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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 | ||
b095518e JG |
52 | #define SECTOR_SIZE 512 |
53 | ||
ad706991 | 54 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); |
ab5b3a5b | 55 | |
2dcb407e | 56 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 57 | const struct scsi_device *scsidev); |
2dcb407e | 58 | static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, |
ab5b3a5b | 59 | const struct scsi_device *scsidev); |
83c47bcb TH |
60 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
61 | unsigned int id, unsigned int lun); | |
ab5b3a5b | 62 | |
1da177e4 | 63 | |
00ac37f5 DG |
64 | #define RW_RECOVERY_MPAGE 0x1 |
65 | #define RW_RECOVERY_MPAGE_LEN 12 | |
66 | #define CACHE_MPAGE 0x8 | |
67 | #define CACHE_MPAGE_LEN 20 | |
68 | #define CONTROL_MPAGE 0xa | |
69 | #define CONTROL_MPAGE_LEN 12 | |
70 | #define ALL_MPAGES 0x3f | |
71 | #define ALL_SUB_MPAGES 0xff | |
72 | ||
73 | ||
24f75686 | 74 | static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { |
00ac37f5 DG |
75 | RW_RECOVERY_MPAGE, |
76 | RW_RECOVERY_MPAGE_LEN - 2, | |
24f75686 | 77 | (1 << 7), /* AWRE */ |
00ac37f5 DG |
78 | 0, /* read retry count */ |
79 | 0, 0, 0, 0, | |
80 | 0, /* write retry count */ | |
81 | 0, 0, 0 | |
82 | }; | |
83 | ||
84 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
85 | CACHE_MPAGE, | |
86 | CACHE_MPAGE_LEN - 2, | |
87 | 0, /* contains WCE, needs to be 0 for logic */ | |
88 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
89 | 0, /* contains DRA, needs to be 0 for logic */ | |
90 | 0, 0, 0, 0, 0, 0, 0 | |
91 | }; | |
92 | ||
93 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
94 | CONTROL_MPAGE, | |
95 | CONTROL_MPAGE_LEN - 2, | |
96 | 2, /* DSENSE=0, GLTSD=1 */ | |
97 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
98 | 0, 0, 0, 0, 0xff, 0xff, | |
99 | 0, 30 /* extended self test time, see 05-359r1 */ | |
100 | }; | |
101 | ||
30afc84c TH |
102 | /* |
103 | * libata transport template. libata doesn't do real transport stuff. | |
104 | * It just needs the eh_timed_out hook. | |
105 | */ | |
f3187195 | 106 | static struct scsi_transport_template ata_scsi_transport_template = { |
9227c33d | 107 | .eh_strategy_handler = ata_scsi_error, |
30afc84c | 108 | .eh_timed_out = ata_scsi_timed_out, |
ccf68c34 | 109 | .user_scan = ata_scsi_user_scan, |
30afc84c TH |
110 | }; |
111 | ||
1da177e4 | 112 | |
ca77329f KCA |
113 | static const struct { |
114 | enum link_pm value; | |
115 | const char *name; | |
116 | } link_pm_policy[] = { | |
117 | { NOT_AVAILABLE, "max_performance" }, | |
118 | { MIN_POWER, "min_power" }, | |
119 | { MAX_PERFORMANCE, "max_performance" }, | |
120 | { MEDIUM_POWER, "medium_power" }, | |
121 | }; | |
122 | ||
123 | const char *ata_scsi_lpm_get(enum link_pm policy) | |
124 | { | |
125 | int i; | |
126 | ||
127 | for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++) | |
128 | if (link_pm_policy[i].value == policy) | |
129 | return link_pm_policy[i].name; | |
130 | ||
131 | return NULL; | |
132 | } | |
133 | ||
134 | static ssize_t ata_scsi_lpm_put(struct class_device *class_dev, | |
135 | const char *buf, size_t count) | |
136 | { | |
137 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
138 | struct ata_port *ap = ata_shost_to_port(shost); | |
139 | enum link_pm policy = 0; | |
140 | int i; | |
141 | ||
142 | /* | |
143 | * we are skipping array location 0 on purpose - this | |
144 | * is because a value of NOT_AVAILABLE is displayed | |
145 | * to the user as max_performance, but when the user | |
146 | * writes "max_performance", they actually want the | |
147 | * value to match MAX_PERFORMANCE. | |
148 | */ | |
149 | for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) { | |
150 | const int len = strlen(link_pm_policy[i].name); | |
151 | if (strncmp(link_pm_policy[i].name, buf, len) == 0 && | |
152 | buf[len] == '\n') { | |
153 | policy = link_pm_policy[i].value; | |
154 | break; | |
155 | } | |
156 | } | |
157 | if (!policy) | |
158 | return -EINVAL; | |
159 | ||
160 | ata_lpm_schedule(ap, policy); | |
161 | return count; | |
162 | } | |
163 | ||
164 | static ssize_t | |
165 | ata_scsi_lpm_show(struct class_device *class_dev, char *buf) | |
166 | { | |
167 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
168 | struct ata_port *ap = ata_shost_to_port(shost); | |
169 | const char *policy = | |
170 | ata_scsi_lpm_get(ap->pm_policy); | |
171 | ||
172 | if (!policy) | |
173 | return -EINVAL; | |
174 | ||
175 | return snprintf(buf, 23, "%s\n", policy); | |
176 | } | |
177 | CLASS_DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, | |
178 | ata_scsi_lpm_show, ata_scsi_lpm_put); | |
179 | EXPORT_SYMBOL_GPL(class_device_attr_link_power_management_policy); | |
180 | ||
ae006510 DG |
181 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
182 | void (*done)(struct scsi_cmnd *)) | |
183 | { | |
184 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
185 | /* "Invalid field in cbd" */ | |
186 | done(cmd); | |
187 | } | |
188 | ||
1da177e4 LT |
189 | /** |
190 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
191 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
192 | * @bdev: block device associated with @sdev | |
193 | * @capacity: capacity of SCSI device | |
194 | * @geom: location to which geometry will be output | |
195 | * | |
196 | * Generic bios head/sector/cylinder calculator | |
197 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
198 | * mapping. Some situations may arise where the disk is not | |
199 | * bootable if this is not used. | |
200 | * | |
201 | * LOCKING: | |
202 | * Defined by the SCSI layer. We don't really care. | |
203 | * | |
204 | * RETURNS: | |
205 | * Zero. | |
206 | */ | |
207 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
208 | sector_t capacity, int geom[]) | |
209 | { | |
210 | geom[0] = 255; | |
211 | geom[1] = 63; | |
212 | sector_div(capacity, 255*63); | |
213 | geom[2] = capacity; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
5924b74c TH |
218 | /** |
219 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
220 | * @sdev: SCSI device to get identify data for | |
221 | * @arg: User buffer area for identify data | |
222 | * | |
223 | * LOCKING: | |
224 | * Defined by the SCSI layer. We don't really care. | |
225 | * | |
226 | * RETURNS: | |
227 | * Zero on success, negative errno on error. | |
228 | */ | |
229 | static int ata_get_identity(struct scsi_device *sdev, void __user *arg) | |
230 | { | |
231 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
232 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
233 | u16 __user *dst = arg; | |
234 | char buf[40]; | |
235 | ||
236 | if (!dev) | |
237 | return -ENOMSG; | |
238 | ||
239 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
240 | return -EFAULT; | |
241 | ||
242 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
243 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
244 | return -EFAULT; | |
245 | ||
246 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
247 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
248 | return -EFAULT; | |
249 | ||
250 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
251 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
252 | return -EFAULT; | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
b095518e JG |
257 | /** |
258 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 259 | * @scsidev: Device to which we are issuing command |
b095518e JG |
260 | * @arg: User provided data for issuing command |
261 | * | |
262 | * LOCKING: | |
263 | * Defined by the SCSI layer. We don't really care. | |
264 | * | |
265 | * RETURNS: | |
266 | * Zero on success, negative errno on error. | |
267 | */ | |
b095518e JG |
268 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
269 | { | |
270 | int rc = 0; | |
271 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 272 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 273 | int argsize = 0; |
85837ebd | 274 | enum dma_data_direction data_dir; |
bbe1fe7e | 275 | int cmd_result; |
b095518e | 276 | |
c893a3ae | 277 | if (arg == NULL) |
b095518e JG |
278 | return -EINVAL; |
279 | ||
280 | if (copy_from_user(args, arg, sizeof(args))) | |
281 | return -EFAULT; | |
282 | ||
bbe1fe7e ET |
283 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
284 | if (!sensebuf) | |
285 | return -ENOMEM; | |
286 | ||
b095518e JG |
287 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
288 | ||
289 | if (args[3]) { | |
290 | argsize = SECTOR_SIZE * args[3]; | |
291 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
292 | if (argbuf == NULL) { |
293 | rc = -ENOMEM; | |
294 | goto error; | |
295 | } | |
b095518e JG |
296 | |
297 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
298 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
2dcb407e | 299 | block count in sector count field */ |
85837ebd | 300 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
301 | } else { |
302 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 303 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 304 | data_dir = DMA_NONE; |
b095518e JG |
305 | } |
306 | ||
307 | scsi_cmd[0] = ATA_16; | |
308 | ||
309 | scsi_cmd[4] = args[2]; | |
310 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
311 | scsi_cmd[6] = args[3]; | |
312 | scsi_cmd[8] = args[1]; | |
313 | scsi_cmd[10] = 0x4f; | |
314 | scsi_cmd[12] = 0xc2; | |
315 | } else { | |
316 | scsi_cmd[6] = args[1]; | |
317 | } | |
318 | scsi_cmd[14] = args[0]; | |
319 | ||
320 | /* Good values for timeout and retries? Values below | |
321 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e | 322 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
2dcb407e | 323 | sensebuf, (10*HZ), 5, 0); |
bbe1fe7e ET |
324 | |
325 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
326 | u8 *desc = sensebuf + 8; | |
327 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
328 | ||
329 | /* If we set cc then ATA pass-through will cause a | |
330 | * check condition even if no error. Filter that. */ | |
331 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
332 | struct scsi_sense_hdr sshdr; | |
333 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
2dcb407e JG |
334 | &sshdr); |
335 | if (sshdr.sense_key == 0 && | |
336 | sshdr.asc == 0 && sshdr.ascq == 0) | |
bbe1fe7e ET |
337 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
338 | } | |
339 | ||
340 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
2dcb407e JG |
341 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ |
342 | desc[0] == 0x09) { /* code is "ATA Descriptor" */ | |
343 | args[0] = desc[13]; /* status */ | |
344 | args[1] = desc[3]; /* error */ | |
345 | args[2] = desc[5]; /* sector count (0:7) */ | |
bbe1fe7e ET |
346 | if (copy_to_user(arg, args, sizeof(args))) |
347 | rc = -EFAULT; | |
348 | } | |
349 | } | |
350 | ||
351 | ||
352 | if (cmd_result) { | |
b095518e JG |
353 | rc = -EIO; |
354 | goto error; | |
355 | } | |
356 | ||
b095518e | 357 | if ((argbuf) |
c893a3ae | 358 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
359 | rc = -EFAULT; |
360 | error: | |
bbe1fe7e | 361 | kfree(sensebuf); |
8f760780 | 362 | kfree(argbuf); |
b095518e JG |
363 | return rc; |
364 | } | |
365 | ||
366 | /** | |
367 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 368 | * @scsidev: Device to which we are issuing command |
b095518e JG |
369 | * @arg: User provided data for issuing command |
370 | * | |
371 | * LOCKING: | |
372 | * Defined by the SCSI layer. We don't really care. | |
373 | * | |
374 | * RETURNS: | |
375 | * Zero on success, negative errno on error. | |
376 | */ | |
377 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
378 | { | |
379 | int rc = 0; | |
380 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
381 | u8 args[7], *sensebuf = NULL; |
382 | int cmd_result; | |
b095518e | 383 | |
c893a3ae | 384 | if (arg == NULL) |
b095518e JG |
385 | return -EINVAL; |
386 | ||
387 | if (copy_from_user(args, arg, sizeof(args))) | |
388 | return -EFAULT; | |
389 | ||
af068bd1 DM |
390 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
391 | if (!sensebuf) | |
392 | return -ENOMEM; | |
393 | ||
b095518e JG |
394 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
395 | scsi_cmd[0] = ATA_16; | |
396 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 397 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
398 | scsi_cmd[4] = args[1]; |
399 | scsi_cmd[6] = args[2]; | |
400 | scsi_cmd[8] = args[3]; | |
401 | scsi_cmd[10] = args[4]; | |
402 | scsi_cmd[12] = args[5]; | |
277239f2 | 403 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
404 | scsi_cmd[14] = args[0]; |
405 | ||
b095518e | 406 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 407 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 DM |
408 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
409 | sensebuf, (10*HZ), 5, 0); | |
410 | ||
411 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
412 | u8 *desc = sensebuf + 8; | |
413 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
414 | ||
415 | /* If we set cc then ATA pass-through will cause a | |
416 | * check condition even if no error. Filter that. */ | |
417 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
418 | struct scsi_sense_hdr sshdr; | |
419 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
420 | &sshdr); | |
2dcb407e JG |
421 | if (sshdr.sense_key == 0 && |
422 | sshdr.asc == 0 && sshdr.ascq == 0) | |
af068bd1 DM |
423 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
424 | } | |
425 | ||
426 | /* Send userspace ATA registers */ | |
427 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
428 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
429 | args[0] = desc[13]; /* status */ | |
430 | args[1] = desc[3]; /* error */ | |
431 | args[2] = desc[5]; /* sector count (0:7) */ | |
432 | args[3] = desc[7]; /* lbal */ | |
433 | args[4] = desc[9]; /* lbam */ | |
434 | args[5] = desc[11]; /* lbah */ | |
435 | args[6] = desc[12]; /* select */ | |
436 | if (copy_to_user(arg, args, sizeof(args))) | |
437 | rc = -EFAULT; | |
438 | } | |
439 | } | |
440 | ||
441 | if (cmd_result) { | |
b095518e | 442 | rc = -EIO; |
af068bd1 DM |
443 | goto error; |
444 | } | |
b095518e | 445 | |
af068bd1 DM |
446 | error: |
447 | kfree(sensebuf); | |
b095518e JG |
448 | return rc; |
449 | } | |
450 | ||
1da177e4 LT |
451 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
452 | { | |
1da177e4 LT |
453 | int val = -EINVAL, rc = -EINVAL; |
454 | ||
1da177e4 LT |
455 | switch (cmd) { |
456 | case ATA_IOC_GET_IO32: | |
457 | val = 0; | |
458 | if (copy_to_user(arg, &val, 1)) | |
459 | return -EFAULT; | |
460 | return 0; | |
461 | ||
462 | case ATA_IOC_SET_IO32: | |
463 | val = (unsigned long) arg; | |
464 | if (val != 0) | |
465 | return -EINVAL; | |
466 | return 0; | |
467 | ||
5924b74c TH |
468 | case HDIO_GET_IDENTITY: |
469 | return ata_get_identity(scsidev, arg); | |
470 | ||
b095518e JG |
471 | case HDIO_DRIVE_CMD: |
472 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
473 | return -EACCES; | |
474 | return ata_cmd_ioctl(scsidev, arg); | |
475 | ||
476 | case HDIO_DRIVE_TASK: | |
477 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
478 | return -EACCES; | |
479 | return ata_task_ioctl(scsidev, arg); | |
480 | ||
1da177e4 LT |
481 | default: |
482 | rc = -ENOTTY; | |
483 | break; | |
484 | } | |
485 | ||
1da177e4 LT |
486 | return rc; |
487 | } | |
488 | ||
489 | /** | |
490 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
491 | * @dev: ATA device to which the new command is attached |
492 | * @cmd: SCSI command that originated this ATA command | |
493 | * @done: SCSI command completion function | |
494 | * | |
495 | * Obtain a reference to an unused ata_queued_cmd structure, | |
496 | * which is the basic libata structure representing a single | |
497 | * ATA command sent to the hardware. | |
498 | * | |
499 | * If a command was available, fill in the SCSI-specific | |
500 | * portions of the structure with information on the | |
501 | * current command. | |
502 | * | |
503 | * LOCKING: | |
cca3974e | 504 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
505 | * |
506 | * RETURNS: | |
507 | * Command allocated, or %NULL if none available. | |
508 | */ | |
7102d230 AB |
509 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
510 | struct scsi_cmnd *cmd, | |
511 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
512 | { |
513 | struct ata_queued_cmd *qc; | |
514 | ||
3373efd8 | 515 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
516 | if (qc) { |
517 | qc->scsicmd = cmd; | |
518 | qc->scsidone = done; | |
519 | ||
7120165c BH |
520 | qc->__sg = scsi_sglist(cmd); |
521 | qc->n_elem = scsi_sg_count(cmd); | |
1da177e4 LT |
522 | } else { |
523 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
524 | done(cmd); | |
525 | } | |
526 | ||
527 | return qc; | |
528 | } | |
529 | ||
b095518e JG |
530 | /** |
531 | * ata_dump_status - user friendly display of error info | |
532 | * @id: id of the port in question | |
533 | * @tf: ptr to filled out taskfile | |
534 | * | |
535 | * Decode and dump the ATA error/status registers for the user so | |
536 | * that they have some idea what really happened at the non | |
537 | * make-believe layer. | |
538 | * | |
539 | * LOCKING: | |
540 | * inherited from caller | |
541 | */ | |
7102d230 | 542 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
543 | { |
544 | u8 stat = tf->command, err = tf->feature; | |
545 | ||
546 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
547 | if (stat & ATA_BUSY) { | |
548 | printk("Busy }\n"); /* Data is not valid in this case */ | |
549 | } else { | |
550 | if (stat & 0x40) printk("DriveReady "); | |
551 | if (stat & 0x20) printk("DeviceFault "); | |
552 | if (stat & 0x10) printk("SeekComplete "); | |
553 | if (stat & 0x08) printk("DataRequest "); | |
554 | if (stat & 0x04) printk("CorrectedError "); | |
555 | if (stat & 0x02) printk("Index "); | |
556 | if (stat & 0x01) printk("Error "); | |
557 | printk("}\n"); | |
558 | ||
559 | if (err) { | |
560 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
561 | if (err & 0x04) printk("DriveStatusError "); | |
562 | if (err & 0x80) { | |
563 | if (err & 0x04) printk("BadCRC "); | |
564 | else printk("Sector "); | |
565 | } | |
566 | if (err & 0x40) printk("UncorrectableError "); | |
567 | if (err & 0x10) printk("SectorIdNotFound "); | |
568 | if (err & 0x02) printk("TrackZeroNotFound "); | |
569 | if (err & 0x01) printk("AddrMarkNotFound "); | |
570 | printk("}\n"); | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
1da177e4 LT |
575 | /** |
576 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 577 | * @id: ATA device number |
1da177e4 | 578 | * @drv_stat: value contained in ATA status register |
b095518e JG |
579 | * @drv_err: value contained in ATA error register |
580 | * @sk: the sense key we'll fill out | |
581 | * @asc: the additional sense code we'll fill out | |
582 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 583 | * @verbose: be verbose |
1da177e4 | 584 | * |
b095518e JG |
585 | * Converts an ATA error into a SCSI error. Fill out pointers to |
586 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
587 | * format sense blocks. | |
1da177e4 LT |
588 | * |
589 | * LOCKING: | |
cca3974e | 590 | * spin_lock_irqsave(host lock) |
1da177e4 | 591 | */ |
7102d230 AB |
592 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
593 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 594 | { |
b095518e | 595 | int i; |
ffe75ef6 | 596 | |
1da177e4 | 597 | /* Based on the 3ware driver translation table */ |
98ac62de | 598 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
599 | /* BBD|ECC|ID|MAR */ |
600 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
601 | /* BBD|ECC|ID */ | |
602 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
603 | /* ECC|MC|MARK */ | |
604 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
605 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
606 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
607 | /* MC|ID|ABRT|TRK0|MARK */ | |
608 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
609 | /* MCR|MARK */ | |
610 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
611 | /* Bad address mark */ | |
612 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
613 | /* TRK0 */ | |
614 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
615 | /* Abort & !ICRC */ | |
616 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
617 | /* Media change request */ | |
618 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
619 | /* SRV */ | |
620 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
621 | /* Media change */ | |
622 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
623 | /* ECC */ | |
624 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
625 | /* BBD - block marked bad */ | |
626 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
627 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
628 | }; | |
98ac62de | 629 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
630 | /* Must be first because BUSY means no other bits valid */ |
631 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
632 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
633 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
634 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
635 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
636 | }; | |
1da177e4 | 637 | |
1da177e4 LT |
638 | /* |
639 | * Is this an error we can process/parse | |
640 | */ | |
b095518e JG |
641 | if (drv_stat & ATA_BUSY) { |
642 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 643 | } |
b095518e JG |
644 | |
645 | if (drv_err) { | |
646 | /* Look for drv_err */ | |
647 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
648 | /* Look for best matches first */ | |
2e9edbf8 | 649 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
650 | sense_table[i][0]) { |
651 | *sk = sense_table[i][1]; | |
652 | *asc = sense_table[i][2]; | |
653 | *ascq = sense_table[i][3]; | |
654 | goto translate_done; | |
655 | } | |
656 | } | |
657 | /* No immediate match */ | |
246619da TH |
658 | if (verbose) |
659 | printk(KERN_WARNING "ata%u: no sense translation for " | |
660 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 661 | } |
b095518e JG |
662 | |
663 | /* Fall back to interpreting status bits */ | |
664 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
665 | if (stat_table[i][0] & drv_stat) { | |
666 | *sk = stat_table[i][1]; | |
667 | *asc = stat_table[i][2]; | |
668 | *ascq = stat_table[i][3]; | |
669 | goto translate_done; | |
1da177e4 | 670 | } |
b095518e JG |
671 | } |
672 | /* No error? Undecoded? */ | |
246619da TH |
673 | if (verbose) |
674 | printk(KERN_WARNING "ata%u: no sense translation for " | |
675 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 676 | |
2d202024 AC |
677 | /* We need a sensible error return here, which is tricky, and one |
678 | that won't cause people to do things like return a disk wrongly */ | |
679 | *sk = ABORTED_COMMAND; | |
680 | *asc = 0x00; | |
681 | *ascq = 0x00; | |
b095518e JG |
682 | |
683 | translate_done: | |
246619da TH |
684 | if (verbose) |
685 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
686 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
687 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
688 | return; |
689 | } | |
690 | ||
691 | /* | |
750426aa | 692 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
693 | * @qc: Command that completed. |
694 | * | |
695 | * This function is specific to the ATA descriptor format sense | |
696 | * block specified for the ATA pass through commands. Regardless | |
697 | * of whether the command errored or not, return a sense | |
698 | * block. Copy all controller registers into the sense | |
699 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
700 | * | |
701 | * LOCKING: | |
750426aa | 702 | * None. |
b095518e | 703 | */ |
750426aa | 704 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
705 | { |
706 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 707 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
708 | unsigned char *sb = cmd->sense_buffer; |
709 | unsigned char *desc = sb + 8; | |
246619da | 710 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
711 | |
712 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
713 | ||
0e5dec47 | 714 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 715 | |
b095518e JG |
716 | /* |
717 | * Use ata_to_sense_error() to map status register bits | |
718 | * onto sense key, asc & ascq. | |
719 | */ | |
058e55e1 TH |
720 | if (qc->err_mask || |
721 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 722 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 723 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 724 | sb[1] &= 0x0f; |
1da177e4 LT |
725 | } |
726 | ||
b095518e JG |
727 | /* |
728 | * Sense data is current and format is descriptor. | |
729 | */ | |
730 | sb[0] = 0x72; | |
1da177e4 | 731 | |
b095518e JG |
732 | desc[0] = 0x09; |
733 | ||
f38621b3 TH |
734 | /* set length of additional sense data */ |
735 | sb[7] = 14; | |
736 | desc[1] = 12; | |
b095518e JG |
737 | |
738 | /* | |
739 | * Copy registers into sense buffer. | |
740 | */ | |
741 | desc[2] = 0x00; | |
742 | desc[3] = tf->feature; /* == error reg */ | |
743 | desc[5] = tf->nsect; | |
744 | desc[7] = tf->lbal; | |
745 | desc[9] = tf->lbam; | |
746 | desc[11] = tf->lbah; | |
747 | desc[12] = tf->device; | |
748 | desc[13] = tf->command; /* == status reg */ | |
749 | ||
750 | /* | |
751 | * Fill in Extend bit, and the high order bytes | |
752 | * if applicable. | |
753 | */ | |
754 | if (tf->flags & ATA_TFLAG_LBA48) { | |
755 | desc[2] |= 0x01; | |
756 | desc[4] = tf->hob_nsect; | |
757 | desc[6] = tf->hob_lbal; | |
758 | desc[8] = tf->hob_lbam; | |
759 | desc[10] = tf->hob_lbah; | |
1da177e4 | 760 | } |
b095518e | 761 | } |
1da177e4 | 762 | |
b095518e | 763 | /** |
750426aa | 764 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
765 | * @qc: Command that we are erroring out |
766 | * | |
d25614ba TH |
767 | * Generate sense block for a failed ATA command @qc. Descriptor |
768 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
769 | * |
770 | * LOCKING: | |
750426aa | 771 | * None. |
b095518e | 772 | */ |
750426aa | 773 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 774 | { |
d25614ba | 775 | struct ata_device *dev = qc->dev; |
b095518e | 776 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 777 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 778 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 779 | unsigned char *desc = sb + 8; |
246619da | 780 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 781 | u64 block; |
b095518e JG |
782 | |
783 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
784 | ||
0e5dec47 | 785 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 786 | |
d25614ba TH |
787 | /* sense data is current and format is descriptor */ |
788 | sb[0] = 0x72; | |
789 | ||
790 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
791 | * onto sense key, asc & ascq. |
792 | */ | |
058e55e1 TH |
793 | if (qc->err_mask || |
794 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 795 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
796 | &sb[1], &sb[2], &sb[3], verbose); |
797 | sb[1] &= 0x0f; | |
1da177e4 | 798 | } |
1da177e4 | 799 | |
d25614ba | 800 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 801 | |
d25614ba TH |
802 | /* information sense data descriptor */ |
803 | sb[7] = 12; | |
804 | desc[0] = 0x00; | |
805 | desc[1] = 10; | |
a7dac447 | 806 | |
d25614ba TH |
807 | desc[2] |= 0x80; /* valid */ |
808 | desc[6] = block >> 40; | |
809 | desc[7] = block >> 32; | |
810 | desc[8] = block >> 24; | |
811 | desc[9] = block >> 16; | |
812 | desc[10] = block >> 8; | |
813 | desc[11] = block; | |
1da177e4 LT |
814 | } |
815 | ||
a6cce2a7 BK |
816 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
817 | { | |
818 | sdev->use_10_for_rw = 1; | |
819 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
820 | |
821 | /* Schedule policy is determined by ->qc_defer() callback and | |
822 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
823 | * prevent SCSI midlayer from automatically deferring | |
824 | * requests. | |
825 | */ | |
826 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
827 | } |
828 | ||
829 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
830 | struct ata_device *dev) | |
831 | { | |
914ed354 TH |
832 | /* configure max sectors */ |
833 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 834 | |
914ed354 | 835 | /* SATA DMA transfers must be multiples of 4 byte, so |
a6cce2a7 BK |
836 | * we need to pad ATAPI transfers using an extra sg. |
837 | * Decrement max hw segments accordingly. | |
838 | */ | |
839 | if (dev->class == ATA_DEV_ATAPI) { | |
165125e1 | 840 | struct request_queue *q = sdev->request_queue; |
a6cce2a7 BK |
841 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); |
842 | } | |
a6e6ce8e TH |
843 | |
844 | if (dev->flags & ATA_DFLAG_NCQ) { | |
845 | int depth; | |
846 | ||
847 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
848 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
849 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
850 | } | |
a6cce2a7 BK |
851 | } |
852 | ||
1da177e4 LT |
853 | /** |
854 | * ata_scsi_slave_config - Set SCSI device attributes | |
855 | * @sdev: SCSI device to examine | |
856 | * | |
857 | * This is called before we actually start reading | |
858 | * and writing to the device, to configure certain | |
859 | * SCSI mid-layer behaviors. | |
860 | * | |
861 | * LOCKING: | |
862 | * Defined by SCSI layer. We don't really care. | |
863 | */ | |
864 | ||
865 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
866 | { | |
31534363 TH |
867 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
868 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
869 | ||
a6cce2a7 | 870 | ata_scsi_sdev_config(sdev); |
1da177e4 | 871 | |
9666f400 TH |
872 | sdev->manage_start_stop = 1; |
873 | ||
31534363 | 874 | if (dev) |
a6cce2a7 | 875 | ata_scsi_dev_config(sdev, dev); |
1da177e4 LT |
876 | |
877 | return 0; /* scsi layer doesn't check return value, sigh */ | |
878 | } | |
879 | ||
83c47bcb TH |
880 | /** |
881 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
882 | * @sdev: SCSI device to be destroyed | |
883 | * | |
884 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
885 | * this unplugging was initiated by libata as indicated by NULL | |
886 | * dev->sdev, this function doesn't have to do anything. | |
887 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
888 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
889 | * EH. | |
890 | * | |
891 | * LOCKING: | |
892 | * Defined by SCSI layer. We don't really care. | |
893 | */ | |
894 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
895 | { | |
896 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
897 | unsigned long flags; | |
898 | struct ata_device *dev; | |
899 | ||
900 | if (!ap->ops->error_handler) | |
901 | return; | |
902 | ||
ba6a1308 | 903 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
904 | dev = __ata_scsi_find_dev(ap, sdev); |
905 | if (dev && dev->sdev) { | |
906 | /* SCSI device already in CANCEL state, no need to offline it */ | |
907 | dev->sdev = NULL; | |
908 | dev->flags |= ATA_DFLAG_DETACH; | |
909 | ata_port_schedule_eh(ap); | |
910 | } | |
ba6a1308 | 911 | spin_unlock_irqrestore(ap->lock, flags); |
83c47bcb TH |
912 | } |
913 | ||
a6e6ce8e TH |
914 | /** |
915 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
916 | * @sdev: SCSI device to configure queue depth for | |
917 | * @queue_depth: new queue depth | |
918 | * | |
919 | * This is libata standard hostt->change_queue_depth callback. | |
920 | * SCSI will call into this callback when user tries to set queue | |
921 | * depth via sysfs. | |
922 | * | |
923 | * LOCKING: | |
924 | * SCSI layer (we don't care) | |
925 | * | |
926 | * RETURNS: | |
927 | * Newly configured queue depth. | |
928 | */ | |
929 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
930 | { | |
931 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
932 | struct ata_device *dev; | |
360f654e | 933 | unsigned long flags; |
a6e6ce8e | 934 | |
c3c70c44 | 935 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
936 | return sdev->queue_depth; |
937 | ||
938 | dev = ata_scsi_find_dev(ap, sdev); | |
939 | if (!dev || !ata_dev_enabled(dev)) | |
940 | return sdev->queue_depth; | |
941 | ||
c3c70c44 | 942 | /* NCQ enabled? */ |
360f654e | 943 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
944 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
945 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 946 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
947 | queue_depth = 1; |
948 | } | |
360f654e TH |
949 | spin_unlock_irqrestore(ap->lock, flags); |
950 | ||
c3c70c44 TH |
951 | /* limit and apply queue depth */ |
952 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
953 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
954 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
955 | ||
956 | if (sdev->queue_depth == queue_depth) | |
957 | return -EINVAL; | |
958 | ||
959 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
960 | return queue_depth; |
961 | } | |
962 | ||
d9aca22c | 963 | /* XXX: for spindown warning */ |
da071b42 TH |
964 | static void ata_delayed_done_timerfn(unsigned long arg) |
965 | { | |
966 | struct scsi_cmnd *scmd = (void *)arg; | |
967 | ||
968 | scmd->scsi_done(scmd); | |
969 | } | |
970 | ||
d9aca22c | 971 | /* XXX: for spindown warning */ |
da071b42 TH |
972 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
973 | { | |
974 | static struct timer_list timer; | |
975 | ||
976 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
977 | mod_timer(&timer, jiffies + 5 * HZ); | |
978 | } | |
979 | ||
972dcafb DG |
980 | /** |
981 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
982 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
983 | * |
984 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
985 | * (to start). Perhaps these commands should be preceded by | |
986 | * CHECK POWER MODE to see what power mode the device is already in. | |
987 | * [See SAT revision 5 at www.t10.org] | |
988 | * | |
989 | * LOCKING: | |
cca3974e | 990 | * spin_lock_irqsave(host lock) |
972dcafb DG |
991 | * |
992 | * RETURNS: | |
993 | * Zero on success, non-zero on error. | |
994 | */ | |
ad706991 | 995 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 996 | { |
542b1444 | 997 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 998 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 999 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1000 | |
2e5704f6 TH |
1001 | if (scmd->cmd_len < 5) |
1002 | goto invalid_fld; | |
1003 | ||
972dcafb DG |
1004 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1005 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1006 | if (cdb[1] & 0x1) { |
972dcafb DG |
1007 | ; /* ignore IMMED bit, violates sat-r05 */ |
1008 | } | |
542b1444 | 1009 | if (cdb[4] & 0x2) |
ae006510 | 1010 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1011 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1012 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 TH |
1013 | |
1014 | if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) { | |
1015 | /* the device lacks PM support, finish without doing anything */ | |
1016 | scmd->result = SAM_STAT_GOOD; | |
1017 | return 1; | |
1018 | } | |
1019 | ||
542b1444 | 1020 | if (cdb[4] & 0x1) { |
972dcafb | 1021 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1022 | |
1023 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1024 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1025 | |
1026 | tf->lbah = 0x0; | |
1027 | tf->lbam = 0x0; | |
1028 | tf->lbal = 0x0; | |
1029 | tf->device |= ATA_LBA; | |
1030 | } else { | |
1031 | /* CHS */ | |
1032 | tf->lbal = 0x1; /* sect */ | |
1033 | tf->lbam = 0x0; /* cyl low */ | |
1034 | tf->lbah = 0x0; /* cyl high */ | |
1035 | } | |
1036 | ||
972dcafb | 1037 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 TH |
1038 | } else { |
1039 | /* XXX: This is for backward compatibility, will be | |
1040 | * removed. Read Documentation/feature-removal-schedule.txt | |
1041 | * for more info. | |
1042 | */ | |
d9aca22c | 1043 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
1044 | (system_state == SYSTEM_HALT || |
1045 | system_state == SYSTEM_POWER_OFF)) { | |
2dcb407e | 1046 | static unsigned long warned; |
920a4b10 | 1047 | |
da071b42 | 1048 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
1049 | ata_dev_printk(qc->dev, KERN_WARNING, |
1050 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
1051 | "UPDATE SHUTDOWN UTILITY\n"); | |
1052 | ata_dev_printk(qc->dev, KERN_WARNING, | |
1053 | "For more info, visit " | |
1054 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
1055 | |
1056 | /* ->scsi_done is not used, use it for | |
1057 | * delayed completion. | |
1058 | */ | |
1059 | scmd->scsi_done = qc->scsidone; | |
1060 | qc->scsidone = ata_delayed_done; | |
920a4b10 TH |
1061 | } |
1062 | scmd->result = SAM_STAT_GOOD; | |
1063 | return 1; | |
1064 | } | |
1065 | ||
78981a7c RH |
1066 | /* Issue ATA STANDBY IMMEDIATE command */ |
1067 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1068 | } |
78981a7c | 1069 | |
972dcafb DG |
1070 | /* |
1071 | * Standby and Idle condition timers could be implemented but that | |
1072 | * would require libata to implement the Power condition mode page | |
1073 | * and allow the user to change it. Changing mode pages requires | |
1074 | * MODE SELECT to be implemented. | |
1075 | */ | |
1076 | ||
1077 | return 0; | |
ae006510 DG |
1078 | |
1079 | invalid_fld: | |
542b1444 | 1080 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1081 | /* "Invalid field in cbd" */ |
1082 | return 1; | |
972dcafb DG |
1083 | } |
1084 | ||
1085 | ||
1da177e4 LT |
1086 | /** |
1087 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1088 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1089 | * |
1090 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1091 | * FLUSH CACHE EXT. | |
1092 | * | |
1093 | * LOCKING: | |
cca3974e | 1094 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1095 | * |
1096 | * RETURNS: | |
1097 | * Zero on success, non-zero on error. | |
1098 | */ | |
ad706991 | 1099 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1100 | { |
1101 | struct ata_taskfile *tf = &qc->tf; | |
1102 | ||
1103 | tf->flags |= ATA_TFLAG_DEVICE; | |
1104 | tf->protocol = ATA_PROT_NODATA; | |
1105 | ||
6fc49adb | 1106 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1107 | tf->command = ATA_CMD_FLUSH_EXT; |
1108 | else | |
1109 | tf->command = ATA_CMD_FLUSH; | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
3aef5231 AL |
1114 | /** |
1115 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1116 | * @cdb: SCSI command to translate |
3aef5231 AL |
1117 | * |
1118 | * Calculate LBA and transfer length for 6-byte commands. | |
1119 | * | |
1120 | * RETURNS: | |
1121 | * @plba: the LBA | |
1122 | * @plen: the transfer length | |
1123 | */ | |
542b1444 | 1124 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1125 | { |
1126 | u64 lba = 0; | |
6c7b7d2b | 1127 | u32 len; |
3aef5231 AL |
1128 | |
1129 | VPRINTK("six-byte command\n"); | |
1130 | ||
6c7b7d2b | 1131 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1132 | lba |= ((u64)cdb[2]) << 8; |
1133 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1134 | |
6c7b7d2b | 1135 | len = cdb[4]; |
3aef5231 AL |
1136 | |
1137 | *plba = lba; | |
1138 | *plen = len; | |
1139 | } | |
1140 | ||
1141 | /** | |
1142 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1143 | * @cdb: SCSI command to translate |
3aef5231 AL |
1144 | * |
1145 | * Calculate LBA and transfer length for 10-byte commands. | |
1146 | * | |
1147 | * RETURNS: | |
1148 | * @plba: the LBA | |
1149 | * @plen: the transfer length | |
1150 | */ | |
542b1444 | 1151 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1152 | { |
1153 | u64 lba = 0; | |
1154 | u32 len = 0; | |
1155 | ||
1156 | VPRINTK("ten-byte command\n"); | |
1157 | ||
542b1444 TH |
1158 | lba |= ((u64)cdb[2]) << 24; |
1159 | lba |= ((u64)cdb[3]) << 16; | |
1160 | lba |= ((u64)cdb[4]) << 8; | |
1161 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1162 | |
542b1444 TH |
1163 | len |= ((u32)cdb[7]) << 8; |
1164 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1165 | |
1166 | *plba = lba; | |
1167 | *plen = len; | |
1168 | } | |
1169 | ||
1170 | /** | |
1171 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1172 | * @cdb: SCSI command to translate |
3aef5231 AL |
1173 | * |
1174 | * Calculate LBA and transfer length for 16-byte commands. | |
1175 | * | |
1176 | * RETURNS: | |
1177 | * @plba: the LBA | |
1178 | * @plen: the transfer length | |
1179 | */ | |
542b1444 | 1180 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1181 | { |
1182 | u64 lba = 0; | |
1183 | u32 len = 0; | |
1184 | ||
1185 | VPRINTK("sixteen-byte command\n"); | |
1186 | ||
542b1444 TH |
1187 | lba |= ((u64)cdb[2]) << 56; |
1188 | lba |= ((u64)cdb[3]) << 48; | |
1189 | lba |= ((u64)cdb[4]) << 40; | |
1190 | lba |= ((u64)cdb[5]) << 32; | |
1191 | lba |= ((u64)cdb[6]) << 24; | |
1192 | lba |= ((u64)cdb[7]) << 16; | |
1193 | lba |= ((u64)cdb[8]) << 8; | |
1194 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1195 | |
542b1444 TH |
1196 | len |= ((u32)cdb[10]) << 24; |
1197 | len |= ((u32)cdb[11]) << 16; | |
1198 | len |= ((u32)cdb[12]) << 8; | |
1199 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1200 | |
1201 | *plba = lba; | |
1202 | *plen = len; | |
1203 | } | |
1204 | ||
1da177e4 LT |
1205 | /** |
1206 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1207 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1208 | * |
1209 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1210 | * | |
1211 | * LOCKING: | |
cca3974e | 1212 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1213 | * |
1214 | * RETURNS: | |
1215 | * Zero on success, non-zero on error. | |
1216 | */ | |
ad706991 | 1217 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1218 | { |
542b1444 | 1219 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1220 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1221 | struct ata_device *dev = qc->dev; |
1da177e4 | 1222 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1223 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1224 | u64 block; |
1225 | u32 n_block; | |
1da177e4 LT |
1226 | |
1227 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1228 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1229 | |
2e5704f6 TH |
1230 | if (cdb[0] == VERIFY) { |
1231 | if (scmd->cmd_len < 10) | |
1232 | goto invalid_fld; | |
542b1444 | 1233 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1234 | } else if (cdb[0] == VERIFY_16) { |
1235 | if (scmd->cmd_len < 16) | |
1236 | goto invalid_fld; | |
542b1444 | 1237 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1238 | } else |
ae006510 | 1239 | goto invalid_fld; |
1da177e4 | 1240 | |
8bf62ece | 1241 | if (!n_block) |
ae006510 | 1242 | goto nothing_to_do; |
8bf62ece | 1243 | if (block >= dev_sectors) |
ae006510 | 1244 | goto out_of_range; |
8bf62ece | 1245 | if ((block + n_block) > dev_sectors) |
ae006510 | 1246 | goto out_of_range; |
1da177e4 | 1247 | |
07506697 AL |
1248 | if (dev->flags & ATA_DFLAG_LBA) { |
1249 | tf->flags |= ATA_TFLAG_LBA; | |
1250 | ||
c6a33e24 AL |
1251 | if (lba_28_ok(block, n_block)) { |
1252 | /* use LBA28 */ | |
1253 | tf->command = ATA_CMD_VERIFY; | |
1254 | tf->device |= (block >> 24) & 0xf; | |
1255 | } else if (lba_48_ok(block, n_block)) { | |
1256 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1257 | goto out_of_range; | |
07506697 AL |
1258 | |
1259 | /* use LBA48 */ | |
1260 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1261 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1262 | |
8bf62ece | 1263 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1264 | |
8bf62ece AL |
1265 | tf->hob_lbah = (block >> 40) & 0xff; |
1266 | tf->hob_lbam = (block >> 32) & 0xff; | |
1267 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1268 | } else |
1269 | /* request too large even for LBA48 */ | |
1270 | goto out_of_range; | |
8bf62ece AL |
1271 | |
1272 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1273 | |
8bf62ece AL |
1274 | tf->lbah = (block >> 16) & 0xff; |
1275 | tf->lbam = (block >> 8) & 0xff; | |
1276 | tf->lbal = block & 0xff; | |
1da177e4 | 1277 | |
8bf62ece AL |
1278 | tf->device |= ATA_LBA; |
1279 | } else { | |
1280 | /* CHS */ | |
1281 | u32 sect, head, cyl, track; | |
1282 | ||
c6a33e24 AL |
1283 | if (!lba_28_ok(block, n_block)) |
1284 | goto out_of_range; | |
07506697 | 1285 | |
8bf62ece AL |
1286 | /* Convert LBA to CHS */ |
1287 | track = (u32)block / dev->sectors; | |
1288 | cyl = track / dev->heads; | |
1289 | head = track % dev->heads; | |
1290 | sect = (u32)block % dev->sectors + 1; | |
1291 | ||
c187c4b5 AL |
1292 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1293 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1294 | |
1295 | /* Check whether the converted CHS can fit. | |
1296 | Cylinder: 0-65535 | |
8bf62ece AL |
1297 | Head: 0-15 |
1298 | Sector: 1-255*/ | |
2e9edbf8 | 1299 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1300 | goto out_of_range; |
2e9edbf8 | 1301 | |
8bf62ece AL |
1302 | tf->command = ATA_CMD_VERIFY; |
1303 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1304 | tf->lbal = sect; | |
1305 | tf->lbam = cyl; | |
1306 | tf->lbah = cyl >> 8; | |
1307 | tf->device |= head; | |
1308 | } | |
1da177e4 LT |
1309 | |
1310 | return 0; | |
ae006510 DG |
1311 | |
1312 | invalid_fld: | |
542b1444 | 1313 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1314 | /* "Invalid field in cbd" */ |
1315 | return 1; | |
1316 | ||
1317 | out_of_range: | |
542b1444 | 1318 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1319 | /* "Logical Block Address out of range" */ |
1320 | return 1; | |
1321 | ||
1322 | nothing_to_do: | |
542b1444 | 1323 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1324 | return 1; |
1da177e4 LT |
1325 | } |
1326 | ||
1327 | /** | |
1328 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1329 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1330 | * |
1331 | * Converts any of six SCSI read/write commands into the | |
1332 | * ATA counterpart, including starting sector (LBA), | |
1333 | * sector count, and taking into account the device's LBA48 | |
1334 | * support. | |
1335 | * | |
1336 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1337 | * %WRITE_16 are currently supported. | |
1338 | * | |
1339 | * LOCKING: | |
cca3974e | 1340 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1341 | * |
1342 | * RETURNS: | |
1343 | * Zero on success, non-zero on error. | |
1344 | */ | |
ad706991 | 1345 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1346 | { |
542b1444 | 1347 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1348 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1349 | unsigned int tf_flags = 0; |
3aef5231 AL |
1350 | u64 block; |
1351 | u32 n_block; | |
bd056d7e | 1352 | int rc; |
1da177e4 | 1353 | |
542b1444 | 1354 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1355 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1356 | |
9a3dccc4 | 1357 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1358 | switch (cdb[0]) { |
3aef5231 AL |
1359 | case READ_10: |
1360 | case WRITE_10: | |
2e5704f6 TH |
1361 | if (unlikely(scmd->cmd_len < 10)) |
1362 | goto invalid_fld; | |
542b1444 TH |
1363 | scsi_10_lba_len(cdb, &block, &n_block); |
1364 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1365 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1366 | break; |
1367 | case READ_6: | |
1368 | case WRITE_6: | |
2e5704f6 TH |
1369 | if (unlikely(scmd->cmd_len < 6)) |
1370 | goto invalid_fld; | |
542b1444 | 1371 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1372 | |
1373 | /* for 6-byte r/w commands, transfer length 0 | |
1374 | * means 256 blocks of data, not 0 block. | |
1375 | */ | |
76b2bf9b JG |
1376 | if (!n_block) |
1377 | n_block = 256; | |
3aef5231 AL |
1378 | break; |
1379 | case READ_16: | |
1380 | case WRITE_16: | |
2e5704f6 TH |
1381 | if (unlikely(scmd->cmd_len < 16)) |
1382 | goto invalid_fld; | |
542b1444 TH |
1383 | scsi_16_lba_len(cdb, &block, &n_block); |
1384 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1385 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1386 | break; |
1387 | default: | |
8bf62ece | 1388 | DPRINTK("no-byte command\n"); |
ae006510 | 1389 | goto invalid_fld; |
1da177e4 LT |
1390 | } |
1391 | ||
8bf62ece AL |
1392 | /* Check and compose ATA command */ |
1393 | if (!n_block) | |
c187c4b5 AL |
1394 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1395 | * length 0 means transfer 0 block of data. | |
1396 | * However, for ATA R/W commands, sector count 0 means | |
1397 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1398 | * |
1399 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1400 | */ |
ae006510 | 1401 | goto nothing_to_do; |
1da177e4 | 1402 | |
bd056d7e | 1403 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1404 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1405 | |
bd056d7e TH |
1406 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1407 | qc->tag); | |
1408 | if (likely(rc == 0)) | |
1409 | return 0; | |
ae006510 | 1410 | |
bd056d7e TH |
1411 | if (rc == -ERANGE) |
1412 | goto out_of_range; | |
1413 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1414 | invalid_fld: |
542b1444 | 1415 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1416 | /* "Invalid field in cbd" */ |
1417 | return 1; | |
1418 | ||
1419 | out_of_range: | |
542b1444 | 1420 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1421 | /* "Logical Block Address out of range" */ |
1422 | return 1; | |
1423 | ||
1424 | nothing_to_do: | |
542b1444 | 1425 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1426 | return 1; |
1da177e4 LT |
1427 | } |
1428 | ||
77853bf2 | 1429 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1430 | { |
c31f571d | 1431 | struct ata_port *ap = qc->ap; |
1da177e4 | 1432 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1433 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1434 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1435 | |
1436 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1437 | * user mandated it or if there's an error. Note that if we | |
1438 | * generate because the user forced us to, a check condition | |
1439 | * is generated and the ATA register values are returned | |
1440 | * whether the command completed successfully or not. If there | |
1441 | * was no error, SK, ASC and ASCQ will all be zero. | |
1442 | */ | |
a7dac447 | 1443 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1444 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1445 | ata_gen_passthru_sense(qc); |
b095518e JG |
1446 | } else { |
1447 | if (!need_sense) { | |
1448 | cmd->result = SAM_STAT_GOOD; | |
1449 | } else { | |
1450 | /* TODO: decide which descriptor format to use | |
1451 | * for 48b LBA devices and call that here | |
1452 | * instead of the fixed desc, which is only | |
1453 | * good for smaller LBA (and maybe CHS?) | |
1454 | * devices. | |
1455 | */ | |
750426aa | 1456 | ata_gen_ata_sense(qc); |
b095518e JG |
1457 | } |
1458 | } | |
1da177e4 | 1459 | |
d9aca22c | 1460 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1461 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1462 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1463 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1464 | else if (likely(system_state != SYSTEM_HALT && | |
1465 | system_state != SYSTEM_POWER_OFF)) | |
1466 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1467 | ||
c31f571d | 1468 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1469 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1470 | |
1471 | qc->scsidone(cmd); | |
1472 | ||
77853bf2 | 1473 | ata_qc_free(qc); |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | /** | |
1477 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1478 | * @dev: ATA device to which the command is addressed |
1479 | * @cmd: SCSI command to execute | |
1480 | * @done: SCSI command completion function | |
1481 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1482 | * | |
1483 | * Our ->queuecommand() function has decided that the SCSI | |
1484 | * command issued can be directly translated into an ATA | |
1485 | * command, rather than handled internally. | |
1486 | * | |
1487 | * This function sets up an ata_queued_cmd structure for the | |
1488 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1489 | * | |
ae006510 DG |
1490 | * The xlat_func argument (actor) returns 0 if ready to execute |
1491 | * ATA command, else 1 to finish translation. If 1 is returned | |
1492 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1493 | * to be set reflecting an error condition or clean (early) | |
1494 | * termination. | |
1495 | * | |
1da177e4 | 1496 | * LOCKING: |
cca3974e | 1497 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1498 | * |
1499 | * RETURNS: | |
1500 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1501 | * needs to be deferred. | |
1da177e4 | 1502 | */ |
2115ea94 TH |
1503 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1504 | void (*done)(struct scsi_cmnd *), | |
1505 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1506 | { |
31cc23b3 | 1507 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1508 | struct ata_queued_cmd *qc; |
31cc23b3 | 1509 | int rc; |
1da177e4 LT |
1510 | |
1511 | VPRINTK("ENTER\n"); | |
1512 | ||
3373efd8 | 1513 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1514 | if (!qc) |
ae006510 | 1515 | goto err_mem; |
1da177e4 LT |
1516 | |
1517 | /* data is present; dma-map it */ | |
be7db055 CH |
1518 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1519 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1520 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1521 | ata_dev_printk(dev, KERN_WARNING, |
1522 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1523 | goto err_did; |
1da177e4 LT |
1524 | } |
1525 | ||
7120165c | 1526 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1527 | |
1528 | qc->dma_dir = cmd->sc_data_direction; | |
1529 | } | |
1530 | ||
1531 | qc->complete_fn = ata_scsi_qc_complete; | |
1532 | ||
ad706991 | 1533 | if (xlat_func(qc)) |
ae006510 | 1534 | goto early_finish; |
1da177e4 | 1535 | |
31cc23b3 TH |
1536 | if (ap->ops->qc_defer) { |
1537 | if ((rc = ap->ops->qc_defer(qc))) | |
1538 | goto defer; | |
1539 | } | |
1540 | ||
1da177e4 | 1541 | /* select device, send command to hardware */ |
8e0e694a | 1542 | ata_qc_issue(qc); |
1da177e4 LT |
1543 | |
1544 | VPRINTK("EXIT\n"); | |
2115ea94 | 1545 | return 0; |
1da177e4 | 1546 | |
ae006510 | 1547 | early_finish: |
2dcb407e | 1548 | ata_qc_free(qc); |
da071b42 | 1549 | qc->scsidone(cmd); |
ae006510 | 1550 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1551 | return 0; |
ae006510 DG |
1552 | |
1553 | err_did: | |
1da177e4 | 1554 | ata_qc_free(qc); |
ae006510 | 1555 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1556 | qc->scsidone(cmd); |
253b92ec | 1557 | err_mem: |
ae006510 | 1558 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1559 | return 0; |
3dc1d881 TH |
1560 | |
1561 | defer: | |
31cc23b3 | 1562 | ata_qc_free(qc); |
3dc1d881 | 1563 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1564 | if (rc == ATA_DEFER_LINK) |
1565 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1566 | else | |
1567 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1568 | } |
1569 | ||
1570 | /** | |
1571 | * ata_scsi_rbuf_get - Map response buffer. | |
1572 | * @cmd: SCSI command containing buffer to be mapped. | |
1573 | * @buf_out: Pointer to mapped area. | |
1574 | * | |
1575 | * Maps buffer contained within SCSI command @cmd. | |
1576 | * | |
1577 | * LOCKING: | |
cca3974e | 1578 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1579 | * |
1580 | * RETURNS: | |
1581 | * Length of response buffer. | |
1582 | */ | |
1583 | ||
1584 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1585 | { | |
1586 | u8 *buf; | |
1587 | unsigned int buflen; | |
1588 | ||
7120165c | 1589 | struct scatterlist *sg = scsi_sglist(cmd); |
1da177e4 | 1590 | |
e10b8c3f | 1591 | if (sg) { |
45711f1a | 1592 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; |
1da177e4 LT |
1593 | buflen = sg->length; |
1594 | } else { | |
e10b8c3f BH |
1595 | buf = NULL; |
1596 | buflen = 0; | |
1da177e4 LT |
1597 | } |
1598 | ||
1599 | *buf_out = buf; | |
1600 | return buflen; | |
1601 | } | |
1602 | ||
1603 | /** | |
1604 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1605 | * @cmd: SCSI command containing buffer to be unmapped. | |
1606 | * @buf: buffer to unmap | |
1607 | * | |
1608 | * Unmaps response buffer contained within @cmd. | |
1609 | * | |
1610 | * LOCKING: | |
cca3974e | 1611 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1612 | */ |
1613 | ||
1614 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1615 | { | |
7120165c | 1616 | struct scatterlist *sg = scsi_sglist(cmd); |
e10b8c3f | 1617 | if (sg) |
da02d2a1 | 1618 | kunmap_atomic(buf - sg->offset, KM_IRQ0); |
1da177e4 LT |
1619 | } |
1620 | ||
1621 | /** | |
1622 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1623 | * @args: device IDENTIFY data / SCSI command of interest. | |
1624 | * @actor: Callback hook for desired SCSI command simulator | |
1625 | * | |
1626 | * Takes care of the hard work of simulating a SCSI command... | |
1627 | * Mapping the response buffer, calling the command's handler, | |
1628 | * and handling the handler's return value. This return value | |
1629 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1630 | * completed successfully (0), or not (in which case cmd->result |
1631 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1632 | * |
1633 | * LOCKING: | |
cca3974e | 1634 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1635 | */ |
1636 | ||
1637 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
2dcb407e JG |
1638 | unsigned int (*actor) (struct ata_scsi_args *args, |
1639 | u8 *rbuf, unsigned int buflen)) | |
1da177e4 LT |
1640 | { |
1641 | u8 *rbuf; | |
1642 | unsigned int buflen, rc; | |
1643 | struct scsi_cmnd *cmd = args->cmd; | |
1644 | ||
1645 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1646 | memset(rbuf, 0, buflen); | |
1647 | rc = actor(args, rbuf, buflen); | |
1648 | ata_scsi_rbuf_put(cmd, rbuf); | |
1649 | ||
ae006510 | 1650 | if (rc == 0) |
1da177e4 | 1651 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1652 | args->done(cmd); |
1da177e4 LT |
1653 | } |
1654 | ||
6a36261e TH |
1655 | /** |
1656 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1657 | * @idx: byte index into SCSI response buffer | |
1658 | * @val: value to set | |
1659 | * | |
1660 | * To be used by SCSI command simulator functions. This macros | |
1661 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1662 | * are in scope. | |
1663 | * | |
1664 | * LOCKING: | |
1665 | * None. | |
1666 | */ | |
1667 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1668 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1669 | } while (0) | |
1670 | ||
1da177e4 LT |
1671 | /** |
1672 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1673 | * @args: device IDENTIFY data / SCSI command of interest. | |
1674 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1675 | * @buflen: Response buffer length. | |
1676 | * | |
1677 | * Returns standard device identification data associated | |
b142eb65 | 1678 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1679 | * |
1680 | * LOCKING: | |
cca3974e | 1681 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1682 | */ |
1683 | ||
1684 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1685 | unsigned int buflen) | |
1686 | { | |
1687 | u8 hdr[] = { | |
1688 | TYPE_DISK, | |
1689 | 0, | |
1690 | 0x5, /* claim SPC-3 version compatibility */ | |
1691 | 2, | |
1692 | 95 - 4 | |
1693 | }; | |
1694 | ||
1695 | /* set scsi removeable (RMB) bit per ata bit */ | |
1696 | if (ata_id_removeable(args->id)) | |
1697 | hdr[1] |= (1 << 7); | |
1698 | ||
1699 | VPRINTK("ENTER\n"); | |
1700 | ||
1701 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1702 | ||
1703 | if (buflen > 35) { | |
1704 | memcpy(&rbuf[8], "ATA ", 8); | |
a0cf733b TH |
1705 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); |
1706 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 LT |
1707 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1708 | memcpy(&rbuf[32], "n/a ", 4); | |
1709 | } | |
1710 | ||
1711 | if (buflen > 63) { | |
1712 | const u8 versions[] = { | |
1713 | 0x60, /* SAM-3 (no version claimed) */ | |
1714 | ||
1715 | 0x03, | |
1716 | 0x20, /* SBC-2 (no version claimed) */ | |
1717 | ||
1718 | 0x02, | |
1719 | 0x60 /* SPC-3 (no version claimed) */ | |
1720 | }; | |
1721 | ||
1722 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1723 | } | |
1724 | ||
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | /** | |
b142eb65 | 1729 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1730 | * @args: device IDENTIFY data / SCSI command of interest. |
1731 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1732 | * @buflen: Response buffer length. | |
1733 | * | |
b142eb65 | 1734 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1735 | * |
1736 | * LOCKING: | |
cca3974e | 1737 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1738 | */ |
1739 | ||
1740 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1741 | unsigned int buflen) | |
1742 | { | |
1743 | const u8 pages[] = { | |
1744 | 0x00, /* page 0x00, this page */ | |
1745 | 0x80, /* page 0x80, unit serial no page */ | |
1746 | 0x83 /* page 0x83, device ident page */ | |
1747 | }; | |
b142eb65 | 1748 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1749 | |
1750 | if (buflen > 6) | |
1751 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1752 | ||
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | /** | |
b142eb65 | 1757 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1758 | * @args: device IDENTIFY data / SCSI command of interest. |
1759 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1760 | * @buflen: Response buffer length. | |
1761 | * | |
1762 | * Returns ATA device serial number. | |
1763 | * | |
1764 | * LOCKING: | |
cca3974e | 1765 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1766 | */ |
1767 | ||
1768 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1769 | unsigned int buflen) | |
1770 | { | |
1771 | const u8 hdr[] = { | |
1772 | 0, | |
1773 | 0x80, /* this page code */ | |
1774 | 0, | |
a0cf733b | 1775 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 LT |
1776 | }; |
1777 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1778 | ||
a0cf733b | 1779 | if (buflen > (ATA_ID_SERNO_LEN + 4 - 1)) |
6a62a04d | 1780 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
a0cf733b | 1781 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1da177e4 LT |
1782 | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1da177e4 | 1786 | /** |
b142eb65 | 1787 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1788 | * @args: device IDENTIFY data / SCSI command of interest. |
1789 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1790 | * @buflen: Response buffer length. | |
1791 | * | |
b142eb65 JG |
1792 | * Yields two logical unit device identification designators: |
1793 | * - vendor specific ASCII containing the ATA serial number | |
1794 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1795 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1796 | * |
1797 | * LOCKING: | |
cca3974e | 1798 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1799 | */ |
1800 | ||
1801 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1802 | unsigned int buflen) | |
1803 | { | |
b142eb65 JG |
1804 | int num; |
1805 | const int sat_model_serial_desc_len = 68; | |
1da177e4 | 1806 | |
b142eb65 JG |
1807 | rbuf[1] = 0x83; /* this page code */ |
1808 | num = 4; | |
1809 | ||
a0cf733b | 1810 | if (buflen > (ATA_ID_SERNO_LEN + num + 3)) { |
b142eb65 | 1811 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2e9edbf8 | 1812 | rbuf[num + 0] = 2; |
a0cf733b | 1813 | rbuf[num + 3] = ATA_ID_SERNO_LEN; |
b142eb65 JG |
1814 | num += 4; |
1815 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1816 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1817 | num += ATA_ID_SERNO_LEN; | |
1da177e4 | 1818 | } |
b142eb65 JG |
1819 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1820 | /* SAT defined lu model and serial numbers descriptor */ | |
1821 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1822 | rbuf[num + 0] = 2; |
1823 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1824 | rbuf[num + 3] = sat_model_serial_desc_len; |
1825 | num += 4; | |
1826 | memcpy(rbuf + num, "ATA ", 8); | |
1827 | num += 8; | |
1828 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1829 | ATA_ID_PROD, ATA_ID_PROD_LEN); |
1830 | num += ATA_ID_PROD_LEN; | |
b142eb65 | 1831 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
a0cf733b TH |
1832 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1833 | num += ATA_ID_SERNO_LEN; | |
b142eb65 JG |
1834 | } |
1835 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1836 | return 0; |
1837 | } | |
1838 | ||
ad355b46 JG |
1839 | /** |
1840 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
1841 | * @args: device IDENTIFY data / SCSI command of interest. | |
1842 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1843 | * @buflen: Response buffer length. | |
1844 | * | |
1845 | * Yields SAT-specified ATA VPD page. | |
1846 | * | |
1847 | * LOCKING: | |
1848 | * spin_lock_irqsave(host lock) | |
1849 | */ | |
1850 | ||
1851 | unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf, | |
1852 | unsigned int buflen) | |
1853 | { | |
1854 | u8 pbuf[60]; | |
1855 | struct ata_taskfile tf; | |
1856 | unsigned int i; | |
1857 | ||
1858 | if (!buflen) | |
1859 | return 0; | |
1860 | ||
1861 | memset(&pbuf, 0, sizeof(pbuf)); | |
1862 | memset(&tf, 0, sizeof(tf)); | |
1863 | ||
1864 | pbuf[1] = 0x89; /* our page code */ | |
1865 | pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
1866 | pbuf[3] = (0x238 & 0xff); | |
1867 | ||
c78968bb JG |
1868 | memcpy(&pbuf[8], "linux ", 8); |
1869 | memcpy(&pbuf[16], "libata ", 16); | |
1870 | memcpy(&pbuf[32], DRV_VERSION, 4); | |
ad355b46 JG |
1871 | ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4); |
1872 | ||
1873 | /* we don't store the ATA device signature, so we fake it */ | |
1874 | ||
1875 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
1876 | tf.lbal = 0x1; | |
1877 | tf.nsect = 0x1; | |
1878 | ||
1879 | ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */ | |
1880 | pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
1881 | ||
1882 | pbuf[56] = ATA_CMD_ID_ATA; | |
1883 | ||
1884 | i = min(buflen, 60U); | |
1885 | memcpy(rbuf, &pbuf[0], i); | |
1886 | buflen -= i; | |
1887 | ||
1888 | if (!buflen) | |
1889 | return 0; | |
1890 | ||
1891 | memcpy(&rbuf[60], &args->id[0], min(buflen, 512U)); | |
1892 | return 0; | |
1893 | } | |
1894 | ||
1da177e4 | 1895 | /** |
0cba632b | 1896 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1897 | * @args: device IDENTIFY data / SCSI command of interest. |
1898 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1899 | * @buflen: Response buffer length. | |
1900 | * | |
1901 | * No operation. Simply returns success to caller, to indicate | |
1902 | * that the caller should successfully complete this SCSI command. | |
1903 | * | |
1904 | * LOCKING: | |
cca3974e | 1905 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1906 | */ |
1907 | ||
1908 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1909 | unsigned int buflen) | |
1910 | { | |
1911 | VPRINTK("ENTER\n"); | |
1912 | return 0; | |
1913 | } | |
1914 | ||
1915 | /** | |
1916 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1917 | * @ptr_io: (input/output) Location to store more output data | |
1918 | * @last: End of output data buffer | |
1919 | * @buf: Pointer to BLOB being added to output buffer | |
1920 | * @buflen: Length of BLOB | |
1921 | * | |
1922 | * Store MODE SENSE data on an output buffer. | |
1923 | * | |
1924 | * LOCKING: | |
1925 | * None. | |
1926 | */ | |
1927 | ||
1928 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1929 | const u8 *buf, unsigned int buflen) | |
1930 | { | |
1931 | u8 *ptr = *ptr_io; | |
1932 | ||
1933 | if ((ptr + buflen - 1) > last) | |
1934 | return; | |
1935 | ||
1936 | memcpy(ptr, buf, buflen); | |
1937 | ||
1938 | ptr += buflen; | |
1939 | ||
1940 | *ptr_io = ptr; | |
1941 | } | |
1942 | ||
1943 | /** | |
1944 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1945 | * @id: device IDENTIFY data | |
1946 | * @ptr_io: (input/output) Location to store more output data | |
1947 | * @last: End of output data buffer | |
1948 | * | |
1949 | * Generate a caching info page, which conditionally indicates | |
1950 | * write caching to the SCSI layer, depending on device | |
1951 | * capabilities. | |
1952 | * | |
1953 | * LOCKING: | |
1954 | * None. | |
1955 | */ | |
1956 | ||
1957 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1958 | const u8 *last) | |
1959 | { | |
00ac37f5 | 1960 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1961 | |
00ac37f5 | 1962 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1963 | if (ata_id_wcache_enabled(id)) |
1964 | page[2] |= (1 << 2); /* write cache enable */ | |
1965 | if (!ata_id_rahead_enabled(id)) | |
1966 | page[12] |= (1 << 5); /* disable read ahead */ | |
1967 | ||
1968 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1969 | return sizeof(page); | |
1970 | } | |
1971 | ||
1972 | /** | |
1973 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1974 | * @dev: Device associated with this MODE SENSE command | |
1975 | * @ptr_io: (input/output) Location to store more output data | |
1976 | * @last: End of output data buffer | |
1977 | * | |
1978 | * Generate a generic MODE SENSE control mode page. | |
1979 | * | |
1980 | * LOCKING: | |
1981 | * None. | |
1982 | */ | |
1983 | ||
1984 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1985 | { | |
00ac37f5 DG |
1986 | ata_msense_push(ptr_io, last, def_control_mpage, |
1987 | sizeof(def_control_mpage)); | |
1988 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1989 | } |
1990 | ||
1991 | /** | |
1992 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1993 | * @dev: Device associated with this MODE SENSE command | |
1994 | * @ptr_io: (input/output) Location to store more output data | |
1995 | * @last: End of output data buffer | |
1996 | * | |
1997 | * Generate a generic MODE SENSE r/w error recovery page. | |
1998 | * | |
1999 | * LOCKING: | |
2000 | * None. | |
2001 | */ | |
2002 | ||
2003 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
2004 | { | |
1da177e4 | 2005 | |
00ac37f5 DG |
2006 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
2007 | sizeof(def_rw_recovery_mpage)); | |
2008 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
2009 | } |
2010 | ||
48bdc8ec JA |
2011 | /* |
2012 | * We can turn this into a real blacklist if it's needed, for now just | |
2013 | * blacklist any Maxtor BANC1G10 revision firmware | |
2014 | */ | |
2015 | static int ata_dev_supports_fua(u16 *id) | |
2016 | { | |
a0cf733b | 2017 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2018 | |
c3c013a2 JG |
2019 | if (!libata_fua) |
2020 | return 0; | |
48bdc8ec JA |
2021 | if (!ata_id_has_fua(id)) |
2022 | return 0; | |
2023 | ||
a0cf733b TH |
2024 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2025 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2026 | |
2e02671d | 2027 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2028 | return 1; |
2e02671d | 2029 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2030 | return 1; |
2031 | ||
2032 | return 0; /* blacklisted */ | |
2033 | } | |
2034 | ||
1da177e4 LT |
2035 | /** |
2036 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2037 | * @args: device IDENTIFY data / SCSI command of interest. | |
2038 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2039 | * @buflen: Response buffer length. | |
2040 | * | |
00ac37f5 DG |
2041 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2042 | * access devices (e.g. disks) only. There should be no block | |
2043 | * descriptor for other device types. | |
1da177e4 LT |
2044 | * |
2045 | * LOCKING: | |
cca3974e | 2046 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2047 | */ |
2048 | ||
2049 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
2050 | unsigned int buflen) | |
2051 | { | |
9a3dccc4 | 2052 | struct ata_device *dev = args->dev; |
1da177e4 | 2053 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
2054 | const u8 sat_blk_desc[] = { |
2055 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2056 | 0, | |
2057 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2058 | }; | |
2059 | u8 pg, spg; | |
2060 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 2061 | u8 dpofua; |
1da177e4 LT |
2062 | |
2063 | VPRINTK("ENTER\n"); | |
2064 | ||
2065 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2066 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2067 | /* | |
2068 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2069 | */ |
00ac37f5 | 2070 | |
1da177e4 | 2071 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2072 | switch (page_control) { |
2073 | case 0: /* current */ | |
2074 | break; /* supported */ | |
2075 | case 3: /* saved */ | |
2076 | goto saving_not_supp; | |
2077 | case 1: /* changeable */ | |
2078 | case 2: /* defaults */ | |
2079 | default: | |
2080 | goto invalid_fld; | |
2081 | } | |
1da177e4 | 2082 | |
00ac37f5 DG |
2083 | if (six_byte) { |
2084 | output_len = 4 + (ebd ? 8 : 0); | |
2085 | alloc_len = scsicmd[4]; | |
2086 | } else { | |
2087 | output_len = 8 + (ebd ? 8 : 0); | |
2088 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2089 | } | |
2090 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
2091 | |
2092 | p = rbuf + output_len; | |
00ac37f5 | 2093 | last = rbuf + minlen - 1; |
1da177e4 | 2094 | |
00ac37f5 DG |
2095 | pg = scsicmd[2] & 0x3f; |
2096 | spg = scsicmd[3]; | |
2097 | /* | |
2098 | * No mode subpages supported (yet) but asking for _all_ | |
2099 | * subpages may be valid | |
2100 | */ | |
2101 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2102 | goto invalid_fld; | |
2103 | ||
2104 | switch(pg) { | |
2105 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
2106 | output_len += ata_msense_rw_recovery(&p, last); |
2107 | break; | |
2108 | ||
00ac37f5 | 2109 | case CACHE_MPAGE: |
1da177e4 LT |
2110 | output_len += ata_msense_caching(args->id, &p, last); |
2111 | break; | |
2112 | ||
00ac37f5 | 2113 | case CONTROL_MPAGE: { |
1da177e4 LT |
2114 | output_len += ata_msense_ctl_mode(&p, last); |
2115 | break; | |
2116 | } | |
2117 | ||
00ac37f5 | 2118 | case ALL_MPAGES: |
1da177e4 LT |
2119 | output_len += ata_msense_rw_recovery(&p, last); |
2120 | output_len += ata_msense_caching(args->id, &p, last); | |
2121 | output_len += ata_msense_ctl_mode(&p, last); | |
2122 | break; | |
2123 | ||
2124 | default: /* invalid page code */ | |
ae006510 | 2125 | goto invalid_fld; |
1da177e4 LT |
2126 | } |
2127 | ||
00ac37f5 DG |
2128 | if (minlen < 1) |
2129 | return 0; | |
9a3dccc4 TH |
2130 | |
2131 | dpofua = 0; | |
f79d409f | 2132 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2133 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2134 | dpofua = 1 << 4; | |
2135 | ||
1da177e4 LT |
2136 | if (six_byte) { |
2137 | output_len--; | |
2138 | rbuf[0] = output_len; | |
9a3dccc4 TH |
2139 | if (minlen > 2) |
2140 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
2141 | if (ebd) { |
2142 | if (minlen > 3) | |
2143 | rbuf[3] = sizeof(sat_blk_desc); | |
2144 | if (minlen > 11) | |
2145 | memcpy(rbuf + 4, sat_blk_desc, | |
2146 | sizeof(sat_blk_desc)); | |
2147 | } | |
1da177e4 LT |
2148 | } else { |
2149 | output_len -= 2; | |
2150 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
2151 | if (minlen > 1) |
2152 | rbuf[1] = output_len; | |
9a3dccc4 TH |
2153 | if (minlen > 3) |
2154 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
2155 | if (ebd) { |
2156 | if (minlen > 7) | |
2157 | rbuf[7] = sizeof(sat_blk_desc); | |
2158 | if (minlen > 15) | |
2159 | memcpy(rbuf + 8, sat_blk_desc, | |
2160 | sizeof(sat_blk_desc)); | |
2161 | } | |
1da177e4 | 2162 | } |
1da177e4 | 2163 | return 0; |
ae006510 DG |
2164 | |
2165 | invalid_fld: | |
2166 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2167 | /* "Invalid field in cbd" */ | |
2168 | return 1; | |
2169 | ||
2170 | saving_not_supp: | |
2171 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2172 | /* "Saving parameters not supported" */ | |
2173 | return 1; | |
1da177e4 LT |
2174 | } |
2175 | ||
2176 | /** | |
2177 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2178 | * @args: device IDENTIFY data / SCSI command of interest. | |
2179 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2180 | * @buflen: Response buffer length. | |
2181 | * | |
2182 | * Simulate READ CAPACITY commands. | |
2183 | * | |
2184 | * LOCKING: | |
6a36261e | 2185 | * None. |
1da177e4 | 2186 | */ |
1da177e4 | 2187 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
2dcb407e | 2188 | unsigned int buflen) |
1da177e4 | 2189 | { |
6a36261e | 2190 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2191 | |
2192 | VPRINTK("ENTER\n"); | |
2193 | ||
1da177e4 | 2194 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2195 | if (last_lba >= 0xffffffffULL) |
2196 | last_lba = 0xffffffff; | |
0c144d0d | 2197 | |
1da177e4 | 2198 | /* sector count, 32-bit */ |
6a36261e TH |
2199 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); |
2200 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2201 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2202 | ATA_SCSI_RBUF_SET(3, last_lba); | |
1da177e4 LT |
2203 | |
2204 | /* sector size */ | |
6a36261e TH |
2205 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); |
2206 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE); | |
1da177e4 LT |
2207 | } else { |
2208 | /* sector count, 64-bit */ | |
6a36261e TH |
2209 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); |
2210 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2211 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2212 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2213 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2214 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2215 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2216 | ATA_SCSI_RBUF_SET(7, last_lba); | |
1da177e4 LT |
2217 | |
2218 | /* sector size */ | |
6a36261e TH |
2219 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); |
2220 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE); | |
1da177e4 LT |
2221 | } |
2222 | ||
2223 | return 0; | |
2224 | } | |
2225 | ||
2226 | /** | |
2227 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2228 | * @args: device IDENTIFY data / SCSI command of interest. | |
2229 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2230 | * @buflen: Response buffer length. | |
2231 | * | |
2232 | * Simulate REPORT LUNS command. | |
2233 | * | |
2234 | * LOCKING: | |
cca3974e | 2235 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2236 | */ |
2237 | ||
2238 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2239 | unsigned int buflen) | |
2240 | { | |
2241 | VPRINTK("ENTER\n"); | |
2242 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2243 | ||
2244 | return 0; | |
2245 | } | |
2246 | ||
845c5834 DG |
2247 | /** |
2248 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2249 | * @cmd: SCSI request to be handled | |
2250 | * @sk: SCSI-defined sense key | |
2251 | * @asc: SCSI-defined additional sense code | |
2252 | * @ascq: SCSI-defined additional sense code qualifier | |
2253 | * | |
2254 | * Helper function that builds a valid fixed format, current | |
2255 | * response code and the given sense key (sk), additional sense | |
2256 | * code (asc) and additional sense code qualifier (ascq) with | |
2257 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2258 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2259 | * | |
2260 | * LOCKING: | |
2261 | * Not required | |
2262 | */ | |
2263 | ||
2264 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2265 | { | |
2266 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2267 | ||
2268 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2269 | cmd->sense_buffer[2] = sk; | |
2270 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2271 | cmd->sense_buffer[12] = asc; | |
2272 | cmd->sense_buffer[13] = ascq; | |
2273 | } | |
2274 | ||
1da177e4 LT |
2275 | /** |
2276 | * ata_scsi_badcmd - End a SCSI request with an error | |
2277 | * @cmd: SCSI request to be handled | |
2278 | * @done: SCSI command completion function | |
2279 | * @asc: SCSI-defined additional sense code | |
2280 | * @ascq: SCSI-defined additional sense code qualifier | |
2281 | * | |
2282 | * Helper function that completes a SCSI command with | |
2283 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2284 | * and the specified additional sense codes. | |
2285 | * | |
2286 | * LOCKING: | |
cca3974e | 2287 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2288 | */ |
2289 | ||
2290 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2291 | { | |
2292 | DPRINTK("ENTER\n"); | |
ae006510 | 2293 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2294 | |
2295 | done(cmd); | |
2296 | } | |
2297 | ||
77853bf2 | 2298 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2299 | { |
74e6c8c3 | 2300 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2301 | /* FIXME: not quite right; we don't want the |
2302 | * translation of taskfile registers into | |
2303 | * a sense descriptors, since that's only | |
2304 | * correct for ATA, not ATAPI | |
2305 | */ | |
750426aa | 2306 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2307 | } |
a939c963 | 2308 | |
c6e6e666 | 2309 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2310 | ata_qc_free(qc); |
c6e6e666 | 2311 | } |
a939c963 | 2312 | |
c6e6e666 JG |
2313 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2314 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2315 | { | |
2316 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2317 | } | |
2318 | ||
2319 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2320 | { | |
2321 | struct ata_port *ap = qc->ap; | |
2322 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2323 | ||
2324 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2325 | |
2326 | /* FIXME: is this needed? */ | |
2327 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2328 | ||
c6e6e666 JG |
2329 | ap->ops->tf_read(ap, &qc->tf); |
2330 | ||
2331 | /* fill these in, for the case where they are -not- overwritten */ | |
2332 | cmd->sense_buffer[0] = 0x70; | |
2333 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2334 | ||
2335 | ata_qc_reinit(qc); | |
2336 | ||
a939c963 JG |
2337 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
2338 | qc->dma_dir = DMA_FROM_DEVICE; | |
2339 | ||
6e7846e9 | 2340 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2341 | qc->cdb[0] = REQUEST_SENSE; |
2342 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2343 | ||
2344 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2345 | qc->tf.command = ATA_CMD_PACKET; | |
2346 | ||
c6e6e666 JG |
2347 | if (ata_pio_use_silly(ap)) { |
2348 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2349 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2350 | } else { | |
2351 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2db78dd3 AC |
2352 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2353 | qc->tf.lbah = 0; | |
c6e6e666 | 2354 | } |
a939c963 JG |
2355 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2356 | ||
c6e6e666 | 2357 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2358 | |
8e0e694a | 2359 | ata_qc_issue(qc); |
a939c963 JG |
2360 | |
2361 | DPRINTK("EXIT\n"); | |
2362 | } | |
2363 | ||
77853bf2 | 2364 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2365 | { |
2366 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2367 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2368 | |
a7dac447 | 2369 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2370 | |
246619da TH |
2371 | /* handle completion from new EH */ |
2372 | if (unlikely(qc->ap->ops->error_handler && | |
2373 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2374 | ||
2375 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2376 | /* FIXME: not quite right; we don't want the | |
2377 | * translation of taskfile registers into a | |
2378 | * sense descriptors, since that's only | |
2379 | * correct for ATA, not ATAPI | |
2380 | */ | |
750426aa | 2381 | ata_gen_passthru_sense(qc); |
246619da TH |
2382 | } |
2383 | ||
22aac089 TH |
2384 | /* SCSI EH automatically locks door if sdev->locked is |
2385 | * set. Sometimes door lock request continues to | |
2386 | * fail, for example, when no media is present. This | |
2387 | * creates a loop - SCSI EH issues door lock which | |
2388 | * fails and gets invoked again to acquire sense data | |
2389 | * for the failed command. | |
2390 | * | |
2391 | * If door lock fails, always clear sdev->locked to | |
2392 | * avoid this infinite loop. | |
2393 | */ | |
2394 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2395 | qc->dev->sdev->locked = 0; | |
2396 | ||
246619da TH |
2397 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2398 | qc->scsidone(cmd); | |
2399 | ata_qc_free(qc); | |
2400 | return; | |
2401 | } | |
2402 | ||
2403 | /* successful completion or old EH failure path */ | |
a7dac447 | 2404 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2405 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2406 | atapi_request_sense(qc); |
77853bf2 | 2407 | return; |
74e6c8c3 | 2408 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2409 | /* FIXME: not quite right; we don't want the |
2410 | * translation of taskfile registers into | |
2411 | * a sense descriptors, since that's only | |
2412 | * correct for ATA, not ATAPI | |
2413 | */ | |
750426aa | 2414 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2415 | } else { |
1da177e4 LT |
2416 | u8 *scsicmd = cmd->cmnd; |
2417 | ||
fd71da46 | 2418 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2419 | u8 *buf = NULL; |
2420 | unsigned int buflen; | |
2421 | ||
2422 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2423 | |
2424 | /* ATAPI devices typically report zero for their SCSI version, | |
2425 | * and sometimes deviate from the spec WRT response data | |
2426 | * format. If SCSI version is reported as zero like normal, | |
2427 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2428 | * to indicate to the Linux scsi midlayer this is a modern | |
2429 | * device. 2) Ensure response data format / ATAPI information | |
2430 | * are always correct. | |
a15dbeb4 JG |
2431 | */ |
2432 | if (buf[2] == 0) { | |
2433 | buf[2] = 0x5; | |
2434 | buf[3] = 0x32; | |
2435 | } | |
2436 | ||
1da177e4 LT |
2437 | ata_scsi_rbuf_put(cmd, buf); |
2438 | } | |
a15dbeb4 | 2439 | |
1da177e4 LT |
2440 | cmd->result = SAM_STAT_GOOD; |
2441 | } | |
2442 | ||
2443 | qc->scsidone(cmd); | |
77853bf2 | 2444 | ata_qc_free(qc); |
1da177e4 LT |
2445 | } |
2446 | /** | |
2447 | * atapi_xlat - Initialize PACKET taskfile | |
2448 | * @qc: command structure to be initialized | |
1da177e4 LT |
2449 | * |
2450 | * LOCKING: | |
cca3974e | 2451 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2452 | * |
2453 | * RETURNS: | |
2454 | * Zero on success, non-zero on failure. | |
2455 | */ | |
ad706991 | 2456 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2457 | { |
542b1444 | 2458 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 LT |
2459 | struct ata_device *dev = qc->dev; |
2460 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
542b1444 | 2461 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
2db78dd3 | 2462 | unsigned int nbytes; |
1da177e4 | 2463 | |
2e5704f6 TH |
2464 | memset(qc->cdb, 0, dev->cdb_len); |
2465 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2466 | |
2467 | qc->complete_fn = atapi_qc_complete; | |
2468 | ||
2469 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2470 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2471 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2472 | DPRINTK("direction: write\n"); | |
2473 | } | |
2474 | ||
2475 | qc->tf.command = ATA_CMD_PACKET; | |
7120165c | 2476 | qc->nbytes = scsi_bufflen(scmd); |
e00f1ff3 TH |
2477 | |
2478 | /* check whether ATAPI DMA is safe */ | |
2479 | if (!using_pio && ata_check_atapi_dma(qc)) | |
2480 | using_pio = 1; | |
1da177e4 | 2481 | |
2db78dd3 AC |
2482 | /* Some controller variants snoop this value for Packet transfers |
2483 | to do state machine and FIFO management. Thus we want to set it | |
2484 | properly, and for DMA where it is effectively meaningless */ | |
2485 | nbytes = min(qc->nbytes, (unsigned int)63 * 1024); | |
2486 | ||
2487 | qc->tf.lbam = (nbytes & 0xFF); | |
2488 | qc->tf.lbah = (nbytes >> 8); | |
2489 | ||
1da177e4 | 2490 | if (using_pio || nodata) { |
e00f1ff3 | 2491 | /* no data, or PIO data xfer */ |
1da177e4 LT |
2492 | if (nodata) |
2493 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2494 | else | |
2495 | qc->tf.protocol = ATA_PROT_ATAPI; | |
e00f1ff3 TH |
2496 | } else { |
2497 | /* DMA data xfer */ | |
1da177e4 LT |
2498 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; |
2499 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2500 | ||
542b1444 | 2501 | if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE)) |
95de719a | 2502 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2503 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2504 | } |
2505 | ||
2db78dd3 AC |
2506 | |
2507 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2508 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2509 | return 0; |
2510 | } | |
2511 | ||
2dcb407e | 2512 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2513 | { |
41bda9c9 TH |
2514 | if (ap->nr_pmp_links == 0) { |
2515 | if (likely(devno < ata_link_max_devices(&ap->link))) | |
2516 | return &ap->link.device[devno]; | |
2517 | } else { | |
2518 | if (likely(devno < ap->nr_pmp_links)) | |
2519 | return &ap->pmp_link[devno].device[0]; | |
2520 | } | |
2521 | ||
ab5b3a5b TH |
2522 | return NULL; |
2523 | } | |
2524 | ||
2dcb407e JG |
2525 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2526 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2527 | { |
41bda9c9 TH |
2528 | int devno; |
2529 | ||
ab5b3a5b | 2530 | /* skip commands not addressed to targets we simulate */ |
41bda9c9 TH |
2531 | if (ap->nr_pmp_links == 0) { |
2532 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2533 | return NULL; | |
2534 | devno = scsidev->id; | |
2535 | } else { | |
2536 | if (unlikely(scsidev->id || scsidev->lun)) | |
2537 | return NULL; | |
2538 | devno = scsidev->channel; | |
2539 | } | |
ab5b3a5b | 2540 | |
41bda9c9 | 2541 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2542 | } |
2543 | ||
99ba9e09 BK |
2544 | /** |
2545 | * ata_scsi_dev_enabled - determine if device is enabled | |
2546 | * @dev: ATA device | |
2547 | * | |
2548 | * Determine if commands should be sent to the specified device. | |
2549 | * | |
2550 | * LOCKING: | |
cca3974e | 2551 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2552 | * |
2553 | * RETURNS: | |
2554 | * 0 if commands are not allowed / 1 if commands are allowed | |
2555 | */ | |
2556 | ||
2557 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2558 | { | |
2559 | if (unlikely(!ata_dev_enabled(dev))) | |
2560 | return 0; | |
2561 | ||
9af5c9c9 | 2562 | if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) { |
99ba9e09 BK |
2563 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { |
2564 | ata_dev_printk(dev, KERN_WARNING, | |
2565 | "WARNING: ATAPI is %s, device ignored.\n", | |
2566 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2567 | return 0; | |
2568 | } | |
2569 | } | |
2570 | ||
2571 | return 1; | |
2572 | } | |
2573 | ||
1da177e4 LT |
2574 | /** |
2575 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2576 | * @ap: ATA port to which the device is attached | |
2577 | * @scsidev: SCSI device from which we derive the ATA device | |
2578 | * | |
2579 | * Given various information provided in struct scsi_cmnd, | |
2580 | * map that onto an ATA bus, and using that mapping | |
2581 | * determine which ata_device is associated with the | |
2582 | * SCSI command to be sent. | |
2583 | * | |
2584 | * LOCKING: | |
cca3974e | 2585 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2586 | * |
2587 | * RETURNS: | |
2588 | * Associated ATA device, or %NULL if not found. | |
2589 | */ | |
1da177e4 | 2590 | static struct ata_device * |
057ace5e | 2591 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2592 | { |
ab5b3a5b | 2593 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2594 | |
99ba9e09 | 2595 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2596 | return NULL; |
2597 | ||
1da177e4 LT |
2598 | return dev; |
2599 | } | |
2600 | ||
b095518e JG |
2601 | /* |
2602 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2603 | * @byte1: Byte 1 from pass-thru CDB. | |
2604 | * | |
2605 | * RETURNS: | |
2606 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2607 | */ | |
2608 | static u8 | |
2609 | ata_scsi_map_proto(u8 byte1) | |
2610 | { | |
2611 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2612 | case 3: /* Non-data */ |
2613 | return ATA_PROT_NODATA; | |
2614 | ||
2615 | case 6: /* DMA */ | |
2616 | case 10: /* UDMA Data-in */ | |
2617 | case 11: /* UDMA Data-Out */ | |
2618 | return ATA_PROT_DMA; | |
2619 | ||
2620 | case 4: /* PIO Data-in */ | |
2621 | case 5: /* PIO Data-out */ | |
2622 | return ATA_PROT_PIO; | |
2623 | ||
2624 | case 0: /* Hard Reset */ | |
2625 | case 1: /* SRST */ | |
2626 | case 8: /* Device Diagnostic */ | |
2627 | case 9: /* Device Reset */ | |
2628 | case 7: /* DMA Queued */ | |
2629 | case 12: /* FPDMA */ | |
2630 | case 15: /* Return Response Info */ | |
2631 | default: /* Reserved */ | |
2632 | break; | |
b095518e JG |
2633 | } |
2634 | ||
2635 | return ATA_PROT_UNKNOWN; | |
2636 | } | |
2637 | ||
2638 | /** | |
2639 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2640 | * @qc: command structure to be initialized | |
b095518e JG |
2641 | * |
2642 | * Handles either 12 or 16-byte versions of the CDB. | |
2643 | * | |
2644 | * RETURNS: | |
2645 | * Zero on success, non-zero on failure. | |
2646 | */ | |
ad706991 | 2647 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2648 | { |
2649 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2650 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2651 | struct ata_device *dev = qc->dev; |
ad706991 | 2652 | const u8 *cdb = scmd->cmnd; |
b095518e | 2653 | |
542b1444 | 2654 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2655 | goto invalid_fld; |
8190bdb9 | 2656 | |
f79d409f AC |
2657 | /* We may not issue DMA commands if no DMA mode is set */ |
2658 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2659 | goto invalid_fld; | |
b095518e JG |
2660 | |
2661 | /* | |
2662 | * 12 and 16 byte CDBs use different offsets to | |
2663 | * provide the various register values. | |
2664 | */ | |
542b1444 | 2665 | if (cdb[0] == ATA_16) { |
b095518e JG |
2666 | /* |
2667 | * 16-byte CDB - may contain extended commands. | |
2668 | * | |
2669 | * If that is the case, copy the upper byte register values. | |
2670 | */ | |
542b1444 TH |
2671 | if (cdb[1] & 0x01) { |
2672 | tf->hob_feature = cdb[3]; | |
2673 | tf->hob_nsect = cdb[5]; | |
2674 | tf->hob_lbal = cdb[7]; | |
2675 | tf->hob_lbam = cdb[9]; | |
2676 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2677 | tf->flags |= ATA_TFLAG_LBA48; |
2678 | } else | |
2679 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2680 | ||
2681 | /* | |
