blob: 00a9a6c8f83c159648b0124951a801c11599b6bf [file] [log] [blame]
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>
Christoph Hellwigbeb40482006-06-10 18:01:03 +020041#include <scsi/scsi_cmnd.h>
Mike Christie85837eb2005-11-11 16:38:53 -060042#include <scsi/scsi_eh.h>
Jeff Garzik005a5a02005-10-30 23:31:48 -050043#include <scsi/scsi_device.h>
Tejun Heoa6e6ce82006-05-15 21:03:48 +090044#include <scsi/scsi_tcq.h>
Tejun Heo30afc842006-03-18 18:40:14 +090045#include <scsi/scsi_transport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/libata.h>
Jeff Garzikb0955182005-05-12 15:45:22 -040047#include <linux/hdreg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <asm/uaccess.h>
49
50#include "libata.h"
51
Jeff Garzikb0955182005-05-12 15:45:22 -040052#define SECTOR_SIZE 512
53
Tejun Heoad706992006-12-17 10:45:57 +090054typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090055
56static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
Tejun Heo83c47bc2006-05-31 18:28:07 +090060static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
Tejun Heoab5b3a52006-05-31 18:27:34 +090062
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040064#define RW_RECOVERY_MPAGE 0x1
65#define RW_RECOVERY_MPAGE_LEN 12
66#define CACHE_MPAGE 0x8
67#define CACHE_MPAGE_LEN 20
68#define CONTROL_MPAGE 0xa
69#define CONTROL_MPAGE_LEN 12
70#define ALL_MPAGES 0x3f
71#define ALL_SUB_MPAGES 0xff
72
73
74static const u8 def_rw_recovery_mpage[] = {
75 RW_RECOVERY_MPAGE,
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
80 0, 0, 0, 0,
81 0, /* write retry count */
82 0, 0, 0
83};
84
85static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
86 CACHE_MPAGE,
87 CACHE_MPAGE_LEN - 2,
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
91 0, 0, 0, 0, 0, 0, 0
92};
93
94static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE,
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
101};
102
Tejun Heo30afc842006-03-18 18:40:14 +0900103/*
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
106 */
107struct scsi_transport_template ata_scsi_transport_template = {
Christoph Hellwig9227c332006-04-01 19:21:04 +0200108 .eh_strategy_handler = ata_scsi_error,
Tejun Heo30afc842006-03-18 18:40:14 +0900109 .eh_timed_out = ata_scsi_timed_out,
Tejun Heoccf68c32006-05-31 18:28:09 +0900110 .user_scan = ata_scsi_user_scan,
Tejun Heo30afc842006-03-18 18:40:14 +0900111};
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Douglas Gilbertae006512005-10-09 09:09:35 -0400114static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
116{
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
119 done(cmd);
120}
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122/**
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
128 *
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
133 *
134 * LOCKING:
135 * Defined by the SCSI layer. We don't really care.
136 *
137 * RETURNS:
138 * Zero.
139 */
140int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
142{
143 geom[0] = 255;
144 geom[1] = 63;
145 sector_div(capacity, 255*63);
146 geom[2] = capacity;
147
148 return 0;
149}
150
Jeff Garzikb0955182005-05-12 15:45:22 -0400151/**
Tejun Heo5924b742007-01-02 20:20:07 +0900152 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
153 * @sdev: SCSI device to get identify data for
154 * @arg: User buffer area for identify data
155 *
156 * LOCKING:
157 * Defined by the SCSI layer. We don't really care.
158 *
159 * RETURNS:
160 * Zero on success, negative errno on error.
161 */
162static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
163{
164 struct ata_port *ap = ata_shost_to_port(sdev->host);
165 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
166 u16 __user *dst = arg;
167 char buf[40];
168
169 if (!dev)
170 return -ENOMSG;
171
172 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
173 return -EFAULT;
174
175 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
176 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
177 return -EFAULT;
178
179 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
180 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
181 return -EFAULT;
182
183 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
184 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
185 return -EFAULT;
186
187 return 0;
188}
189
190/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400191 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800192 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400193 * @arg: User provided data for issuing command
194 *
195 * LOCKING:
196 * Defined by the SCSI layer. We don't really care.
197 *
198 * RETURNS:
199 * Zero on success, negative errno on error.
200 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400201int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
202{
203 int rc = 0;
204 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700205 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400206 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600207 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700208 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400209
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500210 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400211 return -EINVAL;
212
213 if (copy_from_user(args, arg, sizeof(args)))
214 return -EFAULT;
215
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700216 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
217 if (!sensebuf)
218 return -ENOMEM;
219
Jeff Garzikb0955182005-05-12 15:45:22 -0400220 memset(scsi_cmd, 0, sizeof(scsi_cmd));
221
222 if (args[3]) {
223 argsize = SECTOR_SIZE * args[3];
224 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400225 if (argbuf == NULL) {
226 rc = -ENOMEM;
227 goto error;
228 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400229
230 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
231 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
232 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600233 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400234 } else {
235 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700236 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600237 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400238 }
239
240 scsi_cmd[0] = ATA_16;
241
242 scsi_cmd[4] = args[2];
243 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
244 scsi_cmd[6] = args[3];
245 scsi_cmd[8] = args[1];
246 scsi_cmd[10] = 0x4f;
247 scsi_cmd[12] = 0xc2;
248 } else {
249 scsi_cmd[6] = args[1];
250 }
251 scsi_cmd[14] = args[0];
252
253 /* Good values for timeout and retries? Values below
254 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700255 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
256 sensebuf, (10*HZ), 5, 0);
257
258 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
259 u8 *desc = sensebuf + 8;
260 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
261
262 /* If we set cc then ATA pass-through will cause a
263 * check condition even if no error. Filter that. */
264 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
265 struct scsi_sense_hdr sshdr;
266 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
267 &sshdr);
268 if (sshdr.sense_key==0 &&
269 sshdr.asc==0 && sshdr.ascq==0)
270 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
271 }
272
273 /* Send userspace a few ATA registers (same as drivers/ide) */
274 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
275 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
276 args[0] = desc[13]; /* status */
277 args[1] = desc[3]; /* error */
278 args[2] = desc[5]; /* sector count (0:7) */
279 if (copy_to_user(arg, args, sizeof(args)))
280 rc = -EFAULT;
281 }
282 }
283
284
285 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400286 rc = -EIO;
287 goto error;
288 }
289
Jeff Garzikb0955182005-05-12 15:45:22 -0400290 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500291 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400292 rc = -EFAULT;
293error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700294 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700295 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400296 return rc;
297}
298
299/**
300 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800301 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400302 * @arg: User provided data for issuing command
303 *
304 * LOCKING:
305 * Defined by the SCSI layer. We don't really care.
306 *
307 * RETURNS:
308 * Zero on success, negative errno on error.
309 */
310int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
311{
312 int rc = 0;
313 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800314 u8 args[7], *sensebuf = NULL;
315 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400316
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500317 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400318 return -EINVAL;
319
320 if (copy_from_user(args, arg, sizeof(args)))
321 return -EFAULT;
322
David Milburnaf068bd2007-01-30 00:59:15 -0800323 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
324 if (!sensebuf)
325 return -ENOMEM;
326
Jeff Garzikb0955182005-05-12 15:45:22 -0400327 memset(scsi_cmd, 0, sizeof(scsi_cmd));
328 scsi_cmd[0] = ATA_16;
329 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800330 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400331 scsi_cmd[4] = args[1];
332 scsi_cmd[6] = args[2];
333 scsi_cmd[8] = args[3];
334 scsi_cmd[10] = args[4];
335 scsi_cmd[12] = args[5];
Mark Lord2b067192007-02-07 11:40:12 -0500336 scsi_cmd[13] = args[6] & 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400337 scsi_cmd[14] = args[0];
338
Jeff Garzikb0955182005-05-12 15:45:22 -0400339 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500340 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800341 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
342 sensebuf, (10*HZ), 5, 0);
Jeff Garzikb0955182005-05-12 15:45:22 -0400343
David Milburnaf068bd2007-01-30 00:59:15 -0800344 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
345 u8 *desc = sensebuf + 8;
346 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
347
348 /* If we set cc then ATA pass-through will cause a
349 * check condition even if no error. Filter that. */
350 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
351 struct scsi_sense_hdr sshdr;
352 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
353 &sshdr);
354 if (sshdr.sense_key==0 &&
355 sshdr.asc==0 && sshdr.ascq==0)
356 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
357 }
358
359 /* Send userspace ATA registers */
360 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
361 desc[0] == 0x09) {/* code is "ATA Descriptor" */
362 args[0] = desc[13]; /* status */
363 args[1] = desc[3]; /* error */
364 args[2] = desc[5]; /* sector count (0:7) */
365 args[3] = desc[7]; /* lbal */
366 args[4] = desc[9]; /* lbam */
367 args[5] = desc[11]; /* lbah */
368 args[6] = desc[12]; /* select */
369 if (copy_to_user(arg, args, sizeof(args)))
370 rc = -EFAULT;
371 }
372 }
373
374 if (cmd_result) {
375 rc = -EIO;
376 goto error;
377 }
378
379 error:
380 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400381 return rc;
382}
383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
385{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 int val = -EINVAL, rc = -EINVAL;
387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 switch (cmd) {
389 case ATA_IOC_GET_IO32:
390 val = 0;
391 if (copy_to_user(arg, &val, 1))
392 return -EFAULT;
393 return 0;
394
395 case ATA_IOC_SET_IO32:
396 val = (unsigned long) arg;
397 if (val != 0)
398 return -EINVAL;
399 return 0;
400
Tejun Heo5924b742007-01-02 20:20:07 +0900401 case HDIO_GET_IDENTITY:
402 return ata_get_identity(scsidev, arg);
403
Jeff Garzikb0955182005-05-12 15:45:22 -0400404 case HDIO_DRIVE_CMD:
405 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
406 return -EACCES;
407 return ata_cmd_ioctl(scsidev, arg);
408
409 case HDIO_DRIVE_TASK:
410 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
411 return -EACCES;
412 return ata_task_ioctl(scsidev, arg);
413
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 default:
415 rc = -ENOTTY;
416 break;
417 }
418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 return rc;
420}
421
422/**
423 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 * @dev: ATA device to which the new command is attached
425 * @cmd: SCSI command that originated this ATA command
426 * @done: SCSI command completion function
427 *
428 * Obtain a reference to an unused ata_queued_cmd structure,
429 * which is the basic libata structure representing a single
430 * ATA command sent to the hardware.
431 *
432 * If a command was available, fill in the SCSI-specific
433 * portions of the structure with information on the
434 * current command.
435 *
436 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400437 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 *
439 * RETURNS:
440 * Command allocated, or %NULL if none available.
441 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100442static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
443 struct scsi_cmnd *cmd,
444 void (*done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
446 struct ata_queued_cmd *qc;
447
Tejun Heo3373efd2006-05-15 20:57:53 +0900448 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 if (qc) {
450 qc->scsicmd = cmd;
451 qc->scsidone = done;
452
453 if (cmd->use_sg) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400454 qc->__sg = (struct scatterlist *) cmd->request_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 qc->n_elem = cmd->use_sg;
Brian King7a801182007-01-17 12:32:12 -0600456 } else if (cmd->request_bufflen) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400457 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 qc->n_elem = 1;
459 }
460 } else {
461 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
462 done(cmd);
463 }
464
465 return qc;
466}
467
468/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400469 * ata_dump_status - user friendly display of error info
470 * @id: id of the port in question
471 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400473 * Decode and dump the ATA error/status registers for the user so
474 * that they have some idea what really happened at the non
475 * make-believe layer.
476 *
477 * LOCKING:
478 * inherited from caller
479 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100480static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400481{
482 u8 stat = tf->command, err = tf->feature;
483
484 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
485 if (stat & ATA_BUSY) {
486 printk("Busy }\n"); /* Data is not valid in this case */
487 } else {
488 if (stat & 0x40) printk("DriveReady ");
489 if (stat & 0x20) printk("DeviceFault ");
490 if (stat & 0x10) printk("SeekComplete ");
491 if (stat & 0x08) printk("DataRequest ");
492 if (stat & 0x04) printk("CorrectedError ");
493 if (stat & 0x02) printk("Index ");
494 if (stat & 0x01) printk("Error ");
495 printk("}\n");
496
497 if (err) {
498 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
499 if (err & 0x04) printk("DriveStatusError ");
500 if (err & 0x80) {
501 if (err & 0x04) printk("BadCRC ");
502 else printk("Sector ");
503 }
504 if (err & 0x40) printk("UncorrectableError ");
505 if (err & 0x10) printk("SectorIdNotFound ");
506 if (err & 0x02) printk("TrackZeroNotFound ");
507 if (err & 0x01) printk("AddrMarkNotFound ");
508 printk("}\n");
509 }
510 }
511}
512
Tejun Heod6f26d12006-07-03 16:07:26 +0900513/**
514 * ata_scsi_device_suspend - suspend ATA device associated with sdev
515 * @sdev: the SCSI device to suspend
Tejun Heo3c5100c2006-07-26 16:58:33 +0900516 * @mesg: target power management message
Tejun Heod6f26d12006-07-03 16:07:26 +0900517 *
518 * Request suspend EH action on the ATA device associated with
519 * @sdev and wait for the operation to complete.
520 *
521 * LOCKING:
522 * Kernel thread context (may sleep).
523 *
524 * RETURNS:
525 * 0 on success, -errno otherwise.
526 */
Tejun Heo3c5100c2006-07-26 16:58:33 +0900527int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +0100528{
Jeff Garzik35bb94b2006-04-11 13:12:34 -0400529 struct ata_port *ap = ata_shost_to_port(sdev->host);
Tejun Heod6f26d12006-07-03 16:07:26 +0900530 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
531 unsigned long flags;
532 unsigned int action;
533 int rc = 0;
Jens Axboe9b847542006-01-06 09:28:07 +0100534
Tejun Heod6f26d12006-07-03 16:07:26 +0900535 if (!dev)
536 goto out;
537
538 spin_lock_irqsave(ap->lock, flags);
539
540 /* wait for the previous resume to complete */
541 while (dev->flags & ATA_DFLAG_SUSPENDED) {
542 spin_unlock_irqrestore(ap->lock, flags);
543 ata_port_wait_eh(ap);
544 spin_lock_irqsave(ap->lock, flags);
545 }
546
547 /* if @sdev is already detached, nothing to do */
548 if (sdev->sdev_state == SDEV_OFFLINE ||
549 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
550 goto out_unlock;
551
552 /* request suspend */
553 action = ATA_EH_SUSPEND;
Tejun Heo3c5100c2006-07-26 16:58:33 +0900554 if (mesg.event != PM_EVENT_SUSPEND)
Tejun Heod6f26d12006-07-03 16:07:26 +0900555 action |= ATA_EH_PM_FREEZE;
556 ap->eh_info.dev_action[dev->devno] |= action;
557 ap->eh_info.flags |= ATA_EHI_QUIET;
558 ata_port_schedule_eh(ap);
559
560 spin_unlock_irqrestore(ap->lock, flags);
561
562 /* wait for EH to do the job */
563 ata_port_wait_eh(ap);
564
565 spin_lock_irqsave(ap->lock, flags);
566
567 /* If @sdev is still attached but the associated ATA device
568 * isn't suspended, the operation failed.
569 */
570 if (sdev->sdev_state != SDEV_OFFLINE &&
571 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
572 !(dev->flags & ATA_DFLAG_SUSPENDED))
573 rc = -EIO;
574
575 out_unlock:
576 spin_unlock_irqrestore(ap->lock, flags);
577 out:
578 if (rc == 0)
Tejun Heo3c5100c2006-07-26 16:58:33 +0900579 sdev->sdev_gendev.power.power_state = mesg;
Tejun Heod6f26d12006-07-03 16:07:26 +0900580 return rc;
581}
582
583/**
584 * ata_scsi_device_resume - resume ATA device associated with sdev
585 * @sdev: the SCSI device to resume
586 *
587 * Request resume EH action on the ATA device associated with
588 * @sdev and return immediately. This enables parallel
589 * wakeup/spinup of devices.
590 *
591 * LOCKING:
592 * Kernel thread context (may sleep).
593 *
594 * RETURNS:
595 * 0.
596 */
597int ata_scsi_device_resume(struct scsi_device *sdev)
598{
599 struct ata_port *ap = ata_shost_to_port(sdev->host);
600 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
601 struct ata_eh_info *ehi = &ap->eh_info;
602 unsigned long flags;
603 unsigned int action;
604
605 if (!dev)
606 goto out;
607
608 spin_lock_irqsave(ap->lock, flags);
609
610 /* if @sdev is already detached, nothing to do */
611 if (sdev->sdev_state == SDEV_OFFLINE ||
612 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
613 goto out_unlock;
614
615 /* request resume */
616 action = ATA_EH_RESUME;
617 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
618 __ata_ehi_hotplugged(ehi);
619 else
620 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
621 ehi->dev_action[dev->devno] |= action;
622
623 /* We don't want autopsy and verbose EH messages. Disable
624 * those if we're the only device on this link.
625 */
626 if (ata_port_max_devices(ap) == 1)
627 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
628
629 ata_port_schedule_eh(ap);
630
631 out_unlock:
632 spin_unlock_irqrestore(ap->lock, flags);
633 out:
634 sdev->sdev_gendev.power.power_state = PMSG_ON;
635 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +0100636}
637
Jeff Garzikb0955182005-05-12 15:45:22 -0400638/**
639 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800640 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400641 * @drv_stat: value contained in ATA status register
642 * @drv_err: value contained in ATA error register
643 * @sk: the sense key we'll fill out
644 * @asc: the additional sense code we'll fill out
645 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900646 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400647 *
648 * Converts an ATA error into a SCSI error. Fill out pointers to
649 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
650 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 *
652 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400653 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100655static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
656 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657{
Jeff Garzikb0955182005-05-12 15:45:22 -0400658 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400659
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100661 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 /* BBD|ECC|ID|MAR */
663 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
664 /* BBD|ECC|ID */
665 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
666 /* ECC|MC|MARK */
667 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
668 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
669 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
670 /* MC|ID|ABRT|TRK0|MARK */
671 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
672 /* MCR|MARK */
673 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
674 /* Bad address mark */
675 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
676 /* TRK0 */
677 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
678 /* Abort & !ICRC */
679 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
680 /* Media change request */
681 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
682 /* SRV */
683 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
684 /* Media change */
685 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
686 /* ECC */
687 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
688 /* BBD - block marked bad */
689 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
690 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
691 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100692 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 /* Must be first because BUSY means no other bits valid */
694 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
695 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
696 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
697 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
698 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
699 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 /*
702 * Is this an error we can process/parse
703 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400704 if (drv_stat & ATA_BUSY) {
705 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Jeff Garzikb0955182005-05-12 15:45:22 -0400708 if (drv_err) {
709 /* Look for drv_err */
710 for (i = 0; sense_table[i][0] != 0xFF; i++) {
711 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500712 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400713 sense_table[i][0]) {
714 *sk = sense_table[i][1];
715 *asc = sense_table[i][2];
716 *ascq = sense_table[i][3];
717 goto translate_done;
718 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400720 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900721 if (verbose)
722 printk(KERN_WARNING "ata%u: no sense translation for "
723 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 }
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400727 for (i = 0; stat_table[i][0] != 0xFF; i++) {
728 if (stat_table[i][0] & drv_stat) {
729 *sk = stat_table[i][1];
730 *asc = stat_table[i][2];
731 *ascq = stat_table[i][3];
732 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400735 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900736 if (verbose)
737 printk(KERN_WARNING "ata%u: no sense translation for "
738 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Alan Cox2d202022006-03-21 15:53:46 +0000740 /* We need a sensible error return here, which is tricky, and one
741 that won't cause people to do things like return a disk wrongly */
742 *sk = ABORTED_COMMAND;
743 *asc = 0x00;
744 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400745
746 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900747 if (verbose)
748 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
749 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
750 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400751 return;
752}
753
754/*
Tejun Heo750426a2006-11-14 22:37:35 +0900755 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400756 * @qc: Command that completed.
757 *
758 * This function is specific to the ATA descriptor format sense
759 * block specified for the ATA pass through commands. Regardless
760 * of whether the command errored or not, return a sense
761 * block. Copy all controller registers into the sense
762 * block. Clear sense key, ASC & ASCQ if there is no error.
763 *
764 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900765 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400766 */
Tejun Heo750426a2006-11-14 22:37:35 +0900767static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400768{
769 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900770 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400771 unsigned char *sb = cmd->sense_buffer;
772 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900773 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400774
775 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
776
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400777 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400778
779 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400780 * Use ata_to_sense_error() to map status register bits
781 * onto sense key, asc & ascq.
782 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900783 if (qc->err_mask ||
784 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900785 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900786 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400787 sb[1] &= 0x0f;
788 }
789
790 /*
791 * Sense data is current and format is descriptor.
792 */
793 sb[0] = 0x72;
794
795 desc[0] = 0x09;
796
Tejun Heof38621b2006-11-14 22:37:35 +0900797 /* set length of additional sense data */
798 sb[7] = 14;
799 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400800
801 /*
802 * Copy registers into sense buffer.
803 */
804 desc[2] = 0x00;
805 desc[3] = tf->feature; /* == error reg */
806 desc[5] = tf->nsect;
807 desc[7] = tf->lbal;
808 desc[9] = tf->lbam;
809 desc[11] = tf->lbah;
810 desc[12] = tf->device;
811 desc[13] = tf->command; /* == status reg */
812
813 /*
814 * Fill in Extend bit, and the high order bytes
815 * if applicable.
816 */
817 if (tf->flags & ATA_TFLAG_LBA48) {
818 desc[2] |= 0x01;
819 desc[4] = tf->hob_nsect;
820 desc[6] = tf->hob_lbal;
821 desc[8] = tf->hob_lbam;
822 desc[10] = tf->hob_lbah;
823 }
824}
825
826/**
Tejun Heo750426a2006-11-14 22:37:35 +0900827 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -0400828 * @qc: Command that we are erroring out
829 *
Tejun Heod25614b2006-11-14 22:37:35 +0900830 * Generate sense block for a failed ATA command @qc. Descriptor
831 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -0400832 *
833 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900834 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400835 */
Tejun Heo750426a2006-11-14 22:37:35 +0900836static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400837{
Tejun Heod25614b2006-11-14 22:37:35 +0900838 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -0400839 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900840 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400841 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +0900842 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900843 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +0900844 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -0400845
846 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
847
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400848 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400849
Tejun Heod25614b2006-11-14 22:37:35 +0900850 /* sense data is current and format is descriptor */
851 sb[0] = 0x72;
852
853 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -0400854 * onto sense key, asc & ascq.
855 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900856 if (qc->err_mask ||
857 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900858 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +0900859 &sb[1], &sb[2], &sb[3], verbose);
860 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400861 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Tejun Heod25614b2006-11-14 22:37:35 +0900863 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -0400864
Tejun Heod25614b2006-11-14 22:37:35 +0900865 /* information sense data descriptor */
866 sb[7] = 12;
867 desc[0] = 0x00;
868 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -0500869
Tejun Heod25614b2006-11-14 22:37:35 +0900870 desc[2] |= 0x80; /* valid */
871 desc[6] = block >> 40;
872 desc[7] = block >> 32;
873 desc[8] = block >> 24;
874 desc[9] = block >> 16;
875 desc[10] = block >> 8;
876 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877}
878
Brian Kinga6cce2a2006-03-17 17:04:15 -0600879static void ata_scsi_sdev_config(struct scsi_device *sdev)
880{
881 sdev->use_10_for_rw = 1;
882 sdev->use_10_for_ms = 1;
883}
884
885static void ata_scsi_dev_config(struct scsi_device *sdev,
886 struct ata_device *dev)
887{
Tejun Heo914ed352006-11-01 18:39:55 +0900888 /* configure max sectors */
889 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -0600890
Tejun Heo914ed352006-11-01 18:39:55 +0900891 /* SATA DMA transfers must be multiples of 4 byte, so
Brian Kinga6cce2a2006-03-17 17:04:15 -0600892 * we need to pad ATAPI transfers using an extra sg.
893 * Decrement max hw segments accordingly.
894 */
895 if (dev->class == ATA_DEV_ATAPI) {
896 request_queue_t *q = sdev->request_queue;
897 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
898 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900899
900 if (dev->flags & ATA_DFLAG_NCQ) {
901 int depth;
902
903 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
904 depth = min(ATA_MAX_QUEUE - 1, depth);
905 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
906 }
Brian Kinga6cce2a2006-03-17 17:04:15 -0600907}
908
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909/**
910 * ata_scsi_slave_config - Set SCSI device attributes
911 * @sdev: SCSI device to examine
912 *
913 * This is called before we actually start reading
914 * and writing to the device, to configure certain
915 * SCSI mid-layer behaviors.
916 *
917 * LOCKING:
918 * Defined by SCSI layer. We don't really care.
919 */
920
921int ata_scsi_slave_config(struct scsi_device *sdev)
922{
Tejun Heo31534362006-05-31 18:27:36 +0900923 struct ata_port *ap = ata_shost_to_port(sdev->host);
924 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
925
Brian Kinga6cce2a2006-03-17 17:04:15 -0600926 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
929
Tejun Heo31534362006-05-31 18:27:36 +0900930 if (dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -0600931 ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
933 return 0; /* scsi layer doesn't check return value, sigh */
934}
935
936/**
Tejun Heo83c47bc2006-05-31 18:28:07 +0900937 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
938 * @sdev: SCSI device to be destroyed
939 *
940 * @sdev is about to be destroyed for hot/warm unplugging. If
941 * this unplugging was initiated by libata as indicated by NULL
942 * dev->sdev, this function doesn't have to do anything.
943 * Otherwise, SCSI layer initiated warm-unplug is in progress.
944 * Clear dev->sdev, schedule the device for ATA detach and invoke
945 * EH.
946 *
947 * LOCKING:
948 * Defined by SCSI layer. We don't really care.
949 */
950void ata_scsi_slave_destroy(struct scsi_device *sdev)
951{
952 struct ata_port *ap = ata_shost_to_port(sdev->host);
953 unsigned long flags;
954 struct ata_device *dev;
955
956 if (!ap->ops->error_handler)
957 return;
958
Jeff Garzikba6a1302006-06-22 23:46:10 -0400959 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900960 dev = __ata_scsi_find_dev(ap, sdev);
961 if (dev && dev->sdev) {
962 /* SCSI device already in CANCEL state, no need to offline it */
963 dev->sdev = NULL;
964 dev->flags |= ATA_DFLAG_DETACH;
965 ata_port_schedule_eh(ap);
966 }
Jeff Garzikba6a1302006-06-22 23:46:10 -0400967 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900968}
969
970/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900971 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
972 * @sdev: SCSI device to configure queue depth for
973 * @queue_depth: new queue depth
974 *
975 * This is libata standard hostt->change_queue_depth callback.
976 * SCSI will call into this callback when user tries to set queue
977 * depth via sysfs.
978 *
979 * LOCKING:
980 * SCSI layer (we don't care)
981 *
982 * RETURNS:
983 * Newly configured queue depth.
984 */
985int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
986{
987 struct ata_port *ap = ata_shost_to_port(sdev->host);
988 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +0900989 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900990
Tejun Heoc3c70c42007-02-20 23:31:22 +0900991 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900992 return sdev->queue_depth;
993
994 dev = ata_scsi_find_dev(ap, sdev);
995 if (!dev || !ata_dev_enabled(dev))
996 return sdev->queue_depth;
997
Tejun Heoc3c70c42007-02-20 23:31:22 +0900998 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +0900999 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001000 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1001 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001002 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001003 queue_depth = 1;
1004 }
Tejun Heo360f6542006-09-30 19:45:00 +09001005 spin_unlock_irqrestore(ap->lock, flags);
1006
Tejun Heoc3c70c42007-02-20 23:31:22 +09001007 /* limit and apply queue depth */
1008 queue_depth = min(queue_depth, sdev->host->can_queue);
1009 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1010 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1011
1012 if (sdev->queue_depth == queue_depth)
1013 return -EINVAL;
1014
1015 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001016 return queue_depth;
1017}
1018
1019/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001020 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1021 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001022 *
1023 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1024 * (to start). Perhaps these commands should be preceded by
1025 * CHECK POWER MODE to see what power mode the device is already in.
1026 * [See SAT revision 5 at www.t10.org]
1027 *
1028 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001029 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001030 *
1031 * RETURNS:
1032 * Zero on success, non-zero on error.
1033 */
Tejun Heoad706992006-12-17 10:45:57 +09001034static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001035{
Tejun Heo542b1442006-12-17 10:45:08 +09001036 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001037 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001038 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001039
Tejun Heo2e5704f2006-12-17 10:46:33 +09001040 if (scmd->cmd_len < 5)
1041 goto invalid_fld;
1042
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001043 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1044 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001045 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001046 ; /* ignore IMMED bit, violates sat-r05 */
1047 }
Tejun Heo542b1442006-12-17 10:45:08 +09001048 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001049 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001050 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001051 goto invalid_fld; /* power conditions not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001052 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001053 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001054
1055 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001056 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001057
1058 tf->lbah = 0x0;
1059 tf->lbam = 0x0;
1060 tf->lbal = 0x0;
1061 tf->device |= ATA_LBA;
1062 } else {
1063 /* CHS */
1064 tf->lbal = 0x1; /* sect */
1065 tf->lbam = 0x0; /* cyl low */
1066 tf->lbah = 0x0; /* cyl high */
1067 }
1068
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001069 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Robert Hancock78981a72007-01-30 00:59:18 -08001070 } else
1071 /* Issue ATA STANDBY IMMEDIATE command */
1072 tf->command = ATA_CMD_STANDBYNOW1;
1073
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001074 /*
1075 * Standby and Idle condition timers could be implemented but that
1076 * would require libata to implement the Power condition mode page
1077 * and allow the user to change it. Changing mode pages requires
1078 * MODE SELECT to be implemented.
1079 */
1080
1081 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001082
1083invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001084 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001085 /* "Invalid field in cbd" */
1086 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001087}
1088
1089
1090/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1092 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 *
1094 * Sets up an ATA taskfile to issue FLUSH CACHE or
1095 * FLUSH CACHE EXT.
1096 *
1097 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001098 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 *
1100 * RETURNS:
1101 * Zero on success, non-zero on error.
1102 */
Tejun Heoad706992006-12-17 10:45:57 +09001103static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104{
1105 struct ata_taskfile *tf = &qc->tf;
1106
1107 tf->flags |= ATA_TFLAG_DEVICE;
1108 tf->protocol = ATA_PROT_NODATA;
1109
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001110 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 tf->command = ATA_CMD_FLUSH_EXT;
1112 else
1113 tf->command = ATA_CMD_FLUSH;
1114
1115 return 0;
1116}
1117
1118/**
Albert Lee3aef5232005-10-04 08:47:43 -04001119 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001120 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001121 *
1122 * Calculate LBA and transfer length for 6-byte commands.
1123 *
1124 * RETURNS:
1125 * @plba: the LBA
1126 * @plen: the transfer length
1127 */
Tejun Heo542b1442006-12-17 10:45:08 +09001128static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001129{
1130 u64 lba = 0;
1131 u32 len = 0;
1132
1133 VPRINTK("six-byte command\n");
1134
Tejun Heo542b1442006-12-17 10:45:08 +09001135 lba |= ((u64)cdb[2]) << 8;
1136 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001137
Tejun Heo542b1442006-12-17 10:45:08 +09001138 len |= ((u32)cdb[4]);
Albert Lee3aef5232005-10-04 08:47:43 -04001139
1140 *plba = lba;
1141 *plen = len;
1142}
1143
1144/**
1145 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001146 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001147 *
1148 * Calculate LBA and transfer length for 10-byte commands.
1149 *
1150 * RETURNS:
1151 * @plba: the LBA
1152 * @plen: the transfer length
1153 */
Tejun Heo542b1442006-12-17 10:45:08 +09001154static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001155{
1156 u64 lba = 0;
1157 u32 len = 0;
1158
1159 VPRINTK("ten-byte command\n");
1160
Tejun Heo542b1442006-12-17 10:45:08 +09001161 lba |= ((u64)cdb[2]) << 24;
1162 lba |= ((u64)cdb[3]) << 16;
1163 lba |= ((u64)cdb[4]) << 8;
1164 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001165
Tejun Heo542b1442006-12-17 10:45:08 +09001166 len |= ((u32)cdb[7]) << 8;
1167 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001168
1169 *plba = lba;
1170 *plen = len;
1171}
1172
1173/**
1174 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001175 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001176 *
1177 * Calculate LBA and transfer length for 16-byte commands.
1178 *
1179 * RETURNS:
1180 * @plba: the LBA
1181 * @plen: the transfer length
1182 */
Tejun Heo542b1442006-12-17 10:45:08 +09001183static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001184{
1185 u64 lba = 0;
1186 u32 len = 0;
1187
1188 VPRINTK("sixteen-byte command\n");
1189
Tejun Heo542b1442006-12-17 10:45:08 +09001190 lba |= ((u64)cdb[2]) << 56;
1191 lba |= ((u64)cdb[3]) << 48;
1192 lba |= ((u64)cdb[4]) << 40;
1193 lba |= ((u64)cdb[5]) << 32;
1194 lba |= ((u64)cdb[6]) << 24;
1195 lba |= ((u64)cdb[7]) << 16;
1196 lba |= ((u64)cdb[8]) << 8;
1197 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001198
Tejun Heo542b1442006-12-17 10:45:08 +09001199 len |= ((u32)cdb[10]) << 24;
1200 len |= ((u32)cdb[11]) << 16;
1201 len |= ((u32)cdb[12]) << 8;
1202 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001203
1204 *plba = lba;
1205 *plen = len;
1206}
1207
1208/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1210 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 *
1212 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1213 *
1214 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001215 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 *
1217 * RETURNS:
1218 * Zero on success, non-zero on error.
1219 */
Tejun Heoad706992006-12-17 10:45:57 +09001220static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221{
Tejun Heo542b1442006-12-17 10:45:08 +09001222 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001224 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001226 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001227 u64 block;
1228 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
1230 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1231 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232
Tejun Heo2e5704f2006-12-17 10:46:33 +09001233 if (cdb[0] == VERIFY) {
1234 if (scmd->cmd_len < 10)
1235 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001236 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001237 } else if (cdb[0] == VERIFY_16) {
1238 if (scmd->cmd_len < 16)
1239 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001240 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001241 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001242 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
Albert Lee8bf62ec2005-05-12 15:29:42 -04001244 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001245 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001246 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001247 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001248 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001249 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Albert Lee07506692005-10-12 15:04:18 +08001251 if (dev->flags & ATA_DFLAG_LBA) {
1252 tf->flags |= ATA_TFLAG_LBA;
1253
Albert Leec6a33e22005-10-12 15:12:26 +08001254 if (lba_28_ok(block, n_block)) {
1255 /* use LBA28 */
1256 tf->command = ATA_CMD_VERIFY;
1257 tf->device |= (block >> 24) & 0xf;
1258 } else if (lba_48_ok(block, n_block)) {
1259 if (!(dev->flags & ATA_DFLAG_LBA48))
1260 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001261
1262 /* use LBA48 */
1263 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001264 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Albert Lee8bf62ec2005-05-12 15:29:42 -04001266 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Albert Lee8bf62ec2005-05-12 15:29:42 -04001268 tf->hob_lbah = (block >> 40) & 0xff;
1269 tf->hob_lbam = (block >> 32) & 0xff;
1270 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001271 } else
1272 /* request too large even for LBA48 */
1273 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001274
1275 tf->nsect = n_block & 0xff;
1276
1277 tf->lbah = (block >> 16) & 0xff;
1278 tf->lbam = (block >> 8) & 0xff;
1279 tf->lbal = block & 0xff;
1280
1281 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001283 /* CHS */
1284 u32 sect, head, cyl, track;
1285
Albert Leec6a33e22005-10-12 15:12:26 +08001286 if (!lba_28_ok(block, n_block))
1287 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001288
Albert Lee8bf62ec2005-05-12 15:29:42 -04001289 /* Convert LBA to CHS */
1290 track = (u32)block / dev->sectors;
1291 cyl = track / dev->heads;
1292 head = track % dev->heads;
1293 sect = (u32)block % dev->sectors + 1;
1294
Albert Leec187c4b2005-10-04 08:46:51 -04001295 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1296 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001297
1298 /* Check whether the converted CHS can fit.
1299 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001300 Head: 0-15
1301 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001302 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001303 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001304
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001306 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1307 tf->lbal = sect;
1308 tf->lbam = cyl;
1309 tf->lbah = cyl >> 8;
1310 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 }
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001314
1315invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001316 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001317 /* "Invalid field in cbd" */
1318 return 1;
1319
1320out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001321 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001322 /* "Logical Block Address out of range" */
1323 return 1;
1324
1325nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001326 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001327 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328}
1329
1330/**
1331 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1332 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 *
1334 * Converts any of six SCSI read/write commands into the
1335 * ATA counterpart, including starting sector (LBA),
1336 * sector count, and taking into account the device's LBA48
1337 * support.
1338 *
1339 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1340 * %WRITE_16 are currently supported.
1341 *
1342 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001343 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 *
1345 * RETURNS:
1346 * Zero on success, non-zero on error.
1347 */
Tejun Heoad706992006-12-17 10:45:57 +09001348static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349{
Tejun Heo542b1442006-12-17 10:45:08 +09001350 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001351 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001352 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001353 u64 block;
1354 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001355 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
Tejun Heo542b1442006-12-17 10:45:08 +09001357 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001358 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001360 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001361 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001362 case READ_10:
1363 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001364 if (unlikely(scmd->cmd_len < 10))
1365 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001366 scsi_10_lba_len(cdb, &block, &n_block);
1367 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001368 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001369 break;
1370 case READ_6:
1371 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001372 if (unlikely(scmd->cmd_len < 6))
1373 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001374 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001375
1376 /* for 6-byte r/w commands, transfer length 0
1377 * means 256 blocks of data, not 0 block.
1378 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001379 if (!n_block)
1380 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001381 break;
1382 case READ_16:
1383 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001384 if (unlikely(scmd->cmd_len < 16))
1385 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001386 scsi_16_lba_len(cdb, &block, &n_block);
1387 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001388 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001389 break;
1390 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001391 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001392 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 }
1394
Albert Lee8bf62ec2005-05-12 15:29:42 -04001395 /* Check and compose ATA command */
1396 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001397 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1398 * length 0 means transfer 0 block of data.
1399 * However, for ATA R/W commands, sector count 0 means
1400 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001401 *
1402 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001403 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001404 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001405
Tejun Heobd056d72006-11-14 22:47:10 +09001406 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001407 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001408
Tejun Heobd056d72006-11-14 22:47:10 +09001409 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1410 qc->tag);
1411 if (likely(rc == 0))
1412 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001413
Tejun Heobd056d72006-11-14 22:47:10 +09001414 if (rc == -ERANGE)
1415 goto out_of_range;
1416 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001417invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001418 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001419 /* "Invalid field in cbd" */
1420 return 1;
1421
1422out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001423 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001424 /* "Logical Block Address out of range" */
1425 return 1;
1426
1427nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001428 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001429 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430}
1431
Tejun Heo77853bf2006-01-23 13:09:36 +09001432static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433{
Tejun Heoc31f5712006-11-22 12:39:43 +09001434 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001436 u8 *cdb = cmd->cmnd;
Albert Leea22e2eb2005-12-05 15:38:02 +08001437 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
zhao, forrest3057ac32006-06-12 12:01:34 +08001439 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1440 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1441 * cache
1442 */
Tejun Heoc31f5712006-11-22 12:39:43 +09001443 if (ap->ops->error_handler &&
1444 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
zhao, forrest3057ac32006-06-12 12:01:34 +08001445 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1446 (qc->tf.feature == SETFEATURES_WC_OFF))) {
Tejun Heoc31f5712006-11-22 12:39:43 +09001447 ap->eh_info.action |= ATA_EH_REVALIDATE;
1448 ata_port_schedule_eh(ap);
zhao, forrest3057ac32006-06-12 12:01:34 +08001449 }
1450
Jeff Garzikb0955182005-05-12 15:45:22 -04001451 /* For ATA pass thru (SAT) commands, generate a sense block if
1452 * user mandated it or if there's an error. Note that if we
1453 * generate because the user forced us to, a check condition
1454 * is generated and the ATA register values are returned
1455 * whether the command completed successfully or not. If there
1456 * was no error, SK, ASC and ASCQ will all be zero.
1457 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001458 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1459 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001460 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001461 } else {
1462 if (!need_sense) {
1463 cmd->result = SAM_STAT_GOOD;
1464 } else {
1465 /* TODO: decide which descriptor format to use
1466 * for 48b LBA devices and call that here
1467 * instead of the fixed desc, which is only
1468 * good for smaller LBA (and maybe CHS?)
1469 * devices.
1470 */
Tejun Heo750426a2006-11-14 22:37:35 +09001471 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001472 }
1473 }
1474
Tejun Heoc31f5712006-11-22 12:39:43 +09001475 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001476 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
1478 qc->scsidone(cmd);
1479
Tejun Heo77853bf2006-01-23 13:09:36 +09001480 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481}
1482
1483/**
Tejun Heo3dc1d882006-05-15 21:03:45 +09001484 * ata_scmd_need_defer - Check whether we need to defer scmd
1485 * @dev: ATA device to which the command is addressed
1486 * @is_io: Is the command IO (and thus possibly NCQ)?
1487 *
1488 * NCQ and non-NCQ commands cannot run together. As upper layer
1489 * only knows the queue depth, we are responsible for maintaining
1490 * exclusion. This function checks whether a new command can be
1491 * issued to @dev.
1492 *
1493 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001494 * spin_lock_irqsave(host lock)
Tejun Heo3dc1d882006-05-15 21:03:45 +09001495 *
1496 * RETURNS:
1497 * 1 if deferring is needed, 0 otherwise.
1498 */
1499static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1500{
1501 struct ata_port *ap = dev->ap;
Tejun Heofcf1bf12007-02-20 23:27:06 +09001502 int is_ncq = is_io && ata_ncq_enabled(dev);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001503
Tejun Heofcf1bf12007-02-20 23:27:06 +09001504 if (is_ncq) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09001505 if (!ata_tag_valid(ap->active_tag))
1506 return 0;
1507 } else {
1508 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1509 return 0;
1510 }
1511 return 1;
1512}
1513
1514/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 * @dev: ATA device to which the command is addressed
1517 * @cmd: SCSI command to execute
1518 * @done: SCSI command completion function
1519 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1520 *
1521 * Our ->queuecommand() function has decided that the SCSI
1522 * command issued can be directly translated into an ATA
1523 * command, rather than handled internally.
1524 *
1525 * This function sets up an ata_queued_cmd structure for the
1526 * SCSI command, and sends that ata_queued_cmd to the hardware.
1527 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001528 * The xlat_func argument (actor) returns 0 if ready to execute
1529 * ATA command, else 1 to finish translation. If 1 is returned
1530 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1531 * to be set reflecting an error condition or clean (early)
1532 * termination.
1533 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001535 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001536 *
1537 * RETURNS:
1538 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1539 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001541static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1542 void (*done)(struct scsi_cmnd *),
1543 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544{
1545 struct ata_queued_cmd *qc;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001546 int is_io = xlat_func == ata_scsi_rw_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
1548 VPRINTK("ENTER\n");
1549
Tejun Heo3dc1d882006-05-15 21:03:45 +09001550 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1551 goto defer;
1552
Tejun Heo3373efd2006-05-15 20:57:53 +09001553 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001555 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
1557 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001558 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1559 cmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 if (unlikely(cmd->request_bufflen < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001561 ata_dev_printk(dev, KERN_WARNING,
1562 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001563 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 }
1565
1566 if (cmd->use_sg)
1567 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1568 else
1569 ata_sg_init_one(qc, cmd->request_buffer,
1570 cmd->request_bufflen);
1571
1572 qc->dma_dir = cmd->sc_data_direction;
1573 }
1574
1575 qc->complete_fn = ata_scsi_qc_complete;
1576
Tejun Heoad706992006-12-17 10:45:57 +09001577 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001578 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579
1580 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001581 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582
1583 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001584 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
Douglas Gilbertae006512005-10-09 09:09:35 -04001586early_finish:
1587 ata_qc_free(qc);
1588 done(cmd);
1589 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001590 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001591
1592err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001594 cmd->result = (DID_ERROR << 16);
1595 done(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001596err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001597 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001598 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001599
1600defer:
1601 DPRINTK("EXIT - defer\n");
1602 return SCSI_MLQUEUE_DEVICE_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603}
1604
1605/**
1606 * ata_scsi_rbuf_get - Map response buffer.
1607 * @cmd: SCSI command containing buffer to be mapped.
1608 * @buf_out: Pointer to mapped area.
1609 *
1610 * Maps buffer contained within SCSI command @cmd.
1611 *
1612 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001613 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 *
1615 * RETURNS:
1616 * Length of response buffer.
1617 */
1618
1619static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1620{
1621 u8 *buf;
1622 unsigned int buflen;
1623
1624 if (cmd->use_sg) {
1625 struct scatterlist *sg;
1626
1627 sg = (struct scatterlist *) cmd->request_buffer;
Jeff Garzikda02d2a2006-12-11 11:05:53 -05001628 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 buflen = sg->length;
1630 } else {
1631 buf = cmd->request_buffer;
1632 buflen = cmd->request_bufflen;
1633 }
1634
1635 *buf_out = buf;
1636 return buflen;
1637}
1638
1639/**
1640 * ata_scsi_rbuf_put - Unmap response buffer.
1641 * @cmd: SCSI command containing buffer to be unmapped.
1642 * @buf: buffer to unmap
1643 *
1644 * Unmaps response buffer contained within @cmd.
1645 *
1646 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001647 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 */
1649
1650static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1651{
1652 if (cmd->use_sg) {
1653 struct scatterlist *sg;
1654
1655 sg = (struct scatterlist *) cmd->request_buffer;
Jeff Garzikda02d2a2006-12-11 11:05:53 -05001656 kunmap_atomic(buf - sg->offset, KM_IRQ0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 }
1658}
1659
1660/**
1661 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1662 * @args: device IDENTIFY data / SCSI command of interest.
1663 * @actor: Callback hook for desired SCSI command simulator
1664 *
1665 * Takes care of the hard work of simulating a SCSI command...
1666 * Mapping the response buffer, calling the command's handler,
1667 * and handling the handler's return value. This return value
1668 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001669 * completed successfully (0), or not (in which case cmd->result
1670 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 *
1672 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001673 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674 */
1675
1676void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1677 unsigned int (*actor) (struct ata_scsi_args *args,
1678 u8 *rbuf, unsigned int buflen))
1679{
1680 u8 *rbuf;
1681 unsigned int buflen, rc;
1682 struct scsi_cmnd *cmd = args->cmd;
1683
1684 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1685 memset(rbuf, 0, buflen);
1686 rc = actor(args, rbuf, buflen);
1687 ata_scsi_rbuf_put(cmd, rbuf);
1688
Douglas Gilbertae006512005-10-09 09:09:35 -04001689 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001691 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692}
1693
1694/**
Tejun Heo6a362612006-11-20 11:15:47 +09001695 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1696 * @idx: byte index into SCSI response buffer
1697 * @val: value to set
1698 *
1699 * To be used by SCSI command simulator functions. This macros
1700 * expects two local variables, u8 *rbuf and unsigned int buflen,
1701 * are in scope.
1702 *
1703 * LOCKING:
1704 * None.
1705 */
1706#define ATA_SCSI_RBUF_SET(idx, val) do { \
1707 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1708 } while (0)
1709
1710/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 * ata_scsiop_inq_std - Simulate INQUIRY command
1712 * @args: device IDENTIFY data / SCSI command of interest.
1713 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1714 * @buflen: Response buffer length.
1715 *
1716 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001717 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 *
1719 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001720 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 */
1722
1723unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1724 unsigned int buflen)
1725{
1726 u8 hdr[] = {
1727 TYPE_DISK,
1728 0,
1729 0x5, /* claim SPC-3 version compatibility */
1730 2,
1731 95 - 4
1732 };
1733
1734 /* set scsi removeable (RMB) bit per ata bit */
1735 if (ata_id_removeable(args->id))
1736 hdr[1] |= (1 << 7);
1737
1738 VPRINTK("ENTER\n");
1739
1740 memcpy(rbuf, hdr, sizeof(hdr));
1741
1742 if (buflen > 35) {
1743 memcpy(&rbuf[8], "ATA ", 8);
Tejun Heoa0cf7332007-01-02 20:18:49 +09001744 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1745 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 if (rbuf[32] == 0 || rbuf[32] == ' ')
1747 memcpy(&rbuf[32], "n/a ", 4);
1748 }
1749
1750 if (buflen > 63) {
1751 const u8 versions[] = {
1752 0x60, /* SAM-3 (no version claimed) */
1753
1754 0x03,
1755 0x20, /* SBC-2 (no version claimed) */
1756
1757 0x02,
1758 0x60 /* SPC-3 (no version claimed) */
1759 };
1760
1761 memcpy(rbuf + 59, versions, sizeof(versions));
1762 }
1763
1764 return 0;
1765}
1766
1767/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001768 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 * @args: device IDENTIFY data / SCSI command of interest.
1770 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1771 * @buflen: Response buffer length.
1772 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001773 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 *
1775 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001776 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 */
1778
1779unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1780 unsigned int buflen)
1781{
1782 const u8 pages[] = {
1783 0x00, /* page 0x00, this page */
1784 0x80, /* page 0x80, unit serial no page */
1785 0x83 /* page 0x83, device ident page */
1786 };
Jeff Garzikb142eb62006-03-21 20:37:47 -05001787 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788
1789 if (buflen > 6)
1790 memcpy(rbuf + 4, pages, sizeof(pages));
1791
1792 return 0;
1793}
1794
1795/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001796 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797 * @args: device IDENTIFY data / SCSI command of interest.
1798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1799 * @buflen: Response buffer length.
1800 *
1801 * Returns ATA device serial number.
1802 *
1803 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001804 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 */
1806
1807unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1808 unsigned int buflen)
1809{
1810 const u8 hdr[] = {
1811 0,
1812 0x80, /* this page code */
1813 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001814 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815 };
1816 memcpy(rbuf, hdr, sizeof(hdr));
1817
Tejun Heoa0cf7332007-01-02 20:18:49 +09001818 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
Tejun Heo6a62a042006-02-13 10:02:46 +09001819 ata_id_string(args->id, (unsigned char *) &rbuf[4],
Tejun Heoa0cf7332007-01-02 20:18:49 +09001820 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821
1822 return 0;
1823}
1824
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001826 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 * @args: device IDENTIFY data / SCSI command of interest.
1828 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1829 * @buflen: Response buffer length.
1830 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001831 * Yields two logical unit device identification designators:
1832 * - vendor specific ASCII containing the ATA serial number
1833 * - SAT defined "t10 vendor id based" containing ASCII vendor
1834 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 *
1836 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001837 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 */
1839
1840unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1841 unsigned int buflen)
1842{
Jeff Garzikb142eb62006-03-21 20:37:47 -05001843 int num;
1844 const int sat_model_serial_desc_len = 68;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001845
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05001847 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
Tejun Heoa0cf7332007-01-02 20:18:49 +09001849 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
Jeff Garzikb142eb62006-03-21 20:37:47 -05001850 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001851 rbuf[num + 0] = 2;
Tejun Heoa0cf7332007-01-02 20:18:49 +09001852 rbuf[num + 3] = ATA_ID_SERNO_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001853 num += 4;
1854 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001855 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1856 num += ATA_ID_SERNO_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 }
Jeff Garzikb142eb62006-03-21 20:37:47 -05001858 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1859 /* SAT defined lu model and serial numbers descriptor */
1860 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001861 rbuf[num + 0] = 2;
1862 rbuf[num + 1] = 1;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001863 rbuf[num + 3] = sat_model_serial_desc_len;
1864 num += 4;
1865 memcpy(rbuf + num, "ATA ", 8);
1866 num += 8;
1867 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001868 ATA_ID_PROD, ATA_ID_PROD_LEN);
1869 num += ATA_ID_PROD_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001870 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001871 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1872 num += ATA_ID_SERNO_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001873 }
1874 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 return 0;
1876}
1877
1878/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001879 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 * @args: device IDENTIFY data / SCSI command of interest.
1881 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1882 * @buflen: Response buffer length.
1883 *
1884 * No operation. Simply returns success to caller, to indicate
1885 * that the caller should successfully complete this SCSI command.
1886 *
1887 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001888 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 */
1890
1891unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1892 unsigned int buflen)
1893{
1894 VPRINTK("ENTER\n");
1895 return 0;
1896}
1897
1898/**
1899 * ata_msense_push - Push data onto MODE SENSE data output buffer
1900 * @ptr_io: (input/output) Location to store more output data
1901 * @last: End of output data buffer
1902 * @buf: Pointer to BLOB being added to output buffer
1903 * @buflen: Length of BLOB
1904 *
1905 * Store MODE SENSE data on an output buffer.
1906 *
1907 * LOCKING:
1908 * None.
1909 */
1910
1911static void ata_msense_push(u8 **ptr_io, const u8 *last,
1912 const u8 *buf, unsigned int buflen)
1913{
1914 u8 *ptr = *ptr_io;
1915
1916 if ((ptr + buflen - 1) > last)
1917 return;
1918
1919 memcpy(ptr, buf, buflen);
1920
1921 ptr += buflen;
1922
1923 *ptr_io = ptr;
1924}
1925
1926/**
1927 * ata_msense_caching - Simulate MODE SENSE caching info page
1928 * @id: device IDENTIFY data
1929 * @ptr_io: (input/output) Location to store more output data
1930 * @last: End of output data buffer
1931 *
1932 * Generate a caching info page, which conditionally indicates
1933 * write caching to the SCSI layer, depending on device
1934 * capabilities.
1935 *
1936 * LOCKING:
1937 * None.
1938 */
1939
1940static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1941 const u8 *last)
1942{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001943 u8 page[CACHE_MPAGE_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001945 memcpy(page, def_cache_mpage, sizeof(page));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 if (ata_id_wcache_enabled(id))
1947 page[2] |= (1 << 2); /* write cache enable */
1948 if (!ata_id_rahead_enabled(id))
1949 page[12] |= (1 << 5); /* disable read ahead */
1950
1951 ata_msense_push(ptr_io, last, page, sizeof(page));
1952 return sizeof(page);
1953}
1954
1955/**
1956 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1957 * @dev: Device associated with this MODE SENSE command
1958 * @ptr_io: (input/output) Location to store more output data
1959 * @last: End of output data buffer
1960 *
1961 * Generate a generic MODE SENSE control mode page.
1962 *
1963 * LOCKING:
1964 * None.
1965 */
1966
1967static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1968{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001969 ata_msense_push(ptr_io, last, def_control_mpage,
1970 sizeof(def_control_mpage));
1971 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972}
1973
1974/**
1975 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1976 * @dev: Device associated with this MODE SENSE command
1977 * @ptr_io: (input/output) Location to store more output data
1978 * @last: End of output data buffer
1979 *
1980 * Generate a generic MODE SENSE r/w error recovery page.
1981 *
1982 * LOCKING:
1983 * None.
1984 */
1985
1986static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1987{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001989 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1990 sizeof(def_rw_recovery_mpage));
1991 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992}
1993
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001994/*
1995 * We can turn this into a real blacklist if it's needed, for now just
1996 * blacklist any Maxtor BANC1G10 revision firmware
1997 */
1998static int ata_dev_supports_fua(u16 *id)
1999{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002000 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002001
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002002 if (!libata_fua)
2003 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002004 if (!ata_id_has_fua(id))
2005 return 0;
2006
Tejun Heoa0cf7332007-01-02 20:18:49 +09002007 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2008 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002009
Tejun Heo2e026712006-02-12 22:47:04 +09002010 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002011 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002012 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002013 return 1;
2014
2015 return 0; /* blacklisted */
2016}
2017
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018/**
2019 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2020 * @args: device IDENTIFY data / SCSI command of interest.
2021 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2022 * @buflen: Response buffer length.
2023 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002024 * Simulate MODE SENSE commands. Assume this is invoked for direct
2025 * access devices (e.g. disks) only. There should be no block
2026 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 *
2028 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002029 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030 */
2031
2032unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2033 unsigned int buflen)
2034{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002035 struct ata_device *dev = args->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 u8 *scsicmd = args->cmd->cmnd, *p, *last;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002037 const u8 sat_blk_desc[] = {
2038 0, 0, 0, 0, /* number of blocks: sat unspecified */
2039 0,
2040 0, 0x2, 0x0 /* block length: 512 bytes */
2041 };
2042 u8 pg, spg;
2043 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002044 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
2046 VPRINTK("ENTER\n");
2047
2048 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002049 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2050 /*
2051 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002053
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002055 switch (page_control) {
2056 case 0: /* current */
2057 break; /* supported */
2058 case 3: /* saved */
2059 goto saving_not_supp;
2060 case 1: /* changeable */
2061 case 2: /* defaults */
2062 default:
2063 goto invalid_fld;
2064 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002066 if (six_byte) {
2067 output_len = 4 + (ebd ? 8 : 0);
2068 alloc_len = scsicmd[4];
2069 } else {
2070 output_len = 8 + (ebd ? 8 : 0);
2071 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2072 }
2073 minlen = (alloc_len < buflen) ? alloc_len : buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074
2075 p = rbuf + output_len;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002076 last = rbuf + minlen - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002078 pg = scsicmd[2] & 0x3f;
2079 spg = scsicmd[3];
2080 /*
2081 * No mode subpages supported (yet) but asking for _all_
2082 * subpages may be valid
2083 */
2084 if (spg && (spg != ALL_SUB_MPAGES))
2085 goto invalid_fld;
2086
2087 switch(pg) {
2088 case RW_RECOVERY_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 output_len += ata_msense_rw_recovery(&p, last);
2090 break;
2091
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002092 case CACHE_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 output_len += ata_msense_caching(args->id, &p, last);
2094 break;
2095
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002096 case CONTROL_MPAGE: {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 output_len += ata_msense_ctl_mode(&p, last);
2098 break;
2099 }
2100
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002101 case ALL_MPAGES:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 output_len += ata_msense_rw_recovery(&p, last);
2103 output_len += ata_msense_caching(args->id, &p, last);
2104 output_len += ata_msense_ctl_mode(&p, last);
2105 break;
2106
2107 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002108 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109 }
2110
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002111 if (minlen < 1)
2112 return 0;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002113
2114 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002115 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002116 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2117 dpofua = 1 << 4;
2118
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 if (six_byte) {
2120 output_len--;
2121 rbuf[0] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002122 if (minlen > 2)
2123 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002124 if (ebd) {
2125 if (minlen > 3)
2126 rbuf[3] = sizeof(sat_blk_desc);
2127 if (minlen > 11)
2128 memcpy(rbuf + 4, sat_blk_desc,
2129 sizeof(sat_blk_desc));
2130 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 } else {
2132 output_len -= 2;
2133 rbuf[0] = output_len >> 8;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002134 if (minlen > 1)
2135 rbuf[1] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002136 if (minlen > 3)
2137 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002138 if (ebd) {
2139 if (minlen > 7)
2140 rbuf[7] = sizeof(sat_blk_desc);
2141 if (minlen > 15)
2142 memcpy(rbuf + 8, sat_blk_desc,
2143 sizeof(sat_blk_desc));
2144 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002147
2148invalid_fld:
2149 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2150 /* "Invalid field in cbd" */
2151 return 1;
2152
2153saving_not_supp:
2154 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2155 /* "Saving parameters not supported" */
2156 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157}
2158
2159/**
2160 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2161 * @args: device IDENTIFY data / SCSI command of interest.
2162 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2163 * @buflen: Response buffer length.
2164 *
2165 * Simulate READ CAPACITY commands.
2166 *
2167 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002168 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2171 unsigned int buflen)
2172{
Tejun Heo6a362612006-11-20 11:15:47 +09002173 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174
2175 VPRINTK("ENTER\n");
2176
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002178 if (last_lba >= 0xffffffffULL)
2179 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002180
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 /* sector count, 32-bit */
Tejun Heo6a362612006-11-20 11:15:47 +09002182 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2183 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2184 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2185 ATA_SCSI_RBUF_SET(3, last_lba);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186
2187 /* sector size */
Tejun Heo6a362612006-11-20 11:15:47 +09002188 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2189 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 } else {
2191 /* sector count, 64-bit */
Tejun Heo6a362612006-11-20 11:15:47 +09002192 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2193 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2194 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2195 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2196 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2197 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2198 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2199 ATA_SCSI_RBUF_SET(7, last_lba);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200
2201 /* sector size */
Tejun Heo6a362612006-11-20 11:15:47 +09002202 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2203 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 }
2205
2206 return 0;
2207}
2208
2209/**
2210 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2211 * @args: device IDENTIFY data / SCSI command of interest.
2212 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2213 * @buflen: Response buffer length.
2214 *
2215 * Simulate REPORT LUNS command.
2216 *
2217 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002218 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219 */
2220
2221unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2222 unsigned int buflen)
2223{
2224 VPRINTK("ENTER\n");
2225 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2226
2227 return 0;
2228}
2229
2230/**
Douglas Gilbert845c5832005-10-09 08:55:41 -04002231 * ata_scsi_set_sense - Set SCSI sense data and status
2232 * @cmd: SCSI request to be handled
2233 * @sk: SCSI-defined sense key
2234 * @asc: SCSI-defined additional sense code
2235 * @ascq: SCSI-defined additional sense code qualifier
2236 *
2237 * Helper function that builds a valid fixed format, current
2238 * response code and the given sense key (sk), additional sense
2239 * code (asc) and additional sense code qualifier (ascq) with
2240 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2241 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2242 *
2243 * LOCKING:
2244 * Not required
2245 */
2246
2247void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2248{
2249 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2250
2251 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2252 cmd->sense_buffer[2] = sk;
2253 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2254 cmd->sense_buffer[12] = asc;
2255 cmd->sense_buffer[13] = ascq;
2256}
2257
2258/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259 * ata_scsi_badcmd - End a SCSI request with an error
2260 * @cmd: SCSI request to be handled
2261 * @done: SCSI command completion function
2262 * @asc: SCSI-defined additional sense code
2263 * @ascq: SCSI-defined additional sense code qualifier
2264 *
2265 * Helper function that completes a SCSI command with
2266 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2267 * and the specified additional sense codes.
2268 *
2269 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002270 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 */
2272
2273void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2274{
2275 DPRINTK("ENTER\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04002276 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
2278 done(cmd);
2279}
2280
Tejun Heo77853bf2006-01-23 13:09:36 +09002281static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002282{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002283 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002284 /* FIXME: not quite right; we don't want the
2285 * translation of taskfile registers into
2286 * a sense descriptors, since that's only
2287 * correct for ATA, not ATAPI
2288 */
Tejun Heo750426a2006-11-14 22:37:35 +09002289 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002290 }
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002291
2292 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002293 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002294}
2295
2296/* is it pointless to prefer PIO for "safety reasons"? */
2297static inline int ata_pio_use_silly(struct ata_port *ap)
2298{
2299 return (ap->flags & ATA_FLAG_PIO_DMA);
2300}
2301
2302static void atapi_request_sense(struct ata_queued_cmd *qc)
2303{
2304 struct ata_port *ap = qc->ap;
2305 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002306
2307 DPRINTK("ATAPI request sense\n");
2308
Jeff Garzika939c962005-10-05 17:09:16 -04002309 /* FIXME: is this needed? */
2310 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2311
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002312 ap->ops->tf_read(ap, &qc->tf);
2313
2314 /* fill these in, for the case where they are -not- overwritten */
2315 cmd->sense_buffer[0] = 0x70;
2316 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2317
2318 ata_qc_reinit(qc);
2319
Jeff Garzika939c962005-10-05 17:09:16 -04002320 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2321 qc->dma_dir = DMA_FROM_DEVICE;
2322
Tejun Heo6e7846e2006-02-12 23:32:58 +09002323 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002324 qc->cdb[0] = REQUEST_SENSE;
2325 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2326
2327 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2328 qc->tf.command = ATA_CMD_PACKET;
2329
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002330 if (ata_pio_use_silly(ap)) {
2331 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2332 qc->tf.feature |= ATAPI_PKT_DMA;
2333 } else {
2334 qc->tf.protocol = ATA_PROT_ATAPI;
2335 qc->tf.lbam = (8 * 1024) & 0xff;
2336 qc->tf.lbah = (8 * 1024) >> 8;
2337 }
Jeff Garzika939c962005-10-05 17:09:16 -04002338 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2339
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002340 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002341
Tejun Heo8e0e6942006-03-31 20:41:11 +09002342 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002343
2344 DPRINTK("EXIT\n");
2345}
2346
Tejun Heo77853bf2006-01-23 13:09:36 +09002347static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002348{
2349 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002350 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351
Jeff Garzika7dac442005-10-30 04:44:42 -05002352 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002353
Tejun Heo246619d2006-05-15 20:58:16 +09002354 /* handle completion from new EH */
2355 if (unlikely(qc->ap->ops->error_handler &&
2356 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2357
2358 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2359 /* FIXME: not quite right; we don't want the
2360 * translation of taskfile registers into a
2361 * sense descriptors, since that's only
2362 * correct for ATA, not ATAPI
2363 */
Tejun Heo750426a2006-11-14 22:37:35 +09002364 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002365 }
2366
Tejun Heo22aac082006-08-08 14:08:59 +09002367 /* SCSI EH automatically locks door if sdev->locked is
2368 * set. Sometimes door lock request continues to
2369 * fail, for example, when no media is present. This
2370 * creates a loop - SCSI EH issues door lock which
2371 * fails and gets invoked again to acquire sense data
2372 * for the failed command.
2373 *
2374 * If door lock fails, always clear sdev->locked to
2375 * avoid this infinite loop.
2376 */
2377 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2378 qc->dev->sdev->locked = 0;
2379
Tejun Heo246619d2006-05-15 20:58:16 +09002380 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2381 qc->scsidone(cmd);
2382 ata_qc_free(qc);
2383 return;
2384 }
2385
2386 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002387 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002389 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002390 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002391 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002392 /* FIXME: not quite right; we don't want the
2393 * translation of taskfile registers into
2394 * a sense descriptors, since that's only
2395 * correct for ATA, not ATAPI
2396 */
Tejun Heo750426a2006-11-14 22:37:35 +09002397 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002398 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399 u8 *scsicmd = cmd->cmnd;
2400
Tony Battersbyfd71da42005-12-21 16:35:44 -05002401 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402 u8 *buf = NULL;
2403 unsigned int buflen;
2404
2405 buflen = ata_scsi_rbuf_get(cmd, &buf);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002406
2407 /* ATAPI devices typically report zero for their SCSI version,
2408 * and sometimes deviate from the spec WRT response data
2409 * format. If SCSI version is reported as zero like normal,
2410 * then we make the following fixups: 1) Fake MMC-5 version,
2411 * to indicate to the Linux scsi midlayer this is a modern
2412 * device. 2) Ensure response data format / ATAPI information
2413 * are always correct.
2414 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002415 if (buf[2] == 0) {
2416 buf[2] = 0x5;
2417 buf[3] = 0x32;
2418 }
2419
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 ata_scsi_rbuf_put(cmd, buf);
2421 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002422
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 cmd->result = SAM_STAT_GOOD;
2424 }
2425
2426 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002427 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428}
2429/**
2430 * atapi_xlat - Initialize PACKET taskfile
2431 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 *
2433 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002434 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435 *
2436 * RETURNS:
2437 * Zero on success, non-zero on failure.
2438 */
Tejun Heoad706992006-12-17 10:45:57 +09002439static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440{
Tejun Heo542b1442006-12-17 10:45:08 +09002441 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 struct ata_device *dev = qc->dev;
2443 int using_pio = (dev->flags & ATA_DFLAG_PIO);
Tejun Heo542b1442006-12-17 10:45:08 +09002444 int nodata = (scmd->sc_data_direction == DMA_NONE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445
2446 if (!using_pio)
2447 /* Check whether ATAPI DMA is safe */
2448 if (ata_check_atapi_dma(qc))
2449 using_pio = 1;
2450
Tejun Heo2e5704f2006-12-17 10:46:33 +09002451 memset(qc->cdb, 0, dev->cdb_len);
2452 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453
2454 qc->complete_fn = atapi_qc_complete;
2455
2456 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002457 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458 qc->tf.flags |= ATA_TFLAG_WRITE;
2459 DPRINTK("direction: write\n");
2460 }
2461
2462 qc->tf.command = ATA_CMD_PACKET;
2463
2464 /* no data, or PIO data xfer */
2465 if (using_pio || nodata) {
2466 if (nodata)
2467 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2468 else
2469 qc->tf.protocol = ATA_PROT_ATAPI;
2470 qc->tf.lbam = (8 * 1024) & 0xff;
2471 qc->tf.lbah = (8 * 1024) >> 8;
2472 }
2473
2474 /* DMA data xfer */
2475 else {
2476 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2477 qc->tf.feature |= ATAPI_PKT_DMA;
2478
Tejun Heo542b1442006-12-17 10:45:08 +09002479 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002480 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002481 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482 }
2483
Tejun Heo542b1442006-12-17 10:45:08 +09002484 qc->nbytes = scmd->request_bufflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485
2486 return 0;
2487}
2488
Tejun Heoab5b3a52006-05-31 18:27:34 +09002489static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2490{
2491 if (likely(id < ATA_MAX_DEVICES))
2492 return &ap->device[id];
2493 return NULL;
2494}
2495
2496static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2497 const struct scsi_device *scsidev)
2498{
2499 /* skip commands not addressed to targets we simulate */
2500 if (unlikely(scsidev->channel || scsidev->lun))
2501 return NULL;
2502
2503 return ata_find_dev(ap, scsidev->id);
2504}
2505
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506/**
Brian King99ba9e02006-06-12 14:54:17 -05002507 * ata_scsi_dev_enabled - determine if device is enabled
2508 * @dev: ATA device
2509 *
2510 * Determine if commands should be sent to the specified device.
2511 *
2512 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002513 * spin_lock_irqsave(host lock)
Brian King99ba9e02006-06-12 14:54:17 -05002514 *
2515 * RETURNS:
2516 * 0 if commands are not allowed / 1 if commands are allowed
2517 */
2518
2519static int ata_scsi_dev_enabled(struct ata_device *dev)
2520{
2521 if (unlikely(!ata_dev_enabled(dev)))
2522 return 0;
2523
2524 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2525 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2526 ata_dev_printk(dev, KERN_WARNING,
2527 "WARNING: ATAPI is %s, device ignored.\n",
2528 atapi_enabled ? "not supported with this driver" : "disabled");
2529 return 0;
2530 }
2531 }
2532
2533 return 1;
2534}
2535
2536/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2538 * @ap: ATA port to which the device is attached
2539 * @scsidev: SCSI device from which we derive the ATA device
2540 *
2541 * Given various information provided in struct scsi_cmnd,
2542 * map that onto an ATA bus, and using that mapping
2543 * determine which ata_device is associated with the
2544 * SCSI command to be sent.
2545 *
2546 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002547 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548 *
2549 * RETURNS:
2550 * Associated ATA device, or %NULL if not found.
2551 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002553ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002555 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556
Brian King99ba9e02006-06-12 14:54:17 -05002557 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558 return NULL;
2559
Linus Torvalds1da177e2005-04-16 15:20:36 -07002560 return dev;
2561}
2562
Jeff Garzikb0955182005-05-12 15:45:22 -04002563/*
2564 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2565 * @byte1: Byte 1 from pass-thru CDB.
2566 *
2567 * RETURNS:
2568 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2569 */
2570static u8
2571ata_scsi_map_proto(u8 byte1)
2572{
2573 switch((byte1 & 0x1e) >> 1) {
2574 case 3: /* Non-data */
2575 return ATA_PROT_NODATA;
2576
2577 case 6: /* DMA */
2578 return ATA_PROT_DMA;
2579
2580 case 4: /* PIO Data-in */
2581 case 5: /* PIO Data-out */
Jeff Garzikb0955182005-05-12 15:45:22 -04002582 return ATA_PROT_PIO;
2583
2584 case 10: /* Device Reset */
2585 case 0: /* Hard Reset */
2586 case 1: /* SRST */
2587 case 2: /* Bus Idle */
2588 case 7: /* Packet */
2589 case 8: /* DMA Queued */
2590 case 9: /* Device Diagnostic */
2591 case 11: /* UDMA Data-in */
2592 case 12: /* UDMA Data-Out */
2593 case 13: /* FPDMA */
2594 default: /* Reserved */
2595 break;
2596 }
2597
2598 return ATA_PROT_UNKNOWN;
2599}
2600
2601/**
2602 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2603 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002604 *
2605 * Handles either 12 or 16-byte versions of the CDB.
2606 *
2607 * RETURNS:
2608 * Zero on success, non-zero on failure.
2609 */
Tejun Heoad706992006-12-17 10:45:57 +09002610static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002611{
2612 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002613 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002614 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002615 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002616
Tejun Heo542b1442006-12-17 10:45:08 +09002617 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002618 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002619
Alan Coxf79d4092006-05-22 16:55:11 +01002620 /* We may not issue DMA commands if no DMA mode is set */
2621 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2622 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002623
Tejun Heo542b1442006-12-17 10:45:08 +09002624 if (cdb[1] & 0xe0)
Albert Leef59b0cf2006-03-16 17:59:22 +08002625 /* PIO multi not supported yet */
2626 goto invalid_fld;
2627
Jeff Garzikb0955182005-05-12 15:45:22 -04002628 /*
2629 * 12 and 16 byte CDBs use different offsets to
2630 * provide the various register values.
2631 */
Tejun Heo542b1442006-12-17 10:45:08 +09002632 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002633 /*
2634 * 16-byte CDB - may contain extended commands.
2635 *
2636 * If that is the case, copy the upper byte register values.
2637 */
Tejun Heo542b1442006-12-17 10:45:08 +09002638 if (cdb[1] & 0x01) {
2639 tf->hob_feature = cdb[3];
2640 tf->hob_nsect = cdb[5];
2641 tf->hob_lbal = cdb[7];
2642 tf->hob_lbam = cdb[9];
2643 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002644 tf->flags |= ATA_TFLAG_LBA48;
2645 } else
2646 tf->flags &= ~ATA_TFLAG_LBA48;
2647
2648 /*
2649 * Always copy low byte, device and command registers.
2650 */
Tejun Heo542b1442006-12-17 10:45:08 +09002651 tf->feature = cdb[4];
2652 tf->nsect = cdb[6];
2653 tf->lbal = cdb[8];
2654 tf->lbam = cdb[10];
2655 tf->lbah = cdb[12];
2656 tf->device = cdb[13];
2657 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002658 } else {
2659 /*
2660 * 12-byte CDB - incapable of extended commands.
2661 */
2662 tf->flags &= ~ATA_TFLAG_LBA48;
2663
Tejun Heo542b1442006-12-17 10:45:08 +09002664 tf->feature = cdb[3];
2665 tf->nsect = cdb[4];
2666 tf->lbal = cdb[5];
2667 tf->lbam = cdb[6];
2668 tf->lbah = cdb[7];
2669 tf->device = cdb[8];
2670 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002671 }
Mark Lorddcc2d1e2005-11-13 16:22:06 -05002672 /*
2673 * If slave is possible, enforce correct master/slave bit
2674 */
2675 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2676 tf->device = qc->dev->devno ?
2677 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002678
2679 /*
2680 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2681 * SET_FEATURES - XFER MODE must be preceded/succeeded
2682 * by an update to hardware-specific registers for each
2683 * controller (i.e. the reason for ->set_piomode(),
2684 * ->set_dmamode(), and ->post_set_mode() hooks).
2685 */
2686 if ((tf->command == ATA_CMD_SET_FEATURES)
2687 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002688 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002689
2690 /*
2691 * Set flags so that all registers will be written,
2692 * and pass on write indication (used for PIO/DMA
2693 * setup.)
2694 */
2695 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2696
Tejun Heo542b1442006-12-17 10:45:08 +09002697 if (scmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002698 tf->flags |= ATA_TFLAG_WRITE;
2699
2700 /*
2701 * Set transfer length.
2702 *
2703 * TODO: find out if we need to do more here to
2704 * cover scatter/gather case.
2705 */
Tejun Heo726f0782007-01-03 17:30:39 +09002706 qc->nbytes = scmd->request_bufflen;
Jeff Garzikb0955182005-05-12 15:45:22 -04002707
Tejun Heoe61e0672006-05-15 20:57:40 +09002708 /* request result TF */
2709 qc->flags |= ATA_QCFLAG_RESULT_TF;
2710
Jeff Garzikb0955182005-05-12 15:45:22 -04002711 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002712
2713 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002714 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002715 /* "Invalid field in cdb" */
2716 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002717}
2718
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719/**
2720 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2721 * @dev: ATA device
2722 * @cmd: SCSI command opcode to consider
2723 *
2724 * Look up the SCSI command given, and determine whether the
2725 * SCSI command is to be translated or simulated.
2726 *
2727 * RETURNS:
2728 * Pointer to translation function if possible, %NULL if not.
2729 */
2730
2731static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2732{
2733 switch (cmd) {
2734 case READ_6:
2735 case READ_10:
2736 case READ_16:
2737
2738 case WRITE_6:
2739 case WRITE_10:
2740 case WRITE_16:
2741 return ata_scsi_rw_xlat;
2742
2743 case SYNCHRONIZE_CACHE:
2744 if (ata_try_flush_cache(dev))
2745 return ata_scsi_flush_xlat;
2746 break;
2747
2748 case VERIFY:
2749 case VERIFY_16:
2750 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002751
2752 case ATA_12:
2753 case ATA_16:
2754 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002755
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002756 case START_STOP:
2757 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 }
2759
2760 return NULL;
2761}
2762
2763/**
2764 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2765 * @ap: ATA port to which the command was being sent
2766 * @cmd: SCSI command to dump
2767 *
2768 * Prints the contents of a SCSI command via printk().
2769 */
2770
2771static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2772 struct scsi_cmnd *cmd)
2773{
2774#ifdef ATA_DEBUG
2775 struct scsi_device *scsidev = cmd->device;
2776 u8 *scsicmd = cmd->cmnd;
2777
2778 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09002779 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780 scsidev->channel, scsidev->id, scsidev->lun,
2781 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2782 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2783 scsicmd[8]);
2784#endif
2785}
2786
Tejun Heo542b1442006-12-17 10:45:08 +09002787static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09002788 void (*done)(struct scsi_cmnd *),
2789 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06002790{
Tejun Heo2115ea92006-05-15 21:03:39 +09002791 int rc = 0;
2792
Tejun Heo2e5704f2006-12-17 10:46:33 +09002793 if (unlikely(!scmd->cmd_len)) {
2794 ata_dev_printk(dev, KERN_WARNING, "WARNING: zero len CDB\n");
2795 scmd->result = DID_ERROR << 16;
2796 done(scmd);
2797 return 0;
2798 }
2799
Brian Kingeb3f0f92006-03-23 17:30:02 -06002800 if (dev->class == ATA_DEV_ATA) {
2801 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
Tejun Heo542b1442006-12-17 10:45:08 +09002802 scmd->cmnd[0]);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002803
2804 if (xlat_func)
Tejun Heo542b1442006-12-17 10:45:08 +09002805 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002806 else
Tejun Heo542b1442006-12-17 10:45:08 +09002807 ata_scsi_simulate(dev, scmd, done);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002808 } else
Tejun Heo542b1442006-12-17 10:45:08 +09002809 rc = ata_scsi_translate(dev, scmd, done, atapi_xlat);
Tejun Heo2115ea92006-05-15 21:03:39 +09002810
2811 return rc;
Brian Kingeb3f0f92006-03-23 17:30:02 -06002812}
2813
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814/**
2815 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2816 * @cmd: SCSI command to be sent
2817 * @done: Completion function, called when command is complete
2818 *
2819 * In some cases, this function translates SCSI commands into
2820 * ATA taskfiles, and queues the taskfiles to be sent to
2821 * hardware. In other cases, this function simulates a
2822 * SCSI device by evaluating and responding to certain
2823 * SCSI commands. This creates the overall effect of
2824 * ATA and ATAPI devices appearing as SCSI devices.
2825 *
2826 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002827 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828 *
2829 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09002830 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2831 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2834{
2835 struct ata_port *ap;
2836 struct ata_device *dev;
2837 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05002838 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09002839 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002840
Jeff Garzik35bb94b2006-04-11 13:12:34 -04002841 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002842
2843 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04002844 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845
2846 ata_scsi_dump_cdb(ap, cmd);
2847
2848 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002849 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09002850 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002851 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852 cmd->result = (DID_BAD_TARGET << 16);
2853 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854 }
2855
Jeff Garzikba6a1302006-06-22 23:46:10 -04002856 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002857 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09002858 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859}
2860
2861/**
2862 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002863 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864 * @cmd: SCSI command being sent to device.
2865 * @done: SCSI command completion function.
2866 *
2867 * Interprets and directly executes a select list of SCSI commands
2868 * that can be handled internally.
2869 *
2870 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002871 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872 */
2873
Tejun Heo3373efd2006-05-15 20:57:53 +09002874void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875 void (*done)(struct scsi_cmnd *))
2876{
2877 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04002878 const u8 *scsicmd = cmd->cmnd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002879
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002880 args.dev = dev;
2881 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 args.cmd = cmd;
2883 args.done = done;
2884
2885 switch(scsicmd[0]) {
2886 /* no-op's, complete with success */
2887 case SYNCHRONIZE_CACHE:
2888 case REZERO_UNIT:
2889 case SEEK_6:
2890 case SEEK_10:
2891 case TEST_UNIT_READY:
2892 case FORMAT_UNIT: /* FIXME: correct? */
2893 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2894 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2895 break;
2896
2897 case INQUIRY:
2898 if (scsicmd[1] & 2) /* is CmdDt set? */
Douglas Gilbertae006512005-10-09 09:09:35 -04002899 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2901 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2902 else if (scsicmd[2] == 0x00)
2903 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2904 else if (scsicmd[2] == 0x80)
2905 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2906 else if (scsicmd[2] == 0x83)
2907 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2908 else
Douglas Gilbertae006512005-10-09 09:09:35 -04002909 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 break;
2911
2912 case MODE_SENSE:
2913 case MODE_SENSE_10:
2914 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2915 break;
2916
2917 case MODE_SELECT: /* unconditionally return */
2918 case MODE_SELECT_10: /* bad-field-in-cdb */
Douglas Gilbertae006512005-10-09 09:09:35 -04002919 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002920 break;
2921
2922 case READ_CAPACITY:
2923 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2924 break;
2925
2926 case SERVICE_ACTION_IN:
2927 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2928 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2929 else
Douglas Gilbertae006512005-10-09 09:09:35 -04002930 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 break;
2932
2933 case REPORT_LUNS:
2934 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2935 break;
2936
Jeff Garzikb0955182005-05-12 15:45:22 -04002937 /* mandatory commands we haven't implemented yet */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938 case REQUEST_SENSE:
2939
2940 /* all other commands */
2941 default:
Douglas Gilbertae006512005-10-09 09:09:35 -04002942 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2943 /* "Invalid command operation code" */
2944 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945 break;
2946 }
2947}
2948
Jeff Garzik644dd0c2005-10-03 15:55:19 -04002949void ata_scsi_scan_host(struct ata_port *ap)
2950{
2951 unsigned int i;
2952
Tejun Heo198e0fe2006-04-02 18:51:52 +09002953 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04002954 return;
2955
Jeff Garzik3f19ee82005-10-03 21:36:41 -04002956 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heo3edebac2006-05-31 18:27:40 +09002957 struct ata_device *dev = &ap->device[i];
2958 struct scsi_device *sdev;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04002959
Tejun Heo3edebac2006-05-31 18:27:40 +09002960 if (!ata_dev_enabled(dev) || dev->sdev)
2961 continue;
2962
Jeff Garzikcca39742006-08-24 03:19:22 -04002963 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
Tejun Heo3edebac2006-05-31 18:27:40 +09002964 if (!IS_ERR(sdev)) {
2965 dev->sdev = sdev;
2966 scsi_device_put(sdev);
2967 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04002968 }
Jeff Garzik644dd0c2005-10-03 15:55:19 -04002969}
Tejun Heo0ea035a2006-05-31 18:28:01 +09002970
2971/**
2972 * ata_scsi_offline_dev - offline attached SCSI device
2973 * @dev: ATA device to offline attached SCSI device for
2974 *
2975 * This function is called from ata_eh_hotplug() and responsible
2976 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04002977 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09002978 * against clearing.
2979 *
2980 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002981 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09002982 *
2983 * RETURNS:
2984 * 1 if attached SCSI device exists, 0 otherwise.
2985 */
2986int ata_scsi_offline_dev(struct ata_device *dev)
2987{
2988 if (dev->sdev) {
2989 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
2990 return 1;
2991 }
2992 return 0;
2993}
Tejun Heo580b2102006-05-31 18:28:05 +09002994
2995/**
2996 * ata_scsi_remove_dev - remove attached SCSI device
2997 * @dev: ATA device to remove attached SCSI device for
2998 *
2999 * This function is called from ata_eh_scsi_hotplug() and
3000 * responsible for removing the SCSI device attached to @dev.
3001 *
3002 * LOCKING:
3003 * Kernel thread context (may sleep).
3004 */
3005static void ata_scsi_remove_dev(struct ata_device *dev)
3006{
3007 struct ata_port *ap = dev->ap;
3008 struct scsi_device *sdev;
3009 unsigned long flags;
3010
3011 /* Alas, we need to grab scan_mutex to ensure SCSI device
3012 * state doesn't change underneath us and thus
3013 * scsi_device_get() always succeeds. The mutex locking can
3014 * be removed if there is __scsi_device_get() interface which
3015 * increments reference counts regardless of device state.
3016 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003017 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003018 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003019
Jeff Garzikcca39742006-08-24 03:19:22 -04003020 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b2102006-05-31 18:28:05 +09003021 sdev = dev->sdev;
3022 dev->sdev = NULL;
3023
3024 if (sdev) {
3025 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003026 * away underneath us after the host lock and
Tejun Heo580b2102006-05-31 18:28:05 +09003027 * scan_mutex are released. Hold onto it.
3028 */
3029 if (scsi_device_get(sdev) == 0) {
3030 /* The following ensures the attached sdev is
3031 * offline on return from ata_scsi_offline_dev()
3032 * regardless it wins or loses the race
3033 * against this function.
3034 */
3035 scsi_device_set_state(sdev, SDEV_OFFLINE);
3036 } else {
3037 WARN_ON(1);
3038 sdev = NULL;
3039 }
3040 }
3041
Jeff Garzikba6a1302006-06-22 23:46:10 -04003042 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003043 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003044
3045 if (sdev) {
3046 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3047 sdev->sdev_gendev.bus_id);
3048
3049 scsi_remove_device(sdev);
3050 scsi_device_put(sdev);
3051 }
3052}
3053
3054/**
3055 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003056 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b2102006-05-31 18:28:05 +09003057 *
3058 * Perform SCSI part of hotplug. It's executed from a separate
3059 * workqueue after EH completes. This is necessary because SCSI
3060 * hot plugging requires working EH and hot unplugging is
3061 * synchronized with hot plugging with a mutex.
3062 *
3063 * LOCKING:
3064 * Kernel thread context (may sleep).
3065 */
David Howells65f27f32006-11-22 14:55:48 +00003066void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b2102006-05-31 18:28:05 +09003067{
David Howells65f27f32006-11-22 14:55:48 +00003068 struct ata_port *ap =
3069 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo580b2102006-05-31 18:28:05 +09003070 int i;
3071
Tejun Heob51e9e52006-06-29 01:29:30 +09003072 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b2102006-05-31 18:28:05 +09003073 DPRINTK("ENTER/EXIT - unloading\n");
3074 return;
3075 }
3076
3077 DPRINTK("ENTER\n");
3078
3079 /* unplug detached devices */
3080 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3081 struct ata_device *dev = &ap->device[i];
3082 unsigned long flags;
3083
3084 if (!(dev->flags & ATA_DFLAG_DETACHED))
3085 continue;
3086
Jeff Garzikba6a1302006-06-22 23:46:10 -04003087 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003088 dev->flags &= ~ATA_DFLAG_DETACHED;
Jeff Garzikba6a1302006-06-22 23:46:10 -04003089 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003090
3091 ata_scsi_remove_dev(dev);
3092 }
3093
3094 /* scan for new ones */
3095 ata_scsi_scan_host(ap);
3096
3097 /* If we scanned while EH was in progress, scan would have
3098 * failed silently. Requeue if there are enabled but
3099 * unattached devices.
3100 */
3101 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3102 struct ata_device *dev = &ap->device[i];
3103 if (ata_dev_enabled(dev) && !dev->sdev) {
Arjan van de Ven7a44e912006-12-19 13:05:53 -08003104 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3105 round_jiffies_relative(HZ));
Tejun Heo580b2102006-05-31 18:28:05 +09003106 break;
3107 }
3108 }
3109
3110 DPRINTK("EXIT\n");
3111}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003112
3113/**
3114 * ata_scsi_user_scan - indication for user-initiated bus scan
3115 * @shost: SCSI host to scan
3116 * @channel: Channel to scan
3117 * @id: ID to scan
3118 * @lun: LUN to scan
3119 *
3120 * This function is called when user explicitly requests bus
3121 * scan. Set probe pending flag and invoke EH.
3122 *
3123 * LOCKING:
3124 * SCSI layer (we don't care)
3125 *
3126 * RETURNS:
3127 * Zero.
3128 */
3129static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3130 unsigned int id, unsigned int lun)
3131{
3132 struct ata_port *ap = ata_shost_to_port(shost);
3133 unsigned long flags;
3134 int rc = 0;
3135
3136 if (!ap->ops->error_handler)
3137 return -EOPNOTSUPP;
3138
3139 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3140 (lun != SCAN_WILD_CARD && lun != 0))
3141 return -EINVAL;
3142
Jeff Garzikba6a1302006-06-22 23:46:10 -04003143 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003144
3145 if (id == SCAN_WILD_CARD) {
3146 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3147 ap->eh_info.action |= ATA_EH_SOFTRESET;
3148 } else {
3149 struct ata_device *dev = ata_find_dev(ap, id);
3150
3151 if (dev) {
3152 ap->eh_info.probe_mask |= 1 << dev->devno;
3153 ap->eh_info.action |= ATA_EH_SOFTRESET;
Tejun Heo28324302006-07-03 16:07:26 +09003154 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003155 } else
3156 rc = -EINVAL;
3157 }
3158
Tejun Heo309afcb2006-09-30 18:07:17 +09003159 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003160 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003161 spin_unlock_irqrestore(ap->lock, flags);
3162 ata_port_wait_eh(ap);
3163 } else
3164 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003165
3166 return rc;
3167}
zhao, forrest3057ac32006-06-12 12:01:34 +08003168
3169/**
Tejun Heod0171262006-06-12 22:51:14 +09003170 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003171 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003172 *
Tejun Heod0171262006-06-12 22:51:14 +09003173 * After ATA pass thru (SAT) commands are executed successfully,
3174 * libata need to propagate the changes to SCSI layer. This
3175 * function must be executed from ata_aux_wq such that sdev
3176 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003177 *
Tejun Heod0171262006-06-12 22:51:14 +09003178 * LOCKING:
3179 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003180 */
David Howells65f27f32006-11-22 14:55:48 +00003181void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003182{
David Howells65f27f32006-11-22 14:55:48 +00003183 struct ata_port *ap =
3184 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heof84e7e42006-11-22 11:21:31 +09003185 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003186 unsigned int i;
3187
Tejun Heof84e7e42006-11-22 11:21:31 +09003188 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003189
Tejun Heof84e7e42006-11-22 11:21:31 +09003190 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3191 struct ata_device *dev = &ap->device[i];
3192 struct scsi_device *sdev = dev->sdev;
3193
3194 if (!ata_dev_enabled(dev) || !sdev)
3195 continue;
3196 if (scsi_device_get(sdev))
3197 continue;
3198
3199 spin_unlock_irqrestore(ap->lock, flags);
3200 scsi_rescan_device(&(sdev->sdev_gendev));
3201 scsi_device_put(sdev);
3202 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003203 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003204
3205 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003206}
Brian King80289162006-08-07 14:27:31 -05003207
3208/**
3209 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003210 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003211 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003212 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003213 *
3214 * LOCKING:
3215 * PCI/etc. bus probe sem.
3216 *
3217 * RETURNS:
3218 * ata_port pointer on success / NULL on failure.
3219 */
3220
Jeff Garzikcca39742006-08-24 03:19:22 -04003221struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003222 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003223 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003224{
3225 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3226 struct ata_probe_ent *ent;
3227
3228 if (!ap)
3229 return NULL;
3230
Jeff Garzikcca39742006-08-24 03:19:22 -04003231 ent = ata_probe_ent_alloc(host->dev, port_info);
Brian King80289162006-08-07 14:27:31 -05003232 if (!ent) {
3233 kfree(ap);
3234 return NULL;
3235 }
3236
Jeff Garzikcca39742006-08-24 03:19:22 -04003237 ata_port_init(ap, host, ent, 0);
3238 ap->lock = shost->host_lock;
Tejun Heo4d054472007-02-18 02:24:37 +09003239 devm_kfree(host->dev, ent);
Brian King80289162006-08-07 14:27:31 -05003240 return ap;
3241}
3242EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3243
3244/**
3245 * ata_sas_port_start - Set port up for dma.
3246 * @ap: Port to initialize
3247 *
3248 * Called just after data structures for each port are
3249 * initialized. Allocates DMA pad.
3250 *
3251 * May be used as the port_start() entry in ata_port_operations.
3252 *
3253 * LOCKING:
3254 * Inherited from caller.
3255 */
3256int ata_sas_port_start(struct ata_port *ap)
3257{
3258 return ata_pad_alloc(ap, ap->dev);
3259}
3260EXPORT_SYMBOL_GPL(ata_sas_port_start);
3261
3262/**
3263 * ata_port_stop - Undo ata_sas_port_start()
3264 * @ap: Port to shut down
3265 *
3266 * Frees the DMA pad.
3267 *
3268 * May be used as the port_stop() entry in ata_port_operations.
3269 *
3270 * LOCKING:
3271 * Inherited from caller.
3272 */
3273
3274void ata_sas_port_stop(struct ata_port *ap)
3275{
3276 ata_pad_free(ap, ap->dev);
3277}
3278EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3279
3280/**
3281 * ata_sas_port_init - Initialize a SATA device
3282 * @ap: SATA port to initialize
3283 *
3284 * LOCKING:
3285 * PCI/etc. bus probe sem.
3286 *
3287 * RETURNS:
3288 * Zero on success, non-zero on error.
3289 */
3290
3291int ata_sas_port_init(struct ata_port *ap)
3292{
3293 int rc = ap->ops->port_start(ap);
3294
3295 if (!rc)
3296 rc = ata_bus_probe(ap);
3297
3298 return rc;
3299}
3300EXPORT_SYMBOL_GPL(ata_sas_port_init);
3301
3302/**
3303 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3304 * @ap: SATA port to destroy
3305 *
3306 */
3307
3308void ata_sas_port_destroy(struct ata_port *ap)
3309{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003310 if (ap->ops->port_stop)
3311 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003312 kfree(ap);
3313}
3314EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3315
3316/**
3317 * ata_sas_slave_configure - Default slave_config routine for libata devices
3318 * @sdev: SCSI device to configure
3319 * @ap: ATA port to which SCSI device is attached
3320 *
3321 * RETURNS:
3322 * Zero.
3323 */
3324
3325int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3326{
3327 ata_scsi_sdev_config(sdev);
3328 ata_scsi_dev_config(sdev, ap->device);
3329 return 0;
3330}
3331EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3332
3333/**
3334 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3335 * @cmd: SCSI command to be sent
3336 * @done: Completion function, called when command is complete
3337 * @ap: ATA port to which the command is being sent
3338 *
3339 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003340 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3341 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003342 */
3343
3344int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3345 struct ata_port *ap)
3346{
Brian King08475a12006-11-20 13:51:56 -06003347 int rc = 0;
3348
Brian King80289162006-08-07 14:27:31 -05003349 ata_scsi_dump_cdb(ap, cmd);
3350
3351 if (likely(ata_scsi_dev_enabled(ap->device)))
Brian King08475a12006-11-20 13:51:56 -06003352 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
Brian King80289162006-08-07 14:27:31 -05003353 else {
3354 cmd->result = (DID_BAD_TARGET << 16);
3355 done(cmd);
3356 }
Brian King08475a12006-11-20 13:51:56 -06003357 return rc;
Brian King80289162006-08-07 14:27:31 -05003358}
3359EXPORT_SYMBOL_GPL(ata_sas_queuecmd);