projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] libata: implement ATA_EHI_SETMODE and ATA_EHI_POST_SETMODE
[GitHub/mt8127/android_kernel_alcatel_ttab.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
716 /*
717 * Set length of additional sense data.
718 * Since we only populate descriptor 0, the total
719 * length is the same (fixed) length as descriptor 0.
720 */
721 desc[1] = sb[7] = 14;
722
723 /*
724 * Copy registers into sense buffer.
725 */
726 desc[2] = 0x00;
727 desc[3] = tf->feature; /* == error reg */
728 desc[5] = tf->nsect;
729 desc[7] = tf->lbal;
730 desc[9] = tf->lbam;
731 desc[11] = tf->lbah;
732 desc[12] = tf->device;
733 desc[13] = tf->command; /* == status reg */
734
735 /*
736 * Fill in Extend bit, and the high order bytes
737 * if applicable.
738 */
739 if (tf->flags & ATA_TFLAG_LBA48) {
740 desc[2] |= 0x01;
741 desc[4] = tf->hob_nsect;
742 desc[6] = tf->hob_lbal;
743 desc[8] = tf->hob_lbam;
744 desc[10] = tf->hob_lbah;
1da177e4 745 }
b095518e 746}
1da177e4 747
b095518e
JG		 748/**
749 * ata_gen_fixed_sense - generate a SCSI fixed sense block
750 * @qc: Command that we are erroring out
751 *
752 * Leverage ata_to_sense_error() to give us the codes. Fit our
753 * LBA in here if there's room.
754 *
755 * LOCKING:
756 * inherited from caller
757 */
758void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
759{
760 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 761 struct ata_taskfile *tf = &qc->result_tf;
b095518e 762 unsigned char *sb = cmd->sense_buffer;
246619da 763 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 764
765 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
766
0e5dec47 767 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 768
b095518e
JG		 769 /*
770 * Use ata_to_sense_error() to map status register bits
771 * onto sense key, asc & ascq.
772 */
058e55e1
TH		 773 if (qc->err_mask ||
774 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 775 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 776 &sb[2], &sb[12], &sb[13], verbose);
b095518e 777 sb[2] &= 0x0f;
1da177e4 778 }
1da177e4
LT		 779
780 sb[0] = 0x70;
b095518e 781 sb[7] = 0x0a;
0274aa25 782
a7dac447
JG		 783 if (tf->flags & ATA_TFLAG_LBA48) {
784 /* TODO: find solution for LBA48 descriptors */
785 }
786
787 else if (tf->flags & ATA_TFLAG_LBA) {
b095518e
JG		 788 /* A small (28b) LBA will fit in the 32b info field */
789 sb[0] |= 0x80; /* set valid bit */
790 sb[3] = tf->device & 0x0f;
791 sb[4] = tf->lbah;
792 sb[5] = tf->lbam;
793 sb[6] = tf->lbal;
1da177e4 794 }
a7dac447
JG		 795
796 else {
797 /* TODO: C/H/S */
798 }
1da177e4
LT		 799}
800
a6cce2a7
BK		 801static void ata_scsi_sdev_config(struct scsi_device *sdev)
802{
803 sdev->use_10_for_rw = 1;
804 sdev->use_10_for_ms = 1;
805}
806
807static void ata_scsi_dev_config(struct scsi_device *sdev,
808 struct ata_device *dev)
809{
810 unsigned int max_sectors;
811
812 /* TODO: 2048 is an arbitrary number, not the
813 * hardware maximum. This should be increased to
814 * 65534 when Jens Axboe's patch for dynamically
815 * determining max_sectors is merged.
816 */
817 max_sectors = ATA_MAX_SECTORS;
818 if (dev->flags & ATA_DFLAG_LBA48)
200d5a76 819 max_sectors = ATA_MAX_SECTORS_LBA48;
a6cce2a7
BK		 820 if (dev->max_sectors)
821 max_sectors = dev->max_sectors;
822
823 blk_queue_max_sectors(sdev->request_queue, max_sectors);
824
825 /*
826 * SATA DMA transfers must be multiples of 4 byte, so
827 * we need to pad ATAPI transfers using an extra sg.
828 * Decrement max hw segments accordingly.
829 */
830 if (dev->class == ATA_DEV_ATAPI) {
831 request_queue_t *q = sdev->request_queue;
832 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
833 }
a6e6ce8e
TH		 834
835 if (dev->flags & ATA_DFLAG_NCQ) {
836 int depth;
837
838 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
839 depth = min(ATA_MAX_QUEUE - 1, depth);
840 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
841 }
a6cce2a7
BK		 842}
843
1da177e4
LT		 844/**
845 * ata_scsi_slave_config - Set SCSI device attributes
846 * @sdev: SCSI device to examine
847 *
848 * This is called before we actually start reading
849 * and writing to the device, to configure certain
850 * SCSI mid-layer behaviors.
851 *
852 * LOCKING:
853 * Defined by SCSI layer. We don't really care.
854 */
855
856int ata_scsi_slave_config(struct scsi_device *sdev)
857{
31534363
TH		 858 struct ata_port *ap = ata_shost_to_port(sdev->host);
859 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
860
a6cce2a7 861 ata_scsi_sdev_config(sdev);
1da177e4
LT		 862
863 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
864
31534363 865 if (dev)
a6cce2a7 866 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 867
868 return 0; /* scsi layer doesn't check return value, sigh */
869}
870
83c47bcb
TH		 871/**
872 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
873 * @sdev: SCSI device to be destroyed
874 *
875 * @sdev is about to be destroyed for hot/warm unplugging. If
876 * this unplugging was initiated by libata as indicated by NULL
877 * dev->sdev, this function doesn't have to do anything.
878 * Otherwise, SCSI layer initiated warm-unplug is in progress.
879 * Clear dev->sdev, schedule the device for ATA detach and invoke
880 * EH.
881 *
882 * LOCKING:
883 * Defined by SCSI layer. We don't really care.
884 */
885void ata_scsi_slave_destroy(struct scsi_device *sdev)
886{
887 struct ata_port *ap = ata_shost_to_port(sdev->host);
888 unsigned long flags;
889 struct ata_device *dev;
890
891 if (!ap->ops->error_handler)
892 return;
893
ba6a1308 894 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 895 dev = __ata_scsi_find_dev(ap, sdev);
896 if (dev && dev->sdev) {
897 /* SCSI device already in CANCEL state, no need to offline it */
898 dev->sdev = NULL;
899 dev->flags |= ATA_DFLAG_DETACH;
900 ata_port_schedule_eh(ap);
901 }
ba6a1308 902 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 903}
904
a6e6ce8e
TH		 905/**
906 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
907 * @sdev: SCSI device to configure queue depth for
908 * @queue_depth: new queue depth
909 *
910 * This is libata standard hostt->change_queue_depth callback.
911 * SCSI will call into this callback when user tries to set queue
912 * depth via sysfs.
913 *
914 * LOCKING:
915 * SCSI layer (we don't care)
916 *
917 * RETURNS:
918 * Newly configured queue depth.
919 */
920int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
921{
922 struct ata_port *ap = ata_shost_to_port(sdev->host);
923 struct ata_device *dev;
360f654e 924 unsigned long flags;
a6e6ce8e
TH		 925 int max_depth;
926
927 if (queue_depth < 1)
928 return sdev->queue_depth;
929
930 dev = ata_scsi_find_dev(ap, sdev);
931 if (!dev || !ata_dev_enabled(dev))
932 return sdev->queue_depth;
933
934 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
935 max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
936 if (queue_depth > max_depth)
937 queue_depth = max_depth;
938
939 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
360f654e
TH		 940
941 spin_lock_irqsave(ap->lock, flags);
942 if (queue_depth > 1)
943 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
944 else
945 dev->flags |= ATA_DFLAG_NCQ_OFF;
946 spin_unlock_irqrestore(ap->lock, flags);
947
a6e6ce8e
TH		 948 return queue_depth;
949}
950
972dcafb
DG		 951/**
952 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
953 * @qc: Storage for translated ATA taskfile
954 * @scsicmd: SCSI command to translate
955 *
956 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
957 * (to start). Perhaps these commands should be preceded by
958 * CHECK POWER MODE to see what power mode the device is already in.
959 * [See SAT revision 5 at www.t10.org]
960 *
961 * LOCKING:
cca3974e 962 * spin_lock_irqsave(host lock)
972dcafb
DG		 963 *
964 * RETURNS:
965 * Zero on success, non-zero on error.
966 */
967
968static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
057ace5e 969 const u8 *scsicmd)
972dcafb
DG		 970{
971 struct ata_taskfile *tf = &qc->tf;
972
973 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
974 tf->protocol = ATA_PROT_NODATA;
975 if (scsicmd[1] & 0x1) {
976 ; /* ignore IMMED bit, violates sat-r05 */
977 }
978 if (scsicmd[4] & 0x2)
ae006510 979 goto invalid_fld; /* LOEJ bit set not supported */
972dcafb 980 if (((scsicmd[4] >> 4) & 0xf) != 0)
ae006510 981 goto invalid_fld; /* power conditions not supported */
972dcafb
DG		 982 if (scsicmd[4] & 0x1) {
983 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 984
985 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 986 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 987
988 tf->lbah = 0x0;
989 tf->lbam = 0x0;
990 tf->lbal = 0x0;
991 tf->device |= ATA_LBA;
992 } else {
993 /* CHS */
994 tf->lbal = 0x1; /* sect */
995 tf->lbam = 0x0; /* cyl low */
996 tf->lbah = 0x0; /* cyl high */
997 }
998
972dcafb
DG		 999 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1000 } else {
1001 tf->nsect = 0; /* time period value (0 implies now) */
1002 tf->command = ATA_CMD_STANDBY;
1003 /* Consider: ATA STANDBY IMMEDIATE command */
1004 }
1005 /*
1006 * Standby and Idle condition timers could be implemented but that
1007 * would require libata to implement the Power condition mode page
1008 * and allow the user to change it. Changing mode pages requires
1009 * MODE SELECT to be implemented.
1010 */
1011
1012 return 0;
ae006510
DG		 1013
1014invalid_fld:
1015 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1016 /* "Invalid field in cbd" */
1017 return 1;
972dcafb
DG		 1018}
1019
1020
1da177e4
LT		 1021/**
1022 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1023 * @qc: Storage for translated ATA taskfile
1024 * @scsicmd: SCSI command to translate (ignored)
1025 *
1026 * Sets up an ATA taskfile to issue FLUSH CACHE or
1027 * FLUSH CACHE EXT.
1028 *
1029 * LOCKING:
cca3974e 1030 * spin_lock_irqsave(host lock)
1da177e4
LT		 1031 *
1032 * RETURNS:
1033 * Zero on success, non-zero on error.
1034 */
1035
057ace5e 1036static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1037{
1038 struct ata_taskfile *tf = &qc->tf;
1039
1040 tf->flags |= ATA_TFLAG_DEVICE;
1041 tf->protocol = ATA_PROT_NODATA;
1042
07506697 1043 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
1da177e4
LT		 1044 (ata_id_has_flush_ext(qc->dev->id)))
1045 tf->command = ATA_CMD_FLUSH_EXT;
1046 else
1047 tf->command = ATA_CMD_FLUSH;
1048
1049 return 0;
1050}
1051
3aef5231
AL		 1052/**
1053 * scsi_6_lba_len - Get LBA and transfer length
1054 * @scsicmd: SCSI command to translate
1055 *
1056 * Calculate LBA and transfer length for 6-byte commands.
1057 *
1058 * RETURNS:
1059 * @plba: the LBA
1060 * @plen: the transfer length
1061 */
1062
057ace5e 1063static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1064{
1065 u64 lba = 0;
1066 u32 len = 0;
1067
1068 VPRINTK("six-byte command\n");
1069
1070 lba |= ((u64)scsicmd[2]) << 8;
1071 lba |= ((u64)scsicmd[3]);
1072
1073 len |= ((u32)scsicmd[4]);
1074
1075 *plba = lba;
1076 *plen = len;
1077}
1078
1079/**
1080 * scsi_10_lba_len - Get LBA and transfer length
1081 * @scsicmd: SCSI command to translate
1082 *
1083 * Calculate LBA and transfer length for 10-byte commands.
1084 *
1085 * RETURNS:
1086 * @plba: the LBA
1087 * @plen: the transfer length
1088 */
1089
057ace5e 1090static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1091{
1092 u64 lba = 0;
1093 u32 len = 0;
1094
1095 VPRINTK("ten-byte command\n");
1096
1097 lba |= ((u64)scsicmd[2]) << 24;
1098 lba |= ((u64)scsicmd[3]) << 16;
1099 lba |= ((u64)scsicmd[4]) << 8;
1100 lba |= ((u64)scsicmd[5]);
1101
1102 len |= ((u32)scsicmd[7]) << 8;
1103 len |= ((u32)scsicmd[8]);
1104
1105 *plba = lba;
1106 *plen = len;
1107}
1108
1109/**
1110 * scsi_16_lba_len - Get LBA and transfer length
1111 * @scsicmd: SCSI command to translate
1112 *
1113 * Calculate LBA and transfer length for 16-byte commands.
1114 *
1115 * RETURNS:
1116 * @plba: the LBA
1117 * @plen: the transfer length
1118 */
1119
057ace5e 1120static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 1121{
1122 u64 lba = 0;
1123 u32 len = 0;
1124
1125 VPRINTK("sixteen-byte command\n");
1126
1127 lba |= ((u64)scsicmd[2]) << 56;
1128 lba |= ((u64)scsicmd[3]) << 48;
1129 lba |= ((u64)scsicmd[4]) << 40;
1130 lba |= ((u64)scsicmd[5]) << 32;
1131 lba |= ((u64)scsicmd[6]) << 24;
1132 lba |= ((u64)scsicmd[7]) << 16;
1133 lba |= ((u64)scsicmd[8]) << 8;
1134 lba |= ((u64)scsicmd[9]);
1135
1136 len |= ((u32)scsicmd[10]) << 24;
1137 len |= ((u32)scsicmd[11]) << 16;
1138 len |= ((u32)scsicmd[12]) << 8;
1139 len |= ((u32)scsicmd[13]);
1140
1141 *plba = lba;
1142 *plen = len;
1143}
1144
1da177e4
LT		 1145/**
1146 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1147 * @qc: Storage for translated ATA taskfile
1148 * @scsicmd: SCSI command to translate
1149 *
1150 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1151 *
1152 * LOCKING:
cca3974e 1153 * spin_lock_irqsave(host lock)
1da177e4
LT		 1154 *
1155 * RETURNS:
1156 * Zero on success, non-zero on error.
1157 */
1158
057ace5e 1159static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1160{
1161 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1162 struct ata_device *dev = qc->dev;
1da177e4 1163 u64 dev_sectors = qc->dev->n_sectors;
3aef5231
AL		 1164 u64 block;
1165 u32 n_block;
1da177e4
LT		 1166
1167 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1168 tf->protocol = ATA_PROT_NODATA;
1da177e4 1169
3aef5231
AL		 1170 if (scsicmd[0] == VERIFY)
1171 scsi_10_lba_len(scsicmd, &block, &n_block);
1172 else if (scsicmd[0] == VERIFY_16)
1173 scsi_16_lba_len(scsicmd, &block, &n_block);
1da177e4 1174 else
ae006510 1175 goto invalid_fld;
1da177e4 1176
8bf62ece 1177 if (!n_block)
ae006510 1178 goto nothing_to_do;
8bf62ece 1179 if (block >= dev_sectors)
ae006510 1180 goto out_of_range;
8bf62ece 1181 if ((block + n_block) > dev_sectors)
ae006510 1182 goto out_of_range;
1da177e4 1183
07506697
AL		 1184 if (dev->flags & ATA_DFLAG_LBA) {
1185 tf->flags |= ATA_TFLAG_LBA;
1186
c6a33e24
AL		 1187 if (lba_28_ok(block, n_block)) {
1188 /* use LBA28 */
1189 tf->command = ATA_CMD_VERIFY;
1190 tf->device |= (block >> 24) & 0xf;
1191 } else if (lba_48_ok(block, n_block)) {
1192 if (!(dev->flags & ATA_DFLAG_LBA48))
1193 goto out_of_range;
07506697
AL		 1194
1195 /* use LBA48 */
1196 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1197 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1198
8bf62ece 1199 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1200
8bf62ece
AL		 1201 tf->hob_lbah = (block >> 40) & 0xff;
1202 tf->hob_lbam = (block >> 32) & 0xff;
1203 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1204 } else
1205 /* request too large even for LBA48 */
1206 goto out_of_range;
8bf62ece
AL		 1207
1208 tf->nsect = n_block & 0xff;
1da177e4 1209
8bf62ece
AL		 1210 tf->lbah = (block >> 16) & 0xff;
1211 tf->lbam = (block >> 8) & 0xff;
1212 tf->lbal = block & 0xff;
1da177e4 1213
8bf62ece
AL		 1214 tf->device |= ATA_LBA;
1215 } else {
1216 /* CHS */
1217 u32 sect, head, cyl, track;
1218
c6a33e24
AL		 1219 if (!lba_28_ok(block, n_block))
1220 goto out_of_range;
07506697 1221
8bf62ece
AL		 1222 /* Convert LBA to CHS */
1223 track = (u32)block / dev->sectors;
1224 cyl = track / dev->heads;
1225 head = track % dev->heads;
1226 sect = (u32)block % dev->sectors + 1;
1227
c187c4b5
AL		 1228 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1229 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1230
1231 /* Check whether the converted CHS can fit.
1232 Cylinder: 0-65535
8bf62ece
AL		 1233 Head: 0-15
1234 Sector: 1-255*/
2e9edbf8 1235 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1236 goto out_of_range;
2e9edbf8 1237
8bf62ece
AL		 1238 tf->command = ATA_CMD_VERIFY;
1239 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1240 tf->lbal = sect;
1241 tf->lbam = cyl;
1242 tf->lbah = cyl >> 8;
1243 tf->device |= head;
1244 }
1da177e4
LT		 1245
1246 return 0;
ae006510
DG		 1247
1248invalid_fld:
1249 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1250 /* "Invalid field in cbd" */
1251 return 1;
1252
1253out_of_range:
1254 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1255 /* "Logical Block Address out of range" */
1256 return 1;
1257
1258nothing_to_do:
1259 qc->scsicmd->result = SAM_STAT_GOOD;
1260 return 1;
1da177e4
LT		 1261}
1262
1263/**
1264 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1265 * @qc: Storage for translated ATA taskfile
1266 * @scsicmd: SCSI command to translate
1267 *
1268 * Converts any of six SCSI read/write commands into the
1269 * ATA counterpart, including starting sector (LBA),
1270 * sector count, and taking into account the device's LBA48
1271 * support.
1272 *
1273 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1274 * %WRITE_16 are currently supported.
1275 *
1276 * LOCKING:
cca3974e 1277 * spin_lock_irqsave(host lock)
1da177e4
LT		 1278 *
1279 * RETURNS:
1280 * Zero on success, non-zero on error.
1281 */
1282
057ace5e 1283static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1284{
1285 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1286 struct ata_device *dev = qc->dev;
3aef5231
AL		 1287 u64 block;
1288 u32 n_block;
1da177e4 1289
27197367 1290 qc->flags |= ATA_QCFLAG_IO;
1da177e4 1291 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1da177e4 1292
8cbd6df1
AL		 1293 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1294 scsicmd[0] == WRITE_16)
1da177e4 1295 tf->flags |= ATA_TFLAG_WRITE;
1da177e4 1296
9a3dccc4 1297 /* Calculate the SCSI LBA, transfer length and FUA. */
3aef5231
AL		 1298 switch (scsicmd[0]) {
1299 case READ_10:
1300 case WRITE_10:
1301 scsi_10_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1302 if (unlikely(scsicmd[1] & (1 << 3)))
1303 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1304 break;
1305 case READ_6:
1306 case WRITE_6:
1307 scsi_6_lba_len(scsicmd, &block, &n_block);
c187c4b5
AL		 1308
1309 /* for 6-byte r/w commands, transfer length 0
1310 * means 256 blocks of data, not 0 block.
1311 */
76b2bf9b
JG		 1312 if (!n_block)
1313 n_block = 256;
3aef5231
AL		 1314 break;
1315 case READ_16:
1316 case WRITE_16:
1317 scsi_16_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1318 if (unlikely(scsicmd[1] & (1 << 3)))
1319 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1320 break;
1321 default:
8bf62ece 1322 DPRINTK("no-byte command\n");
ae006510 1323 goto invalid_fld;
1da177e4
LT		 1324 }
1325
8bf62ece
AL		 1326 /* Check and compose ATA command */
1327 if (!n_block)
c187c4b5
AL		 1328 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1329 * length 0 means transfer 0 block of data.
