444 | 1471 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1472 | return 1; |
1da177e4 LT |
1473 | } |
1474 | ||
1475 | /** | |
1476 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1477 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1478 | * |
1479 | * Converts any of six SCSI read/write commands into the | |
1480 | * ATA counterpart, including starting sector (LBA), | |
1481 | * sector count, and taking into account the device's LBA48 | |
1482 | * support. | |
1483 | * | |
1484 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1485 | * %WRITE_16 are currently supported. | |
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_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1494 | { |
542b1444 | 1495 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1496 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1497 | unsigned int tf_flags = 0; |
3aef5231 AL |
1498 | u64 block; |
1499 | u32 n_block; | |
bd056d7e | 1500 | int rc; |
1da177e4 | 1501 | |
542b1444 | 1502 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1503 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1504 | |
9a3dccc4 | 1505 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1506 | switch (cdb[0]) { |
3aef5231 AL |
1507 | case READ_10: |
1508 | case WRITE_10: | |
2e5704f6 TH |
1509 | if (unlikely(scmd->cmd_len < 10)) |
1510 | goto invalid_fld; | |
542b1444 TH |
1511 | scsi_10_lba_len(cdb, &block, &n_block); |
1512 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1513 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1514 | break; |
1515 | case READ_6: | |
1516 | case WRITE_6: | |
2e5704f6 TH |
1517 | if (unlikely(scmd->cmd_len < 6)) |
1518 | goto invalid_fld; | |
542b1444 | 1519 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1520 | |
1521 | /* for 6-byte r/w commands, transfer length 0 | |
1522 | * means 256 blocks of data, not 0 block. | |
1523 | */ | |
76b2bf9b JG |
1524 | if (!n_block) |
1525 | n_block = 256; | |
3aef5231 AL |
1526 | break; |
1527 | case READ_16: | |
1528 | case WRITE_16: | |
2e5704f6 TH |
1529 | if (unlikely(scmd->cmd_len < 16)) |
1530 | goto invalid_fld; | |
542b1444 TH |
1531 | scsi_16_lba_len(cdb, &block, &n_block); |
1532 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1533 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1534 | break; |
1535 | default: | |
8bf62ece | 1536 | DPRINTK("no-byte command\n"); |
ae006510 | 1537 | goto invalid_fld; |
1da177e4 LT |
1538 | } |
1539 | ||
8bf62ece AL |
1540 | /* Check and compose ATA command */ |
1541 | if (!n_block) | |
c187c4b5 AL |
1542 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1543 | * length 0 means transfer 0 block of data. | |
1544 | * However, for ATA R/W commands, sector count 0 means | |
1545 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1546 | * |
1547 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1548 | */ |
ae006510 | 1549 | goto nothing_to_do; |
1da177e4 | 1550 | |
bd056d7e | 1551 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1552 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1553 | |
bd056d7e TH |
1554 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1555 | qc->tag); | |
1556 | if (likely(rc == 0)) | |
1557 | return 0; | |
ae006510 | 1558 | |
bd056d7e TH |
1559 | if (rc == -ERANGE) |
1560 | goto out_of_range; | |
1561 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1562 | invalid_fld: |
542b1444 | 1563 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1564 | /* "Invalid field in cbd" */ |
1565 | return 1; | |
1566 | ||
1567 | out_of_range: | |
542b1444 | 1568 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1569 | /* "Logical Block Address out of range" */ |
1570 | return 1; | |
1571 | ||
1572 | nothing_to_do: | |
542b1444 | 1573 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1574 | return 1; |
1da177e4 LT |
1575 | } |
1576 | ||
77853bf2 | 1577 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1578 | { |
c31f571d | 1579 | struct ata_port *ap = qc->ap; |
1da177e4 | 1580 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1581 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1582 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1583 | |
1584 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1585 | * user mandated it or if there's an error. Note that if we | |
1586 | * generate because the user forced us to, a check condition | |
1587 | * is generated and the ATA register values are returned | |
1588 | * whether the command completed successfully or not. If there | |
1589 | * was no error, SK, ASC and ASCQ will all be zero. | |
1590 | */ | |
a7dac447 | 1591 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1592 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1593 | ata_gen_passthru_sense(qc); |
b095518e JG |
1594 | } else { |
1595 | if (!need_sense) { | |
1596 | cmd->result = SAM_STAT_GOOD; | |
1597 | } else { | |
1598 | /* TODO: decide which descriptor format to use | |
1599 | * for 48b LBA devices and call that here | |
1600 | * instead of the fixed desc, which is only | |
1601 | * good for smaller LBA (and maybe CHS?) | |
1602 | * devices. | |
1603 | */ | |
750426aa | 1604 | ata_gen_ata_sense(qc); |
b095518e JG |
1605 | } |
1606 | } | |
1da177e4 | 1607 | |
d9aca22c | 1608 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1609 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1610 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1611 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1612 | else if (likely(system_state != SYSTEM_HALT && | |
1613 | system_state != SYSTEM_POWER_OFF)) | |
1614 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1615 | ||
c31f571d | 1616 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1617 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1618 | |
1619 | qc->scsidone(cmd); | |
1620 | ||
77853bf2 | 1621 | ata_qc_free(qc); |
1da177e4 LT |
1622 | } |
1623 | ||
1624 | /** | |
1625 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1626 | * @dev: ATA device to which the command is addressed |
1627 | * @cmd: SCSI command to execute | |
1628 | * @done: SCSI command completion function | |
1629 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1630 | * | |
1631 | * Our ->queuecommand() function has decided that the SCSI | |
1632 | * command issued can be directly translated into an ATA | |
1633 | * command, rather than handled internally. | |
1634 | * | |
1635 | * This function sets up an ata_queued_cmd structure for the | |
1636 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1637 | * | |
ae006510 DG |
1638 | * The xlat_func argument (actor) returns 0 if ready to execute |
1639 | * ATA command, else 1 to finish translation. If 1 is returned | |
1640 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1641 | * to be set reflecting an error condition or clean (early) | |
1642 | * termination. | |
1643 | * | |
1da177e4 | 1644 | * LOCKING: |
cca3974e | 1645 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1646 | * |
1647 | * RETURNS: | |
1648 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1649 | * needs to be deferred. | |
1da177e4 | 1650 | */ |
2115ea94 TH |
1651 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1652 | void (*done)(struct scsi_cmnd *), | |
1653 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1654 | { |
31cc23b3 | 1655 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1656 | struct ata_queued_cmd *qc; |
31cc23b3 | 1657 | int rc; |
1da177e4 LT |
1658 | |
1659 | VPRINTK("ENTER\n"); | |
1660 | ||
3373efd8 | 1661 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1662 | if (!qc) |
ae006510 | 1663 | goto err_mem; |
1da177e4 LT |
1664 | |
1665 | /* data is present; dma-map it */ | |
be7db055 | 1666 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1667 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1668 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1669 | ata_dev_printk(dev, KERN_WARNING, |
1670 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1671 | goto err_did; |
1da177e4 LT |
1672 | } |
1673 | ||
7120165c | 1674 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1675 | |
1676 | qc->dma_dir = cmd->sc_data_direction; | |
1677 | } | |
1678 | ||
1679 | qc->complete_fn = ata_scsi_qc_complete; | |
1680 | ||
ad706991 | 1681 | if (xlat_func(qc)) |
ae006510 | 1682 | goto early_finish; |
1da177e4 | 1683 | |
31cc23b3 TH |
1684 | if (ap->ops->qc_defer) { |
1685 | if ((rc = ap->ops->qc_defer(qc))) | |
1686 | goto defer; | |
1687 | } | |
1688 | ||
1da177e4 | 1689 | /* select device, send command to hardware */ |
8e0e694a | 1690 | ata_qc_issue(qc); |
1da177e4 LT |
1691 | |
1692 | VPRINTK("EXIT\n"); | |
2115ea94 | 1693 | return 0; |
1da177e4 | 1694 | |
ae006510 | 1695 | early_finish: |
2dcb407e | 1696 | ata_qc_free(qc); |
da071b42 | 1697 | qc->scsidone(cmd); |
ae006510 | 1698 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1699 | return 0; |
ae006510 DG |
1700 | |
1701 | err_did: | |
1da177e4 | 1702 | ata_qc_free(qc); |
ae006510 | 1703 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1704 | qc->scsidone(cmd); |
253b92ec | 1705 | err_mem: |
ae006510 | 1706 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1707 | return 0; |
3dc1d881 TH |
1708 | |
1709 | defer: | |
31cc23b3 | 1710 | ata_qc_free(qc); |
3dc1d881 | 1711 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1712 | if (rc == ATA_DEFER_LINK) |
1713 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1714 | else | |
1715 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1716 | } |
1717 | ||
1718 | /** | |
1719 | * ata_scsi_rbuf_get - Map response buffer. | |
ec2a20e6 | 1720 | * @cmd: SCSI command containing buffer to be mapped. |
87340e98 TH |
1721 | * @flags: unsigned long variable to store irq enable status |
1722 | * @copy_in: copy in from user buffer | |
1da177e4 | 1723 | * |
87340e98 | 1724 | * Prepare buffer for simulated SCSI commands. |
1da177e4 LT |
1725 | * |
1726 | * LOCKING: | |
87340e98 | 1727 | * spin_lock_irqsave(ata_scsi_rbuf_lock) on success |
1da177e4 LT |
1728 | * |
1729 | * RETURNS: | |
87340e98 | 1730 | * Pointer to response buffer. |
1da177e4 | 1731 | */ |
87340e98 TH |
1732 | static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, |
1733 | unsigned long *flags) | |
1da177e4 | 1734 | { |
87340e98 | 1735 | spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); |
1da177e4 | 1736 | |
87340e98 TH |
1737 | memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); |
1738 | if (copy_in) | |
1739 | sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1740 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1741 | return ata_scsi_rbuf; | |
1da177e4 LT |
1742 | } |
1743 | ||
1744 | /** | |
1745 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1746 | * @cmd: SCSI command containing buffer to be unmapped. | |
87340e98 TH |
1747 | * @copy_out: copy out result |
1748 | * @flags: @flags passed to ata_scsi_rbuf_get() | |
1da177e4 | 1749 | * |
87340e98 TH |
1750 | * Returns rbuf buffer. The result is copied to @cmd's buffer if |
1751 | * @copy_back is true. | |
1da177e4 LT |
1752 | * |
1753 | * LOCKING: | |
87340e98 | 1754 | * Unlocks ata_scsi_rbuf_lock. |
1da177e4 | 1755 | */ |
87340e98 TH |
1756 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, |
1757 | unsigned long *flags) | |
1da177e4 | 1758 | { |
87340e98 TH |
1759 | if (copy_out) |
1760 | sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), | |
1761 | ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); | |
1762 | spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); | |
1da177e4 LT |
1763 | } |
1764 | ||
1765 | /** | |
1766 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1767 | * @args: device IDENTIFY data / SCSI command of interest. | |
1768 | * @actor: Callback hook for desired SCSI command simulator | |
1769 | * | |
1770 | * Takes care of the hard work of simulating a SCSI command... | |
1771 | * Mapping the response buffer, calling the command's handler, | |
1772 | * and handling the handler's return value. This return value | |
1773 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1774 | * completed successfully (0), or not (in which case cmd->result |
1775 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1776 | * |
1777 | * LOCKING: | |
cca3974e | 1778 | * spin_lock_irqsave(host lock) |
1da177e4 | 1779 | */ |
f0761be3 | 1780 | static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, |
87340e98 | 1781 | unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) |
1da177e4 LT |
1782 | { |
1783 | u8 *rbuf; | |
87340e98 | 1784 | unsigned int rc; |
1da177e4 | 1785 | struct scsi_cmnd *cmd = args->cmd; |
b445c568 JG |
1786 | unsigned long flags; |
1787 | ||
87340e98 TH |
1788 | rbuf = ata_scsi_rbuf_get(cmd, false, &flags); |
1789 | rc = actor(args, rbuf); | |
1790 | ata_scsi_rbuf_put(cmd, rc == 0, &flags); | |
b445c568 | 1791 | |
ae006510 | 1792 | if (rc == 0) |
1da177e4 | 1793 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1794 | args->done(cmd); |
1da177e4 LT |
1795 | } |
1796 | ||
1797 | /** | |
1798 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1799 | * @args: device IDENTIFY data / SCSI command of interest. | |
1800 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1801 | * |
1802 | * Returns standard device identification data associated | |
b142eb65 | 1803 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1804 | * |
1805 | * LOCKING: | |
cca3974e | 1806 | * spin_lock_irqsave(host lock) |
1da177e4 | 1807 | */ |
87340e98 | 1808 | static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 1809 | { |
87340e98 TH |
1810 | const u8 versions[] = { |
1811 | 0x60, /* SAM-3 (no version claimed) */ | |
1812 | ||
1813 | 0x03, | |
1814 | 0x20, /* SBC-2 (no version claimed) */ | |
1815 | ||
1816 | 0x02, | |
1817 | 0x60 /* SPC-3 (no version claimed) */ | |
1818 | }; | |
1da177e4 LT |
1819 | u8 hdr[] = { |
1820 | TYPE_DISK, | |
1821 | 0, | |
1822 | 0x5, /* claim SPC-3 version compatibility */ | |
1823 | 2, | |
1824 | 95 - 4 | |
1825 | }; | |
1826 | ||
87340e98 TH |
1827 | VPRINTK("ENTER\n"); |
1828 | ||
1da177e4 LT |
1829 | /* set scsi removeable (RMB) bit per ata bit */ |
1830 | if (ata_id_removeable(args->id)) | |
1831 | hdr[1] |= (1 << 7); | |
1832 | ||
1da177e4 | 1833 | memcpy(rbuf, hdr, sizeof(hdr)); |
87340e98 TH |
1834 | memcpy(&rbuf[8], "ATA ", 8); |
1835 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); | |
1836 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 | 1837 | |
87340e98 TH |
1838 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1839 | memcpy(&rbuf[32], "n/a ", 4); | |
1da177e4 | 1840 | |
87340e98 | 1841 | memcpy(rbuf + 59, versions, sizeof(versions)); |
1da177e4 LT |
1842 | |
1843 | return 0; | |
1844 | } | |
1845 | ||
1846 | /** | |
b142eb65 | 1847 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1848 | * @args: device IDENTIFY data / SCSI command of interest. |
1849 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 1850 | * |
b142eb65 | 1851 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1852 | * |
1853 | * LOCKING: | |
cca3974e | 1854 | * spin_lock_irqsave(host lock) |
1da177e4 | 1855 | */ |
87340e98 | 1856 | static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
1857 | { |
1858 | const u8 pages[] = { | |
1859 | 0x00, /* page 0x00, this page */ | |
1860 | 0x80, /* page 0x80, unit serial no page */ | |
1e9dbc92 MW |
1861 | 0x83, /* page 0x83, device ident page */ |
1862 | 0x89, /* page 0x89, ata info page */ | |
1863 | 0xb1, /* page 0xb1, block device characteristics page */ | |
1da177e4 | 1864 | }; |
1da177e4 | 1865 | |
87340e98 TH |
1866 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1867 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1da177e4 LT |
1868 | return 0; |
1869 | } | |
1870 | ||
1871 | /** | |
b142eb65 | 1872 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1873 | * @args: device IDENTIFY data / SCSI command of interest. |
1874 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
1875 | * |
1876 | * Returns ATA device serial number. | |
1877 | * | |
1878 | * LOCKING: | |
cca3974e | 1879 | * spin_lock_irqsave(host lock) |
1da177e4 | 1880 | */ |
87340e98 | 1881 | static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
1882 | { |
1883 | const u8 hdr[] = { | |
1884 | 0, | |
1885 | 0x80, /* this page code */ | |
1886 | 0, | |
a0cf733b | 1887 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 | 1888 | }; |
1da177e4 | 1889 | |
87340e98 TH |
1890 | memcpy(rbuf, hdr, sizeof(hdr)); |
1891 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
1892 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1da177e4 LT |
1893 | return 0; |
1894 | } | |
1895 | ||
1da177e4 | 1896 | /** |
b142eb65 | 1897 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1898 | * @args: device IDENTIFY data / SCSI command of interest. |
1899 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 1900 | * |
b142eb65 JG |
1901 | * Yields two logical unit device identification designators: |
1902 | * - vendor specific ASCII containing the ATA serial number | |
1903 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1904 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1905 | * |
1906 | * LOCKING: | |
cca3974e | 1907 | * spin_lock_irqsave(host lock) |
1da177e4 | 1908 | */ |
87340e98 | 1909 | static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 1910 | { |
b142eb65 | 1911 | const int sat_model_serial_desc_len = 68; |
87340e98 | 1912 | int num; |
1da177e4 | 1913 | |
b142eb65 JG |
1914 | rbuf[1] = 0x83; /* this page code */ |
1915 | num = 4; | |
1916 | ||
87340e98 TH |
1917 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
1918 | rbuf[num + 0] = 2; | |
1919 | rbuf[num + 3] = ATA_ID_SERNO_LEN; | |
1920 | num += 4; | |
1921 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1922 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1923 | num += ATA_ID_SERNO_LEN; | |
1924 | ||
1925 | /* SAT defined lu model and serial numbers descriptor */ | |
1926 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
1927 | rbuf[num + 0] = 2; | |
1928 | rbuf[num + 1] = 1; | |
1929 | rbuf[num + 3] = sat_model_serial_desc_len; | |
1930 | num += 4; | |
1931 | memcpy(rbuf + num, "ATA ", 8); | |
1932 | num += 8; | |
1933 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, | |
1934 | ATA_ID_PROD_LEN); | |
1935 | num += ATA_ID_PROD_LEN; | |
1936 | ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, | |
1937 | ATA_ID_SERNO_LEN); | |
1938 | num += ATA_ID_SERNO_LEN; | |
1939 | ||
b142eb65 | 1940 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ |
1da177e4 LT |
1941 | return 0; |
1942 | } | |
1943 | ||
ad355b46 JG |
1944 | /** |
1945 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
1946 | * @args: device IDENTIFY data / SCSI command of interest. | |
1947 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
ad355b46 JG |
1948 | * |
1949 | * Yields SAT-specified ATA VPD page. | |
1950 | * | |
1951 | * LOCKING: | |
1952 | * spin_lock_irqsave(host lock) | |
1953 | */ | |
87340e98 | 1954 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) |
ad355b46 | 1955 | { |
ad355b46 | 1956 | struct ata_taskfile tf; |
ad355b46 | 1957 | |
ad355b46 JG |
1958 | memset(&tf, 0, sizeof(tf)); |
1959 | ||
87340e98 TH |
1960 | rbuf[1] = 0x89; /* our page code */ |
1961 | rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
1962 | rbuf[3] = (0x238 & 0xff); | |
ad355b46 | 1963 | |
87340e98 TH |
1964 | memcpy(&rbuf[8], "linux ", 8); |
1965 | memcpy(&rbuf[16], "libata ", 16); | |
1966 | memcpy(&rbuf[32], DRV_VERSION, 4); | |
1967 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
ad355b46 JG |
1968 | |
1969 | /* we don't store the ATA device signature, so we fake it */ | |
1970 | ||
1971 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
1972 | tf.lbal = 0x1; | |
1973 | tf.nsect = 0x1; | |
1974 | ||
87340e98 TH |
1975 | ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ |
1976 | rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
ad355b46 | 1977 | |
87340e98 | 1978 | rbuf[56] = ATA_CMD_ID_ATA; |
ad355b46 | 1979 | |
87340e98 | 1980 | memcpy(&rbuf[60], &args->id[0], 512); |
ad355b46 JG |
1981 | return 0; |
1982 | } | |
1983 | ||
1e9dbc92 MW |
1984 | static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) |
1985 | { | |
1986 | rbuf[1] = 0xb1; | |
1987 | rbuf[3] = 0x3c; | |
1988 | if (ata_id_major_version(args->id) > 7) { | |
1989 | rbuf[4] = args->id[217] >> 8; | |
1990 | rbuf[5] = args->id[217]; | |
1991 | rbuf[7] = args->id[168] & 0xf; | |
1992 | } | |
1993 | ||
1994 | return 0; | |
1995 | } | |
1996 | ||
1da177e4 | 1997 | /** |
0cba632b | 1998 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1999 | * @args: device IDENTIFY data / SCSI command of interest. |
2000 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2001 | * |
2002 | * No operation. Simply returns success to caller, to indicate | |
2003 | * that the caller should successfully complete this SCSI command. | |
2004 | * | |
2005 | * LOCKING: | |
cca3974e | 2006 | * spin_lock_irqsave(host lock) |
1da177e4 | 2007 | */ |
87340e98 | 2008 | static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2009 | { |
2010 | VPRINTK("ENTER\n"); | |
2011 | return 0; | |
2012 | } | |
2013 | ||
1da177e4 LT |
2014 | /** |
2015 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2016 | * @id: device IDENTIFY data | |
87340e98 | 2017 | * @buf: output buffer |
1da177e4 LT |
2018 | * |
2019 | * Generate a caching info page, which conditionally indicates | |
2020 | * write caching to the SCSI layer, depending on device | |
2021 | * capabilities. | |
2022 | * | |
2023 | * LOCKING: | |
2024 | * None. | |
2025 | */ | |
87340e98 | 2026 | static unsigned int ata_msense_caching(u16 *id, u8 *buf) |
1da177e4 | 2027 | { |
87340e98 | 2028 | memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); |
1da177e4 | 2029 | if (ata_id_wcache_enabled(id)) |
87340e98 | 2030 | buf[2] |= (1 << 2); /* write cache enable */ |
1da177e4 | 2031 | if (!ata_id_rahead_enabled(id)) |
87340e98 TH |
2032 | buf[12] |= (1 << 5); /* disable read ahead */ |
2033 | return sizeof(def_cache_mpage); | |
1da177e4 LT |
2034 | } |
2035 | ||
2036 | /** | |
2037 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
87340e98 | 2038 | * @buf: output buffer |
1da177e4 LT |
2039 | * |
2040 | * Generate a generic MODE SENSE control mode page. | |
2041 | * | |
2042 | * LOCKING: | |
2043 | * None. | |
2044 | */ | |
87340e98 | 2045 | static unsigned int ata_msense_ctl_mode(u8 *buf) |
1da177e4 | 2046 | { |
87340e98 | 2047 | memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); |
00ac37f5 | 2048 | return sizeof(def_control_mpage); |
1da177e4 LT |
2049 | } |
2050 | ||
2051 | /** | |
2052 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
ec2a20e6 | 2053 | * @buf: output buffer |
1da177e4 LT |
2054 | * |
2055 | * Generate a generic MODE SENSE r/w error recovery page. | |
2056 | * | |
2057 | * LOCKING: | |
2058 | * None. | |
2059 | */ | |
87340e98 | 2060 | static unsigned int ata_msense_rw_recovery(u8 *buf) |
1da177e4 | 2061 | { |
87340e98 | 2062 | memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); |
00ac37f5 | 2063 | return sizeof(def_rw_recovery_mpage); |
1da177e4 LT |
2064 | } |
2065 | ||
48bdc8ec JA |
2066 | /* |
2067 | * We can turn this into a real blacklist if it's needed, for now just | |
2068 | * blacklist any Maxtor BANC1G10 revision firmware | |
2069 | */ | |
2070 | static int ata_dev_supports_fua(u16 *id) | |
2071 | { | |
a0cf733b | 2072 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2073 | |
c3c013a2 JG |
2074 | if (!libata_fua) |
2075 | return 0; | |
48bdc8ec JA |
2076 | if (!ata_id_has_fua(id)) |
2077 | return 0; | |
2078 | ||
a0cf733b TH |
2079 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2080 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2081 | |
2e02671d | 2082 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2083 | return 1; |
2e02671d | 2084 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2085 | return 1; |
2086 | ||
2087 | return 0; /* blacklisted */ | |
2088 | } | |
2089 | ||
1da177e4 LT |
2090 | /** |
2091 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2092 | * @args: device IDENTIFY data / SCSI command of interest. | |
2093 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 | 2094 | * |
00ac37f5 DG |
2095 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2096 | * access devices (e.g. disks) only. There should be no block | |
2097 | * descriptor for other device types. | |
1da177e4 LT |
2098 | * |
2099 | * LOCKING: | |
cca3974e | 2100 | * spin_lock_irqsave(host lock) |
1da177e4 | 2101 | */ |
87340e98 | 2102 | static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2103 | { |
9a3dccc4 | 2104 | struct ata_device *dev = args->dev; |
87340e98 | 2105 | u8 *scsicmd = args->cmd->cmnd, *p = rbuf; |
00ac37f5 DG |
2106 | const u8 sat_blk_desc[] = { |
2107 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2108 | 0, | |
2109 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2110 | }; | |
2111 | u8 pg, spg; | |
87340e98 | 2112 | unsigned int ebd, page_control, six_byte; |
9a3dccc4 | 2113 | u8 dpofua; |
1da177e4 LT |
2114 | |
2115 | VPRINTK("ENTER\n"); | |
2116 | ||
2117 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2118 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2119 | /* | |
2120 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2121 | */ |
00ac37f5 | 2122 | |
1da177e4 | 2123 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2124 | switch (page_control) { |
2125 | case 0: /* current */ | |
2126 | break; /* supported */ | |
2127 | case 3: /* saved */ | |
2128 | goto saving_not_supp; | |
2129 | case 1: /* changeable */ | |
2130 | case 2: /* defaults */ | |
2131 | default: | |
2132 | goto invalid_fld; | |
2133 | } | |
1da177e4 | 2134 | |
87340e98 TH |
2135 | if (six_byte) |
2136 | p += 4 + (ebd ? 8 : 0); | |
2137 | else | |
2138 | p += 8 + (ebd ? 8 : 0); | |
1da177e4 | 2139 | |
00ac37f5 DG |
2140 | pg = scsicmd[2] & 0x3f; |
2141 | spg = scsicmd[3]; | |
2142 | /* | |
2143 | * No mode subpages supported (yet) but asking for _all_ | |
2144 | * subpages may be valid | |
2145 | */ | |
2146 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2147 | goto invalid_fld; | |
2148 | ||
2149 | switch(pg) { | |
2150 | case RW_RECOVERY_MPAGE: | |
87340e98 | 2151 | p += ata_msense_rw_recovery(p); |
1da177e4 LT |
2152 | break; |
2153 | ||
00ac37f5 | 2154 | case CACHE_MPAGE: |
87340e98 | 2155 | p += ata_msense_caching(args->id, p); |
1da177e4 LT |
2156 | break; |
2157 | ||
87340e98 TH |
2158 | case CONTROL_MPAGE: |
2159 | p += ata_msense_ctl_mode(p); | |
1da177e4 | 2160 | break; |
1da177e4 | 2161 | |
00ac37f5 | 2162 | case ALL_MPAGES: |
87340e98 TH |
2163 | p += ata_msense_rw_recovery(p); |
2164 | p += ata_msense_caching(args->id, p); | |
2165 | p += ata_msense_ctl_mode(p); | |
1da177e4 LT |
2166 | break; |
2167 | ||
2168 | default: /* invalid page code */ | |
ae006510 | 2169 | goto invalid_fld; |
1da177e4 LT |
2170 | } |
2171 | ||
9a3dccc4 | 2172 | dpofua = 0; |
f79d409f | 2173 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2174 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2175 | dpofua = 1 << 4; | |
2176 | ||
1da177e4 | 2177 | if (six_byte) { |
87340e98 TH |
2178 | rbuf[0] = p - rbuf - 1; |
2179 | rbuf[2] |= dpofua; | |
00ac37f5 | 2180 | if (ebd) { |
87340e98 TH |
2181 | rbuf[3] = sizeof(sat_blk_desc); |
2182 | memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2183 | } |
1da177e4 | 2184 | } else { |
87340e98 TH |
2185 | unsigned int output_len = p - rbuf - 2; |
2186 | ||
1da177e4 | 2187 | rbuf[0] = output_len >> 8; |
87340e98 TH |
2188 | rbuf[1] = output_len; |
2189 | rbuf[3] |= dpofua; | |
00ac37f5 | 2190 | if (ebd) { |
87340e98 TH |
2191 | rbuf[7] = sizeof(sat_blk_desc); |
2192 | memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); | |
00ac37f5 | 2193 | } |
1da177e4 | 2194 | } |
1da177e4 | 2195 | return 0; |
ae006510 DG |
2196 | |
2197 | invalid_fld: | |
2198 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2199 | /* "Invalid field in cbd" */ | |
2200 | return 1; | |
2201 | ||
2202 | saving_not_supp: | |
2203 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2204 | /* "Saving parameters not supported" */ | |
2205 | return 1; | |
1da177e4 LT |
2206 | } |
2207 | ||
2208 | /** | |
2209 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2210 | * @args: device IDENTIFY data / SCSI command of interest. | |
2211 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2212 | * |
2213 | * Simulate READ CAPACITY commands. | |
2214 | * | |
2215 | * LOCKING: | |
6a36261e | 2216 | * None. |
1da177e4 | 2217 | */ |
87340e98 | 2218 | static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 | 2219 | { |
6a36261e | 2220 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2221 | |
2222 | VPRINTK("ENTER\n"); | |
2223 | ||
1da177e4 | 2224 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2225 | if (last_lba >= 0xffffffffULL) |
2226 | last_lba = 0xffffffff; | |
0c144d0d | 2227 | |
1da177e4 | 2228 | /* sector count, 32-bit */ |
87340e98 TH |
2229 | rbuf[0] = last_lba >> (8 * 3); |
2230 | rbuf[1] = last_lba >> (8 * 2); | |
2231 | rbuf[2] = last_lba >> (8 * 1); | |
2232 | rbuf[3] = last_lba; | |
1da177e4 LT |
2233 | |
2234 | /* sector size */ | |
87340e98 TH |
2235 | rbuf[6] = ATA_SECT_SIZE >> 8; |
2236 | rbuf[7] = ATA_SECT_SIZE & 0xff; | |
1da177e4 LT |
2237 | } else { |
2238 | /* sector count, 64-bit */ | |
87340e98 TH |
2239 | rbuf[0] = last_lba >> (8 * 7); |
2240 | rbuf[1] = last_lba >> (8 * 6); | |
2241 | rbuf[2] = last_lba >> (8 * 5); | |
2242 | rbuf[3] = last_lba >> (8 * 4); | |
2243 | rbuf[4] = last_lba >> (8 * 3); | |
2244 | rbuf[5] = last_lba >> (8 * 2); | |
2245 | rbuf[6] = last_lba >> (8 * 1); | |
2246 | rbuf[7] = last_lba; | |
1da177e4 LT |
2247 | |
2248 | /* sector size */ | |
87340e98 TH |
2249 | rbuf[10] = ATA_SECT_SIZE >> 8; |
2250 | rbuf[11] = ATA_SECT_SIZE & 0xff; | |
1da177e4 LT |
2251 | } |
2252 | ||
2253 | return 0; | |
2254 | } | |
2255 | ||
2256 | /** | |
2257 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2258 | * @args: device IDENTIFY data / SCSI command of interest. | |
2259 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1da177e4 LT |
2260 | * |
2261 | * Simulate REPORT LUNS command. | |
2262 | * | |
2263 | * LOCKING: | |
cca3974e | 2264 | * spin_lock_irqsave(host lock) |
1da177e4 | 2265 | */ |
87340e98 | 2266 | static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) |
1da177e4 LT |
2267 | { |
2268 | VPRINTK("ENTER\n"); | |
2269 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2270 | ||
2271 | return 0; | |
2272 | } | |
2273 | ||
77853bf2 | 2274 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2275 | { |
74e6c8c3 | 2276 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2277 | /* FIXME: not quite right; we don't want the |
2278 | * translation of taskfile registers into | |
2279 | * a sense descriptors, since that's only | |
2280 | * correct for ATA, not ATAPI | |
2281 | */ | |
750426aa | 2282 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2283 | } |
a939c963 | 2284 | |
c6e6e666 | 2285 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2286 | ata_qc_free(qc); |
c6e6e666 | 2287 | } |
a939c963 | 2288 | |
c6e6e666 JG |
2289 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2290 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2291 | { | |
2292 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2293 | } | |
2294 | ||
2295 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2296 | { | |
2297 | struct ata_port *ap = qc->ap; | |
2298 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2299 | ||
2300 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2301 | |
2302 | /* FIXME: is this needed? */ | |
7ccd720d | 2303 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2304 | |
127102ae | 2305 | #ifdef CONFIG_ATA_SFF |
855d854a JB |
2306 | if (ap->ops->sff_tf_read) |
2307 | ap->ops->sff_tf_read(ap, &qc->tf); | |
127102ae | 2308 | #endif |
c6e6e666 JG |
2309 | |
2310 | /* fill these in, for the case where they are -not- overwritten */ | |
2311 | cmd->sense_buffer[0] = 0x70; | |
2312 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2313 | ||
2314 | ata_qc_reinit(qc); | |
2315 | ||
93f8fecb | 2316 | /* setup sg table and init transfer direction */ |
cadb7345 | 2317 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2318 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2319 | qc->dma_dir = DMA_FROM_DEVICE; |
2320 | ||
6e7846e9 | 2321 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2322 | qc->cdb[0] = REQUEST_SENSE; |
2323 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2324 | ||
2325 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2326 | qc->tf.command = ATA_CMD_PACKET; | |
2327 | ||
c6e6e666 | 2328 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2329 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2330 | qc->tf.feature |= ATAPI_PKT_DMA; |
2331 | } else { | |
0dc36888 | 2332 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2333 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2334 | qc->tf.lbah = 0; | |
c6e6e666 | 2335 | } |
a939c963 JG |
2336 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2337 | ||
c6e6e666 | 2338 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2339 | |
8e0e694a | 2340 | ata_qc_issue(qc); |
a939c963 JG |
2341 | |
2342 | DPRINTK("EXIT\n"); | |
2343 | } | |
2344 | ||
77853bf2 | 2345 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2346 | { |
2347 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2348 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2349 | |
a7dac447 | 2350 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2351 | |
246619da TH |
2352 | /* handle completion from new EH */ |
2353 | if (unlikely(qc->ap->ops->error_handler && | |
2354 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2355 | ||
2356 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2357 | /* FIXME: not quite right; we don't want the | |
2358 | * translation of taskfile registers into a | |
2359 | * sense descriptors, since that's only | |
2360 | * correct for ATA, not ATAPI | |
2361 | */ | |
750426aa | 2362 | ata_gen_passthru_sense(qc); |
246619da TH |
2363 | } |
2364 | ||
22aac089 TH |
2365 | /* SCSI EH automatically locks door if sdev->locked is |
2366 | * set. Sometimes door lock request continues to | |
2367 | * fail, for example, when no media is present. This | |
2368 | * creates a loop - SCSI EH issues door lock which | |
2369 | * fails and gets invoked again to acquire sense data | |
2370 | * for the failed command. | |
2371 | * | |
2372 | * If door lock fails, always clear sdev->locked to | |
2373 | * avoid this infinite loop. | |
2374 | */ | |
2375 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2376 | qc->dev->sdev->locked = 0; | |
2377 | ||
246619da TH |
2378 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2379 | qc->scsidone(cmd); | |
2380 | ata_qc_free(qc); | |
2381 | return; | |
2382 | } | |
2383 | ||
2384 | /* successful completion or old EH failure path */ | |
a7dac447 | 2385 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2386 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2387 | atapi_request_sense(qc); |
77853bf2 | 2388 | return; |
74e6c8c3 | 2389 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2390 | /* FIXME: not quite right; we don't want the |
2391 | * translation of taskfile registers into | |
2392 | * a sense descriptors, since that's only | |
2393 | * correct for ATA, not ATAPI | |
2394 | */ | |
750426aa | 2395 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2396 | } else { |
1da177e4 LT |
2397 | u8 *scsicmd = cmd->cmnd; |
2398 | ||
fd71da46 | 2399 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
b445c568 | 2400 | unsigned long flags; |
87340e98 | 2401 | u8 *buf; |
b445c568 | 2402 | |
87340e98 | 2403 | buf = ata_scsi_rbuf_get(cmd, true, &flags); |
a15dbeb4 JG |
2404 | |
2405 | /* ATAPI devices typically report zero for their SCSI version, | |
2406 | * and sometimes deviate from the spec WRT response data | |
2407 | * format. If SCSI version is reported as zero like normal, | |
2408 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2409 | * to indicate to the Linux scsi midlayer this is a modern | |
2410 | * device. 2) Ensure response data format / ATAPI information | |
2411 | * are always correct. | |
a15dbeb4 JG |
2412 | */ |
2413 | if (buf[2] == 0) { | |
2414 | buf[2] = 0x5; | |
2415 | buf[3] = 0x32; | |
2416 | } | |
2417 | ||
87340e98 | 2418 | ata_scsi_rbuf_put(cmd, true, &flags); |
1da177e4 | 2419 | } |
a15dbeb4 | 2420 | |
1da177e4 LT |
2421 | cmd->result = SAM_STAT_GOOD; |
2422 | } | |
2423 | ||
2424 | qc->scsidone(cmd); | |
77853bf2 | 2425 | ata_qc_free(qc); |
1da177e4 LT |
2426 | } |
2427 | /** | |
2428 | * atapi_xlat - Initialize PACKET taskfile | |
2429 | * @qc: command structure to be initialized | |
1da177e4 LT |
2430 | * |
2431 | * LOCKING: | |
cca3974e | 2432 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2433 | * |
2434 | * RETURNS: | |
2435 | * Zero on success, non-zero on failure. | |
2436 | */ | |
ad706991 | 2437 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2438 | { |
542b1444 | 2439 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 2440 | struct ata_device *dev = qc->dev; |
542b1444 | 2441 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
5895ef9a | 2442 | int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); |
2db78dd3 | 2443 | unsigned int nbytes; |
1da177e4 | 2444 | |
2e5704f6 TH |
2445 | memset(qc->cdb, 0, dev->cdb_len); |
2446 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2447 | |
2448 | qc->complete_fn = atapi_qc_complete; | |
2449 | ||
2450 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2451 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2452 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2453 | DPRINTK("direction: write\n"); | |
2454 | } | |
2455 | ||
2456 | qc->tf.command = ATA_CMD_PACKET; | |
aacda375 | 2457 | ata_qc_set_pc_nbytes(qc); |
e00f1ff3 TH |
2458 | |
2459 | /* check whether ATAPI DMA is safe */ | |
5895ef9a | 2460 | if (!nodata && !using_pio && atapi_check_dma(qc)) |
e00f1ff3 | 2461 | using_pio = 1; |
1da177e4 | 2462 | |
e190222d TH |
2463 | /* Some controller variants snoop this value for Packet |
2464 | * transfers to do state machine and FIFO management. Thus we | |
2465 | * want to set it properly, and for DMA where it is | |
2466 | * effectively meaningless. | |
2467 | */ | |
aacda375 | 2468 | nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); |
2db78dd3 | 2469 | |
e190222d TH |
2470 | /* Most ATAPI devices which honor transfer chunk size don't |
2471 | * behave according to the spec when odd chunk size which | |
2472 | * matches the transfer length is specified. If the number of | |
2473 | * bytes to transfer is 2n+1. According to the spec, what | |
2474 | * should happen is to indicate that 2n+1 is going to be | |
2475 | * transferred and transfer 2n+2 bytes where the last byte is | |
2476 | * padding. | |
2477 | * | |
2478 | * In practice, this doesn't happen. ATAPI devices first | |
2479 | * indicate and transfer 2n bytes and then indicate and | |
2480 | * transfer 2 bytes where the last byte is padding. | |
2481 | * | |
2482 | * This inconsistency confuses several controllers which | |
2483 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2484 | * These controllers use actual number of transferred bytes to | |
2485 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2486 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2487 | * FISes are aligned to 4 bytes. This causes data corruption | |
2488 | * and buffer overrun. | |
2489 | * | |
2490 | * Always setting nbytes to even number solves this problem | |
2491 | * because then ATAPI devices don't have to split data at 2n | |
2492 | * boundaries. | |
2493 | */ | |
2494 | if (nbytes & 0x1) | |
2495 | nbytes++; | |
2496 | ||
2db78dd3 AC |
2497 | qc->tf.lbam = (nbytes & 0xFF); |
2498 | qc->tf.lbah = (nbytes >> 8); | |
2499 | ||
5895ef9a TH |
2500 | if (nodata) |
2501 | qc->tf.protocol = ATAPI_PROT_NODATA; | |
2502 | else if (using_pio) | |
2503 | qc->tf.protocol = ATAPI_PROT_PIO; | |
2504 | else { | |
e00f1ff3 | 2505 | /* DMA data xfer */ |
0dc36888 | 2506 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2507 | qc->tf.feature |= ATAPI_PKT_DMA; |
2508 | ||
91163006 TH |
2509 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2510 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2511 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2512 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2513 | } |
2514 | ||
2db78dd3 AC |
2515 | |
2516 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2517 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2518 | return 0; |
2519 | } | |
2520 | ||
2dcb407e | 2521 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2522 | { |
071f44b1 | 2523 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2524 | if (likely(devno < ata_link_max_devices(&ap->link))) |
2525 | return &ap->link.device[devno]; | |
2526 | } else { | |
2527 | if (likely(devno < ap->nr_pmp_links)) | |
2528 | return &ap->pmp_link[devno].device[0]; | |
2529 | } | |
2530 | ||
ab5b3a5b TH |
2531 | return NULL; |
2532 | } | |
2533 | ||
2dcb407e JG |
2534 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2535 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2536 | { |
41bda9c9 TH |
2537 | int devno; |
2538 | ||
ab5b3a5b | 2539 | /* skip commands not addressed to targets we simulate */ |
071f44b1 | 2540 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2541 | if (unlikely(scsidev->channel || scsidev->lun)) |
2542 | return NULL; | |
2543 | devno = scsidev->id; | |
2544 | } else { | |
2545 | if (unlikely(scsidev->id || scsidev->lun)) | |
2546 | return NULL; | |
2547 | devno = scsidev->channel; | |
2548 | } | |
ab5b3a5b | 2549 | |
41bda9c9 | 2550 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2551 | } |
2552 | ||
99ba9e09 BK |
2553 | /** |
2554 | * ata_scsi_dev_enabled - determine if device is enabled | |
2555 | * @dev: ATA device | |
2556 | * | |
2557 | * Determine if commands should be sent to the specified device. | |
2558 | * | |
2559 | * LOCKING: | |
cca3974e | 2560 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2561 | * |
2562 | * RETURNS: | |
2563 | * 0 if commands are not allowed / 1 if commands are allowed | |
2564 | */ | |
2565 | ||
2566 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2567 | { | |
2568 | if (unlikely(!ata_dev_enabled(dev))) | |
2569 | return 0; | |
2570 | ||
9af5c9c9 | 2571 | if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) { |
99ba9e09 BK |
2572 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { |
2573 | ata_dev_printk(dev, KERN_WARNING, | |
2574 | "WARNING: ATAPI is %s, device ignored.\n", | |
2575 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2576 | return 0; | |
2577 | } | |
2578 | } | |
2579 | ||
2580 | return 1; | |
2581 | } | |
2582 | ||
1da177e4 LT |
2583 | /** |
2584 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2585 | * @ap: ATA port to which the device is attached | |
2586 | * @scsidev: SCSI device from which we derive the ATA device | |
2587 | * | |
2588 | * Given various information provided in struct scsi_cmnd, | |
2589 | * map that onto an ATA bus, and using that mapping | |
2590 | * determine which ata_device is associated with the | |
2591 | * SCSI command to be sent. | |
2592 | * | |
2593 | * LOCKING: | |
cca3974e | 2594 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2595 | * |
2596 | * RETURNS: | |
2597 | * Associated ATA device, or %NULL if not found. | |
2598 | */ | |
1da177e4 | 2599 | static struct ata_device * |
057ace5e | 2600 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2601 | { |
ab5b3a5b | 2602 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2603 | |
99ba9e09 | 2604 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2605 | return NULL; |
2606 | ||
1da177e4 LT |
2607 | return dev; |
2608 | } | |
2609 | ||
b095518e JG |
2610 | /* |
2611 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2612 | * @byte1: Byte 1 from pass-thru CDB. | |
2613 | * | |
2614 | * RETURNS: | |
2615 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2616 | */ | |
2617 | static u8 | |
2618 | ata_scsi_map_proto(u8 byte1) | |
2619 | { | |
2620 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2621 | case 3: /* Non-data */ |
2622 | return ATA_PROT_NODATA; | |
2623 | ||
2624 | case 6: /* DMA */ | |
2625 | case 10: /* UDMA Data-in */ | |
2626 | case 11: /* UDMA Data-Out */ | |
2627 | return ATA_PROT_DMA; | |
2628 | ||
2629 | case 4: /* PIO Data-in */ | |
2630 | case 5: /* PIO Data-out */ | |
2631 | return ATA_PROT_PIO; | |
2632 | ||
2633 | case 0: /* Hard Reset */ | |
2634 | case 1: /* SRST */ | |
2635 | case 8: /* Device Diagnostic */ | |
2636 | case 9: /* Device Reset */ | |
2637 | case 7: /* DMA Queued */ | |
2638 | case 12: /* FPDMA */ | |
2639 | case 15: /* Return Response Info */ | |
2640 | default: /* Reserved */ | |
2641 | break; | |
b095518e JG |
2642 | } |
2643 | ||
2644 | return ATA_PROT_UNKNOWN; | |
2645 | } | |
2646 | ||
2647 | /** | |
2648 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2649 | * @qc: command structure to be initialized | |
b095518e JG |
2650 | * |
2651 | * Handles either 12 or 16-byte versions of the CDB. | |
2652 | * | |
2653 | * RETURNS: | |
2654 | * Zero on success, non-zero on failure. | |
2655 | */ | |
ad706991 | 2656 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2657 | { |
2658 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2659 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2660 | struct ata_device *dev = qc->dev; |
ad706991 | 2661 | const u8 *cdb = scmd->cmnd; |
b095518e | 2662 | |
542b1444 | 2663 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2664 | goto invalid_fld; |
8190bdb9 | 2665 | |
ae8d4ee7 AC |
2666 | /* |
2667 | * Filter TPM commands by default. These provide an | |
2668 | * essentially uncontrolled encrypted "back door" between | |
2669 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2670 | * have a real reason for wanting to use them. This ensures | |
2671 | * that installed software cannot easily mess stuff up without | |
2672 | * user intent. DVR type users will probably ship with this enabled | |
2673 | * for movie content management. | |
2674 | * | |
2675 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock | |
2676 | * for this and should do in future but that it is not sufficient as | |
2677 | * DCS is an optional feature set. Thus we also do the software filter | |
2678 | * so that we comply with the TC consortium stated goal that the user | |
2679 | * can turn off TC features of their system. | |
2680 | */ | |
2681 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) | |
2682 | goto invalid_fld; | |
2683 | ||
f79d409f AC |
2684 | /* We may not issue DMA commands if no DMA mode is set */ |
2685 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2686 | goto invalid_fld; | |
b095518e JG |
2687 | |
2688 | /* | |
2689 | * 12 and 16 byte CDBs use different offsets to | |
2690 | * provide the various register values. | |
2691 | */ | |
542b1444 | 2692 | if (cdb[0] == ATA_16) { |
b095518e JG |
2693 | /* |
2694 | * 16-byte CDB - may contain extended commands. | |
2695 | * | |
2696 | * If that is the case, copy the upper byte register values. | |
2697 | */ | |
542b1444 TH |
2698 | if (cdb[1] & 0x01) { |
2699 | tf->hob_feature = cdb[3]; | |
2700 | tf->hob_nsect = cdb[5]; | |
2701 | tf->hob_lbal = cdb[7]; | |
2702 | tf->hob_lbam = cdb[9]; | |
2703 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2704 | tf->flags |= ATA_TFLAG_LBA48; |
2705 | } else | |
2706 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2707 | ||
2708 | /* | |
2709 | * Always copy low byte, device and command registers. | |
2710 | */ | |
542b1444 TH |
2711 | tf->feature = cdb[4]; |
2712 | tf->nsect = cdb[6]; | |
2713 | tf->lbal = cdb[8]; | |
2714 | tf->lbam = cdb[10]; | |
2715 | tf->lbah = cdb[12]; | |
2716 | tf->device = cdb[13]; | |
2717 | tf->command = cdb[14]; | |
b095518e JG |
2718 | } else { |
2719 | /* | |
2720 | * 12-byte CDB - incapable of extended commands. | |
2721 | */ | |
2722 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2723 | ||
542b1444 TH |
2724 | tf->feature = cdb[3]; |
2725 | tf->nsect = cdb[4]; | |
2726 | tf->lbal = cdb[5]; | |
2727 | tf->lbam = cdb[6]; | |
2728 | tf->lbah = cdb[7]; | |
2729 | tf->device = cdb[8]; | |
2730 | tf->command = cdb[9]; | |
b095518e | 2731 | } |
fa4453c4 AL |
2732 | |
2733 | /* enforce correct master/slave bit */ | |
2734 | tf->device = dev->devno ? | |
2735 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2736 | |
1dce589c AL |
2737 | /* sanity check for pio multi commands */ |
2738 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2739 | goto invalid_fld; | |
2740 | ||
2741 | if (is_multi_taskfile(tf)) { | |
2742 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2743 | ||
2744 | /* compare the passed through multi_count | |
2745 | * with the cached multi_count of libata | |
2746 | */ | |
2747 | if (multi_count != dev->multi_count) | |
2748 | ata_dev_printk(dev, KERN_WARNING, | |
2749 | "invalid multi_count %u ignored\n", | |
2750 | multi_count); | |
d26fc955 | 2751 | } |
1dce589c | 2752 | |
5a5dbd18 ML |
2753 | /* READ/WRITE LONG use a non-standard sect_size */ |
2754 | qc->sect_size = ATA_SECT_SIZE; | |
2755 | switch (tf->command) { | |
2756 | case ATA_CMD_READ_LONG: | |
2757 | case ATA_CMD_READ_LONG_ONCE: | |
2758 | case ATA_CMD_WRITE_LONG: | |
2759 | case ATA_CMD_WRITE_LONG_ONCE: | |
2760 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2761 | goto invalid_fld; | |
7120165c | 2762 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2763 | } |
2764 | ||
b095518e JG |
2765 | /* |
2766 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2767 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2768 | * by an update to hardware-specific registers for each | |
2769 | * controller (i.e. the reason for ->set_piomode(), | |
2770 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2771 | */ | |
2772 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2773 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2774 | goto invalid_fld; |
b095518e JG |
2775 | |
2776 | /* | |
2777 | * Set flags so that all registers will be written, | |
2778 | * and pass on write indication (used for PIO/DMA | |
2779 | * setup.) | |
2780 | */ | |
2781 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2782 | ||
542b1444 | 2783 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2784 | tf->flags |= ATA_TFLAG_WRITE; |
2785 | ||
2786 | /* | |
2787 | * Set transfer length. | |
2788 | * | |
2789 | * TODO: find out if we need to do more here to | |
2790 | * cover scatter/gather case. | |
2791 | */ | |
aacda375 | 2792 | ata_qc_set_pc_nbytes(qc); |
b095518e | 2793 | |
e027bd36 TH |
2794 | /* request result TF and be quiet about device error */ |
2795 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
e61e0672 | 2796 | |
b095518e | 2797 | return 0; |
9a405257 TH |
2798 | |
2799 | invalid_fld: | |
542b1444 | 2800 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2801 | /* "Invalid field in cdb" */ |
2802 | return 1; | |
b095518e JG |
2803 | } |
2804 | ||
1da177e4 LT |
2805 | /** |
2806 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2807 | * @dev: ATA device | |
2808 | * @cmd: SCSI command opcode to consider | |
2809 | * | |
2810 | * Look up the SCSI command given, and determine whether the | |
2811 | * SCSI command is to be translated or simulated. | |
2812 | * | |
2813 | * RETURNS: | |
2814 | * Pointer to translation function if possible, %NULL if not. | |
2815 | */ | |
2816 | ||
2817 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2818 | { | |
2819 | switch (cmd) { | |
2820 | case READ_6: | |
2821 | case READ_10: | |
2822 | case READ_16: | |
2823 | ||
2824 | case WRITE_6: | |
2825 | case WRITE_10: | |
2826 | case WRITE_16: | |
2827 | return ata_scsi_rw_xlat; | |
2828 | ||
2829 | case SYNCHRONIZE_CACHE: | |
2830 | if (ata_try_flush_cache(dev)) | |
2831 | return ata_scsi_flush_xlat; | |
2832 | break; | |
2833 | ||
2834 | case VERIFY: | |
2835 | case VERIFY_16: | |
2836 | return ata_scsi_verify_xlat; | |
b095518e JG |
2837 | |
2838 | case ATA_12: | |
2839 | case ATA_16: | |
2840 | return ata_scsi_pass_thru; | |
da61396d | 2841 | |
972dcafb DG |
2842 | case START_STOP: |
2843 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2844 | } |
2845 | ||
2846 | return NULL; | |
2847 | } | |
2848 | ||
2849 | /** | |
2850 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2851 | * @ap: ATA port to which the command was being sent | |
2852 | * @cmd: SCSI command to dump | |
2853 | * | |
2854 | * Prints the contents of a SCSI command via printk(). | |
2855 | */ | |
2856 | ||
2857 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2858 | struct scsi_cmnd *cmd) | |
2859 | { | |
2860 | #ifdef ATA_DEBUG | |
2861 | struct scsi_device *scsidev = cmd->device; | |
2862 | u8 *scsicmd = cmd->cmnd; | |
2863 | ||
2864 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 2865 | ap->print_id, |
1da177e4 LT |
2866 | scsidev->channel, scsidev->id, scsidev->lun, |
2867 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2868 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2869 | scsicmd[8]); | |
2870 | #endif | |
2871 | } | |
2872 | ||
542b1444 | 2873 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2874 | void (*done)(struct scsi_cmnd *), |
2875 | struct ata_device *dev) | |
eb3f0f9c | 2876 | { |
baf4fdfa ML |
2877 | u8 scsi_op = scmd->cmnd[0]; |
2878 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
2879 | int rc = 0; |
2880 | ||
eb3f0f9c | 2881 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
2882 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
2883 | goto bad_cdb_len; | |
eb3f0f9c | 2884 | |
baf4fdfa ML |
2885 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
2886 | } else { | |
2887 | if (unlikely(!scmd->cmd_len)) | |
2888 | goto bad_cdb_len; | |
2889 | ||
2890 | xlat_func = NULL; | |
2891 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
2892 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
2893 | int len = COMMAND_SIZE(scsi_op); |
2894 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
2895 | goto bad_cdb_len; |
2896 | ||
2897 | xlat_func = atapi_xlat; | |
2898 | } else { | |
2899 | /* ATA_16 passthru, treat as an ATA command */ | |
2900 | if (unlikely(scmd->cmd_len > 16)) | |
2901 | goto bad_cdb_len; | |
2902 | ||
2903 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
2904 | } | |
2905 | } | |
2906 | ||
2907 | if (xlat_func) | |
2908 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
2909 | else | |
2910 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
2911 | |
2912 | return rc; | |
baf4fdfa ML |
2913 | |
2914 | bad_cdb_len: | |
2915 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
2916 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
2917 | scmd->result = DID_ERROR << 16; | |
2918 | done(scmd); | |
2919 | return 0; | |
eb3f0f9c BK |
2920 | } |
2921 | ||
1da177e4 LT |
2922 | /** |
2923 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2924 | * @cmd: SCSI command to be sent | |
2925 | * @done: Completion function, called when command is complete | |
2926 | * | |
2927 | * In some cases, this function translates SCSI commands into | |
2928 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2929 | * hardware. In other cases, this function simulates a | |
2930 | * SCSI device by evaluating and responding to certain | |
2931 | * SCSI commands. This creates the overall effect of | |
2932 | * ATA and ATAPI devices appearing as SCSI devices. | |
2933 | * | |
2934 | * LOCKING: | |
cca3974e | 2935 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
2936 | * |
2937 | * RETURNS: | |
2115ea94 TH |
2938 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
2939 | * 0 otherwise. | |
1da177e4 | 2940 | */ |
1da177e4 LT |
2941 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
2942 | { | |
2943 | struct ata_port *ap; | |
2944 | struct ata_device *dev; | |
2945 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 2946 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 2947 | int rc = 0; |
1da177e4 | 2948 | |
35bb94b1 | 2949 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
2950 | |
2951 | spin_unlock(shost->host_lock); | |
ba6a1308 | 2952 | spin_lock(ap->lock); |
1da177e4 LT |
2953 | |
2954 | ata_scsi_dump_cdb(ap, cmd); | |
2955 | ||
2956 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 2957 | if (likely(dev)) |
2115ea94 | 2958 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 2959 | else { |
1da177e4 LT |
2960 | cmd->result = (DID_BAD_TARGET << 16); |
2961 | done(cmd); | |
1da177e4 LT |
2962 | } |
2963 | ||
ba6a1308 | 2964 | spin_unlock(ap->lock); |
005a5a06 | 2965 | spin_lock(shost->host_lock); |
2115ea94 | 2966 | return rc; |
1da177e4 LT |
2967 | } |
2968 | ||
2969 | /** | |
2970 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 2971 | * @dev: the target device |
1da177e4 LT |
2972 | * @cmd: SCSI command being sent to device. |
2973 | * @done: SCSI command completion function. | |
2974 | * | |
2975 | * Interprets and directly executes a select list of SCSI commands | |
2976 | * that can be handled internally. | |
2977 | * | |
2978 | * LOCKING: | |
cca3974e | 2979 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2980 | */ |
2981 | ||
3373efd8 | 2982 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
2983 | void (*done)(struct scsi_cmnd *)) |
2984 | { | |
2985 | struct ata_scsi_args args; | |
057ace5e | 2986 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 2987 | u8 tmp8; |
1da177e4 | 2988 | |
9a3dccc4 TH |
2989 | args.dev = dev; |
2990 | args.id = dev->id; | |
1da177e4 LT |
2991 | args.cmd = cmd; |
2992 | args.done = done; | |
2993 | ||
2994 | switch(scsicmd[0]) { | |
2dcb407e JG |
2995 | /* TODO: worth improving? */ |
2996 | case FORMAT_UNIT: | |
2997 | ata_scsi_invalid_field(cmd, done); | |
2998 | break; | |
2999 | ||
3000 | case INQUIRY: | |
3001 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 3002 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
3003 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3004 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3005 | else switch (scsicmd[2]) { | |
3006 | case 0x00: | |
3007 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3008 | break; |
2dcb407e JG |
3009 | case 0x80: |
3010 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3011 | break; |
2dcb407e JG |
3012 | case 0x83: |
3013 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3014 | break; |
2dcb407e JG |
3015 | case 0x89: |
3016 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3017 | break; | |
1e9dbc92 MW |
3018 | case 0xb1: |
3019 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); | |
3020 | break; | |
2dcb407e | 3021 | default: |
ae006510 | 3022 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 3023 | break; |
2dcb407e JG |
3024 | } |
3025 | break; | |
3026 | ||
3027 | case MODE_SENSE: | |
3028 | case MODE_SENSE_10: | |
3029 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3030 | break; | |
3031 | ||
3032 | case MODE_SELECT: /* unconditionally return */ | |
3033 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3034 | ata_scsi_invalid_field(cmd, done); | |
3035 | break; | |
1da177e4 | 3036 | |
2dcb407e JG |
3037 | case READ_CAPACITY: |
3038 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3039 | break; | |
3040 | ||
3041 | case SERVICE_ACTION_IN: | |
3042 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3043 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3044 | else |
3045 | ata_scsi_invalid_field(cmd, done); | |
3046 | break; | |
1da177e4 | 3047 | |
2dcb407e JG |
3048 | case REPORT_LUNS: |
3049 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3050 | break; | |
1da177e4 | 3051 | |
2dcb407e JG |
3052 | case REQUEST_SENSE: |
3053 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3054 | cmd->result = (DRIVER_SENSE << 24); | |
3055 | done(cmd); | |
3056 | break; | |
1da177e4 | 3057 | |
2dcb407e JG |
3058 | /* if we reach this, then writeback caching is disabled, |
3059 | * turning this into a no-op. | |
3060 | */ | |
3061 | case SYNCHRONIZE_CACHE: | |
3062 | /* fall through */ | |
3063 | ||
3064 | /* no-op's, complete with success */ | |
3065 | case REZERO_UNIT: | |
3066 | case SEEK_6: | |
3067 | case SEEK_10: | |
3068 | case TEST_UNIT_READY: | |
3069 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3070 | break; | |
45394145 | 3071 | |
2dcb407e JG |
3072 | case SEND_DIAGNOSTIC: |
3073 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3074 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3075 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3076 | else |
3077 | ata_scsi_invalid_field(cmd, done); | |
3078 | break; | |
1da177e4 | 3079 | |
2dcb407e JG |
3080 | /* all other commands */ |
3081 | default: | |
3082 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3083 | /* "Invalid command operation code" */ | |
3084 | done(cmd); | |
3085 | break; | |
1da177e4 LT |
3086 | } |
3087 | } | |
3088 | ||
f3187195 TH |
3089 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3090 | { | |
3091 | int i, rc; | |
3092 | ||
3093 | for (i = 0; i < host->n_ports; i++) { | |
3094 | struct ata_port *ap = host->ports[i]; | |
3095 | struct Scsi_Host *shost; | |
3096 | ||
3097 | rc = -ENOMEM; | |
3098 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3099 | if (!shost) | |
3100 | goto err_alloc; | |
3101 | ||
3102 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3103 | ap->scsi_host = shost; | |
3104 | ||
3105 | shost->transportt = &ata_scsi_transport_template; | |
3106 | shost->unique_id = ap->print_id; | |
3107 | shost->max_id = 16; | |
3108 | shost->max_lun = 1; | |
3109 | shost->max_channel = 1; | |
3110 | shost->max_cmd_len = 16; | |
3111 | ||
31cc23b3 TH |
3112 | /* Schedule policy is determined by ->qc_defer() |
3113 | * callback and it needs to see every deferred qc. | |
3114 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3115 | * automatically deferring requests. | |
3116 | */ | |
3117 | shost->max_host_blocked = 1; | |
3118 | ||
f3187195 TH |
3119 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3120 | if (rc) | |
3121 | goto err_add; | |
3122 | } | |
3123 | ||
3124 | return 0; | |
3125 | ||
3126 | err_add: | |
3127 | scsi_host_put(host->ports[i]->scsi_host); | |
3128 | err_alloc: | |
3129 | while (--i >= 0) { | |
3130 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3131 | ||
3132 | scsi_remove_host(shost); | |
3133 | scsi_host_put(shost); | |
3134 | } | |
3135 | return rc; | |
3136 | } | |
3137 | ||
1ae46317 | 3138 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3139 | { |
1ae46317 TH |
3140 | int tries = 5; |
3141 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3142 | struct ata_link *link; |
1ae46317 | 3143 | struct ata_device *dev; |
644dd0cc | 3144 | |
198e0fed | 3145 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3146 | return; |
3147 | ||
1ae46317 | 3148 | repeat: |
41bda9c9 TH |
3149 | ata_port_for_each_link(link, ap) { |
3150 | ata_link_for_each_dev(dev, link) { | |
3151 | struct scsi_device *sdev; | |
3152 | int channel = 0, id = 0; | |
3edebac4 | 3153 | |
41bda9c9 TH |
3154 | if (!ata_dev_enabled(dev) || dev->sdev) |
3155 | continue; | |
3f19ee8c | 3156 | |
41bda9c9 TH |
3157 | if (ata_is_host_link(link)) |
3158 | id = dev->devno; | |
3159 | else | |
3160 | channel = link->pmp; | |
3161 | ||
3162 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3163 | NULL); | |
3164 | if (!IS_ERR(sdev)) { | |
3165 | dev->sdev = sdev; | |
3166 | scsi_device_put(sdev); | |
3167 | } | |
3edebac4 | 3168 | } |
3f19ee8c | 3169 | } |
1ae46317 TH |
3170 | |
3171 | /* If we scanned while EH was in progress or allocation | |
3172 | * failure occurred, scan would have failed silently. Check | |
3173 | * whether all devices are attached. | |
3174 | */ | |
41bda9c9 TH |
3175 | ata_port_for_each_link(link, ap) { |
3176 | ata_link_for_each_dev(dev, link) { | |
3177 | if (ata_dev_enabled(dev) && !dev->sdev) | |
3178 | goto exit_loop; | |
3179 | } | |
1ae46317 | 3180 | } |
41bda9c9 TH |
3181 | exit_loop: |
3182 | if (!link) | |
1ae46317 TH |
3183 | return; |
3184 | ||
3185 | /* we're missing some SCSI devices */ | |
3186 | if (sync) { | |
3187 | /* If caller requested synchrnous scan && we've made | |
3188 | * any progress, sleep briefly and repeat. | |
3189 | */ | |
3190 | if (dev != last_failed_dev) { | |
3191 | msleep(100); | |
3192 | last_failed_dev = dev; | |
3193 | goto repeat; | |
3194 | } | |
3195 | ||
3196 | /* We might be failing to detect boot device, give it | |
3197 | * a few more chances. | |
3198 | */ | |
3199 | if (--tries) { | |
3200 | msleep(100); | |
3201 | goto repeat; | |
3202 | } | |
3203 | ||
3204 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3205 | "failed without making any progress,\n" | |
3206 | " switching to async\n"); | |
3207 | } | |
3208 | ||
3209 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3210 | round_jiffies_relative(HZ)); | |
644dd0cc | 3211 | } |
0ea035a3 TH |
3212 | |
3213 | /** | |
3214 | * ata_scsi_offline_dev - offline attached SCSI device | |
3215 | * @dev: ATA device to offline attached SCSI device for | |
3216 | * | |
3217 | * This function is called from ata_eh_hotplug() and responsible | |
3218 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3219 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3220 | * against clearing. |
3221 | * | |
3222 | * LOCKING: | |
cca3974e | 3223 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3224 | * |
3225 | * RETURNS: | |
3226 | * 1 if attached SCSI device exists, 0 otherwise. | |
3227 | */ | |
3228 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3229 | { | |
3230 | if (dev->sdev) { | |
3231 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3232 | return 1; | |
3233 | } | |
3234 | return 0; | |
3235 | } | |
580b2102 TH |
3236 | |
3237 | /** | |
3238 | * ata_scsi_remove_dev - remove attached SCSI device | |
3239 | * @dev: ATA device to remove attached SCSI device for | |
3240 | * | |
3241 | * This function is called from ata_eh_scsi_hotplug() and | |
3242 | * responsible for removing the SCSI device attached to @dev. | |
3243 | * | |
3244 | * LOCKING: | |
3245 | * Kernel thread context (may sleep). | |
3246 | */ | |
3247 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3248 | { | |
9af5c9c9 | 3249 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3250 | struct scsi_device *sdev; |
3251 | unsigned long flags; | |
3252 | ||
3253 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3254 | * state doesn't change underneath us and thus | |
3255 | * scsi_device_get() always succeeds. The mutex locking can | |
3256 | * be removed if there is __scsi_device_get() interface which | |
3257 | * increments reference counts regardless of device state. | |
3258 | */ | |
cca3974e | 3259 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3260 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3261 | |
cca3974e | 3262 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3263 | sdev = dev->sdev; |
3264 | dev->sdev = NULL; | |
3265 | ||
3266 | if (sdev) { | |
3267 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3268 | * away underneath us after the host lock and |
580b2102 TH |
3269 | * scan_mutex are released. Hold onto it. |
3270 | */ | |
3271 | if (scsi_device_get(sdev) == 0) { | |
3272 | /* The following ensures the attached sdev is | |
3273 | * offline on return from ata_scsi_offline_dev() | |
3274 | * regardless it wins or loses the race | |
3275 | * against this function. | |
3276 | */ | |
3277 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3278 | } else { | |
3279 | WARN_ON(1); | |
3280 | sdev = NULL; | |
3281 | } | |
3282 | } | |
3283 | ||
ba6a1308 | 3284 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3285 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3286 | |
3287 | if (sdev) { | |
3288 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3289 | sdev->sdev_gendev.bus_id); | |
3290 | ||
3291 | scsi_remove_device(sdev); | |
3292 | scsi_device_put(sdev); | |
3293 | } | |
3294 | } | |
3295 | ||
41bda9c9 TH |
3296 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3297 | { | |
3298 | struct ata_port *ap = link->ap; | |
3299 | struct ata_device *dev; | |
3300 | ||
3301 | ata_link_for_each_dev(dev, link) { | |
3302 | unsigned long flags; | |
3303 | ||
3304 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3305 | continue; | |
3306 | ||
3307 | spin_lock_irqsave(ap->lock, flags); | |
3308 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3309 | spin_unlock_irqrestore(ap->lock, flags); | |
3310 | ||
3311 | ata_scsi_remove_dev(dev); | |
3312 | } | |
3313 | } | |
3314 | ||
2f294968 KCA |
3315 | /** |
3316 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3317 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3318 | * |
3319 | * Tell the block layer to send a media change notification | |
3320 | * event. | |
3321 | * | |
3322 | * LOCKING: | |
854c73a2 | 3323 | * spin_lock_irqsave(host lock) |
2f294968 | 3324 | */ |
854c73a2 | 3325 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3326 | { |
854c73a2 | 3327 | if (dev->sdev) |
f26792d5 JG |
3328 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3329 | GFP_ATOMIC); | |
2f294968 | 3330 | } |
2f294968 | 3331 | |
580b2102 TH |
3332 | /** |
3333 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3334 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3335 | * |
3336 | * Perform SCSI part of hotplug. It's executed from a separate | |
3337 | * workqueue after EH completes. This is necessary because SCSI | |
3338 | * hot plugging requires working EH and hot unplugging is | |
3339 | * synchronized with hot plugging with a mutex. | |
3340 | * | |
3341 | * LOCKING: | |
3342 | * Kernel thread context (may sleep). | |
3343 | */ | |
65f27f38 | 3344 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3345 | { |
65f27f38 DH |
3346 | struct ata_port *ap = |
3347 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3348 | int i; |
580b2102 | 3349 | |
b51e9e5d | 3350 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3351 | DPRINTK("ENTER/EXIT - unloading\n"); |
3352 | return; | |
3353 | } | |
3354 | ||
3355 | DPRINTK("ENTER\n"); | |
3356 | ||
41bda9c9 TH |
3357 | /* Unplug detached devices. We cannot use link iterator here |
3358 | * because PMP links have to be scanned even if PMP is | |
3359 | * currently not attached. Iterate manually. | |
3360 | */ | |
3361 | ata_scsi_handle_link_detach(&ap->link); | |
3362 | if (ap->pmp_link) | |
3363 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3364 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3365 | |
3366 | /* scan for new ones */ | |
1ae46317 | 3367 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3368 | |
3369 | DPRINTK("EXIT\n"); | |
3370 | } | |
83c47bcb TH |
3371 | |
3372 | /** | |
3373 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3374 | * @shost: SCSI host to scan | |
3375 | * @channel: Channel to scan | |
3376 | * @id: ID to scan | |
3377 | * @lun: LUN to scan | |
3378 | * | |
3379 | * This function is called when user explicitly requests bus | |
3380 | * scan. Set probe pending flag and invoke EH. | |
3381 | * | |
3382 | * LOCKING: | |
3383 | * SCSI layer (we don't care) | |
3384 | * | |
3385 | * RETURNS: | |
3386 | * Zero. | |
3387 | */ | |
3388 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3389 | unsigned int id, unsigned int lun) | |
3390 | { | |
3391 | struct ata_port *ap = ata_shost_to_port(shost); | |
3392 | unsigned long flags; | |
41bda9c9 | 3393 | int devno, rc = 0; |
83c47bcb TH |
3394 | |
3395 | if (!ap->ops->error_handler) | |
3396 | return -EOPNOTSUPP; | |
3397 | ||
41bda9c9 | 3398 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3399 | return -EINVAL; |
3400 | ||
071f44b1 | 3401 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
3402 | if (channel != SCAN_WILD_CARD && channel) |
3403 | return -EINVAL; | |
3404 | devno = id; | |
3405 | } else { | |
3406 | if (id != SCAN_WILD_CARD && id) | |
3407 | return -EINVAL; | |
3408 | devno = channel; | |
3409 | } | |
3410 | ||
ba6a1308 | 3411 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3412 | |
41bda9c9 TH |
3413 | if (devno == SCAN_WILD_CARD) { |
3414 | struct ata_link *link; | |
3415 | ||
3416 | ata_port_for_each_link(link, ap) { | |
3417 | struct ata_eh_info *ehi = &link->eh_info; | |
b558eddd | 3418 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 3419 | ehi->action |= ATA_EH_RESET; |
41bda9c9 | 3420 | } |
83c47bcb | 3421 | } else { |
41bda9c9 | 3422 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3423 | |
3424 | if (dev) { | |
41bda9c9 | 3425 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 | 3426 | ehi->probe_mask |= 1 << dev->devno; |
cf480626 | 3427 | ehi->action |= ATA_EH_RESET; |
83c47bcb TH |
3428 | } else |
3429 | rc = -EINVAL; | |
3430 | } | |
3431 | ||
309afcb5 | 3432 | if (rc == 0) { |
83c47bcb | 3433 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3434 | spin_unlock_irqrestore(ap->lock, flags); |
3435 | ata_port_wait_eh(ap); | |
3436 | } else | |
3437 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3438 | |
3439 | return rc; | |
3440 | } | |
3057ac3c | 3441 | |
3442 | /** | |
d0171269 | 3443 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3444 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3445 | * |
d0171269 TH |
3446 | * After ATA pass thru (SAT) commands are executed successfully, |
3447 | * libata need to propagate the changes to SCSI layer. This | |
3448 | * function must be executed from ata_aux_wq such that sdev | |
3449 | * attach/detach don't race with rescan. | |
3057ac3c | 3450 | * |
d0171269 TH |
3451 | * LOCKING: |
3452 | * Kernel thread context (may sleep). | |
3057ac3c | 3453 | */ |
65f27f38 | 3454 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3455 | { |
65f27f38 DH |
3456 | struct ata_port *ap = |
3457 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3458 | struct ata_link *link; |
f58229f8 | 3459 | struct ata_device *dev; |
f84e7e41 | 3460 | unsigned long flags; |
3057ac3c | 3461 | |
f84e7e41 TH |
3462 | spin_lock_irqsave(ap->lock, flags); |
3463 | ||
41bda9c9 TH |
3464 | ata_port_for_each_link(link, ap) { |
3465 | ata_link_for_each_dev(dev, link) { | |
3466 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3467 | |
41bda9c9 TH |
3468 | if (!ata_dev_enabled(dev) || !sdev) |
3469 | continue; | |
3470 | if (scsi_device_get(sdev)) | |
3471 | continue; | |
f84e7e41 | 3472 | |
41bda9c9 TH |
3473 | spin_unlock_irqrestore(ap->lock, flags); |
3474 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3475 | scsi_device_put(sdev); | |
3476 | spin_lock_irqsave(ap->lock, flags); | |
3477 | } | |
3057ac3c | 3478 | } |
f84e7e41 TH |
3479 | |
3480 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3481 | } |
80289167 BK |
3482 | |
3483 | /** | |
3484 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3485 | * @host: ATA host container for all SAS ports |
80289167 | 3486 | * @port_info: Information from low-level host driver |
cca3974e | 3487 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3488 | * |
3489 | * LOCKING: | |
3490 | * PCI/etc. bus probe sem. | |
3491 | * | |
3492 | * RETURNS: | |
3493 | * ata_port pointer on success / NULL on failure. | |
3494 | */ | |
3495 | ||
cca3974e | 3496 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3497 | struct ata_port_info *port_info, |
cca3974e | 3498 | struct Scsi_Host *shost) |
80289167 | 3499 | { |
f3187195 | 3500 | struct ata_port *ap; |
80289167 | 3501 | |
f3187195 | 3502 | ap = ata_port_alloc(host); |
80289167 BK |
3503 | if (!ap) |
3504 | return NULL; | |
3505 | ||
f3187195 | 3506 | ap->port_no = 0; |
cca3974e | 3507 | ap->lock = shost->host_lock; |
f3187195 TH |
3508 | ap->pio_mask = port_info->pio_mask; |
3509 | ap->mwdma_mask = port_info->mwdma_mask; | |
3510 | ap->udma_mask = port_info->udma_mask; | |
3511 | ap->flags |= port_info->flags; | |
3512 | ap->ops = port_info->port_ops; | |
3513 | ap->cbl = ATA_CBL_SATA; | |
3514 | ||
80289167 BK |
3515 | return ap; |
3516 | } | |
3517 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3518 | ||
3519 | /** | |
3520 | * ata_sas_port_start - Set port up for dma. | |
3521 | * @ap: Port to initialize | |
3522 | * | |
3523 | * Called just after data structures for each port are | |
dde20207 | 3524 | * initialized. |
80289167 BK |
3525 | * |
3526 | * May be used as the port_start() entry in ata_port_operations. | |
3527 | * | |
3528 | * LOCKING: | |
3529 | * Inherited from caller. | |
3530 | */ | |
3531 | int ata_sas_port_start(struct ata_port *ap) | |
3532 | { | |
dde20207 | 3533 | return 0; |
80289167 BK |
3534 | } |
3535 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3536 | ||
3537 | /** | |
3538 | * ata_port_stop - Undo ata_sas_port_start() | |
3539 | * @ap: Port to shut down | |
3540 | * | |
80289167 BK |
3541 | * May be used as the port_stop() entry in ata_port_operations. |
3542 | * | |
3543 | * LOCKING: | |
3544 | * Inherited from caller. | |
3545 | */ | |
3546 | ||
3547 | void ata_sas_port_stop(struct ata_port *ap) | |
3548 | { | |
80289167 BK |
3549 | } |
3550 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3551 | ||
3552 | /** | |
3553 | * ata_sas_port_init - Initialize a SATA device | |
3554 | * @ap: SATA port to initialize | |
3555 | * | |
3556 | * LOCKING: | |
3557 | * PCI/etc. bus probe sem. | |
3558 | * | |
3559 | * RETURNS: | |
3560 | * Zero on success, non-zero on error. | |
3561 | */ | |
3562 | ||
3563 | int ata_sas_port_init(struct ata_port *ap) | |
3564 | { | |
3565 | int rc = ap->ops->port_start(ap); | |
3566 | ||
f3187195 TH |
3567 | if (!rc) { |
3568 | ap->print_id = ata_print_id++; | |
80289167 | 3569 | rc = ata_bus_probe(ap); |
f3187195 | 3570 | } |
80289167 BK |
3571 | |
3572 | return rc; | |
3573 | } | |
3574 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3575 | ||
3576 | /** | |
3577 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3578 | * @ap: SATA port to destroy | |
3579 | * | |
3580 | */ | |
3581 | ||
3582 | void ata_sas_port_destroy(struct ata_port *ap) | |
3583 | { | |
f0d36efd TH |
3584 | if (ap->ops->port_stop) |
3585 | ap->ops->port_stop(ap); | |
80289167 BK |
3586 | kfree(ap); |
3587 | } | |
3588 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3589 | ||
3590 | /** | |
3591 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3592 | * @sdev: SCSI device to configure | |
3593 | * @ap: ATA port to which SCSI device is attached | |
3594 | * | |
3595 | * RETURNS: | |
3596 | * Zero. | |
3597 | */ | |
3598 | ||
3599 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3600 | { | |
3601 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3602 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3603 | return 0; |
3604 | } | |
3605 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3606 | ||
3607 | /** | |
3608 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3609 | * @cmd: SCSI command to be sent | |
3610 | * @done: Completion function, called when command is complete | |
3611 | * @ap: ATA port to which the command is being sent | |
3612 | * | |
3613 | * RETURNS: | |
08475a19 BK |
3614 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3615 | * 0 otherwise. | |
80289167 BK |
3616 | */ |
3617 | ||
3618 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3619 | struct ata_port *ap) | |
3620 | { | |
08475a19 BK |
3621 | int rc = 0; |
3622 | ||
80289167 BK |
3623 | ata_scsi_dump_cdb(ap, cmd); |
3624 | ||
9af5c9c9 TH |
3625 | if (likely(ata_scsi_dev_enabled(ap->link.device))) |
3626 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); | |
80289167 BK |
3627 | else { |
3628 | cmd->result = (DID_BAD_TARGET << 16); | |
3629 | done(cmd); | |
3630 | } | |
08475a19 | 3631 | return rc; |
80289167 BK |
3632 | } |
3633 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |