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[libata] SCSI: improve FORMAT UNIT; minor code cleanups
[deliverable/linux.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
7120165c
BH		 453 qc->__sg = scsi_sglist(cmd);
454 qc->n_elem = scsi_sg_count(cmd);
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 1494 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1495 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1496 if (unlikely(scsi_bufflen(cmd) < 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
7120165c 1502 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
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
7120165c 1556 struct scatterlist *sg = scsi_sglist(cmd);
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{
7120165c 1583 struct scatterlist *sg = scsi_sglist(cmd);
e10b8c3f 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
ad355b46
JG		 1806/**
1807 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
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 * Yields SAT-specified ATA VPD page.
1813 *
1814 * LOCKING:
1815 * spin_lock_irqsave(host lock)
1816 */
1817
1818unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1819 unsigned int buflen)
1820{
1821 u8 pbuf[60];
1822 struct ata_taskfile tf;
1823 unsigned int i;
1824
1825 if (!buflen)
1826 return 0;
1827
1828 memset(&pbuf, 0, sizeof(pbuf));
1829 memset(&tf, 0, sizeof(tf));
1830
1831 pbuf[1] = 0x89; /* our page code */
1832 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1833 pbuf[3] = (0x238 & 0xff);
1834
1835 memcpy(&pbuf[8], "ATA ", 8);
1836 ata_id_string(args->id, &pbuf[16], ATA_ID_PROD, 16);
1837 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1838
1839 /* we don't store the ATA device signature, so we fake it */
1840
1841 tf.command = ATA_DRDY; /* really, this is Status reg */
1842 tf.lbal = 0x1;
1843 tf.nsect = 0x1;
1844
1845 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1846 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1847
1848 pbuf[56] = ATA_CMD_ID_ATA;
1849
1850 i = min(buflen, 60U);
1851 memcpy(rbuf, &pbuf[0], i);
1852 buflen -= i;
1853
1854 if (!buflen)
1855 return 0;
1856
1857 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1858 return 0;
1859}
1860
1da177e4 1861/**
0cba632b 1862 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1863 * @args: device IDENTIFY data / SCSI command of interest.
1864 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1865 * @buflen: Response buffer length.
1866 *
1867 * No operation. Simply returns success to caller, to indicate
1868 * that the caller should successfully complete this SCSI command.
1869 *
1870 * LOCKING:
cca3974e 1871 * spin_lock_irqsave(host lock)
1da177e4
LT		 1872 */
1873
1874unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1875 unsigned int buflen)
1876{
1877 VPRINTK("ENTER\n");
1878 return 0;
1879}
1880
1881/**
1882 * ata_msense_push - Push data onto MODE SENSE data output buffer
1883 * @ptr_io: (input/output) Location to store more output data
1884 * @last: End of output data buffer
1885 * @buf: Pointer to BLOB being added to output buffer
1886 * @buflen: Length of BLOB
1887 *
1888 * Store MODE SENSE data on an output buffer.
1889 *
1890 * LOCKING:
1891 * None.
1892 */
1893
1894static void ata_msense_push(u8 **ptr_io, const u8 *last,
1895 const u8 *buf, unsigned int buflen)
1896{
1897 u8 *ptr = *ptr_io;
1898
1899 if ((ptr + buflen - 1) > last)
1900 return;
1901
1902 memcpy(ptr, buf, buflen);
1903
1904 ptr += buflen;
1905
1906 *ptr_io = ptr;
1907}
1908
1909/**
1910 * ata_msense_caching - Simulate MODE SENSE caching info page
1911 * @id: device IDENTIFY data
1912 * @ptr_io: (input/output) Location to store more output data
1913 * @last: End of output data buffer
1914 *
1915 * Generate a caching info page, which conditionally indicates
1916 * write caching to the SCSI layer, depending on device
1917 * capabilities.
1918 *
1919 * LOCKING:
1920 * None.
1921 */
1922
1923static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1924 const u8 *last)
1925{
00ac37f5 1926 u8 page[CACHE_MPAGE_LEN];
1da177e4 1927
00ac37f5 1928 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1929 if (ata_id_wcache_enabled(id))
1930 page[2] |= (1 << 2); /* write cache enable */
1931 if (!ata_id_rahead_enabled(id))
1932 page[12] |= (1 << 5); /* disable read ahead */
1933
1934 ata_msense_push(ptr_io, last, page, sizeof(page));
1935 return sizeof(page);
1936}
1937
1938/**
1939 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1940 * @dev: Device associated with this MODE SENSE command
1941 * @ptr_io: (input/output) Location to store more output data
1942 * @last: End of output data buffer
1943 *
1944 * Generate a generic MODE SENSE control mode page.
1945 *
1946 * LOCKING:
1947 * None.
1948 */
1949
1950static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1951{
00ac37f5
DG		 1952 ata_msense_push(ptr_io, last, def_control_mpage,
1953 sizeof(def_control_mpage));
1954 return sizeof(def_control_mpage);
1da177e4
LT		 1955}
1956
1957/**
1958 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1959 * @dev: Device associated with this MODE SENSE command
1960 * @ptr_io: (input/output) Location to store more output data
1961 * @last: End of output data buffer
1962 *
1963 * Generate a generic MODE SENSE r/w error recovery page.
1964 *
1965 * LOCKING:
1966 * None.
1967 */
1968
1969static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1970{
1da177e4 1971
00ac37f5
DG		 1972 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1973 sizeof(def_rw_recovery_mpage));
1974 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1975}
1976
48bdc8ec
JA		 1977/*
1978 * We can turn this into a real blacklist if it's needed, for now just
1979 * blacklist any Maxtor BANC1G10 revision firmware
1980 */
1981static int ata_dev_supports_fua(u16 *id)
1982{
a0cf733b 1983 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 1984
c3c013a2
JG		 1985 if (!libata_fua)
1986 return 0;
48bdc8ec
JA		 1987 if (!ata_id_has_fua(id))
1988 return 0;
1989
a0cf733b
TH		 1990 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1991 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 1992
2e02671d 1993 if (strcmp(model, "Maxtor"))
48bdc8ec 1994 return 1;
2e02671d 1995 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 1996 return 1;
1997
1998 return 0; /* blacklisted */
1999}
2000
1da177e4
LT		 2001/**
2002 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2003 * @args: device IDENTIFY data / SCSI command of interest.
2004 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2005 * @buflen: Response buffer length.
2006 *
00ac37f5
DG		 2007 * Simulate MODE SENSE commands. Assume this is invoked for direct
2008 * access devices (e.g. disks) only. There should be no block
2009 * descriptor for other device types.
