]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
1da177e4 | 40 | #include <scsi/scsi_host.h> |
beb40487 | 41 | #include <scsi/scsi_cmnd.h> |
85837ebd | 42 | #include <scsi/scsi_eh.h> |
005a5a06 | 43 | #include <scsi/scsi_device.h> |
a6e6ce8e | 44 | #include <scsi/scsi_tcq.h> |
30afc84c | 45 | #include <scsi/scsi_transport.h> |
1da177e4 | 46 | #include <linux/libata.h> |
b095518e | 47 | #include <linux/hdreg.h> |
1da177e4 LT |
48 | #include <asm/uaccess.h> |
49 | ||
50 | #include "libata.h" | |
51 | ||
b095518e JG |
52 | #define SECTOR_SIZE 512 |
53 | ||
ad706991 | 54 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); |
ab5b3a5b TH |
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); | |
83c47bcb TH |
60 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
61 | unsigned int id, unsigned int lun); | |
ab5b3a5b | 62 | |
1da177e4 | 63 | |
00ac37f5 DG |
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 | ||
30afc84c TH |
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 = { | |
9227c33d | 108 | .eh_strategy_handler = ata_scsi_error, |
30afc84c | 109 | .eh_timed_out = ata_scsi_timed_out, |
ccf68c34 | 110 | .user_scan = ata_scsi_user_scan, |
30afc84c TH |
111 | }; |
112 | ||
1da177e4 | 113 | |
ae006510 DG |
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 | ||
1da177e4 LT |
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 | ||
b095518e JG |
151 | /** |
152 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl | |
8e8b77dd | 153 | * @scsidev: Device to which we are issuing command |
b095518e JG |
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]; | |
bbe1fe7e | 167 | u8 args[4], *argbuf = NULL, *sensebuf = NULL; |
b095518e | 168 | int argsize = 0; |
85837ebd | 169 | enum dma_data_direction data_dir; |
bbe1fe7e | 170 | int cmd_result; |
b095518e | 171 | |
c893a3ae | 172 | if (arg == NULL) |
b095518e JG |
173 | return -EINVAL; |
174 | ||
175 | if (copy_from_user(args, arg, sizeof(args))) | |
176 | return -EFAULT; | |
177 | ||
bbe1fe7e ET |
178 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
179 | if (!sensebuf) | |
180 | return -ENOMEM; | |
181 | ||
b095518e JG |
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); | |
54dac83c JR |
187 | if (argbuf == NULL) { |
188 | rc = -ENOMEM; | |
189 | goto error; | |
190 | } | |
b095518e JG |
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 */ | |
85837ebd | 195 | data_dir = DMA_FROM_DEVICE; |
b095518e JG |
196 | } else { |
197 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
bbe1fe7e | 198 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
85837ebd | 199 | data_dir = DMA_NONE; |
b095518e JG |
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... */ | |
bbe1fe7e ET |
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) { | |
b095518e JG |
248 | rc = -EIO; |
249 | goto error; | |
250 | } | |
251 | ||
b095518e | 252 | if ((argbuf) |
c893a3ae | 253 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
b095518e JG |
254 | rc = -EFAULT; |
255 | error: | |
bbe1fe7e | 256 | kfree(sensebuf); |
8f760780 | 257 | kfree(argbuf); |
b095518e JG |
258 | return rc; |
259 | } | |
260 | ||
261 | /** | |
262 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl | |
8e8b77dd | 263 | * @scsidev: Device to which we are issuing command |
b095518e JG |
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]; | |
85837ebd | 277 | struct scsi_sense_hdr sshdr; |
b095518e | 278 | |
c893a3ae | 279 | if (arg == NULL) |
b095518e JG |
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 | ||
b095518e | 296 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 297 | from scsi_ioctl_send_command() for default case... */ |
85837ebd MC |
298 | if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr, |
299 | (10*HZ), 5)) | |
b095518e | 300 | rc = -EIO; |
b095518e JG |
301 | |
302 | /* Need code to retrieve data from check condition? */ | |
b095518e JG |
303 | return rc; |
304 | } | |
305 | ||
1da177e4 LT |
306 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
307 | { | |
1da177e4 LT |
308 | int val = -EINVAL, rc = -EINVAL; |
309 | ||
1da177e4 LT |
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 | ||
b095518e JG |
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 | ||
1da177e4 LT |
333 | default: |
334 | rc = -ENOTTY; | |
335 | break; | |
336 | } | |
337 | ||
1da177e4 LT |
338 | return rc; |
339 | } | |
340 | ||
341 | /** | |
342 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
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: | |
cca3974e | 356 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
357 | * |
358 | * RETURNS: | |
359 | * Command allocated, or %NULL if none available. | |
360 | */ | |
3373efd8 | 361 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
1da177e4 LT |
362 | struct scsi_cmnd *cmd, |
363 | void (*done)(struct scsi_cmnd *)) | |
364 | { | |
365 | struct ata_queued_cmd *qc; | |
366 | ||
3373efd8 | 367 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
368 | if (qc) { |
369 | qc->scsicmd = cmd; | |
370 | qc->scsidone = done; | |
371 | ||
372 | if (cmd->use_sg) { | |
cedc9a47 | 373 | qc->__sg = (struct scatterlist *) cmd->request_buffer; |
1da177e4 | 374 | qc->n_elem = cmd->use_sg; |
7a801184 | 375 | } else if (cmd->request_bufflen) { |
cedc9a47 | 376 | qc->__sg = &qc->sgent; |
1da177e4 LT |
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 | ||
b095518e JG |
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 | ||
d6f26d1f TH |
432 | /** |
433 | * ata_scsi_device_suspend - suspend ATA device associated with sdev | |
434 | * @sdev: the SCSI device to suspend | |
3c5100c1 | 435 | * @mesg: target power management message |
d6f26d1f TH |
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 | */ | |
3c5100c1 | 446 | int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg) |
9b847548 | 447 | { |
35bb94b1 | 448 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
d6f26d1f TH |
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; | |
3c5100c1 | 473 | if (mesg.event != PM_EVENT_SUSPEND) |
d6f26d1f TH |
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); | |
9b847548 | 480 | |
d6f26d1f TH |
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) | |
3c5100c1 | 498 | sdev->sdev_gendev.power.power_state = mesg; |
d6f26d1f | 499 | return rc; |
9b847548 JA |
500 | } |
501 | ||
d6f26d1f TH |
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) | |
9b847548 | 517 | { |
35bb94b1 | 518 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
d6f26d1f TH |
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; | |
9b847548 JA |
555 | } |
556 | ||
1da177e4 LT |
557 | /** |
558 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 559 | * @id: ATA device number |
1da177e4 | 560 | * @drv_stat: value contained in ATA status register |
b095518e JG |
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 | |
246619da | 565 | * @verbose: be verbose |
1da177e4 | 566 | * |
b095518e JG |
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. | |
1da177e4 LT |
570 | * |
571 | * LOCKING: | |
cca3974e | 572 | * spin_lock_irqsave(host lock) |
1da177e4 | 573 | */ |
2e9edbf8 | 574 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
246619da | 575 | u8 *ascq, int verbose) |
1da177e4 | 576 | { |
b095518e | 577 | int i; |
ffe75ef6 | 578 | |
1da177e4 | 579 | /* Based on the 3ware driver translation table */ |
98ac62de | 580 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
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 | }; | |
98ac62de | 611 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
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 | }; | |
1da177e4 | 619 | |
1da177e4 LT |
620 | /* |
621 | * Is this an error we can process/parse | |
622 | */ | |
b095518e JG |
623 | if (drv_stat & ATA_BUSY) { |
624 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 625 | } |
b095518e JG |
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 */ | |
2e9edbf8 | 631 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
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 */ | |
246619da TH |
640 | if (verbose) |
641 | printk(KERN_WARNING "ata%u: no sense translation for " | |
642 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 643 | } |
b095518e JG |
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; | |
1da177e4 | 652 | } |
b095518e JG |
653 | } |
654 | /* No error? Undecoded? */ | |
246619da TH |
655 | if (verbose) |
656 | printk(KERN_WARNING "ata%u: no sense translation for " | |
657 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 658 | |
2d202024 AC |
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; | |
b095518e JG |
664 | |
665 | translate_done: | |
246619da TH |
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); | |
b095518e JG |
670 | return; |
671 | } | |
672 | ||
673 | /* | |
750426aa | 674 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
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: | |
750426aa | 684 | * None. |
b095518e | 685 | */ |
750426aa | 686 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
687 | { |
688 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 689 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
690 | unsigned char *sb = cmd->sense_buffer; |
691 | unsigned char *desc = sb + 8; | |
246619da | 692 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
693 | |
694 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
695 | ||
0e5dec47 | 696 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 697 | |
b095518e JG |
698 | /* |
699 | * Use ata_to_sense_error() to map status register bits | |
700 | * onto sense key, asc & ascq. | |
701 | */ | |
058e55e1 TH |
702 | if (qc->err_mask || |
703 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
b095518e | 704 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
246619da | 705 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 706 | sb[1] &= 0x0f; |
1da177e4 LT |
707 | } |
708 | ||
b095518e JG |
709 | /* |
710 | * Sense data is current and format is descriptor. | |
711 | */ | |
712 | sb[0] = 0x72; | |
1da177e4 | 713 | |
b095518e JG |
714 | desc[0] = 0x09; |
715 | ||
f38621b3 TH |
716 | /* set length of additional sense data */ |
717 | sb[7] = 14; | |
718 | desc[1] = 12; | |
b095518e JG |
719 | |
720 | /* | |
721 | * Copy registers into sense buffer. | |
722 | */ | |
723 | desc[2] = 0x00; | |
724 | desc[3] = tf->feature; /* == error reg */ | |
725 | desc[5] = tf->nsect; | |
726 | desc[7] = tf->lbal; | |
727 | desc[9] = tf->lbam; | |
728 | desc[11] = tf->lbah; | |
729 | desc[12] = tf->device; | |
730 | desc[13] = tf->command; /* == status reg */ | |
731 | ||
732 | /* | |
733 | * Fill in Extend bit, and the high order bytes | |
734 | * if applicable. | |
735 | */ | |
736 | if (tf->flags & ATA_TFLAG_LBA48) { | |
737 | desc[2] |= 0x01; | |
738 | desc[4] = tf->hob_nsect; | |
739 | desc[6] = tf->hob_lbal; | |
740 | desc[8] = tf->hob_lbam; | |
741 | desc[10] = tf->hob_lbah; | |
1da177e4 | 742 | } |
b095518e | 743 | } |
1da177e4 | 744 | |
b095518e | 745 | /** |
750426aa | 746 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
747 | * @qc: Command that we are erroring out |
748 | * | |
d25614ba TH |
749 | * Generate sense block for a failed ATA command @qc. Descriptor |
750 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
751 | * |
752 | * LOCKING: | |
750426aa | 753 | * None. |
b095518e | 754 | */ |
750426aa | 755 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 756 | { |
d25614ba | 757 | struct ata_device *dev = qc->dev; |
b095518e | 758 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 759 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 760 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 761 | unsigned char *desc = sb + 8; |
246619da | 762 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 763 | u64 block; |
b095518e JG |
764 | |
765 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
766 | ||
0e5dec47 | 767 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 768 | |
d25614ba TH |
769 | /* sense data is current and format is descriptor */ |
770 | sb[0] = 0x72; | |
771 | ||
772 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
773 | * onto sense key, asc & ascq. |
774 | */ | |
058e55e1 TH |
775 | if (qc->err_mask || |
776 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
b095518e | 777 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
d25614ba TH |
778 | &sb[1], &sb[2], &sb[3], verbose); |
779 | sb[1] &= 0x0f; | |
1da177e4 | 780 | } |
1da177e4 | 781 | |
d25614ba | 782 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 783 | |
d25614ba TH |
784 | /* information sense data descriptor */ |
785 | sb[7] = 12; | |
786 | desc[0] = 0x00; | |
787 | desc[1] = 10; | |
a7dac447 | 788 | |
d25614ba TH |
789 | desc[2] |= 0x80; /* valid */ |
790 | desc[6] = block >> 40; | |
791 | desc[7] = block >> 32; | |
792 | desc[8] = block >> 24; | |
793 | desc[9] = block >> 16; | |
794 | desc[10] = block >> 8; | |
795 | desc[11] = block; | |
1da177e4 LT |
796 | } |
797 | ||
a6cce2a7 BK |
798 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
799 | { | |
800 | sdev->use_10_for_rw = 1; | |
801 | sdev->use_10_for_ms = 1; | |
802 | } | |
803 | ||
804 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
805 | struct ata_device *dev) | |
806 | { | |
914ed354 TH |
807 | /* configure max sectors */ |
808 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 809 | |
914ed354 | 810 | /* SATA DMA transfers must be multiples of 4 byte, so |
a6cce2a7 BK |
811 | * we need to pad ATAPI transfers using an extra sg. |
812 | * Decrement max hw segments accordingly. | |
813 | */ | |
814 | if (dev->class == ATA_DEV_ATAPI) { | |
815 | request_queue_t *q = sdev->request_queue; | |
816 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); | |
817 | } | |
a6e6ce8e TH |
818 | |
819 | if (dev->flags & ATA_DFLAG_NCQ) { | |
820 | int depth; | |
821 | ||
822 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
823 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
824 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
825 | } | |
a6cce2a7 BK |
826 | } |
827 | ||
1da177e4 LT |
828 | /** |
829 | * ata_scsi_slave_config - Set SCSI device attributes | |
830 | * @sdev: SCSI device to examine | |
831 | * | |
832 | * This is called before we actually start reading | |
833 | * and writing to the device, to configure certain | |
834 | * SCSI mid-layer behaviors. | |
835 | * | |
836 | * LOCKING: | |
837 | * Defined by SCSI layer. We don't really care. | |
838 | */ | |
839 | ||
840 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
841 | { | |
31534363 TH |
842 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
843 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
844 | ||
a6cce2a7 | 845 | ata_scsi_sdev_config(sdev); |
1da177e4 LT |
846 | |
847 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
848 | ||
31534363 | 849 | if (dev) |
a6cce2a7 | 850 | ata_scsi_dev_config(sdev, dev); |
1da177e4 LT |
851 | |
852 | return 0; /* scsi layer doesn't check return value, sigh */ | |
853 | } | |
854 | ||
83c47bcb TH |
855 | /** |
856 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
857 | * @sdev: SCSI device to be destroyed | |
858 | * | |
859 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
860 | * this unplugging was initiated by libata as indicated by NULL | |
861 | * dev->sdev, this function doesn't have to do anything. | |
862 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
863 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
864 | * EH. | |
865 | * | |
866 | * LOCKING: | |
867 | * Defined by SCSI layer. We don't really care. | |
868 | */ | |
869 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
870 | { | |
871 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
872 | unsigned long flags; | |
873 | struct ata_device *dev; | |
874 | ||
875 | if (!ap->ops->error_handler) | |
876 | return; | |
877 | ||
ba6a1308 | 878 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
879 | dev = __ata_scsi_find_dev(ap, sdev); |
880 | if (dev && dev->sdev) { | |
881 | /* SCSI device already in CANCEL state, no need to offline it */ | |
882 | dev->sdev = NULL; | |
883 | dev->flags |= ATA_DFLAG_DETACH; | |
884 | ata_port_schedule_eh(ap); | |
885 | } | |
ba6a1308 | 886 | spin_unlock_irqrestore(ap->lock, flags); |
83c47bcb TH |
887 | } |
888 | ||
a6e6ce8e TH |
889 | /** |
890 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
891 | * @sdev: SCSI device to configure queue depth for | |
892 | * @queue_depth: new queue depth | |
893 | * | |
894 | * This is libata standard hostt->change_queue_depth callback. | |
895 | * SCSI will call into this callback when user tries to set queue | |
896 | * depth via sysfs. | |
897 | * | |
898 | * LOCKING: | |
899 | * SCSI layer (we don't care) | |
900 | * | |
901 | * RETURNS: | |
902 | * Newly configured queue depth. | |
903 | */ | |
904 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
905 | { | |
906 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
907 | struct ata_device *dev; | |
360f654e | 908 | unsigned long flags; |
a6e6ce8e TH |
909 | int max_depth; |
910 | ||
911 | if (queue_depth < 1) | |
912 | return sdev->queue_depth; | |
913 | ||
914 | dev = ata_scsi_find_dev(ap, sdev); | |
915 | if (!dev || !ata_dev_enabled(dev)) | |
916 | return sdev->queue_depth; | |
917 | ||
918 | max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
919 | max_depth = min(ATA_MAX_QUEUE - 1, max_depth); | |
920 | if (queue_depth > max_depth) | |
921 | queue_depth = max_depth; | |
922 | ||
923 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
360f654e TH |
924 | |
925 | spin_lock_irqsave(ap->lock, flags); | |
926 | if (queue_depth > 1) | |
927 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; | |
928 | else | |
929 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
930 | spin_unlock_irqrestore(ap->lock, flags); | |
931 | ||
a6e6ce8e TH |
932 | return queue_depth; |
933 | } | |
934 | ||
972dcafb DG |
935 | /** |
936 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
937 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
938 | * |
939 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
940 | * (to start). Perhaps these commands should be preceded by | |
941 | * CHECK POWER MODE to see what power mode the device is already in. | |
942 | * [See SAT revision 5 at www.t10.org] | |
943 | * | |
944 | * LOCKING: | |
cca3974e | 945 | * spin_lock_irqsave(host lock) |
972dcafb DG |
946 | * |
947 | * RETURNS: | |
948 | * Zero on success, non-zero on error. | |
949 | */ | |
ad706991 | 950 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 951 | { |
542b1444 | 952 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 953 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 954 | const u8 *cdb = scmd->cmnd; |
972dcafb | 955 | |
2e5704f6 TH |
956 | if (scmd->cmd_len < 5) |
957 | goto invalid_fld; | |
958 | ||
972dcafb DG |
959 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
960 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 961 | if (cdb[1] & 0x1) { |
972dcafb DG |
962 | ; /* ignore IMMED bit, violates sat-r05 */ |
963 | } | |
542b1444 | 964 | if (cdb[4] & 0x2) |
ae006510 | 965 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 966 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 967 | goto invalid_fld; /* power conditions not supported */ |
542b1444 | 968 | if (cdb[4] & 0x1) { |
972dcafb | 969 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
970 | |
971 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 972 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
973 | |
974 | tf->lbah = 0x0; | |
975 | tf->lbam = 0x0; | |
976 | tf->lbal = 0x0; | |
977 | tf->device |= ATA_LBA; | |
978 | } else { | |
979 | /* CHS */ | |
980 | tf->lbal = 0x1; /* sect */ | |
981 | tf->lbam = 0x0; /* cyl low */ | |
982 | tf->lbah = 0x0; /* cyl high */ | |
983 | } | |
984 | ||
972dcafb DG |
985 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
986 | } else { | |
987 | tf->nsect = 0; /* time period value (0 implies now) */ | |
988 | tf->command = ATA_CMD_STANDBY; | |
989 | /* Consider: ATA STANDBY IMMEDIATE command */ | |
990 | } | |
991 | /* | |
992 | * Standby and Idle condition timers could be implemented but that | |
993 | * would require libata to implement the Power condition mode page | |
994 | * and allow the user to change it. Changing mode pages requires | |
995 | * MODE SELECT to be implemented. | |
996 | */ | |
997 | ||
998 | return 0; | |
ae006510 DG |
999 | |
1000 | invalid_fld: | |
542b1444 | 1001 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1002 | /* "Invalid field in cbd" */ |
1003 | return 1; | |
972dcafb DG |
1004 | } |
1005 | ||
1006 | ||
1da177e4 LT |
1007 | /** |
1008 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1009 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1010 | * |
1011 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1012 | * FLUSH CACHE EXT. | |
1013 | * | |
1014 | * LOCKING: | |
cca3974e | 1015 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1016 | * |
1017 | * RETURNS: | |
1018 | * Zero on success, non-zero on error. | |
1019 | */ | |
ad706991 | 1020 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1021 | { |
1022 | struct ata_taskfile *tf = &qc->tf; | |
1023 | ||
1024 | tf->flags |= ATA_TFLAG_DEVICE; | |
1025 | tf->protocol = ATA_PROT_NODATA; | |
1026 | ||
6fc49adb | 1027 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1028 | tf->command = ATA_CMD_FLUSH_EXT; |
1029 | else | |
1030 | tf->command = ATA_CMD_FLUSH; | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
3aef5231 AL |
1035 | /** |
1036 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1037 | * @cdb: SCSI command to translate |
3aef5231 AL |
1038 | * |
1039 | * Calculate LBA and transfer length for 6-byte commands. | |
1040 | * | |
1041 | * RETURNS: | |
1042 | * @plba: the LBA | |
1043 | * @plen: the transfer length | |
1044 | */ | |
542b1444 | 1045 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1046 | { |
1047 | u64 lba = 0; | |
1048 | u32 len = 0; | |
1049 | ||
1050 | VPRINTK("six-byte command\n"); | |
1051 | ||
542b1444 TH |
1052 | lba |= ((u64)cdb[2]) << 8; |
1053 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1054 | |
542b1444 | 1055 | len |= ((u32)cdb[4]); |
3aef5231 AL |
1056 | |
1057 | *plba = lba; | |
1058 | *plen = len; | |
1059 | } | |
1060 | ||
1061 | /** | |
1062 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1063 | * @cdb: SCSI command to translate |
3aef5231 AL |
1064 | * |
1065 | * Calculate LBA and transfer length for 10-byte commands. | |
1066 | * | |
1067 | * RETURNS: | |
1068 | * @plba: the LBA | |
1069 | * @plen: the transfer length | |
1070 | */ | |
542b1444 | 1071 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1072 | { |
1073 | u64 lba = 0; | |
1074 | u32 len = 0; | |
1075 | ||
1076 | VPRINTK("ten-byte command\n"); | |
1077 | ||
542b1444 TH |
1078 | lba |= ((u64)cdb[2]) << 24; |
1079 | lba |= ((u64)cdb[3]) << 16; | |
1080 | lba |= ((u64)cdb[4]) << 8; | |
1081 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1082 | |
542b1444 TH |
1083 | len |= ((u32)cdb[7]) << 8; |
1084 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1085 | |
1086 | *plba = lba; | |
1087 | *plen = len; | |
1088 | } | |
1089 | ||
1090 | /** | |
1091 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1092 | * @cdb: SCSI command to translate |
3aef5231 AL |
1093 | * |
1094 | * Calculate LBA and transfer length for 16-byte commands. | |
1095 | * | |
1096 | * RETURNS: | |
1097 | * @plba: the LBA | |
1098 | * @plen: the transfer length | |
1099 | */ | |
542b1444 | 1100 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1101 | { |
1102 | u64 lba = 0; | |
1103 | u32 len = 0; | |
1104 | ||
1105 | VPRINTK("sixteen-byte command\n"); | |
1106 | ||
542b1444 TH |
1107 | lba |= ((u64)cdb[2]) << 56; |
1108 | lba |= ((u64)cdb[3]) << 48; | |
1109 | lba |= ((u64)cdb[4]) << 40; | |
1110 | lba |= ((u64)cdb[5]) << 32; | |
1111 | lba |= ((u64)cdb[6]) << 24; | |
1112 | lba |= ((u64)cdb[7]) << 16; | |
1113 | lba |= ((u64)cdb[8]) << 8; | |
1114 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1115 | |
542b1444 TH |
1116 | len |= ((u32)cdb[10]) << 24; |
1117 | len |= ((u32)cdb[11]) << 16; | |
1118 | len |= ((u32)cdb[12]) << 8; | |
1119 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1120 | |
1121 | *plba = lba; | |
1122 | *plen = len; | |
1123 | } | |
1124 | ||
1da177e4 LT |
1125 | /** |
1126 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1127 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1128 | * |
1129 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1130 | * | |
1131 | * LOCKING: | |
cca3974e | 1132 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1133 | * |
1134 | * RETURNS: | |
1135 | * Zero on success, non-zero on error. | |
1136 | */ | |
ad706991 | 1137 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1138 | { |
542b1444 | 1139 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1140 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1141 | struct ata_device *dev = qc->dev; |
1da177e4 | 1142 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1143 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1144 | u64 block; |
1145 | u32 n_block; | |
1da177e4 LT |
1146 | |
1147 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1148 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1149 | |
2e5704f6 TH |
1150 | if (cdb[0] == VERIFY) { |
1151 | if (scmd->cmd_len < 10) | |
1152 | goto invalid_fld; | |
542b1444 | 1153 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1154 | } else if (cdb[0] == VERIFY_16) { |
1155 | if (scmd->cmd_len < 16) | |
1156 | goto invalid_fld; | |
542b1444 | 1157 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1158 | } else |
ae006510 | 1159 | goto invalid_fld; |
1da177e4 | 1160 | |
8bf62ece | 1161 | if (!n_block) |
ae006510 | 1162 | goto nothing_to_do; |
8bf62ece | 1163 | if (block >= dev_sectors) |
ae006510 | 1164 | goto out_of_range; |
8bf62ece | 1165 | if ((block + n_block) > dev_sectors) |
ae006510 | 1166 | goto out_of_range; |
1da177e4 | 1167 | |
07506697 AL |
1168 | if (dev->flags & ATA_DFLAG_LBA) { |
1169 | tf->flags |= ATA_TFLAG_LBA; | |
1170 | ||
c6a33e24 AL |
1171 | if (lba_28_ok(block, n_block)) { |
1172 | /* use LBA28 */ | |
1173 | tf->command = ATA_CMD_VERIFY; | |
1174 | tf->device |= (block >> 24) & 0xf; | |
1175 | } else if (lba_48_ok(block, n_block)) { | |
1176 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1177 | goto out_of_range; | |
07506697 AL |
1178 | |
1179 | /* use LBA48 */ | |
1180 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1181 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1182 | |
8bf62ece | 1183 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1184 | |
8bf62ece AL |
1185 | tf->hob_lbah = (block >> 40) & 0xff; |
1186 | tf->hob_lbam = (block >> 32) & 0xff; | |
1187 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1188 | } else |
1189 | /* request too large even for LBA48 */ | |
1190 | goto out_of_range; | |
8bf62ece AL |
1191 | |
1192 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1193 | |
8bf62ece AL |
1194 | tf->lbah = (block >> 16) & 0xff; |
1195 | tf->lbam = (block >> 8) & 0xff; | |
1196 | tf->lbal = block & 0xff; | |
1da177e4 | 1197 | |
8bf62ece AL |
1198 | tf->device |= ATA_LBA; |
1199 | } else { | |
1200 | /* CHS */ | |
1201 | u32 sect, head, cyl, track; | |
1202 | ||
c6a33e24 AL |
1203 | if (!lba_28_ok(block, n_block)) |
1204 | goto out_of_range; | |
07506697 | 1205 | |
8bf62ece AL |
1206 | /* Convert LBA to CHS */ |
1207 | track = (u32)block / dev->sectors; | |
1208 | cyl = track / dev->heads; | |
1209 | head = track % dev->heads; | |
1210 | sect = (u32)block % dev->sectors + 1; | |
1211 | ||
c187c4b5 AL |
1212 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1213 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1214 | |
1215 | /* Check whether the converted CHS can fit. | |
1216 | Cylinder: 0-65535 | |
8bf62ece AL |
1217 | Head: 0-15 |
1218 | Sector: 1-255*/ | |
2e9edbf8 | 1219 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1220 | goto out_of_range; |
2e9edbf8 | 1221 | |
8bf62ece AL |
1222 | tf->command = ATA_CMD_VERIFY; |
1223 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1224 | tf->lbal = sect; | |
1225 | tf->lbam = cyl; | |
1226 | tf->lbah = cyl >> 8; | |
1227 | tf->device |= head; | |
1228 | } | |
1da177e4 LT |
1229 | |
1230 | return 0; | |
ae006510 DG |
1231 | |
1232 | invalid_fld: | |
542b1444 | 1233 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1234 | /* "Invalid field in cbd" */ |
1235 | return 1; | |
1236 | ||
1237 | out_of_range: | |
542b1444 | 1238 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1239 | /* "Logical Block Address out of range" */ |
1240 | return 1; | |
1241 | ||
1242 | nothing_to_do: | |
542b1444 | 1243 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1244 | return 1; |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | /** | |
1248 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1249 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1250 | * |
1251 | * Converts any of six SCSI read/write commands into the | |
1252 | * ATA counterpart, including starting sector (LBA), | |
1253 | * sector count, and taking into account the device's LBA48 | |
1254 | * support. | |
1255 | * | |
1256 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1257 | * %WRITE_16 are currently supported. | |
1258 | * | |
1259 | * LOCKING: | |
cca3974e | 1260 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1261 | * |
1262 | * RETURNS: | |
1263 | * Zero on success, non-zero on error. | |
1264 | */ | |
ad706991 | 1265 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1266 | { |
542b1444 | 1267 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1268 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1269 | unsigned int tf_flags = 0; |
3aef5231 AL |
1270 | u64 block; |
1271 | u32 n_block; | |
bd056d7e | 1272 | int rc; |
1da177e4 | 1273 | |
542b1444 | 1274 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1275 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1276 | |
9a3dccc4 | 1277 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1278 | switch (cdb[0]) { |
3aef5231 AL |
1279 | case READ_10: |
1280 | case WRITE_10: | |
2e5704f6 TH |
1281 | if (unlikely(scmd->cmd_len < 10)) |
1282 | goto invalid_fld; | |
542b1444 TH |
1283 | scsi_10_lba_len(cdb, &block, &n_block); |
1284 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1285 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1286 | break; |
1287 | case READ_6: | |
1288 | case WRITE_6: | |
2e5704f6 TH |
1289 | if (unlikely(scmd->cmd_len < 6)) |
1290 | goto invalid_fld; | |
542b1444 | 1291 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1292 | |
1293 | /* for 6-byte r/w commands, transfer length 0 | |
1294 | * means 256 blocks of data, not 0 block. | |
1295 | */ | |
76b2bf9b JG |
1296 | if (!n_block) |
1297 | n_block = 256; | |
3aef5231 AL |
1298 | break; |
1299 | case READ_16: | |
1300 | case WRITE_16: | |
2e5704f6 TH |
1301 | if (unlikely(scmd->cmd_len < 16)) |
1302 | goto invalid_fld; | |
542b1444 TH |
1303 | scsi_16_lba_len(cdb, &block, &n_block); |
1304 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1305 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1306 | break; |
1307 | default: | |
8bf62ece | 1308 | DPRINTK("no-byte command\n"); |
ae006510 | 1309 | goto invalid_fld; |
1da177e4 LT |
1310 | } |
1311 | ||
8bf62ece AL |
1312 | /* Check and compose ATA command */ |
1313 | if (!n_block) | |
c187c4b5 AL |
1314 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1315 | * length 0 means transfer 0 block of data. | |
1316 | * However, for ATA R/W commands, sector count 0 means | |
1317 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1318 | * |
1319 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1320 | */ |
ae006510 | 1321 | goto nothing_to_do; |
1da177e4 | 1322 | |
bd056d7e TH |
1323 | qc->flags |= ATA_QCFLAG_IO; |
1324 | qc->nsect = n_block; | |
1da177e4 | 1325 | |
bd056d7e TH |
1326 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1327 | qc->tag); | |
1328 | if (likely(rc == 0)) | |
1329 | return 0; | |
ae006510 | 1330 | |
bd056d7e TH |
1331 | if (rc == -ERANGE) |
1332 | goto out_of_range; | |
1333 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1334 | invalid_fld: |
542b1444 | 1335 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1336 | /* "Invalid field in cbd" */ |
1337 | return 1; | |
1338 | ||
1339 | out_of_range: | |
542b1444 | 1340 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1341 | /* "Logical Block Address out of range" */ |
1342 | return 1; | |
1343 | ||
1344 | nothing_to_do: | |
542b1444 | 1345 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1346 | return 1; |
1da177e4 LT |
1347 | } |
1348 | ||
77853bf2 | 1349 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1350 | { |
c31f571d | 1351 | struct ata_port *ap = qc->ap; |
1da177e4 | 1352 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1353 | u8 *cdb = cmd->cmnd; |
a22e2eb0 | 1354 | int need_sense = (qc->err_mask != 0); |
b095518e | 1355 | |
3057ac3c | 1356 | /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and |
1357 | * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE | |
1358 | * cache | |
1359 | */ | |
c31f571d TH |
1360 | if (ap->ops->error_handler && |
1361 | !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) && | |
3057ac3c | 1362 | ((qc->tf.feature == SETFEATURES_WC_ON) || |
1363 | (qc->tf.feature == SETFEATURES_WC_OFF))) { | |
c31f571d TH |
1364 | ap->eh_info.action |= ATA_EH_REVALIDATE; |
1365 | ata_port_schedule_eh(ap); | |
3057ac3c | 1366 | } |
1367 | ||
b095518e JG |
1368 | /* For ATA pass thru (SAT) commands, generate a sense block if |
1369 | * user mandated it or if there's an error. Note that if we | |
1370 | * generate because the user forced us to, a check condition | |
1371 | * is generated and the ATA register values are returned | |
1372 | * whether the command completed successfully or not. If there | |
1373 | * was no error, SK, ASC and ASCQ will all be zero. | |
1374 | */ | |
a7dac447 JG |
1375 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
1376 | ((cdb[2] & 0x20) || need_sense)) { | |
750426aa | 1377 | ata_gen_passthru_sense(qc); |
b095518e JG |
1378 | } else { |
1379 | if (!need_sense) { | |
1380 | cmd->result = SAM_STAT_GOOD; | |
1381 | } else { | |
1382 | /* TODO: decide which descriptor format to use | |
1383 | * for 48b LBA devices and call that here | |
1384 | * instead of the fixed desc, which is only | |
1385 | * good for smaller LBA (and maybe CHS?) | |
1386 | * devices. | |
1387 | */ | |
750426aa | 1388 | ata_gen_ata_sense(qc); |
b095518e JG |
1389 | } |
1390 | } | |
1da177e4 | 1391 | |
c31f571d TH |
1392 | if (need_sense && !ap->ops->error_handler) |
1393 | ata_dump_status(ap->id, &qc->result_tf); | |
1da177e4 LT |
1394 | |
1395 | qc->scsidone(cmd); | |
1396 | ||
77853bf2 | 1397 | ata_qc_free(qc); |
1da177e4 LT |
1398 | } |
1399 | ||
3dc1d881 TH |
1400 | /** |
1401 | * ata_scmd_need_defer - Check whether we need to defer scmd | |
1402 | * @dev: ATA device to which the command is addressed | |
1403 | * @is_io: Is the command IO (and thus possibly NCQ)? | |
1404 | * | |
1405 | * NCQ and non-NCQ commands cannot run together. As upper layer | |
1406 | * only knows the queue depth, we are responsible for maintaining | |
1407 | * exclusion. This function checks whether a new command can be | |
1408 | * issued to @dev. | |
1409 | * | |
1410 | * LOCKING: | |
cca3974e | 1411 | * spin_lock_irqsave(host lock) |
3dc1d881 TH |
1412 | * |
1413 | * RETURNS: | |
1414 | * 1 if deferring is needed, 0 otherwise. | |
1415 | */ | |
1416 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) | |
1417 | { | |
1418 | struct ata_port *ap = dev->ap; | |
1419 | ||
1420 | if (!(dev->flags & ATA_DFLAG_NCQ)) | |
1421 | return 0; | |
1422 | ||
1423 | if (is_io) { | |
1424 | if (!ata_tag_valid(ap->active_tag)) | |
1425 | return 0; | |
1426 | } else { | |
1427 | if (!ata_tag_valid(ap->active_tag) && !ap->sactive) | |
1428 | return 0; | |
1429 | } | |
1430 | return 1; | |
1431 | } | |
1432 | ||
1da177e4 LT |
1433 | /** |
1434 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1435 | * @dev: ATA device to which the command is addressed |
1436 | * @cmd: SCSI command to execute | |
1437 | * @done: SCSI command completion function | |
1438 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1439 | * | |
1440 | * Our ->queuecommand() function has decided that the SCSI | |
1441 | * command issued can be directly translated into an ATA | |
1442 | * command, rather than handled internally. | |
1443 | * | |
1444 | * This function sets up an ata_queued_cmd structure for the | |
1445 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1446 | * | |
ae006510 DG |
1447 | * The xlat_func argument (actor) returns 0 if ready to execute |
1448 | * ATA command, else 1 to finish translation. If 1 is returned | |
1449 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1450 | * to be set reflecting an error condition or clean (early) | |
1451 | * termination. | |
1452 | * | |
1da177e4 | 1453 | * LOCKING: |
cca3974e | 1454 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1455 | * |
1456 | * RETURNS: | |
1457 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1458 | * needs to be deferred. | |
1da177e4 | 1459 | */ |
2115ea94 TH |
1460 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1461 | void (*done)(struct scsi_cmnd *), | |
1462 | ata_xlat_func_t xlat_func) | |
1da177e4 LT |
1463 | { |
1464 | struct ata_queued_cmd *qc; | |
3dc1d881 | 1465 | int is_io = xlat_func == ata_scsi_rw_xlat; |
1da177e4 LT |
1466 | |
1467 | VPRINTK("ENTER\n"); | |
1468 | ||
3dc1d881 TH |
1469 | if (unlikely(ata_scmd_need_defer(dev, is_io))) |
1470 | goto defer; | |
1471 | ||
3373efd8 | 1472 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1473 | if (!qc) |
ae006510 | 1474 | goto err_mem; |
1da177e4 LT |
1475 | |
1476 | /* data is present; dma-map it */ | |
be7db055 CH |
1477 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1478 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 | 1479 | if (unlikely(cmd->request_bufflen < 1)) { |
f15a1daf TH |
1480 | ata_dev_printk(dev, KERN_WARNING, |
1481 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1482 | goto err_did; |
1da177e4 LT |
1483 | } |
1484 | ||
1485 | if (cmd->use_sg) | |
1486 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1487 | else | |
1488 | ata_sg_init_one(qc, cmd->request_buffer, | |
1489 | cmd->request_bufflen); | |
1490 | ||
1491 | qc->dma_dir = cmd->sc_data_direction; | |
1492 | } | |
1493 | ||
1494 | qc->complete_fn = ata_scsi_qc_complete; | |
1495 | ||
ad706991 | 1496 | if (xlat_func(qc)) |
ae006510 | 1497 | goto early_finish; |
1da177e4 LT |
1498 | |
1499 | /* select device, send command to hardware */ | |
8e0e694a | 1500 | ata_qc_issue(qc); |
1da177e4 LT |
1501 | |
1502 | VPRINTK("EXIT\n"); | |
2115ea94 | 1503 | return 0; |
1da177e4 | 1504 | |
ae006510 DG |
1505 | early_finish: |
1506 | ata_qc_free(qc); | |
1507 | done(cmd); | |
1508 | DPRINTK("EXIT - early finish (good or error)\n"); | |
2115ea94 | 1509 | return 0; |
ae006510 DG |
1510 | |
1511 | err_did: | |
1da177e4 | 1512 | ata_qc_free(qc); |
ae006510 DG |
1513 | cmd->result = (DID_ERROR << 16); |
1514 | done(cmd); | |
253b92ec | 1515 | err_mem: |
ae006510 | 1516 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1517 | return 0; |
3dc1d881 TH |
1518 | |
1519 | defer: | |
1520 | DPRINTK("EXIT - defer\n"); | |
1521 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1da177e4 LT |
1522 | } |
1523 | ||
1524 | /** | |
1525 | * ata_scsi_rbuf_get - Map response buffer. | |
1526 | * @cmd: SCSI command containing buffer to be mapped. | |
1527 | * @buf_out: Pointer to mapped area. | |
1528 | * | |
1529 | * Maps buffer contained within SCSI command @cmd. | |
1530 | * | |
1531 | * LOCKING: | |
cca3974e | 1532 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1533 | * |
1534 | * RETURNS: | |
1535 | * Length of response buffer. | |
1536 | */ | |
1537 | ||
1538 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1539 | { | |
1540 | u8 *buf; | |
1541 | unsigned int buflen; | |
1542 | ||
1543 | if (cmd->use_sg) { | |
1544 | struct scatterlist *sg; | |
1545 | ||
1546 | sg = (struct scatterlist *) cmd->request_buffer; | |
da02d2a1 | 1547 | buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; |
1da177e4 LT |
1548 | buflen = sg->length; |
1549 | } else { | |
1550 | buf = cmd->request_buffer; | |
1551 | buflen = cmd->request_bufflen; | |
1552 | } | |
1553 | ||
1554 | *buf_out = buf; | |
1555 | return buflen; | |
1556 | } | |
1557 | ||
1558 | /** | |
1559 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1560 | * @cmd: SCSI command containing buffer to be unmapped. | |
1561 | * @buf: buffer to unmap | |
1562 | * | |
1563 | * Unmaps response buffer contained within @cmd. | |
1564 | * | |
1565 | * LOCKING: | |
cca3974e | 1566 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1567 | */ |
1568 | ||
1569 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1570 | { | |
1571 | if (cmd->use_sg) { | |
1572 | struct scatterlist *sg; | |
1573 | ||
1574 | sg = (struct scatterlist *) cmd->request_buffer; | |
da02d2a1 | 1575 | kunmap_atomic(buf - sg->offset, KM_IRQ0); |
1da177e4 LT |
1576 | } |
1577 | } | |
1578 | ||
1579 | /** | |
1580 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1581 | * @args: device IDENTIFY data / SCSI command of interest. | |
1582 | * @actor: Callback hook for desired SCSI command simulator | |
1583 | * | |
1584 | * Takes care of the hard work of simulating a SCSI command... | |
1585 | * Mapping the response buffer, calling the command's handler, | |
1586 | * and handling the handler's return value. This return value | |
1587 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1588 | * completed successfully (0), or not (in which case cmd->result |
1589 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1590 | * |
1591 | * LOCKING: | |
cca3974e | 1592 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1593 | */ |
1594 | ||
1595 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1596 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1597 | u8 *rbuf, unsigned int buflen)) | |
1598 | { | |
1599 | u8 *rbuf; | |
1600 | unsigned int buflen, rc; | |
1601 | struct scsi_cmnd *cmd = args->cmd; | |
1602 | ||
1603 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1604 | memset(rbuf, 0, buflen); | |
1605 | rc = actor(args, rbuf, buflen); | |
1606 | ata_scsi_rbuf_put(cmd, rbuf); | |
1607 | ||
ae006510 | 1608 | if (rc == 0) |
1da177e4 | 1609 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1610 | args->done(cmd); |
1da177e4 LT |
1611 | } |
1612 | ||
6a36261e TH |
1613 | /** |
1614 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1615 | * @idx: byte index into SCSI response buffer | |
1616 | * @val: value to set | |
1617 | * | |
1618 | * To be used by SCSI command simulator functions. This macros | |
1619 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1620 | * are in scope. | |
1621 | * | |
1622 | * LOCKING: | |
1623 | * None. | |
1624 | */ | |
1625 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1626 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1627 | } while (0) | |
1628 | ||
1da177e4 LT |
1629 | /** |
1630 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1631 | * @args: device IDENTIFY data / SCSI command of interest. | |
1632 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1633 | * @buflen: Response buffer length. | |
1634 | * | |
1635 | * Returns standard device identification data associated | |
b142eb65 | 1636 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1637 | * |
1638 | * LOCKING: | |
cca3974e | 1639 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1640 | */ |
1641 | ||
1642 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1643 | unsigned int buflen) | |
1644 | { | |
1645 | u8 hdr[] = { | |
1646 | TYPE_DISK, | |
1647 | 0, | |
1648 | 0x5, /* claim SPC-3 version compatibility */ | |
1649 | 2, | |
1650 | 95 - 4 | |
1651 | }; | |
1652 | ||
1653 | /* set scsi removeable (RMB) bit per ata bit */ | |
1654 | if (ata_id_removeable(args->id)) | |
1655 | hdr[1] |= (1 << 7); | |
1656 | ||
1657 | VPRINTK("ENTER\n"); | |
1658 | ||
1659 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1660 | ||
1661 | if (buflen > 35) { | |
1662 | memcpy(&rbuf[8], "ATA ", 8); | |
6a62a04d TH |
1663 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); |
1664 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1da177e4 LT |
1665 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1666 | memcpy(&rbuf[32], "n/a ", 4); | |
1667 | } | |
1668 | ||
1669 | if (buflen > 63) { | |
1670 | const u8 versions[] = { | |
1671 | 0x60, /* SAM-3 (no version claimed) */ | |
1672 | ||
1673 | 0x03, | |
1674 | 0x20, /* SBC-2 (no version claimed) */ | |
1675 | ||
1676 | 0x02, | |
1677 | 0x60 /* SPC-3 (no version claimed) */ | |
1678 | }; | |
1679 | ||
1680 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1681 | } | |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | /** | |
b142eb65 | 1687 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1688 | * @args: device IDENTIFY data / SCSI command of interest. |
1689 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1690 | * @buflen: Response buffer length. | |
1691 | * | |
b142eb65 | 1692 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1693 | * |
1694 | * LOCKING: | |
cca3974e | 1695 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1696 | */ |
1697 | ||
1698 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1699 | unsigned int buflen) | |
1700 | { | |
1701 | const u8 pages[] = { | |
1702 | 0x00, /* page 0x00, this page */ | |
1703 | 0x80, /* page 0x80, unit serial no page */ | |
1704 | 0x83 /* page 0x83, device ident page */ | |
1705 | }; | |
b142eb65 | 1706 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1707 | |
1708 | if (buflen > 6) | |
1709 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1710 | ||
1711 | return 0; | |
1712 | } | |
1713 | ||
1714 | /** | |
b142eb65 | 1715 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1716 | * @args: device IDENTIFY data / SCSI command of interest. |
1717 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1718 | * @buflen: Response buffer length. | |
1719 | * | |
1720 | * Returns ATA device serial number. | |
1721 | * | |
1722 | * LOCKING: | |
cca3974e | 1723 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1724 | */ |
1725 | ||
1726 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1727 | unsigned int buflen) | |
1728 | { | |
1729 | const u8 hdr[] = { | |
1730 | 0, | |
1731 | 0x80, /* this page code */ | |
1732 | 0, | |
1733 | ATA_SERNO_LEN, /* page len */ | |
1734 | }; | |
1735 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1736 | ||
1737 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
6a62a04d TH |
1738 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
1739 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1da177e4 LT |
1740 | |
1741 | return 0; | |
1742 | } | |
1743 | ||
1da177e4 | 1744 | /** |
b142eb65 | 1745 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1746 | * @args: device IDENTIFY data / SCSI command of interest. |
1747 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1748 | * @buflen: Response buffer length. | |
1749 | * | |
b142eb65 JG |
1750 | * Yields two logical unit device identification designators: |
1751 | * - vendor specific ASCII containing the ATA serial number | |
1752 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1753 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1754 | * |
1755 | * LOCKING: | |
cca3974e | 1756 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1757 | */ |
1758 | ||
1759 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1760 | unsigned int buflen) | |
1761 | { | |
b142eb65 JG |
1762 | int num; |
1763 | const int sat_model_serial_desc_len = 68; | |
1764 | const int ata_model_byte_len = 40; | |
1da177e4 | 1765 | |
b142eb65 JG |
1766 | rbuf[1] = 0x83; /* this page code */ |
1767 | num = 4; | |
1768 | ||
1769 | if (buflen > (ATA_SERNO_LEN + num + 3)) { | |
1770 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ | |
2e9edbf8 | 1771 | rbuf[num + 0] = 2; |
b142eb65 JG |
1772 | rbuf[num + 3] = ATA_SERNO_LEN; |
1773 | num += 4; | |
1774 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1775 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1776 | num += ATA_SERNO_LEN; | |
1da177e4 | 1777 | } |
b142eb65 JG |
1778 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1779 | /* SAT defined lu model and serial numbers descriptor */ | |
1780 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1781 | rbuf[num + 0] = 2; |
1782 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1783 | rbuf[num + 3] = sat_model_serial_desc_len; |
1784 | num += 4; | |
1785 | memcpy(rbuf + num, "ATA ", 8); | |
1786 | num += 8; | |
1787 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1788 | ATA_ID_PROD_OFS, ata_model_byte_len); | |
1789 | num += ata_model_byte_len; | |
1790 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1791 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1792 | num += ATA_SERNO_LEN; | |
1793 | } | |
1794 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1795 | return 0; |
1796 | } | |
1797 | ||
1798 | /** | |
0cba632b | 1799 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1800 | * @args: device IDENTIFY data / SCSI command of interest. |
1801 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1802 | * @buflen: Response buffer length. | |
1803 | * | |
1804 | * No operation. Simply returns success to caller, to indicate | |
1805 | * that the caller should successfully complete this SCSI command. | |
1806 | * | |
1807 | * LOCKING: | |
cca3974e | 1808 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1809 | */ |
1810 | ||
1811 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1812 | unsigned int buflen) | |
1813 | { | |
1814 | VPRINTK("ENTER\n"); | |
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | /** | |
1819 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1820 | * @ptr_io: (input/output) Location to store more output data | |
1821 | * @last: End of output data buffer | |
1822 | * @buf: Pointer to BLOB being added to output buffer | |
1823 | * @buflen: Length of BLOB | |
1824 | * | |
1825 | * Store MODE SENSE data on an output buffer. | |
1826 | * | |
1827 | * LOCKING: | |
1828 | * None. | |
1829 | */ | |
1830 | ||
1831 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1832 | const u8 *buf, unsigned int buflen) | |
1833 | { | |
1834 | u8 *ptr = *ptr_io; | |
1835 | ||
1836 | if ((ptr + buflen - 1) > last) | |
1837 | return; | |
1838 | ||
1839 | memcpy(ptr, buf, buflen); | |
1840 | ||
1841 | ptr += buflen; | |
1842 | ||
1843 | *ptr_io = ptr; | |
1844 | } | |
1845 | ||
1846 | /** | |
1847 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1848 | * @id: device IDENTIFY data | |
1849 | * @ptr_io: (input/output) Location to store more output data | |
1850 | * @last: End of output data buffer | |
1851 | * | |
1852 | * Generate a caching info page, which conditionally indicates | |
1853 | * write caching to the SCSI layer, depending on device | |
1854 | * capabilities. | |
1855 | * | |
1856 | * LOCKING: | |
1857 | * None. | |
1858 | */ | |
1859 | ||
1860 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1861 | const u8 *last) | |
1862 | { | |
00ac37f5 | 1863 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1864 | |
00ac37f5 | 1865 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1866 | if (ata_id_wcache_enabled(id)) |
1867 | page[2] |= (1 << 2); /* write cache enable */ | |
1868 | if (!ata_id_rahead_enabled(id)) | |
1869 | page[12] |= (1 << 5); /* disable read ahead */ | |
1870 | ||
1871 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1872 | return sizeof(page); | |
1873 | } | |
1874 | ||
1875 | /** | |
1876 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1877 | * @dev: Device associated with this MODE SENSE command | |
1878 | * @ptr_io: (input/output) Location to store more output data | |
1879 | * @last: End of output data buffer | |
1880 | * | |
1881 | * Generate a generic MODE SENSE control mode page. | |
1882 | * | |
1883 | * LOCKING: | |
1884 | * None. | |
1885 | */ | |
1886 | ||
1887 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1888 | { | |
00ac37f5 DG |
1889 | ata_msense_push(ptr_io, last, def_control_mpage, |
1890 | sizeof(def_control_mpage)); | |
1891 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1892 | } |
1893 | ||
1894 | /** | |
1895 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1896 | * @dev: Device associated with this MODE SENSE command | |
1897 | * @ptr_io: (input/output) Location to store more output data | |
1898 | * @last: End of output data buffer | |
1899 | * | |
1900 | * Generate a generic MODE SENSE r/w error recovery page. | |
1901 | * | |
1902 | * LOCKING: | |
1903 | * None. | |
1904 | */ | |
1905 | ||
1906 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1907 | { | |
1da177e4 | 1908 | |
00ac37f5 DG |
1909 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
1910 | sizeof(def_rw_recovery_mpage)); | |
1911 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
1912 | } |
1913 | ||
48bdc8ec JA |
1914 | /* |
1915 | * We can turn this into a real blacklist if it's needed, for now just | |
1916 | * blacklist any Maxtor BANC1G10 revision firmware | |
1917 | */ | |
1918 | static int ata_dev_supports_fua(u16 *id) | |
1919 | { | |
1920 | unsigned char model[41], fw[9]; | |
1921 | ||
c3c013a2 JG |
1922 | if (!libata_fua) |
1923 | return 0; | |
48bdc8ec JA |
1924 | if (!ata_id_has_fua(id)) |
1925 | return 0; | |
1926 | ||
6a62a04d TH |
1927 | ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model)); |
1928 | ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw)); | |
48bdc8ec | 1929 | |
2e02671d | 1930 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 1931 | return 1; |
2e02671d | 1932 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
1933 | return 1; |
1934 | ||
1935 | return 0; /* blacklisted */ | |
1936 | } | |
1937 | ||
1da177e4 LT |
1938 | /** |
1939 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1940 | * @args: device IDENTIFY data / SCSI command of interest. | |
1941 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1942 | * @buflen: Response buffer length. | |
1943 | * | |
00ac37f5 DG |
1944 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
1945 | * access devices (e.g. disks) only. There should be no block | |
1946 | * descriptor for other device types. | |
1da177e4 LT |
1947 | * |
1948 | * LOCKING: | |
cca3974e | 1949 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1950 | */ |
1951 | ||
1952 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1953 | unsigned int buflen) | |
1954 | { | |
9a3dccc4 | 1955 | struct ata_device *dev = args->dev; |
1da177e4 | 1956 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
1957 | const u8 sat_blk_desc[] = { |
1958 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
1959 | 0, | |
1960 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
1961 | }; | |
1962 | u8 pg, spg; | |
1963 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 1964 | u8 dpofua; |
1da177e4 LT |
1965 | |
1966 | VPRINTK("ENTER\n"); | |
1967 | ||
1968 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
1969 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
1970 | /* | |
1971 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 1972 | */ |
00ac37f5 | 1973 | |
1da177e4 | 1974 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
1975 | switch (page_control) { |
1976 | case 0: /* current */ | |
1977 | break; /* supported */ | |
1978 | case 3: /* saved */ | |
1979 | goto saving_not_supp; | |
1980 | case 1: /* changeable */ | |
1981 | case 2: /* defaults */ | |
1982 | default: | |
1983 | goto invalid_fld; | |
1984 | } | |
1da177e4 | 1985 | |
00ac37f5 DG |
1986 | if (six_byte) { |
1987 | output_len = 4 + (ebd ? 8 : 0); | |
1988 | alloc_len = scsicmd[4]; | |
1989 | } else { | |
1990 | output_len = 8 + (ebd ? 8 : 0); | |
1991 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
1992 | } | |
1993 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
1994 | |
1995 | p = rbuf + output_len; | |
00ac37f5 | 1996 | last = rbuf + minlen - 1; |
1da177e4 | 1997 | |
00ac37f5 DG |
1998 | pg = scsicmd[2] & 0x3f; |
1999 | spg = scsicmd[3]; | |
2000 | /* | |
2001 | * No mode subpages supported (yet) but asking for _all_ | |
2002 | * subpages may be valid | |
2003 | */ | |
2004 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2005 | goto invalid_fld; | |
2006 | ||
2007 | switch(pg) { | |
2008 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
2009 | output_len += ata_msense_rw_recovery(&p, last); |
2010 | break; | |
2011 | ||
00ac37f5 | 2012 | case CACHE_MPAGE: |
1da177e4 LT |
2013 | output_len += ata_msense_caching(args->id, &p, last); |
2014 | break; | |
2015 | ||
00ac37f5 | 2016 | case CONTROL_MPAGE: { |
1da177e4 LT |
2017 | output_len += ata_msense_ctl_mode(&p, last); |
2018 | break; | |
2019 | } | |
2020 | ||
00ac37f5 | 2021 | case ALL_MPAGES: |
1da177e4 LT |
2022 | output_len += ata_msense_rw_recovery(&p, last); |
2023 | output_len += ata_msense_caching(args->id, &p, last); | |
2024 | output_len += ata_msense_ctl_mode(&p, last); | |
2025 | break; | |
2026 | ||
2027 | default: /* invalid page code */ | |
ae006510 | 2028 | goto invalid_fld; |
1da177e4 LT |
2029 | } |
2030 | ||
00ac37f5 DG |
2031 | if (minlen < 1) |
2032 | return 0; | |
9a3dccc4 TH |
2033 | |
2034 | dpofua = 0; | |
f79d409f | 2035 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2036 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2037 | dpofua = 1 << 4; | |
2038 | ||
1da177e4 LT |
2039 | if (six_byte) { |
2040 | output_len--; | |
2041 | rbuf[0] = output_len; | |
9a3dccc4 TH |
2042 | if (minlen > 2) |
2043 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
2044 | if (ebd) { |
2045 | if (minlen > 3) | |
2046 | rbuf[3] = sizeof(sat_blk_desc); | |
2047 | if (minlen > 11) | |
2048 | memcpy(rbuf + 4, sat_blk_desc, | |
2049 | sizeof(sat_blk_desc)); | |
2050 | } | |
1da177e4 LT |
2051 | } else { |
2052 | output_len -= 2; | |
2053 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
2054 | if (minlen > 1) |
2055 | rbuf[1] = output_len; | |
9a3dccc4 TH |
2056 | if (minlen > 3) |
2057 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
2058 | if (ebd) { |
2059 | if (minlen > 7) | |
2060 | rbuf[7] = sizeof(sat_blk_desc); | |
2061 | if (minlen > 15) | |
2062 | memcpy(rbuf + 8, sat_blk_desc, | |
2063 | sizeof(sat_blk_desc)); | |
2064 | } | |
1da177e4 | 2065 | } |
1da177e4 | 2066 | return 0; |
ae006510 DG |
2067 | |
2068 | invalid_fld: | |
2069 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2070 | /* "Invalid field in cbd" */ | |
2071 | return 1; | |
2072 | ||
2073 | saving_not_supp: | |
2074 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2075 | /* "Saving parameters not supported" */ | |
2076 | return 1; | |
1da177e4 LT |
2077 | } |
2078 | ||
2079 | /** | |
2080 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2081 | * @args: device IDENTIFY data / SCSI command of interest. | |
2082 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2083 | * @buflen: Response buffer length. | |
2084 | * | |
2085 | * Simulate READ CAPACITY commands. | |
2086 | * | |
2087 | * LOCKING: | |
6a36261e | 2088 | * None. |
1da177e4 | 2089 | */ |
1da177e4 LT |
2090 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
2091 | unsigned int buflen) | |
2092 | { | |
6a36261e | 2093 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2094 | |
2095 | VPRINTK("ENTER\n"); | |
2096 | ||
1da177e4 | 2097 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2098 | if (last_lba >= 0xffffffffULL) |
2099 | last_lba = 0xffffffff; | |
0c144d0d | 2100 | |
1da177e4 | 2101 | /* sector count, 32-bit */ |
6a36261e TH |
2102 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); |
2103 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2104 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2105 | ATA_SCSI_RBUF_SET(3, last_lba); | |
1da177e4 LT |
2106 | |
2107 | /* sector size */ | |
6a36261e TH |
2108 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); |
2109 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE); | |
1da177e4 LT |
2110 | } else { |
2111 | /* sector count, 64-bit */ | |
6a36261e TH |
2112 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); |
2113 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2114 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2115 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2116 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2117 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2118 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2119 | ATA_SCSI_RBUF_SET(7, last_lba); | |
1da177e4 LT |
2120 | |
2121 | /* sector size */ | |
6a36261e TH |
2122 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); |
2123 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE); | |
1da177e4 LT |
2124 | } |
2125 | ||
2126 | return 0; | |
2127 | } | |
2128 | ||
2129 | /** | |
2130 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2131 | * @args: device IDENTIFY data / SCSI command of interest. | |
2132 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2133 | * @buflen: Response buffer length. | |
2134 | * | |
2135 | * Simulate REPORT LUNS command. | |
2136 | * | |
2137 | * LOCKING: | |
cca3974e | 2138 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2139 | */ |
2140 | ||
2141 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2142 | unsigned int buflen) | |
2143 | { | |
2144 | VPRINTK("ENTER\n"); | |
2145 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2146 | ||
2147 | return 0; | |
2148 | } | |
2149 | ||
845c5834 DG |
2150 | /** |
2151 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2152 | * @cmd: SCSI request to be handled | |
2153 | * @sk: SCSI-defined sense key | |
2154 | * @asc: SCSI-defined additional sense code | |
2155 | * @ascq: SCSI-defined additional sense code qualifier | |
2156 | * | |
2157 | * Helper function that builds a valid fixed format, current | |
2158 | * response code and the given sense key (sk), additional sense | |
2159 | * code (asc) and additional sense code qualifier (ascq) with | |
2160 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2161 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2162 | * | |
2163 | * LOCKING: | |
2164 | * Not required | |
2165 | */ | |
2166 | ||
2167 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2168 | { | |
2169 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2170 | ||
2171 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2172 | cmd->sense_buffer[2] = sk; | |
2173 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2174 | cmd->sense_buffer[12] = asc; | |
2175 | cmd->sense_buffer[13] = ascq; | |
2176 | } | |
2177 | ||
1da177e4 LT |
2178 | /** |
2179 | * ata_scsi_badcmd - End a SCSI request with an error | |
2180 | * @cmd: SCSI request to be handled | |
2181 | * @done: SCSI command completion function | |
2182 | * @asc: SCSI-defined additional sense code | |
2183 | * @ascq: SCSI-defined additional sense code qualifier | |
2184 | * | |
2185 | * Helper function that completes a SCSI command with | |
2186 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2187 | * and the specified additional sense codes. | |
2188 | * | |
2189 | * LOCKING: | |
cca3974e | 2190 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2191 | */ |
2192 | ||
2193 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2194 | { | |
2195 | DPRINTK("ENTER\n"); | |
ae006510 | 2196 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2197 | |
2198 | done(cmd); | |
2199 | } | |
2200 | ||
77853bf2 | 2201 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2202 | { |
74e6c8c3 | 2203 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2204 | /* FIXME: not quite right; we don't want the |
2205 | * translation of taskfile registers into | |
2206 | * a sense descriptors, since that's only | |
2207 | * correct for ATA, not ATAPI | |
2208 | */ | |
750426aa | 2209 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2210 | } |
a939c963 | 2211 | |
c6e6e666 | 2212 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2213 | ata_qc_free(qc); |
c6e6e666 | 2214 | } |
a939c963 | 2215 | |
c6e6e666 JG |
2216 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2217 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2218 | { | |
2219 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2220 | } | |
2221 | ||
2222 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2223 | { | |
2224 | struct ata_port *ap = qc->ap; | |
2225 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2226 | ||
2227 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2228 | |
2229 | /* FIXME: is this needed? */ | |
2230 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2231 | ||
c6e6e666 JG |
2232 | ap->ops->tf_read(ap, &qc->tf); |
2233 | ||
2234 | /* fill these in, for the case where they are -not- overwritten */ | |
2235 | cmd->sense_buffer[0] = 0x70; | |
2236 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2237 | ||
2238 | ata_qc_reinit(qc); | |
2239 | ||
a939c963 JG |
2240 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
2241 | qc->dma_dir = DMA_FROM_DEVICE; | |
2242 | ||
6e7846e9 | 2243 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2244 | qc->cdb[0] = REQUEST_SENSE; |
2245 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2246 | ||
2247 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2248 | qc->tf.command = ATA_CMD_PACKET; | |
2249 | ||
c6e6e666 JG |
2250 | if (ata_pio_use_silly(ap)) { |
2251 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2252 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2253 | } else { | |
2254 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2255 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2256 | qc->tf.lbah = (8 * 1024) >> 8; | |
2257 | } | |
a939c963 JG |
2258 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2259 | ||
c6e6e666 | 2260 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2261 | |
8e0e694a | 2262 | ata_qc_issue(qc); |
a939c963 JG |
2263 | |
2264 | DPRINTK("EXIT\n"); | |
2265 | } | |
2266 | ||
77853bf2 | 2267 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2268 | { |
2269 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2270 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2271 | |
a7dac447 | 2272 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2273 | |
246619da TH |
2274 | /* handle completion from new EH */ |
2275 | if (unlikely(qc->ap->ops->error_handler && | |
2276 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2277 | ||
2278 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2279 | /* FIXME: not quite right; we don't want the | |
2280 | * translation of taskfile registers into a | |
2281 | * sense descriptors, since that's only | |
2282 | * correct for ATA, not ATAPI | |
2283 | */ | |
750426aa | 2284 | ata_gen_passthru_sense(qc); |
246619da TH |
2285 | } |
2286 | ||
22aac089 TH |
2287 | /* SCSI EH automatically locks door if sdev->locked is |
2288 | * set. Sometimes door lock request continues to | |
2289 | * fail, for example, when no media is present. This | |
2290 | * creates a loop - SCSI EH issues door lock which | |
2291 | * fails and gets invoked again to acquire sense data | |
2292 | * for the failed command. | |
2293 | * | |
2294 | * If door lock fails, always clear sdev->locked to | |
2295 | * avoid this infinite loop. | |
2296 | */ | |
2297 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2298 | qc->dev->sdev->locked = 0; | |
2299 | ||
246619da TH |
2300 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2301 | qc->scsidone(cmd); | |
2302 | ata_qc_free(qc); | |
2303 | return; | |
2304 | } | |
2305 | ||
2306 | /* successful completion or old EH failure path */ | |
a7dac447 | 2307 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2308 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2309 | atapi_request_sense(qc); |
77853bf2 | 2310 | return; |
74e6c8c3 | 2311 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2312 | /* FIXME: not quite right; we don't want the |
2313 | * translation of taskfile registers into | |
2314 | * a sense descriptors, since that's only | |
2315 | * correct for ATA, not ATAPI | |
2316 | */ | |
750426aa | 2317 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2318 | } else { |
1da177e4 LT |
2319 | u8 *scsicmd = cmd->cmnd; |
2320 | ||
fd71da46 | 2321 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2322 | u8 *buf = NULL; |
2323 | unsigned int buflen; | |
2324 | ||
2325 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2326 | |
2327 | /* ATAPI devices typically report zero for their SCSI version, | |
2328 | * and sometimes deviate from the spec WRT response data | |
2329 | * format. If SCSI version is reported as zero like normal, | |
2330 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2331 | * to indicate to the Linux scsi midlayer this is a modern | |
2332 | * device. 2) Ensure response data format / ATAPI information | |
2333 | * are always correct. | |
a15dbeb4 JG |
2334 | */ |
2335 | if (buf[2] == 0) { | |
2336 | buf[2] = 0x5; | |
2337 | buf[3] = 0x32; | |
2338 | } | |
2339 | ||
1da177e4 LT |
2340 | ata_scsi_rbuf_put(cmd, buf); |
2341 | } | |
a15dbeb4 | 2342 | |
1da177e4 LT |
2343 | cmd->result = SAM_STAT_GOOD; |
2344 | } | |
2345 | ||
2346 | qc->scsidone(cmd); | |
77853bf2 | 2347 | ata_qc_free(qc); |
1da177e4 LT |
2348 | } |
2349 | /** | |
2350 | * atapi_xlat - Initialize PACKET taskfile | |
2351 | * @qc: command structure to be initialized | |
1da177e4 LT |
2352 | * |
2353 | * LOCKING: | |
cca3974e | 2354 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2355 | * |
2356 | * RETURNS: | |
2357 | * Zero on success, non-zero on failure. | |
2358 | */ | |
ad706991 | 2359 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2360 | { |
542b1444 | 2361 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 LT |
2362 | struct ata_device *dev = qc->dev; |
2363 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
542b1444 | 2364 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
2365 | |
2366 | if (!using_pio) | |
2367 | /* Check whether ATAPI DMA is safe */ | |
2368 | if (ata_check_atapi_dma(qc)) | |
2369 | using_pio = 1; | |
2370 | ||
2e5704f6 TH |
2371 | memset(qc->cdb, 0, dev->cdb_len); |
2372 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2373 | |
2374 | qc->complete_fn = atapi_qc_complete; | |
2375 | ||
2376 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2377 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2378 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2379 | DPRINTK("direction: write\n"); | |
2380 | } | |
2381 | ||
2382 | qc->tf.command = ATA_CMD_PACKET; | |
2383 | ||
2384 | /* no data, or PIO data xfer */ | |
2385 | if (using_pio || nodata) { | |
2386 | if (nodata) | |
2387 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2388 | else | |
2389 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2390 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2391 | qc->tf.lbah = (8 * 1024) >> 8; | |
2392 | } | |
2393 | ||
2394 | /* DMA data xfer */ | |
2395 | else { | |
2396 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2397 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2398 | ||
542b1444 | 2399 | if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE)) |
95de719a | 2400 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2401 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2402 | } |
2403 | ||
542b1444 | 2404 | qc->nbytes = scmd->request_bufflen; |
1da177e4 LT |
2405 | |
2406 | return 0; | |
2407 | } | |
2408 | ||
ab5b3a5b TH |
2409 | static struct ata_device * ata_find_dev(struct ata_port *ap, int id) |
2410 | { | |
2411 | if (likely(id < ATA_MAX_DEVICES)) | |
2412 | return &ap->device[id]; | |
2413 | return NULL; | |
2414 | } | |
2415 | ||
2416 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
2417 | const struct scsi_device *scsidev) | |
2418 | { | |
2419 | /* skip commands not addressed to targets we simulate */ | |
2420 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2421 | return NULL; | |
2422 | ||
2423 | return ata_find_dev(ap, scsidev->id); | |
2424 | } | |
2425 | ||
99ba9e09 BK |
2426 | /** |
2427 | * ata_scsi_dev_enabled - determine if device is enabled | |
2428 | * @dev: ATA device | |
2429 | * | |
2430 | * Determine if commands should be sent to the specified device. | |
2431 | * | |
2432 | * LOCKING: | |
cca3974e | 2433 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2434 | * |
2435 | * RETURNS: | |
2436 | * 0 if commands are not allowed / 1 if commands are allowed | |
2437 | */ | |
2438 | ||
2439 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2440 | { | |
2441 | if (unlikely(!ata_dev_enabled(dev))) | |
2442 | return 0; | |
2443 | ||
2444 | if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { | |
2445 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { | |
2446 | ata_dev_printk(dev, KERN_WARNING, | |
2447 | "WARNING: ATAPI is %s, device ignored.\n", | |
2448 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2449 | return 0; | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | return 1; | |
2454 | } | |
2455 | ||
1da177e4 LT |
2456 | /** |
2457 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2458 | * @ap: ATA port to which the device is attached | |
2459 | * @scsidev: SCSI device from which we derive the ATA device | |
2460 | * | |
2461 | * Given various information provided in struct scsi_cmnd, | |
2462 | * map that onto an ATA bus, and using that mapping | |
2463 | * determine which ata_device is associated with the | |
2464 | * SCSI command to be sent. | |
2465 | * | |
2466 | * LOCKING: | |
cca3974e | 2467 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2468 | * |
2469 | * RETURNS: | |
2470 | * Associated ATA device, or %NULL if not found. | |
2471 | */ | |
1da177e4 | 2472 | static struct ata_device * |
057ace5e | 2473 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2474 | { |
ab5b3a5b | 2475 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2476 | |
99ba9e09 | 2477 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2478 | return NULL; |
2479 | ||
1da177e4 LT |
2480 | return dev; |
2481 | } | |
2482 | ||
b095518e JG |
2483 | /* |
2484 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2485 | * @byte1: Byte 1 from pass-thru CDB. | |
2486 | * | |
2487 | * RETURNS: | |
2488 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2489 | */ | |
2490 | static u8 | |
2491 | ata_scsi_map_proto(u8 byte1) | |
2492 | { | |
2493 | switch((byte1 & 0x1e) >> 1) { | |
2494 | case 3: /* Non-data */ | |
2495 | return ATA_PROT_NODATA; | |
2496 | ||
2497 | case 6: /* DMA */ | |
2498 | return ATA_PROT_DMA; | |
2499 | ||
2500 | case 4: /* PIO Data-in */ | |
2501 | case 5: /* PIO Data-out */ | |
b095518e JG |
2502 | return ATA_PROT_PIO; |
2503 | ||
2504 | case 10: /* Device Reset */ | |
2505 | case 0: /* Hard Reset */ | |
2506 | case 1: /* SRST */ | |
2507 | case 2: /* Bus Idle */ | |
2508 | case 7: /* Packet */ | |
2509 | case 8: /* DMA Queued */ | |
2510 | case 9: /* Device Diagnostic */ | |
2511 | case 11: /* UDMA Data-in */ | |
2512 | case 12: /* UDMA Data-Out */ | |
2513 | case 13: /* FPDMA */ | |
2514 | default: /* Reserved */ | |
2515 | break; | |
2516 | } | |
2517 | ||
2518 | return ATA_PROT_UNKNOWN; | |
2519 | } | |
2520 | ||
2521 | /** | |
2522 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2523 | * @qc: command structure to be initialized | |
b095518e JG |
2524 | * |
2525 | * Handles either 12 or 16-byte versions of the CDB. | |
2526 | * | |
2527 | * RETURNS: | |
2528 | * Zero on success, non-zero on failure. | |
2529 | */ | |
ad706991 | 2530 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2531 | { |
2532 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2533 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2534 | struct ata_device *dev = qc->dev; |
ad706991 | 2535 | const u8 *cdb = scmd->cmnd; |
b095518e | 2536 | |
542b1444 | 2537 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2538 | goto invalid_fld; |
8190bdb9 | 2539 | |
f79d409f AC |
2540 | /* We may not issue DMA commands if no DMA mode is set */ |
2541 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2542 | goto invalid_fld; | |
b095518e | 2543 | |
542b1444 | 2544 | if (cdb[1] & 0xe0) |
f59b0cf8 AL |
2545 | /* PIO multi not supported yet */ |
2546 | goto invalid_fld; | |
2547 | ||
b095518e JG |
2548 | /* |
2549 | * 12 and 16 byte CDBs use different offsets to | |
2550 | * provide the various register values. | |
2551 | */ | |
542b1444 | 2552 | if (cdb[0] == ATA_16) { |
b095518e JG |
2553 | /* |
2554 | * 16-byte CDB - may contain extended commands. | |
2555 | * | |
2556 | * If that is the case, copy the upper byte register values. | |
2557 | */ | |
542b1444 TH |
2558 | if (cdb[1] & 0x01) { |
2559 | tf->hob_feature = cdb[3]; | |
2560 | tf->hob_nsect = cdb[5]; | |
2561 | tf->hob_lbal = cdb[7]; | |
2562 | tf->hob_lbam = cdb[9]; | |
2563 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2564 | tf->flags |= ATA_TFLAG_LBA48; |
2565 | } else | |
2566 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2567 | ||
2568 | /* | |
2569 | * Always copy low byte, device and command registers. | |
2570 | */ | |
542b1444 TH |
2571 | tf->feature = cdb[4]; |
2572 | tf->nsect = cdb[6]; | |
2573 | tf->lbal = cdb[8]; | |
2574 | tf->lbam = cdb[10]; | |
2575 | tf->lbah = cdb[12]; | |
2576 | tf->device = cdb[13]; | |
2577 | tf->command = cdb[14]; | |
b095518e JG |
2578 | } else { |
2579 | /* | |
2580 | * 12-byte CDB - incapable of extended commands. | |
2581 | */ | |
2582 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2583 | ||
542b1444 TH |
2584 | tf->feature = cdb[3]; |
2585 | tf->nsect = cdb[4]; | |
2586 | tf->lbal = cdb[5]; | |
2587 | tf->lbam = cdb[6]; | |
2588 | tf->lbah = cdb[7]; | |
2589 | tf->device = cdb[8]; | |
2590 | tf->command = cdb[9]; | |
b095518e | 2591 | } |
dcc2d1e7 ML |
2592 | /* |
2593 | * If slave is possible, enforce correct master/slave bit | |
2594 | */ | |
2595 | if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) | |
2596 | tf->device = qc->dev->devno ? | |
2597 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e JG |
2598 | |
2599 | /* | |
2600 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2601 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2602 | * by an update to hardware-specific registers for each | |
2603 | * controller (i.e. the reason for ->set_piomode(), | |
2604 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2605 | */ | |
2606 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2607 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2608 | goto invalid_fld; |
b095518e JG |
2609 | |
2610 | /* | |
2611 | * Set flags so that all registers will be written, | |
2612 | * and pass on write indication (used for PIO/DMA | |
2613 | * setup.) | |
2614 | */ | |
2615 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2616 | ||
542b1444 | 2617 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2618 | tf->flags |= ATA_TFLAG_WRITE; |
2619 | ||
2620 | /* | |
2621 | * Set transfer length. | |
2622 | * | |
2623 | * TODO: find out if we need to do more here to | |
2624 | * cover scatter/gather case. | |
2625 | */ | |
542b1444 | 2626 | qc->nsect = scmd->request_bufflen / ATA_SECT_SIZE; |
b095518e | 2627 | |
e61e0672 TH |
2628 | /* request result TF */ |
2629 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2630 | ||
b095518e | 2631 | return 0; |
9a405257 TH |
2632 | |
2633 | invalid_fld: | |
542b1444 | 2634 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2635 | /* "Invalid field in cdb" */ |
2636 | return 1; | |
b095518e JG |
2637 | } |
2638 | ||
1da177e4 LT |
2639 | /** |
2640 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2641 | * @dev: ATA device | |
2642 | * @cmd: SCSI command opcode to consider | |
2643 | * | |
2644 | * Look up the SCSI command given, and determine whether the | |
2645 | * SCSI command is to be translated or simulated. | |
2646 | * | |
2647 | * RETURNS: | |
2648 | * Pointer to translation function if possible, %NULL if not. | |
2649 | */ | |
2650 | ||
2651 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2652 | { | |
2653 | switch (cmd) { | |
2654 | case READ_6: | |
2655 | case READ_10: | |
2656 | case READ_16: | |
2657 | ||
2658 | case WRITE_6: | |
2659 | case WRITE_10: | |
2660 | case WRITE_16: | |
2661 | return ata_scsi_rw_xlat; | |
2662 | ||
2663 | case SYNCHRONIZE_CACHE: | |
2664 | if (ata_try_flush_cache(dev)) | |
2665 | return ata_scsi_flush_xlat; | |
2666 | break; | |
2667 | ||
2668 | case VERIFY: | |
2669 | case VERIFY_16: | |
2670 | return ata_scsi_verify_xlat; | |
b095518e JG |
2671 | |
2672 | case ATA_12: | |
2673 | case ATA_16: | |
2674 | return ata_scsi_pass_thru; | |
da61396d | 2675 | |
972dcafb DG |
2676 | case START_STOP: |
2677 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2678 | } |
2679 | ||
2680 | return NULL; | |
2681 | } | |
2682 | ||
2683 | /** | |
2684 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2685 | * @ap: ATA port to which the command was being sent | |
2686 | * @cmd: SCSI command to dump | |
2687 | * | |
2688 | * Prints the contents of a SCSI command via printk(). | |
2689 | */ | |
2690 | ||
2691 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2692 | struct scsi_cmnd *cmd) | |
2693 | { | |
2694 | #ifdef ATA_DEBUG | |
2695 | struct scsi_device *scsidev = cmd->device; | |
2696 | u8 *scsicmd = cmd->cmnd; | |
2697 | ||
2698 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2699 | ap->id, | |
2700 | scsidev->channel, scsidev->id, scsidev->lun, | |
2701 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2702 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2703 | scsicmd[8]); | |
2704 | #endif | |
2705 | } | |
2706 | ||
542b1444 | 2707 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2708 | void (*done)(struct scsi_cmnd *), |
2709 | struct ata_device *dev) | |
eb3f0f9c | 2710 | { |
2115ea94 TH |
2711 | int rc = 0; |
2712 | ||
2e5704f6 TH |
2713 | if (unlikely(!scmd->cmd_len)) { |
2714 | ata_dev_printk(dev, KERN_WARNING, "WARNING: zero len CDB\n"); | |
2715 | scmd->result = DID_ERROR << 16; | |
2716 | done(scmd); | |
2717 | return 0; | |
2718 | } | |
2719 | ||
eb3f0f9c BK |
2720 | if (dev->class == ATA_DEV_ATA) { |
2721 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
542b1444 | 2722 | scmd->cmnd[0]); |
eb3f0f9c BK |
2723 | |
2724 | if (xlat_func) | |
542b1444 | 2725 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); |
eb3f0f9c | 2726 | else |
542b1444 | 2727 | ata_scsi_simulate(dev, scmd, done); |
eb3f0f9c | 2728 | } else |
542b1444 | 2729 | rc = ata_scsi_translate(dev, scmd, done, atapi_xlat); |
2115ea94 TH |
2730 | |
2731 | return rc; | |
eb3f0f9c BK |
2732 | } |
2733 | ||
1da177e4 LT |
2734 | /** |
2735 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2736 | * @cmd: SCSI command to be sent | |
2737 | * @done: Completion function, called when command is complete | |
2738 | * | |
2739 | * In some cases, this function translates SCSI commands into | |
2740 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2741 | * hardware. In other cases, this function simulates a | |
2742 | * SCSI device by evaluating and responding to certain | |
2743 | * SCSI commands. This creates the overall effect of | |
2744 | * ATA and ATAPI devices appearing as SCSI devices. | |
2745 | * | |
2746 | * LOCKING: | |
cca3974e | 2747 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
2748 | * |
2749 | * RETURNS: | |
2115ea94 TH |
2750 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
2751 | * 0 otherwise. | |
1da177e4 | 2752 | */ |
1da177e4 LT |
2753 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
2754 | { | |
2755 | struct ata_port *ap; | |
2756 | struct ata_device *dev; | |
2757 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 2758 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 2759 | int rc = 0; |
1da177e4 | 2760 | |
35bb94b1 | 2761 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
2762 | |
2763 | spin_unlock(shost->host_lock); | |
ba6a1308 | 2764 | spin_lock(ap->lock); |
1da177e4 LT |
2765 | |
2766 | ata_scsi_dump_cdb(ap, cmd); | |
2767 | ||
2768 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 2769 | if (likely(dev)) |
2115ea94 | 2770 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 2771 | else { |
1da177e4 LT |
2772 | cmd->result = (DID_BAD_TARGET << 16); |
2773 | done(cmd); | |
1da177e4 LT |
2774 | } |
2775 | ||
ba6a1308 | 2776 | spin_unlock(ap->lock); |
005a5a06 | 2777 | spin_lock(shost->host_lock); |
2115ea94 | 2778 | return rc; |
1da177e4 LT |
2779 | } |
2780 | ||
2781 | /** | |
2782 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 2783 | * @dev: the target device |
1da177e4 LT |
2784 | * @cmd: SCSI command being sent to device. |
2785 | * @done: SCSI command completion function. | |
2786 | * | |
2787 | * Interprets and directly executes a select list of SCSI commands | |
2788 | * that can be handled internally. | |
2789 | * | |
2790 | * LOCKING: | |
cca3974e | 2791 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2792 | */ |
2793 | ||
3373efd8 | 2794 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
2795 | void (*done)(struct scsi_cmnd *)) |
2796 | { | |
2797 | struct ata_scsi_args args; | |
057ace5e | 2798 | const u8 *scsicmd = cmd->cmnd; |
1da177e4 | 2799 | |
9a3dccc4 TH |
2800 | args.dev = dev; |
2801 | args.id = dev->id; | |
1da177e4 LT |
2802 | args.cmd = cmd; |
2803 | args.done = done; | |
2804 | ||
2805 | switch(scsicmd[0]) { | |
2806 | /* no-op's, complete with success */ | |
2807 | case SYNCHRONIZE_CACHE: | |
2808 | case REZERO_UNIT: | |
2809 | case SEEK_6: | |
2810 | case SEEK_10: | |
2811 | case TEST_UNIT_READY: | |
2812 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2813 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2814 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2815 | break; | |
2816 | ||
2817 | case INQUIRY: | |
2818 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 2819 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2820 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2821 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2822 | else if (scsicmd[2] == 0x00) | |
2823 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2824 | else if (scsicmd[2] == 0x80) | |
2825 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2826 | else if (scsicmd[2] == 0x83) | |
2827 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2828 | else | |
ae006510 | 2829 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2830 | break; |
2831 | ||
2832 | case MODE_SENSE: | |
2833 | case MODE_SENSE_10: | |
2834 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2835 | break; | |
2836 | ||
2837 | case MODE_SELECT: /* unconditionally return */ | |
2838 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 2839 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2840 | break; |
2841 | ||
2842 | case READ_CAPACITY: | |
2843 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2844 | break; | |
2845 | ||
2846 | case SERVICE_ACTION_IN: | |
2847 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2848 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2849 | else | |
ae006510 | 2850 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2851 | break; |
2852 | ||
2853 | case REPORT_LUNS: | |
2854 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2855 | break; | |
2856 | ||
b095518e | 2857 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2858 | case REQUEST_SENSE: |
2859 | ||
2860 | /* all other commands */ | |
2861 | default: | |
ae006510 DG |
2862 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
2863 | /* "Invalid command operation code" */ | |
2864 | done(cmd); | |
1da177e4 LT |
2865 | break; |
2866 | } | |
2867 | } | |
2868 | ||
644dd0cc JG |
2869 | void ata_scsi_scan_host(struct ata_port *ap) |
2870 | { | |
2871 | unsigned int i; | |
2872 | ||
198e0fed | 2873 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
2874 | return; |
2875 | ||
3f19ee8c | 2876 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
3edebac4 TH |
2877 | struct ata_device *dev = &ap->device[i]; |
2878 | struct scsi_device *sdev; | |
2879 | ||
2880 | if (!ata_dev_enabled(dev) || dev->sdev) | |
2881 | continue; | |
3f19ee8c | 2882 | |
cca3974e | 2883 | sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL); |
3edebac4 TH |
2884 | if (!IS_ERR(sdev)) { |
2885 | dev->sdev = sdev; | |
2886 | scsi_device_put(sdev); | |
2887 | } | |
3f19ee8c | 2888 | } |
644dd0cc | 2889 | } |
0ea035a3 TH |
2890 | |
2891 | /** | |
2892 | * ata_scsi_offline_dev - offline attached SCSI device | |
2893 | * @dev: ATA device to offline attached SCSI device for | |
2894 | * | |
2895 | * This function is called from ata_eh_hotplug() and responsible | |
2896 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 2897 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
2898 | * against clearing. |
2899 | * | |
2900 | * LOCKING: | |
cca3974e | 2901 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
2902 | * |
2903 | * RETURNS: | |
2904 | * 1 if attached SCSI device exists, 0 otherwise. | |
2905 | */ | |
2906 | int ata_scsi_offline_dev(struct ata_device *dev) | |
2907 | { | |
2908 | if (dev->sdev) { | |
2909 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
2910 | return 1; | |
2911 | } | |
2912 | return 0; | |
2913 | } | |
580b2102 TH |
2914 | |
2915 | /** | |
2916 | * ata_scsi_remove_dev - remove attached SCSI device | |
2917 | * @dev: ATA device to remove attached SCSI device for | |
2918 | * | |
2919 | * This function is called from ata_eh_scsi_hotplug() and | |
2920 | * responsible for removing the SCSI device attached to @dev. | |
2921 | * | |
2922 | * LOCKING: | |
2923 | * Kernel thread context (may sleep). | |
2924 | */ | |
2925 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
2926 | { | |
2927 | struct ata_port *ap = dev->ap; | |
2928 | struct scsi_device *sdev; | |
2929 | unsigned long flags; | |
2930 | ||
2931 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
2932 | * state doesn't change underneath us and thus | |
2933 | * scsi_device_get() always succeeds. The mutex locking can | |
2934 | * be removed if there is __scsi_device_get() interface which | |
2935 | * increments reference counts regardless of device state. | |
2936 | */ | |
cca3974e | 2937 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 2938 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 2939 | |
cca3974e | 2940 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
2941 | sdev = dev->sdev; |
2942 | dev->sdev = NULL; | |
2943 | ||
2944 | if (sdev) { | |
2945 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 2946 | * away underneath us after the host lock and |
580b2102 TH |
2947 | * scan_mutex are released. Hold onto it. |
2948 | */ | |
2949 | if (scsi_device_get(sdev) == 0) { | |
2950 | /* The following ensures the attached sdev is | |
2951 | * offline on return from ata_scsi_offline_dev() | |
2952 | * regardless it wins or loses the race | |
2953 | * against this function. | |
2954 | */ | |
2955 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
2956 | } else { | |
2957 | WARN_ON(1); | |
2958 | sdev = NULL; | |
2959 | } | |
2960 | } | |
2961 | ||
ba6a1308 | 2962 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 2963 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
2964 | |
2965 | if (sdev) { | |
2966 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
2967 | sdev->sdev_gendev.bus_id); | |
2968 | ||
2969 | scsi_remove_device(sdev); | |
2970 | scsi_device_put(sdev); | |
2971 | } | |
2972 | } | |
2973 | ||
2974 | /** | |
2975 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 2976 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
2977 | * |
2978 | * Perform SCSI part of hotplug. It's executed from a separate | |
2979 | * workqueue after EH completes. This is necessary because SCSI | |
2980 | * hot plugging requires working EH and hot unplugging is | |
2981 | * synchronized with hot plugging with a mutex. | |
2982 | * | |
2983 | * LOCKING: | |
2984 | * Kernel thread context (may sleep). | |
2985 | */ | |
65f27f38 | 2986 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 2987 | { |
65f27f38 DH |
2988 | struct ata_port *ap = |
2989 | container_of(work, struct ata_port, hotplug_task.work); | |
580b2102 TH |
2990 | int i; |
2991 | ||
b51e9e5d | 2992 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
2993 | DPRINTK("ENTER/EXIT - unloading\n"); |
2994 | return; | |
2995 | } | |
2996 | ||
2997 | DPRINTK("ENTER\n"); | |
2998 | ||
2999 | /* unplug detached devices */ | |
3000 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3001 | struct ata_device *dev = &ap->device[i]; | |
3002 | unsigned long flags; | |
3003 | ||
3004 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3005 | continue; | |
3006 | ||
ba6a1308 | 3007 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3008 | dev->flags &= ~ATA_DFLAG_DETACHED; |
ba6a1308 | 3009 | spin_unlock_irqrestore(ap->lock, flags); |
580b2102 TH |
3010 | |
3011 | ata_scsi_remove_dev(dev); | |
3012 | } | |
3013 | ||
3014 | /* scan for new ones */ | |
3015 | ata_scsi_scan_host(ap); | |
3016 | ||
3017 | /* If we scanned while EH was in progress, scan would have | |
3018 | * failed silently. Requeue if there are enabled but | |
3019 | * unattached devices. | |
3020 | */ | |
3021 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3022 | struct ata_device *dev = &ap->device[i]; | |
3023 | if (ata_dev_enabled(dev) && !dev->sdev) { | |
3024 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ); | |
3025 | break; | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | DPRINTK("EXIT\n"); | |
3030 | } | |
83c47bcb TH |
3031 | |
3032 | /** | |
3033 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3034 | * @shost: SCSI host to scan | |
3035 | * @channel: Channel to scan | |
3036 | * @id: ID to scan | |
3037 | * @lun: LUN to scan | |
3038 | * | |
3039 | * This function is called when user explicitly requests bus | |
3040 | * scan. Set probe pending flag and invoke EH. | |
3041 | * | |
3042 | * LOCKING: | |
3043 | * SCSI layer (we don't care) | |
3044 | * | |
3045 | * RETURNS: | |
3046 | * Zero. | |
3047 | */ | |
3048 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3049 | unsigned int id, unsigned int lun) | |
3050 | { | |
3051 | struct ata_port *ap = ata_shost_to_port(shost); | |
3052 | unsigned long flags; | |
3053 | int rc = 0; | |
3054 | ||
3055 | if (!ap->ops->error_handler) | |
3056 | return -EOPNOTSUPP; | |
3057 | ||
3058 | if ((channel != SCAN_WILD_CARD && channel != 0) || | |
3059 | (lun != SCAN_WILD_CARD && lun != 0)) | |
3060 | return -EINVAL; | |
3061 | ||
ba6a1308 | 3062 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
3063 | |
3064 | if (id == SCAN_WILD_CARD) { | |
3065 | ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; | |
3066 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3067 | } else { | |
3068 | struct ata_device *dev = ata_find_dev(ap, id); | |
3069 | ||
3070 | if (dev) { | |
3071 | ap->eh_info.probe_mask |= 1 << dev->devno; | |
3072 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
28324304 | 3073 | ap->eh_info.flags |= ATA_EHI_RESUME_LINK; |
83c47bcb TH |
3074 | } else |
3075 | rc = -EINVAL; | |
3076 | } | |
3077 | ||
309afcb5 | 3078 | if (rc == 0) { |
83c47bcb | 3079 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3080 | spin_unlock_irqrestore(ap->lock, flags); |
3081 | ata_port_wait_eh(ap); | |
3082 | } else | |
3083 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3084 | |
3085 | return rc; | |
3086 | } | |
3057ac3c | 3087 | |
3088 | /** | |
d0171269 | 3089 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3090 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3091 | * |
d0171269 TH |
3092 | * After ATA pass thru (SAT) commands are executed successfully, |
3093 | * libata need to propagate the changes to SCSI layer. This | |
3094 | * function must be executed from ata_aux_wq such that sdev | |
3095 | * attach/detach don't race with rescan. | |
3057ac3c | 3096 | * |
d0171269 TH |
3097 | * LOCKING: |
3098 | * Kernel thread context (may sleep). | |
3057ac3c | 3099 | */ |
65f27f38 | 3100 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3101 | { |
65f27f38 DH |
3102 | struct ata_port *ap = |
3103 | container_of(work, struct ata_port, scsi_rescan_task); | |
f84e7e41 | 3104 | unsigned long flags; |
3057ac3c | 3105 | unsigned int i; |
3106 | ||
f84e7e41 TH |
3107 | spin_lock_irqsave(ap->lock, flags); |
3108 | ||
3057ac3c | 3109 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
f84e7e41 TH |
3110 | struct ata_device *dev = &ap->device[i]; |
3111 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3112 | |
f84e7e41 TH |
3113 | if (!ata_dev_enabled(dev) || !sdev) |
3114 | continue; | |
3115 | if (scsi_device_get(sdev)) | |
3116 | continue; | |
3117 | ||
3118 | spin_unlock_irqrestore(ap->lock, flags); | |
3119 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3120 | scsi_device_put(sdev); | |
3121 | spin_lock_irqsave(ap->lock, flags); | |
3057ac3c | 3122 | } |
f84e7e41 TH |
3123 | |
3124 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3125 | } |
80289167 BK |
3126 | |
3127 | /** | |
3128 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3129 | * @host: ATA host container for all SAS ports |
80289167 | 3130 | * @port_info: Information from low-level host driver |
cca3974e | 3131 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3132 | * |
3133 | * LOCKING: | |
3134 | * PCI/etc. bus probe sem. | |
3135 | * | |
3136 | * RETURNS: | |
3137 | * ata_port pointer on success / NULL on failure. | |
3138 | */ | |
3139 | ||
cca3974e | 3140 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3141 | struct ata_port_info *port_info, |
cca3974e | 3142 | struct Scsi_Host *shost) |
80289167 BK |
3143 | { |
3144 | struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
3145 | struct ata_probe_ent *ent; | |
3146 | ||
3147 | if (!ap) | |
3148 | return NULL; | |
3149 | ||
cca3974e | 3150 | ent = ata_probe_ent_alloc(host->dev, port_info); |
80289167 BK |
3151 | if (!ent) { |
3152 | kfree(ap); | |
3153 | return NULL; | |
3154 | } | |
3155 | ||
cca3974e JG |
3156 | ata_port_init(ap, host, ent, 0); |
3157 | ap->lock = shost->host_lock; | |
80289167 BK |
3158 | kfree(ent); |
3159 | return ap; | |
3160 | } | |
3161 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3162 | ||
3163 | /** | |
3164 | * ata_sas_port_start - Set port up for dma. | |
3165 | * @ap: Port to initialize | |
3166 | * | |
3167 | * Called just after data structures for each port are | |
3168 | * initialized. Allocates DMA pad. | |
3169 | * | |
3170 | * May be used as the port_start() entry in ata_port_operations. | |
3171 | * | |
3172 | * LOCKING: | |
3173 | * Inherited from caller. | |
3174 | */ | |
3175 | int ata_sas_port_start(struct ata_port *ap) | |
3176 | { | |
3177 | return ata_pad_alloc(ap, ap->dev); | |
3178 | } | |
3179 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3180 | ||
3181 | /** | |
3182 | * ata_port_stop - Undo ata_sas_port_start() | |
3183 | * @ap: Port to shut down | |
3184 | * | |
3185 | * Frees the DMA pad. | |
3186 | * | |
3187 | * May be used as the port_stop() entry in ata_port_operations. | |
3188 | * | |
3189 | * LOCKING: | |
3190 | * Inherited from caller. | |
3191 | */ | |
3192 | ||
3193 | void ata_sas_port_stop(struct ata_port *ap) | |
3194 | { | |
3195 | ata_pad_free(ap, ap->dev); | |
3196 | } | |
3197 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3198 | ||
3199 | /** | |
3200 | * ata_sas_port_init - Initialize a SATA device | |
3201 | * @ap: SATA port to initialize | |
3202 | * | |
3203 | * LOCKING: | |
3204 | * PCI/etc. bus probe sem. | |
3205 | * | |
3206 | * RETURNS: | |
3207 | * Zero on success, non-zero on error. | |
3208 | */ | |
3209 | ||
3210 | int ata_sas_port_init(struct ata_port *ap) | |
3211 | { | |
3212 | int rc = ap->ops->port_start(ap); | |
3213 | ||
3214 | if (!rc) | |
3215 | rc = ata_bus_probe(ap); | |
3216 | ||
3217 | return rc; | |
3218 | } | |
3219 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3220 | ||
3221 | /** | |
3222 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3223 | * @ap: SATA port to destroy | |
3224 | * | |
3225 | */ | |
3226 | ||
3227 | void ata_sas_port_destroy(struct ata_port *ap) | |
3228 | { | |
3229 | ap->ops->port_stop(ap); | |
3230 | kfree(ap); | |
3231 | } | |
3232 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3233 | ||
3234 | /** | |
3235 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3236 | * @sdev: SCSI device to configure | |
3237 | * @ap: ATA port to which SCSI device is attached | |
3238 | * | |
3239 | * RETURNS: | |
3240 | * Zero. | |
3241 | */ | |
3242 | ||
3243 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3244 | { | |
3245 | ata_scsi_sdev_config(sdev); | |
3246 | ata_scsi_dev_config(sdev, ap->device); | |
3247 | return 0; | |
3248 | } | |
3249 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3250 | ||
3251 | /** | |
3252 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3253 | * @cmd: SCSI command to be sent | |
3254 | * @done: Completion function, called when command is complete | |
3255 | * @ap: ATA port to which the command is being sent | |
3256 | * | |
3257 | * RETURNS: | |
08475a19 BK |
3258 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3259 | * 0 otherwise. | |
80289167 BK |
3260 | */ |
3261 | ||
3262 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3263 | struct ata_port *ap) | |
3264 | { | |
08475a19 BK |
3265 | int rc = 0; |
3266 | ||
80289167 BK |
3267 | ata_scsi_dump_cdb(ap, cmd); |
3268 | ||
3269 | if (likely(ata_scsi_dev_enabled(ap->device))) | |
08475a19 | 3270 | rc = __ata_scsi_queuecmd(cmd, done, ap->device); |
80289167 BK |
3271 | else { |
3272 | cmd->result = (DID_BAD_TARGET << 16); | |
3273 | done(cmd); | |
3274 | } | |
08475a19 | 3275 | return rc; |
80289167 BK |
3276 | } |
3277 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |