]>
Commit | Line | Data |
---|---|---|
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 | ||
057ace5e | 54 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); |
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 | */ | |
107 | 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 | ||
b095518e JG |
151 | /** |
152 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 153 | * @scsidev: Device to which we are issuing command |
b095518e JG |
154 | * @arg: User provided data for issuing command |
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 | ||
163 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) | |
164 | { | |
165 | int rc = 0; | |
166 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
167 | u8 args[4], *argbuf = NULL; | |
168 | int argsize = 0; | |
85837ebd MC |
169 | struct scsi_sense_hdr sshdr; |
170 | enum dma_data_direction data_dir; | |
b095518e | 171 | |
c893a3ae | 172 | if (arg == NULL) |
b095518e JG |
173 | return -EINVAL; |
174 | ||
175 | if (copy_from_user(args, arg, sizeof(args))) | |
176 | return -EFAULT; | |
177 | ||
b095518e JG |
178 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
179 | ||
180 | if (args[3]) { | |
181 | argsize = SECTOR_SIZE * args[3]; | |
182 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
183 | if (argbuf == NULL) { |
184 | rc = -ENOMEM; | |
185 | goto error; | |
186 | } | |
b095518e JG |
187 | |
188 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
189 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
190 | block count in sector count field */ | |
85837ebd | 191 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
192 | } else { |
193 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
194 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
85837ebd | 195 | data_dir = DMA_NONE; |
b095518e JG |
196 | } |
197 | ||
198 | scsi_cmd[0] = ATA_16; | |
199 | ||
200 | scsi_cmd[4] = args[2]; | |
201 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
202 | scsi_cmd[6] = args[3]; | |
203 | scsi_cmd[8] = args[1]; | |
204 | scsi_cmd[10] = 0x4f; | |
205 | scsi_cmd[12] = 0xc2; | |
206 | } else { | |
207 | scsi_cmd[6] = args[1]; | |
208 | } | |
209 | scsi_cmd[14] = args[0]; | |
210 | ||
211 | /* Good values for timeout and retries? Values below | |
212 | from scsi_ioctl_send_command() for default case... */ | |
85837ebd MC |
213 | if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
214 | &sshdr, (10*HZ), 5)) { | |
b095518e JG |
215 | rc = -EIO; |
216 | goto error; | |
217 | } | |
218 | ||
219 | /* Need code to retrieve data from check condition? */ | |
220 | ||
221 | if ((argbuf) | |
c893a3ae | 222 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
223 | rc = -EFAULT; |
224 | error: | |
b095518e JG |
225 | if (argbuf) |
226 | kfree(argbuf); | |
227 | ||
228 | return rc; | |
229 | } | |
230 | ||
231 | /** | |
232 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 233 | * @scsidev: Device to which we are issuing command |
b095518e JG |
234 | * @arg: User provided data for issuing command |
235 | * | |
236 | * LOCKING: | |
237 | * Defined by the SCSI layer. We don't really care. | |
238 | * | |
239 | * RETURNS: | |
240 | * Zero on success, negative errno on error. | |
241 | */ | |
242 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
243 | { | |
244 | int rc = 0; | |
245 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
246 | u8 args[7]; | |
85837ebd | 247 | struct scsi_sense_hdr sshdr; |
b095518e | 248 | |
c893a3ae | 249 | if (arg == NULL) |
b095518e JG |
250 | return -EINVAL; |
251 | ||
252 | if (copy_from_user(args, arg, sizeof(args))) | |
253 | return -EFAULT; | |
254 | ||
255 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
256 | scsi_cmd[0] = ATA_16; | |
257 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
258 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
259 | scsi_cmd[4] = args[1]; | |
260 | scsi_cmd[6] = args[2]; | |
261 | scsi_cmd[8] = args[3]; | |
262 | scsi_cmd[10] = args[4]; | |
263 | scsi_cmd[12] = args[5]; | |
264 | scsi_cmd[14] = args[0]; | |
265 | ||
b095518e | 266 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 267 | from scsi_ioctl_send_command() for default case... */ |
85837ebd MC |
268 | if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr, |
269 | (10*HZ), 5)) | |
b095518e | 270 | rc = -EIO; |
b095518e JG |
271 | |
272 | /* Need code to retrieve data from check condition? */ | |
b095518e JG |
273 | return rc; |
274 | } | |
275 | ||
1da177e4 LT |
276 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
277 | { | |
1da177e4 LT |
278 | int val = -EINVAL, rc = -EINVAL; |
279 | ||
1da177e4 LT |
280 | switch (cmd) { |
281 | case ATA_IOC_GET_IO32: | |
282 | val = 0; | |
283 | if (copy_to_user(arg, &val, 1)) | |
284 | return -EFAULT; | |
285 | return 0; | |
286 | ||
287 | case ATA_IOC_SET_IO32: | |
288 | val = (unsigned long) arg; | |
289 | if (val != 0) | |
290 | return -EINVAL; | |
291 | return 0; | |
292 | ||
b095518e JG |
293 | case HDIO_DRIVE_CMD: |
294 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
295 | return -EACCES; | |
296 | return ata_cmd_ioctl(scsidev, arg); | |
297 | ||
298 | case HDIO_DRIVE_TASK: | |
299 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
300 | return -EACCES; | |
301 | return ata_task_ioctl(scsidev, arg); | |
302 | ||
1da177e4 LT |
303 | default: |
304 | rc = -ENOTTY; | |
305 | break; | |
306 | } | |
307 | ||
1da177e4 LT |
308 | return rc; |
309 | } | |
310 | ||
311 | /** | |
312 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
313 | * @dev: ATA device to which the new command is attached |
314 | * @cmd: SCSI command that originated this ATA command | |
315 | * @done: SCSI command completion function | |
316 | * | |
317 | * Obtain a reference to an unused ata_queued_cmd structure, | |
318 | * which is the basic libata structure representing a single | |
319 | * ATA command sent to the hardware. | |
320 | * | |
321 | * If a command was available, fill in the SCSI-specific | |
322 | * portions of the structure with information on the | |
323 | * current command. | |
324 | * | |
325 | * LOCKING: | |
326 | * spin_lock_irqsave(host_set lock) | |
327 | * | |
328 | * RETURNS: | |
329 | * Command allocated, or %NULL if none available. | |
330 | */ | |
3373efd8 | 331 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
1da177e4 LT |
332 | struct scsi_cmnd *cmd, |
333 | void (*done)(struct scsi_cmnd *)) | |
334 | { | |
335 | struct ata_queued_cmd *qc; | |
336 | ||
3373efd8 | 337 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
338 | if (qc) { |
339 | qc->scsicmd = cmd; | |
340 | qc->scsidone = done; | |
341 | ||
342 | if (cmd->use_sg) { | |
cedc9a47 | 343 | qc->__sg = (struct scatterlist *) cmd->request_buffer; |
1da177e4 LT |
344 | qc->n_elem = cmd->use_sg; |
345 | } else { | |
cedc9a47 | 346 | qc->__sg = &qc->sgent; |
1da177e4 LT |
347 | qc->n_elem = 1; |
348 | } | |
349 | } else { | |
350 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
351 | done(cmd); | |
352 | } | |
353 | ||
354 | return qc; | |
355 | } | |
356 | ||
b095518e JG |
357 | /** |
358 | * ata_dump_status - user friendly display of error info | |
359 | * @id: id of the port in question | |
360 | * @tf: ptr to filled out taskfile | |
361 | * | |
362 | * Decode and dump the ATA error/status registers for the user so | |
363 | * that they have some idea what really happened at the non | |
364 | * make-believe layer. | |
365 | * | |
366 | * LOCKING: | |
367 | * inherited from caller | |
368 | */ | |
369 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
370 | { | |
371 | u8 stat = tf->command, err = tf->feature; | |
372 | ||
373 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
374 | if (stat & ATA_BUSY) { | |
375 | printk("Busy }\n"); /* Data is not valid in this case */ | |
376 | } else { | |
377 | if (stat & 0x40) printk("DriveReady "); | |
378 | if (stat & 0x20) printk("DeviceFault "); | |
379 | if (stat & 0x10) printk("SeekComplete "); | |
380 | if (stat & 0x08) printk("DataRequest "); | |
381 | if (stat & 0x04) printk("CorrectedError "); | |
382 | if (stat & 0x02) printk("Index "); | |
383 | if (stat & 0x01) printk("Error "); | |
384 | printk("}\n"); | |
385 | ||
386 | if (err) { | |
387 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
388 | if (err & 0x04) printk("DriveStatusError "); | |
389 | if (err & 0x80) { | |
390 | if (err & 0x04) printk("BadCRC "); | |
391 | else printk("Sector "); | |
392 | } | |
393 | if (err & 0x40) printk("UncorrectableError "); | |
394 | if (err & 0x10) printk("SectorIdNotFound "); | |
395 | if (err & 0x02) printk("TrackZeroNotFound "); | |
396 | if (err & 0x01) printk("AddrMarkNotFound "); | |
397 | printk("}\n"); | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
9b847548 JA |
402 | int ata_scsi_device_resume(struct scsi_device *sdev) |
403 | { | |
35bb94b1 | 404 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
31534363 | 405 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); |
9b847548 | 406 | |
3373efd8 | 407 | return ata_device_resume(dev); |
9b847548 JA |
408 | } |
409 | ||
082776e4 | 410 | int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) |
9b847548 | 411 | { |
35bb94b1 | 412 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
31534363 | 413 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); |
9b847548 | 414 | |
3373efd8 | 415 | return ata_device_suspend(dev, state); |
9b847548 JA |
416 | } |
417 | ||
1da177e4 LT |
418 | /** |
419 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 420 | * @id: ATA device number |
1da177e4 | 421 | * @drv_stat: value contained in ATA status register |
b095518e JG |
422 | * @drv_err: value contained in ATA error register |
423 | * @sk: the sense key we'll fill out | |
424 | * @asc: the additional sense code we'll fill out | |
425 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 426 | * @verbose: be verbose |
1da177e4 | 427 | * |
b095518e JG |
428 | * Converts an ATA error into a SCSI error. Fill out pointers to |
429 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
430 | * format sense blocks. | |
1da177e4 LT |
431 | * |
432 | * LOCKING: | |
433 | * spin_lock_irqsave(host_set lock) | |
434 | */ | |
2e9edbf8 | 435 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
246619da | 436 | u8 *ascq, int verbose) |
1da177e4 | 437 | { |
b095518e | 438 | int i; |
ffe75ef6 | 439 | |
1da177e4 | 440 | /* Based on the 3ware driver translation table */ |
98ac62de | 441 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
442 | /* BBD|ECC|ID|MAR */ |
443 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
444 | /* BBD|ECC|ID */ | |
445 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
446 | /* ECC|MC|MARK */ | |
447 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
448 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
449 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
450 | /* MC|ID|ABRT|TRK0|MARK */ | |
451 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
452 | /* MCR|MARK */ | |
453 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
454 | /* Bad address mark */ | |
455 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
456 | /* TRK0 */ | |
457 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
458 | /* Abort & !ICRC */ | |
459 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
460 | /* Media change request */ | |
461 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
462 | /* SRV */ | |
463 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
464 | /* Media change */ | |
465 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
466 | /* ECC */ | |
467 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
468 | /* BBD - block marked bad */ | |
469 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
470 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
471 | }; | |
98ac62de | 472 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
473 | /* Must be first because BUSY means no other bits valid */ |
474 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
475 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
476 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
477 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
478 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
479 | }; | |
1da177e4 | 480 | |
1da177e4 LT |
481 | /* |
482 | * Is this an error we can process/parse | |
483 | */ | |
b095518e JG |
484 | if (drv_stat & ATA_BUSY) { |
485 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 486 | } |
b095518e JG |
487 | |
488 | if (drv_err) { | |
489 | /* Look for drv_err */ | |
490 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
491 | /* Look for best matches first */ | |
2e9edbf8 | 492 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
493 | sense_table[i][0]) { |
494 | *sk = sense_table[i][1]; | |
495 | *asc = sense_table[i][2]; | |
496 | *ascq = sense_table[i][3]; | |
497 | goto translate_done; | |
498 | } | |
499 | } | |
500 | /* No immediate match */ | |
246619da TH |
501 | if (verbose) |
502 | printk(KERN_WARNING "ata%u: no sense translation for " | |
503 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 504 | } |
b095518e JG |
505 | |
506 | /* Fall back to interpreting status bits */ | |
507 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
508 | if (stat_table[i][0] & drv_stat) { | |
509 | *sk = stat_table[i][1]; | |
510 | *asc = stat_table[i][2]; | |
511 | *ascq = stat_table[i][3]; | |
512 | goto translate_done; | |
1da177e4 | 513 | } |
b095518e JG |
514 | } |
515 | /* No error? Undecoded? */ | |
246619da TH |
516 | if (verbose) |
517 | printk(KERN_WARNING "ata%u: no sense translation for " | |
518 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 519 | |
2d202024 AC |
520 | /* We need a sensible error return here, which is tricky, and one |
521 | that won't cause people to do things like return a disk wrongly */ | |
522 | *sk = ABORTED_COMMAND; | |
523 | *asc = 0x00; | |
524 | *ascq = 0x00; | |
b095518e JG |
525 | |
526 | translate_done: | |
246619da TH |
527 | if (verbose) |
528 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
529 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
530 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
531 | return; |
532 | } | |
533 | ||
534 | /* | |
535 | * ata_gen_ata_desc_sense - Generate check condition sense block. | |
536 | * @qc: Command that completed. | |
537 | * | |
538 | * This function is specific to the ATA descriptor format sense | |
539 | * block specified for the ATA pass through commands. Regardless | |
540 | * of whether the command errored or not, return a sense | |
541 | * block. Copy all controller registers into the sense | |
542 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
543 | * | |
544 | * LOCKING: | |
545 | * spin_lock_irqsave(host_set lock) | |
546 | */ | |
547 | void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) | |
548 | { | |
549 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 550 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
551 | unsigned char *sb = cmd->sense_buffer; |
552 | unsigned char *desc = sb + 8; | |
246619da | 553 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
554 | |
555 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
556 | ||
0e5dec47 | 557 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 558 | |
b095518e JG |
559 | /* |
560 | * Use ata_to_sense_error() to map status register bits | |
561 | * onto sense key, asc & ascq. | |
562 | */ | |
058e55e1 TH |
563 | if (qc->err_mask || |
564 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
b095518e | 565 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
246619da | 566 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 567 | sb[1] &= 0x0f; |
1da177e4 LT |
568 | } |
569 | ||
b095518e JG |
570 | /* |
571 | * Sense data is current and format is descriptor. | |
572 | */ | |
573 | sb[0] = 0x72; | |
1da177e4 | 574 | |
b095518e JG |
575 | desc[0] = 0x09; |
576 | ||
577 | /* | |
578 | * Set length of additional sense data. | |
579 | * Since we only populate descriptor 0, the total | |
580 | * length is the same (fixed) length as descriptor 0. | |
581 | */ | |
582 | desc[1] = sb[7] = 14; | |
583 | ||
584 | /* | |
585 | * Copy registers into sense buffer. | |
586 | */ | |
587 | desc[2] = 0x00; | |
588 | desc[3] = tf->feature; /* == error reg */ | |
589 | desc[5] = tf->nsect; | |
590 | desc[7] = tf->lbal; | |
591 | desc[9] = tf->lbam; | |
592 | desc[11] = tf->lbah; | |
593 | desc[12] = tf->device; | |
594 | desc[13] = tf->command; /* == status reg */ | |
595 | ||
596 | /* | |
597 | * Fill in Extend bit, and the high order bytes | |
598 | * if applicable. | |
599 | */ | |
600 | if (tf->flags & ATA_TFLAG_LBA48) { | |
601 | desc[2] |= 0x01; | |
602 | desc[4] = tf->hob_nsect; | |
603 | desc[6] = tf->hob_lbal; | |
604 | desc[8] = tf->hob_lbam; | |
605 | desc[10] = tf->hob_lbah; | |
1da177e4 | 606 | } |
b095518e | 607 | } |
1da177e4 | 608 | |
b095518e JG |
609 | /** |
610 | * ata_gen_fixed_sense - generate a SCSI fixed sense block | |
611 | * @qc: Command that we are erroring out | |
612 | * | |
613 | * Leverage ata_to_sense_error() to give us the codes. Fit our | |
614 | * LBA in here if there's room. | |
615 | * | |
616 | * LOCKING: | |
617 | * inherited from caller | |
618 | */ | |
619 | void ata_gen_fixed_sense(struct ata_queued_cmd *qc) | |
620 | { | |
621 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 622 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 623 | unsigned char *sb = cmd->sense_buffer; |
246619da | 624 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
625 | |
626 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
627 | ||
0e5dec47 | 628 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 629 | |
b095518e JG |
630 | /* |
631 | * Use ata_to_sense_error() to map status register bits | |
632 | * onto sense key, asc & ascq. | |
633 | */ | |
058e55e1 TH |
634 | if (qc->err_mask || |
635 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
b095518e | 636 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
246619da | 637 | &sb[2], &sb[12], &sb[13], verbose); |
b095518e | 638 | sb[2] &= 0x0f; |
1da177e4 | 639 | } |
1da177e4 LT |
640 | |
641 | sb[0] = 0x70; | |
b095518e | 642 | sb[7] = 0x0a; |
0274aa25 | 643 | |
a7dac447 JG |
644 | if (tf->flags & ATA_TFLAG_LBA48) { |
645 | /* TODO: find solution for LBA48 descriptors */ | |
646 | } | |
647 | ||
648 | else if (tf->flags & ATA_TFLAG_LBA) { | |
b095518e JG |
649 | /* A small (28b) LBA will fit in the 32b info field */ |
650 | sb[0] |= 0x80; /* set valid bit */ | |
651 | sb[3] = tf->device & 0x0f; | |
652 | sb[4] = tf->lbah; | |
653 | sb[5] = tf->lbam; | |
654 | sb[6] = tf->lbal; | |
1da177e4 | 655 | } |
a7dac447 JG |
656 | |
657 | else { | |
658 | /* TODO: C/H/S */ | |
659 | } | |
1da177e4 LT |
660 | } |
661 | ||
a6cce2a7 BK |
662 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
663 | { | |
664 | sdev->use_10_for_rw = 1; | |
665 | sdev->use_10_for_ms = 1; | |
666 | } | |
667 | ||
668 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
669 | struct ata_device *dev) | |
670 | { | |
671 | unsigned int max_sectors; | |
672 | ||
673 | /* TODO: 2048 is an arbitrary number, not the | |
674 | * hardware maximum. This should be increased to | |
675 | * 65534 when Jens Axboe's patch for dynamically | |
676 | * determining max_sectors is merged. | |
677 | */ | |
678 | max_sectors = ATA_MAX_SECTORS; | |
679 | if (dev->flags & ATA_DFLAG_LBA48) | |
200d5a76 | 680 | max_sectors = ATA_MAX_SECTORS_LBA48; |
a6cce2a7 BK |
681 | if (dev->max_sectors) |
682 | max_sectors = dev->max_sectors; | |
683 | ||
684 | blk_queue_max_sectors(sdev->request_queue, max_sectors); | |
685 | ||
686 | /* | |
687 | * SATA DMA transfers must be multiples of 4 byte, so | |
688 | * we need to pad ATAPI transfers using an extra sg. | |
689 | * Decrement max hw segments accordingly. | |
690 | */ | |
691 | if (dev->class == ATA_DEV_ATAPI) { | |
692 | request_queue_t *q = sdev->request_queue; | |
693 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); | |
694 | } | |
a6e6ce8e TH |
695 | |
696 | if (dev->flags & ATA_DFLAG_NCQ) { | |
697 | int depth; | |
698 | ||
699 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
700 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
701 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
702 | } | |
a6cce2a7 BK |
703 | } |
704 | ||
1da177e4 LT |
705 | /** |
706 | * ata_scsi_slave_config - Set SCSI device attributes | |
707 | * @sdev: SCSI device to examine | |
708 | * | |
709 | * This is called before we actually start reading | |
710 | * and writing to the device, to configure certain | |
711 | * SCSI mid-layer behaviors. | |
712 | * | |
713 | * LOCKING: | |
714 | * Defined by SCSI layer. We don't really care. | |
715 | */ | |
716 | ||
717 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
718 | { | |
31534363 TH |
719 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
720 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
721 | ||
a6cce2a7 | 722 | ata_scsi_sdev_config(sdev); |
1da177e4 LT |
723 | |
724 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
725 | ||
31534363 | 726 | if (dev) |
a6cce2a7 | 727 | ata_scsi_dev_config(sdev, dev); |
1da177e4 LT |
728 | |
729 | return 0; /* scsi layer doesn't check return value, sigh */ | |
730 | } | |
731 | ||
83c47bcb TH |
732 | /** |
733 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
734 | * @sdev: SCSI device to be destroyed | |
735 | * | |
736 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
737 | * this unplugging was initiated by libata as indicated by NULL | |
738 | * dev->sdev, this function doesn't have to do anything. | |
739 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
740 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
741 | * EH. | |
742 | * | |
743 | * LOCKING: | |
744 | * Defined by SCSI layer. We don't really care. | |
745 | */ | |
746 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
747 | { | |
748 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
749 | unsigned long flags; | |
750 | struct ata_device *dev; | |
751 | ||
752 | if (!ap->ops->error_handler) | |
753 | return; | |
754 | ||
ba6a1308 | 755 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
756 | dev = __ata_scsi_find_dev(ap, sdev); |
757 | if (dev && dev->sdev) { | |
758 | /* SCSI device already in CANCEL state, no need to offline it */ | |
759 | dev->sdev = NULL; | |
760 | dev->flags |= ATA_DFLAG_DETACH; | |
761 | ata_port_schedule_eh(ap); | |
762 | } | |
ba6a1308 | 763 | spin_unlock_irqrestore(ap->lock, flags); |
83c47bcb TH |
764 | } |
765 | ||
a6e6ce8e TH |
766 | /** |
767 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
768 | * @sdev: SCSI device to configure queue depth for | |
769 | * @queue_depth: new queue depth | |
770 | * | |
771 | * This is libata standard hostt->change_queue_depth callback. | |
772 | * SCSI will call into this callback when user tries to set queue | |
773 | * depth via sysfs. | |
774 | * | |
775 | * LOCKING: | |
776 | * SCSI layer (we don't care) | |
777 | * | |
778 | * RETURNS: | |
779 | * Newly configured queue depth. | |
780 | */ | |
781 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
782 | { | |
783 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
784 | struct ata_device *dev; | |
785 | int max_depth; | |
786 | ||
787 | if (queue_depth < 1) | |
788 | return sdev->queue_depth; | |
789 | ||
790 | dev = ata_scsi_find_dev(ap, sdev); | |
791 | if (!dev || !ata_dev_enabled(dev)) | |
792 | return sdev->queue_depth; | |
793 | ||
794 | max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
795 | max_depth = min(ATA_MAX_QUEUE - 1, max_depth); | |
796 | if (queue_depth > max_depth) | |
797 | queue_depth = max_depth; | |
798 | ||
799 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
800 | return queue_depth; | |
801 | } | |
802 | ||
972dcafb DG |
803 | /** |
804 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
805 | * @qc: Storage for translated ATA taskfile | |
806 | * @scsicmd: SCSI command to translate | |
807 | * | |
808 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
809 | * (to start). Perhaps these commands should be preceded by | |
810 | * CHECK POWER MODE to see what power mode the device is already in. | |
811 | * [See SAT revision 5 at www.t10.org] | |
812 | * | |
813 | * LOCKING: | |
814 | * spin_lock_irqsave(host_set lock) | |
815 | * | |
816 | * RETURNS: | |
817 | * Zero on success, non-zero on error. | |
818 | */ | |
819 | ||
820 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, | |
057ace5e | 821 | const u8 *scsicmd) |
972dcafb DG |
822 | { |
823 | struct ata_taskfile *tf = &qc->tf; | |
824 | ||
825 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
826 | tf->protocol = ATA_PROT_NODATA; | |
827 | if (scsicmd[1] & 0x1) { | |
828 | ; /* ignore IMMED bit, violates sat-r05 */ | |
829 | } | |
830 | if (scsicmd[4] & 0x2) | |
ae006510 | 831 | goto invalid_fld; /* LOEJ bit set not supported */ |
972dcafb | 832 | if (((scsicmd[4] >> 4) & 0xf) != 0) |
ae006510 | 833 | goto invalid_fld; /* power conditions not supported */ |
972dcafb DG |
834 | if (scsicmd[4] & 0x1) { |
835 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
9d5b1302 AL |
836 | |
837 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 838 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
839 | |
840 | tf->lbah = 0x0; | |
841 | tf->lbam = 0x0; | |
842 | tf->lbal = 0x0; | |
843 | tf->device |= ATA_LBA; | |
844 | } else { | |
845 | /* CHS */ | |
846 | tf->lbal = 0x1; /* sect */ | |
847 | tf->lbam = 0x0; /* cyl low */ | |
848 | tf->lbah = 0x0; /* cyl high */ | |
849 | } | |
850 | ||
972dcafb DG |
851 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
852 | } else { | |
853 | tf->nsect = 0; /* time period value (0 implies now) */ | |
854 | tf->command = ATA_CMD_STANDBY; | |
855 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
856 | } | |
857 | /* | |
858 | * Standby and Idle condition timers could be implemented but that | |
859 | * would require libata to implement the Power condition mode page | |
860 | * and allow the user to change it. Changing mode pages requires | |
861 | * MODE SELECT to be implemented. | |
862 | */ | |
863 | ||
864 | return 0; | |
ae006510 DG |
865 | |
866 | invalid_fld: | |
867 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
868 | /* "Invalid field in cbd" */ | |
869 | return 1; | |
972dcafb DG |
870 | } |
871 | ||
872 | ||
1da177e4 LT |
873 | /** |
874 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
875 | * @qc: Storage for translated ATA taskfile | |
876 | * @scsicmd: SCSI command to translate (ignored) | |
877 | * | |
878 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
879 | * FLUSH CACHE EXT. | |
880 | * | |
881 | * LOCKING: | |
882 | * spin_lock_irqsave(host_set lock) | |
883 | * | |
884 | * RETURNS: | |
885 | * Zero on success, non-zero on error. | |
886 | */ | |
887 | ||
057ace5e | 888 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
889 | { |
890 | struct ata_taskfile *tf = &qc->tf; | |
891 | ||
892 | tf->flags |= ATA_TFLAG_DEVICE; | |
893 | tf->protocol = ATA_PROT_NODATA; | |
894 | ||
07506697 | 895 | if ((qc->dev->flags & ATA_DFLAG_LBA48) && |
1da177e4 LT |
896 | (ata_id_has_flush_ext(qc->dev->id))) |
897 | tf->command = ATA_CMD_FLUSH_EXT; | |
898 | else | |
899 | tf->command = ATA_CMD_FLUSH; | |
900 | ||
901 | return 0; | |
902 | } | |
903 | ||
3aef5231 AL |
904 | /** |
905 | * scsi_6_lba_len - Get LBA and transfer length | |
906 | * @scsicmd: SCSI command to translate | |
907 | * | |
908 | * Calculate LBA and transfer length for 6-byte commands. | |
909 | * | |
910 | * RETURNS: | |
911 | * @plba: the LBA | |
912 | * @plen: the transfer length | |
913 | */ | |
914 | ||
057ace5e | 915 | static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
916 | { |
917 | u64 lba = 0; | |
918 | u32 len = 0; | |
919 | ||
920 | VPRINTK("six-byte command\n"); | |
921 | ||
922 | lba |= ((u64)scsicmd[2]) << 8; | |
923 | lba |= ((u64)scsicmd[3]); | |
924 | ||
925 | len |= ((u32)scsicmd[4]); | |
926 | ||
927 | *plba = lba; | |
928 | *plen = len; | |
929 | } | |
930 | ||
931 | /** | |
932 | * scsi_10_lba_len - Get LBA and transfer length | |
933 | * @scsicmd: SCSI command to translate | |
934 | * | |
935 | * Calculate LBA and transfer length for 10-byte commands. | |
936 | * | |
937 | * RETURNS: | |
938 | * @plba: the LBA | |
939 | * @plen: the transfer length | |
940 | */ | |
941 | ||
057ace5e | 942 | static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
943 | { |
944 | u64 lba = 0; | |
945 | u32 len = 0; | |
946 | ||
947 | VPRINTK("ten-byte command\n"); | |
948 | ||
949 | lba |= ((u64)scsicmd[2]) << 24; | |
950 | lba |= ((u64)scsicmd[3]) << 16; | |
951 | lba |= ((u64)scsicmd[4]) << 8; | |
952 | lba |= ((u64)scsicmd[5]); | |
953 | ||
954 | len |= ((u32)scsicmd[7]) << 8; | |
955 | len |= ((u32)scsicmd[8]); | |
956 | ||
957 | *plba = lba; | |
958 | *plen = len; | |
959 | } | |
960 | ||
961 | /** | |
962 | * scsi_16_lba_len - Get LBA and transfer length | |
963 | * @scsicmd: SCSI command to translate | |
964 | * | |
965 | * Calculate LBA and transfer length for 16-byte commands. | |
966 | * | |
967 | * RETURNS: | |
968 | * @plba: the LBA | |
969 | * @plen: the transfer length | |
970 | */ | |
971 | ||
057ace5e | 972 | static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
973 | { |
974 | u64 lba = 0; | |
975 | u32 len = 0; | |
976 | ||
977 | VPRINTK("sixteen-byte command\n"); | |
978 | ||
979 | lba |= ((u64)scsicmd[2]) << 56; | |
980 | lba |= ((u64)scsicmd[3]) << 48; | |
981 | lba |= ((u64)scsicmd[4]) << 40; | |
982 | lba |= ((u64)scsicmd[5]) << 32; | |
983 | lba |= ((u64)scsicmd[6]) << 24; | |
984 | lba |= ((u64)scsicmd[7]) << 16; | |
985 | lba |= ((u64)scsicmd[8]) << 8; | |
986 | lba |= ((u64)scsicmd[9]); | |
987 | ||
988 | len |= ((u32)scsicmd[10]) << 24; | |
989 | len |= ((u32)scsicmd[11]) << 16; | |
990 | len |= ((u32)scsicmd[12]) << 8; | |
991 | len |= ((u32)scsicmd[13]); | |
992 | ||
993 | *plba = lba; | |
994 | *plen = len; | |
995 | } | |
996 | ||
1da177e4 LT |
997 | /** |
998 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
999 | * @qc: Storage for translated ATA taskfile | |
1000 | * @scsicmd: SCSI command to translate | |
1001 | * | |
1002 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1003 | * | |
1004 | * LOCKING: | |
1005 | * spin_lock_irqsave(host_set lock) | |
1006 | * | |
1007 | * RETURNS: | |
1008 | * Zero on success, non-zero on error. | |
1009 | */ | |
1010 | ||
057ace5e | 1011 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
1012 | { |
1013 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece | 1014 | struct ata_device *dev = qc->dev; |
1da177e4 | 1015 | u64 dev_sectors = qc->dev->n_sectors; |
3aef5231 AL |
1016 | u64 block; |
1017 | u32 n_block; | |
1da177e4 LT |
1018 | |
1019 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1020 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1021 | |
3aef5231 AL |
1022 | if (scsicmd[0] == VERIFY) |
1023 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
1024 | else if (scsicmd[0] == VERIFY_16) | |
1025 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1da177e4 | 1026 | else |
ae006510 | 1027 | goto invalid_fld; |
1da177e4 | 1028 | |
8bf62ece | 1029 | if (!n_block) |
ae006510 | 1030 | goto nothing_to_do; |
8bf62ece | 1031 | if (block >= dev_sectors) |
ae006510 | 1032 | goto out_of_range; |
8bf62ece | 1033 | if ((block + n_block) > dev_sectors) |
ae006510 | 1034 | goto out_of_range; |
1da177e4 | 1035 | |
07506697 AL |
1036 | if (dev->flags & ATA_DFLAG_LBA) { |
1037 | tf->flags |= ATA_TFLAG_LBA; | |
1038 | ||
c6a33e24 AL |
1039 | if (lba_28_ok(block, n_block)) { |
1040 | /* use LBA28 */ | |
1041 | tf->command = ATA_CMD_VERIFY; | |
1042 | tf->device |= (block >> 24) & 0xf; | |
1043 | } else if (lba_48_ok(block, n_block)) { | |
1044 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1045 | goto out_of_range; | |
07506697 AL |
1046 | |
1047 | /* use LBA48 */ | |
1048 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1049 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1050 | |
8bf62ece | 1051 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1052 | |
8bf62ece AL |
1053 | tf->hob_lbah = (block >> 40) & 0xff; |
1054 | tf->hob_lbam = (block >> 32) & 0xff; | |
1055 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1056 | } else |
1057 | /* request too large even for LBA48 */ | |
1058 | goto out_of_range; | |
8bf62ece AL |
1059 | |
1060 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1061 | |
8bf62ece AL |
1062 | tf->lbah = (block >> 16) & 0xff; |
1063 | tf->lbam = (block >> 8) & 0xff; | |
1064 | tf->lbal = block & 0xff; | |
1da177e4 | 1065 | |
8bf62ece AL |
1066 | tf->device |= ATA_LBA; |
1067 | } else { | |
1068 | /* CHS */ | |
1069 | u32 sect, head, cyl, track; | |
1070 | ||
c6a33e24 AL |
1071 | if (!lba_28_ok(block, n_block)) |
1072 | goto out_of_range; | |
07506697 | 1073 | |
8bf62ece AL |
1074 | /* Convert LBA to CHS */ |
1075 | track = (u32)block / dev->sectors; | |
1076 | cyl = track / dev->heads; | |
1077 | head = track % dev->heads; | |
1078 | sect = (u32)block % dev->sectors + 1; | |
1079 | ||
c187c4b5 AL |
1080 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1081 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1082 | |
1083 | /* Check whether the converted CHS can fit. | |
1084 | Cylinder: 0-65535 | |
8bf62ece AL |
1085 | Head: 0-15 |
1086 | Sector: 1-255*/ | |
2e9edbf8 | 1087 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1088 | goto out_of_range; |
2e9edbf8 | 1089 | |
8bf62ece AL |
1090 | tf->command = ATA_CMD_VERIFY; |
1091 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1092 | tf->lbal = sect; | |
1093 | tf->lbam = cyl; | |
1094 | tf->lbah = cyl >> 8; | |
1095 | tf->device |= head; | |
1096 | } | |
1da177e4 LT |
1097 | |
1098 | return 0; | |
ae006510 DG |
1099 | |
1100 | invalid_fld: | |
1101 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1102 | /* "Invalid field in cbd" */ | |
1103 | return 1; | |
1104 | ||
1105 | out_of_range: | |
1106 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1107 | /* "Logical Block Address out of range" */ | |
1108 | return 1; | |
1109 | ||
1110 | nothing_to_do: | |
1111 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1112 | return 1; | |
1da177e4 LT |
1113 | } |
1114 | ||
1115 | /** | |
1116 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1117 | * @qc: Storage for translated ATA taskfile | |
1118 | * @scsicmd: SCSI command to translate | |
1119 | * | |
1120 | * Converts any of six SCSI read/write commands into the | |
1121 | * ATA counterpart, including starting sector (LBA), | |
1122 | * sector count, and taking into account the device's LBA48 | |
1123 | * support. | |
1124 | * | |
1125 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1126 | * %WRITE_16 are currently supported. | |
1127 | * | |
1128 | * LOCKING: | |
1129 | * spin_lock_irqsave(host_set lock) | |
1130 | * | |
1131 | * RETURNS: | |
1132 | * Zero on success, non-zero on error. | |
1133 | */ | |
1134 | ||
057ace5e | 1135 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
1136 | { |
1137 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece | 1138 | struct ata_device *dev = qc->dev; |
3aef5231 AL |
1139 | u64 block; |
1140 | u32 n_block; | |
1da177e4 | 1141 | |
27197367 | 1142 | qc->flags |= ATA_QCFLAG_IO; |
1da177e4 | 1143 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1da177e4 | 1144 | |
8cbd6df1 AL |
1145 | if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || |
1146 | scsicmd[0] == WRITE_16) | |
1da177e4 | 1147 | tf->flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1148 | |
9a3dccc4 | 1149 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
3aef5231 AL |
1150 | switch (scsicmd[0]) { |
1151 | case READ_10: | |
1152 | case WRITE_10: | |
1153 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
9a3dccc4 TH |
1154 | if (unlikely(scsicmd[1] & (1 << 3))) |
1155 | tf->flags |= ATA_TFLAG_FUA; | |
3aef5231 AL |
1156 | break; |
1157 | case READ_6: | |
1158 | case WRITE_6: | |
1159 | scsi_6_lba_len(scsicmd, &block, &n_block); | |
c187c4b5 AL |
1160 | |
1161 | /* for 6-byte r/w commands, transfer length 0 | |
1162 | * means 256 blocks of data, not 0 block. | |
1163 | */ | |
76b2bf9b JG |
1164 | if (!n_block) |
1165 | n_block = 256; | |
3aef5231 AL |
1166 | break; |
1167 | case READ_16: | |
1168 | case WRITE_16: | |
1169 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
9a3dccc4 TH |
1170 | if (unlikely(scsicmd[1] & (1 << 3))) |
1171 | tf->flags |= ATA_TFLAG_FUA; | |
3aef5231 AL |
1172 | break; |
1173 | default: | |
8bf62ece | 1174 | DPRINTK("no-byte command\n"); |
ae006510 | 1175 | goto invalid_fld; |
1da177e4 LT |
1176 | } |
1177 | ||
8bf62ece AL |
1178 | /* Check and compose ATA command */ |
1179 | if (!n_block) | |
c187c4b5 AL |
1180 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1181 | * length 0 means transfer 0 block of data. | |
1182 | * However, for ATA R/W commands, sector count 0 means | |
1183 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1184 | * |
1185 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1186 | */ |
ae006510 | 1187 | goto nothing_to_do; |
1da177e4 | 1188 | |
3dc1d881 TH |
1189 | if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) { |
1190 | /* yay, NCQ */ | |
1191 | if (!lba_48_ok(block, n_block)) | |
1192 | goto out_of_range; | |
1193 | ||
1194 | tf->protocol = ATA_PROT_NCQ; | |
1195 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1196 | ||
1197 | if (tf->flags & ATA_TFLAG_WRITE) | |
1198 | tf->command = ATA_CMD_FPDMA_WRITE; | |
1199 | else | |
1200 | tf->command = ATA_CMD_FPDMA_READ; | |
1201 | ||
1202 | qc->nsect = n_block; | |
1203 | ||
1204 | tf->nsect = qc->tag << 3; | |
1205 | tf->hob_feature = (n_block >> 8) & 0xff; | |
1206 | tf->feature = n_block & 0xff; | |
1207 | ||
1208 | tf->hob_lbah = (block >> 40) & 0xff; | |
1209 | tf->hob_lbam = (block >> 32) & 0xff; | |
1210 | tf->hob_lbal = (block >> 24) & 0xff; | |
1211 | tf->lbah = (block >> 16) & 0xff; | |
1212 | tf->lbam = (block >> 8) & 0xff; | |
1213 | tf->lbal = block & 0xff; | |
1214 | ||
1215 | tf->device = 1 << 6; | |
1216 | if (tf->flags & ATA_TFLAG_FUA) | |
1217 | tf->device |= 1 << 7; | |
1218 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
07506697 AL |
1219 | tf->flags |= ATA_TFLAG_LBA; |
1220 | ||
c6a33e24 AL |
1221 | if (lba_28_ok(block, n_block)) { |
1222 | /* use LBA28 */ | |
1223 | tf->device |= (block >> 24) & 0xf; | |
1224 | } else if (lba_48_ok(block, n_block)) { | |
1225 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
ae006510 | 1226 | goto out_of_range; |
1da177e4 | 1227 | |
07506697 AL |
1228 | /* use LBA48 */ |
1229 | tf->flags |= ATA_TFLAG_LBA48; | |
1230 | ||
8bf62ece AL |
1231 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1232 | ||
1233 | tf->hob_lbah = (block >> 40) & 0xff; | |
1234 | tf->hob_lbam = (block >> 32) & 0xff; | |
1235 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1236 | } else |
1237 | /* request too large even for LBA48 */ | |
1238 | goto out_of_range; | |
c187c4b5 | 1239 | |
9a3dccc4 TH |
1240 | if (unlikely(ata_rwcmd_protocol(qc) < 0)) |
1241 | goto invalid_fld; | |
8cbd6df1 | 1242 | |
8bf62ece AL |
1243 | qc->nsect = n_block; |
1244 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1245 | |
8bf62ece AL |
1246 | tf->lbah = (block >> 16) & 0xff; |
1247 | tf->lbam = (block >> 8) & 0xff; | |
1248 | tf->lbal = block & 0xff; | |
1da177e4 | 1249 | |
8bf62ece | 1250 | tf->device |= ATA_LBA; |
2e9edbf8 | 1251 | } else { |
8bf62ece AL |
1252 | /* CHS */ |
1253 | u32 sect, head, cyl, track; | |
1254 | ||
1255 | /* The request -may- be too large for CHS addressing. */ | |
c6a33e24 | 1256 | if (!lba_28_ok(block, n_block)) |
ae006510 | 1257 | goto out_of_range; |
c187c4b5 | 1258 | |
9a3dccc4 TH |
1259 | if (unlikely(ata_rwcmd_protocol(qc) < 0)) |
1260 | goto invalid_fld; | |
8cbd6df1 | 1261 | |
8bf62ece AL |
1262 | /* Convert LBA to CHS */ |
1263 | track = (u32)block / dev->sectors; | |
1264 | cyl = track / dev->heads; | |
1265 | head = track % dev->heads; | |
1266 | sect = (u32)block % dev->sectors + 1; | |
1267 | ||
c187c4b5 | 1268 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
8bf62ece | 1269 | (u32)block, track, cyl, head, sect); |
c187c4b5 | 1270 | |
2e9edbf8 JG |
1271 | /* Check whether the converted CHS can fit. |
1272 | Cylinder: 0-65535 | |
8bf62ece AL |
1273 | Head: 0-15 |
1274 | Sector: 1-255*/ | |
c187c4b5 | 1275 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1276 | goto out_of_range; |
c187c4b5 | 1277 | |
8bf62ece AL |
1278 | qc->nsect = n_block; |
1279 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1280 | tf->lbal = sect; | |
1281 | tf->lbam = cyl; | |
1282 | tf->lbah = cyl >> 8; | |
1283 | tf->device |= head; | |
1da177e4 LT |
1284 | } |
1285 | ||
8bf62ece | 1286 | return 0; |
ae006510 DG |
1287 | |
1288 | invalid_fld: | |
1289 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1290 | /* "Invalid field in cbd" */ | |
1291 | return 1; | |
1292 | ||
1293 | out_of_range: | |
1294 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1295 | /* "Logical Block Address out of range" */ | |
1296 | return 1; | |
1297 | ||
1298 | nothing_to_do: | |
1299 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1300 | return 1; | |
1da177e4 LT |
1301 | } |
1302 | ||
77853bf2 | 1303 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
1304 | { |
1305 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a7dac447 | 1306 | u8 *cdb = cmd->cmnd; |
a22e2eb0 | 1307 | int need_sense = (qc->err_mask != 0); |
b095518e | 1308 | |
3057ac3c | 1309 | /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and |
1310 | * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE | |
1311 | * cache | |
1312 | */ | |
1313 | if (!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) && | |
1314 | ((qc->tf.feature == SETFEATURES_WC_ON) || | |
1315 | (qc->tf.feature == SETFEATURES_WC_OFF))) { | |
1316 | qc->ap->eh_info.action |= ATA_EH_REVALIDATE; | |
1317 | ata_port_schedule_eh(qc->ap); | |
1318 | } | |
1319 | ||
b095518e JG |
1320 | /* For ATA pass thru (SAT) commands, generate a sense block if |
1321 | * user mandated it or if there's an error. Note that if we | |
1322 | * generate because the user forced us to, a check condition | |
1323 | * is generated and the ATA register values are returned | |
1324 | * whether the command completed successfully or not. If there | |
1325 | * was no error, SK, ASC and ASCQ will all be zero. | |
1326 | */ | |
a7dac447 JG |
1327 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
1328 | ((cdb[2] & 0x20) || need_sense)) { | |
b095518e JG |
1329 | ata_gen_ata_desc_sense(qc); |
1330 | } else { | |
1331 | if (!need_sense) { | |
1332 | cmd->result = SAM_STAT_GOOD; | |
1333 | } else { | |
1334 | /* TODO: decide which descriptor format to use | |
1335 | * for 48b LBA devices and call that here | |
1336 | * instead of the fixed desc, which is only | |
1337 | * good for smaller LBA (and maybe CHS?) | |
1338 | * devices. | |
1339 | */ | |
1340 | ata_gen_fixed_sense(qc); | |
1341 | } | |
1342 | } | |
1da177e4 | 1343 | |
246619da | 1344 | if (need_sense && !qc->ap->ops->error_handler) |
e61e0672 | 1345 | ata_dump_status(qc->ap->id, &qc->result_tf); |
1da177e4 LT |
1346 | |
1347 | qc->scsidone(cmd); | |
1348 | ||
77853bf2 | 1349 | ata_qc_free(qc); |
1da177e4 LT |
1350 | } |
1351 | ||
3dc1d881 TH |
1352 | /** |
1353 | * ata_scmd_need_defer - Check whether we need to defer scmd | |
1354 | * @dev: ATA device to which the command is addressed | |
1355 | * @is_io: Is the command IO (and thus possibly NCQ)? | |
1356 | * | |
1357 | * NCQ and non-NCQ commands cannot run together. As upper layer | |
1358 | * only knows the queue depth, we are responsible for maintaining | |
1359 | * exclusion. This function checks whether a new command can be | |
1360 | * issued to @dev. | |
1361 | * | |
1362 | * LOCKING: | |
1363 | * spin_lock_irqsave(host_set lock) | |
1364 | * | |
1365 | * RETURNS: | |
1366 | * 1 if deferring is needed, 0 otherwise. | |
1367 | */ | |
1368 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) | |
1369 | { | |
1370 | struct ata_port *ap = dev->ap; | |
1371 | ||
1372 | if (!(dev->flags & ATA_DFLAG_NCQ)) | |
1373 | return 0; | |
1374 | ||
1375 | if (is_io) { | |
1376 | if (!ata_tag_valid(ap->active_tag)) | |
1377 | return 0; | |
1378 | } else { | |
1379 | if (!ata_tag_valid(ap->active_tag) && !ap->sactive) | |
1380 | return 0; | |
1381 | } | |
1382 | return 1; | |
1383 | } | |
1384 | ||
1da177e4 LT |
1385 | /** |
1386 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1387 | * @dev: ATA device to which the command is addressed |
1388 | * @cmd: SCSI command to execute | |
1389 | * @done: SCSI command completion function | |
1390 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1391 | * | |
1392 | * Our ->queuecommand() function has decided that the SCSI | |
1393 | * command issued can be directly translated into an ATA | |
1394 | * command, rather than handled internally. | |
1395 | * | |
1396 | * This function sets up an ata_queued_cmd structure for the | |
1397 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1398 | * | |
ae006510 DG |
1399 | * The xlat_func argument (actor) returns 0 if ready to execute |
1400 | * ATA command, else 1 to finish translation. If 1 is returned | |
1401 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1402 | * to be set reflecting an error condition or clean (early) | |
1403 | * termination. | |
1404 | * | |
1da177e4 LT |
1405 | * LOCKING: |
1406 | * spin_lock_irqsave(host_set lock) | |
2115ea94 TH |
1407 | * |
1408 | * RETURNS: | |
1409 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1410 | * needs to be deferred. | |
1da177e4 | 1411 | */ |
2115ea94 TH |
1412 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1413 | void (*done)(struct scsi_cmnd *), | |
1414 | ata_xlat_func_t xlat_func) | |
1da177e4 LT |
1415 | { |
1416 | struct ata_queued_cmd *qc; | |
1417 | u8 *scsicmd = cmd->cmnd; | |
3dc1d881 | 1418 | int is_io = xlat_func == ata_scsi_rw_xlat; |
1da177e4 LT |
1419 | |
1420 | VPRINTK("ENTER\n"); | |
1421 | ||
3dc1d881 TH |
1422 | if (unlikely(ata_scmd_need_defer(dev, is_io))) |
1423 | goto defer; | |
1424 | ||
3373efd8 | 1425 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1426 | if (!qc) |
ae006510 | 1427 | goto err_mem; |
1da177e4 LT |
1428 | |
1429 | /* data is present; dma-map it */ | |
be7db055 CH |
1430 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1431 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 | 1432 | if (unlikely(cmd->request_bufflen < 1)) { |
f15a1daf TH |
1433 | ata_dev_printk(dev, KERN_WARNING, |
1434 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1435 | goto err_did; |
1da177e4 LT |
1436 | } |
1437 | ||
1438 | if (cmd->use_sg) | |
1439 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1440 | else | |
1441 | ata_sg_init_one(qc, cmd->request_buffer, | |
1442 | cmd->request_bufflen); | |
1443 | ||
1444 | qc->dma_dir = cmd->sc_data_direction; | |
1445 | } | |
1446 | ||
1447 | qc->complete_fn = ata_scsi_qc_complete; | |
1448 | ||
1449 | if (xlat_func(qc, scsicmd)) | |
ae006510 | 1450 | goto early_finish; |
1da177e4 LT |
1451 | |
1452 | /* select device, send command to hardware */ | |
8e0e694a | 1453 | ata_qc_issue(qc); |
1da177e4 LT |
1454 | |
1455 | VPRINTK("EXIT\n"); | |
2115ea94 | 1456 | return 0; |
1da177e4 | 1457 | |
ae006510 DG |
1458 | early_finish: |
1459 | ata_qc_free(qc); | |
1460 | done(cmd); | |
1461 | DPRINTK("EXIT - early finish (good or error)\n"); | |
2115ea94 | 1462 | return 0; |
ae006510 DG |
1463 | |
1464 | err_did: | |
1da177e4 | 1465 | ata_qc_free(qc); |
ae006510 DG |
1466 | err_mem: |
1467 | cmd->result = (DID_ERROR << 16); | |
1468 | done(cmd); | |
1469 | DPRINTK("EXIT - internal\n"); | |
2115ea94 | 1470 | return 0; |
3dc1d881 TH |
1471 | |
1472 | defer: | |
1473 | DPRINTK("EXIT - defer\n"); | |
1474 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | /** | |
1478 | * ata_scsi_rbuf_get - Map response buffer. | |
1479 | * @cmd: SCSI command containing buffer to be mapped. | |
1480 | * @buf_out: Pointer to mapped area. | |
1481 | * | |
1482 | * Maps buffer contained within SCSI command @cmd. | |
1483 | * | |
1484 | * LOCKING: | |
1485 | * spin_lock_irqsave(host_set lock) | |
1486 | * | |
1487 | * RETURNS: | |
1488 | * Length of response buffer. | |
1489 | */ | |
1490 | ||
1491 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1492 | { | |
1493 | u8 *buf; | |
1494 | unsigned int buflen; | |
1495 | ||
1496 | if (cmd->use_sg) { | |
1497 | struct scatterlist *sg; | |
1498 | ||
1499 | sg = (struct scatterlist *) cmd->request_buffer; | |
1500 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
1501 | buflen = sg->length; | |
1502 | } else { | |
1503 | buf = cmd->request_buffer; | |
1504 | buflen = cmd->request_bufflen; | |
1505 | } | |
1506 | ||
1507 | *buf_out = buf; | |
1508 | return buflen; | |
1509 | } | |
1510 | ||
1511 | /** | |
1512 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1513 | * @cmd: SCSI command containing buffer to be unmapped. | |
1514 | * @buf: buffer to unmap | |
1515 | * | |
1516 | * Unmaps response buffer contained within @cmd. | |
1517 | * | |
1518 | * LOCKING: | |
1519 | * spin_lock_irqsave(host_set lock) | |
1520 | */ | |
1521 | ||
1522 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1523 | { | |
1524 | if (cmd->use_sg) { | |
1525 | struct scatterlist *sg; | |
1526 | ||
1527 | sg = (struct scatterlist *) cmd->request_buffer; | |
1528 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | /** | |
1533 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1534 | * @args: device IDENTIFY data / SCSI command of interest. | |
1535 | * @actor: Callback hook for desired SCSI command simulator | |
1536 | * | |
1537 | * Takes care of the hard work of simulating a SCSI command... | |
1538 | * Mapping the response buffer, calling the command's handler, | |
1539 | * and handling the handler's return value. This return value | |
1540 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1541 | * completed successfully (0), or not (in which case cmd->result |
1542 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1543 | * |
1544 | * LOCKING: | |
1545 | * spin_lock_irqsave(host_set lock) | |
1546 | */ | |
1547 | ||
1548 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1549 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1550 | u8 *rbuf, unsigned int buflen)) | |
1551 | { | |
1552 | u8 *rbuf; | |
1553 | unsigned int buflen, rc; | |
1554 | struct scsi_cmnd *cmd = args->cmd; | |
1555 | ||
1556 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1557 | memset(rbuf, 0, buflen); | |
1558 | rc = actor(args, rbuf, buflen); | |
1559 | ata_scsi_rbuf_put(cmd, rbuf); | |
1560 | ||
ae006510 | 1561 | if (rc == 0) |
1da177e4 | 1562 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1563 | args->done(cmd); |
1da177e4 LT |
1564 | } |
1565 | ||
1566 | /** | |
1567 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1568 | * @args: device IDENTIFY data / SCSI command of interest. | |
1569 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1570 | * @buflen: Response buffer length. | |
1571 | * | |
1572 | * Returns standard device identification data associated | |
b142eb65 | 1573 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1574 | * |
1575 | * LOCKING: | |
1576 | * spin_lock_irqsave(host_set lock) | |
1577 | */ | |
1578 | ||
1579 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1580 | unsigned int buflen) | |
1581 | { | |
1582 | u8 hdr[] = { | |
1583 | TYPE_DISK, | |
1584 | 0, | |
1585 | 0x5, /* claim SPC-3 version compatibility */ | |
1586 | 2, | |
1587 | 95 - 4 | |
1588 | }; | |
1589 | ||
1590 | /* set scsi removeable (RMB) bit per ata bit */ | |
1591 | if (ata_id_removeable(args->id)) | |
1592 | hdr[1] |= (1 << 7); | |
1593 | ||
1594 | VPRINTK("ENTER\n"); | |
1595 | ||
1596 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1597 | ||
1598 | if (buflen > 35) { | |
1599 | memcpy(&rbuf[8], "ATA ", 8); | |
6a62a04d TH |
1600 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); |
1601 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1da177e4 LT |
1602 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1603 | memcpy(&rbuf[32], "n/a ", 4); | |
1604 | } | |
1605 | ||
1606 | if (buflen > 63) { | |
1607 | const u8 versions[] = { | |
1608 | 0x60, /* SAM-3 (no version claimed) */ | |
1609 | ||
1610 | 0x03, | |
1611 | 0x20, /* SBC-2 (no version claimed) */ | |
1612 | ||
1613 | 0x02, | |
1614 | 0x60 /* SPC-3 (no version claimed) */ | |
1615 | }; | |
1616 | ||
1617 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1618 | } | |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
1623 | /** | |
b142eb65 | 1624 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1625 | * @args: device IDENTIFY data / SCSI command of interest. |
1626 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1627 | * @buflen: Response buffer length. | |
1628 | * | |
b142eb65 | 1629 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1630 | * |
1631 | * LOCKING: | |
1632 | * spin_lock_irqsave(host_set lock) | |
1633 | */ | |
1634 | ||
1635 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1636 | unsigned int buflen) | |
1637 | { | |
1638 | const u8 pages[] = { | |
1639 | 0x00, /* page 0x00, this page */ | |
1640 | 0x80, /* page 0x80, unit serial no page */ | |
1641 | 0x83 /* page 0x83, device ident page */ | |
1642 | }; | |
b142eb65 | 1643 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1644 | |
1645 | if (buflen > 6) | |
1646 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1647 | ||
1648 | return 0; | |
1649 | } | |
1650 | ||
1651 | /** | |
b142eb65 | 1652 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1653 | * @args: device IDENTIFY data / SCSI command of interest. |
1654 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1655 | * @buflen: Response buffer length. | |
1656 | * | |
1657 | * Returns ATA device serial number. | |
1658 | * | |
1659 | * LOCKING: | |
1660 | * spin_lock_irqsave(host_set lock) | |
1661 | */ | |
1662 | ||
1663 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1664 | unsigned int buflen) | |
1665 | { | |
1666 | const u8 hdr[] = { | |
1667 | 0, | |
1668 | 0x80, /* this page code */ | |
1669 | 0, | |
1670 | ATA_SERNO_LEN, /* page len */ | |
1671 | }; | |
1672 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1673 | ||
1674 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
6a62a04d TH |
1675 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
1676 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1da177e4 LT |
1677 | |
1678 | return 0; | |
1679 | } | |
1680 | ||
1da177e4 | 1681 | /** |
b142eb65 | 1682 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1683 | * @args: device IDENTIFY data / SCSI command of interest. |
1684 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1685 | * @buflen: Response buffer length. | |
1686 | * | |
b142eb65 JG |
1687 | * Yields two logical unit device identification designators: |
1688 | * - vendor specific ASCII containing the ATA serial number | |
1689 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1690 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1691 | * |
1692 | * LOCKING: | |
1693 | * spin_lock_irqsave(host_set lock) | |
1694 | */ | |
1695 | ||
1696 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1697 | unsigned int buflen) | |
1698 | { | |
b142eb65 JG |
1699 | int num; |
1700 | const int sat_model_serial_desc_len = 68; | |
1701 | const int ata_model_byte_len = 40; | |
1da177e4 | 1702 | |
b142eb65 JG |
1703 | rbuf[1] = 0x83; /* this page code */ |
1704 | num = 4; | |
1705 | ||
1706 | if (buflen > (ATA_SERNO_LEN + num + 3)) { | |
1707 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ | |
2e9edbf8 | 1708 | rbuf[num + 0] = 2; |
b142eb65 JG |
1709 | rbuf[num + 3] = ATA_SERNO_LEN; |
1710 | num += 4; | |
1711 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1712 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1713 | num += ATA_SERNO_LEN; | |
1da177e4 | 1714 | } |
b142eb65 JG |
1715 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1716 | /* SAT defined lu model and serial numbers descriptor */ | |
1717 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1718 | rbuf[num + 0] = 2; |
1719 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1720 | rbuf[num + 3] = sat_model_serial_desc_len; |
1721 | num += 4; | |
1722 | memcpy(rbuf + num, "ATA ", 8); | |
1723 | num += 8; | |
1724 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1725 | ATA_ID_PROD_OFS, ata_model_byte_len); | |
1726 | num += ata_model_byte_len; | |
1727 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1728 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1729 | num += ATA_SERNO_LEN; | |
1730 | } | |
1731 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1732 | return 0; |
1733 | } | |
1734 | ||
1735 | /** | |
0cba632b | 1736 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1737 | * @args: device IDENTIFY data / SCSI command of interest. |
1738 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1739 | * @buflen: Response buffer length. | |
1740 | * | |
1741 | * No operation. Simply returns success to caller, to indicate | |
1742 | * that the caller should successfully complete this SCSI command. | |
1743 | * | |
1744 | * LOCKING: | |
1745 | * spin_lock_irqsave(host_set lock) | |
1746 | */ | |
1747 | ||
1748 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1749 | unsigned int buflen) | |
1750 | { | |
1751 | VPRINTK("ENTER\n"); | |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | /** | |
1756 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1757 | * @ptr_io: (input/output) Location to store more output data | |
1758 | * @last: End of output data buffer | |
1759 | * @buf: Pointer to BLOB being added to output buffer | |
1760 | * @buflen: Length of BLOB | |
1761 | * | |
1762 | * Store MODE SENSE data on an output buffer. | |
1763 | * | |
1764 | * LOCKING: | |
1765 | * None. | |
1766 | */ | |
1767 | ||
1768 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1769 | const u8 *buf, unsigned int buflen) | |
1770 | { | |
1771 | u8 *ptr = *ptr_io; | |
1772 | ||
1773 | if ((ptr + buflen - 1) > last) | |
1774 | return; | |
1775 | ||
1776 | memcpy(ptr, buf, buflen); | |
1777 | ||
1778 | ptr += buflen; | |
1779 | ||
1780 | *ptr_io = ptr; | |
1781 | } | |
1782 | ||
1783 | /** | |
1784 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1785 | * @id: device IDENTIFY data | |
1786 | * @ptr_io: (input/output) Location to store more output data | |
1787 | * @last: End of output data buffer | |
1788 | * | |
1789 | * Generate a caching info page, which conditionally indicates | |
1790 | * write caching to the SCSI layer, depending on device | |
1791 | * capabilities. | |
1792 | * | |
1793 | * LOCKING: | |
1794 | * None. | |
1795 | */ | |
1796 | ||
1797 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1798 | const u8 *last) | |
1799 | { | |
00ac37f5 | 1800 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1801 | |
00ac37f5 | 1802 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1803 | if (ata_id_wcache_enabled(id)) |
1804 | page[2] |= (1 << 2); /* write cache enable */ | |
1805 | if (!ata_id_rahead_enabled(id)) | |
1806 | page[12] |= (1 << 5); /* disable read ahead */ | |
1807 | ||
1808 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1809 | return sizeof(page); | |
1810 | } | |
1811 | ||
1812 | /** | |
1813 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1814 | * @dev: Device associated with this MODE SENSE command | |
1815 | * @ptr_io: (input/output) Location to store more output data | |
1816 | * @last: End of output data buffer | |
1817 | * | |
1818 | * Generate a generic MODE SENSE control mode page. | |
1819 | * | |
1820 | * LOCKING: | |
1821 | * None. | |
1822 | */ | |
1823 | ||
1824 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1825 | { | |
00ac37f5 DG |
1826 | ata_msense_push(ptr_io, last, def_control_mpage, |
1827 | sizeof(def_control_mpage)); | |
1828 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1829 | } |
1830 | ||
1831 | /** | |
1832 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1833 | * @dev: Device associated with this MODE SENSE command | |
1834 | * @ptr_io: (input/output) Location to store more output data | |
1835 | * @last: End of output data buffer | |
1836 | * | |
1837 | * Generate a generic MODE SENSE r/w error recovery page. | |
1838 | * | |
1839 | * LOCKING: | |
1840 | * None. | |
1841 | */ | |
1842 | ||
1843 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1844 | { | |
1da177e4 | 1845 | |
00ac37f5 DG |
1846 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
1847 | sizeof(def_rw_recovery_mpage)); | |
1848 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
1849 | } |
1850 | ||
48bdc8ec JA |
1851 | /* |
1852 | * We can turn this into a real blacklist if it's needed, for now just | |
1853 | * blacklist any Maxtor BANC1G10 revision firmware | |
1854 | */ | |
1855 | static int ata_dev_supports_fua(u16 *id) | |
1856 | { | |
1857 | unsigned char model[41], fw[9]; | |
1858 | ||
c3c013a2 JG |
1859 | if (!libata_fua) |
1860 | return 0; | |
48bdc8ec JA |
1861 | if (!ata_id_has_fua(id)) |
1862 | return 0; | |
1863 | ||
6a62a04d TH |
1864 | ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model)); |
1865 | ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw)); | |
48bdc8ec | 1866 | |
2e02671d | 1867 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 1868 | return 1; |
2e02671d | 1869 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
1870 | return 1; |
1871 | ||
1872 | return 0; /* blacklisted */ | |
1873 | } | |
1874 | ||
1da177e4 LT |
1875 | /** |
1876 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1877 | * @args: device IDENTIFY data / SCSI command of interest. | |
1878 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1879 | * @buflen: Response buffer length. | |
1880 | * | |
00ac37f5 DG |
1881 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
1882 | * access devices (e.g. disks) only. There should be no block | |
1883 | * descriptor for other device types. | |
1da177e4 LT |
1884 | * |
1885 | * LOCKING: | |
1886 | * spin_lock_irqsave(host_set lock) | |
1887 | */ | |
1888 | ||
1889 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1890 | unsigned int buflen) | |
1891 | { | |
9a3dccc4 | 1892 | struct ata_device *dev = args->dev; |
1da177e4 | 1893 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
1894 | const u8 sat_blk_desc[] = { |
1895 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
1896 | 0, | |
1897 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
1898 | }; | |
1899 | u8 pg, spg; | |
1900 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 1901 | u8 dpofua; |
1da177e4 LT |
1902 | |
1903 | VPRINTK("ENTER\n"); | |
1904 | ||
1905 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
1906 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
1907 | /* | |
1908 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 1909 | */ |
00ac37f5 | 1910 | |
1da177e4 | 1911 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
1912 | switch (page_control) { |
1913 | case 0: /* current */ | |
1914 | break; /* supported */ | |
1915 | case 3: /* saved */ | |
1916 | goto saving_not_supp; | |
1917 | case 1: /* changeable */ | |
1918 | case 2: /* defaults */ | |
1919 | default: | |
1920 | goto invalid_fld; | |
1921 | } | |
1da177e4 | 1922 | |
00ac37f5 DG |
1923 | if (six_byte) { |
1924 | output_len = 4 + (ebd ? 8 : 0); | |
1925 | alloc_len = scsicmd[4]; | |
1926 | } else { | |
1927 | output_len = 8 + (ebd ? 8 : 0); | |
1928 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
1929 | } | |
1930 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
1931 | |
1932 | p = rbuf + output_len; | |
00ac37f5 | 1933 | last = rbuf + minlen - 1; |
1da177e4 | 1934 | |
00ac37f5 DG |
1935 | pg = scsicmd[2] & 0x3f; |
1936 | spg = scsicmd[3]; | |
1937 | /* | |
1938 | * No mode subpages supported (yet) but asking for _all_ | |
1939 | * subpages may be valid | |
1940 | */ | |
1941 | if (spg && (spg != ALL_SUB_MPAGES)) | |
1942 | goto invalid_fld; | |
1943 | ||
1944 | switch(pg) { | |
1945 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
1946 | output_len += ata_msense_rw_recovery(&p, last); |
1947 | break; | |
1948 | ||
00ac37f5 | 1949 | case CACHE_MPAGE: |
1da177e4 LT |
1950 | output_len += ata_msense_caching(args->id, &p, last); |
1951 | break; | |
1952 | ||
00ac37f5 | 1953 | case CONTROL_MPAGE: { |
1da177e4 LT |
1954 | output_len += ata_msense_ctl_mode(&p, last); |
1955 | break; | |
1956 | } | |
1957 | ||
00ac37f5 | 1958 | case ALL_MPAGES: |
1da177e4 LT |
1959 | output_len += ata_msense_rw_recovery(&p, last); |
1960 | output_len += ata_msense_caching(args->id, &p, last); | |
1961 | output_len += ata_msense_ctl_mode(&p, last); | |
1962 | break; | |
1963 | ||
1964 | default: /* invalid page code */ | |
ae006510 | 1965 | goto invalid_fld; |
1da177e4 LT |
1966 | } |
1967 | ||
00ac37f5 DG |
1968 | if (minlen < 1) |
1969 | return 0; | |
9a3dccc4 TH |
1970 | |
1971 | dpofua = 0; | |
f79d409f | 1972 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
1973 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
1974 | dpofua = 1 << 4; | |
1975 | ||
1da177e4 LT |
1976 | if (six_byte) { |
1977 | output_len--; | |
1978 | rbuf[0] = output_len; | |
9a3dccc4 TH |
1979 | if (minlen > 2) |
1980 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
1981 | if (ebd) { |
1982 | if (minlen > 3) | |
1983 | rbuf[3] = sizeof(sat_blk_desc); | |
1984 | if (minlen > 11) | |
1985 | memcpy(rbuf + 4, sat_blk_desc, | |
1986 | sizeof(sat_blk_desc)); | |
1987 | } | |
1da177e4 LT |
1988 | } else { |
1989 | output_len -= 2; | |
1990 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
1991 | if (minlen > 1) |
1992 | rbuf[1] = output_len; | |
9a3dccc4 TH |
1993 | if (minlen > 3) |
1994 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
1995 | if (ebd) { |
1996 | if (minlen > 7) | |
1997 | rbuf[7] = sizeof(sat_blk_desc); | |
1998 | if (minlen > 15) | |
1999 | memcpy(rbuf + 8, sat_blk_desc, | |
2000 | sizeof(sat_blk_desc)); | |
2001 | } | |
1da177e4 | 2002 | } |
1da177e4 | 2003 | return 0; |
ae006510 DG |
2004 | |
2005 | invalid_fld: | |
2006 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2007 | /* "Invalid field in cbd" */ | |
2008 | return 1; | |
2009 | ||
2010 | saving_not_supp: | |
2011 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2012 | /* "Saving parameters not supported" */ | |
2013 | return 1; | |
1da177e4 LT |
2014 | } |
2015 | ||
2016 | /** | |
2017 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2018 | * @args: device IDENTIFY data / SCSI command of interest. | |
2019 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2020 | * @buflen: Response buffer length. | |
2021 | * | |
2022 | * Simulate READ CAPACITY commands. | |
2023 | * | |
2024 | * LOCKING: | |
2025 | * spin_lock_irqsave(host_set lock) | |
2026 | */ | |
2027 | ||
2028 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
2029 | unsigned int buflen) | |
2030 | { | |
2031 | u64 n_sectors; | |
2032 | u32 tmp; | |
2033 | ||
2034 | VPRINTK("ENTER\n"); | |
2035 | ||
8bf62ece AL |
2036 | if (ata_id_has_lba(args->id)) { |
2037 | if (ata_id_has_lba48(args->id)) | |
2038 | n_sectors = ata_id_u64(args->id, 100); | |
2039 | else | |
2040 | n_sectors = ata_id_u32(args->id, 60); | |
2041 | } else { | |
2042 | /* CHS default translation */ | |
2043 | n_sectors = args->id[1] * args->id[3] * args->id[6]; | |
2044 | ||
2045 | if (ata_id_current_chs_valid(args->id)) | |
2046 | /* CHS current translation */ | |
2047 | n_sectors = ata_id_u32(args->id, 57); | |
2048 | } | |
2049 | ||
1da177e4 LT |
2050 | n_sectors--; /* ATA TotalUserSectors - 1 */ |
2051 | ||
1da177e4 | 2052 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
0c144d0d PP |
2053 | if( n_sectors >= 0xffffffffULL ) |
2054 | tmp = 0xffffffff ; /* Return max count on overflow */ | |
2055 | else | |
2056 | tmp = n_sectors ; | |
2057 | ||
1da177e4 LT |
2058 | /* sector count, 32-bit */ |
2059 | rbuf[0] = tmp >> (8 * 3); | |
2060 | rbuf[1] = tmp >> (8 * 2); | |
2061 | rbuf[2] = tmp >> (8 * 1); | |
2062 | rbuf[3] = tmp; | |
2063 | ||
2064 | /* sector size */ | |
2065 | tmp = ATA_SECT_SIZE; | |
2066 | rbuf[6] = tmp >> 8; | |
2067 | rbuf[7] = tmp; | |
2068 | ||
2069 | } else { | |
2070 | /* sector count, 64-bit */ | |
0c144d0d PP |
2071 | tmp = n_sectors >> (8 * 4); |
2072 | rbuf[2] = tmp >> (8 * 3); | |
2073 | rbuf[3] = tmp >> (8 * 2); | |
2074 | rbuf[4] = tmp >> (8 * 1); | |
2075 | rbuf[5] = tmp; | |
2076 | tmp = n_sectors; | |
1da177e4 LT |
2077 | rbuf[6] = tmp >> (8 * 3); |
2078 | rbuf[7] = tmp >> (8 * 2); | |
2079 | rbuf[8] = tmp >> (8 * 1); | |
2080 | rbuf[9] = tmp; | |
2081 | ||
2082 | /* sector size */ | |
2083 | tmp = ATA_SECT_SIZE; | |
2084 | rbuf[12] = tmp >> 8; | |
2085 | rbuf[13] = tmp; | |
2086 | } | |
2087 | ||
2088 | return 0; | |
2089 | } | |
2090 | ||
2091 | /** | |
2092 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2093 | * @args: device IDENTIFY data / SCSI command of interest. | |
2094 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2095 | * @buflen: Response buffer length. | |
2096 | * | |
2097 | * Simulate REPORT LUNS command. | |
2098 | * | |
2099 | * LOCKING: | |
2100 | * spin_lock_irqsave(host_set lock) | |
2101 | */ | |
2102 | ||
2103 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2104 | unsigned int buflen) | |
2105 | { | |
2106 | VPRINTK("ENTER\n"); | |
2107 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
845c5834 DG |
2112 | /** |
2113 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2114 | * @cmd: SCSI request to be handled | |
2115 | * @sk: SCSI-defined sense key | |
2116 | * @asc: SCSI-defined additional sense code | |
2117 | * @ascq: SCSI-defined additional sense code qualifier | |
2118 | * | |
2119 | * Helper function that builds a valid fixed format, current | |
2120 | * response code and the given sense key (sk), additional sense | |
2121 | * code (asc) and additional sense code qualifier (ascq) with | |
2122 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2123 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2124 | * | |
2125 | * LOCKING: | |
2126 | * Not required | |
2127 | */ | |
2128 | ||
2129 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2130 | { | |
2131 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2132 | ||
2133 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2134 | cmd->sense_buffer[2] = sk; | |
2135 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2136 | cmd->sense_buffer[12] = asc; | |
2137 | cmd->sense_buffer[13] = ascq; | |
2138 | } | |
2139 | ||
1da177e4 LT |
2140 | /** |
2141 | * ata_scsi_badcmd - End a SCSI request with an error | |
2142 | * @cmd: SCSI request to be handled | |
2143 | * @done: SCSI command completion function | |
2144 | * @asc: SCSI-defined additional sense code | |
2145 | * @ascq: SCSI-defined additional sense code qualifier | |
2146 | * | |
2147 | * Helper function that completes a SCSI command with | |
2148 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2149 | * and the specified additional sense codes. | |
2150 | * | |
2151 | * LOCKING: | |
2152 | * spin_lock_irqsave(host_set lock) | |
2153 | */ | |
2154 | ||
2155 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2156 | { | |
2157 | DPRINTK("ENTER\n"); | |
ae006510 | 2158 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2159 | |
2160 | done(cmd); | |
2161 | } | |
2162 | ||
77853bf2 | 2163 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2164 | { |
74e6c8c3 | 2165 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2166 | /* FIXME: not quite right; we don't want the |
2167 | * translation of taskfile registers into | |
2168 | * a sense descriptors, since that's only | |
2169 | * correct for ATA, not ATAPI | |
2170 | */ | |
2171 | ata_gen_ata_desc_sense(qc); | |
74e6c8c3 | 2172 | } |
a939c963 | 2173 | |
c6e6e666 | 2174 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2175 | ata_qc_free(qc); |
c6e6e666 | 2176 | } |
a939c963 | 2177 | |
c6e6e666 JG |
2178 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2179 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2180 | { | |
2181 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2182 | } | |
2183 | ||
2184 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2185 | { | |
2186 | struct ata_port *ap = qc->ap; | |
2187 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2188 | ||
2189 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2190 | |
2191 | /* FIXME: is this needed? */ | |
2192 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2193 | ||
c6e6e666 JG |
2194 | ap->ops->tf_read(ap, &qc->tf); |
2195 | ||
2196 | /* fill these in, for the case where they are -not- overwritten */ | |
2197 | cmd->sense_buffer[0] = 0x70; | |
2198 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2199 | ||
2200 | ata_qc_reinit(qc); | |
2201 | ||
a939c963 JG |
2202 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
2203 | qc->dma_dir = DMA_FROM_DEVICE; | |
2204 | ||
6e7846e9 | 2205 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2206 | qc->cdb[0] = REQUEST_SENSE; |
2207 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2208 | ||
2209 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2210 | qc->tf.command = ATA_CMD_PACKET; | |
2211 | ||
c6e6e666 JG |
2212 | if (ata_pio_use_silly(ap)) { |
2213 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2214 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2215 | } else { | |
2216 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2217 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2218 | qc->tf.lbah = (8 * 1024) >> 8; | |
2219 | } | |
a939c963 JG |
2220 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2221 | ||
c6e6e666 | 2222 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2223 | |
8e0e694a | 2224 | ata_qc_issue(qc); |
a939c963 JG |
2225 | |
2226 | DPRINTK("EXIT\n"); | |
2227 | } | |
2228 | ||
77853bf2 | 2229 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2230 | { |
2231 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2232 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2233 | |
a7dac447 | 2234 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2235 | |
246619da TH |
2236 | /* handle completion from new EH */ |
2237 | if (unlikely(qc->ap->ops->error_handler && | |
2238 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2239 | ||
2240 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2241 | /* FIXME: not quite right; we don't want the | |
2242 | * translation of taskfile registers into a | |
2243 | * sense descriptors, since that's only | |
2244 | * correct for ATA, not ATAPI | |
2245 | */ | |
2246 | ata_gen_ata_desc_sense(qc); | |
2247 | } | |
2248 | ||
2249 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; | |
2250 | qc->scsidone(cmd); | |
2251 | ata_qc_free(qc); | |
2252 | return; | |
2253 | } | |
2254 | ||
2255 | /* successful completion or old EH failure path */ | |
a7dac447 | 2256 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2257 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2258 | atapi_request_sense(qc); |
77853bf2 | 2259 | return; |
74e6c8c3 | 2260 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2261 | /* FIXME: not quite right; we don't want the |
2262 | * translation of taskfile registers into | |
2263 | * a sense descriptors, since that's only | |
2264 | * correct for ATA, not ATAPI | |
2265 | */ | |
2266 | ata_gen_ata_desc_sense(qc); | |
74e6c8c3 | 2267 | } else { |
1da177e4 LT |
2268 | u8 *scsicmd = cmd->cmnd; |
2269 | ||
fd71da46 | 2270 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2271 | u8 *buf = NULL; |
2272 | unsigned int buflen; | |
2273 | ||
2274 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2275 | |
2276 | /* ATAPI devices typically report zero for their SCSI version, | |
2277 | * and sometimes deviate from the spec WRT response data | |
2278 | * format. If SCSI version is reported as zero like normal, | |
2279 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2280 | * to indicate to the Linux scsi midlayer this is a modern | |
2281 | * device. 2) Ensure response data format / ATAPI information | |
2282 | * are always correct. | |
a15dbeb4 JG |
2283 | */ |
2284 | if (buf[2] == 0) { | |
2285 | buf[2] = 0x5; | |
2286 | buf[3] = 0x32; | |
2287 | } | |
2288 | ||
1da177e4 LT |
2289 | ata_scsi_rbuf_put(cmd, buf); |
2290 | } | |
a15dbeb4 | 2291 | |
1da177e4 LT |
2292 | cmd->result = SAM_STAT_GOOD; |
2293 | } | |
2294 | ||
2295 | qc->scsidone(cmd); | |
77853bf2 | 2296 | ata_qc_free(qc); |
1da177e4 LT |
2297 | } |
2298 | /** | |
2299 | * atapi_xlat - Initialize PACKET taskfile | |
2300 | * @qc: command structure to be initialized | |
2301 | * @scsicmd: SCSI CDB associated with this PACKET command | |
2302 | * | |
2303 | * LOCKING: | |
2304 | * spin_lock_irqsave(host_set lock) | |
2305 | * | |
2306 | * RETURNS: | |
2307 | * Zero on success, non-zero on failure. | |
2308 | */ | |
2309 | ||
057ace5e | 2310 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
2311 | { |
2312 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2313 | struct ata_device *dev = qc->dev; | |
2314 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
be7db055 | 2315 | int nodata = (cmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
2316 | |
2317 | if (!using_pio) | |
2318 | /* Check whether ATAPI DMA is safe */ | |
2319 | if (ata_check_atapi_dma(qc)) | |
2320 | using_pio = 1; | |
2321 | ||
6e7846e9 | 2322 | memcpy(&qc->cdb, scsicmd, dev->cdb_len); |
1da177e4 LT |
2323 | |
2324 | qc->complete_fn = atapi_qc_complete; | |
2325 | ||
2326 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
be7db055 | 2327 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2328 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2329 | DPRINTK("direction: write\n"); | |
2330 | } | |
2331 | ||
2332 | qc->tf.command = ATA_CMD_PACKET; | |
2333 | ||
2334 | /* no data, or PIO data xfer */ | |
2335 | if (using_pio || nodata) { | |
2336 | if (nodata) | |
2337 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2338 | else | |
2339 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2340 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2341 | qc->tf.lbah = (8 * 1024) >> 8; | |
2342 | } | |
2343 | ||
2344 | /* DMA data xfer */ | |
2345 | else { | |
2346 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2347 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2348 | ||
95de719a AL |
2349 | if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE)) |
2350 | /* some SATA bridges need us to indicate data xfer direction */ | |
1da177e4 | 2351 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2352 | } |
2353 | ||
5d5ff44f | 2354 | qc->nbytes = cmd->request_bufflen; |
1da177e4 LT |
2355 | |
2356 | return 0; | |
2357 | } | |
2358 | ||
ab5b3a5b TH |
2359 | static struct ata_device * ata_find_dev(struct ata_port *ap, int id) |
2360 | { | |
2361 | if (likely(id < ATA_MAX_DEVICES)) | |
2362 | return &ap->device[id]; | |
2363 | return NULL; | |
2364 | } | |
2365 | ||
2366 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
2367 | const struct scsi_device *scsidev) | |
2368 | { | |
2369 | /* skip commands not addressed to targets we simulate */ | |
2370 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2371 | return NULL; | |
2372 | ||
2373 | return ata_find_dev(ap, scsidev->id); | |
2374 | } | |
2375 | ||
99ba9e09 BK |
2376 | /** |
2377 | * ata_scsi_dev_enabled - determine if device is enabled | |
2378 | * @dev: ATA device | |
2379 | * | |
2380 | * Determine if commands should be sent to the specified device. | |
2381 | * | |
2382 | * LOCKING: | |
2383 | * spin_lock_irqsave(host_set lock) | |
2384 | * | |
2385 | * RETURNS: | |
2386 | * 0 if commands are not allowed / 1 if commands are allowed | |
2387 | */ | |
2388 | ||
2389 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2390 | { | |
2391 | if (unlikely(!ata_dev_enabled(dev))) | |
2392 | return 0; | |
2393 | ||
2394 | if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { | |
2395 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { | |
2396 | ata_dev_printk(dev, KERN_WARNING, | |
2397 | "WARNING: ATAPI is %s, device ignored.\n", | |
2398 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2399 | return 0; | |
2400 | } | |
2401 | } | |
2402 | ||
2403 | return 1; | |
2404 | } | |
2405 | ||
1da177e4 LT |
2406 | /** |
2407 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2408 | * @ap: ATA port to which the device is attached | |
2409 | * @scsidev: SCSI device from which we derive the ATA device | |
2410 | * | |
2411 | * Given various information provided in struct scsi_cmnd, | |
2412 | * map that onto an ATA bus, and using that mapping | |
2413 | * determine which ata_device is associated with the | |
2414 | * SCSI command to be sent. | |
2415 | * | |
2416 | * LOCKING: | |
2417 | * spin_lock_irqsave(host_set lock) | |
2418 | * | |
2419 | * RETURNS: | |
2420 | * Associated ATA device, or %NULL if not found. | |
2421 | */ | |
1da177e4 | 2422 | static struct ata_device * |
057ace5e | 2423 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2424 | { |
ab5b3a5b | 2425 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2426 | |
99ba9e09 | 2427 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2428 | return NULL; |
2429 | ||
1da177e4 LT |
2430 | return dev; |
2431 | } | |
2432 | ||
b095518e JG |
2433 | /* |
2434 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2435 | * @byte1: Byte 1 from pass-thru CDB. | |
2436 | * | |
2437 | * RETURNS: | |
2438 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2439 | */ | |
2440 | static u8 | |
2441 | ata_scsi_map_proto(u8 byte1) | |
2442 | { | |
2443 | switch((byte1 & 0x1e) >> 1) { | |
2444 | case 3: /* Non-data */ | |
2445 | return ATA_PROT_NODATA; | |
2446 | ||
2447 | case 6: /* DMA */ | |
2448 | return ATA_PROT_DMA; | |
2449 | ||
2450 | case 4: /* PIO Data-in */ | |
2451 | case 5: /* PIO Data-out */ | |
b095518e JG |
2452 | return ATA_PROT_PIO; |
2453 | ||
2454 | case 10: /* Device Reset */ | |
2455 | case 0: /* Hard Reset */ | |
2456 | case 1: /* SRST */ | |
2457 | case 2: /* Bus Idle */ | |
2458 | case 7: /* Packet */ | |
2459 | case 8: /* DMA Queued */ | |
2460 | case 9: /* Device Diagnostic */ | |
2461 | case 11: /* UDMA Data-in */ | |
2462 | case 12: /* UDMA Data-Out */ | |
2463 | case 13: /* FPDMA */ | |
2464 | default: /* Reserved */ | |
2465 | break; | |
2466 | } | |
2467 | ||
2468 | return ATA_PROT_UNKNOWN; | |
2469 | } | |
2470 | ||
2471 | /** | |
2472 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2473 | * @qc: command structure to be initialized | |
8e8b77dd | 2474 | * @scsicmd: SCSI command to convert |
b095518e JG |
2475 | * |
2476 | * Handles either 12 or 16-byte versions of the CDB. | |
2477 | * | |
2478 | * RETURNS: | |
2479 | * Zero on success, non-zero on failure. | |
2480 | */ | |
2481 | static unsigned int | |
00ac37f5 | 2482 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd) |
b095518e JG |
2483 | { |
2484 | struct ata_taskfile *tf = &(qc->tf); | |
2485 | struct scsi_cmnd *cmd = qc->scsicmd; | |
f79d409f | 2486 | struct ata_device *dev = qc->dev; |
b095518e JG |
2487 | |
2488 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) | |
9a405257 | 2489 | goto invalid_fld; |
8190bdb9 | 2490 | |
f79d409f AC |
2491 | /* We may not issue DMA commands if no DMA mode is set */ |
2492 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2493 | goto invalid_fld; | |
b095518e | 2494 | |
f59b0cf8 AL |
2495 | if (scsicmd[1] & 0xe0) |
2496 | /* PIO multi not supported yet */ | |
2497 | goto invalid_fld; | |
2498 | ||
b095518e JG |
2499 | /* |
2500 | * 12 and 16 byte CDBs use different offsets to | |
2501 | * provide the various register values. | |
2502 | */ | |
2503 | if (scsicmd[0] == ATA_16) { | |
2504 | /* | |
2505 | * 16-byte CDB - may contain extended commands. | |
2506 | * | |
2507 | * If that is the case, copy the upper byte register values. | |
2508 | */ | |
2509 | if (scsicmd[1] & 0x01) { | |
2510 | tf->hob_feature = scsicmd[3]; | |
2511 | tf->hob_nsect = scsicmd[5]; | |
2512 | tf->hob_lbal = scsicmd[7]; | |
2513 | tf->hob_lbam = scsicmd[9]; | |
2514 | tf->hob_lbah = scsicmd[11]; | |
2515 | tf->flags |= ATA_TFLAG_LBA48; | |
2516 | } else | |
2517 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2518 | ||
2519 | /* | |
2520 | * Always copy low byte, device and command registers. | |
2521 | */ | |
2522 | tf->feature = scsicmd[4]; | |
2523 | tf->nsect = scsicmd[6]; | |
2524 | tf->lbal = scsicmd[8]; | |
2525 | tf->lbam = scsicmd[10]; | |
2526 | tf->lbah = scsicmd[12]; | |
2527 | tf->device = scsicmd[13]; | |
2528 | tf->command = scsicmd[14]; | |
2529 | } else { | |
2530 | /* | |
2531 | * 12-byte CDB - incapable of extended commands. | |
2532 | */ | |
2533 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2534 | ||
2535 | tf->feature = scsicmd[3]; | |
2536 | tf->nsect = scsicmd[4]; | |
2537 | tf->lbal = scsicmd[5]; | |
2538 | tf->lbam = scsicmd[6]; | |
2539 | tf->lbah = scsicmd[7]; | |
2540 | tf->device = scsicmd[8]; | |
2541 | tf->command = scsicmd[9]; | |
2542 | } | |
dcc2d1e7 ML |
2543 | /* |
2544 | * If slave is possible, enforce correct master/slave bit | |
2545 | */ | |
2546 | if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) | |
2547 | tf->device = qc->dev->devno ? | |
2548 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e JG |
2549 | |
2550 | /* | |
2551 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2552 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2553 | * by an update to hardware-specific registers for each | |
2554 | * controller (i.e. the reason for ->set_piomode(), | |
2555 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2556 | */ | |
2557 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2558 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2559 | goto invalid_fld; |
b095518e JG |
2560 | |
2561 | /* | |
2562 | * Set flags so that all registers will be written, | |
2563 | * and pass on write indication (used for PIO/DMA | |
2564 | * setup.) | |
2565 | */ | |
2566 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2567 | ||
0274aa25 | 2568 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2569 | tf->flags |= ATA_TFLAG_WRITE; |
2570 | ||
2571 | /* | |
2572 | * Set transfer length. | |
2573 | * | |
2574 | * TODO: find out if we need to do more here to | |
2575 | * cover scatter/gather case. | |
2576 | */ | |
5d5ff44f | 2577 | qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE; |
b095518e | 2578 | |
e61e0672 TH |
2579 | /* request result TF */ |
2580 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2581 | ||
b095518e | 2582 | return 0; |
9a405257 TH |
2583 | |
2584 | invalid_fld: | |
2585 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00); | |
2586 | /* "Invalid field in cdb" */ | |
2587 | return 1; | |
b095518e JG |
2588 | } |
2589 | ||
1da177e4 LT |
2590 | /** |
2591 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2592 | * @dev: ATA device | |
2593 | * @cmd: SCSI command opcode to consider | |
2594 | * | |
2595 | * Look up the SCSI command given, and determine whether the | |
2596 | * SCSI command is to be translated or simulated. | |
2597 | * | |
2598 | * RETURNS: | |
2599 | * Pointer to translation function if possible, %NULL if not. | |
2600 | */ | |
2601 | ||
2602 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2603 | { | |
2604 | switch (cmd) { | |
2605 | case READ_6: | |
2606 | case READ_10: | |
2607 | case READ_16: | |
2608 | ||
2609 | case WRITE_6: | |
2610 | case WRITE_10: | |
2611 | case WRITE_16: | |
2612 | return ata_scsi_rw_xlat; | |
2613 | ||
2614 | case SYNCHRONIZE_CACHE: | |
2615 | if (ata_try_flush_cache(dev)) | |
2616 | return ata_scsi_flush_xlat; | |
2617 | break; | |
2618 | ||
2619 | case VERIFY: | |
2620 | case VERIFY_16: | |
2621 | return ata_scsi_verify_xlat; | |
b095518e JG |
2622 | |
2623 | case ATA_12: | |
2624 | case ATA_16: | |
2625 | return ata_scsi_pass_thru; | |
da61396d | 2626 | |
972dcafb DG |
2627 | case START_STOP: |
2628 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2629 | } |
2630 | ||
2631 | return NULL; | |
2632 | } | |
2633 | ||
2634 | /** | |
2635 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2636 | * @ap: ATA port to which the command was being sent | |
2637 | * @cmd: SCSI command to dump | |
2638 | * | |
2639 | * Prints the contents of a SCSI command via printk(). | |
2640 | */ | |
2641 | ||
2642 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2643 | struct scsi_cmnd *cmd) | |
2644 | { | |
2645 | #ifdef ATA_DEBUG | |
2646 | struct scsi_device *scsidev = cmd->device; | |
2647 | u8 *scsicmd = cmd->cmnd; | |
2648 | ||
2649 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2650 | ap->id, | |
2651 | scsidev->channel, scsidev->id, scsidev->lun, | |
2652 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2653 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2654 | scsicmd[8]); | |
2655 | #endif | |
2656 | } | |
2657 | ||
2115ea94 TH |
2658 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd, |
2659 | void (*done)(struct scsi_cmnd *), | |
2660 | struct ata_device *dev) | |
eb3f0f9c | 2661 | { |
2115ea94 TH |
2662 | int rc = 0; |
2663 | ||
eb3f0f9c BK |
2664 | if (dev->class == ATA_DEV_ATA) { |
2665 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
2666 | cmd->cmnd[0]); | |
2667 | ||
2668 | if (xlat_func) | |
2115ea94 | 2669 | rc = ata_scsi_translate(dev, cmd, done, xlat_func); |
eb3f0f9c | 2670 | else |
3373efd8 | 2671 | ata_scsi_simulate(dev, cmd, done); |
eb3f0f9c | 2672 | } else |
2115ea94 TH |
2673 | rc = ata_scsi_translate(dev, cmd, done, atapi_xlat); |
2674 | ||
2675 | return rc; | |
eb3f0f9c BK |
2676 | } |
2677 | ||
1da177e4 LT |
2678 | /** |
2679 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2680 | * @cmd: SCSI command to be sent | |
2681 | * @done: Completion function, called when command is complete | |
2682 | * | |
2683 | * In some cases, this function translates SCSI commands into | |
2684 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2685 | * hardware. In other cases, this function simulates a | |
2686 | * SCSI device by evaluating and responding to certain | |
2687 | * SCSI commands. This creates the overall effect of | |
2688 | * ATA and ATAPI devices appearing as SCSI devices. | |
2689 | * | |
2690 | * LOCKING: | |
2691 | * Releases scsi-layer-held lock, and obtains host_set lock. | |
2692 | * | |
2693 | * RETURNS: | |
2115ea94 TH |
2694 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
2695 | * 0 otherwise. | |
1da177e4 | 2696 | */ |
1da177e4 LT |
2697 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
2698 | { | |
2699 | struct ata_port *ap; | |
2700 | struct ata_device *dev; | |
2701 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 2702 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 2703 | int rc = 0; |
1da177e4 | 2704 | |
35bb94b1 | 2705 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
2706 | |
2707 | spin_unlock(shost->host_lock); | |
ba6a1308 | 2708 | spin_lock(ap->lock); |
1da177e4 LT |
2709 | |
2710 | ata_scsi_dump_cdb(ap, cmd); | |
2711 | ||
2712 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 2713 | if (likely(dev)) |
2115ea94 | 2714 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 2715 | else { |
1da177e4 LT |
2716 | cmd->result = (DID_BAD_TARGET << 16); |
2717 | done(cmd); | |
1da177e4 LT |
2718 | } |
2719 | ||
ba6a1308 | 2720 | spin_unlock(ap->lock); |
005a5a06 | 2721 | spin_lock(shost->host_lock); |
2115ea94 | 2722 | return rc; |
1da177e4 LT |
2723 | } |
2724 | ||
2725 | /** | |
2726 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 2727 | * @dev: the target device |
1da177e4 LT |
2728 | * @cmd: SCSI command being sent to device. |
2729 | * @done: SCSI command completion function. | |
2730 | * | |
2731 | * Interprets and directly executes a select list of SCSI commands | |
2732 | * that can be handled internally. | |
2733 | * | |
2734 | * LOCKING: | |
2735 | * spin_lock_irqsave(host_set lock) | |
2736 | */ | |
2737 | ||
3373efd8 | 2738 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
2739 | void (*done)(struct scsi_cmnd *)) |
2740 | { | |
2741 | struct ata_scsi_args args; | |
057ace5e | 2742 | const u8 *scsicmd = cmd->cmnd; |
1da177e4 | 2743 | |
9a3dccc4 TH |
2744 | args.dev = dev; |
2745 | args.id = dev->id; | |
1da177e4 LT |
2746 | args.cmd = cmd; |
2747 | args.done = done; | |
2748 | ||
2749 | switch(scsicmd[0]) { | |
2750 | /* no-op's, complete with success */ | |
2751 | case SYNCHRONIZE_CACHE: | |
2752 | case REZERO_UNIT: | |
2753 | case SEEK_6: | |
2754 | case SEEK_10: | |
2755 | case TEST_UNIT_READY: | |
2756 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2757 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2758 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2759 | break; | |
2760 | ||
2761 | case INQUIRY: | |
2762 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 2763 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2764 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2765 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2766 | else if (scsicmd[2] == 0x00) | |
2767 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2768 | else if (scsicmd[2] == 0x80) | |
2769 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2770 | else if (scsicmd[2] == 0x83) | |
2771 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2772 | else | |
ae006510 | 2773 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2774 | break; |
2775 | ||
2776 | case MODE_SENSE: | |
2777 | case MODE_SENSE_10: | |
2778 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2779 | break; | |
2780 | ||
2781 | case MODE_SELECT: /* unconditionally return */ | |
2782 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 2783 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2784 | break; |
2785 | ||
2786 | case READ_CAPACITY: | |
2787 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2788 | break; | |
2789 | ||
2790 | case SERVICE_ACTION_IN: | |
2791 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2792 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2793 | else | |
ae006510 | 2794 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2795 | break; |
2796 | ||
2797 | case REPORT_LUNS: | |
2798 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2799 | break; | |
2800 | ||
b095518e | 2801 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2802 | case REQUEST_SENSE: |
2803 | ||
2804 | /* all other commands */ | |
2805 | default: | |
ae006510 DG |
2806 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
2807 | /* "Invalid command operation code" */ | |
2808 | done(cmd); | |
1da177e4 LT |
2809 | break; |
2810 | } | |
2811 | } | |
2812 | ||
644dd0cc JG |
2813 | void ata_scsi_scan_host(struct ata_port *ap) |
2814 | { | |
2815 | unsigned int i; | |
2816 | ||
198e0fed | 2817 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
2818 | return; |
2819 | ||
3f19ee8c | 2820 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
3edebac4 TH |
2821 | struct ata_device *dev = &ap->device[i]; |
2822 | struct scsi_device *sdev; | |
2823 | ||
2824 | if (!ata_dev_enabled(dev) || dev->sdev) | |
2825 | continue; | |
3f19ee8c | 2826 | |
3edebac4 TH |
2827 | sdev = __scsi_add_device(ap->host, 0, i, 0, NULL); |
2828 | if (!IS_ERR(sdev)) { | |
2829 | dev->sdev = sdev; | |
2830 | scsi_device_put(sdev); | |
2831 | } | |
3f19ee8c | 2832 | } |
644dd0cc | 2833 | } |
0ea035a3 TH |
2834 | |
2835 | /** | |
2836 | * ata_scsi_offline_dev - offline attached SCSI device | |
2837 | * @dev: ATA device to offline attached SCSI device for | |
2838 | * | |
2839 | * This function is called from ata_eh_hotplug() and responsible | |
2840 | * for taking the SCSI device attached to @dev offline. This | |
2841 | * function is called with host_set lock which protects dev->sdev | |
2842 | * against clearing. | |
2843 | * | |
2844 | * LOCKING: | |
2845 | * spin_lock_irqsave(host_set lock) | |
2846 | * | |
2847 | * RETURNS: | |
2848 | * 1 if attached SCSI device exists, 0 otherwise. | |
2849 | */ | |
2850 | int ata_scsi_offline_dev(struct ata_device *dev) | |
2851 | { | |
2852 | if (dev->sdev) { | |
2853 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
2854 | return 1; | |
2855 | } | |
2856 | return 0; | |
2857 | } | |
580b2102 TH |
2858 | |
2859 | /** | |
2860 | * ata_scsi_remove_dev - remove attached SCSI device | |
2861 | * @dev: ATA device to remove attached SCSI device for | |
2862 | * | |
2863 | * This function is called from ata_eh_scsi_hotplug() and | |
2864 | * responsible for removing the SCSI device attached to @dev. | |
2865 | * | |
2866 | * LOCKING: | |
2867 | * Kernel thread context (may sleep). | |
2868 | */ | |
2869 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
2870 | { | |
2871 | struct ata_port *ap = dev->ap; | |
2872 | struct scsi_device *sdev; | |
2873 | unsigned long flags; | |
2874 | ||
2875 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
2876 | * state doesn't change underneath us and thus | |
2877 | * scsi_device_get() always succeeds. The mutex locking can | |
2878 | * be removed if there is __scsi_device_get() interface which | |
2879 | * increments reference counts regardless of device state. | |
2880 | */ | |
2881 | mutex_lock(&ap->host->scan_mutex); | |
ba6a1308 | 2882 | spin_lock_irqsave(ap->lock, flags); |
580b2102 TH |
2883 | |
2884 | /* clearing dev->sdev is protected by host_set lock */ | |
2885 | sdev = dev->sdev; | |
2886 | dev->sdev = NULL; | |
2887 | ||
2888 | if (sdev) { | |
2889 | /* If user initiated unplug races with us, sdev can go | |
2890 | * away underneath us after the host_set lock and | |
2891 | * scan_mutex are released. Hold onto it. | |
2892 | */ | |
2893 | if (scsi_device_get(sdev) == 0) { | |
2894 | /* The following ensures the attached sdev is | |
2895 | * offline on return from ata_scsi_offline_dev() | |
2896 | * regardless it wins or loses the race | |
2897 | * against this function. | |
2898 | */ | |
2899 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
2900 | } else { | |
2901 | WARN_ON(1); | |
2902 | sdev = NULL; | |
2903 | } | |
2904 | } | |
2905 | ||
ba6a1308 | 2906 | spin_unlock_irqrestore(ap->lock, flags); |
580b2102 TH |
2907 | mutex_unlock(&ap->host->scan_mutex); |
2908 | ||
2909 | if (sdev) { | |
2910 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
2911 | sdev->sdev_gendev.bus_id); | |
2912 | ||
2913 | scsi_remove_device(sdev); | |
2914 | scsi_device_put(sdev); | |
2915 | } | |
2916 | } | |
2917 | ||
2918 | /** | |
2919 | * ata_scsi_hotplug - SCSI part of hotplug | |
2920 | * @data: Pointer to ATA port to perform SCSI hotplug on | |
2921 | * | |
2922 | * Perform SCSI part of hotplug. It's executed from a separate | |
2923 | * workqueue after EH completes. This is necessary because SCSI | |
2924 | * hot plugging requires working EH and hot unplugging is | |
2925 | * synchronized with hot plugging with a mutex. | |
2926 | * | |
2927 | * LOCKING: | |
2928 | * Kernel thread context (may sleep). | |
2929 | */ | |
2930 | void ata_scsi_hotplug(void *data) | |
2931 | { | |
2932 | struct ata_port *ap = data; | |
2933 | int i; | |
2934 | ||
2935 | if (ap->flags & ATA_FLAG_UNLOADING) { | |
2936 | DPRINTK("ENTER/EXIT - unloading\n"); | |
2937 | return; | |
2938 | } | |
2939 | ||
2940 | DPRINTK("ENTER\n"); | |
2941 | ||
2942 | /* unplug detached devices */ | |
2943 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
2944 | struct ata_device *dev = &ap->device[i]; | |
2945 | unsigned long flags; | |
2946 | ||
2947 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
2948 | continue; | |
2949 | ||
ba6a1308 | 2950 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 2951 | dev->flags &= ~ATA_DFLAG_DETACHED; |
ba6a1308 | 2952 | spin_unlock_irqrestore(ap->lock, flags); |
580b2102 TH |
2953 | |
2954 | ata_scsi_remove_dev(dev); | |
2955 | } | |
2956 | ||
2957 | /* scan for new ones */ | |
2958 | ata_scsi_scan_host(ap); | |
2959 | ||
2960 | /* If we scanned while EH was in progress, scan would have | |
2961 | * failed silently. Requeue if there are enabled but | |
2962 | * unattached devices. | |
2963 | */ | |
2964 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
2965 | struct ata_device *dev = &ap->device[i]; | |
2966 | if (ata_dev_enabled(dev) && !dev->sdev) { | |
2967 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ); | |
2968 | break; | |
2969 | } | |
2970 | } | |
2971 | ||
2972 | DPRINTK("EXIT\n"); | |
2973 | } | |
83c47bcb TH |
2974 | |
2975 | /** | |
2976 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
2977 | * @shost: SCSI host to scan | |
2978 | * @channel: Channel to scan | |
2979 | * @id: ID to scan | |
2980 | * @lun: LUN to scan | |
2981 | * | |
2982 | * This function is called when user explicitly requests bus | |
2983 | * scan. Set probe pending flag and invoke EH. | |
2984 | * | |
2985 | * LOCKING: | |
2986 | * SCSI layer (we don't care) | |
2987 | * | |
2988 | * RETURNS: | |
2989 | * Zero. | |
2990 | */ | |
2991 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
2992 | unsigned int id, unsigned int lun) | |
2993 | { | |
2994 | struct ata_port *ap = ata_shost_to_port(shost); | |
2995 | unsigned long flags; | |
2996 | int rc = 0; | |
2997 | ||
2998 | if (!ap->ops->error_handler) | |
2999 | return -EOPNOTSUPP; | |
3000 | ||
3001 | if ((channel != SCAN_WILD_CARD && channel != 0) || | |
3002 | (lun != SCAN_WILD_CARD && lun != 0)) | |
3003 | return -EINVAL; | |
3004 | ||
ba6a1308 | 3005 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
3006 | |
3007 | if (id == SCAN_WILD_CARD) { | |
3008 | ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; | |
3009 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3010 | } else { | |
3011 | struct ata_device *dev = ata_find_dev(ap, id); | |
3012 | ||
3013 | if (dev) { | |
3014 | ap->eh_info.probe_mask |= 1 << dev->devno; | |
3015 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3016 | } else | |
3017 | rc = -EINVAL; | |
3018 | } | |
3019 | ||
3020 | if (rc == 0) | |
3021 | ata_port_schedule_eh(ap); | |
3022 | ||
ba6a1308 | 3023 | spin_unlock_irqrestore(ap->lock, flags); |
83c47bcb TH |
3024 | |
3025 | return rc; | |
3026 | } | |
3057ac3c | 3027 | |
3028 | /** | |
d0171269 TH |
3029 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
3030 | * @data: Pointer to ATA port to perform scsi_rescan_device() | |
3057ac3c | 3031 | * |
d0171269 TH |
3032 | * After ATA pass thru (SAT) commands are executed successfully, |
3033 | * libata need to propagate the changes to SCSI layer. This | |
3034 | * function must be executed from ata_aux_wq such that sdev | |
3035 | * attach/detach don't race with rescan. | |
3057ac3c | 3036 | * |
d0171269 TH |
3037 | * LOCKING: |
3038 | * Kernel thread context (may sleep). | |
3057ac3c | 3039 | */ |
3040 | void ata_scsi_dev_rescan(void *data) | |
3041 | { | |
3042 | struct ata_port *ap = data; | |
3043 | struct ata_device *dev; | |
3044 | unsigned int i; | |
3045 | ||
3046 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3047 | dev = &ap->device[i]; | |
3048 | ||
d0171269 | 3049 | if (ata_dev_enabled(dev) && dev->sdev) |
3057ac3c | 3050 | scsi_rescan_device(&(dev->sdev->sdev_gendev)); |
3051 | } | |
3052 | } |