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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * 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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <scsi/scsi_host.h>
Mike Christie85837eb2005-11-11 16:38:53 -060041#include <scsi/scsi_eh.h>
Jeff Garzik005a5a02005-10-30 23:31:48 -050042#include <scsi/scsi_device.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050043#include <scsi/scsi_request.h>
Tejun Heo30afc842006-03-18 18:40:14 +090044#include <scsi/scsi_transport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/libata.h>
Jeff Garzikb0955182005-05-12 15:45:22 -040046#include <linux/hdreg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/uaccess.h>
48
49#include "libata.h"
50
Jeff Garzikb0955182005-05-12 15:45:22 -040051#define SECTOR_SIZE 512
52
Jeff Garzik057ace52005-10-22 14:27:05 -040053typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -040055ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
Tejun Heo30afc842006-03-18 18:40:14 +090056enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040058#define RW_RECOVERY_MPAGE 0x1
59#define RW_RECOVERY_MPAGE_LEN 12
60#define CACHE_MPAGE 0x8
61#define CACHE_MPAGE_LEN 20
62#define CONTROL_MPAGE 0xa
63#define CONTROL_MPAGE_LEN 12
64#define ALL_MPAGES 0x3f
65#define ALL_SUB_MPAGES 0xff
66
67
68static const u8 def_rw_recovery_mpage[] = {
69 RW_RECOVERY_MPAGE,
70 RW_RECOVERY_MPAGE_LEN - 2,
71 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
72 (1 << 6), /* ARRE (auto read reallocation) */
73 0, /* read retry count */
74 0, 0, 0, 0,
75 0, /* write retry count */
76 0, 0, 0
77};
78
79static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
80 CACHE_MPAGE,
81 CACHE_MPAGE_LEN - 2,
82 0, /* contains WCE, needs to be 0 for logic */
83 0, 0, 0, 0, 0, 0, 0, 0, 0,
84 0, /* contains DRA, needs to be 0 for logic */
85 0, 0, 0, 0, 0, 0, 0
86};
87
88static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
89 CONTROL_MPAGE,
90 CONTROL_MPAGE_LEN - 2,
91 2, /* DSENSE=0, GLTSD=1 */
92 0, /* [QAM+QERR may be 1, see 05-359r1] */
93 0, 0, 0, 0, 0xff, 0xff,
94 0, 30 /* extended self test time, see 05-359r1 */
95};
96
Tejun Heo30afc842006-03-18 18:40:14 +090097/*
98 * libata transport template. libata doesn't do real transport stuff.
99 * It just needs the eh_timed_out hook.
100 */
101struct scsi_transport_template ata_scsi_transport_template = {
102 .eh_timed_out = ata_scsi_timed_out,
103};
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Douglas Gilbertae006512005-10-09 09:09:35 -0400106static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114/**
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
Jeff Garzikb0955182005-05-12 15:45:22 -0400143/**
144 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800145 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400146 * @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;
Mike Christie85837eb2005-11-11 16:38:53 -0600161 struct scsi_sense_hdr sshdr;
162 enum dma_data_direction data_dir;
Jeff Garzikb0955182005-05-12 15:45:22 -0400163
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500164 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400165 return -EINVAL;
166
167 if (copy_from_user(args, arg, sizeof(args)))
168 return -EFAULT;
169
Jeff Garzikb0955182005-05-12 15:45:22 -0400170 memset(scsi_cmd, 0, sizeof(scsi_cmd));
171
172 if (args[3]) {
173 argsize = SECTOR_SIZE * args[3];
174 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400175 if (argbuf == NULL) {
176 rc = -ENOMEM;
177 goto error;
178 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400179
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 */
Mike Christie85837eb2005-11-11 16:38:53 -0600183 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400184 } else {
185 scsi_cmd[1] = (3 << 1); /* Non-data */
186 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600187 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400188 }
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... */
Mike Christie85837eb2005-11-11 16:38:53 -0600205 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
206 &sshdr, (10*HZ), 5)) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400207 rc = -EIO;
208 goto error;
209 }
210
211 /* Need code to retrieve data from check condition? */
212
213 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500214 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400215 rc = -EFAULT;
216error:
Jeff Garzikb0955182005-05-12 15:45:22 -0400217 if (argbuf)
218 kfree(argbuf);
219
220 return rc;
221}
222
223/**
224 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800225 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400226 * @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];
Mike Christie85837eb2005-11-11 16:38:53 -0600239 struct scsi_sense_hdr sshdr;
Jeff Garzikb0955182005-05-12 15:45:22 -0400240
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500241 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400242 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
Jeff Garzikb0955182005-05-12 15:45:22 -0400258 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500259 from scsi_ioctl_send_command() for default case... */
Mike Christie85837eb2005-11-11 16:38:53 -0600260 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
261 (10*HZ), 5))
Jeff Garzikb0955182005-05-12 15:45:22 -0400262 rc = -EIO;
Jeff Garzikb0955182005-05-12 15:45:22 -0400263
264 /* Need code to retrieve data from check condition? */
Jeff Garzikb0955182005-05-12 15:45:22 -0400265 return rc;
266}
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
269{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 int val = -EINVAL, rc = -EINVAL;
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 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
Jeff Garzikb0955182005-05-12 15:45:22 -0400285 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 default:
296 rc = -ENOTTY;
297 break;
298 }
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 return rc;
301}
302
303/**
304 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
305 * @ap: ATA port to which the new command is attached
306 * @dev: ATA device to which the new command is attached
307 * @cmd: SCSI command that originated this ATA command
308 * @done: SCSI command completion function
309 *
310 * Obtain a reference to an unused ata_queued_cmd structure,
311 * which is the basic libata structure representing a single
312 * ATA command sent to the hardware.
313 *
314 * If a command was available, fill in the SCSI-specific
315 * portions of the structure with information on the
316 * current command.
317 *
318 * LOCKING:
319 * spin_lock_irqsave(host_set lock)
320 *
321 * RETURNS:
322 * Command allocated, or %NULL if none available.
323 */
324struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
325 struct ata_device *dev,
326 struct scsi_cmnd *cmd,
327 void (*done)(struct scsi_cmnd *))
328{
329 struct ata_queued_cmd *qc;
330
331 qc = ata_qc_new_init(ap, dev);
332 if (qc) {
333 qc->scsicmd = cmd;
334 qc->scsidone = done;
335
336 if (cmd->use_sg) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400337 qc->__sg = (struct scatterlist *) cmd->request_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 qc->n_elem = cmd->use_sg;
339 } else {
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400340 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 qc->n_elem = 1;
342 }
343 } else {
344 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
345 done(cmd);
346 }
347
348 return qc;
349}
350
351/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400352 * ata_dump_status - user friendly display of error info
353 * @id: id of the port in question
354 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400356 * Decode and dump the ATA error/status registers for the user so
357 * that they have some idea what really happened at the non
358 * make-believe layer.
359 *
360 * LOCKING:
361 * inherited from caller
362 */
363void ata_dump_status(unsigned id, struct ata_taskfile *tf)
364{
365 u8 stat = tf->command, err = tf->feature;
366
367 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
368 if (stat & ATA_BUSY) {
369 printk("Busy }\n"); /* Data is not valid in this case */
370 } else {
371 if (stat & 0x40) printk("DriveReady ");
372 if (stat & 0x20) printk("DeviceFault ");
373 if (stat & 0x10) printk("SeekComplete ");
374 if (stat & 0x08) printk("DataRequest ");
375 if (stat & 0x04) printk("CorrectedError ");
376 if (stat & 0x02) printk("Index ");
377 if (stat & 0x01) printk("Error ");
378 printk("}\n");
379
380 if (err) {
381 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
382 if (err & 0x04) printk("DriveStatusError ");
383 if (err & 0x80) {
384 if (err & 0x04) printk("BadCRC ");
385 else printk("Sector ");
386 }
387 if (err & 0x40) printk("UncorrectableError ");
388 if (err & 0x10) printk("SectorIdNotFound ");
389 if (err & 0x02) printk("TrackZeroNotFound ");
390 if (err & 0x01) printk("AddrMarkNotFound ");
391 printk("}\n");
392 }
393 }
394}
395
Jens Axboe9b847542006-01-06 09:28:07 +0100396int ata_scsi_device_resume(struct scsi_device *sdev)
397{
398 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
399 struct ata_device *dev = &ap->device[sdev->id];
400
401 return ata_device_resume(ap, dev);
402}
403
Nigel Cunningham082776e2006-03-23 23:22:16 +1000404int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
Jens Axboe9b847542006-01-06 09:28:07 +0100405{
406 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
407 struct ata_device *dev = &ap->device[sdev->id];
408
Nigel Cunningham082776e2006-03-23 23:22:16 +1000409 return ata_device_suspend(ap, dev, state);
Jens Axboe9b847542006-01-06 09:28:07 +0100410}
411
Jeff Garzikb0955182005-05-12 15:45:22 -0400412/**
413 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800414 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400415 * @drv_stat: value contained in ATA status register
416 * @drv_err: value contained in ATA error register
417 * @sk: the sense key we'll fill out
418 * @asc: the additional sense code we'll fill out
419 * @ascq: the additional sense code qualifier we'll fill out
420 *
421 * Converts an ATA error into a SCSI error. Fill out pointers to
422 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
423 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 *
425 * LOCKING:
426 * spin_lock_irqsave(host_set lock)
427 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500428void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
Jeff Garzikb0955182005-05-12 15:45:22 -0400429 u8 *ascq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
Jeff Garzikb0955182005-05-12 15:45:22 -0400431 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100434 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 /* BBD|ECC|ID|MAR */
436 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
437 /* BBD|ECC|ID */
438 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
439 /* ECC|MC|MARK */
440 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
441 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
442 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
443 /* MC|ID|ABRT|TRK0|MARK */
444 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
445 /* MCR|MARK */
446 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
447 /* Bad address mark */
448 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
449 /* TRK0 */
450 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
451 /* Abort & !ICRC */
452 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
453 /* Media change request */
454 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
455 /* SRV */
456 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
457 /* Media change */
458 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
459 /* ECC */
460 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
461 /* BBD - block marked bad */
462 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
463 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
464 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100465 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 /* Must be first because BUSY means no other bits valid */
467 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
468 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
469 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
470 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
471 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
472 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 /*
475 * Is this an error we can process/parse
476 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400477 if (drv_stat & ATA_BUSY) {
478 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Jeff Garzikb0955182005-05-12 15:45:22 -0400481 if (drv_err) {
482 /* Look for drv_err */
483 for (i = 0; sense_table[i][0] != 0xFF; i++) {
484 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500485 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400486 sense_table[i][0]) {
487 *sk = sense_table[i][1];
488 *asc = sense_table[i][2];
489 *ascq = sense_table[i][3];
490 goto translate_done;
491 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400493 /* No immediate match */
494 printk(KERN_WARNING "ata%u: no sense translation for "
495 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 }
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400499 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400507 /* No error? Undecoded? */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500508 printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
Jeff Garzikb0955182005-05-12 15:45:22 -0400509 id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Alan Cox2d202022006-03-21 15:53:46 +0000511 /* We need a sensible error return here, which is tricky, and one
512 that won't cause people to do things like return a disk wrongly */
513 *sk = ABORTED_COMMAND;
514 *asc = 0x00;
515 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400516
517 translate_done:
518 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
519 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
520 *sk, *asc, *ascq);
521 return;
522}
523
524/*
525 * ata_gen_ata_desc_sense - Generate check condition sense block.
526 * @qc: Command that completed.
527 *
528 * This function is specific to the ATA descriptor format sense
529 * block specified for the ATA pass through commands. Regardless
530 * of whether the command errored or not, return a sense
531 * block. Copy all controller registers into the sense
532 * block. Clear sense key, ASC & ASCQ if there is no error.
533 *
534 * LOCKING:
535 * spin_lock_irqsave(host_set lock)
536 */
537void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
538{
539 struct scsi_cmnd *cmd = qc->scsicmd;
540 struct ata_taskfile *tf = &qc->tf;
541 unsigned char *sb = cmd->sense_buffer;
542 unsigned char *desc = sb + 8;
543
544 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
545
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400546 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400547
548 /*
549 * Read the controller registers.
550 */
Tejun Heoa4631472006-02-11 19:11:13 +0900551 WARN_ON(qc->ap->ops->tf_read == NULL);
Jeff Garzikb0955182005-05-12 15:45:22 -0400552 qc->ap->ops->tf_read(qc->ap, tf);
553
554 /*
555 * Use ata_to_sense_error() to map status register bits
556 * onto sense key, asc & ascq.
557 */
Jeff Garzika7dac442005-10-30 04:44:42 -0500558 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400559 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
560 &sb[1], &sb[2], &sb[3]);
561 sb[1] &= 0x0f;
562 }
563
564 /*
565 * Sense data is current and format is descriptor.
566 */
567 sb[0] = 0x72;
568
569 desc[0] = 0x09;
570
571 /*
572 * Set length of additional sense data.
573 * Since we only populate descriptor 0, the total
574 * length is the same (fixed) length as descriptor 0.
575 */
576 desc[1] = sb[7] = 14;
577
578 /*
579 * Copy registers into sense buffer.
580 */
581 desc[2] = 0x00;
582 desc[3] = tf->feature; /* == error reg */
583 desc[5] = tf->nsect;
584 desc[7] = tf->lbal;
585 desc[9] = tf->lbam;
586 desc[11] = tf->lbah;
587 desc[12] = tf->device;
588 desc[13] = tf->command; /* == status reg */
589
590 /*
591 * Fill in Extend bit, and the high order bytes
592 * if applicable.
593 */
594 if (tf->flags & ATA_TFLAG_LBA48) {
595 desc[2] |= 0x01;
596 desc[4] = tf->hob_nsect;
597 desc[6] = tf->hob_lbal;
598 desc[8] = tf->hob_lbam;
599 desc[10] = tf->hob_lbah;
600 }
601}
602
603/**
604 * ata_gen_fixed_sense - generate a SCSI fixed sense block
605 * @qc: Command that we are erroring out
606 *
607 * Leverage ata_to_sense_error() to give us the codes. Fit our
608 * LBA in here if there's room.
609 *
610 * LOCKING:
611 * inherited from caller
612 */
613void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
614{
615 struct scsi_cmnd *cmd = qc->scsicmd;
616 struct ata_taskfile *tf = &qc->tf;
617 unsigned char *sb = cmd->sense_buffer;
618
619 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
620
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400621 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400622
623 /*
624 * Read the controller registers.
625 */
Tejun Heoa4631472006-02-11 19:11:13 +0900626 WARN_ON(qc->ap->ops->tf_read == NULL);
Jeff Garzikb0955182005-05-12 15:45:22 -0400627 qc->ap->ops->tf_read(qc->ap, tf);
628
629 /*
630 * Use ata_to_sense_error() to map status register bits
631 * onto sense key, asc & ascq.
632 */
Jeff Garzika7dac442005-10-30 04:44:42 -0500633 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400634 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
635 &sb[2], &sb[12], &sb[13]);
636 sb[2] &= 0x0f;
637 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639 sb[0] = 0x70;
Jeff Garzikb0955182005-05-12 15:45:22 -0400640 sb[7] = 0x0a;
Jeff Garzik0274aa22005-06-22 13:50:56 -0400641
Jeff Garzika7dac442005-10-30 04:44:42 -0500642 if (tf->flags & ATA_TFLAG_LBA48) {
643 /* TODO: find solution for LBA48 descriptors */
644 }
645
646 else if (tf->flags & ATA_TFLAG_LBA) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400647 /* A small (28b) LBA will fit in the 32b info field */
648 sb[0] |= 0x80; /* set valid bit */
649 sb[3] = tf->device & 0x0f;
650 sb[4] = tf->lbah;
651 sb[5] = tf->lbam;
652 sb[6] = tf->lbal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 }
Jeff Garzika7dac442005-10-30 04:44:42 -0500654
655 else {
656 /* TODO: C/H/S */
657 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
659
Brian Kinga6cce2a2006-03-17 17:04:15 -0600660static void ata_scsi_sdev_config(struct scsi_device *sdev)
661{
662 sdev->use_10_for_rw = 1;
663 sdev->use_10_for_ms = 1;
664}
665
666static void ata_scsi_dev_config(struct scsi_device *sdev,
667 struct ata_device *dev)
668{
669 unsigned int max_sectors;
670
671 /* TODO: 2048 is an arbitrary number, not the
672 * hardware maximum. This should be increased to
673 * 65534 when Jens Axboe's patch for dynamically
674 * determining max_sectors is merged.
675 */
676 max_sectors = ATA_MAX_SECTORS;
677 if (dev->flags & ATA_DFLAG_LBA48)
678 max_sectors = 2048;
679 if (dev->max_sectors)
680 max_sectors = dev->max_sectors;
681
682 blk_queue_max_sectors(sdev->request_queue, max_sectors);
683
684 /*
685 * SATA DMA transfers must be multiples of 4 byte, so
686 * we need to pad ATAPI transfers using an extra sg.
687 * Decrement max hw segments accordingly.
688 */
689 if (dev->class == ATA_DEV_ATAPI) {
690 request_queue_t *q = sdev->request_queue;
691 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
692 }
693}
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695/**
696 * ata_scsi_slave_config - Set SCSI device attributes
697 * @sdev: SCSI device to examine
698 *
699 * This is called before we actually start reading
700 * and writing to the device, to configure certain
701 * SCSI mid-layer behaviors.
702 *
703 * LOCKING:
704 * Defined by SCSI layer. We don't really care.
705 */
706
707int ata_scsi_slave_config(struct scsi_device *sdev)
708{
Brian Kinga6cce2a2006-03-17 17:04:15 -0600709 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
711 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
712
713 if (sdev->id < ATA_MAX_DEVICES) {
714 struct ata_port *ap;
715 struct ata_device *dev;
716
717 ap = (struct ata_port *) &sdev->host->hostdata[0];
718 dev = &ap->device[sdev->id];
719
Brian Kinga6cce2a2006-03-17 17:04:15 -0600720 ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 }
722
723 return 0; /* scsi layer doesn't check return value, sigh */
724}
725
726/**
Tejun Heof29841e2006-02-10 15:10:48 +0900727 * ata_scsi_timed_out - SCSI layer time out callback
728 * @cmd: timed out SCSI command
729 *
730 * Handles SCSI layer timeout. We race with normal completion of
731 * the qc for @cmd. If the qc is already gone, we lose and let
732 * the scsi command finish (EH_HANDLED). Otherwise, the qc has
733 * timed out and EH should be invoked. Prevent ata_qc_complete()
734 * from finishing it by setting EH_SCHEDULED and return
735 * EH_NOT_HANDLED.
736 *
737 * LOCKING:
738 * Called from timer context
739 *
740 * RETURNS:
741 * EH_HANDLED or EH_NOT_HANDLED
742 */
743enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
744{
745 struct Scsi_Host *host = cmd->device->host;
746 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
747 unsigned long flags;
748 struct ata_queued_cmd *qc;
749 enum scsi_eh_timer_return ret = EH_HANDLED;
750
751 DPRINTK("ENTER\n");
752
753 spin_lock_irqsave(&ap->host_set->lock, flags);
754 qc = ata_qc_from_tag(ap, ap->active_tag);
755 if (qc) {
Tejun Heoa4631472006-02-11 19:11:13 +0900756 WARN_ON(qc->scsicmd != cmd);
Tejun Heof29841e2006-02-10 15:10:48 +0900757 qc->flags |= ATA_QCFLAG_EH_SCHEDULED;
758 qc->err_mask |= AC_ERR_TIMEOUT;
759 ret = EH_NOT_HANDLED;
760 }
761 spin_unlock_irqrestore(&ap->host_set->lock, flags);
762
763 DPRINTK("EXIT, ret=%d\n", ret);
764 return ret;
765}
766
767/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 * ata_scsi_error - SCSI layer error handler callback
769 * @host: SCSI host on which error occurred
770 *
771 * Handles SCSI-layer-thrown error events.
772 *
773 * LOCKING:
774 * Inherited from SCSI layer (none, can sleep)
775 *
776 * RETURNS:
777 * Zero.
778 */
779
780int ata_scsi_error(struct Scsi_Host *host)
781{
782 struct ata_port *ap;
Jeff Garzik51407882006-02-09 01:56:05 -0500783 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785 DPRINTK("ENTER\n");
786
Jeff Garzik51407882006-02-09 01:56:05 -0500787 ap = (struct ata_port *) &host->hostdata[0];
788
Tejun Heodde44582006-02-02 00:56:10 +0900789 spin_lock_irqsave(&ap->host_set->lock, flags);
Tejun Heoa4631472006-02-11 19:11:13 +0900790 WARN_ON(ap->flags & ATA_FLAG_IN_EH);
Tejun Heodde44582006-02-02 00:56:10 +0900791 ap->flags |= ATA_FLAG_IN_EH;
Tejun Heoa4631472006-02-11 19:11:13 +0900792 WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
Tejun Heodde44582006-02-02 00:56:10 +0900793 spin_unlock_irqrestore(&ap->host_set->lock, flags);
794
Tejun Heo86e45b62006-03-05 15:29:09 +0900795 ata_port_flush_task(ap);
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 ap->ops->eng_timeout(ap);
798
Tejun Heoa4631472006-02-11 19:11:13 +0900799 WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q));
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900800
801 scsi_eh_flush_done_q(&ap->eh_done_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Tejun Heodde44582006-02-02 00:56:10 +0900803 spin_lock_irqsave(&ap->host_set->lock, flags);
804 ap->flags &= ~ATA_FLAG_IN_EH;
805 spin_unlock_irqrestore(&ap->host_set->lock, flags);
806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 DPRINTK("EXIT\n");
808 return 0;
809}
810
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900811static void ata_eh_scsidone(struct scsi_cmnd *scmd)
812{
813 /* nada */
814}
815
816static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
817{
818 struct ata_port *ap = qc->ap;
819 struct scsi_cmnd *scmd = qc->scsicmd;
820 unsigned long flags;
821
822 spin_lock_irqsave(&ap->host_set->lock, flags);
823 qc->scsidone = ata_eh_scsidone;
Tejun Heo341963b2006-02-10 15:10:48 +0900824 __ata_qc_complete(qc);
Tejun Heoa4631472006-02-11 19:11:13 +0900825 WARN_ON(ata_tag_valid(qc->tag));
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900826 spin_unlock_irqrestore(&ap->host_set->lock, flags);
827
828 scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
829}
830
831/**
832 * ata_eh_qc_complete - Complete an active ATA command from EH
833 * @qc: Command to complete
834 *
835 * Indicate to the mid and upper layers that an ATA command has
836 * completed. To be used from EH.
837 */
838void ata_eh_qc_complete(struct ata_queued_cmd *qc)
839{
840 struct scsi_cmnd *scmd = qc->scsicmd;
841 scmd->retries = scmd->allowed;
842 __ata_eh_qc_complete(qc);
843}
844
845/**
846 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
847 * @qc: Command to retry
848 *
849 * Indicate to the mid and upper layers that an ATA command
850 * should be retried. To be used from EH.
851 *
852 * SCSI midlayer limits the number of retries to scmd->allowed.
853 * This function might need to adjust scmd->retries for commands
854 * which get retried due to unrelated NCQ failures.
855 */
856void ata_eh_qc_retry(struct ata_queued_cmd *qc)
857{
858 __ata_eh_qc_complete(qc);
859}
860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400862 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
863 * @qc: Storage for translated ATA taskfile
864 * @scsicmd: SCSI command to translate
865 *
866 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
867 * (to start). Perhaps these commands should be preceded by
868 * CHECK POWER MODE to see what power mode the device is already in.
869 * [See SAT revision 5 at www.t10.org]
870 *
871 * LOCKING:
872 * spin_lock_irqsave(host_set lock)
873 *
874 * RETURNS:
875 * Zero on success, non-zero on error.
876 */
877
878static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
Jeff Garzik057ace52005-10-22 14:27:05 -0400879 const u8 *scsicmd)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400880{
881 struct ata_taskfile *tf = &qc->tf;
882
883 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
884 tf->protocol = ATA_PROT_NODATA;
885 if (scsicmd[1] & 0x1) {
886 ; /* ignore IMMED bit, violates sat-r05 */
887 }
888 if (scsicmd[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -0400889 goto invalid_fld; /* LOEJ bit set not supported */
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400890 if (((scsicmd[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -0400891 goto invalid_fld; /* power conditions not supported */
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400892 if (scsicmd[4] & 0x1) {
893 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -0400894
895 if (qc->dev->flags & ATA_DFLAG_LBA) {
896 qc->tf.flags |= ATA_TFLAG_LBA;
897
898 tf->lbah = 0x0;
899 tf->lbam = 0x0;
900 tf->lbal = 0x0;
901 tf->device |= ATA_LBA;
902 } else {
903 /* CHS */
904 tf->lbal = 0x1; /* sect */
905 tf->lbam = 0x0; /* cyl low */
906 tf->lbah = 0x0; /* cyl high */
907 }
908
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400909 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
910 } else {
911 tf->nsect = 0; /* time period value (0 implies now) */
912 tf->command = ATA_CMD_STANDBY;
913 /* Consider: ATA STANDBY IMMEDIATE command */
914 }
915 /*
916 * Standby and Idle condition timers could be implemented but that
917 * would require libata to implement the Power condition mode page
918 * and allow the user to change it. Changing mode pages requires
919 * MODE SELECT to be implemented.
920 */
921
922 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -0400923
924invalid_fld:
925 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
926 /* "Invalid field in cbd" */
927 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400928}
929
930
931/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
933 * @qc: Storage for translated ATA taskfile
934 * @scsicmd: SCSI command to translate (ignored)
935 *
936 * Sets up an ATA taskfile to issue FLUSH CACHE or
937 * FLUSH CACHE EXT.
938 *
939 * LOCKING:
940 * spin_lock_irqsave(host_set lock)
941 *
942 * RETURNS:
943 * Zero on success, non-zero on error.
944 */
945
Jeff Garzik057ace52005-10-22 14:27:05 -0400946static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947{
948 struct ata_taskfile *tf = &qc->tf;
949
950 tf->flags |= ATA_TFLAG_DEVICE;
951 tf->protocol = ATA_PROT_NODATA;
952
Albert Lee07506692005-10-12 15:04:18 +0800953 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 (ata_id_has_flush_ext(qc->dev->id)))
955 tf->command = ATA_CMD_FLUSH_EXT;
956 else
957 tf->command = ATA_CMD_FLUSH;
958
959 return 0;
960}
961
962/**
Albert Lee3aef5232005-10-04 08:47:43 -0400963 * scsi_6_lba_len - Get LBA and transfer length
964 * @scsicmd: SCSI command to translate
965 *
966 * Calculate LBA and transfer length for 6-byte commands.
967 *
968 * RETURNS:
969 * @plba: the LBA
970 * @plen: the transfer length
971 */
972
Jeff Garzik057ace52005-10-22 14:27:05 -0400973static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -0400974{
975 u64 lba = 0;
976 u32 len = 0;
977
978 VPRINTK("six-byte command\n");
979
980 lba |= ((u64)scsicmd[2]) << 8;
981 lba |= ((u64)scsicmd[3]);
982
983 len |= ((u32)scsicmd[4]);
984
985 *plba = lba;
986 *plen = len;
987}
988
989/**
990 * scsi_10_lba_len - Get LBA and transfer length
991 * @scsicmd: SCSI command to translate
992 *
993 * Calculate LBA and transfer length for 10-byte commands.
994 *
995 * RETURNS:
996 * @plba: the LBA
997 * @plen: the transfer length
998 */
999
Jeff Garzik057ace52005-10-22 14:27:05 -04001000static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001001{
1002 u64 lba = 0;
1003 u32 len = 0;
1004
1005 VPRINTK("ten-byte command\n");
1006
1007 lba |= ((u64)scsicmd[2]) << 24;
1008 lba |= ((u64)scsicmd[3]) << 16;
1009 lba |= ((u64)scsicmd[4]) << 8;
1010 lba |= ((u64)scsicmd[5]);
1011
1012 len |= ((u32)scsicmd[7]) << 8;
1013 len |= ((u32)scsicmd[8]);
1014
1015 *plba = lba;
1016 *plen = len;
1017}
1018
1019/**
1020 * scsi_16_lba_len - Get LBA and transfer length
1021 * @scsicmd: SCSI command to translate
1022 *
1023 * Calculate LBA and transfer length for 16-byte commands.
1024 *
1025 * RETURNS:
1026 * @plba: the LBA
1027 * @plen: the transfer length
1028 */
1029
Jeff Garzik057ace52005-10-22 14:27:05 -04001030static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001031{
1032 u64 lba = 0;
1033 u32 len = 0;
1034
1035 VPRINTK("sixteen-byte command\n");
1036
1037 lba |= ((u64)scsicmd[2]) << 56;
1038 lba |= ((u64)scsicmd[3]) << 48;
1039 lba |= ((u64)scsicmd[4]) << 40;
1040 lba |= ((u64)scsicmd[5]) << 32;
1041 lba |= ((u64)scsicmd[6]) << 24;
1042 lba |= ((u64)scsicmd[7]) << 16;
1043 lba |= ((u64)scsicmd[8]) << 8;
1044 lba |= ((u64)scsicmd[9]);
1045
1046 len |= ((u32)scsicmd[10]) << 24;
1047 len |= ((u32)scsicmd[11]) << 16;
1048 len |= ((u32)scsicmd[12]) << 8;
1049 len |= ((u32)scsicmd[13]);
1050
1051 *plba = lba;
1052 *plen = len;
1053}
1054
1055/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1057 * @qc: Storage for translated ATA taskfile
1058 * @scsicmd: SCSI command to translate
1059 *
1060 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1061 *
1062 * LOCKING:
1063 * spin_lock_irqsave(host_set lock)
1064 *
1065 * RETURNS:
1066 * Zero on success, non-zero on error.
1067 */
1068
Jeff Garzik057ace52005-10-22 14:27:05 -04001069static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070{
1071 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001072 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 u64 dev_sectors = qc->dev->n_sectors;
Albert Lee3aef5232005-10-04 08:47:43 -04001074 u64 block;
1075 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076
1077 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1078 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
Albert Lee3aef5232005-10-04 08:47:43 -04001080 if (scsicmd[0] == VERIFY)
1081 scsi_10_lba_len(scsicmd, &block, &n_block);
1082 else if (scsicmd[0] == VERIFY_16)
1083 scsi_16_lba_len(scsicmd, &block, &n_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 else
Douglas Gilbertae006512005-10-09 09:09:35 -04001085 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Albert Lee8bf62ec2005-05-12 15:29:42 -04001087 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001088 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001089 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001090 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001091 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001092 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
Albert Lee07506692005-10-12 15:04:18 +08001094 if (dev->flags & ATA_DFLAG_LBA) {
1095 tf->flags |= ATA_TFLAG_LBA;
1096
Albert Leec6a33e22005-10-12 15:12:26 +08001097 if (lba_28_ok(block, n_block)) {
1098 /* use LBA28 */
1099 tf->command = ATA_CMD_VERIFY;
1100 tf->device |= (block >> 24) & 0xf;
1101 } else if (lba_48_ok(block, n_block)) {
1102 if (!(dev->flags & ATA_DFLAG_LBA48))
1103 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001104
1105 /* use LBA48 */
1106 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001107 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
Albert Lee8bf62ec2005-05-12 15:29:42 -04001109 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Albert Lee8bf62ec2005-05-12 15:29:42 -04001111 tf->hob_lbah = (block >> 40) & 0xff;
1112 tf->hob_lbam = (block >> 32) & 0xff;
1113 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001114 } else
1115 /* request too large even for LBA48 */
1116 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001117
1118 tf->nsect = n_block & 0xff;
1119
1120 tf->lbah = (block >> 16) & 0xff;
1121 tf->lbam = (block >> 8) & 0xff;
1122 tf->lbal = block & 0xff;
1123
1124 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001126 /* CHS */
1127 u32 sect, head, cyl, track;
1128
Albert Leec6a33e22005-10-12 15:12:26 +08001129 if (!lba_28_ok(block, n_block))
1130 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001131
Albert Lee8bf62ec2005-05-12 15:29:42 -04001132 /* Convert LBA to CHS */
1133 track = (u32)block / dev->sectors;
1134 cyl = track / dev->heads;
1135 head = track % dev->heads;
1136 sect = (u32)block % dev->sectors + 1;
1137
Albert Leec187c4b2005-10-04 08:46:51 -04001138 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1139 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001140
1141 /* Check whether the converted CHS can fit.
1142 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001143 Head: 0-15
1144 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001145 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001146 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001147
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001149 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1150 tf->lbal = sect;
1151 tf->lbam = cyl;
1152 tf->lbah = cyl >> 8;
1153 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 }
1155
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001157
1158invalid_fld:
1159 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1160 /* "Invalid field in cbd" */
1161 return 1;
1162
1163out_of_range:
1164 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1165 /* "Logical Block Address out of range" */
1166 return 1;
1167
1168nothing_to_do:
1169 qc->scsicmd->result = SAM_STAT_GOOD;
1170 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171}
1172
1173/**
1174 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1175 * @qc: Storage for translated ATA taskfile
1176 * @scsicmd: SCSI command to translate
1177 *
1178 * Converts any of six SCSI read/write commands into the
1179 * ATA counterpart, including starting sector (LBA),
1180 * sector count, and taking into account the device's LBA48
1181 * support.
1182 *
1183 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1184 * %WRITE_16 are currently supported.
1185 *
1186 * LOCKING:
1187 * spin_lock_irqsave(host_set lock)
1188 *
1189 * RETURNS:
1190 * Zero on success, non-zero on error.
1191 */
1192
Jeff Garzik057ace52005-10-22 14:27:05 -04001193static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194{
1195 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001196 struct ata_device *dev = qc->dev;
Albert Lee3aef5232005-10-04 08:47:43 -04001197 u64 block;
1198 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
1200 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
Albert Lee8cbd6df2005-10-12 15:06:27 +08001202 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1203 scsicmd[0] == WRITE_16)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 tf->flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001206 /* Calculate the SCSI LBA, transfer length and FUA. */
Albert Lee3aef5232005-10-04 08:47:43 -04001207 switch (scsicmd[0]) {
1208 case READ_10:
1209 case WRITE_10:
1210 scsi_10_lba_len(scsicmd, &block, &n_block);
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001211 if (unlikely(scsicmd[1] & (1 << 3)))
1212 tf->flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001213 break;
1214 case READ_6:
1215 case WRITE_6:
1216 scsi_6_lba_len(scsicmd, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001217
1218 /* for 6-byte r/w commands, transfer length 0
1219 * means 256 blocks of data, not 0 block.
1220 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001221 if (!n_block)
1222 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001223 break;
1224 case READ_16:
1225 case WRITE_16:
1226 scsi_16_lba_len(scsicmd, &block, &n_block);
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001227 if (unlikely(scsicmd[1] & (1 << 3)))
1228 tf->flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001229 break;
1230 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001231 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001232 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 }
1234
Albert Lee8bf62ec2005-05-12 15:29:42 -04001235 /* Check and compose ATA command */
1236 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001237 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1238 * length 0 means transfer 0 block of data.
1239 * However, for ATA R/W commands, sector count 0 means
1240 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001241 *
1242 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001243 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001244 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001245
Albert Lee07506692005-10-12 15:04:18 +08001246 if (dev->flags & ATA_DFLAG_LBA) {
1247 tf->flags |= ATA_TFLAG_LBA;
1248
Albert Leec6a33e22005-10-12 15:12:26 +08001249 if (lba_28_ok(block, n_block)) {
1250 /* use LBA28 */
1251 tf->device |= (block >> 24) & 0xf;
1252 } else if (lba_48_ok(block, n_block)) {
1253 if (!(dev->flags & ATA_DFLAG_LBA48))
Douglas Gilbertae006512005-10-09 09:09:35 -04001254 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001255
Albert Lee07506692005-10-12 15:04:18 +08001256 /* use LBA48 */
1257 tf->flags |= ATA_TFLAG_LBA48;
1258
Albert Lee8bf62ec2005-05-12 15:29:42 -04001259 tf->hob_nsect = (n_block >> 8) & 0xff;
1260
1261 tf->hob_lbah = (block >> 40) & 0xff;
1262 tf->hob_lbam = (block >> 32) & 0xff;
1263 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001264 } else
1265 /* request too large even for LBA48 */
1266 goto out_of_range;
Albert Leec187c4b2005-10-04 08:46:51 -04001267
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001268 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1269 goto invalid_fld;
Albert Lee8cbd6df2005-10-12 15:06:27 +08001270
Albert Lee8bf62ec2005-05-12 15:29:42 -04001271 qc->nsect = n_block;
1272 tf->nsect = n_block & 0xff;
1273
1274 tf->lbah = (block >> 16) & 0xff;
1275 tf->lbam = (block >> 8) & 0xff;
1276 tf->lbal = block & 0xff;
1277
1278 tf->device |= ATA_LBA;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001279 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001280 /* CHS */
1281 u32 sect, head, cyl, track;
1282
1283 /* The request -may- be too large for CHS addressing. */
Albert Leec6a33e22005-10-12 15:12:26 +08001284 if (!lba_28_ok(block, n_block))
Douglas Gilbertae006512005-10-09 09:09:35 -04001285 goto out_of_range;
Albert Leec187c4b2005-10-04 08:46:51 -04001286
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001287 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1288 goto invalid_fld;
Albert Lee8cbd6df2005-10-12 15:06:27 +08001289
Albert Lee8bf62ec2005-05-12 15:29:42 -04001290 /* Convert LBA to CHS */
1291 track = (u32)block / dev->sectors;
1292 cyl = track / dev->heads;
1293 head = track % dev->heads;
1294 sect = (u32)block % dev->sectors + 1;
1295
Albert Leec187c4b2005-10-04 08:46:51 -04001296 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
Albert Lee8bf62ec2005-05-12 15:29:42 -04001297 (u32)block, track, cyl, head, sect);
Albert Leec187c4b2005-10-04 08:46:51 -04001298
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001299 /* Check whether the converted CHS can fit.
1300 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001301 Head: 0-15
1302 Sector: 1-255*/
Albert Leec187c4b2005-10-04 08:46:51 -04001303 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001304 goto out_of_range;
Albert Leec187c4b2005-10-04 08:46:51 -04001305
Albert Lee8bf62ec2005-05-12 15:29:42 -04001306 qc->nsect = n_block;
1307 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1308 tf->lbal = sect;
1309 tf->lbam = cyl;
1310 tf->lbah = cyl >> 8;
1311 tf->device |= head;
1312 }
1313
1314 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001315
1316invalid_fld:
1317 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1318 /* "Invalid field in cbd" */
1319 return 1;
1320
1321out_of_range:
1322 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1323 /* "Logical Block Address out of range" */
1324 return 1;
1325
1326nothing_to_do:
1327 qc->scsicmd->result = SAM_STAT_GOOD;
1328 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329}
1330
Tejun Heo77853bf2006-01-23 13:09:36 +09001331static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332{
1333 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001334 u8 *cdb = cmd->cmnd;
Albert Leea22e2eb2005-12-05 15:38:02 +08001335 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Jeff Garzikb0955182005-05-12 15:45:22 -04001337 /* For ATA pass thru (SAT) commands, generate a sense block if
1338 * user mandated it or if there's an error. Note that if we
1339 * generate because the user forced us to, a check condition
1340 * is generated and the ATA register values are returned
1341 * whether the command completed successfully or not. If there
1342 * was no error, SK, ASC and ASCQ will all be zero.
1343 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001344 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1345 ((cdb[2] & 0x20) || need_sense)) {
Jeff Garzikb0955182005-05-12 15:45:22 -04001346 ata_gen_ata_desc_sense(qc);
1347 } else {
1348 if (!need_sense) {
1349 cmd->result = SAM_STAT_GOOD;
1350 } else {
1351 /* TODO: decide which descriptor format to use
1352 * for 48b LBA devices and call that here
1353 * instead of the fixed desc, which is only
1354 * good for smaller LBA (and maybe CHS?)
1355 * devices.
1356 */
1357 ata_gen_fixed_sense(qc);
1358 }
1359 }
1360
1361 if (need_sense) {
1362 /* The ata_gen_..._sense routines fill in tf */
1363 ata_dump_status(qc->ap->id, &qc->tf);
1364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
1366 qc->scsidone(cmd);
1367
Tejun Heo77853bf2006-01-23 13:09:36 +09001368 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369}
1370
1371/**
1372 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1373 * @ap: ATA port to which the command is addressed
1374 * @dev: ATA device to which the command is addressed
1375 * @cmd: SCSI command to execute
1376 * @done: SCSI command completion function
1377 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1378 *
1379 * Our ->queuecommand() function has decided that the SCSI
1380 * command issued can be directly translated into an ATA
1381 * command, rather than handled internally.
1382 *
1383 * This function sets up an ata_queued_cmd structure for the
1384 * SCSI command, and sends that ata_queued_cmd to the hardware.
1385 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001386 * The xlat_func argument (actor) returns 0 if ready to execute
1387 * ATA command, else 1 to finish translation. If 1 is returned
1388 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1389 * to be set reflecting an error condition or clean (early)
1390 * termination.
1391 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 * LOCKING:
1393 * spin_lock_irqsave(host_set lock)
1394 */
1395
1396static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
1397 struct scsi_cmnd *cmd,
1398 void (*done)(struct scsi_cmnd *),
1399 ata_xlat_func_t xlat_func)
1400{
1401 struct ata_queued_cmd *qc;
1402 u8 *scsicmd = cmd->cmnd;
1403
1404 VPRINTK("ENTER\n");
1405
1406 qc = ata_scsi_qc_new(ap, dev, cmd, done);
1407 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001408 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
1410 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001411 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1412 cmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 if (unlikely(cmd->request_bufflen < 1)) {
1414 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
1415 ap->id, dev->devno);
Douglas Gilbertae006512005-10-09 09:09:35 -04001416 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 }
1418
1419 if (cmd->use_sg)
1420 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1421 else
1422 ata_sg_init_one(qc, cmd->request_buffer,
1423 cmd->request_bufflen);
1424
1425 qc->dma_dir = cmd->sc_data_direction;
1426 }
1427
1428 qc->complete_fn = ata_scsi_qc_complete;
1429
1430 if (xlat_func(qc, scsicmd))
Douglas Gilbertae006512005-10-09 09:09:35 -04001431 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
1433 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001434 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
1436 VPRINTK("EXIT\n");
1437 return;
1438
Douglas Gilbertae006512005-10-09 09:09:35 -04001439early_finish:
1440 ata_qc_free(qc);
1441 done(cmd);
1442 DPRINTK("EXIT - early finish (good or error)\n");
1443 return;
1444
1445err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001447err_mem:
1448 cmd->result = (DID_ERROR << 16);
1449 done(cmd);
1450 DPRINTK("EXIT - internal\n");
1451 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452}
1453
1454/**
1455 * ata_scsi_rbuf_get - Map response buffer.
1456 * @cmd: SCSI command containing buffer to be mapped.
1457 * @buf_out: Pointer to mapped area.
1458 *
1459 * Maps buffer contained within SCSI command @cmd.
1460 *
1461 * LOCKING:
1462 * spin_lock_irqsave(host_set lock)
1463 *
1464 * RETURNS:
1465 * Length of response buffer.
1466 */
1467
1468static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1469{
1470 u8 *buf;
1471 unsigned int buflen;
1472
1473 if (cmd->use_sg) {
1474 struct scatterlist *sg;
1475
1476 sg = (struct scatterlist *) cmd->request_buffer;
1477 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1478 buflen = sg->length;
1479 } else {
1480 buf = cmd->request_buffer;
1481 buflen = cmd->request_bufflen;
1482 }
1483
1484 *buf_out = buf;
1485 return buflen;
1486}
1487
1488/**
1489 * ata_scsi_rbuf_put - Unmap response buffer.
1490 * @cmd: SCSI command containing buffer to be unmapped.
1491 * @buf: buffer to unmap
1492 *
1493 * Unmaps response buffer contained within @cmd.
1494 *
1495 * LOCKING:
1496 * spin_lock_irqsave(host_set lock)
1497 */
1498
1499static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1500{
1501 if (cmd->use_sg) {
1502 struct scatterlist *sg;
1503
1504 sg = (struct scatterlist *) cmd->request_buffer;
1505 kunmap_atomic(buf - sg->offset, KM_USER0);
1506 }
1507}
1508
1509/**
1510 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1511 * @args: device IDENTIFY data / SCSI command of interest.
1512 * @actor: Callback hook for desired SCSI command simulator
1513 *
1514 * Takes care of the hard work of simulating a SCSI command...
1515 * Mapping the response buffer, calling the command's handler,
1516 * and handling the handler's return value. This return value
1517 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001518 * completed successfully (0), or not (in which case cmd->result
1519 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 *
1521 * LOCKING:
1522 * spin_lock_irqsave(host_set lock)
1523 */
1524
1525void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1526 unsigned int (*actor) (struct ata_scsi_args *args,
1527 u8 *rbuf, unsigned int buflen))
1528{
1529 u8 *rbuf;
1530 unsigned int buflen, rc;
1531 struct scsi_cmnd *cmd = args->cmd;
1532
1533 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1534 memset(rbuf, 0, buflen);
1535 rc = actor(args, rbuf, buflen);
1536 ata_scsi_rbuf_put(cmd, rbuf);
1537
Douglas Gilbertae006512005-10-09 09:09:35 -04001538 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001540 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541}
1542
1543/**
1544 * ata_scsiop_inq_std - Simulate INQUIRY command
1545 * @args: device IDENTIFY data / SCSI command of interest.
1546 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1547 * @buflen: Response buffer length.
1548 *
1549 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001550 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 *
1552 * LOCKING:
1553 * spin_lock_irqsave(host_set lock)
1554 */
1555
1556unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1557 unsigned int buflen)
1558{
1559 u8 hdr[] = {
1560 TYPE_DISK,
1561 0,
1562 0x5, /* claim SPC-3 version compatibility */
1563 2,
1564 95 - 4
1565 };
1566
1567 /* set scsi removeable (RMB) bit per ata bit */
1568 if (ata_id_removeable(args->id))
1569 hdr[1] |= (1 << 7);
1570
1571 VPRINTK("ENTER\n");
1572
1573 memcpy(rbuf, hdr, sizeof(hdr));
1574
1575 if (buflen > 35) {
1576 memcpy(&rbuf[8], "ATA ", 8);
Tejun Heo6a62a042006-02-13 10:02:46 +09001577 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1578 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 if (rbuf[32] == 0 || rbuf[32] == ' ')
1580 memcpy(&rbuf[32], "n/a ", 4);
1581 }
1582
1583 if (buflen > 63) {
1584 const u8 versions[] = {
1585 0x60, /* SAM-3 (no version claimed) */
1586
1587 0x03,
1588 0x20, /* SBC-2 (no version claimed) */
1589
1590 0x02,
1591 0x60 /* SPC-3 (no version claimed) */
1592 };
1593
1594 memcpy(rbuf + 59, versions, sizeof(versions));
1595 }
1596
1597 return 0;
1598}
1599
1600/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001601 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 * @args: device IDENTIFY data / SCSI command of interest.
1603 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1604 * @buflen: Response buffer length.
1605 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001606 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 *
1608 * LOCKING:
1609 * spin_lock_irqsave(host_set lock)
1610 */
1611
1612unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1613 unsigned int buflen)
1614{
1615 const u8 pages[] = {
1616 0x00, /* page 0x00, this page */
1617 0x80, /* page 0x80, unit serial no page */
1618 0x83 /* page 0x83, device ident page */
1619 };
Jeff Garzikb142eb62006-03-21 20:37:47 -05001620 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
1622 if (buflen > 6)
1623 memcpy(rbuf + 4, pages, sizeof(pages));
1624
1625 return 0;
1626}
1627
1628/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001629 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 * @args: device IDENTIFY data / SCSI command of interest.
1631 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1632 * @buflen: Response buffer length.
1633 *
1634 * Returns ATA device serial number.
1635 *
1636 * LOCKING:
1637 * spin_lock_irqsave(host_set lock)
1638 */
1639
1640unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1641 unsigned int buflen)
1642{
1643 const u8 hdr[] = {
1644 0,
1645 0x80, /* this page code */
1646 0,
1647 ATA_SERNO_LEN, /* page len */
1648 };
1649 memcpy(rbuf, hdr, sizeof(hdr));
1650
1651 if (buflen > (ATA_SERNO_LEN + 4 - 1))
Tejun Heo6a62a042006-02-13 10:02:46 +09001652 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1653 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654
1655 return 0;
1656}
1657
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001659 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 * @args: device IDENTIFY data / SCSI command of interest.
1661 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1662 * @buflen: Response buffer length.
1663 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001664 * Yields two logical unit device identification designators:
1665 * - vendor specific ASCII containing the ATA serial number
1666 * - SAT defined "t10 vendor id based" containing ASCII vendor
1667 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 *
1669 * LOCKING:
1670 * spin_lock_irqsave(host_set lock)
1671 */
1672
1673unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1674 unsigned int buflen)
1675{
Jeff Garzikb142eb62006-03-21 20:37:47 -05001676 int num;
1677 const int sat_model_serial_desc_len = 68;
1678 const int ata_model_byte_len = 40;
1679
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05001681 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682
Jeff Garzikb142eb62006-03-21 20:37:47 -05001683 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1684 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001685 rbuf[num + 0] = 2;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001686 rbuf[num + 3] = ATA_SERNO_LEN;
1687 num += 4;
1688 ata_id_string(args->id, (unsigned char *) rbuf + num,
1689 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1690 num += ATA_SERNO_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 }
Jeff Garzikb142eb62006-03-21 20:37:47 -05001692 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1693 /* SAT defined lu model and serial numbers descriptor */
1694 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001695 rbuf[num + 0] = 2;
1696 rbuf[num + 1] = 1;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001697 rbuf[num + 3] = sat_model_serial_desc_len;
1698 num += 4;
1699 memcpy(rbuf + num, "ATA ", 8);
1700 num += 8;
1701 ata_id_string(args->id, (unsigned char *) rbuf + num,
1702 ATA_ID_PROD_OFS, ata_model_byte_len);
1703 num += ata_model_byte_len;
1704 ata_id_string(args->id, (unsigned char *) rbuf + num,
1705 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1706 num += ATA_SERNO_LEN;
1707 }
1708 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 return 0;
1710}
1711
1712/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001713 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 * @args: device IDENTIFY data / SCSI command of interest.
1715 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1716 * @buflen: Response buffer length.
1717 *
1718 * No operation. Simply returns success to caller, to indicate
1719 * that the caller should successfully complete this SCSI command.
1720 *
1721 * LOCKING:
1722 * spin_lock_irqsave(host_set lock)
1723 */
1724
1725unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1726 unsigned int buflen)
1727{
1728 VPRINTK("ENTER\n");
1729 return 0;
1730}
1731
1732/**
1733 * ata_msense_push - Push data onto MODE SENSE data output buffer
1734 * @ptr_io: (input/output) Location to store more output data
1735 * @last: End of output data buffer
1736 * @buf: Pointer to BLOB being added to output buffer
1737 * @buflen: Length of BLOB
1738 *
1739 * Store MODE SENSE data on an output buffer.
1740 *
1741 * LOCKING:
1742 * None.
1743 */
1744
1745static void ata_msense_push(u8 **ptr_io, const u8 *last,
1746 const u8 *buf, unsigned int buflen)
1747{
1748 u8 *ptr = *ptr_io;
1749
1750 if ((ptr + buflen - 1) > last)
1751 return;
1752
1753 memcpy(ptr, buf, buflen);
1754
1755 ptr += buflen;
1756
1757 *ptr_io = ptr;
1758}
1759
1760/**
1761 * ata_msense_caching - Simulate MODE SENSE caching info page
1762 * @id: device IDENTIFY data
1763 * @ptr_io: (input/output) Location to store more output data
1764 * @last: End of output data buffer
1765 *
1766 * Generate a caching info page, which conditionally indicates
1767 * write caching to the SCSI layer, depending on device
1768 * capabilities.
1769 *
1770 * LOCKING:
1771 * None.
1772 */
1773
1774static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1775 const u8 *last)
1776{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001777 u8 page[CACHE_MPAGE_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001779 memcpy(page, def_cache_mpage, sizeof(page));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 if (ata_id_wcache_enabled(id))
1781 page[2] |= (1 << 2); /* write cache enable */
1782 if (!ata_id_rahead_enabled(id))
1783 page[12] |= (1 << 5); /* disable read ahead */
1784
1785 ata_msense_push(ptr_io, last, page, sizeof(page));
1786 return sizeof(page);
1787}
1788
1789/**
1790 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1791 * @dev: Device associated with this MODE SENSE command
1792 * @ptr_io: (input/output) Location to store more output data
1793 * @last: End of output data buffer
1794 *
1795 * Generate a generic MODE SENSE control mode page.
1796 *
1797 * LOCKING:
1798 * None.
1799 */
1800
1801static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1802{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001803 ata_msense_push(ptr_io, last, def_control_mpage,
1804 sizeof(def_control_mpage));
1805 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806}
1807
1808/**
1809 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1810 * @dev: Device associated with this MODE SENSE command
1811 * @ptr_io: (input/output) Location to store more output data
1812 * @last: End of output data buffer
1813 *
1814 * Generate a generic MODE SENSE r/w error recovery page.
1815 *
1816 * LOCKING:
1817 * None.
1818 */
1819
1820static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1821{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001823 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1824 sizeof(def_rw_recovery_mpage));
1825 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826}
1827
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001828/*
1829 * We can turn this into a real blacklist if it's needed, for now just
1830 * blacklist any Maxtor BANC1G10 revision firmware
1831 */
1832static int ata_dev_supports_fua(u16 *id)
1833{
1834 unsigned char model[41], fw[9];
1835
Jeff Garzikc3c013a2006-02-27 22:31:19 -05001836 if (!libata_fua)
1837 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001838 if (!ata_id_has_fua(id))
1839 return 0;
1840
Tejun Heo6a62a042006-02-13 10:02:46 +09001841 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1842 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001843
Tejun Heo2e026712006-02-12 22:47:04 +09001844 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001845 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09001846 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001847 return 1;
1848
1849 return 0; /* blacklisted */
1850}
1851
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852/**
1853 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1854 * @args: device IDENTIFY data / SCSI command of interest.
1855 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1856 * @buflen: Response buffer length.
1857 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001858 * Simulate MODE SENSE commands. Assume this is invoked for direct
1859 * access devices (e.g. disks) only. There should be no block
1860 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 *
1862 * LOCKING:
1863 * spin_lock_irqsave(host_set lock)
1864 */
1865
1866unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1867 unsigned int buflen)
1868{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001869 struct ata_device *dev = args->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 u8 *scsicmd = args->cmd->cmnd, *p, *last;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001871 const u8 sat_blk_desc[] = {
1872 0, 0, 0, 0, /* number of blocks: sat unspecified */
1873 0,
1874 0, 0x2, 0x0 /* block length: 512 bytes */
1875 };
1876 u8 pg, spg;
1877 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001878 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879
1880 VPRINTK("ENTER\n");
1881
1882 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001883 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1884 /*
1885 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001887
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04001889 switch (page_control) {
1890 case 0: /* current */
1891 break; /* supported */
1892 case 3: /* saved */
1893 goto saving_not_supp;
1894 case 1: /* changeable */
1895 case 2: /* defaults */
1896 default:
1897 goto invalid_fld;
1898 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001900 if (six_byte) {
1901 output_len = 4 + (ebd ? 8 : 0);
1902 alloc_len = scsicmd[4];
1903 } else {
1904 output_len = 8 + (ebd ? 8 : 0);
1905 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1906 }
1907 minlen = (alloc_len < buflen) ? alloc_len : buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
1909 p = rbuf + output_len;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001910 last = rbuf + minlen - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001912 pg = scsicmd[2] & 0x3f;
1913 spg = scsicmd[3];
1914 /*
1915 * No mode subpages supported (yet) but asking for _all_
1916 * subpages may be valid
1917 */
1918 if (spg && (spg != ALL_SUB_MPAGES))
1919 goto invalid_fld;
1920
1921 switch(pg) {
1922 case RW_RECOVERY_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 output_len += ata_msense_rw_recovery(&p, last);
1924 break;
1925
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001926 case CACHE_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 output_len += ata_msense_caching(args->id, &p, last);
1928 break;
1929
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001930 case CONTROL_MPAGE: {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 output_len += ata_msense_ctl_mode(&p, last);
1932 break;
1933 }
1934
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001935 case ALL_MPAGES:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 output_len += ata_msense_rw_recovery(&p, last);
1937 output_len += ata_msense_caching(args->id, &p, last);
1938 output_len += ata_msense_ctl_mode(&p, last);
1939 break;
1940
1941 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04001942 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 }
1944
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001945 if (minlen < 1)
1946 return 0;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001947
1948 dpofua = 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001949 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001950 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1951 dpofua = 1 << 4;
1952
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 if (six_byte) {
1954 output_len--;
1955 rbuf[0] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001956 if (minlen > 2)
1957 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001958 if (ebd) {
1959 if (minlen > 3)
1960 rbuf[3] = sizeof(sat_blk_desc);
1961 if (minlen > 11)
1962 memcpy(rbuf + 4, sat_blk_desc,
1963 sizeof(sat_blk_desc));
1964 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 } else {
1966 output_len -= 2;
1967 rbuf[0] = output_len >> 8;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001968 if (minlen > 1)
1969 rbuf[1] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001970 if (minlen > 3)
1971 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001972 if (ebd) {
1973 if (minlen > 7)
1974 rbuf[7] = sizeof(sat_blk_desc);
1975 if (minlen > 15)
1976 memcpy(rbuf + 8, sat_blk_desc,
1977 sizeof(sat_blk_desc));
1978 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001981
1982invalid_fld:
1983 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1984 /* "Invalid field in cbd" */
1985 return 1;
1986
1987saving_not_supp:
1988 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1989 /* "Saving parameters not supported" */
1990 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991}
1992
1993/**
1994 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1995 * @args: device IDENTIFY data / SCSI command of interest.
1996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1997 * @buflen: Response buffer length.
1998 *
1999 * Simulate READ CAPACITY commands.
2000 *
2001 * LOCKING:
2002 * spin_lock_irqsave(host_set lock)
2003 */
2004
2005unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2006 unsigned int buflen)
2007{
2008 u64 n_sectors;
2009 u32 tmp;
2010
2011 VPRINTK("ENTER\n");
2012
Albert Lee8bf62ec2005-05-12 15:29:42 -04002013 if (ata_id_has_lba(args->id)) {
2014 if (ata_id_has_lba48(args->id))
2015 n_sectors = ata_id_u64(args->id, 100);
2016 else
2017 n_sectors = ata_id_u32(args->id, 60);
2018 } else {
2019 /* CHS default translation */
2020 n_sectors = args->id[1] * args->id[3] * args->id[6];
2021
2022 if (ata_id_current_chs_valid(args->id))
2023 /* CHS current translation */
2024 n_sectors = ata_id_u32(args->id, 57);
2025 }
2026
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 n_sectors--; /* ATA TotalUserSectors - 1 */
2028
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Philip Pokorny0c144d02005-05-28 01:24:47 -07002030 if( n_sectors >= 0xffffffffULL )
2031 tmp = 0xffffffff ; /* Return max count on overflow */
2032 else
2033 tmp = n_sectors ;
2034
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 /* sector count, 32-bit */
2036 rbuf[0] = tmp >> (8 * 3);
2037 rbuf[1] = tmp >> (8 * 2);
2038 rbuf[2] = tmp >> (8 * 1);
2039 rbuf[3] = tmp;
2040
2041 /* sector size */
2042 tmp = ATA_SECT_SIZE;
2043 rbuf[6] = tmp >> 8;
2044 rbuf[7] = tmp;
2045
2046 } else {
2047 /* sector count, 64-bit */
Philip Pokorny0c144d02005-05-28 01:24:47 -07002048 tmp = n_sectors >> (8 * 4);
2049 rbuf[2] = tmp >> (8 * 3);
2050 rbuf[3] = tmp >> (8 * 2);
2051 rbuf[4] = tmp >> (8 * 1);
2052 rbuf[5] = tmp;
2053 tmp = n_sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 rbuf[6] = tmp >> (8 * 3);
2055 rbuf[7] = tmp >> (8 * 2);
2056 rbuf[8] = tmp >> (8 * 1);
2057 rbuf[9] = tmp;
2058
2059 /* sector size */
2060 tmp = ATA_SECT_SIZE;
2061 rbuf[12] = tmp >> 8;
2062 rbuf[13] = tmp;
2063 }
2064
2065 return 0;
2066}
2067
2068/**
2069 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2070 * @args: device IDENTIFY data / SCSI command of interest.
2071 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2072 * @buflen: Response buffer length.
2073 *
2074 * Simulate REPORT LUNS command.
2075 *
2076 * LOCKING:
2077 * spin_lock_irqsave(host_set lock)
2078 */
2079
2080unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2081 unsigned int buflen)
2082{
2083 VPRINTK("ENTER\n");
2084 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2085
2086 return 0;
2087}
2088
2089/**
Douglas Gilbert845c5832005-10-09 08:55:41 -04002090 * ata_scsi_set_sense - Set SCSI sense data and status
2091 * @cmd: SCSI request to be handled
2092 * @sk: SCSI-defined sense key
2093 * @asc: SCSI-defined additional sense code
2094 * @ascq: SCSI-defined additional sense code qualifier
2095 *
2096 * Helper function that builds a valid fixed format, current
2097 * response code and the given sense key (sk), additional sense
2098 * code (asc) and additional sense code qualifier (ascq) with
2099 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2100 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2101 *
2102 * LOCKING:
2103 * Not required
2104 */
2105
2106void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2107{
2108 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2109
2110 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2111 cmd->sense_buffer[2] = sk;
2112 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2113 cmd->sense_buffer[12] = asc;
2114 cmd->sense_buffer[13] = ascq;
2115}
2116
2117/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 * ata_scsi_badcmd - End a SCSI request with an error
2119 * @cmd: SCSI request to be handled
2120 * @done: SCSI command completion function
2121 * @asc: SCSI-defined additional sense code
2122 * @ascq: SCSI-defined additional sense code qualifier
2123 *
2124 * Helper function that completes a SCSI command with
2125 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2126 * and the specified additional sense codes.
2127 *
2128 * LOCKING:
2129 * spin_lock_irqsave(host_set lock)
2130 */
2131
2132void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2133{
2134 DPRINTK("ENTER\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04002135 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136
2137 done(cmd);
2138}
2139
Tejun Heo77853bf2006-01-23 13:09:36 +09002140static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002141{
Albert Leea22e2eb2005-12-05 15:38:02 +08002142 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002143 /* FIXME: not quite right; we don't want the
2144 * translation of taskfile registers into
2145 * a sense descriptors, since that's only
2146 * correct for ATA, not ATAPI
2147 */
2148 ata_gen_ata_desc_sense(qc);
2149
2150 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002151 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002152}
2153
2154/* is it pointless to prefer PIO for "safety reasons"? */
2155static inline int ata_pio_use_silly(struct ata_port *ap)
2156{
2157 return (ap->flags & ATA_FLAG_PIO_DMA);
2158}
2159
2160static void atapi_request_sense(struct ata_queued_cmd *qc)
2161{
2162 struct ata_port *ap = qc->ap;
2163 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002164
2165 DPRINTK("ATAPI request sense\n");
2166
Jeff Garzika939c962005-10-05 17:09:16 -04002167 /* FIXME: is this needed? */
2168 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2169
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002170 ap->ops->tf_read(ap, &qc->tf);
2171
2172 /* fill these in, for the case where they are -not- overwritten */
2173 cmd->sense_buffer[0] = 0x70;
2174 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2175
2176 ata_qc_reinit(qc);
2177
Jeff Garzika939c962005-10-05 17:09:16 -04002178 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2179 qc->dma_dir = DMA_FROM_DEVICE;
2180
Tejun Heo6e7846e2006-02-12 23:32:58 +09002181 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002182 qc->cdb[0] = REQUEST_SENSE;
2183 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2184
2185 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2186 qc->tf.command = ATA_CMD_PACKET;
2187
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002188 if (ata_pio_use_silly(ap)) {
2189 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2190 qc->tf.feature |= ATAPI_PKT_DMA;
2191 } else {
2192 qc->tf.protocol = ATA_PROT_ATAPI;
2193 qc->tf.lbam = (8 * 1024) & 0xff;
2194 qc->tf.lbah = (8 * 1024) >> 8;
2195 }
Jeff Garzika939c962005-10-05 17:09:16 -04002196 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2197
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002198 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002199
Tejun Heo8e0e6942006-03-31 20:41:11 +09002200 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002201
2202 DPRINTK("EXIT\n");
2203}
2204
Tejun Heo77853bf2006-01-23 13:09:36 +09002205static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206{
2207 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002208 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209
Jeff Garzika7dac442005-10-30 04:44:42 -05002210 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002211
Jeff Garzika7dac442005-10-30 04:44:42 -05002212 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002214 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002215 return;
Jeff Garzike12669e2005-10-05 18:39:23 -04002216 }
2217
Jeff Garzika7dac442005-10-30 04:44:42 -05002218 else if (unlikely(err_mask))
2219 /* FIXME: not quite right; we don't want the
2220 * translation of taskfile registers into
2221 * a sense descriptors, since that's only
2222 * correct for ATA, not ATAPI
2223 */
2224 ata_gen_ata_desc_sense(qc);
2225
Jeff Garzike12669e2005-10-05 18:39:23 -04002226 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227 u8 *scsicmd = cmd->cmnd;
2228
Tony Battersbyfd71da42005-12-21 16:35:44 -05002229 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 u8 *buf = NULL;
2231 unsigned int buflen;
2232
2233 buflen = ata_scsi_rbuf_get(cmd, &buf);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002234
2235 /* ATAPI devices typically report zero for their SCSI version,
2236 * and sometimes deviate from the spec WRT response data
2237 * format. If SCSI version is reported as zero like normal,
2238 * then we make the following fixups: 1) Fake MMC-5 version,
2239 * to indicate to the Linux scsi midlayer this is a modern
2240 * device. 2) Ensure response data format / ATAPI information
2241 * are always correct.
2242 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002243 if (buf[2] == 0) {
2244 buf[2] = 0x5;
2245 buf[3] = 0x32;
2246 }
2247
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248 ata_scsi_rbuf_put(cmd, buf);
2249 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002250
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 cmd->result = SAM_STAT_GOOD;
2252 }
2253
2254 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002255 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256}
2257/**
2258 * atapi_xlat - Initialize PACKET taskfile
2259 * @qc: command structure to be initialized
2260 * @scsicmd: SCSI CDB associated with this PACKET command
2261 *
2262 * LOCKING:
2263 * spin_lock_irqsave(host_set lock)
2264 *
2265 * RETURNS:
2266 * Zero on success, non-zero on failure.
2267 */
2268
Jeff Garzik057ace52005-10-22 14:27:05 -04002269static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270{
2271 struct scsi_cmnd *cmd = qc->scsicmd;
2272 struct ata_device *dev = qc->dev;
2273 int using_pio = (dev->flags & ATA_DFLAG_PIO);
be7db052005-04-17 15:26:13 -05002274 int nodata = (cmd->sc_data_direction == DMA_NONE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275
2276 if (!using_pio)
2277 /* Check whether ATAPI DMA is safe */
2278 if (ata_check_atapi_dma(qc))
2279 using_pio = 1;
2280
Tejun Heo6e7846e2006-02-12 23:32:58 +09002281 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282
2283 qc->complete_fn = atapi_qc_complete;
2284
2285 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
be7db052005-04-17 15:26:13 -05002286 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 qc->tf.flags |= ATA_TFLAG_WRITE;
2288 DPRINTK("direction: write\n");
2289 }
2290
2291 qc->tf.command = ATA_CMD_PACKET;
2292
2293 /* no data, or PIO data xfer */
2294 if (using_pio || nodata) {
2295 if (nodata)
2296 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2297 else
2298 qc->tf.protocol = ATA_PROT_ATAPI;
2299 qc->tf.lbam = (8 * 1024) & 0xff;
2300 qc->tf.lbah = (8 * 1024) >> 8;
2301 }
2302
2303 /* DMA data xfer */
2304 else {
2305 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2306 qc->tf.feature |= ATAPI_PKT_DMA;
2307
2308#ifdef ATAPI_ENABLE_DMADIR
2309 /* some SATA bridges need us to indicate data xfer direction */
be7db052005-04-17 15:26:13 -05002310 if (cmd->sc_data_direction != DMA_TO_DEVICE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311 qc->tf.feature |= ATAPI_DMADIR;
2312#endif
2313 }
2314
2315 qc->nbytes = cmd->bufflen;
2316
2317 return 0;
2318}
2319
2320/**
2321 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2322 * @ap: ATA port to which the device is attached
2323 * @scsidev: SCSI device from which we derive the ATA device
2324 *
2325 * Given various information provided in struct scsi_cmnd,
2326 * map that onto an ATA bus, and using that mapping
2327 * determine which ata_device is associated with the
2328 * SCSI command to be sent.
2329 *
2330 * LOCKING:
2331 * spin_lock_irqsave(host_set lock)
2332 *
2333 * RETURNS:
2334 * Associated ATA device, or %NULL if not found.
2335 */
2336
2337static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002338ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339{
2340 struct ata_device *dev;
2341
2342 /* skip commands not addressed to targets we simulate */
2343 if (likely(scsidev->id < ATA_MAX_DEVICES))
2344 dev = &ap->device[scsidev->id];
2345 else
2346 return NULL;
2347
2348 if (unlikely((scsidev->channel != 0) ||
2349 (scsidev->lun != 0)))
2350 return NULL;
2351
2352 if (unlikely(!ata_dev_present(dev)))
2353 return NULL;
2354
Jeff Garzik50630192005-12-13 02:29:45 -05002355 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2356 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2357 printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2358 ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
Jeff Garzik1623c812005-08-30 03:37:42 -04002359 return NULL;
Jeff Garzik50630192005-12-13 02:29:45 -05002360 }
Jeff Garzik1623c812005-08-30 03:37:42 -04002361 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362
2363 return dev;
2364}
2365
Jeff Garzikb0955182005-05-12 15:45:22 -04002366/*
2367 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2368 * @byte1: Byte 1 from pass-thru CDB.
2369 *
2370 * RETURNS:
2371 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2372 */
2373static u8
2374ata_scsi_map_proto(u8 byte1)
2375{
2376 switch((byte1 & 0x1e) >> 1) {
2377 case 3: /* Non-data */
2378 return ATA_PROT_NODATA;
2379
2380 case 6: /* DMA */
2381 return ATA_PROT_DMA;
2382
2383 case 4: /* PIO Data-in */
2384 case 5: /* PIO Data-out */
Jeff Garzikb0955182005-05-12 15:45:22 -04002385 return ATA_PROT_PIO;
2386
2387 case 10: /* Device Reset */
2388 case 0: /* Hard Reset */
2389 case 1: /* SRST */
2390 case 2: /* Bus Idle */
2391 case 7: /* Packet */
2392 case 8: /* DMA Queued */
2393 case 9: /* Device Diagnostic */
2394 case 11: /* UDMA Data-in */
2395 case 12: /* UDMA Data-Out */
2396 case 13: /* FPDMA */
2397 default: /* Reserved */
2398 break;
2399 }
2400
2401 return ATA_PROT_UNKNOWN;
2402}
2403
2404/**
2405 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2406 * @qc: command structure to be initialized
Randy Dunlap8e8b77d2005-11-01 21:29:27 -08002407 * @scsicmd: SCSI command to convert
Jeff Garzikb0955182005-05-12 15:45:22 -04002408 *
2409 * Handles either 12 or 16-byte versions of the CDB.
2410 *
2411 * RETURNS:
2412 * Zero on success, non-zero on failure.
2413 */
2414static unsigned int
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002415ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
Jeff Garzikb0955182005-05-12 15:45:22 -04002416{
2417 struct ata_taskfile *tf = &(qc->tf);
2418 struct scsi_cmnd *cmd = qc->scsicmd;
2419
2420 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002421 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002422
Albert Leef59b0cf2006-03-16 17:59:22 +08002423 if (scsicmd[1] & 0xe0)
2424 /* PIO multi not supported yet */
2425 goto invalid_fld;
2426
Jeff Garzikb0955182005-05-12 15:45:22 -04002427 /*
2428 * 12 and 16 byte CDBs use different offsets to
2429 * provide the various register values.
2430 */
2431 if (scsicmd[0] == ATA_16) {
2432 /*
2433 * 16-byte CDB - may contain extended commands.
2434 *
2435 * If that is the case, copy the upper byte register values.
2436 */
2437 if (scsicmd[1] & 0x01) {
2438 tf->hob_feature = scsicmd[3];
2439 tf->hob_nsect = scsicmd[5];
2440 tf->hob_lbal = scsicmd[7];
2441 tf->hob_lbam = scsicmd[9];
2442 tf->hob_lbah = scsicmd[11];
2443 tf->flags |= ATA_TFLAG_LBA48;
2444 } else
2445 tf->flags &= ~ATA_TFLAG_LBA48;
2446
2447 /*
2448 * Always copy low byte, device and command registers.
2449 */
2450 tf->feature = scsicmd[4];
2451 tf->nsect = scsicmd[6];
2452 tf->lbal = scsicmd[8];
2453 tf->lbam = scsicmd[10];
2454 tf->lbah = scsicmd[12];
2455 tf->device = scsicmd[13];
2456 tf->command = scsicmd[14];
2457 } else {
2458 /*
2459 * 12-byte CDB - incapable of extended commands.
2460 */
2461 tf->flags &= ~ATA_TFLAG_LBA48;
2462
2463 tf->feature = scsicmd[3];
2464 tf->nsect = scsicmd[4];
2465 tf->lbal = scsicmd[5];
2466 tf->lbam = scsicmd[6];
2467 tf->lbah = scsicmd[7];
2468 tf->device = scsicmd[8];
2469 tf->command = scsicmd[9];
2470 }
Mark Lorddcc2d1e2005-11-13 16:22:06 -05002471 /*
2472 * If slave is possible, enforce correct master/slave bit
2473 */
2474 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2475 tf->device = qc->dev->devno ?
2476 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002477
2478 /*
2479 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2480 * SET_FEATURES - XFER MODE must be preceded/succeeded
2481 * by an update to hardware-specific registers for each
2482 * controller (i.e. the reason for ->set_piomode(),
2483 * ->set_dmamode(), and ->post_set_mode() hooks).
2484 */
2485 if ((tf->command == ATA_CMD_SET_FEATURES)
2486 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002487 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002488
2489 /*
2490 * Set flags so that all registers will be written,
2491 * and pass on write indication (used for PIO/DMA
2492 * setup.)
2493 */
2494 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2495
Jeff Garzik0274aa22005-06-22 13:50:56 -04002496 if (cmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002497 tf->flags |= ATA_TFLAG_WRITE;
2498
2499 /*
2500 * Set transfer length.
2501 *
2502 * TODO: find out if we need to do more here to
2503 * cover scatter/gather case.
2504 */
2505 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2506
2507 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002508
2509 invalid_fld:
2510 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2511 /* "Invalid field in cdb" */
2512 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002513}
2514
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515/**
2516 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2517 * @dev: ATA device
2518 * @cmd: SCSI command opcode to consider
2519 *
2520 * Look up the SCSI command given, and determine whether the
2521 * SCSI command is to be translated or simulated.
2522 *
2523 * RETURNS:
2524 * Pointer to translation function if possible, %NULL if not.
2525 */
2526
2527static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2528{
2529 switch (cmd) {
2530 case READ_6:
2531 case READ_10:
2532 case READ_16:
2533
2534 case WRITE_6:
2535 case WRITE_10:
2536 case WRITE_16:
2537 return ata_scsi_rw_xlat;
2538
2539 case SYNCHRONIZE_CACHE:
2540 if (ata_try_flush_cache(dev))
2541 return ata_scsi_flush_xlat;
2542 break;
2543
2544 case VERIFY:
2545 case VERIFY_16:
2546 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002547
2548 case ATA_12:
2549 case ATA_16:
2550 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002551
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002552 case START_STOP:
2553 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554 }
2555
2556 return NULL;
2557}
2558
2559/**
2560 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2561 * @ap: ATA port to which the command was being sent
2562 * @cmd: SCSI command to dump
2563 *
2564 * Prints the contents of a SCSI command via printk().
2565 */
2566
2567static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2568 struct scsi_cmnd *cmd)
2569{
2570#ifdef ATA_DEBUG
2571 struct scsi_device *scsidev = cmd->device;
2572 u8 *scsicmd = cmd->cmnd;
2573
2574 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2575 ap->id,
2576 scsidev->channel, scsidev->id, scsidev->lun,
2577 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2578 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2579 scsicmd[8]);
2580#endif
2581}
2582
Brian Kingeb3f0f92006-03-23 17:30:02 -06002583static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
2584 struct ata_port *ap, struct ata_device *dev)
2585{
2586 if (dev->class == ATA_DEV_ATA) {
2587 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2588 cmd->cmnd[0]);
2589
2590 if (xlat_func)
2591 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
2592 else
2593 ata_scsi_simulate(ap, dev, cmd, done);
2594 } else
2595 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
2596}
2597
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598/**
2599 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2600 * @cmd: SCSI command to be sent
2601 * @done: Completion function, called when command is complete
2602 *
2603 * In some cases, this function translates SCSI commands into
2604 * ATA taskfiles, and queues the taskfiles to be sent to
2605 * hardware. In other cases, this function simulates a
2606 * SCSI device by evaluating and responding to certain
2607 * SCSI commands. This creates the overall effect of
2608 * ATA and ATAPI devices appearing as SCSI devices.
2609 *
2610 * LOCKING:
2611 * Releases scsi-layer-held lock, and obtains host_set lock.
2612 *
2613 * RETURNS:
2614 * Zero.
2615 */
2616
2617int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2618{
2619 struct ata_port *ap;
2620 struct ata_device *dev;
2621 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05002622 struct Scsi_Host *shost = scsidev->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623
Jeff Garzik005a5a02005-10-30 23:31:48 -05002624 ap = (struct ata_port *) &shost->hostdata[0];
2625
2626 spin_unlock(shost->host_lock);
2627 spin_lock(&ap->host_set->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628
2629 ata_scsi_dump_cdb(ap, cmd);
2630
2631 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002632 if (likely(dev))
2633 __ata_scsi_queuecmd(cmd, done, ap, dev);
2634 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635 cmd->result = (DID_BAD_TARGET << 16);
2636 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637 }
2638
Jeff Garzik005a5a02005-10-30 23:31:48 -05002639 spin_unlock(&ap->host_set->lock);
2640 spin_lock(shost->host_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641 return 0;
2642}
2643
2644/**
2645 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002646 * @ap: port the device is connected to
2647 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002648 * @cmd: SCSI command being sent to device.
2649 * @done: SCSI command completion function.
2650 *
2651 * Interprets and directly executes a select list of SCSI commands
2652 * that can be handled internally.
2653 *
2654 * LOCKING:
2655 * spin_lock_irqsave(host_set lock)
2656 */
2657
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002658void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659 struct scsi_cmnd *cmd,
2660 void (*done)(struct scsi_cmnd *))
2661{
2662 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04002663 const u8 *scsicmd = cmd->cmnd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002664
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002665 args.ap = ap;
2666 args.dev = dev;
2667 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668 args.cmd = cmd;
2669 args.done = done;
2670
2671 switch(scsicmd[0]) {
2672 /* no-op's, complete with success */
2673 case SYNCHRONIZE_CACHE:
2674 case REZERO_UNIT:
2675 case SEEK_6:
2676 case SEEK_10:
2677 case TEST_UNIT_READY:
2678 case FORMAT_UNIT: /* FIXME: correct? */
2679 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2680 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2681 break;
2682
2683 case INQUIRY:
2684 if (scsicmd[1] & 2) /* is CmdDt set? */
Douglas Gilbertae006512005-10-09 09:09:35 -04002685 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2687 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2688 else if (scsicmd[2] == 0x00)
2689 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2690 else if (scsicmd[2] == 0x80)
2691 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2692 else if (scsicmd[2] == 0x83)
2693 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2694 else
Douglas Gilbertae006512005-10-09 09:09:35 -04002695 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696 break;
2697
2698 case MODE_SENSE:
2699 case MODE_SENSE_10:
2700 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2701 break;
2702
2703 case MODE_SELECT: /* unconditionally return */
2704 case MODE_SELECT_10: /* bad-field-in-cdb */
Douglas Gilbertae006512005-10-09 09:09:35 -04002705 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002706 break;
2707
2708 case READ_CAPACITY:
2709 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2710 break;
2711
2712 case SERVICE_ACTION_IN:
2713 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2714 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2715 else
Douglas Gilbertae006512005-10-09 09:09:35 -04002716 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717 break;
2718
2719 case REPORT_LUNS:
2720 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2721 break;
2722
Jeff Garzikb0955182005-05-12 15:45:22 -04002723 /* mandatory commands we haven't implemented yet */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 case REQUEST_SENSE:
2725
2726 /* all other commands */
2727 default:
Douglas Gilbertae006512005-10-09 09:09:35 -04002728 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2729 /* "Invalid command operation code" */
2730 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 break;
2732 }
2733}
2734
Jeff Garzik644dd0c2005-10-03 15:55:19 -04002735void ata_scsi_scan_host(struct ata_port *ap)
2736{
Jeff Garzik3f19ee82005-10-03 21:36:41 -04002737 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04002738 unsigned int i;
2739
2740 if (ap->flags & ATA_FLAG_PORT_DISABLED)
2741 return;
2742
Jeff Garzik3f19ee82005-10-03 21:36:41 -04002743 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2744 dev = &ap->device[i];
2745
2746 if (ata_dev_present(dev))
2747 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
2748 }
Jeff Garzik644dd0c2005-10-03 15:55:19 -04002749}
2750