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[PATCH] libata: fix passthru sense data header
[deliverable/linux.git] / drivers / ata / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
1da177e4 40#include <scsi/scsi_host.h>
beb40487 41#include <scsi/scsi_cmnd.h>
85837ebd 42#include <scsi/scsi_eh.h>
005a5a06 43#include <scsi/scsi_device.h>
a6e6ce8e 44#include <scsi/scsi_tcq.h>
30afc84c 45#include <scsi/scsi_transport.h>
1da177e4 46#include <linux/libata.h>
b095518e 47#include <linux/hdreg.h>
1da177e4
LT		 48#include <asm/uaccess.h>
49
50#include "libata.h"
51
b095518e
JG		 52#define SECTOR_SIZE 512
53
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
f38621b3
TH		 716 /* set length of additional sense data */
717 sb[7] = 14;
718 desc[1] = 12;
b095518e
JG		 719
720 /*
721 * Copy registers into sense buffer.
722 */
723 desc[2] = 0x00;
724 desc[3] = tf->feature; /* == error reg */
725 desc[5] = tf->nsect;
726 desc[7] = tf->lbal;
727 desc[9] = tf->lbam;
728 desc[11] = tf->lbah;
729 desc[12] = tf->device;
730 desc[13] = tf->command; /* == status reg */
731
732 /*
733 * Fill in Extend bit, and the high order bytes
734 * if applicable.
735 */
736 if (tf->flags & ATA_TFLAG_LBA48) {
737 desc[2] |= 0x01;
738 desc[4] = tf->hob_nsect;
739 desc[6] = tf->hob_lbal;
740 desc[8] = tf->hob_lbam;
741 desc[10] = tf->hob_lbah;
1da177e4 742 }
b095518e 743}
1da177e4 744
b095518e
JG		 745/**
746 * ata_gen_fixed_sense - generate a SCSI fixed sense block
747 * @qc: Command that we are erroring out
748 *
749 * Leverage ata_to_sense_error() to give us the codes. Fit our
750 * LBA in here if there's room.
751 *
752 * LOCKING:
753 * inherited from caller
754 */
755void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
756{
757 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 758 struct ata_taskfile *tf = &qc->result_tf;
b095518e 759 unsigned char *sb = cmd->sense_buffer;
246619da 760 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 761
762 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
763
0e5dec47 764 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 765
b095518e
JG		 766 /*
767 * Use ata_to_sense_error() to map status register bits
768 * onto sense key, asc & ascq.
769 */
058e55e1
TH		 770 if (qc->err_mask ||
771 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 772 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 773 &sb[2], &sb[12], &sb[13], verbose);
b095518e 774 sb[2] &= 0x0f;
1da177e4 775 }
1da177e4
LT		 776
777 sb[0] = 0x70;
b095518e 778 sb[7] = 0x0a;
0274aa25 779
a7dac447
JG		 780 if (tf->flags & ATA_TFLAG_LBA48) {
781 /* TODO: find solution for LBA48 descriptors */
782 }
783
784 else if (tf->flags & ATA_TFLAG_LBA) {
b095518e
JG		 785 /* A small (28b) LBA will fit in the 32b info field */
786 sb[0] |= 0x80; /* set valid bit */
787 sb[3] = tf->device & 0x0f;
788 sb[4] = tf->lbah;
789 sb[5] = tf->lbam;
790 sb[6] = tf->lbal;
1da177e4 791 }
a7dac447
JG		 792
793 else {
794 /* TODO: C/H/S */
795 }
1da177e4
LT		 796}
797
a6cce2a7
BK		 798static void ata_scsi_sdev_config(struct scsi_device *sdev)
799{
800 sdev->use_10_for_rw = 1;
801 sdev->use_10_for_ms = 1;
802}
803
804static void ata_scsi_dev_config(struct scsi_device *sdev,
805 struct ata_device *dev)
806{
914ed354
TH		 807 /* configure max sectors */
808 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
a6cce2a7 809
914ed354 810 /* SATA DMA transfers must be multiples of 4 byte, so
a6cce2a7
BK		 811 * we need to pad ATAPI transfers using an extra sg.
812 * Decrement max hw segments accordingly.
813 */
814 if (dev->class == ATA_DEV_ATAPI) {
815 request_queue_t *q = sdev->request_queue;
816 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
817 }
a6e6ce8e
TH		 818
819 if (dev->flags & ATA_DFLAG_NCQ) {
820 int depth;
821
822 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
823 depth = min(ATA_MAX_QUEUE - 1, depth);
824 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
825 }
a6cce2a7
BK		 826}
827
1da177e4
LT		 828/**
829 * ata_scsi_slave_config - Set SCSI device attributes
830 * @sdev: SCSI device to examine
831 *
832 * This is called before we actually start reading
833 * and writing to the device, to configure certain
834 * SCSI mid-layer behaviors.
835 *
836 * LOCKING:
837 * Defined by SCSI layer. We don't really care.
838 */
839
840int ata_scsi_slave_config(struct scsi_device *sdev)
841{
31534363
TH		 842 struct ata_port *ap = ata_shost_to_port(sdev->host);
843 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
844
a6cce2a7 845 ata_scsi_sdev_config(sdev);
1da177e4
LT		 846
847 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
848
31534363 849 if (dev)
a6cce2a7 850 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 851
852 return 0; /* scsi layer doesn't check return value, sigh */
853}
854
83c47bcb
TH		 855/**
856 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
857 * @sdev: SCSI device to be destroyed
858 *
859 * @sdev is about to be destroyed for hot/warm unplugging. If
860 * this unplugging was initiated by libata as indicated by NULL
861 * dev->sdev, this function doesn't have to do anything.
862 * Otherwise, SCSI layer initiated warm-unplug is in progress.
863 * Clear dev->sdev, schedule the device for ATA detach and invoke
864 * EH.
865 *
866 * LOCKING:
867 * Defined by SCSI layer. We don't really care.
868 */
869void ata_scsi_slave_destroy(struct scsi_device *sdev)
870{
871 struct ata_port *ap = ata_shost_to_port(sdev->host);
872 unsigned long flags;
873 struct ata_device *dev;
874
875 if (!ap->ops->error_handler)
876 return;
877
ba6a1308 878 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 879 dev = __ata_scsi_find_dev(ap, sdev);
880 if (dev && dev->sdev) {
881 /* SCSI device already in CANCEL state, no need to offline it */
882 dev->sdev = NULL;
883 dev->flags |= ATA_DFLAG_DETACH;
884 ata_port_schedule_eh(ap);
885 }
ba6a1308 886 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 887}
888
a6e6ce8e
TH		 889/**
890 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
891 * @sdev: SCSI device to configure queue depth for
892 * @queue_depth: new queue depth
893 *
894 * This is libata standard hostt->change_queue_depth callback.
895 * SCSI will call into this callback when user tries to set queue
896 * depth via sysfs.
897 *
898 * LOCKING:
899 * SCSI layer (we don't care)
900 *
901 * RETURNS:
902 * Newly configured queue depth.
903 */
904int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
905{
906 struct ata_port *ap = ata_shost_to_port(sdev->host);
907 struct ata_device *dev;
360f654e 908 unsigned long flags;
a6e6ce8e
TH		 909 int max_depth;
910
911 if (queue_depth < 1)
912 return sdev->queue_depth;
913
914 dev = ata_scsi_find_dev(ap, sdev);
915 if (!dev || !ata_dev_enabled(dev))
916 return sdev->queue_depth;
917
918 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
919 max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
920 if (queue_depth > max_depth)
921 queue_depth = max_depth;
922
923 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
360f654e
TH		 924
925 spin_lock_irqsave(ap->lock, flags);
926 if (queue_depth > 1)
927 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
928 else
929 dev->flags |= ATA_DFLAG_NCQ_OFF;
930 spin_unlock_irqrestore(ap->lock, flags);
931
a6e6ce8e
TH		 932 return queue_depth;
933}
934
972dcafb
DG		 935/**
936 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
937 * @qc: Storage for translated ATA taskfile
938 * @scsicmd: SCSI command to translate
939 *
940 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
941 * (to start). Perhaps these commands should be preceded by
942 * CHECK POWER MODE to see what power mode the device is already in.
943 * [See SAT revision 5 at www.t10.org]
944 *
945 * LOCKING:
cca3974e 946 * spin_lock_irqsave(host lock)
972dcafb
DG		 947 *
948 * RETURNS:
949 * Zero on success, non-zero on error.
950 */
951
952static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
057ace5e 953 const u8 *scsicmd)
972dcafb
DG		 954{
955 struct ata_taskfile *tf = &qc->tf;
956
957 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
958 tf->protocol = ATA_PROT_NODATA;
959 if (scsicmd[1] & 0x1) {
960 ; /* ignore IMMED bit, violates sat-r05 */
961 }
962 if (scsicmd[4] & 0x2)
ae006510 963 goto invalid_fld; /* LOEJ bit set not supported */
972dcafb 964 if (((scsicmd[4] >> 4) & 0xf) != 0)
ae006510 965 goto invalid_fld; /* power conditions not supported */
972dcafb
DG		 966 if (scsicmd[4] & 0x1) {
967 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 968
969 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 970 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 971
972 tf->lbah = 0x0;
973 tf->lbam = 0x0;
974 tf->lbal = 0x0;
975 tf->device |= ATA_LBA;
976 } else {
977 /* CHS */
978 tf->lbal = 0x1; /* sect */
979 tf->lbam = 0x0; /* cyl low */
980 tf->lbah = 0x0; /* cyl high */
981 }
982
972dcafb
DG		 983 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
984 } else {
985 tf->nsect = 0; /* time period value (0 implies now) */
986 tf->command = ATA_CMD_STANDBY;
987 /* Consider: ATA STANDBY IMMEDIATE command */
988 }
989 /*
990 * Standby and Idle condition timers could be implemented but that
991 * would require libata to implement the Power condition mode page
992 * and allow the user to change it. Changing mode pages requires
993 * MODE SELECT to be implemented.
994 */
995
996 return 0;
ae006510
DG		 997
998invalid_fld:
999 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1000 /* "Invalid field in cbd" */
1001 return 1;
972dcafb
DG		 1002}
1003
1004
1da177e4
LT		 1005/**
1006 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1007 * @qc: Storage for translated ATA taskfile
1008 * @scsicmd: SCSI command to translate (ignored)
1009 *
1010 * Sets up an ATA taskfile to issue FLUSH CACHE or
1011 * FLUSH CACHE EXT.
1012 *
1013 * LOCKING:
cca3974e 1014 * spin_lock_irqsave(host lock)
1da177e4
LT		 1015 *
1016 * RETURNS:
1017 * Zero on success, non-zero on error.
1018 */
1019
057ace5e 1020static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1021{
1022 struct ata_taskfile *tf = &qc->tf;
1023
1024 tf->flags |= ATA_TFLAG_DEVICE;
1025 tf->protocol = ATA_PROT_NODATA;
1026
6fc49adb 1027 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1da177e4
LT		 1028 tf->command = ATA_CMD_FLUSH_EXT;
1029 else
1030 tf->command = ATA_CMD_FLUSH;
1031
1032 return 0;
1033}
1034
3aef5231
AL		 1035/**
1036 * scsi_6_lba_len - Get LBA and transfer length
1037 * @scsicmd: SCSI command to translate
1038 *
1039 * Calculate LBA and transfer length for 6-byte commands.
1040 *
1041 * RETURNS:
1042 * @plba: the LBA
1043 * @plen: the transfer length
1044 */
1045
057ace5e 1046static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1047{
1048 u64 lba = 0;
1049 u32 len = 0;
1050
1051 VPRINTK("six-byte command\n");
1052
1053 lba |= ((u64)scsicmd[2]) << 8;
1054 lba |= ((u64)scsicmd[3]);
1055
1056 len |= ((u32)scsicmd[4]);
1057
1058 *plba = lba;
1059 *plen = len;
1060}
1061
1062/**
1063 * scsi_10_lba_len - Get LBA and transfer length
1064 * @scsicmd: SCSI command to translate
1065 *
1066 * Calculate LBA and transfer length for 10-byte commands.
1067 *
1068 * RETURNS:
1069 * @plba: the LBA
1070 * @plen: the transfer length
1071 */
1072
057ace5e 1073static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1074{
1075 u64 lba = 0;
1076 u32 len = 0;
1077
1078 VPRINTK("ten-byte command\n");
1079
1080 lba |= ((u64)scsicmd[2]) << 24;
1081 lba |= ((u64)scsicmd[3]) << 16;
1082 lba |= ((u64)scsicmd[4]) << 8;
1083 lba |= ((u64)scsicmd[5]);
1084
1085 len |= ((u32)scsicmd[7]) << 8;
1086 len |= ((u32)scsicmd[8]);
1087
1088 *plba = lba;
1089 *plen = len;
1090}
1091
1092/**
1093 * scsi_16_lba_len - Get LBA and transfer length
1094 * @scsicmd: SCSI command to translate
1095 *
1096 * Calculate LBA and transfer length for 16-byte commands.
1097 *
1098 * RETURNS:
1099 * @plba: the LBA
1100 * @plen: the transfer length
1101 */
1102
057ace5e 1103static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1104{
1105 u64 lba = 0;
1106 u32 len = 0;
1107
1108 VPRINTK("sixteen-byte command\n");
1109
1110 lba |= ((u64)scsicmd[2]) << 56;
1111 lba |= ((u64)scsicmd[3]) << 48;
1112 lba |= ((u64)scsicmd[4]) << 40;
1113 lba |= ((u64)scsicmd[5]) << 32;
1114 lba |= ((u64)scsicmd[6]) << 24;
1115 lba |= ((u64)scsicmd[7]) << 16;
1116 lba |= ((u64)scsicmd[8]) << 8;
1117 lba |= ((u64)scsicmd[9]);
1118
1119 len |= ((u32)scsicmd[10]) << 24;
1120 len |= ((u32)scsicmd[11]) << 16;
1121 len |= ((u32)scsicmd[12]) << 8;
1122 len |= ((u32)scsicmd[13]);
1123
1124 *plba = lba;
1125 *plen = len;
1126}
1127
1da177e4
LT		 1128/**
1129 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1130 * @qc: Storage for translated ATA taskfile
1131 * @scsicmd: SCSI command to translate
1132 *
1133 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1134 *
1135 * LOCKING:
cca3974e 1136 * spin_lock_irqsave(host lock)
1da177e4
LT		 1137 *
1138 * RETURNS:
1139 * Zero on success, non-zero on error.
1140 */
1141
057ace5e 1142static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1143{
1144 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1145 struct ata_device *dev = qc->dev;
1da177e4 1146 u64 dev_sectors = qc->dev->n_sectors;
3aef5231
AL		 1147 u64 block;
1148 u32 n_block;
1da177e4
LT		 1149
1150 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1151 tf->protocol = ATA_PROT_NODATA;
1da177e4 1152
3aef5231
AL		 1153 if (scsicmd[0] == VERIFY)
1154 scsi_10_lba_len(scsicmd, &block, &n_block);
1155 else if (scsicmd[0] == VERIFY_16)
1156 scsi_16_lba_len(scsicmd, &block, &n_block);
1da177e4 1157 else
ae006510 1158 goto invalid_fld;
1da177e4 1159
8bf62ece 1160 if (!n_block)
ae006510 1161 goto nothing_to_do;
8bf62ece 1162 if (block >= dev_sectors)
ae006510 1163 goto out_of_range;
8bf62ece 1164 if ((block + n_block) > dev_sectors)
ae006510 1165 goto out_of_range;
1da177e4 1166
07506697
AL		 1167 if (dev->flags & ATA_DFLAG_LBA) {
1168 tf->flags |= ATA_TFLAG_LBA;
1169
c6a33e24
AL		 1170 if (lba_28_ok(block, n_block)) {
1171 /* use LBA28 */
1172 tf->command = ATA_CMD_VERIFY;
1173 tf->device |= (block >> 24) & 0xf;
1174 } else if (lba_48_ok(block, n_block)) {
1175 if (!(dev->flags & ATA_DFLAG_LBA48))
1176 goto out_of_range;
07506697
AL		 1177
1178 /* use LBA48 */
1179 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1180 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1181
8bf62ece 1182 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1183
8bf62ece
AL		 1184 tf->hob_lbah = (block >> 40) & 0xff;
1185 tf->hob_lbam = (block >> 32) & 0xff;
1186 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1187 } else
1188 /* request too large even for LBA48 */
1189 goto out_of_range;
8bf62ece
AL		 1190
1191 tf->nsect = n_block & 0xff;
1da177e4 1192
8bf62ece
AL		 1193 tf->lbah = (block >> 16) & 0xff;
1194 tf->lbam = (block >> 8) & 0xff;
1195 tf->lbal = block & 0xff;
1da177e4 1196
8bf62ece
AL		 1197 tf->device |= ATA_LBA;
1198 } else {
1199 /* CHS */
1200 u32 sect, head, cyl, track;
1201
c6a33e24
AL		 1202 if (!lba_28_ok(block, n_block))
1203 goto out_of_range;
07506697 1204
8bf62ece
AL		 1205 /* Convert LBA to CHS */
1206 track = (u32)block / dev->sectors;
1207 cyl = track / dev->heads;
1208 head = track % dev->heads;
1209 sect = (u32)block % dev->sectors + 1;
1210
c187c4b5
AL		 1211 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1212 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1213
1214 /* Check whether the converted CHS can fit.
1215 Cylinder: 0-65535
8bf62ece
AL		 1216 Head: 0-15
1217 Sector: 1-255*/
2e9edbf8 1218 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1219 goto out_of_range;
2e9edbf8 1220
8bf62ece
AL		 1221 tf->command = ATA_CMD_VERIFY;
1222 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1223 tf->lbal = sect;
1224 tf->lbam = cyl;
1225 tf->lbah = cyl >> 8;
1226 tf->device |= head;
1227 }
1da177e4
LT		 1228
1229 return 0;
ae006510
DG		 1230
1231invalid_fld:
1232 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1233 /* "Invalid field in cbd" */
1234 return 1;
1235
1236out_of_range:
1237 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1238 /* "Logical Block Address out of range" */
1239 return 1;
1240
1241nothing_to_do:
1242 qc->scsicmd->result = SAM_STAT_GOOD;
1243 return 1;
1da177e4
LT		 1244}
1245
1246/**
1247 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1248 * @qc: Storage for translated ATA taskfile
1249 * @scsicmd: SCSI command to translate
1250 *
1251 * Converts any of six SCSI read/write commands into the
1252 * ATA counterpart, including starting sector (LBA),
1253 * sector count, and taking into account the device's LBA48
1254 * support.
1255 *
1256 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1257 * %WRITE_16 are currently supported.
1258 *
1259 * LOCKING:
cca3974e 1260 * spin_lock_irqsave(host lock)
1da177e4
LT		 1261 *
1262 * RETURNS:
1263 * Zero on success, non-zero on error.
1264 */
1265
057ace5e 1266static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1267{
1268 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1269 struct ata_device *dev = qc->dev;
3aef5231
AL		 1270 u64 block;
1271 u32 n_block;
1da177e4 1272
27197367 1273 qc->flags |= ATA_QCFLAG_IO;
1da177e4 1274 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1da177e4 1275
8cbd6df1
AL		 1276 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1277 scsicmd[0] == WRITE_16)
1da177e4 1278 tf->flags |= ATA_TFLAG_WRITE;
1da177e4 1279
9a3dccc4 1280 /* Calculate the SCSI LBA, transfer length and FUA. */
3aef5231
AL		 1281 switch (scsicmd[0]) {
1282 case READ_10:
1283 case WRITE_10:
1284 scsi_10_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1285 if (unlikely(scsicmd[1] & (1 << 3)))
1286 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1287 break;
1288 case READ_6:
1289 case WRITE_6:
1290 scsi_6_lba_len(scsicmd, &block, &n_block);
c187c4b5
AL		 1291
1292 /* for 6-byte r/w commands, transfer length 0
1293 * means 256 blocks of data, not 0 block.
1294 */
76b2bf9b
JG		 1295 if (!n_block)
1296 n_block = 256;
3aef5231
AL		 1297 break;
1298 case READ_16:
1299 case WRITE_16:
1300 scsi_16_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1301 if (unlikely(scsicmd[1] & (1 << 3)))
1302 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1303 break;
1304 default:
8bf62ece 1305 DPRINTK("no-byte command\n");
ae006510 1306 goto invalid_fld;
1da177e4
LT		 1307 }
1308
8bf62ece
AL		 1309 /* Check and compose ATA command */
1310 if (!n_block)
c187c4b5
AL		 1311 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1312 * length 0 means transfer 0 block of data.
1313 * However, for ATA R/W commands, sector count 0 means
1314 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1315 *
1316 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1317 */
ae006510 1318 goto nothing_to_do;
1da177e4 1319
360f654e
TH		 1320 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1321 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
3dc1d881
TH		 1322 /* yay, NCQ */
1323 if (!lba_48_ok(block, n_block))
1324 goto out_of_range;
1325
1326 tf->protocol = ATA_PROT_NCQ;
1327 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1328
1329 if (tf->flags & ATA_TFLAG_WRITE)
1330 tf->command = ATA_CMD_FPDMA_WRITE;
1331 else
1332 tf->command = ATA_CMD_FPDMA_READ;
1333
1334 qc->nsect = n_block;
1335
1336 tf->nsect = qc->tag << 3;
1337 tf->hob_feature = (n_block >> 8) & 0xff;
1338 tf->feature = n_block & 0xff;
1339
1340 tf->hob_lbah = (block >> 40) & 0xff;
1341 tf->hob_lbam = (block >> 32) & 0xff;
1342 tf->hob_lbal = (block >> 24) & 0xff;
1343 tf->lbah = (block >> 16) & 0xff;
1344 tf->lbam = (block >> 8) & 0xff;
1345 tf->lbal = block & 0xff;
1346
1347 tf->device = 1 << 6;
1348 if (tf->flags & ATA_TFLAG_FUA)
1349 tf->device |= 1 << 7;
1350 } else if (dev->flags & ATA_DFLAG_LBA) {
07506697
AL		 1351 tf->flags |= ATA_TFLAG_LBA;
1352
c6a33e24
AL		 1353 if (lba_28_ok(block, n_block)) {
1354 /* use LBA28 */
1355 tf->device |= (block >> 24) & 0xf;
1356 } else if (lba_48_ok(block, n_block)) {
1357 if (!(dev->flags & ATA_DFLAG_LBA48))
ae006510 1358 goto out_of_range;
1da177e4 1359
07506697
AL		 1360 /* use LBA48 */
1361 tf->flags |= ATA_TFLAG_LBA48;
1362
8bf62ece
AL		 1363 tf->hob_nsect = (n_block >> 8) & 0xff;
1364
1365 tf->hob_lbah = (block >> 40) & 0xff;
1366 tf->hob_lbam = (block >> 32) & 0xff;
1367 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1368 } else
1369 /* request too large even for LBA48 */
1370 goto out_of_range;
c187c4b5 1371
9a3dccc4
TH		 1372 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1373 goto invalid_fld;
8cbd6df1 1374
8bf62ece
AL		 1375 qc->nsect = n_block;
1376 tf->nsect = n_block & 0xff;
1da177e4 1377
8bf62ece
AL		 1378 tf->lbah = (block >> 16) & 0xff;
1379 tf->lbam = (block >> 8) & 0xff;
1380 tf->lbal = block & 0xff;
1da177e4 1381
8bf62ece 1382 tf->device |= ATA_LBA;
2e9edbf8 1383 } else {
8bf62ece
AL		 1384 /* CHS */
1385 u32 sect, head, cyl, track;
1386
1387 /* The request -may- be too large for CHS addressing. */
c6a33e24 1388 if (!lba_28_ok(block, n_block))
ae006510 1389 goto out_of_range;
c187c4b5 1390
9a3dccc4
TH		 1391 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1392 goto invalid_fld;
8cbd6df1 1393
8bf62ece
AL		 1394 /* Convert LBA to CHS */
1395 track = (u32)block / dev->sectors;
1396 cyl = track / dev->heads;
1397 head = track % dev->heads;
1398 sect = (u32)block % dev->sectors + 1;
1399
c187c4b5 1400 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
8bf62ece 1401 (u32)block, track, cyl, head, sect);
c187c4b5 1402
2e9edbf8
JG		 1403 /* Check whether the converted CHS can fit.
1404 Cylinder: 0-65535
8bf62ece
AL		 1405 Head: 0-15
1406 Sector: 1-255*/
c187c4b5 1407 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1408 goto out_of_range;
c187c4b5 1409
8bf62ece
AL		 1410 qc->nsect = n_block;
1411 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1412 tf->lbal = sect;
1413 tf->lbam = cyl;
1414 tf->lbah = cyl >> 8;
1415 tf->device |= head;
1da177e4
LT		 1416 }
1417
8bf62ece 1418 return 0;
ae006510
DG		 1419
1420invalid_fld:
1421 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1422 /* "Invalid field in cbd" */
1423 return 1;
1424
1425out_of_range:
1426 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1427 /* "Logical Block Address out of range" */
1428 return 1;
1429
1430nothing_to_do:
1431 qc->scsicmd->result = SAM_STAT_GOOD;
1432 return 1;
1da177e4
LT		 1433}
1434
77853bf2 1435static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1436{
c31f571d 1437 struct ata_port *ap = qc->ap;
1da177e4 1438 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1439 u8 *cdb = cmd->cmnd;
a22e2eb0 1440 int need_sense = (qc->err_mask != 0);
b095518e 1441
3057ac3c 1442 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1443 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1444 * cache
1445 */
c31f571d
TH		 1446 if (ap->ops->error_handler &&
1447 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
3057ac3c 1448 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1449 (qc->tf.feature == SETFEATURES_WC_OFF))) {
c31f571d
TH		 1450 ap->eh_info.action |= ATA_EH_REVALIDATE;
1451 ata_port_schedule_eh(ap);
3057ac3c 1452 }
1453
b095518e
JG		 1454 /* For ATA pass thru (SAT) commands, generate a sense block if
1455 * user mandated it or if there's an error. Note that if we
1456 * generate because the user forced us to, a check condition
1457 * is generated and the ATA register values are returned
1458 * whether the command completed successfully or not. If there
1459 * was no error, SK, ASC and ASCQ will all be zero.
1460 */
a7dac447
JG		 1461 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1462 ((cdb[2] & 0x20) || need_sense)) {
b095518e
JG		 1463 ata_gen_ata_desc_sense(qc);
1464 } else {
1465 if (!need_sense) {
1466 cmd->result = SAM_STAT_GOOD;
1467 } else {
1468 /* TODO: decide which descriptor format to use
1469 * for 48b LBA devices and call that here
1470 * instead of the fixed desc, which is only
1471 * good for smaller LBA (and maybe CHS?)
1472 * devices.
1473 */
1474 ata_gen_fixed_sense(qc);
1475 }
1476 }
1da177e4 1477
c31f571d
TH		 1478 if (need_sense && !ap->ops->error_handler)
1479 ata_dump_status(ap->id, &qc->result_tf);
1da177e4
LT		 1480
1481 qc->scsidone(cmd);
1482
77853bf2 1483 ata_qc_free(qc);
1da177e4
LT		 1484}
1485
3dc1d881
TH		 1486/**
1487 * ata_scmd_need_defer - Check whether we need to defer scmd
1488 * @dev: ATA device to which the command is addressed
1489 * @is_io: Is the command IO (and thus possibly NCQ)?
1490 *
1491 * NCQ and non-NCQ commands cannot run together. As upper layer
1492 * only knows the queue depth, we are responsible for maintaining
1493 * exclusion. This function checks whether a new command can be
1494 * issued to @dev.
1495 *
1496 * LOCKING:
cca3974e 1497 * spin_lock_irqsave(host lock)
3dc1d881
TH		 1498 *
1499 * RETURNS:
1500 * 1 if deferring is needed, 0 otherwise.
1501 */
1502static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1503{
1504 struct ata_port *ap = dev->ap;
1505
1506 if (!(dev->flags & ATA_DFLAG_NCQ))
1507 return 0;
1508
1509 if (is_io) {
1510 if (!ata_tag_valid(ap->active_tag))
1511 return 0;
1512 } else {
1513 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1514 return 0;
1515 }
1516 return 1;
1517}
1518
1da177e4
LT		 1519/**
1520 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1521 * @dev: ATA device to which the command is addressed
1522 * @cmd: SCSI command to execute
1523 * @done: SCSI command completion function
1524 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1525 *
1526 * Our ->queuecommand() function has decided that the SCSI
1527 * command issued can be directly translated into an ATA
1528 * command, rather than handled internally.
1529 *
1530 * This function sets up an ata_queued_cmd structure for the
1531 * SCSI command, and sends that ata_queued_cmd to the hardware.
1532 *
ae006510
DG		 1533 * The xlat_func argument (actor) returns 0 if ready to execute
1534 * ATA command, else 1 to finish translation. If 1 is returned
1535 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1536 * to be set reflecting an error condition or clean (early)
1537 * termination.
1538 *
1da177e4 1539 * LOCKING:
cca3974e 1540 * spin_lock_irqsave(host lock)
2115ea94
TH		 1541 *
1542 * RETURNS:
1543 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1544 * needs to be deferred.
1da177e4 1545 */
2115ea94
TH		 1546static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1547 void (*done)(struct scsi_cmnd *),
1548 ata_xlat_func_t xlat_func)
1da177e4
LT		 1549{
1550 struct ata_queued_cmd *qc;
1551 u8 *scsicmd = cmd->cmnd;
3dc1d881 1552 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1553
1554 VPRINTK("ENTER\n");
1555
3dc1d881
TH		 1556 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1557 goto defer;
1558
3373efd8 1559 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1560 if (!qc)
ae006510 1561 goto err_mem;
1da177e4
LT		 1562
1563 /* data is present; dma-map it */
be7db055 1564 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1565 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1566 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1567 ata_dev_printk(dev, KERN_WARNING,
1568 "WARNING: zero len r/w req\n");
ae006510 1569 goto err_did;
1da177e4
LT		 1570 }
1571
1572 if (cmd->use_sg)
1573 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1574 else
1575 ata_sg_init_one(qc, cmd->request_buffer,
1576 cmd->request_bufflen);
1577
1578 qc->dma_dir = cmd->sc_data_direction;
1579 }
1580
1581 qc->complete_fn = ata_scsi_qc_complete;
1582
1583 if (xlat_func(qc, scsicmd))
ae006510 1584 goto early_finish;
1da177e4
LT		 1585
1586 /* select device, send command to hardware */
8e0e694a 1587 ata_qc_issue(qc);
1da177e4
LT		 1588
1589 VPRINTK("EXIT\n");
2115ea94 1590 return 0;
1da177e4 1591
ae006510
DG		 1592early_finish:
1593 ata_qc_free(qc);
1594 done(cmd);
1595 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1596 return 0;
ae006510
DG		 1597
1598err_did:
1da177e4 1599 ata_qc_free(qc);
ae006510
DG		 1600 cmd->result = (DID_ERROR << 16);
1601 done(cmd);
253b92ec 1602err_mem:
ae006510 1603 DPRINTK("EXIT - internal\n");
2115ea94 1604 return 0;
3dc1d881
TH		 1605
1606defer:
1607 DPRINTK("EXIT - defer\n");
1608 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1609}
1610
1611/**
1612 * ata_scsi_rbuf_get - Map response buffer.
1613 * @cmd: SCSI command containing buffer to be mapped.
1614 * @buf_out: Pointer to mapped area.
1615 *
1616 * Maps buffer contained within SCSI command @cmd.
1617 *
1618 * LOCKING:
cca3974e 1619 * spin_lock_irqsave(host lock)
1da177e4
LT		 1620 *
1621 * RETURNS:
1622 * Length of response buffer.
1623 */
1624
1625static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1626{
1627 u8 *buf;
1628 unsigned int buflen;
1629
1630 if (cmd->use_sg) {
1631 struct scatterlist *sg;
1632
1633 sg = (struct scatterlist *) cmd->request_buffer;
1634 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1635 buflen = sg->length;
1636 } else {
1637 buf = cmd->request_buffer;
1638 buflen = cmd->request_bufflen;
1639 }
1640
1641 *buf_out = buf;
1642 return buflen;
1643}
1644
1645/**
1646 * ata_scsi_rbuf_put - Unmap response buffer.
1647 * @cmd: SCSI command containing buffer to be unmapped.
1648 * @buf: buffer to unmap
1649 *
1650 * Unmaps response buffer contained within @cmd.
1651 *
1652 * LOCKING:
cca3974e 1653 * spin_lock_irqsave(host lock)
1da177e4
LT		 1654 */
1655
1656static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1657{
1658 if (cmd->use_sg) {
1659 struct scatterlist *sg;
1660
1661 sg = (struct scatterlist *) cmd->request_buffer;
1662 kunmap_atomic(buf - sg->offset, KM_USER0);
1663 }
1664}
1665
1666/**
1667 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1668 * @args: device IDENTIFY data / SCSI command of interest.
1669 * @actor: Callback hook for desired SCSI command simulator
1670 *
1671 * Takes care of the hard work of simulating a SCSI command...
1672 * Mapping the response buffer, calling the command's handler,
1673 * and handling the handler's return value. This return value
1674 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1675 * completed successfully (0), or not (in which case cmd->result
1676 * and sense buffer are assumed to be set).
1da177e4
LT		 1677 *
1678 * LOCKING:
cca3974e 1679 * spin_lock_irqsave(host lock)
1da177e4
LT		 1680 */
1681
1682void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1683 unsigned int (*actor) (struct ata_scsi_args *args,
1684 u8 *rbuf, unsigned int buflen))
1685{
1686 u8 *rbuf;
1687 unsigned int buflen, rc;
1688 struct scsi_cmnd *cmd = args->cmd;
1689
1690 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1691 memset(rbuf, 0, buflen);
1692 rc = actor(args, rbuf, buflen);
1693 ata_scsi_rbuf_put(cmd, rbuf);
1694
ae006510 1695 if (rc == 0)
1da177e4 1696 cmd->result = SAM_STAT_GOOD;
ae006510 1697 args->done(cmd);
1da177e4
LT		 1698}
1699
1700/**
1701 * ata_scsiop_inq_std - Simulate INQUIRY command
1702 * @args: device IDENTIFY data / SCSI command of interest.
1703 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1704 * @buflen: Response buffer length.
1705 *
1706 * Returns standard device identification data associated
b142eb65 1707 * with non-VPD INQUIRY command output.
1da177e4
LT		 1708 *
1709 * LOCKING:
cca3974e 1710 * spin_lock_irqsave(host lock)
1da177e4
LT		 1711 */
1712
1713unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1714 unsigned int buflen)
1715{
1716 u8 hdr[] = {
1717 TYPE_DISK,
1718 0,
1719 0x5, /* claim SPC-3 version compatibility */
1720 2,
1721 95 - 4
1722 };
1723
1724 /* set scsi removeable (RMB) bit per ata bit */
1725 if (ata_id_removeable(args->id))
1726 hdr[1] |= (1 << 7);
1727
1728 VPRINTK("ENTER\n");
1729
1730 memcpy(rbuf, hdr, sizeof(hdr));
1731
1732 if (buflen > 35) {
1733 memcpy(&rbuf[8], "ATA ", 8);
6a62a04d
TH		 1734 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1735 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1da177e4
LT		 1736 if (rbuf[32] == 0 || rbuf[32] == ' ')
1737 memcpy(&rbuf[32], "n/a ", 4);
1738 }
1739
1740 if (buflen > 63) {
1741 const u8 versions[] = {
1742 0x60, /* SAM-3 (no version claimed) */
1743
1744 0x03,
1745 0x20, /* SBC-2 (no version claimed) */
1746
1747 0x02,
1748 0x60 /* SPC-3 (no version claimed) */
1749 };
1750
1751 memcpy(rbuf + 59, versions, sizeof(versions));
1752 }
1753
1754 return 0;
1755}
1756
1757/**
b142eb65 1758 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1759 * @args: device IDENTIFY data / SCSI command of interest.
1760 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1761 * @buflen: Response buffer length.
1762 *
b142eb65 1763 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1764 *
1765 * LOCKING:
cca3974e 1766 * spin_lock_irqsave(host lock)
1da177e4
LT		 1767 */
1768
1769unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1770 unsigned int buflen)
1771{
1772 const u8 pages[] = {
1773 0x00, /* page 0x00, this page */
1774 0x80, /* page 0x80, unit serial no page */
1775 0x83 /* page 0x83, device ident page */
1776 };
b142eb65 1777 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1778
1779 if (buflen > 6)
1780 memcpy(rbuf + 4, pages, sizeof(pages));
1781
1782 return 0;
1783}
1784
1785/**
b142eb65 1786 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1787 * @args: device IDENTIFY data / SCSI command of interest.
1788 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1789 * @buflen: Response buffer length.
1790 *
1791 * Returns ATA device serial number.
1792 *
1793 * LOCKING:
cca3974e 1794 * spin_lock_irqsave(host lock)
1da177e4
LT		 1795 */
1796
1797unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1798 unsigned int buflen)
1799{
1800 const u8 hdr[] = {
1801 0,
1802 0x80, /* this page code */
1803 0,
1804 ATA_SERNO_LEN, /* page len */
1805 };
1806 memcpy(rbuf, hdr, sizeof(hdr));
1807
1808 if (buflen > (ATA_SERNO_LEN + 4 - 1))
6a62a04d
TH		 1809 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1810 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1da177e4
LT		 1811
1812 return 0;
1813}
1814
1da177e4 1815/**
b142eb65 1816 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1817 * @args: device IDENTIFY data / SCSI command of interest.
1818 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1819 * @buflen: Response buffer length.
1820 *
b142eb65
JG		 1821 * Yields two logical unit device identification designators:
1822 * - vendor specific ASCII containing the ATA serial number
1823 * - SAT defined "t10 vendor id based" containing ASCII vendor
1824 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1825 *
1826 * LOCKING:
cca3974e 1827 * spin_lock_irqsave(host lock)
1da177e4
LT		 1828 */
1829
1830unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1831 unsigned int buflen)
1832{
b142eb65
JG		 1833 int num;
1834 const int sat_model_serial_desc_len = 68;
1835 const int ata_model_byte_len = 40;
1da177e4 1836
b142eb65
JG		 1837 rbuf[1] = 0x83; /* this page code */
1838 num = 4;
1839
1840 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1841 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1842 rbuf[num + 0] = 2;
b142eb65
JG		 1843 rbuf[num + 3] = ATA_SERNO_LEN;
1844 num += 4;
1845 ata_id_string(args->id, (unsigned char *) rbuf + num,
1846 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1847 num += ATA_SERNO_LEN;
1da177e4 1848 }
b142eb65
JG		 1849 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1850 /* SAT defined lu model and serial numbers descriptor */
1851 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1852 rbuf[num + 0] = 2;
1853 rbuf[num + 1] = 1;
b142eb65
JG		 1854 rbuf[num + 3] = sat_model_serial_desc_len;
1855 num += 4;
1856 memcpy(rbuf + num, "ATA ", 8);
1857 num += 8;
1858 ata_id_string(args->id, (unsigned char *) rbuf + num,
1859 ATA_ID_PROD_OFS, ata_model_byte_len);
1860 num += ata_model_byte_len;
1861 ata_id_string(args->id, (unsigned char *) rbuf + num,
1862 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1863 num += ATA_SERNO_LEN;
1864 }
1865 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1866 return 0;
1867}
1868
1869/**
0cba632b 1870 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1871 * @args: device IDENTIFY data / SCSI command of interest.
1872 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1873 * @buflen: Response buffer length.
1874 *
1875 * No operation. Simply returns success to caller, to indicate
1876 * that the caller should successfully complete this SCSI command.
1877 *
1878 * LOCKING:
cca3974e 1879 * spin_lock_irqsave(host lock)
1da177e4
LT		 1880 */
1881
1882unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1883 unsigned int buflen)
1884{
1885 VPRINTK("ENTER\n");
1886 return 0;
1887}
1888
1889/**
1890 * ata_msense_push - Push data onto MODE SENSE data output buffer
1891 * @ptr_io: (input/output) Location to store more output data
1892 * @last: End of output data buffer
1893 * @buf: Pointer to BLOB being added to output buffer
1894 * @buflen: Length of BLOB
1895 *
1896 * Store MODE SENSE data on an output buffer.
1897 *
1898 * LOCKING:
1899 * None.
1900 */
1901
1902static void ata_msense_push(u8 **ptr_io, const u8 *last,
1903 const u8 *buf, unsigned int buflen)
1904{
1905 u8 *ptr = *ptr_io;
1906
1907 if ((ptr + buflen - 1) > last)
1908 return;
1909
1910 memcpy(ptr, buf, buflen);
1911
1912 ptr += buflen;
1913
1914 *ptr_io = ptr;
1915}
1916
1917/**
1918 * ata_msense_caching - Simulate MODE SENSE caching info page
1919 * @id: device IDENTIFY data
1920 * @ptr_io: (input/output) Location to store more output data
1921 * @last: End of output data buffer
1922 *
1923 * Generate a caching info page, which conditionally indicates
1924 * write caching to the SCSI layer, depending on device
1925 * capabilities.
1926 *
1927 * LOCKING:
1928 * None.
1929 */
1930
1931static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1932 const u8 *last)
1933{
00ac37f5 1934 u8 page[CACHE_MPAGE_LEN];
1da177e4 1935
00ac37f5 1936 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1937 if (ata_id_wcache_enabled(id))
1938 page[2] |= (1 << 2); /* write cache enable */
1939 if (!ata_id_rahead_enabled(id))
1940 page[12] |= (1 << 5); /* disable read ahead */
1941
1942 ata_msense_push(ptr_io, last, page, sizeof(page));
1943 return sizeof(page);
1944}
1945
1946/**
1947 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1948 * @dev: Device associated with this MODE SENSE command
1949 * @ptr_io: (input/output) Location to store more output data
1950 * @last: End of output data buffer
1951 *
1952 * Generate a generic MODE SENSE control mode page.
1953 *
1954 * LOCKING:
1955 * None.
1956 */
1957
1958static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1959{
00ac37f5
DG		 1960 ata_msense_push(ptr_io, last, def_control_mpage,
1961 sizeof(def_control_mpage));
1962 return sizeof(def_control_mpage);
1da177e4
LT		 1963}
1964
1965/**
1966 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1967 * @dev: Device associated with this MODE SENSE command
1968 * @ptr_io: (input/output) Location to store more output data
1969 * @last: End of output data buffer
1970 *
1971 * Generate a generic MODE SENSE r/w error recovery page.
1972 *
1973 * LOCKING:
1974 * None.
1975 */
1976
1977static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1978{
1da177e4 1979
00ac37f5
DG		 1980 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1981 sizeof(def_rw_recovery_mpage));
1982 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1983}
1984
48bdc8ec
JA		 1985/*
1986 * We can turn this into a real blacklist if it's needed, for now just
1987 * blacklist any Maxtor BANC1G10 revision firmware
1988 */
1989static int ata_dev_supports_fua(u16 *id)
1990{
1991 unsigned char model[41], fw[9];
1992
c3c013a2
JG		 1993 if (!libata_fua)
1994 return 0;
48bdc8ec
JA		 1995 if (!ata_id_has_fua(id))
1996 return 0;
1997
6a62a04d
TH		 1998 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1999 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
48bdc8ec 2000
2e02671d 2001 if (strcmp(model, "Maxtor"))
48bdc8ec 2002 return 1;
2e02671d 2003 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2004 return 1;
2005
2006 return 0; /* blacklisted */
2007}
2008
1da177e4
LT		 2009/**
2010 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2011 * @args: device IDENTIFY data / SCSI command of interest.
2012 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2013 * @buflen: Response buffer length.
2014 *
00ac37f5
DG		 2015 * Simulate MODE SENSE commands. Assume this is invoked for direct
2016 * access devices (e.g. disks) only. There should be no block
2017 * descriptor for other device types.
1da177e4
LT		 2018 *
2019 * LOCKING:
cca3974e 2020 * spin_lock_irqsave(host lock)
1da177e4
LT		 2021 */
2022
2023unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2024 unsigned int buflen)
2025{
9a3dccc4 2026 struct ata_device *dev = args->dev;
1da177e4 2027 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2028 const u8 sat_blk_desc[] = {
2029 0, 0, 0, 0, /* number of blocks: sat unspecified */
2030 0,
2031 0, 0x2, 0x0 /* block length: 512 bytes */
2032 };
2033 u8 pg, spg;
2034 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2035 u8 dpofua;
1da177e4
LT		 2036
2037 VPRINTK("ENTER\n");
2038
2039 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2040 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2041 /*
2042 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2043 */
00ac37f5 2044
1da177e4 2045 page_control = scsicmd[2] >> 6;
ae006510
DG		 2046 switch (page_control) {
2047 case 0: /* current */
2048 break; /* supported */
2049 case 3: /* saved */
2050 goto saving_not_supp;
2051 case 1: /* changeable */
2052 case 2: /* defaults */
2053 default:
2054 goto invalid_fld;
2055 }
1da177e4 2056
00ac37f5
DG		 2057 if (six_byte) {
2058 output_len = 4 + (ebd ? 8 : 0);
2059 alloc_len = scsicmd[4];
2060 } else {
2061 output_len = 8 + (ebd ? 8 : 0);
2062 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2063 }
2064 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2065
2066 p = rbuf + output_len;
00ac37f5 2067 last = rbuf + minlen - 1;
1da177e4 2068
00ac37f5
DG		 2069 pg = scsicmd[2] & 0x3f;
2070 spg = scsicmd[3];
2071 /*
2072 * No mode subpages supported (yet) but asking for _all_
2073 * subpages may be valid
2074 */
2075 if (spg && (spg != ALL_SUB_MPAGES))
2076 goto invalid_fld;
2077
2078 switch(pg) {
2079 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2080 output_len += ata_msense_rw_recovery(&p, last);
2081 break;
2082
00ac37f5 2083 case CACHE_MPAGE:
1da177e4
LT		 2084 output_len += ata_msense_caching(args->id, &p, last);
2085 break;
2086
00ac37f5 2087 case CONTROL_MPAGE: {
1da177e4
LT		 2088 output_len += ata_msense_ctl_mode(&p, last);
2089 break;
2090 }
2091
00ac37f5 2092 case ALL_MPAGES:
1da177e4
LT		 2093 output_len += ata_msense_rw_recovery(&p, last);
2094 output_len += ata_msense_caching(args->id, &p, last);
2095 output_len += ata_msense_ctl_mode(&p, last);
2096 break;
2097
2098 default: /* invalid page code */
ae006510 2099 goto invalid_fld;
1da177e4
LT		 2100 }
2101
00ac37f5
DG		 2102 if (minlen < 1)
2103 return 0;
9a3dccc4
TH		 2104
2105 dpofua = 0;
f79d409f 2106 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2107 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2108 dpofua = 1 << 4;
2109
1da177e4
LT		 2110 if (six_byte) {
2111 output_len--;
2112 rbuf[0] = output_len;
9a3dccc4
TH		 2113 if (minlen > 2)
2114 rbuf[2] |= dpofua;
00ac37f5
DG		 2115 if (ebd) {
2116 if (minlen > 3)
2117 rbuf[3] = sizeof(sat_blk_desc);
2118 if (minlen > 11)
2119 memcpy(rbuf + 4, sat_blk_desc,
2120 sizeof(sat_blk_desc));
2121 }
1da177e4
LT		 2122 } else {
2123 output_len -= 2;
2124 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2125 if (minlen > 1)
2126 rbuf[1] = output_len;
9a3dccc4
TH		 2127 if (minlen > 3)
2128 rbuf[3] |= dpofua;
00ac37f5
DG		 2129 if (ebd) {
2130 if (minlen > 7)
2131 rbuf[7] = sizeof(sat_blk_desc);
2132 if (minlen > 15)
2133 memcpy(rbuf + 8, sat_blk_desc,
2134 sizeof(sat_blk_desc));
2135 }
1da177e4 2136 }
1da177e4 2137 return 0;
ae006510
DG		 2138
2139invalid_fld:
2140 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2141 /* "Invalid field in cbd" */
2142 return 1;
2143
2144saving_not_supp:
2145 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2146 /* "Saving parameters not supported" */
2147 return 1;
1da177e4
LT		 2148}
2149
2150/**
2151 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2152 * @args: device IDENTIFY data / SCSI command of interest.
2153 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2154 * @buflen: Response buffer length.
2155 *
2156 * Simulate READ CAPACITY commands.
2157 *
2158 * LOCKING:
cca3974e 2159 * spin_lock_irqsave(host lock)
1da177e4
LT		 2160 */
2161
2162unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2163 unsigned int buflen)
2164{
2165 u64 n_sectors;
2166 u32 tmp;
2167
2168 VPRINTK("ENTER\n");
2169
8bf62ece
AL		 2170 if (ata_id_has_lba(args->id)) {
2171 if (ata_id_has_lba48(args->id))
2172 n_sectors = ata_id_u64(args->id, 100);
2173 else
2174 n_sectors = ata_id_u32(args->id, 60);
2175 } else {
2176 /* CHS default translation */
2177 n_sectors = args->id[1] * args->id[3] * args->id[6];
2178
2179 if (ata_id_current_chs_valid(args->id))
2180 /* CHS current translation */
2181 n_sectors = ata_id_u32(args->id, 57);
2182 }
2183
1da177e4
LT		 2184 n_sectors--; /* ATA TotalUserSectors - 1 */
2185
1da177e4 2186 if (args->cmd->cmnd[0] == READ_CAPACITY) {
0c144d0d
PP		 2187 if( n_sectors >= 0xffffffffULL )
2188 tmp = 0xffffffff ; /* Return max count on overflow */
2189 else
2190 tmp = n_sectors ;
2191
1da177e4
LT		 2192 /* sector count, 32-bit */
2193 rbuf[0] = tmp >> (8 * 3);
2194 rbuf[1] = tmp >> (8 * 2);
2195 rbuf[2] = tmp >> (8 * 1);
2196 rbuf[3] = tmp;
2197
2198 /* sector size */
2199 tmp = ATA_SECT_SIZE;
2200 rbuf[6] = tmp >> 8;
2201 rbuf[7] = tmp;
2202
2203 } else {
2204 /* sector count, 64-bit */
0c144d0d
PP		 2205 tmp = n_sectors >> (8 * 4);
2206 rbuf[2] = tmp >> (8 * 3);
2207 rbuf[3] = tmp >> (8 * 2);
2208 rbuf[4] = tmp >> (8 * 1);
2209 rbuf[5] = tmp;
2210 tmp = n_sectors;
1da177e4
LT		 2211 rbuf[6] = tmp >> (8 * 3);
2212 rbuf[7] = tmp >> (8 * 2);
2213 rbuf[8] = tmp >> (8 * 1);
2214 rbuf[9] = tmp;
2215
2216 /* sector size */
2217 tmp = ATA_SECT_SIZE;
2218 rbuf[12] = tmp >> 8;
2219 rbuf[13] = tmp;
2220 }
2221
2222 return 0;
2223}
2224
2225/**
2226 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2227 * @args: device IDENTIFY data / SCSI command of interest.
2228 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2229 * @buflen: Response buffer length.
2230 *
2231 * Simulate REPORT LUNS command.
2232 *
2233 * LOCKING:
cca3974e 2234 * spin_lock_irqsave(host lock)
1da177e4
LT		 2235 */
2236
2237unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2238 unsigned int buflen)
2239{
2240 VPRINTK("ENTER\n");
2241 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2242
2243 return 0;
2244}
2245
845c5834
DG		 2246/**
2247 * ata_scsi_set_sense - Set SCSI sense data and status
2248 * @cmd: SCSI request to be handled
2249 * @sk: SCSI-defined sense key
2250 * @asc: SCSI-defined additional sense code
2251 * @ascq: SCSI-defined additional sense code qualifier
2252 *
2253 * Helper function that builds a valid fixed format, current
2254 * response code and the given sense key (sk), additional sense
2255 * code (asc) and additional sense code qualifier (ascq) with
2256 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2257 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2258 *
2259 * LOCKING:
2260 * Not required
2261 */
2262
2263void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2264{
2265 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2266
2267 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2268 cmd->sense_buffer[2] = sk;
2269 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2270 cmd->sense_buffer[12] = asc;
2271 cmd->sense_buffer[13] = ascq;
2272}
2273
1da177e4
LT		 2274/**
2275 * ata_scsi_badcmd - End a SCSI request with an error
2276 * @cmd: SCSI request to be handled
2277 * @done: SCSI command completion function
2278 * @asc: SCSI-defined additional sense code
2279 * @ascq: SCSI-defined additional sense code qualifier
2280 *
2281 * Helper function that completes a SCSI command with
2282 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2283 * and the specified additional sense codes.
2284 *
2285 * LOCKING:
cca3974e 2286 * spin_lock_irqsave(host lock)
1da177e4
LT		 2287 */
2288
2289void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2290{
2291 DPRINTK("ENTER\n");
ae006510 2292 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2293
2294 done(cmd);
2295}
2296
77853bf2 2297static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2298{
74e6c8c3 2299 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2300 /* FIXME: not quite right; we don't want the
2301 * translation of taskfile registers into
2302 * a sense descriptors, since that's only
2303 * correct for ATA, not ATAPI
2304 */
2305 ata_gen_ata_desc_sense(qc);
74e6c8c3 2306 }
a939c963 2307
c6e6e666 2308 qc->scsidone(qc->scsicmd);
77853bf2 2309 ata_qc_free(qc);
c6e6e666 2310}
a939c963 2311
c6e6e666
JG		 2312/* is it pointless to prefer PIO for "safety reasons"? */
2313static inline int ata_pio_use_silly(struct ata_port *ap)
2314{
2315 return (ap->flags & ATA_FLAG_PIO_DMA);
2316}
2317
2318static void atapi_request_sense(struct ata_queued_cmd *qc)
2319{
2320 struct ata_port *ap = qc->ap;
2321 struct scsi_cmnd *cmd = qc->scsicmd;
2322
2323 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2324
2325 /* FIXME: is this needed? */
2326 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2327
c6e6e666
JG		 2328 ap->ops->tf_read(ap, &qc->tf);
2329
2330 /* fill these in, for the case where they are -not- overwritten */
2331 cmd->sense_buffer[0] = 0x70;
2332 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2333
2334 ata_qc_reinit(qc);
2335
a939c963
JG		 2336 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2337 qc->dma_dir = DMA_FROM_DEVICE;
2338
6e7846e9 2339 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2340 qc->cdb[0] = REQUEST_SENSE;
2341 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2342
2343 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2344 qc->tf.command = ATA_CMD_PACKET;
2345
c6e6e666
JG		 2346 if (ata_pio_use_silly(ap)) {
2347 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2348 qc->tf.feature |= ATAPI_PKT_DMA;
2349 } else {
2350 qc->tf.protocol = ATA_PROT_ATAPI;
2351 qc->tf.lbam = (8 * 1024) & 0xff;
2352 qc->tf.lbah = (8 * 1024) >> 8;
2353 }
a939c963
JG		 2354 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2355
c6e6e666 2356 qc->complete_fn = atapi_sense_complete;
a939c963 2357
8e0e694a 2358 ata_qc_issue(qc);
a939c963
JG		 2359
2360 DPRINTK("EXIT\n");
2361}
2362
77853bf2 2363static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2364{
2365 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2366 unsigned int err_mask = qc->err_mask;
1da177e4 2367
a7dac447 2368 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2369
246619da
TH		 2370 /* handle completion from new EH */
2371 if (unlikely(qc->ap->ops->error_handler &&
2372 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2373
2374 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2375 /* FIXME: not quite right; we don't want the
2376 * translation of taskfile registers into a
2377 * sense descriptors, since that's only
2378 * correct for ATA, not ATAPI
2379 */
2380 ata_gen_ata_desc_sense(qc);
2381 }
2382
22aac089
TH		 2383 /* SCSI EH automatically locks door if sdev->locked is
2384 * set. Sometimes door lock request continues to
2385 * fail, for example, when no media is present. This
2386 * creates a loop - SCSI EH issues door lock which
2387 * fails and gets invoked again to acquire sense data
2388 * for the failed command.
2389 *
2390 * If door lock fails, always clear sdev->locked to
2391 * avoid this infinite loop.
2392 */
2393 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2394 qc->dev->sdev->locked = 0;
2395
246619da
TH		 2396 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2397 qc->scsidone(cmd);
2398 ata_qc_free(qc);
2399 return;
2400 }
2401
2402 /* successful completion or old EH failure path */
a7dac447 2403 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2404 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2405 atapi_request_sense(qc);
77853bf2 2406 return;
74e6c8c3 2407 } else if (unlikely(err_mask)) {
a7dac447
JG		 2408 /* FIXME: not quite right; we don't want the
2409 * translation of taskfile registers into
2410 * a sense descriptors, since that's only
2411 * correct for ATA, not ATAPI
2412 */
2413 ata_gen_ata_desc_sense(qc);
74e6c8c3 2414 } else {
1da177e4
LT		 2415 u8 *scsicmd = cmd->cmnd;
2416
fd71da46 2417 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2418 u8 *buf = NULL;
2419 unsigned int buflen;
2420
2421 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2422
2423 /* ATAPI devices typically report zero for their SCSI version,
2424 * and sometimes deviate from the spec WRT response data
2425 * format. If SCSI version is reported as zero like normal,
2426 * then we make the following fixups: 1) Fake MMC-5 version,
2427 * to indicate to the Linux scsi midlayer this is a modern
2428 * device. 2) Ensure response data format / ATAPI information
2429 * are always correct.
a15dbeb4
JG		 2430 */
2431 if (buf[2] == 0) {
2432 buf[2] = 0x5;
2433 buf[3] = 0x32;
2434 }
2435
1da177e4
LT		 2436 ata_scsi_rbuf_put(cmd, buf);
2437 }
a15dbeb4 2438
1da177e4
LT		 2439 cmd->result = SAM_STAT_GOOD;
2440 }
2441
2442 qc->scsidone(cmd);
77853bf2 2443 ata_qc_free(qc);
1da177e4
LT		 2444}
2445/**
2446 * atapi_xlat - Initialize PACKET taskfile
2447 * @qc: command structure to be initialized
2448 * @scsicmd: SCSI CDB associated with this PACKET command
2449 *
2450 * LOCKING:
cca3974e 2451 * spin_lock_irqsave(host lock)
1da177e4
LT		 2452 *
2453 * RETURNS:
2454 * Zero on success, non-zero on failure.
2455 */
2456
057ace5e 2457static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 2458{
2459 struct scsi_cmnd *cmd = qc->scsicmd;
2460 struct ata_device *dev = qc->dev;
2461 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db055 2462 int nodata = (cmd->sc_data_direction == DMA_NONE);
1da177e4
LT		 2463
2464 if (!using_pio)
2465 /* Check whether ATAPI DMA is safe */
2466 if (ata_check_atapi_dma(qc))
2467 using_pio = 1;
2468
6e7846e9 2469 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
1da177e4
LT		 2470
2471 qc->complete_fn = atapi_qc_complete;
2472
2473 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db055 2474 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2475 qc->tf.flags |= ATA_TFLAG_WRITE;
2476 DPRINTK("direction: write\n");
2477 }
2478
2479 qc->tf.command = ATA_CMD_PACKET;
2480
2481 /* no data, or PIO data xfer */
2482 if (using_pio || nodata) {
2483 if (nodata)
2484 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2485 else
2486 qc->tf.protocol = ATA_PROT_ATAPI;
2487 qc->tf.lbam = (8 * 1024) & 0xff;
2488 qc->tf.lbah = (8 * 1024) >> 8;
2489 }
2490
2491 /* DMA data xfer */
2492 else {
2493 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2494 qc->tf.feature |= ATAPI_PKT_DMA;
2495
95de719a
AL		 2496 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2497 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2498 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2499 }
2500
5d5ff44f 2501 qc->nbytes = cmd->request_bufflen;
1da177e4
LT		 2502
2503 return 0;
2504}
2505
ab5b3a5b
TH		 2506static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2507{
2508 if (likely(id < ATA_MAX_DEVICES))
2509 return &ap->device[id];
2510 return NULL;
2511}
2512
2513static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2514 const struct scsi_device *scsidev)
2515{
2516 /* skip commands not addressed to targets we simulate */
2517 if (unlikely(scsidev->channel || scsidev->lun))
2518 return NULL;
2519
2520 return ata_find_dev(ap, scsidev->id);
2521}
2522
99ba9e09
BK		 2523/**
2524 * ata_scsi_dev_enabled - determine if device is enabled
2525 * @dev: ATA device
2526 *
2527 * Determine if commands should be sent to the specified device.
2528 *
2529 * LOCKING:
cca3974e 2530 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2531 *
2532 * RETURNS:
2533 * 0 if commands are not allowed / 1 if commands are allowed
2534 */
2535
2536static int ata_scsi_dev_enabled(struct ata_device *dev)
2537{
2538 if (unlikely(!ata_dev_enabled(dev)))
2539 return 0;
2540
2541 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2542 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2543 ata_dev_printk(dev, KERN_WARNING,
2544 "WARNING: ATAPI is %s, device ignored.\n",
2545 atapi_enabled ? "not supported with this driver" : "disabled");
2546 return 0;
2547 }
2548 }
2549
2550 return 1;
2551}
2552
1da177e4
LT		 2553/**
2554 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2555 * @ap: ATA port to which the device is attached
2556 * @scsidev: SCSI device from which we derive the ATA device
2557 *
2558 * Given various information provided in struct scsi_cmnd,
2559 * map that onto an ATA bus, and using that mapping
2560 * determine which ata_device is associated with the
2561 * SCSI command to be sent.
2562 *
2563 * LOCKING:
cca3974e 2564 * spin_lock_irqsave(host lock)
1da177e4
LT		 2565 *
2566 * RETURNS:
2567 * Associated ATA device, or %NULL if not found.
2568 */
1da177e4 2569static struct ata_device *
057ace5e 2570ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2571{
ab5b3a5b 2572 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2573
99ba9e09 2574 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2575 return NULL;
2576
1da177e4
LT		 2577 return dev;
2578}
2579
b095518e
JG		 2580/*
2581 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2582 * @byte1: Byte 1 from pass-thru CDB.
2583 *
2584 * RETURNS:
2585 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2586 */
2587static u8
2588ata_scsi_map_proto(u8 byte1)
2589{
2590 switch((byte1 & 0x1e) >> 1) {
2591 case 3: /* Non-data */
2592 return ATA_PROT_NODATA;
2593
2594 case 6: /* DMA */
2595 return ATA_PROT_DMA;
2596
2597 case 4: /* PIO Data-in */
2598 case 5: /* PIO Data-out */
b095518e
JG		 2599 return ATA_PROT_PIO;
2600
2601 case 10: /* Device Reset */
2602 case 0: /* Hard Reset */
2603 case 1: /* SRST */
2604 case 2: /* Bus Idle */
2605 case 7: /* Packet */
2606 case 8: /* DMA Queued */
2607 case 9: /* Device Diagnostic */
2608 case 11: /* UDMA Data-in */
2609 case 12: /* UDMA Data-Out */
2610 case 13: /* FPDMA */
2611 default: /* Reserved */
2612 break;
2613 }
2614
2615 return ATA_PROT_UNKNOWN;
2616}
2617
2618/**
2619 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2620 * @qc: command structure to be initialized
8e8b77dd 2621 * @scsicmd: SCSI command to convert
b095518e
JG		 2622 *
2623 * Handles either 12 or 16-byte versions of the CDB.
2624 *
2625 * RETURNS:
2626 * Zero on success, non-zero on failure.
2627 */
2628static unsigned int
00ac37f5 2629ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
b095518e
JG		 2630{
2631 struct ata_taskfile *tf = &(qc->tf);
2632 struct scsi_cmnd *cmd = qc->scsicmd;
f79d409f 2633 struct ata_device *dev = qc->dev;
b095518e
JG		 2634
2635 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
9a405257 2636 goto invalid_fld;
8190bdb9 2637
f79d409f
AC		 2638 /* We may not issue DMA commands if no DMA mode is set */
2639 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2640 goto invalid_fld;
b095518e 2641
f59b0cf8
AL		 2642 if (scsicmd[1] & 0xe0)
2643 /* PIO multi not supported yet */
2644 goto invalid_fld;
2645
b095518e
JG		 2646 /*
2647 * 12 and 16 byte CDBs use different offsets to
2648 * provide the various register values.
2649 */
2650 if (scsicmd[0] == ATA_16) {
2651 /*
2652 * 16-byte CDB - may contain extended commands.
2653 *
2654 * If that is the case, copy the upper byte register values.
2655 */
2656 if (scsicmd[1] & 0x01) {
2657 tf->hob_feature = scsicmd[3];
2658 tf->hob_nsect = scsicmd[5];
2659 tf->hob_lbal = scsicmd[7];
2660 tf->hob_lbam = scsicmd[9];
2661 tf->hob_lbah = scsicmd[11];
2662 tf->flags |= ATA_TFLAG_LBA48;
2663 } else
2664 tf->flags &= ~ATA_TFLAG_LBA48;
2665
2666 /*
2667 * Always copy low byte, device and command registers.
2668 */
2669 tf->feature = scsicmd[4];
2670 tf->nsect = scsicmd[6];
2671 tf->lbal = scsicmd[8];
2672 tf->lbam = scsicmd[10];
2673 tf->lbah = scsicmd[12];
2674 tf->device = scsicmd[13];
2675 tf->command = scsicmd[14];
2676 } else {
2677 /*
2678 * 12-byte CDB - incapable of extended commands.
2679 */
2680 tf->flags &= ~ATA_TFLAG_LBA48;
2681
2682 tf->feature = scsicmd[3];
2683 tf->nsect = scsicmd[4];
2684 tf->lbal = scsicmd[5];
2685 tf->lbam = scsicmd[6];
2686 tf->lbah = scsicmd[7];
2687 tf->device = scsicmd[8];
2688 tf->command = scsicmd[9];
2689 }
dcc2d1e7
ML		 2690 /*
2691 * If slave is possible, enforce correct master/slave bit
2692 */
2693 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2694 tf->device = qc->dev->devno ?
2695 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e
JG		 2696
2697 /*
2698 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2699 * SET_FEATURES - XFER MODE must be preceded/succeeded
2700 * by an update to hardware-specific registers for each
2701 * controller (i.e. the reason for ->set_piomode(),
2702 * ->set_dmamode(), and ->post_set_mode() hooks).
2703 */
2704 if ((tf->command == ATA_CMD_SET_FEATURES)
2705 && (tf->feature == SETFEATURES_XFER))
9a405257 2706 goto invalid_fld;
b095518e
JG		 2707
2708 /*
2709 * Set flags so that all registers will be written,
2710 * and pass on write indication (used for PIO/DMA
2711 * setup.)
2712 */
2713 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2714
0274aa25 2715 if (cmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2716 tf->flags |= ATA_TFLAG_WRITE;
2717
2718 /*
2719 * Set transfer length.
2720 *
2721 * TODO: find out if we need to do more here to
2722 * cover scatter/gather case.
2723 */
5d5ff44f 2724 qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
b095518e 2725
e61e0672
TH		 2726 /* request result TF */
2727 qc->flags |= ATA_QCFLAG_RESULT_TF;
2728
b095518e 2729 return 0;
9a405257
TH		 2730
2731 invalid_fld:
2732 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2733 /* "Invalid field in cdb" */
2734 return 1;
b095518e
JG		 2735}
2736
1da177e4
LT		 2737/**
2738 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2739 * @dev: ATA device
2740 * @cmd: SCSI command opcode to consider
2741 *
2742 * Look up the SCSI command given, and determine whether the
2743 * SCSI command is to be translated or simulated.
2744 *
2745 * RETURNS:
2746 * Pointer to translation function if possible, %NULL if not.
2747 */
2748
2749static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2750{
2751 switch (cmd) {
2752 case READ_6:
2753 case READ_10:
2754 case READ_16:
2755
2756 case WRITE_6:
2757 case WRITE_10:
2758 case WRITE_16:
2759 return ata_scsi_rw_xlat;
2760
2761 case SYNCHRONIZE_CACHE:
2762 if (ata_try_flush_cache(dev))
2763 return ata_scsi_flush_xlat;
2764 break;
2765
2766 case VERIFY:
2767 case VERIFY_16:
2768 return ata_scsi_verify_xlat;
b095518e
JG		 2769
2770 case ATA_12:
2771 case ATA_16:
2772 return ata_scsi_pass_thru;
da61396d 2773
972dcafb
DG		 2774 case START_STOP:
2775 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2776 }
2777
2778 return NULL;
2779}
2780
2781/**
2782 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2783 * @ap: ATA port to which the command was being sent
2784 * @cmd: SCSI command to dump
2785 *
2786 * Prints the contents of a SCSI command via printk().
2787 */
2788
2789static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2790 struct scsi_cmnd *cmd)
2791{
2792#ifdef ATA_DEBUG
2793 struct scsi_device *scsidev = cmd->device;
2794 u8 *scsicmd = cmd->cmnd;
2795
2796 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2797 ap->id,
2798 scsidev->channel, scsidev->id, scsidev->lun,
2799 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2800 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2801 scsicmd[8]);
2802#endif
2803}
2804
2115ea94
TH		 2805static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2806 void (*done)(struct scsi_cmnd *),
2807 struct ata_device *dev)
eb3f0f9c 2808{
2115ea94
TH		 2809 int rc = 0;
2810
eb3f0f9c
BK		 2811 if (dev->class == ATA_DEV_ATA) {
2812 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2813 cmd->cmnd[0]);
2814
2815 if (xlat_func)
2115ea94 2816 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
eb3f0f9c 2817 else
3373efd8 2818 ata_scsi_simulate(dev, cmd, done);
eb3f0f9c 2819 } else
2115ea94
TH		 2820 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2821
2822 return rc;
eb3f0f9c
BK		 2823}
2824
1da177e4
LT		 2825/**
2826 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2827 * @cmd: SCSI command to be sent
2828 * @done: Completion function, called when command is complete
2829 *
2830 * In some cases, this function translates SCSI commands into
2831 * ATA taskfiles, and queues the taskfiles to be sent to
2832 * hardware. In other cases, this function simulates a
2833 * SCSI device by evaluating and responding to certain
2834 * SCSI commands. This creates the overall effect of
2835 * ATA and ATAPI devices appearing as SCSI devices.
2836 *
2837 * LOCKING:
cca3974e 2838 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2839 *
2840 * RETURNS:
2115ea94
TH		 2841 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2842 * 0 otherwise.
1da177e4 2843 */
1da177e4
LT		 2844int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2845{
2846 struct ata_port *ap;
2847 struct ata_device *dev;
2848 struct scsi_device *scsidev = cmd->device;
005a5a06 2849 struct Scsi_Host *shost = scsidev->host;
2115ea94 2850 int rc = 0;
1da177e4 2851
35bb94b1 2852 ap = ata_shost_to_port(shost);
005a5a06
JG		 2853
2854 spin_unlock(shost->host_lock);
ba6a1308 2855 spin_lock(ap->lock);
1da177e4
LT		 2856
2857 ata_scsi_dump_cdb(ap, cmd);
2858
2859 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2860 if (likely(dev))
2115ea94 2861 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2862 else {
1da177e4
LT		 2863 cmd->result = (DID_BAD_TARGET << 16);
2864 done(cmd);
1da177e4
LT		 2865 }
2866
ba6a1308 2867 spin_unlock(ap->lock);
005a5a06 2868 spin_lock(shost->host_lock);
2115ea94 2869 return rc;
1da177e4
LT		 2870}
2871
2872/**
2873 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2874 * @dev: the target device
1da177e4
LT		 2875 * @cmd: SCSI command being sent to device.
2876 * @done: SCSI command completion function.
2877 *
2878 * Interprets and directly executes a select list of SCSI commands
2879 * that can be handled internally.
2880 *
2881 * LOCKING:
cca3974e 2882 * spin_lock_irqsave(host lock)
1da177e4
LT		 2883 */
2884
3373efd8 2885void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2886 void (*done)(struct scsi_cmnd *))
2887{
2888 struct ata_scsi_args args;
057ace5e 2889 const u8 *scsicmd = cmd->cmnd;
1da177e4 2890
9a3dccc4
TH		 2891 args.dev = dev;
2892 args.id = dev->id;
1da177e4
LT		 2893 args.cmd = cmd;
2894 args.done = done;
2895
2896 switch(scsicmd[0]) {
2897 /* no-op's, complete with success */
2898 case SYNCHRONIZE_CACHE:
2899 case REZERO_UNIT:
2900 case SEEK_6:
2901 case SEEK_10:
2902 case TEST_UNIT_READY:
2903 case FORMAT_UNIT: /* FIXME: correct? */
2904 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2905 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2906 break;
2907
2908 case INQUIRY:
2909 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2910 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2911 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2912 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2913 else if (scsicmd[2] == 0x00)
2914 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2915 else if (scsicmd[2] == 0x80)
2916 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2917 else if (scsicmd[2] == 0x83)
2918 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2919 else
ae006510 2920 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2921 break;
2922
2923 case MODE_SENSE:
2924 case MODE_SENSE_10:
2925 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2926 break;
2927
2928 case MODE_SELECT: /* unconditionally return */
2929 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2930 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2931 break;
2932
2933 case READ_CAPACITY:
2934 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2935 break;
2936
2937 case SERVICE_ACTION_IN:
2938 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2939 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2940 else
ae006510 2941 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2942 break;
2943
2944 case REPORT_LUNS:
2945 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2946 break;
2947
b095518e 2948 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2949 case REQUEST_SENSE:
2950
2951 /* all other commands */
2952 default:
ae006510
DG		 2953 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2954 /* "Invalid command operation code" */
2955 done(cmd);
1da177e4
LT		 2956 break;
2957 }
2958}
2959
644dd0cc
JG		 2960void ata_scsi_scan_host(struct ata_port *ap)
2961{
2962 unsigned int i;
2963
198e0fed 2964 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2965 return;
2966
3f19ee8c 2967 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3edebac4
TH		 2968 struct ata_device *dev = &ap->device[i];
2969 struct scsi_device *sdev;
2970
2971 if (!ata_dev_enabled(dev) || dev->sdev)
2972 continue;
3f19ee8c 2973
cca3974e 2974 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
3edebac4
TH		 2975 if (!IS_ERR(sdev)) {
2976 dev->sdev = sdev;
2977 scsi_device_put(sdev);
2978 }
3f19ee8c 2979 }
644dd0cc 2980}
0ea035a3
TH		 2981
2982/**
2983 * ata_scsi_offline_dev - offline attached SCSI device
2984 * @dev: ATA device to offline attached SCSI device for
2985 *
2986 * This function is called from ata_eh_hotplug() and responsible
2987 * for taking the SCSI device attached to @dev offline. This
cca3974e 2988 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 2989 * against clearing.
2990 *
2991 * LOCKING:
cca3974e 2992 * spin_lock_irqsave(host lock)
0ea035a3
TH		 2993 *
2994 * RETURNS:
2995 * 1 if attached SCSI device exists, 0 otherwise.
2996 */
2997int ata_scsi_offline_dev(struct ata_device *dev)
2998{
2999 if (dev->sdev) {
3000 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3001 return 1;
3002 }
3003 return 0;
3004}
580b2102
TH		 3005
3006/**
3007 * ata_scsi_remove_dev - remove attached SCSI device
3008 * @dev: ATA device to remove attached SCSI device for
3009 *
3010 * This function is called from ata_eh_scsi_hotplug() and
3011 * responsible for removing the SCSI device attached to @dev.
3012 *
3013 * LOCKING:
3014 * Kernel thread context (may sleep).
3015 */
3016static void ata_scsi_remove_dev(struct ata_device *dev)
3017{
3018 struct ata_port *ap = dev->ap;
3019 struct scsi_device *sdev;
3020 unsigned long flags;
3021
3022 /* Alas, we need to grab scan_mutex to ensure SCSI device
3023 * state doesn't change underneath us and thus
3024 * scsi_device_get() always succeeds. The mutex locking can
3025 * be removed if there is __scsi_device_get() interface which
3026 * increments reference counts regardless of device state.
3027 */
cca3974e 3028 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3029 spin_lock_irqsave(ap->lock, flags);
580b2102 3030
cca3974e 3031 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3032 sdev = dev->sdev;
3033 dev->sdev = NULL;
3034
3035 if (sdev) {
3036 /* If user initiated unplug races with us, sdev can go
cca3974e 3037 * away underneath us after the host lock and
580b2102
TH		 3038 * scan_mutex are released. Hold onto it.
3039 */
3040 if (scsi_device_get(sdev) == 0) {
3041 /* The following ensures the attached sdev is
3042 * offline on return from ata_scsi_offline_dev()
3043 * regardless it wins or loses the race
3044 * against this function.
3045 */
3046 scsi_device_set_state(sdev, SDEV_OFFLINE);
3047 } else {
3048 WARN_ON(1);
3049 sdev = NULL;
3050 }
3051 }
3052
ba6a1308 3053 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3054 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3055
3056 if (sdev) {
3057 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3058 sdev->sdev_gendev.bus_id);
3059
3060 scsi_remove_device(sdev);
3061 scsi_device_put(sdev);
3062 }
3063}
3064
3065/**
3066 * ata_scsi_hotplug - SCSI part of hotplug
3067 * @data: Pointer to ATA port to perform SCSI hotplug on
3068 *
3069 * Perform SCSI part of hotplug. It's executed from a separate
3070 * workqueue after EH completes. This is necessary because SCSI
3071 * hot plugging requires working EH and hot unplugging is
3072 * synchronized with hot plugging with a mutex.
3073 *
3074 * LOCKING:
3075 * Kernel thread context (may sleep).
3076 */
3077void ata_scsi_hotplug(void *data)
3078{
3079 struct ata_port *ap = data;
3080 int i;
3081
b51e9e5d 3082 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3083 DPRINTK("ENTER/EXIT - unloading\n");
3084 return;
3085 }
3086
3087 DPRINTK("ENTER\n");
3088
3089 /* unplug detached devices */
3090 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3091 struct ata_device *dev = &ap->device[i];
3092 unsigned long flags;
3093
3094 if (!(dev->flags & ATA_DFLAG_DETACHED))
3095 continue;
3096
ba6a1308 3097 spin_lock_irqsave(ap->lock, flags);
580b2102 3098 dev->flags &= ~ATA_DFLAG_DETACHED;
ba6a1308 3099 spin_unlock_irqrestore(ap->lock, flags);
580b2102
TH		 3100
3101 ata_scsi_remove_dev(dev);
3102 }
3103
3104 /* scan for new ones */
3105 ata_scsi_scan_host(ap);
3106
3107 /* If we scanned while EH was in progress, scan would have
3108 * failed silently. Requeue if there are enabled but
3109 * unattached devices.
3110 */
3111 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3112 struct ata_device *dev = &ap->device[i];
3113 if (ata_dev_enabled(dev) && !dev->sdev) {
3114 queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
3115 break;
3116 }
3117 }
3118
3119 DPRINTK("EXIT\n");
3120}
83c47bcb
TH		 3121
3122/**
3123 * ata_scsi_user_scan - indication for user-initiated bus scan
3124 * @shost: SCSI host to scan
3125 * @channel: Channel to scan
3126 * @id: ID to scan
3127 * @lun: LUN to scan
3128 *
3129 * This function is called when user explicitly requests bus
3130 * scan. Set probe pending flag and invoke EH.
3131 *
3132 * LOCKING:
3133 * SCSI layer (we don't care)
3134 *
3135 * RETURNS:
3136 * Zero.
3137 */
3138static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3139 unsigned int id, unsigned int lun)
3140{
3141 struct ata_port *ap = ata_shost_to_port(shost);
3142 unsigned long flags;
3143 int rc = 0;
3144
3145 if (!ap->ops->error_handler)
3146 return -EOPNOTSUPP;
3147
3148 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3149 (lun != SCAN_WILD_CARD && lun != 0))
3150 return -EINVAL;
3151
ba6a1308 3152 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 3153
3154 if (id == SCAN_WILD_CARD) {
3155 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3156 ap->eh_info.action |= ATA_EH_SOFTRESET;
3157 } else {
3158 struct ata_device *dev = ata_find_dev(ap, id);
3159
3160 if (dev) {
3161 ap->eh_info.probe_mask |= 1 << dev->devno;
3162 ap->eh_info.action |= ATA_EH_SOFTRESET;
28324304 3163 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3164 } else
3165 rc = -EINVAL;
3166 }
3167
309afcb5 3168 if (rc == 0) {
83c47bcb 3169 ata_port_schedule_eh(ap);
309afcb5
TH		 3170 spin_unlock_irqrestore(ap->lock, flags);
3171 ata_port_wait_eh(ap);
3172 } else
3173 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3174
3175 return rc;
3176}
3057ac3c 3177
3178/**
d0171269
TH		 3179 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3180 * @data: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3181 *
d0171269
TH		 3182 * After ATA pass thru (SAT) commands are executed successfully,
3183 * libata need to propagate the changes to SCSI layer. This
3184 * function must be executed from ata_aux_wq such that sdev
3185 * attach/detach don't race with rescan.
3057ac3c 3186 *
d0171269
TH		 3187 * LOCKING:
3188 * Kernel thread context (may sleep).
3057ac3c 3189 */
3190void ata_scsi_dev_rescan(void *data)
3191{
3192 struct ata_port *ap = data;
3193 struct ata_device *dev;
3194 unsigned int i;
3195
3196 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3197 dev = &ap->device[i];
3198
d0171269 3199 if (ata_dev_enabled(dev) && dev->sdev)
3057ac3c 3200 scsi_rescan_device(&(dev->sdev->sdev_gendev));
3201 }
3202}
80289167
BK		 3203
3204/**
3205 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3206 * @host: ATA host container for all SAS ports
80289167 3207 * @port_info: Information from low-level host driver
cca3974e 3208 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3209 *
3210 * LOCKING:
3211 * PCI/etc. bus probe sem.
3212 *
3213 * RETURNS:
3214 * ata_port pointer on success / NULL on failure.
3215 */
3216
cca3974e 3217struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3218 struct ata_port_info *port_info,
cca3974e 3219 struct Scsi_Host *shost)
80289167
BK		 3220{
3221 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3222 struct ata_probe_ent *ent;
3223
3224 if (!ap)
3225 return NULL;
3226
cca3974e 3227 ent = ata_probe_ent_alloc(host->dev, port_info);
80289167
BK		 3228 if (!ent) {
3229 kfree(ap);
3230 return NULL;
3231 }
3232
cca3974e
JG		 3233 ata_port_init(ap, host, ent, 0);
3234 ap->lock = shost->host_lock;
80289167
BK		 3235 kfree(ent);
3236 return ap;
3237}
3238EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3239
3240/**
3241 * ata_sas_port_start - Set port up for dma.
3242 * @ap: Port to initialize
3243 *
3244 * Called just after data structures for each port are
3245 * initialized. Allocates DMA pad.
3246 *
3247 * May be used as the port_start() entry in ata_port_operations.
3248 *
3249 * LOCKING:
3250 * Inherited from caller.
3251 */
3252int ata_sas_port_start(struct ata_port *ap)
3253{
3254 return ata_pad_alloc(ap, ap->dev);
3255}
3256EXPORT_SYMBOL_GPL(ata_sas_port_start);
3257
3258/**
3259 * ata_port_stop - Undo ata_sas_port_start()
3260 * @ap: Port to shut down
3261 *
3262 * Frees the DMA pad.
3263 *
3264 * May be used as the port_stop() entry in ata_port_operations.
3265 *
3266 * LOCKING:
3267 * Inherited from caller.
3268 */
3269
3270void ata_sas_port_stop(struct ata_port *ap)
3271{
3272 ata_pad_free(ap, ap->dev);
3273}
3274EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3275
3276/**
3277 * ata_sas_port_init - Initialize a SATA device
3278 * @ap: SATA port to initialize
3279 *
3280 * LOCKING:
3281 * PCI/etc. bus probe sem.
3282 *
3283 * RETURNS:
3284 * Zero on success, non-zero on error.
3285 */
3286
3287int ata_sas_port_init(struct ata_port *ap)
3288{
3289 int rc = ap->ops->port_start(ap);
3290
3291 if (!rc)
3292 rc = ata_bus_probe(ap);
3293
3294 return rc;
3295}
3296EXPORT_SYMBOL_GPL(ata_sas_port_init);
3297
3298/**
3299 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3300 * @ap: SATA port to destroy
3301 *
3302 */
3303
3304void ata_sas_port_destroy(struct ata_port *ap)
3305{
3306 ap->ops->port_stop(ap);
3307 kfree(ap);
3308}
3309EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3310
3311/**
3312 * ata_sas_slave_configure - Default slave_config routine for libata devices
3313 * @sdev: SCSI device to configure
3314 * @ap: ATA port to which SCSI device is attached
3315 *
3316 * RETURNS:
3317 * Zero.
3318 */
3319
3320int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3321{
3322 ata_scsi_sdev_config(sdev);
3323 ata_scsi_dev_config(sdev, ap->device);
3324 return 0;
3325}
3326EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3327
3328/**
3329 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3330 * @cmd: SCSI command to be sent
3331 * @done: Completion function, called when command is complete
3332 * @ap: ATA port to which the command is being sent
3333 *
3334 * RETURNS:
08475a19
BK		 3335 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3336 * 0 otherwise.
80289167
BK		 3337 */
3338
3339int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3340 struct ata_port *ap)
3341{
08475a19
BK		 3342 int rc = 0;
3343
80289167
BK		 3344 ata_scsi_dump_cdb(ap, cmd);
3345
3346 if (likely(ata_scsi_dev_enabled(ap->device)))
08475a19 3347 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
80289167
BK		 3348 else {
3349 cmd->result = (DID_BAD_TARGET << 16);
3350 done(cmd);
3351 }
08475a19 3352 return rc;
80289167
BK		 3353}
3354EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
Linux kernel - Deliverables
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