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