2682 | * Always copy low byte, device and command registers. | |
2683 | */ | |
542b1444 TH |
2684 | tf->feature = cdb[4]; |
2685 | tf->nsect = cdb[6]; | |
2686 | tf->lbal = cdb[8]; | |
2687 | tf->lbam = cdb[10]; | |
2688 | tf->lbah = cdb[12]; | |
2689 | tf->device = cdb[13]; | |
2690 | tf->command = cdb[14]; | |
b095518e JG |
2691 | } else { |
2692 | /* | |
2693 | * 12-byte CDB - incapable of extended commands. | |
2694 | */ | |
2695 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2696 | ||
542b1444 TH |
2697 | tf->feature = cdb[3]; |
2698 | tf->nsect = cdb[4]; | |
2699 | tf->lbal = cdb[5]; | |
2700 | tf->lbam = cdb[6]; | |
2701 | tf->lbah = cdb[7]; | |
2702 | tf->device = cdb[8]; | |
2703 | tf->command = cdb[9]; | |
b095518e | 2704 | } |
fa4453c4 AL |
2705 | |
2706 | /* enforce correct master/slave bit */ | |
2707 | tf->device = dev->devno ? | |
2708 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2709 | |
1dce589c AL |
2710 | /* sanity check for pio multi commands */ |
2711 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2712 | goto invalid_fld; | |
2713 | ||
2714 | if (is_multi_taskfile(tf)) { | |
2715 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2716 | ||
2717 | /* compare the passed through multi_count | |
2718 | * with the cached multi_count of libata | |
2719 | */ | |
2720 | if (multi_count != dev->multi_count) | |
2721 | ata_dev_printk(dev, KERN_WARNING, | |
2722 | "invalid multi_count %u ignored\n", | |
2723 | multi_count); | |
d26fc955 | 2724 | } |
1dce589c | 2725 | |
5a5dbd18 ML |
2726 | /* READ/WRITE LONG use a non-standard sect_size */ |
2727 | qc->sect_size = ATA_SECT_SIZE; | |
2728 | switch (tf->command) { | |
2729 | case ATA_CMD_READ_LONG: | |
2730 | case ATA_CMD_READ_LONG_ONCE: | |
2731 | case ATA_CMD_WRITE_LONG: | |
2732 | case ATA_CMD_WRITE_LONG_ONCE: | |
2733 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2734 | goto invalid_fld; | |
7120165c | 2735 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2736 | } |
2737 | ||
b095518e JG |
2738 | /* |
2739 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2740 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2741 | * by an update to hardware-specific registers for each | |
2742 | * controller (i.e. the reason for ->set_piomode(), | |
2743 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2744 | */ | |
2745 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2746 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2747 | goto invalid_fld; |
b095518e JG |
2748 | |
2749 | /* | |
2750 | * Set flags so that all registers will be written, | |
2751 | * and pass on write indication (used for PIO/DMA | |
2752 | * setup.) | |
2753 | */ | |
2754 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2755 | ||
542b1444 | 2756 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2757 | tf->flags |= ATA_TFLAG_WRITE; |
2758 | ||
2759 | /* | |
2760 | * Set transfer length. | |
2761 | * | |
2762 | * TODO: find out if we need to do more here to | |
2763 | * cover scatter/gather case. | |
2764 | */ | |
7120165c | 2765 | qc->nbytes = scsi_bufflen(scmd); |
b095518e | 2766 | |
e61e0672 TH |
2767 | /* request result TF */ |
2768 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2769 | ||
b095518e | 2770 | return 0; |
9a405257 TH |
2771 | |
2772 | invalid_fld: | |
542b1444 | 2773 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2774 | /* "Invalid field in cdb" */ |
2775 | return 1; | |
b095518e JG |
2776 | } |
2777 | ||
1da177e4 LT |
2778 | /** |
2779 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2780 | * @dev: ATA device | |
2781 | * @cmd: SCSI command opcode to consider | |
2782 | * | |
2783 | * Look up the SCSI command given, and determine whether the | |
2784 | * SCSI command is to be translated or simulated. | |
2785 | * | |
2786 | * RETURNS: | |
2787 | * Pointer to translation function if possible, %NULL if not. | |
2788 | */ | |
2789 | ||
2790 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2791 | { | |
2792 | switch (cmd) { | |
2793 | case READ_6: | |
2794 | case READ_10: | |
2795 | case READ_16: | |
2796 | ||
2797 | case WRITE_6: | |
2798 | case WRITE_10: | |
2799 | case WRITE_16: | |
2800 | return ata_scsi_rw_xlat; | |
2801 | ||
2802 | case SYNCHRONIZE_CACHE: | |
2803 | if (ata_try_flush_cache(dev)) | |
2804 | return ata_scsi_flush_xlat; | |
2805 | break; | |
2806 | ||
2807 | case VERIFY: | |
2808 | case VERIFY_16: | |
2809 | return ata_scsi_verify_xlat; | |
b095518e JG |
2810 | |
2811 | case ATA_12: | |
2812 | case ATA_16: | |
2813 | return ata_scsi_pass_thru; | |
da61396d | 2814 | |
972dcafb DG |
2815 | case START_STOP: |
2816 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2817 | } |
2818 | ||
2819 | return NULL; | |
2820 | } | |
2821 | ||
2822 | /** | |
2823 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2824 | * @ap: ATA port to which the command was being sent | |
2825 | * @cmd: SCSI command to dump | |
2826 | * | |
2827 | * Prints the contents of a SCSI command via printk(). | |
2828 | */ | |
2829 | ||
2830 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2831 | struct scsi_cmnd *cmd) | |
2832 | { | |
2833 | #ifdef ATA_DEBUG | |
2834 | struct scsi_device *scsidev = cmd->device; | |
2835 | u8 *scsicmd = cmd->cmnd; | |
2836 | ||
2837 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 2838 | ap->print_id, |
1da177e4 LT |
2839 | scsidev->channel, scsidev->id, scsidev->lun, |
2840 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2841 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2842 | scsicmd[8]); | |
2843 | #endif | |
2844 | } | |
2845 | ||
542b1444 | 2846 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2847 | void (*done)(struct scsi_cmnd *), |
2848 | struct ata_device *dev) | |
eb3f0f9c | 2849 | { |
baf4fdfa ML |
2850 | u8 scsi_op = scmd->cmnd[0]; |
2851 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
2852 | int rc = 0; |
2853 | ||
eb3f0f9c | 2854 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
2855 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
2856 | goto bad_cdb_len; | |
eb3f0f9c | 2857 | |
baf4fdfa ML |
2858 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
2859 | } else { | |
2860 | if (unlikely(!scmd->cmd_len)) | |
2861 | goto bad_cdb_len; | |
2862 | ||
2863 | xlat_func = NULL; | |
2864 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
2865 | /* relay SCSI command to ATAPI device */ | |
2866 | if (unlikely(scmd->cmd_len > dev->cdb_len)) | |
2867 | goto bad_cdb_len; | |
2868 | ||
2869 | xlat_func = atapi_xlat; | |
2870 | } else { | |
2871 | /* ATA_16 passthru, treat as an ATA command */ | |
2872 | if (unlikely(scmd->cmd_len > 16)) | |
2873 | goto bad_cdb_len; | |
2874 | ||
2875 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
2876 | } | |
2877 | } | |
2878 | ||
2879 | if (xlat_func) | |
2880 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
2881 | else | |
2882 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
2883 | |
2884 | return rc; | |
baf4fdfa ML |
2885 | |
2886 | bad_cdb_len: | |
2887 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
2888 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
2889 | scmd->result = DID_ERROR << 16; | |
2890 | done(scmd); | |
2891 | return 0; | |
eb3f0f9c BK |
2892 | } |
2893 | ||
1da177e4 LT |
2894 | /** |
2895 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2896 | * @cmd: SCSI command to be sent | |
2897 | * @done: Completion function, called when command is complete | |
2898 | * | |
2899 | * In some cases, this function translates SCSI commands into | |
2900 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2901 | * hardware. In other cases, this function simulates a | |
2902 | * SCSI device by evaluating and responding to certain | |
2903 | * SCSI commands. This creates the overall effect of | |
2904 | * ATA and ATAPI devices appearing as SCSI devices. | |
2905 | * | |
2906 | * LOCKING: | |
cca3974e | 2907 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
2908 | * |
2909 | * RETURNS: | |
2115ea94 TH |
2910 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
2911 | * 0 otherwise. | |
1da177e4 | 2912 | */ |
1da177e4 LT |
2913 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
2914 | { | |
2915 | struct ata_port *ap; | |
2916 | struct ata_device *dev; | |
2917 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 2918 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 2919 | int rc = 0; |
1da177e4 | 2920 | |
35bb94b1 | 2921 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
2922 | |
2923 | spin_unlock(shost->host_lock); | |
ba6a1308 | 2924 | spin_lock(ap->lock); |
1da177e4 LT |
2925 | |
2926 | ata_scsi_dump_cdb(ap, cmd); | |
2927 | ||
2928 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 2929 | if (likely(dev)) |
2115ea94 | 2930 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 2931 | else { |
1da177e4 LT |
2932 | cmd->result = (DID_BAD_TARGET << 16); |
2933 | done(cmd); | |
1da177e4 LT |
2934 | } |
2935 | ||
ba6a1308 | 2936 | spin_unlock(ap->lock); |
005a5a06 | 2937 | spin_lock(shost->host_lock); |
2115ea94 | 2938 | return rc; |
1da177e4 LT |
2939 | } |
2940 | ||
2941 | /** | |
2942 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 2943 | * @dev: the target device |
1da177e4 LT |
2944 | * @cmd: SCSI command being sent to device. |
2945 | * @done: SCSI command completion function. | |
2946 | * | |
2947 | * Interprets and directly executes a select list of SCSI commands | |
2948 | * that can be handled internally. | |
2949 | * | |
2950 | * LOCKING: | |
cca3974e | 2951 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2952 | */ |
2953 | ||
3373efd8 | 2954 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
2955 | void (*done)(struct scsi_cmnd *)) |
2956 | { | |
2957 | struct ata_scsi_args args; | |
057ace5e | 2958 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 2959 | u8 tmp8; |
1da177e4 | 2960 | |
9a3dccc4 TH |
2961 | args.dev = dev; |
2962 | args.id = dev->id; | |
1da177e4 LT |
2963 | args.cmd = cmd; |
2964 | args.done = done; | |
2965 | ||
2966 | switch(scsicmd[0]) { | |
2dcb407e JG |
2967 | /* TODO: worth improving? */ |
2968 | case FORMAT_UNIT: | |
2969 | ata_scsi_invalid_field(cmd, done); | |
2970 | break; | |
2971 | ||
2972 | case INQUIRY: | |
2973 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 2974 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
2975 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2976 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2977 | else switch (scsicmd[2]) { | |
2978 | case 0x00: | |
2979 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 2980 | break; |
2dcb407e JG |
2981 | case 0x80: |
2982 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 2983 | break; |
2dcb407e JG |
2984 | case 0x83: |
2985 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 2986 | break; |
2dcb407e JG |
2987 | case 0x89: |
2988 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
2989 | break; | |
2990 | default: | |
ae006510 | 2991 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 2992 | break; |
2dcb407e JG |
2993 | } |
2994 | break; | |
2995 | ||
2996 | case MODE_SENSE: | |
2997 | case MODE_SENSE_10: | |
2998 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2999 | break; | |
3000 | ||
3001 | case MODE_SELECT: /* unconditionally return */ | |
3002 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3003 | ata_scsi_invalid_field(cmd, done); | |
3004 | break; | |
1da177e4 | 3005 | |
2dcb407e JG |
3006 | case READ_CAPACITY: |
3007 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3008 | break; | |
3009 | ||
3010 | case SERVICE_ACTION_IN: | |
3011 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3012 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3013 | else |
3014 | ata_scsi_invalid_field(cmd, done); | |
3015 | break; | |
1da177e4 | 3016 | |
2dcb407e JG |
3017 | case REPORT_LUNS: |
3018 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3019 | break; | |
1da177e4 | 3020 | |
2dcb407e JG |
3021 | case REQUEST_SENSE: |
3022 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3023 | cmd->result = (DRIVER_SENSE << 24); | |
3024 | done(cmd); | |
3025 | break; | |
1da177e4 | 3026 | |
2dcb407e JG |
3027 | /* if we reach this, then writeback caching is disabled, |
3028 | * turning this into a no-op. | |
3029 | */ | |
3030 | case SYNCHRONIZE_CACHE: | |
3031 | /* fall through */ | |
3032 | ||
3033 | /* no-op's, complete with success */ | |
3034 | case REZERO_UNIT: | |
3035 | case SEEK_6: | |
3036 | case SEEK_10: | |
3037 | case TEST_UNIT_READY: | |
3038 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3039 | break; | |
45394145 | 3040 | |
2dcb407e JG |
3041 | case SEND_DIAGNOSTIC: |
3042 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3043 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3044 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3045 | else |
3046 | ata_scsi_invalid_field(cmd, done); | |
3047 | break; | |
1da177e4 | 3048 | |
2dcb407e JG |
3049 | /* all other commands */ |
3050 | default: | |
3051 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3052 | /* "Invalid command operation code" */ | |
3053 | done(cmd); | |
3054 | break; | |
1da177e4 LT |
3055 | } |
3056 | } | |
3057 | ||
f3187195 TH |
3058 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3059 | { | |
3060 | int i, rc; | |
3061 | ||
3062 | for (i = 0; i < host->n_ports; i++) { | |
3063 | struct ata_port *ap = host->ports[i]; | |
3064 | struct Scsi_Host *shost; | |
3065 | ||
3066 | rc = -ENOMEM; | |
3067 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3068 | if (!shost) | |
3069 | goto err_alloc; | |
3070 | ||
3071 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3072 | ap->scsi_host = shost; | |
3073 | ||
3074 | shost->transportt = &ata_scsi_transport_template; | |
3075 | shost->unique_id = ap->print_id; | |
3076 | shost->max_id = 16; | |
3077 | shost->max_lun = 1; | |
3078 | shost->max_channel = 1; | |
3079 | shost->max_cmd_len = 16; | |
3080 | ||
31cc23b3 TH |
3081 | /* Schedule policy is determined by ->qc_defer() |
3082 | * callback and it needs to see every deferred qc. | |
3083 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3084 | * automatically deferring requests. | |
3085 | */ | |
3086 | shost->max_host_blocked = 1; | |
3087 | ||
f3187195 TH |
3088 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3089 | if (rc) | |
3090 | goto err_add; | |
3091 | } | |
3092 | ||
3093 | return 0; | |
3094 | ||
3095 | err_add: | |
3096 | scsi_host_put(host->ports[i]->scsi_host); | |
3097 | err_alloc: | |
3098 | while (--i >= 0) { | |
3099 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3100 | ||
3101 | scsi_remove_host(shost); | |
3102 | scsi_host_put(shost); | |
3103 | } | |
3104 | return rc; | |
3105 | } | |
3106 | ||
1ae46317 | 3107 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3108 | { |
1ae46317 TH |
3109 | int tries = 5; |
3110 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3111 | struct ata_link *link; |
1ae46317 | 3112 | struct ata_device *dev; |
644dd0cc | 3113 | |
198e0fed | 3114 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3115 | return; |
3116 | ||
1ae46317 | 3117 | repeat: |
41bda9c9 TH |
3118 | ata_port_for_each_link(link, ap) { |
3119 | ata_link_for_each_dev(dev, link) { | |
3120 | struct scsi_device *sdev; | |
3121 | int channel = 0, id = 0; | |
3edebac4 | 3122 | |
41bda9c9 TH |
3123 | if (!ata_dev_enabled(dev) || dev->sdev) |
3124 | continue; | |
3f19ee8c | 3125 | |
41bda9c9 TH |
3126 | if (ata_is_host_link(link)) |
3127 | id = dev->devno; | |
3128 | else | |
3129 | channel = link->pmp; | |
3130 | ||
3131 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3132 | NULL); | |
3133 | if (!IS_ERR(sdev)) { | |
3134 | dev->sdev = sdev; | |
3135 | scsi_device_put(sdev); | |
3136 | } | |
3edebac4 | 3137 | } |
3f19ee8c | 3138 | } |
1ae46317 TH |
3139 | |
3140 | /* If we scanned while EH was in progress or allocation | |
3141 | * failure occurred, scan would have failed silently. Check | |
3142 | * whether all devices are attached. | |
3143 | */ | |
41bda9c9 TH |
3144 | ata_port_for_each_link(link, ap) { |
