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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 | ||
a2d6ed14 | 123 | static const char *ata_scsi_lpm_get(enum link_pm policy) |
ca77329f KCA |
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 | ||
ff2aeb1e | 520 | qc->sg = scsi_sglist(cmd); |
7120165c | 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 | ||
fa2fc7f4 JB |
829 | /** |
830 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 831 | * @rq: request to be checked |
fa2fc7f4 JB |
832 | * |
833 | * ATAPI commands which transfer variable length data to host | |
834 | * might overflow due to application error or hardare bug. This | |
835 | * function checks whether overflow should be drained and ignored | |
836 | * for @request. | |
837 | * | |
838 | * LOCKING: | |
839 | * None. | |
840 | * | |
841 | * RETURNS: | |
842 | * 1 if ; otherwise, 0. | |
843 | */ | |
844 | static int atapi_drain_needed(struct request *rq) | |
845 | { | |
846 | if (likely(!blk_pc_request(rq))) | |
847 | return 0; | |
848 | ||
849 | if (!rq->data_len || (rq->cmd_flags & REQ_RW)) | |
850 | return 0; | |
851 | ||
852 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
853 | } | |
854 | ||
855 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
856 | struct ata_device *dev) | |
a6cce2a7 | 857 | { |
914ed354 TH |
858 | /* configure max sectors */ |
859 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 860 | |
fa2fc7f4 JB |
861 | if (dev->class == ATA_DEV_ATAPI) { |
862 | struct request_queue *q = sdev->request_queue; | |
863 | void *buf; | |
864 | ||
e3790c7d | 865 | /* set the min alignment and padding */ |
d0ad3bc9 JB |
866 | blk_queue_update_dma_alignment(sdev->request_queue, |
867 | ATA_DMA_PAD_SZ - 1); | |
e3790c7d | 868 | blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1); |
fa2fc7f4 JB |
869 | |
870 | /* configure draining */ | |
871 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
872 | if (!buf) { | |
873 | ata_dev_printk(dev, KERN_ERR, | |
874 | "drain buffer allocation failed\n"); | |
875 | return -ENOMEM; | |
876 | } | |
877 | ||
878 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
879 | } else { | |
d0ad3bc9 JB |
880 | /* ATA devices must be sector aligned */ |
881 | blk_queue_update_dma_alignment(sdev->request_queue, | |
882 | ATA_SECT_SIZE - 1); | |
d8cf5389 | 883 | sdev->manage_start_stop = 1; |
dde20207 | 884 | } |
d8cf5389 | 885 | |
f26792d5 JG |
886 | if (dev->flags & ATA_DFLAG_AN) |
887 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
888 | ||
a6e6ce8e TH |
889 | if (dev->flags & ATA_DFLAG_NCQ) { |
890 | int depth; | |
891 | ||
892 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
893 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
894 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
895 | } | |
fa2fc7f4 JB |
896 | |
897 | return 0; | |
a6cce2a7 BK |
898 | } |
899 | ||
1da177e4 LT |
900 | /** |
901 | * ata_scsi_slave_config - Set SCSI device attributes | |
902 | * @sdev: SCSI device to examine | |
903 | * | |
904 | * This is called before we actually start reading | |
905 | * and writing to the device, to configure certain | |
906 | * SCSI mid-layer behaviors. | |
907 | * | |
908 | * LOCKING: | |
909 | * Defined by SCSI layer. We don't really care. | |
910 | */ | |
911 | ||
912 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
913 | { | |
31534363 TH |
914 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
915 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 916 | int rc = 0; |
31534363 | 917 | |
a6cce2a7 | 918 | ata_scsi_sdev_config(sdev); |
1da177e4 | 919 | |
31534363 | 920 | if (dev) |
fa2fc7f4 | 921 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 922 | |
fa2fc7f4 | 923 | return rc; |
1da177e4 LT |
924 | } |
925 | ||
83c47bcb TH |
926 | /** |
927 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
928 | * @sdev: SCSI device to be destroyed | |
929 | * | |
930 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
931 | * this unplugging was initiated by libata as indicated by NULL | |
932 | * dev->sdev, this function doesn't have to do anything. | |
933 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
934 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
935 | * EH. | |
936 | * | |
937 | * LOCKING: | |
938 | * Defined by SCSI layer. We don't really care. | |
939 | */ | |
940 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
941 | { | |
942 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 943 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
944 | unsigned long flags; |
945 | struct ata_device *dev; | |
946 | ||
947 | if (!ap->ops->error_handler) | |
948 | return; | |
949 | ||
ba6a1308 | 950 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
951 | dev = __ata_scsi_find_dev(ap, sdev); |
952 | if (dev && dev->sdev) { | |
953 | /* SCSI device already in CANCEL state, no need to offline it */ | |
954 | dev->sdev = NULL; | |
955 | dev->flags |= ATA_DFLAG_DETACH; | |
956 | ata_port_schedule_eh(ap); | |
957 | } | |
ba6a1308 | 958 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
959 | |
960 | kfree(q->dma_drain_buffer); | |
961 | q->dma_drain_buffer = NULL; | |
962 | q->dma_drain_size = 0; | |
83c47bcb TH |
963 | } |
964 | ||
a6e6ce8e TH |
965 | /** |
966 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
967 | * @sdev: SCSI device to configure queue depth for | |
968 | * @queue_depth: new queue depth | |
969 | * | |
970 | * This is libata standard hostt->change_queue_depth callback. | |
971 | * SCSI will call into this callback when user tries to set queue | |
972 | * depth via sysfs. | |
973 | * | |
974 | * LOCKING: | |
975 | * SCSI layer (we don't care) | |
976 | * | |
977 | * RETURNS: | |
978 | * Newly configured queue depth. | |
979 | */ | |
980 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
981 | { | |
982 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
983 | struct ata_device *dev; | |
360f654e | 984 | unsigned long flags; |
a6e6ce8e | 985 | |
c3c70c44 | 986 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
987 | return sdev->queue_depth; |
988 | ||
989 | dev = ata_scsi_find_dev(ap, sdev); | |
990 | if (!dev || !ata_dev_enabled(dev)) | |
991 | return sdev->queue_depth; | |
992 | ||
c3c70c44 | 993 | /* NCQ enabled? */ |
360f654e | 994 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
995 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
996 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 997 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
998 | queue_depth = 1; |
999 | } | |
360f654e TH |
1000 | spin_unlock_irqrestore(ap->lock, flags); |
1001 | ||
c3c70c44 TH |
1002 | /* limit and apply queue depth */ |
1003 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1004 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1005 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1006 | ||
1007 | if (sdev->queue_depth == queue_depth) | |
1008 | return -EINVAL; | |
1009 | ||
1010 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1011 | return queue_depth; |
1012 | } | |
1013 | ||
d9aca22c | 1014 | /* XXX: for spindown warning */ |
da071b42 TH |
1015 | static void ata_delayed_done_timerfn(unsigned long arg) |
1016 | { | |
1017 | struct scsi_cmnd *scmd = (void *)arg; | |
1018 | ||
1019 | scmd->scsi_done(scmd); | |
1020 | } | |
1021 | ||
d9aca22c | 1022 | /* XXX: for spindown warning */ |
da071b42 TH |
1023 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
1024 | { | |
1025 | static struct timer_list timer; | |
1026 | ||
1027 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
1028 | mod_timer(&timer, jiffies + 5 * HZ); | |
1029 | } | |
1030 | ||
972dcafb DG |
1031 | /** |
1032 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1033 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1034 | * |
1035 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1036 | * (to start). Perhaps these commands should be preceded by | |
1037 | * CHECK POWER MODE to see what power mode the device is already in. | |
1038 | * [See SAT revision 5 at www.t10.org] | |
1039 | * | |
1040 | * LOCKING: | |
cca3974e | 1041 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1042 | * |
1043 | * RETURNS: | |
1044 | * Zero on success, non-zero on error. | |
1045 | */ | |
ad706991 | 1046 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1047 | { |
542b1444 | 1048 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1049 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1050 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1051 | |
2e5704f6 TH |
1052 | if (scmd->cmd_len < 5) |
1053 | goto invalid_fld; | |
1054 | ||
972dcafb DG |
1055 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1056 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1057 | if (cdb[1] & 0x1) { |
972dcafb DG |
1058 | ; /* ignore IMMED bit, violates sat-r05 */ |
1059 | } | |
542b1444 | 1060 | if (cdb[4] & 0x2) |
ae006510 | 1061 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1062 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1063 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 TH |
1064 | |
1065 | if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) { | |
1066 | /* the device lacks PM support, finish without doing anything */ | |
1067 | scmd->result = SAM_STAT_GOOD; | |
1068 | return 1; | |
1069 | } | |
1070 | ||
542b1444 | 1071 | if (cdb[4] & 0x1) { |
972dcafb | 1072 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1073 | |
1074 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1075 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1076 | |
1077 | tf->lbah = 0x0; | |
1078 | tf->lbam = 0x0; | |
1079 | tf->lbal = 0x0; | |
1080 | tf->device |= ATA_LBA; | |
1081 | } else { | |
1082 | /* CHS */ | |
1083 | tf->lbal = 0x1; /* sect */ | |
1084 | tf->lbam = 0x0; /* cyl low */ | |
1085 | tf->lbah = 0x0; /* cyl high */ | |
1086 | } | |
1087 | ||
972dcafb | 1088 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 TH |
1089 | } else { |
1090 | /* XXX: This is for backward compatibility, will be | |
1091 | * removed. Read Documentation/feature-removal-schedule.txt | |
1092 | * for more info. | |
1093 | */ | |
d9aca22c | 1094 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
1095 | (system_state == SYSTEM_HALT || |
1096 | system_state == SYSTEM_POWER_OFF)) { | |
2dcb407e | 1097 | static unsigned long warned; |
920a4b10 | 1098 | |
da071b42 | 1099 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
1100 | ata_dev_printk(qc->dev, KERN_WARNING, |
1101 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
1102 | "UPDATE SHUTDOWN UTILITY\n"); | |
1103 | ata_dev_printk(qc->dev, KERN_WARNING, | |
1104 | "For more info, visit " | |
1105 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
1106 | |
1107 | /* ->scsi_done is not used, use it for | |
1108 | * delayed completion. | |
1109 | */ | |
1110 | scmd->scsi_done = qc->scsidone; | |
1111 | qc->scsidone = ata_delayed_done; | |
920a4b10 TH |
1112 | } |
1113 | scmd->result = SAM_STAT_GOOD; | |
1114 | return 1; | |
1115 | } | |
1116 | ||
78981a7c RH |
1117 | /* Issue ATA STANDBY IMMEDIATE command */ |
1118 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1119 | } |
78981a7c | 1120 | |
972dcafb DG |
1121 | /* |
1122 | * Standby and Idle condition timers could be implemented but that | |
1123 | * would require libata to implement the Power condition mode page | |
1124 | * and allow the user to change it. Changing mode pages requires | |
1125 | * MODE SELECT to be implemented. | |
1126 | */ | |
1127 | ||
1128 | return 0; | |
ae006510 DG |
1129 | |
1130 | invalid_fld: | |
542b1444 | 1131 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1132 | /* "Invalid field in cbd" */ |
1133 | return 1; | |
972dcafb DG |
1134 | } |
1135 | ||
1136 | ||
1da177e4 LT |
1137 | /** |
1138 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1139 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1140 | * |
1141 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1142 | * FLUSH CACHE EXT. | |
1143 | * | |
1144 | * LOCKING: | |
cca3974e | 1145 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1146 | * |
1147 | * RETURNS: | |
1148 | * Zero on success, non-zero on error. | |
1149 | */ | |
ad706991 | 1150 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1151 | { |
1152 | struct ata_taskfile *tf = &qc->tf; | |
1153 | ||
1154 | tf->flags |= ATA_TFLAG_DEVICE; | |
1155 | tf->protocol = ATA_PROT_NODATA; | |
1156 | ||
6fc49adb | 1157 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1158 | tf->command = ATA_CMD_FLUSH_EXT; |
1159 | else | |
1160 | tf->command = ATA_CMD_FLUSH; | |
1161 | ||
b666da35 TH |
1162 | /* flush is critical for IO integrity, consider it an IO command */ |
1163 | qc->flags |= ATA_QCFLAG_IO; | |
1164 | ||
1da177e4 LT |
1165 | return 0; |
1166 | } | |
1167 | ||
3aef5231 AL |
1168 | /** |
1169 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1170 | * @cdb: SCSI command to translate |
3aef5231 AL |
1171 | * |
1172 | * Calculate LBA and transfer length for 6-byte commands. | |
1173 | * | |
1174 | * RETURNS: | |
1175 | * @plba: the LBA | |
1176 | * @plen: the transfer length | |
1177 | */ | |
542b1444 | 1178 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1179 | { |
1180 | u64 lba = 0; | |
6c7b7d2b | 1181 | u32 len; |
3aef5231 AL |
1182 | |
1183 | VPRINTK("six-byte command\n"); | |
1184 | ||
6c7b7d2b | 1185 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1186 | lba |= ((u64)cdb[2]) << 8; |
1187 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1188 | |
6c7b7d2b | 1189 | len = cdb[4]; |
3aef5231 AL |
1190 | |
1191 | *plba = lba; | |
1192 | *plen = len; | |
1193 | } | |
1194 | ||
1195 | /** | |
1196 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1197 | * @cdb: SCSI command to translate |
3aef5231 AL |
1198 | * |
1199 | * Calculate LBA and transfer length for 10-byte commands. | |
1200 | * | |
1201 | * RETURNS: | |
1202 | * @plba: the LBA | |
1203 | * @plen: the transfer length | |
1204 | */ | |
542b1444 | 1205 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1206 | { |
1207 | u64 lba = 0; | |
1208 | u32 len = 0; | |
1209 | ||
1210 | VPRINTK("ten-byte command\n"); | |
1211 | ||
542b1444 TH |
1212 | lba |= ((u64)cdb[2]) << 24; |
1213 | lba |= ((u64)cdb[3]) << 16; | |
1214 | lba |= ((u64)cdb[4]) << 8; | |
1215 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1216 | |
542b1444 TH |
1217 | len |= ((u32)cdb[7]) << 8; |
1218 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1219 | |
1220 | *plba = lba; | |
1221 | *plen = len; | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1226 | * @cdb: SCSI command to translate |
3aef5231 AL |
1227 | * |
1228 | * Calculate LBA and transfer length for 16-byte commands. | |
1229 | * | |
1230 | * RETURNS: | |
1231 | * @plba: the LBA | |
1232 | * @plen: the transfer length | |
1233 | */ | |
542b1444 | 1234 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1235 | { |
1236 | u64 lba = 0; | |
1237 | u32 len = 0; | |
1238 | ||
1239 | VPRINTK("sixteen-byte command\n"); | |
1240 | ||
542b1444 TH |
1241 | lba |= ((u64)cdb[2]) << 56; |
1242 | lba |= ((u64)cdb[3]) << 48; | |
1243 | lba |= ((u64)cdb[4]) << 40; | |
1244 | lba |= ((u64)cdb[5]) << 32; | |
1245 | lba |= ((u64)cdb[6]) << 24; | |
1246 | lba |= ((u64)cdb[7]) << 16; | |
1247 | lba |= ((u64)cdb[8]) << 8; | |
1248 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1249 | |
542b1444 TH |
1250 | len |= ((u32)cdb[10]) << 24; |
1251 | len |= ((u32)cdb[11]) << 16; | |
1252 | len |= ((u32)cdb[12]) << 8; | |
1253 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1254 | |
1255 | *plba = lba; | |
1256 | *plen = len; | |
1257 | } | |
1258 | ||
1da177e4 LT |
1259 | /** |
1260 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1261 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1262 | * |
1263 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1264 | * | |
1265 | * LOCKING: | |
cca3974e | 1266 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1267 | * |
1268 | * RETURNS: | |
1269 | * Zero on success, non-zero on error. | |
1270 | */ | |
ad706991 | 1271 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1272 | { |
542b1444 | 1273 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1274 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1275 | struct ata_device *dev = qc->dev; |
1da177e4 | 1276 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1277 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1278 | u64 block; |
1279 | u32 n_block; | |
1da177e4 LT |
1280 | |
1281 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1282 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1283 | |
2e5704f6 TH |
1284 | if (cdb[0] == VERIFY) { |
1285 | if (scmd->cmd_len < 10) | |
1286 | goto invalid_fld; | |
542b1444 | 1287 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1288 | } else if (cdb[0] == VERIFY_16) { |
1289 | if (scmd->cmd_len < 16) | |
1290 | goto invalid_fld; | |
542b1444 | 1291 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1292 | } else |
ae006510 | 1293 | goto invalid_fld; |
1da177e4 | 1294 | |
8bf62ece | 1295 | if (!n_block) |
ae006510 | 1296 | goto nothing_to_do; |
8bf62ece | 1297 | if (block >= dev_sectors) |
ae006510 | 1298 | goto out_of_range; |
8bf62ece | 1299 | if ((block + n_block) > dev_sectors) |
ae006510 | 1300 | goto out_of_range; |
1da177e4 | 1301 | |
07506697 AL |
1302 | if (dev->flags & ATA_DFLAG_LBA) { |
1303 | tf->flags |= ATA_TFLAG_LBA; | |
1304 | ||
c6a33e24 AL |
1305 | if (lba_28_ok(block, n_block)) { |
1306 | /* use LBA28 */ | |
1307 | tf->command = ATA_CMD_VERIFY; | |
1308 | tf->device |= (block >> 24) & 0xf; | |
1309 | } else if (lba_48_ok(block, n_block)) { | |
1310 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1311 | goto out_of_range; | |
07506697 AL |
1312 | |
1313 | /* use LBA48 */ | |
1314 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1315 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1316 | |
8bf62ece | 1317 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1318 | |
8bf62ece AL |
1319 | tf->hob_lbah = (block >> 40) & 0xff; |
1320 | tf->hob_lbam = (block >> 32) & 0xff; | |
1321 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1322 | } else |
1323 | /* request too large even for LBA48 */ | |
1324 | goto out_of_range; | |
8bf62ece AL |
1325 | |
1326 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1327 | |
8bf62ece AL |
1328 | tf->lbah = (block >> 16) & 0xff; |
1329 | tf->lbam = (block >> 8) & 0xff; | |
1330 | tf->lbal = block & 0xff; | |
1da177e4 | 1331 | |
8bf62ece AL |
1332 | tf->device |= ATA_LBA; |
1333 | } else { | |
1334 | /* CHS */ | |
1335 | u32 sect, head, cyl, track; | |
1336 | ||
c6a33e24 AL |
1337 | if (!lba_28_ok(block, n_block)) |
1338 | goto out_of_range; | |
07506697 | 1339 | |
8bf62ece AL |
1340 | /* Convert LBA to CHS */ |
1341 | track = (u32)block / dev->sectors; | |
1342 | cyl = track / dev->heads; | |
1343 | head = track % dev->heads; | |
1344 | sect = (u32)block % dev->sectors + 1; | |
1345 | ||
c187c4b5 AL |
1346 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1347 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1348 | |
1349 | /* Check whether the converted CHS can fit. | |
1350 | Cylinder: 0-65535 | |
8bf62ece AL |
1351 | Head: 0-15 |
1352 | Sector: 1-255*/ | |
2e9edbf8 | 1353 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1354 | goto out_of_range; |
2e9edbf8 | 1355 | |
8bf62ece AL |
1356 | tf->command = ATA_CMD_VERIFY; |
1357 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1358 | tf->lbal = sect; | |
1359 | tf->lbam = cyl; | |
1360 | tf->lbah = cyl >> 8; | |
1361 | tf->device |= head; | |
1362 | } | |
1da177e4 LT |
1363 | |
1364 | return 0; | |
ae006510 DG |
1365 | |
1366 | invalid_fld: | |
542b1444 | 1367 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1368 | /* "Invalid field in cbd" */ |
1369 | return 1; | |
1370 | ||
1371 | out_of_range: | |
542b1444 | 1372 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1373 | /* "Logical Block Address out of range" */ |
1374 | return 1; | |
1375 | ||
1376 | nothing_to_do: | |
542b1444 | 1377 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1378 | return 1; |
1da177e4 LT |
1379 | } |
1380 | ||
1381 | /** | |
1382 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1383 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1384 | * |
1385 | * Converts any of six SCSI read/write commands into the | |
1386 | * ATA counterpart, including starting sector (LBA), | |
1387 | * sector count, and taking into account the device's LBA48 | |
1388 | * support. | |
1389 | * | |
1390 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1391 | * %WRITE_16 are currently supported. | |
1392 | * | |
1393 | * LOCKING: | |
cca3974e | 1394 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1395 | * |
1396 | * RETURNS: | |
1397 | * Zero on success, non-zero on error. | |
1398 | */ | |
ad706991 | 1399 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1400 | { |
542b1444 | 1401 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1402 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1403 | unsigned int tf_flags = 0; |
3aef5231 AL |
1404 | u64 block; |
1405 | u32 n_block; | |
bd056d7e | 1406 | int rc; |
1da177e4 | 1407 | |
542b1444 | 1408 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1409 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1410 | |
9a3dccc4 | 1411 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1412 | switch (cdb[0]) { |
3aef5231 AL |
1413 | case READ_10: |
1414 | case WRITE_10: | |
2e5704f6 TH |
1415 | if (unlikely(scmd->cmd_len < 10)) |
1416 | goto invalid_fld; | |
542b1444 TH |
1417 | scsi_10_lba_len(cdb, &block, &n_block); |
1418 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1419 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1420 | break; |
1421 | case READ_6: | |
1422 | case WRITE_6: | |
2e5704f6 TH |
1423 | if (unlikely(scmd->cmd_len < 6)) |
1424 | goto invalid_fld; | |
542b1444 | 1425 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1426 | |
1427 | /* for 6-byte r/w commands, transfer length 0 | |
1428 | * means 256 blocks of data, not 0 block. | |
1429 | */ | |
76b2bf9b JG |
1430 | if (!n_block) |
1431 | n_block = 256; | |
3aef5231 AL |
1432 | break; |
1433 | case READ_16: | |
1434 | case WRITE_16: | |
2e5704f6 TH |
1435 | if (unlikely(scmd->cmd_len < 16)) |
1436 | goto invalid_fld; | |
542b1444 TH |
1437 | scsi_16_lba_len(cdb, &block, &n_block); |
1438 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1439 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1440 | break; |
1441 | default: | |
8bf62ece | 1442 | DPRINTK("no-byte command\n"); |
ae006510 | 1443 | goto invalid_fld; |
1da177e4 LT |
1444 | } |
1445 | ||
8bf62ece AL |
1446 | /* Check and compose ATA command */ |
1447 | if (!n_block) | |
c187c4b5 AL |
1448 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1449 | * length 0 means transfer 0 block of data. | |
1450 | * However, for ATA R/W commands, sector count 0 means | |
1451 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1452 | * |
1453 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1454 | */ |
ae006510 | 1455 | goto nothing_to_do; |
1da177e4 | 1456 | |
bd056d7e | 1457 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1458 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1459 | |
bd056d7e TH |
1460 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1461 | qc->tag); | |
1462 | if (likely(rc == 0)) | |
1463 | return 0; | |
ae006510 | 1464 | |
bd056d7e TH |
1465 | if (rc == -ERANGE) |
1466 | goto out_of_range; | |
1467 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1468 | invalid_fld: |
542b1444 | 1469 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1470 | /* "Invalid field in cbd" */ |
1471 | return 1; | |
1472 | ||
1473 | out_of_range: | |
542b1444 | 1474 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1475 | /* "Logical Block Address out of range" */ |
1476 | return 1; | |
1477 | ||
1478 | nothing_to_do: | |
542b1444 | 1479 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1480 | return 1; |
1da177e4 LT |
1481 | } |
1482 | ||
77853bf2 | 1483 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1484 | { |
c31f571d | 1485 | struct ata_port *ap = qc->ap; |
1da177e4 | 1486 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1487 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1488 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1489 | |
1490 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1491 | * user mandated it or if there's an error. Note that if we | |
1492 | * generate because the user forced us to, a check condition | |
1493 | * is generated and the ATA register values are returned | |
1494 | * whether the command completed successfully or not. If there | |
1495 | * was no error, SK, ASC and ASCQ will all be zero. | |
1496 | */ | |
a7dac447 | 1497 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1498 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1499 | ata_gen_passthru_sense(qc); |
b095518e JG |
1500 | } else { |
1501 | if (!need_sense) { | |
1502 | cmd->result = SAM_STAT_GOOD; | |
1503 | } else { | |
1504 | /* TODO: decide which descriptor format to use | |
1505 | * for 48b LBA devices and call that here | |
1506 | * instead of the fixed desc, which is only | |
1507 | * good for smaller LBA (and maybe CHS?) | |
1508 | * devices. | |
1509 | */ | |
750426aa | 1510 | ata_gen_ata_sense(qc); |
b095518e JG |
1511 | } |
1512 | } | |
1da177e4 | 1513 | |
d9aca22c | 1514 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1515 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1516 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1517 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1518 | else if (likely(system_state != SYSTEM_HALT && | |
1519 | system_state != SYSTEM_POWER_OFF)) | |
1520 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1521 | ||
c31f571d | 1522 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1523 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1524 | |
1525 | qc->scsidone(cmd); | |
1526 | ||
77853bf2 | 1527 | ata_qc_free(qc); |
1da177e4 LT |
1528 | } |
1529 | ||
1530 | /** | |
1531 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1532 | * @dev: ATA device to which the command is addressed |
1533 | * @cmd: SCSI command to execute | |
1534 | * @done: SCSI command completion function | |
1535 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1536 | * | |
1537 | * Our ->queuecommand() function has decided that the SCSI | |
1538 | * command issued can be directly translated into an ATA | |
1539 | * command, rather than handled internally. | |
1540 | * | |
1541 | * This function sets up an ata_queued_cmd structure for the | |
1542 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1543 | * | |
ae006510 DG |
1544 | * The xlat_func argument (actor) returns 0 if ready to execute |
1545 | * ATA command, else 1 to finish translation. If 1 is returned | |
1546 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1547 | * to be set reflecting an error condition or clean (early) | |
1548 | * termination. | |
1549 | * | |
1da177e4 | 1550 | * LOCKING: |
cca3974e | 1551 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1552 | * |
1553 | * RETURNS: | |
1554 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1555 | * needs to be deferred. | |
1da177e4 | 1556 | */ |
2115ea94 TH |
1557 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1558 | void (*done)(struct scsi_cmnd *), | |
1559 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1560 | { |
31cc23b3 | 1561 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1562 | struct ata_queued_cmd *qc; |
31cc23b3 | 1563 | int rc; |
1da177e4 LT |
1564 | |
1565 | VPRINTK("ENTER\n"); | |
1566 | ||
3373efd8 | 1567 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1568 | if (!qc) |
ae006510 | 1569 | goto err_mem; |
1da177e4 LT |
1570 | |
1571 | /* data is present; dma-map it */ | |
be7db055 CH |
1572 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1573 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1574 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1575 | ata_dev_printk(dev, KERN_WARNING, |
1576 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1577 | goto err_did; |
1da177e4 LT |
1578 | } |
1579 | ||
7120165c | 1580 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1581 | |
1582 | qc->dma_dir = cmd->sc_data_direction; | |
1583 | } | |
1584 | ||
1585 | qc->complete_fn = ata_scsi_qc_complete; | |
1586 | ||
ad706991 | 1587 | if (xlat_func(qc)) |
ae006510 | 1588 | goto early_finish; |
1da177e4 | 1589 | |
31cc23b3 TH |
1590 | if (ap->ops->qc_defer) { |
1591 | if ((rc = ap->ops->qc_defer(qc))) | |
1592 | goto defer; | |
1593 | } | |
1594 | ||
1da177e4 | 1595 | /* select device, send command to hardware */ |
8e0e694a | 1596 | ata_qc_issue(qc); |
1da177e4 LT |
1597 | |
1598 | VPRINTK("EXIT\n"); | |
2115ea94 | 1599 | return 0; |
1da177e4 | 1600 | |
ae006510 | 1601 | early_finish: |
2dcb407e | 1602 | ata_qc_free(qc); |
da071b42 | 1603 | qc->scsidone(cmd); |
ae006510 | 1604 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1605 | return 0; |
ae006510 DG |
1606 | |
1607 | err_did: | |
1da177e4 | 1608 | ata_qc_free(qc); |
ae006510 | 1609 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1610 | qc->scsidone(cmd); |
253b92ec | 1611 | err_mem: |
ae006510 | 1612 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1613 | return 0; |
3dc1d881 TH |
1614 | |
1615 | defer: | |
31cc23b3 | 1616 | ata_qc_free(qc); |
3dc1d881 | 1617 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1618 | if (rc == ATA_DEFER_LINK) |
1619 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1620 | else | |
1621 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1622 | } |
1623 | ||
1624 | /** | |
1625 | * ata_scsi_rbuf_get - Map response buffer. | |
1626 | * @cmd: SCSI command containing buffer to be mapped. | |
1627 | * @buf_out: Pointer to mapped area. | |
1628 | * | |
1629 | * Maps buffer contained within SCSI command @cmd. | |
1630 | * | |
1631 | * LOCKING: | |
cca3974e | 1632 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1633 | * |
1634 | * RETURNS: | |
1635 | * Length of response buffer. | |
1636 | */ | |
1637 | ||
1638 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1639 | { | |
1640 | u8 *buf; | |
1641 | unsigned int buflen; | |
1642 | ||
7120165c | 1643 | struct scatterlist *sg = scsi_sglist(cmd); |
1da177e4 | 1644 | |
e10b8c3f | 1645 | if (sg) { |
45711f1a | 1646 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; |
1da177e4 LT |
1647 | buflen = sg->length; |
1648 | } else { | |
e10b8c3f BH |
1649 | buf = NULL; |
1650 | buflen = 0; | |
1da177e4 LT |
1651 | } |
1652 | ||
1653 | *buf_out = buf; | |
1654 | return buflen; | |
1655 | } | |
1656 | ||
1657 | /** | |
1658 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1659 | * @cmd: SCSI command containing buffer to be unmapped. | |
1660 | * @buf: buffer to unmap | |
1661 | * | |
1662 | * Unmaps response buffer contained within @cmd. | |
1663 | * | |
1664 | * LOCKING: | |
cca3974e | 1665 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1666 | */ |
1667 | ||
1668 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1669 | { | |
7120165c | 1670 | struct scatterlist *sg = scsi_sglist(cmd); |
e10b8c3f | 1671 | if (sg) |
da02d2a1 | 1672 | kunmap_atomic(buf - sg->offset, KM_IRQ0); |
1da177e4 LT |
1673 | } |
1674 | ||
1675 | /** | |
1676 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1677 | * @args: device IDENTIFY data / SCSI command of interest. | |
1678 | * @actor: Callback hook for desired SCSI command simulator | |
1679 | * | |
1680 | * Takes care of the hard work of simulating a SCSI command... | |
1681 | * Mapping the response buffer, calling the command's handler, | |
1682 | * and handling the handler's return value. This return value | |
1683 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1684 | * completed successfully (0), or not (in which case cmd->result |
1685 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1686 | * |
1687 | * LOCKING: | |
cca3974e | 1688 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1689 | */ |
1690 | ||
1691 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
2dcb407e JG |
1692 | unsigned int (*actor) (struct ata_scsi_args *args, |
1693 | u8 *rbuf, unsigned int buflen)) | |
1da177e4 LT |
1694 | { |
1695 | u8 *rbuf; | |
1696 | unsigned int buflen, rc; | |
1697 | struct scsi_cmnd *cmd = args->cmd; | |
b445c568 JG |
1698 | unsigned long flags; |
1699 | ||
1700 | local_irq_save(flags); | |
1da177e4 LT |
1701 | |
1702 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1703 | memset(rbuf, 0, buflen); | |
1704 | rc = actor(args, rbuf, buflen); | |
1705 | ata_scsi_rbuf_put(cmd, rbuf); | |
1706 | ||
b445c568 JG |
1707 | local_irq_restore(flags); |
1708 | ||
ae006510 | 1709 | if (rc == 0) |
1da177e4 | 1710 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1711 | args->done(cmd); |
1da177e4 LT |
1712 | } |
1713 | ||
6a36261e TH |
1714 | /** |
1715 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1716 | * @idx: byte index into SCSI response buffer | |
1717 | * @val: value to set | |
1718 | * | |
1719 | * To be used by SCSI command simulator functions. This macros | |
1720 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1721 | * are in scope. | |
1722 | * | |
1723 | * LOCKING: | |
1724 | * None. | |
1725 | */ | |
1726 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1727 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1728 | } while (0) | |
1729 | ||
1da177e4 LT |
1730 | /** |
1731 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1732 | * @args: device IDENTIFY data / SCSI command of interest. | |
1733 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1734 | * @buflen: Response buffer length. | |
1735 | * | |
1736 | * Returns standard device identification data associated | |
b142eb65 | 1737 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1738 | * |
1739 | * LOCKING: | |
cca3974e | 1740 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1741 | */ |
1742 | ||
1743 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1744 | unsigned int buflen) | |
1745 | { | |
1746 | u8 hdr[] = { | |
1747 | TYPE_DISK, | |
1748 | 0, | |
1749 | 0x5, /* claim SPC-3 version compatibility */ | |
1750 | 2, | |
1751 | 95 - 4 | |
1752 | }; | |
1753 | ||
1754 | /* set scsi removeable (RMB) bit per ata bit */ | |
1755 | if (ata_id_removeable(args->id)) | |
1756 | hdr[1] |= (1 << 7); | |
1757 | ||
1758 | VPRINTK("ENTER\n"); | |
1759 | ||
1760 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1761 | ||
1762 | if (buflen > 35) { | |
1763 | memcpy(&rbuf[8], "ATA ", 8); | |
a0cf733b TH |
1764 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); |
1765 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 LT |
1766 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1767 | memcpy(&rbuf[32], "n/a ", 4); | |
1768 | } | |
1769 | ||
1770 | if (buflen > 63) { | |
1771 | const u8 versions[] = { | |
1772 | 0x60, /* SAM-3 (no version claimed) */ | |
1773 | ||
1774 | 0x03, | |
1775 | 0x20, /* SBC-2 (no version claimed) */ | |
1776 | ||
1777 | 0x02, | |
1778 | 0x60 /* SPC-3 (no version claimed) */ | |
1779 | }; | |
1780 | ||
1781 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1782 | } | |
1783 | ||
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | /** | |
b142eb65 | 1788 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1789 | * @args: device IDENTIFY data / SCSI command of interest. |
1790 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1791 | * @buflen: Response buffer length. | |
1792 | * | |
b142eb65 | 1793 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1794 | * |
1795 | * LOCKING: | |
cca3974e | 1796 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1797 | */ |
1798 | ||
1799 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1800 | unsigned int buflen) | |
1801 | { | |
1802 | const u8 pages[] = { | |
1803 | 0x00, /* page 0x00, this page */ | |
1804 | 0x80, /* page 0x80, unit serial no page */ | |
1805 | 0x83 /* page 0x83, device ident page */ | |
1806 | }; | |
b142eb65 | 1807 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1808 | |
1809 | if (buflen > 6) | |
1810 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1811 | ||
1812 | return 0; | |
1813 | } | |
1814 | ||
1815 | /** | |
b142eb65 | 1816 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1817 | * @args: device IDENTIFY data / SCSI command of interest. |
1818 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1819 | * @buflen: Response buffer length. | |
1820 | * | |
1821 | * Returns ATA device serial number. | |
1822 | * | |
1823 | * LOCKING: | |
cca3974e | 1824 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1825 | */ |
1826 | ||
1827 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1828 | unsigned int buflen) | |
1829 | { | |
1830 | const u8 hdr[] = { | |
1831 | 0, | |
1832 | 0x80, /* this page code */ | |
1833 | 0, | |
a0cf733b | 1834 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 LT |
1835 | }; |
1836 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1837 | ||
a0cf733b | 1838 | if (buflen > (ATA_ID_SERNO_LEN + 4 - 1)) |
6a62a04d | 1839 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
a0cf733b | 1840 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1da177e4 LT |
1841 | |
1842 | return 0; | |
1843 | } | |
1844 | ||
1da177e4 | 1845 | /** |
b142eb65 | 1846 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1847 | * @args: device IDENTIFY data / SCSI command of interest. |
1848 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1849 | * @buflen: Response buffer length. | |
1850 | * | |
b142eb65 JG |
1851 | * Yields two logical unit device identification designators: |
1852 | * - vendor specific ASCII containing the ATA serial number | |
1853 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1854 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1855 | * |
1856 | * LOCKING: | |
cca3974e | 1857 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1858 | */ |
1859 | ||
1860 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1861 | unsigned int buflen) | |
1862 | { | |
b142eb65 JG |
1863 | int num; |
1864 | const int sat_model_serial_desc_len = 68; | |
1da177e4 | 1865 | |
b142eb65 JG |
1866 | rbuf[1] = 0x83; /* this page code */ |
1867 | num = 4; | |
1868 | ||
a0cf733b | 1869 | if (buflen > (ATA_ID_SERNO_LEN + num + 3)) { |
b142eb65 | 1870 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2e9edbf8 | 1871 | rbuf[num + 0] = 2; |
a0cf733b | 1872 | rbuf[num + 3] = ATA_ID_SERNO_LEN; |
b142eb65 JG |
1873 | num += 4; |
1874 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1875 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1876 | num += ATA_ID_SERNO_LEN; | |
1da177e4 | 1877 | } |
b142eb65 JG |
1878 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1879 | /* SAT defined lu model and serial numbers descriptor */ | |
1880 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1881 | rbuf[num + 0] = 2; |
1882 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1883 | rbuf[num + 3] = sat_model_serial_desc_len; |
1884 | num += 4; | |
1885 | memcpy(rbuf + num, "ATA ", 8); | |
1886 | num += 8; | |
1887 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1888 | ATA_ID_PROD, ATA_ID_PROD_LEN); |
1889 | num += ATA_ID_PROD_LEN; | |
b142eb65 | 1890 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
a0cf733b TH |
1891 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1892 | num += ATA_ID_SERNO_LEN; | |
b142eb65 JG |
1893 | } |
1894 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1895 | return 0; |
1896 | } | |
1897 | ||
ad355b46 JG |
1898 | /** |
1899 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
1900 | * @args: device IDENTIFY data / SCSI command of interest. | |
1901 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1902 | * @buflen: Response buffer length. | |
1903 | * | |
1904 | * Yields SAT-specified ATA VPD page. | |
1905 | * | |
1906 | * LOCKING: | |
1907 | * spin_lock_irqsave(host lock) | |
1908 | */ | |
1909 | ||
08f01058 | 1910 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf, |
ad355b46 JG |
1911 | unsigned int buflen) |
1912 | { | |
1913 | u8 pbuf[60]; | |
1914 | struct ata_taskfile tf; | |
1915 | unsigned int i; | |
1916 | ||
1917 | if (!buflen) | |
1918 | return 0; | |
1919 | ||
1920 | memset(&pbuf, 0, sizeof(pbuf)); | |
1921 | memset(&tf, 0, sizeof(tf)); | |
1922 | ||
1923 | pbuf[1] = 0x89; /* our page code */ | |
1924 | pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
1925 | pbuf[3] = (0x238 & 0xff); | |
1926 | ||
c78968bb JG |
1927 | memcpy(&pbuf[8], "linux ", 8); |
1928 | memcpy(&pbuf[16], "libata ", 16); | |
1929 | memcpy(&pbuf[32], DRV_VERSION, 4); | |
ad355b46 JG |
1930 | ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4); |
1931 | ||
1932 | /* we don't store the ATA device signature, so we fake it */ | |
1933 | ||
1934 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
1935 | tf.lbal = 0x1; | |
1936 | tf.nsect = 0x1; | |
1937 | ||
1938 | ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */ | |
1939 | pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
1940 | ||
1941 | pbuf[56] = ATA_CMD_ID_ATA; | |
1942 | ||
1943 | i = min(buflen, 60U); | |
1944 | memcpy(rbuf, &pbuf[0], i); | |
1945 | buflen -= i; | |
1946 | ||
1947 | if (!buflen) | |
1948 | return 0; | |
1949 | ||
1950 | memcpy(&rbuf[60], &args->id[0], min(buflen, 512U)); | |
1951 | return 0; | |
1952 | } | |
1953 | ||
1da177e4 | 1954 | /** |
0cba632b | 1955 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1956 | * @args: device IDENTIFY data / SCSI command of interest. |
1957 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1958 | * @buflen: Response buffer length. | |
1959 | * | |
1960 | * No operation. Simply returns success to caller, to indicate | |
1961 | * that the caller should successfully complete this SCSI command. | |
1962 | * | |
1963 | * LOCKING: | |
cca3974e | 1964 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1965 | */ |
1966 | ||
1967 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1968 | unsigned int buflen) | |
1969 | { | |
1970 | VPRINTK("ENTER\n"); | |
1971 | return 0; | |
1972 | } | |
1973 | ||
1974 | /** | |
1975 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1976 | * @ptr_io: (input/output) Location to store more output data | |
1977 | * @last: End of output data buffer | |
1978 | * @buf: Pointer to BLOB being added to output buffer | |
1979 | * @buflen: Length of BLOB | |
1980 | * | |
1981 | * Store MODE SENSE data on an output buffer. | |
1982 | * | |
1983 | * LOCKING: | |
1984 | * None. | |
1985 | */ | |
1986 | ||
1987 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1988 | const u8 *buf, unsigned int buflen) | |
1989 | { | |
1990 | u8 *ptr = *ptr_io; | |
1991 | ||
1992 | if ((ptr + buflen - 1) > last) | |
1993 | return; | |
1994 | ||
1995 | memcpy(ptr, buf, buflen); | |
1996 | ||
1997 | ptr += buflen; | |
1998 | ||
1999 | *ptr_io = ptr; | |
2000 | } | |
2001 | ||
2002 | /** | |
2003 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2004 | * @id: device IDENTIFY data | |
2005 | * @ptr_io: (input/output) Location to store more output data | |
2006 | * @last: End of output data buffer | |
2007 | * | |
2008 | * Generate a caching info page, which conditionally indicates | |
2009 | * write caching to the SCSI layer, depending on device | |
2010 | * capabilities. | |
2011 | * | |
2012 | * LOCKING: | |
2013 | * None. | |
2014 | */ | |
2015 | ||
2016 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
2017 | const u8 *last) | |
2018 | { | |
00ac37f5 | 2019 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 2020 | |
00ac37f5 | 2021 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
2022 | if (ata_id_wcache_enabled(id)) |
2023 | page[2] |= (1 << 2); /* write cache enable */ | |
2024 | if (!ata_id_rahead_enabled(id)) | |
2025 | page[12] |= (1 << 5); /* disable read ahead */ | |
2026 | ||
2027 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
2028 | return sizeof(page); | |
2029 | } | |
2030 | ||
2031 | /** | |
2032 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
2033 | * @dev: Device associated with this MODE SENSE command | |
2034 | * @ptr_io: (input/output) Location to store more output data | |
2035 | * @last: End of output data buffer | |
2036 | * | |
2037 | * Generate a generic MODE SENSE control mode page. | |
2038 | * | |
2039 | * LOCKING: | |
2040 | * None. | |
2041 | */ | |
2042 | ||
2043 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
2044 | { | |
00ac37f5 DG |
2045 | ata_msense_push(ptr_io, last, def_control_mpage, |
2046 | sizeof(def_control_mpage)); | |
2047 | return sizeof(def_control_mpage); | |
1da177e4 LT |
2048 | } |
2049 | ||
2050 | /** | |
2051 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
2052 | * @dev: Device associated with this MODE SENSE command | |
2053 | * @ptr_io: (input/output) Location to store more output data | |
2054 | * @last: End of output data buffer | |
2055 | * | |
2056 | * Generate a generic MODE SENSE r/w error recovery page. | |
2057 | * | |
2058 | * LOCKING: | |
2059 | * None. | |
2060 | */ | |
2061 | ||
2062 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
2063 | { | |
1da177e4 | 2064 | |
00ac37f5 DG |
2065 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
2066 | sizeof(def_rw_recovery_mpage)); | |
2067 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
2068 | } |
2069 | ||
48bdc8ec JA |
2070 | /* |
2071 | * We can turn this into a real blacklist if it's needed, for now just | |
2072 | * blacklist any Maxtor BANC1G10 revision firmware | |
2073 | */ | |
2074 | static int ata_dev_supports_fua(u16 *id) | |
2075 | { | |
a0cf733b | 2076 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2077 | |
c3c013a2 JG |
2078 | if (!libata_fua) |
2079 | return 0; | |
48bdc8ec JA |
2080 | if (!ata_id_has_fua(id)) |
2081 | return 0; | |
2082 | ||
a0cf733b TH |
2083 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2084 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2085 | |
2e02671d | 2086 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2087 | return 1; |
2e02671d | 2088 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2089 | return 1; |
2090 | ||
2091 | return 0; /* blacklisted */ | |
2092 | } | |
2093 | ||
1da177e4 LT |
2094 | /** |
2095 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2096 | * @args: device IDENTIFY data / SCSI command of interest. | |
2097 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2098 | * @buflen: Response buffer length. | |
2099 | * | |
00ac37f5 DG |
2100 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2101 | * access devices (e.g. disks) only. There should be no block | |
2102 | * descriptor for other device types. | |
1da177e4 LT |
2103 | * |
2104 | * LOCKING: | |
cca3974e | 2105 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2106 | */ |
2107 | ||
2108 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
2109 | unsigned int buflen) | |
2110 | { | |
9a3dccc4 | 2111 | struct ata_device *dev = args->dev; |
1da177e4 | 2112 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
2113 | const u8 sat_blk_desc[] = { |
2114 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2115 | 0, | |
2116 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2117 | }; | |
2118 | u8 pg, spg; | |
2119 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 2120 | u8 dpofua; |
1da177e4 LT |
2121 | |
2122 | VPRINTK("ENTER\n"); | |
2123 | ||
2124 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2125 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2126 | /* | |
2127 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2128 | */ |
00ac37f5 | 2129 | |
1da177e4 | 2130 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2131 | switch (page_control) { |
2132 | case 0: /* current */ | |
2133 | break; /* supported */ | |
2134 | case 3: /* saved */ | |
2135 | goto saving_not_supp; | |
2136 | case 1: /* changeable */ | |
2137 | case 2: /* defaults */ | |
2138 | default: | |
2139 | goto invalid_fld; | |
2140 | } | |
1da177e4 | 2141 | |
00ac37f5 DG |
2142 | if (six_byte) { |
2143 | output_len = 4 + (ebd ? 8 : 0); | |
2144 | alloc_len = scsicmd[4]; | |
2145 | } else { | |
2146 | output_len = 8 + (ebd ? 8 : 0); | |
2147 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2148 | } | |
2149 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
2150 | |
2151 | p = rbuf + output_len; | |
00ac37f5 | 2152 | last = rbuf + minlen - 1; |
1da177e4 | 2153 | |
00ac37f5 DG |
2154 | pg = scsicmd[2] & 0x3f; |
2155 | spg = scsicmd[3]; | |
2156 | /* | |
2157 | * No mode subpages supported (yet) but asking for _all_ | |
2158 | * subpages may be valid | |
2159 | */ | |
2160 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2161 | goto invalid_fld; | |
2162 | ||
2163 | switch(pg) { | |
2164 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
2165 | output_len += ata_msense_rw_recovery(&p, last); |
2166 | break; | |
2167 | ||
00ac37f5 | 2168 | case CACHE_MPAGE: |
1da177e4 LT |
2169 | output_len += ata_msense_caching(args->id, &p, last); |
2170 | break; | |
2171 | ||
00ac37f5 | 2172 | case CONTROL_MPAGE: { |
1da177e4 LT |
2173 | output_len += ata_msense_ctl_mode(&p, last); |
2174 | break; | |
2175 | } | |
2176 | ||
00ac37f5 | 2177 | case ALL_MPAGES: |
1da177e4 LT |
2178 | output_len += ata_msense_rw_recovery(&p, last); |
2179 | output_len += ata_msense_caching(args->id, &p, last); | |
2180 | output_len += ata_msense_ctl_mode(&p, last); | |
2181 | break; | |
2182 | ||
2183 | default: /* invalid page code */ | |
ae006510 | 2184 | goto invalid_fld; |
1da177e4 LT |
2185 | } |
2186 | ||
00ac37f5 DG |
2187 | if (minlen < 1) |
2188 | return 0; | |
9a3dccc4 TH |
2189 | |
2190 | dpofua = 0; | |
f79d409f | 2191 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2192 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2193 | dpofua = 1 << 4; | |
2194 | ||
1da177e4 LT |
2195 | if (six_byte) { |
2196 | output_len--; | |
2197 | rbuf[0] = output_len; | |
9a3dccc4 TH |
2198 | if (minlen > 2) |
2199 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
2200 | if (ebd) { |
2201 | if (minlen > 3) | |
2202 | rbuf[3] = sizeof(sat_blk_desc); | |
2203 | if (minlen > 11) | |
2204 | memcpy(rbuf + 4, sat_blk_desc, | |
2205 | sizeof(sat_blk_desc)); | |
2206 | } | |
1da177e4 LT |
2207 | } else { |
2208 | output_len -= 2; | |
2209 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
2210 | if (minlen > 1) |
2211 | rbuf[1] = output_len; | |
9a3dccc4 TH |
2212 | if (minlen > 3) |
2213 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
2214 | if (ebd) { |
2215 | if (minlen > 7) | |
2216 | rbuf[7] = sizeof(sat_blk_desc); | |
2217 | if (minlen > 15) | |
2218 | memcpy(rbuf + 8, sat_blk_desc, | |
2219 | sizeof(sat_blk_desc)); | |
2220 | } | |
1da177e4 | 2221 | } |
1da177e4 | 2222 | return 0; |
ae006510 DG |
2223 | |
2224 | invalid_fld: | |
2225 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2226 | /* "Invalid field in cbd" */ | |
2227 | return 1; | |
2228 | ||
2229 | saving_not_supp: | |
2230 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2231 | /* "Saving parameters not supported" */ | |
2232 | return 1; | |
1da177e4 LT |
2233 | } |
2234 | ||
2235 | /** | |
2236 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2237 | * @args: device IDENTIFY data / SCSI command of interest. | |
2238 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2239 | * @buflen: Response buffer length. | |
2240 | * | |
2241 | * Simulate READ CAPACITY commands. | |
2242 | * | |
2243 | * LOCKING: | |
6a36261e | 2244 | * None. |
1da177e4 | 2245 | */ |
1da177e4 | 2246 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
2dcb407e | 2247 | unsigned int buflen) |
1da177e4 | 2248 | { |
6a36261e | 2249 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2250 | |
2251 | VPRINTK("ENTER\n"); | |
2252 | ||
1da177e4 | 2253 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2254 | if (last_lba >= 0xffffffffULL) |
2255 | last_lba = 0xffffffff; | |
0c144d0d | 2256 | |
1da177e4 | 2257 | /* sector count, 32-bit */ |
6a36261e TH |
2258 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); |
2259 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2260 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2261 | ATA_SCSI_RBUF_SET(3, last_lba); | |
1da177e4 LT |
2262 | |
2263 | /* sector size */ | |
6a36261e | 2264 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); |
4ca4e439 | 2265 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE & 0xff); |
1da177e4 LT |
2266 | } else { |
2267 | /* sector count, 64-bit */ | |
6a36261e TH |
2268 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); |
2269 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2270 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2271 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2272 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2273 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2274 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2275 | ATA_SCSI_RBUF_SET(7, last_lba); | |
1da177e4 LT |
2276 | |
2277 | /* sector size */ | |
6a36261e | 2278 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); |
4ca4e439 | 2279 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE & 0xff); |
1da177e4 LT |
2280 | } |
2281 | ||
2282 | return 0; | |
2283 | } | |
2284 | ||
2285 | /** | |
2286 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2287 | * @args: device IDENTIFY data / SCSI command of interest. | |
2288 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2289 | * @buflen: Response buffer length. | |
2290 | * | |
2291 | * Simulate REPORT LUNS command. | |
2292 | * | |
2293 | * LOCKING: | |
cca3974e | 2294 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2295 | */ |
2296 | ||
2297 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2298 | unsigned int buflen) | |
2299 | { | |
2300 | VPRINTK("ENTER\n"); | |
2301 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
845c5834 DG |
2306 | /** |
2307 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2308 | * @cmd: SCSI request to be handled | |
2309 | * @sk: SCSI-defined sense key | |
2310 | * @asc: SCSI-defined additional sense code | |
2311 | * @ascq: SCSI-defined additional sense code qualifier | |
2312 | * | |
2313 | * Helper function that builds a valid fixed format, current | |
2314 | * response code and the given sense key (sk), additional sense | |
2315 | * code (asc) and additional sense code qualifier (ascq) with | |
2316 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2317 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2318 | * | |
2319 | * LOCKING: | |
2320 | * Not required | |
2321 | */ | |
2322 | ||
2323 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2324 | { | |
2325 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2326 | ||
2327 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2328 | cmd->sense_buffer[2] = sk; | |
2329 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2330 | cmd->sense_buffer[12] = asc; | |
2331 | cmd->sense_buffer[13] = ascq; | |
2332 | } | |
2333 | ||
1da177e4 LT |
2334 | /** |
2335 | * ata_scsi_badcmd - End a SCSI request with an error | |
2336 | * @cmd: SCSI request to be handled | |
2337 | * @done: SCSI command completion function | |
2338 | * @asc: SCSI-defined additional sense code | |
2339 | * @ascq: SCSI-defined additional sense code qualifier | |
2340 | * | |
2341 | * Helper function that completes a SCSI command with | |
2342 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2343 | * and the specified additional sense codes. | |
2344 | * | |
2345 | * LOCKING: | |
cca3974e | 2346 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2347 | */ |
2348 | ||
2349 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2350 | { | |
2351 | DPRINTK("ENTER\n"); | |
ae006510 | 2352 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2353 | |
2354 | done(cmd); | |
2355 | } | |
2356 | ||
77853bf2 | 2357 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2358 | { |
74e6c8c3 | 2359 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2360 | /* FIXME: not quite right; we don't want the |
2361 | * translation of taskfile registers into | |
2362 | * a sense descriptors, since that's only | |
2363 | * correct for ATA, not ATAPI | |
2364 | */ | |
750426aa | 2365 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2366 | } |
a939c963 | 2367 | |
c6e6e666 | 2368 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2369 | ata_qc_free(qc); |
c6e6e666 | 2370 | } |
a939c963 | 2371 | |
c6e6e666 JG |
2372 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2373 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2374 | { | |
2375 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2376 | } | |
2377 | ||
2378 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2379 | { | |
2380 | struct ata_port *ap = qc->ap; | |
2381 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2382 | ||
2383 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2384 | |
2385 | /* FIXME: is this needed? */ | |
7ccd720d | 2386 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2387 | |
c6e6e666 JG |
2388 | ap->ops->tf_read(ap, &qc->tf); |
2389 | ||
2390 | /* fill these in, for the case where they are -not- overwritten */ | |
2391 | cmd->sense_buffer[0] = 0x70; | |
2392 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2393 | ||
2394 | ata_qc_reinit(qc); | |
2395 | ||
93f8fecb | 2396 | /* setup sg table and init transfer direction */ |
cadb7345 | 2397 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2398 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2399 | qc->dma_dir = DMA_FROM_DEVICE; |
2400 | ||
6e7846e9 | 2401 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2402 | qc->cdb[0] = REQUEST_SENSE; |
2403 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2404 | ||
2405 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2406 | qc->tf.command = ATA_CMD_PACKET; | |
2407 | ||
c6e6e666 | 2408 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2409 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2410 | qc->tf.feature |= ATAPI_PKT_DMA; |
2411 | } else { | |
0dc36888 | 2412 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2413 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2414 | qc->tf.lbah = 0; | |
c6e6e666 | 2415 | } |
a939c963 JG |
2416 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2417 | ||
c6e6e666 | 2418 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2419 | |
8e0e694a | 2420 | ata_qc_issue(qc); |
a939c963 JG |
2421 | |
2422 | DPRINTK("EXIT\n"); | |
2423 | } | |
2424 | ||
77853bf2 | 2425 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2426 | { |
2427 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2428 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2429 | |
a7dac447 | 2430 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2431 | |
246619da TH |
2432 | /* handle completion from new EH */ |
2433 | if (unlikely(qc->ap->ops->error_handler && | |
2434 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2435 | ||
2436 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2437 | /* FIXME: not quite right; we don't want the | |
2438 | * translation of taskfile registers into a | |
2439 | * sense descriptors, since that's only | |
2440 | * correct for ATA, not ATAPI | |
2441 | */ | |
750426aa | 2442 | ata_gen_passthru_sense(qc); |
246619da TH |
2443 | } |
2444 | ||
22aac089 TH |
2445 | /* SCSI EH automatically locks door if sdev->locked is |
2446 | * set. Sometimes door lock request continues to | |
2447 | * fail, for example, when no media is present. This | |
2448 | * creates a loop - SCSI EH issues door lock which | |
2449 | * fails and gets invoked again to acquire sense data | |
2450 | * for the failed command. | |
2451 | * | |
2452 | * If door lock fails, always clear sdev->locked to | |
2453 | * avoid this infinite loop. | |
2454 | */ | |
2455 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2456 | qc->dev->sdev->locked = 0; | |
2457 | ||
246619da TH |
2458 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2459 | qc->scsidone(cmd); | |
2460 | ata_qc_free(qc); | |
2461 | return; | |
2462 | } | |
2463 | ||
2464 | /* successful completion or old EH failure path */ | |
a7dac447 | 2465 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2466 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2467 | atapi_request_sense(qc); |
77853bf2 | 2468 | return; |
74e6c8c3 | 2469 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2470 | /* FIXME: not quite right; we don't want the |
2471 | * translation of taskfile registers into | |
2472 | * a sense descriptors, since that's only | |
2473 | * correct for ATA, not ATAPI | |
2474 | */ | |
750426aa | 2475 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2476 | } else { |
1da177e4 LT |
2477 | u8 *scsicmd = cmd->cmnd; |
2478 | ||
fd71da46 | 2479 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2480 | u8 *buf = NULL; |
2481 | unsigned int buflen; | |
b445c568 JG |
2482 | unsigned long flags; |
2483 | ||
2484 | local_irq_save(flags); | |
1da177e4 LT |
2485 | |
2486 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2487 | |
2488 | /* ATAPI devices typically report zero for their SCSI version, | |
2489 | * and sometimes deviate from the spec WRT response data | |
2490 | * format. If SCSI version is reported as zero like normal, | |
2491 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2492 | * to indicate to the Linux scsi midlayer this is a modern | |
2493 | * device. 2) Ensure response data format / ATAPI information | |
2494 | * are always correct. | |
a15dbeb4 JG |
2495 | */ |
2496 | if (buf[2] == 0) { | |
2497 | buf[2] = 0x5; | |
2498 | buf[3] = 0x32; | |
2499 | } | |
2500 | ||
1da177e4 | 2501 | ata_scsi_rbuf_put(cmd, buf); |
b445c568 JG |
2502 | |
2503 | local_irq_restore(flags); | |
1da177e4 | 2504 | } |
a15dbeb4 | 2505 | |
1da177e4 LT |
2506 | cmd->result = SAM_STAT_GOOD; |
2507 | } | |
2508 | ||
2509 | qc->scsidone(cmd); | |
77853bf2 | 2510 | ata_qc_free(qc); |
1da177e4 LT |
2511 | } |
2512 | /** | |
2513 | * atapi_xlat - Initialize PACKET taskfile | |
2514 | * @qc: command structure to be initialized | |
1da177e4 LT |
2515 | * |
2516 | * LOCKING: | |
cca3974e | 2517 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2518 | * |
2519 | * RETURNS: | |
2520 | * Zero on success, non-zero on failure. | |
2521 | */ | |
ad706991 | 2522 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2523 | { |
542b1444 | 2524 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 LT |
2525 | struct ata_device *dev = qc->dev; |
2526 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
542b1444 | 2527 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
2db78dd3 | 2528 | unsigned int nbytes; |
1da177e4 | 2529 | |
2e5704f6 TH |
2530 | memset(qc->cdb, 0, dev->cdb_len); |
2531 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2532 | |
2533 | qc->complete_fn = atapi_qc_complete; | |
2534 | ||
2535 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2536 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2537 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2538 | DPRINTK("direction: write\n"); | |
2539 | } | |
2540 | ||
2541 | qc->tf.command = ATA_CMD_PACKET; | |
7a85f889 | 2542 | qc->nbytes = scsi_bufflen(scmd) + scmd->request->extra_len; |
e00f1ff3 TH |
2543 | |
2544 | /* check whether ATAPI DMA is safe */ | |
2545 | if (!using_pio && ata_check_atapi_dma(qc)) | |
2546 | using_pio = 1; | |
1da177e4 | 2547 | |
e190222d TH |
2548 | /* Some controller variants snoop this value for Packet |
2549 | * transfers to do state machine and FIFO management. Thus we | |
2550 | * want to set it properly, and for DMA where it is | |
2551 | * effectively meaningless. | |
2552 | */ | |
7a85f889 | 2553 | nbytes = min(scmd->request->data_len, (unsigned int)63 * 1024); |
2db78dd3 | 2554 | |
e190222d TH |
2555 | /* Most ATAPI devices which honor transfer chunk size don't |
2556 | * behave according to the spec when odd chunk size which | |
2557 | * matches the transfer length is specified. If the number of | |
2558 | * bytes to transfer is 2n+1. According to the spec, what | |
2559 | * should happen is to indicate that 2n+1 is going to be | |
2560 | * transferred and transfer 2n+2 bytes where the last byte is | |
2561 | * padding. | |
2562 | * | |
2563 | * In practice, this doesn't happen. ATAPI devices first | |
2564 | * indicate and transfer 2n bytes and then indicate and | |
2565 | * transfer 2 bytes where the last byte is padding. | |
2566 | * | |
2567 | * This inconsistency confuses several controllers which | |
2568 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2569 | * These controllers use actual number of transferred bytes to | |
2570 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2571 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2572 | * FISes are aligned to 4 bytes. This causes data corruption | |
2573 | * and buffer overrun. | |
2574 | * | |
2575 | * Always setting nbytes to even number solves this problem | |
2576 | * because then ATAPI devices don't have to split data at 2n | |
2577 | * boundaries. | |
2578 | */ | |
2579 | if (nbytes & 0x1) | |
2580 | nbytes++; | |
2581 | ||
2db78dd3 AC |
2582 | qc->tf.lbam = (nbytes & 0xFF); |
2583 | qc->tf.lbah = (nbytes >> 8); | |
2584 | ||
1da177e4 | 2585 | if (using_pio || nodata) { |
e00f1ff3 | 2586 | /* no data, or PIO data xfer */ |
1da177e4 | 2587 | if (nodata) |
0dc36888 | 2588 | qc->tf.protocol = ATAPI_PROT_NODATA; |
1da177e4 | 2589 | else |
0dc36888 | 2590 | qc->tf.protocol = ATAPI_PROT_PIO; |
e00f1ff3 TH |
2591 | } else { |
2592 | /* DMA data xfer */ | |
0dc36888 | 2593 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2594 | qc->tf.feature |= ATAPI_PKT_DMA; |
2595 | ||
91163006 TH |
2596 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2597 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2598 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2599 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2600 | } |
2601 | ||
2db78dd3 AC |
2602 | |
2603 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2604 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2605 | return 0; |
2606 | } | |
2607 | ||
2dcb407e | 2608 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2609 | { |
41bda9c9 TH |
2610 | if (ap->nr_pmp_links == 0) { |
2611 | if (likely(devno < ata_link_max_devices(&ap->link))) | |
2612 | return &ap->link.device[devno]; | |
2613 | } else { | |
2614 | if (likely(devno < ap->nr_pmp_links)) | |
2615 | return &ap->pmp_link[devno].device[0]; | |
2616 | } | |
2617 | ||
ab5b3a5b TH |
2618 | return NULL; |
2619 | } | |
2620 | ||
2dcb407e JG |
2621 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2622 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2623 | { |
41bda9c9 TH |
2624 | int devno; |
2625 | ||
ab5b3a5b | 2626 | /* skip commands not addressed to targets we simulate */ |
41bda9c9 TH |
2627 | if (ap->nr_pmp_links == 0) { |
2628 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2629 | return NULL; | |
2630 | devno = scsidev->id; | |
2631 | } else { | |
2632 | if (unlikely(scsidev->id || scsidev->lun)) | |
2633 | return NULL; | |
2634 | devno = scsidev->channel; | |
2635 | } | |
ab5b3a5b | 2636 | |
41bda9c9 | 2637 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2638 | } |
2639 | ||
99ba9e09 BK |
2640 | /** |
2641 | * ata_scsi_dev_enabled - determine if device is enabled | |
2642 | * @dev: ATA device | |
2643 | * | |
2644 | * Determine if commands should be sent to the specified device. | |
2645 | * | |
2646 | * LOCKING: | |
cca3974e | 2647 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2648 | * |
2649 | * RETURNS: | |
2650 | * 0 if commands are not allowed / 1 if commands are allowed | |
2651 | */ | |
2652 | ||
2653 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2654 | { | |
2655 | if (unlikely(!ata_dev_enabled(dev))) | |
2656 | return 0; | |
2657 | ||
9af5c9c9 | 2658 | if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) { |
99ba9e09 BK |
2659 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { |
2660 | ata_dev_printk(dev, KERN_WARNING, | |
2661 | "WARNING: ATAPI is %s, device ignored.\n", | |
2662 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2663 | return 0; | |
2664 | } | |
2665 | } | |
2666 | ||
2667 | return 1; | |
2668 | } | |
2669 | ||
1da177e4 LT |
2670 | /** |
2671 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2672 | * @ap: ATA port to which the device is attached | |
2673 | * @scsidev: SCSI device from which we derive the ATA device | |
2674 | * | |
2675 | * Given various information provided in struct scsi_cmnd, | |
2676 | * map that onto an ATA bus, and using that mapping | |
2677 | * determine which ata_device is associated with the | |
2678 | * SCSI command to be sent. | |
2679 | * | |
2680 | * LOCKING: | |
cca3974e | 2681 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2682 | * |
2683 | * RETURNS: | |
2684 | * Associated ATA device, or %NULL if not found. | |
2685 | */ | |
1da177e4 | 2686 | static struct ata_device * |
057ace5e | 2687 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2688 | { |
ab5b3a5b | 2689 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2690 | |
99ba9e09 | 2691 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2692 | return NULL; |
2693 | ||
1da177e4 LT |
2694 | return dev; |
2695 | } | |
2696 | ||
b095518e JG |
2697 | /* |
2698 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2699 | * @byte1: Byte 1 from pass-thru CDB. | |
2700 | * | |
2701 | * RETURNS: | |
2702 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2703 | */ | |
2704 | static u8 | |
2705 | ata_scsi_map_proto(u8 byte1) | |
2706 | { | |
2707 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2708 | case 3: /* Non-data */ |
2709 | return ATA_PROT_NODATA; | |
2710 | ||
2711 | case 6: /* DMA */ | |
2712 | case 10: /* UDMA Data-in */ | |
2713 | case 11: /* UDMA Data-Out */ | |
2714 | return ATA_PROT_DMA; | |
2715 | ||
2716 | case 4: /* PIO Data-in */ | |
2717 | case 5: /* PIO Data-out */ | |
2718 | return ATA_PROT_PIO; | |
2719 | ||
2720 | case 0: /* Hard Reset */ | |
2721 | case 1: /* SRST */ | |
2722 | case 8: /* Device Diagnostic */ | |
2723 | case 9: /* Device Reset */ | |
2724 | case 7: /* DMA Queued */ | |
2725 | case 12: /* FPDMA */ | |
2726 | case 15: /* Return Response Info */ | |
2727 | default: /* Reserved */ | |
2728 | break; | |
b095518e JG |
2729 | } |
2730 | ||
2731 | return ATA_PROT_UNKNOWN; | |
2732 | } | |
2733 | ||
2734 | /** | |
2735 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2736 | * @qc: command structure to be initialized | |
b095518e JG |
2737 | * |
2738 | * Handles either 12 or 16-byte versions of the CDB. | |
2739 | * | |
2740 | * RETURNS: | |
2741 | * Zero on success, non-zero on failure. | |
2742 | */ | |
ad706991 | 2743 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2744 | { |
2745 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2746 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2747 | struct ata_device *dev = qc->dev; |
ad706991 | 2748 | const u8 *cdb = scmd->cmnd; |
b095518e | 2749 | |
542b1444 | 2750 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2751 | goto invalid_fld; |
8190bdb9 | 2752 | |
ae8d4ee7 AC |
2753 | /* |
2754 | * Filter TPM commands by default. These provide an | |
2755 | * essentially uncontrolled encrypted "back door" between | |
2756 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2757 | * have a real reason for wanting to use them. This ensures | |
2758 | * that installed software cannot easily mess stuff up without | |
2759 | * user intent. DVR type users will probably ship with this enabled | |
2760 | * for movie content management. | |
2761 | * | |
2762 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock | |
2763 | * for this and should do in future but that it is not sufficient as | |
2764 | * DCS is an optional feature set. Thus we also do the software filter | |
2765 | * so that we comply with the TC consortium stated goal that the user | |
2766 | * can turn off TC features of their system. | |
2767 | */ | |
2768 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) | |
2769 | goto invalid_fld; | |
2770 | ||
f79d409f AC |
2771 | /* We may not issue DMA commands if no DMA mode is set */ |
2772 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2773 | goto invalid_fld; | |
b095518e JG |
2774 | |
2775 | /* | |
2776 | * 12 and 16 byte CDBs use different offsets to | |
2777 | * provide the various register values. | |
2778 | */ | |
542b1444 | 2779 | if (cdb[0] == ATA_16) { |
b095518e JG |
2780 | /* |
2781 | * 16-byte CDB - may contain extended commands. | |
2782 | * | |
2783 | * If that is the case, copy the upper byte register values. | |
2784 | */ | |
542b1444 TH |
2785 | if (cdb[1] & 0x01) { |
2786 | tf->hob_feature = cdb[3]; | |
2787 | tf->hob_nsect = cdb[5]; | |
2788 | tf->hob_lbal = cdb[7]; | |
2789 | tf->hob_lbam = cdb[9]; | |
2790 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2791 | tf->flags |= ATA_TFLAG_LBA48; |
2792 | } else | |
2793 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2794 | ||
2795 | /* | |
2796 | * Always copy low byte, device and command registers. | |
2797 | */ | |
542b1444 TH |
2798 | tf->feature = cdb[4]; |
2799 | tf->nsect = cdb[6]; | |
2800 | tf->lbal = cdb[8]; | |
2801 | tf->lbam = cdb[10]; | |
2802 | tf->lbah = cdb[12]; | |
2803 | tf->device = cdb[13]; | |
2804 | tf->command = cdb[14]; | |
b095518e JG |
2805 | } else { |
2806 | /* | |
2807 | * 12-byte CDB - incapable of extended commands. | |
2808 | */ | |
2809 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2810 | ||
542b1444 TH |
2811 | tf->feature = cdb[3]; |
2812 | tf->nsect = cdb[4]; | |
2813 | tf->lbal = cdb[5]; | |
2814 | tf->lbam = cdb[6]; | |
2815 | tf->lbah = cdb[7]; | |
2816 | tf->device = cdb[8]; | |
2817 | tf->command = cdb[9]; | |
b095518e | 2818 | } |
fa4453c4 AL |
2819 | |
2820 | /* enforce correct master/slave bit */ | |
2821 | tf->device = dev->devno ? | |
2822 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2823 | |
1dce589c AL |
2824 | /* sanity check for pio multi commands */ |
2825 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2826 | goto invalid_fld; | |
2827 | ||
2828 | if (is_multi_taskfile(tf)) { | |
2829 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2830 | ||
2831 | /* compare the passed through multi_count | |
2832 | * with the cached multi_count of libata | |
2833 | */ | |
2834 | if (multi_count != dev->multi_count) | |
2835 | ata_dev_printk(dev, KERN_WARNING, | |
2836 | "invalid multi_count %u ignored\n", | |
2837 | multi_count); | |
d26fc955 | 2838 | } |
1dce589c | 2839 | |
5a5dbd18 ML |
2840 | /* READ/WRITE LONG use a non-standard sect_size */ |
2841 | qc->sect_size = ATA_SECT_SIZE; | |
2842 | switch (tf->command) { | |
2843 | case ATA_CMD_READ_LONG: | |
2844 | case ATA_CMD_READ_LONG_ONCE: | |
2845 | case ATA_CMD_WRITE_LONG: | |
2846 | case ATA_CMD_WRITE_LONG_ONCE: | |
2847 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2848 | goto invalid_fld; | |
7120165c | 2849 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2850 | } |
2851 | ||
b095518e JG |
2852 | /* |
2853 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2854 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2855 | * by an update to hardware-specific registers for each | |
2856 | * controller (i.e. the reason for ->set_piomode(), | |
2857 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2858 | */ | |
2859 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2860 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2861 | goto invalid_fld; |
b095518e JG |
2862 | |
2863 | /* | |
2864 | * Set flags so that all registers will be written, | |
2865 | * and pass on write indication (used for PIO/DMA | |
2866 | * setup.) | |
2867 | */ | |
2868 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2869 | ||
542b1444 | 2870 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2871 | tf->flags |= ATA_TFLAG_WRITE; |
2872 | ||
2873 | /* | |
2874 | * Set transfer length. | |
2875 | * | |
2876 | * TODO: find out if we need to do more here to | |
2877 | * cover scatter/gather case. | |
2878 | */ | |
7a85f889 | 2879 | qc->nbytes = scsi_bufflen(scmd) + scmd->request->extra_len; |
b095518e | 2880 | |
e027bd36 TH |
2881 | /* request result TF and be quiet about device error */ |
2882 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
e61e0672 | 2883 | |
b095518e | 2884 | return 0; |
9a405257 TH |
2885 | |
2886 | invalid_fld: | |
542b1444 | 2887 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2888 | /* "Invalid field in cdb" */ |
2889 | return 1; | |
b095518e JG |
2890 | } |
2891 | ||
1da177e4 LT |
2892 | /** |
2893 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2894 | * @dev: ATA device | |
2895 | * @cmd: SCSI command opcode to consider | |
2896 | * | |
2897 | * Look up the SCSI command given, and determine whether the | |
2898 | * SCSI command is to be translated or simulated. | |
2899 | * | |
2900 | * RETURNS: | |
2901 | * Pointer to translation function if possible, %NULL if not. | |
2902 | */ | |
2903 | ||
2904 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2905 | { | |
2906 | switch (cmd) { | |
2907 | case READ_6: | |
2908 | case READ_10: | |
2909 | case READ_16: | |
2910 | ||
2911 | case WRITE_6: | |
2912 | case WRITE_10: | |
2913 | case WRITE_16: | |
2914 | return ata_scsi_rw_xlat; | |
2915 | ||
2916 | case SYNCHRONIZE_CACHE: | |
2917 | if (ata_try_flush_cache(dev)) | |
2918 | return ata_scsi_flush_xlat; | |
2919 | break; | |
2920 | ||
2921 | case VERIFY: | |
2922 | case VERIFY_16: | |
2923 | return ata_scsi_verify_xlat; | |
b095518e JG |
2924 | |
2925 | case ATA_12: | |
2926 | case ATA_16: | |
2927 | return ata_scsi_pass_thru; | |
da61396d | 2928 | |
972dcafb DG |
2929 | case START_STOP: |
2930 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2931 | } |
2932 | ||
2933 | return NULL; | |
2934 | } | |
2935 | ||
2936 | /** | |
2937 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2938 | * @ap: ATA port to which the command was being sent | |
2939 | * @cmd: SCSI command to dump | |
2940 | * | |
2941 | * Prints the contents of a SCSI command via printk(). | |
2942 | */ | |
2943 | ||
2944 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2945 | struct scsi_cmnd *cmd) | |
2946 | { | |
2947 | #ifdef ATA_DEBUG | |
2948 | struct scsi_device *scsidev = cmd->device; | |
2949 | u8 *scsicmd = cmd->cmnd; | |
2950 | ||
2951 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 2952 | ap->print_id, |
1da177e4 LT |
2953 | scsidev->channel, scsidev->id, scsidev->lun, |
2954 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2955 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2956 | scsicmd[8]); | |
2957 | #endif | |
2958 | } | |
2959 | ||
542b1444 | 2960 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2961 | void (*done)(struct scsi_cmnd *), |
2962 | struct ata_device *dev) | |
eb3f0f9c | 2963 | { |
baf4fdfa ML |
2964 | u8 scsi_op = scmd->cmnd[0]; |
2965 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
2966 | int rc = 0; |
2967 | ||
eb3f0f9c | 2968 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
2969 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
2970 | goto bad_cdb_len; | |
eb3f0f9c | 2971 | |
baf4fdfa ML |
2972 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
2973 | } else { | |
2974 | if (unlikely(!scmd->cmd_len)) | |
2975 | goto bad_cdb_len; | |
2976 | ||
2977 | xlat_func = NULL; | |
2978 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
2979 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
2980 | int len = COMMAND_SIZE(scsi_op); |
2981 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
2982 | goto bad_cdb_len; |
2983 | ||
2984 | xlat_func = atapi_xlat; | |
2985 | } else { | |
2986 | /* ATA_16 passthru, treat as an ATA command */ | |
2987 | if (unlikely(scmd->cmd_len > 16)) | |
2988 | goto bad_cdb_len; | |
2989 | ||
2990 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
2991 | } | |
2992 | } | |
2993 | ||
2994 | if (xlat_func) | |
2995 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
2996 | else | |
2997 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
2998 | |
2999 | return rc; | |
baf4fdfa ML |
3000 | |
3001 | bad_cdb_len: | |
3002 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
3003 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
3004 | scmd->result = DID_ERROR << 16; | |
3005 | done(scmd); | |
3006 | return 0; | |
eb3f0f9c BK |
3007 | } |
3008 | ||
1da177e4 LT |
3009 | /** |
3010 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
3011 | * @cmd: SCSI command to be sent | |
3012 | * @done: Completion function, called when command is complete | |
3013 | * | |
3014 | * In some cases, this function translates SCSI commands into | |
3015 | * ATA taskfiles, and queues the taskfiles to be sent to | |
3016 | * hardware. In other cases, this function simulates a | |
3017 | * SCSI device by evaluating and responding to certain | |
3018 | * SCSI commands. This creates the overall effect of | |
3019 | * ATA and ATAPI devices appearing as SCSI devices. | |
3020 | * | |
3021 | * LOCKING: | |
cca3974e | 3022 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
3023 | * |
3024 | * RETURNS: | |
2115ea94 TH |
3025 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3026 | * 0 otherwise. | |
1da177e4 | 3027 | */ |
1da177e4 LT |
3028 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
3029 | { | |
3030 | struct ata_port *ap; | |
3031 | struct ata_device *dev; | |
3032 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 3033 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 3034 | int rc = 0; |
1da177e4 | 3035 | |
35bb94b1 | 3036 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
3037 | |
3038 | spin_unlock(shost->host_lock); | |
ba6a1308 | 3039 | spin_lock(ap->lock); |
1da177e4 LT |
3040 | |
3041 | ata_scsi_dump_cdb(ap, cmd); | |
3042 | ||
3043 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 3044 | if (likely(dev)) |
2115ea94 | 3045 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 3046 | else { |
1da177e4 LT |
3047 | cmd->result = (DID_BAD_TARGET << 16); |
3048 | done(cmd); | |
1da177e4 LT |
3049 | } |
3050 | ||
ba6a1308 | 3051 | spin_unlock(ap->lock); |
005a5a06 | 3052 | spin_lock(shost->host_lock); |
2115ea94 | 3053 | return rc; |
1da177e4 LT |
3054 | } |
3055 | ||
3056 | /** | |
3057 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 3058 | * @dev: the target device |
1da177e4 LT |
3059 | * @cmd: SCSI command being sent to device. |
3060 | * @done: SCSI command completion function. | |
3061 | * | |
3062 | * Interprets and directly executes a select list of SCSI commands | |
3063 | * that can be handled internally. | |
3064 | * | |
3065 | * LOCKING: | |
cca3974e | 3066 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3067 | */ |
3068 | ||
3373efd8 | 3069 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
3070 | void (*done)(struct scsi_cmnd *)) |
3071 | { | |
3072 | struct ata_scsi_args args; | |
057ace5e | 3073 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 3074 | u8 tmp8; |
1da177e4 | 3075 | |
9a3dccc4 TH |
3076 | args.dev = dev; |
3077 | args.id = dev->id; | |
1da177e4 LT |
3078 | args.cmd = cmd; |
3079 | args.done = done; | |
3080 | ||
3081 | switch(scsicmd[0]) { | |
2dcb407e JG |
3082 | /* TODO: worth improving? */ |
3083 | case FORMAT_UNIT: | |
3084 | ata_scsi_invalid_field(cmd, done); | |
3085 | break; | |
3086 | ||
3087 | case INQUIRY: | |
3088 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 3089 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
3090 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3091 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3092 | else switch (scsicmd[2]) { | |
3093 | case 0x00: | |
3094 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3095 | break; |
2dcb407e JG |
3096 | case 0x80: |
3097 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3098 | break; |
2dcb407e JG |
3099 | case 0x83: |
3100 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3101 | break; |
2dcb407e JG |
3102 | case 0x89: |
3103 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3104 | break; | |
3105 | default: | |
ae006510 | 3106 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 3107 | break; |
2dcb407e JG |
3108 | } |
3109 | break; | |
3110 | ||
3111 | case MODE_SENSE: | |
3112 | case MODE_SENSE_10: | |
3113 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3114 | break; | |
3115 | ||
3116 | case MODE_SELECT: /* unconditionally return */ | |
3117 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3118 | ata_scsi_invalid_field(cmd, done); | |
3119 | break; | |
1da177e4 | 3120 | |
2dcb407e JG |
3121 | case READ_CAPACITY: |
3122 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3123 | break; | |
3124 | ||
3125 | case SERVICE_ACTION_IN: | |
3126 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3127 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3128 | else |
3129 | ata_scsi_invalid_field(cmd, done); | |
3130 | break; | |
1da177e4 | 3131 | |
2dcb407e JG |
3132 | case REPORT_LUNS: |
3133 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3134 | break; | |
1da177e4 | 3135 | |
2dcb407e JG |
3136 | case REQUEST_SENSE: |
3137 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3138 | cmd->result = (DRIVER_SENSE << 24); | |
3139 | done(cmd); | |
3140 | break; | |
1da177e4 | 3141 | |
2dcb407e JG |
3142 | /* if we reach this, then writeback caching is disabled, |
3143 | * turning this into a no-op. | |
3144 | */ | |
3145 | case SYNCHRONIZE_CACHE: | |
3146 | /* fall through */ | |
3147 | ||
3148 | /* no-op's, complete with success */ | |
3149 | case REZERO_UNIT: | |
3150 | case SEEK_6: | |
3151 | case SEEK_10: | |
3152 | case TEST_UNIT_READY: | |
3153 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3154 | break; | |
45394145 | 3155 | |
2dcb407e JG |
3156 | case SEND_DIAGNOSTIC: |
3157 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3158 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3159 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3160 | else |
3161 | ata_scsi_invalid_field(cmd, done); | |
3162 | break; | |
1da177e4 | 3163 | |
2dcb407e JG |
3164 | /* all other commands */ |
3165 | default: | |
3166 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3167 | /* "Invalid command operation code" */ | |
3168 | done(cmd); | |
3169 | break; | |
1da177e4 LT |
3170 | } |
3171 | } | |
3172 | ||
f3187195 TH |
3173 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3174 | { | |
3175 | int i, rc; | |
3176 | ||
3177 | for (i = 0; i < host->n_ports; i++) { | |
3178 | struct ata_port *ap = host->ports[i]; | |
3179 | struct Scsi_Host *shost; | |
3180 | ||
3181 | rc = -ENOMEM; | |
3182 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3183 | if (!shost) | |
3184 | goto err_alloc; | |
3185 | ||
3186 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3187 | ap->scsi_host = shost; | |
3188 | ||
3189 | shost->transportt = &ata_scsi_transport_template; | |
3190 | shost->unique_id = ap->print_id; | |
3191 | shost->max_id = 16; | |
3192 | shost->max_lun = 1; | |
3193 | shost->max_channel = 1; | |
3194 | shost->max_cmd_len = 16; | |
3195 | ||
31cc23b3 TH |
3196 | /* Schedule policy is determined by ->qc_defer() |
3197 | * callback and it needs to see every deferred qc. | |
3198 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3199 | * automatically deferring requests. | |
3200 | */ | |
3201 | shost->max_host_blocked = 1; | |
3202 | ||
f3187195 TH |
3203 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3204 | if (rc) | |
3205 | goto err_add; | |
3206 | } | |
3207 | ||
3208 | return 0; | |
3209 | ||
3210 | err_add: | |
3211 | scsi_host_put(host->ports[i]->scsi_host); | |
3212 | err_alloc: | |
3213 | while (--i >= 0) { | |
3214 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3215 | ||
3216 | scsi_remove_host(shost); | |
3217 | scsi_host_put(shost); | |
3218 | } | |
3219 | return rc; | |
3220 | } | |
3221 | ||
1ae46317 | 3222 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3223 | { |
1ae46317 TH |
3224 | int tries = 5; |
3225 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3226 | struct ata_link *link; |
1ae46317 | 3227 | struct ata_device *dev; |
644dd0cc | 3228 | |
198e0fed | 3229 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3230 | return; |
3231 | ||
1ae46317 | 3232 | repeat: |
41bda9c9 TH |
3233 | ata_port_for_each_link(link, ap) { |
3234 | ata_link_for_each_dev(dev, link) { | |
3235 | struct scsi_device *sdev; | |
3236 | int channel = 0, id = 0; | |
3edebac4 | 3237 | |
41bda9c9 TH |
3238 | if (!ata_dev_enabled(dev) || dev->sdev) |
3239 | continue; | |
3f19ee8c | 3240 | |
41bda9c9 TH |
3241 | if (ata_is_host_link(link)) |
3242 | id = dev->devno; | |
3243 | else | |
3244 | channel = link->pmp; | |
3245 | ||
3246 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3247 | NULL); | |
3248 | if (!IS_ERR(sdev)) { | |
3249 | dev->sdev = sdev; | |
3250 | scsi_device_put(sdev); | |
3251 | } | |
3edebac4 | 3252 | } |
3f19ee8c | 3253 | } |
1ae46317 TH |
3254 | |
3255 | /* If we scanned while EH was in progress or allocation | |
3256 | * failure occurred, scan would have failed silently. Check | |
3257 | * whether all devices are attached. | |
3258 | */ | |
41bda9c9 TH |
3259 | ata_port_for_each_link(link, ap) { |
3260 | ata_link_for_each_dev(dev, link) { | |
3261 | if (ata_dev_enabled(dev) && !dev->sdev) | |
3262 | goto exit_loop; | |
3263 | } | |
1ae46317 | 3264 | } |
41bda9c9 TH |
3265 | exit_loop: |
3266 | if (!link) | |
1ae46317 TH |
3267 | return; |
3268 | ||
3269 | /* we're missing some SCSI devices */ | |
3270 | if (sync) { | |
3271 | /* If caller requested synchrnous scan && we've made | |
3272 | * any progress, sleep briefly and repeat. | |
3273 | */ | |
3274 | if (dev != last_failed_dev) { | |
3275 | msleep(100); | |
3276 | last_failed_dev = dev; | |
3277 | goto repeat; | |
3278 | } | |
3279 | ||
3280 | /* We might be failing to detect boot device, give it | |
3281 | * a few more chances. | |
3282 | */ | |
3283 | if (--tries) { | |
3284 | msleep(100); | |
3285 | goto repeat; | |
3286 | } | |
3287 | ||
3288 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3289 | "failed without making any progress,\n" | |
3290 | " switching to async\n"); | |
3291 | } | |
3292 | ||
3293 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3294 | round_jiffies_relative(HZ)); | |
644dd0cc | 3295 | } |
0ea035a3 TH |
3296 | |
3297 | /** | |
3298 | * ata_scsi_offline_dev - offline attached SCSI device | |
3299 | * @dev: ATA device to offline attached SCSI device for | |
3300 | * | |
3301 | * This function is called from ata_eh_hotplug() and responsible | |
3302 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3303 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3304 | * against clearing. |
3305 | * | |
3306 | * LOCKING: | |
cca3974e | 3307 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3308 | * |
3309 | * RETURNS: | |
3310 | * 1 if attached SCSI device exists, 0 otherwise. | |
3311 | */ | |
3312 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3313 | { | |
3314 | if (dev->sdev) { | |
3315 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3316 | return 1; | |
3317 | } | |
3318 | return 0; | |
3319 | } | |
580b2102 TH |
3320 | |
3321 | /** | |
3322 | * ata_scsi_remove_dev - remove attached SCSI device | |
3323 | * @dev: ATA device to remove attached SCSI device for | |
3324 | * | |
3325 | * This function is called from ata_eh_scsi_hotplug() and | |
3326 | * responsible for removing the SCSI device attached to @dev. | |
3327 | * | |
3328 | * LOCKING: | |
3329 | * Kernel thread context (may sleep). | |
3330 | */ | |
3331 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3332 | { | |
9af5c9c9 | 3333 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3334 | struct scsi_device *sdev; |
3335 | unsigned long flags; | |
3336 | ||
3337 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3338 | * state doesn't change underneath us and thus | |
3339 | * scsi_device_get() always succeeds. The mutex locking can | |
3340 | * be removed if there is __scsi_device_get() interface which | |
3341 | * increments reference counts regardless of device state. | |
3342 | */ | |
cca3974e | 3343 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3344 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3345 | |
cca3974e | 3346 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3347 | sdev = dev->sdev; |
3348 | dev->sdev = NULL; | |
3349 | ||
3350 | if (sdev) { | |
3351 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3352 | * away underneath us after the host lock and |
580b2102 TH |
3353 | * scan_mutex are released. Hold onto it. |
3354 | */ | |
3355 | if (scsi_device_get(sdev) == 0) { | |
3356 | /* The following ensures the attached sdev is | |
3357 | * offline on return from ata_scsi_offline_dev() | |
3358 | * regardless it wins or loses the race | |
3359 | * against this function. | |
3360 | */ | |
3361 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3362 | } else { | |
3363 | WARN_ON(1); | |
3364 | sdev = NULL; | |
3365 | } | |
3366 | } | |
3367 | ||
ba6a1308 | 3368 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3369 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3370 | |
3371 | if (sdev) { | |
3372 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3373 | sdev->sdev_gendev.bus_id); | |
3374 | ||
3375 | scsi_remove_device(sdev); | |
3376 | scsi_device_put(sdev); | |
3377 | } | |
3378 | } | |
3379 | ||
41bda9c9 TH |
3380 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3381 | { | |
3382 | struct ata_port *ap = link->ap; | |
3383 | struct ata_device *dev; | |
3384 | ||
3385 | ata_link_for_each_dev(dev, link) { | |
3386 | unsigned long flags; | |
3387 | ||
3388 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3389 | continue; | |
3390 | ||
3391 | spin_lock_irqsave(ap->lock, flags); | |
3392 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3393 | spin_unlock_irqrestore(ap->lock, flags); | |
3394 | ||
3395 | ata_scsi_remove_dev(dev); | |
3396 | } | |
3397 | } | |
3398 | ||
2f294968 KCA |
3399 | /** |
3400 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3401 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3402 | * |
3403 | * Tell the block layer to send a media change notification | |
3404 | * event. | |
3405 | * | |
3406 | * LOCKING: | |
854c73a2 | 3407 | * spin_lock_irqsave(host lock) |
2f294968 | 3408 | */ |
854c73a2 | 3409 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3410 | { |
854c73a2 | 3411 | if (dev->sdev) |
f26792d5 JG |
3412 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3413 | GFP_ATOMIC); | |
2f294968 | 3414 | } |
2f294968 | 3415 | |
580b2102 TH |
3416 | /** |
3417 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3418 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3419 | * |
3420 | * Perform SCSI part of hotplug. It's executed from a separate | |
3421 | * workqueue after EH completes. This is necessary because SCSI | |
3422 | * hot plugging requires working EH and hot unplugging is | |
3423 | * synchronized with hot plugging with a mutex. | |
3424 | * | |
3425 | * LOCKING: | |
3426 | * Kernel thread context (may sleep). | |
3427 | */ | |
65f27f38 | 3428 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3429 | { |
65f27f38 DH |
3430 | struct ata_port *ap = |
3431 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3432 | int i; |
580b2102 | 3433 | |
b51e9e5d | 3434 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3435 | DPRINTK("ENTER/EXIT - unloading\n"); |
3436 | return; | |
3437 | } | |
3438 | ||
3439 | DPRINTK("ENTER\n"); | |
3440 | ||
41bda9c9 TH |
3441 | /* Unplug detached devices. We cannot use link iterator here |
3442 | * because PMP links have to be scanned even if PMP is | |
3443 | * currently not attached. Iterate manually. | |
3444 | */ | |
3445 | ata_scsi_handle_link_detach(&ap->link); | |
3446 | if (ap->pmp_link) | |
3447 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3448 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3449 | |
3450 | /* scan for new ones */ | |
1ae46317 | 3451 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3452 | |
3453 | DPRINTK("EXIT\n"); | |
3454 | } | |
83c47bcb TH |
3455 | |
3456 | /** | |
3457 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3458 | * @shost: SCSI host to scan | |
3459 | * @channel: Channel to scan | |
3460 | * @id: ID to scan | |
3461 | * @lun: LUN to scan | |
3462 | * | |
3463 | * This function is called when user explicitly requests bus | |
3464 | * scan. Set probe pending flag and invoke EH. | |
3465 | * | |
3466 | * LOCKING: | |
3467 | * SCSI layer (we don't care) | |
3468 | * | |
3469 | * RETURNS: | |
3470 | * Zero. | |
3471 | */ | |
3472 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3473 | unsigned int id, unsigned int lun) | |
3474 | { | |
3475 | struct ata_port *ap = ata_shost_to_port(shost); | |
3476 | unsigned long flags; | |
41bda9c9 | 3477 | int devno, rc = 0; |
83c47bcb TH |
3478 | |
3479 | if (!ap->ops->error_handler) | |
3480 | return -EOPNOTSUPP; | |
3481 | ||
41bda9c9 | 3482 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3483 | return -EINVAL; |
3484 | ||
41bda9c9 TH |
3485 | if (ap->nr_pmp_links == 0) { |
3486 | if (channel != SCAN_WILD_CARD && channel) | |
3487 | return -EINVAL; | |
3488 | devno = id; | |
3489 | } else { | |
3490 | if (id != SCAN_WILD_CARD && id) | |
3491 | return -EINVAL; | |
3492 | devno = channel; | |
3493 | } | |
3494 | ||
ba6a1308 | 3495 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3496 | |
41bda9c9 TH |
3497 | if (devno == SCAN_WILD_CARD) { |
3498 | struct ata_link *link; | |
3499 | ||
3500 | ata_port_for_each_link(link, ap) { | |
3501 | struct ata_eh_info *ehi = &link->eh_info; | |
3502 | ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1; | |
3503 | ehi->action |= ATA_EH_SOFTRESET; | |
3504 | } | |
83c47bcb | 3505 | } else { |
41bda9c9 | 3506 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3507 | |
3508 | if (dev) { | |
41bda9c9 | 3509 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 TH |
3510 | ehi->probe_mask |= 1 << dev->devno; |
3511 | ehi->action |= ATA_EH_SOFTRESET; | |
3512 | ehi->flags |= ATA_EHI_RESUME_LINK; | |
83c47bcb TH |
3513 | } else |
3514 | rc = -EINVAL; | |
3515 | } | |
3516 | ||
309afcb5 | 3517 | if (rc == 0) { |
83c47bcb | 3518 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3519 | spin_unlock_irqrestore(ap->lock, flags); |
3520 | ata_port_wait_eh(ap); | |
3521 | } else | |
3522 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3523 | |
3524 | return rc; | |
3525 | } | |
3057ac3c | 3526 | |
3527 | /** | |
d0171269 | 3528 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3529 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3530 | * |
d0171269 TH |
3531 | * After ATA pass thru (SAT) commands are executed successfully, |
3532 | * libata need to propagate the changes to SCSI layer. This | |
3533 | * function must be executed from ata_aux_wq such that sdev | |
3534 | * attach/detach don't race with rescan. | |
3057ac3c | 3535 | * |
d0171269 TH |
3536 | * LOCKING: |
3537 | * Kernel thread context (may sleep). | |
3057ac3c | 3538 | */ |
65f27f38 | 3539 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3540 | { |
65f27f38 DH |
3541 | struct ata_port *ap = |
3542 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3543 | struct ata_link *link; |
f58229f8 | 3544 | struct ata_device *dev; |
f84e7e41 | 3545 | unsigned long flags; |
3057ac3c | 3546 | |
f84e7e41 TH |
3547 | spin_lock_irqsave(ap->lock, flags); |
3548 | ||
41bda9c9 TH |
3549 | ata_port_for_each_link(link, ap) { |
3550 | ata_link_for_each_dev(dev, link) { | |
3551 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3552 | |
41bda9c9 TH |
3553 | if (!ata_dev_enabled(dev) || !sdev) |
3554 | continue; | |
3555 | if (scsi_device_get(sdev)) | |
3556 | continue; | |
f84e7e41 | 3557 | |
41bda9c9 TH |
3558 | spin_unlock_irqrestore(ap->lock, flags); |
3559 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3560 | scsi_device_put(sdev); | |
3561 | spin_lock_irqsave(ap->lock, flags); | |
3562 | } | |
3057ac3c | 3563 | } |
f84e7e41 TH |
3564 | |
3565 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3566 | } |
80289167 BK |
3567 | |
3568 | /** | |
3569 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3570 | * @host: ATA host container for all SAS ports |
80289167 | 3571 | * @port_info: Information from low-level host driver |
cca3974e | 3572 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3573 | * |
3574 | * LOCKING: | |
3575 | * PCI/etc. bus probe sem. | |
3576 | * | |
3577 | * RETURNS: | |
3578 | * ata_port pointer on success / NULL on failure. | |
3579 | */ | |
3580 | ||
cca3974e | 3581 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3582 | struct ata_port_info *port_info, |
cca3974e | 3583 | struct Scsi_Host *shost) |
80289167 | 3584 | { |
f3187195 | 3585 | struct ata_port *ap; |
80289167 | 3586 | |
f3187195 | 3587 | ap = ata_port_alloc(host); |
80289167 BK |
3588 | if (!ap) |
3589 | return NULL; | |
3590 | ||
f3187195 | 3591 | ap->port_no = 0; |
cca3974e | 3592 | ap->lock = shost->host_lock; |
f3187195 TH |
3593 | ap->pio_mask = port_info->pio_mask; |
3594 | ap->mwdma_mask = port_info->mwdma_mask; | |
3595 | ap->udma_mask = port_info->udma_mask; | |
3596 | ap->flags |= port_info->flags; | |
3597 | ap->ops = port_info->port_ops; | |
3598 | ap->cbl = ATA_CBL_SATA; | |
3599 | ||
80289167 BK |
3600 | return ap; |
3601 | } | |
3602 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3603 | ||
3604 | /** | |
3605 | * ata_sas_port_start - Set port up for dma. | |
3606 | * @ap: Port to initialize | |
3607 | * | |
3608 | * Called just after data structures for each port are | |
dde20207 | 3609 | * initialized. |
80289167 BK |
3610 | * |
3611 | * May be used as the port_start() entry in ata_port_operations. | |
3612 | * | |
3613 | * LOCKING: | |
3614 | * Inherited from caller. | |
3615 | */ | |
3616 | int ata_sas_port_start(struct ata_port *ap) | |
3617 | { | |
dde20207 | 3618 | return 0; |
80289167 BK |
3619 | } |
3620 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3621 | ||
3622 | /** | |
3623 | * ata_port_stop - Undo ata_sas_port_start() | |
3624 | * @ap: Port to shut down | |
3625 | * | |
80289167 BK |
3626 | * May be used as the port_stop() entry in ata_port_operations. |
3627 | * | |
3628 | * LOCKING: | |
3629 | * Inherited from caller. | |
3630 | */ | |
3631 | ||
3632 | void ata_sas_port_stop(struct ata_port *ap) | |
3633 | { | |
80289167 BK |
3634 | } |
3635 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3636 | ||
3637 | /** | |
3638 | * ata_sas_port_init - Initialize a SATA device | |
3639 | * @ap: SATA port to initialize | |
3640 | * | |
3641 | * LOCKING: | |
3642 | * PCI/etc. bus probe sem. | |
3643 | * | |
3644 | * RETURNS: | |
3645 | * Zero on success, non-zero on error. | |
3646 | */ | |
3647 | ||
3648 | int ata_sas_port_init(struct ata_port *ap) | |
3649 | { | |
3650 | int rc = ap->ops->port_start(ap); | |
3651 | ||
f3187195 TH |
3652 | if (!rc) { |
3653 | ap->print_id = ata_print_id++; | |
80289167 | 3654 | rc = ata_bus_probe(ap); |
f3187195 | 3655 | } |
80289167 BK |
3656 | |
3657 | return rc; | |
3658 | } | |
3659 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3660 | ||
3661 | /** | |
3662 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3663 | * @ap: SATA port to destroy | |
3664 | * | |
3665 | */ | |
3666 | ||
3667 | void ata_sas_port_destroy(struct ata_port *ap) | |
3668 | { | |
f0d36efd TH |
3669 | if (ap->ops->port_stop) |
3670 | ap->ops->port_stop(ap); | |
80289167 BK |
3671 | kfree(ap); |
3672 | } | |
3673 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3674 | ||
3675 | /** | |
3676 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3677 | * @sdev: SCSI device to configure | |
3678 | * @ap: ATA port to which SCSI device is attached | |
3679 | * | |
3680 | * RETURNS: | |
3681 | * Zero. | |
3682 | */ | |
3683 | ||
3684 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3685 | { | |
3686 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3687 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3688 | return 0; |
3689 | } | |
3690 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3691 | ||
3692 | /** | |
3693 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3694 | * @cmd: SCSI command to be sent | |
3695 | * @done: Completion function, called when command is complete | |
3696 | * @ap: ATA port to which the command is being sent | |
3697 | * | |
3698 | * RETURNS: | |
08475a19 BK |
3699 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3700 | * 0 otherwise. | |
80289167 BK |
3701 | */ |
3702 | ||
3703 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3704 | struct ata_port *ap) | |
3705 | { | |
08475a19 BK |
3706 | int rc = 0; |
3707 | ||
80289167 BK |
3708 | ata_scsi_dump_cdb(ap, cmd); |
3709 | ||
9af5c9c9 TH |
3710 | if (likely(ata_scsi_dev_enabled(ap->link.device))) |
3711 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); | |
80289167 BK |
3712 | else { |
3713 | cmd->result = (DID_BAD_TARGET << 16); | |
3714 | done(cmd); | |
3715 | } | |
08475a19 | 3716 | return rc; |
80289167 BK |
3717 | } |
3718 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |