Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
1da177e4 | 40 | #include <scsi/scsi_host.h> |
beb40487 | 41 | #include <scsi/scsi_cmnd.h> |
85837ebd | 42 | #include <scsi/scsi_eh.h> |
005a5a06 | 43 | #include <scsi/scsi_device.h> |
a6e6ce8e | 44 | #include <scsi/scsi_tcq.h> |
30afc84c | 45 | #include <scsi/scsi_transport.h> |
1da177e4 | 46 | #include <linux/libata.h> |
b095518e | 47 | #include <linux/hdreg.h> |
1da177e4 LT |
48 | #include <asm/uaccess.h> |
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 TH |
55 | |
56 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
57 | const struct scsi_device *scsidev); | |
58 | static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, | |
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 | ||
74 | static const u8 def_rw_recovery_mpage[] = { | |
75 | RW_RECOVERY_MPAGE, | |
76 | RW_RECOVERY_MPAGE_LEN - 2, | |
77 | (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */ | |
78 | (1 << 6), /* ARRE (auto read reallocation) */ | |
79 | 0, /* read retry count */ | |
80 | 0, 0, 0, 0, | |
81 | 0, /* write retry count */ | |
82 | 0, 0, 0 | |
83 | }; | |
84 | ||
85 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
86 | CACHE_MPAGE, | |
87 | CACHE_MPAGE_LEN - 2, | |
88 | 0, /* contains WCE, needs to be 0 for logic */ | |
89 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
90 | 0, /* contains DRA, needs to be 0 for logic */ | |
91 | 0, 0, 0, 0, 0, 0, 0 | |
92 | }; | |
93 | ||
94 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
95 | CONTROL_MPAGE, | |
96 | CONTROL_MPAGE_LEN - 2, | |
97 | 2, /* DSENSE=0, GLTSD=1 */ | |
98 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
99 | 0, 0, 0, 0, 0xff, 0xff, | |
100 | 0, 30 /* extended self test time, see 05-359r1 */ | |
101 | }; | |
102 | ||
30afc84c TH |
103 | /* |
104 | * libata transport template. libata doesn't do real transport stuff. | |
105 | * It just needs the eh_timed_out hook. | |
106 | */ | |
f3187195 | 107 | static struct scsi_transport_template ata_scsi_transport_template = { |
9227c33d | 108 | .eh_strategy_handler = ata_scsi_error, |
30afc84c | 109 | .eh_timed_out = ata_scsi_timed_out, |
ccf68c34 | 110 | .user_scan = ata_scsi_user_scan, |
30afc84c TH |
111 | }; |
112 | ||
1da177e4 | 113 | |
ae006510 DG |
114 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
115 | void (*done)(struct scsi_cmnd *)) | |
116 | { | |
117 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
118 | /* "Invalid field in cbd" */ | |
119 | done(cmd); | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /** |
123 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
124 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
125 | * @bdev: block device associated with @sdev | |
126 | * @capacity: capacity of SCSI device | |
127 | * @geom: location to which geometry will be output | |
128 | * | |
129 | * Generic bios head/sector/cylinder calculator | |
130 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
131 | * mapping. Some situations may arise where the disk is not | |
132 | * bootable if this is not used. | |
133 | * | |
134 | * LOCKING: | |
135 | * Defined by the SCSI layer. We don't really care. | |
136 | * | |
137 | * RETURNS: | |
138 | * Zero. | |
139 | */ | |
140 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
141 | sector_t capacity, int geom[]) | |
142 | { | |
143 | geom[0] = 255; | |
144 | geom[1] = 63; | |
145 | sector_div(capacity, 255*63); | |
146 | geom[2] = capacity; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
5924b74c TH |
151 | /** |
152 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
153 | * @sdev: SCSI device to get identify data for | |
154 | * @arg: User buffer area for identify data | |
155 | * | |
156 | * LOCKING: | |
157 | * Defined by the SCSI layer. We don't really care. | |
158 | * | |
159 | * RETURNS: | |
160 | * Zero on success, negative errno on error. | |
161 | */ | |
162 | static int ata_get_identity(struct scsi_device *sdev, void __user *arg) | |
163 | { | |
164 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
165 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
166 | u16 __user *dst = arg; | |
167 | char buf[40]; | |
168 | ||
169 | if (!dev) | |
170 | return -ENOMSG; | |
171 | ||
172 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
173 | return -EFAULT; | |
174 | ||
175 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
176 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
177 | return -EFAULT; | |
178 | ||
179 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
180 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
181 | return -EFAULT; | |
182 | ||
183 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
184 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
185 | return -EFAULT; | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
b095518e JG |
190 | /** |
191 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 192 | * @scsidev: Device to which we are issuing command |
b095518e JG |
193 | * @arg: User provided data for issuing command |
194 | * | |
195 | * LOCKING: | |
196 | * Defined by the SCSI layer. We don't really care. | |
197 | * | |
198 | * RETURNS: | |
199 | * Zero on success, negative errno on error. | |
200 | */ | |
b095518e JG |
201 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
202 | { | |
203 | int rc = 0; | |
204 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
bbe1fe7e | 205 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 206 | int argsize = 0; |
85837ebd | 207 | enum dma_data_direction data_dir; |
bbe1fe7e | 208 | int cmd_result; |
b095518e | 209 | |
c893a3ae | 210 | if (arg == NULL) |
b095518e JG |
211 | return -EINVAL; |
212 | ||
213 | if (copy_from_user(args, arg, sizeof(args))) | |
214 | return -EFAULT; | |
215 | ||
bbe1fe7e ET |
216 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
217 | if (!sensebuf) | |
218 | return -ENOMEM; | |
219 | ||
b095518e JG |
220 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
221 | ||
222 | if (args[3]) { | |
223 | argsize = SECTOR_SIZE * args[3]; | |
224 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
225 | if (argbuf == NULL) { |
226 | rc = -ENOMEM; | |
227 | goto error; | |
228 | } | |
b095518e JG |
229 | |
230 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
231 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
232 | block count in sector count field */ | |
85837ebd | 233 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
234 | } else { |
235 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 236 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 237 | data_dir = DMA_NONE; |
b095518e JG |
238 | } |
239 | ||
240 | scsi_cmd[0] = ATA_16; | |
241 | ||
242 | scsi_cmd[4] = args[2]; | |
243 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
244 | scsi_cmd[6] = args[3]; | |
245 | scsi_cmd[8] = args[1]; | |
246 | scsi_cmd[10] = 0x4f; | |
247 | scsi_cmd[12] = 0xc2; | |
248 | } else { | |
249 | scsi_cmd[6] = args[1]; | |
250 | } | |
251 | scsi_cmd[14] = args[0]; | |
252 | ||
253 | /* Good values for timeout and retries? Values below | |
254 | from scsi_ioctl_send_command() for default case... */ | |
bbe1fe7e ET |
255 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
256 | sensebuf, (10*HZ), 5, 0); | |
257 | ||
258 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
259 | u8 *desc = sensebuf + 8; | |
260 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
261 | ||
262 | /* If we set cc then ATA pass-through will cause a | |
263 | * check condition even if no error. Filter that. */ | |
264 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
265 | struct scsi_sense_hdr sshdr; | |
266 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
267 | &sshdr); | |
268 | if (sshdr.sense_key==0 && | |
269 | sshdr.asc==0 && sshdr.ascq==0) | |
270 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; | |
271 | } | |
272 | ||
273 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
274 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
275 | desc[0] == 0x09 ) { /* code is "ATA Descriptor" */ | |
276 | args[0] = desc[13]; /* status */ | |
277 | args[1] = desc[3]; /* error */ | |
278 | args[2] = desc[5]; /* sector count (0:7) */ | |
279 | if (copy_to_user(arg, args, sizeof(args))) | |
280 | rc = -EFAULT; | |
281 | } | |
282 | } | |
283 | ||
284 | ||
285 | if (cmd_result) { | |
b095518e JG |
286 | rc = -EIO; |
287 | goto error; | |
288 | } | |
289 | ||
b095518e | 290 | if ((argbuf) |
c893a3ae | 291 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
292 | rc = -EFAULT; |
293 | error: | |
bbe1fe7e | 294 | kfree(sensebuf); |
8f760780 | 295 | kfree(argbuf); |
b095518e JG |
296 | return rc; |
297 | } | |
298 | ||
299 | /** | |
300 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 301 | * @scsidev: Device to which we are issuing command |
b095518e JG |
302 | * @arg: User provided data for issuing command |
303 | * | |
304 | * LOCKING: | |
305 | * Defined by the SCSI layer. We don't really care. | |
306 | * | |
307 | * RETURNS: | |
308 | * Zero on success, negative errno on error. | |
309 | */ | |
310 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
311 | { | |
312 | int rc = 0; | |
313 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
af068bd1 DM |
314 | u8 args[7], *sensebuf = NULL; |
315 | int cmd_result; | |
b095518e | 316 | |
c893a3ae | 317 | if (arg == NULL) |
b095518e JG |
318 | return -EINVAL; |
319 | ||
320 | if (copy_from_user(args, arg, sizeof(args))) | |
321 | return -EFAULT; | |
322 | ||
af068bd1 DM |
323 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
324 | if (!sensebuf) | |
325 | return -ENOMEM; | |
326 | ||
b095518e JG |
327 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
328 | scsi_cmd[0] = ATA_16; | |
329 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 330 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
331 | scsi_cmd[4] = args[1]; |
332 | scsi_cmd[6] = args[2]; | |
333 | scsi_cmd[8] = args[3]; | |
334 | scsi_cmd[10] = args[4]; | |
335 | scsi_cmd[12] = args[5]; | |
277239f2 | 336 | scsi_cmd[13] = args[6] & 0x4f; |
b095518e JG |
337 | scsi_cmd[14] = args[0]; |
338 | ||
b095518e | 339 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 340 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 DM |
341 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
342 | sensebuf, (10*HZ), 5, 0); | |
343 | ||
344 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
345 | u8 *desc = sensebuf + 8; | |
346 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
347 | ||
348 | /* If we set cc then ATA pass-through will cause a | |
349 | * check condition even if no error. Filter that. */ | |
350 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
351 | struct scsi_sense_hdr sshdr; | |
352 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
353 | &sshdr); | |
354 | if (sshdr.sense_key==0 && | |
355 | sshdr.asc==0 && sshdr.ascq==0) | |
356 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; | |
357 | } | |
358 | ||
359 | /* Send userspace ATA registers */ | |
360 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
361 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
362 | args[0] = desc[13]; /* status */ | |
363 | args[1] = desc[3]; /* error */ | |
364 | args[2] = desc[5]; /* sector count (0:7) */ | |
365 | args[3] = desc[7]; /* lbal */ | |
366 | args[4] = desc[9]; /* lbam */ | |
367 | args[5] = desc[11]; /* lbah */ | |
368 | args[6] = desc[12]; /* select */ | |
369 | if (copy_to_user(arg, args, sizeof(args))) | |
370 | rc = -EFAULT; | |
371 | } | |
372 | } | |
373 | ||
374 | if (cmd_result) { | |
b095518e | 375 | rc = -EIO; |
af068bd1 DM |
376 | goto error; |
377 | } | |
b095518e | 378 | |
af068bd1 DM |
379 | error: |
380 | kfree(sensebuf); | |
b095518e JG |
381 | return rc; |
382 | } | |
383 | ||
1da177e4 LT |
384 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
385 | { | |
1da177e4 LT |
386 | int val = -EINVAL, rc = -EINVAL; |
387 | ||
1da177e4 LT |
388 | switch (cmd) { |
389 | case ATA_IOC_GET_IO32: | |
390 | val = 0; | |
391 | if (copy_to_user(arg, &val, 1)) | |
392 | return -EFAULT; | |
393 | return 0; | |
394 | ||
395 | case ATA_IOC_SET_IO32: | |
396 | val = (unsigned long) arg; | |
397 | if (val != 0) | |
398 | return -EINVAL; | |
399 | return 0; | |
400 | ||
5924b74c TH |
401 | case HDIO_GET_IDENTITY: |
402 | return ata_get_identity(scsidev, arg); | |
403 | ||
b095518e JG |
404 | case HDIO_DRIVE_CMD: |
405 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
406 | return -EACCES; | |
407 | return ata_cmd_ioctl(scsidev, arg); | |
408 | ||
409 | case HDIO_DRIVE_TASK: | |
410 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
411 | return -EACCES; | |
412 | return ata_task_ioctl(scsidev, arg); | |
413 | ||
1da177e4 LT |
414 | default: |
415 | rc = -ENOTTY; | |
416 | break; | |
417 | } | |
418 | ||
1da177e4 LT |
419 | return rc; |
420 | } | |
421 | ||
422 | /** | |
423 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
424 | * @dev: ATA device to which the new command is attached |
425 | * @cmd: SCSI command that originated this ATA command | |
426 | * @done: SCSI command completion function | |
427 | * | |
428 | * Obtain a reference to an unused ata_queued_cmd structure, | |
429 | * which is the basic libata structure representing a single | |
430 | * ATA command sent to the hardware. | |
431 | * | |
432 | * If a command was available, fill in the SCSI-specific | |
433 | * portions of the structure with information on the | |
434 | * current command. | |
435 | * | |
436 | * LOCKING: | |
cca3974e | 437 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
438 | * |
439 | * RETURNS: | |
440 | * Command allocated, or %NULL if none available. | |
441 | */ | |
7102d230 AB |
442 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
443 | struct scsi_cmnd *cmd, | |
444 | void (*done)(struct scsi_cmnd *)) | |
1da177e4 LT |
445 | { |
446 | struct ata_queued_cmd *qc; | |
447 | ||
3373efd8 | 448 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
449 | if (qc) { |
450 | qc->scsicmd = cmd; | |
451 | qc->scsidone = done; | |
452 | ||
7120165c BH |
453 | qc->__sg = scsi_sglist(cmd); |
454 | qc->n_elem = scsi_sg_count(cmd); | |
1da177e4 LT |
455 | } else { |
456 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
457 | done(cmd); | |
458 | } | |
459 | ||
460 | return qc; | |
461 | } | |
462 | ||
b095518e JG |
463 | /** |
464 | * ata_dump_status - user friendly display of error info | |
465 | * @id: id of the port in question | |
466 | * @tf: ptr to filled out taskfile | |
467 | * | |
468 | * Decode and dump the ATA error/status registers for the user so | |
469 | * that they have some idea what really happened at the non | |
470 | * make-believe layer. | |
471 | * | |
472 | * LOCKING: | |
473 | * inherited from caller | |
474 | */ | |
7102d230 | 475 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
b095518e JG |
476 | { |
477 | u8 stat = tf->command, err = tf->feature; | |
478 | ||
479 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
480 | if (stat & ATA_BUSY) { | |
481 | printk("Busy }\n"); /* Data is not valid in this case */ | |
482 | } else { | |
483 | if (stat & 0x40) printk("DriveReady "); | |
484 | if (stat & 0x20) printk("DeviceFault "); | |
485 | if (stat & 0x10) printk("SeekComplete "); | |
486 | if (stat & 0x08) printk("DataRequest "); | |
487 | if (stat & 0x04) printk("CorrectedError "); | |
488 | if (stat & 0x02) printk("Index "); | |
489 | if (stat & 0x01) printk("Error "); | |
490 | printk("}\n"); | |
491 | ||
492 | if (err) { | |
493 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
494 | if (err & 0x04) printk("DriveStatusError "); | |
495 | if (err & 0x80) { | |
496 | if (err & 0x04) printk("BadCRC "); | |
497 | else printk("Sector "); | |
498 | } | |
499 | if (err & 0x40) printk("UncorrectableError "); | |
500 | if (err & 0x10) printk("SectorIdNotFound "); | |
501 | if (err & 0x02) printk("TrackZeroNotFound "); | |
502 | if (err & 0x01) printk("AddrMarkNotFound "); | |
503 | printk("}\n"); | |
504 | } | |
505 | } | |
506 | } | |
507 | ||
1da177e4 LT |
508 | /** |
509 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 510 | * @id: ATA device number |
1da177e4 | 511 | * @drv_stat: value contained in ATA status register |
b095518e JG |
512 | * @drv_err: value contained in ATA error register |
513 | * @sk: the sense key we'll fill out | |
514 | * @asc: the additional sense code we'll fill out | |
515 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 516 | * @verbose: be verbose |
1da177e4 | 517 | * |
b095518e JG |
518 | * Converts an ATA error into a SCSI error. Fill out pointers to |
519 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
520 | * format sense blocks. | |
1da177e4 LT |
521 | * |
522 | * LOCKING: | |
cca3974e | 523 | * spin_lock_irqsave(host lock) |
1da177e4 | 524 | */ |
7102d230 AB |
525 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, |
526 | u8 *asc, u8 *ascq, int verbose) | |
1da177e4 | 527 | { |
b095518e | 528 | int i; |
ffe75ef6 | 529 | |
1da177e4 | 530 | /* Based on the 3ware driver translation table */ |
98ac62de | 531 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
532 | /* BBD|ECC|ID|MAR */ |
533 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
534 | /* BBD|ECC|ID */ | |
535 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
536 | /* ECC|MC|MARK */ | |
537 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
538 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
539 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
540 | /* MC|ID|ABRT|TRK0|MARK */ | |
541 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
542 | /* MCR|MARK */ | |
543 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
544 | /* Bad address mark */ | |
545 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
546 | /* TRK0 */ | |
547 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
548 | /* Abort & !ICRC */ | |
549 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
550 | /* Media change request */ | |
551 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
552 | /* SRV */ | |
553 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
554 | /* Media change */ | |
555 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
556 | /* ECC */ | |
557 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
558 | /* BBD - block marked bad */ | |
559 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
560 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
561 | }; | |
98ac62de | 562 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
563 | /* Must be first because BUSY means no other bits valid */ |
564 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
565 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
566 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
567 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
568 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
569 | }; | |
1da177e4 | 570 | |
1da177e4 LT |
571 | /* |
572 | * Is this an error we can process/parse | |
573 | */ | |
b095518e JG |
574 | if (drv_stat & ATA_BUSY) { |
575 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 576 | } |
b095518e JG |
577 | |
578 | if (drv_err) { | |
579 | /* Look for drv_err */ | |
580 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
581 | /* Look for best matches first */ | |
2e9edbf8 | 582 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
583 | sense_table[i][0]) { |
584 | *sk = sense_table[i][1]; | |
585 | *asc = sense_table[i][2]; | |
586 | *ascq = sense_table[i][3]; | |
587 | goto translate_done; | |
588 | } | |
589 | } | |
590 | /* No immediate match */ | |
246619da TH |
591 | if (verbose) |
592 | printk(KERN_WARNING "ata%u: no sense translation for " | |
593 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 594 | } |
b095518e JG |
595 | |
596 | /* Fall back to interpreting status bits */ | |
597 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
598 | if (stat_table[i][0] & drv_stat) { | |
599 | *sk = stat_table[i][1]; | |
600 | *asc = stat_table[i][2]; | |
601 | *ascq = stat_table[i][3]; | |
602 | goto translate_done; | |
1da177e4 | 603 | } |
b095518e JG |
604 | } |
605 | /* No error? Undecoded? */ | |
246619da TH |
606 | if (verbose) |
607 | printk(KERN_WARNING "ata%u: no sense translation for " | |
608 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 609 | |
2d202024 AC |
610 | /* We need a sensible error return here, which is tricky, and one |
611 | that won't cause people to do things like return a disk wrongly */ | |
612 | *sk = ABORTED_COMMAND; | |
613 | *asc = 0x00; | |
614 | *ascq = 0x00; | |
b095518e JG |
615 | |
616 | translate_done: | |
246619da TH |
617 | if (verbose) |
618 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
619 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
620 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
621 | return; |
622 | } | |
623 | ||
624 | /* | |
750426aa | 625 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
626 | * @qc: Command that completed. |
627 | * | |
628 | * This function is specific to the ATA descriptor format sense | |
629 | * block specified for the ATA pass through commands. Regardless | |
630 | * of whether the command errored or not, return a sense | |
631 | * block. Copy all controller registers into the sense | |
632 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
633 | * | |
634 | * LOCKING: | |
750426aa | 635 | * None. |
b095518e | 636 | */ |
750426aa | 637 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
638 | { |
639 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 640 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
641 | unsigned char *sb = cmd->sense_buffer; |
642 | unsigned char *desc = sb + 8; | |
246619da | 643 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
644 | |
645 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
646 | ||
0e5dec47 | 647 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 648 | |
b095518e JG |
649 | /* |
650 | * Use ata_to_sense_error() to map status register bits | |
651 | * onto sense key, asc & ascq. | |
652 | */ | |
058e55e1 TH |
653 | if (qc->err_mask || |
654 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 655 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
246619da | 656 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 657 | sb[1] &= 0x0f; |
1da177e4 LT |
658 | } |
659 | ||
b095518e JG |
660 | /* |
661 | * Sense data is current and format is descriptor. | |
662 | */ | |
663 | sb[0] = 0x72; | |
1da177e4 | 664 | |
b095518e JG |
665 | desc[0] = 0x09; |
666 | ||
f38621b3 TH |
667 | /* set length of additional sense data */ |
668 | sb[7] = 14; | |
669 | desc[1] = 12; | |
b095518e JG |
670 | |
671 | /* | |
672 | * Copy registers into sense buffer. | |
673 | */ | |
674 | desc[2] = 0x00; | |
675 | desc[3] = tf->feature; /* == error reg */ | |
676 | desc[5] = tf->nsect; | |
677 | desc[7] = tf->lbal; | |
678 | desc[9] = tf->lbam; | |
679 | desc[11] = tf->lbah; | |
680 | desc[12] = tf->device; | |
681 | desc[13] = tf->command; /* == status reg */ | |
682 | ||
683 | /* | |
684 | * Fill in Extend bit, and the high order bytes | |
685 | * if applicable. | |
686 | */ | |
687 | if (tf->flags & ATA_TFLAG_LBA48) { | |
688 | desc[2] |= 0x01; | |
689 | desc[4] = tf->hob_nsect; | |
690 | desc[6] = tf->hob_lbal; | |
691 | desc[8] = tf->hob_lbam; | |
692 | desc[10] = tf->hob_lbah; | |
1da177e4 | 693 | } |
b095518e | 694 | } |
1da177e4 | 695 | |
b095518e | 696 | /** |
750426aa | 697 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
698 | * @qc: Command that we are erroring out |
699 | * | |
d25614ba TH |
700 | * Generate sense block for a failed ATA command @qc. Descriptor |
701 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
702 | * |
703 | * LOCKING: | |
750426aa | 704 | * None. |
b095518e | 705 | */ |
750426aa | 706 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 707 | { |
d25614ba | 708 | struct ata_device *dev = qc->dev; |
b095518e | 709 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 710 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 711 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 712 | unsigned char *desc = sb + 8; |
246619da | 713 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 714 | u64 block; |
b095518e JG |
715 | |
716 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
717 | ||
0e5dec47 | 718 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 719 | |
d25614ba TH |
720 | /* sense data is current and format is descriptor */ |
721 | sb[0] = 0x72; | |
722 | ||
723 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
724 | * onto sense key, asc & ascq. |
725 | */ | |
058e55e1 TH |
726 | if (qc->err_mask || |
727 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
44877b4e | 728 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, |
d25614ba TH |
729 | &sb[1], &sb[2], &sb[3], verbose); |
730 | sb[1] &= 0x0f; | |
1da177e4 | 731 | } |
1da177e4 | 732 | |
d25614ba | 733 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 734 | |
d25614ba TH |
735 | /* information sense data descriptor */ |
736 | sb[7] = 12; | |
737 | desc[0] = 0x00; | |
738 | desc[1] = 10; | |
a7dac447 | 739 | |
d25614ba TH |
740 | desc[2] |= 0x80; /* valid */ |
741 | desc[6] = block >> 40; | |
742 | desc[7] = block >> 32; | |
743 | desc[8] = block >> 24; | |
744 | desc[9] = block >> 16; | |
745 | desc[10] = block >> 8; | |
746 | desc[11] = block; | |
1da177e4 LT |
747 | } |
748 | ||
a6cce2a7 BK |
749 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
750 | { | |
751 | sdev->use_10_for_rw = 1; | |
752 | sdev->use_10_for_ms = 1; | |
753 | } | |
754 | ||
755 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
756 | struct ata_device *dev) | |
757 | { | |
914ed354 TH |
758 | /* configure max sectors */ |
759 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 760 | |
914ed354 | 761 | /* SATA DMA transfers must be multiples of 4 byte, so |
a6cce2a7 BK |
762 | * we need to pad ATAPI transfers using an extra sg. |
763 | * Decrement max hw segments accordingly. | |
764 | */ | |
765 | if (dev->class == ATA_DEV_ATAPI) { | |
165125e1 | 766 | struct request_queue *q = sdev->request_queue; |
a6cce2a7 BK |
767 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); |
768 | } | |
a6e6ce8e TH |
769 | |
770 | if (dev->flags & ATA_DFLAG_NCQ) { | |
771 | int depth; | |
772 | ||
773 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
774 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
775 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
776 | } | |
a6cce2a7 BK |
777 | } |
778 | ||
1da177e4 LT |
779 | /** |
780 | * ata_scsi_slave_config - Set SCSI device attributes | |
781 | * @sdev: SCSI device to examine | |
782 | * | |
783 | * This is called before we actually start reading | |
784 | * and writing to the device, to configure certain | |
785 | * SCSI mid-layer behaviors. | |
786 | * | |
787 | * LOCKING: | |
788 | * Defined by SCSI layer. We don't really care. | |
789 | */ | |
790 | ||
791 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
792 | { | |
31534363 TH |
793 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
794 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
795 | ||
a6cce2a7 | 796 | ata_scsi_sdev_config(sdev); |
1da177e4 LT |
797 | |
798 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
799 | ||
9666f400 TH |
800 | sdev->manage_start_stop = 1; |
801 | ||
31534363 | 802 | if (dev) |
a6cce2a7 | 803 | ata_scsi_dev_config(sdev, dev); |
1da177e4 LT |
804 | |
805 | return 0; /* scsi layer doesn't check return value, sigh */ | |
806 | } | |
807 | ||
83c47bcb TH |
808 | /** |
809 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
810 | * @sdev: SCSI device to be destroyed | |
811 | * | |
812 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
813 | * this unplugging was initiated by libata as indicated by NULL | |
814 | * dev->sdev, this function doesn't have to do anything. | |
815 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
816 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
817 | * EH. | |
818 | * | |
819 | * LOCKING: | |
820 | * Defined by SCSI layer. We don't really care. | |
821 | */ | |
822 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
823 | { | |
824 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
825 | unsigned long flags; | |
826 | struct ata_device *dev; | |
827 | ||
828 | if (!ap->ops->error_handler) | |
829 | return; | |
830 | ||
ba6a1308 | 831 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
832 | dev = __ata_scsi_find_dev(ap, sdev); |
833 | if (dev && dev->sdev) { | |
834 | /* SCSI device already in CANCEL state, no need to offline it */ | |
835 | dev->sdev = NULL; | |
836 | dev->flags |= ATA_DFLAG_DETACH; | |
837 | ata_port_schedule_eh(ap); | |
838 | } | |
ba6a1308 | 839 | spin_unlock_irqrestore(ap->lock, flags); |
83c47bcb TH |
840 | } |
841 | ||
a6e6ce8e TH |
842 | /** |
843 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
844 | * @sdev: SCSI device to configure queue depth for | |
845 | * @queue_depth: new queue depth | |
846 | * | |
847 | * This is libata standard hostt->change_queue_depth callback. | |
848 | * SCSI will call into this callback when user tries to set queue | |
849 | * depth via sysfs. | |
850 | * | |
851 | * LOCKING: | |
852 | * SCSI layer (we don't care) | |
853 | * | |
854 | * RETURNS: | |
855 | * Newly configured queue depth. | |
856 | */ | |
857 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
858 | { | |
859 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
860 | struct ata_device *dev; | |
360f654e | 861 | unsigned long flags; |
a6e6ce8e | 862 | |
c3c70c44 | 863 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
a6e6ce8e TH |
864 | return sdev->queue_depth; |
865 | ||
866 | dev = ata_scsi_find_dev(ap, sdev); | |
867 | if (!dev || !ata_dev_enabled(dev)) | |
868 | return sdev->queue_depth; | |
869 | ||
c3c70c44 | 870 | /* NCQ enabled? */ |
360f654e | 871 | spin_lock_irqsave(ap->lock, flags); |
c3c70c44 TH |
872 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
873 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
360f654e | 874 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
c3c70c44 TH |
875 | queue_depth = 1; |
876 | } | |
360f654e TH |
877 | spin_unlock_irqrestore(ap->lock, flags); |
878 | ||
c3c70c44 TH |
879 | /* limit and apply queue depth */ |
880 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
881 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
882 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
883 | ||
884 | if (sdev->queue_depth == queue_depth) | |
885 | return -EINVAL; | |
886 | ||
887 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
a6e6ce8e TH |
888 | return queue_depth; |
889 | } | |
890 | ||
d9aca22c | 891 | /* XXX: for spindown warning */ |
da071b42 TH |
892 | static void ata_delayed_done_timerfn(unsigned long arg) |
893 | { | |
894 | struct scsi_cmnd *scmd = (void *)arg; | |
895 | ||
896 | scmd->scsi_done(scmd); | |
897 | } | |
898 | ||
d9aca22c | 899 | /* XXX: for spindown warning */ |
da071b42 TH |
900 | static void ata_delayed_done(struct scsi_cmnd *scmd) |
901 | { | |
902 | static struct timer_list timer; | |
903 | ||
904 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
905 | mod_timer(&timer, jiffies + 5 * HZ); | |
906 | } | |
907 | ||
972dcafb DG |
908 | /** |
909 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
910 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
911 | * |
912 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
913 | * (to start). Perhaps these commands should be preceded by | |
914 | * CHECK POWER MODE to see what power mode the device is already in. | |
915 | * [See SAT revision 5 at www.t10.org] | |
916 | * | |
917 | * LOCKING: | |
cca3974e | 918 | * spin_lock_irqsave(host lock) |
972dcafb DG |
919 | * |
920 | * RETURNS: | |
921 | * Zero on success, non-zero on error. | |
922 | */ | |
ad706991 | 923 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 924 | { |
542b1444 | 925 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 926 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 927 | const u8 *cdb = scmd->cmnd; |
972dcafb | 928 | |
2e5704f6 TH |
929 | if (scmd->cmd_len < 5) |
930 | goto invalid_fld; | |
931 | ||
972dcafb DG |
932 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
933 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 934 | if (cdb[1] & 0x1) { |
972dcafb DG |
935 | ; /* ignore IMMED bit, violates sat-r05 */ |
936 | } | |
542b1444 | 937 | if (cdb[4] & 0x2) |
ae006510 | 938 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 939 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 940 | goto invalid_fld; /* power conditions not supported */ |
542b1444 | 941 | if (cdb[4] & 0x1) { |
972dcafb | 942 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
943 | |
944 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 945 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
946 | |
947 | tf->lbah = 0x0; | |
948 | tf->lbam = 0x0; | |
949 | tf->lbal = 0x0; | |
950 | tf->device |= ATA_LBA; | |
951 | } else { | |
952 | /* CHS */ | |
953 | tf->lbal = 0x1; /* sect */ | |
954 | tf->lbam = 0x0; /* cyl low */ | |
955 | tf->lbah = 0x0; /* cyl high */ | |
956 | } | |
957 | ||
972dcafb | 958 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
920a4b10 TH |
959 | } else { |
960 | /* XXX: This is for backward compatibility, will be | |
961 | * removed. Read Documentation/feature-removal-schedule.txt | |
962 | * for more info. | |
963 | */ | |
d9aca22c | 964 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && |
920a4b10 TH |
965 | (system_state == SYSTEM_HALT || |
966 | system_state == SYSTEM_POWER_OFF)) { | |
da071b42 | 967 | static unsigned long warned = 0; |
920a4b10 | 968 | |
da071b42 | 969 | if (!test_and_set_bit(0, &warned)) { |
920a4b10 TH |
970 | ata_dev_printk(qc->dev, KERN_WARNING, |
971 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
972 | "UPDATE SHUTDOWN UTILITY\n"); | |
973 | ata_dev_printk(qc->dev, KERN_WARNING, | |
974 | "For more info, visit " | |
975 | "http://linux-ata.org/shutdown.html\n"); | |
da071b42 TH |
976 | |
977 | /* ->scsi_done is not used, use it for | |
978 | * delayed completion. | |
979 | */ | |
980 | scmd->scsi_done = qc->scsidone; | |
981 | qc->scsidone = ata_delayed_done; | |
920a4b10 TH |
982 | } |
983 | scmd->result = SAM_STAT_GOOD; | |
984 | return 1; | |
985 | } | |
986 | ||
78981a7c RH |
987 | /* Issue ATA STANDBY IMMEDIATE command */ |
988 | tf->command = ATA_CMD_STANDBYNOW1; | |
920a4b10 | 989 | } |
78981a7c | 990 | |
972dcafb DG |
991 | /* |
992 | * Standby and Idle condition timers could be implemented but that | |
993 | * would require libata to implement the Power condition mode page | |
994 | * and allow the user to change it. Changing mode pages requires | |
995 | * MODE SELECT to be implemented. | |
996 | */ | |
997 | ||
998 | return 0; | |
ae006510 DG |
999 | |
1000 | invalid_fld: | |
542b1444 | 1001 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1002 | /* "Invalid field in cbd" */ |
1003 | return 1; | |
972dcafb DG |
1004 | } |
1005 | ||
1006 | ||
1da177e4 LT |
1007 | /** |
1008 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1009 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1010 | * |
1011 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1012 | * FLUSH CACHE EXT. | |
1013 | * | |
1014 | * LOCKING: | |
cca3974e | 1015 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1016 | * |
1017 | * RETURNS: | |
1018 | * Zero on success, non-zero on error. | |
1019 | */ | |
ad706991 | 1020 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1021 | { |
1022 | struct ata_taskfile *tf = &qc->tf; | |
1023 | ||
1024 | tf->flags |= ATA_TFLAG_DEVICE; | |
1025 | tf->protocol = ATA_PROT_NODATA; | |
1026 | ||
6fc49adb | 1027 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1028 | tf->command = ATA_CMD_FLUSH_EXT; |
1029 | else | |
1030 | tf->command = ATA_CMD_FLUSH; | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
3aef5231 AL |
1035 | /** |
1036 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1037 | * @cdb: SCSI command to translate |
3aef5231 AL |
1038 | * |
1039 | * Calculate LBA and transfer length for 6-byte commands. | |
1040 | * | |
1041 | * RETURNS: | |
1042 | * @plba: the LBA | |
1043 | * @plen: the transfer length | |
1044 | */ | |
542b1444 | 1045 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1046 | { |
1047 | u64 lba = 0; | |
6c7b7d2b | 1048 | u32 len; |
3aef5231 AL |
1049 | |
1050 | VPRINTK("six-byte command\n"); | |
1051 | ||
6c7b7d2b | 1052 | lba |= ((u64)(cdb[1] & 0x1f)) << 16; |
542b1444 TH |
1053 | lba |= ((u64)cdb[2]) << 8; |
1054 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1055 | |
6c7b7d2b | 1056 | len = cdb[4]; |
3aef5231 AL |
1057 | |
1058 | *plba = lba; | |
1059 | *plen = len; | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1064 | * @cdb: SCSI command to translate |
3aef5231 AL |
1065 | * |
1066 | * Calculate LBA and transfer length for 10-byte commands. | |
1067 | * | |
1068 | * RETURNS: | |
1069 | * @plba: the LBA | |
1070 | * @plen: the transfer length | |
1071 | */ | |
542b1444 | 1072 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1073 | { |
1074 | u64 lba = 0; | |
1075 | u32 len = 0; | |
1076 | ||
1077 | VPRINTK("ten-byte command\n"); | |
1078 | ||
542b1444 TH |
1079 | lba |= ((u64)cdb[2]) << 24; |
1080 | lba |= ((u64)cdb[3]) << 16; | |
1081 | lba |= ((u64)cdb[4]) << 8; | |
1082 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1083 | |
542b1444 TH |
1084 | len |= ((u32)cdb[7]) << 8; |
1085 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1086 | |
1087 | *plba = lba; | |
1088 | *plen = len; | |
1089 | } | |
1090 | ||
1091 | /** | |
1092 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1093 | * @cdb: SCSI command to translate |
3aef5231 AL |
1094 | * |
1095 | * Calculate LBA and transfer length for 16-byte commands. | |
1096 | * | |
1097 | * RETURNS: | |
1098 | * @plba: the LBA | |
1099 | * @plen: the transfer length | |
1100 | */ | |
542b1444 | 1101 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1102 | { |
1103 | u64 lba = 0; | |
1104 | u32 len = 0; | |
1105 | ||
1106 | VPRINTK("sixteen-byte command\n"); | |
1107 | ||
542b1444 TH |
1108 | lba |= ((u64)cdb[2]) << 56; |
1109 | lba |= ((u64)cdb[3]) << 48; | |
1110 | lba |= ((u64)cdb[4]) << 40; | |
1111 | lba |= ((u64)cdb[5]) << 32; | |
1112 | lba |= ((u64)cdb[6]) << 24; | |
1113 | lba |= ((u64)cdb[7]) << 16; | |
1114 | lba |= ((u64)cdb[8]) << 8; | |
1115 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1116 | |
542b1444 TH |
1117 | len |= ((u32)cdb[10]) << 24; |
1118 | len |= ((u32)cdb[11]) << 16; | |
1119 | len |= ((u32)cdb[12]) << 8; | |
1120 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1121 | |
1122 | *plba = lba; | |
1123 | *plen = len; | |
1124 | } | |
1125 | ||
1da177e4 LT |
1126 | /** |
1127 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1128 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1129 | * |
1130 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1131 | * | |
1132 | * LOCKING: | |
cca3974e | 1133 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1134 | * |
1135 | * RETURNS: | |
1136 | * Zero on success, non-zero on error. | |
1137 | */ | |
ad706991 | 1138 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1139 | { |
542b1444 | 1140 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1141 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1142 | struct ata_device *dev = qc->dev; |
1da177e4 | 1143 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1144 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1145 | u64 block; |
1146 | u32 n_block; | |
1da177e4 LT |
1147 | |
1148 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1149 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1150 | |
2e5704f6 TH |
1151 | if (cdb[0] == VERIFY) { |
1152 | if (scmd->cmd_len < 10) | |
1153 | goto invalid_fld; | |
542b1444 | 1154 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1155 | } else if (cdb[0] == VERIFY_16) { |
1156 | if (scmd->cmd_len < 16) | |
1157 | goto invalid_fld; | |
542b1444 | 1158 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1159 | } else |
ae006510 | 1160 | goto invalid_fld; |
1da177e4 | 1161 | |
8bf62ece | 1162 | if (!n_block) |
ae006510 | 1163 | goto nothing_to_do; |
8bf62ece | 1164 | if (block >= dev_sectors) |
ae006510 | 1165 | goto out_of_range; |
8bf62ece | 1166 | if ((block + n_block) > dev_sectors) |
ae006510 | 1167 | goto out_of_range; |
1da177e4 | 1168 | |
07506697 AL |
1169 | if (dev->flags & ATA_DFLAG_LBA) { |
1170 | tf->flags |= ATA_TFLAG_LBA; | |
1171 | ||
c6a33e24 AL |
1172 | if (lba_28_ok(block, n_block)) { |
1173 | /* use LBA28 */ | |
1174 | tf->command = ATA_CMD_VERIFY; | |
1175 | tf->device |= (block >> 24) & 0xf; | |
1176 | } else if (lba_48_ok(block, n_block)) { | |
1177 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1178 | goto out_of_range; | |
07506697 AL |
1179 | |
1180 | /* use LBA48 */ | |
1181 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1182 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1183 | |
8bf62ece | 1184 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1185 | |
8bf62ece AL |
1186 | tf->hob_lbah = (block >> 40) & 0xff; |
1187 | tf->hob_lbam = (block >> 32) & 0xff; | |
1188 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1189 | } else |
1190 | /* request too large even for LBA48 */ | |
1191 | goto out_of_range; | |
8bf62ece AL |
1192 | |
1193 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1194 | |
8bf62ece AL |
1195 | tf->lbah = (block >> 16) & 0xff; |
1196 | tf->lbam = (block >> 8) & 0xff; | |
1197 | tf->lbal = block & 0xff; | |
1da177e4 | 1198 | |
8bf62ece AL |
1199 | tf->device |= ATA_LBA; |
1200 | } else { | |
1201 | /* CHS */ | |
1202 | u32 sect, head, cyl, track; | |
1203 | ||
c6a33e24 AL |
1204 | if (!lba_28_ok(block, n_block)) |
1205 | goto out_of_range; | |
07506697 | 1206 | |
8bf62ece AL |
1207 | /* Convert LBA to CHS */ |
1208 | track = (u32)block / dev->sectors; | |
1209 | cyl = track / dev->heads; | |
1210 | head = track % dev->heads; | |
1211 | sect = (u32)block % dev->sectors + 1; | |
1212 | ||
c187c4b5 AL |
1213 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1214 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1215 | |
1216 | /* Check whether the converted CHS can fit. | |
1217 | Cylinder: 0-65535 | |
8bf62ece AL |
1218 | Head: 0-15 |
1219 | Sector: 1-255*/ | |
2e9edbf8 | 1220 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1221 | goto out_of_range; |
2e9edbf8 | 1222 | |
8bf62ece AL |
1223 | tf->command = ATA_CMD_VERIFY; |
1224 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1225 | tf->lbal = sect; | |
1226 | tf->lbam = cyl; | |
1227 | tf->lbah = cyl >> 8; | |
1228 | tf->device |= head; | |
1229 | } | |
1da177e4 LT |
1230 | |
1231 | return 0; | |
ae006510 DG |
1232 | |
1233 | invalid_fld: | |
542b1444 | 1234 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1235 | /* "Invalid field in cbd" */ |
1236 | return 1; | |
1237 | ||
1238 | out_of_range: | |
542b1444 | 1239 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1240 | /* "Logical Block Address out of range" */ |
1241 | return 1; | |
1242 | ||
1243 | nothing_to_do: | |
542b1444 | 1244 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1245 | return 1; |
1da177e4 LT |
1246 | } |
1247 | ||
1248 | /** | |
1249 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1250 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1251 | * |
1252 | * Converts any of six SCSI read/write commands into the | |
1253 | * ATA counterpart, including starting sector (LBA), | |
1254 | * sector count, and taking into account the device's LBA48 | |
1255 | * support. | |
1256 | * | |
1257 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1258 | * %WRITE_16 are currently supported. | |
1259 | * | |
1260 | * LOCKING: | |
cca3974e | 1261 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1262 | * |
1263 | * RETURNS: | |
1264 | * Zero on success, non-zero on error. | |
1265 | */ | |
ad706991 | 1266 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1267 | { |
542b1444 | 1268 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1269 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1270 | unsigned int tf_flags = 0; |
3aef5231 AL |
1271 | u64 block; |
1272 | u32 n_block; | |
bd056d7e | 1273 | int rc; |
1da177e4 | 1274 | |
542b1444 | 1275 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1276 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1277 | |
9a3dccc4 | 1278 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1279 | switch (cdb[0]) { |
3aef5231 AL |
1280 | case READ_10: |
1281 | case WRITE_10: | |
2e5704f6 TH |
1282 | if (unlikely(scmd->cmd_len < 10)) |
1283 | goto invalid_fld; | |
542b1444 TH |
1284 | scsi_10_lba_len(cdb, &block, &n_block); |
1285 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1286 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1287 | break; |
1288 | case READ_6: | |
1289 | case WRITE_6: | |
2e5704f6 TH |
1290 | if (unlikely(scmd->cmd_len < 6)) |
1291 | goto invalid_fld; | |
542b1444 | 1292 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1293 | |
1294 | /* for 6-byte r/w commands, transfer length 0 | |
1295 | * means 256 blocks of data, not 0 block. | |
1296 | */ | |
76b2bf9b JG |
1297 | if (!n_block) |
1298 | n_block = 256; | |
3aef5231 AL |
1299 | break; |
1300 | case READ_16: | |
1301 | case WRITE_16: | |
2e5704f6 TH |
1302 | if (unlikely(scmd->cmd_len < 16)) |
1303 | goto invalid_fld; | |
542b1444 TH |
1304 | scsi_16_lba_len(cdb, &block, &n_block); |
1305 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1306 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1307 | break; |
1308 | default: | |
8bf62ece | 1309 | DPRINTK("no-byte command\n"); |
ae006510 | 1310 | goto invalid_fld; |
1da177e4 LT |
1311 | } |
1312 | ||
8bf62ece AL |
1313 | /* Check and compose ATA command */ |
1314 | if (!n_block) | |
c187c4b5 AL |
1315 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1316 | * length 0 means transfer 0 block of data. | |
1317 | * However, for ATA R/W commands, sector count 0 means | |
1318 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1319 | * |
1320 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1321 | */ |
ae006510 | 1322 | goto nothing_to_do; |
1da177e4 | 1323 | |
bd056d7e | 1324 | qc->flags |= ATA_QCFLAG_IO; |
726f0785 | 1325 | qc->nbytes = n_block * ATA_SECT_SIZE; |
1da177e4 | 1326 | |
bd056d7e TH |
1327 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1328 | qc->tag); | |
1329 | if (likely(rc == 0)) | |
1330 | return 0; | |
ae006510 | 1331 | |
bd056d7e TH |
1332 | if (rc == -ERANGE) |
1333 | goto out_of_range; | |
1334 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1335 | invalid_fld: |
542b1444 | 1336 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1337 | /* "Invalid field in cbd" */ |
1338 | return 1; | |
1339 | ||
1340 | out_of_range: | |
542b1444 | 1341 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1342 | /* "Logical Block Address out of range" */ |
1343 | return 1; | |
1344 | ||
1345 | nothing_to_do: | |
542b1444 | 1346 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1347 | return 1; |
1da177e4 LT |
1348 | } |
1349 | ||
77853bf2 | 1350 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1351 | { |
c31f571d | 1352 | struct ata_port *ap = qc->ap; |
1da177e4 | 1353 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1354 | u8 *cdb = cmd->cmnd; |
a22e2eb0 | 1355 | int need_sense = (qc->err_mask != 0); |
b095518e | 1356 | |
3057ac3c | 1357 | /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and |
1358 | * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE | |
1359 | * cache | |
1360 | */ | |
2c3d2a46 AL |
1361 | if (ap->ops->error_handler && !need_sense) { |
1362 | switch (qc->tf.command) { | |
1363 | case ATA_CMD_SET_FEATURES: | |
1364 | if ((qc->tf.feature == SETFEATURES_WC_ON) || | |
1365 | (qc->tf.feature == SETFEATURES_WC_OFF)) { | |
9af5c9c9 | 1366 | ap->link.eh_info.action |= ATA_EH_REVALIDATE; |
2c3d2a46 AL |
1367 | ata_port_schedule_eh(ap); |
1368 | } | |
1369 | break; | |
1370 | ||
1371 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
1372 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
9af5c9c9 | 1373 | ap->link.eh_info.action |= ATA_EH_REVALIDATE; |
2c3d2a46 AL |
1374 | ata_port_schedule_eh(ap); |
1375 | break; | |
1376 | } | |
3057ac3c | 1377 | } |
1378 | ||
b095518e JG |
1379 | /* For ATA pass thru (SAT) commands, generate a sense block if |
1380 | * user mandated it or if there's an error. Note that if we | |
1381 | * generate because the user forced us to, a check condition | |
1382 | * is generated and the ATA register values are returned | |
1383 | * whether the command completed successfully or not. If there | |
1384 | * was no error, SK, ASC and ASCQ will all be zero. | |
1385 | */ | |
a7dac447 JG |
1386 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
1387 | ((cdb[2] & 0x20) || need_sense)) { | |
750426aa | 1388 | ata_gen_passthru_sense(qc); |
b095518e JG |
1389 | } else { |
1390 | if (!need_sense) { | |
1391 | cmd->result = SAM_STAT_GOOD; | |
1392 | } else { | |
1393 | /* TODO: decide which descriptor format to use | |
1394 | * for 48b LBA devices and call that here | |
1395 | * instead of the fixed desc, which is only | |
1396 | * good for smaller LBA (and maybe CHS?) | |
1397 | * devices. | |
1398 | */ | |
750426aa | 1399 | ata_gen_ata_sense(qc); |
b095518e JG |
1400 | } |
1401 | } | |
1da177e4 | 1402 | |
d9aca22c | 1403 | /* XXX: track spindown state for spindown skipping and warning */ |
13b8d09f TH |
1404 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || |
1405 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1406 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1407 | else if (likely(system_state != SYSTEM_HALT && | |
1408 | system_state != SYSTEM_POWER_OFF)) | |
1409 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1410 | ||
c31f571d | 1411 | if (need_sense && !ap->ops->error_handler) |
44877b4e | 1412 | ata_dump_status(ap->print_id, &qc->result_tf); |
1da177e4 LT |
1413 | |
1414 | qc->scsidone(cmd); | |
1415 | ||
77853bf2 | 1416 | ata_qc_free(qc); |
1da177e4 LT |
1417 | } |
1418 | ||
3dc1d881 TH |
1419 | /** |
1420 | * ata_scmd_need_defer - Check whether we need to defer scmd | |
1421 | * @dev: ATA device to which the command is addressed | |
1422 | * @is_io: Is the command IO (and thus possibly NCQ)? | |
1423 | * | |
1424 | * NCQ and non-NCQ commands cannot run together. As upper layer | |
1425 | * only knows the queue depth, we are responsible for maintaining | |
1426 | * exclusion. This function checks whether a new command can be | |
1427 | * issued to @dev. | |
1428 | * | |
1429 | * LOCKING: | |
cca3974e | 1430 | * spin_lock_irqsave(host lock) |
3dc1d881 TH |
1431 | * |
1432 | * RETURNS: | |
1433 | * 1 if deferring is needed, 0 otherwise. | |
1434 | */ | |
1435 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) | |
1436 | { | |
9af5c9c9 | 1437 | struct ata_link *link = dev->link; |
fcf1bf15 | 1438 | int is_ncq = is_io && ata_ncq_enabled(dev); |
3dc1d881 | 1439 | |
fcf1bf15 | 1440 | if (is_ncq) { |
9af5c9c9 | 1441 | if (!ata_tag_valid(link->active_tag)) |
3dc1d881 TH |
1442 | return 0; |
1443 | } else { | |
9af5c9c9 | 1444 | if (!ata_tag_valid(link->active_tag) && !link->sactive) |
3dc1d881 TH |
1445 | return 0; |
1446 | } | |
1447 | return 1; | |
1448 | } | |
1449 | ||
1da177e4 LT |
1450 | /** |
1451 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1452 | * @dev: ATA device to which the command is addressed |
1453 | * @cmd: SCSI command to execute | |
1454 | * @done: SCSI command completion function | |
1455 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1456 | * | |
1457 | * Our ->queuecommand() function has decided that the SCSI | |
1458 | * command issued can be directly translated into an ATA | |
1459 | * command, rather than handled internally. | |
1460 | * | |
1461 | * This function sets up an ata_queued_cmd structure for the | |
1462 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1463 | * | |
ae006510 DG |
1464 | * The xlat_func argument (actor) returns 0 if ready to execute |
1465 | * ATA command, else 1 to finish translation. If 1 is returned | |
1466 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1467 | * to be set reflecting an error condition or clean (early) | |
1468 | * termination. | |
1469 | * | |
1da177e4 | 1470 | * LOCKING: |
cca3974e | 1471 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1472 | * |
1473 | * RETURNS: | |
1474 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1475 | * needs to be deferred. | |
1da177e4 | 1476 | */ |
2115ea94 TH |
1477 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1478 | void (*done)(struct scsi_cmnd *), | |
1479 | ata_xlat_func_t xlat_func) | |
1da177e4 LT |
1480 | { |
1481 | struct ata_queued_cmd *qc; | |
3dc1d881 | 1482 | int is_io = xlat_func == ata_scsi_rw_xlat; |
1da177e4 LT |
1483 | |
1484 | VPRINTK("ENTER\n"); | |
1485 | ||
3dc1d881 TH |
1486 | if (unlikely(ata_scmd_need_defer(dev, is_io))) |
1487 | goto defer; | |
1488 | ||
3373efd8 | 1489 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1490 | if (!qc) |
ae006510 | 1491 | goto err_mem; |
1da177e4 LT |
1492 | |
1493 | /* data is present; dma-map it */ | |
be7db055 | 1494 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1495 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
7120165c | 1496 | if (unlikely(scsi_bufflen(cmd) < 1)) { |
f15a1daf TH |
1497 | ata_dev_printk(dev, KERN_WARNING, |
1498 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1499 | goto err_did; |
1da177e4 LT |
1500 | } |
1501 | ||
7120165c | 1502 | ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); |
1da177e4 LT |
1503 | |
1504 | qc->dma_dir = cmd->sc_data_direction; | |
1505 | } | |
1506 | ||
1507 | qc->complete_fn = ata_scsi_qc_complete; | |
1508 | ||
ad706991 | 1509 | if (xlat_func(qc)) |
ae006510 | 1510 | goto early_finish; |
1da177e4 LT |
1511 | |
1512 | /* select device, send command to hardware */ | |
8e0e694a | 1513 | ata_qc_issue(qc); |
1da177e4 LT |
1514 | |
1515 | VPRINTK("EXIT\n"); | |
2115ea94 | 1516 | return 0; |
1da177e4 | 1517 | |
ae006510 DG |
1518 | early_finish: |
1519 | ata_qc_free(qc); | |
da071b42 | 1520 | qc->scsidone(cmd); |
ae006510 | 1521 | DPRINTK("EXIT - early finish (good or error)\n"); |
2115ea94 | 1522 | return 0; |
ae006510 DG |
1523 | |
1524 | err_did: | |
1da177e4 | 1525 | ata_qc_free(qc); |
ae006510 | 1526 | cmd->result = (DID_ERROR << 16); |
da071b42 | 1527 | qc->scsidone(cmd); |
253b92ec | 1528 | err_mem: |
ae006510 | 1529 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1530 | return 0; |
3dc1d881 TH |
1531 | |
1532 | defer: | |
1533 | DPRINTK("EXIT - defer\n"); | |
1534 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1da177e4 LT |
1535 | } |
1536 | ||
1537 | /** | |
1538 | * ata_scsi_rbuf_get - Map response buffer. | |
1539 | * @cmd: SCSI command containing buffer to be mapped. | |
1540 | * @buf_out: Pointer to mapped area. | |
1541 | * | |
1542 | * Maps buffer contained within SCSI command @cmd. | |
1543 | * | |
1544 | * LOCKING: | |
cca3974e | 1545 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1546 | * |
1547 | * RETURNS: | |
1548 | * Length of response buffer. | |
1549 | */ | |
1550 | ||
1551 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1552 | { | |
1553 | u8 *buf; | |
1554 | unsigned int buflen; | |
1555 | ||
7120165c | 1556 | struct scatterlist *sg = scsi_sglist(cmd); |
1da177e4 | 1557 | |
e10b8c3f | 1558 | if (sg) { |
da02d2a1 | 1559 | buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; |
1da177e4 LT |
1560 | buflen = sg->length; |
1561 | } else { | |
e10b8c3f BH |
1562 | buf = NULL; |
1563 | buflen = 0; | |
1da177e4 LT |
1564 | } |
1565 | ||
1566 | *buf_out = buf; | |
1567 | return buflen; | |
1568 | } | |
1569 | ||
1570 | /** | |
1571 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1572 | * @cmd: SCSI command containing buffer to be unmapped. | |
1573 | * @buf: buffer to unmap | |
1574 | * | |
1575 | * Unmaps response buffer contained within @cmd. | |
1576 | * | |
1577 | * LOCKING: | |
cca3974e | 1578 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1579 | */ |
1580 | ||
1581 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1582 | { | |
7120165c | 1583 | struct scatterlist *sg = scsi_sglist(cmd); |
e10b8c3f | 1584 | if (sg) |
da02d2a1 | 1585 | kunmap_atomic(buf - sg->offset, KM_IRQ0); |
1da177e4 LT |
1586 | } |
1587 | ||
1588 | /** | |
1589 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1590 | * @args: device IDENTIFY data / SCSI command of interest. | |
1591 | * @actor: Callback hook for desired SCSI command simulator | |
1592 | * | |
1593 | * Takes care of the hard work of simulating a SCSI command... | |
1594 | * Mapping the response buffer, calling the command's handler, | |
1595 | * and handling the handler's return value. This return value | |
1596 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1597 | * completed successfully (0), or not (in which case cmd->result |
1598 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1599 | * |
1600 | * LOCKING: | |
cca3974e | 1601 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1602 | */ |
1603 | ||
1604 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1605 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1606 | u8 *rbuf, unsigned int buflen)) | |
1607 | { | |
1608 | u8 *rbuf; | |
1609 | unsigned int buflen, rc; | |
1610 | struct scsi_cmnd *cmd = args->cmd; | |
1611 | ||
1612 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1613 | memset(rbuf, 0, buflen); | |
1614 | rc = actor(args, rbuf, buflen); | |
1615 | ata_scsi_rbuf_put(cmd, rbuf); | |
1616 | ||
ae006510 | 1617 | if (rc == 0) |
1da177e4 | 1618 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1619 | args->done(cmd); |
1da177e4 LT |
1620 | } |
1621 | ||
6a36261e TH |
1622 | /** |
1623 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1624 | * @idx: byte index into SCSI response buffer | |
1625 | * @val: value to set | |
1626 | * | |
1627 | * To be used by SCSI command simulator functions. This macros | |
1628 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1629 | * are in scope. | |
1630 | * | |
1631 | * LOCKING: | |
1632 | * None. | |
1633 | */ | |
1634 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1635 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1636 | } while (0) | |
1637 | ||
1da177e4 LT |
1638 | /** |
1639 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1640 | * @args: device IDENTIFY data / SCSI command of interest. | |
1641 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1642 | * @buflen: Response buffer length. | |
1643 | * | |
1644 | * Returns standard device identification data associated | |
b142eb65 | 1645 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1646 | * |
1647 | * LOCKING: | |
cca3974e | 1648 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1649 | */ |
1650 | ||
1651 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1652 | unsigned int buflen) | |
1653 | { | |
1654 | u8 hdr[] = { | |
1655 | TYPE_DISK, | |
1656 | 0, | |
1657 | 0x5, /* claim SPC-3 version compatibility */ | |
1658 | 2, | |
1659 | 95 - 4 | |
1660 | }; | |
1661 | ||
1662 | /* set scsi removeable (RMB) bit per ata bit */ | |
1663 | if (ata_id_removeable(args->id)) | |
1664 | hdr[1] |= (1 << 7); | |
1665 | ||
1666 | VPRINTK("ENTER\n"); | |
1667 | ||
1668 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1669 | ||
1670 | if (buflen > 35) { | |
1671 | memcpy(&rbuf[8], "ATA ", 8); | |
a0cf733b TH |
1672 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); |
1673 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1da177e4 LT |
1674 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1675 | memcpy(&rbuf[32], "n/a ", 4); | |
1676 | } | |
1677 | ||
1678 | if (buflen > 63) { | |
1679 | const u8 versions[] = { | |
1680 | 0x60, /* SAM-3 (no version claimed) */ | |
1681 | ||
1682 | 0x03, | |
1683 | 0x20, /* SBC-2 (no version claimed) */ | |
1684 | ||
1685 | 0x02, | |
1686 | 0x60 /* SPC-3 (no version claimed) */ | |
1687 | }; | |
1688 | ||
1689 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1690 | } | |
1691 | ||
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | /** | |
b142eb65 | 1696 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1697 | * @args: device IDENTIFY data / SCSI command of interest. |
1698 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1699 | * @buflen: Response buffer length. | |
1700 | * | |
b142eb65 | 1701 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1702 | * |
1703 | * LOCKING: | |
cca3974e | 1704 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1705 | */ |
1706 | ||
1707 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1708 | unsigned int buflen) | |
1709 | { | |
1710 | const u8 pages[] = { | |
1711 | 0x00, /* page 0x00, this page */ | |
1712 | 0x80, /* page 0x80, unit serial no page */ | |
1713 | 0x83 /* page 0x83, device ident page */ | |
1714 | }; | |
b142eb65 | 1715 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1716 | |
1717 | if (buflen > 6) | |
1718 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1719 | ||
1720 | return 0; | |
1721 | } | |
1722 | ||
1723 | /** | |
b142eb65 | 1724 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1725 | * @args: device IDENTIFY data / SCSI command of interest. |
1726 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1727 | * @buflen: Response buffer length. | |
1728 | * | |
1729 | * Returns ATA device serial number. | |
1730 | * | |
1731 | * LOCKING: | |
cca3974e | 1732 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1733 | */ |
1734 | ||
1735 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1736 | unsigned int buflen) | |
1737 | { | |
1738 | const u8 hdr[] = { | |
1739 | 0, | |
1740 | 0x80, /* this page code */ | |
1741 | 0, | |
a0cf733b | 1742 | ATA_ID_SERNO_LEN, /* page len */ |
1da177e4 LT |
1743 | }; |
1744 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1745 | ||
a0cf733b | 1746 | if (buflen > (ATA_ID_SERNO_LEN + 4 - 1)) |
6a62a04d | 1747 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
a0cf733b | 1748 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1da177e4 LT |
1749 | |
1750 | return 0; | |
1751 | } | |
1752 | ||
1da177e4 | 1753 | /** |
b142eb65 | 1754 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1755 | * @args: device IDENTIFY data / SCSI command of interest. |
1756 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1757 | * @buflen: Response buffer length. | |
1758 | * | |
b142eb65 JG |
1759 | * Yields two logical unit device identification designators: |
1760 | * - vendor specific ASCII containing the ATA serial number | |
1761 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1762 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1763 | * |
1764 | * LOCKING: | |
cca3974e | 1765 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1766 | */ |
1767 | ||
1768 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1769 | unsigned int buflen) | |
1770 | { | |
b142eb65 JG |
1771 | int num; |
1772 | const int sat_model_serial_desc_len = 68; | |
1da177e4 | 1773 | |
b142eb65 JG |
1774 | rbuf[1] = 0x83; /* this page code */ |
1775 | num = 4; | |
1776 | ||
a0cf733b | 1777 | if (buflen > (ATA_ID_SERNO_LEN + num + 3)) { |
b142eb65 | 1778 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
2e9edbf8 | 1779 | rbuf[num + 0] = 2; |
a0cf733b | 1780 | rbuf[num + 3] = ATA_ID_SERNO_LEN; |
b142eb65 JG |
1781 | num += 4; |
1782 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1783 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1784 | num += ATA_ID_SERNO_LEN; | |
1da177e4 | 1785 | } |
b142eb65 JG |
1786 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1787 | /* SAT defined lu model and serial numbers descriptor */ | |
1788 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1789 | rbuf[num + 0] = 2; |
1790 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1791 | rbuf[num + 3] = sat_model_serial_desc_len; |
1792 | num += 4; | |
1793 | memcpy(rbuf + num, "ATA ", 8); | |
1794 | num += 8; | |
1795 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
a0cf733b TH |
1796 | ATA_ID_PROD, ATA_ID_PROD_LEN); |
1797 | num += ATA_ID_PROD_LEN; | |
b142eb65 | 1798 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
a0cf733b TH |
1799 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); |
1800 | num += ATA_ID_SERNO_LEN; | |
b142eb65 JG |
1801 | } |
1802 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1803 | return 0; |
1804 | } | |
1805 | ||
ad355b46 JG |
1806 | /** |
1807 | * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info | |
1808 | * @args: device IDENTIFY data / SCSI command of interest. | |
1809 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1810 | * @buflen: Response buffer length. | |
1811 | * | |
1812 | * Yields SAT-specified ATA VPD page. | |
1813 | * | |
1814 | * LOCKING: | |
1815 | * spin_lock_irqsave(host lock) | |
1816 | */ | |
1817 | ||
1818 | unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf, | |
1819 | unsigned int buflen) | |
1820 | { | |
1821 | u8 pbuf[60]; | |
1822 | struct ata_taskfile tf; | |
1823 | unsigned int i; | |
1824 | ||
1825 | if (!buflen) | |
1826 | return 0; | |
1827 | ||
1828 | memset(&pbuf, 0, sizeof(pbuf)); | |
1829 | memset(&tf, 0, sizeof(tf)); | |
1830 | ||
1831 | pbuf[1] = 0x89; /* our page code */ | |
1832 | pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ | |
1833 | pbuf[3] = (0x238 & 0xff); | |
1834 | ||
1835 | memcpy(&pbuf[8], "ATA ", 8); | |
1836 | ata_id_string(args->id, &pbuf[16], ATA_ID_PROD, 16); | |
1837 | ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4); | |
1838 | ||
1839 | /* we don't store the ATA device signature, so we fake it */ | |
1840 | ||
1841 | tf.command = ATA_DRDY; /* really, this is Status reg */ | |
1842 | tf.lbal = 0x1; | |
1843 | tf.nsect = 0x1; | |
1844 | ||
1845 | ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */ | |
1846 | pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ | |
1847 | ||
1848 | pbuf[56] = ATA_CMD_ID_ATA; | |
1849 | ||
1850 | i = min(buflen, 60U); | |
1851 | memcpy(rbuf, &pbuf[0], i); | |
1852 | buflen -= i; | |
1853 | ||
1854 | if (!buflen) | |
1855 | return 0; | |
1856 | ||
1857 | memcpy(&rbuf[60], &args->id[0], min(buflen, 512U)); | |
1858 | return 0; | |
1859 | } | |
1860 | ||
1da177e4 | 1861 | /** |
0cba632b | 1862 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1863 | * @args: device IDENTIFY data / SCSI command of interest. |
1864 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1865 | * @buflen: Response buffer length. | |
1866 | * | |
1867 | * No operation. Simply returns success to caller, to indicate | |
1868 | * that the caller should successfully complete this SCSI command. | |
1869 | * | |
1870 | * LOCKING: | |
cca3974e | 1871 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1872 | */ |
1873 | ||
1874 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1875 | unsigned int buflen) | |
1876 | { | |
1877 | VPRINTK("ENTER\n"); | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | /** | |
1882 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1883 | * @ptr_io: (input/output) Location to store more output data | |
1884 | * @last: End of output data buffer | |
1885 | * @buf: Pointer to BLOB being added to output buffer | |
1886 | * @buflen: Length of BLOB | |
1887 | * | |
1888 | * Store MODE SENSE data on an output buffer. | |
1889 | * | |
1890 | * LOCKING: | |
1891 | * None. | |
1892 | */ | |
1893 | ||
1894 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1895 | const u8 *buf, unsigned int buflen) | |
1896 | { | |
1897 | u8 *ptr = *ptr_io; | |
1898 | ||
1899 | if ((ptr + buflen - 1) > last) | |
1900 | return; | |
1901 | ||
1902 | memcpy(ptr, buf, buflen); | |
1903 | ||
1904 | ptr += buflen; | |
1905 | ||
1906 | *ptr_io = ptr; | |
1907 | } | |
1908 | ||
1909 | /** | |
1910 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1911 | * @id: device IDENTIFY data | |
1912 | * @ptr_io: (input/output) Location to store more output data | |
1913 | * @last: End of output data buffer | |
1914 | * | |
1915 | * Generate a caching info page, which conditionally indicates | |
1916 | * write caching to the SCSI layer, depending on device | |
1917 | * capabilities. | |
1918 | * | |
1919 | * LOCKING: | |
1920 | * None. | |
1921 | */ | |
1922 | ||
1923 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1924 | const u8 *last) | |
1925 | { | |
00ac37f5 | 1926 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1927 | |
00ac37f5 | 1928 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1929 | if (ata_id_wcache_enabled(id)) |
1930 | page[2] |= (1 << 2); /* write cache enable */ | |
1931 | if (!ata_id_rahead_enabled(id)) | |
1932 | page[12] |= (1 << 5); /* disable read ahead */ | |
1933 | ||
1934 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1935 | return sizeof(page); | |
1936 | } | |
1937 | ||
1938 | /** | |
1939 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1940 | * @dev: Device associated with this MODE SENSE command | |
1941 | * @ptr_io: (input/output) Location to store more output data | |
1942 | * @last: End of output data buffer | |
1943 | * | |
1944 | * Generate a generic MODE SENSE control mode page. | |
1945 | * | |
1946 | * LOCKING: | |
1947 | * None. | |
1948 | */ | |
1949 | ||
1950 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1951 | { | |
00ac37f5 DG |
1952 | ata_msense_push(ptr_io, last, def_control_mpage, |
1953 | sizeof(def_control_mpage)); | |
1954 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | /** | |
1958 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1959 | * @dev: Device associated with this MODE SENSE command | |
1960 | * @ptr_io: (input/output) Location to store more output data | |
1961 | * @last: End of output data buffer | |
1962 | * | |
1963 | * Generate a generic MODE SENSE r/w error recovery page. | |
1964 | * | |
1965 | * LOCKING: | |
1966 | * None. | |
1967 | */ | |
1968 | ||
1969 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1970 | { | |
1da177e4 | 1971 | |
00ac37f5 DG |
1972 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
1973 | sizeof(def_rw_recovery_mpage)); | |
1974 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
1975 | } |
1976 | ||
48bdc8ec JA |
1977 | /* |
1978 | * We can turn this into a real blacklist if it's needed, for now just | |
1979 | * blacklist any Maxtor BANC1G10 revision firmware | |
1980 | */ | |
1981 | static int ata_dev_supports_fua(u16 *id) | |
1982 | { | |
a0cf733b | 1983 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; |
48bdc8ec | 1984 | |
c3c013a2 JG |
1985 | if (!libata_fua) |
1986 | return 0; | |
48bdc8ec JA |
1987 | if (!ata_id_has_fua(id)) |
1988 | return 0; | |
1989 | ||
a0cf733b TH |
1990 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
1991 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
48bdc8ec | 1992 | |
2e02671d | 1993 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 1994 | return 1; |
2e02671d | 1995 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
1996 | return 1; |
1997 | ||
1998 | return 0; /* blacklisted */ | |
1999 | } | |
2000 | ||
1da177e4 LT |
2001 | /** |
2002 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2003 | * @args: device IDENTIFY data / SCSI command of interest. | |
2004 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2005 | * @buflen: Response buffer length. | |
2006 | * | |
00ac37f5 DG |
2007 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
2008 | * access devices (e.g. disks) only. There should be no block | |
2009 | * descriptor for other device types. | |
1da177e4 LT |
2010 | * |
2011 | * LOCKING: | |
cca3974e | 2012 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2013 | */ |
2014 | ||
2015 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
2016 | unsigned int buflen) | |
2017 | { | |
9a3dccc4 | 2018 | struct ata_device *dev = args->dev; |
1da177e4 | 2019 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
2020 | const u8 sat_blk_desc[] = { |
2021 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2022 | 0, | |
2023 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2024 | }; | |
2025 | u8 pg, spg; | |
2026 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 2027 | u8 dpofua; |
1da177e4 LT |
2028 | |
2029 | VPRINTK("ENTER\n"); | |
2030 | ||
2031 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2032 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2033 | /* | |
2034 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2035 | */ |
00ac37f5 | 2036 | |
1da177e4 | 2037 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2038 | switch (page_control) { |
2039 | case 0: /* current */ | |
2040 | break; /* supported */ | |
2041 | case 3: /* saved */ | |
2042 | goto saving_not_supp; | |
2043 | case 1: /* changeable */ | |
2044 | case 2: /* defaults */ | |
2045 | default: | |
2046 | goto invalid_fld; | |
2047 | } | |
1da177e4 | 2048 | |
00ac37f5 DG |
2049 | if (six_byte) { |
2050 | output_len = 4 + (ebd ? 8 : 0); | |
2051 | alloc_len = scsicmd[4]; | |
2052 | } else { | |
2053 | output_len = 8 + (ebd ? 8 : 0); | |
2054 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2055 | } | |
2056 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
2057 | |
2058 | p = rbuf + output_len; | |
00ac37f5 | 2059 | last = rbuf + minlen - 1; |
1da177e4 | 2060 | |
00ac37f5 DG |
2061 | pg = scsicmd[2] & 0x3f; |
2062 | spg = scsicmd[3]; | |
2063 | /* | |
2064 | * No mode subpages supported (yet) but asking for _all_ | |
2065 | * subpages may be valid | |
2066 | */ | |
2067 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2068 | goto invalid_fld; | |
2069 | ||
2070 | switch(pg) { | |
2071 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
2072 | output_len += ata_msense_rw_recovery(&p, last); |
2073 | break; | |
2074 | ||
00ac37f5 | 2075 | case CACHE_MPAGE: |
1da177e4 LT |
2076 | output_len += ata_msense_caching(args->id, &p, last); |
2077 | break; | |
2078 | ||
00ac37f5 | 2079 | case CONTROL_MPAGE: { |
1da177e4 LT |
2080 | output_len += ata_msense_ctl_mode(&p, last); |
2081 | break; | |
2082 | } | |
2083 | ||
00ac37f5 | 2084 | case ALL_MPAGES: |
1da177e4 LT |
2085 | output_len += ata_msense_rw_recovery(&p, last); |
2086 | output_len += ata_msense_caching(args->id, &p, last); | |
2087 | output_len += ata_msense_ctl_mode(&p, last); | |
2088 | break; | |
2089 | ||
2090 | default: /* invalid page code */ | |
ae006510 | 2091 | goto invalid_fld; |
1da177e4 LT |
2092 | } |
2093 | ||
00ac37f5 DG |
2094 | if (minlen < 1) |
2095 | return 0; | |
9a3dccc4 TH |
2096 | |
2097 | dpofua = 0; | |
f79d409f | 2098 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2099 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2100 | dpofua = 1 << 4; | |
2101 | ||
1da177e4 LT |
2102 | if (six_byte) { |
2103 | output_len--; | |
2104 | rbuf[0] = output_len; | |
9a3dccc4 TH |
2105 | if (minlen > 2) |
2106 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
2107 | if (ebd) { |
2108 | if (minlen > 3) | |
2109 | rbuf[3] = sizeof(sat_blk_desc); | |
2110 | if (minlen > 11) | |
2111 | memcpy(rbuf + 4, sat_blk_desc, | |
2112 | sizeof(sat_blk_desc)); | |
2113 | } | |
1da177e4 LT |
2114 | } else { |
2115 | output_len -= 2; | |
2116 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
2117 | if (minlen > 1) |
2118 | rbuf[1] = output_len; | |
9a3dccc4 TH |
2119 | if (minlen > 3) |
2120 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
2121 | if (ebd) { |
2122 | if (minlen > 7) | |
2123 | rbuf[7] = sizeof(sat_blk_desc); | |
2124 | if (minlen > 15) | |
2125 | memcpy(rbuf + 8, sat_blk_desc, | |
2126 | sizeof(sat_blk_desc)); | |
2127 | } | |
1da177e4 | 2128 | } |
1da177e4 | 2129 | return 0; |
ae006510 DG |
2130 | |
2131 | invalid_fld: | |
2132 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2133 | /* "Invalid field in cbd" */ | |
2134 | return 1; | |
2135 | ||
2136 | saving_not_supp: | |
2137 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2138 | /* "Saving parameters not supported" */ | |
2139 | return 1; | |
1da177e4 LT |
2140 | } |
2141 | ||
2142 | /** | |
2143 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2144 | * @args: device IDENTIFY data / SCSI command of interest. | |
2145 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2146 | * @buflen: Response buffer length. | |
2147 | * | |
2148 | * Simulate READ CAPACITY commands. | |
2149 | * | |
2150 | * LOCKING: | |
6a36261e | 2151 | * None. |
1da177e4 | 2152 | */ |
1da177e4 LT |
2153 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
2154 | unsigned int buflen) | |
2155 | { | |
6a36261e | 2156 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2157 | |
2158 | VPRINTK("ENTER\n"); | |
2159 | ||
1da177e4 | 2160 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2161 | if (last_lba >= 0xffffffffULL) |
2162 | last_lba = 0xffffffff; | |
0c144d0d | 2163 | |
1da177e4 | 2164 | /* sector count, 32-bit */ |
6a36261e TH |
2165 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); |
2166 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2167 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2168 | ATA_SCSI_RBUF_SET(3, last_lba); | |
1da177e4 LT |
2169 | |
2170 | /* sector size */ | |
6a36261e TH |
2171 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); |
2172 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE); | |
1da177e4 LT |
2173 | } else { |
2174 | /* sector count, 64-bit */ | |
6a36261e TH |
2175 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); |
2176 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2177 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2178 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2179 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2180 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2181 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2182 | ATA_SCSI_RBUF_SET(7, last_lba); | |
1da177e4 LT |
2183 | |
2184 | /* sector size */ | |
6a36261e TH |
2185 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); |
2186 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE); | |
1da177e4 LT |
2187 | } |
2188 | ||
2189 | return 0; | |
2190 | } | |
2191 | ||
2192 | /** | |
2193 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2194 | * @args: device IDENTIFY data / SCSI command of interest. | |
2195 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2196 | * @buflen: Response buffer length. | |
2197 | * | |
2198 | * Simulate REPORT LUNS command. | |
2199 | * | |
2200 | * LOCKING: | |
cca3974e | 2201 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2202 | */ |
2203 | ||
2204 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2205 | unsigned int buflen) | |
2206 | { | |
2207 | VPRINTK("ENTER\n"); | |
2208 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2209 | ||
2210 | return 0; | |
2211 | } | |
2212 | ||
845c5834 DG |
2213 | /** |
2214 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2215 | * @cmd: SCSI request to be handled | |
2216 | * @sk: SCSI-defined sense key | |
2217 | * @asc: SCSI-defined additional sense code | |
2218 | * @ascq: SCSI-defined additional sense code qualifier | |
2219 | * | |
2220 | * Helper function that builds a valid fixed format, current | |
2221 | * response code and the given sense key (sk), additional sense | |
2222 | * code (asc) and additional sense code qualifier (ascq) with | |
2223 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2224 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2225 | * | |
2226 | * LOCKING: | |
2227 | * Not required | |
2228 | */ | |
2229 | ||
2230 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2231 | { | |
2232 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2233 | ||
2234 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2235 | cmd->sense_buffer[2] = sk; | |
2236 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2237 | cmd->sense_buffer[12] = asc; | |
2238 | cmd->sense_buffer[13] = ascq; | |
2239 | } | |
2240 | ||
1da177e4 LT |
2241 | /** |
2242 | * ata_scsi_badcmd - End a SCSI request with an error | |
2243 | * @cmd: SCSI request to be handled | |
2244 | * @done: SCSI command completion function | |
2245 | * @asc: SCSI-defined additional sense code | |
2246 | * @ascq: SCSI-defined additional sense code qualifier | |
2247 | * | |
2248 | * Helper function that completes a SCSI command with | |
2249 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2250 | * and the specified additional sense codes. | |
2251 | * | |
2252 | * LOCKING: | |
cca3974e | 2253 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2254 | */ |
2255 | ||
2256 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2257 | { | |
2258 | DPRINTK("ENTER\n"); | |
ae006510 | 2259 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2260 | |
2261 | done(cmd); | |
2262 | } | |
2263 | ||
77853bf2 | 2264 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2265 | { |
74e6c8c3 | 2266 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2267 | /* FIXME: not quite right; we don't want the |
2268 | * translation of taskfile registers into | |
2269 | * a sense descriptors, since that's only | |
2270 | * correct for ATA, not ATAPI | |
2271 | */ | |
750426aa | 2272 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2273 | } |
a939c963 | 2274 | |
c6e6e666 | 2275 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2276 | ata_qc_free(qc); |
c6e6e666 | 2277 | } |
a939c963 | 2278 | |
c6e6e666 JG |
2279 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2280 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2281 | { | |
2282 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2283 | } | |
2284 | ||
2285 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2286 | { | |
2287 | struct ata_port *ap = qc->ap; | |
2288 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2289 | ||
2290 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2291 | |
2292 | /* FIXME: is this needed? */ | |
2293 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2294 | ||
c6e6e666 JG |
2295 | ap->ops->tf_read(ap, &qc->tf); |
2296 | ||
2297 | /* fill these in, for the case where they are -not- overwritten */ | |
2298 | cmd->sense_buffer[0] = 0x70; | |
2299 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2300 | ||
2301 | ata_qc_reinit(qc); | |
2302 | ||
a939c963 JG |
2303 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
2304 | qc->dma_dir = DMA_FROM_DEVICE; | |
2305 | ||
6e7846e9 | 2306 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2307 | qc->cdb[0] = REQUEST_SENSE; |
2308 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2309 | ||
2310 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2311 | qc->tf.command = ATA_CMD_PACKET; | |
2312 | ||
c6e6e666 JG |
2313 | if (ata_pio_use_silly(ap)) { |
2314 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2315 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2316 | } else { | |
2317 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2318 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2319 | qc->tf.lbah = (8 * 1024) >> 8; | |
2320 | } | |
a939c963 JG |
2321 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2322 | ||
c6e6e666 | 2323 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2324 | |
8e0e694a | 2325 | ata_qc_issue(qc); |
a939c963 JG |
2326 | |
2327 | DPRINTK("EXIT\n"); | |
2328 | } | |
2329 | ||
77853bf2 | 2330 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2331 | { |
2332 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2333 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2334 | |
a7dac447 | 2335 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2336 | |
246619da TH |
2337 | /* handle completion from new EH */ |
2338 | if (unlikely(qc->ap->ops->error_handler && | |
2339 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2340 | ||
2341 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2342 | /* FIXME: not quite right; we don't want the | |
2343 | * translation of taskfile registers into a | |
2344 | * sense descriptors, since that's only | |
2345 | * correct for ATA, not ATAPI | |
2346 | */ | |
750426aa | 2347 | ata_gen_passthru_sense(qc); |
246619da TH |
2348 | } |
2349 | ||
22aac089 TH |
2350 | /* SCSI EH automatically locks door if sdev->locked is |
2351 | * set. Sometimes door lock request continues to | |
2352 | * fail, for example, when no media is present. This | |
2353 | * creates a loop - SCSI EH issues door lock which | |
2354 | * fails and gets invoked again to acquire sense data | |
2355 | * for the failed command. | |
2356 | * | |
2357 | * If door lock fails, always clear sdev->locked to | |
2358 | * avoid this infinite loop. | |
2359 | */ | |
2360 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2361 | qc->dev->sdev->locked = 0; | |
2362 | ||
246619da TH |
2363 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2364 | qc->scsidone(cmd); | |
2365 | ata_qc_free(qc); | |
2366 | return; | |
2367 | } | |
2368 | ||
2369 | /* successful completion or old EH failure path */ | |
a7dac447 | 2370 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2371 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2372 | atapi_request_sense(qc); |
77853bf2 | 2373 | return; |
74e6c8c3 | 2374 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2375 | /* FIXME: not quite right; we don't want the |
2376 | * translation of taskfile registers into | |
2377 | * a sense descriptors, since that's only | |
2378 | * correct for ATA, not ATAPI | |
2379 | */ | |
750426aa | 2380 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2381 | } else { |
1da177e4 LT |
2382 | u8 *scsicmd = cmd->cmnd; |
2383 | ||
fd71da46 | 2384 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2385 | u8 *buf = NULL; |
2386 | unsigned int buflen; | |
2387 | ||
2388 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2389 | |
2390 | /* ATAPI devices typically report zero for their SCSI version, | |
2391 | * and sometimes deviate from the spec WRT response data | |
2392 | * format. If SCSI version is reported as zero like normal, | |
2393 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2394 | * to indicate to the Linux scsi midlayer this is a modern | |
2395 | * device. 2) Ensure response data format / ATAPI information | |
2396 | * are always correct. | |
a15dbeb4 JG |
2397 | */ |
2398 | if (buf[2] == 0) { | |
2399 | buf[2] = 0x5; | |
2400 | buf[3] = 0x32; | |
2401 | } | |
2402 | ||
1da177e4 LT |
2403 | ata_scsi_rbuf_put(cmd, buf); |
2404 | } | |
a15dbeb4 | 2405 | |
1da177e4 LT |
2406 | cmd->result = SAM_STAT_GOOD; |
2407 | } | |
2408 | ||
2409 | qc->scsidone(cmd); | |
77853bf2 | 2410 | ata_qc_free(qc); |
1da177e4 LT |
2411 | } |
2412 | /** | |
2413 | * atapi_xlat - Initialize PACKET taskfile | |
2414 | * @qc: command structure to be initialized | |
1da177e4 LT |
2415 | * |
2416 | * LOCKING: | |
cca3974e | 2417 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2418 | * |
2419 | * RETURNS: | |
2420 | * Zero on success, non-zero on failure. | |
2421 | */ | |
ad706991 | 2422 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2423 | { |
542b1444 | 2424 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 LT |
2425 | struct ata_device *dev = qc->dev; |
2426 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
542b1444 | 2427 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
1da177e4 | 2428 | |
2e5704f6 TH |
2429 | memset(qc->cdb, 0, dev->cdb_len); |
2430 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2431 | |
2432 | qc->complete_fn = atapi_qc_complete; | |
2433 | ||
2434 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2435 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2436 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2437 | DPRINTK("direction: write\n"); | |
2438 | } | |
2439 | ||
2440 | qc->tf.command = ATA_CMD_PACKET; | |
7120165c | 2441 | qc->nbytes = scsi_bufflen(scmd); |
e00f1ff3 TH |
2442 | |
2443 | /* check whether ATAPI DMA is safe */ | |
2444 | if (!using_pio && ata_check_atapi_dma(qc)) | |
2445 | using_pio = 1; | |
1da177e4 | 2446 | |
1da177e4 | 2447 | if (using_pio || nodata) { |
e00f1ff3 | 2448 | /* no data, or PIO data xfer */ |
1da177e4 LT |
2449 | if (nodata) |
2450 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2451 | else | |
2452 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2453 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2454 | qc->tf.lbah = (8 * 1024) >> 8; | |
e00f1ff3 TH |
2455 | } else { |
2456 | /* DMA data xfer */ | |
1da177e4 LT |
2457 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; |
2458 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2459 | ||
542b1444 | 2460 | if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE)) |
95de719a | 2461 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2462 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2463 | } |
2464 | ||
1da177e4 LT |
2465 | return 0; |
2466 | } | |
2467 | ||
41bda9c9 | 2468 | static struct ata_device * ata_find_dev(struct ata_port *ap, int devno) |
ab5b3a5b | 2469 | { |
41bda9c9 TH |
2470 | if (ap->nr_pmp_links == 0) { |
2471 | if (likely(devno < ata_link_max_devices(&ap->link))) | |
2472 | return &ap->link.device[devno]; | |
2473 | } else { | |
2474 | if (likely(devno < ap->nr_pmp_links)) | |
2475 | return &ap->pmp_link[devno].device[0]; | |
2476 | } | |
2477 | ||
ab5b3a5b TH |
2478 | return NULL; |
2479 | } | |
2480 | ||
2481 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
2482 | const struct scsi_device *scsidev) | |
2483 | { | |
41bda9c9 TH |
2484 | int devno; |
2485 | ||
ab5b3a5b | 2486 | /* skip commands not addressed to targets we simulate */ |
41bda9c9 TH |
2487 | if (ap->nr_pmp_links == 0) { |
2488 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2489 | return NULL; | |
2490 | devno = scsidev->id; | |
2491 | } else { | |
2492 | if (unlikely(scsidev->id || scsidev->lun)) | |
2493 | return NULL; | |
2494 | devno = scsidev->channel; | |
2495 | } | |
ab5b3a5b | 2496 | |
41bda9c9 | 2497 | return ata_find_dev(ap, devno); |
ab5b3a5b TH |
2498 | } |
2499 | ||
99ba9e09 BK |
2500 | /** |
2501 | * ata_scsi_dev_enabled - determine if device is enabled | |
2502 | * @dev: ATA device | |
2503 | * | |
2504 | * Determine if commands should be sent to the specified device. | |
2505 | * | |
2506 | * LOCKING: | |
cca3974e | 2507 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2508 | * |
2509 | * RETURNS: | |
2510 | * 0 if commands are not allowed / 1 if commands are allowed | |
2511 | */ | |
2512 | ||
2513 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2514 | { | |
2515 | if (unlikely(!ata_dev_enabled(dev))) | |
2516 | return 0; | |
2517 | ||
9af5c9c9 | 2518 | if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) { |
99ba9e09 BK |
2519 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { |
2520 | ata_dev_printk(dev, KERN_WARNING, | |
2521 | "WARNING: ATAPI is %s, device ignored.\n", | |
2522 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2523 | return 0; | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | return 1; | |
2528 | } | |
2529 | ||
1da177e4 LT |
2530 | /** |
2531 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2532 | * @ap: ATA port to which the device is attached | |
2533 | * @scsidev: SCSI device from which we derive the ATA device | |
2534 | * | |
2535 | * Given various information provided in struct scsi_cmnd, | |
2536 | * map that onto an ATA bus, and using that mapping | |
2537 | * determine which ata_device is associated with the | |
2538 | * SCSI command to be sent. | |
2539 | * | |
2540 | * LOCKING: | |
cca3974e | 2541 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2542 | * |
2543 | * RETURNS: | |
2544 | * Associated ATA device, or %NULL if not found. | |
2545 | */ | |
1da177e4 | 2546 | static struct ata_device * |
057ace5e | 2547 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2548 | { |
ab5b3a5b | 2549 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2550 | |
99ba9e09 | 2551 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2552 | return NULL; |
2553 | ||
1da177e4 LT |
2554 | return dev; |
2555 | } | |
2556 | ||
b095518e JG |
2557 | /* |
2558 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2559 | * @byte1: Byte 1 from pass-thru CDB. | |
2560 | * | |
2561 | * RETURNS: | |
2562 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2563 | */ | |
2564 | static u8 | |
2565 | ata_scsi_map_proto(u8 byte1) | |
2566 | { | |
2567 | switch((byte1 & 0x1e) >> 1) { | |
2568 | case 3: /* Non-data */ | |
2569 | return ATA_PROT_NODATA; | |
2570 | ||
2571 | case 6: /* DMA */ | |
23cb1d71 AL |
2572 | case 10: /* UDMA Data-in */ |
2573 | case 11: /* UDMA Data-Out */ | |
b095518e JG |
2574 | return ATA_PROT_DMA; |
2575 | ||
2576 | case 4: /* PIO Data-in */ | |
2577 | case 5: /* PIO Data-out */ | |
b095518e JG |
2578 | return ATA_PROT_PIO; |
2579 | ||
b095518e JG |
2580 | case 0: /* Hard Reset */ |
2581 | case 1: /* SRST */ | |
f93f1078 AL |
2582 | case 8: /* Device Diagnostic */ |
2583 | case 9: /* Device Reset */ | |
2584 | case 7: /* DMA Queued */ | |
f93f1078 AL |
2585 | case 12: /* FPDMA */ |
2586 | case 15: /* Return Response Info */ | |
b095518e JG |
2587 | default: /* Reserved */ |
2588 | break; | |
2589 | } | |
2590 | ||
2591 | return ATA_PROT_UNKNOWN; | |
2592 | } | |
2593 | ||
2594 | /** | |
2595 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2596 | * @qc: command structure to be initialized | |
b095518e JG |
2597 | * |
2598 | * Handles either 12 or 16-byte versions of the CDB. | |
2599 | * | |
2600 | * RETURNS: | |
2601 | * Zero on success, non-zero on failure. | |
2602 | */ | |
ad706991 | 2603 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2604 | { |
2605 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2606 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2607 | struct ata_device *dev = qc->dev; |
ad706991 | 2608 | const u8 *cdb = scmd->cmnd; |
b095518e | 2609 | |
542b1444 | 2610 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2611 | goto invalid_fld; |
8190bdb9 | 2612 | |
f79d409f AC |
2613 | /* We may not issue DMA commands if no DMA mode is set */ |
2614 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2615 | goto invalid_fld; | |
b095518e JG |
2616 | |
2617 | /* | |
2618 | * 12 and 16 byte CDBs use different offsets to | |
2619 | * provide the various register values. | |
2620 | */ | |
542b1444 | 2621 | if (cdb[0] == ATA_16) { |
b095518e JG |
2622 | /* |
2623 | * 16-byte CDB - may contain extended commands. | |
2624 | * | |
2625 | * If that is the case, copy the upper byte register values. | |
2626 | */ | |
542b1444 TH |
2627 | if (cdb[1] & 0x01) { |
2628 | tf->hob_feature = cdb[3]; | |
2629 | tf->hob_nsect = cdb[5]; | |
2630 | tf->hob_lbal = cdb[7]; | |
2631 | tf->hob_lbam = cdb[9]; | |
2632 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2633 | tf->flags |= ATA_TFLAG_LBA48; |
2634 | } else | |
2635 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2636 | ||
2637 | /* | |
2638 | * Always copy low byte, device and command registers. | |
2639 | */ | |
542b1444 TH |
2640 | tf->feature = cdb[4]; |
2641 | tf->nsect = cdb[6]; | |
2642 | tf->lbal = cdb[8]; | |
2643 | tf->lbam = cdb[10]; | |
2644 | tf->lbah = cdb[12]; | |
2645 | tf->device = cdb[13]; | |
2646 | tf->command = cdb[14]; | |
b095518e JG |
2647 | } else { |
2648 | /* | |
2649 | * 12-byte CDB - incapable of extended commands. | |
2650 | */ | |
2651 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2652 | ||
542b1444 TH |
2653 | tf->feature = cdb[3]; |
2654 | tf->nsect = cdb[4]; | |
2655 | tf->lbal = cdb[5]; | |
2656 | tf->lbam = cdb[6]; | |
2657 | tf->lbah = cdb[7]; | |
2658 | tf->device = cdb[8]; | |
2659 | tf->command = cdb[9]; | |
b095518e | 2660 | } |
fa4453c4 AL |
2661 | |
2662 | /* enforce correct master/slave bit */ | |
2663 | tf->device = dev->devno ? | |
2664 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e | 2665 | |
1dce589c AL |
2666 | /* sanity check for pio multi commands */ |
2667 | if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) | |
2668 | goto invalid_fld; | |
2669 | ||
2670 | if (is_multi_taskfile(tf)) { | |
2671 | unsigned int multi_count = 1 << (cdb[1] >> 5); | |
2672 | ||
2673 | /* compare the passed through multi_count | |
2674 | * with the cached multi_count of libata | |
2675 | */ | |
2676 | if (multi_count != dev->multi_count) | |
2677 | ata_dev_printk(dev, KERN_WARNING, | |
2678 | "invalid multi_count %u ignored\n", | |
2679 | multi_count); | |
d26fc955 | 2680 | } |
1dce589c | 2681 | |
5a5dbd18 ML |
2682 | /* READ/WRITE LONG use a non-standard sect_size */ |
2683 | qc->sect_size = ATA_SECT_SIZE; | |
2684 | switch (tf->command) { | |
2685 | case ATA_CMD_READ_LONG: | |
2686 | case ATA_CMD_READ_LONG_ONCE: | |
2687 | case ATA_CMD_WRITE_LONG: | |
2688 | case ATA_CMD_WRITE_LONG_ONCE: | |
2689 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2690 | goto invalid_fld; | |
7120165c | 2691 | qc->sect_size = scsi_bufflen(scmd); |
5a5dbd18 ML |
2692 | } |
2693 | ||
b095518e JG |
2694 | /* |
2695 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2696 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2697 | * by an update to hardware-specific registers for each | |
2698 | * controller (i.e. the reason for ->set_piomode(), | |
2699 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2700 | */ | |
2701 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2702 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2703 | goto invalid_fld; |
b095518e JG |
2704 | |
2705 | /* | |
2706 | * Set flags so that all registers will be written, | |
2707 | * and pass on write indication (used for PIO/DMA | |
2708 | * setup.) | |
2709 | */ | |
2710 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2711 | ||
542b1444 | 2712 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2713 | tf->flags |= ATA_TFLAG_WRITE; |
2714 | ||
2715 | /* | |
2716 | * Set transfer length. | |
2717 | * | |
2718 | * TODO: find out if we need to do more here to | |
2719 | * cover scatter/gather case. | |
2720 | */ | |
7120165c | 2721 | qc->nbytes = scsi_bufflen(scmd); |
b095518e | 2722 | |
e61e0672 TH |
2723 | /* request result TF */ |
2724 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2725 | ||
b095518e | 2726 | return 0; |
9a405257 TH |
2727 | |
2728 | invalid_fld: | |
542b1444 | 2729 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2730 | /* "Invalid field in cdb" */ |
2731 | return 1; | |
b095518e JG |
2732 | } |
2733 | ||
1da177e4 LT |
2734 | /** |
2735 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2736 | * @dev: ATA device | |
2737 | * @cmd: SCSI command opcode to consider | |
2738 | * | |
2739 | * Look up the SCSI command given, and determine whether the | |
2740 | * SCSI command is to be translated or simulated. | |
2741 | * | |
2742 | * RETURNS: | |
2743 | * Pointer to translation function if possible, %NULL if not. | |
2744 | */ | |
2745 | ||
2746 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2747 | { | |
2748 | switch (cmd) { | |
2749 | case READ_6: | |
2750 | case READ_10: | |
2751 | case READ_16: | |
2752 | ||
2753 | case WRITE_6: | |
2754 | case WRITE_10: | |
2755 | case WRITE_16: | |
2756 | return ata_scsi_rw_xlat; | |
2757 | ||
2758 | case SYNCHRONIZE_CACHE: | |
2759 | if (ata_try_flush_cache(dev)) | |
2760 | return ata_scsi_flush_xlat; | |
2761 | break; | |
2762 | ||
2763 | case VERIFY: | |
2764 | case VERIFY_16: | |
2765 | return ata_scsi_verify_xlat; | |
b095518e JG |
2766 | |
2767 | case ATA_12: | |
2768 | case ATA_16: | |
2769 | return ata_scsi_pass_thru; | |
da61396d | 2770 | |
972dcafb DG |
2771 | case START_STOP: |
2772 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2773 | } |
2774 | ||
2775 | return NULL; | |
2776 | } | |
2777 | ||
2778 | /** | |
2779 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2780 | * @ap: ATA port to which the command was being sent | |
2781 | * @cmd: SCSI command to dump | |
2782 | * | |
2783 | * Prints the contents of a SCSI command via printk(). | |
2784 | */ | |
2785 | ||
2786 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2787 | struct scsi_cmnd *cmd) | |
2788 | { | |
2789 | #ifdef ATA_DEBUG | |
2790 | struct scsi_device *scsidev = cmd->device; | |
2791 | u8 *scsicmd = cmd->cmnd; | |
2792 | ||
2793 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
44877b4e | 2794 | ap->print_id, |
1da177e4 LT |
2795 | scsidev->channel, scsidev->id, scsidev->lun, |
2796 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2797 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2798 | scsicmd[8]); | |
2799 | #endif | |
2800 | } | |
2801 | ||
542b1444 | 2802 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2803 | void (*done)(struct scsi_cmnd *), |
2804 | struct ata_device *dev) | |
eb3f0f9c | 2805 | { |
baf4fdfa ML |
2806 | u8 scsi_op = scmd->cmnd[0]; |
2807 | ata_xlat_func_t xlat_func; | |
2115ea94 TH |
2808 | int rc = 0; |
2809 | ||
eb3f0f9c | 2810 | if (dev->class == ATA_DEV_ATA) { |
baf4fdfa ML |
2811 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) |
2812 | goto bad_cdb_len; | |
eb3f0f9c | 2813 | |
baf4fdfa ML |
2814 | xlat_func = ata_get_xlat_func(dev, scsi_op); |
2815 | } else { | |
2816 | if (unlikely(!scmd->cmd_len)) | |
2817 | goto bad_cdb_len; | |
2818 | ||
2819 | xlat_func = NULL; | |
2820 | if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { | |
2821 | /* relay SCSI command to ATAPI device */ | |
2822 | if (unlikely(scmd->cmd_len > dev->cdb_len)) | |
2823 | goto bad_cdb_len; | |
2824 | ||
2825 | xlat_func = atapi_xlat; | |
2826 | } else { | |
2827 | /* ATA_16 passthru, treat as an ATA command */ | |
2828 | if (unlikely(scmd->cmd_len > 16)) | |
2829 | goto bad_cdb_len; | |
2830 | ||
2831 | xlat_func = ata_get_xlat_func(dev, scsi_op); | |
2832 | } | |
2833 | } | |
2834 | ||
2835 | if (xlat_func) | |
2836 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
2837 | else | |
2838 | ata_scsi_simulate(dev, scmd, done); | |
2115ea94 TH |
2839 | |
2840 | return rc; | |
baf4fdfa ML |
2841 | |
2842 | bad_cdb_len: | |
2843 | DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", | |
2844 | scmd->cmd_len, scsi_op, dev->cdb_len); | |
2845 | scmd->result = DID_ERROR << 16; | |
2846 | done(scmd); | |
2847 | return 0; | |
eb3f0f9c BK |
2848 | } |
2849 | ||
1da177e4 LT |
2850 | /** |
2851 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2852 | * @cmd: SCSI command to be sent | |
2853 | * @done: Completion function, called when command is complete | |
2854 | * | |
2855 | * In some cases, this function translates SCSI commands into | |
2856 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2857 | * hardware. In other cases, this function simulates a | |
2858 | * SCSI device by evaluating and responding to certain | |
2859 | * SCSI commands. This creates the overall effect of | |
2860 | * ATA and ATAPI devices appearing as SCSI devices. | |
2861 | * | |
2862 | * LOCKING: | |
cca3974e | 2863 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
2864 | * |
2865 | * RETURNS: | |
2115ea94 TH |
2866 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
2867 | * 0 otherwise. | |
1da177e4 | 2868 | */ |
1da177e4 LT |
2869 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
2870 | { | |
2871 | struct ata_port *ap; | |
2872 | struct ata_device *dev; | |
2873 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 2874 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 2875 | int rc = 0; |
1da177e4 | 2876 | |
35bb94b1 | 2877 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
2878 | |
2879 | spin_unlock(shost->host_lock); | |
ba6a1308 | 2880 | spin_lock(ap->lock); |
1da177e4 LT |
2881 | |
2882 | ata_scsi_dump_cdb(ap, cmd); | |
2883 | ||
2884 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 2885 | if (likely(dev)) |
2115ea94 | 2886 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 2887 | else { |
1da177e4 LT |
2888 | cmd->result = (DID_BAD_TARGET << 16); |
2889 | done(cmd); | |
1da177e4 LT |
2890 | } |
2891 | ||
ba6a1308 | 2892 | spin_unlock(ap->lock); |
005a5a06 | 2893 | spin_lock(shost->host_lock); |
2115ea94 | 2894 | return rc; |
1da177e4 LT |
2895 | } |
2896 | ||
2897 | /** | |
2898 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 2899 | * @dev: the target device |
1da177e4 LT |
2900 | * @cmd: SCSI command being sent to device. |
2901 | * @done: SCSI command completion function. | |
2902 | * | |
2903 | * Interprets and directly executes a select list of SCSI commands | |
2904 | * that can be handled internally. | |
2905 | * | |
2906 | * LOCKING: | |
cca3974e | 2907 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2908 | */ |
2909 | ||
3373efd8 | 2910 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
2911 | void (*done)(struct scsi_cmnd *)) |
2912 | { | |
2913 | struct ata_scsi_args args; | |
057ace5e | 2914 | const u8 *scsicmd = cmd->cmnd; |
1da177e4 | 2915 | |
9a3dccc4 TH |
2916 | args.dev = dev; |
2917 | args.id = dev->id; | |
1da177e4 LT |
2918 | args.cmd = cmd; |
2919 | args.done = done; | |
2920 | ||
2921 | switch(scsicmd[0]) { | |
2922 | /* no-op's, complete with success */ | |
2923 | case SYNCHRONIZE_CACHE: | |
2924 | case REZERO_UNIT: | |
2925 | case SEEK_6: | |
2926 | case SEEK_10: | |
2927 | case TEST_UNIT_READY: | |
2928 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2929 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2930 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2931 | break; | |
2932 | ||
2933 | case INQUIRY: | |
2934 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 2935 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2936 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2937 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
ad355b46 JG |
2938 | else switch (scsicmd[2]) { |
2939 | case 0x00: | |
1da177e4 | 2940 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); |
ad355b46 JG |
2941 | break; |
2942 | case 0x80: | |
1da177e4 | 2943 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); |
ad355b46 JG |
2944 | break; |
2945 | case 0x83: | |
1da177e4 | 2946 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); |
ad355b46 JG |
2947 | break; |
2948 | case 0x89: | |
2949 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); | |
2950 | break; | |
2951 | default: | |
ae006510 | 2952 | ata_scsi_invalid_field(cmd, done); |
ad355b46 JG |
2953 | break; |
2954 | } | |
1da177e4 LT |
2955 | break; |
2956 | ||
2957 | case MODE_SENSE: | |
2958 | case MODE_SENSE_10: | |
2959 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2960 | break; | |
2961 | ||
2962 | case MODE_SELECT: /* unconditionally return */ | |
2963 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 2964 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2965 | break; |
2966 | ||
2967 | case READ_CAPACITY: | |
2968 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2969 | break; | |
2970 | ||
2971 | case SERVICE_ACTION_IN: | |
2972 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2973 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2974 | else | |
ae006510 | 2975 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2976 | break; |
2977 | ||
2978 | case REPORT_LUNS: | |
2979 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2980 | break; | |
2981 | ||
b095518e | 2982 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2983 | case REQUEST_SENSE: |
2984 | ||
2985 | /* all other commands */ | |
2986 | default: | |
ae006510 DG |
2987 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
2988 | /* "Invalid command operation code" */ | |
2989 | done(cmd); | |
1da177e4 LT |
2990 | break; |
2991 | } | |
2992 | } | |
2993 | ||
f3187195 TH |
2994 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) |
2995 | { | |
2996 | int i, rc; | |
2997 | ||
2998 | for (i = 0; i < host->n_ports; i++) { | |
2999 | struct ata_port *ap = host->ports[i]; | |
3000 | struct Scsi_Host *shost; | |
3001 | ||
3002 | rc = -ENOMEM; | |
3003 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
3004 | if (!shost) | |
3005 | goto err_alloc; | |
3006 | ||
3007 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
3008 | ap->scsi_host = shost; | |
3009 | ||
3010 | shost->transportt = &ata_scsi_transport_template; | |
3011 | shost->unique_id = ap->print_id; | |
3012 | shost->max_id = 16; | |
3013 | shost->max_lun = 1; | |
3014 | shost->max_channel = 1; | |
3015 | shost->max_cmd_len = 16; | |
3016 | ||
3017 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); | |
3018 | if (rc) | |
3019 | goto err_add; | |
3020 | } | |
3021 | ||
3022 | return 0; | |
3023 | ||
3024 | err_add: | |
3025 | scsi_host_put(host->ports[i]->scsi_host); | |
3026 | err_alloc: | |
3027 | while (--i >= 0) { | |
3028 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
3029 | ||
3030 | scsi_remove_host(shost); | |
3031 | scsi_host_put(shost); | |
3032 | } | |
3033 | return rc; | |
3034 | } | |
3035 | ||
1ae46317 | 3036 | void ata_scsi_scan_host(struct ata_port *ap, int sync) |
644dd0cc | 3037 | { |
1ae46317 TH |
3038 | int tries = 5; |
3039 | struct ata_device *last_failed_dev = NULL; | |
41bda9c9 | 3040 | struct ata_link *link; |
1ae46317 | 3041 | struct ata_device *dev; |
644dd0cc | 3042 | |
198e0fed | 3043 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
3044 | return; |
3045 | ||
1ae46317 | 3046 | repeat: |
41bda9c9 TH |
3047 | ata_port_for_each_link(link, ap) { |
3048 | ata_link_for_each_dev(dev, link) { | |
3049 | struct scsi_device *sdev; | |
3050 | int channel = 0, id = 0; | |
3edebac4 | 3051 | |
41bda9c9 TH |
3052 | if (!ata_dev_enabled(dev) || dev->sdev) |
3053 | continue; | |
3f19ee8c | 3054 | |
41bda9c9 TH |
3055 | if (ata_is_host_link(link)) |
3056 | id = dev->devno; | |
3057 | else | |
3058 | channel = link->pmp; | |
3059 | ||
3060 | sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, | |
3061 | NULL); | |
3062 | if (!IS_ERR(sdev)) { | |
3063 | dev->sdev = sdev; | |
3064 | scsi_device_put(sdev); | |
3065 | } | |
3edebac4 | 3066 | } |
3f19ee8c | 3067 | } |
1ae46317 TH |
3068 | |
3069 | /* If we scanned while EH was in progress or allocation | |
3070 | * failure occurred, scan would have failed silently. Check | |
3071 | * whether all devices are attached. | |
3072 | */ | |
41bda9c9 TH |
3073 | ata_port_for_each_link(link, ap) { |
3074 | ata_link_for_each_dev(dev, link) { | |
3075 | if (ata_dev_enabled(dev) && !dev->sdev) | |
3076 | goto exit_loop; | |
3077 | } | |
1ae46317 | 3078 | } |
41bda9c9 TH |
3079 | exit_loop: |
3080 | if (!link) | |
1ae46317 TH |
3081 | return; |
3082 | ||
3083 | /* we're missing some SCSI devices */ | |
3084 | if (sync) { | |
3085 | /* If caller requested synchrnous scan && we've made | |
3086 | * any progress, sleep briefly and repeat. | |
3087 | */ | |
3088 | if (dev != last_failed_dev) { | |
3089 | msleep(100); | |
3090 | last_failed_dev = dev; | |
3091 | goto repeat; | |
3092 | } | |
3093 | ||
3094 | /* We might be failing to detect boot device, give it | |
3095 | * a few more chances. | |
3096 | */ | |
3097 | if (--tries) { | |
3098 | msleep(100); | |
3099 | goto repeat; | |
3100 | } | |
3101 | ||
3102 | ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " | |
3103 | "failed without making any progress,\n" | |
3104 | " switching to async\n"); | |
3105 | } | |
3106 | ||
3107 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3108 | round_jiffies_relative(HZ)); | |
644dd0cc | 3109 | } |
0ea035a3 TH |
3110 | |
3111 | /** | |
3112 | * ata_scsi_offline_dev - offline attached SCSI device | |
3113 | * @dev: ATA device to offline attached SCSI device for | |
3114 | * | |
3115 | * This function is called from ata_eh_hotplug() and responsible | |
3116 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 3117 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
3118 | * against clearing. |
3119 | * | |
3120 | * LOCKING: | |
cca3974e | 3121 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
3122 | * |
3123 | * RETURNS: | |
3124 | * 1 if attached SCSI device exists, 0 otherwise. | |
3125 | */ | |
3126 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3127 | { | |
3128 | if (dev->sdev) { | |
3129 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3130 | return 1; | |
3131 | } | |
3132 | return 0; | |
3133 | } | |
580b2102 TH |
3134 | |
3135 | /** | |
3136 | * ata_scsi_remove_dev - remove attached SCSI device | |
3137 | * @dev: ATA device to remove attached SCSI device for | |
3138 | * | |
3139 | * This function is called from ata_eh_scsi_hotplug() and | |
3140 | * responsible for removing the SCSI device attached to @dev. | |
3141 | * | |
3142 | * LOCKING: | |
3143 | * Kernel thread context (may sleep). | |
3144 | */ | |
3145 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3146 | { | |
9af5c9c9 | 3147 | struct ata_port *ap = dev->link->ap; |
580b2102 TH |
3148 | struct scsi_device *sdev; |
3149 | unsigned long flags; | |
3150 | ||
3151 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3152 | * state doesn't change underneath us and thus | |
3153 | * scsi_device_get() always succeeds. The mutex locking can | |
3154 | * be removed if there is __scsi_device_get() interface which | |
3155 | * increments reference counts regardless of device state. | |
3156 | */ | |
cca3974e | 3157 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 3158 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3159 | |
cca3974e | 3160 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
3161 | sdev = dev->sdev; |
3162 | dev->sdev = NULL; | |
3163 | ||
3164 | if (sdev) { | |
3165 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 3166 | * away underneath us after the host lock and |
580b2102 TH |
3167 | * scan_mutex are released. Hold onto it. |
3168 | */ | |
3169 | if (scsi_device_get(sdev) == 0) { | |
3170 | /* The following ensures the attached sdev is | |
3171 | * offline on return from ata_scsi_offline_dev() | |
3172 | * regardless it wins or loses the race | |
3173 | * against this function. | |
3174 | */ | |
3175 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3176 | } else { | |
3177 | WARN_ON(1); | |
3178 | sdev = NULL; | |
3179 | } | |
3180 | } | |
3181 | ||
ba6a1308 | 3182 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3183 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3184 | |
3185 | if (sdev) { | |
3186 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3187 | sdev->sdev_gendev.bus_id); | |
3188 | ||
3189 | scsi_remove_device(sdev); | |
3190 | scsi_device_put(sdev); | |
3191 | } | |
3192 | } | |
3193 | ||
41bda9c9 TH |
3194 | static void ata_scsi_handle_link_detach(struct ata_link *link) |
3195 | { | |
3196 | struct ata_port *ap = link->ap; | |
3197 | struct ata_device *dev; | |
3198 | ||
3199 | ata_link_for_each_dev(dev, link) { | |
3200 | unsigned long flags; | |
3201 | ||
3202 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3203 | continue; | |
3204 | ||
3205 | spin_lock_irqsave(ap->lock, flags); | |
3206 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3207 | spin_unlock_irqrestore(ap->lock, flags); | |
3208 | ||
3209 | ata_scsi_remove_dev(dev); | |
3210 | } | |
3211 | } | |
3212 | ||
2f294968 KCA |
3213 | /** |
3214 | * ata_scsi_media_change_notify - send media change event | |
3215 | * @atadev: Pointer to the disk device with media change event | |
3216 | * | |
3217 | * Tell the block layer to send a media change notification | |
3218 | * event. | |
3219 | * | |
3220 | * LOCKING: | |
3221 | * interrupt context, may not sleep. | |
3222 | */ | |
3223 | void ata_scsi_media_change_notify(struct ata_device *atadev) | |
3224 | { | |
3225 | #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED | |
3226 | scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE); | |
3227 | #endif | |
3228 | } | |
3229 | EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify); | |
3230 | ||
580b2102 TH |
3231 | /** |
3232 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3233 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3234 | * |
3235 | * Perform SCSI part of hotplug. It's executed from a separate | |
3236 | * workqueue after EH completes. This is necessary because SCSI | |
3237 | * hot plugging requires working EH and hot unplugging is | |
3238 | * synchronized with hot plugging with a mutex. | |
3239 | * | |
3240 | * LOCKING: | |
3241 | * Kernel thread context (may sleep). | |
3242 | */ | |
65f27f38 | 3243 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3244 | { |
65f27f38 DH |
3245 | struct ata_port *ap = |
3246 | container_of(work, struct ata_port, hotplug_task.work); | |
41bda9c9 | 3247 | int i; |
580b2102 | 3248 | |
b51e9e5d | 3249 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3250 | DPRINTK("ENTER/EXIT - unloading\n"); |
3251 | return; | |
3252 | } | |
3253 | ||
3254 | DPRINTK("ENTER\n"); | |
3255 | ||
41bda9c9 TH |
3256 | /* Unplug detached devices. We cannot use link iterator here |
3257 | * because PMP links have to be scanned even if PMP is | |
3258 | * currently not attached. Iterate manually. | |
3259 | */ | |
3260 | ata_scsi_handle_link_detach(&ap->link); | |
3261 | if (ap->pmp_link) | |
3262 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
3263 | ata_scsi_handle_link_detach(&ap->pmp_link[i]); | |
580b2102 TH |
3264 | |
3265 | /* scan for new ones */ | |
1ae46317 | 3266 | ata_scsi_scan_host(ap, 0); |
580b2102 TH |
3267 | |
3268 | DPRINTK("EXIT\n"); | |
3269 | } | |
83c47bcb TH |
3270 | |
3271 | /** | |
3272 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3273 | * @shost: SCSI host to scan | |
3274 | * @channel: Channel to scan | |
3275 | * @id: ID to scan | |
3276 | * @lun: LUN to scan | |
3277 | * | |
3278 | * This function is called when user explicitly requests bus | |
3279 | * scan. Set probe pending flag and invoke EH. | |
3280 | * | |
3281 | * LOCKING: | |
3282 | * SCSI layer (we don't care) | |
3283 | * | |
3284 | * RETURNS: | |
3285 | * Zero. | |
3286 | */ | |
3287 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3288 | unsigned int id, unsigned int lun) | |
3289 | { | |
3290 | struct ata_port *ap = ata_shost_to_port(shost); | |
3291 | unsigned long flags; | |
41bda9c9 | 3292 | int devno, rc = 0; |
83c47bcb TH |
3293 | |
3294 | if (!ap->ops->error_handler) | |
3295 | return -EOPNOTSUPP; | |
3296 | ||
41bda9c9 | 3297 | if (lun != SCAN_WILD_CARD && lun) |
83c47bcb TH |
3298 | return -EINVAL; |
3299 | ||
41bda9c9 TH |
3300 | if (ap->nr_pmp_links == 0) { |
3301 | if (channel != SCAN_WILD_CARD && channel) | |
3302 | return -EINVAL; | |
3303 | devno = id; | |
3304 | } else { | |
3305 | if (id != SCAN_WILD_CARD && id) | |
3306 | return -EINVAL; | |
3307 | devno = channel; | |
3308 | } | |
3309 | ||
ba6a1308 | 3310 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb | 3311 | |
41bda9c9 TH |
3312 | if (devno == SCAN_WILD_CARD) { |
3313 | struct ata_link *link; | |
3314 | ||
3315 | ata_port_for_each_link(link, ap) { | |
3316 | struct ata_eh_info *ehi = &link->eh_info; | |
3317 | ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1; | |
3318 | ehi->action |= ATA_EH_SOFTRESET; | |
3319 | } | |
83c47bcb | 3320 | } else { |
41bda9c9 | 3321 | struct ata_device *dev = ata_find_dev(ap, devno); |
83c47bcb TH |
3322 | |
3323 | if (dev) { | |
41bda9c9 | 3324 | struct ata_eh_info *ehi = &dev->link->eh_info; |
9af5c9c9 TH |
3325 | ehi->probe_mask |= 1 << dev->devno; |
3326 | ehi->action |= ATA_EH_SOFTRESET; | |
3327 | ehi->flags |= ATA_EHI_RESUME_LINK; | |
83c47bcb TH |
3328 | } else |
3329 | rc = -EINVAL; | |
3330 | } | |
3331 | ||
309afcb5 | 3332 | if (rc == 0) { |
83c47bcb | 3333 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3334 | spin_unlock_irqrestore(ap->lock, flags); |
3335 | ata_port_wait_eh(ap); | |
3336 | } else | |
3337 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3338 | |
3339 | return rc; | |
3340 | } | |
3057ac3c | 3341 | |
3342 | /** | |
d0171269 | 3343 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3344 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3345 | * |
d0171269 TH |
3346 | * After ATA pass thru (SAT) commands are executed successfully, |
3347 | * libata need to propagate the changes to SCSI layer. This | |
3348 | * function must be executed from ata_aux_wq such that sdev | |
3349 | * attach/detach don't race with rescan. | |
3057ac3c | 3350 | * |
d0171269 TH |
3351 | * LOCKING: |
3352 | * Kernel thread context (may sleep). | |
3057ac3c | 3353 | */ |
65f27f38 | 3354 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3355 | { |
65f27f38 DH |
3356 | struct ata_port *ap = |
3357 | container_of(work, struct ata_port, scsi_rescan_task); | |
41bda9c9 | 3358 | struct ata_link *link; |
f58229f8 | 3359 | struct ata_device *dev; |
f84e7e41 | 3360 | unsigned long flags; |
3057ac3c | 3361 | |
f84e7e41 TH |
3362 | spin_lock_irqsave(ap->lock, flags); |
3363 | ||
41bda9c9 TH |
3364 | ata_port_for_each_link(link, ap) { |
3365 | ata_link_for_each_dev(dev, link) { | |
3366 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3367 | |
41bda9c9 TH |
3368 | if (!ata_dev_enabled(dev) || !sdev) |
3369 | continue; | |
3370 | if (scsi_device_get(sdev)) | |
3371 | continue; | |
f84e7e41 | 3372 | |
41bda9c9 TH |
3373 | spin_unlock_irqrestore(ap->lock, flags); |
3374 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3375 | scsi_device_put(sdev); | |
3376 | spin_lock_irqsave(ap->lock, flags); | |
3377 | } | |
3057ac3c | 3378 | } |
f84e7e41 TH |
3379 | |
3380 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3381 | } |
80289167 BK |
3382 | |
3383 | /** | |
3384 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3385 | * @host: ATA host container for all SAS ports |
80289167 | 3386 | * @port_info: Information from low-level host driver |
cca3974e | 3387 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3388 | * |
3389 | * LOCKING: | |
3390 | * PCI/etc. bus probe sem. | |
3391 | * | |
3392 | * RETURNS: | |
3393 | * ata_port pointer on success / NULL on failure. | |
3394 | */ | |
3395 | ||
cca3974e | 3396 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3397 | struct ata_port_info *port_info, |
cca3974e | 3398 | struct Scsi_Host *shost) |
80289167 | 3399 | { |
f3187195 | 3400 | struct ata_port *ap; |
80289167 | 3401 | |
f3187195 | 3402 | ap = ata_port_alloc(host); |
80289167 BK |
3403 | if (!ap) |
3404 | return NULL; | |
3405 | ||
f3187195 | 3406 | ap->port_no = 0; |
cca3974e | 3407 | ap->lock = shost->host_lock; |
f3187195 TH |
3408 | ap->pio_mask = port_info->pio_mask; |
3409 | ap->mwdma_mask = port_info->mwdma_mask; | |
3410 | ap->udma_mask = port_info->udma_mask; | |
3411 | ap->flags |= port_info->flags; | |
3412 | ap->ops = port_info->port_ops; | |
3413 | ap->cbl = ATA_CBL_SATA; | |
3414 | ||
80289167 BK |
3415 | return ap; |
3416 | } | |
3417 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3418 | ||
3419 | /** | |
3420 | * ata_sas_port_start - Set port up for dma. | |
3421 | * @ap: Port to initialize | |
3422 | * | |
3423 | * Called just after data structures for each port are | |
3424 | * initialized. Allocates DMA pad. | |
3425 | * | |
3426 | * May be used as the port_start() entry in ata_port_operations. | |
3427 | * | |
3428 | * LOCKING: | |
3429 | * Inherited from caller. | |
3430 | */ | |
3431 | int ata_sas_port_start(struct ata_port *ap) | |
3432 | { | |
3433 | return ata_pad_alloc(ap, ap->dev); | |
3434 | } | |
3435 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3436 | ||
3437 | /** | |
3438 | * ata_port_stop - Undo ata_sas_port_start() | |
3439 | * @ap: Port to shut down | |
3440 | * | |
3441 | * Frees the DMA pad. | |
3442 | * | |
3443 | * May be used as the port_stop() entry in ata_port_operations. | |
3444 | * | |
3445 | * LOCKING: | |
3446 | * Inherited from caller. | |
3447 | */ | |
3448 | ||
3449 | void ata_sas_port_stop(struct ata_port *ap) | |
3450 | { | |
3451 | ata_pad_free(ap, ap->dev); | |
3452 | } | |
3453 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3454 | ||
3455 | /** | |
3456 | * ata_sas_port_init - Initialize a SATA device | |
3457 | * @ap: SATA port to initialize | |
3458 | * | |
3459 | * LOCKING: | |
3460 | * PCI/etc. bus probe sem. | |
3461 | * | |
3462 | * RETURNS: | |
3463 | * Zero on success, non-zero on error. | |
3464 | */ | |
3465 | ||
3466 | int ata_sas_port_init(struct ata_port *ap) | |
3467 | { | |
3468 | int rc = ap->ops->port_start(ap); | |
3469 | ||
f3187195 TH |
3470 | if (!rc) { |
3471 | ap->print_id = ata_print_id++; | |
80289167 | 3472 | rc = ata_bus_probe(ap); |
f3187195 | 3473 | } |
80289167 BK |
3474 | |
3475 | return rc; | |
3476 | } | |
3477 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3478 | ||
3479 | /** | |
3480 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3481 | * @ap: SATA port to destroy | |
3482 | * | |
3483 | */ | |
3484 | ||
3485 | void ata_sas_port_destroy(struct ata_port *ap) | |
3486 | { | |
f0d36efd TH |
3487 | if (ap->ops->port_stop) |
3488 | ap->ops->port_stop(ap); | |
80289167 BK |
3489 | kfree(ap); |
3490 | } | |
3491 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3492 | ||
3493 | /** | |
3494 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3495 | * @sdev: SCSI device to configure | |
3496 | * @ap: ATA port to which SCSI device is attached | |
3497 | * | |
3498 | * RETURNS: | |
3499 | * Zero. | |
3500 | */ | |
3501 | ||
3502 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3503 | { | |
3504 | ata_scsi_sdev_config(sdev); | |
9af5c9c9 | 3505 | ata_scsi_dev_config(sdev, ap->link.device); |
80289167 BK |
3506 | return 0; |
3507 | } | |
3508 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3509 | ||
3510 | /** | |
3511 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3512 | * @cmd: SCSI command to be sent | |
3513 | * @done: Completion function, called when command is complete | |
3514 | * @ap: ATA port to which the command is being sent | |
3515 | * | |
3516 | * RETURNS: | |
08475a19 BK |
3517 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3518 | * 0 otherwise. | |
80289167 BK |
3519 | */ |
3520 | ||
3521 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3522 | struct ata_port *ap) | |
3523 | { | |
08475a19 BK |
3524 | int rc = 0; |
3525 | ||
80289167 BK |
3526 | ata_scsi_dump_cdb(ap, cmd); |
3527 | ||
9af5c9c9 TH |
3528 | if (likely(ata_scsi_dev_enabled(ap->link.device))) |
3529 | rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); | |
80289167 BK |
3530 | else { |
3531 | cmd->result = (DID_BAD_TARGET << 16); | |
3532 | done(cmd); | |
3533 | } | |
08475a19 | 3534 | return rc; |
80289167 BK |
3535 | } |
3536 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |