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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
40 | #include "scsi.h" | |
41 | #include <scsi/scsi_host.h> | |
42 | #include <linux/libata.h> | |
b095518e | 43 | #include <linux/hdreg.h> |
1da177e4 LT |
44 | #include <asm/uaccess.h> |
45 | ||
46 | #include "libata.h" | |
47 | ||
b095518e JG |
48 | #define SECTOR_SIZE 512 |
49 | ||
1da177e4 LT |
50 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd); |
51 | static struct ata_device * | |
52 | ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev); | |
53 | ||
54 | ||
55 | /** | |
56 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
57 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
58 | * @bdev: block device associated with @sdev | |
59 | * @capacity: capacity of SCSI device | |
60 | * @geom: location to which geometry will be output | |
61 | * | |
62 | * Generic bios head/sector/cylinder calculator | |
63 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
64 | * mapping. Some situations may arise where the disk is not | |
65 | * bootable if this is not used. | |
66 | * | |
67 | * LOCKING: | |
68 | * Defined by the SCSI layer. We don't really care. | |
69 | * | |
70 | * RETURNS: | |
71 | * Zero. | |
72 | */ | |
73 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
74 | sector_t capacity, int geom[]) | |
75 | { | |
76 | geom[0] = 255; | |
77 | geom[1] = 63; | |
78 | sector_div(capacity, 255*63); | |
79 | geom[2] = capacity; | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
b095518e JG |
84 | /** |
85 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
86 | * @dev: Device to whom we are issuing command | |
87 | * @arg: User provided data for issuing command | |
88 | * | |
89 | * LOCKING: | |
90 | * Defined by the SCSI layer. We don't really care. | |
91 | * | |
92 | * RETURNS: | |
93 | * Zero on success, negative errno on error. | |
94 | */ | |
95 | ||
96 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) | |
97 | { | |
98 | int rc = 0; | |
99 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
100 | u8 args[4], *argbuf = NULL; | |
101 | int argsize = 0; | |
102 | struct scsi_request *sreq; | |
103 | ||
104 | if (NULL == (void *)arg) | |
105 | return -EINVAL; | |
106 | ||
107 | if (copy_from_user(args, arg, sizeof(args))) | |
108 | return -EFAULT; | |
109 | ||
110 | sreq = scsi_allocate_request(scsidev, GFP_KERNEL); | |
111 | if (!sreq) | |
112 | return -EINTR; | |
113 | ||
114 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
115 | ||
116 | if (args[3]) { | |
117 | argsize = SECTOR_SIZE * args[3]; | |
118 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
119 | if (argbuf == NULL) { |
120 | rc = -ENOMEM; | |
121 | goto error; | |
122 | } | |
b095518e JG |
123 | |
124 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
125 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
126 | block count in sector count field */ | |
127 | sreq->sr_data_direction = DMA_FROM_DEVICE; | |
128 | } else { | |
129 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
130 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
131 | sreq->sr_data_direction = DMA_NONE; | |
132 | } | |
133 | ||
134 | scsi_cmd[0] = ATA_16; | |
135 | ||
136 | scsi_cmd[4] = args[2]; | |
137 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
138 | scsi_cmd[6] = args[3]; | |
139 | scsi_cmd[8] = args[1]; | |
140 | scsi_cmd[10] = 0x4f; | |
141 | scsi_cmd[12] = 0xc2; | |
142 | } else { | |
143 | scsi_cmd[6] = args[1]; | |
144 | } | |
145 | scsi_cmd[14] = args[0]; | |
146 | ||
147 | /* Good values for timeout and retries? Values below | |
148 | from scsi_ioctl_send_command() for default case... */ | |
149 | scsi_wait_req(sreq, scsi_cmd, argbuf, argsize, (10*HZ), 5); | |
150 | ||
151 | if (sreq->sr_result) { | |
152 | rc = -EIO; | |
153 | goto error; | |
154 | } | |
155 | ||
156 | /* Need code to retrieve data from check condition? */ | |
157 | ||
158 | if ((argbuf) | |
159 | && copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize)) | |
160 | rc = -EFAULT; | |
161 | error: | |
162 | scsi_release_request(sreq); | |
163 | ||
164 | if (argbuf) | |
165 | kfree(argbuf); | |
166 | ||
167 | return rc; | |
168 | } | |
169 | ||
170 | /** | |
171 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
172 | * @dev: Device to whom we are issuing command | |
173 | * @arg: User provided data for issuing command | |
174 | * | |
175 | * LOCKING: | |
176 | * Defined by the SCSI layer. We don't really care. | |
177 | * | |
178 | * RETURNS: | |
179 | * Zero on success, negative errno on error. | |
180 | */ | |
181 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
182 | { | |
183 | int rc = 0; | |
184 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
185 | u8 args[7]; | |
186 | struct scsi_request *sreq; | |
187 | ||
188 | if (NULL == (void *)arg) | |
189 | return -EINVAL; | |
190 | ||
191 | if (copy_from_user(args, arg, sizeof(args))) | |
192 | return -EFAULT; | |
193 | ||
194 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
195 | scsi_cmd[0] = ATA_16; | |
196 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
197 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
198 | scsi_cmd[4] = args[1]; | |
199 | scsi_cmd[6] = args[2]; | |
200 | scsi_cmd[8] = args[3]; | |
201 | scsi_cmd[10] = args[4]; | |
202 | scsi_cmd[12] = args[5]; | |
203 | scsi_cmd[14] = args[0]; | |
204 | ||
205 | sreq = scsi_allocate_request(scsidev, GFP_KERNEL); | |
206 | if (!sreq) { | |
207 | rc = -EINTR; | |
208 | goto error; | |
209 | } | |
210 | ||
211 | sreq->sr_data_direction = DMA_NONE; | |
212 | /* Good values for timeout and retries? Values below | |
213 | from scsi_ioctl_send_command() for default case... */ | |
214 | scsi_wait_req(sreq, scsi_cmd, NULL, 0, (10*HZ), 5); | |
215 | ||
216 | if (sreq->sr_result) { | |
217 | rc = -EIO; | |
218 | goto error; | |
219 | } | |
220 | ||
221 | /* Need code to retrieve data from check condition? */ | |
222 | ||
223 | error: | |
224 | scsi_release_request(sreq); | |
225 | return rc; | |
226 | } | |
227 | ||
1da177e4 LT |
228 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
229 | { | |
230 | struct ata_port *ap; | |
231 | struct ata_device *dev; | |
232 | int val = -EINVAL, rc = -EINVAL; | |
233 | ||
234 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
235 | if (!ap) | |
236 | goto out; | |
237 | ||
238 | dev = ata_scsi_find_dev(ap, scsidev); | |
239 | if (!dev) { | |
240 | rc = -ENODEV; | |
241 | goto out; | |
242 | } | |
243 | ||
244 | switch (cmd) { | |
245 | case ATA_IOC_GET_IO32: | |
246 | val = 0; | |
247 | if (copy_to_user(arg, &val, 1)) | |
248 | return -EFAULT; | |
249 | return 0; | |
250 | ||
251 | case ATA_IOC_SET_IO32: | |
252 | val = (unsigned long) arg; | |
253 | if (val != 0) | |
254 | return -EINVAL; | |
255 | return 0; | |
256 | ||
b095518e JG |
257 | case HDIO_DRIVE_CMD: |
258 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
259 | return -EACCES; | |
260 | return ata_cmd_ioctl(scsidev, arg); | |
261 | ||
262 | case HDIO_DRIVE_TASK: | |
263 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
264 | return -EACCES; | |
265 | return ata_task_ioctl(scsidev, arg); | |
266 | ||
1da177e4 LT |
267 | default: |
268 | rc = -ENOTTY; | |
269 | break; | |
270 | } | |
271 | ||
272 | out: | |
273 | return rc; | |
274 | } | |
275 | ||
276 | /** | |
277 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
278 | * @ap: ATA port to which the new command is attached | |
279 | * @dev: ATA device to which the new command is attached | |
280 | * @cmd: SCSI command that originated this ATA command | |
281 | * @done: SCSI command completion function | |
282 | * | |
283 | * Obtain a reference to an unused ata_queued_cmd structure, | |
284 | * which is the basic libata structure representing a single | |
285 | * ATA command sent to the hardware. | |
286 | * | |
287 | * If a command was available, fill in the SCSI-specific | |
288 | * portions of the structure with information on the | |
289 | * current command. | |
290 | * | |
291 | * LOCKING: | |
292 | * spin_lock_irqsave(host_set lock) | |
293 | * | |
294 | * RETURNS: | |
295 | * Command allocated, or %NULL if none available. | |
296 | */ | |
297 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap, | |
298 | struct ata_device *dev, | |
299 | struct scsi_cmnd *cmd, | |
300 | void (*done)(struct scsi_cmnd *)) | |
301 | { | |
302 | struct ata_queued_cmd *qc; | |
303 | ||
304 | qc = ata_qc_new_init(ap, dev); | |
305 | if (qc) { | |
306 | qc->scsicmd = cmd; | |
307 | qc->scsidone = done; | |
308 | ||
309 | if (cmd->use_sg) { | |
310 | qc->sg = (struct scatterlist *) cmd->request_buffer; | |
311 | qc->n_elem = cmd->use_sg; | |
312 | } else { | |
313 | qc->sg = &qc->sgent; | |
314 | qc->n_elem = 1; | |
315 | } | |
316 | } else { | |
317 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
318 | done(cmd); | |
319 | } | |
320 | ||
321 | return qc; | |
322 | } | |
323 | ||
b095518e JG |
324 | /** |
325 | * ata_dump_status - user friendly display of error info | |
326 | * @id: id of the port in question | |
327 | * @tf: ptr to filled out taskfile | |
328 | * | |
329 | * Decode and dump the ATA error/status registers for the user so | |
330 | * that they have some idea what really happened at the non | |
331 | * make-believe layer. | |
332 | * | |
333 | * LOCKING: | |
334 | * inherited from caller | |
335 | */ | |
336 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
337 | { | |
338 | u8 stat = tf->command, err = tf->feature; | |
339 | ||
340 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
341 | if (stat & ATA_BUSY) { | |
342 | printk("Busy }\n"); /* Data is not valid in this case */ | |
343 | } else { | |
344 | if (stat & 0x40) printk("DriveReady "); | |
345 | if (stat & 0x20) printk("DeviceFault "); | |
346 | if (stat & 0x10) printk("SeekComplete "); | |
347 | if (stat & 0x08) printk("DataRequest "); | |
348 | if (stat & 0x04) printk("CorrectedError "); | |
349 | if (stat & 0x02) printk("Index "); | |
350 | if (stat & 0x01) printk("Error "); | |
351 | printk("}\n"); | |
352 | ||
353 | if (err) { | |
354 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
355 | if (err & 0x04) printk("DriveStatusError "); | |
356 | if (err & 0x80) { | |
357 | if (err & 0x04) printk("BadCRC "); | |
358 | else printk("Sector "); | |
359 | } | |
360 | if (err & 0x40) printk("UncorrectableError "); | |
361 | if (err & 0x10) printk("SectorIdNotFound "); | |
362 | if (err & 0x02) printk("TrackZeroNotFound "); | |
363 | if (err & 0x01) printk("AddrMarkNotFound "); | |
364 | printk("}\n"); | |
365 | } | |
366 | } | |
367 | } | |
368 | ||
1da177e4 LT |
369 | /** |
370 | * ata_to_sense_error - convert ATA error to SCSI error | |
1da177e4 | 371 | * @drv_stat: value contained in ATA status register |
b095518e JG |
372 | * @drv_err: value contained in ATA error register |
373 | * @sk: the sense key we'll fill out | |
374 | * @asc: the additional sense code we'll fill out | |
375 | * @ascq: the additional sense code qualifier we'll fill out | |
1da177e4 | 376 | * |
b095518e JG |
377 | * Converts an ATA error into a SCSI error. Fill out pointers to |
378 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
379 | * format sense blocks. | |
1da177e4 LT |
380 | * |
381 | * LOCKING: | |
382 | * spin_lock_irqsave(host_set lock) | |
383 | */ | |
b095518e JG |
384 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
385 | u8 *ascq) | |
1da177e4 | 386 | { |
b095518e | 387 | int i; |
1da177e4 LT |
388 | /* Based on the 3ware driver translation table */ |
389 | static unsigned char sense_table[][4] = { | |
390 | /* BBD|ECC|ID|MAR */ | |
391 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
392 | /* BBD|ECC|ID */ | |
393 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
394 | /* ECC|MC|MARK */ | |
395 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
396 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
397 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
398 | /* MC|ID|ABRT|TRK0|MARK */ | |
399 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
400 | /* MCR|MARK */ | |
401 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
402 | /* Bad address mark */ | |
403 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
404 | /* TRK0 */ | |
405 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
406 | /* Abort & !ICRC */ | |
407 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
408 | /* Media change request */ | |
409 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
410 | /* SRV */ | |
411 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
412 | /* Media change */ | |
413 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
414 | /* ECC */ | |
415 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
416 | /* BBD - block marked bad */ | |
417 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
418 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
419 | }; | |
420 | static unsigned char stat_table[][4] = { | |
421 | /* Must be first because BUSY means no other bits valid */ | |
422 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
423 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
424 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
425 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
426 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
427 | }; | |
1da177e4 LT |
428 | |
429 | /* | |
430 | * Is this an error we can process/parse | |
431 | */ | |
b095518e JG |
432 | if (drv_stat & ATA_BUSY) { |
433 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 434 | } |
b095518e JG |
435 | |
436 | if (drv_err) { | |
437 | /* Look for drv_err */ | |
438 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
439 | /* Look for best matches first */ | |
440 | if ((sense_table[i][0] & drv_err) == | |
441 | sense_table[i][0]) { | |
442 | *sk = sense_table[i][1]; | |
443 | *asc = sense_table[i][2]; | |
444 | *ascq = sense_table[i][3]; | |
445 | goto translate_done; | |
446 | } | |
447 | } | |
448 | /* No immediate match */ | |
449 | printk(KERN_WARNING "ata%u: no sense translation for " | |
450 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 451 | } |
b095518e JG |
452 | |
453 | /* Fall back to interpreting status bits */ | |
454 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
455 | if (stat_table[i][0] & drv_stat) { | |
456 | *sk = stat_table[i][1]; | |
457 | *asc = stat_table[i][2]; | |
458 | *ascq = stat_table[i][3]; | |
459 | goto translate_done; | |
1da177e4 | 460 | } |
b095518e JG |
461 | } |
462 | /* No error? Undecoded? */ | |
463 | printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n", | |
464 | id, drv_stat); | |
465 | ||
466 | /* For our last chance pick, use medium read error because | |
467 | * it's much more common than an ATA drive telling you a write | |
468 | * has failed. | |
469 | */ | |
470 | *sk = MEDIUM_ERROR; | |
471 | *asc = 0x11; /* "unrecovered read error" */ | |
472 | *ascq = 0x04; /* "auto-reallocation failed" */ | |
473 | ||
474 | translate_done: | |
475 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to " | |
476 | "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err, | |
477 | *sk, *asc, *ascq); | |
478 | return; | |
479 | } | |
480 | ||
481 | /* | |
482 | * ata_gen_ata_desc_sense - Generate check condition sense block. | |
483 | * @qc: Command that completed. | |
484 | * | |
485 | * This function is specific to the ATA descriptor format sense | |
486 | * block specified for the ATA pass through commands. Regardless | |
487 | * of whether the command errored or not, return a sense | |
488 | * block. Copy all controller registers into the sense | |
489 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
490 | * | |
491 | * LOCKING: | |
492 | * spin_lock_irqsave(host_set lock) | |
493 | */ | |
494 | void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) | |
495 | { | |
496 | struct scsi_cmnd *cmd = qc->scsicmd; | |
497 | struct ata_taskfile *tf = &qc->tf; | |
498 | unsigned char *sb = cmd->sense_buffer; | |
499 | unsigned char *desc = sb + 8; | |
500 | ||
501 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
502 | ||
0e5dec47 | 503 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e JG |
504 | |
505 | /* | |
506 | * Read the controller registers. | |
507 | */ | |
508 | assert(NULL != qc->ap->ops->tf_read); | |
509 | qc->ap->ops->tf_read(qc->ap, tf); | |
1da177e4 | 510 | |
b095518e JG |
511 | /* |
512 | * Use ata_to_sense_error() to map status register bits | |
513 | * onto sense key, asc & ascq. | |
514 | */ | |
515 | if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) { | |
516 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, | |
517 | &sb[1], &sb[2], &sb[3]); | |
518 | sb[1] &= 0x0f; | |
1da177e4 LT |
519 | } |
520 | ||
b095518e JG |
521 | /* |
522 | * Sense data is current and format is descriptor. | |
523 | */ | |
524 | sb[0] = 0x72; | |
1da177e4 | 525 | |
b095518e JG |
526 | desc[0] = 0x09; |
527 | ||
528 | /* | |
529 | * Set length of additional sense data. | |
530 | * Since we only populate descriptor 0, the total | |
531 | * length is the same (fixed) length as descriptor 0. | |
532 | */ | |
533 | desc[1] = sb[7] = 14; | |
534 | ||
535 | /* | |
536 | * Copy registers into sense buffer. | |
537 | */ | |
538 | desc[2] = 0x00; | |
539 | desc[3] = tf->feature; /* == error reg */ | |
540 | desc[5] = tf->nsect; | |
541 | desc[7] = tf->lbal; | |
542 | desc[9] = tf->lbam; | |
543 | desc[11] = tf->lbah; | |
544 | desc[12] = tf->device; | |
545 | desc[13] = tf->command; /* == status reg */ | |
546 | ||
547 | /* | |
548 | * Fill in Extend bit, and the high order bytes | |
549 | * if applicable. | |
550 | */ | |
551 | if (tf->flags & ATA_TFLAG_LBA48) { | |
552 | desc[2] |= 0x01; | |
553 | desc[4] = tf->hob_nsect; | |
554 | desc[6] = tf->hob_lbal; | |
555 | desc[8] = tf->hob_lbam; | |
556 | desc[10] = tf->hob_lbah; | |
1da177e4 | 557 | } |
b095518e | 558 | } |
1da177e4 | 559 | |
b095518e JG |
560 | /** |
561 | * ata_gen_fixed_sense - generate a SCSI fixed sense block | |
562 | * @qc: Command that we are erroring out | |
563 | * | |
564 | * Leverage ata_to_sense_error() to give us the codes. Fit our | |
565 | * LBA in here if there's room. | |
566 | * | |
567 | * LOCKING: | |
568 | * inherited from caller | |
569 | */ | |
570 | void ata_gen_fixed_sense(struct ata_queued_cmd *qc) | |
571 | { | |
572 | struct scsi_cmnd *cmd = qc->scsicmd; | |
573 | struct ata_taskfile *tf = &qc->tf; | |
574 | unsigned char *sb = cmd->sense_buffer; | |
575 | ||
576 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
577 | ||
0e5dec47 | 578 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e JG |
579 | |
580 | /* | |
581 | * Read the controller registers. | |
582 | */ | |
583 | assert(NULL != qc->ap->ops->tf_read); | |
584 | qc->ap->ops->tf_read(qc->ap, tf); | |
585 | ||
586 | /* | |
587 | * Use ata_to_sense_error() to map status register bits | |
588 | * onto sense key, asc & ascq. | |
589 | */ | |
590 | if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) { | |
591 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, | |
592 | &sb[2], &sb[12], &sb[13]); | |
593 | sb[2] &= 0x0f; | |
1da177e4 | 594 | } |
1da177e4 LT |
595 | |
596 | sb[0] = 0x70; | |
b095518e | 597 | sb[7] = 0x0a; |
0274aa25 JG |
598 | |
599 | #if 0 /* when C/H/S support is merged */ | |
b095518e | 600 | if (tf->flags & ATA_TFLAG_LBA && !(tf->flags & ATA_TFLAG_LBA48)) { |
0274aa25 JG |
601 | #endif |
602 | if (!(tf->flags & ATA_TFLAG_LBA48)) { | |
b095518e JG |
603 | /* A small (28b) LBA will fit in the 32b info field */ |
604 | sb[0] |= 0x80; /* set valid bit */ | |
605 | sb[3] = tf->device & 0x0f; | |
606 | sb[4] = tf->lbah; | |
607 | sb[5] = tf->lbam; | |
608 | sb[6] = tf->lbal; | |
1da177e4 LT |
609 | } |
610 | } | |
611 | ||
612 | /** | |
613 | * ata_scsi_slave_config - Set SCSI device attributes | |
614 | * @sdev: SCSI device to examine | |
615 | * | |
616 | * This is called before we actually start reading | |
617 | * and writing to the device, to configure certain | |
618 | * SCSI mid-layer behaviors. | |
619 | * | |
620 | * LOCKING: | |
621 | * Defined by SCSI layer. We don't really care. | |
622 | */ | |
623 | ||
624 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
625 | { | |
626 | sdev->use_10_for_rw = 1; | |
627 | sdev->use_10_for_ms = 1; | |
628 | ||
629 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
630 | ||
631 | if (sdev->id < ATA_MAX_DEVICES) { | |
632 | struct ata_port *ap; | |
633 | struct ata_device *dev; | |
634 | ||
635 | ap = (struct ata_port *) &sdev->host->hostdata[0]; | |
636 | dev = &ap->device[sdev->id]; | |
637 | ||
638 | /* TODO: 1024 is an arbitrary number, not the | |
639 | * hardware maximum. This should be increased to | |
640 | * 65534 when Jens Axboe's patch for dynamically | |
641 | * determining max_sectors is merged. | |
642 | */ | |
643 | if ((dev->flags & ATA_DFLAG_LBA48) && | |
644 | ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) { | |
f85bdb9c JL |
645 | /* |
646 | * do not overwrite sdev->host->max_sectors, since | |
647 | * other drives on this host may not support LBA48 | |
648 | */ | |
1da177e4 LT |
649 | blk_queue_max_sectors(sdev->request_queue, 2048); |
650 | } | |
651 | } | |
652 | ||
653 | return 0; /* scsi layer doesn't check return value, sigh */ | |
654 | } | |
655 | ||
656 | /** | |
657 | * ata_scsi_error - SCSI layer error handler callback | |
658 | * @host: SCSI host on which error occurred | |
659 | * | |
660 | * Handles SCSI-layer-thrown error events. | |
661 | * | |
662 | * LOCKING: | |
663 | * Inherited from SCSI layer (none, can sleep) | |
664 | * | |
665 | * RETURNS: | |
666 | * Zero. | |
667 | */ | |
668 | ||
669 | int ata_scsi_error(struct Scsi_Host *host) | |
670 | { | |
671 | struct ata_port *ap; | |
672 | ||
673 | DPRINTK("ENTER\n"); | |
674 | ||
675 | ap = (struct ata_port *) &host->hostdata[0]; | |
676 | ap->ops->eng_timeout(ap); | |
677 | ||
678 | /* TODO: this is per-command; when queueing is supported | |
679 | * this code will either change or move to a more | |
680 | * appropriate place | |
681 | */ | |
682 | host->host_failed--; | |
42517438 | 683 | INIT_LIST_HEAD(&host->eh_cmd_q); |
1da177e4 LT |
684 | |
685 | DPRINTK("EXIT\n"); | |
686 | return 0; | |
687 | } | |
688 | ||
972dcafb DG |
689 | /** |
690 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
691 | * @qc: Storage for translated ATA taskfile | |
692 | * @scsicmd: SCSI command to translate | |
693 | * | |
694 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
695 | * (to start). Perhaps these commands should be preceded by | |
696 | * CHECK POWER MODE to see what power mode the device is already in. | |
697 | * [See SAT revision 5 at www.t10.org] | |
698 | * | |
699 | * LOCKING: | |
700 | * spin_lock_irqsave(host_set lock) | |
701 | * | |
702 | * RETURNS: | |
703 | * Zero on success, non-zero on error. | |
704 | */ | |
705 | ||
706 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, | |
707 | u8 *scsicmd) | |
708 | { | |
709 | struct ata_taskfile *tf = &qc->tf; | |
710 | ||
711 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
712 | tf->protocol = ATA_PROT_NODATA; | |
713 | if (scsicmd[1] & 0x1) { | |
714 | ; /* ignore IMMED bit, violates sat-r05 */ | |
715 | } | |
716 | if (scsicmd[4] & 0x2) | |
717 | return 1; /* LOEJ bit set not supported */ | |
718 | if (((scsicmd[4] >> 4) & 0xf) != 0) | |
719 | return 1; /* power conditions not supported */ | |
720 | if (scsicmd[4] & 0x1) { | |
721 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
722 | tf->lbah = 0x0; | |
723 | tf->lbam = 0x0; | |
724 | tf->lbal = 0x0; | |
725 | tf->device |= ATA_LBA; | |
726 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ | |
727 | } else { | |
728 | tf->nsect = 0; /* time period value (0 implies now) */ | |
729 | tf->command = ATA_CMD_STANDBY; | |
730 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
731 | } | |
732 | /* | |
733 | * Standby and Idle condition timers could be implemented but that | |
734 | * would require libata to implement the Power condition mode page | |
735 | * and allow the user to change it. Changing mode pages requires | |
736 | * MODE SELECT to be implemented. | |
737 | */ | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | ||
1da177e4 LT |
743 | /** |
744 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
745 | * @qc: Storage for translated ATA taskfile | |
746 | * @scsicmd: SCSI command to translate (ignored) | |
747 | * | |
748 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
749 | * FLUSH CACHE EXT. | |
750 | * | |
751 | * LOCKING: | |
752 | * spin_lock_irqsave(host_set lock) | |
753 | * | |
754 | * RETURNS: | |
755 | * Zero on success, non-zero on error. | |
756 | */ | |
757 | ||
758 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
759 | { | |
760 | struct ata_taskfile *tf = &qc->tf; | |
761 | ||
762 | tf->flags |= ATA_TFLAG_DEVICE; | |
763 | tf->protocol = ATA_PROT_NODATA; | |
764 | ||
765 | if ((tf->flags & ATA_TFLAG_LBA48) && | |
766 | (ata_id_has_flush_ext(qc->dev->id))) | |
767 | tf->command = ATA_CMD_FLUSH_EXT; | |
768 | else | |
769 | tf->command = ATA_CMD_FLUSH; | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | /** | |
775 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
776 | * @qc: Storage for translated ATA taskfile | |
777 | * @scsicmd: SCSI command to translate | |
778 | * | |
779 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
780 | * | |
781 | * LOCKING: | |
782 | * spin_lock_irqsave(host_set lock) | |
783 | * | |
784 | * RETURNS: | |
785 | * Zero on success, non-zero on error. | |
786 | */ | |
787 | ||
788 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
789 | { | |
790 | struct ata_taskfile *tf = &qc->tf; | |
791 | unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; | |
792 | u64 dev_sectors = qc->dev->n_sectors; | |
793 | u64 sect = 0; | |
794 | u32 n_sect = 0; | |
795 | ||
796 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
797 | tf->protocol = ATA_PROT_NODATA; | |
798 | tf->device |= ATA_LBA; | |
799 | ||
800 | if (scsicmd[0] == VERIFY) { | |
801 | sect |= ((u64)scsicmd[2]) << 24; | |
802 | sect |= ((u64)scsicmd[3]) << 16; | |
803 | sect |= ((u64)scsicmd[4]) << 8; | |
804 | sect |= ((u64)scsicmd[5]); | |
805 | ||
806 | n_sect |= ((u32)scsicmd[7]) << 8; | |
807 | n_sect |= ((u32)scsicmd[8]); | |
808 | } | |
809 | ||
810 | else if (scsicmd[0] == VERIFY_16) { | |
811 | sect |= ((u64)scsicmd[2]) << 56; | |
812 | sect |= ((u64)scsicmd[3]) << 48; | |
813 | sect |= ((u64)scsicmd[4]) << 40; | |
814 | sect |= ((u64)scsicmd[5]) << 32; | |
815 | sect |= ((u64)scsicmd[6]) << 24; | |
816 | sect |= ((u64)scsicmd[7]) << 16; | |
817 | sect |= ((u64)scsicmd[8]) << 8; | |
818 | sect |= ((u64)scsicmd[9]); | |
819 | ||
820 | n_sect |= ((u32)scsicmd[10]) << 24; | |
821 | n_sect |= ((u32)scsicmd[11]) << 16; | |
822 | n_sect |= ((u32)scsicmd[12]) << 8; | |
823 | n_sect |= ((u32)scsicmd[13]); | |
824 | } | |
825 | ||
826 | else | |
827 | return 1; | |
828 | ||
829 | if (!n_sect) | |
830 | return 1; | |
831 | if (sect >= dev_sectors) | |
832 | return 1; | |
833 | if ((sect + n_sect) > dev_sectors) | |
834 | return 1; | |
835 | if (lba48) { | |
836 | if (n_sect > (64 * 1024)) | |
837 | return 1; | |
838 | } else { | |
839 | if (n_sect > 256) | |
840 | return 1; | |
841 | } | |
842 | ||
843 | if (lba48) { | |
844 | tf->command = ATA_CMD_VERIFY_EXT; | |
845 | ||
846 | tf->hob_nsect = (n_sect >> 8) & 0xff; | |
847 | ||
848 | tf->hob_lbah = (sect >> 40) & 0xff; | |
849 | tf->hob_lbam = (sect >> 32) & 0xff; | |
850 | tf->hob_lbal = (sect >> 24) & 0xff; | |
851 | } else { | |
852 | tf->command = ATA_CMD_VERIFY; | |
853 | ||
854 | tf->device |= (sect >> 24) & 0xf; | |
855 | } | |
856 | ||
857 | tf->nsect = n_sect & 0xff; | |
858 | ||
859 | tf->lbah = (sect >> 16) & 0xff; | |
860 | tf->lbam = (sect >> 8) & 0xff; | |
861 | tf->lbal = sect & 0xff; | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | /** | |
867 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
868 | * @qc: Storage for translated ATA taskfile | |
869 | * @scsicmd: SCSI command to translate | |
870 | * | |
871 | * Converts any of six SCSI read/write commands into the | |
872 | * ATA counterpart, including starting sector (LBA), | |
873 | * sector count, and taking into account the device's LBA48 | |
874 | * support. | |
875 | * | |
876 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
877 | * %WRITE_16 are currently supported. | |
878 | * | |
879 | * LOCKING: | |
880 | * spin_lock_irqsave(host_set lock) | |
881 | * | |
882 | * RETURNS: | |
883 | * Zero on success, non-zero on error. | |
884 | */ | |
885 | ||
886 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
887 | { | |
888 | struct ata_taskfile *tf = &qc->tf; | |
889 | unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; | |
890 | ||
891 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
892 | tf->protocol = qc->dev->xfer_protocol; | |
893 | tf->device |= ATA_LBA; | |
894 | ||
895 | if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 || | |
896 | scsicmd[0] == READ_16) { | |
897 | tf->command = qc->dev->read_cmd; | |
898 | } else { | |
899 | tf->command = qc->dev->write_cmd; | |
900 | tf->flags |= ATA_TFLAG_WRITE; | |
901 | } | |
902 | ||
903 | if (scsicmd[0] == READ_10 || scsicmd[0] == WRITE_10) { | |
904 | if (lba48) { | |
905 | tf->hob_nsect = scsicmd[7]; | |
906 | tf->hob_lbal = scsicmd[2]; | |
907 | ||
908 | qc->nsect = ((unsigned int)scsicmd[7] << 8) | | |
909 | scsicmd[8]; | |
910 | } else { | |
911 | /* if we don't support LBA48 addressing, the request | |
912 | * -may- be too large. */ | |
913 | if ((scsicmd[2] & 0xf0) || scsicmd[7]) | |
914 | return 1; | |
915 | ||
916 | /* stores LBA27:24 in lower 4 bits of device reg */ | |
917 | tf->device |= scsicmd[2]; | |
918 | ||
919 | qc->nsect = scsicmd[8]; | |
920 | } | |
921 | ||
922 | tf->nsect = scsicmd[8]; | |
923 | tf->lbal = scsicmd[5]; | |
924 | tf->lbam = scsicmd[4]; | |
925 | tf->lbah = scsicmd[3]; | |
926 | ||
927 | VPRINTK("ten-byte command\n"); | |
13593265 JG |
928 | if (qc->nsect == 0) /* we don't support length==0 cmds */ |
929 | return 1; | |
1da177e4 LT |
930 | return 0; |
931 | } | |
932 | ||
933 | if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) { | |
934 | qc->nsect = tf->nsect = scsicmd[4]; | |
13593265 JG |
935 | if (!qc->nsect) { |
936 | qc->nsect = 256; | |
937 | if (lba48) | |
938 | tf->hob_nsect = 1; | |
939 | } | |
940 | ||
1da177e4 LT |
941 | tf->lbal = scsicmd[3]; |
942 | tf->lbam = scsicmd[2]; | |
943 | tf->lbah = scsicmd[1] & 0x1f; /* mask out reserved bits */ | |
944 | ||
945 | VPRINTK("six-byte command\n"); | |
946 | return 0; | |
947 | } | |
948 | ||
949 | if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) { | |
950 | /* rule out impossible LBAs and sector counts */ | |
951 | if (scsicmd[2] || scsicmd[3] || scsicmd[10] || scsicmd[11]) | |
952 | return 1; | |
953 | ||
954 | if (lba48) { | |
955 | tf->hob_nsect = scsicmd[12]; | |
956 | tf->hob_lbal = scsicmd[6]; | |
957 | tf->hob_lbam = scsicmd[5]; | |
958 | tf->hob_lbah = scsicmd[4]; | |
959 | ||
960 | qc->nsect = ((unsigned int)scsicmd[12] << 8) | | |
961 | scsicmd[13]; | |
962 | } else { | |
963 | /* once again, filter out impossible non-zero values */ | |
964 | if (scsicmd[4] || scsicmd[5] || scsicmd[12] || | |
965 | (scsicmd[6] & 0xf0)) | |
966 | return 1; | |
967 | ||
968 | /* stores LBA27:24 in lower 4 bits of device reg */ | |
969 | tf->device |= scsicmd[6]; | |
970 | ||
971 | qc->nsect = scsicmd[13]; | |
972 | } | |
973 | ||
974 | tf->nsect = scsicmd[13]; | |
975 | tf->lbal = scsicmd[9]; | |
976 | tf->lbam = scsicmd[8]; | |
977 | tf->lbah = scsicmd[7]; | |
978 | ||
979 | VPRINTK("sixteen-byte command\n"); | |
13593265 JG |
980 | if (qc->nsect == 0) /* we don't support length==0 cmds */ |
981 | return 1; | |
1da177e4 LT |
982 | return 0; |
983 | } | |
984 | ||
985 | DPRINTK("no-byte command\n"); | |
986 | return 1; | |
987 | } | |
988 | ||
989 | static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) | |
990 | { | |
991 | struct scsi_cmnd *cmd = qc->scsicmd; | |
b095518e JG |
992 | int need_sense = drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ); |
993 | ||
994 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
995 | * user mandated it or if there's an error. Note that if we | |
996 | * generate because the user forced us to, a check condition | |
997 | * is generated and the ATA register values are returned | |
998 | * whether the command completed successfully or not. If there | |
999 | * was no error, SK, ASC and ASCQ will all be zero. | |
1000 | */ | |
1001 | if (((cmd->cmnd[0] == ATA_16) || (cmd->cmnd[0] == ATA_12)) && | |
1002 | ((cmd->cmnd[2] & 0x20) || need_sense)) { | |
1003 | ata_gen_ata_desc_sense(qc); | |
1004 | } else { | |
1005 | if (!need_sense) { | |
1006 | cmd->result = SAM_STAT_GOOD; | |
1007 | } else { | |
1008 | /* TODO: decide which descriptor format to use | |
1009 | * for 48b LBA devices and call that here | |
1010 | * instead of the fixed desc, which is only | |
1011 | * good for smaller LBA (and maybe CHS?) | |
1012 | * devices. | |
1013 | */ | |
1014 | ata_gen_fixed_sense(qc); | |
1015 | } | |
1016 | } | |
1da177e4 | 1017 | |
b095518e JG |
1018 | if (need_sense) { |
1019 | /* The ata_gen_..._sense routines fill in tf */ | |
1020 | ata_dump_status(qc->ap->id, &qc->tf); | |
1021 | } | |
1da177e4 LT |
1022 | |
1023 | qc->scsidone(cmd); | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | /** | |
1029 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1030 | * @ap: ATA port to which the command is addressed | |
1031 | * @dev: ATA device to which the command is addressed | |
1032 | * @cmd: SCSI command to execute | |
1033 | * @done: SCSI command completion function | |
1034 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1035 | * | |
1036 | * Our ->queuecommand() function has decided that the SCSI | |
1037 | * command issued can be directly translated into an ATA | |
1038 | * command, rather than handled internally. | |
1039 | * | |
1040 | * This function sets up an ata_queued_cmd structure for the | |
1041 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1042 | * | |
1043 | * LOCKING: | |
1044 | * spin_lock_irqsave(host_set lock) | |
1045 | */ | |
1046 | ||
1047 | static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, | |
1048 | struct scsi_cmnd *cmd, | |
1049 | void (*done)(struct scsi_cmnd *), | |
1050 | ata_xlat_func_t xlat_func) | |
1051 | { | |
1052 | struct ata_queued_cmd *qc; | |
1053 | u8 *scsicmd = cmd->cmnd; | |
1054 | ||
1055 | VPRINTK("ENTER\n"); | |
1056 | ||
1057 | qc = ata_scsi_qc_new(ap, dev, cmd, done); | |
1058 | if (!qc) | |
1059 | return; | |
1060 | ||
1061 | /* data is present; dma-map it */ | |
0274aa25 JG |
1062 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1063 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 LT |
1064 | if (unlikely(cmd->request_bufflen < 1)) { |
1065 | printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", | |
1066 | ap->id, dev->devno); | |
1067 | goto err_out; | |
1068 | } | |
1069 | ||
1070 | if (cmd->use_sg) | |
1071 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1072 | else | |
1073 | ata_sg_init_one(qc, cmd->request_buffer, | |
1074 | cmd->request_bufflen); | |
1075 | ||
1076 | qc->dma_dir = cmd->sc_data_direction; | |
1077 | } | |
1078 | ||
1079 | qc->complete_fn = ata_scsi_qc_complete; | |
1080 | ||
1081 | if (xlat_func(qc, scsicmd)) | |
1082 | goto err_out; | |
1da177e4 LT |
1083 | /* select device, send command to hardware */ |
1084 | if (ata_qc_issue(qc)) | |
1085 | goto err_out; | |
1086 | ||
1087 | VPRINTK("EXIT\n"); | |
1088 | return; | |
1089 | ||
1090 | err_out: | |
1091 | ata_qc_free(qc); | |
1092 | ata_bad_cdb(cmd, done); | |
1093 | DPRINTK("EXIT - badcmd\n"); | |
1094 | } | |
1095 | ||
1096 | /** | |
1097 | * ata_scsi_rbuf_get - Map response buffer. | |
1098 | * @cmd: SCSI command containing buffer to be mapped. | |
1099 | * @buf_out: Pointer to mapped area. | |
1100 | * | |
1101 | * Maps buffer contained within SCSI command @cmd. | |
1102 | * | |
1103 | * LOCKING: | |
1104 | * spin_lock_irqsave(host_set lock) | |
1105 | * | |
1106 | * RETURNS: | |
1107 | * Length of response buffer. | |
1108 | */ | |
1109 | ||
1110 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1111 | { | |
1112 | u8 *buf; | |
1113 | unsigned int buflen; | |
1114 | ||
1115 | if (cmd->use_sg) { | |
1116 | struct scatterlist *sg; | |
1117 | ||
1118 | sg = (struct scatterlist *) cmd->request_buffer; | |
1119 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
1120 | buflen = sg->length; | |
1121 | } else { | |
1122 | buf = cmd->request_buffer; | |
1123 | buflen = cmd->request_bufflen; | |
1124 | } | |
1125 | ||
1126 | *buf_out = buf; | |
1127 | return buflen; | |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1132 | * @cmd: SCSI command containing buffer to be unmapped. | |
1133 | * @buf: buffer to unmap | |
1134 | * | |
1135 | * Unmaps response buffer contained within @cmd. | |
1136 | * | |
1137 | * LOCKING: | |
1138 | * spin_lock_irqsave(host_set lock) | |
1139 | */ | |
1140 | ||
1141 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1142 | { | |
1143 | if (cmd->use_sg) { | |
1144 | struct scatterlist *sg; | |
1145 | ||
1146 | sg = (struct scatterlist *) cmd->request_buffer; | |
1147 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | /** | |
1152 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1153 | * @args: device IDENTIFY data / SCSI command of interest. | |
1154 | * @actor: Callback hook for desired SCSI command simulator | |
1155 | * | |
1156 | * Takes care of the hard work of simulating a SCSI command... | |
1157 | * Mapping the response buffer, calling the command's handler, | |
1158 | * and handling the handler's return value. This return value | |
1159 | * indicates whether the handler wishes the SCSI command to be | |
1160 | * completed successfully, or not. | |
1161 | * | |
1162 | * LOCKING: | |
1163 | * spin_lock_irqsave(host_set lock) | |
1164 | */ | |
1165 | ||
1166 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1167 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1168 | u8 *rbuf, unsigned int buflen)) | |
1169 | { | |
1170 | u8 *rbuf; | |
1171 | unsigned int buflen, rc; | |
1172 | struct scsi_cmnd *cmd = args->cmd; | |
1173 | ||
1174 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1175 | memset(rbuf, 0, buflen); | |
1176 | rc = actor(args, rbuf, buflen); | |
1177 | ata_scsi_rbuf_put(cmd, rbuf); | |
1178 | ||
1179 | if (rc) | |
1180 | ata_bad_cdb(cmd, args->done); | |
1181 | else { | |
1182 | cmd->result = SAM_STAT_GOOD; | |
1183 | args->done(cmd); | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1189 | * @args: device IDENTIFY data / SCSI command of interest. | |
1190 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1191 | * @buflen: Response buffer length. | |
1192 | * | |
1193 | * Returns standard device identification data associated | |
1194 | * with non-EVPD INQUIRY command output. | |
1195 | * | |
1196 | * LOCKING: | |
1197 | * spin_lock_irqsave(host_set lock) | |
1198 | */ | |
1199 | ||
1200 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1201 | unsigned int buflen) | |
1202 | { | |
1203 | u8 hdr[] = { | |
1204 | TYPE_DISK, | |
1205 | 0, | |
1206 | 0x5, /* claim SPC-3 version compatibility */ | |
1207 | 2, | |
1208 | 95 - 4 | |
1209 | }; | |
1210 | ||
1211 | /* set scsi removeable (RMB) bit per ata bit */ | |
1212 | if (ata_id_removeable(args->id)) | |
1213 | hdr[1] |= (1 << 7); | |
1214 | ||
1215 | VPRINTK("ENTER\n"); | |
1216 | ||
1217 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1218 | ||
1219 | if (buflen > 35) { | |
1220 | memcpy(&rbuf[8], "ATA ", 8); | |
1221 | ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); | |
1222 | ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1223 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1224 | memcpy(&rbuf[32], "n/a ", 4); | |
1225 | } | |
1226 | ||
1227 | if (buflen > 63) { | |
1228 | const u8 versions[] = { | |
1229 | 0x60, /* SAM-3 (no version claimed) */ | |
1230 | ||
1231 | 0x03, | |
1232 | 0x20, /* SBC-2 (no version claimed) */ | |
1233 | ||
1234 | 0x02, | |
1235 | 0x60 /* SPC-3 (no version claimed) */ | |
1236 | }; | |
1237 | ||
1238 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1239 | } | |
1240 | ||
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages | |
1246 | * @args: device IDENTIFY data / SCSI command of interest. | |
1247 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1248 | * @buflen: Response buffer length. | |
1249 | * | |
1250 | * Returns list of inquiry EVPD pages available. | |
1251 | * | |
1252 | * LOCKING: | |
1253 | * spin_lock_irqsave(host_set lock) | |
1254 | */ | |
1255 | ||
1256 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1257 | unsigned int buflen) | |
1258 | { | |
1259 | const u8 pages[] = { | |
1260 | 0x00, /* page 0x00, this page */ | |
1261 | 0x80, /* page 0x80, unit serial no page */ | |
1262 | 0x83 /* page 0x83, device ident page */ | |
1263 | }; | |
1264 | rbuf[3] = sizeof(pages); /* number of supported EVPD pages */ | |
1265 | ||
1266 | if (buflen > 6) | |
1267 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | /** | |
1273 | * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number | |
1274 | * @args: device IDENTIFY data / SCSI command of interest. | |
1275 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1276 | * @buflen: Response buffer length. | |
1277 | * | |
1278 | * Returns ATA device serial number. | |
1279 | * | |
1280 | * LOCKING: | |
1281 | * spin_lock_irqsave(host_set lock) | |
1282 | */ | |
1283 | ||
1284 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1285 | unsigned int buflen) | |
1286 | { | |
1287 | const u8 hdr[] = { | |
1288 | 0, | |
1289 | 0x80, /* this page code */ | |
1290 | 0, | |
1291 | ATA_SERNO_LEN, /* page len */ | |
1292 | }; | |
1293 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1294 | ||
1295 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
1296 | ata_dev_id_string(args->id, (unsigned char *) &rbuf[4], | |
1297 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1298 | ||
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | static const char *inq_83_str = "Linux ATA-SCSI simulator"; | |
1303 | ||
1304 | /** | |
1305 | * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity | |
1306 | * @args: device IDENTIFY data / SCSI command of interest. | |
1307 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1308 | * @buflen: Response buffer length. | |
1309 | * | |
1310 | * Returns device identification. Currently hardcoded to | |
1311 | * return "Linux ATA-SCSI simulator". | |
1312 | * | |
1313 | * LOCKING: | |
1314 | * spin_lock_irqsave(host_set lock) | |
1315 | */ | |
1316 | ||
1317 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1318 | unsigned int buflen) | |
1319 | { | |
1320 | rbuf[1] = 0x83; /* this page code */ | |
1321 | rbuf[3] = 4 + strlen(inq_83_str); /* page len */ | |
1322 | ||
1323 | /* our one and only identification descriptor (vendor-specific) */ | |
1324 | if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) { | |
1325 | rbuf[4 + 0] = 2; /* code set: ASCII */ | |
1326 | rbuf[4 + 3] = strlen(inq_83_str); | |
1327 | memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str)); | |
1328 | } | |
1329 | ||
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | /** | |
0cba632b | 1334 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1335 | * @args: device IDENTIFY data / SCSI command of interest. |
1336 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1337 | * @buflen: Response buffer length. | |
1338 | * | |
1339 | * No operation. Simply returns success to caller, to indicate | |
1340 | * that the caller should successfully complete this SCSI command. | |
1341 | * | |
1342 | * LOCKING: | |
1343 | * spin_lock_irqsave(host_set lock) | |
1344 | */ | |
1345 | ||
1346 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1347 | unsigned int buflen) | |
1348 | { | |
1349 | VPRINTK("ENTER\n"); | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | /** | |
1354 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1355 | * @ptr_io: (input/output) Location to store more output data | |
1356 | * @last: End of output data buffer | |
1357 | * @buf: Pointer to BLOB being added to output buffer | |
1358 | * @buflen: Length of BLOB | |
1359 | * | |
1360 | * Store MODE SENSE data on an output buffer. | |
1361 | * | |
1362 | * LOCKING: | |
1363 | * None. | |
1364 | */ | |
1365 | ||
1366 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1367 | const u8 *buf, unsigned int buflen) | |
1368 | { | |
1369 | u8 *ptr = *ptr_io; | |
1370 | ||
1371 | if ((ptr + buflen - 1) > last) | |
1372 | return; | |
1373 | ||
1374 | memcpy(ptr, buf, buflen); | |
1375 | ||
1376 | ptr += buflen; | |
1377 | ||
1378 | *ptr_io = ptr; | |
1379 | } | |
1380 | ||
1381 | /** | |
1382 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1383 | * @id: device IDENTIFY data | |
1384 | * @ptr_io: (input/output) Location to store more output data | |
1385 | * @last: End of output data buffer | |
1386 | * | |
1387 | * Generate a caching info page, which conditionally indicates | |
1388 | * write caching to the SCSI layer, depending on device | |
1389 | * capabilities. | |
1390 | * | |
1391 | * LOCKING: | |
1392 | * None. | |
1393 | */ | |
1394 | ||
1395 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1396 | const u8 *last) | |
1397 | { | |
1398 | u8 page[] = { | |
1399 | 0x8, /* page code */ | |
1400 | 0x12, /* page length */ | |
1401 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */ | |
1402 | 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */ | |
1403 | }; | |
1404 | ||
1405 | if (ata_id_wcache_enabled(id)) | |
1406 | page[2] |= (1 << 2); /* write cache enable */ | |
1407 | if (!ata_id_rahead_enabled(id)) | |
1408 | page[12] |= (1 << 5); /* disable read ahead */ | |
1409 | ||
1410 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1411 | return sizeof(page); | |
1412 | } | |
1413 | ||
1414 | /** | |
1415 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1416 | * @dev: Device associated with this MODE SENSE command | |
1417 | * @ptr_io: (input/output) Location to store more output data | |
1418 | * @last: End of output data buffer | |
1419 | * | |
1420 | * Generate a generic MODE SENSE control mode page. | |
1421 | * | |
1422 | * LOCKING: | |
1423 | * None. | |
1424 | */ | |
1425 | ||
1426 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1427 | { | |
1428 | const u8 page[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30}; | |
1429 | ||
1430 | /* byte 2: set the descriptor format sense data bit (bit 2) | |
1431 | * since we need to support returning this format for SAT | |
1432 | * commands and any SCSI commands against a 48b LBA device. | |
1433 | */ | |
1434 | ||
1435 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1436 | return sizeof(page); | |
1437 | } | |
1438 | ||
1439 | /** | |
1440 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1441 | * @dev: Device associated with this MODE SENSE command | |
1442 | * @ptr_io: (input/output) Location to store more output data | |
1443 | * @last: End of output data buffer | |
1444 | * | |
1445 | * Generate a generic MODE SENSE r/w error recovery page. | |
1446 | * | |
1447 | * LOCKING: | |
1448 | * None. | |
1449 | */ | |
1450 | ||
1451 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1452 | { | |
1453 | const u8 page[] = { | |
1454 | 0x1, /* page code */ | |
1455 | 0xa, /* page length */ | |
1456 | (1 << 7) | (1 << 6), /* note auto r/w reallocation */ | |
1457 | 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */ | |
1458 | }; | |
1459 | ||
1460 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1461 | return sizeof(page); | |
1462 | } | |
1463 | ||
1464 | /** | |
1465 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1466 | * @args: device IDENTIFY data / SCSI command of interest. | |
1467 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1468 | * @buflen: Response buffer length. | |
1469 | * | |
1470 | * Simulate MODE SENSE commands. | |
1471 | * | |
1472 | * LOCKING: | |
1473 | * spin_lock_irqsave(host_set lock) | |
1474 | */ | |
1475 | ||
1476 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1477 | unsigned int buflen) | |
1478 | { | |
1479 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
1480 | unsigned int page_control, six_byte, output_len; | |
1481 | ||
1482 | VPRINTK("ENTER\n"); | |
1483 | ||
1484 | six_byte = (scsicmd[0] == MODE_SENSE); | |
1485 | ||
1486 | /* we only support saved and current values (which we treat | |
1487 | * in the same manner) | |
1488 | */ | |
1489 | page_control = scsicmd[2] >> 6; | |
1490 | if ((page_control != 0) && (page_control != 3)) | |
1491 | return 1; | |
1492 | ||
1493 | if (six_byte) | |
1494 | output_len = 4; | |
1495 | else | |
1496 | output_len = 8; | |
1497 | ||
1498 | p = rbuf + output_len; | |
1499 | last = rbuf + buflen - 1; | |
1500 | ||
1501 | switch(scsicmd[2] & 0x3f) { | |
1502 | case 0x01: /* r/w error recovery */ | |
1503 | output_len += ata_msense_rw_recovery(&p, last); | |
1504 | break; | |
1505 | ||
1506 | case 0x08: /* caching */ | |
1507 | output_len += ata_msense_caching(args->id, &p, last); | |
1508 | break; | |
1509 | ||
1510 | case 0x0a: { /* control mode */ | |
1511 | output_len += ata_msense_ctl_mode(&p, last); | |
1512 | break; | |
1513 | } | |
1514 | ||
1515 | case 0x3f: /* all pages */ | |
1516 | output_len += ata_msense_rw_recovery(&p, last); | |
1517 | output_len += ata_msense_caching(args->id, &p, last); | |
1518 | output_len += ata_msense_ctl_mode(&p, last); | |
1519 | break; | |
1520 | ||
1521 | default: /* invalid page code */ | |
1522 | return 1; | |
1523 | } | |
1524 | ||
1525 | if (six_byte) { | |
1526 | output_len--; | |
1527 | rbuf[0] = output_len; | |
1528 | } else { | |
1529 | output_len -= 2; | |
1530 | rbuf[0] = output_len >> 8; | |
1531 | rbuf[1] = output_len; | |
1532 | } | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | /** | |
1538 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
1539 | * @args: device IDENTIFY data / SCSI command of interest. | |
1540 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1541 | * @buflen: Response buffer length. | |
1542 | * | |
1543 | * Simulate READ CAPACITY commands. | |
1544 | * | |
1545 | * LOCKING: | |
1546 | * spin_lock_irqsave(host_set lock) | |
1547 | */ | |
1548 | ||
1549 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
1550 | unsigned int buflen) | |
1551 | { | |
1552 | u64 n_sectors; | |
1553 | u32 tmp; | |
1554 | ||
1555 | VPRINTK("ENTER\n"); | |
1556 | ||
1557 | if (ata_id_has_lba48(args->id)) | |
1558 | n_sectors = ata_id_u64(args->id, 100); | |
1559 | else | |
1560 | n_sectors = ata_id_u32(args->id, 60); | |
1561 | n_sectors--; /* ATA TotalUserSectors - 1 */ | |
1562 | ||
1da177e4 | 1563 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
0c144d0d PP |
1564 | if( n_sectors >= 0xffffffffULL ) |
1565 | tmp = 0xffffffff ; /* Return max count on overflow */ | |
1566 | else | |
1567 | tmp = n_sectors ; | |
1568 | ||
1da177e4 LT |
1569 | /* sector count, 32-bit */ |
1570 | rbuf[0] = tmp >> (8 * 3); | |
1571 | rbuf[1] = tmp >> (8 * 2); | |
1572 | rbuf[2] = tmp >> (8 * 1); | |
1573 | rbuf[3] = tmp; | |
1574 | ||
1575 | /* sector size */ | |
1576 | tmp = ATA_SECT_SIZE; | |
1577 | rbuf[6] = tmp >> 8; | |
1578 | rbuf[7] = tmp; | |
1579 | ||
1580 | } else { | |
1581 | /* sector count, 64-bit */ | |
0c144d0d PP |
1582 | tmp = n_sectors >> (8 * 4); |
1583 | rbuf[2] = tmp >> (8 * 3); | |
1584 | rbuf[3] = tmp >> (8 * 2); | |
1585 | rbuf[4] = tmp >> (8 * 1); | |
1586 | rbuf[5] = tmp; | |
1587 | tmp = n_sectors; | |
1da177e4 LT |
1588 | rbuf[6] = tmp >> (8 * 3); |
1589 | rbuf[7] = tmp >> (8 * 2); | |
1590 | rbuf[8] = tmp >> (8 * 1); | |
1591 | rbuf[9] = tmp; | |
1592 | ||
1593 | /* sector size */ | |
1594 | tmp = ATA_SECT_SIZE; | |
1595 | rbuf[12] = tmp >> 8; | |
1596 | rbuf[13] = tmp; | |
1597 | } | |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
1604 | * @args: device IDENTIFY data / SCSI command of interest. | |
1605 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1606 | * @buflen: Response buffer length. | |
1607 | * | |
1608 | * Simulate REPORT LUNS command. | |
1609 | * | |
1610 | * LOCKING: | |
1611 | * spin_lock_irqsave(host_set lock) | |
1612 | */ | |
1613 | ||
1614 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
1615 | unsigned int buflen) | |
1616 | { | |
1617 | VPRINTK("ENTER\n"); | |
1618 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
1623 | /** | |
1624 | * ata_scsi_badcmd - End a SCSI request with an error | |
1625 | * @cmd: SCSI request to be handled | |
1626 | * @done: SCSI command completion function | |
1627 | * @asc: SCSI-defined additional sense code | |
1628 | * @ascq: SCSI-defined additional sense code qualifier | |
1629 | * | |
1630 | * Helper function that completes a SCSI command with | |
1631 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
1632 | * and the specified additional sense codes. | |
1633 | * | |
1634 | * LOCKING: | |
1635 | * spin_lock_irqsave(host_set lock) | |
1636 | */ | |
1637 | ||
1638 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
1639 | { | |
1640 | DPRINTK("ENTER\n"); | |
0e5dec47 | 1641 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
1da177e4 LT |
1642 | |
1643 | cmd->sense_buffer[0] = 0x70; | |
1644 | cmd->sense_buffer[2] = ILLEGAL_REQUEST; | |
1645 | cmd->sense_buffer[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */ | |
1646 | cmd->sense_buffer[12] = asc; | |
1647 | cmd->sense_buffer[13] = ascq; | |
1648 | ||
1649 | done(cmd); | |
1650 | } | |
1651 | ||
1652 | static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) | |
1653 | { | |
1654 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1655 | ||
1656 | if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) { | |
1657 | DPRINTK("request check condition\n"); | |
1658 | ||
1659 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
1660 | ||
1661 | qc->scsidone(cmd); | |
1662 | ||
1663 | return 1; | |
1664 | } else { | |
1665 | u8 *scsicmd = cmd->cmnd; | |
1666 | ||
1667 | if (scsicmd[0] == INQUIRY) { | |
1668 | u8 *buf = NULL; | |
1669 | unsigned int buflen; | |
1670 | ||
1671 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
1672 | buf[2] = 0x5; | |
1673 | buf[3] = (buf[3] & 0xf0) | 2; | |
1674 | ata_scsi_rbuf_put(cmd, buf); | |
1675 | } | |
1676 | cmd->result = SAM_STAT_GOOD; | |
1677 | } | |
1678 | ||
1679 | qc->scsidone(cmd); | |
1680 | ||
1681 | return 0; | |
1682 | } | |
1683 | /** | |
1684 | * atapi_xlat - Initialize PACKET taskfile | |
1685 | * @qc: command structure to be initialized | |
1686 | * @scsicmd: SCSI CDB associated with this PACKET command | |
1687 | * | |
1688 | * LOCKING: | |
1689 | * spin_lock_irqsave(host_set lock) | |
1690 | * | |
1691 | * RETURNS: | |
1692 | * Zero on success, non-zero on failure. | |
1693 | */ | |
1694 | ||
1695 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
1696 | { | |
1697 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1698 | struct ata_device *dev = qc->dev; | |
1699 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
0274aa25 | 1700 | int nodata = (cmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
1701 | |
1702 | if (!using_pio) | |
1703 | /* Check whether ATAPI DMA is safe */ | |
1704 | if (ata_check_atapi_dma(qc)) | |
1705 | using_pio = 1; | |
1706 | ||
1707 | memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len); | |
1708 | ||
1709 | qc->complete_fn = atapi_qc_complete; | |
1710 | ||
1711 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
0274aa25 | 1712 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
1713 | qc->tf.flags |= ATA_TFLAG_WRITE; |
1714 | DPRINTK("direction: write\n"); | |
1715 | } | |
1716 | ||
1717 | qc->tf.command = ATA_CMD_PACKET; | |
1718 | ||
1719 | /* no data, or PIO data xfer */ | |
1720 | if (using_pio || nodata) { | |
1721 | if (nodata) | |
1722 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
1723 | else | |
1724 | qc->tf.protocol = ATA_PROT_ATAPI; | |
1725 | qc->tf.lbam = (8 * 1024) & 0xff; | |
1726 | qc->tf.lbah = (8 * 1024) >> 8; | |
1727 | } | |
1728 | ||
1729 | /* DMA data xfer */ | |
1730 | else { | |
1731 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
1732 | qc->tf.feature |= ATAPI_PKT_DMA; | |
1733 | ||
1734 | #ifdef ATAPI_ENABLE_DMADIR | |
1735 | /* some SATA bridges need us to indicate data xfer direction */ | |
0274aa25 | 1736 | if (cmd->sc_data_direction != DMA_TO_DEVICE) |
1da177e4 LT |
1737 | qc->tf.feature |= ATAPI_DMADIR; |
1738 | #endif | |
1739 | } | |
1740 | ||
1741 | qc->nbytes = cmd->bufflen; | |
1742 | ||
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | /** | |
1747 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
1748 | * @ap: ATA port to which the device is attached | |
1749 | * @scsidev: SCSI device from which we derive the ATA device | |
1750 | * | |
1751 | * Given various information provided in struct scsi_cmnd, | |
1752 | * map that onto an ATA bus, and using that mapping | |
1753 | * determine which ata_device is associated with the | |
1754 | * SCSI command to be sent. | |
1755 | * | |
1756 | * LOCKING: | |
1757 | * spin_lock_irqsave(host_set lock) | |
1758 | * | |
1759 | * RETURNS: | |
1760 | * Associated ATA device, or %NULL if not found. | |
1761 | */ | |
1762 | ||
1763 | static struct ata_device * | |
1764 | ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev) | |
1765 | { | |
1766 | struct ata_device *dev; | |
1767 | ||
1768 | /* skip commands not addressed to targets we simulate */ | |
1769 | if (likely(scsidev->id < ATA_MAX_DEVICES)) | |
1770 | dev = &ap->device[scsidev->id]; | |
1771 | else | |
1772 | return NULL; | |
1773 | ||
1774 | if (unlikely((scsidev->channel != 0) || | |
1775 | (scsidev->lun != 0))) | |
1776 | return NULL; | |
1777 | ||
1778 | if (unlikely(!ata_dev_present(dev))) | |
1779 | return NULL; | |
1780 | ||
6f106233 | 1781 | if (!atapi_enabled) { |
1623c81e JG |
1782 | if (unlikely(dev->class == ATA_DEV_ATAPI)) |
1783 | return NULL; | |
1784 | } | |
1da177e4 LT |
1785 | |
1786 | return dev; | |
1787 | } | |
1788 | ||
b095518e JG |
1789 | /* |
1790 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
1791 | * @byte1: Byte 1 from pass-thru CDB. | |
1792 | * | |
1793 | * RETURNS: | |
1794 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
1795 | */ | |
1796 | static u8 | |
1797 | ata_scsi_map_proto(u8 byte1) | |
1798 | { | |
1799 | switch((byte1 & 0x1e) >> 1) { | |
1800 | case 3: /* Non-data */ | |
1801 | return ATA_PROT_NODATA; | |
1802 | ||
1803 | case 6: /* DMA */ | |
1804 | return ATA_PROT_DMA; | |
1805 | ||
1806 | case 4: /* PIO Data-in */ | |
1807 | case 5: /* PIO Data-out */ | |
1808 | if (byte1 & 0xe0) { | |
1809 | return ATA_PROT_PIO_MULT; | |
1810 | } | |
1811 | return ATA_PROT_PIO; | |
1812 | ||
1813 | case 10: /* Device Reset */ | |
1814 | case 0: /* Hard Reset */ | |
1815 | case 1: /* SRST */ | |
1816 | case 2: /* Bus Idle */ | |
1817 | case 7: /* Packet */ | |
1818 | case 8: /* DMA Queued */ | |
1819 | case 9: /* Device Diagnostic */ | |
1820 | case 11: /* UDMA Data-in */ | |
1821 | case 12: /* UDMA Data-Out */ | |
1822 | case 13: /* FPDMA */ | |
1823 | default: /* Reserved */ | |
1824 | break; | |
1825 | } | |
1826 | ||
1827 | return ATA_PROT_UNKNOWN; | |
1828 | } | |
1829 | ||
1830 | /** | |
1831 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
1832 | * @qc: command structure to be initialized | |
1833 | * @cmd: SCSI command to convert | |
1834 | * | |
1835 | * Handles either 12 or 16-byte versions of the CDB. | |
1836 | * | |
1837 | * RETURNS: | |
1838 | * Zero on success, non-zero on failure. | |
1839 | */ | |
1840 | static unsigned int | |
1841 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, u8 *scsicmd) | |
1842 | { | |
1843 | struct ata_taskfile *tf = &(qc->tf); | |
1844 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1845 | ||
1846 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) | |
1847 | return 1; | |
1848 | ||
1849 | /* | |
1850 | * 12 and 16 byte CDBs use different offsets to | |
1851 | * provide the various register values. | |
1852 | */ | |
1853 | if (scsicmd[0] == ATA_16) { | |
1854 | /* | |
1855 | * 16-byte CDB - may contain extended commands. | |
1856 | * | |
1857 | * If that is the case, copy the upper byte register values. | |
1858 | */ | |
1859 | if (scsicmd[1] & 0x01) { | |
1860 | tf->hob_feature = scsicmd[3]; | |
1861 | tf->hob_nsect = scsicmd[5]; | |
1862 | tf->hob_lbal = scsicmd[7]; | |
1863 | tf->hob_lbam = scsicmd[9]; | |
1864 | tf->hob_lbah = scsicmd[11]; | |
1865 | tf->flags |= ATA_TFLAG_LBA48; | |
1866 | } else | |
1867 | tf->flags &= ~ATA_TFLAG_LBA48; | |
1868 | ||
1869 | /* | |
1870 | * Always copy low byte, device and command registers. | |
1871 | */ | |
1872 | tf->feature = scsicmd[4]; | |
1873 | tf->nsect = scsicmd[6]; | |
1874 | tf->lbal = scsicmd[8]; | |
1875 | tf->lbam = scsicmd[10]; | |
1876 | tf->lbah = scsicmd[12]; | |
1877 | tf->device = scsicmd[13]; | |
1878 | tf->command = scsicmd[14]; | |
1879 | } else { | |
1880 | /* | |
1881 | * 12-byte CDB - incapable of extended commands. | |
1882 | */ | |
1883 | tf->flags &= ~ATA_TFLAG_LBA48; | |
1884 | ||
1885 | tf->feature = scsicmd[3]; | |
1886 | tf->nsect = scsicmd[4]; | |
1887 | tf->lbal = scsicmd[5]; | |
1888 | tf->lbam = scsicmd[6]; | |
1889 | tf->lbah = scsicmd[7]; | |
1890 | tf->device = scsicmd[8]; | |
1891 | tf->command = scsicmd[9]; | |
1892 | } | |
1893 | ||
1894 | /* | |
1895 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
1896 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
1897 | * by an update to hardware-specific registers for each | |
1898 | * controller (i.e. the reason for ->set_piomode(), | |
1899 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
1900 | */ | |
1901 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
1902 | && (tf->feature == SETFEATURES_XFER)) | |
1903 | return 1; | |
1904 | ||
1905 | /* | |
1906 | * Set flags so that all registers will be written, | |
1907 | * and pass on write indication (used for PIO/DMA | |
1908 | * setup.) | |
1909 | */ | |
1910 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
1911 | ||
0274aa25 | 1912 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
1913 | tf->flags |= ATA_TFLAG_WRITE; |
1914 | ||
1915 | /* | |
1916 | * Set transfer length. | |
1917 | * | |
1918 | * TODO: find out if we need to do more here to | |
1919 | * cover scatter/gather case. | |
1920 | */ | |
1921 | qc->nsect = cmd->bufflen / ATA_SECT_SIZE; | |
1922 | ||
1923 | return 0; | |
1924 | } | |
1925 | ||
1da177e4 LT |
1926 | /** |
1927 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
1928 | * @dev: ATA device | |
1929 | * @cmd: SCSI command opcode to consider | |
1930 | * | |
1931 | * Look up the SCSI command given, and determine whether the | |
1932 | * SCSI command is to be translated or simulated. | |
1933 | * | |
1934 | * RETURNS: | |
1935 | * Pointer to translation function if possible, %NULL if not. | |
1936 | */ | |
1937 | ||
1938 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
1939 | { | |
1940 | switch (cmd) { | |
1941 | case READ_6: | |
1942 | case READ_10: | |
1943 | case READ_16: | |
1944 | ||
1945 | case WRITE_6: | |
1946 | case WRITE_10: | |
1947 | case WRITE_16: | |
1948 | return ata_scsi_rw_xlat; | |
1949 | ||
1950 | case SYNCHRONIZE_CACHE: | |
1951 | if (ata_try_flush_cache(dev)) | |
1952 | return ata_scsi_flush_xlat; | |
1953 | break; | |
1954 | ||
1955 | case VERIFY: | |
1956 | case VERIFY_16: | |
1957 | return ata_scsi_verify_xlat; | |
b095518e JG |
1958 | |
1959 | case ATA_12: | |
1960 | case ATA_16: | |
1961 | return ata_scsi_pass_thru; | |
da61396d | 1962 | |
972dcafb DG |
1963 | case START_STOP: |
1964 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
1965 | } |
1966 | ||
1967 | return NULL; | |
1968 | } | |
1969 | ||
1970 | /** | |
1971 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
1972 | * @ap: ATA port to which the command was being sent | |
1973 | * @cmd: SCSI command to dump | |
1974 | * | |
1975 | * Prints the contents of a SCSI command via printk(). | |
1976 | */ | |
1977 | ||
1978 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
1979 | struct scsi_cmnd *cmd) | |
1980 | { | |
1981 | #ifdef ATA_DEBUG | |
1982 | struct scsi_device *scsidev = cmd->device; | |
1983 | u8 *scsicmd = cmd->cmnd; | |
1984 | ||
1985 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
1986 | ap->id, | |
1987 | scsidev->channel, scsidev->id, scsidev->lun, | |
1988 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
1989 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
1990 | scsicmd[8]); | |
1991 | #endif | |
1992 | } | |
1993 | ||
1994 | /** | |
1995 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
1996 | * @cmd: SCSI command to be sent | |
1997 | * @done: Completion function, called when command is complete | |
1998 | * | |
1999 | * In some cases, this function translates SCSI commands into | |
2000 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2001 | * hardware. In other cases, this function simulates a | |
2002 | * SCSI device by evaluating and responding to certain | |
2003 | * SCSI commands. This creates the overall effect of | |
2004 | * ATA and ATAPI devices appearing as SCSI devices. | |
2005 | * | |
2006 | * LOCKING: | |
2007 | * Releases scsi-layer-held lock, and obtains host_set lock. | |
2008 | * | |
2009 | * RETURNS: | |
2010 | * Zero. | |
2011 | */ | |
2012 | ||
2013 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
2014 | { | |
2015 | struct ata_port *ap; | |
2016 | struct ata_device *dev; | |
2017 | struct scsi_device *scsidev = cmd->device; | |
2018 | ||
2019 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
2020 | ||
2021 | ata_scsi_dump_cdb(ap, cmd); | |
2022 | ||
2023 | dev = ata_scsi_find_dev(ap, scsidev); | |
2024 | if (unlikely(!dev)) { | |
2025 | cmd->result = (DID_BAD_TARGET << 16); | |
2026 | done(cmd); | |
2027 | goto out_unlock; | |
2028 | } | |
2029 | ||
2030 | if (dev->class == ATA_DEV_ATA) { | |
2031 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
2032 | cmd->cmnd[0]); | |
2033 | ||
2034 | if (xlat_func) | |
2035 | ata_scsi_translate(ap, dev, cmd, done, xlat_func); | |
2036 | else | |
2037 | ata_scsi_simulate(dev->id, cmd, done); | |
2038 | } else | |
2039 | ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); | |
2040 | ||
2041 | out_unlock: | |
2042 | return 0; | |
2043 | } | |
2044 | ||
2045 | /** | |
2046 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
2047 | * @id: current IDENTIFY data for target device. | |
2048 | * @cmd: SCSI command being sent to device. | |
2049 | * @done: SCSI command completion function. | |
2050 | * | |
2051 | * Interprets and directly executes a select list of SCSI commands | |
2052 | * that can be handled internally. | |
2053 | * | |
2054 | * LOCKING: | |
2055 | * spin_lock_irqsave(host_set lock) | |
2056 | */ | |
2057 | ||
2058 | void ata_scsi_simulate(u16 *id, | |
2059 | struct scsi_cmnd *cmd, | |
2060 | void (*done)(struct scsi_cmnd *)) | |
2061 | { | |
2062 | struct ata_scsi_args args; | |
2063 | u8 *scsicmd = cmd->cmnd; | |
2064 | ||
2065 | args.id = id; | |
2066 | args.cmd = cmd; | |
2067 | args.done = done; | |
2068 | ||
2069 | switch(scsicmd[0]) { | |
2070 | /* no-op's, complete with success */ | |
2071 | case SYNCHRONIZE_CACHE: | |
2072 | case REZERO_UNIT: | |
2073 | case SEEK_6: | |
2074 | case SEEK_10: | |
2075 | case TEST_UNIT_READY: | |
2076 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2077 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2078 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2079 | break; | |
2080 | ||
2081 | case INQUIRY: | |
2082 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
2083 | ata_bad_cdb(cmd, done); | |
2084 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ | |
2085 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2086 | else if (scsicmd[2] == 0x00) | |
2087 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2088 | else if (scsicmd[2] == 0x80) | |
2089 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2090 | else if (scsicmd[2] == 0x83) | |
2091 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2092 | else | |
2093 | ata_bad_cdb(cmd, done); | |
2094 | break; | |
2095 | ||
2096 | case MODE_SENSE: | |
2097 | case MODE_SENSE_10: | |
2098 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2099 | break; | |
2100 | ||
2101 | case MODE_SELECT: /* unconditionally return */ | |
2102 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
2103 | ata_bad_cdb(cmd, done); | |
2104 | break; | |
2105 | ||
2106 | case READ_CAPACITY: | |
2107 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2108 | break; | |
2109 | ||
2110 | case SERVICE_ACTION_IN: | |
2111 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2112 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2113 | else | |
2114 | ata_bad_cdb(cmd, done); | |
2115 | break; | |
2116 | ||
2117 | case REPORT_LUNS: | |
2118 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2119 | break; | |
2120 | ||
b095518e | 2121 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2122 | case REQUEST_SENSE: |
2123 | ||
2124 | /* all other commands */ | |
2125 | default: | |
2126 | ata_bad_scsiop(cmd, done); | |
2127 | break; | |
2128 | } | |
2129 | } | |
2130 |