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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 | ||
057ace5e | 50 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); |
1da177e4 | 51 | static struct ata_device * |
057ace5e | 52 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); |
1da177e4 | 53 | |
00ac37f5 DG |
54 | #define RW_RECOVERY_MPAGE 0x1 |
55 | #define RW_RECOVERY_MPAGE_LEN 12 | |
56 | #define CACHE_MPAGE 0x8 | |
57 | #define CACHE_MPAGE_LEN 20 | |
58 | #define CONTROL_MPAGE 0xa | |
59 | #define CONTROL_MPAGE_LEN 12 | |
60 | #define ALL_MPAGES 0x3f | |
61 | #define ALL_SUB_MPAGES 0xff | |
62 | ||
63 | ||
64 | static const u8 def_rw_recovery_mpage[] = { | |
65 | RW_RECOVERY_MPAGE, | |
66 | RW_RECOVERY_MPAGE_LEN - 2, | |
67 | (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */ | |
68 | (1 << 6), /* ARRE (auto read reallocation) */ | |
69 | 0, /* read retry count */ | |
70 | 0, 0, 0, 0, | |
71 | 0, /* write retry count */ | |
72 | 0, 0, 0 | |
73 | }; | |
74 | ||
75 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
76 | CACHE_MPAGE, | |
77 | CACHE_MPAGE_LEN - 2, | |
78 | 0, /* contains WCE, needs to be 0 for logic */ | |
79 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
80 | 0, /* contains DRA, needs to be 0 for logic */ | |
81 | 0, 0, 0, 0, 0, 0, 0 | |
82 | }; | |
83 | ||
84 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
85 | CONTROL_MPAGE, | |
86 | CONTROL_MPAGE_LEN - 2, | |
87 | 2, /* DSENSE=0, GLTSD=1 */ | |
88 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
89 | 0, 0, 0, 0, 0xff, 0xff, | |
90 | 0, 30 /* extended self test time, see 05-359r1 */ | |
91 | }; | |
92 | ||
1da177e4 | 93 | |
ae006510 DG |
94 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
95 | void (*done)(struct scsi_cmnd *)) | |
96 | { | |
97 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
98 | /* "Invalid field in cbd" */ | |
99 | done(cmd); | |
100 | } | |
101 | ||
1da177e4 LT |
102 | /** |
103 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
104 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
105 | * @bdev: block device associated with @sdev | |
106 | * @capacity: capacity of SCSI device | |
107 | * @geom: location to which geometry will be output | |
108 | * | |
109 | * Generic bios head/sector/cylinder calculator | |
110 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
111 | * mapping. Some situations may arise where the disk is not | |
112 | * bootable if this is not used. | |
113 | * | |
114 | * LOCKING: | |
115 | * Defined by the SCSI layer. We don't really care. | |
116 | * | |
117 | * RETURNS: | |
118 | * Zero. | |
119 | */ | |
120 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
121 | sector_t capacity, int geom[]) | |
122 | { | |
123 | geom[0] = 255; | |
124 | geom[1] = 63; | |
125 | sector_div(capacity, 255*63); | |
126 | geom[2] = capacity; | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
b095518e JG |
131 | /** |
132 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
133 | * @dev: Device to whom we are issuing command | |
134 | * @arg: User provided data for issuing command | |
135 | * | |
136 | * LOCKING: | |
137 | * Defined by the SCSI layer. We don't really care. | |
138 | * | |
139 | * RETURNS: | |
140 | * Zero on success, negative errno on error. | |
141 | */ | |
142 | ||
143 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) | |
144 | { | |
145 | int rc = 0; | |
146 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
147 | u8 args[4], *argbuf = NULL; | |
148 | int argsize = 0; | |
149 | struct scsi_request *sreq; | |
150 | ||
151 | if (NULL == (void *)arg) | |
152 | return -EINVAL; | |
153 | ||
154 | if (copy_from_user(args, arg, sizeof(args))) | |
155 | return -EFAULT; | |
156 | ||
157 | sreq = scsi_allocate_request(scsidev, GFP_KERNEL); | |
158 | if (!sreq) | |
159 | return -EINTR; | |
160 | ||
161 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
162 | ||
163 | if (args[3]) { | |
164 | argsize = SECTOR_SIZE * args[3]; | |
165 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
54dac83c JR |
166 | if (argbuf == NULL) { |
167 | rc = -ENOMEM; | |
168 | goto error; | |
169 | } | |
b095518e JG |
170 | |
171 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
172 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
173 | block count in sector count field */ | |
174 | sreq->sr_data_direction = DMA_FROM_DEVICE; | |
175 | } else { | |
176 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
177 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
178 | sreq->sr_data_direction = DMA_NONE; | |
179 | } | |
180 | ||
181 | scsi_cmd[0] = ATA_16; | |
182 | ||
183 | scsi_cmd[4] = args[2]; | |
184 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
185 | scsi_cmd[6] = args[3]; | |
186 | scsi_cmd[8] = args[1]; | |
187 | scsi_cmd[10] = 0x4f; | |
188 | scsi_cmd[12] = 0xc2; | |
189 | } else { | |
190 | scsi_cmd[6] = args[1]; | |
191 | } | |
192 | scsi_cmd[14] = args[0]; | |
193 | ||
194 | /* Good values for timeout and retries? Values below | |
195 | from scsi_ioctl_send_command() for default case... */ | |
196 | scsi_wait_req(sreq, scsi_cmd, argbuf, argsize, (10*HZ), 5); | |
197 | ||
198 | if (sreq->sr_result) { | |
199 | rc = -EIO; | |
200 | goto error; | |
201 | } | |
202 | ||
203 | /* Need code to retrieve data from check condition? */ | |
204 | ||
205 | if ((argbuf) | |
206 | && copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize)) | |
207 | rc = -EFAULT; | |
208 | error: | |
209 | scsi_release_request(sreq); | |
210 | ||
211 | if (argbuf) | |
212 | kfree(argbuf); | |
213 | ||
214 | return rc; | |
215 | } | |
216 | ||
217 | /** | |
218 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
219 | * @dev: Device to whom we are issuing command | |
220 | * @arg: User provided data for issuing command | |
221 | * | |
222 | * LOCKING: | |
223 | * Defined by the SCSI layer. We don't really care. | |
224 | * | |
225 | * RETURNS: | |
226 | * Zero on success, negative errno on error. | |
227 | */ | |
228 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
229 | { | |
230 | int rc = 0; | |
231 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
232 | u8 args[7]; | |
233 | struct scsi_request *sreq; | |
234 | ||
235 | if (NULL == (void *)arg) | |
236 | return -EINVAL; | |
237 | ||
238 | if (copy_from_user(args, arg, sizeof(args))) | |
239 | return -EFAULT; | |
240 | ||
241 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
242 | scsi_cmd[0] = ATA_16; | |
243 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
244 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
245 | scsi_cmd[4] = args[1]; | |
246 | scsi_cmd[6] = args[2]; | |
247 | scsi_cmd[8] = args[3]; | |
248 | scsi_cmd[10] = args[4]; | |
249 | scsi_cmd[12] = args[5]; | |
250 | scsi_cmd[14] = args[0]; | |
251 | ||
252 | sreq = scsi_allocate_request(scsidev, GFP_KERNEL); | |
253 | if (!sreq) { | |
254 | rc = -EINTR; | |
255 | goto error; | |
256 | } | |
257 | ||
258 | sreq->sr_data_direction = DMA_NONE; | |
259 | /* Good values for timeout and retries? Values below | |
260 | from scsi_ioctl_send_command() for default case... */ | |
261 | scsi_wait_req(sreq, scsi_cmd, NULL, 0, (10*HZ), 5); | |
262 | ||
263 | if (sreq->sr_result) { | |
264 | rc = -EIO; | |
265 | goto error; | |
266 | } | |
267 | ||
268 | /* Need code to retrieve data from check condition? */ | |
269 | ||
270 | error: | |
271 | scsi_release_request(sreq); | |
272 | return rc; | |
273 | } | |
274 | ||
1da177e4 LT |
275 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
276 | { | |
277 | struct ata_port *ap; | |
278 | struct ata_device *dev; | |
279 | int val = -EINVAL, rc = -EINVAL; | |
280 | ||
281 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
282 | if (!ap) | |
283 | goto out; | |
284 | ||
285 | dev = ata_scsi_find_dev(ap, scsidev); | |
286 | if (!dev) { | |
287 | rc = -ENODEV; | |
288 | goto out; | |
289 | } | |
290 | ||
291 | switch (cmd) { | |
292 | case ATA_IOC_GET_IO32: | |
293 | val = 0; | |
294 | if (copy_to_user(arg, &val, 1)) | |
295 | return -EFAULT; | |
296 | return 0; | |
297 | ||
298 | case ATA_IOC_SET_IO32: | |
299 | val = (unsigned long) arg; | |
300 | if (val != 0) | |
301 | return -EINVAL; | |
302 | return 0; | |
303 | ||
b095518e JG |
304 | case HDIO_DRIVE_CMD: |
305 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
306 | return -EACCES; | |
307 | return ata_cmd_ioctl(scsidev, arg); | |
308 | ||
309 | case HDIO_DRIVE_TASK: | |
310 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
311 | return -EACCES; | |
312 | return ata_task_ioctl(scsidev, arg); | |
313 | ||
1da177e4 LT |
314 | default: |
315 | rc = -ENOTTY; | |
316 | break; | |
317 | } | |
318 | ||
319 | out: | |
320 | return rc; | |
321 | } | |
322 | ||
323 | /** | |
324 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
325 | * @ap: ATA port to which the new command is attached | |
326 | * @dev: ATA device to which the new command is attached | |
327 | * @cmd: SCSI command that originated this ATA command | |
328 | * @done: SCSI command completion function | |
329 | * | |
330 | * Obtain a reference to an unused ata_queued_cmd structure, | |
331 | * which is the basic libata structure representing a single | |
332 | * ATA command sent to the hardware. | |
333 | * | |
334 | * If a command was available, fill in the SCSI-specific | |
335 | * portions of the structure with information on the | |
336 | * current command. | |
337 | * | |
338 | * LOCKING: | |
339 | * spin_lock_irqsave(host_set lock) | |
340 | * | |
341 | * RETURNS: | |
342 | * Command allocated, or %NULL if none available. | |
343 | */ | |
344 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap, | |
345 | struct ata_device *dev, | |
346 | struct scsi_cmnd *cmd, | |
347 | void (*done)(struct scsi_cmnd *)) | |
348 | { | |
349 | struct ata_queued_cmd *qc; | |
350 | ||
351 | qc = ata_qc_new_init(ap, dev); | |
352 | if (qc) { | |
353 | qc->scsicmd = cmd; | |
354 | qc->scsidone = done; | |
355 | ||
356 | if (cmd->use_sg) { | |
357 | qc->sg = (struct scatterlist *) cmd->request_buffer; | |
358 | qc->n_elem = cmd->use_sg; | |
359 | } else { | |
360 | qc->sg = &qc->sgent; | |
361 | qc->n_elem = 1; | |
362 | } | |
363 | } else { | |
364 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
365 | done(cmd); | |
366 | } | |
367 | ||
368 | return qc; | |
369 | } | |
370 | ||
b095518e JG |
371 | /** |
372 | * ata_dump_status - user friendly display of error info | |
373 | * @id: id of the port in question | |
374 | * @tf: ptr to filled out taskfile | |
375 | * | |
376 | * Decode and dump the ATA error/status registers for the user so | |
377 | * that they have some idea what really happened at the non | |
378 | * make-believe layer. | |
379 | * | |
380 | * LOCKING: | |
381 | * inherited from caller | |
382 | */ | |
383 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
384 | { | |
385 | u8 stat = tf->command, err = tf->feature; | |
386 | ||
387 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
388 | if (stat & ATA_BUSY) { | |
389 | printk("Busy }\n"); /* Data is not valid in this case */ | |
390 | } else { | |
391 | if (stat & 0x40) printk("DriveReady "); | |
392 | if (stat & 0x20) printk("DeviceFault "); | |
393 | if (stat & 0x10) printk("SeekComplete "); | |
394 | if (stat & 0x08) printk("DataRequest "); | |
395 | if (stat & 0x04) printk("CorrectedError "); | |
396 | if (stat & 0x02) printk("Index "); | |
397 | if (stat & 0x01) printk("Error "); | |
398 | printk("}\n"); | |
399 | ||
400 | if (err) { | |
401 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
402 | if (err & 0x04) printk("DriveStatusError "); | |
403 | if (err & 0x80) { | |
404 | if (err & 0x04) printk("BadCRC "); | |
405 | else printk("Sector "); | |
406 | } | |
407 | if (err & 0x40) printk("UncorrectableError "); | |
408 | if (err & 0x10) printk("SectorIdNotFound "); | |
409 | if (err & 0x02) printk("TrackZeroNotFound "); | |
410 | if (err & 0x01) printk("AddrMarkNotFound "); | |
411 | printk("}\n"); | |
412 | } | |
413 | } | |
414 | } | |
415 | ||
1da177e4 LT |
416 | /** |
417 | * ata_to_sense_error - convert ATA error to SCSI error | |
1da177e4 | 418 | * @drv_stat: value contained in ATA status register |
b095518e JG |
419 | * @drv_err: value contained in ATA error register |
420 | * @sk: the sense key we'll fill out | |
421 | * @asc: the additional sense code we'll fill out | |
422 | * @ascq: the additional sense code qualifier we'll fill out | |
1da177e4 | 423 | * |
b095518e JG |
424 | * Converts an ATA error into a SCSI error. Fill out pointers to |
425 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
426 | * format sense blocks. | |
1da177e4 LT |
427 | * |
428 | * LOCKING: | |
429 | * spin_lock_irqsave(host_set lock) | |
430 | */ | |
b095518e JG |
431 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
432 | u8 *ascq) | |
1da177e4 | 433 | { |
b095518e | 434 | int i; |
ffe75ef6 | 435 | |
1da177e4 LT |
436 | /* Based on the 3ware driver translation table */ |
437 | static unsigned char sense_table[][4] = { | |
438 | /* BBD|ECC|ID|MAR */ | |
439 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
440 | /* BBD|ECC|ID */ | |
441 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
442 | /* ECC|MC|MARK */ | |
443 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
444 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
445 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
446 | /* MC|ID|ABRT|TRK0|MARK */ | |
447 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
448 | /* MCR|MARK */ | |
449 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
450 | /* Bad address mark */ | |
451 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
452 | /* TRK0 */ | |
453 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
454 | /* Abort & !ICRC */ | |
455 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
456 | /* Media change request */ | |
457 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
458 | /* SRV */ | |
459 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
460 | /* Media change */ | |
461 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
462 | /* ECC */ | |
463 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
464 | /* BBD - block marked bad */ | |
465 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
466 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
467 | }; | |
468 | static unsigned char stat_table[][4] = { | |
469 | /* Must be first because BUSY means no other bits valid */ | |
470 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
471 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
472 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
473 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
474 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
475 | }; | |
1da177e4 LT |
476 | |
477 | /* | |
478 | * Is this an error we can process/parse | |
479 | */ | |
b095518e JG |
480 | if (drv_stat & ATA_BUSY) { |
481 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 482 | } |
b095518e JG |
483 | |
484 | if (drv_err) { | |
485 | /* Look for drv_err */ | |
486 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
487 | /* Look for best matches first */ | |
488 | if ((sense_table[i][0] & drv_err) == | |
489 | sense_table[i][0]) { | |
490 | *sk = sense_table[i][1]; | |
491 | *asc = sense_table[i][2]; | |
492 | *ascq = sense_table[i][3]; | |
493 | goto translate_done; | |
494 | } | |
495 | } | |
496 | /* No immediate match */ | |
497 | printk(KERN_WARNING "ata%u: no sense translation for " | |
498 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 499 | } |
b095518e JG |
500 | |
501 | /* Fall back to interpreting status bits */ | |
502 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
503 | if (stat_table[i][0] & drv_stat) { | |
504 | *sk = stat_table[i][1]; | |
505 | *asc = stat_table[i][2]; | |
506 | *ascq = stat_table[i][3]; | |
507 | goto translate_done; | |
1da177e4 | 508 | } |
b095518e JG |
509 | } |
510 | /* No error? Undecoded? */ | |
511 | printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n", | |
512 | id, drv_stat); | |
513 | ||
514 | /* For our last chance pick, use medium read error because | |
515 | * it's much more common than an ATA drive telling you a write | |
516 | * has failed. | |
517 | */ | |
518 | *sk = MEDIUM_ERROR; | |
519 | *asc = 0x11; /* "unrecovered read error" */ | |
520 | *ascq = 0x04; /* "auto-reallocation failed" */ | |
521 | ||
522 | translate_done: | |
523 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to " | |
524 | "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err, | |
525 | *sk, *asc, *ascq); | |
526 | return; | |
527 | } | |
528 | ||
529 | /* | |
530 | * ata_gen_ata_desc_sense - Generate check condition sense block. | |
531 | * @qc: Command that completed. | |
532 | * | |
533 | * This function is specific to the ATA descriptor format sense | |
534 | * block specified for the ATA pass through commands. Regardless | |
535 | * of whether the command errored or not, return a sense | |
536 | * block. Copy all controller registers into the sense | |
537 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
538 | * | |
539 | * LOCKING: | |
540 | * spin_lock_irqsave(host_set lock) | |
541 | */ | |
542 | void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) | |
543 | { | |
544 | struct scsi_cmnd *cmd = qc->scsicmd; | |
545 | struct ata_taskfile *tf = &qc->tf; | |
546 | unsigned char *sb = cmd->sense_buffer; | |
547 | unsigned char *desc = sb + 8; | |
548 | ||
549 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
550 | ||
0e5dec47 | 551 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e JG |
552 | |
553 | /* | |
554 | * Read the controller registers. | |
555 | */ | |
556 | assert(NULL != qc->ap->ops->tf_read); | |
557 | qc->ap->ops->tf_read(qc->ap, tf); | |
1da177e4 | 558 | |
b095518e JG |
559 | /* |
560 | * Use ata_to_sense_error() to map status register bits | |
561 | * onto sense key, asc & ascq. | |
562 | */ | |
a7dac447 | 563 | if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { |
b095518e JG |
564 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
565 | &sb[1], &sb[2], &sb[3]); | |
566 | sb[1] &= 0x0f; | |
1da177e4 LT |
567 | } |
568 | ||
b095518e JG |
569 | /* |
570 | * Sense data is current and format is descriptor. | |
571 | */ | |
572 | sb[0] = 0x72; | |
1da177e4 | 573 | |
b095518e JG |
574 | desc[0] = 0x09; |
575 | ||
576 | /* | |
577 | * Set length of additional sense data. | |
578 | * Since we only populate descriptor 0, the total | |
579 | * length is the same (fixed) length as descriptor 0. | |
580 | */ | |
581 | desc[1] = sb[7] = 14; | |
582 | ||
583 | /* | |
584 | * Copy registers into sense buffer. | |
585 | */ | |
586 | desc[2] = 0x00; | |
587 | desc[3] = tf->feature; /* == error reg */ | |
588 | desc[5] = tf->nsect; | |
589 | desc[7] = tf->lbal; | |
590 | desc[9] = tf->lbam; | |
591 | desc[11] = tf->lbah; | |
592 | desc[12] = tf->device; | |
593 | desc[13] = tf->command; /* == status reg */ | |
594 | ||
595 | /* | |
596 | * Fill in Extend bit, and the high order bytes | |
597 | * if applicable. | |
598 | */ | |
599 | if (tf->flags & ATA_TFLAG_LBA48) { | |
600 | desc[2] |= 0x01; | |
601 | desc[4] = tf->hob_nsect; | |
602 | desc[6] = tf->hob_lbal; | |
603 | desc[8] = tf->hob_lbam; | |
604 | desc[10] = tf->hob_lbah; | |
1da177e4 | 605 | } |
b095518e | 606 | } |
1da177e4 | 607 | |
b095518e JG |
608 | /** |
609 | * ata_gen_fixed_sense - generate a SCSI fixed sense block | |
610 | * @qc: Command that we are erroring out | |
611 | * | |
612 | * Leverage ata_to_sense_error() to give us the codes. Fit our | |
613 | * LBA in here if there's room. | |
614 | * | |
615 | * LOCKING: | |
616 | * inherited from caller | |
617 | */ | |
618 | void ata_gen_fixed_sense(struct ata_queued_cmd *qc) | |
619 | { | |
620 | struct scsi_cmnd *cmd = qc->scsicmd; | |
621 | struct ata_taskfile *tf = &qc->tf; | |
622 | unsigned char *sb = cmd->sense_buffer; | |
623 | ||
624 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
625 | ||
0e5dec47 | 626 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e JG |
627 | |
628 | /* | |
629 | * Read the controller registers. | |
630 | */ | |
631 | assert(NULL != qc->ap->ops->tf_read); | |
632 | qc->ap->ops->tf_read(qc->ap, tf); | |
633 | ||
634 | /* | |
635 | * Use ata_to_sense_error() to map status register bits | |
636 | * onto sense key, asc & ascq. | |
637 | */ | |
a7dac447 | 638 | if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { |
b095518e JG |
639 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
640 | &sb[2], &sb[12], &sb[13]); | |
641 | sb[2] &= 0x0f; | |
1da177e4 | 642 | } |
1da177e4 LT |
643 | |
644 | sb[0] = 0x70; | |
b095518e | 645 | sb[7] = 0x0a; |
0274aa25 | 646 | |
a7dac447 JG |
647 | if (tf->flags & ATA_TFLAG_LBA48) { |
648 | /* TODO: find solution for LBA48 descriptors */ | |
649 | } | |
650 | ||
651 | else if (tf->flags & ATA_TFLAG_LBA) { | |
b095518e JG |
652 | /* A small (28b) LBA will fit in the 32b info field */ |
653 | sb[0] |= 0x80; /* set valid bit */ | |
654 | sb[3] = tf->device & 0x0f; | |
655 | sb[4] = tf->lbah; | |
656 | sb[5] = tf->lbam; | |
657 | sb[6] = tf->lbal; | |
1da177e4 | 658 | } |
a7dac447 JG |
659 | |
660 | else { | |
661 | /* TODO: C/H/S */ | |
662 | } | |
1da177e4 LT |
663 | } |
664 | ||
665 | /** | |
666 | * ata_scsi_slave_config - Set SCSI device attributes | |
667 | * @sdev: SCSI device to examine | |
668 | * | |
669 | * This is called before we actually start reading | |
670 | * and writing to the device, to configure certain | |
671 | * SCSI mid-layer behaviors. | |
672 | * | |
673 | * LOCKING: | |
674 | * Defined by SCSI layer. We don't really care. | |
675 | */ | |
676 | ||
677 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
678 | { | |
679 | sdev->use_10_for_rw = 1; | |
680 | sdev->use_10_for_ms = 1; | |
681 | ||
682 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
683 | ||
684 | if (sdev->id < ATA_MAX_DEVICES) { | |
685 | struct ata_port *ap; | |
686 | struct ata_device *dev; | |
687 | ||
688 | ap = (struct ata_port *) &sdev->host->hostdata[0]; | |
689 | dev = &ap->device[sdev->id]; | |
690 | ||
691 | /* TODO: 1024 is an arbitrary number, not the | |
692 | * hardware maximum. This should be increased to | |
693 | * 65534 when Jens Axboe's patch for dynamically | |
694 | * determining max_sectors is merged. | |
695 | */ | |
696 | if ((dev->flags & ATA_DFLAG_LBA48) && | |
697 | ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) { | |
f85bdb9c JL |
698 | /* |
699 | * do not overwrite sdev->host->max_sectors, since | |
700 | * other drives on this host may not support LBA48 | |
701 | */ | |
1da177e4 LT |
702 | blk_queue_max_sectors(sdev->request_queue, 2048); |
703 | } | |
704 | } | |
705 | ||
706 | return 0; /* scsi layer doesn't check return value, sigh */ | |
707 | } | |
708 | ||
709 | /** | |
710 | * ata_scsi_error - SCSI layer error handler callback | |
711 | * @host: SCSI host on which error occurred | |
712 | * | |
713 | * Handles SCSI-layer-thrown error events. | |
714 | * | |
715 | * LOCKING: | |
716 | * Inherited from SCSI layer (none, can sleep) | |
717 | * | |
718 | * RETURNS: | |
719 | * Zero. | |
720 | */ | |
721 | ||
722 | int ata_scsi_error(struct Scsi_Host *host) | |
723 | { | |
724 | struct ata_port *ap; | |
725 | ||
726 | DPRINTK("ENTER\n"); | |
727 | ||
728 | ap = (struct ata_port *) &host->hostdata[0]; | |
729 | ap->ops->eng_timeout(ap); | |
730 | ||
731 | /* TODO: this is per-command; when queueing is supported | |
732 | * this code will either change or move to a more | |
733 | * appropriate place | |
734 | */ | |
735 | host->host_failed--; | |
42517438 | 736 | INIT_LIST_HEAD(&host->eh_cmd_q); |
1da177e4 LT |
737 | |
738 | DPRINTK("EXIT\n"); | |
739 | return 0; | |
740 | } | |
741 | ||
972dcafb DG |
742 | /** |
743 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
744 | * @qc: Storage for translated ATA taskfile | |
745 | * @scsicmd: SCSI command to translate | |
746 | * | |
747 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
748 | * (to start). Perhaps these commands should be preceded by | |
749 | * CHECK POWER MODE to see what power mode the device is already in. | |
750 | * [See SAT revision 5 at www.t10.org] | |
751 | * | |
752 | * LOCKING: | |
753 | * spin_lock_irqsave(host_set lock) | |
754 | * | |
755 | * RETURNS: | |
756 | * Zero on success, non-zero on error. | |
757 | */ | |
758 | ||
759 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, | |
057ace5e | 760 | const u8 *scsicmd) |
972dcafb DG |
761 | { |
762 | struct ata_taskfile *tf = &qc->tf; | |
763 | ||
764 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
765 | tf->protocol = ATA_PROT_NODATA; | |
766 | if (scsicmd[1] & 0x1) { | |
767 | ; /* ignore IMMED bit, violates sat-r05 */ | |
768 | } | |
769 | if (scsicmd[4] & 0x2) | |
ae006510 | 770 | goto invalid_fld; /* LOEJ bit set not supported */ |
972dcafb | 771 | if (((scsicmd[4] >> 4) & 0xf) != 0) |
ae006510 | 772 | goto invalid_fld; /* power conditions not supported */ |
972dcafb DG |
773 | if (scsicmd[4] & 0x1) { |
774 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
9d5b1302 AL |
775 | |
776 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
777 | qc->tf.flags |= ATA_TFLAG_LBA; | |
778 | ||
779 | tf->lbah = 0x0; | |
780 | tf->lbam = 0x0; | |
781 | tf->lbal = 0x0; | |
782 | tf->device |= ATA_LBA; | |
783 | } else { | |
784 | /* CHS */ | |
785 | tf->lbal = 0x1; /* sect */ | |
786 | tf->lbam = 0x0; /* cyl low */ | |
787 | tf->lbah = 0x0; /* cyl high */ | |
788 | } | |
789 | ||
972dcafb DG |
790 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
791 | } else { | |
792 | tf->nsect = 0; /* time period value (0 implies now) */ | |
793 | tf->command = ATA_CMD_STANDBY; | |
794 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
795 | } | |
796 | /* | |
797 | * Standby and Idle condition timers could be implemented but that | |
798 | * would require libata to implement the Power condition mode page | |
799 | * and allow the user to change it. Changing mode pages requires | |
800 | * MODE SELECT to be implemented. | |
801 | */ | |
802 | ||
803 | return 0; | |
ae006510 DG |
804 | |
805 | invalid_fld: | |
806 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
807 | /* "Invalid field in cbd" */ | |
808 | return 1; | |
972dcafb DG |
809 | } |
810 | ||
811 | ||
1da177e4 LT |
812 | /** |
813 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
814 | * @qc: Storage for translated ATA taskfile | |
815 | * @scsicmd: SCSI command to translate (ignored) | |
816 | * | |
817 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
818 | * FLUSH CACHE EXT. | |
819 | * | |
820 | * LOCKING: | |
821 | * spin_lock_irqsave(host_set lock) | |
822 | * | |
823 | * RETURNS: | |
824 | * Zero on success, non-zero on error. | |
825 | */ | |
826 | ||
057ace5e | 827 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
828 | { |
829 | struct ata_taskfile *tf = &qc->tf; | |
830 | ||
831 | tf->flags |= ATA_TFLAG_DEVICE; | |
832 | tf->protocol = ATA_PROT_NODATA; | |
833 | ||
07506697 | 834 | if ((qc->dev->flags & ATA_DFLAG_LBA48) && |
1da177e4 LT |
835 | (ata_id_has_flush_ext(qc->dev->id))) |
836 | tf->command = ATA_CMD_FLUSH_EXT; | |
837 | else | |
838 | tf->command = ATA_CMD_FLUSH; | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
3aef5231 AL |
843 | /** |
844 | * scsi_6_lba_len - Get LBA and transfer length | |
845 | * @scsicmd: SCSI command to translate | |
846 | * | |
847 | * Calculate LBA and transfer length for 6-byte commands. | |
848 | * | |
849 | * RETURNS: | |
850 | * @plba: the LBA | |
851 | * @plen: the transfer length | |
852 | */ | |
853 | ||
057ace5e | 854 | static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
855 | { |
856 | u64 lba = 0; | |
857 | u32 len = 0; | |
858 | ||
859 | VPRINTK("six-byte command\n"); | |
860 | ||
861 | lba |= ((u64)scsicmd[2]) << 8; | |
862 | lba |= ((u64)scsicmd[3]); | |
863 | ||
864 | len |= ((u32)scsicmd[4]); | |
865 | ||
866 | *plba = lba; | |
867 | *plen = len; | |
868 | } | |
869 | ||
870 | /** | |
871 | * scsi_10_lba_len - Get LBA and transfer length | |
872 | * @scsicmd: SCSI command to translate | |
873 | * | |
874 | * Calculate LBA and transfer length for 10-byte commands. | |
875 | * | |
876 | * RETURNS: | |
877 | * @plba: the LBA | |
878 | * @plen: the transfer length | |
879 | */ | |
880 | ||
057ace5e | 881 | static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
882 | { |
883 | u64 lba = 0; | |
884 | u32 len = 0; | |
885 | ||
886 | VPRINTK("ten-byte command\n"); | |
887 | ||
888 | lba |= ((u64)scsicmd[2]) << 24; | |
889 | lba |= ((u64)scsicmd[3]) << 16; | |
890 | lba |= ((u64)scsicmd[4]) << 8; | |
891 | lba |= ((u64)scsicmd[5]); | |
892 | ||
893 | len |= ((u32)scsicmd[7]) << 8; | |
894 | len |= ((u32)scsicmd[8]); | |
895 | ||
896 | *plba = lba; | |
897 | *plen = len; | |
898 | } | |
899 | ||
900 | /** | |
901 | * scsi_16_lba_len - Get LBA and transfer length | |
902 | * @scsicmd: SCSI command to translate | |
903 | * | |
904 | * Calculate LBA and transfer length for 16-byte commands. | |
905 | * | |
906 | * RETURNS: | |
907 | * @plba: the LBA | |
908 | * @plen: the transfer length | |
909 | */ | |
910 | ||
057ace5e | 911 | static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
912 | { |
913 | u64 lba = 0; | |
914 | u32 len = 0; | |
915 | ||
916 | VPRINTK("sixteen-byte command\n"); | |
917 | ||
918 | lba |= ((u64)scsicmd[2]) << 56; | |
919 | lba |= ((u64)scsicmd[3]) << 48; | |
920 | lba |= ((u64)scsicmd[4]) << 40; | |
921 | lba |= ((u64)scsicmd[5]) << 32; | |
922 | lba |= ((u64)scsicmd[6]) << 24; | |
923 | lba |= ((u64)scsicmd[7]) << 16; | |
924 | lba |= ((u64)scsicmd[8]) << 8; | |
925 | lba |= ((u64)scsicmd[9]); | |
926 | ||
927 | len |= ((u32)scsicmd[10]) << 24; | |
928 | len |= ((u32)scsicmd[11]) << 16; | |
929 | len |= ((u32)scsicmd[12]) << 8; | |
930 | len |= ((u32)scsicmd[13]); | |
931 | ||
932 | *plba = lba; | |
933 | *plen = len; | |
934 | } | |
935 | ||
1da177e4 LT |
936 | /** |
937 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
938 | * @qc: Storage for translated ATA taskfile | |
939 | * @scsicmd: SCSI command to translate | |
940 | * | |
941 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
942 | * | |
943 | * LOCKING: | |
944 | * spin_lock_irqsave(host_set lock) | |
945 | * | |
946 | * RETURNS: | |
947 | * Zero on success, non-zero on error. | |
948 | */ | |
949 | ||
057ace5e | 950 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
951 | { |
952 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece | 953 | struct ata_device *dev = qc->dev; |
1da177e4 | 954 | u64 dev_sectors = qc->dev->n_sectors; |
3aef5231 AL |
955 | u64 block; |
956 | u32 n_block; | |
1da177e4 LT |
957 | |
958 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
959 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 960 | |
3aef5231 AL |
961 | if (scsicmd[0] == VERIFY) |
962 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
963 | else if (scsicmd[0] == VERIFY_16) | |
964 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1da177e4 | 965 | else |
ae006510 | 966 | goto invalid_fld; |
1da177e4 | 967 | |
8bf62ece | 968 | if (!n_block) |
ae006510 | 969 | goto nothing_to_do; |
8bf62ece | 970 | if (block >= dev_sectors) |
ae006510 | 971 | goto out_of_range; |
8bf62ece | 972 | if ((block + n_block) > dev_sectors) |
ae006510 | 973 | goto out_of_range; |
1da177e4 | 974 | |
07506697 AL |
975 | if (dev->flags & ATA_DFLAG_LBA) { |
976 | tf->flags |= ATA_TFLAG_LBA; | |
977 | ||
978 | if (dev->flags & ATA_DFLAG_LBA48) { | |
979 | if (n_block > (64 * 1024)) | |
980 | goto invalid_fld; | |
981 | ||
982 | /* use LBA48 */ | |
983 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 984 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 985 | |
8bf62ece | 986 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 987 | |
8bf62ece AL |
988 | tf->hob_lbah = (block >> 40) & 0xff; |
989 | tf->hob_lbam = (block >> 32) & 0xff; | |
990 | tf->hob_lbal = (block >> 24) & 0xff; | |
991 | } else { | |
07506697 AL |
992 | if (n_block > 256) |
993 | goto invalid_fld; | |
994 | ||
995 | /* use LBA28 */ | |
8bf62ece | 996 | tf->command = ATA_CMD_VERIFY; |
1da177e4 | 997 | |
8bf62ece AL |
998 | tf->device |= (block >> 24) & 0xf; |
999 | } | |
1000 | ||
1001 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1002 | |
8bf62ece AL |
1003 | tf->lbah = (block >> 16) & 0xff; |
1004 | tf->lbam = (block >> 8) & 0xff; | |
1005 | tf->lbal = block & 0xff; | |
1da177e4 | 1006 | |
8bf62ece | 1007 | tf->device |= ATA_LBA; |
1da177e4 | 1008 | } else { |
8bf62ece AL |
1009 | /* CHS */ |
1010 | u32 sect, head, cyl, track; | |
1011 | ||
07506697 AL |
1012 | if (n_block > 256) |
1013 | goto invalid_fld; | |
1014 | ||
8bf62ece AL |
1015 | /* Convert LBA to CHS */ |
1016 | track = (u32)block / dev->sectors; | |
1017 | cyl = track / dev->heads; | |
1018 | head = track % dev->heads; | |
1019 | sect = (u32)block % dev->sectors + 1; | |
1020 | ||
c187c4b5 AL |
1021 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1022 | (u32)block, track, cyl, head, sect); | |
8bf62ece AL |
1023 | |
1024 | /* Check whether the converted CHS can fit. | |
1025 | Cylinder: 0-65535 | |
1026 | Head: 0-15 | |
1027 | Sector: 1-255*/ | |
1028 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
ae006510 | 1029 | goto out_of_range; |
8bf62ece | 1030 | |
1da177e4 | 1031 | tf->command = ATA_CMD_VERIFY; |
8bf62ece AL |
1032 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
1033 | tf->lbal = sect; | |
1034 | tf->lbam = cyl; | |
1035 | tf->lbah = cyl >> 8; | |
1036 | tf->device |= head; | |
1da177e4 LT |
1037 | } |
1038 | ||
1da177e4 | 1039 | return 0; |
ae006510 DG |
1040 | |
1041 | invalid_fld: | |
1042 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1043 | /* "Invalid field in cbd" */ | |
1044 | return 1; | |
1da177e4 | 1045 | |
ae006510 DG |
1046 | out_of_range: |
1047 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1048 | /* "Logical Block Address out of range" */ | |
1049 | return 1; | |
1da177e4 | 1050 | |
ae006510 DG |
1051 | nothing_to_do: |
1052 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1053 | return 1; | |
1da177e4 LT |
1054 | } |
1055 | ||
1056 | /** | |
1057 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1058 | * @qc: Storage for translated ATA taskfile | |
1059 | * @scsicmd: SCSI command to translate | |
1060 | * | |
1061 | * Converts any of six SCSI read/write commands into the | |
1062 | * ATA counterpart, including starting sector (LBA), | |
1063 | * sector count, and taking into account the device's LBA48 | |
1064 | * support. | |
1065 | * | |
1066 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1067 | * %WRITE_16 are currently supported. | |
1068 | * | |
1069 | * LOCKING: | |
1070 | * spin_lock_irqsave(host_set lock) | |
1071 | * | |
1072 | * RETURNS: | |
1073 | * Zero on success, non-zero on error. | |
1074 | */ | |
1075 | ||
057ace5e | 1076 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
1077 | { |
1078 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece | 1079 | struct ata_device *dev = qc->dev; |
3aef5231 AL |
1080 | u64 block; |
1081 | u32 n_block; | |
1da177e4 LT |
1082 | |
1083 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1da177e4 | 1084 | |
8cbd6df1 AL |
1085 | if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || |
1086 | scsicmd[0] == WRITE_16) | |
1da177e4 | 1087 | tf->flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1088 | |
8bf62ece | 1089 | /* Calculate the SCSI LBA and transfer length. */ |
3aef5231 AL |
1090 | switch (scsicmd[0]) { |
1091 | case READ_10: | |
1092 | case WRITE_10: | |
1093 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
1094 | break; | |
1095 | case READ_6: | |
1096 | case WRITE_6: | |
1097 | scsi_6_lba_len(scsicmd, &block, &n_block); | |
1da177e4 | 1098 | |
c187c4b5 AL |
1099 | /* for 6-byte r/w commands, transfer length 0 |
1100 | * means 256 blocks of data, not 0 block. | |
1101 | */ | |
76b2bf9b JG |
1102 | if (!n_block) |
1103 | n_block = 256; | |
3aef5231 AL |
1104 | break; |
1105 | case READ_16: | |
1106 | case WRITE_16: | |
1107 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1108 | break; | |
1109 | default: | |
8bf62ece | 1110 | DPRINTK("no-byte command\n"); |
ae006510 | 1111 | goto invalid_fld; |
1da177e4 | 1112 | } |
1da177e4 | 1113 | |
8bf62ece AL |
1114 | /* Check and compose ATA command */ |
1115 | if (!n_block) | |
c187c4b5 AL |
1116 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1117 | * length 0 means transfer 0 block of data. | |
1118 | * However, for ATA R/W commands, sector count 0 means | |
1119 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
1120 | */ | |
ae006510 | 1121 | goto nothing_to_do; |
1da177e4 | 1122 | |
07506697 AL |
1123 | if (dev->flags & ATA_DFLAG_LBA) { |
1124 | tf->flags |= ATA_TFLAG_LBA; | |
1125 | ||
1126 | if (dev->flags & ATA_DFLAG_LBA48) { | |
8bf62ece AL |
1127 | /* The request -may- be too large for LBA48. */ |
1128 | if ((block >> 48) || (n_block > 65536)) | |
ae006510 | 1129 | goto out_of_range; |
1da177e4 | 1130 | |
07506697 AL |
1131 | /* use LBA48 */ |
1132 | tf->flags |= ATA_TFLAG_LBA48; | |
1133 | ||
8bf62ece | 1134 | tf->hob_nsect = (n_block >> 8) & 0xff; |
13593265 | 1135 | |
8bf62ece AL |
1136 | tf->hob_lbah = (block >> 40) & 0xff; |
1137 | tf->hob_lbam = (block >> 32) & 0xff; | |
1138 | tf->hob_lbal = (block >> 24) & 0xff; | |
1139 | } else { | |
07506697 | 1140 | /* use LBA28 */ |
1da177e4 | 1141 | |
8bf62ece AL |
1142 | /* The request -may- be too large for LBA28. */ |
1143 | if ((block >> 28) || (n_block > 256)) | |
ae006510 | 1144 | goto out_of_range; |
1da177e4 | 1145 | |
8bf62ece | 1146 | tf->device |= (block >> 24) & 0xf; |
1da177e4 | 1147 | } |
1da177e4 | 1148 | |
8cbd6df1 AL |
1149 | ata_rwcmd_protocol(qc); |
1150 | ||
8bf62ece AL |
1151 | qc->nsect = n_block; |
1152 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1153 | |
8bf62ece AL |
1154 | tf->lbah = (block >> 16) & 0xff; |
1155 | tf->lbam = (block >> 8) & 0xff; | |
1156 | tf->lbal = block & 0xff; | |
1da177e4 | 1157 | |
8bf62ece AL |
1158 | tf->device |= ATA_LBA; |
1159 | } else { | |
1160 | /* CHS */ | |
1161 | u32 sect, head, cyl, track; | |
1162 | ||
1163 | /* The request -may- be too large for CHS addressing. */ | |
1164 | if ((block >> 28) || (n_block > 256)) | |
ae006510 | 1165 | goto out_of_range; |
c187c4b5 | 1166 | |
8cbd6df1 AL |
1167 | ata_rwcmd_protocol(qc); |
1168 | ||
8bf62ece AL |
1169 | /* Convert LBA to CHS */ |
1170 | track = (u32)block / dev->sectors; | |
1171 | cyl = track / dev->heads; | |
1172 | head = track % dev->heads; | |
1173 | sect = (u32)block % dev->sectors + 1; | |
1174 | ||
c187c4b5 | 1175 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
8bf62ece | 1176 | (u32)block, track, cyl, head, sect); |
c187c4b5 | 1177 | |
8bf62ece AL |
1178 | /* Check whether the converted CHS can fit. |
1179 | Cylinder: 0-65535 | |
1180 | Head: 0-15 | |
1181 | Sector: 1-255*/ | |
c187c4b5 | 1182 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1183 | goto out_of_range; |
c187c4b5 | 1184 | |
8bf62ece AL |
1185 | qc->nsect = n_block; |
1186 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1187 | tf->lbal = sect; | |
1188 | tf->lbam = cyl; | |
1189 | tf->lbah = cyl >> 8; | |
1190 | tf->device |= head; | |
1da177e4 | 1191 | } |
1da177e4 | 1192 | |
8bf62ece | 1193 | return 0; |
1da177e4 | 1194 | |
ae006510 DG |
1195 | invalid_fld: |
1196 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1197 | /* "Invalid field in cbd" */ | |
1198 | return 1; | |
1da177e4 | 1199 | |
ae006510 DG |
1200 | out_of_range: |
1201 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1202 | /* "Logical Block Address out of range" */ | |
1203 | return 1; | |
1da177e4 | 1204 | |
ae006510 DG |
1205 | nothing_to_do: |
1206 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1da177e4 LT |
1207 | return 1; |
1208 | } | |
1209 | ||
a7dac447 JG |
1210 | static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, |
1211 | unsigned int err_mask) | |
1da177e4 LT |
1212 | { |
1213 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a7dac447 JG |
1214 | u8 *cdb = cmd->cmnd; |
1215 | int need_sense = (err_mask != 0); | |
b095518e JG |
1216 | |
1217 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1218 | * user mandated it or if there's an error. Note that if we | |
1219 | * generate because the user forced us to, a check condition | |
1220 | * is generated and the ATA register values are returned | |
1221 | * whether the command completed successfully or not. If there | |
1222 | * was no error, SK, ASC and ASCQ will all be zero. | |
1223 | */ | |
a7dac447 JG |
1224 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
1225 | ((cdb[2] & 0x20) || need_sense)) { | |
b095518e JG |
1226 | ata_gen_ata_desc_sense(qc); |
1227 | } else { | |
1228 | if (!need_sense) { | |
1229 | cmd->result = SAM_STAT_GOOD; | |
1230 | } else { | |
1231 | /* TODO: decide which descriptor format to use | |
1232 | * for 48b LBA devices and call that here | |
1233 | * instead of the fixed desc, which is only | |
1234 | * good for smaller LBA (and maybe CHS?) | |
1235 | * devices. | |
1236 | */ | |
1237 | ata_gen_fixed_sense(qc); | |
1238 | } | |
1239 | } | |
1da177e4 | 1240 | |
b095518e JG |
1241 | if (need_sense) { |
1242 | /* The ata_gen_..._sense routines fill in tf */ | |
1243 | ata_dump_status(qc->ap->id, &qc->tf); | |
1244 | } | |
1da177e4 LT |
1245 | |
1246 | qc->scsidone(cmd); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | /** | |
1252 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1253 | * @ap: ATA port to which the command is addressed | |
1254 | * @dev: ATA device to which the command is addressed | |
1255 | * @cmd: SCSI command to execute | |
1256 | * @done: SCSI command completion function | |
1257 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1258 | * | |
1259 | * Our ->queuecommand() function has decided that the SCSI | |
1260 | * command issued can be directly translated into an ATA | |
1261 | * command, rather than handled internally. | |
1262 | * | |
1263 | * This function sets up an ata_queued_cmd structure for the | |
1264 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1265 | * | |
ae006510 DG |
1266 | * The xlat_func argument (actor) returns 0 if ready to execute |
1267 | * ATA command, else 1 to finish translation. If 1 is returned | |
1268 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1269 | * to be set reflecting an error condition or clean (early) | |
1270 | * termination. | |
1271 | * | |
1da177e4 LT |
1272 | * LOCKING: |
1273 | * spin_lock_irqsave(host_set lock) | |
1274 | */ | |
1275 | ||
1276 | static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, | |
1277 | struct scsi_cmnd *cmd, | |
1278 | void (*done)(struct scsi_cmnd *), | |
1279 | ata_xlat_func_t xlat_func) | |
1280 | { | |
1281 | struct ata_queued_cmd *qc; | |
1282 | u8 *scsicmd = cmd->cmnd; | |
1283 | ||
1284 | VPRINTK("ENTER\n"); | |
1285 | ||
1286 | qc = ata_scsi_qc_new(ap, dev, cmd, done); | |
1287 | if (!qc) | |
ae006510 | 1288 | goto err_mem; |
1da177e4 LT |
1289 | |
1290 | /* data is present; dma-map it */ | |
0274aa25 JG |
1291 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1292 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 LT |
1293 | if (unlikely(cmd->request_bufflen < 1)) { |
1294 | printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", | |
1295 | ap->id, dev->devno); | |
ae006510 | 1296 | goto err_did; |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | if (cmd->use_sg) | |
1300 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1301 | else | |
1302 | ata_sg_init_one(qc, cmd->request_buffer, | |
1303 | cmd->request_bufflen); | |
1304 | ||
1305 | qc->dma_dir = cmd->sc_data_direction; | |
1306 | } | |
1307 | ||
1308 | qc->complete_fn = ata_scsi_qc_complete; | |
1309 | ||
1310 | if (xlat_func(qc, scsicmd)) | |
ae006510 | 1311 | goto early_finish; |
1da177e4 LT |
1312 | |
1313 | /* select device, send command to hardware */ | |
1314 | if (ata_qc_issue(qc)) | |
ae006510 | 1315 | goto err_did; |
1da177e4 LT |
1316 | |
1317 | VPRINTK("EXIT\n"); | |
1318 | return; | |
1319 | ||
ae006510 DG |
1320 | early_finish: |
1321 | ata_qc_free(qc); | |
1322 | done(cmd); | |
1323 | DPRINTK("EXIT - early finish (good or error)\n"); | |
1324 | return; | |
1325 | ||
1326 | err_did: | |
1da177e4 | 1327 | ata_qc_free(qc); |
ae006510 DG |
1328 | err_mem: |
1329 | cmd->result = (DID_ERROR << 16); | |
1330 | done(cmd); | |
1331 | DPRINTK("EXIT - internal\n"); | |
1332 | return; | |
1da177e4 LT |
1333 | } |
1334 | ||
1335 | /** | |
1336 | * ata_scsi_rbuf_get - Map response buffer. | |
1337 | * @cmd: SCSI command containing buffer to be mapped. | |
1338 | * @buf_out: Pointer to mapped area. | |
1339 | * | |
1340 | * Maps buffer contained within SCSI command @cmd. | |
1341 | * | |
1342 | * LOCKING: | |
1343 | * spin_lock_irqsave(host_set lock) | |
1344 | * | |
1345 | * RETURNS: | |
1346 | * Length of response buffer. | |
1347 | */ | |
1348 | ||
1349 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1350 | { | |
1351 | u8 *buf; | |
1352 | unsigned int buflen; | |
1353 | ||
1354 | if (cmd->use_sg) { | |
1355 | struct scatterlist *sg; | |
1356 | ||
1357 | sg = (struct scatterlist *) cmd->request_buffer; | |
1358 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
1359 | buflen = sg->length; | |
1360 | } else { | |
1361 | buf = cmd->request_buffer; | |
1362 | buflen = cmd->request_bufflen; | |
1363 | } | |
1364 | ||
1365 | *buf_out = buf; | |
1366 | return buflen; | |
1367 | } | |
1368 | ||
1369 | /** | |
1370 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1371 | * @cmd: SCSI command containing buffer to be unmapped. | |
1372 | * @buf: buffer to unmap | |
1373 | * | |
1374 | * Unmaps response buffer contained within @cmd. | |
1375 | * | |
1376 | * LOCKING: | |
1377 | * spin_lock_irqsave(host_set lock) | |
1378 | */ | |
1379 | ||
1380 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1381 | { | |
1382 | if (cmd->use_sg) { | |
1383 | struct scatterlist *sg; | |
1384 | ||
1385 | sg = (struct scatterlist *) cmd->request_buffer; | |
1386 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | /** | |
1391 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1392 | * @args: device IDENTIFY data / SCSI command of interest. | |
1393 | * @actor: Callback hook for desired SCSI command simulator | |
1394 | * | |
1395 | * Takes care of the hard work of simulating a SCSI command... | |
1396 | * Mapping the response buffer, calling the command's handler, | |
1397 | * and handling the handler's return value. This return value | |
1398 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1399 | * completed successfully (0), or not (in which case cmd->result |
1400 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1401 | * |
1402 | * LOCKING: | |
1403 | * spin_lock_irqsave(host_set lock) | |
1404 | */ | |
1405 | ||
1406 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1407 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1408 | u8 *rbuf, unsigned int buflen)) | |
1409 | { | |
1410 | u8 *rbuf; | |
1411 | unsigned int buflen, rc; | |
1412 | struct scsi_cmnd *cmd = args->cmd; | |
1413 | ||
1414 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1415 | memset(rbuf, 0, buflen); | |
1416 | rc = actor(args, rbuf, buflen); | |
1417 | ata_scsi_rbuf_put(cmd, rbuf); | |
1418 | ||
ae006510 | 1419 | if (rc == 0) |
1da177e4 | 1420 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1421 | args->done(cmd); |
1da177e4 LT |
1422 | } |
1423 | ||
1424 | /** | |
1425 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1426 | * @args: device IDENTIFY data / SCSI command of interest. | |
1427 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1428 | * @buflen: Response buffer length. | |
1429 | * | |
1430 | * Returns standard device identification data associated | |
1431 | * with non-EVPD INQUIRY command output. | |
1432 | * | |
1433 | * LOCKING: | |
1434 | * spin_lock_irqsave(host_set lock) | |
1435 | */ | |
1436 | ||
1437 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1438 | unsigned int buflen) | |
1439 | { | |
1440 | u8 hdr[] = { | |
1441 | TYPE_DISK, | |
1442 | 0, | |
1443 | 0x5, /* claim SPC-3 version compatibility */ | |
1444 | 2, | |
1445 | 95 - 4 | |
1446 | }; | |
1447 | ||
1448 | /* set scsi removeable (RMB) bit per ata bit */ | |
1449 | if (ata_id_removeable(args->id)) | |
1450 | hdr[1] |= (1 << 7); | |
1451 | ||
1452 | VPRINTK("ENTER\n"); | |
1453 | ||
1454 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1455 | ||
1456 | if (buflen > 35) { | |
1457 | memcpy(&rbuf[8], "ATA ", 8); | |
1458 | ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); | |
1459 | ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1460 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1461 | memcpy(&rbuf[32], "n/a ", 4); | |
1462 | } | |
1463 | ||
1464 | if (buflen > 63) { | |
1465 | const u8 versions[] = { | |
1466 | 0x60, /* SAM-3 (no version claimed) */ | |
1467 | ||
1468 | 0x03, | |
1469 | 0x20, /* SBC-2 (no version claimed) */ | |
1470 | ||
1471 | 0x02, | |
1472 | 0x60 /* SPC-3 (no version claimed) */ | |
1473 | }; | |
1474 | ||
1475 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1476 | } | |
1477 | ||
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | /** | |
1482 | * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages | |
1483 | * @args: device IDENTIFY data / SCSI command of interest. | |
1484 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1485 | * @buflen: Response buffer length. | |
1486 | * | |
1487 | * Returns list of inquiry EVPD pages available. | |
1488 | * | |
1489 | * LOCKING: | |
1490 | * spin_lock_irqsave(host_set lock) | |
1491 | */ | |
1492 | ||
1493 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1494 | unsigned int buflen) | |
1495 | { | |
1496 | const u8 pages[] = { | |
1497 | 0x00, /* page 0x00, this page */ | |
1498 | 0x80, /* page 0x80, unit serial no page */ | |
1499 | 0x83 /* page 0x83, device ident page */ | |
1500 | }; | |
1501 | rbuf[3] = sizeof(pages); /* number of supported EVPD pages */ | |
1502 | ||
1503 | if (buflen > 6) | |
1504 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1505 | ||
1506 | return 0; | |
1507 | } | |
1508 | ||
1509 | /** | |
1510 | * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number | |
1511 | * @args: device IDENTIFY data / SCSI command of interest. | |
1512 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1513 | * @buflen: Response buffer length. | |
1514 | * | |
1515 | * Returns ATA device serial number. | |
1516 | * | |
1517 | * LOCKING: | |
1518 | * spin_lock_irqsave(host_set lock) | |
1519 | */ | |
1520 | ||
1521 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1522 | unsigned int buflen) | |
1523 | { | |
1524 | const u8 hdr[] = { | |
1525 | 0, | |
1526 | 0x80, /* this page code */ | |
1527 | 0, | |
1528 | ATA_SERNO_LEN, /* page len */ | |
1529 | }; | |
1530 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1531 | ||
1532 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
1533 | ata_dev_id_string(args->id, (unsigned char *) &rbuf[4], | |
1534 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
1539 | static const char *inq_83_str = "Linux ATA-SCSI simulator"; | |
1540 | ||
1541 | /** | |
1542 | * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity | |
1543 | * @args: device IDENTIFY data / SCSI command of interest. | |
1544 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1545 | * @buflen: Response buffer length. | |
1546 | * | |
1547 | * Returns device identification. Currently hardcoded to | |
1548 | * return "Linux ATA-SCSI simulator". | |
1549 | * | |
1550 | * LOCKING: | |
1551 | * spin_lock_irqsave(host_set lock) | |
1552 | */ | |
1553 | ||
1554 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1555 | unsigned int buflen) | |
1556 | { | |
1557 | rbuf[1] = 0x83; /* this page code */ | |
1558 | rbuf[3] = 4 + strlen(inq_83_str); /* page len */ | |
1559 | ||
1560 | /* our one and only identification descriptor (vendor-specific) */ | |
1561 | if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) { | |
1562 | rbuf[4 + 0] = 2; /* code set: ASCII */ | |
1563 | rbuf[4 + 3] = strlen(inq_83_str); | |
1564 | memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str)); | |
1565 | } | |
1566 | ||
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | /** | |
0cba632b | 1571 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1572 | * @args: device IDENTIFY data / SCSI command of interest. |
1573 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1574 | * @buflen: Response buffer length. | |
1575 | * | |
1576 | * No operation. Simply returns success to caller, to indicate | |
1577 | * that the caller should successfully complete this SCSI command. | |
1578 | * | |
1579 | * LOCKING: | |
1580 | * spin_lock_irqsave(host_set lock) | |
1581 | */ | |
1582 | ||
1583 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1584 | unsigned int buflen) | |
1585 | { | |
1586 | VPRINTK("ENTER\n"); | |
1587 | return 0; | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1592 | * @ptr_io: (input/output) Location to store more output data | |
1593 | * @last: End of output data buffer | |
1594 | * @buf: Pointer to BLOB being added to output buffer | |
1595 | * @buflen: Length of BLOB | |
1596 | * | |
1597 | * Store MODE SENSE data on an output buffer. | |
1598 | * | |
1599 | * LOCKING: | |
1600 | * None. | |
1601 | */ | |
1602 | ||
1603 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1604 | const u8 *buf, unsigned int buflen) | |
1605 | { | |
1606 | u8 *ptr = *ptr_io; | |
1607 | ||
1608 | if ((ptr + buflen - 1) > last) | |
1609 | return; | |
1610 | ||
1611 | memcpy(ptr, buf, buflen); | |
1612 | ||
1613 | ptr += buflen; | |
1614 | ||
1615 | *ptr_io = ptr; | |
1616 | } | |
1617 | ||
1618 | /** | |
1619 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1620 | * @id: device IDENTIFY data | |
1621 | * @ptr_io: (input/output) Location to store more output data | |
1622 | * @last: End of output data buffer | |
1623 | * | |
1624 | * Generate a caching info page, which conditionally indicates | |
1625 | * write caching to the SCSI layer, depending on device | |
1626 | * capabilities. | |
1627 | * | |
1628 | * LOCKING: | |
1629 | * None. | |
1630 | */ | |
1631 | ||
1632 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1633 | const u8 *last) | |
1634 | { | |
00ac37f5 | 1635 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1636 | |
00ac37f5 | 1637 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1638 | if (ata_id_wcache_enabled(id)) |
1639 | page[2] |= (1 << 2); /* write cache enable */ | |
1640 | if (!ata_id_rahead_enabled(id)) | |
1641 | page[12] |= (1 << 5); /* disable read ahead */ | |
1642 | ||
1643 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1644 | return sizeof(page); | |
1645 | } | |
1646 | ||
1647 | /** | |
1648 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1649 | * @dev: Device associated with this MODE SENSE command | |
1650 | * @ptr_io: (input/output) Location to store more output data | |
1651 | * @last: End of output data buffer | |
1652 | * | |
1653 | * Generate a generic MODE SENSE control mode page. | |
1654 | * | |
1655 | * LOCKING: | |
1656 | * None. | |
1657 | */ | |
1658 | ||
1659 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1660 | { | |
00ac37f5 DG |
1661 | ata_msense_push(ptr_io, last, def_control_mpage, |
1662 | sizeof(def_control_mpage)); | |
1663 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1664 | } |
1665 | ||
1666 | /** | |
1667 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1668 | * @dev: Device associated with this MODE SENSE command | |
1669 | * @ptr_io: (input/output) Location to store more output data | |
1670 | * @last: End of output data buffer | |
1671 | * | |
1672 | * Generate a generic MODE SENSE r/w error recovery page. | |
1673 | * | |
1674 | * LOCKING: | |
1675 | * None. | |
1676 | */ | |
1677 | ||
1678 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1679 | { | |
1da177e4 | 1680 | |
00ac37f5 DG |
1681 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
1682 | sizeof(def_rw_recovery_mpage)); | |
1683 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
1684 | } |
1685 | ||
1686 | /** | |
1687 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1688 | * @args: device IDENTIFY data / SCSI command of interest. | |
1689 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1690 | * @buflen: Response buffer length. | |
1691 | * | |
00ac37f5 DG |
1692 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
1693 | * access devices (e.g. disks) only. There should be no block | |
1694 | * descriptor for other device types. | |
1da177e4 LT |
1695 | * |
1696 | * LOCKING: | |
1697 | * spin_lock_irqsave(host_set lock) | |
1698 | */ | |
1699 | ||
1700 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1701 | unsigned int buflen) | |
1702 | { | |
1703 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
00ac37f5 DG |
1704 | const u8 sat_blk_desc[] = { |
1705 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
1706 | 0, | |
1707 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
1708 | }; | |
1709 | u8 pg, spg; | |
1710 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
1da177e4 LT |
1711 | |
1712 | VPRINTK("ENTER\n"); | |
1713 | ||
1714 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
1715 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
1716 | /* | |
1717 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 1718 | */ |
00ac37f5 | 1719 | |
1da177e4 | 1720 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
1721 | switch (page_control) { |
1722 | case 0: /* current */ | |
1723 | break; /* supported */ | |
1724 | case 3: /* saved */ | |
1725 | goto saving_not_supp; | |
1726 | case 1: /* changeable */ | |
1727 | case 2: /* defaults */ | |
1728 | default: | |
1729 | goto invalid_fld; | |
1730 | } | |
1da177e4 | 1731 | |
00ac37f5 DG |
1732 | if (six_byte) { |
1733 | output_len = 4 + (ebd ? 8 : 0); | |
1734 | alloc_len = scsicmd[4]; | |
1735 | } else { | |
1736 | output_len = 8 + (ebd ? 8 : 0); | |
1737 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
1738 | } | |
1739 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
1740 | |
1741 | p = rbuf + output_len; | |
00ac37f5 | 1742 | last = rbuf + minlen - 1; |
1da177e4 | 1743 | |
00ac37f5 DG |
1744 | pg = scsicmd[2] & 0x3f; |
1745 | spg = scsicmd[3]; | |
1746 | /* | |
1747 | * No mode subpages supported (yet) but asking for _all_ | |
1748 | * subpages may be valid | |
1749 | */ | |
1750 | if (spg && (spg != ALL_SUB_MPAGES)) | |
1751 | goto invalid_fld; | |
1752 | ||
1753 | switch(pg) { | |
1754 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
1755 | output_len += ata_msense_rw_recovery(&p, last); |
1756 | break; | |
1757 | ||
00ac37f5 | 1758 | case CACHE_MPAGE: |
1da177e4 LT |
1759 | output_len += ata_msense_caching(args->id, &p, last); |
1760 | break; | |
1761 | ||
00ac37f5 | 1762 | case CONTROL_MPAGE: { |
1da177e4 LT |
1763 | output_len += ata_msense_ctl_mode(&p, last); |
1764 | break; | |
1765 | } | |
1766 | ||
00ac37f5 | 1767 | case ALL_MPAGES: |
1da177e4 LT |
1768 | output_len += ata_msense_rw_recovery(&p, last); |
1769 | output_len += ata_msense_caching(args->id, &p, last); | |
1770 | output_len += ata_msense_ctl_mode(&p, last); | |
1771 | break; | |
1772 | ||
1773 | default: /* invalid page code */ | |
ae006510 | 1774 | goto invalid_fld; |
1da177e4 LT |
1775 | } |
1776 | ||
00ac37f5 DG |
1777 | if (minlen < 1) |
1778 | return 0; | |
1da177e4 LT |
1779 | if (six_byte) { |
1780 | output_len--; | |
1781 | rbuf[0] = output_len; | |
00ac37f5 DG |
1782 | if (ebd) { |
1783 | if (minlen > 3) | |
1784 | rbuf[3] = sizeof(sat_blk_desc); | |
1785 | if (minlen > 11) | |
1786 | memcpy(rbuf + 4, sat_blk_desc, | |
1787 | sizeof(sat_blk_desc)); | |
1788 | } | |
1da177e4 LT |
1789 | } else { |
1790 | output_len -= 2; | |
1791 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
1792 | if (minlen > 1) |
1793 | rbuf[1] = output_len; | |
1794 | if (ebd) { | |
1795 | if (minlen > 7) | |
1796 | rbuf[7] = sizeof(sat_blk_desc); | |
1797 | if (minlen > 15) | |
1798 | memcpy(rbuf + 8, sat_blk_desc, | |
1799 | sizeof(sat_blk_desc)); | |
1800 | } | |
1da177e4 | 1801 | } |
1da177e4 | 1802 | return 0; |
ae006510 DG |
1803 | |
1804 | invalid_fld: | |
1805 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1806 | /* "Invalid field in cbd" */ | |
1807 | return 1; | |
1808 | ||
1809 | saving_not_supp: | |
1810 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
1811 | /* "Saving parameters not supported" */ | |
1812 | return 1; | |
1da177e4 LT |
1813 | } |
1814 | ||
1815 | /** | |
1816 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
1817 | * @args: device IDENTIFY data / SCSI command of interest. | |
1818 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1819 | * @buflen: Response buffer length. | |
1820 | * | |
1821 | * Simulate READ CAPACITY commands. | |
1822 | * | |
1823 | * LOCKING: | |
1824 | * spin_lock_irqsave(host_set lock) | |
1825 | */ | |
1826 | ||
1827 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
1828 | unsigned int buflen) | |
1829 | { | |
1830 | u64 n_sectors; | |
1831 | u32 tmp; | |
1832 | ||
1833 | VPRINTK("ENTER\n"); | |
1834 | ||
8bf62ece AL |
1835 | if (ata_id_has_lba(args->id)) { |
1836 | if (ata_id_has_lba48(args->id)) | |
1837 | n_sectors = ata_id_u64(args->id, 100); | |
1838 | else | |
1839 | n_sectors = ata_id_u32(args->id, 60); | |
1840 | } else { | |
1841 | /* CHS default translation */ | |
1842 | n_sectors = args->id[1] * args->id[3] * args->id[6]; | |
1843 | ||
1844 | if (ata_id_current_chs_valid(args->id)) | |
1845 | /* CHS current translation */ | |
1846 | n_sectors = ata_id_u32(args->id, 57); | |
1847 | } | |
1848 | ||
1da177e4 LT |
1849 | n_sectors--; /* ATA TotalUserSectors - 1 */ |
1850 | ||
1da177e4 | 1851 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
0c144d0d PP |
1852 | if( n_sectors >= 0xffffffffULL ) |
1853 | tmp = 0xffffffff ; /* Return max count on overflow */ | |
1854 | else | |
1855 | tmp = n_sectors ; | |
1856 | ||
1da177e4 LT |
1857 | /* sector count, 32-bit */ |
1858 | rbuf[0] = tmp >> (8 * 3); | |
1859 | rbuf[1] = tmp >> (8 * 2); | |
1860 | rbuf[2] = tmp >> (8 * 1); | |
1861 | rbuf[3] = tmp; | |
1862 | ||
1863 | /* sector size */ | |
1864 | tmp = ATA_SECT_SIZE; | |
1865 | rbuf[6] = tmp >> 8; | |
1866 | rbuf[7] = tmp; | |
1867 | ||
1868 | } else { | |
1869 | /* sector count, 64-bit */ | |
0c144d0d PP |
1870 | tmp = n_sectors >> (8 * 4); |
1871 | rbuf[2] = tmp >> (8 * 3); | |
1872 | rbuf[3] = tmp >> (8 * 2); | |
1873 | rbuf[4] = tmp >> (8 * 1); | |
1874 | rbuf[5] = tmp; | |
1875 | tmp = n_sectors; | |
1da177e4 LT |
1876 | rbuf[6] = tmp >> (8 * 3); |
1877 | rbuf[7] = tmp >> (8 * 2); | |
1878 | rbuf[8] = tmp >> (8 * 1); | |
1879 | rbuf[9] = tmp; | |
1880 | ||
1881 | /* sector size */ | |
1882 | tmp = ATA_SECT_SIZE; | |
1883 | rbuf[12] = tmp >> 8; | |
1884 | rbuf[13] = tmp; | |
1885 | } | |
1886 | ||
1887 | return 0; | |
1888 | } | |
1889 | ||
1890 | /** | |
1891 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
1892 | * @args: device IDENTIFY data / SCSI command of interest. | |
1893 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1894 | * @buflen: Response buffer length. | |
1895 | * | |
1896 | * Simulate REPORT LUNS command. | |
1897 | * | |
1898 | * LOCKING: | |
1899 | * spin_lock_irqsave(host_set lock) | |
1900 | */ | |
1901 | ||
1902 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
1903 | unsigned int buflen) | |
1904 | { | |
1905 | VPRINTK("ENTER\n"); | |
1906 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
1907 | ||
1908 | return 0; | |
1909 | } | |
1910 | ||
845c5834 DG |
1911 | /** |
1912 | * ata_scsi_set_sense - Set SCSI sense data and status | |
1913 | * @cmd: SCSI request to be handled | |
1914 | * @sk: SCSI-defined sense key | |
1915 | * @asc: SCSI-defined additional sense code | |
1916 | * @ascq: SCSI-defined additional sense code qualifier | |
1917 | * | |
1918 | * Helper function that builds a valid fixed format, current | |
1919 | * response code and the given sense key (sk), additional sense | |
1920 | * code (asc) and additional sense code qualifier (ascq) with | |
1921 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
1922 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
1923 | * | |
1924 | * LOCKING: | |
1925 | * Not required | |
1926 | */ | |
1927 | ||
1928 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
1929 | { | |
1930 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
1931 | ||
1932 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
1933 | cmd->sense_buffer[2] = sk; | |
1934 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
1935 | cmd->sense_buffer[12] = asc; | |
1936 | cmd->sense_buffer[13] = ascq; | |
1937 | } | |
1938 | ||
1da177e4 LT |
1939 | /** |
1940 | * ata_scsi_badcmd - End a SCSI request with an error | |
1941 | * @cmd: SCSI request to be handled | |
1942 | * @done: SCSI command completion function | |
1943 | * @asc: SCSI-defined additional sense code | |
1944 | * @ascq: SCSI-defined additional sense code qualifier | |
1945 | * | |
1946 | * Helper function that completes a SCSI command with | |
1947 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
1948 | * and the specified additional sense codes. | |
1949 | * | |
1950 | * LOCKING: | |
1951 | * spin_lock_irqsave(host_set lock) | |
1952 | */ | |
1953 | ||
1954 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
1955 | { | |
1956 | DPRINTK("ENTER\n"); | |
ae006510 | 1957 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
1958 | |
1959 | done(cmd); | |
1960 | } | |
1961 | ||
a939c963 JG |
1962 | void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, |
1963 | struct scsi_cmnd *cmd) | |
1964 | { | |
1965 | DECLARE_COMPLETION(wait); | |
1966 | struct ata_queued_cmd *qc; | |
1967 | unsigned long flags; | |
1968 | int rc; | |
1969 | ||
1970 | DPRINTK("ATAPI request sense\n"); | |
1971 | ||
1972 | qc = ata_qc_new_init(ap, dev); | |
1973 | BUG_ON(qc == NULL); | |
1974 | ||
1975 | /* FIXME: is this needed? */ | |
1976 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
1977 | ||
1978 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); | |
1979 | qc->dma_dir = DMA_FROM_DEVICE; | |
1980 | ||
1981 | memset(&qc->cdb, 0, ap->cdb_len); | |
1982 | qc->cdb[0] = REQUEST_SENSE; | |
1983 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
1984 | ||
1985 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1986 | qc->tf.command = ATA_CMD_PACKET; | |
1987 | ||
1988 | qc->tf.protocol = ATA_PROT_ATAPI; | |
1989 | qc->tf.lbam = (8 * 1024) & 0xff; | |
1990 | qc->tf.lbah = (8 * 1024) >> 8; | |
1991 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; | |
1992 | ||
1993 | qc->waiting = &wait; | |
1994 | qc->complete_fn = ata_qc_complete_noop; | |
1995 | ||
1996 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
1997 | rc = ata_qc_issue(qc); | |
1998 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1999 | ||
2000 | if (rc) | |
2001 | ata_port_disable(ap); | |
2002 | else | |
2003 | wait_for_completion(&wait); | |
2004 | ||
2005 | DPRINTK("EXIT\n"); | |
2006 | } | |
2007 | ||
a7dac447 | 2008 | static int atapi_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask) |
1da177e4 LT |
2009 | { |
2010 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2011 | ||
a7dac447 | 2012 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2013 | |
a7dac447 | 2014 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 LT |
2015 | DPRINTK("request check condition\n"); |
2016 | ||
a15dbeb4 JG |
2017 | /* FIXME: command completion with check condition |
2018 | * but no sense causes the error handler to run, | |
2019 | * which then issues REQUEST SENSE, fills in the sense | |
2020 | * buffer, and completes the command (for the second | |
2021 | * time). We need to issue REQUEST SENSE some other | |
2022 | * way, to avoid completing the command twice. | |
2023 | */ | |
1da177e4 LT |
2024 | cmd->result = SAM_STAT_CHECK_CONDITION; |
2025 | ||
2026 | qc->scsidone(cmd); | |
2027 | ||
2028 | return 1; | |
e12669e7 JG |
2029 | } |
2030 | ||
a7dac447 JG |
2031 | else if (unlikely(err_mask)) |
2032 | /* FIXME: not quite right; we don't want the | |
2033 | * translation of taskfile registers into | |
2034 | * a sense descriptors, since that's only | |
2035 | * correct for ATA, not ATAPI | |
2036 | */ | |
2037 | ata_gen_ata_desc_sense(qc); | |
2038 | ||
e12669e7 | 2039 | else { |
1da177e4 LT |
2040 | u8 *scsicmd = cmd->cmnd; |
2041 | ||
2042 | if (scsicmd[0] == INQUIRY) { | |
2043 | u8 *buf = NULL; | |
2044 | unsigned int buflen; | |
2045 | ||
2046 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2047 | |
2048 | /* ATAPI devices typically report zero for their SCSI version, | |
2049 | * and sometimes deviate from the spec WRT response data | |
2050 | * format. If SCSI version is reported as zero like normal, | |
2051 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2052 | * to indicate to the Linux scsi midlayer this is a modern | |
2053 | * device. 2) Ensure response data format / ATAPI information | |
2054 | * are always correct. | |
2055 | */ | |
2056 | /* FIXME: do we ever override EVPD pages and the like, with | |
2057 | * this code? | |
2058 | */ | |
2059 | if (buf[2] == 0) { | |
2060 | buf[2] = 0x5; | |
2061 | buf[3] = 0x32; | |
2062 | } | |
2063 | ||
1da177e4 LT |
2064 | ata_scsi_rbuf_put(cmd, buf); |
2065 | } | |
a15dbeb4 | 2066 | |
1da177e4 LT |
2067 | cmd->result = SAM_STAT_GOOD; |
2068 | } | |
2069 | ||
2070 | qc->scsidone(cmd); | |
1da177e4 LT |
2071 | return 0; |
2072 | } | |
2073 | /** | |
2074 | * atapi_xlat - Initialize PACKET taskfile | |
2075 | * @qc: command structure to be initialized | |
2076 | * @scsicmd: SCSI CDB associated with this PACKET command | |
2077 | * | |
2078 | * LOCKING: | |
2079 | * spin_lock_irqsave(host_set lock) | |
2080 | * | |
2081 | * RETURNS: | |
2082 | * Zero on success, non-zero on failure. | |
2083 | */ | |
2084 | ||
057ace5e | 2085 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
2086 | { |
2087 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2088 | struct ata_device *dev = qc->dev; | |
2089 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
0274aa25 | 2090 | int nodata = (cmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
2091 | |
2092 | if (!using_pio) | |
2093 | /* Check whether ATAPI DMA is safe */ | |
2094 | if (ata_check_atapi_dma(qc)) | |
2095 | using_pio = 1; | |
2096 | ||
2097 | memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len); | |
2098 | ||
2099 | qc->complete_fn = atapi_qc_complete; | |
2100 | ||
2101 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
0274aa25 | 2102 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2103 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2104 | DPRINTK("direction: write\n"); | |
2105 | } | |
2106 | ||
2107 | qc->tf.command = ATA_CMD_PACKET; | |
2108 | ||
2109 | /* no data, or PIO data xfer */ | |
2110 | if (using_pio || nodata) { | |
2111 | if (nodata) | |
2112 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2113 | else | |
2114 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2115 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2116 | qc->tf.lbah = (8 * 1024) >> 8; | |
2117 | } | |
2118 | ||
2119 | /* DMA data xfer */ | |
2120 | else { | |
2121 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2122 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2123 | ||
2124 | #ifdef ATAPI_ENABLE_DMADIR | |
2125 | /* some SATA bridges need us to indicate data xfer direction */ | |
0274aa25 | 2126 | if (cmd->sc_data_direction != DMA_TO_DEVICE) |
1da177e4 LT |
2127 | qc->tf.feature |= ATAPI_DMADIR; |
2128 | #endif | |
2129 | } | |
2130 | ||
2131 | qc->nbytes = cmd->bufflen; | |
2132 | ||
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | /** | |
2137 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2138 | * @ap: ATA port to which the device is attached | |
2139 | * @scsidev: SCSI device from which we derive the ATA device | |
2140 | * | |
2141 | * Given various information provided in struct scsi_cmnd, | |
2142 | * map that onto an ATA bus, and using that mapping | |
2143 | * determine which ata_device is associated with the | |
2144 | * SCSI command to be sent. | |
2145 | * | |
2146 | * LOCKING: | |
2147 | * spin_lock_irqsave(host_set lock) | |
2148 | * | |
2149 | * RETURNS: | |
2150 | * Associated ATA device, or %NULL if not found. | |
2151 | */ | |
2152 | ||
2153 | static struct ata_device * | |
057ace5e | 2154 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 LT |
2155 | { |
2156 | struct ata_device *dev; | |
2157 | ||
2158 | /* skip commands not addressed to targets we simulate */ | |
2159 | if (likely(scsidev->id < ATA_MAX_DEVICES)) | |
2160 | dev = &ap->device[scsidev->id]; | |
2161 | else | |
2162 | return NULL; | |
2163 | ||
2164 | if (unlikely((scsidev->channel != 0) || | |
2165 | (scsidev->lun != 0))) | |
2166 | return NULL; | |
2167 | ||
2168 | if (unlikely(!ata_dev_present(dev))) | |
2169 | return NULL; | |
2170 | ||
6f106233 | 2171 | if (!atapi_enabled) { |
1623c81e JG |
2172 | if (unlikely(dev->class == ATA_DEV_ATAPI)) |
2173 | return NULL; | |
2174 | } | |
1da177e4 LT |
2175 | |
2176 | return dev; | |
2177 | } | |
2178 | ||
b095518e JG |
2179 | /* |
2180 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2181 | * @byte1: Byte 1 from pass-thru CDB. | |
2182 | * | |
2183 | * RETURNS: | |
2184 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2185 | */ | |
2186 | static u8 | |
2187 | ata_scsi_map_proto(u8 byte1) | |
2188 | { | |
2189 | switch((byte1 & 0x1e) >> 1) { | |
2190 | case 3: /* Non-data */ | |
2191 | return ATA_PROT_NODATA; | |
2192 | ||
2193 | case 6: /* DMA */ | |
2194 | return ATA_PROT_DMA; | |
2195 | ||
2196 | case 4: /* PIO Data-in */ | |
2197 | case 5: /* PIO Data-out */ | |
2198 | if (byte1 & 0xe0) { | |
2199 | return ATA_PROT_PIO_MULT; | |
2200 | } | |
2201 | return ATA_PROT_PIO; | |
2202 | ||
2203 | case 10: /* Device Reset */ | |
2204 | case 0: /* Hard Reset */ | |
2205 | case 1: /* SRST */ | |
2206 | case 2: /* Bus Idle */ | |
2207 | case 7: /* Packet */ | |
2208 | case 8: /* DMA Queued */ | |
2209 | case 9: /* Device Diagnostic */ | |
2210 | case 11: /* UDMA Data-in */ | |
2211 | case 12: /* UDMA Data-Out */ | |
2212 | case 13: /* FPDMA */ | |
2213 | default: /* Reserved */ | |
2214 | break; | |
2215 | } | |
2216 | ||
2217 | return ATA_PROT_UNKNOWN; | |
2218 | } | |
2219 | ||
2220 | /** | |
2221 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2222 | * @qc: command structure to be initialized | |
2223 | * @cmd: SCSI command to convert | |
2224 | * | |
2225 | * Handles either 12 or 16-byte versions of the CDB. | |
2226 | * | |
2227 | * RETURNS: | |
2228 | * Zero on success, non-zero on failure. | |
2229 | */ | |
2230 | static unsigned int | |
00ac37f5 | 2231 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd) |
b095518e JG |
2232 | { |
2233 | struct ata_taskfile *tf = &(qc->tf); | |
2234 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2235 | ||
2236 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) | |
2237 | return 1; | |
2238 | ||
2239 | /* | |
2240 | * 12 and 16 byte CDBs use different offsets to | |
2241 | * provide the various register values. | |
2242 | */ | |
2243 | if (scsicmd[0] == ATA_16) { | |
2244 | /* | |
2245 | * 16-byte CDB - may contain extended commands. | |
2246 | * | |
2247 | * If that is the case, copy the upper byte register values. | |
2248 | */ | |
2249 | if (scsicmd[1] & 0x01) { | |
2250 | tf->hob_feature = scsicmd[3]; | |
2251 | tf->hob_nsect = scsicmd[5]; | |
2252 | tf->hob_lbal = scsicmd[7]; | |
2253 | tf->hob_lbam = scsicmd[9]; | |
2254 | tf->hob_lbah = scsicmd[11]; | |
2255 | tf->flags |= ATA_TFLAG_LBA48; | |
2256 | } else | |
2257 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2258 | ||
2259 | /* | |
2260 | * Always copy low byte, device and command registers. | |
2261 | */ | |
2262 | tf->feature = scsicmd[4]; | |
2263 | tf->nsect = scsicmd[6]; | |
2264 | tf->lbal = scsicmd[8]; | |
2265 | tf->lbam = scsicmd[10]; | |
2266 | tf->lbah = scsicmd[12]; | |
2267 | tf->device = scsicmd[13]; | |
2268 | tf->command = scsicmd[14]; | |
2269 | } else { | |
2270 | /* | |
2271 | * 12-byte CDB - incapable of extended commands. | |
2272 | */ | |
2273 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2274 | ||
2275 | tf->feature = scsicmd[3]; | |
2276 | tf->nsect = scsicmd[4]; | |
2277 | tf->lbal = scsicmd[5]; | |
2278 | tf->lbam = scsicmd[6]; | |
2279 | tf->lbah = scsicmd[7]; | |
2280 | tf->device = scsicmd[8]; | |
2281 | tf->command = scsicmd[9]; | |
2282 | } | |
2283 | ||
2284 | /* | |
2285 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2286 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2287 | * by an update to hardware-specific registers for each | |
2288 | * controller (i.e. the reason for ->set_piomode(), | |
2289 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2290 | */ | |
2291 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2292 | && (tf->feature == SETFEATURES_XFER)) | |
2293 | return 1; | |
2294 | ||
2295 | /* | |
2296 | * Set flags so that all registers will be written, | |
2297 | * and pass on write indication (used for PIO/DMA | |
2298 | * setup.) | |
2299 | */ | |
2300 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2301 | ||
0274aa25 | 2302 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2303 | tf->flags |= ATA_TFLAG_WRITE; |
2304 | ||
2305 | /* | |
2306 | * Set transfer length. | |
2307 | * | |
2308 | * TODO: find out if we need to do more here to | |
2309 | * cover scatter/gather case. | |
2310 | */ | |
2311 | qc->nsect = cmd->bufflen / ATA_SECT_SIZE; | |
2312 | ||
2313 | return 0; | |
2314 | } | |
2315 | ||
1da177e4 LT |
2316 | /** |
2317 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2318 | * @dev: ATA device | |
2319 | * @cmd: SCSI command opcode to consider | |
2320 | * | |
2321 | * Look up the SCSI command given, and determine whether the | |
2322 | * SCSI command is to be translated or simulated. | |
2323 | * | |
2324 | * RETURNS: | |
2325 | * Pointer to translation function if possible, %NULL if not. | |
2326 | */ | |
2327 | ||
2328 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2329 | { | |
2330 | switch (cmd) { | |
2331 | case READ_6: | |
2332 | case READ_10: | |
2333 | case READ_16: | |
2334 | ||
2335 | case WRITE_6: | |
2336 | case WRITE_10: | |
2337 | case WRITE_16: | |
2338 | return ata_scsi_rw_xlat; | |
2339 | ||
2340 | case SYNCHRONIZE_CACHE: | |
2341 | if (ata_try_flush_cache(dev)) | |
2342 | return ata_scsi_flush_xlat; | |
2343 | break; | |
2344 | ||
2345 | case VERIFY: | |
2346 | case VERIFY_16: | |
2347 | return ata_scsi_verify_xlat; | |
b095518e JG |
2348 | |
2349 | case ATA_12: | |
2350 | case ATA_16: | |
2351 | return ata_scsi_pass_thru; | |
da61396d | 2352 | |
972dcafb DG |
2353 | case START_STOP: |
2354 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2355 | } |
2356 | ||
2357 | return NULL; | |
2358 | } | |
2359 | ||
2360 | /** | |
2361 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2362 | * @ap: ATA port to which the command was being sent | |
2363 | * @cmd: SCSI command to dump | |
2364 | * | |
2365 | * Prints the contents of a SCSI command via printk(). | |
2366 | */ | |
2367 | ||
2368 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2369 | struct scsi_cmnd *cmd) | |
2370 | { | |
2371 | #ifdef ATA_DEBUG | |
2372 | struct scsi_device *scsidev = cmd->device; | |
2373 | u8 *scsicmd = cmd->cmnd; | |
2374 | ||
2375 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2376 | ap->id, | |
2377 | scsidev->channel, scsidev->id, scsidev->lun, | |
2378 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2379 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2380 | scsicmd[8]); | |
2381 | #endif | |
2382 | } | |
2383 | ||
2384 | /** | |
2385 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2386 | * @cmd: SCSI command to be sent | |
2387 | * @done: Completion function, called when command is complete | |
2388 | * | |
2389 | * In some cases, this function translates SCSI commands into | |
2390 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2391 | * hardware. In other cases, this function simulates a | |
2392 | * SCSI device by evaluating and responding to certain | |
2393 | * SCSI commands. This creates the overall effect of | |
2394 | * ATA and ATAPI devices appearing as SCSI devices. | |
2395 | * | |
2396 | * LOCKING: | |
2397 | * Releases scsi-layer-held lock, and obtains host_set lock. | |
2398 | * | |
2399 | * RETURNS: | |
2400 | * Zero. | |
2401 | */ | |
2402 | ||
2403 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
2404 | { | |
2405 | struct ata_port *ap; | |
2406 | struct ata_device *dev; | |
2407 | struct scsi_device *scsidev = cmd->device; | |
2408 | ||
2409 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
2410 | ||
2411 | ata_scsi_dump_cdb(ap, cmd); | |
2412 | ||
2413 | dev = ata_scsi_find_dev(ap, scsidev); | |
2414 | if (unlikely(!dev)) { | |
2415 | cmd->result = (DID_BAD_TARGET << 16); | |
2416 | done(cmd); | |
2417 | goto out_unlock; | |
2418 | } | |
2419 | ||
2420 | if (dev->class == ATA_DEV_ATA) { | |
2421 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
2422 | cmd->cmnd[0]); | |
2423 | ||
2424 | if (xlat_func) | |
2425 | ata_scsi_translate(ap, dev, cmd, done, xlat_func); | |
2426 | else | |
2427 | ata_scsi_simulate(dev->id, cmd, done); | |
2428 | } else | |
2429 | ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); | |
2430 | ||
2431 | out_unlock: | |
2432 | return 0; | |
2433 | } | |
2434 | ||
2435 | /** | |
2436 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
2437 | * @id: current IDENTIFY data for target device. | |
2438 | * @cmd: SCSI command being sent to device. | |
2439 | * @done: SCSI command completion function. | |
2440 | * | |
2441 | * Interprets and directly executes a select list of SCSI commands | |
2442 | * that can be handled internally. | |
2443 | * | |
2444 | * LOCKING: | |
2445 | * spin_lock_irqsave(host_set lock) | |
2446 | */ | |
2447 | ||
2448 | void ata_scsi_simulate(u16 *id, | |
2449 | struct scsi_cmnd *cmd, | |
2450 | void (*done)(struct scsi_cmnd *)) | |
2451 | { | |
2452 | struct ata_scsi_args args; | |
057ace5e | 2453 | const u8 *scsicmd = cmd->cmnd; |
1da177e4 LT |
2454 | |
2455 | args.id = id; | |
2456 | args.cmd = cmd; | |
2457 | args.done = done; | |
2458 | ||
2459 | switch(scsicmd[0]) { | |
2460 | /* no-op's, complete with success */ | |
2461 | case SYNCHRONIZE_CACHE: | |
2462 | case REZERO_UNIT: | |
2463 | case SEEK_6: | |
2464 | case SEEK_10: | |
2465 | case TEST_UNIT_READY: | |
2466 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2467 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2468 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2469 | break; | |
2470 | ||
2471 | case INQUIRY: | |
2472 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 2473 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2474 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2475 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2476 | else if (scsicmd[2] == 0x00) | |
2477 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2478 | else if (scsicmd[2] == 0x80) | |
2479 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2480 | else if (scsicmd[2] == 0x83) | |
2481 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2482 | else | |
ae006510 | 2483 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2484 | break; |
2485 | ||
2486 | case MODE_SENSE: | |
2487 | case MODE_SENSE_10: | |
2488 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2489 | break; | |
2490 | ||
2491 | case MODE_SELECT: /* unconditionally return */ | |
2492 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 2493 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2494 | break; |
2495 | ||
2496 | case READ_CAPACITY: | |
2497 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2498 | break; | |
2499 | ||
2500 | case SERVICE_ACTION_IN: | |
2501 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2502 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2503 | else | |
ae006510 | 2504 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2505 | break; |
2506 | ||
2507 | case REPORT_LUNS: | |
2508 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2509 | break; | |
2510 | ||
b095518e | 2511 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2512 | case REQUEST_SENSE: |
2513 | ||
2514 | /* all other commands */ | |
2515 | default: | |
ae006510 DG |
2516 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
2517 | /* "Invalid command operation code" */ | |
2518 | done(cmd); | |
1da177e4 LT |
2519 | break; |
2520 | } | |
2521 | } | |
2522 | ||
644dd0cc JG |
2523 | void ata_scsi_scan_host(struct ata_port *ap) |
2524 | { | |
3f19ee8c | 2525 | struct ata_device *dev; |
644dd0cc JG |
2526 | unsigned int i; |
2527 | ||
2528 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
2529 | return; | |
2530 | ||
3f19ee8c JG |
2531 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2532 | dev = &ap->device[i]; | |
2533 | ||
2534 | if (ata_dev_present(dev)) | |
2535 | scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); | |
2536 | } | |
644dd0cc JG |
2537 | } |
2538 |