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