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1 | /* | |
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 | * | |
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/scsi_host.h> | |
41 | #include <scsi/scsi_cmnd.h> | |
42 | #include <scsi/scsi_eh.h> | |
43 | #include <scsi/scsi_device.h> | |
44 | #include <scsi/scsi_tcq.h> | |
45 | #include <scsi/scsi_transport.h> | |
46 | #include <linux/libata.h> | |
47 | #include <linux/hdreg.h> | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include "libata.h" | |
51 | ||
52 | #define SECTOR_SIZE 512 | |
53 | ||
54 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); | |
55 | ||
56 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
57 | const struct scsi_device *scsidev); | |
58 | static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, | |
59 | const struct scsi_device *scsidev); | |
60 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
61 | unsigned int id, unsigned int lun); | |
62 | ||
63 | ||
64 | #define RW_RECOVERY_MPAGE 0x1 | |
65 | #define RW_RECOVERY_MPAGE_LEN 12 | |
66 | #define CACHE_MPAGE 0x8 | |
67 | #define CACHE_MPAGE_LEN 20 | |
68 | #define CONTROL_MPAGE 0xa | |
69 | #define CONTROL_MPAGE_LEN 12 | |
70 | #define ALL_MPAGES 0x3f | |
71 | #define ALL_SUB_MPAGES 0xff | |
72 | ||
73 | ||
74 | static const u8 def_rw_recovery_mpage[] = { | |
75 | RW_RECOVERY_MPAGE, | |
76 | RW_RECOVERY_MPAGE_LEN - 2, | |
77 | (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */ | |
78 | (1 << 6), /* ARRE (auto read reallocation) */ | |
79 | 0, /* read retry count */ | |
80 | 0, 0, 0, 0, | |
81 | 0, /* write retry count */ | |
82 | 0, 0, 0 | |
83 | }; | |
84 | ||
85 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { | |
86 | CACHE_MPAGE, | |
87 | CACHE_MPAGE_LEN - 2, | |
88 | 0, /* contains WCE, needs to be 0 for logic */ | |
89 | 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
90 | 0, /* contains DRA, needs to be 0 for logic */ | |
91 | 0, 0, 0, 0, 0, 0, 0 | |
92 | }; | |
93 | ||
94 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { | |
95 | CONTROL_MPAGE, | |
96 | CONTROL_MPAGE_LEN - 2, | |
97 | 2, /* DSENSE=0, GLTSD=1 */ | |
98 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ | |
99 | 0, 0, 0, 0, 0xff, 0xff, | |
100 | 0, 30 /* extended self test time, see 05-359r1 */ | |
101 | }; | |
102 | ||
103 | /* | |
104 | * libata transport template. libata doesn't do real transport stuff. | |
105 | * It just needs the eh_timed_out hook. | |
106 | */ | |
107 | static struct scsi_transport_template ata_scsi_transport_template = { | |
108 | .eh_strategy_handler = ata_scsi_error, | |
109 | .eh_timed_out = ata_scsi_timed_out, | |
110 | .user_scan = ata_scsi_user_scan, | |
111 | }; | |
112 | ||
113 | ||
114 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, | |
115 | void (*done)(struct scsi_cmnd *)) | |
116 | { | |
117 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
118 | /* "Invalid field in cbd" */ | |
119 | done(cmd); | |
120 | } | |
121 | ||
122 | /** | |
123 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. | |
124 | * @sdev: SCSI device for which BIOS geometry is to be determined | |
125 | * @bdev: block device associated with @sdev | |
126 | * @capacity: capacity of SCSI device | |
127 | * @geom: location to which geometry will be output | |
128 | * | |
129 | * Generic bios head/sector/cylinder calculator | |
130 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) | |
131 | * mapping. Some situations may arise where the disk is not | |
132 | * bootable if this is not used. | |
133 | * | |
134 | * LOCKING: | |
135 | * Defined by the SCSI layer. We don't really care. | |
136 | * | |
137 | * RETURNS: | |
138 | * Zero. | |
139 | */ | |
140 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
141 | sector_t capacity, int geom[]) | |
142 | { | |
143 | geom[0] = 255; | |
144 | geom[1] = 63; | |
145 | sector_div(capacity, 255*63); | |
146 | geom[2] = capacity; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | /** | |
152 | * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl | |
153 | * @sdev: SCSI device to get identify data for | |
154 | * @arg: User buffer area for identify data | |
155 | * | |
156 | * LOCKING: | |
157 | * Defined by the SCSI layer. We don't really care. | |
158 | * | |
159 | * RETURNS: | |
160 | * Zero on success, negative errno on error. | |
161 | */ | |
162 | static int ata_get_identity(struct scsi_device *sdev, void __user *arg) | |
163 | { | |
164 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
165 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
166 | u16 __user *dst = arg; | |
167 | char buf[40]; | |
168 | ||
169 | if (!dev) | |
170 | return -ENOMSG; | |
171 | ||
172 | if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) | |
173 | return -EFAULT; | |
174 | ||
175 | ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); | |
176 | if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) | |
177 | return -EFAULT; | |
178 | ||
179 | ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); | |
180 | if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) | |
181 | return -EFAULT; | |
182 | ||
183 | ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
184 | if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) | |
185 | return -EFAULT; | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | /** | |
191 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
192 | * @scsidev: Device to which we are issuing command | |
193 | * @arg: User provided data for issuing command | |
194 | * | |
195 | * LOCKING: | |
196 | * Defined by the SCSI layer. We don't really care. | |
197 | * | |
198 | * RETURNS: | |
199 | * Zero on success, negative errno on error. | |
200 | */ | |
201 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) | |
202 | { | |
203 | int rc = 0; | |
204 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
205 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; | |
206 | int argsize = 0; | |
207 | enum dma_data_direction data_dir; | |
208 | int cmd_result; | |
209 | ||
210 | if (arg == NULL) | |
211 | return -EINVAL; | |
212 | ||
213 | if (copy_from_user(args, arg, sizeof(args))) | |
214 | return -EFAULT; | |
215 | ||
216 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); | |
217 | if (!sensebuf) | |
218 | return -ENOMEM; | |
219 | ||
220 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
221 | ||
222 | if (args[3]) { | |
223 | argsize = SECTOR_SIZE * args[3]; | |
224 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
225 | if (argbuf == NULL) { | |
226 | rc = -ENOMEM; | |
227 | goto error; | |
228 | } | |
229 | ||
230 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
231 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
232 | block count in sector count field */ | |
233 | data_dir = DMA_FROM_DEVICE; | |
234 | } else { | |
235 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
236 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ | |
237 | data_dir = DMA_NONE; | |
238 | } | |
239 | ||
240 | scsi_cmd[0] = ATA_16; | |
241 | ||
242 | scsi_cmd[4] = args[2]; | |
243 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
244 | scsi_cmd[6] = args[3]; | |
245 | scsi_cmd[8] = args[1]; | |
246 | scsi_cmd[10] = 0x4f; | |
247 | scsi_cmd[12] = 0xc2; | |
248 | } else { | |
249 | scsi_cmd[6] = args[1]; | |
250 | } | |
251 | scsi_cmd[14] = args[0]; | |
252 | ||
253 | /* Good values for timeout and retries? Values below | |
254 | from scsi_ioctl_send_command() for default case... */ | |
255 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, | |
256 | sensebuf, (10*HZ), 5, 0); | |
257 | ||
258 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
259 | u8 *desc = sensebuf + 8; | |
260 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
261 | ||
262 | /* If we set cc then ATA pass-through will cause a | |
263 | * check condition even if no error. Filter that. */ | |
264 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
265 | struct scsi_sense_hdr sshdr; | |
266 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
267 | &sshdr); | |
268 | if (sshdr.sense_key==0 && | |
269 | sshdr.asc==0 && sshdr.ascq==0) | |
270 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; | |
271 | } | |
272 | ||
273 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
274 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
275 | desc[0] == 0x09 ) { /* code is "ATA Descriptor" */ | |
276 | args[0] = desc[13]; /* status */ | |
277 | args[1] = desc[3]; /* error */ | |
278 | args[2] = desc[5]; /* sector count (0:7) */ | |
279 | if (copy_to_user(arg, args, sizeof(args))) | |
280 | rc = -EFAULT; | |
281 | } | |
282 | } | |
283 | ||
284 | ||
285 | if (cmd_result) { | |
286 | rc = -EIO; | |
287 | goto error; | |
288 | } | |
289 | ||
290 | if ((argbuf) | |
291 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) | |
292 | rc = -EFAULT; | |
293 | error: | |
294 | kfree(sensebuf); | |
295 | kfree(argbuf); | |
296 | return rc; | |
297 | } | |
298 | ||
299 | /** | |
300 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
301 | * @scsidev: Device to which we are issuing command | |
302 | * @arg: User provided data for issuing command | |
303 | * | |
304 | * LOCKING: | |
305 | * Defined by the SCSI layer. We don't really care. | |
306 | * | |
307 | * RETURNS: | |
308 | * Zero on success, negative errno on error. | |
309 | */ | |
310 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
311 | { | |
312 | int rc = 0; | |
313 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
314 | u8 args[7], *sensebuf = NULL; | |
315 | int cmd_result; | |
316 | ||
317 | if (arg == NULL) | |
318 | return -EINVAL; | |
319 | ||
320 | if (copy_from_user(args, arg, sizeof(args))) | |
321 | return -EFAULT; | |
322 | ||
323 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); | |
324 | if (!sensebuf) | |
325 | return -ENOMEM; | |
326 | ||
327 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
328 | scsi_cmd[0] = ATA_16; | |
329 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
330 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ | |
331 | scsi_cmd[4] = args[1]; | |
332 | scsi_cmd[6] = args[2]; | |
333 | scsi_cmd[8] = args[3]; | |
334 | scsi_cmd[10] = args[4]; | |
335 | scsi_cmd[12] = args[5]; | |
336 | scsi_cmd[13] = args[6] & 0x4f; | |
337 | scsi_cmd[14] = args[0]; | |
338 | ||
339 | /* Good values for timeout and retries? Values below | |
340 | from scsi_ioctl_send_command() for default case... */ | |
341 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, | |
342 | sensebuf, (10*HZ), 5, 0); | |
343 | ||
344 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
345 | u8 *desc = sensebuf + 8; | |
346 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
347 | ||
348 | /* If we set cc then ATA pass-through will cause a | |
349 | * check condition even if no error. Filter that. */ | |
350 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
351 | struct scsi_sense_hdr sshdr; | |
352 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
353 | &sshdr); | |
354 | if (sshdr.sense_key==0 && | |
355 | sshdr.asc==0 && sshdr.ascq==0) | |
356 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; | |
357 | } | |
358 | ||
359 | /* Send userspace ATA registers */ | |
360 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
361 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
362 | args[0] = desc[13]; /* status */ | |
363 | args[1] = desc[3]; /* error */ | |
364 | args[2] = desc[5]; /* sector count (0:7) */ | |
365 | args[3] = desc[7]; /* lbal */ | |
366 | args[4] = desc[9]; /* lbam */ | |
367 | args[5] = desc[11]; /* lbah */ | |
368 | args[6] = desc[12]; /* select */ | |
369 | if (copy_to_user(arg, args, sizeof(args))) | |
370 | rc = -EFAULT; | |
371 | } | |
372 | } | |
373 | ||
374 | if (cmd_result) { | |
375 | rc = -EIO; | |
376 | goto error; | |
377 | } | |
378 | ||
379 | error: | |
380 | kfree(sensebuf); | |
381 | return rc; | |
382 | } | |
383 | ||
384 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
385 | { | |
386 | int val = -EINVAL, rc = -EINVAL; | |
387 | ||
388 | switch (cmd) { | |
389 | case ATA_IOC_GET_IO32: | |
390 | val = 0; | |
391 | if (copy_to_user(arg, &val, 1)) | |
392 | return -EFAULT; | |
393 | return 0; | |
394 | ||
395 | case ATA_IOC_SET_IO32: | |
396 | val = (unsigned long) arg; | |
397 | if (val != 0) | |
398 | return -EINVAL; | |
399 | return 0; | |
400 | ||
401 | case HDIO_GET_IDENTITY: | |
402 | return ata_get_identity(scsidev, arg); | |
403 | ||
404 | case HDIO_DRIVE_CMD: | |
405 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
406 | return -EACCES; | |
407 | return ata_cmd_ioctl(scsidev, arg); | |
408 | ||
409 | case HDIO_DRIVE_TASK: | |
410 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
411 | return -EACCES; | |
412 | return ata_task_ioctl(scsidev, arg); | |
413 | ||
414 | default: | |
415 | rc = -ENOTTY; | |
416 | break; | |
417 | } | |
418 | ||
419 | return rc; | |
420 | } | |
421 | ||
422 | /** | |
423 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
424 | * @dev: ATA device to which the new command is attached | |
425 | * @cmd: SCSI command that originated this ATA command | |
426 | * @done: SCSI command completion function | |
427 | * | |
428 | * Obtain a reference to an unused ata_queued_cmd structure, | |
429 | * which is the basic libata structure representing a single | |
430 | * ATA command sent to the hardware. | |
431 | * | |
432 | * If a command was available, fill in the SCSI-specific | |
433 | * portions of the structure with information on the | |
434 | * current command. | |
435 | * | |
436 | * LOCKING: | |
437 | * spin_lock_irqsave(host lock) | |
438 | * | |
439 | * RETURNS: | |
440 | * Command allocated, or %NULL if none available. | |
441 | */ | |
442 | static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, | |
443 | struct scsi_cmnd *cmd, | |
444 | void (*done)(struct scsi_cmnd *)) | |
445 | { | |
446 | struct ata_queued_cmd *qc; | |
447 | ||
448 | qc = ata_qc_new_init(dev); | |