1330 * However, for ATA R/W commands, sector count 0 means
1331 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1332 *
1333 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1334 */
ae006510 1335 goto nothing_to_do;
1da177e4 1336
360f654e
TH		 1337 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1338 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
3dc1d881
TH		 1339 /* yay, NCQ */
1340 if (!lba_48_ok(block, n_block))
1341 goto out_of_range;
1342
1343 tf->protocol = ATA_PROT_NCQ;
1344 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1345
1346 if (tf->flags & ATA_TFLAG_WRITE)
1347 tf->command = ATA_CMD_FPDMA_WRITE;
1348 else
1349 tf->command = ATA_CMD_FPDMA_READ;
1350
1351 qc->nsect = n_block;
1352
1353 tf->nsect = qc->tag << 3;
1354 tf->hob_feature = (n_block >> 8) & 0xff;
1355 tf->feature = n_block & 0xff;
1356
1357 tf->hob_lbah = (block >> 40) & 0xff;
1358 tf->hob_lbam = (block >> 32) & 0xff;
1359 tf->hob_lbal = (block >> 24) & 0xff;
1360 tf->lbah = (block >> 16) & 0xff;
1361 tf->lbam = (block >> 8) & 0xff;
1362 tf->lbal = block & 0xff;
1363
1364 tf->device = 1 << 6;
1365 if (tf->flags & ATA_TFLAG_FUA)
1366 tf->device |= 1 << 7;
1367 } else if (dev->flags & ATA_DFLAG_LBA) {
07506697
AL		 1368 tf->flags |= ATA_TFLAG_LBA;
1369
c6a33e24
AL		 1370 if (lba_28_ok(block, n_block)) {
1371 /* use LBA28 */
1372 tf->device |= (block >> 24) & 0xf;
1373 } else if (lba_48_ok(block, n_block)) {
1374 if (!(dev->flags & ATA_DFLAG_LBA48))
ae006510 1375 goto out_of_range;
1da177e4 1376
07506697
AL		 1377 /* use LBA48 */
1378 tf->flags |= ATA_TFLAG_LBA48;
1379
8bf62ece
AL		 1380 tf->hob_nsect = (n_block >> 8) & 0xff;
1381
1382 tf->hob_lbah = (block >> 40) & 0xff;
1383 tf->hob_lbam = (block >> 32) & 0xff;
1384 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1385 } else
1386 /* request too large even for LBA48 */
1387 goto out_of_range;
c187c4b5 1388
9a3dccc4
TH		 1389 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1390 goto invalid_fld;
8cbd6df1 1391
8bf62ece
AL		 1392 qc->nsect = n_block;
1393 tf->nsect = n_block & 0xff;
1da177e4 1394
8bf62ece
AL		 1395 tf->lbah = (block >> 16) & 0xff;
1396 tf->lbam = (block >> 8) & 0xff;
1397 tf->lbal = block & 0xff;
1da177e4 1398
8bf62ece 1399 tf->device |= ATA_LBA;
2e9edbf8 1400 } else {
8bf62ece
AL		 1401 /* CHS */
1402 u32 sect, head, cyl, track;
1403
1404 /* The request -may- be too large for CHS addressing. */
c6a33e24 1405 if (!lba_28_ok(block, n_block))
ae006510 1406 goto out_of_range;
c187c4b5 1407
9a3dccc4
TH		 1408 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1409 goto invalid_fld;
8cbd6df1 1410
8bf62ece
AL		 1411 /* Convert LBA to CHS */
1412 track = (u32)block / dev->sectors;
1413 cyl = track / dev->heads;
1414 head = track % dev->heads;
1415 sect = (u32)block % dev->sectors + 1;
1416
c187c4b5 1417 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
8bf62ece 1418 (u32)block, track, cyl, head, sect);
c187c4b5 1419
2e9edbf8
JG		 1420 /* Check whether the converted CHS can fit.
1421 Cylinder: 0-65535
8bf62ece
AL		 1422 Head: 0-15
1423 Sector: 1-255*/
c187c4b5 1424 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1425 goto out_of_range;
c187c4b5 1426
8bf62ece
AL		 1427 qc->nsect = n_block;
1428 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1429 tf->lbal = sect;
1430 tf->lbam = cyl;
1431 tf->lbah = cyl >> 8;
1432 tf->device |= head;
1da177e4
LT		 1433 }
1434
8bf62ece 1435 return 0;
ae006510
DG		 1436
1437invalid_fld:
1438 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1439 /* "Invalid field in cbd" */
1440 return 1;
1441
1442out_of_range:
1443 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1444 /* "Logical Block Address out of range" */
1445 return 1;
1446
1447nothing_to_do:
1448 qc->scsicmd->result = SAM_STAT_GOOD;
1449 return 1;
1da177e4
LT		 1450}
1451
77853bf2 1452static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4 1453{
c31f571d 1454 struct ata_port *ap = qc->ap;
1da177e4 1455 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1456 u8 *cdb = cmd->cmnd;
a22e2eb0 1457 int need_sense = (qc->err_mask != 0);
b095518e 1458
3057ac3c 1459 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1460 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1461 * cache
1462 */
c31f571d
TH		 1463 if (ap->ops->error_handler &&
1464 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
3057ac3c 1465 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1466 (qc->tf.feature == SETFEATURES_WC_OFF))) {
c31f571d
TH		 1467 ap->eh_info.action |= ATA_EH_REVALIDATE;
1468 ata_port_schedule_eh(ap);
3057ac3c 1469 }
1470
b095518e
JG		 1471 /* For ATA pass thru (SAT) commands, generate a sense block if
1472 * user mandated it or if there's an error. Note that if we
1473 * generate because the user forced us to, a check condition
1474 * is generated and the ATA register values are returned
1475 * whether the command completed successfully or not. If there
1476 * was no error, SK, ASC and ASCQ will all be zero.
1477 */
a7dac447
JG		 1478 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1479 ((cdb[2] & 0x20) || need_sense)) {
b095518e
JG		 1480 ata_gen_ata_desc_sense(qc);
1481 } else {
1482 if (!need_sense) {
1483 cmd->result = SAM_STAT_GOOD;
1484 } else {
1485 /* TODO: decide which descriptor format to use
1486 * for 48b LBA devices and call that here
1487 * instead of the fixed desc, which is only
1488 * good for smaller LBA (and maybe CHS?)
1489 * devices.
1490 */
1491 ata_gen_fixed_sense(qc);
1492 }
1493 }
1da177e4 1494
c31f571d
TH		 1495 if (need_sense && !ap->ops->error_handler)
1496 ata_dump_status(ap->id, &qc->result_tf);
1da177e4
LT		 1497
1498 qc->scsidone(cmd);
1499
77853bf2 1500 ata_qc_free(qc);
1da177e4
LT		 1501}
1502
3dc1d881
TH		 1503/**
1504 * ata_scmd_need_defer - Check whether we need to defer scmd
1505 * @dev: ATA device to which the command is addressed
1506 * @is_io: Is the command IO (and thus possibly NCQ)?
1507 *
1508 * NCQ and non-NCQ commands cannot run together. As upper layer
1509 * only knows the queue depth, we are responsible for maintaining
1510 * exclusion. This function checks whether a new command can be
1511 * issued to @dev.
1512 *
1513 * LOCKING:
cca3974e 1514 * spin_lock_irqsave(host lock)
3dc1d881
TH		 1515 *
1516 * RETURNS:
1517 * 1 if deferring is needed, 0 otherwise.
1518 */
1519static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1520{
1521 struct ata_port *ap = dev->ap;
1522
1523 if (!(dev->flags & ATA_DFLAG_NCQ))
1524 return 0;
1525
1526 if (is_io) {
1527 if (!ata_tag_valid(ap->active_tag))
1528 return 0;
1529 } else {
1530 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1531 return 0;
1532 }
1533 return 1;
1534}
1535
1da177e4
LT		 1536/**
1537 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1538 * @dev: ATA device to which the command is addressed
1539 * @cmd: SCSI command to execute
1540 * @done: SCSI command completion function
1541 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1542 *
1543 * Our ->queuecommand() function has decided that the SCSI
1544 * command issued can be directly translated into an ATA
1545 * command, rather than handled internally.
1546 *
1547 * This function sets up an ata_queued_cmd structure for the
1548 * SCSI command, and sends that ata_queued_cmd to the hardware.
1549 *
ae006510
DG		 1550 * The xlat_func argument (actor) returns 0 if ready to execute
1551 * ATA command, else 1 to finish translation. If 1 is returned
1552 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1553 * to be set reflecting an error condition or clean (early)
1554 * termination.
1555 *
1da177e4 1556 * LOCKING:
cca3974e 1557 * spin_lock_irqsave(host lock)
2115ea94
TH		 1558 *
1559 * RETURNS:
1560 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1561 * needs to be deferred.
1da177e4 1562 */
2115ea94
TH		 1563static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1564 void (*done)(struct scsi_cmnd *),
1565 ata_xlat_func_t xlat_func)
1da177e4
LT		 1566{
1567 struct ata_queued_cmd *qc;
1568 u8 *scsicmd = cmd->cmnd;
3dc1d881 1569 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1570
1571 VPRINTK("ENTER\n");
1572
3dc1d881
TH		 1573 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1574 goto defer;
1575
3373efd8 1576 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1577 if (!qc)
ae006510 1578 goto err_mem;
1da177e4
LT		 1579
1580 /* data is present; dma-map it */
be7db055
CH		 1581 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1582 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1583 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1584 ata_dev_printk(dev, KERN_WARNING,
1585 "WARNING: zero len r/w req\n");
ae006510 1586 goto err_did;
1da177e4
LT		 1587 }
1588
1589 if (cmd->use_sg)
1590 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1591 else
1592 ata_sg_init_one(qc, cmd->request_buffer,
1593 cmd->request_bufflen);
1594
1595 qc->dma_dir = cmd->sc_data_direction;
1596 }
1597
1598 qc->complete_fn = ata_scsi_qc_complete;
1599
1600 if (xlat_func(qc, scsicmd))
ae006510 1601 goto early_finish;
1da177e4
LT		 1602
1603 /* select device, send command to hardware */
8e0e694a 1604 ata_qc_issue(qc);
1da177e4
LT		 1605
1606 VPRINTK("EXIT\n");
2115ea94 1607 return 0;
1da177e4 1608
ae006510
DG		 1609early_finish:
1610 ata_qc_free(qc);
1611 done(cmd);
1612 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1613 return 0;
ae006510
DG		 1614
1615err_did:
1da177e4 1616 ata_qc_free(qc);
ae006510
DG		 1617 cmd->result = (DID_ERROR << 16);
1618 done(cmd);
253b92ec 1619err_mem:
ae006510 1620 DPRINTK("EXIT - internal\n");
2115ea94 1621 return 0;
3dc1d881
TH		 1622
1623defer:
1624 DPRINTK("EXIT - defer\n");
1625 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1626}
1627
1628/**
1629 * ata_scsi_rbuf_get - Map response buffer.
1630 * @cmd: SCSI command containing buffer to be mapped.
1631 * @buf_out: Pointer to mapped area.
1632 *
1633 * Maps buffer contained within SCSI command @cmd.
1634 *
1635 * LOCKING:
cca3974e 1636 * spin_lock_irqsave(host lock)
1da177e4
LT		 1637 *
1638 * RETURNS:
1639 * Length of response buffer.
1640 */
1641
1642static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1643{
1644 u8 *buf;
1645 unsigned int buflen;
1646
1647 if (cmd->use_sg) {
1648 struct scatterlist *sg;
1649
1650 sg = (struct scatterlist *) cmd->request_buffer;
1651 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1652 buflen = sg->length;
1653 } else {
1654 buf = cmd->request_buffer;
1655 buflen = cmd->request_bufflen;
1656 }
1657
1658 *buf_out = buf;
1659 return buflen;
1660}
1661
1662/**
1663 * ata_scsi_rbuf_put - Unmap response buffer.
1664 * @cmd: SCSI command containing buffer to be unmapped.
1665 * @buf: buffer to unmap
1666 *
1667 * Unmaps response buffer contained within @cmd.
1668 *
1669 * LOCKING:
cca3974e 1670 * spin_lock_irqsave(host lock)
1da177e4
LT		 1671 */
1672
1673static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1674{
1675 if (cmd->use_sg) {
1676 struct scatterlist *sg;
1677
1678 sg = (struct scatterlist *) cmd->request_buffer;
1679 kunmap_atomic(buf - sg->offset, KM_USER0);
1680 }
1681}
1682
1683/**
1684 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1685 * @args: device IDENTIFY data / SCSI command of interest.
1686 * @actor: Callback hook for desired SCSI command simulator
1687 *
1688 * Takes care of the hard work of simulating a SCSI command...
1689 * Mapping the response buffer, calling the command's handler,
1690 * and handling the handler's return value. This return value
1691 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1692 * completed successfully (0), or not (in which case cmd->result
1693 * and sense buffer are assumed to be set).
1da177e4
LT		 1694 *
1695 * LOCKING:
cca3974e 1696 * spin_lock_irqsave(host lock)
1da177e4
LT		 1697 */
1698
1699void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1700 unsigned int (*actor) (struct ata_scsi_args *args,
1701 u8 *rbuf, unsigned int buflen))
1702{
1703 u8 *rbuf;
1704 unsigned int buflen, rc;
1705 struct scsi_cmnd *cmd = args->cmd;
1706
1707 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1708 memset(rbuf, 0, buflen);
1709 rc = actor(args, rbuf, buflen);
1710 ata_scsi_rbuf_put(cmd, rbuf);
1711
ae006510 1712 if (rc == 0)
1da177e4 1713 cmd->result = SAM_STAT_GOOD;
ae006510 1714 args->done(cmd);
1da177e4
LT		 1715}
1716
1717/**
1718 * ata_scsiop_inq_std - Simulate INQUIRY command
1719 * @args: device IDENTIFY data / SCSI command of interest.
1720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1721 * @buflen: Response buffer length.
1722 *
1723 * Returns standard device identification data associated
b142eb65 1724 * with non-VPD INQUIRY command output.
1da177e4
LT		 1725 *
1726 * LOCKING:
cca3974e 1727 * spin_lock_irqsave(host lock)
1da177e4
LT		 1728 */
1729
1730unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1731 unsigned int buflen)
1732{
1733 u8 hdr[] = {
1734 TYPE_DISK,
1735 0,
1736 0x5, /* claim SPC-3 version compatibility */
1737 2,
1738 95 - 4
1739 };
1740
1741 /* set scsi removeable (RMB) bit per ata bit */
1742 if (ata_id_removeable(args->id))
1743 hdr[1] |= (1 << 7);
1744
1745 VPRINTK("ENTER\n");
1746
1747 memcpy(rbuf, hdr, sizeof(hdr));
1748
1749 if (buflen > 35) {
1750 memcpy(&rbuf[8], "ATA ", 8);
6a62a04d
TH		 1751 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1752 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1da177e4
LT		 1753 if (rbuf[32] == 0 || rbuf[32] == ' ')
1754 memcpy(&rbuf[32], "n/a ", 4);
1755 }
1756
1757 if (buflen > 63) {
1758 const u8 versions[] = {
1759 0x60, /* SAM-3 (no version claimed) */
1760
1761 0x03,
1762 0x20, /* SBC-2 (no version claimed) */
1763
1764 0x02,
1765 0x60 /* SPC-3 (no version claimed) */
1766 };
1767
1768 memcpy(rbuf + 59, versions, sizeof(versions));
1769 }
1770
1771 return 0;
1772}
1773
1774/**
b142eb65 1775 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1776 * @args: device IDENTIFY data / SCSI command of interest.
1777 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1778 * @buflen: Response buffer length.
1779 *
b142eb65 1780 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1781 *
1782 * LOCKING:
cca3974e 1783 * spin_lock_irqsave(host lock)
1da177e4
LT		 1784 */
1785
1786unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1787 unsigned int buflen)
1788{
1789 const u8 pages[] = {
1790 0x00, /* page 0x00, this page */
1791 0x80, /* page 0x80, unit serial no page */
1792 0x83 /* page 0x83, device ident page */
1793 };
b142eb65 1794 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1795
1796 if (buflen > 6)
1797 memcpy(rbuf + 4, pages, sizeof(pages));
1798
1799 return 0;
1800}
1801
1802/**
b142eb65 1803 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1804 * @args: device IDENTIFY data / SCSI command of interest.
1805 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1806 * @buflen: Response buffer length.
1807 *
1808 * Returns ATA device serial number.
1809 *
1810 * LOCKING:
cca3974e 1811 * spin_lock_irqsave(host lock)
1da177e4
LT		 1812 */
1813
1814unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1815 unsigned int buflen)
1816{
1817 const u8 hdr[] = {
1818 0,
1819 0x80, /* this page code */
1820 0,
1821 ATA_SERNO_LEN, /* page len */
1822 };
1823 memcpy(rbuf, hdr, sizeof(hdr));
1824
1825 if (buflen > (ATA_SERNO_LEN + 4 - 1))
6a62a04d
TH		 1826 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1827 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1da177e4
LT		 1828
1829 return 0;
1830}
1831
1da177e4 1832/**
b142eb65 1833 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1834 * @args: device IDENTIFY data / SCSI command of interest.
1835 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1836 * @buflen: Response buffer length.
1837 *
b142eb65
JG		 1838 * Yields two logical unit device identification designators:
1839 * - vendor specific ASCII containing the ATA serial number
1840 * - SAT defined "t10 vendor id based" containing ASCII vendor
1841 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1842 *
1843 * LOCKING:
cca3974e 1844 * spin_lock_irqsave(host lock)
1da177e4
LT		 1845 */
1846
1847unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1848 unsigned int buflen)
1849{
b142eb65
JG		 1850 int num;
1851 const int sat_model_serial_desc_len = 68;
1852 const int ata_model_byte_len = 40;
1da177e4 1853
b142eb65
JG		 1854 rbuf[1] = 0x83; /* this page code */
1855 num = 4;
1856
1857 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1858 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1859 rbuf[num + 0] = 2;
b142eb65
JG		 1860 rbuf[num + 3] = ATA_SERNO_LEN;
1861 num += 4;
1862 ata_id_string(args->id, (unsigned char *) rbuf + num,
1863 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1864 num += ATA_SERNO_LEN;
1da177e4 1865 }
b142eb65
JG		 1866 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1867 /* SAT defined lu model and serial numbers descriptor */
1868 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1869 rbuf[num + 0] = 2;
1870 rbuf[num + 1] = 1;
b142eb65
JG		 1871 rbuf[num + 3] = sat_model_serial_desc_len;
1872 num += 4;
1873 memcpy(rbuf + num, "ATA ", 8);
1874 num += 8;
1875 ata_id_string(args->id, (unsigned char *) rbuf + num,
1876 ATA_ID_PROD_OFS, ata_model_byte_len);
1877 num += ata_model_byte_len;
1878 ata_id_string(args->id, (unsigned char *) rbuf + num,
1879 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1880 num += ATA_SERNO_LEN;
1881 }
1882 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1883 return 0;
1884}
1885
1886/**
0cba632b 1887 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1888 * @args: device IDENTIFY data / SCSI command of interest.
1889 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1890 * @buflen: Response buffer length.
1891 *
1892 * No operation. Simply returns success to caller, to indicate
1893 * that the caller should successfully complete this SCSI command.
1894 *
1895 * LOCKING:
cca3974e 1896 * spin_lock_irqsave(host lock)
1da177e4
LT		 1897 */
1898
1899unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1900 unsigned int buflen)
1901{
1902 VPRINTK("ENTER\n");
1903 return 0;
1904}
1905
1906/**
1907 * ata_msense_push - Push data onto MODE SENSE data output buffer
1908 * @ptr_io: (input/output) Location to store more output data
1909 * @last: End of output data buffer
1910 * @buf: Pointer to BLOB being added to output buffer
1911 * @buflen: Length of BLOB
1912 *
1913 * Store MODE SENSE data on an output buffer.
1914 *
1915 * LOCKING:
1916 * None.
1917 */
1918
1919static void ata_msense_push(u8 **ptr_io, const u8 *last,
1920 const u8 *buf, unsigned int buflen)
1921{
1922 u8 *ptr = *ptr_io;
1923
1924 if ((ptr + buflen - 1) > last)
1925 return;
1926
1927 memcpy(ptr, buf, buflen);
1928
1929 ptr += buflen;
1930
1931 *ptr_io = ptr;
1932}
1933
1934/**
1935 * ata_msense_caching - Simulate MODE SENSE caching info page
1936 * @id: device IDENTIFY data
1937 * @ptr_io: (input/output) Location to store more output data
1938 * @last: End of output data buffer
1939 *
1940 * Generate a caching info page, which conditionally indicates
1941 * write caching to the SCSI layer, depending on device
1942 * capabilities.
1943 *
1944 * LOCKING:
1945 * None.
1946 */
1947
1948static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1949 const u8 *last)
1950{
00ac37f5 1951 u8 page[CACHE_MPAGE_LEN];
1da177e4 1952
00ac37f5 1953 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1954 if (ata_id_wcache_enabled(id))
1955 page[2] |= (1 << 2); /* write cache enable */
1956 if (!ata_id_rahead_enabled(id))
1957 page[12] |= (1 << 5); /* disable read ahead */
1958
1959 ata_msense_push(ptr_io, last, page, sizeof(page));
1960 return sizeof(page);
1961}
1962
1963/**
1964 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1965 * @dev: Device associated with this MODE SENSE command
1966 * @ptr_io: (input/output) Location to store more output data
1967 * @last: End of output data buffer
1968 *
1969 * Generate a generic MODE SENSE control mode page.
1970 *
1971 * LOCKING:
1972 * None.
1973 */
1974
1975static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1976{
00ac37f5
DG		 1977 ata_msense_push(ptr_io, last, def_control_mpage,
1978 sizeof(def_control_mpage));
1979 return sizeof(def_control_mpage);
1da177e4
LT		 1980}
1981
1982/**
1983 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1984 * @dev: Device associated with this MODE SENSE command
1985 * @ptr_io: (input/output) Location to store more output data
1986 * @last: End of output data buffer
1987 *
1988 * Generate a generic MODE SENSE r/w error recovery page.
1989 *
1990 * LOCKING:
1991 * None.
1992 */
1993
1994static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1995{
1da177e4 1996
00ac37f5
DG		 1997 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1998 sizeof(def_rw_recovery_mpage));
1999 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 2000}
2001
48bdc8ec
JA		 2002/*
2003 * We can turn this into a real blacklist if it's needed, for now just
2004 * blacklist any Maxtor BANC1G10 revision firmware
2005 */
2006static int ata_dev_supports_fua(u16 *id)
2007{
2008 unsigned char model[41], fw[9];
2009
c3c013a2
JG		 2010 if (!libata_fua)
2011 return 0;
48bdc8ec
JA		 2012 if (!ata_id_has_fua(id))
2013 return 0;
2014
6a62a04d
TH		 2015 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
2016 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
48bdc8ec 2017
2e02671d 2018 if (strcmp(model, "Maxtor"))
48bdc8ec 2019 return 1;
2e02671d 2020 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2021 return 1;
2022
2023 return 0; /* blacklisted */
2024}
2025
1da177e4
LT		 2026/**
2027 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2028 * @args: device IDENTIFY data / SCSI command of interest.
2029 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2030 * @buflen: Response buffer length.
2031 *
00ac37f5
DG		 2032 * Simulate MODE SENSE commands. Assume this is invoked for direct
2033 * access devices (e.g. disks) only. There should be no block
2034 * descriptor for other device types.
1da177e4
LT		 2035 *
2036 * LOCKING:
cca3974e 2037 * spin_lock_irqsave(host lock)
1da177e4
LT		 2038 */
2039
2040unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2041 unsigned int buflen)
2042{
9a3dccc4 2043 struct ata_device *dev = args->dev;
1da177e4 2044 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2045 const u8 sat_blk_desc[] = {
2046 0, 0, 0, 0, /* number of blocks: sat unspecified */
2047 0,
2048 0, 0x2, 0x0 /* block length: 512 bytes */
2049 };
2050 u8 pg, spg;
2051 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2052 u8 dpofua;
1da177e4
LT		 2053
2054 VPRINTK("ENTER\n");
2055
2056 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2057 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2058 /*
2059 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2060 */
00ac37f5 2061
1da177e4 2062 page_control = scsicmd[2] >> 6;
ae006510
DG		 2063 switch (page_control) {
2064 case 0: /* current */
2065 break; /* supported */
2066 case 3: /* saved */
2067 goto saving_not_supp;
2068 case 1: /* changeable */
2069 case 2: /* defaults */
2070 default:
2071 goto invalid_fld;
2072 }
1da177e4 2073
00ac37f5
DG		 2074 if (six_byte) {
2075 output_len = 4 + (ebd ? 8 : 0);
2076 alloc_len = scsicmd[4];
2077 } else {
2078 output_len = 8 + (ebd ? 8 : 0);
2079 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2080 }
2081 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2082
2083 p = rbuf + output_len;
00ac37f5 2084 last = rbuf + minlen - 1;
1da177e4 2085
00ac37f5
DG		 2086 pg = scsicmd[2] & 0x3f;
2087 spg = scsicmd[3];
2088 /*
2089 * No mode subpages supported (yet) but asking for _all_
2090 * subpages may be valid
2091 */
2092 if (spg && (spg != ALL_SUB_MPAGES))
2093 goto invalid_fld;
2094
2095 switch(pg) {
2096 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2097 output_len += ata_msense_rw_recovery(&p, last);
2098 break;
2099
00ac37f5 2100 case CACHE_MPAGE:
1da177e4
LT		 2101 output_len += ata_msense_caching(args->id, &p, last);
2102 break;
2103
00ac37f5 2104 case CONTROL_MPAGE: {
1da177e4
LT		 2105 output_len += ata_msense_ctl_mode(&p, last);
2106 break;
2107 }
2108
00ac37f5 2109 case ALL_MPAGES:
1da177e4
LT		 2110 output_len += ata_msense_rw_recovery(&p, last);
2111 output_len += ata_msense_caching(args->id, &p, last);
2112 output_len += ata_msense_ctl_mode(&p, last);
2113 break;
2114
2115 default: /* invalid page code */
ae006510 2116 goto invalid_fld;
1da177e4
LT		 2117 }
2118
00ac37f5
DG		 2119 if (minlen < 1)
2120 return 0;
9a3dccc4
TH		 2121
2122 dpofua = 0;
f79d409f 2123 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2124 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2125 dpofua = 1 << 4;
2126
1da177e4
LT		 2127 if (six_byte) {
2128 output_len--;
2129 rbuf[0] = output_len;
9a3dccc4
TH		 2130 if (minlen > 2)
2131 rbuf[2] |= dpofua;
00ac37f5
DG		 2132 if (ebd) {
2133 if (minlen > 3)
2134 rbuf[3] = sizeof(sat_blk_desc);
2135 if (minlen > 11)
2136 memcpy(rbuf + 4, sat_blk_desc,
2137 sizeof(sat_blk_desc));
2138 }
1da177e4
LT		 2139 } else {
2140 output_len -= 2;
2141 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2142 if (minlen > 1)
2143 rbuf[1] = output_len;
9a3dccc4
TH		 2144 if (minlen > 3)
2145 rbuf[3] |= dpofua;
00ac37f5
DG		 2146 if (ebd) {
2147 if (minlen > 7)
2148 rbuf[7] = sizeof(sat_blk_desc);
2149 if (minlen > 15)
2150 memcpy(rbuf + 8, sat_blk_desc,
2151 sizeof(sat_blk_desc));
2152 }
1da177e4 2153 }
1da177e4 2154 return 0;
ae006510
DG		 2155
2156invalid_fld:
2157 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2158 /* "Invalid field in cbd" */
2159 return 1;
2160
2161saving_not_supp:
2162 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2163 /* "Saving parameters not supported" */
2164 return 1;
1da177e4
LT		 2165}
2166
2167/**
2168 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2169 * @args: device IDENTIFY data / SCSI command of interest.
2170 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2171 * @buflen: Response buffer length.
2172 *
2173 * Simulate READ CAPACITY commands.
2174 *
2175 * LOCKING:
cca3974e 2176 * spin_lock_irqsave(host lock)
1da177e4
LT		 2177 */
2178
2179unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2180 unsigned int buflen)
2181{
2182 u64 n_sectors;
2183 u32 tmp;
2184
2185 VPRINTK("ENTER\n");
2186
8bf62ece
AL		 2187 if (ata_id_has_lba(args->id)) {
2188 if (ata_id_has_lba48(args->id))
2189 n_sectors = ata_id_u64(args->id, 100);
2190 else
2191 n_sectors = ata_id_u32(args->id, 60);
2192 } else {
2193 /* CHS default translation */
2194 n_sectors = args->id[1] * args->id[3] * args->id[6];
2195
2196 if (ata_id_current_chs_valid(args->id))
2197 /* CHS current translation */
2198 n_sectors = ata_id_u32(args->id, 57);
2199 }
2200
1da177e4
LT		 2201 n_sectors--; /* ATA TotalUserSectors - 1 */
2202
1da177e4 2203 if (args->cmd->cmnd[0] == READ_CAPACITY) {
0c144d0d
PP		 2204 if( n_sectors >= 0xffffffffULL )
2205 tmp = 0xffffffff ; /* Return max count on overflow */
2206 else
2207 tmp = n_sectors ;
2208
1da177e4
LT		 2209 /* sector count, 32-bit */
2210 rbuf[0] = tmp >> (8 * 3);
2211 rbuf[1] = tmp >> (8 * 2);
2212 rbuf[2] = tmp >> (8 * 1);
2213 rbuf[3] = tmp;
2214
2215 /* sector size */
2216 tmp = ATA_SECT_SIZE;
2217 rbuf[6] = tmp >> 8;
2218 rbuf[7] = tmp;
2219
2220 } else {
2221 /* sector count, 64-bit */
0c144d0d
PP		 2222 tmp = n_sectors >> (8 * 4);
2223 rbuf[2] = tmp >> (8 * 3);
2224 rbuf[3] = tmp >> (8 * 2);
2225 rbuf[4] = tmp >> (8 * 1);
2226 rbuf[5] = tmp;
2227 tmp = n_sectors;
1da177e4
LT		 2228 rbuf[6] = tmp >> (8 * 3);
2229 rbuf[7] = tmp >> (8 * 2);
2230 rbuf[8] = tmp >> (8 * 1);
2231 rbuf[9] = tmp;
2232
2233 /* sector size */
2234 tmp = ATA_SECT_SIZE;
2235 rbuf[12] = tmp >> 8;
2236 rbuf[13] = tmp;
2237 }
2238
2239 return 0;
2240}
2241
2242/**
2243 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2244 * @args: device IDENTIFY data / SCSI command of interest.
2245 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2246 * @buflen: Response buffer length.
2247 *
2248 * Simulate REPORT LUNS command.
2249 *
2250 * LOCKING:
cca3974e 2251 * spin_lock_irqsave(host lock)
1da177e4
LT		 2252 */
2253
2254unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2255 unsigned int buflen)
2256{
2257 VPRINTK("ENTER\n");
2258 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2259
2260 return 0;
2261}
2262
845c5834
DG		 2263/**
2264 * ata_scsi_set_sense - Set SCSI sense data and status
2265 * @cmd: SCSI request to be handled
2266 * @sk: SCSI-defined sense key
2267 * @asc: SCSI-defined additional sense code
2268 * @ascq: SCSI-defined additional sense code qualifier
2269 *
2270 * Helper function that builds a valid fixed format, current
2271 * response code and the given sense key (sk), additional sense
2272 * code (asc) and additional sense code qualifier (ascq) with
2273 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2274 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2275 *
2276 * LOCKING:
2277 * Not required
2278 */
2279
2280void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2281{
2282 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2283
2284 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2285 cmd->sense_buffer[2] = sk;
2286 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2287 cmd->sense_buffer[12] = asc;
2288 cmd->sense_buffer[13] = ascq;
2289}
2290
1da177e4
LT		 2291/**
2292 * ata_scsi_badcmd - End a SCSI request with an error
2293 * @cmd: SCSI request to be handled
2294 * @done: SCSI command completion function
2295 * @asc: SCSI-defined additional sense code
2296 * @ascq: SCSI-defined additional sense code qualifier
2297 *
2298 * Helper function that completes a SCSI command with
2299 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2300 * and the specified additional sense codes.
2301 *
2302 * LOCKING:
cca3974e 2303 * spin_lock_irqsave(host lock)
1da177e4
LT		 2304 */
2305
2306void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2307{
2308 DPRINTK("ENTER\n");
ae006510 2309 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2310
2311 done(cmd);
2312}
2313
77853bf2 2314static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2315{
74e6c8c3 2316 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2317 /* FIXME: not quite right; we don't want the
2318 * translation of taskfile registers into
2319 * a sense descriptors, since that's only
2320 * correct for ATA, not ATAPI
2321 */
2322 ata_gen_ata_desc_sense(qc);
74e6c8c3 2323 }
a939c963 2324
c6e6e666 2325 qc->scsidone(qc->scsicmd);
77853bf2 2326 ata_qc_free(qc);
c6e6e666 2327}
a939c963 2328
c6e6e666
JG		 2329/* is it pointless to prefer PIO for "safety reasons"? */
2330static inline int ata_pio_use_silly(struct ata_port *ap)
2331{
2332 return (ap->flags & ATA_FLAG_PIO_DMA);
2333}
2334
2335static void atapi_request_sense(struct ata_queued_cmd *qc)
2336{
2337 struct ata_port *ap = qc->ap;
2338 struct scsi_cmnd *cmd = qc->scsicmd;
2339
2340 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2341
2342 /* FIXME: is this needed? */
2343 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2344
c6e6e666
JG		 2345 ap->ops->tf_read(ap, &qc->tf);
2346
2347 /* fill these in, for the case where they are -not- overwritten */
2348 cmd->sense_buffer[0] = 0x70;
2349 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2350
2351 ata_qc_reinit(qc);
2352
a939c963
JG		 2353 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2354 qc->dma_dir = DMA_FROM_DEVICE;
2355
6e7846e9 2356 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2357 qc->cdb[0] = REQUEST_SENSE;
2358 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2359
2360 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2361 qc->tf.command = ATA_CMD_PACKET;
2362
c6e6e666
JG		 2363 if (ata_pio_use_silly(ap)) {
2364 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2365 qc->tf.feature |= ATAPI_PKT_DMA;
2366 } else {
2367 qc->tf.protocol = ATA_PROT_ATAPI;
2368 qc->tf.lbam = (8 * 1024) & 0xff;
2369 qc->tf.lbah = (8 * 1024) >> 8;
2370 }
a939c963
JG		 2371 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2372
c6e6e666 2373 qc->complete_fn = atapi_sense_complete;
a939c963 2374
8e0e694a 2375 ata_qc_issue(qc);
a939c963
JG		 2376
2377 DPRINTK("EXIT\n");
2378}
2379
77853bf2 2380static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2381{
2382 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2383 unsigned int err_mask = qc->err_mask;
1da177e4 2384
a7dac447 2385 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2386
246619da
TH		 2387 /* handle completion from new EH */
2388 if (unlikely(qc->ap->ops->error_handler &&
2389 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2390
2391 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2392 /* FIXME: not quite right; we don't want the
2393 * translation of taskfile registers into a
2394 * sense descriptors, since that's only
2395 * correct for ATA, not ATAPI
2396 */
2397 ata_gen_ata_desc_sense(qc);
2398 }
2399
22aac089
TH		 2400 /* SCSI EH automatically locks door if sdev->locked is
2401 * set. Sometimes door lock request continues to
2402 * fail, for example, when no media is present. This
2403 * creates a loop - SCSI EH issues door lock which
2404 * fails and gets invoked again to acquire sense data
2405 * for the failed command.
2406 *
2407 * If door lock fails, always clear sdev->locked to
2408 * avoid this infinite loop.
2409 */
2410 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2411 qc->dev->sdev->locked = 0;
2412
246619da
TH		 2413 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2414 qc->scsidone(cmd);
2415 ata_qc_free(qc);
2416 return;
2417 }
2418
2419 /* successful completion or old EH failure path */
a7dac447 2420 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2421 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2422 atapi_request_sense(qc);
77853bf2 2423 return;
74e6c8c3 2424 } else if (unlikely(err_mask)) {
a7dac447
JG		 2425 /* FIXME: not quite right; we don't want the
2426 * translation of taskfile registers into
2427 * a sense descriptors, since that's only
2428 * correct for ATA, not ATAPI
2429 */
2430 ata_gen_ata_desc_sense(qc);
74e6c8c3 2431 } else {
1da177e4
LT		 2432 u8 *scsicmd = cmd->cmnd;
2433
fd71da46 2434 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2435 u8 *buf = NULL;
2436 unsigned int buflen;
2437
2438 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2439
2440 /* ATAPI devices typically report zero for their SCSI version,
2441 * and sometimes deviate from the spec WRT response data
2442 * format. If SCSI version is reported as zero like normal,
2443 * then we make the following fixups: 1) Fake MMC-5 version,
2444 * to indicate to the Linux scsi midlayer this is a modern
2445 * device. 2) Ensure response data format / ATAPI information
2446 * are always correct.
a15dbeb4
JG		 2447 */
2448 if (buf[2] == 0) {
2449 buf[2] = 0x5;
2450 buf[3] = 0x32;
2451 }
2452
1da177e4
LT		 2453 ata_scsi_rbuf_put(cmd, buf);
2454 }
a15dbeb4 2455
1da177e4
LT		 2456 cmd->result = SAM_STAT_GOOD;
2457 }
2458
2459 qc->scsidone(cmd);
77853bf2 2460 ata_qc_free(qc);
1da177e4
LT		 2461}
2462/**
2463 * atapi_xlat - Initialize PACKET taskfile
2464 * @qc: command structure to be initialized
2465 * @scsicmd: SCSI CDB associated with this PACKET command
2466 *
2467 * LOCKING:
cca3974e 2468 * spin_lock_irqsave(host lock)
1da177e4
LT		 2469 *
2470 * RETURNS:
2471 * Zero on success, non-zero on failure.
2472 */
2473
057ace5e 2474static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 2475{
2476 struct scsi_cmnd *cmd = qc->scsicmd;
2477 struct ata_device *dev = qc->dev;
2478 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db055 2479 int nodata = (cmd->sc_data_direction == DMA_NONE);
1da177e4
LT		 2480
2481 if (!using_pio)
2482 /* Check whether ATAPI DMA is safe */
2483 if (ata_check_atapi_dma(qc))
2484 using_pio = 1;
2485
6e7846e9 2486 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
1da177e4
LT		 2487
2488 qc->complete_fn = atapi_qc_complete;
2489
2490 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db055 2491 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2492 qc->tf.flags |= ATA_TFLAG_WRITE;
2493 DPRINTK("direction: write\n");
2494 }
2495
2496 qc->tf.command = ATA_CMD_PACKET;
2497
2498 /* no data, or PIO data xfer */
2499 if (using_pio || nodata) {
2500 if (nodata)
2501 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2502 else
2503 qc->tf.protocol = ATA_PROT_ATAPI;
2504 qc->tf.lbam = (8 * 1024) & 0xff;
2505 qc->tf.lbah = (8 * 1024) >> 8;
2506 }
2507
2508 /* DMA data xfer */
2509 else {
2510 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2511 qc->tf.feature |= ATAPI_PKT_DMA;
2512
95de719a
AL		 2513 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2514 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2515 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2516 }
2517
5d5ff44f 2518 qc->nbytes = cmd->request_bufflen;
1da177e4
LT		 2519
2520 return 0;
2521}
2522
ab5b3a5b
TH		 2523static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2524{
2525 if (likely(id < ATA_MAX_DEVICES))
2526 return &ap->device[id];
2527 return NULL;
2528}
2529
2530static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2531 const struct scsi_device *scsidev)
2532{
2533 /* skip commands not addressed to targets we simulate */
2534 if (unlikely(scsidev->channel || scsidev->lun))
2535 return NULL;
2536
2537 return ata_find_dev(ap, scsidev->id);
2538}
2539
99ba9e09
BK		 2540/**
2541 * ata_scsi_dev_enabled - determine if device is enabled
2542 * @dev: ATA device
2543 *
2544 * Determine if commands should be sent to the specified device.
2545 *
2546 * LOCKING:
cca3974e 2547 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2548 *
2549 * RETURNS:
2550 * 0 if commands are not allowed / 1 if commands are allowed
2551 */
2552
2553static int ata_scsi_dev_enabled(struct ata_device *dev)
2554{
2555 if (unlikely(!ata_dev_enabled(dev)))
2556 return 0;
2557
2558 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2559 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2560 ata_dev_printk(dev, KERN_WARNING,
2561 "WARNING: ATAPI is %s, device ignored.\n",
2562 atapi_enabled ? "not supported with this driver" : "disabled");
2563 return 0;
2564 }
2565 }
2566
2567 return 1;
2568}
2569
1da177e4
LT		 2570/**
2571 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2572 * @ap: ATA port to which the device is attached
2573 * @scsidev: SCSI device from which we derive the ATA device
2574 *
2575 * Given various information provided in struct scsi_cmnd,
2576 * map that onto an ATA bus, and using that mapping
2577 * determine which ata_device is associated with the
2578 * SCSI command to be sent.
2579 *
2580 * LOCKING:
cca3974e 2581 * spin_lock_irqsave(host lock)
1da177e4
LT		 2582 *
2583 * RETURNS:
2584 * Associated ATA device, or %NULL if not found.
2585 */
1da177e4 2586static struct ata_device *
057ace5e 2587ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2588{
ab5b3a5b 2589 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2590
99ba9e09 2591 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2592 return NULL;
2593
1da177e4
LT		 2594 return dev;
2595}
2596
b095518e
JG		 2597/*
2598 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2599 * @byte1: Byte 1 from pass-thru CDB.
2600 *
2601 * RETURNS:
2602 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2603 */
2604static u8
2605ata_scsi_map_proto(u8 byte1)
2606{
2607 switch((byte1 & 0x1e) >> 1) {
2608 case 3: /* Non-data */
2609 return ATA_PROT_NODATA;
2610
2611 case 6: /* DMA */
2612 return ATA_PROT_DMA;
2613
2614 case 4: /* PIO Data-in */
2615 case 5: /* PIO Data-out */
b095518e
JG		 2616 return ATA_PROT_PIO;
2617
2618 case 10: /* Device Reset */
2619 case 0: /* Hard Reset */
2620 case 1: /* SRST */
2621 case 2: /* Bus Idle */
2622 case 7: /* Packet */
2623 case 8: /* DMA Queued */
2624 case 9: /* Device Diagnostic */
2625 case 11: /* UDMA Data-in */
2626 case 12: /* UDMA Data-Out */
2627 case 13: /* FPDMA */
2628 default: /* Reserved */
2629 break;
2630 }
2631
2632 return ATA_PROT_UNKNOWN;
2633}
2634
2635/**
2636 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2637 * @qc: command structure to be initialized
8e8b77dd 2638 * @scsicmd: SCSI command to convert
b095518e
JG		 2639 *
2640 * Handles either 12 or 16-byte versions of the CDB.
2641 *
2642 * RETURNS:
2643 * Zero on success, non-zero on failure.
2644 */
2645static unsigned int
00ac37f5 2646ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
b095518e
JG		 2647{
2648 struct ata_taskfile *tf = &(qc->tf);
2649 struct scsi_cmnd *cmd = qc->scsicmd;
f79d409f 2650 struct ata_device *dev = qc->dev;
b095518e
JG		 2651
2652 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
9a405257 2653 goto invalid_fld;
8190bdb9 2654
f79d409f
AC		 2655 /* We may not issue DMA commands if no DMA mode is set */
2656 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2657 goto invalid_fld;
b095518e 2658
f59b0cf8
AL		 2659 if (scsicmd[1] & 0xe0)
2660 /* PIO multi not supported yet */
2661 goto invalid_fld;
2662
b095518e
JG		 2663 /*
2664 * 12 and 16 byte CDBs use different offsets to
2665 * provide the various register values.
2666 */
2667 if (scsicmd[0] == ATA_16) {
2668 /*
2669 * 16-byte CDB - may contain extended commands.
2670 *
2671 * If that is the case, copy the upper byte register values.
2672 */
2673 if (scsicmd[1] & 0x01) {
2674 tf->hob_feature = scsicmd[3];
2675 tf->hob_nsect = scsicmd[5];
2676 tf->hob_lbal = scsicmd[7];
2677 tf->hob_lbam = scsicmd[9];
2678 tf->hob_lbah = scsicmd[11];
2679 tf->flags |= ATA_TFLAG_LBA48;
2680 } else
2681 tf->flags &= ~ATA_TFLAG_LBA48;
2682
2683 /*
2684 * Always copy low byte, device and command registers.
2685 */
2686 tf->feature = scsicmd[4];
2687 tf->nsect = scsicmd[6];
2688 tf->lbal = scsicmd[8];
2689 tf->lbam = scsicmd[10];
2690 tf->lbah = scsicmd[12];
2691 tf->device = scsicmd[13];
2692 tf->command = scsicmd[14];
2693 } else {
2694 /*
2695 * 12-byte CDB - incapable of extended commands.
2696 */
2697 tf->flags &= ~ATA_TFLAG_LBA48;
2698
2699 tf->feature = scsicmd[3];
2700 tf->nsect = scsicmd[4];
2701 tf->lbal = scsicmd[5];
2702 tf->lbam = scsicmd[6];
2703 tf->lbah = scsicmd[7];
2704 tf->device = scsicmd[8];
2705 tf->command = scsicmd[9];
2706 }
dcc2d1e7
ML		 2707 /*
2708 * If slave is possible, enforce correct master/slave bit
2709 */
2710 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2711 tf->device = qc->dev->devno ?
2712 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e
JG		 2713
2714 /*
2715 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2716 * SET_FEATURES - XFER MODE must be preceded/succeeded
2717 * by an update to hardware-specific registers for each
2718 * controller (i.e. the reason for ->set_piomode(),
2719 * ->set_dmamode(), and ->post_set_mode() hooks).
2720 */
2721 if ((tf->command == ATA_CMD_SET_FEATURES)
2722 && (tf->feature == SETFEATURES_XFER))
9a405257 2723 goto invalid_fld;
b095518e
JG		 2724
2725 /*
2726 * Set flags so that all registers will be written,
2727 * and pass on write indication (used for PIO/DMA
2728 * setup.)
2729 */
2730 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2731
0274aa25 2732 if (cmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2733 tf->flags |= ATA_TFLAG_WRITE;
2734
2735 /*
2736 * Set transfer length.
2737 *
2738 * TODO: find out if we need to do more here to
2739 * cover scatter/gather case.
2740 */
5d5ff44f 2741 qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
b095518e 2742
e61e0672
TH		 2743 /* request result TF */
2744 qc->flags |= ATA_QCFLAG_RESULT_TF;
2745
b095518e 2746 return 0;
9a405257
TH		 2747
2748 invalid_fld:
2749 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2750 /* "Invalid field in cdb" */
2751 return 1;
b095518e
JG		 2752}
2753
1da177e4
LT		 2754/**
2755 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2756 * @dev: ATA device
2757 * @cmd: SCSI command opcode to consider
2758 *
2759 * Look up the SCSI command given, and determine whether the
2760 * SCSI command is to be translated or simulated.
2761 *
2762 * RETURNS:
2763 * Pointer to translation function if possible, %NULL if not.
2764 */
2765
2766static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2767{
2768 switch (cmd) {
2769 case READ_6:
2770 case READ_10:
2771 case READ_16:
2772
2773 case WRITE_6:
2774 case WRITE_10:
2775 case WRITE_16:
2776 return ata_scsi_rw_xlat;
2777
2778 case SYNCHRONIZE_CACHE:
2779 if (ata_try_flush_cache(dev))
2780 return ata_scsi_flush_xlat;
2781 break;
2782
2783 case VERIFY:
2784 case VERIFY_16:
2785 return ata_scsi_verify_xlat;
b095518e
JG		 2786
2787 case ATA_12:
2788 case ATA_16:
2789 return ata_scsi_pass_thru;
da61396d 2790
972dcafb
DG		 2791 case START_STOP:
2792 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2793 }
2794
2795 return NULL;
2796}
2797
2798/**
2799 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2800 * @ap: ATA port to which the command was being sent
2801 * @cmd: SCSI command to dump
2802 *
2803 * Prints the contents of a SCSI command via printk().
2804 */
2805
2806static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2807 struct scsi_cmnd *cmd)
2808{
2809#ifdef ATA_DEBUG
2810 struct scsi_device *scsidev = cmd->device;
2811 u8 *scsicmd = cmd->cmnd;
2812
2813 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2814 ap->id,
2815 scsidev->channel, scsidev->id, scsidev->lun,
2816 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2817 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2818 scsicmd[8]);
2819#endif
2820}
2821
2115ea94
TH		 2822static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2823 void (*done)(struct scsi_cmnd *),
2824 struct ata_device *dev)
eb3f0f9c 2825{
2115ea94
TH		 2826 int rc = 0;
2827
eb3f0f9c
BK		 2828 if (dev->class == ATA_DEV_ATA) {
2829 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2830 cmd->cmnd[0]);
2831
2832 if (xlat_func)
2115ea94 2833 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
eb3f0f9c 2834 else
3373efd8 2835 ata_scsi_simulate(dev, cmd, done);
eb3f0f9c 2836 } else
2115ea94
TH		 2837 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2838
2839 return rc;
eb3f0f9c
BK		 2840}
2841
1da177e4
LT		 2842/**
2843 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2844 * @cmd: SCSI command to be sent
2845 * @done: Completion function, called when command is complete
2846 *
2847 * In some cases, this function translates SCSI commands into
2848 * ATA taskfiles, and queues the taskfiles to be sent to
2849 * hardware. In other cases, this function simulates a
2850 * SCSI device by evaluating and responding to certain
2851 * SCSI commands. This creates the overall effect of
2852 * ATA and ATAPI devices appearing as SCSI devices.
2853 *
2854 * LOCKING:
cca3974e 2855 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2856 *
2857 * RETURNS:
2115ea94
TH		 2858 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2859 * 0 otherwise.
1da177e4 2860 */
1da177e4
LT		 2861int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2862{
2863 struct ata_port *ap;
2864 struct ata_device *dev;
2865 struct scsi_device *scsidev = cmd->device;
005a5a06 2866 struct Scsi_Host *shost = scsidev->host;
2115ea94 2867 int rc = 0;
1da177e4 2868
35bb94b1 2869 ap = ata_shost_to_port(shost);
005a5a06
JG		 2870
2871 spin_unlock(shost->host_lock);
ba6a1308 2872 spin_lock(ap->lock);
1da177e4
LT		 2873
2874 ata_scsi_dump_cdb(ap, cmd);
2875
2876 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2877 if (likely(dev))
2115ea94 2878 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2879 else {
1da177e4
LT		 2880 cmd->result = (DID_BAD_TARGET << 16);
2881 done(cmd);
1da177e4
LT		 2882 }
2883
ba6a1308 2884 spin_unlock(ap->lock);
005a5a06 2885 spin_lock(shost->host_lock);
2115ea94 2886 return rc;
1da177e4
LT		 2887}
2888
2889/**
2890 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2891 * @dev: the target device
1da177e4
LT		 2892 * @cmd: SCSI command being sent to device.
2893 * @done: SCSI command completion function.
2894 *
2895 * Interprets and directly executes a select list of SCSI commands
2896 * that can be handled internally.
2897 *
2898 * LOCKING:
cca3974e 2899 * spin_lock_irqsave(host lock)
1da177e4
LT		 2900 */
2901
3373efd8 2902void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2903 void (*done)(struct scsi_cmnd *))
2904{
2905 struct ata_scsi_args args;
057ace5e 2906 const u8 *scsicmd = cmd->cmnd;
1da177e4 2907
9a3dccc4
TH		 2908 args.dev = dev;
2909 args.id = dev->id;
1da177e4
LT		 2910 args.cmd = cmd;
2911 args.done = done;
2912
2913 switch(scsicmd[0]) {
2914 /* no-op's, complete with success */
2915 case SYNCHRONIZE_CACHE:
2916 case REZERO_UNIT:
2917 case SEEK_6:
2918 case SEEK_10:
2919 case TEST_UNIT_READY:
2920 case FORMAT_UNIT: /* FIXME: correct? */
2921 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2922 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2923 break;
2924
2925 case INQUIRY:
2926 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2927 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2928 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2929 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2930 else if (scsicmd[2] == 0x00)
2931 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2932 else if (scsicmd[2] == 0x80)
2933 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2934 else if (scsicmd[2] == 0x83)
2935 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2936 else
ae006510 2937 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2938 break;
2939
2940 case MODE_SENSE:
2941 case MODE_SENSE_10:
2942 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2943 break;
2944
2945 case MODE_SELECT: /* unconditionally return */
2946 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2947 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2948 break;
2949
2950 case READ_CAPACITY:
2951 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2952 break;
2953
2954 case SERVICE_ACTION_IN:
2955 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2956 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2957 else
ae006510 2958 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2959 break;
2960
2961 case REPORT_LUNS:
2962 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2963 break;
2964
b095518e 2965 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2966 case REQUEST_SENSE:
2967
2968 /* all other commands */
2969 default:
ae006510
DG		 2970 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2971 /* "Invalid command operation code" */
2972 done(cmd);
1da177e4
LT		 2973 break;
2974 }
2975}
2976
644dd0cc
JG		 2977void ata_scsi_scan_host(struct ata_port *ap)
2978{
2979 unsigned int i;
2980
198e0fed 2981 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2982 return;
2983
3f19ee8c 2984 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3edebac4
TH		 2985 struct ata_device *dev = &ap->device[i];
2986 struct scsi_device *sdev;
2987
2988 if (!ata_dev_enabled(dev) || dev->sdev)
2989 continue;
3f19ee8c 2990
cca3974e 2991 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
3edebac4
TH		 2992 if (!IS_ERR(sdev)) {
2993 dev->sdev = sdev;
2994 scsi_device_put(sdev);
2995 }
3f19ee8c 2996 }
644dd0cc 2997}
0ea035a3
TH		 2998
2999/**
3000 * ata_scsi_offline_dev - offline attached SCSI device
3001 * @dev: ATA device to offline attached SCSI device for
3002 *
3003 * This function is called from ata_eh_hotplug() and responsible
3004 * for taking the SCSI device attached to @dev offline. This
cca3974e 3005 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3006 * against clearing.
3007 *
3008 * LOCKING:
cca3974e 3009 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3010 *
3011 * RETURNS:
3012 * 1 if attached SCSI device exists, 0 otherwise.
3013 */
3014int ata_scsi_offline_dev(struct ata_device *dev)
3015{
3016 if (dev->sdev) {
3017 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3018 return 1;
3019 }
3020 return 0;
3021}
580b2102
TH		 3022
3023/**
3024 * ata_scsi_remove_dev - remove attached SCSI device
3025 * @dev: ATA device to remove attached SCSI device for
3026 *
3027 * This function is called from ata_eh_scsi_hotplug() and
3028 * responsible for removing the SCSI device attached to @dev.
3029 *
3030 * LOCKING:
3031 * Kernel thread context (may sleep).
3032 */
3033static void ata_scsi_remove_dev(struct ata_device *dev)
3034{
3035 struct ata_port *ap = dev->ap;
3036 struct scsi_device *sdev;
3037 unsigned long flags;
3038
3039 /* Alas, we need to grab scan_mutex to ensure SCSI device
3040 * state doesn't change underneath us and thus
3041 * scsi_device_get() always succeeds. The mutex locking can
3042 * be removed if there is __scsi_device_get() interface which
3043 * increments reference counts regardless of device state.
3044 */
cca3974e 3045 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3046 spin_lock_irqsave(ap->lock, flags);
580b2102 3047
cca3974e 3048 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3049 sdev = dev->sdev;
3050 dev->sdev = NULL;
3051
3052 if (sdev) {
3053 /* If user initiated unplug races with us, sdev can go
cca3974e 3054 * away underneath us after the host lock and
580b2102
TH		 3055 * scan_mutex are released. Hold onto it.
3056 */
3057 if (scsi_device_get(sdev) == 0) {
3058 /* The following ensures the attached sdev is
3059 * offline on return from ata_scsi_offline_dev()
3060 * regardless it wins or loses the race
3061 * against this function.
3062 */
3063 scsi_device_set_state(sdev, SDEV_OFFLINE);
3064 } else {
3065 WARN_ON(1);
3066 sdev = NULL;
3067 }
3068 }
3069
ba6a1308 3070 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3071 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3072
3073 if (sdev) {
3074 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3075 sdev->sdev_gendev.bus_id);
3076
3077 scsi_remove_device(sdev);
3078 scsi_device_put(sdev);
3079 }
3080}
3081
3082/**
3083 * ata_scsi_hotplug - SCSI part of hotplug
3084 * @data: Pointer to ATA port to perform SCSI hotplug on
3085 *
3086 * Perform SCSI part of hotplug. It's executed from a separate
3087 * workqueue after EH completes. This is necessary because SCSI
3088 * hot plugging requires working EH and hot unplugging is
3089 * synchronized with hot plugging with a mutex.
3090 *
3091 * LOCKING:
3092 * Kernel thread context (may sleep).
3093 */
3094void ata_scsi_hotplug(void *data)
3095{
3096 struct ata_port *ap = data;
3097 int i;
3098
b51e9e5d 3099 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3100 DPRINTK("ENTER/EXIT - unloading\n");
3101 return;
3102 }
3103
3104 DPRINTK("ENTER\n");
3105
3106 /* unplug detached devices */
3107 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3108 struct ata_device *dev = &ap->device[i];
3109 unsigned long flags;
3110
3111 if (!(dev->flags & ATA_DFLAG_DETACHED))
3112 continue;
3113
ba6a1308 3114 spin_lock_irqsave(ap->lock, flags);
580b2102 3115 dev->flags &= ~ATA_DFLAG_DETACHED;
ba6a1308 3116 spin_unlock_irqrestore(ap->lock, flags);
580b2102
TH		 3117
3118 ata_scsi_remove_dev(dev);
3119 }
3120
3121 /* scan for new ones */
3122 ata_scsi_scan_host(ap);
3123
3124 /* If we scanned while EH was in progress, scan would have
3125 * failed silently. Requeue if there are enabled but
3126 * unattached devices.
3127 */
3128 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3129 struct ata_device *dev = &ap->device[i];
3130 if (ata_dev_enabled(dev) && !dev->sdev) {
3131 queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
3132 break;
3133 }
3134 }
3135
3136 DPRINTK("EXIT\n");
3137}
83c47bcb
TH		 3138
3139/**
3140 * ata_scsi_user_scan - indication for user-initiated bus scan
3141 * @shost: SCSI host to scan
3142 * @channel: Channel to scan
3143 * @id: ID to scan
3144 * @lun: LUN to scan
3145 *
3146 * This function is called when user explicitly requests bus
3147 * scan. Set probe pending flag and invoke EH.
3148 *
3149 * LOCKING:
3150 * SCSI layer (we don't care)
3151 *
3152 * RETURNS:
3153 * Zero.
3154 */
3155static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3156 unsigned int id, unsigned int lun)
3157{
3158 struct ata_port *ap = ata_shost_to_port(shost);
3159 unsigned long flags;
3160 int rc = 0;
3161
3162 if (!ap->ops->error_handler)
3163 return -EOPNOTSUPP;
3164
3165 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3166 (lun != SCAN_WILD_CARD && lun != 0))
3167 return -EINVAL;
3168
ba6a1308 3169 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 3170
3171 if (id == SCAN_WILD_CARD) {
3172 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3173 ap->eh_info.action |= ATA_EH_SOFTRESET;
3174 } else {
3175 struct ata_device *dev = ata_find_dev(ap, id);
3176
3177 if (dev) {
3178 ap->eh_info.probe_mask |= 1 << dev->devno;
3179 ap->eh_info.action |= ATA_EH_SOFTRESET;
28324304 3180 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3181 } else
3182 rc = -EINVAL;
3183 }
3184
309afcb5 3185 if (rc == 0) {
83c47bcb 3186 ata_port_schedule_eh(ap);
309afcb5
TH		 3187 spin_unlock_irqrestore(ap->lock, flags);
3188 ata_port_wait_eh(ap);
3189 } else
3190 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3191
3192 return rc;
3193}
3057ac3c 3194
3195/**
d0171269
TH		 3196 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3197 * @data: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3198 *
d0171269
TH		 3199 * After ATA pass thru (SAT) commands are executed successfully,
3200 * libata need to propagate the changes to SCSI layer. This
3201 * function must be executed from ata_aux_wq such that sdev
3202 * attach/detach don't race with rescan.
3057ac3c 3203 *
d0171269
TH		 3204 * LOCKING:
3205 * Kernel thread context (may sleep).
3057ac3c 3206 */
3207void ata_scsi_dev_rescan(void *data)
3208{
3209 struct ata_port *ap = data;
3210 struct ata_device *dev;
3211 unsigned int i;
3212
3213 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3214 dev = &ap->device[i];
3215
d0171269 3216 if (ata_dev_enabled(dev) && dev->sdev)
3057ac3c 3217 scsi_rescan_device(&(dev->sdev->sdev_gendev));
3218 }
3219}
80289167
BK		 3220
3221/**
3222 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3223 * @host: ATA host container for all SAS ports
80289167 3224 * @port_info: Information from low-level host driver
cca3974e 3225 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3226 *
3227 * LOCKING:
3228 * PCI/etc. bus probe sem.
3229 *
3230 * RETURNS:
3231 * ata_port pointer on success / NULL on failure.
3232 */
3233
cca3974e 3234struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3235 struct ata_port_info *port_info,
cca3974e 3236 struct Scsi_Host *shost)
80289167
BK		 3237{
3238 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3239 struct ata_probe_ent *ent;
3240
3241 if (!ap)
3242 return NULL;
3243
cca3974e 3244 ent = ata_probe_ent_alloc(host->dev, port_info);
80289167
BK		 3245 if (!ent) {
3246 kfree(ap);
3247 return NULL;
3248 }
3249
cca3974e
JG		 3250 ata_port_init(ap, host, ent, 0);
3251 ap->lock = shost->host_lock;
80289167
BK		 3252 kfree(ent);
3253 return ap;
3254}
3255EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3256
3257/**
3258 * ata_sas_port_start - Set port up for dma.
3259 * @ap: Port to initialize
3260 *
3261 * Called just after data structures for each port are
3262 * initialized. Allocates DMA pad.
3263 *
3264 * May be used as the port_start() entry in ata_port_operations.
3265 *
3266 * LOCKING:
3267 * Inherited from caller.
3268 */
3269int ata_sas_port_start(struct ata_port *ap)
3270{
3271 return ata_pad_alloc(ap, ap->dev);
3272}
3273EXPORT_SYMBOL_GPL(ata_sas_port_start);
3274
3275/**
3276 * ata_port_stop - Undo ata_sas_port_start()
3277 * @ap: Port to shut down
3278 *
3279 * Frees the DMA pad.
3280 *
3281 * May be used as the port_stop() entry in ata_port_operations.
3282 *
3283 * LOCKING:
3284 * Inherited from caller.
3285 */
3286
3287void ata_sas_port_stop(struct ata_port *ap)
3288{
3289 ata_pad_free(ap, ap->dev);
3290}
3291EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3292
3293/**
3294 * ata_sas_port_init - Initialize a SATA device
3295 * @ap: SATA port to initialize
3296 *
3297 * LOCKING:
3298 * PCI/etc. bus probe sem.
3299 *
3300 * RETURNS:
3301 * Zero on success, non-zero on error.
3302 */
3303
3304int ata_sas_port_init(struct ata_port *ap)
3305{
3306 int rc = ap->ops->port_start(ap);
3307
3308 if (!rc)
3309 rc = ata_bus_probe(ap);
3310
3311 return rc;
3312}
3313EXPORT_SYMBOL_GPL(ata_sas_port_init);
3314
3315/**
3316 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3317 * @ap: SATA port to destroy
3318 *
3319 */
3320
3321void ata_sas_port_destroy(struct ata_port *ap)
3322{
3323 ap->ops->port_stop(ap);
3324 kfree(ap);
3325}
3326EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3327
3328/**
3329 * ata_sas_slave_configure - Default slave_config routine for libata devices
3330 * @sdev: SCSI device to configure
3331 * @ap: ATA port to which SCSI device is attached
3332 *
3333 * RETURNS:
3334 * Zero.
3335 */
3336
3337int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3338{
3339 ata_scsi_sdev_config(sdev);
3340 ata_scsi_dev_config(sdev, ap->device);
3341 return 0;
3342}
3343EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3344
3345/**
3346 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3347 * @cmd: SCSI command to be sent
3348 * @done: Completion function, called when command is complete
3349 * @ap: ATA port to which the command is being sent
3350 *
3351 * RETURNS:
08475a19
BK		 3352 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3353 * 0 otherwise.
80289167
BK		 3354 */
3355
3356int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3357 struct ata_port *ap)
3358{
08475a19
BK		 3359 int rc = 0;
3360
80289167
BK		 3361 ata_scsi_dump_cdb(ap, cmd);
3362
3363 if (likely(ata_scsi_dev_enabled(ap->device)))
08475a19 3364 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
80289167
BK		 3365 else {
3366 cmd->result = (DID_BAD_TARGET << 16);
3367 done(cmd);
3368 }
08475a19 3369 return rc;
80289167
BK		 3370}
3371EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
kernel source for telekom puls (alcatel/mediatek)