3145 | ata_link_for_each_dev(dev, link) { | |
3146 | if (ata_dev_enabled(dev) && !dev->sdev) | |
3147 | goto exit_loop; | |
3148 | } | |
1ae46317 | 3149 | } |
41bda9c9 TH |
3150 | exit_loop: |
3151 | if (!link) | |
1ae46317 TH |
3152 | return; |
3153 | ||
3154 | /* we're missing some SCSI devices */ | |
3155 | if (sync) { | |
3156 | /* If caller requested synchrnous scan && we've made | |
3157 | * any progress, sleep briefly and repeat. | |
3158 | */ | |
3159 | if (dev != last_failed_dev) { | |
3160 | msleep(100); | |
3161 | last_failed_dev = dev; | |
3162 | goto repeat; | |
3163 | } | |
3164 | ||
3165 | /* We might be failing to detect boot device, give it | |
3166 | * a few more chances. | |
3167 | */ | |
3168 | if (--tries) { | |
3169 | msleep(100); | |
3170 | goto repeat; | |
3171 | } | |
3172 | ||
3173 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3174 | "failed without making any progress,\n" | |
3175 | " switching to async\n"); | |
3176 | } | |
3177 | ||
3178 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3179 | round_jiffies_relative(HZ)); | |
644dd0cc | 3180 | } |
0ea035a3 TH |
3181 | |
3182 | /** | |
3183 | * ata_scsi_offline_dev - offline attached SCSI device | |
3184 | * @dev: ATA device to offline attached SCSI device for | |
3185 | * | |
3186 | * This function is called from ata_eh_hotplug() and responsible | |
3187 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3188 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3189 | * against clearing. |
3190 | * | |
3191 | * LOCKING: | |
cca3974e | 3192 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3193 | * |
3194 | * RETURNS: | |
3195 | * 1 if attached SCSI device exists, 0 otherwise. | |
3196 | */ | |
3197 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3198 | { | |
3199 | if (dev->sdev) { | |
3200 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3201 | return 1; | |
3202 | } | |
3203 | return 0; | |
3204 | } | |
580b2102 TH |
3205 | |
3206 | /** | |
3207 | * ata_scsi_remove_dev - remove attached SCSI device | |
3208 | * @dev: ATA device to remove attached SCSI device for | |
3209 | * | |
3210 | * This function is called from ata_eh_scsi_hotplug() and | |
3211 | * responsible for removing the SCSI device attached to @dev. | |
3212 | * | |
3213 | * LOCKING: | |
3214 | * Kernel thread context (may sleep). | |
3215 | */ | |
3216 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3217 | { | |
9af5c9c9 | 3218 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3219 | struct scsi_device *sdev; |
3220 | unsigned long flags; | |
3221 | ||
3222 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3223 | * state doesn't change underneath us and thus | |
3224 | * scsi_device_get() always succeeds. The mutex locking can | |
3225 | * be removed if there is __scsi_device_get() interface which | |
3226 | * increments reference counts regardless of device state. | |
3227 | */ | |
cca3974e | 3228 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3229 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3230 | |
cca3974e | 3231 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3232 | sdev = dev->sdev; |
3233 | dev->sdev = NULL; | |
3234 | ||
3235 | if (sdev) { | |
3236 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3237 | * away underneath us after the host lock and |
580b2102 TH |
3238 | * scan_mutex are released. Hold onto it. |
3239 | */ | |
3240 | if (scsi_device_get(sdev) == 0) { | |
3241 | /* The following ensures the attached sdev is | |
3242 | * offline on return from ata_scsi_offline_dev() | |
3243 | * regardless it wins or loses the race | |
3244 | * against this function. | |
3245 | */ | |
3246 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3247 | } else { | |
3248 | WARN_ON(1); | |
3249 | sdev = NULL; | |
3250 | } | |
3251 | } | |
3252 | ||
ba6a1308 | 3253 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3254 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3255 | |
3256 | if (sdev) { | |
3257 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3258 | sdev->sdev_gendev.bus_id); | |
3259 | ||
3260 | scsi_remove_device(sdev); | |
3261 | scsi_device_put(sdev); | |
3262 | } | |
3263 | } | |
3264 | ||
41bda9c9 TH |
3265 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3266 | { | |
3267 | struct ata_port *ap = link->ap; | |
3268 | struct ata_device *dev; | |
3269 | ||
3270 | ata_link_for_each_dev(dev, link) { | |
3271 | unsigned long flags; | |
3272 | ||
3273 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3274 | continue; | |
3275 | ||
3276 | spin_lock_irqsave(ap->lock, flags); | |
3277 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3278 | spin_unlock_irqrestore(ap->lock, flags); | |
3279 | ||
3280 | ata_scsi_remove_dev(dev); | |
3281 | } | |
3282 | } | |
3283 | ||
2f294968 KCA |
3284 | /** |
3285 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3286 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3287 | * |
3288 | * Tell the block layer to send a media change notification | |
3289 | * event. | |
3290 | * | |
3291 | * LOCKING: | |
854c73a2 | 3292 | * spin_lock_irqsave(host lock) |
2f294968 | 3293 | */ |
854c73a2 | 3294 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 KCA |
3295 | { |
3296 | #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED | |
854c73a2 TH |
3297 | if (dev->sdev) |
3298 | scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE); | |
2f294968 KCA |
3299 | #endif |
3300 | } | |
2f294968 | 3301 | |
580b2102 TH |
3302 | /** |
3303 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3304 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3305 | * |
3306 | * Perform SCSI part of hotplug. It's executed from a separate | |
3307 | * workqueue after EH completes. This is necessary because SCSI | |
3308 | * hot plugging requires working EH and hot unplugging is | |
3309 | * synchronized with hot plugging with a mutex. | |
3310 | * | |
3311 | * LOCKING: | |
3312 | * Kernel thread context (may sleep). | |
3313 | */ | |
65f27f38 | 3314 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3315 | { |
65f27f38 DH |
3316 | struct ata_port *ap = |
3317 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3318 | int i; |
580b2102 | 3319 | |
b51e9e5d | 3320 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3321 | DPRINTK("ENTER/EXIT - unloading\n"); |
3322 | return; | |
3323 | } | |
3324 | ||
3325 | DPRINTK("ENTER\n"); | |
3326 | ||
41bda9c9 TH |
3327 | /* Unplug detached devices. We cannot use link iterator here |
3328 | * because PMP links have to be scanned even if PMP is | |
3329 | * currently not attached. Iterate manually. | |
3330 | */ | |
3331 | ata_scsi_handle_link_detach(&ap->link); | |
3332 | if (ap->pmp_link) | |
3333 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3334 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3335 | |
3336 | /* scan for new ones */ | |
1ae46317 | 3337 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3338 | |
3339 | DPRINTK("EXIT\n"); | |
3340 | } | |
83c47bcb TH |
3341 | |
3342 | /** | |
3343 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3344 | * @shost: SCSI host to scan | |
3345 | * @channel: Channel to scan | |
3346 | * @id: ID to scan | |
3347 | * @lun: LUN to scan | |
3348 | * | |
3349 | * This function is called when user explicitly requests bus | |
3350 | * scan. Set probe pending flag and invoke EH. | |
3351 | * | |
3352 | * LOCKING: | |
3353 | * SCSI layer (we don't care) | |
3354 | * | |
3355 | * RETURNS: | |
3356 | * Zero. | |
3357 | */ | |
3358 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3359 | unsigned int id, unsigned int lun) | |
3360 | { | |
3361 | struct ata_port *ap = ata_shost_to_port(shost); | |
3362 | unsigned long flags; | |
41bda9c9 | 3363 | int devno, rc = 0; |
83c47bcb TH |
3364 | |
3365 | if (!ap->ops->error_handler) | |
3366 | return -EOPNOTSUPP; | |
3367 | ||
41bda9c9 | 3368 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3369 | return -EINVAL; |
3370 | ||
41bda9c9 TH |
3371 | if (ap->nr_pmp_links == 0) { |
3372 | if (channel != SCAN_WILD_CARD && channel) | |
3373 | return -EINVAL; | |
3374 | devno = id; | |
3375 | } else { | |
3376 | if (id != SCAN_WILD_CARD && id) | |
3377 | return -EINVAL; | |
3378 | devno = channel; | |
3379 | } | |
3380 | ||
ba6a1308 | 3381 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3382 | |
41bda9c9 TH |
3383 | if (devno == SCAN_WILD_CARD) { |
3384 | struct ata_link *link; | |
3385 | ||
3386 | ata_port_for_each_link(link, ap) { | |
3387 | struct ata_eh_info *ehi = &link->eh_info; | |
3388 | ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1; | |
3389 | ehi->action |= ATA_EH_SOFTRESET; | |
3390 | } | |
83c47bcb | 3391 | } else { |
41bda9c9 | 3392 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3393 | |
3394 | if (dev) { | |
41bda9c9 | 3395 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 TH |
3396 | ehi->probe_mask |= 1 << dev->devno; |
3397 | ehi->action |= ATA_EH_SOFTRESET; | |
3398 | ehi->flags |= ATA_EHI_RESUME_LINK; | |
83c47bcb TH |
3399 | } else |
3400 | rc = -EINVAL; | |
3401 | } | |
3402 | ||
309afcb5 | 3403 | if (rc == 0) { |
83c47bcb | 3404 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3405 | spin_unlock_irqrestore(ap->lock, flags); |
3406 | ata_port_wait_eh(ap); | |
3407 | } else | |
3408 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3409 | |
3410 | return rc; | |
3411 | } | |
3057ac3c | 3412 | |
3413 | /** | |
d0171269 | 3414 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3415 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3416 | * |
d0171269 TH |
3417 | * After ATA pass thru (SAT) commands are executed successfully, |
3418 | * libata need to propagate the changes to SCSI layer. This | |
3419 | * function must be executed from ata_aux_wq such that sdev | |
3420 | * attach/detach don't race with rescan. | |
3057ac3c | 3421 | * |
d0171269 TH |
3422 | * LOCKING: |
3423 | * Kernel thread context (may sleep). | |
3057ac3c | 3424 | */ |
65f27f38 | 3425 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3426 | { |
65f27f38 DH |
3427 | struct ata_port *ap = |
3428 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3429 | struct ata_link *link; |
f58229f8 | 3430 | struct ata_device *dev; |
f84e7e41 | 3431 | unsigned long flags; |
3057ac3c | 3432 | |
f84e7e41 TH |
3433 | spin_lock_irqsave(ap->lock, flags); |
3434 | ||
41bda9c9 TH |
3435 | ata_port_for_each_link(link, ap) { |
3436 | ata_link_for_each_dev(dev, link) { | |
3437 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3438 | |
41bda9c9 TH |
3439 | if (!ata_dev_enabled(dev) || !sdev) |
3440 | continue; | |
3441 | if (scsi_device_get(sdev)) | |
3442 | continue; | |
f84e7e41 | 3443 | |
41bda9c9 TH |
3444 | spin_unlock_irqrestore(ap->lock, flags); |
3445 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3446 | scsi_device_put(sdev); | |
3447 | spin_lock_irqsave(ap->lock, flags); | |
3448 | } | |
3057ac3c | 3449 | } |
f84e7e41 TH |
3450 | |
3451 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3452 | } |
80289167 BK |
3453 | |
3454 | /** | |
3455 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3456 | * @host: ATA host container for all SAS ports |
80289167 | 3457 | * @port_info: Information from low-level host driver |
cca3974e | 3458 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3459 | * |
3460 | * LOCKING: | |
3461 | * PCI/etc. bus probe sem. | |
3462 | * | |
3463 | * RETURNS: | |
3464 | * ata_port pointer on success / NULL on failure. | |
3465 | */ | |
3466 | ||
cca3974e | 3467 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3468 | struct ata_port_info *port_info, |
cca3974e | 3469 | struct Scsi_Host *shost) |
80289167 | 3470 | { |
f3187195 | 3471 | struct ata_port *ap; |
80289167 | 3472 | |
f3187195 | 3473 | ap = ata_port_alloc(host); |
80289167 BK |
3474 | if (!ap) |
3475 | return NULL; | |
3476 | ||
f3187195 | 3477 | ap->port_no = 0; |
cca3974e | 3478 | ap->lock = shost->host_lock; |
f3187195 TH |
3479 | ap->pio_mask = port_info->pio_mask; |
3480 | ap->mwdma_mask = port_info->mwdma_mask; | |
3481 | ap->udma_mask = port_info->udma_mask; | |
3482 | ap->flags |= port_info->flags; | |
3483 | ap->ops = port_info->port_ops; | |
3484 | ap->cbl = ATA_CBL_SATA; | |
3485 | ||
80289167 BK |
3486 | return ap; |
3487 | } | |
3488 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3489 | ||
3490 | /** | |
3491 | * ata_sas_port_start - Set port up for dma. | |
3492 | * @ap: Port to initialize | |
3493 | * | |
3494 | * Called just after data structures for each port are | |
3495 | * initialized. Allocates DMA pad. | |
3496 | * | |
3497 | * May be used as the port_start() entry in ata_port_operations. | |
3498 | * | |
3499 | * LOCKING: | |
3500 | * Inherited from caller. | |
3501 | */ | |
3502 | int ata_sas_port_start(struct ata_port *ap) | |
3503 | { | |
3504 | return ata_pad_alloc(ap, ap->dev); | |
3505 | } | |
3506 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3507 | ||
3508 | /** | |
3509 | * ata_port_stop - Undo ata_sas_port_start() | |
3510 | * @ap: Port to shut down | |
3511 | * | |
3512 | * Frees the DMA pad. | |
3513 | * | |
3514 | * May be used as the port_stop() entry in ata_port_operations. | |
3515 | * | |
3516 | * LOCKING: | |
3517 | * Inherited from caller. | |
3518 | */ | |
3519 | ||
3520 | void ata_sas_port_stop(struct ata_port *ap) | |
3521 | { | |
3522 | ata_pad_free(ap, ap->dev); | |
3523 | } | |
3524 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3525 | ||
3526 | /** | |
3527 | * ata_sas_port_init - Initialize a SATA device | |
3528 | * @ap: SATA port to initialize | |
3529 | * | |
3530 | * LOCKING: | |
3531 | * PCI/etc. bus probe sem. | |
3532 | * | |
3533 | * RETURNS: | |
3534 | * Zero on success, non-zero on error. | |
3535 | */ | |
3536 | ||
3537 | int ata_sas_port_init(struct ata_port *ap) | |
3538 | { | |
3539 | int rc = ap->ops->port_start(ap); | |
3540 | ||
f3187195 TH |
3541 | if (!rc) { |
3542 | ap->print_id = ata_print_id++; | |
80289167 | 3543 | rc = ata_bus_probe(ap); |
f3187195 | 3544 | } |
80289167 BK |
3545 | |
3546 | return rc; | |
3547 | } | |
3548 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3549 | ||
3550 | /** | |
3551 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3552 | * @ap: SATA port to destroy | |
3553 | * | |
3554 | */ | |
3555 | ||
3556 | void ata_sas_port_destroy(struct ata_port *ap) | |
3557 | { | |
f0d36efd TH |
3558 | if (ap->ops->port_stop) |
3559 | ap->ops->port_stop(ap); | |
80289167 BK |
3560 | kfree(ap); |
3561 | } | |
3562 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3563 | ||
3564 | /** | |
3565 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3566 | * @sdev: SCSI device to configure | |
3567 | * @ap: ATA port to which SCSI device is attached | |
3568 | * | |
3569 | * RETURNS: | |
3570 | * Zero. | |
3571 | */ | |
3572 | ||
3573 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3574 | { | |
3575 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3576 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3577 | return 0; |
3578 | } | |
3579 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3580 | ||
3581 | /** | |
3582 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3583 | * @cmd: SCSI command to be sent | |
3584 | * @done: Completion function, called when command is complete | |
3585 | * @ap: ATA port to which the command is being sent | |
3586 | * | |
3587 | * RETURNS: | |
08475a19 BK |
3588 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3589 | * 0 otherwise. | |
80289167 BK |
3590 | */ |
3591 | ||
3592 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3593 | struct ata_port *ap) | |
3594 | { | |
08475a19 BK |
3595 | int rc = 0; |
3596 | ||
80289167 BK |
3597 | ata_scsi_dump_cdb(ap, cmd); |
3598 | ||
9af5c9c9 TH |
3599 | if (likely(ata_scsi_dev_enabled(ap->link.device))) |
3600 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); | |
80289167 BK |
3601 | else { |
3602 | cmd->result = (DID_BAD_TARGET << 16); | |
3603 | done(cmd); | |
3604 | } | |
08475a19 | 3605 | return rc; |
80289167 BK |
3606 | } |
3607 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |