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1da177e4 LT |
1 | /* |
2 | libata-scsi.c - helper library for ATA | |
3 | ||
4 | Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
5 | Copyright 2003-2004 Jeff Garzik | |
6 | ||
7 | The contents of this file are subject to the Open | |
8 | Software License version 1.1 that can be found at | |
9 | http://www.opensource.org/licenses/osl-1.1.txt and is included herein | |
10 | by reference. | |
11 | ||
12 | Alternatively, the contents of this file may be used under the terms | |
13 | of the GNU General Public License version 2 (the "GPL") as distributed | |
14 | in the kernel source COPYING file, in which case the provisions of | |
15 | the GPL are applicable instead of the above. If you wish to allow | |
16 | the use of your version of this file only under the terms of the | |
17 | GPL and not to allow others to use your version of this file under | |
18 | the OSL, indicate your decision by deleting the provisions above and | |
19 | replace them with the notice and other provisions required by the GPL. | |
20 | If you do not delete the provisions above, a recipient may use your | |
21 | version of this file under either the OSL or the GPL. | |
22 | ||
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/spinlock.h> | |
28 | #include <scsi/scsi.h> | |
29 | #include "scsi.h" | |
30 | #include <scsi/scsi_host.h> | |
31 | #include <linux/libata.h> | |
b095518e | 32 | #include <linux/hdreg.h> |
1da177e4 LT |
33 | #include <asm/uaccess.h> |
34 | ||
35 | #include "libata.h" | |
36 | ||
b095518e JG |
37 | #define SECTOR_SIZE 512 |
38 | ||
1da177e4 LT |
39 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd); |
40 | static struct ata_device * | |
41 | ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev); | |
42 | ||
43 | ||
44 | /** | |
45 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
46 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
47 | * @bdev: block device associated with @sdev | |
48 | * @capacity: capacity of SCSI device | |
49 | * @geom: location to which geometry will be output | |
50 | * | |
51 | * Generic bios head/sector/cylinder calculator | |
52 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
53 | * mapping. Some situations may arise where the disk is not | |
54 | * bootable if this is not used. | |
55 | * | |
56 | * LOCKING: | |
57 | * Defined by the SCSI layer. We don't really care. | |
58 | * | |
59 | * RETURNS: | |
60 | * Zero. | |
61 | */ | |
62 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
63 | sector_t capacity, int geom[]) | |
64 | { | |
65 | geom[0] = 255; | |
66 | geom[1] = 63; | |
67 | sector_div(capacity, 255*63); | |
68 | geom[2] = capacity; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
b095518e JG |
73 | /** |
74 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
75 | * @dev: Device to whom we are issuing command | |
76 | * @arg: User provided data for issuing command | |
77 | * | |
78 | * LOCKING: | |
79 | * Defined by the SCSI layer. We don't really care. | |
80 | * | |
81 | * RETURNS: | |
82 | * Zero on success, negative errno on error. | |
83 | */ | |
84 | ||
85 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) | |
86 | { | |
87 | int rc = 0; | |
88 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
89 | u8 args[4], *argbuf = NULL; | |
90 | int argsize = 0; | |
91 | struct scsi_request *sreq; | |
92 | ||
93 | if (NULL == (void *)arg) | |
94 | return -EINVAL; | |
95 | ||
96 | if (copy_from_user(args, arg, sizeof(args))) | |
97 | return -EFAULT; | |
98 | ||
99 | sreq = scsi_allocate_request(scsidev, GFP_KERNEL); | |
100 | if (!sreq) | |
101 | return -EINTR; | |
102 | ||
103 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
104 | ||
105 | if (args[3]) { | |
106 | argsize = SECTOR_SIZE * args[3]; | |
107 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
108 | if (argbuf == NULL) | |
109 | return -ENOMEM; | |
110 | ||
111 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
112 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
113 | block count in sector count field */ | |
114 | sreq->sr_data_direction = DMA_FROM_DEVICE; | |
115 | } else { | |
116 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
117 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
118 | sreq->sr_data_direction = DMA_NONE; | |
119 | } | |
120 | ||
121 | scsi_cmd[0] = ATA_16; | |
122 | ||
123 | scsi_cmd[4] = args[2]; | |
124 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
125 | scsi_cmd[6] = args[3]; | |
126 | scsi_cmd[8] = args[1]; | |
127 | scsi_cmd[10] = 0x4f; | |
128 | scsi_cmd[12] = 0xc2; | |
129 | } else { | |
130 | scsi_cmd[6] = args[1]; | |
131 | } | |
132 | scsi_cmd[14] = args[0]; | |
133 | ||
134 | /* Good values for timeout and retries? Values below | |
135 | from scsi_ioctl_send_command() for default case... */ | |
136 | scsi_wait_req(sreq, scsi_cmd, argbuf, argsize, (10*HZ), 5); | |
137 | ||
138 | if (sreq->sr_result) { | |
139 | rc = -EIO; | |
140 | goto error; | |
141 | } | |
142 | ||
143 | /* Need code to retrieve data from check condition? */ | |
144 | ||
145 | if ((argbuf) | |
146 | && copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize)) | |
147 | rc = -EFAULT; | |
148 | error: | |
149 | scsi_release_request(sreq); | |
150 | ||
151 | if (argbuf) | |
152 | kfree(argbuf); | |
153 | ||
154 | return rc; | |
155 | } | |
156 | ||
157 | /** | |
158 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
159 | * @dev: Device to whom we are issuing command | |
160 | * @arg: User provided data for issuing command | |
161 | * | |
162 | * LOCKING: | |
163 | * Defined by the SCSI layer. We don't really care. | |
164 | * | |
165 | * RETURNS: | |
166 | * Zero on success, negative errno on error. | |
167 | */ | |
168 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
169 | { | |
170 | int rc = 0; | |
171 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
172 | u8 args[7]; | |
173 | struct scsi_request *sreq; | |
174 | ||
175 | if (NULL == (void *)arg) | |
176 | return -EINVAL; | |
177 | ||
178 | if (copy_from_user(args, arg, sizeof(args))) | |
179 | return -EFAULT; | |
180 | ||
181 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
182 | scsi_cmd[0] = ATA_16; | |
183 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
184 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
185 | scsi_cmd[4] = args[1]; | |
186 | scsi_cmd[6] = args[2]; | |
187 | scsi_cmd[8] = args[3]; | |
188 | scsi_cmd[10] = args[4]; | |
189 | scsi_cmd[12] = args[5]; | |
190 | scsi_cmd[14] = args[0]; | |
191 | ||
192 | sreq = scsi_allocate_request(scsidev, GFP_KERNEL); | |
193 | if (!sreq) { | |
194 | rc = -EINTR; | |
195 | goto error; | |
196 | } | |
197 | ||
198 | sreq->sr_data_direction = DMA_NONE; | |
199 | /* Good values for timeout and retries? Values below | |
200 | from scsi_ioctl_send_command() for default case... */ | |
201 | scsi_wait_req(sreq, scsi_cmd, NULL, 0, (10*HZ), 5); | |
202 | ||
203 | if (sreq->sr_result) { | |
204 | rc = -EIO; | |
205 | goto error; | |
206 | } | |
207 | ||
208 | /* Need code to retrieve data from check condition? */ | |
209 | ||
210 | error: | |
211 | scsi_release_request(sreq); | |
212 | return rc; | |
213 | } | |
214 | ||
1da177e4 LT |
215 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
216 | { | |
217 | struct ata_port *ap; | |
218 | struct ata_device *dev; | |
219 | int val = -EINVAL, rc = -EINVAL; | |
220 | ||
221 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
222 | if (!ap) | |
223 | goto out; | |
224 | ||
225 | dev = ata_scsi_find_dev(ap, scsidev); | |
226 | if (!dev) { | |
227 | rc = -ENODEV; | |
228 | goto out; | |
229 | } | |
230 | ||
231 | switch (cmd) { | |
232 | case ATA_IOC_GET_IO32: | |
233 | val = 0; | |
234 | if (copy_to_user(arg, &val, 1)) | |
235 | return -EFAULT; | |
236 | return 0; | |
237 | ||
238 | case ATA_IOC_SET_IO32: | |
239 | val = (unsigned long) arg; | |
240 | if (val != 0) | |
241 | return -EINVAL; | |
242 | return 0; | |
243 | ||
b095518e JG |
244 | case HDIO_DRIVE_CMD: |
245 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
246 | return -EACCES; | |
247 | return ata_cmd_ioctl(scsidev, arg); | |
248 | ||
249 | case HDIO_DRIVE_TASK: | |
250 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
251 | return -EACCES; | |
252 | return ata_task_ioctl(scsidev, arg); | |
253 | ||
1da177e4 LT |
254 | default: |
255 | rc = -ENOTTY; | |
256 | break; | |
257 | } | |
258 | ||
259 | out: | |
260 | return rc; | |
261 | } | |
262 | ||
263 | /** | |
264 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
265 | * @ap: ATA port to which the new command is attached | |
266 | * @dev: ATA device to which the new command is attached | |
267 | * @cmd: SCSI command that originated this ATA command | |
268 | * @done: SCSI command completion function | |
269 | * | |
270 | * Obtain a reference to an unused ata_queued_cmd structure, | |
271 | * which is the basic libata structure representing a single | |
272 | * ATA command sent to the hardware. | |
273 | * | |
274 | * If a command was available, fill in the SCSI-specific | |
275 | * portions of the structure with information on the | |
276 | * current command. | |
277 | * | |
278 | * LOCKING: | |
279 | * spin_lock_irqsave(host_set lock) | |
280 | * | |
281 | * RETURNS: | |
282 | * Command allocated, or %NULL if none available. | |
283 | */ | |
284 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap, | |
285 | struct ata_device *dev, | |
286 | struct scsi_cmnd *cmd, | |
287 | void (*done)(struct scsi_cmnd *)) | |
288 | { | |
289 | struct ata_queued_cmd *qc; | |
290 | ||
291 | qc = ata_qc_new_init(ap, dev); | |
292 | if (qc) { | |
293 | qc->scsicmd = cmd; | |
294 | qc->scsidone = done; | |
295 | ||
296 | if (cmd->use_sg) { | |
297 | qc->sg = (struct scatterlist *) cmd->request_buffer; | |
298 | qc->n_elem = cmd->use_sg; | |
299 | } else { | |
300 | qc->sg = &qc->sgent; | |
301 | qc->n_elem = 1; | |
302 | } | |
303 | } else { | |
304 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
305 | done(cmd); | |
306 | } | |
307 | ||
308 | return qc; | |
309 | } | |
310 | ||
b095518e JG |
311 | /** |
312 | * ata_dump_status - user friendly display of error info | |
313 | * @id: id of the port in question | |
314 | * @tf: ptr to filled out taskfile | |
315 | * | |
316 | * Decode and dump the ATA error/status registers for the user so | |
317 | * that they have some idea what really happened at the non | |
318 | * make-believe layer. | |
319 | * | |
320 | * LOCKING: | |
321 | * inherited from caller | |
322 | */ | |
323 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
324 | { | |
325 | u8 stat = tf->command, err = tf->feature; | |
326 | ||
327 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
328 | if (stat & ATA_BUSY) { | |
329 | printk("Busy }\n"); /* Data is not valid in this case */ | |
330 | } else { | |
331 | if (stat & 0x40) printk("DriveReady "); | |
332 | if (stat & 0x20) printk("DeviceFault "); | |
333 | if (stat & 0x10) printk("SeekComplete "); | |
334 | if (stat & 0x08) printk("DataRequest "); | |
335 | if (stat & 0x04) printk("CorrectedError "); | |
336 | if (stat & 0x02) printk("Index "); | |
337 | if (stat & 0x01) printk("Error "); | |
338 | printk("}\n"); | |
339 | ||
340 | if (err) { | |
341 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
342 | if (err & 0x04) printk("DriveStatusError "); | |
343 | if (err & 0x80) { | |
344 | if (err & 0x04) printk("BadCRC "); | |
345 | else printk("Sector "); | |
346 | } | |
347 | if (err & 0x40) printk("UncorrectableError "); | |
348 | if (err & 0x10) printk("SectorIdNotFound "); | |
349 | if (err & 0x02) printk("TrackZeroNotFound "); | |
350 | if (err & 0x01) printk("AddrMarkNotFound "); | |
351 | printk("}\n"); | |
352 | } | |
353 | } | |
354 | } | |
355 | ||
1da177e4 LT |
356 | /** |
357 | * ata_to_sense_error - convert ATA error to SCSI error | |
1da177e4 | 358 | * @drv_stat: value contained in ATA status register |
b095518e JG |
359 | * @drv_err: value contained in ATA error register |
360 | * @sk: the sense key we'll fill out | |
361 | * @asc: the additional sense code we'll fill out | |
362 | * @ascq: the additional sense code qualifier we'll fill out | |
1da177e4 | 363 | * |
b095518e JG |
364 | * Converts an ATA error into a SCSI error. Fill out pointers to |
365 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
366 | * format sense blocks. | |
1da177e4 LT |
367 | * |
368 | * LOCKING: | |
369 | * spin_lock_irqsave(host_set lock) | |
370 | */ | |
b095518e JG |
371 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
372 | u8 *ascq) | |
1da177e4 | 373 | { |
b095518e | 374 | int i; |
1da177e4 LT |
375 | /* Based on the 3ware driver translation table */ |
376 | static unsigned char sense_table[][4] = { | |
377 | /* BBD|ECC|ID|MAR */ | |
378 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
379 | /* BBD|ECC|ID */ | |
380 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
381 | /* ECC|MC|MARK */ | |
382 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
383 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
384 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
385 | /* MC|ID|ABRT|TRK0|MARK */ | |
386 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
387 | /* MCR|MARK */ | |
388 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
389 | /* Bad address mark */ | |
390 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
391 | /* TRK0 */ | |
392 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
393 | /* Abort & !ICRC */ | |
394 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
395 | /* Media change request */ | |
396 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
397 | /* SRV */ | |
398 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
399 | /* Media change */ | |
400 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
401 | /* ECC */ | |
402 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
403 | /* BBD - block marked bad */ | |
404 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
405 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
406 | }; | |
407 | static unsigned char stat_table[][4] = { | |
408 | /* Must be first because BUSY means no other bits valid */ | |
409 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
410 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
411 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
412 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
413 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
414 | }; | |
1da177e4 LT |
415 | |
416 | /* | |
417 | * Is this an error we can process/parse | |
418 | */ | |
b095518e JG |
419 | if (drv_stat & ATA_BUSY) { |
420 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 421 | } |
b095518e JG |
422 | |
423 | if (drv_err) { | |
424 | /* Look for drv_err */ | |
425 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
426 | /* Look for best matches first */ | |
427 | if ((sense_table[i][0] & drv_err) == | |
428 | sense_table[i][0]) { | |
429 | *sk = sense_table[i][1]; | |
430 | *asc = sense_table[i][2]; | |
431 | *ascq = sense_table[i][3]; | |
432 | goto translate_done; | |
433 | } | |
434 | } | |
435 | /* No immediate match */ | |
436 | printk(KERN_WARNING "ata%u: no sense translation for " | |
437 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 438 | } |
b095518e JG |
439 | |
440 | /* Fall back to interpreting status bits */ | |
441 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
442 | if (stat_table[i][0] & drv_stat) { | |
443 | *sk = stat_table[i][1]; | |
444 | *asc = stat_table[i][2]; | |
445 | *ascq = stat_table[i][3]; | |
446 | goto translate_done; | |
1da177e4 | 447 | } |
b095518e JG |
448 | } |
449 | /* No error? Undecoded? */ | |
450 | printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n", | |
451 | id, drv_stat); | |
452 | ||
453 | /* For our last chance pick, use medium read error because | |
454 | * it's much more common than an ATA drive telling you a write | |
455 | * has failed. | |
456 | */ | |
457 | *sk = MEDIUM_ERROR; | |
458 | *asc = 0x11; /* "unrecovered read error" */ | |
459 | *ascq = 0x04; /* "auto-reallocation failed" */ | |
460 | ||
461 | translate_done: | |
462 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to " | |
463 | "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err, | |
464 | *sk, *asc, *ascq); | |
465 | return; | |
466 | } | |
467 | ||
468 | /* | |
469 | * ata_gen_ata_desc_sense - Generate check condition sense block. | |
470 | * @qc: Command that completed. | |
471 | * | |
472 | * This function is specific to the ATA descriptor format sense | |
473 | * block specified for the ATA pass through commands. Regardless | |
474 | * of whether the command errored or not, return a sense | |
475 | * block. Copy all controller registers into the sense | |
476 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
477 | * | |
478 | * LOCKING: | |
479 | * spin_lock_irqsave(host_set lock) | |
480 | */ | |
481 | void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) | |
482 | { | |
483 | struct scsi_cmnd *cmd = qc->scsicmd; | |
484 | struct ata_taskfile *tf = &qc->tf; | |
485 | unsigned char *sb = cmd->sense_buffer; | |
486 | unsigned char *desc = sb + 8; | |
487 | ||
488 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
489 | ||
490 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
491 | ||
492 | /* | |
493 | * Read the controller registers. | |
494 | */ | |
495 | assert(NULL != qc->ap->ops->tf_read); | |
496 | qc->ap->ops->tf_read(qc->ap, tf); | |
1da177e4 | 497 | |
b095518e JG |
498 | /* |
499 | * Use ata_to_sense_error() to map status register bits | |
500 | * onto sense key, asc & ascq. | |
501 | */ | |
502 | if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) { | |
503 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, | |
504 | &sb[1], &sb[2], &sb[3]); | |
505 | sb[1] &= 0x0f; | |
1da177e4 LT |
506 | } |
507 | ||
b095518e JG |
508 | /* |
509 | * Sense data is current and format is descriptor. | |
510 | */ | |
511 | sb[0] = 0x72; | |
1da177e4 | 512 | |
b095518e JG |
513 | desc[0] = 0x09; |
514 | ||
515 | /* | |
516 | * Set length of additional sense data. | |
517 | * Since we only populate descriptor 0, the total | |
518 | * length is the same (fixed) length as descriptor 0. | |
519 | */ | |
520 | desc[1] = sb[7] = 14; | |
521 | ||
522 | /* | |
523 | * Copy registers into sense buffer. | |
524 | */ | |
525 | desc[2] = 0x00; | |
526 | desc[3] = tf->feature; /* == error reg */ | |
527 | desc[5] = tf->nsect; | |
528 | desc[7] = tf->lbal; | |
529 | desc[9] = tf->lbam; | |
530 | desc[11] = tf->lbah; | |
531 | desc[12] = tf->device; | |
532 | desc[13] = tf->command; /* == status reg */ | |
533 | ||
534 | /* | |
535 | * Fill in Extend bit, and the high order bytes | |
536 | * if applicable. | |
537 | */ | |
538 | if (tf->flags & ATA_TFLAG_LBA48) { | |
539 | desc[2] |= 0x01; | |
540 | desc[4] = tf->hob_nsect; | |
541 | desc[6] = tf->hob_lbal; | |
542 | desc[8] = tf->hob_lbam; | |
543 | desc[10] = tf->hob_lbah; | |
1da177e4 | 544 | } |
b095518e | 545 | } |
1da177e4 | 546 | |
b095518e JG |
547 | /** |
548 | * ata_gen_fixed_sense - generate a SCSI fixed sense block | |
549 | * @qc: Command that we are erroring out | |
550 | * | |
551 | * Leverage ata_to_sense_error() to give us the codes. Fit our | |
552 | * LBA in here if there's room. | |
553 | * | |
554 | * LOCKING: | |
555 | * inherited from caller | |
556 | */ | |
557 | void ata_gen_fixed_sense(struct ata_queued_cmd *qc) | |
558 | { | |
559 | struct scsi_cmnd *cmd = qc->scsicmd; | |
560 | struct ata_taskfile *tf = &qc->tf; | |
561 | unsigned char *sb = cmd->sense_buffer; | |
562 | ||
563 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
564 | ||
565 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
566 | ||
567 | /* | |
568 | * Read the controller registers. | |
569 | */ | |
570 | assert(NULL != qc->ap->ops->tf_read); | |
571 | qc->ap->ops->tf_read(qc->ap, tf); | |
572 | ||
573 | /* | |
574 | * Use ata_to_sense_error() to map status register bits | |
575 | * onto sense key, asc & ascq. | |
576 | */ | |
577 | if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) { | |
578 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, | |
579 | &sb[2], &sb[12], &sb[13]); | |
580 | sb[2] &= 0x0f; | |
1da177e4 | 581 | } |
1da177e4 LT |
582 | |
583 | sb[0] = 0x70; | |
b095518e JG |
584 | sb[7] = 0x0a; |
585 | if (tf->flags & ATA_TFLAG_LBA && !(tf->flags & ATA_TFLAG_LBA48)) { | |
586 | /* A small (28b) LBA will fit in the 32b info field */ | |
587 | sb[0] |= 0x80; /* set valid bit */ | |
588 | sb[3] = tf->device & 0x0f; | |
589 | sb[4] = tf->lbah; | |
590 | sb[5] = tf->lbam; | |
591 | sb[6] = tf->lbal; | |
1da177e4 LT |
592 | } |
593 | } | |
594 | ||
595 | /** | |
596 | * ata_scsi_slave_config - Set SCSI device attributes | |
597 | * @sdev: SCSI device to examine | |
598 | * | |
599 | * This is called before we actually start reading | |
600 | * and writing to the device, to configure certain | |
601 | * SCSI mid-layer behaviors. | |
602 | * | |
603 | * LOCKING: | |
604 | * Defined by SCSI layer. We don't really care. | |
605 | */ | |
606 | ||
607 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
608 | { | |
609 | sdev->use_10_for_rw = 1; | |
610 | sdev->use_10_for_ms = 1; | |
611 | ||
612 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
613 | ||
614 | if (sdev->id < ATA_MAX_DEVICES) { | |
615 | struct ata_port *ap; | |
616 | struct ata_device *dev; | |
617 | ||
618 | ap = (struct ata_port *) &sdev->host->hostdata[0]; | |
619 | dev = &ap->device[sdev->id]; | |
620 | ||
621 | /* TODO: 1024 is an arbitrary number, not the | |
622 | * hardware maximum. This should be increased to | |
623 | * 65534 when Jens Axboe's patch for dynamically | |
624 | * determining max_sectors is merged. | |
625 | */ | |
626 | if ((dev->flags & ATA_DFLAG_LBA48) && | |
627 | ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) { | |
f85bdb9c JL |
628 | /* |
629 | * do not overwrite sdev->host->max_sectors, since | |
630 | * other drives on this host may not support LBA48 | |
631 | */ | |
1da177e4 LT |
632 | blk_queue_max_sectors(sdev->request_queue, 2048); |
633 | } | |
634 | } | |
635 | ||
636 | return 0; /* scsi layer doesn't check return value, sigh */ | |
637 | } | |
638 | ||
639 | /** | |
640 | * ata_scsi_error - SCSI layer error handler callback | |
641 | * @host: SCSI host on which error occurred | |
642 | * | |
643 | * Handles SCSI-layer-thrown error events. | |
644 | * | |
645 | * LOCKING: | |
646 | * Inherited from SCSI layer (none, can sleep) | |
647 | * | |
648 | * RETURNS: | |
649 | * Zero. | |
650 | */ | |
651 | ||
652 | int ata_scsi_error(struct Scsi_Host *host) | |
653 | { | |
654 | struct ata_port *ap; | |
655 | ||
656 | DPRINTK("ENTER\n"); | |
657 | ||
658 | ap = (struct ata_port *) &host->hostdata[0]; | |
659 | ap->ops->eng_timeout(ap); | |
660 | ||
661 | /* TODO: this is per-command; when queueing is supported | |
662 | * this code will either change or move to a more | |
663 | * appropriate place | |
664 | */ | |
665 | host->host_failed--; | |
666 | ||
667 | DPRINTK("EXIT\n"); | |
668 | return 0; | |
669 | } | |
670 | ||
671 | /** | |
672 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
673 | * @qc: Storage for translated ATA taskfile | |
674 | * @scsicmd: SCSI command to translate (ignored) | |
675 | * | |
676 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
677 | * FLUSH CACHE EXT. | |
678 | * | |
679 | * LOCKING: | |
680 | * spin_lock_irqsave(host_set lock) | |
681 | * | |
682 | * RETURNS: | |
683 | * Zero on success, non-zero on error. | |
684 | */ | |
685 | ||
686 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
687 | { | |
688 | struct ata_taskfile *tf = &qc->tf; | |
689 | ||
690 | tf->flags |= ATA_TFLAG_DEVICE; | |
691 | tf->protocol = ATA_PROT_NODATA; | |
692 | ||
693 | if ((tf->flags & ATA_TFLAG_LBA48) && | |
694 | (ata_id_has_flush_ext(qc->dev->id))) | |
695 | tf->command = ATA_CMD_FLUSH_EXT; | |
696 | else | |
697 | tf->command = ATA_CMD_FLUSH; | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | /** | |
703 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
704 | * @qc: Storage for translated ATA taskfile | |
705 | * @scsicmd: SCSI command to translate | |
706 | * | |
707 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
708 | * | |
709 | * LOCKING: | |
710 | * spin_lock_irqsave(host_set lock) | |
711 | * | |
712 | * RETURNS: | |
713 | * Zero on success, non-zero on error. | |
714 | */ | |
715 | ||
716 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
717 | { | |
718 | struct ata_taskfile *tf = &qc->tf; | |
719 | unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; | |
720 | u64 dev_sectors = qc->dev->n_sectors; | |
721 | u64 sect = 0; | |
722 | u32 n_sect = 0; | |
723 | ||
724 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
725 | tf->protocol = ATA_PROT_NODATA; | |
726 | tf->device |= ATA_LBA; | |
727 | ||
728 | if (scsicmd[0] == VERIFY) { | |
729 | sect |= ((u64)scsicmd[2]) << 24; | |
730 | sect |= ((u64)scsicmd[3]) << 16; | |
731 | sect |= ((u64)scsicmd[4]) << 8; | |
732 | sect |= ((u64)scsicmd[5]); | |
733 | ||
734 | n_sect |= ((u32)scsicmd[7]) << 8; | |
735 | n_sect |= ((u32)scsicmd[8]); | |
736 | } | |
737 | ||
738 | else if (scsicmd[0] == VERIFY_16) { | |
739 | sect |= ((u64)scsicmd[2]) << 56; | |
740 | sect |= ((u64)scsicmd[3]) << 48; | |
741 | sect |= ((u64)scsicmd[4]) << 40; | |
742 | sect |= ((u64)scsicmd[5]) << 32; | |
743 | sect |= ((u64)scsicmd[6]) << 24; | |
744 | sect |= ((u64)scsicmd[7]) << 16; | |
745 | sect |= ((u64)scsicmd[8]) << 8; | |
746 | sect |= ((u64)scsicmd[9]); | |
747 | ||
748 | n_sect |= ((u32)scsicmd[10]) << 24; | |
749 | n_sect |= ((u32)scsicmd[11]) << 16; | |
750 | n_sect |= ((u32)scsicmd[12]) << 8; | |
751 | n_sect |= ((u32)scsicmd[13]); | |
752 | } | |
753 | ||
754 | else | |
755 | return 1; | |
756 | ||
757 | if (!n_sect) | |
758 | return 1; | |
759 | if (sect >= dev_sectors) | |
760 | return 1; | |
761 | if ((sect + n_sect) > dev_sectors) | |
762 | return 1; | |
763 | if (lba48) { | |
764 | if (n_sect > (64 * 1024)) | |
765 | return 1; | |
766 | } else { | |
767 | if (n_sect > 256) | |
768 | return 1; | |
769 | } | |
770 | ||
771 | if (lba48) { | |
772 | tf->command = ATA_CMD_VERIFY_EXT; | |
773 | ||
774 | tf->hob_nsect = (n_sect >> 8) & 0xff; | |
775 | ||
776 | tf->hob_lbah = (sect >> 40) & 0xff; | |
777 | tf->hob_lbam = (sect >> 32) & 0xff; | |
778 | tf->hob_lbal = (sect >> 24) & 0xff; | |
779 | } else { | |
780 | tf->command = ATA_CMD_VERIFY; | |
781 | ||
782 | tf->device |= (sect >> 24) & 0xf; | |
783 | } | |
784 | ||
785 | tf->nsect = n_sect & 0xff; | |
786 | ||
787 | tf->lbah = (sect >> 16) & 0xff; | |
788 | tf->lbam = (sect >> 8) & 0xff; | |
789 | tf->lbal = sect & 0xff; | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | /** | |
795 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
796 | * @qc: Storage for translated ATA taskfile | |
797 | * @scsicmd: SCSI command to translate | |
798 | * | |
799 | * Converts any of six SCSI read/write commands into the | |
800 | * ATA counterpart, including starting sector (LBA), | |
801 | * sector count, and taking into account the device's LBA48 | |
802 | * support. | |
803 | * | |
804 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
805 | * %WRITE_16 are currently supported. | |
806 | * | |
807 | * LOCKING: | |
808 | * spin_lock_irqsave(host_set lock) | |
809 | * | |
810 | * RETURNS: | |
811 | * Zero on success, non-zero on error. | |
812 | */ | |
813 | ||
814 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
815 | { | |
816 | struct ata_taskfile *tf = &qc->tf; | |
817 | unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; | |
818 | ||
819 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
820 | tf->protocol = qc->dev->xfer_protocol; | |
821 | tf->device |= ATA_LBA; | |
822 | ||
823 | if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 || | |
824 | scsicmd[0] == READ_16) { | |
825 | tf->command = qc->dev->read_cmd; | |
826 | } else { | |
827 | tf->command = qc->dev->write_cmd; | |
828 | tf->flags |= ATA_TFLAG_WRITE; | |
829 | } | |
830 | ||
831 | if (scsicmd[0] == READ_10 || scsicmd[0] == WRITE_10) { | |
832 | if (lba48) { | |
833 | tf->hob_nsect = scsicmd[7]; | |
834 | tf->hob_lbal = scsicmd[2]; | |
835 | ||
836 | qc->nsect = ((unsigned int)scsicmd[7] << 8) | | |
837 | scsicmd[8]; | |
838 | } else { | |
839 | /* if we don't support LBA48 addressing, the request | |
840 | * -may- be too large. */ | |
841 | if ((scsicmd[2] & 0xf0) || scsicmd[7]) | |
842 | return 1; | |
843 | ||
844 | /* stores LBA27:24 in lower 4 bits of device reg */ | |
845 | tf->device |= scsicmd[2]; | |
846 | ||
847 | qc->nsect = scsicmd[8]; | |
848 | } | |
849 | ||
850 | tf->nsect = scsicmd[8]; | |
851 | tf->lbal = scsicmd[5]; | |
852 | tf->lbam = scsicmd[4]; | |
853 | tf->lbah = scsicmd[3]; | |
854 | ||
855 | VPRINTK("ten-byte command\n"); | |
856 | return 0; | |
857 | } | |
858 | ||
859 | if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) { | |
860 | qc->nsect = tf->nsect = scsicmd[4]; | |
861 | tf->lbal = scsicmd[3]; | |
862 | tf->lbam = scsicmd[2]; | |
863 | tf->lbah = scsicmd[1] & 0x1f; /* mask out reserved bits */ | |
864 | ||
865 | VPRINTK("six-byte command\n"); | |
866 | return 0; | |
867 | } | |
868 | ||
869 | if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) { | |
870 | /* rule out impossible LBAs and sector counts */ | |
871 | if (scsicmd[2] || scsicmd[3] || scsicmd[10] || scsicmd[11]) | |
872 | return 1; | |
873 | ||
874 | if (lba48) { | |
875 | tf->hob_nsect = scsicmd[12]; | |
876 | tf->hob_lbal = scsicmd[6]; | |
877 | tf->hob_lbam = scsicmd[5]; | |
878 | tf->hob_lbah = scsicmd[4]; | |
879 | ||
880 | qc->nsect = ((unsigned int)scsicmd[12] << 8) | | |
881 | scsicmd[13]; | |
882 | } else { | |
883 | /* once again, filter out impossible non-zero values */ | |
884 | if (scsicmd[4] || scsicmd[5] || scsicmd[12] || | |
885 | (scsicmd[6] & 0xf0)) | |
886 | return 1; | |
887 | ||
888 | /* stores LBA27:24 in lower 4 bits of device reg */ | |
889 | tf->device |= scsicmd[6]; | |
890 | ||
891 | qc->nsect = scsicmd[13]; | |
892 | } | |
893 | ||
894 | tf->nsect = scsicmd[13]; | |
895 | tf->lbal = scsicmd[9]; | |
896 | tf->lbam = scsicmd[8]; | |
897 | tf->lbah = scsicmd[7]; | |
898 | ||
899 | VPRINTK("sixteen-byte command\n"); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | DPRINTK("no-byte command\n"); | |
904 | return 1; | |
905 | } | |
906 | ||
907 | static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) | |
908 | { | |
909 | struct scsi_cmnd *cmd = qc->scsicmd; | |
b095518e JG |
910 | int need_sense = drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ); |
911 | ||
912 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
913 | * user mandated it or if there's an error. Note that if we | |
914 | * generate because the user forced us to, a check condition | |
915 | * is generated and the ATA register values are returned | |
916 | * whether the command completed successfully or not. If there | |
917 | * was no error, SK, ASC and ASCQ will all be zero. | |
918 | */ | |
919 | if (((cmd->cmnd[0] == ATA_16) || (cmd->cmnd[0] == ATA_12)) && | |
920 | ((cmd->cmnd[2] & 0x20) || need_sense)) { | |
921 | ata_gen_ata_desc_sense(qc); | |
922 | } else { | |
923 | if (!need_sense) { | |
924 | cmd->result = SAM_STAT_GOOD; | |
925 | } else { | |
926 | /* TODO: decide which descriptor format to use | |
927 | * for 48b LBA devices and call that here | |
928 | * instead of the fixed desc, which is only | |
929 | * good for smaller LBA (and maybe CHS?) | |
930 | * devices. | |
931 | */ | |
932 | ata_gen_fixed_sense(qc); | |
933 | } | |
934 | } | |
1da177e4 | 935 | |
b095518e JG |
936 | if (need_sense) { |
937 | /* The ata_gen_..._sense routines fill in tf */ | |
938 | ata_dump_status(qc->ap->id, &qc->tf); | |
939 | } | |
1da177e4 LT |
940 | |
941 | qc->scsidone(cmd); | |
942 | ||
943 | return 0; | |
944 | } | |
945 | ||
946 | /** | |
947 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
948 | * @ap: ATA port to which the command is addressed | |
949 | * @dev: ATA device to which the command is addressed | |
950 | * @cmd: SCSI command to execute | |
951 | * @done: SCSI command completion function | |
952 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
953 | * | |
954 | * Our ->queuecommand() function has decided that the SCSI | |
955 | * command issued can be directly translated into an ATA | |
956 | * command, rather than handled internally. | |
957 | * | |
958 | * This function sets up an ata_queued_cmd structure for the | |
959 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
960 | * | |
961 | * LOCKING: | |
962 | * spin_lock_irqsave(host_set lock) | |
963 | */ | |
964 | ||
965 | static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, | |
966 | struct scsi_cmnd *cmd, | |
967 | void (*done)(struct scsi_cmnd *), | |
968 | ata_xlat_func_t xlat_func) | |
969 | { | |
970 | struct ata_queued_cmd *qc; | |
971 | u8 *scsicmd = cmd->cmnd; | |
972 | ||
973 | VPRINTK("ENTER\n"); | |
974 | ||
975 | qc = ata_scsi_qc_new(ap, dev, cmd, done); | |
976 | if (!qc) | |
977 | return; | |
978 | ||
979 | /* data is present; dma-map it */ | |
b095518e JG |
980 | if (cmd->sc_data_direction == SCSI_DATA_READ || |
981 | cmd->sc_data_direction == SCSI_DATA_WRITE) { | |
1da177e4 LT |
982 | if (unlikely(cmd->request_bufflen < 1)) { |
983 | printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", | |
984 | ap->id, dev->devno); | |
985 | goto err_out; | |
986 | } | |
987 | ||
988 | if (cmd->use_sg) | |
989 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
990 | else | |
991 | ata_sg_init_one(qc, cmd->request_buffer, | |
992 | cmd->request_bufflen); | |
993 | ||
994 | qc->dma_dir = cmd->sc_data_direction; | |
995 | } | |
996 | ||
997 | qc->complete_fn = ata_scsi_qc_complete; | |
998 | ||
999 | if (xlat_func(qc, scsicmd)) | |
1000 | goto err_out; | |
1da177e4 LT |
1001 | /* select device, send command to hardware */ |
1002 | if (ata_qc_issue(qc)) | |
1003 | goto err_out; | |
1004 | ||
1005 | VPRINTK("EXIT\n"); | |
1006 | return; | |
1007 | ||
1008 | err_out: | |
1009 | ata_qc_free(qc); | |
1010 | ata_bad_cdb(cmd, done); | |
1011 | DPRINTK("EXIT - badcmd\n"); | |
1012 | } | |
1013 | ||
1014 | /** | |
1015 | * ata_scsi_rbuf_get - Map response buffer. | |
1016 | * @cmd: SCSI command containing buffer to be mapped. | |
1017 | * @buf_out: Pointer to mapped area. | |
1018 | * | |
1019 | * Maps buffer contained within SCSI command @cmd. | |
1020 | * | |
1021 | * LOCKING: | |
1022 | * spin_lock_irqsave(host_set lock) | |
1023 | * | |
1024 | * RETURNS: | |
1025 | * Length of response buffer. | |
1026 | */ | |
1027 | ||
1028 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1029 | { | |
1030 | u8 *buf; | |
1031 | unsigned int buflen; | |
1032 | ||
1033 | if (cmd->use_sg) { | |
1034 | struct scatterlist *sg; | |
1035 | ||
1036 | sg = (struct scatterlist *) cmd->request_buffer; | |
1037 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
1038 | buflen = sg->length; | |
1039 | } else { | |
1040 | buf = cmd->request_buffer; | |
1041 | buflen = cmd->request_bufflen; | |
1042 | } | |
1043 | ||
1044 | *buf_out = buf; | |
1045 | return buflen; | |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1050 | * @cmd: SCSI command containing buffer to be unmapped. | |
1051 | * @buf: buffer to unmap | |
1052 | * | |
1053 | * Unmaps response buffer contained within @cmd. | |
1054 | * | |
1055 | * LOCKING: | |
1056 | * spin_lock_irqsave(host_set lock) | |
1057 | */ | |
1058 | ||
1059 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1060 | { | |
1061 | if (cmd->use_sg) { | |
1062 | struct scatterlist *sg; | |
1063 | ||
1064 | sg = (struct scatterlist *) cmd->request_buffer; | |
1065 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | /** | |
1070 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1071 | * @args: device IDENTIFY data / SCSI command of interest. | |
1072 | * @actor: Callback hook for desired SCSI command simulator | |
1073 | * | |
1074 | * Takes care of the hard work of simulating a SCSI command... | |
1075 | * Mapping the response buffer, calling the command's handler, | |
1076 | * and handling the handler's return value. This return value | |
1077 | * indicates whether the handler wishes the SCSI command to be | |
1078 | * completed successfully, or not. | |
1079 | * | |
1080 | * LOCKING: | |
1081 | * spin_lock_irqsave(host_set lock) | |
1082 | */ | |
1083 | ||
1084 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1085 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1086 | u8 *rbuf, unsigned int buflen)) | |
1087 | { | |
1088 | u8 *rbuf; | |
1089 | unsigned int buflen, rc; | |
1090 | struct scsi_cmnd *cmd = args->cmd; | |
1091 | ||
1092 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1093 | memset(rbuf, 0, buflen); | |
1094 | rc = actor(args, rbuf, buflen); | |
1095 | ata_scsi_rbuf_put(cmd, rbuf); | |
1096 | ||
1097 | if (rc) | |
1098 | ata_bad_cdb(cmd, args->done); | |
1099 | else { | |
1100 | cmd->result = SAM_STAT_GOOD; | |
1101 | args->done(cmd); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | /** | |
1106 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1107 | * @args: device IDENTIFY data / SCSI command of interest. | |
1108 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1109 | * @buflen: Response buffer length. | |
1110 | * | |
1111 | * Returns standard device identification data associated | |
1112 | * with non-EVPD INQUIRY command output. | |
1113 | * | |
1114 | * LOCKING: | |
1115 | * spin_lock_irqsave(host_set lock) | |
1116 | */ | |
1117 | ||
1118 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1119 | unsigned int buflen) | |
1120 | { | |
1121 | u8 hdr[] = { | |
1122 | TYPE_DISK, | |
1123 | 0, | |
1124 | 0x5, /* claim SPC-3 version compatibility */ | |
1125 | 2, | |
1126 | 95 - 4 | |
1127 | }; | |
1128 | ||
1129 | /* set scsi removeable (RMB) bit per ata bit */ | |
1130 | if (ata_id_removeable(args->id)) | |
1131 | hdr[1] |= (1 << 7); | |
1132 | ||
1133 | VPRINTK("ENTER\n"); | |
1134 | ||
1135 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1136 | ||
1137 | if (buflen > 35) { | |
1138 | memcpy(&rbuf[8], "ATA ", 8); | |
1139 | ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); | |
1140 | ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1141 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1142 | memcpy(&rbuf[32], "n/a ", 4); | |
1143 | } | |
1144 | ||
1145 | if (buflen > 63) { | |
1146 | const u8 versions[] = { | |
1147 | 0x60, /* SAM-3 (no version claimed) */ | |
1148 | ||
1149 | 0x03, | |
1150 | 0x20, /* SBC-2 (no version claimed) */ | |
1151 | ||
1152 | 0x02, | |
1153 | 0x60 /* SPC-3 (no version claimed) */ | |
1154 | }; | |
1155 | ||
1156 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1157 | } | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | /** | |
1163 | * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages | |
1164 | * @args: device IDENTIFY data / SCSI command of interest. | |
1165 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1166 | * @buflen: Response buffer length. | |
1167 | * | |
1168 | * Returns list of inquiry EVPD pages available. | |
1169 | * | |
1170 | * LOCKING: | |
1171 | * spin_lock_irqsave(host_set lock) | |
1172 | */ | |
1173 | ||
1174 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1175 | unsigned int buflen) | |
1176 | { | |
1177 | const u8 pages[] = { | |
1178 | 0x00, /* page 0x00, this page */ | |
1179 | 0x80, /* page 0x80, unit serial no page */ | |
1180 | 0x83 /* page 0x83, device ident page */ | |
1181 | }; | |
1182 | rbuf[3] = sizeof(pages); /* number of supported EVPD pages */ | |
1183 | ||
1184 | if (buflen > 6) | |
1185 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1186 | ||
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number | |
1192 | * @args: device IDENTIFY data / SCSI command of interest. | |
1193 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1194 | * @buflen: Response buffer length. | |
1195 | * | |
1196 | * Returns ATA device serial number. | |
1197 | * | |
1198 | * LOCKING: | |
1199 | * spin_lock_irqsave(host_set lock) | |
1200 | */ | |
1201 | ||
1202 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1203 | unsigned int buflen) | |
1204 | { | |
1205 | const u8 hdr[] = { | |
1206 | 0, | |
1207 | 0x80, /* this page code */ | |
1208 | 0, | |
1209 | ATA_SERNO_LEN, /* page len */ | |
1210 | }; | |
1211 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1212 | ||
1213 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
1214 | ata_dev_id_string(args->id, (unsigned char *) &rbuf[4], | |
1215 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1216 | ||
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | static const char *inq_83_str = "Linux ATA-SCSI simulator"; | |
1221 | ||
1222 | /** | |
1223 | * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity | |
1224 | * @args: device IDENTIFY data / SCSI command of interest. | |
1225 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1226 | * @buflen: Response buffer length. | |
1227 | * | |
1228 | * Returns device identification. Currently hardcoded to | |
1229 | * return "Linux ATA-SCSI simulator". | |
1230 | * | |
1231 | * LOCKING: | |
1232 | * spin_lock_irqsave(host_set lock) | |
1233 | */ | |
1234 | ||
1235 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1236 | unsigned int buflen) | |
1237 | { | |
1238 | rbuf[1] = 0x83; /* this page code */ | |
1239 | rbuf[3] = 4 + strlen(inq_83_str); /* page len */ | |
1240 | ||
1241 | /* our one and only identification descriptor (vendor-specific) */ | |
1242 | if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) { | |
1243 | rbuf[4 + 0] = 2; /* code set: ASCII */ | |
1244 | rbuf[4 + 3] = strlen(inq_83_str); | |
1245 | memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str)); | |
1246 | } | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | /** | |
0cba632b | 1252 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1253 | * @args: device IDENTIFY data / SCSI command of interest. |
1254 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1255 | * @buflen: Response buffer length. | |
1256 | * | |
1257 | * No operation. Simply returns success to caller, to indicate | |
1258 | * that the caller should successfully complete this SCSI command. | |
1259 | * | |
1260 | * LOCKING: | |
1261 | * spin_lock_irqsave(host_set lock) | |
1262 | */ | |
1263 | ||
1264 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1265 | unsigned int buflen) | |
1266 | { | |
1267 | VPRINTK("ENTER\n"); | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | /** | |
1272 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1273 | * @ptr_io: (input/output) Location to store more output data | |
1274 | * @last: End of output data buffer | |
1275 | * @buf: Pointer to BLOB being added to output buffer | |
1276 | * @buflen: Length of BLOB | |
1277 | * | |
1278 | * Store MODE SENSE data on an output buffer. | |
1279 | * | |
1280 | * LOCKING: | |
1281 | * None. | |
1282 | */ | |
1283 | ||
1284 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1285 | const u8 *buf, unsigned int buflen) | |
1286 | { | |
1287 | u8 *ptr = *ptr_io; | |
1288 | ||
1289 | if ((ptr + buflen - 1) > last) | |
1290 | return; | |
1291 | ||
1292 | memcpy(ptr, buf, buflen); | |
1293 | ||
1294 | ptr += buflen; | |
1295 | ||
1296 | *ptr_io = ptr; | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1301 | * @id: device IDENTIFY data | |
1302 | * @ptr_io: (input/output) Location to store more output data | |
1303 | * @last: End of output data buffer | |
1304 | * | |
1305 | * Generate a caching info page, which conditionally indicates | |
1306 | * write caching to the SCSI layer, depending on device | |
1307 | * capabilities. | |
1308 | * | |
1309 | * LOCKING: | |
1310 | * None. | |
1311 | */ | |
1312 | ||
1313 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1314 | const u8 *last) | |
1315 | { | |
1316 | u8 page[] = { | |
1317 | 0x8, /* page code */ | |
1318 | 0x12, /* page length */ | |
1319 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */ | |
1320 | 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */ | |
1321 | }; | |
1322 | ||
1323 | if (ata_id_wcache_enabled(id)) | |
1324 | page[2] |= (1 << 2); /* write cache enable */ | |
1325 | if (!ata_id_rahead_enabled(id)) | |
1326 | page[12] |= (1 << 5); /* disable read ahead */ | |
1327 | ||
1328 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1329 | return sizeof(page); | |
1330 | } | |
1331 | ||
1332 | /** | |
1333 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1334 | * @dev: Device associated with this MODE SENSE command | |
1335 | * @ptr_io: (input/output) Location to store more output data | |
1336 | * @last: End of output data buffer | |
1337 | * | |
1338 | * Generate a generic MODE SENSE control mode page. | |
1339 | * | |
1340 | * LOCKING: | |
1341 | * None. | |
1342 | */ | |
1343 | ||
1344 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1345 | { | |
1346 | const u8 page[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30}; | |
1347 | ||
1348 | /* byte 2: set the descriptor format sense data bit (bit 2) | |
1349 | * since we need to support returning this format for SAT | |
1350 | * commands and any SCSI commands against a 48b LBA device. | |
1351 | */ | |
1352 | ||
1353 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1354 | return sizeof(page); | |
1355 | } | |
1356 | ||
1357 | /** | |
1358 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1359 | * @dev: Device associated with this MODE SENSE command | |
1360 | * @ptr_io: (input/output) Location to store more output data | |
1361 | * @last: End of output data buffer | |
1362 | * | |
1363 | * Generate a generic MODE SENSE r/w error recovery page. | |
1364 | * | |
1365 | * LOCKING: | |
1366 | * None. | |
1367 | */ | |
1368 | ||
1369 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1370 | { | |
1371 | const u8 page[] = { | |
1372 | 0x1, /* page code */ | |
1373 | 0xa, /* page length */ | |
1374 | (1 << 7) | (1 << 6), /* note auto r/w reallocation */ | |
1375 | 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */ | |
1376 | }; | |
1377 | ||
1378 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1379 | return sizeof(page); | |
1380 | } | |
1381 | ||
1382 | /** | |
1383 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1384 | * @args: device IDENTIFY data / SCSI command of interest. | |
1385 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1386 | * @buflen: Response buffer length. | |
1387 | * | |
1388 | * Simulate MODE SENSE commands. | |
1389 | * | |
1390 | * LOCKING: | |
1391 | * spin_lock_irqsave(host_set lock) | |
1392 | */ | |
1393 | ||
1394 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1395 | unsigned int buflen) | |
1396 | { | |
1397 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
1398 | unsigned int page_control, six_byte, output_len; | |
1399 | ||
1400 | VPRINTK("ENTER\n"); | |
1401 | ||
1402 | six_byte = (scsicmd[0] == MODE_SENSE); | |
1403 | ||
1404 | /* we only support saved and current values (which we treat | |
1405 | * in the same manner) | |
1406 | */ | |
1407 | page_control = scsicmd[2] >> 6; | |
1408 | if ((page_control != 0) && (page_control != 3)) | |
1409 | return 1; | |
1410 | ||
1411 | if (six_byte) | |
1412 | output_len = 4; | |
1413 | else | |
1414 | output_len = 8; | |
1415 | ||
1416 | p = rbuf + output_len; | |
1417 | last = rbuf + buflen - 1; | |
1418 | ||
1419 | switch(scsicmd[2] & 0x3f) { | |
1420 | case 0x01: /* r/w error recovery */ | |
1421 | output_len += ata_msense_rw_recovery(&p, last); | |
1422 | break; | |
1423 | ||
1424 | case 0x08: /* caching */ | |
1425 | output_len += ata_msense_caching(args->id, &p, last); | |
1426 | break; | |
1427 | ||
1428 | case 0x0a: { /* control mode */ | |
1429 | output_len += ata_msense_ctl_mode(&p, last); | |
1430 | break; | |
1431 | } | |
1432 | ||
1433 | case 0x3f: /* all pages */ | |
1434 | output_len += ata_msense_rw_recovery(&p, last); | |
1435 | output_len += ata_msense_caching(args->id, &p, last); | |
1436 | output_len += ata_msense_ctl_mode(&p, last); | |
1437 | break; | |
1438 | ||
1439 | default: /* invalid page code */ | |
1440 | return 1; | |
1441 | } | |
1442 | ||
1443 | if (six_byte) { | |
1444 | output_len--; | |
1445 | rbuf[0] = output_len; | |
1446 | } else { | |
1447 | output_len -= 2; | |
1448 | rbuf[0] = output_len >> 8; | |
1449 | rbuf[1] = output_len; | |
1450 | } | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
1457 | * @args: device IDENTIFY data / SCSI command of interest. | |
1458 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1459 | * @buflen: Response buffer length. | |
1460 | * | |
1461 | * Simulate READ CAPACITY commands. | |
1462 | * | |
1463 | * LOCKING: | |
1464 | * spin_lock_irqsave(host_set lock) | |
1465 | */ | |
1466 | ||
1467 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
1468 | unsigned int buflen) | |
1469 | { | |
1470 | u64 n_sectors; | |
1471 | u32 tmp; | |
1472 | ||
1473 | VPRINTK("ENTER\n"); | |
1474 | ||
1475 | if (ata_id_has_lba48(args->id)) | |
1476 | n_sectors = ata_id_u64(args->id, 100); | |
1477 | else | |
1478 | n_sectors = ata_id_u32(args->id, 60); | |
1479 | n_sectors--; /* ATA TotalUserSectors - 1 */ | |
1480 | ||
1481 | tmp = n_sectors; /* note: truncates, if lba48 */ | |
1482 | if (args->cmd->cmnd[0] == READ_CAPACITY) { | |
1483 | /* sector count, 32-bit */ | |
1484 | rbuf[0] = tmp >> (8 * 3); | |
1485 | rbuf[1] = tmp >> (8 * 2); | |
1486 | rbuf[2] = tmp >> (8 * 1); | |
1487 | rbuf[3] = tmp; | |
1488 | ||
1489 | /* sector size */ | |
1490 | tmp = ATA_SECT_SIZE; | |
1491 | rbuf[6] = tmp >> 8; | |
1492 | rbuf[7] = tmp; | |
1493 | ||
1494 | } else { | |
1495 | /* sector count, 64-bit */ | |
1496 | rbuf[2] = n_sectors >> (8 * 7); | |
1497 | rbuf[3] = n_sectors >> (8 * 6); | |
1498 | rbuf[4] = n_sectors >> (8 * 5); | |
1499 | rbuf[5] = n_sectors >> (8 * 4); | |
1500 | rbuf[6] = tmp >> (8 * 3); | |
1501 | rbuf[7] = tmp >> (8 * 2); | |
1502 | rbuf[8] = tmp >> (8 * 1); | |
1503 | rbuf[9] = tmp; | |
1504 | ||
1505 | /* sector size */ | |
1506 | tmp = ATA_SECT_SIZE; | |
1507 | rbuf[12] = tmp >> 8; | |
1508 | rbuf[13] = tmp; | |
1509 | } | |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /** | |
1515 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
1516 | * @args: device IDENTIFY data / SCSI command of interest. | |
1517 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1518 | * @buflen: Response buffer length. | |
1519 | * | |
1520 | * Simulate REPORT LUNS command. | |
1521 | * | |
1522 | * LOCKING: | |
1523 | * spin_lock_irqsave(host_set lock) | |
1524 | */ | |
1525 | ||
1526 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
1527 | unsigned int buflen) | |
1528 | { | |
1529 | VPRINTK("ENTER\n"); | |
1530 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
1531 | ||
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | /** | |
1536 | * ata_scsi_badcmd - End a SCSI request with an error | |
1537 | * @cmd: SCSI request to be handled | |
1538 | * @done: SCSI command completion function | |
1539 | * @asc: SCSI-defined additional sense code | |
1540 | * @ascq: SCSI-defined additional sense code qualifier | |
1541 | * | |
1542 | * Helper function that completes a SCSI command with | |
1543 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
1544 | * and the specified additional sense codes. | |
1545 | * | |
1546 | * LOCKING: | |
1547 | * spin_lock_irqsave(host_set lock) | |
1548 | */ | |
1549 | ||
1550 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
1551 | { | |
1552 | DPRINTK("ENTER\n"); | |
1553 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
1554 | ||
1555 | cmd->sense_buffer[0] = 0x70; | |
1556 | cmd->sense_buffer[2] = ILLEGAL_REQUEST; | |
1557 | cmd->sense_buffer[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */ | |
1558 | cmd->sense_buffer[12] = asc; | |
1559 | cmd->sense_buffer[13] = ascq; | |
1560 | ||
1561 | done(cmd); | |
1562 | } | |
1563 | ||
1564 | static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) | |
1565 | { | |
1566 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1567 | ||
1568 | if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) { | |
1569 | DPRINTK("request check condition\n"); | |
1570 | ||
1571 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
1572 | ||
1573 | qc->scsidone(cmd); | |
1574 | ||
1575 | return 1; | |
1576 | } else { | |
1577 | u8 *scsicmd = cmd->cmnd; | |
1578 | ||
1579 | if (scsicmd[0] == INQUIRY) { | |
1580 | u8 *buf = NULL; | |
1581 | unsigned int buflen; | |
1582 | ||
1583 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
1584 | buf[2] = 0x5; | |
1585 | buf[3] = (buf[3] & 0xf0) | 2; | |
1586 | ata_scsi_rbuf_put(cmd, buf); | |
1587 | } | |
1588 | cmd->result = SAM_STAT_GOOD; | |
1589 | } | |
1590 | ||
1591 | qc->scsidone(cmd); | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | /** | |
1596 | * atapi_xlat - Initialize PACKET taskfile | |
1597 | * @qc: command structure to be initialized | |
1598 | * @scsicmd: SCSI CDB associated with this PACKET command | |
1599 | * | |
1600 | * LOCKING: | |
1601 | * spin_lock_irqsave(host_set lock) | |
1602 | * | |
1603 | * RETURNS: | |
1604 | * Zero on success, non-zero on failure. | |
1605 | */ | |
1606 | ||
1607 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) | |
1608 | { | |
1609 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1610 | struct ata_device *dev = qc->dev; | |
1611 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
b095518e | 1612 | int nodata = (cmd->sc_data_direction == SCSI_DATA_NONE); |
1da177e4 LT |
1613 | |
1614 | if (!using_pio) | |
1615 | /* Check whether ATAPI DMA is safe */ | |
1616 | if (ata_check_atapi_dma(qc)) | |
1617 | using_pio = 1; | |
1618 | ||
1619 | memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len); | |
1620 | ||
1621 | qc->complete_fn = atapi_qc_complete; | |
1622 | ||
1623 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
b095518e | 1624 | if (cmd->sc_data_direction == SCSI_DATA_WRITE) { |
1da177e4 LT |
1625 | qc->tf.flags |= ATA_TFLAG_WRITE; |
1626 | DPRINTK("direction: write\n"); | |
1627 | } | |
1628 | ||
1629 | qc->tf.command = ATA_CMD_PACKET; | |
1630 | ||
1631 | /* no data, or PIO data xfer */ | |
1632 | if (using_pio || nodata) { | |
1633 | if (nodata) | |
1634 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
1635 | else | |
1636 | qc->tf.protocol = ATA_PROT_ATAPI; | |
1637 | qc->tf.lbam = (8 * 1024) & 0xff; | |
1638 | qc->tf.lbah = (8 * 1024) >> 8; | |
1639 | } | |
1640 | ||
1641 | /* DMA data xfer */ | |
1642 | else { | |
1643 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
1644 | qc->tf.feature |= ATAPI_PKT_DMA; | |
1645 | ||
1646 | #ifdef ATAPI_ENABLE_DMADIR | |
1647 | /* some SATA bridges need us to indicate data xfer direction */ | |
b095518e | 1648 | if (cmd->sc_data_direction != SCSI_DATA_WRITE) |
1da177e4 LT |
1649 | qc->tf.feature |= ATAPI_DMADIR; |
1650 | #endif | |
1651 | } | |
1652 | ||
1653 | qc->nbytes = cmd->bufflen; | |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | /** | |
1659 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
1660 | * @ap: ATA port to which the device is attached | |
1661 | * @scsidev: SCSI device from which we derive the ATA device | |
1662 | * | |
1663 | * Given various information provided in struct scsi_cmnd, | |
1664 | * map that onto an ATA bus, and using that mapping | |
1665 | * determine which ata_device is associated with the | |
1666 | * SCSI command to be sent. | |
1667 | * | |
1668 | * LOCKING: | |
1669 | * spin_lock_irqsave(host_set lock) | |
1670 | * | |
1671 | * RETURNS: | |
1672 | * Associated ATA device, or %NULL if not found. | |
1673 | */ | |
1674 | ||
1675 | static struct ata_device * | |
1676 | ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev) | |
1677 | { | |
1678 | struct ata_device *dev; | |
1679 | ||
1680 | /* skip commands not addressed to targets we simulate */ | |
1681 | if (likely(scsidev->id < ATA_MAX_DEVICES)) | |
1682 | dev = &ap->device[scsidev->id]; | |
1683 | else | |
1684 | return NULL; | |
1685 | ||
1686 | if (unlikely((scsidev->channel != 0) || | |
1687 | (scsidev->lun != 0))) | |
1688 | return NULL; | |
1689 | ||
1690 | if (unlikely(!ata_dev_present(dev))) | |
1691 | return NULL; | |
1692 | ||
1693 | #ifndef ATA_ENABLE_ATAPI | |
1694 | if (unlikely(dev->class == ATA_DEV_ATAPI)) | |
1695 | return NULL; | |
1696 | #endif | |
1697 | ||
1698 | return dev; | |
1699 | } | |
1700 | ||
b095518e JG |
1701 | /* |
1702 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
1703 | * @byte1: Byte 1 from pass-thru CDB. | |
1704 | * | |
1705 | * RETURNS: | |
1706 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
1707 | */ | |
1708 | static u8 | |
1709 | ata_scsi_map_proto(u8 byte1) | |
1710 | { | |
1711 | switch((byte1 & 0x1e) >> 1) { | |
1712 | case 3: /* Non-data */ | |
1713 | return ATA_PROT_NODATA; | |
1714 | ||
1715 | case 6: /* DMA */ | |
1716 | return ATA_PROT_DMA; | |
1717 | ||
1718 | case 4: /* PIO Data-in */ | |
1719 | case 5: /* PIO Data-out */ | |
1720 | if (byte1 & 0xe0) { | |
1721 | return ATA_PROT_PIO_MULT; | |
1722 | } | |
1723 | return ATA_PROT_PIO; | |
1724 | ||
1725 | case 10: /* Device Reset */ | |
1726 | case 0: /* Hard Reset */ | |
1727 | case 1: /* SRST */ | |
1728 | case 2: /* Bus Idle */ | |
1729 | case 7: /* Packet */ | |
1730 | case 8: /* DMA Queued */ | |
1731 | case 9: /* Device Diagnostic */ | |
1732 | case 11: /* UDMA Data-in */ | |
1733 | case 12: /* UDMA Data-Out */ | |
1734 | case 13: /* FPDMA */ | |
1735 | default: /* Reserved */ | |
1736 | break; | |
1737 | } | |
1738 | ||
1739 | return ATA_PROT_UNKNOWN; | |
1740 | } | |
1741 | ||
1742 | /** | |
1743 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
1744 | * @qc: command structure to be initialized | |
1745 | * @cmd: SCSI command to convert | |
1746 | * | |
1747 | * Handles either 12 or 16-byte versions of the CDB. | |
1748 | * | |
1749 | * RETURNS: | |
1750 | * Zero on success, non-zero on failure. | |
1751 | */ | |
1752 | static unsigned int | |
1753 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, u8 *scsicmd) | |
1754 | { | |
1755 | struct ata_taskfile *tf = &(qc->tf); | |
1756 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1757 | ||
1758 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) | |
1759 | return 1; | |
1760 | ||
1761 | /* | |
1762 | * 12 and 16 byte CDBs use different offsets to | |
1763 | * provide the various register values. | |
1764 | */ | |
1765 | if (scsicmd[0] == ATA_16) { | |
1766 | /* | |
1767 | * 16-byte CDB - may contain extended commands. | |
1768 | * | |
1769 | * If that is the case, copy the upper byte register values. | |
1770 | */ | |
1771 | if (scsicmd[1] & 0x01) { | |
1772 | tf->hob_feature = scsicmd[3]; | |
1773 | tf->hob_nsect = scsicmd[5]; | |
1774 | tf->hob_lbal = scsicmd[7]; | |
1775 | tf->hob_lbam = scsicmd[9]; | |
1776 | tf->hob_lbah = scsicmd[11]; | |
1777 | tf->flags |= ATA_TFLAG_LBA48; | |
1778 | } else | |
1779 | tf->flags &= ~ATA_TFLAG_LBA48; | |
1780 | ||
1781 | /* | |
1782 | * Always copy low byte, device and command registers. | |
1783 | */ | |
1784 | tf->feature = scsicmd[4]; | |
1785 | tf->nsect = scsicmd[6]; | |
1786 | tf->lbal = scsicmd[8]; | |
1787 | tf->lbam = scsicmd[10]; | |
1788 | tf->lbah = scsicmd[12]; | |
1789 | tf->device = scsicmd[13]; | |
1790 | tf->command = scsicmd[14]; | |
1791 | } else { | |
1792 | /* | |
1793 | * 12-byte CDB - incapable of extended commands. | |
1794 | */ | |
1795 | tf->flags &= ~ATA_TFLAG_LBA48; | |
1796 | ||
1797 | tf->feature = scsicmd[3]; | |
1798 | tf->nsect = scsicmd[4]; | |
1799 | tf->lbal = scsicmd[5]; | |
1800 | tf->lbam = scsicmd[6]; | |
1801 | tf->lbah = scsicmd[7]; | |
1802 | tf->device = scsicmd[8]; | |
1803 | tf->command = scsicmd[9]; | |
1804 | } | |
1805 | ||
1806 | /* | |
1807 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
1808 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
1809 | * by an update to hardware-specific registers for each | |
1810 | * controller (i.e. the reason for ->set_piomode(), | |
1811 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
1812 | */ | |
1813 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
1814 | && (tf->feature == SETFEATURES_XFER)) | |
1815 | return 1; | |
1816 | ||
1817 | /* | |
1818 | * Set flags so that all registers will be written, | |
1819 | * and pass on write indication (used for PIO/DMA | |
1820 | * setup.) | |
1821 | */ | |
1822 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
1823 | ||
1824 | if (cmd->sc_data_direction == SCSI_DATA_WRITE) | |
1825 | tf->flags |= ATA_TFLAG_WRITE; | |
1826 | ||
1827 | /* | |
1828 | * Set transfer length. | |
1829 | * | |
1830 | * TODO: find out if we need to do more here to | |
1831 | * cover scatter/gather case. | |
1832 | */ | |
1833 | qc->nsect = cmd->bufflen / ATA_SECT_SIZE; | |
1834 | ||
1835 | return 0; | |
1836 | } | |
1837 | ||
1da177e4 LT |
1838 | /** |
1839 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
1840 | * @dev: ATA device | |
1841 | * @cmd: SCSI command opcode to consider | |
1842 | * | |
1843 | * Look up the SCSI command given, and determine whether the | |
1844 | * SCSI command is to be translated or simulated. | |
1845 | * | |
1846 | * RETURNS: | |
1847 | * Pointer to translation function if possible, %NULL if not. | |
1848 | */ | |
1849 | ||
1850 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
1851 | { | |
1852 | switch (cmd) { | |
1853 | case READ_6: | |
1854 | case READ_10: | |
1855 | case READ_16: | |
1856 | ||
1857 | case WRITE_6: | |
1858 | case WRITE_10: | |
1859 | case WRITE_16: | |
1860 | return ata_scsi_rw_xlat; | |
1861 | ||
1862 | case SYNCHRONIZE_CACHE: | |
1863 | if (ata_try_flush_cache(dev)) | |
1864 | return ata_scsi_flush_xlat; | |
1865 | break; | |
1866 | ||
1867 | case VERIFY: | |
1868 | case VERIFY_16: | |
1869 | return ata_scsi_verify_xlat; | |
b095518e JG |
1870 | |
1871 | case ATA_12: | |
1872 | case ATA_16: | |
1873 | return ata_scsi_pass_thru; | |
1da177e4 LT |
1874 | } |
1875 | ||
1876 | return NULL; | |
1877 | } | |
1878 | ||
1879 | /** | |
1880 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
1881 | * @ap: ATA port to which the command was being sent | |
1882 | * @cmd: SCSI command to dump | |
1883 | * | |
1884 | * Prints the contents of a SCSI command via printk(). | |
1885 | */ | |
1886 | ||
1887 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
1888 | struct scsi_cmnd *cmd) | |
1889 | { | |
1890 | #ifdef ATA_DEBUG | |
1891 | struct scsi_device *scsidev = cmd->device; | |
1892 | u8 *scsicmd = cmd->cmnd; | |
1893 | ||
1894 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
1895 | ap->id, | |
1896 | scsidev->channel, scsidev->id, scsidev->lun, | |
1897 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
1898 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
1899 | scsicmd[8]); | |
1900 | #endif | |
1901 | } | |
1902 | ||
1903 | /** | |
1904 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
1905 | * @cmd: SCSI command to be sent | |
1906 | * @done: Completion function, called when command is complete | |
1907 | * | |
1908 | * In some cases, this function translates SCSI commands into | |
1909 | * ATA taskfiles, and queues the taskfiles to be sent to | |
1910 | * hardware. In other cases, this function simulates a | |
1911 | * SCSI device by evaluating and responding to certain | |
1912 | * SCSI commands. This creates the overall effect of | |
1913 | * ATA and ATAPI devices appearing as SCSI devices. | |
1914 | * | |
1915 | * LOCKING: | |
1916 | * Releases scsi-layer-held lock, and obtains host_set lock. | |
1917 | * | |
1918 | * RETURNS: | |
1919 | * Zero. | |
1920 | */ | |
1921 | ||
1922 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
1923 | { | |
1924 | struct ata_port *ap; | |
1925 | struct ata_device *dev; | |
1926 | struct scsi_device *scsidev = cmd->device; | |
1927 | ||
1928 | ap = (struct ata_port *) &scsidev->host->hostdata[0]; | |
1929 | ||
1930 | ata_scsi_dump_cdb(ap, cmd); | |
1931 | ||
1932 | dev = ata_scsi_find_dev(ap, scsidev); | |
1933 | if (unlikely(!dev)) { | |
1934 | cmd->result = (DID_BAD_TARGET << 16); | |
1935 | done(cmd); | |
1936 | goto out_unlock; | |
1937 | } | |
1938 | ||
1939 | if (dev->class == ATA_DEV_ATA) { | |
1940 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
1941 | cmd->cmnd[0]); | |
1942 | ||
1943 | if (xlat_func) | |
1944 | ata_scsi_translate(ap, dev, cmd, done, xlat_func); | |
1945 | else | |
1946 | ata_scsi_simulate(dev->id, cmd, done); | |
1947 | } else | |
1948 | ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); | |
1949 | ||
1950 | out_unlock: | |
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | /** | |
1955 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
1956 | * @id: current IDENTIFY data for target device. | |
1957 | * @cmd: SCSI command being sent to device. | |
1958 | * @done: SCSI command completion function. | |
1959 | * | |
1960 | * Interprets and directly executes a select list of SCSI commands | |
1961 | * that can be handled internally. | |
1962 | * | |
1963 | * LOCKING: | |
1964 | * spin_lock_irqsave(host_set lock) | |
1965 | */ | |
1966 | ||
1967 | void ata_scsi_simulate(u16 *id, | |
1968 | struct scsi_cmnd *cmd, | |
1969 | void (*done)(struct scsi_cmnd *)) | |
1970 | { | |
1971 | struct ata_scsi_args args; | |
1972 | u8 *scsicmd = cmd->cmnd; | |
1973 | ||
1974 | args.id = id; | |
1975 | args.cmd = cmd; | |
1976 | args.done = done; | |
1977 | ||
1978 | switch(scsicmd[0]) { | |
1979 | /* no-op's, complete with success */ | |
1980 | case SYNCHRONIZE_CACHE: | |
1981 | case REZERO_UNIT: | |
1982 | case SEEK_6: | |
1983 | case SEEK_10: | |
1984 | case TEST_UNIT_READY: | |
1985 | case FORMAT_UNIT: /* FIXME: correct? */ | |
1986 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
1987 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
1988 | break; | |
1989 | ||
1990 | case INQUIRY: | |
1991 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
1992 | ata_bad_cdb(cmd, done); | |
1993 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ | |
1994 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
1995 | else if (scsicmd[2] == 0x00) | |
1996 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
1997 | else if (scsicmd[2] == 0x80) | |
1998 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
1999 | else if (scsicmd[2] == 0x83) | |
2000 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2001 | else | |
2002 | ata_bad_cdb(cmd, done); | |
2003 | break; | |
2004 | ||
2005 | case MODE_SENSE: | |
2006 | case MODE_SENSE_10: | |
2007 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2008 | break; | |
2009 | ||
2010 | case MODE_SELECT: /* unconditionally return */ | |
2011 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
2012 | ata_bad_cdb(cmd, done); | |
2013 | break; | |
2014 | ||
2015 | case READ_CAPACITY: | |
2016 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2017 | break; | |
2018 | ||
2019 | case SERVICE_ACTION_IN: | |
2020 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2021 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2022 | else | |
2023 | ata_bad_cdb(cmd, done); | |
2024 | break; | |
2025 | ||
2026 | case REPORT_LUNS: | |
2027 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2028 | break; | |
2029 | ||
b095518e | 2030 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2031 | case REQUEST_SENSE: |
2032 | ||
2033 | /* all other commands */ | |
2034 | default: | |
2035 | ata_bad_scsiop(cmd, done); | |
2036 | break; | |
2037 | } | |
2038 | } | |
2039 |