449 | if (qc) { | |
450 | qc->scsicmd = cmd; | |
451 | qc->scsidone = done; | |
452 | ||
453 | if (cmd->use_sg) { | |
454 | qc->__sg = (struct scatterlist *) cmd->request_buffer; | |
455 | qc->n_elem = cmd->use_sg; | |
456 | } else if (cmd->request_bufflen) { | |
457 | qc->__sg = &qc->sgent; | |
458 | qc->n_elem = 1; | |
459 | } | |
460 | } else { | |
461 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
462 | done(cmd); | |
463 | } | |
464 | ||
465 | return qc; | |
466 | } | |
467 | ||
468 | /** | |
469 | * ata_dump_status - user friendly display of error info | |
470 | * @id: id of the port in question | |
471 | * @tf: ptr to filled out taskfile | |
472 | * | |
473 | * Decode and dump the ATA error/status registers for the user so | |
474 | * that they have some idea what really happened at the non | |
475 | * make-believe layer. | |
476 | * | |
477 | * LOCKING: | |
478 | * inherited from caller | |
479 | */ | |
480 | static void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
481 | { | |
482 | u8 stat = tf->command, err = tf->feature; | |
483 | ||
484 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
485 | if (stat & ATA_BUSY) { | |
486 | printk("Busy }\n"); /* Data is not valid in this case */ | |
487 | } else { | |
488 | if (stat & 0x40) printk("DriveReady "); | |
489 | if (stat & 0x20) printk("DeviceFault "); | |
490 | if (stat & 0x10) printk("SeekComplete "); | |
491 | if (stat & 0x08) printk("DataRequest "); | |
492 | if (stat & 0x04) printk("CorrectedError "); | |
493 | if (stat & 0x02) printk("Index "); | |
494 | if (stat & 0x01) printk("Error "); | |
495 | printk("}\n"); | |
496 | ||
497 | if (err) { | |
498 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
499 | if (err & 0x04) printk("DriveStatusError "); | |
500 | if (err & 0x80) { | |
501 | if (err & 0x04) printk("BadCRC "); | |
502 | else printk("Sector "); | |
503 | } | |
504 | if (err & 0x40) printk("UncorrectableError "); | |
505 | if (err & 0x10) printk("SectorIdNotFound "); | |
506 | if (err & 0x02) printk("TrackZeroNotFound "); | |
507 | if (err & 0x01) printk("AddrMarkNotFound "); | |
508 | printk("}\n"); | |
509 | } | |
510 | } | |
511 | } | |
512 | ||
513 | /** | |
514 | * ata_to_sense_error - convert ATA error to SCSI error | |
515 | * @id: ATA device number | |
516 | * @drv_stat: value contained in ATA status register | |
517 | * @drv_err: value contained in ATA error register | |
518 | * @sk: the sense key we'll fill out | |
519 | * @asc: the additional sense code we'll fill out | |
520 | * @ascq: the additional sense code qualifier we'll fill out | |
521 | * @verbose: be verbose | |
522 | * | |
523 | * Converts an ATA error into a SCSI error. Fill out pointers to | |
524 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
525 | * format sense blocks. | |
526 | * | |
527 | * LOCKING: | |
528 | * spin_lock_irqsave(host lock) | |
529 | */ | |
530 | static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, | |
531 | u8 *asc, u8 *ascq, int verbose) | |
532 | { | |
533 | int i; | |
534 | ||
535 | /* Based on the 3ware driver translation table */ | |
536 | static const unsigned char sense_table[][4] = { | |
537 | /* BBD|ECC|ID|MAR */ | |
538 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
539 | /* BBD|ECC|ID */ | |
540 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
541 | /* ECC|MC|MARK */ | |
542 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
543 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
544 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
545 | /* MC|ID|ABRT|TRK0|MARK */ | |
546 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
547 | /* MCR|MARK */ | |
548 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
549 | /* Bad address mark */ | |
550 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
551 | /* TRK0 */ | |
552 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
553 | /* Abort & !ICRC */ | |
554 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
555 | /* Media change request */ | |
556 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
557 | /* SRV */ | |
558 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
559 | /* Media change */ | |
560 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
561 | /* ECC */ | |
562 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
563 | /* BBD - block marked bad */ | |
564 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
565 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
566 | }; | |
567 | static const unsigned char stat_table[][4] = { | |
568 | /* Must be first because BUSY means no other bits valid */ | |
569 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
570 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
571 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
572 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
573 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
574 | }; | |
575 | ||
576 | /* | |
577 | * Is this an error we can process/parse | |
578 | */ | |
579 | if (drv_stat & ATA_BUSY) { | |
580 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
581 | } | |
582 | ||
583 | if (drv_err) { | |
584 | /* Look for drv_err */ | |
585 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
586 | /* Look for best matches first */ | |
587 | if ((sense_table[i][0] & drv_err) == | |
588 | sense_table[i][0]) { | |
589 | *sk = sense_table[i][1]; | |
590 | *asc = sense_table[i][2]; | |
591 | *ascq = sense_table[i][3]; | |
592 | goto translate_done; | |
593 | } | |
594 | } | |
595 | /* No immediate match */ | |
596 | if (verbose) | |
597 | printk(KERN_WARNING "ata%u: no sense translation for " | |
598 | "error 0x%02x\n", id, drv_err); | |
599 | } | |
600 | ||
601 | /* Fall back to interpreting status bits */ | |
602 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
603 | if (stat_table[i][0] & drv_stat) { | |
604 | *sk = stat_table[i][1]; | |
605 | *asc = stat_table[i][2]; | |
606 | *ascq = stat_table[i][3]; | |
607 | goto translate_done; | |
608 | } | |
609 | } | |
610 | /* No error? Undecoded? */ | |
611 | if (verbose) | |
612 | printk(KERN_WARNING "ata%u: no sense translation for " | |
613 | "status: 0x%02x\n", id, drv_stat); | |
614 | ||
615 | /* We need a sensible error return here, which is tricky, and one | |
616 | that won't cause people to do things like return a disk wrongly */ | |
617 | *sk = ABORTED_COMMAND; | |
618 | *asc = 0x00; | |
619 | *ascq = 0x00; | |
620 | ||
621 | translate_done: | |
622 | if (verbose) | |
623 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
624 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
625 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
626 | return; | |
627 | } | |
628 | ||
629 | /* | |
630 | * ata_gen_passthru_sense - Generate check condition sense block. | |
631 | * @qc: Command that completed. | |
632 | * | |
633 | * This function is specific to the ATA descriptor format sense | |
634 | * block specified for the ATA pass through commands. Regardless | |
635 | * of whether the command errored or not, return a sense | |
636 | * block. Copy all controller registers into the sense | |
637 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
638 | * | |
639 | * LOCKING: | |
640 | * None. | |
641 | */ | |
642 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) | |
643 | { | |
644 | struct scsi_cmnd *cmd = qc->scsicmd; | |
645 | struct ata_taskfile *tf = &qc->result_tf; | |
646 | unsigned char *sb = cmd->sense_buffer; | |
647 | unsigned char *desc = sb + 8; | |
648 | int verbose = qc->ap->ops->error_handler == NULL; | |
649 | ||
650 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
651 | ||
652 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
653 | ||
654 | /* | |
655 | * Use ata_to_sense_error() to map status register bits | |
656 | * onto sense key, asc & ascq. | |
657 | */ | |
658 | if (qc->err_mask || | |
659 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
660 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, | |
661 | &sb[1], &sb[2], &sb[3], verbose); | |
662 | sb[1] &= 0x0f; | |
663 | } | |
664 | ||
665 | /* | |
666 | * Sense data is current and format is descriptor. | |
667 | */ | |
668 | sb[0] = 0x72; | |
669 | ||
670 | desc[0] = 0x09; | |
671 | ||
672 | /* set length of additional sense data */ | |
673 | sb[7] = 14; | |
674 | desc[1] = 12; | |
675 | ||
676 | /* | |
677 | * Copy registers into sense buffer. | |
678 | */ | |
679 | desc[2] = 0x00; | |
680 | desc[3] = tf->feature; /* == error reg */ | |
681 | desc[5] = tf->nsect; | |
682 | desc[7] = tf->lbal; | |
683 | desc[9] = tf->lbam; | |
684 | desc[11] = tf->lbah; | |
685 | desc[12] = tf->device; | |
686 | desc[13] = tf->command; /* == status reg */ | |
687 | ||
688 | /* | |
689 | * Fill in Extend bit, and the high order bytes | |
690 | * if applicable. | |
691 | */ | |
692 | if (tf->flags & ATA_TFLAG_LBA48) { | |
693 | desc[2] |= 0x01; | |
694 | desc[4] = tf->hob_nsect; | |
695 | desc[6] = tf->hob_lbal; | |
696 | desc[8] = tf->hob_lbam; | |
697 | desc[10] = tf->hob_lbah; | |
698 | } | |
699 | } | |
700 | ||
701 | /** | |
702 | * ata_gen_ata_sense - generate a SCSI fixed sense block | |
703 | * @qc: Command that we are erroring out | |
704 | * | |
705 | * Generate sense block for a failed ATA command @qc. Descriptor | |
706 | * format is used to accomodate LBA48 block address. | |
707 | * | |
708 | * LOCKING: | |
709 | * None. | |
710 | */ | |
711 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) | |
712 | { | |
713 | struct ata_device *dev = qc->dev; | |
714 | struct scsi_cmnd *cmd = qc->scsicmd; | |
715 | struct ata_taskfile *tf = &qc->result_tf; | |
716 | unsigned char *sb = cmd->sense_buffer; | |
717 | unsigned char *desc = sb + 8; | |
718 | int verbose = qc->ap->ops->error_handler == NULL; | |
719 | u64 block; | |
720 | ||
721 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
722 | ||
723 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
724 | ||
725 | /* sense data is current and format is descriptor */ | |
726 | sb[0] = 0x72; | |
727 | ||
728 | /* Use ata_to_sense_error() to map status register bits | |
729 | * onto sense key, asc & ascq. | |
730 | */ | |
731 | if (qc->err_mask || | |
732 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
733 | ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, | |
734 | &sb[1], &sb[2], &sb[3], verbose); | |
735 | sb[1] &= 0x0f; | |
736 | } | |
737 | ||
738 | block = ata_tf_read_block(&qc->result_tf, dev); | |
739 | ||
740 | /* information sense data descriptor */ | |
741 | sb[7] = 12; | |
742 | desc[0] = 0x00; | |
743 | desc[1] = 10; | |
744 | ||
745 | desc[2] |= 0x80; /* valid */ | |
746 | desc[6] = block >> 40; | |
747 | desc[7] = block >> 32; | |
748 | desc[8] = block >> 24; | |
749 | desc[9] = block >> 16; | |
750 | desc[10] = block >> 8; | |
751 | desc[11] = block; | |
752 | } | |
753 | ||
754 | static void ata_scsi_sdev_config(struct scsi_device *sdev) | |
755 | { | |
756 | sdev->use_10_for_rw = 1; | |
757 | sdev->use_10_for_ms = 1; | |
758 | } | |
759 | ||
760 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
761 | struct ata_device *dev) | |
762 | { | |
763 | /* configure max sectors */ | |
764 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
765 | ||
766 | /* SATA DMA transfers must be multiples of 4 byte, so | |
767 | * we need to pad ATAPI transfers using an extra sg. | |
768 | * Decrement max hw segments accordingly. | |
769 | */ | |
770 | if (dev->class == ATA_DEV_ATAPI) { | |
771 | request_queue_t *q = sdev->request_queue; | |
772 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); | |
773 | } | |
774 | ||
775 | if (dev->flags & ATA_DFLAG_NCQ) { | |
776 | int depth; | |
777 | ||
778 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
779 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
780 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
781 | } | |
782 | } | |
783 | ||
784 | /** | |
785 | * ata_scsi_slave_config - Set SCSI device attributes | |
786 | * @sdev: SCSI device to examine | |
787 | * | |
788 | * This is called before we actually start reading | |
789 | * and writing to the device, to configure certain | |
790 | * SCSI mid-layer behaviors. | |
791 | * | |
792 | * LOCKING: | |
793 | * Defined by SCSI layer. We don't really care. | |
794 | */ | |
795 | ||
796 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
797 | { | |
798 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
799 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
800 | ||
801 | ata_scsi_sdev_config(sdev); | |
802 | ||
803 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
804 | ||
805 | sdev->manage_start_stop = 1; | |
806 | ||
807 | if (dev) | |
808 | ata_scsi_dev_config(sdev, dev); | |
809 | ||
810 | return 0; /* scsi layer doesn't check return value, sigh */ | |
811 | } | |
812 | ||
813 | /** | |
814 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
815 | * @sdev: SCSI device to be destroyed | |
816 | * | |
817 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
818 | * this unplugging was initiated by libata as indicated by NULL | |
819 | * dev->sdev, this function doesn't have to do anything. | |
820 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
821 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
822 | * EH. | |
823 | * | |
824 | * LOCKING: | |
825 | * Defined by SCSI layer. We don't really care. | |
826 | */ | |
827 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
828 | { | |
829 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
830 | unsigned long flags; | |
831 | struct ata_device *dev; | |
832 | ||
833 | if (!ap->ops->error_handler) | |
834 | return; | |
835 | ||
836 | spin_lock_irqsave(ap->lock, flags); | |
837 | dev = __ata_scsi_find_dev(ap, sdev); | |
838 | if (dev && dev->sdev) { | |
839 | /* SCSI device already in CANCEL state, no need to offline it */ | |
840 | dev->sdev = NULL; | |
841 | dev->flags |= ATA_DFLAG_DETACH; | |
842 | ata_port_schedule_eh(ap); | |
843 | } | |
844 | spin_unlock_irqrestore(ap->lock, flags); | |
845 | } | |
846 | ||
847 | /** | |
848 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
849 | * @sdev: SCSI device to configure queue depth for | |
850 | * @queue_depth: new queue depth | |
851 | * | |
852 | * This is libata standard hostt->change_queue_depth callback. | |
853 | * SCSI will call into this callback when user tries to set queue | |
854 | * depth via sysfs. | |
855 | * | |
856 | * LOCKING: | |
857 | * SCSI layer (we don't care) | |
858 | * | |
859 | * RETURNS: | |
860 | * Newly configured queue depth. | |
861 | */ | |
862 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
863 | { | |
864 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
865 | struct ata_device *dev; | |
866 | unsigned long flags; | |
867 | ||
868 | if (queue_depth < 1 || queue_depth == sdev->queue_depth) | |
869 | return sdev->queue_depth; | |
870 | ||
871 | dev = ata_scsi_find_dev(ap, sdev); | |
872 | if (!dev || !ata_dev_enabled(dev)) | |
873 | return sdev->queue_depth; | |
874 | ||
875 | /* NCQ enabled? */ | |
876 | spin_lock_irqsave(ap->lock, flags); | |
877 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; | |
878 | if (queue_depth == 1 || !ata_ncq_enabled(dev)) { | |
879 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
880 | queue_depth = 1; | |
881 | } | |
882 | spin_unlock_irqrestore(ap->lock, flags); | |
883 | ||
884 | /* limit and apply queue depth */ | |
885 | queue_depth = min(queue_depth, sdev->host->can_queue); | |
886 | queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); | |
887 | queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); | |
888 | ||
889 | if (sdev->queue_depth == queue_depth) | |
890 | return -EINVAL; | |
891 | ||
892 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
893 | return queue_depth; | |
894 | } | |
895 | ||
896 | /* XXX: for spindown warning */ | |
897 | static void ata_delayed_done_timerfn(unsigned long arg) | |
898 | { | |
899 | struct scsi_cmnd *scmd = (void *)arg; | |
900 | ||
901 | scmd->scsi_done(scmd); | |
902 | } | |
903 | ||
904 | /* XXX: for spindown warning */ | |
905 | static void ata_delayed_done(struct scsi_cmnd *scmd) | |
906 | { | |
907 | static struct timer_list timer; | |
908 | ||
909 | setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd); | |
910 | mod_timer(&timer, jiffies + 5 * HZ); | |
911 | } | |
912 | ||
913 | /** | |
914 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
915 | * @qc: Storage for translated ATA taskfile | |
916 | * | |
917 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
918 | * (to start). Perhaps these commands should be preceded by | |
919 | * CHECK POWER MODE to see what power mode the device is already in. | |
920 | * [See SAT revision 5 at www.t10.org] | |
921 | * | |
922 | * LOCKING: | |
923 | * spin_lock_irqsave(host lock) | |
924 | * | |
925 | * RETURNS: | |
926 | * Zero on success, non-zero on error. | |
927 | */ | |
928 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) | |
929 | { | |
930 | struct scsi_cmnd *scmd = qc->scsicmd; | |
931 | struct ata_taskfile *tf = &qc->tf; | |
932 | const u8 *cdb = scmd->cmnd; | |
933 | ||
934 | if (scmd->cmd_len < 5) | |
935 | goto invalid_fld; | |
936 | ||
937 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
938 | tf->protocol = ATA_PROT_NODATA; | |
939 | if (cdb[1] & 0x1) { | |
940 | ; /* ignore IMMED bit, violates sat-r05 */ | |
941 | } | |
942 | if (cdb[4] & 0x2) | |
943 | goto invalid_fld; /* LOEJ bit set not supported */ | |
944 | if (((cdb[4] >> 4) & 0xf) != 0) | |
945 | goto invalid_fld; /* power conditions not supported */ | |
946 | if (cdb[4] & 0x1) { | |
947 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
948 | ||
949 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
950 | tf->flags |= ATA_TFLAG_LBA; | |
951 | ||
952 | tf->lbah = 0x0; | |
953 | tf->lbam = 0x0; | |
954 | tf->lbal = 0x0; | |
955 | tf->device |= ATA_LBA; | |
956 | } else { | |
957 | /* CHS */ | |
958 | tf->lbal = 0x1; /* sect */ | |
959 | tf->lbam = 0x0; /* cyl low */ | |
960 | tf->lbah = 0x0; /* cyl high */ | |
961 | } | |
962 | ||
963 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ | |
964 | } else { | |
965 | /* XXX: This is for backward compatibility, will be | |
966 | * removed. Read Documentation/feature-removal-schedule.txt | |
967 | * for more info. | |
968 | */ | |
969 | if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) && | |
970 | (system_state == SYSTEM_HALT || | |
971 | system_state == SYSTEM_POWER_OFF)) { | |
972 | static unsigned long warned = 0; | |
973 | ||
974 | if (!test_and_set_bit(0, &warned)) { | |
975 | ata_dev_printk(qc->dev, KERN_WARNING, | |
976 | "DISK MIGHT NOT BE SPUN DOWN PROPERLY. " | |
977 | "UPDATE SHUTDOWN UTILITY\n"); | |
978 | ata_dev_printk(qc->dev, KERN_WARNING, | |
979 | "For more info, visit " | |
980 | "http://linux-ata.org/shutdown.html\n"); | |
981 | ||
982 | /* ->scsi_done is not used, use it for | |
983 | * delayed completion. | |
984 | */ | |
985 | scmd->scsi_done = qc->scsidone; | |
986 | qc->scsidone = ata_delayed_done; | |
987 | } | |
988 | scmd->result = SAM_STAT_GOOD; | |
989 | return 1; | |
990 | } | |
991 | ||
992 | /* Issue ATA STANDBY IMMEDIATE command */ | |
993 | tf->command = ATA_CMD_STANDBYNOW1; | |
994 | } | |
995 | ||
996 | /* | |
997 | * Standby and Idle condition timers could be implemented but that | |
998 | * would require libata to implement the Power condition mode page | |
999 | * and allow the user to change it. Changing mode pages requires | |
1000 | * MODE SELECT to be implemented. | |
1001 | */ | |
1002 | ||
1003 | return 0; | |
1004 | ||
1005 | invalid_fld: | |
1006 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1007 | /* "Invalid field in cbd" */ | |
1008 | return 1; | |
1009 | } | |
1010 | ||
1011 | ||
1012 | /** | |
1013 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1014 | * @qc: Storage for translated ATA taskfile | |
1015 | * | |
1016 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1017 | * FLUSH CACHE EXT. | |
1018 | * | |
1019 | * LOCKING: | |
1020 | * spin_lock_irqsave(host lock) | |
1021 | * | |
1022 | * RETURNS: | |
1023 | * Zero on success, non-zero on error. | |
1024 | */ | |
1025 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) | |
1026 | { | |
1027 | struct ata_taskfile *tf = &qc->tf; | |
1028 | ||
1029 | tf->flags |= ATA_TFLAG_DEVICE; | |
1030 | tf->protocol = ATA_PROT_NODATA; | |
1031 | ||
1032 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) | |
1033 | tf->command = ATA_CMD_FLUSH_EXT; | |
1034 | else | |
1035 | tf->command = ATA_CMD_FLUSH; | |
1036 | ||
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | /** | |
1041 | * scsi_6_lba_len - Get LBA and transfer length | |
1042 | * @cdb: SCSI command to translate | |
1043 | * | |
1044 | * Calculate LBA and transfer length for 6-byte commands. | |
1045 | * | |
1046 | * RETURNS: | |
1047 | * @plba: the LBA | |
1048 | * @plen: the transfer length | |
1049 | */ | |
1050 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) | |
1051 | { | |
1052 | u64 lba = 0; | |
1053 | u32 len = 0; | |
1054 | ||
1055 | VPRINTK("six-byte command\n"); | |
1056 | ||
1057 | lba |= ((u64)cdb[2]) << 8; | |
1058 | lba |= ((u64)cdb[3]); | |
1059 | ||
1060 | len |= ((u32)cdb[4]); | |
1061 | ||
1062 | *plba = lba; | |
1063 | *plen = len; | |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * scsi_10_lba_len - Get LBA and transfer length | |
1068 | * @cdb: SCSI command to translate | |
1069 | * | |
1070 | * Calculate LBA and transfer length for 10-byte commands. | |
1071 | * | |
1072 | * RETURNS: | |
1073 | * @plba: the LBA | |
1074 | * @plen: the transfer length | |
1075 | */ | |
1076 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) | |
1077 | { | |
1078 | u64 lba = 0; | |
1079 | u32 len = 0; | |
1080 | ||
1081 | VPRINTK("ten-byte command\n"); | |
1082 | ||
1083 | lba |= ((u64)cdb[2]) << 24; | |
1084 | lba |= ((u64)cdb[3]) << 16; | |
1085 | lba |= ((u64)cdb[4]) << 8; | |
1086 | lba |= ((u64)cdb[5]); | |
1087 | ||
1088 | len |= ((u32)cdb[7]) << 8; | |
1089 | len |= ((u32)cdb[8]); | |
1090 | ||
1091 | *plba = lba; | |
1092 | *plen = len; | |
1093 | } | |
1094 | ||
1095 | /** | |
1096 | * scsi_16_lba_len - Get LBA and transfer length | |
1097 | * @cdb: SCSI command to translate | |
1098 | * | |
1099 | * Calculate LBA and transfer length for 16-byte commands. | |
1100 | * | |
1101 | * RETURNS: | |
1102 | * @plba: the LBA | |
1103 | * @plen: the transfer length | |
1104 | */ | |
1105 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) | |
1106 | { | |
1107 | u64 lba = 0; | |
1108 | u32 len = 0; | |
1109 | ||
1110 | VPRINTK("sixteen-byte command\n"); | |
1111 | ||
1112 | lba |= ((u64)cdb[2]) << 56; | |
1113 | lba |= ((u64)cdb[3]) << 48; | |
1114 | lba |= ((u64)cdb[4]) << 40; | |
1115 | lba |= ((u64)cdb[5]) << 32; | |
1116 | lba |= ((u64)cdb[6]) << 24; | |
1117 | lba |= ((u64)cdb[7]) << 16; | |
1118 | lba |= ((u64)cdb[8]) << 8; | |
1119 | lba |= ((u64)cdb[9]); | |
1120 | ||
1121 | len |= ((u32)cdb[10]) << 24; | |
1122 | len |= ((u32)cdb[11]) << 16; | |
1123 | len |= ((u32)cdb[12]) << 8; | |
1124 | len |= ((u32)cdb[13]); | |
1125 | ||
1126 | *plba = lba; | |
1127 | *plen = len; | |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1132 | * @qc: Storage for translated ATA taskfile | |
1133 | * | |
1134 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1135 | * | |
1136 | * LOCKING: | |
1137 | * spin_lock_irqsave(host lock) | |
1138 | * | |
1139 | * RETURNS: | |
1140 | * Zero on success, non-zero on error. | |
1141 | */ | |
1142 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) | |
1143 | { | |
1144 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1145 | struct ata_taskfile *tf = &qc->tf; | |
1146 | struct ata_device *dev = qc->dev; | |
1147 | u64 dev_sectors = qc->dev->n_sectors; | |
1148 | const u8 *cdb = scmd->cmnd; | |
1149 | u64 block; | |
1150 | u32 n_block; | |
1151 | ||
1152 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1153 | tf->protocol = ATA_PROT_NODATA; | |
1154 | ||
1155 | if (cdb[0] == VERIFY) { | |
1156 | if (scmd->cmd_len < 10) | |
1157 | goto invalid_fld; | |
1158 | scsi_10_lba_len(cdb, &block, &n_block); | |
1159 | } else if (cdb[0] == VERIFY_16) { | |
1160 | if (scmd->cmd_len < 16) | |
1161 | goto invalid_fld; | |
1162 | scsi_16_lba_len(cdb, &block, &n_block); | |
1163 | } else | |
1164 | goto invalid_fld; | |
1165 | ||
1166 | if (!n_block) | |
1167 | goto nothing_to_do; | |
1168 | if (block >= dev_sectors) | |
1169 | goto out_of_range; | |
1170 | if ((block + n_block) > dev_sectors) | |
1171 | goto out_of_range; | |
1172 | ||
1173 | if (dev->flags & ATA_DFLAG_LBA) { | |
1174 | tf->flags |= ATA_TFLAG_LBA; | |
1175 | ||
1176 | if (lba_28_ok(block, n_block)) { | |
1177 | /* use LBA28 */ | |
1178 | tf->command = ATA_CMD_VERIFY; | |
1179 | tf->device |= (block >> 24) & 0xf; | |
1180 | } else if (lba_48_ok(block, n_block)) { | |
1181 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1182 | goto out_of_range; | |
1183 | ||
1184 | /* use LBA48 */ | |
1185 | tf->flags |= ATA_TFLAG_LBA48; | |
1186 | tf->command = ATA_CMD_VERIFY_EXT; | |
1187 | ||
1188 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
1189 | ||
1190 | tf->hob_lbah = (block >> 40) & 0xff; | |
1191 | tf->hob_lbam = (block >> 32) & 0xff; | |
1192 | tf->hob_lbal = (block >> 24) & 0xff; | |
1193 | } else | |
1194 | /* request too large even for LBA48 */ | |
1195 | goto out_of_range; | |
1196 | ||
1197 | tf->nsect = n_block & 0xff; | |
1198 | ||
1199 | tf->lbah = (block >> 16) & 0xff; | |
1200 | tf->lbam = (block >> 8) & 0xff; | |
1201 | tf->lbal = block & 0xff; | |
1202 | ||
1203 | tf->device |= ATA_LBA; | |
1204 | } else { | |
1205 | /* CHS */ | |
1206 | u32 sect, head, cyl, track; | |
1207 | ||
1208 | if (!lba_28_ok(block, n_block)) | |
1209 | goto out_of_range; | |
1210 | ||
1211 | /* Convert LBA to CHS */ | |
1212 | track = (u32)block / dev->sectors; | |
1213 | cyl = track / dev->heads; | |
1214 | head = track % dev->heads; | |
1215 | sect = (u32)block % dev->sectors + 1; | |
1216 | ||
1217 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
1218 | (u32)block, track, cyl, head, sect); | |
1219 | ||
1220 | /* Check whether the converted CHS can fit. | |
1221 | Cylinder: 0-65535 | |
1222 | Head: 0-15 | |
1223 | Sector: 1-255*/ | |
1224 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
1225 | goto out_of_range; | |
1226 | ||
1227 | tf->command = ATA_CMD_VERIFY; | |
1228 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1229 | tf->lbal = sect; | |
1230 | tf->lbam = cyl; | |
1231 | tf->lbah = cyl >> 8; | |
1232 | tf->device |= head; | |
1233 | } | |
1234 | ||
1235 | return 0; | |
1236 | ||
1237 | invalid_fld: | |
1238 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1239 | /* "Invalid field in cbd" */ | |
1240 | return 1; | |
1241 | ||
1242 | out_of_range: | |
1243 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1244 | /* "Logical Block Address out of range" */ | |
1245 | return 1; | |
1246 | ||
1247 | nothing_to_do: | |
1248 | scmd->result = SAM_STAT_GOOD; | |
1249 | return 1; | |
1250 | } | |
1251 | ||
1252 | /** | |
1253 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1254 | * @qc: Storage for translated ATA taskfile | |
1255 | * | |
1256 | * Converts any of six SCSI read/write commands into the | |
1257 | * ATA counterpart, including starting sector (LBA), | |
1258 | * sector count, and taking into account the device's LBA48 | |
1259 | * support. | |
1260 | * | |
1261 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1262 | * %WRITE_16 are currently supported. | |
1263 | * | |
1264 | * LOCKING: | |
1265 | * spin_lock_irqsave(host lock) | |
1266 | * | |
1267 | * RETURNS: | |
1268 | * Zero on success, non-zero on error. | |
1269 | */ | |
1270 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) | |
1271 | { | |
1272 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1273 | const u8 *cdb = scmd->cmnd; | |
1274 | unsigned int tf_flags = 0; | |
1275 | u64 block; | |
1276 | u32 n_block; | |
1277 | int rc; | |
1278 | ||
1279 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) | |
1280 | tf_flags |= ATA_TFLAG_WRITE; | |
1281 | ||
1282 | /* Calculate the SCSI LBA, transfer length and FUA. */ | |
1283 | switch (cdb[0]) { | |
1284 | case READ_10: | |
1285 | case WRITE_10: | |
1286 | if (unlikely(scmd->cmd_len < 10)) | |
1287 | goto invalid_fld; | |
1288 | scsi_10_lba_len(cdb, &block, &n_block); | |
1289 | if (unlikely(cdb[1] & (1 << 3))) | |
1290 | tf_flags |= ATA_TFLAG_FUA; | |
1291 | break; | |
1292 | case READ_6: | |
1293 | case WRITE_6: | |
1294 | if (unlikely(scmd->cmd_len < 6)) | |
1295 | goto invalid_fld; | |
1296 | scsi_6_lba_len(cdb, &block, &n_block); | |
1297 | ||
1298 | /* for 6-byte r/w commands, transfer length 0 | |
1299 | * means 256 blocks of data, not 0 block. | |
1300 | */ | |
1301 | if (!n_block) | |
1302 | n_block = 256; | |
1303 | break; | |
1304 | case READ_16: | |
1305 | case WRITE_16: | |
1306 | if (unlikely(scmd->cmd_len < 16)) | |
1307 | goto invalid_fld; | |
1308 | scsi_16_lba_len(cdb, &block, &n_block); | |
1309 | if (unlikely(cdb[1] & (1 << 3))) | |
1310 | tf_flags |= ATA_TFLAG_FUA; | |
1311 | break; | |
1312 | default: | |
1313 | DPRINTK("no-byte command\n"); | |
1314 | goto invalid_fld; | |
1315 | } | |
1316 | ||
1317 | /* Check and compose ATA command */ | |
1318 | if (!n_block) | |
1319 | /* For 10-byte and 16-byte SCSI R/W commands, transfer | |
1320 | * length 0 means transfer 0 block of data. | |
1321 | * However, for ATA R/W commands, sector count 0 means | |
1322 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
1323 | * | |
1324 | * WARNING: one or two older ATA drives treat 0 as 0... | |
1325 | */ | |
1326 | goto nothing_to_do; | |
1327 | ||
1328 | qc->flags |= ATA_QCFLAG_IO; | |
1329 | qc->nbytes = n_block * ATA_SECT_SIZE; | |
1330 | ||
1331 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, | |
1332 | qc->tag); | |
1333 | if (likely(rc == 0)) | |
1334 | return 0; | |
1335 | ||
1336 | if (rc == -ERANGE) | |
1337 | goto out_of_range; | |
1338 | /* treat all other errors as -EINVAL, fall through */ | |
1339 | invalid_fld: | |
1340 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1341 | /* "Invalid field in cbd" */ | |
1342 | return 1; | |
1343 | ||
1344 | out_of_range: | |
1345 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1346 | /* "Logical Block Address out of range" */ | |
1347 | return 1; | |
1348 | ||
1349 | nothing_to_do: | |
1350 | scmd->result = SAM_STAT_GOOD; | |
1351 | return 1; | |
1352 | } | |
1353 | ||
1354 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) | |
1355 | { | |
1356 | struct ata_port *ap = qc->ap; | |
1357 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1358 | u8 *cdb = cmd->cmnd; | |
1359 | int need_sense = (qc->err_mask != 0); | |
1360 | ||
1361 | /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and | |
1362 | * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE | |
1363 | * cache | |
1364 | */ | |
1365 | if (ap->ops->error_handler && | |
1366 | !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) && | |
1367 | ((qc->tf.feature == SETFEATURES_WC_ON) || | |
1368 | (qc->tf.feature == SETFEATURES_WC_OFF))) { | |
1369 | ap->eh_info.action |= ATA_EH_REVALIDATE; | |
1370 | ata_port_schedule_eh(ap); | |
1371 | } | |
1372 | ||
1373 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1374 | * user mandated it or if there's an error. Note that if we | |
1375 | * generate because the user forced us to, a check condition | |
1376 | * is generated and the ATA register values are returned | |
1377 | * whether the command completed successfully or not. If there | |
1378 | * was no error, SK, ASC and ASCQ will all be zero. | |
1379 | */ | |
1380 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && | |
1381 | ((cdb[2] & 0x20) || need_sense)) { | |
1382 | ata_gen_passthru_sense(qc); | |
1383 | } else { | |
1384 | if (!need_sense) { | |
1385 | cmd->result = SAM_STAT_GOOD; | |
1386 | } else { | |
1387 | /* TODO: decide which descriptor format to use | |
1388 | * for 48b LBA devices and call that here | |
1389 | * instead of the fixed desc, which is only | |
1390 | * good for smaller LBA (and maybe CHS?) | |
1391 | * devices. | |
1392 | */ | |
1393 | ata_gen_ata_sense(qc); | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | /* XXX: track spindown state for spindown skipping and warning */ | |
1398 | if (unlikely(qc->tf.command == ATA_CMD_STANDBY || | |
1399 | qc->tf.command == ATA_CMD_STANDBYNOW1)) | |
1400 | qc->dev->flags |= ATA_DFLAG_SPUNDOWN; | |
1401 | else if (likely(system_state != SYSTEM_HALT && | |
1402 | system_state != SYSTEM_POWER_OFF)) | |
1403 | qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN; | |
1404 | ||
1405 | if (need_sense && !ap->ops->error_handler) | |
1406 | ata_dump_status(ap->print_id, &qc->result_tf); | |
1407 | ||
1408 | qc->scsidone(cmd); | |
1409 | ||
1410 | ata_qc_free(qc); | |
1411 | } | |
1412 | ||
1413 | /** | |
1414 | * ata_scmd_need_defer - Check whether we need to defer scmd | |
1415 | * @dev: ATA device to which the command is addressed | |
1416 | * @is_io: Is the command IO (and thus possibly NCQ)? | |
1417 | * | |
1418 | * NCQ and non-NCQ commands cannot run together. As upper layer | |
1419 | * only knows the queue depth, we are responsible for maintaining | |
1420 | * exclusion. This function checks whether a new command can be | |
1421 | * issued to @dev. | |
1422 | * | |
1423 | * LOCKING: | |
1424 | * spin_lock_irqsave(host lock) | |
1425 | * | |
1426 | * RETURNS: | |
1427 | * 1 if deferring is needed, 0 otherwise. | |
1428 | */ | |
1429 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) | |
1430 | { | |
1431 | struct ata_port *ap = dev->ap; | |
1432 | int is_ncq = is_io && ata_ncq_enabled(dev); | |
1433 | ||
1434 | if (is_ncq) { | |
1435 | if (!ata_tag_valid(ap->active_tag)) | |
1436 | return 0; | |
1437 | } else { | |
1438 | if (!ata_tag_valid(ap->active_tag) && !ap->sactive) | |
1439 | return 0; | |
1440 | } | |
1441 | return 1; | |
1442 | } | |
1443 | ||
1444 | /** | |
1445 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1446 | * @dev: ATA device to which the command is addressed | |
1447 | * @cmd: SCSI command to execute | |
1448 | * @done: SCSI command completion function | |
1449 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1450 | * | |
1451 | * Our ->queuecommand() function has decided that the SCSI | |
1452 | * command issued can be directly translated into an ATA | |
1453 | * command, rather than handled internally. | |
1454 | * | |
1455 | * This function sets up an ata_queued_cmd structure for the | |
1456 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1457 | * | |
1458 | * The xlat_func argument (actor) returns 0 if ready to execute | |
1459 | * ATA command, else 1 to finish translation. If 1 is returned | |
1460 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1461 | * to be set reflecting an error condition or clean (early) | |
1462 | * termination. | |
1463 | * | |
1464 | * LOCKING: | |
1465 | * spin_lock_irqsave(host lock) | |
1466 | * | |
1467 | * RETURNS: | |
1468 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1469 | * needs to be deferred. | |
1470 | */ | |
1471 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, | |
1472 | void (*done)(struct scsi_cmnd *), | |
1473 | ata_xlat_func_t xlat_func) | |
1474 | { | |
1475 | struct ata_queued_cmd *qc; | |
1476 | int is_io = xlat_func == ata_scsi_rw_xlat; | |
1477 | ||
1478 | VPRINTK("ENTER\n"); | |
1479 | ||
1480 | if (unlikely(ata_scmd_need_defer(dev, is_io))) | |
1481 | goto defer; | |
1482 | ||
1483 | qc = ata_scsi_qc_new(dev, cmd, done); | |
1484 | if (!qc) | |
1485 | goto err_mem; | |
1486 | ||
1487 | /* data is present; dma-map it */ | |
1488 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || | |
1489 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1490 | if (unlikely(cmd->request_bufflen < 1)) { | |
1491 | ata_dev_printk(dev, KERN_WARNING, | |
1492 | "WARNING: zero len r/w req\n"); | |
1493 | goto err_did; | |
1494 | } | |
1495 | ||
1496 | if (cmd->use_sg) | |
1497 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1498 | else | |
1499 | ata_sg_init_one(qc, cmd->request_buffer, | |
1500 | cmd->request_bufflen); | |
1501 | ||
1502 | qc->dma_dir = cmd->sc_data_direction; | |
1503 | } | |
1504 | ||
1505 | qc->complete_fn = ata_scsi_qc_complete; | |
1506 | ||
1507 | if (xlat_func(qc)) | |
1508 | goto early_finish; | |
1509 | ||
1510 | /* select device, send command to hardware */ | |
1511 | ata_qc_issue(qc); | |
1512 | ||
1513 | VPRINTK("EXIT\n"); | |
1514 | return 0; | |
1515 | ||
1516 | early_finish: | |
1517 | ata_qc_free(qc); | |
1518 | qc->scsidone(cmd); | |
1519 | DPRINTK("EXIT - early finish (good or error)\n"); | |
1520 | return 0; | |
1521 | ||
1522 | err_did: | |
1523 | ata_qc_free(qc); | |
1524 | cmd->result = (DID_ERROR << 16); | |
1525 | qc->scsidone(cmd); | |
1526 | err_mem: | |
1527 | DPRINTK("EXIT - internal\n"); | |
1528 | return 0; | |
1529 | ||
1530 | defer: | |
1531 | DPRINTK("EXIT - defer\n"); | |
1532 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1533 | } | |
1534 | ||
1535 | /** | |
1536 | * ata_scsi_rbuf_get - Map response buffer. | |
1537 | * @cmd: SCSI command containing buffer to be mapped. | |
1538 | * @buf_out: Pointer to mapped area. | |
1539 | * | |
1540 | * Maps buffer contained within SCSI command @cmd. | |
1541 | * | |
1542 | * LOCKING: | |
1543 | * spin_lock_irqsave(host lock) | |
1544 | * | |
1545 | * RETURNS: | |
1546 | * Length of response buffer. | |
1547 | */ | |
1548 | ||
1549 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1550 | { | |
1551 | u8 *buf; | |
1552 | unsigned int buflen; | |
1553 | ||
1554 | if (cmd->use_sg) { | |
1555 | struct scatterlist *sg; | |
1556 | ||
1557 | sg = (struct scatterlist *) cmd->request_buffer; | |
1558 | buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; | |
1559 | buflen = sg->length; | |
1560 | } else { | |
1561 | buf = cmd->request_buffer; | |
1562 | buflen = cmd->request_bufflen; | |
1563 | } | |
1564 | ||
1565 | *buf_out = buf; | |
1566 | return buflen; | |
1567 | } | |
1568 | ||
1569 | /** | |
1570 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1571 | * @cmd: SCSI command containing buffer to be unmapped. | |
1572 | * @buf: buffer to unmap | |
1573 | * | |
1574 | * Unmaps response buffer contained within @cmd. | |
1575 | * | |
1576 | * LOCKING: | |
1577 | * spin_lock_irqsave(host lock) | |
1578 | */ | |
1579 | ||
1580 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1581 | { | |
1582 | if (cmd->use_sg) { | |
1583 | struct scatterlist *sg; | |
1584 | ||
1585 | sg = (struct scatterlist *) cmd->request_buffer; | |
1586 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1592 | * @args: device IDENTIFY data / SCSI command of interest. | |
1593 | * @actor: Callback hook for desired SCSI command simulator | |
1594 | * | |
1595 | * Takes care of the hard work of simulating a SCSI command... | |
1596 | * Mapping the response buffer, calling the command's handler, | |
1597 | * and handling the handler's return value. This return value | |
1598 | * indicates whether the handler wishes the SCSI command to be | |
1599 | * completed successfully (0), or not (in which case cmd->result | |
1600 | * and sense buffer are assumed to be set). | |
1601 | * | |
1602 | * LOCKING: | |
1603 | * spin_lock_irqsave(host lock) | |
1604 | */ | |
1605 | ||
1606 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1607 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1608 | u8 *rbuf, unsigned int buflen)) | |
1609 | { | |
1610 | u8 *rbuf; | |
1611 | unsigned int buflen, rc; | |
1612 | struct scsi_cmnd *cmd = args->cmd; | |
1613 | ||
1614 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1615 | memset(rbuf, 0, buflen); | |
1616 | rc = actor(args, rbuf, buflen); | |
1617 | ata_scsi_rbuf_put(cmd, rbuf); | |
1618 | ||
1619 | if (rc == 0) | |
1620 | cmd->result = SAM_STAT_GOOD; | |
1621 | args->done(cmd); | |
1622 | } | |
1623 | ||
1624 | /** | |
1625 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1626 | * @idx: byte index into SCSI response buffer | |
1627 | * @val: value to set | |
1628 | * | |
1629 | * To be used by SCSI command simulator functions. This macros | |
1630 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1631 | * are in scope. | |
1632 | * | |
1633 | * LOCKING: | |
1634 | * None. | |
1635 | */ | |
1636 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1637 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1638 | } while (0) | |
1639 | ||
1640 | /** | |
1641 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1642 | * @args: device IDENTIFY data / SCSI command of interest. | |
1643 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1644 | * @buflen: Response buffer length. | |
1645 | * | |
1646 | * Returns standard device identification data associated | |
1647 | * with non-VPD INQUIRY command output. | |
1648 | * | |
1649 | * LOCKING: | |
1650 | * spin_lock_irqsave(host lock) | |
1651 | */ | |
1652 | ||
1653 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1654 | unsigned int buflen) | |
1655 | { | |
1656 | u8 hdr[] = { | |
1657 | TYPE_DISK, | |
1658 | 0, | |
1659 | 0x5, /* claim SPC-3 version compatibility */ | |
1660 | 2, | |
1661 | 95 - 4 | |
1662 | }; | |
1663 | ||
1664 | /* set scsi removeable (RMB) bit per ata bit */ | |
1665 | if (ata_id_removeable(args->id)) | |
1666 | hdr[1] |= (1 << 7); | |
1667 | ||
1668 | VPRINTK("ENTER\n"); | |
1669 | ||
1670 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1671 | ||
1672 | if (buflen > 35) { | |
1673 | memcpy(&rbuf[8], "ATA ", 8); | |
1674 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); | |
1675 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); | |
1676 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1677 | memcpy(&rbuf[32], "n/a ", 4); | |
1678 | } | |
1679 | ||
1680 | if (buflen > 63) { | |
1681 | const u8 versions[] = { | |
1682 | 0x60, /* SAM-3 (no version claimed) */ | |
1683 | ||
1684 | 0x03, | |
1685 | 0x20, /* SBC-2 (no version claimed) */ | |
1686 | ||
1687 | 0x02, | |
1688 | 0x60 /* SPC-3 (no version claimed) */ | |
1689 | }; | |
1690 | ||
1691 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1692 | } | |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | /** | |
1698 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages | |
1699 | * @args: device IDENTIFY data / SCSI command of interest. | |
1700 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1701 | * @buflen: Response buffer length. | |
1702 | * | |
1703 | * Returns list of inquiry VPD pages available. | |
1704 | * | |
1705 | * LOCKING: | |
1706 | * spin_lock_irqsave(host lock) | |
1707 | */ | |
1708 | ||
1709 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1710 | unsigned int buflen) | |
1711 | { | |
1712 | const u8 pages[] = { | |
1713 | 0x00, /* page 0x00, this page */ | |
1714 | 0x80, /* page 0x80, unit serial no page */ | |
1715 | 0x83 /* page 0x83, device ident page */ | |
1716 | }; | |
1717 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ | |
1718 | ||
1719 | if (buflen > 6) | |
1720 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1721 | ||
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | /** | |
1726 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number | |
1727 | * @args: device IDENTIFY data / SCSI command of interest. | |
1728 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1729 | * @buflen: Response buffer length. | |
1730 | * | |
1731 | * Returns ATA device serial number. | |
1732 | * | |
1733 | * LOCKING: | |
1734 | * spin_lock_irqsave(host lock) | |
1735 | */ | |
1736 | ||
1737 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1738 | unsigned int buflen) | |
1739 | { | |
1740 | const u8 hdr[] = { | |
1741 | 0, | |
1742 | 0x80, /* this page code */ | |
1743 | 0, | |
1744 | ATA_ID_SERNO_LEN, /* page len */ | |
1745 | }; | |
1746 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1747 | ||
1748 | if (buflen > (ATA_ID_SERNO_LEN + 4 - 1)) | |
1749 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
1750 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1751 | ||
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | /** | |
1756 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity | |
1757 | * @args: device IDENTIFY data / SCSI command of interest. | |
1758 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1759 | * @buflen: Response buffer length. | |
1760 | * | |
1761 | * Yields two logical unit device identification designators: | |
1762 | * - vendor specific ASCII containing the ATA serial number | |
1763 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1764 | * name ("ATA "), model and serial numbers. | |
1765 | * | |
1766 | * LOCKING: | |
1767 | * spin_lock_irqsave(host lock) | |
1768 | */ | |
1769 | ||
1770 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1771 | unsigned int buflen) | |
1772 | { | |
1773 | int num; | |
1774 | const int sat_model_serial_desc_len = 68; | |
1775 | ||
1776 | rbuf[1] = 0x83; /* this page code */ | |
1777 | num = 4; | |
1778 | ||
1779 | if (buflen > (ATA_ID_SERNO_LEN + num + 3)) { | |
1780 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ | |
1781 | rbuf[num + 0] = 2; | |
1782 | rbuf[num + 3] = ATA_ID_SERNO_LEN; | |
1783 | num += 4; | |
1784 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1785 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1786 | num += ATA_ID_SERNO_LEN; | |
1787 | } | |
1788 | if (buflen > (sat_model_serial_desc_len + num + 3)) { | |
1789 | /* SAT defined lu model and serial numbers descriptor */ | |
1790 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
1791 | rbuf[num + 0] = 2; | |
1792 | rbuf[num + 1] = 1; | |
1793 | rbuf[num + 3] = sat_model_serial_desc_len; | |
1794 | num += 4; | |
1795 | memcpy(rbuf + num, "ATA ", 8); | |
1796 | num += 8; | |
1797 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1798 | ATA_ID_PROD, ATA_ID_PROD_LEN); | |
1799 | num += ATA_ID_PROD_LEN; | |
1800 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1801 | ATA_ID_SERNO, ATA_ID_SERNO_LEN); | |
1802 | num += ATA_ID_SERNO_LEN; | |
1803 | } | |
1804 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | /** | |
1809 | * ata_scsiop_noop - Command handler that simply returns success. | |
1810 | * @args: device IDENTIFY data / SCSI command of interest. | |
1811 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1812 | * @buflen: Response buffer length. | |
1813 | * | |
1814 | * No operation. Simply returns success to caller, to indicate | |
1815 | * that the caller should successfully complete this SCSI command. | |
1816 | * | |
1817 | * LOCKING: | |
1818 | * spin_lock_irqsave(host lock) | |
1819 | */ | |
1820 | ||
1821 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1822 | unsigned int buflen) | |
1823 | { | |
1824 | VPRINTK("ENTER\n"); | |
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1830 | * @ptr_io: (input/output) Location to store more output data | |
1831 | * @last: End of output data buffer | |
1832 | * @buf: Pointer to BLOB being added to output buffer | |
1833 | * @buflen: Length of BLOB | |
1834 | * | |
1835 | * Store MODE SENSE data on an output buffer. | |
1836 | * | |
1837 | * LOCKING: | |
1838 | * None. | |
1839 | */ | |
1840 | ||
1841 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1842 | const u8 *buf, unsigned int buflen) | |
1843 | { | |
1844 | u8 *ptr = *ptr_io; | |
1845 | ||
1846 | if ((ptr + buflen - 1) > last) | |
1847 | return; | |
1848 | ||
1849 | memcpy(ptr, buf, buflen); | |
1850 | ||
1851 | ptr += buflen; | |
1852 | ||
1853 | *ptr_io = ptr; | |
1854 | } | |
1855 | ||
1856 | /** | |
1857 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1858 | * @id: device IDENTIFY data | |
1859 | * @ptr_io: (input/output) Location to store more output data | |
1860 | * @last: End of output data buffer | |
1861 | * | |
1862 | * Generate a caching info page, which conditionally indicates | |
1863 | * write caching to the SCSI layer, depending on device | |
1864 | * capabilities. | |
1865 | * | |
1866 | * LOCKING: | |
1867 | * None. | |
1868 | */ | |
1869 | ||
1870 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1871 | const u8 *last) | |
1872 | { | |
1873 | u8 page[CACHE_MPAGE_LEN]; | |
1874 | ||
1875 | memcpy(page, def_cache_mpage, sizeof(page)); | |
1876 | if (ata_id_wcache_enabled(id)) | |
1877 | page[2] |= (1 << 2); /* write cache enable */ | |
1878 | if (!ata_id_rahead_enabled(id)) | |
1879 | page[12] |= (1 << 5); /* disable read ahead */ | |
1880 | ||
1881 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1882 | return sizeof(page); | |
1883 | } | |
1884 | ||
1885 | /** | |
1886 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1887 | * @dev: Device associated with this MODE SENSE command | |
1888 | * @ptr_io: (input/output) Location to store more output data | |
1889 | * @last: End of output data buffer | |
1890 | * | |
1891 | * Generate a generic MODE SENSE control mode page. | |
1892 | * | |
1893 | * LOCKING: | |
1894 | * None. | |
1895 | */ | |
1896 | ||
1897 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1898 | { | |
1899 | ata_msense_push(ptr_io, last, def_control_mpage, | |
1900 | sizeof(def_control_mpage)); | |
1901 | return sizeof(def_control_mpage); | |
1902 | } | |
1903 | ||
1904 | /** | |
1905 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1906 | * @dev: Device associated with this MODE SENSE command | |
1907 | * @ptr_io: (input/output) Location to store more output data | |
1908 | * @last: End of output data buffer | |
1909 | * | |
1910 | * Generate a generic MODE SENSE r/w error recovery page. | |
1911 | * | |
1912 | * LOCKING: | |
1913 | * None. | |
1914 | */ | |
1915 | ||
1916 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1917 | { | |
1918 | ||
1919 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, | |
1920 | sizeof(def_rw_recovery_mpage)); | |
1921 | return sizeof(def_rw_recovery_mpage); | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * We can turn this into a real blacklist if it's needed, for now just | |
1926 | * blacklist any Maxtor BANC1G10 revision firmware | |
1927 | */ | |
1928 | static int ata_dev_supports_fua(u16 *id) | |
1929 | { | |
1930 | unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; | |
1931 | ||
1932 | if (!libata_fua) | |
1933 | return 0; | |
1934 | if (!ata_id_has_fua(id)) | |
1935 | return 0; | |
1936 | ||
1937 | ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); | |
1938 | ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); | |
1939 | ||
1940 | if (strcmp(model, "Maxtor")) | |
1941 | return 1; | |
1942 | if (strcmp(fw, "BANC1G10")) | |
1943 | return 1; | |
1944 | ||
1945 | return 0; /* blacklisted */ | |
1946 | } | |
1947 | ||
1948 | /** | |
1949 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1950 | * @args: device IDENTIFY data / SCSI command of interest. | |
1951 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1952 | * @buflen: Response buffer length. | |
1953 | * | |
1954 | * Simulate MODE SENSE commands. Assume this is invoked for direct | |
1955 | * access devices (e.g. disks) only. There should be no block | |
1956 | * descriptor for other device types. | |
1957 | * | |
1958 | * LOCKING: | |
1959 | * spin_lock_irqsave(host lock) | |
1960 | */ | |
1961 | ||
1962 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1963 | unsigned int buflen) | |
1964 | { | |
1965 | struct ata_device *dev = args->dev; | |
1966 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
1967 | const u8 sat_blk_desc[] = { | |
1968 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
1969 | 0, | |
1970 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
1971 | }; | |
1972 | u8 pg, spg; | |
1973 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
1974 | u8 dpofua; | |
1975 | ||
1976 | VPRINTK("ENTER\n"); | |
1977 | ||
1978 | six_byte = (scsicmd[0] == MODE_SENSE); | |
1979 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ | |
1980 | /* | |
1981 | * LLBA bit in msense(10) ignored (compliant) | |
1982 | */ | |
1983 | ||
1984 | page_control = scsicmd[2] >> 6; | |
1985 | switch (page_control) { | |
1986 | case 0: /* current */ | |
1987 | break; /* supported */ | |
1988 | case 3: /* saved */ | |
1989 | goto saving_not_supp; | |
1990 | case 1: /* changeable */ | |
1991 | case 2: /* defaults */ | |
1992 | default: | |
1993 | goto invalid_fld; | |
1994 | } | |
1995 | ||
1996 | if (six_byte) { | |
1997 | output_len = 4 + (ebd ? 8 : 0); | |
1998 | alloc_len = scsicmd[4]; | |
1999 | } else { | |
2000 | output_len = 8 + (ebd ? 8 : 0); | |
2001 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2002 | } | |
2003 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
2004 | ||
2005 | p = rbuf + output_len; | |
2006 | last = rbuf + minlen - 1; | |
2007 | ||
2008 | pg = scsicmd[2] & 0x3f; | |
2009 | spg = scsicmd[3]; | |
2010 | /* | |
2011 | * No mode subpages supported (yet) but asking for _all_ | |
2012 | * subpages may be valid | |
2013 | */ | |
2014 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2015 | goto invalid_fld; | |
2016 | ||
2017 | switch(pg) { | |
2018 | case RW_RECOVERY_MPAGE: | |
2019 | output_len += ata_msense_rw_recovery(&p, last); | |
2020 | break; | |
2021 | ||
2022 | case CACHE_MPAGE: | |
2023 | output_len += ata_msense_caching(args->id, &p, last); | |
2024 | break; | |
2025 | ||
2026 | case CONTROL_MPAGE: { | |
2027 | output_len += ata_msense_ctl_mode(&p, last); | |
2028 | break; | |
2029 | } | |
2030 | ||
2031 | case ALL_MPAGES: | |
2032 | output_len += ata_msense_rw_recovery(&p, last); | |
2033 | output_len += ata_msense_caching(args->id, &p, last); | |
2034 | output_len += ata_msense_ctl_mode(&p, last); | |
2035 | break; | |
2036 | ||
2037 | default: /* invalid page code */ | |
2038 | goto invalid_fld; | |
2039 | } | |
2040 | ||
2041 | if (minlen < 1) | |
2042 | return 0; | |
2043 | ||
2044 | dpofua = 0; | |
2045 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && | |
2046 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) | |
2047 | dpofua = 1 << 4; | |
2048 | ||
2049 | if (six_byte) { | |
2050 | output_len--; | |
2051 | rbuf[0] = output_len; | |
2052 | if (minlen > 2) | |
2053 | rbuf[2] |= dpofua; | |
2054 | if (ebd) { | |
2055 | if (minlen > 3) | |
2056 | rbuf[3] = sizeof(sat_blk_desc); | |
2057 | if (minlen > 11) | |
2058 | memcpy(rbuf + 4, sat_blk_desc, | |
2059 | sizeof(sat_blk_desc)); | |
2060 | } | |
2061 | } else { | |
2062 | output_len -= 2; | |
2063 | rbuf[0] = output_len >> 8; | |
2064 | if (minlen > 1) | |
2065 | rbuf[1] = output_len; | |
2066 | if (minlen > 3) | |
2067 | rbuf[3] |= dpofua; | |
2068 | if (ebd) { | |
2069 | if (minlen > 7) | |
2070 | rbuf[7] = sizeof(sat_blk_desc); | |
2071 | if (minlen > 15) | |
2072 | memcpy(rbuf + 8, sat_blk_desc, | |
2073 | sizeof(sat_blk_desc)); | |
2074 | } | |
2075 | } | |
2076 | return 0; | |
2077 | ||
2078 | invalid_fld: | |
2079 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2080 | /* "Invalid field in cbd" */ | |
2081 | return 1; | |
2082 | ||
2083 | saving_not_supp: | |
2084 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2085 | /* "Saving parameters not supported" */ | |
2086 | return 1; | |
2087 | } | |
2088 | ||
2089 | /** | |
2090 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2091 | * @args: device IDENTIFY data / SCSI command of interest. | |
2092 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2093 | * @buflen: Response buffer length. | |
2094 | * | |
2095 | * Simulate READ CAPACITY commands. | |
2096 | * | |
2097 | * LOCKING: | |
2098 | * None. | |
2099 | */ | |
2100 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
2101 | unsigned int buflen) | |
2102 | { | |
2103 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ | |
2104 | ||
2105 | VPRINTK("ENTER\n"); | |
2106 | ||
2107 | if (args->cmd->cmnd[0] == READ_CAPACITY) { | |
2108 | if (last_lba >= 0xffffffffULL) | |
2109 | last_lba = 0xffffffff; | |
2110 | ||
2111 | /* sector count, 32-bit */ | |
2112 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); | |
2113 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2114 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2115 | ATA_SCSI_RBUF_SET(3, last_lba); | |
2116 | ||
2117 | /* sector size */ | |
2118 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); | |
2119 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE); | |
2120 | } else { | |
2121 | /* sector count, 64-bit */ | |
2122 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); | |
2123 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2124 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2125 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2126 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2127 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2128 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2129 | ATA_SCSI_RBUF_SET(7, last_lba); | |
2130 | ||
2131 | /* sector size */ | |
2132 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); | |
2133 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE); | |
2134 | } | |
2135 | ||
2136 | return 0; | |
2137 | } | |
2138 | ||
2139 | /** | |
2140 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2141 | * @args: device IDENTIFY data / SCSI command of interest. | |
2142 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2143 | * @buflen: Response buffer length. | |
2144 | * | |
2145 | * Simulate REPORT LUNS command. | |
2146 | * | |
2147 | * LOCKING: | |
2148 | * spin_lock_irqsave(host lock) | |
2149 | */ | |
2150 | ||
2151 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2152 | unsigned int buflen) | |
2153 | { | |
2154 | VPRINTK("ENTER\n"); | |
2155 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2156 | ||
2157 | return 0; | |
2158 | } | |
2159 | ||
2160 | /** | |
2161 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2162 | * @cmd: SCSI request to be handled | |
2163 | * @sk: SCSI-defined sense key | |
2164 | * @asc: SCSI-defined additional sense code | |
2165 | * @ascq: SCSI-defined additional sense code qualifier | |
2166 | * | |
2167 | * Helper function that builds a valid fixed format, current | |
2168 | * response code and the given sense key (sk), additional sense | |
2169 | * code (asc) and additional sense code qualifier (ascq) with | |
2170 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2171 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2172 | * | |
2173 | * LOCKING: | |
2174 | * Not required | |
2175 | */ | |
2176 | ||
2177 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2178 | { | |
2179 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2180 | ||
2181 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2182 | cmd->sense_buffer[2] = sk; | |
2183 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2184 | cmd->sense_buffer[12] = asc; | |
2185 | cmd->sense_buffer[13] = ascq; | |
2186 | } | |
2187 | ||
2188 | /** | |
2189 | * ata_scsi_badcmd - End a SCSI request with an error | |
2190 | * @cmd: SCSI request to be handled | |
2191 | * @done: SCSI command completion function | |
2192 | * @asc: SCSI-defined additional sense code | |
2193 | * @ascq: SCSI-defined additional sense code qualifier | |
2194 | * | |
2195 | * Helper function that completes a SCSI command with | |
2196 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2197 | * and the specified additional sense codes. | |
2198 | * | |
2199 | * LOCKING: | |
2200 | * spin_lock_irqsave(host lock) | |
2201 | */ | |
2202 | ||
2203 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2204 | { | |
2205 | DPRINTK("ENTER\n"); | |
2206 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); | |
2207 | ||
2208 | done(cmd); | |
2209 | } | |
2210 | ||
2211 | static void atapi_sense_complete(struct ata_queued_cmd *qc) | |
2212 | { | |
2213 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { | |
2214 | /* FIXME: not quite right; we don't want the | |
2215 | * translation of taskfile registers into | |
2216 | * a sense descriptors, since that's only | |
2217 | * correct for ATA, not ATAPI | |
2218 | */ | |
2219 | ata_gen_passthru_sense(qc); | |
2220 | } | |
2221 | ||
2222 | qc->scsidone(qc->scsicmd); | |
2223 | ata_qc_free(qc); | |
2224 | } | |
2225 | ||
2226 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
2227 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2228 | { | |
2229 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2230 | } | |
2231 | ||
2232 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2233 | { | |
2234 | struct ata_port *ap = qc->ap; | |
2235 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2236 | ||
2237 | DPRINTK("ATAPI request sense\n"); | |
2238 | ||
2239 | /* FIXME: is this needed? */ | |
2240 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2241 | ||
2242 | ap->ops->tf_read(ap, &qc->tf); | |
2243 | ||
2244 | /* fill these in, for the case where they are -not- overwritten */ | |
2245 | cmd->sense_buffer[0] = 0x70; | |
2246 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2247 | ||
2248 | ata_qc_reinit(qc); | |
2249 | ||
2250 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); | |
2251 | qc->dma_dir = DMA_FROM_DEVICE; | |
2252 | ||
2253 | memset(&qc->cdb, 0, qc->dev->cdb_len); | |
2254 | qc->cdb[0] = REQUEST_SENSE; | |
2255 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2256 | ||
2257 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2258 | qc->tf.command = ATA_CMD_PACKET; | |
2259 | ||
2260 | if (ata_pio_use_silly(ap)) { | |
2261 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2262 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2263 | } else { | |
2264 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2265 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2266 | qc->tf.lbah = (8 * 1024) >> 8; | |
2267 | } | |
2268 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; | |
2269 | ||
2270 | qc->complete_fn = atapi_sense_complete; | |
2271 | ||
2272 | ata_qc_issue(qc); | |
2273 | ||
2274 | DPRINTK("EXIT\n"); | |
2275 | } | |
2276 | ||
2277 | static void atapi_qc_complete(struct ata_queued_cmd *qc) | |
2278 | { | |
2279 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2280 | unsigned int err_mask = qc->err_mask; | |
2281 | ||
2282 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); | |
2283 | ||
2284 | /* handle completion from new EH */ | |
2285 | if (unlikely(qc->ap->ops->error_handler && | |
2286 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2287 | ||
2288 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2289 | /* FIXME: not quite right; we don't want the | |
2290 | * translation of taskfile registers into a | |
2291 | * sense descriptors, since that's only | |
2292 | * correct for ATA, not ATAPI | |
2293 | */ | |
2294 | ata_gen_passthru_sense(qc); | |
2295 | } | |
2296 | ||
2297 | /* SCSI EH automatically locks door if sdev->locked is | |
2298 | * set. Sometimes door lock request continues to | |
2299 | * fail, for example, when no media is present. This | |
2300 | * creates a loop - SCSI EH issues door lock which | |
2301 | * fails and gets invoked again to acquire sense data | |
2302 | * for the failed command. | |
2303 | * | |
2304 | * If door lock fails, always clear sdev->locked to | |
2305 | * avoid this infinite loop. | |
2306 | */ | |
2307 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2308 | qc->dev->sdev->locked = 0; | |
2309 | ||
2310 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; | |
2311 | qc->scsidone(cmd); | |
2312 | ata_qc_free(qc); | |
2313 | return; | |
2314 | } | |
2315 | ||
2316 | /* successful completion or old EH failure path */ | |
2317 | if (unlikely(err_mask & AC_ERR_DEV)) { | |
2318 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
2319 | atapi_request_sense(qc); | |
2320 | return; | |
2321 | } else if (unlikely(err_mask)) { | |
2322 | /* FIXME: not quite right; we don't want the | |
2323 | * translation of taskfile registers into | |
2324 | * a sense descriptors, since that's only | |
2325 | * correct for ATA, not ATAPI | |
2326 | */ | |
2327 | ata_gen_passthru_sense(qc); | |
2328 | } else { | |
2329 | u8 *scsicmd = cmd->cmnd; | |
2330 | ||
2331 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { | |
2332 | u8 *buf = NULL; | |
2333 | unsigned int buflen; | |
2334 | ||
2335 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
2336 | ||
2337 | /* ATAPI devices typically report zero for their SCSI version, | |
2338 | * and sometimes deviate from the spec WRT response data | |
2339 | * format. If SCSI version is reported as zero like normal, | |
2340 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2341 | * to indicate to the Linux scsi midlayer this is a modern | |
2342 | * device. 2) Ensure response data format / ATAPI information | |
2343 | * are always correct. | |
2344 | */ | |
2345 | if (buf[2] == 0) { | |
2346 | buf[2] = 0x5; | |
2347 | buf[3] = 0x32; | |
2348 | } | |
2349 | ||
2350 | ata_scsi_rbuf_put(cmd, buf); | |
2351 | } | |
2352 | ||
2353 | cmd->result = SAM_STAT_GOOD; | |
2354 | } | |
2355 | ||
2356 | qc->scsidone(cmd); | |
2357 | ata_qc_free(qc); | |
2358 | } | |
2359 | /** | |
2360 | * atapi_xlat - Initialize PACKET taskfile | |
2361 | * @qc: command structure to be initialized | |
2362 | * | |
2363 | * LOCKING: | |
2364 | * spin_lock_irqsave(host lock) | |
2365 | * | |
2366 | * RETURNS: | |
2367 | * Zero on success, non-zero on failure. | |
2368 | */ | |
2369 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) | |
2370 | { | |
2371 | struct scsi_cmnd *scmd = qc->scsicmd; | |
2372 | struct ata_device *dev = qc->dev; | |
2373 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
2374 | int nodata = (scmd->sc_data_direction == DMA_NONE); | |
2375 | ||
2376 | if (!using_pio) | |
2377 | /* Check whether ATAPI DMA is safe */ | |
2378 | if (ata_check_atapi_dma(qc)) | |
2379 | using_pio = 1; | |
2380 | ||
2381 | memset(qc->cdb, 0, dev->cdb_len); | |
2382 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
2383 | ||
2384 | qc->complete_fn = atapi_qc_complete; | |
2385 | ||
2386 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2387 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
2388 | qc->tf.flags |= ATA_TFLAG_WRITE; | |
2389 | DPRINTK("direction: write\n"); | |
2390 | } | |
2391 | ||
2392 | qc->tf.command = ATA_CMD_PACKET; | |
2393 | ||
2394 | /* no data, or PIO data xfer */ | |
2395 | if (using_pio || nodata) { | |
2396 | if (nodata) | |
2397 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2398 | else | |
2399 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2400 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2401 | qc->tf.lbah = (8 * 1024) >> 8; | |
2402 | } | |
2403 | ||
2404 | /* DMA data xfer */ | |
2405 | else { | |
2406 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2407 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2408 | ||
2409 | if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE)) | |
2410 | /* some SATA bridges need us to indicate data xfer direction */ | |
2411 | qc->tf.feature |= ATAPI_DMADIR; | |
2412 | } | |
2413 | ||
2414 | qc->nbytes = scmd->request_bufflen; | |
2415 | ||
2416 | return 0; | |
2417 | } | |
2418 | ||
2419 | static struct ata_device * ata_find_dev(struct ata_port *ap, int id) | |
2420 | { | |
2421 | if (likely(id < ATA_MAX_DEVICES)) | |
2422 | return &ap->device[id]; | |
2423 | return NULL; | |
2424 | } | |
2425 | ||
2426 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
2427 | const struct scsi_device *scsidev) | |
2428 | { | |
2429 | /* skip commands not addressed to targets we simulate */ | |
2430 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2431 | return NULL; | |
2432 | ||
2433 | return ata_find_dev(ap, scsidev->id); | |
2434 | } | |
2435 | ||
2436 | /** | |
2437 | * ata_scsi_dev_enabled - determine if device is enabled | |
2438 | * @dev: ATA device | |
2439 | * | |
2440 | * Determine if commands should be sent to the specified device. | |
2441 | * | |
2442 | * LOCKING: | |
2443 | * spin_lock_irqsave(host lock) | |
2444 | * | |
2445 | * RETURNS: | |
2446 | * 0 if commands are not allowed / 1 if commands are allowed | |
2447 | */ | |
2448 | ||
2449 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2450 | { | |
2451 | if (unlikely(!ata_dev_enabled(dev))) | |
2452 | return 0; | |
2453 | ||
2454 | if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { | |
2455 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { | |
2456 | ata_dev_printk(dev, KERN_WARNING, | |
2457 | "WARNING: ATAPI is %s, device ignored.\n", | |
2458 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2459 | return 0; | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | return 1; | |
2464 | } | |
2465 | ||
2466 | /** | |
2467 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2468 | * @ap: ATA port to which the device is attached | |
2469 | * @scsidev: SCSI device from which we derive the ATA device | |
2470 | * | |
2471 | * Given various information provided in struct scsi_cmnd, | |
2472 | * map that onto an ATA bus, and using that mapping | |
2473 | * determine which ata_device is associated with the | |
2474 | * SCSI command to be sent. | |
2475 | * | |
2476 | * LOCKING: | |
2477 | * spin_lock_irqsave(host lock) | |
2478 | * | |
2479 | * RETURNS: | |
2480 | * Associated ATA device, or %NULL if not found. | |
2481 | */ | |
2482 | static struct ata_device * | |
2483 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) | |
2484 | { | |
2485 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); | |
2486 | ||
2487 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) | |
2488 | return NULL; | |
2489 | ||
2490 | return dev; | |
2491 | } | |
2492 | ||
2493 | /* | |
2494 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2495 | * @byte1: Byte 1 from pass-thru CDB. | |
2496 | * | |
2497 | * RETURNS: | |
2498 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2499 | */ | |
2500 | static u8 | |
2501 | ata_scsi_map_proto(u8 byte1) | |
2502 | { | |
2503 | switch((byte1 & 0x1e) >> 1) { | |
2504 | case 3: /* Non-data */ | |
2505 | return ATA_PROT_NODATA; | |
2506 | ||
2507 | case 6: /* DMA */ | |
2508 | return ATA_PROT_DMA; | |
2509 | ||
2510 | case 4: /* PIO Data-in */ | |
2511 | case 5: /* PIO Data-out */ | |
2512 | return ATA_PROT_PIO; | |
2513 | ||
2514 | case 10: /* Device Reset */ | |
2515 | case 0: /* Hard Reset */ | |
2516 | case 1: /* SRST */ | |
2517 | case 2: /* Bus Idle */ | |
2518 | case 7: /* Packet */ | |
2519 | case 8: /* DMA Queued */ | |
2520 | case 9: /* Device Diagnostic */ | |
2521 | case 11: /* UDMA Data-in */ | |
2522 | case 12: /* UDMA Data-Out */ | |
2523 | case 13: /* FPDMA */ | |
2524 | default: /* Reserved */ | |
2525 | break; | |
2526 | } | |
2527 | ||
2528 | return ATA_PROT_UNKNOWN; | |
2529 | } | |
2530 | ||
2531 | /** | |
2532 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2533 | * @qc: command structure to be initialized | |
2534 | * | |
2535 | * Handles either 12 or 16-byte versions of the CDB. | |
2536 | * | |
2537 | * RETURNS: | |
2538 | * Zero on success, non-zero on failure. | |
2539 | */ | |
2540 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) | |
2541 | { | |
2542 | struct ata_taskfile *tf = &(qc->tf); | |
2543 | struct scsi_cmnd *scmd = qc->scsicmd; | |
2544 | struct ata_device *dev = qc->dev; | |
2545 | const u8 *cdb = scmd->cmnd; | |
2546 | ||
2547 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) | |
2548 | goto invalid_fld; | |
2549 | ||
2550 | /* We may not issue DMA commands if no DMA mode is set */ | |
2551 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2552 | goto invalid_fld; | |
2553 | ||
2554 | if (cdb[1] & 0xe0) | |
2555 | /* PIO multi not supported yet */ | |
2556 | goto invalid_fld; | |
2557 | ||
2558 | /* | |
2559 | * 12 and 16 byte CDBs use different offsets to | |
2560 | * provide the various register values. | |
2561 | */ | |
2562 | if (cdb[0] == ATA_16) { | |
2563 | /* | |
2564 | * 16-byte CDB - may contain extended commands. | |
2565 | * | |
2566 | * If that is the case, copy the upper byte register values. | |
2567 | */ | |
2568 | if (cdb[1] & 0x01) { | |
2569 | tf->hob_feature = cdb[3]; | |
2570 | tf->hob_nsect = cdb[5]; | |
2571 | tf->hob_lbal = cdb[7]; | |
2572 | tf->hob_lbam = cdb[9]; | |
2573 | tf->hob_lbah = cdb[11]; | |
2574 | tf->flags |= ATA_TFLAG_LBA48; | |
2575 | } else | |
2576 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2577 | ||
2578 | /* | |
2579 | * Always copy low byte, device and command registers. | |
2580 | */ | |
2581 | tf->feature = cdb[4]; | |
2582 | tf->nsect = cdb[6]; | |
2583 | tf->lbal = cdb[8]; | |
2584 | tf->lbam = cdb[10]; | |
2585 | tf->lbah = cdb[12]; | |
2586 | tf->device = cdb[13]; | |
2587 | tf->command = cdb[14]; | |
2588 | } else { | |
2589 | /* | |
2590 | * 12-byte CDB - incapable of extended commands. | |
2591 | */ | |
2592 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2593 | ||
2594 | tf->feature = cdb[3]; | |
2595 | tf->nsect = cdb[4]; | |
2596 | tf->lbal = cdb[5]; | |
2597 | tf->lbam = cdb[6]; | |
2598 | tf->lbah = cdb[7]; | |
2599 | tf->device = cdb[8]; | |
2600 | tf->command = cdb[9]; | |
2601 | } | |
2602 | /* | |
2603 | * If slave is possible, enforce correct master/slave bit | |
2604 | */ | |
2605 | if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) | |
2606 | tf->device = qc->dev->devno ? | |
2607 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
2608 | ||
2609 | /* READ/WRITE LONG use a non-standard sect_size */ | |
2610 | qc->sect_size = ATA_SECT_SIZE; | |
2611 | switch (tf->command) { | |
2612 | case ATA_CMD_READ_LONG: | |
2613 | case ATA_CMD_READ_LONG_ONCE: | |
2614 | case ATA_CMD_WRITE_LONG: | |
2615 | case ATA_CMD_WRITE_LONG_ONCE: | |
2616 | if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) | |
2617 | goto invalid_fld; | |
2618 | qc->sect_size = scmd->request_bufflen; | |
2619 | } | |
2620 | ||
2621 | /* | |
2622 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2623 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2624 | * by an update to hardware-specific registers for each | |
2625 | * controller (i.e. the reason for ->set_piomode(), | |
2626 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2627 | */ | |
2628 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2629 | && (tf->feature == SETFEATURES_XFER)) | |
2630 | goto invalid_fld; | |
2631 | ||
2632 | /* | |
2633 | * Set flags so that all registers will be written, | |
2634 | * and pass on write indication (used for PIO/DMA | |
2635 | * setup.) | |
2636 | */ | |
2637 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2638 | ||
2639 | if (scmd->sc_data_direction == DMA_TO_DEVICE) | |
2640 | tf->flags |= ATA_TFLAG_WRITE; | |
2641 | ||
2642 | /* | |
2643 | * Set transfer length. | |
2644 | * | |
2645 | * TODO: find out if we need to do more here to | |
2646 | * cover scatter/gather case. | |
2647 | */ | |
2648 | qc->nbytes = scmd->request_bufflen; | |
2649 | ||
2650 | /* request result TF */ | |
2651 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2652 | ||
2653 | return 0; | |
2654 | ||
2655 | invalid_fld: | |
2656 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); | |
2657 | /* "Invalid field in cdb" */ | |
2658 | return 1; | |
2659 | } | |
2660 | ||
2661 | /** | |
2662 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2663 | * @dev: ATA device | |
2664 | * @cmd: SCSI command opcode to consider | |
2665 | * | |
2666 | * Look up the SCSI command given, and determine whether the | |
2667 | * SCSI command is to be translated or simulated. | |
2668 | * | |
2669 | * RETURNS: | |
2670 | * Pointer to translation function if possible, %NULL if not. | |
2671 | */ | |
2672 | ||
2673 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2674 | { | |
2675 | switch (cmd) { | |
2676 | case READ_6: | |
2677 | case READ_10: | |
2678 | case READ_16: | |
2679 | ||
2680 | case WRITE_6: | |
2681 | case WRITE_10: | |
2682 | case WRITE_16: | |
2683 | return ata_scsi_rw_xlat; | |
2684 | ||
2685 | case SYNCHRONIZE_CACHE: | |
2686 | if (ata_try_flush_cache(dev)) | |
2687 | return ata_scsi_flush_xlat; | |
2688 | break; | |
2689 | ||
2690 | case VERIFY: | |
2691 | case VERIFY_16: | |
2692 | return ata_scsi_verify_xlat; | |
2693 | ||
2694 | case ATA_12: | |
2695 | case ATA_16: | |
2696 | return ata_scsi_pass_thru; | |
2697 | ||
2698 | case START_STOP: | |
2699 | return ata_scsi_start_stop_xlat; | |
2700 | } | |
2701 | ||
2702 | return NULL; | |
2703 | } | |
2704 | ||
2705 | /** | |
2706 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2707 | * @ap: ATA port to which the command was being sent | |
2708 | * @cmd: SCSI command to dump | |
2709 | * | |
2710 | * Prints the contents of a SCSI command via printk(). | |
2711 | */ | |
2712 | ||
2713 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2714 | struct scsi_cmnd *cmd) | |
2715 | { | |
2716 | #ifdef ATA_DEBUG | |
2717 | struct scsi_device *scsidev = cmd->device; | |
2718 | u8 *scsicmd = cmd->cmnd; | |
2719 | ||
2720 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2721 | ap->print_id, | |
2722 | scsidev->channel, scsidev->id, scsidev->lun, | |
2723 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2724 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2725 | scsicmd[8]); | |
2726 | #endif | |
2727 | } | |
2728 | ||
2729 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, | |
2730 | void (*done)(struct scsi_cmnd *), | |
2731 | struct ata_device *dev) | |
2732 | { | |
2733 | int rc = 0; | |
2734 | ||
2735 | if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) { | |
2736 | DPRINTK("bad CDB len=%u, max=%u\n", | |
2737 | scmd->cmd_len, dev->cdb_len); | |
2738 | scmd->result = DID_ERROR << 16; | |
2739 | done(scmd); | |
2740 | return 0; | |
2741 | } | |
2742 | ||
2743 | if (dev->class == ATA_DEV_ATA) { | |
2744 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
2745 | scmd->cmnd[0]); | |
2746 | ||
2747 | if (xlat_func) | |
2748 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); | |
2749 | else | |
2750 | ata_scsi_simulate(dev, scmd, done); | |
2751 | } else | |
2752 | rc = ata_scsi_translate(dev, scmd, done, atapi_xlat); | |
2753 | ||
2754 | return rc; | |
2755 | } | |
2756 | ||
2757 | /** | |
2758 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2759 | * @cmd: SCSI command to be sent | |
2760 | * @done: Completion function, called when command is complete | |
2761 | * | |
2762 | * In some cases, this function translates SCSI commands into | |
2763 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2764 | * hardware. In other cases, this function simulates a | |
2765 | * SCSI device by evaluating and responding to certain | |
2766 | * SCSI commands. This creates the overall effect of | |
2767 | * ATA and ATAPI devices appearing as SCSI devices. | |
2768 | * | |
2769 | * LOCKING: | |
2770 | * Releases scsi-layer-held lock, and obtains host lock. | |
2771 | * | |
2772 | * RETURNS: | |
2773 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, | |
2774 | * 0 otherwise. | |
2775 | */ | |
2776 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
2777 | { | |
2778 | struct ata_port *ap; | |
2779 | struct ata_device *dev; | |
2780 | struct scsi_device *scsidev = cmd->device; | |
2781 | struct Scsi_Host *shost = scsidev->host; | |
2782 | int rc = 0; | |
2783 | ||
2784 | ap = ata_shost_to_port(shost); | |
2785 | ||
2786 | spin_unlock(shost->host_lock); | |
2787 | spin_lock(ap->lock); | |
2788 | ||
2789 | ata_scsi_dump_cdb(ap, cmd); | |
2790 | ||
2791 | dev = ata_scsi_find_dev(ap, scsidev); | |
2792 | if (likely(dev)) | |
2793 | rc = __ata_scsi_queuecmd(cmd, done, dev); | |
2794 | else { | |
2795 | cmd->result = (DID_BAD_TARGET << 16); | |
2796 | done(cmd); | |
2797 | } | |
2798 | ||
2799 | spin_unlock(ap->lock); | |
2800 | spin_lock(shost->host_lock); | |
2801 | return rc; | |
2802 | } | |
2803 | ||
2804 | /** | |
2805 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
2806 | * @dev: the target device | |
2807 | * @cmd: SCSI command being sent to device. | |
2808 | * @done: SCSI command completion function. | |
2809 | * | |
2810 | * Interprets and directly executes a select list of SCSI commands | |
2811 | * that can be handled internally. | |
2812 | * | |
2813 | * LOCKING: | |
2814 | * spin_lock_irqsave(host lock) | |
2815 | */ | |
2816 | ||
2817 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, | |
2818 | void (*done)(struct scsi_cmnd *)) | |
2819 | { | |
2820 | struct ata_scsi_args args; | |
2821 | const u8 *scsicmd = cmd->cmnd; | |
2822 | ||
2823 | args.dev = dev; | |
2824 | args.id = dev->id; | |
2825 | args.cmd = cmd; | |
2826 | args.done = done; | |
2827 | ||
2828 | switch(scsicmd[0]) { | |
2829 | /* no-op's, complete with success */ | |
2830 | case SYNCHRONIZE_CACHE: | |
2831 | case REZERO_UNIT: | |
2832 | case SEEK_6: | |
2833 | case SEEK_10: | |
2834 | case TEST_UNIT_READY: | |
2835 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2836 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2837 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2838 | break; | |
2839 | ||
2840 | case INQUIRY: | |
2841 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
2842 | ata_scsi_invalid_field(cmd, done); | |
2843 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ | |
2844 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2845 | else if (scsicmd[2] == 0x00) | |
2846 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2847 | else if (scsicmd[2] == 0x80) | |
2848 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2849 | else if (scsicmd[2] == 0x83) | |
2850 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2851 | else | |
2852 | ata_scsi_invalid_field(cmd, done); | |
2853 | break; | |
2854 | ||
2855 | case MODE_SENSE: | |
2856 | case MODE_SENSE_10: | |
2857 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2858 | break; | |
2859 | ||
2860 | case MODE_SELECT: /* unconditionally return */ | |
2861 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
2862 | ata_scsi_invalid_field(cmd, done); | |
2863 | break; | |
2864 | ||
2865 | case READ_CAPACITY: | |
2866 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2867 | break; | |
2868 | ||
2869 | case SERVICE_ACTION_IN: | |
2870 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2871 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2872 | else | |
2873 | ata_scsi_invalid_field(cmd, done); | |
2874 | break; | |
2875 | ||
2876 | case REPORT_LUNS: | |
2877 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2878 | break; | |
2879 | ||
2880 | /* mandatory commands we haven't implemented yet */ | |
2881 | case REQUEST_SENSE: | |
2882 | ||
2883 | /* all other commands */ | |
2884 | default: | |
2885 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
2886 | /* "Invalid command operation code" */ | |
2887 | done(cmd); | |
2888 | break; | |
2889 | } | |
2890 | } | |
2891 | ||
2892 | int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) | |
2893 | { | |
2894 | int i, rc; | |
2895 | ||
2896 | for (i = 0; i < host->n_ports; i++) { | |
2897 | struct ata_port *ap = host->ports[i]; | |
2898 | struct Scsi_Host *shost; | |
2899 | ||
2900 | rc = -ENOMEM; | |
2901 | shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); | |
2902 | if (!shost) | |
2903 | goto err_alloc; | |
2904 | ||
2905 | *(struct ata_port **)&shost->hostdata[0] = ap; | |
2906 | ap->scsi_host = shost; | |
2907 | ||
2908 | shost->transportt = &ata_scsi_transport_template; | |
2909 | shost->unique_id = ap->print_id; | |
2910 | shost->max_id = 16; | |
2911 | shost->max_lun = 1; | |
2912 | shost->max_channel = 1; | |
2913 | shost->max_cmd_len = 16; | |
2914 | ||
2915 | rc = scsi_add_host(ap->scsi_host, ap->host->dev); | |
2916 | if (rc) | |
2917 | goto err_add; | |
2918 | } | |
2919 | ||
2920 | return 0; | |
2921 | ||
2922 | err_add: | |
2923 | scsi_host_put(host->ports[i]->scsi_host); | |
2924 | err_alloc: | |
2925 | while (--i >= 0) { | |
2926 | struct Scsi_Host *shost = host->ports[i]->scsi_host; | |
2927 | ||
2928 | scsi_remove_host(shost); | |
2929 | scsi_host_put(shost); | |
2930 | } | |
2931 | return rc; | |
2932 | } | |
2933 | ||
2934 | void ata_scsi_scan_host(struct ata_port *ap) | |
2935 | { | |
2936 | unsigned int i; | |
2937 | ||
2938 | if (ap->flags & ATA_FLAG_DISABLED) | |
2939 | return; | |
2940 | ||
2941 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
2942 | struct ata_device *dev = &ap->device[i]; | |
2943 | struct scsi_device *sdev; | |
2944 | ||
2945 | if (!ata_dev_enabled(dev) || dev->sdev) | |
2946 | continue; | |
2947 | ||
2948 | sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL); | |
2949 | if (!IS_ERR(sdev)) { | |
2950 | dev->sdev = sdev; | |
2951 | scsi_device_put(sdev); | |
2952 | } | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | /** | |
2957 | * ata_scsi_offline_dev - offline attached SCSI device | |
2958 | * @dev: ATA device to offline attached SCSI device for | |
2959 | * | |
2960 | * This function is called from ata_eh_hotplug() and responsible | |
2961 | * for taking the SCSI device attached to @dev offline. This | |
2962 | * function is called with host lock which protects dev->sdev | |
2963 | * against clearing. | |
2964 | * | |
2965 | * LOCKING: | |
2966 | * spin_lock_irqsave(host lock) | |
2967 | * | |
2968 | * RETURNS: | |
2969 | * 1 if attached SCSI device exists, 0 otherwise. | |
2970 | */ | |
2971 | int ata_scsi_offline_dev(struct ata_device *dev) | |
2972 | { | |
2973 | if (dev->sdev) { | |
2974 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
2975 | return 1; | |
2976 | } | |
2977 | return 0; | |
2978 | } | |
2979 | ||
2980 | /** | |
2981 | * ata_scsi_remove_dev - remove attached SCSI device | |
2982 | * @dev: ATA device to remove attached SCSI device for | |
2983 | * | |
2984 | * This function is called from ata_eh_scsi_hotplug() and | |
2985 | * responsible for removing the SCSI device attached to @dev. | |
2986 | * | |
2987 | * LOCKING: | |
2988 | * Kernel thread context (may sleep). | |
2989 | */ | |
2990 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
2991 | { | |
2992 | struct ata_port *ap = dev->ap; | |
2993 | struct scsi_device *sdev; | |
2994 | unsigned long flags; | |
2995 | ||
2996 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
2997 | * state doesn't change underneath us and thus | |
2998 | * scsi_device_get() always succeeds. The mutex locking can | |
2999 | * be removed if there is __scsi_device_get() interface which | |
3000 | * increments reference counts regardless of device state. | |
3001 | */ | |
3002 | mutex_lock(&ap->scsi_host->scan_mutex); | |
3003 | spin_lock_irqsave(ap->lock, flags); | |
3004 | ||
3005 | /* clearing dev->sdev is protected by host lock */ | |
3006 | sdev = dev->sdev; | |
3007 | dev->sdev = NULL; | |
3008 | ||
3009 | if (sdev) { | |
3010 | /* If user initiated unplug races with us, sdev can go | |
3011 | * away underneath us after the host lock and | |
3012 | * scan_mutex are released. Hold onto it. | |
3013 | */ | |
3014 | if (scsi_device_get(sdev) == 0) { | |
3015 | /* The following ensures the attached sdev is | |
3016 | * offline on return from ata_scsi_offline_dev() | |
3017 | * regardless it wins or loses the race | |
3018 | * against this function. | |
3019 | */ | |
3020 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3021 | } else { | |
3022 | WARN_ON(1); | |
3023 | sdev = NULL; | |
3024 | } | |
3025 | } | |
3026 | ||
3027 | spin_unlock_irqrestore(ap->lock, flags); | |
3028 | mutex_unlock(&ap->scsi_host->scan_mutex); | |
3029 | ||
3030 | if (sdev) { | |
3031 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3032 | sdev->sdev_gendev.bus_id); | |
3033 | ||
3034 | scsi_remove_device(sdev); | |
3035 | scsi_device_put(sdev); | |
3036 | } | |
3037 | } | |
3038 | ||
3039 | /** | |
3040 | * ata_scsi_hotplug - SCSI part of hotplug | |
3041 | * @work: Pointer to ATA port to perform SCSI hotplug on | |
3042 | * | |
3043 | * Perform SCSI part of hotplug. It's executed from a separate | |
3044 | * workqueue after EH completes. This is necessary because SCSI | |
3045 | * hot plugging requires working EH and hot unplugging is | |
3046 | * synchronized with hot plugging with a mutex. | |
3047 | * | |
3048 | * LOCKING: | |
3049 | * Kernel thread context (may sleep). | |
3050 | */ | |
3051 | void ata_scsi_hotplug(struct work_struct *work) | |
3052 | { | |
3053 | struct ata_port *ap = | |
3054 | container_of(work, struct ata_port, hotplug_task.work); | |
3055 | int i; | |
3056 | ||
3057 | if (ap->pflags & ATA_PFLAG_UNLOADING) { | |
3058 | DPRINTK("ENTER/EXIT - unloading\n"); | |
3059 | return; | |
3060 | } | |
3061 | ||
3062 | DPRINTK("ENTER\n"); | |
3063 | ||
3064 | /* unplug detached devices */ | |
3065 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3066 | struct ata_device *dev = &ap->device[i]; | |
3067 | unsigned long flags; | |
3068 | ||
3069 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3070 | continue; | |
3071 | ||
3072 | spin_lock_irqsave(ap->lock, flags); | |
3073 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3074 | spin_unlock_irqrestore(ap->lock, flags); | |
3075 | ||
3076 | ata_scsi_remove_dev(dev); | |
3077 | } | |
3078 | ||
3079 | /* scan for new ones */ | |
3080 | ata_scsi_scan_host(ap); | |
3081 | ||
3082 | /* If we scanned while EH was in progress, scan would have | |
3083 | * failed silently. Requeue if there are enabled but | |
3084 | * unattached devices. | |
3085 | */ | |
3086 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3087 | struct ata_device *dev = &ap->device[i]; | |
3088 | if (ata_dev_enabled(dev) && !dev->sdev) { | |
3089 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, | |
3090 | round_jiffies_relative(HZ)); | |
3091 | break; | |
3092 | } | |
3093 | } | |
3094 | ||
3095 | DPRINTK("EXIT\n"); | |
3096 | } | |
3097 | ||
3098 | /** | |
3099 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3100 | * @shost: SCSI host to scan | |
3101 | * @channel: Channel to scan | |
3102 | * @id: ID to scan | |
3103 | * @lun: LUN to scan | |
3104 | * | |
3105 | * This function is called when user explicitly requests bus | |
3106 | * scan. Set probe pending flag and invoke EH. | |
3107 | * | |
3108 | * LOCKING: | |
3109 | * SCSI layer (we don't care) | |
3110 | * | |
3111 | * RETURNS: | |
3112 | * Zero. | |
3113 | */ | |
3114 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3115 | unsigned int id, unsigned int lun) | |
3116 | { | |
3117 | struct ata_port *ap = ata_shost_to_port(shost); | |
3118 | unsigned long flags; | |
3119 | int rc = 0; | |
3120 | ||
3121 | if (!ap->ops->error_handler) | |
3122 | return -EOPNOTSUPP; | |
3123 | ||
3124 | if ((channel != SCAN_WILD_CARD && channel != 0) || | |
3125 | (lun != SCAN_WILD_CARD && lun != 0)) | |
3126 | return -EINVAL; | |
3127 | ||
3128 | spin_lock_irqsave(ap->lock, flags); | |
3129 | ||
3130 | if (id == SCAN_WILD_CARD) { | |
3131 | ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; | |
3132 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3133 | } else { | |
3134 | struct ata_device *dev = ata_find_dev(ap, id); | |
3135 | ||
3136 | if (dev) { | |
3137 | ap->eh_info.probe_mask |= 1 << dev->devno; | |
3138 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3139 | ap->eh_info.flags |= ATA_EHI_RESUME_LINK; | |
3140 | } else | |
3141 | rc = -EINVAL; | |
3142 | } | |
3143 | ||
3144 | if (rc == 0) { | |
3145 | ata_port_schedule_eh(ap); | |
3146 | spin_unlock_irqrestore(ap->lock, flags); | |
3147 | ata_port_wait_eh(ap); | |
3148 | } else | |
3149 | spin_unlock_irqrestore(ap->lock, flags); | |
3150 | ||
3151 | return rc; | |
3152 | } | |
3153 | ||
3154 | /** | |
3155 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() | |
3156 | * @work: Pointer to ATA port to perform scsi_rescan_device() | |
3157 | * | |
3158 | * After ATA pass thru (SAT) commands are executed successfully, | |
3159 | * libata need to propagate the changes to SCSI layer. This | |
3160 | * function must be executed from ata_aux_wq such that sdev | |
3161 | * attach/detach don't race with rescan. | |
3162 | * | |
3163 | * LOCKING: | |
3164 | * Kernel thread context (may sleep). | |
3165 | */ | |
3166 | void ata_scsi_dev_rescan(struct work_struct *work) | |
3167 | { | |
3168 | struct ata_port *ap = | |
3169 | container_of(work, struct ata_port, scsi_rescan_task); | |
3170 | unsigned long flags; | |
3171 | unsigned int i; | |
3172 | ||
3173 | spin_lock_irqsave(ap->lock, flags); | |
3174 | ||
3175 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3176 | struct ata_device *dev = &ap->device[i]; | |
3177 | struct scsi_device *sdev = dev->sdev; | |
3178 | ||
3179 | if (!ata_dev_enabled(dev) || !sdev) | |
3180 | continue; | |
3181 | if (scsi_device_get(sdev)) | |
3182 | continue; | |
3183 | ||
3184 | spin_unlock_irqrestore(ap->lock, flags); | |
3185 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3186 | scsi_device_put(sdev); | |
3187 | spin_lock_irqsave(ap->lock, flags); | |
3188 | } | |
3189 | ||
3190 | spin_unlock_irqrestore(ap->lock, flags); | |
3191 | } | |
3192 | ||
3193 | /** | |
3194 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
3195 | * @host: ATA host container for all SAS ports | |
3196 | * @port_info: Information from low-level host driver | |
3197 | * @shost: SCSI host that the scsi device is attached to | |
3198 | * | |
3199 | * LOCKING: | |
3200 | * PCI/etc. bus probe sem. | |
3201 | * | |
3202 | * RETURNS: | |
3203 | * ata_port pointer on success / NULL on failure. | |
3204 | */ | |
3205 | ||
3206 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, | |
3207 | struct ata_port_info *port_info, | |
3208 | struct Scsi_Host *shost) | |
3209 | { | |
3210 | struct ata_port *ap; | |
3211 | ||
3212 | ap = ata_port_alloc(host); | |
3213 | if (!ap) | |
3214 | return NULL; | |
3215 | ||
3216 | ap->port_no = 0; | |
3217 | ap->lock = shost->host_lock; | |
3218 | ap->pio_mask = port_info->pio_mask; | |
3219 | ap->mwdma_mask = port_info->mwdma_mask; | |
3220 | ap->udma_mask = port_info->udma_mask; | |
3221 | ap->flags |= port_info->flags; | |
3222 | ap->ops = port_info->port_ops; | |
3223 | ap->cbl = ATA_CBL_SATA; | |
3224 | ||
3225 | return ap; | |
3226 | } | |
3227 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3228 | ||
3229 | /** | |
3230 | * ata_sas_port_start - Set port up for dma. | |
3231 | * @ap: Port to initialize | |
3232 | * | |
3233 | * Called just after data structures for each port are | |
3234 | * initialized. Allocates DMA pad. | |
3235 | * | |
3236 | * May be used as the port_start() entry in ata_port_operations. | |
3237 | * | |
3238 | * LOCKING: | |
3239 | * Inherited from caller. | |
3240 | */ | |
3241 | int ata_sas_port_start(struct ata_port *ap) | |
3242 | { | |
3243 | return ata_pad_alloc(ap, ap->dev); | |
3244 | } | |
3245 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3246 | ||
3247 | /** | |
3248 | * ata_port_stop - Undo ata_sas_port_start() | |
3249 | * @ap: Port to shut down | |
3250 | * | |
3251 | * Frees the DMA pad. | |
3252 | * | |
3253 | * May be used as the port_stop() entry in ata_port_operations. | |
3254 | * | |
3255 | * LOCKING: | |
3256 | * Inherited from caller. | |
3257 | */ | |
3258 | ||
3259 | void ata_sas_port_stop(struct ata_port *ap) | |
3260 | { | |
3261 | ata_pad_free(ap, ap->dev); | |
3262 | } | |
3263 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3264 | ||
3265 | /** | |
3266 | * ata_sas_port_init - Initialize a SATA device | |
3267 | * @ap: SATA port to initialize | |
3268 | * | |
3269 | * LOCKING: | |
3270 | * PCI/etc. bus probe sem. | |
3271 | * | |
3272 | * RETURNS: | |
3273 | * Zero on success, non-zero on error. | |
3274 | */ | |
3275 | ||
3276 | int ata_sas_port_init(struct ata_port *ap) | |
3277 | { | |
3278 | int rc = ap->ops->port_start(ap); | |
3279 | ||
3280 | if (!rc) { | |
3281 | ap->print_id = ata_print_id++; | |
3282 | rc = ata_bus_probe(ap); | |
3283 | } | |
3284 | ||
3285 | return rc; | |
3286 | } | |
3287 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3288 | ||
3289 | /** | |
3290 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3291 | * @ap: SATA port to destroy | |
3292 | * | |
3293 | */ | |
3294 | ||
3295 | void ata_sas_port_destroy(struct ata_port *ap) | |
3296 | { | |
3297 | if (ap->ops->port_stop) | |
3298 | ap->ops->port_stop(ap); | |
3299 | kfree(ap); | |
3300 | } | |
3301 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3302 | ||
3303 | /** | |
3304 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3305 | * @sdev: SCSI device to configure | |
3306 | * @ap: ATA port to which SCSI device is attached | |
3307 | * | |
3308 | * RETURNS: | |
3309 | * Zero. | |
3310 | */ | |
3311 | ||
3312 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3313 | { | |
3314 | ata_scsi_sdev_config(sdev); | |
3315 | ata_scsi_dev_config(sdev, ap->device); | |
3316 | return 0; | |
3317 | } | |
3318 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3319 | ||
3320 | /** | |
3321 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3322 | * @cmd: SCSI command to be sent | |
3323 | * @done: Completion function, called when command is complete | |
3324 | * @ap: ATA port to which the command is being sent | |
3325 | * | |
3326 | * RETURNS: | |
3327 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, | |
3328 | * 0 otherwise. | |
3329 | */ | |
3330 | ||
3331 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3332 | struct ata_port *ap) | |
3333 | { | |
3334 | int rc = 0; | |
3335 | ||
3336 | ata_scsi_dump_cdb(ap, cmd); | |
3337 | ||
3338 | if (likely(ata_scsi_dev_enabled(ap->device))) | |
3339 | rc = __ata_scsi_queuecmd(cmd, done, ap->device); | |
3340 | else { | |
3341 | cmd->result = (DID_BAD_TARGET << 16); | |
3342 | done(cmd); | |
3343 | } | |
3344 | return rc; | |
3345 | } | |
3346 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |