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[PATCH] pata_artop: fix "& (1 >>" typo
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ata / libata-scsi.c
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1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
1da177e4 40#include <scsi/scsi_host.h>
beb40487 41#include <scsi/scsi_cmnd.h>
85837ebd 42#include <scsi/scsi_eh.h>
005a5a06 43#include <scsi/scsi_device.h>
a6e6ce8e 44#include <scsi/scsi_tcq.h>
30afc84c 45#include <scsi/scsi_transport.h>
1da177e4 46#include <linux/libata.h>
b095518e 47#include <linux/hdreg.h>
1da177e4
LT		 48#include <asm/uaccess.h>
49
50#include "libata.h"
51
b095518e
JG		 52#define SECTOR_SIZE 512
53
057ace5e 54typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
ab5b3a5b
TH		 55
56static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
83c47bcb
TH		 60static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
ab5b3a5b 62
1da177e4 63
00ac37f5
DG		 64#define RW_RECOVERY_MPAGE 0x1
65#define RW_RECOVERY_MPAGE_LEN 12
66#define CACHE_MPAGE 0x8
67#define CACHE_MPAGE_LEN 20
68#define CONTROL_MPAGE 0xa
69#define CONTROL_MPAGE_LEN 12
70#define ALL_MPAGES 0x3f
71#define ALL_SUB_MPAGES 0xff
72
73
74static const u8 def_rw_recovery_mpage[] = {
75 RW_RECOVERY_MPAGE,
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
80 0, 0, 0, 0,
81 0, /* write retry count */
82 0, 0, 0
83};
84
85static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
86 CACHE_MPAGE,
87 CACHE_MPAGE_LEN - 2,
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
91 0, 0, 0, 0, 0, 0, 0
92};
93
94static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE,
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
101};
102
30afc84c
TH		 103/*
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
106 */
107struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 108 .eh_strategy_handler = ata_scsi_error,
30afc84c 109 .eh_timed_out = ata_scsi_timed_out,
ccf68c34 110 .user_scan = ata_scsi_user_scan,
30afc84c
TH		 111};
112
1da177e4 113
ae006510
DG		 114static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
116{
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
119 done(cmd);
120}
121
1da177e4
LT		 122/**
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
128 *
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
133 *
134 * LOCKING:
135 * Defined by the SCSI layer. We don't really care.
136 *
137 * RETURNS:
138 * Zero.
139 */
140int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
142{
143 geom[0] = 255;
144 geom[1] = 63;
145 sector_div(capacity, 255*63);
146 geom[2] = capacity;
147
148 return 0;
149}
150
b095518e
JG		 151/**
152 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 153 * @scsidev: Device to which we are issuing command
b095518e
JG		 154 * @arg: User provided data for issuing command
155 *
156 * LOCKING:
157 * Defined by the SCSI layer. We don't really care.
158 *
159 * RETURNS:
160 * Zero on success, negative errno on error.
161 */
162
163int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
164{
165 int rc = 0;
166 u8 scsi_cmd[MAX_COMMAND_SIZE];
bbe1fe7e 167 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
b095518e 168 int argsize = 0;
85837ebd 169 enum dma_data_direction data_dir;
bbe1fe7e 170 int cmd_result;
b095518e 171
c893a3ae 172 if (arg == NULL)
b095518e
JG		 173 return -EINVAL;
174
175 if (copy_from_user(args, arg, sizeof(args)))
176 return -EFAULT;
177
bbe1fe7e
ET		 178 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
179 if (!sensebuf)
180 return -ENOMEM;
181
b095518e
JG		 182 memset(scsi_cmd, 0, sizeof(scsi_cmd));
183
184 if (args[3]) {
185 argsize = SECTOR_SIZE * args[3];
186 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 187 if (argbuf == NULL) {
188 rc = -ENOMEM;
189 goto error;
190 }
b095518e
JG		 191
192 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
193 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
194 block count in sector count field */
85837ebd 195 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 196 } else {
197 scsi_cmd[1] = (3 << 1); /* Non-data */
bbe1fe7e 198 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
85837ebd 199 data_dir = DMA_NONE;
b095518e
JG		 200 }
201
202 scsi_cmd[0] = ATA_16;
203
204 scsi_cmd[4] = args[2];
205 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
206 scsi_cmd[6] = args[3];
207 scsi_cmd[8] = args[1];
208 scsi_cmd[10] = 0x4f;
209 scsi_cmd[12] = 0xc2;
210 } else {
211 scsi_cmd[6] = args[1];
212 }
213 scsi_cmd[14] = args[0];
214
215 /* Good values for timeout and retries? Values below
216 from scsi_ioctl_send_command() for default case... */
bbe1fe7e
ET		 217 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
218 sensebuf, (10*HZ), 5, 0);
219
220 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
221 u8 *desc = sensebuf + 8;
222 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
223
224 /* If we set cc then ATA pass-through will cause a
225 * check condition even if no error. Filter that. */
226 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
227 struct scsi_sense_hdr sshdr;
228 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
229 &sshdr);
230 if (sshdr.sense_key==0 &&
231 sshdr.asc==0 && sshdr.ascq==0)
232 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
233 }
234
235 /* Send userspace a few ATA registers (same as drivers/ide) */
236 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
237 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
238 args[0] = desc[13]; /* status */
239 args[1] = desc[3]; /* error */
240 args[2] = desc[5]; /* sector count (0:7) */
241 if (copy_to_user(arg, args, sizeof(args)))
242 rc = -EFAULT;
243 }
244 }
245
246
247 if (cmd_result) {
b095518e
JG		 248 rc = -EIO;
249 goto error;
250 }
251
b095518e 252 if ((argbuf)
c893a3ae 253 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 254 rc = -EFAULT;
255error:
bbe1fe7e 256 kfree(sensebuf);
8f760780 257 kfree(argbuf);
b095518e
JG		 258 return rc;
259}
260
261/**
262 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 263 * @scsidev: Device to which we are issuing command
b095518e
JG		 264 * @arg: User provided data for issuing command
265 *
266 * LOCKING:
267 * Defined by the SCSI layer. We don't really care.
268 *
269 * RETURNS:
270 * Zero on success, negative errno on error.
271 */
272int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
273{
274 int rc = 0;
275 u8 scsi_cmd[MAX_COMMAND_SIZE];
276 u8 args[7];
85837ebd 277 struct scsi_sense_hdr sshdr;
b095518e 278
c893a3ae 279 if (arg == NULL)
b095518e
JG		 280 return -EINVAL;
281
282 if (copy_from_user(args, arg, sizeof(args)))
283 return -EFAULT;
284
285 memset(scsi_cmd, 0, sizeof(scsi_cmd));
286 scsi_cmd[0] = ATA_16;
287 scsi_cmd[1] = (3 << 1); /* Non-data */
288 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
289 scsi_cmd[4] = args[1];
290 scsi_cmd[6] = args[2];
291 scsi_cmd[8] = args[3];
292 scsi_cmd[10] = args[4];
293 scsi_cmd[12] = args[5];
294 scsi_cmd[14] = args[0];
295
b095518e 296 /* Good values for timeout and retries? Values below
2e9edbf8 297 from scsi_ioctl_send_command() for default case... */
85837ebd
MC		 298 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
299 (10*HZ), 5))
b095518e 300 rc = -EIO;
b095518e
JG		 301
302 /* Need code to retrieve data from check condition? */
b095518e
JG		 303 return rc;
304}
305
1da177e4
LT		 306int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
307{
1da177e4
LT		 308 int val = -EINVAL, rc = -EINVAL;
309
1da177e4
LT		 310 switch (cmd) {
311 case ATA_IOC_GET_IO32:
312 val = 0;
313 if (copy_to_user(arg, &val, 1))
314 return -EFAULT;
315 return 0;
316
317 case ATA_IOC_SET_IO32:
318 val = (unsigned long) arg;
319 if (val != 0)
320 return -EINVAL;
321 return 0;
322
b095518e
JG		 323 case HDIO_DRIVE_CMD:
324 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
325 return -EACCES;
326 return ata_cmd_ioctl(scsidev, arg);
327
328 case HDIO_DRIVE_TASK:
329 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
330 return -EACCES;
331 return ata_task_ioctl(scsidev, arg);
332
1da177e4
LT		 333 default:
334 rc = -ENOTTY;
335 break;
336 }
337
1da177e4
LT		 338 return rc;
339}
340
341/**
342 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 343 * @dev: ATA device to which the new command is attached
344 * @cmd: SCSI command that originated this ATA command
345 * @done: SCSI command completion function
346 *
347 * Obtain a reference to an unused ata_queued_cmd structure,
348 * which is the basic libata structure representing a single
349 * ATA command sent to the hardware.
350 *
351 * If a command was available, fill in the SCSI-specific
352 * portions of the structure with information on the
353 * current command.
354 *
355 * LOCKING:
cca3974e 356 * spin_lock_irqsave(host lock)
1da177e4
LT		 357 *
358 * RETURNS:
359 * Command allocated, or %NULL if none available.
360 */
3373efd8 361struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
1da177e4
LT		 362 struct scsi_cmnd *cmd,
363 void (*done)(struct scsi_cmnd *))
364{
365 struct ata_queued_cmd *qc;
366
3373efd8 367 qc = ata_qc_new_init(dev);
1da177e4
LT		 368 if (qc) {
369 qc->scsicmd = cmd;
370 qc->scsidone = done;
371
372 if (cmd->use_sg) {
cedc9a47 373 qc->__sg = (struct scatterlist *) cmd->request_buffer;
1da177e4
LT		 374 qc->n_elem = cmd->use_sg;
375 } else {
cedc9a47 376 qc->__sg = &qc->sgent;
1da177e4
LT		 377 qc->n_elem = 1;
378 }
379 } else {
380 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
381 done(cmd);
382 }
383
384 return qc;
385}
386
b095518e
JG		 387/**
388 * ata_dump_status - user friendly display of error info
389 * @id: id of the port in question
390 * @tf: ptr to filled out taskfile
391 *
392 * Decode and dump the ATA error/status registers for the user so
393 * that they have some idea what really happened at the non
394 * make-believe layer.
395 *
396 * LOCKING:
397 * inherited from caller
398 */
399void ata_dump_status(unsigned id, struct ata_taskfile *tf)
400{
401 u8 stat = tf->command, err = tf->feature;
402
403 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
404 if (stat & ATA_BUSY) {
405 printk("Busy }\n"); /* Data is not valid in this case */
406 } else {
407 if (stat & 0x40) printk("DriveReady ");
408 if (stat & 0x20) printk("DeviceFault ");
409 if (stat & 0x10) printk("SeekComplete ");
410 if (stat & 0x08) printk("DataRequest ");
411 if (stat & 0x04) printk("CorrectedError ");
412 if (stat & 0x02) printk("Index ");
413 if (stat & 0x01) printk("Error ");
414 printk("}\n");
415
416 if (err) {
417 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
418 if (err & 0x04) printk("DriveStatusError ");
419 if (err & 0x80) {
420 if (err & 0x04) printk("BadCRC ");
421 else printk("Sector ");
422 }
423 if (err & 0x40) printk("UncorrectableError ");
424 if (err & 0x10) printk("SectorIdNotFound ");
425 if (err & 0x02) printk("TrackZeroNotFound ");
426 if (err & 0x01) printk("AddrMarkNotFound ");
427 printk("}\n");
428 }
429 }
430}
431
d6f26d1f
TH		 432/**
433 * ata_scsi_device_suspend - suspend ATA device associated with sdev
434 * @sdev: the SCSI device to suspend
3c5100c1 435 * @mesg: target power management message
d6f26d1f
TH		 436 *
437 * Request suspend EH action on the ATA device associated with
438 * @sdev and wait for the operation to complete.
439 *
440 * LOCKING:
441 * Kernel thread context (may sleep).
442 *
443 * RETURNS:
444 * 0 on success, -errno otherwise.
445 */
3c5100c1 446int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
9b847548 447{
35bb94b1 448 struct ata_port *ap = ata_shost_to_port(sdev->host);
d6f26d1f
TH		 449 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
450 unsigned long flags;
451 unsigned int action;
452 int rc = 0;
453
454 if (!dev)
455 goto out;
456
457 spin_lock_irqsave(ap->lock, flags);
458
459 /* wait for the previous resume to complete */
460 while (dev->flags & ATA_DFLAG_SUSPENDED) {
461 spin_unlock_irqrestore(ap->lock, flags);
462 ata_port_wait_eh(ap);
463 spin_lock_irqsave(ap->lock, flags);
464 }
465
466 /* if @sdev is already detached, nothing to do */
467 if (sdev->sdev_state == SDEV_OFFLINE ||
468 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
469 goto out_unlock;
470
471 /* request suspend */
472 action = ATA_EH_SUSPEND;
3c5100c1 473 if (mesg.event != PM_EVENT_SUSPEND)
d6f26d1f
TH		 474 action |= ATA_EH_PM_FREEZE;
475 ap->eh_info.dev_action[dev->devno] |= action;
476 ap->eh_info.flags |= ATA_EHI_QUIET;
477 ata_port_schedule_eh(ap);
478
479 spin_unlock_irqrestore(ap->lock, flags);
9b847548 480
d6f26d1f
TH		 481 /* wait for EH to do the job */
482 ata_port_wait_eh(ap);
483
484 spin_lock_irqsave(ap->lock, flags);
485
486 /* If @sdev is still attached but the associated ATA device
487 * isn't suspended, the operation failed.
488 */
489 if (sdev->sdev_state != SDEV_OFFLINE &&
490 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
491 !(dev->flags & ATA_DFLAG_SUSPENDED))
492 rc = -EIO;
493
494 out_unlock:
495 spin_unlock_irqrestore(ap->lock, flags);
496 out:
497 if (rc == 0)
3c5100c1 498 sdev->sdev_gendev.power.power_state = mesg;
d6f26d1f 499 return rc;
9b847548
JA		 500}
501
d6f26d1f
TH		 502/**
503 * ata_scsi_device_resume - resume ATA device associated with sdev
504 * @sdev: the SCSI device to resume
505 *
506 * Request resume EH action on the ATA device associated with
507 * @sdev and return immediately. This enables parallel
508 * wakeup/spinup of devices.
509 *
510 * LOCKING:
511 * Kernel thread context (may sleep).
512 *
513 * RETURNS:
514 * 0.
515 */
516int ata_scsi_device_resume(struct scsi_device *sdev)
9b847548 517{
35bb94b1 518 struct ata_port *ap = ata_shost_to_port(sdev->host);
d6f26d1f
TH		 519 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
520 struct ata_eh_info *ehi = &ap->eh_info;
521 unsigned long flags;
522 unsigned int action;
523
524 if (!dev)
525 goto out;
526
527 spin_lock_irqsave(ap->lock, flags);
528
529 /* if @sdev is already detached, nothing to do */
530 if (sdev->sdev_state == SDEV_OFFLINE ||
531 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
532 goto out_unlock;
533
534 /* request resume */
535 action = ATA_EH_RESUME;
536 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
537 __ata_ehi_hotplugged(ehi);
538 else
539 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
540 ehi->dev_action[dev->devno] |= action;
541
542 /* We don't want autopsy and verbose EH messages. Disable
543 * those if we're the only device on this link.
544 */
545 if (ata_port_max_devices(ap) == 1)
546 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
547
548 ata_port_schedule_eh(ap);
549
550 out_unlock:
551 spin_unlock_irqrestore(ap->lock, flags);
552 out:
553 sdev->sdev_gendev.power.power_state = PMSG_ON;
554 return 0;
9b847548
JA		 555}
556
1da177e4
LT		 557/**
558 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 559 * @id: ATA device number
1da177e4 560 * @drv_stat: value contained in ATA status register
b095518e
JG		 561 * @drv_err: value contained in ATA error register
562 * @sk: the sense key we'll fill out
563 * @asc: the additional sense code we'll fill out
564 * @ascq: the additional sense code qualifier we'll fill out
246619da 565 * @verbose: be verbose
1da177e4 566 *
b095518e
JG		 567 * Converts an ATA error into a SCSI error. Fill out pointers to
568 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
569 * format sense blocks.
1da177e4
LT		 570 *
571 * LOCKING:
cca3974e 572 * spin_lock_irqsave(host lock)
1da177e4 573 */
2e9edbf8 574void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
246619da 575 u8 *ascq, int verbose)
1da177e4 576{
b095518e 577 int i;
ffe75ef6 578
1da177e4 579 /* Based on the 3ware driver translation table */
98ac62de 580 static const unsigned char sense_table[][4] = {
1da177e4
LT		 581 /* BBD|ECC|ID|MAR */
582 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
583 /* BBD|ECC|ID */
584 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
585 /* ECC|MC|MARK */
586 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
587 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
588 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
589 /* MC|ID|ABRT|TRK0|MARK */
590 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
591 /* MCR|MARK */
592 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
593 /* Bad address mark */
594 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
595 /* TRK0 */
596 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
597 /* Abort & !ICRC */
598 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
599 /* Media change request */
600 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
601 /* SRV */
602 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
603 /* Media change */
604 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
605 /* ECC */
606 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
607 /* BBD - block marked bad */
608 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
609 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
610 };
98ac62de 611 static const unsigned char stat_table[][4] = {
1da177e4
LT		 612 /* Must be first because BUSY means no other bits valid */
613 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
614 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
615 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
616 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
617 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
618 };
1da177e4 619
1da177e4
LT		 620 /*
621 * Is this an error we can process/parse
622 */
b095518e
JG		 623 if (drv_stat & ATA_BUSY) {
624 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 625 }
b095518e
JG		 626
627 if (drv_err) {
628 /* Look for drv_err */
629 for (i = 0; sense_table[i][0] != 0xFF; i++) {
630 /* Look for best matches first */
2e9edbf8 631 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 632 sense_table[i][0]) {
633 *sk = sense_table[i][1];
634 *asc = sense_table[i][2];
635 *ascq = sense_table[i][3];
636 goto translate_done;
637 }
638 }
639 /* No immediate match */
246619da
TH		 640 if (verbose)
641 printk(KERN_WARNING "ata%u: no sense translation for "
642 "error 0x%02x\n", id, drv_err);
1da177e4 643 }
b095518e
JG		 644
645 /* Fall back to interpreting status bits */
646 for (i = 0; stat_table[i][0] != 0xFF; i++) {
647 if (stat_table[i][0] & drv_stat) {
648 *sk = stat_table[i][1];
649 *asc = stat_table[i][2];
650 *ascq = stat_table[i][3];
651 goto translate_done;
1da177e4 652 }
b095518e
JG		 653 }
654 /* No error? Undecoded? */
246619da
TH		 655 if (verbose)
656 printk(KERN_WARNING "ata%u: no sense translation for "
657 "status: 0x%02x\n", id, drv_stat);
b095518e 658
2d202024
AC		 659 /* We need a sensible error return here, which is tricky, and one
660 that won't cause people to do things like return a disk wrongly */
661 *sk = ABORTED_COMMAND;
662 *asc = 0x00;
663 *ascq = 0x00;
b095518e
JG		 664
665 translate_done:
246619da
TH		 666 if (verbose)
667 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
668 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
669 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 670 return;
671}
672
673/*
674 * ata_gen_ata_desc_sense - Generate check condition sense block.
675 * @qc: Command that completed.
676 *
677 * This function is specific to the ATA descriptor format sense
678 * block specified for the ATA pass through commands. Regardless
679 * of whether the command errored or not, return a sense
680 * block. Copy all controller registers into the sense
681 * block. Clear sense key, ASC & ASCQ if there is no error.
682 *
683 * LOCKING:
cca3974e 684 * spin_lock_irqsave(host lock)
b095518e
JG		 685 */
686void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
687{
688 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 689 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 690 unsigned char *sb = cmd->sense_buffer;
691 unsigned char *desc = sb + 8;
246619da 692 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 693
694 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
695
0e5dec47 696 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 697
b095518e
JG		 698 /*
699 * Use ata_to_sense_error() to map status register bits
700 * onto sense key, asc & ascq.
701 */
058e55e1
TH		 702 if (qc->err_mask ||
703 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 704 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 705 &sb[1], &sb[2], &sb[3], verbose);
b095518e 706 sb[1] &= 0x0f;
1da177e4
LT		 707 }
708
b095518e
JG		 709 /*
710 * Sense data is current and format is descriptor.
711 */
712 sb[0] = 0x72;
1da177e4 713
b095518e
JG		 714 desc[0] = 0x09;
715
716 /*
717 * Set length of additional sense data.
718 * Since we only populate descriptor 0, the total
719 * length is the same (fixed) length as descriptor 0.
720 */
721 desc[1] = sb[7] = 14;
722
723 /*
724 * Copy registers into sense buffer.
725 */
726 desc[2] = 0x00;
727 desc[3] = tf->feature; /* == error reg */
728 desc[5] = tf->nsect;
729 desc[7] = tf->lbal;
730 desc[9] = tf->lbam;
731 desc[11] = tf->lbah;
732 desc[12] = tf->device;
733 desc[13] = tf->command; /* == status reg */
734
735 /*
736 * Fill in Extend bit, and the high order bytes
737 * if applicable.
738 */
739 if (tf->flags & ATA_TFLAG_LBA48) {
740 desc[2] |= 0x01;
741 desc[4] = tf->hob_nsect;
742 desc[6] = tf->hob_lbal;
743 desc[8] = tf->hob_lbam;
744 desc[10] = tf->hob_lbah;
1da177e4 745 }
b095518e 746}
1da177e4 747
b095518e
JG		 748/**
749 * ata_gen_fixed_sense - generate a SCSI fixed sense block
750 * @qc: Command that we are erroring out
751 *
752 * Leverage ata_to_sense_error() to give us the codes. Fit our
753 * LBA in here if there's room.
754 *
755 * LOCKING:
756 * inherited from caller
757 */
758void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
759{
760 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 761 struct ata_taskfile *tf = &qc->result_tf;
b095518e 762 unsigned char *sb = cmd->sense_buffer;
246619da 763 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 764
765 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
766
0e5dec47 767 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 768
b095518e
JG		 769 /*
770 * Use ata_to_sense_error() to map status register bits
771 * onto sense key, asc & ascq.
772 */
058e55e1
TH		 773 if (qc->err_mask ||
774 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 775 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 776 &sb[2], &sb[12], &sb[13], verbose);
b095518e 777 sb[2] &= 0x0f;
1da177e4 778 }
1da177e4
LT		 779
780 sb[0] = 0x70;
b095518e 781 sb[7] = 0x0a;
0274aa25 782
a7dac447
JG		 783 if (tf->flags & ATA_TFLAG_LBA48) {
784 /* TODO: find solution for LBA48 descriptors */
785 }
786
787 else if (tf->flags & ATA_TFLAG_LBA) {
b095518e
JG		 788 /* A small (28b) LBA will fit in the 32b info field */
789 sb[0] |= 0x80; /* set valid bit */
790 sb[3] = tf->device & 0x0f;
791 sb[4] = tf->lbah;
792 sb[5] = tf->lbam;
793 sb[6] = tf->lbal;
1da177e4 794 }
a7dac447
JG		 795
796 else {
797 /* TODO: C/H/S */
798 }
1da177e4
LT		 799}
800
a6cce2a7
BK		 801static void ata_scsi_sdev_config(struct scsi_device *sdev)
802{
803 sdev->use_10_for_rw = 1;
804 sdev->use_10_for_ms = 1;
805}
806
807static void ata_scsi_dev_config(struct scsi_device *sdev,
808 struct ata_device *dev)
809{
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
LT		 1453{
1454 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1455 u8 *cdb = cmd->cmnd;
a22e2eb0 1456 int need_sense = (qc->err_mask != 0);
b095518e 1457
3057ac3c 1458 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1459 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1460 * cache
1461 */
1462 if (!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
1463 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1464 (qc->tf.feature == SETFEATURES_WC_OFF))) {
1465 qc->ap->eh_info.action |= ATA_EH_REVALIDATE;
1466 ata_port_schedule_eh(qc->ap);
1467 }
1468
b095518e
JG		 1469 /* For ATA pass thru (SAT) commands, generate a sense block if
1470 * user mandated it or if there's an error. Note that if we
1471 * generate because the user forced us to, a check condition
1472 * is generated and the ATA register values are returned
1473 * whether the command completed successfully or not. If there
1474 * was no error, SK, ASC and ASCQ will all be zero.
1475 */
a7dac447
JG		 1476 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1477 ((cdb[2] & 0x20) || need_sense)) {
b095518e
JG		 1478 ata_gen_ata_desc_sense(qc);
1479 } else {
1480 if (!need_sense) {
1481 cmd->result = SAM_STAT_GOOD;
1482 } else {
1483 /* TODO: decide which descriptor format to use
1484 * for 48b LBA devices and call that here
1485 * instead of the fixed desc, which is only
1486 * good for smaller LBA (and maybe CHS?)
1487 * devices.
1488 */
1489 ata_gen_fixed_sense(qc);
1490 }
1491 }
1da177e4 1492
246619da 1493 if (need_sense && !qc->ap->ops->error_handler)
e61e0672 1494 ata_dump_status(qc->ap->id, &qc->result_tf);
1da177e4
LT		 1495
1496 qc->scsidone(cmd);
1497
77853bf2 1498 ata_qc_free(qc);
1da177e4
LT		 1499}
1500
3dc1d881
TH		 1501/**
1502 * ata_scmd_need_defer - Check whether we need to defer scmd
1503 * @dev: ATA device to which the command is addressed
1504 * @is_io: Is the command IO (and thus possibly NCQ)?
1505 *
1506 * NCQ and non-NCQ commands cannot run together. As upper layer
1507 * only knows the queue depth, we are responsible for maintaining
1508 * exclusion. This function checks whether a new command can be
1509 * issued to @dev.
1510 *
1511 * LOCKING:
cca3974e 1512 * spin_lock_irqsave(host lock)
3dc1d881
TH		 1513 *
1514 * RETURNS:
1515 * 1 if deferring is needed, 0 otherwise.
1516 */
1517static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1518{
1519 struct ata_port *ap = dev->ap;
1520
1521 if (!(dev->flags & ATA_DFLAG_NCQ))
1522 return 0;
1523
1524 if (is_io) {
1525 if (!ata_tag_valid(ap->active_tag))
1526 return 0;
1527 } else {
1528 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1529 return 0;
1530 }
1531 return 1;
1532}
1533
1da177e4
LT		 1534/**
1535 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1536 * @dev: ATA device to which the command is addressed
1537 * @cmd: SCSI command to execute
1538 * @done: SCSI command completion function
1539 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1540 *
1541 * Our ->queuecommand() function has decided that the SCSI
1542 * command issued can be directly translated into an ATA
1543 * command, rather than handled internally.
1544 *
1545 * This function sets up an ata_queued_cmd structure for the
1546 * SCSI command, and sends that ata_queued_cmd to the hardware.
1547 *
ae006510
DG		 1548 * The xlat_func argument (actor) returns 0 if ready to execute
1549 * ATA command, else 1 to finish translation. If 1 is returned
1550 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1551 * to be set reflecting an error condition or clean (early)
1552 * termination.
1553 *
1da177e4 1554 * LOCKING:
cca3974e 1555 * spin_lock_irqsave(host lock)
2115ea94
TH		 1556 *
1557 * RETURNS:
1558 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1559 * needs to be deferred.
1da177e4 1560 */
2115ea94
TH		 1561static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1562 void (*done)(struct scsi_cmnd *),
1563 ata_xlat_func_t xlat_func)
1da177e4
LT		 1564{
1565 struct ata_queued_cmd *qc;
1566 u8 *scsicmd = cmd->cmnd;
3dc1d881 1567 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1568
1569 VPRINTK("ENTER\n");
1570
3dc1d881
TH		 1571 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1572 goto defer;
1573
3373efd8 1574 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1575 if (!qc)
ae006510 1576 goto err_mem;
1da177e4
LT		 1577
1578 /* data is present; dma-map it */
be7db055
CH		 1579 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1580 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1581 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1582 ata_dev_printk(dev, KERN_WARNING,
1583 "WARNING: zero len r/w req\n");
ae006510 1584 goto err_did;
1da177e4
LT		 1585 }
1586
1587 if (cmd->use_sg)
1588 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1589 else
1590 ata_sg_init_one(qc, cmd->request_buffer,
1591 cmd->request_bufflen);
1592
1593 qc->dma_dir = cmd->sc_data_direction;
1594 }
1595
1596 qc->complete_fn = ata_scsi_qc_complete;
1597
1598 if (xlat_func(qc, scsicmd))
ae006510 1599 goto early_finish;
1da177e4
LT		 1600
1601 /* select device, send command to hardware */
8e0e694a 1602 ata_qc_issue(qc);
1da177e4
LT		 1603
1604 VPRINTK("EXIT\n");
2115ea94 1605 return 0;
1da177e4 1606
ae006510
DG		 1607early_finish:
1608 ata_qc_free(qc);
1609 done(cmd);
1610 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1611 return 0;
ae006510
DG		 1612
1613err_did:
1da177e4 1614 ata_qc_free(qc);
ae006510
DG		 1615err_mem:
1616 cmd->result = (DID_ERROR << 16);
1617 done(cmd);
1618 DPRINTK("EXIT - internal\n");
2115ea94 1619 return 0;
3dc1d881
TH		 1620
1621defer:
1622 DPRINTK("EXIT - defer\n");
1623 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1624}
1625
1626/**
1627 * ata_scsi_rbuf_get - Map response buffer.
1628 * @cmd: SCSI command containing buffer to be mapped.
1629 * @buf_out: Pointer to mapped area.
1630 *
1631 * Maps buffer contained within SCSI command @cmd.
1632 *
1633 * LOCKING:
cca3974e 1634 * spin_lock_irqsave(host lock)
1da177e4
LT		 1635 *
1636 * RETURNS:
1637 * Length of response buffer.
1638 */
1639
1640static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1641{
1642 u8 *buf;
1643 unsigned int buflen;
1644
1645 if (cmd->use_sg) {
1646 struct scatterlist *sg;
1647
1648 sg = (struct scatterlist *) cmd->request_buffer;
1649 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1650 buflen = sg->length;
1651 } else {
1652 buf = cmd->request_buffer;
1653 buflen = cmd->request_bufflen;
1654 }
1655
1656 *buf_out = buf;
1657 return buflen;
1658}
1659
1660/**
1661 * ata_scsi_rbuf_put - Unmap response buffer.
1662 * @cmd: SCSI command containing buffer to be unmapped.
1663 * @buf: buffer to unmap
1664 *
1665 * Unmaps response buffer contained within @cmd.
1666 *
1667 * LOCKING:
cca3974e 1668 * spin_lock_irqsave(host lock)
1da177e4
LT		 1669 */
1670
1671static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1672{
1673 if (cmd->use_sg) {
1674 struct scatterlist *sg;
1675
1676 sg = (struct scatterlist *) cmd->request_buffer;
1677 kunmap_atomic(buf - sg->offset, KM_USER0);
1678 }
1679}
1680
1681/**
1682 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1683 * @args: device IDENTIFY data / SCSI command of interest.
1684 * @actor: Callback hook for desired SCSI command simulator
1685 *
1686 * Takes care of the hard work of simulating a SCSI command...
1687 * Mapping the response buffer, calling the command's handler,
1688 * and handling the handler's return value. This return value
1689 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1690 * completed successfully (0), or not (in which case cmd->result
1691 * and sense buffer are assumed to be set).
1da177e4
LT		 1692 *
1693 * LOCKING:
cca3974e 1694 * spin_lock_irqsave(host lock)
1da177e4
LT		 1695 */
1696
1697void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1698 unsigned int (*actor) (struct ata_scsi_args *args,
1699 u8 *rbuf, unsigned int buflen))
1700{
1701 u8 *rbuf;
1702 unsigned int buflen, rc;
1703 struct scsi_cmnd *cmd = args->cmd;
1704
1705 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1706 memset(rbuf, 0, buflen);
1707 rc = actor(args, rbuf, buflen);
1708 ata_scsi_rbuf_put(cmd, rbuf);
1709
ae006510 1710 if (rc == 0)
1da177e4 1711 cmd->result = SAM_STAT_GOOD;
ae006510 1712 args->done(cmd);
1da177e4
LT		 1713}
1714
1715/**
1716 * ata_scsiop_inq_std - Simulate INQUIRY command
1717 * @args: device IDENTIFY data / SCSI command of interest.
1718 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1719 * @buflen: Response buffer length.
1720 *
1721 * Returns standard device identification data associated
b142eb65 1722 * with non-VPD INQUIRY command output.
1da177e4
LT		 1723 *
1724 * LOCKING:
cca3974e 1725 * spin_lock_irqsave(host lock)
1da177e4
LT		 1726 */
1727
1728unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1729 unsigned int buflen)
1730{
1731 u8 hdr[] = {
1732 TYPE_DISK,
1733 0,
1734 0x5, /* claim SPC-3 version compatibility */
1735 2,
1736 95 - 4
1737 };
1738
1739 /* set scsi removeable (RMB) bit per ata bit */
1740 if (ata_id_removeable(args->id))
1741 hdr[1] |= (1 << 7);
1742
1743 VPRINTK("ENTER\n");
1744
1745 memcpy(rbuf, hdr, sizeof(hdr));
1746
1747 if (buflen > 35) {
1748 memcpy(&rbuf[8], "ATA ", 8);
6a62a04d
TH		 1749 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1750 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1da177e4
LT		 1751 if (rbuf[32] == 0 || rbuf[32] == ' ')
1752 memcpy(&rbuf[32], "n/a ", 4);
1753 }
1754
1755 if (buflen > 63) {
1756 const u8 versions[] = {
1757 0x60, /* SAM-3 (no version claimed) */
1758
1759 0x03,
1760 0x20, /* SBC-2 (no version claimed) */
1761
1762 0x02,
1763 0x60 /* SPC-3 (no version claimed) */
1764 };
1765
1766 memcpy(rbuf + 59, versions, sizeof(versions));
1767 }
1768
1769 return 0;
1770}
1771
1772/**
b142eb65 1773 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1774 * @args: device IDENTIFY data / SCSI command of interest.
1775 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1776 * @buflen: Response buffer length.
1777 *
b142eb65 1778 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1779 *
1780 * LOCKING:
cca3974e 1781 * spin_lock_irqsave(host lock)
1da177e4
LT		 1782 */
1783
1784unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1785 unsigned int buflen)
1786{
1787 const u8 pages[] = {
1788 0x00, /* page 0x00, this page */
1789 0x80, /* page 0x80, unit serial no page */
1790 0x83 /* page 0x83, device ident page */
1791 };
b142eb65 1792 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1793
1794 if (buflen > 6)
1795 memcpy(rbuf + 4, pages, sizeof(pages));
1796
1797 return 0;
1798}
1799
1800/**
b142eb65 1801 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1802 * @args: device IDENTIFY data / SCSI command of interest.
1803 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1804 * @buflen: Response buffer length.
1805 *
1806 * Returns ATA device serial number.
1807 *
1808 * LOCKING:
cca3974e 1809 * spin_lock_irqsave(host lock)
1da177e4
LT		 1810 */
1811
1812unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1813 unsigned int buflen)
1814{
1815 const u8 hdr[] = {
1816 0,
1817 0x80, /* this page code */
1818 0,
1819 ATA_SERNO_LEN, /* page len */
1820 };
1821 memcpy(rbuf, hdr, sizeof(hdr));
1822
1823 if (buflen > (ATA_SERNO_LEN + 4 - 1))
6a62a04d
TH		 1824 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1825 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1da177e4
LT		 1826
1827 return 0;
1828}
1829
1da177e4 1830/**
b142eb65 1831 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1832 * @args: device IDENTIFY data / SCSI command of interest.
1833 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1834 * @buflen: Response buffer length.
1835 *
b142eb65
JG		 1836 * Yields two logical unit device identification designators:
1837 * - vendor specific ASCII containing the ATA serial number
1838 * - SAT defined "t10 vendor id based" containing ASCII vendor
1839 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1840 *
1841 * LOCKING:
cca3974e 1842 * spin_lock_irqsave(host lock)
1da177e4
LT		 1843 */
1844
1845unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1846 unsigned int buflen)
1847{
b142eb65
JG		 1848 int num;
1849 const int sat_model_serial_desc_len = 68;
1850 const int ata_model_byte_len = 40;
1da177e4 1851
b142eb65
JG		 1852 rbuf[1] = 0x83; /* this page code */
1853 num = 4;
1854
1855 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1856 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1857 rbuf[num + 0] = 2;
b142eb65
JG		 1858 rbuf[num + 3] = ATA_SERNO_LEN;
1859 num += 4;
1860 ata_id_string(args->id, (unsigned char *) rbuf + num,
1861 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1862 num += ATA_SERNO_LEN;
1da177e4 1863 }
b142eb65
JG		 1864 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1865 /* SAT defined lu model and serial numbers descriptor */
1866 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1867 rbuf[num + 0] = 2;
1868 rbuf[num + 1] = 1;
b142eb65
JG		 1869 rbuf[num + 3] = sat_model_serial_desc_len;
1870 num += 4;
1871 memcpy(rbuf + num, "ATA ", 8);
1872 num += 8;
1873 ata_id_string(args->id, (unsigned char *) rbuf + num,
1874 ATA_ID_PROD_OFS, ata_model_byte_len);
1875 num += ata_model_byte_len;
1876 ata_id_string(args->id, (unsigned char *) rbuf + num,
1877 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1878 num += ATA_SERNO_LEN;
1879 }
1880 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1881 return 0;
1882}
1883
1884/**
0cba632b 1885 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1886 * @args: device IDENTIFY data / SCSI command of interest.
1887 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1888 * @buflen: Response buffer length.
1889 *
1890 * No operation. Simply returns success to caller, to indicate
1891 * that the caller should successfully complete this SCSI command.
1892 *
1893 * LOCKING:
cca3974e 1894 * spin_lock_irqsave(host lock)
1da177e4
LT		 1895 */
1896
1897unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1898 unsigned int buflen)
1899{
1900 VPRINTK("ENTER\n");
1901 return 0;
1902}
1903
1904/**
1905 * ata_msense_push - Push data onto MODE SENSE data output buffer
1906 * @ptr_io: (input/output) Location to store more output data
1907 * @last: End of output data buffer
1908 * @buf: Pointer to BLOB being added to output buffer
1909 * @buflen: Length of BLOB
1910 *
1911 * Store MODE SENSE data on an output buffer.
1912 *
1913 * LOCKING:
1914 * None.
1915 */
1916
1917static void ata_msense_push(u8 **ptr_io, const u8 *last,
1918 const u8 *buf, unsigned int buflen)
1919{
1920 u8 *ptr = *ptr_io;
1921
1922 if ((ptr + buflen - 1) > last)
1923 return;
1924
1925 memcpy(ptr, buf, buflen);
1926
1927 ptr += buflen;
1928
1929 *ptr_io = ptr;
1930}
1931
1932/**
1933 * ata_msense_caching - Simulate MODE SENSE caching info page
1934 * @id: device IDENTIFY data
1935 * @ptr_io: (input/output) Location to store more output data
1936 * @last: End of output data buffer
1937 *
1938 * Generate a caching info page, which conditionally indicates
1939 * write caching to the SCSI layer, depending on device
1940 * capabilities.
1941 *
1942 * LOCKING:
1943 * None.
1944 */
1945
1946static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1947 const u8 *last)
1948{
00ac37f5 1949 u8 page[CACHE_MPAGE_LEN];
1da177e4 1950
00ac37f5 1951 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1952 if (ata_id_wcache_enabled(id))
1953 page[2] |= (1 << 2); /* write cache enable */
1954 if (!ata_id_rahead_enabled(id))
1955 page[12] |= (1 << 5); /* disable read ahead */
1956
1957 ata_msense_push(ptr_io, last, page, sizeof(page));
1958 return sizeof(page);
1959}
1960
1961/**
1962 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1963 * @dev: Device associated with this MODE SENSE command
1964 * @ptr_io: (input/output) Location to store more output data
1965 * @last: End of output data buffer
1966 *
1967 * Generate a generic MODE SENSE control mode page.
1968 *
1969 * LOCKING:
1970 * None.
1971 */
1972
1973static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1974{
00ac37f5
DG		 1975 ata_msense_push(ptr_io, last, def_control_mpage,
1976 sizeof(def_control_mpage));
1977 return sizeof(def_control_mpage);
1da177e4
LT		 1978}
1979
1980/**
1981 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1982 * @dev: Device associated with this MODE SENSE command
1983 * @ptr_io: (input/output) Location to store more output data
1984 * @last: End of output data buffer
1985 *
1986 * Generate a generic MODE SENSE r/w error recovery page.
1987 *
1988 * LOCKING:
1989 * None.
1990 */
1991
1992static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1993{
1da177e4 1994
00ac37f5
DG		 1995 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1996 sizeof(def_rw_recovery_mpage));
1997 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1998}
1999
48bdc8ec
JA		 2000/*
2001 * We can turn this into a real blacklist if it's needed, for now just
2002 * blacklist any Maxtor BANC1G10 revision firmware
2003 */
2004static int ata_dev_supports_fua(u16 *id)
2005{
2006 unsigned char model[41], fw[9];
2007
c3c013a2
JG		 2008 if (!libata_fua)
2009 return 0;
48bdc8ec
JA		 2010 if (!ata_id_has_fua(id))
2011 return 0;
2012
6a62a04d
TH		 2013 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
2014 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
48bdc8ec 2015
2e02671d 2016 if (strcmp(model, "Maxtor"))
48bdc8ec 2017 return 1;
2e02671d 2018 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 2019 return 1;
2020
2021 return 0; /* blacklisted */
2022}
2023
1da177e4
LT		 2024/**
2025 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2026 * @args: device IDENTIFY data / SCSI command of interest.
2027 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2028 * @buflen: Response buffer length.
2029 *
00ac37f5
DG		 2030 * Simulate MODE SENSE commands. Assume this is invoked for direct
2031 * access devices (e.g. disks) only. There should be no block
2032 * descriptor for other device types.
1da177e4
LT		 2033 *
2034 * LOCKING:
cca3974e 2035 * spin_lock_irqsave(host lock)
1da177e4
LT		 2036 */
2037
2038unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2039 unsigned int buflen)
2040{
9a3dccc4 2041 struct ata_device *dev = args->dev;
1da177e4 2042 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 2043 const u8 sat_blk_desc[] = {
2044 0, 0, 0, 0, /* number of blocks: sat unspecified */
2045 0,
2046 0, 0x2, 0x0 /* block length: 512 bytes */
2047 };
2048 u8 pg, spg;
2049 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 2050 u8 dpofua;
1da177e4
LT		 2051
2052 VPRINTK("ENTER\n");
2053
2054 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 2055 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2056 /*
2057 * LLBA bit in msense(10) ignored (compliant)
1da177e4 2058 */
00ac37f5 2059
1da177e4 2060 page_control = scsicmd[2] >> 6;
ae006510
DG		 2061 switch (page_control) {
2062 case 0: /* current */
2063 break; /* supported */
2064 case 3: /* saved */
2065 goto saving_not_supp;
2066 case 1: /* changeable */
2067 case 2: /* defaults */
2068 default:
2069 goto invalid_fld;
2070 }
1da177e4 2071
00ac37f5
DG		 2072 if (six_byte) {
2073 output_len = 4 + (ebd ? 8 : 0);
2074 alloc_len = scsicmd[4];
2075 } else {
2076 output_len = 8 + (ebd ? 8 : 0);
2077 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2078 }
2079 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 2080
2081 p = rbuf + output_len;
00ac37f5 2082 last = rbuf + minlen - 1;
1da177e4 2083
00ac37f5
DG		 2084 pg = scsicmd[2] & 0x3f;
2085 spg = scsicmd[3];
2086 /*
2087 * No mode subpages supported (yet) but asking for _all_
2088 * subpages may be valid
2089 */
2090 if (spg && (spg != ALL_SUB_MPAGES))
2091 goto invalid_fld;
2092
2093 switch(pg) {
2094 case RW_RECOVERY_MPAGE:
1da177e4
LT		 2095 output_len += ata_msense_rw_recovery(&p, last);
2096 break;
2097
00ac37f5 2098 case CACHE_MPAGE:
1da177e4
LT		 2099 output_len += ata_msense_caching(args->id, &p, last);
2100 break;
2101
00ac37f5 2102 case CONTROL_MPAGE: {
1da177e4
LT		 2103 output_len += ata_msense_ctl_mode(&p, last);
2104 break;
2105 }
2106
00ac37f5 2107 case ALL_MPAGES:
1da177e4
LT		 2108 output_len += ata_msense_rw_recovery(&p, last);
2109 output_len += ata_msense_caching(args->id, &p, last);
2110 output_len += ata_msense_ctl_mode(&p, last);
2111 break;
2112
2113 default: /* invalid page code */
ae006510 2114 goto invalid_fld;
1da177e4
LT		 2115 }
2116
00ac37f5
DG		 2117 if (minlen < 1)
2118 return 0;
9a3dccc4
TH		 2119
2120 dpofua = 0;
f79d409f 2121 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 2122 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2123 dpofua = 1 << 4;
2124
1da177e4
LT		 2125 if (six_byte) {
2126 output_len--;
2127 rbuf[0] = output_len;
9a3dccc4
TH		 2128 if (minlen > 2)
2129 rbuf[2] |= dpofua;
00ac37f5
DG		 2130 if (ebd) {
2131 if (minlen > 3)
2132 rbuf[3] = sizeof(sat_blk_desc);
2133 if (minlen > 11)
2134 memcpy(rbuf + 4, sat_blk_desc,
2135 sizeof(sat_blk_desc));
2136 }
1da177e4
LT		 2137 } else {
2138 output_len -= 2;
2139 rbuf[0] = output_len >> 8;
00ac37f5
DG		 2140 if (minlen > 1)
2141 rbuf[1] = output_len;
9a3dccc4
TH		 2142 if (minlen > 3)
2143 rbuf[3] |= dpofua;
00ac37f5
DG		 2144 if (ebd) {
2145 if (minlen > 7)
2146 rbuf[7] = sizeof(sat_blk_desc);
2147 if (minlen > 15)
2148 memcpy(rbuf + 8, sat_blk_desc,
2149 sizeof(sat_blk_desc));
2150 }
1da177e4 2151 }
1da177e4 2152 return 0;
ae006510
DG		 2153
2154invalid_fld:
2155 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2156 /* "Invalid field in cbd" */
2157 return 1;
2158
2159saving_not_supp:
2160 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2161 /* "Saving parameters not supported" */
2162 return 1;
1da177e4
LT		 2163}
2164
2165/**
2166 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2167 * @args: device IDENTIFY data / SCSI command of interest.
2168 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2169 * @buflen: Response buffer length.
2170 *
2171 * Simulate READ CAPACITY commands.
2172 *
2173 * LOCKING:
cca3974e 2174 * spin_lock_irqsave(host lock)
1da177e4
LT		 2175 */
2176
2177unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2178 unsigned int buflen)
2179{
2180 u64 n_sectors;
2181 u32 tmp;
2182
2183 VPRINTK("ENTER\n");
2184
8bf62ece
AL		 2185 if (ata_id_has_lba(args->id)) {
2186 if (ata_id_has_lba48(args->id))
2187 n_sectors = ata_id_u64(args->id, 100);
2188 else
2189 n_sectors = ata_id_u32(args->id, 60);
2190 } else {
2191 /* CHS default translation */
2192 n_sectors = args->id[1] * args->id[3] * args->id[6];
2193
2194 if (ata_id_current_chs_valid(args->id))
2195 /* CHS current translation */
2196 n_sectors = ata_id_u32(args->id, 57);
2197 }
2198
1da177e4
LT		 2199 n_sectors--; /* ATA TotalUserSectors - 1 */
2200
1da177e4 2201 if (args->cmd->cmnd[0] == READ_CAPACITY) {
0c144d0d
PP		 2202 if( n_sectors >= 0xffffffffULL )
2203 tmp = 0xffffffff ; /* Return max count on overflow */
2204 else
2205 tmp = n_sectors ;
2206
1da177e4
LT		 2207 /* sector count, 32-bit */
2208 rbuf[0] = tmp >> (8 * 3);
2209 rbuf[1] = tmp >> (8 * 2);
2210 rbuf[2] = tmp >> (8 * 1);
2211 rbuf[3] = tmp;
2212
2213 /* sector size */
2214 tmp = ATA_SECT_SIZE;
2215 rbuf[6] = tmp >> 8;
2216 rbuf[7] = tmp;
2217
2218 } else {
2219 /* sector count, 64-bit */
0c144d0d
PP		 2220 tmp = n_sectors >> (8 * 4);
2221 rbuf[2] = tmp >> (8 * 3);
2222 rbuf[3] = tmp >> (8 * 2);
2223 rbuf[4] = tmp >> (8 * 1);
2224 rbuf[5] = tmp;
2225 tmp = n_sectors;
1da177e4
LT		 2226 rbuf[6] = tmp >> (8 * 3);
2227 rbuf[7] = tmp >> (8 * 2);
2228 rbuf[8] = tmp >> (8 * 1);
2229 rbuf[9] = tmp;
2230
2231 /* sector size */
2232 tmp = ATA_SECT_SIZE;
2233 rbuf[12] = tmp >> 8;
2234 rbuf[13] = tmp;
2235 }
2236
2237 return 0;
2238}
2239
2240/**
2241 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2242 * @args: device IDENTIFY data / SCSI command of interest.
2243 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2244 * @buflen: Response buffer length.
2245 *
2246 * Simulate REPORT LUNS command.
2247 *
2248 * LOCKING:
cca3974e 2249 * spin_lock_irqsave(host lock)
1da177e4
LT		 2250 */
2251
2252unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2253 unsigned int buflen)
2254{
2255 VPRINTK("ENTER\n");
2256 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2257
2258 return 0;
2259}
2260
845c5834
DG		 2261/**
2262 * ata_scsi_set_sense - Set SCSI sense data and status
2263 * @cmd: SCSI request to be handled
2264 * @sk: SCSI-defined sense key
2265 * @asc: SCSI-defined additional sense code
2266 * @ascq: SCSI-defined additional sense code qualifier
2267 *
2268 * Helper function that builds a valid fixed format, current
2269 * response code and the given sense key (sk), additional sense
2270 * code (asc) and additional sense code qualifier (ascq) with
2271 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2272 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2273 *
2274 * LOCKING:
2275 * Not required
2276 */
2277
2278void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2279{
2280 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2281
2282 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2283 cmd->sense_buffer[2] = sk;
2284 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2285 cmd->sense_buffer[12] = asc;
2286 cmd->sense_buffer[13] = ascq;
2287}
2288
1da177e4
LT		 2289/**
2290 * ata_scsi_badcmd - End a SCSI request with an error
2291 * @cmd: SCSI request to be handled
2292 * @done: SCSI command completion function
2293 * @asc: SCSI-defined additional sense code
2294 * @ascq: SCSI-defined additional sense code qualifier
2295 *
2296 * Helper function that completes a SCSI command with
2297 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2298 * and the specified additional sense codes.
2299 *
2300 * LOCKING:
cca3974e 2301 * spin_lock_irqsave(host lock)
1da177e4
LT		 2302 */
2303
2304void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2305{
2306 DPRINTK("ENTER\n");
ae006510 2307 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2308
2309 done(cmd);
2310}
2311
77853bf2 2312static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2313{
74e6c8c3 2314 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2315 /* FIXME: not quite right; we don't want the
2316 * translation of taskfile registers into
2317 * a sense descriptors, since that's only
2318 * correct for ATA, not ATAPI
2319 */
2320 ata_gen_ata_desc_sense(qc);
74e6c8c3 2321 }
a939c963 2322
c6e6e666 2323 qc->scsidone(qc->scsicmd);
77853bf2 2324 ata_qc_free(qc);
c6e6e666 2325}
a939c963 2326
c6e6e666
JG		 2327/* is it pointless to prefer PIO for "safety reasons"? */
2328static inline int ata_pio_use_silly(struct ata_port *ap)
2329{
2330 return (ap->flags & ATA_FLAG_PIO_DMA);
2331}
2332
2333static void atapi_request_sense(struct ata_queued_cmd *qc)
2334{
2335 struct ata_port *ap = qc->ap;
2336 struct scsi_cmnd *cmd = qc->scsicmd;
2337
2338 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2339
2340 /* FIXME: is this needed? */
2341 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2342
c6e6e666
JG		 2343 ap->ops->tf_read(ap, &qc->tf);
2344
2345 /* fill these in, for the case where they are -not- overwritten */
2346 cmd->sense_buffer[0] = 0x70;
2347 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2348
2349 ata_qc_reinit(qc);
2350
a939c963
JG		 2351 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2352 qc->dma_dir = DMA_FROM_DEVICE;
2353
6e7846e9 2354 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2355 qc->cdb[0] = REQUEST_SENSE;
2356 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2357
2358 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2359 qc->tf.command = ATA_CMD_PACKET;
2360
c6e6e666
JG		 2361 if (ata_pio_use_silly(ap)) {
2362 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2363 qc->tf.feature |= ATAPI_PKT_DMA;
2364 } else {
2365 qc->tf.protocol = ATA_PROT_ATAPI;
2366 qc->tf.lbam = (8 * 1024) & 0xff;
2367 qc->tf.lbah = (8 * 1024) >> 8;
2368 }
a939c963
JG		 2369 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2370
c6e6e666 2371 qc->complete_fn = atapi_sense_complete;
a939c963 2372
8e0e694a 2373 ata_qc_issue(qc);
a939c963
JG		 2374
2375 DPRINTK("EXIT\n");
2376}
2377
77853bf2 2378static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2379{
2380 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2381 unsigned int err_mask = qc->err_mask;
1da177e4 2382
a7dac447 2383 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2384
246619da
TH		 2385 /* handle completion from new EH */
2386 if (unlikely(qc->ap->ops->error_handler &&
2387 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2388
2389 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2390 /* FIXME: not quite right; we don't want the
2391 * translation of taskfile registers into a
2392 * sense descriptors, since that's only
2393 * correct for ATA, not ATAPI
2394 */
2395 ata_gen_ata_desc_sense(qc);
2396 }
2397
22aac089
TH		 2398 /* SCSI EH automatically locks door if sdev->locked is
2399 * set. Sometimes door lock request continues to
2400 * fail, for example, when no media is present. This
2401 * creates a loop - SCSI EH issues door lock which
2402 * fails and gets invoked again to acquire sense data
2403 * for the failed command.
2404 *
2405 * If door lock fails, always clear sdev->locked to
2406 * avoid this infinite loop.
2407 */
2408 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2409 qc->dev->sdev->locked = 0;
2410
246619da
TH		 2411 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2412 qc->scsidone(cmd);
2413 ata_qc_free(qc);
2414 return;
2415 }
2416
2417 /* successful completion or old EH failure path */
a7dac447 2418 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2419 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2420 atapi_request_sense(qc);
77853bf2 2421 return;
74e6c8c3 2422 } else if (unlikely(err_mask)) {
a7dac447
JG		 2423 /* FIXME: not quite right; we don't want the
2424 * translation of taskfile registers into
2425 * a sense descriptors, since that's only
2426 * correct for ATA, not ATAPI
2427 */
2428 ata_gen_ata_desc_sense(qc);
74e6c8c3 2429 } else {
1da177e4
LT		 2430 u8 *scsicmd = cmd->cmnd;
2431
fd71da46 2432 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2433 u8 *buf = NULL;
2434 unsigned int buflen;
2435
2436 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2437
2438 /* ATAPI devices typically report zero for their SCSI version,
2439 * and sometimes deviate from the spec WRT response data
2440 * format. If SCSI version is reported as zero like normal,
2441 * then we make the following fixups: 1) Fake MMC-5 version,
2442 * to indicate to the Linux scsi midlayer this is a modern
2443 * device. 2) Ensure response data format / ATAPI information
2444 * are always correct.
a15dbeb4
JG		 2445 */
2446 if (buf[2] == 0) {
2447 buf[2] = 0x5;
2448 buf[3] = 0x32;
2449 }
2450
1da177e4
LT		 2451 ata_scsi_rbuf_put(cmd, buf);
2452 }
a15dbeb4 2453
1da177e4
LT		 2454 cmd->result = SAM_STAT_GOOD;
2455 }
2456
2457 qc->scsidone(cmd);
77853bf2 2458 ata_qc_free(qc);
1da177e4
LT		 2459}
2460/**
2461 * atapi_xlat - Initialize PACKET taskfile
2462 * @qc: command structure to be initialized
2463 * @scsicmd: SCSI CDB associated with this PACKET command
2464 *
2465 * LOCKING:
cca3974e 2466 * spin_lock_irqsave(host lock)
1da177e4
LT		 2467 *
2468 * RETURNS:
2469 * Zero on success, non-zero on failure.
2470 */
2471
057ace5e 2472static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 2473{
2474 struct scsi_cmnd *cmd = qc->scsicmd;
2475 struct ata_device *dev = qc->dev;
2476 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db055 2477 int nodata = (cmd->sc_data_direction == DMA_NONE);
1da177e4
LT		 2478
2479 if (!using_pio)
2480 /* Check whether ATAPI DMA is safe */
2481 if (ata_check_atapi_dma(qc))
2482 using_pio = 1;
2483
6e7846e9 2484 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
1da177e4
LT		 2485
2486 qc->complete_fn = atapi_qc_complete;
2487
2488 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db055 2489 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2490 qc->tf.flags |= ATA_TFLAG_WRITE;
2491 DPRINTK("direction: write\n");
2492 }
2493
2494 qc->tf.command = ATA_CMD_PACKET;
2495
2496 /* no data, or PIO data xfer */
2497 if (using_pio || nodata) {
2498 if (nodata)
2499 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2500 else
2501 qc->tf.protocol = ATA_PROT_ATAPI;
2502 qc->tf.lbam = (8 * 1024) & 0xff;
2503 qc->tf.lbah = (8 * 1024) >> 8;
2504 }
2505
2506 /* DMA data xfer */
2507 else {
2508 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2509 qc->tf.feature |= ATAPI_PKT_DMA;
2510
95de719a
AL		 2511 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2512 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2513 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2514 }
2515
5d5ff44f 2516 qc->nbytes = cmd->request_bufflen;
1da177e4
LT		 2517
2518 return 0;
2519}
2520
ab5b3a5b
TH		 2521static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2522{
2523 if (likely(id < ATA_MAX_DEVICES))
2524 return &ap->device[id];
2525 return NULL;
2526}
2527
2528static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2529 const struct scsi_device *scsidev)
2530{
2531 /* skip commands not addressed to targets we simulate */
2532 if (unlikely(scsidev->channel || scsidev->lun))
2533 return NULL;
2534
2535 return ata_find_dev(ap, scsidev->id);
2536}
2537
99ba9e09
BK		 2538/**
2539 * ata_scsi_dev_enabled - determine if device is enabled
2540 * @dev: ATA device
2541 *
2542 * Determine if commands should be sent to the specified device.
2543 *
2544 * LOCKING:
cca3974e 2545 * spin_lock_irqsave(host lock)
99ba9e09
BK		 2546 *
2547 * RETURNS:
2548 * 0 if commands are not allowed / 1 if commands are allowed
2549 */
2550
2551static int ata_scsi_dev_enabled(struct ata_device *dev)
2552{
2553 if (unlikely(!ata_dev_enabled(dev)))
2554 return 0;
2555
2556 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2557 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2558 ata_dev_printk(dev, KERN_WARNING,
2559 "WARNING: ATAPI is %s, device ignored.\n",
2560 atapi_enabled ? "not supported with this driver" : "disabled");
2561 return 0;
2562 }
2563 }
2564
2565 return 1;
2566}
2567
1da177e4
LT		 2568/**
2569 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2570 * @ap: ATA port to which the device is attached
2571 * @scsidev: SCSI device from which we derive the ATA device
2572 *
2573 * Given various information provided in struct scsi_cmnd,
2574 * map that onto an ATA bus, and using that mapping
2575 * determine which ata_device is associated with the
2576 * SCSI command to be sent.
2577 *
2578 * LOCKING:
cca3974e 2579 * spin_lock_irqsave(host lock)
1da177e4
LT		 2580 *
2581 * RETURNS:
2582 * Associated ATA device, or %NULL if not found.
2583 */
1da177e4 2584static struct ata_device *
057ace5e 2585ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2586{
ab5b3a5b 2587 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2588
99ba9e09 2589 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
1da177e4
LT		 2590 return NULL;
2591
1da177e4
LT		 2592 return dev;
2593}
2594
b095518e
JG		 2595/*
2596 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2597 * @byte1: Byte 1 from pass-thru CDB.
2598 *
2599 * RETURNS:
2600 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2601 */
2602static u8
2603ata_scsi_map_proto(u8 byte1)
2604{
2605 switch((byte1 & 0x1e) >> 1) {
2606 case 3: /* Non-data */
2607 return ATA_PROT_NODATA;
2608
2609 case 6: /* DMA */
2610 return ATA_PROT_DMA;
2611
2612 case 4: /* PIO Data-in */
2613 case 5: /* PIO Data-out */
b095518e
JG		 2614 return ATA_PROT_PIO;
2615
2616 case 10: /* Device Reset */
2617 case 0: /* Hard Reset */
2618 case 1: /* SRST */
2619 case 2: /* Bus Idle */
2620 case 7: /* Packet */
2621 case 8: /* DMA Queued */
2622 case 9: /* Device Diagnostic */
2623 case 11: /* UDMA Data-in */
2624 case 12: /* UDMA Data-Out */
2625 case 13: /* FPDMA */
2626 default: /* Reserved */
2627 break;
2628 }
2629
2630 return ATA_PROT_UNKNOWN;
2631}
2632
2633/**
2634 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2635 * @qc: command structure to be initialized
8e8b77dd 2636 * @scsicmd: SCSI command to convert
b095518e
JG		 2637 *
2638 * Handles either 12 or 16-byte versions of the CDB.
2639 *
2640 * RETURNS:
2641 * Zero on success, non-zero on failure.
2642 */
2643static unsigned int
00ac37f5 2644ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
b095518e
JG		 2645{
2646 struct ata_taskfile *tf = &(qc->tf);
2647 struct scsi_cmnd *cmd = qc->scsicmd;
f79d409f 2648 struct ata_device *dev = qc->dev;
b095518e
JG		 2649
2650 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
9a405257 2651 goto invalid_fld;
8190bdb9 2652
f79d409f
AC		 2653 /* We may not issue DMA commands if no DMA mode is set */
2654 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2655 goto invalid_fld;
b095518e 2656
f59b0cf8
AL		 2657 if (scsicmd[1] & 0xe0)
2658 /* PIO multi not supported yet */
2659 goto invalid_fld;
2660
b095518e
JG		 2661 /*
2662 * 12 and 16 byte CDBs use different offsets to
2663 * provide the various register values.
2664 */
2665 if (scsicmd[0] == ATA_16) {
2666 /*
2667 * 16-byte CDB - may contain extended commands.
2668 *
2669 * If that is the case, copy the upper byte register values.
2670 */
2671 if (scsicmd[1] & 0x01) {
2672 tf->hob_feature = scsicmd[3];
2673 tf->hob_nsect = scsicmd[5];
2674 tf->hob_lbal = scsicmd[7];
2675 tf->hob_lbam = scsicmd[9];
2676 tf->hob_lbah = scsicmd[11];
2677 tf->flags |= ATA_TFLAG_LBA48;
2678 } else
2679 tf->flags &= ~ATA_TFLAG_LBA48;
2680
2681 /*
2682 * Always copy low byte, device and command registers.
2683 */
2684 tf->feature = scsicmd[4];
2685 tf->nsect = scsicmd[6];
2686 tf->lbal = scsicmd[8];
2687 tf->lbam = scsicmd[10];
2688 tf->lbah = scsicmd[12];
2689 tf->device = scsicmd[13];
2690 tf->command = scsicmd[14];
2691 } else {
2692 /*
2693 * 12-byte CDB - incapable of extended commands.
2694 */
2695 tf->flags &= ~ATA_TFLAG_LBA48;
2696
2697 tf->feature = scsicmd[3];
2698 tf->nsect = scsicmd[4];
2699 tf->lbal = scsicmd[5];
2700 tf->lbam = scsicmd[6];
2701 tf->lbah = scsicmd[7];
2702 tf->device = scsicmd[8];
2703 tf->command = scsicmd[9];
2704 }
dcc2d1e7
ML		 2705 /*
2706 * If slave is possible, enforce correct master/slave bit
2707 */
2708 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2709 tf->device = qc->dev->devno ?
2710 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e
JG		 2711
2712 /*
2713 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2714 * SET_FEATURES - XFER MODE must be preceded/succeeded
2715 * by an update to hardware-specific registers for each
2716 * controller (i.e. the reason for ->set_piomode(),
2717 * ->set_dmamode(), and ->post_set_mode() hooks).
2718 */
2719 if ((tf->command == ATA_CMD_SET_FEATURES)
2720 && (tf->feature == SETFEATURES_XFER))
9a405257 2721 goto invalid_fld;
b095518e
JG		 2722
2723 /*
2724 * Set flags so that all registers will be written,
2725 * and pass on write indication (used for PIO/DMA
2726 * setup.)
2727 */
2728 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2729
0274aa25 2730 if (cmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2731 tf->flags |= ATA_TFLAG_WRITE;
2732
2733 /*
2734 * Set transfer length.
2735 *
2736 * TODO: find out if we need to do more here to
2737 * cover scatter/gather case.
2738 */
5d5ff44f 2739 qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
b095518e 2740
e61e0672
TH		 2741 /* request result TF */
2742 qc->flags |= ATA_QCFLAG_RESULT_TF;
2743
b095518e 2744 return 0;
9a405257
TH		 2745
2746 invalid_fld:
2747 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2748 /* "Invalid field in cdb" */
2749 return 1;
b095518e
JG		 2750}
2751
1da177e4
LT		 2752/**
2753 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2754 * @dev: ATA device
2755 * @cmd: SCSI command opcode to consider
2756 *
2757 * Look up the SCSI command given, and determine whether the
2758 * SCSI command is to be translated or simulated.
2759 *
2760 * RETURNS:
2761 * Pointer to translation function if possible, %NULL if not.
2762 */
2763
2764static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2765{
2766 switch (cmd) {
2767 case READ_6:
2768 case READ_10:
2769 case READ_16:
2770
2771 case WRITE_6:
2772 case WRITE_10:
2773 case WRITE_16:
2774 return ata_scsi_rw_xlat;
2775
2776 case SYNCHRONIZE_CACHE:
2777 if (ata_try_flush_cache(dev))
2778 return ata_scsi_flush_xlat;
2779 break;
2780
2781 case VERIFY:
2782 case VERIFY_16:
2783 return ata_scsi_verify_xlat;
b095518e
JG		 2784
2785 case ATA_12:
2786 case ATA_16:
2787 return ata_scsi_pass_thru;
da61396d 2788
972dcafb
DG		 2789 case START_STOP:
2790 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2791 }
2792
2793 return NULL;
2794}
2795
2796/**
2797 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2798 * @ap: ATA port to which the command was being sent
2799 * @cmd: SCSI command to dump
2800 *
2801 * Prints the contents of a SCSI command via printk().
2802 */
2803
2804static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2805 struct scsi_cmnd *cmd)
2806{
2807#ifdef ATA_DEBUG
2808 struct scsi_device *scsidev = cmd->device;
2809 u8 *scsicmd = cmd->cmnd;
2810
2811 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2812 ap->id,
2813 scsidev->channel, scsidev->id, scsidev->lun,
2814 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2815 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2816 scsicmd[8]);
2817#endif
2818}
2819
2115ea94
TH		 2820static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2821 void (*done)(struct scsi_cmnd *),
2822 struct ata_device *dev)
eb3f0f9c 2823{
2115ea94
TH		 2824 int rc = 0;
2825
eb3f0f9c
BK		 2826 if (dev->class == ATA_DEV_ATA) {
2827 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2828 cmd->cmnd[0]);
2829
2830 if (xlat_func)
2115ea94 2831 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
eb3f0f9c 2832 else
3373efd8 2833 ata_scsi_simulate(dev, cmd, done);
eb3f0f9c 2834 } else
2115ea94
TH		 2835 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2836
2837 return rc;
eb3f0f9c
BK		 2838}
2839
1da177e4
LT		 2840/**
2841 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2842 * @cmd: SCSI command to be sent
2843 * @done: Completion function, called when command is complete
2844 *
2845 * In some cases, this function translates SCSI commands into
2846 * ATA taskfiles, and queues the taskfiles to be sent to
2847 * hardware. In other cases, this function simulates a
2848 * SCSI device by evaluating and responding to certain
2849 * SCSI commands. This creates the overall effect of
2850 * ATA and ATAPI devices appearing as SCSI devices.
2851 *
2852 * LOCKING:
cca3974e 2853 * Releases scsi-layer-held lock, and obtains host lock.
1da177e4
LT		 2854 *
2855 * RETURNS:
2115ea94
TH		 2856 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2857 * 0 otherwise.
1da177e4 2858 */
1da177e4
LT		 2859int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2860{
2861 struct ata_port *ap;
2862 struct ata_device *dev;
2863 struct scsi_device *scsidev = cmd->device;
005a5a06 2864 struct Scsi_Host *shost = scsidev->host;
2115ea94 2865 int rc = 0;
1da177e4 2866
35bb94b1 2867 ap = ata_shost_to_port(shost);
005a5a06
JG		 2868
2869 spin_unlock(shost->host_lock);
ba6a1308 2870 spin_lock(ap->lock);
1da177e4
LT		 2871
2872 ata_scsi_dump_cdb(ap, cmd);
2873
2874 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2875 if (likely(dev))
2115ea94 2876 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2877 else {
1da177e4
LT		 2878 cmd->result = (DID_BAD_TARGET << 16);
2879 done(cmd);
1da177e4
LT		 2880 }
2881
ba6a1308 2882 spin_unlock(ap->lock);
005a5a06 2883 spin_lock(shost->host_lock);
2115ea94 2884 return rc;
1da177e4
LT		 2885}
2886
2887/**
2888 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2889 * @dev: the target device
1da177e4
LT		 2890 * @cmd: SCSI command being sent to device.
2891 * @done: SCSI command completion function.
2892 *
2893 * Interprets and directly executes a select list of SCSI commands
2894 * that can be handled internally.
2895 *
2896 * LOCKING:
cca3974e 2897 * spin_lock_irqsave(host lock)
1da177e4
LT		 2898 */
2899
3373efd8 2900void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2901 void (*done)(struct scsi_cmnd *))
2902{
2903 struct ata_scsi_args args;
057ace5e 2904 const u8 *scsicmd = cmd->cmnd;
1da177e4 2905
9a3dccc4
TH		 2906 args.dev = dev;
2907 args.id = dev->id;
1da177e4
LT		 2908 args.cmd = cmd;
2909 args.done = done;
2910
2911 switch(scsicmd[0]) {
2912 /* no-op's, complete with success */
2913 case SYNCHRONIZE_CACHE:
2914 case REZERO_UNIT:
2915 case SEEK_6:
2916 case SEEK_10:
2917 case TEST_UNIT_READY:
2918 case FORMAT_UNIT: /* FIXME: correct? */
2919 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2920 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2921 break;
2922
2923 case INQUIRY:
2924 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2925 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2926 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2927 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2928 else if (scsicmd[2] == 0x00)
2929 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2930 else if (scsicmd[2] == 0x80)
2931 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2932 else if (scsicmd[2] == 0x83)
2933 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2934 else
ae006510 2935 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2936 break;
2937
2938 case MODE_SENSE:
2939 case MODE_SENSE_10:
2940 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2941 break;
2942
2943 case MODE_SELECT: /* unconditionally return */
2944 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2945 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2946 break;
2947
2948 case READ_CAPACITY:
2949 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2950 break;
2951
2952 case SERVICE_ACTION_IN:
2953 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2954 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2955 else
ae006510 2956 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2957 break;
2958
2959 case REPORT_LUNS:
2960 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2961 break;
2962
b095518e 2963 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2964 case REQUEST_SENSE:
2965
2966 /* all other commands */
2967 default:
ae006510
DG		 2968 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2969 /* "Invalid command operation code" */
2970 done(cmd);
1da177e4
LT		 2971 break;
2972 }
2973}
2974
644dd0cc
JG		 2975void ata_scsi_scan_host(struct ata_port *ap)
2976{
2977 unsigned int i;
2978
198e0fed 2979 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2980 return;
2981
3f19ee8c 2982 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3edebac4
TH		 2983 struct ata_device *dev = &ap->device[i];
2984 struct scsi_device *sdev;
2985
2986 if (!ata_dev_enabled(dev) || dev->sdev)
2987 continue;
3f19ee8c 2988
cca3974e 2989 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
3edebac4
TH		 2990 if (!IS_ERR(sdev)) {
2991 dev->sdev = sdev;
2992 scsi_device_put(sdev);
2993 }
3f19ee8c 2994 }
644dd0cc 2995}
0ea035a3
TH		 2996
2997/**
2998 * ata_scsi_offline_dev - offline attached SCSI device
2999 * @dev: ATA device to offline attached SCSI device for
3000 *
3001 * This function is called from ata_eh_hotplug() and responsible
3002 * for taking the SCSI device attached to @dev offline. This
cca3974e 3003 * function is called with host lock which protects dev->sdev
0ea035a3
TH		 3004 * against clearing.
3005 *
3006 * LOCKING:
cca3974e 3007 * spin_lock_irqsave(host lock)
0ea035a3
TH		 3008 *
3009 * RETURNS:
3010 * 1 if attached SCSI device exists, 0 otherwise.
3011 */
3012int ata_scsi_offline_dev(struct ata_device *dev)
3013{
3014 if (dev->sdev) {
3015 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3016 return 1;
3017 }
3018 return 0;
3019}
580b2102
TH		 3020
3021/**
3022 * ata_scsi_remove_dev - remove attached SCSI device
3023 * @dev: ATA device to remove attached SCSI device for
3024 *
3025 * This function is called from ata_eh_scsi_hotplug() and
3026 * responsible for removing the SCSI device attached to @dev.
3027 *
3028 * LOCKING:
3029 * Kernel thread context (may sleep).
3030 */
3031static void ata_scsi_remove_dev(struct ata_device *dev)
3032{
3033 struct ata_port *ap = dev->ap;
3034 struct scsi_device *sdev;
3035 unsigned long flags;
3036
3037 /* Alas, we need to grab scan_mutex to ensure SCSI device
3038 * state doesn't change underneath us and thus
3039 * scsi_device_get() always succeeds. The mutex locking can
3040 * be removed if there is __scsi_device_get() interface which
3041 * increments reference counts regardless of device state.
3042 */
cca3974e 3043 mutex_lock(&ap->scsi_host->scan_mutex);
ba6a1308 3044 spin_lock_irqsave(ap->lock, flags);
580b2102 3045
cca3974e 3046 /* clearing dev->sdev is protected by host lock */
580b2102
TH		 3047 sdev = dev->sdev;
3048 dev->sdev = NULL;
3049
3050 if (sdev) {
3051 /* If user initiated unplug races with us, sdev can go
cca3974e 3052 * away underneath us after the host lock and
580b2102
TH		 3053 * scan_mutex are released. Hold onto it.
3054 */
3055 if (scsi_device_get(sdev) == 0) {
3056 /* The following ensures the attached sdev is
3057 * offline on return from ata_scsi_offline_dev()
3058 * regardless it wins or loses the race
3059 * against this function.
3060 */
3061 scsi_device_set_state(sdev, SDEV_OFFLINE);
3062 } else {
3063 WARN_ON(1);
3064 sdev = NULL;
3065 }
3066 }
3067
ba6a1308 3068 spin_unlock_irqrestore(ap->lock, flags);
cca3974e 3069 mutex_unlock(&ap->scsi_host->scan_mutex);
580b2102
TH		 3070
3071 if (sdev) {
3072 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3073 sdev->sdev_gendev.bus_id);
3074
3075 scsi_remove_device(sdev);
3076 scsi_device_put(sdev);
3077 }
3078}
3079
3080/**
3081 * ata_scsi_hotplug - SCSI part of hotplug
3082 * @data: Pointer to ATA port to perform SCSI hotplug on
3083 *
3084 * Perform SCSI part of hotplug. It's executed from a separate
3085 * workqueue after EH completes. This is necessary because SCSI
3086 * hot plugging requires working EH and hot unplugging is
3087 * synchronized with hot plugging with a mutex.
3088 *
3089 * LOCKING:
3090 * Kernel thread context (may sleep).
3091 */
3092void ata_scsi_hotplug(void *data)
3093{
3094 struct ata_port *ap = data;
3095 int i;
3096
b51e9e5d 3097 if (ap->pflags & ATA_PFLAG_UNLOADING) {
580b2102
TH		 3098 DPRINTK("ENTER/EXIT - unloading\n");
3099 return;
3100 }
3101
3102 DPRINTK("ENTER\n");
3103
3104 /* unplug detached devices */
3105 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3106 struct ata_device *dev = &ap->device[i];
3107 unsigned long flags;
3108
3109 if (!(dev->flags & ATA_DFLAG_DETACHED))
3110 continue;
3111
ba6a1308 3112 spin_lock_irqsave(ap->lock, flags);
580b2102 3113 dev->flags &= ~ATA_DFLAG_DETACHED;
ba6a1308 3114 spin_unlock_irqrestore(ap->lock, flags);
580b2102
TH		 3115
3116 ata_scsi_remove_dev(dev);
3117 }
3118
3119 /* scan for new ones */
3120 ata_scsi_scan_host(ap);
3121
3122 /* If we scanned while EH was in progress, scan would have
3123 * failed silently. Requeue if there are enabled but
3124 * unattached devices.
3125 */
3126 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3127 struct ata_device *dev = &ap->device[i];
3128 if (ata_dev_enabled(dev) && !dev->sdev) {
3129 queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
3130 break;
3131 }
3132 }
3133
3134 DPRINTK("EXIT\n");
3135}
83c47bcb
TH		 3136
3137/**
3138 * ata_scsi_user_scan - indication for user-initiated bus scan
3139 * @shost: SCSI host to scan
3140 * @channel: Channel to scan
3141 * @id: ID to scan
3142 * @lun: LUN to scan
3143 *
3144 * This function is called when user explicitly requests bus
3145 * scan. Set probe pending flag and invoke EH.
3146 *
3147 * LOCKING:
3148 * SCSI layer (we don't care)
3149 *
3150 * RETURNS:
3151 * Zero.
3152 */
3153static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3154 unsigned int id, unsigned int lun)
3155{
3156 struct ata_port *ap = ata_shost_to_port(shost);
3157 unsigned long flags;
3158 int rc = 0;
3159
3160 if (!ap->ops->error_handler)
3161 return -EOPNOTSUPP;
3162
3163 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3164 (lun != SCAN_WILD_CARD && lun != 0))
3165 return -EINVAL;
3166
ba6a1308 3167 spin_lock_irqsave(ap->lock, flags);
83c47bcb
TH		 3168
3169 if (id == SCAN_WILD_CARD) {
3170 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3171 ap->eh_info.action |= ATA_EH_SOFTRESET;
3172 } else {
3173 struct ata_device *dev = ata_find_dev(ap, id);
3174
3175 if (dev) {
3176 ap->eh_info.probe_mask |= 1 << dev->devno;
3177 ap->eh_info.action |= ATA_EH_SOFTRESET;
28324304 3178 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
83c47bcb
TH		 3179 } else
3180 rc = -EINVAL;
3181 }
3182
3183 if (rc == 0)
3184 ata_port_schedule_eh(ap);
3185
ba6a1308 3186 spin_unlock_irqrestore(ap->lock, flags);
83c47bcb
TH		 3187
3188 return rc;
3189}
3057ac3c 3190
3191/**
d0171269
TH		 3192 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3193 * @data: Pointer to ATA port to perform scsi_rescan_device()
3057ac3c 3194 *
d0171269
TH		 3195 * After ATA pass thru (SAT) commands are executed successfully,
3196 * libata need to propagate the changes to SCSI layer. This
3197 * function must be executed from ata_aux_wq such that sdev
3198 * attach/detach don't race with rescan.
3057ac3c 3199 *
d0171269
TH		 3200 * LOCKING:
3201 * Kernel thread context (may sleep).
3057ac3c 3202 */
3203void ata_scsi_dev_rescan(void *data)
3204{
3205 struct ata_port *ap = data;
3206 struct ata_device *dev;
3207 unsigned int i;
3208
3209 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3210 dev = &ap->device[i];
3211
d0171269 3212 if (ata_dev_enabled(dev) && dev->sdev)
3057ac3c 3213 scsi_rescan_device(&(dev->sdev->sdev_gendev));
3214 }
3215}
80289167
BK		 3216
3217/**
3218 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4f931374 3219 * @host: ATA host container for all SAS ports
80289167 3220 * @port_info: Information from low-level host driver
cca3974e 3221 * @shost: SCSI host that the scsi device is attached to
80289167
BK		 3222 *
3223 * LOCKING:
3224 * PCI/etc. bus probe sem.
3225 *
3226 * RETURNS:
3227 * ata_port pointer on success / NULL on failure.
3228 */
3229
cca3974e 3230struct ata_port *ata_sas_port_alloc(struct ata_host *host,
80289167 3231 struct ata_port_info *port_info,
cca3974e 3232 struct Scsi_Host *shost)
80289167
BK		 3233{
3234 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3235 struct ata_probe_ent *ent;
3236
3237 if (!ap)
3238 return NULL;
3239
cca3974e 3240 ent = ata_probe_ent_alloc(host->dev, port_info);
80289167
BK		 3241 if (!ent) {
3242 kfree(ap);
3243 return NULL;
3244 }
3245
cca3974e
JG		 3246 ata_port_init(ap, host, ent, 0);
3247 ap->lock = shost->host_lock;
80289167
BK		 3248 kfree(ent);
3249 return ap;
3250}
3251EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3252
3253/**
3254 * ata_sas_port_start - Set port up for dma.
3255 * @ap: Port to initialize
3256 *
3257 * Called just after data structures for each port are
3258 * initialized. Allocates DMA pad.
3259 *
3260 * May be used as the port_start() entry in ata_port_operations.
3261 *
3262 * LOCKING:
3263 * Inherited from caller.
3264 */
3265int ata_sas_port_start(struct ata_port *ap)
3266{
3267 return ata_pad_alloc(ap, ap->dev);
3268}
3269EXPORT_SYMBOL_GPL(ata_sas_port_start);
3270
3271/**
3272 * ata_port_stop - Undo ata_sas_port_start()
3273 * @ap: Port to shut down
3274 *
3275 * Frees the DMA pad.
3276 *
3277 * May be used as the port_stop() entry in ata_port_operations.
3278 *
3279 * LOCKING:
3280 * Inherited from caller.
3281 */
3282
3283void ata_sas_port_stop(struct ata_port *ap)
3284{
3285 ata_pad_free(ap, ap->dev);
3286}
3287EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3288
3289/**
3290 * ata_sas_port_init - Initialize a SATA device
3291 * @ap: SATA port to initialize
3292 *
3293 * LOCKING:
3294 * PCI/etc. bus probe sem.
3295 *
3296 * RETURNS:
3297 * Zero on success, non-zero on error.
3298 */
3299
3300int ata_sas_port_init(struct ata_port *ap)
3301{
3302 int rc = ap->ops->port_start(ap);
3303
3304 if (!rc)
3305 rc = ata_bus_probe(ap);
3306
3307 return rc;
3308}
3309EXPORT_SYMBOL_GPL(ata_sas_port_init);
3310
3311/**
3312 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3313 * @ap: SATA port to destroy
3314 *
3315 */
3316
3317void ata_sas_port_destroy(struct ata_port *ap)
3318{
3319 ap->ops->port_stop(ap);
3320 kfree(ap);
3321}
3322EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3323
3324/**
3325 * ata_sas_slave_configure - Default slave_config routine for libata devices
3326 * @sdev: SCSI device to configure
3327 * @ap: ATA port to which SCSI device is attached
3328 *
3329 * RETURNS:
3330 * Zero.
3331 */
3332
3333int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3334{
3335 ata_scsi_sdev_config(sdev);
3336 ata_scsi_dev_config(sdev, ap->device);
3337 return 0;
3338}
3339EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3340
3341/**
3342 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3343 * @cmd: SCSI command to be sent
3344 * @done: Completion function, called when command is complete
3345 * @ap: ATA port to which the command is being sent
3346 *
3347 * RETURNS:
3348 * Zero.
3349 */
3350
3351int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3352 struct ata_port *ap)
3353{
3354 ata_scsi_dump_cdb(ap, cmd);
3355
3356 if (likely(ata_scsi_dev_enabled(ap->device)))
3357 __ata_scsi_queuecmd(cmd, done, ap->device);
3358 else {
3359 cmd->result = (DID_BAD_TARGET << 16);
3360 done(cmd);
3361 }
3362 return 0;
3363}
3364EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
kernel source for telekom puls (alcatel/mediatek)