projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
libata-scsi: Remove !use_sg code paths
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
1da177e4 40#include <scsi/scsi_host.h>
beb40487 41#include <scsi/scsi_cmnd.h>
85837ebd 42#include <scsi/scsi_eh.h>
005a5a06 43#include <scsi/scsi_device.h>
a6e6ce8e 44#include <scsi/scsi_tcq.h>
30afc84c 45#include <scsi/scsi_transport.h>
1da177e4 46#include <linux/libata.h>
b095518e 47#include <linux/hdreg.h>
1da177e4
LT		 48#include <asm/uaccess.h>
49
50#include "libata.h"
51
b095518e
JG		 52#define SECTOR_SIZE 512
53
ad706991 54typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
ab5b3a5b
TH		 55
56static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
83c47bcb
TH		 60static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
ab5b3a5b 62
1da177e4 63
00ac37f5
DG		 64#define RW_RECOVERY_MPAGE 0x1
65#define RW_RECOVERY_MPAGE_LEN 12
66#define CACHE_MPAGE 0x8
67#define CACHE_MPAGE_LEN 20
68#define CONTROL_MPAGE 0xa
69#define CONTROL_MPAGE_LEN 12
70#define ALL_MPAGES 0x3f
71#define ALL_SUB_MPAGES 0xff
72
73
74static 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
85static 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
94static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE,
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
101};
102
30afc84c
TH		 103/*
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
106 */
f3187195 107static struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 108 .eh_strategy_handler = ata_scsi_error,
30afc84c 109 .eh_timed_out = ata_scsi_timed_out,
ccf68c34 110 .user_scan = ata_scsi_user_scan,
30afc84c
TH		 111};
112
1da177e4 113
ae006510
DG		 114static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
116{
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
119 done(cmd);
120}
121
1da177e4
LT		 122/**
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
128 *
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
133 *
134 * LOCKING:
135 * Defined by the SCSI layer. We don't really care.
136 *
137 * RETURNS:
138 * Zero.
139 */
140int 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
5924b74c
TH		 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 */
162static 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
b095518e
JG		 190/**
191 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 192 * @scsidev: Device to which we are issuing command
b095518e
JG		 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 */
b095518e
JG		 201int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
202{
203 int rc = 0;
204 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 205 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 206 int argsize = 0;
85837ebd 207 enum dma_data_direction data_dir;
bbe1fe7e 208 int cmd_result;
b095518e 209
c893a3ae 210 if (arg == NULL)
b095518e
JG		 211 return -EINVAL;
212
213 if (copy_from_user(args, arg, sizeof(args)))
214 return -EFAULT;
215
bbe1fe7e
ET		 216 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
217 if (!sensebuf)
218 return -ENOMEM;
219
b095518e
JG		 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);
54dac83c
JR		 225 if (argbuf == NULL) {
226 rc = -ENOMEM;
227 goto error;
228 }
b095518e
JG		 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 */
85837ebd 233 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 234 } else {
235 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 236 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 237 data_dir = DMA_NONE;
b095518e
JG		 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... */
bbe1fe7e
ET		 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) {
b095518e
JG		 286 rc = -EIO;
287 goto error;
288 }
289
b095518e 290 if ((argbuf)
c893a3ae 291 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 292 rc = -EFAULT;
293error:
bbe1fe7e 294 kfree(sensebuf);
8f760780 295 kfree(argbuf);
b095518e
JG		 296 return rc;
297}
298
299/**
300 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 301 * @scsidev: Device to which we are issuing command
b095518e
JG		 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 */
310int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
311{
312 int rc = 0;
313 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 314 u8 args[7], *sensebuf = NULL;
315 int cmd_result;
b095518e 316
c893a3ae 317 if (arg == NULL)
b095518e
JG		 318 return -EINVAL;
319
320 if (copy_from_user(args, arg, sizeof(args)))
321 return -EFAULT;
322
af068bd1
DM		 323 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
324 if (!sensebuf)
325 return -ENOMEM;
326
b095518e
JG		 327 memset(scsi_cmd, 0, sizeof(scsi_cmd));
328 scsi_cmd[0] = ATA_16;
329 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 330 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 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];
277239f2 336 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 337 scsi_cmd[14] = args[0];
338
b095518e 339 /* Good values for timeout and retries? Values below
2e9edbf8 340 from scsi_ioctl_send_command() for default case... */
af068bd1
DM		 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) {
b095518e 375 rc = -EIO;
af068bd1
DM		 376 goto error;
377 }
b095518e 378
af068bd1
DM		 379 error:
380 kfree(sensebuf);
b095518e
JG		 381 return rc;
382}
383
1da177e4
LT		 384int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
385{
1da177e4
LT		 386 int val = -EINVAL, rc = -EINVAL;
387
1da177e4
LT		 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
5924b74c
TH		 401 case HDIO_GET_IDENTITY:
402 return ata_get_identity(scsidev, arg);
403
b095518e
JG		 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
1da177e4
LT		 414 default:
415 rc = -ENOTTY;
416 break;
417 }
418
1da177e4
LT		 419 return rc;
420}
421
422/**
423 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 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:
cca3974e 437 * spin_lock_irqsave(host lock)
1da177e4
LT		 438 *
439 * RETURNS:
440 * Command allocated, or %NULL if none available.
441 */
7102d230
AB		 442static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
443 struct scsi_cmnd *cmd,
444 void (*done)(struct scsi_cmnd *))
1da177e4
LT		 445{
446 struct ata_queued_cmd *qc;
447
3373efd8 448 qc = ata_qc_new_init(dev);
1da177e4
LT		 449 if (qc) {
450 qc->scsicmd = cmd;
451 qc->scsidone = done;
452
e10b8c3f
BH		 453 qc->__sg = (struct scatterlist *) cmd->request_buffer;
454 qc->n_elem = cmd->use_sg;
1da177e4
LT		 455 } else {
456 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
457 done(cmd);
458 }
459
460 return qc;
461}
462
b095518e
JG		 463/**
464 * ata_dump_status - user friendly display of error info
465 * @id: id of the port in question
466 * @tf: ptr to filled out taskfile
467 *
468 * Decode and dump the ATA error/status registers for the user so
469 * that they have some idea what really happened at the non
470 * make-believe layer.
471 *
472 * LOCKING:
473 * inherited from caller
474 */
7102d230 475static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 476{
477 u8 stat = tf->command, err = tf->feature;
478
479 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
480 if (stat & ATA_BUSY) {
481 printk("Busy }\n"); /* Data is not valid in this case */
482 } else {
483 if (stat & 0x40) printk("DriveReady ");
484 if (stat & 0x20) printk("DeviceFault ");
485 if (stat & 0x10) printk("SeekComplete ");
486 if (stat & 0x08) printk("DataRequest ");
487 if (stat & 0x04) printk("CorrectedError ");
488 if (stat & 0x02) printk("Index ");
489 if (stat & 0x01) printk("Error ");
490 printk("}\n");
491
492 if (err) {
493 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
494 if (err & 0x04) printk("DriveStatusError ");
495 if (err & 0x80) {
496 if (err & 0x04) printk("BadCRC ");
497 else printk("Sector ");
498 }
499 if (err & 0x40) printk("UncorrectableError ");
500 if (err & 0x10) printk("SectorIdNotFound ");
501 if (err & 0x02) printk("TrackZeroNotFound ");
502 if (err & 0x01) printk("AddrMarkNotFound ");
503 printk("}\n");
504 }
505 }
506}
507
1da177e4
LT		 508/**
509 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 510 * @id: ATA device number
1da177e4 511 * @drv_stat: value contained in ATA status register
b095518e
JG		 512 * @drv_err: value contained in ATA error register
513 * @sk: the sense key we'll fill out
514 * @asc: the additional sense code we'll fill out
515 * @ascq: the additional sense code qualifier we'll fill out
246619da 516 * @verbose: be verbose
1da177e4 517 *
b095518e
JG		 518 * Converts an ATA error into a SCSI error. Fill out pointers to
519 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
520 * format sense blocks.
1da177e4
LT		 521 *
522 * LOCKING:
cca3974e 523 * spin_lock_irqsave(host lock)
1da177e4 524 */
7102d230
AB		 525static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
526 u8 *asc, u8 *ascq, int verbose)
1da177e4 527{
b095518e 528 int i;
ffe75ef6 529
1da177e4 530 /* Based on the 3ware driver translation table */
98ac62de 531 static const unsigned char sense_table[][4] = {
1da177e4
LT		 532 /* BBD|ECC|ID|MAR */
533 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
534 /* BBD|ECC|ID */
535 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
536 /* ECC|MC|MARK */
537 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
538 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
539 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
540 /* MC|ID|ABRT|TRK0|MARK */
541 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
542 /* MCR|MARK */
543 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
544 /* Bad address mark */
545 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
546 /* TRK0 */
547 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
548 /* Abort & !ICRC */
549 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
550 /* Media change request */
551 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
552 /* SRV */
553 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
554 /* Media change */
555 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
556 /* ECC */
557 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
558 /* BBD - block marked bad */
559 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
560 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
561 };
98ac62de 562 static const unsigned char stat_table[][4] = {
1da177e4
LT		 563 /* Must be first because BUSY means no other bits valid */
564 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
565 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
566 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
567 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
568 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
569 };
1da177e4 570
1da177e4
LT		 571 /*
572 * Is this an error we can process/parse
573 */
b095518e
JG		 574 if (drv_stat & ATA_BUSY) {
575 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 576 }
b095518e
JG		 577
578 if (drv_err) {
579 /* Look for drv_err */
580 for (i = 0; sense_table[i][0] != 0xFF; i++) {
581 /* Look for best matches first */
2e9edbf8 582 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 583 sense_table[i][0]) {
584 *sk = sense_table[i][1];
585 *asc = sense_table[i][2];
586 *ascq = sense_table[i][3];
587 goto translate_done;
588 }
589 }
590 /* No immediate match */
246619da
TH		 591 if (verbose)
592 printk(KERN_WARNING "ata%u: no sense translation for "
593 "error 0x%02x\n", id, drv_err);
1da177e4 594 }
b095518e
JG		 595
596 /* Fall back to interpreting status bits */
597 for (i = 0; stat_table[i][0] != 0xFF; i++) {
598 if (stat_table[i][0] & drv_stat) {
599 *sk = stat_table[i][1];
600 *asc = stat_table[i][2];
601 *ascq = stat_table[i][3];
602 goto translate_done;
1da177e4 603 }
b095518e
JG		 604 }
605 /* No error? Undecoded? */
246619da
TH		 606 if (verbose)
607 printk(KERN_WARNING "ata%u: no sense translation for "
608 "status: 0x%02x\n", id, drv_stat);
b095518e 609
2d202024
AC		 610 /* We need a sensible error return here, which is tricky, and one
611 that won't cause people to do things like return a disk wrongly */
612 *sk = ABORTED_COMMAND;
613 *asc = 0x00;
614 *ascq = 0x00;
b095518e
JG		 615
616 translate_done:
246619da
TH		 617 if (verbose)
618 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
619 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
620 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 621 return;
622}
623
624/*
750426aa 625 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 626 * @qc: Command that completed.
627 *
628 * This function is specific to the ATA descriptor format sense
629 * block specified for the ATA pass through commands. Regardless
630 * of whether the command errored or not, return a sense
631 * block. Copy all controller registers into the sense
632 * block. Clear sense key, ASC & ASCQ if there is no error.
633 *
634 * LOCKING:
750426aa 635 * None.
b095518e 636 */
750426aa 637static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 638{
639 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 640 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 641 unsigned char *sb = cmd->sense_buffer;
642 unsigned char *desc = sb + 8;
246619da 643 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 644
645 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
646
0e5dec47 647 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 648
b095518e
JG		 649 /*
650 * Use ata_to_sense_error() to map status register bits
651 * onto sense key, asc & ascq.
652 */
058e55e1
TH		 653 if (qc->err_mask ||
654 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 655 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 656 &sb[1], &sb[2], &sb[3], verbose);
b095518e 657 sb[1] &= 0x0f;
1da177e4
LT		 658 }
659
b095518e
JG		 660 /*
661 * Sense data is current and format is descriptor.
662 */
663 sb[0] = 0x72;
1da177e4 664
b095518e
JG		 665 desc[0] = 0x09;
666
f38621b3
TH		 667 /* set length of additional sense data */
668 sb[7] = 14;
669 desc[1] = 12;
b095518e
JG		 670
671 /*
672 * Copy registers into sense buffer.
673 */
674 desc[2] = 0x00;
675 desc[3] = tf->feature; /* == error reg */
676 desc[5] = tf->nsect;
677 desc[7] = tf->lbal;
678 desc[9] = tf->lbam;
679 desc[11] = tf->lbah;
680 desc[12] = tf->device;
681 desc[13] = tf->command; /* == status reg */
682
683 /*
684 * Fill in Extend bit, and the high order bytes
685 * if applicable.
686 */
687 if (tf->flags & ATA_TFLAG_LBA48) {
688 desc[2] |= 0x01;
689 desc[4] = tf->hob_nsect;
690 desc[6] = tf->hob_lbal;
691 desc[8] = tf->hob_lbam;
692 desc[10] = tf->hob_lbah;
1da177e4 693 }
b095518e 694}
1da177e4 695
b095518e 696/**
750426aa 697 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 698 * @qc: Command that we are erroring out
699 *
d25614ba
TH		 700 * Generate sense block for a failed ATA command @qc. Descriptor
701 * format is used to accomodate LBA48 block address.
b095518e
JG		 702 *
703 * LOCKING:
750426aa 704 * None.
b095518e 705 */
750426aa 706static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 707{
d25614ba 708 struct ata_device *dev = qc->dev;
b095518e 709 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 710 struct ata_taskfile *tf = &qc->result_tf;
b095518e 711 unsigned char *sb = cmd->sense_buffer;
d25614ba 712 unsigned char *desc = sb + 8;
246619da 713 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 714 u64 block;
b095518e
JG		 715
716 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
717
0e5dec47 718 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 719
d25614ba
TH		 720 /* sense data is current and format is descriptor */
721 sb[0] = 0x72;
722
723 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 724 * onto sense key, asc & ascq.
725 */
058e55e1
TH		 726 if (qc->err_mask ||
727 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 728 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 729 &sb[1], &sb[2], &sb[3], verbose);
730 sb[1] &= 0x0f;
1da177e4 731 }
1da177e4 732
d25614ba 733 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 734
d25614ba
TH		 735 /* information sense data descriptor */
736 sb[7] = 12;
737 desc[0] = 0x00;
738 desc[1] = 10;
a7dac447 739
d25614ba
TH		 740 desc[2] |= 0x80; /* valid */
741 desc[6] = block >> 40;
742 desc[7] = block >> 32;
743 desc[8] = block >> 24;
744 desc[9] = block >> 16;
745 desc[10] = block >> 8;
746 desc[11] = block;
1da177e4
LT		 747}
748
a6cce2a7
BK		 749static void ata_scsi_sdev_config(struct scsi_device *sdev)
750{
751 sdev->use_10_for_rw = 1;
752 sdev->use_10_for_ms = 1;
753}
754
755static void ata_scsi_dev_config(struct scsi_device *sdev,
756 struct ata_device *dev)
757{
914ed354
TH		 758 /* configure max sectors */
759 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 760
914ed354 761 /* SATA DMA transfers must be multiples of 4 byte, so
a6cce2a7
BK		 762 * we need to pad ATAPI transfers using an extra sg.
763 * Decrement max hw segments accordingly.
764 */
765 if (dev->class == ATA_DEV_ATAPI) {
165125e1 766 struct request_queue *q = sdev->request_queue;
a6cce2a7
BK		 767 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
768 }
a6e6ce8e
TH		 769
770 if (dev->flags & ATA_DFLAG_NCQ) {
771 int depth;
772
773 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
774 depth = min(ATA_MAX_QUEUE - 1, depth);
775 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
776 }
a6cce2a7
BK		 777}
778
1da177e4
LT		 779/**
780 * ata_scsi_slave_config - Set SCSI device attributes
781 * @sdev: SCSI device to examine
782 *
783 * This is called before we actually start reading
784 * and writing to the device, to configure certain
785 * SCSI mid-layer behaviors.
786 *
787 * LOCKING:
788 * Defined by SCSI layer. We don't really care.
789 */
790
791int ata_scsi_slave_config(struct scsi_device *sdev)
792{
31534363
TH		 793 struct ata_port *ap = ata_shost_to_port(sdev->host);
794 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
795
a6cce2a7 796 ata_scsi_sdev_config(sdev);
1da177e4
LT		 797
798 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
799
9666f400
TH		 800 sdev->manage_start_stop = 1;
801
31534363 802 if (dev)
a6cce2a7 803 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 804
805 return 0; /* scsi layer doesn't check return value, sigh */
806}
807
83c47bcb
TH		 808/**
809 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
810 * @sdev: SCSI device to be destroyed
811 *
812 * @sdev is about to be destroyed for hot/warm unplugging. If
813 * this unplugging was initiated by libata as indicated by NULL
814 * dev->sdev, this function doesn't have to do anything.
815 * Otherwise, SCSI layer initiated warm-unplug is in progress.
816 * Clear dev->sdev, schedule the device for ATA detach and invoke
817 * EH.
818 *
819 * LOCKING:
820 * Defined by SCSI layer. We don't really care.
821 */
822void ata_scsi_slave_destroy(struct scsi_device *sdev)
823{
824 struct ata_port *ap = ata_shost_to_port(sdev->host);
825 unsigned long flags;
826 struct ata_device *dev;
827
828 if (!ap->ops->error_handler)
829 return;
830
ba6a1308 831 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 832 dev = __ata_scsi_find_dev(ap, sdev);
833 if (dev && dev->sdev) {
834 /* SCSI device already in CANCEL state, no need to offline it */
835 dev->sdev = NULL;
836 dev->flags |= ATA_DFLAG_DETACH;
837 ata_port_schedule_eh(ap);
838 }
ba6a1308 839 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 840}
841
a6e6ce8e
TH		 842/**
843 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
844 * @sdev: SCSI device to configure queue depth for
845 * @queue_depth: new queue depth
846 *
847 * This is libata standard hostt->change_queue_depth callback.
848 * SCSI will call into this callback when user tries to set queue
849 * depth via sysfs.
850 *
851 * LOCKING:
852 * SCSI layer (we don't care)
853 *
854 * RETURNS:
855 * Newly configured queue depth.
856 */
857int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
858{
859 struct ata_port *ap = ata_shost_to_port(sdev->host);
860 struct ata_device *dev;
360f654e 861 unsigned long flags;
a6e6ce8e 862
c3c70c44 863 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 864 return sdev->queue_depth;
865
866 dev = ata_scsi_find_dev(ap, sdev);
867 if (!dev || !ata_dev_enabled(dev))
868 return sdev->queue_depth;
869
c3c70c44 870 /* NCQ enabled? */
360f654e 871 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 872 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
873 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 874 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 875 queue_depth = 1;
876 }
360f654e
TH		 877 spin_unlock_irqrestore(ap->lock, flags);
878
c3c70c44
TH		 879 /* limit and apply queue depth */
880 queue_depth = min(queue_depth, sdev->host->can_queue);
881 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
882 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
883
884 if (sdev->queue_depth == queue_depth)
885 return -EINVAL;
886
887 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 888 return queue_depth;
889}
890
d9aca22c 891/* XXX: for spindown warning */
da071b42
TH		 892static void ata_delayed_done_timerfn(unsigned long arg)
893{
894 struct scsi_cmnd *scmd = (void *)arg;
895
896 scmd->scsi_done(scmd);
897}
898
d9aca22c 899/* XXX: for spindown warning */
da071b42
TH		 900static void ata_delayed_done(struct scsi_cmnd *scmd)
901{
902 static struct timer_list timer;
903
904 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
905 mod_timer(&timer, jiffies + 5 * HZ);
906}
907
972dcafb
DG		 908/**
909 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
910 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 911 *
912 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
913 * (to start). Perhaps these commands should be preceded by
914 * CHECK POWER MODE to see what power mode the device is already in.
915 * [See SAT revision 5 at www.t10.org]
916 *
917 * LOCKING:
cca3974e 918 * spin_lock_irqsave(host lock)
972dcafb
DG		 919 *
920 * RETURNS:
921 * Zero on success, non-zero on error.
922 */
ad706991 923static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 924{
542b1444 925 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 926 struct ata_taskfile *tf = &qc->tf;
ad706991 927 const u8 *cdb = scmd->cmnd;
972dcafb 928
2e5704f6
TH		 929 if (scmd->cmd_len < 5)
930 goto invalid_fld;
931
972dcafb
DG		 932 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
933 tf->protocol = ATA_PROT_NODATA;
542b1444 934 if (cdb[1] & 0x1) {
972dcafb
DG		 935 ; /* ignore IMMED bit, violates sat-r05 */
936 }
542b1444 937 if (cdb[4] & 0x2)
ae006510 938 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 939 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 940 goto invalid_fld; /* power conditions not supported */
542b1444 941 if (cdb[4] & 0x1) {
972dcafb 942 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 943
944 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 945 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 946
947 tf->lbah = 0x0;
948 tf->lbam = 0x0;
949 tf->lbal = 0x0;
950 tf->device |= ATA_LBA;
951 } else {
952 /* CHS */
953 tf->lbal = 0x1; /* sect */
954 tf->lbam = 0x0; /* cyl low */
955 tf->lbah = 0x0; /* cyl high */
956 }
957
972dcafb 958 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10
TH		 959 } else {
960 /* XXX: This is for backward compatibility, will be
961 * removed. Read Documentation/feature-removal-schedule.txt
962 * for more info.
963 */
d9aca22c 964 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
920a4b10
TH		 965 (system_state == SYSTEM_HALT ||
966 system_state == SYSTEM_POWER_OFF)) {
da071b42 967 static unsigned long warned = 0;
920a4b10 968
da071b42 969 if (!test_and_set_bit(0, &warned)) {
920a4b10
TH		 970 ata_dev_printk(qc->dev, KERN_WARNING,
971 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
972 "UPDATE SHUTDOWN UTILITY\n");
973 ata_dev_printk(qc->dev, KERN_WARNING,
974 "For more info, visit "
975 "http://linux-ata.org/shutdown.html\n");
da071b42
TH		 976
977 /* ->scsi_done is not used, use it for
978 * delayed completion.
979 */
980 scmd->scsi_done = qc->scsidone;
981 qc->scsidone = ata_delayed_done;
920a4b10
TH		 982 }
983 scmd->result = SAM_STAT_GOOD;
984 return 1;
985 }
986
78981a7c
RH		 987 /* Issue ATA STANDBY IMMEDIATE command */
988 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 989 }
78981a7c 990
972dcafb
DG		 991 /*
992 * Standby and Idle condition timers could be implemented but that
993 * would require libata to implement the Power condition mode page
994 * and allow the user to change it. Changing mode pages requires
995 * MODE SELECT to be implemented.
996 */
997
998 return 0;
ae006510
DG		 999
1000invalid_fld:
542b1444 1001 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1002 /* "Invalid field in cbd" */
1003 return 1;
972dcafb
DG		 1004}
1005
1006
1da177e4
LT		 1007/**
1008 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1009 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1010 *
1011 * Sets up an ATA taskfile to issue FLUSH CACHE or
1012 * FLUSH CACHE EXT.
1013 *
1014 * LOCKING:
cca3974e 1015 * spin_lock_irqsave(host lock)
1da177e4
LT		 1016 *
1017 * RETURNS:
1018 * Zero on success, non-zero on error.
1019 */
ad706991 1020static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1021{
1022 struct ata_taskfile *tf = &qc->tf;
1023
1024 tf->flags |= ATA_TFLAG_DEVICE;
1025 tf->protocol = ATA_PROT_NODATA;
1026
6fc49adb 1027 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1028 tf->command = ATA_CMD_FLUSH_EXT;
1029 else
1030 tf->command = ATA_CMD_FLUSH;
1031
1032 return 0;
1033}
1034
3aef5231
AL		 1035/**
1036 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1037 * @cdb: SCSI command to translate
3aef5231
AL		 1038 *
1039 * Calculate LBA and transfer length for 6-byte commands.
1040 *
1041 * RETURNS:
1042 * @plba: the LBA
1043 * @plen: the transfer length
1044 */
542b1444 1045static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1046{
1047 u64 lba = 0;
6c7b7d2b 1048 u32 len;
3aef5231
AL		 1049
1050 VPRINTK("six-byte command\n");
1051
6c7b7d2b 1052 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1053 lba |= ((u64)cdb[2]) << 8;
1054 lba |= ((u64)cdb[3]);
3aef5231 1055
6c7b7d2b 1056 len = cdb[4];
3aef5231
AL		 1057
1058 *plba = lba;
1059 *plen = len;
1060}
1061
1062/**
1063 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1064 * @cdb: SCSI command to translate
3aef5231
AL		 1065 *
1066 * Calculate LBA and transfer length for 10-byte commands.
1067 *
1068 * RETURNS:
1069 * @plba: the LBA
1070 * @plen: the transfer length
1071 */
542b1444 1072static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1073{
1074 u64 lba = 0;
1075 u32 len = 0;
1076
1077 VPRINTK("ten-byte command\n");
1078
542b1444
TH		 1079 lba |= ((u64)cdb[2]) << 24;
1080 lba |= ((u64)cdb[3]) << 16;
1081 lba |= ((u64)cdb[4]) << 8;
1082 lba |= ((u64)cdb[5]);
3aef5231 1083
542b1444
TH		 1084 len |= ((u32)cdb[7]) << 8;
1085 len |= ((u32)cdb[8]);
3aef5231
AL		 1086
1087 *plba = lba;
1088 *plen = len;
1089}
1090
1091/**
1092 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1093 * @cdb: SCSI command to translate
3aef5231
AL		 1094 *
1095 * Calculate LBA and transfer length for 16-byte commands.
1096 *
1097 * RETURNS:
1098 * @plba: the LBA
1099 * @plen: the transfer length
1100 */
542b1444 1101static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1102{
1103 u64 lba = 0;
1104 u32 len = 0;
1105
1106 VPRINTK("sixteen-byte command\n");
1107
542b1444
TH		 1108 lba |= ((u64)cdb[2]) << 56;
1109 lba |= ((u64)cdb[3]) << 48;
1110 lba |= ((u64)cdb[4]) << 40;
1111 lba |= ((u64)cdb[5]) << 32;
1112 lba |= ((u64)cdb[6]) << 24;
1113 lba |= ((u64)cdb[7]) << 16;
1114 lba |= ((u64)cdb[8]) << 8;
1115 lba |= ((u64)cdb[9]);
3aef5231 1116
542b1444
TH		 1117 len |= ((u32)cdb[10]) << 24;
1118 len |= ((u32)cdb[11]) << 16;
1119 len |= ((u32)cdb[12]) << 8;
1120 len |= ((u32)cdb[13]);
3aef5231
AL		 1121
1122 *plba = lba;
1123 *plen = len;
1124}
1125
1da177e4
LT		 1126/**
1127 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1128 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1129 *
1130 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1131 *
1132 * LOCKING:
cca3974e 1133 * spin_lock_irqsave(host lock)
1da177e4
LT		 1134 *
1135 * RETURNS:
1136 * Zero on success, non-zero on error.
1137 */
ad706991 1138static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1139{
542b1444 1140 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1141 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1142 struct ata_device *dev = qc->dev;
1da177e4 1143 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1144 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1145 u64 block;
1146 u32 n_block;
1da177e4
LT		 1147
1148 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1149 tf->protocol = ATA_PROT_NODATA;
1da177e4 1150
2e5704f6
TH		 1151 if (cdb[0] == VERIFY) {
1152 if (scmd->cmd_len < 10)
1153 goto invalid_fld;
542b1444 1154 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1155 } else if (cdb[0] == VERIFY_16) {
1156 if (scmd->cmd_len < 16)
1157 goto invalid_fld;
542b1444 1158 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1159 } else
ae006510 1160 goto invalid_fld;
1da177e4 1161
8bf62ece 1162 if (!n_block)
ae006510 1163 goto nothing_to_do;
8bf62ece 1164 if (block >= dev_sectors)
ae006510 1165 goto out_of_range;
8bf62ece 1166 if ((block + n_block) > dev_sectors)
ae006510 1167 goto out_of_range;
1da177e4 1168
07506697
AL		 1169 if (dev->flags & ATA_DFLAG_LBA) {
1170 tf->flags |= ATA_TFLAG_LBA;
1171
c6a33e24
AL		 1172 if (lba_28_ok(block, n_block)) {
1173 /* use LBA28 */
1174 tf->command = ATA_CMD_VERIFY;
1175 tf->device |= (block >> 24) & 0xf;
1176 } else if (lba_48_ok(block, n_block)) {
1177 if (!(dev->flags & ATA_DFLAG_LBA48))
1178 goto out_of_range;
07506697
AL		 1179
1180 /* use LBA48 */
1181 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1182 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1183
8bf62ece 1184 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1185
8bf62ece
AL		 1186 tf->hob_lbah = (block >> 40) & 0xff;
1187 tf->hob_lbam = (block >> 32) & 0xff;
1188 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1189 } else
1190 /* request too large even for LBA48 */
1191 goto out_of_range;
8bf62ece
AL		 1192
1193 tf->nsect = n_block & 0xff;
1da177e4 1194
8bf62ece
AL		 1195 tf->lbah = (block >> 16) & 0xff;
1196 tf->lbam = (block >> 8) & 0xff;
1197 tf->lbal = block & 0xff;
1da177e4 1198
8bf62ece
AL		 1199 tf->device |= ATA_LBA;
1200 } else {
1201 /* CHS */
1202 u32 sect, head, cyl, track;
1203
c6a33e24
AL		 1204 if (!lba_28_ok(block, n_block))
1205 goto out_of_range;
07506697 1206
8bf62ece
AL		 1207 /* Convert LBA to CHS */
1208 track = (u32)block / dev->sectors;
1209 cyl = track / dev->heads;
1210 head = track % dev->heads;
1211 sect = (u32)block % dev->sectors + 1;
1212
c187c4b5
AL		 1213 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1214 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1215
1216 /* Check whether the converted CHS can fit.
1217 Cylinder: 0-65535
8bf62ece
AL		 1218 Head: 0-15
1219 Sector: 1-255*/
2e9edbf8 1220 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1221 goto out_of_range;
2e9edbf8 1222
8bf62ece
AL		 1223 tf->command = ATA_CMD_VERIFY;
1224 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1225 tf->lbal = sect;
1226 tf->lbam = cyl;
1227 tf->lbah = cyl >> 8;
1228 tf->device |= head;
1229 }
1da177e4
LT		 1230
1231 return 0;
ae006510
DG		 1232
1233invalid_fld:
542b1444 1234 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1235 /* "Invalid field in cbd" */
1236 return 1;
1237
1238out_of_range:
542b1444 1239 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1240 /* "Logical Block Address out of range" */
1241 return 1;
1242
1243nothing_to_do:
542b1444 1244 scmd->result = SAM_STAT_GOOD;
ae006510 1245 return 1;
1da177e4
LT		 1246}
1247
1248/**
1249 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1250 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1251 *
1252 * Converts any of six SCSI read/write commands into the
1253 * ATA counterpart, including starting sector (LBA),
1254 * sector count, and taking into account the device's LBA48
1255 * support.
1256 *
1257 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1258 * %WRITE_16 are currently supported.
1259 *
1260 * LOCKING:
cca3974e 1261 * spin_lock_irqsave(host lock)
1da177e4
LT		 1262 *
1263 * RETURNS:
1264 * Zero on success, non-zero on error.
1265 */
ad706991 1266static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1267{
542b1444 1268 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1269 const u8 *cdb = scmd->cmnd;
bd056d7e 1270 unsigned int tf_flags = 0;
3aef5231
AL		 1271 u64 block;
1272 u32 n_block;
bd056d7e 1273 int rc;
1da177e4 1274
542b1444 1275 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1276 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1277
9a3dccc4 1278 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1279 switch (cdb[0]) {
3aef5231
AL		 1280 case READ_10:
1281 case WRITE_10:
2e5704f6
TH		 1282 if (unlikely(scmd->cmd_len < 10))
1283 goto invalid_fld;
542b1444
TH		 1284 scsi_10_lba_len(cdb, &block, &n_block);
1285 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1286 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1287 break;
1288 case READ_6:
1289 case WRITE_6:
2e5704f6
TH		 1290 if (unlikely(scmd->cmd_len < 6))
1291 goto invalid_fld;
542b1444 1292 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1293
1294 /* for 6-byte r/w commands, transfer length 0
1295 * means 256 blocks of data, not 0 block.
1296 */
76b2bf9b
JG		 1297 if (!n_block)
1298 n_block = 256;
3aef5231
AL		 1299 break;
1300 case READ_16:
1301 case WRITE_16:
2e5704f6
TH		 1302 if (unlikely(scmd->cmd_len < 16))
1303 goto invalid_fld;
542b1444
TH		 1304 scsi_16_lba_len(cdb, &block, &n_block);
1305 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1306 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1307 break;
1308 default:
8bf62ece 1309 DPRINTK("no-byte command\n");
ae006510 1310 goto invalid_fld;
1da177e4
LT		 1311 }
1312
8bf62ece
AL		 1313 /* Check and compose ATA command */
1314 if (!n_block)
c187c4b5
AL		 1315 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1316 * length 0 means transfer 0 block of data.
1317 * However, for ATA R/W commands, sector count 0 means
1318 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1319 *
1320 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1321 */
ae006510 1322 goto nothing_to_do;
1da177e4 1323
bd056d7e 1324 qc->flags |= ATA_QCFLAG_IO;
726f0785 1325 qc->nbytes = n_block * ATA_SECT_SIZE;
1da177e4 1326
bd056d7e
TH		 1327 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1328 qc->tag);
1329 if (likely(rc == 0))
1330 return 0;
ae006510 1331
bd056d7e
TH		 1332 if (rc == -ERANGE)
1333 goto out_of_range;
1334 /* treat all other errors as -EINVAL, fall through */
ae006510 1335invalid_fld:
542b1444 1336 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1337 /* "Invalid field in cbd" */
1338 return 1;
1339
1340out_of_range:
542b1444 1341 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1342 /* "Logical Block Address out of range" */
1343 return 1;
1344
1345nothing_to_do:
542b1444 1346 scmd->result = SAM_STAT_GOOD;
ae006510 1347 return 1;
1da177e4
LT		 1348}
1349
77853bf2 1350static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1351{
c31f571d 1352 struct ata_port *ap = qc->ap;
1da177e4 1353 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1354 u8 *cdb = cmd->cmnd;
a22e2eb0 1355 int need_sense = (qc->err_mask != 0);
b095518e 1356
3057ac3c 1357 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1358 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1359 * cache
1360 */
2c3d2a46
AL		 1361 if (ap->ops->error_handler && !need_sense) {
1362 switch (qc->tf.command) {
1363 case ATA_CMD_SET_FEATURES:
1364 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1365 (qc->tf.feature == SETFEATURES_WC_OFF)) {
9af5c9c9 1366 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
2c3d2a46
AL		 1367 ata_port_schedule_eh(ap);
1368 }
1369 break;
1370
1371 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1372 case ATA_CMD_SET_MULTI: /* multi_count changed */
9af5c9c9 1373 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
2c3d2a46
AL		 1374 ata_port_schedule_eh(ap);
1375 break;
1376 }
3057ac3c 1377 }
1378
b095518e
JG		 1379 /* For ATA pass thru (SAT) commands, generate a sense block if
1380 * user mandated it or if there's an error. Note that if we
1381 * generate because the user forced us to, a check condition
1382 * is generated and the ATA register values are returned
1383 * whether the command completed successfully or not. If there
1384 * was no error, SK, ASC and ASCQ will all be zero.
1385 */
a7dac447
JG		 1386 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1387 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1388 ata_gen_passthru_sense(qc);
b095518e
JG		 1389 } else {
1390 if (!need_sense) {
1391 cmd->result = SAM_STAT_GOOD;
1392 } else {
1393 /* TODO: decide which descriptor format to use
1394 * for 48b LBA devices and call that here
1395 * instead of the fixed desc, which is only
1396 * good for smaller LBA (and maybe CHS?)
1397 * devices.
1398 */
750426aa 1399 ata_gen_ata_sense(qc);
b095518e
JG		 1400 }
1401 }
1da177e4 1402
d9aca22c 1403 /* XXX: track spindown state for spindown skipping and warning */
13b8d09f
TH		 1404 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1405 qc->tf.command == ATA_CMD_STANDBYNOW1))
1406 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1407 else if (likely(system_state != SYSTEM_HALT &&
1408 system_state != SYSTEM_POWER_OFF))
1409 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1410
c31f571d 1411 if (need_sense && !ap->ops->error_handler)
44877b4e 1412 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1413
1414 qc->scsidone(cmd);
1415
77853bf2 1416 ata_qc_free(qc);
1da177e4
LT		 1417}
1418
3dc1d881
TH		 1419/**
1420 * ata_scmd_need_defer - Check whether we need to defer scmd
1421 * @dev: ATA device to which the command is addressed
1422 * @is_io: Is the command IO (and thus possibly NCQ)?
1423 *
1424 * NCQ and non-NCQ commands cannot run together. As upper layer
1425 * only knows the queue depth, we are responsible for maintaining
1426 * exclusion. This function checks whether a new command can be
1427 * issued to @dev.
1428 *
1429 * LOCKING:
cca3974e 1430 * spin_lock_irqsave(host lock)
3dc1d881
TH		 1431 *
1432 * RETURNS:
1433 * 1 if deferring is needed, 0 otherwise.
1434 */
1435static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1436{
9af5c9c9 1437 struct ata_link *link = dev->link;
fcf1bf15 1438 int is_ncq = is_io && ata_ncq_enabled(dev);
3dc1d881 1439
fcf1bf15 1440 if (is_ncq) {
9af5c9c9 1441 if (!ata_tag_valid(link->active_tag))
3dc1d881
TH		 1442 return 0;
1443 } else {
9af5c9c9 1444 if (!ata_tag_valid(link->active_tag) && !link->sactive)
3dc1d881
TH		 1445 return 0;
1446 }
1447 return 1;
1448}
1449
1da177e4
LT		 1450/**
1451 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1452 * @dev: ATA device to which the command is addressed
1453 * @cmd: SCSI command to execute
1454 * @done: SCSI command completion function
1455 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1456 *
1457 * Our ->queuecommand() function has decided that the SCSI
1458 * command issued can be directly translated into an ATA
1459 * command, rather than handled internally.
1460 *
1461 * This function sets up an ata_queued_cmd structure for the
1462 * SCSI command, and sends that ata_queued_cmd to the hardware.
1463 *
ae006510
DG		 1464 * The xlat_func argument (actor) returns 0 if ready to execute
1465 * ATA command, else 1 to finish translation. If 1 is returned
1466 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1467 * to be set reflecting an error condition or clean (early)
1468 * termination.
1469 *
1da177e4 1470 * LOCKING:
cca3974e 1471 * spin_lock_irqsave(host lock)
2115ea94
TH		 1472 *
1473 * RETURNS:
1474 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1475 * needs to be deferred.
1da177e4 1476 */
2115ea94
TH		 1477static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1478 void (*done)(struct scsi_cmnd *),
1479 ata_xlat_func_t xlat_func)
1da177e4
LT		 1480{
1481 struct ata_queued_cmd *qc;
3dc1d881 1482 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1483
1484 VPRINTK("ENTER\n");
1485
3dc1d881
TH		 1486 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1487 goto defer;
1488
3373efd8 1489 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1490 if (!qc)
ae006510 1491 goto err_mem;
1da177e4
LT		 1492
1493 /* data is present; dma-map it */
be7db055
CH		 1494 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1495 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1496 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1497 ata_dev_printk(dev, KERN_WARNING,
1498 "WARNING: zero len r/w req\n");
ae006510 1499 goto err_did;
1da177e4
LT		 1500 }
1501
e10b8c3f 1502 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1da177e4
LT		 1503
1504 qc->dma_dir = cmd->sc_data_direction;
1505 }
1506
1507 qc->complete_fn = ata_scsi_qc_complete;
1508
ad706991 1509 if (xlat_func(qc))
ae006510 1510 goto early_finish;
1da177e4
LT		 1511
1512 /* select device, send command to hardware */
8e0e694a 1513 ata_qc_issue(qc);
1da177e4
LT		 1514
1515 VPRINTK("EXIT\n");
2115ea94 1516 return 0;
1da177e4 1517
ae006510
DG		 1518early_finish:
1519 ata_qc_free(qc);
da071b42 1520 qc->scsidone(cmd);
ae006510 1521 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1522 return 0;
ae006510
DG		 1523
1524err_did:
1da177e4 1525 ata_qc_free(qc);
ae006510 1526 cmd->result = (DID_ERROR << 16);
da071b42 1527 qc->scsidone(cmd);
253b92ec 1528err_mem:
ae006510 1529 DPRINTK("EXIT - internal\n");
2115ea94 1530 return 0;
3dc1d881
TH		 1531
1532defer:
1533 DPRINTK("EXIT - defer\n");
1534 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1535}
1536
1537/**
1538 * ata_scsi_rbuf_get - Map response buffer.
1539 * @cmd: SCSI command containing buffer to be mapped.
1540 * @buf_out: Pointer to mapped area.
1541 *
1542 * Maps buffer contained within SCSI command @cmd.
1543 *
1544 * LOCKING:
cca3974e 1545 * spin_lock_irqsave(host lock)
1da177e4
LT		 1546 *
1547 * RETURNS:
1548 * Length of response buffer.
1549 */
1550
1551static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1552{
1553 u8 *buf;
1554 unsigned int buflen;
1555
e10b8c3f 1556 struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
1da177e4 1557
e10b8c3f 1558 if (sg) {
da02d2a1 1559 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1da177e4
LT		 1560 buflen = sg->length;
1561 } else {
e10b8c3f
BH		 1562 buf = NULL;
1563 buflen = 0;
1da177e4
LT		 1564 }
1565
1566 *buf_out = buf;
1567 return buflen;
1568}
1569
1570/**
1571 * ata_scsi_rbuf_put - Unmap response buffer.
1572 * @cmd: SCSI command containing buffer to be unmapped.
1573 * @buf: buffer to unmap
1574 *
1575 * Unmaps response buffer contained within @cmd.
1576 *
1577 * LOCKING:
cca3974e 1578 * spin_lock_irqsave(host lock)
1da177e4
LT		 1579 */
1580
1581static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1582{
e10b8c3f
BH		 1583 struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
1584 if (sg)
da02d2a1 1585 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1da177e4
LT		 1586}
1587
1588/**
1589 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1590 * @args: device IDENTIFY data / SCSI command of interest.
1591 * @actor: Callback hook for desired SCSI command simulator
1592 *
1593 * Takes care of the hard work of simulating a SCSI command...
1594 * Mapping the response buffer, calling the command's handler,
1595 * and handling the handler's return value. This return value
1596 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1597 * completed successfully (0), or not (in which case cmd->result
1598 * and sense buffer are assumed to be set).
1da177e4
LT		 1599 *
1600 * LOCKING:
cca3974e 1601 * spin_lock_irqsave(host lock)
1da177e4
LT		 1602 */
1603
1604void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1605 unsigned int (*actor) (struct ata_scsi_args *args,
1606 u8 *rbuf, unsigned int buflen))
1607{
1608 u8 *rbuf;
1609 unsigned int buflen, rc;
1610 struct scsi_cmnd *cmd = args->cmd;
1611
1612 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1613 memset(rbuf, 0, buflen);
1614 rc = actor(args, rbuf, buflen);
1615 ata_scsi_rbuf_put(cmd, rbuf);
1616
ae006510 1617 if (rc == 0)
1da177e4 1618 cmd->result = SAM_STAT_GOOD;
ae006510 1619 args->done(cmd);
1da177e4
LT		 1620}
1621
6a36261e
TH		 1622/**
1623 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1624 * @idx: byte index into SCSI response buffer
1625 * @val: value to set
1626 *
1627 * To be used by SCSI command simulator functions. This macros
1628 * expects two local variables, u8 *rbuf and unsigned int buflen,
1629 * are in scope.
1630 *
1631 * LOCKING:
1632 * None.
1633 */
1634#define ATA_SCSI_RBUF_SET(idx, val) do { \
1635 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1636 } while (0)
1637
1da177e4
LT		 1638/**
1639 * ata_scsiop_inq_std - Simulate INQUIRY command
1640 * @args: device IDENTIFY data / SCSI command of interest.
1641 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1642 * @buflen: Response buffer length.
1643 *
1644 * Returns standard device identification data associated
b142eb65 1645 * with non-VPD INQUIRY command output.
1da177e4
LT		 1646 *
1647 * LOCKING:
cca3974e 1648 * spin_lock_irqsave(host lock)
1da177e4
LT		 1649 */
1650
1651unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1652 unsigned int buflen)
1653{
1654 u8 hdr[] = {
1655 TYPE_DISK,
1656 0,
1657 0x5, /* claim SPC-3 version compatibility */
1658 2,
1659 95 - 4
1660 };
1661
1662 /* set scsi removeable (RMB) bit per ata bit */
1663 if (ata_id_removeable(args->id))
1664 hdr[1] |= (1 << 7);
1665
1666 VPRINTK("ENTER\n");
1667
1668 memcpy(rbuf, hdr, sizeof(hdr));
1669
1670 if (buflen > 35) {
1671 memcpy(&rbuf[8], "ATA ", 8);
a0cf733b
TH		 1672 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1673 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4
LT		 1674 if (rbuf[32] == 0 || rbuf[32] == ' ')
1675 memcpy(&rbuf[32], "n/a ", 4);
1676 }
1677
1678 if (buflen > 63) {
1679 const u8 versions[] = {
1680 0x60, /* SAM-3 (no version claimed) */
1681
1682 0x03,
1683 0x20, /* SBC-2 (no version claimed) */
1684
1685 0x02,
1686 0x60 /* SPC-3 (no version claimed) */
1687 };
1688
1689 memcpy(rbuf + 59, versions, sizeof(versions));
1690 }
1691
1692 return 0;
1693}
1694
1695/**
b142eb65 1696 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1697 * @args: device IDENTIFY data / SCSI command of interest.
1698 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1699 * @buflen: Response buffer length.
1700 *
b142eb65 1701 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1702 *
1703 * LOCKING:
cca3974e 1704 * spin_lock_irqsave(host lock)
1da177e4
LT		 1705 */
1706
1707unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1708 unsigned int buflen)
1709{
1710 const u8 pages[] = {
1711 0x00, /* page 0x00, this page */
1712 0x80, /* page 0x80, unit serial no page */
1713 0x83 /* page 0x83, device ident page */
1714 };
b142eb65 1715 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1716
1717 if (buflen > 6)
1718 memcpy(rbuf + 4, pages, sizeof(pages));
1719
1720 return 0;
1721}
1722
1723/**
b142eb65 1724 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1725 * @args: device IDENTIFY data / SCSI command of interest.
1726 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1727 * @buflen: Response buffer length.
1728 *
1729 * Returns ATA device serial number.
1730 *
1731 * LOCKING:
cca3974e 1732 * spin_lock_irqsave(host lock)
1da177e4
LT		 1733 */
1734
1735unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1736 unsigned int buflen)
1737{
1738 const u8 hdr[] = {
1739 0,
1740 0x80, /* this page code */
1741 0,
a0cf733b 1742 ATA_ID_SERNO_LEN, /* page len */
1da177e4
LT		 1743 };
1744 memcpy(rbuf, hdr, sizeof(hdr));
1745
a0cf733b 1746 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
6a62a04d 1747 ata_id_string(args->id, (unsigned char *) &rbuf[4],
a0cf733b 1748 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 1749
1750 return 0;
1751}
1752
1da177e4 1753/**
b142eb65 1754 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1755 * @args: device IDENTIFY data / SCSI command of interest.
1756 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1757 * @buflen: Response buffer length.
1758 *
b142eb65
JG		 1759 * Yields two logical unit device identification designators:
1760 * - vendor specific ASCII containing the ATA serial number
1761 * - SAT defined "t10 vendor id based" containing ASCII vendor
1762 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1763 *
1764 * LOCKING:
cca3974e 1765 * spin_lock_irqsave(host lock)
1da177e4
LT		 1766 */
1767
1768unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1769 unsigned int buflen)
1770{
b142eb65
JG		 1771 int num;
1772 const int sat_model_serial_desc_len = 68;
1da177e4 1773
b142eb65
JG		 1774 rbuf[1] = 0x83; /* this page code */
1775 num = 4;
1776
a0cf733b 1777 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
b142eb65 1778 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1779 rbuf[num + 0] = 2;
a0cf733b 1780 rbuf[num + 3] = ATA_ID_SERNO_LEN;
b142eb65
JG		 1781 num += 4;
1782 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1783 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1784 num += ATA_ID_SERNO_LEN;
1da177e4 1785 }
b142eb65
JG		 1786 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1787 /* SAT defined lu model and serial numbers descriptor */
1788 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1789 rbuf[num + 0] = 2;
1790 rbuf[num + 1] = 1;
b142eb65
JG		 1791 rbuf[num + 3] = sat_model_serial_desc_len;
1792 num += 4;
1793 memcpy(rbuf + num, "ATA ", 8);
1794 num += 8;
1795 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1796 ATA_ID_PROD, ATA_ID_PROD_LEN);
1797 num += ATA_ID_PROD_LEN;
b142eb65 1798 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1799 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1800 num += ATA_ID_SERNO_LEN;
b142eb65
JG		 1801 }
1802 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1803 return 0;
1804}
1805
1806/**
0cba632b 1807 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1808 * @args: device IDENTIFY data / SCSI command of interest.
1809 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1810 * @buflen: Response buffer length.
1811 *
1812 * No operation. Simply returns success to caller, to indicate
1813 * that the caller should successfully complete this SCSI command.
1814 *
1815 * LOCKING:
cca3974e 1816 * spin_lock_irqsave(host lock)
1da177e4
LT		 1817 */
1818
1819unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1820 unsigned int buflen)
1821{
1822 VPRINTK("ENTER\n");
1823 return 0;
1824}
1825
1826/**
1827 * ata_msense_push - Push data onto MODE SENSE data output buffer
1828 * @ptr_io: (input/output) Location to store more output data
1829 * @last: End of output data buffer
1830 * @buf: Pointer to BLOB being added to output buffer
1831 * @buflen: Length of BLOB
1832 *
1833 * Store MODE SENSE data on an output buffer.
1834 *
1835 * LOCKING:
1836 * None.
1837 */
1838
1839static void ata_msense_push(u8 **ptr_io, const u8 *last,
1840 const u8 *buf, unsigned int buflen)
1841{
1842 u8 *ptr = *ptr_io;
1843
1844 if ((ptr + buflen - 1) > last)
1845 return;
1846
1847 memcpy(ptr, buf, buflen);
1848
1849 ptr += buflen;
1850
1851 *ptr_io = ptr;
1852}
1853
1854/**
1855 * ata_msense_caching - Simulate MODE SENSE caching info page
1856 * @id: device IDENTIFY data
1857 * @ptr_io: (input/output) Location to store more output data
1858 * @last: End of output data buffer
1859 *
1860 * Generate a caching info page, which conditionally indicates
1861 * write caching to the SCSI layer, depending on device
1862 * capabilities.
1863 *
1864 * LOCKING:
1865 * None.
1866 */
1867
1868static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1869 const u8 *last)
1870{
00ac37f5 1871 u8 page[CACHE_MPAGE_LEN];
1da177e4 1872
00ac37f5 1873 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1874 if (ata_id_wcache_enabled(id))
1875 page[2] |= (1 << 2); /* write cache enable */
1876 if (!ata_id_rahead_enabled(id))
1877 page[12] |= (1 << 5); /* disable read ahead */
1878
1879 ata_msense_push(ptr_io, last, page, sizeof(page));
1880 return sizeof(page);
1881}
1882
1883/**
1884 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1885 * @dev: Device associated with this MODE SENSE command
1886 * @ptr_io: (input/output) Location to store more output data
1887 * @last: End of output data buffer
1888 *
1889 * Generate a generic MODE SENSE control mode page.
1890 *
1891 * LOCKING:
1892 * None.
1893 */
1894
1895static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1896{
00ac37f5
DG		 1897 ata_msense_push(ptr_io, last, def_control_mpage,
1898 sizeof(def_control_mpage));
1899 return sizeof(def_control_mpage);
1da177e4
LT		 1900}
1901
1902/**
1903 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1904 * @dev: Device associated with this MODE SENSE command
1905 * @ptr_io: (input/output) Location to store more output data
1906 * @last: End of output data buffer
1907 *
1908 * Generate a generic MODE SENSE r/w error recovery page.
1909 *
1910 * LOCKING:
1911 * None.
1912 */
1913
1914static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1915{
1da177e4 1916
00ac37f5
DG		 1917 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1918 sizeof(def_rw_recovery_mpage));
1919 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1920}
1921
48bdc8ec
JA		 1922/*
1923 * We can turn this into a real blacklist if it's needed, for now just
1924 * blacklist any Maxtor BANC1G10 revision firmware
1925 */
1926static int ata_dev_supports_fua(u16 *id)
1927{
a0cf733b 1928 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 1929
c3c013a2
JG		 1930 if (!libata_fua)
1931 return 0;
48bdc8ec
JA		 1932 if (!ata_id_has_fua(id))
1933 return 0;
1934
a0cf733b
TH		 1935 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1936 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 1937
2e02671d 1938 if (strcmp(model, "Maxtor"))
48bdc8ec 1939 return 1;
2e02671d 1940 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 1941 return 1;
1942
1943 return 0; /* blacklisted */
1944}
1945
1da177e4
LT		 1946/**
1947 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1948 * @args: device IDENTIFY data / SCSI command of interest.
1949 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1950 * @buflen: Response buffer length.
1951 *
00ac37f5
DG		 1952 * Simulate MODE SENSE commands. Assume this is invoked for direct
1953 * access devices (e.g. disks) only. There should be no block
1954 * descriptor for other device types.
1da177e4
LT		 1955 *
1956 * LOCKING:
cca3974e 1957 * spin_lock_irqsave(host lock)
1da177e4
LT		 1958 */
1959
1960unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1961 unsigned int buflen)
1962{
9a3dccc4 1963 struct ata_device *dev = args->dev;
1da177e4 1964 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 1965 const u8 sat_blk_desc[] = {
1966 0, 0, 0, 0, /* number of blocks: sat unspecified */
1967 0,
1968 0, 0x2, 0x0 /* block length: 512 bytes */
1969 };
1970 u8 pg, spg;
1971 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 1972 u8 dpofua;
1da177e4
LT		 1973
1974 VPRINTK("ENTER\n");
1975
1976 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 1977 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1978 /*
1979 * LLBA bit in msense(10) ignored (compliant)
1da177e4 1980 */
00ac37f5 1981
1da177e4 1982 page_control = scsicmd[2] >> 6;
ae006510
DG		 1983 switch (page_control) {
1984 case 0: /* current */
1985 break; /* supported */
1986 case 3: /* saved */
1987 goto saving_not_supp;
1988 case 1: /* changeable */
1989 case 2: /* defaults */
1990 default:
1991 goto invalid_fld;
1992 }
1da177e4 1993
00ac37f5
DG		 1994 if (six_byte) {
1995 output_len = 4 + (ebd ? 8 : 0);
1996 alloc_len = scsicmd[4];
1997 } else {
1998 output_len = 8 + (ebd ? 8 : 0);
1999 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2000 }
2001 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2002
2003 p = rbuf + output_len;
00ac37f5 2004 last = rbuf + minlen - 1;
1da177e4 2005
00ac37f5
DG		 2006 pg = scsicmd[2] & 0x3f;
2007 spg = scsicmd[3];
2008 /*
2009 * No mode subpages supported (yet) but asking for _all_
2010 * subpages may be valid
2011 */
2012 if (spg && (spg != ALL_SUB_MPAGES))
2013 goto invalid_fld;
2014
2015 switch(pg) {
2016 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2017 output_len += ata_msense_rw_recovery(&p, last);
2018 break;
2019
00ac37f5 2020 case CACHE_MPAGE:
1da177e4
LT		 2021 output_len += ata_msense_caching(args->id, &p, last);
2022 break;
2023
00ac37f5 2024 case CONTROL_MPAGE: {
1da177e4
LT		 2025 output_len += ata_msense_ctl_mode(&p, last);
2026 break;
2027 }
2028
00ac37f5 2029 case ALL_MPAGES:
1da177e4
LT		 2030 output_len += ata_msense_rw_recovery(&p, last);
2031 output_len += ata_msense_caching(args->id, &p, last);
2032 output_len += ata_msense_ctl_mode(&p, last);
2033 break;
2034
2035 default: /* invalid page code */
ae006510 2036 goto invalid_fld;
1da177e4
LT		 2037 }
2038
00ac37f5
DG		 2039 if (minlen < 1)
2040 return 0;
9a3dccc4
TH		 2041
2042 dpofua = 0;
f79d409f 2043 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2044 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2045 dpofua = 1 << 4;
2046
1da177e4
LT		 2047 if (six_byte) {
2048 output_len--;
2049 rbuf[0] = output_len;
9a3dccc4
TH		 2050 if (minlen > 2)
2051 rbuf[2] |= dpofua;
00ac37f5
DG		 2052 if (ebd) {
2053 if (minlen > 3)
2054 rbuf[3] = sizeof(sat_blk_desc);
2055 if (minlen > 11)
2056 memcpy(rbuf + 4, sat_blk_desc,
2057 sizeof(sat_blk_desc));
2058 }
1da177e4
LT		 2059 } else {
2060 output_len -= 2;
2061 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2062 if (minlen > 1)
2063 rbuf[1] = output_len;
9a3dccc4
TH		 2064 if (minlen > 3)
2065 rbuf[3] |= dpofua;
00ac37f5
DG		 2066 if (ebd) {
2067 if (minlen > 7)
2068 rbuf[7] = sizeof(sat_blk_desc);
2069 if (minlen > 15)
2070 memcpy(rbuf + 8, sat_blk_desc,
2071 sizeof(sat_blk_desc));
2072 }
1da177e4 2073 }
1da177e4 2074 return 0;
ae006510
DG		 2075
2076invalid_fld:
2077 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2078 /* "Invalid field in cbd" */
2079 return 1;
2080
2081saving_not_supp:
2082 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2083 /* "Saving parameters not supported" */
2084 return 1;
1da177e4
LT		 2085}
2086
2087/**
2088 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2089 * @args: device IDENTIFY data / SCSI command of interest.
2090 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2091 * @buflen: Response buffer length.
2092 *
2093 * Simulate READ CAPACITY commands.
2094 *
2095 * LOCKING:
6a36261e 2096 * None.
1da177e4 2097 */
1da177e4
LT		 2098unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2099 unsigned int buflen)
2100{
6a36261e 2101 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2102
2103 VPRINTK("ENTER\n");
2104
1da177e4 2105 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2106 if (last_lba >= 0xffffffffULL)
2107 last_lba = 0xffffffff;
0c144d0d 2108
1da177e4 2109 /* sector count, 32-bit */
6a36261e
TH		 2110 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2111 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2112 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2113 ATA_SCSI_RBUF_SET(3, last_lba);
1da177e4
LT		 2114
2115 /* sector size */
6a36261e
TH		 2116 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2117 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
1da177e4
LT		 2118 } else {
2119 /* sector count, 64-bit */
6a36261e
TH		 2120 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2121 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2122 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2123 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2124 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2125 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2126 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2127 ATA_SCSI_RBUF_SET(7, last_lba);
1da177e4
LT		 2128
2129 /* sector size */
6a36261e
TH		 2130 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2131 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
1da177e4
LT		 2132 }
2133
2134 return 0;
2135}
2136
2137/**
2138 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2139 * @args: device IDENTIFY data / SCSI command of interest.
2140 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2141 * @buflen: Response buffer length.
2142 *
2143 * Simulate REPORT LUNS command.
2144 *
2145 * LOCKING:
cca3974e 2146 * spin_lock_irqsave(host lock)
1da177e4
LT		 2147 */
2148
2149unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2150 unsigned int buflen)
2151{
2152 VPRINTK("ENTER\n");
2153 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2154
2155 return 0;
2156}
2157
845c5834
DG		 2158/**
2159 * ata_scsi_set_sense - Set SCSI sense data and status
2160 * @cmd: SCSI request to be handled
2161 * @sk: SCSI-defined sense key
2162 * @asc: SCSI-defined additional sense code
2163 * @ascq: SCSI-defined additional sense code qualifier
2164 *
2165 * Helper function that builds a valid fixed format, current
2166 * response code and the given sense key (sk), additional sense
2167 * code (asc) and additional sense code qualifier (ascq) with
2168 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2169 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2170 *
2171 * LOCKING:
2172 * Not required
2173 */
2174
2175void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2176{
2177 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2178
2179 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2180 cmd->sense_buffer[2] = sk;
2181 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2182 cmd->sense_buffer[12] = asc;
2183 cmd->sense_buffer[13] = ascq;
2184}
2185
1da177e4
LT		 2186/**
2187 * ata_scsi_badcmd - End a SCSI request with an error
2188 * @cmd: SCSI request to be handled
2189 * @done: SCSI command completion function
2190 * @asc: SCSI-defined additional sense code
2191 * @ascq: SCSI-defined additional sense code qualifier
2192 *
2193 * Helper function that completes a SCSI command with
2194 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2195 * and the specified additional sense codes.
2196 *
2197 * LOCKING:
cca3974e 2198 * spin_lock_irqsave(host lock)
1da177e4
LT		 2199 */
2200
2201void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2202{
2203 DPRINTK("ENTER\n");
ae006510 2204 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2205
2206 done(cmd);
2207}
2208
77853bf2 2209static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2210{
74e6c8c3 2211 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2212 /* FIXME: not quite right; we don't want the
2213 * translation of taskfile registers into
2214 * a sense descriptors, since that's only
2215 * correct for ATA, not ATAPI
2216 */
750426aa 2217 ata_gen_passthru_sense(qc);
74e6c8c3 2218 }
a939c963 2219
c6e6e666 2220 qc->scsidone(qc->scsicmd);
77853bf2 2221 ata_qc_free(qc);
c6e6e666 2222}
a939c963 2223
c6e6e666
JG		 2224/* is it pointless to prefer PIO for "safety reasons"? */
2225static inline int ata_pio_use_silly(struct ata_port *ap)
2226{
2227 return (ap->flags & ATA_FLAG_PIO_DMA);
2228}
2229
2230static void atapi_request_sense(struct ata_queued_cmd *qc)
2231{
2232 struct ata_port *ap = qc->ap;
2233 struct scsi_cmnd *cmd = qc->scsicmd;
2234
2235 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2236
2237 /* FIXME: is this needed? */
2238 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2239
c6e6e666
JG		 2240 ap->ops->tf_read(ap, &qc->tf);
2241
2242 /* fill these in, for the case where they are -not- overwritten */
2243 cmd->sense_buffer[0] = 0x70;
2244 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2245
2246 ata_qc_reinit(qc);
2247
a939c963
JG		 2248 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2249 qc->dma_dir = DMA_FROM_DEVICE;
2250
6e7846e9 2251 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2252 qc->cdb[0] = REQUEST_SENSE;
2253 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2254
2255 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2256 qc->tf.command = ATA_CMD_PACKET;
2257
c6e6e666
JG		 2258 if (ata_pio_use_silly(ap)) {
2259 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2260 qc->tf.feature |= ATAPI_PKT_DMA;
2261 } else {
2262 qc->tf.protocol = ATA_PROT_ATAPI;
2263 qc->tf.lbam = (8 * 1024) & 0xff;
2264 qc->tf.lbah = (8 * 1024) >> 8;
2265 }
a939c963
JG		 2266 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2267
c6e6e666 2268 qc->complete_fn = atapi_sense_complete;
a939c963 2269
8e0e694a 2270 ata_qc_issue(qc);
a939c963
JG		 2271
2272 DPRINTK("EXIT\n");
2273}
2274
77853bf2 2275static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2276{
2277 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2278 unsigned int err_mask = qc->err_mask;
1da177e4 2279
a7dac447 2280 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2281
246619da
TH		 2282 /* handle completion from new EH */
2283 if (unlikely(qc->ap->ops->error_handler &&
2284 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2285
2286 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2287 /* FIXME: not quite right; we don't want the
2288 * translation of taskfile registers into a
2289 * sense descriptors, since that's only
2290 * correct for ATA, not ATAPI
2291 */
750426aa 2292 ata_gen_passthru_sense(qc);
246619da
TH		 2293 }
2294
22aac089
TH		 2295 /* SCSI EH automatically locks door if sdev->locked is
2296 * set. Sometimes door lock request continues to
2297 * fail, for example, when no media is present. This
2298 * creates a loop - SCSI EH issues door lock which
2299 * fails and gets invoked again to acquire sense data
2300 * for the failed command.
2301 *
2302 * If door lock fails, always clear sdev->locked to
2303 * avoid this infinite loop.
2304 */
2305 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2306 qc->dev->sdev->locked = 0;
2307
246619da
TH		 2308 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2309 qc->scsidone(cmd);
2310 ata_qc_free(qc);
2311 return;
2312 }
2313
2314 /* successful completion or old EH failure path */
a7dac447 2315 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2316 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2317 atapi_request_sense(qc);
77853bf2 2318 return;
74e6c8c3 2319 } else if (unlikely(err_mask)) {
a7dac447
JG		 2320 /* FIXME: not quite right; we don't want the
2321 * translation of taskfile registers into
2322 * a sense descriptors, since that's only
2323 * correct for ATA, not ATAPI
2324 */
750426aa 2325 ata_gen_passthru_sense(qc);
74e6c8c3 2326 } else {
1da177e4
LT		 2327 u8 *scsicmd = cmd->cmnd;
2328
fd71da46 2329 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2330 u8 *buf = NULL;
2331 unsigned int buflen;
2332
2333 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2334
2335 /* ATAPI devices typically report zero for their SCSI version,
2336 * and sometimes deviate from the spec WRT response data
2337 * format. If SCSI version is reported as zero like normal,
2338 * then we make the following fixups: 1) Fake MMC-5 version,
2339 * to indicate to the Linux scsi midlayer this is a modern
2340 * device. 2) Ensure response data format / ATAPI information
2341 * are always correct.
a15dbeb4
JG		 2342 */
2343 if (buf[2] == 0) {
2344 buf[2] = 0x5;
2345 buf[3] = 0x32;
2346 }
2347
1da177e4
LT		 2348 ata_scsi_rbuf_put(cmd, buf);
2349 }
a15dbeb4 2350
1da177e4
LT		 2351 cmd->result = SAM_STAT_GOOD;
2352 }
2353
2354 qc->scsidone(cmd);
77853bf2 2355 ata_qc_free(qc);
1da177e4
LT		 2356}
2357/**
2358 * atapi_xlat - Initialize PACKET taskfile
2359 * @qc: command structure to be initialized
1da177e4
LT		 2360 *
2361 * LOCKING:
cca3974e 2362 * spin_lock_irqsave(host lock)
1da177e4
LT		 2363 *
2364 * RETURNS:
2365 * Zero on success, non-zero on failure.
2366 */
ad706991 2367static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2368{
542b1444 2369 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4
LT		 2370 struct ata_device *dev = qc->dev;
2371 int using_pio = (dev->flags & ATA_DFLAG_PIO);
542b1444 2372 int nodata = (scmd->sc_data_direction == DMA_NONE);
1da177e4 2373
2e5704f6
TH		 2374 memset(qc->cdb, 0, dev->cdb_len);
2375 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2376
2377 qc->complete_fn = atapi_qc_complete;
2378
2379 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2380 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2381 qc->tf.flags |= ATA_TFLAG_WRITE;
2382 DPRINTK("direction: write\n");
2383 }
2384
2385 qc->tf.command = ATA_CMD_PACKET;
e00f1ff3
TH		 2386 qc->nbytes = scmd->request_bufflen;
2387
2388 /* check whether ATAPI DMA is safe */
2389 if (!using_pio && ata_check_atapi_dma(qc))
2390 using_pio = 1;
1da177e4 2391
1da177e4 2392 if (using_pio || nodata) {
e00f1ff3 2393 /* no data, or PIO data xfer */
1da177e4
LT		 2394 if (nodata)
2395 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2396 else
2397 qc->tf.protocol = ATA_PROT_ATAPI;
2398 qc->tf.lbam = (8 * 1024) & 0xff;
2399 qc->tf.lbah = (8 * 1024) >> 8;
e00f1ff3
TH		 2400 } else {
2401 /* DMA data xfer */
1da177e4
LT		 2402 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2403 qc->tf.feature |= ATAPI_PKT_DMA;
2404
542b1444 2405 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2406 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2407 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2408 }
2409
1da177e4
LT		 2410 return 0;
2411}
2412
41bda9c9 2413static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2414{
41bda9c9
TH		 2415 if (ap->nr_pmp_links == 0) {
2416 if (likely(devno < ata_link_max_devices(&ap->link)))
2417 return &ap->link.device[devno];
2418 } else {
2419 if (likely(devno < ap->nr_pmp_links))
2420 return &ap->pmp_link[devno].device[0];
2421 }
2422
ab5b3a5b
TH		 2423 return NULL;
2424}
2425
2426static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2427 const struct scsi_device *scsidev)
2428{
41bda9c9
TH		 2429 int devno;
2430
ab5b3a5b 2431 /* skip commands not addressed to targets we simulate */
41bda9c9
TH		 2432 if (ap->nr_pmp_links == 0) {
2433 if (unlikely(scsidev->channel || scsidev->lun))
2434 return NULL;
2435 devno = scsidev->id;
2436 } else {
2437 if (unlikely(scsidev->id || scsidev->lun))
2438 return NULL;
2439 devno = scsidev->channel;
2440 }
ab5b3a5b 2441
41bda9c9 2442 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2443}
2444
99ba9e09
BK		 2445/**
2446 * ata_scsi_dev_enabled - determine if device is enabled
2447 * @dev: ATA device
2448 *
2449 * Determine if commands should be sent to the specified device.
2450 *
2451 * LOCKING:
cca3974e 2452 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2453 *
2454 * RETURNS:
2455 * 0 if commands are not allowed / 1 if commands are allowed
2456 */
2457
2458static int ata_scsi_dev_enabled(struct ata_device *dev)
2459{
2460 if (unlikely(!ata_dev_enabled(dev)))
2461 return 0;
2462
9af5c9c9 2463 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
99ba9e09
BK		 2464 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2465 ata_dev_printk(dev, KERN_WARNING,
2466 "WARNING: ATAPI is %s, device ignored.\n",
2467 atapi_enabled ? "not supported with this driver" : "disabled");
2468 return 0;
2469 }
2470 }
2471
2472 return 1;
2473}
2474
1da177e4
LT		 2475/**
2476 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2477 * @ap: ATA port to which the device is attached
2478 * @scsidev: SCSI device from which we derive the ATA device
2479 *
2480 * Given various information provided in struct scsi_cmnd,
2481 * map that onto an ATA bus, and using that mapping
2482 * determine which ata_device is associated with the
2483 * SCSI command to be sent.
2484 *
2485 * LOCKING:
cca3974e 2486 * spin_lock_irqsave(host lock)
1da177e4
LT		 2487 *
2488 * RETURNS:
2489 * Associated ATA device, or %NULL if not found.
2490 */
1da177e4 2491static struct ata_device *
057ace5e 2492ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2493{
ab5b3a5b 2494 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2495
99ba9e09 2496 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2497 return NULL;
2498
1da177e4
LT		 2499 return dev;
2500}
2501
b095518e
JG		 2502/*
2503 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2504 * @byte1: Byte 1 from pass-thru CDB.
2505 *
2506 * RETURNS:
2507 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2508 */
2509static u8
2510ata_scsi_map_proto(u8 byte1)
2511{
2512 switch((byte1 & 0x1e) >> 1) {
2513 case 3: /* Non-data */
2514 return ATA_PROT_NODATA;
2515
2516 case 6: /* DMA */
23cb1d71
AL		 2517 case 10: /* UDMA Data-in */
2518 case 11: /* UDMA Data-Out */
b095518e
JG		 2519 return ATA_PROT_DMA;
2520
2521 case 4: /* PIO Data-in */
2522 case 5: /* PIO Data-out */
b095518e
JG		 2523 return ATA_PROT_PIO;
2524
b095518e
JG		 2525 case 0: /* Hard Reset */
2526 case 1: /* SRST */
f93f1078
AL		 2527 case 8: /* Device Diagnostic */
2528 case 9: /* Device Reset */
2529 case 7: /* DMA Queued */
f93f1078
AL		 2530 case 12: /* FPDMA */
2531 case 15: /* Return Response Info */
b095518e
JG		 2532 default: /* Reserved */
2533 break;
2534 }
2535
2536 return ATA_PROT_UNKNOWN;
2537}
2538
2539/**
2540 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2541 * @qc: command structure to be initialized
b095518e
JG		 2542 *
2543 * Handles either 12 or 16-byte versions of the CDB.
2544 *
2545 * RETURNS:
2546 * Zero on success, non-zero on failure.
2547 */
ad706991 2548static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2549{
2550 struct ata_taskfile *tf = &(qc->tf);
542b1444 2551 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2552 struct ata_device *dev = qc->dev;
ad706991 2553 const u8 *cdb = scmd->cmnd;
b095518e 2554
542b1444 2555 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2556 goto invalid_fld;
8190bdb9 2557
f79d409f
AC		 2558 /* We may not issue DMA commands if no DMA mode is set */
2559 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2560 goto invalid_fld;
b095518e
JG		 2561
2562 /*
2563 * 12 and 16 byte CDBs use different offsets to
2564 * provide the various register values.
2565 */
542b1444 2566 if (cdb[0] == ATA_16) {
b095518e
JG		 2567 /*
2568 * 16-byte CDB - may contain extended commands.
2569 *
2570 * If that is the case, copy the upper byte register values.
2571 */
542b1444
TH		 2572 if (cdb[1] & 0x01) {
2573 tf->hob_feature = cdb[3];
2574 tf->hob_nsect = cdb[5];
2575 tf->hob_lbal = cdb[7];
2576 tf->hob_lbam = cdb[9];
2577 tf->hob_lbah = cdb[11];
b095518e
JG		 2578 tf->flags |= ATA_TFLAG_LBA48;
2579 } else
2580 tf->flags &= ~ATA_TFLAG_LBA48;
2581
2582 /*
2583 * Always copy low byte, device and command registers.
2584 */
542b1444
TH		 2585 tf->feature = cdb[4];
2586 tf->nsect = cdb[6];
2587 tf->lbal = cdb[8];
2588 tf->lbam = cdb[10];
2589 tf->lbah = cdb[12];
2590 tf->device = cdb[13];
2591 tf->command = cdb[14];
b095518e
JG		 2592 } else {
2593 /*
2594 * 12-byte CDB - incapable of extended commands.
2595 */
2596 tf->flags &= ~ATA_TFLAG_LBA48;
2597
542b1444
TH		 2598 tf->feature = cdb[3];
2599 tf->nsect = cdb[4];
2600 tf->lbal = cdb[5];
2601 tf->lbam = cdb[6];
2602 tf->lbah = cdb[7];
2603 tf->device = cdb[8];
2604 tf->command = cdb[9];
b095518e 2605 }
fa4453c4
AL		 2606
2607 /* enforce correct master/slave bit */
2608 tf->device = dev->devno ?
2609 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2610
1dce589c
AL		 2611 /* sanity check for pio multi commands */
2612 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2613 goto invalid_fld;
2614
2615 if (is_multi_taskfile(tf)) {
2616 unsigned int multi_count = 1 << (cdb[1] >> 5);
2617
2618 /* compare the passed through multi_count
2619 * with the cached multi_count of libata
2620 */
2621 if (multi_count != dev->multi_count)
2622 ata_dev_printk(dev, KERN_WARNING,
2623 "invalid multi_count %u ignored\n",
2624 multi_count);
d26fc955 2625 }
1dce589c 2626
5a5dbd18
ML		 2627 /* READ/WRITE LONG use a non-standard sect_size */
2628 qc->sect_size = ATA_SECT_SIZE;
2629 switch (tf->command) {
2630 case ATA_CMD_READ_LONG:
2631 case ATA_CMD_READ_LONG_ONCE:
2632 case ATA_CMD_WRITE_LONG:
2633 case ATA_CMD_WRITE_LONG_ONCE:
2634 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2635 goto invalid_fld;
2636 qc->sect_size = scmd->request_bufflen;
2637 }
2638
b095518e
JG		 2639 /*
2640 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2641 * SET_FEATURES - XFER MODE must be preceded/succeeded
2642 * by an update to hardware-specific registers for each
2643 * controller (i.e. the reason for ->set_piomode(),
2644 * ->set_dmamode(), and ->post_set_mode() hooks).
2645 */
2646 if ((tf->command == ATA_CMD_SET_FEATURES)
2647 && (tf->feature == SETFEATURES_XFER))
9a405257 2648 goto invalid_fld;
b095518e
JG		 2649
2650 /*
2651 * Set flags so that all registers will be written,
2652 * and pass on write indication (used for PIO/DMA
2653 * setup.)
2654 */
2655 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2656
542b1444 2657 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2658 tf->flags |= ATA_TFLAG_WRITE;
2659
2660 /*
2661 * Set transfer length.
2662 *
2663 * TODO: find out if we need to do more here to
2664 * cover scatter/gather case.
2665 */
726f0785 2666 qc->nbytes = scmd->request_bufflen;
b095518e 2667
e61e0672
TH		 2668 /* request result TF */
2669 qc->flags |= ATA_QCFLAG_RESULT_TF;
2670
b095518e 2671 return 0;
9a405257
TH		 2672
2673 invalid_fld:
542b1444 2674 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2675 /* "Invalid field in cdb" */
2676 return 1;
b095518e
JG		 2677}
2678
1da177e4
LT		 2679/**
2680 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2681 * @dev: ATA device
2682 * @cmd: SCSI command opcode to consider
2683 *
2684 * Look up the SCSI command given, and determine whether the
2685 * SCSI command is to be translated or simulated.
2686 *
2687 * RETURNS:
2688 * Pointer to translation function if possible, %NULL if not.
2689 */
2690
2691static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2692{
2693 switch (cmd) {
2694 case READ_6:
2695 case READ_10:
2696 case READ_16:
2697
2698 case WRITE_6:
2699 case WRITE_10:
2700 case WRITE_16:
2701 return ata_scsi_rw_xlat;
2702
2703 case SYNCHRONIZE_CACHE:
2704 if (ata_try_flush_cache(dev))
2705 return ata_scsi_flush_xlat;
2706 break;
2707
2708 case VERIFY:
2709 case VERIFY_16:
2710 return ata_scsi_verify_xlat;
b095518e
JG		 2711
2712 case ATA_12:
2713 case ATA_16:
2714 return ata_scsi_pass_thru;
da61396d 2715
972dcafb
DG		 2716 case START_STOP:
2717 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2718 }
2719
2720 return NULL;
2721}
2722
2723/**
2724 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2725 * @ap: ATA port to which the command was being sent
2726 * @cmd: SCSI command to dump
2727 *
2728 * Prints the contents of a SCSI command via printk().
2729 */
2730
2731static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2732 struct scsi_cmnd *cmd)
2733{
2734#ifdef ATA_DEBUG
2735 struct scsi_device *scsidev = cmd->device;
2736 u8 *scsicmd = cmd->cmnd;
2737
2738 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2739 ap->print_id,
1da177e4
LT		 2740 scsidev->channel, scsidev->id, scsidev->lun,
2741 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2742 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2743 scsicmd[8]);
2744#endif
2745}
2746
542b1444 2747static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 2748 void (*done)(struct scsi_cmnd *),
2749 struct ata_device *dev)
eb3f0f9c 2750{
baf4fdfa
ML		 2751 u8 scsi_op = scmd->cmnd[0];
2752 ata_xlat_func_t xlat_func;
2115ea94
TH		 2753 int rc = 0;
2754
eb3f0f9c 2755 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 2756 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2757 goto bad_cdb_len;
eb3f0f9c 2758
baf4fdfa
ML		 2759 xlat_func = ata_get_xlat_func(dev, scsi_op);
2760 } else {
2761 if (unlikely(!scmd->cmd_len))
2762 goto bad_cdb_len;
2763
2764 xlat_func = NULL;
2765 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2766 /* relay SCSI command to ATAPI device */
2767 if (unlikely(scmd->cmd_len > dev->cdb_len))
2768 goto bad_cdb_len;
2769
2770 xlat_func = atapi_xlat;
2771 } else {
2772 /* ATA_16 passthru, treat as an ATA command */
2773 if (unlikely(scmd->cmd_len > 16))
2774 goto bad_cdb_len;
2775
2776 xlat_func = ata_get_xlat_func(dev, scsi_op);
2777 }
2778 }
2779
2780 if (xlat_func)
2781 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2782 else
2783 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 2784
2785 return rc;
baf4fdfa
ML		 2786
2787 bad_cdb_len:
2788 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2789 scmd->cmd_len, scsi_op, dev->cdb_len);
2790 scmd->result = DID_ERROR << 16;
2791 done(scmd);
2792 return 0;
eb3f0f9c
BK		 2793}
2794
1da177e4
LT		 2795/**
2796 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2797 * @cmd: SCSI command to be sent
2798 * @done: Completion function, called when command is complete
2799 *
2800 * In some cases, this function translates SCSI commands into
2801 * ATA taskfiles, and queues the taskfiles to be sent to
2802 * hardware. In other cases, this function simulates a
2803 * SCSI device by evaluating and responding to certain
2804 * SCSI commands. This creates the overall effect of
2805 * ATA and ATAPI devices appearing as SCSI devices.
2806 *
2807 * LOCKING:
cca3974e 2808 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2809 *
2810 * RETURNS:
2115ea94
TH		 2811 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2812 * 0 otherwise.
1da177e4 2813 */
1da177e4
LT		 2814int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2815{
2816 struct ata_port *ap;
2817 struct ata_device *dev;
2818 struct scsi_device *scsidev = cmd->device;
005a5a06 2819 struct Scsi_Host *shost = scsidev->host;
2115ea94 2820 int rc = 0;
1da177e4 2821
35bb94b1 2822 ap = ata_shost_to_port(shost);
005a5a06
JG		 2823
2824 spin_unlock(shost->host_lock);
ba6a1308 2825 spin_lock(ap->lock);
1da177e4
LT		 2826
2827 ata_scsi_dump_cdb(ap, cmd);
2828
2829 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2830 if (likely(dev))
2115ea94 2831 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2832 else {
1da177e4
LT		 2833 cmd->result = (DID_BAD_TARGET << 16);
2834 done(cmd);
1da177e4
LT		 2835 }
2836
ba6a1308 2837 spin_unlock(ap->lock);
005a5a06 2838 spin_lock(shost->host_lock);
2115ea94 2839 return rc;
1da177e4
LT		 2840}
2841
2842/**
2843 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2844 * @dev: the target device
1da177e4
LT		 2845 * @cmd: SCSI command being sent to device.
2846 * @done: SCSI command completion function.
2847 *
2848 * Interprets and directly executes a select list of SCSI commands
2849 * that can be handled internally.
2850 *
2851 * LOCKING:
cca3974e 2852 * spin_lock_irqsave(host lock)
1da177e4
LT		 2853 */
2854
3373efd8 2855void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2856 void (*done)(struct scsi_cmnd *))
2857{
2858 struct ata_scsi_args args;
057ace5e 2859 const u8 *scsicmd = cmd->cmnd;
1da177e4 2860
9a3dccc4
TH		 2861 args.dev = dev;
2862 args.id = dev->id;
1da177e4
LT		 2863 args.cmd = cmd;
2864 args.done = done;
2865
2866 switch(scsicmd[0]) {
2867 /* no-op's, complete with success */
2868 case SYNCHRONIZE_CACHE:
2869 case REZERO_UNIT:
2870 case SEEK_6:
2871 case SEEK_10:
2872 case TEST_UNIT_READY:
2873 case FORMAT_UNIT: /* FIXME: correct? */
2874 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2875 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2876 break;
2877
2878 case INQUIRY:
2879 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2880 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2881 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2882 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2883 else if (scsicmd[2] == 0x00)
2884 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2885 else if (scsicmd[2] == 0x80)
2886 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2887 else if (scsicmd[2] == 0x83)
2888 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2889 else
ae006510 2890 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2891 break;
2892
2893 case MODE_SENSE:
2894 case MODE_SENSE_10:
2895 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2896 break;
2897
2898 case MODE_SELECT: /* unconditionally return */
2899 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2900 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2901 break;
2902
2903 case READ_CAPACITY:
2904 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2905 break;
2906
2907 case SERVICE_ACTION_IN:
2908 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2909 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2910 else
ae006510 2911 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2912 break;
2913
2914 case REPORT_LUNS:
2915 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2916 break;
2917
b095518e 2918 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2919 case REQUEST_SENSE:
2920
2921 /* all other commands */
2922 default:
ae006510
DG		 2923 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2924 /* "Invalid command operation code" */
2925 done(cmd);
1da177e4
LT		 2926 break;
2927 }
2928}
2929
f3187195
TH		 2930int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
2931{
2932 int i, rc;
2933
2934 for (i = 0; i < host->n_ports; i++) {
2935 struct ata_port *ap = host->ports[i];
2936 struct Scsi_Host *shost;
2937
2938 rc = -ENOMEM;
2939 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
2940 if (!shost)
2941 goto err_alloc;
2942
2943 *(struct ata_port **)&shost->hostdata[0] = ap;
2944 ap->scsi_host = shost;
2945
2946 shost->transportt = &ata_scsi_transport_template;
2947 shost->unique_id = ap->print_id;
2948 shost->max_id = 16;
2949 shost->max_lun = 1;
2950 shost->max_channel = 1;
2951 shost->max_cmd_len = 16;
2952
2953 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
2954 if (rc)
2955 goto err_add;
2956 }
2957
2958 return 0;
2959
2960 err_add:
2961 scsi_host_put(host->ports[i]->scsi_host);
2962 err_alloc:
2963 while (--i >= 0) {
2964 struct Scsi_Host *shost = host->ports[i]->scsi_host;
2965
2966 scsi_remove_host(shost);
2967 scsi_host_put(shost);
2968 }
2969 return rc;
2970}
2971
1ae46317 2972void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 2973{
1ae46317
TH		 2974 int tries = 5;
2975 struct ata_device *last_failed_dev = NULL;
41bda9c9 2976 struct ata_link *link;
1ae46317 2977 struct ata_device *dev;
644dd0cc 2978
198e0fed 2979 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2980 return;
2981
1ae46317 2982 repeat:
41bda9c9
TH		 2983 ata_port_for_each_link(link, ap) {
2984 ata_link_for_each_dev(dev, link) {
2985 struct scsi_device *sdev;
2986 int channel = 0, id = 0;
3edebac4 2987
41bda9c9
TH		 2988 if (!ata_dev_enabled(dev) || dev->sdev)
2989 continue;
3f19ee8c 2990
41bda9c9
TH		 2991 if (ata_is_host_link(link))
2992 id = dev->devno;
2993 else
2994 channel = link->pmp;
2995
2996 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
2997 NULL);
2998 if (!IS_ERR(sdev)) {
2999 dev->sdev = sdev;
3000 scsi_device_put(sdev);
3001 }
3edebac4 3002 }
3f19ee8c 3003 }
1ae46317
TH		 3004
3005 /* If we scanned while EH was in progress or allocation
3006 * failure occurred, scan would have failed silently. Check
3007 * whether all devices are attached.
3008 */
41bda9c9
TH		 3009 ata_port_for_each_link(link, ap) {
3010 ata_link_for_each_dev(dev, link) {
3011 if (ata_dev_enabled(dev) && !dev->sdev)
3012 goto exit_loop;
3013 }
1ae46317 3014 }
41bda9c9
TH		 3015 exit_loop:
3016 if (!link)
1ae46317
TH		 3017 return;
3018
3019 /* we're missing some SCSI devices */
3020 if (sync) {
3021 /* If caller requested synchrnous scan && we've made
3022 * any progress, sleep briefly and repeat.
3023 */
3024 if (dev != last_failed_dev) {
3025 msleep(100);
3026 last_failed_dev = dev;
3027 goto repeat;
3028 }
3029
3030 /* We might be failing to detect boot device, give it
3031 * a few more chances.
3032 */
3033 if (--tries) {
3034 msleep(100);
3035 goto repeat;
3036 }
3037
3038 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3039 "failed without making any progress,\n"
3040 " switching to async\n");
3041 }
3042
3043 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3044 round_jiffies_relative(HZ));
644dd0cc 3045}
0ea035a3
TH		 3046
3047/**
3048 * ata_scsi_offline_dev - offline attached SCSI device
3049 * @dev: ATA device to offline attached SCSI device for
3050 *
3051 * This function is called from ata_eh_hotplug() and responsible
3052 * for taking the SCSI device attached to @dev offline. This
cca3974e 3053 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3054 * against clearing.
3055 *
3056 * LOCKING:
cca3974e 3057 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3058 *
3059 * RETURNS:
3060 * 1 if attached SCSI device exists, 0 otherwise.
3061 */
3062int ata_scsi_offline_dev(struct ata_device *dev)
3063{
3064 if (dev->sdev) {
3065 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3066 return 1;
3067 }
3068 return 0;
3069}
580b2102
TH		 3070
3071/**
3072 * ata_scsi_remove_dev - remove attached SCSI device
3073 * @dev: ATA device to remove attached SCSI device for
3074 *
3075 * This function is called from ata_eh_scsi_hotplug() and
3076 * responsible for removing the SCSI device attached to @dev.
3077 *
3078 * LOCKING:
3079 * Kernel thread context (may sleep).
3080 */
3081static void ata_scsi_remove_dev(struct ata_device *dev)
3082{
9af5c9c9 3083 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3084 struct scsi_device *sdev;
3085 unsigned long flags;
3086
3087 /* Alas, we need to grab scan_mutex to ensure SCSI device
3088 * state doesn't change underneath us and thus
3089 * scsi_device_get() always succeeds. The mutex locking can
3090 * be removed if there is __scsi_device_get() interface which
3091 * increments reference counts regardless of device state.
3092 */
cca3974e 3093 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3094 spin_lock_irqsave(ap->lock, flags);
580b2102 3095
cca3974e 3096 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3097 sdev = dev->sdev;
3098 dev->sdev = NULL;
3099
3100 if (sdev) {
3101 /* If user initiated unplug races with us, sdev can go
cca3974e 3102 * away underneath us after the host lock and
580b2102
TH		 3103 * scan_mutex are released. Hold onto it.
3104 */
3105 if (scsi_device_get(sdev) == 0) {
3106 /* The following ensures the attached sdev is
3107 * offline on return from ata_scsi_offline_dev()
3108 * regardless it wins or loses the race
3109 * against this function.
3110 */
3111 scsi_device_set_state(sdev, SDEV_OFFLINE);
3112 } else {
3113 WARN_ON(1);
3114 sdev = NULL;
3115 }
3116 }
3117
ba6a1308 3118 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3119 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3120
3121 if (sdev) {
3122 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3123 sdev->sdev_gendev.bus_id);
3124
3125 scsi_remove_device(sdev);
3126 scsi_device_put(sdev);
3127 }
3128}
3129
41bda9c9
TH		 3130static void ata_scsi_handle_link_detach(struct ata_link *link)
3131{
3132 struct ata_port *ap = link->ap;
3133 struct ata_device *dev;
3134
3135 ata_link_for_each_dev(dev, link) {
3136 unsigned long flags;
3137
3138 if (!(dev->flags & ATA_DFLAG_DETACHED))
3139 continue;
3140
3141 spin_lock_irqsave(ap->lock, flags);
3142 dev->flags &= ~ATA_DFLAG_DETACHED;
3143 spin_unlock_irqrestore(ap->lock, flags);
3144
3145 ata_scsi_remove_dev(dev);
3146 }
3147}
3148
2f294968
KCA		 3149/**
3150 * ata_scsi_media_change_notify - send media change event
3151 * @atadev: Pointer to the disk device with media change event
3152 *
3153 * Tell the block layer to send a media change notification
3154 * event.
3155 *
3156 * LOCKING:
3157 * interrupt context, may not sleep.
3158 */
3159void ata_scsi_media_change_notify(struct ata_device *atadev)
3160{
3161#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3162 scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
3163#endif
3164}
3165EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
3166
580b2102
TH		 3167/**
3168 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3169 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3170 *
3171 * Perform SCSI part of hotplug. It's executed from a separate
3172 * workqueue after EH completes. This is necessary because SCSI
3173 * hot plugging requires working EH and hot unplugging is
3174 * synchronized with hot plugging with a mutex.
3175 *
3176 * LOCKING:
3177 * Kernel thread context (may sleep).
3178 */
65f27f38 3179void ata_scsi_hotplug(struct work_struct *work)
580b2102 3180{
65f27f38
DH		 3181 struct ata_port *ap =
3182 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3183 int i;
580b2102 3184
b51e9e5d 3185 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3186 DPRINTK("ENTER/EXIT - unloading\n");
3187 return;
3188 }
3189
3190 DPRINTK("ENTER\n");
3191
41bda9c9
TH		 3192 /* Unplug detached devices. We cannot use link iterator here
3193 * because PMP links have to be scanned even if PMP is
3194 * currently not attached. Iterate manually.
3195 */
3196 ata_scsi_handle_link_detach(&ap->link);
3197 if (ap->pmp_link)
3198 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3199 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3200
3201 /* scan for new ones */
1ae46317 3202 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3203
3204 DPRINTK("EXIT\n");
3205}
83c47bcb
TH		 3206
3207/**
3208 * ata_scsi_user_scan - indication for user-initiated bus scan
3209 * @shost: SCSI host to scan
3210 * @channel: Channel to scan
3211 * @id: ID to scan
3212 * @lun: LUN to scan
3213 *
3214 * This function is called when user explicitly requests bus
3215 * scan. Set probe pending flag and invoke EH.
3216 *
3217 * LOCKING:
3218 * SCSI layer (we don't care)
3219 *
3220 * RETURNS:
3221 * Zero.
3222 */
3223static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3224 unsigned int id, unsigned int lun)
3225{
3226 struct ata_port *ap = ata_shost_to_port(shost);
3227 unsigned long flags;
41bda9c9 3228 int devno, rc = 0;
83c47bcb
TH		 3229
3230 if (!ap->ops->error_handler)
3231 return -EOPNOTSUPP;
3232
41bda9c9 3233 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3234 return -EINVAL;
3235
41bda9c9
TH		 3236 if (ap->nr_pmp_links == 0) {
3237 if (channel != SCAN_WILD_CARD && channel)
3238 return -EINVAL;
3239 devno = id;
3240 } else {
3241 if (id != SCAN_WILD_CARD && id)
3242 return -EINVAL;
3243 devno = channel;
3244 }
3245
ba6a1308 3246 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3247
41bda9c9
TH		 3248 if (devno == SCAN_WILD_CARD) {
3249 struct ata_link *link;
3250
3251 ata_port_for_each_link(link, ap) {
3252 struct ata_eh_info *ehi = &link->eh_info;
3253 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3254 ehi->action |= ATA_EH_SOFTRESET;
3255 }
83c47bcb 3256 } else {
41bda9c9 3257 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3258
3259 if (dev) {
41bda9c9 3260 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9
TH		 3261 ehi->probe_mask |= 1 << dev->devno;
3262 ehi->action |= ATA_EH_SOFTRESET;
3263 ehi->flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3264 } else
3265 rc = -EINVAL;
3266 }
3267
309afcb5 3268 if (rc == 0) {
83c47bcb 3269 ata_port_schedule_eh(ap);
309afcb5
TH		 3270 spin_unlock_irqrestore(ap->lock, flags);
3271 ata_port_wait_eh(ap);
3272 } else
3273 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3274
3275 return rc;
3276}
3057ac3c 3277
3278/**
d0171269 3279 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3280 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3281 *
d0171269
TH		 3282 * After ATA pass thru (SAT) commands are executed successfully,
3283 * libata need to propagate the changes to SCSI layer. This
3284 * function must be executed from ata_aux_wq such that sdev
3285 * attach/detach don't race with rescan.
3057ac3c 3286 *
d0171269
TH		 3287 * LOCKING:
3288 * Kernel thread context (may sleep).
3057ac3c 3289 */
65f27f38 3290void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3291{
65f27f38
DH		 3292 struct ata_port *ap =
3293 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3294 struct ata_link *link;
f58229f8 3295 struct ata_device *dev;
f84e7e41 3296 unsigned long flags;
3057ac3c 3297
f84e7e41
TH		 3298 spin_lock_irqsave(ap->lock, flags);
3299
41bda9c9
TH		 3300 ata_port_for_each_link(link, ap) {
3301 ata_link_for_each_dev(dev, link) {
3302 struct scsi_device *sdev = dev->sdev;
3057ac3c 3303
41bda9c9
TH		 3304 if (!ata_dev_enabled(dev) || !sdev)
3305 continue;
3306 if (scsi_device_get(sdev))
3307 continue;
f84e7e41 3308
41bda9c9
TH		 3309 spin_unlock_irqrestore(ap->lock, flags);
3310 scsi_rescan_device(&(sdev->sdev_gendev));
3311 scsi_device_put(sdev);
3312 spin_lock_irqsave(ap->lock, flags);
3313 }
3057ac3c 3314 }
f84e7e41
TH		 3315
3316 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3317}
80289167
BK		 3318
3319/**
3320 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3321 * @host: ATA host container for all SAS ports
80289167 3322 * @port_info: Information from low-level host driver
cca3974e 3323 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3324 *
3325 * LOCKING:
3326 * PCI/etc. bus probe sem.
3327 *
3328 * RETURNS:
3329 * ata_port pointer on success / NULL on failure.
3330 */
3331
cca3974e 3332struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3333 struct ata_port_info *port_info,
cca3974e 3334 struct Scsi_Host *shost)
80289167 3335{
f3187195 3336 struct ata_port *ap;
80289167 3337
f3187195 3338 ap = ata_port_alloc(host);
80289167
BK		 3339 if (!ap)
3340 return NULL;
3341
f3187195 3342 ap->port_no = 0;
cca3974e 3343 ap->lock = shost->host_lock;
f3187195
TH		 3344 ap->pio_mask = port_info->pio_mask;
3345 ap->mwdma_mask = port_info->mwdma_mask;
3346 ap->udma_mask = port_info->udma_mask;
3347 ap->flags |= port_info->flags;
3348 ap->ops = port_info->port_ops;
3349 ap->cbl = ATA_CBL_SATA;
3350
80289167
BK		 3351 return ap;
3352}
3353EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3354
3355/**
3356 * ata_sas_port_start - Set port up for dma.
3357 * @ap: Port to initialize
3358 *
3359 * Called just after data structures for each port are
3360 * initialized. Allocates DMA pad.
3361 *
3362 * May be used as the port_start() entry in ata_port_operations.
3363 *
3364 * LOCKING:
3365 * Inherited from caller.
3366 */
3367int ata_sas_port_start(struct ata_port *ap)
3368{
3369 return ata_pad_alloc(ap, ap->dev);
3370}
3371EXPORT_SYMBOL_GPL(ata_sas_port_start);
3372
3373/**
3374 * ata_port_stop - Undo ata_sas_port_start()
3375 * @ap: Port to shut down
3376 *
3377 * Frees the DMA pad.
3378 *
3379 * May be used as the port_stop() entry in ata_port_operations.
3380 *
3381 * LOCKING:
3382 * Inherited from caller.
3383 */
3384
3385void ata_sas_port_stop(struct ata_port *ap)
3386{
3387 ata_pad_free(ap, ap->dev);
3388}
3389EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3390
3391/**
3392 * ata_sas_port_init - Initialize a SATA device
3393 * @ap: SATA port to initialize
3394 *
3395 * LOCKING:
3396 * PCI/etc. bus probe sem.
3397 *
3398 * RETURNS:
3399 * Zero on success, non-zero on error.
3400 */
3401
3402int ata_sas_port_init(struct ata_port *ap)
3403{
3404 int rc = ap->ops->port_start(ap);
3405
f3187195
TH		 3406 if (!rc) {
3407 ap->print_id = ata_print_id++;
80289167 3408 rc = ata_bus_probe(ap);
f3187195 3409 }
80289167
BK		 3410
3411 return rc;
3412}
3413EXPORT_SYMBOL_GPL(ata_sas_port_init);
3414
3415/**
3416 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3417 * @ap: SATA port to destroy
3418 *
3419 */
3420
3421void ata_sas_port_destroy(struct ata_port *ap)
3422{
f0d36efd
TH		 3423 if (ap->ops->port_stop)
3424 ap->ops->port_stop(ap);
80289167
BK		 3425 kfree(ap);
3426}
3427EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3428
3429/**
3430 * ata_sas_slave_configure - Default slave_config routine for libata devices
3431 * @sdev: SCSI device to configure
3432 * @ap: ATA port to which SCSI device is attached
3433 *
3434 * RETURNS:
3435 * Zero.
3436 */
3437
3438int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3439{
3440 ata_scsi_sdev_config(sdev);
9af5c9c9 3441 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3442 return 0;
3443}
3444EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3445
3446/**
3447 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3448 * @cmd: SCSI command to be sent
3449 * @done: Completion function, called when command is complete
3450 * @ap: ATA port to which the command is being sent
3451 *
3452 * RETURNS:
08475a19
BK		 3453 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3454 * 0 otherwise.
80289167
BK		 3455 */
3456
3457int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3458 struct ata_port *ap)
3459{
08475a19
BK		 3460 int rc = 0;
3461
80289167
BK		 3462 ata_scsi_dump_cdb(ap, cmd);
3463
9af5c9c9
TH		 3464 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3465 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3466 else {
3467 cmd->result = (DID_BAD_TARGET << 16);
3468 done(cmd);
3469 }
08475a19 3470 return rc;
80289167
BK		 3471}
3472EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
kernel source for telekom puls (alcatel/mediatek)