1da177e4
LT		 2010 *
2011 * LOCKING:
cca3974e 2012 * spin_lock_irqsave(host lock)
1da177e4
LT		 2013 */
2014
2015unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2016 unsigned int buflen)
2017{
9a3dccc4 2018 struct ata_device *dev = args->dev;
1da177e4 2019 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2020 const u8 sat_blk_desc[] = {
2021 0, 0, 0, 0, /* number of blocks: sat unspecified */
2022 0,
2023 0, 0x2, 0x0 /* block length: 512 bytes */
2024 };
2025 u8 pg, spg;
2026 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2027 u8 dpofua;
1da177e4
LT		 2028
2029 VPRINTK("ENTER\n");
2030
2031 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2032 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2033 /*
2034 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2035 */
00ac37f5 2036
1da177e4 2037 page_control = scsicmd[2] >> 6;
ae006510
DG		 2038 switch (page_control) {
2039 case 0: /* current */
2040 break; /* supported */
2041 case 3: /* saved */
2042 goto saving_not_supp;
2043 case 1: /* changeable */
2044 case 2: /* defaults */
2045 default:
2046 goto invalid_fld;
2047 }
1da177e4 2048
00ac37f5
DG		 2049 if (six_byte) {
2050 output_len = 4 + (ebd ? 8 : 0);
2051 alloc_len = scsicmd[4];
2052 } else {
2053 output_len = 8 + (ebd ? 8 : 0);
2054 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2055 }
2056 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2057
2058 p = rbuf + output_len;
00ac37f5 2059 last = rbuf + minlen - 1;
1da177e4 2060
00ac37f5
DG		 2061 pg = scsicmd[2] & 0x3f;
2062 spg = scsicmd[3];
2063 /*
2064 * No mode subpages supported (yet) but asking for _all_
2065 * subpages may be valid
2066 */
2067 if (spg && (spg != ALL_SUB_MPAGES))
2068 goto invalid_fld;
2069
2070 switch(pg) {
2071 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2072 output_len += ata_msense_rw_recovery(&p, last);
2073 break;
2074
00ac37f5 2075 case CACHE_MPAGE:
1da177e4
LT		 2076 output_len += ata_msense_caching(args->id, &p, last);
2077 break;
2078
00ac37f5 2079 case CONTROL_MPAGE: {
1da177e4
LT		 2080 output_len += ata_msense_ctl_mode(&p, last);
2081 break;
2082 }
2083
00ac37f5 2084 case ALL_MPAGES:
1da177e4
LT		 2085 output_len += ata_msense_rw_recovery(&p, last);
2086 output_len += ata_msense_caching(args->id, &p, last);
2087 output_len += ata_msense_ctl_mode(&p, last);
2088 break;
2089
2090 default: /* invalid page code */
ae006510 2091 goto invalid_fld;
1da177e4
LT		 2092 }
2093
00ac37f5
DG		 2094 if (minlen < 1)
2095 return 0;
9a3dccc4
TH		 2096
2097 dpofua = 0;
f79d409f 2098 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2099 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2100 dpofua = 1 << 4;
2101
1da177e4
LT		 2102 if (six_byte) {
2103 output_len--;
2104 rbuf[0] = output_len;
9a3dccc4
TH		 2105 if (minlen > 2)
2106 rbuf[2] |= dpofua;
00ac37f5
DG		 2107 if (ebd) {
2108 if (minlen > 3)
2109 rbuf[3] = sizeof(sat_blk_desc);
2110 if (minlen > 11)
2111 memcpy(rbuf + 4, sat_blk_desc,
2112 sizeof(sat_blk_desc));
2113 }
1da177e4
LT		 2114 } else {
2115 output_len -= 2;
2116 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2117 if (minlen > 1)
2118 rbuf[1] = output_len;
9a3dccc4
TH		 2119 if (minlen > 3)
2120 rbuf[3] |= dpofua;
00ac37f5
DG		 2121 if (ebd) {
2122 if (minlen > 7)
2123 rbuf[7] = sizeof(sat_blk_desc);
2124 if (minlen > 15)
2125 memcpy(rbuf + 8, sat_blk_desc,
2126 sizeof(sat_blk_desc));
2127 }
1da177e4 2128 }
1da177e4 2129 return 0;
ae006510
DG		 2130
2131invalid_fld:
2132 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2133 /* "Invalid field in cbd" */
2134 return 1;
2135
2136saving_not_supp:
2137 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2138 /* "Saving parameters not supported" */
2139 return 1;
1da177e4
LT		 2140}
2141
2142/**
2143 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2144 * @args: device IDENTIFY data / SCSI command of interest.
2145 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2146 * @buflen: Response buffer length.
2147 *
2148 * Simulate READ CAPACITY commands.
2149 *
2150 * LOCKING:
6a36261e 2151 * None.
1da177e4 2152 */
1da177e4
LT		 2153unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2154 unsigned int buflen)
2155{
6a36261e 2156 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2157
2158 VPRINTK("ENTER\n");
2159
1da177e4 2160 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2161 if (last_lba >= 0xffffffffULL)
2162 last_lba = 0xffffffff;
0c144d0d 2163
1da177e4 2164 /* sector count, 32-bit */
6a36261e
TH		 2165 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2166 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2167 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2168 ATA_SCSI_RBUF_SET(3, last_lba);
1da177e4
LT		 2169
2170 /* sector size */
6a36261e
TH		 2171 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2172 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
1da177e4
LT		 2173 } else {
2174 /* sector count, 64-bit */
6a36261e
TH		 2175 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2176 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2177 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2178 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2179 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2180 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2181 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2182 ATA_SCSI_RBUF_SET(7, last_lba);
1da177e4
LT		 2183
2184 /* sector size */
6a36261e
TH		 2185 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2186 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
1da177e4
LT		 2187 }
2188
2189 return 0;
2190}
2191
2192/**
2193 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2194 * @args: device IDENTIFY data / SCSI command of interest.
2195 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2196 * @buflen: Response buffer length.
2197 *
2198 * Simulate REPORT LUNS command.
2199 *
2200 * LOCKING:
cca3974e 2201 * spin_lock_irqsave(host lock)
1da177e4
LT		 2202 */
2203
2204unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2205 unsigned int buflen)
2206{
2207 VPRINTK("ENTER\n");
2208 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2209
2210 return 0;
2211}
2212
845c5834
DG		 2213/**
2214 * ata_scsi_set_sense - Set SCSI sense data and status
2215 * @cmd: SCSI request to be handled
2216 * @sk: SCSI-defined sense key
2217 * @asc: SCSI-defined additional sense code
2218 * @ascq: SCSI-defined additional sense code qualifier
2219 *
2220 * Helper function that builds a valid fixed format, current
2221 * response code and the given sense key (sk), additional sense
2222 * code (asc) and additional sense code qualifier (ascq) with
2223 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2224 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2225 *
2226 * LOCKING:
2227 * Not required
2228 */
2229
2230void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2231{
2232 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2233
2234 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2235 cmd->sense_buffer[2] = sk;
2236 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2237 cmd->sense_buffer[12] = asc;
2238 cmd->sense_buffer[13] = ascq;
2239}
2240
1da177e4
LT		 2241/**
2242 * ata_scsi_badcmd - End a SCSI request with an error
2243 * @cmd: SCSI request to be handled
2244 * @done: SCSI command completion function
2245 * @asc: SCSI-defined additional sense code
2246 * @ascq: SCSI-defined additional sense code qualifier
2247 *
2248 * Helper function that completes a SCSI command with
2249 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2250 * and the specified additional sense codes.
2251 *
2252 * LOCKING:
cca3974e 2253 * spin_lock_irqsave(host lock)
1da177e4
LT		 2254 */
2255
2256void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2257{
2258 DPRINTK("ENTER\n");
ae006510 2259 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2260
2261 done(cmd);
2262}
2263
77853bf2 2264static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2265{
74e6c8c3 2266 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2267 /* FIXME: not quite right; we don't want the
2268 * translation of taskfile registers into
2269 * a sense descriptors, since that's only
2270 * correct for ATA, not ATAPI
2271 */
750426aa 2272 ata_gen_passthru_sense(qc);
74e6c8c3 2273 }
a939c963 2274
c6e6e666 2275 qc->scsidone(qc->scsicmd);
77853bf2 2276 ata_qc_free(qc);
c6e6e666 2277}
a939c963 2278
c6e6e666
JG		 2279/* is it pointless to prefer PIO for "safety reasons"? */
2280static inline int ata_pio_use_silly(struct ata_port *ap)
2281{
2282 return (ap->flags & ATA_FLAG_PIO_DMA);
2283}
2284
2285static void atapi_request_sense(struct ata_queued_cmd *qc)
2286{
2287 struct ata_port *ap = qc->ap;
2288 struct scsi_cmnd *cmd = qc->scsicmd;
2289
2290 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2291
2292 /* FIXME: is this needed? */
2293 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2294
c6e6e666
JG		 2295 ap->ops->tf_read(ap, &qc->tf);
2296
2297 /* fill these in, for the case where they are -not- overwritten */
2298 cmd->sense_buffer[0] = 0x70;
2299 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2300
2301 ata_qc_reinit(qc);
2302
a939c963
JG		 2303 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2304 qc->dma_dir = DMA_FROM_DEVICE;
2305
6e7846e9 2306 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2307 qc->cdb[0] = REQUEST_SENSE;
2308 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2309
2310 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2311 qc->tf.command = ATA_CMD_PACKET;
2312
c6e6e666
JG		 2313 if (ata_pio_use_silly(ap)) {
2314 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2315 qc->tf.feature |= ATAPI_PKT_DMA;
2316 } else {
2317 qc->tf.protocol = ATA_PROT_ATAPI;
2318 qc->tf.lbam = (8 * 1024) & 0xff;
2319 qc->tf.lbah = (8 * 1024) >> 8;
2320 }
a939c963
JG		 2321 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2322
c6e6e666 2323 qc->complete_fn = atapi_sense_complete;
a939c963 2324
8e0e694a 2325 ata_qc_issue(qc);
a939c963
JG		 2326
2327 DPRINTK("EXIT\n");
2328}
2329
77853bf2 2330static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2331{
2332 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2333 unsigned int err_mask = qc->err_mask;
1da177e4 2334
a7dac447 2335 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2336
246619da
TH		 2337 /* handle completion from new EH */
2338 if (unlikely(qc->ap->ops->error_handler &&
2339 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2340
2341 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2342 /* FIXME: not quite right; we don't want the
2343 * translation of taskfile registers into a
2344 * sense descriptors, since that's only
2345 * correct for ATA, not ATAPI
2346 */
750426aa 2347 ata_gen_passthru_sense(qc);
246619da
TH		 2348 }
2349
22aac089
TH		 2350 /* SCSI EH automatically locks door if sdev->locked is
2351 * set. Sometimes door lock request continues to
2352 * fail, for example, when no media is present. This
2353 * creates a loop - SCSI EH issues door lock which
2354 * fails and gets invoked again to acquire sense data
2355 * for the failed command.
2356 *
2357 * If door lock fails, always clear sdev->locked to
2358 * avoid this infinite loop.
2359 */
2360 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2361 qc->dev->sdev->locked = 0;
2362
246619da
TH		 2363 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2364 qc->scsidone(cmd);
2365 ata_qc_free(qc);
2366 return;
2367 }
2368
2369 /* successful completion or old EH failure path */
a7dac447 2370 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2371 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2372 atapi_request_sense(qc);
77853bf2 2373 return;
74e6c8c3 2374 } else if (unlikely(err_mask)) {
a7dac447
JG		 2375 /* FIXME: not quite right; we don't want the
2376 * translation of taskfile registers into
2377 * a sense descriptors, since that's only
2378 * correct for ATA, not ATAPI
2379 */
750426aa 2380 ata_gen_passthru_sense(qc);
74e6c8c3 2381 } else {
1da177e4
LT		 2382 u8 *scsicmd = cmd->cmnd;
2383
fd71da46 2384 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2385 u8 *buf = NULL;
2386 unsigned int buflen;
2387
2388 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2389
2390 /* ATAPI devices typically report zero for their SCSI version,
2391 * and sometimes deviate from the spec WRT response data
2392 * format. If SCSI version is reported as zero like normal,
2393 * then we make the following fixups: 1) Fake MMC-5 version,
2394 * to indicate to the Linux scsi midlayer this is a modern
2395 * device. 2) Ensure response data format / ATAPI information
2396 * are always correct.
a15dbeb4
JG		 2397 */
2398 if (buf[2] == 0) {
2399 buf[2] = 0x5;
2400 buf[3] = 0x32;
2401 }
2402
1da177e4
LT		 2403 ata_scsi_rbuf_put(cmd, buf);
2404 }
a15dbeb4 2405
1da177e4
LT		 2406 cmd->result = SAM_STAT_GOOD;
2407 }
2408
2409 qc->scsidone(cmd);
77853bf2 2410 ata_qc_free(qc);
1da177e4
LT		 2411}
2412/**
2413 * atapi_xlat - Initialize PACKET taskfile
2414 * @qc: command structure to be initialized
1da177e4
LT		 2415 *
2416 * LOCKING:
cca3974e 2417 * spin_lock_irqsave(host lock)
1da177e4
LT		 2418 *
2419 * RETURNS:
2420 * Zero on success, non-zero on failure.
2421 */
ad706991 2422static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2423{
542b1444 2424 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4
LT		 2425 struct ata_device *dev = qc->dev;
2426 int using_pio = (dev->flags & ATA_DFLAG_PIO);
542b1444 2427 int nodata = (scmd->sc_data_direction == DMA_NONE);
1da177e4 2428
2e5704f6
TH		 2429 memset(qc->cdb, 0, dev->cdb_len);
2430 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2431
2432 qc->complete_fn = atapi_qc_complete;
2433
2434 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2435 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2436 qc->tf.flags |= ATA_TFLAG_WRITE;
2437 DPRINTK("direction: write\n");
2438 }
2439
2440 qc->tf.command = ATA_CMD_PACKET;
7120165c 2441 qc->nbytes = scsi_bufflen(scmd);
e00f1ff3
TH		 2442
2443 /* check whether ATAPI DMA is safe */
2444 if (!using_pio && ata_check_atapi_dma(qc))
2445 using_pio = 1;
1da177e4 2446
1da177e4 2447 if (using_pio || nodata) {
e00f1ff3 2448 /* no data, or PIO data xfer */
1da177e4
LT		 2449 if (nodata)
2450 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2451 else
2452 qc->tf.protocol = ATA_PROT_ATAPI;
2453 qc->tf.lbam = (8 * 1024) & 0xff;
2454 qc->tf.lbah = (8 * 1024) >> 8;
e00f1ff3
TH		 2455 } else {
2456 /* DMA data xfer */
1da177e4
LT		 2457 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2458 qc->tf.feature |= ATAPI_PKT_DMA;
2459
542b1444 2460 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2461 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2462 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2463 }
2464
1da177e4
LT		 2465 return 0;
2466}
2467
41bda9c9 2468static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2469{
41bda9c9
TH		 2470 if (ap->nr_pmp_links == 0) {
2471 if (likely(devno < ata_link_max_devices(&ap->link)))
2472 return &ap->link.device[devno];
2473 } else {
2474 if (likely(devno < ap->nr_pmp_links))
2475 return &ap->pmp_link[devno].device[0];
2476 }
2477
ab5b3a5b
TH		 2478 return NULL;
2479}
2480
2481static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2482 const struct scsi_device *scsidev)
2483{
41bda9c9
TH		 2484 int devno;
2485
ab5b3a5b 2486 /* skip commands not addressed to targets we simulate */
41bda9c9
TH		 2487 if (ap->nr_pmp_links == 0) {
2488 if (unlikely(scsidev->channel || scsidev->lun))
2489 return NULL;
2490 devno = scsidev->id;
2491 } else {
2492 if (unlikely(scsidev->id || scsidev->lun))
2493 return NULL;
2494 devno = scsidev->channel;
2495 }
ab5b3a5b 2496
41bda9c9 2497 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2498}
2499
99ba9e09
BK		 2500/**
2501 * ata_scsi_dev_enabled - determine if device is enabled
2502 * @dev: ATA device
2503 *
2504 * Determine if commands should be sent to the specified device.
2505 *
2506 * LOCKING:
cca3974e 2507 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2508 *
2509 * RETURNS:
2510 * 0 if commands are not allowed / 1 if commands are allowed
2511 */
2512
2513static int ata_scsi_dev_enabled(struct ata_device *dev)
2514{
2515 if (unlikely(!ata_dev_enabled(dev)))
2516 return 0;
2517
9af5c9c9 2518 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
99ba9e09
BK		 2519 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2520 ata_dev_printk(dev, KERN_WARNING,
2521 "WARNING: ATAPI is %s, device ignored.\n",
2522 atapi_enabled ? "not supported with this driver" : "disabled");
2523 return 0;
2524 }
2525 }
2526
2527 return 1;
2528}
2529
1da177e4
LT		 2530/**
2531 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2532 * @ap: ATA port to which the device is attached
2533 * @scsidev: SCSI device from which we derive the ATA device
2534 *
2535 * Given various information provided in struct scsi_cmnd,
2536 * map that onto an ATA bus, and using that mapping
2537 * determine which ata_device is associated with the
2538 * SCSI command to be sent.
2539 *
2540 * LOCKING:
cca3974e 2541 * spin_lock_irqsave(host lock)
1da177e4
LT		 2542 *
2543 * RETURNS:
2544 * Associated ATA device, or %NULL if not found.
2545 */
1da177e4 2546static struct ata_device *
057ace5e 2547ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2548{
ab5b3a5b 2549 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2550
99ba9e09 2551 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2552 return NULL;
2553
1da177e4
LT		 2554 return dev;
2555}
2556
b095518e
JG		 2557/*
2558 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2559 * @byte1: Byte 1 from pass-thru CDB.
2560 *
2561 * RETURNS:
2562 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2563 */
2564static u8
2565ata_scsi_map_proto(u8 byte1)
2566{
2567 switch((byte1 & 0x1e) >> 1) {
2568 case 3: /* Non-data */
2569 return ATA_PROT_NODATA;
2570
2571 case 6: /* DMA */
23cb1d71
AL		 2572 case 10: /* UDMA Data-in */
2573 case 11: /* UDMA Data-Out */
b095518e
JG		 2574 return ATA_PROT_DMA;
2575
2576 case 4: /* PIO Data-in */
2577 case 5: /* PIO Data-out */
b095518e
JG		 2578 return ATA_PROT_PIO;
2579
b095518e
JG		 2580 case 0: /* Hard Reset */
2581 case 1: /* SRST */
f93f1078
AL		 2582 case 8: /* Device Diagnostic */
2583 case 9: /* Device Reset */
2584 case 7: /* DMA Queued */
f93f1078
AL		 2585 case 12: /* FPDMA */
2586 case 15: /* Return Response Info */
b095518e
JG		 2587 default: /* Reserved */
2588 break;
2589 }
2590
2591 return ATA_PROT_UNKNOWN;
2592}
2593
2594/**
2595 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2596 * @qc: command structure to be initialized
b095518e
JG		 2597 *
2598 * Handles either 12 or 16-byte versions of the CDB.
2599 *
2600 * RETURNS:
2601 * Zero on success, non-zero on failure.
2602 */
ad706991 2603static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2604{
2605 struct ata_taskfile *tf = &(qc->tf);
542b1444 2606 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2607 struct ata_device *dev = qc->dev;
ad706991 2608 const u8 *cdb = scmd->cmnd;
b095518e 2609
542b1444 2610 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2611 goto invalid_fld;
8190bdb9 2612
f79d409f
AC		 2613 /* We may not issue DMA commands if no DMA mode is set */
2614 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2615 goto invalid_fld;
b095518e
JG		 2616
2617 /*
2618 * 12 and 16 byte CDBs use different offsets to
2619 * provide the various register values.
2620 */
542b1444 2621 if (cdb[0] == ATA_16) {
b095518e
JG		 2622 /*
2623 * 16-byte CDB - may contain extended commands.
2624 *
2625 * If that is the case, copy the upper byte register values.
2626 */
542b1444
TH		 2627 if (cdb[1] & 0x01) {
2628 tf->hob_feature = cdb[3];
2629 tf->hob_nsect = cdb[5];
2630 tf->hob_lbal = cdb[7];
2631 tf->hob_lbam = cdb[9];
2632 tf->hob_lbah = cdb[11];
b095518e
JG		 2633 tf->flags |= ATA_TFLAG_LBA48;
2634 } else
2635 tf->flags &= ~ATA_TFLAG_LBA48;
2636
2637 /*
2638 * Always copy low byte, device and command registers.
2639 */
542b1444
TH		 2640 tf->feature = cdb[4];
2641 tf->nsect = cdb[6];
2642 tf->lbal = cdb[8];
2643 tf->lbam = cdb[10];
2644 tf->lbah = cdb[12];
2645 tf->device = cdb[13];
2646 tf->command = cdb[14];
b095518e
JG		 2647 } else {
2648 /*
2649 * 12-byte CDB - incapable of extended commands.
2650 */
2651 tf->flags &= ~ATA_TFLAG_LBA48;
2652
542b1444
TH		 2653 tf->feature = cdb[3];
2654 tf->nsect = cdb[4];
2655 tf->lbal = cdb[5];
2656 tf->lbam = cdb[6];
2657 tf->lbah = cdb[7];
2658 tf->device = cdb[8];
2659 tf->command = cdb[9];
b095518e 2660 }
fa4453c4
AL		 2661
2662 /* enforce correct master/slave bit */
2663 tf->device = dev->devno ?
2664 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2665
1dce589c
AL		 2666 /* sanity check for pio multi commands */
2667 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2668 goto invalid_fld;
2669
2670 if (is_multi_taskfile(tf)) {
2671 unsigned int multi_count = 1 << (cdb[1] >> 5);
2672
2673 /* compare the passed through multi_count
2674 * with the cached multi_count of libata
2675 */
2676 if (multi_count != dev->multi_count)
2677 ata_dev_printk(dev, KERN_WARNING,
2678 "invalid multi_count %u ignored\n",
2679 multi_count);
d26fc955 2680 }
1dce589c 2681
5a5dbd18
ML		 2682 /* READ/WRITE LONG use a non-standard sect_size */
2683 qc->sect_size = ATA_SECT_SIZE;
2684 switch (tf->command) {
2685 case ATA_CMD_READ_LONG:
2686 case ATA_CMD_READ_LONG_ONCE:
2687 case ATA_CMD_WRITE_LONG:
2688 case ATA_CMD_WRITE_LONG_ONCE:
2689 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2690 goto invalid_fld;
7120165c 2691 qc->sect_size = scsi_bufflen(scmd);
5a5dbd18
ML		 2692 }
2693
b095518e
JG		 2694 /*
2695 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2696 * SET_FEATURES - XFER MODE must be preceded/succeeded
2697 * by an update to hardware-specific registers for each
2698 * controller (i.e. the reason for ->set_piomode(),
2699 * ->set_dmamode(), and ->post_set_mode() hooks).
2700 */
2701 if ((tf->command == ATA_CMD_SET_FEATURES)
2702 && (tf->feature == SETFEATURES_XFER))
9a405257 2703 goto invalid_fld;
b095518e
JG		 2704
2705 /*
2706 * Set flags so that all registers will be written,
2707 * and pass on write indication (used for PIO/DMA
2708 * setup.)
2709 */
2710 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2711
542b1444 2712 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2713 tf->flags |= ATA_TFLAG_WRITE;
2714
2715 /*
2716 * Set transfer length.
2717 *
2718 * TODO: find out if we need to do more here to
2719 * cover scatter/gather case.
2720 */
7120165c 2721 qc->nbytes = scsi_bufflen(scmd);
b095518e 2722
e61e0672
TH		 2723 /* request result TF */
2724 qc->flags |= ATA_QCFLAG_RESULT_TF;
2725
b095518e 2726 return 0;
9a405257
TH		 2727
2728 invalid_fld:
542b1444 2729 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2730 /* "Invalid field in cdb" */
2731 return 1;
b095518e
JG		 2732}
2733
1da177e4
LT		 2734/**
2735 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2736 * @dev: ATA device
2737 * @cmd: SCSI command opcode to consider
2738 *
2739 * Look up the SCSI command given, and determine whether the
2740 * SCSI command is to be translated or simulated.
2741 *
2742 * RETURNS:
2743 * Pointer to translation function if possible, %NULL if not.
2744 */
2745
2746static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2747{
2748 switch (cmd) {
2749 case READ_6:
2750 case READ_10:
2751 case READ_16:
2752
2753 case WRITE_6:
2754 case WRITE_10:
2755 case WRITE_16:
2756 return ata_scsi_rw_xlat;
2757
2758 case SYNCHRONIZE_CACHE:
2759 if (ata_try_flush_cache(dev))
2760 return ata_scsi_flush_xlat;
2761 break;
2762
2763 case VERIFY:
2764 case VERIFY_16:
2765 return ata_scsi_verify_xlat;
b095518e
JG		 2766
2767 case ATA_12:
2768 case ATA_16:
2769 return ata_scsi_pass_thru;
da61396d 2770
972dcafb
DG		 2771 case START_STOP:
2772 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2773 }
2774
2775 return NULL;
2776}
2777
2778/**
2779 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2780 * @ap: ATA port to which the command was being sent
2781 * @cmd: SCSI command to dump
2782 *
2783 * Prints the contents of a SCSI command via printk().
2784 */
2785
2786static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2787 struct scsi_cmnd *cmd)
2788{
2789#ifdef ATA_DEBUG
2790 struct scsi_device *scsidev = cmd->device;
2791 u8 *scsicmd = cmd->cmnd;
2792
2793 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2794 ap->print_id,
1da177e4
LT		 2795 scsidev->channel, scsidev->id, scsidev->lun,
2796 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2797 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2798 scsicmd[8]);
2799#endif
2800}
2801
542b1444 2802static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 2803 void (*done)(struct scsi_cmnd *),
2804 struct ata_device *dev)
eb3f0f9c 2805{
baf4fdfa
ML		 2806 u8 scsi_op = scmd->cmnd[0];
2807 ata_xlat_func_t xlat_func;
2115ea94
TH		 2808 int rc = 0;
2809
eb3f0f9c 2810 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 2811 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2812 goto bad_cdb_len;
eb3f0f9c 2813
baf4fdfa
ML		 2814 xlat_func = ata_get_xlat_func(dev, scsi_op);
2815 } else {
2816 if (unlikely(!scmd->cmd_len))
2817 goto bad_cdb_len;
2818
2819 xlat_func = NULL;
2820 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2821 /* relay SCSI command to ATAPI device */
2822 if (unlikely(scmd->cmd_len > dev->cdb_len))
2823 goto bad_cdb_len;
2824
2825 xlat_func = atapi_xlat;
2826 } else {
2827 /* ATA_16 passthru, treat as an ATA command */
2828 if (unlikely(scmd->cmd_len > 16))
2829 goto bad_cdb_len;
2830
2831 xlat_func = ata_get_xlat_func(dev, scsi_op);
2832 }
2833 }
2834
2835 if (xlat_func)
2836 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2837 else
2838 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 2839
2840 return rc;
baf4fdfa
ML		 2841
2842 bad_cdb_len:
2843 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2844 scmd->cmd_len, scsi_op, dev->cdb_len);
2845 scmd->result = DID_ERROR << 16;
2846 done(scmd);
2847 return 0;
eb3f0f9c
BK		 2848}
2849
1da177e4
LT		 2850/**
2851 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2852 * @cmd: SCSI command to be sent
2853 * @done: Completion function, called when command is complete
2854 *
2855 * In some cases, this function translates SCSI commands into
2856 * ATA taskfiles, and queues the taskfiles to be sent to
2857 * hardware. In other cases, this function simulates a
2858 * SCSI device by evaluating and responding to certain
2859 * SCSI commands. This creates the overall effect of
2860 * ATA and ATAPI devices appearing as SCSI devices.
2861 *
2862 * LOCKING:
cca3974e 2863 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2864 *
2865 * RETURNS:
2115ea94
TH		 2866 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2867 * 0 otherwise.
1da177e4 2868 */
1da177e4
LT		 2869int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2870{
2871 struct ata_port *ap;
2872 struct ata_device *dev;
2873 struct scsi_device *scsidev = cmd->device;
005a5a06 2874 struct Scsi_Host *shost = scsidev->host;
2115ea94 2875 int rc = 0;
1da177e4 2876
35bb94b1 2877 ap = ata_shost_to_port(shost);
005a5a06
JG		 2878
2879 spin_unlock(shost->host_lock);
ba6a1308 2880 spin_lock(ap->lock);
1da177e4
LT		 2881
2882 ata_scsi_dump_cdb(ap, cmd);
2883
2884 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2885 if (likely(dev))
2115ea94 2886 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2887 else {
1da177e4
LT		 2888 cmd->result = (DID_BAD_TARGET << 16);
2889 done(cmd);
1da177e4
LT		 2890 }
2891
ba6a1308 2892 spin_unlock(ap->lock);
005a5a06 2893 spin_lock(shost->host_lock);
2115ea94 2894 return rc;
1da177e4
LT		 2895}
2896
2897/**
2898 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2899 * @dev: the target device
1da177e4
LT		 2900 * @cmd: SCSI command being sent to device.
2901 * @done: SCSI command completion function.
2902 *
2903 * Interprets and directly executes a select list of SCSI commands
2904 * that can be handled internally.
2905 *
2906 * LOCKING:
cca3974e 2907 * spin_lock_irqsave(host lock)
1da177e4
LT		 2908 */
2909
3373efd8 2910void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2911 void (*done)(struct scsi_cmnd *))
2912{
2913 struct ata_scsi_args args;
057ace5e 2914 const u8 *scsicmd = cmd->cmnd;
45394145 2915 u8 tmp8;
1da177e4 2916
9a3dccc4
TH		 2917 args.dev = dev;
2918 args.id = dev->id;
1da177e4
LT		 2919 args.cmd = cmd;
2920 args.done = done;
2921
2922 switch(scsicmd[0]) {
00bd0202
JG		 2923 /* TODO: worth improving? */
2924 case FORMAT_UNIT:
2925 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2926 break;
2927
2928 case INQUIRY:
2929 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2930 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2931 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2932 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
ad355b46
JG		 2933 else switch (scsicmd[2]) {
2934 case 0x00:
1da177e4 2935 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
ad355b46
JG		 2936 break;
2937 case 0x80:
1da177e4 2938 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
ad355b46
JG		 2939 break;
2940 case 0x83:
1da177e4 2941 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
ad355b46
JG		 2942 break;
2943 case 0x89:
2944 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2945 break;
2946 default:
ae006510 2947 ata_scsi_invalid_field(cmd, done);
ad355b46
JG		 2948 break;
2949 }
1da177e4
LT		 2950 break;
2951
2952 case MODE_SENSE:
2953 case MODE_SENSE_10:
2954 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2955 break;
2956
2957 case MODE_SELECT: /* unconditionally return */
2958 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2959 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2960 break;
2961
2962 case READ_CAPACITY:
2963 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2964 break;
2965
2966 case SERVICE_ACTION_IN:
2967 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2968 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2969 else
ae006510 2970 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2971 break;
2972
2973 case REPORT_LUNS:
2974 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2975 break;
2976
1da177e4 2977 case REQUEST_SENSE:
45394145
JG		 2978 ata_scsi_set_sense(cmd, 0, 0, 0);
2979 cmd->result = (DRIVER_SENSE << 24);
2980 done(cmd);
2981 break;
2982
00bd0202
JG		 2983 /* if we reach this, then writeback caching is disabled,
2984 * turning this into a no-op.
2985 */
2986 case SYNCHRONIZE_CACHE:
2987 /* fall through */
2988
2989 /* no-op's, complete with success */
2990 case REZERO_UNIT:
2991 case SEEK_6:
2992 case SEEK_10:
2993 case TEST_UNIT_READY:
2994 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2995 break;
2996
45394145
JG		 2997 case SEND_DIAGNOSTIC:
2998 tmp8 = scsicmd[1] & ~(1 << 3);
2999 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3000 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3001 else
3002 ata_scsi_invalid_field(cmd, done);
3003 break;
1da177e4
LT		 3004
3005 /* all other commands */
3006 default:
ae006510
DG		 3007 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3008 /* "Invalid command operation code" */
3009 done(cmd);
1da177e4
LT		 3010 break;
3011 }
3012}
3013
f3187195
TH		 3014int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3015{
3016 int i, rc;
3017
3018 for (i = 0; i < host->n_ports; i++) {
3019 struct ata_port *ap = host->ports[i];
3020 struct Scsi_Host *shost;
3021
3022 rc = -ENOMEM;
3023 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3024 if (!shost)
3025 goto err_alloc;
3026
3027 *(struct ata_port **)&shost->hostdata[0] = ap;
3028 ap->scsi_host = shost;
3029
3030 shost->transportt = &ata_scsi_transport_template;
3031 shost->unique_id = ap->print_id;
3032 shost->max_id = 16;
3033 shost->max_lun = 1;
3034 shost->max_channel = 1;
3035 shost->max_cmd_len = 16;
3036
3037 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3038 if (rc)
3039 goto err_add;
3040 }
3041
3042 return 0;
3043
3044 err_add:
3045 scsi_host_put(host->ports[i]->scsi_host);
3046 err_alloc:
3047 while (--i >= 0) {
3048 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3049
3050 scsi_remove_host(shost);
3051 scsi_host_put(shost);
3052 }
3053 return rc;
3054}
3055
1ae46317 3056void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3057{
1ae46317
TH		 3058 int tries = 5;
3059 struct ata_device *last_failed_dev = NULL;
41bda9c9 3060 struct ata_link *link;
1ae46317 3061 struct ata_device *dev;
644dd0cc 3062
198e0fed 3063 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 3064 return;
3065
1ae46317 3066 repeat:
41bda9c9
TH		 3067 ata_port_for_each_link(link, ap) {
3068 ata_link_for_each_dev(dev, link) {
3069 struct scsi_device *sdev;
3070 int channel = 0, id = 0;
3edebac4 3071
41bda9c9
TH		 3072 if (!ata_dev_enabled(dev) || dev->sdev)
3073 continue;
3f19ee8c 3074
41bda9c9
TH		 3075 if (ata_is_host_link(link))
3076 id = dev->devno;
3077 else
3078 channel = link->pmp;
3079
3080 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3081 NULL);
3082 if (!IS_ERR(sdev)) {
3083 dev->sdev = sdev;
3084 scsi_device_put(sdev);
3085 }
3edebac4 3086 }
3f19ee8c 3087 }
1ae46317
TH		 3088
3089 /* If we scanned while EH was in progress or allocation
3090 * failure occurred, scan would have failed silently. Check
3091 * whether all devices are attached.
3092 */
41bda9c9
TH		 3093 ata_port_for_each_link(link, ap) {
3094 ata_link_for_each_dev(dev, link) {
3095 if (ata_dev_enabled(dev) && !dev->sdev)
3096 goto exit_loop;
3097 }
1ae46317 3098 }
41bda9c9
TH		 3099 exit_loop:
3100 if (!link)
1ae46317
TH		 3101 return;
3102
3103 /* we're missing some SCSI devices */
3104 if (sync) {
3105 /* If caller requested synchrnous scan && we've made
3106 * any progress, sleep briefly and repeat.
3107 */
3108 if (dev != last_failed_dev) {
3109 msleep(100);
3110 last_failed_dev = dev;
3111 goto repeat;
3112 }
3113
3114 /* We might be failing to detect boot device, give it
3115 * a few more chances.
3116 */
3117 if (--tries) {
3118 msleep(100);
3119 goto repeat;
3120 }
3121
3122 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3123 "failed without making any progress,\n"
3124 " switching to async\n");
3125 }
3126
3127 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3128 round_jiffies_relative(HZ));
644dd0cc 3129}
0ea035a3
TH		 3130
3131/**
3132 * ata_scsi_offline_dev - offline attached SCSI device
3133 * @dev: ATA device to offline attached SCSI device for
3134 *
3135 * This function is called from ata_eh_hotplug() and responsible
3136 * for taking the SCSI device attached to @dev offline. This
cca3974e 3137 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3138 * against clearing.
3139 *
3140 * LOCKING:
cca3974e 3141 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3142 *
3143 * RETURNS:
3144 * 1 if attached SCSI device exists, 0 otherwise.
3145 */
3146int ata_scsi_offline_dev(struct ata_device *dev)
3147{
3148 if (dev->sdev) {
3149 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3150 return 1;
3151 }
3152 return 0;
3153}
580b2102
TH		 3154
3155/**
3156 * ata_scsi_remove_dev - remove attached SCSI device
3157 * @dev: ATA device to remove attached SCSI device for
3158 *
3159 * This function is called from ata_eh_scsi_hotplug() and
3160 * responsible for removing the SCSI device attached to @dev.
3161 *
3162 * LOCKING:
3163 * Kernel thread context (may sleep).
3164 */
3165static void ata_scsi_remove_dev(struct ata_device *dev)
3166{
9af5c9c9 3167 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3168 struct scsi_device *sdev;
3169 unsigned long flags;
3170
3171 /* Alas, we need to grab scan_mutex to ensure SCSI device
3172 * state doesn't change underneath us and thus
3173 * scsi_device_get() always succeeds. The mutex locking can
3174 * be removed if there is __scsi_device_get() interface which
3175 * increments reference counts regardless of device state.
3176 */
cca3974e 3177 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3178 spin_lock_irqsave(ap->lock, flags);
580b2102 3179
cca3974e 3180 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3181 sdev = dev->sdev;
3182 dev->sdev = NULL;
3183
3184 if (sdev) {
3185 /* If user initiated unplug races with us, sdev can go
cca3974e 3186 * away underneath us after the host lock and
580b2102
TH		 3187 * scan_mutex are released. Hold onto it.
3188 */
3189 if (scsi_device_get(sdev) == 0) {
3190 /* The following ensures the attached sdev is
3191 * offline on return from ata_scsi_offline_dev()
3192 * regardless it wins or loses the race
3193 * against this function.
3194 */
3195 scsi_device_set_state(sdev, SDEV_OFFLINE);
3196 } else {
3197 WARN_ON(1);
3198 sdev = NULL;
3199 }
3200 }
3201
ba6a1308 3202 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3203 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3204
3205 if (sdev) {
3206 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3207 sdev->sdev_gendev.bus_id);
3208
3209 scsi_remove_device(sdev);
3210 scsi_device_put(sdev);
3211 }
3212}
3213
41bda9c9
TH		 3214static void ata_scsi_handle_link_detach(struct ata_link *link)
3215{
3216 struct ata_port *ap = link->ap;
3217 struct ata_device *dev;
3218
3219 ata_link_for_each_dev(dev, link) {
3220 unsigned long flags;
3221
3222 if (!(dev->flags & ATA_DFLAG_DETACHED))
3223 continue;
3224
3225 spin_lock_irqsave(ap->lock, flags);
3226 dev->flags &= ~ATA_DFLAG_DETACHED;
3227 spin_unlock_irqrestore(ap->lock, flags);
3228
3229 ata_scsi_remove_dev(dev);
3230 }
3231}
3232
2f294968
KCA		 3233/**
3234 * ata_scsi_media_change_notify - send media change event
3235 * @atadev: Pointer to the disk device with media change event
3236 *
3237 * Tell the block layer to send a media change notification
3238 * event.
3239 *
3240 * LOCKING:
3241 * interrupt context, may not sleep.
3242 */
3243void ata_scsi_media_change_notify(struct ata_device *atadev)
3244{
3245#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3246 scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
3247#endif
3248}
3249EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
3250
580b2102
TH		 3251/**
3252 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3253 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3254 *
3255 * Perform SCSI part of hotplug. It's executed from a separate
3256 * workqueue after EH completes. This is necessary because SCSI
3257 * hot plugging requires working EH and hot unplugging is
3258 * synchronized with hot plugging with a mutex.
3259 *
3260 * LOCKING:
3261 * Kernel thread context (may sleep).
3262 */
65f27f38 3263void ata_scsi_hotplug(struct work_struct *work)
580b2102 3264{
65f27f38
DH		 3265 struct ata_port *ap =
3266 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3267 int i;
580b2102 3268
b51e9e5d 3269 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3270 DPRINTK("ENTER/EXIT - unloading\n");
3271 return;
3272 }
3273
3274 DPRINTK("ENTER\n");
3275
41bda9c9
TH		 3276 /* Unplug detached devices. We cannot use link iterator here
3277 * because PMP links have to be scanned even if PMP is
3278 * currently not attached. Iterate manually.
3279 */
3280 ata_scsi_handle_link_detach(&ap->link);
3281 if (ap->pmp_link)
3282 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3283 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3284
3285 /* scan for new ones */
1ae46317 3286 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3287
3288 DPRINTK("EXIT\n");
3289}
83c47bcb
TH		 3290
3291/**
3292 * ata_scsi_user_scan - indication for user-initiated bus scan
3293 * @shost: SCSI host to scan
3294 * @channel: Channel to scan
3295 * @id: ID to scan
3296 * @lun: LUN to scan
3297 *
3298 * This function is called when user explicitly requests bus
3299 * scan. Set probe pending flag and invoke EH.
3300 *
3301 * LOCKING:
3302 * SCSI layer (we don't care)
3303 *
3304 * RETURNS:
3305 * Zero.
3306 */
3307static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3308 unsigned int id, unsigned int lun)
3309{
3310 struct ata_port *ap = ata_shost_to_port(shost);
3311 unsigned long flags;
41bda9c9 3312 int devno, rc = 0;
83c47bcb
TH		 3313
3314 if (!ap->ops->error_handler)
3315 return -EOPNOTSUPP;
3316
41bda9c9 3317 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3318 return -EINVAL;
3319
41bda9c9
TH		 3320 if (ap->nr_pmp_links == 0) {
3321 if (channel != SCAN_WILD_CARD && channel)
3322 return -EINVAL;
3323 devno = id;
3324 } else {
3325 if (id != SCAN_WILD_CARD && id)
3326 return -EINVAL;
3327 devno = channel;
3328 }
3329
ba6a1308 3330 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3331
41bda9c9
TH		 3332 if (devno == SCAN_WILD_CARD) {
3333 struct ata_link *link;
3334
3335 ata_port_for_each_link(link, ap) {
3336 struct ata_eh_info *ehi = &link->eh_info;
3337 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3338 ehi->action |= ATA_EH_SOFTRESET;
3339 }
83c47bcb 3340 } else {
41bda9c9 3341 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3342
3343 if (dev) {
41bda9c9 3344 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9
TH		 3345 ehi->probe_mask |= 1 << dev->devno;
3346 ehi->action |= ATA_EH_SOFTRESET;
3347 ehi->flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3348 } else
3349 rc = -EINVAL;
3350 }
3351
309afcb5 3352 if (rc == 0) {
83c47bcb 3353 ata_port_schedule_eh(ap);
309afcb5
TH		 3354 spin_unlock_irqrestore(ap->lock, flags);
3355 ata_port_wait_eh(ap);
3356 } else
3357 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3358
3359 return rc;
3360}
3057ac3c 3361
3362/**
d0171269 3363 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3364 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3365 *
d0171269
TH		 3366 * After ATA pass thru (SAT) commands are executed successfully,
3367 * libata need to propagate the changes to SCSI layer. This
3368 * function must be executed from ata_aux_wq such that sdev
3369 * attach/detach don't race with rescan.
3057ac3c 3370 *
d0171269
TH		 3371 * LOCKING:
3372 * Kernel thread context (may sleep).
3057ac3c 3373 */
65f27f38 3374void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3375{
65f27f38
DH		 3376 struct ata_port *ap =
3377 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3378 struct ata_link *link;
f58229f8 3379 struct ata_device *dev;
f84e7e41 3380 unsigned long flags;
3057ac3c 3381
f84e7e41
TH		 3382 spin_lock_irqsave(ap->lock, flags);
3383
41bda9c9
TH		 3384 ata_port_for_each_link(link, ap) {
3385 ata_link_for_each_dev(dev, link) {
3386 struct scsi_device *sdev = dev->sdev;
3057ac3c 3387
41bda9c9
TH		 3388 if (!ata_dev_enabled(dev) || !sdev)
3389 continue;
3390 if (scsi_device_get(sdev))
3391 continue;
f84e7e41 3392
41bda9c9
TH		 3393 spin_unlock_irqrestore(ap->lock, flags);
3394 scsi_rescan_device(&(sdev->sdev_gendev));
3395 scsi_device_put(sdev);
3396 spin_lock_irqsave(ap->lock, flags);
3397 }
3057ac3c 3398 }
f84e7e41
TH		 3399
3400 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3401}
80289167
BK		 3402
3403/**
3404 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3405 * @host: ATA host container for all SAS ports
80289167 3406 * @port_info: Information from low-level host driver
cca3974e 3407 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3408 *
3409 * LOCKING:
3410 * PCI/etc. bus probe sem.
3411 *
3412 * RETURNS:
3413 * ata_port pointer on success / NULL on failure.
3414 */
3415
cca3974e 3416struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3417 struct ata_port_info *port_info,
cca3974e 3418 struct Scsi_Host *shost)
80289167 3419{
f3187195 3420 struct ata_port *ap;
80289167 3421
f3187195 3422 ap = ata_port_alloc(host);
80289167
BK		 3423 if (!ap)
3424 return NULL;
3425
f3187195 3426 ap->port_no = 0;
cca3974e 3427 ap->lock = shost->host_lock;
f3187195
TH		 3428 ap->pio_mask = port_info->pio_mask;
3429 ap->mwdma_mask = port_info->mwdma_mask;
3430 ap->udma_mask = port_info->udma_mask;
3431 ap->flags |= port_info->flags;
3432 ap->ops = port_info->port_ops;
3433 ap->cbl = ATA_CBL_SATA;
3434
80289167
BK		 3435 return ap;
3436}
3437EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3438
3439/**
3440 * ata_sas_port_start - Set port up for dma.
3441 * @ap: Port to initialize
3442 *
3443 * Called just after data structures for each port are
3444 * initialized. Allocates DMA pad.
3445 *
3446 * May be used as the port_start() entry in ata_port_operations.
3447 *
3448 * LOCKING:
3449 * Inherited from caller.
3450 */
3451int ata_sas_port_start(struct ata_port *ap)
3452{
3453 return ata_pad_alloc(ap, ap->dev);
3454}
3455EXPORT_SYMBOL_GPL(ata_sas_port_start);
3456
3457/**
3458 * ata_port_stop - Undo ata_sas_port_start()
3459 * @ap: Port to shut down
3460 *
3461 * Frees the DMA pad.
3462 *
3463 * May be used as the port_stop() entry in ata_port_operations.
3464 *
3465 * LOCKING:
3466 * Inherited from caller.
3467 */
3468
3469void ata_sas_port_stop(struct ata_port *ap)
3470{
3471 ata_pad_free(ap, ap->dev);
3472}
3473EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3474
3475/**
3476 * ata_sas_port_init - Initialize a SATA device
3477 * @ap: SATA port to initialize
3478 *
3479 * LOCKING:
3480 * PCI/etc. bus probe sem.
3481 *
3482 * RETURNS:
3483 * Zero on success, non-zero on error.
3484 */
3485
3486int ata_sas_port_init(struct ata_port *ap)
3487{
3488 int rc = ap->ops->port_start(ap);
3489
f3187195
TH		 3490 if (!rc) {
3491 ap->print_id = ata_print_id++;
80289167 3492 rc = ata_bus_probe(ap);
f3187195 3493 }
80289167
BK		 3494
3495 return rc;
3496}
3497EXPORT_SYMBOL_GPL(ata_sas_port_init);
3498
3499/**
3500 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3501 * @ap: SATA port to destroy
3502 *
3503 */
3504
3505void ata_sas_port_destroy(struct ata_port *ap)
3506{
f0d36efd
TH		 3507 if (ap->ops->port_stop)
3508 ap->ops->port_stop(ap);
80289167
BK		 3509 kfree(ap);
3510}
3511EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3512
3513/**
3514 * ata_sas_slave_configure - Default slave_config routine for libata devices
3515 * @sdev: SCSI device to configure
3516 * @ap: ATA port to which SCSI device is attached
3517 *
3518 * RETURNS:
3519 * Zero.
3520 */
3521
3522int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3523{
3524 ata_scsi_sdev_config(sdev);
9af5c9c9 3525 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3526 return 0;
3527}
3528EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3529
3530/**
3531 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3532 * @cmd: SCSI command to be sent
3533 * @done: Completion function, called when command is complete
3534 * @ap: ATA port to which the command is being sent
3535 *
3536 * RETURNS:
08475a19
BK		 3537 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3538 * 0 otherwise.
80289167
BK		 3539 */
3540
3541int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3542 struct ata_port *ap)
3543{
08475a19
BK		 3544 int rc = 0;
3545
80289167
BK		 3546 ata_scsi_dump_cdb(ap, cmd);
3547
9af5c9c9
TH		 3548 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3549 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3550 else {
3551 cmd->result = (DID_BAD_TARGET << 16);
3552 done(cmd);
3553 }
08475a19 3554 return rc;
80289167
BK		 3555}
3556EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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