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libata-pmp-prep: implement EH fast-fail path
[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
24f75686 74static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
00ac37f5
DG		 75 RW_RECOVERY_MPAGE,
76 RW_RECOVERY_MPAGE_LEN - 2,
24f75686 77 (1 << 7), /* AWRE */
00ac37f5
DG		 78 0, /* read retry count */
79 0, 0, 0, 0,
80 0, /* write retry count */
81 0, 0, 0
82};
83
84static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
85 CACHE_MPAGE,
86 CACHE_MPAGE_LEN - 2,
87 0, /* contains WCE, needs to be 0 for logic */
88 0, 0, 0, 0, 0, 0, 0, 0, 0,
89 0, /* contains DRA, needs to be 0 for logic */
90 0, 0, 0, 0, 0, 0, 0
91};
92
93static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
94 CONTROL_MPAGE,
95 CONTROL_MPAGE_LEN - 2,
96 2, /* DSENSE=0, GLTSD=1 */
97 0, /* [QAM+QERR may be 1, see 05-359r1] */
98 0, 0, 0, 0, 0xff, 0xff,
99 0, 30 /* extended self test time, see 05-359r1 */
100};
101
30afc84c
TH		 102/*
103 * libata transport template. libata doesn't do real transport stuff.
104 * It just needs the eh_timed_out hook.
105 */
f3187195 106static struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 107 .eh_strategy_handler = ata_scsi_error,
30afc84c 108 .eh_timed_out = ata_scsi_timed_out,
ccf68c34 109 .user_scan = ata_scsi_user_scan,
30afc84c
TH		 110};
111
1da177e4 112
ae006510
DG		 113static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
114 void (*done)(struct scsi_cmnd *))
115{
116 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
117 /* "Invalid field in cbd" */
118 done(cmd);
119}
120
1da177e4
LT		 121/**
122 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
123 * @sdev: SCSI device for which BIOS geometry is to be determined
124 * @bdev: block device associated with @sdev
125 * @capacity: capacity of SCSI device
126 * @geom: location to which geometry will be output
127 *
128 * Generic bios head/sector/cylinder calculator
129 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
130 * mapping. Some situations may arise where the disk is not
131 * bootable if this is not used.
132 *
133 * LOCKING:
134 * Defined by the SCSI layer. We don't really care.
135 *
136 * RETURNS:
137 * Zero.
138 */
139int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
140 sector_t capacity, int geom[])
141{
142 geom[0] = 255;
143 geom[1] = 63;
144 sector_div(capacity, 255*63);
145 geom[2] = capacity;
146
147 return 0;
148}
149
5924b74c
TH		 150/**
151 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
152 * @sdev: SCSI device to get identify data for
153 * @arg: User buffer area for identify data
154 *
155 * LOCKING:
156 * Defined by the SCSI layer. We don't really care.
157 *
158 * RETURNS:
159 * Zero on success, negative errno on error.
160 */
161static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
162{
163 struct ata_port *ap = ata_shost_to_port(sdev->host);
164 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
165 u16 __user *dst = arg;
166 char buf[40];
167
168 if (!dev)
169 return -ENOMSG;
170
171 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
172 return -EFAULT;
173
174 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
175 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
176 return -EFAULT;
177
178 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
179 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
180 return -EFAULT;
181
182 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
183 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
184 return -EFAULT;
185
186 return 0;
187}
188
b095518e
JG		 189/**
190 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 191 * @scsidev: Device to which we are issuing command
b095518e
JG		 192 * @arg: User provided data for issuing command
193 *
194 * LOCKING:
195 * Defined by the SCSI layer. We don't really care.
196 *
197 * RETURNS:
198 * Zero on success, negative errno on error.
199 */
b095518e
JG		 200int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
201{
202 int rc = 0;
203 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 204 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 205 int argsize = 0;
85837ebd 206 enum dma_data_direction data_dir;
bbe1fe7e 207 int cmd_result;
b095518e 208
c893a3ae 209 if (arg == NULL)
b095518e
JG		 210 return -EINVAL;
211
212 if (copy_from_user(args, arg, sizeof(args)))
213 return -EFAULT;
214
bbe1fe7e
ET		 215 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
216 if (!sensebuf)
217 return -ENOMEM;
218
b095518e
JG		 219 memset(scsi_cmd, 0, sizeof(scsi_cmd));
220
221 if (args[3]) {
222 argsize = SECTOR_SIZE * args[3];
223 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 224 if (argbuf == NULL) {
225 rc = -ENOMEM;
226 goto error;
227 }
b095518e
JG		 228
229 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
230 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
231 block count in sector count field */
85837ebd 232 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 233 } else {
234 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 235 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 236 data_dir = DMA_NONE;
b095518e
JG		 237 }
238
239 scsi_cmd[0] = ATA_16;
240
241 scsi_cmd[4] = args[2];
242 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
243 scsi_cmd[6] = args[3];
244 scsi_cmd[8] = args[1];
245 scsi_cmd[10] = 0x4f;
246 scsi_cmd[12] = 0xc2;
247 } else {
248 scsi_cmd[6] = args[1];
249 }
250 scsi_cmd[14] = args[0];
251
252 /* Good values for timeout and retries? Values below
253 from scsi_ioctl_send_command() for default case... */
bbe1fe7e
ET		 254 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
255 sensebuf, (10*HZ), 5, 0);
256
257 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
258 u8 *desc = sensebuf + 8;
259 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
260
261 /* If we set cc then ATA pass-through will cause a
262 * check condition even if no error. Filter that. */
263 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
264 struct scsi_sense_hdr sshdr;
265 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
266 &sshdr);
267 if (sshdr.sense_key==0 &&
268 sshdr.asc==0 && sshdr.ascq==0)
269 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
270 }
271
272 /* Send userspace a few ATA registers (same as drivers/ide) */
273 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
274 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
275 args[0] = desc[13]; /* status */
276 args[1] = desc[3]; /* error */
277 args[2] = desc[5]; /* sector count (0:7) */
278 if (copy_to_user(arg, args, sizeof(args)))
279 rc = -EFAULT;
280 }
281 }
282
283
284 if (cmd_result) {
b095518e
JG		 285 rc = -EIO;
286 goto error;
287 }
288
b095518e 289 if ((argbuf)
c893a3ae 290 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 291 rc = -EFAULT;
292error:
bbe1fe7e 293 kfree(sensebuf);
8f760780 294 kfree(argbuf);
b095518e
JG		 295 return rc;
296}
297
298/**
299 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 300 * @scsidev: Device to which we are issuing command
b095518e
JG		 301 * @arg: User provided data for issuing command
302 *
303 * LOCKING:
304 * Defined by the SCSI layer. We don't really care.
305 *
306 * RETURNS:
307 * Zero on success, negative errno on error.
308 */
309int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
310{
311 int rc = 0;
312 u8 scsi_cmd[MAX_COMMAND_SIZE];
af068bd1
DM		 313 u8 args[7], *sensebuf = NULL;
314 int cmd_result;
b095518e 315
c893a3ae 316 if (arg == NULL)
b095518e
JG		 317 return -EINVAL;
318
319 if (copy_from_user(args, arg, sizeof(args)))
320 return -EFAULT;
321
af068bd1
DM		 322 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
323 if (!sensebuf)
324 return -ENOMEM;
325
b095518e
JG		 326 memset(scsi_cmd, 0, sizeof(scsi_cmd));
327 scsi_cmd[0] = ATA_16;
328 scsi_cmd[1] = (3 << 1); /* Non-data */
af068bd1 329 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
b095518e
JG		 330 scsi_cmd[4] = args[1];
331 scsi_cmd[6] = args[2];
332 scsi_cmd[8] = args[3];
333 scsi_cmd[10] = args[4];
334 scsi_cmd[12] = args[5];
277239f2 335 scsi_cmd[13] = args[6] & 0x4f;
b095518e
JG		 336 scsi_cmd[14] = args[0];
337
b095518e 338 /* Good values for timeout and retries? Values below
2e9edbf8 339 from scsi_ioctl_send_command() for default case... */
af068bd1
DM		 340 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
341 sensebuf, (10*HZ), 5, 0);
342
343 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
344 u8 *desc = sensebuf + 8;
345 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
346
347 /* If we set cc then ATA pass-through will cause a
348 * check condition even if no error. Filter that. */
349 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
350 struct scsi_sense_hdr sshdr;
351 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
352 &sshdr);
353 if (sshdr.sense_key==0 &&
354 sshdr.asc==0 && sshdr.ascq==0)
355 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
356 }
357
358 /* Send userspace ATA registers */
359 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
360 desc[0] == 0x09) {/* code is "ATA Descriptor" */
361 args[0] = desc[13]; /* status */
362 args[1] = desc[3]; /* error */
363 args[2] = desc[5]; /* sector count (0:7) */
364 args[3] = desc[7]; /* lbal */
365 args[4] = desc[9]; /* lbam */
366 args[5] = desc[11]; /* lbah */
367 args[6] = desc[12]; /* select */
368 if (copy_to_user(arg, args, sizeof(args)))
369 rc = -EFAULT;
370 }
371 }
372
373 if (cmd_result) {
b095518e 374 rc = -EIO;
af068bd1
DM		 375 goto error;
376 }
b095518e 377
af068bd1
DM		 378 error:
379 kfree(sensebuf);
b095518e
JG		 380 return rc;
381}
382
1da177e4
LT		 383int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
384{
1da177e4
LT		 385 int val = -EINVAL, rc = -EINVAL;
386
1da177e4
LT		 387 switch (cmd) {
388 case ATA_IOC_GET_IO32:
389 val = 0;
390 if (copy_to_user(arg, &val, 1))
391 return -EFAULT;
392 return 0;
393
394 case ATA_IOC_SET_IO32:
395 val = (unsigned long) arg;
396 if (val != 0)
397 return -EINVAL;
398 return 0;
399
5924b74c
TH		 400 case HDIO_GET_IDENTITY:
401 return ata_get_identity(scsidev, arg);
402
b095518e
JG		 403 case HDIO_DRIVE_CMD:
404 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
405 return -EACCES;
406 return ata_cmd_ioctl(scsidev, arg);
407
408 case HDIO_DRIVE_TASK:
409 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
410 return -EACCES;
411 return ata_task_ioctl(scsidev, arg);
412
1da177e4
LT		 413 default:
414 rc = -ENOTTY;
415 break;
416 }
417
1da177e4
LT		 418 return rc;
419}
420
421/**
422 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 423 * @dev: ATA device to which the new command is attached
424 * @cmd: SCSI command that originated this ATA command
425 * @done: SCSI command completion function
426 *
427 * Obtain a reference to an unused ata_queued_cmd structure,
428 * which is the basic libata structure representing a single
429 * ATA command sent to the hardware.
430 *
431 * If a command was available, fill in the SCSI-specific
432 * portions of the structure with information on the
433 * current command.
434 *
435 * LOCKING:
cca3974e 436 * spin_lock_irqsave(host lock)
1da177e4
LT		 437 *
438 * RETURNS:
439 * Command allocated, or %NULL if none available.
440 */
7102d230
AB		 441static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
442 struct scsi_cmnd *cmd,
443 void (*done)(struct scsi_cmnd *))
1da177e4
LT		 444{
445 struct ata_queued_cmd *qc;
446
3373efd8 447 qc = ata_qc_new_init(dev);
1da177e4
LT		 448 if (qc) {
449 qc->scsicmd = cmd;
450 qc->scsidone = done;
451
7120165c
BH		 452 qc->__sg = scsi_sglist(cmd);
453 qc->n_elem = scsi_sg_count(cmd);
1da177e4
LT		 454 } else {
455 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
456 done(cmd);
457 }
458
459 return qc;
460}
461
b095518e
JG		 462/**
463 * ata_dump_status - user friendly display of error info
464 * @id: id of the port in question
465 * @tf: ptr to filled out taskfile
466 *
467 * Decode and dump the ATA error/status registers for the user so
468 * that they have some idea what really happened at the non
469 * make-believe layer.
470 *
471 * LOCKING:
472 * inherited from caller
473 */
7102d230 474static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
b095518e
JG		 475{
476 u8 stat = tf->command, err = tf->feature;
477
478 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
479 if (stat & ATA_BUSY) {
480 printk("Busy }\n"); /* Data is not valid in this case */
481 } else {
482 if (stat & 0x40) printk("DriveReady ");
483 if (stat & 0x20) printk("DeviceFault ");
484 if (stat & 0x10) printk("SeekComplete ");
485 if (stat & 0x08) printk("DataRequest ");
486 if (stat & 0x04) printk("CorrectedError ");
487 if (stat & 0x02) printk("Index ");
488 if (stat & 0x01) printk("Error ");
489 printk("}\n");
490
491 if (err) {
492 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
493 if (err & 0x04) printk("DriveStatusError ");
494 if (err & 0x80) {
495 if (err & 0x04) printk("BadCRC ");
496 else printk("Sector ");
497 }
498 if (err & 0x40) printk("UncorrectableError ");
499 if (err & 0x10) printk("SectorIdNotFound ");
500 if (err & 0x02) printk("TrackZeroNotFound ");
501 if (err & 0x01) printk("AddrMarkNotFound ");
502 printk("}\n");
503 }
504 }
505}
506
1da177e4
LT		 507/**
508 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 509 * @id: ATA device number
1da177e4 510 * @drv_stat: value contained in ATA status register
b095518e
JG		 511 * @drv_err: value contained in ATA error register
512 * @sk: the sense key we'll fill out
513 * @asc: the additional sense code we'll fill out
514 * @ascq: the additional sense code qualifier we'll fill out
246619da 515 * @verbose: be verbose
1da177e4 516 *
b095518e
JG		 517 * Converts an ATA error into a SCSI error. Fill out pointers to
518 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
519 * format sense blocks.
1da177e4
LT		 520 *
521 * LOCKING:
cca3974e 522 * spin_lock_irqsave(host lock)
1da177e4 523 */
7102d230
AB		 524static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
525 u8 *asc, u8 *ascq, int verbose)
1da177e4 526{
b095518e 527 int i;
ffe75ef6 528
1da177e4 529 /* Based on the 3ware driver translation table */
98ac62de 530 static const unsigned char sense_table[][4] = {
1da177e4
LT		 531 /* BBD|ECC|ID|MAR */
532 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
533 /* BBD|ECC|ID */
534 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
535 /* ECC|MC|MARK */
536 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
537 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
538 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
539 /* MC|ID|ABRT|TRK0|MARK */
540 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
541 /* MCR|MARK */
542 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
543 /* Bad address mark */
544 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
545 /* TRK0 */
546 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
547 /* Abort & !ICRC */
548 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
549 /* Media change request */
550 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
551 /* SRV */
552 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
553 /* Media change */
554 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
555 /* ECC */
556 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
557 /* BBD - block marked bad */
558 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
559 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
560 };
98ac62de 561 static const unsigned char stat_table[][4] = {
1da177e4
LT		 562 /* Must be first because BUSY means no other bits valid */
563 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
564 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
565 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
566 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
567 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
568 };
1da177e4 569
1da177e4
LT		 570 /*
571 * Is this an error we can process/parse
572 */
b095518e
JG		 573 if (drv_stat & ATA_BUSY) {
574 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 575 }
b095518e
JG		 576
577 if (drv_err) {
578 /* Look for drv_err */
579 for (i = 0; sense_table[i][0] != 0xFF; i++) {
580 /* Look for best matches first */
2e9edbf8 581 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 582 sense_table[i][0]) {
583 *sk = sense_table[i][1];
584 *asc = sense_table[i][2];
585 *ascq = sense_table[i][3];
586 goto translate_done;
587 }
588 }
589 /* No immediate match */
246619da
TH		 590 if (verbose)
591 printk(KERN_WARNING "ata%u: no sense translation for "
592 "error 0x%02x\n", id, drv_err);
1da177e4 593 }
b095518e
JG		 594
595 /* Fall back to interpreting status bits */
596 for (i = 0; stat_table[i][0] != 0xFF; i++) {
597 if (stat_table[i][0] & drv_stat) {
598 *sk = stat_table[i][1];
599 *asc = stat_table[i][2];
600 *ascq = stat_table[i][3];
601 goto translate_done;
1da177e4 602 }
b095518e
JG		 603 }
604 /* No error? Undecoded? */
246619da
TH		 605 if (verbose)
606 printk(KERN_WARNING "ata%u: no sense translation for "
607 "status: 0x%02x\n", id, drv_stat);
b095518e 608
2d202024
AC		 609 /* We need a sensible error return here, which is tricky, and one
610 that won't cause people to do things like return a disk wrongly */
611 *sk = ABORTED_COMMAND;
612 *asc = 0x00;
613 *ascq = 0x00;
b095518e
JG		 614
615 translate_done:
246619da
TH		 616 if (verbose)
617 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
618 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
619 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 620 return;
621}
622
623/*
750426aa 624 * ata_gen_passthru_sense - Generate check condition sense block.
b095518e
JG		 625 * @qc: Command that completed.
626 *
627 * This function is specific to the ATA descriptor format sense
628 * block specified for the ATA pass through commands. Regardless
629 * of whether the command errored or not, return a sense
630 * block. Copy all controller registers into the sense
631 * block. Clear sense key, ASC & ASCQ if there is no error.
632 *
633 * LOCKING:
750426aa 634 * None.
b095518e 635 */
750426aa 636static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
b095518e
JG		 637{
638 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 639 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 640 unsigned char *sb = cmd->sense_buffer;
641 unsigned char *desc = sb + 8;
246619da 642 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 643
644 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
645
0e5dec47 646 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 647
b095518e
JG		 648 /*
649 * Use ata_to_sense_error() to map status register bits
650 * onto sense key, asc & ascq.
651 */
058e55e1
TH		 652 if (qc->err_mask ||
653 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 654 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
246619da 655 &sb[1], &sb[2], &sb[3], verbose);
b095518e 656 sb[1] &= 0x0f;
1da177e4
LT		 657 }
658
b095518e
JG		 659 /*
660 * Sense data is current and format is descriptor.
661 */
662 sb[0] = 0x72;
1da177e4 663
b095518e
JG		 664 desc[0] = 0x09;
665
f38621b3
TH		 666 /* set length of additional sense data */
667 sb[7] = 14;
668 desc[1] = 12;
b095518e
JG		 669
670 /*
671 * Copy registers into sense buffer.
672 */
673 desc[2] = 0x00;
674 desc[3] = tf->feature; /* == error reg */
675 desc[5] = tf->nsect;
676 desc[7] = tf->lbal;
677 desc[9] = tf->lbam;
678 desc[11] = tf->lbah;
679 desc[12] = tf->device;
680 desc[13] = tf->command; /* == status reg */
681
682 /*
683 * Fill in Extend bit, and the high order bytes
684 * if applicable.
685 */
686 if (tf->flags & ATA_TFLAG_LBA48) {
687 desc[2] |= 0x01;
688 desc[4] = tf->hob_nsect;
689 desc[6] = tf->hob_lbal;
690 desc[8] = tf->hob_lbam;
691 desc[10] = tf->hob_lbah;
1da177e4 692 }
b095518e 693}
1da177e4 694
b095518e 695/**
750426aa 696 * ata_gen_ata_sense - generate a SCSI fixed sense block
b095518e
JG		 697 * @qc: Command that we are erroring out
698 *
d25614ba
TH		 699 * Generate sense block for a failed ATA command @qc. Descriptor
700 * format is used to accomodate LBA48 block address.
b095518e
JG		 701 *
702 * LOCKING:
750426aa 703 * None.
b095518e 704 */
750426aa 705static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
b095518e 706{
d25614ba 707 struct ata_device *dev = qc->dev;
b095518e 708 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 709 struct ata_taskfile *tf = &qc->result_tf;
b095518e 710 unsigned char *sb = cmd->sense_buffer;
d25614ba 711 unsigned char *desc = sb + 8;
246619da 712 int verbose = qc->ap->ops->error_handler == NULL;
d25614ba 713 u64 block;
b095518e
JG		 714
715 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
716
0e5dec47 717 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 718
d25614ba
TH		 719 /* sense data is current and format is descriptor */
720 sb[0] = 0x72;
721
722 /* Use ata_to_sense_error() to map status register bits
b095518e
JG		 723 * onto sense key, asc & ascq.
724 */
058e55e1
TH		 725 if (qc->err_mask ||
726 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
44877b4e 727 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
d25614ba
TH		 728 &sb[1], &sb[2], &sb[3], verbose);
729 sb[1] &= 0x0f;
1da177e4 730 }
1da177e4 731
d25614ba 732 block = ata_tf_read_block(&qc->result_tf, dev);
a7dac447 733
d25614ba
TH		 734 /* information sense data descriptor */
735 sb[7] = 12;
736 desc[0] = 0x00;
737 desc[1] = 10;
a7dac447 738
d25614ba
TH		 739 desc[2] |= 0x80; /* valid */
740 desc[6] = block >> 40;
741 desc[7] = block >> 32;
742 desc[8] = block >> 24;
743 desc[9] = block >> 16;
744 desc[10] = block >> 8;
745 desc[11] = block;
1da177e4
LT		 746}
747
a6cce2a7
BK		 748static void ata_scsi_sdev_config(struct scsi_device *sdev)
749{
750 sdev->use_10_for_rw = 1;
751 sdev->use_10_for_ms = 1;
31cc23b3
TH		 752
753 /* Schedule policy is determined by ->qc_defer() callback and
754 * it needs to see every deferred qc. Set dev_blocked to 1 to
755 * prevent SCSI midlayer from automatically deferring
756 * requests.
757 */
758 sdev->max_device_blocked = 1;
a6cce2a7
BK		 759}
760
761static void ata_scsi_dev_config(struct scsi_device *sdev,
762 struct ata_device *dev)
763{
914ed354
TH		 764 /* configure max sectors */
765 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 766
914ed354 767 /* SATA DMA transfers must be multiples of 4 byte, so
a6cce2a7
BK		 768 * we need to pad ATAPI transfers using an extra sg.
769 * Decrement max hw segments accordingly.
770 */
771 if (dev->class == ATA_DEV_ATAPI) {
165125e1 772 struct request_queue *q = sdev->request_queue;
a6cce2a7
BK		 773 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
774 }
a6e6ce8e
TH		 775
776 if (dev->flags & ATA_DFLAG_NCQ) {
777 int depth;
778
779 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
780 depth = min(ATA_MAX_QUEUE - 1, depth);
781 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
782 }
a6cce2a7
BK		 783}
784
1da177e4
LT		 785/**
786 * ata_scsi_slave_config - Set SCSI device attributes
787 * @sdev: SCSI device to examine
788 *
789 * This is called before we actually start reading
790 * and writing to the device, to configure certain
791 * SCSI mid-layer behaviors.
792 *
793 * LOCKING:
794 * Defined by SCSI layer. We don't really care.
795 */
796
797int ata_scsi_slave_config(struct scsi_device *sdev)
798{
31534363
TH		 799 struct ata_port *ap = ata_shost_to_port(sdev->host);
800 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
801
a6cce2a7 802 ata_scsi_sdev_config(sdev);
1da177e4
LT		 803
804 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
805
9666f400
TH		 806 sdev->manage_start_stop = 1;
807
31534363 808 if (dev)
a6cce2a7 809 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 810
811 return 0; /* scsi layer doesn't check return value, sigh */
812}
813
83c47bcb
TH		 814/**
815 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
816 * @sdev: SCSI device to be destroyed
817 *
818 * @sdev is about to be destroyed for hot/warm unplugging. If
819 * this unplugging was initiated by libata as indicated by NULL
820 * dev->sdev, this function doesn't have to do anything.
821 * Otherwise, SCSI layer initiated warm-unplug is in progress.
822 * Clear dev->sdev, schedule the device for ATA detach and invoke
823 * EH.
824 *
825 * LOCKING:
826 * Defined by SCSI layer. We don't really care.
827 */
828void ata_scsi_slave_destroy(struct scsi_device *sdev)
829{
830 struct ata_port *ap = ata_shost_to_port(sdev->host);
831 unsigned long flags;
832 struct ata_device *dev;
833
834 if (!ap->ops->error_handler)
835 return;
836
ba6a1308 837 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 838 dev = __ata_scsi_find_dev(ap, sdev);
839 if (dev && dev->sdev) {
840 /* SCSI device already in CANCEL state, no need to offline it */
841 dev->sdev = NULL;
842 dev->flags |= ATA_DFLAG_DETACH;
843 ata_port_schedule_eh(ap);
844 }
ba6a1308 845 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 846}
847
a6e6ce8e
TH		 848/**
849 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
850 * @sdev: SCSI device to configure queue depth for
851 * @queue_depth: new queue depth
852 *
853 * This is libata standard hostt->change_queue_depth callback.
854 * SCSI will call into this callback when user tries to set queue
855 * depth via sysfs.
856 *
857 * LOCKING:
858 * SCSI layer (we don't care)
859 *
860 * RETURNS:
861 * Newly configured queue depth.
862 */
863int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
864{
865 struct ata_port *ap = ata_shost_to_port(sdev->host);
866 struct ata_device *dev;
360f654e 867 unsigned long flags;
a6e6ce8e 868
c3c70c44 869 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 870 return sdev->queue_depth;
871
872 dev = ata_scsi_find_dev(ap, sdev);
873 if (!dev || !ata_dev_enabled(dev))
874 return sdev->queue_depth;
875
c3c70c44 876 /* NCQ enabled? */
360f654e 877 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 878 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
879 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 880 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 881 queue_depth = 1;
882 }
360f654e
TH		 883 spin_unlock_irqrestore(ap->lock, flags);
884
c3c70c44
TH		 885 /* limit and apply queue depth */
886 queue_depth = min(queue_depth, sdev->host->can_queue);
887 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
888 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
889
890 if (sdev->queue_depth == queue_depth)
891 return -EINVAL;
892
893 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 894 return queue_depth;
895}
896
d9aca22c 897/* XXX: for spindown warning */
da071b42
TH		 898static void ata_delayed_done_timerfn(unsigned long arg)
899{
900 struct scsi_cmnd *scmd = (void *)arg;
901
902 scmd->scsi_done(scmd);
903}
904
d9aca22c 905/* XXX: for spindown warning */
da071b42
TH		 906static void ata_delayed_done(struct scsi_cmnd *scmd)
907{
908 static struct timer_list timer;
909
910 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
911 mod_timer(&timer, jiffies + 5 * HZ);
912}
913
972dcafb
DG		 914/**
915 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
916 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 917 *
918 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
919 * (to start). Perhaps these commands should be preceded by
920 * CHECK POWER MODE to see what power mode the device is already in.
921 * [See SAT revision 5 at www.t10.org]
922 *
923 * LOCKING:
cca3974e 924 * spin_lock_irqsave(host lock)
972dcafb
DG		 925 *
926 * RETURNS:
927 * Zero on success, non-zero on error.
928 */
ad706991 929static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 930{
542b1444 931 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 932 struct ata_taskfile *tf = &qc->tf;
ad706991 933 const u8 *cdb = scmd->cmnd;
972dcafb 934
2e5704f6
TH		 935 if (scmd->cmd_len < 5)
936 goto invalid_fld;
937
972dcafb
DG		 938 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
939 tf->protocol = ATA_PROT_NODATA;
542b1444 940 if (cdb[1] & 0x1) {
972dcafb
DG		 941 ; /* ignore IMMED bit, violates sat-r05 */
942 }
542b1444 943 if (cdb[4] & 0x2)
ae006510 944 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 945 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 946 goto invalid_fld; /* power conditions not supported */
542b1444 947 if (cdb[4] & 0x1) {
972dcafb 948 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 949
950 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 951 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 952
953 tf->lbah = 0x0;
954 tf->lbam = 0x0;
955 tf->lbal = 0x0;
956 tf->device |= ATA_LBA;
957 } else {
958 /* CHS */
959 tf->lbal = 0x1; /* sect */
960 tf->lbam = 0x0; /* cyl low */
961 tf->lbah = 0x0; /* cyl high */
962 }
963
972dcafb 964 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10
TH		 965 } else {
966 /* XXX: This is for backward compatibility, will be
967 * removed. Read Documentation/feature-removal-schedule.txt
968 * for more info.
969 */
d9aca22c 970 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
920a4b10
TH		 971 (system_state == SYSTEM_HALT ||
972 system_state == SYSTEM_POWER_OFF)) {
da071b42 973 static unsigned long warned = 0;
920a4b10 974
da071b42 975 if (!test_and_set_bit(0, &warned)) {
920a4b10
TH		 976 ata_dev_printk(qc->dev, KERN_WARNING,
977 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
978 "UPDATE SHUTDOWN UTILITY\n");
979 ata_dev_printk(qc->dev, KERN_WARNING,
980 "For more info, visit "
981 "http://linux-ata.org/shutdown.html\n");
da071b42
TH		 982
983 /* ->scsi_done is not used, use it for
984 * delayed completion.
985 */
986 scmd->scsi_done = qc->scsidone;
987 qc->scsidone = ata_delayed_done;
920a4b10
TH		 988 }
989 scmd->result = SAM_STAT_GOOD;
990 return 1;
991 }
992
78981a7c
RH		 993 /* Issue ATA STANDBY IMMEDIATE command */
994 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 995 }
78981a7c 996
972dcafb
DG		 997 /*
998 * Standby and Idle condition timers could be implemented but that
999 * would require libata to implement the Power condition mode page
1000 * and allow the user to change it. Changing mode pages requires
1001 * MODE SELECT to be implemented.
1002 */
1003
1004 return 0;
ae006510
DG		 1005
1006invalid_fld:
542b1444 1007 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1008 /* "Invalid field in cbd" */
1009 return 1;
972dcafb
DG		 1010}
1011
1012
1da177e4
LT		 1013/**
1014 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1015 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1016 *
1017 * Sets up an ATA taskfile to issue FLUSH CACHE or
1018 * FLUSH CACHE EXT.
1019 *
1020 * LOCKING:
cca3974e 1021 * spin_lock_irqsave(host lock)
1da177e4
LT		 1022 *
1023 * RETURNS:
1024 * Zero on success, non-zero on error.
1025 */
ad706991 1026static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1027{
1028 struct ata_taskfile *tf = &qc->tf;
1029
1030 tf->flags |= ATA_TFLAG_DEVICE;
1031 tf->protocol = ATA_PROT_NODATA;
1032
6fc49adb 1033 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1034 tf->command = ATA_CMD_FLUSH_EXT;
1035 else
1036 tf->command = ATA_CMD_FLUSH;
1037
1038 return 0;
1039}
1040
3aef5231
AL		 1041/**
1042 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1043 * @cdb: SCSI command to translate
3aef5231
AL		 1044 *
1045 * Calculate LBA and transfer length for 6-byte commands.
1046 *
1047 * RETURNS:
1048 * @plba: the LBA
1049 * @plen: the transfer length
1050 */
542b1444 1051static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1052{
1053 u64 lba = 0;
6c7b7d2b 1054 u32 len;
3aef5231
AL		 1055
1056 VPRINTK("six-byte command\n");
1057
6c7b7d2b 1058 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1059 lba |= ((u64)cdb[2]) << 8;
1060 lba |= ((u64)cdb[3]);
3aef5231 1061
6c7b7d2b 1062 len = cdb[4];
3aef5231
AL		 1063
1064 *plba = lba;
1065 *plen = len;
1066}
1067
1068/**
1069 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1070 * @cdb: SCSI command to translate
3aef5231
AL		 1071 *
1072 * Calculate LBA and transfer length for 10-byte commands.
1073 *
1074 * RETURNS:
1075 * @plba: the LBA
1076 * @plen: the transfer length
1077 */
542b1444 1078static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1079{
1080 u64 lba = 0;
1081 u32 len = 0;
1082
1083 VPRINTK("ten-byte command\n");
1084
542b1444
TH		 1085 lba |= ((u64)cdb[2]) << 24;
1086 lba |= ((u64)cdb[3]) << 16;
1087 lba |= ((u64)cdb[4]) << 8;
1088 lba |= ((u64)cdb[5]);
3aef5231 1089
542b1444
TH		 1090 len |= ((u32)cdb[7]) << 8;
1091 len |= ((u32)cdb[8]);
3aef5231
AL		 1092
1093 *plba = lba;
1094 *plen = len;
1095}
1096
1097/**
1098 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1099 * @cdb: SCSI command to translate
3aef5231
AL		 1100 *
1101 * Calculate LBA and transfer length for 16-byte commands.
1102 *
1103 * RETURNS:
1104 * @plba: the LBA
1105 * @plen: the transfer length
1106 */
542b1444 1107static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1108{
1109 u64 lba = 0;
1110 u32 len = 0;
1111
1112 VPRINTK("sixteen-byte command\n");
1113
542b1444
TH		 1114 lba |= ((u64)cdb[2]) << 56;
1115 lba |= ((u64)cdb[3]) << 48;
1116 lba |= ((u64)cdb[4]) << 40;
1117 lba |= ((u64)cdb[5]) << 32;
1118 lba |= ((u64)cdb[6]) << 24;
1119 lba |= ((u64)cdb[7]) << 16;
1120 lba |= ((u64)cdb[8]) << 8;
1121 lba |= ((u64)cdb[9]);
3aef5231 1122
542b1444
TH		 1123 len |= ((u32)cdb[10]) << 24;
1124 len |= ((u32)cdb[11]) << 16;
1125 len |= ((u32)cdb[12]) << 8;
1126 len |= ((u32)cdb[13]);
3aef5231
AL		 1127
1128 *plba = lba;
1129 *plen = len;
1130}
1131
1da177e4
LT		 1132/**
1133 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1134 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1135 *
1136 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1137 *
1138 * LOCKING:
cca3974e 1139 * spin_lock_irqsave(host lock)
1da177e4
LT		 1140 *
1141 * RETURNS:
1142 * Zero on success, non-zero on error.
1143 */
ad706991 1144static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1145{
542b1444 1146 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1147 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1148 struct ata_device *dev = qc->dev;
1da177e4 1149 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1150 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1151 u64 block;
1152 u32 n_block;
1da177e4
LT		 1153
1154 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1155 tf->protocol = ATA_PROT_NODATA;
1da177e4 1156
2e5704f6
TH		 1157 if (cdb[0] == VERIFY) {
1158 if (scmd->cmd_len < 10)
1159 goto invalid_fld;
542b1444 1160 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1161 } else if (cdb[0] == VERIFY_16) {
1162 if (scmd->cmd_len < 16)
1163 goto invalid_fld;
542b1444 1164 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1165 } else
ae006510 1166 goto invalid_fld;
1da177e4 1167
8bf62ece 1168 if (!n_block)
ae006510 1169 goto nothing_to_do;
8bf62ece 1170 if (block >= dev_sectors)
ae006510 1171 goto out_of_range;
8bf62ece 1172 if ((block + n_block) > dev_sectors)
ae006510 1173 goto out_of_range;
1da177e4 1174
07506697
AL		 1175 if (dev->flags & ATA_DFLAG_LBA) {
1176 tf->flags |= ATA_TFLAG_LBA;
1177
c6a33e24
AL		 1178 if (lba_28_ok(block, n_block)) {
1179 /* use LBA28 */
1180 tf->command = ATA_CMD_VERIFY;
1181 tf->device |= (block >> 24) & 0xf;
1182 } else if (lba_48_ok(block, n_block)) {
1183 if (!(dev->flags & ATA_DFLAG_LBA48))
1184 goto out_of_range;
07506697
AL		 1185
1186 /* use LBA48 */
1187 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1188 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1189
8bf62ece 1190 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1191
8bf62ece
AL		 1192 tf->hob_lbah = (block >> 40) & 0xff;
1193 tf->hob_lbam = (block >> 32) & 0xff;
1194 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1195 } else
1196 /* request too large even for LBA48 */
1197 goto out_of_range;
8bf62ece
AL		 1198
1199 tf->nsect = n_block & 0xff;
1da177e4 1200
8bf62ece
AL		 1201 tf->lbah = (block >> 16) & 0xff;
1202 tf->lbam = (block >> 8) & 0xff;
1203 tf->lbal = block & 0xff;
1da177e4 1204
8bf62ece
AL		 1205 tf->device |= ATA_LBA;
1206 } else {
1207 /* CHS */
1208 u32 sect, head, cyl, track;
1209
c6a33e24
AL		 1210 if (!lba_28_ok(block, n_block))
1211 goto out_of_range;
07506697 1212
8bf62ece
AL		 1213 /* Convert LBA to CHS */
1214 track = (u32)block / dev->sectors;
1215 cyl = track / dev->heads;
1216 head = track % dev->heads;
1217 sect = (u32)block % dev->sectors + 1;
1218
c187c4b5
AL		 1219 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1220 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1221
1222 /* Check whether the converted CHS can fit.
1223 Cylinder: 0-65535
8bf62ece
AL		 1224 Head: 0-15
1225 Sector: 1-255*/
2e9edbf8 1226 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1227 goto out_of_range;
2e9edbf8 1228
8bf62ece
AL		 1229 tf->command = ATA_CMD_VERIFY;
1230 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1231 tf->lbal = sect;
1232 tf->lbam = cyl;
1233 tf->lbah = cyl >> 8;
1234 tf->device |= head;
1235 }
1da177e4
LT		 1236
1237 return 0;
ae006510
DG		 1238
1239invalid_fld:
542b1444 1240 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1241 /* "Invalid field in cbd" */
1242 return 1;
1243
1244out_of_range:
542b1444 1245 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1246 /* "Logical Block Address out of range" */
1247 return 1;
1248
1249nothing_to_do:
542b1444 1250 scmd->result = SAM_STAT_GOOD;
ae006510 1251 return 1;
1da177e4
LT		 1252}
1253
1254/**
1255 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1256 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1257 *
1258 * Converts any of six SCSI read/write commands into the
1259 * ATA counterpart, including starting sector (LBA),
1260 * sector count, and taking into account the device's LBA48
1261 * support.
1262 *
1263 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1264 * %WRITE_16 are currently supported.
1265 *
1266 * LOCKING:
cca3974e 1267 * spin_lock_irqsave(host lock)
1da177e4
LT		 1268 *
1269 * RETURNS:
1270 * Zero on success, non-zero on error.
1271 */
ad706991 1272static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1273{
542b1444 1274 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1275 const u8 *cdb = scmd->cmnd;
bd056d7e 1276 unsigned int tf_flags = 0;
3aef5231
AL		 1277 u64 block;
1278 u32 n_block;
bd056d7e 1279 int rc;
1da177e4 1280
542b1444 1281 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1282 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1283
9a3dccc4 1284 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1285 switch (cdb[0]) {
3aef5231
AL		 1286 case READ_10:
1287 case WRITE_10:
2e5704f6
TH		 1288 if (unlikely(scmd->cmd_len < 10))
1289 goto invalid_fld;
542b1444
TH		 1290 scsi_10_lba_len(cdb, &block, &n_block);
1291 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1292 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1293 break;
1294 case READ_6:
1295 case WRITE_6:
2e5704f6
TH		 1296 if (unlikely(scmd->cmd_len < 6))
1297 goto invalid_fld;
542b1444 1298 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1299
1300 /* for 6-byte r/w commands, transfer length 0
1301 * means 256 blocks of data, not 0 block.
1302 */
76b2bf9b
JG		 1303 if (!n_block)
1304 n_block = 256;
3aef5231
AL		 1305 break;
1306 case READ_16:
1307 case WRITE_16:
2e5704f6
TH		 1308 if (unlikely(scmd->cmd_len < 16))
1309 goto invalid_fld;
542b1444
TH		 1310 scsi_16_lba_len(cdb, &block, &n_block);
1311 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1312 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1313 break;
1314 default:
8bf62ece 1315 DPRINTK("no-byte command\n");
ae006510 1316 goto invalid_fld;
1da177e4
LT		 1317 }
1318
8bf62ece
AL		 1319 /* Check and compose ATA command */
1320 if (!n_block)
c187c4b5
AL		 1321 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1322 * length 0 means transfer 0 block of data.
1323 * However, for ATA R/W commands, sector count 0 means
1324 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1325 *
1326 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1327 */
ae006510 1328 goto nothing_to_do;
1da177e4 1329
bd056d7e 1330 qc->flags |= ATA_QCFLAG_IO;
726f0785 1331 qc->nbytes = n_block * ATA_SECT_SIZE;
1da177e4 1332
bd056d7e
TH		 1333 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1334 qc->tag);
1335 if (likely(rc == 0))
1336 return 0;
ae006510 1337
bd056d7e
TH		 1338 if (rc == -ERANGE)
1339 goto out_of_range;
1340 /* treat all other errors as -EINVAL, fall through */
ae006510 1341invalid_fld:
542b1444 1342 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1343 /* "Invalid field in cbd" */
1344 return 1;
1345
1346out_of_range:
542b1444 1347 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1348 /* "Logical Block Address out of range" */
1349 return 1;
1350
1351nothing_to_do:
542b1444 1352 scmd->result = SAM_STAT_GOOD;
ae006510 1353 return 1;
1da177e4
LT		 1354}
1355
77853bf2 1356static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1357{
c31f571d 1358 struct ata_port *ap = qc->ap;
1da177e4 1359 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1360 u8 *cdb = cmd->cmnd;
a22e2eb0 1361 int need_sense = (qc->err_mask != 0);
b095518e 1362
3057ac3c 1363 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1364 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1365 * cache
1366 */
2c3d2a46
AL		 1367 if (ap->ops->error_handler && !need_sense) {
1368 switch (qc->tf.command) {
1369 case ATA_CMD_SET_FEATURES:
1370 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1371 (qc->tf.feature == SETFEATURES_WC_OFF)) {
9af5c9c9 1372 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
2c3d2a46
AL		 1373 ata_port_schedule_eh(ap);
1374 }
1375 break;
1376
1377 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1378 case ATA_CMD_SET_MULTI: /* multi_count changed */
9af5c9c9 1379 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
2c3d2a46
AL		 1380 ata_port_schedule_eh(ap);
1381 break;
1382 }
3057ac3c 1383 }
1384
b095518e
JG		 1385 /* For ATA pass thru (SAT) commands, generate a sense block if
1386 * user mandated it or if there's an error. Note that if we
1387 * generate because the user forced us to, a check condition
1388 * is generated and the ATA register values are returned
1389 * whether the command completed successfully or not. If there
1390 * was no error, SK, ASC and ASCQ will all be zero.
1391 */
a7dac447
JG		 1392 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1393 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1394 ata_gen_passthru_sense(qc);
b095518e
JG		 1395 } else {
1396 if (!need_sense) {
1397 cmd->result = SAM_STAT_GOOD;
1398 } else {
1399 /* TODO: decide which descriptor format to use
1400 * for 48b LBA devices and call that here
1401 * instead of the fixed desc, which is only
1402 * good for smaller LBA (and maybe CHS?)
1403 * devices.
1404 */
750426aa 1405 ata_gen_ata_sense(qc);
b095518e
JG		 1406 }
1407 }
1da177e4 1408
d9aca22c 1409 /* XXX: track spindown state for spindown skipping and warning */
13b8d09f
TH		 1410 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1411 qc->tf.command == ATA_CMD_STANDBYNOW1))
1412 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1413 else if (likely(system_state != SYSTEM_HALT &&
1414 system_state != SYSTEM_POWER_OFF))
1415 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1416
c31f571d 1417 if (need_sense && !ap->ops->error_handler)
44877b4e 1418 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1419
1420 qc->scsidone(cmd);
1421
77853bf2 1422 ata_qc_free(qc);
1da177e4
LT		 1423}
1424
1425/**
1426 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1427 * @dev: ATA device to which the command is addressed
1428 * @cmd: SCSI command to execute
1429 * @done: SCSI command completion function
1430 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1431 *
1432 * Our ->queuecommand() function has decided that the SCSI
1433 * command issued can be directly translated into an ATA
1434 * command, rather than handled internally.
1435 *
1436 * This function sets up an ata_queued_cmd structure for the
1437 * SCSI command, and sends that ata_queued_cmd to the hardware.
1438 *
ae006510
DG		 1439 * The xlat_func argument (actor) returns 0 if ready to execute
1440 * ATA command, else 1 to finish translation. If 1 is returned
1441 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1442 * to be set reflecting an error condition or clean (early)
1443 * termination.
1444 *
1da177e4 1445 * LOCKING:
cca3974e 1446 * spin_lock_irqsave(host lock)
2115ea94
TH		 1447 *
1448 * RETURNS:
1449 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1450 * needs to be deferred.
1da177e4 1451 */
2115ea94
TH		 1452static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1453 void (*done)(struct scsi_cmnd *),
1454 ata_xlat_func_t xlat_func)
1da177e4 1455{
31cc23b3 1456 struct ata_port *ap = dev->link->ap;
1da177e4 1457 struct ata_queued_cmd *qc;
31cc23b3 1458 int rc;
1da177e4
LT		 1459
1460 VPRINTK("ENTER\n");
1461
3373efd8 1462 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1463 if (!qc)
ae006510 1464 goto err_mem;
1da177e4
LT		 1465
1466 /* data is present; dma-map it */
be7db055 1467 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1468 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1469 if (unlikely(scsi_bufflen(cmd) < 1)) {
f15a1daf
TH		 1470 ata_dev_printk(dev, KERN_WARNING,
1471 "WARNING: zero len r/w req\n");
ae006510 1472 goto err_did;
1da177e4
LT		 1473 }
1474
7120165c 1475 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1476
1477 qc->dma_dir = cmd->sc_data_direction;
1478 }
1479
1480 qc->complete_fn = ata_scsi_qc_complete;
1481
ad706991 1482 if (xlat_func(qc))
ae006510 1483 goto early_finish;
1da177e4 1484
31cc23b3
TH		 1485 if (ap->ops->qc_defer) {
1486 if ((rc = ap->ops->qc_defer(qc)))
1487 goto defer;
1488 }
1489
1da177e4 1490 /* select device, send command to hardware */
8e0e694a 1491 ata_qc_issue(qc);
1da177e4
LT		 1492
1493 VPRINTK("EXIT\n");
2115ea94 1494 return 0;
1da177e4 1495
ae006510
DG		 1496early_finish:
1497 ata_qc_free(qc);
da071b42 1498 qc->scsidone(cmd);
ae006510 1499 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1500 return 0;
ae006510
DG		 1501
1502err_did:
1da177e4 1503 ata_qc_free(qc);
ae006510 1504 cmd->result = (DID_ERROR << 16);
da071b42 1505 qc->scsidone(cmd);
253b92ec 1506err_mem:
ae006510 1507 DPRINTK("EXIT - internal\n");
2115ea94 1508 return 0;
3dc1d881
TH		 1509
1510defer:
31cc23b3 1511 ata_qc_free(qc);
3dc1d881 1512 DPRINTK("EXIT - defer\n");
31cc23b3
TH		 1513 if (rc == ATA_DEFER_LINK)
1514 return SCSI_MLQUEUE_DEVICE_BUSY;
1515 else
1516 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 1517}
1518
1519/**
1520 * ata_scsi_rbuf_get - Map response buffer.
1521 * @cmd: SCSI command containing buffer to be mapped.
1522 * @buf_out: Pointer to mapped area.
1523 *
1524 * Maps buffer contained within SCSI command @cmd.
1525 *
1526 * LOCKING:
cca3974e 1527 * spin_lock_irqsave(host lock)
1da177e4
LT		 1528 *
1529 * RETURNS:
1530 * Length of response buffer.
1531 */
1532
1533static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1534{
1535 u8 *buf;
1536 unsigned int buflen;
1537
7120165c 1538 struct scatterlist *sg = scsi_sglist(cmd);
1da177e4 1539
e10b8c3f 1540 if (sg) {
da02d2a1 1541 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1da177e4
LT		 1542 buflen = sg->length;
1543 } else {
e10b8c3f
BH		 1544 buf = NULL;
1545 buflen = 0;
1da177e4
LT		 1546 }
1547
1548 *buf_out = buf;
1549 return buflen;
1550}
1551
1552/**
1553 * ata_scsi_rbuf_put - Unmap response buffer.
1554 * @cmd: SCSI command containing buffer to be unmapped.
1555 * @buf: buffer to unmap
1556 *
1557 * Unmaps response buffer contained within @cmd.
1558 *
1559 * LOCKING:
cca3974e 1560 * spin_lock_irqsave(host lock)
1da177e4
LT		 1561 */
1562
1563static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1564{
7120165c 1565 struct scatterlist *sg = scsi_sglist(cmd);
e10b8c3f 1566 if (sg)
da02d2a1 1567 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1da177e4
LT		 1568}
1569
1570/**
1571 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1572 * @args: device IDENTIFY data / SCSI command of interest.
1573 * @actor: Callback hook for desired SCSI command simulator
1574 *
1575 * Takes care of the hard work of simulating a SCSI command...
1576 * Mapping the response buffer, calling the command's handler,
1577 * and handling the handler's return value. This return value
1578 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1579 * completed successfully (0), or not (in which case cmd->result
1580 * and sense buffer are assumed to be set).
1da177e4
LT		 1581 *
1582 * LOCKING:
cca3974e 1583 * spin_lock_irqsave(host lock)
1da177e4
LT		 1584 */
1585
1586void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1587 unsigned int (*actor) (struct ata_scsi_args *args,
1588 u8 *rbuf, unsigned int buflen))
1589{
1590 u8 *rbuf;
1591 unsigned int buflen, rc;
1592 struct scsi_cmnd *cmd = args->cmd;
1593
1594 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1595 memset(rbuf, 0, buflen);
1596 rc = actor(args, rbuf, buflen);
1597 ata_scsi_rbuf_put(cmd, rbuf);
1598
ae006510 1599 if (rc == 0)
1da177e4 1600 cmd->result = SAM_STAT_GOOD;
ae006510 1601 args->done(cmd);
1da177e4
LT		 1602}
1603
6a36261e
TH		 1604/**
1605 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1606 * @idx: byte index into SCSI response buffer
1607 * @val: value to set
1608 *
1609 * To be used by SCSI command simulator functions. This macros
1610 * expects two local variables, u8 *rbuf and unsigned int buflen,
1611 * are in scope.
1612 *
1613 * LOCKING:
1614 * None.
1615 */
1616#define ATA_SCSI_RBUF_SET(idx, val) do { \
1617 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1618 } while (0)
1619
1da177e4
LT		 1620/**
1621 * ata_scsiop_inq_std - Simulate INQUIRY command
1622 * @args: device IDENTIFY data / SCSI command of interest.
1623 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1624 * @buflen: Response buffer length.
1625 *
1626 * Returns standard device identification data associated
b142eb65 1627 * with non-VPD INQUIRY command output.
1da177e4
LT		 1628 *
1629 * LOCKING:
cca3974e 1630 * spin_lock_irqsave(host lock)
1da177e4
LT		 1631 */
1632
1633unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1634 unsigned int buflen)
1635{
1636 u8 hdr[] = {
1637 TYPE_DISK,
1638 0,
1639 0x5, /* claim SPC-3 version compatibility */
1640 2,
1641 95 - 4
1642 };
1643
1644 /* set scsi removeable (RMB) bit per ata bit */
1645 if (ata_id_removeable(args->id))
1646 hdr[1] |= (1 << 7);
1647
1648 VPRINTK("ENTER\n");
1649
1650 memcpy(rbuf, hdr, sizeof(hdr));
1651
1652 if (buflen > 35) {
1653 memcpy(&rbuf[8], "ATA ", 8);
a0cf733b
TH		 1654 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1655 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4
LT		 1656 if (rbuf[32] == 0 || rbuf[32] == ' ')
1657 memcpy(&rbuf[32], "n/a ", 4);
1658 }
1659
1660 if (buflen > 63) {
1661 const u8 versions[] = {
1662 0x60, /* SAM-3 (no version claimed) */
1663
1664 0x03,
1665 0x20, /* SBC-2 (no version claimed) */
1666
1667 0x02,
1668 0x60 /* SPC-3 (no version claimed) */
1669 };
1670
1671 memcpy(rbuf + 59, versions, sizeof(versions));
1672 }
1673
1674 return 0;
1675}
1676
1677/**
b142eb65 1678 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1679 * @args: device IDENTIFY data / SCSI command of interest.
1680 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1681 * @buflen: Response buffer length.
1682 *
b142eb65 1683 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1684 *
1685 * LOCKING:
cca3974e 1686 * spin_lock_irqsave(host lock)
1da177e4
LT		 1687 */
1688
1689unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1690 unsigned int buflen)
1691{
1692 const u8 pages[] = {
1693 0x00, /* page 0x00, this page */
1694 0x80, /* page 0x80, unit serial no page */
1695 0x83 /* page 0x83, device ident page */
1696 };
b142eb65 1697 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1698
1699 if (buflen > 6)
1700 memcpy(rbuf + 4, pages, sizeof(pages));
1701
1702 return 0;
1703}
1704
1705/**
b142eb65 1706 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1707 * @args: device IDENTIFY data / SCSI command of interest.
1708 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1709 * @buflen: Response buffer length.
1710 *
1711 * Returns ATA device serial number.
1712 *
1713 * LOCKING:
cca3974e 1714 * spin_lock_irqsave(host lock)
1da177e4
LT		 1715 */
1716
1717unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1718 unsigned int buflen)
1719{
1720 const u8 hdr[] = {
1721 0,
1722 0x80, /* this page code */
1723 0,
a0cf733b 1724 ATA_ID_SERNO_LEN, /* page len */
1da177e4
LT		 1725 };
1726 memcpy(rbuf, hdr, sizeof(hdr));
1727
a0cf733b 1728 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
6a62a04d 1729 ata_id_string(args->id, (unsigned char *) &rbuf[4],
a0cf733b 1730 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 1731
1732 return 0;
1733}
1734
1da177e4 1735/**
b142eb65 1736 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1737 * @args: device IDENTIFY data / SCSI command of interest.
1738 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1739 * @buflen: Response buffer length.
1740 *
b142eb65
JG		 1741 * Yields two logical unit device identification designators:
1742 * - vendor specific ASCII containing the ATA serial number
1743 * - SAT defined "t10 vendor id based" containing ASCII vendor
1744 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1745 *
1746 * LOCKING:
cca3974e 1747 * spin_lock_irqsave(host lock)
1da177e4
LT		 1748 */
1749
1750unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1751 unsigned int buflen)
1752{
b142eb65
JG		 1753 int num;
1754 const int sat_model_serial_desc_len = 68;
1da177e4 1755
b142eb65
JG		 1756 rbuf[1] = 0x83; /* this page code */
1757 num = 4;
1758
a0cf733b 1759 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
b142eb65 1760 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1761 rbuf[num + 0] = 2;
a0cf733b 1762 rbuf[num + 3] = ATA_ID_SERNO_LEN;
b142eb65
JG		 1763 num += 4;
1764 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1765 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1766 num += ATA_ID_SERNO_LEN;
1da177e4 1767 }
b142eb65
JG		 1768 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1769 /* SAT defined lu model and serial numbers descriptor */
1770 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1771 rbuf[num + 0] = 2;
1772 rbuf[num + 1] = 1;
b142eb65
JG		 1773 rbuf[num + 3] = sat_model_serial_desc_len;
1774 num += 4;
1775 memcpy(rbuf + num, "ATA ", 8);
1776 num += 8;
1777 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1778 ATA_ID_PROD, ATA_ID_PROD_LEN);
1779 num += ATA_ID_PROD_LEN;
b142eb65 1780 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1781 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1782 num += ATA_ID_SERNO_LEN;
b142eb65
JG		 1783 }
1784 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1785 return 0;
1786}
1787
ad355b46
JG		 1788/**
1789 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1790 * @args: device IDENTIFY data / SCSI command of interest.
1791 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1792 * @buflen: Response buffer length.
1793 *
1794 * Yields SAT-specified ATA VPD page.
1795 *
1796 * LOCKING:
1797 * spin_lock_irqsave(host lock)
1798 */
1799
1800unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1801 unsigned int buflen)
1802{
1803 u8 pbuf[60];
1804 struct ata_taskfile tf;
1805 unsigned int i;
1806
1807 if (!buflen)
1808 return 0;
1809
1810 memset(&pbuf, 0, sizeof(pbuf));
1811 memset(&tf, 0, sizeof(tf));
1812
1813 pbuf[1] = 0x89; /* our page code */
1814 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1815 pbuf[3] = (0x238 & 0xff);
1816
c78968bb
JG		 1817 memcpy(&pbuf[8], "linux ", 8);
1818 memcpy(&pbuf[16], "libata ", 16);
1819 memcpy(&pbuf[32], DRV_VERSION, 4);
ad355b46
JG		 1820 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1821
1822 /* we don't store the ATA device signature, so we fake it */
1823
1824 tf.command = ATA_DRDY; /* really, this is Status reg */
1825 tf.lbal = 0x1;
1826 tf.nsect = 0x1;
1827
1828 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1829 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1830
1831 pbuf[56] = ATA_CMD_ID_ATA;
1832
1833 i = min(buflen, 60U);
1834 memcpy(rbuf, &pbuf[0], i);
1835 buflen -= i;
1836
1837 if (!buflen)
1838 return 0;
1839
1840 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1841 return 0;
1842}
1843
1da177e4 1844/**
0cba632b 1845 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1846 * @args: device IDENTIFY data / SCSI command of interest.
1847 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1848 * @buflen: Response buffer length.
1849 *
1850 * No operation. Simply returns success to caller, to indicate
1851 * that the caller should successfully complete this SCSI command.
1852 *
1853 * LOCKING:
cca3974e 1854 * spin_lock_irqsave(host lock)
1da177e4
LT		 1855 */
1856
1857unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1858 unsigned int buflen)
1859{
1860 VPRINTK("ENTER\n");
1861 return 0;
1862}
1863
1864/**
1865 * ata_msense_push - Push data onto MODE SENSE data output buffer
1866 * @ptr_io: (input/output) Location to store more output data
1867 * @last: End of output data buffer
1868 * @buf: Pointer to BLOB being added to output buffer
1869 * @buflen: Length of BLOB
1870 *
1871 * Store MODE SENSE data on an output buffer.
1872 *
1873 * LOCKING:
1874 * None.
1875 */
1876
1877static void ata_msense_push(u8 **ptr_io, const u8 *last,
1878 const u8 *buf, unsigned int buflen)
1879{
1880 u8 *ptr = *ptr_io;
1881
1882 if ((ptr + buflen - 1) > last)
1883 return;
1884
1885 memcpy(ptr, buf, buflen);
1886
1887 ptr += buflen;
1888
1889 *ptr_io = ptr;
1890}
1891
1892/**
1893 * ata_msense_caching - Simulate MODE SENSE caching info page
1894 * @id: device IDENTIFY data
1895 * @ptr_io: (input/output) Location to store more output data
1896 * @last: End of output data buffer
1897 *
1898 * Generate a caching info page, which conditionally indicates
1899 * write caching to the SCSI layer, depending on device
1900 * capabilities.
1901 *
1902 * LOCKING:
1903 * None.
1904 */
1905
1906static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1907 const u8 *last)
1908{
00ac37f5 1909 u8 page[CACHE_MPAGE_LEN];
1da177e4 1910
00ac37f5 1911 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1912 if (ata_id_wcache_enabled(id))
1913 page[2] |= (1 << 2); /* write cache enable */
1914 if (!ata_id_rahead_enabled(id))
1915 page[12] |= (1 << 5); /* disable read ahead */
1916
1917 ata_msense_push(ptr_io, last, page, sizeof(page));
1918 return sizeof(page);
1919}
1920
1921/**
1922 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1923 * @dev: Device associated with this MODE SENSE command
1924 * @ptr_io: (input/output) Location to store more output data
1925 * @last: End of output data buffer
1926 *
1927 * Generate a generic MODE SENSE control mode page.
1928 *
1929 * LOCKING:
1930 * None.
1931 */
1932
1933static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1934{
00ac37f5
DG		 1935 ata_msense_push(ptr_io, last, def_control_mpage,
1936 sizeof(def_control_mpage));
1937 return sizeof(def_control_mpage);
1da177e4
LT		 1938}
1939
1940/**
1941 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1942 * @dev: Device associated with this MODE SENSE command
1943 * @ptr_io: (input/output) Location to store more output data
1944 * @last: End of output data buffer
1945 *
1946 * Generate a generic MODE SENSE r/w error recovery page.
1947 *
1948 * LOCKING:
1949 * None.
1950 */
1951
1952static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1953{
1da177e4 1954
00ac37f5
DG		 1955 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1956 sizeof(def_rw_recovery_mpage));
1957 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1958}
1959
48bdc8ec
JA		 1960/*
1961 * We can turn this into a real blacklist if it's needed, for now just
1962 * blacklist any Maxtor BANC1G10 revision firmware
1963 */
1964static int ata_dev_supports_fua(u16 *id)
1965{
a0cf733b 1966 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 1967
c3c013a2
JG		 1968 if (!libata_fua)
1969 return 0;
48bdc8ec
JA		 1970 if (!ata_id_has_fua(id))
1971 return 0;
1972
a0cf733b
TH		 1973 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1974 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 1975
2e02671d 1976 if (strcmp(model, "Maxtor"))
48bdc8ec 1977 return 1;
2e02671d 1978 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 1979 return 1;
1980
1981 return 0; /* blacklisted */
1982}
1983
1da177e4
LT		 1984/**
1985 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1986 * @args: device IDENTIFY data / SCSI command of interest.
1987 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1988 * @buflen: Response buffer length.
1989 *
00ac37f5
DG		 1990 * Simulate MODE SENSE commands. Assume this is invoked for direct
1991 * access devices (e.g. disks) only. There should be no block
1992 * descriptor for other device types.
1da177e4
LT		 1993 *
1994 * LOCKING:
cca3974e 1995 * spin_lock_irqsave(host lock)
1da177e4
LT		 1996 */
1997
1998unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1999 unsigned int buflen)
2000{
9a3dccc4 2001 struct ata_device *dev = args->dev;
1da177e4 2002 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2003 const u8 sat_blk_desc[] = {
2004 0, 0, 0, 0, /* number of blocks: sat unspecified */
2005 0,
2006 0, 0x2, 0x0 /* block length: 512 bytes */
2007 };
2008 u8 pg, spg;
2009 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2010 u8 dpofua;
1da177e4
LT		 2011
2012 VPRINTK("ENTER\n");
2013
2014 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2015 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2016 /*
2017 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2018 */
00ac37f5 2019
1da177e4 2020 page_control = scsicmd[2] >> 6;
ae006510
DG		 2021 switch (page_control) {
2022 case 0: /* current */
2023 break; /* supported */
2024 case 3: /* saved */
2025 goto saving_not_supp;
2026 case 1: /* changeable */
2027 case 2: /* defaults */
2028 default:
2029 goto invalid_fld;
2030 }
1da177e4 2031
00ac37f5
DG		 2032 if (six_byte) {
2033 output_len = 4 + (ebd ? 8 : 0);
2034 alloc_len = scsicmd[4];
2035 } else {
2036 output_len = 8 + (ebd ? 8 : 0);
2037 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2038 }
2039 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2040
2041 p = rbuf + output_len;
00ac37f5 2042 last = rbuf + minlen - 1;
1da177e4 2043
00ac37f5
DG		 2044 pg = scsicmd[2] & 0x3f;
2045 spg = scsicmd[3];
2046 /*
2047 * No mode subpages supported (yet) but asking for _all_
2048 * subpages may be valid
2049 */
2050 if (spg && (spg != ALL_SUB_MPAGES))
2051 goto invalid_fld;
2052
2053 switch(pg) {
2054 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2055 output_len += ata_msense_rw_recovery(&p, last);
2056 break;
2057
00ac37f5 2058 case CACHE_MPAGE:
1da177e4
LT		 2059 output_len += ata_msense_caching(args->id, &p, last);
2060 break;
2061
00ac37f5 2062 case CONTROL_MPAGE: {
1da177e4
LT		 2063 output_len += ata_msense_ctl_mode(&p, last);
2064 break;
2065 }
2066
00ac37f5 2067 case ALL_MPAGES:
1da177e4
LT		 2068 output_len += ata_msense_rw_recovery(&p, last);
2069 output_len += ata_msense_caching(args->id, &p, last);
2070 output_len += ata_msense_ctl_mode(&p, last);
2071 break;
2072
2073 default: /* invalid page code */
ae006510 2074 goto invalid_fld;
1da177e4
LT		 2075 }
2076
00ac37f5
DG		 2077 if (minlen < 1)
2078 return 0;
9a3dccc4
TH		 2079
2080 dpofua = 0;
f79d409f 2081 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2082 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2083 dpofua = 1 << 4;
2084
1da177e4
LT		 2085 if (six_byte) {
2086 output_len--;
2087 rbuf[0] = output_len;
9a3dccc4
TH		 2088 if (minlen > 2)
2089 rbuf[2] |= dpofua;
00ac37f5
DG		 2090 if (ebd) {
2091 if (minlen > 3)
2092 rbuf[3] = sizeof(sat_blk_desc);
2093 if (minlen > 11)
2094 memcpy(rbuf + 4, sat_blk_desc,
2095 sizeof(sat_blk_desc));
2096 }
1da177e4
LT		 2097 } else {
2098 output_len -= 2;
2099 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2100 if (minlen > 1)
2101 rbuf[1] = output_len;
9a3dccc4
TH		 2102 if (minlen > 3)
2103 rbuf[3] |= dpofua;
00ac37f5
DG		 2104 if (ebd) {
2105 if (minlen > 7)
2106 rbuf[7] = sizeof(sat_blk_desc);
2107 if (minlen > 15)
2108 memcpy(rbuf + 8, sat_blk_desc,
2109 sizeof(sat_blk_desc));
2110 }
1da177e4 2111 }
1da177e4 2112 return 0;
ae006510
DG		 2113
2114invalid_fld:
2115 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2116 /* "Invalid field in cbd" */
2117 return 1;
2118
2119saving_not_supp:
2120 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2121 /* "Saving parameters not supported" */
2122 return 1;
1da177e4
LT		 2123}
2124
2125/**
2126 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2127 * @args: device IDENTIFY data / SCSI command of interest.
2128 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2129 * @buflen: Response buffer length.
2130 *
2131 * Simulate READ CAPACITY commands.
2132 *
2133 * LOCKING:
6a36261e 2134 * None.
1da177e4 2135 */
1da177e4
LT		 2136unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2137 unsigned int buflen)
2138{
6a36261e 2139 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2140
2141 VPRINTK("ENTER\n");
2142
1da177e4 2143 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2144 if (last_lba >= 0xffffffffULL)
2145 last_lba = 0xffffffff;
0c144d0d 2146
1da177e4 2147 /* sector count, 32-bit */
6a36261e
TH		 2148 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2149 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2150 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2151 ATA_SCSI_RBUF_SET(3, last_lba);
1da177e4
LT		 2152
2153 /* sector size */
6a36261e
TH		 2154 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2155 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
1da177e4
LT		 2156 } else {
2157 /* sector count, 64-bit */
6a36261e
TH		 2158 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2159 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2160 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2161 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2162 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2163 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2164 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2165 ATA_SCSI_RBUF_SET(7, last_lba);
1da177e4
LT		 2166
2167 /* sector size */
6a36261e
TH		 2168 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2169 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
1da177e4
LT		 2170 }
2171
2172 return 0;
2173}
2174
2175/**
2176 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2177 * @args: device IDENTIFY data / SCSI command of interest.
2178 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2179 * @buflen: Response buffer length.
2180 *
2181 * Simulate REPORT LUNS command.
2182 *
2183 * LOCKING:
cca3974e 2184 * spin_lock_irqsave(host lock)
1da177e4
LT		 2185 */
2186
2187unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2188 unsigned int buflen)
2189{
2190 VPRINTK("ENTER\n");
2191 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2192
2193 return 0;
2194}
2195
845c5834
DG		 2196/**
2197 * ata_scsi_set_sense - Set SCSI sense data and status
2198 * @cmd: SCSI request to be handled
2199 * @sk: SCSI-defined sense key
2200 * @asc: SCSI-defined additional sense code
2201 * @ascq: SCSI-defined additional sense code qualifier
2202 *
2203 * Helper function that builds a valid fixed format, current
2204 * response code and the given sense key (sk), additional sense
2205 * code (asc) and additional sense code qualifier (ascq) with
2206 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2207 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2208 *
2209 * LOCKING:
2210 * Not required
2211 */
2212
2213void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2214{
2215 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2216
2217 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2218 cmd->sense_buffer[2] = sk;
2219 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2220 cmd->sense_buffer[12] = asc;
2221 cmd->sense_buffer[13] = ascq;
2222}
2223
1da177e4
LT		 2224/**
2225 * ata_scsi_badcmd - End a SCSI request with an error
2226 * @cmd: SCSI request to be handled
2227 * @done: SCSI command completion function
2228 * @asc: SCSI-defined additional sense code
2229 * @ascq: SCSI-defined additional sense code qualifier
2230 *
2231 * Helper function that completes a SCSI command with
2232 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2233 * and the specified additional sense codes.
2234 *
2235 * LOCKING:
cca3974e 2236 * spin_lock_irqsave(host lock)
1da177e4
LT		 2237 */
2238
2239void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2240{
2241 DPRINTK("ENTER\n");
ae006510 2242 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2243
2244 done(cmd);
2245}
2246
77853bf2 2247static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2248{
74e6c8c3 2249 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2250 /* FIXME: not quite right; we don't want the
2251 * translation of taskfile registers into
2252 * a sense descriptors, since that's only
2253 * correct for ATA, not ATAPI
2254 */
750426aa 2255 ata_gen_passthru_sense(qc);
74e6c8c3 2256 }
a939c963 2257
c6e6e666 2258 qc->scsidone(qc->scsicmd);
77853bf2 2259 ata_qc_free(qc);
c6e6e666 2260}
a939c963 2261
c6e6e666
JG		 2262/* is it pointless to prefer PIO for "safety reasons"? */
2263static inline int ata_pio_use_silly(struct ata_port *ap)
2264{
2265 return (ap->flags & ATA_FLAG_PIO_DMA);
2266}
2267
2268static void atapi_request_sense(struct ata_queued_cmd *qc)
2269{
2270 struct ata_port *ap = qc->ap;
2271 struct scsi_cmnd *cmd = qc->scsicmd;
2272
2273 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2274
2275 /* FIXME: is this needed? */
2276 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2277
c6e6e666
JG		 2278 ap->ops->tf_read(ap, &qc->tf);
2279
2280 /* fill these in, for the case where they are -not- overwritten */
2281 cmd->sense_buffer[0] = 0x70;
2282 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2283
2284 ata_qc_reinit(qc);
2285
a939c963
JG		 2286 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2287 qc->dma_dir = DMA_FROM_DEVICE;
2288
6e7846e9 2289 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2290 qc->cdb[0] = REQUEST_SENSE;
2291 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2292
2293 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2294 qc->tf.command = ATA_CMD_PACKET;
2295
c6e6e666
JG		 2296 if (ata_pio_use_silly(ap)) {
2297 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2298 qc->tf.feature |= ATAPI_PKT_DMA;
2299 } else {
2300 qc->tf.protocol = ATA_PROT_ATAPI;
2301 qc->tf.lbam = (8 * 1024) & 0xff;
2302 qc->tf.lbah = (8 * 1024) >> 8;
2303 }
a939c963
JG		 2304 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2305
c6e6e666 2306 qc->complete_fn = atapi_sense_complete;
a939c963 2307
8e0e694a 2308 ata_qc_issue(qc);
a939c963
JG		 2309
2310 DPRINTK("EXIT\n");
2311}
2312
77853bf2 2313static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2314{
2315 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2316 unsigned int err_mask = qc->err_mask;
1da177e4 2317
a7dac447 2318 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2319
246619da
TH		 2320 /* handle completion from new EH */
2321 if (unlikely(qc->ap->ops->error_handler &&
2322 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2323
2324 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2325 /* FIXME: not quite right; we don't want the
2326 * translation of taskfile registers into a
2327 * sense descriptors, since that's only
2328 * correct for ATA, not ATAPI
2329 */
750426aa 2330 ata_gen_passthru_sense(qc);
246619da
TH		 2331 }
2332
22aac089
TH		 2333 /* SCSI EH automatically locks door if sdev->locked is
2334 * set. Sometimes door lock request continues to
2335 * fail, for example, when no media is present. This
2336 * creates a loop - SCSI EH issues door lock which
2337 * fails and gets invoked again to acquire sense data
2338 * for the failed command.
2339 *
2340 * If door lock fails, always clear sdev->locked to
2341 * avoid this infinite loop.
2342 */
2343 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2344 qc->dev->sdev->locked = 0;
2345
246619da
TH		 2346 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2347 qc->scsidone(cmd);
2348 ata_qc_free(qc);
2349 return;
2350 }
2351
2352 /* successful completion or old EH failure path */
a7dac447 2353 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2354 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2355 atapi_request_sense(qc);
77853bf2 2356 return;
74e6c8c3 2357 } else if (unlikely(err_mask)) {
a7dac447
JG		 2358 /* FIXME: not quite right; we don't want the
2359 * translation of taskfile registers into
2360 * a sense descriptors, since that's only
2361 * correct for ATA, not ATAPI
2362 */
750426aa 2363 ata_gen_passthru_sense(qc);
74e6c8c3 2364 } else {
1da177e4
LT		 2365 u8 *scsicmd = cmd->cmnd;
2366
fd71da46 2367 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2368 u8 *buf = NULL;
2369 unsigned int buflen;
2370
2371 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2372
2373 /* ATAPI devices typically report zero for their SCSI version,
2374 * and sometimes deviate from the spec WRT response data
2375 * format. If SCSI version is reported as zero like normal,
2376 * then we make the following fixups: 1) Fake MMC-5 version,
2377 * to indicate to the Linux scsi midlayer this is a modern
2378 * device. 2) Ensure response data format / ATAPI information
2379 * are always correct.
a15dbeb4
JG		 2380 */
2381 if (buf[2] == 0) {
2382 buf[2] = 0x5;
2383 buf[3] = 0x32;
2384 }
2385
1da177e4
LT		 2386 ata_scsi_rbuf_put(cmd, buf);
2387 }
a15dbeb4 2388
1da177e4
LT		 2389 cmd->result = SAM_STAT_GOOD;
2390 }
2391
2392 qc->scsidone(cmd);
77853bf2 2393 ata_qc_free(qc);
1da177e4
LT		 2394}
2395/**
2396 * atapi_xlat - Initialize PACKET taskfile
2397 * @qc: command structure to be initialized
1da177e4
LT		 2398 *
2399 * LOCKING:
cca3974e 2400 * spin_lock_irqsave(host lock)
1da177e4
LT		 2401 *
2402 * RETURNS:
2403 * Zero on success, non-zero on failure.
2404 */
ad706991 2405static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2406{
542b1444 2407 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4
LT		 2408 struct ata_device *dev = qc->dev;
2409 int using_pio = (dev->flags & ATA_DFLAG_PIO);
542b1444 2410 int nodata = (scmd->sc_data_direction == DMA_NONE);
1da177e4 2411
2e5704f6
TH		 2412 memset(qc->cdb, 0, dev->cdb_len);
2413 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2414
2415 qc->complete_fn = atapi_qc_complete;
2416
2417 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2418 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2419 qc->tf.flags |= ATA_TFLAG_WRITE;
2420 DPRINTK("direction: write\n");
2421 }
2422
2423 qc->tf.command = ATA_CMD_PACKET;
7120165c 2424 qc->nbytes = scsi_bufflen(scmd);
e00f1ff3
TH		 2425
2426 /* check whether ATAPI DMA is safe */
2427 if (!using_pio && ata_check_atapi_dma(qc))
2428 using_pio = 1;
1da177e4 2429
1da177e4 2430 if (using_pio || nodata) {
e00f1ff3 2431 /* no data, or PIO data xfer */
1da177e4
LT		 2432 if (nodata)
2433 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2434 else
2435 qc->tf.protocol = ATA_PROT_ATAPI;
2436 qc->tf.lbam = (8 * 1024) & 0xff;
2437 qc->tf.lbah = (8 * 1024) >> 8;
e00f1ff3
TH		 2438 } else {
2439 /* DMA data xfer */
1da177e4
LT		 2440 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2441 qc->tf.feature |= ATAPI_PKT_DMA;
2442
542b1444 2443 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2444 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2445 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2446 }
2447
1da177e4
LT		 2448 return 0;
2449}
2450
41bda9c9 2451static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2452{
41bda9c9
TH		 2453 if (ap->nr_pmp_links == 0) {
2454 if (likely(devno < ata_link_max_devices(&ap->link)))
2455 return &ap->link.device[devno];
2456 } else {
2457 if (likely(devno < ap->nr_pmp_links))
2458 return &ap->pmp_link[devno].device[0];
2459 }
2460
ab5b3a5b
TH		 2461 return NULL;
2462}
2463
2464static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2465 const struct scsi_device *scsidev)
2466{
41bda9c9
TH		 2467 int devno;
2468
ab5b3a5b 2469 /* skip commands not addressed to targets we simulate */
41bda9c9
TH		 2470 if (ap->nr_pmp_links == 0) {
2471 if (unlikely(scsidev->channel || scsidev->lun))
2472 return NULL;
2473 devno = scsidev->id;
2474 } else {
2475 if (unlikely(scsidev->id || scsidev->lun))
2476 return NULL;
2477 devno = scsidev->channel;
2478 }
ab5b3a5b 2479
41bda9c9 2480 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2481}
2482
99ba9e09
BK		 2483/**
2484 * ata_scsi_dev_enabled - determine if device is enabled
2485 * @dev: ATA device
2486 *
2487 * Determine if commands should be sent to the specified device.
2488 *
2489 * LOCKING:
cca3974e 2490 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2491 *
2492 * RETURNS:
2493 * 0 if commands are not allowed / 1 if commands are allowed
2494 */
2495
2496static int ata_scsi_dev_enabled(struct ata_device *dev)
2497{
2498 if (unlikely(!ata_dev_enabled(dev)))
2499 return 0;
2500
9af5c9c9 2501 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
99ba9e09
BK		 2502 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2503 ata_dev_printk(dev, KERN_WARNING,
2504 "WARNING: ATAPI is %s, device ignored.\n",
2505 atapi_enabled ? "not supported with this driver" : "disabled");
2506 return 0;
2507 }
2508 }
2509
2510 return 1;
2511}
2512
1da177e4
LT		 2513/**
2514 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2515 * @ap: ATA port to which the device is attached
2516 * @scsidev: SCSI device from which we derive the ATA device
2517 *
2518 * Given various information provided in struct scsi_cmnd,
2519 * map that onto an ATA bus, and using that mapping
2520 * determine which ata_device is associated with the
2521 * SCSI command to be sent.
2522 *
2523 * LOCKING:
cca3974e 2524 * spin_lock_irqsave(host lock)
1da177e4
LT		 2525 *
2526 * RETURNS:
2527 * Associated ATA device, or %NULL if not found.
2528 */
1da177e4 2529static struct ata_device *
057ace5e 2530ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2531{
ab5b3a5b 2532 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2533
99ba9e09 2534 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2535 return NULL;
2536
1da177e4
LT		 2537 return dev;
2538}
2539
b095518e
JG		 2540/*
2541 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2542 * @byte1: Byte 1 from pass-thru CDB.
2543 *
2544 * RETURNS:
2545 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2546 */
2547static u8
2548ata_scsi_map_proto(u8 byte1)
2549{
2550 switch((byte1 & 0x1e) >> 1) {
2551 case 3: /* Non-data */
2552 return ATA_PROT_NODATA;
2553
2554 case 6: /* DMA */
23cb1d71
AL		 2555 case 10: /* UDMA Data-in */
2556 case 11: /* UDMA Data-Out */
b095518e
JG		 2557 return ATA_PROT_DMA;
2558
2559 case 4: /* PIO Data-in */
2560 case 5: /* PIO Data-out */
b095518e
JG		 2561 return ATA_PROT_PIO;
2562
b095518e
JG		 2563 case 0: /* Hard Reset */
2564 case 1: /* SRST */
f93f1078
AL		 2565 case 8: /* Device Diagnostic */
2566 case 9: /* Device Reset */
2567 case 7: /* DMA Queued */
f93f1078
AL		 2568 case 12: /* FPDMA */
2569 case 15: /* Return Response Info */
b095518e
JG		 2570 default: /* Reserved */
2571 break;
2572 }
2573
2574 return ATA_PROT_UNKNOWN;
2575}
2576
2577/**
2578 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2579 * @qc: command structure to be initialized
b095518e
JG		 2580 *
2581 * Handles either 12 or 16-byte versions of the CDB.
2582 *
2583 * RETURNS:
2584 * Zero on success, non-zero on failure.
2585 */
ad706991 2586static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2587{
2588 struct ata_taskfile *tf = &(qc->tf);
542b1444 2589 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2590 struct ata_device *dev = qc->dev;
ad706991 2591 const u8 *cdb = scmd->cmnd;
b095518e 2592
542b1444 2593 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2594 goto invalid_fld;
8190bdb9 2595
f79d409f
AC		 2596 /* We may not issue DMA commands if no DMA mode is set */
2597 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2598 goto invalid_fld;
b095518e
JG		 2599
2600 /*
2601 * 12 and 16 byte CDBs use different offsets to
2602 * provide the various register values.
2603 */
542b1444 2604 if (cdb[0] == ATA_16) {
b095518e
JG		 2605 /*
2606 * 16-byte CDB - may contain extended commands.
2607 *
2608 * If that is the case, copy the upper byte register values.
2609 */
542b1444
TH		 2610 if (cdb[1] & 0x01) {
2611 tf->hob_feature = cdb[3];
2612 tf->hob_nsect = cdb[5];
2613 tf->hob_lbal = cdb[7];
2614 tf->hob_lbam = cdb[9];
2615 tf->hob_lbah = cdb[11];
b095518e
JG		 2616 tf->flags |= ATA_TFLAG_LBA48;
2617 } else
2618 tf->flags &= ~ATA_TFLAG_LBA48;
2619
2620 /*
2621 * Always copy low byte, device and command registers.
2622 */
542b1444
TH		 2623 tf->feature = cdb[4];
2624 tf->nsect = cdb[6];
2625 tf->lbal = cdb[8];
2626 tf->lbam = cdb[10];
2627 tf->lbah = cdb[12];
2628 tf->device = cdb[13];
2629 tf->command = cdb[14];
b095518e
JG		 2630 } else {
2631 /*
2632 * 12-byte CDB - incapable of extended commands.
2633 */
2634 tf->flags &= ~ATA_TFLAG_LBA48;
2635
542b1444
TH		 2636 tf->feature = cdb[3];
2637 tf->nsect = cdb[4];
2638 tf->lbal = cdb[5];
2639 tf->lbam = cdb[6];
2640 tf->lbah = cdb[7];
2641 tf->device = cdb[8];
2642 tf->command = cdb[9];
b095518e 2643 }
fa4453c4
AL		 2644
2645 /* enforce correct master/slave bit */
2646 tf->device = dev->devno ?
2647 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2648
1dce589c
AL		 2649 /* sanity check for pio multi commands */
2650 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2651 goto invalid_fld;
2652
2653 if (is_multi_taskfile(tf)) {
2654 unsigned int multi_count = 1 << (cdb[1] >> 5);
2655
2656 /* compare the passed through multi_count
2657 * with the cached multi_count of libata
2658 */
2659 if (multi_count != dev->multi_count)
2660 ata_dev_printk(dev, KERN_WARNING,
2661 "invalid multi_count %u ignored\n",
2662 multi_count);
d26fc955 2663 }
1dce589c 2664
5a5dbd18
ML		 2665 /* READ/WRITE LONG use a non-standard sect_size */
2666 qc->sect_size = ATA_SECT_SIZE;
2667 switch (tf->command) {
2668 case ATA_CMD_READ_LONG:
2669 case ATA_CMD_READ_LONG_ONCE:
2670 case ATA_CMD_WRITE_LONG:
2671 case ATA_CMD_WRITE_LONG_ONCE:
2672 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2673 goto invalid_fld;
7120165c 2674 qc->sect_size = scsi_bufflen(scmd);
5a5dbd18
ML		 2675 }
2676
b095518e
JG		 2677 /*
2678 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2679 * SET_FEATURES - XFER MODE must be preceded/succeeded
2680 * by an update to hardware-specific registers for each
2681 * controller (i.e. the reason for ->set_piomode(),
2682 * ->set_dmamode(), and ->post_set_mode() hooks).
2683 */
2684 if ((tf->command == ATA_CMD_SET_FEATURES)
2685 && (tf->feature == SETFEATURES_XFER))
9a405257 2686 goto invalid_fld;
b095518e
JG		 2687
2688 /*
2689 * Set flags so that all registers will be written,
2690 * and pass on write indication (used for PIO/DMA
2691 * setup.)
2692 */
2693 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2694
542b1444 2695 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2696 tf->flags |= ATA_TFLAG_WRITE;
2697
2698 /*
2699 * Set transfer length.
2700 *
2701 * TODO: find out if we need to do more here to
2702 * cover scatter/gather case.
2703 */
7120165c 2704 qc->nbytes = scsi_bufflen(scmd);
b095518e 2705
e61e0672
TH		 2706 /* request result TF */
2707 qc->flags |= ATA_QCFLAG_RESULT_TF;
2708
b095518e 2709 return 0;
9a405257
TH		 2710
2711 invalid_fld:
542b1444 2712 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2713 /* "Invalid field in cdb" */
2714 return 1;
b095518e
JG		 2715}
2716
1da177e4
LT		 2717/**
2718 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2719 * @dev: ATA device
2720 * @cmd: SCSI command opcode to consider
2721 *
2722 * Look up the SCSI command given, and determine whether the
2723 * SCSI command is to be translated or simulated.
2724 *
2725 * RETURNS:
2726 * Pointer to translation function if possible, %NULL if not.
2727 */
2728
2729static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2730{
2731 switch (cmd) {
2732 case READ_6:
2733 case READ_10:
2734 case READ_16:
2735
2736 case WRITE_6:
2737 case WRITE_10:
2738 case WRITE_16:
2739 return ata_scsi_rw_xlat;
2740
2741 case SYNCHRONIZE_CACHE:
2742 if (ata_try_flush_cache(dev))
2743 return ata_scsi_flush_xlat;
2744 break;
2745
2746 case VERIFY:
2747 case VERIFY_16:
2748 return ata_scsi_verify_xlat;
b095518e
JG		 2749
2750 case ATA_12:
2751 case ATA_16:
2752 return ata_scsi_pass_thru;
da61396d 2753
972dcafb
DG		 2754 case START_STOP:
2755 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2756 }
2757
2758 return NULL;
2759}
2760
2761/**
2762 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2763 * @ap: ATA port to which the command was being sent
2764 * @cmd: SCSI command to dump
2765 *
2766 * Prints the contents of a SCSI command via printk().
2767 */
2768
2769static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2770 struct scsi_cmnd *cmd)
2771{
2772#ifdef ATA_DEBUG
2773 struct scsi_device *scsidev = cmd->device;
2774 u8 *scsicmd = cmd->cmnd;
2775
2776 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2777 ap->print_id,
1da177e4
LT		 2778 scsidev->channel, scsidev->id, scsidev->lun,
2779 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2780 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2781 scsicmd[8]);
2782#endif
2783}
2784
542b1444 2785static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 2786 void (*done)(struct scsi_cmnd *),
2787 struct ata_device *dev)
eb3f0f9c 2788{
baf4fdfa
ML		 2789 u8 scsi_op = scmd->cmnd[0];
2790 ata_xlat_func_t xlat_func;
2115ea94
TH		 2791 int rc = 0;
2792
eb3f0f9c 2793 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 2794 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2795 goto bad_cdb_len;
eb3f0f9c 2796
baf4fdfa
ML		 2797 xlat_func = ata_get_xlat_func(dev, scsi_op);
2798 } else {
2799 if (unlikely(!scmd->cmd_len))
2800 goto bad_cdb_len;
2801
2802 xlat_func = NULL;
2803 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2804 /* relay SCSI command to ATAPI device */
2805 if (unlikely(scmd->cmd_len > dev->cdb_len))
2806 goto bad_cdb_len;
2807
2808 xlat_func = atapi_xlat;
2809 } else {
2810 /* ATA_16 passthru, treat as an ATA command */
2811 if (unlikely(scmd->cmd_len > 16))
2812 goto bad_cdb_len;
2813
2814 xlat_func = ata_get_xlat_func(dev, scsi_op);
2815 }
2816 }
2817
2818 if (xlat_func)
2819 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2820 else
2821 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 2822
2823 return rc;
baf4fdfa
ML		 2824
2825 bad_cdb_len:
2826 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2827 scmd->cmd_len, scsi_op, dev->cdb_len);
2828 scmd->result = DID_ERROR << 16;
2829 done(scmd);
2830 return 0;
eb3f0f9c
BK		 2831}
2832
1da177e4
LT		 2833/**
2834 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2835 * @cmd: SCSI command to be sent
2836 * @done: Completion function, called when command is complete
2837 *
2838 * In some cases, this function translates SCSI commands into
2839 * ATA taskfiles, and queues the taskfiles to be sent to
2840 * hardware. In other cases, this function simulates a
2841 * SCSI device by evaluating and responding to certain
2842 * SCSI commands. This creates the overall effect of
2843 * ATA and ATAPI devices appearing as SCSI devices.
2844 *
2845 * LOCKING:
cca3974e 2846 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2847 *
2848 * RETURNS:
2115ea94
TH		 2849 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2850 * 0 otherwise.
1da177e4 2851 */
1da177e4
LT		 2852int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2853{
2854 struct ata_port *ap;
2855 struct ata_device *dev;
2856 struct scsi_device *scsidev = cmd->device;
005a5a06 2857 struct Scsi_Host *shost = scsidev->host;
2115ea94 2858 int rc = 0;
1da177e4 2859
35bb94b1 2860 ap = ata_shost_to_port(shost);
005a5a06
JG		 2861
2862 spin_unlock(shost->host_lock);
ba6a1308 2863 spin_lock(ap->lock);
1da177e4
LT		 2864
2865 ata_scsi_dump_cdb(ap, cmd);
2866
2867 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2868 if (likely(dev))
2115ea94 2869 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2870 else {
1da177e4
LT		 2871 cmd->result = (DID_BAD_TARGET << 16);
2872 done(cmd);
1da177e4
LT		 2873 }
2874
ba6a1308 2875 spin_unlock(ap->lock);
005a5a06 2876 spin_lock(shost->host_lock);
2115ea94 2877 return rc;
1da177e4
LT		 2878}
2879
2880/**
2881 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2882 * @dev: the target device
1da177e4
LT		 2883 * @cmd: SCSI command being sent to device.
2884 * @done: SCSI command completion function.
2885 *
2886 * Interprets and directly executes a select list of SCSI commands
2887 * that can be handled internally.
2888 *
2889 * LOCKING:
cca3974e 2890 * spin_lock_irqsave(host lock)
1da177e4
LT		 2891 */
2892
3373efd8 2893void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2894 void (*done)(struct scsi_cmnd *))
2895{
2896 struct ata_scsi_args args;
057ace5e 2897 const u8 *scsicmd = cmd->cmnd;
45394145 2898 u8 tmp8;
1da177e4 2899
9a3dccc4
TH		 2900 args.dev = dev;
2901 args.id = dev->id;
1da177e4
LT		 2902 args.cmd = cmd;
2903 args.done = done;
2904
2905 switch(scsicmd[0]) {
00bd0202
JG		 2906 /* TODO: worth improving? */
2907 case FORMAT_UNIT:
2908 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2909 break;
2910
2911 case INQUIRY:
2912 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2913 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2914 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2915 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
ad355b46
JG		 2916 else switch (scsicmd[2]) {
2917 case 0x00:
1da177e4 2918 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
ad355b46
JG		 2919 break;
2920 case 0x80:
1da177e4 2921 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
ad355b46
JG		 2922 break;
2923 case 0x83:
1da177e4 2924 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
ad355b46
JG		 2925 break;
2926 case 0x89:
2927 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2928 break;
2929 default:
ae006510 2930 ata_scsi_invalid_field(cmd, done);
ad355b46
JG		 2931 break;
2932 }
1da177e4
LT		 2933 break;
2934
2935 case MODE_SENSE:
2936 case MODE_SENSE_10:
2937 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2938 break;
2939
2940 case MODE_SELECT: /* unconditionally return */
2941 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2942 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2943 break;
2944
2945 case READ_CAPACITY:
2946 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2947 break;
2948
2949 case SERVICE_ACTION_IN:
2950 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2951 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2952 else
ae006510 2953 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2954 break;
2955
2956 case REPORT_LUNS:
2957 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2958 break;
2959
1da177e4 2960 case REQUEST_SENSE:
45394145
JG		 2961 ata_scsi_set_sense(cmd, 0, 0, 0);
2962 cmd->result = (DRIVER_SENSE << 24);
2963 done(cmd);
2964 break;
2965
00bd0202
JG		 2966 /* if we reach this, then writeback caching is disabled,
2967 * turning this into a no-op.
2968 */
2969 case SYNCHRONIZE_CACHE:
2970 /* fall through */
2971
2972 /* no-op's, complete with success */
2973 case REZERO_UNIT:
2974 case SEEK_6:
2975 case SEEK_10:
2976 case TEST_UNIT_READY:
2977 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2978 break;
2979
45394145
JG		 2980 case SEND_DIAGNOSTIC:
2981 tmp8 = scsicmd[1] & ~(1 << 3);
2982 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2983 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2984 else
2985 ata_scsi_invalid_field(cmd, done);
2986 break;
1da177e4
LT		 2987
2988 /* all other commands */
2989 default:
ae006510
DG		 2990 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2991 /* "Invalid command operation code" */
2992 done(cmd);
1da177e4
LT		 2993 break;
2994 }
2995}
2996
f3187195
TH		 2997int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
2998{
2999 int i, rc;
3000
3001 for (i = 0; i < host->n_ports; i++) {
3002 struct ata_port *ap = host->ports[i];
3003 struct Scsi_Host *shost;
3004
3005 rc = -ENOMEM;
3006 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3007 if (!shost)
3008 goto err_alloc;
3009
3010 *(struct ata_port **)&shost->hostdata[0] = ap;
3011 ap->scsi_host = shost;
3012
3013 shost->transportt = &ata_scsi_transport_template;
3014 shost->unique_id = ap->print_id;
3015 shost->max_id = 16;
3016 shost->max_lun = 1;
3017 shost->max_channel = 1;
3018 shost->max_cmd_len = 16;
3019
31cc23b3
TH		 3020 /* Schedule policy is determined by ->qc_defer()
3021 * callback and it needs to see every deferred qc.
3022 * Set host_blocked to 1 to prevent SCSI midlayer from
3023 * automatically deferring requests.
3024 */
3025 shost->max_host_blocked = 1;
3026
f3187195
TH		 3027 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3028 if (rc)
3029 goto err_add;
3030 }
3031
3032 return 0;
3033
3034 err_add:
3035 scsi_host_put(host->ports[i]->scsi_host);
3036 err_alloc:
3037 while (--i >= 0) {
3038 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3039
3040 scsi_remove_host(shost);
3041 scsi_host_put(shost);
3042 }
3043 return rc;
3044}
3045
1ae46317 3046void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3047{
1ae46317
TH		 3048 int tries = 5;
3049 struct ata_device *last_failed_dev = NULL;
41bda9c9 3050 struct ata_link *link;
1ae46317 3051 struct ata_device *dev;
644dd0cc 3052
198e0fed 3053 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 3054 return;
3055
1ae46317 3056 repeat:
41bda9c9
TH		 3057 ata_port_for_each_link(link, ap) {
3058 ata_link_for_each_dev(dev, link) {
3059 struct scsi_device *sdev;
3060 int channel = 0, id = 0;
3edebac4 3061
41bda9c9
TH		 3062 if (!ata_dev_enabled(dev) || dev->sdev)
3063 continue;
3f19ee8c 3064
41bda9c9
TH		 3065 if (ata_is_host_link(link))
3066 id = dev->devno;
3067 else
3068 channel = link->pmp;
3069
3070 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3071 NULL);
3072 if (!IS_ERR(sdev)) {
3073 dev->sdev = sdev;
3074 scsi_device_put(sdev);
3075 }
3edebac4 3076 }
3f19ee8c 3077 }
1ae46317
TH		 3078
3079 /* If we scanned while EH was in progress or allocation
3080 * failure occurred, scan would have failed silently. Check
3081 * whether all devices are attached.
3082 */
41bda9c9
TH		 3083 ata_port_for_each_link(link, ap) {
3084 ata_link_for_each_dev(dev, link) {
3085 if (ata_dev_enabled(dev) && !dev->sdev)
3086 goto exit_loop;
3087 }
1ae46317 3088 }
41bda9c9
TH		 3089 exit_loop:
3090 if (!link)
1ae46317
TH		 3091 return;
3092
3093 /* we're missing some SCSI devices */
3094 if (sync) {
3095 /* If caller requested synchrnous scan && we've made
3096 * any progress, sleep briefly and repeat.
3097 */
3098 if (dev != last_failed_dev) {
3099 msleep(100);
3100 last_failed_dev = dev;
3101 goto repeat;
3102 }
3103
3104 /* We might be failing to detect boot device, give it
3105 * a few more chances.
3106 */
3107 if (--tries) {
3108 msleep(100);
3109 goto repeat;
3110 }
3111
3112 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3113 "failed without making any progress,\n"
3114 " switching to async\n");
3115 }
3116
3117 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3118 round_jiffies_relative(HZ));
644dd0cc 3119}
0ea035a3
TH		 3120
3121/**
3122 * ata_scsi_offline_dev - offline attached SCSI device
3123 * @dev: ATA device to offline attached SCSI device for
3124 *
3125 * This function is called from ata_eh_hotplug() and responsible
3126 * for taking the SCSI device attached to @dev offline. This
cca3974e 3127 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3128 * against clearing.
3129 *
3130 * LOCKING:
cca3974e 3131 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3132 *
3133 * RETURNS:
3134 * 1 if attached SCSI device exists, 0 otherwise.
3135 */
3136int ata_scsi_offline_dev(struct ata_device *dev)
3137{
3138 if (dev->sdev) {
3139 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3140 return 1;
3141 }
3142 return 0;
3143}
580b2102
TH		 3144
3145/**
3146 * ata_scsi_remove_dev - remove attached SCSI device
3147 * @dev: ATA device to remove attached SCSI device for
3148 *
3149 * This function is called from ata_eh_scsi_hotplug() and
3150 * responsible for removing the SCSI device attached to @dev.
3151 *
3152 * LOCKING:
3153 * Kernel thread context (may sleep).
3154 */
3155static void ata_scsi_remove_dev(struct ata_device *dev)
3156{
9af5c9c9 3157 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3158 struct scsi_device *sdev;
3159 unsigned long flags;
3160
3161 /* Alas, we need to grab scan_mutex to ensure SCSI device
3162 * state doesn't change underneath us and thus
3163 * scsi_device_get() always succeeds. The mutex locking can
3164 * be removed if there is __scsi_device_get() interface which
3165 * increments reference counts regardless of device state.
3166 */
cca3974e 3167 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3168 spin_lock_irqsave(ap->lock, flags);
580b2102 3169
cca3974e 3170 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3171 sdev = dev->sdev;
3172 dev->sdev = NULL;
3173
3174 if (sdev) {
3175 /* If user initiated unplug races with us, sdev can go
cca3974e 3176 * away underneath us after the host lock and
580b2102
TH		 3177 * scan_mutex are released. Hold onto it.
3178 */
3179 if (scsi_device_get(sdev) == 0) {
3180 /* The following ensures the attached sdev is
3181 * offline on return from ata_scsi_offline_dev()
3182 * regardless it wins or loses the race
3183 * against this function.
3184 */
3185 scsi_device_set_state(sdev, SDEV_OFFLINE);
3186 } else {
3187 WARN_ON(1);
3188 sdev = NULL;
3189 }
3190 }
3191
ba6a1308 3192 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3193 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3194
3195 if (sdev) {
3196 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3197 sdev->sdev_gendev.bus_id);
3198
3199 scsi_remove_device(sdev);
3200 scsi_device_put(sdev);
3201 }
3202}
3203
41bda9c9
TH		 3204static void ata_scsi_handle_link_detach(struct ata_link *link)
3205{
3206 struct ata_port *ap = link->ap;
3207 struct ata_device *dev;
3208
3209 ata_link_for_each_dev(dev, link) {
3210 unsigned long flags;
3211
3212 if (!(dev->flags & ATA_DFLAG_DETACHED))
3213 continue;
3214
3215 spin_lock_irqsave(ap->lock, flags);
3216 dev->flags &= ~ATA_DFLAG_DETACHED;
3217 spin_unlock_irqrestore(ap->lock, flags);
3218
3219 ata_scsi_remove_dev(dev);
3220 }
3221}
3222
2f294968
KCA		 3223/**
3224 * ata_scsi_media_change_notify - send media change event
3225 * @atadev: Pointer to the disk device with media change event
3226 *
3227 * Tell the block layer to send a media change notification
3228 * event.
3229 *
3230 * LOCKING:
854c73a2 3231 * spin_lock_irqsave(host lock)
2f294968 3232 */
854c73a2 3233void ata_scsi_media_change_notify(struct ata_device *dev)
2f294968
KCA		 3234{
3235#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
854c73a2
TH		 3236 if (dev->sdev)
3237 scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
2f294968
KCA		 3238#endif
3239}
3240EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
3241
580b2102
TH		 3242/**
3243 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3244 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3245 *
3246 * Perform SCSI part of hotplug. It's executed from a separate
3247 * workqueue after EH completes. This is necessary because SCSI
3248 * hot plugging requires working EH and hot unplugging is
3249 * synchronized with hot plugging with a mutex.
3250 *
3251 * LOCKING:
3252 * Kernel thread context (may sleep).
3253 */
65f27f38 3254void ata_scsi_hotplug(struct work_struct *work)
580b2102 3255{
65f27f38
DH		 3256 struct ata_port *ap =
3257 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3258 int i;
580b2102 3259
b51e9e5d 3260 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3261 DPRINTK("ENTER/EXIT - unloading\n");
3262 return;
3263 }
3264
3265 DPRINTK("ENTER\n");
3266
41bda9c9
TH		 3267 /* Unplug detached devices. We cannot use link iterator here
3268 * because PMP links have to be scanned even if PMP is
3269 * currently not attached. Iterate manually.
3270 */
3271 ata_scsi_handle_link_detach(&ap->link);
3272 if (ap->pmp_link)
3273 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3274 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3275
3276 /* scan for new ones */
1ae46317 3277 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3278
3279 DPRINTK("EXIT\n");
3280}
83c47bcb
TH		 3281
3282/**
3283 * ata_scsi_user_scan - indication for user-initiated bus scan
3284 * @shost: SCSI host to scan
3285 * @channel: Channel to scan
3286 * @id: ID to scan
3287 * @lun: LUN to scan
3288 *
3289 * This function is called when user explicitly requests bus
3290 * scan. Set probe pending flag and invoke EH.
3291 *
3292 * LOCKING:
3293 * SCSI layer (we don't care)
3294 *
3295 * RETURNS:
3296 * Zero.
3297 */
3298static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3299 unsigned int id, unsigned int lun)
3300{
3301 struct ata_port *ap = ata_shost_to_port(shost);
3302 unsigned long flags;
41bda9c9 3303 int devno, rc = 0;
83c47bcb
TH		 3304
3305 if (!ap->ops->error_handler)
3306 return -EOPNOTSUPP;
3307
41bda9c9 3308 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3309 return -EINVAL;
3310
41bda9c9
TH		 3311 if (ap->nr_pmp_links == 0) {
3312 if (channel != SCAN_WILD_CARD && channel)
3313 return -EINVAL;
3314 devno = id;
3315 } else {
3316 if (id != SCAN_WILD_CARD && id)
3317 return -EINVAL;
3318 devno = channel;
3319 }
3320
ba6a1308 3321 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3322
41bda9c9
TH		 3323 if (devno == SCAN_WILD_CARD) {
3324 struct ata_link *link;
3325
3326 ata_port_for_each_link(link, ap) {
3327 struct ata_eh_info *ehi = &link->eh_info;
3328 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3329 ehi->action |= ATA_EH_SOFTRESET;
3330 }
83c47bcb 3331 } else {
41bda9c9 3332 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3333
3334 if (dev) {
41bda9c9 3335 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9
TH		 3336 ehi->probe_mask |= 1 << dev->devno;
3337 ehi->action |= ATA_EH_SOFTRESET;
3338 ehi->flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3339 } else
3340 rc = -EINVAL;
3341 }
3342
309afcb5 3343 if (rc == 0) {
83c47bcb 3344 ata_port_schedule_eh(ap);
309afcb5
TH		 3345 spin_unlock_irqrestore(ap->lock, flags);
3346 ata_port_wait_eh(ap);
3347 } else
3348 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3349
3350 return rc;
3351}
3057ac3c 3352
3353/**
d0171269 3354 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3355 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3356 *
d0171269
TH		 3357 * After ATA pass thru (SAT) commands are executed successfully,
3358 * libata need to propagate the changes to SCSI layer. This
3359 * function must be executed from ata_aux_wq such that sdev
3360 * attach/detach don't race with rescan.
3057ac3c 3361 *
d0171269
TH		 3362 * LOCKING:
3363 * Kernel thread context (may sleep).
3057ac3c 3364 */
65f27f38 3365void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3366{
65f27f38
DH		 3367 struct ata_port *ap =
3368 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3369 struct ata_link *link;
f58229f8 3370 struct ata_device *dev;
f84e7e41 3371 unsigned long flags;
3057ac3c 3372
f84e7e41
TH		 3373 spin_lock_irqsave(ap->lock, flags);
3374
41bda9c9
TH		 3375 ata_port_for_each_link(link, ap) {
3376 ata_link_for_each_dev(dev, link) {
3377 struct scsi_device *sdev = dev->sdev;
3057ac3c 3378
41bda9c9
TH		 3379 if (!ata_dev_enabled(dev) || !sdev)
3380 continue;
3381 if (scsi_device_get(sdev))
3382 continue;
f84e7e41 3383
41bda9c9
TH		 3384 spin_unlock_irqrestore(ap->lock, flags);
3385 scsi_rescan_device(&(sdev->sdev_gendev));
3386 scsi_device_put(sdev);
3387 spin_lock_irqsave(ap->lock, flags);
3388 }
3057ac3c 3389 }
f84e7e41
TH		 3390
3391 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3392}
80289167
BK		 3393
3394/**
3395 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3396 * @host: ATA host container for all SAS ports
80289167 3397 * @port_info: Information from low-level host driver
cca3974e 3398 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3399 *
3400 * LOCKING:
3401 * PCI/etc. bus probe sem.
3402 *
3403 * RETURNS:
3404 * ata_port pointer on success / NULL on failure.
3405 */
3406
cca3974e 3407struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3408 struct ata_port_info *port_info,
cca3974e 3409 struct Scsi_Host *shost)
80289167 3410{
f3187195 3411 struct ata_port *ap;
80289167 3412
f3187195 3413 ap = ata_port_alloc(host);
80289167
BK		 3414 if (!ap)
3415 return NULL;
3416
f3187195 3417 ap->port_no = 0;
cca3974e 3418 ap->lock = shost->host_lock;
f3187195
TH		 3419 ap->pio_mask = port_info->pio_mask;
3420 ap->mwdma_mask = port_info->mwdma_mask;
3421 ap->udma_mask = port_info->udma_mask;
3422 ap->flags |= port_info->flags;
3423 ap->ops = port_info->port_ops;
3424 ap->cbl = ATA_CBL_SATA;
3425
80289167
BK		 3426 return ap;
3427}
3428EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3429
3430/**
3431 * ata_sas_port_start - Set port up for dma.
3432 * @ap: Port to initialize
3433 *
3434 * Called just after data structures for each port are
3435 * initialized. Allocates DMA pad.
3436 *
3437 * May be used as the port_start() entry in ata_port_operations.
3438 *
3439 * LOCKING:
3440 * Inherited from caller.
3441 */
3442int ata_sas_port_start(struct ata_port *ap)
3443{
3444 return ata_pad_alloc(ap, ap->dev);
3445}
3446EXPORT_SYMBOL_GPL(ata_sas_port_start);
3447
3448/**
3449 * ata_port_stop - Undo ata_sas_port_start()
3450 * @ap: Port to shut down
3451 *
3452 * Frees the DMA pad.
3453 *
3454 * May be used as the port_stop() entry in ata_port_operations.
3455 *
3456 * LOCKING:
3457 * Inherited from caller.
3458 */
3459
3460void ata_sas_port_stop(struct ata_port *ap)
3461{
3462 ata_pad_free(ap, ap->dev);
3463}
3464EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3465
3466/**
3467 * ata_sas_port_init - Initialize a SATA device
3468 * @ap: SATA port to initialize
3469 *
3470 * LOCKING:
3471 * PCI/etc. bus probe sem.
3472 *
3473 * RETURNS:
3474 * Zero on success, non-zero on error.
3475 */
3476
3477int ata_sas_port_init(struct ata_port *ap)
3478{
3479 int rc = ap->ops->port_start(ap);
3480
f3187195
TH		 3481 if (!rc) {
3482 ap->print_id = ata_print_id++;
80289167 3483 rc = ata_bus_probe(ap);
f3187195 3484 }
80289167
BK		 3485
3486 return rc;
3487}
3488EXPORT_SYMBOL_GPL(ata_sas_port_init);
3489
3490/**
3491 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3492 * @ap: SATA port to destroy
3493 *
3494 */
3495
3496void ata_sas_port_destroy(struct ata_port *ap)
3497{
f0d36efd
TH		 3498 if (ap->ops->port_stop)
3499 ap->ops->port_stop(ap);
80289167
BK		 3500 kfree(ap);
3501}
3502EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3503
3504/**
3505 * ata_sas_slave_configure - Default slave_config routine for libata devices
3506 * @sdev: SCSI device to configure
3507 * @ap: ATA port to which SCSI device is attached
3508 *
3509 * RETURNS:
3510 * Zero.
3511 */
3512
3513int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3514{
3515 ata_scsi_sdev_config(sdev);
9af5c9c9 3516 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3517 return 0;
3518}
3519EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3520
3521/**
3522 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3523 * @cmd: SCSI command to be sent
3524 * @done: Completion function, called when command is complete
3525 * @ap: ATA port to which the command is being sent
3526 *
3527 * RETURNS:
08475a19
BK		 3528 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3529 * 0 otherwise.
80289167
BK		 3530 */
3531
3532int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3533 struct ata_port *ap)
3534{
08475a19
BK		 3535 int rc = 0;
3536
80289167
BK		 3537 ata_scsi_dump_cdb(ap, cmd);
3538
9af5c9c9
TH		 3539 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3540 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3541 else {
3542 cmd->result = (DID_BAD_TARGET << 16);
3543 done(cmd);
3544 }
08475a19 3545 return rc;
80289167
BK		 3546}
3547EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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