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[PATCH] sata_sil24: update sil24_hardreset()
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / 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>
85837ebd 41#include <scsi/scsi_eh.h>
005a5a06 42#include <scsi/scsi_device.h>
193515d5 43#include <scsi/scsi_request.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);
60
1da177e4 61
00ac37f5
DG		 62#define RW_RECOVERY_MPAGE 0x1
63#define RW_RECOVERY_MPAGE_LEN 12
64#define CACHE_MPAGE 0x8
65#define CACHE_MPAGE_LEN 20
66#define CONTROL_MPAGE 0xa
67#define CONTROL_MPAGE_LEN 12
68#define ALL_MPAGES 0x3f
69#define ALL_SUB_MPAGES 0xff
70
71
72static const u8 def_rw_recovery_mpage[] = {
73 RW_RECOVERY_MPAGE,
74 RW_RECOVERY_MPAGE_LEN - 2,
75 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
76 (1 << 6), /* ARRE (auto read reallocation) */
77 0, /* read retry count */
78 0, 0, 0, 0,
79 0, /* write retry count */
80 0, 0, 0
81};
82
83static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
84 CACHE_MPAGE,
85 CACHE_MPAGE_LEN - 2,
86 0, /* contains WCE, needs to be 0 for logic */
87 0, 0, 0, 0, 0, 0, 0, 0, 0,
88 0, /* contains DRA, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0
90};
91
92static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
93 CONTROL_MPAGE,
94 CONTROL_MPAGE_LEN - 2,
95 2, /* DSENSE=0, GLTSD=1 */
96 0, /* [QAM+QERR may be 1, see 05-359r1] */
97 0, 0, 0, 0, 0xff, 0xff,
98 0, 30 /* extended self test time, see 05-359r1 */
99};
100
30afc84c
TH		 101/*
102 * libata transport template. libata doesn't do real transport stuff.
103 * It just needs the eh_timed_out hook.
104 */
105struct scsi_transport_template ata_scsi_transport_template = {
9227c33d 106 .eh_strategy_handler = ata_scsi_error,
30afc84c
TH		 107 .eh_timed_out = ata_scsi_timed_out,
108};
109
1da177e4 110
ae006510
DG		 111static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
112 void (*done)(struct scsi_cmnd *))
113{
114 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
115 /* "Invalid field in cbd" */
116 done(cmd);
117}
118
1da177e4
LT		 119/**
120 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
121 * @sdev: SCSI device for which BIOS geometry is to be determined
122 * @bdev: block device associated with @sdev
123 * @capacity: capacity of SCSI device
124 * @geom: location to which geometry will be output
125 *
126 * Generic bios head/sector/cylinder calculator
127 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
128 * mapping. Some situations may arise where the disk is not
129 * bootable if this is not used.
130 *
131 * LOCKING:
132 * Defined by the SCSI layer. We don't really care.
133 *
134 * RETURNS:
135 * Zero.
136 */
137int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
138 sector_t capacity, int geom[])
139{
140 geom[0] = 255;
141 geom[1] = 63;
142 sector_div(capacity, 255*63);
143 geom[2] = capacity;
144
145 return 0;
146}
147
b095518e
JG		 148/**
149 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
8e8b77dd 150 * @scsidev: Device to which we are issuing command
b095518e
JG		 151 * @arg: User provided data for issuing command
152 *
153 * LOCKING:
154 * Defined by the SCSI layer. We don't really care.
155 *
156 * RETURNS:
157 * Zero on success, negative errno on error.
158 */
159
160int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
161{
162 int rc = 0;
163 u8 scsi_cmd[MAX_COMMAND_SIZE];
164 u8 args[4], *argbuf = NULL;
165 int argsize = 0;
85837ebd
MC		 166 struct scsi_sense_hdr sshdr;
167 enum dma_data_direction data_dir;
b095518e 168
c893a3ae 169 if (arg == NULL)
b095518e
JG		 170 return -EINVAL;
171
172 if (copy_from_user(args, arg, sizeof(args)))
173 return -EFAULT;
174
b095518e
JG		 175 memset(scsi_cmd, 0, sizeof(scsi_cmd));
176
177 if (args[3]) {
178 argsize = SECTOR_SIZE * args[3];
179 argbuf = kmalloc(argsize, GFP_KERNEL);
54dac83c
JR		 180 if (argbuf == NULL) {
181 rc = -ENOMEM;
182 goto error;
183 }
b095518e
JG		 184
185 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
186 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
187 block count in sector count field */
85837ebd 188 data_dir = DMA_FROM_DEVICE;
b095518e
JG		 189 } else {
190 scsi_cmd[1] = (3 << 1); /* Non-data */
191 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
85837ebd 192 data_dir = DMA_NONE;
b095518e
JG		 193 }
194
195 scsi_cmd[0] = ATA_16;
196
197 scsi_cmd[4] = args[2];
198 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
199 scsi_cmd[6] = args[3];
200 scsi_cmd[8] = args[1];
201 scsi_cmd[10] = 0x4f;
202 scsi_cmd[12] = 0xc2;
203 } else {
204 scsi_cmd[6] = args[1];
205 }
206 scsi_cmd[14] = args[0];
207
208 /* Good values for timeout and retries? Values below
209 from scsi_ioctl_send_command() for default case... */
85837ebd
MC		 210 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
211 &sshdr, (10*HZ), 5)) {
b095518e
JG		 212 rc = -EIO;
213 goto error;
214 }
215
216 /* Need code to retrieve data from check condition? */
217
218 if ((argbuf)
c893a3ae 219 && copy_to_user(arg + sizeof(args), argbuf, argsize))
b095518e
JG		 220 rc = -EFAULT;
221error:
b095518e
JG		 222 if (argbuf)
223 kfree(argbuf);
224
225 return rc;
226}
227
228/**
229 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
8e8b77dd 230 * @scsidev: Device to which we are issuing command
b095518e
JG		 231 * @arg: User provided data for issuing command
232 *
233 * LOCKING:
234 * Defined by the SCSI layer. We don't really care.
235 *
236 * RETURNS:
237 * Zero on success, negative errno on error.
238 */
239int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
240{
241 int rc = 0;
242 u8 scsi_cmd[MAX_COMMAND_SIZE];
243 u8 args[7];
85837ebd 244 struct scsi_sense_hdr sshdr;
b095518e 245
c893a3ae 246 if (arg == NULL)
b095518e
JG		 247 return -EINVAL;
248
249 if (copy_from_user(args, arg, sizeof(args)))
250 return -EFAULT;
251
252 memset(scsi_cmd, 0, sizeof(scsi_cmd));
253 scsi_cmd[0] = ATA_16;
254 scsi_cmd[1] = (3 << 1); /* Non-data */
255 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
256 scsi_cmd[4] = args[1];
257 scsi_cmd[6] = args[2];
258 scsi_cmd[8] = args[3];
259 scsi_cmd[10] = args[4];
260 scsi_cmd[12] = args[5];
261 scsi_cmd[14] = args[0];
262
b095518e 263 /* Good values for timeout and retries? Values below
2e9edbf8 264 from scsi_ioctl_send_command() for default case... */
85837ebd
MC		 265 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
266 (10*HZ), 5))
b095518e 267 rc = -EIO;
b095518e
JG		 268
269 /* Need code to retrieve data from check condition? */
b095518e
JG		 270 return rc;
271}
272
1da177e4
LT		 273int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
274{
1da177e4
LT		 275 int val = -EINVAL, rc = -EINVAL;
276
1da177e4
LT		 277 switch (cmd) {
278 case ATA_IOC_GET_IO32:
279 val = 0;
280 if (copy_to_user(arg, &val, 1))
281 return -EFAULT;
282 return 0;
283
284 case ATA_IOC_SET_IO32:
285 val = (unsigned long) arg;
286 if (val != 0)
287 return -EINVAL;
288 return 0;
289
b095518e
JG		 290 case HDIO_DRIVE_CMD:
291 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
292 return -EACCES;
293 return ata_cmd_ioctl(scsidev, arg);
294
295 case HDIO_DRIVE_TASK:
296 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
297 return -EACCES;
298 return ata_task_ioctl(scsidev, arg);
299
1da177e4
LT		 300 default:
301 rc = -ENOTTY;
302 break;
303 }
304
1da177e4
LT		 305 return rc;
306}
307
308/**
309 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
1da177e4
LT		 310 * @dev: ATA device to which the new command is attached
311 * @cmd: SCSI command that originated this ATA command
312 * @done: SCSI command completion function
313 *
314 * Obtain a reference to an unused ata_queued_cmd structure,
315 * which is the basic libata structure representing a single
316 * ATA command sent to the hardware.
317 *
318 * If a command was available, fill in the SCSI-specific
319 * portions of the structure with information on the
320 * current command.
321 *
322 * LOCKING:
323 * spin_lock_irqsave(host_set lock)
324 *
325 * RETURNS:
326 * Command allocated, or %NULL if none available.
327 */
3373efd8 328struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
1da177e4
LT		 329 struct scsi_cmnd *cmd,
330 void (*done)(struct scsi_cmnd *))
331{
332 struct ata_queued_cmd *qc;
333
3373efd8 334 qc = ata_qc_new_init(dev);
1da177e4
LT		 335 if (qc) {
336 qc->scsicmd = cmd;
337 qc->scsidone = done;
338
339 if (cmd->use_sg) {
cedc9a47 340 qc->__sg = (struct scatterlist *) cmd->request_buffer;
1da177e4
LT		 341 qc->n_elem = cmd->use_sg;
342 } else {
cedc9a47 343 qc->__sg = &qc->sgent;
1da177e4
LT		 344 qc->n_elem = 1;
345 }
346 } else {
347 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
348 done(cmd);
349 }
350
351 return qc;
352}
353
b095518e
JG		 354/**
355 * ata_dump_status - user friendly display of error info
356 * @id: id of the port in question
357 * @tf: ptr to filled out taskfile
358 *
359 * Decode and dump the ATA error/status registers for the user so
360 * that they have some idea what really happened at the non
361 * make-believe layer.
362 *
363 * LOCKING:
364 * inherited from caller
365 */
366void ata_dump_status(unsigned id, struct ata_taskfile *tf)
367{
368 u8 stat = tf->command, err = tf->feature;
369
370 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
371 if (stat & ATA_BUSY) {
372 printk("Busy }\n"); /* Data is not valid in this case */
373 } else {
374 if (stat & 0x40) printk("DriveReady ");
375 if (stat & 0x20) printk("DeviceFault ");
376 if (stat & 0x10) printk("SeekComplete ");
377 if (stat & 0x08) printk("DataRequest ");
378 if (stat & 0x04) printk("CorrectedError ");
379 if (stat & 0x02) printk("Index ");
380 if (stat & 0x01) printk("Error ");
381 printk("}\n");
382
383 if (err) {
384 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
385 if (err & 0x04) printk("DriveStatusError ");
386 if (err & 0x80) {
387 if (err & 0x04) printk("BadCRC ");
388 else printk("Sector ");
389 }
390 if (err & 0x40) printk("UncorrectableError ");
391 if (err & 0x10) printk("SectorIdNotFound ");
392 if (err & 0x02) printk("TrackZeroNotFound ");
393 if (err & 0x01) printk("AddrMarkNotFound ");
394 printk("}\n");
395 }
396 }
397}
398
9b847548
JA		 399int ata_scsi_device_resume(struct scsi_device *sdev)
400{
35bb94b1 401 struct ata_port *ap = ata_shost_to_port(sdev->host);
31534363 402 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
9b847548 403
3373efd8 404 return ata_device_resume(dev);
9b847548
JA		 405}
406
082776e4 407int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
9b847548 408{
35bb94b1 409 struct ata_port *ap = ata_shost_to_port(sdev->host);
31534363 410 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
9b847548 411
3373efd8 412 return ata_device_suspend(dev, state);
9b847548
JA		 413}
414
1da177e4
LT		 415/**
416 * ata_to_sense_error - convert ATA error to SCSI error
8e8b77dd 417 * @id: ATA device number
1da177e4 418 * @drv_stat: value contained in ATA status register
b095518e
JG		 419 * @drv_err: value contained in ATA error register
420 * @sk: the sense key we'll fill out
421 * @asc: the additional sense code we'll fill out
422 * @ascq: the additional sense code qualifier we'll fill out
246619da 423 * @verbose: be verbose
1da177e4 424 *
b095518e
JG		 425 * Converts an ATA error into a SCSI error. Fill out pointers to
426 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
427 * format sense blocks.
1da177e4
LT		 428 *
429 * LOCKING:
430 * spin_lock_irqsave(host_set lock)
431 */
2e9edbf8 432void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
246619da 433 u8 *ascq, int verbose)
1da177e4 434{
b095518e 435 int i;
ffe75ef6 436
1da177e4 437 /* Based on the 3ware driver translation table */
98ac62de 438 static const unsigned char sense_table[][4] = {
1da177e4
LT		 439 /* BBD|ECC|ID|MAR */
440 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
441 /* BBD|ECC|ID */
442 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
443 /* ECC|MC|MARK */
444 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
445 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
446 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
447 /* MC|ID|ABRT|TRK0|MARK */
448 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
449 /* MCR|MARK */
450 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
451 /* Bad address mark */
452 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
453 /* TRK0 */
454 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
455 /* Abort & !ICRC */
456 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
457 /* Media change request */
458 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
459 /* SRV */
460 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
461 /* Media change */
462 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
463 /* ECC */
464 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
465 /* BBD - block marked bad */
466 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
467 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
468 };
98ac62de 469 static const unsigned char stat_table[][4] = {
1da177e4
LT		 470 /* Must be first because BUSY means no other bits valid */
471 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
472 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
473 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
474 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
475 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
476 };
1da177e4 477
1da177e4
LT		 478 /*
479 * Is this an error we can process/parse
480 */
b095518e
JG		 481 if (drv_stat & ATA_BUSY) {
482 drv_err = 0; /* Ignore the err bits, they're invalid */
1da177e4 483 }
b095518e
JG		 484
485 if (drv_err) {
486 /* Look for drv_err */
487 for (i = 0; sense_table[i][0] != 0xFF; i++) {
488 /* Look for best matches first */
2e9edbf8 489 if ((sense_table[i][0] & drv_err) ==
b095518e
JG		 490 sense_table[i][0]) {
491 *sk = sense_table[i][1];
492 *asc = sense_table[i][2];
493 *ascq = sense_table[i][3];
494 goto translate_done;
495 }
496 }
497 /* No immediate match */
246619da
TH		 498 if (verbose)
499 printk(KERN_WARNING "ata%u: no sense translation for "
500 "error 0x%02x\n", id, drv_err);
1da177e4 501 }
b095518e
JG		 502
503 /* Fall back to interpreting status bits */
504 for (i = 0; stat_table[i][0] != 0xFF; i++) {
505 if (stat_table[i][0] & drv_stat) {
506 *sk = stat_table[i][1];
507 *asc = stat_table[i][2];
508 *ascq = stat_table[i][3];
509 goto translate_done;
1da177e4 510 }
b095518e
JG		 511 }
512 /* No error? Undecoded? */
246619da
TH		 513 if (verbose)
514 printk(KERN_WARNING "ata%u: no sense translation for "
515 "status: 0x%02x\n", id, drv_stat);
b095518e 516
2d202024
AC		 517 /* We need a sensible error return here, which is tricky, and one
518 that won't cause people to do things like return a disk wrongly */
519 *sk = ABORTED_COMMAND;
520 *asc = 0x00;
521 *ascq = 0x00;
b095518e
JG		 522
523 translate_done:
246619da
TH		 524 if (verbose)
525 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
526 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
527 id, drv_stat, drv_err, *sk, *asc, *ascq);
b095518e
JG		 528 return;
529}
530
531/*
532 * ata_gen_ata_desc_sense - Generate check condition sense block.
533 * @qc: Command that completed.
534 *
535 * This function is specific to the ATA descriptor format sense
536 * block specified for the ATA pass through commands. Regardless
537 * of whether the command errored or not, return a sense
538 * block. Copy all controller registers into the sense
539 * block. Clear sense key, ASC & ASCQ if there is no error.
540 *
541 * LOCKING:
542 * spin_lock_irqsave(host_set lock)
543 */
544void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
545{
546 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 547 struct ata_taskfile *tf = &qc->result_tf;
b095518e
JG		 548 unsigned char *sb = cmd->sense_buffer;
549 unsigned char *desc = sb + 8;
246619da 550 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 551
552 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
553
0e5dec47 554 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 555
b095518e
JG		 556 /*
557 * Use ata_to_sense_error() to map status register bits
558 * onto sense key, asc & ascq.
559 */
058e55e1
TH		 560 if (qc->err_mask ||
561 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 562 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 563 &sb[1], &sb[2], &sb[3], verbose);
b095518e 564 sb[1] &= 0x0f;
1da177e4
LT		 565 }
566
b095518e
JG		 567 /*
568 * Sense data is current and format is descriptor.
569 */
570 sb[0] = 0x72;
1da177e4 571
b095518e
JG		 572 desc[0] = 0x09;
573
574 /*
575 * Set length of additional sense data.
576 * Since we only populate descriptor 0, the total
577 * length is the same (fixed) length as descriptor 0.
578 */
579 desc[1] = sb[7] = 14;
580
581 /*
582 * Copy registers into sense buffer.
583 */
584 desc[2] = 0x00;
585 desc[3] = tf->feature; /* == error reg */
586 desc[5] = tf->nsect;
587 desc[7] = tf->lbal;
588 desc[9] = tf->lbam;
589 desc[11] = tf->lbah;
590 desc[12] = tf->device;
591 desc[13] = tf->command; /* == status reg */
592
593 /*
594 * Fill in Extend bit, and the high order bytes
595 * if applicable.
596 */
597 if (tf->flags & ATA_TFLAG_LBA48) {
598 desc[2] |= 0x01;
599 desc[4] = tf->hob_nsect;
600 desc[6] = tf->hob_lbal;
601 desc[8] = tf->hob_lbam;
602 desc[10] = tf->hob_lbah;
1da177e4 603 }
b095518e 604}
1da177e4 605
b095518e
JG		 606/**
607 * ata_gen_fixed_sense - generate a SCSI fixed sense block
608 * @qc: Command that we are erroring out
609 *
610 * Leverage ata_to_sense_error() to give us the codes. Fit our
611 * LBA in here if there's room.
612 *
613 * LOCKING:
614 * inherited from caller
615 */
616void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
617{
618 struct scsi_cmnd *cmd = qc->scsicmd;
e61e0672 619 struct ata_taskfile *tf = &qc->result_tf;
b095518e 620 unsigned char *sb = cmd->sense_buffer;
246619da 621 int verbose = qc->ap->ops->error_handler == NULL;
b095518e
JG		 622
623 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
624
0e5dec47 625 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
b095518e 626
b095518e
JG		 627 /*
628 * Use ata_to_sense_error() to map status register bits
629 * onto sense key, asc & ascq.
630 */
058e55e1
TH		 631 if (qc->err_mask ||
632 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
b095518e 633 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
246619da 634 &sb[2], &sb[12], &sb[13], verbose);
b095518e 635 sb[2] &= 0x0f;
1da177e4 636 }
1da177e4
LT		 637
638 sb[0] = 0x70;
b095518e 639 sb[7] = 0x0a;
0274aa25 640
a7dac447
JG		 641 if (tf->flags & ATA_TFLAG_LBA48) {
642 /* TODO: find solution for LBA48 descriptors */
643 }
644
645 else if (tf->flags & ATA_TFLAG_LBA) {
b095518e
JG		 646 /* A small (28b) LBA will fit in the 32b info field */
647 sb[0] |= 0x80; /* set valid bit */
648 sb[3] = tf->device & 0x0f;
649 sb[4] = tf->lbah;
650 sb[5] = tf->lbam;
651 sb[6] = tf->lbal;
1da177e4 652 }
a7dac447
JG		 653
654 else {
655 /* TODO: C/H/S */
656 }
1da177e4
LT		 657}
658
a6cce2a7
BK		 659static void ata_scsi_sdev_config(struct scsi_device *sdev)
660{
661 sdev->use_10_for_rw = 1;
662 sdev->use_10_for_ms = 1;
663}
664
665static void ata_scsi_dev_config(struct scsi_device *sdev,
666 struct ata_device *dev)
667{
668 unsigned int max_sectors;
669
670 /* TODO: 2048 is an arbitrary number, not the
671 * hardware maximum. This should be increased to
672 * 65534 when Jens Axboe's patch for dynamically
673 * determining max_sectors is merged.
674 */
675 max_sectors = ATA_MAX_SECTORS;
676 if (dev->flags & ATA_DFLAG_LBA48)
200d5a76 677 max_sectors = ATA_MAX_SECTORS_LBA48;
a6cce2a7
BK		 678 if (dev->max_sectors)
679 max_sectors = dev->max_sectors;
680
681 blk_queue_max_sectors(sdev->request_queue, max_sectors);
682
683 /*
684 * SATA DMA transfers must be multiples of 4 byte, so
685 * we need to pad ATAPI transfers using an extra sg.
686 * Decrement max hw segments accordingly.
687 */
688 if (dev->class == ATA_DEV_ATAPI) {
689 request_queue_t *q = sdev->request_queue;
690 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
691 }
a6e6ce8e
TH		 692
693 if (dev->flags & ATA_DFLAG_NCQ) {
694 int depth;
695
696 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
697 depth = min(ATA_MAX_QUEUE - 1, depth);
698 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
699 }
a6cce2a7
BK		 700}
701
1da177e4
LT		 702/**
703 * ata_scsi_slave_config - Set SCSI device attributes
704 * @sdev: SCSI device to examine
705 *
706 * This is called before we actually start reading
707 * and writing to the device, to configure certain
708 * SCSI mid-layer behaviors.
709 *
710 * LOCKING:
711 * Defined by SCSI layer. We don't really care.
712 */
713
714int ata_scsi_slave_config(struct scsi_device *sdev)
715{
31534363
TH		 716 struct ata_port *ap = ata_shost_to_port(sdev->host);
717 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
718
a6cce2a7 719 ata_scsi_sdev_config(sdev);
1da177e4
LT		 720
721 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
722
31534363 723 if (dev)
a6cce2a7 724 ata_scsi_dev_config(sdev, dev);
1da177e4
LT		 725
726 return 0; /* scsi layer doesn't check return value, sigh */
727}
728
a6e6ce8e
TH		 729/**
730 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
731 * @sdev: SCSI device to configure queue depth for
732 * @queue_depth: new queue depth
733 *
734 * This is libata standard hostt->change_queue_depth callback.
735 * SCSI will call into this callback when user tries to set queue
736 * depth via sysfs.
737 *
738 * LOCKING:
739 * SCSI layer (we don't care)
740 *
741 * RETURNS:
742 * Newly configured queue depth.
743 */
744int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
745{
746 struct ata_port *ap = ata_shost_to_port(sdev->host);
747 struct ata_device *dev;
748 int max_depth;
749
750 if (queue_depth < 1)
751 return sdev->queue_depth;
752
753 dev = ata_scsi_find_dev(ap, sdev);
754 if (!dev || !ata_dev_enabled(dev))
755 return sdev->queue_depth;
756
757 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
758 max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
759 if (queue_depth > max_depth)
760 queue_depth = max_depth;
761
762 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
763 return queue_depth;
764}
765
972dcafb
DG		 766/**
767 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
768 * @qc: Storage for translated ATA taskfile
769 * @scsicmd: SCSI command to translate
770 *
771 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
772 * (to start). Perhaps these commands should be preceded by
773 * CHECK POWER MODE to see what power mode the device is already in.
774 * [See SAT revision 5 at www.t10.org]
775 *
776 * LOCKING:
777 * spin_lock_irqsave(host_set lock)
778 *
779 * RETURNS:
780 * Zero on success, non-zero on error.
781 */
782
783static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
057ace5e 784 const u8 *scsicmd)
972dcafb
DG		 785{
786 struct ata_taskfile *tf = &qc->tf;
787
788 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
789 tf->protocol = ATA_PROT_NODATA;
790 if (scsicmd[1] & 0x1) {
791 ; /* ignore IMMED bit, violates sat-r05 */
792 }
793 if (scsicmd[4] & 0x2)
ae006510 794 goto invalid_fld; /* LOEJ bit set not supported */
972dcafb 795 if (((scsicmd[4] >> 4) & 0xf) != 0)
ae006510 796 goto invalid_fld; /* power conditions not supported */
972dcafb
DG		 797 if (scsicmd[4] & 0x1) {
798 tf->nsect = 1; /* 1 sector, lba=0 */
9d5b1302
AL		 799
800 if (qc->dev->flags & ATA_DFLAG_LBA) {
c44078c0 801 tf->flags |= ATA_TFLAG_LBA;
9d5b1302
AL		 802
803 tf->lbah = 0x0;
804 tf->lbam = 0x0;
805 tf->lbal = 0x0;
806 tf->device |= ATA_LBA;
807 } else {
808 /* CHS */
809 tf->lbal = 0x1; /* sect */
810 tf->lbam = 0x0; /* cyl low */
811 tf->lbah = 0x0; /* cyl high */
812 }
813
972dcafb
DG		 814 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
815 } else {
816 tf->nsect = 0; /* time period value (0 implies now) */
817 tf->command = ATA_CMD_STANDBY;
818 /* Consider: ATA STANDBY IMMEDIATE command */
819 }
820 /*
821 * Standby and Idle condition timers could be implemented but that
822 * would require libata to implement the Power condition mode page
823 * and allow the user to change it. Changing mode pages requires
824 * MODE SELECT to be implemented.
825 */
826
827 return 0;
ae006510
DG		 828
829invalid_fld:
830 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
831 /* "Invalid field in cbd" */
832 return 1;
972dcafb
DG		 833}
834
835
1da177e4
LT		 836/**
837 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
838 * @qc: Storage for translated ATA taskfile
839 * @scsicmd: SCSI command to translate (ignored)
840 *
841 * Sets up an ATA taskfile to issue FLUSH CACHE or
842 * FLUSH CACHE EXT.
843 *
844 * LOCKING:
845 * spin_lock_irqsave(host_set lock)
846 *
847 * RETURNS:
848 * Zero on success, non-zero on error.
849 */
850
057ace5e 851static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 852{
853 struct ata_taskfile *tf = &qc->tf;
854
855 tf->flags |= ATA_TFLAG_DEVICE;
856 tf->protocol = ATA_PROT_NODATA;
857
07506697 858 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
1da177e4
LT		 859 (ata_id_has_flush_ext(qc->dev->id)))
860 tf->command = ATA_CMD_FLUSH_EXT;
861 else
862 tf->command = ATA_CMD_FLUSH;
863
864 return 0;
865}
866
3aef5231
AL		 867/**
868 * scsi_6_lba_len - Get LBA and transfer length
869 * @scsicmd: SCSI command to translate
870 *
871 * Calculate LBA and transfer length for 6-byte commands.
872 *
873 * RETURNS:
874 * @plba: the LBA
875 * @plen: the transfer length
876 */
877
057ace5e 878static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 879{
880 u64 lba = 0;
881 u32 len = 0;
882
883 VPRINTK("six-byte command\n");
884
885 lba |= ((u64)scsicmd[2]) << 8;
886 lba |= ((u64)scsicmd[3]);
887
888 len |= ((u32)scsicmd[4]);
889
890 *plba = lba;
891 *plen = len;
892}
893
894/**
895 * scsi_10_lba_len - Get LBA and transfer length
896 * @scsicmd: SCSI command to translate
897 *
898 * Calculate LBA and transfer length for 10-byte commands.
899 *
900 * RETURNS:
901 * @plba: the LBA
902 * @plen: the transfer length
903 */
904
057ace5e 905static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 906{
907 u64 lba = 0;
908 u32 len = 0;
909
910 VPRINTK("ten-byte command\n");
911
912 lba |= ((u64)scsicmd[2]) << 24;
913 lba |= ((u64)scsicmd[3]) << 16;
914 lba |= ((u64)scsicmd[4]) << 8;
915 lba |= ((u64)scsicmd[5]);
916
917 len |= ((u32)scsicmd[7]) << 8;
918 len |= ((u32)scsicmd[8]);
919
920 *plba = lba;
921 *plen = len;
922}
923
924/**
925 * scsi_16_lba_len - Get LBA and transfer length
926 * @scsicmd: SCSI command to translate
927 *
928 * Calculate LBA and transfer length for 16-byte commands.
929 *
930 * RETURNS:
931 * @plba: the LBA
932 * @plen: the transfer length
933 */
934
057ace5e 935static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
3aef5231
AL		 936{
937 u64 lba = 0;
938 u32 len = 0;
939
940 VPRINTK("sixteen-byte command\n");
941
942 lba |= ((u64)scsicmd[2]) << 56;
943 lba |= ((u64)scsicmd[3]) << 48;
944 lba |= ((u64)scsicmd[4]) << 40;
945 lba |= ((u64)scsicmd[5]) << 32;
946 lba |= ((u64)scsicmd[6]) << 24;
947 lba |= ((u64)scsicmd[7]) << 16;
948 lba |= ((u64)scsicmd[8]) << 8;
949 lba |= ((u64)scsicmd[9]);
950
951 len |= ((u32)scsicmd[10]) << 24;
952 len |= ((u32)scsicmd[11]) << 16;
953 len |= ((u32)scsicmd[12]) << 8;
954 len |= ((u32)scsicmd[13]);
955
956 *plba = lba;
957 *plen = len;
958}
959
1da177e4
LT		 960/**
961 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
962 * @qc: Storage for translated ATA taskfile
963 * @scsicmd: SCSI command to translate
964 *
965 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
966 *
967 * LOCKING:
968 * spin_lock_irqsave(host_set lock)
969 *
970 * RETURNS:
971 * Zero on success, non-zero on error.
972 */
973
057ace5e 974static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 975{
976 struct ata_taskfile *tf = &qc->tf;
8bf62ece 977 struct ata_device *dev = qc->dev;
1da177e4 978 u64 dev_sectors = qc->dev->n_sectors;
3aef5231
AL		 979 u64 block;
980 u32 n_block;
1da177e4
LT		 981
982 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
983 tf->protocol = ATA_PROT_NODATA;
1da177e4 984
3aef5231
AL		 985 if (scsicmd[0] == VERIFY)
986 scsi_10_lba_len(scsicmd, &block, &n_block);
987 else if (scsicmd[0] == VERIFY_16)
988 scsi_16_lba_len(scsicmd, &block, &n_block);
1da177e4 989 else
ae006510 990 goto invalid_fld;
1da177e4 991
8bf62ece 992 if (!n_block)
ae006510 993 goto nothing_to_do;
8bf62ece 994 if (block >= dev_sectors)
ae006510 995 goto out_of_range;
8bf62ece 996 if ((block + n_block) > dev_sectors)
ae006510 997 goto out_of_range;
1da177e4 998
07506697
AL		 999 if (dev->flags & ATA_DFLAG_LBA) {
1000 tf->flags |= ATA_TFLAG_LBA;
1001
c6a33e24
AL		 1002 if (lba_28_ok(block, n_block)) {
1003 /* use LBA28 */
1004 tf->command = ATA_CMD_VERIFY;
1005 tf->device |= (block >> 24) & 0xf;
1006 } else if (lba_48_ok(block, n_block)) {
1007 if (!(dev->flags & ATA_DFLAG_LBA48))
1008 goto out_of_range;
07506697
AL		 1009
1010 /* use LBA48 */
1011 tf->flags |= ATA_TFLAG_LBA48;
8bf62ece 1012 tf->command = ATA_CMD_VERIFY_EXT;
1da177e4 1013
8bf62ece 1014 tf->hob_nsect = (n_block >> 8) & 0xff;
1da177e4 1015
8bf62ece
AL		 1016 tf->hob_lbah = (block >> 40) & 0xff;
1017 tf->hob_lbam = (block >> 32) & 0xff;
1018 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1019 } else
1020 /* request too large even for LBA48 */
1021 goto out_of_range;
8bf62ece
AL		 1022
1023 tf->nsect = n_block & 0xff;
1da177e4 1024
8bf62ece
AL		 1025 tf->lbah = (block >> 16) & 0xff;
1026 tf->lbam = (block >> 8) & 0xff;
1027 tf->lbal = block & 0xff;
1da177e4 1028
8bf62ece
AL		 1029 tf->device |= ATA_LBA;
1030 } else {
1031 /* CHS */
1032 u32 sect, head, cyl, track;
1033
c6a33e24
AL		 1034 if (!lba_28_ok(block, n_block))
1035 goto out_of_range;
07506697 1036
8bf62ece
AL		 1037 /* Convert LBA to CHS */
1038 track = (u32)block / dev->sectors;
1039 cyl = track / dev->heads;
1040 head = track % dev->heads;
1041 sect = (u32)block % dev->sectors + 1;
1042
c187c4b5
AL		 1043 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1044 (u32)block, track, cyl, head, sect);
2e9edbf8
JG		 1045
1046 /* Check whether the converted CHS can fit.
1047 Cylinder: 0-65535
8bf62ece
AL		 1048 Head: 0-15
1049 Sector: 1-255*/
2e9edbf8 1050 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1051 goto out_of_range;
2e9edbf8 1052
8bf62ece
AL		 1053 tf->command = ATA_CMD_VERIFY;
1054 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1055 tf->lbal = sect;
1056 tf->lbam = cyl;
1057 tf->lbah = cyl >> 8;
1058 tf->device |= head;
1059 }
1da177e4
LT		 1060
1061 return 0;
ae006510
DG		 1062
1063invalid_fld:
1064 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1065 /* "Invalid field in cbd" */
1066 return 1;
1067
1068out_of_range:
1069 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1070 /* "Logical Block Address out of range" */
1071 return 1;
1072
1073nothing_to_do:
1074 qc->scsicmd->result = SAM_STAT_GOOD;
1075 return 1;
1da177e4
LT		 1076}
1077
1078/**
1079 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1080 * @qc: Storage for translated ATA taskfile
1081 * @scsicmd: SCSI command to translate
1082 *
1083 * Converts any of six SCSI read/write commands into the
1084 * ATA counterpart, including starting sector (LBA),
1085 * sector count, and taking into account the device's LBA48
1086 * support.
1087 *
1088 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1089 * %WRITE_16 are currently supported.
1090 *
1091 * LOCKING:
1092 * spin_lock_irqsave(host_set lock)
1093 *
1094 * RETURNS:
1095 * Zero on success, non-zero on error.
1096 */
1097
057ace5e 1098static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 1099{
1100 struct ata_taskfile *tf = &qc->tf;
8bf62ece 1101 struct ata_device *dev = qc->dev;
3aef5231
AL		 1102 u64 block;
1103 u32 n_block;
1da177e4 1104
27197367 1105 qc->flags |= ATA_QCFLAG_IO;
1da177e4 1106 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1da177e4 1107
8cbd6df1
AL		 1108 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1109 scsicmd[0] == WRITE_16)
1da177e4 1110 tf->flags |= ATA_TFLAG_WRITE;
1da177e4 1111
9a3dccc4 1112 /* Calculate the SCSI LBA, transfer length and FUA. */
3aef5231
AL		 1113 switch (scsicmd[0]) {
1114 case READ_10:
1115 case WRITE_10:
1116 scsi_10_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1117 if (unlikely(scsicmd[1] & (1 << 3)))
1118 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1119 break;
1120 case READ_6:
1121 case WRITE_6:
1122 scsi_6_lba_len(scsicmd, &block, &n_block);
c187c4b5
AL		 1123
1124 /* for 6-byte r/w commands, transfer length 0
1125 * means 256 blocks of data, not 0 block.
1126 */
76b2bf9b
JG		 1127 if (!n_block)
1128 n_block = 256;
3aef5231
AL		 1129 break;
1130 case READ_16:
1131 case WRITE_16:
1132 scsi_16_lba_len(scsicmd, &block, &n_block);
9a3dccc4
TH		 1133 if (unlikely(scsicmd[1] & (1 << 3)))
1134 tf->flags |= ATA_TFLAG_FUA;
3aef5231
AL		 1135 break;
1136 default:
8bf62ece 1137 DPRINTK("no-byte command\n");
ae006510 1138 goto invalid_fld;
1da177e4
LT		 1139 }
1140
8bf62ece
AL		 1141 /* Check and compose ATA command */
1142 if (!n_block)
c187c4b5
AL		 1143 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1144 * length 0 means transfer 0 block of data.
1145 * However, for ATA R/W commands, sector count 0 means
1146 * 256 or 65536 sectors, not 0 sectors as in SCSI.
f51750d5
AC		 1147 *
1148 * WARNING: one or two older ATA drives treat 0 as 0...
c187c4b5 1149 */
ae006510 1150 goto nothing_to_do;
1da177e4 1151
3dc1d881
TH		 1152 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
1153 /* yay, NCQ */
1154 if (!lba_48_ok(block, n_block))
1155 goto out_of_range;
1156
1157 tf->protocol = ATA_PROT_NCQ;
1158 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1159
1160 if (tf->flags & ATA_TFLAG_WRITE)
1161 tf->command = ATA_CMD_FPDMA_WRITE;
1162 else
1163 tf->command = ATA_CMD_FPDMA_READ;
1164
1165 qc->nsect = n_block;
1166
1167 tf->nsect = qc->tag << 3;
1168 tf->hob_feature = (n_block >> 8) & 0xff;
1169 tf->feature = n_block & 0xff;
1170
1171 tf->hob_lbah = (block >> 40) & 0xff;
1172 tf->hob_lbam = (block >> 32) & 0xff;
1173 tf->hob_lbal = (block >> 24) & 0xff;
1174 tf->lbah = (block >> 16) & 0xff;
1175 tf->lbam = (block >> 8) & 0xff;
1176 tf->lbal = block & 0xff;
1177
1178 tf->device = 1 << 6;
1179 if (tf->flags & ATA_TFLAG_FUA)
1180 tf->device |= 1 << 7;
1181 } else if (dev->flags & ATA_DFLAG_LBA) {
07506697
AL		 1182 tf->flags |= ATA_TFLAG_LBA;
1183
c6a33e24
AL		 1184 if (lba_28_ok(block, n_block)) {
1185 /* use LBA28 */
1186 tf->device |= (block >> 24) & 0xf;
1187 } else if (lba_48_ok(block, n_block)) {
1188 if (!(dev->flags & ATA_DFLAG_LBA48))
ae006510 1189 goto out_of_range;
1da177e4 1190
07506697
AL		 1191 /* use LBA48 */
1192 tf->flags |= ATA_TFLAG_LBA48;
1193
8bf62ece
AL		 1194 tf->hob_nsect = (n_block >> 8) & 0xff;
1195
1196 tf->hob_lbah = (block >> 40) & 0xff;
1197 tf->hob_lbam = (block >> 32) & 0xff;
1198 tf->hob_lbal = (block >> 24) & 0xff;
c6a33e24
AL		 1199 } else
1200 /* request too large even for LBA48 */
1201 goto out_of_range;
c187c4b5 1202
9a3dccc4
TH		 1203 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1204 goto invalid_fld;
8cbd6df1 1205
8bf62ece
AL		 1206 qc->nsect = n_block;
1207 tf->nsect = n_block & 0xff;
1da177e4 1208
8bf62ece
AL		 1209 tf->lbah = (block >> 16) & 0xff;
1210 tf->lbam = (block >> 8) & 0xff;
1211 tf->lbal = block & 0xff;
1da177e4 1212
8bf62ece 1213 tf->device |= ATA_LBA;
2e9edbf8 1214 } else {
8bf62ece
AL		 1215 /* CHS */
1216 u32 sect, head, cyl, track;
1217
1218 /* The request -may- be too large for CHS addressing. */
c6a33e24 1219 if (!lba_28_ok(block, n_block))
ae006510 1220 goto out_of_range;
c187c4b5 1221
9a3dccc4
TH		 1222 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1223 goto invalid_fld;
8cbd6df1 1224
8bf62ece
AL		 1225 /* Convert LBA to CHS */
1226 track = (u32)block / dev->sectors;
1227 cyl = track / dev->heads;
1228 head = track % dev->heads;
1229 sect = (u32)block % dev->sectors + 1;
1230
c187c4b5 1231 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
8bf62ece 1232 (u32)block, track, cyl, head, sect);
c187c4b5 1233
2e9edbf8
JG		 1234 /* Check whether the converted CHS can fit.
1235 Cylinder: 0-65535
8bf62ece
AL		 1236 Head: 0-15
1237 Sector: 1-255*/
c187c4b5 1238 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
ae006510 1239 goto out_of_range;
c187c4b5 1240
8bf62ece
AL		 1241 qc->nsect = n_block;
1242 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1243 tf->lbal = sect;
1244 tf->lbam = cyl;
1245 tf->lbah = cyl >> 8;
1246 tf->device |= head;
1da177e4
LT		 1247 }
1248
8bf62ece 1249 return 0;
ae006510
DG		 1250
1251invalid_fld:
1252 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1253 /* "Invalid field in cbd" */
1254 return 1;
1255
1256out_of_range:
1257 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1258 /* "Logical Block Address out of range" */
1259 return 1;
1260
1261nothing_to_do:
1262 qc->scsicmd->result = SAM_STAT_GOOD;
1263 return 1;
1da177e4
LT		 1264}
1265
77853bf2 1266static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 1267{
1268 struct scsi_cmnd *cmd = qc->scsicmd;
a7dac447 1269 u8 *cdb = cmd->cmnd;
a22e2eb0 1270 int need_sense = (qc->err_mask != 0);
b095518e
JG		 1271
1272 /* For ATA pass thru (SAT) commands, generate a sense block if
1273 * user mandated it or if there's an error. Note that if we
1274 * generate because the user forced us to, a check condition
1275 * is generated and the ATA register values are returned
1276 * whether the command completed successfully or not. If there
1277 * was no error, SK, ASC and ASCQ will all be zero.
1278 */
a7dac447
JG		 1279 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1280 ((cdb[2] & 0x20) || need_sense)) {
b095518e
JG		 1281 ata_gen_ata_desc_sense(qc);
1282 } else {
1283 if (!need_sense) {
1284 cmd->result = SAM_STAT_GOOD;
1285 } else {
1286 /* TODO: decide which descriptor format to use
1287 * for 48b LBA devices and call that here
1288 * instead of the fixed desc, which is only
1289 * good for smaller LBA (and maybe CHS?)
1290 * devices.
1291 */
1292 ata_gen_fixed_sense(qc);
1293 }
1294 }
1da177e4 1295
246619da 1296 if (need_sense && !qc->ap->ops->error_handler)
e61e0672 1297 ata_dump_status(qc->ap->id, &qc->result_tf);
1da177e4
LT		 1298
1299 qc->scsidone(cmd);
1300
77853bf2 1301 ata_qc_free(qc);
1da177e4
LT		 1302}
1303
3dc1d881
TH		 1304/**
1305 * ata_scmd_need_defer - Check whether we need to defer scmd
1306 * @dev: ATA device to which the command is addressed
1307 * @is_io: Is the command IO (and thus possibly NCQ)?
1308 *
1309 * NCQ and non-NCQ commands cannot run together. As upper layer
1310 * only knows the queue depth, we are responsible for maintaining
1311 * exclusion. This function checks whether a new command can be
1312 * issued to @dev.
1313 *
1314 * LOCKING:
1315 * spin_lock_irqsave(host_set lock)
1316 *
1317 * RETURNS:
1318 * 1 if deferring is needed, 0 otherwise.
1319 */
1320static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1321{
1322 struct ata_port *ap = dev->ap;
1323
1324 if (!(dev->flags & ATA_DFLAG_NCQ))
1325 return 0;
1326
1327 if (is_io) {
1328 if (!ata_tag_valid(ap->active_tag))
1329 return 0;
1330 } else {
1331 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1332 return 0;
1333 }
1334 return 1;
1335}
1336
1da177e4
LT		 1337/**
1338 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1da177e4
LT		 1339 * @dev: ATA device to which the command is addressed
1340 * @cmd: SCSI command to execute
1341 * @done: SCSI command completion function
1342 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1343 *
1344 * Our ->queuecommand() function has decided that the SCSI
1345 * command issued can be directly translated into an ATA
1346 * command, rather than handled internally.
1347 *
1348 * This function sets up an ata_queued_cmd structure for the
1349 * SCSI command, and sends that ata_queued_cmd to the hardware.
1350 *
ae006510
DG		 1351 * The xlat_func argument (actor) returns 0 if ready to execute
1352 * ATA command, else 1 to finish translation. If 1 is returned
1353 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1354 * to be set reflecting an error condition or clean (early)
1355 * termination.
1356 *
1da177e4
LT		 1357 * LOCKING:
1358 * spin_lock_irqsave(host_set lock)
2115ea94
TH		 1359 *
1360 * RETURNS:
1361 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1362 * needs to be deferred.
1da177e4 1363 */
2115ea94
TH		 1364static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1365 void (*done)(struct scsi_cmnd *),
1366 ata_xlat_func_t xlat_func)
1da177e4
LT		 1367{
1368 struct ata_queued_cmd *qc;
1369 u8 *scsicmd = cmd->cmnd;
3dc1d881 1370 int is_io = xlat_func == ata_scsi_rw_xlat;
1da177e4
LT		 1371
1372 VPRINTK("ENTER\n");
1373
3dc1d881
TH		 1374 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1375 goto defer;
1376
3373efd8 1377 qc = ata_scsi_qc_new(dev, cmd, done);
1da177e4 1378 if (!qc)
ae006510 1379 goto err_mem;
1da177e4
LT		 1380
1381 /* data is present; dma-map it */
be7db055
CH		 1382 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1383 cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4 1384 if (unlikely(cmd->request_bufflen < 1)) {
f15a1daf
TH		 1385 ata_dev_printk(dev, KERN_WARNING,
1386 "WARNING: zero len r/w req\n");
ae006510 1387 goto err_did;
1da177e4
LT		 1388 }
1389
1390 if (cmd->use_sg)
1391 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1392 else
1393 ata_sg_init_one(qc, cmd->request_buffer,
1394 cmd->request_bufflen);
1395
1396 qc->dma_dir = cmd->sc_data_direction;
1397 }
1398
1399 qc->complete_fn = ata_scsi_qc_complete;
1400
1401 if (xlat_func(qc, scsicmd))
ae006510 1402 goto early_finish;
1da177e4
LT		 1403
1404 /* select device, send command to hardware */
8e0e694a 1405 ata_qc_issue(qc);
1da177e4
LT		 1406
1407 VPRINTK("EXIT\n");
2115ea94 1408 return 0;
1da177e4 1409
ae006510
DG		 1410early_finish:
1411 ata_qc_free(qc);
1412 done(cmd);
1413 DPRINTK("EXIT - early finish (good or error)\n");
2115ea94 1414 return 0;
ae006510
DG		 1415
1416err_did:
1da177e4 1417 ata_qc_free(qc);
ae006510
DG		 1418err_mem:
1419 cmd->result = (DID_ERROR << 16);
1420 done(cmd);
1421 DPRINTK("EXIT - internal\n");
2115ea94 1422 return 0;
3dc1d881
TH		 1423
1424defer:
1425 DPRINTK("EXIT - defer\n");
1426 return SCSI_MLQUEUE_DEVICE_BUSY;
1da177e4
LT		 1427}
1428
1429/**
1430 * ata_scsi_rbuf_get - Map response buffer.
1431 * @cmd: SCSI command containing buffer to be mapped.
1432 * @buf_out: Pointer to mapped area.
1433 *
1434 * Maps buffer contained within SCSI command @cmd.
1435 *
1436 * LOCKING:
1437 * spin_lock_irqsave(host_set lock)
1438 *
1439 * RETURNS:
1440 * Length of response buffer.
1441 */
1442
1443static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1444{
1445 u8 *buf;
1446 unsigned int buflen;
1447
1448 if (cmd->use_sg) {
1449 struct scatterlist *sg;
1450
1451 sg = (struct scatterlist *) cmd->request_buffer;
1452 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1453 buflen = sg->length;
1454 } else {
1455 buf = cmd->request_buffer;
1456 buflen = cmd->request_bufflen;
1457 }
1458
1459 *buf_out = buf;
1460 return buflen;
1461}
1462
1463/**
1464 * ata_scsi_rbuf_put - Unmap response buffer.
1465 * @cmd: SCSI command containing buffer to be unmapped.
1466 * @buf: buffer to unmap
1467 *
1468 * Unmaps response buffer contained within @cmd.
1469 *
1470 * LOCKING:
1471 * spin_lock_irqsave(host_set lock)
1472 */
1473
1474static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1475{
1476 if (cmd->use_sg) {
1477 struct scatterlist *sg;
1478
1479 sg = (struct scatterlist *) cmd->request_buffer;
1480 kunmap_atomic(buf - sg->offset, KM_USER0);
1481 }
1482}
1483
1484/**
1485 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1486 * @args: device IDENTIFY data / SCSI command of interest.
1487 * @actor: Callback hook for desired SCSI command simulator
1488 *
1489 * Takes care of the hard work of simulating a SCSI command...
1490 * Mapping the response buffer, calling the command's handler,
1491 * and handling the handler's return value. This return value
1492 * indicates whether the handler wishes the SCSI command to be
ae006510
DG		 1493 * completed successfully (0), or not (in which case cmd->result
1494 * and sense buffer are assumed to be set).
1da177e4
LT		 1495 *
1496 * LOCKING:
1497 * spin_lock_irqsave(host_set lock)
1498 */
1499
1500void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1501 unsigned int (*actor) (struct ata_scsi_args *args,
1502 u8 *rbuf, unsigned int buflen))
1503{
1504 u8 *rbuf;
1505 unsigned int buflen, rc;
1506 struct scsi_cmnd *cmd = args->cmd;
1507
1508 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1509 memset(rbuf, 0, buflen);
1510 rc = actor(args, rbuf, buflen);
1511 ata_scsi_rbuf_put(cmd, rbuf);
1512
ae006510 1513 if (rc == 0)
1da177e4 1514 cmd->result = SAM_STAT_GOOD;
ae006510 1515 args->done(cmd);
1da177e4
LT		 1516}
1517
1518/**
1519 * ata_scsiop_inq_std - Simulate INQUIRY command
1520 * @args: device IDENTIFY data / SCSI command of interest.
1521 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1522 * @buflen: Response buffer length.
1523 *
1524 * Returns standard device identification data associated
b142eb65 1525 * with non-VPD INQUIRY command output.
1da177e4
LT		 1526 *
1527 * LOCKING:
1528 * spin_lock_irqsave(host_set lock)
1529 */
1530
1531unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1532 unsigned int buflen)
1533{
1534 u8 hdr[] = {
1535 TYPE_DISK,
1536 0,
1537 0x5, /* claim SPC-3 version compatibility */
1538 2,
1539 95 - 4
1540 };
1541
1542 /* set scsi removeable (RMB) bit per ata bit */
1543 if (ata_id_removeable(args->id))
1544 hdr[1] |= (1 << 7);
1545
1546 VPRINTK("ENTER\n");
1547
1548 memcpy(rbuf, hdr, sizeof(hdr));
1549
1550 if (buflen > 35) {
1551 memcpy(&rbuf[8], "ATA ", 8);
6a62a04d
TH		 1552 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1553 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1da177e4
LT		 1554 if (rbuf[32] == 0 || rbuf[32] == ' ')
1555 memcpy(&rbuf[32], "n/a ", 4);
1556 }
1557
1558 if (buflen > 63) {
1559 const u8 versions[] = {
1560 0x60, /* SAM-3 (no version claimed) */
1561
1562 0x03,
1563 0x20, /* SBC-2 (no version claimed) */
1564
1565 0x02,
1566 0x60 /* SPC-3 (no version claimed) */
1567 };
1568
1569 memcpy(rbuf + 59, versions, sizeof(versions));
1570 }
1571
1572 return 0;
1573}
1574
1575/**
b142eb65 1576 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1da177e4
LT		 1577 * @args: device IDENTIFY data / SCSI command of interest.
1578 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1579 * @buflen: Response buffer length.
1580 *
b142eb65 1581 * Returns list of inquiry VPD pages available.
1da177e4
LT		 1582 *
1583 * LOCKING:
1584 * spin_lock_irqsave(host_set lock)
1585 */
1586
1587unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1588 unsigned int buflen)
1589{
1590 const u8 pages[] = {
1591 0x00, /* page 0x00, this page */
1592 0x80, /* page 0x80, unit serial no page */
1593 0x83 /* page 0x83, device ident page */
1594 };
b142eb65 1595 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1da177e4
LT		 1596
1597 if (buflen > 6)
1598 memcpy(rbuf + 4, pages, sizeof(pages));
1599
1600 return 0;
1601}
1602
1603/**
b142eb65 1604 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1da177e4
LT		 1605 * @args: device IDENTIFY data / SCSI command of interest.
1606 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1607 * @buflen: Response buffer length.
1608 *
1609 * Returns ATA device serial number.
1610 *
1611 * LOCKING:
1612 * spin_lock_irqsave(host_set lock)
1613 */
1614
1615unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1616 unsigned int buflen)
1617{
1618 const u8 hdr[] = {
1619 0,
1620 0x80, /* this page code */
1621 0,
1622 ATA_SERNO_LEN, /* page len */
1623 };
1624 memcpy(rbuf, hdr, sizeof(hdr));
1625
1626 if (buflen > (ATA_SERNO_LEN + 4 - 1))
6a62a04d
TH		 1627 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1628 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1da177e4
LT		 1629
1630 return 0;
1631}
1632
1da177e4 1633/**
b142eb65 1634 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1da177e4
LT		 1635 * @args: device IDENTIFY data / SCSI command of interest.
1636 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1637 * @buflen: Response buffer length.
1638 *
b142eb65
JG		 1639 * Yields two logical unit device identification designators:
1640 * - vendor specific ASCII containing the ATA serial number
1641 * - SAT defined "t10 vendor id based" containing ASCII vendor
1642 * name ("ATA "), model and serial numbers.
1da177e4
LT		 1643 *
1644 * LOCKING:
1645 * spin_lock_irqsave(host_set lock)
1646 */
1647
1648unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1649 unsigned int buflen)
1650{
b142eb65
JG		 1651 int num;
1652 const int sat_model_serial_desc_len = 68;
1653 const int ata_model_byte_len = 40;
1da177e4 1654
b142eb65
JG		 1655 rbuf[1] = 0x83; /* this page code */
1656 num = 4;
1657
1658 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1659 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2e9edbf8 1660 rbuf[num + 0] = 2;
b142eb65
JG		 1661 rbuf[num + 3] = ATA_SERNO_LEN;
1662 num += 4;
1663 ata_id_string(args->id, (unsigned char *) rbuf + num,
1664 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1665 num += ATA_SERNO_LEN;
1da177e4 1666 }
b142eb65
JG		 1667 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1668 /* SAT defined lu model and serial numbers descriptor */
1669 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2e9edbf8
JG		 1670 rbuf[num + 0] = 2;
1671 rbuf[num + 1] = 1;
b142eb65
JG		 1672 rbuf[num + 3] = sat_model_serial_desc_len;
1673 num += 4;
1674 memcpy(rbuf + num, "ATA ", 8);
1675 num += 8;
1676 ata_id_string(args->id, (unsigned char *) rbuf + num,
1677 ATA_ID_PROD_OFS, ata_model_byte_len);
1678 num += ata_model_byte_len;
1679 ata_id_string(args->id, (unsigned char *) rbuf + num,
1680 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1681 num += ATA_SERNO_LEN;
1682 }
1683 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1da177e4
LT		 1684 return 0;
1685}
1686
1687/**
0cba632b 1688 * ata_scsiop_noop - Command handler that simply returns success.
1da177e4
LT		 1689 * @args: device IDENTIFY data / SCSI command of interest.
1690 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1691 * @buflen: Response buffer length.
1692 *
1693 * No operation. Simply returns success to caller, to indicate
1694 * that the caller should successfully complete this SCSI command.
1695 *
1696 * LOCKING:
1697 * spin_lock_irqsave(host_set lock)
1698 */
1699
1700unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1701 unsigned int buflen)
1702{
1703 VPRINTK("ENTER\n");
1704 return 0;
1705}
1706
1707/**
1708 * ata_msense_push - Push data onto MODE SENSE data output buffer
1709 * @ptr_io: (input/output) Location to store more output data
1710 * @last: End of output data buffer
1711 * @buf: Pointer to BLOB being added to output buffer
1712 * @buflen: Length of BLOB
1713 *
1714 * Store MODE SENSE data on an output buffer.
1715 *
1716 * LOCKING:
1717 * None.
1718 */
1719
1720static void ata_msense_push(u8 **ptr_io, const u8 *last,
1721 const u8 *buf, unsigned int buflen)
1722{
1723 u8 *ptr = *ptr_io;
1724
1725 if ((ptr + buflen - 1) > last)
1726 return;
1727
1728 memcpy(ptr, buf, buflen);
1729
1730 ptr += buflen;
1731
1732 *ptr_io = ptr;
1733}
1734
1735/**
1736 * ata_msense_caching - Simulate MODE SENSE caching info page
1737 * @id: device IDENTIFY data
1738 * @ptr_io: (input/output) Location to store more output data
1739 * @last: End of output data buffer
1740 *
1741 * Generate a caching info page, which conditionally indicates
1742 * write caching to the SCSI layer, depending on device
1743 * capabilities.
1744 *
1745 * LOCKING:
1746 * None.
1747 */
1748
1749static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1750 const u8 *last)
1751{
00ac37f5 1752 u8 page[CACHE_MPAGE_LEN];
1da177e4 1753
00ac37f5 1754 memcpy(page, def_cache_mpage, sizeof(page));
1da177e4
LT		 1755 if (ata_id_wcache_enabled(id))
1756 page[2] |= (1 << 2); /* write cache enable */
1757 if (!ata_id_rahead_enabled(id))
1758 page[12] |= (1 << 5); /* disable read ahead */
1759
1760 ata_msense_push(ptr_io, last, page, sizeof(page));
1761 return sizeof(page);
1762}
1763
1764/**
1765 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1766 * @dev: Device associated with this MODE SENSE command
1767 * @ptr_io: (input/output) Location to store more output data
1768 * @last: End of output data buffer
1769 *
1770 * Generate a generic MODE SENSE control mode page.
1771 *
1772 * LOCKING:
1773 * None.
1774 */
1775
1776static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1777{
00ac37f5
DG		 1778 ata_msense_push(ptr_io, last, def_control_mpage,
1779 sizeof(def_control_mpage));
1780 return sizeof(def_control_mpage);
1da177e4
LT		 1781}
1782
1783/**
1784 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1785 * @dev: Device associated with this MODE SENSE command
1786 * @ptr_io: (input/output) Location to store more output data
1787 * @last: End of output data buffer
1788 *
1789 * Generate a generic MODE SENSE r/w error recovery page.
1790 *
1791 * LOCKING:
1792 * None.
1793 */
1794
1795static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1796{
1da177e4 1797
00ac37f5
DG		 1798 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1799 sizeof(def_rw_recovery_mpage));
1800 return sizeof(def_rw_recovery_mpage);
1da177e4
LT		 1801}
1802
48bdc8ec
JA		 1803/*
1804 * We can turn this into a real blacklist if it's needed, for now just
1805 * blacklist any Maxtor BANC1G10 revision firmware
1806 */
1807static int ata_dev_supports_fua(u16 *id)
1808{
1809 unsigned char model[41], fw[9];
1810
c3c013a2
JG		 1811 if (!libata_fua)
1812 return 0;
48bdc8ec
JA		 1813 if (!ata_id_has_fua(id))
1814 return 0;
1815
6a62a04d
TH		 1816 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1817 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
48bdc8ec 1818
2e02671d 1819 if (strcmp(model, "Maxtor"))
48bdc8ec 1820 return 1;
2e02671d 1821 if (strcmp(fw, "BANC1G10"))
48bdc8ec
JA		 1822 return 1;
1823
1824 return 0; /* blacklisted */
1825}
1826
1da177e4
LT		 1827/**
1828 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1829 * @args: device IDENTIFY data / SCSI command of interest.
1830 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1831 * @buflen: Response buffer length.
1832 *
00ac37f5
DG		 1833 * Simulate MODE SENSE commands. Assume this is invoked for direct
1834 * access devices (e.g. disks) only. There should be no block
1835 * descriptor for other device types.
1da177e4
LT		 1836 *
1837 * LOCKING:
1838 * spin_lock_irqsave(host_set lock)
1839 */
1840
1841unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1842 unsigned int buflen)
1843{
9a3dccc4 1844 struct ata_device *dev = args->dev;
1da177e4 1845 u8 *scsicmd = args->cmd->cmnd, *p, *last;
00ac37f5
DG		 1846 const u8 sat_blk_desc[] = {
1847 0, 0, 0, 0, /* number of blocks: sat unspecified */
1848 0,
1849 0, 0x2, 0x0 /* block length: 512 bytes */
1850 };
1851 u8 pg, spg;
1852 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
9a3dccc4 1853 u8 dpofua;
1da177e4
LT		 1854
1855 VPRINTK("ENTER\n");
1856
1857 six_byte = (scsicmd[0] == MODE_SENSE);
00ac37f5
DG		 1858 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1859 /*
1860 * LLBA bit in msense(10) ignored (compliant)
1da177e4 1861 */
00ac37f5 1862
1da177e4 1863 page_control = scsicmd[2] >> 6;
ae006510
DG		 1864 switch (page_control) {
1865 case 0: /* current */
1866 break; /* supported */
1867 case 3: /* saved */
1868 goto saving_not_supp;
1869 case 1: /* changeable */
1870 case 2: /* defaults */
1871 default:
1872 goto invalid_fld;
1873 }
1da177e4 1874
00ac37f5
DG		 1875 if (six_byte) {
1876 output_len = 4 + (ebd ? 8 : 0);
1877 alloc_len = scsicmd[4];
1878 } else {
1879 output_len = 8 + (ebd ? 8 : 0);
1880 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1881 }
1882 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1da177e4
LT		 1883
1884 p = rbuf + output_len;
00ac37f5 1885 last = rbuf + minlen - 1;
1da177e4 1886
00ac37f5
DG		 1887 pg = scsicmd[2] & 0x3f;
1888 spg = scsicmd[3];
1889 /*
1890 * No mode subpages supported (yet) but asking for _all_
1891 * subpages may be valid
1892 */
1893 if (spg && (spg != ALL_SUB_MPAGES))
1894 goto invalid_fld;
1895
1896 switch(pg) {
1897 case RW_RECOVERY_MPAGE:
1da177e4
LT		 1898 output_len += ata_msense_rw_recovery(&p, last);
1899 break;
1900
00ac37f5 1901 case CACHE_MPAGE:
1da177e4
LT		 1902 output_len += ata_msense_caching(args->id, &p, last);
1903 break;
1904
00ac37f5 1905 case CONTROL_MPAGE: {
1da177e4
LT		 1906 output_len += ata_msense_ctl_mode(&p, last);
1907 break;
1908 }
1909
00ac37f5 1910 case ALL_MPAGES:
1da177e4
LT		 1911 output_len += ata_msense_rw_recovery(&p, last);
1912 output_len += ata_msense_caching(args->id, &p, last);
1913 output_len += ata_msense_ctl_mode(&p, last);
1914 break;
1915
1916 default: /* invalid page code */
ae006510 1917 goto invalid_fld;
1da177e4
LT		 1918 }
1919
00ac37f5
DG		 1920 if (minlen < 1)
1921 return 0;
9a3dccc4
TH		 1922
1923 dpofua = 0;
f79d409f 1924 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
9a3dccc4
TH		 1925 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1926 dpofua = 1 << 4;
1927
1da177e4
LT		 1928 if (six_byte) {
1929 output_len--;
1930 rbuf[0] = output_len;
9a3dccc4
TH		 1931 if (minlen > 2)
1932 rbuf[2] |= dpofua;
00ac37f5
DG		 1933 if (ebd) {
1934 if (minlen > 3)
1935 rbuf[3] = sizeof(sat_blk_desc);
1936 if (minlen > 11)
1937 memcpy(rbuf + 4, sat_blk_desc,
1938 sizeof(sat_blk_desc));
1939 }
1da177e4
LT		 1940 } else {
1941 output_len -= 2;
1942 rbuf[0] = output_len >> 8;
00ac37f5
DG		 1943 if (minlen > 1)
1944 rbuf[1] = output_len;
9a3dccc4
TH		 1945 if (minlen > 3)
1946 rbuf[3] |= dpofua;
00ac37f5
DG		 1947 if (ebd) {
1948 if (minlen > 7)
1949 rbuf[7] = sizeof(sat_blk_desc);
1950 if (minlen > 15)
1951 memcpy(rbuf + 8, sat_blk_desc,
1952 sizeof(sat_blk_desc));
1953 }
1da177e4 1954 }
1da177e4 1955 return 0;
ae006510
DG		 1956
1957invalid_fld:
1958 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1959 /* "Invalid field in cbd" */
1960 return 1;
1961
1962saving_not_supp:
1963 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1964 /* "Saving parameters not supported" */
1965 return 1;
1da177e4
LT		 1966}
1967
1968/**
1969 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1970 * @args: device IDENTIFY data / SCSI command of interest.
1971 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1972 * @buflen: Response buffer length.
1973 *
1974 * Simulate READ CAPACITY commands.
1975 *
1976 * LOCKING:
1977 * spin_lock_irqsave(host_set lock)
1978 */
1979
1980unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1981 unsigned int buflen)
1982{
1983 u64 n_sectors;
1984 u32 tmp;
1985
1986 VPRINTK("ENTER\n");
1987
8bf62ece
AL		 1988 if (ata_id_has_lba(args->id)) {
1989 if (ata_id_has_lba48(args->id))
1990 n_sectors = ata_id_u64(args->id, 100);
1991 else
1992 n_sectors = ata_id_u32(args->id, 60);
1993 } else {
1994 /* CHS default translation */
1995 n_sectors = args->id[1] * args->id[3] * args->id[6];
1996
1997 if (ata_id_current_chs_valid(args->id))
1998 /* CHS current translation */
1999 n_sectors = ata_id_u32(args->id, 57);
2000 }
2001
1da177e4
LT		 2002 n_sectors--; /* ATA TotalUserSectors - 1 */
2003
1da177e4 2004 if (args->cmd->cmnd[0] == READ_CAPACITY) {
0c144d0d
PP		 2005 if( n_sectors >= 0xffffffffULL )
2006 tmp = 0xffffffff ; /* Return max count on overflow */
2007 else
2008 tmp = n_sectors ;
2009
1da177e4
LT		 2010 /* sector count, 32-bit */
2011 rbuf[0] = tmp >> (8 * 3);
2012 rbuf[1] = tmp >> (8 * 2);
2013 rbuf[2] = tmp >> (8 * 1);
2014 rbuf[3] = tmp;
2015
2016 /* sector size */
2017 tmp = ATA_SECT_SIZE;
2018 rbuf[6] = tmp >> 8;
2019 rbuf[7] = tmp;
2020
2021 } else {
2022 /* sector count, 64-bit */
0c144d0d
PP		 2023 tmp = n_sectors >> (8 * 4);
2024 rbuf[2] = tmp >> (8 * 3);
2025 rbuf[3] = tmp >> (8 * 2);
2026 rbuf[4] = tmp >> (8 * 1);
2027 rbuf[5] = tmp;
2028 tmp = n_sectors;
1da177e4
LT		 2029 rbuf[6] = tmp >> (8 * 3);
2030 rbuf[7] = tmp >> (8 * 2);
2031 rbuf[8] = tmp >> (8 * 1);
2032 rbuf[9] = tmp;
2033
2034 /* sector size */
2035 tmp = ATA_SECT_SIZE;
2036 rbuf[12] = tmp >> 8;
2037 rbuf[13] = tmp;
2038 }
2039
2040 return 0;
2041}
2042
2043/**
2044 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2045 * @args: device IDENTIFY data / SCSI command of interest.
2046 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2047 * @buflen: Response buffer length.
2048 *
2049 * Simulate REPORT LUNS command.
2050 *
2051 * LOCKING:
2052 * spin_lock_irqsave(host_set lock)
2053 */
2054
2055unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2056 unsigned int buflen)
2057{
2058 VPRINTK("ENTER\n");
2059 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2060
2061 return 0;
2062}
2063
845c5834
DG		 2064/**
2065 * ata_scsi_set_sense - Set SCSI sense data and status
2066 * @cmd: SCSI request to be handled
2067 * @sk: SCSI-defined sense key
2068 * @asc: SCSI-defined additional sense code
2069 * @ascq: SCSI-defined additional sense code qualifier
2070 *
2071 * Helper function that builds a valid fixed format, current
2072 * response code and the given sense key (sk), additional sense
2073 * code (asc) and additional sense code qualifier (ascq) with
2074 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2075 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2076 *
2077 * LOCKING:
2078 * Not required
2079 */
2080
2081void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2082{
2083 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2084
2085 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2086 cmd->sense_buffer[2] = sk;
2087 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2088 cmd->sense_buffer[12] = asc;
2089 cmd->sense_buffer[13] = ascq;
2090}
2091
1da177e4
LT		 2092/**
2093 * ata_scsi_badcmd - End a SCSI request with an error
2094 * @cmd: SCSI request to be handled
2095 * @done: SCSI command completion function
2096 * @asc: SCSI-defined additional sense code
2097 * @ascq: SCSI-defined additional sense code qualifier
2098 *
2099 * Helper function that completes a SCSI command with
2100 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2101 * and the specified additional sense codes.
2102 *
2103 * LOCKING:
2104 * spin_lock_irqsave(host_set lock)
2105 */
2106
2107void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2108{
2109 DPRINTK("ENTER\n");
ae006510 2110 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1da177e4
LT		 2111
2112 done(cmd);
2113}
2114
77853bf2 2115static void atapi_sense_complete(struct ata_queued_cmd *qc)
a939c963 2116{
74e6c8c3 2117 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
c6e6e666
JG		 2118 /* FIXME: not quite right; we don't want the
2119 * translation of taskfile registers into
2120 * a sense descriptors, since that's only
2121 * correct for ATA, not ATAPI
2122 */
2123 ata_gen_ata_desc_sense(qc);
74e6c8c3 2124 }
a939c963 2125
c6e6e666 2126 qc->scsidone(qc->scsicmd);
77853bf2 2127 ata_qc_free(qc);
c6e6e666 2128}
a939c963 2129
c6e6e666
JG		 2130/* is it pointless to prefer PIO for "safety reasons"? */
2131static inline int ata_pio_use_silly(struct ata_port *ap)
2132{
2133 return (ap->flags & ATA_FLAG_PIO_DMA);
2134}
2135
2136static void atapi_request_sense(struct ata_queued_cmd *qc)
2137{
2138 struct ata_port *ap = qc->ap;
2139 struct scsi_cmnd *cmd = qc->scsicmd;
2140
2141 DPRINTK("ATAPI request sense\n");
a939c963
JG		 2142
2143 /* FIXME: is this needed? */
2144 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2145
c6e6e666
JG		 2146 ap->ops->tf_read(ap, &qc->tf);
2147
2148 /* fill these in, for the case where they are -not- overwritten */
2149 cmd->sense_buffer[0] = 0x70;
2150 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2151
2152 ata_qc_reinit(qc);
2153
a939c963
JG		 2154 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2155 qc->dma_dir = DMA_FROM_DEVICE;
2156
6e7846e9 2157 memset(&qc->cdb, 0, qc->dev->cdb_len);
a939c963
JG		 2158 qc->cdb[0] = REQUEST_SENSE;
2159 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2160
2161 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2162 qc->tf.command = ATA_CMD_PACKET;
2163
c6e6e666
JG		 2164 if (ata_pio_use_silly(ap)) {
2165 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2166 qc->tf.feature |= ATAPI_PKT_DMA;
2167 } else {
2168 qc->tf.protocol = ATA_PROT_ATAPI;
2169 qc->tf.lbam = (8 * 1024) & 0xff;
2170 qc->tf.lbah = (8 * 1024) >> 8;
2171 }
a939c963
JG		 2172 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2173
c6e6e666 2174 qc->complete_fn = atapi_sense_complete;
a939c963 2175
8e0e694a 2176 ata_qc_issue(qc);
a939c963
JG		 2177
2178 DPRINTK("EXIT\n");
2179}
2180
77853bf2 2181static void atapi_qc_complete(struct ata_queued_cmd *qc)
1da177e4
LT		 2182{
2183 struct scsi_cmnd *cmd = qc->scsicmd;
a22e2eb0 2184 unsigned int err_mask = qc->err_mask;
1da177e4 2185
a7dac447 2186 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
e12669e7 2187
246619da
TH		 2188 /* handle completion from new EH */
2189 if (unlikely(qc->ap->ops->error_handler &&
2190 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2191
2192 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2193 /* FIXME: not quite right; we don't want the
2194 * translation of taskfile registers into a
2195 * sense descriptors, since that's only
2196 * correct for ATA, not ATAPI
2197 */
2198 ata_gen_ata_desc_sense(qc);
2199 }
2200
2201 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2202 qc->scsidone(cmd);
2203 ata_qc_free(qc);
2204 return;
2205 }
2206
2207 /* successful completion or old EH failure path */
a7dac447 2208 if (unlikely(err_mask & AC_ERR_DEV)) {
1da177e4 2209 cmd->result = SAM_STAT_CHECK_CONDITION;
c6e6e666 2210 atapi_request_sense(qc);
77853bf2 2211 return;
74e6c8c3 2212 } else if (unlikely(err_mask)) {
a7dac447
JG		 2213 /* FIXME: not quite right; we don't want the
2214 * translation of taskfile registers into
2215 * a sense descriptors, since that's only
2216 * correct for ATA, not ATAPI
2217 */
2218 ata_gen_ata_desc_sense(qc);
74e6c8c3 2219 } else {
1da177e4
LT		 2220 u8 *scsicmd = cmd->cmnd;
2221
fd71da46 2222 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
1da177e4
LT		 2223 u8 *buf = NULL;
2224 unsigned int buflen;
2225
2226 buflen = ata_scsi_rbuf_get(cmd, &buf);
a15dbeb4
JG		 2227
2228 /* ATAPI devices typically report zero for their SCSI version,
2229 * and sometimes deviate from the spec WRT response data
2230 * format. If SCSI version is reported as zero like normal,
2231 * then we make the following fixups: 1) Fake MMC-5 version,
2232 * to indicate to the Linux scsi midlayer this is a modern
2233 * device. 2) Ensure response data format / ATAPI information
2234 * are always correct.
a15dbeb4
JG		 2235 */
2236 if (buf[2] == 0) {
2237 buf[2] = 0x5;
2238 buf[3] = 0x32;
2239 }
2240
1da177e4
LT		 2241 ata_scsi_rbuf_put(cmd, buf);
2242 }
a15dbeb4 2243
1da177e4
LT		 2244 cmd->result = SAM_STAT_GOOD;
2245 }
2246
2247 qc->scsidone(cmd);
77853bf2 2248 ata_qc_free(qc);
1da177e4
LT		 2249}
2250/**
2251 * atapi_xlat - Initialize PACKET taskfile
2252 * @qc: command structure to be initialized
2253 * @scsicmd: SCSI CDB associated with this PACKET command
2254 *
2255 * LOCKING:
2256 * spin_lock_irqsave(host_set lock)
2257 *
2258 * RETURNS:
2259 * Zero on success, non-zero on failure.
2260 */
2261
057ace5e 2262static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1da177e4
LT		 2263{
2264 struct scsi_cmnd *cmd = qc->scsicmd;
2265 struct ata_device *dev = qc->dev;
2266 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db055 2267 int nodata = (cmd->sc_data_direction == DMA_NONE);
1da177e4
LT		 2268
2269 if (!using_pio)
2270 /* Check whether ATAPI DMA is safe */
2271 if (ata_check_atapi_dma(qc))
2272 using_pio = 1;
2273
6e7846e9 2274 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
1da177e4
LT		 2275
2276 qc->complete_fn = atapi_qc_complete;
2277
2278 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db055 2279 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1da177e4
LT		 2280 qc->tf.flags |= ATA_TFLAG_WRITE;
2281 DPRINTK("direction: write\n");
2282 }
2283
2284 qc->tf.command = ATA_CMD_PACKET;
2285
2286 /* no data, or PIO data xfer */
2287 if (using_pio || nodata) {
2288 if (nodata)
2289 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2290 else
2291 qc->tf.protocol = ATA_PROT_ATAPI;
2292 qc->tf.lbam = (8 * 1024) & 0xff;
2293 qc->tf.lbah = (8 * 1024) >> 8;
2294 }
2295
2296 /* DMA data xfer */
2297 else {
2298 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2299 qc->tf.feature |= ATAPI_PKT_DMA;
2300
95de719a
AL		 2301 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2302 /* some SATA bridges need us to indicate data xfer direction */
1da177e4 2303 qc->tf.feature |= ATAPI_DMADIR;
1da177e4
LT		 2304 }
2305
2306 qc->nbytes = cmd->bufflen;
2307
2308 return 0;
2309}
2310
ab5b3a5b
TH		 2311static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2312{
2313 if (likely(id < ATA_MAX_DEVICES))
2314 return &ap->device[id];
2315 return NULL;
2316}
2317
2318static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2319 const struct scsi_device *scsidev)
2320{
2321 /* skip commands not addressed to targets we simulate */
2322 if (unlikely(scsidev->channel || scsidev->lun))
2323 return NULL;
2324
2325 return ata_find_dev(ap, scsidev->id);
2326}
2327
1da177e4
LT		 2328/**
2329 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2330 * @ap: ATA port to which the device is attached
2331 * @scsidev: SCSI device from which we derive the ATA device
2332 *
2333 * Given various information provided in struct scsi_cmnd,
2334 * map that onto an ATA bus, and using that mapping
2335 * determine which ata_device is associated with the
2336 * SCSI command to be sent.
2337 *
2338 * LOCKING:
2339 * spin_lock_irqsave(host_set lock)
2340 *
2341 * RETURNS:
2342 * Associated ATA device, or %NULL if not found.
2343 */
1da177e4 2344static struct ata_device *
057ace5e 2345ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
1da177e4 2346{
ab5b3a5b 2347 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
1da177e4 2348
ab5b3a5b 2349 if (unlikely(!dev || !ata_dev_enabled(dev)))
1da177e4
LT		 2350 return NULL;
2351
50630195
JG		 2352 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2353 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
f15a1daf
TH		 2354 ata_dev_printk(dev, KERN_WARNING,
2355 "WARNING: ATAPI is %s, device ignored.\n",
2356 atapi_enabled ? "not supported with this driver" : "disabled");
1623c81e 2357 return NULL;
50630195 2358 }
1623c81e 2359 }
1da177e4
LT		 2360
2361 return dev;
2362}
2363
b095518e
JG		 2364/*
2365 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2366 * @byte1: Byte 1 from pass-thru CDB.
2367 *
2368 * RETURNS:
2369 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2370 */
2371static u8
2372ata_scsi_map_proto(u8 byte1)
2373{
2374 switch((byte1 & 0x1e) >> 1) {
2375 case 3: /* Non-data */
2376 return ATA_PROT_NODATA;
2377
2378 case 6: /* DMA */
2379 return ATA_PROT_DMA;
2380
2381 case 4: /* PIO Data-in */
2382 case 5: /* PIO Data-out */
b095518e
JG		 2383 return ATA_PROT_PIO;
2384
2385 case 10: /* Device Reset */
2386 case 0: /* Hard Reset */
2387 case 1: /* SRST */
2388 case 2: /* Bus Idle */
2389 case 7: /* Packet */
2390 case 8: /* DMA Queued */
2391 case 9: /* Device Diagnostic */
2392 case 11: /* UDMA Data-in */
2393 case 12: /* UDMA Data-Out */
2394 case 13: /* FPDMA */
2395 default: /* Reserved */
2396 break;
2397 }
2398
2399 return ATA_PROT_UNKNOWN;
2400}
2401
2402/**
2403 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2404 * @qc: command structure to be initialized
8e8b77dd 2405 * @scsicmd: SCSI command to convert
b095518e
JG		 2406 *
2407 * Handles either 12 or 16-byte versions of the CDB.
2408 *
2409 * RETURNS:
2410 * Zero on success, non-zero on failure.
2411 */
2412static unsigned int
00ac37f5 2413ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
b095518e
JG		 2414{
2415 struct ata_taskfile *tf = &(qc->tf);
2416 struct scsi_cmnd *cmd = qc->scsicmd;
f79d409f 2417 struct ata_device *dev = qc->dev;
b095518e
JG		 2418
2419 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
9a405257 2420 goto invalid_fld;
8190bdb9 2421
f79d409f
AC		 2422 /* We may not issue DMA commands if no DMA mode is set */
2423 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2424 goto invalid_fld;
b095518e 2425
f59b0cf8
AL		 2426 if (scsicmd[1] & 0xe0)
2427 /* PIO multi not supported yet */
2428 goto invalid_fld;
2429
b095518e
JG		 2430 /*
2431 * 12 and 16 byte CDBs use different offsets to
2432 * provide the various register values.
2433 */
2434 if (scsicmd[0] == ATA_16) {
2435 /*
2436 * 16-byte CDB - may contain extended commands.
2437 *
2438 * If that is the case, copy the upper byte register values.
2439 */
2440 if (scsicmd[1] & 0x01) {
2441 tf->hob_feature = scsicmd[3];
2442 tf->hob_nsect = scsicmd[5];
2443 tf->hob_lbal = scsicmd[7];
2444 tf->hob_lbam = scsicmd[9];
2445 tf->hob_lbah = scsicmd[11];
2446 tf->flags |= ATA_TFLAG_LBA48;
2447 } else
2448 tf->flags &= ~ATA_TFLAG_LBA48;
2449
2450 /*
2451 * Always copy low byte, device and command registers.
2452 */
2453 tf->feature = scsicmd[4];
2454 tf->nsect = scsicmd[6];
2455 tf->lbal = scsicmd[8];
2456 tf->lbam = scsicmd[10];
2457 tf->lbah = scsicmd[12];
2458 tf->device = scsicmd[13];
2459 tf->command = scsicmd[14];
2460 } else {
2461 /*
2462 * 12-byte CDB - incapable of extended commands.
2463 */
2464 tf->flags &= ~ATA_TFLAG_LBA48;
2465
2466 tf->feature = scsicmd[3];
2467 tf->nsect = scsicmd[4];
2468 tf->lbal = scsicmd[5];
2469 tf->lbam = scsicmd[6];
2470 tf->lbah = scsicmd[7];
2471 tf->device = scsicmd[8];
2472 tf->command = scsicmd[9];
2473 }
dcc2d1e7
ML		 2474 /*
2475 * If slave is possible, enforce correct master/slave bit
2476 */
2477 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2478 tf->device = qc->dev->devno ?
2479 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
b095518e
JG		 2480
2481 /*
2482 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2483 * SET_FEATURES - XFER MODE must be preceded/succeeded
2484 * by an update to hardware-specific registers for each
2485 * controller (i.e. the reason for ->set_piomode(),
2486 * ->set_dmamode(), and ->post_set_mode() hooks).
2487 */
2488 if ((tf->command == ATA_CMD_SET_FEATURES)
2489 && (tf->feature == SETFEATURES_XFER))
9a405257 2490 goto invalid_fld;
b095518e
JG		 2491
2492 /*
2493 * Set flags so that all registers will be written,
2494 * and pass on write indication (used for PIO/DMA
2495 * setup.)
2496 */
2497 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2498
0274aa25 2499 if (cmd->sc_data_direction == DMA_TO_DEVICE)
b095518e
JG		 2500 tf->flags |= ATA_TFLAG_WRITE;
2501
2502 /*
2503 * Set transfer length.
2504 *
2505 * TODO: find out if we need to do more here to
2506 * cover scatter/gather case.
2507 */
2508 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2509
e61e0672
TH		 2510 /* request result TF */
2511 qc->flags |= ATA_QCFLAG_RESULT_TF;
2512
b095518e 2513 return 0;
9a405257
TH		 2514
2515 invalid_fld:
2516 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2517 /* "Invalid field in cdb" */
2518 return 1;
b095518e
JG		 2519}
2520
1da177e4
LT		 2521/**
2522 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2523 * @dev: ATA device
2524 * @cmd: SCSI command opcode to consider
2525 *
2526 * Look up the SCSI command given, and determine whether the
2527 * SCSI command is to be translated or simulated.
2528 *
2529 * RETURNS:
2530 * Pointer to translation function if possible, %NULL if not.
2531 */
2532
2533static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2534{
2535 switch (cmd) {
2536 case READ_6:
2537 case READ_10:
2538 case READ_16:
2539
2540 case WRITE_6:
2541 case WRITE_10:
2542 case WRITE_16:
2543 return ata_scsi_rw_xlat;
2544
2545 case SYNCHRONIZE_CACHE:
2546 if (ata_try_flush_cache(dev))
2547 return ata_scsi_flush_xlat;
2548 break;
2549
2550 case VERIFY:
2551 case VERIFY_16:
2552 return ata_scsi_verify_xlat;
b095518e
JG		 2553
2554 case ATA_12:
2555 case ATA_16:
2556 return ata_scsi_pass_thru;
da61396d 2557
972dcafb
DG		 2558 case START_STOP:
2559 return ata_scsi_start_stop_xlat;
1da177e4
LT		 2560 }
2561
2562 return NULL;
2563}
2564
2565/**
2566 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2567 * @ap: ATA port to which the command was being sent
2568 * @cmd: SCSI command to dump
2569 *
2570 * Prints the contents of a SCSI command via printk().
2571 */
2572
2573static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2574 struct scsi_cmnd *cmd)
2575{
2576#ifdef ATA_DEBUG
2577 struct scsi_device *scsidev = cmd->device;
2578 u8 *scsicmd = cmd->cmnd;
2579
2580 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2581 ap->id,
2582 scsidev->channel, scsidev->id, scsidev->lun,
2583 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2584 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2585 scsicmd[8]);
2586#endif
2587}
2588
2115ea94
TH		 2589static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2590 void (*done)(struct scsi_cmnd *),
2591 struct ata_device *dev)
eb3f0f9c 2592{
2115ea94
TH		 2593 int rc = 0;
2594
eb3f0f9c
BK		 2595 if (dev->class == ATA_DEV_ATA) {
2596 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2597 cmd->cmnd[0]);
2598
2599 if (xlat_func)
2115ea94 2600 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
eb3f0f9c 2601 else
3373efd8 2602 ata_scsi_simulate(dev, cmd, done);
eb3f0f9c 2603 } else
2115ea94
TH		 2604 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2605
2606 return rc;
eb3f0f9c
BK		 2607}
2608
1da177e4
LT		 2609/**
2610 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2611 * @cmd: SCSI command to be sent
2612 * @done: Completion function, called when command is complete
2613 *
2614 * In some cases, this function translates SCSI commands into
2615 * ATA taskfiles, and queues the taskfiles to be sent to
2616 * hardware. In other cases, this function simulates a
2617 * SCSI device by evaluating and responding to certain
2618 * SCSI commands. This creates the overall effect of
2619 * ATA and ATAPI devices appearing as SCSI devices.
2620 *
2621 * LOCKING:
2622 * Releases scsi-layer-held lock, and obtains host_set lock.
2623 *
2624 * RETURNS:
2115ea94
TH		 2625 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2626 * 0 otherwise.
1da177e4 2627 */
1da177e4
LT		 2628int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2629{
2630 struct ata_port *ap;
2631 struct ata_device *dev;
2632 struct scsi_device *scsidev = cmd->device;
005a5a06 2633 struct Scsi_Host *shost = scsidev->host;
2115ea94 2634 int rc = 0;
1da177e4 2635
35bb94b1 2636 ap = ata_shost_to_port(shost);
005a5a06
JG		 2637
2638 spin_unlock(shost->host_lock);
2639 spin_lock(&ap->host_set->lock);
1da177e4
LT		 2640
2641 ata_scsi_dump_cdb(ap, cmd);
2642
2643 dev = ata_scsi_find_dev(ap, scsidev);
eb3f0f9c 2644 if (likely(dev))
2115ea94 2645 rc = __ata_scsi_queuecmd(cmd, done, dev);
eb3f0f9c 2646 else {
1da177e4
LT		 2647 cmd->result = (DID_BAD_TARGET << 16);
2648 done(cmd);
1da177e4
LT		 2649 }
2650
005a5a06
JG		 2651 spin_unlock(&ap->host_set->lock);
2652 spin_lock(shost->host_lock);
2115ea94 2653 return rc;
1da177e4
LT		 2654}
2655
2656/**
2657 * ata_scsi_simulate - simulate SCSI command on ATA device
c893a3ae 2658 * @dev: the target device
1da177e4
LT		 2659 * @cmd: SCSI command being sent to device.
2660 * @done: SCSI command completion function.
2661 *
2662 * Interprets and directly executes a select list of SCSI commands
2663 * that can be handled internally.
2664 *
2665 * LOCKING:
2666 * spin_lock_irqsave(host_set lock)
2667 */
2668
3373efd8 2669void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 2670 void (*done)(struct scsi_cmnd *))
2671{
2672 struct ata_scsi_args args;
057ace5e 2673 const u8 *scsicmd = cmd->cmnd;
1da177e4 2674
9a3dccc4
TH		 2675 args.dev = dev;
2676 args.id = dev->id;
1da177e4
LT		 2677 args.cmd = cmd;
2678 args.done = done;
2679
2680 switch(scsicmd[0]) {
2681 /* no-op's, complete with success */
2682 case SYNCHRONIZE_CACHE:
2683 case REZERO_UNIT:
2684 case SEEK_6:
2685 case SEEK_10:
2686 case TEST_UNIT_READY:
2687 case FORMAT_UNIT: /* FIXME: correct? */
2688 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2689 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2690 break;
2691
2692 case INQUIRY:
2693 if (scsicmd[1] & 2) /* is CmdDt set? */
ae006510 2694 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2695 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2696 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2697 else if (scsicmd[2] == 0x00)
2698 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2699 else if (scsicmd[2] == 0x80)
2700 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2701 else if (scsicmd[2] == 0x83)
2702 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2703 else
ae006510 2704 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2705 break;
2706
2707 case MODE_SENSE:
2708 case MODE_SENSE_10:
2709 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2710 break;
2711
2712 case MODE_SELECT: /* unconditionally return */
2713 case MODE_SELECT_10: /* bad-field-in-cdb */
ae006510 2714 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2715 break;
2716
2717 case READ_CAPACITY:
2718 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2719 break;
2720
2721 case SERVICE_ACTION_IN:
2722 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2723 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2724 else
ae006510 2725 ata_scsi_invalid_field(cmd, done);
1da177e4
LT		 2726 break;
2727
2728 case REPORT_LUNS:
2729 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2730 break;
2731
b095518e 2732 /* mandatory commands we haven't implemented yet */
1da177e4
LT		 2733 case REQUEST_SENSE:
2734
2735 /* all other commands */
2736 default:
ae006510
DG		 2737 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2738 /* "Invalid command operation code" */
2739 done(cmd);
1da177e4
LT		 2740 break;
2741 }
2742}
2743
644dd0cc
JG		 2744void ata_scsi_scan_host(struct ata_port *ap)
2745{
2746 unsigned int i;
2747
198e0fed 2748 if (ap->flags & ATA_FLAG_DISABLED)
644dd0cc
JG		 2749 return;
2750
3f19ee8c 2751 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3edebac4
TH		 2752 struct ata_device *dev = &ap->device[i];
2753 struct scsi_device *sdev;
2754
2755 if (!ata_dev_enabled(dev) || dev->sdev)
2756 continue;
3f19ee8c 2757
3edebac4
TH		 2758 sdev = __scsi_add_device(ap->host, 0, i, 0, NULL);
2759 if (!IS_ERR(sdev)) {
2760 dev->sdev = sdev;
2761 scsi_device_put(sdev);
2762 }
3f19ee8c 2763 }
644dd0cc 2764}
kernel source for telekom puls (alcatel/mediatek)