projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] libata-ncq: update EH to handle NCQ
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / libata-scsi.c
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
1da177e4
LT		 34 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
1da177e4 40#include <scsi/scsi_host.h>
85837ebd 41#include <scsi/scsi_eh.h>
005a5a06 42#include <scsi/scsi_device.h>
193515d5 43#include <scsi/scsi_request.h>
30afc84c 44#include <scsi/scsi_transport.h>
1da177e4 45#include <linux/libata.h>
b095518e 46#include <linux/hdreg.h>
1da177e4
LT		 47#include <asm/uaccess.h>
48
49#include "libata.h"
50
b095518e
JG		 51#define SECTOR_SIZE 512
52
057ace5e 53typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
1da177e4 54static struct ata_device *
057ace5e 55ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
1da177e4 56
00ac37f5
DG		 57#define RW_RECOVERY_MPAGE 0x1
58#define RW_RECOVERY_MPAGE_LEN 12
59#define CACHE_MPAGE 0x8
60#define CACHE_MPAGE_LEN 20
61#define CONTROL_MPAGE 0xa
62#define CONTROL_MPAGE_LEN 12
63#define ALL_MPAGES 0x3f
64#define ALL_SUB_MPAGES 0xff
65
66
67static const u8 def_rw_recovery_mpage[] = {
68 RW_RECOVERY_MPAGE,
69 RW_RECOVERY_MPAGE_LEN - 2,
70 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
71 (1 << 6), /* ARRE (auto read reallocation) */
72 0, /* read retry count */
73 0, 0, 0, 0,
74 0, /* write retry count */
75 0, 0, 0
76};
77
78static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
79 CACHE_MPAGE,
80 CACHE_MPAGE_LEN - 2,
81 0, /* contains WCE, needs to be 0 for logic */
82 0, 0, 0, 0, 0, 0, 0, 0, 0,
83 0, /* contains DRA, needs to be 0 for logic */
84 0, 0, 0, 0, 0, 0, 0
85};
86
87static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
88 CONTROL_MPAGE,
89 CONTROL_MPAGE_LEN - 2,
90 2, /* DSENSE=0, GLTSD=1 */
91 0, /* [QAM+QERR may be 1, see 05-359r1] */
92 0, 0, 0, 0, 0xff, 0xff,
93 0, 30 /* extended self test time, see 05-359r1 */
94};
95
30afc84c
TH		 96/*
97 * libata transport template. libata doesn't do real transport stuff.
98 * It just needs the eh_timed_out hook.
99 */
100struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 101 .eh_strategy_handler = ata_scsi_error,
30afc84c
TH		 102 .eh_timed_out = ata_scsi_timed_out,
103};
104
1da177e4 105
ae006510
DG		 106static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
107 void (*done)(struct scsi_cmnd *))
108{
109 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
110 /* "Invalid field in cbd" */
111 done(cmd);
112}
113
1da177e4
LT		 114/**
115 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
116 * @sdev: SCSI device for which BIOS geometry is to be determined
117 * @bdev: block device associated with @sdev
118 * @capacity: capacity of SCSI device
119 * @geom: location to which geometry will be output
120 *
121 * Generic bios head/sector/cylinder calculator
122 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
123 * mapping. Some situations may arise where the disk is not
124 * bootable if this is not used.
125 *
126 * LOCKING:
127 * Defined by the SCSI layer. We don't really care.
128 *
129 * RETURNS:
130 * Zero.
131 */
132int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
133 sector_t capacity, int geom[])
134{
135 geom[0] = 255;
136 geom[1] = 63;
137 sector_div(capacity, 255*63);
138 geom[2] = capacity;
139
140 return 0;
141}
142
b095518e
JG		 143/**
144 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 145 * @scsidev: Device to which we are issuing command
b095518e
JG		 146 * @arg: User provided data for issuing command
147 *
148 * LOCKING:
149 * Defined by the SCSI layer. We don't really care.
150 *
151 * RETURNS:
152 * Zero on success, negative errno on error.
153 */
154
155int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
156{
157 int rc = 0;
158 u8 scsi_cmd[MAX_COMMAND_SIZE];
159 u8 args[4], *argbuf = NULL;
160 int argsize = 0;
85837ebd
MC		 161 struct scsi_sense_hdr sshdr;
162 enum dma_data_direction data_dir;
b095518e 163
c893a3ae 164 if (arg == NULL)
b095518e
JG		 165 return -EINVAL;
166
167 if (copy_from_user(args, arg, sizeof(args)))
168 return -EFAULT;
169
b095518e
JG		 170 memset(scsi_cmd, 0, sizeof(scsi_cmd));
171
172 if (args[3]) {
173 argsize = SECTOR_SIZE * args[3];
174 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 175 if (argbuf == NULL) {
176 rc = -ENOMEM;
177 goto error;
178 }
b095518e
JG		 179
180 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
181 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
182 block count in sector count field */
85837ebd 183 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 184 } else {
185 scsi_cmd[1] = (3 << 1); /* Non-data */
186 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
85837ebd 187 data_dir = DMA_NONE;
b095518e
JG		 188 }
189
190 scsi_cmd[0] = ATA_16;
191
192 scsi_cmd[4] = args[2];
193 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
194 scsi_cmd[6] = args[3];
195 scsi_cmd[8] = args[1];
196 scsi_cmd[10] = 0x4f;
197 scsi_cmd[12] = 0xc2;
198 } else {
199 scsi_cmd[6] = args[1];
200 }
201 scsi_cmd[14] = args[0];
202
203 /* Good values for timeout and retries? Values below
204 from scsi_ioctl_send_command() for default case... */
85837ebd
MC		 205 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
206 &sshdr, (10*HZ), 5)) {
b095518e
JG		 207 rc = -EIO;
208 goto error;
209 }
210
211 /* Need code to retrieve data from check condition? */
212
213 if ((argbuf)
c893a3ae 214 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 215 rc = -EFAULT;
216error:
b095518e
JG		 217 if (argbuf)
218 kfree(argbuf);
219
220 return rc;
221}
222
223/**
224 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 225 * @scsidev: Device to which we are issuing command
b095518e
JG		 226 * @arg: User provided data for issuing command
227 *
228 * LOCKING:
229 * Defined by the SCSI layer. We don't really care.
230 *
231 * RETURNS:
232 * Zero on success, negative errno on error.
233 */
234int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
235{
236 int rc = 0;
237 u8 scsi_cmd[MAX_COMMAND_SIZE];
238 u8 args[7];
85837ebd 239 struct scsi_sense_hdr sshdr;
b095518e 240
c893a3ae 241 if (arg == NULL)
b095518e
JG		 242 return -EINVAL;
243
244 if (copy_from_user(args, arg, sizeof(args)))
245 return -EFAULT;
246
247 memset(scsi_cmd, 0, sizeof(scsi_cmd));
248 scsi_cmd[0] = ATA_16;
249 scsi_cmd[1] = (3 << 1); /* Non-data */
250 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
251 scsi_cmd[4] = args[1];
252 scsi_cmd[6] = args[2];
253 scsi_cmd[8] = args[3];
254 scsi_cmd[10] = args[4];
255 scsi_cmd[12] = args[5];
256 scsi_cmd[14] = args[0];
257
b095518e 258 /* Good values for timeout and retries? Values below
2e9edbf8 259 from scsi_ioctl_send_command() for default case... */
85837ebd
MC		 260 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
261 (10*HZ), 5))
b095518e 262 rc = -EIO;
b095518e
JG		 263
264 /* Need code to retrieve data from check condition? */
b095518e
JG		 265 return rc;
266}
267
1da177e4
LT		 268int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
269{
1da177e4
LT		 270 int val = -EINVAL, rc = -EINVAL;
271
1da177e4
LT		 272 switch (cmd) {
273 case ATA_IOC_GET_IO32:
274 val = 0;
275 if (copy_to_user(arg, &val, 1))
276 return -EFAULT;
277 return 0;
278
279 case ATA_IOC_SET_IO32:
280 val = (unsigned long) arg;
281 if (val != 0)
282 return -EINVAL;
283 return 0;
284
b095518e
JG		 285 case HDIO_DRIVE_CMD:
286 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
287 return -EACCES;
288 return ata_cmd_ioctl(scsidev, arg);
289
290 case HDIO_DRIVE_TASK:
291 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
292 return -EACCES;
293 return ata_task_ioctl(scsidev, arg);
294
1da177e4
LT		 295 default:
296 rc = -ENOTTY;
297 break;
298 }
299
1da177e4
LT		 300 return rc;
301}
302
303/**
304 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 305 * @dev: ATA device to which the new command is attached
306 * @cmd: SCSI command that originated this ATA command
307 * @done: SCSI command completion function
308 *
309 * Obtain a reference to an unused ata_queued_cmd structure,
310 * which is the basic libata structure representing a single
311 * ATA command sent to the hardware.
312 *
313 * If a command was available, fill in the SCSI-specific
314 * portions of the structure with information on the
315 * current command.
316 *
317 * LOCKING:
318 * spin_lock_irqsave(host_set lock)
319 *
320 * RETURNS:
321 * Command allocated, or %NULL if none available.
322 */
3373efd8 323struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
1da177e4
LT		 324 struct scsi_cmnd *cmd,
325 void (*done)(struct scsi_cmnd *))
326{
327 struct ata_queued_cmd *qc;
328
3373efd8 329 qc = ata_qc_new_init(dev);
1da177e4
LT		 330 if (qc) {
331 qc->scsicmd = cmd;
332 qc->scsidone = done;
333
334 if (cmd->use_sg) {
cedc9a47 335 qc->__sg = (struct scatterlist *) cmd->request_buffer;
1da177e4
LT		 336 qc->n_elem = cmd->use_sg;
337 } else {
cedc9a47 338 qc->__sg = &qc->sgent;
1da177e4
LT		 339 qc->n_elem = 1;
340 }
341 } else {
342 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
343 done(cmd);
344 }
345
346 return qc;
347}
348
b095518e
JG		 349/**
350 * ata_dump_status - user friendly display of error info
351 * @id: id of the port in question
352 * @tf: ptr to filled out taskfile
353 *
354 * Decode and dump the ATA error/status registers for the user so
355 * that they have some idea what really happened at the non
356 * make-believe layer.
357 *
358 * LOCKING:
359 * inherited from caller
360 */
361void ata_dump_status(unsigned id, struct ata_taskfile *tf)
362{
363 u8 stat = tf->command, err = tf->feature;
364
365 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
366 if (stat & ATA_BUSY) {
367 printk("Busy }\n"); /* Data is not valid in this case */
368 } else {
369 if (stat & 0x40) printk("DriveReady ");
370 if (stat & 0x20) printk("DeviceFault ");
371 if (stat & 0x10) printk("SeekComplete ");
372 if (stat & 0x08) printk("DataRequest ");
373 if (stat & 0x04) printk("CorrectedError ");
374 if (stat & 0x02) printk("Index ");
375 if (stat & 0x01) printk("Error ");
376 printk("}\n");
377
378 if (err) {
379 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
380 if (err & 0x04) printk("DriveStatusError ");
381 if (err & 0x80) {
382 if (err & 0x04) printk("BadCRC ");
383 else printk("Sector ");
384 }
385 if (err & 0x40) printk("UncorrectableError ");
386 if (err & 0x10) printk("SectorIdNotFound ");
387 if (err & 0x02) printk("TrackZeroNotFound ");
388 if (err & 0x01) printk("AddrMarkNotFound ");
389 printk("}\n");
390 }
391 }
392}
393
9b847548
JA		 394int ata_scsi_device_resume(struct scsi_device *sdev)
395{
35bb94b1 396 struct ata_port *ap = ata_shost_to_port(sdev->host);
9b847548
JA		 397 struct ata_device *dev = &ap->device[sdev->id];
398
3373efd8 399 return ata_device_resume(dev);
9b847548
JA		 400}
401
082776e4 402int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
9b847548 403{
35bb94b1 404 struct ata_port *ap = ata_shost_to_port(sdev->host);
9b847548
JA		 405 struct ata_device *dev = &ap->device[sdev->id];
406
3373efd8 407 return ata_device_suspend(dev, state);
9b847548
JA		 408}
409
1da177e4
LT		 410/**
411 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 412 * @id: ATA device number
1da177e4 413 * @drv_stat: value contained in ATA status register
b095518e
JG		 414 * @drv_err: value contained in ATA error register
415 * @sk: the sense key we'll fill out
416 * @asc: the additional sense code we'll fill out
417 * @ascq: the additional sense code qualifier we'll fill out
246619da 418 * @verbose: be verbose
1da177e4 419 *
b095518e
JG		 420 * Converts an ATA error into a SCSI error. Fill out pointers to
421 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
422 * format sense blocks.
1da177e4
LT		 423 *
424 * LOCKING:
425 * spin_lock_irqsave(host_set lock)
426 */
2e9edbf8 427void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
246619da 428 u8 *ascq, int verbose)
1da177e4 429{
b095518e 430 int i;
ffe75ef6 431
1da177e4 432 /* Based on the 3ware driver translation table */
98ac62de 433 static const unsigned char sense_table[][4] = {
1da177e4
LT		 434 /* BBD|ECC|ID|MAR */
435 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
436 /* BBD|ECC|ID */
437 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
438 /* ECC|MC|MARK */
439 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
440 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
441 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
442 /* MC|ID|ABRT|TRK0|MARK */
443 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
444 /* MCR|MARK */
445 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
446 /* Bad address mark */
447 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
448 /* TRK0 */
449 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
450 /* Abort & !ICRC */
451 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
452 /* Media change request */
453 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
454 /* SRV */
455 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
456 /* Media change */
457 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
458 /* ECC */
459 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
460 /* BBD - block marked bad */
461 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
462 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
463 };
98ac62de 464 static const unsigned char stat_table[][4] = {
1da177e4
LT		 465 /* Must be first because BUSY means no other bits valid */
466 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
467 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
468 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
469 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
470 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
471 };
1da177e4 472
1da177e4
LT		 473 /*
474 * Is this an error we can process/parse
475 */
b095518e
JG		 476 if (drv_stat & ATA_BUSY) {
477 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 478 }
b095518e
JG		 479
480 if (drv_err) {
481 /* Look for drv_err */
482 for (i = 0; sense_table[i][0] != 0xFF; i++) {
483 /* Look for best matches first */
2e9edbf8 484 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 485 sense_table[i][0]) {
486 *sk = sense_table[i][1];
487 *asc = sense_table[i][2];
488 *ascq = sense_table[i][3];
489 goto translate_done;
490 }
491 }
492 /* No immediate match */
246619da
TH		 493 if (verbose)
494 printk(KERN_WARNING "ata%u: no sense translation for "
495 "error 0x%02x\n", id, drv_err);
1da177e4 496 }
b095518e
JG		 497
498 /* Fall back to interpreting status bits */
499 for (i = 0; stat_table[i][0] != 0xFF; i++) {
500 if (stat_table[i][0] & drv_stat) {
501 *sk = stat_table[i][1];
502 *asc = stat_table[i][2];
503 *ascq = stat_table[i][3];
504 goto translate_done;
1da177e4 505 }
b095518e
JG		 506 }
507 /* No error? Undecoded? */
246619da
TH		 508 if (verbose)
509 printk(KERN_WARNING "ata%u: no sense translation for "
510 "status: 0x%02x\n", id, drv_stat);
b095518e 511
2d202024
AC		 512 /* We need a sensible error return here, which is tricky, and one
513 that won't cause people to do things like return a disk wrongly */
514 *sk = ABORTED_COMMAND;
515 *asc = 0x00;
516 *ascq = 0x00;
b095518e
JG		 517
518 translate_done:
246619da
TH		 519 if (verbose)
520 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
521 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
522 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 523 return;
524}
525
526/*
527 * ata_gen_ata_desc_sense - Generate check condition sense block.
528 * @qc: Command that completed.
529 *
530 * This function is specific to the ATA descriptor format sense
531 * block specified for the ATA pass through commands. Regardless
532 * of whether the command errored or not, return a sense
533 * block. Copy all controller registers into the sense
534 * block. Clear sense key, ASC & ASCQ if there is no error.
535 *
536 * LOCKING:
537 * spin_lock_irqsave(host_set lock)
538 */
539void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
540{
541 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 542 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 543 unsigned char *sb = cmd->sense_buffer;
544 unsigned char *desc = sb + 8;
246619da 545 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 546
547 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
548
0e5dec47 549 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 550
b095518e
JG		 551 /*
552 * Use ata_to_sense_error() to map status register bits
553 * onto sense key, asc & ascq.
554 */
058e55e1
TH		 555 if (qc->err_mask ||
556 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 557 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 558 &sb[1], &sb[2], &sb[3], verbose);
b095518e 559 sb[1] &= 0x0f;
1da177e4
LT		 560 }
561
b095518e
JG		 562 /*
563 * Sense data is current and format is descriptor.
564 */
565 sb[0] = 0x72;
1da177e4 566
b095518e
JG		 567 desc[0] = 0x09;
568
569 /*
570 * Set length of additional sense data.
571 * Since we only populate descriptor 0, the total
572 * length is the same (fixed) length as descriptor 0.
573 */
574 desc[1] = sb[7] = 14;
575
576 /*
577 * Copy registers into sense buffer.
578 */
579 desc[2] = 0x00;
580 desc[3] = tf->feature; /* == error reg */
581 desc[5] = tf->nsect;
582 desc[7] = tf->lbal;
583 desc[9] = tf->lbam;
584 desc[11] = tf->lbah;
585 desc[12] = tf->device;
586 desc[13] = tf->command; /* == status reg */
587
588 /*
589 * Fill in Extend bit, and the high order bytes
590 * if applicable.
591 */
592 if (tf->flags & ATA_TFLAG_LBA48) {
593 desc[2] |= 0x01;
594 desc[4] = tf->hob_nsect;
595 desc[6] = tf->hob_lbal;
596 desc[8] = tf->hob_lbam;
597 desc[10] = tf->hob_lbah;
1da177e4 598 }
b095518e 599}
1da177e4 600
b095518e
JG		 601/**
602 * ata_gen_fixed_sense - generate a SCSI fixed sense block
603 * @qc: Command that we are erroring out
604 *
605 * Leverage ata_to_sense_error() to give us the codes. Fit our
606 * LBA in here if there's room.
607 *
608 * LOCKING:
609 * inherited from caller
610 */
611void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
612{
613 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 614 struct ata_taskfile *tf = &qc->result_tf;
b095518e 615 unsigned char *sb = cmd->sense_buffer;
246619da 616 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 617
618 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
619
0e5dec47 620 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 621
b095518e
JG		 622 /*
623 * Use ata_to_sense_error() to map status register bits
624 * onto sense key, asc & ascq.
625 */
058e55e1
TH		 626 if (qc->err_mask ||
627 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 628 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 629 &sb[2], &sb[12], &sb[13], verbose);
b095518e 630 sb[2] &= 0x0f;
1da177e4 631 }
1da177e4
LT		 632
633 sb[0] = 0x70;
b095518e 634 sb[7] = 0x0a;
0274aa25 635
a7dac447
JG		 636 if (tf->flags & ATA_TFLAG_LBA48) {
637 /* TODO: find solution for LBA48 descriptors */
638 }
639
640 else if (tf->flags & ATA_TFLAG_LBA) {
b095518e
JG		 641 /* A small (28b) LBA will fit in the 32b info field */
642 sb[0] |= 0x80; /* set valid bit */
643 sb[3] = tf->device & 0x0f;
644 sb[4] = tf->lbah;
645 sb[5] = tf->lbam;
646 sb[6] = tf->lbal;
1da177e4 647 }
a7dac447
JG		 648
649 else {
650 /* TODO: C/H/S */
651 }
1da177e4
LT		 652}
653
a6cce2a7
BK		 654static void ata_scsi_sdev_config(struct scsi_device *sdev)
655{
656 sdev->use_10_for_rw = 1;
657 sdev->use_10_for_ms = 1;
658}
659
660static void ata_scsi_dev_config(struct scsi_device *sdev,
661 struct ata_device *dev)
662{
663 unsigned int max_sectors;
664
665 /* TODO: 2048 is an arbitrary number, not the
666 * hardware maximum. This should be increased to
667 * 65534 when Jens Axboe's patch for dynamically
668 * determining max_sectors is merged.
669 */
670 max_sectors = ATA_MAX_SECTORS;
671 if (dev->flags & ATA_DFLAG_LBA48)
672 max_sectors = 2048;
673 if (dev->max_sectors)
674 max_sectors = dev->max_sectors;
675
676 blk_queue_max_sectors(sdev->request_queue, max_sectors);
677
678 /*
679 * SATA DMA transfers must be multiples of 4 byte, so
680 * we need to pad ATAPI transfers using an extra sg.
681 * Decrement max hw segments accordingly.
682 */
683 if (dev->class == ATA_DEV_ATAPI) {
684 request_queue_t *q = sdev->request_queue;
685 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
686 }
687}
688
1da177e4
LT		 689/**
690 * ata_scsi_slave_config - Set SCSI device attributes
691 * @sdev: SCSI device to examine
692 *
693 * This is called before we actually start reading
694 * and writing to the device, to configure certain
695 * SCSI mid-layer behaviors.
696 *
697 * LOCKING:
698 * Defined by SCSI layer. We don't really care.
699 */
700
701int ata_scsi_slave_config(struct scsi_device *sdev)
702{
a6cce2a7 703 ata_scsi_sdev_config(sdev);
1da177e4
LT		 704
705 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
706
707 if (sdev->id < ATA_MAX_DEVICES) {
708 struct ata_port *ap;
709 struct ata_device *dev;
710
35bb94b1 711 ap = ata_shost_to_port(sdev->host);
1da177e4
LT		 712 dev = &ap->device[sdev->id];
713
a6cce2a7 714 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 715 }
716
717 return 0; /* scsi layer doesn't check return value, sigh */
718}
719
972dcafb
DG		 720/**
721 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
722 * @qc: Storage for translated ATA taskfile
723 * @scsicmd: SCSI command to translate
724 *
725 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
726 * (to start). Perhaps these commands should be preceded by
727 * CHECK POWER MODE to see what power mode the device is already in.
728 * [See SAT revision 5 at www.t10.org]
729 *
730 * LOCKING:
731 * spin_lock_irqsave(host_set lock)
732 *
733 * RETURNS:
734 * Zero on success, non-zero on error.
735 */
736
737static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
057ace5e 738 const u8 *scsicmd)
972dcafb
DG		 739{
740 struct ata_taskfile *tf = &qc->tf;
741
742 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
743 tf->protocol = ATA_PROT_NODATA;
744 if (scsicmd[1] & 0x1) {
745 ; /* ignore IMMED bit, violates sat-r05 */
746 }
747 if (scsicmd[4] & 0x2)
ae006510 748 goto invalid_fld; /* LOEJ bit set not supported */
972dcafb 749 if (((scsicmd[4] >> 4) & 0xf) != 0)
ae006510 750 goto invalid_fld; /* power conditions not supported */
972dcafb
DG		 751 if (scsicmd[4] & 0x1) {
752 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 753
754 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 755 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 756
757 tf->lbah = 0x0;
758 tf->lbam = 0x0;
759 tf->lbal = 0x0;
760 tf->device |= ATA_LBA;
761 } else {
762 /* CHS */
763 tf->lbal = 0x1; /* sect */
764 tf->lbam = 0x0; /* cyl low */
765 tf->lbah = 0x0; /* cyl high */
766 }
767
972dcafb
DG		 768 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
769 } else {
770 tf->nsect = 0; /* time period value (0 implies now) */
771 tf->command = ATA_CMD_STANDBY;
772 /* Consider: ATA STANDBY IMMEDIATE command */
773 }
774 /*
775 * Standby and Idle condition timers could be implemented but that
776 * would require libata to implement the Power condition mode page
777 * and allow the user to change it. Changing mode pages requires
778 * MODE SELECT to be implemented.
779 */
780
781 return 0;
ae006510
DG		 782
783invalid_fld:
784 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
785 /* "Invalid field in cbd" */
786 return 1;
972dcafb
DG		 787}
788
789
1da177e4
LT		 790/**
791 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
792 * @qc: Storage for translated ATA taskfile
793 * @scsicmd: SCSI command to translate (ignored)
794 *
795 * Sets up an ATA taskfile to issue FLUSH CACHE or
796 * FLUSH CACHE EXT.
797 *
798 * LOCKING:
799 * spin_lock_irqsave(host_set lock)
800 *
801 * RETURNS:
802 * Zero on success, non-zero on error.
803 */
804
057ace5e 805static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 806{
807 struct ata_taskfile *tf = &qc->tf;
808
809 tf->flags |= ATA_TFLAG_DEVICE;
810 tf->protocol = ATA_PROT_NODATA;
811
07506697 812 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
1da177e4
LT		 813 (ata_id_has_flush_ext(qc->dev->id)))
814 tf->command = ATA_CMD_FLUSH_EXT;
815 else
816 tf->command = ATA_CMD_FLUSH;
817
818 return 0;
819}
820
3aef5231
AL		 821/**
822 * scsi_6_lba_len - Get LBA and transfer length
823 * @scsicmd: SCSI command to translate
824 *
825 * Calculate LBA and transfer length for 6-byte commands.
826 *
827 * RETURNS:
828 * @plba: the LBA
829 * @plen: the transfer length
830 */
831
057ace5e 832static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 833{
834 u64 lba = 0;
835 u32 len = 0;
836
837 VPRINTK("six-byte command\n");
838
839 lba |= ((u64)scsicmd[2]) << 8;
840 lba |= ((u64)scsicmd[3]);
841
842 len |= ((u32)scsicmd[4]);
843
844 *plba = lba;
845 *plen = len;
846}
847
848/**
849 * scsi_10_lba_len - Get LBA and transfer length
850 * @scsicmd: SCSI command to translate
851 *
852 * Calculate LBA and transfer length for 10-byte commands.
853 *
854 * RETURNS:
855 * @plba: the LBA
856 * @plen: the transfer length
857 */
858
057ace5e 859static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 860{
861 u64 lba = 0;
862 u32 len = 0;
863
864 VPRINTK("ten-byte command\n");
865
866 lba |= ((u64)scsicmd[2]) << 24;
867 lba |= ((u64)scsicmd[3]) << 16;
868 lba |= ((u64)scsicmd[4]) << 8;
869 lba |= ((u64)scsicmd[5]);
870
871 len |= ((u32)scsicmd[7]) << 8;
872 len |= ((u32)scsicmd[8]);
873
874 *plba = lba;
875 *plen = len;
876}
877
878/**
879 * scsi_16_lba_len - Get LBA and transfer length
880 * @scsicmd: SCSI command to translate
881 *
882 * Calculate LBA and transfer length for 16-byte commands.
883 *
884 * RETURNS:
885 * @plba: the LBA
886 * @plen: the transfer length
887 */
888
057ace5e 889static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 890{
891 u64 lba = 0;
892 u32 len = 0;
893
894 VPRINTK("sixteen-byte command\n");
895
896 lba |= ((u64)scsicmd[2]) << 56;
897 lba |= ((u64)scsicmd[3]) << 48;
898 lba |= ((u64)scsicmd[4]) << 40;
899 lba |= ((u64)scsicmd[5]) << 32;
900 lba |= ((u64)scsicmd[6]) << 24;
901 lba |= ((u64)scsicmd[7]) << 16;
902 lba |= ((u64)scsicmd[8]) << 8;
903 lba |= ((u64)scsicmd[9]);
904
905 len |= ((u32)scsicmd[10]) << 24;
906 len |= ((u32)scsicmd[11]) << 16;
907 len |= ((u32)scsicmd[12]) << 8;
908 len |= ((u32)scsicmd[13]);
909
910 *plba = lba;
911 *plen = len;
912}
913
1da177e4
LT		 914/**
915 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
916 * @qc: Storage for translated ATA taskfile
917 * @scsicmd: SCSI command to translate
918 *
919 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
920 *
921 * LOCKING:
922 * spin_lock_irqsave(host_set lock)
923 *
924 * RETURNS:
925 * Zero on success, non-zero on error.
926 */
927
057ace5e 928static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 929{
930 struct ata_taskfile *tf = &qc->tf;
8bf62ece 931 struct ata_device *dev = qc->dev;
1da177e4 932 u64 dev_sectors = qc->dev->n_sectors;
3aef5231
AL		 933 u64 block;
934 u32 n_block;
1da177e4
LT		 935
936 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
937 tf->protocol = ATA_PROT_NODATA;
1da177e4 938
3aef5231
AL		 939 if (scsicmd[0] == VERIFY)
940 scsi_10_lba_len(scsicmd, &block, &n_block);
941 else if (scsicmd[0] == VERIFY_16)
942 scsi_16_lba_len(scsicmd, &block, &n_block);
1da177e4 943 else
ae006510 944 goto invalid_fld;
1da177e4 945
8bf62ece 946 if (!n_block)
ae006510 947 goto nothing_to_do;
8bf62ece 948 if (block >= dev_sectors)
ae006510 949 goto out_of_range;
8bf62ece 950 if ((block + n_block) > dev_sectors)
ae006510 951 goto out_of_range;
1da177e4 952
07506697
AL		 953 if (dev->flags & ATA_DFLAG_LBA) {
954 tf->flags |= ATA_TFLAG_LBA;
955
c6a33e24
AL		 956 if (lba_28_ok(block, n_block)) {
957 /* use LBA28 */
958 tf->command = ATA_CMD_VERIFY;
959 tf->device |= (block >> 24) & 0xf;
960 } else if (lba_48_ok(block, n_block)) {
961 if (!(dev->flags & ATA_DFLAG_LBA48))
962 goto out_of_range;
07506697
AL		 963
964 /* use LBA48 */
965 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 966 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 967
8bf62ece 968 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 969
8bf62ece
AL		 970 tf->hob_lbah = (block >> 40) & 0xff;
971 tf->hob_lbam = (block >> 32) & 0xff;
972 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 973 } else
974 /* request too large even for LBA48 */
975 goto out_of_range;
8bf62ece
AL		 976
977 tf->nsect = n_block & 0xff;
1da177e4 978
8bf62ece
AL		 979 tf->lbah = (block >> 16) & 0xff;
980 tf->lbam = (block >> 8) & 0xff;
981 tf->lbal = block & 0xff;
1da177e4 982
8bf62ece
AL		 983 tf->device |= ATA_LBA;
984 } else {
985 /* CHS */
986 u32 sect, head, cyl, track;
987
c6a33e24
AL		 988 if (!lba_28_ok(block, n_block))
989 goto out_of_range;
07506697 990
8bf62ece
AL		 991 /* Convert LBA to CHS */
992 track = (u32)block / dev->sectors;
993 cyl = track / dev->heads;
994 head = track % dev->heads;
995 sect = (u32)block % dev->sectors + 1;
996
c187c4b5
AL		 997 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
998 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 999
1000 /* Check whether the converted CHS can fit.
1001 Cylinder: 0-65535
8bf62ece
AL		 1002 Head: 0-15
1003 Sector: 1-255*/
2e9edbf8 1004 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1005 goto out_of_range;
2e9edbf8 1006
8bf62ece
AL		 1007 tf->command = ATA_CMD_VERIFY;
1008 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1009 tf->lbal = sect;
1010 tf->lbam = cyl;
1011 tf->lbah = cyl >> 8;
1012 tf->device |= head;
1013 }
1da177e4
LT		 1014
1015 return 0;
ae006510
DG		 1016
1017invalid_fld:
1018 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1019 /* "Invalid field in cbd" */
1020 return 1;
1021
1022out_of_range:
1023 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1024 /* "Logical Block Address out of range" */
1025 return 1;
1026
1027nothing_to_do:
1028 qc->scsicmd->result = SAM_STAT_GOOD;
1029 return 1;
1da177e4
LT		 1030}
1031
1032/**
1033 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1034 * @qc: Storage for translated ATA taskfile
1035 * @scsicmd: SCSI command to translate
1036 *
1037 * Converts any of six SCSI read/write commands into the
1038 * ATA counterpart, including starting sector (LBA),
1039 * sector count, and taking into account the device's LBA48
1040 * support.
1041 *
1042 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1043 * %WRITE_16 are currently supported.
1044 *
1045 * LOCKING:
1046 * spin_lock_irqsave(host_set lock)
1047 *
1048 * RETURNS:
1049 * Zero on success, non-zero on error.
1050 */
1051
057ace5e 1052static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1053{
1054 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1055 struct ata_device *dev = qc->dev;
3aef5231
AL		 1056 u64 block;
1057 u32 n_block;
1da177e4 1058
27197367 1059 qc->flags |= ATA_QCFLAG_IO;
1da177e4 1060 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1da177e4 1061
8cbd6df1
AL		 1062 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1063 scsicmd[0] == WRITE_16)
1da177e4 1064 tf->flags |= ATA_TFLAG_WRITE;
1da177e4 1065
9a3dccc4 1066 /* Calculate the SCSI LBA, transfer length and FUA. */
3aef5231
AL		 1067 switch (scsicmd[0]) {
1068 case READ_10:
1069 case WRITE_10:
1070 scsi_10_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1071 if (unlikely(scsicmd[1] & (1 << 3)))
1072 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1073 break;
1074 case READ_6:
1075 case WRITE_6:
1076 scsi_6_lba_len(scsicmd, &block, &n_block);
c187c4b5
AL		 1077
1078 /* for 6-byte r/w commands, transfer length 0
1079 * means 256 blocks of data, not 0 block.
1080 */
76b2bf9b
JG		 1081 if (!n_block)
1082 n_block = 256;
3aef5231
AL		 1083 break;
1084 case READ_16:
1085 case WRITE_16:
1086 scsi_16_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1087 if (unlikely(scsicmd[1] & (1 << 3)))
1088 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1089 break;
1090 default:
8bf62ece 1091 DPRINTK("no-byte command\n");
ae006510 1092 goto invalid_fld;
1da177e4
LT		 1093 }
1094
8bf62ece
AL		 1095 /* Check and compose ATA command */
1096 if (!n_block)
c187c4b5
AL		 1097 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1098 * length 0 means transfer 0 block of data.
1099 * However, for ATA R/W commands, sector count 0 means
1100 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1101 *
1102 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1103 */
ae006510 1104 goto nothing_to_do;
1da177e4 1105
3dc1d881
TH		 1106 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
1107 /* yay, NCQ */
1108 if (!lba_48_ok(block, n_block))
1109 goto out_of_range;
1110
1111 tf->protocol = ATA_PROT_NCQ;
1112 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1113
1114 if (tf->flags & ATA_TFLAG_WRITE)
1115 tf->command = ATA_CMD_FPDMA_WRITE;
1116 else
1117 tf->command = ATA_CMD_FPDMA_READ;
1118
1119 qc->nsect = n_block;
1120
1121 tf->nsect = qc->tag << 3;
1122 tf->hob_feature = (n_block >> 8) & 0xff;
1123 tf->feature = n_block & 0xff;
1124
1125 tf->hob_lbah = (block >> 40) & 0xff;
1126 tf->hob_lbam = (block >> 32) & 0xff;
1127 tf->hob_lbal = (block >> 24) & 0xff;
1128 tf->lbah = (block >> 16) & 0xff;
1129 tf->lbam = (block >> 8) & 0xff;
1130 tf->lbal = block & 0xff;
1131
1132 tf->device = 1 << 6;
1133 if (tf->flags & ATA_TFLAG_FUA)
1134 tf->device |= 1 << 7;
1135 } else if (dev->flags & ATA_DFLAG_LBA) {
07506697
AL		 1136 tf->flags |= ATA_TFLAG_LBA;
1137
c6a33e24
AL		 1138 if (lba_28_ok(block, n_block)) {
1139 /* use LBA28 */
1140 tf->device |= (block >> 24) & 0xf;
1141 } else if (lba_48_ok(block, n_block)) {
1142 if (!(dev->flags & ATA_DFLAG_LBA48))
ae006510 1143 goto out_of_range;
1da177e4 1144
07506697
AL		 1145 /* use LBA48 */
1146 tf->flags |= ATA_TFLAG_LBA48;
1147
8bf62ece
AL		 1148 tf->hob_nsect = (n_block >> 8) & 0xff;
1149
1150 tf->hob_lbah = (block >> 40) & 0xff;
1151 tf->hob_lbam = (block >> 32) & 0xff;
1152 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1153 } else
1154 /* request too large even for LBA48 */
1155 goto out_of_range;
c187c4b5 1156
9a3dccc4
TH		 1157 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1158 goto invalid_fld;
8cbd6df1 1159
8bf62ece
AL		 1160 qc->nsect = n_block;
1161 tf->nsect = n_block & 0xff;
1da177e4 1162
8bf62ece
AL		 1163 tf->lbah = (block >> 16) & 0xff;
1164 tf->lbam = (block >> 8) & 0xff;
1165 tf->lbal = block & 0xff;
1da177e4 1166
8bf62ece 1167 tf->device |= ATA_LBA;
2e9edbf8 1168 } else {
8bf62ece
AL		 1169 /* CHS */
1170 u32 sect, head, cyl, track;
1171
1172 /* The request -may- be too large for CHS addressing. */
c6a33e24 1173 if (!lba_28_ok(block, n_block))
ae006510 1174 goto out_of_range;
c187c4b5 1175
9a3dccc4
TH		 1176 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1177 goto invalid_fld;
8cbd6df1 1178
8bf62ece
AL		 1179 /* Convert LBA to CHS */
1180 track = (u32)block / dev->sectors;
1181 cyl = track / dev->heads;
1182 head = track % dev->heads;
1183 sect = (u32)block % dev->sectors + 1;
1184
c187c4b5 1185 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
8bf62ece 1186 (u32)block, track, cyl, head, sect);
c187c4b5 1187
2e9edbf8
JG		 1188 /* Check whether the converted CHS can fit.
1189 Cylinder: 0-65535
8bf62ece
AL		 1190 Head: 0-15
1191 Sector: 1-255*/
c187c4b5 1192 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1193 goto out_of_range;
c187c4b5 1194
8bf62ece
AL		 1195 qc->nsect = n_block;
1196 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1197 tf->lbal = sect;
1198 tf->lbam = cyl;
1199 tf->lbah = cyl >> 8;
1200 tf->device |= head;
1da177e4
LT		 1201 }
1202
8bf62ece 1203 return 0;
ae006510
DG		 1204
1205invalid_fld:
1206 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1207 /* "Invalid field in cbd" */
1208 return 1;
1209
1210out_of_range:
1211 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1212 /* "Logical Block Address out of range" */
1213 return 1;
1214
1215nothing_to_do:
1216 qc->scsicmd->result = SAM_STAT_GOOD;
1217 return 1;
1da177e4
LT		 1218}
1219
77853bf2 1220static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 1221{
1222 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1223 u8 *cdb = cmd->cmnd;
a22e2eb0 1224 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1225
1226 /* For ATA pass thru (SAT) commands, generate a sense block if
1227 * user mandated it or if there's an error. Note that if we
1228 * generate because the user forced us to, a check condition
1229 * is generated and the ATA register values are returned
1230 * whether the command completed successfully or not. If there
1231 * was no error, SK, ASC and ASCQ will all be zero.
1232 */
a7dac447
JG		 1233 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1234 ((cdb[2] & 0x20) || need_sense)) {
b095518e
JG		 1235 ata_gen_ata_desc_sense(qc);
1236 } else {
1237 if (!need_sense) {
1238 cmd->result = SAM_STAT_GOOD;
1239 } else {
1240 /* TODO: decide which descriptor format to use
1241 * for 48b LBA devices and call that here
1242 * instead of the fixed desc, which is only
1243 * good for smaller LBA (and maybe CHS?)
1244 * devices.
1245 */
1246 ata_gen_fixed_sense(qc);
1247 }
1248 }
1da177e4 1249
246619da 1250 if (need_sense && !qc->ap->ops->error_handler)
e61e0672 1251 ata_dump_status(qc->ap->id, &qc->result_tf);
1da177e4
LT		 1252
1253 qc->scsidone(cmd);
1254
77853bf2 1255 ata_qc_free(qc);
1da177e4
LT		 1256}
1257
3dc1d881
TH		 1258/**
1259 * ata_scmd_need_defer - Check whether we need to defer scmd
1260 * @dev: ATA device to which the command is addressed
1261 * @is_io: Is the command IO (and thus possibly NCQ)?
1262 *
1263 * NCQ and non-NCQ commands cannot run together. As upper layer
1264 * only knows the queue depth, we are responsible for maintaining
1265 * exclusion. This function checks whether a new command can be
1266 * issued to @dev.
1267 *
1268 * LOCKING:
1269 * spin_lock_irqsave(host_set lock)
1270 *
1271 * RETURNS:
1272 * 1 if deferring is needed, 0 otherwise.
1273 */
1274static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1275{
1276 struct ata_port *ap = dev->ap;
1277
1278 if (!(dev->flags & ATA_DFLAG_NCQ))
1279 return 0;
1280
1281 if (is_io) {
1282 if (!ata_tag_valid(ap->active_tag))
1283 return 0;
1284 } else {
1285 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1286 return 0;
1287 }
1288 return 1;
1289}
1290
1da177e4
LT		 1291/**
1292 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1293 * @dev: ATA device to which the command is addressed
1294 * @cmd: SCSI command to execute
1295 * @done: SCSI command completion function
1296 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1297 *
1298 * Our ->queuecommand() function has decided that the SCSI
1299 * command issued can be directly translated into an ATA
1300 * command, rather than handled internally.
1301 *
1302 * This function sets up an ata_queued_cmd structure for the
1303 * SCSI command, and sends that ata_queued_cmd to the hardware.
1304 *
ae006510
DG		 1305 * The xlat_func argument (actor) returns 0 if ready to execute
1306 * ATA command, else 1 to finish translation. If 1 is returned
1307 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1308 * to be set reflecting an error condition or clean (early)
1309 * termination.
1310 *
1da177e4
LT		 1311 * LOCKING:
1312 * spin_lock_irqsave(host_set lock)
2115ea94
TH		 1313 *
1314 * RETURNS:
1315 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1316 * needs to be deferred.
1da177e4 1317 */
2115ea94
TH		 1318static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1319 void (*done)(struct scsi_cmnd *),
1320 ata_xlat_func_t xlat_func)
1da177e4
LT		 1321{
1322 struct ata_queued_cmd *qc;
1323 u8 *scsicmd = cmd->cmnd;
3dc1d881 1324 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1325
1326 VPRINTK("ENTER\n");
1327
3dc1d881
TH		 1328 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1329 goto defer;
1330
3373efd8 1331 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1332 if (!qc)
ae006510 1333 goto err_mem;
1da177e4
LT		 1334
1335 /* data is present; dma-map it */
be7db055
CH		 1336 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1337 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1338 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1339 ata_dev_printk(dev, KERN_WARNING,
1340 "WARNING: zero len r/w req\n");
ae006510 1341 goto err_did;
1da177e4
LT		 1342 }
1343
1344 if (cmd->use_sg)
1345 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1346 else
1347 ata_sg_init_one(qc, cmd->request_buffer,
1348 cmd->request_bufflen);
1349
1350 qc->dma_dir = cmd->sc_data_direction;
1351 }
1352
1353 qc->complete_fn = ata_scsi_qc_complete;
1354
1355 if (xlat_func(qc, scsicmd))
ae006510 1356 goto early_finish;
1da177e4
LT		 1357
1358 /* select device, send command to hardware */
8e0e694a 1359 ata_qc_issue(qc);
1da177e4
LT		 1360
1361 VPRINTK("EXIT\n");
2115ea94 1362 return 0;
1da177e4 1363
ae006510
DG		 1364early_finish:
1365 ata_qc_free(qc);
1366 done(cmd);
1367 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1368 return 0;
ae006510
DG		 1369
1370err_did:
1da177e4 1371 ata_qc_free(qc);
ae006510
DG		 1372err_mem:
1373 cmd->result = (DID_ERROR << 16);
1374 done(cmd);
1375 DPRINTK("EXIT - internal\n");
2115ea94 1376 return 0;
3dc1d881
TH		 1377
1378defer:
1379 DPRINTK("EXIT - defer\n");
1380 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1381}
1382
1383/**
1384 * ata_scsi_rbuf_get - Map response buffer.
1385 * @cmd: SCSI command containing buffer to be mapped.
1386 * @buf_out: Pointer to mapped area.
1387 *
1388 * Maps buffer contained within SCSI command @cmd.
1389 *
1390 * LOCKING:
1391 * spin_lock_irqsave(host_set lock)
1392 *
1393 * RETURNS:
1394 * Length of response buffer.
1395 */
1396
1397static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1398{
1399 u8 *buf;
1400 unsigned int buflen;
1401
1402 if (cmd->use_sg) {
1403 struct scatterlist *sg;
1404
1405 sg = (struct scatterlist *) cmd->request_buffer;
1406 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1407 buflen = sg->length;
1408 } else {
1409 buf = cmd->request_buffer;
1410 buflen = cmd->request_bufflen;
1411 }
1412
1413 *buf_out = buf;
1414 return buflen;
1415}
1416
1417/**
1418 * ata_scsi_rbuf_put - Unmap response buffer.
1419 * @cmd: SCSI command containing buffer to be unmapped.
1420 * @buf: buffer to unmap
1421 *
1422 * Unmaps response buffer contained within @cmd.
1423 *
1424 * LOCKING:
1425 * spin_lock_irqsave(host_set lock)
1426 */
1427
1428static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1429{
1430 if (cmd->use_sg) {
1431 struct scatterlist *sg;
1432
1433 sg = (struct scatterlist *) cmd->request_buffer;
1434 kunmap_atomic(buf - sg->offset, KM_USER0);
1435 }
1436}
1437
1438/**
1439 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1440 * @args: device IDENTIFY data / SCSI command of interest.
1441 * @actor: Callback hook for desired SCSI command simulator
1442 *
1443 * Takes care of the hard work of simulating a SCSI command...
1444 * Mapping the response buffer, calling the command's handler,
1445 * and handling the handler's return value. This return value
1446 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1447 * completed successfully (0), or not (in which case cmd->result
1448 * and sense buffer are assumed to be set).
1da177e4
LT		 1449 *
1450 * LOCKING:
1451 * spin_lock_irqsave(host_set lock)
1452 */
1453
1454void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1455 unsigned int (*actor) (struct ata_scsi_args *args,
1456 u8 *rbuf, unsigned int buflen))
1457{
1458 u8 *rbuf;
1459 unsigned int buflen, rc;
1460 struct scsi_cmnd *cmd = args->cmd;
1461
1462 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1463 memset(rbuf, 0, buflen);
1464 rc = actor(args, rbuf, buflen);
1465 ata_scsi_rbuf_put(cmd, rbuf);
1466
ae006510 1467 if (rc == 0)
1da177e4 1468 cmd->result = SAM_STAT_GOOD;
ae006510 1469 args->done(cmd);
1da177e4
LT		 1470}
1471
1472/**
1473 * ata_scsiop_inq_std - Simulate INQUIRY command
1474 * @args: device IDENTIFY data / SCSI command of interest.
1475 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1476 * @buflen: Response buffer length.
1477 *
1478 * Returns standard device identification data associated
b142eb65 1479 * with non-VPD INQUIRY command output.
1da177e4
LT		 1480 *
1481 * LOCKING:
1482 * spin_lock_irqsave(host_set lock)
1483 */
1484
1485unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1486 unsigned int buflen)
1487{
1488 u8 hdr[] = {
1489 TYPE_DISK,
1490 0,
1491 0x5, /* claim SPC-3 version compatibility */
1492 2,
1493 95 - 4
1494 };
1495
1496 /* set scsi removeable (RMB) bit per ata bit */
1497 if (ata_id_removeable(args->id))
1498 hdr[1] |= (1 << 7);
1499
1500 VPRINTK("ENTER\n");
1501
1502 memcpy(rbuf, hdr, sizeof(hdr));
1503
1504 if (buflen > 35) {
1505 memcpy(&rbuf[8], "ATA ", 8);
6a62a04d
TH		 1506 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1507 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1da177e4
LT		 1508 if (rbuf[32] == 0 || rbuf[32] == ' ')
1509 memcpy(&rbuf[32], "n/a ", 4);
1510 }
1511
1512 if (buflen > 63) {
1513 const u8 versions[] = {
1514 0x60, /* SAM-3 (no version claimed) */
1515
1516 0x03,
1517 0x20, /* SBC-2 (no version claimed) */
1518
1519 0x02,
1520 0x60 /* SPC-3 (no version claimed) */
1521 };
1522
1523 memcpy(rbuf + 59, versions, sizeof(versions));
1524 }
1525
1526 return 0;
1527}
1528
1529/**
b142eb65 1530 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1531 * @args: device IDENTIFY data / SCSI command of interest.
1532 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1533 * @buflen: Response buffer length.
1534 *
b142eb65 1535 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1536 *
1537 * LOCKING:
1538 * spin_lock_irqsave(host_set lock)
1539 */
1540
1541unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1542 unsigned int buflen)
1543{
1544 const u8 pages[] = {
1545 0x00, /* page 0x00, this page */
1546 0x80, /* page 0x80, unit serial no page */
1547 0x83 /* page 0x83, device ident page */
1548 };
b142eb65 1549 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1550
1551 if (buflen > 6)
1552 memcpy(rbuf + 4, pages, sizeof(pages));
1553
1554 return 0;
1555}
1556
1557/**
b142eb65 1558 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1559 * @args: device IDENTIFY data / SCSI command of interest.
1560 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1561 * @buflen: Response buffer length.
1562 *
1563 * Returns ATA device serial number.
1564 *
1565 * LOCKING:
1566 * spin_lock_irqsave(host_set lock)
1567 */
1568
1569unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1570 unsigned int buflen)
1571{
1572 const u8 hdr[] = {
1573 0,
1574 0x80, /* this page code */
1575 0,
1576 ATA_SERNO_LEN, /* page len */
1577 };
1578 memcpy(rbuf, hdr, sizeof(hdr));
1579
1580 if (buflen > (ATA_SERNO_LEN + 4 - 1))
6a62a04d
TH		 1581 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1582 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1da177e4
LT		 1583
1584 return 0;
1585}
1586
1da177e4 1587/**
b142eb65 1588 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1589 * @args: device IDENTIFY data / SCSI command of interest.
1590 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1591 * @buflen: Response buffer length.
1592 *
b142eb65
JG		 1593 * Yields two logical unit device identification designators:
1594 * - vendor specific ASCII containing the ATA serial number
1595 * - SAT defined "t10 vendor id based" containing ASCII vendor
1596 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1597 *
1598 * LOCKING:
1599 * spin_lock_irqsave(host_set lock)
1600 */
1601
1602unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1603 unsigned int buflen)
1604{
b142eb65
JG		 1605 int num;
1606 const int sat_model_serial_desc_len = 68;
1607 const int ata_model_byte_len = 40;
1da177e4 1608
b142eb65
JG		 1609 rbuf[1] = 0x83; /* this page code */
1610 num = 4;
1611
1612 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1613 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1614 rbuf[num + 0] = 2;
b142eb65
JG		 1615 rbuf[num + 3] = ATA_SERNO_LEN;
1616 num += 4;
1617 ata_id_string(args->id, (unsigned char *) rbuf + num,
1618 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1619 num += ATA_SERNO_LEN;
1da177e4 1620 }
b142eb65
JG		 1621 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1622 /* SAT defined lu model and serial numbers descriptor */
1623 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1624 rbuf[num + 0] = 2;
1625 rbuf[num + 1] = 1;
b142eb65
JG		 1626 rbuf[num + 3] = sat_model_serial_desc_len;
1627 num += 4;
1628 memcpy(rbuf + num, "ATA ", 8);
1629 num += 8;
1630 ata_id_string(args->id, (unsigned char *) rbuf + num,
1631 ATA_ID_PROD_OFS, ata_model_byte_len);
1632 num += ata_model_byte_len;
1633 ata_id_string(args->id, (unsigned char *) rbuf + num,
1634 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1635 num += ATA_SERNO_LEN;
1636 }
1637 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1638 return 0;
1639}
1640
1641/**
0cba632b 1642 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1643 * @args: device IDENTIFY data / SCSI command of interest.
1644 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1645 * @buflen: Response buffer length.
1646 *
1647 * No operation. Simply returns success to caller, to indicate
1648 * that the caller should successfully complete this SCSI command.
1649 *
1650 * LOCKING:
1651 * spin_lock_irqsave(host_set lock)
1652 */
1653
1654unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1655 unsigned int buflen)
1656{
1657 VPRINTK("ENTER\n");
1658 return 0;
1659}
1660
1661/**
1662 * ata_msense_push - Push data onto MODE SENSE data output buffer
1663 * @ptr_io: (input/output) Location to store more output data
1664 * @last: End of output data buffer
1665 * @buf: Pointer to BLOB being added to output buffer
1666 * @buflen: Length of BLOB
1667 *
1668 * Store MODE SENSE data on an output buffer.
1669 *
1670 * LOCKING:
1671 * None.
1672 */
1673
1674static void ata_msense_push(u8 **ptr_io, const u8 *last,
1675 const u8 *buf, unsigned int buflen)
1676{
1677 u8 *ptr = *ptr_io;
1678
1679 if ((ptr + buflen - 1) > last)
1680 return;
1681
1682 memcpy(ptr, buf, buflen);
1683
1684 ptr += buflen;
1685
1686 *ptr_io = ptr;
1687}
1688
1689/**
1690 * ata_msense_caching - Simulate MODE SENSE caching info page
1691 * @id: device IDENTIFY data
1692 * @ptr_io: (input/output) Location to store more output data
1693 * @last: End of output data buffer
1694 *
1695 * Generate a caching info page, which conditionally indicates
1696 * write caching to the SCSI layer, depending on device
1697 * capabilities.
1698 *
1699 * LOCKING:
1700 * None.
1701 */
1702
1703static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1704 const u8 *last)
1705{
00ac37f5 1706 u8 page[CACHE_MPAGE_LEN];
1da177e4 1707
00ac37f5 1708 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1709 if (ata_id_wcache_enabled(id))
1710 page[2] |= (1 << 2); /* write cache enable */
1711 if (!ata_id_rahead_enabled(id))
1712 page[12] |= (1 << 5); /* disable read ahead */
1713
1714 ata_msense_push(ptr_io, last, page, sizeof(page));
1715 return sizeof(page);
1716}
1717
1718/**
1719 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1720 * @dev: Device associated with this MODE SENSE command
1721 * @ptr_io: (input/output) Location to store more output data
1722 * @last: End of output data buffer
1723 *
1724 * Generate a generic MODE SENSE control mode page.
1725 *
1726 * LOCKING:
1727 * None.
1728 */
1729
1730static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1731{
00ac37f5
DG		 1732 ata_msense_push(ptr_io, last, def_control_mpage,
1733 sizeof(def_control_mpage));
1734 return sizeof(def_control_mpage);
1da177e4
LT		 1735}
1736
1737/**
1738 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1739 * @dev: Device associated with this MODE SENSE command
1740 * @ptr_io: (input/output) Location to store more output data
1741 * @last: End of output data buffer
1742 *
1743 * Generate a generic MODE SENSE r/w error recovery page.
1744 *
1745 * LOCKING:
1746 * None.
1747 */
1748
1749static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1750{
1da177e4 1751
00ac37f5
DG		 1752 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1753 sizeof(def_rw_recovery_mpage));
1754 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1755}
1756
48bdc8ec
JA		 1757/*
1758 * We can turn this into a real blacklist if it's needed, for now just
1759 * blacklist any Maxtor BANC1G10 revision firmware
1760 */
1761static int ata_dev_supports_fua(u16 *id)
1762{
1763 unsigned char model[41], fw[9];
1764
c3c013a2
JG		 1765 if (!libata_fua)
1766 return 0;
48bdc8ec
JA		 1767 if (!ata_id_has_fua(id))
1768 return 0;
1769
6a62a04d
TH		 1770 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1771 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
48bdc8ec 1772
2e02671d 1773 if (strcmp(model, "Maxtor"))
48bdc8ec 1774 return 1;
2e02671d 1775 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 1776 return 1;
1777
1778 return 0; /* blacklisted */
1779}
1780
1da177e4
LT		 1781/**
1782 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1783 * @args: device IDENTIFY data / SCSI command of interest.
1784 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1785 * @buflen: Response buffer length.
1786 *
00ac37f5
DG		 1787 * Simulate MODE SENSE commands. Assume this is invoked for direct
1788 * access devices (e.g. disks) only. There should be no block
1789 * descriptor for other device types.
1da177e4
LT		 1790 *
1791 * LOCKING:
1792 * spin_lock_irqsave(host_set lock)
1793 */
1794
1795unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1796 unsigned int buflen)
1797{
9a3dccc4 1798 struct ata_device *dev = args->dev;
1da177e4 1799 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 1800 const u8 sat_blk_desc[] = {
1801 0, 0, 0, 0, /* number of blocks: sat unspecified */
1802 0,
1803 0, 0x2, 0x0 /* block length: 512 bytes */
1804 };
1805 u8 pg, spg;
1806 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 1807 u8 dpofua;
1da177e4
LT		 1808
1809 VPRINTK("ENTER\n");
1810
1811 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 1812 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1813 /*
1814 * LLBA bit in msense(10) ignored (compliant)
1da177e4 1815 */
00ac37f5 1816
1da177e4 1817 page_control = scsicmd[2] >> 6;
ae006510
DG		 1818 switch (page_control) {
1819 case 0: /* current */
1820 break; /* supported */
1821 case 3: /* saved */
1822 goto saving_not_supp;
1823 case 1: /* changeable */
1824 case 2: /* defaults */
1825 default:
1826 goto invalid_fld;
1827 }
1da177e4 1828
00ac37f5
DG		 1829 if (six_byte) {
1830 output_len = 4 + (ebd ? 8 : 0);
1831 alloc_len = scsicmd[4];
1832 } else {
1833 output_len = 8 + (ebd ? 8 : 0);
1834 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1835 }
1836 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 1837
1838 p = rbuf + output_len;
00ac37f5 1839 last = rbuf + minlen - 1;
1da177e4 1840
00ac37f5
DG		 1841 pg = scsicmd[2] & 0x3f;
1842 spg = scsicmd[3];
1843 /*
1844 * No mode subpages supported (yet) but asking for _all_
1845 * subpages may be valid
1846 */
1847 if (spg && (spg != ALL_SUB_MPAGES))
1848 goto invalid_fld;
1849
1850 switch(pg) {
1851 case RW_RECOVERY_MPAGE:
1da177e4
LT		 1852 output_len += ata_msense_rw_recovery(&p, last);
1853 break;
1854
00ac37f5 1855 case CACHE_MPAGE:
1da177e4
LT		 1856 output_len += ata_msense_caching(args->id, &p, last);
1857 break;
1858
00ac37f5 1859 case CONTROL_MPAGE: {
1da177e4
LT		 1860 output_len += ata_msense_ctl_mode(&p, last);
1861 break;
1862 }
1863
00ac37f5 1864 case ALL_MPAGES:
1da177e4
LT		 1865 output_len += ata_msense_rw_recovery(&p, last);
1866 output_len += ata_msense_caching(args->id, &p, last);
1867 output_len += ata_msense_ctl_mode(&p, last);
1868 break;
1869
1870 default: /* invalid page code */
ae006510 1871 goto invalid_fld;
1da177e4
LT		 1872 }
1873
00ac37f5
DG		 1874 if (minlen < 1)
1875 return 0;
9a3dccc4
TH		 1876
1877 dpofua = 0;
48bdc8ec 1878 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
9a3dccc4
TH		 1879 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1880 dpofua = 1 << 4;
1881
1da177e4
LT		 1882 if (six_byte) {
1883 output_len--;
1884 rbuf[0] = output_len;
9a3dccc4
TH		 1885 if (minlen > 2)
1886 rbuf[2] |= dpofua;
00ac37f5
DG		 1887 if (ebd) {
1888 if (minlen > 3)
1889 rbuf[3] = sizeof(sat_blk_desc);
1890 if (minlen > 11)
1891 memcpy(rbuf + 4, sat_blk_desc,
1892 sizeof(sat_blk_desc));
1893 }
1da177e4
LT		 1894 } else {
1895 output_len -= 2;
1896 rbuf[0] = output_len >> 8;
00ac37f5
DG		 1897 if (minlen > 1)
1898 rbuf[1] = output_len;
9a3dccc4
TH		 1899 if (minlen > 3)
1900 rbuf[3] |= dpofua;
00ac37f5
DG		 1901 if (ebd) {
1902 if (minlen > 7)
1903 rbuf[7] = sizeof(sat_blk_desc);
1904 if (minlen > 15)
1905 memcpy(rbuf + 8, sat_blk_desc,
1906 sizeof(sat_blk_desc));
1907 }
1da177e4 1908 }
1da177e4 1909 return 0;
ae006510
DG		 1910
1911invalid_fld:
1912 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1913 /* "Invalid field in cbd" */
1914 return 1;
1915
1916saving_not_supp:
1917 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1918 /* "Saving parameters not supported" */
1919 return 1;
1da177e4
LT		 1920}
1921
1922/**
1923 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1924 * @args: device IDENTIFY data / SCSI command of interest.
1925 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1926 * @buflen: Response buffer length.
1927 *
1928 * Simulate READ CAPACITY commands.
1929 *
1930 * LOCKING:
1931 * spin_lock_irqsave(host_set lock)
1932 */
1933
1934unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1935 unsigned int buflen)
1936{
1937 u64 n_sectors;
1938 u32 tmp;
1939
1940 VPRINTK("ENTER\n");
1941
8bf62ece
AL		 1942 if (ata_id_has_lba(args->id)) {
1943 if (ata_id_has_lba48(args->id))
1944 n_sectors = ata_id_u64(args->id, 100);
1945 else
1946 n_sectors = ata_id_u32(args->id, 60);
1947 } else {
1948 /* CHS default translation */
1949 n_sectors = args->id[1] * args->id[3] * args->id[6];
1950
1951 if (ata_id_current_chs_valid(args->id))
1952 /* CHS current translation */
1953 n_sectors = ata_id_u32(args->id, 57);
1954 }
1955
1da177e4
LT		 1956 n_sectors--; /* ATA TotalUserSectors - 1 */
1957
1da177e4 1958 if (args->cmd->cmnd[0] == READ_CAPACITY) {
0c144d0d
PP		 1959 if( n_sectors >= 0xffffffffULL )
1960 tmp = 0xffffffff ; /* Return max count on overflow */
1961 else
1962 tmp = n_sectors ;
1963
1da177e4
LT		 1964 /* sector count, 32-bit */
1965 rbuf[0] = tmp >> (8 * 3);
1966 rbuf[1] = tmp >> (8 * 2);
1967 rbuf[2] = tmp >> (8 * 1);
1968 rbuf[3] = tmp;
1969
1970 /* sector size */
1971 tmp = ATA_SECT_SIZE;
1972 rbuf[6] = tmp >> 8;
1973 rbuf[7] = tmp;
1974
1975 } else {
1976 /* sector count, 64-bit */
0c144d0d
PP		 1977 tmp = n_sectors >> (8 * 4);
1978 rbuf[2] = tmp >> (8 * 3);
1979 rbuf[3] = tmp >> (8 * 2);
1980 rbuf[4] = tmp >> (8 * 1);
1981 rbuf[5] = tmp;
1982 tmp = n_sectors;
1da177e4
LT		 1983 rbuf[6] = tmp >> (8 * 3);
1984 rbuf[7] = tmp >> (8 * 2);
1985 rbuf[8] = tmp >> (8 * 1);
1986 rbuf[9] = tmp;
1987
1988 /* sector size */
1989 tmp = ATA_SECT_SIZE;
1990 rbuf[12] = tmp >> 8;
1991 rbuf[13] = tmp;
1992 }
1993
1994 return 0;
1995}
1996
1997/**
1998 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1999 * @args: device IDENTIFY data / SCSI command of interest.
2000 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2001 * @buflen: Response buffer length.
2002 *
2003 * Simulate REPORT LUNS command.
2004 *
2005 * LOCKING:
2006 * spin_lock_irqsave(host_set lock)
2007 */
2008
2009unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2010 unsigned int buflen)
2011{
2012 VPRINTK("ENTER\n");
2013 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2014
2015 return 0;
2016}
2017
845c5834
DG		 2018/**
2019 * ata_scsi_set_sense - Set SCSI sense data and status
2020 * @cmd: SCSI request to be handled
2021 * @sk: SCSI-defined sense key
2022 * @asc: SCSI-defined additional sense code
2023 * @ascq: SCSI-defined additional sense code qualifier
2024 *
2025 * Helper function that builds a valid fixed format, current
2026 * response code and the given sense key (sk), additional sense
2027 * code (asc) and additional sense code qualifier (ascq) with
2028 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2029 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2030 *
2031 * LOCKING:
2032 * Not required
2033 */
2034
2035void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2036{
2037 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2038
2039 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2040 cmd->sense_buffer[2] = sk;
2041 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2042 cmd->sense_buffer[12] = asc;
2043 cmd->sense_buffer[13] = ascq;
2044}
2045
1da177e4
LT		 2046/**
2047 * ata_scsi_badcmd - End a SCSI request with an error
2048 * @cmd: SCSI request to be handled
2049 * @done: SCSI command completion function
2050 * @asc: SCSI-defined additional sense code
2051 * @ascq: SCSI-defined additional sense code qualifier
2052 *
2053 * Helper function that completes a SCSI command with
2054 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2055 * and the specified additional sense codes.
2056 *
2057 * LOCKING:
2058 * spin_lock_irqsave(host_set lock)
2059 */
2060
2061void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2062{
2063 DPRINTK("ENTER\n");
ae006510 2064 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2065
2066 done(cmd);
2067}
2068
77853bf2 2069static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2070{
74e6c8c3 2071 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2072 /* FIXME: not quite right; we don't want the
2073 * translation of taskfile registers into
2074 * a sense descriptors, since that's only
2075 * correct for ATA, not ATAPI
2076 */
2077 ata_gen_ata_desc_sense(qc);
74e6c8c3 2078 }
a939c963 2079
c6e6e666 2080 qc->scsidone(qc->scsicmd);
77853bf2 2081 ata_qc_free(qc);
c6e6e666 2082}
a939c963 2083
c6e6e666
JG		 2084/* is it pointless to prefer PIO for "safety reasons"? */
2085static inline int ata_pio_use_silly(struct ata_port *ap)
2086{
2087 return (ap->flags & ATA_FLAG_PIO_DMA);
2088}
2089
2090static void atapi_request_sense(struct ata_queued_cmd *qc)
2091{
2092 struct ata_port *ap = qc->ap;
2093 struct scsi_cmnd *cmd = qc->scsicmd;
2094
2095 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2096
2097 /* FIXME: is this needed? */
2098 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2099
c6e6e666
JG		 2100 ap->ops->tf_read(ap, &qc->tf);
2101
2102 /* fill these in, for the case where they are -not- overwritten */
2103 cmd->sense_buffer[0] = 0x70;
2104 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2105
2106 ata_qc_reinit(qc);
2107
a939c963
JG		 2108 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2109 qc->dma_dir = DMA_FROM_DEVICE;
2110
6e7846e9 2111 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2112 qc->cdb[0] = REQUEST_SENSE;
2113 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2114
2115 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2116 qc->tf.command = ATA_CMD_PACKET;
2117
c6e6e666
JG		 2118 if (ata_pio_use_silly(ap)) {
2119 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2120 qc->tf.feature |= ATAPI_PKT_DMA;
2121 } else {
2122 qc->tf.protocol = ATA_PROT_ATAPI;
2123 qc->tf.lbam = (8 * 1024) & 0xff;
2124 qc->tf.lbah = (8 * 1024) >> 8;
2125 }
a939c963
JG		 2126 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2127
c6e6e666 2128 qc->complete_fn = atapi_sense_complete;
a939c963 2129
8e0e694a 2130 ata_qc_issue(qc);
a939c963
JG		 2131
2132 DPRINTK("EXIT\n");
2133}
2134
77853bf2 2135static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2136{
2137 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2138 unsigned int err_mask = qc->err_mask;
1da177e4 2139
a7dac447 2140 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2141
246619da
TH		 2142 /* handle completion from new EH */
2143 if (unlikely(qc->ap->ops->error_handler &&
2144 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2145
2146 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2147 /* FIXME: not quite right; we don't want the
2148 * translation of taskfile registers into a
2149 * sense descriptors, since that's only
2150 * correct for ATA, not ATAPI
2151 */
2152 ata_gen_ata_desc_sense(qc);
2153 }
2154
2155 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2156 qc->scsidone(cmd);
2157 ata_qc_free(qc);
2158 return;
2159 }
2160
2161 /* successful completion or old EH failure path */
a7dac447 2162 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2163 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2164 atapi_request_sense(qc);
77853bf2 2165 return;
74e6c8c3 2166 } else if (unlikely(err_mask)) {
a7dac447
JG		 2167 /* FIXME: not quite right; we don't want the
2168 * translation of taskfile registers into
2169 * a sense descriptors, since that's only
2170 * correct for ATA, not ATAPI
2171 */
2172 ata_gen_ata_desc_sense(qc);
74e6c8c3 2173 } else {
1da177e4
LT		 2174 u8 *scsicmd = cmd->cmnd;
2175
fd71da46 2176 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2177 u8 *buf = NULL;
2178 unsigned int buflen;
2179
2180 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2181
2182 /* ATAPI devices typically report zero for their SCSI version,
2183 * and sometimes deviate from the spec WRT response data
2184 * format. If SCSI version is reported as zero like normal,
2185 * then we make the following fixups: 1) Fake MMC-5 version,
2186 * to indicate to the Linux scsi midlayer this is a modern
2187 * device. 2) Ensure response data format / ATAPI information
2188 * are always correct.
a15dbeb4
JG		 2189 */
2190 if (buf[2] == 0) {
2191 buf[2] = 0x5;
2192 buf[3] = 0x32;
2193 }
2194
1da177e4
LT		 2195 ata_scsi_rbuf_put(cmd, buf);
2196 }
a15dbeb4 2197
1da177e4
LT		 2198 cmd->result = SAM_STAT_GOOD;
2199 }
2200
2201 qc->scsidone(cmd);
77853bf2 2202 ata_qc_free(qc);
1da177e4
LT		 2203}
2204/**
2205 * atapi_xlat - Initialize PACKET taskfile
2206 * @qc: command structure to be initialized
2207 * @scsicmd: SCSI CDB associated with this PACKET command
2208 *
2209 * LOCKING:
2210 * spin_lock_irqsave(host_set lock)
2211 *
2212 * RETURNS:
2213 * Zero on success, non-zero on failure.
2214 */
2215
057ace5e 2216static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 2217{
2218 struct scsi_cmnd *cmd = qc->scsicmd;
2219 struct ata_device *dev = qc->dev;
2220 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db055 2221 int nodata = (cmd->sc_data_direction == DMA_NONE);
1da177e4
LT		 2222
2223 if (!using_pio)
2224 /* Check whether ATAPI DMA is safe */
2225 if (ata_check_atapi_dma(qc))
2226 using_pio = 1;
2227
6e7846e9 2228 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
1da177e4
LT		 2229
2230 qc->complete_fn = atapi_qc_complete;
2231
2232 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db055 2233 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2234 qc->tf.flags |= ATA_TFLAG_WRITE;
2235 DPRINTK("direction: write\n");
2236 }
2237
2238 qc->tf.command = ATA_CMD_PACKET;
2239
2240 /* no data, or PIO data xfer */
2241 if (using_pio || nodata) {
2242 if (nodata)
2243 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2244 else
2245 qc->tf.protocol = ATA_PROT_ATAPI;
2246 qc->tf.lbam = (8 * 1024) & 0xff;
2247 qc->tf.lbah = (8 * 1024) >> 8;
2248 }
2249
2250 /* DMA data xfer */
2251 else {
2252 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2253 qc->tf.feature |= ATAPI_PKT_DMA;
2254
95de719a
AL		 2255 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2256 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2257 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2258 }
2259
2260 qc->nbytes = cmd->bufflen;
2261
2262 return 0;
2263}
2264
2265/**
2266 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2267 * @ap: ATA port to which the device is attached
2268 * @scsidev: SCSI device from which we derive the ATA device
2269 *
2270 * Given various information provided in struct scsi_cmnd,
2271 * map that onto an ATA bus, and using that mapping
2272 * determine which ata_device is associated with the
2273 * SCSI command to be sent.
2274 *
2275 * LOCKING:
2276 * spin_lock_irqsave(host_set lock)
2277 *
2278 * RETURNS:
2279 * Associated ATA device, or %NULL if not found.
2280 */
2281
2282static struct ata_device *
057ace5e 2283ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4
LT		 2284{
2285 struct ata_device *dev;
2286
2287 /* skip commands not addressed to targets we simulate */
2288 if (likely(scsidev->id < ATA_MAX_DEVICES))
2289 dev = &ap->device[scsidev->id];
2290 else
2291 return NULL;
2292
2293 if (unlikely((scsidev->channel != 0) ||
2294 (scsidev->lun != 0)))
2295 return NULL;
2296
e1211e3f 2297 if (unlikely(!ata_dev_enabled(dev)))
1da177e4
LT		 2298 return NULL;
2299
50630195
JG		 2300 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2301 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
f15a1daf
TH		 2302 ata_dev_printk(dev, KERN_WARNING,
2303 "WARNING: ATAPI is %s, device ignored.\n",
2304 atapi_enabled ? "not supported with this driver" : "disabled");
1623c81e 2305 return NULL;
50630195 2306 }
1623c81e 2307 }
1da177e4
LT		 2308
2309 return dev;
2310}
2311
b095518e
JG		 2312/*
2313 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2314 * @byte1: Byte 1 from pass-thru CDB.
2315 *
2316 * RETURNS:
2317 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2318 */
2319static u8
2320ata_scsi_map_proto(u8 byte1)
2321{
2322 switch((byte1 & 0x1e) >> 1) {
2323 case 3: /* Non-data */
2324 return ATA_PROT_NODATA;
2325
2326 case 6: /* DMA */
2327 return ATA_PROT_DMA;
2328
2329 case 4: /* PIO Data-in */
2330 case 5: /* PIO Data-out */
b095518e
JG		 2331 return ATA_PROT_PIO;
2332
2333 case 10: /* Device Reset */
2334 case 0: /* Hard Reset */
2335 case 1: /* SRST */
2336 case 2: /* Bus Idle */
2337 case 7: /* Packet */
2338 case 8: /* DMA Queued */
2339 case 9: /* Device Diagnostic */
2340 case 11: /* UDMA Data-in */
2341 case 12: /* UDMA Data-Out */
2342 case 13: /* FPDMA */
2343 default: /* Reserved */
2344 break;
2345 }
2346
2347 return ATA_PROT_UNKNOWN;
2348}
2349
2350/**
2351 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2352 * @qc: command structure to be initialized
8e8b77dd 2353 * @scsicmd: SCSI command to convert
b095518e
JG		 2354 *
2355 * Handles either 12 or 16-byte versions of the CDB.
2356 *
2357 * RETURNS:
2358 * Zero on success, non-zero on failure.
2359 */
2360static unsigned int
00ac37f5 2361ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
b095518e
JG		 2362{
2363 struct ata_taskfile *tf = &(qc->tf);
2364 struct scsi_cmnd *cmd = qc->scsicmd;
2365
2366 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
9a405257 2367 goto invalid_fld;
b095518e 2368
f59b0cf8
AL		 2369 if (scsicmd[1] & 0xe0)
2370 /* PIO multi not supported yet */
2371 goto invalid_fld;
2372
b095518e
JG		 2373 /*
2374 * 12 and 16 byte CDBs use different offsets to
2375 * provide the various register values.
2376 */
2377 if (scsicmd[0] == ATA_16) {
2378 /*
2379 * 16-byte CDB - may contain extended commands.
2380 *
2381 * If that is the case, copy the upper byte register values.
2382 */
2383 if (scsicmd[1] & 0x01) {
2384 tf->hob_feature = scsicmd[3];
2385 tf->hob_nsect = scsicmd[5];
2386 tf->hob_lbal = scsicmd[7];
2387 tf->hob_lbam = scsicmd[9];
2388 tf->hob_lbah = scsicmd[11];
2389 tf->flags |= ATA_TFLAG_LBA48;
2390 } else
2391 tf->flags &= ~ATA_TFLAG_LBA48;
2392
2393 /*
2394 * Always copy low byte, device and command registers.
2395 */
2396 tf->feature = scsicmd[4];
2397 tf->nsect = scsicmd[6];
2398 tf->lbal = scsicmd[8];
2399 tf->lbam = scsicmd[10];
2400 tf->lbah = scsicmd[12];
2401 tf->device = scsicmd[13];
2402 tf->command = scsicmd[14];
2403 } else {
2404 /*
2405 * 12-byte CDB - incapable of extended commands.
2406 */
2407 tf->flags &= ~ATA_TFLAG_LBA48;
2408
2409 tf->feature = scsicmd[3];
2410 tf->nsect = scsicmd[4];
2411 tf->lbal = scsicmd[5];
2412 tf->lbam = scsicmd[6];
2413 tf->lbah = scsicmd[7];
2414 tf->device = scsicmd[8];
2415 tf->command = scsicmd[9];
2416 }
dcc2d1e7
ML		 2417 /*
2418 * If slave is possible, enforce correct master/slave bit
2419 */
2420 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2421 tf->device = qc->dev->devno ?
2422 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e
JG		 2423
2424 /*
2425 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2426 * SET_FEATURES - XFER MODE must be preceded/succeeded
2427 * by an update to hardware-specific registers for each
2428 * controller (i.e. the reason for ->set_piomode(),
2429 * ->set_dmamode(), and ->post_set_mode() hooks).
2430 */
2431 if ((tf->command == ATA_CMD_SET_FEATURES)
2432 && (tf->feature == SETFEATURES_XFER))
9a405257 2433 goto invalid_fld;
b095518e
JG		 2434
2435 /*
2436 * Set flags so that all registers will be written,
2437 * and pass on write indication (used for PIO/DMA
2438 * setup.)
2439 */
2440 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2441
0274aa25 2442 if (cmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2443 tf->flags |= ATA_TFLAG_WRITE;
2444
2445 /*
2446 * Set transfer length.
2447 *
2448 * TODO: find out if we need to do more here to
2449 * cover scatter/gather case.
2450 */
2451 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2452
e61e0672
TH		 2453 /* request result TF */
2454 qc->flags |= ATA_QCFLAG_RESULT_TF;
2455
b095518e 2456 return 0;
9a405257
TH		 2457
2458 invalid_fld:
2459 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2460 /* "Invalid field in cdb" */
2461 return 1;
b095518e
JG		 2462}
2463
1da177e4
LT		 2464/**
2465 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2466 * @dev: ATA device
2467 * @cmd: SCSI command opcode to consider
2468 *
2469 * Look up the SCSI command given, and determine whether the
2470 * SCSI command is to be translated or simulated.
2471 *
2472 * RETURNS:
2473 * Pointer to translation function if possible, %NULL if not.
2474 */
2475
2476static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2477{
2478 switch (cmd) {
2479 case READ_6:
2480 case READ_10:
2481 case READ_16:
2482
2483 case WRITE_6:
2484 case WRITE_10:
2485 case WRITE_16:
2486 return ata_scsi_rw_xlat;
2487
2488 case SYNCHRONIZE_CACHE:
2489 if (ata_try_flush_cache(dev))
2490 return ata_scsi_flush_xlat;
2491 break;
2492
2493 case VERIFY:
2494 case VERIFY_16:
2495 return ata_scsi_verify_xlat;
b095518e
JG		 2496
2497 case ATA_12:
2498 case ATA_16:
2499 return ata_scsi_pass_thru;
da61396d 2500
972dcafb
DG		 2501 case START_STOP:
2502 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2503 }
2504
2505 return NULL;
2506}
2507
2508/**
2509 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2510 * @ap: ATA port to which the command was being sent
2511 * @cmd: SCSI command to dump
2512 *
2513 * Prints the contents of a SCSI command via printk().
2514 */
2515
2516static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2517 struct scsi_cmnd *cmd)
2518{
2519#ifdef ATA_DEBUG
2520 struct scsi_device *scsidev = cmd->device;
2521 u8 *scsicmd = cmd->cmnd;
2522
2523 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2524 ap->id,
2525 scsidev->channel, scsidev->id, scsidev->lun,
2526 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2527 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2528 scsicmd[8]);
2529#endif
2530}
2531
2115ea94
TH		 2532static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2533 void (*done)(struct scsi_cmnd *),
2534 struct ata_device *dev)
eb3f0f9c 2535{
2115ea94
TH		 2536 int rc = 0;
2537
eb3f0f9c
BK		 2538 if (dev->class == ATA_DEV_ATA) {
2539 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2540 cmd->cmnd[0]);
2541
2542 if (xlat_func)
2115ea94 2543 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
eb3f0f9c 2544 else
3373efd8 2545 ata_scsi_simulate(dev, cmd, done);
eb3f0f9c 2546 } else
2115ea94
TH		 2547 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2548
2549 return rc;
eb3f0f9c
BK		 2550}
2551
1da177e4
LT		 2552/**
2553 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2554 * @cmd: SCSI command to be sent
2555 * @done: Completion function, called when command is complete
2556 *
2557 * In some cases, this function translates SCSI commands into
2558 * ATA taskfiles, and queues the taskfiles to be sent to
2559 * hardware. In other cases, this function simulates a
2560 * SCSI device by evaluating and responding to certain
2561 * SCSI commands. This creates the overall effect of
2562 * ATA and ATAPI devices appearing as SCSI devices.
2563 *
2564 * LOCKING:
2565 * Releases scsi-layer-held lock, and obtains host_set lock.
2566 *
2567 * RETURNS:
2115ea94
TH		 2568 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2569 * 0 otherwise.
1da177e4 2570 */
1da177e4
LT		 2571int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2572{
2573 struct ata_port *ap;
2574 struct ata_device *dev;
2575 struct scsi_device *scsidev = cmd->device;
005a5a06 2576 struct Scsi_Host *shost = scsidev->host;
2115ea94 2577 int rc = 0;
1da177e4 2578
35bb94b1 2579 ap = ata_shost_to_port(shost);
005a5a06
JG		 2580
2581 spin_unlock(shost->host_lock);
2582 spin_lock(&ap->host_set->lock);
1da177e4
LT		 2583
2584 ata_scsi_dump_cdb(ap, cmd);
2585
2586 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2587 if (likely(dev))
2115ea94 2588 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2589 else {
1da177e4
LT		 2590 cmd->result = (DID_BAD_TARGET << 16);
2591 done(cmd);
1da177e4
LT		 2592 }
2593
005a5a06
JG		 2594 spin_unlock(&ap->host_set->lock);
2595 spin_lock(shost->host_lock);
2115ea94 2596 return rc;
1da177e4
LT		 2597}
2598
2599/**
2600 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2601 * @dev: the target device
1da177e4
LT		 2602 * @cmd: SCSI command being sent to device.
2603 * @done: SCSI command completion function.
2604 *
2605 * Interprets and directly executes a select list of SCSI commands
2606 * that can be handled internally.
2607 *
2608 * LOCKING:
2609 * spin_lock_irqsave(host_set lock)
2610 */
2611
3373efd8 2612void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2613 void (*done)(struct scsi_cmnd *))
2614{
2615 struct ata_scsi_args args;
057ace5e 2616 const u8 *scsicmd = cmd->cmnd;
1da177e4 2617
9a3dccc4
TH		 2618 args.dev = dev;
2619 args.id = dev->id;
1da177e4
LT		 2620 args.cmd = cmd;
2621 args.done = done;
2622
2623 switch(scsicmd[0]) {
2624 /* no-op's, complete with success */
2625 case SYNCHRONIZE_CACHE:
2626 case REZERO_UNIT:
2627 case SEEK_6:
2628 case SEEK_10:
2629 case TEST_UNIT_READY:
2630 case FORMAT_UNIT: /* FIXME: correct? */
2631 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2632 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2633 break;
2634
2635 case INQUIRY:
2636 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2637 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2638 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2639 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2640 else if (scsicmd[2] == 0x00)
2641 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2642 else if (scsicmd[2] == 0x80)
2643 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2644 else if (scsicmd[2] == 0x83)
2645 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2646 else
ae006510 2647 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2648 break;
2649
2650 case MODE_SENSE:
2651 case MODE_SENSE_10:
2652 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2653 break;
2654
2655 case MODE_SELECT: /* unconditionally return */
2656 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2657 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2658 break;
2659
2660 case READ_CAPACITY:
2661 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2662 break;
2663
2664 case SERVICE_ACTION_IN:
2665 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2666 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2667 else
ae006510 2668 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2669 break;
2670
2671 case REPORT_LUNS:
2672 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2673 break;
2674
b095518e 2675 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2676 case REQUEST_SENSE:
2677
2678 /* all other commands */
2679 default:
ae006510
DG		 2680 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2681 /* "Invalid command operation code" */
2682 done(cmd);
1da177e4
LT		 2683 break;
2684 }
2685}
2686
644dd0cc
JG		 2687void ata_scsi_scan_host(struct ata_port *ap)
2688{
3f19ee8c 2689 struct ata_device *dev;
644dd0cc
JG		 2690 unsigned int i;
2691
198e0fed 2692 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2693 return;
2694
3f19ee8c
JG		 2695 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2696 dev = &ap->device[i];
2697
e1211e3f 2698 if (ata_dev_enabled(dev))
3f19ee8c
JG		 2699 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
2700 }
644dd0cc
JG		 2701}
2702
7b70fc03
TH		 2703/**
2704 * ata_schedule_scsi_eh - schedule EH for SCSI host
2705 * @shost: SCSI host to invoke error handling on.
2706 *
2707 * Schedule SCSI EH without scmd. This is a hack.
2708 *
2709 * LOCKING:
2710 * spin_lock_irqsave(host_set lock)
2711 **/
2712void ata_schedule_scsi_eh(struct Scsi_Host *shost)
2713{
2714 unsigned long flags;
2715
2716 spin_lock_irqsave(shost->host_lock, flags);
2717
2718 if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||
2719 scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {
2720 shost->host_eh_scheduled++;
2721 scsi_eh_wakeup(shost);
2722 }
2723
2724 spin_unlock_irqrestore(shost->host_lock, flags);
2725}
kernel source for telekom puls (alcatel/mediatek)