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[net-next-2.6.git] / drivers / ata / libata-scsi.c
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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
057ace5e 54typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
ab5b3a5b
TH		 55
56static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
83c47bcb
TH		 60static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
ab5b3a5b 62
1da177e4 63
00ac37f5
DG		 64#define RW_RECOVERY_MPAGE 0x1
65#define RW_RECOVERY_MPAGE_LEN 12
66#define CACHE_MPAGE 0x8
67#define CACHE_MPAGE_LEN 20
68#define CONTROL_MPAGE 0xa
69#define CONTROL_MPAGE_LEN 12
70#define ALL_MPAGES 0x3f
71#define ALL_SUB_MPAGES 0xff
72
73
74static const u8 def_rw_recovery_mpage[] = {
75 RW_RECOVERY_MPAGE,
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
80 0, 0, 0, 0,
81 0, /* write retry count */
82 0, 0, 0
83};
84
85static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
86 CACHE_MPAGE,
87 CACHE_MPAGE_LEN - 2,
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
91 0, 0, 0, 0, 0, 0, 0
92};
93
94static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE,
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
101};
102
30afc84c
TH		 103/*
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
106 */
107struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 108 .eh_strategy_handler = ata_scsi_error,
30afc84c 109 .eh_timed_out = ata_scsi_timed_out,
ccf68c34 110 .user_scan = ata_scsi_user_scan,
30afc84c
TH		 111};
112
1da177e4 113
ae006510
DG		 114static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
116{
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
119 done(cmd);
120}
121
1da177e4
LT		 122/**
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
128 *
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
133 *
134 * LOCKING:
135 * Defined by the SCSI layer. We don't really care.
136 *
137 * RETURNS:
138 * Zero.
139 */
140int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
142{
143 geom[0] = 255;
144 geom[1] = 63;
145 sector_div(capacity, 255*63);
146 geom[2] = capacity;
147
148 return 0;
149}
150
b095518e
JG		 151/**
152 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 153 * @scsidev: Device to which we are issuing command
b095518e
JG		 154 * @arg: User provided data for issuing command
155 *
156 * LOCKING:
157 * Defined by the SCSI layer. We don't really care.
158 *
159 * RETURNS:
160 * Zero on success, negative errno on error.
161 */
162
163int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
164{
165 int rc = 0;
166 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 167 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 168 int argsize = 0;
85837ebd 169 enum dma_data_direction data_dir;
bbe1fe7e 170 int cmd_result;
b095518e 171
c893a3ae 172 if (arg == NULL)
b095518e
JG		 173 return -EINVAL;
174
175 if (copy_from_user(args, arg, sizeof(args)))
176 return -EFAULT;
177
bbe1fe7e
ET		 178 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
179 if (!sensebuf)
180 return -ENOMEM;
181
b095518e
JG		 182 memset(scsi_cmd, 0, sizeof(scsi_cmd));
183
184 if (args[3]) {
185 argsize = SECTOR_SIZE * args[3];
186 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 187 if (argbuf == NULL) {
188 rc = -ENOMEM;
189 goto error;
190 }
b095518e
JG		 191
192 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
193 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
194 block count in sector count field */
85837ebd 195 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 196 } else {
197 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 198 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 199 data_dir = DMA_NONE;
b095518e
JG		 200 }
201
202 scsi_cmd[0] = ATA_16;
203
204 scsi_cmd[4] = args[2];
205 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
206 scsi_cmd[6] = args[3];
207 scsi_cmd[8] = args[1];
208 scsi_cmd[10] = 0x4f;
209 scsi_cmd[12] = 0xc2;
210 } else {
211 scsi_cmd[6] = args[1];
212 }
213 scsi_cmd[14] = args[0];
214
215 /* Good values for timeout and retries? Values below
216 from scsi_ioctl_send_command() for default case... */
bbe1fe7e
ET		 217 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
218 sensebuf, (10*HZ), 5, 0);
219
220 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
221 u8 *desc = sensebuf + 8;
222 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
223
224 /* If we set cc then ATA pass-through will cause a
225 * check condition even if no error. Filter that. */
226 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
227 struct scsi_sense_hdr sshdr;
228 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
229 &sshdr);
230 if (sshdr.sense_key==0 &&
231 sshdr.asc==0 && sshdr.ascq==0)
232 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
233 }
234
235 /* Send userspace a few ATA registers (same as drivers/ide) */
236 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
237 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
238 args[0] = desc[13]; /* status */
239 args[1] = desc[3]; /* error */
240 args[2] = desc[5]; /* sector count (0:7) */
241 if (copy_to_user(arg, args, sizeof(args)))
242 rc = -EFAULT;
243 }
244 }
245
246
247 if (cmd_result) {
b095518e
JG		 248 rc = -EIO;
249 goto error;
250 }
251
b095518e 252 if ((argbuf)
c893a3ae 253 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 254 rc = -EFAULT;
255error:
bbe1fe7e 256 kfree(sensebuf);
8f760780 257 kfree(argbuf);
b095518e
JG		 258 return rc;
259}
260
261/**
262 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 263 * @scsidev: Device to which we are issuing command
b095518e
JG		 264 * @arg: User provided data for issuing command
265 *
266 * LOCKING:
267 * Defined by the SCSI layer. We don't really care.
268 *
269 * RETURNS:
270 * Zero on success, negative errno on error.
271 */
272int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
273{
274 int rc = 0;
275 u8 scsi_cmd[MAX_COMMAND_SIZE];
276 u8 args[7];
85837ebd 277 struct scsi_sense_hdr sshdr;
b095518e 278
c893a3ae 279 if (arg == NULL)
b095518e
JG		 280 return -EINVAL;
281
282 if (copy_from_user(args, arg, sizeof(args)))
283 return -EFAULT;
284
285 memset(scsi_cmd, 0, sizeof(scsi_cmd));
286 scsi_cmd[0] = ATA_16;
287 scsi_cmd[1] = (3 << 1); /* Non-data */
288 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
289 scsi_cmd[4] = args[1];
290 scsi_cmd[6] = args[2];
291 scsi_cmd[8] = args[3];
292 scsi_cmd[10] = args[4];
293 scsi_cmd[12] = args[5];
294 scsi_cmd[14] = args[0];
295
b095518e 296 /* Good values for timeout and retries? Values below
2e9edbf8 297 from scsi_ioctl_send_command() for default case... */
85837ebd
MC		 298 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
299 (10*HZ), 5))
b095518e 300 rc = -EIO;
b095518e
JG		 301
302 /* Need code to retrieve data from check condition? */
b095518e
JG		 303 return rc;
304}
305
1da177e4
LT		 306int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
307{
1da177e4
LT		 308 int val = -EINVAL, rc = -EINVAL;
309
1da177e4
LT		 310 switch (cmd) {
311 case ATA_IOC_GET_IO32:
312 val = 0;
313 if (copy_to_user(arg, &val, 1))
314 return -EFAULT;
315 return 0;
316
317 case ATA_IOC_SET_IO32:
318 val = (unsigned long) arg;
319 if (val != 0)
320 return -EINVAL;
321 return 0;
322
b095518e
JG		 323 case HDIO_DRIVE_CMD:
324 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
325 return -EACCES;
326 return ata_cmd_ioctl(scsidev, arg);
327
328 case HDIO_DRIVE_TASK:
329 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
330 return -EACCES;
331 return ata_task_ioctl(scsidev, arg);
332
1da177e4
LT		 333 default:
334 rc = -ENOTTY;
335 break;
336 }
337
1da177e4
LT		 338 return rc;
339}
340
341/**
342 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 343 * @dev: ATA device to which the new command is attached
344 * @cmd: SCSI command that originated this ATA command
345 * @done: SCSI command completion function
346 *
347 * Obtain a reference to an unused ata_queued_cmd structure,
348 * which is the basic libata structure representing a single
349 * ATA command sent to the hardware.
350 *
351 * If a command was available, fill in the SCSI-specific
352 * portions of the structure with information on the
353 * current command.
354 *
355 * LOCKING:
cca3974e 356 * spin_lock_irqsave(host lock)
1da177e4
LT		 357 *
358 * RETURNS:
359 * Command allocated, or %NULL if none available.
360 */
3373efd8 361struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
1da177e4
LT		 362 struct scsi_cmnd *cmd,
363 void (*done)(struct scsi_cmnd *))
364{
365 struct ata_queued_cmd *qc;
366
3373efd8 367 qc = ata_qc_new_init(dev);
1da177e4
LT		 368 if (qc) {
369 qc->scsicmd = cmd;
370 qc->scsidone = done;
371
372 if (cmd->use_sg) {
cedc9a47 373 qc->__sg = (struct scatterlist *) cmd->request_buffer;
1da177e4
LT		 374 qc->n_elem = cmd->use_sg;
375 } else {
cedc9a47 376 qc->__sg = &qc->sgent;
1da177e4
LT		 377 qc->n_elem = 1;
378 }
379 } else {
380 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
381 done(cmd);
382 }
383
384 return qc;
385}
386
b095518e
JG		 387/**
388 * ata_dump_status - user friendly display of error info
389 * @id: id of the port in question
390 * @tf: ptr to filled out taskfile
391 *
392 * Decode and dump the ATA error/status registers for the user so
393 * that they have some idea what really happened at the non
394 * make-believe layer.
395 *
396 * LOCKING:
397 * inherited from caller
398 */
399void ata_dump_status(unsigned id, struct ata_taskfile *tf)
400{
401 u8 stat = tf->command, err = tf->feature;
402
403 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
404 if (stat & ATA_BUSY) {
405 printk("Busy }\n"); /* Data is not valid in this case */
406 } else {
407 if (stat & 0x40) printk("DriveReady ");
408 if (stat & 0x20) printk("DeviceFault ");
409 if (stat & 0x10) printk("SeekComplete ");
410 if (stat & 0x08) printk("DataRequest ");
411 if (stat & 0x04) printk("CorrectedError ");
412 if (stat & 0x02) printk("Index ");
413 if (stat & 0x01) printk("Error ");
414 printk("}\n");
415
416 if (err) {
417 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
418 if (err & 0x04) printk("DriveStatusError ");
419 if (err & 0x80) {
420 if (err & 0x04) printk("BadCRC ");
421 else printk("Sector ");
422 }
423 if (err & 0x40) printk("UncorrectableError ");
424 if (err & 0x10) printk("SectorIdNotFound ");
425 if (err & 0x02) printk("TrackZeroNotFound ");
426 if (err & 0x01) printk("AddrMarkNotFound ");
427 printk("}\n");
428 }
429 }
430}
431
d6f26d1f
TH		 432/**
433 * ata_scsi_device_suspend - suspend ATA device associated with sdev
434 * @sdev: the SCSI device to suspend
3c5100c1 435 * @mesg: target power management message
d6f26d1f
TH		 436 *
437 * Request suspend EH action on the ATA device associated with
438 * @sdev and wait for the operation to complete.
439 *
440 * LOCKING:
441 * Kernel thread context (may sleep).
442 *
443 * RETURNS:
444 * 0 on success, -errno otherwise.
445 */
3c5100c1 446int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
9b847548 447{
35bb94b1 448 struct ata_port *ap = ata_shost_to_port(sdev->host);
d6f26d1f
TH		 449 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
450 unsigned long flags;
451 unsigned int action;
452 int rc = 0;
453
454 if (!dev)
455 goto out;
456
457 spin_lock_irqsave(ap->lock, flags);
458
459 /* wait for the previous resume to complete */
460 while (dev->flags & ATA_DFLAG_SUSPENDED) {
461 spin_unlock_irqrestore(ap->lock, flags);
462 ata_port_wait_eh(ap);
463 spin_lock_irqsave(ap->lock, flags);
464 }
465
466 /* if @sdev is already detached, nothing to do */
467 if (sdev->sdev_state == SDEV_OFFLINE ||
468 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
469 goto out_unlock;
470
471 /* request suspend */
472 action = ATA_EH_SUSPEND;
3c5100c1 473 if (mesg.event != PM_EVENT_SUSPEND)
d6f26d1f
TH		 474 action |= ATA_EH_PM_FREEZE;
475 ap->eh_info.dev_action[dev->devno] |= action;
476 ap->eh_info.flags |= ATA_EHI_QUIET;
477 ata_port_schedule_eh(ap);
478
479 spin_unlock_irqrestore(ap->lock, flags);
9b847548 480
d6f26d1f
TH		 481 /* wait for EH to do the job */
482 ata_port_wait_eh(ap);
483
484 spin_lock_irqsave(ap->lock, flags);
485
486 /* If @sdev is still attached but the associated ATA device
487 * isn't suspended, the operation failed.
488 */
489 if (sdev->sdev_state != SDEV_OFFLINE &&
490 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
491 !(dev->flags & ATA_DFLAG_SUSPENDED))
492 rc = -EIO;
493
494 out_unlock:
495 spin_unlock_irqrestore(ap->lock, flags);
496 out:
497 if (rc == 0)
3c5100c1 498 sdev->sdev_gendev.power.power_state = mesg;
d6f26d1f 499 return rc;
9b847548
JA		 500}
501
d6f26d1f
TH		 502/**
503 * ata_scsi_device_resume - resume ATA device associated with sdev
504 * @sdev: the SCSI device to resume
505 *
506 * Request resume EH action on the ATA device associated with
507 * @sdev and return immediately. This enables parallel
508 * wakeup/spinup of devices.
509 *
510 * LOCKING:
511 * Kernel thread context (may sleep).
512 *
513 * RETURNS:
514 * 0.
515 */
516int ata_scsi_device_resume(struct scsi_device *sdev)
9b847548 517{
35bb94b1 518 struct ata_port *ap = ata_shost_to_port(sdev->host);
d6f26d1f
TH		 519 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
520 struct ata_eh_info *ehi = &ap->eh_info;
521 unsigned long flags;
522 unsigned int action;
523
524 if (!dev)
525 goto out;
526
527 spin_lock_irqsave(ap->lock, flags);
528
529 /* if @sdev is already detached, nothing to do */
530 if (sdev->sdev_state == SDEV_OFFLINE ||
531 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
532 goto out_unlock;
533
534 /* request resume */
535 action = ATA_EH_RESUME;
536 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
537 __ata_ehi_hotplugged(ehi);
538 else
539 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
540 ehi->dev_action[dev->devno] |= action;
541
542 /* We don't want autopsy and verbose EH messages. Disable
543 * those if we're the only device on this link.
544 */
545 if (ata_port_max_devices(ap) == 1)
546 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
547
548 ata_port_schedule_eh(ap);
549
550 out_unlock:
551 spin_unlock_irqrestore(ap->lock, flags);
552 out:
553 sdev->sdev_gendev.power.power_state = PMSG_ON;
554 return 0;
9b847548
JA		 555}
556
1da177e4
LT		 557/**
558 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 559 * @id: ATA device number
1da177e4 560 * @drv_stat: value contained in ATA status register
b095518e
JG		 561 * @drv_err: value contained in ATA error register
562 * @sk: the sense key we'll fill out
563 * @asc: the additional sense code we'll fill out
564 * @ascq: the additional sense code qualifier we'll fill out
246619da 565 * @verbose: be verbose
1da177e4 566 *
b095518e
JG		 567 * Converts an ATA error into a SCSI error. Fill out pointers to
568 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
569 * format sense blocks.
1da177e4
LT		 570 *
571 * LOCKING:
cca3974e 572 * spin_lock_irqsave(host lock)
1da177e4 573 */
2e9edbf8 574void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
246619da 575 u8 *ascq, int verbose)
1da177e4 576{
b095518e 577 int i;
ffe75ef6 578
1da177e4 579 /* Based on the 3ware driver translation table */
98ac62de 580 static const unsigned char sense_table[][4] = {
1da177e4
LT		 581 /* BBD|ECC|ID|MAR */
582 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
583 /* BBD|ECC|ID */
584 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
585 /* ECC|MC|MARK */
586 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
587 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
588 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
589 /* MC|ID|ABRT|TRK0|MARK */
590 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
591 /* MCR|MARK */
592 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
593 /* Bad address mark */
594 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
595 /* TRK0 */
596 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
597 /* Abort & !ICRC */
598 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
599 /* Media change request */
600 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
601 /* SRV */
602 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
603 /* Media change */
604 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
605 /* ECC */
606 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
607 /* BBD - block marked bad */
608 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
609 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
610 };
98ac62de 611 static const unsigned char stat_table[][4] = {
1da177e4
LT		 612 /* Must be first because BUSY means no other bits valid */
613 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
614 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
615 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
616 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
617 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
618 };
1da177e4 619
1da177e4
LT		 620 /*
621 * Is this an error we can process/parse
622 */
b095518e
JG		 623 if (drv_stat & ATA_BUSY) {
624 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 625 }
b095518e
JG		 626
627 if (drv_err) {
628 /* Look for drv_err */
629 for (i = 0; sense_table[i][0] != 0xFF; i++) {
630 /* Look for best matches first */
2e9edbf8 631 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 632 sense_table[i][0]) {
633 *sk = sense_table[i][1];
634 *asc = sense_table[i][2];
635 *ascq = sense_table[i][3];
636 goto translate_done;
637 }
638 }
639 /* No immediate match */
246619da
TH		 640 if (verbose)
641 printk(KERN_WARNING "ata%u: no sense translation for "
642 "error 0x%02x\n", id, drv_err);
1da177e4 643 }
b095518e
JG		 644
645 /* Fall back to interpreting status bits */
646 for (i = 0; stat_table[i][0] != 0xFF; i++) {
647 if (stat_table[i][0] & drv_stat) {
648 *sk = stat_table[i][1];
649 *asc = stat_table[i][2];
650 *ascq = stat_table[i][3];
651 goto translate_done;
1da177e4 652 }
b095518e
JG		 653 }
654 /* No error? Undecoded? */
246619da
TH		 655 if (verbose)
656 printk(KERN_WARNING "ata%u: no sense translation for "
657 "status: 0x%02x\n", id, drv_stat);
b095518e 658
2d202024
AC		 659 /* We need a sensible error return here, which is tricky, and one
660 that won't cause people to do things like return a disk wrongly */
661 *sk = ABORTED_COMMAND;
662 *asc = 0x00;
663 *ascq = 0x00;
b095518e
JG		 664
665 translate_done:
246619da
TH		 666 if (verbose)
667 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
668 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
669 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 670 return;
671}
672
673/*
674 * ata_gen_ata_desc_sense - Generate check condition sense block.
675 * @qc: Command that completed.
676 *
677 * This function is specific to the ATA descriptor format sense
678 * block specified for the ATA pass through commands. Regardless
679 * of whether the command errored or not, return a sense
680 * block. Copy all controller registers into the sense
681 * block. Clear sense key, ASC & ASCQ if there is no error.
682 *
683 * LOCKING:
cca3974e 684 * spin_lock_irqsave(host lock)
b095518e
JG		 685 */
686void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
687{
688 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 689 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 690 unsigned char *sb = cmd->sense_buffer;
691 unsigned char *desc = sb + 8;
246619da 692 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 693
694 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
695
0e5dec47 696 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 697
b095518e
JG		 698 /*
699 * Use ata_to_sense_error() to map status register bits
700 * onto sense key, asc & ascq.
701 */
058e55e1
TH		 702 if (qc->err_mask ||
703 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 704 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 705 &sb[1], &sb[2], &sb[3], verbose);
b095518e 706 sb[1] &= 0x0f;
1da177e4
LT		 707 }
708
b095518e
JG		 709 /*
710 * Sense data is current and format is descriptor.
711 */
712 sb[0] = 0x72;
1da177e4 713
b095518e
JG		 714 desc[0] = 0x09;
715
716 /*
717 * Set length of additional sense data.
718 * Since we only populate descriptor 0, the total
719 * length is the same (fixed) length as descriptor 0.
720 */
721 desc[1] = sb[7] = 14;
722
723 /*
724 * Copy registers into sense buffer.
725 */
726 desc[2] = 0x00;
727 desc[3] = tf->feature; /* == error reg */
728 desc[5] = tf->nsect;
729 desc[7] = tf->lbal;
730 desc[9] = tf->lbam;
731 desc[11] = tf->lbah;
732 desc[12] = tf->device;
733 desc[13] = tf->command; /* == status reg */
734
735 /*
736 * Fill in Extend bit, and the high order bytes
737 * if applicable.
738 */
739 if (tf->flags & ATA_TFLAG_LBA48) {
740 desc[2] |= 0x01;
741 desc[4] = tf->hob_nsect;
742 desc[6] = tf->hob_lbal;
743 desc[8] = tf->hob_lbam;
744 desc[10] = tf->hob_lbah;
1da177e4 745 }
b095518e 746}
1da177e4 747
b095518e
JG		 748/**
749 * ata_gen_fixed_sense - generate a SCSI fixed sense block
750 * @qc: Command that we are erroring out
751 *
752 * Leverage ata_to_sense_error() to give us the codes. Fit our
753 * LBA in here if there's room.
754 *
755 * LOCKING:
756 * inherited from caller
757 */
758void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
759{
760 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 761 struct ata_taskfile *tf = &qc->result_tf;
b095518e 762 unsigned char *sb = cmd->sense_buffer;
246619da 763 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 764
765 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
766
0e5dec47 767 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 768
b095518e
JG		 769 /*
770 * Use ata_to_sense_error() to map status register bits
771 * onto sense key, asc & ascq.
772 */
058e55e1
TH		 773 if (qc->err_mask ||
774 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 775 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 776 &sb[2], &sb[12], &sb[13], verbose);
b095518e 777 sb[2] &= 0x0f;
1da177e4 778 }
1da177e4
LT		 779
780 sb[0] = 0x70;
b095518e 781 sb[7] = 0x0a;
0274aa25 782
a7dac447
JG		 783 if (tf->flags & ATA_TFLAG_LBA48) {
784 /* TODO: find solution for LBA48 descriptors */
785 }
786
787 else if (tf->flags & ATA_TFLAG_LBA) {
b095518e
JG		 788 /* A small (28b) LBA will fit in the 32b info field */
789 sb[0] |= 0x80; /* set valid bit */
790 sb[3] = tf->device & 0x0f;
791 sb[4] = tf->lbah;
792 sb[5] = tf->lbam;
793 sb[6] = tf->lbal;
1da177e4 794 }
a7dac447
JG		 795
796 else {
797 /* TODO: C/H/S */
798 }
1da177e4
LT		 799}
800
a6cce2a7
BK		 801static void ata_scsi_sdev_config(struct scsi_device *sdev)
802{
803 sdev->use_10_for_rw = 1;
804 sdev->use_10_for_ms = 1;
805}
806
807static void ata_scsi_dev_config(struct scsi_device *sdev,
808 struct ata_device *dev)
809{
914ed354
TH		 810 /* configure max sectors */
811 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 812
914ed354 813 /* SATA DMA transfers must be multiples of 4 byte, so
a6cce2a7
BK		 814 * we need to pad ATAPI transfers using an extra sg.
815 * Decrement max hw segments accordingly.
816 */
817 if (dev->class == ATA_DEV_ATAPI) {
818 request_queue_t *q = sdev->request_queue;
819 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
820 }
a6e6ce8e
TH		 821
822 if (dev->flags & ATA_DFLAG_NCQ) {
823 int depth;
824
825 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
826 depth = min(ATA_MAX_QUEUE - 1, depth);
827 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
828 }
a6cce2a7
BK		 829}
830
1da177e4
LT		 831/**
832 * ata_scsi_slave_config - Set SCSI device attributes
833 * @sdev: SCSI device to examine
834 *
835 * This is called before we actually start reading
836 * and writing to the device, to configure certain
837 * SCSI mid-layer behaviors.
838 *
839 * LOCKING:
840 * Defined by SCSI layer. We don't really care.
841 */
842
843int ata_scsi_slave_config(struct scsi_device *sdev)
844{
31534363
TH		 845 struct ata_port *ap = ata_shost_to_port(sdev->host);
846 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
847
a6cce2a7 848 ata_scsi_sdev_config(sdev);
1da177e4
LT		 849
850 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
851
31534363 852 if (dev)
a6cce2a7 853 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 854
855 return 0; /* scsi layer doesn't check return value, sigh */
856}
857
83c47bcb
TH		 858/**
859 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
860 * @sdev: SCSI device to be destroyed
861 *
862 * @sdev is about to be destroyed for hot/warm unplugging. If
863 * this unplugging was initiated by libata as indicated by NULL
864 * dev->sdev, this function doesn't have to do anything.
865 * Otherwise, SCSI layer initiated warm-unplug is in progress.
866 * Clear dev->sdev, schedule the device for ATA detach and invoke
867 * EH.
868 *
869 * LOCKING:
870 * Defined by SCSI layer. We don't really care.
871 */
872void ata_scsi_slave_destroy(struct scsi_device *sdev)
873{
874 struct ata_port *ap = ata_shost_to_port(sdev->host);
875 unsigned long flags;
876 struct ata_device *dev;
877
878 if (!ap->ops->error_handler)
879 return;
880
ba6a1308 881 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 882 dev = __ata_scsi_find_dev(ap, sdev);
883 if (dev && dev->sdev) {
884 /* SCSI device already in CANCEL state, no need to offline it */
885 dev->sdev = NULL;
886 dev->flags |= ATA_DFLAG_DETACH;
887 ata_port_schedule_eh(ap);
888 }
ba6a1308 889 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 890}
891
a6e6ce8e
TH		 892/**
893 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
894 * @sdev: SCSI device to configure queue depth for
895 * @queue_depth: new queue depth
896 *
897 * This is libata standard hostt->change_queue_depth callback.
898 * SCSI will call into this callback when user tries to set queue
899 * depth via sysfs.
900 *
901 * LOCKING:
902 * SCSI layer (we don't care)
903 *
904 * RETURNS:
905 * Newly configured queue depth.
906 */
907int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
908{
909 struct ata_port *ap = ata_shost_to_port(sdev->host);
910 struct ata_device *dev;
360f654e 911 unsigned long flags;
a6e6ce8e
TH		 912 int max_depth;
913
914 if (queue_depth < 1)
915 return sdev->queue_depth;
916
917 dev = ata_scsi_find_dev(ap, sdev);
918 if (!dev || !ata_dev_enabled(dev))
919 return sdev->queue_depth;
920
921 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
922 max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
923 if (queue_depth > max_depth)
924 queue_depth = max_depth;
925
926 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
360f654e
TH		 927
928 spin_lock_irqsave(ap->lock, flags);
929 if (queue_depth > 1)
930 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
931 else
932 dev->flags |= ATA_DFLAG_NCQ_OFF;
933 spin_unlock_irqrestore(ap->lock, flags);
934
a6e6ce8e
TH		 935 return queue_depth;
936}
937
972dcafb
DG		 938/**
939 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
940 * @qc: Storage for translated ATA taskfile
941 * @scsicmd: SCSI command to translate
942 *
943 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
944 * (to start). Perhaps these commands should be preceded by
945 * CHECK POWER MODE to see what power mode the device is already in.
946 * [See SAT revision 5 at www.t10.org]
947 *
948 * LOCKING:
cca3974e 949 * spin_lock_irqsave(host lock)
972dcafb
DG		 950 *
951 * RETURNS:
952 * Zero on success, non-zero on error.
953 */
954
955static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
057ace5e 956 const u8 *scsicmd)
972dcafb
DG		 957{
958 struct ata_taskfile *tf = &qc->tf;
959
960 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
961 tf->protocol = ATA_PROT_NODATA;
962 if (scsicmd[1] & 0x1) {
963 ; /* ignore IMMED bit, violates sat-r05 */
964 }
965 if (scsicmd[4] & 0x2)
ae006510 966 goto invalid_fld; /* LOEJ bit set not supported */
972dcafb 967 if (((scsicmd[4] >> 4) & 0xf) != 0)
ae006510 968 goto invalid_fld; /* power conditions not supported */
972dcafb
DG		 969 if (scsicmd[4] & 0x1) {
970 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 971
972 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 973 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 974
975 tf->lbah = 0x0;
976 tf->lbam = 0x0;
977 tf->lbal = 0x0;
978 tf->device |= ATA_LBA;
979 } else {
980 /* CHS */
981 tf->lbal = 0x1; /* sect */
982 tf->lbam = 0x0; /* cyl low */
983 tf->lbah = 0x0; /* cyl high */
984 }
985
972dcafb
DG		 986 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
987 } else {
988 tf->nsect = 0; /* time period value (0 implies now) */
989 tf->command = ATA_CMD_STANDBY;
990 /* Consider: ATA STANDBY IMMEDIATE command */
991 }
992 /*
993 * Standby and Idle condition timers could be implemented but that
994 * would require libata to implement the Power condition mode page
995 * and allow the user to change it. Changing mode pages requires
996 * MODE SELECT to be implemented.
997 */
998
999 return 0;
ae006510
DG		 1000
1001invalid_fld:
1002 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1003 /* "Invalid field in cbd" */
1004 return 1;
972dcafb
DG		 1005}
1006
1007
1da177e4
LT		 1008/**
1009 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1010 * @qc: Storage for translated ATA taskfile
1011 * @scsicmd: SCSI command to translate (ignored)
1012 *
1013 * Sets up an ATA taskfile to issue FLUSH CACHE or
1014 * FLUSH CACHE EXT.
1015 *
1016 * LOCKING:
cca3974e 1017 * spin_lock_irqsave(host lock)
1da177e4
LT		 1018 *
1019 * RETURNS:
1020 * Zero on success, non-zero on error.
1021 */
1022
057ace5e 1023static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1024{
1025 struct ata_taskfile *tf = &qc->tf;
1026
1027 tf->flags |= ATA_TFLAG_DEVICE;
1028 tf->protocol = ATA_PROT_NODATA;
1029
07506697 1030 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
1da177e4
LT		 1031 (ata_id_has_flush_ext(qc->dev->id)))
1032 tf->command = ATA_CMD_FLUSH_EXT;
1033 else
1034 tf->command = ATA_CMD_FLUSH;
1035
1036 return 0;
1037}
1038
3aef5231
AL		 1039/**
1040 * scsi_6_lba_len - Get LBA and transfer length
1041 * @scsicmd: SCSI command to translate
1042 *
1043 * Calculate LBA and transfer length for 6-byte commands.
1044 *
1045 * RETURNS:
1046 * @plba: the LBA
1047 * @plen: the transfer length
1048 */
1049
057ace5e 1050static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1051{
1052 u64 lba = 0;
1053 u32 len = 0;
1054
1055 VPRINTK("six-byte command\n");
1056
1057 lba |= ((u64)scsicmd[2]) << 8;
1058 lba |= ((u64)scsicmd[3]);
1059
1060 len |= ((u32)scsicmd[4]);
1061
1062 *plba = lba;
1063 *plen = len;
1064}
1065
1066/**
1067 * scsi_10_lba_len - Get LBA and transfer length
1068 * @scsicmd: SCSI command to translate
1069 *
1070 * Calculate LBA and transfer length for 10-byte commands.
1071 *
1072 * RETURNS:
1073 * @plba: the LBA
1074 * @plen: the transfer length
1075 */
1076
057ace5e 1077static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1078{
1079 u64 lba = 0;
1080 u32 len = 0;
1081
1082 VPRINTK("ten-byte command\n");
1083
1084 lba |= ((u64)scsicmd[2]) << 24;
1085 lba |= ((u64)scsicmd[3]) << 16;
1086 lba |= ((u64)scsicmd[4]) << 8;
1087 lba |= ((u64)scsicmd[5]);
1088
1089 len |= ((u32)scsicmd[7]) << 8;
1090 len |= ((u32)scsicmd[8]);
1091
1092 *plba = lba;
1093 *plen = len;
1094}
1095
1096/**
1097 * scsi_16_lba_len - Get LBA and transfer length
1098 * @scsicmd: SCSI command to translate
1099 *
1100 * Calculate LBA and transfer length for 16-byte commands.
1101 *
1102 * RETURNS:
1103 * @plba: the LBA
1104 * @plen: the transfer length
1105 */
1106
057ace5e 1107static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1108{
1109 u64 lba = 0;
1110 u32 len = 0;
1111
1112 VPRINTK("sixteen-byte command\n");
1113
1114 lba |= ((u64)scsicmd[2]) << 56;
1115 lba |= ((u64)scsicmd[3]) << 48;
1116 lba |= ((u64)scsicmd[4]) << 40;
1117 lba |= ((u64)scsicmd[5]) << 32;
1118 lba |= ((u64)scsicmd[6]) << 24;
1119 lba |= ((u64)scsicmd[7]) << 16;
1120 lba |= ((u64)scsicmd[8]) << 8;
1121 lba |= ((u64)scsicmd[9]);
1122
1123 len |= ((u32)scsicmd[10]) << 24;
1124 len |= ((u32)scsicmd[11]) << 16;
1125 len |= ((u32)scsicmd[12]) << 8;
1126 len |= ((u32)scsicmd[13]);
1127
1128 *plba = lba;
1129 *plen = len;
1130}
1131
1da177e4
LT		 1132/**
1133 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1134 * @qc: Storage for translated ATA taskfile
1135 * @scsicmd: SCSI command to translate
1136 *
1137 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1138 *
1139 * LOCKING:
cca3974e 1140 * spin_lock_irqsave(host lock)
1da177e4
LT		 1141 *
1142 * RETURNS:
1143 * Zero on success, non-zero on error.
1144 */
1145
057ace5e 1146static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1147{
1148 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1149 struct ata_device *dev = qc->dev;
1da177e4 1150 u64 dev_sectors = qc->dev->n_sectors;
3aef5231
AL		 1151 u64 block;
1152 u32 n_block;
1da177e4
LT		 1153
1154 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1155 tf->protocol = ATA_PROT_NODATA;
1da177e4 1156
3aef5231
AL		 1157 if (scsicmd[0] == VERIFY)
1158 scsi_10_lba_len(scsicmd, &block, &n_block);
1159 else if (scsicmd[0] == VERIFY_16)
1160 scsi_16_lba_len(scsicmd, &block, &n_block);
1da177e4 1161 else
ae006510 1162 goto invalid_fld;
1da177e4 1163
8bf62ece 1164 if (!n_block)
ae006510 1165 goto nothing_to_do;
8bf62ece 1166 if (block >= dev_sectors)
ae006510 1167 goto out_of_range;
8bf62ece 1168 if ((block + n_block) > dev_sectors)
ae006510 1169 goto out_of_range;
1da177e4 1170
07506697
AL		 1171 if (dev->flags & ATA_DFLAG_LBA) {
1172 tf->flags |= ATA_TFLAG_LBA;
1173
c6a33e24
AL		 1174 if (lba_28_ok(block, n_block)) {
1175 /* use LBA28 */
1176 tf->command = ATA_CMD_VERIFY;
1177 tf->device |= (block >> 24) & 0xf;
1178 } else if (lba_48_ok(block, n_block)) {
1179 if (!(dev->flags & ATA_DFLAG_LBA48))
1180 goto out_of_range;
07506697
AL		 1181
1182 /* use LBA48 */
1183 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1184 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1185
8bf62ece 1186 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1187
8bf62ece
AL		 1188 tf->hob_lbah = (block >> 40) & 0xff;
1189 tf->hob_lbam = (block >> 32) & 0xff;
1190 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1191 } else
1192 /* request too large even for LBA48 */
1193 goto out_of_range;
8bf62ece
AL		 1194
1195 tf->nsect = n_block & 0xff;
1da177e4 1196
8bf62ece
AL		 1197 tf->lbah = (block >> 16) & 0xff;
1198 tf->lbam = (block >> 8) & 0xff;
1199 tf->lbal = block & 0xff;
1da177e4 1200
8bf62ece
AL		 1201 tf->device |= ATA_LBA;
1202 } else {
1203 /* CHS */
1204 u32 sect, head, cyl, track;
1205
c6a33e24
AL		 1206 if (!lba_28_ok(block, n_block))
1207 goto out_of_range;
07506697 1208
8bf62ece
AL		 1209 /* Convert LBA to CHS */
1210 track = (u32)block / dev->sectors;
1211 cyl = track / dev->heads;
1212 head = track % dev->heads;
1213 sect = (u32)block % dev->sectors + 1;
1214
c187c4b5
AL		 1215 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1216 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1217
1218 /* Check whether the converted CHS can fit.
1219 Cylinder: 0-65535
8bf62ece
AL		 1220 Head: 0-15
1221 Sector: 1-255*/
2e9edbf8 1222 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1223 goto out_of_range;
2e9edbf8 1224
8bf62ece
AL		 1225 tf->command = ATA_CMD_VERIFY;
1226 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1227 tf->lbal = sect;
1228 tf->lbam = cyl;
1229 tf->lbah = cyl >> 8;
1230 tf->device |= head;
1231 }
1da177e4
LT		 1232
1233 return 0;
ae006510
DG		 1234
1235invalid_fld:
1236 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1237 /* "Invalid field in cbd" */
1238 return 1;
1239
1240out_of_range:
1241 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1242 /* "Logical Block Address out of range" */
1243 return 1;
1244
1245nothing_to_do:
1246 qc->scsicmd->result = SAM_STAT_GOOD;
1247 return 1;
1da177e4
LT		 1248}
1249
1250/**
1251 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1252 * @qc: Storage for translated ATA taskfile
1253 * @scsicmd: SCSI command to translate
1254 *
1255 * Converts any of six SCSI read/write commands into the
1256 * ATA counterpart, including starting sector (LBA),
1257 * sector count, and taking into account the device's LBA48
1258 * support.
1259 *
1260 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1261 * %WRITE_16 are currently supported.
1262 *
1263 * LOCKING:
cca3974e 1264 * spin_lock_irqsave(host lock)
1da177e4
LT		 1265 *
1266 * RETURNS:
1267 * Zero on success, non-zero on error.
1268 */
1269
057ace5e 1270static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1271{
1272 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1273 struct ata_device *dev = qc->dev;
3aef5231
AL		 1274 u64 block;
1275 u32 n_block;
1da177e4 1276
27197367 1277 qc->flags |= ATA_QCFLAG_IO;
1da177e4 1278 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1da177e4 1279
8cbd6df1
AL		 1280 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1281 scsicmd[0] == WRITE_16)
1da177e4 1282 tf->flags |= ATA_TFLAG_WRITE;
1da177e4 1283
9a3dccc4 1284 /* Calculate the SCSI LBA, transfer length and FUA. */
3aef5231
AL		 1285 switch (scsicmd[0]) {
1286 case READ_10:
1287 case WRITE_10:
1288 scsi_10_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1289 if (unlikely(scsicmd[1] & (1 << 3)))
1290 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1291 break;
1292 case READ_6:
1293 case WRITE_6:
1294 scsi_6_lba_len(scsicmd, &block, &n_block);
c187c4b5
AL		 1295
1296 /* for 6-byte r/w commands, transfer length 0
1297 * means 256 blocks of data, not 0 block.
1298 */
76b2bf9b
JG		 1299 if (!n_block)
1300 n_block = 256;
3aef5231
AL		 1301 break;
1302 case READ_16:
1303 case WRITE_16:
1304 scsi_16_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1305 if (unlikely(scsicmd[1] & (1 << 3)))
1306 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1307 break;
1308 default:
8bf62ece 1309 DPRINTK("no-byte command\n");
ae006510 1310 goto invalid_fld;
1da177e4
LT		 1311 }
1312
8bf62ece
AL		 1313 /* Check and compose ATA command */
1314 if (!n_block)
c187c4b5
AL		 1315 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1316 * length 0 means transfer 0 block of data.
1317 * However, for ATA R/W commands, sector count 0 means
1318 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1319 *
1320 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1321 */
ae006510 1322 goto nothing_to_do;
1da177e4 1323
360f654e
TH		 1324 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1325 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
3dc1d881
TH		 1326 /* yay, NCQ */
1327 if (!lba_48_ok(block, n_block))
1328 goto out_of_range;
1329
1330 tf->protocol = ATA_PROT_NCQ;
1331 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1332
1333 if (tf->flags & ATA_TFLAG_WRITE)
1334 tf->command = ATA_CMD_FPDMA_WRITE;
1335 else
1336 tf->command = ATA_CMD_FPDMA_READ;
1337
1338 qc->nsect = n_block;
1339
1340 tf->nsect = qc->tag << 3;
1341 tf->hob_feature = (n_block >> 8) & 0xff;
1342 tf->feature = n_block & 0xff;
1343
1344 tf->hob_lbah = (block >> 40) & 0xff;
1345 tf->hob_lbam = (block >> 32) & 0xff;
1346 tf->hob_lbal = (block >> 24) & 0xff;
1347 tf->lbah = (block >> 16) & 0xff;
1348 tf->lbam = (block >> 8) & 0xff;
1349 tf->lbal = block & 0xff;
1350
1351 tf->device = 1 << 6;
1352 if (tf->flags & ATA_TFLAG_FUA)
1353 tf->device |= 1 << 7;
1354 } else if (dev->flags & ATA_DFLAG_LBA) {
07506697
AL		 1355 tf->flags |= ATA_TFLAG_LBA;
1356
c6a33e24
AL		 1357 if (lba_28_ok(block, n_block)) {
1358 /* use LBA28 */
1359 tf->device |= (block >> 24) & 0xf;
1360 } else if (lba_48_ok(block, n_block)) {
1361 if (!(dev->flags & ATA_DFLAG_LBA48))
ae006510 1362 goto out_of_range;
1da177e4 1363
07506697
AL		 1364 /* use LBA48 */
1365 tf->flags |= ATA_TFLAG_LBA48;
1366
8bf62ece
AL		 1367 tf->hob_nsect = (n_block >> 8) & 0xff;
1368
1369 tf->hob_lbah = (block >> 40) & 0xff;
1370 tf->hob_lbam = (block >> 32) & 0xff;
1371 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1372 } else
1373 /* request too large even for LBA48 */
1374 goto out_of_range;
c187c4b5 1375
9a3dccc4
TH		 1376 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1377 goto invalid_fld;
8cbd6df1 1378
8bf62ece
AL		 1379 qc->nsect = n_block;
1380 tf->nsect = n_block & 0xff;
1da177e4 1381
8bf62ece
AL		 1382 tf->lbah = (block >> 16) & 0xff;
1383 tf->lbam = (block >> 8) & 0xff;
1384 tf->lbal = block & 0xff;
1da177e4 1385
8bf62ece 1386 tf->device |= ATA_LBA;
2e9edbf8 1387 } else {
8bf62ece
AL		 1388 /* CHS */
1389 u32 sect, head, cyl, track;
1390
1391 /* The request -may- be too large for CHS addressing. */
c6a33e24 1392 if (!lba_28_ok(block, n_block))
ae006510 1393 goto out_of_range;
c187c4b5 1394
9a3dccc4
TH		 1395 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1396 goto invalid_fld;
8cbd6df1 1397
8bf62ece
AL		 1398 /* Convert LBA to CHS */
1399 track = (u32)block / dev->sectors;
1400 cyl = track / dev->heads;
1401 head = track % dev->heads;
1402 sect = (u32)block % dev->sectors + 1;
1403
c187c4b5 1404 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
8bf62ece 1405 (u32)block, track, cyl, head, sect);
c187c4b5 1406
2e9edbf8
JG		 1407 /* Check whether the converted CHS can fit.
1408 Cylinder: 0-65535
8bf62ece
AL		 1409 Head: 0-15
1410 Sector: 1-255*/
c187c4b5 1411 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1412 goto out_of_range;
c187c4b5 1413
8bf62ece
AL		 1414 qc->nsect = n_block;
1415 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1416 tf->lbal = sect;
1417 tf->lbam = cyl;
1418 tf->lbah = cyl >> 8;
1419 tf->device |= head;
1da177e4
LT		 1420 }
1421
8bf62ece 1422 return 0;
ae006510
DG		 1423
1424invalid_fld:
1425 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1426 /* "Invalid field in cbd" */
1427 return 1;
1428
1429out_of_range:
1430 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1431 /* "Logical Block Address out of range" */
1432 return 1;
1433
1434nothing_to_do:
1435 qc->scsicmd->result = SAM_STAT_GOOD;
1436 return 1;
1da177e4
LT		 1437}
1438
77853bf2 1439static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1440{
c31f571d 1441 struct ata_port *ap = qc->ap;
1da177e4 1442 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1443 u8 *cdb = cmd->cmnd;
a22e2eb0 1444 int need_sense = (qc->err_mask != 0);
b095518e 1445
3057ac3c 1446 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1447 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1448 * cache
1449 */
c31f571d
TH		 1450 if (ap->ops->error_handler &&
1451 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
3057ac3c 1452 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1453 (qc->tf.feature == SETFEATURES_WC_OFF))) {
c31f571d
TH		 1454 ap->eh_info.action |= ATA_EH_REVALIDATE;
1455 ata_port_schedule_eh(ap);
3057ac3c 1456 }
1457
b095518e
JG		 1458 /* For ATA pass thru (SAT) commands, generate a sense block if
1459 * user mandated it or if there's an error. Note that if we
1460 * generate because the user forced us to, a check condition
1461 * is generated and the ATA register values are returned
1462 * whether the command completed successfully or not. If there
1463 * was no error, SK, ASC and ASCQ will all be zero.
1464 */
a7dac447
JG		 1465 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1466 ((cdb[2] & 0x20) || need_sense)) {
b095518e
JG		 1467 ata_gen_ata_desc_sense(qc);
1468 } else {
1469 if (!need_sense) {
1470 cmd->result = SAM_STAT_GOOD;
1471 } else {
1472 /* TODO: decide which descriptor format to use
1473 * for 48b LBA devices and call that here
1474 * instead of the fixed desc, which is only
1475 * good for smaller LBA (and maybe CHS?)
1476 * devices.
1477 */
1478 ata_gen_fixed_sense(qc);
1479 }
1480 }
1da177e4 1481
c31f571d
TH		 1482 if (need_sense && !ap->ops->error_handler)
1483 ata_dump_status(ap->id, &qc->result_tf);
1da177e4
LT		 1484
1485 qc->scsidone(cmd);
1486
77853bf2 1487 ata_qc_free(qc);
1da177e4
LT		 1488}
1489
3dc1d881
TH		 1490/**
1491 * ata_scmd_need_defer - Check whether we need to defer scmd
1492 * @dev: ATA device to which the command is addressed
1493 * @is_io: Is the command IO (and thus possibly NCQ)?
1494 *
1495 * NCQ and non-NCQ commands cannot run together. As upper layer
1496 * only knows the queue depth, we are responsible for maintaining
1497 * exclusion. This function checks whether a new command can be
1498 * issued to @dev.
1499 *
1500 * LOCKING:
cca3974e 1501 * spin_lock_irqsave(host lock)
3dc1d881
TH		 1502 *
1503 * RETURNS:
1504 * 1 if deferring is needed, 0 otherwise.
1505 */
1506static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1507{
1508 struct ata_port *ap = dev->ap;
1509
1510 if (!(dev->flags & ATA_DFLAG_NCQ))
1511 return 0;
1512
1513 if (is_io) {
1514 if (!ata_tag_valid(ap->active_tag))
1515 return 0;
1516 } else {
1517 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1518 return 0;
1519 }
1520 return 1;
1521}
1522
1da177e4
LT		 1523/**
1524 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1525 * @dev: ATA device to which the command is addressed
1526 * @cmd: SCSI command to execute
1527 * @done: SCSI command completion function
1528 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1529 *
1530 * Our ->queuecommand() function has decided that the SCSI
1531 * command issued can be directly translated into an ATA
1532 * command, rather than handled internally.
1533 *
1534 * This function sets up an ata_queued_cmd structure for the
1535 * SCSI command, and sends that ata_queued_cmd to the hardware.
1536 *
ae006510
DG		 1537 * The xlat_func argument (actor) returns 0 if ready to execute
1538 * ATA command, else 1 to finish translation. If 1 is returned
1539 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1540 * to be set reflecting an error condition or clean (early)
1541 * termination.
1542 *
1da177e4 1543 * LOCKING:
cca3974e 1544 * spin_lock_irqsave(host lock)
2115ea94
TH		 1545 *
1546 * RETURNS:
1547 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1548 * needs to be deferred.
1da177e4 1549 */
2115ea94
TH		 1550static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1551 void (*done)(struct scsi_cmnd *),
1552 ata_xlat_func_t xlat_func)
1da177e4
LT		 1553{
1554 struct ata_queued_cmd *qc;
1555 u8 *scsicmd = cmd->cmnd;
3dc1d881 1556 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1557
1558 VPRINTK("ENTER\n");
1559
3dc1d881
TH		 1560 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1561 goto defer;
1562
3373efd8 1563 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1564 if (!qc)
ae006510 1565 goto err_mem;
1da177e4
LT		 1566
1567 /* data is present; dma-map it */
be7db055
CH		 1568 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1569 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1570 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1571 ata_dev_printk(dev, KERN_WARNING,
1572 "WARNING: zero len r/w req\n");
ae006510 1573 goto err_did;
1da177e4
LT		 1574 }
1575
1576 if (cmd->use_sg)
1577 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1578 else
1579 ata_sg_init_one(qc, cmd->request_buffer,
1580 cmd->request_bufflen);
1581
1582 qc->dma_dir = cmd->sc_data_direction;
1583 }
1584
1585 qc->complete_fn = ata_scsi_qc_complete;
1586
1587 if (xlat_func(qc, scsicmd))
ae006510 1588 goto early_finish;
1da177e4
LT		 1589
1590 /* select device, send command to hardware */
8e0e694a 1591 ata_qc_issue(qc);
1da177e4
LT		 1592
1593 VPRINTK("EXIT\n");
2115ea94 1594 return 0;
1da177e4 1595
ae006510
DG		 1596early_finish:
1597 ata_qc_free(qc);
1598 done(cmd);
1599 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1600 return 0;
ae006510
DG		 1601
1602err_did:
1da177e4 1603 ata_qc_free(qc);
ae006510
DG		 1604 cmd->result = (DID_ERROR << 16);
1605 done(cmd);
253b92ec 1606err_mem:
ae006510 1607 DPRINTK("EXIT - internal\n");
2115ea94 1608 return 0;
3dc1d881
TH		 1609
1610defer:
1611 DPRINTK("EXIT - defer\n");
1612 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1613}
1614
1615/**
1616 * ata_scsi_rbuf_get - Map response buffer.
1617 * @cmd: SCSI command containing buffer to be mapped.
1618 * @buf_out: Pointer to mapped area.
1619 *
1620 * Maps buffer contained within SCSI command @cmd.
1621 *
1622 * LOCKING:
cca3974e 1623 * spin_lock_irqsave(host lock)
1da177e4
LT		 1624 *
1625 * RETURNS:
1626 * Length of response buffer.
1627 */
1628
1629static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1630{
1631 u8 *buf;
1632 unsigned int buflen;
1633
1634 if (cmd->use_sg) {
1635 struct scatterlist *sg;
1636
1637 sg = (struct scatterlist *) cmd->request_buffer;
1638 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1639 buflen = sg->length;
1640 } else {
1641 buf = cmd->request_buffer;
1642 buflen = cmd->request_bufflen;
1643 }
1644
1645 *buf_out = buf;
1646 return buflen;
1647}
1648
1649/**
1650 * ata_scsi_rbuf_put - Unmap response buffer.
1651 * @cmd: SCSI command containing buffer to be unmapped.
1652 * @buf: buffer to unmap
1653 *
1654 * Unmaps response buffer contained within @cmd.
1655 *
1656 * LOCKING:
cca3974e 1657 * spin_lock_irqsave(host lock)
1da177e4
LT		 1658 */
1659
1660static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1661{
1662 if (cmd->use_sg) {
1663 struct scatterlist *sg;
1664
1665 sg = (struct scatterlist *) cmd->request_buffer;
1666 kunmap_atomic(buf - sg->offset, KM_USER0);
1667 }
1668}
1669
1670/**
1671 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1672 * @args: device IDENTIFY data / SCSI command of interest.
1673 * @actor: Callback hook for desired SCSI command simulator
1674 *
1675 * Takes care of the hard work of simulating a SCSI command...
1676 * Mapping the response buffer, calling the command's handler,
1677 * and handling the handler's return value. This return value
1678 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1679 * completed successfully (0), or not (in which case cmd->result
1680 * and sense buffer are assumed to be set).
1da177e4
LT		 1681 *
1682 * LOCKING:
cca3974e 1683 * spin_lock_irqsave(host lock)
1da177e4
LT		 1684 */
1685
1686void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1687 unsigned int (*actor) (struct ata_scsi_args *args,
1688 u8 *rbuf, unsigned int buflen))
1689{
1690 u8 *rbuf;
1691 unsigned int buflen, rc;
1692 struct scsi_cmnd *cmd = args->cmd;
1693
1694 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1695 memset(rbuf, 0, buflen);
1696 rc = actor(args, rbuf, buflen);
1697 ata_scsi_rbuf_put(cmd, rbuf);
1698
ae006510 1699 if (rc == 0)
1da177e4 1700 cmd->result = SAM_STAT_GOOD;
ae006510 1701 args->done(cmd);
1da177e4
LT		 1702}
1703
1704/**
1705 * ata_scsiop_inq_std - Simulate INQUIRY command
1706 * @args: device IDENTIFY data / SCSI command of interest.
1707 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1708 * @buflen: Response buffer length.
1709 *
1710 * Returns standard device identification data associated
b142eb65 1711 * with non-VPD INQUIRY command output.
1da177e4
LT		 1712 *
1713 * LOCKING:
cca3974e 1714 * spin_lock_irqsave(host lock)
1da177e4
LT		 1715 */
1716
1717unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1718 unsigned int buflen)
1719{
1720 u8 hdr[] = {
1721 TYPE_DISK,
1722 0,
1723 0x5, /* claim SPC-3 version compatibility */
1724 2,
1725 95 - 4
1726 };
1727
1728 /* set scsi removeable (RMB) bit per ata bit */
1729 if (ata_id_removeable(args->id))
1730 hdr[1] |= (1 << 7);
1731
1732 VPRINTK("ENTER\n");
1733
1734 memcpy(rbuf, hdr, sizeof(hdr));
1735
1736 if (buflen > 35) {
1737 memcpy(&rbuf[8], "ATA ", 8);
6a62a04d
TH		 1738 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1739 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1da177e4
LT		 1740 if (rbuf[32] == 0 || rbuf[32] == ' ')
1741 memcpy(&rbuf[32], "n/a ", 4);
1742 }
1743
1744 if (buflen > 63) {
1745 const u8 versions[] = {
1746 0x60, /* SAM-3 (no version claimed) */
1747
1748 0x03,
1749 0x20, /* SBC-2 (no version claimed) */
1750
1751 0x02,
1752 0x60 /* SPC-3 (no version claimed) */
1753 };
1754
1755 memcpy(rbuf + 59, versions, sizeof(versions));
1756 }
1757
1758 return 0;
1759}
1760
1761/**
b142eb65 1762 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1763 * @args: device IDENTIFY data / SCSI command of interest.
1764 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1765 * @buflen: Response buffer length.
1766 *
b142eb65 1767 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1768 *
1769 * LOCKING:
cca3974e 1770 * spin_lock_irqsave(host lock)
1da177e4
LT		 1771 */
1772
1773unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1774 unsigned int buflen)
1775{
1776 const u8 pages[] = {
1777 0x00, /* page 0x00, this page */
1778 0x80, /* page 0x80, unit serial no page */
1779 0x83 /* page 0x83, device ident page */
1780 };
b142eb65 1781 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1782
1783 if (buflen > 6)
1784 memcpy(rbuf + 4, pages, sizeof(pages));
1785
1786 return 0;
1787}
1788
1789/**
b142eb65 1790 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1791 * @args: device IDENTIFY data / SCSI command of interest.
1792 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1793 * @buflen: Response buffer length.
1794 *
1795 * Returns ATA device serial number.
1796 *
1797 * LOCKING:
cca3974e 1798 * spin_lock_irqsave(host lock)
1da177e4
LT		 1799 */
1800
1801unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1802 unsigned int buflen)
1803{
1804 const u8 hdr[] = {
1805 0,
1806 0x80, /* this page code */
1807 0,
1808 ATA_SERNO_LEN, /* page len */
1809 };
1810 memcpy(rbuf, hdr, sizeof(hdr));
1811
1812 if (buflen > (ATA_SERNO_LEN + 4 - 1))
6a62a04d
TH		 1813 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1814 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1da177e4
LT		 1815
1816 return 0;
1817}
1818
1da177e4 1819/**
b142eb65 1820 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1821 * @args: device IDENTIFY data / SCSI command of interest.
1822 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1823 * @buflen: Response buffer length.
1824 *
b142eb65
JG		 1825 * Yields two logical unit device identification designators:
1826 * - vendor specific ASCII containing the ATA serial number
1827 * - SAT defined "t10 vendor id based" containing ASCII vendor
1828 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1829 *
1830 * LOCKING:
cca3974e 1831 * spin_lock_irqsave(host lock)
1da177e4
LT		 1832 */
1833
1834unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1835 unsigned int buflen)
1836{
b142eb65
JG		 1837 int num;
1838 const int sat_model_serial_desc_len = 68;
1839 const int ata_model_byte_len = 40;
1da177e4 1840
b142eb65
JG		 1841 rbuf[1] = 0x83; /* this page code */
1842 num = 4;
1843
1844 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1845 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1846 rbuf[num + 0] = 2;
b142eb65
JG		 1847 rbuf[num + 3] = ATA_SERNO_LEN;
1848 num += 4;
1849 ata_id_string(args->id, (unsigned char *) rbuf + num,
1850 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1851 num += ATA_SERNO_LEN;
1da177e4 1852 }
b142eb65
JG		 1853 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1854 /* SAT defined lu model and serial numbers descriptor */
1855 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1856 rbuf[num + 0] = 2;
1857 rbuf[num + 1] = 1;
b142eb65
JG		 1858 rbuf[num + 3] = sat_model_serial_desc_len;
1859 num += 4;
1860 memcpy(rbuf + num, "ATA ", 8);
1861 num += 8;
1862 ata_id_string(args->id, (unsigned char *) rbuf + num,
1863 ATA_ID_PROD_OFS, ata_model_byte_len);
1864 num += ata_model_byte_len;
1865 ata_id_string(args->id, (unsigned char *) rbuf + num,
1866 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1867 num += ATA_SERNO_LEN;
1868 }
1869 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1870 return 0;
1871}
1872
1873/**
0cba632b 1874 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1875 * @args: device IDENTIFY data / SCSI command of interest.
1876 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1877 * @buflen: Response buffer length.
1878 *
1879 * No operation. Simply returns success to caller, to indicate
1880 * that the caller should successfully complete this SCSI command.
1881 *
1882 * LOCKING:
cca3974e 1883 * spin_lock_irqsave(host lock)
1da177e4
LT		 1884 */
1885
1886unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1887 unsigned int buflen)
1888{
1889 VPRINTK("ENTER\n");
1890 return 0;
1891}
1892
1893/**
1894 * ata_msense_push - Push data onto MODE SENSE data output buffer
1895 * @ptr_io: (input/output) Location to store more output data
1896 * @last: End of output data buffer
1897 * @buf: Pointer to BLOB being added to output buffer
1898 * @buflen: Length of BLOB
1899 *
1900 * Store MODE SENSE data on an output buffer.
1901 *
1902 * LOCKING:
1903 * None.
1904 */
1905
1906static void ata_msense_push(u8 **ptr_io, const u8 *last,
1907 const u8 *buf, unsigned int buflen)
1908{
1909 u8 *ptr = *ptr_io;
1910
1911 if ((ptr + buflen - 1) > last)
1912 return;
1913
1914 memcpy(ptr, buf, buflen);
1915
1916 ptr += buflen;
1917
1918 *ptr_io = ptr;
1919}
1920
1921/**
1922 * ata_msense_caching - Simulate MODE SENSE caching info page
1923 * @id: device IDENTIFY data
1924 * @ptr_io: (input/output) Location to store more output data
1925 * @last: End of output data buffer
1926 *
1927 * Generate a caching info page, which conditionally indicates
1928 * write caching to the SCSI layer, depending on device
1929 * capabilities.
1930 *
1931 * LOCKING:
1932 * None.
1933 */
1934
1935static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1936 const u8 *last)
1937{
00ac37f5 1938 u8 page[CACHE_MPAGE_LEN];
1da177e4 1939
00ac37f5 1940 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1941 if (ata_id_wcache_enabled(id))
1942 page[2] |= (1 << 2); /* write cache enable */
1943 if (!ata_id_rahead_enabled(id))
1944 page[12] |= (1 << 5); /* disable read ahead */
1945
1946 ata_msense_push(ptr_io, last, page, sizeof(page));
1947 return sizeof(page);
1948}
1949
1950/**
1951 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1952 * @dev: Device associated with this MODE SENSE command
1953 * @ptr_io: (input/output) Location to store more output data
1954 * @last: End of output data buffer
1955 *
1956 * Generate a generic MODE SENSE control mode page.
1957 *
1958 * LOCKING:
1959 * None.
1960 */
1961
1962static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1963{
00ac37f5
DG		 1964 ata_msense_push(ptr_io, last, def_control_mpage,
1965 sizeof(def_control_mpage));
1966 return sizeof(def_control_mpage);
1da177e4
LT		 1967}
1968
1969/**
1970 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1971 * @dev: Device associated with this MODE SENSE command
1972 * @ptr_io: (input/output) Location to store more output data
1973 * @last: End of output data buffer
1974 *
1975 * Generate a generic MODE SENSE r/w error recovery page.
1976 *
1977 * LOCKING:
1978 * None.
1979 */
1980
1981static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1982{
1da177e4 1983
00ac37f5
DG		 1984 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1985 sizeof(def_rw_recovery_mpage));
1986 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1987}
1988
48bdc8ec
JA		 1989/*
1990 * We can turn this into a real blacklist if it's needed, for now just
1991 * blacklist any Maxtor BANC1G10 revision firmware
1992 */
1993static int ata_dev_supports_fua(u16 *id)
1994{
1995 unsigned char model[41], fw[9];
1996
c3c013a2
JG		 1997 if (!libata_fua)
1998 return 0;
48bdc8ec
JA		 1999 if (!ata_id_has_fua(id))
2000 return 0;
2001
6a62a04d
TH		 2002 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
2003 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
48bdc8ec 2004
2e02671d 2005 if (strcmp(model, "Maxtor"))
48bdc8ec 2006 return 1;
2e02671d 2007 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2008 return 1;
2009
2010 return 0; /* blacklisted */
2011}
2012
1da177e4
LT		 2013/**
2014 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2015 * @args: device IDENTIFY data / SCSI command of interest.
2016 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2017 * @buflen: Response buffer length.
2018 *
00ac37f5
DG		 2019 * Simulate MODE SENSE commands. Assume this is invoked for direct
2020 * access devices (e.g. disks) only. There should be no block
2021 * descriptor for other device types.
1da177e4
LT		 2022 *
2023 * LOCKING:
cca3974e 2024 * spin_lock_irqsave(host lock)
1da177e4
LT		 2025 */
2026
2027unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2028 unsigned int buflen)
2029{
9a3dccc4 2030 struct ata_device *dev = args->dev;
1da177e4 2031 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2032 const u8 sat_blk_desc[] = {
2033 0, 0, 0, 0, /* number of blocks: sat unspecified */
2034 0,
2035 0, 0x2, 0x0 /* block length: 512 bytes */
2036 };
2037 u8 pg, spg;
2038 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2039 u8 dpofua;
1da177e4
LT		 2040
2041 VPRINTK("ENTER\n");
2042
2043 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2044 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2045 /*
2046 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2047 */
00ac37f5 2048
1da177e4 2049 page_control = scsicmd[2] >> 6;
ae006510
DG		 2050 switch (page_control) {
2051 case 0: /* current */
2052 break; /* supported */
2053 case 3: /* saved */
2054 goto saving_not_supp;
2055 case 1: /* changeable */
2056 case 2: /* defaults */
2057 default:
2058 goto invalid_fld;
2059 }
1da177e4 2060
00ac37f5
DG		 2061 if (six_byte) {
2062 output_len = 4 + (ebd ? 8 : 0);
2063 alloc_len = scsicmd[4];
2064 } else {
2065 output_len = 8 + (ebd ? 8 : 0);
2066 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2067 }
2068 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2069
2070 p = rbuf + output_len;
00ac37f5 2071 last = rbuf + minlen - 1;
1da177e4 2072
00ac37f5
DG		 2073 pg = scsicmd[2] & 0x3f;
2074 spg = scsicmd[3];
2075 /*
2076 * No mode subpages supported (yet) but asking for _all_
2077 * subpages may be valid
2078 */
2079 if (spg && (spg != ALL_SUB_MPAGES))
2080 goto invalid_fld;
2081
2082 switch(pg) {
2083 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2084 output_len += ata_msense_rw_recovery(&p, last);
2085 break;
2086
00ac37f5 2087 case CACHE_MPAGE:
1da177e4
LT		 2088 output_len += ata_msense_caching(args->id, &p, last);
2089 break;
2090
00ac37f5 2091 case CONTROL_MPAGE: {
1da177e4
LT		 2092 output_len += ata_msense_ctl_mode(&p, last);
2093 break;
2094 }
2095
00ac37f5 2096 case ALL_MPAGES:
1da177e4
LT		 2097 output_len += ata_msense_rw_recovery(&p, last);
2098 output_len += ata_msense_caching(args->id, &p, last);
2099 output_len += ata_msense_ctl_mode(&p, last);
2100 break;
2101
2102 default: /* invalid page code */
ae006510 2103 goto invalid_fld;
1da177e4
LT		 2104 }
2105
00ac37f5
DG		 2106 if (minlen < 1)
2107 return 0;
9a3dccc4
TH		 2108
2109 dpofua = 0;
f79d409f 2110 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2111 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2112 dpofua = 1 << 4;
2113
1da177e4
LT		 2114 if (six_byte) {
2115 output_len--;
2116 rbuf[0] = output_len;
9a3dccc4
TH		 2117 if (minlen > 2)
2118 rbuf[2] |= dpofua;
00ac37f5
DG		 2119 if (ebd) {
2120 if (minlen > 3)
2121 rbuf[3] = sizeof(sat_blk_desc);
2122 if (minlen > 11)
2123 memcpy(rbuf + 4, sat_blk_desc,
2124 sizeof(sat_blk_desc));
2125 }
1da177e4
LT		 2126 } else {
2127 output_len -= 2;
2128 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2129 if (minlen > 1)
2130 rbuf[1] = output_len;
9a3dccc4
TH		 2131 if (minlen > 3)
2132 rbuf[3] |= dpofua;
00ac37f5
DG		 2133 if (ebd) {
2134 if (minlen > 7)
2135 rbuf[7] = sizeof(sat_blk_desc);
2136 if (minlen > 15)
2137 memcpy(rbuf + 8, sat_blk_desc,
2138 sizeof(sat_blk_desc));
2139 }
1da177e4 2140 }
1da177e4 2141 return 0;
ae006510
DG		 2142
2143invalid_fld:
2144 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2145 /* "Invalid field in cbd" */
2146 return 1;
2147
2148saving_not_supp:
2149 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2150 /* "Saving parameters not supported" */
2151 return 1;
1da177e4
LT		 2152}
2153
2154/**
2155 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2156 * @args: device IDENTIFY data / SCSI command of interest.
2157 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2158 * @buflen: Response buffer length.
2159 *
2160 * Simulate READ CAPACITY commands.
2161 *
2162 * LOCKING:
cca3974e 2163 * spin_lock_irqsave(host lock)
1da177e4
LT		 2164 */
2165
2166unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2167 unsigned int buflen)
2168{
2169 u64 n_sectors;
2170 u32 tmp;
2171
2172 VPRINTK("ENTER\n");
2173
8bf62ece
AL		 2174 if (ata_id_has_lba(args->id)) {
2175 if (ata_id_has_lba48(args->id))
2176 n_sectors = ata_id_u64(args->id, 100);
2177 else
2178 n_sectors = ata_id_u32(args->id, 60);
2179 } else {
2180 /* CHS default translation */
2181 n_sectors = args->id[1] * args->id[3] * args->id[6];
2182
2183 if (ata_id_current_chs_valid(args->id))
2184 /* CHS current translation */
2185 n_sectors = ata_id_u32(args->id, 57);
2186 }
2187
1da177e4
LT		 2188 n_sectors--; /* ATA TotalUserSectors - 1 */
2189
1da177e4 2190 if (args->cmd->cmnd[0] == READ_CAPACITY) {
0c144d0d
PP		 2191 if( n_sectors >= 0xffffffffULL )
2192 tmp = 0xffffffff ; /* Return max count on overflow */
2193 else
2194 tmp = n_sectors ;
2195
1da177e4
LT		 2196 /* sector count, 32-bit */
2197 rbuf[0] = tmp >> (8 * 3);
2198 rbuf[1] = tmp >> (8 * 2);
2199 rbuf[2] = tmp >> (8 * 1);
2200 rbuf[3] = tmp;
2201
2202 /* sector size */
2203 tmp = ATA_SECT_SIZE;
2204 rbuf[6] = tmp >> 8;
2205 rbuf[7] = tmp;
2206
2207 } else {
2208 /* sector count, 64-bit */
0c144d0d
PP		 2209 tmp = n_sectors >> (8 * 4);
2210 rbuf[2] = tmp >> (8 * 3);
2211 rbuf[3] = tmp >> (8 * 2);
2212 rbuf[4] = tmp >> (8 * 1);
2213 rbuf[5] = tmp;
2214 tmp = n_sectors;
1da177e4
LT		 2215 rbuf[6] = tmp >> (8 * 3);
2216 rbuf[7] = tmp >> (8 * 2);
2217 rbuf[8] = tmp >> (8 * 1);
2218 rbuf[9] = tmp;
2219
2220 /* sector size */
2221 tmp = ATA_SECT_SIZE;
2222 rbuf[12] = tmp >> 8;
2223 rbuf[13] = tmp;
2224 }
2225
2226 return 0;
2227}
2228
2229/**
2230 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2231 * @args: device IDENTIFY data / SCSI command of interest.
2232 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2233 * @buflen: Response buffer length.
2234 *
2235 * Simulate REPORT LUNS command.
2236 *
2237 * LOCKING:
cca3974e 2238 * spin_lock_irqsave(host lock)
1da177e4
LT		 2239 */
2240
2241unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2242 unsigned int buflen)
2243{
2244 VPRINTK("ENTER\n");
2245 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2246
2247 return 0;
2248}
2249
845c5834
DG		 2250/**
2251 * ata_scsi_set_sense - Set SCSI sense data and status
2252 * @cmd: SCSI request to be handled
2253 * @sk: SCSI-defined sense key
2254 * @asc: SCSI-defined additional sense code
2255 * @ascq: SCSI-defined additional sense code qualifier
2256 *
2257 * Helper function that builds a valid fixed format, current
2258 * response code and the given sense key (sk), additional sense
2259 * code (asc) and additional sense code qualifier (ascq) with
2260 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2261 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2262 *
2263 * LOCKING:
2264 * Not required
2265 */
2266
2267void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2268{
2269 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2270
2271 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2272 cmd->sense_buffer[2] = sk;
2273 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2274 cmd->sense_buffer[12] = asc;
2275 cmd->sense_buffer[13] = ascq;
2276}
2277
1da177e4
LT		 2278/**
2279 * ata_scsi_badcmd - End a SCSI request with an error
2280 * @cmd: SCSI request to be handled
2281 * @done: SCSI command completion function
2282 * @asc: SCSI-defined additional sense code
2283 * @ascq: SCSI-defined additional sense code qualifier
2284 *
2285 * Helper function that completes a SCSI command with
2286 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2287 * and the specified additional sense codes.
2288 *
2289 * LOCKING:
cca3974e 2290 * spin_lock_irqsave(host lock)
1da177e4
LT		 2291 */
2292
2293void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2294{
2295 DPRINTK("ENTER\n");
ae006510 2296 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2297
2298 done(cmd);
2299}
2300
77853bf2 2301static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2302{
74e6c8c3 2303 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2304 /* FIXME: not quite right; we don't want the
2305 * translation of taskfile registers into
2306 * a sense descriptors, since that's only
2307 * correct for ATA, not ATAPI
2308 */
2309 ata_gen_ata_desc_sense(qc);
74e6c8c3 2310 }
a939c963 2311
c6e6e666 2312 qc->scsidone(qc->scsicmd);
77853bf2 2313 ata_qc_free(qc);
c6e6e666 2314}
a939c963 2315
c6e6e666
JG		 2316/* is it pointless to prefer PIO for "safety reasons"? */
2317static inline int ata_pio_use_silly(struct ata_port *ap)
2318{
2319 return (ap->flags & ATA_FLAG_PIO_DMA);
2320}
2321
2322static void atapi_request_sense(struct ata_queued_cmd *qc)
2323{
2324 struct ata_port *ap = qc->ap;
2325 struct scsi_cmnd *cmd = qc->scsicmd;
2326
2327 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2328
2329 /* FIXME: is this needed? */
2330 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2331
c6e6e666
JG		 2332 ap->ops->tf_read(ap, &qc->tf);
2333
2334 /* fill these in, for the case where they are -not- overwritten */
2335 cmd->sense_buffer[0] = 0x70;
2336 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2337
2338 ata_qc_reinit(qc);
2339
a939c963
JG		 2340 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2341 qc->dma_dir = DMA_FROM_DEVICE;
2342
6e7846e9 2343 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2344 qc->cdb[0] = REQUEST_SENSE;
2345 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2346
2347 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2348 qc->tf.command = ATA_CMD_PACKET;
2349
c6e6e666
JG		 2350 if (ata_pio_use_silly(ap)) {
2351 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2352 qc->tf.feature |= ATAPI_PKT_DMA;
2353 } else {
2354 qc->tf.protocol = ATA_PROT_ATAPI;
2355 qc->tf.lbam = (8 * 1024) & 0xff;
2356 qc->tf.lbah = (8 * 1024) >> 8;
2357 }
a939c963
JG		 2358 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2359
c6e6e666 2360 qc->complete_fn = atapi_sense_complete;
a939c963 2361
8e0e694a 2362 ata_qc_issue(qc);
a939c963
JG		 2363
2364 DPRINTK("EXIT\n");
2365}
2366
77853bf2 2367static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2368{
2369 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2370 unsigned int err_mask = qc->err_mask;
1da177e4 2371
a7dac447 2372 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2373
246619da
TH		 2374 /* handle completion from new EH */
2375 if (unlikely(qc->ap->ops->error_handler &&
2376 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2377
2378 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2379 /* FIXME: not quite right; we don't want the
2380 * translation of taskfile registers into a
2381 * sense descriptors, since that's only
2382 * correct for ATA, not ATAPI
2383 */
2384 ata_gen_ata_desc_sense(qc);
2385 }
2386
22aac089
TH		 2387 /* SCSI EH automatically locks door if sdev->locked is
2388 * set. Sometimes door lock request continues to
2389 * fail, for example, when no media is present. This
2390 * creates a loop - SCSI EH issues door lock which
2391 * fails and gets invoked again to acquire sense data
2392 * for the failed command.
2393 *
2394 * If door lock fails, always clear sdev->locked to
2395 * avoid this infinite loop.
2396 */
2397 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2398 qc->dev->sdev->locked = 0;
2399
246619da
TH		 2400 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2401 qc->scsidone(cmd);
2402 ata_qc_free(qc);
2403 return;
2404 }
2405
2406 /* successful completion or old EH failure path */
a7dac447 2407 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2408 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2409 atapi_request_sense(qc);
77853bf2 2410 return;
74e6c8c3 2411 } else if (unlikely(err_mask)) {
a7dac447
JG		 2412 /* FIXME: not quite right; we don't want the
2413 * translation of taskfile registers into
2414 * a sense descriptors, since that's only
2415 * correct for ATA, not ATAPI
2416 */
2417 ata_gen_ata_desc_sense(qc);
74e6c8c3 2418 } else {
1da177e4
LT		 2419 u8 *scsicmd = cmd->cmnd;
2420
fd71da46 2421 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2422 u8 *buf = NULL;
2423 unsigned int buflen;
2424
2425 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2426
2427 /* ATAPI devices typically report zero for their SCSI version,
2428 * and sometimes deviate from the spec WRT response data
2429 * format. If SCSI version is reported as zero like normal,
2430 * then we make the following fixups: 1) Fake MMC-5 version,
2431 * to indicate to the Linux scsi midlayer this is a modern
2432 * device. 2) Ensure response data format / ATAPI information
2433 * are always correct.
a15dbeb4
JG		 2434 */
2435 if (buf[2] == 0) {
2436 buf[2] = 0x5;
2437 buf[3] = 0x32;
2438 }
2439
1da177e4
LT		 2440 ata_scsi_rbuf_put(cmd, buf);
2441 }
a15dbeb4 2442
1da177e4
LT		 2443 cmd->result = SAM_STAT_GOOD;
2444 }
2445
2446 qc->scsidone(cmd);
77853bf2 2447 ata_qc_free(qc);
1da177e4
LT		 2448}
2449/**
2450 * atapi_xlat - Initialize PACKET taskfile
2451 * @qc: command structure to be initialized
2452 * @scsicmd: SCSI CDB associated with this PACKET command
2453 *
2454 * LOCKING:
cca3974e 2455 * spin_lock_irqsave(host lock)
1da177e4
LT		 2456 *
2457 * RETURNS:
2458 * Zero on success, non-zero on failure.
2459 */
2460
057ace5e 2461static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 2462{
2463 struct scsi_cmnd *cmd = qc->scsicmd;
2464 struct ata_device *dev = qc->dev;
2465 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db055 2466 int nodata = (cmd->sc_data_direction == DMA_NONE);
1da177e4
LT		 2467
2468 if (!using_pio)
2469 /* Check whether ATAPI DMA is safe */
2470 if (ata_check_atapi_dma(qc))
2471 using_pio = 1;
2472
6e7846e9 2473 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
1da177e4
LT		 2474
2475 qc->complete_fn = atapi_qc_complete;
2476
2477 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db055 2478 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2479 qc->tf.flags |= ATA_TFLAG_WRITE;
2480 DPRINTK("direction: write\n");
2481 }
2482
2483 qc->tf.command = ATA_CMD_PACKET;
2484
2485 /* no data, or PIO data xfer */
2486 if (using_pio || nodata) {
2487 if (nodata)
2488 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2489 else
2490 qc->tf.protocol = ATA_PROT_ATAPI;
2491 qc->tf.lbam = (8 * 1024) & 0xff;
2492 qc->tf.lbah = (8 * 1024) >> 8;
2493 }
2494
2495 /* DMA data xfer */
2496 else {
2497 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2498 qc->tf.feature |= ATAPI_PKT_DMA;
2499
95de719a
AL		 2500 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2501 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2502 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2503 }
2504
5d5ff44f 2505 qc->nbytes = cmd->request_bufflen;
1da177e4
LT		 2506
2507 return 0;
2508}
2509
ab5b3a5b
TH		 2510static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2511{
2512 if (likely(id < ATA_MAX_DEVICES))
2513 return &ap->device[id];
2514 return NULL;
2515}
2516
2517static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2518 const struct scsi_device *scsidev)
2519{
2520 /* skip commands not addressed to targets we simulate */
2521 if (unlikely(scsidev->channel || scsidev->lun))
2522 return NULL;
2523
2524 return ata_find_dev(ap, scsidev->id);
2525}
2526
99ba9e09
BK		 2527/**
2528 * ata_scsi_dev_enabled - determine if device is enabled
2529 * @dev: ATA device
2530 *
2531 * Determine if commands should be sent to the specified device.
2532 *
2533 * LOCKING:
cca3974e 2534 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2535 *
2536 * RETURNS:
2537 * 0 if commands are not allowed / 1 if commands are allowed
2538 */
2539
2540static int ata_scsi_dev_enabled(struct ata_device *dev)
2541{
2542 if (unlikely(!ata_dev_enabled(dev)))
2543 return 0;
2544
2545 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2546 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2547 ata_dev_printk(dev, KERN_WARNING,
2548 "WARNING: ATAPI is %s, device ignored.\n",
2549 atapi_enabled ? "not supported with this driver" : "disabled");
2550 return 0;
2551 }
2552 }
2553
2554 return 1;
2555}
2556
1da177e4
LT		 2557/**
2558 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2559 * @ap: ATA port to which the device is attached
2560 * @scsidev: SCSI device from which we derive the ATA device
2561 *
2562 * Given various information provided in struct scsi_cmnd,
2563 * map that onto an ATA bus, and using that mapping
2564 * determine which ata_device is associated with the
2565 * SCSI command to be sent.
2566 *
2567 * LOCKING:
cca3974e 2568 * spin_lock_irqsave(host lock)
1da177e4
LT		 2569 *
2570 * RETURNS:
2571 * Associated ATA device, or %NULL if not found.
2572 */
1da177e4 2573static struct ata_device *
057ace5e 2574ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2575{
ab5b3a5b 2576 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2577
99ba9e09 2578 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2579 return NULL;
2580
1da177e4
LT		 2581 return dev;
2582}
2583
b095518e
JG		 2584/*
2585 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2586 * @byte1: Byte 1 from pass-thru CDB.
2587 *
2588 * RETURNS:
2589 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2590 */
2591static u8
2592ata_scsi_map_proto(u8 byte1)
2593{
2594 switch((byte1 & 0x1e) >> 1) {
2595 case 3: /* Non-data */
2596 return ATA_PROT_NODATA;
2597
2598 case 6: /* DMA */
2599 return ATA_PROT_DMA;
2600
2601 case 4: /* PIO Data-in */
2602 case 5: /* PIO Data-out */
b095518e
JG		 2603 return ATA_PROT_PIO;
2604
2605 case 10: /* Device Reset */
2606 case 0: /* Hard Reset */
2607 case 1: /* SRST */
2608 case 2: /* Bus Idle */
2609 case 7: /* Packet */
2610 case 8: /* DMA Queued */
2611 case 9: /* Device Diagnostic */
2612 case 11: /* UDMA Data-in */
2613 case 12: /* UDMA Data-Out */
2614 case 13: /* FPDMA */
2615 default: /* Reserved */
2616 break;
2617 }
2618
2619 return ATA_PROT_UNKNOWN;
2620}
2621
2622/**
2623 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2624 * @qc: command structure to be initialized
8e8b77dd 2625 * @scsicmd: SCSI command to convert
b095518e
JG		 2626 *
2627 * Handles either 12 or 16-byte versions of the CDB.
2628 *
2629 * RETURNS:
2630 * Zero on success, non-zero on failure.
2631 */
2632static unsigned int
00ac37f5 2633ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
b095518e
JG		 2634{
2635 struct ata_taskfile *tf = &(qc->tf);
2636 struct scsi_cmnd *cmd = qc->scsicmd;
f79d409f 2637 struct ata_device *dev = qc->dev;
b095518e
JG		 2638
2639 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
9a405257 2640 goto invalid_fld;
8190bdb9 2641
f79d409f
AC		 2642 /* We may not issue DMA commands if no DMA mode is set */
2643 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2644 goto invalid_fld;
b095518e 2645
f59b0cf8
AL		 2646 if (scsicmd[1] & 0xe0)
2647 /* PIO multi not supported yet */
2648 goto invalid_fld;
2649
b095518e
JG		 2650 /*
2651 * 12 and 16 byte CDBs use different offsets to
2652 * provide the various register values.
2653 */
2654 if (scsicmd[0] == ATA_16) {
2655 /*
2656 * 16-byte CDB - may contain extended commands.
2657 *
2658 * If that is the case, copy the upper byte register values.
2659 */
2660 if (scsicmd[1] & 0x01) {
2661 tf->hob_feature = scsicmd[3];
2662 tf->hob_nsect = scsicmd[5];
2663 tf->hob_lbal = scsicmd[7];
2664 tf->hob_lbam = scsicmd[9];
2665 tf->hob_lbah = scsicmd[11];
2666 tf->flags |= ATA_TFLAG_LBA48;
2667 } else
2668 tf->flags &= ~ATA_TFLAG_LBA48;
2669
2670 /*
2671 * Always copy low byte, device and command registers.
2672 */
2673 tf->feature = scsicmd[4];
2674 tf->nsect = scsicmd[6];
2675 tf->lbal = scsicmd[8];
2676 tf->lbam = scsicmd[10];
2677 tf->lbah = scsicmd[12];
2678 tf->device = scsicmd[13];
2679 tf->command = scsicmd[14];
2680 } else {
2681 /*
2682 * 12-byte CDB - incapable of extended commands.
2683 */
2684 tf->flags &= ~ATA_TFLAG_LBA48;
2685
2686 tf->feature = scsicmd[3];
2687 tf->nsect = scsicmd[4];
2688 tf->lbal = scsicmd[5];
2689 tf->lbam = scsicmd[6];
2690 tf->lbah = scsicmd[7];
2691 tf->device = scsicmd[8];
2692 tf->command = scsicmd[9];
2693 }
dcc2d1e7
ML		 2694 /*
2695 * If slave is possible, enforce correct master/slave bit
2696 */
2697 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2698 tf->device = qc->dev->devno ?
2699 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e
JG		 2700
2701 /*
2702 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2703 * SET_FEATURES - XFER MODE must be preceded/succeeded
2704 * by an update to hardware-specific registers for each
2705 * controller (i.e. the reason for ->set_piomode(),
2706 * ->set_dmamode(), and ->post_set_mode() hooks).
2707 */
2708 if ((tf->command == ATA_CMD_SET_FEATURES)
2709 && (tf->feature == SETFEATURES_XFER))
9a405257 2710 goto invalid_fld;
b095518e
JG		 2711
2712 /*
2713 * Set flags so that all registers will be written,
2714 * and pass on write indication (used for PIO/DMA
2715 * setup.)
2716 */
2717 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2718
0274aa25 2719 if (cmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2720 tf->flags |= ATA_TFLAG_WRITE;
2721
2722 /*
2723 * Set transfer length.
2724 *
2725 * TODO: find out if we need to do more here to
2726 * cover scatter/gather case.
2727 */
5d5ff44f 2728 qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
b095518e 2729
e61e0672
TH		 2730 /* request result TF */
2731 qc->flags |= ATA_QCFLAG_RESULT_TF;
2732
b095518e 2733 return 0;
9a405257
TH		 2734
2735 invalid_fld:
2736 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2737 /* "Invalid field in cdb" */
2738 return 1;
b095518e
JG		 2739}
2740
1da177e4
LT		 2741/**
2742 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2743 * @dev: ATA device
2744 * @cmd: SCSI command opcode to consider
2745 *
2746 * Look up the SCSI command given, and determine whether the
2747 * SCSI command is to be translated or simulated.
2748 *
2749 * RETURNS:
2750 * Pointer to translation function if possible, %NULL if not.
2751 */
2752
2753static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2754{
2755 switch (cmd) {
2756 case READ_6:
2757 case READ_10:
2758 case READ_16:
2759
2760 case WRITE_6:
2761 case WRITE_10:
2762 case WRITE_16:
2763 return ata_scsi_rw_xlat;
2764
2765 case SYNCHRONIZE_CACHE:
2766 if (ata_try_flush_cache(dev))
2767 return ata_scsi_flush_xlat;
2768 break;
2769
2770 case VERIFY:
2771 case VERIFY_16:
2772 return ata_scsi_verify_xlat;
b095518e
JG		 2773
2774 case ATA_12:
2775 case ATA_16:
2776 return ata_scsi_pass_thru;
da61396d 2777
972dcafb
DG		 2778 case START_STOP:
2779 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2780 }
2781
2782 return NULL;
2783}
2784
2785/**
2786 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2787 * @ap: ATA port to which the command was being sent
2788 * @cmd: SCSI command to dump
2789 *
2790 * Prints the contents of a SCSI command via printk().
2791 */
2792
2793static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2794 struct scsi_cmnd *cmd)
2795{
2796#ifdef ATA_DEBUG
2797 struct scsi_device *scsidev = cmd->device;
2798 u8 *scsicmd = cmd->cmnd;
2799
2800 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2801 ap->id,
2802 scsidev->channel, scsidev->id, scsidev->lun,
2803 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2804 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2805 scsicmd[8]);
2806#endif
2807}
2808
2115ea94
TH		 2809static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2810 void (*done)(struct scsi_cmnd *),
2811 struct ata_device *dev)
eb3f0f9c 2812{
2115ea94
TH		 2813 int rc = 0;
2814
eb3f0f9c
BK		 2815 if (dev->class == ATA_DEV_ATA) {
2816 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2817 cmd->cmnd[0]);
2818
2819 if (xlat_func)
2115ea94 2820 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
eb3f0f9c 2821 else
3373efd8 2822 ata_scsi_simulate(dev, cmd, done);
eb3f0f9c 2823 } else
2115ea94
TH		 2824 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2825
2826 return rc;
eb3f0f9c
BK		 2827}
2828
1da177e4
LT		 2829/**
2830 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2831 * @cmd: SCSI command to be sent
2832 * @done: Completion function, called when command is complete
2833 *
2834 * In some cases, this function translates SCSI commands into
2835 * ATA taskfiles, and queues the taskfiles to be sent to
2836 * hardware. In other cases, this function simulates a
2837 * SCSI device by evaluating and responding to certain
2838 * SCSI commands. This creates the overall effect of
2839 * ATA and ATAPI devices appearing as SCSI devices.
2840 *
2841 * LOCKING:
cca3974e 2842 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2843 *
2844 * RETURNS:
2115ea94
TH		 2845 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2846 * 0 otherwise.
1da177e4 2847 */
1da177e4
LT		 2848int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2849{
2850 struct ata_port *ap;
2851 struct ata_device *dev;
2852 struct scsi_device *scsidev = cmd->device;
005a5a06 2853 struct Scsi_Host *shost = scsidev->host;
2115ea94 2854 int rc = 0;
1da177e4 2855
35bb94b1 2856 ap = ata_shost_to_port(shost);
005a5a06
JG		 2857
2858 spin_unlock(shost->host_lock);
ba6a1308 2859 spin_lock(ap->lock);
1da177e4
LT		 2860
2861 ata_scsi_dump_cdb(ap, cmd);
2862
2863 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2864 if (likely(dev))
2115ea94 2865 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2866 else {
1da177e4
LT		 2867 cmd->result = (DID_BAD_TARGET << 16);
2868 done(cmd);
1da177e4
LT		 2869 }
2870
ba6a1308 2871 spin_unlock(ap->lock);
005a5a06 2872 spin_lock(shost->host_lock);
2115ea94 2873 return rc;
1da177e4
LT		 2874}
2875
2876/**
2877 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2878 * @dev: the target device
1da177e4
LT		 2879 * @cmd: SCSI command being sent to device.
2880 * @done: SCSI command completion function.
2881 *
2882 * Interprets and directly executes a select list of SCSI commands
2883 * that can be handled internally.
2884 *
2885 * LOCKING:
cca3974e 2886 * spin_lock_irqsave(host lock)
1da177e4
LT		 2887 */
2888
3373efd8 2889void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2890 void (*done)(struct scsi_cmnd *))
2891{
2892 struct ata_scsi_args args;
057ace5e 2893 const u8 *scsicmd = cmd->cmnd;
1da177e4 2894
9a3dccc4
TH		 2895 args.dev = dev;
2896 args.id = dev->id;
1da177e4
LT		 2897 args.cmd = cmd;
2898 args.done = done;
2899
2900 switch(scsicmd[0]) {
2901 /* no-op's, complete with success */
2902 case SYNCHRONIZE_CACHE:
2903 case REZERO_UNIT:
2904 case SEEK_6:
2905 case SEEK_10:
2906 case TEST_UNIT_READY:
2907 case FORMAT_UNIT: /* FIXME: correct? */
2908 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2909 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2910 break;
2911
2912 case INQUIRY:
2913 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2914 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2915 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2916 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2917 else if (scsicmd[2] == 0x00)
2918 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2919 else if (scsicmd[2] == 0x80)
2920 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2921 else if (scsicmd[2] == 0x83)
2922 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2923 else
ae006510 2924 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2925 break;
2926
2927 case MODE_SENSE:
2928 case MODE_SENSE_10:
2929 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2930 break;
2931
2932 case MODE_SELECT: /* unconditionally return */
2933 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2934 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2935 break;
2936
2937 case READ_CAPACITY:
2938 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2939 break;
2940
2941 case SERVICE_ACTION_IN:
2942 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2943 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2944 else
ae006510 2945 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2946 break;
2947
2948 case REPORT_LUNS:
2949 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2950 break;
2951
b095518e 2952 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2953 case REQUEST_SENSE:
2954
2955 /* all other commands */
2956 default:
ae006510
DG		 2957 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2958 /* "Invalid command operation code" */
2959 done(cmd);
1da177e4
LT		 2960 break;
2961 }
2962}
2963
644dd0cc
JG		 2964void ata_scsi_scan_host(struct ata_port *ap)
2965{
2966 unsigned int i;
2967
198e0fed 2968 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2969 return;
2970
3f19ee8c 2971 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3edebac4
TH		 2972 struct ata_device *dev = &ap->device[i];
2973 struct scsi_device *sdev;
2974
2975 if (!ata_dev_enabled(dev) || dev->sdev)
2976 continue;
3f19ee8c 2977
cca3974e 2978 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
3edebac4
TH		 2979 if (!IS_ERR(sdev)) {
2980 dev->sdev = sdev;
2981 scsi_device_put(sdev);
2982 }
3f19ee8c 2983 }
644dd0cc 2984}
0ea035a3
TH		 2985
2986/**
2987 * ata_scsi_offline_dev - offline attached SCSI device
2988 * @dev: ATA device to offline attached SCSI device for
2989 *
2990 * This function is called from ata_eh_hotplug() and responsible
2991 * for taking the SCSI device attached to @dev offline. This
cca3974e 2992 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 2993 * against clearing.
2994 *
2995 * LOCKING:
cca3974e 2996 * spin_lock_irqsave(host lock)
0ea035a3
TH		 2997 *
2998 * RETURNS:
2999 * 1 if attached SCSI device exists, 0 otherwise.
3000 */
3001int ata_scsi_offline_dev(struct ata_device *dev)
3002{
3003 if (dev->sdev) {
3004 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3005 return 1;
3006 }
3007 return 0;
3008}
580b2102
TH		 3009
3010/**
3011 * ata_scsi_remove_dev - remove attached SCSI device
3012 * @dev: ATA device to remove attached SCSI device for
3013 *
3014 * This function is called from ata_eh_scsi_hotplug() and
3015 * responsible for removing the SCSI device attached to @dev.
3016 *
3017 * LOCKING:
3018 * Kernel thread context (may sleep).
3019 */
3020static void ata_scsi_remove_dev(struct ata_device *dev)
3021{
3022 struct ata_port *ap = dev->ap;
3023 struct scsi_device *sdev;
3024 unsigned long flags;
3025
3026 /* Alas, we need to grab scan_mutex to ensure SCSI device
3027 * state doesn't change underneath us and thus
3028 * scsi_device_get() always succeeds. The mutex locking can
3029 * be removed if there is __scsi_device_get() interface which
3030 * increments reference counts regardless of device state.
3031 */
cca3974e 3032 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3033 spin_lock_irqsave(ap->lock, flags);
580b2102 3034
cca3974e 3035 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3036 sdev = dev->sdev;
3037 dev->sdev = NULL;
3038
3039 if (sdev) {
3040 /* If user initiated unplug races with us, sdev can go
cca3974e 3041 * away underneath us after the host lock and
580b2102
TH		 3042 * scan_mutex are released. Hold onto it.
3043 */
3044 if (scsi_device_get(sdev) == 0) {
3045 /* The following ensures the attached sdev is
3046 * offline on return from ata_scsi_offline_dev()
3047 * regardless it wins or loses the race
3048 * against this function.
3049 */
3050 scsi_device_set_state(sdev, SDEV_OFFLINE);
3051 } else {
3052 WARN_ON(1);
3053 sdev = NULL;
3054 }
3055 }
3056
ba6a1308 3057 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3058 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3059
3060 if (sdev) {
3061 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3062 sdev->sdev_gendev.bus_id);
3063
3064 scsi_remove_device(sdev);
3065 scsi_device_put(sdev);
3066 }
3067}
3068
3069/**
3070 * ata_scsi_hotplug - SCSI part of hotplug
3071 * @data: Pointer to ATA port to perform SCSI hotplug on
3072 *
3073 * Perform SCSI part of hotplug. It's executed from a separate
3074 * workqueue after EH completes. This is necessary because SCSI
3075 * hot plugging requires working EH and hot unplugging is
3076 * synchronized with hot plugging with a mutex.
3077 *
3078 * LOCKING:
3079 * Kernel thread context (may sleep).
3080 */
3081void ata_scsi_hotplug(void *data)
3082{
3083 struct ata_port *ap = data;
3084 int i;
3085
b51e9e5d 3086 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3087 DPRINTK("ENTER/EXIT - unloading\n");
3088 return;
3089 }
3090
3091 DPRINTK("ENTER\n");
3092
3093 /* unplug detached devices */
3094 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3095 struct ata_device *dev = &ap->device[i];
3096 unsigned long flags;
3097
3098 if (!(dev->flags & ATA_DFLAG_DETACHED))
3099 continue;
3100
ba6a1308 3101 spin_lock_irqsave(ap->lock, flags);
580b2102 3102 dev->flags &= ~ATA_DFLAG_DETACHED;
ba6a1308 3103 spin_unlock_irqrestore(ap->lock, flags);
580b2102
TH		 3104
3105 ata_scsi_remove_dev(dev);
3106 }
3107
3108 /* scan for new ones */
3109 ata_scsi_scan_host(ap);
3110
3111 /* If we scanned while EH was in progress, scan would have
3112 * failed silently. Requeue if there are enabled but
3113 * unattached devices.
3114 */
3115 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3116 struct ata_device *dev = &ap->device[i];
3117 if (ata_dev_enabled(dev) && !dev->sdev) {
3118 queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
3119 break;
3120 }
3121 }
3122
3123 DPRINTK("EXIT\n");
3124}
83c47bcb
TH		 3125
3126/**
3127 * ata_scsi_user_scan - indication for user-initiated bus scan
3128 * @shost: SCSI host to scan
3129 * @channel: Channel to scan
3130 * @id: ID to scan
3131 * @lun: LUN to scan
3132 *
3133 * This function is called when user explicitly requests bus
3134 * scan. Set probe pending flag and invoke EH.
3135 *
3136 * LOCKING:
3137 * SCSI layer (we don't care)
3138 *
3139 * RETURNS:
3140 * Zero.
3141 */
3142static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3143 unsigned int id, unsigned int lun)
3144{
3145 struct ata_port *ap = ata_shost_to_port(shost);
3146 unsigned long flags;
3147 int rc = 0;
3148
3149 if (!ap->ops->error_handler)
3150 return -EOPNOTSUPP;
3151
3152 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3153 (lun != SCAN_WILD_CARD && lun != 0))
3154 return -EINVAL;
3155
ba6a1308 3156 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 3157
3158 if (id == SCAN_WILD_CARD) {
3159 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3160 ap->eh_info.action |= ATA_EH_SOFTRESET;
3161 } else {
3162 struct ata_device *dev = ata_find_dev(ap, id);
3163
3164 if (dev) {
3165 ap->eh_info.probe_mask |= 1 << dev->devno;
3166 ap->eh_info.action |= ATA_EH_SOFTRESET;
28324304 3167 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3168 } else
3169 rc = -EINVAL;
3170 }
3171
309afcb5 3172 if (rc == 0) {
83c47bcb 3173 ata_port_schedule_eh(ap);
309afcb5
TH		 3174 spin_unlock_irqrestore(ap->lock, flags);
3175 ata_port_wait_eh(ap);
3176 } else
3177 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3178
3179 return rc;
3180}
3057ac3c 3181
3182/**
d0171269
TH		 3183 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3184 * @data: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3185 *
d0171269
TH		 3186 * After ATA pass thru (SAT) commands are executed successfully,
3187 * libata need to propagate the changes to SCSI layer. This
3188 * function must be executed from ata_aux_wq such that sdev
3189 * attach/detach don't race with rescan.
3057ac3c 3190 *
d0171269
TH		 3191 * LOCKING:
3192 * Kernel thread context (may sleep).
3057ac3c 3193 */
3194void ata_scsi_dev_rescan(void *data)
3195{
3196 struct ata_port *ap = data;
3197 struct ata_device *dev;
3198 unsigned int i;
3199
3200 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3201 dev = &ap->device[i];
3202
d0171269 3203 if (ata_dev_enabled(dev) && dev->sdev)
3057ac3c 3204 scsi_rescan_device(&(dev->sdev->sdev_gendev));
3205 }
3206}
80289167
BK		 3207
3208/**
3209 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3210 * @host: ATA host container for all SAS ports
80289167 3211 * @port_info: Information from low-level host driver
cca3974e 3212 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3213 *
3214 * LOCKING:
3215 * PCI/etc. bus probe sem.
3216 *
3217 * RETURNS:
3218 * ata_port pointer on success / NULL on failure.
3219 */
3220
cca3974e 3221struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3222 struct ata_port_info *port_info,
cca3974e 3223 struct Scsi_Host *shost)
80289167
BK		 3224{
3225 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3226 struct ata_probe_ent *ent;
3227
3228 if (!ap)
3229 return NULL;
3230
cca3974e 3231 ent = ata_probe_ent_alloc(host->dev, port_info);
80289167
BK		 3232 if (!ent) {
3233 kfree(ap);
3234 return NULL;
3235 }
3236
cca3974e
JG		 3237 ata_port_init(ap, host, ent, 0);
3238 ap->lock = shost->host_lock;
80289167
BK		 3239 kfree(ent);
3240 return ap;
3241}
3242EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3243
3244/**
3245 * ata_sas_port_start - Set port up for dma.
3246 * @ap: Port to initialize
3247 *
3248 * Called just after data structures for each port are
3249 * initialized. Allocates DMA pad.
3250 *
3251 * May be used as the port_start() entry in ata_port_operations.
3252 *
3253 * LOCKING:
3254 * Inherited from caller.
3255 */
3256int ata_sas_port_start(struct ata_port *ap)
3257{
3258 return ata_pad_alloc(ap, ap->dev);
3259}
3260EXPORT_SYMBOL_GPL(ata_sas_port_start);
3261
3262/**
3263 * ata_port_stop - Undo ata_sas_port_start()
3264 * @ap: Port to shut down
3265 *
3266 * Frees the DMA pad.
3267 *
3268 * May be used as the port_stop() entry in ata_port_operations.
3269 *
3270 * LOCKING:
3271 * Inherited from caller.
3272 */
3273
3274void ata_sas_port_stop(struct ata_port *ap)
3275{
3276 ata_pad_free(ap, ap->dev);
3277}
3278EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3279
3280/**
3281 * ata_sas_port_init - Initialize a SATA device
3282 * @ap: SATA port to initialize
3283 *
3284 * LOCKING:
3285 * PCI/etc. bus probe sem.
3286 *
3287 * RETURNS:
3288 * Zero on success, non-zero on error.
3289 */
3290
3291int ata_sas_port_init(struct ata_port *ap)
3292{
3293 int rc = ap->ops->port_start(ap);
3294
3295 if (!rc)
3296 rc = ata_bus_probe(ap);
3297
3298 return rc;
3299}
3300EXPORT_SYMBOL_GPL(ata_sas_port_init);
3301
3302/**
3303 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3304 * @ap: SATA port to destroy
3305 *
3306 */
3307
3308void ata_sas_port_destroy(struct ata_port *ap)
3309{
3310 ap->ops->port_stop(ap);
3311 kfree(ap);
3312}
3313EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3314
3315/**
3316 * ata_sas_slave_configure - Default slave_config routine for libata devices
3317 * @sdev: SCSI device to configure
3318 * @ap: ATA port to which SCSI device is attached
3319 *
3320 * RETURNS:
3321 * Zero.
3322 */
3323
3324int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3325{
3326 ata_scsi_sdev_config(sdev);
3327 ata_scsi_dev_config(sdev, ap->device);
3328 return 0;
3329}
3330EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3331
3332/**
3333 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3334 * @cmd: SCSI command to be sent
3335 * @done: Completion function, called when command is complete
3336 * @ap: ATA port to which the command is being sent
3337 *
3338 * RETURNS:
08475a19
BK		 3339 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3340 * 0 otherwise.
80289167
BK		 3341 */
3342
3343int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3344 struct ata_port *ap)
3345{
08475a19
BK		 3346 int rc = 0;
3347
80289167
BK		 3348 ata_scsi_dump_cdb(ap, cmd);
3349
3350 if (likely(ata_scsi_dev_enabled(ap->device)))
08475a19 3351 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
80289167
BK		 3352 else {
3353 cmd->result = (DID_BAD_TARGET << 16);
3354 done(cmd);
3355 }
08475a19 3356 return rc;
80289167
BK		 3357}
3358EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
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