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[libata] SCSI: clean up R/W recovery mode page
[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;
752}
753
754static void ata_scsi_dev_config(struct scsi_device *sdev,
755 struct ata_device *dev)
756{
914ed354
TH		 757 /* configure max sectors */
758 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 759
914ed354 760 /* SATA DMA transfers must be multiples of 4 byte, so
a6cce2a7
BK		 761 * we need to pad ATAPI transfers using an extra sg.
762 * Decrement max hw segments accordingly.
763 */
764 if (dev->class == ATA_DEV_ATAPI) {
165125e1 765 struct request_queue *q = sdev->request_queue;
a6cce2a7
BK		 766 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
767 }
a6e6ce8e
TH		 768
769 if (dev->flags & ATA_DFLAG_NCQ) {
770 int depth;
771
772 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
773 depth = min(ATA_MAX_QUEUE - 1, depth);
774 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
775 }
a6cce2a7
BK		 776}
777
1da177e4
LT		 778/**
779 * ata_scsi_slave_config - Set SCSI device attributes
780 * @sdev: SCSI device to examine
781 *
782 * This is called before we actually start reading
783 * and writing to the device, to configure certain
784 * SCSI mid-layer behaviors.
785 *
786 * LOCKING:
787 * Defined by SCSI layer. We don't really care.
788 */
789
790int ata_scsi_slave_config(struct scsi_device *sdev)
791{
31534363
TH		 792 struct ata_port *ap = ata_shost_to_port(sdev->host);
793 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
794
a6cce2a7 795 ata_scsi_sdev_config(sdev);
1da177e4
LT		 796
797 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
798
9666f400
TH		 799 sdev->manage_start_stop = 1;
800
31534363 801 if (dev)
a6cce2a7 802 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 803
804 return 0; /* scsi layer doesn't check return value, sigh */
805}
806
83c47bcb
TH		 807/**
808 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
809 * @sdev: SCSI device to be destroyed
810 *
811 * @sdev is about to be destroyed for hot/warm unplugging. If
812 * this unplugging was initiated by libata as indicated by NULL
813 * dev->sdev, this function doesn't have to do anything.
814 * Otherwise, SCSI layer initiated warm-unplug is in progress.
815 * Clear dev->sdev, schedule the device for ATA detach and invoke
816 * EH.
817 *
818 * LOCKING:
819 * Defined by SCSI layer. We don't really care.
820 */
821void ata_scsi_slave_destroy(struct scsi_device *sdev)
822{
823 struct ata_port *ap = ata_shost_to_port(sdev->host);
824 unsigned long flags;
825 struct ata_device *dev;
826
827 if (!ap->ops->error_handler)
828 return;
829
ba6a1308 830 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 831 dev = __ata_scsi_find_dev(ap, sdev);
832 if (dev && dev->sdev) {
833 /* SCSI device already in CANCEL state, no need to offline it */
834 dev->sdev = NULL;
835 dev->flags |= ATA_DFLAG_DETACH;
836 ata_port_schedule_eh(ap);
837 }
ba6a1308 838 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 839}
840
a6e6ce8e
TH		 841/**
842 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
843 * @sdev: SCSI device to configure queue depth for
844 * @queue_depth: new queue depth
845 *
846 * This is libata standard hostt->change_queue_depth callback.
847 * SCSI will call into this callback when user tries to set queue
848 * depth via sysfs.
849 *
850 * LOCKING:
851 * SCSI layer (we don't care)
852 *
853 * RETURNS:
854 * Newly configured queue depth.
855 */
856int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
857{
858 struct ata_port *ap = ata_shost_to_port(sdev->host);
859 struct ata_device *dev;
360f654e 860 unsigned long flags;
a6e6ce8e 861
c3c70c44 862 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
a6e6ce8e
TH		 863 return sdev->queue_depth;
864
865 dev = ata_scsi_find_dev(ap, sdev);
866 if (!dev || !ata_dev_enabled(dev))
867 return sdev->queue_depth;
868
c3c70c44 869 /* NCQ enabled? */
360f654e 870 spin_lock_irqsave(ap->lock, flags);
c3c70c44
TH		 871 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
872 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
360f654e 873 dev->flags |= ATA_DFLAG_NCQ_OFF;
c3c70c44
TH		 874 queue_depth = 1;
875 }
360f654e
TH		 876 spin_unlock_irqrestore(ap->lock, flags);
877
c3c70c44
TH		 878 /* limit and apply queue depth */
879 queue_depth = min(queue_depth, sdev->host->can_queue);
880 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
881 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
882
883 if (sdev->queue_depth == queue_depth)
884 return -EINVAL;
885
886 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
a6e6ce8e
TH		 887 return queue_depth;
888}
889
d9aca22c 890/* XXX: for spindown warning */
da071b42
TH		 891static void ata_delayed_done_timerfn(unsigned long arg)
892{
893 struct scsi_cmnd *scmd = (void *)arg;
894
895 scmd->scsi_done(scmd);
896}
897
d9aca22c 898/* XXX: for spindown warning */
da071b42
TH		 899static void ata_delayed_done(struct scsi_cmnd *scmd)
900{
901 static struct timer_list timer;
902
903 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
904 mod_timer(&timer, jiffies + 5 * HZ);
905}
906
972dcafb
DG		 907/**
908 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
909 * @qc: Storage for translated ATA taskfile
972dcafb
DG		 910 *
911 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
912 * (to start). Perhaps these commands should be preceded by
913 * CHECK POWER MODE to see what power mode the device is already in.
914 * [See SAT revision 5 at www.t10.org]
915 *
916 * LOCKING:
cca3974e 917 * spin_lock_irqsave(host lock)
972dcafb
DG		 918 *
919 * RETURNS:
920 * Zero on success, non-zero on error.
921 */
ad706991 922static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
972dcafb 923{
542b1444 924 struct scsi_cmnd *scmd = qc->scsicmd;
972dcafb 925 struct ata_taskfile *tf = &qc->tf;
ad706991 926 const u8 *cdb = scmd->cmnd;
972dcafb 927
2e5704f6
TH		 928 if (scmd->cmd_len < 5)
929 goto invalid_fld;
930
972dcafb
DG		 931 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
932 tf->protocol = ATA_PROT_NODATA;
542b1444 933 if (cdb[1] & 0x1) {
972dcafb
DG		 934 ; /* ignore IMMED bit, violates sat-r05 */
935 }
542b1444 936 if (cdb[4] & 0x2)
ae006510 937 goto invalid_fld; /* LOEJ bit set not supported */
542b1444 938 if (((cdb[4] >> 4) & 0xf) != 0)
ae006510 939 goto invalid_fld; /* power conditions not supported */
542b1444 940 if (cdb[4] & 0x1) {
972dcafb 941 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 942
943 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 944 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 945
946 tf->lbah = 0x0;
947 tf->lbam = 0x0;
948 tf->lbal = 0x0;
949 tf->device |= ATA_LBA;
950 } else {
951 /* CHS */
952 tf->lbal = 0x1; /* sect */
953 tf->lbam = 0x0; /* cyl low */
954 tf->lbah = 0x0; /* cyl high */
955 }
956
972dcafb 957 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
920a4b10
TH		 958 } else {
959 /* XXX: This is for backward compatibility, will be
960 * removed. Read Documentation/feature-removal-schedule.txt
961 * for more info.
962 */
d9aca22c 963 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
920a4b10
TH		 964 (system_state == SYSTEM_HALT ||
965 system_state == SYSTEM_POWER_OFF)) {
da071b42 966 static unsigned long warned = 0;
920a4b10 967
da071b42 968 if (!test_and_set_bit(0, &warned)) {
920a4b10
TH		 969 ata_dev_printk(qc->dev, KERN_WARNING,
970 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
971 "UPDATE SHUTDOWN UTILITY\n");
972 ata_dev_printk(qc->dev, KERN_WARNING,
973 "For more info, visit "
974 "http://linux-ata.org/shutdown.html\n");
da071b42
TH		 975
976 /* ->scsi_done is not used, use it for
977 * delayed completion.
978 */
979 scmd->scsi_done = qc->scsidone;
980 qc->scsidone = ata_delayed_done;
920a4b10
TH		 981 }
982 scmd->result = SAM_STAT_GOOD;
983 return 1;
984 }
985
78981a7c
RH		 986 /* Issue ATA STANDBY IMMEDIATE command */
987 tf->command = ATA_CMD_STANDBYNOW1;
920a4b10 988 }
78981a7c 989
972dcafb
DG		 990 /*
991 * Standby and Idle condition timers could be implemented but that
992 * would require libata to implement the Power condition mode page
993 * and allow the user to change it. Changing mode pages requires
994 * MODE SELECT to be implemented.
995 */
996
997 return 0;
ae006510
DG		 998
999invalid_fld:
542b1444 1000 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1001 /* "Invalid field in cbd" */
1002 return 1;
972dcafb
DG		 1003}
1004
1005
1da177e4
LT		 1006/**
1007 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1008 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1009 *
1010 * Sets up an ATA taskfile to issue FLUSH CACHE or
1011 * FLUSH CACHE EXT.
1012 *
1013 * LOCKING:
cca3974e 1014 * spin_lock_irqsave(host lock)
1da177e4
LT		 1015 *
1016 * RETURNS:
1017 * Zero on success, non-zero on error.
1018 */
ad706991 1019static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1da177e4
LT		 1020{
1021 struct ata_taskfile *tf = &qc->tf;
1022
1023 tf->flags |= ATA_TFLAG_DEVICE;
1024 tf->protocol = ATA_PROT_NODATA;
1025
6fc49adb 1026 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1027 tf->command = ATA_CMD_FLUSH_EXT;
1028 else
1029 tf->command = ATA_CMD_FLUSH;
1030
1031 return 0;
1032}
1033
3aef5231
AL		 1034/**
1035 * scsi_6_lba_len - Get LBA and transfer length
542b1444 1036 * @cdb: SCSI command to translate
3aef5231
AL		 1037 *
1038 * Calculate LBA and transfer length for 6-byte commands.
1039 *
1040 * RETURNS:
1041 * @plba: the LBA
1042 * @plen: the transfer length
1043 */
542b1444 1044static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1045{
1046 u64 lba = 0;
6c7b7d2b 1047 u32 len;
3aef5231
AL		 1048
1049 VPRINTK("six-byte command\n");
1050
6c7b7d2b 1051 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
542b1444
TH		 1052 lba |= ((u64)cdb[2]) << 8;
1053 lba |= ((u64)cdb[3]);
3aef5231 1054
6c7b7d2b 1055 len = cdb[4];
3aef5231
AL		 1056
1057 *plba = lba;
1058 *plen = len;
1059}
1060
1061/**
1062 * scsi_10_lba_len - Get LBA and transfer length
542b1444 1063 * @cdb: SCSI command to translate
3aef5231
AL		 1064 *
1065 * Calculate LBA and transfer length for 10-byte commands.
1066 *
1067 * RETURNS:
1068 * @plba: the LBA
1069 * @plen: the transfer length
1070 */
542b1444 1071static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1072{
1073 u64 lba = 0;
1074 u32 len = 0;
1075
1076 VPRINTK("ten-byte command\n");
1077
542b1444
TH		 1078 lba |= ((u64)cdb[2]) << 24;
1079 lba |= ((u64)cdb[3]) << 16;
1080 lba |= ((u64)cdb[4]) << 8;
1081 lba |= ((u64)cdb[5]);
3aef5231 1082
542b1444
TH		 1083 len |= ((u32)cdb[7]) << 8;
1084 len |= ((u32)cdb[8]);
3aef5231
AL		 1085
1086 *plba = lba;
1087 *plen = len;
1088}
1089
1090/**
1091 * scsi_16_lba_len - Get LBA and transfer length
542b1444 1092 * @cdb: SCSI command to translate
3aef5231
AL		 1093 *
1094 * Calculate LBA and transfer length for 16-byte commands.
1095 *
1096 * RETURNS:
1097 * @plba: the LBA
1098 * @plen: the transfer length
1099 */
542b1444 1100static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
3aef5231
AL		 1101{
1102 u64 lba = 0;
1103 u32 len = 0;
1104
1105 VPRINTK("sixteen-byte command\n");
1106
542b1444
TH		 1107 lba |= ((u64)cdb[2]) << 56;
1108 lba |= ((u64)cdb[3]) << 48;
1109 lba |= ((u64)cdb[4]) << 40;
1110 lba |= ((u64)cdb[5]) << 32;
1111 lba |= ((u64)cdb[6]) << 24;
1112 lba |= ((u64)cdb[7]) << 16;
1113 lba |= ((u64)cdb[8]) << 8;
1114 lba |= ((u64)cdb[9]);
3aef5231 1115
542b1444
TH		 1116 len |= ((u32)cdb[10]) << 24;
1117 len |= ((u32)cdb[11]) << 16;
1118 len |= ((u32)cdb[12]) << 8;
1119 len |= ((u32)cdb[13]);
3aef5231
AL		 1120
1121 *plba = lba;
1122 *plen = len;
1123}
1124
1da177e4
LT		 1125/**
1126 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1127 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1128 *
1129 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1130 *
1131 * LOCKING:
cca3974e 1132 * spin_lock_irqsave(host lock)
1da177e4
LT		 1133 *
1134 * RETURNS:
1135 * Zero on success, non-zero on error.
1136 */
ad706991 1137static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1da177e4 1138{
542b1444 1139 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4 1140 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1141 struct ata_device *dev = qc->dev;
1da177e4 1142 u64 dev_sectors = qc->dev->n_sectors;
ad706991 1143 const u8 *cdb = scmd->cmnd;
3aef5231
AL		 1144 u64 block;
1145 u32 n_block;
1da177e4
LT		 1146
1147 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1148 tf->protocol = ATA_PROT_NODATA;
1da177e4 1149
2e5704f6
TH		 1150 if (cdb[0] == VERIFY) {
1151 if (scmd->cmd_len < 10)
1152 goto invalid_fld;
542b1444 1153 scsi_10_lba_len(cdb, &block, &n_block);
2e5704f6
TH		 1154 } else if (cdb[0] == VERIFY_16) {
1155 if (scmd->cmd_len < 16)
1156 goto invalid_fld;
542b1444 1157 scsi_16_lba_len(cdb, &block, &n_block);
2e5704f6 1158 } else
ae006510 1159 goto invalid_fld;
1da177e4 1160
8bf62ece 1161 if (!n_block)
ae006510 1162 goto nothing_to_do;
8bf62ece 1163 if (block >= dev_sectors)
ae006510 1164 goto out_of_range;
8bf62ece 1165 if ((block + n_block) > dev_sectors)
ae006510 1166 goto out_of_range;
1da177e4 1167
07506697
AL		 1168 if (dev->flags & ATA_DFLAG_LBA) {
1169 tf->flags |= ATA_TFLAG_LBA;
1170
c6a33e24
AL		 1171 if (lba_28_ok(block, n_block)) {
1172 /* use LBA28 */
1173 tf->command = ATA_CMD_VERIFY;
1174 tf->device |= (block >> 24) & 0xf;
1175 } else if (lba_48_ok(block, n_block)) {
1176 if (!(dev->flags & ATA_DFLAG_LBA48))
1177 goto out_of_range;
07506697
AL		 1178
1179 /* use LBA48 */
1180 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1181 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1182
8bf62ece 1183 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1184
8bf62ece
AL		 1185 tf->hob_lbah = (block >> 40) & 0xff;
1186 tf->hob_lbam = (block >> 32) & 0xff;
1187 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1188 } else
1189 /* request too large even for LBA48 */
1190 goto out_of_range;
8bf62ece
AL		 1191
1192 tf->nsect = n_block & 0xff;
1da177e4 1193
8bf62ece
AL		 1194 tf->lbah = (block >> 16) & 0xff;
1195 tf->lbam = (block >> 8) & 0xff;
1196 tf->lbal = block & 0xff;
1da177e4 1197
8bf62ece
AL		 1198 tf->device |= ATA_LBA;
1199 } else {
1200 /* CHS */
1201 u32 sect, head, cyl, track;
1202
c6a33e24
AL		 1203 if (!lba_28_ok(block, n_block))
1204 goto out_of_range;
07506697 1205
8bf62ece
AL		 1206 /* Convert LBA to CHS */
1207 track = (u32)block / dev->sectors;
1208 cyl = track / dev->heads;
1209 head = track % dev->heads;
1210 sect = (u32)block % dev->sectors + 1;
1211
c187c4b5
AL		 1212 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1213 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1214
1215 /* Check whether the converted CHS can fit.
1216 Cylinder: 0-65535
8bf62ece
AL		 1217 Head: 0-15
1218 Sector: 1-255*/
2e9edbf8 1219 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1220 goto out_of_range;
2e9edbf8 1221
8bf62ece
AL		 1222 tf->command = ATA_CMD_VERIFY;
1223 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1224 tf->lbal = sect;
1225 tf->lbam = cyl;
1226 tf->lbah = cyl >> 8;
1227 tf->device |= head;
1228 }
1da177e4
LT		 1229
1230 return 0;
ae006510
DG		 1231
1232invalid_fld:
542b1444 1233 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1234 /* "Invalid field in cbd" */
1235 return 1;
1236
1237out_of_range:
542b1444 1238 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1239 /* "Logical Block Address out of range" */
1240 return 1;
1241
1242nothing_to_do:
542b1444 1243 scmd->result = SAM_STAT_GOOD;
ae006510 1244 return 1;
1da177e4
LT		 1245}
1246
1247/**
1248 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1249 * @qc: Storage for translated ATA taskfile
1da177e4
LT		 1250 *
1251 * Converts any of six SCSI read/write commands into the
1252 * ATA counterpart, including starting sector (LBA),
1253 * sector count, and taking into account the device's LBA48
1254 * support.
1255 *
1256 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1257 * %WRITE_16 are currently supported.
1258 *
1259 * LOCKING:
cca3974e 1260 * spin_lock_irqsave(host lock)
1da177e4
LT		 1261 *
1262 * RETURNS:
1263 * Zero on success, non-zero on error.
1264 */
ad706991 1265static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1da177e4 1266{
542b1444 1267 struct scsi_cmnd *scmd = qc->scsicmd;
ad706991 1268 const u8 *cdb = scmd->cmnd;
bd056d7e 1269 unsigned int tf_flags = 0;
3aef5231
AL		 1270 u64 block;
1271 u32 n_block;
bd056d7e 1272 int rc;
1da177e4 1273
542b1444 1274 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
bd056d7e 1275 tf_flags |= ATA_TFLAG_WRITE;
1da177e4 1276
9a3dccc4 1277 /* Calculate the SCSI LBA, transfer length and FUA. */
542b1444 1278 switch (cdb[0]) {
3aef5231
AL		 1279 case READ_10:
1280 case WRITE_10:
2e5704f6
TH		 1281 if (unlikely(scmd->cmd_len < 10))
1282 goto invalid_fld;
542b1444
TH		 1283 scsi_10_lba_len(cdb, &block, &n_block);
1284 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1285 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1286 break;
1287 case READ_6:
1288 case WRITE_6:
2e5704f6
TH		 1289 if (unlikely(scmd->cmd_len < 6))
1290 goto invalid_fld;
542b1444 1291 scsi_6_lba_len(cdb, &block, &n_block);
c187c4b5
AL		 1292
1293 /* for 6-byte r/w commands, transfer length 0
1294 * means 256 blocks of data, not 0 block.
1295 */
76b2bf9b
JG		 1296 if (!n_block)
1297 n_block = 256;
3aef5231
AL		 1298 break;
1299 case READ_16:
1300 case WRITE_16:
2e5704f6
TH		 1301 if (unlikely(scmd->cmd_len < 16))
1302 goto invalid_fld;
542b1444
TH		 1303 scsi_16_lba_len(cdb, &block, &n_block);
1304 if (unlikely(cdb[1] & (1 << 3)))
bd056d7e 1305 tf_flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1306 break;
1307 default:
8bf62ece 1308 DPRINTK("no-byte command\n");
ae006510 1309 goto invalid_fld;
1da177e4
LT		 1310 }
1311
8bf62ece
AL		 1312 /* Check and compose ATA command */
1313 if (!n_block)
c187c4b5
AL		 1314 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1315 * length 0 means transfer 0 block of data.
1316 * However, for ATA R/W commands, sector count 0 means
1317 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1318 *
1319 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1320 */
ae006510 1321 goto nothing_to_do;
1da177e4 1322
bd056d7e 1323 qc->flags |= ATA_QCFLAG_IO;
726f0785 1324 qc->nbytes = n_block * ATA_SECT_SIZE;
1da177e4 1325
bd056d7e
TH		 1326 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1327 qc->tag);
1328 if (likely(rc == 0))
1329 return 0;
ae006510 1330
bd056d7e
TH		 1331 if (rc == -ERANGE)
1332 goto out_of_range;
1333 /* treat all other errors as -EINVAL, fall through */
ae006510 1334invalid_fld:
542b1444 1335 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
ae006510
DG		 1336 /* "Invalid field in cbd" */
1337 return 1;
1338
1339out_of_range:
542b1444 1340 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
ae006510
DG		 1341 /* "Logical Block Address out of range" */
1342 return 1;
1343
1344nothing_to_do:
542b1444 1345 scmd->result = SAM_STAT_GOOD;
ae006510 1346 return 1;
1da177e4
LT		 1347}
1348
77853bf2 1349static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1350{
c31f571d 1351 struct ata_port *ap = qc->ap;
1da177e4 1352 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1353 u8 *cdb = cmd->cmnd;
a22e2eb0 1354 int need_sense = (qc->err_mask != 0);
b095518e 1355
3057ac3c 1356 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1357 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1358 * cache
1359 */
2c3d2a46
AL		 1360 if (ap->ops->error_handler && !need_sense) {
1361 switch (qc->tf.command) {
1362 case ATA_CMD_SET_FEATURES:
1363 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1364 (qc->tf.feature == SETFEATURES_WC_OFF)) {
9af5c9c9 1365 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
2c3d2a46
AL		 1366 ata_port_schedule_eh(ap);
1367 }
1368 break;
1369
1370 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1371 case ATA_CMD_SET_MULTI: /* multi_count changed */
9af5c9c9 1372 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
2c3d2a46
AL		 1373 ata_port_schedule_eh(ap);
1374 break;
1375 }
3057ac3c 1376 }
1377
b095518e
JG		 1378 /* For ATA pass thru (SAT) commands, generate a sense block if
1379 * user mandated it or if there's an error. Note that if we
1380 * generate because the user forced us to, a check condition
1381 * is generated and the ATA register values are returned
1382 * whether the command completed successfully or not. If there
1383 * was no error, SK, ASC and ASCQ will all be zero.
1384 */
a7dac447
JG		 1385 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1386 ((cdb[2] & 0x20) || need_sense)) {
750426aa 1387 ata_gen_passthru_sense(qc);
b095518e
JG		 1388 } else {
1389 if (!need_sense) {
1390 cmd->result = SAM_STAT_GOOD;
1391 } else {
1392 /* TODO: decide which descriptor format to use
1393 * for 48b LBA devices and call that here
1394 * instead of the fixed desc, which is only
1395 * good for smaller LBA (and maybe CHS?)
1396 * devices.
1397 */
750426aa 1398 ata_gen_ata_sense(qc);
b095518e
JG		 1399 }
1400 }
1da177e4 1401
d9aca22c 1402 /* XXX: track spindown state for spindown skipping and warning */
13b8d09f
TH		 1403 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1404 qc->tf.command == ATA_CMD_STANDBYNOW1))
1405 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1406 else if (likely(system_state != SYSTEM_HALT &&
1407 system_state != SYSTEM_POWER_OFF))
1408 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1409
c31f571d 1410 if (need_sense && !ap->ops->error_handler)
44877b4e 1411 ata_dump_status(ap->print_id, &qc->result_tf);
1da177e4
LT		 1412
1413 qc->scsidone(cmd);
1414
77853bf2 1415 ata_qc_free(qc);
1da177e4
LT		 1416}
1417
3dc1d881
TH		 1418/**
1419 * ata_scmd_need_defer - Check whether we need to defer scmd
1420 * @dev: ATA device to which the command is addressed
1421 * @is_io: Is the command IO (and thus possibly NCQ)?
1422 *
1423 * NCQ and non-NCQ commands cannot run together. As upper layer
1424 * only knows the queue depth, we are responsible for maintaining
1425 * exclusion. This function checks whether a new command can be
1426 * issued to @dev.
1427 *
1428 * LOCKING:
cca3974e 1429 * spin_lock_irqsave(host lock)
3dc1d881
TH		 1430 *
1431 * RETURNS:
1432 * 1 if deferring is needed, 0 otherwise.
1433 */
1434static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1435{
9af5c9c9 1436 struct ata_link *link = dev->link;
fcf1bf15 1437 int is_ncq = is_io && ata_ncq_enabled(dev);
3dc1d881 1438
fcf1bf15 1439 if (is_ncq) {
9af5c9c9 1440 if (!ata_tag_valid(link->active_tag))
3dc1d881
TH		 1441 return 0;
1442 } else {
9af5c9c9 1443 if (!ata_tag_valid(link->active_tag) && !link->sactive)
3dc1d881
TH		 1444 return 0;
1445 }
1446 return 1;
1447}
1448
1da177e4
LT		 1449/**
1450 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1451 * @dev: ATA device to which the command is addressed
1452 * @cmd: SCSI command to execute
1453 * @done: SCSI command completion function
1454 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1455 *
1456 * Our ->queuecommand() function has decided that the SCSI
1457 * command issued can be directly translated into an ATA
1458 * command, rather than handled internally.
1459 *
1460 * This function sets up an ata_queued_cmd structure for the
1461 * SCSI command, and sends that ata_queued_cmd to the hardware.
1462 *
ae006510
DG		 1463 * The xlat_func argument (actor) returns 0 if ready to execute
1464 * ATA command, else 1 to finish translation. If 1 is returned
1465 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1466 * to be set reflecting an error condition or clean (early)
1467 * termination.
1468 *
1da177e4 1469 * LOCKING:
cca3974e 1470 * spin_lock_irqsave(host lock)
2115ea94
TH		 1471 *
1472 * RETURNS:
1473 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1474 * needs to be deferred.
1da177e4 1475 */
2115ea94
TH		 1476static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1477 void (*done)(struct scsi_cmnd *),
1478 ata_xlat_func_t xlat_func)
1da177e4
LT		 1479{
1480 struct ata_queued_cmd *qc;
3dc1d881 1481 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1482
1483 VPRINTK("ENTER\n");
1484
3dc1d881
TH		 1485 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1486 goto defer;
1487
3373efd8 1488 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1489 if (!qc)
ae006510 1490 goto err_mem;
1da177e4
LT		 1491
1492 /* data is present; dma-map it */
be7db055 1493 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1494 cmd->sc_data_direction == DMA_TO_DEVICE) {
7120165c 1495 if (unlikely(scsi_bufflen(cmd) < 1)) {
f15a1daf
TH		 1496 ata_dev_printk(dev, KERN_WARNING,
1497 "WARNING: zero len r/w req\n");
ae006510 1498 goto err_did;
1da177e4
LT		 1499 }
1500
7120165c 1501 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1da177e4
LT		 1502
1503 qc->dma_dir = cmd->sc_data_direction;
1504 }
1505
1506 qc->complete_fn = ata_scsi_qc_complete;
1507
ad706991 1508 if (xlat_func(qc))
ae006510 1509 goto early_finish;
1da177e4
LT		 1510
1511 /* select device, send command to hardware */
8e0e694a 1512 ata_qc_issue(qc);
1da177e4
LT		 1513
1514 VPRINTK("EXIT\n");
2115ea94 1515 return 0;
1da177e4 1516
ae006510
DG		 1517early_finish:
1518 ata_qc_free(qc);
da071b42 1519 qc->scsidone(cmd);
ae006510 1520 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1521 return 0;
ae006510
DG		 1522
1523err_did:
1da177e4 1524 ata_qc_free(qc);
ae006510 1525 cmd->result = (DID_ERROR << 16);
da071b42 1526 qc->scsidone(cmd);
253b92ec 1527err_mem:
ae006510 1528 DPRINTK("EXIT - internal\n");
2115ea94 1529 return 0;
3dc1d881
TH		 1530
1531defer:
1532 DPRINTK("EXIT - defer\n");
1533 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1534}
1535
1536/**
1537 * ata_scsi_rbuf_get - Map response buffer.
1538 * @cmd: SCSI command containing buffer to be mapped.
1539 * @buf_out: Pointer to mapped area.
1540 *
1541 * Maps buffer contained within SCSI command @cmd.
1542 *
1543 * LOCKING:
cca3974e 1544 * spin_lock_irqsave(host lock)
1da177e4
LT		 1545 *
1546 * RETURNS:
1547 * Length of response buffer.
1548 */
1549
1550static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1551{
1552 u8 *buf;
1553 unsigned int buflen;
1554
7120165c 1555 struct scatterlist *sg = scsi_sglist(cmd);
1da177e4 1556
e10b8c3f 1557 if (sg) {
da02d2a1 1558 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1da177e4
LT		 1559 buflen = sg->length;
1560 } else {
e10b8c3f
BH		 1561 buf = NULL;
1562 buflen = 0;
1da177e4
LT		 1563 }
1564
1565 *buf_out = buf;
1566 return buflen;
1567}
1568
1569/**
1570 * ata_scsi_rbuf_put - Unmap response buffer.
1571 * @cmd: SCSI command containing buffer to be unmapped.
1572 * @buf: buffer to unmap
1573 *
1574 * Unmaps response buffer contained within @cmd.
1575 *
1576 * LOCKING:
cca3974e 1577 * spin_lock_irqsave(host lock)
1da177e4
LT		 1578 */
1579
1580static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1581{
7120165c 1582 struct scatterlist *sg = scsi_sglist(cmd);
e10b8c3f 1583 if (sg)
da02d2a1 1584 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1da177e4
LT		 1585}
1586
1587/**
1588 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1589 * @args: device IDENTIFY data / SCSI command of interest.
1590 * @actor: Callback hook for desired SCSI command simulator
1591 *
1592 * Takes care of the hard work of simulating a SCSI command...
1593 * Mapping the response buffer, calling the command's handler,
1594 * and handling the handler's return value. This return value
1595 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1596 * completed successfully (0), or not (in which case cmd->result
1597 * and sense buffer are assumed to be set).
1da177e4
LT		 1598 *
1599 * LOCKING:
cca3974e 1600 * spin_lock_irqsave(host lock)
1da177e4
LT		 1601 */
1602
1603void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1604 unsigned int (*actor) (struct ata_scsi_args *args,
1605 u8 *rbuf, unsigned int buflen))
1606{
1607 u8 *rbuf;
1608 unsigned int buflen, rc;
1609 struct scsi_cmnd *cmd = args->cmd;
1610
1611 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1612 memset(rbuf, 0, buflen);
1613 rc = actor(args, rbuf, buflen);
1614 ata_scsi_rbuf_put(cmd, rbuf);
1615
ae006510 1616 if (rc == 0)
1da177e4 1617 cmd->result = SAM_STAT_GOOD;
ae006510 1618 args->done(cmd);
1da177e4
LT		 1619}
1620
6a36261e
TH		 1621/**
1622 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1623 * @idx: byte index into SCSI response buffer
1624 * @val: value to set
1625 *
1626 * To be used by SCSI command simulator functions. This macros
1627 * expects two local variables, u8 *rbuf and unsigned int buflen,
1628 * are in scope.
1629 *
1630 * LOCKING:
1631 * None.
1632 */
1633#define ATA_SCSI_RBUF_SET(idx, val) do { \
1634 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1635 } while (0)
1636
1da177e4
LT		 1637/**
1638 * ata_scsiop_inq_std - Simulate INQUIRY command
1639 * @args: device IDENTIFY data / SCSI command of interest.
1640 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1641 * @buflen: Response buffer length.
1642 *
1643 * Returns standard device identification data associated
b142eb65 1644 * with non-VPD INQUIRY command output.
1da177e4
LT		 1645 *
1646 * LOCKING:
cca3974e 1647 * spin_lock_irqsave(host lock)
1da177e4
LT		 1648 */
1649
1650unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1651 unsigned int buflen)
1652{
1653 u8 hdr[] = {
1654 TYPE_DISK,
1655 0,
1656 0x5, /* claim SPC-3 version compatibility */
1657 2,
1658 95 - 4
1659 };
1660
1661 /* set scsi removeable (RMB) bit per ata bit */
1662 if (ata_id_removeable(args->id))
1663 hdr[1] |= (1 << 7);
1664
1665 VPRINTK("ENTER\n");
1666
1667 memcpy(rbuf, hdr, sizeof(hdr));
1668
1669 if (buflen > 35) {
1670 memcpy(&rbuf[8], "ATA ", 8);
a0cf733b
TH		 1671 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1672 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1da177e4
LT		 1673 if (rbuf[32] == 0 || rbuf[32] == ' ')
1674 memcpy(&rbuf[32], "n/a ", 4);
1675 }
1676
1677 if (buflen > 63) {
1678 const u8 versions[] = {
1679 0x60, /* SAM-3 (no version claimed) */
1680
1681 0x03,
1682 0x20, /* SBC-2 (no version claimed) */
1683
1684 0x02,
1685 0x60 /* SPC-3 (no version claimed) */
1686 };
1687
1688 memcpy(rbuf + 59, versions, sizeof(versions));
1689 }
1690
1691 return 0;
1692}
1693
1694/**
b142eb65 1695 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1696 * @args: device IDENTIFY data / SCSI command of interest.
1697 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1698 * @buflen: Response buffer length.
1699 *
b142eb65 1700 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1701 *
1702 * LOCKING:
cca3974e 1703 * spin_lock_irqsave(host lock)
1da177e4
LT		 1704 */
1705
1706unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1707 unsigned int buflen)
1708{
1709 const u8 pages[] = {
1710 0x00, /* page 0x00, this page */
1711 0x80, /* page 0x80, unit serial no page */
1712 0x83 /* page 0x83, device ident page */
1713 };
b142eb65 1714 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1715
1716 if (buflen > 6)
1717 memcpy(rbuf + 4, pages, sizeof(pages));
1718
1719 return 0;
1720}
1721
1722/**
b142eb65 1723 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1724 * @args: device IDENTIFY data / SCSI command of interest.
1725 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1726 * @buflen: Response buffer length.
1727 *
1728 * Returns ATA device serial number.
1729 *
1730 * LOCKING:
cca3974e 1731 * spin_lock_irqsave(host lock)
1da177e4
LT		 1732 */
1733
1734unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1735 unsigned int buflen)
1736{
1737 const u8 hdr[] = {
1738 0,
1739 0x80, /* this page code */
1740 0,
a0cf733b 1741 ATA_ID_SERNO_LEN, /* page len */
1da177e4
LT		 1742 };
1743 memcpy(rbuf, hdr, sizeof(hdr));
1744
a0cf733b 1745 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
6a62a04d 1746 ata_id_string(args->id, (unsigned char *) &rbuf[4],
a0cf733b 1747 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1da177e4
LT		 1748
1749 return 0;
1750}
1751
1da177e4 1752/**
b142eb65 1753 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1754 * @args: device IDENTIFY data / SCSI command of interest.
1755 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1756 * @buflen: Response buffer length.
1757 *
b142eb65
JG		 1758 * Yields two logical unit device identification designators:
1759 * - vendor specific ASCII containing the ATA serial number
1760 * - SAT defined "t10 vendor id based" containing ASCII vendor
1761 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1762 *
1763 * LOCKING:
cca3974e 1764 * spin_lock_irqsave(host lock)
1da177e4
LT		 1765 */
1766
1767unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1768 unsigned int buflen)
1769{
b142eb65
JG		 1770 int num;
1771 const int sat_model_serial_desc_len = 68;
1da177e4 1772
b142eb65
JG		 1773 rbuf[1] = 0x83; /* this page code */
1774 num = 4;
1775
a0cf733b 1776 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
b142eb65 1777 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1778 rbuf[num + 0] = 2;
a0cf733b 1779 rbuf[num + 3] = ATA_ID_SERNO_LEN;
b142eb65
JG		 1780 num += 4;
1781 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1782 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1783 num += ATA_ID_SERNO_LEN;
1da177e4 1784 }
b142eb65
JG		 1785 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1786 /* SAT defined lu model and serial numbers descriptor */
1787 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1788 rbuf[num + 0] = 2;
1789 rbuf[num + 1] = 1;
b142eb65
JG		 1790 rbuf[num + 3] = sat_model_serial_desc_len;
1791 num += 4;
1792 memcpy(rbuf + num, "ATA ", 8);
1793 num += 8;
1794 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1795 ATA_ID_PROD, ATA_ID_PROD_LEN);
1796 num += ATA_ID_PROD_LEN;
b142eb65 1797 ata_id_string(args->id, (unsigned char *) rbuf + num,
a0cf733b
TH		 1798 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1799 num += ATA_ID_SERNO_LEN;
b142eb65
JG		 1800 }
1801 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1802 return 0;
1803}
1804
ad355b46
JG		 1805/**
1806 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1807 * @args: device IDENTIFY data / SCSI command of interest.
1808 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1809 * @buflen: Response buffer length.
1810 *
1811 * Yields SAT-specified ATA VPD page.
1812 *
1813 * LOCKING:
1814 * spin_lock_irqsave(host lock)
1815 */
1816
1817unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1818 unsigned int buflen)
1819{
1820 u8 pbuf[60];
1821 struct ata_taskfile tf;
1822 unsigned int i;
1823
1824 if (!buflen)
1825 return 0;
1826
1827 memset(&pbuf, 0, sizeof(pbuf));
1828 memset(&tf, 0, sizeof(tf));
1829
1830 pbuf[1] = 0x89; /* our page code */
1831 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1832 pbuf[3] = (0x238 & 0xff);
1833
1834 memcpy(&pbuf[8], "ATA ", 8);
1835 ata_id_string(args->id, &pbuf[16], ATA_ID_PROD, 16);
1836 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1837
1838 /* we don't store the ATA device signature, so we fake it */
1839
1840 tf.command = ATA_DRDY; /* really, this is Status reg */
1841 tf.lbal = 0x1;
1842 tf.nsect = 0x1;
1843
1844 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1845 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1846
1847 pbuf[56] = ATA_CMD_ID_ATA;
1848
1849 i = min(buflen, 60U);
1850 memcpy(rbuf, &pbuf[0], i);
1851 buflen -= i;
1852
1853 if (!buflen)
1854 return 0;
1855
1856 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1857 return 0;
1858}
1859
1da177e4 1860/**
0cba632b 1861 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1862 * @args: device IDENTIFY data / SCSI command of interest.
1863 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1864 * @buflen: Response buffer length.
1865 *
1866 * No operation. Simply returns success to caller, to indicate
1867 * that the caller should successfully complete this SCSI command.
1868 *
1869 * LOCKING:
cca3974e 1870 * spin_lock_irqsave(host lock)
1da177e4
LT		 1871 */
1872
1873unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1874 unsigned int buflen)
1875{
1876 VPRINTK("ENTER\n");
1877 return 0;
1878}
1879
1880/**
1881 * ata_msense_push - Push data onto MODE SENSE data output buffer
1882 * @ptr_io: (input/output) Location to store more output data
1883 * @last: End of output data buffer
1884 * @buf: Pointer to BLOB being added to output buffer
1885 * @buflen: Length of BLOB
1886 *
1887 * Store MODE SENSE data on an output buffer.
1888 *
1889 * LOCKING:
1890 * None.
1891 */
1892
1893static void ata_msense_push(u8 **ptr_io, const u8 *last,
1894 const u8 *buf, unsigned int buflen)
1895{
1896 u8 *ptr = *ptr_io;
1897
1898 if ((ptr + buflen - 1) > last)
1899 return;
1900
1901 memcpy(ptr, buf, buflen);
1902
1903 ptr += buflen;
1904
1905 *ptr_io = ptr;
1906}
1907
1908/**
1909 * ata_msense_caching - Simulate MODE SENSE caching info page
1910 * @id: device IDENTIFY data
1911 * @ptr_io: (input/output) Location to store more output data
1912 * @last: End of output data buffer
1913 *
1914 * Generate a caching info page, which conditionally indicates
1915 * write caching to the SCSI layer, depending on device
1916 * capabilities.
1917 *
1918 * LOCKING:
1919 * None.
1920 */
1921
1922static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1923 const u8 *last)
1924{
00ac37f5 1925 u8 page[CACHE_MPAGE_LEN];
1da177e4 1926
00ac37f5 1927 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1928 if (ata_id_wcache_enabled(id))
1929 page[2] |= (1 << 2); /* write cache enable */
1930 if (!ata_id_rahead_enabled(id))
1931 page[12] |= (1 << 5); /* disable read ahead */
1932
1933 ata_msense_push(ptr_io, last, page, sizeof(page));
1934 return sizeof(page);
1935}
1936
1937/**
1938 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1939 * @dev: Device associated with this MODE SENSE command
1940 * @ptr_io: (input/output) Location to store more output data
1941 * @last: End of output data buffer
1942 *
1943 * Generate a generic MODE SENSE control mode page.
1944 *
1945 * LOCKING:
1946 * None.
1947 */
1948
1949static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1950{
00ac37f5
DG		 1951 ata_msense_push(ptr_io, last, def_control_mpage,
1952 sizeof(def_control_mpage));
1953 return sizeof(def_control_mpage);
1da177e4
LT		 1954}
1955
1956/**
1957 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1958 * @dev: Device associated with this MODE SENSE command
1959 * @ptr_io: (input/output) Location to store more output data
1960 * @last: End of output data buffer
1961 *
1962 * Generate a generic MODE SENSE r/w error recovery page.
1963 *
1964 * LOCKING:
1965 * None.
1966 */
1967
1968static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1969{
1da177e4 1970
00ac37f5
DG		 1971 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1972 sizeof(def_rw_recovery_mpage));
1973 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1974}
1975
48bdc8ec
JA		 1976/*
1977 * We can turn this into a real blacklist if it's needed, for now just
1978 * blacklist any Maxtor BANC1G10 revision firmware
1979 */
1980static int ata_dev_supports_fua(u16 *id)
1981{
a0cf733b 1982 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
48bdc8ec 1983
c3c013a2
JG		 1984 if (!libata_fua)
1985 return 0;
48bdc8ec
JA		 1986 if (!ata_id_has_fua(id))
1987 return 0;
1988
a0cf733b
TH		 1989 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1990 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
48bdc8ec 1991
2e02671d 1992 if (strcmp(model, "Maxtor"))
48bdc8ec 1993 return 1;
2e02671d 1994 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 1995 return 1;
1996
1997 return 0; /* blacklisted */
1998}
1999
1da177e4
LT		 2000/**
2001 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2002 * @args: device IDENTIFY data / SCSI command of interest.
2003 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2004 * @buflen: Response buffer length.
2005 *
00ac37f5
DG		 2006 * Simulate MODE SENSE commands. Assume this is invoked for direct
2007 * access devices (e.g. disks) only. There should be no block
2008 * descriptor for other device types.
1da177e4
LT		 2009 *
2010 * LOCKING:
cca3974e 2011 * spin_lock_irqsave(host lock)
1da177e4
LT		 2012 */
2013
2014unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2015 unsigned int buflen)
2016{
9a3dccc4 2017 struct ata_device *dev = args->dev;
1da177e4 2018 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2019 const u8 sat_blk_desc[] = {
2020 0, 0, 0, 0, /* number of blocks: sat unspecified */
2021 0,
2022 0, 0x2, 0x0 /* block length: 512 bytes */
2023 };
2024 u8 pg, spg;
2025 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2026 u8 dpofua;
1da177e4
LT		 2027
2028 VPRINTK("ENTER\n");
2029
2030 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2031 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2032 /*
2033 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2034 */
00ac37f5 2035
1da177e4 2036 page_control = scsicmd[2] >> 6;
ae006510
DG		 2037 switch (page_control) {
2038 case 0: /* current */
2039 break; /* supported */
2040 case 3: /* saved */
2041 goto saving_not_supp;
2042 case 1: /* changeable */
2043 case 2: /* defaults */
2044 default:
2045 goto invalid_fld;
2046 }
1da177e4 2047
00ac37f5
DG		 2048 if (six_byte) {
2049 output_len = 4 + (ebd ? 8 : 0);
2050 alloc_len = scsicmd[4];
2051 } else {
2052 output_len = 8 + (ebd ? 8 : 0);
2053 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2054 }
2055 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2056
2057 p = rbuf + output_len;
00ac37f5 2058 last = rbuf + minlen - 1;
1da177e4 2059
00ac37f5
DG		 2060 pg = scsicmd[2] & 0x3f;
2061 spg = scsicmd[3];
2062 /*
2063 * No mode subpages supported (yet) but asking for _all_
2064 * subpages may be valid
2065 */
2066 if (spg && (spg != ALL_SUB_MPAGES))
2067 goto invalid_fld;
2068
2069 switch(pg) {
2070 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2071 output_len += ata_msense_rw_recovery(&p, last);
2072 break;
2073
00ac37f5 2074 case CACHE_MPAGE:
1da177e4
LT		 2075 output_len += ata_msense_caching(args->id, &p, last);
2076 break;
2077
00ac37f5 2078 case CONTROL_MPAGE: {
1da177e4
LT		 2079 output_len += ata_msense_ctl_mode(&p, last);
2080 break;
2081 }
2082
00ac37f5 2083 case ALL_MPAGES:
1da177e4
LT		 2084 output_len += ata_msense_rw_recovery(&p, last);
2085 output_len += ata_msense_caching(args->id, &p, last);
2086 output_len += ata_msense_ctl_mode(&p, last);
2087 break;
2088
2089 default: /* invalid page code */
ae006510 2090 goto invalid_fld;
1da177e4
LT		 2091 }
2092
00ac37f5
DG		 2093 if (minlen < 1)
2094 return 0;
9a3dccc4
TH		 2095
2096 dpofua = 0;
f79d409f 2097 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2098 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2099 dpofua = 1 << 4;
2100
1da177e4
LT		 2101 if (six_byte) {
2102 output_len--;
2103 rbuf[0] = output_len;
9a3dccc4
TH		 2104 if (minlen > 2)
2105 rbuf[2] |= dpofua;
00ac37f5
DG		 2106 if (ebd) {
2107 if (minlen > 3)
2108 rbuf[3] = sizeof(sat_blk_desc);
2109 if (minlen > 11)
2110 memcpy(rbuf + 4, sat_blk_desc,
2111 sizeof(sat_blk_desc));
2112 }
1da177e4
LT		 2113 } else {
2114 output_len -= 2;
2115 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2116 if (minlen > 1)
2117 rbuf[1] = output_len;
9a3dccc4
TH		 2118 if (minlen > 3)
2119 rbuf[3] |= dpofua;
00ac37f5
DG		 2120 if (ebd) {
2121 if (minlen > 7)
2122 rbuf[7] = sizeof(sat_blk_desc);
2123 if (minlen > 15)
2124 memcpy(rbuf + 8, sat_blk_desc,
2125 sizeof(sat_blk_desc));
2126 }
1da177e4 2127 }
1da177e4 2128 return 0;
ae006510
DG		 2129
2130invalid_fld:
2131 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2132 /* "Invalid field in cbd" */
2133 return 1;
2134
2135saving_not_supp:
2136 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2137 /* "Saving parameters not supported" */
2138 return 1;
1da177e4
LT		 2139}
2140
2141/**
2142 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2143 * @args: device IDENTIFY data / SCSI command of interest.
2144 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2145 * @buflen: Response buffer length.
2146 *
2147 * Simulate READ CAPACITY commands.
2148 *
2149 * LOCKING:
6a36261e 2150 * None.
1da177e4 2151 */
1da177e4
LT		 2152unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2153 unsigned int buflen)
2154{
6a36261e 2155 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
1da177e4
LT		 2156
2157 VPRINTK("ENTER\n");
2158
1da177e4 2159 if (args->cmd->cmnd[0] == READ_CAPACITY) {
6a36261e
TH		 2160 if (last_lba >= 0xffffffffULL)
2161 last_lba = 0xffffffff;
0c144d0d 2162
1da177e4 2163 /* sector count, 32-bit */
6a36261e
TH		 2164 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2165 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2166 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2167 ATA_SCSI_RBUF_SET(3, last_lba);
1da177e4
LT		 2168
2169 /* sector size */
6a36261e
TH		 2170 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2171 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
1da177e4
LT		 2172 } else {
2173 /* sector count, 64-bit */
6a36261e
TH		 2174 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2175 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2176 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2177 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2178 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2179 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2180 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2181 ATA_SCSI_RBUF_SET(7, last_lba);
1da177e4
LT		 2182
2183 /* sector size */
6a36261e
TH		 2184 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2185 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
1da177e4
LT		 2186 }
2187
2188 return 0;
2189}
2190
2191/**
2192 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2193 * @args: device IDENTIFY data / SCSI command of interest.
2194 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2195 * @buflen: Response buffer length.
2196 *
2197 * Simulate REPORT LUNS command.
2198 *
2199 * LOCKING:
cca3974e 2200 * spin_lock_irqsave(host lock)
1da177e4
LT		 2201 */
2202
2203unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2204 unsigned int buflen)
2205{
2206 VPRINTK("ENTER\n");
2207 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2208
2209 return 0;
2210}
2211
845c5834
DG		 2212/**
2213 * ata_scsi_set_sense - Set SCSI sense data and status
2214 * @cmd: SCSI request to be handled
2215 * @sk: SCSI-defined sense key
2216 * @asc: SCSI-defined additional sense code
2217 * @ascq: SCSI-defined additional sense code qualifier
2218 *
2219 * Helper function that builds a valid fixed format, current
2220 * response code and the given sense key (sk), additional sense
2221 * code (asc) and additional sense code qualifier (ascq) with
2222 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2223 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2224 *
2225 * LOCKING:
2226 * Not required
2227 */
2228
2229void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2230{
2231 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2232
2233 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2234 cmd->sense_buffer[2] = sk;
2235 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2236 cmd->sense_buffer[12] = asc;
2237 cmd->sense_buffer[13] = ascq;
2238}
2239
1da177e4
LT		 2240/**
2241 * ata_scsi_badcmd - End a SCSI request with an error
2242 * @cmd: SCSI request to be handled
2243 * @done: SCSI command completion function
2244 * @asc: SCSI-defined additional sense code
2245 * @ascq: SCSI-defined additional sense code qualifier
2246 *
2247 * Helper function that completes a SCSI command with
2248 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2249 * and the specified additional sense codes.
2250 *
2251 * LOCKING:
cca3974e 2252 * spin_lock_irqsave(host lock)
1da177e4
LT		 2253 */
2254
2255void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2256{
2257 DPRINTK("ENTER\n");
ae006510 2258 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2259
2260 done(cmd);
2261}
2262
77853bf2 2263static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2264{
74e6c8c3 2265 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2266 /* FIXME: not quite right; we don't want the
2267 * translation of taskfile registers into
2268 * a sense descriptors, since that's only
2269 * correct for ATA, not ATAPI
2270 */
750426aa 2271 ata_gen_passthru_sense(qc);
74e6c8c3 2272 }
a939c963 2273
c6e6e666 2274 qc->scsidone(qc->scsicmd);
77853bf2 2275 ata_qc_free(qc);
c6e6e666 2276}
a939c963 2277
c6e6e666
JG		 2278/* is it pointless to prefer PIO for "safety reasons"? */
2279static inline int ata_pio_use_silly(struct ata_port *ap)
2280{
2281 return (ap->flags & ATA_FLAG_PIO_DMA);
2282}
2283
2284static void atapi_request_sense(struct ata_queued_cmd *qc)
2285{
2286 struct ata_port *ap = qc->ap;
2287 struct scsi_cmnd *cmd = qc->scsicmd;
2288
2289 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2290
2291 /* FIXME: is this needed? */
2292 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2293
c6e6e666
JG		 2294 ap->ops->tf_read(ap, &qc->tf);
2295
2296 /* fill these in, for the case where they are -not- overwritten */
2297 cmd->sense_buffer[0] = 0x70;
2298 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2299
2300 ata_qc_reinit(qc);
2301
a939c963
JG		 2302 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2303 qc->dma_dir = DMA_FROM_DEVICE;
2304
6e7846e9 2305 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2306 qc->cdb[0] = REQUEST_SENSE;
2307 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2308
2309 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2310 qc->tf.command = ATA_CMD_PACKET;
2311
c6e6e666
JG		 2312 if (ata_pio_use_silly(ap)) {
2313 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2314 qc->tf.feature |= ATAPI_PKT_DMA;
2315 } else {
2316 qc->tf.protocol = ATA_PROT_ATAPI;
2317 qc->tf.lbam = (8 * 1024) & 0xff;
2318 qc->tf.lbah = (8 * 1024) >> 8;
2319 }
a939c963
JG		 2320 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2321
c6e6e666 2322 qc->complete_fn = atapi_sense_complete;
a939c963 2323
8e0e694a 2324 ata_qc_issue(qc);
a939c963
JG		 2325
2326 DPRINTK("EXIT\n");
2327}
2328
77853bf2 2329static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2330{
2331 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2332 unsigned int err_mask = qc->err_mask;
1da177e4 2333
a7dac447 2334 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2335
246619da
TH		 2336 /* handle completion from new EH */
2337 if (unlikely(qc->ap->ops->error_handler &&
2338 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2339
2340 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2341 /* FIXME: not quite right; we don't want the
2342 * translation of taskfile registers into a
2343 * sense descriptors, since that's only
2344 * correct for ATA, not ATAPI
2345 */
750426aa 2346 ata_gen_passthru_sense(qc);
246619da
TH		 2347 }
2348
22aac089
TH		 2349 /* SCSI EH automatically locks door if sdev->locked is
2350 * set. Sometimes door lock request continues to
2351 * fail, for example, when no media is present. This
2352 * creates a loop - SCSI EH issues door lock which
2353 * fails and gets invoked again to acquire sense data
2354 * for the failed command.
2355 *
2356 * If door lock fails, always clear sdev->locked to
2357 * avoid this infinite loop.
2358 */
2359 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2360 qc->dev->sdev->locked = 0;
2361
246619da
TH		 2362 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2363 qc->scsidone(cmd);
2364 ata_qc_free(qc);
2365 return;
2366 }
2367
2368 /* successful completion or old EH failure path */
a7dac447 2369 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2370 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2371 atapi_request_sense(qc);
77853bf2 2372 return;
74e6c8c3 2373 } else if (unlikely(err_mask)) {
a7dac447
JG		 2374 /* FIXME: not quite right; we don't want the
2375 * translation of taskfile registers into
2376 * a sense descriptors, since that's only
2377 * correct for ATA, not ATAPI
2378 */
750426aa 2379 ata_gen_passthru_sense(qc);
74e6c8c3 2380 } else {
1da177e4
LT		 2381 u8 *scsicmd = cmd->cmnd;
2382
fd71da46 2383 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2384 u8 *buf = NULL;
2385 unsigned int buflen;
2386
2387 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2388
2389 /* ATAPI devices typically report zero for their SCSI version,
2390 * and sometimes deviate from the spec WRT response data
2391 * format. If SCSI version is reported as zero like normal,
2392 * then we make the following fixups: 1) Fake MMC-5 version,
2393 * to indicate to the Linux scsi midlayer this is a modern
2394 * device. 2) Ensure response data format / ATAPI information
2395 * are always correct.
a15dbeb4
JG		 2396 */
2397 if (buf[2] == 0) {
2398 buf[2] = 0x5;
2399 buf[3] = 0x32;
2400 }
2401
1da177e4
LT		 2402 ata_scsi_rbuf_put(cmd, buf);
2403 }
a15dbeb4 2404
1da177e4
LT		 2405 cmd->result = SAM_STAT_GOOD;
2406 }
2407
2408 qc->scsidone(cmd);
77853bf2 2409 ata_qc_free(qc);
1da177e4
LT		 2410}
2411/**
2412 * atapi_xlat - Initialize PACKET taskfile
2413 * @qc: command structure to be initialized
1da177e4
LT		 2414 *
2415 * LOCKING:
cca3974e 2416 * spin_lock_irqsave(host lock)
1da177e4
LT		 2417 *
2418 * RETURNS:
2419 * Zero on success, non-zero on failure.
2420 */
ad706991 2421static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
1da177e4 2422{
542b1444 2423 struct scsi_cmnd *scmd = qc->scsicmd;
1da177e4
LT		 2424 struct ata_device *dev = qc->dev;
2425 int using_pio = (dev->flags & ATA_DFLAG_PIO);
542b1444 2426 int nodata = (scmd->sc_data_direction == DMA_NONE);
1da177e4 2427
2e5704f6
TH		 2428 memset(qc->cdb, 0, dev->cdb_len);
2429 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
1da177e4
LT		 2430
2431 qc->complete_fn = atapi_qc_complete;
2432
2433 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
542b1444 2434 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2435 qc->tf.flags |= ATA_TFLAG_WRITE;
2436 DPRINTK("direction: write\n");
2437 }
2438
2439 qc->tf.command = ATA_CMD_PACKET;
7120165c 2440 qc->nbytes = scsi_bufflen(scmd);
e00f1ff3
TH		 2441
2442 /* check whether ATAPI DMA is safe */
2443 if (!using_pio && ata_check_atapi_dma(qc))
2444 using_pio = 1;
1da177e4 2445
1da177e4 2446 if (using_pio || nodata) {
e00f1ff3 2447 /* no data, or PIO data xfer */
1da177e4
LT		 2448 if (nodata)
2449 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2450 else
2451 qc->tf.protocol = ATA_PROT_ATAPI;
2452 qc->tf.lbam = (8 * 1024) & 0xff;
2453 qc->tf.lbah = (8 * 1024) >> 8;
e00f1ff3
TH		 2454 } else {
2455 /* DMA data xfer */
1da177e4
LT		 2456 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2457 qc->tf.feature |= ATAPI_PKT_DMA;
2458
542b1444 2459 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
95de719a 2460 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2461 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2462 }
2463
1da177e4
LT		 2464 return 0;
2465}
2466
41bda9c9 2467static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
ab5b3a5b 2468{
41bda9c9
TH		 2469 if (ap->nr_pmp_links == 0) {
2470 if (likely(devno < ata_link_max_devices(&ap->link)))
2471 return &ap->link.device[devno];
2472 } else {
2473 if (likely(devno < ap->nr_pmp_links))
2474 return &ap->pmp_link[devno].device[0];
2475 }
2476
ab5b3a5b
TH		 2477 return NULL;
2478}
2479
2480static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2481 const struct scsi_device *scsidev)
2482{
41bda9c9
TH		 2483 int devno;
2484
ab5b3a5b 2485 /* skip commands not addressed to targets we simulate */
41bda9c9
TH		 2486 if (ap->nr_pmp_links == 0) {
2487 if (unlikely(scsidev->channel || scsidev->lun))
2488 return NULL;
2489 devno = scsidev->id;
2490 } else {
2491 if (unlikely(scsidev->id || scsidev->lun))
2492 return NULL;
2493 devno = scsidev->channel;
2494 }
ab5b3a5b 2495
41bda9c9 2496 return ata_find_dev(ap, devno);
ab5b3a5b
TH		 2497}
2498
99ba9e09
BK		 2499/**
2500 * ata_scsi_dev_enabled - determine if device is enabled
2501 * @dev: ATA device
2502 *
2503 * Determine if commands should be sent to the specified device.
2504 *
2505 * LOCKING:
cca3974e 2506 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2507 *
2508 * RETURNS:
2509 * 0 if commands are not allowed / 1 if commands are allowed
2510 */
2511
2512static int ata_scsi_dev_enabled(struct ata_device *dev)
2513{
2514 if (unlikely(!ata_dev_enabled(dev)))
2515 return 0;
2516
9af5c9c9 2517 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
99ba9e09
BK		 2518 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2519 ata_dev_printk(dev, KERN_WARNING,
2520 "WARNING: ATAPI is %s, device ignored.\n",
2521 atapi_enabled ? "not supported with this driver" : "disabled");
2522 return 0;
2523 }
2524 }
2525
2526 return 1;
2527}
2528
1da177e4
LT		 2529/**
2530 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2531 * @ap: ATA port to which the device is attached
2532 * @scsidev: SCSI device from which we derive the ATA device
2533 *
2534 * Given various information provided in struct scsi_cmnd,
2535 * map that onto an ATA bus, and using that mapping
2536 * determine which ata_device is associated with the
2537 * SCSI command to be sent.
2538 *
2539 * LOCKING:
cca3974e 2540 * spin_lock_irqsave(host lock)
1da177e4
LT		 2541 *
2542 * RETURNS:
2543 * Associated ATA device, or %NULL if not found.
2544 */
1da177e4 2545static struct ata_device *
057ace5e 2546ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2547{
ab5b3a5b 2548 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2549
99ba9e09 2550 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2551 return NULL;
2552
1da177e4
LT		 2553 return dev;
2554}
2555
b095518e
JG		 2556/*
2557 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2558 * @byte1: Byte 1 from pass-thru CDB.
2559 *
2560 * RETURNS:
2561 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2562 */
2563static u8
2564ata_scsi_map_proto(u8 byte1)
2565{
2566 switch((byte1 & 0x1e) >> 1) {
2567 case 3: /* Non-data */
2568 return ATA_PROT_NODATA;
2569
2570 case 6: /* DMA */
23cb1d71
AL		 2571 case 10: /* UDMA Data-in */
2572 case 11: /* UDMA Data-Out */
b095518e
JG		 2573 return ATA_PROT_DMA;
2574
2575 case 4: /* PIO Data-in */
2576 case 5: /* PIO Data-out */
b095518e
JG		 2577 return ATA_PROT_PIO;
2578
b095518e
JG		 2579 case 0: /* Hard Reset */
2580 case 1: /* SRST */
f93f1078
AL		 2581 case 8: /* Device Diagnostic */
2582 case 9: /* Device Reset */
2583 case 7: /* DMA Queued */
f93f1078
AL		 2584 case 12: /* FPDMA */
2585 case 15: /* Return Response Info */
b095518e
JG		 2586 default: /* Reserved */
2587 break;
2588 }
2589
2590 return ATA_PROT_UNKNOWN;
2591}
2592
2593/**
2594 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2595 * @qc: command structure to be initialized
b095518e
JG		 2596 *
2597 * Handles either 12 or 16-byte versions of the CDB.
2598 *
2599 * RETURNS:
2600 * Zero on success, non-zero on failure.
2601 */
ad706991 2602static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
b095518e
JG		 2603{
2604 struct ata_taskfile *tf = &(qc->tf);
542b1444 2605 struct scsi_cmnd *scmd = qc->scsicmd;
f79d409f 2606 struct ata_device *dev = qc->dev;
ad706991 2607 const u8 *cdb = scmd->cmnd;
b095518e 2608
542b1444 2609 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
9a405257 2610 goto invalid_fld;
8190bdb9 2611
f79d409f
AC		 2612 /* We may not issue DMA commands if no DMA mode is set */
2613 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2614 goto invalid_fld;
b095518e
JG		 2615
2616 /*
2617 * 12 and 16 byte CDBs use different offsets to
2618 * provide the various register values.
2619 */
542b1444 2620 if (cdb[0] == ATA_16) {
b095518e
JG		 2621 /*
2622 * 16-byte CDB - may contain extended commands.
2623 *
2624 * If that is the case, copy the upper byte register values.
2625 */
542b1444
TH		 2626 if (cdb[1] & 0x01) {
2627 tf->hob_feature = cdb[3];
2628 tf->hob_nsect = cdb[5];
2629 tf->hob_lbal = cdb[7];
2630 tf->hob_lbam = cdb[9];
2631 tf->hob_lbah = cdb[11];
b095518e
JG		 2632 tf->flags |= ATA_TFLAG_LBA48;
2633 } else
2634 tf->flags &= ~ATA_TFLAG_LBA48;
2635
2636 /*
2637 * Always copy low byte, device and command registers.
2638 */
542b1444
TH		 2639 tf->feature = cdb[4];
2640 tf->nsect = cdb[6];
2641 tf->lbal = cdb[8];
2642 tf->lbam = cdb[10];
2643 tf->lbah = cdb[12];
2644 tf->device = cdb[13];
2645 tf->command = cdb[14];
b095518e
JG		 2646 } else {
2647 /*
2648 * 12-byte CDB - incapable of extended commands.
2649 */
2650 tf->flags &= ~ATA_TFLAG_LBA48;
2651
542b1444
TH		 2652 tf->feature = cdb[3];
2653 tf->nsect = cdb[4];
2654 tf->lbal = cdb[5];
2655 tf->lbam = cdb[6];
2656 tf->lbah = cdb[7];
2657 tf->device = cdb[8];
2658 tf->command = cdb[9];
b095518e 2659 }
fa4453c4
AL		 2660
2661 /* enforce correct master/slave bit */
2662 tf->device = dev->devno ?
2663 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e 2664
1dce589c
AL		 2665 /* sanity check for pio multi commands */
2666 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2667 goto invalid_fld;
2668
2669 if (is_multi_taskfile(tf)) {
2670 unsigned int multi_count = 1 << (cdb[1] >> 5);
2671
2672 /* compare the passed through multi_count
2673 * with the cached multi_count of libata
2674 */
2675 if (multi_count != dev->multi_count)
2676 ata_dev_printk(dev, KERN_WARNING,
2677 "invalid multi_count %u ignored\n",
2678 multi_count);
d26fc955 2679 }
1dce589c 2680
5a5dbd18
ML		 2681 /* READ/WRITE LONG use a non-standard sect_size */
2682 qc->sect_size = ATA_SECT_SIZE;
2683 switch (tf->command) {
2684 case ATA_CMD_READ_LONG:
2685 case ATA_CMD_READ_LONG_ONCE:
2686 case ATA_CMD_WRITE_LONG:
2687 case ATA_CMD_WRITE_LONG_ONCE:
2688 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2689 goto invalid_fld;
7120165c 2690 qc->sect_size = scsi_bufflen(scmd);
5a5dbd18
ML		 2691 }
2692
b095518e
JG		 2693 /*
2694 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2695 * SET_FEATURES - XFER MODE must be preceded/succeeded
2696 * by an update to hardware-specific registers for each
2697 * controller (i.e. the reason for ->set_piomode(),
2698 * ->set_dmamode(), and ->post_set_mode() hooks).
2699 */
2700 if ((tf->command == ATA_CMD_SET_FEATURES)
2701 && (tf->feature == SETFEATURES_XFER))
9a405257 2702 goto invalid_fld;
b095518e
JG		 2703
2704 /*
2705 * Set flags so that all registers will be written,
2706 * and pass on write indication (used for PIO/DMA
2707 * setup.)
2708 */
2709 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2710
542b1444 2711 if (scmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2712 tf->flags |= ATA_TFLAG_WRITE;
2713
2714 /*
2715 * Set transfer length.
2716 *
2717 * TODO: find out if we need to do more here to
2718 * cover scatter/gather case.
2719 */
7120165c 2720 qc->nbytes = scsi_bufflen(scmd);
b095518e 2721
e61e0672
TH		 2722 /* request result TF */
2723 qc->flags |= ATA_QCFLAG_RESULT_TF;
2724
b095518e 2725 return 0;
9a405257
TH		 2726
2727 invalid_fld:
542b1444 2728 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
9a405257
TH		 2729 /* "Invalid field in cdb" */
2730 return 1;
b095518e
JG		 2731}
2732
1da177e4
LT		 2733/**
2734 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2735 * @dev: ATA device
2736 * @cmd: SCSI command opcode to consider
2737 *
2738 * Look up the SCSI command given, and determine whether the
2739 * SCSI command is to be translated or simulated.
2740 *
2741 * RETURNS:
2742 * Pointer to translation function if possible, %NULL if not.
2743 */
2744
2745static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2746{
2747 switch (cmd) {
2748 case READ_6:
2749 case READ_10:
2750 case READ_16:
2751
2752 case WRITE_6:
2753 case WRITE_10:
2754 case WRITE_16:
2755 return ata_scsi_rw_xlat;
2756
2757 case SYNCHRONIZE_CACHE:
2758 if (ata_try_flush_cache(dev))
2759 return ata_scsi_flush_xlat;
2760 break;
2761
2762 case VERIFY:
2763 case VERIFY_16:
2764 return ata_scsi_verify_xlat;
b095518e
JG		 2765
2766 case ATA_12:
2767 case ATA_16:
2768 return ata_scsi_pass_thru;
da61396d 2769
972dcafb
DG		 2770 case START_STOP:
2771 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2772 }
2773
2774 return NULL;
2775}
2776
2777/**
2778 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2779 * @ap: ATA port to which the command was being sent
2780 * @cmd: SCSI command to dump
2781 *
2782 * Prints the contents of a SCSI command via printk().
2783 */
2784
2785static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2786 struct scsi_cmnd *cmd)
2787{
2788#ifdef ATA_DEBUG
2789 struct scsi_device *scsidev = cmd->device;
2790 u8 *scsicmd = cmd->cmnd;
2791
2792 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
44877b4e 2793 ap->print_id,
1da177e4
LT		 2794 scsidev->channel, scsidev->id, scsidev->lun,
2795 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2796 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2797 scsicmd[8]);
2798#endif
2799}
2800
542b1444 2801static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2115ea94
TH		 2802 void (*done)(struct scsi_cmnd *),
2803 struct ata_device *dev)
eb3f0f9c 2804{
baf4fdfa
ML		 2805 u8 scsi_op = scmd->cmnd[0];
2806 ata_xlat_func_t xlat_func;
2115ea94
TH		 2807 int rc = 0;
2808
eb3f0f9c 2809 if (dev->class == ATA_DEV_ATA) {
baf4fdfa
ML		 2810 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2811 goto bad_cdb_len;
eb3f0f9c 2812
baf4fdfa
ML		 2813 xlat_func = ata_get_xlat_func(dev, scsi_op);
2814 } else {
2815 if (unlikely(!scmd->cmd_len))
2816 goto bad_cdb_len;
2817
2818 xlat_func = NULL;
2819 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2820 /* relay SCSI command to ATAPI device */
2821 if (unlikely(scmd->cmd_len > dev->cdb_len))
2822 goto bad_cdb_len;
2823
2824 xlat_func = atapi_xlat;
2825 } else {
2826 /* ATA_16 passthru, treat as an ATA command */
2827 if (unlikely(scmd->cmd_len > 16))
2828 goto bad_cdb_len;
2829
2830 xlat_func = ata_get_xlat_func(dev, scsi_op);
2831 }
2832 }
2833
2834 if (xlat_func)
2835 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2836 else
2837 ata_scsi_simulate(dev, scmd, done);
2115ea94
TH		 2838
2839 return rc;
baf4fdfa
ML		 2840
2841 bad_cdb_len:
2842 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2843 scmd->cmd_len, scsi_op, dev->cdb_len);
2844 scmd->result = DID_ERROR << 16;
2845 done(scmd);
2846 return 0;
eb3f0f9c
BK		 2847}
2848
1da177e4
LT		 2849/**
2850 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2851 * @cmd: SCSI command to be sent
2852 * @done: Completion function, called when command is complete
2853 *
2854 * In some cases, this function translates SCSI commands into
2855 * ATA taskfiles, and queues the taskfiles to be sent to
2856 * hardware. In other cases, this function simulates a
2857 * SCSI device by evaluating and responding to certain
2858 * SCSI commands. This creates the overall effect of
2859 * ATA and ATAPI devices appearing as SCSI devices.
2860 *
2861 * LOCKING:
cca3974e 2862 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2863 *
2864 * RETURNS:
2115ea94
TH		 2865 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2866 * 0 otherwise.
1da177e4 2867 */
1da177e4
LT		 2868int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2869{
2870 struct ata_port *ap;
2871 struct ata_device *dev;
2872 struct scsi_device *scsidev = cmd->device;
005a5a06 2873 struct Scsi_Host *shost = scsidev->host;
2115ea94 2874 int rc = 0;
1da177e4 2875
35bb94b1 2876 ap = ata_shost_to_port(shost);
005a5a06
JG		 2877
2878 spin_unlock(shost->host_lock);
ba6a1308 2879 spin_lock(ap->lock);
1da177e4
LT		 2880
2881 ata_scsi_dump_cdb(ap, cmd);
2882
2883 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2884 if (likely(dev))
2115ea94 2885 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2886 else {
1da177e4
LT		 2887 cmd->result = (DID_BAD_TARGET << 16);
2888 done(cmd);
1da177e4
LT		 2889 }
2890
ba6a1308 2891 spin_unlock(ap->lock);
005a5a06 2892 spin_lock(shost->host_lock);
2115ea94 2893 return rc;
1da177e4
LT		 2894}
2895
2896/**
2897 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2898 * @dev: the target device
1da177e4
LT		 2899 * @cmd: SCSI command being sent to device.
2900 * @done: SCSI command completion function.
2901 *
2902 * Interprets and directly executes a select list of SCSI commands
2903 * that can be handled internally.
2904 *
2905 * LOCKING:
cca3974e 2906 * spin_lock_irqsave(host lock)
1da177e4
LT		 2907 */
2908
3373efd8 2909void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2910 void (*done)(struct scsi_cmnd *))
2911{
2912 struct ata_scsi_args args;
057ace5e 2913 const u8 *scsicmd = cmd->cmnd;
45394145 2914 u8 tmp8;
1da177e4 2915
9a3dccc4
TH		 2916 args.dev = dev;
2917 args.id = dev->id;
1da177e4
LT		 2918 args.cmd = cmd;
2919 args.done = done;
2920
2921 switch(scsicmd[0]) {
00bd0202
JG		 2922 /* TODO: worth improving? */
2923 case FORMAT_UNIT:
2924 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2925 break;
2926
2927 case INQUIRY:
2928 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2929 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2930 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2931 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
ad355b46
JG		 2932 else switch (scsicmd[2]) {
2933 case 0x00:
1da177e4 2934 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
ad355b46
JG		 2935 break;
2936 case 0x80:
1da177e4 2937 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
ad355b46
JG		 2938 break;
2939 case 0x83:
1da177e4 2940 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
ad355b46
JG		 2941 break;
2942 case 0x89:
2943 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2944 break;
2945 default:
ae006510 2946 ata_scsi_invalid_field(cmd, done);
ad355b46
JG		 2947 break;
2948 }
1da177e4
LT		 2949 break;
2950
2951 case MODE_SENSE:
2952 case MODE_SENSE_10:
2953 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2954 break;
2955
2956 case MODE_SELECT: /* unconditionally return */
2957 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2958 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2959 break;
2960
2961 case READ_CAPACITY:
2962 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2963 break;
2964
2965 case SERVICE_ACTION_IN:
2966 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2967 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2968 else
ae006510 2969 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2970 break;
2971
2972 case REPORT_LUNS:
2973 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2974 break;
2975
1da177e4 2976 case REQUEST_SENSE:
45394145
JG		 2977 ata_scsi_set_sense(cmd, 0, 0, 0);
2978 cmd->result = (DRIVER_SENSE << 24);
2979 done(cmd);
2980 break;
2981
00bd0202
JG		 2982 /* if we reach this, then writeback caching is disabled,
2983 * turning this into a no-op.
2984 */
2985 case SYNCHRONIZE_CACHE:
2986 /* fall through */
2987
2988 /* no-op's, complete with success */
2989 case REZERO_UNIT:
2990 case SEEK_6:
2991 case SEEK_10:
2992 case TEST_UNIT_READY:
2993 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2994 break;
2995
45394145
JG		 2996 case SEND_DIAGNOSTIC:
2997 tmp8 = scsicmd[1] & ~(1 << 3);
2998 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2999 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3000 else
3001 ata_scsi_invalid_field(cmd, done);
3002 break;
1da177e4
LT		 3003
3004 /* all other commands */
3005 default:
ae006510
DG		 3006 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3007 /* "Invalid command operation code" */
3008 done(cmd);
1da177e4
LT		 3009 break;
3010 }
3011}
3012
f3187195
TH		 3013int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3014{
3015 int i, rc;
3016
3017 for (i = 0; i < host->n_ports; i++) {
3018 struct ata_port *ap = host->ports[i];
3019 struct Scsi_Host *shost;
3020
3021 rc = -ENOMEM;
3022 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3023 if (!shost)
3024 goto err_alloc;
3025
3026 *(struct ata_port **)&shost->hostdata[0] = ap;
3027 ap->scsi_host = shost;
3028
3029 shost->transportt = &ata_scsi_transport_template;
3030 shost->unique_id = ap->print_id;
3031 shost->max_id = 16;
3032 shost->max_lun = 1;
3033 shost->max_channel = 1;
3034 shost->max_cmd_len = 16;
3035
3036 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3037 if (rc)
3038 goto err_add;
3039 }
3040
3041 return 0;
3042
3043 err_add:
3044 scsi_host_put(host->ports[i]->scsi_host);
3045 err_alloc:
3046 while (--i >= 0) {
3047 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3048
3049 scsi_remove_host(shost);
3050 scsi_host_put(shost);
3051 }
3052 return rc;
3053}
3054
1ae46317 3055void ata_scsi_scan_host(struct ata_port *ap, int sync)
644dd0cc 3056{
1ae46317
TH		 3057 int tries = 5;
3058 struct ata_device *last_failed_dev = NULL;
41bda9c9 3059 struct ata_link *link;
1ae46317 3060 struct ata_device *dev;
644dd0cc 3061
198e0fed 3062 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 3063 return;
3064
1ae46317 3065 repeat:
41bda9c9
TH		 3066 ata_port_for_each_link(link, ap) {
3067 ata_link_for_each_dev(dev, link) {
3068 struct scsi_device *sdev;
3069 int channel = 0, id = 0;
3edebac4 3070
41bda9c9
TH		 3071 if (!ata_dev_enabled(dev) || dev->sdev)
3072 continue;
3f19ee8c 3073
41bda9c9
TH		 3074 if (ata_is_host_link(link))
3075 id = dev->devno;
3076 else
3077 channel = link->pmp;
3078
3079 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3080 NULL);
3081 if (!IS_ERR(sdev)) {
3082 dev->sdev = sdev;
3083 scsi_device_put(sdev);
3084 }
3edebac4 3085 }
3f19ee8c 3086 }
1ae46317
TH		 3087
3088 /* If we scanned while EH was in progress or allocation
3089 * failure occurred, scan would have failed silently. Check
3090 * whether all devices are attached.
3091 */
41bda9c9
TH		 3092 ata_port_for_each_link(link, ap) {
3093 ata_link_for_each_dev(dev, link) {
3094 if (ata_dev_enabled(dev) && !dev->sdev)
3095 goto exit_loop;
3096 }
1ae46317 3097 }
41bda9c9
TH		 3098 exit_loop:
3099 if (!link)
1ae46317
TH		 3100 return;
3101
3102 /* we're missing some SCSI devices */
3103 if (sync) {
3104 /* If caller requested synchrnous scan && we've made
3105 * any progress, sleep briefly and repeat.
3106 */
3107 if (dev != last_failed_dev) {
3108 msleep(100);
3109 last_failed_dev = dev;
3110 goto repeat;
3111 }
3112
3113 /* We might be failing to detect boot device, give it
3114 * a few more chances.
3115 */
3116 if (--tries) {
3117 msleep(100);
3118 goto repeat;
3119 }
3120
3121 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3122 "failed without making any progress,\n"
3123 " switching to async\n");
3124 }
3125
3126 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3127 round_jiffies_relative(HZ));
644dd0cc 3128}
0ea035a3
TH		 3129
3130/**
3131 * ata_scsi_offline_dev - offline attached SCSI device
3132 * @dev: ATA device to offline attached SCSI device for
3133 *
3134 * This function is called from ata_eh_hotplug() and responsible
3135 * for taking the SCSI device attached to @dev offline. This
cca3974e 3136 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3137 * against clearing.
3138 *
3139 * LOCKING:
cca3974e 3140 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3141 *
3142 * RETURNS:
3143 * 1 if attached SCSI device exists, 0 otherwise.
3144 */
3145int ata_scsi_offline_dev(struct ata_device *dev)
3146{
3147 if (dev->sdev) {
3148 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3149 return 1;
3150 }
3151 return 0;
3152}
580b2102
TH		 3153
3154/**
3155 * ata_scsi_remove_dev - remove attached SCSI device
3156 * @dev: ATA device to remove attached SCSI device for
3157 *
3158 * This function is called from ata_eh_scsi_hotplug() and
3159 * responsible for removing the SCSI device attached to @dev.
3160 *
3161 * LOCKING:
3162 * Kernel thread context (may sleep).
3163 */
3164static void ata_scsi_remove_dev(struct ata_device *dev)
3165{
9af5c9c9 3166 struct ata_port *ap = dev->link->ap;
580b2102
TH		 3167 struct scsi_device *sdev;
3168 unsigned long flags;
3169
3170 /* Alas, we need to grab scan_mutex to ensure SCSI device
3171 * state doesn't change underneath us and thus
3172 * scsi_device_get() always succeeds. The mutex locking can
3173 * be removed if there is __scsi_device_get() interface which
3174 * increments reference counts regardless of device state.
3175 */
cca3974e 3176 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3177 spin_lock_irqsave(ap->lock, flags);
580b2102 3178
cca3974e 3179 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3180 sdev = dev->sdev;
3181 dev->sdev = NULL;
3182
3183 if (sdev) {
3184 /* If user initiated unplug races with us, sdev can go
cca3974e 3185 * away underneath us after the host lock and
580b2102
TH		 3186 * scan_mutex are released. Hold onto it.
3187 */
3188 if (scsi_device_get(sdev) == 0) {
3189 /* The following ensures the attached sdev is
3190 * offline on return from ata_scsi_offline_dev()
3191 * regardless it wins or loses the race
3192 * against this function.
3193 */
3194 scsi_device_set_state(sdev, SDEV_OFFLINE);
3195 } else {
3196 WARN_ON(1);
3197 sdev = NULL;
3198 }
3199 }
3200
ba6a1308 3201 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3202 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3203
3204 if (sdev) {
3205 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3206 sdev->sdev_gendev.bus_id);
3207
3208 scsi_remove_device(sdev);
3209 scsi_device_put(sdev);
3210 }
3211}
3212
41bda9c9
TH		 3213static void ata_scsi_handle_link_detach(struct ata_link *link)
3214{
3215 struct ata_port *ap = link->ap;
3216 struct ata_device *dev;
3217
3218 ata_link_for_each_dev(dev, link) {
3219 unsigned long flags;
3220
3221 if (!(dev->flags & ATA_DFLAG_DETACHED))
3222 continue;
3223
3224 spin_lock_irqsave(ap->lock, flags);
3225 dev->flags &= ~ATA_DFLAG_DETACHED;
3226 spin_unlock_irqrestore(ap->lock, flags);
3227
3228 ata_scsi_remove_dev(dev);
3229 }
3230}
3231
2f294968
KCA		 3232/**
3233 * ata_scsi_media_change_notify - send media change event
3234 * @atadev: Pointer to the disk device with media change event
3235 *
3236 * Tell the block layer to send a media change notification
3237 * event.
3238 *
3239 * LOCKING:
3240 * interrupt context, may not sleep.
3241 */
3242void ata_scsi_media_change_notify(struct ata_device *atadev)
3243{
3244#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3245 scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
3246#endif
3247}
3248EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
3249
580b2102
TH		 3250/**
3251 * ata_scsi_hotplug - SCSI part of hotplug
65f27f38 3252 * @work: Pointer to ATA port to perform SCSI hotplug on
580b2102
TH		 3253 *
3254 * Perform SCSI part of hotplug. It's executed from a separate
3255 * workqueue after EH completes. This is necessary because SCSI
3256 * hot plugging requires working EH and hot unplugging is
3257 * synchronized with hot plugging with a mutex.
3258 *
3259 * LOCKING:
3260 * Kernel thread context (may sleep).
3261 */
65f27f38 3262void ata_scsi_hotplug(struct work_struct *work)
580b2102 3263{
65f27f38
DH		 3264 struct ata_port *ap =
3265 container_of(work, struct ata_port, hotplug_task.work);
41bda9c9 3266 int i;
580b2102 3267
b51e9e5d 3268 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3269 DPRINTK("ENTER/EXIT - unloading\n");
3270 return;
3271 }
3272
3273 DPRINTK("ENTER\n");
3274
41bda9c9
TH		 3275 /* Unplug detached devices. We cannot use link iterator here
3276 * because PMP links have to be scanned even if PMP is
3277 * currently not attached. Iterate manually.
3278 */
3279 ata_scsi_handle_link_detach(&ap->link);
3280 if (ap->pmp_link)
3281 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3282 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
580b2102
TH		 3283
3284 /* scan for new ones */
1ae46317 3285 ata_scsi_scan_host(ap, 0);
580b2102
TH		 3286
3287 DPRINTK("EXIT\n");
3288}
83c47bcb
TH		 3289
3290/**
3291 * ata_scsi_user_scan - indication for user-initiated bus scan
3292 * @shost: SCSI host to scan
3293 * @channel: Channel to scan
3294 * @id: ID to scan
3295 * @lun: LUN to scan
3296 *
3297 * This function is called when user explicitly requests bus
3298 * scan. Set probe pending flag and invoke EH.
3299 *
3300 * LOCKING:
3301 * SCSI layer (we don't care)
3302 *
3303 * RETURNS:
3304 * Zero.
3305 */
3306static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3307 unsigned int id, unsigned int lun)
3308{
3309 struct ata_port *ap = ata_shost_to_port(shost);
3310 unsigned long flags;
41bda9c9 3311 int devno, rc = 0;
83c47bcb
TH		 3312
3313 if (!ap->ops->error_handler)
3314 return -EOPNOTSUPP;
3315
41bda9c9 3316 if (lun != SCAN_WILD_CARD && lun)
83c47bcb
TH		 3317 return -EINVAL;
3318
41bda9c9
TH		 3319 if (ap->nr_pmp_links == 0) {
3320 if (channel != SCAN_WILD_CARD && channel)
3321 return -EINVAL;
3322 devno = id;
3323 } else {
3324 if (id != SCAN_WILD_CARD && id)
3325 return -EINVAL;
3326 devno = channel;
3327 }
3328
ba6a1308 3329 spin_lock_irqsave(ap->lock, flags);
83c47bcb 3330
41bda9c9
TH		 3331 if (devno == SCAN_WILD_CARD) {
3332 struct ata_link *link;
3333
3334 ata_port_for_each_link(link, ap) {
3335 struct ata_eh_info *ehi = &link->eh_info;
3336 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3337 ehi->action |= ATA_EH_SOFTRESET;
3338 }
83c47bcb 3339 } else {
41bda9c9 3340 struct ata_device *dev = ata_find_dev(ap, devno);
83c47bcb
TH		 3341
3342 if (dev) {
41bda9c9 3343 struct ata_eh_info *ehi = &dev->link->eh_info;
9af5c9c9
TH		 3344 ehi->probe_mask |= 1 << dev->devno;
3345 ehi->action |= ATA_EH_SOFTRESET;
3346 ehi->flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3347 } else
3348 rc = -EINVAL;
3349 }
3350
309afcb5 3351 if (rc == 0) {
83c47bcb 3352 ata_port_schedule_eh(ap);
309afcb5
TH		 3353 spin_unlock_irqrestore(ap->lock, flags);
3354 ata_port_wait_eh(ap);
3355 } else
3356 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3357
3358 return rc;
3359}
3057ac3c 3360
3361/**
d0171269 3362 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
65f27f38 3363 * @work: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3364 *
d0171269
TH		 3365 * After ATA pass thru (SAT) commands are executed successfully,
3366 * libata need to propagate the changes to SCSI layer. This
3367 * function must be executed from ata_aux_wq such that sdev
3368 * attach/detach don't race with rescan.
3057ac3c 3369 *
d0171269
TH		 3370 * LOCKING:
3371 * Kernel thread context (may sleep).
3057ac3c 3372 */
65f27f38 3373void ata_scsi_dev_rescan(struct work_struct *work)
3057ac3c 3374{
65f27f38
DH		 3375 struct ata_port *ap =
3376 container_of(work, struct ata_port, scsi_rescan_task);
41bda9c9 3377 struct ata_link *link;
f58229f8 3378 struct ata_device *dev;
f84e7e41 3379 unsigned long flags;
3057ac3c 3380
f84e7e41
TH		 3381 spin_lock_irqsave(ap->lock, flags);
3382
41bda9c9
TH		 3383 ata_port_for_each_link(link, ap) {
3384 ata_link_for_each_dev(dev, link) {
3385 struct scsi_device *sdev = dev->sdev;
3057ac3c 3386
41bda9c9
TH		 3387 if (!ata_dev_enabled(dev) || !sdev)
3388 continue;
3389 if (scsi_device_get(sdev))
3390 continue;
f84e7e41 3391
41bda9c9
TH		 3392 spin_unlock_irqrestore(ap->lock, flags);
3393 scsi_rescan_device(&(sdev->sdev_gendev));
3394 scsi_device_put(sdev);
3395 spin_lock_irqsave(ap->lock, flags);
3396 }
3057ac3c 3397 }
f84e7e41
TH		 3398
3399 spin_unlock_irqrestore(ap->lock, flags);
3057ac3c 3400}
80289167
BK		 3401
3402/**
3403 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3404 * @host: ATA host container for all SAS ports
80289167 3405 * @port_info: Information from low-level host driver
cca3974e 3406 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3407 *
3408 * LOCKING:
3409 * PCI/etc. bus probe sem.
3410 *
3411 * RETURNS:
3412 * ata_port pointer on success / NULL on failure.
3413 */
3414
cca3974e 3415struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3416 struct ata_port_info *port_info,
cca3974e 3417 struct Scsi_Host *shost)
80289167 3418{
f3187195 3419 struct ata_port *ap;
80289167 3420
f3187195 3421 ap = ata_port_alloc(host);
80289167
BK		 3422 if (!ap)
3423 return NULL;
3424
f3187195 3425 ap->port_no = 0;
cca3974e 3426 ap->lock = shost->host_lock;
f3187195
TH		 3427 ap->pio_mask = port_info->pio_mask;
3428 ap->mwdma_mask = port_info->mwdma_mask;
3429 ap->udma_mask = port_info->udma_mask;
3430 ap->flags |= port_info->flags;
3431 ap->ops = port_info->port_ops;
3432 ap->cbl = ATA_CBL_SATA;
3433
80289167
BK		 3434 return ap;
3435}
3436EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3437
3438/**
3439 * ata_sas_port_start - Set port up for dma.
3440 * @ap: Port to initialize
3441 *
3442 * Called just after data structures for each port are
3443 * initialized. Allocates DMA pad.
3444 *
3445 * May be used as the port_start() entry in ata_port_operations.
3446 *
3447 * LOCKING:
3448 * Inherited from caller.
3449 */
3450int ata_sas_port_start(struct ata_port *ap)
3451{
3452 return ata_pad_alloc(ap, ap->dev);
3453}
3454EXPORT_SYMBOL_GPL(ata_sas_port_start);
3455
3456/**
3457 * ata_port_stop - Undo ata_sas_port_start()
3458 * @ap: Port to shut down
3459 *
3460 * Frees the DMA pad.
3461 *
3462 * May be used as the port_stop() entry in ata_port_operations.
3463 *
3464 * LOCKING:
3465 * Inherited from caller.
3466 */
3467
3468void ata_sas_port_stop(struct ata_port *ap)
3469{
3470 ata_pad_free(ap, ap->dev);
3471}
3472EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3473
3474/**
3475 * ata_sas_port_init - Initialize a SATA device
3476 * @ap: SATA port to initialize
3477 *
3478 * LOCKING:
3479 * PCI/etc. bus probe sem.
3480 *
3481 * RETURNS:
3482 * Zero on success, non-zero on error.
3483 */
3484
3485int ata_sas_port_init(struct ata_port *ap)
3486{
3487 int rc = ap->ops->port_start(ap);
3488
f3187195
TH		 3489 if (!rc) {
3490 ap->print_id = ata_print_id++;
80289167 3491 rc = ata_bus_probe(ap);
f3187195 3492 }
80289167
BK		 3493
3494 return rc;
3495}
3496EXPORT_SYMBOL_GPL(ata_sas_port_init);
3497
3498/**
3499 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3500 * @ap: SATA port to destroy
3501 *
3502 */
3503
3504void ata_sas_port_destroy(struct ata_port *ap)
3505{
f0d36efd
TH		 3506 if (ap->ops->port_stop)
3507 ap->ops->port_stop(ap);
80289167
BK		 3508 kfree(ap);
3509}
3510EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3511
3512/**
3513 * ata_sas_slave_configure - Default slave_config routine for libata devices
3514 * @sdev: SCSI device to configure
3515 * @ap: ATA port to which SCSI device is attached
3516 *
3517 * RETURNS:
3518 * Zero.
3519 */
3520
3521int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3522{
3523 ata_scsi_sdev_config(sdev);
9af5c9c9 3524 ata_scsi_dev_config(sdev, ap->link.device);
80289167
BK		 3525 return 0;
3526}
3527EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3528
3529/**
3530 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3531 * @cmd: SCSI command to be sent
3532 * @done: Completion function, called when command is complete
3533 * @ap: ATA port to which the command is being sent
3534 *
3535 * RETURNS:
08475a19
BK		 3536 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3537 * 0 otherwise.
80289167
BK		 3538 */
3539
3540int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3541 struct ata_port *ap)
3542{
08475a19
BK		 3543 int rc = 0;
3544
80289167
BK		 3545 ata_scsi_dump_cdb(ap, cmd);
3546
9af5c9c9
TH		 3547 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3548 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
80289167
BK		 3549 else {
3550 cmd->result = (DID_BAD_TARGET << 16);
3551 done(cmd);
3552 }
08475a19 3553 return rc;
80289167
BK		 3554}
3555EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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