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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-scsi.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from | |
31 | * - http://www.t10.org/ | |
32 | * - http://www.t13.org/ | |
33 | * | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <scsi/scsi.h> | |
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]; | |
af068bd1 DM |
276 | u8 args[7], *sensebuf = NULL; |
277 | int cmd_result; | |
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 | ||
af068bd1 DM |
285 | sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); |
286 | if (!sensebuf) | |
287 | return -ENOMEM; | |
288 | ||
b095518e JG |
289 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
290 | scsi_cmd[0] = ATA_16; | |
291 | scsi_cmd[1] = (3 << 1); /* Non-data */ | |
af068bd1 | 292 | scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ |
b095518e JG |
293 | scsi_cmd[4] = args[1]; |
294 | scsi_cmd[6] = args[2]; | |
295 | scsi_cmd[8] = args[3]; | |
296 | scsi_cmd[10] = args[4]; | |
297 | scsi_cmd[12] = args[5]; | |
298 | scsi_cmd[14] = args[0]; | |
299 | ||
b095518e | 300 | /* Good values for timeout and retries? Values below |
2e9edbf8 | 301 | from scsi_ioctl_send_command() for default case... */ |
af068bd1 DM |
302 | cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, |
303 | sensebuf, (10*HZ), 5, 0); | |
304 | ||
305 | if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ | |
306 | u8 *desc = sensebuf + 8; | |
307 | cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ | |
308 | ||
309 | /* If we set cc then ATA pass-through will cause a | |
310 | * check condition even if no error. Filter that. */ | |
311 | if (cmd_result & SAM_STAT_CHECK_CONDITION) { | |
312 | struct scsi_sense_hdr sshdr; | |
313 | scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, | |
314 | &sshdr); | |
315 | if (sshdr.sense_key==0 && | |
316 | sshdr.asc==0 && sshdr.ascq==0) | |
317 | cmd_result &= ~SAM_STAT_CHECK_CONDITION; | |
318 | } | |
319 | ||
320 | /* Send userspace ATA registers */ | |
321 | if (sensebuf[0] == 0x72 && /* format is "descriptor" */ | |
322 | desc[0] == 0x09) {/* code is "ATA Descriptor" */ | |
323 | args[0] = desc[13]; /* status */ | |
324 | args[1] = desc[3]; /* error */ | |
325 | args[2] = desc[5]; /* sector count (0:7) */ | |
326 | args[3] = desc[7]; /* lbal */ | |
327 | args[4] = desc[9]; /* lbam */ | |
328 | args[5] = desc[11]; /* lbah */ | |
329 | args[6] = desc[12]; /* select */ | |
330 | if (copy_to_user(arg, args, sizeof(args))) | |
331 | rc = -EFAULT; | |
332 | } | |
333 | } | |
334 | ||
335 | if (cmd_result) { | |
b095518e | 336 | rc = -EIO; |
af068bd1 DM |
337 | goto error; |
338 | } | |
b095518e | 339 | |
af068bd1 DM |
340 | error: |
341 | kfree(sensebuf); | |
b095518e JG |
342 | return rc; |
343 | } | |
344 | ||
1da177e4 LT |
345 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
346 | { | |
1da177e4 LT |
347 | int val = -EINVAL, rc = -EINVAL; |
348 | ||
1da177e4 LT |
349 | switch (cmd) { |
350 | case ATA_IOC_GET_IO32: | |
351 | val = 0; | |
352 | if (copy_to_user(arg, &val, 1)) | |
353 | return -EFAULT; | |
354 | return 0; | |
355 | ||
356 | case ATA_IOC_SET_IO32: | |
357 | val = (unsigned long) arg; | |
358 | if (val != 0) | |
359 | return -EINVAL; | |
360 | return 0; | |
361 | ||
b095518e JG |
362 | case HDIO_DRIVE_CMD: |
363 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
364 | return -EACCES; | |
365 | return ata_cmd_ioctl(scsidev, arg); | |
366 | ||
367 | case HDIO_DRIVE_TASK: | |
368 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
369 | return -EACCES; | |
370 | return ata_task_ioctl(scsidev, arg); | |
371 | ||
1da177e4 LT |
372 | default: |
373 | rc = -ENOTTY; | |
374 | break; | |
375 | } | |
376 | ||
1da177e4 LT |
377 | return rc; |
378 | } | |
379 | ||
380 | /** | |
381 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference | |
1da177e4 LT |
382 | * @dev: ATA device to which the new command is attached |
383 | * @cmd: SCSI command that originated this ATA command | |
384 | * @done: SCSI command completion function | |
385 | * | |
386 | * Obtain a reference to an unused ata_queued_cmd structure, | |
387 | * which is the basic libata structure representing a single | |
388 | * ATA command sent to the hardware. | |
389 | * | |
390 | * If a command was available, fill in the SCSI-specific | |
391 | * portions of the structure with information on the | |
392 | * current command. | |
393 | * | |
394 | * LOCKING: | |
cca3974e | 395 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
396 | * |
397 | * RETURNS: | |
398 | * Command allocated, or %NULL if none available. | |
399 | */ | |
3373efd8 | 400 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
1da177e4 LT |
401 | struct scsi_cmnd *cmd, |
402 | void (*done)(struct scsi_cmnd *)) | |
403 | { | |
404 | struct ata_queued_cmd *qc; | |
405 | ||
3373efd8 | 406 | qc = ata_qc_new_init(dev); |
1da177e4 LT |
407 | if (qc) { |
408 | qc->scsicmd = cmd; | |
409 | qc->scsidone = done; | |
410 | ||
411 | if (cmd->use_sg) { | |
cedc9a47 | 412 | qc->__sg = (struct scatterlist *) cmd->request_buffer; |
1da177e4 | 413 | qc->n_elem = cmd->use_sg; |
7a801184 | 414 | } else if (cmd->request_bufflen) { |
cedc9a47 | 415 | qc->__sg = &qc->sgent; |
1da177e4 LT |
416 | qc->n_elem = 1; |
417 | } | |
418 | } else { | |
419 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); | |
420 | done(cmd); | |
421 | } | |
422 | ||
423 | return qc; | |
424 | } | |
425 | ||
b095518e JG |
426 | /** |
427 | * ata_dump_status - user friendly display of error info | |
428 | * @id: id of the port in question | |
429 | * @tf: ptr to filled out taskfile | |
430 | * | |
431 | * Decode and dump the ATA error/status registers for the user so | |
432 | * that they have some idea what really happened at the non | |
433 | * make-believe layer. | |
434 | * | |
435 | * LOCKING: | |
436 | * inherited from caller | |
437 | */ | |
438 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) | |
439 | { | |
440 | u8 stat = tf->command, err = tf->feature; | |
441 | ||
442 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); | |
443 | if (stat & ATA_BUSY) { | |
444 | printk("Busy }\n"); /* Data is not valid in this case */ | |
445 | } else { | |
446 | if (stat & 0x40) printk("DriveReady "); | |
447 | if (stat & 0x20) printk("DeviceFault "); | |
448 | if (stat & 0x10) printk("SeekComplete "); | |
449 | if (stat & 0x08) printk("DataRequest "); | |
450 | if (stat & 0x04) printk("CorrectedError "); | |
451 | if (stat & 0x02) printk("Index "); | |
452 | if (stat & 0x01) printk("Error "); | |
453 | printk("}\n"); | |
454 | ||
455 | if (err) { | |
456 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); | |
457 | if (err & 0x04) printk("DriveStatusError "); | |
458 | if (err & 0x80) { | |
459 | if (err & 0x04) printk("BadCRC "); | |
460 | else printk("Sector "); | |
461 | } | |
462 | if (err & 0x40) printk("UncorrectableError "); | |
463 | if (err & 0x10) printk("SectorIdNotFound "); | |
464 | if (err & 0x02) printk("TrackZeroNotFound "); | |
465 | if (err & 0x01) printk("AddrMarkNotFound "); | |
466 | printk("}\n"); | |
467 | } | |
468 | } | |
469 | } | |
470 | ||
d6f26d1f TH |
471 | /** |
472 | * ata_scsi_device_suspend - suspend ATA device associated with sdev | |
473 | * @sdev: the SCSI device to suspend | |
3c5100c1 | 474 | * @mesg: target power management message |
d6f26d1f TH |
475 | * |
476 | * Request suspend EH action on the ATA device associated with | |
477 | * @sdev and wait for the operation to complete. | |
478 | * | |
479 | * LOCKING: | |
480 | * Kernel thread context (may sleep). | |
481 | * | |
482 | * RETURNS: | |
483 | * 0 on success, -errno otherwise. | |
484 | */ | |
3c5100c1 | 485 | int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg) |
9b847548 | 486 | { |
35bb94b1 | 487 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
d6f26d1f TH |
488 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); |
489 | unsigned long flags; | |
490 | unsigned int action; | |
491 | int rc = 0; | |
492 | ||
493 | if (!dev) | |
494 | goto out; | |
495 | ||
496 | spin_lock_irqsave(ap->lock, flags); | |
497 | ||
498 | /* wait for the previous resume to complete */ | |
499 | while (dev->flags & ATA_DFLAG_SUSPENDED) { | |
500 | spin_unlock_irqrestore(ap->lock, flags); | |
501 | ata_port_wait_eh(ap); | |
502 | spin_lock_irqsave(ap->lock, flags); | |
503 | } | |
504 | ||
505 | /* if @sdev is already detached, nothing to do */ | |
506 | if (sdev->sdev_state == SDEV_OFFLINE || | |
507 | sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) | |
508 | goto out_unlock; | |
509 | ||
510 | /* request suspend */ | |
511 | action = ATA_EH_SUSPEND; | |
3c5100c1 | 512 | if (mesg.event != PM_EVENT_SUSPEND) |
d6f26d1f TH |
513 | action |= ATA_EH_PM_FREEZE; |
514 | ap->eh_info.dev_action[dev->devno] |= action; | |
515 | ap->eh_info.flags |= ATA_EHI_QUIET; | |
516 | ata_port_schedule_eh(ap); | |
517 | ||
518 | spin_unlock_irqrestore(ap->lock, flags); | |
9b847548 | 519 | |
d6f26d1f TH |
520 | /* wait for EH to do the job */ |
521 | ata_port_wait_eh(ap); | |
522 | ||
523 | spin_lock_irqsave(ap->lock, flags); | |
524 | ||
525 | /* If @sdev is still attached but the associated ATA device | |
526 | * isn't suspended, the operation failed. | |
527 | */ | |
528 | if (sdev->sdev_state != SDEV_OFFLINE && | |
529 | sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL && | |
530 | !(dev->flags & ATA_DFLAG_SUSPENDED)) | |
531 | rc = -EIO; | |
532 | ||
533 | out_unlock: | |
534 | spin_unlock_irqrestore(ap->lock, flags); | |
535 | out: | |
536 | if (rc == 0) | |
3c5100c1 | 537 | sdev->sdev_gendev.power.power_state = mesg; |
d6f26d1f | 538 | return rc; |
9b847548 JA |
539 | } |
540 | ||
d6f26d1f TH |
541 | /** |
542 | * ata_scsi_device_resume - resume ATA device associated with sdev | |
543 | * @sdev: the SCSI device to resume | |
544 | * | |
545 | * Request resume EH action on the ATA device associated with | |
546 | * @sdev and return immediately. This enables parallel | |
547 | * wakeup/spinup of devices. | |
548 | * | |
549 | * LOCKING: | |
550 | * Kernel thread context (may sleep). | |
551 | * | |
552 | * RETURNS: | |
553 | * 0. | |
554 | */ | |
555 | int ata_scsi_device_resume(struct scsi_device *sdev) | |
9b847548 | 556 | { |
35bb94b1 | 557 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
d6f26d1f TH |
558 | struct ata_device *dev = ata_scsi_find_dev(ap, sdev); |
559 | struct ata_eh_info *ehi = &ap->eh_info; | |
560 | unsigned long flags; | |
561 | unsigned int action; | |
562 | ||
563 | if (!dev) | |
564 | goto out; | |
565 | ||
566 | spin_lock_irqsave(ap->lock, flags); | |
567 | ||
568 | /* if @sdev is already detached, nothing to do */ | |
569 | if (sdev->sdev_state == SDEV_OFFLINE || | |
570 | sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) | |
571 | goto out_unlock; | |
572 | ||
573 | /* request resume */ | |
574 | action = ATA_EH_RESUME; | |
575 | if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND) | |
576 | __ata_ehi_hotplugged(ehi); | |
577 | else | |
578 | action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET; | |
579 | ehi->dev_action[dev->devno] |= action; | |
580 | ||
581 | /* We don't want autopsy and verbose EH messages. Disable | |
582 | * those if we're the only device on this link. | |
583 | */ | |
584 | if (ata_port_max_devices(ap) == 1) | |
585 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
586 | ||
587 | ata_port_schedule_eh(ap); | |
588 | ||
589 | out_unlock: | |
590 | spin_unlock_irqrestore(ap->lock, flags); | |
591 | out: | |
592 | sdev->sdev_gendev.power.power_state = PMSG_ON; | |
593 | return 0; | |
9b847548 JA |
594 | } |
595 | ||
1da177e4 LT |
596 | /** |
597 | * ata_to_sense_error - convert ATA error to SCSI error | |
8e8b77dd | 598 | * @id: ATA device number |
1da177e4 | 599 | * @drv_stat: value contained in ATA status register |
b095518e JG |
600 | * @drv_err: value contained in ATA error register |
601 | * @sk: the sense key we'll fill out | |
602 | * @asc: the additional sense code we'll fill out | |
603 | * @ascq: the additional sense code qualifier we'll fill out | |
246619da | 604 | * @verbose: be verbose |
1da177e4 | 605 | * |
b095518e JG |
606 | * Converts an ATA error into a SCSI error. Fill out pointers to |
607 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor | |
608 | * format sense blocks. | |
1da177e4 LT |
609 | * |
610 | * LOCKING: | |
cca3974e | 611 | * spin_lock_irqsave(host lock) |
1da177e4 | 612 | */ |
2e9edbf8 | 613 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
246619da | 614 | u8 *ascq, int verbose) |
1da177e4 | 615 | { |
b095518e | 616 | int i; |
ffe75ef6 | 617 | |
1da177e4 | 618 | /* Based on the 3ware driver translation table */ |
98ac62de | 619 | static const unsigned char sense_table[][4] = { |
1da177e4 LT |
620 | /* BBD|ECC|ID|MAR */ |
621 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
622 | /* BBD|ECC|ID */ | |
623 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command | |
624 | /* ECC|MC|MARK */ | |
625 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error | |
626 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ | |
627 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error | |
628 | /* MC|ID|ABRT|TRK0|MARK */ | |
629 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready | |
630 | /* MCR|MARK */ | |
631 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready | |
632 | /* Bad address mark */ | |
633 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field | |
634 | /* TRK0 */ | |
635 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error | |
636 | /* Abort & !ICRC */ | |
637 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command | |
638 | /* Media change request */ | |
639 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline | |
640 | /* SRV */ | |
641 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found | |
642 | /* Media change */ | |
643 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline | |
644 | /* ECC */ | |
645 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error | |
646 | /* BBD - block marked bad */ | |
647 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error | |
648 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
649 | }; | |
98ac62de | 650 | static const unsigned char stat_table[][4] = { |
1da177e4 LT |
651 | /* Must be first because BUSY means no other bits valid */ |
652 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now | |
653 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault | |
654 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now | |
655 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered | |
656 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark | |
657 | }; | |
1da177e4 | 658 | |
1da177e4 LT |
659 | /* |
660 | * Is this an error we can process/parse | |
661 | */ | |
b095518e JG |
662 | if (drv_stat & ATA_BUSY) { |
663 | drv_err = 0; /* Ignore the err bits, they're invalid */ | |
1da177e4 | 664 | } |
b095518e JG |
665 | |
666 | if (drv_err) { | |
667 | /* Look for drv_err */ | |
668 | for (i = 0; sense_table[i][0] != 0xFF; i++) { | |
669 | /* Look for best matches first */ | |
2e9edbf8 | 670 | if ((sense_table[i][0] & drv_err) == |
b095518e JG |
671 | sense_table[i][0]) { |
672 | *sk = sense_table[i][1]; | |
673 | *asc = sense_table[i][2]; | |
674 | *ascq = sense_table[i][3]; | |
675 | goto translate_done; | |
676 | } | |
677 | } | |
678 | /* No immediate match */ | |
246619da TH |
679 | if (verbose) |
680 | printk(KERN_WARNING "ata%u: no sense translation for " | |
681 | "error 0x%02x\n", id, drv_err); | |
1da177e4 | 682 | } |
b095518e JG |
683 | |
684 | /* Fall back to interpreting status bits */ | |
685 | for (i = 0; stat_table[i][0] != 0xFF; i++) { | |
686 | if (stat_table[i][0] & drv_stat) { | |
687 | *sk = stat_table[i][1]; | |
688 | *asc = stat_table[i][2]; | |
689 | *ascq = stat_table[i][3]; | |
690 | goto translate_done; | |
1da177e4 | 691 | } |
b095518e JG |
692 | } |
693 | /* No error? Undecoded? */ | |
246619da TH |
694 | if (verbose) |
695 | printk(KERN_WARNING "ata%u: no sense translation for " | |
696 | "status: 0x%02x\n", id, drv_stat); | |
b095518e | 697 | |
2d202024 AC |
698 | /* We need a sensible error return here, which is tricky, and one |
699 | that won't cause people to do things like return a disk wrongly */ | |
700 | *sk = ABORTED_COMMAND; | |
701 | *asc = 0x00; | |
702 | *ascq = 0x00; | |
b095518e JG |
703 | |
704 | translate_done: | |
246619da TH |
705 | if (verbose) |
706 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " | |
707 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", | |
708 | id, drv_stat, drv_err, *sk, *asc, *ascq); | |
b095518e JG |
709 | return; |
710 | } | |
711 | ||
712 | /* | |
750426aa | 713 | * ata_gen_passthru_sense - Generate check condition sense block. |
b095518e JG |
714 | * @qc: Command that completed. |
715 | * | |
716 | * This function is specific to the ATA descriptor format sense | |
717 | * block specified for the ATA pass through commands. Regardless | |
718 | * of whether the command errored or not, return a sense | |
719 | * block. Copy all controller registers into the sense | |
720 | * block. Clear sense key, ASC & ASCQ if there is no error. | |
721 | * | |
722 | * LOCKING: | |
750426aa | 723 | * None. |
b095518e | 724 | */ |
750426aa | 725 | static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) |
b095518e JG |
726 | { |
727 | struct scsi_cmnd *cmd = qc->scsicmd; | |
e61e0672 | 728 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e JG |
729 | unsigned char *sb = cmd->sense_buffer; |
730 | unsigned char *desc = sb + 8; | |
246619da | 731 | int verbose = qc->ap->ops->error_handler == NULL; |
b095518e JG |
732 | |
733 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
734 | ||
0e5dec47 | 735 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 736 | |
b095518e JG |
737 | /* |
738 | * Use ata_to_sense_error() to map status register bits | |
739 | * onto sense key, asc & ascq. | |
740 | */ | |
058e55e1 TH |
741 | if (qc->err_mask || |
742 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
b095518e | 743 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
246619da | 744 | &sb[1], &sb[2], &sb[3], verbose); |
b095518e | 745 | sb[1] &= 0x0f; |
1da177e4 LT |
746 | } |
747 | ||
b095518e JG |
748 | /* |
749 | * Sense data is current and format is descriptor. | |
750 | */ | |
751 | sb[0] = 0x72; | |
1da177e4 | 752 | |
b095518e JG |
753 | desc[0] = 0x09; |
754 | ||
f38621b3 TH |
755 | /* set length of additional sense data */ |
756 | sb[7] = 14; | |
757 | desc[1] = 12; | |
b095518e JG |
758 | |
759 | /* | |
760 | * Copy registers into sense buffer. | |
761 | */ | |
762 | desc[2] = 0x00; | |
763 | desc[3] = tf->feature; /* == error reg */ | |
764 | desc[5] = tf->nsect; | |
765 | desc[7] = tf->lbal; | |
766 | desc[9] = tf->lbam; | |
767 | desc[11] = tf->lbah; | |
768 | desc[12] = tf->device; | |
769 | desc[13] = tf->command; /* == status reg */ | |
770 | ||
771 | /* | |
772 | * Fill in Extend bit, and the high order bytes | |
773 | * if applicable. | |
774 | */ | |
775 | if (tf->flags & ATA_TFLAG_LBA48) { | |
776 | desc[2] |= 0x01; | |
777 | desc[4] = tf->hob_nsect; | |
778 | desc[6] = tf->hob_lbal; | |
779 | desc[8] = tf->hob_lbam; | |
780 | desc[10] = tf->hob_lbah; | |
1da177e4 | 781 | } |
b095518e | 782 | } |
1da177e4 | 783 | |
b095518e | 784 | /** |
750426aa | 785 | * ata_gen_ata_sense - generate a SCSI fixed sense block |
b095518e JG |
786 | * @qc: Command that we are erroring out |
787 | * | |
d25614ba TH |
788 | * Generate sense block for a failed ATA command @qc. Descriptor |
789 | * format is used to accomodate LBA48 block address. | |
b095518e JG |
790 | * |
791 | * LOCKING: | |
750426aa | 792 | * None. |
b095518e | 793 | */ |
750426aa | 794 | static void ata_gen_ata_sense(struct ata_queued_cmd *qc) |
b095518e | 795 | { |
d25614ba | 796 | struct ata_device *dev = qc->dev; |
b095518e | 797 | struct scsi_cmnd *cmd = qc->scsicmd; |
e61e0672 | 798 | struct ata_taskfile *tf = &qc->result_tf; |
b095518e | 799 | unsigned char *sb = cmd->sense_buffer; |
d25614ba | 800 | unsigned char *desc = sb + 8; |
246619da | 801 | int verbose = qc->ap->ops->error_handler == NULL; |
d25614ba | 802 | u64 block; |
b095518e JG |
803 | |
804 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); | |
805 | ||
0e5dec47 | 806 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
b095518e | 807 | |
d25614ba TH |
808 | /* sense data is current and format is descriptor */ |
809 | sb[0] = 0x72; | |
810 | ||
811 | /* Use ata_to_sense_error() to map status register bits | |
b095518e JG |
812 | * onto sense key, asc & ascq. |
813 | */ | |
058e55e1 TH |
814 | if (qc->err_mask || |
815 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { | |
b095518e | 816 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
d25614ba TH |
817 | &sb[1], &sb[2], &sb[3], verbose); |
818 | sb[1] &= 0x0f; | |
1da177e4 | 819 | } |
1da177e4 | 820 | |
d25614ba | 821 | block = ata_tf_read_block(&qc->result_tf, dev); |
a7dac447 | 822 | |
d25614ba TH |
823 | /* information sense data descriptor */ |
824 | sb[7] = 12; | |
825 | desc[0] = 0x00; | |
826 | desc[1] = 10; | |
a7dac447 | 827 | |
d25614ba TH |
828 | desc[2] |= 0x80; /* valid */ |
829 | desc[6] = block >> 40; | |
830 | desc[7] = block >> 32; | |
831 | desc[8] = block >> 24; | |
832 | desc[9] = block >> 16; | |
833 | desc[10] = block >> 8; | |
834 | desc[11] = block; | |
1da177e4 LT |
835 | } |
836 | ||
a6cce2a7 BK |
837 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
838 | { | |
839 | sdev->use_10_for_rw = 1; | |
840 | sdev->use_10_for_ms = 1; | |
841 | } | |
842 | ||
843 | static void ata_scsi_dev_config(struct scsi_device *sdev, | |
844 | struct ata_device *dev) | |
845 | { | |
914ed354 TH |
846 | /* configure max sectors */ |
847 | blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); | |
a6cce2a7 | 848 | |
914ed354 | 849 | /* SATA DMA transfers must be multiples of 4 byte, so |
a6cce2a7 BK |
850 | * we need to pad ATAPI transfers using an extra sg. |
851 | * Decrement max hw segments accordingly. | |
852 | */ | |
853 | if (dev->class == ATA_DEV_ATAPI) { | |
854 | request_queue_t *q = sdev->request_queue; | |
855 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); | |
856 | } | |
a6e6ce8e TH |
857 | |
858 | if (dev->flags & ATA_DFLAG_NCQ) { | |
859 | int depth; | |
860 | ||
861 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
862 | depth = min(ATA_MAX_QUEUE - 1, depth); | |
863 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); | |
864 | } | |
a6cce2a7 BK |
865 | } |
866 | ||
1da177e4 LT |
867 | /** |
868 | * ata_scsi_slave_config - Set SCSI device attributes | |
869 | * @sdev: SCSI device to examine | |
870 | * | |
871 | * This is called before we actually start reading | |
872 | * and writing to the device, to configure certain | |
873 | * SCSI mid-layer behaviors. | |
874 | * | |
875 | * LOCKING: | |
876 | * Defined by SCSI layer. We don't really care. | |
877 | */ | |
878 | ||
879 | int ata_scsi_slave_config(struct scsi_device *sdev) | |
880 | { | |
31534363 TH |
881 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
882 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); | |
883 | ||
a6cce2a7 | 884 | ata_scsi_sdev_config(sdev); |
1da177e4 LT |
885 | |
886 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); | |
887 | ||
31534363 | 888 | if (dev) |
a6cce2a7 | 889 | ata_scsi_dev_config(sdev, dev); |
1da177e4 LT |
890 | |
891 | return 0; /* scsi layer doesn't check return value, sigh */ | |
892 | } | |
893 | ||
83c47bcb TH |
894 | /** |
895 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed | |
896 | * @sdev: SCSI device to be destroyed | |
897 | * | |
898 | * @sdev is about to be destroyed for hot/warm unplugging. If | |
899 | * this unplugging was initiated by libata as indicated by NULL | |
900 | * dev->sdev, this function doesn't have to do anything. | |
901 | * Otherwise, SCSI layer initiated warm-unplug is in progress. | |
902 | * Clear dev->sdev, schedule the device for ATA detach and invoke | |
903 | * EH. | |
904 | * | |
905 | * LOCKING: | |
906 | * Defined by SCSI layer. We don't really care. | |
907 | */ | |
908 | void ata_scsi_slave_destroy(struct scsi_device *sdev) | |
909 | { | |
910 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
911 | unsigned long flags; | |
912 | struct ata_device *dev; | |
913 | ||
914 | if (!ap->ops->error_handler) | |
915 | return; | |
916 | ||
ba6a1308 | 917 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
918 | dev = __ata_scsi_find_dev(ap, sdev); |
919 | if (dev && dev->sdev) { | |
920 | /* SCSI device already in CANCEL state, no need to offline it */ | |
921 | dev->sdev = NULL; | |
922 | dev->flags |= ATA_DFLAG_DETACH; | |
923 | ata_port_schedule_eh(ap); | |
924 | } | |
ba6a1308 | 925 | spin_unlock_irqrestore(ap->lock, flags); |
83c47bcb TH |
926 | } |
927 | ||
a6e6ce8e TH |
928 | /** |
929 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config | |
930 | * @sdev: SCSI device to configure queue depth for | |
931 | * @queue_depth: new queue depth | |
932 | * | |
933 | * This is libata standard hostt->change_queue_depth callback. | |
934 | * SCSI will call into this callback when user tries to set queue | |
935 | * depth via sysfs. | |
936 | * | |
937 | * LOCKING: | |
938 | * SCSI layer (we don't care) | |
939 | * | |
940 | * RETURNS: | |
941 | * Newly configured queue depth. | |
942 | */ | |
943 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) | |
944 | { | |
945 | struct ata_port *ap = ata_shost_to_port(sdev->host); | |
946 | struct ata_device *dev; | |
360f654e | 947 | unsigned long flags; |
a6e6ce8e TH |
948 | int max_depth; |
949 | ||
950 | if (queue_depth < 1) | |
951 | return sdev->queue_depth; | |
952 | ||
953 | dev = ata_scsi_find_dev(ap, sdev); | |
954 | if (!dev || !ata_dev_enabled(dev)) | |
955 | return sdev->queue_depth; | |
956 | ||
957 | max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | |
958 | max_depth = min(ATA_MAX_QUEUE - 1, max_depth); | |
959 | if (queue_depth > max_depth) | |
960 | queue_depth = max_depth; | |
961 | ||
962 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); | |
360f654e TH |
963 | |
964 | spin_lock_irqsave(ap->lock, flags); | |
965 | if (queue_depth > 1) | |
966 | dev->flags &= ~ATA_DFLAG_NCQ_OFF; | |
967 | else | |
968 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
969 | spin_unlock_irqrestore(ap->lock, flags); | |
970 | ||
a6e6ce8e TH |
971 | return queue_depth; |
972 | } | |
973 | ||
972dcafb DG |
974 | /** |
975 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command | |
976 | * @qc: Storage for translated ATA taskfile | |
972dcafb DG |
977 | * |
978 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY | |
979 | * (to start). Perhaps these commands should be preceded by | |
980 | * CHECK POWER MODE to see what power mode the device is already in. | |
981 | * [See SAT revision 5 at www.t10.org] | |
982 | * | |
983 | * LOCKING: | |
cca3974e | 984 | * spin_lock_irqsave(host lock) |
972dcafb DG |
985 | * |
986 | * RETURNS: | |
987 | * Zero on success, non-zero on error. | |
988 | */ | |
ad706991 | 989 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) |
972dcafb | 990 | { |
542b1444 | 991 | struct scsi_cmnd *scmd = qc->scsicmd; |
972dcafb | 992 | struct ata_taskfile *tf = &qc->tf; |
ad706991 | 993 | const u8 *cdb = scmd->cmnd; |
972dcafb | 994 | |
2e5704f6 TH |
995 | if (scmd->cmd_len < 5) |
996 | goto invalid_fld; | |
997 | ||
972dcafb DG |
998 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
999 | tf->protocol = ATA_PROT_NODATA; | |
542b1444 | 1000 | if (cdb[1] & 0x1) { |
972dcafb DG |
1001 | ; /* ignore IMMED bit, violates sat-r05 */ |
1002 | } | |
542b1444 | 1003 | if (cdb[4] & 0x2) |
ae006510 | 1004 | goto invalid_fld; /* LOEJ bit set not supported */ |
542b1444 | 1005 | if (((cdb[4] >> 4) & 0xf) != 0) |
ae006510 | 1006 | goto invalid_fld; /* power conditions not supported */ |
542b1444 | 1007 | if (cdb[4] & 0x1) { |
972dcafb | 1008 | tf->nsect = 1; /* 1 sector, lba=0 */ |
9d5b1302 AL |
1009 | |
1010 | if (qc->dev->flags & ATA_DFLAG_LBA) { | |
c44078c0 | 1011 | tf->flags |= ATA_TFLAG_LBA; |
9d5b1302 AL |
1012 | |
1013 | tf->lbah = 0x0; | |
1014 | tf->lbam = 0x0; | |
1015 | tf->lbal = 0x0; | |
1016 | tf->device |= ATA_LBA; | |
1017 | } else { | |
1018 | /* CHS */ | |
1019 | tf->lbal = 0x1; /* sect */ | |
1020 | tf->lbam = 0x0; /* cyl low */ | |
1021 | tf->lbah = 0x0; /* cyl high */ | |
1022 | } | |
1023 | ||
972dcafb | 1024 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
78981a7c RH |
1025 | } else |
1026 | /* Issue ATA STANDBY IMMEDIATE command */ | |
1027 | tf->command = ATA_CMD_STANDBYNOW1; | |
1028 | ||
972dcafb DG |
1029 | /* |
1030 | * Standby and Idle condition timers could be implemented but that | |
1031 | * would require libata to implement the Power condition mode page | |
1032 | * and allow the user to change it. Changing mode pages requires | |
1033 | * MODE SELECT to be implemented. | |
1034 | */ | |
1035 | ||
1036 | return 0; | |
ae006510 DG |
1037 | |
1038 | invalid_fld: | |
542b1444 | 1039 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1040 | /* "Invalid field in cbd" */ |
1041 | return 1; | |
972dcafb DG |
1042 | } |
1043 | ||
1044 | ||
1da177e4 LT |
1045 | /** |
1046 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command | |
1047 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1048 | * |
1049 | * Sets up an ATA taskfile to issue FLUSH CACHE or | |
1050 | * FLUSH CACHE EXT. | |
1051 | * | |
1052 | * LOCKING: | |
cca3974e | 1053 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1054 | * |
1055 | * RETURNS: | |
1056 | * Zero on success, non-zero on error. | |
1057 | */ | |
ad706991 | 1058 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) |
1da177e4 LT |
1059 | { |
1060 | struct ata_taskfile *tf = &qc->tf; | |
1061 | ||
1062 | tf->flags |= ATA_TFLAG_DEVICE; | |
1063 | tf->protocol = ATA_PROT_NODATA; | |
1064 | ||
6fc49adb | 1065 | if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) |
1da177e4 LT |
1066 | tf->command = ATA_CMD_FLUSH_EXT; |
1067 | else | |
1068 | tf->command = ATA_CMD_FLUSH; | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
3aef5231 AL |
1073 | /** |
1074 | * scsi_6_lba_len - Get LBA and transfer length | |
542b1444 | 1075 | * @cdb: SCSI command to translate |
3aef5231 AL |
1076 | * |
1077 | * Calculate LBA and transfer length for 6-byte commands. | |
1078 | * | |
1079 | * RETURNS: | |
1080 | * @plba: the LBA | |
1081 | * @plen: the transfer length | |
1082 | */ | |
542b1444 | 1083 | static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1084 | { |
1085 | u64 lba = 0; | |
1086 | u32 len = 0; | |
1087 | ||
1088 | VPRINTK("six-byte command\n"); | |
1089 | ||
542b1444 TH |
1090 | lba |= ((u64)cdb[2]) << 8; |
1091 | lba |= ((u64)cdb[3]); | |
3aef5231 | 1092 | |
542b1444 | 1093 | len |= ((u32)cdb[4]); |
3aef5231 AL |
1094 | |
1095 | *plba = lba; | |
1096 | *plen = len; | |
1097 | } | |
1098 | ||
1099 | /** | |
1100 | * scsi_10_lba_len - Get LBA and transfer length | |
542b1444 | 1101 | * @cdb: SCSI command to translate |
3aef5231 AL |
1102 | * |
1103 | * Calculate LBA and transfer length for 10-byte commands. | |
1104 | * | |
1105 | * RETURNS: | |
1106 | * @plba: the LBA | |
1107 | * @plen: the transfer length | |
1108 | */ | |
542b1444 | 1109 | static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1110 | { |
1111 | u64 lba = 0; | |
1112 | u32 len = 0; | |
1113 | ||
1114 | VPRINTK("ten-byte command\n"); | |
1115 | ||
542b1444 TH |
1116 | lba |= ((u64)cdb[2]) << 24; |
1117 | lba |= ((u64)cdb[3]) << 16; | |
1118 | lba |= ((u64)cdb[4]) << 8; | |
1119 | lba |= ((u64)cdb[5]); | |
3aef5231 | 1120 | |
542b1444 TH |
1121 | len |= ((u32)cdb[7]) << 8; |
1122 | len |= ((u32)cdb[8]); | |
3aef5231 AL |
1123 | |
1124 | *plba = lba; | |
1125 | *plen = len; | |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * scsi_16_lba_len - Get LBA and transfer length | |
542b1444 | 1130 | * @cdb: SCSI command to translate |
3aef5231 AL |
1131 | * |
1132 | * Calculate LBA and transfer length for 16-byte commands. | |
1133 | * | |
1134 | * RETURNS: | |
1135 | * @plba: the LBA | |
1136 | * @plen: the transfer length | |
1137 | */ | |
542b1444 | 1138 | static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) |
3aef5231 AL |
1139 | { |
1140 | u64 lba = 0; | |
1141 | u32 len = 0; | |
1142 | ||
1143 | VPRINTK("sixteen-byte command\n"); | |
1144 | ||
542b1444 TH |
1145 | lba |= ((u64)cdb[2]) << 56; |
1146 | lba |= ((u64)cdb[3]) << 48; | |
1147 | lba |= ((u64)cdb[4]) << 40; | |
1148 | lba |= ((u64)cdb[5]) << 32; | |
1149 | lba |= ((u64)cdb[6]) << 24; | |
1150 | lba |= ((u64)cdb[7]) << 16; | |
1151 | lba |= ((u64)cdb[8]) << 8; | |
1152 | lba |= ((u64)cdb[9]); | |
3aef5231 | 1153 | |
542b1444 TH |
1154 | len |= ((u32)cdb[10]) << 24; |
1155 | len |= ((u32)cdb[11]) << 16; | |
1156 | len |= ((u32)cdb[12]) << 8; | |
1157 | len |= ((u32)cdb[13]); | |
3aef5231 AL |
1158 | |
1159 | *plba = lba; | |
1160 | *plen = len; | |
1161 | } | |
1162 | ||
1da177e4 LT |
1163 | /** |
1164 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one | |
1165 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1166 | * |
1167 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. | |
1168 | * | |
1169 | * LOCKING: | |
cca3974e | 1170 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1171 | * |
1172 | * RETURNS: | |
1173 | * Zero on success, non-zero on error. | |
1174 | */ | |
ad706991 | 1175 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1176 | { |
542b1444 | 1177 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 | 1178 | struct ata_taskfile *tf = &qc->tf; |
8bf62ece | 1179 | struct ata_device *dev = qc->dev; |
1da177e4 | 1180 | u64 dev_sectors = qc->dev->n_sectors; |
ad706991 | 1181 | const u8 *cdb = scmd->cmnd; |
3aef5231 AL |
1182 | u64 block; |
1183 | u32 n_block; | |
1da177e4 LT |
1184 | |
1185 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1186 | tf->protocol = ATA_PROT_NODATA; | |
1da177e4 | 1187 | |
2e5704f6 TH |
1188 | if (cdb[0] == VERIFY) { |
1189 | if (scmd->cmd_len < 10) | |
1190 | goto invalid_fld; | |
542b1444 | 1191 | scsi_10_lba_len(cdb, &block, &n_block); |
2e5704f6 TH |
1192 | } else if (cdb[0] == VERIFY_16) { |
1193 | if (scmd->cmd_len < 16) | |
1194 | goto invalid_fld; | |
542b1444 | 1195 | scsi_16_lba_len(cdb, &block, &n_block); |
2e5704f6 | 1196 | } else |
ae006510 | 1197 | goto invalid_fld; |
1da177e4 | 1198 | |
8bf62ece | 1199 | if (!n_block) |
ae006510 | 1200 | goto nothing_to_do; |
8bf62ece | 1201 | if (block >= dev_sectors) |
ae006510 | 1202 | goto out_of_range; |
8bf62ece | 1203 | if ((block + n_block) > dev_sectors) |
ae006510 | 1204 | goto out_of_range; |
1da177e4 | 1205 | |
07506697 AL |
1206 | if (dev->flags & ATA_DFLAG_LBA) { |
1207 | tf->flags |= ATA_TFLAG_LBA; | |
1208 | ||
c6a33e24 AL |
1209 | if (lba_28_ok(block, n_block)) { |
1210 | /* use LBA28 */ | |
1211 | tf->command = ATA_CMD_VERIFY; | |
1212 | tf->device |= (block >> 24) & 0xf; | |
1213 | } else if (lba_48_ok(block, n_block)) { | |
1214 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
1215 | goto out_of_range; | |
07506697 AL |
1216 | |
1217 | /* use LBA48 */ | |
1218 | tf->flags |= ATA_TFLAG_LBA48; | |
8bf62ece | 1219 | tf->command = ATA_CMD_VERIFY_EXT; |
1da177e4 | 1220 | |
8bf62ece | 1221 | tf->hob_nsect = (n_block >> 8) & 0xff; |
1da177e4 | 1222 | |
8bf62ece AL |
1223 | tf->hob_lbah = (block >> 40) & 0xff; |
1224 | tf->hob_lbam = (block >> 32) & 0xff; | |
1225 | tf->hob_lbal = (block >> 24) & 0xff; | |
c6a33e24 AL |
1226 | } else |
1227 | /* request too large even for LBA48 */ | |
1228 | goto out_of_range; | |
8bf62ece AL |
1229 | |
1230 | tf->nsect = n_block & 0xff; | |
1da177e4 | 1231 | |
8bf62ece AL |
1232 | tf->lbah = (block >> 16) & 0xff; |
1233 | tf->lbam = (block >> 8) & 0xff; | |
1234 | tf->lbal = block & 0xff; | |
1da177e4 | 1235 | |
8bf62ece AL |
1236 | tf->device |= ATA_LBA; |
1237 | } else { | |
1238 | /* CHS */ | |
1239 | u32 sect, head, cyl, track; | |
1240 | ||
c6a33e24 AL |
1241 | if (!lba_28_ok(block, n_block)) |
1242 | goto out_of_range; | |
07506697 | 1243 | |
8bf62ece AL |
1244 | /* Convert LBA to CHS */ |
1245 | track = (u32)block / dev->sectors; | |
1246 | cyl = track / dev->heads; | |
1247 | head = track % dev->heads; | |
1248 | sect = (u32)block % dev->sectors + 1; | |
1249 | ||
c187c4b5 AL |
1250 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
1251 | (u32)block, track, cyl, head, sect); | |
2e9edbf8 JG |
1252 | |
1253 | /* Check whether the converted CHS can fit. | |
1254 | Cylinder: 0-65535 | |
8bf62ece AL |
1255 | Head: 0-15 |
1256 | Sector: 1-255*/ | |
2e9edbf8 | 1257 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
ae006510 | 1258 | goto out_of_range; |
2e9edbf8 | 1259 | |
8bf62ece AL |
1260 | tf->command = ATA_CMD_VERIFY; |
1261 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
1262 | tf->lbal = sect; | |
1263 | tf->lbam = cyl; | |
1264 | tf->lbah = cyl >> 8; | |
1265 | tf->device |= head; | |
1266 | } | |
1da177e4 LT |
1267 | |
1268 | return 0; | |
ae006510 DG |
1269 | |
1270 | invalid_fld: | |
542b1444 | 1271 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1272 | /* "Invalid field in cbd" */ |
1273 | return 1; | |
1274 | ||
1275 | out_of_range: | |
542b1444 | 1276 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1277 | /* "Logical Block Address out of range" */ |
1278 | return 1; | |
1279 | ||
1280 | nothing_to_do: | |
542b1444 | 1281 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1282 | return 1; |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | /** | |
1286 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one | |
1287 | * @qc: Storage for translated ATA taskfile | |
1da177e4 LT |
1288 | * |
1289 | * Converts any of six SCSI read/write commands into the | |
1290 | * ATA counterpart, including starting sector (LBA), | |
1291 | * sector count, and taking into account the device's LBA48 | |
1292 | * support. | |
1293 | * | |
1294 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and | |
1295 | * %WRITE_16 are currently supported. | |
1296 | * | |
1297 | * LOCKING: | |
cca3974e | 1298 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1299 | * |
1300 | * RETURNS: | |
1301 | * Zero on success, non-zero on error. | |
1302 | */ | |
ad706991 | 1303 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 1304 | { |
542b1444 | 1305 | struct scsi_cmnd *scmd = qc->scsicmd; |
ad706991 | 1306 | const u8 *cdb = scmd->cmnd; |
bd056d7e | 1307 | unsigned int tf_flags = 0; |
3aef5231 AL |
1308 | u64 block; |
1309 | u32 n_block; | |
bd056d7e | 1310 | int rc; |
1da177e4 | 1311 | |
542b1444 | 1312 | if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) |
bd056d7e | 1313 | tf_flags |= ATA_TFLAG_WRITE; |
1da177e4 | 1314 | |
9a3dccc4 | 1315 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
542b1444 | 1316 | switch (cdb[0]) { |
3aef5231 AL |
1317 | case READ_10: |
1318 | case WRITE_10: | |
2e5704f6 TH |
1319 | if (unlikely(scmd->cmd_len < 10)) |
1320 | goto invalid_fld; | |
542b1444 TH |
1321 | scsi_10_lba_len(cdb, &block, &n_block); |
1322 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1323 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1324 | break; |
1325 | case READ_6: | |
1326 | case WRITE_6: | |
2e5704f6 TH |
1327 | if (unlikely(scmd->cmd_len < 6)) |
1328 | goto invalid_fld; | |
542b1444 | 1329 | scsi_6_lba_len(cdb, &block, &n_block); |
c187c4b5 AL |
1330 | |
1331 | /* for 6-byte r/w commands, transfer length 0 | |
1332 | * means 256 blocks of data, not 0 block. | |
1333 | */ | |
76b2bf9b JG |
1334 | if (!n_block) |
1335 | n_block = 256; | |
3aef5231 AL |
1336 | break; |
1337 | case READ_16: | |
1338 | case WRITE_16: | |
2e5704f6 TH |
1339 | if (unlikely(scmd->cmd_len < 16)) |
1340 | goto invalid_fld; | |
542b1444 TH |
1341 | scsi_16_lba_len(cdb, &block, &n_block); |
1342 | if (unlikely(cdb[1] & (1 << 3))) | |
bd056d7e | 1343 | tf_flags |= ATA_TFLAG_FUA; |
3aef5231 AL |
1344 | break; |
1345 | default: | |
8bf62ece | 1346 | DPRINTK("no-byte command\n"); |
ae006510 | 1347 | goto invalid_fld; |
1da177e4 LT |
1348 | } |
1349 | ||
8bf62ece AL |
1350 | /* Check and compose ATA command */ |
1351 | if (!n_block) | |
c187c4b5 AL |
1352 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
1353 | * length 0 means transfer 0 block of data. | |
1354 | * However, for ATA R/W commands, sector count 0 means | |
1355 | * 256 or 65536 sectors, not 0 sectors as in SCSI. | |
f51750d5 AC |
1356 | * |
1357 | * WARNING: one or two older ATA drives treat 0 as 0... | |
c187c4b5 | 1358 | */ |
ae006510 | 1359 | goto nothing_to_do; |
1da177e4 | 1360 | |
bd056d7e TH |
1361 | qc->flags |= ATA_QCFLAG_IO; |
1362 | qc->nsect = n_block; | |
1da177e4 | 1363 | |
bd056d7e TH |
1364 | rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, |
1365 | qc->tag); | |
1366 | if (likely(rc == 0)) | |
1367 | return 0; | |
ae006510 | 1368 | |
bd056d7e TH |
1369 | if (rc == -ERANGE) |
1370 | goto out_of_range; | |
1371 | /* treat all other errors as -EINVAL, fall through */ | |
ae006510 | 1372 | invalid_fld: |
542b1444 | 1373 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); |
ae006510 DG |
1374 | /* "Invalid field in cbd" */ |
1375 | return 1; | |
1376 | ||
1377 | out_of_range: | |
542b1444 | 1378 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); |
ae006510 DG |
1379 | /* "Logical Block Address out of range" */ |
1380 | return 1; | |
1381 | ||
1382 | nothing_to_do: | |
542b1444 | 1383 | scmd->result = SAM_STAT_GOOD; |
ae006510 | 1384 | return 1; |
1da177e4 LT |
1385 | } |
1386 | ||
77853bf2 | 1387 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 1388 | { |
c31f571d | 1389 | struct ata_port *ap = qc->ap; |
1da177e4 | 1390 | struct scsi_cmnd *cmd = qc->scsicmd; |
a7dac447 | 1391 | u8 *cdb = cmd->cmnd; |
a22e2eb0 | 1392 | int need_sense = (qc->err_mask != 0); |
b095518e | 1393 | |
3057ac3c | 1394 | /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and |
1395 | * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE | |
1396 | * cache | |
1397 | */ | |
c31f571d TH |
1398 | if (ap->ops->error_handler && |
1399 | !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) && | |
3057ac3c | 1400 | ((qc->tf.feature == SETFEATURES_WC_ON) || |
1401 | (qc->tf.feature == SETFEATURES_WC_OFF))) { | |
c31f571d TH |
1402 | ap->eh_info.action |= ATA_EH_REVALIDATE; |
1403 | ata_port_schedule_eh(ap); | |
3057ac3c | 1404 | } |
1405 | ||
b095518e JG |
1406 | /* For ATA pass thru (SAT) commands, generate a sense block if |
1407 | * user mandated it or if there's an error. Note that if we | |
1408 | * generate because the user forced us to, a check condition | |
1409 | * is generated and the ATA register values are returned | |
1410 | * whether the command completed successfully or not. If there | |
1411 | * was no error, SK, ASC and ASCQ will all be zero. | |
1412 | */ | |
a7dac447 JG |
1413 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
1414 | ((cdb[2] & 0x20) || need_sense)) { | |
750426aa | 1415 | ata_gen_passthru_sense(qc); |
b095518e JG |
1416 | } else { |
1417 | if (!need_sense) { | |
1418 | cmd->result = SAM_STAT_GOOD; | |
1419 | } else { | |
1420 | /* TODO: decide which descriptor format to use | |
1421 | * for 48b LBA devices and call that here | |
1422 | * instead of the fixed desc, which is only | |
1423 | * good for smaller LBA (and maybe CHS?) | |
1424 | * devices. | |
1425 | */ | |
750426aa | 1426 | ata_gen_ata_sense(qc); |
b095518e JG |
1427 | } |
1428 | } | |
1da177e4 | 1429 | |
c31f571d TH |
1430 | if (need_sense && !ap->ops->error_handler) |
1431 | ata_dump_status(ap->id, &qc->result_tf); | |
1da177e4 LT |
1432 | |
1433 | qc->scsidone(cmd); | |
1434 | ||
77853bf2 | 1435 | ata_qc_free(qc); |
1da177e4 LT |
1436 | } |
1437 | ||
3dc1d881 TH |
1438 | /** |
1439 | * ata_scmd_need_defer - Check whether we need to defer scmd | |
1440 | * @dev: ATA device to which the command is addressed | |
1441 | * @is_io: Is the command IO (and thus possibly NCQ)? | |
1442 | * | |
1443 | * NCQ and non-NCQ commands cannot run together. As upper layer | |
1444 | * only knows the queue depth, we are responsible for maintaining | |
1445 | * exclusion. This function checks whether a new command can be | |
1446 | * issued to @dev. | |
1447 | * | |
1448 | * LOCKING: | |
cca3974e | 1449 | * spin_lock_irqsave(host lock) |
3dc1d881 TH |
1450 | * |
1451 | * RETURNS: | |
1452 | * 1 if deferring is needed, 0 otherwise. | |
1453 | */ | |
1454 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) | |
1455 | { | |
1456 | struct ata_port *ap = dev->ap; | |
1457 | ||
1458 | if (!(dev->flags & ATA_DFLAG_NCQ)) | |
1459 | return 0; | |
1460 | ||
1461 | if (is_io) { | |
1462 | if (!ata_tag_valid(ap->active_tag)) | |
1463 | return 0; | |
1464 | } else { | |
1465 | if (!ata_tag_valid(ap->active_tag) && !ap->sactive) | |
1466 | return 0; | |
1467 | } | |
1468 | return 1; | |
1469 | } | |
1470 | ||
1da177e4 LT |
1471 | /** |
1472 | * ata_scsi_translate - Translate then issue SCSI command to ATA device | |
1da177e4 LT |
1473 | * @dev: ATA device to which the command is addressed |
1474 | * @cmd: SCSI command to execute | |
1475 | * @done: SCSI command completion function | |
1476 | * @xlat_func: Actor which translates @cmd to an ATA taskfile | |
1477 | * | |
1478 | * Our ->queuecommand() function has decided that the SCSI | |
1479 | * command issued can be directly translated into an ATA | |
1480 | * command, rather than handled internally. | |
1481 | * | |
1482 | * This function sets up an ata_queued_cmd structure for the | |
1483 | * SCSI command, and sends that ata_queued_cmd to the hardware. | |
1484 | * | |
ae006510 DG |
1485 | * The xlat_func argument (actor) returns 0 if ready to execute |
1486 | * ATA command, else 1 to finish translation. If 1 is returned | |
1487 | * then cmd->result (and possibly cmd->sense_buffer) are assumed | |
1488 | * to be set reflecting an error condition or clean (early) | |
1489 | * termination. | |
1490 | * | |
1da177e4 | 1491 | * LOCKING: |
cca3974e | 1492 | * spin_lock_irqsave(host lock) |
2115ea94 TH |
1493 | * |
1494 | * RETURNS: | |
1495 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command | |
1496 | * needs to be deferred. | |
1da177e4 | 1497 | */ |
2115ea94 TH |
1498 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1499 | void (*done)(struct scsi_cmnd *), | |
1500 | ata_xlat_func_t xlat_func) | |
1da177e4 LT |
1501 | { |
1502 | struct ata_queued_cmd *qc; | |
3dc1d881 | 1503 | int is_io = xlat_func == ata_scsi_rw_xlat; |
1da177e4 LT |
1504 | |
1505 | VPRINTK("ENTER\n"); | |
1506 | ||
3dc1d881 TH |
1507 | if (unlikely(ata_scmd_need_defer(dev, is_io))) |
1508 | goto defer; | |
1509 | ||
3373efd8 | 1510 | qc = ata_scsi_qc_new(dev, cmd, done); |
1da177e4 | 1511 | if (!qc) |
ae006510 | 1512 | goto err_mem; |
1da177e4 LT |
1513 | |
1514 | /* data is present; dma-map it */ | |
be7db055 | 1515 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
1516 | cmd->sc_data_direction == DMA_TO_DEVICE) { | |
1da177e4 | 1517 | if (unlikely(cmd->request_bufflen < 1)) { |
f15a1daf TH |
1518 | ata_dev_printk(dev, KERN_WARNING, |
1519 | "WARNING: zero len r/w req\n"); | |
ae006510 | 1520 | goto err_did; |
1da177e4 LT |
1521 | } |
1522 | ||
1523 | if (cmd->use_sg) | |
1524 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); | |
1525 | else | |
1526 | ata_sg_init_one(qc, cmd->request_buffer, | |
1527 | cmd->request_bufflen); | |
1528 | ||
1529 | qc->dma_dir = cmd->sc_data_direction; | |
1530 | } | |
1531 | ||
1532 | qc->complete_fn = ata_scsi_qc_complete; | |
1533 | ||
ad706991 | 1534 | if (xlat_func(qc)) |
ae006510 | 1535 | goto early_finish; |
1da177e4 LT |
1536 | |
1537 | /* select device, send command to hardware */ | |
8e0e694a | 1538 | ata_qc_issue(qc); |
1da177e4 LT |
1539 | |
1540 | VPRINTK("EXIT\n"); | |
2115ea94 | 1541 | return 0; |
1da177e4 | 1542 | |
ae006510 DG |
1543 | early_finish: |
1544 | ata_qc_free(qc); | |
1545 | done(cmd); | |
1546 | DPRINTK("EXIT - early finish (good or error)\n"); | |
2115ea94 | 1547 | return 0; |
ae006510 DG |
1548 | |
1549 | err_did: | |
1da177e4 | 1550 | ata_qc_free(qc); |
ae006510 DG |
1551 | cmd->result = (DID_ERROR << 16); |
1552 | done(cmd); | |
253b92ec | 1553 | err_mem: |
ae006510 | 1554 | DPRINTK("EXIT - internal\n"); |
2115ea94 | 1555 | return 0; |
3dc1d881 TH |
1556 | |
1557 | defer: | |
1558 | DPRINTK("EXIT - defer\n"); | |
1559 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1da177e4 LT |
1560 | } |
1561 | ||
1562 | /** | |
1563 | * ata_scsi_rbuf_get - Map response buffer. | |
1564 | * @cmd: SCSI command containing buffer to be mapped. | |
1565 | * @buf_out: Pointer to mapped area. | |
1566 | * | |
1567 | * Maps buffer contained within SCSI command @cmd. | |
1568 | * | |
1569 | * LOCKING: | |
cca3974e | 1570 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1571 | * |
1572 | * RETURNS: | |
1573 | * Length of response buffer. | |
1574 | */ | |
1575 | ||
1576 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) | |
1577 | { | |
1578 | u8 *buf; | |
1579 | unsigned int buflen; | |
1580 | ||
1581 | if (cmd->use_sg) { | |
1582 | struct scatterlist *sg; | |
1583 | ||
1584 | sg = (struct scatterlist *) cmd->request_buffer; | |
da02d2a1 | 1585 | buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; |
1da177e4 LT |
1586 | buflen = sg->length; |
1587 | } else { | |
1588 | buf = cmd->request_buffer; | |
1589 | buflen = cmd->request_bufflen; | |
1590 | } | |
1591 | ||
1592 | *buf_out = buf; | |
1593 | return buflen; | |
1594 | } | |
1595 | ||
1596 | /** | |
1597 | * ata_scsi_rbuf_put - Unmap response buffer. | |
1598 | * @cmd: SCSI command containing buffer to be unmapped. | |
1599 | * @buf: buffer to unmap | |
1600 | * | |
1601 | * Unmaps response buffer contained within @cmd. | |
1602 | * | |
1603 | * LOCKING: | |
cca3974e | 1604 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1605 | */ |
1606 | ||
1607 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) | |
1608 | { | |
1609 | if (cmd->use_sg) { | |
1610 | struct scatterlist *sg; | |
1611 | ||
1612 | sg = (struct scatterlist *) cmd->request_buffer; | |
da02d2a1 | 1613 | kunmap_atomic(buf - sg->offset, KM_IRQ0); |
1da177e4 LT |
1614 | } |
1615 | } | |
1616 | ||
1617 | /** | |
1618 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators | |
1619 | * @args: device IDENTIFY data / SCSI command of interest. | |
1620 | * @actor: Callback hook for desired SCSI command simulator | |
1621 | * | |
1622 | * Takes care of the hard work of simulating a SCSI command... | |
1623 | * Mapping the response buffer, calling the command's handler, | |
1624 | * and handling the handler's return value. This return value | |
1625 | * indicates whether the handler wishes the SCSI command to be | |
ae006510 DG |
1626 | * completed successfully (0), or not (in which case cmd->result |
1627 | * and sense buffer are assumed to be set). | |
1da177e4 LT |
1628 | * |
1629 | * LOCKING: | |
cca3974e | 1630 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1631 | */ |
1632 | ||
1633 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, | |
1634 | unsigned int (*actor) (struct ata_scsi_args *args, | |
1635 | u8 *rbuf, unsigned int buflen)) | |
1636 | { | |
1637 | u8 *rbuf; | |
1638 | unsigned int buflen, rc; | |
1639 | struct scsi_cmnd *cmd = args->cmd; | |
1640 | ||
1641 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); | |
1642 | memset(rbuf, 0, buflen); | |
1643 | rc = actor(args, rbuf, buflen); | |
1644 | ata_scsi_rbuf_put(cmd, rbuf); | |
1645 | ||
ae006510 | 1646 | if (rc == 0) |
1da177e4 | 1647 | cmd->result = SAM_STAT_GOOD; |
ae006510 | 1648 | args->done(cmd); |
1da177e4 LT |
1649 | } |
1650 | ||
6a36261e TH |
1651 | /** |
1652 | * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer | |
1653 | * @idx: byte index into SCSI response buffer | |
1654 | * @val: value to set | |
1655 | * | |
1656 | * To be used by SCSI command simulator functions. This macros | |
1657 | * expects two local variables, u8 *rbuf and unsigned int buflen, | |
1658 | * are in scope. | |
1659 | * | |
1660 | * LOCKING: | |
1661 | * None. | |
1662 | */ | |
1663 | #define ATA_SCSI_RBUF_SET(idx, val) do { \ | |
1664 | if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ | |
1665 | } while (0) | |
1666 | ||
1da177e4 LT |
1667 | /** |
1668 | * ata_scsiop_inq_std - Simulate INQUIRY command | |
1669 | * @args: device IDENTIFY data / SCSI command of interest. | |
1670 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1671 | * @buflen: Response buffer length. | |
1672 | * | |
1673 | * Returns standard device identification data associated | |
b142eb65 | 1674 | * with non-VPD INQUIRY command output. |
1da177e4 LT |
1675 | * |
1676 | * LOCKING: | |
cca3974e | 1677 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1678 | */ |
1679 | ||
1680 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, | |
1681 | unsigned int buflen) | |
1682 | { | |
1683 | u8 hdr[] = { | |
1684 | TYPE_DISK, | |
1685 | 0, | |
1686 | 0x5, /* claim SPC-3 version compatibility */ | |
1687 | 2, | |
1688 | 95 - 4 | |
1689 | }; | |
1690 | ||
1691 | /* set scsi removeable (RMB) bit per ata bit */ | |
1692 | if (ata_id_removeable(args->id)) | |
1693 | hdr[1] |= (1 << 7); | |
1694 | ||
1695 | VPRINTK("ENTER\n"); | |
1696 | ||
1697 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1698 | ||
1699 | if (buflen > 35) { | |
1700 | memcpy(&rbuf[8], "ATA ", 8); | |
6a62a04d TH |
1701 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); |
1702 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); | |
1da177e4 LT |
1703 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
1704 | memcpy(&rbuf[32], "n/a ", 4); | |
1705 | } | |
1706 | ||
1707 | if (buflen > 63) { | |
1708 | const u8 versions[] = { | |
1709 | 0x60, /* SAM-3 (no version claimed) */ | |
1710 | ||
1711 | 0x03, | |
1712 | 0x20, /* SBC-2 (no version claimed) */ | |
1713 | ||
1714 | 0x02, | |
1715 | 0x60 /* SPC-3 (no version claimed) */ | |
1716 | }; | |
1717 | ||
1718 | memcpy(rbuf + 59, versions, sizeof(versions)); | |
1719 | } | |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | /** | |
b142eb65 | 1725 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
1da177e4 LT |
1726 | * @args: device IDENTIFY data / SCSI command of interest. |
1727 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1728 | * @buflen: Response buffer length. | |
1729 | * | |
b142eb65 | 1730 | * Returns list of inquiry VPD pages available. |
1da177e4 LT |
1731 | * |
1732 | * LOCKING: | |
cca3974e | 1733 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1734 | */ |
1735 | ||
1736 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, | |
1737 | unsigned int buflen) | |
1738 | { | |
1739 | const u8 pages[] = { | |
1740 | 0x00, /* page 0x00, this page */ | |
1741 | 0x80, /* page 0x80, unit serial no page */ | |
1742 | 0x83 /* page 0x83, device ident page */ | |
1743 | }; | |
b142eb65 | 1744 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
1da177e4 LT |
1745 | |
1746 | if (buflen > 6) | |
1747 | memcpy(rbuf + 4, pages, sizeof(pages)); | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
1752 | /** | |
b142eb65 | 1753 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
1da177e4 LT |
1754 | * @args: device IDENTIFY data / SCSI command of interest. |
1755 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1756 | * @buflen: Response buffer length. | |
1757 | * | |
1758 | * Returns ATA device serial number. | |
1759 | * | |
1760 | * LOCKING: | |
cca3974e | 1761 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1762 | */ |
1763 | ||
1764 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, | |
1765 | unsigned int buflen) | |
1766 | { | |
1767 | const u8 hdr[] = { | |
1768 | 0, | |
1769 | 0x80, /* this page code */ | |
1770 | 0, | |
1771 | ATA_SERNO_LEN, /* page len */ | |
1772 | }; | |
1773 | memcpy(rbuf, hdr, sizeof(hdr)); | |
1774 | ||
1775 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) | |
6a62a04d TH |
1776 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
1777 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1da177e4 LT |
1778 | |
1779 | return 0; | |
1780 | } | |
1781 | ||
1da177e4 | 1782 | /** |
b142eb65 | 1783 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
1da177e4 LT |
1784 | * @args: device IDENTIFY data / SCSI command of interest. |
1785 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1786 | * @buflen: Response buffer length. | |
1787 | * | |
b142eb65 JG |
1788 | * Yields two logical unit device identification designators: |
1789 | * - vendor specific ASCII containing the ATA serial number | |
1790 | * - SAT defined "t10 vendor id based" containing ASCII vendor | |
1791 | * name ("ATA "), model and serial numbers. | |
1da177e4 LT |
1792 | * |
1793 | * LOCKING: | |
cca3974e | 1794 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1795 | */ |
1796 | ||
1797 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, | |
1798 | unsigned int buflen) | |
1799 | { | |
b142eb65 JG |
1800 | int num; |
1801 | const int sat_model_serial_desc_len = 68; | |
1802 | const int ata_model_byte_len = 40; | |
1da177e4 | 1803 | |
b142eb65 JG |
1804 | rbuf[1] = 0x83; /* this page code */ |
1805 | num = 4; | |
1806 | ||
1807 | if (buflen > (ATA_SERNO_LEN + num + 3)) { | |
1808 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ | |
2e9edbf8 | 1809 | rbuf[num + 0] = 2; |
b142eb65 JG |
1810 | rbuf[num + 3] = ATA_SERNO_LEN; |
1811 | num += 4; | |
1812 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1813 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1814 | num += ATA_SERNO_LEN; | |
1da177e4 | 1815 | } |
b142eb65 JG |
1816 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
1817 | /* SAT defined lu model and serial numbers descriptor */ | |
1818 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ | |
2e9edbf8 JG |
1819 | rbuf[num + 0] = 2; |
1820 | rbuf[num + 1] = 1; | |
b142eb65 JG |
1821 | rbuf[num + 3] = sat_model_serial_desc_len; |
1822 | num += 4; | |
1823 | memcpy(rbuf + num, "ATA ", 8); | |
1824 | num += 8; | |
1825 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1826 | ATA_ID_PROD_OFS, ata_model_byte_len); | |
1827 | num += ata_model_byte_len; | |
1828 | ata_id_string(args->id, (unsigned char *) rbuf + num, | |
1829 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); | |
1830 | num += ATA_SERNO_LEN; | |
1831 | } | |
1832 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ | |
1da177e4 LT |
1833 | return 0; |
1834 | } | |
1835 | ||
1836 | /** | |
0cba632b | 1837 | * ata_scsiop_noop - Command handler that simply returns success. |
1da177e4 LT |
1838 | * @args: device IDENTIFY data / SCSI command of interest. |
1839 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1840 | * @buflen: Response buffer length. | |
1841 | * | |
1842 | * No operation. Simply returns success to caller, to indicate | |
1843 | * that the caller should successfully complete this SCSI command. | |
1844 | * | |
1845 | * LOCKING: | |
cca3974e | 1846 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1847 | */ |
1848 | ||
1849 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, | |
1850 | unsigned int buflen) | |
1851 | { | |
1852 | VPRINTK("ENTER\n"); | |
1853 | return 0; | |
1854 | } | |
1855 | ||
1856 | /** | |
1857 | * ata_msense_push - Push data onto MODE SENSE data output buffer | |
1858 | * @ptr_io: (input/output) Location to store more output data | |
1859 | * @last: End of output data buffer | |
1860 | * @buf: Pointer to BLOB being added to output buffer | |
1861 | * @buflen: Length of BLOB | |
1862 | * | |
1863 | * Store MODE SENSE data on an output buffer. | |
1864 | * | |
1865 | * LOCKING: | |
1866 | * None. | |
1867 | */ | |
1868 | ||
1869 | static void ata_msense_push(u8 **ptr_io, const u8 *last, | |
1870 | const u8 *buf, unsigned int buflen) | |
1871 | { | |
1872 | u8 *ptr = *ptr_io; | |
1873 | ||
1874 | if ((ptr + buflen - 1) > last) | |
1875 | return; | |
1876 | ||
1877 | memcpy(ptr, buf, buflen); | |
1878 | ||
1879 | ptr += buflen; | |
1880 | ||
1881 | *ptr_io = ptr; | |
1882 | } | |
1883 | ||
1884 | /** | |
1885 | * ata_msense_caching - Simulate MODE SENSE caching info page | |
1886 | * @id: device IDENTIFY data | |
1887 | * @ptr_io: (input/output) Location to store more output data | |
1888 | * @last: End of output data buffer | |
1889 | * | |
1890 | * Generate a caching info page, which conditionally indicates | |
1891 | * write caching to the SCSI layer, depending on device | |
1892 | * capabilities. | |
1893 | * | |
1894 | * LOCKING: | |
1895 | * None. | |
1896 | */ | |
1897 | ||
1898 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, | |
1899 | const u8 *last) | |
1900 | { | |
00ac37f5 | 1901 | u8 page[CACHE_MPAGE_LEN]; |
1da177e4 | 1902 | |
00ac37f5 | 1903 | memcpy(page, def_cache_mpage, sizeof(page)); |
1da177e4 LT |
1904 | if (ata_id_wcache_enabled(id)) |
1905 | page[2] |= (1 << 2); /* write cache enable */ | |
1906 | if (!ata_id_rahead_enabled(id)) | |
1907 | page[12] |= (1 << 5); /* disable read ahead */ | |
1908 | ||
1909 | ata_msense_push(ptr_io, last, page, sizeof(page)); | |
1910 | return sizeof(page); | |
1911 | } | |
1912 | ||
1913 | /** | |
1914 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page | |
1915 | * @dev: Device associated with this MODE SENSE command | |
1916 | * @ptr_io: (input/output) Location to store more output data | |
1917 | * @last: End of output data buffer | |
1918 | * | |
1919 | * Generate a generic MODE SENSE control mode page. | |
1920 | * | |
1921 | * LOCKING: | |
1922 | * None. | |
1923 | */ | |
1924 | ||
1925 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) | |
1926 | { | |
00ac37f5 DG |
1927 | ata_msense_push(ptr_io, last, def_control_mpage, |
1928 | sizeof(def_control_mpage)); | |
1929 | return sizeof(def_control_mpage); | |
1da177e4 LT |
1930 | } |
1931 | ||
1932 | /** | |
1933 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page | |
1934 | * @dev: Device associated with this MODE SENSE command | |
1935 | * @ptr_io: (input/output) Location to store more output data | |
1936 | * @last: End of output data buffer | |
1937 | * | |
1938 | * Generate a generic MODE SENSE r/w error recovery page. | |
1939 | * | |
1940 | * LOCKING: | |
1941 | * None. | |
1942 | */ | |
1943 | ||
1944 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) | |
1945 | { | |
1da177e4 | 1946 | |
00ac37f5 DG |
1947 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
1948 | sizeof(def_rw_recovery_mpage)); | |
1949 | return sizeof(def_rw_recovery_mpage); | |
1da177e4 LT |
1950 | } |
1951 | ||
48bdc8ec JA |
1952 | /* |
1953 | * We can turn this into a real blacklist if it's needed, for now just | |
1954 | * blacklist any Maxtor BANC1G10 revision firmware | |
1955 | */ | |
1956 | static int ata_dev_supports_fua(u16 *id) | |
1957 | { | |
1958 | unsigned char model[41], fw[9]; | |
1959 | ||
c3c013a2 JG |
1960 | if (!libata_fua) |
1961 | return 0; | |
48bdc8ec JA |
1962 | if (!ata_id_has_fua(id)) |
1963 | return 0; | |
1964 | ||
6a62a04d TH |
1965 | ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model)); |
1966 | ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw)); | |
48bdc8ec | 1967 | |
2e02671d | 1968 | if (strcmp(model, "Maxtor")) |
48bdc8ec | 1969 | return 1; |
2e02671d | 1970 | if (strcmp(fw, "BANC1G10")) |
48bdc8ec JA |
1971 | return 1; |
1972 | ||
1973 | return 0; /* blacklisted */ | |
1974 | } | |
1975 | ||
1da177e4 LT |
1976 | /** |
1977 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands | |
1978 | * @args: device IDENTIFY data / SCSI command of interest. | |
1979 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
1980 | * @buflen: Response buffer length. | |
1981 | * | |
00ac37f5 DG |
1982 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
1983 | * access devices (e.g. disks) only. There should be no block | |
1984 | * descriptor for other device types. | |
1da177e4 LT |
1985 | * |
1986 | * LOCKING: | |
cca3974e | 1987 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
1988 | */ |
1989 | ||
1990 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, | |
1991 | unsigned int buflen) | |
1992 | { | |
9a3dccc4 | 1993 | struct ata_device *dev = args->dev; |
1da177e4 | 1994 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
00ac37f5 DG |
1995 | const u8 sat_blk_desc[] = { |
1996 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ | |
1997 | 0, | |
1998 | 0, 0x2, 0x0 /* block length: 512 bytes */ | |
1999 | }; | |
2000 | u8 pg, spg; | |
2001 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; | |
9a3dccc4 | 2002 | u8 dpofua; |
1da177e4 LT |
2003 | |
2004 | VPRINTK("ENTER\n"); | |
2005 | ||
2006 | six_byte = (scsicmd[0] == MODE_SENSE); | |
00ac37f5 DG |
2007 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
2008 | /* | |
2009 | * LLBA bit in msense(10) ignored (compliant) | |
1da177e4 | 2010 | */ |
00ac37f5 | 2011 | |
1da177e4 | 2012 | page_control = scsicmd[2] >> 6; |
ae006510 DG |
2013 | switch (page_control) { |
2014 | case 0: /* current */ | |
2015 | break; /* supported */ | |
2016 | case 3: /* saved */ | |
2017 | goto saving_not_supp; | |
2018 | case 1: /* changeable */ | |
2019 | case 2: /* defaults */ | |
2020 | default: | |
2021 | goto invalid_fld; | |
2022 | } | |
1da177e4 | 2023 | |
00ac37f5 DG |
2024 | if (six_byte) { |
2025 | output_len = 4 + (ebd ? 8 : 0); | |
2026 | alloc_len = scsicmd[4]; | |
2027 | } else { | |
2028 | output_len = 8 + (ebd ? 8 : 0); | |
2029 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; | |
2030 | } | |
2031 | minlen = (alloc_len < buflen) ? alloc_len : buflen; | |
1da177e4 LT |
2032 | |
2033 | p = rbuf + output_len; | |
00ac37f5 | 2034 | last = rbuf + minlen - 1; |
1da177e4 | 2035 | |
00ac37f5 DG |
2036 | pg = scsicmd[2] & 0x3f; |
2037 | spg = scsicmd[3]; | |
2038 | /* | |
2039 | * No mode subpages supported (yet) but asking for _all_ | |
2040 | * subpages may be valid | |
2041 | */ | |
2042 | if (spg && (spg != ALL_SUB_MPAGES)) | |
2043 | goto invalid_fld; | |
2044 | ||
2045 | switch(pg) { | |
2046 | case RW_RECOVERY_MPAGE: | |
1da177e4 LT |
2047 | output_len += ata_msense_rw_recovery(&p, last); |
2048 | break; | |
2049 | ||
00ac37f5 | 2050 | case CACHE_MPAGE: |
1da177e4 LT |
2051 | output_len += ata_msense_caching(args->id, &p, last); |
2052 | break; | |
2053 | ||
00ac37f5 | 2054 | case CONTROL_MPAGE: { |
1da177e4 LT |
2055 | output_len += ata_msense_ctl_mode(&p, last); |
2056 | break; | |
2057 | } | |
2058 | ||
00ac37f5 | 2059 | case ALL_MPAGES: |
1da177e4 LT |
2060 | output_len += ata_msense_rw_recovery(&p, last); |
2061 | output_len += ata_msense_caching(args->id, &p, last); | |
2062 | output_len += ata_msense_ctl_mode(&p, last); | |
2063 | break; | |
2064 | ||
2065 | default: /* invalid page code */ | |
ae006510 | 2066 | goto invalid_fld; |
1da177e4 LT |
2067 | } |
2068 | ||
00ac37f5 DG |
2069 | if (minlen < 1) |
2070 | return 0; | |
9a3dccc4 TH |
2071 | |
2072 | dpofua = 0; | |
f79d409f | 2073 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
9a3dccc4 TH |
2074 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
2075 | dpofua = 1 << 4; | |
2076 | ||
1da177e4 LT |
2077 | if (six_byte) { |
2078 | output_len--; | |
2079 | rbuf[0] = output_len; | |
9a3dccc4 TH |
2080 | if (minlen > 2) |
2081 | rbuf[2] |= dpofua; | |
00ac37f5 DG |
2082 | if (ebd) { |
2083 | if (minlen > 3) | |
2084 | rbuf[3] = sizeof(sat_blk_desc); | |
2085 | if (minlen > 11) | |
2086 | memcpy(rbuf + 4, sat_blk_desc, | |
2087 | sizeof(sat_blk_desc)); | |
2088 | } | |
1da177e4 LT |
2089 | } else { |
2090 | output_len -= 2; | |
2091 | rbuf[0] = output_len >> 8; | |
00ac37f5 DG |
2092 | if (minlen > 1) |
2093 | rbuf[1] = output_len; | |
9a3dccc4 TH |
2094 | if (minlen > 3) |
2095 | rbuf[3] |= dpofua; | |
00ac37f5 DG |
2096 | if (ebd) { |
2097 | if (minlen > 7) | |
2098 | rbuf[7] = sizeof(sat_blk_desc); | |
2099 | if (minlen > 15) | |
2100 | memcpy(rbuf + 8, sat_blk_desc, | |
2101 | sizeof(sat_blk_desc)); | |
2102 | } | |
1da177e4 | 2103 | } |
1da177e4 | 2104 | return 0; |
ae006510 DG |
2105 | |
2106 | invalid_fld: | |
2107 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); | |
2108 | /* "Invalid field in cbd" */ | |
2109 | return 1; | |
2110 | ||
2111 | saving_not_supp: | |
2112 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); | |
2113 | /* "Saving parameters not supported" */ | |
2114 | return 1; | |
1da177e4 LT |
2115 | } |
2116 | ||
2117 | /** | |
2118 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands | |
2119 | * @args: device IDENTIFY data / SCSI command of interest. | |
2120 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2121 | * @buflen: Response buffer length. | |
2122 | * | |
2123 | * Simulate READ CAPACITY commands. | |
2124 | * | |
2125 | * LOCKING: | |
6a36261e | 2126 | * None. |
1da177e4 | 2127 | */ |
1da177e4 LT |
2128 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
2129 | unsigned int buflen) | |
2130 | { | |
6a36261e | 2131 | u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ |
1da177e4 LT |
2132 | |
2133 | VPRINTK("ENTER\n"); | |
2134 | ||
1da177e4 | 2135 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
6a36261e TH |
2136 | if (last_lba >= 0xffffffffULL) |
2137 | last_lba = 0xffffffff; | |
0c144d0d | 2138 | |
1da177e4 | 2139 | /* sector count, 32-bit */ |
6a36261e TH |
2140 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); |
2141 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); | |
2142 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); | |
2143 | ATA_SCSI_RBUF_SET(3, last_lba); | |
1da177e4 LT |
2144 | |
2145 | /* sector size */ | |
6a36261e TH |
2146 | ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); |
2147 | ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE); | |
1da177e4 LT |
2148 | } else { |
2149 | /* sector count, 64-bit */ | |
6a36261e TH |
2150 | ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); |
2151 | ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); | |
2152 | ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); | |
2153 | ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); | |
2154 | ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); | |
2155 | ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); | |
2156 | ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); | |
2157 | ATA_SCSI_RBUF_SET(7, last_lba); | |
1da177e4 LT |
2158 | |
2159 | /* sector size */ | |
6a36261e TH |
2160 | ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); |
2161 | ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE); | |
1da177e4 LT |
2162 | } |
2163 | ||
2164 | return 0; | |
2165 | } | |
2166 | ||
2167 | /** | |
2168 | * ata_scsiop_report_luns - Simulate REPORT LUNS command | |
2169 | * @args: device IDENTIFY data / SCSI command of interest. | |
2170 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. | |
2171 | * @buflen: Response buffer length. | |
2172 | * | |
2173 | * Simulate REPORT LUNS command. | |
2174 | * | |
2175 | * LOCKING: | |
cca3974e | 2176 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2177 | */ |
2178 | ||
2179 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, | |
2180 | unsigned int buflen) | |
2181 | { | |
2182 | VPRINTK("ENTER\n"); | |
2183 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ | |
2184 | ||
2185 | return 0; | |
2186 | } | |
2187 | ||
845c5834 DG |
2188 | /** |
2189 | * ata_scsi_set_sense - Set SCSI sense data and status | |
2190 | * @cmd: SCSI request to be handled | |
2191 | * @sk: SCSI-defined sense key | |
2192 | * @asc: SCSI-defined additional sense code | |
2193 | * @ascq: SCSI-defined additional sense code qualifier | |
2194 | * | |
2195 | * Helper function that builds a valid fixed format, current | |
2196 | * response code and the given sense key (sk), additional sense | |
2197 | * code (asc) and additional sense code qualifier (ascq) with | |
2198 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and | |
2199 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . | |
2200 | * | |
2201 | * LOCKING: | |
2202 | * Not required | |
2203 | */ | |
2204 | ||
2205 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) | |
2206 | { | |
2207 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
2208 | ||
2209 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ | |
2210 | cmd->sense_buffer[2] = sk; | |
2211 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ | |
2212 | cmd->sense_buffer[12] = asc; | |
2213 | cmd->sense_buffer[13] = ascq; | |
2214 | } | |
2215 | ||
1da177e4 LT |
2216 | /** |
2217 | * ata_scsi_badcmd - End a SCSI request with an error | |
2218 | * @cmd: SCSI request to be handled | |
2219 | * @done: SCSI command completion function | |
2220 | * @asc: SCSI-defined additional sense code | |
2221 | * @ascq: SCSI-defined additional sense code qualifier | |
2222 | * | |
2223 | * Helper function that completes a SCSI command with | |
2224 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST | |
2225 | * and the specified additional sense codes. | |
2226 | * | |
2227 | * LOCKING: | |
cca3974e | 2228 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2229 | */ |
2230 | ||
2231 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) | |
2232 | { | |
2233 | DPRINTK("ENTER\n"); | |
ae006510 | 2234 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
1da177e4 LT |
2235 | |
2236 | done(cmd); | |
2237 | } | |
2238 | ||
77853bf2 | 2239 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
a939c963 | 2240 | { |
74e6c8c3 | 2241 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
c6e6e666 JG |
2242 | /* FIXME: not quite right; we don't want the |
2243 | * translation of taskfile registers into | |
2244 | * a sense descriptors, since that's only | |
2245 | * correct for ATA, not ATAPI | |
2246 | */ | |
750426aa | 2247 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2248 | } |
a939c963 | 2249 | |
c6e6e666 | 2250 | qc->scsidone(qc->scsicmd); |
77853bf2 | 2251 | ata_qc_free(qc); |
c6e6e666 | 2252 | } |
a939c963 | 2253 | |
c6e6e666 JG |
2254 | /* is it pointless to prefer PIO for "safety reasons"? */ |
2255 | static inline int ata_pio_use_silly(struct ata_port *ap) | |
2256 | { | |
2257 | return (ap->flags & ATA_FLAG_PIO_DMA); | |
2258 | } | |
2259 | ||
2260 | static void atapi_request_sense(struct ata_queued_cmd *qc) | |
2261 | { | |
2262 | struct ata_port *ap = qc->ap; | |
2263 | struct scsi_cmnd *cmd = qc->scsicmd; | |
2264 | ||
2265 | DPRINTK("ATAPI request sense\n"); | |
a939c963 JG |
2266 | |
2267 | /* FIXME: is this needed? */ | |
2268 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
2269 | ||
c6e6e666 JG |
2270 | ap->ops->tf_read(ap, &qc->tf); |
2271 | ||
2272 | /* fill these in, for the case where they are -not- overwritten */ | |
2273 | cmd->sense_buffer[0] = 0x70; | |
2274 | cmd->sense_buffer[2] = qc->tf.feature >> 4; | |
2275 | ||
2276 | ata_qc_reinit(qc); | |
2277 | ||
a939c963 JG |
2278 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
2279 | qc->dma_dir = DMA_FROM_DEVICE; | |
2280 | ||
6e7846e9 | 2281 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
a939c963 JG |
2282 | qc->cdb[0] = REQUEST_SENSE; |
2283 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2284 | ||
2285 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2286 | qc->tf.command = ATA_CMD_PACKET; | |
2287 | ||
c6e6e666 JG |
2288 | if (ata_pio_use_silly(ap)) { |
2289 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2290 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2291 | } else { | |
2292 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2293 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2294 | qc->tf.lbah = (8 * 1024) >> 8; | |
2295 | } | |
a939c963 JG |
2296 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
2297 | ||
c6e6e666 | 2298 | qc->complete_fn = atapi_sense_complete; |
a939c963 | 2299 | |
8e0e694a | 2300 | ata_qc_issue(qc); |
a939c963 JG |
2301 | |
2302 | DPRINTK("EXIT\n"); | |
2303 | } | |
2304 | ||
77853bf2 | 2305 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 LT |
2306 | { |
2307 | struct scsi_cmnd *cmd = qc->scsicmd; | |
a22e2eb0 | 2308 | unsigned int err_mask = qc->err_mask; |
1da177e4 | 2309 | |
a7dac447 | 2310 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
e12669e7 | 2311 | |
246619da TH |
2312 | /* handle completion from new EH */ |
2313 | if (unlikely(qc->ap->ops->error_handler && | |
2314 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { | |
2315 | ||
2316 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { | |
2317 | /* FIXME: not quite right; we don't want the | |
2318 | * translation of taskfile registers into a | |
2319 | * sense descriptors, since that's only | |
2320 | * correct for ATA, not ATAPI | |
2321 | */ | |
750426aa | 2322 | ata_gen_passthru_sense(qc); |
246619da TH |
2323 | } |
2324 | ||
22aac089 TH |
2325 | /* SCSI EH automatically locks door if sdev->locked is |
2326 | * set. Sometimes door lock request continues to | |
2327 | * fail, for example, when no media is present. This | |
2328 | * creates a loop - SCSI EH issues door lock which | |
2329 | * fails and gets invoked again to acquire sense data | |
2330 | * for the failed command. | |
2331 | * | |
2332 | * If door lock fails, always clear sdev->locked to | |
2333 | * avoid this infinite loop. | |
2334 | */ | |
2335 | if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) | |
2336 | qc->dev->sdev->locked = 0; | |
2337 | ||
246619da TH |
2338 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
2339 | qc->scsidone(cmd); | |
2340 | ata_qc_free(qc); | |
2341 | return; | |
2342 | } | |
2343 | ||
2344 | /* successful completion or old EH failure path */ | |
a7dac447 | 2345 | if (unlikely(err_mask & AC_ERR_DEV)) { |
1da177e4 | 2346 | cmd->result = SAM_STAT_CHECK_CONDITION; |
c6e6e666 | 2347 | atapi_request_sense(qc); |
77853bf2 | 2348 | return; |
74e6c8c3 | 2349 | } else if (unlikely(err_mask)) { |
a7dac447 JG |
2350 | /* FIXME: not quite right; we don't want the |
2351 | * translation of taskfile registers into | |
2352 | * a sense descriptors, since that's only | |
2353 | * correct for ATA, not ATAPI | |
2354 | */ | |
750426aa | 2355 | ata_gen_passthru_sense(qc); |
74e6c8c3 | 2356 | } else { |
1da177e4 LT |
2357 | u8 *scsicmd = cmd->cmnd; |
2358 | ||
fd71da46 | 2359 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
1da177e4 LT |
2360 | u8 *buf = NULL; |
2361 | unsigned int buflen; | |
2362 | ||
2363 | buflen = ata_scsi_rbuf_get(cmd, &buf); | |
a15dbeb4 JG |
2364 | |
2365 | /* ATAPI devices typically report zero for their SCSI version, | |
2366 | * and sometimes deviate from the spec WRT response data | |
2367 | * format. If SCSI version is reported as zero like normal, | |
2368 | * then we make the following fixups: 1) Fake MMC-5 version, | |
2369 | * to indicate to the Linux scsi midlayer this is a modern | |
2370 | * device. 2) Ensure response data format / ATAPI information | |
2371 | * are always correct. | |
a15dbeb4 JG |
2372 | */ |
2373 | if (buf[2] == 0) { | |
2374 | buf[2] = 0x5; | |
2375 | buf[3] = 0x32; | |
2376 | } | |
2377 | ||
1da177e4 LT |
2378 | ata_scsi_rbuf_put(cmd, buf); |
2379 | } | |
a15dbeb4 | 2380 | |
1da177e4 LT |
2381 | cmd->result = SAM_STAT_GOOD; |
2382 | } | |
2383 | ||
2384 | qc->scsidone(cmd); | |
77853bf2 | 2385 | ata_qc_free(qc); |
1da177e4 LT |
2386 | } |
2387 | /** | |
2388 | * atapi_xlat - Initialize PACKET taskfile | |
2389 | * @qc: command structure to be initialized | |
1da177e4 LT |
2390 | * |
2391 | * LOCKING: | |
cca3974e | 2392 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2393 | * |
2394 | * RETURNS: | |
2395 | * Zero on success, non-zero on failure. | |
2396 | */ | |
ad706991 | 2397 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc) |
1da177e4 | 2398 | { |
542b1444 | 2399 | struct scsi_cmnd *scmd = qc->scsicmd; |
1da177e4 LT |
2400 | struct ata_device *dev = qc->dev; |
2401 | int using_pio = (dev->flags & ATA_DFLAG_PIO); | |
542b1444 | 2402 | int nodata = (scmd->sc_data_direction == DMA_NONE); |
1da177e4 LT |
2403 | |
2404 | if (!using_pio) | |
2405 | /* Check whether ATAPI DMA is safe */ | |
2406 | if (ata_check_atapi_dma(qc)) | |
2407 | using_pio = 1; | |
2408 | ||
2e5704f6 TH |
2409 | memset(qc->cdb, 0, dev->cdb_len); |
2410 | memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); | |
1da177e4 LT |
2411 | |
2412 | qc->complete_fn = atapi_qc_complete; | |
2413 | ||
2414 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
542b1444 | 2415 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 LT |
2416 | qc->tf.flags |= ATA_TFLAG_WRITE; |
2417 | DPRINTK("direction: write\n"); | |
2418 | } | |
2419 | ||
2420 | qc->tf.command = ATA_CMD_PACKET; | |
2421 | ||
2422 | /* no data, or PIO data xfer */ | |
2423 | if (using_pio || nodata) { | |
2424 | if (nodata) | |
2425 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; | |
2426 | else | |
2427 | qc->tf.protocol = ATA_PROT_ATAPI; | |
2428 | qc->tf.lbam = (8 * 1024) & 0xff; | |
2429 | qc->tf.lbah = (8 * 1024) >> 8; | |
2430 | } | |
2431 | ||
2432 | /* DMA data xfer */ | |
2433 | else { | |
2434 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; | |
2435 | qc->tf.feature |= ATAPI_PKT_DMA; | |
2436 | ||
542b1444 | 2437 | if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE)) |
95de719a | 2438 | /* some SATA bridges need us to indicate data xfer direction */ |
1da177e4 | 2439 | qc->tf.feature |= ATAPI_DMADIR; |
1da177e4 LT |
2440 | } |
2441 | ||
542b1444 | 2442 | qc->nbytes = scmd->request_bufflen; |
1da177e4 LT |
2443 | |
2444 | return 0; | |
2445 | } | |
2446 | ||
ab5b3a5b TH |
2447 | static struct ata_device * ata_find_dev(struct ata_port *ap, int id) |
2448 | { | |
2449 | if (likely(id < ATA_MAX_DEVICES)) | |
2450 | return &ap->device[id]; | |
2451 | return NULL; | |
2452 | } | |
2453 | ||
2454 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, | |
2455 | const struct scsi_device *scsidev) | |
2456 | { | |
2457 | /* skip commands not addressed to targets we simulate */ | |
2458 | if (unlikely(scsidev->channel || scsidev->lun)) | |
2459 | return NULL; | |
2460 | ||
2461 | return ata_find_dev(ap, scsidev->id); | |
2462 | } | |
2463 | ||
99ba9e09 BK |
2464 | /** |
2465 | * ata_scsi_dev_enabled - determine if device is enabled | |
2466 | * @dev: ATA device | |
2467 | * | |
2468 | * Determine if commands should be sent to the specified device. | |
2469 | * | |
2470 | * LOCKING: | |
cca3974e | 2471 | * spin_lock_irqsave(host lock) |
99ba9e09 BK |
2472 | * |
2473 | * RETURNS: | |
2474 | * 0 if commands are not allowed / 1 if commands are allowed | |
2475 | */ | |
2476 | ||
2477 | static int ata_scsi_dev_enabled(struct ata_device *dev) | |
2478 | { | |
2479 | if (unlikely(!ata_dev_enabled(dev))) | |
2480 | return 0; | |
2481 | ||
2482 | if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { | |
2483 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { | |
2484 | ata_dev_printk(dev, KERN_WARNING, | |
2485 | "WARNING: ATAPI is %s, device ignored.\n", | |
2486 | atapi_enabled ? "not supported with this driver" : "disabled"); | |
2487 | return 0; | |
2488 | } | |
2489 | } | |
2490 | ||
2491 | return 1; | |
2492 | } | |
2493 | ||
1da177e4 LT |
2494 | /** |
2495 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd | |
2496 | * @ap: ATA port to which the device is attached | |
2497 | * @scsidev: SCSI device from which we derive the ATA device | |
2498 | * | |
2499 | * Given various information provided in struct scsi_cmnd, | |
2500 | * map that onto an ATA bus, and using that mapping | |
2501 | * determine which ata_device is associated with the | |
2502 | * SCSI command to be sent. | |
2503 | * | |
2504 | * LOCKING: | |
cca3974e | 2505 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2506 | * |
2507 | * RETURNS: | |
2508 | * Associated ATA device, or %NULL if not found. | |
2509 | */ | |
1da177e4 | 2510 | static struct ata_device * |
057ace5e | 2511 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
1da177e4 | 2512 | { |
ab5b3a5b | 2513 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
1da177e4 | 2514 | |
99ba9e09 | 2515 | if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) |
1da177e4 LT |
2516 | return NULL; |
2517 | ||
1da177e4 LT |
2518 | return dev; |
2519 | } | |
2520 | ||
b095518e JG |
2521 | /* |
2522 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. | |
2523 | * @byte1: Byte 1 from pass-thru CDB. | |
2524 | * | |
2525 | * RETURNS: | |
2526 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. | |
2527 | */ | |
2528 | static u8 | |
2529 | ata_scsi_map_proto(u8 byte1) | |
2530 | { | |
2531 | switch((byte1 & 0x1e) >> 1) { | |
2532 | case 3: /* Non-data */ | |
2533 | return ATA_PROT_NODATA; | |
2534 | ||
2535 | case 6: /* DMA */ | |
2536 | return ATA_PROT_DMA; | |
2537 | ||
2538 | case 4: /* PIO Data-in */ | |
2539 | case 5: /* PIO Data-out */ | |
b095518e JG |
2540 | return ATA_PROT_PIO; |
2541 | ||
2542 | case 10: /* Device Reset */ | |
2543 | case 0: /* Hard Reset */ | |
2544 | case 1: /* SRST */ | |
2545 | case 2: /* Bus Idle */ | |
2546 | case 7: /* Packet */ | |
2547 | case 8: /* DMA Queued */ | |
2548 | case 9: /* Device Diagnostic */ | |
2549 | case 11: /* UDMA Data-in */ | |
2550 | case 12: /* UDMA Data-Out */ | |
2551 | case 13: /* FPDMA */ | |
2552 | default: /* Reserved */ | |
2553 | break; | |
2554 | } | |
2555 | ||
2556 | return ATA_PROT_UNKNOWN; | |
2557 | } | |
2558 | ||
2559 | /** | |
2560 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile | |
2561 | * @qc: command structure to be initialized | |
b095518e JG |
2562 | * |
2563 | * Handles either 12 or 16-byte versions of the CDB. | |
2564 | * | |
2565 | * RETURNS: | |
2566 | * Zero on success, non-zero on failure. | |
2567 | */ | |
ad706991 | 2568 | static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) |
b095518e JG |
2569 | { |
2570 | struct ata_taskfile *tf = &(qc->tf); | |
542b1444 | 2571 | struct scsi_cmnd *scmd = qc->scsicmd; |
f79d409f | 2572 | struct ata_device *dev = qc->dev; |
ad706991 | 2573 | const u8 *cdb = scmd->cmnd; |
b095518e | 2574 | |
542b1444 | 2575 | if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) |
9a405257 | 2576 | goto invalid_fld; |
8190bdb9 | 2577 | |
f79d409f AC |
2578 | /* We may not issue DMA commands if no DMA mode is set */ |
2579 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) | |
2580 | goto invalid_fld; | |
b095518e | 2581 | |
542b1444 | 2582 | if (cdb[1] & 0xe0) |
f59b0cf8 AL |
2583 | /* PIO multi not supported yet */ |
2584 | goto invalid_fld; | |
2585 | ||
b095518e JG |
2586 | /* |
2587 | * 12 and 16 byte CDBs use different offsets to | |
2588 | * provide the various register values. | |
2589 | */ | |
542b1444 | 2590 | if (cdb[0] == ATA_16) { |
b095518e JG |
2591 | /* |
2592 | * 16-byte CDB - may contain extended commands. | |
2593 | * | |
2594 | * If that is the case, copy the upper byte register values. | |
2595 | */ | |
542b1444 TH |
2596 | if (cdb[1] & 0x01) { |
2597 | tf->hob_feature = cdb[3]; | |
2598 | tf->hob_nsect = cdb[5]; | |
2599 | tf->hob_lbal = cdb[7]; | |
2600 | tf->hob_lbam = cdb[9]; | |
2601 | tf->hob_lbah = cdb[11]; | |
b095518e JG |
2602 | tf->flags |= ATA_TFLAG_LBA48; |
2603 | } else | |
2604 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2605 | ||
2606 | /* | |
2607 | * Always copy low byte, device and command registers. | |
2608 | */ | |
542b1444 TH |
2609 | tf->feature = cdb[4]; |
2610 | tf->nsect = cdb[6]; | |
2611 | tf->lbal = cdb[8]; | |
2612 | tf->lbam = cdb[10]; | |
2613 | tf->lbah = cdb[12]; | |
2614 | tf->device = cdb[13]; | |
2615 | tf->command = cdb[14]; | |
b095518e JG |
2616 | } else { |
2617 | /* | |
2618 | * 12-byte CDB - incapable of extended commands. | |
2619 | */ | |
2620 | tf->flags &= ~ATA_TFLAG_LBA48; | |
2621 | ||
542b1444 TH |
2622 | tf->feature = cdb[3]; |
2623 | tf->nsect = cdb[4]; | |
2624 | tf->lbal = cdb[5]; | |
2625 | tf->lbam = cdb[6]; | |
2626 | tf->lbah = cdb[7]; | |
2627 | tf->device = cdb[8]; | |
2628 | tf->command = cdb[9]; | |
b095518e | 2629 | } |
dcc2d1e7 ML |
2630 | /* |
2631 | * If slave is possible, enforce correct master/slave bit | |
2632 | */ | |
2633 | if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) | |
2634 | tf->device = qc->dev->devno ? | |
2635 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; | |
b095518e JG |
2636 | |
2637 | /* | |
2638 | * Filter SET_FEATURES - XFER MODE command -- otherwise, | |
2639 | * SET_FEATURES - XFER MODE must be preceded/succeeded | |
2640 | * by an update to hardware-specific registers for each | |
2641 | * controller (i.e. the reason for ->set_piomode(), | |
2642 | * ->set_dmamode(), and ->post_set_mode() hooks). | |
2643 | */ | |
2644 | if ((tf->command == ATA_CMD_SET_FEATURES) | |
2645 | && (tf->feature == SETFEATURES_XFER)) | |
9a405257 | 2646 | goto invalid_fld; |
b095518e JG |
2647 | |
2648 | /* | |
2649 | * Set flags so that all registers will be written, | |
2650 | * and pass on write indication (used for PIO/DMA | |
2651 | * setup.) | |
2652 | */ | |
2653 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); | |
2654 | ||
542b1444 | 2655 | if (scmd->sc_data_direction == DMA_TO_DEVICE) |
b095518e JG |
2656 | tf->flags |= ATA_TFLAG_WRITE; |
2657 | ||
2658 | /* | |
2659 | * Set transfer length. | |
2660 | * | |
2661 | * TODO: find out if we need to do more here to | |
2662 | * cover scatter/gather case. | |
2663 | */ | |
542b1444 | 2664 | qc->nsect = scmd->request_bufflen / ATA_SECT_SIZE; |
b095518e | 2665 | |
e61e0672 TH |
2666 | /* request result TF */ |
2667 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
2668 | ||
b095518e | 2669 | return 0; |
9a405257 TH |
2670 | |
2671 | invalid_fld: | |
542b1444 | 2672 | ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); |
9a405257 TH |
2673 | /* "Invalid field in cdb" */ |
2674 | return 1; | |
b095518e JG |
2675 | } |
2676 | ||
1da177e4 LT |
2677 | /** |
2678 | * ata_get_xlat_func - check if SCSI to ATA translation is possible | |
2679 | * @dev: ATA device | |
2680 | * @cmd: SCSI command opcode to consider | |
2681 | * | |
2682 | * Look up the SCSI command given, and determine whether the | |
2683 | * SCSI command is to be translated or simulated. | |
2684 | * | |
2685 | * RETURNS: | |
2686 | * Pointer to translation function if possible, %NULL if not. | |
2687 | */ | |
2688 | ||
2689 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) | |
2690 | { | |
2691 | switch (cmd) { | |
2692 | case READ_6: | |
2693 | case READ_10: | |
2694 | case READ_16: | |
2695 | ||
2696 | case WRITE_6: | |
2697 | case WRITE_10: | |
2698 | case WRITE_16: | |
2699 | return ata_scsi_rw_xlat; | |
2700 | ||
2701 | case SYNCHRONIZE_CACHE: | |
2702 | if (ata_try_flush_cache(dev)) | |
2703 | return ata_scsi_flush_xlat; | |
2704 | break; | |
2705 | ||
2706 | case VERIFY: | |
2707 | case VERIFY_16: | |
2708 | return ata_scsi_verify_xlat; | |
b095518e JG |
2709 | |
2710 | case ATA_12: | |
2711 | case ATA_16: | |
2712 | return ata_scsi_pass_thru; | |
da61396d | 2713 | |
972dcafb DG |
2714 | case START_STOP: |
2715 | return ata_scsi_start_stop_xlat; | |
1da177e4 LT |
2716 | } |
2717 | ||
2718 | return NULL; | |
2719 | } | |
2720 | ||
2721 | /** | |
2722 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg | |
2723 | * @ap: ATA port to which the command was being sent | |
2724 | * @cmd: SCSI command to dump | |
2725 | * | |
2726 | * Prints the contents of a SCSI command via printk(). | |
2727 | */ | |
2728 | ||
2729 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, | |
2730 | struct scsi_cmnd *cmd) | |
2731 | { | |
2732 | #ifdef ATA_DEBUG | |
2733 | struct scsi_device *scsidev = cmd->device; | |
2734 | u8 *scsicmd = cmd->cmnd; | |
2735 | ||
2736 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", | |
2737 | ap->id, | |
2738 | scsidev->channel, scsidev->id, scsidev->lun, | |
2739 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], | |
2740 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], | |
2741 | scsicmd[8]); | |
2742 | #endif | |
2743 | } | |
2744 | ||
542b1444 | 2745 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, |
2115ea94 TH |
2746 | void (*done)(struct scsi_cmnd *), |
2747 | struct ata_device *dev) | |
eb3f0f9c | 2748 | { |
2115ea94 TH |
2749 | int rc = 0; |
2750 | ||
2e5704f6 TH |
2751 | if (unlikely(!scmd->cmd_len)) { |
2752 | ata_dev_printk(dev, KERN_WARNING, "WARNING: zero len CDB\n"); | |
2753 | scmd->result = DID_ERROR << 16; | |
2754 | done(scmd); | |
2755 | return 0; | |
2756 | } | |
2757 | ||
eb3f0f9c BK |
2758 | if (dev->class == ATA_DEV_ATA) { |
2759 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, | |
542b1444 | 2760 | scmd->cmnd[0]); |
eb3f0f9c BK |
2761 | |
2762 | if (xlat_func) | |
542b1444 | 2763 | rc = ata_scsi_translate(dev, scmd, done, xlat_func); |
eb3f0f9c | 2764 | else |
542b1444 | 2765 | ata_scsi_simulate(dev, scmd, done); |
eb3f0f9c | 2766 | } else |
542b1444 | 2767 | rc = ata_scsi_translate(dev, scmd, done, atapi_xlat); |
2115ea94 TH |
2768 | |
2769 | return rc; | |
eb3f0f9c BK |
2770 | } |
2771 | ||
1da177e4 LT |
2772 | /** |
2773 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device | |
2774 | * @cmd: SCSI command to be sent | |
2775 | * @done: Completion function, called when command is complete | |
2776 | * | |
2777 | * In some cases, this function translates SCSI commands into | |
2778 | * ATA taskfiles, and queues the taskfiles to be sent to | |
2779 | * hardware. In other cases, this function simulates a | |
2780 | * SCSI device by evaluating and responding to certain | |
2781 | * SCSI commands. This creates the overall effect of | |
2782 | * ATA and ATAPI devices appearing as SCSI devices. | |
2783 | * | |
2784 | * LOCKING: | |
cca3974e | 2785 | * Releases scsi-layer-held lock, and obtains host lock. |
1da177e4 LT |
2786 | * |
2787 | * RETURNS: | |
2115ea94 TH |
2788 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
2789 | * 0 otherwise. | |
1da177e4 | 2790 | */ |
1da177e4 LT |
2791 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
2792 | { | |
2793 | struct ata_port *ap; | |
2794 | struct ata_device *dev; | |
2795 | struct scsi_device *scsidev = cmd->device; | |
005a5a06 | 2796 | struct Scsi_Host *shost = scsidev->host; |
2115ea94 | 2797 | int rc = 0; |
1da177e4 | 2798 | |
35bb94b1 | 2799 | ap = ata_shost_to_port(shost); |
005a5a06 JG |
2800 | |
2801 | spin_unlock(shost->host_lock); | |
ba6a1308 | 2802 | spin_lock(ap->lock); |
1da177e4 LT |
2803 | |
2804 | ata_scsi_dump_cdb(ap, cmd); | |
2805 | ||
2806 | dev = ata_scsi_find_dev(ap, scsidev); | |
eb3f0f9c | 2807 | if (likely(dev)) |
2115ea94 | 2808 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
eb3f0f9c | 2809 | else { |
1da177e4 LT |
2810 | cmd->result = (DID_BAD_TARGET << 16); |
2811 | done(cmd); | |
1da177e4 LT |
2812 | } |
2813 | ||
ba6a1308 | 2814 | spin_unlock(ap->lock); |
005a5a06 | 2815 | spin_lock(shost->host_lock); |
2115ea94 | 2816 | return rc; |
1da177e4 LT |
2817 | } |
2818 | ||
2819 | /** | |
2820 | * ata_scsi_simulate - simulate SCSI command on ATA device | |
c893a3ae | 2821 | * @dev: the target device |
1da177e4 LT |
2822 | * @cmd: SCSI command being sent to device. |
2823 | * @done: SCSI command completion function. | |
2824 | * | |
2825 | * Interprets and directly executes a select list of SCSI commands | |
2826 | * that can be handled internally. | |
2827 | * | |
2828 | * LOCKING: | |
cca3974e | 2829 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
2830 | */ |
2831 | ||
3373efd8 | 2832 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
2833 | void (*done)(struct scsi_cmnd *)) |
2834 | { | |
2835 | struct ata_scsi_args args; | |
057ace5e | 2836 | const u8 *scsicmd = cmd->cmnd; |
1da177e4 | 2837 | |
9a3dccc4 TH |
2838 | args.dev = dev; |
2839 | args.id = dev->id; | |
1da177e4 LT |
2840 | args.cmd = cmd; |
2841 | args.done = done; | |
2842 | ||
2843 | switch(scsicmd[0]) { | |
2844 | /* no-op's, complete with success */ | |
2845 | case SYNCHRONIZE_CACHE: | |
2846 | case REZERO_UNIT: | |
2847 | case SEEK_6: | |
2848 | case SEEK_10: | |
2849 | case TEST_UNIT_READY: | |
2850 | case FORMAT_UNIT: /* FIXME: correct? */ | |
2851 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ | |
2852 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); | |
2853 | break; | |
2854 | ||
2855 | case INQUIRY: | |
2856 | if (scsicmd[1] & 2) /* is CmdDt set? */ | |
ae006510 | 2857 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2858 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
2859 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); | |
2860 | else if (scsicmd[2] == 0x00) | |
2861 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); | |
2862 | else if (scsicmd[2] == 0x80) | |
2863 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); | |
2864 | else if (scsicmd[2] == 0x83) | |
2865 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); | |
2866 | else | |
ae006510 | 2867 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2868 | break; |
2869 | ||
2870 | case MODE_SENSE: | |
2871 | case MODE_SENSE_10: | |
2872 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); | |
2873 | break; | |
2874 | ||
2875 | case MODE_SELECT: /* unconditionally return */ | |
2876 | case MODE_SELECT_10: /* bad-field-in-cdb */ | |
ae006510 | 2877 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2878 | break; |
2879 | ||
2880 | case READ_CAPACITY: | |
2881 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2882 | break; | |
2883 | ||
2884 | case SERVICE_ACTION_IN: | |
2885 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) | |
2886 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); | |
2887 | else | |
ae006510 | 2888 | ata_scsi_invalid_field(cmd, done); |
1da177e4 LT |
2889 | break; |
2890 | ||
2891 | case REPORT_LUNS: | |
2892 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); | |
2893 | break; | |
2894 | ||
b095518e | 2895 | /* mandatory commands we haven't implemented yet */ |
1da177e4 LT |
2896 | case REQUEST_SENSE: |
2897 | ||
2898 | /* all other commands */ | |
2899 | default: | |
ae006510 DG |
2900 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
2901 | /* "Invalid command operation code" */ | |
2902 | done(cmd); | |
1da177e4 LT |
2903 | break; |
2904 | } | |
2905 | } | |
2906 | ||
644dd0cc JG |
2907 | void ata_scsi_scan_host(struct ata_port *ap) |
2908 | { | |
2909 | unsigned int i; | |
2910 | ||
198e0fed | 2911 | if (ap->flags & ATA_FLAG_DISABLED) |
644dd0cc JG |
2912 | return; |
2913 | ||
3f19ee8c | 2914 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
3edebac4 TH |
2915 | struct ata_device *dev = &ap->device[i]; |
2916 | struct scsi_device *sdev; | |
2917 | ||
2918 | if (!ata_dev_enabled(dev) || dev->sdev) | |
2919 | continue; | |
3f19ee8c | 2920 | |
cca3974e | 2921 | sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL); |
3edebac4 TH |
2922 | if (!IS_ERR(sdev)) { |
2923 | dev->sdev = sdev; | |
2924 | scsi_device_put(sdev); | |
2925 | } | |
3f19ee8c | 2926 | } |
644dd0cc | 2927 | } |
0ea035a3 TH |
2928 | |
2929 | /** | |
2930 | * ata_scsi_offline_dev - offline attached SCSI device | |
2931 | * @dev: ATA device to offline attached SCSI device for | |
2932 | * | |
2933 | * This function is called from ata_eh_hotplug() and responsible | |
2934 | * for taking the SCSI device attached to @dev offline. This | |
cca3974e | 2935 | * function is called with host lock which protects dev->sdev |
0ea035a3 TH |
2936 | * against clearing. |
2937 | * | |
2938 | * LOCKING: | |
cca3974e | 2939 | * spin_lock_irqsave(host lock) |
0ea035a3 TH |
2940 | * |
2941 | * RETURNS: | |
2942 | * 1 if attached SCSI device exists, 0 otherwise. | |
2943 | */ | |
2944 | int ata_scsi_offline_dev(struct ata_device *dev) | |
2945 | { | |
2946 | if (dev->sdev) { | |
2947 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); | |
2948 | return 1; | |
2949 | } | |
2950 | return 0; | |
2951 | } | |
580b2102 TH |
2952 | |
2953 | /** | |
2954 | * ata_scsi_remove_dev - remove attached SCSI device | |
2955 | * @dev: ATA device to remove attached SCSI device for | |
2956 | * | |
2957 | * This function is called from ata_eh_scsi_hotplug() and | |
2958 | * responsible for removing the SCSI device attached to @dev. | |
2959 | * | |
2960 | * LOCKING: | |
2961 | * Kernel thread context (may sleep). | |
2962 | */ | |
2963 | static void ata_scsi_remove_dev(struct ata_device *dev) | |
2964 | { | |
2965 | struct ata_port *ap = dev->ap; | |
2966 | struct scsi_device *sdev; | |
2967 | unsigned long flags; | |
2968 | ||
2969 | /* Alas, we need to grab scan_mutex to ensure SCSI device | |
2970 | * state doesn't change underneath us and thus | |
2971 | * scsi_device_get() always succeeds. The mutex locking can | |
2972 | * be removed if there is __scsi_device_get() interface which | |
2973 | * increments reference counts regardless of device state. | |
2974 | */ | |
cca3974e | 2975 | mutex_lock(&ap->scsi_host->scan_mutex); |
ba6a1308 | 2976 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 2977 | |
cca3974e | 2978 | /* clearing dev->sdev is protected by host lock */ |
580b2102 TH |
2979 | sdev = dev->sdev; |
2980 | dev->sdev = NULL; | |
2981 | ||
2982 | if (sdev) { | |
2983 | /* If user initiated unplug races with us, sdev can go | |
cca3974e | 2984 | * away underneath us after the host lock and |
580b2102 TH |
2985 | * scan_mutex are released. Hold onto it. |
2986 | */ | |
2987 | if (scsi_device_get(sdev) == 0) { | |
2988 | /* The following ensures the attached sdev is | |
2989 | * offline on return from ata_scsi_offline_dev() | |
2990 | * regardless it wins or loses the race | |
2991 | * against this function. | |
2992 | */ | |
2993 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
2994 | } else { | |
2995 | WARN_ON(1); | |
2996 | sdev = NULL; | |
2997 | } | |
2998 | } | |
2999 | ||
ba6a1308 | 3000 | spin_unlock_irqrestore(ap->lock, flags); |
cca3974e | 3001 | mutex_unlock(&ap->scsi_host->scan_mutex); |
580b2102 TH |
3002 | |
3003 | if (sdev) { | |
3004 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", | |
3005 | sdev->sdev_gendev.bus_id); | |
3006 | ||
3007 | scsi_remove_device(sdev); | |
3008 | scsi_device_put(sdev); | |
3009 | } | |
3010 | } | |
3011 | ||
3012 | /** | |
3013 | * ata_scsi_hotplug - SCSI part of hotplug | |
65f27f38 | 3014 | * @work: Pointer to ATA port to perform SCSI hotplug on |
580b2102 TH |
3015 | * |
3016 | * Perform SCSI part of hotplug. It's executed from a separate | |
3017 | * workqueue after EH completes. This is necessary because SCSI | |
3018 | * hot plugging requires working EH and hot unplugging is | |
3019 | * synchronized with hot plugging with a mutex. | |
3020 | * | |
3021 | * LOCKING: | |
3022 | * Kernel thread context (may sleep). | |
3023 | */ | |
65f27f38 | 3024 | void ata_scsi_hotplug(struct work_struct *work) |
580b2102 | 3025 | { |
65f27f38 DH |
3026 | struct ata_port *ap = |
3027 | container_of(work, struct ata_port, hotplug_task.work); | |
580b2102 TH |
3028 | int i; |
3029 | ||
b51e9e5d | 3030 | if (ap->pflags & ATA_PFLAG_UNLOADING) { |
580b2102 TH |
3031 | DPRINTK("ENTER/EXIT - unloading\n"); |
3032 | return; | |
3033 | } | |
3034 | ||
3035 | DPRINTK("ENTER\n"); | |
3036 | ||
3037 | /* unplug detached devices */ | |
3038 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3039 | struct ata_device *dev = &ap->device[i]; | |
3040 | unsigned long flags; | |
3041 | ||
3042 | if (!(dev->flags & ATA_DFLAG_DETACHED)) | |
3043 | continue; | |
3044 | ||
ba6a1308 | 3045 | spin_lock_irqsave(ap->lock, flags); |
580b2102 | 3046 | dev->flags &= ~ATA_DFLAG_DETACHED; |
ba6a1308 | 3047 | spin_unlock_irqrestore(ap->lock, flags); |
580b2102 TH |
3048 | |
3049 | ata_scsi_remove_dev(dev); | |
3050 | } | |
3051 | ||
3052 | /* scan for new ones */ | |
3053 | ata_scsi_scan_host(ap); | |
3054 | ||
3055 | /* If we scanned while EH was in progress, scan would have | |
3056 | * failed silently. Requeue if there are enabled but | |
3057 | * unattached devices. | |
3058 | */ | |
3059 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
3060 | struct ata_device *dev = &ap->device[i]; | |
3061 | if (ata_dev_enabled(dev) && !dev->sdev) { | |
3062 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ); | |
3063 | break; | |
3064 | } | |
3065 | } | |
3066 | ||
3067 | DPRINTK("EXIT\n"); | |
3068 | } | |
83c47bcb TH |
3069 | |
3070 | /** | |
3071 | * ata_scsi_user_scan - indication for user-initiated bus scan | |
3072 | * @shost: SCSI host to scan | |
3073 | * @channel: Channel to scan | |
3074 | * @id: ID to scan | |
3075 | * @lun: LUN to scan | |
3076 | * | |
3077 | * This function is called when user explicitly requests bus | |
3078 | * scan. Set probe pending flag and invoke EH. | |
3079 | * | |
3080 | * LOCKING: | |
3081 | * SCSI layer (we don't care) | |
3082 | * | |
3083 | * RETURNS: | |
3084 | * Zero. | |
3085 | */ | |
3086 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, | |
3087 | unsigned int id, unsigned int lun) | |
3088 | { | |
3089 | struct ata_port *ap = ata_shost_to_port(shost); | |
3090 | unsigned long flags; | |
3091 | int rc = 0; | |
3092 | ||
3093 | if (!ap->ops->error_handler) | |
3094 | return -EOPNOTSUPP; | |
3095 | ||
3096 | if ((channel != SCAN_WILD_CARD && channel != 0) || | |
3097 | (lun != SCAN_WILD_CARD && lun != 0)) | |
3098 | return -EINVAL; | |
3099 | ||
ba6a1308 | 3100 | spin_lock_irqsave(ap->lock, flags); |
83c47bcb TH |
3101 | |
3102 | if (id == SCAN_WILD_CARD) { | |
3103 | ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; | |
3104 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
3105 | } else { | |
3106 | struct ata_device *dev = ata_find_dev(ap, id); | |
3107 | ||
3108 | if (dev) { | |
3109 | ap->eh_info.probe_mask |= 1 << dev->devno; | |
3110 | ap->eh_info.action |= ATA_EH_SOFTRESET; | |
28324304 | 3111 | ap->eh_info.flags |= ATA_EHI_RESUME_LINK; |
83c47bcb TH |
3112 | } else |
3113 | rc = -EINVAL; | |
3114 | } | |
3115 | ||
309afcb5 | 3116 | if (rc == 0) { |
83c47bcb | 3117 | ata_port_schedule_eh(ap); |
309afcb5 TH |
3118 | spin_unlock_irqrestore(ap->lock, flags); |
3119 | ata_port_wait_eh(ap); | |
3120 | } else | |
3121 | spin_unlock_irqrestore(ap->lock, flags); | |
83c47bcb TH |
3122 | |
3123 | return rc; | |
3124 | } | |
3057ac3c | 3125 | |
3126 | /** | |
d0171269 | 3127 | * ata_scsi_dev_rescan - initiate scsi_rescan_device() |
65f27f38 | 3128 | * @work: Pointer to ATA port to perform scsi_rescan_device() |
3057ac3c | 3129 | * |
d0171269 TH |
3130 | * After ATA pass thru (SAT) commands are executed successfully, |
3131 | * libata need to propagate the changes to SCSI layer. This | |
3132 | * function must be executed from ata_aux_wq such that sdev | |
3133 | * attach/detach don't race with rescan. | |
3057ac3c | 3134 | * |
d0171269 TH |
3135 | * LOCKING: |
3136 | * Kernel thread context (may sleep). | |
3057ac3c | 3137 | */ |
65f27f38 | 3138 | void ata_scsi_dev_rescan(struct work_struct *work) |
3057ac3c | 3139 | { |
65f27f38 DH |
3140 | struct ata_port *ap = |
3141 | container_of(work, struct ata_port, scsi_rescan_task); | |
f84e7e41 | 3142 | unsigned long flags; |
3057ac3c | 3143 | unsigned int i; |
3144 | ||
f84e7e41 TH |
3145 | spin_lock_irqsave(ap->lock, flags); |
3146 | ||
3057ac3c | 3147 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
f84e7e41 TH |
3148 | struct ata_device *dev = &ap->device[i]; |
3149 | struct scsi_device *sdev = dev->sdev; | |
3057ac3c | 3150 | |
f84e7e41 TH |
3151 | if (!ata_dev_enabled(dev) || !sdev) |
3152 | continue; | |
3153 | if (scsi_device_get(sdev)) | |
3154 | continue; | |
3155 | ||
3156 | spin_unlock_irqrestore(ap->lock, flags); | |
3157 | scsi_rescan_device(&(sdev->sdev_gendev)); | |
3158 | scsi_device_put(sdev); | |
3159 | spin_lock_irqsave(ap->lock, flags); | |
3057ac3c | 3160 | } |
f84e7e41 TH |
3161 | |
3162 | spin_unlock_irqrestore(ap->lock, flags); | |
3057ac3c | 3163 | } |
80289167 BK |
3164 | |
3165 | /** | |
3166 | * ata_sas_port_alloc - Allocate port for a SAS attached SATA device | |
4f931374 | 3167 | * @host: ATA host container for all SAS ports |
80289167 | 3168 | * @port_info: Information from low-level host driver |
cca3974e | 3169 | * @shost: SCSI host that the scsi device is attached to |
80289167 BK |
3170 | * |
3171 | * LOCKING: | |
3172 | * PCI/etc. bus probe sem. | |
3173 | * | |
3174 | * RETURNS: | |
3175 | * ata_port pointer on success / NULL on failure. | |
3176 | */ | |
3177 | ||
cca3974e | 3178 | struct ata_port *ata_sas_port_alloc(struct ata_host *host, |
80289167 | 3179 | struct ata_port_info *port_info, |
cca3974e | 3180 | struct Scsi_Host *shost) |
80289167 BK |
3181 | { |
3182 | struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
3183 | struct ata_probe_ent *ent; | |
3184 | ||
3185 | if (!ap) | |
3186 | return NULL; | |
3187 | ||
cca3974e | 3188 | ent = ata_probe_ent_alloc(host->dev, port_info); |
80289167 BK |
3189 | if (!ent) { |
3190 | kfree(ap); | |
3191 | return NULL; | |
3192 | } | |
3193 | ||
cca3974e JG |
3194 | ata_port_init(ap, host, ent, 0); |
3195 | ap->lock = shost->host_lock; | |
80289167 BK |
3196 | kfree(ent); |
3197 | return ap; | |
3198 | } | |
3199 | EXPORT_SYMBOL_GPL(ata_sas_port_alloc); | |
3200 | ||
3201 | /** | |
3202 | * ata_sas_port_start - Set port up for dma. | |
3203 | * @ap: Port to initialize | |
3204 | * | |
3205 | * Called just after data structures for each port are | |
3206 | * initialized. Allocates DMA pad. | |
3207 | * | |
3208 | * May be used as the port_start() entry in ata_port_operations. | |
3209 | * | |
3210 | * LOCKING: | |
3211 | * Inherited from caller. | |
3212 | */ | |
3213 | int ata_sas_port_start(struct ata_port *ap) | |
3214 | { | |
3215 | return ata_pad_alloc(ap, ap->dev); | |
3216 | } | |
3217 | EXPORT_SYMBOL_GPL(ata_sas_port_start); | |
3218 | ||
3219 | /** | |
3220 | * ata_port_stop - Undo ata_sas_port_start() | |
3221 | * @ap: Port to shut down | |
3222 | * | |
3223 | * Frees the DMA pad. | |
3224 | * | |
3225 | * May be used as the port_stop() entry in ata_port_operations. | |
3226 | * | |
3227 | * LOCKING: | |
3228 | * Inherited from caller. | |
3229 | */ | |
3230 | ||
3231 | void ata_sas_port_stop(struct ata_port *ap) | |
3232 | { | |
3233 | ata_pad_free(ap, ap->dev); | |
3234 | } | |
3235 | EXPORT_SYMBOL_GPL(ata_sas_port_stop); | |
3236 | ||
3237 | /** | |
3238 | * ata_sas_port_init - Initialize a SATA device | |
3239 | * @ap: SATA port to initialize | |
3240 | * | |
3241 | * LOCKING: | |
3242 | * PCI/etc. bus probe sem. | |
3243 | * | |
3244 | * RETURNS: | |
3245 | * Zero on success, non-zero on error. | |
3246 | */ | |
3247 | ||
3248 | int ata_sas_port_init(struct ata_port *ap) | |
3249 | { | |
3250 | int rc = ap->ops->port_start(ap); | |
3251 | ||
3252 | if (!rc) | |
3253 | rc = ata_bus_probe(ap); | |
3254 | ||
3255 | return rc; | |
3256 | } | |
3257 | EXPORT_SYMBOL_GPL(ata_sas_port_init); | |
3258 | ||
3259 | /** | |
3260 | * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc | |
3261 | * @ap: SATA port to destroy | |
3262 | * | |
3263 | */ | |
3264 | ||
3265 | void ata_sas_port_destroy(struct ata_port *ap) | |
3266 | { | |
3267 | ap->ops->port_stop(ap); | |
3268 | kfree(ap); | |
3269 | } | |
3270 | EXPORT_SYMBOL_GPL(ata_sas_port_destroy); | |
3271 | ||
3272 | /** | |
3273 | * ata_sas_slave_configure - Default slave_config routine for libata devices | |
3274 | * @sdev: SCSI device to configure | |
3275 | * @ap: ATA port to which SCSI device is attached | |
3276 | * | |
3277 | * RETURNS: | |
3278 | * Zero. | |
3279 | */ | |
3280 | ||
3281 | int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) | |
3282 | { | |
3283 | ata_scsi_sdev_config(sdev); | |
3284 | ata_scsi_dev_config(sdev, ap->device); | |
3285 | return 0; | |
3286 | } | |
3287 | EXPORT_SYMBOL_GPL(ata_sas_slave_configure); | |
3288 | ||
3289 | /** | |
3290 | * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device | |
3291 | * @cmd: SCSI command to be sent | |
3292 | * @done: Completion function, called when command is complete | |
3293 | * @ap: ATA port to which the command is being sent | |
3294 | * | |
3295 | * RETURNS: | |
08475a19 BK |
3296 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
3297 | * 0 otherwise. | |
80289167 BK |
3298 | */ |
3299 | ||
3300 | int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
3301 | struct ata_port *ap) | |
3302 | { | |
08475a19 BK |
3303 | int rc = 0; |
3304 | ||
80289167 BK |
3305 | ata_scsi_dump_cdb(ap, cmd); |
3306 | ||
3307 | if (likely(ata_scsi_dev_enabled(ap->device))) | |
08475a19 | 3308 | rc = __ata_scsi_queuecmd(cmd, done, ap->device); |
80289167 BK |
3309 | else { |
3310 | cmd->result = (DID_BAD_TARGET << 16); | |
3311 | done(cmd); | |
3312 | } | |
08475a19 | 3313 | return rc; |
80289167 BK |
3314 | } |
3315 | EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |