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Complete the renaming to TuxOnIce with function names, vars etc.
[linux-2.6/suspend2-head.git] / drivers / ata / libata-scsi.c
blobcfde22da07ac9aa3537e22b88935c4f56bf57e70
1 /*
2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
34 */
35
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
49
50 #include "libata.h"
51
52 #define SECTOR_SIZE 512
53
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
55
56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
62
63
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
72
73
74 static const u8 def_rw_recovery_mpage[] = {
75 RW_RECOVERY_MPAGE,
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
80 0, 0, 0, 0,
81 0, /* write retry count */
82 0, 0, 0
83 };
84
85 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
86 CACHE_MPAGE,
87 CACHE_MPAGE_LEN - 2,
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
91 0, 0, 0, 0, 0, 0, 0
92 };
93
94 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE,
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
101 };
102
103 /*
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
106 */
107 static struct scsi_transport_template ata_scsi_transport_template = {
108 .eh_strategy_handler = ata_scsi_error,
109 .eh_timed_out = ata_scsi_timed_out,
110 .user_scan = ata_scsi_user_scan,
111 };
112
113
114 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
116 {
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
119 done(cmd);
120 }
121
122 /**
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
128 *
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
133 *
134 * LOCKING:
135 * Defined by the SCSI layer. We don't really care.
136 *
137 * RETURNS:
138 * Zero.
139 */
140 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
142 {
143 geom[0] = 255;
144 geom[1] = 63;
145 sector_div(capacity, 255*63);
146 geom[2] = capacity;
147
148 return 0;
149 }
150
151 /**
152 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
153 * @sdev: SCSI device to get identify data for
154 * @arg: User buffer area for identify data
155 *
156 * LOCKING:
157 * Defined by the SCSI layer. We don't really care.
158 *
159 * RETURNS:
160 * Zero on success, negative errno on error.
161 */
162 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
163 {
164 struct ata_port *ap = ata_shost_to_port(sdev->host);
165 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
166 u16 __user *dst = arg;
167 char buf[40];
168
169 if (!dev)
170 return -ENOMSG;
171
172 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
173 return -EFAULT;
174
175 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
176 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
177 return -EFAULT;
178
179 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
180 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
181 return -EFAULT;
182
183 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
184 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
185 return -EFAULT;
186
187 return 0;
188 }
189
190 /**
191 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
192 * @scsidev: Device to which we are issuing command
193 * @arg: User provided data for issuing command
194 *
195 * LOCKING:
196 * Defined by the SCSI layer. We don't really care.
197 *
198 * RETURNS:
199 * Zero on success, negative errno on error.
200 */
201 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
202 {
203 int rc = 0;
204 u8 scsi_cmd[MAX_COMMAND_SIZE];
205 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
206 int argsize = 0;
207 enum dma_data_direction data_dir;
208 int cmd_result;
209
210 if (arg == NULL)
211 return -EINVAL;
212
213 if (copy_from_user(args, arg, sizeof(args)))
214 return -EFAULT;
215
216 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
217 if (!sensebuf)
218 return -ENOMEM;
219
220 memset(scsi_cmd, 0, sizeof(scsi_cmd));
221
222 if (args[3]) {
223 argsize = SECTOR_SIZE * args[3];
224 argbuf = kmalloc(argsize, GFP_KERNEL);
225 if (argbuf == NULL) {
226 rc = -ENOMEM;
227 goto error;
228 }
229
230 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
231 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
232 block count in sector count field */
233 data_dir = DMA_FROM_DEVICE;
234 } else {
235 scsi_cmd[1] = (3 << 1); /* Non-data */
236 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
237 data_dir = DMA_NONE;
238 }
239
240 scsi_cmd[0] = ATA_16;
241
242 scsi_cmd[4] = args[2];
243 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
244 scsi_cmd[6] = args[3];
245 scsi_cmd[8] = args[1];
246 scsi_cmd[10] = 0x4f;
247 scsi_cmd[12] = 0xc2;
248 } else {
249 scsi_cmd[6] = args[1];
250 }
251 scsi_cmd[14] = args[0];
252
253 /* Good values for timeout and retries? Values below
254 from scsi_ioctl_send_command() for default case... */
255 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
256 sensebuf, (10*HZ), 5, 0);
257
258 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
259 u8 *desc = sensebuf + 8;
260 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
261
262 /* If we set cc then ATA pass-through will cause a
263 * check condition even if no error. Filter that. */
264 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
265 struct scsi_sense_hdr sshdr;
266 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
267 &sshdr);
268 if (sshdr.sense_key==0 &&
269 sshdr.asc==0 && sshdr.ascq==0)
270 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
271 }
272
273 /* Send userspace a few ATA registers (same as drivers/ide) */
274 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
275 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
276 args[0] = desc[13]; /* status */
277 args[1] = desc[3]; /* error */
278 args[2] = desc[5]; /* sector count (0:7) */
279 if (copy_to_user(arg, args, sizeof(args)))
280 rc = -EFAULT;
281 }
282 }
283
284
285 if (cmd_result) {
286 rc = -EIO;
287 goto error;
288 }
289
290 if ((argbuf)
291 && copy_to_user(arg + sizeof(args), argbuf, argsize))
292 rc = -EFAULT;
293 error:
294 kfree(sensebuf);
295 kfree(argbuf);
296 return rc;
297 }
298
299 /**
300 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
301 * @scsidev: Device to which we are issuing command
302 * @arg: User provided data for issuing command
303 *
304 * LOCKING:
305 * Defined by the SCSI layer. We don't really care.
306 *
307 * RETURNS:
308 * Zero on success, negative errno on error.
309 */
310 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
311 {
312 int rc = 0;
313 u8 scsi_cmd[MAX_COMMAND_SIZE];
314 u8 args[7], *sensebuf = NULL;
315 int cmd_result;
316
317 if (arg == NULL)
318 return -EINVAL;
319
320 if (copy_from_user(args, arg, sizeof(args)))
321 return -EFAULT;
322
323 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
324 if (!sensebuf)
325 return -ENOMEM;
326
327 memset(scsi_cmd, 0, sizeof(scsi_cmd));
328 scsi_cmd[0] = ATA_16;
329 scsi_cmd[1] = (3 << 1); /* Non-data */
330 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
331 scsi_cmd[4] = args[1];
332 scsi_cmd[6] = args[2];
333 scsi_cmd[8] = args[3];
334 scsi_cmd[10] = args[4];
335 scsi_cmd[12] = args[5];
336 scsi_cmd[13] = args[6] & 0x4f;
337 scsi_cmd[14] = args[0];
338
339 /* Good values for timeout and retries? Values below
340 from scsi_ioctl_send_command() for default case... */
341 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
342 sensebuf, (10*HZ), 5, 0);
343
344 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
345 u8 *desc = sensebuf + 8;
346 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
347
348 /* If we set cc then ATA pass-through will cause a
349 * check condition even if no error. Filter that. */
350 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
351 struct scsi_sense_hdr sshdr;
352 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
353 &sshdr);
354 if (sshdr.sense_key==0 &&
355 sshdr.asc==0 && sshdr.ascq==0)
356 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
357 }
358
359 /* Send userspace ATA registers */
360 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
361 desc[0] == 0x09) {/* code is "ATA Descriptor" */
362 args[0] = desc[13]; /* status */
363 args[1] = desc[3]; /* error */
364 args[2] = desc[5]; /* sector count (0:7) */
365 args[3] = desc[7]; /* lbal */
366 args[4] = desc[9]; /* lbam */
367 args[5] = desc[11]; /* lbah */
368 args[6] = desc[12]; /* select */
369 if (copy_to_user(arg, args, sizeof(args)))
370 rc = -EFAULT;
371 }
372 }
373
374 if (cmd_result) {
375 rc = -EIO;
376 goto error;
377 }
378
379 error:
380 kfree(sensebuf);
381 return rc;
382 }
383
384 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
385 {
386 int val = -EINVAL, rc = -EINVAL;
387
388 switch (cmd) {
389 case ATA_IOC_GET_IO32:
390 val = 0;
391 if (copy_to_user(arg, &val, 1))
392 return -EFAULT;
393 return 0;
394
395 case ATA_IOC_SET_IO32:
396 val = (unsigned long) arg;
397 if (val != 0)
398 return -EINVAL;
399 return 0;
400
401 case HDIO_GET_IDENTITY:
402 return ata_get_identity(scsidev, arg);
403
404 case HDIO_DRIVE_CMD:
405 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
406 return -EACCES;
407 return ata_cmd_ioctl(scsidev, arg);
408
409 case HDIO_DRIVE_TASK:
410 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
411 return -EACCES;
412 return ata_task_ioctl(scsidev, arg);
413
414 default:
415 rc = -ENOTTY;
416 break;
417 }
418
419 return rc;
420 }
421
422 /**
423 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
424 * @dev: ATA device to which the new command is attached
425 * @cmd: SCSI command that originated this ATA command
426 * @done: SCSI command completion function
427 *
428 * Obtain a reference to an unused ata_queued_cmd structure,
429 * which is the basic libata structure representing a single
430 * ATA command sent to the hardware.
431 *
432 * If a command was available, fill in the SCSI-specific
433 * portions of the structure with information on the
434 * current command.
435 *
436 * LOCKING:
437 * spin_lock_irqsave(host lock)
438 *
439 * RETURNS:
440 * Command allocated, or %NULL if none available.
441 */
442 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
443 struct scsi_cmnd *cmd,
444 void (*done)(struct scsi_cmnd *))
445 {
446 struct ata_queued_cmd *qc;
447
448 qc = ata_qc_new_init(dev);
449 if (qc) {
450 qc->scsicmd = cmd;
451 qc->scsidone = done;
452
453 if (cmd->use_sg) {
454 qc->__sg = (struct scatterlist *) cmd->request_buffer;
455 qc->n_elem = cmd->use_sg;
456 } else if (cmd->request_bufflen) {
457 qc->__sg = &qc->sgent;
458 qc->n_elem = 1;
459 }
460 } else {
461 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
462 done(cmd);
463 }
464
465 return qc;
466 }
467
468 /**
469 * ata_dump_status - user friendly display of error info
470 * @id: id of the port in question
471 * @tf: ptr to filled out taskfile
472 *
473 * Decode and dump the ATA error/status registers for the user so
474 * that they have some idea what really happened at the non
475 * make-believe layer.
476 *
477 * LOCKING:
478 * inherited from caller
479 */
480 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
481 {
482 u8 stat = tf->command, err = tf->feature;
483
484 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
485 if (stat & ATA_BUSY) {
486 printk("Busy }\n"); /* Data is not valid in this case */
487 } else {
488 if (stat & 0x40) printk("DriveReady ");
489 if (stat & 0x20) printk("DeviceFault ");
490 if (stat & 0x10) printk("SeekComplete ");
491 if (stat & 0x08) printk("DataRequest ");
492 if (stat & 0x04) printk("CorrectedError ");
493 if (stat & 0x02) printk("Index ");
494 if (stat & 0x01) printk("Error ");
495 printk("}\n");
496
497 if (err) {
498 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
499 if (err & 0x04) printk("DriveStatusError ");
500 if (err & 0x80) {
501 if (err & 0x04) printk("BadCRC ");
502 else printk("Sector ");
503 }
504 if (err & 0x40) printk("UncorrectableError ");
505 if (err & 0x10) printk("SectorIdNotFound ");
506 if (err & 0x02) printk("TrackZeroNotFound ");
507 if (err & 0x01) printk("AddrMarkNotFound ");
508 printk("}\n");
509 }
510 }
511 }
512
513 /**
514 * ata_to_sense_error - convert ATA error to SCSI error
515 * @id: ATA device number
516 * @drv_stat: value contained in ATA status register
517 * @drv_err: value contained in ATA error register
518 * @sk: the sense key we'll fill out
519 * @asc: the additional sense code we'll fill out
520 * @ascq: the additional sense code qualifier we'll fill out
521 * @verbose: be verbose
522 *
523 * Converts an ATA error into a SCSI error. Fill out pointers to
524 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
525 * format sense blocks.
526 *
527 * LOCKING:
528 * spin_lock_irqsave(host lock)
529 */
530 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
531 u8 *asc, u8 *ascq, int verbose)
532 {
533 int i;
534
535 /* Based on the 3ware driver translation table */
536 static const unsigned char sense_table[][4] = {
537 /* BBD|ECC|ID|MAR */
538 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
539 /* BBD|ECC|ID */
540 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
541 /* ECC|MC|MARK */
542 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
543 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
544 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
545 /* MC|ID|ABRT|TRK0|MARK */
546 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
547 /* MCR|MARK */
548 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
549 /* Bad address mark */
550 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
551 /* TRK0 */
552 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
553 /* Abort & !ICRC */
554 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
555 /* Media change request */
556 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
557 /* SRV */
558 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
559 /* Media change */
560 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
561 /* ECC */
562 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
563 /* BBD - block marked bad */
564 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
565 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
566 };
567 static const unsigned char stat_table[][4] = {
568 /* Must be first because BUSY means no other bits valid */
569 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
570 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
571 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
572 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
573 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
574 };
575
576 /*
577 * Is this an error we can process/parse
578 */
579 if (drv_stat & ATA_BUSY) {
580 drv_err = 0; /* Ignore the err bits, they're invalid */
581 }
582
583 if (drv_err) {
584 /* Look for drv_err */
585 for (i = 0; sense_table[i][0] != 0xFF; i++) {
586 /* Look for best matches first */
587 if ((sense_table[i][0] & drv_err) ==
588 sense_table[i][0]) {
589 *sk = sense_table[i][1];
590 *asc = sense_table[i][2];
591 *ascq = sense_table[i][3];
592 goto translate_done;
593 }
594 }
595 /* No immediate match */
596 if (verbose)
597 printk(KERN_WARNING "ata%u: no sense translation for "
598 "error 0x%02x\n", id, drv_err);
599 }
600
601 /* Fall back to interpreting status bits */
602 for (i = 0; stat_table[i][0] != 0xFF; i++) {
603 if (stat_table[i][0] & drv_stat) {
604 *sk = stat_table[i][1];
605 *asc = stat_table[i][2];
606 *ascq = stat_table[i][3];
607 goto translate_done;
608 }
609 }
610 /* No error? Undecoded? */
611 if (verbose)
612 printk(KERN_WARNING "ata%u: no sense translation for "
613 "status: 0x%02x\n", id, drv_stat);
614
615 /* We need a sensible error return here, which is tricky, and one
616 that won't cause people to do things like return a disk wrongly */
617 *sk = ABORTED_COMMAND;
618 *asc = 0x00;
619 *ascq = 0x00;
620
621 translate_done:
622 if (verbose)
623 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
624 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
625 id, drv_stat, drv_err, *sk, *asc, *ascq);
626 return;
627 }
628
629 /*
630 * ata_gen_passthru_sense - Generate check condition sense block.
631 * @qc: Command that completed.
632 *
633 * This function is specific to the ATA descriptor format sense
634 * block specified for the ATA pass through commands. Regardless
635 * of whether the command errored or not, return a sense
636 * block. Copy all controller registers into the sense
637 * block. Clear sense key, ASC & ASCQ if there is no error.
638 *
639 * LOCKING:
640 * None.
641 */
642 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
643 {
644 struct scsi_cmnd *cmd = qc->scsicmd;
645 struct ata_taskfile *tf = &qc->result_tf;
646 unsigned char *sb = cmd->sense_buffer;
647 unsigned char *desc = sb + 8;
648 int verbose = qc->ap->ops->error_handler == NULL;
649
650 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
651
652 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
653
654 /*
655 * Use ata_to_sense_error() to map status register bits
656 * onto sense key, asc & ascq.
657 */
658 if (qc->err_mask ||
659 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
660 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
661 &sb[1], &sb[2], &sb[3], verbose);
662 sb[1] &= 0x0f;
663 }
664
665 /*
666 * Sense data is current and format is descriptor.
667 */
668 sb[0] = 0x72;
669
670 desc[0] = 0x09;
671
672 /* set length of additional sense data */
673 sb[7] = 14;
674 desc[1] = 12;
675
676 /*
677 * Copy registers into sense buffer.
678 */
679 desc[2] = 0x00;
680 desc[3] = tf->feature; /* == error reg */
681 desc[5] = tf->nsect;
682 desc[7] = tf->lbal;
683 desc[9] = tf->lbam;
684 desc[11] = tf->lbah;
685 desc[12] = tf->device;
686 desc[13] = tf->command; /* == status reg */
687
688 /*
689 * Fill in Extend bit, and the high order bytes
690 * if applicable.
691 */
692 if (tf->flags & ATA_TFLAG_LBA48) {
693 desc[2] |= 0x01;
694 desc[4] = tf->hob_nsect;
695 desc[6] = tf->hob_lbal;
696 desc[8] = tf->hob_lbam;
697 desc[10] = tf->hob_lbah;
698 }
699 }
700
701 /**
702 * ata_gen_ata_sense - generate a SCSI fixed sense block
703 * @qc: Command that we are erroring out
704 *
705 * Generate sense block for a failed ATA command @qc. Descriptor
706 * format is used to accomodate LBA48 block address.
707 *
708 * LOCKING:
709 * None.
710 */
711 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
712 {
713 struct ata_device *dev = qc->dev;
714 struct scsi_cmnd *cmd = qc->scsicmd;
715 struct ata_taskfile *tf = &qc->result_tf;
716 unsigned char *sb = cmd->sense_buffer;
717 unsigned char *desc = sb + 8;
718 int verbose = qc->ap->ops->error_handler == NULL;
719 u64 block;
720
721 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
722
723 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
724
725 /* sense data is current and format is descriptor */
726 sb[0] = 0x72;
727
728 /* Use ata_to_sense_error() to map status register bits
729 * onto sense key, asc & ascq.
730 */
731 if (qc->err_mask ||
732 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
733 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
734 &sb[1], &sb[2], &sb[3], verbose);
735 sb[1] &= 0x0f;
736 }
737
738 block = ata_tf_read_block(&qc->result_tf, dev);
739
740 /* information sense data descriptor */
741 sb[7] = 12;
742 desc[0] = 0x00;
743 desc[1] = 10;
744
745 desc[2] |= 0x80; /* valid */
746 desc[6] = block >> 40;
747 desc[7] = block >> 32;
748 desc[8] = block >> 24;
749 desc[9] = block >> 16;
750 desc[10] = block >> 8;
751 desc[11] = block;
752 }
753
754 static void ata_scsi_sdev_config(struct scsi_device *sdev)
755 {
756 sdev->use_10_for_rw = 1;
757 sdev->use_10_for_ms = 1;
758 }
759
760 static void ata_scsi_dev_config(struct scsi_device *sdev,
761 struct ata_device *dev)
762 {
763 /* configure max sectors */
764 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
765
766 /* SATA DMA transfers must be multiples of 4 byte, so
767 * we need to pad ATAPI transfers using an extra sg.
768 * Decrement max hw segments accordingly.
769 */
770 if (dev->class == ATA_DEV_ATAPI) {
771 request_queue_t *q = sdev->request_queue;
772 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
773 }
774
775 if (dev->flags & ATA_DFLAG_NCQ) {
776 int depth;
777
778 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
779 depth = min(ATA_MAX_QUEUE - 1, depth);
780 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
781 }
782 }
783
784 /**
785 * ata_scsi_slave_config - Set SCSI device attributes
786 * @sdev: SCSI device to examine
787 *
788 * This is called before we actually start reading
789 * and writing to the device, to configure certain
790 * SCSI mid-layer behaviors.
791 *
792 * LOCKING:
793 * Defined by SCSI layer. We don't really care.
794 */
795
796 int ata_scsi_slave_config(struct scsi_device *sdev)
797 {
798 struct ata_port *ap = ata_shost_to_port(sdev->host);
799 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
800
801 ata_scsi_sdev_config(sdev);
802
803 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
804
805 sdev->manage_start_stop = 1;
806
807 if (dev)
808 ata_scsi_dev_config(sdev, dev);
809
810 return 0; /* scsi layer doesn't check return value, sigh */
811 }
812
813 /**
814 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
815 * @sdev: SCSI device to be destroyed
816 *
817 * @sdev is about to be destroyed for hot/warm unplugging. If
818 * this unplugging was initiated by libata as indicated by NULL
819 * dev->sdev, this function doesn't have to do anything.
820 * Otherwise, SCSI layer initiated warm-unplug is in progress.
821 * Clear dev->sdev, schedule the device for ATA detach and invoke
822 * EH.
823 *
824 * LOCKING:
825 * Defined by SCSI layer. We don't really care.
826 */
827 void ata_scsi_slave_destroy(struct scsi_device *sdev)
828 {
829 struct ata_port *ap = ata_shost_to_port(sdev->host);
830 unsigned long flags;
831 struct ata_device *dev;
832
833 if (!ap->ops->error_handler)
834 return;
835
836 spin_lock_irqsave(ap->lock, flags);
837 dev = __ata_scsi_find_dev(ap, sdev);
838 if (dev && dev->sdev) {
839 /* SCSI device already in CANCEL state, no need to offline it */
840 dev->sdev = NULL;
841 dev->flags |= ATA_DFLAG_DETACH;
842 ata_port_schedule_eh(ap);
843 }
844 spin_unlock_irqrestore(ap->lock, flags);
845 }
846
847 /**
848 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
849 * @sdev: SCSI device to configure queue depth for
850 * @queue_depth: new queue depth
851 *
852 * This is libata standard hostt->change_queue_depth callback.
853 * SCSI will call into this callback when user tries to set queue
854 * depth via sysfs.
855 *
856 * LOCKING:
857 * SCSI layer (we don't care)
858 *
859 * RETURNS:
860 * Newly configured queue depth.
861 */
862 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
863 {
864 struct ata_port *ap = ata_shost_to_port(sdev->host);
865 struct ata_device *dev;
866 unsigned long flags;
867
868 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
869 return sdev->queue_depth;
870
871 dev = ata_scsi_find_dev(ap, sdev);
872 if (!dev || !ata_dev_enabled(dev))
873 return sdev->queue_depth;
874
875 /* NCQ enabled? */
876 spin_lock_irqsave(ap->lock, flags);
877 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
878 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
879 dev->flags |= ATA_DFLAG_NCQ_OFF;
880 queue_depth = 1;
881 }
882 spin_unlock_irqrestore(ap->lock, flags);
883
884 /* limit and apply queue depth */
885 queue_depth = min(queue_depth, sdev->host->can_queue);
886 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
887 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
888
889 if (sdev->queue_depth == queue_depth)
890 return -EINVAL;
891
892 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
893 return queue_depth;
894 }
895
896 /* XXX: for spindown warning */
897 static void ata_delayed_done_timerfn(unsigned long arg)
898 {
899 struct scsi_cmnd *scmd = (void *)arg;
900
901 scmd->scsi_done(scmd);
902 }
903
904 /* XXX: for spindown warning */
905 static void ata_delayed_done(struct scsi_cmnd *scmd)
906 {
907 static struct timer_list timer;
908
909 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
910 mod_timer(&timer, jiffies + 5 * HZ);
911 }
912
913 /**
914 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
915 * @qc: Storage for translated ATA taskfile
916 *
917 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
918 * (to start). Perhaps these commands should be preceded by
919 * CHECK POWER MODE to see what power mode the device is already in.
920 * [See SAT revision 5 at www.t10.org]
921 *
922 * LOCKING:
923 * spin_lock_irqsave(host lock)
924 *
925 * RETURNS:
926 * Zero on success, non-zero on error.
927 */
928 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
929 {
930 struct scsi_cmnd *scmd = qc->scsicmd;
931 struct ata_taskfile *tf = &qc->tf;
932 const u8 *cdb = scmd->cmnd;
933
934 if (scmd->cmd_len < 5)
935 goto invalid_fld;
936
937 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
938 tf->protocol = ATA_PROT_NODATA;
939 if (cdb[1] & 0x1) {
940 ; /* ignore IMMED bit, violates sat-r05 */
941 }
942 if (cdb[4] & 0x2)
943 goto invalid_fld; /* LOEJ bit set not supported */
944 if (((cdb[4] >> 4) & 0xf) != 0)
945 goto invalid_fld; /* power conditions not supported */
946 if (cdb[4] & 0x1) {
947 tf->nsect = 1; /* 1 sector, lba=0 */
948
949 if (qc->dev->flags & ATA_DFLAG_LBA) {
950 tf->flags |= ATA_TFLAG_LBA;
951
952 tf->lbah = 0x0;
953 tf->lbam = 0x0;
954 tf->lbal = 0x0;
955 tf->device |= ATA_LBA;
956 } else {
957 /* CHS */
958 tf->lbal = 0x1; /* sect */
959 tf->lbam = 0x0; /* cyl low */
960 tf->lbah = 0x0; /* cyl high */
961 }
962
963 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
964 } else {
965 /* XXX: This is for backward compatibility, will be
966 * removed. Read Documentation/feature-removal-schedule.txt
967 * for more info.
968 */
969 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
970 (system_state == SYSTEM_HALT ||
971 system_state == SYSTEM_POWER_OFF)) {
972 static unsigned long warned = 0;
973
974 if (!test_and_set_bit(0, &warned)) {
975 ata_dev_printk(qc->dev, KERN_WARNING,
976 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
977 "UPDATE SHUTDOWN UTILITY\n");
978 ata_dev_printk(qc->dev, KERN_WARNING,
979 "For more info, visit "
980 "http://linux-ata.org/shutdown.html\n");
981
982 /* ->scsi_done is not used, use it for
983 * delayed completion.
984 */
985 scmd->scsi_done = qc->scsidone;
986 qc->scsidone = ata_delayed_done;
987 }
988 scmd->result = SAM_STAT_GOOD;
989 return 1;
990 }
991
992 /* Issue ATA STANDBY IMMEDIATE command */
993 tf->command = ATA_CMD_STANDBYNOW1;
994 }
995
996 /*
997 * Standby and Idle condition timers could be implemented but that
998 * would require libata to implement the Power condition mode page
999 * and allow the user to change it. Changing mode pages requires
1000 * MODE SELECT to be implemented.
1001 */
1002
1003 return 0;
1004
1005 invalid_fld:
1006 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1007 /* "Invalid field in cbd" */
1008 return 1;
1009 }
1010
1011
1012 /**
1013 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1014 * @qc: Storage for translated ATA taskfile
1015 *
1016 * Sets up an ATA taskfile to issue FLUSH CACHE or
1017 * FLUSH CACHE EXT.
1018 *
1019 * LOCKING:
1020 * spin_lock_irqsave(host lock)
1021 *
1022 * RETURNS:
1023 * Zero on success, non-zero on error.
1024 */
1025 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1026 {
1027 struct ata_taskfile *tf = &qc->tf;
1028
1029 tf->flags |= ATA_TFLAG_DEVICE;
1030 tf->protocol = ATA_PROT_NODATA;
1031
1032 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1033 tf->command = ATA_CMD_FLUSH_EXT;
1034 else
1035 tf->command = ATA_CMD_FLUSH;
1036
1037 return 0;
1038 }
1039
1040 /**
1041 * scsi_6_lba_len - Get LBA and transfer length
1042 * @cdb: SCSI command to translate
1043 *
1044 * Calculate LBA and transfer length for 6-byte commands.
1045 *
1046 * RETURNS:
1047 * @plba: the LBA
1048 * @plen: the transfer length
1049 */
1050 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1051 {
1052 u64 lba = 0;
1053 u32 len;
1054
1055 VPRINTK("six-byte command\n");
1056
1057 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1058 lba |= ((u64)cdb[2]) << 8;
1059 lba |= ((u64)cdb[3]);
1060
1061 len = cdb[4];
1062
1063 *plba = lba;
1064 *plen = len;
1065 }
1066
1067 /**
1068 * scsi_10_lba_len - Get LBA and transfer length
1069 * @cdb: SCSI command to translate
1070 *
1071 * Calculate LBA and transfer length for 10-byte commands.
1072 *
1073 * RETURNS:
1074 * @plba: the LBA
1075 * @plen: the transfer length
1076 */
1077 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1078 {
1079 u64 lba = 0;
1080 u32 len = 0;
1081
1082 VPRINTK("ten-byte command\n");
1083
1084 lba |= ((u64)cdb[2]) << 24;
1085 lba |= ((u64)cdb[3]) << 16;
1086 lba |= ((u64)cdb[4]) << 8;
1087 lba |= ((u64)cdb[5]);
1088
1089 len |= ((u32)cdb[7]) << 8;
1090 len |= ((u32)cdb[8]);
1091
1092 *plba = lba;
1093 *plen = len;
1094 }
1095
1096 /**
1097 * scsi_16_lba_len - Get LBA and transfer length
1098 * @cdb: SCSI command to translate
1099 *
1100 * Calculate LBA and transfer length for 16-byte commands.
1101 *
1102 * RETURNS:
1103 * @plba: the LBA
1104 * @plen: the transfer length
1105 */
1106 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1107 {
1108 u64 lba = 0;
1109 u32 len = 0;
1110
1111 VPRINTK("sixteen-byte command\n");
1112
1113 lba |= ((u64)cdb[2]) << 56;
1114 lba |= ((u64)cdb[3]) << 48;
1115 lba |= ((u64)cdb[4]) << 40;
1116 lba |= ((u64)cdb[5]) << 32;
1117 lba |= ((u64)cdb[6]) << 24;
1118 lba |= ((u64)cdb[7]) << 16;
1119 lba |= ((u64)cdb[8]) << 8;
1120 lba |= ((u64)cdb[9]);
1121
1122 len |= ((u32)cdb[10]) << 24;
1123 len |= ((u32)cdb[11]) << 16;
1124 len |= ((u32)cdb[12]) << 8;
1125 len |= ((u32)cdb[13]);
1126
1127 *plba = lba;
1128 *plen = len;
1129 }
1130
1131 /**
1132 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1133 * @qc: Storage for translated ATA taskfile
1134 *
1135 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1136 *
1137 * LOCKING:
1138 * spin_lock_irqsave(host lock)
1139 *
1140 * RETURNS:
1141 * Zero on success, non-zero on error.
1142 */
1143 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1144 {
1145 struct scsi_cmnd *scmd = qc->scsicmd;
1146 struct ata_taskfile *tf = &qc->tf;
1147 struct ata_device *dev = qc->dev;
1148 u64 dev_sectors = qc->dev->n_sectors;
1149 const u8 *cdb = scmd->cmnd;
1150 u64 block;
1151 u32 n_block;
1152
1153 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1154 tf->protocol = ATA_PROT_NODATA;
1155
1156 if (cdb[0] == VERIFY) {
1157 if (scmd->cmd_len < 10)
1158 goto invalid_fld;
1159 scsi_10_lba_len(cdb, &block, &n_block);
1160 } else if (cdb[0] == VERIFY_16) {
1161 if (scmd->cmd_len < 16)
1162 goto invalid_fld;
1163 scsi_16_lba_len(cdb, &block, &n_block);
1164 } else
1165 goto invalid_fld;
1166
1167 if (!n_block)
1168 goto nothing_to_do;
1169 if (block >= dev_sectors)
1170 goto out_of_range;
1171 if ((block + n_block) > dev_sectors)
1172 goto out_of_range;
1173
1174 if (dev->flags & ATA_DFLAG_LBA) {
1175 tf->flags |= ATA_TFLAG_LBA;
1176
1177 if (lba_28_ok(block, n_block)) {
1178 /* use LBA28 */
1179 tf->command = ATA_CMD_VERIFY;
1180 tf->device |= (block >> 24) & 0xf;
1181 } else if (lba_48_ok(block, n_block)) {
1182 if (!(dev->flags & ATA_DFLAG_LBA48))
1183 goto out_of_range;
1184
1185 /* use LBA48 */
1186 tf->flags |= ATA_TFLAG_LBA48;
1187 tf->command = ATA_CMD_VERIFY_EXT;
1188
1189 tf->hob_nsect = (n_block >> 8) & 0xff;
1190
1191 tf->hob_lbah = (block >> 40) & 0xff;
1192 tf->hob_lbam = (block >> 32) & 0xff;
1193 tf->hob_lbal = (block >> 24) & 0xff;
1194 } else
1195 /* request too large even for LBA48 */
1196 goto out_of_range;
1197
1198 tf->nsect = n_block & 0xff;
1199
1200 tf->lbah = (block >> 16) & 0xff;
1201 tf->lbam = (block >> 8) & 0xff;
1202 tf->lbal = block & 0xff;
1203
1204 tf->device |= ATA_LBA;
1205 } else {
1206 /* CHS */
1207 u32 sect, head, cyl, track;
1208
1209 if (!lba_28_ok(block, n_block))
1210 goto out_of_range;
1211
1212 /* Convert LBA to CHS */
1213 track = (u32)block / dev->sectors;
1214 cyl = track / dev->heads;
1215 head = track % dev->heads;
1216 sect = (u32)block % dev->sectors + 1;
1217
1218 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1219 (u32)block, track, cyl, head, sect);
1220
1221 /* Check whether the converted CHS can fit.
1222 Cylinder: 0-65535
1223 Head: 0-15
1224 Sector: 1-255*/
1225 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1226 goto out_of_range;
1227
1228 tf->command = ATA_CMD_VERIFY;
1229 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1230 tf->lbal = sect;
1231 tf->lbam = cyl;
1232 tf->lbah = cyl >> 8;
1233 tf->device |= head;
1234 }
1235
1236 return 0;
1237
1238 invalid_fld:
1239 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1240 /* "Invalid field in cbd" */
1241 return 1;
1242
1243 out_of_range:
1244 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1245 /* "Logical Block Address out of range" */
1246 return 1;
1247
1248 nothing_to_do:
1249 scmd->result = SAM_STAT_GOOD;
1250 return 1;
1251 }
1252
1253 /**
1254 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1255 * @qc: Storage for translated ATA taskfile
1256 *
1257 * Converts any of six SCSI read/write commands into the
1258 * ATA counterpart, including starting sector (LBA),
1259 * sector count, and taking into account the device's LBA48
1260 * support.
1261 *
1262 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1263 * %WRITE_16 are currently supported.
1264 *
1265 * LOCKING:
1266 * spin_lock_irqsave(host lock)
1267 *
1268 * RETURNS:
1269 * Zero on success, non-zero on error.
1270 */
1271 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1272 {
1273 struct scsi_cmnd *scmd = qc->scsicmd;
1274 const u8 *cdb = scmd->cmnd;
1275 unsigned int tf_flags = 0;
1276 u64 block;
1277 u32 n_block;
1278 int rc;
1279
1280 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1281 tf_flags |= ATA_TFLAG_WRITE;
1282
1283 /* Calculate the SCSI LBA, transfer length and FUA. */
1284 switch (cdb[0]) {
1285 case READ_10:
1286 case WRITE_10:
1287 if (unlikely(scmd->cmd_len < 10))
1288 goto invalid_fld;
1289 scsi_10_lba_len(cdb, &block, &n_block);
1290 if (unlikely(cdb[1] & (1 << 3)))
1291 tf_flags |= ATA_TFLAG_FUA;
1292 break;
1293 case READ_6:
1294 case WRITE_6:
1295 if (unlikely(scmd->cmd_len < 6))
1296 goto invalid_fld;
1297 scsi_6_lba_len(cdb, &block, &n_block);
1298
1299 /* for 6-byte r/w commands, transfer length 0
1300 * means 256 blocks of data, not 0 block.
1301 */
1302 if (!n_block)
1303 n_block = 256;
1304 break;
1305 case READ_16:
1306 case WRITE_16:
1307 if (unlikely(scmd->cmd_len < 16))
1308 goto invalid_fld;
1309 scsi_16_lba_len(cdb, &block, &n_block);
1310 if (unlikely(cdb[1] & (1 << 3)))
1311 tf_flags |= ATA_TFLAG_FUA;
1312 break;
1313 default:
1314 DPRINTK("no-byte command\n");
1315 goto invalid_fld;
1316 }
1317
1318 /* Check and compose ATA command */
1319 if (!n_block)
1320 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1321 * length 0 means transfer 0 block of data.
1322 * However, for ATA R/W commands, sector count 0 means
1323 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1324 *
1325 * WARNING: one or two older ATA drives treat 0 as 0...
1326 */
1327 goto nothing_to_do;
1328
1329 qc->flags |= ATA_QCFLAG_IO;
1330 qc->nbytes = n_block * ATA_SECT_SIZE;
1331
1332 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1333 qc->tag);
1334 if (likely(rc == 0))
1335 return 0;
1336
1337 if (rc == -ERANGE)
1338 goto out_of_range;
1339 /* treat all other errors as -EINVAL, fall through */
1340 invalid_fld:
1341 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1342 /* "Invalid field in cbd" */
1343 return 1;
1344
1345 out_of_range:
1346 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1347 /* "Logical Block Address out of range" */
1348 return 1;
1349
1350 nothing_to_do:
1351 scmd->result = SAM_STAT_GOOD;
1352 return 1;
1353 }
1354
1355 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1356 {
1357 struct ata_port *ap = qc->ap;
1358 struct scsi_cmnd *cmd = qc->scsicmd;
1359 u8 *cdb = cmd->cmnd;
1360 int need_sense = (qc->err_mask != 0);
1361
1362 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1363 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1364 * cache
1365 */
1366 if (ap->ops->error_handler && !need_sense) {
1367 switch (qc->tf.command) {
1368 case ATA_CMD_SET_FEATURES:
1369 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1370 (qc->tf.feature == SETFEATURES_WC_OFF)) {
1371 ap->eh_info.action |= ATA_EH_REVALIDATE;
1372 ata_port_schedule_eh(ap);
1373 }
1374 break;
1375
1376 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1377 case ATA_CMD_SET_MULTI: /* multi_count changed */
1378 ap->eh_info.action |= ATA_EH_REVALIDATE;
1379 ata_port_schedule_eh(ap);
1380 break;
1381 }
1382 }
1383
1384 /* For ATA pass thru (SAT) commands, generate a sense block if
1385 * user mandated it or if there's an error. Note that if we
1386 * generate because the user forced us to, a check condition
1387 * is generated and the ATA register values are returned
1388 * whether the command completed successfully or not. If there
1389 * was no error, SK, ASC and ASCQ will all be zero.
1390 */
1391 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1392 ((cdb[2] & 0x20) || need_sense)) {
1393 ata_gen_passthru_sense(qc);
1394 } else {
1395 if (!need_sense) {
1396 cmd->result = SAM_STAT_GOOD;
1397 } else {
1398 /* TODO: decide which descriptor format to use
1399 * for 48b LBA devices and call that here
1400 * instead of the fixed desc, which is only
1401 * good for smaller LBA (and maybe CHS?)
1402 * devices.
1403 */
1404 ata_gen_ata_sense(qc);
1405 }
1406 }
1407
1408 /* XXX: track spindown state for spindown skipping and warning */
1409 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1410 qc->tf.command == ATA_CMD_STANDBYNOW1))
1411 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1412 else if (likely(system_state != SYSTEM_HALT &&
1413 system_state != SYSTEM_POWER_OFF))
1414 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1415
1416 if (need_sense && !ap->ops->error_handler)
1417 ata_dump_status(ap->print_id, &qc->result_tf);
1418
1419 qc->scsidone(cmd);
1420
1421 ata_qc_free(qc);
1422 }
1423
1424 /**
1425 * ata_scmd_need_defer - Check whether we need to defer scmd
1426 * @dev: ATA device to which the command is addressed
1427 * @is_io: Is the command IO (and thus possibly NCQ)?
1428 *
1429 * NCQ and non-NCQ commands cannot run together. As upper layer
1430 * only knows the queue depth, we are responsible for maintaining
1431 * exclusion. This function checks whether a new command can be
1432 * issued to @dev.
1433 *
1434 * LOCKING:
1435 * spin_lock_irqsave(host lock)
1436 *
1437 * RETURNS:
1438 * 1 if deferring is needed, 0 otherwise.
1439 */
1440 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1441 {
1442 struct ata_port *ap = dev->ap;
1443 int is_ncq = is_io && ata_ncq_enabled(dev);
1444
1445 if (is_ncq) {
1446 if (!ata_tag_valid(ap->active_tag))
1447 return 0;
1448 } else {
1449 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1450 return 0;
1451 }
1452 return 1;
1453 }
1454
1455 /**
1456 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1457 * @dev: ATA device to which the command is addressed
1458 * @cmd: SCSI command to execute
1459 * @done: SCSI command completion function
1460 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1461 *
1462 * Our ->queuecommand() function has decided that the SCSI
1463 * command issued can be directly translated into an ATA
1464 * command, rather than handled internally.
1465 *
1466 * This function sets up an ata_queued_cmd structure for the
1467 * SCSI command, and sends that ata_queued_cmd to the hardware.
1468 *
1469 * The xlat_func argument (actor) returns 0 if ready to execute
1470 * ATA command, else 1 to finish translation. If 1 is returned
1471 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1472 * to be set reflecting an error condition or clean (early)
1473 * termination.
1474 *
1475 * LOCKING:
1476 * spin_lock_irqsave(host lock)
1477 *
1478 * RETURNS:
1479 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1480 * needs to be deferred.
1481 */
1482 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1483 void (*done)(struct scsi_cmnd *),
1484 ata_xlat_func_t xlat_func)
1485 {
1486 struct ata_queued_cmd *qc;
1487 int is_io = xlat_func == ata_scsi_rw_xlat;
1488
1489 VPRINTK("ENTER\n");
1490
1491 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1492 goto defer;
1493
1494 qc = ata_scsi_qc_new(dev, cmd, done);
1495 if (!qc)
1496 goto err_mem;
1497
1498 /* data is present; dma-map it */
1499 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1500 cmd->sc_data_direction == DMA_TO_DEVICE) {
1501 if (unlikely(cmd->request_bufflen < 1)) {
1502 ata_dev_printk(dev, KERN_WARNING,
1503 "WARNING: zero len r/w req\n");
1504 goto err_did;
1505 }
1506
1507 if (cmd->use_sg)
1508 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1509 else
1510 ata_sg_init_one(qc, cmd->request_buffer,
1511 cmd->request_bufflen);
1512
1513 qc->dma_dir = cmd->sc_data_direction;
1514 }
1515
1516 qc->complete_fn = ata_scsi_qc_complete;
1517
1518 if (xlat_func(qc))
1519 goto early_finish;
1520
1521 /* select device, send command to hardware */
1522 ata_qc_issue(qc);
1523
1524 VPRINTK("EXIT\n");
1525 return 0;
1526
1527 early_finish:
1528 ata_qc_free(qc);
1529 qc->scsidone(cmd);
1530 DPRINTK("EXIT - early finish (good or error)\n");
1531 return 0;
1532
1533 err_did:
1534 ata_qc_free(qc);
1535 cmd->result = (DID_ERROR << 16);
1536 qc->scsidone(cmd);
1537 err_mem:
1538 DPRINTK("EXIT - internal\n");
1539 return 0;
1540
1541 defer:
1542 DPRINTK("EXIT - defer\n");
1543 return SCSI_MLQUEUE_DEVICE_BUSY;
1544 }
1545
1546 /**
1547 * ata_scsi_rbuf_get - Map response buffer.
1548 * @cmd: SCSI command containing buffer to be mapped.
1549 * @buf_out: Pointer to mapped area.
1550 *
1551 * Maps buffer contained within SCSI command @cmd.
1552 *
1553 * LOCKING:
1554 * spin_lock_irqsave(host lock)
1555 *
1556 * RETURNS:
1557 * Length of response buffer.
1558 */
1559
1560 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1561 {
1562 u8 *buf;
1563 unsigned int buflen;
1564
1565 if (cmd->use_sg) {
1566 struct scatterlist *sg;
1567
1568 sg = (struct scatterlist *) cmd->request_buffer;
1569 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1570 buflen = sg->length;
1571 } else {
1572 buf = cmd->request_buffer;
1573 buflen = cmd->request_bufflen;
1574 }
1575
1576 *buf_out = buf;
1577 return buflen;
1578 }
1579
1580 /**
1581 * ata_scsi_rbuf_put - Unmap response buffer.
1582 * @cmd: SCSI command containing buffer to be unmapped.
1583 * @buf: buffer to unmap
1584 *
1585 * Unmaps response buffer contained within @cmd.
1586 *
1587 * LOCKING:
1588 * spin_lock_irqsave(host lock)
1589 */
1590
1591 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1592 {
1593 if (cmd->use_sg) {
1594 struct scatterlist *sg;
1595
1596 sg = (struct scatterlist *) cmd->request_buffer;
1597 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1598 }
1599 }
1600
1601 /**
1602 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1603 * @args: device IDENTIFY data / SCSI command of interest.
1604 * @actor: Callback hook for desired SCSI command simulator
1605 *
1606 * Takes care of the hard work of simulating a SCSI command...
1607 * Mapping the response buffer, calling the command's handler,
1608 * and handling the handler's return value. This return value
1609 * indicates whether the handler wishes the SCSI command to be
1610 * completed successfully (0), or not (in which case cmd->result
1611 * and sense buffer are assumed to be set).
1612 *
1613 * LOCKING:
1614 * spin_lock_irqsave(host lock)
1615 */
1616
1617 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1618 unsigned int (*actor) (struct ata_scsi_args *args,
1619 u8 *rbuf, unsigned int buflen))
1620 {
1621 u8 *rbuf;
1622 unsigned int buflen, rc;
1623 struct scsi_cmnd *cmd = args->cmd;
1624
1625 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1626 memset(rbuf, 0, buflen);
1627 rc = actor(args, rbuf, buflen);
1628 ata_scsi_rbuf_put(cmd, rbuf);
1629
1630 if (rc == 0)
1631 cmd->result = SAM_STAT_GOOD;
1632 args->done(cmd);
1633 }
1634
1635 /**
1636 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1637 * @idx: byte index into SCSI response buffer
1638 * @val: value to set
1639 *
1640 * To be used by SCSI command simulator functions. This macros
1641 * expects two local variables, u8 *rbuf and unsigned int buflen,
1642 * are in scope.
1643 *
1644 * LOCKING:
1645 * None.
1646 */
1647 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1648 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1649 } while (0)
1650
1651 /**
1652 * ata_scsiop_inq_std - Simulate INQUIRY command
1653 * @args: device IDENTIFY data / SCSI command of interest.
1654 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1655 * @buflen: Response buffer length.
1656 *
1657 * Returns standard device identification data associated
1658 * with non-VPD INQUIRY command output.
1659 *
1660 * LOCKING:
1661 * spin_lock_irqsave(host lock)
1662 */
1663
1664 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1665 unsigned int buflen)
1666 {
1667 u8 hdr[] = {
1668 TYPE_DISK,
1669 0,
1670 0x5, /* claim SPC-3 version compatibility */
1671 2,
1672 95 - 4
1673 };
1674
1675 /* set scsi removeable (RMB) bit per ata bit */
1676 if (ata_id_removeable(args->id))
1677 hdr[1] |= (1 << 7);
1678
1679 VPRINTK("ENTER\n");
1680
1681 memcpy(rbuf, hdr, sizeof(hdr));
1682
1683 if (buflen > 35) {
1684 memcpy(&rbuf[8], "ATA ", 8);
1685 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1686 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1687 if (rbuf[32] == 0 || rbuf[32] == ' ')
1688 memcpy(&rbuf[32], "n/a ", 4);
1689 }
1690
1691 if (buflen > 63) {
1692 const u8 versions[] = {
1693 0x60, /* SAM-3 (no version claimed) */
1694
1695 0x03,
1696 0x20, /* SBC-2 (no version claimed) */
1697
1698 0x02,
1699 0x60 /* SPC-3 (no version claimed) */
1700 };
1701
1702 memcpy(rbuf + 59, versions, sizeof(versions));
1703 }
1704
1705 return 0;
1706 }
1707
1708 /**
1709 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1710 * @args: device IDENTIFY data / SCSI command of interest.
1711 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1712 * @buflen: Response buffer length.
1713 *
1714 * Returns list of inquiry VPD pages available.
1715 *
1716 * LOCKING:
1717 * spin_lock_irqsave(host lock)
1718 */
1719
1720 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1721 unsigned int buflen)
1722 {
1723 const u8 pages[] = {
1724 0x00, /* page 0x00, this page */
1725 0x80, /* page 0x80, unit serial no page */
1726 0x83 /* page 0x83, device ident page */
1727 };
1728 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1729
1730 if (buflen > 6)
1731 memcpy(rbuf + 4, pages, sizeof(pages));
1732
1733 return 0;
1734 }
1735
1736 /**
1737 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1738 * @args: device IDENTIFY data / SCSI command of interest.
1739 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1740 * @buflen: Response buffer length.
1741 *
1742 * Returns ATA device serial number.
1743 *
1744 * LOCKING:
1745 * spin_lock_irqsave(host lock)
1746 */
1747
1748 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1749 unsigned int buflen)
1750 {
1751 const u8 hdr[] = {
1752 0,
1753 0x80, /* this page code */
1754 0,
1755 ATA_ID_SERNO_LEN, /* page len */
1756 };
1757 memcpy(rbuf, hdr, sizeof(hdr));
1758
1759 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1760 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1761 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1762
1763 return 0;
1764 }
1765
1766 /**
1767 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1768 * @args: device IDENTIFY data / SCSI command of interest.
1769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1770 * @buflen: Response buffer length.
1771 *
1772 * Yields two logical unit device identification designators:
1773 * - vendor specific ASCII containing the ATA serial number
1774 * - SAT defined "t10 vendor id based" containing ASCII vendor
1775 * name ("ATA "), model and serial numbers.
1776 *
1777 * LOCKING:
1778 * spin_lock_irqsave(host lock)
1779 */
1780
1781 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1782 unsigned int buflen)
1783 {
1784 int num;
1785 const int sat_model_serial_desc_len = 68;
1786
1787 rbuf[1] = 0x83; /* this page code */
1788 num = 4;
1789
1790 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1791 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1792 rbuf[num + 0] = 2;
1793 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1794 num += 4;
1795 ata_id_string(args->id, (unsigned char *) rbuf + num,
1796 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1797 num += ATA_ID_SERNO_LEN;
1798 }
1799 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1800 /* SAT defined lu model and serial numbers descriptor */
1801 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1802 rbuf[num + 0] = 2;
1803 rbuf[num + 1] = 1;
1804 rbuf[num + 3] = sat_model_serial_desc_len;
1805 num += 4;
1806 memcpy(rbuf + num, "ATA ", 8);
1807 num += 8;
1808 ata_id_string(args->id, (unsigned char *) rbuf + num,
1809 ATA_ID_PROD, ATA_ID_PROD_LEN);
1810 num += ATA_ID_PROD_LEN;
1811 ata_id_string(args->id, (unsigned char *) rbuf + num,
1812 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1813 num += ATA_ID_SERNO_LEN;
1814 }
1815 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1816 return 0;
1817 }
1818
1819 /**
1820 * ata_scsiop_noop - Command handler that simply returns success.
1821 * @args: device IDENTIFY data / SCSI command of interest.
1822 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1823 * @buflen: Response buffer length.
1824 *
1825 * No operation. Simply returns success to caller, to indicate
1826 * that the caller should successfully complete this SCSI command.
1827 *
1828 * LOCKING:
1829 * spin_lock_irqsave(host lock)
1830 */
1831
1832 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1833 unsigned int buflen)
1834 {
1835 VPRINTK("ENTER\n");
1836 return 0;
1837 }
1838
1839 /**
1840 * ata_msense_push - Push data onto MODE SENSE data output buffer
1841 * @ptr_io: (input/output) Location to store more output data
1842 * @last: End of output data buffer
1843 * @buf: Pointer to BLOB being added to output buffer
1844 * @buflen: Length of BLOB
1845 *
1846 * Store MODE SENSE data on an output buffer.
1847 *
1848 * LOCKING:
1849 * None.
1850 */
1851
1852 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1853 const u8 *buf, unsigned int buflen)
1854 {
1855 u8 *ptr = *ptr_io;
1856
1857 if ((ptr + buflen - 1) > last)
1858 return;
1859
1860 memcpy(ptr, buf, buflen);
1861
1862 ptr += buflen;
1863
1864 *ptr_io = ptr;
1865 }
1866
1867 /**
1868 * ata_msense_caching - Simulate MODE SENSE caching info page
1869 * @id: device IDENTIFY data
1870 * @ptr_io: (input/output) Location to store more output data
1871 * @last: End of output data buffer
1872 *
1873 * Generate a caching info page, which conditionally indicates
1874 * write caching to the SCSI layer, depending on device
1875 * capabilities.
1876 *
1877 * LOCKING:
1878 * None.
1879 */
1880
1881 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1882 const u8 *last)
1883 {
1884 u8 page[CACHE_MPAGE_LEN];
1885
1886 memcpy(page, def_cache_mpage, sizeof(page));
1887 if (ata_id_wcache_enabled(id))
1888 page[2] |= (1 << 2); /* write cache enable */
1889 if (!ata_id_rahead_enabled(id))
1890 page[12] |= (1 << 5); /* disable read ahead */
1891
1892 ata_msense_push(ptr_io, last, page, sizeof(page));
1893 return sizeof(page);
1894 }
1895
1896 /**
1897 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1898 * @dev: Device associated with this MODE SENSE command
1899 * @ptr_io: (input/output) Location to store more output data
1900 * @last: End of output data buffer
1901 *
1902 * Generate a generic MODE SENSE control mode page.
1903 *
1904 * LOCKING:
1905 * None.
1906 */
1907
1908 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1909 {
1910 ata_msense_push(ptr_io, last, def_control_mpage,
1911 sizeof(def_control_mpage));
1912 return sizeof(def_control_mpage);
1913 }
1914
1915 /**
1916 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1917 * @dev: Device associated with this MODE SENSE command
1918 * @ptr_io: (input/output) Location to store more output data
1919 * @last: End of output data buffer
1920 *
1921 * Generate a generic MODE SENSE r/w error recovery page.
1922 *
1923 * LOCKING:
1924 * None.
1925 */
1926
1927 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1928 {
1929
1930 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1931 sizeof(def_rw_recovery_mpage));
1932 return sizeof(def_rw_recovery_mpage);
1933 }
1934
1935 /*
1936 * We can turn this into a real blacklist if it's needed, for now just
1937 * blacklist any Maxtor BANC1G10 revision firmware
1938 */
1939 static int ata_dev_supports_fua(u16 *id)
1940 {
1941 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1942
1943 if (!libata_fua)
1944 return 0;
1945 if (!ata_id_has_fua(id))
1946 return 0;
1947
1948 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1949 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1950
1951 if (strcmp(model, "Maxtor"))
1952 return 1;
1953 if (strcmp(fw, "BANC1G10"))
1954 return 1;
1955
1956 return 0; /* blacklisted */
1957 }
1958
1959 /**
1960 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1961 * @args: device IDENTIFY data / SCSI command of interest.
1962 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1963 * @buflen: Response buffer length.
1964 *
1965 * Simulate MODE SENSE commands. Assume this is invoked for direct
1966 * access devices (e.g. disks) only. There should be no block
1967 * descriptor for other device types.
1968 *
1969 * LOCKING:
1970 * spin_lock_irqsave(host lock)
1971 */
1972
1973 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1974 unsigned int buflen)
1975 {
1976 struct ata_device *dev = args->dev;
1977 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1978 const u8 sat_blk_desc[] = {
1979 0, 0, 0, 0, /* number of blocks: sat unspecified */
1980 0,
1981 0, 0x2, 0x0 /* block length: 512 bytes */
1982 };
1983 u8 pg, spg;
1984 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1985 u8 dpofua;
1986
1987 VPRINTK("ENTER\n");
1988
1989 six_byte = (scsicmd[0] == MODE_SENSE);
1990 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1991 /*
1992 * LLBA bit in msense(10) ignored (compliant)
1993 */
1994
1995 page_control = scsicmd[2] >> 6;
1996 switch (page_control) {
1997 case 0: /* current */
1998 break; /* supported */
1999 case 3: /* saved */
2000 goto saving_not_supp;
2001 case 1: /* changeable */
2002 case 2: /* defaults */
2003 default:
2004 goto invalid_fld;
2005 }
2006
2007 if (six_byte) {
2008 output_len = 4 + (ebd ? 8 : 0);
2009 alloc_len = scsicmd[4];
2010 } else {
2011 output_len = 8 + (ebd ? 8 : 0);
2012 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2013 }
2014 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2015
2016 p = rbuf + output_len;
2017 last = rbuf + minlen - 1;
2018
2019 pg = scsicmd[2] & 0x3f;
2020 spg = scsicmd[3];
2021 /*
2022 * No mode subpages supported (yet) but asking for _all_
2023 * subpages may be valid
2024 */
2025 if (spg && (spg != ALL_SUB_MPAGES))
2026 goto invalid_fld;
2027
2028 switch(pg) {
2029 case RW_RECOVERY_MPAGE:
2030 output_len += ata_msense_rw_recovery(&p, last);
2031 break;
2032
2033 case CACHE_MPAGE:
2034 output_len += ata_msense_caching(args->id, &p, last);
2035 break;
2036
2037 case CONTROL_MPAGE: {
2038 output_len += ata_msense_ctl_mode(&p, last);
2039 break;
2040 }
2041
2042 case ALL_MPAGES:
2043 output_len += ata_msense_rw_recovery(&p, last);
2044 output_len += ata_msense_caching(args->id, &p, last);
2045 output_len += ata_msense_ctl_mode(&p, last);
2046 break;
2047
2048 default: /* invalid page code */
2049 goto invalid_fld;
2050 }
2051
2052 if (minlen < 1)
2053 return 0;
2054
2055 dpofua = 0;
2056 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2057 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2058 dpofua = 1 << 4;
2059
2060 if (six_byte) {
2061 output_len--;
2062 rbuf[0] = output_len;
2063 if (minlen > 2)
2064 rbuf[2] |= dpofua;
2065 if (ebd) {
2066 if (minlen > 3)
2067 rbuf[3] = sizeof(sat_blk_desc);
2068 if (minlen > 11)
2069 memcpy(rbuf + 4, sat_blk_desc,
2070 sizeof(sat_blk_desc));
2071 }
2072 } else {
2073 output_len -= 2;
2074 rbuf[0] = output_len >> 8;
2075 if (minlen > 1)
2076 rbuf[1] = output_len;
2077 if (minlen > 3)
2078 rbuf[3] |= dpofua;
2079 if (ebd) {
2080 if (minlen > 7)
2081 rbuf[7] = sizeof(sat_blk_desc);
2082 if (minlen > 15)
2083 memcpy(rbuf + 8, sat_blk_desc,
2084 sizeof(sat_blk_desc));
2085 }
2086 }
2087 return 0;
2088
2089 invalid_fld:
2090 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2091 /* "Invalid field in cbd" */
2092 return 1;
2093
2094 saving_not_supp:
2095 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2096 /* "Saving parameters not supported" */
2097 return 1;
2098 }
2099
2100 /**
2101 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2102 * @args: device IDENTIFY data / SCSI command of interest.
2103 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2104 * @buflen: Response buffer length.
2105 *
2106 * Simulate READ CAPACITY commands.
2107 *
2108 * LOCKING:
2109 * None.
2110 */
2111 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2112 unsigned int buflen)
2113 {
2114 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2115
2116 VPRINTK("ENTER\n");
2117
2118 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2119 if (last_lba >= 0xffffffffULL)
2120 last_lba = 0xffffffff;
2121
2122 /* sector count, 32-bit */
2123 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2124 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2125 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2126 ATA_SCSI_RBUF_SET(3, last_lba);
2127
2128 /* sector size */
2129 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2130 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2131 } else {
2132 /* sector count, 64-bit */
2133 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2134 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2135 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2136 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2137 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2138 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2139 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2140 ATA_SCSI_RBUF_SET(7, last_lba);
2141
2142 /* sector size */
2143 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2144 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2145 }
2146
2147 return 0;
2148 }
2149
2150 /**
2151 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2152 * @args: device IDENTIFY data / SCSI command of interest.
2153 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2154 * @buflen: Response buffer length.
2155 *
2156 * Simulate REPORT LUNS command.
2157 *
2158 * LOCKING:
2159 * spin_lock_irqsave(host lock)
2160 */
2161
2162 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2163 unsigned int buflen)
2164 {
2165 VPRINTK("ENTER\n");
2166 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2167
2168 return 0;
2169 }
2170
2171 /**
2172 * ata_scsi_set_sense - Set SCSI sense data and status
2173 * @cmd: SCSI request to be handled
2174 * @sk: SCSI-defined sense key
2175 * @asc: SCSI-defined additional sense code
2176 * @ascq: SCSI-defined additional sense code qualifier
2177 *
2178 * Helper function that builds a valid fixed format, current
2179 * response code and the given sense key (sk), additional sense
2180 * code (asc) and additional sense code qualifier (ascq) with
2181 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2182 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2183 *
2184 * LOCKING:
2185 * Not required
2186 */
2187
2188 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2189 {
2190 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2191
2192 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2193 cmd->sense_buffer[2] = sk;
2194 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2195 cmd->sense_buffer[12] = asc;
2196 cmd->sense_buffer[13] = ascq;
2197 }
2198
2199 /**
2200 * ata_scsi_badcmd - End a SCSI request with an error
2201 * @cmd: SCSI request to be handled
2202 * @done: SCSI command completion function
2203 * @asc: SCSI-defined additional sense code
2204 * @ascq: SCSI-defined additional sense code qualifier
2205 *
2206 * Helper function that completes a SCSI command with
2207 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2208 * and the specified additional sense codes.
2209 *
2210 * LOCKING:
2211 * spin_lock_irqsave(host lock)
2212 */
2213
2214 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2215 {
2216 DPRINTK("ENTER\n");
2217 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2218
2219 done(cmd);
2220 }
2221
2222 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2223 {
2224 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2225 /* FIXME: not quite right; we don't want the
2226 * translation of taskfile registers into
2227 * a sense descriptors, since that's only
2228 * correct for ATA, not ATAPI
2229 */
2230 ata_gen_passthru_sense(qc);
2231 }
2232
2233 qc->scsidone(qc->scsicmd);
2234 ata_qc_free(qc);
2235 }
2236
2237 /* is it pointless to prefer PIO for "safety reasons"? */
2238 static inline int ata_pio_use_silly(struct ata_port *ap)
2239 {
2240 return (ap->flags & ATA_FLAG_PIO_DMA);
2241 }
2242
2243 static void atapi_request_sense(struct ata_queued_cmd *qc)
2244 {
2245 struct ata_port *ap = qc->ap;
2246 struct scsi_cmnd *cmd = qc->scsicmd;
2247
2248 DPRINTK("ATAPI request sense\n");
2249
2250 /* FIXME: is this needed? */
2251 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2252
2253 ap->ops->tf_read(ap, &qc->tf);
2254
2255 /* fill these in, for the case where they are -not- overwritten */
2256 cmd->sense_buffer[0] = 0x70;
2257 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2258
2259 ata_qc_reinit(qc);
2260
2261 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2262 qc->dma_dir = DMA_FROM_DEVICE;
2263
2264 memset(&qc->cdb, 0, qc->dev->cdb_len);
2265 qc->cdb[0] = REQUEST_SENSE;
2266 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2267
2268 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2269 qc->tf.command = ATA_CMD_PACKET;
2270
2271 if (ata_pio_use_silly(ap)) {
2272 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2273 qc->tf.feature |= ATAPI_PKT_DMA;
2274 } else {
2275 qc->tf.protocol = ATA_PROT_ATAPI;
2276 qc->tf.lbam = (8 * 1024) & 0xff;
2277 qc->tf.lbah = (8 * 1024) >> 8;
2278 }
2279 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2280
2281 qc->complete_fn = atapi_sense_complete;
2282
2283 ata_qc_issue(qc);
2284
2285 DPRINTK("EXIT\n");
2286 }
2287
2288 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2289 {
2290 struct scsi_cmnd *cmd = qc->scsicmd;
2291 unsigned int err_mask = qc->err_mask;
2292
2293 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2294
2295 /* handle completion from new EH */
2296 if (unlikely(qc->ap->ops->error_handler &&
2297 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2298
2299 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2300 /* FIXME: not quite right; we don't want the
2301 * translation of taskfile registers into a
2302 * sense descriptors, since that's only
2303 * correct for ATA, not ATAPI
2304 */
2305 ata_gen_passthru_sense(qc);
2306 }
2307
2308 /* SCSI EH automatically locks door if sdev->locked is
2309 * set. Sometimes door lock request continues to
2310 * fail, for example, when no media is present. This
2311 * creates a loop - SCSI EH issues door lock which
2312 * fails and gets invoked again to acquire sense data
2313 * for the failed command.
2314 *
2315 * If door lock fails, always clear sdev->locked to
2316 * avoid this infinite loop.
2317 */
2318 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2319 qc->dev->sdev->locked = 0;
2320
2321 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2322 qc->scsidone(cmd);
2323 ata_qc_free(qc);
2324 return;
2325 }
2326
2327 /* successful completion or old EH failure path */
2328 if (unlikely(err_mask & AC_ERR_DEV)) {
2329 cmd->result = SAM_STAT_CHECK_CONDITION;
2330 atapi_request_sense(qc);
2331 return;
2332 } else if (unlikely(err_mask)) {
2333 /* FIXME: not quite right; we don't want the
2334 * translation of taskfile registers into
2335 * a sense descriptors, since that's only
2336 * correct for ATA, not ATAPI
2337 */
2338 ata_gen_passthru_sense(qc);
2339 } else {
2340 u8 *scsicmd = cmd->cmnd;
2341
2342 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2343 u8 *buf = NULL;
2344 unsigned int buflen;
2345
2346 buflen = ata_scsi_rbuf_get(cmd, &buf);
2347
2348 /* ATAPI devices typically report zero for their SCSI version,
2349 * and sometimes deviate from the spec WRT response data
2350 * format. If SCSI version is reported as zero like normal,
2351 * then we make the following fixups: 1) Fake MMC-5 version,
2352 * to indicate to the Linux scsi midlayer this is a modern
2353 * device. 2) Ensure response data format / ATAPI information
2354 * are always correct.
2355 */
2356 if (buf[2] == 0) {
2357 buf[2] = 0x5;
2358 buf[3] = 0x32;
2359 }
2360
2361 ata_scsi_rbuf_put(cmd, buf);
2362 }
2363
2364 cmd->result = SAM_STAT_GOOD;
2365 }
2366
2367 qc->scsidone(cmd);
2368 ata_qc_free(qc);
2369 }
2370 /**
2371 * atapi_xlat - Initialize PACKET taskfile
2372 * @qc: command structure to be initialized
2373 *
2374 * LOCKING:
2375 * spin_lock_irqsave(host lock)
2376 *
2377 * RETURNS:
2378 * Zero on success, non-zero on failure.
2379 */
2380 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2381 {
2382 struct scsi_cmnd *scmd = qc->scsicmd;
2383 struct ata_device *dev = qc->dev;
2384 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2385 int nodata = (scmd->sc_data_direction == DMA_NONE);
2386
2387 memset(qc->cdb, 0, dev->cdb_len);
2388 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2389
2390 qc->complete_fn = atapi_qc_complete;
2391
2392 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2393 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2394 qc->tf.flags |= ATA_TFLAG_WRITE;
2395 DPRINTK("direction: write\n");
2396 }
2397
2398 qc->tf.command = ATA_CMD_PACKET;
2399 qc->nbytes = scmd->request_bufflen;
2400
2401 /* check whether ATAPI DMA is safe */
2402 if (!using_pio && ata_check_atapi_dma(qc))
2403 using_pio = 1;
2404
2405 if (using_pio || nodata) {
2406 /* no data, or PIO data xfer */
2407 if (nodata)
2408 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2409 else
2410 qc->tf.protocol = ATA_PROT_ATAPI;
2411 qc->tf.lbam = (8 * 1024) & 0xff;
2412 qc->tf.lbah = (8 * 1024) >> 8;
2413 } else {
2414 /* DMA data xfer */
2415 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2416 qc->tf.feature |= ATAPI_PKT_DMA;
2417
2418 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2419 /* some SATA bridges need us to indicate data xfer direction */
2420 qc->tf.feature |= ATAPI_DMADIR;
2421 }
2422
2423 return 0;
2424 }
2425
2426 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2427 {
2428 if (likely(id < ATA_MAX_DEVICES))
2429 return &ap->device[id];
2430 return NULL;
2431 }
2432
2433 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2434 const struct scsi_device *scsidev)
2435 {
2436 /* skip commands not addressed to targets we simulate */
2437 if (unlikely(scsidev->channel || scsidev->lun))
2438 return NULL;
2439
2440 return ata_find_dev(ap, scsidev->id);
2441 }
2442
2443 /**
2444 * ata_scsi_dev_enabled - determine if device is enabled
2445 * @dev: ATA device
2446 *
2447 * Determine if commands should be sent to the specified device.
2448 *
2449 * LOCKING:
2450 * spin_lock_irqsave(host lock)
2451 *
2452 * RETURNS:
2453 * 0 if commands are not allowed / 1 if commands are allowed
2454 */
2455
2456 static int ata_scsi_dev_enabled(struct ata_device *dev)
2457 {
2458 if (unlikely(!ata_dev_enabled(dev)))
2459 return 0;
2460
2461 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2462 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2463 ata_dev_printk(dev, KERN_WARNING,
2464 "WARNING: ATAPI is %s, device ignored.\n",
2465 atapi_enabled ? "not supported with this driver" : "disabled");
2466 return 0;
2467 }
2468 }
2469
2470 return 1;
2471 }
2472
2473 /**
2474 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2475 * @ap: ATA port to which the device is attached
2476 * @scsidev: SCSI device from which we derive the ATA device
2477 *
2478 * Given various information provided in struct scsi_cmnd,
2479 * map that onto an ATA bus, and using that mapping
2480 * determine which ata_device is associated with the
2481 * SCSI command to be sent.
2482 *
2483 * LOCKING:
2484 * spin_lock_irqsave(host lock)
2485 *
2486 * RETURNS:
2487 * Associated ATA device, or %NULL if not found.
2488 */
2489 static struct ata_device *
2490 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2491 {
2492 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2493
2494 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2495 return NULL;
2496
2497 return dev;
2498 }
2499
2500 /*
2501 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2502 * @byte1: Byte 1 from pass-thru CDB.
2503 *
2504 * RETURNS:
2505 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2506 */
2507 static u8
2508 ata_scsi_map_proto(u8 byte1)
2509 {
2510 switch((byte1 & 0x1e) >> 1) {
2511 case 3: /* Non-data */
2512 return ATA_PROT_NODATA;
2513
2514 case 6: /* DMA */
2515 case 10: /* UDMA Data-in */
2516 case 11: /* UDMA Data-Out */
2517 return ATA_PROT_DMA;
2518
2519 case 4: /* PIO Data-in */
2520 case 5: /* PIO Data-out */
2521 return ATA_PROT_PIO;
2522
2523 case 0: /* Hard Reset */
2524 case 1: /* SRST */
2525 case 8: /* Device Diagnostic */
2526 case 9: /* Device Reset */
2527 case 7: /* DMA Queued */
2528 case 12: /* FPDMA */
2529 case 15: /* Return Response Info */
2530 default: /* Reserved */
2531 break;
2532 }
2533
2534 return ATA_PROT_UNKNOWN;
2535 }
2536
2537 /**
2538 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2539 * @qc: command structure to be initialized
2540 *
2541 * Handles either 12 or 16-byte versions of the CDB.
2542 *
2543 * RETURNS:
2544 * Zero on success, non-zero on failure.
2545 */
2546 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2547 {
2548 struct ata_taskfile *tf = &(qc->tf);
2549 struct scsi_cmnd *scmd = qc->scsicmd;
2550 struct ata_device *dev = qc->dev;
2551 const u8 *cdb = scmd->cmnd;
2552
2553 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2554 goto invalid_fld;
2555
2556 /* We may not issue DMA commands if no DMA mode is set */
2557 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2558 goto invalid_fld;
2559
2560 /*
2561 * 12 and 16 byte CDBs use different offsets to
2562 * provide the various register values.
2563 */
2564 if (cdb[0] == ATA_16) {
2565 /*
2566 * 16-byte CDB - may contain extended commands.
2567 *
2568 * If that is the case, copy the upper byte register values.
2569 */
2570 if (cdb[1] & 0x01) {
2571 tf->hob_feature = cdb[3];
2572 tf->hob_nsect = cdb[5];
2573 tf->hob_lbal = cdb[7];
2574 tf->hob_lbam = cdb[9];
2575 tf->hob_lbah = cdb[11];
2576 tf->flags |= ATA_TFLAG_LBA48;
2577 } else
2578 tf->flags &= ~ATA_TFLAG_LBA48;
2579
2580 /*
2581 * Always copy low byte, device and command registers.
2582 */
2583 tf->feature = cdb[4];
2584 tf->nsect = cdb[6];
2585 tf->lbal = cdb[8];
2586 tf->lbam = cdb[10];
2587 tf->lbah = cdb[12];
2588 tf->device = cdb[13];
2589 tf->command = cdb[14];
2590 } else {
2591 /*
2592 * 12-byte CDB - incapable of extended commands.
2593 */
2594 tf->flags &= ~ATA_TFLAG_LBA48;
2595
2596 tf->feature = cdb[3];
2597 tf->nsect = cdb[4];
2598 tf->lbal = cdb[5];
2599 tf->lbam = cdb[6];
2600 tf->lbah = cdb[7];
2601 tf->device = cdb[8];
2602 tf->command = cdb[9];
2603 }
2604
2605 /* enforce correct master/slave bit */
2606 tf->device = dev->devno ?
2607 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2608
2609 /* sanity check for pio multi commands */
2610 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2611 goto invalid_fld;
2612
2613 if (is_multi_taskfile(tf)) {
2614 unsigned int multi_count = 1 << (cdb[1] >> 5);
2615
2616 /* compare the passed through multi_count
2617 * with the cached multi_count of libata
2618 */
2619 if (multi_count != dev->multi_count)
2620 ata_dev_printk(dev, KERN_WARNING,
2621 "invalid multi_count %u ignored\n",
2622 multi_count);
2623 }
2624
2625 /* READ/WRITE LONG use a non-standard sect_size */
2626 qc->sect_size = ATA_SECT_SIZE;
2627 switch (tf->command) {
2628 case ATA_CMD_READ_LONG:
2629 case ATA_CMD_READ_LONG_ONCE:
2630 case ATA_CMD_WRITE_LONG:
2631 case ATA_CMD_WRITE_LONG_ONCE:
2632 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2633 goto invalid_fld;
2634 qc->sect_size = scmd->request_bufflen;
2635 }
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))
2646 goto invalid_fld;
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
2655 if (scmd->sc_data_direction == DMA_TO_DEVICE)
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 */
2664 qc->nbytes = scmd->request_bufflen;
2665
2666 /* request result TF */
2667 qc->flags |= ATA_QCFLAG_RESULT_TF;
2668
2669 return 0;
2670
2671 invalid_fld:
2672 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2673 /* "Invalid field in cdb" */
2674 return 1;
2675 }
2676
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;
2709
2710 case ATA_12:
2711 case ATA_16:
2712 return ata_scsi_pass_thru;
2713
2714 case START_STOP:
2715 return ata_scsi_start_stop_xlat;
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->print_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
2745 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2746 void (*done)(struct scsi_cmnd *),
2747 struct ata_device *dev)
2748 {
2749 int rc = 0;
2750
2751 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) {
2752 DPRINTK("bad CDB len=%u, max=%u\n",
2753 scmd->cmd_len, dev->cdb_len);
2754 scmd->result = DID_ERROR << 16;
2755 done(scmd);
2756 return 0;
2757 }
2758
2759 if (dev->class == ATA_DEV_ATA) {
2760 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2761 scmd->cmnd[0]);
2762
2763 if (xlat_func)
2764 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2765 else
2766 ata_scsi_simulate(dev, scmd, done);
2767 } else
2768 rc = ata_scsi_translate(dev, scmd, done, atapi_xlat);
2769
2770 return rc;
2771 }
2772
2773 /**
2774 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2775 * @cmd: SCSI command to be sent
2776 * @done: Completion function, called when command is complete
2777 *
2778 * In some cases, this function translates SCSI commands into
2779 * ATA taskfiles, and queues the taskfiles to be sent to
2780 * hardware. In other cases, this function simulates a
2781 * SCSI device by evaluating and responding to certain
2782 * SCSI commands. This creates the overall effect of
2783 * ATA and ATAPI devices appearing as SCSI devices.
2784 *
2785 * LOCKING:
2786 * Releases scsi-layer-held lock, and obtains host lock.
2787 *
2788 * RETURNS:
2789 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2790 * 0 otherwise.
2791 */
2792 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2793 {
2794 struct ata_port *ap;
2795 struct ata_device *dev;
2796 struct scsi_device *scsidev = cmd->device;
2797 struct Scsi_Host *shost = scsidev->host;
2798 int rc = 0;
2799
2800 ap = ata_shost_to_port(shost);
2801
2802 spin_unlock(shost->host_lock);
2803 spin_lock(ap->lock);
2804
2805 ata_scsi_dump_cdb(ap, cmd);
2806
2807 dev = ata_scsi_find_dev(ap, scsidev);
2808 if (likely(dev))
2809 rc = __ata_scsi_queuecmd(cmd, done, dev);
2810 else {
2811 cmd->result = (DID_BAD_TARGET << 16);
2812 done(cmd);
2813 }
2814
2815 spin_unlock(ap->lock);
2816 spin_lock(shost->host_lock);
2817 return rc;
2818 }
2819
2820 /**
2821 * ata_scsi_simulate - simulate SCSI command on ATA device
2822 * @dev: the target device
2823 * @cmd: SCSI command being sent to device.
2824 * @done: SCSI command completion function.
2825 *
2826 * Interprets and directly executes a select list of SCSI commands
2827 * that can be handled internally.
2828 *
2829 * LOCKING:
2830 * spin_lock_irqsave(host lock)
2831 */
2832
2833 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2834 void (*done)(struct scsi_cmnd *))
2835 {
2836 struct ata_scsi_args args;
2837 const u8 *scsicmd = cmd->cmnd;
2838
2839 args.dev = dev;
2840 args.id = dev->id;
2841 args.cmd = cmd;
2842 args.done = done;
2843
2844 switch(scsicmd[0]) {
2845 /* no-op's, complete with success */
2846 case SYNCHRONIZE_CACHE:
2847 case REZERO_UNIT:
2848 case SEEK_6:
2849 case SEEK_10:
2850 case TEST_UNIT_READY:
2851 case FORMAT_UNIT: /* FIXME: correct? */
2852 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2853 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2854 break;
2855
2856 case INQUIRY:
2857 if (scsicmd[1] & 2) /* is CmdDt set? */
2858 ata_scsi_invalid_field(cmd, done);
2859 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2860 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2861 else if (scsicmd[2] == 0x00)
2862 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2863 else if (scsicmd[2] == 0x80)
2864 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2865 else if (scsicmd[2] == 0x83)
2866 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2867 else
2868 ata_scsi_invalid_field(cmd, done);
2869 break;
2870
2871 case MODE_SENSE:
2872 case MODE_SENSE_10:
2873 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2874 break;
2875
2876 case MODE_SELECT: /* unconditionally return */
2877 case MODE_SELECT_10: /* bad-field-in-cdb */
2878 ata_scsi_invalid_field(cmd, done);
2879 break;
2880
2881 case READ_CAPACITY:
2882 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2883 break;
2884
2885 case SERVICE_ACTION_IN:
2886 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2887 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2888 else
2889 ata_scsi_invalid_field(cmd, done);
2890 break;
2891
2892 case REPORT_LUNS:
2893 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2894 break;
2895
2896 /* mandatory commands we haven't implemented yet */
2897 case REQUEST_SENSE:
2898
2899 /* all other commands */
2900 default:
2901 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2902 /* "Invalid command operation code" */
2903 done(cmd);
2904 break;
2905 }
2906 }
2907
2908 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
2909 {
2910 int i, rc;
2911
2912 for (i = 0; i < host->n_ports; i++) {
2913 struct ata_port *ap = host->ports[i];
2914 struct Scsi_Host *shost;
2915
2916 rc = -ENOMEM;
2917 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
2918 if (!shost)
2919 goto err_alloc;
2920
2921 *(struct ata_port **)&shost->hostdata[0] = ap;
2922 ap->scsi_host = shost;
2923
2924 shost->transportt = &ata_scsi_transport_template;
2925 shost->unique_id = ap->print_id;
2926 shost->max_id = 16;
2927 shost->max_lun = 1;
2928 shost->max_channel = 1;
2929 shost->max_cmd_len = 16;
2930
2931 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
2932 if (rc)
2933 goto err_add;
2934 }
2935
2936 return 0;
2937
2938 err_add:
2939 scsi_host_put(host->ports[i]->scsi_host);
2940 err_alloc:
2941 while (--i >= 0) {
2942 struct Scsi_Host *shost = host->ports[i]->scsi_host;
2943
2944 scsi_remove_host(shost);
2945 scsi_host_put(shost);
2946 }
2947 return rc;
2948 }
2949
2950 void ata_scsi_scan_host(struct ata_port *ap)
2951 {
2952 unsigned int i;
2953
2954 if (ap->flags & ATA_FLAG_DISABLED)
2955 return;
2956
2957 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2958 struct ata_device *dev = &ap->device[i];
2959 struct scsi_device *sdev;
2960
2961 if (!ata_dev_enabled(dev) || dev->sdev)
2962 continue;
2963
2964 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
2965 if (!IS_ERR(sdev)) {
2966 dev->sdev = sdev;
2967 scsi_device_put(sdev);
2968 }
2969 }
2970 }
2971
2972 /**
2973 * ata_scsi_offline_dev - offline attached SCSI device
2974 * @dev: ATA device to offline attached SCSI device for
2975 *
2976 * This function is called from ata_eh_hotplug() and responsible
2977 * for taking the SCSI device attached to @dev offline. This
2978 * function is called with host lock which protects dev->sdev
2979 * against clearing.
2980 *
2981 * LOCKING:
2982 * spin_lock_irqsave(host lock)
2983 *
2984 * RETURNS:
2985 * 1 if attached SCSI device exists, 0 otherwise.
2986 */
2987 int ata_scsi_offline_dev(struct ata_device *dev)
2988 {
2989 if (dev->sdev) {
2990 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
2991 return 1;
2992 }
2993 return 0;
2994 }
2995
2996 /**
2997 * ata_scsi_remove_dev - remove attached SCSI device
2998 * @dev: ATA device to remove attached SCSI device for
2999 *
3000 * This function is called from ata_eh_scsi_hotplug() and
3001 * responsible for removing the SCSI device attached to @dev.
3002 *
3003 * LOCKING:
3004 * Kernel thread context (may sleep).
3005 */
3006 static void ata_scsi_remove_dev(struct ata_device *dev)
3007 {
3008 struct ata_port *ap = dev->ap;
3009 struct scsi_device *sdev;
3010 unsigned long flags;
3011
3012 /* Alas, we need to grab scan_mutex to ensure SCSI device
3013 * state doesn't change underneath us and thus
3014 * scsi_device_get() always succeeds. The mutex locking can
3015 * be removed if there is __scsi_device_get() interface which
3016 * increments reference counts regardless of device state.
3017 */
3018 mutex_lock(&ap->scsi_host->scan_mutex);
3019 spin_lock_irqsave(ap->lock, flags);
3020
3021 /* clearing dev->sdev is protected by host lock */
3022 sdev = dev->sdev;
3023 dev->sdev = NULL;
3024
3025 if (sdev) {
3026 /* If user initiated unplug races with us, sdev can go
3027 * away underneath us after the host lock and
3028 * scan_mutex are released. Hold onto it.
3029 */
3030 if (scsi_device_get(sdev) == 0) {
3031 /* The following ensures the attached sdev is
3032 * offline on return from ata_scsi_offline_dev()
3033 * regardless it wins or loses the race
3034 * against this function.
3035 */
3036 scsi_device_set_state(sdev, SDEV_OFFLINE);
3037 } else {
3038 WARN_ON(1);
3039 sdev = NULL;
3040 }
3041 }
3042
3043 spin_unlock_irqrestore(ap->lock, flags);
3044 mutex_unlock(&ap->scsi_host->scan_mutex);
3045
3046 if (sdev) {
3047 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3048 sdev->sdev_gendev.bus_id);
3049
3050 scsi_remove_device(sdev);
3051 scsi_device_put(sdev);
3052 }
3053 }
3054
3055 /**
3056 * ata_scsi_hotplug - SCSI part of hotplug
3057 * @work: Pointer to ATA port to perform SCSI hotplug on
3058 *
3059 * Perform SCSI part of hotplug. It's executed from a separate
3060 * workqueue after EH completes. This is necessary because SCSI
3061 * hot plugging requires working EH and hot unplugging is
3062 * synchronized with hot plugging with a mutex.
3063 *
3064 * LOCKING:
3065 * Kernel thread context (may sleep).
3066 */
3067 void ata_scsi_hotplug(struct work_struct *work)
3068 {
3069 struct ata_port *ap =
3070 container_of(work, struct ata_port, hotplug_task.work);
3071 int i;
3072
3073 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3074 DPRINTK("ENTER/EXIT - unloading\n");
3075 return;
3076 }
3077
3078 DPRINTK("ENTER\n");
3079
3080 /* unplug detached devices */
3081 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3082 struct ata_device *dev = &ap->device[i];
3083 unsigned long flags;
3084
3085 if (!(dev->flags & ATA_DFLAG_DETACHED))
3086 continue;
3087
3088 spin_lock_irqsave(ap->lock, flags);
3089 dev->flags &= ~ATA_DFLAG_DETACHED;
3090 spin_unlock_irqrestore(ap->lock, flags);
3091
3092 ata_scsi_remove_dev(dev);
3093 }
3094
3095 /* scan for new ones */
3096 ata_scsi_scan_host(ap);
3097
3098 /* If we scanned while EH was in progress, scan would have
3099 * failed silently. Requeue if there are enabled but
3100 * unattached devices.
3101 */
3102 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3103 struct ata_device *dev = &ap->device[i];
3104 if (ata_dev_enabled(dev) && !dev->sdev) {
3105 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3106 round_jiffies_relative(HZ));
3107 break;
3108 }
3109 }
3110
3111 DPRINTK("EXIT\n");
3112 }
3113
3114 /**
3115 * ata_scsi_user_scan - indication for user-initiated bus scan
3116 * @shost: SCSI host to scan
3117 * @channel: Channel to scan
3118 * @id: ID to scan
3119 * @lun: LUN to scan
3120 *
3121 * This function is called when user explicitly requests bus
3122 * scan. Set probe pending flag and invoke EH.
3123 *
3124 * LOCKING:
3125 * SCSI layer (we don't care)
3126 *
3127 * RETURNS:
3128 * Zero.
3129 */
3130 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3131 unsigned int id, unsigned int lun)
3132 {
3133 struct ata_port *ap = ata_shost_to_port(shost);
3134 unsigned long flags;
3135 int rc = 0;
3136
3137 if (!ap->ops->error_handler)
3138 return -EOPNOTSUPP;
3139
3140 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3141 (lun != SCAN_WILD_CARD && lun != 0))
3142 return -EINVAL;
3143
3144 spin_lock_irqsave(ap->lock, flags);
3145
3146 if (id == SCAN_WILD_CARD) {
3147 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3148 ap->eh_info.action |= ATA_EH_SOFTRESET;
3149 } else {
3150 struct ata_device *dev = ata_find_dev(ap, id);
3151
3152 if (dev) {
3153 ap->eh_info.probe_mask |= 1 << dev->devno;
3154 ap->eh_info.action |= ATA_EH_SOFTRESET;
3155 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
3156 } else
3157 rc = -EINVAL;
3158 }
3159
3160 if (rc == 0) {
3161 ata_port_schedule_eh(ap);
3162 spin_unlock_irqrestore(ap->lock, flags);
3163 ata_port_wait_eh(ap);
3164 } else
3165 spin_unlock_irqrestore(ap->lock, flags);
3166
3167 return rc;
3168 }
3169
3170 /**
3171 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3172 * @work: Pointer to ATA port to perform scsi_rescan_device()
3173 *
3174 * After ATA pass thru (SAT) commands are executed successfully,
3175 * libata need to propagate the changes to SCSI layer. This
3176 * function must be executed from ata_aux_wq such that sdev
3177 * attach/detach don't race with rescan.
3178 *
3179 * LOCKING:
3180 * Kernel thread context (may sleep).
3181 */
3182 void ata_scsi_dev_rescan(struct work_struct *work)
3183 {
3184 struct ata_port *ap =
3185 container_of(work, struct ata_port, scsi_rescan_task);
3186 unsigned long flags;
3187 unsigned int i;
3188
3189 spin_lock_irqsave(ap->lock, flags);
3190
3191 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3192 struct ata_device *dev = &ap->device[i];
3193 struct scsi_device *sdev = dev->sdev;
3194
3195 if (!ata_dev_enabled(dev) || !sdev)
3196 continue;
3197 if (scsi_device_get(sdev))
3198 continue;
3199
3200 spin_unlock_irqrestore(ap->lock, flags);
3201 scsi_rescan_device(&(sdev->sdev_gendev));
3202 scsi_device_put(sdev);
3203 spin_lock_irqsave(ap->lock, flags);
3204 }
3205
3206 spin_unlock_irqrestore(ap->lock, flags);
3207 }
3208
3209 /**
3210 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3211 * @host: ATA host container for all SAS ports
3212 * @port_info: Information from low-level host driver
3213 * @shost: SCSI host that the scsi device is attached to
3214 *
3215 * LOCKING:
3216 * PCI/etc. bus probe sem.
3217 *
3218 * RETURNS:
3219 * ata_port pointer on success / NULL on failure.
3220 */
3221
3222 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3223 struct ata_port_info *port_info,
3224 struct Scsi_Host *shost)
3225 {
3226 struct ata_port *ap;
3227
3228 ap = ata_port_alloc(host);
3229 if (!ap)
3230 return NULL;
3231
3232 ap->port_no = 0;
3233 ap->lock = shost->host_lock;
3234 ap->pio_mask = port_info->pio_mask;
3235 ap->mwdma_mask = port_info->mwdma_mask;
3236 ap->udma_mask = port_info->udma_mask;
3237 ap->flags |= port_info->flags;
3238 ap->ops = port_info->port_ops;
3239 ap->cbl = ATA_CBL_SATA;
3240
3241 return ap;
3242 }
3243 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3244
3245 /**
3246 * ata_sas_port_start - Set port up for dma.
3247 * @ap: Port to initialize
3248 *
3249 * Called just after data structures for each port are
3250 * initialized. Allocates DMA pad.
3251 *
3252 * May be used as the port_start() entry in ata_port_operations.
3253 *
3254 * LOCKING:
3255 * Inherited from caller.
3256 */
3257 int ata_sas_port_start(struct ata_port *ap)
3258 {
3259 return ata_pad_alloc(ap, ap->dev);
3260 }
3261 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3262
3263 /**
3264 * ata_port_stop - Undo ata_sas_port_start()
3265 * @ap: Port to shut down
3266 *
3267 * Frees the DMA pad.
3268 *
3269 * May be used as the port_stop() entry in ata_port_operations.
3270 *
3271 * LOCKING:
3272 * Inherited from caller.
3273 */
3274
3275 void ata_sas_port_stop(struct ata_port *ap)
3276 {
3277 ata_pad_free(ap, ap->dev);
3278 }
3279 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3280
3281 /**
3282 * ata_sas_port_init - Initialize a SATA device
3283 * @ap: SATA port to initialize
3284 *
3285 * LOCKING:
3286 * PCI/etc. bus probe sem.
3287 *
3288 * RETURNS:
3289 * Zero on success, non-zero on error.
3290 */
3291
3292 int ata_sas_port_init(struct ata_port *ap)
3293 {
3294 int rc = ap->ops->port_start(ap);
3295
3296 if (!rc) {
3297 ap->print_id = ata_print_id++;
3298 rc = ata_bus_probe(ap);
3299 }
3300
3301 return rc;
3302 }
3303 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3304
3305 /**
3306 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3307 * @ap: SATA port to destroy
3308 *
3309 */
3310
3311 void ata_sas_port_destroy(struct ata_port *ap)
3312 {
3313 if (ap->ops->port_stop)
3314 ap->ops->port_stop(ap);
3315 kfree(ap);
3316 }
3317 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3318
3319 /**
3320 * ata_sas_slave_configure - Default slave_config routine for libata devices
3321 * @sdev: SCSI device to configure
3322 * @ap: ATA port to which SCSI device is attached
3323 *
3324 * RETURNS:
3325 * Zero.
3326 */
3327
3328 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3329 {
3330 ata_scsi_sdev_config(sdev);
3331 ata_scsi_dev_config(sdev, ap->device);
3332 return 0;
3333 }
3334 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3335
3336 /**
3337 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3338 * @cmd: SCSI command to be sent
3339 * @done: Completion function, called when command is complete
3340 * @ap: ATA port to which the command is being sent
3341 *
3342 * RETURNS:
3343 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3344 * 0 otherwise.
3345 */
3346
3347 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3348 struct ata_port *ap)
3349 {
3350 int rc = 0;
3351
3352 ata_scsi_dump_cdb(ap, cmd);
3353
3354 if (likely(ata_scsi_dev_enabled(ap->device)))
3355 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
3356 else {
3357 cmd->result = (DID_BAD_TARGET << 16);
3358 done(cmd);
3359 }
3360 return rc;
3361 }
3362 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Software Suspend 2 for Linus's 2.6 head (mirror)