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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 | ||
ee959b00 TJ |
134 | static ssize_t ata_scsi_lpm_put(struct device *dev, |
135 | struct device_attribute *attr, | |
136 | const char *buf, size_t count) | |
ca77329f | 137 | { |
ee959b00 | 138 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
139 | struct ata_port *ap = ata_shost_to_port(shost); |
140 | enum link_pm policy = 0; | |
141 | int i; | |
142 | ||
143 | /* | |
144 | * we are skipping array location 0 on purpose - this | |
145 | * is because a value of NOT_AVAILABLE is displayed | |
146 | * to the user as max_performance, but when the user | |
147 | * writes "max_performance", they actually want the | |
148 | * value to match MAX_PERFORMANCE. | |
149 | */ | |
150 | for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) { | |
151 | const int len = strlen(link_pm_policy[i].name); | |
152 | if (strncmp(link_pm_policy[i].name, buf, len) == 0 && | |
153 | buf[len] == '\n') { | |
154 | policy = link_pm_policy[i].value; | |
155 | break; | |
156 | } | |
157 | } | |
158 | if (!policy) | |
159 | return -EINVAL; | |
160 | ||
161 | ata_lpm_schedule(ap, policy); | |
162 | return count; | |
163 | } | |
164 | ||
165 | static ssize_t | |
ee959b00 | 166 | ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf) |
ca77329f | 167 | { |
ee959b00 | 168 | struct Scsi_Host *shost = class_to_shost(dev); |
ca77329f KCA |
169 | struct ata_port *ap = ata_shost_to_port(shost); |
170 | const char *policy = | |
171 | ata_scsi_lpm_get(ap->pm_policy); | |
172 | ||
173 | if (!policy) | |
174 | return -EINVAL; | |
175 | ||
176 | return snprintf(buf, 23, "%s\n", policy); | |
177 | } | |
ee959b00 | 178 | DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, |
ca77329f | 179 | ata_scsi_lpm_show, ata_scsi_lpm_put); |
ee959b00 | 180 | EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); |
ca77329f | 181 | |
ae006510 DG |
182 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
183 | void (*done)(struct scsi_cmnd *)) | |
184 | { | |
185 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
186 | /* "Invalid field in cbd" */ | |
187 | done(cmd); | |
188 | } | |
189 | ||
1da177e4 LT |
190 | /** |
191 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
192 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
193 | * @bdev: block device associated with @sdev | |
194 | * @capacity: capacity of SCSI device | |
195 | * @geom: location to which geometry will be output | |
196 | * | |
197 | * Generic bios head/sector/cylinder calculator | |
198 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
199 | * mapping. Some situations may arise where the disk is not | |
200 | * bootable if this is not used. | |
201 | * | |
202 | * LOCKING: | |
203 | * Defined by the SCSI layer. We don't really care. | |
204 | * | |
205 | * RETURNS: | |
206 | * Zero. | |
207 | */ | |
208 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
209 | sector_t capacity, int geom[]) | |
210 | { | |
211 | geom[0] = 255; | |
212 | geom[1] = 63; | |
213 | sector_div(capacity, 255*63); | |
214 | geom[2] = capacity; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
5924b74c TH |
219 | /** |
220 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
221 | * @sdev: SCSI device to get identify data for | |
222 | * @arg: User buffer area for identify data | |
223 | * | |
224 | * LOCKING: | |
225 | * Defined by the SCSI layer. We don't really care. | |
226 | * | |
227 | * RETURNS: | |
228 | * Zero on success, negative errno on error. | |
229 | */ | |
230 | static int ata_get_identity(struct scsi_device *sdev, void __user *arg) | |
231 | { | |
232 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
233 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
234 | u16 __user *dst = arg; | |
235 | char buf[40]; | |
236 | ||
237 | if (!dev) | |
238 | return -ENOMSG; | |
239 | ||
240 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
241 | return -EFAULT; | |
242 | ||
243 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
244 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
245 | return -EFAULT; | |
246 | ||
247 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
248 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
249 | return -EFAULT; | |
250 | ||
251 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
252 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
253 | return -EFAULT; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
b095518e JG |
258 | /** |
259 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 260 | * @scsidev: Device to which we are issuing command |
b095518e JG |
261 | * @arg: User provided data for issuing command |
262 | * | |
263 | * LOCKING: | |
264 | * Defined by the SCSI layer. We don't really care. | |
265 | * | |
266 | * RETURNS: | |
267 | * Zero on success, negative errno on error. | |
268 | */ | |
b095518e JG |
269 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
270 | { | |
271 | int rc = 0; | |
272 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 273 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 274 | int argsize = 0; |
85837ebd | 275 | enum dma_data_direction data_dir; |
bbe1fe7e | 276 | int cmd_result; |
b095518e | 277 | |
c893a3ae | 278 | if (arg == NULL) |
b095518e JG |
279 | return -EINVAL; |
280 | ||
281 | if (copy_from_user(args, arg, sizeof(args))) | |
282 | return -EFAULT; | |
283 | ||
bbe1fe7e ET |
284 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
285 | if (!sensebuf) | |
286 | return -ENOMEM; | |
287 | ||
b095518e JG |
288 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
289 | ||
290 | if (args[3]) { | |
291 | argsize = SECTOR_SIZE * args[3]; | |
292 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
293 | if (argbuf == NULL) { |
294 | rc = -ENOMEM; | |
295 | goto error; | |
296 | } | |
b095518e JG |
297 | |
298 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
299 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
2dcb407e | 300 | block count in sector count field */ |
85837ebd | 301 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
302 | } else { |
303 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 304 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 305 | data_dir = DMA_NONE; |
b095518e JG |
306 | } |
307 | ||
308 | scsi_cmd[0] = ATA_16; | |
309 | ||
310 | scsi_cmd[4] = args[2]; | |
311 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
312 | scsi_cmd[6] = args[3]; | |
313 | scsi_cmd[8] = args[1]; | |
314 | scsi_cmd[10] = 0x4f; | |
315 | scsi_cmd[12] = 0xc2; | |
316 | } else { | |
317 | scsi_cmd[6] = args[1]; | |
318 | } | |
319 | scsi_cmd[14] = args[0]; | |
320 | ||
321 | /* Good values for timeout and retries? Values below | |
322 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e | 323 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
2dcb407e | 324 | sensebuf, (10*HZ), 5, 0); |
bbe1fe7e ET |
325 | |
326 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
327 | u8 *desc = sensebuf + 8; | |
328 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
329 | ||
330 | /* If we set cc then ATA pass-through will cause a | |
331 | * check condition even if no error. Filter that. */ | |
332 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
333 | struct scsi_sense_hdr sshdr; | |
334 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
2dcb407e JG |
335 | &sshdr); |
336 | if (sshdr.sense_key == 0 && | |
337 | sshdr.asc == 0 && sshdr.ascq == 0) | |
bbe1fe7e ET |
338 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
339 | } | |
340 | ||
341 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
2dcb407e JG |
342 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ |
343 | desc[0] == 0x09) { /* code is "ATA Descriptor" */ | |
344 | args[0] = desc[13]; /* status */ | |
345 | args[1] = desc[3]; /* error */ | |
346 | args[2] = desc[5]; /* sector count (0:7) */ | |
bbe1fe7e ET |
347 | if (copy_to_user(arg, args, sizeof(args))) |
348 | rc = -EFAULT; | |
349 | } | |
350 | } | |
351 | ||
352 | ||
353 | if (cmd_result) { | |
b095518e JG |
354 | rc = -EIO; |
355 | goto error; | |
356 | } | |
357 | ||
b095518e | 358 | if ((argbuf) |
c893a3ae | 359 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
360 | rc = -EFAULT; |
361 | error: | |
bbe1fe7e | 362 | kfree(sensebuf); |
8f760780 | 363 | kfree(argbuf); |
b095518e JG |
364 | return rc; |
365 | } | |
366 | ||
367 | /** | |
368 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 369 | * @scsidev: Device to which we are issuing command |
b095518e JG |
370 | * @arg: User provided data for issuing command |
371 | * | |
372 | * LOCKING: | |
373 | * Defined by the SCSI layer. We don't really care. | |
374 | * | |
375 | * RETURNS: | |
376 | * Zero on success, negative errno on error. | |
377 | */ | |
378 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
379 | { | |
380 | int rc = 0; | |
381 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
382 | u8 args[7], *sensebuf = NULL; |
383 | int cmd_result; | |
b095518e | 384 | |
c893a3ae | 385 | if (arg == NULL) |
b095518e JG |
386 | return -EINVAL; |
387 | ||
388 | if (copy_from_user(args, arg, sizeof(args))) | |
389 | return -EFAULT; | |
390 | ||
af068bd1 DM |
391 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
392 | if (!sensebuf) | |
393 | return -ENOMEM; | |
394 | ||
b095518e JG |
395 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
396 | scsi_cmd[0] = ATA_16; | |
397 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 398 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
399 | scsi_cmd[4] = args[1]; |
400 | scsi_cmd[6] = args[2]; | |
401 | scsi_cmd[8] = args[3]; | |
402 | scsi_cmd[10] = args[4]; | |
403 | scsi_cmd[12] = args[5]; | |
277239f2 | 404 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
405 | scsi_cmd[14] = args[0]; |
406 | ||
b095518e | 407 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 408 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 DM |
409 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
410 | sensebuf, (10*HZ), 5, 0); | |
411 | ||
412 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
413 | u8 *desc = sensebuf + 8; | |
414 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
415 | ||
416 | /* If we set cc then ATA pass-through will cause a | |
417 | * check condition even if no error. Filter that. */ | |
418 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
419 | struct scsi_sense_hdr sshdr; | |
420 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
421 | &sshdr); | |
2dcb407e JG |
422 | if (sshdr.sense_key == 0 && |
423 | sshdr.asc == 0 && sshdr.ascq == 0) | |
af068bd1 DM |
424 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; |
425 | } | |
426 | ||
427 | /* Send userspace ATA registers */ | |
428 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
429 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
430 | args[0] = desc[13]; /* status */ | |
431 | args[1] = desc[3]; /* error */ | |
432 | args[2] = desc[5]; /* sector count (0:7) */ | |
433 | args[3] = desc[7]; /* lbal */ | |
434 | args[4] = desc[9]; /* lbam */ | |
435 | args[5] = desc[11]; /* lbah */ | |
436 | args[6] = desc[12]; /* select */ | |
437 | if (copy_to_user(arg, args, sizeof(args))) | |
438 | rc = -EFAULT; | |
439 | } | |
440 | } | |
441 | ||
442 | if (cmd_result) { | |
b095518e | 443 | rc = -EIO; |
af068bd1 DM |
444 | goto error; |
445 | } | |
b095518e | 446 | |
af068bd1 DM |
447 | error: |
448 | kfree(sensebuf); | |
b095518e JG |
449 | return rc; |
450 | } | |
451 | ||
1da177e4 LT |
452 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
453 | { | |
1da177e4 LT |
454 | int val = -EINVAL, rc = -EINVAL; |
455 | ||
1da177e4 LT |
456 | switch (cmd) { |
457 | case ATA_IOC_GET_IO32: | |
458 | val = 0; | |
459 | if (copy_to_user(arg, &val, 1)) | |
460 | return -EFAULT; | |
461 | return 0; | |
462 | ||
463 | case ATA_IOC_SET_IO32: | |
464 | val = (unsigned long) arg; | |
465 | if (val != 0) | |
466 | return -EINVAL; | |
467 | return 0; | |
468 | ||
5924b74c TH |
469 | case HDIO_GET_IDENTITY: |
470 | return ata_get_identity(scsidev, arg); | |
471 | ||
b095518e JG |
472 | case HDIO_DRIVE_CMD: |
473 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
474 | return -EACCES; | |
475 | return ata_cmd_ioctl(scsidev, arg); | |
476 | ||
477 | case HDIO_DRIVE_TASK: | |
478 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
479 | return -EACCES; | |
480 | return ata_task_ioctl(scsidev, arg); | |
481 | ||
1da177e4 LT |
482 | default: |
483 | rc = -ENOTTY; | |
484 | break; | |
485 | } | |
486 | ||
1da177e4 LT |
487 | return rc; |
488 | } | |
489 | ||
490 | /** | |
491 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
492 | * @dev: ATA device to which the new command is attached |
493 | * @cmd: SCSI command that originated this ATA command | |
494 | * @done: SCSI command completion function | |
495 | * | |
496 | * Obtain a reference to an unused ata_queued_cmd structure, | |
497 | * which is the basic libata structure representing a single | |
498 | * ATA command sent to the hardware. | |
499 | * | |
500 | * If a command was available, fill in the SCSI-specific | |
501 | * portions of the structure with information on the | |
502 | * current command. | |
503 | * | |
504 | * LOCKING: | |
cca3974e | 505 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
506 | * |
507 | * RETURNS: | |
508 | * Command allocated, or %NULL if none available. | |
509 | */ | |
7102d230 AB |
510 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
511 | struct scsi_cmnd *cmd, | |
512 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
513 | { |
514 | struct ata_queued_cmd *qc; | |
515 | ||
3373efd8 | 516 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
517 | if (qc) { |
518 | qc->scsicmd = cmd; | |
519 | qc->scsidone = done; | |
520 | ||
ff2aeb1e | 521 | qc->sg = scsi_sglist(cmd); |
7120165c | 522 | qc->n_elem = scsi_sg_count(cmd); |
1da177e4 LT |
523 | } else { |
524 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
525 | done(cmd); | |
526 | } | |
527 | ||
528 | return qc; | |
529 | } | |
530 | ||
aacda375 TH |
531 | static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) |
532 | { | |
533 | struct scsi_cmnd *scmd = qc->scsicmd; | |
534 | ||
535 | qc->extrabytes = scmd->request->extra_len; | |
536 | qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; | |
537 | } | |
538 | ||
b095518e JG |
539 | /** |
540 | * ata_dump_status - user friendly display of error info | |
541 | * @id: id of the port in question | |
542 | * @tf: ptr to filled out taskfile | |
543 | * | |
544 | * Decode and dump the ATA error/status registers for the user so | |
545 | * that they have some idea what really happened at the non | |
546 | * make-believe layer. | |
547 | * | |
548 | * LOCKING: | |
549 | * inherited from caller | |
550 | */ | |
7102d230 | 551 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
552 | { |
553 | u8 stat = tf->command, err = tf->feature; | |
554 | ||
555 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
556 | if (stat & ATA_BUSY) { | |
557 | printk("Busy }\n"); /* Data is not valid in this case */ | |
558 | } else { | |
559 | if (stat & 0x40) printk("DriveReady "); | |
560 | if (stat & 0x20) printk("DeviceFault "); | |
561 | if (stat & 0x10) printk("SeekComplete "); | |
562 | if (stat & 0x08) printk("DataRequest "); | |
563 | if (stat & 0x04) printk("CorrectedError "); | |
564 | if (stat & 0x02) printk("Index "); | |
565 | if (stat & 0x01) printk("Error "); | |
566 | printk("}\n"); | |
567 | ||
568 | if (err) { | |
569 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
570 | if (err & 0x04) printk("DriveStatusError "); | |
571 | if (err & 0x80) { | |
572 | if (err & 0x04) printk("BadCRC "); | |
573 | else printk("Sector "); | |
574 | } | |
575 | if (err & 0x40) printk("UncorrectableError "); | |
576 | if (err & 0x10) printk("SectorIdNotFound "); | |
577 | if (err & 0x02) printk("TrackZeroNotFound "); | |
578 | if (err & 0x01) printk("AddrMarkNotFound "); | |
579 | printk("}\n"); | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
1da177e4 LT |
584 | /** |
585 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 586 | * @id: ATA device number |
1da177e4 | 587 | * @drv_stat: value contained in ATA status register |
b095518e JG |
588 | * @drv_err: value contained in ATA error register |
589 | * @sk: the sense key we'll fill out | |
590 | * @asc: the additional sense code we'll fill out | |
591 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 592 | * @verbose: be verbose |
1da177e4 | 593 | * |
b095518e JG |
594 | * Converts an ATA error into a SCSI error. Fill out pointers to |
595 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
596 | * format sense blocks. | |
1da177e4 LT |
597 | * |
598 | * LOCKING: | |
cca3974e | 599 | * spin_lock_irqsave(host lock) |
1da177e4 | 600 | */ |
7102d230 AB |
601 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
602 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 603 | { |
b095518e | 604 | int i; |
ffe75ef6 | 605 | |
1da177e4 | 606 | /* Based on the 3ware driver translation table */ |
98ac62de | 607 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
608 | /* BBD|ECC|ID|MAR */ |
609 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
610 | /* BBD|ECC|ID */ | |
611 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
612 | /* ECC|MC|MARK */ | |
613 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
614 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
615 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
616 | /* MC|ID|ABRT|TRK0|MARK */ | |
617 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
618 | /* MCR|MARK */ | |
619 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
620 | /* Bad address mark */ | |
621 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
622 | /* TRK0 */ | |
623 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
624 | /* Abort & !ICRC */ | |
625 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
626 | /* Media change request */ | |
627 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
628 | /* SRV */ | |
629 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
630 | /* Media change */ | |
631 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
632 | /* ECC */ | |
633 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
634 | /* BBD - block marked bad */ | |
635 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
636 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
637 | }; | |
98ac62de | 638 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
639 | /* Must be first because BUSY means no other bits valid */ |
640 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
641 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
642 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
643 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
644 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
645 | }; | |
1da177e4 | 646 | |
1da177e4 LT |
647 | /* |
648 | * Is this an error we can process/parse | |
649 | */ | |
b095518e JG |
650 | if (drv_stat & ATA_BUSY) { |
651 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 652 | } |
b095518e JG |
653 | |
654 | if (drv_err) { | |
655 | /* Look for drv_err */ | |
656 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
657 | /* Look for best matches first */ | |
2e9edbf8 | 658 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
659 | sense_table[i][0]) { |
660 | *sk = sense_table[i][1]; | |
661 | *asc = sense_table[i][2]; | |
662 | *ascq = sense_table[i][3]; | |
663 | goto translate_done; | |
664 | } | |
665 | } | |
666 | /* No immediate match */ | |
246619da TH |
667 | if (verbose) |
668 | printk(KERN_WARNING "ata%u: no sense translation for " | |
669 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 670 | } |
b095518e JG |
671 | |
672 | /* Fall back to interpreting status bits */ | |
673 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
674 | if (stat_table[i][0] & drv_stat) { | |
675 | *sk = stat_table[i][1]; | |
676 | *asc = stat_table[i][2]; | |
677 | *ascq = stat_table[i][3]; | |
678 | goto translate_done; | |
1da177e4 | 679 | } |
b095518e JG |
680 | } |
681 | /* No error? Undecoded? */ | |
246619da TH |
682 | if (verbose) |
683 | printk(KERN_WARNING "ata%u: no sense translation for " | |
684 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 685 | |
2d202024 AC |
686 | /* We need a sensible error return here, which is tricky, and one |
687 | that won't cause people to do things like return a disk wrongly */ | |
688 | *sk = ABORTED_COMMAND; | |
689 | *asc = 0x00; | |
690 | *ascq = 0x00; | |
b095518e JG |
691 | |
692 | translate_done: | |
246619da TH |
693 | if (verbose) |
694 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
695 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
696 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
697 | return; |
698 | } | |
699 | ||
700 | /* | |
750426aa | 701 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
702 | * @qc: Command that completed. |
703 | * | |
704 | * This function is specific to the ATA descriptor format sense | |
705 | * block specified for the ATA pass through commands. Regardless | |
706 | * of whether the command errored or not, return a sense | |
707 | * block. Copy all controller registers into the sense | |
708 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
709 | * | |
710 | * LOCKING: | |
750426aa | 711 | * None. |
b095518e | 712 | */ |
750426aa | 713 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
714 | { |
715 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 716 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
717 | unsigned char *sb = cmd->sense_buffer; |
718 | unsigned char *desc = sb + 8; | |
246619da | 719 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
720 | |
721 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
722 | ||
0e5dec47 | 723 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 724 | |
b095518e JG |
725 | /* |
726 | * Use ata_to_sense_error() to map status register bits | |
727 | * onto sense key, asc & ascq. | |
728 | */ | |
058e55e1 TH |
729 | if (qc->err_mask || |
730 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 731 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 732 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 733 | sb[1] &= 0x0f; |
1da177e4 LT |
734 | } |
735 | ||
b095518e JG |
736 | /* |
737 | * Sense data is current and format is descriptor. | |
738 | */ | |
739 | sb[0] = 0x72; | |
1da177e4 | 740 | |
b095518e JG |
741 | desc[0] = 0x09; |
742 | ||
f38621b3 TH |
743 | /* set length of additional sense data */ |
744 | sb[7] = 14; | |
745 | desc[1] = 12; | |
b095518e JG |
746 | |
747 | /* | |
748 | * Copy registers into sense buffer. | |
749 | */ | |
750 | desc[2] = 0x00; | |
751 | desc[3] = tf->feature; /* == error reg */ | |
752 | desc[5] = tf->nsect; | |
753 | desc[7] = tf->lbal; | |
754 | desc[9] = tf->lbam; | |
755 | desc[11] = tf->lbah; | |
756 | desc[12] = tf->device; | |
757 | desc[13] = tf->command; /* == status reg */ | |
758 | ||
759 | /* | |
760 | * Fill in Extend bit, and the high order bytes | |
761 | * if applicable. | |
762 | */ | |
763 | if (tf->flags & ATA_TFLAG_LBA48) { | |
764 | desc[2] |= 0x01; | |
765 | desc[4] = tf->hob_nsect; | |
766 | desc[6] = tf->hob_lbal; | |
767 | desc[8] = tf->hob_lbam; | |
768 | desc[10] = tf->hob_lbah; | |
1da177e4 | 769 | } |
b095518e | 770 | } |
1da177e4 | 771 | |
b095518e | 772 | /** |
750426aa | 773 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
774 | * @qc: Command that we are erroring out |
775 | * | |
d25614ba TH |
776 | * Generate sense block for a failed ATA command @qc. Descriptor |
777 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
778 | * |
779 | * LOCKING: | |
750426aa | 780 | * None. |
b095518e | 781 | */ |
750426aa | 782 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 783 | { |
d25614ba | 784 | struct ata_device *dev = qc->dev; |
b095518e | 785 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 786 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 787 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 788 | unsigned char *desc = sb + 8; |
246619da | 789 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 790 | u64 block; |
b095518e JG |
791 | |
792 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
793 | ||
0e5dec47 | 794 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 795 | |
d25614ba TH |
796 | /* sense data is current and format is descriptor */ |
797 | sb[0] = 0x72; | |
798 | ||
799 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
800 | * onto sense key, asc & ascq. |
801 | */ | |
058e55e1 TH |
802 | if (qc->err_mask || |
803 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 804 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
805 | &sb[1], &sb[2], &sb[3], verbose); |
806 | sb[1] &= 0x0f; | |
1da177e4 | 807 | } |
1da177e4 | 808 | |
d25614ba | 809 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 810 | |
d25614ba TH |
811 | /* information sense data descriptor */ |
812 | sb[7] = 12; | |
813 | desc[0] = 0x00; | |
814 | desc[1] = 10; | |
a7dac447 | 815 | |
d25614ba TH |
816 | desc[2] |= 0x80; /* valid */ |
817 | desc[6] = block >> 40; | |
818 | desc[7] = block >> 32; | |
819 | desc[8] = block >> 24; | |
820 | desc[9] = block >> 16; | |
821 | desc[10] = block >> 8; | |
822 | desc[11] = block; | |
1da177e4 LT |
823 | } |
824 | ||
a6cce2a7 BK |
825 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
826 | { | |
827 | sdev->use_10_for_rw = 1; | |
828 | sdev->use_10_for_ms = 1; | |
31cc23b3 TH |
829 | |
830 | /* Schedule policy is determined by ->qc_defer() callback and | |
831 | * it needs to see every deferred qc. Set dev_blocked to 1 to | |
832 | * prevent SCSI midlayer from automatically deferring | |
833 | * requests. | |
834 | */ | |
835 | sdev->max_device_blocked = 1; | |
a6cce2a7 BK |
836 | } |
837 | ||
fa2fc7f4 JB |
838 | /** |
839 | * atapi_drain_needed - Check whether data transfer may overflow | |
73fd8b6d | 840 | * @rq: request to be checked |
fa2fc7f4 JB |
841 | * |
842 | * ATAPI commands which transfer variable length data to host | |
843 | * might overflow due to application error or hardare bug. This | |
844 | * function checks whether overflow should be drained and ignored | |
845 | * for @request. | |
846 | * | |
847 | * LOCKING: | |
848 | * None. | |
849 | * | |
850 | * RETURNS: | |
851 | * 1 if ; otherwise, 0. | |
852 | */ | |
853 | static int atapi_drain_needed(struct request *rq) | |
854 | { | |
855 | if (likely(!blk_pc_request(rq))) | |
856 | return 0; | |
857 | ||
858 | if (!rq->data_len || (rq->cmd_flags & REQ_RW)) | |
859 | return 0; | |
860 | ||
861 | return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; | |
862 | } | |
863 | ||
864 | static int ata_scsi_dev_config(struct scsi_device *sdev, | |
865 | struct ata_device *dev) | |
a6cce2a7 | 866 | { |
914ed354 TH |
867 | /* configure max sectors */ |
868 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 869 | |
fa2fc7f4 JB |
870 | if (dev->class == ATA_DEV_ATAPI) { |
871 | struct request_queue *q = sdev->request_queue; | |
872 | void *buf; | |
873 | ||
e3790c7d | 874 | /* set the min alignment and padding */ |
d0ad3bc9 JB |
875 | blk_queue_update_dma_alignment(sdev->request_queue, |
876 | ATA_DMA_PAD_SZ - 1); | |
e3790c7d | 877 | blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1); |
fa2fc7f4 JB |
878 | |
879 | /* configure draining */ | |
880 | buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); | |
881 | if (!buf) { | |
882 | ata_dev_printk(dev, KERN_ERR, | |
883 | "drain buffer allocation failed\n"); | |
884 | return -ENOMEM; | |
885 | } | |
886 | ||
887 | blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); | |
888 | } else { | |
d0ad3bc9 JB |
889 | /* ATA devices must be sector aligned */ |
890 | blk_queue_update_dma_alignment(sdev->request_queue, | |
891 | ATA_SECT_SIZE - 1); | |
d8cf5389 | 892 | sdev->manage_start_stop = 1; |
dde20207 | 893 | } |
d8cf5389 | 894 | |
f26792d5 JG |
895 | if (dev->flags & ATA_DFLAG_AN) |
896 | set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); | |
897 | ||
a6e6ce8e TH |
898 | if (dev->flags & ATA_DFLAG_NCQ) { |
899 | int depth; | |
900 | ||
901 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
902 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
903 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
904 | } | |
fa2fc7f4 JB |
905 | |
906 | return 0; | |
a6cce2a7 BK |
907 | } |
908 | ||
1da177e4 LT |
909 | /** |
910 | * ata_scsi_slave_config - Set SCSI device attributes | |
911 | * @sdev: SCSI device to examine | |
912 | * | |
913 | * This is called before we actually start reading | |
914 | * and writing to the device, to configure certain | |
915 | * SCSI mid-layer behaviors. | |
916 | * | |
917 | * LOCKING: | |
918 | * Defined by SCSI layer. We don't really care. | |
919 | */ | |
920 | ||
921 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
922 | { | |
31534363 TH |
923 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
924 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
fa2fc7f4 | 925 | int rc = 0; |
31534363 | 926 | |
a6cce2a7 | 927 | ata_scsi_sdev_config(sdev); |
1da177e4 | 928 | |
31534363 | 929 | if (dev) |
fa2fc7f4 | 930 | rc = ata_scsi_dev_config(sdev, dev); |
1da177e4 | 931 | |
fa2fc7f4 | 932 | return rc; |
1da177e4 LT |
933 | } |
934 | ||
83c47bcb TH |
935 | /** |
936 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
937 | * @sdev: SCSI device to be destroyed | |
938 | * | |
939 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
940 | * this unplugging was initiated by libata as indicated by NULL | |
941 | * dev->sdev, this function doesn't have to do anything. | |
942 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
943 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
944 | * EH. | |
945 | * | |
946 | * LOCKING: | |
947 | * Defined by SCSI layer. We don't really care. | |
948 | */ | |
949 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
950 | { | |
951 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
fa2fc7f4 | 952 | struct request_queue *q = sdev->request_queue; |
83c47bcb TH |
953 | unsigned long flags; |
954 | struct ata_device *dev; | |
955 | ||
956 | if (!ap->ops->error_handler) | |
957 | return; | |
958 | ||
ba6a1308 | 959 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
960 | dev = __ata_scsi_find_dev(ap, sdev); |
961 | if (dev && dev->sdev) { | |
962 | /* SCSI device already in CANCEL state, no need to offline it */ | |
963 | dev->sdev = NULL; | |
964 | dev->flags |= ATA_DFLAG_DETACH; | |
965 | ata_port_schedule_eh(ap); | |
966 | } | |
ba6a1308 | 967 | spin_unlock_irqrestore(ap->lock, flags); |
fa2fc7f4 JB |
968 | |
969 | kfree(q->dma_drain_buffer); | |
970 | q->dma_drain_buffer = NULL; | |
971 | q->dma_drain_size = 0; | |
83c47bcb TH |
972 | } |
973 | ||
a6e6ce8e TH |
974 | /** |
975 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
976 | * @sdev: SCSI device to configure queue depth for | |
977 | * @queue_depth: new queue depth | |
978 | * | |
979 | * This is libata standard hostt->change_queue_depth callback. | |
980 | * SCSI will call into this callback when user tries to set queue | |
981 | * depth via sysfs. | |
982 | * | |
983 | * LOCKING: | |
984 | * SCSI layer (we don't care) | |
985 | * | |
986 | * RETURNS: | |
987 | * Newly configured queue depth. | |
988 | */ | |
989 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
990 | { | |
991 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
992 | struct ata_device *dev; | |
360f654e | 993 | unsigned long flags; |
a6e6ce8e | 994 | |
c3c70c44 | 995 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
996 | return sdev->queue_depth; |
997 | ||
998 | dev = ata_scsi_find_dev(ap, sdev); | |
999 | if (!dev || !ata_dev_enabled(dev)) | |
1000 | return sdev->queue_depth; | |
1001 | ||
c3c70c44 | 1002 | /* NCQ enabled? */ |
360f654e | 1003 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
1004 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
1005 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 1006 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
1007 | queue_depth = 1; |
1008 | } | |
360f654e TH |
1009 | spin_unlock_irqrestore(ap->lock, flags); |
1010 | ||
c3c70c44 TH |
1011 | /* limit and apply queue depth */ |
1012 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
1013 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
1014 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
1015 | ||
1016 | if (sdev->queue_depth == queue_depth) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
1020 | return queue_depth; |
1021 | } | |
1022 | ||
d9aca22c | 1023 | /* XXX: for spindown warning */ |
da071b42 TH |
1024 | static void ata_delayed_done_timerfn(unsigned long arg) |
1025 | { | |
1026 | struct scsi_cmnd *scmd = (void *)arg; | |
1027 | ||
1028 | scmd->scsi_done(scmd); | |
1029 | } | |
1030 | ||
d9aca22c | 1031 | /* XXX: for spindown warning */ |
da071b42 TH |
1032 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
1033 | { | |
1034 | static struct timer_list timer; | |
1035 | ||
1036 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
1037 | mod_timer(&timer, jiffies + 5 * HZ); | |
1038 | } | |
1039 | ||
972dcafb DG |
1040 | /** |
1041 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
1042 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
1043 | * |
1044 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
1045 | * (to start). Perhaps these commands should be preceded by | |
1046 | * CHECK POWER MODE to see what power mode the device is already in. | |
1047 | * [See SAT revision 5 at www.t10.org] | |
1048 | * | |
1049 | * LOCKING: | |
cca3974e | 1050 | * spin_lock_irqsave(host lock) |
972dcafb DG |
1051 | * |
1052 | * RETURNS: | |
1053 | * Zero on success, non-zero on error. | |
1054 | */ | |
ad706991 | 1055 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 1056 | { |
542b1444 | 1057 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 1058 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 1059 | const u8 *cdb = scmd->cmnd; |
972dcafb | 1060 | |
2e5704f6 TH |
1061 | if (scmd->cmd_len < 5) |
1062 | goto invalid_fld; | |
1063 | ||
972dcafb DG |
1064 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1065 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1066 | if (cdb[1] & 0x1) { |
972dcafb DG |
1067 | ; /* ignore IMMED bit, violates sat-r05 */ |
1068 | } | |
542b1444 | 1069 | if (cdb[4] & 0x2) |
ae006510 | 1070 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1071 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1072 | goto invalid_fld; /* power conditions not supported */ |
e31e8531 TH |
1073 | |
1074 | if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) { | |
1075 | /* the device lacks PM support, finish without doing anything */ | |
1076 | scmd->result = SAM_STAT_GOOD; | |
1077 | return 1; | |
1078 | } | |
1079 | ||
542b1444 | 1080 | if (cdb[4] & 0x1) { |
972dcafb | 1081 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1082 | |
1083 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1084 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1085 | |
1086 | tf->lbah = 0x0; | |
1087 | tf->lbam = 0x0; | |
1088 | tf->lbal = 0x0; | |
1089 | tf->device |= ATA_LBA; | |
1090 | } else { | |
1091 | /* CHS */ | |
1092 | tf->lbal = 0x1; /* sect */ | |
1093 | tf->lbam = 0x0; /* cyl low */ | |
1094 | tf->lbah = 0x0; /* cyl high */ | |
1095 | } | |
1096 | ||
972dcafb | 1097 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 TH |
1098 | } else { |
1099 | /* XXX: This is for backward compatibility, will be | |
1100 | * removed. Read Documentation/feature-removal-schedule.txt | |
1101 | * for more info. | |
1102 | */ | |
d9aca22c | 1103 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
1104 | (system_state == SYSTEM_HALT || |
1105 | system_state == SYSTEM_POWER_OFF)) { | |
2dcb407e | 1106 | static unsigned long warned; |
920a4b10 | 1107 | |
da071b42 | 1108 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
1109 | ata_dev_printk(qc->dev, KERN_WARNING, |
1110 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
1111 | "UPDATE SHUTDOWN UTILITY\n"); | |
1112 | ata_dev_printk(qc->dev, KERN_WARNING, | |
1113 | "For more info, visit " | |
1114 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
1115 | |
1116 | /* ->scsi_done is not used, use it for | |
1117 | * delayed completion. | |
1118 | */ | |
1119 | scmd->scsi_done = qc->scsidone; | |
1120 | qc->scsidone = ata_delayed_done; | |
920a4b10 TH |
1121 | } |
1122 | scmd->result = SAM_STAT_GOOD; | |
1123 | return 1; | |
1124 | } | |
1125 | ||
78981a7c RH |
1126 | /* Issue ATA STANDBY IMMEDIATE command */ |
1127 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 1128 | } |
78981a7c | 1129 | |
972dcafb DG |
1130 | /* |
1131 | * Standby and Idle condition timers could be implemented but that | |
1132 | * would require libata to implement the Power condition mode page | |
1133 | * and allow the user to change it. Changing mode pages requires | |
1134 | * MODE SELECT to be implemented. | |
1135 | */ | |
1136 | ||
1137 | return 0; | |
ae006510 DG |
1138 | |
1139 | invalid_fld: | |
542b1444 | 1140 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1141 | /* "Invalid field in cbd" */ |
1142 | return 1; | |
972dcafb DG |
1143 | } |
1144 | ||
1145 | ||
1da177e4 LT |
1146 | /** |
1147 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1148 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1149 | * |
1150 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1151 | * FLUSH CACHE EXT. | |
1152 | * | |
1153 | * LOCKING: | |
cca3974e | 1154 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1155 | * |
1156 | * RETURNS: | |
1157 | * Zero on success, non-zero on error. | |
1158 | */ | |
ad706991 | 1159 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1160 | { |
1161 | struct ata_taskfile *tf = &qc->tf; | |
1162 | ||
1163 | tf->flags |= ATA_TFLAG_DEVICE; | |
1164 | tf->protocol = ATA_PROT_NODATA; | |
1165 | ||
6fc49adb | 1166 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1167 | tf->command = ATA_CMD_FLUSH_EXT; |
1168 | else | |
1169 | tf->command = ATA_CMD_FLUSH; | |
1170 | ||
b666da35 TH |
1171 | /* flush is critical for IO integrity, consider it an IO command */ |
1172 | qc->flags |= ATA_QCFLAG_IO; | |
1173 | ||
1da177e4 LT |
1174 | return 0; |
1175 | } | |
1176 | ||
3aef5231 AL |
1177 | /** |
1178 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1179 | * @cdb: SCSI command to translate |
3aef5231 AL |
1180 | * |
1181 | * Calculate LBA and transfer length for 6-byte commands. | |
1182 | * | |
1183 | * RETURNS: | |
1184 | * @plba: the LBA | |
1185 | * @plen: the transfer length | |
1186 | */ | |
542b1444 | 1187 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1188 | { |
1189 | u64 lba = 0; | |
6c7b7d2b | 1190 | u32 len; |
3aef5231 AL |
1191 | |
1192 | VPRINTK("six-byte command\n"); | |
1193 | ||
6c7b7d2b | 1194 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1195 | lba |= ((u64)cdb[2]) << 8; |
1196 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1197 | |
6c7b7d2b | 1198 | len = cdb[4]; |
3aef5231 AL |
1199 | |
1200 | *plba = lba; | |
1201 | *plen = len; | |
1202 | } | |
1203 | ||
1204 | /** | |
1205 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1206 | * @cdb: SCSI command to translate |
3aef5231 AL |
1207 | * |
1208 | * Calculate LBA and transfer length for 10-byte commands. | |
1209 | * | |
1210 | * RETURNS: | |
1211 | * @plba: the LBA | |
1212 | * @plen: the transfer length | |
1213 | */ | |
542b1444 | 1214 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1215 | { |
1216 | u64 lba = 0; | |
1217 | u32 len = 0; | |
1218 | ||
1219 | VPRINTK("ten-byte command\n"); | |
1220 | ||
542b1444 TH |
1221 | lba |= ((u64)cdb[2]) << 24; |
1222 | lba |= ((u64)cdb[3]) << 16; | |
1223 | lba |= ((u64)cdb[4]) << 8; | |
1224 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1225 | |
542b1444 TH |
1226 | len |= ((u32)cdb[7]) << 8; |
1227 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1228 | |
1229 | *plba = lba; | |
1230 | *plen = len; | |
1231 | } | |
1232 | ||
1233 | /** | |
1234 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1235 | * @cdb: SCSI command to translate |
3aef5231 AL |
1236 | * |
1237 | * Calculate LBA and transfer length for 16-byte commands. | |
1238 | * | |
1239 | * RETURNS: | |
1240 | * @plba: the LBA | |
1241 | * @plen: the transfer length | |
1242 | */ | |
542b1444 | 1243 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1244 | { |
1245 | u64 lba = 0; | |
1246 | u32 len = 0; | |
1247 | ||
1248 | VPRINTK("sixteen-byte command\n"); | |
1249 | ||
542b1444 TH |
1250 | lba |= ((u64)cdb[2]) << 56; |
1251 | lba |= ((u64)cdb[3]) << 48; | |
1252 | lba |= ((u64)cdb[4]) << 40; | |
1253 | lba |= ((u64)cdb[5]) << 32; | |
1254 | lba |= ((u64)cdb[6]) << 24; | |
1255 | lba |= ((u64)cdb[7]) << 16; | |
1256 | lba |= ((u64)cdb[8]) << 8; | |
1257 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1258 | |
542b1444 TH |
1259 | len |= ((u32)cdb[10]) << 24; |
1260 | len |= ((u32)cdb[11]) << 16; | |
1261 | len |= ((u32)cdb[12]) << 8; | |
1262 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1263 | |
1264 | *plba = lba; | |
1265 | *plen = len; | |
1266 | } | |
1267 | ||
1da177e4 LT |
1268 | /** |
1269 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1270 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1271 | * |
1272 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1273 | * | |
1274 | * LOCKING: | |
cca3974e | 1275 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1276 | * |
1277 | * RETURNS: | |
1278 | * Zero on success, non-zero on error. | |
1279 | */ | |
ad706991 | 1280 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1281 | { |
542b1444 | 1282 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1283 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1284 | struct ata_device *dev = qc->dev; |
1da177e4 | 1285 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1286 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1287 | u64 block; |
1288 | u32 n_block; | |
1da177e4 LT |
1289 | |
1290 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1291 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1292 | |
2e5704f6 TH |
1293 | if (cdb[0] == VERIFY) { |
1294 | if (scmd->cmd_len < 10) | |
1295 | goto invalid_fld; | |
542b1444 | 1296 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1297 | } else if (cdb[0] == VERIFY_16) { |
1298 | if (scmd->cmd_len < 16) | |
1299 | goto invalid_fld; | |
542b1444 | 1300 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1301 | } else |
ae006510 | 1302 | goto invalid_fld; |
1da177e4 | 1303 | |
8bf62ece | 1304 | if (!n_block) |
ae006510 | 1305 | goto nothing_to_do; |
8bf62ece | 1306 | if (block >= dev_sectors) |
ae006510 | 1307 | goto out_of_range; |
8bf62ece | 1308 | if ((block + n_block) > dev_sectors) |
ae006510 | 1309 | goto out_of_range; |
1da177e4 | 1310 | |
07506697 AL |
1311 | if (dev->flags & ATA_DFLAG_LBA) { |
1312 | tf->flags |= ATA_TFLAG_LBA; | |
1313 | ||
c6a33e24 AL |
1314 | if (lba_28_ok(block, n_block)) { |
1315 | /* use LBA28 */ | |
1316 | tf->command = ATA_CMD_VERIFY; | |
1317 | tf->device |= (block >> 24) & 0xf; | |
1318 | } else if (lba_48_ok(block, n_block)) { | |
1319 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1320 | goto out_of_range; | |
07506697 AL |
1321 | |
1322 | /* use LBA48 */ | |
1323 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1324 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1325 | |
8bf62ece | 1326 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1327 | |
8bf62ece AL |
1328 | tf->hob_lbah = (block >> 40) & 0xff; |
1329 | tf->hob_lbam = (block >> 32) & 0xff; | |
1330 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1331 | } else |
1332 | /* request too large even for LBA48 */ | |
1333 | goto out_of_range; | |
8bf62ece AL |
1334 | |
1335 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1336 | |
8bf62ece AL |
1337 | tf->lbah = (block >> 16) & 0xff; |
1338 | tf->lbam = (block >> 8) & 0xff; | |
1339 | tf->lbal = block & 0xff; | |
1da177e4 | 1340 | |
8bf62ece AL |
1341 | tf->device |= ATA_LBA; |
1342 | } else { | |
1343 | /* CHS */ | |
1344 | u32 sect, head, cyl, track; | |
1345 | ||
c6a33e24 AL |
1346 | if (!lba_28_ok(block, n_block)) |
1347 | goto out_of_range; | |
07506697 | 1348 | |
8bf62ece AL |
1349 | /* Convert LBA to CHS */ |
1350 | track = (u32)block / dev->sectors; | |
1351 | cyl = track / dev->heads; | |
1352 | head = track % dev->heads; | |
1353 | sect = (u32)block % dev->sectors + 1; | |
1354 | ||
c187c4b5 AL |
1355 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1356 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1357 | |
1358 | /* Check whether the converted CHS can fit. | |
1359 | Cylinder: 0-65535 | |
8bf62ece AL |
1360 | Head: 0-15 |
1361 | Sector: 1-255*/ | |
2e9edbf8 | 1362 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1363 | goto out_of_range; |
2e9edbf8 | 1364 | |
8bf62ece AL |
1365 | tf->command = ATA_CMD_VERIFY; |
1366 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1367 | tf->lbal = sect; | |
1368 | tf->lbam = cyl; | |
1369 | tf->lbah = cyl >> 8; | |
1370 | tf->device |= head; | |
1371 | } | |
1da177e4 LT |
1372 | |
1373 | return 0; | |
ae006510 DG |
1374 | |
1375 | invalid_fld: | |
542b1444 | 1376 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1377 | /* "Invalid field in cbd" */ |
1378 | return 1; | |
1379 | ||
1380 | out_of_range: | |
542b1444 | 1381 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1382 | /* "Logical Block Address out of range" */ |
1383 | return 1; | |
1384 | ||
1385 | nothing_to_do: | |
542b1444 | 1386 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1387 | return 1; |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | /** | |
1391 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1392 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1393 | * |
1394 | * Converts any of six SCSI read/write commands into the | |
1395 | * ATA counterpart, including starting sector (LBA), | |
1396 | * sector count, and taking into account the device's LBA48 | |
1397 | * support. | |
1398 | * | |
1399 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1400 | * %WRITE_16 are currently supported. | |
1401 | * | |
1402 | * LOCKING: | |
cca3974e | 1403 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1404 | * |
1405 | * RETURNS: | |
1406 | * Zero on success, non-zero on error. | |
1407 | */ | |
ad706991 | 1408 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1409 | { |
542b1444 | 1410 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1411 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1412 | unsigned int tf_flags = 0; |
3aef5231 AL |
1413 | u64 block; |
1414 | u32 n_block; | |
bd056d7e | 1415 | int rc; |
1da177e4 | 1416 | |
542b1444 | 1417 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1418 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1419 | |
9a3dccc4 | 1420 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1421 | switch (cdb[0]) { |
3aef5231 AL |
1422 | case READ_10: |
1423 | case WRITE_10: | |
2e5704f6 TH |
1424 | if (unlikely(scmd->cmd_len < 10)) |
1425 | goto invalid_fld; | |
542b1444 TH |
1426 | scsi_10_lba_len(cdb, &block, &n_block); |
1427 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1428 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1429 | break; |
1430 | case READ_6: | |
1431 | case WRITE_6: | |
2e5704f6 TH |
1432 | if (unlikely(scmd->cmd_len < 6)) |
1433 | goto invalid_fld; | |
542b1444 | 1434 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1435 | |
1436 | /* for 6-byte r/w commands, transfer length 0 | |
1437 | * means 256 blocks of data, not 0 block. | |
1438 | */ | |
76b2bf9b JG |
1439 | if (!n_block) |
1440 | n_block = 256; | |
3aef5231 AL |
1441 | break; |
1442 | case READ_16: | |
1443 | case WRITE_16: | |
2e5704f6 TH |
1444 | if (unlikely(scmd->cmd_len < 16)) |
1445 | goto invalid_fld; | |
542b1444 TH |
1446 | scsi_16_lba_len(cdb, &block, &n_block); |
1447 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1448 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1449 | break; |
1450 | default: | |
8bf62ece | 1451 | DPRINTK("no-byte command\n"); |
ae006510 | 1452 | goto invalid_fld; |
1da177e4 LT |
1453 | } |
1454 | ||
8bf62ece AL |
1455 | /* Check and compose ATA command */ |
1456 | if (!n_block) | |
c187c4b5 AL |
1457 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1458 | * length 0 means transfer 0 block of data. | |
1459 | * However, for ATA R/W commands, sector count 0 means | |
1460 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1461 | * |
1462 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1463 | */ |
ae006510 | 1464 | goto nothing_to_do; |
1da177e4 | 1465 | |
bd056d7e | 1466 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1467 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1468 | |
bd056d7e TH |
1469 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1470 | qc->tag); | |
1471 | if (likely(rc == 0)) | |
1472 | return 0; | |
ae006510 | 1473 | |
bd056d7e TH |
1474 | if (rc == -ERANGE) |
1475 | goto out_of_range; | |
1476 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1477 | invalid_fld: |
542b1444 | 1478 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1479 | /* "Invalid field in cbd" */ |
1480 | return 1; | |
1481 | ||
1482 | out_of_range: | |
542b1444 | 1483 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1484 | /* "Logical Block Address out of range" */ |
1485 | return 1; | |
1486 | ||
1487 | nothing_to_do: | |
542b1444 | 1488 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1489 | return 1; |
1da177e4 LT |
1490 | } |
1491 | ||
77853bf2 | 1492 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1493 | { |
c31f571d | 1494 | struct ata_port *ap = qc->ap; |
1da177e4 | 1495 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1496 | u8 *cdb = cmd->cmnd; |
2dcb407e | 1497 | int need_sense = (qc->err_mask != 0); |
b095518e JG |
1498 | |
1499 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1500 | * user mandated it or if there's an error. Note that if we | |
1501 | * generate because the user forced us to, a check condition | |
1502 | * is generated and the ATA register values are returned | |
1503 | * whether the command completed successfully or not. If there | |
1504 | * was no error, SK, ASC and ASCQ will all be zero. | |
1505 | */ | |
a7dac447 | 1506 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
2dcb407e | 1507 | ((cdb[2] & 0x20) || need_sense)) { |
750426aa | 1508 | ata_gen_passthru_sense(qc); |
b095518e JG |
1509 | } else { |
1510 | if (!need_sense) { | |
1511 | cmd->result = SAM_STAT_GOOD; | |
1512 | } else { | |
1513 | /* TODO: decide which descriptor format to use | |
1514 | * for 48b LBA devices and call that here | |
1515 | * instead of the fixed desc, which is only | |
1516 | * good for smaller LBA (and maybe CHS?) | |
1517 | * devices. | |
1518 | */ | |
750426aa | 1519 | ata_gen_ata_sense(qc); |
b095518e JG |
1520 | } |
1521 | } | |
1da177e4 | 1522 | |
d9aca22c | 1523 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1524 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1525 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1526 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1527 | else if (likely(system_state != SYSTEM_HALT && | |
1528 | system_state != SYSTEM_POWER_OFF)) | |
1529 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1530 | ||
c31f571d | 1531 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1532 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1533 | |
1534 | qc->scsidone(cmd); | |
1535 | ||
77853bf2 | 1536 | ata_qc_free(qc); |
1da177e4 LT |
1537 | } |
1538 | ||
1539 | /** | |
1540 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1541 | * @dev: ATA device to which the command is addressed |
1542 | * @cmd: SCSI command to execute | |
1543 | * @done: SCSI command completion function | |
1544 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1545 | * | |
1546 | * Our ->queuecommand() function has decided that the SCSI | |
1547 | * command issued can be directly translated into an ATA | |
1548 | * command, rather than handled internally. | |
1549 | * | |
1550 | * This function sets up an ata_queued_cmd structure for the | |
1551 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1552 | * | |
ae006510 DG |
1553 | * The xlat_func argument (actor) returns 0 if ready to execute |
1554 | * ATA command, else 1 to finish translation. If 1 is returned | |
1555 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1556 | * to be set reflecting an error condition or clean (early) | |
1557 | * termination. | |
1558 | * | |
1da177e4 | 1559 | * LOCKING: |
cca3974e | 1560 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1561 | * |
1562 | * RETURNS: | |
1563 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1564 | * needs to be deferred. | |
1da177e4 | 1565 | */ |
2115ea94 TH |
1566 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1567 | void (*done)(struct scsi_cmnd *), | |
1568 | ata_xlat_func_t xlat_func) | |
1da177e4 | 1569 | { |
31cc23b3 | 1570 | struct ata_port *ap = dev->link->ap; |
1da177e4 | 1571 | struct ata_queued_cmd *qc; |
31cc23b3 | 1572 | int rc; |
1da177e4 LT |
1573 | |
1574 | VPRINTK("ENTER\n"); | |
1575 | ||
3373efd8 | 1576 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1577 | if (!qc) |
ae006510 | 1578 | goto err_mem; |
1da177e4 LT |
1579 | |
1580 | /* data is present; dma-map it */ | |
be7db055 CH |
1581 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1582 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1583 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1584 | ata_dev_printk(dev, KERN_WARNING, |
1585 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1586 | goto err_did; |
1da177e4 LT |
1587 | } |
1588 | ||
7120165c | 1589 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1590 | |
1591 | qc->dma_dir = cmd->sc_data_direction; | |
1592 | } | |
1593 | ||
1594 | qc->complete_fn = ata_scsi_qc_complete; | |
1595 | ||
ad706991 | 1596 | if (xlat_func(qc)) |
ae006510 | 1597 | goto early_finish; |
1da177e4 | 1598 | |
31cc23b3 TH |
1599 | if (ap->ops->qc_defer) { |
1600 | if ((rc = ap->ops->qc_defer(qc))) | |
1601 | goto defer; | |
1602 | } | |
1603 | ||
1da177e4 | 1604 | /* select device, send command to hardware */ |
8e0e694a | 1605 | ata_qc_issue(qc); |
1da177e4 LT |
1606 | |
1607 | VPRINTK("EXIT\n"); | |
2115ea94 | 1608 | return 0; |
1da177e4 | 1609 | |
ae006510 | 1610 | early_finish: |
2dcb407e | 1611 | ata_qc_free(qc); |
da071b42 | 1612 | qc->scsidone(cmd); |
ae006510 | 1613 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1614 | return 0; |
ae006510 DG |
1615 | |
1616 | err_did: | |
1da177e4 | 1617 | ata_qc_free(qc); |
ae006510 | 1618 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1619 | qc->scsidone(cmd); |
253b92ec | 1620 | err_mem: |
ae006510 | 1621 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1622 | return 0; |
3dc1d881 TH |
1623 | |
1624 | defer: | |
31cc23b3 | 1625 | ata_qc_free(qc); |
3dc1d881 | 1626 | DPRINTK("EXIT - defer\n"); |
31cc23b3 TH |
1627 | if (rc == ATA_DEFER_LINK) |
1628 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1629 | else | |
1630 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 LT |
1631 | } |
1632 | ||
1633 | /** | |
1634 | * ata_scsi_rbuf_get - Map response buffer. | |
1635 | * @cmd: SCSI command containing buffer to be mapped. | |
1636 | * @buf_out: Pointer to mapped area. | |
1637 | * | |
1638 | * Maps buffer contained within SCSI command @cmd. | |
1639 | * | |
1640 | * LOCKING: | |
cca3974e | 1641 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1642 | * |
1643 | * RETURNS: | |
1644 | * Length of response buffer. | |
1645 | */ | |
1646 | ||
1647 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1648 | { | |
1649 | u8 *buf; | |
1650 | unsigned int buflen; | |
1651 | ||
7120165c | 1652 | struct scatterlist *sg = scsi_sglist(cmd); |
1da177e4 | 1653 | |
e10b8c3f | 1654 | if (sg) { |
45711f1a | 1655 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; |
1da177e4 LT |
1656 | buflen = sg->length; |
1657 | } else { | |
e10b8c3f BH |
1658 | buf = NULL; |
1659 | buflen = 0; | |
1da177e4 LT |
1660 | } |
1661 | ||
1662 | *buf_out = buf; | |
1663 | return buflen; | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1668 | * @cmd: SCSI command containing buffer to be unmapped. | |
1669 | * @buf: buffer to unmap | |
1670 | * | |
1671 | * Unmaps response buffer contained within @cmd. | |
1672 | * | |
1673 | * LOCKING: | |
cca3974e | 1674 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1675 | */ |
1676 | ||
1677 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1678 | { | |
7120165c | 1679 | struct scatterlist *sg = scsi_sglist(cmd); |
e10b8c3f | 1680 | if (sg) |
da02d2a1 | 1681 | kunmap_atomic(buf - sg->offset, KM_IRQ0); |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | /** | |
1685 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1686 | * @args: device IDENTIFY data / SCSI command of interest. | |
1687 | * @actor: Callback hook for desired SCSI command simulator | |
1688 | * | |
1689 | * Takes care of the hard work of simulating a SCSI command... | |
1690 | * Mapping the response buffer, calling the command's handler, | |
1691 | * and handling the handler's return value. This return value | |
1692 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1693 | * completed successfully (0), or not (in which case cmd->result |
1694 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1695 | * |
1696 | * LOCKING: | |
cca3974e | 1697 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1698 | */ |
1699 | ||
1700 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
2dcb407e JG |
1701 | unsigned int (*actor) (struct ata_scsi_args *args, |
1702 | u8 *rbuf, unsigned int buflen)) | |
1da177e4 LT |
1703 | { |
1704 | u8 *rbuf; | |
1705 | unsigned int buflen, rc; | |
1706 | struct scsi_cmnd *cmd = args->cmd; | |
b445c568 JG |
1707 | unsigned long flags; |
1708 | ||
1709 | local_irq_save(flags); | |
1da177e4 LT |
1710 | |
1711 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1712 | memset(rbuf, 0, buflen); | |
1713 | rc = actor(args, rbuf, buflen); | |
1714 | ata_scsi_rbuf_put(cmd, rbuf); | |
1715 | ||
b445c568 JG |
1716 | local_irq_restore(flags); |
1717 | ||
ae006510 | 1718 | if (rc == 0) |
1da177e4 | 1719 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1720 | args->done(cmd); |
1da177e4 LT |
1721 | } |
1722 | ||
6a36261e TH |
1723 | /** |
1724 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1725 | * @idx: byte index into SCSI response buffer | |
1726 | * @val: value to set | |
1727 | * | |
1728 | * To be used by SCSI command simulator functions. This macros | |
1729 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1730 | * are in scope. | |
1731 | * | |
1732 | * LOCKING: | |
1733 | * None. | |
1734 | */ | |
1735 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1736 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1737 | } while (0) | |
1738 | ||
1da177e4 LT |
1739 | /** |
1740 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1741 | * @args: device IDENTIFY data / SCSI command of interest. | |
1742 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1743 | * @buflen: Response buffer length. | |
1744 | * | |
1745 | * Returns standard device identification data associated | |
b142eb65 | 1746 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1747 | * |
1748 | * LOCKING: | |
cca3974e | 1749 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1750 | */ |
1751 | ||
1752 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1753 | unsigned int buflen) | |
1754 | { | |
1755 | u8 hdr[] = { | |
1756 | TYPE_DISK, | |
1757 | 0, | |
1758 | 0x5, /* claim SPC-3 version compatibility */ | |
1759 | 2, | |
1760 | 95 - 4 | |
1761 | }; | |
1762 | ||
1763 | /* set scsi removeable (RMB) bit per ata bit */ | |
1764 | if (ata_id_removeable(args->id)) | |
1765 | hdr[1] |= (1 << 7); | |
1766 | ||
1767 | VPRINTK("ENTER\n"); | |
1768 | ||
1769 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1770 | ||
1771 | if (buflen > 35) { | |
1772 | memcpy(&rbuf[8], "ATA ", 8); | |
a0cf733b TH |
1773 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); |
1774 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 LT |
1775 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1776 | memcpy(&rbuf[32], "n/a ", 4); | |
1777 | } | |
1778 | ||
1779 | if (buflen > 63) { | |
1780 | const u8 versions[] = { | |
1781 | 0x60, /* SAM-3 (no version claimed) */ | |
1782 | ||
1783 | 0x03, | |
1784 | 0x20, /* SBC-2 (no version claimed) */ | |
1785 | ||
1786 | 0x02, | |
1787 | 0x60 /* SPC-3 (no version claimed) */ | |
1788 | }; | |
1789 | ||
1790 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1791 | } | |
1792 | ||
1793 | return 0; | |
1794 | } | |
1795 | ||
1796 | /** | |
b142eb65 | 1797 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1798 | * @args: device IDENTIFY data / SCSI command of interest. |
1799 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1800 | * @buflen: Response buffer length. | |
1801 | * | |
b142eb65 | 1802 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1803 | * |
1804 | * LOCKING: | |
cca3974e | 1805 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1806 | */ |
1807 | ||
1808 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1809 | unsigned int buflen) | |
1810 | { | |
1811 | const u8 pages[] = { | |
1812 | 0x00, /* page 0x00, this page */ | |
1813 | 0x80, /* page 0x80, unit serial no page */ | |
1814 | 0x83 /* page 0x83, device ident page */ | |
1815 | }; | |
b142eb65 | 1816 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1817 | |
1818 | if (buflen > 6) | |
1819 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | /** | |
b142eb65 | 1825 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1826 | * @args: device IDENTIFY data / SCSI command of interest. |
1827 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1828 | * @buflen: Response buffer length. | |
1829 | * | |
1830 | * Returns ATA device serial number. | |
1831 | * | |
1832 | * LOCKING: | |
cca3974e | 1833 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1834 | */ |
1835 | ||
1836 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1837 | unsigned int buflen) | |
1838 | { | |
1839 | const u8 hdr[] = { | |
1840 | 0, | |
1841 | 0x80, /* this page code */ | |
1842 | 0, | |
a0cf733b | 1843 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 LT |
1844 | }; |
1845 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1846 | ||
a0cf733b | 1847 | if (buflen > (ATA_ID_SERNO_LEN + 4 - 1)) |
6a62a04d | 1848 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
a0cf733b | 1849 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1da177e4 LT |
1850 | |
1851 | return 0; | |
1852 | } | |
1853 | ||
1da177e4 | 1854 | /** |
b142eb65 | 1855 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1856 | * @args: device IDENTIFY data / SCSI command of interest. |
1857 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1858 | * @buflen: Response buffer length. | |
1859 | * | |
b142eb65 JG |
1860 | * Yields two logical unit device identification designators: |
1861 | * - vendor specific ASCII containing the ATA serial number | |
1862 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1863 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1864 | * |
1865 | * LOCKING: | |
cca3974e | 1866 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1867 | */ |
1868 | ||
1869 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1870 | unsigned int buflen) | |
1871 | { | |
b142eb65 JG |
1872 | int num; |
1873 | const int sat_model_serial_desc_len = 68; | |
1da177e4 | 1874 | |
b142eb65 JG |
1875 | rbuf[1] = 0x83; /* this page code */ |
1876 | num = 4; | |
1877 | ||
a0cf733b | 1878 | if (buflen > (ATA_ID_SERNO_LEN + num + 3)) { |
b142eb65 | 1879 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2e9edbf8 | 1880 | rbuf[num + 0] = 2; |
a0cf733b | 1881 | rbuf[num + 3] = ATA_ID_SERNO_LEN; |
b142eb65 JG |
1882 | num += 4; |
1883 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1884 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1885 | num += ATA_ID_SERNO_LEN; | |
1da177e4 | 1886 | } |
b142eb65 JG |
1887 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1888 | /* SAT defined lu model and serial numbers descriptor */ | |
1889 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1890 | rbuf[num + 0] = 2; |
1891 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1892 | rbuf[num + 3] = sat_model_serial_desc_len; |
1893 | num += 4; | |
1894 | memcpy(rbuf + num, "ATA ", 8); | |
1895 | num += 8; | |
1896 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1897 | ATA_ID_PROD, ATA_ID_PROD_LEN); |
1898 | num += ATA_ID_PROD_LEN; | |
b142eb65 | 1899 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
a0cf733b TH |
1900 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1901 | num += ATA_ID_SERNO_LEN; | |
b142eb65 JG |
1902 | } |
1903 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1904 | return 0; |
1905 | } | |
1906 | ||
ad355b46 JG |
1907 | /** |
1908 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
1909 | * @args: device IDENTIFY data / SCSI command of interest. | |
1910 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1911 | * @buflen: Response buffer length. | |
1912 | * | |
1913 | * Yields SAT-specified ATA VPD page. | |
1914 | * | |
1915 | * LOCKING: | |
1916 | * spin_lock_irqsave(host lock) | |
1917 | */ | |
1918 | ||
08f01058 | 1919 | static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf, |
ad355b46 JG |
1920 | unsigned int buflen) |
1921 | { | |
1922 | u8 pbuf[60]; | |
1923 | struct ata_taskfile tf; | |
1924 | unsigned int i; | |
1925 | ||
1926 | if (!buflen) | |
1927 | return 0; | |
1928 | ||
1929 | memset(&pbuf, 0, sizeof(pbuf)); | |
1930 | memset(&tf, 0, sizeof(tf)); | |
1931 | ||
1932 | pbuf[1] = 0x89; /* our page code */ | |
1933 | pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
1934 | pbuf[3] = (0x238 & 0xff); | |
1935 | ||
c78968bb JG |
1936 | memcpy(&pbuf[8], "linux ", 8); |
1937 | memcpy(&pbuf[16], "libata ", 16); | |
1938 | memcpy(&pbuf[32], DRV_VERSION, 4); | |
ad355b46 JG |
1939 | ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4); |
1940 | ||
1941 | /* we don't store the ATA device signature, so we fake it */ | |
1942 | ||
1943 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
1944 | tf.lbal = 0x1; | |
1945 | tf.nsect = 0x1; | |
1946 | ||
1947 | ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */ | |
1948 | pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
1949 | ||
1950 | pbuf[56] = ATA_CMD_ID_ATA; | |
1951 | ||
1952 | i = min(buflen, 60U); | |
1953 | memcpy(rbuf, &pbuf[0], i); | |
1954 | buflen -= i; | |
1955 | ||
1956 | if (!buflen) | |
1957 | return 0; | |
1958 | ||
1959 | memcpy(&rbuf[60], &args->id[0], min(buflen, 512U)); | |
1960 | return 0; | |
1961 | } | |
1962 | ||
1da177e4 | 1963 | /** |
0cba632b | 1964 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1965 | * @args: device IDENTIFY data / SCSI command of interest. |
1966 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1967 | * @buflen: Response buffer length. | |
1968 | * | |
1969 | * No operation. Simply returns success to caller, to indicate | |
1970 | * that the caller should successfully complete this SCSI command. | |
1971 | * | |
1972 | * LOCKING: | |
cca3974e | 1973 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1974 | */ |
1975 | ||
1976 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1977 | unsigned int buflen) | |
1978 | { | |
1979 | VPRINTK("ENTER\n"); | |
1980 | return 0; | |
1981 | } | |
1982 | ||
1983 | /** | |
1984 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1985 | * @ptr_io: (input/output) Location to store more output data | |
1986 | * @last: End of output data buffer | |
1987 | * @buf: Pointer to BLOB being added to output buffer | |
1988 | * @buflen: Length of BLOB | |
1989 | * | |
1990 | * Store MODE SENSE data on an output buffer. | |
1991 | * | |
1992 | * LOCKING: | |
1993 | * None. | |
1994 | */ | |
1995 | ||
1996 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1997 | const u8 *buf, unsigned int buflen) | |
1998 | { | |
1999 | u8 *ptr = *ptr_io; | |
2000 | ||
2001 | if ((ptr + buflen - 1) > last) | |
2002 | return; | |
2003 | ||
2004 | memcpy(ptr, buf, buflen); | |
2005 | ||
2006 | ptr += buflen; | |
2007 | ||
2008 | *ptr_io = ptr; | |
2009 | } | |
2010 | ||
2011 | /** | |
2012 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
2013 | * @id: device IDENTIFY data | |
2014 | * @ptr_io: (input/output) Location to store more output data | |
2015 | * @last: End of output data buffer | |
2016 | * | |
2017 | * Generate a caching info page, which conditionally indicates | |
2018 | * write caching to the SCSI layer, depending on device | |
2019 | * capabilities. | |
2020 | * | |
2021 | * LOCKING: | |
2022 | * None. | |
2023 | */ | |
2024 | ||
2025 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
2026 | const u8 *last) | |
2027 | { | |
00ac37f5 | 2028 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 2029 | |
00ac37f5 | 2030 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
2031 | if (ata_id_wcache_enabled(id)) |
2032 | page[2] |= (1 << 2); /* write cache enable */ | |
2033 | if (!ata_id_rahead_enabled(id)) | |
2034 | page[12] |= (1 << 5); /* disable read ahead */ | |
2035 | ||
2036 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
2037 | return sizeof(page); | |
2038 | } | |
2039 | ||
2040 | /** | |
2041 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
2042 | * @dev: Device associated with this MODE SENSE command | |
2043 | * @ptr_io: (input/output) Location to store more output data | |
2044 | * @last: End of output data buffer | |
2045 | * | |
2046 | * Generate a generic MODE SENSE control mode page. | |
2047 | * | |
2048 | * LOCKING: | |
2049 | * None. | |
2050 | */ | |
2051 | ||
2052 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
2053 | { | |
00ac37f5 DG |
2054 | ata_msense_push(ptr_io, last, def_control_mpage, |
2055 | sizeof(def_control_mpage)); | |
2056 | return sizeof(def_control_mpage); | |
1da177e4 LT |
2057 | } |
2058 | ||
2059 | /** | |
2060 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
2061 | * @dev: Device associated with this MODE SENSE command | |
2062 | * @ptr_io: (input/output) Location to store more output data | |
2063 | * @last: End of output data buffer | |
2064 | * | |
2065 | * Generate a generic MODE SENSE r/w error recovery page. | |
2066 | * | |
2067 | * LOCKING: | |
2068 | * None. | |
2069 | */ | |
2070 | ||
2071 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
2072 | { | |
1da177e4 | 2073 | |
00ac37f5 DG |
2074 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
2075 | sizeof(def_rw_recovery_mpage)); | |
2076 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
2077 | } |
2078 | ||
48bdc8ec JA |
2079 | /* |
2080 | * We can turn this into a real blacklist if it's needed, for now just | |
2081 | * blacklist any Maxtor BANC1G10 revision firmware | |
2082 | */ | |
2083 | static int ata_dev_supports_fua(u16 *id) | |
2084 | { | |
a0cf733b | 2085 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 2086 | |
c3c013a2 JG |
2087 | if (!libata_fua) |
2088 | return 0; | |
48bdc8ec JA |
2089 | if (!ata_id_has_fua(id)) |
2090 | return 0; | |
2091 | ||
a0cf733b TH |
2092 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
2093 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 2094 | |
2e02671d | 2095 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 2096 | return 1; |
2e02671d | 2097 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
2098 | return 1; |
2099 | ||
2100 | return 0; /* blacklisted */ | |
2101 | } | |
2102 | ||
1da177e4 LT |
2103 | /** |
2104 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2105 | * @args: device IDENTIFY data / SCSI command of interest. | |
2106 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2107 | * @buflen: Response buffer length. | |
2108 | * | |
00ac37f5 DG |
2109 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2110 | * access devices (e.g. disks) only. There should be no block | |
2111 | * descriptor for other device types. | |
1da177e4 LT |
2112 | * |
2113 | * LOCKING: | |
cca3974e | 2114 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2115 | */ |
2116 | ||
2117 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
2118 | unsigned int buflen) | |
2119 | { | |
9a3dccc4 | 2120 | struct ata_device *dev = args->dev; |
1da177e4 | 2121 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
2122 | const u8 sat_blk_desc[] = { |
2123 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2124 | 0, | |
2125 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2126 | }; | |
2127 | u8 pg, spg; | |
2128 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 2129 | u8 dpofua; |
1da177e4 LT |
2130 | |
2131 | VPRINTK("ENTER\n"); | |
2132 | ||
2133 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2134 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2135 | /* | |
2136 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2137 | */ |
00ac37f5 | 2138 | |
1da177e4 | 2139 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2140 | switch (page_control) { |
2141 | case 0: /* current */ | |
2142 | break; /* supported */ | |
2143 | case 3: /* saved */ | |
2144 | goto saving_not_supp; | |
2145 | case 1: /* changeable */ | |
2146 | case 2: /* defaults */ | |
2147 | default: | |
2148 | goto invalid_fld; | |
2149 | } | |
1da177e4 | 2150 | |
00ac37f5 DG |
2151 | if (six_byte) { |
2152 | output_len = 4 + (ebd ? 8 : 0); | |
2153 | alloc_len = scsicmd[4]; | |
2154 | } else { | |
2155 | output_len = 8 + (ebd ? 8 : 0); | |
2156 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2157 | } | |
2158 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
2159 | |
2160 | p = rbuf + output_len; | |
00ac37f5 | 2161 | last = rbuf + minlen - 1; |
1da177e4 | 2162 | |
00ac37f5 DG |
2163 | pg = scsicmd[2] & 0x3f; |
2164 | spg = scsicmd[3]; | |
2165 | /* | |
2166 | * No mode subpages supported (yet) but asking for _all_ | |
2167 | * subpages may be valid | |
2168 | */ | |
2169 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2170 | goto invalid_fld; | |
2171 | ||
2172 | switch(pg) { | |
2173 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
2174 | output_len += ata_msense_rw_recovery(&p, last); |
2175 | break; | |
2176 | ||
00ac37f5 | 2177 | case CACHE_MPAGE: |
1da177e4 LT |
2178 | output_len += ata_msense_caching(args->id, &p, last); |
2179 | break; | |
2180 | ||
00ac37f5 | 2181 | case CONTROL_MPAGE: { |
1da177e4 LT |
2182 | output_len += ata_msense_ctl_mode(&p, last); |
2183 | break; | |
2184 | } | |
2185 | ||
00ac37f5 | 2186 | case ALL_MPAGES: |
1da177e4 LT |
2187 | output_len += ata_msense_rw_recovery(&p, last); |
2188 | output_len += ata_msense_caching(args->id, &p, last); | |
2189 | output_len += ata_msense_ctl_mode(&p, last); | |
2190 | break; | |
2191 | ||
2192 | default: /* invalid page code */ | |
ae006510 | 2193 | goto invalid_fld; |
1da177e4 LT |
2194 | } |
2195 | ||
00ac37f5 DG |
2196 | if (minlen < 1) |
2197 | return 0; | |
9a3dccc4 TH |
2198 | |
2199 | dpofua = 0; | |
f79d409f | 2200 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2201 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2202 | dpofua = 1 << 4; | |
2203 | ||
1da177e4 LT |
2204 | if (six_byte) { |
2205 | output_len--; | |
2206 | rbuf[0] = output_len; | |
9a3dccc4 TH |
2207 | if (minlen > 2) |
2208 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
2209 | if (ebd) { |
2210 | if (minlen > 3) | |
2211 | rbuf[3] = sizeof(sat_blk_desc); | |
2212 | if (minlen > 11) | |
2213 | memcpy(rbuf + 4, sat_blk_desc, | |
2214 | sizeof(sat_blk_desc)); | |
2215 | } | |
1da177e4 LT |
2216 | } else { |
2217 | output_len -= 2; | |
2218 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
2219 | if (minlen > 1) |
2220 | rbuf[1] = output_len; | |
9a3dccc4 TH |
2221 | if (minlen > 3) |
2222 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
2223 | if (ebd) { |
2224 | if (minlen > 7) | |
2225 | rbuf[7] = sizeof(sat_blk_desc); | |
2226 | if (minlen > 15) | |
2227 | memcpy(rbuf + 8, sat_blk_desc, | |
2228 | sizeof(sat_blk_desc)); | |
2229 | } | |
1da177e4 | 2230 | } |
1da177e4 | 2231 | return 0; |
ae006510 DG |
2232 | |
2233 | invalid_fld: | |
2234 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2235 | /* "Invalid field in cbd" */ | |
2236 | return 1; | |
2237 | ||
2238 | saving_not_supp: | |
2239 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2240 | /* "Saving parameters not supported" */ | |
2241 | return 1; | |
1da177e4 LT |
2242 | } |
2243 | ||
2244 | /** | |
2245 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2246 | * @args: device IDENTIFY data / SCSI command of interest. | |
2247 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2248 | * @buflen: Response buffer length. | |
2249 | * | |
2250 | * Simulate READ CAPACITY commands. | |
2251 | * | |
2252 | * LOCKING: | |
6a36261e | 2253 | * None. |
1da177e4 | 2254 | */ |
1da177e4 | 2255 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
2dcb407e | 2256 | unsigned int buflen) |
1da177e4 | 2257 | { |
6a36261e | 2258 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2259 | |
2260 | VPRINTK("ENTER\n"); | |
2261 | ||
1da177e4 | 2262 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2263 | if (last_lba >= 0xffffffffULL) |
2264 | last_lba = 0xffffffff; | |
0c144d0d | 2265 | |
1da177e4 | 2266 | /* sector count, 32-bit */ |
6a36261e TH |
2267 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); |
2268 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2269 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2270 | ATA_SCSI_RBUF_SET(3, last_lba); | |
1da177e4 LT |
2271 | |
2272 | /* sector size */ | |
6a36261e | 2273 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); |
4ca4e439 | 2274 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE & 0xff); |
1da177e4 LT |
2275 | } else { |
2276 | /* sector count, 64-bit */ | |
6a36261e TH |
2277 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); |
2278 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2279 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2280 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2281 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2282 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2283 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2284 | ATA_SCSI_RBUF_SET(7, last_lba); | |
1da177e4 LT |
2285 | |
2286 | /* sector size */ | |
6a36261e | 2287 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); |
4ca4e439 | 2288 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE & 0xff); |
1da177e4 LT |
2289 | } |
2290 | ||
2291 | return 0; | |
2292 | } | |
2293 | ||
2294 | /** | |
2295 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2296 | * @args: device IDENTIFY data / SCSI command of interest. | |
2297 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2298 | * @buflen: Response buffer length. | |
2299 | * | |
2300 | * Simulate REPORT LUNS command. | |
2301 | * | |
2302 | * LOCKING: | |
cca3974e | 2303 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2304 | */ |
2305 | ||
2306 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2307 | unsigned int buflen) | |
2308 | { | |
2309 | VPRINTK("ENTER\n"); | |
2310 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2311 | ||
2312 | return 0; | |
2313 | } | |
2314 | ||
845c5834 DG |
2315 | /** |
2316 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2317 | * @cmd: SCSI request to be handled | |
2318 | * @sk: SCSI-defined sense key | |
2319 | * @asc: SCSI-defined additional sense code | |
2320 | * @ascq: SCSI-defined additional sense code qualifier | |
2321 | * | |
2322 | * Helper function that builds a valid fixed format, current | |
2323 | * response code and the given sense key (sk), additional sense | |
2324 | * code (asc) and additional sense code qualifier (ascq) with | |
2325 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2326 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2327 | * | |
2328 | * LOCKING: | |
2329 | * Not required | |
2330 | */ | |
2331 | ||
2332 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2333 | { | |
2334 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2335 | ||
52691764 | 2336 | scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); |
845c5834 DG |
2337 | } |
2338 | ||
1da177e4 LT |
2339 | /** |
2340 | * ata_scsi_badcmd - End a SCSI request with an error | |
2341 | * @cmd: SCSI request to be handled | |
2342 | * @done: SCSI command completion function | |
2343 | * @asc: SCSI-defined additional sense code | |
2344 | * @ascq: SCSI-defined additional sense code qualifier | |
2345 | * | |
2346 | * Helper function that completes a SCSI command with | |
2347 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2348 | * and the specified additional sense codes. | |
2349 | * | |
2350 | * LOCKING: | |
cca3974e | 2351 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2352 | */ |
2353 | ||
2354 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2355 | { | |
2356 | DPRINTK("ENTER\n"); | |
ae006510 | 2357 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2358 | |
2359 | done(cmd); | |
2360 | } | |
2361 | ||
77853bf2 | 2362 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2363 | { |
74e6c8c3 | 2364 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2365 | /* FIXME: not quite right; we don't want the |
2366 | * translation of taskfile registers into | |
2367 | * a sense descriptors, since that's only | |
2368 | * correct for ATA, not ATAPI | |
2369 | */ | |
750426aa | 2370 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2371 | } |
a939c963 | 2372 | |
c6e6e666 | 2373 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2374 | ata_qc_free(qc); |
c6e6e666 | 2375 | } |
a939c963 | 2376 | |
c6e6e666 JG |
2377 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2378 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2379 | { | |
2380 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2381 | } | |
2382 | ||
2383 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2384 | { | |
2385 | struct ata_port *ap = qc->ap; | |
2386 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2387 | ||
2388 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2389 | |
2390 | /* FIXME: is this needed? */ | |
7ccd720d | 2391 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
a939c963 | 2392 | |
127102ae | 2393 | #ifdef CONFIG_ATA_SFF |
855d854a JB |
2394 | if (ap->ops->sff_tf_read) |
2395 | ap->ops->sff_tf_read(ap, &qc->tf); | |
127102ae | 2396 | #endif |
c6e6e666 JG |
2397 | |
2398 | /* fill these in, for the case where they are -not- overwritten */ | |
2399 | cmd->sense_buffer[0] = 0x70; | |
2400 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2401 | ||
2402 | ata_qc_reinit(qc); | |
2403 | ||
93f8fecb | 2404 | /* setup sg table and init transfer direction */ |
cadb7345 | 2405 | sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); |
93f8fecb | 2406 | ata_sg_init(qc, &qc->sgent, 1); |
a939c963 JG |
2407 | qc->dma_dir = DMA_FROM_DEVICE; |
2408 | ||
6e7846e9 | 2409 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2410 | qc->cdb[0] = REQUEST_SENSE; |
2411 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2412 | ||
2413 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2414 | qc->tf.command = ATA_CMD_PACKET; | |
2415 | ||
c6e6e666 | 2416 | if (ata_pio_use_silly(ap)) { |
0dc36888 | 2417 | qc->tf.protocol = ATAPI_PROT_DMA; |
c6e6e666 JG |
2418 | qc->tf.feature |= ATAPI_PKT_DMA; |
2419 | } else { | |
0dc36888 | 2420 | qc->tf.protocol = ATAPI_PROT_PIO; |
2db78dd3 AC |
2421 | qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; |
2422 | qc->tf.lbah = 0; | |
c6e6e666 | 2423 | } |
a939c963 JG |
2424 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2425 | ||
c6e6e666 | 2426 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2427 | |
8e0e694a | 2428 | ata_qc_issue(qc); |
a939c963 JG |
2429 | |
2430 | DPRINTK("EXIT\n"); | |
2431 | } | |
2432 | ||
77853bf2 | 2433 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2434 | { |
2435 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2436 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2437 | |
a7dac447 | 2438 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2439 | |
246619da TH |
2440 | /* handle completion from new EH */ |
2441 | if (unlikely(qc->ap->ops->error_handler && | |
2442 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2443 | ||
2444 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2445 | /* FIXME: not quite right; we don't want the | |
2446 | * translation of taskfile registers into a | |
2447 | * sense descriptors, since that's only | |
2448 | * correct for ATA, not ATAPI | |
2449 | */ | |
750426aa | 2450 | ata_gen_passthru_sense(qc); |
246619da TH |
2451 | } |
2452 | ||
22aac089 TH |
2453 | /* SCSI EH automatically locks door if sdev->locked is |
2454 | * set. Sometimes door lock request continues to | |
2455 | * fail, for example, when no media is present. This | |
2456 | * creates a loop - SCSI EH issues door lock which | |
2457 | * fails and gets invoked again to acquire sense data | |
2458 | * for the failed command. | |
2459 | * | |
2460 | * If door lock fails, always clear sdev->locked to | |
2461 | * avoid this infinite loop. | |
2462 | */ | |
2463 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2464 | qc->dev->sdev->locked = 0; | |
2465 | ||
246619da TH |
2466 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2467 | qc->scsidone(cmd); | |
2468 | ata_qc_free(qc); | |
2469 | return; | |
2470 | } | |
2471 | ||
2472 | /* successful completion or old EH failure path */ | |
a7dac447 | 2473 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2474 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2475 | atapi_request_sense(qc); |
77853bf2 | 2476 | return; |
74e6c8c3 | 2477 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2478 | /* FIXME: not quite right; we don't want the |
2479 | * translation of taskfile registers into | |
2480 | * a sense descriptors, since that's only | |
2481 | * correct for ATA, not ATAPI | |
2482 | */ | |
750426aa | 2483 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2484 | } else { |
1da177e4 LT |
2485 | u8 *scsicmd = cmd->cmnd; |
2486 | ||
fd71da46 | 2487 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2488 | u8 *buf = NULL; |
2489 | unsigned int buflen; | |
b445c568 JG |
2490 | unsigned long flags; |
2491 | ||
2492 | local_irq_save(flags); | |
1da177e4 LT |
2493 | |
2494 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2495 | |
2496 | /* ATAPI devices typically report zero for their SCSI version, | |
2497 | * and sometimes deviate from the spec WRT response data | |
2498 | * format. If SCSI version is reported as zero like normal, | |
2499 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2500 | * to indicate to the Linux scsi midlayer this is a modern | |
2501 | * device. 2) Ensure response data format / ATAPI information | |
2502 | * are always correct. | |
a15dbeb4 JG |
2503 | */ |
2504 | if (buf[2] == 0) { | |
2505 | buf[2] = 0x5; | |
2506 | buf[3] = 0x32; | |
2507 | } | |
2508 | ||
1da177e4 | 2509 | ata_scsi_rbuf_put(cmd, buf); |
b445c568 JG |
2510 | |
2511 | local_irq_restore(flags); | |
1da177e4 | 2512 | } |
a15dbeb4 | 2513 | |
1da177e4 LT |
2514 | cmd->result = SAM_STAT_GOOD; |
2515 | } | |
2516 | ||
2517 | qc->scsidone(cmd); | |
77853bf2 | 2518 | ata_qc_free(qc); |
1da177e4 LT |
2519 | } |
2520 | /** | |
2521 | * atapi_xlat - Initialize PACKET taskfile | |
2522 | * @qc: command structure to be initialized | |
1da177e4 LT |
2523 | * |
2524 | * LOCKING: | |
cca3974e | 2525 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2526 | * |
2527 | * RETURNS: | |
2528 | * Zero on success, non-zero on failure. | |
2529 | */ | |
ad706991 | 2530 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2531 | { |
542b1444 | 2532 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 LT |
2533 | struct ata_device *dev = qc->dev; |
2534 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
542b1444 | 2535 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
2db78dd3 | 2536 | unsigned int nbytes; |
1da177e4 | 2537 | |
2e5704f6 TH |
2538 | memset(qc->cdb, 0, dev->cdb_len); |
2539 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2540 | |
2541 | qc->complete_fn = atapi_qc_complete; | |
2542 | ||
2543 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2544 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2545 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2546 | DPRINTK("direction: write\n"); | |
2547 | } | |
2548 | ||
2549 | qc->tf.command = ATA_CMD_PACKET; | |
aacda375 | 2550 | ata_qc_set_pc_nbytes(qc); |
e00f1ff3 TH |
2551 | |
2552 | /* check whether ATAPI DMA is safe */ | |
2553 | if (!using_pio && ata_check_atapi_dma(qc)) | |
2554 | using_pio = 1; | |
1da177e4 | 2555 | |
e190222d TH |
2556 | /* Some controller variants snoop this value for Packet |
2557 | * transfers to do state machine and FIFO management. Thus we | |
2558 | * want to set it properly, and for DMA where it is | |
2559 | * effectively meaningless. | |
2560 | */ | |
aacda375 | 2561 | nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); |
2db78dd3 | 2562 | |
e190222d TH |
2563 | /* Most ATAPI devices which honor transfer chunk size don't |
2564 | * behave according to the spec when odd chunk size which | |
2565 | * matches the transfer length is specified. If the number of | |
2566 | * bytes to transfer is 2n+1. According to the spec, what | |
2567 | * should happen is to indicate that 2n+1 is going to be | |
2568 | * transferred and transfer 2n+2 bytes where the last byte is | |
2569 | * padding. | |
2570 | * | |
2571 | * In practice, this doesn't happen. ATAPI devices first | |
2572 | * indicate and transfer 2n bytes and then indicate and | |
2573 | * transfer 2 bytes where the last byte is padding. | |
2574 | * | |
2575 | * This inconsistency confuses several controllers which | |
2576 | * perform PIO using DMA such as Intel AHCIs and sil3124/32. | |
2577 | * These controllers use actual number of transferred bytes to | |
2578 | * update DMA poitner and transfer of 4n+2 bytes make those | |
2579 | * controller push DMA pointer by 4n+4 bytes because SATA data | |
2580 | * FISes are aligned to 4 bytes. This causes data corruption | |
2581 | * and buffer overrun. | |
2582 | * | |
2583 | * Always setting nbytes to even number solves this problem | |
2584 | * because then ATAPI devices don't have to split data at 2n | |
2585 | * boundaries. | |
2586 | */ | |
2587 | if (nbytes & 0x1) | |
2588 | nbytes++; | |
2589 | ||
2db78dd3 AC |
2590 | qc->tf.lbam = (nbytes & 0xFF); |
2591 | qc->tf.lbah = (nbytes >> 8); | |
2592 | ||
1da177e4 | 2593 | if (using_pio || nodata) { |
e00f1ff3 | 2594 | /* no data, or PIO data xfer */ |
1da177e4 | 2595 | if (nodata) |
0dc36888 | 2596 | qc->tf.protocol = ATAPI_PROT_NODATA; |
1da177e4 | 2597 | else |
0dc36888 | 2598 | qc->tf.protocol = ATAPI_PROT_PIO; |
e00f1ff3 TH |
2599 | } else { |
2600 | /* DMA data xfer */ | |
0dc36888 | 2601 | qc->tf.protocol = ATAPI_PROT_DMA; |
1da177e4 LT |
2602 | qc->tf.feature |= ATAPI_PKT_DMA; |
2603 | ||
91163006 TH |
2604 | if ((dev->flags & ATA_DFLAG_DMADIR) && |
2605 | (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
95de719a | 2606 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2607 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2608 | } |
2609 | ||
2db78dd3 AC |
2610 | |
2611 | /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE | |
2612 | as ATAPI tape drives don't get this right otherwise */ | |
1da177e4 LT |
2613 | return 0; |
2614 | } | |
2615 | ||
2dcb407e | 2616 | static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2617 | { |
071f44b1 | 2618 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2619 | if (likely(devno < ata_link_max_devices(&ap->link))) |
2620 | return &ap->link.device[devno]; | |
2621 | } else { | |
2622 | if (likely(devno < ap->nr_pmp_links)) | |
2623 | return &ap->pmp_link[devno].device[0]; | |
2624 | } | |
2625 | ||
ab5b3a5b TH |
2626 | return NULL; |
2627 | } | |
2628 | ||
2dcb407e JG |
2629 | static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, |
2630 | const struct scsi_device *scsidev) | |
ab5b3a5b | 2631 | { |
41bda9c9 TH |
2632 | int devno; |
2633 | ||
ab5b3a5b | 2634 | /* skip commands not addressed to targets we simulate */ |
071f44b1 | 2635 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
2636 | if (unlikely(scsidev->channel || scsidev->lun)) |
2637 | return NULL; | |
2638 | devno = scsidev->id; | |
2639 | } else { | |
2640 | if (unlikely(scsidev->id || scsidev->lun)) | |
2641 | return NULL; | |
2642 | devno = scsidev->channel; | |
2643 | } | |
ab5b3a5b | 2644 | |
41bda9c9 | 2645 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2646 | } |
2647 | ||
99ba9e09 BK |
2648 | /** |
2649 | * ata_scsi_dev_enabled - determine if device is enabled | |
2650 | * @dev: ATA device | |
2651 | * | |
2652 | * Determine if commands should be sent to the specified device. | |
2653 | * | |
2654 | * LOCKING: | |
cca3974e | 2655 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2656 | * |
2657 | * RETURNS: | |
2658 | * 0 if commands are not allowed / 1 if commands are allowed | |
2659 | */ | |
2660 | ||
2661 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2662 | { | |
2663 | if (unlikely(!ata_dev_enabled(dev))) | |
2664 | return 0; | |
2665 | ||
9af5c9c9 | 2666 | if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) { |
99ba9e09 BK |
2667 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { |
2668 | ata_dev_printk(dev, KERN_WARNING, | |
2669 | "WARNING: ATAPI is %s, device ignored.\n", | |
2670 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2671 | return 0; | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | return 1; | |
2676 | } | |
2677 | ||
1da177e4 LT |
2678 | /** |
2679 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2680 | * @ap: ATA port to which the device is attached | |
2681 | * @scsidev: SCSI device from which we derive the ATA device | |
2682 | * | |
2683 | * Given various information provided in struct scsi_cmnd, | |
2684 | * map that onto an ATA bus, and using that mapping | |
2685 | * determine which ata_device is associated with the | |
2686 | * SCSI command to be sent. | |
2687 | * | |
2688 | * LOCKING: | |
cca3974e | 2689 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2690 | * |
2691 | * RETURNS: | |
2692 | * Associated ATA device, or %NULL if not found. | |
2693 | */ | |
1da177e4 | 2694 | static struct ata_device * |
057ace5e | 2695 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2696 | { |
ab5b3a5b | 2697 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2698 | |
99ba9e09 | 2699 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2700 | return NULL; |
2701 | ||
1da177e4 LT |
2702 | return dev; |
2703 | } | |
2704 | ||
b095518e JG |
2705 | /* |
2706 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2707 | * @byte1: Byte 1 from pass-thru CDB. | |
2708 | * | |
2709 | * RETURNS: | |
2710 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2711 | */ | |
2712 | static u8 | |
2713 | ata_scsi_map_proto(u8 byte1) | |
2714 | { | |
2715 | switch((byte1 & 0x1e) >> 1) { | |
2dcb407e JG |
2716 | case 3: /* Non-data */ |
2717 | return ATA_PROT_NODATA; | |
2718 | ||
2719 | case 6: /* DMA */ | |
2720 | case 10: /* UDMA Data-in */ | |
2721 | case 11: /* UDMA Data-Out */ | |
2722 | return ATA_PROT_DMA; | |
2723 | ||
2724 | case 4: /* PIO Data-in */ | |
2725 | case 5: /* PIO Data-out */ | |
2726 | return ATA_PROT_PIO; | |
2727 | ||
2728 | case 0: /* Hard Reset */ | |
2729 | case 1: /* SRST */ | |
2730 | case 8: /* Device Diagnostic */ | |
2731 | case 9: /* Device Reset */ | |
2732 | case 7: /* DMA Queued */ | |
2733 | case 12: /* FPDMA */ | |
2734 | case 15: /* Return Response Info */ | |
2735 | default: /* Reserved */ | |
2736 | break; | |
b095518e JG |
2737 | } |
2738 | ||
2739 | return ATA_PROT_UNKNOWN; | |
2740 | } | |
2741 | ||
2742 | /** | |
2743 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2744 | * @qc: command structure to be initialized | |
b095518e JG |
2745 | * |
2746 | * Handles either 12 or 16-byte versions of the CDB. | |
2747 | * | |
2748 | * RETURNS: | |
2749 | * Zero on success, non-zero on failure. | |
2750 | */ | |
ad706991 | 2751 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2752 | { |
2753 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2754 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2755 | struct ata_device *dev = qc->dev; |
ad706991 | 2756 | const u8 *cdb = scmd->cmnd; |
b095518e | 2757 | |
542b1444 | 2758 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2759 | goto invalid_fld; |
8190bdb9 | 2760 | |
ae8d4ee7 AC |
2761 | /* |
2762 | * Filter TPM commands by default. These provide an | |
2763 | * essentially uncontrolled encrypted "back door" between | |
2764 | * applications and the disk. Set libata.allow_tpm=1 if you | |
2765 | * have a real reason for wanting to use them. This ensures | |
2766 | * that installed software cannot easily mess stuff up without | |
2767 | * user intent. DVR type users will probably ship with this enabled | |
2768 | * for movie content management. | |
2769 | * | |
2770 | * Note that for ATA8 we can issue a DCS change and DCS freeze lock | |
2771 | * for this and should do in future but that it is not sufficient as | |
2772 | * DCS is an optional feature set. Thus we also do the software filter | |
2773 | * so that we comply with the TC consortium stated goal that the user | |
2774 | * can turn off TC features of their system. | |
2775 | */ | |
2776 | if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) | |
2777 | goto invalid_fld; | |
2778 | ||
f79d409f AC |
2779 | /* We may not issue DMA commands if no DMA mode is set */ |
2780 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2781 | goto invalid_fld; | |
b095518e JG |
2782 | |
2783 | /* | |
2784 | * 12 and 16 byte CDBs use different offsets to | |
2785 | * provide the various register values. | |
2786 | */ | |
542b1444 | 2787 | if (cdb[0] == ATA_16) { |
b095518e JG |
2788 | /* |
2789 | * 16-byte CDB - may contain extended commands. | |
2790 | * | |
2791 | * If that is the case, copy the upper byte register values. | |
2792 | */ | |
542b1444 TH |
2793 | if (cdb[1] & 0x01) { |
2794 | tf->hob_feature = cdb[3]; | |
2795 | tf->hob_nsect = cdb[5]; | |
2796 | tf->hob_lbal = cdb[7]; | |
2797 | tf->hob_lbam = cdb[9]; | |
2798 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2799 | tf->flags |= ATA_TFLAG_LBA48; |
2800 | } else | |
2801 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2802 | ||
2803 | /* | |
2804 | * Always copy low byte, device and command registers. | |
2805 | */ | |
542b1444 TH |
2806 | tf->feature = cdb[4]; |
2807 | tf->nsect = cdb[6]; | |
2808 | tf->lbal = cdb[8]; | |
2809 | tf->lbam = cdb[10]; | |
2810 | tf->lbah = cdb[12]; | |
2811 | tf->device = cdb[13]; | |
2812 | tf->command = cdb[14]; | |
b095518e JG |
2813 | } else { |
2814 | /* | |
2815 | * 12-byte CDB - incapable of extended commands. | |
2816 | */ | |
2817 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2818 | ||
542b1444 TH |
2819 | tf->feature = cdb[3]; |
2820 | tf->nsect = cdb[4]; | |
2821 | tf->lbal = cdb[5]; | |
2822 | tf->lbam = cdb[6]; | |
2823 | tf->lbah = cdb[7]; | |
2824 | tf->device = cdb[8]; | |
2825 | tf->command = cdb[9]; | |
b095518e | 2826 | } |
fa4453c4 AL |
2827 | |
2828 | /* enforce correct master/slave bit */ | |
2829 | tf->device = dev->devno ? | |
2830 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2831 | |
1dce589c AL |
2832 | /* sanity check for pio multi commands */ |
2833 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2834 | goto invalid_fld; | |
2835 | ||
2836 | if (is_multi_taskfile(tf)) { | |
2837 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2838 | ||
2839 | /* compare the passed through multi_count | |
2840 | * with the cached multi_count of libata | |
2841 | */ | |
2842 | if (multi_count != dev->multi_count) | |
2843 | ata_dev_printk(dev, KERN_WARNING, | |
2844 | "invalid multi_count %u ignored\n", | |
2845 | multi_count); | |
d26fc955 | 2846 | } |
1dce589c | 2847 | |
5a5dbd18 ML |
2848 | /* READ/WRITE LONG use a non-standard sect_size */ |
2849 | qc->sect_size = ATA_SECT_SIZE; | |
2850 | switch (tf->command) { | |
2851 | case ATA_CMD_READ_LONG: | |
2852 | case ATA_CMD_READ_LONG_ONCE: | |
2853 | case ATA_CMD_WRITE_LONG: | |
2854 | case ATA_CMD_WRITE_LONG_ONCE: | |
2855 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2856 | goto invalid_fld; | |
7120165c | 2857 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2858 | } |
2859 | ||
b095518e JG |
2860 | /* |
2861 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2862 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2863 | * by an update to hardware-specific registers for each | |
2864 | * controller (i.e. the reason for ->set_piomode(), | |
2865 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2866 | */ | |
2867 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2868 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2869 | goto invalid_fld; |
b095518e JG |
2870 | |
2871 | /* | |
2872 | * Set flags so that all registers will be written, | |
2873 | * and pass on write indication (used for PIO/DMA | |
2874 | * setup.) | |
2875 | */ | |
2876 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2877 | ||
542b1444 | 2878 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2879 | tf->flags |= ATA_TFLAG_WRITE; |
2880 | ||
2881 | /* | |
2882 | * Set transfer length. | |
2883 | * | |
2884 | * TODO: find out if we need to do more here to | |
2885 | * cover scatter/gather case. | |
2886 | */ | |
aacda375 | 2887 | ata_qc_set_pc_nbytes(qc); |
b095518e | 2888 | |
e027bd36 TH |
2889 | /* request result TF and be quiet about device error */ |
2890 | qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; | |
e61e0672 | 2891 | |
b095518e | 2892 | return 0; |
9a405257 TH |
2893 | |
2894 | invalid_fld: | |
542b1444 | 2895 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2896 | /* "Invalid field in cdb" */ |
2897 | return 1; | |
b095518e JG |
2898 | } |
2899 | ||
1da177e4 LT |
2900 | /** |
2901 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2902 | * @dev: ATA device | |
2903 | * @cmd: SCSI command opcode to consider | |
2904 | * | |
2905 | * Look up the SCSI command given, and determine whether the | |
2906 | * SCSI command is to be translated or simulated. | |
2907 | * | |
2908 | * RETURNS: | |
2909 | * Pointer to translation function if possible, %NULL if not. | |
2910 | */ | |
2911 | ||
2912 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2913 | { | |
2914 | switch (cmd) { | |
2915 | case READ_6: | |
2916 | case READ_10: | |
2917 | case READ_16: | |
2918 | ||
2919 | case WRITE_6: | |
2920 | case WRITE_10: | |
2921 | case WRITE_16: | |
2922 | return ata_scsi_rw_xlat; | |
2923 | ||
2924 | case SYNCHRONIZE_CACHE: | |
2925 | if (ata_try_flush_cache(dev)) | |
2926 | return ata_scsi_flush_xlat; | |
2927 | break; | |
2928 | ||
2929 | case VERIFY: | |
2930 | case VERIFY_16: | |
2931 | return ata_scsi_verify_xlat; | |
b095518e JG |
2932 | |
2933 | case ATA_12: | |
2934 | case ATA_16: | |
2935 | return ata_scsi_pass_thru; | |
da61396d | 2936 | |
972dcafb DG |
2937 | case START_STOP: |
2938 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2939 | } |
2940 | ||
2941 | return NULL; | |
2942 | } | |
2943 | ||
2944 | /** | |
2945 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2946 | * @ap: ATA port to which the command was being sent | |
2947 | * @cmd: SCSI command to dump | |
2948 | * | |
2949 | * Prints the contents of a SCSI command via printk(). | |
2950 | */ | |
2951 | ||
2952 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2953 | struct scsi_cmnd *cmd) | |
2954 | { | |
2955 | #ifdef ATA_DEBUG | |
2956 | struct scsi_device *scsidev = cmd->device; | |
2957 | u8 *scsicmd = cmd->cmnd; | |
2958 | ||
2959 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 2960 | ap->print_id, |
1da177e4 LT |
2961 | scsidev->channel, scsidev->id, scsidev->lun, |
2962 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2963 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2964 | scsicmd[8]); | |
2965 | #endif | |
2966 | } | |
2967 | ||
542b1444 | 2968 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2969 | void (*done)(struct scsi_cmnd *), |
2970 | struct ata_device *dev) | |
eb3f0f9c | 2971 | { |
baf4fdfa ML |
2972 | u8 scsi_op = scmd->cmnd[0]; |
2973 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
2974 | int rc = 0; |
2975 | ||
eb3f0f9c | 2976 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
2977 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
2978 | goto bad_cdb_len; | |
eb3f0f9c | 2979 | |
baf4fdfa ML |
2980 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
2981 | } else { | |
2982 | if (unlikely(!scmd->cmd_len)) | |
2983 | goto bad_cdb_len; | |
2984 | ||
2985 | xlat_func = NULL; | |
2986 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
2987 | /* relay SCSI command to ATAPI device */ | |
607126c2 ML |
2988 | int len = COMMAND_SIZE(scsi_op); |
2989 | if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) | |
baf4fdfa ML |
2990 | goto bad_cdb_len; |
2991 | ||
2992 | xlat_func = atapi_xlat; | |
2993 | } else { | |
2994 | /* ATA_16 passthru, treat as an ATA command */ | |
2995 | if (unlikely(scmd->cmd_len > 16)) | |
2996 | goto bad_cdb_len; | |
2997 | ||
2998 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
2999 | } | |
3000 | } | |
3001 | ||
3002 | if (xlat_func) | |
3003 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
3004 | else | |
3005 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
3006 | |
3007 | return rc; | |
baf4fdfa ML |
3008 | |
3009 | bad_cdb_len: | |
3010 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
3011 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
3012 | scmd->result = DID_ERROR << 16; | |
3013 | done(scmd); | |
3014 | return 0; | |
eb3f0f9c BK |
3015 | } |
3016 | ||
1da177e4 LT |
3017 | /** |
3018 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
3019 | * @cmd: SCSI command to be sent | |
3020 | * @done: Completion function, called when command is complete | |
3021 | * | |
3022 | * In some cases, this function translates SCSI commands into | |
3023 | * ATA taskfiles, and queues the taskfiles to be sent to | |
3024 | * hardware. In other cases, this function simulates a | |
3025 | * SCSI device by evaluating and responding to certain | |
3026 | * SCSI commands. This creates the overall effect of | |
3027 | * ATA and ATAPI devices appearing as SCSI devices. | |
3028 | * | |
3029 | * LOCKING: | |
cca3974e | 3030 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
3031 | * |
3032 | * RETURNS: | |
2115ea94 TH |
3033 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3034 | * 0 otherwise. | |
1da177e4 | 3035 | */ |
1da177e4 LT |
3036 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
3037 | { | |
3038 | struct ata_port *ap; | |
3039 | struct ata_device *dev; | |
3040 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 3041 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 3042 | int rc = 0; |
1da177e4 | 3043 | |
35bb94b1 | 3044 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
3045 | |
3046 | spin_unlock(shost->host_lock); | |
ba6a1308 | 3047 | spin_lock(ap->lock); |
1da177e4 LT |
3048 | |
3049 | ata_scsi_dump_cdb(ap, cmd); | |
3050 | ||
3051 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 3052 | if (likely(dev)) |
2115ea94 | 3053 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 3054 | else { |
1da177e4 LT |
3055 | cmd->result = (DID_BAD_TARGET << 16); |
3056 | done(cmd); | |
1da177e4 LT |
3057 | } |
3058 | ||
ba6a1308 | 3059 | spin_unlock(ap->lock); |
005a5a06 | 3060 | spin_lock(shost->host_lock); |
2115ea94 | 3061 | return rc; |
1da177e4 LT |
3062 | } |
3063 | ||
3064 | /** | |
3065 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 3066 | * @dev: the target device |
1da177e4 LT |
3067 | * @cmd: SCSI command being sent to device. |
3068 | * @done: SCSI command completion function. | |
3069 | * | |
3070 | * Interprets and directly executes a select list of SCSI commands | |
3071 | * that can be handled internally. | |
3072 | * | |
3073 | * LOCKING: | |
cca3974e | 3074 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3075 | */ |
3076 | ||
3373efd8 | 3077 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
3078 | void (*done)(struct scsi_cmnd *)) |
3079 | { | |
3080 | struct ata_scsi_args args; | |
057ace5e | 3081 | const u8 *scsicmd = cmd->cmnd; |
45394145 | 3082 | u8 tmp8; |
1da177e4 | 3083 | |
9a3dccc4 TH |
3084 | args.dev = dev; |
3085 | args.id = dev->id; | |
1da177e4 LT |
3086 | args.cmd = cmd; |
3087 | args.done = done; | |
3088 | ||
3089 | switch(scsicmd[0]) { | |
2dcb407e JG |
3090 | /* TODO: worth improving? */ |
3091 | case FORMAT_UNIT: | |
3092 | ata_scsi_invalid_field(cmd, done); | |
3093 | break; | |
3094 | ||
3095 | case INQUIRY: | |
3096 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
00bd0202 | 3097 | ata_scsi_invalid_field(cmd, done); |
2dcb407e JG |
3098 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
3099 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
3100 | else switch (scsicmd[2]) { | |
3101 | case 0x00: | |
3102 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1da177e4 | 3103 | break; |
2dcb407e JG |
3104 | case 0x80: |
3105 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1da177e4 | 3106 | break; |
2dcb407e JG |
3107 | case 0x83: |
3108 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1da177e4 | 3109 | break; |
2dcb407e JG |
3110 | case 0x89: |
3111 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
3112 | break; | |
3113 | default: | |
ae006510 | 3114 | ata_scsi_invalid_field(cmd, done); |
1da177e4 | 3115 | break; |
2dcb407e JG |
3116 | } |
3117 | break; | |
3118 | ||
3119 | case MODE_SENSE: | |
3120 | case MODE_SENSE_10: | |
3121 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
3122 | break; | |
3123 | ||
3124 | case MODE_SELECT: /* unconditionally return */ | |
3125 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
3126 | ata_scsi_invalid_field(cmd, done); | |
3127 | break; | |
1da177e4 | 3128 | |
2dcb407e JG |
3129 | case READ_CAPACITY: |
3130 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
3131 | break; | |
3132 | ||
3133 | case SERVICE_ACTION_IN: | |
3134 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1da177e4 | 3135 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
2dcb407e JG |
3136 | else |
3137 | ata_scsi_invalid_field(cmd, done); | |
3138 | break; | |
1da177e4 | 3139 | |
2dcb407e JG |
3140 | case REPORT_LUNS: |
3141 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
3142 | break; | |
1da177e4 | 3143 | |
2dcb407e JG |
3144 | case REQUEST_SENSE: |
3145 | ata_scsi_set_sense(cmd, 0, 0, 0); | |
3146 | cmd->result = (DRIVER_SENSE << 24); | |
3147 | done(cmd); | |
3148 | break; | |
1da177e4 | 3149 | |
2dcb407e JG |
3150 | /* if we reach this, then writeback caching is disabled, |
3151 | * turning this into a no-op. | |
3152 | */ | |
3153 | case SYNCHRONIZE_CACHE: | |
3154 | /* fall through */ | |
3155 | ||
3156 | /* no-op's, complete with success */ | |
3157 | case REZERO_UNIT: | |
3158 | case SEEK_6: | |
3159 | case SEEK_10: | |
3160 | case TEST_UNIT_READY: | |
3161 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
3162 | break; | |
45394145 | 3163 | |
2dcb407e JG |
3164 | case SEND_DIAGNOSTIC: |
3165 | tmp8 = scsicmd[1] & ~(1 << 3); | |
3166 | if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) | |
00bd0202 | 3167 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
2dcb407e JG |
3168 | else |
3169 | ata_scsi_invalid_field(cmd, done); | |
3170 | break; | |
1da177e4 | 3171 | |
2dcb407e JG |
3172 | /* all other commands */ |
3173 | default: | |
3174 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
3175 | /* "Invalid command operation code" */ | |
3176 | done(cmd); | |
3177 | break; | |
1da177e4 LT |
3178 | } |
3179 | } | |
3180 | ||
f3187195 TH |
3181 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
3182 | { | |
3183 | int i, rc; | |
3184 | ||
3185 | for (i = 0; i < host->n_ports; i++) { | |
3186 | struct ata_port *ap = host->ports[i]; | |
3187 | struct Scsi_Host *shost; | |
3188 | ||
3189 | rc = -ENOMEM; | |
3190 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3191 | if (!shost) | |
3192 | goto err_alloc; | |
3193 | ||
3194 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3195 | ap->scsi_host = shost; | |
3196 | ||
3197 | shost->transportt = &ata_scsi_transport_template; | |
3198 | shost->unique_id = ap->print_id; | |
3199 | shost->max_id = 16; | |
3200 | shost->max_lun = 1; | |
3201 | shost->max_channel = 1; | |
3202 | shost->max_cmd_len = 16; | |
3203 | ||
31cc23b3 TH |
3204 | /* Schedule policy is determined by ->qc_defer() |
3205 | * callback and it needs to see every deferred qc. | |
3206 | * Set host_blocked to 1 to prevent SCSI midlayer from | |
3207 | * automatically deferring requests. | |
3208 | */ | |
3209 | shost->max_host_blocked = 1; | |
3210 | ||
f3187195 TH |
3211 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); |
3212 | if (rc) | |
3213 | goto err_add; | |
3214 | } | |
3215 | ||
3216 | return 0; | |
3217 | ||
3218 | err_add: | |
3219 | scsi_host_put(host->ports[i]->scsi_host); | |
3220 | err_alloc: | |
3221 | while (--i >= 0) { | |
3222 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3223 | ||
3224 | scsi_remove_host(shost); | |
3225 | scsi_host_put(shost); | |
3226 | } | |
3227 | return rc; | |
3228 | } | |
3229 | ||
1ae46317 | 3230 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3231 | { |
1ae46317 TH |
3232 | int tries = 5; |
3233 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3234 | struct ata_link *link; |
1ae46317 | 3235 | struct ata_device *dev; |
644dd0cc | 3236 | |
198e0fed | 3237 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3238 | return; |
3239 | ||
1ae46317 | 3240 | repeat: |
41bda9c9 TH |
3241 | ata_port_for_each_link(link, ap) { |
3242 | ata_link_for_each_dev(dev, link) { | |
3243 | struct scsi_device *sdev; | |
3244 | int channel = 0, id = 0; | |
3edebac4 | 3245 | |
41bda9c9 TH |
3246 | if (!ata_dev_enabled(dev) || dev->sdev) |
3247 | continue; | |
3f19ee8c | 3248 | |
41bda9c9 TH |
3249 | if (ata_is_host_link(link)) |
3250 | id = dev->devno; | |
3251 | else | |
3252 | channel = link->pmp; | |
3253 | ||
3254 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3255 | NULL); | |
3256 | if (!IS_ERR(sdev)) { | |
3257 | dev->sdev = sdev; | |
3258 | scsi_device_put(sdev); | |
3259 | } | |
3edebac4 | 3260 | } |
3f19ee8c | 3261 | } |
1ae46317 TH |
3262 | |
3263 | /* If we scanned while EH was in progress or allocation | |
3264 | * failure occurred, scan would have failed silently. Check | |
3265 | * whether all devices are attached. | |
3266 | */ | |
41bda9c9 TH |
3267 | ata_port_for_each_link(link, ap) { |
3268 | ata_link_for_each_dev(dev, link) { | |
3269 | if (ata_dev_enabled(dev) && !dev->sdev) | |
3270 | goto exit_loop; | |
3271 | } | |
1ae46317 | 3272 | } |
41bda9c9 TH |
3273 | exit_loop: |
3274 | if (!link) | |
1ae46317 TH |
3275 | return; |
3276 | ||
3277 | /* we're missing some SCSI devices */ | |
3278 | if (sync) { | |
3279 | /* If caller requested synchrnous scan && we've made | |
3280 | * any progress, sleep briefly and repeat. | |
3281 | */ | |
3282 | if (dev != last_failed_dev) { | |
3283 | msleep(100); | |
3284 | last_failed_dev = dev; | |
3285 | goto repeat; | |
3286 | } | |
3287 | ||
3288 | /* We might be failing to detect boot device, give it | |
3289 | * a few more chances. | |
3290 | */ | |
3291 | if (--tries) { | |
3292 | msleep(100); | |
3293 | goto repeat; | |
3294 | } | |
3295 | ||
3296 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3297 | "failed without making any progress,\n" | |
3298 | " switching to async\n"); | |
3299 | } | |
3300 | ||
3301 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3302 | round_jiffies_relative(HZ)); | |
644dd0cc | 3303 | } |
0ea035a3 TH |
3304 | |
3305 | /** | |
3306 | * ata_scsi_offline_dev - offline attached SCSI device | |
3307 | * @dev: ATA device to offline attached SCSI device for | |
3308 | * | |
3309 | * This function is called from ata_eh_hotplug() and responsible | |
3310 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3311 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3312 | * against clearing. |
3313 | * | |
3314 | * LOCKING: | |
cca3974e | 3315 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3316 | * |
3317 | * RETURNS: | |
3318 | * 1 if attached SCSI device exists, 0 otherwise. | |
3319 | */ | |
3320 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3321 | { | |
3322 | if (dev->sdev) { | |
3323 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3324 | return 1; | |
3325 | } | |
3326 | return 0; | |
3327 | } | |
580b2102 TH |
3328 | |
3329 | /** | |
3330 | * ata_scsi_remove_dev - remove attached SCSI device | |
3331 | * @dev: ATA device to remove attached SCSI device for | |
3332 | * | |
3333 | * This function is called from ata_eh_scsi_hotplug() and | |
3334 | * responsible for removing the SCSI device attached to @dev. | |
3335 | * | |
3336 | * LOCKING: | |
3337 | * Kernel thread context (may sleep). | |
3338 | */ | |
3339 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3340 | { | |
9af5c9c9 | 3341 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3342 | struct scsi_device *sdev; |
3343 | unsigned long flags; | |
3344 | ||
3345 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3346 | * state doesn't change underneath us and thus | |
3347 | * scsi_device_get() always succeeds. The mutex locking can | |
3348 | * be removed if there is __scsi_device_get() interface which | |
3349 | * increments reference counts regardless of device state. | |
3350 | */ | |
cca3974e | 3351 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3352 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3353 | |
cca3974e | 3354 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3355 | sdev = dev->sdev; |
3356 | dev->sdev = NULL; | |
3357 | ||
3358 | if (sdev) { | |
3359 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3360 | * away underneath us after the host lock and |
580b2102 TH |
3361 | * scan_mutex are released. Hold onto it. |
3362 | */ | |
3363 | if (scsi_device_get(sdev) == 0) { | |
3364 | /* The following ensures the attached sdev is | |
3365 | * offline on return from ata_scsi_offline_dev() | |
3366 | * regardless it wins or loses the race | |
3367 | * against this function. | |
3368 | */ | |
3369 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3370 | } else { | |
3371 | WARN_ON(1); | |
3372 | sdev = NULL; | |
3373 | } | |
3374 | } | |
3375 | ||
ba6a1308 | 3376 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3377 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3378 | |
3379 | if (sdev) { | |
3380 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3381 | sdev->sdev_gendev.bus_id); | |
3382 | ||
3383 | scsi_remove_device(sdev); | |
3384 | scsi_device_put(sdev); | |
3385 | } | |
3386 | } | |
3387 | ||
41bda9c9 TH |
3388 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3389 | { | |
3390 | struct ata_port *ap = link->ap; | |
3391 | struct ata_device *dev; | |
3392 | ||
3393 | ata_link_for_each_dev(dev, link) { | |
3394 | unsigned long flags; | |
3395 | ||
3396 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3397 | continue; | |
3398 | ||
3399 | spin_lock_irqsave(ap->lock, flags); | |
3400 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3401 | spin_unlock_irqrestore(ap->lock, flags); | |
3402 | ||
3403 | ata_scsi_remove_dev(dev); | |
3404 | } | |
3405 | } | |
3406 | ||
2f294968 KCA |
3407 | /** |
3408 | * ata_scsi_media_change_notify - send media change event | |
c5d0e6a0 | 3409 | * @dev: Pointer to the disk device with media change event |
2f294968 KCA |
3410 | * |
3411 | * Tell the block layer to send a media change notification | |
3412 | * event. | |
3413 | * | |
3414 | * LOCKING: | |
854c73a2 | 3415 | * spin_lock_irqsave(host lock) |
2f294968 | 3416 | */ |
854c73a2 | 3417 | void ata_scsi_media_change_notify(struct ata_device *dev) |
2f294968 | 3418 | { |
854c73a2 | 3419 | if (dev->sdev) |
f26792d5 JG |
3420 | sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, |
3421 | GFP_ATOMIC); | |
2f294968 | 3422 | } |
2f294968 | 3423 | |
580b2102 TH |
3424 | /** |
3425 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3426 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3427 | * |
3428 | * Perform SCSI part of hotplug. It's executed from a separate | |
3429 | * workqueue after EH completes. This is necessary because SCSI | |
3430 | * hot plugging requires working EH and hot unplugging is | |
3431 | * synchronized with hot plugging with a mutex. | |
3432 | * | |
3433 | * LOCKING: | |
3434 | * Kernel thread context (may sleep). | |
3435 | */ | |
65f27f38 | 3436 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3437 | { |
65f27f38 DH |
3438 | struct ata_port *ap = |
3439 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3440 | int i; |
580b2102 | 3441 | |
b51e9e5d | 3442 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3443 | DPRINTK("ENTER/EXIT - unloading\n"); |
3444 | return; | |
3445 | } | |
3446 | ||
3447 | DPRINTK("ENTER\n"); | |
3448 | ||
41bda9c9 TH |
3449 | /* Unplug detached devices. We cannot use link iterator here |
3450 | * because PMP links have to be scanned even if PMP is | |
3451 | * currently not attached. Iterate manually. | |
3452 | */ | |
3453 | ata_scsi_handle_link_detach(&ap->link); | |
3454 | if (ap->pmp_link) | |
3455 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3456 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3457 | |
3458 | /* scan for new ones */ | |
1ae46317 | 3459 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3460 | |
3461 | DPRINTK("EXIT\n"); | |
3462 | } | |
83c47bcb TH |
3463 | |
3464 | /** | |
3465 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3466 | * @shost: SCSI host to scan | |
3467 | * @channel: Channel to scan | |
3468 | * @id: ID to scan | |
3469 | * @lun: LUN to scan | |
3470 | * | |
3471 | * This function is called when user explicitly requests bus | |
3472 | * scan. Set probe pending flag and invoke EH. | |
3473 | * | |
3474 | * LOCKING: | |
3475 | * SCSI layer (we don't care) | |
3476 | * | |
3477 | * RETURNS: | |
3478 | * Zero. | |
3479 | */ | |
3480 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3481 | unsigned int id, unsigned int lun) | |
3482 | { | |
3483 | struct ata_port *ap = ata_shost_to_port(shost); | |
3484 | unsigned long flags; | |
41bda9c9 | 3485 | int devno, rc = 0; |
83c47bcb TH |
3486 | |
3487 | if (!ap->ops->error_handler) | |
3488 | return -EOPNOTSUPP; | |
3489 | ||
41bda9c9 | 3490 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3491 | return -EINVAL; |
3492 | ||
071f44b1 | 3493 | if (!sata_pmp_attached(ap)) { |
41bda9c9 TH |
3494 | if (channel != SCAN_WILD_CARD && channel) |
3495 | return -EINVAL; | |
3496 | devno = id; | |
3497 | } else { | |
3498 | if (id != SCAN_WILD_CARD && id) | |
3499 | return -EINVAL; | |
3500 | devno = channel; | |
3501 | } | |
3502 | ||
ba6a1308 | 3503 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3504 | |
41bda9c9 TH |
3505 | if (devno == SCAN_WILD_CARD) { |
3506 | struct ata_link *link; | |
3507 | ||
3508 | ata_port_for_each_link(link, ap) { | |
3509 | struct ata_eh_info *ehi = &link->eh_info; | |
b558eddd | 3510 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 3511 | ehi->action |= ATA_EH_RESET; |
41bda9c9 | 3512 | } |
83c47bcb | 3513 | } else { |
41bda9c9 | 3514 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3515 | |
3516 | if (dev) { | |
41bda9c9 | 3517 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 | 3518 | ehi->probe_mask |= 1 << dev->devno; |
cf480626 | 3519 | ehi->action |= ATA_EH_RESET; |
83c47bcb TH |
3520 | } else |
3521 | rc = -EINVAL; | |
3522 | } | |
3523 | ||
309afcb5 | 3524 | if (rc == 0) { |
83c47bcb | 3525 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3526 | spin_unlock_irqrestore(ap->lock, flags); |
3527 | ata_port_wait_eh(ap); | |
3528 | } else | |
3529 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3530 | |
3531 | return rc; | |
3532 | } | |
3057ac3c | 3533 | |
3534 | /** | |
d0171269 | 3535 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3536 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3537 | * |
d0171269 TH |
3538 | * After ATA pass thru (SAT) commands are executed successfully, |
3539 | * libata need to propagate the changes to SCSI layer. This | |
3540 | * function must be executed from ata_aux_wq such that sdev | |
3541 | * attach/detach don't race with rescan. | |
3057ac3c | 3542 | * |
d0171269 TH |
3543 | * LOCKING: |
3544 | * Kernel thread context (may sleep). | |
3057ac3c | 3545 | */ |
65f27f38 | 3546 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3547 | { |
65f27f38 DH |
3548 | struct ata_port *ap = |
3549 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3550 | struct ata_link *link; |
f58229f8 | 3551 | struct ata_device *dev; |
f84e7e41 | 3552 | unsigned long flags; |
3057ac3c | 3553 | |
f84e7e41 TH |
3554 | spin_lock_irqsave(ap->lock, flags); |
3555 | ||
41bda9c9 TH |
3556 | ata_port_for_each_link(link, ap) { |
3557 | ata_link_for_each_dev(dev, link) { | |
3558 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3559 | |
41bda9c9 TH |
3560 | if (!ata_dev_enabled(dev) || !sdev) |
3561 | continue; | |
3562 | if (scsi_device_get(sdev)) | |
3563 | continue; | |
f84e7e41 | 3564 | |
41bda9c9 TH |
3565 | spin_unlock_irqrestore(ap->lock, flags); |
3566 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3567 | scsi_device_put(sdev); | |
3568 | spin_lock_irqsave(ap->lock, flags); | |
3569 | } | |
3057ac3c | 3570 | } |
f84e7e41 TH |
3571 | |
3572 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3573 | } |
80289167 BK |
3574 | |
3575 | /** | |
3576 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3577 | * @host: ATA host container for all SAS ports |
80289167 | 3578 | * @port_info: Information from low-level host driver |
cca3974e | 3579 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3580 | * |
3581 | * LOCKING: | |
3582 | * PCI/etc. bus probe sem. | |
3583 | * | |
3584 | * RETURNS: | |
3585 | * ata_port pointer on success / NULL on failure. | |
3586 | */ | |
3587 | ||
cca3974e | 3588 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3589 | struct ata_port_info *port_info, |
cca3974e | 3590 | struct Scsi_Host *shost) |
80289167 | 3591 | { |
f3187195 | 3592 | struct ata_port *ap; |
80289167 | 3593 | |
f3187195 | 3594 | ap = ata_port_alloc(host); |
80289167 BK |
3595 | if (!ap) |
3596 | return NULL; | |
3597 | ||
f3187195 | 3598 | ap->port_no = 0; |
cca3974e | 3599 | ap->lock = shost->host_lock; |
f3187195 TH |
3600 | ap->pio_mask = port_info->pio_mask; |
3601 | ap->mwdma_mask = port_info->mwdma_mask; | |
3602 | ap->udma_mask = port_info->udma_mask; | |
3603 | ap->flags |= port_info->flags; | |
3604 | ap->ops = port_info->port_ops; | |
3605 | ap->cbl = ATA_CBL_SATA; | |
3606 | ||
80289167 BK |
3607 | return ap; |
3608 | } | |
3609 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3610 | ||
3611 | /** | |
3612 | * ata_sas_port_start - Set port up for dma. | |
3613 | * @ap: Port to initialize | |
3614 | * | |
3615 | * Called just after data structures for each port are | |
dde20207 | 3616 | * initialized. |
80289167 BK |
3617 | * |
3618 | * May be used as the port_start() entry in ata_port_operations. | |
3619 | * | |
3620 | * LOCKING: | |
3621 | * Inherited from caller. | |
3622 | */ | |
3623 | int ata_sas_port_start(struct ata_port *ap) | |
3624 | { | |
dde20207 | 3625 | return 0; |
80289167 BK |
3626 | } |
3627 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3628 | ||
3629 | /** | |
3630 | * ata_port_stop - Undo ata_sas_port_start() | |
3631 | * @ap: Port to shut down | |
3632 | * | |
80289167 BK |
3633 | * May be used as the port_stop() entry in ata_port_operations. |
3634 | * | |
3635 | * LOCKING: | |
3636 | * Inherited from caller. | |
3637 | */ | |
3638 | ||
3639 | void ata_sas_port_stop(struct ata_port *ap) | |
3640 | { | |
80289167 BK |
3641 | } |
3642 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3643 | ||
3644 | /** | |
3645 | * ata_sas_port_init - Initialize a SATA device | |
3646 | * @ap: SATA port to initialize | |
3647 | * | |
3648 | * LOCKING: | |
3649 | * PCI/etc. bus probe sem. | |
3650 | * | |
3651 | * RETURNS: | |
3652 | * Zero on success, non-zero on error. | |
3653 | */ | |
3654 | ||
3655 | int ata_sas_port_init(struct ata_port *ap) | |
3656 | { | |
3657 | int rc = ap->ops->port_start(ap); | |
3658 | ||
f3187195 TH |
3659 | if (!rc) { |
3660 | ap->print_id = ata_print_id++; | |
80289167 | 3661 | rc = ata_bus_probe(ap); |
f3187195 | 3662 | } |
80289167 BK |
3663 | |
3664 | return rc; | |
3665 | } | |
3666 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3667 | ||
3668 | /** | |
3669 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3670 | * @ap: SATA port to destroy | |
3671 | * | |
3672 | */ | |
3673 | ||
3674 | void ata_sas_port_destroy(struct ata_port *ap) | |
3675 | { | |
f0d36efd TH |
3676 | if (ap->ops->port_stop) |
3677 | ap->ops->port_stop(ap); | |
80289167 BK |
3678 | kfree(ap); |
3679 | } | |
3680 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3681 | ||
3682 | /** | |
3683 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3684 | * @sdev: SCSI device to configure | |
3685 | * @ap: ATA port to which SCSI device is attached | |
3686 | * | |
3687 | * RETURNS: | |
3688 | * Zero. | |
3689 | */ | |
3690 | ||
3691 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3692 | { | |
3693 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3694 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3695 | return 0; |
3696 | } | |
3697 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3698 | ||
3699 | /** | |
3700 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3701 | * @cmd: SCSI command to be sent | |
3702 | * @done: Completion function, called when command is complete | |
3703 | * @ap: ATA port to which the command is being sent | |
3704 | * | |
3705 | * RETURNS: | |
08475a19 BK |
3706 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3707 | * 0 otherwise. | |
80289167 BK |
3708 | */ |
3709 | ||
3710 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3711 | struct ata_port *ap) | |
3712 | { | |
08475a19 BK |
3713 | int rc = 0; |
3714 | ||
80289167 BK |
3715 | ata_scsi_dump_cdb(ap, cmd); |
3716 | ||
9af5c9c9 TH |
3717 | if (likely(ata_scsi_dev_enabled(ap->link.device))) |
3718 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); | |
80289167 BK |
3719 | else { |
3720 | cmd->result = (DID_BAD_TARGET << 16); | |
3721 | done(cmd); | |
3722 | } | |
08475a19 | 3723 | return rc; |
80289167 BK |
3724 | } |
3725 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |