Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
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 | */ | |
563 | if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) { | |
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 | */ | |
638 | if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) { | |
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 | |
b095518e JG |
647 | if (tf->flags & ATA_TFLAG_LBA && !(tf->flags & ATA_TFLAG_LBA48)) { |
648 | /* A small (28b) LBA will fit in the 32b info field */ | |
649 | sb[0] |= 0x80; /* set valid bit */ | |
650 | sb[3] = tf->device & 0x0f; | |
651 | sb[4] = tf->lbah; | |
652 | sb[5] = tf->lbam; | |
653 | sb[6] = tf->lbal; | |
1da177e4 LT |
654 | } |
655 | } | |
656 | ||
657 | /** | |
658 | * ata_scsi_slave_config - Set SCSI device attributes | |
659 | * @sdev: SCSI device to examine | |
660 | * | |
661 | * This is called before we actually start reading | |
662 | * and writing to the device, to configure certain | |
663 | * SCSI mid-layer behaviors. | |
664 | * | |
665 | * LOCKING: | |
666 | * Defined by SCSI layer. We don't really care. | |
667 | */ | |
668 | ||
669 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
670 | { | |
671 | sdev->use_10_for_rw = 1; | |
672 | sdev->use_10_for_ms = 1; | |
673 | ||
674 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
675 | ||
676 | if (sdev->id < ATA_MAX_DEVICES) { | |
677 | struct ata_port *ap; | |
678 | struct ata_device *dev; | |
679 | ||
680 | ap = (struct ata_port *) &sdev->host->hostdata[0]; | |
681 | dev = &ap->device[sdev->id]; | |
682 | ||
683 | /* TODO: 1024 is an arbitrary number, not the | |
684 | * hardware maximum. This should be increased to | |
685 | * 65534 when Jens Axboe's patch for dynamically | |
686 | * determining max_sectors is merged. | |
687 | */ | |
688 | if ((dev->flags & ATA_DFLAG_LBA48) && | |
689 | ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) { | |
f85bdb9c JL |
690 | /* |
691 | * do not overwrite sdev->host->max_sectors, since | |
692 | * other drives on this host may not support LBA48 | |
693 | */ | |
1da177e4 LT |
694 | blk_queue_max_sectors(sdev->request_queue, 2048); |
695 | } | |
696 | } | |
697 | ||
698 | return 0; /* scsi layer doesn't check return value, sigh */ | |
699 | } | |
700 | ||
701 | /** | |
702 | * ata_scsi_error - SCSI layer error handler callback | |
703 | * @host: SCSI host on which error occurred | |
704 | * | |
705 | * Handles SCSI-layer-thrown error events. | |
706 | * | |
707 | * LOCKING: | |
708 | * Inherited from SCSI layer (none, can sleep) | |
709 | * | |
710 | * RETURNS: | |
711 | * Zero. | |
712 | */ | |
713 | ||
714 | int ata_scsi_error(struct Scsi_Host *host) | |
715 | { | |
716 | struct ata_port *ap; | |
717 | ||
718 | DPRINTK("ENTER\n"); | |
719 | ||
720 | ap = (struct ata_port *) &host->hostdata[0]; | |
721 | ap->ops->eng_timeout(ap); | |
722 | ||
723 | /* TODO: this is per-command; when queueing is supported | |
724 | * this code will either change or move to a more | |
725 | * appropriate place | |
726 | */ | |
727 | host->host_failed--; | |
42517438 | 728 | INIT_LIST_HEAD(&host->eh_cmd_q); |
1da177e4 LT |
729 | |
730 | DPRINTK("EXIT\n"); | |
731 | return 0; | |
732 | } | |
733 | ||
972dcafb DG |
734 | /** |
735 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
736 | * @qc: Storage for translated ATA taskfile | |
737 | * @scsicmd: SCSI command to translate | |
738 | * | |
739 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
740 | * (to start). Perhaps these commands should be preceded by | |
741 | * CHECK POWER MODE to see what power mode the device is already in. | |
742 | * [See SAT revision 5 at www.t10.org] | |
743 | * | |
744 | * LOCKING: | |
745 | * spin_lock_irqsave(host_set lock) | |
746 | * | |
747 | * RETURNS: | |
748 | * Zero on success, non-zero on error. | |
749 | */ | |
750 | ||
751 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, | |
057ace5e | 752 | const u8 *scsicmd) |
972dcafb DG |
753 | { |
754 | struct ata_taskfile *tf = &qc->tf; | |
755 | ||
756 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
757 | tf->protocol = ATA_PROT_NODATA; | |
758 | if (scsicmd[1] & 0x1) { | |
759 | ; /* ignore IMMED bit, violates sat-r05 */ | |
760 | } | |
761 | if (scsicmd[4] & 0x2) | |
ae006510 | 762 | goto invalid_fld; /* LOEJ bit set not supported */ |
972dcafb | 763 | if (((scsicmd[4] >> 4) & 0xf) != 0) |
ae006510 | 764 | goto invalid_fld; /* power conditions not supported */ |
972dcafb DG |
765 | if (scsicmd[4] & 0x1) { |
766 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
9d5b1302 AL |
767 | |
768 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
769 | qc->tf.flags |= ATA_TFLAG_LBA; | |
770 | ||
771 | tf->lbah = 0x0; | |
772 | tf->lbam = 0x0; | |
773 | tf->lbal = 0x0; | |
774 | tf->device |= ATA_LBA; | |
775 | } else { | |
776 | /* CHS */ | |
777 | tf->lbal = 0x1; /* sect */ | |
778 | tf->lbam = 0x0; /* cyl low */ | |
779 | tf->lbah = 0x0; /* cyl high */ | |
780 | } | |
781 | ||
972dcafb DG |
782 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
783 | } else { | |
784 | tf->nsect = 0; /* time period value (0 implies now) */ | |
785 | tf->command = ATA_CMD_STANDBY; | |
786 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
787 | } | |
788 | /* | |
789 | * Standby and Idle condition timers could be implemented but that | |
790 | * would require libata to implement the Power condition mode page | |
791 | * and allow the user to change it. Changing mode pages requires | |
792 | * MODE SELECT to be implemented. | |
793 | */ | |
794 | ||
795 | return 0; | |
ae006510 DG |
796 | |
797 | invalid_fld: | |
798 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
799 | /* "Invalid field in cbd" */ | |
800 | return 1; | |
972dcafb DG |
801 | } |
802 | ||
803 | ||
1da177e4 LT |
804 | /** |
805 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
806 | * @qc: Storage for translated ATA taskfile | |
807 | * @scsicmd: SCSI command to translate (ignored) | |
808 | * | |
809 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
810 | * FLUSH CACHE EXT. | |
811 | * | |
812 | * LOCKING: | |
813 | * spin_lock_irqsave(host_set lock) | |
814 | * | |
815 | * RETURNS: | |
816 | * Zero on success, non-zero on error. | |
817 | */ | |
818 | ||
057ace5e | 819 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
820 | { |
821 | struct ata_taskfile *tf = &qc->tf; | |
822 | ||
823 | tf->flags |= ATA_TFLAG_DEVICE; | |
824 | tf->protocol = ATA_PROT_NODATA; | |
825 | ||
07506697 | 826 | if ((qc->dev->flags & ATA_DFLAG_LBA48) && |
1da177e4 LT |
827 | (ata_id_has_flush_ext(qc->dev->id))) |
828 | tf->command = ATA_CMD_FLUSH_EXT; | |
829 | else | |
830 | tf->command = ATA_CMD_FLUSH; | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
3aef5231 AL |
835 | /** |
836 | * scsi_6_lba_len - Get LBA and transfer length | |
837 | * @scsicmd: SCSI command to translate | |
838 | * | |
839 | * Calculate LBA and transfer length for 6-byte commands. | |
840 | * | |
841 | * RETURNS: | |
842 | * @plba: the LBA | |
843 | * @plen: the transfer length | |
844 | */ | |
845 | ||
057ace5e | 846 | static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
847 | { |
848 | u64 lba = 0; | |
849 | u32 len = 0; | |
850 | ||
851 | VPRINTK("six-byte command\n"); | |
852 | ||
853 | lba |= ((u64)scsicmd[2]) << 8; | |
854 | lba |= ((u64)scsicmd[3]); | |
855 | ||
856 | len |= ((u32)scsicmd[4]); | |
857 | ||
858 | *plba = lba; | |
859 | *plen = len; | |
860 | } | |
861 | ||
862 | /** | |
863 | * scsi_10_lba_len - Get LBA and transfer length | |
864 | * @scsicmd: SCSI command to translate | |
865 | * | |
866 | * Calculate LBA and transfer length for 10-byte commands. | |
867 | * | |
868 | * RETURNS: | |
869 | * @plba: the LBA | |
870 | * @plen: the transfer length | |
871 | */ | |
872 | ||
057ace5e | 873 | static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
874 | { |
875 | u64 lba = 0; | |
876 | u32 len = 0; | |
877 | ||
878 | VPRINTK("ten-byte command\n"); | |
879 | ||
880 | lba |= ((u64)scsicmd[2]) << 24; | |
881 | lba |= ((u64)scsicmd[3]) << 16; | |
882 | lba |= ((u64)scsicmd[4]) << 8; | |
883 | lba |= ((u64)scsicmd[5]); | |
884 | ||
885 | len |= ((u32)scsicmd[7]) << 8; | |
886 | len |= ((u32)scsicmd[8]); | |
887 | ||
888 | *plba = lba; | |
889 | *plen = len; | |
890 | } | |
891 | ||
892 | /** | |
893 | * scsi_16_lba_len - Get LBA and transfer length | |
894 | * @scsicmd: SCSI command to translate | |
895 | * | |
896 | * Calculate LBA and transfer length for 16-byte commands. | |
897 | * | |
898 | * RETURNS: | |
899 | * @plba: the LBA | |
900 | * @plen: the transfer length | |
901 | */ | |
902 | ||
057ace5e | 903 | static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
3aef5231 AL |
904 | { |
905 | u64 lba = 0; | |
906 | u32 len = 0; | |
907 | ||
908 | VPRINTK("sixteen-byte command\n"); | |
909 | ||
910 | lba |= ((u64)scsicmd[2]) << 56; | |
911 | lba |= ((u64)scsicmd[3]) << 48; | |
912 | lba |= ((u64)scsicmd[4]) << 40; | |
913 | lba |= ((u64)scsicmd[5]) << 32; | |
914 | lba |= ((u64)scsicmd[6]) << 24; | |
915 | lba |= ((u64)scsicmd[7]) << 16; | |
916 | lba |= ((u64)scsicmd[8]) << 8; | |
917 | lba |= ((u64)scsicmd[9]); | |
918 | ||
919 | len |= ((u32)scsicmd[10]) << 24; | |
920 | len |= ((u32)scsicmd[11]) << 16; | |
921 | len |= ((u32)scsicmd[12]) << 8; | |
922 | len |= ((u32)scsicmd[13]); | |
923 | ||
924 | *plba = lba; | |
925 | *plen = len; | |
926 | } | |
927 | ||
1da177e4 LT |
928 | /** |
929 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
930 | * @qc: Storage for translated ATA taskfile | |
931 | * @scsicmd: SCSI command to translate | |
932 | * | |
933 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
934 | * | |
935 | * LOCKING: | |
936 | * spin_lock_irqsave(host_set lock) | |
937 | * | |
938 | * RETURNS: | |
939 | * Zero on success, non-zero on error. | |
940 | */ | |
941 | ||
057ace5e | 942 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
943 | { |
944 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece | 945 | struct ata_device *dev = qc->dev; |
1da177e4 | 946 | u64 dev_sectors = qc->dev->n_sectors; |
3aef5231 AL |
947 | u64 block; |
948 | u32 n_block; | |
1da177e4 LT |
949 | |
950 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
951 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 952 | |
3aef5231 AL |
953 | if (scsicmd[0] == VERIFY) |
954 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
955 | else if (scsicmd[0] == VERIFY_16) | |
956 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1da177e4 | 957 | else |
ae006510 | 958 | goto invalid_fld; |
1da177e4 | 959 | |
8bf62ece | 960 | if (!n_block) |
ae006510 | 961 | goto nothing_to_do; |
8bf62ece | 962 | if (block >= dev_sectors) |
ae006510 | 963 | goto out_of_range; |
8bf62ece | 964 | if ((block + n_block) > dev_sectors) |
ae006510 | 965 | goto out_of_range; |
1da177e4 | 966 | |
07506697 AL |
967 | if (dev->flags & ATA_DFLAG_LBA) { |
968 | tf->flags |= ATA_TFLAG_LBA; | |
969 | ||
970 | if (dev->flags & ATA_DFLAG_LBA48) { | |
971 | if (n_block > (64 * 1024)) | |
972 | goto invalid_fld; | |
973 | ||
974 | /* use LBA48 */ | |
975 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 976 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 977 | |
8bf62ece | 978 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 979 | |
8bf62ece AL |
980 | tf->hob_lbah = (block >> 40) & 0xff; |
981 | tf->hob_lbam = (block >> 32) & 0xff; | |
982 | tf->hob_lbal = (block >> 24) & 0xff; | |
983 | } else { | |
07506697 AL |
984 | if (n_block > 256) |
985 | goto invalid_fld; | |
986 | ||
987 | /* use LBA28 */ | |
8bf62ece | 988 | tf->command = ATA_CMD_VERIFY; |
1da177e4 | 989 | |
8bf62ece AL |
990 | tf->device |= (block >> 24) & 0xf; |
991 | } | |
992 | ||
993 | tf->nsect = n_block & 0xff; | |
1da177e4 | 994 | |
8bf62ece AL |
995 | tf->lbah = (block >> 16) & 0xff; |
996 | tf->lbam = (block >> 8) & 0xff; | |
997 | tf->lbal = block & 0xff; | |
1da177e4 | 998 | |
8bf62ece | 999 | tf->device |= ATA_LBA; |
1da177e4 | 1000 | } else { |
8bf62ece AL |
1001 | /* CHS */ |
1002 | u32 sect, head, cyl, track; | |
1003 | ||
07506697 AL |
1004 | if (n_block > 256) |
1005 | goto invalid_fld; | |
1006 | ||
8bf62ece AL |
1007 | /* Convert LBA to CHS */ |
1008 | track = (u32)block / dev->sectors; | |
1009 | cyl = track / dev->heads; | |
1010 | head = track % dev->heads; | |
1011 | sect = (u32)block % dev->sectors + 1; | |
1012 | ||
c187c4b5 AL |
1013 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1014 | (u32)block, track, cyl, head, sect); | |
8bf62ece AL |
1015 | |
1016 | /* Check whether the converted CHS can fit. | |
1017 | Cylinder: 0-65535 | |
1018 | Head: 0-15 | |
1019 | Sector: 1-255*/ | |
1020 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
ae006510 | 1021 | goto out_of_range; |
8bf62ece | 1022 | |
1da177e4 | 1023 | tf->command = ATA_CMD_VERIFY; |
8bf62ece AL |
1024 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
1025 | tf->lbal = sect; | |
1026 | tf->lbam = cyl; | |
1027 | tf->lbah = cyl >> 8; | |
1028 | tf->device |= head; | |
1da177e4 LT |
1029 | } |
1030 | ||
1da177e4 | 1031 | return 0; |
ae006510 DG |
1032 | |
1033 | invalid_fld: | |
1034 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1035 | /* "Invalid field in cbd" */ | |
1036 | return 1; | |
1da177e4 | 1037 | |
ae006510 DG |
1038 | out_of_range: |
1039 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1040 | /* "Logical Block Address out of range" */ | |
1041 | return 1; | |
1da177e4 | 1042 | |
ae006510 DG |
1043 | nothing_to_do: |
1044 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1045 | return 1; | |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | /** | |
1049 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1050 | * @qc: Storage for translated ATA taskfile | |
1051 | * @scsicmd: SCSI command to translate | |
1052 | * | |
1053 | * Converts any of six SCSI read/write commands into the | |
1054 | * ATA counterpart, including starting sector (LBA), | |
1055 | * sector count, and taking into account the device's LBA48 | |
1056 | * support. | |
1057 | * | |
1058 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1059 | * %WRITE_16 are currently supported. | |
1060 | * | |
1061 | * LOCKING: | |
1062 | * spin_lock_irqsave(host_set lock) | |
1063 | * | |
1064 | * RETURNS: | |
1065 | * Zero on success, non-zero on error. | |
1066 | */ | |
1067 | ||
057ace5e | 1068 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
1069 | { |
1070 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece | 1071 | struct ata_device *dev = qc->dev; |
3aef5231 AL |
1072 | u64 block; |
1073 | u32 n_block; | |
1da177e4 LT |
1074 | |
1075 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1da177e4 | 1076 | |
8cbd6df1 AL |
1077 | if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || |
1078 | scsicmd[0] == WRITE_16) | |
1da177e4 | 1079 | tf->flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1080 | |
8bf62ece | 1081 | /* Calculate the SCSI LBA and transfer length. */ |
3aef5231 AL |
1082 | switch (scsicmd[0]) { |
1083 | case READ_10: | |
1084 | case WRITE_10: | |
1085 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
1086 | break; | |
1087 | case READ_6: | |
1088 | case WRITE_6: | |
1089 | scsi_6_lba_len(scsicmd, &block, &n_block); | |
1da177e4 | 1090 | |
c187c4b5 AL |
1091 | /* for 6-byte r/w commands, transfer length 0 |
1092 | * means 256 blocks of data, not 0 block. | |
1093 | */ | |
76b2bf9b JG |
1094 | if (!n_block) |
1095 | n_block = 256; | |
3aef5231 AL |
1096 | break; |
1097 | case READ_16: | |
1098 | case WRITE_16: | |
1099 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1100 | break; | |
1101 | default: | |
8bf62ece | 1102 | DPRINTK("no-byte command\n"); |
ae006510 | 1103 | goto invalid_fld; |
1da177e4 | 1104 | } |
1da177e4 | 1105 | |
8bf62ece AL |
1106 | /* Check and compose ATA command */ |
1107 | if (!n_block) | |
c187c4b5 AL |
1108 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1109 | * length 0 means transfer 0 block of data. | |
1110 | * However, for ATA R/W commands, sector count 0 means | |
1111 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
1112 | */ | |
ae006510 | 1113 | goto nothing_to_do; |
1da177e4 | 1114 | |
07506697 AL |
1115 | if (dev->flags & ATA_DFLAG_LBA) { |
1116 | tf->flags |= ATA_TFLAG_LBA; | |
1117 | ||
1118 | if (dev->flags & ATA_DFLAG_LBA48) { | |
8bf62ece AL |
1119 | /* The request -may- be too large for LBA48. */ |
1120 | if ((block >> 48) || (n_block > 65536)) | |
ae006510 | 1121 | goto out_of_range; |
1da177e4 | 1122 | |
07506697 AL |
1123 | /* use LBA48 */ |
1124 | tf->flags |= ATA_TFLAG_LBA48; | |
1125 | ||
8bf62ece | 1126 | tf->hob_nsect = (n_block >> 8) & 0xff; |
13593265 | 1127 | |
8bf62ece AL |
1128 | tf->hob_lbah = (block >> 40) & 0xff; |
1129 | tf->hob_lbam = (block >> 32) & 0xff; | |
1130 | tf->hob_lbal = (block >> 24) & 0xff; | |
1131 | } else { | |
07506697 | 1132 | /* use LBA28 */ |
1da177e4 | 1133 | |
8bf62ece AL |
1134 | /* The request -may- be too large for LBA28. */ |
1135 | if ((block >> 28) || (n_block > 256)) | |
ae006510 | 1136 | goto out_of_range; |
1da177e4 | 1137 | |
8bf62ece | 1138 | tf->device |= (block >> 24) & 0xf; |
1da177e4 | 1139 | } |
1da177e4 | 1140 | |
8cbd6df1 AL |
1141 | ata_rwcmd_protocol(qc); |
1142 | ||
8bf62ece AL |
1143 | qc->nsect = n_block; |
1144 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1145 | |
8bf62ece AL |
1146 | tf->lbah = (block >> 16) & 0xff; |
1147 | tf->lbam = (block >> 8) & 0xff; | |
1148 | tf->lbal = block & 0xff; | |
1da177e4 | 1149 | |
8bf62ece AL |
1150 | tf->device |= ATA_LBA; |
1151 | } else { | |
1152 | /* CHS */ | |
1153 | u32 sect, head, cyl, track; | |
1154 | ||
1155 | /* The request -may- be too large for CHS addressing. */ | |
1156 | if ((block >> 28) || (n_block > 256)) | |
ae006510 | 1157 | goto out_of_range; |
c187c4b5 | 1158 | |
8cbd6df1 AL |
1159 | ata_rwcmd_protocol(qc); |
1160 | ||
8bf62ece AL |
1161 | /* Convert LBA to CHS */ |
1162 | track = (u32)block / dev->sectors; | |
1163 | cyl = track / dev->heads; | |
1164 | head = track % dev->heads; | |
1165 | sect = (u32)block % dev->sectors + 1; | |
1166 | ||
c187c4b5 | 1167 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
8bf62ece | 1168 | (u32)block, track, cyl, head, sect); |
c187c4b5 | 1169 | |
8bf62ece AL |
1170 | /* Check whether the converted CHS can fit. |
1171 | Cylinder: 0-65535 | |
1172 | Head: 0-15 | |
1173 | Sector: 1-255*/ | |
c187c4b5 | 1174 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1175 | goto out_of_range; |
c187c4b5 | 1176 | |
8bf62ece AL |
1177 | qc->nsect = n_block; |
1178 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1179 | tf->lbal = sect; | |
1180 | tf->lbam = cyl; | |
1181 | tf->lbah = cyl >> 8; | |
1182 | tf->device |= head; | |
1da177e4 | 1183 | } |
1da177e4 | 1184 | |
8bf62ece | 1185 | return 0; |
1da177e4 | 1186 | |
ae006510 DG |
1187 | invalid_fld: |
1188 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1189 | /* "Invalid field in cbd" */ | |
1190 | return 1; | |
1da177e4 | 1191 | |
ae006510 DG |
1192 | out_of_range: |
1193 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1194 | /* "Logical Block Address out of range" */ | |
1195 | return 1; | |
1da177e4 | 1196 | |
ae006510 DG |
1197 | nothing_to_do: |
1198 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1da177e4 LT |
1199 | return 1; |
1200 | } | |
1201 | ||
1202 | static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) | |
1203 | { | |
1204 | struct scsi_cmnd *cmd = qc->scsicmd; | |
b095518e JG |
1205 | int need_sense = drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ); |
1206 | ||
1207 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1208 | * user mandated it or if there's an error. Note that if we | |
1209 | * generate because the user forced us to, a check condition | |
1210 | * is generated and the ATA register values are returned | |
1211 | * whether the command completed successfully or not. If there | |
1212 | * was no error, SK, ASC and ASCQ will all be zero. | |
1213 | */ | |
1214 | if (((cmd->cmnd[0] == ATA_16) || (cmd->cmnd[0] == ATA_12)) && | |
1215 | ((cmd->cmnd[2] & 0x20) || need_sense)) { | |
1216 | ata_gen_ata_desc_sense(qc); | |
1217 | } else { | |
1218 | if (!need_sense) { | |
1219 | cmd->result = SAM_STAT_GOOD; | |
1220 | } else { | |
1221 | /* TODO: decide which descriptor format to use | |
1222 | * for 48b LBA devices and call that here | |
1223 | * instead of the fixed desc, which is only | |
1224 | * good for smaller LBA (and maybe CHS?) | |
1225 | * devices. | |
1226 | */ | |
1227 | ata_gen_fixed_sense(qc); | |
1228 | } | |
1229 | } | |
1da177e4 | 1230 | |
b095518e JG |
1231 | if (need_sense) { |
1232 | /* The ata_gen_..._sense routines fill in tf */ | |
1233 | ata_dump_status(qc->ap->id, &qc->tf); | |
1234 | } | |
1da177e4 LT |
1235 | |
1236 | qc->scsidone(cmd); | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | /** | |
1242 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1243 | * @ap: ATA port to which the command is addressed | |
1244 | * @dev: ATA device to which the command is addressed | |
1245 | * @cmd: SCSI command to execute | |
1246 | * @done: SCSI command completion function | |
1247 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1248 | * | |
1249 | * Our ->queuecommand() function has decided that the SCSI | |
1250 | * command issued can be directly translated into an ATA | |
1251 | * command, rather than handled internally. | |
1252 | * | |
1253 | * This function sets up an ata_queued_cmd structure for the | |
1254 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1255 | * | |
ae006510 DG |
1256 | * The xlat_func argument (actor) returns 0 if ready to execute |
1257 | * ATA command, else 1 to finish translation. If 1 is returned | |
1258 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1259 | * to be set reflecting an error condition or clean (early) | |
1260 | * termination. | |
1261 | * | |
1da177e4 LT |
1262 | * LOCKING: |
1263 | * spin_lock_irqsave(host_set lock) | |
1264 | */ | |
1265 | ||
1266 | static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, | |
1267 | struct scsi_cmnd *cmd, | |
1268 | void (*done)(struct scsi_cmnd *), | |
1269 | ata_xlat_func_t xlat_func) | |
1270 | { | |
1271 | struct ata_queued_cmd *qc; | |
1272 | u8 *scsicmd = cmd->cmnd; | |
1273 | ||
1274 | VPRINTK("ENTER\n"); | |
1275 | ||
1276 | qc = ata_scsi_qc_new(ap, dev, cmd, done); | |
1277 | if (!qc) | |
ae006510 | 1278 | goto err_mem; |
1da177e4 LT |
1279 | |
1280 | /* data is present; dma-map it */ | |
0274aa25 JG |
1281 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1282 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 LT |
1283 | if (unlikely(cmd->request_bufflen < 1)) { |
1284 | printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", | |
1285 | ap->id, dev->devno); | |
ae006510 | 1286 | goto err_did; |
1da177e4 LT |
1287 | } |
1288 | ||
1289 | if (cmd->use_sg) | |
1290 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1291 | else | |
1292 | ata_sg_init_one(qc, cmd->request_buffer, | |
1293 | cmd->request_bufflen); | |
1294 | ||
1295 | qc->dma_dir = cmd->sc_data_direction; | |
1296 | } | |
1297 | ||
1298 | qc->complete_fn = ata_scsi_qc_complete; | |
1299 | ||
1300 | if (xlat_func(qc, scsicmd)) | |
ae006510 | 1301 | goto early_finish; |
1da177e4 LT |
1302 | |
1303 | /* select device, send command to hardware */ | |
1304 | if (ata_qc_issue(qc)) | |
ae006510 | 1305 | goto err_did; |
1da177e4 LT |
1306 | |
1307 | VPRINTK("EXIT\n"); | |
1308 | return; | |
1309 | ||
ae006510 DG |
1310 | early_finish: |
1311 | ata_qc_free(qc); | |
1312 | done(cmd); | |
1313 | DPRINTK("EXIT - early finish (good or error)\n"); | |
1314 | return; | |
1315 | ||
1316 | err_did: | |
1da177e4 | 1317 | ata_qc_free(qc); |
ae006510 DG |
1318 | err_mem: |
1319 | cmd->result = (DID_ERROR << 16); | |
1320 | done(cmd); | |
1321 | DPRINTK("EXIT - internal\n"); | |
1322 | return; | |
1da177e4 LT |
1323 | } |
1324 | ||
1325 | /** | |
1326 | * ata_scsi_rbuf_get - Map response buffer. | |
1327 | * @cmd: SCSI command containing buffer to be mapped. | |
1328 | * @buf_out: Pointer to mapped area. | |
1329 | * | |
1330 | * Maps buffer contained within SCSI command @cmd. | |
1331 | * | |
1332 | * LOCKING: | |
1333 | * spin_lock_irqsave(host_set lock) | |
1334 | * | |
1335 | * RETURNS: | |
1336 | * Length of response buffer. | |
1337 | */ | |
1338 | ||
1339 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1340 | { | |
1341 | u8 *buf; | |
1342 | unsigned int buflen; | |
1343 | ||
1344 | if (cmd->use_sg) { | |
1345 | struct scatterlist *sg; | |
1346 | ||
1347 | sg = (struct scatterlist *) cmd->request_buffer; | |
1348 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
1349 | buflen = sg->length; | |
1350 | } else { | |
1351 | buf = cmd->request_buffer; | |
1352 | buflen = cmd->request_bufflen; | |
1353 | } | |
1354 | ||
1355 | *buf_out = buf; | |
1356 | return buflen; | |
1357 | } | |
1358 | ||
1359 | /** | |
1360 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1361 | * @cmd: SCSI command containing buffer to be unmapped. | |
1362 | * @buf: buffer to unmap | |
1363 | * | |
1364 | * Unmaps response buffer contained within @cmd. | |
1365 | * | |
1366 | * LOCKING: | |
1367 | * spin_lock_irqsave(host_set lock) | |
1368 | */ | |
1369 | ||
1370 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1371 | { | |
1372 | if (cmd->use_sg) { | |
1373 | struct scatterlist *sg; | |
1374 | ||
1375 | sg = (struct scatterlist *) cmd->request_buffer; | |
1376 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | /** | |
1381 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1382 | * @args: device IDENTIFY data / SCSI command of interest. | |
1383 | * @actor: Callback hook for desired SCSI command simulator | |
1384 | * | |
1385 | * Takes care of the hard work of simulating a SCSI command... | |
1386 | * Mapping the response buffer, calling the command's handler, | |
1387 | * and handling the handler's return value. This return value | |
1388 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1389 | * completed successfully (0), or not (in which case cmd->result |
1390 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1391 | * |
1392 | * LOCKING: | |
1393 | * spin_lock_irqsave(host_set lock) | |
1394 | */ | |
1395 | ||
1396 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1397 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1398 | u8 *rbuf, unsigned int buflen)) | |
1399 | { | |
1400 | u8 *rbuf; | |
1401 | unsigned int buflen, rc; | |
1402 | struct scsi_cmnd *cmd = args->cmd; | |
1403 | ||
1404 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1405 | memset(rbuf, 0, buflen); | |
1406 | rc = actor(args, rbuf, buflen); | |
1407 | ata_scsi_rbuf_put(cmd, rbuf); | |
1408 | ||
ae006510 | 1409 | if (rc == 0) |
1da177e4 | 1410 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1411 | args->done(cmd); |
1da177e4 LT |
1412 | } |
1413 | ||
1414 | /** | |
1415 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1416 | * @args: device IDENTIFY data / SCSI command of interest. | |
1417 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1418 | * @buflen: Response buffer length. | |
1419 | * | |
1420 | * Returns standard device identification data associated | |
1421 | * with non-EVPD INQUIRY command output. | |
1422 | * | |
1423 | * LOCKING: | |
1424 | * spin_lock_irqsave(host_set lock) | |
1425 | */ | |
1426 | ||
1427 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1428 | unsigned int buflen) | |
1429 | { | |
1430 | u8 hdr[] = { | |
1431 | TYPE_DISK, | |
1432 | 0, | |
1433 | 0x5, /* claim SPC-3 version compatibility */ | |
1434 | 2, | |
1435 | 95 - 4 | |
1436 | }; | |
1437 | ||
1438 | /* set scsi removeable (RMB) bit per ata bit */ | |
1439 | if (ata_id_removeable(args->id)) | |
1440 | hdr[1] |= (1 << 7); | |
1441 | ||
1442 | VPRINTK("ENTER\n"); | |
1443 | ||
1444 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1445 | ||
1446 | if (buflen > 35) { | |
1447 | memcpy(&rbuf[8], "ATA ", 8); | |
1448 | ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); | |
1449 | ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1450 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1451 | memcpy(&rbuf[32], "n/a ", 4); | |
1452 | } | |
1453 | ||
1454 | if (buflen > 63) { | |
1455 | const u8 versions[] = { | |
1456 | 0x60, /* SAM-3 (no version claimed) */ | |
1457 | ||
1458 | 0x03, | |
1459 | 0x20, /* SBC-2 (no version claimed) */ | |
1460 | ||
1461 | 0x02, | |
1462 | 0x60 /* SPC-3 (no version claimed) */ | |
1463 | }; | |
1464 | ||
1465 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1466 | } | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | /** | |
1472 | * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages | |
1473 | * @args: device IDENTIFY data / SCSI command of interest. | |
1474 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1475 | * @buflen: Response buffer length. | |
1476 | * | |
1477 | * Returns list of inquiry EVPD pages available. | |
1478 | * | |
1479 | * LOCKING: | |
1480 | * spin_lock_irqsave(host_set lock) | |
1481 | */ | |
1482 | ||
1483 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1484 | unsigned int buflen) | |
1485 | { | |
1486 | const u8 pages[] = { | |
1487 | 0x00, /* page 0x00, this page */ | |
1488 | 0x80, /* page 0x80, unit serial no page */ | |
1489 | 0x83 /* page 0x83, device ident page */ | |
1490 | }; | |
1491 | rbuf[3] = sizeof(pages); /* number of supported EVPD pages */ | |
1492 | ||
1493 | if (buflen > 6) | |
1494 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number | |
1501 | * @args: device IDENTIFY data / SCSI command of interest. | |
1502 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1503 | * @buflen: Response buffer length. | |
1504 | * | |
1505 | * Returns ATA device serial number. | |
1506 | * | |
1507 | * LOCKING: | |
1508 | * spin_lock_irqsave(host_set lock) | |
1509 | */ | |
1510 | ||
1511 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1512 | unsigned int buflen) | |
1513 | { | |
1514 | const u8 hdr[] = { | |
1515 | 0, | |
1516 | 0x80, /* this page code */ | |
1517 | 0, | |
1518 | ATA_SERNO_LEN, /* page len */ | |
1519 | }; | |
1520 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1521 | ||
1522 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
1523 | ata_dev_id_string(args->id, (unsigned char *) &rbuf[4], | |
1524 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1525 | ||
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | static const char *inq_83_str = "Linux ATA-SCSI simulator"; | |
1530 | ||
1531 | /** | |
1532 | * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity | |
1533 | * @args: device IDENTIFY data / SCSI command of interest. | |
1534 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1535 | * @buflen: Response buffer length. | |
1536 | * | |
1537 | * Returns device identification. Currently hardcoded to | |
1538 | * return "Linux ATA-SCSI simulator". | |
1539 | * | |
1540 | * LOCKING: | |
1541 | * spin_lock_irqsave(host_set lock) | |
1542 | */ | |
1543 | ||
1544 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1545 | unsigned int buflen) | |
1546 | { | |
1547 | rbuf[1] = 0x83; /* this page code */ | |
1548 | rbuf[3] = 4 + strlen(inq_83_str); /* page len */ | |
1549 | ||
1550 | /* our one and only identification descriptor (vendor-specific) */ | |
1551 | if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) { | |
1552 | rbuf[4 + 0] = 2; /* code set: ASCII */ | |
1553 | rbuf[4 + 3] = strlen(inq_83_str); | |
1554 | memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str)); | |
1555 | } | |
1556 | ||
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | /** | |
0cba632b | 1561 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1562 | * @args: device IDENTIFY data / SCSI command of interest. |
1563 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1564 | * @buflen: Response buffer length. | |
1565 | * | |
1566 | * No operation. Simply returns success to caller, to indicate | |
1567 | * that the caller should successfully complete this SCSI command. | |
1568 | * | |
1569 | * LOCKING: | |
1570 | * spin_lock_irqsave(host_set lock) | |
1571 | */ | |
1572 | ||
1573 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1574 | unsigned int buflen) | |
1575 | { | |
1576 | VPRINTK("ENTER\n"); | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | /** | |
1581 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1582 | * @ptr_io: (input/output) Location to store more output data | |
1583 | * @last: End of output data buffer | |
1584 | * @buf: Pointer to BLOB being added to output buffer | |
1585 | * @buflen: Length of BLOB | |
1586 | * | |
1587 | * Store MODE SENSE data on an output buffer. | |
1588 | * | |
1589 | * LOCKING: | |
1590 | * None. | |
1591 | */ | |
1592 | ||
1593 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1594 | const u8 *buf, unsigned int buflen) | |
1595 | { | |
1596 | u8 *ptr = *ptr_io; | |
1597 | ||
1598 | if ((ptr + buflen - 1) > last) | |
1599 | return; | |
1600 | ||
1601 | memcpy(ptr, buf, buflen); | |
1602 | ||
1603 | ptr += buflen; | |
1604 | ||
1605 | *ptr_io = ptr; | |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1610 | * @id: device IDENTIFY data | |
1611 | * @ptr_io: (input/output) Location to store more output data | |
1612 | * @last: End of output data buffer | |
1613 | * | |
1614 | * Generate a caching info page, which conditionally indicates | |
1615 | * write caching to the SCSI layer, depending on device | |
1616 | * capabilities. | |
1617 | * | |
1618 | * LOCKING: | |
1619 | * None. | |
1620 | */ | |
1621 | ||
1622 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1623 | const u8 *last) | |
1624 | { | |
00ac37f5 | 1625 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1626 | |
00ac37f5 | 1627 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1628 | if (ata_id_wcache_enabled(id)) |
1629 | page[2] |= (1 << 2); /* write cache enable */ | |
1630 | if (!ata_id_rahead_enabled(id)) | |
1631 | page[12] |= (1 << 5); /* disable read ahead */ | |
1632 | ||
1633 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1634 | return sizeof(page); | |
1635 | } | |
1636 | ||
1637 | /** | |
1638 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1639 | * @dev: Device associated with this MODE SENSE command | |
1640 | * @ptr_io: (input/output) Location to store more output data | |
1641 | * @last: End of output data buffer | |
1642 | * | |
1643 | * Generate a generic MODE SENSE control mode page. | |
1644 | * | |
1645 | * LOCKING: | |
1646 | * None. | |
1647 | */ | |
1648 | ||
1649 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1650 | { | |
00ac37f5 DG |
1651 | ata_msense_push(ptr_io, last, def_control_mpage, |
1652 | sizeof(def_control_mpage)); | |
1653 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1654 | } |
1655 | ||
1656 | /** | |
1657 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1658 | * @dev: Device associated with this MODE SENSE command | |
1659 | * @ptr_io: (input/output) Location to store more output data | |
1660 | * @last: End of output data buffer | |
1661 | * | |
1662 | * Generate a generic MODE SENSE r/w error recovery page. | |
1663 | * | |
1664 | * LOCKING: | |
1665 | * None. | |
1666 | */ | |
1667 | ||
1668 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1669 | { | |
1da177e4 | 1670 | |
00ac37f5 DG |
1671 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
1672 | sizeof(def_rw_recovery_mpage)); | |
1673 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
1674 | } |
1675 | ||
1676 | /** | |
1677 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1678 | * @args: device IDENTIFY data / SCSI command of interest. | |
1679 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1680 | * @buflen: Response buffer length. | |
1681 | * | |
00ac37f5 DG |
1682 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
1683 | * access devices (e.g. disks) only. There should be no block | |
1684 | * descriptor for other device types. | |
1da177e4 LT |
1685 | * |
1686 | * LOCKING: | |
1687 | * spin_lock_irqsave(host_set lock) | |
1688 | */ | |
1689 | ||
1690 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1691 | unsigned int buflen) | |
1692 | { | |
1693 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
00ac37f5 DG |
1694 | const u8 sat_blk_desc[] = { |
1695 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
1696 | 0, | |
1697 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
1698 | }; | |
1699 | u8 pg, spg; | |
1700 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
1da177e4 LT |
1701 | |
1702 | VPRINTK("ENTER\n"); | |
1703 | ||
1704 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
1705 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
1706 | /* | |
1707 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 1708 | */ |
00ac37f5 | 1709 | |
1da177e4 | 1710 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
1711 | switch (page_control) { |
1712 | case 0: /* current */ | |
1713 | break; /* supported */ | |
1714 | case 3: /* saved */ | |
1715 | goto saving_not_supp; | |
1716 | case 1: /* changeable */ | |
1717 | case 2: /* defaults */ | |
1718 | default: | |
1719 | goto invalid_fld; | |
1720 | } | |
1da177e4 | 1721 | |
00ac37f5 DG |
1722 | if (six_byte) { |
1723 | output_len = 4 + (ebd ? 8 : 0); | |
1724 | alloc_len = scsicmd[4]; | |
1725 | } else { | |
1726 | output_len = 8 + (ebd ? 8 : 0); | |
1727 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
1728 | } | |
1729 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
1730 | |
1731 | p = rbuf + output_len; | |
00ac37f5 | 1732 | last = rbuf + minlen - 1; |
1da177e4 | 1733 | |
00ac37f5 DG |
1734 | pg = scsicmd[2] & 0x3f; |
1735 | spg = scsicmd[3]; | |
1736 | /* | |
1737 | * No mode subpages supported (yet) but asking for _all_ | |
1738 | * subpages may be valid | |
1739 | */ | |
1740 | if (spg && (spg != ALL_SUB_MPAGES)) | |
1741 | goto invalid_fld; | |
1742 | ||
1743 | switch(pg) { | |
1744 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
1745 | output_len += ata_msense_rw_recovery(&p, last); |
1746 | break; | |
1747 | ||
00ac37f5 | 1748 | case CACHE_MPAGE: |
1da177e4 LT |
1749 | output_len += ata_msense_caching(args->id, &p, last); |
1750 | break; | |
1751 | ||
00ac37f5 | 1752 | case CONTROL_MPAGE: { |
1da177e4 LT |
1753 | output_len += ata_msense_ctl_mode(&p, last); |
1754 | break; | |
1755 | } | |
1756 | ||
00ac37f5 | 1757 | case ALL_MPAGES: |
1da177e4 LT |
1758 | output_len += ata_msense_rw_recovery(&p, last); |
1759 | output_len += ata_msense_caching(args->id, &p, last); | |
1760 | output_len += ata_msense_ctl_mode(&p, last); | |
1761 | break; | |
1762 | ||
1763 | default: /* invalid page code */ | |
ae006510 | 1764 | goto invalid_fld; |
1da177e4 LT |
1765 | } |
1766 | ||
00ac37f5 DG |
1767 | if (minlen < 1) |
1768 | return 0; | |
1da177e4 LT |
1769 | if (six_byte) { |
1770 | output_len--; | |
1771 | rbuf[0] = output_len; | |
00ac37f5 DG |
1772 | if (ebd) { |
1773 | if (minlen > 3) | |
1774 | rbuf[3] = sizeof(sat_blk_desc); | |
1775 | if (minlen > 11) | |
1776 | memcpy(rbuf + 4, sat_blk_desc, | |
1777 | sizeof(sat_blk_desc)); | |
1778 | } | |
1da177e4 LT |
1779 | } else { |
1780 | output_len -= 2; | |
1781 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
1782 | if (minlen > 1) |
1783 | rbuf[1] = output_len; | |
1784 | if (ebd) { | |
1785 | if (minlen > 7) | |
1786 | rbuf[7] = sizeof(sat_blk_desc); | |
1787 | if (minlen > 15) | |
1788 | memcpy(rbuf + 8, sat_blk_desc, | |
1789 | sizeof(sat_blk_desc)); | |
1790 | } | |
1da177e4 | 1791 | } |
1da177e4 | 1792 | return 0; |
ae006510 DG |
1793 | |
1794 | invalid_fld: | |
1795 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1796 | /* "Invalid field in cbd" */ | |
1797 | return 1; | |
1798 | ||
1799 | saving_not_supp: | |
1800 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
1801 | /* "Saving parameters not supported" */ | |
1802 | return 1; | |
1da177e4 LT |
1803 | } |
1804 | ||
1805 | /** | |
1806 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
1807 | * @args: device IDENTIFY data / SCSI command of interest. | |
1808 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1809 | * @buflen: Response buffer length. | |
1810 | * | |
1811 | * Simulate READ CAPACITY commands. | |
1812 | * | |
1813 | * LOCKING: | |
1814 | * spin_lock_irqsave(host_set lock) | |
1815 | */ | |
1816 | ||
1817 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
1818 | unsigned int buflen) | |
1819 | { | |
1820 | u64 n_sectors; | |
1821 | u32 tmp; | |
1822 | ||
1823 | VPRINTK("ENTER\n"); | |
1824 | ||
8bf62ece AL |
1825 | if (ata_id_has_lba(args->id)) { |
1826 | if (ata_id_has_lba48(args->id)) | |
1827 | n_sectors = ata_id_u64(args->id, 100); | |
1828 | else | |
1829 | n_sectors = ata_id_u32(args->id, 60); | |
1830 | } else { | |
1831 | /* CHS default translation */ | |
1832 | n_sectors = args->id[1] * args->id[3] * args->id[6]; | |
1833 | ||
1834 | if (ata_id_current_chs_valid(args->id)) | |
1835 | /* CHS current translation */ | |
1836 | n_sectors = ata_id_u32(args->id, 57); | |
1837 | } | |
1838 | ||
1da177e4 LT |
1839 | n_sectors--; /* ATA TotalUserSectors - 1 */ |
1840 | ||
1da177e4 | 1841 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
0c144d0d PP |
1842 | if( n_sectors >= 0xffffffffULL ) |
1843 | tmp = 0xffffffff ; /* Return max count on overflow */ | |
1844 | else | |
1845 | tmp = n_sectors ; | |
1846 | ||
1da177e4 LT |
1847 | /* sector count, 32-bit */ |
1848 | rbuf[0] = tmp >> (8 * 3); | |
1849 | rbuf[1] = tmp >> (8 * 2); | |
1850 | rbuf[2] = tmp >> (8 * 1); | |
1851 | rbuf[3] = tmp; | |
1852 | ||
1853 | /* sector size */ | |
1854 | tmp = ATA_SECT_SIZE; | |
1855 | rbuf[6] = tmp >> 8; | |
1856 | rbuf[7] = tmp; | |
1857 | ||
1858 | } else { | |
1859 | /* sector count, 64-bit */ | |
0c144d0d PP |
1860 | tmp = n_sectors >> (8 * 4); |
1861 | rbuf[2] = tmp >> (8 * 3); | |
1862 | rbuf[3] = tmp >> (8 * 2); | |
1863 | rbuf[4] = tmp >> (8 * 1); | |
1864 | rbuf[5] = tmp; | |
1865 | tmp = n_sectors; | |
1da177e4 LT |
1866 | rbuf[6] = tmp >> (8 * 3); |
1867 | rbuf[7] = tmp >> (8 * 2); | |
1868 | rbuf[8] = tmp >> (8 * 1); | |
1869 | rbuf[9] = tmp; | |
1870 | ||
1871 | /* sector size */ | |
1872 | tmp = ATA_SECT_SIZE; | |
1873 | rbuf[12] = tmp >> 8; | |
1874 | rbuf[13] = tmp; | |
1875 | } | |
1876 | ||
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | /** | |
1881 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
1882 | * @args: device IDENTIFY data / SCSI command of interest. | |
1883 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1884 | * @buflen: Response buffer length. | |
1885 | * | |
1886 | * Simulate REPORT LUNS command. | |
1887 | * | |
1888 | * LOCKING: | |
1889 | * spin_lock_irqsave(host_set lock) | |
1890 | */ | |
1891 | ||
1892 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
1893 | unsigned int buflen) | |
1894 | { | |
1895 | VPRINTK("ENTER\n"); | |
1896 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
1897 | ||
1898 | return 0; | |
1899 | } | |
1900 | ||
845c5834 DG |
1901 | /** |
1902 | * ata_scsi_set_sense - Set SCSI sense data and status | |
1903 | * @cmd: SCSI request to be handled | |
1904 | * @sk: SCSI-defined sense key | |
1905 | * @asc: SCSI-defined additional sense code | |
1906 | * @ascq: SCSI-defined additional sense code qualifier | |
1907 | * | |
1908 | * Helper function that builds a valid fixed format, current | |
1909 | * response code and the given sense key (sk), additional sense | |
1910 | * code (asc) and additional sense code qualifier (ascq) with | |
1911 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
1912 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
1913 | * | |
1914 | * LOCKING: | |
1915 | * Not required | |
1916 | */ | |
1917 | ||
1918 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
1919 | { | |
1920 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
1921 | ||
1922 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
1923 | cmd->sense_buffer[2] = sk; | |
1924 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
1925 | cmd->sense_buffer[12] = asc; | |
1926 | cmd->sense_buffer[13] = ascq; | |
1927 | } | |
1928 | ||
1da177e4 LT |
1929 | /** |
1930 | * ata_scsi_badcmd - End a SCSI request with an error | |
1931 | * @cmd: SCSI request to be handled | |
1932 | * @done: SCSI command completion function | |
1933 | * @asc: SCSI-defined additional sense code | |
1934 | * @ascq: SCSI-defined additional sense code qualifier | |
1935 | * | |
1936 | * Helper function that completes a SCSI command with | |
1937 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
1938 | * and the specified additional sense codes. | |
1939 | * | |
1940 | * LOCKING: | |
1941 | * spin_lock_irqsave(host_set lock) | |
1942 | */ | |
1943 | ||
1944 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
1945 | { | |
1946 | DPRINTK("ENTER\n"); | |
ae006510 | 1947 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
1948 | |
1949 | done(cmd); | |
1950 | } | |
1951 | ||
a939c963 JG |
1952 | void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, |
1953 | struct scsi_cmnd *cmd) | |
1954 | { | |
1955 | DECLARE_COMPLETION(wait); | |
1956 | struct ata_queued_cmd *qc; | |
1957 | unsigned long flags; | |
1958 | int rc; | |
1959 | ||
1960 | DPRINTK("ATAPI request sense\n"); | |
1961 | ||
1962 | qc = ata_qc_new_init(ap, dev); | |
1963 | BUG_ON(qc == NULL); | |
1964 | ||
1965 | /* FIXME: is this needed? */ | |
1966 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
1967 | ||
1968 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); | |
1969 | qc->dma_dir = DMA_FROM_DEVICE; | |
1970 | ||
1971 | memset(&qc->cdb, 0, ap->cdb_len); | |
1972 | qc->cdb[0] = REQUEST_SENSE; | |
1973 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
1974 | ||
1975 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1976 | qc->tf.command = ATA_CMD_PACKET; | |
1977 | ||
1978 | qc->tf.protocol = ATA_PROT_ATAPI; | |
1979 | qc->tf.lbam = (8 * 1024) & 0xff; | |
1980 | qc->tf.lbah = (8 * 1024) >> 8; | |
1981 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; | |
1982 | ||
1983 | qc->waiting = &wait; | |
1984 | qc->complete_fn = ata_qc_complete_noop; | |
1985 | ||
1986 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
1987 | rc = ata_qc_issue(qc); | |
1988 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1989 | ||
1990 | if (rc) | |
1991 | ata_port_disable(ap); | |
1992 | else | |
1993 | wait_for_completion(&wait); | |
1994 | ||
1995 | DPRINTK("EXIT\n"); | |
1996 | } | |
1997 | ||
1da177e4 LT |
1998 | static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) |
1999 | { | |
2000 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2001 | ||
e12669e7 JG |
2002 | VPRINTK("ENTER, drv_stat == 0x%x\n", drv_stat); |
2003 | ||
a15dbeb4 | 2004 | if (unlikely(drv_stat & (ATA_BUSY | ATA_DRQ))) |
422fa08e JG |
2005 | /* FIXME: not quite right; we don't want the |
2006 | * translation of taskfile registers into | |
2007 | * a sense descriptors, since that's only | |
2008 | * correct for ATA, not ATAPI | |
2009 | */ | |
2010 | ata_gen_ata_desc_sense(qc); | |
e12669e7 | 2011 | |
a15dbeb4 | 2012 | else if (unlikely(drv_stat & ATA_ERR)) { |
1da177e4 LT |
2013 | DPRINTK("request check condition\n"); |
2014 | ||
a15dbeb4 JG |
2015 | /* FIXME: command completion with check condition |
2016 | * but no sense causes the error handler to run, | |
2017 | * which then issues REQUEST SENSE, fills in the sense | |
2018 | * buffer, and completes the command (for the second | |
2019 | * time). We need to issue REQUEST SENSE some other | |
2020 | * way, to avoid completing the command twice. | |
2021 | */ | |
1da177e4 LT |
2022 | cmd->result = SAM_STAT_CHECK_CONDITION; |
2023 | ||
2024 | qc->scsidone(cmd); | |
2025 | ||
2026 | return 1; | |
e12669e7 JG |
2027 | } |
2028 | ||
2029 | else { | |
1da177e4 LT |
2030 | u8 *scsicmd = cmd->cmnd; |
2031 | ||
2032 | if (scsicmd[0] == INQUIRY) { | |
2033 | u8 *buf = NULL; | |
2034 | unsigned int buflen; | |
2035 | ||
2036 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2037 | |
2038 | /* ATAPI devices typically report zero for their SCSI version, | |
2039 | * and sometimes deviate from the spec WRT response data | |
2040 | * format. If SCSI version is reported as zero like normal, | |
2041 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2042 | * to indicate to the Linux scsi midlayer this is a modern | |
2043 | * device. 2) Ensure response data format / ATAPI information | |
2044 | * are always correct. | |
2045 | */ | |
2046 | /* FIXME: do we ever override EVPD pages and the like, with | |
2047 | * this code? | |
2048 | */ | |
2049 | if (buf[2] == 0) { | |
2050 | buf[2] = 0x5; | |
2051 | buf[3] = 0x32; | |
2052 | } | |
2053 | ||
1da177e4 LT |
2054 | ata_scsi_rbuf_put(cmd, buf); |
2055 | } | |
a15dbeb4 | 2056 | |
1da177e4 LT |
2057 | cmd->result = SAM_STAT_GOOD; |
2058 | } | |
2059 | ||
2060 | qc->scsidone(cmd); | |
1da177e4 LT |
2061 | return 0; |
2062 | } | |
2063 | /** | |
2064 | * atapi_xlat - Initialize PACKET taskfile | |
2065 | * @qc: command structure to be initialized | |
2066 | * @scsicmd: SCSI CDB associated with this PACKET command | |
2067 | * | |
2068 | * LOCKING: | |
2069 | * spin_lock_irqsave(host_set lock) | |
2070 | * | |
2071 | * RETURNS: | |
2072 | * Zero on success, non-zero on failure. | |
2073 | */ | |
2074 | ||
057ace5e | 2075 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
1da177e4 LT |
2076 | { |
2077 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2078 | struct ata_device *dev = qc->dev; | |
2079 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
0274aa25 | 2080 | int nodata = (cmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
2081 | |
2082 | if (!using_pio) | |
2083 | /* Check whether ATAPI DMA is safe */ | |
2084 | if (ata_check_atapi_dma(qc)) | |
2085 | using_pio = 1; | |
2086 | ||
2087 | memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len); | |
2088 | ||
2089 | qc->complete_fn = atapi_qc_complete; | |
2090 | ||
2091 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
0274aa25 | 2092 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2093 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2094 | DPRINTK("direction: write\n"); | |
2095 | } | |
2096 | ||
2097 | qc->tf.command = ATA_CMD_PACKET; | |
2098 | ||
2099 | /* no data, or PIO data xfer */ | |
2100 | if (using_pio || nodata) { | |
2101 | if (nodata) | |
2102 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2103 | else | |
2104 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2105 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2106 | qc->tf.lbah = (8 * 1024) >> 8; | |
2107 | } | |
2108 | ||
2109 | /* DMA data xfer */ | |
2110 | else { | |
2111 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2112 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2113 | ||
2114 | #ifdef ATAPI_ENABLE_DMADIR | |
2115 | /* some SATA bridges need us to indicate data xfer direction */ | |
0274aa25 | 2116 | if (cmd->sc_data_direction != DMA_TO_DEVICE) |
1da177e4 LT |
2117 | qc->tf.feature |= ATAPI_DMADIR; |
2118 | #endif | |
2119 | } | |
2120 | ||
2121 | qc->nbytes = cmd->bufflen; | |
2122 | ||
2123 | return 0; | |
2124 | } | |
2125 | ||
2126 | /** | |
2127 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2128 | * @ap: ATA port to which the device is attached | |
2129 | * @scsidev: SCSI device from which we derive the ATA device | |
2130 | * | |
2131 | * Given various information provided in struct scsi_cmnd, | |
2132 | * map that onto an ATA bus, and using that mapping | |
2133 | * determine which ata_device is associated with the | |
2134 | * SCSI command to be sent. | |
2135 | * | |
2136 | * LOCKING: | |
2137 | * spin_lock_irqsave(host_set lock) | |
2138 | * | |
2139 | * RETURNS: | |
2140 | * Associated ATA device, or %NULL if not found. | |
2141 | */ | |
2142 | ||
2143 | static struct ata_device * | |
057ace5e | 2144 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 LT |
2145 | { |
2146 | struct ata_device *dev; | |
2147 | ||
2148 | /* skip commands not addressed to targets we simulate */ | |
2149 | if (likely(scsidev->id < ATA_MAX_DEVICES)) | |
2150 | dev = &ap->device[scsidev->id]; | |
2151 | else | |
2152 | return NULL; | |
2153 | ||
2154 | if (unlikely((scsidev->channel != 0) || | |
2155 | (scsidev->lun != 0))) | |
2156 | return NULL; | |
2157 | ||
2158 | if (unlikely(!ata_dev_present(dev))) | |
2159 | return NULL; | |
2160 | ||
6f106233 | 2161 | if (!atapi_enabled) { |
1623c81e JG |
2162 | if (unlikely(dev->class == ATA_DEV_ATAPI)) |
2163 | return NULL; | |
2164 | } | |
1da177e4 LT |
2165 | |
2166 | return dev; | |
2167 | } | |
2168 | ||
b095518e JG |
2169 | /* |
2170 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2171 | * @byte1: Byte 1 from pass-thru CDB. | |
2172 | * | |
2173 | * RETURNS: | |
2174 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2175 | */ | |
2176 | static u8 | |
2177 | ata_scsi_map_proto(u8 byte1) | |
2178 | { | |
2179 | switch((byte1 & 0x1e) >> 1) { | |
2180 | case 3: /* Non-data */ | |
2181 | return ATA_PROT_NODATA; | |
2182 | ||
2183 | case 6: /* DMA */ | |
2184 | return ATA_PROT_DMA; | |
2185 | ||
2186 | case 4: /* PIO Data-in */ | |
2187 | case 5: /* PIO Data-out */ | |
2188 | if (byte1 & 0xe0) { | |
2189 | return ATA_PROT_PIO_MULT; | |
2190 | } | |
2191 | return ATA_PROT_PIO; | |
2192 | ||
2193 | case 10: /* Device Reset */ | |
2194 | case 0: /* Hard Reset */ | |
2195 | case 1: /* SRST */ | |
2196 | case 2: /* Bus Idle */ | |
2197 | case 7: /* Packet */ | |
2198 | case 8: /* DMA Queued */ | |
2199 | case 9: /* Device Diagnostic */ | |
2200 | case 11: /* UDMA Data-in */ | |
2201 | case 12: /* UDMA Data-Out */ | |
2202 | case 13: /* FPDMA */ | |
2203 | default: /* Reserved */ | |
2204 | break; | |
2205 | } | |
2206 | ||
2207 | return ATA_PROT_UNKNOWN; | |
2208 | } | |
2209 | ||
2210 | /** | |
2211 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2212 | * @qc: command structure to be initialized | |
2213 | * @cmd: SCSI command to convert | |
2214 | * | |
2215 | * Handles either 12 or 16-byte versions of the CDB. | |
2216 | * | |
2217 | * RETURNS: | |
2218 | * Zero on success, non-zero on failure. | |
2219 | */ | |
2220 | static unsigned int | |
00ac37f5 | 2221 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd) |
b095518e JG |
2222 | { |
2223 | struct ata_taskfile *tf = &(qc->tf); | |
2224 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2225 | ||
2226 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) | |
2227 | return 1; | |
2228 | ||
2229 | /* | |
2230 | * 12 and 16 byte CDBs use different offsets to | |
2231 | * provide the various register values. | |
2232 | */ | |
2233 | if (scsicmd[0] == ATA_16) { | |
2234 | /* | |
2235 | * 16-byte CDB - may contain extended commands. | |
2236 | * | |
2237 | * If that is the case, copy the upper byte register values. | |
2238 | */ | |
2239 | if (scsicmd[1] & 0x01) { | |
2240 | tf->hob_feature = scsicmd[3]; | |
2241 | tf->hob_nsect = scsicmd[5]; | |
2242 | tf->hob_lbal = scsicmd[7]; | |
2243 | tf->hob_lbam = scsicmd[9]; | |
2244 | tf->hob_lbah = scsicmd[11]; | |
2245 | tf->flags |= ATA_TFLAG_LBA48; | |
2246 | } else | |
2247 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2248 | ||
2249 | /* | |
2250 | * Always copy low byte, device and command registers. | |
2251 | */ | |
2252 | tf->feature = scsicmd[4]; | |
2253 | tf->nsect = scsicmd[6]; | |
2254 | tf->lbal = scsicmd[8]; | |
2255 | tf->lbam = scsicmd[10]; | |
2256 | tf->lbah = scsicmd[12]; | |
2257 | tf->device = scsicmd[13]; | |
2258 | tf->command = scsicmd[14]; | |
2259 | } else { | |
2260 | /* | |
2261 | * 12-byte CDB - incapable of extended commands. | |
2262 | */ | |
2263 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2264 | ||
2265 | tf->feature = scsicmd[3]; | |
2266 | tf->nsect = scsicmd[4]; | |
2267 | tf->lbal = scsicmd[5]; | |
2268 | tf->lbam = scsicmd[6]; | |
2269 | tf->lbah = scsicmd[7]; | |
2270 | tf->device = scsicmd[8]; | |
2271 | tf->command = scsicmd[9]; | |
2272 | } | |
2273 | ||
2274 | /* | |
2275 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2276 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2277 | * by an update to hardware-specific registers for each | |
2278 | * controller (i.e. the reason for ->set_piomode(), | |
2279 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2280 | */ | |
2281 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2282 | && (tf->feature == SETFEATURES_XFER)) | |
2283 | return 1; | |
2284 | ||
2285 | /* | |
2286 | * Set flags so that all registers will be written, | |
2287 | * and pass on write indication (used for PIO/DMA | |
2288 | * setup.) | |
2289 | */ | |
2290 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2291 | ||
0274aa25 | 2292 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2293 | tf->flags |= ATA_TFLAG_WRITE; |
2294 | ||
2295 | /* | |
2296 | * Set transfer length. | |
2297 | * | |
2298 | * TODO: find out if we need to do more here to | |
2299 | * cover scatter/gather case. | |
2300 | */ | |
2301 | qc->nsect = cmd->bufflen / ATA_SECT_SIZE; | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
1da177e4 LT |
2306 | /** |
2307 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2308 | * @dev: ATA device | |
2309 | * @cmd: SCSI command opcode to consider | |
2310 | * | |
2311 | * Look up the SCSI command given, and determine whether the | |
2312 | * SCSI command is to be translated or simulated. | |
2313 | * | |
2314 | * RETURNS: | |
2315 | * Pointer to translation function if possible, %NULL if not. | |
2316 | */ | |
2317 | ||
2318 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2319 | { | |
2320 | switch (cmd) { | |
2321 | case READ_6: | |
2322 | case READ_10: | |
2323 | case READ_16: | |
2324 | ||
2325 | case WRITE_6: | |
2326 | case WRITE_10: | |
2327 | case WRITE_16: | |
2328 | return ata_scsi_rw_xlat; | |
2329 | ||
2330 | case SYNCHRONIZE_CACHE: | |
2331 | if (ata_try_flush_cache(dev)) | |
2332 | return ata_scsi_flush_xlat; | |
2333 | break; | |
2334 | ||
2335 | case VERIFY: | |
2336 | case VERIFY_16: | |
2337 | return ata_scsi_verify_xlat; | |
b095518e JG |
2338 | |
2339 | case ATA_12: | |
2340 | case ATA_16: | |
2341 | return ata_scsi_pass_thru; | |
da61396d | 2342 | |
972dcafb DG |
2343 | case START_STOP: |
2344 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2345 | } |
2346 | ||
2347 | return NULL; | |
2348 | } | |
2349 | ||
2350 | /** | |
2351 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2352 | * @ap: ATA port to which the command was being sent | |
2353 | * @cmd: SCSI command to dump | |
2354 | * | |
2355 | * Prints the contents of a SCSI command via printk(). | |
2356 | */ | |
2357 | ||
2358 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2359 | struct scsi_cmnd *cmd) | |
2360 | { | |
2361 | #ifdef ATA_DEBUG | |
2362 | struct scsi_device *scsidev = cmd->device; | |
2363 | u8 *scsicmd = cmd->cmnd; | |
2364 | ||
2365 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2366 | ap->id, | |
2367 | scsidev->channel, scsidev->id, scsidev->lun, | |
2368 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2369 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2370 | scsicmd[8]); | |
2371 | #endif | |
2372 | } | |
2373 | ||
2374 | /** | |
2375 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2376 | * @cmd: SCSI command to be sent | |
2377 | * @done: Completion function, called when command is complete | |
2378 | * | |
2379 | * In some cases, this function translates SCSI commands into | |
2380 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2381 | * hardware. In other cases, this function simulates a | |
2382 | * SCSI device by evaluating and responding to certain | |
2383 | * SCSI commands. This creates the overall effect of | |
2384 | * ATA and ATAPI devices appearing as SCSI devices. | |
2385 | * | |
2386 | * LOCKING: | |
2387 | * Releases scsi-layer-held lock, and obtains host_set lock. | |
2388 | * | |
2389 | * RETURNS: | |
2390 | * Zero. | |
2391 | */ | |
2392 | ||
2393 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
2394 | { | |
2395 | struct ata_port *ap; | |
2396 | struct ata_device *dev; | |
2397 | struct scsi_device *scsidev = cmd->device; | |
2398 | ||
2399 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
2400 | ||
2401 | ata_scsi_dump_cdb(ap, cmd); | |
2402 | ||
2403 | dev = ata_scsi_find_dev(ap, scsidev); | |
2404 | if (unlikely(!dev)) { | |
2405 | cmd->result = (DID_BAD_TARGET << 16); | |
2406 | done(cmd); | |
2407 | goto out_unlock; | |
2408 | } | |
2409 | ||
2410 | if (dev->class == ATA_DEV_ATA) { | |
2411 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
2412 | cmd->cmnd[0]); | |
2413 | ||
2414 | if (xlat_func) | |
2415 | ata_scsi_translate(ap, dev, cmd, done, xlat_func); | |
2416 | else | |
2417 | ata_scsi_simulate(dev->id, cmd, done); | |
2418 | } else | |
2419 | ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); | |
2420 | ||
2421 | out_unlock: | |
2422 | return 0; | |
2423 | } | |
2424 | ||
2425 | /** | |
2426 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
2427 | * @id: current IDENTIFY data for target device. | |
2428 | * @cmd: SCSI command being sent to device. | |
2429 | * @done: SCSI command completion function. | |
2430 | * | |
2431 | * Interprets and directly executes a select list of SCSI commands | |
2432 | * that can be handled internally. | |
2433 | * | |
2434 | * LOCKING: | |
2435 | * spin_lock_irqsave(host_set lock) | |
2436 | */ | |
2437 | ||
2438 | void ata_scsi_simulate(u16 *id, | |
2439 | struct scsi_cmnd *cmd, | |
2440 | void (*done)(struct scsi_cmnd *)) | |
2441 | { | |
2442 | struct ata_scsi_args args; | |
057ace5e | 2443 | const u8 *scsicmd = cmd->cmnd; |
1da177e4 LT |
2444 | |
2445 | args.id = id; | |
2446 | args.cmd = cmd; | |
2447 | args.done = done; | |
2448 | ||
2449 | switch(scsicmd[0]) { | |
2450 | /* no-op's, complete with success */ | |
2451 | case SYNCHRONIZE_CACHE: | |
2452 | case REZERO_UNIT: | |
2453 | case SEEK_6: | |
2454 | case SEEK_10: | |
2455 | case TEST_UNIT_READY: | |
2456 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2457 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2458 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2459 | break; | |
2460 | ||
2461 | case INQUIRY: | |
2462 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 2463 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2464 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2465 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2466 | else if (scsicmd[2] == 0x00) | |
2467 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2468 | else if (scsicmd[2] == 0x80) | |
2469 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2470 | else if (scsicmd[2] == 0x83) | |
2471 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2472 | else | |
ae006510 | 2473 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2474 | break; |
2475 | ||
2476 | case MODE_SENSE: | |
2477 | case MODE_SENSE_10: | |
2478 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2479 | break; | |
2480 | ||
2481 | case MODE_SELECT: /* unconditionally return */ | |
2482 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 2483 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2484 | break; |
2485 | ||
2486 | case READ_CAPACITY: | |
2487 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2488 | break; | |
2489 | ||
2490 | case SERVICE_ACTION_IN: | |
2491 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2492 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2493 | else | |
ae006510 | 2494 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2495 | break; |
2496 | ||
2497 | case REPORT_LUNS: | |
2498 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2499 | break; | |
2500 | ||
b095518e | 2501 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2502 | case REQUEST_SENSE: |
2503 | ||
2504 | /* all other commands */ | |
2505 | default: | |
ae006510 DG |
2506 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
2507 | /* "Invalid command operation code" */ | |
2508 | done(cmd); | |
1da177e4 LT |
2509 | break; |
2510 | } | |
2511 | } | |
2512 | ||
644dd0cc JG |
2513 | void ata_scsi_scan_host(struct ata_port *ap) |
2514 | { | |
3f19ee8c | 2515 | struct ata_device *dev; |
644dd0cc JG |
2516 | unsigned int i; |
2517 | ||
2518 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
2519 | return; | |
2520 | ||
3f19ee8c JG |
2521 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2522 | dev = &ap->device[i]; | |
2523 | ||
2524 | if (ata_dev_present(dev)) | |
2525 | scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); | |
2526 | } | |
644dd0cc JG |
2527 | } |
2528 |