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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, const u8 *scsicmd); | |
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 | 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_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
153 | * @scsidev: Device to which we are issuing command | |
154 | * @arg: User provided data for issuing command | |
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 | ||
163 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) | |
164 | { | |
165 | int rc = 0; | |
166 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
167 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; | |
168 | int argsize = 0; | |
169 | enum dma_data_direction data_dir; | |
170 | int cmd_result; | |
171 | ||
172 | if (arg == NULL) | |
173 | return -EINVAL; | |
174 | ||
175 | if (copy_from_user(args, arg, sizeof(args))) | |
176 | return -EFAULT; | |
177 | ||
178 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); | |
179 | if (!sensebuf) | |
180 | return -ENOMEM; | |
181 | ||
182 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
183 | ||
184 | if (args[3]) { | |
185 | argsize = SECTOR_SIZE * args[3]; | |
186 | argbuf = kmalloc(argsize, GFP_KERNEL); | |
187 | if (argbuf == NULL) { | |
188 | rc = -ENOMEM; | |
189 | goto error; | |
190 | } | |
191 | ||
192 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ | |
193 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, | |
194 | block count in sector count field */ | |
195 | data_dir = DMA_FROM_DEVICE; | |
196 | } else { | |
197 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
198 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ | |
199 | data_dir = DMA_NONE; | |
200 | } | |
201 | ||
202 | scsi_cmd[0] = ATA_16; | |
203 | ||
204 | scsi_cmd[4] = args[2]; | |
205 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ | |
206 | scsi_cmd[6] = args[3]; | |
207 | scsi_cmd[8] = args[1]; | |
208 | scsi_cmd[10] = 0x4f; | |
209 | scsi_cmd[12] = 0xc2; | |
210 | } else { | |
211 | scsi_cmd[6] = args[1]; | |
212 | } | |
213 | scsi_cmd[14] = args[0]; | |
214 | ||
215 | /* Good values for timeout and retries? Values below | |
216 | from scsi_ioctl_send_command() for default case... */ | |
217 | cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, | |
218 | sensebuf, (10*HZ), 5, 0); | |
219 | ||
220 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
221 | u8 *desc = sensebuf + 8; | |
222 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
223 | ||
224 | /* If we set cc then ATA pass-through will cause a | |
225 | * check condition even if no error. Filter that. */ | |
226 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
227 | struct scsi_sense_hdr sshdr; | |
228 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
229 | &sshdr); | |
230 | if (sshdr.sense_key==0 && | |
231 | sshdr.asc==0 && sshdr.ascq==0) | |
232 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; | |
233 | } | |
234 | ||
235 | /* Send userspace a few ATA registers (same as drivers/ide) */ | |
236 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
237 | desc[0] == 0x09 ) { /* code is "ATA Descriptor" */ | |
238 | args[0] = desc[13]; /* status */ | |
239 | args[1] = desc[3]; /* error */ | |
240 | args[2] = desc[5]; /* sector count (0:7) */ | |
241 | if (copy_to_user(arg, args, sizeof(args))) | |
242 | rc = -EFAULT; | |
243 | } | |
244 | } | |
245 | ||
246 | ||
247 | if (cmd_result) { | |
248 | rc = -EIO; | |
249 | goto error; | |
250 | } | |
251 | ||
252 | if ((argbuf) | |
253 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) | |
254 | rc = -EFAULT; | |
255 | error: | |
256 | kfree(sensebuf); | |
257 | kfree(argbuf); | |
258 | return rc; | |
259 | } | |
260 | ||
261 | /** | |
262 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
263 | * @scsidev: Device to which we are issuing command | |
264 | * @arg: User provided data for issuing command | |
265 | * | |
266 | * LOCKING: | |
267 | * Defined by the SCSI layer. We don't really care. | |
268 | * | |
269 | * RETURNS: | |
270 | * Zero on success, negative errno on error. | |
271 | */ | |
272 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) | |
273 | { | |
274 | int rc = 0; | |
275 | u8 scsi_cmd[MAX_COMMAND_SIZE]; | |
276 | u8 args[7]; | |
277 | struct scsi_sense_hdr sshdr; | |
278 | ||
279 | if (arg == NULL) | |
280 | return -EINVAL; | |
281 | ||
282 | if (copy_from_user(args, arg, sizeof(args))) | |
283 | return -EFAULT; | |
284 | ||
285 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); | |
286 | scsi_cmd[0] = ATA_16; | |
287 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
288 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ | |
289 | scsi_cmd[4] = args[1]; | |
290 | scsi_cmd[6] = args[2]; | |
291 | scsi_cmd[8] = args[3]; | |
292 | scsi_cmd[10] = args[4]; | |
293 | scsi_cmd[12] = args[5]; | |
294 | scsi_cmd[14] = args[0]; | |
295 | ||
296 | /* Good values for timeout and retries? Values below | |
297 | from scsi_ioctl_send_command() for default case... */ | |
298 | if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr, | |
299 | (10*HZ), 5)) | |
300 | rc = -EIO; | |
301 | ||
302 | /* Need code to retrieve data from check condition? */ | |
303 | return rc; | |
304 | } | |
305 | ||
306 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) | |
307 | { | |
308 | int val = -EINVAL, rc = -EINVAL; | |
309 | ||
310 | switch (cmd) { | |
311 | case ATA_IOC_GET_IO32: | |
312 | val = 0; | |
313 | if (copy_to_user(arg, &val, 1)) | |
314 | return -EFAULT; | |
315 | return 0; | |
316 | ||
317 | case ATA_IOC_SET_IO32: | |
318 | val = (unsigned long) arg; | |
319 | if (val != 0) | |
320 | return -EINVAL; | |
321 | return 0; | |
322 | ||
323 | case HDIO_DRIVE_CMD: | |
324 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
325 | return -EACCES; | |
326 | return ata_cmd_ioctl(scsidev, arg); | |
327 | ||
328 | case HDIO_DRIVE_TASK: | |
329 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
330 | return -EACCES; | |
331 | return ata_task_ioctl(scsidev, arg); | |
332 | ||
333 | default: | |
334 | rc = -ENOTTY; | |
335 | break; | |
336 | } | |
337 | ||
338 | return rc; | |
339 | } | |
340 | ||
341 | /** | |
342 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
343 | * @dev: ATA device to which the new command is attached | |
344 | * @cmd: SCSI command that originated this ATA command | |
345 | * @done: SCSI command completion function | |
346 | * | |
347 | * Obtain a reference to an unused ata_queued_cmd structure, | |
348 | * which is the basic libata structure representing a single | |
349 | * ATA command sent to the hardware. | |
350 | * | |
351 | * If a command was available, fill in the SCSI-specific | |
352 | * portions of the structure with information on the | |
353 | * current command. | |
354 | * | |
355 | * LOCKING: | |
356 | * spin_lock_irqsave(host lock) | |
357 | * | |
358 | * RETURNS: | |
359 | * Command allocated, or %NULL if none available. | |
360 | */ | |
361 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, | |
362 | struct scsi_cmnd *cmd, | |
363 | void (*done)(struct scsi_cmnd *)) | |
364 | { | |
365 | struct ata_queued_cmd *qc; | |
366 | ||
367 | qc = ata_qc_new_init(dev); | |
368 | if (qc) { | |
369 | qc->scsicmd = cmd; | |
370 | qc->scsidone = done; | |
371 | ||
372 | if (cmd->use_sg) { | |
373 | qc->__sg = (struct scatterlist *) cmd->request_buffer; | |
374 | qc->n_elem = cmd->use_sg; | |
375 | } else { | |
376 | qc->__sg = &qc->sgent; | |
377 | qc->n_elem = 1; | |
378 | } | |
379 | } else { | |
380 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
381 | done(cmd); | |
382 | } | |
383 | ||
384 | return qc; | |
385 | } | |
386 | ||
387 | /** | |
388 | * ata_dump_status - user friendly display of error info | |
389 | * @id: id of the port in question | |
390 | * @tf: ptr to filled out taskfile | |
391 | * | |
392 | * Decode and dump the ATA error/status registers for the user so | |
393 | * that they have some idea what really happened at the non | |
394 | * make-believe layer. | |
395 | * | |
396 | * LOCKING: | |
397 | * inherited from caller | |
398 | */ | |
399 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
400 | { | |
401 | u8 stat = tf->command, err = tf->feature; | |
402 | ||
403 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
404 | if (stat & ATA_BUSY) { | |
405 | printk("Busy }\n"); /* Data is not valid in this case */ | |
406 | } else { | |
407 | if (stat & 0x40) printk("DriveReady "); | |
408 | if (stat & 0x20) printk("DeviceFault "); | |
409 | if (stat & 0x10) printk("SeekComplete "); | |
410 | if (stat & 0x08) printk("DataRequest "); | |
411 | if (stat & 0x04) printk("CorrectedError "); | |
412 | if (stat & 0x02) printk("Index "); | |
413 | if (stat & 0x01) printk("Error "); | |
414 | printk("}\n"); | |
415 | ||
416 | if (err) { | |
417 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
418 | if (err & 0x04) printk("DriveStatusError "); | |
419 | if (err & 0x80) { | |
420 | if (err & 0x04) printk("BadCRC "); | |
421 | else printk("Sector "); | |
422 | } | |
423 | if (err & 0x40) printk("UncorrectableError "); | |
424 | if (err & 0x10) printk("SectorIdNotFound "); | |
425 | if (err & 0x02) printk("TrackZeroNotFound "); | |
426 | if (err & 0x01) printk("AddrMarkNotFound "); | |
427 | printk("}\n"); | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | /** | |
433 | * ata_scsi_device_suspend - suspend ATA device associated with sdev | |
434 | * @sdev: the SCSI device to suspend | |
435 | * @mesg: target power management message | |
436 | * | |
437 | * Request suspend EH action on the ATA device associated with | |
438 | * @sdev and wait for the operation to complete. | |
439 | * | |
440 | * LOCKING: | |
441 | * Kernel thread context (may sleep). | |
442 | * | |
443 | * RETURNS: | |
444 | * 0 on success, -errno otherwise. | |
445 | */ | |
446 | int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg) | |
447 | { | |
448 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
449 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
450 | unsigned long flags; | |
451 | unsigned int action; | |
452 | int rc = 0; | |
453 | ||
454 | if (!dev) | |
455 | goto out; | |
456 | ||
457 | spin_lock_irqsave(ap->lock, flags); | |
458 | ||
459 | /* wait for the previous resume to complete */ | |
460 | while (dev->flags & ATA_DFLAG_SUSPENDED) { | |
461 | spin_unlock_irqrestore(ap->lock, flags); | |
462 | ata_port_wait_eh(ap); | |
463 | spin_lock_irqsave(ap->lock, flags); | |
464 | } | |
465 | ||
466 | /* if @sdev is already detached, nothing to do */ | |
467 | if (sdev->sdev_state == SDEV_OFFLINE || | |
468 | sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) | |
469 | goto out_unlock; | |
470 | ||
471 | /* request suspend */ | |
472 | action = ATA_EH_SUSPEND; | |
473 | if (mesg.event != PM_EVENT_SUSPEND) | |
474 | action |= ATA_EH_PM_FREEZE; | |
475 | ap->eh_info.dev_action[dev->devno] |= action; | |
476 | ap->eh_info.flags |= ATA_EHI_QUIET; | |
477 | ata_port_schedule_eh(ap); | |
478 | ||
479 | spin_unlock_irqrestore(ap->lock, flags); | |
480 | ||
481 | /* wait for EH to do the job */ | |
482 | ata_port_wait_eh(ap); | |
483 | ||
484 | spin_lock_irqsave(ap->lock, flags); | |
485 | ||
486 | /* If @sdev is still attached but the associated ATA device | |
487 | * isn't suspended, the operation failed. | |
488 | */ | |
489 | if (sdev->sdev_state != SDEV_OFFLINE && | |
490 | sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL && | |
491 | !(dev->flags & ATA_DFLAG_SUSPENDED)) | |
492 | rc = -EIO; | |
493 | ||
494 | out_unlock: | |
495 | spin_unlock_irqrestore(ap->lock, flags); | |
496 | out: | |
497 | if (rc == 0) | |
498 | sdev->sdev_gendev.power.power_state = mesg; | |
499 | return rc; | |
500 | } | |
501 | ||
502 | /** | |
503 | * ata_scsi_device_resume - resume ATA device associated with sdev | |
504 | * @sdev: the SCSI device to resume | |
505 | * | |
506 | * Request resume EH action on the ATA device associated with | |
507 | * @sdev and return immediately. This enables parallel | |
508 | * wakeup/spinup of devices. | |
509 | * | |
510 | * LOCKING: | |
511 | * Kernel thread context (may sleep). | |
512 | * | |
513 | * RETURNS: | |
514 | * 0. | |
515 | */ | |
516 | int ata_scsi_device_resume(struct scsi_device *sdev) | |
517 | { | |
518 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
519 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); | |
520 | struct ata_eh_info *ehi = &ap->eh_info; | |
521 | unsigned long flags; | |
522 | unsigned int action; | |
523 | ||
524 | if (!dev) | |
525 | goto out; | |
526 | ||
527 | spin_lock_irqsave(ap->lock, flags); | |
528 | ||
529 | /* if @sdev is already detached, nothing to do */ | |
530 | if (sdev->sdev_state == SDEV_OFFLINE || | |
531 | sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) | |
532 | goto out_unlock; | |
533 | ||
534 | /* request resume */ | |
535 | action = ATA_EH_RESUME; | |
536 | if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND) | |
537 | __ata_ehi_hotplugged(ehi); | |
538 | else | |
539 | action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET; | |
540 | ehi->dev_action[dev->devno] |= action; | |
541 | ||
542 | /* We don't want autopsy and verbose EH messages. Disable | |
543 | * those if we're the only device on this link. | |
544 | */ | |
545 | if (ata_port_max_devices(ap) == 1) | |
546 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
547 | ||
548 | ata_port_schedule_eh(ap); | |
549 | ||
550 | out_unlock: | |
551 | spin_unlock_irqrestore(ap->lock, flags); | |
552 | out: | |
553 | sdev->sdev_gendev.power.power_state = PMSG_ON; | |
554 | return 0; | |
555 | } | |
556 | ||
557 | /** | |
558 | * ata_to_sense_error - convert ATA error to SCSI error | |
559 | * @id: ATA device number | |
560 | * @drv_stat: value contained in ATA status register | |
561 | * @drv_err: value contained in ATA error register | |
562 | * @sk: the sense key we'll fill out | |
563 | * @asc: the additional sense code we'll fill out | |
564 | * @ascq: the additional sense code qualifier we'll fill out | |
565 | * @verbose: be verbose | |
566 | * | |
567 | * Converts an ATA error into a SCSI error. Fill out pointers to | |
568 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
569 | * format sense blocks. | |
570 | * | |
571 | * LOCKING: | |
572 | * spin_lock_irqsave(host lock) | |
573 | */ | |
574 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, | |
575 | u8 *ascq, int verbose) | |
576 | { | |
577 | int i; | |
578 | ||
579 | /* Based on the 3ware driver translation table */ | |
580 | static const unsigned char sense_table[][4] = { | |
581 | /* BBD|ECC|ID|MAR */ | |
582 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
583 | /* BBD|ECC|ID */ | |
584 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
585 | /* ECC|MC|MARK */ | |
586 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
587 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
588 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
589 | /* MC|ID|ABRT|TRK0|MARK */ | |
590 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
591 | /* MCR|MARK */ | |
592 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
593 | /* Bad address mark */ | |
594 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
595 | /* TRK0 */ | |
596 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
597 | /* Abort & !ICRC */ | |
598 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
599 | /* Media change request */ | |
600 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
601 | /* SRV */ | |
602 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
603 | /* Media change */ | |
604 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
605 | /* ECC */ | |
606 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
607 | /* BBD - block marked bad */ | |
608 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
609 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
610 | }; | |
611 | static const unsigned char stat_table[][4] = { | |
612 | /* Must be first because BUSY means no other bits valid */ | |
613 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
614 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
615 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
616 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
617 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
618 | }; | |
619 | ||
620 | /* | |
621 | * Is this an error we can process/parse | |
622 | */ | |
623 | if (drv_stat & ATA_BUSY) { | |
624 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
625 | } | |
626 | ||
627 | if (drv_err) { | |
628 | /* Look for drv_err */ | |
629 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
630 | /* Look for best matches first */ | |
631 | if ((sense_table[i][0] & drv_err) == | |
632 | sense_table[i][0]) { | |
633 | *sk = sense_table[i][1]; | |
634 | *asc = sense_table[i][2]; | |
635 | *ascq = sense_table[i][3]; | |
636 | goto translate_done; | |
637 | } | |
638 | } | |
639 | /* No immediate match */ | |
640 | if (verbose) | |
641 | printk(KERN_WARNING "ata%u: no sense translation for " | |
642 | "error 0x%02x\n", id, drv_err); | |
643 | } | |
644 | ||
645 | /* Fall back to interpreting status bits */ | |
646 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
647 | if (stat_table[i][0] & drv_stat) { | |
648 | *sk = stat_table[i][1]; | |
649 | *asc = stat_table[i][2]; | |
650 | *ascq = stat_table[i][3]; | |
651 | goto translate_done; | |
652 | } | |
653 | } | |
654 | /* No error? Undecoded? */ | |
655 | if (verbose) | |
656 | printk(KERN_WARNING "ata%u: no sense translation for " | |
657 | "status: 0x%02x\n", id, drv_stat); | |
658 | ||
659 | /* We need a sensible error return here, which is tricky, and one | |
660 | that won't cause people to do things like return a disk wrongly */ | |
661 | *sk = ABORTED_COMMAND; | |
662 | *asc = 0x00; | |
663 | *ascq = 0x00; | |
664 | ||
665 | translate_done: | |
666 | if (verbose) | |
667 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
668 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
669 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
670 | return; | |
671 | } | |
672 | ||
673 | /* | |
674 | * ata_gen_ata_desc_sense - Generate check condition sense block. | |
675 | * @qc: Command that completed. | |
676 | * | |
677 | * This function is specific to the ATA descriptor format sense | |
678 | * block specified for the ATA pass through commands. Regardless | |
679 | * of whether the command errored or not, return a sense | |
680 | * block. Copy all controller registers into the sense | |
681 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
682 | * | |
683 | * LOCKING: | |
684 | * spin_lock_irqsave(host lock) | |
685 | */ | |
686 | void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) | |
687 | { | |
688 | struct scsi_cmnd *cmd = qc->scsicmd; | |
689 | struct ata_taskfile *tf = &qc->result_tf; | |
690 | unsigned char *sb = cmd->sense_buffer; | |
691 | unsigned char *desc = sb + 8; | |
692 | int verbose = qc->ap->ops->error_handler == NULL; | |
693 | ||
694 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
695 | ||
696 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
697 | ||
698 | /* | |
699 | * Use ata_to_sense_error() to map status register bits | |
700 | * onto sense key, asc & ascq. | |
701 | */ | |
702 | if (qc->err_mask || | |
703 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
704 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, | |
705 | &sb[1], &sb[2], &sb[3], verbose); | |
706 | sb[1] &= 0x0f; | |
707 | } | |
708 | ||
709 | /* | |
710 | * Sense data is current and format is descriptor. | |
711 | */ | |
712 | sb[0] = 0x72; | |
713 | ||
714 | desc[0] = 0x09; | |
715 | ||
716 | /* | |
717 | * Set length of additional sense data. | |
718 | * Since we only populate descriptor 0, the total | |
719 | * length is the same (fixed) length as descriptor 0. | |
720 | */ | |
721 | desc[1] = sb[7] = 14; | |
722 | ||
723 | /* | |
724 | * Copy registers into sense buffer. | |
725 | */ | |
726 | desc[2] = 0x00; | |
727 | desc[3] = tf->feature; /* == error reg */ | |
728 | desc[5] = tf->nsect; | |
729 | desc[7] = tf->lbal; | |
730 | desc[9] = tf->lbam; | |
731 | desc[11] = tf->lbah; | |
732 | desc[12] = tf->device; | |
733 | desc[13] = tf->command; /* == status reg */ | |
734 | ||
735 | /* | |
736 | * Fill in Extend bit, and the high order bytes | |
737 | * if applicable. | |
738 | */ | |
739 | if (tf->flags & ATA_TFLAG_LBA48) { | |
740 | desc[2] |= 0x01; | |
741 | desc[4] = tf->hob_nsect; | |
742 | desc[6] = tf->hob_lbal; | |
743 | desc[8] = tf->hob_lbam; | |
744 | desc[10] = tf->hob_lbah; | |
745 | } | |
746 | } | |
747 | ||
748 | /** | |
749 | * ata_gen_fixed_sense - generate a SCSI fixed sense block | |
750 | * @qc: Command that we are erroring out | |
751 | * | |
752 | * Leverage ata_to_sense_error() to give us the codes. Fit our | |
753 | * LBA in here if there's room. | |
754 | * | |
755 | * LOCKING: | |
756 | * inherited from caller | |
757 | */ | |
758 | void ata_gen_fixed_sense(struct ata_queued_cmd *qc) | |
759 | { | |
760 | struct scsi_cmnd *cmd = qc->scsicmd; | |
761 | struct ata_taskfile *tf = &qc->result_tf; | |
762 | unsigned char *sb = cmd->sense_buffer; | |
763 | int verbose = qc->ap->ops->error_handler == NULL; | |
764 | ||
765 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
766 | ||
767 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
768 | ||
769 | /* | |
770 | * Use ata_to_sense_error() to map status register bits | |
771 | * onto sense key, asc & ascq. | |
772 | */ | |
773 | if (qc->err_mask || | |
774 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
775 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, | |
776 | &sb[2], &sb[12], &sb[13], verbose); | |
777 | sb[2] &= 0x0f; | |
778 | } | |
779 | ||
780 | sb[0] = 0x70; | |
781 | sb[7] = 0x0a; | |
782 | ||
783 | if (tf->flags & ATA_TFLAG_LBA48) { | |
784 | /* TODO: find solution for LBA48 descriptors */ | |
785 | } | |
786 | ||
787 | else if (tf->flags & ATA_TFLAG_LBA) { | |
788 | /* A small (28b) LBA will fit in the 32b info field */ | |
789 | sb[0] |= 0x80; /* set valid bit */ | |
790 | sb[3] = tf->device & 0x0f; | |
791 | sb[4] = tf->lbah; | |
792 | sb[5] = tf->lbam; | |
793 | sb[6] = tf->lbal; | |
794 | } | |
795 | ||
796 | else { | |
797 | /* TODO: C/H/S */ | |
798 | } | |
799 | } | |
800 | ||
801 | static void ata_scsi_sdev_config(struct scsi_device *sdev) | |
802 | { | |
803 | sdev->use_10_for_rw = 1; | |
804 | sdev->use_10_for_ms = 1; | |
805 | } | |
806 | ||
807 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
808 | struct ata_device *dev) | |
809 | { | |
810 | unsigned int max_sectors; | |
811 | ||
812 | /* TODO: 2048 is an arbitrary number, not the | |
813 | * hardware maximum. This should be increased to | |
814 | * 65534 when Jens Axboe's patch for dynamically | |
815 | * determining max_sectors is merged. | |
816 | */ | |
817 | max_sectors = ATA_MAX_SECTORS; | |
818 | if (dev->flags & ATA_DFLAG_LBA48) | |
819 | max_sectors = ATA_MAX_SECTORS_LBA48; | |
820 | if (dev->max_sectors) | |
821 | max_sectors = dev->max_sectors; | |
822 | ||
823 | blk_queue_max_sectors(sdev->request_queue, max_sectors); | |
824 | ||
825 | /* | |
826 | * SATA DMA transfers must be multiples of 4 byte, so | |
827 | * we need to pad ATAPI transfers using an extra sg. | |
828 | * Decrement max hw segments accordingly. | |
829 | */ | |
830 | if (dev->class == ATA_DEV_ATAPI) { | |
831 | request_queue_t *q = sdev->request_queue; | |
832 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); | |
833 | } | |
834 | ||
835 | if (dev->flags & ATA_DFLAG_NCQ) { | |
836 | int depth; | |
837 | ||
838 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
839 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
840 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
841 | } | |
842 | } | |
843 | ||
844 | /** | |
845 | * ata_scsi_slave_config - Set SCSI device attributes | |
846 | * @sdev: SCSI device to examine | |
847 | * | |
848 | * This is called before we actually start reading | |
849 | * and writing to the device, to configure certain | |
850 | * SCSI mid-layer behaviors. | |
851 | * | |
852 | * LOCKING: | |
853 | * Defined by SCSI layer. We don't really care. | |
854 | */ | |
855 | ||
856 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
857 | { | |
858 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
859 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
860 | ||
861 | ata_scsi_sdev_config(sdev); | |
862 | ||
863 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
864 | ||
865 | if (dev) | |
866 | ata_scsi_dev_config(sdev, dev); | |
867 | ||
868 | return 0; /* scsi layer doesn't check return value, sigh */ | |
869 | } | |
870 | ||
871 | /** | |
872 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
873 | * @sdev: SCSI device to be destroyed | |
874 | * | |
875 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
876 | * this unplugging was initiated by libata as indicated by NULL | |
877 | * dev->sdev, this function doesn't have to do anything. | |
878 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
879 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
880 | * EH. | |
881 | * | |
882 | * LOCKING: | |
883 | * Defined by SCSI layer. We don't really care. | |
884 | */ | |
885 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
886 | { | |
887 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
888 | unsigned long flags; | |
889 | struct ata_device *dev; | |
890 | ||
891 | if (!ap->ops->error_handler) | |
892 | return; | |
893 | ||
894 | spin_lock_irqsave(ap->lock, flags); | |
895 | dev = __ata_scsi_find_dev(ap, sdev); | |
896 | if (dev && dev->sdev) { | |
897 | /* SCSI device already in CANCEL state, no need to offline it */ | |
898 | dev->sdev = NULL; | |
899 | dev->flags |= ATA_DFLAG_DETACH; | |
900 | ata_port_schedule_eh(ap); | |
901 | } | |
902 | spin_unlock_irqrestore(ap->lock, flags); | |
903 | } | |
904 | ||
905 | /** | |
906 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
907 | * @sdev: SCSI device to configure queue depth for | |
908 | * @queue_depth: new queue depth | |
909 | * | |
910 | * This is libata standard hostt->change_queue_depth callback. | |
911 | * SCSI will call into this callback when user tries to set queue | |
912 | * depth via sysfs. | |
913 | * | |
914 | * LOCKING: | |
915 | * SCSI layer (we don't care) | |
916 | * | |
917 | * RETURNS: | |
918 | * Newly configured queue depth. | |
919 | */ | |
920 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
921 | { | |
922 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
923 | struct ata_device *dev; | |
924 | unsigned long flags; | |
925 | int max_depth; | |
926 | ||
927 | if (queue_depth < 1) | |
928 | return sdev->queue_depth; | |
929 | ||
930 | dev = ata_scsi_find_dev(ap, sdev); | |
931 | if (!dev || !ata_dev_enabled(dev)) | |
932 | return sdev->queue_depth; | |
933 | ||
934 | max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
935 | max_depth = min(ATA_MAX_QUEUE - 1, max_depth); | |
936 | if (queue_depth > max_depth) | |
937 | queue_depth = max_depth; | |
938 | ||
939 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
940 | ||
941 | spin_lock_irqsave(ap->lock, flags); | |
942 | if (queue_depth > 1) | |
943 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; | |
944 | else | |
945 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
946 | spin_unlock_irqrestore(ap->lock, flags); | |
947 | ||
948 | return queue_depth; | |
949 | } | |
950 | ||
951 | /** | |
952 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
953 | * @qc: Storage for translated ATA taskfile | |
954 | * @scsicmd: SCSI command to translate | |
955 | * | |
956 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
957 | * (to start). Perhaps these commands should be preceded by | |
958 | * CHECK POWER MODE to see what power mode the device is already in. | |
959 | * [See SAT revision 5 at www.t10.org] | |
960 | * | |
961 | * LOCKING: | |
962 | * spin_lock_irqsave(host lock) | |
963 | * | |
964 | * RETURNS: | |
965 | * Zero on success, non-zero on error. | |
966 | */ | |
967 | ||
968 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, | |
969 | const u8 *scsicmd) | |
970 | { | |
971 | struct ata_taskfile *tf = &qc->tf; | |
972 | ||
973 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
974 | tf->protocol = ATA_PROT_NODATA; | |
975 | if (scsicmd[1] & 0x1) { | |
976 | ; /* ignore IMMED bit, violates sat-r05 */ | |
977 | } | |
978 | if (scsicmd[4] & 0x2) | |
979 | goto invalid_fld; /* LOEJ bit set not supported */ | |
980 | if (((scsicmd[4] >> 4) & 0xf) != 0) | |
981 | goto invalid_fld; /* power conditions not supported */ | |
982 | if (scsicmd[4] & 0x1) { | |
983 | tf->nsect = 1; /* 1 sector, lba=0 */ | |
984 | ||
985 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
986 | tf->flags |= ATA_TFLAG_LBA; | |
987 | ||
988 | tf->lbah = 0x0; | |
989 | tf->lbam = 0x0; | |
990 | tf->lbal = 0x0; | |
991 | tf->device |= ATA_LBA; | |
992 | } else { | |
993 | /* CHS */ | |
994 | tf->lbal = 0x1; /* sect */ | |
995 | tf->lbam = 0x0; /* cyl low */ | |
996 | tf->lbah = 0x0; /* cyl high */ | |
997 | } | |
998 | ||
999 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ | |
1000 | } else { | |
1001 | tf->nsect = 0; /* time period value (0 implies now) */ | |
1002 | tf->command = ATA_CMD_STANDBY; | |
1003 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
1004 | } | |
1005 | /* | |
1006 | * Standby and Idle condition timers could be implemented but that | |
1007 | * would require libata to implement the Power condition mode page | |
1008 | * and allow the user to change it. Changing mode pages requires | |
1009 | * MODE SELECT to be implemented. | |
1010 | */ | |
1011 | ||
1012 | return 0; | |
1013 | ||
1014 | invalid_fld: | |
1015 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1016 | /* "Invalid field in cbd" */ | |
1017 | return 1; | |
1018 | } | |
1019 | ||
1020 | ||
1021 | /** | |
1022 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1023 | * @qc: Storage for translated ATA taskfile | |
1024 | * @scsicmd: SCSI command to translate (ignored) | |
1025 | * | |
1026 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1027 | * FLUSH CACHE EXT. | |
1028 | * | |
1029 | * LOCKING: | |
1030 | * spin_lock_irqsave(host lock) | |
1031 | * | |
1032 | * RETURNS: | |
1033 | * Zero on success, non-zero on error. | |
1034 | */ | |
1035 | ||
1036 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) | |
1037 | { | |
1038 | struct ata_taskfile *tf = &qc->tf; | |
1039 | ||
1040 | tf->flags |= ATA_TFLAG_DEVICE; | |
1041 | tf->protocol = ATA_PROT_NODATA; | |
1042 | ||
1043 | if ((qc->dev->flags & ATA_DFLAG_LBA48) && | |
1044 | (ata_id_has_flush_ext(qc->dev->id))) | |
1045 | tf->command = ATA_CMD_FLUSH_EXT; | |
1046 | else | |
1047 | tf->command = ATA_CMD_FLUSH; | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * scsi_6_lba_len - Get LBA and transfer length | |
1054 | * @scsicmd: SCSI command to translate | |
1055 | * | |
1056 | * Calculate LBA and transfer length for 6-byte commands. | |
1057 | * | |
1058 | * RETURNS: | |
1059 | * @plba: the LBA | |
1060 | * @plen: the transfer length | |
1061 | */ | |
1062 | ||
1063 | static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) | |
1064 | { | |
1065 | u64 lba = 0; | |
1066 | u32 len = 0; | |
1067 | ||
1068 | VPRINTK("six-byte command\n"); | |
1069 | ||
1070 | lba |= ((u64)scsicmd[2]) << 8; | |
1071 | lba |= ((u64)scsicmd[3]); | |
1072 | ||
1073 | len |= ((u32)scsicmd[4]); | |
1074 | ||
1075 | *plba = lba; | |
1076 | *plen = len; | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * scsi_10_lba_len - Get LBA and transfer length | |
1081 | * @scsicmd: SCSI command to translate | |
1082 | * | |
1083 | * Calculate LBA and transfer length for 10-byte commands. | |
1084 | * | |
1085 | * RETURNS: | |
1086 | * @plba: the LBA | |
1087 | * @plen: the transfer length | |
1088 | */ | |
1089 | ||
1090 | static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) | |
1091 | { | |
1092 | u64 lba = 0; | |
1093 | u32 len = 0; | |
1094 | ||
1095 | VPRINTK("ten-byte command\n"); | |
1096 | ||
1097 | lba |= ((u64)scsicmd[2]) << 24; | |
1098 | lba |= ((u64)scsicmd[3]) << 16; | |
1099 | lba |= ((u64)scsicmd[4]) << 8; | |
1100 | lba |= ((u64)scsicmd[5]); | |
1101 | ||
1102 | len |= ((u32)scsicmd[7]) << 8; | |
1103 | len |= ((u32)scsicmd[8]); | |
1104 | ||
1105 | *plba = lba; | |
1106 | *plen = len; | |
1107 | } | |
1108 | ||
1109 | /** | |
1110 | * scsi_16_lba_len - Get LBA and transfer length | |
1111 | * @scsicmd: SCSI command to translate | |
1112 | * | |
1113 | * Calculate LBA and transfer length for 16-byte commands. | |
1114 | * | |
1115 | * RETURNS: | |
1116 | * @plba: the LBA | |
1117 | * @plen: the transfer length | |
1118 | */ | |
1119 | ||
1120 | static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) | |
1121 | { | |
1122 | u64 lba = 0; | |
1123 | u32 len = 0; | |
1124 | ||
1125 | VPRINTK("sixteen-byte command\n"); | |
1126 | ||
1127 | lba |= ((u64)scsicmd[2]) << 56; | |
1128 | lba |= ((u64)scsicmd[3]) << 48; | |
1129 | lba |= ((u64)scsicmd[4]) << 40; | |
1130 | lba |= ((u64)scsicmd[5]) << 32; | |
1131 | lba |= ((u64)scsicmd[6]) << 24; | |
1132 | lba |= ((u64)scsicmd[7]) << 16; | |
1133 | lba |= ((u64)scsicmd[8]) << 8; | |
1134 | lba |= ((u64)scsicmd[9]); | |
1135 | ||
1136 | len |= ((u32)scsicmd[10]) << 24; | |
1137 | len |= ((u32)scsicmd[11]) << 16; | |
1138 | len |= ((u32)scsicmd[12]) << 8; | |
1139 | len |= ((u32)scsicmd[13]); | |
1140 | ||
1141 | *plba = lba; | |
1142 | *plen = len; | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1147 | * @qc: Storage for translated ATA taskfile | |
1148 | * @scsicmd: SCSI command to translate | |
1149 | * | |
1150 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1151 | * | |
1152 | * LOCKING: | |
1153 | * spin_lock_irqsave(host lock) | |
1154 | * | |
1155 | * RETURNS: | |
1156 | * Zero on success, non-zero on error. | |
1157 | */ | |
1158 | ||
1159 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) | |
1160 | { | |
1161 | struct ata_taskfile *tf = &qc->tf; | |
1162 | struct ata_device *dev = qc->dev; | |
1163 | u64 dev_sectors = qc->dev->n_sectors; | |
1164 | u64 block; | |
1165 | u32 n_block; | |
1166 | ||
1167 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1168 | tf->protocol = ATA_PROT_NODATA; | |
1169 | ||
1170 | if (scsicmd[0] == VERIFY) | |
1171 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
1172 | else if (scsicmd[0] == VERIFY_16) | |
1173 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1174 | else | |
1175 | goto invalid_fld; | |
1176 | ||
1177 | if (!n_block) | |
1178 | goto nothing_to_do; | |
1179 | if (block >= dev_sectors) | |
1180 | goto out_of_range; | |
1181 | if ((block + n_block) > dev_sectors) | |
1182 | goto out_of_range; | |
1183 | ||
1184 | if (dev->flags & ATA_DFLAG_LBA) { | |
1185 | tf->flags |= ATA_TFLAG_LBA; | |
1186 | ||
1187 | if (lba_28_ok(block, n_block)) { | |
1188 | /* use LBA28 */ | |
1189 | tf->command = ATA_CMD_VERIFY; | |
1190 | tf->device |= (block >> 24) & 0xf; | |
1191 | } else if (lba_48_ok(block, n_block)) { | |
1192 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1193 | goto out_of_range; | |
1194 | ||
1195 | /* use LBA48 */ | |
1196 | tf->flags |= ATA_TFLAG_LBA48; | |
1197 | tf->command = ATA_CMD_VERIFY_EXT; | |
1198 | ||
1199 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
1200 | ||
1201 | tf->hob_lbah = (block >> 40) & 0xff; | |
1202 | tf->hob_lbam = (block >> 32) & 0xff; | |
1203 | tf->hob_lbal = (block >> 24) & 0xff; | |
1204 | } else | |
1205 | /* request too large even for LBA48 */ | |
1206 | goto out_of_range; | |
1207 | ||
1208 | tf->nsect = n_block & 0xff; | |
1209 | ||
1210 | tf->lbah = (block >> 16) & 0xff; | |
1211 | tf->lbam = (block >> 8) & 0xff; | |
1212 | tf->lbal = block & 0xff; | |
1213 | ||
1214 | tf->device |= ATA_LBA; | |
1215 | } else { | |
1216 | /* CHS */ | |
1217 | u32 sect, head, cyl, track; | |
1218 | ||
1219 | if (!lba_28_ok(block, n_block)) | |
1220 | goto out_of_range; | |
1221 | ||
1222 | /* Convert LBA to CHS */ | |
1223 | track = (u32)block / dev->sectors; | |
1224 | cyl = track / dev->heads; | |
1225 | head = track % dev->heads; | |
1226 | sect = (u32)block % dev->sectors + 1; | |
1227 | ||
1228 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
1229 | (u32)block, track, cyl, head, sect); | |
1230 | ||
1231 | /* Check whether the converted CHS can fit. | |
1232 | Cylinder: 0-65535 | |
1233 | Head: 0-15 | |
1234 | Sector: 1-255*/ | |
1235 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
1236 | goto out_of_range; | |
1237 | ||
1238 | tf->command = ATA_CMD_VERIFY; | |
1239 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1240 | tf->lbal = sect; | |
1241 | tf->lbam = cyl; | |
1242 | tf->lbah = cyl >> 8; | |
1243 | tf->device |= head; | |
1244 | } | |
1245 | ||
1246 | return 0; | |
1247 | ||
1248 | invalid_fld: | |
1249 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1250 | /* "Invalid field in cbd" */ | |
1251 | return 1; | |
1252 | ||
1253 | out_of_range: | |
1254 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1255 | /* "Logical Block Address out of range" */ | |
1256 | return 1; | |
1257 | ||
1258 | nothing_to_do: | |
1259 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1260 | return 1; | |
1261 | } | |
1262 | ||
1263 | /** | |
1264 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1265 | * @qc: Storage for translated ATA taskfile | |
1266 | * @scsicmd: SCSI command to translate | |
1267 | * | |
1268 | * Converts any of six SCSI read/write commands into the | |
1269 | * ATA counterpart, including starting sector (LBA), | |
1270 | * sector count, and taking into account the device's LBA48 | |
1271 | * support. | |
1272 | * | |
1273 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1274 | * %WRITE_16 are currently supported. | |
1275 | * | |
1276 | * LOCKING: | |
1277 | * spin_lock_irqsave(host lock) | |
1278 | * | |
1279 | * RETURNS: | |
1280 | * Zero on success, non-zero on error. | |
1281 | */ | |
1282 | ||
1283 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) | |
1284 | { | |
1285 | struct ata_taskfile *tf = &qc->tf; | |
1286 | struct ata_device *dev = qc->dev; | |
1287 | u64 block; | |
1288 | u32 n_block; | |
1289 | ||
1290 | qc->flags |= ATA_QCFLAG_IO; | |
1291 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1292 | ||
1293 | if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || | |
1294 | scsicmd[0] == WRITE_16) | |
1295 | tf->flags |= ATA_TFLAG_WRITE; | |
1296 | ||
1297 | /* Calculate the SCSI LBA, transfer length and FUA. */ | |
1298 | switch (scsicmd[0]) { | |
1299 | case READ_10: | |
1300 | case WRITE_10: | |
1301 | scsi_10_lba_len(scsicmd, &block, &n_block); | |
1302 | if (unlikely(scsicmd[1] & (1 << 3))) | |
1303 | tf->flags |= ATA_TFLAG_FUA; | |
1304 | break; | |
1305 | case READ_6: | |
1306 | case WRITE_6: | |
1307 | scsi_6_lba_len(scsicmd, &block, &n_block); | |
1308 | ||
1309 | /* for 6-byte r/w commands, transfer length 0 | |
1310 | * means 256 blocks of data, not 0 block. | |
1311 | */ | |
1312 | if (!n_block) | |
1313 | n_block = 256; | |
1314 | break; | |
1315 | case READ_16: | |
1316 | case WRITE_16: | |
1317 | scsi_16_lba_len(scsicmd, &block, &n_block); | |
1318 | if (unlikely(scsicmd[1] & (1 << 3))) | |
1319 | tf->flags |= ATA_TFLAG_FUA; | |
1320 | break; | |
1321 | default: | |
1322 | DPRINTK("no-byte command\n"); | |
1323 | goto invalid_fld; | |
1324 | } | |
1325 | ||
1326 | /* Check and compose ATA command */ | |
1327 | if (!n_block) | |
1328 | /* For 10-byte and 16-byte SCSI R/W commands, transfer | |
1329 | * length 0 means transfer 0 block of data. | |
1330 | * However, for ATA R/W commands, sector count 0 means | |
1331 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
1332 | * | |
1333 | * WARNING: one or two older ATA drives treat 0 as 0... | |
1334 | */ | |
1335 | goto nothing_to_do; | |
1336 | ||
1337 | if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | | |
1338 | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) { | |
1339 | /* yay, NCQ */ | |
1340 | if (!lba_48_ok(block, n_block)) | |
1341 | goto out_of_range; | |
1342 | ||
1343 | tf->protocol = ATA_PROT_NCQ; | |
1344 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1345 | ||
1346 | if (tf->flags & ATA_TFLAG_WRITE) | |
1347 | tf->command = ATA_CMD_FPDMA_WRITE; | |
1348 | else | |
1349 | tf->command = ATA_CMD_FPDMA_READ; | |
1350 | ||
1351 | qc->nsect = n_block; | |
1352 | ||
1353 | tf->nsect = qc->tag << 3; | |
1354 | tf->hob_feature = (n_block >> 8) & 0xff; | |
1355 | tf->feature = n_block & 0xff; | |
1356 | ||
1357 | tf->hob_lbah = (block >> 40) & 0xff; | |
1358 | tf->hob_lbam = (block >> 32) & 0xff; | |
1359 | tf->hob_lbal = (block >> 24) & 0xff; | |
1360 | tf->lbah = (block >> 16) & 0xff; | |
1361 | tf->lbam = (block >> 8) & 0xff; | |
1362 | tf->lbal = block & 0xff; | |
1363 | ||
1364 | tf->device = 1 << 6; | |
1365 | if (tf->flags & ATA_TFLAG_FUA) | |
1366 | tf->device |= 1 << 7; | |
1367 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
1368 | tf->flags |= ATA_TFLAG_LBA; | |
1369 | ||
1370 | if (lba_28_ok(block, n_block)) { | |
1371 | /* use LBA28 */ | |
1372 | tf->device |= (block >> 24) & 0xf; | |
1373 | } else if (lba_48_ok(block, n_block)) { | |
1374 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1375 | goto out_of_range; | |
1376 | ||
1377 | /* use LBA48 */ | |
1378 | tf->flags |= ATA_TFLAG_LBA48; | |
1379 | ||
1380 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
1381 | ||
1382 | tf->hob_lbah = (block >> 40) & 0xff; | |
1383 | tf->hob_lbam = (block >> 32) & 0xff; | |
1384 | tf->hob_lbal = (block >> 24) & 0xff; | |
1385 | } else | |
1386 | /* request too large even for LBA48 */ | |
1387 | goto out_of_range; | |
1388 | ||
1389 | if (unlikely(ata_rwcmd_protocol(qc) < 0)) | |
1390 | goto invalid_fld; | |
1391 | ||
1392 | qc->nsect = n_block; | |
1393 | tf->nsect = n_block & 0xff; | |
1394 | ||
1395 | tf->lbah = (block >> 16) & 0xff; | |
1396 | tf->lbam = (block >> 8) & 0xff; | |
1397 | tf->lbal = block & 0xff; | |
1398 | ||
1399 | tf->device |= ATA_LBA; | |
1400 | } else { | |
1401 | /* CHS */ | |
1402 | u32 sect, head, cyl, track; | |
1403 | ||
1404 | /* The request -may- be too large for CHS addressing. */ | |
1405 | if (!lba_28_ok(block, n_block)) | |
1406 | goto out_of_range; | |
1407 | ||
1408 | if (unlikely(ata_rwcmd_protocol(qc) < 0)) | |
1409 | goto invalid_fld; | |
1410 | ||
1411 | /* Convert LBA to CHS */ | |
1412 | track = (u32)block / dev->sectors; | |
1413 | cyl = track / dev->heads; | |
1414 | head = track % dev->heads; | |
1415 | sect = (u32)block % dev->sectors + 1; | |
1416 | ||
1417 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
1418 | (u32)block, track, cyl, head, sect); | |
1419 | ||
1420 | /* Check whether the converted CHS can fit. | |
1421 | Cylinder: 0-65535 | |
1422 | Head: 0-15 | |
1423 | Sector: 1-255*/ | |
1424 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
1425 | goto out_of_range; | |
1426 | ||
1427 | qc->nsect = n_block; | |
1428 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1429 | tf->lbal = sect; | |
1430 | tf->lbam = cyl; | |
1431 | tf->lbah = cyl >> 8; | |
1432 | tf->device |= head; | |
1433 | } | |
1434 | ||
1435 | return 0; | |
1436 | ||
1437 | invalid_fld: | |
1438 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
1439 | /* "Invalid field in cbd" */ | |
1440 | return 1; | |
1441 | ||
1442 | out_of_range: | |
1443 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); | |
1444 | /* "Logical Block Address out of range" */ | |
1445 | return 1; | |
1446 | ||
1447 | nothing_to_do: | |
1448 | qc->scsicmd->result = SAM_STAT_GOOD; | |
1449 | return 1; | |
1450 | } | |
1451 | ||
1452 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) | |
1453 | { | |
1454 | struct ata_port *ap = qc->ap; | |
1455 | struct scsi_cmnd *cmd = qc->scsicmd; | |
1456 | u8 *cdb = cmd->cmnd; | |
1457 | int need_sense = (qc->err_mask != 0); | |
1458 | ||
1459 | /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and | |
1460 | * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE | |
1461 | * cache | |
1462 | */ | |
1463 | if (ap->ops->error_handler && | |
1464 | !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) && | |
1465 | ((qc->tf.feature == SETFEATURES_WC_ON) || | |
1466 | (qc->tf.feature == SETFEATURES_WC_OFF))) { | |
1467 | ap->eh_info.action |= ATA_EH_REVALIDATE; | |
1468 | ata_port_schedule_eh(ap); | |
1469 | } | |
1470 | ||
1471 | /* For ATA pass thru (SAT) commands, generate a sense block if | |
1472 | * user mandated it or if there's an error. Note that if we | |
1473 | * generate because the user forced us to, a check condition | |
1474 | * is generated and the ATA register values are returned | |
1475 | * whether the command completed successfully or not. If there | |
1476 | * was no error, SK, ASC and ASCQ will all be zero. | |
1477 | */ | |
1478 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && | |
1479 | ((cdb[2] & 0x20) || need_sense)) { | |
1480 | ata_gen_ata_desc_sense(qc); | |
1481 | } else { | |
1482 | if (!need_sense) { | |
1483 | cmd->result = SAM_STAT_GOOD; | |
1484 | } else { | |
1485 | /* TODO: decide which descriptor format to use | |
1486 | * for 48b LBA devices and call that here | |
1487 | * instead of the fixed desc, which is only | |
1488 | * good for smaller LBA (and maybe CHS?) | |
1489 | * devices. | |
1490 | */ | |
1491 | ata_gen_fixed_sense(qc); | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | if (need_sense && !ap->ops->error_handler) | |
1496 | ata_dump_status(ap->id, &qc->result_tf); | |
1497 | ||
1498 | qc->scsidone(cmd); | |
1499 | ||
1500 | ata_qc_free(qc); | |
1501 | } | |
1502 | ||
1503 | /** | |
1504 | * ata_scmd_need_defer - Check whether we need to defer scmd | |
1505 | * @dev: ATA device to which the command is addressed | |
1506 | * @is_io: Is the command IO (and thus possibly NCQ)? | |
1507 | * | |
1508 | * NCQ and non-NCQ commands cannot run together. As upper layer | |
1509 | * only knows the queue depth, we are responsible for maintaining | |
1510 | * exclusion. This function checks whether a new command can be | |
1511 | * issued to @dev. | |
1512 | * | |
1513 | * LOCKING: | |
1514 | * spin_lock_irqsave(host lock) | |
1515 | * | |
1516 | * RETURNS: | |
1517 | * 1 if deferring is needed, 0 otherwise. | |
1518 | */ | |
1519 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) | |
1520 | { | |
1521 | struct ata_port *ap = dev->ap; | |
1522 | ||
1523 | if (!(dev->flags & ATA_DFLAG_NCQ)) | |
1524 | return 0; | |
1525 | ||
1526 | if (is_io) { | |
1527 | if (!ata_tag_valid(ap->active_tag)) | |
1528 | return 0; | |
1529 | } else { | |
1530 | if (!ata_tag_valid(ap->active_tag) && !ap->sactive) | |
1531 | return 0; | |
1532 | } | |
1533 | return 1; | |
1534 | } | |
1535 | ||
1536 | /** | |
1537 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1538 | * @dev: ATA device to which the command is addressed | |
1539 | * @cmd: SCSI command to execute | |
1540 | * @done: SCSI command completion function | |
1541 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1542 | * | |
1543 | * Our ->queuecommand() function has decided that the SCSI | |
1544 | * command issued can be directly translated into an ATA | |
1545 | * command, rather than handled internally. | |
1546 | * | |
1547 | * This function sets up an ata_queued_cmd structure for the | |
1548 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1549 | * | |
1550 | * The xlat_func argument (actor) returns 0 if ready to execute | |
1551 | * ATA command, else 1 to finish translation. If 1 is returned | |
1552 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1553 | * to be set reflecting an error condition or clean (early) | |
1554 | * termination. | |
1555 | * | |
1556 | * LOCKING: | |
1557 | * spin_lock_irqsave(host lock) | |
1558 | * | |
1559 | * RETURNS: | |
1560 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1561 | * needs to be deferred. | |
1562 | */ | |
1563 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, | |
1564 | void (*done)(struct scsi_cmnd *), | |
1565 | ata_xlat_func_t xlat_func) | |
1566 | { | |
1567 | struct ata_queued_cmd *qc; | |
1568 | u8 *scsicmd = cmd->cmnd; | |
1569 | int is_io = xlat_func == ata_scsi_rw_xlat; | |
1570 | ||
1571 | VPRINTK("ENTER\n"); | |
1572 | ||
1573 | if (unlikely(ata_scmd_need_defer(dev, is_io))) | |
1574 | goto defer; | |
1575 | ||
1576 | qc = ata_scsi_qc_new(dev, cmd, done); | |
1577 | if (!qc) | |
1578 | goto err_mem; | |
1579 | ||
1580 | /* data is present; dma-map it */ | |
1581 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || | |
1582 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1583 | if (unlikely(cmd->request_bufflen < 1)) { | |
1584 | ata_dev_printk(dev, KERN_WARNING, | |
1585 | "WARNING: zero len r/w req\n"); | |
1586 | goto err_did; | |
1587 | } | |
1588 | ||
1589 | if (cmd->use_sg) | |
1590 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1591 | else | |
1592 | ata_sg_init_one(qc, cmd->request_buffer, | |
1593 | cmd->request_bufflen); | |
1594 | ||
1595 | qc->dma_dir = cmd->sc_data_direction; | |
1596 | } | |
1597 | ||
1598 | qc->complete_fn = ata_scsi_qc_complete; | |
1599 | ||
1600 | if (xlat_func(qc, scsicmd)) | |
1601 | goto early_finish; | |
1602 | ||
1603 | /* select device, send command to hardware */ | |
1604 | ata_qc_issue(qc); | |
1605 | ||
1606 | VPRINTK("EXIT\n"); | |
1607 | return 0; | |
1608 | ||
1609 | early_finish: | |
1610 | ata_qc_free(qc); | |
1611 | done(cmd); | |
1612 | DPRINTK("EXIT - early finish (good or error)\n"); | |
1613 | return 0; | |
1614 | ||
1615 | err_did: | |
1616 | ata_qc_free(qc); | |
1617 | cmd->result = (DID_ERROR << 16); | |
1618 | done(cmd); | |
1619 | err_mem: | |
1620 | DPRINTK("EXIT - internal\n"); | |
1621 | return 0; | |
1622 | ||
1623 | defer: | |
1624 | DPRINTK("EXIT - defer\n"); | |
1625 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1626 | } | |
1627 | ||
1628 | /** | |
1629 | * ata_scsi_rbuf_get - Map response buffer. | |
1630 | * @cmd: SCSI command containing buffer to be mapped. | |
1631 | * @buf_out: Pointer to mapped area. | |
1632 | * | |
1633 | * Maps buffer contained within SCSI command @cmd. | |
1634 | * | |
1635 | * LOCKING: | |
1636 | * spin_lock_irqsave(host lock) | |
1637 | * | |
1638 | * RETURNS: | |
1639 | * Length of response buffer. | |
1640 | */ | |
1641 | ||
1642 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1643 | { | |
1644 | u8 *buf; | |
1645 | unsigned int buflen; | |
1646 | ||
1647 | if (cmd->use_sg) { | |
1648 | struct scatterlist *sg; | |
1649 | ||
1650 | sg = (struct scatterlist *) cmd->request_buffer; | |
1651 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; | |
1652 | buflen = sg->length; | |
1653 | } else { | |
1654 | buf = cmd->request_buffer; | |
1655 | buflen = cmd->request_bufflen; | |
1656 | } | |
1657 | ||
1658 | *buf_out = buf; | |
1659 | return buflen; | |
1660 | } | |
1661 | ||
1662 | /** | |
1663 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1664 | * @cmd: SCSI command containing buffer to be unmapped. | |
1665 | * @buf: buffer to unmap | |
1666 | * | |
1667 | * Unmaps response buffer contained within @cmd. | |
1668 | * | |
1669 | * LOCKING: | |
1670 | * spin_lock_irqsave(host lock) | |
1671 | */ | |
1672 | ||
1673 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1674 | { | |
1675 | if (cmd->use_sg) { | |
1676 | struct scatterlist *sg; | |
1677 | ||
1678 | sg = (struct scatterlist *) cmd->request_buffer; | |
1679 | kunmap_atomic(buf - sg->offset, KM_USER0); | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | /** | |
1684 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1685 | * @args: device IDENTIFY data / SCSI command of interest. | |
1686 | * @actor: Callback hook for desired SCSI command simulator | |
1687 | * | |
1688 | * Takes care of the hard work of simulating a SCSI command... | |
1689 | * Mapping the response buffer, calling the command's handler, | |
1690 | * and handling the handler's return value. This return value | |
1691 | * indicates whether the handler wishes the SCSI command to be | |
1692 | * completed successfully (0), or not (in which case cmd->result | |
1693 | * and sense buffer are assumed to be set). | |
1694 | * | |
1695 | * LOCKING: | |
1696 | * spin_lock_irqsave(host lock) | |
1697 | */ | |
1698 | ||
1699 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1700 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1701 | u8 *rbuf, unsigned int buflen)) | |
1702 | { | |
1703 | u8 *rbuf; | |
1704 | unsigned int buflen, rc; | |
1705 | struct scsi_cmnd *cmd = args->cmd; | |
1706 | ||
1707 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1708 | memset(rbuf, 0, buflen); | |
1709 | rc = actor(args, rbuf, buflen); | |
1710 | ata_scsi_rbuf_put(cmd, rbuf); | |
1711 | ||
1712 | if (rc == 0) | |
1713 | cmd->result = SAM_STAT_GOOD; | |
1714 | args->done(cmd); | |
1715 | } | |
1716 | ||
1717 | /** | |
1718 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1719 | * @args: device IDENTIFY data / SCSI command of interest. | |
1720 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1721 | * @buflen: Response buffer length. | |
1722 | * | |
1723 | * Returns standard device identification data associated | |
1724 | * with non-VPD INQUIRY command output. | |
1725 | * | |
1726 | * LOCKING: | |
1727 | * spin_lock_irqsave(host lock) | |
1728 | */ | |
1729 | ||
1730 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1731 | unsigned int buflen) | |
1732 | { | |
1733 | u8 hdr[] = { | |
1734 | TYPE_DISK, | |
1735 | 0, | |
1736 | 0x5, /* claim SPC-3 version compatibility */ | |
1737 | 2, | |
1738 | 95 - 4 | |
1739 | }; | |
1740 | ||
1741 | /* set scsi removeable (RMB) bit per ata bit */ | |
1742 | if (ata_id_removeable(args->id)) | |
1743 | hdr[1] |= (1 << 7); | |
1744 | ||
1745 | VPRINTK("ENTER\n"); | |
1746 | ||
1747 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1748 | ||
1749 | if (buflen > 35) { | |
1750 | memcpy(&rbuf[8], "ATA ", 8); | |
1751 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); | |
1752 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1753 | if (rbuf[32] == 0 || rbuf[32] == ' ') | |
1754 | memcpy(&rbuf[32], "n/a ", 4); | |
1755 | } | |
1756 | ||
1757 | if (buflen > 63) { | |
1758 | const u8 versions[] = { | |
1759 | 0x60, /* SAM-3 (no version claimed) */ | |
1760 | ||
1761 | 0x03, | |
1762 | 0x20, /* SBC-2 (no version claimed) */ | |
1763 | ||
1764 | 0x02, | |
1765 | 0x60 /* SPC-3 (no version claimed) */ | |
1766 | }; | |
1767 | ||
1768 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1769 | } | |
1770 | ||
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | /** | |
1775 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages | |
1776 | * @args: device IDENTIFY data / SCSI command of interest. | |
1777 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1778 | * @buflen: Response buffer length. | |
1779 | * | |
1780 | * Returns list of inquiry VPD pages available. | |
1781 | * | |
1782 | * LOCKING: | |
1783 | * spin_lock_irqsave(host lock) | |
1784 | */ | |
1785 | ||
1786 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1787 | unsigned int buflen) | |
1788 | { | |
1789 | const u8 pages[] = { | |
1790 | 0x00, /* page 0x00, this page */ | |
1791 | 0x80, /* page 0x80, unit serial no page */ | |
1792 | 0x83 /* page 0x83, device ident page */ | |
1793 | }; | |
1794 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ | |
1795 | ||
1796 | if (buflen > 6) | |
1797 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1798 | ||
1799 | return 0; | |
1800 | } | |
1801 | ||
1802 | /** | |
1803 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number | |
1804 | * @args: device IDENTIFY data / SCSI command of interest. | |
1805 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1806 | * @buflen: Response buffer length. | |
1807 | * | |
1808 | * Returns ATA device serial number. | |
1809 | * | |
1810 | * LOCKING: | |
1811 | * spin_lock_irqsave(host lock) | |
1812 | */ | |
1813 | ||
1814 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1815 | unsigned int buflen) | |
1816 | { | |
1817 | const u8 hdr[] = { | |
1818 | 0, | |
1819 | 0x80, /* this page code */ | |
1820 | 0, | |
1821 | ATA_SERNO_LEN, /* page len */ | |
1822 | }; | |
1823 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1824 | ||
1825 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
1826 | ata_id_string(args->id, (unsigned char *) &rbuf[4], | |
1827 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1828 | ||
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | /** | |
1833 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity | |
1834 | * @args: device IDENTIFY data / SCSI command of interest. | |
1835 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1836 | * @buflen: Response buffer length. | |
1837 | * | |
1838 | * Yields two logical unit device identification designators: | |
1839 | * - vendor specific ASCII containing the ATA serial number | |
1840 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1841 | * name ("ATA "), model and serial numbers. | |
1842 | * | |
1843 | * LOCKING: | |
1844 | * spin_lock_irqsave(host lock) | |
1845 | */ | |
1846 | ||
1847 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1848 | unsigned int buflen) | |
1849 | { | |
1850 | int num; | |
1851 | const int sat_model_serial_desc_len = 68; | |
1852 | const int ata_model_byte_len = 40; | |
1853 | ||
1854 | rbuf[1] = 0x83; /* this page code */ | |
1855 | num = 4; | |
1856 | ||
1857 | if (buflen > (ATA_SERNO_LEN + num + 3)) { | |
1858 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ | |
1859 | rbuf[num + 0] = 2; | |
1860 | rbuf[num + 3] = ATA_SERNO_LEN; | |
1861 | num += 4; | |
1862 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1863 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1864 | num += ATA_SERNO_LEN; | |
1865 | } | |
1866 | if (buflen > (sat_model_serial_desc_len + num + 3)) { | |
1867 | /* SAT defined lu model and serial numbers descriptor */ | |
1868 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
1869 | rbuf[num + 0] = 2; | |
1870 | rbuf[num + 1] = 1; | |
1871 | rbuf[num + 3] = sat_model_serial_desc_len; | |
1872 | num += 4; | |
1873 | memcpy(rbuf + num, "ATA ", 8); | |
1874 | num += 8; | |
1875 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1876 | ATA_ID_PROD_OFS, ata_model_byte_len); | |
1877 | num += ata_model_byte_len; | |
1878 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1879 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1880 | num += ATA_SERNO_LEN; | |
1881 | } | |
1882 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1883 | return 0; | |
1884 | } | |
1885 | ||
1886 | /** | |
1887 | * ata_scsiop_noop - Command handler that simply returns success. | |
1888 | * @args: device IDENTIFY data / SCSI command of interest. | |
1889 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1890 | * @buflen: Response buffer length. | |
1891 | * | |
1892 | * No operation. Simply returns success to caller, to indicate | |
1893 | * that the caller should successfully complete this SCSI command. | |
1894 | * | |
1895 | * LOCKING: | |
1896 | * spin_lock_irqsave(host lock) | |
1897 | */ | |
1898 | ||
1899 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1900 | unsigned int buflen) | |
1901 | { | |
1902 | VPRINTK("ENTER\n"); | |
1903 | return 0; | |
1904 | } | |
1905 | ||
1906 | /** | |
1907 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1908 | * @ptr_io: (input/output) Location to store more output data | |
1909 | * @last: End of output data buffer | |
1910 | * @buf: Pointer to BLOB being added to output buffer | |
1911 | * @buflen: Length of BLOB | |
1912 | * | |
1913 | * Store MODE SENSE data on an output buffer. | |
1914 | * | |
1915 | * LOCKING: | |
1916 | * None. | |
1917 | */ | |
1918 | ||
1919 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1920 | const u8 *buf, unsigned int buflen) | |
1921 | { | |
1922 | u8 *ptr = *ptr_io; | |
1923 | ||
1924 | if ((ptr + buflen - 1) > last) | |
1925 | return; | |
1926 | ||
1927 | memcpy(ptr, buf, buflen); | |
1928 | ||
1929 | ptr += buflen; | |
1930 | ||
1931 | *ptr_io = ptr; | |
1932 | } | |
1933 | ||
1934 | /** | |
1935 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1936 | * @id: device IDENTIFY data | |
1937 | * @ptr_io: (input/output) Location to store more output data | |
1938 | * @last: End of output data buffer | |
1939 | * | |
1940 | * Generate a caching info page, which conditionally indicates | |
1941 | * write caching to the SCSI layer, depending on device | |
1942 | * capabilities. | |
1943 | * | |
1944 | * LOCKING: | |
1945 | * None. | |
1946 | */ | |
1947 | ||
1948 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1949 | const u8 *last) | |
1950 | { | |
1951 | u8 page[CACHE_MPAGE_LEN]; | |
1952 | ||
1953 | memcpy(page, def_cache_mpage, sizeof(page)); | |
1954 | if (ata_id_wcache_enabled(id)) | |
1955 | page[2] |= (1 << 2); /* write cache enable */ | |
1956 | if (!ata_id_rahead_enabled(id)) | |
1957 | page[12] |= (1 << 5); /* disable read ahead */ | |
1958 | ||
1959 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1960 | return sizeof(page); | |
1961 | } | |
1962 | ||
1963 | /** | |
1964 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1965 | * @dev: Device associated with this MODE SENSE command | |
1966 | * @ptr_io: (input/output) Location to store more output data | |
1967 | * @last: End of output data buffer | |
1968 | * | |
1969 | * Generate a generic MODE SENSE control mode page. | |
1970 | * | |
1971 | * LOCKING: | |
1972 | * None. | |
1973 | */ | |
1974 | ||
1975 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1976 | { | |
1977 | ata_msense_push(ptr_io, last, def_control_mpage, | |
1978 | sizeof(def_control_mpage)); | |
1979 | return sizeof(def_control_mpage); | |
1980 | } | |
1981 | ||
1982 | /** | |
1983 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1984 | * @dev: Device associated with this MODE SENSE command | |
1985 | * @ptr_io: (input/output) Location to store more output data | |
1986 | * @last: End of output data buffer | |
1987 | * | |
1988 | * Generate a generic MODE SENSE r/w error recovery page. | |
1989 | * | |
1990 | * LOCKING: | |
1991 | * None. | |
1992 | */ | |
1993 | ||
1994 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1995 | { | |
1996 | ||
1997 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, | |
1998 | sizeof(def_rw_recovery_mpage)); | |
1999 | return sizeof(def_rw_recovery_mpage); | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * We can turn this into a real blacklist if it's needed, for now just | |
2004 | * blacklist any Maxtor BANC1G10 revision firmware | |
2005 | */ | |
2006 | static int ata_dev_supports_fua(u16 *id) | |
2007 | { | |
2008 | unsigned char model[41], fw[9]; | |
2009 | ||
2010 | if (!libata_fua) | |
2011 | return 0; | |
2012 | if (!ata_id_has_fua(id)) | |
2013 | return 0; | |
2014 | ||
2015 | ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model)); | |
2016 | ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw)); | |
2017 | ||
2018 | if (strcmp(model, "Maxtor")) | |
2019 | return 1; | |
2020 | if (strcmp(fw, "BANC1G10")) | |
2021 | return 1; | |
2022 | ||
2023 | return 0; /* blacklisted */ | |
2024 | } | |
2025 | ||
2026 | /** | |
2027 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
2028 | * @args: device IDENTIFY data / SCSI command of interest. | |
2029 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2030 | * @buflen: Response buffer length. | |
2031 | * | |
2032 | * Simulate MODE SENSE commands. Assume this is invoked for direct | |
2033 | * access devices (e.g. disks) only. There should be no block | |
2034 | * descriptor for other device types. | |
2035 | * | |
2036 | * LOCKING: | |
2037 | * spin_lock_irqsave(host lock) | |
2038 | */ | |
2039 | ||
2040 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
2041 | unsigned int buflen) | |
2042 | { | |
2043 | struct ata_device *dev = args->dev; | |
2044 | u8 *scsicmd = args->cmd->cmnd, *p, *last; | |
2045 | const u8 sat_blk_desc[] = { | |
2046 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
2047 | 0, | |
2048 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
2049 | }; | |
2050 | u8 pg, spg; | |
2051 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
2052 | u8 dpofua; | |
2053 | ||
2054 | VPRINTK("ENTER\n"); | |
2055 | ||
2056 | six_byte = (scsicmd[0] == MODE_SENSE); | |
2057 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ | |
2058 | /* | |
2059 | * LLBA bit in msense(10) ignored (compliant) | |
2060 | */ | |
2061 | ||
2062 | page_control = scsicmd[2] >> 6; | |
2063 | switch (page_control) { | |
2064 | case 0: /* current */ | |
2065 | break; /* supported */ | |
2066 | case 3: /* saved */ | |
2067 | goto saving_not_supp; | |
2068 | case 1: /* changeable */ | |
2069 | case 2: /* defaults */ | |
2070 | default: | |
2071 | goto invalid_fld; | |
2072 | } | |
2073 | ||
2074 | if (six_byte) { | |
2075 | output_len = 4 + (ebd ? 8 : 0); | |
2076 | alloc_len = scsicmd[4]; | |
2077 | } else { | |
2078 | output_len = 8 + (ebd ? 8 : 0); | |
2079 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2080 | } | |
2081 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
2082 | ||
2083 | p = rbuf + output_len; | |
2084 | last = rbuf + minlen - 1; | |
2085 | ||
2086 | pg = scsicmd[2] & 0x3f; | |
2087 | spg = scsicmd[3]; | |
2088 | /* | |
2089 | * No mode subpages supported (yet) but asking for _all_ | |
2090 | * subpages may be valid | |
2091 | */ | |
2092 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2093 | goto invalid_fld; | |
2094 | ||
2095 | switch(pg) { | |
2096 | case RW_RECOVERY_MPAGE: | |
2097 | output_len += ata_msense_rw_recovery(&p, last); | |
2098 | break; | |
2099 | ||
2100 | case CACHE_MPAGE: | |
2101 | output_len += ata_msense_caching(args->id, &p, last); | |
2102 | break; | |
2103 | ||
2104 | case CONTROL_MPAGE: { | |
2105 | output_len += ata_msense_ctl_mode(&p, last); | |
2106 | break; | |
2107 | } | |
2108 | ||
2109 | case ALL_MPAGES: | |
2110 | output_len += ata_msense_rw_recovery(&p, last); | |
2111 | output_len += ata_msense_caching(args->id, &p, last); | |
2112 | output_len += ata_msense_ctl_mode(&p, last); | |
2113 | break; | |
2114 | ||
2115 | default: /* invalid page code */ | |
2116 | goto invalid_fld; | |
2117 | } | |
2118 | ||
2119 | if (minlen < 1) | |
2120 | return 0; | |
2121 | ||
2122 | dpofua = 0; | |
2123 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && | |
2124 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) | |
2125 | dpofua = 1 << 4; | |
2126 | ||
2127 | if (six_byte) { | |
2128 | output_len--; | |
2129 | rbuf[0] = output_len; | |
2130 | if (minlen > 2) | |
2131 | rbuf[2] |= dpofua; | |
2132 | if (ebd) { | |
2133 | if (minlen > 3) | |
2134 | rbuf[3] = sizeof(sat_blk_desc); | |
2135 | if (minlen > 11) | |
2136 | memcpy(rbuf + 4, sat_blk_desc, | |
2137 | sizeof(sat_blk_desc)); | |
2138 | } | |
2139 | } else { | |
2140 | output_len -= 2; | |
2141 | rbuf[0] = output_len >> 8; | |
2142 | if (minlen > 1) | |
2143 | rbuf[1] = output_len; | |
2144 | if (minlen > 3) | |
2145 | rbuf[3] |= dpofua; | |
2146 | if (ebd) { | |
2147 | if (minlen > 7) | |
2148 | rbuf[7] = sizeof(sat_blk_desc); | |
2149 | if (minlen > 15) | |
2150 | memcpy(rbuf + 8, sat_blk_desc, | |
2151 | sizeof(sat_blk_desc)); | |
2152 | } | |
2153 | } | |
2154 | return 0; | |
2155 | ||
2156 | invalid_fld: | |
2157 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2158 | /* "Invalid field in cbd" */ | |
2159 | return 1; | |
2160 | ||
2161 | saving_not_supp: | |
2162 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2163 | /* "Saving parameters not supported" */ | |
2164 | return 1; | |
2165 | } | |
2166 | ||
2167 | /** | |
2168 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2169 | * @args: device IDENTIFY data / SCSI command of interest. | |
2170 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2171 | * @buflen: Response buffer length. | |
2172 | * | |
2173 | * Simulate READ CAPACITY commands. | |
2174 | * | |
2175 | * LOCKING: | |
2176 | * spin_lock_irqsave(host lock) | |
2177 | */ | |
2178 | ||
2179 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, | |
2180 | unsigned int buflen) | |
2181 | { | |
2182 | u64 n_sectors; | |
2183 | u32 tmp; | |
2184 | ||
2185 | VPRINTK("ENTER\n"); | |
2186 | ||
2187 | if (ata_id_has_lba(args->id)) { | |
2188 | if (ata_id_has_lba48(args->id)) | |
2189 | n_sectors = ata_id_u64(args->id, 100); | |
2190 | else | |
2191 | n_sectors = ata_id_u32(args->id, 60); | |
2192 | } else { | |
2193 | /* CHS default translation */ | |
2194 | n_sectors = args->id[1] * args->id[3] * args->id[6]; | |
2195 | ||
2196 | if (ata_id_current_chs_valid(args->id)) | |
2197 | /* CHS current translation */ | |
2198 | n_sectors = ata_id_u32(args->id, 57); | |
2199 | } | |
2200 | ||
2201 | n_sectors--; /* ATA TotalUserSectors - 1 */ | |
2202 | ||
2203 | if (args->cmd->cmnd[0] == READ_CAPACITY) { | |
2204 | if( n_sectors >= 0xffffffffULL ) | |
2205 | tmp = 0xffffffff ; /* Return max count on overflow */ | |
2206 | else | |
2207 | tmp = n_sectors ; | |
2208 | ||
2209 | /* sector count, 32-bit */ | |
2210 | rbuf[0] = tmp >> (8 * 3); | |
2211 | rbuf[1] = tmp >> (8 * 2); | |
2212 | rbuf[2] = tmp >> (8 * 1); | |
2213 | rbuf[3] = tmp; | |
2214 | ||
2215 | /* sector size */ | |
2216 | tmp = ATA_SECT_SIZE; | |
2217 | rbuf[6] = tmp >> 8; | |
2218 | rbuf[7] = tmp; | |
2219 | ||
2220 | } else { | |
2221 | /* sector count, 64-bit */ | |
2222 | tmp = n_sectors >> (8 * 4); | |
2223 | rbuf[2] = tmp >> (8 * 3); | |
2224 | rbuf[3] = tmp >> (8 * 2); | |
2225 | rbuf[4] = tmp >> (8 * 1); | |
2226 | rbuf[5] = tmp; | |
2227 | tmp = n_sectors; | |
2228 | rbuf[6] = tmp >> (8 * 3); | |
2229 | rbuf[7] = tmp >> (8 * 2); | |
2230 | rbuf[8] = tmp >> (8 * 1); | |
2231 | rbuf[9] = tmp; | |
2232 | ||
2233 | /* sector size */ | |
2234 | tmp = ATA_SECT_SIZE; | |
2235 | rbuf[12] = tmp >> 8; | |
2236 | rbuf[13] = tmp; | |
2237 | } | |
2238 | ||
2239 | return 0; | |
2240 | } | |
2241 | ||
2242 | /** | |
2243 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2244 | * @args: device IDENTIFY data / SCSI command of interest. | |
2245 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2246 | * @buflen: Response buffer length. | |
2247 | * | |
2248 | * Simulate REPORT LUNS command. | |
2249 | * | |
2250 | * LOCKING: | |
2251 | * spin_lock_irqsave(host lock) | |
2252 | */ | |
2253 | ||
2254 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2255 | unsigned int buflen) | |
2256 | { | |
2257 | VPRINTK("ENTER\n"); | |
2258 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2259 | ||
2260 | return 0; | |
2261 | } | |
2262 | ||
2263 | /** | |
2264 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2265 | * @cmd: SCSI request to be handled | |
2266 | * @sk: SCSI-defined sense key | |
2267 | * @asc: SCSI-defined additional sense code | |
2268 | * @ascq: SCSI-defined additional sense code qualifier | |
2269 | * | |
2270 | * Helper function that builds a valid fixed format, current | |
2271 | * response code and the given sense key (sk), additional sense | |
2272 | * code (asc) and additional sense code qualifier (ascq) with | |
2273 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2274 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2275 | * | |
2276 | * LOCKING: | |
2277 | * Not required | |
2278 | */ | |
2279 | ||
2280 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2281 | { | |
2282 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2283 | ||
2284 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2285 | cmd->sense_buffer[2] = sk; | |
2286 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2287 | cmd->sense_buffer[12] = asc; | |
2288 | cmd->sense_buffer[13] = ascq; | |
2289 | } | |
2290 | ||
2291 | /** | |
2292 | * ata_scsi_badcmd - End a SCSI request with an error | |
2293 | * @cmd: SCSI request to be handled | |
2294 | * @done: SCSI command completion function | |
2295 | * @asc: SCSI-defined additional sense code | |
2296 | * @ascq: SCSI-defined additional sense code qualifier | |
2297 | * | |
2298 | * Helper function that completes a SCSI command with | |
2299 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2300 | * and the specified additional sense codes. | |
2301 | * | |
2302 | * LOCKING: | |
2303 | * spin_lock_irqsave(host lock) | |
2304 | */ | |
2305 | ||
2306 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2307 | { | |
2308 | DPRINTK("ENTER\n"); | |
2309 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); | |
2310 | ||
2311 | done(cmd); | |
2312 | } | |
2313 | ||
2314 | static void atapi_sense_complete(struct ata_queued_cmd *qc) | |
2315 | { | |
2316 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { | |
2317 | /* FIXME: not quite right; we don't want the | |
2318 | * translation of taskfile registers into | |
2319 | * a sense descriptors, since that's only | |
2320 | * correct for ATA, not ATAPI | |
2321 | */ | |
2322 | ata_gen_ata_desc_sense(qc); | |
2323 | } | |
2324 | ||
2325 | qc->scsidone(qc->scsicmd); | |
2326 | ata_qc_free(qc); | |
2327 | } | |
2328 | ||
2329 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
2330 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2331 | { | |
2332 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2333 | } | |
2334 | ||
2335 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2336 | { | |
2337 | struct ata_port *ap = qc->ap; | |
2338 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2339 | ||
2340 | DPRINTK("ATAPI request sense\n"); | |
2341 | ||
2342 | /* FIXME: is this needed? */ | |
2343 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2344 | ||
2345 | ap->ops->tf_read(ap, &qc->tf); | |
2346 | ||
2347 | /* fill these in, for the case where they are -not- overwritten */ | |
2348 | cmd->sense_buffer[0] = 0x70; | |
2349 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2350 | ||
2351 | ata_qc_reinit(qc); | |
2352 | ||
2353 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); | |
2354 | qc->dma_dir = DMA_FROM_DEVICE; | |
2355 | ||
2356 | memset(&qc->cdb, 0, qc->dev->cdb_len); | |
2357 | qc->cdb[0] = REQUEST_SENSE; | |
2358 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2359 | ||
2360 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2361 | qc->tf.command = ATA_CMD_PACKET; | |
2362 | ||
2363 | if (ata_pio_use_silly(ap)) { | |
2364 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2365 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2366 | } else { | |
2367 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2368 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2369 | qc->tf.lbah = (8 * 1024) >> 8; | |
2370 | } | |
2371 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; | |
2372 | ||
2373 | qc->complete_fn = atapi_sense_complete; | |
2374 | ||
2375 | ata_qc_issue(qc); | |
2376 | ||
2377 | DPRINTK("EXIT\n"); | |
2378 | } | |
2379 | ||
2380 | static void atapi_qc_complete(struct ata_queued_cmd *qc) | |
2381 | { | |
2382 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2383 | unsigned int err_mask = qc->err_mask; | |
2384 | ||
2385 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); | |
2386 | ||
2387 | /* handle completion from new EH */ | |
2388 | if (unlikely(qc->ap->ops->error_handler && | |
2389 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2390 | ||
2391 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2392 | /* FIXME: not quite right; we don't want the | |
2393 | * translation of taskfile registers into a | |
2394 | * sense descriptors, since that's only | |
2395 | * correct for ATA, not ATAPI | |
2396 | */ | |
2397 | ata_gen_ata_desc_sense(qc); | |
2398 | } | |
2399 | ||
2400 | /* SCSI EH automatically locks door if sdev->locked is | |
2401 | * set. Sometimes door lock request continues to | |
2402 | * fail, for example, when no media is present. This | |
2403 | * creates a loop - SCSI EH issues door lock which | |
2404 | * fails and gets invoked again to acquire sense data | |
2405 | * for the failed command. | |
2406 | * | |
2407 | * If door lock fails, always clear sdev->locked to | |
2408 | * avoid this infinite loop. | |
2409 | */ | |
2410 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2411 | qc->dev->sdev->locked = 0; | |
2412 | ||
2413 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; | |
2414 | qc->scsidone(cmd); | |
2415 | ata_qc_free(qc); | |
2416 | return; | |
2417 | } | |
2418 | ||
2419 | /* successful completion or old EH failure path */ | |
2420 | if (unlikely(err_mask & AC_ERR_DEV)) { | |
2421 | cmd->result = SAM_STAT_CHECK_CONDITION; | |
2422 | atapi_request_sense(qc); | |
2423 | return; | |
2424 | } else if (unlikely(err_mask)) { | |
2425 | /* FIXME: not quite right; we don't want the | |
2426 | * translation of taskfile registers into | |
2427 | * a sense descriptors, since that's only | |
2428 | * correct for ATA, not ATAPI | |
2429 | */ | |
2430 | ata_gen_ata_desc_sense(qc); | |
2431 | } else { | |
2432 | u8 *scsicmd = cmd->cmnd; | |
2433 | ||
2434 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { | |
2435 | u8 *buf = NULL; | |
2436 | unsigned int buflen; | |
2437 | ||
2438 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
2439 | ||
2440 | /* ATAPI devices typically report zero for their SCSI version, | |
2441 | * and sometimes deviate from the spec WRT response data | |
2442 | * format. If SCSI version is reported as zero like normal, | |
2443 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2444 | * to indicate to the Linux scsi midlayer this is a modern | |
2445 | * device. 2) Ensure response data format / ATAPI information | |
2446 | * are always correct. | |
2447 | */ | |
2448 | if (buf[2] == 0) { | |
2449 | buf[2] = 0x5; | |
2450 | buf[3] = 0x32; | |
2451 | } | |
2452 | ||
2453 | ata_scsi_rbuf_put(cmd, buf); | |
2454 | } | |
2455 | ||
2456 | cmd->result = SAM_STAT_GOOD; | |
2457 | } | |
2458 | ||
2459 | qc->scsidone(cmd); | |
2460 | ata_qc_free(qc); | |
2461 | } | |
2462 | /** | |
2463 | * atapi_xlat - Initialize PACKET taskfile | |
2464 | * @qc: command structure to be initialized | |
2465 | * @scsicmd: SCSI CDB associated with this PACKET command | |
2466 | * | |
2467 | * LOCKING: | |
2468 | * spin_lock_irqsave(host lock) | |
2469 | * | |
2470 | * RETURNS: | |
2471 | * Zero on success, non-zero on failure. | |
2472 | */ | |
2473 | ||
2474 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) | |
2475 | { | |
2476 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2477 | struct ata_device *dev = qc->dev; | |
2478 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
2479 | int nodata = (cmd->sc_data_direction == DMA_NONE); | |
2480 | ||
2481 | if (!using_pio) | |
2482 | /* Check whether ATAPI DMA is safe */ | |
2483 | if (ata_check_atapi_dma(qc)) | |
2484 | using_pio = 1; | |
2485 | ||
2486 | memcpy(&qc->cdb, scsicmd, dev->cdb_len); | |
2487 | ||
2488 | qc->complete_fn = atapi_qc_complete; | |
2489 | ||
2490 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2491 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { | |
2492 | qc->tf.flags |= ATA_TFLAG_WRITE; | |
2493 | DPRINTK("direction: write\n"); | |
2494 | } | |
2495 | ||
2496 | qc->tf.command = ATA_CMD_PACKET; | |
2497 | ||
2498 | /* no data, or PIO data xfer */ | |
2499 | if (using_pio || nodata) { | |
2500 | if (nodata) | |
2501 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2502 | else | |
2503 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2504 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2505 | qc->tf.lbah = (8 * 1024) >> 8; | |
2506 | } | |
2507 | ||
2508 | /* DMA data xfer */ | |
2509 | else { | |
2510 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2511 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2512 | ||
2513 | if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE)) | |
2514 | /* some SATA bridges need us to indicate data xfer direction */ | |
2515 | qc->tf.feature |= ATAPI_DMADIR; | |
2516 | } | |
2517 | ||
2518 | qc->nbytes = cmd->request_bufflen; | |
2519 | ||
2520 | return 0; | |
2521 | } | |
2522 | ||
2523 | static struct ata_device * ata_find_dev(struct ata_port *ap, int id) | |
2524 | { | |
2525 | if (likely(id < ATA_MAX_DEVICES)) | |
2526 | return &ap->device[id]; | |
2527 | return NULL; | |
2528 | } | |
2529 | ||
2530 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
2531 | const struct scsi_device *scsidev) | |
2532 | { | |
2533 | /* skip commands not addressed to targets we simulate */ | |
2534 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2535 | return NULL; | |
2536 | ||
2537 | return ata_find_dev(ap, scsidev->id); | |
2538 | } | |
2539 | ||
2540 | /** | |
2541 | * ata_scsi_dev_enabled - determine if device is enabled | |
2542 | * @dev: ATA device | |
2543 | * | |
2544 | * Determine if commands should be sent to the specified device. | |
2545 | * | |
2546 | * LOCKING: | |
2547 | * spin_lock_irqsave(host lock) | |
2548 | * | |
2549 | * RETURNS: | |
2550 | * 0 if commands are not allowed / 1 if commands are allowed | |
2551 | */ | |
2552 | ||
2553 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2554 | { | |
2555 | if (unlikely(!ata_dev_enabled(dev))) | |
2556 | return 0; | |
2557 | ||
2558 | if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { | |
2559 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { | |
2560 | ata_dev_printk(dev, KERN_WARNING, | |
2561 | "WARNING: ATAPI is %s, device ignored.\n", | |
2562 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2563 | return 0; | |
2564 | } | |
2565 | } | |
2566 | ||
2567 | return 1; | |
2568 | } | |
2569 | ||
2570 | /** | |
2571 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2572 | * @ap: ATA port to which the device is attached | |
2573 | * @scsidev: SCSI device from which we derive the ATA device | |
2574 | * | |
2575 | * Given various information provided in struct scsi_cmnd, | |
2576 | * map that onto an ATA bus, and using that mapping | |
2577 | * determine which ata_device is associated with the | |
2578 | * SCSI command to be sent. | |
2579 | * | |
2580 | * LOCKING: | |
2581 | * spin_lock_irqsave(host lock) | |
2582 | * | |
2583 | * RETURNS: | |
2584 | * Associated ATA device, or %NULL if not found. | |
2585 | */ | |
2586 | static struct ata_device * | |
2587 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) | |
2588 | { | |
2589 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); | |
2590 | ||
2591 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) | |
2592 | return NULL; | |
2593 | ||
2594 | return dev; | |
2595 | } | |
2596 | ||
2597 | /* | |
2598 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2599 | * @byte1: Byte 1 from pass-thru CDB. | |
2600 | * | |
2601 | * RETURNS: | |
2602 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2603 | */ | |
2604 | static u8 | |
2605 | ata_scsi_map_proto(u8 byte1) | |
2606 | { | |
2607 | switch((byte1 & 0x1e) >> 1) { | |
2608 | case 3: /* Non-data */ | |
2609 | return ATA_PROT_NODATA; | |
2610 | ||
2611 | case 6: /* DMA */ | |
2612 | return ATA_PROT_DMA; | |
2613 | ||
2614 | case 4: /* PIO Data-in */ | |
2615 | case 5: /* PIO Data-out */ | |
2616 | return ATA_PROT_PIO; | |
2617 | ||
2618 | case 10: /* Device Reset */ | |
2619 | case 0: /* Hard Reset */ | |
2620 | case 1: /* SRST */ | |
2621 | case 2: /* Bus Idle */ | |
2622 | case 7: /* Packet */ | |
2623 | case 8: /* DMA Queued */ | |
2624 | case 9: /* Device Diagnostic */ | |
2625 | case 11: /* UDMA Data-in */ | |
2626 | case 12: /* UDMA Data-Out */ | |
2627 | case 13: /* FPDMA */ | |
2628 | default: /* Reserved */ | |
2629 | break; | |
2630 | } | |
2631 | ||
2632 | return ATA_PROT_UNKNOWN; | |
2633 | } | |
2634 | ||
2635 | /** | |
2636 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2637 | * @qc: command structure to be initialized | |
2638 | * @scsicmd: SCSI command to convert | |
2639 | * | |
2640 | * Handles either 12 or 16-byte versions of the CDB. | |
2641 | * | |
2642 | * RETURNS: | |
2643 | * Zero on success, non-zero on failure. | |
2644 | */ | |
2645 | static unsigned int | |
2646 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd) | |
2647 | { | |
2648 | struct ata_taskfile *tf = &(qc->tf); | |
2649 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2650 | struct ata_device *dev = qc->dev; | |
2651 | ||
2652 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) | |
2653 | goto invalid_fld; | |
2654 | ||
2655 | /* We may not issue DMA commands if no DMA mode is set */ | |
2656 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2657 | goto invalid_fld; | |
2658 | ||
2659 | if (scsicmd[1] & 0xe0) | |
2660 | /* PIO multi not supported yet */ | |
2661 | goto invalid_fld; | |
2662 | ||
2663 | /* | |
2664 | * 12 and 16 byte CDBs use different offsets to | |
2665 | * provide the various register values. | |
2666 | */ | |
2667 | if (scsicmd[0] == ATA_16) { | |
2668 | /* | |
2669 | * 16-byte CDB - may contain extended commands. | |
2670 | * | |
2671 | * If that is the case, copy the upper byte register values. | |
2672 | */ | |
2673 | if (scsicmd[1] & 0x01) { | |
2674 | tf->hob_feature = scsicmd[3]; | |
2675 | tf->hob_nsect = scsicmd[5]; | |
2676 | tf->hob_lbal = scsicmd[7]; | |
2677 | tf->hob_lbam = scsicmd[9]; | |
2678 | tf->hob_lbah = scsicmd[11]; | |
2679 | tf->flags |= ATA_TFLAG_LBA48; | |
2680 | } else | |
2681 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2682 | ||
2683 | /* | |
2684 | * Always copy low byte, device and command registers. | |
2685 | */ | |
2686 | tf->feature = scsicmd[4]; | |
2687 | tf->nsect = scsicmd[6]; | |
2688 | tf->lbal = scsicmd[8]; | |
2689 | tf->lbam = scsicmd[10]; | |
2690 | tf->lbah = scsicmd[12]; | |
2691 | tf->device = scsicmd[13]; | |
2692 | tf->command = scsicmd[14]; | |
2693 | } else { | |
2694 | /* | |
2695 | * 12-byte CDB - incapable of extended commands. | |
2696 | */ | |
2697 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2698 | ||
2699 | tf->feature = scsicmd[3]; | |
2700 | tf->nsect = scsicmd[4]; | |
2701 | tf->lbal = scsicmd[5]; | |
2702 | tf->lbam = scsicmd[6]; | |
2703 | tf->lbah = scsicmd[7]; | |
2704 | tf->device = scsicmd[8]; | |
2705 | tf->command = scsicmd[9]; | |
2706 | } | |
2707 | /* | |
2708 | * If slave is possible, enforce correct master/slave bit | |
2709 | */ | |
2710 | if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) | |
2711 | tf->device = qc->dev->devno ? | |
2712 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
2713 | ||
2714 | /* | |
2715 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2716 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2717 | * by an update to hardware-specific registers for each | |
2718 | * controller (i.e. the reason for ->set_piomode(), | |
2719 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2720 | */ | |
2721 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2722 | && (tf->feature == SETFEATURES_XFER)) | |
2723 | goto invalid_fld; | |
2724 | ||
2725 | /* | |
2726 | * Set flags so that all registers will be written, | |
2727 | * and pass on write indication (used for PIO/DMA | |
2728 | * setup.) | |
2729 | */ | |
2730 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2731 | ||
2732 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
2733 | tf->flags |= ATA_TFLAG_WRITE; | |
2734 | ||
2735 | /* | |
2736 | * Set transfer length. | |
2737 | * | |
2738 | * TODO: find out if we need to do more here to | |
2739 | * cover scatter/gather case. | |
2740 | */ | |
2741 | qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE; | |
2742 | ||
2743 | /* request result TF */ | |
2744 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2745 | ||
2746 | return 0; | |
2747 | ||
2748 | invalid_fld: | |
2749 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00); | |
2750 | /* "Invalid field in cdb" */ | |
2751 | return 1; | |
2752 | } | |
2753 | ||
2754 | /** | |
2755 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2756 | * @dev: ATA device | |
2757 | * @cmd: SCSI command opcode to consider | |
2758 | * | |
2759 | * Look up the SCSI command given, and determine whether the | |
2760 | * SCSI command is to be translated or simulated. | |
2761 | * | |
2762 | * RETURNS: | |
2763 | * Pointer to translation function if possible, %NULL if not. | |
2764 | */ | |
2765 | ||
2766 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2767 | { | |
2768 | switch (cmd) { | |
2769 | case READ_6: | |
2770 | case READ_10: | |
2771 | case READ_16: | |
2772 | ||
2773 | case WRITE_6: | |
2774 | case WRITE_10: | |
2775 | case WRITE_16: | |
2776 | return ata_scsi_rw_xlat; | |
2777 | ||
2778 | case SYNCHRONIZE_CACHE: | |
2779 | if (ata_try_flush_cache(dev)) | |
2780 | return ata_scsi_flush_xlat; | |
2781 | break; | |
2782 | ||
2783 | case VERIFY: | |
2784 | case VERIFY_16: | |
2785 | return ata_scsi_verify_xlat; | |
2786 | ||
2787 | case ATA_12: | |
2788 | case ATA_16: | |
2789 | return ata_scsi_pass_thru; | |
2790 | ||
2791 | case START_STOP: | |
2792 | return ata_scsi_start_stop_xlat; | |
2793 | } | |
2794 | ||
2795 | return NULL; | |
2796 | } | |
2797 | ||
2798 | /** | |
2799 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2800 | * @ap: ATA port to which the command was being sent | |
2801 | * @cmd: SCSI command to dump | |
2802 | * | |
2803 | * Prints the contents of a SCSI command via printk(). | |
2804 | */ | |
2805 | ||
2806 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2807 | struct scsi_cmnd *cmd) | |
2808 | { | |
2809 | #ifdef ATA_DEBUG | |
2810 | struct scsi_device *scsidev = cmd->device; | |
2811 | u8 *scsicmd = cmd->cmnd; | |
2812 | ||
2813 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2814 | ap->id, | |
2815 | scsidev->channel, scsidev->id, scsidev->lun, | |
2816 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2817 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2818 | scsicmd[8]); | |
2819 | #endif | |
2820 | } | |
2821 | ||
2822 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd, | |
2823 | void (*done)(struct scsi_cmnd *), | |
2824 | struct ata_device *dev) | |
2825 | { | |
2826 | int rc = 0; | |
2827 | ||
2828 | if (dev->class == ATA_DEV_ATA) { | |
2829 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
2830 | cmd->cmnd[0]); | |
2831 | ||
2832 | if (xlat_func) | |
2833 | rc = ata_scsi_translate(dev, cmd, done, xlat_func); | |
2834 | else | |
2835 | ata_scsi_simulate(dev, cmd, done); | |
2836 | } else | |
2837 | rc = ata_scsi_translate(dev, cmd, done, atapi_xlat); | |
2838 | ||
2839 | return rc; | |
2840 | } | |
2841 | ||
2842 | /** | |
2843 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2844 | * @cmd: SCSI command to be sent | |
2845 | * @done: Completion function, called when command is complete | |
2846 | * | |
2847 | * In some cases, this function translates SCSI commands into | |
2848 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2849 | * hardware. In other cases, this function simulates a | |
2850 | * SCSI device by evaluating and responding to certain | |
2851 | * SCSI commands. This creates the overall effect of | |
2852 | * ATA and ATAPI devices appearing as SCSI devices. | |
2853 | * | |
2854 | * LOCKING: | |
2855 | * Releases scsi-layer-held lock, and obtains host lock. | |
2856 | * | |
2857 | * RETURNS: | |
2858 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, | |
2859 | * 0 otherwise. | |
2860 | */ | |
2861 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) | |
2862 | { | |
2863 | struct ata_port *ap; | |
2864 | struct ata_device *dev; | |
2865 | struct scsi_device *scsidev = cmd->device; | |
2866 | struct Scsi_Host *shost = scsidev->host; | |
2867 | int rc = 0; | |
2868 | ||
2869 | ap = ata_shost_to_port(shost); | |
2870 | ||
2871 | spin_unlock(shost->host_lock); | |
2872 | spin_lock(ap->lock); | |
2873 | ||
2874 | ata_scsi_dump_cdb(ap, cmd); | |
2875 | ||
2876 | dev = ata_scsi_find_dev(ap, scsidev); | |
2877 | if (likely(dev)) | |
2878 | rc = __ata_scsi_queuecmd(cmd, done, dev); | |
2879 | else { | |
2880 | cmd->result = (DID_BAD_TARGET << 16); | |
2881 | done(cmd); | |
2882 | } | |
2883 | ||
2884 | spin_unlock(ap->lock); | |
2885 | spin_lock(shost->host_lock); | |
2886 | return rc; | |
2887 | } | |
2888 | ||
2889 | /** | |
2890 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
2891 | * @dev: the target device | |
2892 | * @cmd: SCSI command being sent to device. | |
2893 | * @done: SCSI command completion function. | |
2894 | * | |
2895 | * Interprets and directly executes a select list of SCSI commands | |
2896 | * that can be handled internally. | |
2897 | * | |
2898 | * LOCKING: | |
2899 | * spin_lock_irqsave(host lock) | |
2900 | */ | |
2901 | ||
2902 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, | |
2903 | void (*done)(struct scsi_cmnd *)) | |
2904 | { | |
2905 | struct ata_scsi_args args; | |
2906 | const u8 *scsicmd = cmd->cmnd; | |
2907 | ||
2908 | args.dev = dev; | |
2909 | args.id = dev->id; | |
2910 | args.cmd = cmd; | |
2911 | args.done = done; | |
2912 | ||
2913 | switch(scsicmd[0]) { | |
2914 | /* no-op's, complete with success */ | |
2915 | case SYNCHRONIZE_CACHE: | |
2916 | case REZERO_UNIT: | |
2917 | case SEEK_6: | |
2918 | case SEEK_10: | |
2919 | case TEST_UNIT_READY: | |
2920 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2921 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2922 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2923 | break; | |
2924 | ||
2925 | case INQUIRY: | |
2926 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
2927 | ata_scsi_invalid_field(cmd, done); | |
2928 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ | |
2929 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2930 | else if (scsicmd[2] == 0x00) | |
2931 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2932 | else if (scsicmd[2] == 0x80) | |
2933 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2934 | else if (scsicmd[2] == 0x83) | |
2935 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2936 | else | |
2937 | ata_scsi_invalid_field(cmd, done); | |
2938 | break; | |
2939 | ||
2940 | case MODE_SENSE: | |
2941 | case MODE_SENSE_10: | |
2942 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2943 | break; | |
2944 | ||
2945 | case MODE_SELECT: /* unconditionally return */ | |
2946 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
2947 | ata_scsi_invalid_field(cmd, done); | |
2948 | break; | |
2949 | ||
2950 | case READ_CAPACITY: | |
2951 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2952 | break; | |
2953 | ||
2954 | case SERVICE_ACTION_IN: | |
2955 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2956 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2957 | else | |
2958 | ata_scsi_invalid_field(cmd, done); | |
2959 | break; | |
2960 | ||
2961 | case REPORT_LUNS: | |
2962 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2963 | break; | |
2964 | ||
2965 | /* mandatory commands we haven't implemented yet */ | |
2966 | case REQUEST_SENSE: | |
2967 | ||
2968 | /* all other commands */ | |
2969 | default: | |
2970 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); | |
2971 | /* "Invalid command operation code" */ | |
2972 | done(cmd); | |
2973 | break; | |
2974 | } | |
2975 | } | |
2976 | ||
2977 | void ata_scsi_scan_host(struct ata_port *ap) | |
2978 | { | |
2979 | unsigned int i; | |
2980 | ||
2981 | if (ap->flags & ATA_FLAG_DISABLED) | |
2982 | return; | |
2983 | ||
2984 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
2985 | struct ata_device *dev = &ap->device[i]; | |
2986 | struct scsi_device *sdev; | |
2987 | ||
2988 | if (!ata_dev_enabled(dev) || dev->sdev) | |
2989 | continue; | |
2990 | ||
2991 | sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL); | |
2992 | if (!IS_ERR(sdev)) { | |
2993 | dev->sdev = sdev; | |
2994 | scsi_device_put(sdev); | |
2995 | } | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | /** | |
3000 | * ata_scsi_offline_dev - offline attached SCSI device | |
3001 | * @dev: ATA device to offline attached SCSI device for | |
3002 | * | |
3003 | * This function is called from ata_eh_hotplug() and responsible | |
3004 | * for taking the SCSI device attached to @dev offline. This | |
3005 | * function is called with host lock which protects dev->sdev | |
3006 | * against clearing. | |
3007 | * | |
3008 | * LOCKING: | |
3009 | * spin_lock_irqsave(host lock) | |
3010 | * | |
3011 | * RETURNS: | |
3012 | * 1 if attached SCSI device exists, 0 otherwise. | |
3013 | */ | |
3014 | int ata_scsi_offline_dev(struct ata_device *dev) | |
3015 | { | |
3016 | if (dev->sdev) { | |
3017 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
3018 | return 1; | |
3019 | } | |
3020 | return 0; | |
3021 | } | |
3022 | ||
3023 | /** | |
3024 | * ata_scsi_remove_dev - remove attached SCSI device | |
3025 | * @dev: ATA device to remove attached SCSI device for | |
3026 | * | |
3027 | * This function is called from ata_eh_scsi_hotplug() and | |
3028 | * responsible for removing the SCSI device attached to @dev. | |
3029 | * | |
3030 | * LOCKING: | |
3031 | * Kernel thread context (may sleep). | |
3032 | */ | |
3033 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
3034 | { | |
3035 | struct ata_port *ap = dev->ap; | |
3036 | struct scsi_device *sdev; | |
3037 | unsigned long flags; | |
3038 | ||
3039 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
3040 | * state doesn't change underneath us and thus | |
3041 | * scsi_device_get() always succeeds. The mutex locking can | |
3042 | * be removed if there is __scsi_device_get() interface which | |
3043 | * increments reference counts regardless of device state. | |
3044 | */ | |
3045 | mutex_lock(&ap->scsi_host->scan_mutex); | |
3046 | spin_lock_irqsave(ap->lock, flags); | |
3047 | ||
3048 | /* clearing dev->sdev is protected by host lock */ | |
3049 | sdev = dev->sdev; | |
3050 | dev->sdev = NULL; | |
3051 | ||
3052 | if (sdev) { | |
3053 | /* If user initiated unplug races with us, sdev can go | |
3054 | * away underneath us after the host lock and | |
3055 | * scan_mutex are released. Hold onto it. | |
3056 | */ | |
3057 | if (scsi_device_get(sdev) == 0) { | |
3058 | /* The following ensures the attached sdev is | |
3059 | * offline on return from ata_scsi_offline_dev() | |
3060 | * regardless it wins or loses the race | |
3061 | * against this function. | |
3062 | */ | |
3063 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
3064 | } else { | |
3065 | WARN_ON(1); | |
3066 | sdev = NULL; | |
3067 | } | |
3068 | } | |
3069 | ||
3070 | spin_unlock_irqrestore(ap->lock, flags); | |
3071 | mutex_unlock(&ap->scsi_host->scan_mutex); | |
3072 | ||
3073 | if (sdev) { | |
3074 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3075 | sdev->sdev_gendev.bus_id); | |
3076 | ||
3077 | scsi_remove_device(sdev); | |
3078 | scsi_device_put(sdev); | |
3079 | } | |
3080 | } | |
3081 | ||
3082 | /** | |
3083 | * ata_scsi_hotplug - SCSI part of hotplug | |
3084 | * @data: Pointer to ATA port to perform SCSI hotplug on | |
3085 | * | |
3086 | * Perform SCSI part of hotplug. It's executed from a separate | |
3087 | * workqueue after EH completes. This is necessary because SCSI | |
3088 | * hot plugging requires working EH and hot unplugging is | |
3089 | * synchronized with hot plugging with a mutex. | |
3090 | * | |
3091 | * LOCKING: | |
3092 | * Kernel thread context (may sleep). | |
3093 | */ | |
3094 | void ata_scsi_hotplug(void *data) | |
3095 | { | |
3096 | struct ata_port *ap = data; | |
3097 | int i; | |
3098 | ||
3099 | if (ap->pflags & ATA_PFLAG_UNLOADING) { | |
3100 | DPRINTK("ENTER/EXIT - unloading\n"); | |
3101 | return; | |
3102 | } | |
3103 | ||
3104 | DPRINTK("ENTER\n"); | |
3105 | ||
3106 | /* unplug detached devices */ | |
3107 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3108 | struct ata_device *dev = &ap->device[i]; | |
3109 | unsigned long flags; | |
3110 | ||
3111 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3112 | continue; | |
3113 | ||
3114 | spin_lock_irqsave(ap->lock, flags); | |
3115 | dev->flags &= ~ATA_DFLAG_DETACHED; | |
3116 | spin_unlock_irqrestore(ap->lock, flags); | |
3117 | ||
3118 | ata_scsi_remove_dev(dev); | |
3119 | } | |
3120 | ||
3121 | /* scan for new ones */ | |
3122 | ata_scsi_scan_host(ap); | |
3123 | ||
3124 | /* If we scanned while EH was in progress, scan would have | |
3125 | * failed silently. Requeue if there are enabled but | |
3126 | * unattached devices. | |
3127 | */ | |
3128 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3129 | struct ata_device *dev = &ap->device[i]; | |
3130 | if (ata_dev_enabled(dev) && !dev->sdev) { | |
3131 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ); | |
3132 | break; | |
3133 | } | |
3134 | } | |
3135 | ||
3136 | DPRINTK("EXIT\n"); | |
3137 | } | |
3138 | ||
3139 | /** | |
3140 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3141 | * @shost: SCSI host to scan | |
3142 | * @channel: Channel to scan | |
3143 | * @id: ID to scan | |
3144 | * @lun: LUN to scan | |
3145 | * | |
3146 | * This function is called when user explicitly requests bus | |
3147 | * scan. Set probe pending flag and invoke EH. | |
3148 | * | |
3149 | * LOCKING: | |
3150 | * SCSI layer (we don't care) | |
3151 | * | |
3152 | * RETURNS: | |
3153 | * Zero. | |
3154 | */ | |
3155 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3156 | unsigned int id, unsigned int lun) | |
3157 | { | |
3158 | struct ata_port *ap = ata_shost_to_port(shost); | |
3159 | unsigned long flags; | |
3160 | int rc = 0; | |
3161 | ||
3162 | if (!ap->ops->error_handler) | |
3163 | return -EOPNOTSUPP; | |
3164 | ||
3165 | if ((channel != SCAN_WILD_CARD && channel != 0) || | |
3166 | (lun != SCAN_WILD_CARD && lun != 0)) | |
3167 | return -EINVAL; | |
3168 | ||
3169 | spin_lock_irqsave(ap->lock, flags); | |
3170 | ||
3171 | if (id == SCAN_WILD_CARD) { | |
3172 | ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; | |
3173 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3174 | } else { | |
3175 | struct ata_device *dev = ata_find_dev(ap, id); | |
3176 | ||
3177 | if (dev) { | |
3178 | ap->eh_info.probe_mask |= 1 << dev->devno; | |
3179 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3180 | ap->eh_info.flags |= ATA_EHI_RESUME_LINK; | |
3181 | } else | |
3182 | rc = -EINVAL; | |
3183 | } | |
3184 | ||
3185 | if (rc == 0) | |
3186 | ata_port_schedule_eh(ap); | |
3187 | ||
3188 | spin_unlock_irqrestore(ap->lock, flags); | |
3189 | ||
3190 | return rc; | |
3191 | } | |
3192 | ||
3193 | /** | |
3194 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() | |
3195 | * @data: Pointer to ATA port to perform scsi_rescan_device() | |
3196 | * | |
3197 | * After ATA pass thru (SAT) commands are executed successfully, | |
3198 | * libata need to propagate the changes to SCSI layer. This | |
3199 | * function must be executed from ata_aux_wq such that sdev | |
3200 | * attach/detach don't race with rescan. | |
3201 | * | |
3202 | * LOCKING: | |
3203 | * Kernel thread context (may sleep). | |
3204 | */ | |
3205 | void ata_scsi_dev_rescan(void *data) | |
3206 | { | |
3207 | struct ata_port *ap = data; | |
3208 | struct ata_device *dev; | |
3209 | unsigned int i; | |
3210 | ||
3211 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3212 | dev = &ap->device[i]; | |
3213 | ||
3214 | if (ata_dev_enabled(dev) && dev->sdev) | |
3215 | scsi_rescan_device(&(dev->sdev->sdev_gendev)); | |
3216 | } | |
3217 | } | |
3218 | ||
3219 | /** | |
3220 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
3221 | * @host: ATA host container for all SAS ports | |
3222 | * @port_info: Information from low-level host driver | |
3223 | * @shost: SCSI host that the scsi device is attached to | |
3224 | * | |
3225 | * LOCKING: | |
3226 | * PCI/etc. bus probe sem. | |
3227 | * | |
3228 | * RETURNS: | |
3229 | * ata_port pointer on success / NULL on failure. | |
3230 | */ | |
3231 | ||
3232 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, | |
3233 | struct ata_port_info *port_info, | |
3234 | struct Scsi_Host *shost) | |
3235 | { | |
3236 | struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
3237 | struct ata_probe_ent *ent; | |
3238 | ||
3239 | if (!ap) | |
3240 | return NULL; | |
3241 | ||
3242 | ent = ata_probe_ent_alloc(host->dev, port_info); | |
3243 | if (!ent) { | |
3244 | kfree(ap); | |
3245 | return NULL; | |
3246 | } | |
3247 | ||
3248 | ata_port_init(ap, host, ent, 0); | |
3249 | ap->lock = shost->host_lock; | |
3250 | kfree(ent); | |
3251 | return ap; | |
3252 | } | |
3253 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3254 | ||
3255 | /** | |
3256 | * ata_sas_port_start - Set port up for dma. | |
3257 | * @ap: Port to initialize | |
3258 | * | |
3259 | * Called just after data structures for each port are | |
3260 | * initialized. Allocates DMA pad. | |
3261 | * | |
3262 | * May be used as the port_start() entry in ata_port_operations. | |
3263 | * | |
3264 | * LOCKING: | |
3265 | * Inherited from caller. | |
3266 | */ | |
3267 | int ata_sas_port_start(struct ata_port *ap) | |
3268 | { | |
3269 | return ata_pad_alloc(ap, ap->dev); | |
3270 | } | |
3271 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3272 | ||
3273 | /** | |
3274 | * ata_port_stop - Undo ata_sas_port_start() | |
3275 | * @ap: Port to shut down | |
3276 | * | |
3277 | * Frees the DMA pad. | |
3278 | * | |
3279 | * May be used as the port_stop() entry in ata_port_operations. | |
3280 | * | |
3281 | * LOCKING: | |
3282 | * Inherited from caller. | |
3283 | */ | |
3284 | ||
3285 | void ata_sas_port_stop(struct ata_port *ap) | |
3286 | { | |
3287 | ata_pad_free(ap, ap->dev); | |
3288 | } | |
3289 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3290 | ||
3291 | /** | |
3292 | * ata_sas_port_init - Initialize a SATA device | |
3293 | * @ap: SATA port to initialize | |
3294 | * | |
3295 | * LOCKING: | |
3296 | * PCI/etc. bus probe sem. | |
3297 | * | |
3298 | * RETURNS: | |
3299 | * Zero on success, non-zero on error. | |
3300 | */ | |
3301 | ||
3302 | int ata_sas_port_init(struct ata_port *ap) | |
3303 | { | |
3304 | int rc = ap->ops->port_start(ap); | |
3305 | ||
3306 | if (!rc) | |
3307 | rc = ata_bus_probe(ap); | |
3308 | ||
3309 | return rc; | |
3310 | } | |
3311 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3312 | ||
3313 | /** | |
3314 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3315 | * @ap: SATA port to destroy | |
3316 | * | |
3317 | */ | |
3318 | ||
3319 | void ata_sas_port_destroy(struct ata_port *ap) | |
3320 | { | |
3321 | ap->ops->port_stop(ap); | |
3322 | kfree(ap); | |
3323 | } | |
3324 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3325 | ||
3326 | /** | |
3327 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3328 | * @sdev: SCSI device to configure | |
3329 | * @ap: ATA port to which SCSI device is attached | |
3330 | * | |
3331 | * RETURNS: | |
3332 | * Zero. | |
3333 | */ | |
3334 | ||
3335 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3336 | { | |
3337 | ata_scsi_sdev_config(sdev); | |
3338 | ata_scsi_dev_config(sdev, ap->device); | |
3339 | return 0; | |
3340 | } | |
3341 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3342 | ||
3343 | /** | |
3344 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3345 | * @cmd: SCSI command to be sent | |
3346 | * @done: Completion function, called when command is complete | |
3347 | * @ap: ATA port to which the command is being sent | |
3348 | * | |
3349 | * RETURNS: | |
3350 | * Zero. | |
3351 | */ | |
3352 | ||
3353 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3354 | struct ata_port *ap) | |
3355 | { | |
3356 | ata_scsi_dump_cdb(ap, cmd); | |
3357 | ||
3358 | if (likely(ata_scsi_dev_enabled(ap->device))) | |
3359 | __ata_scsi_queuecmd(cmd, done, ap->device); | |
3360 | else { | |
3361 | cmd->result = (DID_BAD_TARGET << 16); | |
3362 | done(cmd); | |
3363 | } | |
3364 | return 0; | |
3365 | } | |
3366 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |