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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> | |
43 | #include <asm/uaccess.h> | |
44 | ||
45 | #include "libata.h" | |
46 | ||
47 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd); | |
48 | static struct ata_device * | |
49 | ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev); | |
50 | ||
51 | ||
ae006510 DG |
52 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
53 | void (*done)(struct scsi_cmnd *)) | |
54 | { | |
55 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
56 | /* "Invalid field in cbd" */ | |
57 | done(cmd); | |
58 | } | |
59 | ||
1da177e4 LT |
60 | /** |
61 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
62 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
63 | * @bdev: block device associated with @sdev | |
64 | * @capacity: capacity of SCSI device | |
65 | * @geom: location to which geometry will be output | |
66 | * | |
67 | * Generic bios head/sector/cylinder calculator | |
68 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
69 | * mapping. Some situations may arise where the disk is not | |
70 | * bootable if this is not used. | |
71 | * | |
72 | * LOCKING: | |
73 | * Defined by the SCSI layer. We don't really care. | |
74 | * | |
75 | * RETURNS: | |
76 | * Zero. | |
77 | */ | |
78 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
79 | sector_t capacity, int geom[]) | |
80 | { | |
81 | geom[0] = 255; | |
82 | geom[1] = 63; | |
83 | sector_div(capacity, 255*63); | |
84 | geom[2] = capacity; | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
90 | { | |
91 | struct ata_port *ap; | |
92 | struct ata_device *dev; | |
93 | int val = -EINVAL, rc = -EINVAL; | |
94 | ||
95 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
96 | if (!ap) | |
97 | goto out; | |
98 | ||
99 | dev = ata_scsi_find_dev(ap, scsidev); | |
100 | if (!dev) { | |
101 | rc = -ENODEV; | |
102 | goto out; | |
103 | } | |
104 | ||
105 | switch (cmd) { | |
106 | case ATA_IOC_GET_IO32: | |
107 | val = 0; | |
108 | if (copy_to_user(arg, &val, 1)) | |
109 | return -EFAULT; | |
110 | return 0; | |
111 | ||
112 | case ATA_IOC_SET_IO32: | |
113 | val = (unsigned long) arg; | |
114 | if (val != 0) | |
115 | return -EINVAL; | |
116 | return 0; | |
117 | ||
118 | default: | |
119 | rc = -ENOTTY; | |
120 | break; | |
121 | } | |
122 | ||
123 | out: | |
124 | return rc; | |
125 | } | |
126 | ||
127 | /** | |
128 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
129 | * @ap: ATA port to which the new command is attached | |
130 | * @dev: ATA device to which the new command is attached | |
131 | * @cmd: SCSI command that originated this ATA command | |
132 | * @done: SCSI command completion function | |
133 | * | |
134 | * Obtain a reference to an unused ata_queued_cmd structure, | |
135 | * which is the basic libata structure representing a single | |
136 | * ATA command sent to the hardware. | |
137 | * | |
138 | * If a command was available, fill in the SCSI-specific | |
139 | * portions of the structure with information on the | |
140 | * current command. | |
141 | * | |
142 | * LOCKING: | |
143 | * spin_lock_irqsave(host_set lock) | |
144 | * | |
145 | * RETURNS: | |
146 | * Command allocated, or %NULL if none available. | |
147 | */ | |
148 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap, | |
149 | struct ata_device *dev, | |
150 | struct scsi_cmnd *cmd, | |
151 | void (*done)(struct scsi_cmnd *)) | |
152 | { | |
153 | struct ata_queued_cmd *qc; | |
154 | ||
155 | qc = ata_qc_new_init(ap, dev); | |
156 | if (qc) { | |
157 | qc->scsicmd = cmd; | |
158 | qc->scsidone = done; | |
159 | ||
160 | if (cmd->use_sg) { | |
161 | qc->sg = (struct scatterlist *) cmd->request_buffer; | |
162 | qc->n_elem = cmd->use_sg; | |
163 | } else { | |
164 | qc->sg = &qc->sgent; | |
165 | qc->n_elem = 1; | |
166 | } | |
167 | } else { | |
168 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
169 | done(cmd); | |
170 | } | |
171 | ||
172 | return qc; | |
173 | } | |
174 | ||
175 | /** | |
176 | * ata_to_sense_error - convert ATA error to SCSI error | |
177 | * @qc: Command that we are erroring out | |
178 | * @drv_stat: value contained in ATA status register | |
179 | * | |
180 | * Converts an ATA error into a SCSI error. While we are at it | |
181 | * we decode and dump the ATA error for the user so that they | |
182 | * have some idea what really happened at the non make-believe | |
183 | * layer. | |
184 | * | |
185 | * LOCKING: | |
186 | * spin_lock_irqsave(host_set lock) | |
187 | */ | |
188 | ||
189 | void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) | |
190 | { | |
191 | struct scsi_cmnd *cmd = qc->scsicmd; | |
192 | u8 err = 0; | |
1da177e4 LT |
193 | /* Based on the 3ware driver translation table */ |
194 | static unsigned char sense_table[][4] = { | |
195 | /* BBD|ECC|ID|MAR */ | |
196 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
197 | /* BBD|ECC|ID */ | |
198 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
199 | /* ECC|MC|MARK */ | |
200 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
201 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
202 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
203 | /* MC|ID|ABRT|TRK0|MARK */ | |
204 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
205 | /* MCR|MARK */ | |
206 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
207 | /* Bad address mark */ | |
208 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
209 | /* TRK0 */ | |
210 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
211 | /* Abort & !ICRC */ | |
212 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
213 | /* Media change request */ | |
214 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
215 | /* SRV */ | |
216 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
217 | /* Media change */ | |
218 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
219 | /* ECC */ | |
220 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
221 | /* BBD - block marked bad */ | |
222 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
223 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
224 | }; | |
225 | static unsigned char stat_table[][4] = { | |
226 | /* Must be first because BUSY means no other bits valid */ | |
227 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
228 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
229 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
230 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
231 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
232 | }; | |
233 | int i = 0; | |
234 | ||
1da177e4 LT |
235 | /* |
236 | * Is this an error we can process/parse | |
237 | */ | |
238 | ||
239 | if(drv_stat & ATA_ERR) | |
240 | /* Read the err bits */ | |
241 | err = ata_chk_err(qc->ap); | |
242 | ||
243 | /* Display the ATA level error info */ | |
244 | ||
245 | printk(KERN_WARNING "ata%u: status=0x%02x { ", qc->ap->id, drv_stat); | |
246 | if(drv_stat & 0x80) | |
247 | { | |
248 | printk("Busy "); | |
249 | err = 0; /* Data is not valid in this case */ | |
250 | } | |
251 | else { | |
252 | if(drv_stat & 0x40) printk("DriveReady "); | |
253 | if(drv_stat & 0x20) printk("DeviceFault "); | |
254 | if(drv_stat & 0x10) printk("SeekComplete "); | |
255 | if(drv_stat & 0x08) printk("DataRequest "); | |
256 | if(drv_stat & 0x04) printk("CorrectedError "); | |
257 | if(drv_stat & 0x02) printk("Index "); | |
258 | if(drv_stat & 0x01) printk("Error "); | |
259 | } | |
260 | printk("}\n"); | |
261 | ||
262 | if(err) | |
263 | { | |
264 | printk(KERN_WARNING "ata%u: error=0x%02x { ", qc->ap->id, err); | |
265 | if(err & 0x04) printk("DriveStatusError "); | |
266 | if(err & 0x80) | |
267 | { | |
268 | if(err & 0x04) | |
269 | printk("BadCRC "); | |
270 | else | |
271 | printk("Sector "); | |
272 | } | |
273 | if(err & 0x40) printk("UncorrectableError "); | |
274 | if(err & 0x10) printk("SectorIdNotFound "); | |
275 | if(err & 0x02) printk("TrackZeroNotFound "); | |
276 | if(err & 0x01) printk("AddrMarkNotFound "); | |
277 | printk("}\n"); | |
278 | ||
279 | /* Should we dump sector info here too ?? */ | |
280 | } | |
281 | ||
282 | ||
283 | /* Look for err */ | |
284 | while(sense_table[i][0] != 0xFF) | |
285 | { | |
286 | /* Look for best matches first */ | |
287 | if((sense_table[i][0] & err) == sense_table[i][0]) | |
288 | { | |
ae006510 DG |
289 | ata_scsi_set_sense(cmd, sense_table[i][1] /* sk */, |
290 | sense_table[i][2] /* asc */, | |
291 | sense_table[i][3] /* ascq */ ); | |
1da177e4 LT |
292 | return; |
293 | } | |
294 | i++; | |
295 | } | |
296 | /* No immediate match */ | |
297 | if(err) | |
298 | printk(KERN_DEBUG "ata%u: no sense translation for 0x%02x\n", qc->ap->id, err); | |
299 | ||
300 | i = 0; | |
301 | /* Fall back to interpreting status bits */ | |
302 | while(stat_table[i][0] != 0xFF) | |
303 | { | |
304 | if(stat_table[i][0] & drv_stat) | |
305 | { | |
ae006510 DG |
306 | ata_scsi_set_sense(cmd, sense_table[i][1] /* sk */, |
307 | sense_table[i][2] /* asc */, | |
308 | sense_table[i][3] /* ascq */ ); | |
1da177e4 LT |
309 | return; |
310 | } | |
311 | i++; | |
312 | } | |
313 | /* No error ?? */ | |
314 | printk(KERN_ERR "ata%u: called with no error (%02X)!\n", qc->ap->id, drv_stat); | |
315 | /* additional-sense-code[-qualifier] */ | |
316 | ||
be7db055 | 317 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) { |
ae006510 DG |
318 | ata_scsi_set_sense(cmd, MEDIUM_ERROR, 0x11, 0x4); |
319 | /* "unrecovered read error" */ | |
1da177e4 | 320 | } else { |
ae006510 DG |
321 | ata_scsi_set_sense(cmd, MEDIUM_ERROR, 0xc, 0x2); |
322 | /* "write error - auto-reallocation failed" */ | |
1da177e4 LT |
323 | } |
324 | } | |
325 | ||
326 | /** | |
327 | * ata_scsi_slave_config - Set SCSI device attributes | |
328 | * @sdev: SCSI device to examine | |
329 | * | |
330 | * This is called before we actually start reading | |
331 | * and writing to the device, to configure certain | |
332 | * SCSI mid-layer behaviors. | |
333 | * | |
334 | * LOCKING: | |
335 | * Defined by SCSI layer. We don't really care. | |
336 | */ | |
337 | ||
338 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
339 | { | |
340 | sdev->use_10_for_rw = 1; | |
341 | sdev->use_10_for_ms = 1; | |
342 | ||
343 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
344 | ||
345 | if (sdev->id < ATA_MAX_DEVICES) { | |
346 | struct ata_port *ap; | |
347 | struct ata_device *dev; | |
348 | ||
349 | ap = (struct ata_port *) &sdev->host->hostdata[0]; | |
350 | dev = &ap->device[sdev->id]; | |
351 | ||
352 | /* TODO: 1024 is an arbitrary number, not the | |
353 | * hardware maximum. This should be increased to | |
354 | * 65534 when Jens Axboe's patch for dynamically | |
355 | * determining max_sectors is merged. | |
356 | */ | |
357 | if ((dev->flags & ATA_DFLAG_LBA48) && | |
358 | ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) { | |
f85bdb9c JL |
359 | /* |
360 | * do not overwrite sdev->host->max_sectors, since | |
361 | * other drives on this host may not support LBA48 | |
362 | */ | |
1da177e4 LT |
363 | blk_queue_max_sectors(sdev->request_queue, 2048); |
364 | } | |
365 | } | |
366 | ||
367 | return 0; /* scsi layer doesn't check return value, sigh */ | |
368 | } | |
369 | ||
370 | /** | |
371 | * ata_scsi_error - SCSI layer error handler callback | |
372 | * @host: SCSI host on which error occurred | |
373 | * | |
374 | * Handles SCSI-layer-thrown error events. | |
375 | * | |
376 | * LOCKING: | |
377 | * Inherited from SCSI layer (none, can sleep) | |
378 | * | |
379 | * RETURNS: | |
380 | * Zero. | |
381 | */ | |
382 | ||
383 | int ata_scsi_error(struct Scsi_Host *host) | |
384 | { | |
385 | struct ata_port *ap; | |
386 | ||
387 | DPRINTK("ENTER\n"); | |
388 | ||
389 | ap = (struct ata_port *) &host->hostdata[0]; | |
390 | ap->ops->eng_timeout(ap); | |
391 | ||
392 | /* TODO: this is per-command; when queueing is supported | |
393 | * this code will either change or move to a more | |
394 | * appropriate place | |
395 | */ | |
396 | host->host_failed--; | |
42517438 | 397 | INIT_LIST_HEAD(&host->eh_cmd_q); |
1da177e4 LT |
398 | |
399 | DPRINTK("EXIT\n"); | |
400 | return 0; | |
401 | } | |
402 | ||
972dcafb DG |
403 | /** |
404 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
405 | * @qc: Storage for translated ATA taskfile | |
406 | * @scsicmd: SCSI command to translate | |
407 | * | |
408 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
409 | * (to start). Perhaps these commands should be preceded by | |
410 | * CHECK POWER MODE to see what power mode the device is already in. | |
411 | * [See SAT revision 5 at www.t10.org] | |
412 | * | |
413 | * LOCKING: | |
414 | * spin_lock_irqsave(host_set lock) | |
415 | * | |
416 | * RETURNS: | |
417 | * Zero on success, non-zero on error. | |
418 | */ | |
419 | ||
420 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, | |
421 | u8 *scsicmd) | |
422 | { | |
423 | struct ata_taskfile *tf = &qc->tf; | |
424 | ||
425 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
426 | tf->protocol = ATA_PROT_NODATA; | |
427 | if (scsicmd[1] & 0x1) { | |
428 | ; /* ignore IMMED bit, violates sat-r05 */ | |
429 | } | |
430 | if (scsicmd[4] & 0x2) | |
ae006510 | 431 | goto invalid_fld; /* LOEJ bit set not supported */ |
972dcafb | 432 | if (((scsicmd[4] >> 4) & 0xf) != 0) |
ae006510 | 433 | goto invalid_fld; /* power conditions not supported */ |
972dcafb DG |
434 | if (scsicmd[4] & 0x1) { |
435 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
9d5b1302 AL |
436 | |
437 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
438 | qc->tf.flags |= ATA_TFLAG_LBA; | |
439 | ||
440 | tf->lbah = 0x0; | |
441 | tf->lbam = 0x0; | |
442 | tf->lbal = 0x0; | |
443 | tf->device |= ATA_LBA; | |
444 | } else { | |
445 | /* CHS */ | |
446 | tf->lbal = 0x1; /* sect */ | |
447 | tf->lbam = 0x0; /* cyl low */ | |
448 | tf->lbah = 0x0; /* cyl high */ | |
449 | } | |
450 | ||
972dcafb DG |
451 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
452 | } else { | |
453 | tf->nsect = 0; /* time period value (0 implies now) */ | |
454 | tf->command = ATA_CMD_STANDBY; | |
455 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
456 | } | |
457 | /* | |
458 | * Standby and Idle condition timers could be implemented but that | |
459 | * would require libata to implement the Power condition mode page | |
460 | * and allow the user to change it. Changing mode pages requires | |
461 | * MODE SELECT to be implemented. | |
462 | */ | |
463 | ||
464 | return 0; | |
ae006510 DG |
465 | |
466 | invalid_fld: | |
467 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
468 | /* "Invalid field in cbd" */ | |
469 | return 1; | |
972dcafb DG |
470 | } |
471 | ||
472 | ||
1da177e4 LT |
473 | /** |
474 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
475 | * @qc: Storage for translated ATA taskfile | |
476 | * @scsicmd: SCSI command to translate (ignored) | |
477 | * | |
478 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
479 | * FLUSH CACHE EXT. | |
480 | * | |
481 | * LOCKING: | |
482 | * spin_lock_irqsave(host_set lock) | |
483 | * | |
484 | * RETURNS: | |
485 | * Zero on success, non-zero on error. | |
486 | */ | |
487 | ||
488 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
489 | { | |
490 | struct ata_taskfile *tf = &qc->tf; | |
491 | ||
492 | tf->flags |= ATA_TFLAG_DEVICE; | |
493 | tf->protocol = ATA_PROT_NODATA; | |
494 | ||
495 | if ((tf->flags & ATA_TFLAG_LBA48) && | |
496 | (ata_id_has_flush_ext(qc->dev->id))) | |
497 | tf->command = ATA_CMD_FLUSH_EXT; | |
498 | else | |
499 | tf->command = ATA_CMD_FLUSH; | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
3aef5231 AL |
504 | /** |
505 | * scsi_6_lba_len - Get LBA and transfer length | |
506 | * @scsicmd: SCSI command to translate | |
507 | * | |
508 | * Calculate LBA and transfer length for 6-byte commands. | |
509 | * | |
510 | * RETURNS: | |
511 | * @plba: the LBA | |
512 | * @plen: the transfer length | |
513 | */ | |
514 | ||
515 | static void scsi_6_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) | |
516 | { | |
517 | u64 lba = 0; | |
518 | u32 len = 0; | |
519 | ||
520 | VPRINTK("six-byte command\n"); | |
521 | ||
522 | lba |= ((u64)scsicmd[2]) << 8; | |
523 | lba |= ((u64)scsicmd[3]); | |
524 | ||
525 | len |= ((u32)scsicmd[4]); | |
526 | ||
527 | *plba = lba; | |
528 | *plen = len; | |
529 | } | |
530 | ||
531 | /** | |
532 | * scsi_10_lba_len - Get LBA and transfer length | |
533 | * @scsicmd: SCSI command to translate | |
534 | * | |
535 | * Calculate LBA and transfer length for 10-byte commands. | |
536 | * | |
537 | * RETURNS: | |
538 | * @plba: the LBA | |
539 | * @plen: the transfer length | |
540 | */ | |
541 | ||
542 | static void scsi_10_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) | |
543 | { | |
544 | u64 lba = 0; | |
545 | u32 len = 0; | |
546 | ||
547 | VPRINTK("ten-byte command\n"); | |
548 | ||
549 | lba |= ((u64)scsicmd[2]) << 24; | |
550 | lba |= ((u64)scsicmd[3]) << 16; | |
551 | lba |= ((u64)scsicmd[4]) << 8; | |
552 | lba |= ((u64)scsicmd[5]); | |
553 | ||
554 | len |= ((u32)scsicmd[7]) << 8; | |
555 | len |= ((u32)scsicmd[8]); | |
556 | ||
557 | *plba = lba; | |
558 | *plen = len; | |
559 | } | |
560 | ||
561 | /** | |
562 | * scsi_16_lba_len - Get LBA and transfer length | |
563 | * @scsicmd: SCSI command to translate | |
564 | * | |
565 | * Calculate LBA and transfer length for 16-byte commands. | |
566 | * | |
567 | * RETURNS: | |
568 | * @plba: the LBA | |
569 | * @plen: the transfer length | |
570 | */ | |
571 | ||
572 | static void scsi_16_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) | |
573 | { | |
574 | u64 lba = 0; | |
575 | u32 len = 0; | |
576 | ||
577 | VPRINTK("sixteen-byte command\n"); | |
578 | ||
579 | lba |= ((u64)scsicmd[2]) << 56; | |
580 | lba |= ((u64)scsicmd[3]) << 48; | |
581 | lba |= ((u64)scsicmd[4]) << 40; | |
582 | lba |= ((u64)scsicmd[5]) << 32; | |
583 | lba |= ((u64)scsicmd[6]) << 24; | |
584 | lba |= ((u64)scsicmd[7]) << 16; | |
585 | lba |= ((u64)scsicmd[8]) << 8; | |
586 | lba |= ((u64)scsicmd[9]); | |
587 | ||
588 | len |= ((u32)scsicmd[10]) << 24; | |
589 | len |= ((u32)scsicmd[11]) << 16; | |
590 | len |= ((u32)scsicmd[12]) << 8; | |
591 | len |= ((u32)scsicmd[13]); | |
592 | ||
593 | *plba = lba; | |
594 | *plen = len; | |
595 | } | |
596 | ||
1da177e4 LT |
597 | /** |
598 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
599 | * @qc: Storage for translated ATA taskfile | |
600 | * @scsicmd: SCSI command to translate | |
601 | * | |
602 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
603 | * | |
604 | * LOCKING: | |
605 | * spin_lock_irqsave(host_set lock) | |
606 | * | |
607 | * RETURNS: | |
608 | * Zero on success, non-zero on error. | |
609 | */ | |
610 | ||
611 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
612 | { | |
613 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece AL |
614 | struct ata_device *dev = qc->dev; |
615 | unsigned int lba = tf->flags & ATA_TFLAG_LBA; | |
1da177e4 LT |
616 | unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; |
617 | u64 dev_sectors = qc->dev->n_sectors; | |
3aef5231 AL |
618 | u64 block; |
619 | u32 n_block; | |
1da177e4 LT |
620 | |
621 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
622 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 623 | |
3aef5231 AL |
624 | if (scsicmd[0] == VERIFY) |
625 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
626 | else if (scsicmd[0] == VERIFY_16) | |
627 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1da177e4 | 628 | else |
ae006510 | 629 | goto invalid_fld; |
1da177e4 | 630 | |
8bf62ece | 631 | if (!n_block) |
ae006510 | 632 | goto nothing_to_do; |
8bf62ece | 633 | if (block >= dev_sectors) |
ae006510 | 634 | goto out_of_range; |
8bf62ece | 635 | if ((block + n_block) > dev_sectors) |
ae006510 | 636 | goto out_of_range; |
1da177e4 | 637 | if (lba48) { |
8bf62ece | 638 | if (n_block > (64 * 1024)) |
ae006510 | 639 | goto invalid_fld; |
1da177e4 | 640 | } else { |
8bf62ece | 641 | if (n_block > 256) |
ae006510 | 642 | goto invalid_fld; |
1da177e4 LT |
643 | } |
644 | ||
8bf62ece AL |
645 | if (lba) { |
646 | if (lba48) { | |
647 | tf->command = ATA_CMD_VERIFY_EXT; | |
1da177e4 | 648 | |
8bf62ece | 649 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 650 | |
8bf62ece AL |
651 | tf->hob_lbah = (block >> 40) & 0xff; |
652 | tf->hob_lbam = (block >> 32) & 0xff; | |
653 | tf->hob_lbal = (block >> 24) & 0xff; | |
654 | } else { | |
655 | tf->command = ATA_CMD_VERIFY; | |
1da177e4 | 656 | |
8bf62ece AL |
657 | tf->device |= (block >> 24) & 0xf; |
658 | } | |
659 | ||
660 | tf->nsect = n_block & 0xff; | |
1da177e4 | 661 | |
8bf62ece AL |
662 | tf->lbah = (block >> 16) & 0xff; |
663 | tf->lbam = (block >> 8) & 0xff; | |
664 | tf->lbal = block & 0xff; | |
1da177e4 | 665 | |
8bf62ece AL |
666 | tf->device |= ATA_LBA; |
667 | } else { | |
668 | /* CHS */ | |
669 | u32 sect, head, cyl, track; | |
670 | ||
671 | /* Convert LBA to CHS */ | |
672 | track = (u32)block / dev->sectors; | |
673 | cyl = track / dev->heads; | |
674 | head = track % dev->heads; | |
675 | sect = (u32)block % dev->sectors + 1; | |
676 | ||
c187c4b5 AL |
677 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
678 | (u32)block, track, cyl, head, sect); | |
8bf62ece AL |
679 | |
680 | /* Check whether the converted CHS can fit. | |
681 | Cylinder: 0-65535 | |
682 | Head: 0-15 | |
683 | Sector: 1-255*/ | |
684 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
ae006510 | 685 | goto out_of_range; |
8bf62ece AL |
686 | |
687 | tf->command = ATA_CMD_VERIFY; | |
688 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
689 | tf->lbal = sect; | |
690 | tf->lbam = cyl; | |
691 | tf->lbah = cyl >> 8; | |
692 | tf->device |= head; | |
693 | } | |
1da177e4 LT |
694 | |
695 | return 0; | |
ae006510 DG |
696 | |
697 | invalid_fld: | |
698 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
699 | /* "Invalid field in cbd" */ | |
700 | return 1; | |
701 | ||
702 | out_of_range: | |
703 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
704 | /* "Logical Block Address out of range" */ | |
705 | return 1; | |
706 | ||
707 | nothing_to_do: | |
708 | qc->scsicmd->result = SAM_STAT_GOOD; | |
709 | return 1; | |
1da177e4 LT |
710 | } |
711 | ||
712 | /** | |
713 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
714 | * @qc: Storage for translated ATA taskfile | |
715 | * @scsicmd: SCSI command to translate | |
716 | * | |
717 | * Converts any of six SCSI read/write commands into the | |
718 | * ATA counterpart, including starting sector (LBA), | |
719 | * sector count, and taking into account the device's LBA48 | |
720 | * support. | |
721 | * | |
722 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
723 | * %WRITE_16 are currently supported. | |
724 | * | |
725 | * LOCKING: | |
726 | * spin_lock_irqsave(host_set lock) | |
727 | * | |
728 | * RETURNS: | |
729 | * Zero on success, non-zero on error. | |
730 | */ | |
731 | ||
732 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
733 | { | |
734 | struct ata_taskfile *tf = &qc->tf; | |
8bf62ece AL |
735 | struct ata_device *dev = qc->dev; |
736 | unsigned int lba = tf->flags & ATA_TFLAG_LBA; | |
1da177e4 | 737 | unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; |
3aef5231 AL |
738 | u64 block; |
739 | u32 n_block; | |
1da177e4 LT |
740 | |
741 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
742 | tf->protocol = qc->dev->xfer_protocol; | |
1da177e4 LT |
743 | |
744 | if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 || | |
745 | scsicmd[0] == READ_16) { | |
746 | tf->command = qc->dev->read_cmd; | |
747 | } else { | |
748 | tf->command = qc->dev->write_cmd; | |
749 | tf->flags |= ATA_TFLAG_WRITE; | |
750 | } | |
751 | ||
8bf62ece | 752 | /* Calculate the SCSI LBA and transfer length. */ |
3aef5231 AL |
753 | switch (scsicmd[0]) { |
754 | case READ_10: | |
755 | case WRITE_10: | |
756 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
757 | break; | |
758 | case READ_6: | |
759 | case WRITE_6: | |
760 | scsi_6_lba_len(scsicmd, &block, &n_block); | |
c187c4b5 AL |
761 | |
762 | /* for 6-byte r/w commands, transfer length 0 | |
763 | * means 256 blocks of data, not 0 block. | |
764 | */ | |
76b2bf9b JG |
765 | if (!n_block) |
766 | n_block = 256; | |
3aef5231 AL |
767 | break; |
768 | case READ_16: | |
769 | case WRITE_16: | |
770 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
771 | break; | |
772 | default: | |
8bf62ece | 773 | DPRINTK("no-byte command\n"); |
ae006510 | 774 | goto invalid_fld; |
1da177e4 LT |
775 | } |
776 | ||
8bf62ece AL |
777 | /* Check and compose ATA command */ |
778 | if (!n_block) | |
c187c4b5 AL |
779 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
780 | * length 0 means transfer 0 block of data. | |
781 | * However, for ATA R/W commands, sector count 0 means | |
782 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
783 | */ | |
ae006510 | 784 | goto nothing_to_do; |
1da177e4 | 785 | |
8bf62ece | 786 | if (lba) { |
1da177e4 | 787 | if (lba48) { |
8bf62ece AL |
788 | /* The request -may- be too large for LBA48. */ |
789 | if ((block >> 48) || (n_block > 65536)) | |
ae006510 | 790 | goto out_of_range; |
1da177e4 | 791 | |
8bf62ece AL |
792 | tf->hob_nsect = (n_block >> 8) & 0xff; |
793 | ||
794 | tf->hob_lbah = (block >> 40) & 0xff; | |
795 | tf->hob_lbam = (block >> 32) & 0xff; | |
796 | tf->hob_lbal = (block >> 24) & 0xff; | |
797 | } else { | |
798 | /* LBA28 */ | |
1da177e4 | 799 | |
8bf62ece AL |
800 | /* The request -may- be too large for LBA28. */ |
801 | if ((block >> 28) || (n_block > 256)) | |
ae006510 | 802 | goto out_of_range; |
8bf62ece AL |
803 | |
804 | tf->device |= (block >> 24) & 0xf; | |
1da177e4 | 805 | } |
c187c4b5 | 806 | |
8bf62ece AL |
807 | qc->nsect = n_block; |
808 | tf->nsect = n_block & 0xff; | |
1da177e4 | 809 | |
8bf62ece AL |
810 | tf->lbah = (block >> 16) & 0xff; |
811 | tf->lbam = (block >> 8) & 0xff; | |
812 | tf->lbal = block & 0xff; | |
1da177e4 | 813 | |
8bf62ece AL |
814 | tf->device |= ATA_LBA; |
815 | } else { | |
816 | /* CHS */ | |
817 | u32 sect, head, cyl, track; | |
818 | ||
819 | /* The request -may- be too large for CHS addressing. */ | |
820 | if ((block >> 28) || (n_block > 256)) | |
ae006510 | 821 | goto out_of_range; |
c187c4b5 | 822 | |
8bf62ece AL |
823 | /* Convert LBA to CHS */ |
824 | track = (u32)block / dev->sectors; | |
825 | cyl = track / dev->heads; | |
826 | head = track % dev->heads; | |
827 | sect = (u32)block % dev->sectors + 1; | |
828 | ||
c187c4b5 | 829 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
8bf62ece | 830 | (u32)block, track, cyl, head, sect); |
c187c4b5 | 831 | |
8bf62ece AL |
832 | /* Check whether the converted CHS can fit. |
833 | Cylinder: 0-65535 | |
834 | Head: 0-15 | |
835 | Sector: 1-255*/ | |
c187c4b5 | 836 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 837 | goto out_of_range; |
c187c4b5 | 838 | |
8bf62ece AL |
839 | qc->nsect = n_block; |
840 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
841 | tf->lbal = sect; | |
842 | tf->lbam = cyl; | |
843 | tf->lbah = cyl >> 8; | |
844 | tf->device |= head; | |
1da177e4 LT |
845 | } |
846 | ||
8bf62ece | 847 | return 0; |
ae006510 DG |
848 | |
849 | invalid_fld: | |
850 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
851 | /* "Invalid field in cbd" */ | |
852 | return 1; | |
853 | ||
854 | out_of_range: | |
855 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
856 | /* "Logical Block Address out of range" */ | |
857 | return 1; | |
858 | ||
859 | nothing_to_do: | |
860 | qc->scsicmd->result = SAM_STAT_GOOD; | |
861 | return 1; | |
1da177e4 LT |
862 | } |
863 | ||
864 | static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) | |
865 | { | |
866 | struct scsi_cmnd *cmd = qc->scsicmd; | |
867 | ||
868 | if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) | |
869 | ata_to_sense_error(qc, drv_stat); | |
870 | else | |
871 | cmd->result = SAM_STAT_GOOD; | |
872 | ||
873 | qc->scsidone(cmd); | |
874 | ||
875 | return 0; | |
876 | } | |
877 | ||
878 | /** | |
879 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
880 | * @ap: ATA port to which the command is addressed | |
881 | * @dev: ATA device to which the command is addressed | |
882 | * @cmd: SCSI command to execute | |
883 | * @done: SCSI command completion function | |
884 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
885 | * | |
886 | * Our ->queuecommand() function has decided that the SCSI | |
887 | * command issued can be directly translated into an ATA | |
888 | * command, rather than handled internally. | |
889 | * | |
890 | * This function sets up an ata_queued_cmd structure for the | |
891 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
892 | * | |
ae006510 DG |
893 | * The xlat_func argument (actor) returns 0 if ready to execute |
894 | * ATA command, else 1 to finish translation. If 1 is returned | |
895 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
896 | * to be set reflecting an error condition or clean (early) | |
897 | * termination. | |
898 | * | |
1da177e4 LT |
899 | * LOCKING: |
900 | * spin_lock_irqsave(host_set lock) | |
901 | */ | |
902 | ||
903 | static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, | |
904 | struct scsi_cmnd *cmd, | |
905 | void (*done)(struct scsi_cmnd *), | |
906 | ata_xlat_func_t xlat_func) | |
907 | { | |
908 | struct ata_queued_cmd *qc; | |
909 | u8 *scsicmd = cmd->cmnd; | |
910 | ||
911 | VPRINTK("ENTER\n"); | |
912 | ||
913 | qc = ata_scsi_qc_new(ap, dev, cmd, done); | |
914 | if (!qc) | |
ae006510 | 915 | goto err_mem; |
1da177e4 LT |
916 | |
917 | /* data is present; dma-map it */ | |
be7db055 CH |
918 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
919 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 LT |
920 | if (unlikely(cmd->request_bufflen < 1)) { |
921 | printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", | |
922 | ap->id, dev->devno); | |
ae006510 | 923 | goto err_did; |
1da177e4 LT |
924 | } |
925 | ||
926 | if (cmd->use_sg) | |
927 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
928 | else | |
929 | ata_sg_init_one(qc, cmd->request_buffer, | |
930 | cmd->request_bufflen); | |
931 | ||
932 | qc->dma_dir = cmd->sc_data_direction; | |
933 | } | |
934 | ||
935 | qc->complete_fn = ata_scsi_qc_complete; | |
936 | ||
937 | if (xlat_func(qc, scsicmd)) | |
ae006510 | 938 | goto early_finish; |
1da177e4 LT |
939 | |
940 | /* select device, send command to hardware */ | |
941 | if (ata_qc_issue(qc)) | |
ae006510 | 942 | goto err_did; |
1da177e4 LT |
943 | |
944 | VPRINTK("EXIT\n"); | |
945 | return; | |
946 | ||
ae006510 DG |
947 | early_finish: |
948 | ata_qc_free(qc); | |
949 | done(cmd); | |
950 | DPRINTK("EXIT - early finish (good or error)\n"); | |
951 | return; | |
952 | ||
953 | err_did: | |
1da177e4 | 954 | ata_qc_free(qc); |
ae006510 DG |
955 | err_mem: |
956 | cmd->result = (DID_ERROR << 16); | |
957 | done(cmd); | |
958 | DPRINTK("EXIT - internal\n"); | |
959 | return; | |
1da177e4 LT |
960 | } |
961 | ||
962 | /** | |
963 | * ata_scsi_rbuf_get - Map response buffer. | |
964 | * @cmd: SCSI command containing buffer to be mapped. | |
965 | * @buf_out: Pointer to mapped area. | |
966 | * | |
967 | * Maps buffer contained within SCSI command @cmd. | |
968 | * | |
969 | * LOCKING: | |
970 | * spin_lock_irqsave(host_set lock) | |
971 | * | |
972 | * RETURNS: | |
973 | * Length of response buffer. | |
974 | */ | |
975 | ||
976 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
977 | { | |
978 | u8 *buf; | |
979 | unsigned int buflen; | |
980 | ||
981 | if (cmd->use_sg) { | |
982 | struct scatterlist *sg; | |
983 | ||
984 | sg = (struct scatterlist *) cmd->request_buffer; | |
985 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
986 | buflen = sg->length; | |
987 | } else { | |
988 | buf = cmd->request_buffer; | |
989 | buflen = cmd->request_bufflen; | |
990 | } | |
991 | ||
992 | *buf_out = buf; | |
993 | return buflen; | |
994 | } | |
995 | ||
996 | /** | |
997 | * ata_scsi_rbuf_put - Unmap response buffer. | |
998 | * @cmd: SCSI command containing buffer to be unmapped. | |
999 | * @buf: buffer to unmap | |
1000 | * | |
1001 | * Unmaps response buffer contained within @cmd. | |
1002 | * | |
1003 | * LOCKING: | |
1004 | * spin_lock_irqsave(host_set lock) | |
1005 | */ | |
1006 | ||
1007 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1008 | { | |
1009 | if (cmd->use_sg) { | |
1010 | struct scatterlist *sg; | |
1011 | ||
1012 | sg = (struct scatterlist *) cmd->request_buffer; | |
1013 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | /** | |
1018 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1019 | * @args: device IDENTIFY data / SCSI command of interest. | |
1020 | * @actor: Callback hook for desired SCSI command simulator | |
1021 | * | |
1022 | * Takes care of the hard work of simulating a SCSI command... | |
1023 | * Mapping the response buffer, calling the command's handler, | |
1024 | * and handling the handler's return value. This return value | |
1025 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1026 | * completed successfully (0), or not (in which case cmd->result |
1027 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1028 | * |
1029 | * LOCKING: | |
1030 | * spin_lock_irqsave(host_set lock) | |
1031 | */ | |
1032 | ||
1033 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1034 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1035 | u8 *rbuf, unsigned int buflen)) | |
1036 | { | |
1037 | u8 *rbuf; | |
1038 | unsigned int buflen, rc; | |
1039 | struct scsi_cmnd *cmd = args->cmd; | |
1040 | ||
1041 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1042 | memset(rbuf, 0, buflen); | |
1043 | rc = actor(args, rbuf, buflen); | |
1044 | ata_scsi_rbuf_put(cmd, rbuf); | |
1045 | ||
ae006510 | 1046 | if (rc == 0) |
1da177e4 | 1047 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1048 | args->done(cmd); |
1da177e4 LT |
1049 | } |
1050 | ||
1051 | /** | |
1052 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1053 | * @args: device IDENTIFY data / SCSI command of interest. | |
1054 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1055 | * @buflen: Response buffer length. | |
1056 | * | |
1057 | * Returns standard device identification data associated | |
1058 | * with non-EVPD INQUIRY command output. | |
1059 | * | |
1060 | * LOCKING: | |
1061 | * spin_lock_irqsave(host_set lock) | |
1062 | */ | |
1063 | ||
1064 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1065 | unsigned int buflen) | |
1066 | { | |
1067 | u8 hdr[] = { | |
1068 | TYPE_DISK, | |
1069 | 0, | |
1070 | 0x5, /* claim SPC-3 version compatibility */ | |
1071 | 2, | |
1072 | 95 - 4 | |
1073 | }; | |
1074 | ||
1075 | /* set scsi removeable (RMB) bit per ata bit */ | |
1076 | if (ata_id_removeable(args->id)) | |
1077 | hdr[1] |= (1 << 7); | |
1078 | ||
1079 | VPRINTK("ENTER\n"); | |
1080 | ||
1081 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1082 | ||
1083 | if (buflen > 35) { | |
1084 | memcpy(&rbuf[8], "ATA ", 8); | |
1085 | ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); | |
1086 | ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1087 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1088 | memcpy(&rbuf[32], "n/a ", 4); | |
1089 | } | |
1090 | ||
1091 | if (buflen > 63) { | |
1092 | const u8 versions[] = { | |
1093 | 0x60, /* SAM-3 (no version claimed) */ | |
1094 | ||
1095 | 0x03, | |
1096 | 0x20, /* SBC-2 (no version claimed) */ | |
1097 | ||
1098 | 0x02, | |
1099 | 0x60 /* SPC-3 (no version claimed) */ | |
1100 | }; | |
1101 | ||
1102 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1103 | } | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages | |
1110 | * @args: device IDENTIFY data / SCSI command of interest. | |
1111 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1112 | * @buflen: Response buffer length. | |
1113 | * | |
1114 | * Returns list of inquiry EVPD pages available. | |
1115 | * | |
1116 | * LOCKING: | |
1117 | * spin_lock_irqsave(host_set lock) | |
1118 | */ | |
1119 | ||
1120 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1121 | unsigned int buflen) | |
1122 | { | |
1123 | const u8 pages[] = { | |
1124 | 0x00, /* page 0x00, this page */ | |
1125 | 0x80, /* page 0x80, unit serial no page */ | |
1126 | 0x83 /* page 0x83, device ident page */ | |
1127 | }; | |
1128 | rbuf[3] = sizeof(pages); /* number of supported EVPD pages */ | |
1129 | ||
1130 | if (buflen > 6) | |
1131 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | /** | |
1137 | * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number | |
1138 | * @args: device IDENTIFY data / SCSI command of interest. | |
1139 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1140 | * @buflen: Response buffer length. | |
1141 | * | |
1142 | * Returns ATA device serial number. | |
1143 | * | |
1144 | * LOCKING: | |
1145 | * spin_lock_irqsave(host_set lock) | |
1146 | */ | |
1147 | ||
1148 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1149 | unsigned int buflen) | |
1150 | { | |
1151 | const u8 hdr[] = { | |
1152 | 0, | |
1153 | 0x80, /* this page code */ | |
1154 | 0, | |
1155 | ATA_SERNO_LEN, /* page len */ | |
1156 | }; | |
1157 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1158 | ||
1159 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
1160 | ata_dev_id_string(args->id, (unsigned char *) &rbuf[4], | |
1161 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1162 | ||
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | static const char *inq_83_str = "Linux ATA-SCSI simulator"; | |
1167 | ||
1168 | /** | |
1169 | * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity | |
1170 | * @args: device IDENTIFY data / SCSI command of interest. | |
1171 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1172 | * @buflen: Response buffer length. | |
1173 | * | |
1174 | * Returns device identification. Currently hardcoded to | |
1175 | * return "Linux ATA-SCSI simulator". | |
1176 | * | |
1177 | * LOCKING: | |
1178 | * spin_lock_irqsave(host_set lock) | |
1179 | */ | |
1180 | ||
1181 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1182 | unsigned int buflen) | |
1183 | { | |
1184 | rbuf[1] = 0x83; /* this page code */ | |
1185 | rbuf[3] = 4 + strlen(inq_83_str); /* page len */ | |
1186 | ||
1187 | /* our one and only identification descriptor (vendor-specific) */ | |
1188 | if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) { | |
1189 | rbuf[4 + 0] = 2; /* code set: ASCII */ | |
1190 | rbuf[4 + 3] = strlen(inq_83_str); | |
1191 | memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str)); | |
1192 | } | |
1193 | ||
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | /** | |
0cba632b | 1198 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1199 | * @args: device IDENTIFY data / SCSI command of interest. |
1200 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1201 | * @buflen: Response buffer length. | |
1202 | * | |
1203 | * No operation. Simply returns success to caller, to indicate | |
1204 | * that the caller should successfully complete this SCSI command. | |
1205 | * | |
1206 | * LOCKING: | |
1207 | * spin_lock_irqsave(host_set lock) | |
1208 | */ | |
1209 | ||
1210 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1211 | unsigned int buflen) | |
1212 | { | |
1213 | VPRINTK("ENTER\n"); | |
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1219 | * @ptr_io: (input/output) Location to store more output data | |
1220 | * @last: End of output data buffer | |
1221 | * @buf: Pointer to BLOB being added to output buffer | |
1222 | * @buflen: Length of BLOB | |
1223 | * | |
1224 | * Store MODE SENSE data on an output buffer. | |
1225 | * | |
1226 | * LOCKING: | |
1227 | * None. | |
1228 | */ | |
1229 | ||
1230 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1231 | const u8 *buf, unsigned int buflen) | |
1232 | { | |
1233 | u8 *ptr = *ptr_io; | |
1234 | ||
1235 | if ((ptr + buflen - 1) > last) | |
1236 | return; | |
1237 | ||
1238 | memcpy(ptr, buf, buflen); | |
1239 | ||
1240 | ptr += buflen; | |
1241 | ||
1242 | *ptr_io = ptr; | |
1243 | } | |
1244 | ||
1245 | /** | |
1246 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1247 | * @id: device IDENTIFY data | |
1248 | * @ptr_io: (input/output) Location to store more output data | |
1249 | * @last: End of output data buffer | |
1250 | * | |
1251 | * Generate a caching info page, which conditionally indicates | |
1252 | * write caching to the SCSI layer, depending on device | |
1253 | * capabilities. | |
1254 | * | |
1255 | * LOCKING: | |
1256 | * None. | |
1257 | */ | |
1258 | ||
1259 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1260 | const u8 *last) | |
1261 | { | |
1262 | u8 page[] = { | |
1263 | 0x8, /* page code */ | |
1264 | 0x12, /* page length */ | |
1265 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */ | |
1266 | 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */ | |
1267 | }; | |
1268 | ||
1269 | if (ata_id_wcache_enabled(id)) | |
1270 | page[2] |= (1 << 2); /* write cache enable */ | |
1271 | if (!ata_id_rahead_enabled(id)) | |
1272 | page[12] |= (1 << 5); /* disable read ahead */ | |
1273 | ||
1274 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1275 | return sizeof(page); | |
1276 | } | |
1277 | ||
1278 | /** | |
1279 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1280 | * @dev: Device associated with this MODE SENSE command | |
1281 | * @ptr_io: (input/output) Location to store more output data | |
1282 | * @last: End of output data buffer | |
1283 | * | |
1284 | * Generate a generic MODE SENSE control mode page. | |
1285 | * | |
1286 | * LOCKING: | |
1287 | * None. | |
1288 | */ | |
1289 | ||
1290 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1291 | { | |
1292 | const u8 page[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30}; | |
1293 | ||
1294 | /* byte 2: set the descriptor format sense data bit (bit 2) | |
1295 | * since we need to support returning this format for SAT | |
1296 | * commands and any SCSI commands against a 48b LBA device. | |
1297 | */ | |
1298 | ||
1299 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1300 | return sizeof(page); | |
1301 | } | |
1302 | ||
1303 | /** | |
1304 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1305 | * @dev: Device associated with this MODE SENSE command | |
1306 | * @ptr_io: (input/output) Location to store more output data | |
1307 | * @last: End of output data buffer | |
1308 | * | |
1309 | * Generate a generic MODE SENSE r/w error recovery page. | |
1310 | * | |
1311 | * LOCKING: | |
1312 | * None. | |
1313 | */ | |
1314 | ||
1315 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1316 | { | |
1317 | const u8 page[] = { | |
1318 | 0x1, /* page code */ | |
1319 | 0xa, /* page length */ | |
1320 | (1 << 7) | (1 << 6), /* note auto r/w reallocation */ | |
1321 | 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */ | |
1322 | }; | |
1323 | ||
1324 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1325 | return sizeof(page); | |
1326 | } | |
1327 | ||
1328 | /** | |
1329 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1330 | * @args: device IDENTIFY data / SCSI command of interest. | |
1331 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1332 | * @buflen: Response buffer length. | |
1333 | * | |
1334 | * Simulate MODE SENSE commands. | |
1335 | * | |
1336 | * LOCKING: | |
1337 | * spin_lock_irqsave(host_set lock) | |
1338 | */ | |
1339 | ||
1340 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1341 | unsigned int buflen) | |
1342 | { | |
1343 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
1344 | unsigned int page_control, six_byte, output_len; | |
1345 | ||
1346 | VPRINTK("ENTER\n"); | |
1347 | ||
1348 | six_byte = (scsicmd[0] == MODE_SENSE); | |
1349 | ||
1350 | /* we only support saved and current values (which we treat | |
1351 | * in the same manner) | |
1352 | */ | |
1353 | page_control = scsicmd[2] >> 6; | |
ae006510 DG |
1354 | switch (page_control) { |
1355 | case 0: /* current */ | |
1356 | break; /* supported */ | |
1357 | case 3: /* saved */ | |
1358 | goto saving_not_supp; | |
1359 | case 1: /* changeable */ | |
1360 | case 2: /* defaults */ | |
1361 | default: | |
1362 | goto invalid_fld; | |
1363 | } | |
1da177e4 LT |
1364 | |
1365 | if (six_byte) | |
1366 | output_len = 4; | |
1367 | else | |
1368 | output_len = 8; | |
1369 | ||
1370 | p = rbuf + output_len; | |
1371 | last = rbuf + buflen - 1; | |
1372 | ||
1373 | switch(scsicmd[2] & 0x3f) { | |
1374 | case 0x01: /* r/w error recovery */ | |
1375 | output_len += ata_msense_rw_recovery(&p, last); | |
1376 | break; | |
1377 | ||
1378 | case 0x08: /* caching */ | |
1379 | output_len += ata_msense_caching(args->id, &p, last); | |
1380 | break; | |
1381 | ||
1382 | case 0x0a: { /* control mode */ | |
1383 | output_len += ata_msense_ctl_mode(&p, last); | |
1384 | break; | |
1385 | } | |
1386 | ||
1387 | case 0x3f: /* all pages */ | |
1388 | output_len += ata_msense_rw_recovery(&p, last); | |
1389 | output_len += ata_msense_caching(args->id, &p, last); | |
1390 | output_len += ata_msense_ctl_mode(&p, last); | |
1391 | break; | |
1392 | ||
1393 | default: /* invalid page code */ | |
ae006510 | 1394 | goto invalid_fld; |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | if (six_byte) { | |
1398 | output_len--; | |
1399 | rbuf[0] = output_len; | |
1400 | } else { | |
1401 | output_len -= 2; | |
1402 | rbuf[0] = output_len >> 8; | |
1403 | rbuf[1] = output_len; | |
1404 | } | |
1405 | ||
1406 | return 0; | |
ae006510 DG |
1407 | |
1408 | invalid_fld: | |
1409 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1410 | /* "Invalid field in cbd" */ | |
1411 | return 1; | |
1412 | ||
1413 | saving_not_supp: | |
1414 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
1415 | /* "Saving parameters not supported" */ | |
1416 | return 1; | |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | /** | |
1420 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
1421 | * @args: device IDENTIFY data / SCSI command of interest. | |
1422 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1423 | * @buflen: Response buffer length. | |
1424 | * | |
1425 | * Simulate READ CAPACITY commands. | |
1426 | * | |
1427 | * LOCKING: | |
1428 | * spin_lock_irqsave(host_set lock) | |
1429 | */ | |
1430 | ||
1431 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
1432 | unsigned int buflen) | |
1433 | { | |
1434 | u64 n_sectors; | |
1435 | u32 tmp; | |
1436 | ||
1437 | VPRINTK("ENTER\n"); | |
1438 | ||
8bf62ece AL |
1439 | if (ata_id_has_lba(args->id)) { |
1440 | if (ata_id_has_lba48(args->id)) | |
1441 | n_sectors = ata_id_u64(args->id, 100); | |
1442 | else | |
1443 | n_sectors = ata_id_u32(args->id, 60); | |
1444 | } else { | |
1445 | /* CHS default translation */ | |
1446 | n_sectors = args->id[1] * args->id[3] * args->id[6]; | |
1447 | ||
1448 | if (ata_id_current_chs_valid(args->id)) | |
1449 | /* CHS current translation */ | |
1450 | n_sectors = ata_id_u32(args->id, 57); | |
1451 | } | |
1452 | ||
1da177e4 LT |
1453 | n_sectors--; /* ATA TotalUserSectors - 1 */ |
1454 | ||
1da177e4 | 1455 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
0c144d0d PP |
1456 | if( n_sectors >= 0xffffffffULL ) |
1457 | tmp = 0xffffffff ; /* Return max count on overflow */ | |
1458 | else | |
1459 | tmp = n_sectors ; | |
1460 | ||
1da177e4 LT |
1461 | /* sector count, 32-bit */ |
1462 | rbuf[0] = tmp >> (8 * 3); | |
1463 | rbuf[1] = tmp >> (8 * 2); | |
1464 | rbuf[2] = tmp >> (8 * 1); | |
1465 | rbuf[3] = tmp; | |
1466 | ||
1467 | /* sector size */ | |
1468 | tmp = ATA_SECT_SIZE; | |
1469 | rbuf[6] = tmp >> 8; | |
1470 | rbuf[7] = tmp; | |
1471 | ||
1472 | } else { | |
1473 | /* sector count, 64-bit */ | |
0c144d0d PP |
1474 | tmp = n_sectors >> (8 * 4); |
1475 | rbuf[2] = tmp >> (8 * 3); | |
1476 | rbuf[3] = tmp >> (8 * 2); | |
1477 | rbuf[4] = tmp >> (8 * 1); | |
1478 | rbuf[5] = tmp; | |
1479 | tmp = n_sectors; | |
1da177e4 LT |
1480 | rbuf[6] = tmp >> (8 * 3); |
1481 | rbuf[7] = tmp >> (8 * 2); | |
1482 | rbuf[8] = tmp >> (8 * 1); | |
1483 | rbuf[9] = tmp; | |
1484 | ||
1485 | /* sector size */ | |
1486 | tmp = ATA_SECT_SIZE; | |
1487 | rbuf[12] = tmp >> 8; | |
1488 | rbuf[13] = tmp; | |
1489 | } | |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | ||
1494 | /** | |
1495 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
1496 | * @args: device IDENTIFY data / SCSI command of interest. | |
1497 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1498 | * @buflen: Response buffer length. | |
1499 | * | |
1500 | * Simulate REPORT LUNS command. | |
1501 | * | |
1502 | * LOCKING: | |
1503 | * spin_lock_irqsave(host_set lock) | |
1504 | */ | |
1505 | ||
1506 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
1507 | unsigned int buflen) | |
1508 | { | |
1509 | VPRINTK("ENTER\n"); | |
1510 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
1511 | ||
1512 | return 0; | |
1513 | } | |
1514 | ||
845c5834 DG |
1515 | /** |
1516 | * ata_scsi_set_sense - Set SCSI sense data and status | |
1517 | * @cmd: SCSI request to be handled | |
1518 | * @sk: SCSI-defined sense key | |
1519 | * @asc: SCSI-defined additional sense code | |
1520 | * @ascq: SCSI-defined additional sense code qualifier | |
1521 | * | |
1522 | * Helper function that builds a valid fixed format, current | |
1523 | * response code and the given sense key (sk), additional sense | |
1524 | * code (asc) and additional sense code qualifier (ascq) with | |
1525 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
1526 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
1527 | * | |
1528 | * LOCKING: | |
1529 | * Not required | |
1530 | */ | |
1531 | ||
1532 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
1533 | { | |
1534 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
1535 | ||
1536 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
1537 | cmd->sense_buffer[2] = sk; | |
1538 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
1539 | cmd->sense_buffer[12] = asc; | |
1540 | cmd->sense_buffer[13] = ascq; | |
1541 | } | |
1542 | ||
1da177e4 LT |
1543 | /** |
1544 | * ata_scsi_badcmd - End a SCSI request with an error | |
1545 | * @cmd: SCSI request to be handled | |
1546 | * @done: SCSI command completion function | |
1547 | * @asc: SCSI-defined additional sense code | |
1548 | * @ascq: SCSI-defined additional sense code qualifier | |
1549 | * | |
1550 | * Helper function that completes a SCSI command with | |
1551 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
1552 | * and the specified additional sense codes. | |
1553 | * | |
1554 | * LOCKING: | |
1555 | * spin_lock_irqsave(host_set lock) | |
1556 | */ | |
1557 | ||
1558 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
1559 | { | |
1560 | DPRINTK("ENTER\n"); | |
ae006510 | 1561 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
1562 | |
1563 | done(cmd); | |
1564 | } | |
1565 | ||
a939c963 JG |
1566 | void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, |
1567 | struct scsi_cmnd *cmd) | |
1568 | { | |
1569 | DECLARE_COMPLETION(wait); | |
1570 | struct ata_queued_cmd *qc; | |
1571 | unsigned long flags; | |
1572 | int rc; | |
1573 | ||
1574 | DPRINTK("ATAPI request sense\n"); | |
1575 | ||
1576 | qc = ata_qc_new_init(ap, dev); | |
1577 | BUG_ON(qc == NULL); | |
1578 | ||
1579 | /* FIXME: is this needed? */ | |
1580 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
1581 | ||
1582 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); | |
1583 | qc->dma_dir = DMA_FROM_DEVICE; | |
1584 | ||
1585 | memset(&qc->cdb, 0, ap->cdb_len); | |
1586 | qc->cdb[0] = REQUEST_SENSE; | |
1587 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
1588 | ||
1589 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1590 | qc->tf.command = ATA_CMD_PACKET; | |
1591 | ||
1592 | qc->tf.protocol = ATA_PROT_ATAPI; | |
1593 | qc->tf.lbam = (8 * 1024) & 0xff; | |
1594 | qc->tf.lbah = (8 * 1024) >> 8; | |
1595 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; | |
1596 | ||
1597 | qc->waiting = &wait; | |
1598 | qc->complete_fn = ata_qc_complete_noop; | |
1599 | ||
1600 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
1601 | rc = ata_qc_issue(qc); | |
1602 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1603 | ||
1604 | if (rc) | |
1605 | ata_port_disable(ap); | |
1606 | else | |
1607 | wait_for_completion(&wait); | |
1608 | ||
1609 | DPRINTK("EXIT\n"); | |
1610 | } | |
1611 | ||
1da177e4 LT |
1612 | static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) |
1613 | { | |
1614 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1615 | ||
e12669e7 JG |
1616 | VPRINTK("ENTER, drv_stat == 0x%x\n", drv_stat); |
1617 | ||
a15dbeb4 JG |
1618 | if (unlikely(drv_stat & (ATA_BUSY | ATA_DRQ))) |
1619 | ata_to_sense_error(qc, drv_stat); | |
e12669e7 | 1620 | |
a15dbeb4 | 1621 | else if (unlikely(drv_stat & ATA_ERR)) { |
1da177e4 LT |
1622 | DPRINTK("request check condition\n"); |
1623 | ||
a15dbeb4 JG |
1624 | /* FIXME: command completion with check condition |
1625 | * but no sense causes the error handler to run, | |
1626 | * which then issues REQUEST SENSE, fills in the sense | |
1627 | * buffer, and completes the command (for the second | |
1628 | * time). We need to issue REQUEST SENSE some other | |
1629 | * way, to avoid completing the command twice. | |
1630 | */ | |
1da177e4 LT |
1631 | cmd->result = SAM_STAT_CHECK_CONDITION; |
1632 | ||
1633 | qc->scsidone(cmd); | |
1634 | ||
1635 | return 1; | |
e12669e7 JG |
1636 | } |
1637 | ||
1638 | else { | |
1da177e4 LT |
1639 | u8 *scsicmd = cmd->cmnd; |
1640 | ||
1641 | if (scsicmd[0] == INQUIRY) { | |
1642 | u8 *buf = NULL; | |
1643 | unsigned int buflen; | |
1644 | ||
1645 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
1646 | |
1647 | /* ATAPI devices typically report zero for their SCSI version, | |
1648 | * and sometimes deviate from the spec WRT response data | |
1649 | * format. If SCSI version is reported as zero like normal, | |
1650 | * then we make the following fixups: 1) Fake MMC-5 version, | |
1651 | * to indicate to the Linux scsi midlayer this is a modern | |
1652 | * device. 2) Ensure response data format / ATAPI information | |
1653 | * are always correct. | |
1654 | */ | |
1655 | /* FIXME: do we ever override EVPD pages and the like, with | |
1656 | * this code? | |
1657 | */ | |
1658 | if (buf[2] == 0) { | |
1659 | buf[2] = 0x5; | |
1660 | buf[3] = 0x32; | |
1661 | } | |
1662 | ||
1da177e4 LT |
1663 | ata_scsi_rbuf_put(cmd, buf); |
1664 | } | |
a15dbeb4 | 1665 | |
1da177e4 LT |
1666 | cmd->result = SAM_STAT_GOOD; |
1667 | } | |
1668 | ||
1669 | qc->scsidone(cmd); | |
1da177e4 LT |
1670 | return 0; |
1671 | } | |
1672 | /** | |
1673 | * atapi_xlat - Initialize PACKET taskfile | |
1674 | * @qc: command structure to be initialized | |
1675 | * @scsicmd: SCSI CDB associated with this PACKET command | |
1676 | * | |
1677 | * LOCKING: | |
1678 | * spin_lock_irqsave(host_set lock) | |
1679 | * | |
1680 | * RETURNS: | |
1681 | * Zero on success, non-zero on failure. | |
1682 | */ | |
1683 | ||
1684 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
1685 | { | |
1686 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1687 | struct ata_device *dev = qc->dev; | |
1688 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
be7db055 | 1689 | int nodata = (cmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
1690 | |
1691 | if (!using_pio) | |
1692 | /* Check whether ATAPI DMA is safe */ | |
1693 | if (ata_check_atapi_dma(qc)) | |
1694 | using_pio = 1; | |
1695 | ||
1696 | memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len); | |
1697 | ||
1698 | qc->complete_fn = atapi_qc_complete; | |
1699 | ||
1700 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
be7db055 | 1701 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
1702 | qc->tf.flags |= ATA_TFLAG_WRITE; |
1703 | DPRINTK("direction: write\n"); | |
1704 | } | |
1705 | ||
1706 | qc->tf.command = ATA_CMD_PACKET; | |
1707 | ||
1708 | /* no data, or PIO data xfer */ | |
1709 | if (using_pio || nodata) { | |
1710 | if (nodata) | |
1711 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
1712 | else | |
1713 | qc->tf.protocol = ATA_PROT_ATAPI; | |
1714 | qc->tf.lbam = (8 * 1024) & 0xff; | |
1715 | qc->tf.lbah = (8 * 1024) >> 8; | |
1716 | } | |
1717 | ||
1718 | /* DMA data xfer */ | |
1719 | else { | |
1720 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
1721 | qc->tf.feature |= ATAPI_PKT_DMA; | |
1722 | ||
1723 | #ifdef ATAPI_ENABLE_DMADIR | |
1724 | /* some SATA bridges need us to indicate data xfer direction */ | |
be7db055 | 1725 | if (cmd->sc_data_direction != DMA_TO_DEVICE) |
1da177e4 LT |
1726 | qc->tf.feature |= ATAPI_DMADIR; |
1727 | #endif | |
1728 | } | |
1729 | ||
1730 | qc->nbytes = cmd->bufflen; | |
1731 | ||
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | /** | |
1736 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
1737 | * @ap: ATA port to which the device is attached | |
1738 | * @scsidev: SCSI device from which we derive the ATA device | |
1739 | * | |
1740 | * Given various information provided in struct scsi_cmnd, | |
1741 | * map that onto an ATA bus, and using that mapping | |
1742 | * determine which ata_device is associated with the | |
1743 | * SCSI command to be sent. | |
1744 | * | |
1745 | * LOCKING: | |
1746 | * spin_lock_irqsave(host_set lock) | |
1747 | * | |
1748 | * RETURNS: | |
1749 | * Associated ATA device, or %NULL if not found. | |
1750 | */ | |
1751 | ||
1752 | static struct ata_device * | |
1753 | ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev) | |
1754 | { | |
1755 | struct ata_device *dev; | |
1756 | ||
1757 | /* skip commands not addressed to targets we simulate */ | |
1758 | if (likely(scsidev->id < ATA_MAX_DEVICES)) | |
1759 | dev = &ap->device[scsidev->id]; | |
1760 | else | |
1761 | return NULL; | |
1762 | ||
1763 | if (unlikely((scsidev->channel != 0) || | |
1764 | (scsidev->lun != 0))) | |
1765 | return NULL; | |
1766 | ||
1767 | if (unlikely(!ata_dev_present(dev))) | |
1768 | return NULL; | |
1769 | ||
6f106233 | 1770 | if (!atapi_enabled) { |
1623c81e JG |
1771 | if (unlikely(dev->class == ATA_DEV_ATAPI)) |
1772 | return NULL; | |
1773 | } | |
1da177e4 LT |
1774 | |
1775 | return dev; | |
1776 | } | |
1777 | ||
1778 | /** | |
1779 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
1780 | * @dev: ATA device | |
1781 | * @cmd: SCSI command opcode to consider | |
1782 | * | |
1783 | * Look up the SCSI command given, and determine whether the | |
1784 | * SCSI command is to be translated or simulated. | |
1785 | * | |
1786 | * RETURNS: | |
1787 | * Pointer to translation function if possible, %NULL if not. | |
1788 | */ | |
1789 | ||
1790 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
1791 | { | |
1792 | switch (cmd) { | |
1793 | case READ_6: | |
1794 | case READ_10: | |
1795 | case READ_16: | |
1796 | ||
1797 | case WRITE_6: | |
1798 | case WRITE_10: | |
1799 | case WRITE_16: | |
1800 | return ata_scsi_rw_xlat; | |
1801 | ||
1802 | case SYNCHRONIZE_CACHE: | |
1803 | if (ata_try_flush_cache(dev)) | |
1804 | return ata_scsi_flush_xlat; | |
1805 | break; | |
1806 | ||
1807 | case VERIFY: | |
1808 | case VERIFY_16: | |
1809 | return ata_scsi_verify_xlat; | |
972dcafb DG |
1810 | case START_STOP: |
1811 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
1812 | } |
1813 | ||
1814 | return NULL; | |
1815 | } | |
1816 | ||
1817 | /** | |
1818 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
1819 | * @ap: ATA port to which the command was being sent | |
1820 | * @cmd: SCSI command to dump | |
1821 | * | |
1822 | * Prints the contents of a SCSI command via printk(). | |
1823 | */ | |
1824 | ||
1825 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
1826 | struct scsi_cmnd *cmd) | |
1827 | { | |
1828 | #ifdef ATA_DEBUG | |
1829 | struct scsi_device *scsidev = cmd->device; | |
1830 | u8 *scsicmd = cmd->cmnd; | |
1831 | ||
1832 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
1833 | ap->id, | |
1834 | scsidev->channel, scsidev->id, scsidev->lun, | |
1835 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
1836 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
1837 | scsicmd[8]); | |
1838 | #endif | |
1839 | } | |
1840 | ||
1841 | /** | |
1842 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
1843 | * @cmd: SCSI command to be sent | |
1844 | * @done: Completion function, called when command is complete | |
1845 | * | |
1846 | * In some cases, this function translates SCSI commands into | |
1847 | * ATA taskfiles, and queues the taskfiles to be sent to | |
1848 | * hardware. In other cases, this function simulates a | |
1849 | * SCSI device by evaluating and responding to certain | |
1850 | * SCSI commands. This creates the overall effect of | |
1851 | * ATA and ATAPI devices appearing as SCSI devices. | |
1852 | * | |
1853 | * LOCKING: | |
1854 | * Releases scsi-layer-held lock, and obtains host_set lock. | |
1855 | * | |
1856 | * RETURNS: | |
1857 | * Zero. | |
1858 | */ | |
1859 | ||
1860 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
1861 | { | |
1862 | struct ata_port *ap; | |
1863 | struct ata_device *dev; | |
1864 | struct scsi_device *scsidev = cmd->device; | |
1865 | ||
1866 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
1867 | ||
1868 | ata_scsi_dump_cdb(ap, cmd); | |
1869 | ||
1870 | dev = ata_scsi_find_dev(ap, scsidev); | |
1871 | if (unlikely(!dev)) { | |
1872 | cmd->result = (DID_BAD_TARGET << 16); | |
1873 | done(cmd); | |
1874 | goto out_unlock; | |
1875 | } | |
1876 | ||
1877 | if (dev->class == ATA_DEV_ATA) { | |
1878 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
1879 | cmd->cmnd[0]); | |
1880 | ||
1881 | if (xlat_func) | |
1882 | ata_scsi_translate(ap, dev, cmd, done, xlat_func); | |
1883 | else | |
1884 | ata_scsi_simulate(dev->id, cmd, done); | |
1885 | } else | |
1886 | ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); | |
1887 | ||
1888 | out_unlock: | |
1889 | return 0; | |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
1894 | * @id: current IDENTIFY data for target device. | |
1895 | * @cmd: SCSI command being sent to device. | |
1896 | * @done: SCSI command completion function. | |
1897 | * | |
1898 | * Interprets and directly executes a select list of SCSI commands | |
1899 | * that can be handled internally. | |
1900 | * | |
1901 | * LOCKING: | |
1902 | * spin_lock_irqsave(host_set lock) | |
1903 | */ | |
1904 | ||
1905 | void ata_scsi_simulate(u16 *id, | |
1906 | struct scsi_cmnd *cmd, | |
1907 | void (*done)(struct scsi_cmnd *)) | |
1908 | { | |
1909 | struct ata_scsi_args args; | |
1910 | u8 *scsicmd = cmd->cmnd; | |
1911 | ||
1912 | args.id = id; | |
1913 | args.cmd = cmd; | |
1914 | args.done = done; | |
1915 | ||
1916 | switch(scsicmd[0]) { | |
1917 | /* no-op's, complete with success */ | |
1918 | case SYNCHRONIZE_CACHE: | |
1919 | case REZERO_UNIT: | |
1920 | case SEEK_6: | |
1921 | case SEEK_10: | |
1922 | case TEST_UNIT_READY: | |
1923 | case FORMAT_UNIT: /* FIXME: correct? */ | |
1924 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
1925 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
1926 | break; | |
1927 | ||
1928 | case INQUIRY: | |
1929 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 1930 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
1931 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
1932 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
1933 | else if (scsicmd[2] == 0x00) | |
1934 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1935 | else if (scsicmd[2] == 0x80) | |
1936 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1937 | else if (scsicmd[2] == 0x83) | |
1938 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
1939 | else | |
ae006510 | 1940 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
1941 | break; |
1942 | ||
1943 | case MODE_SENSE: | |
1944 | case MODE_SENSE_10: | |
1945 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
1946 | break; | |
1947 | ||
1948 | case MODE_SELECT: /* unconditionally return */ | |
1949 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 1950 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
1951 | break; |
1952 | ||
1953 | case READ_CAPACITY: | |
1954 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
1955 | break; | |
1956 | ||
1957 | case SERVICE_ACTION_IN: | |
1958 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
1959 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
1960 | else | |
ae006510 | 1961 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
1962 | break; |
1963 | ||
1964 | case REPORT_LUNS: | |
1965 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
1966 | break; | |
1967 | ||
1968 | /* mandantory commands we haven't implemented yet */ | |
1969 | case REQUEST_SENSE: | |
1970 | ||
1971 | /* all other commands */ | |
1972 | default: | |
ae006510 DG |
1973 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
1974 | /* "Invalid command operation code" */ | |
1975 | done(cmd); | |
1da177e4 LT |
1976 | break; |
1977 | } | |
1978 | } | |
1979 | ||
644dd0cc JG |
1980 | void ata_scsi_scan_host(struct ata_port *ap) |
1981 | { | |
3f19ee8c | 1982 | struct ata_device *dev; |
644dd0cc JG |
1983 | unsigned int i; |
1984 | ||
1985 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1986 | return; | |
1987 | ||
3f19ee8c JG |
1988 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
1989 | dev = &ap->device[i]; | |
1990 | ||
1991 | if (ata_dev_present(dev)) | |
1992 | scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); | |
1993 | } | |
644dd0cc JG |
1994 | } |
1995 |