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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
36#include <linux/kernel.h>
37#include <linux/blkdev.h>
38#include <linux/spinlock.h>
39#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <scsi/scsi_host.h>
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>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040048#include <linux/uaccess.h>
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +010049#include <linux/suspend.h>
Christoph Hellwig18f0f972009-11-17 10:00:47 -050050#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#include "libata.h"
53
Tejun Heo87340e92008-04-28 17:48:51 +090054#define SECTOR_SIZE 512
55#define ATA_SCSI_RBUF_SIZE 4096
56
57static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
58static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
Jeff Garzikb0955182005-05-12 15:45:22 -040059
Tejun Heoad706992006-12-17 10:45:57 +090060typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090061
Jeff Garzik2dcb4072007-10-19 06:42:56 -040062static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090063 const struct scsi_device *scsidev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -040064static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090065 const struct scsi_device *scsidev);
Tejun Heo83c47bc2006-05-31 18:28:07 +090066static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
67 unsigned int id, unsigned int lun);
Tejun Heoab5b3a52006-05-31 18:27:34 +090068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040070#define RW_RECOVERY_MPAGE 0x1
71#define RW_RECOVERY_MPAGE_LEN 12
72#define CACHE_MPAGE 0x8
73#define CACHE_MPAGE_LEN 20
74#define CONTROL_MPAGE 0xa
75#define CONTROL_MPAGE_LEN 12
76#define ALL_MPAGES 0x3f
77#define ALL_SUB_MPAGES 0xff
78
79
Jeff Garzik24f75682007-09-21 07:54:49 -040080static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040081 RW_RECOVERY_MPAGE,
82 RW_RECOVERY_MPAGE_LEN - 2,
Jeff Garzik24f75682007-09-21 07:54:49 -040083 (1 << 7), /* AWRE */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040084 0, /* read retry count */
85 0, 0, 0, 0,
86 0, /* write retry count */
87 0, 0, 0
88};
89
90static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 CACHE_MPAGE,
92 CACHE_MPAGE_LEN - 2,
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
96 0, 0, 0, 0, 0, 0, 0
97};
98
99static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE,
101 CONTROL_MPAGE_LEN - 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
106};
107
Tejun Heo30afc842006-03-18 18:40:14 +0900108/*
109 * libata transport template. libata doesn't do real transport stuff.
110 * It just needs the eh_timed_out hook.
111 */
Tejun Heof3187192007-04-17 23:44:07 +0900112static struct scsi_transport_template ata_scsi_transport_template = {
Christoph Hellwig9227c332006-04-01 19:21:04 +0200113 .eh_strategy_handler = ata_scsi_error,
Tejun Heo30afc842006-03-18 18:40:14 +0900114 .eh_timed_out = ata_scsi_timed_out,
Tejun Heoccf68c32006-05-31 18:28:09 +0900115 .user_scan = ata_scsi_user_scan,
Tejun Heo30afc842006-03-18 18:40:14 +0900116};
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400119static const struct {
120 enum link_pm value;
121 const char *name;
122} link_pm_policy[] = {
123 { NOT_AVAILABLE, "max_performance" },
124 { MIN_POWER, "min_power" },
125 { MAX_PERFORMANCE, "max_performance" },
126 { MEDIUM_POWER, "medium_power" },
127};
128
Adrian Bunka2d6ed12007-10-31 00:50:23 +0100129static const char *ata_scsi_lpm_get(enum link_pm policy)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400130{
131 int i;
132
133 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
134 if (link_pm_policy[i].value == policy)
135 return link_pm_policy[i].name;
136
137 return NULL;
138}
139
Tony Jonesee959b02008-02-22 00:13:36 +0100140static ssize_t ata_scsi_lpm_put(struct device *dev,
141 struct device_attribute *attr,
142 const char *buf, size_t count)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400143{
Tony Jonesee959b02008-02-22 00:13:36 +0100144 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400145 struct ata_port *ap = ata_shost_to_port(shost);
146 enum link_pm policy = 0;
147 int i;
148
149 /*
150 * we are skipping array location 0 on purpose - this
151 * is because a value of NOT_AVAILABLE is displayed
152 * to the user as max_performance, but when the user
153 * writes "max_performance", they actually want the
154 * value to match MAX_PERFORMANCE.
155 */
156 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
157 const int len = strlen(link_pm_policy[i].name);
Matthew Garrett6a744632009-11-17 11:09:03 -0500158 if (strncmp(link_pm_policy[i].name, buf, len) == 0) {
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400159 policy = link_pm_policy[i].value;
160 break;
161 }
162 }
163 if (!policy)
164 return -EINVAL;
165
166 ata_lpm_schedule(ap, policy);
167 return count;
168}
169
170static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100171ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400172{
Tony Jonesee959b02008-02-22 00:13:36 +0100173 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400174 struct ata_port *ap = ata_shost_to_port(shost);
175 const char *policy =
176 ata_scsi_lpm_get(ap->pm_policy);
177
178 if (!policy)
179 return -EINVAL;
180
181 return snprintf(buf, 23, "%s\n", policy);
182}
Tony Jonesee959b02008-02-22 00:13:36 +0100183DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400184 ata_scsi_lpm_show, ata_scsi_lpm_put);
Tony Jonesee959b02008-02-22 00:13:36 +0100185EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400186
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200187static ssize_t ata_scsi_park_show(struct device *device,
188 struct device_attribute *attr, char *buf)
189{
190 struct scsi_device *sdev = to_scsi_device(device);
191 struct ata_port *ap;
192 struct ata_link *link;
193 struct ata_device *dev;
Elias Oltmannsa4641892008-11-03 19:01:08 +0900194 unsigned long flags, now;
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200195 unsigned int uninitialized_var(msecs);
196 int rc = 0;
197
198 ap = ata_shost_to_port(sdev->host);
199
200 spin_lock_irqsave(ap->lock, flags);
201 dev = ata_scsi_find_dev(ap, sdev);
202 if (!dev) {
203 rc = -ENODEV;
204 goto unlock;
205 }
206 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
207 rc = -EOPNOTSUPP;
208 goto unlock;
209 }
210
211 link = dev->link;
Elias Oltmannsa4641892008-11-03 19:01:08 +0900212 now = jiffies;
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200213 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
214 link->eh_context.unloaded_mask & (1 << dev->devno) &&
Elias Oltmannsa4641892008-11-03 19:01:08 +0900215 time_after(dev->unpark_deadline, now))
216 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200217 else
218 msecs = 0;
219
220unlock:
221 spin_unlock_irq(ap->lock);
222
223 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
224}
225
226static ssize_t ata_scsi_park_store(struct device *device,
227 struct device_attribute *attr,
228 const char *buf, size_t len)
229{
230 struct scsi_device *sdev = to_scsi_device(device);
231 struct ata_port *ap;
232 struct ata_device *dev;
233 long int input;
234 unsigned long flags;
235 int rc;
236
237 rc = strict_strtol(buf, 10, &input);
238 if (rc || input < -2)
239 return -EINVAL;
240 if (input > ATA_TMOUT_MAX_PARK) {
241 rc = -EOVERFLOW;
242 input = ATA_TMOUT_MAX_PARK;
243 }
244
245 ap = ata_shost_to_port(sdev->host);
246
247 spin_lock_irqsave(ap->lock, flags);
248 dev = ata_scsi_find_dev(ap, sdev);
249 if (unlikely(!dev)) {
250 rc = -ENODEV;
251 goto unlock;
252 }
253 if (dev->class != ATA_DEV_ATA) {
254 rc = -EOPNOTSUPP;
255 goto unlock;
256 }
257
258 if (input >= 0) {
259 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
260 rc = -EOPNOTSUPP;
261 goto unlock;
262 }
263
264 dev->unpark_deadline = ata_deadline(jiffies, input);
265 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
266 ata_port_schedule_eh(ap);
267 complete(&ap->park_req_pending);
268 } else {
269 switch (input) {
270 case -1:
271 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
272 break;
273 case -2:
274 dev->flags |= ATA_DFLAG_NO_UNLOAD;
275 break;
276 }
277 }
278unlock:
279 spin_unlock_irqrestore(ap->lock, flags);
280
281 return rc ? rc : len;
282}
283DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
284 ata_scsi_park_show, ata_scsi_park_store);
285EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
286
Tejun Heof0761be2008-04-28 17:16:52 +0900287static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
288{
289 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
290
291 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
292}
293
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700294static ssize_t
295ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
296 const char *buf, size_t count)
297{
298 struct Scsi_Host *shost = class_to_shost(dev);
299 struct ata_port *ap = ata_shost_to_port(shost);
300 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
301 return ap->ops->em_store(ap, buf, count);
302 return -EINVAL;
303}
304
305static ssize_t
306ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
307 char *buf)
308{
309 struct Scsi_Host *shost = class_to_shost(dev);
310 struct ata_port *ap = ata_shost_to_port(shost);
311
312 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
313 return ap->ops->em_show(ap, buf);
314 return -EINVAL;
315}
Vitaly Mayatskikhea7a5ed2009-05-04 15:48:45 +0200316DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700317 ata_scsi_em_message_show, ata_scsi_em_message_store);
318EXPORT_SYMBOL_GPL(dev_attr_em_message);
319
320static ssize_t
321ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
322 char *buf)
323{
324 struct Scsi_Host *shost = class_to_shost(dev);
325 struct ata_port *ap = ata_shost_to_port(shost);
326
327 return snprintf(buf, 23, "%d\n", ap->em_message_type);
328}
329DEVICE_ATTR(em_message_type, S_IRUGO,
330 ata_scsi_em_message_type_show, NULL);
331EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
332
333static ssize_t
334ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
335 char *buf)
336{
337 struct scsi_device *sdev = to_scsi_device(dev);
338 struct ata_port *ap = ata_shost_to_port(sdev->host);
339 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340
341 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
342 return ap->ops->sw_activity_show(atadev, buf);
343 return -EINVAL;
344}
345
346static ssize_t
347ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
348 const char *buf, size_t count)
349{
350 struct scsi_device *sdev = to_scsi_device(dev);
351 struct ata_port *ap = ata_shost_to_port(sdev->host);
352 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
353 enum sw_activity val;
354 int rc;
355
356 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
357 val = simple_strtoul(buf, NULL, 0);
358 switch (val) {
359 case OFF: case BLINK_ON: case BLINK_OFF:
360 rc = ap->ops->sw_activity_store(atadev, val);
361 if (!rc)
362 return count;
363 else
364 return rc;
365 }
366 }
367 return -EINVAL;
368}
Vitaly Mayatskikhea7a5ed2009-05-04 15:48:45 +0200369DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700370 ata_scsi_activity_store);
371EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
372
Elias Oltmanns45fabbb2008-09-21 11:54:08 +0200373struct device_attribute *ata_common_sdev_attrs[] = {
374 &dev_attr_unload_heads,
375 NULL
376};
377EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
378
Douglas Gilbertae006512005-10-09 09:09:35 -0400379static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
380 void (*done)(struct scsi_cmnd *))
381{
382 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
383 /* "Invalid field in cbd" */
384 done(cmd);
385}
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387/**
388 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
389 * @sdev: SCSI device for which BIOS geometry is to be determined
390 * @bdev: block device associated with @sdev
391 * @capacity: capacity of SCSI device
392 * @geom: location to which geometry will be output
393 *
394 * Generic bios head/sector/cylinder calculator
395 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
396 * mapping. Some situations may arise where the disk is not
397 * bootable if this is not used.
398 *
399 * LOCKING:
400 * Defined by the SCSI layer. We don't really care.
401 *
402 * RETURNS:
403 * Zero.
404 */
405int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
406 sector_t capacity, int geom[])
407{
408 geom[0] = 255;
409 geom[1] = 63;
410 sector_div(capacity, 255*63);
411 geom[2] = capacity;
412
413 return 0;
414}
415
Jeff Garzikb0955182005-05-12 15:45:22 -0400416/**
Tejun Heo5924b742007-01-02 20:20:07 +0900417 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
Randy Dunlap5eb66fe2009-01-20 16:28:59 -0800418 * @ap: target port
Tejun Heo5924b742007-01-02 20:20:07 +0900419 * @sdev: SCSI device to get identify data for
420 * @arg: User buffer area for identify data
421 *
422 * LOCKING:
423 * Defined by the SCSI layer. We don't really care.
424 *
425 * RETURNS:
426 * Zero on success, negative errno on error.
427 */
Jeff Garzik94be9a52009-01-16 10:17:09 -0500428static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
429 void __user *arg)
Tejun Heo5924b742007-01-02 20:20:07 +0900430{
Tejun Heo5924b742007-01-02 20:20:07 +0900431 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
432 u16 __user *dst = arg;
433 char buf[40];
434
435 if (!dev)
436 return -ENOMSG;
437
438 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
439 return -EFAULT;
440
441 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
442 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
443 return -EFAULT;
444
445 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
446 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
447 return -EFAULT;
448
449 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
450 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
451 return -EFAULT;
452
453 return 0;
454}
455
456/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400457 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800458 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400459 * @arg: User provided data for issuing command
460 *
461 * LOCKING:
462 * Defined by the SCSI layer. We don't really care.
463 *
464 * RETURNS:
465 * Zero on success, negative errno on error.
466 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400467int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
468{
469 int rc = 0;
470 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700471 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400472 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600473 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700474 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400475
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500476 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400477 return -EINVAL;
478
479 if (copy_from_user(args, arg, sizeof(args)))
480 return -EFAULT;
481
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700482 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
483 if (!sensebuf)
484 return -ENOMEM;
485
Jeff Garzikb0955182005-05-12 15:45:22 -0400486 memset(scsi_cmd, 0, sizeof(scsi_cmd));
487
488 if (args[3]) {
489 argsize = SECTOR_SIZE * args[3];
490 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400491 if (argbuf == NULL) {
492 rc = -ENOMEM;
493 goto error;
494 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400495
496 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
497 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400498 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600499 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400500 } else {
501 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700502 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600503 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400504 }
505
506 scsi_cmd[0] = ATA_16;
507
508 scsi_cmd[4] = args[2];
Bartlomiej Zolnierkiewicza4f19042008-10-10 22:39:20 +0200509 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
Jeff Garzikb0955182005-05-12 15:45:22 -0400510 scsi_cmd[6] = args[3];
511 scsi_cmd[8] = args[1];
512 scsi_cmd[10] = 0x4f;
513 scsi_cmd[12] = 0xc2;
514 } else {
515 scsi_cmd[6] = args[1];
516 }
517 scsi_cmd[14] = args[0];
518
519 /* Good values for timeout and retries? Values below
520 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700521 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900522 sensebuf, (10*HZ), 5, 0, NULL);
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700523
524 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
525 u8 *desc = sensebuf + 8;
526 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
527
528 /* If we set cc then ATA pass-through will cause a
529 * check condition even if no error. Filter that. */
530 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
531 struct scsi_sense_hdr sshdr;
532 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400533 &sshdr);
534 if (sshdr.sense_key == 0 &&
535 sshdr.asc == 0 && sshdr.ascq == 0)
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700536 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
537 }
538
539 /* Send userspace a few ATA registers (same as drivers/ide) */
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400540 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
541 desc[0] == 0x09) { /* code is "ATA Descriptor" */
542 args[0] = desc[13]; /* status */
543 args[1] = desc[3]; /* error */
544 args[2] = desc[5]; /* sector count (0:7) */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700545 if (copy_to_user(arg, args, sizeof(args)))
546 rc = -EFAULT;
547 }
548 }
549
550
551 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400552 rc = -EIO;
553 goto error;
554 }
555
Jeff Garzikb0955182005-05-12 15:45:22 -0400556 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500557 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400558 rc = -EFAULT;
559error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700560 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700561 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400562 return rc;
563}
564
565/**
566 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800567 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400568 * @arg: User provided data for issuing command
569 *
570 * LOCKING:
571 * Defined by the SCSI layer. We don't really care.
572 *
573 * RETURNS:
574 * Zero on success, negative errno on error.
575 */
576int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
577{
578 int rc = 0;
579 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800580 u8 args[7], *sensebuf = NULL;
581 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400582
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500583 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400584 return -EINVAL;
585
586 if (copy_from_user(args, arg, sizeof(args)))
587 return -EFAULT;
588
David Milburnaf068bd2007-01-30 00:59:15 -0800589 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
590 if (!sensebuf)
591 return -ENOMEM;
592
Jeff Garzikb0955182005-05-12 15:45:22 -0400593 memset(scsi_cmd, 0, sizeof(scsi_cmd));
594 scsi_cmd[0] = ATA_16;
595 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800596 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400597 scsi_cmd[4] = args[1];
598 scsi_cmd[6] = args[2];
599 scsi_cmd[8] = args[3];
600 scsi_cmd[10] = args[4];
601 scsi_cmd[12] = args[5];
Mark Lord277239f2007-03-30 17:45:52 -0400602 scsi_cmd[13] = args[6] & 0x4f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400603 scsi_cmd[14] = args[0];
604
Jeff Garzikb0955182005-05-12 15:45:22 -0400605 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500606 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800607 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900608 sensebuf, (10*HZ), 5, 0, NULL);
Jeff Garzikb0955182005-05-12 15:45:22 -0400609
David Milburnaf068bd2007-01-30 00:59:15 -0800610 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
611 u8 *desc = sensebuf + 8;
612 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
613
614 /* If we set cc then ATA pass-through will cause a
615 * check condition even if no error. Filter that. */
616 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
617 struct scsi_sense_hdr sshdr;
618 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
619 &sshdr);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400620 if (sshdr.sense_key == 0 &&
621 sshdr.asc == 0 && sshdr.ascq == 0)
David Milburnaf068bd2007-01-30 00:59:15 -0800622 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
623 }
624
625 /* Send userspace ATA registers */
626 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
627 desc[0] == 0x09) {/* code is "ATA Descriptor" */
628 args[0] = desc[13]; /* status */
629 args[1] = desc[3]; /* error */
630 args[2] = desc[5]; /* sector count (0:7) */
631 args[3] = desc[7]; /* lbal */
632 args[4] = desc[9]; /* lbam */
633 args[5] = desc[11]; /* lbah */
634 args[6] = desc[12]; /* select */
635 if (copy_to_user(arg, args, sizeof(args)))
636 rc = -EFAULT;
637 }
638 }
639
640 if (cmd_result) {
641 rc = -EIO;
642 goto error;
643 }
644
645 error:
646 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400647 return rc;
648}
649
Alan Coxe3cf95d2009-04-09 17:31:17 +0100650static int ata_ioc32(struct ata_port *ap)
651{
652 if (ap->flags & ATA_FLAG_PIO_DMA)
653 return 1;
654 if (ap->pflags & ATA_PFLAG_PIO32)
655 return 1;
656 return 0;
657}
658
Jeff Garzik94be9a52009-01-16 10:17:09 -0500659int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
660 int cmd, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 int val = -EINVAL, rc = -EINVAL;
Alan Coxe3cf95d2009-04-09 17:31:17 +0100663 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 switch (cmd) {
666 case ATA_IOC_GET_IO32:
Alan Coxe3cf95d2009-04-09 17:31:17 +0100667 spin_lock_irqsave(ap->lock, flags);
668 val = ata_ioc32(ap);
669 spin_unlock_irqrestore(ap->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 if (copy_to_user(arg, &val, 1))
671 return -EFAULT;
672 return 0;
673
674 case ATA_IOC_SET_IO32:
675 val = (unsigned long) arg;
Alan Coxe3cf95d2009-04-09 17:31:17 +0100676 rc = 0;
677 spin_lock_irqsave(ap->lock, flags);
678 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
679 if (val)
680 ap->pflags |= ATA_PFLAG_PIO32;
681 else
682 ap->pflags &= ~ATA_PFLAG_PIO32;
683 } else {
684 if (val != ata_ioc32(ap))
685 rc = -EINVAL;
686 }
687 spin_unlock_irqrestore(ap->lock, flags);
688 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
Tejun Heo5924b742007-01-02 20:20:07 +0900690 case HDIO_GET_IDENTITY:
Jeff Garzik94be9a52009-01-16 10:17:09 -0500691 return ata_get_identity(ap, scsidev, arg);
Tejun Heo5924b742007-01-02 20:20:07 +0900692
Jeff Garzikb0955182005-05-12 15:45:22 -0400693 case HDIO_DRIVE_CMD:
694 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
695 return -EACCES;
696 return ata_cmd_ioctl(scsidev, arg);
697
698 case HDIO_DRIVE_TASK:
699 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
700 return -EACCES;
701 return ata_task_ioctl(scsidev, arg);
702
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 default:
704 rc = -ENOTTY;
705 break;
706 }
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 return rc;
709}
Jeff Garzik94be9a52009-01-16 10:17:09 -0500710EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
711
712int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
713{
714 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
715 scsidev, cmd, arg);
716}
717EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
719/**
720 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 * @dev: ATA device to which the new command is attached
722 * @cmd: SCSI command that originated this ATA command
723 * @done: SCSI command completion function
724 *
725 * Obtain a reference to an unused ata_queued_cmd structure,
726 * which is the basic libata structure representing a single
727 * ATA command sent to the hardware.
728 *
729 * If a command was available, fill in the SCSI-specific
730 * portions of the structure with information on the
731 * current command.
732 *
733 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400734 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 *
736 * RETURNS:
737 * Command allocated, or %NULL if none available.
738 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100739static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
740 struct scsi_cmnd *cmd,
741 void (*done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742{
743 struct ata_queued_cmd *qc;
744
Tejun Heo8a8bc222008-11-10 14:48:21 +0900745 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 if (qc) {
747 qc->scsicmd = cmd;
748 qc->scsidone = done;
749
Tejun Heoff2aeb12007-12-05 16:43:11 +0900750 qc->sg = scsi_sglist(cmd);
Boaz Harrosh71201652007-09-18 17:48:50 +0200751 qc->n_elem = scsi_sg_count(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 } else {
753 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
754 done(cmd);
755 }
756
757 return qc;
758}
759
Tejun Heoaacda372008-03-18 17:47:43 +0900760static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
761{
762 struct scsi_cmnd *scmd = qc->scsicmd;
763
764 qc->extrabytes = scmd->request->extra_len;
765 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
766}
767
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400769 * ata_dump_status - user friendly display of error info
770 * @id: id of the port in question
771 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400773 * Decode and dump the ATA error/status registers for the user so
774 * that they have some idea what really happened at the non
775 * make-believe layer.
776 *
777 * LOCKING:
778 * inherited from caller
779 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100780static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400781{
782 u8 stat = tf->command, err = tf->feature;
783
784 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
785 if (stat & ATA_BUSY) {
786 printk("Busy }\n"); /* Data is not valid in this case */
787 } else {
788 if (stat & 0x40) printk("DriveReady ");
789 if (stat & 0x20) printk("DeviceFault ");
790 if (stat & 0x10) printk("SeekComplete ");
791 if (stat & 0x08) printk("DataRequest ");
792 if (stat & 0x04) printk("CorrectedError ");
793 if (stat & 0x02) printk("Index ");
794 if (stat & 0x01) printk("Error ");
795 printk("}\n");
796
797 if (err) {
798 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
799 if (err & 0x04) printk("DriveStatusError ");
800 if (err & 0x80) {
801 if (err & 0x04) printk("BadCRC ");
802 else printk("Sector ");
803 }
804 if (err & 0x40) printk("UncorrectableError ");
805 if (err & 0x10) printk("SectorIdNotFound ");
806 if (err & 0x02) printk("TrackZeroNotFound ");
807 if (err & 0x01) printk("AddrMarkNotFound ");
808 printk("}\n");
809 }
810 }
811}
812
813/**
814 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800815 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400816 * @drv_stat: value contained in ATA status register
817 * @drv_err: value contained in ATA error register
818 * @sk: the sense key we'll fill out
819 * @asc: the additional sense code we'll fill out
820 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900821 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400822 *
823 * Converts an ATA error into a SCSI error. Fill out pointers to
824 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
825 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 *
827 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400828 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100830static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
831 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
Jeff Garzikb0955182005-05-12 15:45:22 -0400833 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400834
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100836 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 /* BBD|ECC|ID|MAR */
838 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
839 /* BBD|ECC|ID */
840 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
841 /* ECC|MC|MARK */
842 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
843 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
844 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
845 /* MC|ID|ABRT|TRK0|MARK */
846 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
847 /* MCR|MARK */
848 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
849 /* Bad address mark */
850 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
851 /* TRK0 */
852 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
853 /* Abort & !ICRC */
854 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
855 /* Media change request */
856 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
857 /* SRV */
858 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
859 /* Media change */
860 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
861 /* ECC */
862 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
863 /* BBD - block marked bad */
864 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
865 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
866 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100867 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 /* Must be first because BUSY means no other bits valid */
869 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
870 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
871 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
872 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
873 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
874 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 /*
877 * Is this an error we can process/parse
878 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400879 if (drv_stat & ATA_BUSY) {
880 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882
Jeff Garzikb0955182005-05-12 15:45:22 -0400883 if (drv_err) {
884 /* Look for drv_err */
885 for (i = 0; sense_table[i][0] != 0xFF; i++) {
886 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500887 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400888 sense_table[i][0]) {
889 *sk = sense_table[i][1];
890 *asc = sense_table[i][2];
891 *ascq = sense_table[i][3];
892 goto translate_done;
893 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400895 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900896 if (verbose)
897 printk(KERN_WARNING "ata%u: no sense translation for "
898 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 }
900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400902 for (i = 0; stat_table[i][0] != 0xFF; i++) {
903 if (stat_table[i][0] & drv_stat) {
904 *sk = stat_table[i][1];
905 *asc = stat_table[i][2];
906 *ascq = stat_table[i][3];
907 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400910 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900911 if (verbose)
912 printk(KERN_WARNING "ata%u: no sense translation for "
913 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
Alan Cox2d202022006-03-21 15:53:46 +0000915 /* We need a sensible error return here, which is tricky, and one
916 that won't cause people to do things like return a disk wrongly */
917 *sk = ABORTED_COMMAND;
918 *asc = 0x00;
919 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400920
921 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900922 if (verbose)
923 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
924 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
925 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400926 return;
927}
928
929/*
Tejun Heo750426a2006-11-14 22:37:35 +0900930 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400931 * @qc: Command that completed.
932 *
933 * This function is specific to the ATA descriptor format sense
934 * block specified for the ATA pass through commands. Regardless
935 * of whether the command errored or not, return a sense
936 * block. Copy all controller registers into the sense
937 * block. Clear sense key, ASC & ASCQ if there is no error.
938 *
939 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900940 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400941 */
Tejun Heo750426a2006-11-14 22:37:35 +0900942static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400943{
944 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900945 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400946 unsigned char *sb = cmd->sense_buffer;
947 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900948 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400949
950 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
951
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400952 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400953
954 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400955 * Use ata_to_sense_error() to map status register bits
956 * onto sense key, asc & ascq.
957 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900958 if (qc->err_mask ||
959 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900960 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900961 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400962 sb[1] &= 0x0f;
963 }
964
965 /*
966 * Sense data is current and format is descriptor.
967 */
968 sb[0] = 0x72;
969
970 desc[0] = 0x09;
971
Tejun Heof38621b2006-11-14 22:37:35 +0900972 /* set length of additional sense data */
973 sb[7] = 14;
974 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400975
976 /*
977 * Copy registers into sense buffer.
978 */
979 desc[2] = 0x00;
980 desc[3] = tf->feature; /* == error reg */
981 desc[5] = tf->nsect;
982 desc[7] = tf->lbal;
983 desc[9] = tf->lbam;
984 desc[11] = tf->lbah;
985 desc[12] = tf->device;
986 desc[13] = tf->command; /* == status reg */
987
988 /*
989 * Fill in Extend bit, and the high order bytes
990 * if applicable.
991 */
992 if (tf->flags & ATA_TFLAG_LBA48) {
993 desc[2] |= 0x01;
994 desc[4] = tf->hob_nsect;
995 desc[6] = tf->hob_lbal;
996 desc[8] = tf->hob_lbam;
997 desc[10] = tf->hob_lbah;
998 }
999}
1000
1001/**
Tejun Heo750426a2006-11-14 22:37:35 +09001002 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -04001003 * @qc: Command that we are erroring out
1004 *
Tejun Heod25614b2006-11-14 22:37:35 +09001005 * Generate sense block for a failed ATA command @qc. Descriptor
1006 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -04001007 *
1008 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +09001009 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -04001010 */
Tejun Heo750426a2006-11-14 22:37:35 +09001011static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04001012{
Tejun Heod25614b2006-11-14 22:37:35 +09001013 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -04001014 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +09001015 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -04001016 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +09001017 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +09001018 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +09001019 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -04001020
1021 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1022
Jeff Garzik0e5dec42005-10-06 09:40:20 -04001023 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -04001024
Tejun Heod25614b2006-11-14 22:37:35 +09001025 /* sense data is current and format is descriptor */
1026 sb[0] = 0x72;
1027
1028 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -04001029 * onto sense key, asc & ascq.
1030 */
Tejun Heo058e55e2006-04-02 18:51:53 +09001031 if (qc->err_mask ||
1032 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +09001033 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +09001034 &sb[1], &sb[2], &sb[3], verbose);
1035 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -04001036 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037
Tejun Heod25614b2006-11-14 22:37:35 +09001038 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -04001039
Tejun Heod25614b2006-11-14 22:37:35 +09001040 /* information sense data descriptor */
1041 sb[7] = 12;
1042 desc[0] = 0x00;
1043 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -05001044
Tejun Heod25614b2006-11-14 22:37:35 +09001045 desc[2] |= 0x80; /* valid */
1046 desc[6] = block >> 40;
1047 desc[7] = block >> 32;
1048 desc[8] = block >> 24;
1049 desc[9] = block >> 16;
1050 desc[10] = block >> 8;
1051 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052}
1053
Brian Kinga6cce2a2006-03-17 17:04:15 -06001054static void ata_scsi_sdev_config(struct scsi_device *sdev)
1055{
1056 sdev->use_10_for_rw = 1;
1057 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001058
1059 /* Schedule policy is determined by ->qc_defer() callback and
1060 * it needs to see every deferred qc. Set dev_blocked to 1 to
1061 * prevent SCSI midlayer from automatically deferring
1062 * requests.
1063 */
1064 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001065}
1066
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001067/**
1068 * atapi_drain_needed - Check whether data transfer may overflow
Randy Dunlap73fd8b62008-02-19 13:43:21 -08001069 * @rq: request to be checked
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001070 *
1071 * ATAPI commands which transfer variable length data to host
1072 * might overflow due to application error or hardare bug. This
1073 * function checks whether overflow should be drained and ignored
1074 * for @request.
1075 *
1076 * LOCKING:
1077 * None.
1078 *
1079 * RETURNS:
1080 * 1 if ; otherwise, 0.
1081 */
1082static int atapi_drain_needed(struct request *rq)
1083{
1084 if (likely(!blk_pc_request(rq)))
1085 return 0;
1086
Tejun Heob0790412009-05-07 22:24:42 +09001087 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_RW))
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001088 return 0;
1089
1090 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1091}
1092
1093static int ata_scsi_dev_config(struct scsi_device *sdev,
1094 struct ata_device *dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -06001095{
Elias Oltmanns45fabbb2008-09-21 11:54:08 +02001096 if (!ata_id_has_unload(dev->id))
1097 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1098
Tejun Heo914ed352006-11-01 18:39:55 +09001099 /* configure max sectors */
Martin K. Petersen086fa5f2010-02-26 00:20:38 -05001100 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -06001101
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001102 if (dev->class == ATA_DEV_ATAPI) {
1103 struct request_queue *q = sdev->request_queue;
1104 void *buf;
1105
Tejun Heoe3790c72008-03-04 11:18:17 +01001106 /* set the min alignment and padding */
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001107 blk_queue_update_dma_alignment(sdev->request_queue,
1108 ATA_DMA_PAD_SZ - 1);
FUJITA Tomonori27f82212008-07-04 09:30:03 +02001109 blk_queue_update_dma_pad(sdev->request_queue,
1110 ATA_DMA_PAD_SZ - 1);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001111
1112 /* configure draining */
1113 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1114 if (!buf) {
1115 ata_dev_printk(dev, KERN_ERR,
1116 "drain buffer allocation failed\n");
1117 return -ENOMEM;
1118 }
1119
1120 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1121 } else {
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001122 /* ATA devices must be sector aligned */
1123 blk_queue_update_dma_alignment(sdev->request_queue,
1124 ATA_SECT_SIZE - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +09001125 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +01001126 }
Tejun Heod8cf5382008-01-15 08:46:59 +09001127
Jeff Garzikf26792d2007-10-29 17:18:39 -04001128 if (dev->flags & ATA_DFLAG_AN)
1129 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1130
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001131 if (dev->flags & ATA_DFLAG_NCQ) {
1132 int depth;
1133
1134 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1135 depth = min(ATA_MAX_QUEUE - 1, depth);
Tejun Heo8a8bc222008-11-10 14:48:21 +09001136 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001137 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001138
1139 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001140}
1141
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142/**
1143 * ata_scsi_slave_config - Set SCSI device attributes
1144 * @sdev: SCSI device to examine
1145 *
1146 * This is called before we actually start reading
1147 * and writing to the device, to configure certain
1148 * SCSI mid-layer behaviors.
1149 *
1150 * LOCKING:
1151 * Defined by SCSI layer. We don't really care.
1152 */
1153
1154int ata_scsi_slave_config(struct scsi_device *sdev)
1155{
Tejun Heo31534362006-05-31 18:27:36 +09001156 struct ata_port *ap = ata_shost_to_port(sdev->host);
1157 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001158 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +09001159
Brian Kinga6cce2a2006-03-17 17:04:15 -06001160 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
Tejun Heo31534362006-05-31 18:27:36 +09001162 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001163 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001165 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166}
1167
1168/**
Tejun Heo83c47bc2006-05-31 18:28:07 +09001169 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1170 * @sdev: SCSI device to be destroyed
1171 *
1172 * @sdev is about to be destroyed for hot/warm unplugging. If
1173 * this unplugging was initiated by libata as indicated by NULL
1174 * dev->sdev, this function doesn't have to do anything.
1175 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1176 * Clear dev->sdev, schedule the device for ATA detach and invoke
1177 * EH.
1178 *
1179 * LOCKING:
1180 * Defined by SCSI layer. We don't really care.
1181 */
1182void ata_scsi_slave_destroy(struct scsi_device *sdev)
1183{
1184 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001185 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001186 unsigned long flags;
1187 struct ata_device *dev;
1188
1189 if (!ap->ops->error_handler)
1190 return;
1191
Jeff Garzikba6a1302006-06-22 23:46:10 -04001192 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09001193 dev = __ata_scsi_find_dev(ap, sdev);
1194 if (dev && dev->sdev) {
1195 /* SCSI device already in CANCEL state, no need to offline it */
1196 dev->sdev = NULL;
1197 dev->flags |= ATA_DFLAG_DETACH;
1198 ata_port_schedule_eh(ap);
1199 }
Jeff Garzikba6a1302006-06-22 23:46:10 -04001200 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001201
1202 kfree(q->dma_drain_buffer);
1203 q->dma_drain_buffer = NULL;
1204 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001205}
1206
1207/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001208 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1209 * @sdev: SCSI device to configure queue depth for
1210 * @queue_depth: new queue depth
Mike Christiee881a172009-10-15 17:46:39 -07001211 * @reason: calling context
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001212 *
1213 * This is libata standard hostt->change_queue_depth callback.
1214 * SCSI will call into this callback when user tries to set queue
1215 * depth via sysfs.
1216 *
1217 * LOCKING:
1218 * SCSI layer (we don't care)
1219 *
1220 * RETURNS:
1221 * Newly configured queue depth.
1222 */
Mike Christiee881a172009-10-15 17:46:39 -07001223int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1224 int reason)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001225{
1226 struct ata_port *ap = ata_shost_to_port(sdev->host);
1227 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001228 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001229
Mike Christiee881a172009-10-15 17:46:39 -07001230 if (reason != SCSI_QDEPTH_DEFAULT)
1231 return -EOPNOTSUPP;
1232
Tejun Heoc3c70c42007-02-20 23:31:22 +09001233 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001234 return sdev->queue_depth;
1235
1236 dev = ata_scsi_find_dev(ap, sdev);
1237 if (!dev || !ata_dev_enabled(dev))
1238 return sdev->queue_depth;
1239
Tejun Heoc3c70c42007-02-20 23:31:22 +09001240 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001241 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001242 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1243 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001244 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001245 queue_depth = 1;
1246 }
Tejun Heo360f6542006-09-30 19:45:00 +09001247 spin_unlock_irqrestore(ap->lock, flags);
1248
Tejun Heoc3c70c42007-02-20 23:31:22 +09001249 /* limit and apply queue depth */
1250 queue_depth = min(queue_depth, sdev->host->can_queue);
1251 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1252 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1253
1254 if (sdev->queue_depth == queue_depth)
1255 return -EINVAL;
1256
1257 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001258 return queue_depth;
1259}
1260
1261/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001262 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1263 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001264 *
1265 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1266 * (to start). Perhaps these commands should be preceded by
1267 * CHECK POWER MODE to see what power mode the device is already in.
1268 * [See SAT revision 5 at www.t10.org]
1269 *
1270 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001271 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001272 *
1273 * RETURNS:
1274 * Zero on success, non-zero on error.
1275 */
Tejun Heoad706992006-12-17 10:45:57 +09001276static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001277{
Tejun Heo542b1442006-12-17 10:45:08 +09001278 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001279 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001280 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001281
Tejun Heo2e5704f2006-12-17 10:46:33 +09001282 if (scmd->cmd_len < 5)
1283 goto invalid_fld;
1284
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001285 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1286 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001287 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001288 ; /* ignore IMMED bit, violates sat-r05 */
1289 }
Tejun Heo542b1442006-12-17 10:45:08 +09001290 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001291 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001292 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001293 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001294
Tejun Heo542b1442006-12-17 10:45:08 +09001295 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001296 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001297
1298 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001299 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001300
1301 tf->lbah = 0x0;
1302 tf->lbam = 0x0;
1303 tf->lbal = 0x0;
1304 tf->device |= ATA_LBA;
1305 } else {
1306 /* CHS */
1307 tf->lbal = 0x1; /* sect */
1308 tf->lbam = 0x0; /* cyl low */
1309 tf->lbah = 0x0; /* cyl high */
1310 }
1311
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001312 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001313 } else {
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001314 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1315 * or S5) causing some drives to spin up and down again.
1316 */
1317 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1318 system_state == SYSTEM_POWER_OFF)
1319 goto skip;
1320
1321 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1322 system_entering_hibernation())
1323 goto skip;
1324
Robert Hancock78981a72007-01-30 00:59:18 -08001325 /* Issue ATA STANDBY IMMEDIATE command */
1326 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001327 }
Robert Hancock78981a72007-01-30 00:59:18 -08001328
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001329 /*
1330 * Standby and Idle condition timers could be implemented but that
1331 * would require libata to implement the Power condition mode page
1332 * and allow the user to change it. Changing mode pages requires
1333 * MODE SELECT to be implemented.
1334 */
1335
1336 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001337
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001338 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001339 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001340 /* "Invalid field in cbd" */
1341 return 1;
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001342 skip:
1343 scmd->result = SAM_STAT_GOOD;
1344 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001345}
1346
1347
1348/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1350 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 *
1352 * Sets up an ATA taskfile to issue FLUSH CACHE or
1353 * FLUSH CACHE EXT.
1354 *
1355 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001356 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 *
1358 * RETURNS:
1359 * Zero on success, non-zero on error.
1360 */
Tejun Heoad706992006-12-17 10:45:57 +09001361static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362{
1363 struct ata_taskfile *tf = &qc->tf;
1364
1365 tf->flags |= ATA_TFLAG_DEVICE;
1366 tf->protocol = ATA_PROT_NODATA;
1367
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001368 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 tf->command = ATA_CMD_FLUSH_EXT;
1370 else
1371 tf->command = ATA_CMD_FLUSH;
1372
Tejun Heob666da32007-10-26 15:53:59 +09001373 /* flush is critical for IO integrity, consider it an IO command */
1374 qc->flags |= ATA_QCFLAG_IO;
1375
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 return 0;
1377}
1378
1379/**
Albert Lee3aef5232005-10-04 08:47:43 -04001380 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001381 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001382 *
1383 * Calculate LBA and transfer length for 6-byte commands.
1384 *
1385 * RETURNS:
1386 * @plba: the LBA
1387 * @plen: the transfer length
1388 */
Tejun Heo542b1442006-12-17 10:45:08 +09001389static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001390{
1391 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001392 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001393
1394 VPRINTK("six-byte command\n");
1395
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001396 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001397 lba |= ((u64)cdb[2]) << 8;
1398 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001399
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001400 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001401
1402 *plba = lba;
1403 *plen = len;
1404}
1405
1406/**
1407 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001408 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001409 *
1410 * Calculate LBA and transfer length for 10-byte commands.
1411 *
1412 * RETURNS:
1413 * @plba: the LBA
1414 * @plen: the transfer length
1415 */
Tejun Heo542b1442006-12-17 10:45:08 +09001416static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001417{
1418 u64 lba = 0;
1419 u32 len = 0;
1420
1421 VPRINTK("ten-byte command\n");
1422
Tejun Heo542b1442006-12-17 10:45:08 +09001423 lba |= ((u64)cdb[2]) << 24;
1424 lba |= ((u64)cdb[3]) << 16;
1425 lba |= ((u64)cdb[4]) << 8;
1426 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001427
Tejun Heo542b1442006-12-17 10:45:08 +09001428 len |= ((u32)cdb[7]) << 8;
1429 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001430
1431 *plba = lba;
1432 *plen = len;
1433}
1434
1435/**
1436 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001437 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001438 *
1439 * Calculate LBA and transfer length for 16-byte commands.
1440 *
1441 * RETURNS:
1442 * @plba: the LBA
1443 * @plen: the transfer length
1444 */
Tejun Heo542b1442006-12-17 10:45:08 +09001445static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001446{
1447 u64 lba = 0;
1448 u32 len = 0;
1449
1450 VPRINTK("sixteen-byte command\n");
1451
Tejun Heo542b1442006-12-17 10:45:08 +09001452 lba |= ((u64)cdb[2]) << 56;
1453 lba |= ((u64)cdb[3]) << 48;
1454 lba |= ((u64)cdb[4]) << 40;
1455 lba |= ((u64)cdb[5]) << 32;
1456 lba |= ((u64)cdb[6]) << 24;
1457 lba |= ((u64)cdb[7]) << 16;
1458 lba |= ((u64)cdb[8]) << 8;
1459 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001460
Tejun Heo542b1442006-12-17 10:45:08 +09001461 len |= ((u32)cdb[10]) << 24;
1462 len |= ((u32)cdb[11]) << 16;
1463 len |= ((u32)cdb[12]) << 8;
1464 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001465
1466 *plba = lba;
1467 *plen = len;
1468}
1469
1470/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1472 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 *
1474 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1475 *
1476 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001477 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 *
1479 * RETURNS:
1480 * Zero on success, non-zero on error.
1481 */
Tejun Heoad706992006-12-17 10:45:57 +09001482static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483{
Tejun Heo542b1442006-12-17 10:45:08 +09001484 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001486 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001488 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001489 u64 block;
1490 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491
1492 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1493 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494
Tejun Heo2e5704f2006-12-17 10:46:33 +09001495 if (cdb[0] == VERIFY) {
1496 if (scmd->cmd_len < 10)
1497 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001498 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001499 } else if (cdb[0] == VERIFY_16) {
1500 if (scmd->cmd_len < 16)
1501 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001502 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001503 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001504 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505
Albert Lee8bf62ec2005-05-12 15:29:42 -04001506 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001507 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001508 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001509 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001510 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001511 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512
Albert Lee07506692005-10-12 15:04:18 +08001513 if (dev->flags & ATA_DFLAG_LBA) {
1514 tf->flags |= ATA_TFLAG_LBA;
1515
Albert Leec6a33e22005-10-12 15:12:26 +08001516 if (lba_28_ok(block, n_block)) {
1517 /* use LBA28 */
1518 tf->command = ATA_CMD_VERIFY;
1519 tf->device |= (block >> 24) & 0xf;
1520 } else if (lba_48_ok(block, n_block)) {
1521 if (!(dev->flags & ATA_DFLAG_LBA48))
1522 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001523
1524 /* use LBA48 */
1525 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001526 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Albert Lee8bf62ec2005-05-12 15:29:42 -04001528 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Albert Lee8bf62ec2005-05-12 15:29:42 -04001530 tf->hob_lbah = (block >> 40) & 0xff;
1531 tf->hob_lbam = (block >> 32) & 0xff;
1532 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001533 } else
1534 /* request too large even for LBA48 */
1535 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001536
1537 tf->nsect = n_block & 0xff;
1538
1539 tf->lbah = (block >> 16) & 0xff;
1540 tf->lbam = (block >> 8) & 0xff;
1541 tf->lbal = block & 0xff;
1542
1543 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001545 /* CHS */
1546 u32 sect, head, cyl, track;
1547
Albert Leec6a33e22005-10-12 15:12:26 +08001548 if (!lba_28_ok(block, n_block))
1549 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001550
Albert Lee8bf62ec2005-05-12 15:29:42 -04001551 /* Convert LBA to CHS */
1552 track = (u32)block / dev->sectors;
1553 cyl = track / dev->heads;
1554 head = track % dev->heads;
1555 sect = (u32)block % dev->sectors + 1;
1556
Albert Leec187c4b2005-10-04 08:46:51 -04001557 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1558 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001559
1560 /* Check whether the converted CHS can fit.
1561 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001562 Head: 0-15
1563 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001564 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001565 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001566
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001568 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1569 tf->lbal = sect;
1570 tf->lbam = cyl;
1571 tf->lbah = cyl >> 8;
1572 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 }
1574
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001576
1577invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001578 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001579 /* "Invalid field in cbd" */
1580 return 1;
1581
1582out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001583 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001584 /* "Logical Block Address out of range" */
1585 return 1;
1586
1587nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001588 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001589 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590}
1591
1592/**
1593 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1594 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 *
1596 * Converts any of six SCSI read/write commands into the
1597 * ATA counterpart, including starting sector (LBA),
1598 * sector count, and taking into account the device's LBA48
1599 * support.
1600 *
1601 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1602 * %WRITE_16 are currently supported.
1603 *
1604 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001605 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 *
1607 * RETURNS:
1608 * Zero on success, non-zero on error.
1609 */
Tejun Heoad706992006-12-17 10:45:57 +09001610static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611{
Tejun Heo542b1442006-12-17 10:45:08 +09001612 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001613 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001614 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001615 u64 block;
1616 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001617 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618
Tejun Heo542b1442006-12-17 10:45:08 +09001619 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001620 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001622 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001623 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001624 case READ_10:
1625 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001626 if (unlikely(scmd->cmd_len < 10))
1627 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001628 scsi_10_lba_len(cdb, &block, &n_block);
1629 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001630 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001631 break;
1632 case READ_6:
1633 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001634 if (unlikely(scmd->cmd_len < 6))
1635 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001636 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001637
1638 /* for 6-byte r/w commands, transfer length 0
1639 * means 256 blocks of data, not 0 block.
1640 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001641 if (!n_block)
1642 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001643 break;
1644 case READ_16:
1645 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001646 if (unlikely(scmd->cmd_len < 16))
1647 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001648 scsi_16_lba_len(cdb, &block, &n_block);
1649 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001650 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001651 break;
1652 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001653 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001654 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 }
1656
Albert Lee8bf62ec2005-05-12 15:29:42 -04001657 /* Check and compose ATA command */
1658 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001659 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1660 * length 0 means transfer 0 block of data.
1661 * However, for ATA R/W commands, sector count 0 means
1662 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001663 *
1664 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001665 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001666 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001667
Tejun Heobd056d72006-11-14 22:47:10 +09001668 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001669 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001670
Tejun Heobd056d72006-11-14 22:47:10 +09001671 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1672 qc->tag);
1673 if (likely(rc == 0))
1674 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001675
Tejun Heobd056d72006-11-14 22:47:10 +09001676 if (rc == -ERANGE)
1677 goto out_of_range;
1678 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001679invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001680 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001681 /* "Invalid field in cbd" */
1682 return 1;
1683
1684out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001685 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001686 /* "Logical Block Address out of range" */
1687 return 1;
1688
1689nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001690 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001691 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692}
1693
Tejun Heo77853bf2006-01-23 13:09:36 +09001694static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695{
Tejun Heoc31f5712006-11-22 12:39:43 +09001696 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001698 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001699 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700
Jeff Garzikb0955182005-05-12 15:45:22 -04001701 /* For ATA pass thru (SAT) commands, generate a sense block if
1702 * user mandated it or if there's an error. Note that if we
1703 * generate because the user forced us to, a check condition
1704 * is generated and the ATA register values are returned
1705 * whether the command completed successfully or not. If there
1706 * was no error, SK, ASC and ASCQ will all be zero.
1707 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001708 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001709 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001710 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001711 } else {
1712 if (!need_sense) {
1713 cmd->result = SAM_STAT_GOOD;
1714 } else {
1715 /* TODO: decide which descriptor format to use
1716 * for 48b LBA devices and call that here
1717 * instead of the fixed desc, which is only
1718 * good for smaller LBA (and maybe CHS?)
1719 * devices.
1720 */
Tejun Heo750426a2006-11-14 22:37:35 +09001721 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001722 }
1723 }
1724
Tejun Heoc31f5712006-11-22 12:39:43 +09001725 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001726 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727
1728 qc->scsidone(cmd);
1729
Tejun Heo77853bf2006-01-23 13:09:36 +09001730 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731}
1732
1733/**
1734 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735 * @dev: ATA device to which the command is addressed
1736 * @cmd: SCSI command to execute
1737 * @done: SCSI command completion function
1738 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1739 *
1740 * Our ->queuecommand() function has decided that the SCSI
1741 * command issued can be directly translated into an ATA
1742 * command, rather than handled internally.
1743 *
1744 * This function sets up an ata_queued_cmd structure for the
1745 * SCSI command, and sends that ata_queued_cmd to the hardware.
1746 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001747 * The xlat_func argument (actor) returns 0 if ready to execute
1748 * ATA command, else 1 to finish translation. If 1 is returned
1749 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1750 * to be set reflecting an error condition or clean (early)
1751 * termination.
1752 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001754 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001755 *
1756 * RETURNS:
1757 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1758 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001760static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1761 void (*done)(struct scsi_cmnd *),
1762 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001764 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001766 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767
1768 VPRINTK("ENTER\n");
1769
Tejun Heo3373efd2006-05-15 20:57:53 +09001770 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001772 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773
1774 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001775 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1776 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001777 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001778 ata_dev_printk(dev, KERN_WARNING,
1779 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001780 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 }
1782
Boaz Harrosh71201652007-09-18 17:48:50 +02001783 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784
1785 qc->dma_dir = cmd->sc_data_direction;
1786 }
1787
1788 qc->complete_fn = ata_scsi_qc_complete;
1789
Tejun Heoad706992006-12-17 10:45:57 +09001790 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001791 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792
Tejun Heo31cc23b2007-09-23 13:14:12 +09001793 if (ap->ops->qc_defer) {
1794 if ((rc = ap->ops->qc_defer(qc)))
1795 goto defer;
1796 }
1797
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001799 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800
1801 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001802 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803
Douglas Gilbertae006512005-10-09 09:09:35 -04001804early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001805 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001806 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001807 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001808 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001809
1810err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001812 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001813 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001814err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001815 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001816 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001817
1818defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001819 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001820 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001821 if (rc == ATA_DEFER_LINK)
1822 return SCSI_MLQUEUE_DEVICE_BUSY;
1823 else
1824 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825}
1826
1827/**
1828 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001829 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001830 * @flags: unsigned long variable to store irq enable status
1831 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 *
Tejun Heo87340e92008-04-28 17:48:51 +09001833 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 *
1835 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001836 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837 *
1838 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001839 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 */
Tejun Heo87340e92008-04-28 17:48:51 +09001841static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1842 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843{
Tejun Heo87340e92008-04-28 17:48:51 +09001844 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845
Tejun Heo87340e92008-04-28 17:48:51 +09001846 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1847 if (copy_in)
1848 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1849 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1850 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851}
1852
1853/**
1854 * ata_scsi_rbuf_put - Unmap response buffer.
1855 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001856 * @copy_out: copy out result
1857 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 *
Tejun Heo87340e92008-04-28 17:48:51 +09001859 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1860 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 *
1862 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001863 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 */
Tejun Heo87340e92008-04-28 17:48:51 +09001865static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1866 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867{
Tejun Heo87340e92008-04-28 17:48:51 +09001868 if (copy_out)
1869 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1870 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1871 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872}
1873
1874/**
1875 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1876 * @args: device IDENTIFY data / SCSI command of interest.
1877 * @actor: Callback hook for desired SCSI command simulator
1878 *
1879 * Takes care of the hard work of simulating a SCSI command...
1880 * Mapping the response buffer, calling the command's handler,
1881 * and handling the handler's return value. This return value
1882 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001883 * completed successfully (0), or not (in which case cmd->result
1884 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 *
1886 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001887 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 */
Tejun Heof0761be2008-04-28 17:16:52 +09001889static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001890 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891{
1892 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001893 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001895 unsigned long flags;
1896
Tejun Heo87340e92008-04-28 17:48:51 +09001897 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1898 rc = actor(args, rbuf);
1899 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001900
Douglas Gilbertae006512005-10-09 09:09:35 -04001901 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001903 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904}
1905
1906/**
1907 * ata_scsiop_inq_std - Simulate INQUIRY command
1908 * @args: device IDENTIFY data / SCSI command of interest.
1909 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 *
1911 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001912 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 *
1914 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001915 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 */
Tejun Heo87340e92008-04-28 17:48:51 +09001917static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918{
Tejun Heo87340e92008-04-28 17:48:51 +09001919 const u8 versions[] = {
1920 0x60, /* SAM-3 (no version claimed) */
1921
1922 0x03,
1923 0x20, /* SBC-2 (no version claimed) */
1924
1925 0x02,
1926 0x60 /* SPC-3 (no version claimed) */
1927 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928 u8 hdr[] = {
1929 TYPE_DISK,
1930 0,
1931 0x5, /* claim SPC-3 version compatibility */
1932 2,
1933 95 - 4
1934 };
1935
Tejun Heo87340e92008-04-28 17:48:51 +09001936 VPRINTK("ENTER\n");
1937
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 /* set scsi removeable (RMB) bit per ata bit */
1939 if (ata_id_removeable(args->id))
1940 hdr[1] |= (1 << 7);
1941
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001943 memcpy(&rbuf[8], "ATA ", 8);
1944 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1945 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946
Tejun Heo87340e92008-04-28 17:48:51 +09001947 if (rbuf[32] == 0 || rbuf[32] == ' ')
1948 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949
Tejun Heo87340e92008-04-28 17:48:51 +09001950 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951
1952 return 0;
1953}
1954
1955/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001956 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 * @args: device IDENTIFY data / SCSI command of interest.
1958 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001960 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 *
1962 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001963 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 */
Tejun Heo87340e92008-04-28 17:48:51 +09001965static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966{
1967 const u8 pages[] = {
1968 0x00, /* page 0x00, this page */
1969 0x80, /* page 0x80, unit serial no page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001970 0x83, /* page 0x83, device ident page */
1971 0x89, /* page 0x89, ata info page */
Christoph Hellwig18f0f972009-11-17 10:00:47 -05001972 0xb0, /* page 0xb0, block limits page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001973 0xb1, /* page 0xb1, block device characteristics page */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 };
Tejun Heo87340e92008-04-28 17:48:51 +09001975
Jeff Garzikb142eb62006-03-21 20:37:47 -05001976 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09001977 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 return 0;
1979}
1980
1981/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001982 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 * @args: device IDENTIFY data / SCSI command of interest.
1984 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 *
1986 * Returns ATA device serial number.
1987 *
1988 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001989 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 */
Tejun Heo87340e92008-04-28 17:48:51 +09001991static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992{
1993 const u8 hdr[] = {
1994 0,
1995 0x80, /* this page code */
1996 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001997 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 };
Tejun Heo87340e92008-04-28 17:48:51 +09001999
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09002001 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2002 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 return 0;
2004}
2005
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002007 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 * @args: device IDENTIFY data / SCSI command of interest.
2009 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002010 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05002011 * Yields two logical unit device identification designators:
2012 * - vendor specific ASCII containing the ATA serial number
2013 * - SAT defined "t10 vendor id based" containing ASCII vendor
2014 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 *
2016 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002017 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 */
Tejun Heo87340e92008-04-28 17:48:51 +09002019static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020{
Jeff Garzikb142eb62006-03-21 20:37:47 -05002021 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09002022 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05002023
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05002025 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026
Tejun Heo87340e92008-04-28 17:48:51 +09002027 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2028 rbuf[num + 0] = 2;
2029 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2030 num += 4;
2031 ata_id_string(args->id, (unsigned char *) rbuf + num,
2032 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2033 num += ATA_ID_SERNO_LEN;
2034
2035 /* SAT defined lu model and serial numbers descriptor */
2036 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2037 rbuf[num + 0] = 2;
2038 rbuf[num + 1] = 1;
2039 rbuf[num + 3] = sat_model_serial_desc_len;
2040 num += 4;
2041 memcpy(rbuf + num, "ATA ", 8);
2042 num += 8;
2043 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2044 ATA_ID_PROD_LEN);
2045 num += ATA_ID_PROD_LEN;
2046 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2047 ATA_ID_SERNO_LEN);
2048 num += ATA_ID_SERNO_LEN;
2049
Jeff Garzikb142eb62006-03-21 20:37:47 -05002050 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 return 0;
2052}
2053
2054/**
Jeff Garzikad355b42007-09-21 20:38:03 -04002055 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2056 * @args: device IDENTIFY data / SCSI command of interest.
2057 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04002058 *
2059 * Yields SAT-specified ATA VPD page.
2060 *
2061 * LOCKING:
2062 * spin_lock_irqsave(host lock)
2063 */
Tejun Heo87340e92008-04-28 17:48:51 +09002064static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04002065{
Jeff Garzikad355b42007-09-21 20:38:03 -04002066 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04002067
Jeff Garzikad355b42007-09-21 20:38:03 -04002068 memset(&tf, 0, sizeof(tf));
2069
Tejun Heo87340e92008-04-28 17:48:51 +09002070 rbuf[1] = 0x89; /* our page code */
2071 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2072 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04002073
Tejun Heo87340e92008-04-28 17:48:51 +09002074 memcpy(&rbuf[8], "linux ", 8);
2075 memcpy(&rbuf[16], "libata ", 16);
2076 memcpy(&rbuf[32], DRV_VERSION, 4);
2077 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04002078
2079 /* we don't store the ATA device signature, so we fake it */
2080
2081 tf.command = ATA_DRDY; /* really, this is Status reg */
2082 tf.lbal = 0x1;
2083 tf.nsect = 0x1;
2084
Tejun Heo87340e92008-04-28 17:48:51 +09002085 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2086 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04002087
Tejun Heo87340e92008-04-28 17:48:51 +09002088 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04002089
Tejun Heo87340e92008-04-28 17:48:51 +09002090 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04002091 return 0;
2092}
2093
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002094static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2095{
2096 u32 min_io_sectors;
2097
2098 rbuf[1] = 0xb0;
2099 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2100
2101 /*
2102 * Optimal transfer length granularity.
2103 *
2104 * This is always one physical block, but for disks with a smaller
2105 * logical than physical sector size we need to figure out what the
2106 * latter is.
2107 */
2108 if (ata_id_has_large_logical_sectors(args->id))
2109 min_io_sectors = ata_id_logical_per_physical_sectors(args->id);
2110 else
2111 min_io_sectors = 1;
2112 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2113
2114 /*
2115 * Optimal unmap granularity.
2116 *
2117 * The ATA spec doesn't even know about a granularity or alignment
2118 * for the TRIM command. We can leave away most of the unmap related
2119 * VPD page entries, but we have specifify a granularity to signal
2120 * that we support some form of unmap - in thise case via WRITE SAME
2121 * with the unmap bit set.
2122 */
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002123 if (ata_id_has_trim(args->id)) {
2124 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002125 put_unaligned_be32(1, &rbuf[28]);
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002126 }
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002127
2128 return 0;
2129}
2130
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002131static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2132{
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002133 int form_factor = ata_id_form_factor(args->id);
2134 int media_rotation_rate = ata_id_rotation_rate(args->id);
2135
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002136 rbuf[1] = 0xb1;
2137 rbuf[3] = 0x3c;
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002138 rbuf[4] = media_rotation_rate >> 8;
2139 rbuf[5] = media_rotation_rate;
2140 rbuf[7] = form_factor;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002141
2142 return 0;
2143}
2144
Jeff Garzikad355b42007-09-21 20:38:03 -04002145/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002146 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 * @args: device IDENTIFY data / SCSI command of interest.
2148 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 *
2150 * No operation. Simply returns success to caller, to indicate
2151 * that the caller should successfully complete this SCSI command.
2152 *
2153 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002154 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 */
Tejun Heo87340e92008-04-28 17:48:51 +09002156static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157{
2158 VPRINTK("ENTER\n");
2159 return 0;
2160}
2161
2162/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 * ata_msense_caching - Simulate MODE SENSE caching info page
2164 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09002165 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 *
2167 * Generate a caching info page, which conditionally indicates
2168 * write caching to the SCSI layer, depending on device
2169 * capabilities.
2170 *
2171 * LOCKING:
2172 * None.
2173 */
Tejun Heo87340e92008-04-28 17:48:51 +09002174static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175{
Tejun Heo87340e92008-04-28 17:48:51 +09002176 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002178 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002180 buf[12] |= (1 << 5); /* disable read ahead */
2181 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182}
2183
2184/**
2185 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09002186 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 *
2188 * Generate a generic MODE SENSE control mode page.
2189 *
2190 * LOCKING:
2191 * None.
2192 */
Tejun Heo87340e92008-04-28 17:48:51 +09002193static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194{
Tejun Heo87340e92008-04-28 17:48:51 +09002195 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002196 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197}
2198
2199/**
2200 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07002201 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202 *
2203 * Generate a generic MODE SENSE r/w error recovery page.
2204 *
2205 * LOCKING:
2206 * None.
2207 */
Tejun Heo87340e92008-04-28 17:48:51 +09002208static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209{
Tejun Heo87340e92008-04-28 17:48:51 +09002210 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002211 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212}
2213
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002214/*
2215 * We can turn this into a real blacklist if it's needed, for now just
2216 * blacklist any Maxtor BANC1G10 revision firmware
2217 */
2218static int ata_dev_supports_fua(u16 *id)
2219{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002220 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002221
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002222 if (!libata_fua)
2223 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002224 if (!ata_id_has_fua(id))
2225 return 0;
2226
Tejun Heoa0cf7332007-01-02 20:18:49 +09002227 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2228 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002229
Tejun Heo2e026712006-02-12 22:47:04 +09002230 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002231 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002232 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002233 return 1;
2234
2235 return 0; /* blacklisted */
2236}
2237
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238/**
2239 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2240 * @args: device IDENTIFY data / SCSI command of interest.
2241 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002243 * Simulate MODE SENSE commands. Assume this is invoked for direct
2244 * access devices (e.g. disks) only. There should be no block
2245 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 *
2247 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002248 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249 */
Tejun Heo87340e92008-04-28 17:48:51 +09002250static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002252 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002253 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002254 const u8 sat_blk_desc[] = {
2255 0, 0, 0, 0, /* number of blocks: sat unspecified */
2256 0,
2257 0, 0x2, 0x0 /* block length: 512 bytes */
2258 };
2259 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002260 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002261 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262
2263 VPRINTK("ENTER\n");
2264
2265 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002266 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2267 /*
2268 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002270
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002272 switch (page_control) {
2273 case 0: /* current */
2274 break; /* supported */
2275 case 3: /* saved */
2276 goto saving_not_supp;
2277 case 1: /* changeable */
2278 case 2: /* defaults */
2279 default:
2280 goto invalid_fld;
2281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282
Tejun Heo87340e92008-04-28 17:48:51 +09002283 if (six_byte)
2284 p += 4 + (ebd ? 8 : 0);
2285 else
2286 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002288 pg = scsicmd[2] & 0x3f;
2289 spg = scsicmd[3];
2290 /*
2291 * No mode subpages supported (yet) but asking for _all_
2292 * subpages may be valid
2293 */
2294 if (spg && (spg != ALL_SUB_MPAGES))
2295 goto invalid_fld;
2296
2297 switch(pg) {
2298 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002299 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 break;
2301
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002302 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002303 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304 break;
2305
Tejun Heo87340e92008-04-28 17:48:51 +09002306 case CONTROL_MPAGE:
2307 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002310 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002311 p += ata_msense_rw_recovery(p);
2312 p += ata_msense_caching(args->id, p);
2313 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 break;
2315
2316 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002317 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 }
2319
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002320 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002321 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002322 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2323 dpofua = 1 << 4;
2324
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002326 rbuf[0] = p - rbuf - 1;
2327 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002328 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002329 rbuf[3] = sizeof(sat_blk_desc);
2330 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002331 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002333 unsigned int output_len = p - rbuf - 2;
2334
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002336 rbuf[1] = output_len;
2337 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002338 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002339 rbuf[7] = sizeof(sat_blk_desc);
2340 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002341 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002344
2345invalid_fld:
2346 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2347 /* "Invalid field in cbd" */
2348 return 1;
2349
2350saving_not_supp:
2351 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2352 /* "Saving parameters not supported" */
2353 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354}
2355
2356/**
2357 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2358 * @args: device IDENTIFY data / SCSI command of interest.
2359 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360 *
2361 * Simulate READ CAPACITY commands.
2362 *
2363 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002364 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 */
Tejun Heo87340e92008-04-28 17:48:51 +09002366static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367{
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002368 struct ata_device *dev = args->dev;
2369 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2370 u8 log_per_phys = 0;
2371 u16 lowest_aligned = 0;
2372 u16 word_106 = dev->id[106];
2373 u16 word_209 = dev->id[209];
2374
2375 if ((word_106 & 0xc000) == 0x4000) {
2376 /* Number and offset of logical sectors per physical sector */
2377 if (word_106 & (1 << 13))
2378 log_per_phys = word_106 & 0xf;
2379 if ((word_209 & 0xc000) == 0x4000) {
2380 u16 first = dev->id[209] & 0x3fff;
2381 if (first > 0)
2382 lowest_aligned = (1 << log_per_phys) - first;
2383 }
2384 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385
2386 VPRINTK("ENTER\n");
2387
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002389 if (last_lba >= 0xffffffffULL)
2390 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002391
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002393 rbuf[0] = last_lba >> (8 * 3);
2394 rbuf[1] = last_lba >> (8 * 2);
2395 rbuf[2] = last_lba >> (8 * 1);
2396 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397
2398 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002399 rbuf[6] = ATA_SECT_SIZE >> 8;
2400 rbuf[7] = ATA_SECT_SIZE & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002401 } else {
2402 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002403 rbuf[0] = last_lba >> (8 * 7);
2404 rbuf[1] = last_lba >> (8 * 6);
2405 rbuf[2] = last_lba >> (8 * 5);
2406 rbuf[3] = last_lba >> (8 * 4);
2407 rbuf[4] = last_lba >> (8 * 3);
2408 rbuf[5] = last_lba >> (8 * 2);
2409 rbuf[6] = last_lba >> (8 * 1);
2410 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411
2412 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002413 rbuf[10] = ATA_SECT_SIZE >> 8;
2414 rbuf[11] = ATA_SECT_SIZE & 0xff;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002415
2416 rbuf[12] = 0;
2417 rbuf[13] = log_per_phys;
2418 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2419 rbuf[15] = lowest_aligned;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002420
Martin K. Petersene78db4d2009-11-26 22:46:03 -05002421 if (ata_id_has_trim(args->id)) {
2422 rbuf[14] |= 0x80; /* TPE */
2423
2424 if (ata_id_has_zero_after_trim(args->id))
2425 rbuf[14] |= 0x40; /* TPRZ */
2426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 }
2428
2429 return 0;
2430}
2431
2432/**
2433 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2434 * @args: device IDENTIFY data / SCSI command of interest.
2435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 *
2437 * Simulate REPORT LUNS command.
2438 *
2439 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002440 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 */
Tejun Heo87340e92008-04-28 17:48:51 +09002442static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443{
2444 VPRINTK("ENTER\n");
2445 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2446
2447 return 0;
2448}
2449
Tejun Heo77853bf2006-01-23 13:09:36 +09002450static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002451{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002452 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002453 /* FIXME: not quite right; we don't want the
2454 * translation of taskfile registers into
2455 * a sense descriptors, since that's only
2456 * correct for ATA, not ATAPI
2457 */
Tejun Heo750426a2006-11-14 22:37:35 +09002458 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002459 }
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002460
2461 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002462 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002463}
2464
2465/* is it pointless to prefer PIO for "safety reasons"? */
2466static inline int ata_pio_use_silly(struct ata_port *ap)
2467{
2468 return (ap->flags & ATA_FLAG_PIO_DMA);
2469}
2470
2471static void atapi_request_sense(struct ata_queued_cmd *qc)
2472{
2473 struct ata_port *ap = qc->ap;
2474 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002475
2476 DPRINTK("ATAPI request sense\n");
2477
Jeff Garzika939c962005-10-05 17:09:16 -04002478 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002479 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002480
Tejun Heo127102a2008-04-07 22:47:21 +09002481#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002482 if (ap->ops->sff_tf_read)
2483 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002484#endif
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002485
2486 /* fill these in, for the case where they are -not- overwritten */
2487 cmd->sense_buffer[0] = 0x70;
2488 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2489
2490 ata_qc_reinit(qc);
2491
Tejun Heo93f8fec2007-12-05 16:43:01 +09002492 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002493 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002494 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002495 qc->dma_dir = DMA_FROM_DEVICE;
2496
Tejun Heo6e7846e2006-02-12 23:32:58 +09002497 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002498 qc->cdb[0] = REQUEST_SENSE;
2499 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2500
2501 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2502 qc->tf.command = ATA_CMD_PACKET;
2503
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002504 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002505 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002506 qc->tf.feature |= ATAPI_PKT_DMA;
2507 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002508 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002509 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2510 qc->tf.lbah = 0;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002511 }
Jeff Garzika939c962005-10-05 17:09:16 -04002512 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2513
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002514 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002515
Tejun Heo8e0e6942006-03-31 20:41:11 +09002516 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002517
2518 DPRINTK("EXIT\n");
2519}
2520
Tejun Heo77853bf2006-01-23 13:09:36 +09002521static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522{
2523 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002524 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525
Jeff Garzika7dac442005-10-30 04:44:42 -05002526 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002527
Tejun Heo246619d2006-05-15 20:58:16 +09002528 /* handle completion from new EH */
2529 if (unlikely(qc->ap->ops->error_handler &&
2530 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2531
2532 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2533 /* FIXME: not quite right; we don't want the
2534 * translation of taskfile registers into a
2535 * sense descriptors, since that's only
2536 * correct for ATA, not ATAPI
2537 */
Tejun Heo750426a2006-11-14 22:37:35 +09002538 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002539 }
2540
Tejun Heo22aac082006-08-08 14:08:59 +09002541 /* SCSI EH automatically locks door if sdev->locked is
2542 * set. Sometimes door lock request continues to
2543 * fail, for example, when no media is present. This
2544 * creates a loop - SCSI EH issues door lock which
2545 * fails and gets invoked again to acquire sense data
2546 * for the failed command.
2547 *
2548 * If door lock fails, always clear sdev->locked to
2549 * avoid this infinite loop.
2550 */
2551 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2552 qc->dev->sdev->locked = 0;
2553
Tejun Heo246619d2006-05-15 20:58:16 +09002554 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2555 qc->scsidone(cmd);
2556 ata_qc_free(qc);
2557 return;
2558 }
2559
2560 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002561 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002563 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002564 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002565 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002566 /* FIXME: not quite right; we don't want the
2567 * translation of taskfile registers into
2568 * a sense descriptors, since that's only
2569 * correct for ATA, not ATAPI
2570 */
Tejun Heo750426a2006-11-14 22:37:35 +09002571 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002572 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573 u8 *scsicmd = cmd->cmnd;
2574
Tony Battersbyfd71da42005-12-21 16:35:44 -05002575 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002576 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002577 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002578
Tejun Heo87340e92008-04-28 17:48:51 +09002579 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002580
2581 /* ATAPI devices typically report zero for their SCSI version,
2582 * and sometimes deviate from the spec WRT response data
2583 * format. If SCSI version is reported as zero like normal,
2584 * then we make the following fixups: 1) Fake MMC-5 version,
2585 * to indicate to the Linux scsi midlayer this is a modern
2586 * device. 2) Ensure response data format / ATAPI information
2587 * are always correct.
2588 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002589 if (buf[2] == 0) {
2590 buf[2] = 0x5;
2591 buf[3] = 0x32;
2592 }
2593
Tejun Heo87340e92008-04-28 17:48:51 +09002594 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002596
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597 cmd->result = SAM_STAT_GOOD;
2598 }
2599
2600 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002601 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602}
2603/**
2604 * atapi_xlat - Initialize PACKET taskfile
2605 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606 *
2607 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002608 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002609 *
2610 * RETURNS:
2611 * Zero on success, non-zero on failure.
2612 */
Tejun Heoad706992006-12-17 10:45:57 +09002613static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614{
Tejun Heo542b1442006-12-17 10:45:08 +09002615 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002617 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002618 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002619 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620
Tejun Heo2e5704f2006-12-17 10:46:33 +09002621 memset(qc->cdb, 0, dev->cdb_len);
2622 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623
2624 qc->complete_fn = atapi_qc_complete;
2625
2626 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002627 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628 qc->tf.flags |= ATA_TFLAG_WRITE;
2629 DPRINTK("direction: write\n");
2630 }
2631
2632 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002633 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002635 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002636 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002637 using_pio = 1;
2638
Tejun Heoe1902222007-11-26 20:58:02 +09002639 /* Some controller variants snoop this value for Packet
2640 * transfers to do state machine and FIFO management. Thus we
2641 * want to set it properly, and for DMA where it is
2642 * effectively meaningless.
2643 */
Tejun Heoaacda372008-03-18 17:47:43 +09002644 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002645
Tejun Heoe1902222007-11-26 20:58:02 +09002646 /* Most ATAPI devices which honor transfer chunk size don't
2647 * behave according to the spec when odd chunk size which
2648 * matches the transfer length is specified. If the number of
2649 * bytes to transfer is 2n+1. According to the spec, what
2650 * should happen is to indicate that 2n+1 is going to be
2651 * transferred and transfer 2n+2 bytes where the last byte is
2652 * padding.
2653 *
2654 * In practice, this doesn't happen. ATAPI devices first
2655 * indicate and transfer 2n bytes and then indicate and
2656 * transfer 2 bytes where the last byte is padding.
2657 *
2658 * This inconsistency confuses several controllers which
2659 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2660 * These controllers use actual number of transferred bytes to
2661 * update DMA poitner and transfer of 4n+2 bytes make those
2662 * controller push DMA pointer by 4n+4 bytes because SATA data
2663 * FISes are aligned to 4 bytes. This causes data corruption
2664 * and buffer overrun.
2665 *
2666 * Always setting nbytes to even number solves this problem
2667 * because then ATAPI devices don't have to split data at 2n
2668 * boundaries.
2669 */
2670 if (nbytes & 0x1)
2671 nbytes++;
2672
Alan Cox2db78dd2007-10-02 13:53:04 -07002673 qc->tf.lbam = (nbytes & 0xFF);
2674 qc->tf.lbah = (nbytes >> 8);
2675
Tejun Heo5895ef92008-06-17 12:36:26 +09002676 if (nodata)
2677 qc->tf.protocol = ATAPI_PROT_NODATA;
2678 else if (using_pio)
2679 qc->tf.protocol = ATAPI_PROT_PIO;
2680 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002681 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002682 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683 qc->tf.feature |= ATAPI_PKT_DMA;
2684
Tejun Heo91163002008-02-21 13:25:50 +09002685 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2686 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002687 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 }
2690
Alan Cox2db78dd2007-10-02 13:53:04 -07002691
2692 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2693 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 return 0;
2695}
2696
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002697static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002698{
Tejun Heo071f44b2008-04-07 22:47:22 +09002699 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002700 if (likely(devno < ata_link_max_devices(&ap->link)))
2701 return &ap->link.device[devno];
2702 } else {
2703 if (likely(devno < ap->nr_pmp_links))
2704 return &ap->pmp_link[devno].device[0];
2705 }
2706
Tejun Heoab5b3a52006-05-31 18:27:34 +09002707 return NULL;
2708}
2709
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002710static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2711 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002712{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002713 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002714
Tejun Heo41bda9c2007-08-06 18:36:24 +09002715 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002716 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002717 if (unlikely(scsidev->channel || scsidev->lun))
2718 return NULL;
2719 devno = scsidev->id;
2720 } else {
2721 if (unlikely(scsidev->id || scsidev->lun))
2722 return NULL;
2723 devno = scsidev->channel;
2724 }
2725
2726 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002727}
2728
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729/**
2730 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2731 * @ap: ATA port to which the device is attached
2732 * @scsidev: SCSI device from which we derive the ATA device
2733 *
2734 * Given various information provided in struct scsi_cmnd,
2735 * map that onto an ATA bus, and using that mapping
2736 * determine which ata_device is associated with the
2737 * SCSI command to be sent.
2738 *
2739 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002740 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741 *
2742 * RETURNS:
2743 * Associated ATA device, or %NULL if not found.
2744 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002746ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002747{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002748 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002749
Tejun Heo2486fa52008-07-31 07:52:40 +09002750 if (unlikely(!dev || !ata_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751 return NULL;
2752
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753 return dev;
2754}
2755
Jeff Garzikb0955182005-05-12 15:45:22 -04002756/*
2757 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2758 * @byte1: Byte 1 from pass-thru CDB.
2759 *
2760 * RETURNS:
2761 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2762 */
2763static u8
2764ata_scsi_map_proto(u8 byte1)
2765{
2766 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002767 case 3: /* Non-data */
2768 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002769
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002770 case 6: /* DMA */
2771 case 10: /* UDMA Data-in */
2772 case 11: /* UDMA Data-Out */
2773 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002774
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002775 case 4: /* PIO Data-in */
2776 case 5: /* PIO Data-out */
2777 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002778
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002779 case 0: /* Hard Reset */
2780 case 1: /* SRST */
2781 case 8: /* Device Diagnostic */
2782 case 9: /* Device Reset */
2783 case 7: /* DMA Queued */
2784 case 12: /* FPDMA */
2785 case 15: /* Return Response Info */
2786 default: /* Reserved */
2787 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002788 }
2789
2790 return ATA_PROT_UNKNOWN;
2791}
2792
2793/**
2794 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2795 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002796 *
2797 * Handles either 12 or 16-byte versions of the CDB.
2798 *
2799 * RETURNS:
2800 * Zero on success, non-zero on failure.
2801 */
Tejun Heoad706992006-12-17 10:45:57 +09002802static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002803{
2804 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002805 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002806 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002807 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002808
Tejun Heo542b1442006-12-17 10:45:08 +09002809 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002810 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002811
Alan Coxae8d4ee2007-11-04 22:05:49 -05002812 /*
Jeff Garzikb0955182005-05-12 15:45:22 -04002813 * 12 and 16 byte CDBs use different offsets to
2814 * provide the various register values.
2815 */
Tejun Heo542b1442006-12-17 10:45:08 +09002816 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002817 /*
2818 * 16-byte CDB - may contain extended commands.
2819 *
2820 * If that is the case, copy the upper byte register values.
2821 */
Tejun Heo542b1442006-12-17 10:45:08 +09002822 if (cdb[1] & 0x01) {
2823 tf->hob_feature = cdb[3];
2824 tf->hob_nsect = cdb[5];
2825 tf->hob_lbal = cdb[7];
2826 tf->hob_lbam = cdb[9];
2827 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002828 tf->flags |= ATA_TFLAG_LBA48;
2829 } else
2830 tf->flags &= ~ATA_TFLAG_LBA48;
2831
2832 /*
2833 * Always copy low byte, device and command registers.
2834 */
Tejun Heo542b1442006-12-17 10:45:08 +09002835 tf->feature = cdb[4];
2836 tf->nsect = cdb[6];
2837 tf->lbal = cdb[8];
2838 tf->lbam = cdb[10];
2839 tf->lbah = cdb[12];
2840 tf->device = cdb[13];
2841 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002842 } else {
2843 /*
2844 * 12-byte CDB - incapable of extended commands.
2845 */
2846 tf->flags &= ~ATA_TFLAG_LBA48;
2847
Tejun Heo542b1442006-12-17 10:45:08 +09002848 tf->feature = cdb[3];
2849 tf->nsect = cdb[4];
2850 tf->lbal = cdb[5];
2851 tf->lbam = cdb[6];
2852 tf->lbah = cdb[7];
2853 tf->device = cdb[8];
2854 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002855 }
Albert Leefa4453c2007-06-07 15:52:07 +08002856
2857 /* enforce correct master/slave bit */
2858 tf->device = dev->devno ?
2859 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002860
Tejun Heobd30add2009-09-03 16:08:11 +09002861 /* READ/WRITE LONG use a non-standard sect_size */
2862 qc->sect_size = ATA_SECT_SIZE;
2863 switch (tf->command) {
2864 case ATA_CMD_READ_LONG:
2865 case ATA_CMD_READ_LONG_ONCE:
2866 case ATA_CMD_WRITE_LONG:
2867 case ATA_CMD_WRITE_LONG_ONCE:
2868 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2869 goto invalid_fld;
2870 qc->sect_size = scsi_bufflen(scmd);
2871 }
2872
2873 /*
2874 * Set flags so that all registers will be written, pass on
2875 * write indication (used for PIO/DMA setup), result TF is
2876 * copied back and we don't whine too much about its failure.
2877 */
Douglas Gilbertbc496ed2010-02-01 13:11:38 -05002878 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heobd30add2009-09-03 16:08:11 +09002879 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2880 tf->flags |= ATA_TFLAG_WRITE;
2881
2882 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2883
2884 /*
2885 * Set transfer length.
2886 *
2887 * TODO: find out if we need to do more here to
2888 * cover scatter/gather case.
2889 */
2890 ata_qc_set_pc_nbytes(qc);
2891
2892 /* We may not issue DMA commands if no DMA mode is set */
2893 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2894 goto invalid_fld;
2895
Albert Lee1dce5892007-06-07 15:49:22 +08002896 /* sanity check for pio multi commands */
2897 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2898 goto invalid_fld;
2899
2900 if (is_multi_taskfile(tf)) {
2901 unsigned int multi_count = 1 << (cdb[1] >> 5);
2902
2903 /* compare the passed through multi_count
2904 * with the cached multi_count of libata
2905 */
2906 if (multi_count != dev->multi_count)
2907 ata_dev_printk(dev, KERN_WARNING,
2908 "invalid multi_count %u ignored\n",
2909 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002910 }
Albert Lee1dce5892007-06-07 15:49:22 +08002911
Jeff Garzikb0955182005-05-12 15:45:22 -04002912 /*
2913 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2914 * SET_FEATURES - XFER MODE must be preceded/succeeded
2915 * by an update to hardware-specific registers for each
2916 * controller (i.e. the reason for ->set_piomode(),
2917 * ->set_dmamode(), and ->post_set_mode() hooks).
2918 */
Tejun Heobd30add2009-09-03 16:08:11 +09002919 if (tf->command == ATA_CMD_SET_FEATURES &&
2920 tf->feature == SETFEATURES_XFER)
Tejun Heo9a405252005-12-02 11:49:11 +09002921 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002922
2923 /*
Tejun Heobd30add2009-09-03 16:08:11 +09002924 * Filter TPM commands by default. These provide an
2925 * essentially uncontrolled encrypted "back door" between
2926 * applications and the disk. Set libata.allow_tpm=1 if you
2927 * have a real reason for wanting to use them. This ensures
2928 * that installed software cannot easily mess stuff up without
2929 * user intent. DVR type users will probably ship with this enabled
2930 * for movie content management.
Jeff Garzikb0955182005-05-12 15:45:22 -04002931 *
Tejun Heobd30add2009-09-03 16:08:11 +09002932 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2933 * for this and should do in future but that it is not sufficient as
2934 * DCS is an optional feature set. Thus we also do the software filter
2935 * so that we comply with the TC consortium stated goal that the user
2936 * can turn off TC features of their system.
Jeff Garzikb0955182005-05-12 15:45:22 -04002937 */
Tejun Heobd30add2009-09-03 16:08:11 +09002938 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2939 goto invalid_fld;
Tejun Heoe61e0672006-05-15 20:57:40 +09002940
Jeff Garzikb0955182005-05-12 15:45:22 -04002941 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002942
2943 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002944 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002945 /* "Invalid field in cdb" */
2946 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002947}
2948
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002949static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
2950{
2951 struct ata_taskfile *tf = &qc->tf;
2952 struct scsi_cmnd *scmd = qc->scsicmd;
2953 struct ata_device *dev = qc->dev;
2954 const u8 *cdb = scmd->cmnd;
2955 u64 block;
2956 u32 n_block;
2957 u32 size;
2958 void *buf;
2959
2960 /* we may not issue DMA commands if no DMA mode is set */
2961 if (unlikely(!dev->dma_mode))
2962 goto invalid_fld;
2963
2964 if (unlikely(scmd->cmd_len < 16))
2965 goto invalid_fld;
2966 scsi_16_lba_len(cdb, &block, &n_block);
2967
2968 /* for now we only support WRITE SAME with the unmap bit set */
2969 if (unlikely(!(cdb[1] & 0x8)))
2970 goto invalid_fld;
2971
2972 /*
2973 * WRITE SAME always has a sector sized buffer as payload, this
2974 * should never be a multiple entry S/G list.
2975 */
2976 if (!scsi_sg_count(scmd))
2977 goto invalid_fld;
2978
2979 buf = page_address(sg_page(scsi_sglist(scmd)));
Martin K. Petersend0634c42009-11-26 12:00:43 -05002980 size = ata_set_lba_range_entries(buf, 512, block, n_block);
Christoph Hellwig18f0f972009-11-17 10:00:47 -05002981
2982 tf->protocol = ATA_PROT_DMA;
2983 tf->hob_feature = 0;
2984 tf->feature = ATA_DSM_TRIM;
2985 tf->hob_nsect = (size / 512) >> 8;
2986 tf->nsect = size / 512;
2987 tf->command = ATA_CMD_DSM;
2988 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
2989 ATA_TFLAG_WRITE;
2990
2991 ata_qc_set_pc_nbytes(qc);
2992
2993 return 0;
2994
2995 invalid_fld:
2996 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2997 /* "Invalid field in cdb" */
2998 return 1;
2999}
3000
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001/**
3002 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3003 * @dev: ATA device
3004 * @cmd: SCSI command opcode to consider
3005 *
3006 * Look up the SCSI command given, and determine whether the
3007 * SCSI command is to be translated or simulated.
3008 *
3009 * RETURNS:
3010 * Pointer to translation function if possible, %NULL if not.
3011 */
3012
3013static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3014{
3015 switch (cmd) {
3016 case READ_6:
3017 case READ_10:
3018 case READ_16:
3019
3020 case WRITE_6:
3021 case WRITE_10:
3022 case WRITE_16:
3023 return ata_scsi_rw_xlat;
3024
Christoph Hellwig0cdd6eb2009-12-10 10:36:01 +01003025 case WRITE_SAME_16:
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003026 return ata_scsi_write_same_xlat;
3027
Linus Torvalds1da177e2005-04-16 15:20:36 -07003028 case SYNCHRONIZE_CACHE:
3029 if (ata_try_flush_cache(dev))
3030 return ata_scsi_flush_xlat;
3031 break;
3032
3033 case VERIFY:
3034 case VERIFY_16:
3035 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04003036
3037 case ATA_12:
3038 case ATA_16:
3039 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04003040
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04003041 case START_STOP:
3042 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043 }
3044
3045 return NULL;
3046}
3047
3048/**
3049 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3050 * @ap: ATA port to which the command was being sent
3051 * @cmd: SCSI command to dump
3052 *
3053 * Prints the contents of a SCSI command via printk().
3054 */
3055
3056static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3057 struct scsi_cmnd *cmd)
3058{
3059#ifdef ATA_DEBUG
3060 struct scsi_device *scsidev = cmd->device;
3061 u8 *scsicmd = cmd->cmnd;
3062
3063 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09003064 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003065 scsidev->channel, scsidev->id, scsidev->lun,
3066 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3067 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3068 scsicmd[8]);
3069#endif
3070}
3071
Tejun Heo542b1442006-12-17 10:45:08 +09003072static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09003073 void (*done)(struct scsi_cmnd *),
3074 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06003075{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003076 u8 scsi_op = scmd->cmnd[0];
3077 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09003078 int rc = 0;
3079
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003080 if (dev->class == ATA_DEV_ATA) {
3081 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3082 goto bad_cdb_len;
3083
3084 xlat_func = ata_get_xlat_func(dev, scsi_op);
3085 } else {
3086 if (unlikely(!scmd->cmd_len))
3087 goto bad_cdb_len;
3088
3089 xlat_func = NULL;
3090 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3091 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09003092 int len = COMMAND_SIZE(scsi_op);
3093 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003094 goto bad_cdb_len;
3095
3096 xlat_func = atapi_xlat;
3097 } else {
3098 /* ATA_16 passthru, treat as an ATA command */
3099 if (unlikely(scmd->cmd_len > 16))
3100 goto bad_cdb_len;
3101
3102 xlat_func = ata_get_xlat_func(dev, scsi_op);
3103 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09003104 }
3105
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003106 if (xlat_func)
3107 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3108 else
3109 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09003110
3111 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003112
3113 bad_cdb_len:
3114 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3115 scmd->cmd_len, scsi_op, dev->cdb_len);
3116 scmd->result = DID_ERROR << 16;
3117 done(scmd);
3118 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06003119}
3120
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121/**
3122 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3123 * @cmd: SCSI command to be sent
3124 * @done: Completion function, called when command is complete
3125 *
3126 * In some cases, this function translates SCSI commands into
3127 * ATA taskfiles, and queues the taskfiles to be sent to
3128 * hardware. In other cases, this function simulates a
3129 * SCSI device by evaluating and responding to certain
3130 * SCSI commands. This creates the overall effect of
3131 * ATA and ATAPI devices appearing as SCSI devices.
3132 *
3133 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003134 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135 *
3136 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09003137 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3138 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003140int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3141{
3142 struct ata_port *ap;
3143 struct ata_device *dev;
3144 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05003145 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09003146 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003147
Jeff Garzik35bb94b2006-04-11 13:12:34 -04003148 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003149
3150 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003151 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003152
3153 ata_scsi_dump_cdb(ap, cmd);
3154
3155 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003156 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09003157 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003158 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159 cmd->result = (DID_BAD_TARGET << 16);
3160 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003161 }
3162
Jeff Garzikba6a1302006-06-22 23:46:10 -04003163 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003164 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09003165 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003166}
3167
3168/**
3169 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003170 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003171 * @cmd: SCSI command being sent to device.
3172 * @done: SCSI command completion function.
3173 *
3174 * Interprets and directly executes a select list of SCSI commands
3175 * that can be handled internally.
3176 *
3177 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003178 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003179 */
3180
Tejun Heo3373efd2006-05-15 20:57:53 +09003181void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182 void (*done)(struct scsi_cmnd *))
3183{
3184 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04003185 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04003186 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003187
Tejun Heo9a3dccc2006-01-06 09:56:18 +01003188 args.dev = dev;
3189 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003190 args.cmd = cmd;
3191 args.done = done;
3192
3193 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003194 /* TODO: worth improving? */
3195 case FORMAT_UNIT:
3196 ata_scsi_invalid_field(cmd, done);
3197 break;
3198
3199 case INQUIRY:
3200 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04003201 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003202 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3203 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3204 else switch (scsicmd[2]) {
3205 case 0x00:
3206 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003207 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003208 case 0x80:
3209 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003211 case 0x83:
3212 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003213 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003214 case 0x89:
3215 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216 break;
Christoph Hellwig18f0f972009-11-17 10:00:47 -05003217 case 0xb0:
3218 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3219 break;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06003220 case 0xb1:
3221 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3222 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003224 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003225 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003226 }
3227 break;
3228
3229 case MODE_SENSE:
3230 case MODE_SENSE_10:
3231 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3232 break;
3233
3234 case MODE_SELECT: /* unconditionally return */
3235 case MODE_SELECT_10: /* bad-field-in-cdb */
3236 ata_scsi_invalid_field(cmd, done);
3237 break;
3238
3239 case READ_CAPACITY:
3240 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3241 break;
3242
3243 case SERVICE_ACTION_IN:
3244 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3245 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3246 else
3247 ata_scsi_invalid_field(cmd, done);
3248 break;
3249
3250 case REPORT_LUNS:
3251 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3252 break;
3253
3254 case REQUEST_SENSE:
3255 ata_scsi_set_sense(cmd, 0, 0, 0);
3256 cmd->result = (DRIVER_SENSE << 24);
3257 done(cmd);
3258 break;
3259
3260 /* if we reach this, then writeback caching is disabled,
3261 * turning this into a no-op.
3262 */
3263 case SYNCHRONIZE_CACHE:
3264 /* fall through */
3265
3266 /* no-op's, complete with success */
3267 case REZERO_UNIT:
3268 case SEEK_6:
3269 case SEEK_10:
3270 case TEST_UNIT_READY:
3271 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3272 break;
3273
3274 case SEND_DIAGNOSTIC:
3275 tmp8 = scsicmd[1] & ~(1 << 3);
3276 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3277 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3278 else
3279 ata_scsi_invalid_field(cmd, done);
3280 break;
3281
3282 /* all other commands */
3283 default:
3284 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3285 /* "Invalid command operation code" */
3286 done(cmd);
3287 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288 }
3289}
3290
Tejun Heof3187192007-04-17 23:44:07 +09003291int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3292{
3293 int i, rc;
3294
3295 for (i = 0; i < host->n_ports; i++) {
3296 struct ata_port *ap = host->ports[i];
3297 struct Scsi_Host *shost;
3298
3299 rc = -ENOMEM;
3300 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3301 if (!shost)
3302 goto err_alloc;
3303
3304 *(struct ata_port **)&shost->hostdata[0] = ap;
3305 ap->scsi_host = shost;
3306
3307 shost->transportt = &ata_scsi_transport_template;
3308 shost->unique_id = ap->print_id;
3309 shost->max_id = 16;
3310 shost->max_lun = 1;
3311 shost->max_channel = 1;
3312 shost->max_cmd_len = 16;
3313
Tejun Heo31cc23b2007-09-23 13:14:12 +09003314 /* Schedule policy is determined by ->qc_defer()
3315 * callback and it needs to see every deferred qc.
3316 * Set host_blocked to 1 to prevent SCSI midlayer from
3317 * automatically deferring requests.
3318 */
3319 shost->max_host_blocked = 1;
3320
Tejun Heof3187192007-04-17 23:44:07 +09003321 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3322 if (rc)
3323 goto err_add;
3324 }
3325
3326 return 0;
3327
3328 err_add:
3329 scsi_host_put(host->ports[i]->scsi_host);
3330 err_alloc:
3331 while (--i >= 0) {
3332 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3333
3334 scsi_remove_host(shost);
3335 scsi_host_put(shost);
3336 }
3337 return rc;
3338}
3339
Tejun Heo1ae46312007-07-16 14:29:40 +09003340void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003341{
Tejun Heo1ae46312007-07-16 14:29:40 +09003342 int tries = 5;
3343 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003344 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003345 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003346
Tejun Heo198e0fe2006-04-02 18:51:52 +09003347 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003348 return;
3349
Tejun Heo1ae46312007-07-16 14:29:40 +09003350 repeat:
Tejun Heo1eca4362008-11-03 20:03:17 +09003351 ata_for_each_link(link, ap, EDGE) {
3352 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003353 struct scsi_device *sdev;
3354 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003355
Tejun Heo1eca4362008-11-03 20:03:17 +09003356 if (dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003357 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003358
Tejun Heo41bda9c2007-08-06 18:36:24 +09003359 if (ata_is_host_link(link))
3360 id = dev->devno;
3361 else
3362 channel = link->pmp;
3363
3364 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3365 NULL);
3366 if (!IS_ERR(sdev)) {
3367 dev->sdev = sdev;
3368 scsi_device_put(sdev);
3369 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003370 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003371 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003372
3373 /* If we scanned while EH was in progress or allocation
3374 * failure occurred, scan would have failed silently. Check
3375 * whether all devices are attached.
3376 */
Tejun Heo1eca4362008-11-03 20:03:17 +09003377 ata_for_each_link(link, ap, EDGE) {
3378 ata_for_each_dev(dev, link, ENABLED) {
3379 if (!dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003380 goto exit_loop;
3381 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003382 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003383 exit_loop:
3384 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003385 return;
3386
3387 /* we're missing some SCSI devices */
3388 if (sync) {
3389 /* If caller requested synchrnous scan && we've made
3390 * any progress, sleep briefly and repeat.
3391 */
3392 if (dev != last_failed_dev) {
3393 msleep(100);
3394 last_failed_dev = dev;
3395 goto repeat;
3396 }
3397
3398 /* We might be failing to detect boot device, give it
3399 * a few more chances.
3400 */
3401 if (--tries) {
3402 msleep(100);
3403 goto repeat;
3404 }
3405
3406 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3407 "failed without making any progress,\n"
3408 " switching to async\n");
3409 }
3410
3411 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3412 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003413}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003414
3415/**
3416 * ata_scsi_offline_dev - offline attached SCSI device
3417 * @dev: ATA device to offline attached SCSI device for
3418 *
3419 * This function is called from ata_eh_hotplug() and responsible
3420 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003421 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003422 * against clearing.
3423 *
3424 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003425 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003426 *
3427 * RETURNS:
3428 * 1 if attached SCSI device exists, 0 otherwise.
3429 */
3430int ata_scsi_offline_dev(struct ata_device *dev)
3431{
3432 if (dev->sdev) {
3433 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3434 return 1;
3435 }
3436 return 0;
3437}
Tejun Heo580b2102006-05-31 18:28:05 +09003438
3439/**
3440 * ata_scsi_remove_dev - remove attached SCSI device
3441 * @dev: ATA device to remove attached SCSI device for
3442 *
3443 * This function is called from ata_eh_scsi_hotplug() and
3444 * responsible for removing the SCSI device attached to @dev.
3445 *
3446 * LOCKING:
3447 * Kernel thread context (may sleep).
3448 */
3449static void ata_scsi_remove_dev(struct ata_device *dev)
3450{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003451 struct ata_port *ap = dev->link->ap;
Tejun Heo580b2102006-05-31 18:28:05 +09003452 struct scsi_device *sdev;
3453 unsigned long flags;
3454
3455 /* Alas, we need to grab scan_mutex to ensure SCSI device
3456 * state doesn't change underneath us and thus
3457 * scsi_device_get() always succeeds. The mutex locking can
3458 * be removed if there is __scsi_device_get() interface which
3459 * increments reference counts regardless of device state.
3460 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003461 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003462 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003463
Jeff Garzikcca39742006-08-24 03:19:22 -04003464 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b2102006-05-31 18:28:05 +09003465 sdev = dev->sdev;
3466 dev->sdev = NULL;
3467
3468 if (sdev) {
3469 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003470 * away underneath us after the host lock and
Tejun Heo580b2102006-05-31 18:28:05 +09003471 * scan_mutex are released. Hold onto it.
3472 */
3473 if (scsi_device_get(sdev) == 0) {
3474 /* The following ensures the attached sdev is
3475 * offline on return from ata_scsi_offline_dev()
3476 * regardless it wins or loses the race
3477 * against this function.
3478 */
3479 scsi_device_set_state(sdev, SDEV_OFFLINE);
3480 } else {
3481 WARN_ON(1);
3482 sdev = NULL;
3483 }
3484 }
3485
Jeff Garzikba6a1302006-06-22 23:46:10 -04003486 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003487 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003488
3489 if (sdev) {
3490 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
Kay Sieversb9d5fc42009-01-06 10:44:43 -08003491 dev_name(&sdev->sdev_gendev));
Tejun Heo580b2102006-05-31 18:28:05 +09003492
3493 scsi_remove_device(sdev);
3494 scsi_device_put(sdev);
3495 }
3496}
3497
Tejun Heo41bda9c2007-08-06 18:36:24 +09003498static void ata_scsi_handle_link_detach(struct ata_link *link)
3499{
3500 struct ata_port *ap = link->ap;
3501 struct ata_device *dev;
3502
Tejun Heo1eca4362008-11-03 20:03:17 +09003503 ata_for_each_dev(dev, link, ALL) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003504 unsigned long flags;
3505
3506 if (!(dev->flags & ATA_DFLAG_DETACHED))
3507 continue;
3508
3509 spin_lock_irqsave(ap->lock, flags);
3510 dev->flags &= ~ATA_DFLAG_DETACHED;
3511 spin_unlock_irqrestore(ap->lock, flags);
3512
3513 ata_scsi_remove_dev(dev);
3514 }
3515}
3516
Tejun Heo580b2102006-05-31 18:28:05 +09003517/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003518 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003519 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003520 *
3521 * Tell the block layer to send a media change notification
3522 * event.
3523 *
3524 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003525 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003526 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003527void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003528{
Tejun Heo854c73a2007-09-23 13:14:11 +09003529 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003530 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3531 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003532}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003533
3534/**
Tejun Heo580b2102006-05-31 18:28:05 +09003535 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003536 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b2102006-05-31 18:28:05 +09003537 *
3538 * Perform SCSI part of hotplug. It's executed from a separate
3539 * workqueue after EH completes. This is necessary because SCSI
3540 * hot plugging requires working EH and hot unplugging is
3541 * synchronized with hot plugging with a mutex.
3542 *
3543 * LOCKING:
3544 * Kernel thread context (may sleep).
3545 */
David Howells65f27f32006-11-22 14:55:48 +00003546void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b2102006-05-31 18:28:05 +09003547{
David Howells65f27f32006-11-22 14:55:48 +00003548 struct ata_port *ap =
3549 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003550 int i;
Tejun Heo580b2102006-05-31 18:28:05 +09003551
Tejun Heob51e9e52006-06-29 01:29:30 +09003552 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b2102006-05-31 18:28:05 +09003553 DPRINTK("ENTER/EXIT - unloading\n");
3554 return;
3555 }
3556
3557 DPRINTK("ENTER\n");
3558
Tejun Heo41bda9c2007-08-06 18:36:24 +09003559 /* Unplug detached devices. We cannot use link iterator here
3560 * because PMP links have to be scanned even if PMP is
3561 * currently not attached. Iterate manually.
3562 */
3563 ata_scsi_handle_link_detach(&ap->link);
3564 if (ap->pmp_link)
3565 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3566 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b2102006-05-31 18:28:05 +09003567
3568 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003569 ata_scsi_scan_host(ap, 0);
Tejun Heo580b2102006-05-31 18:28:05 +09003570
3571 DPRINTK("EXIT\n");
3572}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003573
3574/**
3575 * ata_scsi_user_scan - indication for user-initiated bus scan
3576 * @shost: SCSI host to scan
3577 * @channel: Channel to scan
3578 * @id: ID to scan
3579 * @lun: LUN to scan
3580 *
3581 * This function is called when user explicitly requests bus
3582 * scan. Set probe pending flag and invoke EH.
3583 *
3584 * LOCKING:
3585 * SCSI layer (we don't care)
3586 *
3587 * RETURNS:
3588 * Zero.
3589 */
3590static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3591 unsigned int id, unsigned int lun)
3592{
3593 struct ata_port *ap = ata_shost_to_port(shost);
3594 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003595 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003596
3597 if (!ap->ops->error_handler)
3598 return -EOPNOTSUPP;
3599
Tejun Heo41bda9c2007-08-06 18:36:24 +09003600 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003601 return -EINVAL;
3602
Tejun Heo071f44b2008-04-07 22:47:22 +09003603 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003604 if (channel != SCAN_WILD_CARD && channel)
3605 return -EINVAL;
3606 devno = id;
3607 } else {
3608 if (id != SCAN_WILD_CARD && id)
3609 return -EINVAL;
3610 devno = channel;
3611 }
3612
Jeff Garzikba6a1302006-06-22 23:46:10 -04003613 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003614
Tejun Heo41bda9c2007-08-06 18:36:24 +09003615 if (devno == SCAN_WILD_CARD) {
3616 struct ata_link *link;
3617
Tejun Heo1eca4362008-11-03 20:03:17 +09003618 ata_for_each_link(link, ap, EDGE) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003619 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003620 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003621 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003622 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003623 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003624 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003625
3626 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003627 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003628 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003629 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003630 } else
3631 rc = -EINVAL;
3632 }
3633
Tejun Heo309afcb2006-09-30 18:07:17 +09003634 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003635 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003636 spin_unlock_irqrestore(ap->lock, flags);
3637 ata_port_wait_eh(ap);
3638 } else
3639 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003640
3641 return rc;
3642}
zhao, forrest3057ac32006-06-12 12:01:34 +08003643
3644/**
Tejun Heod0171262006-06-12 22:51:14 +09003645 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003646 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003647 *
Tejun Heod0171262006-06-12 22:51:14 +09003648 * After ATA pass thru (SAT) commands are executed successfully,
3649 * libata need to propagate the changes to SCSI layer. This
3650 * function must be executed from ata_aux_wq such that sdev
3651 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003652 *
Tejun Heod0171262006-06-12 22:51:14 +09003653 * LOCKING:
3654 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003655 */
David Howells65f27f32006-11-22 14:55:48 +00003656void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003657{
David Howells65f27f32006-11-22 14:55:48 +00003658 struct ata_port *ap =
3659 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003660 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003661 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003662 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003663
Tejun Heof84e7e42006-11-22 11:21:31 +09003664 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003665
Tejun Heo1eca4362008-11-03 20:03:17 +09003666 ata_for_each_link(link, ap, EDGE) {
3667 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003668 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003669
Tejun Heo1eca4362008-11-03 20:03:17 +09003670 if (!sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003671 continue;
3672 if (scsi_device_get(sdev))
3673 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003674
Tejun Heo41bda9c2007-08-06 18:36:24 +09003675 spin_unlock_irqrestore(ap->lock, flags);
3676 scsi_rescan_device(&(sdev->sdev_gendev));
3677 scsi_device_put(sdev);
3678 spin_lock_irqsave(ap->lock, flags);
3679 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003680 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003681
3682 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003683}
Brian King80289162006-08-07 14:27:31 -05003684
3685/**
3686 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003687 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003688 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003689 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003690 *
3691 * LOCKING:
3692 * PCI/etc. bus probe sem.
3693 *
3694 * RETURNS:
3695 * ata_port pointer on success / NULL on failure.
3696 */
3697
Jeff Garzikcca39742006-08-24 03:19:22 -04003698struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003699 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003700 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003701{
Tejun Heof3187192007-04-17 23:44:07 +09003702 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003703
Tejun Heof3187192007-04-17 23:44:07 +09003704 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003705 if (!ap)
3706 return NULL;
3707
Tejun Heof3187192007-04-17 23:44:07 +09003708 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003709 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003710 ap->pio_mask = port_info->pio_mask;
3711 ap->mwdma_mask = port_info->mwdma_mask;
3712 ap->udma_mask = port_info->udma_mask;
3713 ap->flags |= port_info->flags;
3714 ap->ops = port_info->port_ops;
3715 ap->cbl = ATA_CBL_SATA;
3716
Brian King80289162006-08-07 14:27:31 -05003717 return ap;
3718}
3719EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3720
3721/**
3722 * ata_sas_port_start - Set port up for dma.
3723 * @ap: Port to initialize
3724 *
3725 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003726 * initialized.
Brian King80289162006-08-07 14:27:31 -05003727 *
3728 * May be used as the port_start() entry in ata_port_operations.
3729 *
3730 * LOCKING:
3731 * Inherited from caller.
3732 */
3733int ata_sas_port_start(struct ata_port *ap)
3734{
James Bottomleydde20202008-02-19 11:36:56 +01003735 return 0;
Brian King80289162006-08-07 14:27:31 -05003736}
3737EXPORT_SYMBOL_GPL(ata_sas_port_start);
3738
3739/**
3740 * ata_port_stop - Undo ata_sas_port_start()
3741 * @ap: Port to shut down
3742 *
Brian King80289162006-08-07 14:27:31 -05003743 * May be used as the port_stop() entry in ata_port_operations.
3744 *
3745 * LOCKING:
3746 * Inherited from caller.
3747 */
3748
3749void ata_sas_port_stop(struct ata_port *ap)
3750{
Brian King80289162006-08-07 14:27:31 -05003751}
3752EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3753
3754/**
3755 * ata_sas_port_init - Initialize a SATA device
3756 * @ap: SATA port to initialize
3757 *
3758 * LOCKING:
3759 * PCI/etc. bus probe sem.
3760 *
3761 * RETURNS:
3762 * Zero on success, non-zero on error.
3763 */
3764
3765int ata_sas_port_init(struct ata_port *ap)
3766{
3767 int rc = ap->ops->port_start(ap);
3768
Tejun Heof3187192007-04-17 23:44:07 +09003769 if (!rc) {
3770 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003771 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003772 }
Brian King80289162006-08-07 14:27:31 -05003773
3774 return rc;
3775}
3776EXPORT_SYMBOL_GPL(ata_sas_port_init);
3777
3778/**
3779 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3780 * @ap: SATA port to destroy
3781 *
3782 */
3783
3784void ata_sas_port_destroy(struct ata_port *ap)
3785{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003786 if (ap->ops->port_stop)
3787 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003788 kfree(ap);
3789}
3790EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3791
3792/**
3793 * ata_sas_slave_configure - Default slave_config routine for libata devices
3794 * @sdev: SCSI device to configure
3795 * @ap: ATA port to which SCSI device is attached
3796 *
3797 * RETURNS:
3798 * Zero.
3799 */
3800
3801int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3802{
3803 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003804 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003805 return 0;
3806}
3807EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3808
3809/**
3810 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3811 * @cmd: SCSI command to be sent
3812 * @done: Completion function, called when command is complete
3813 * @ap: ATA port to which the command is being sent
3814 *
3815 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003816 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3817 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003818 */
3819
3820int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3821 struct ata_port *ap)
3822{
Brian King08475a12006-11-20 13:51:56 -06003823 int rc = 0;
3824
Brian King80289162006-08-07 14:27:31 -05003825 ata_scsi_dump_cdb(ap, cmd);
3826
Tejun Heo2486fa52008-07-31 07:52:40 +09003827 if (likely(ata_dev_enabled(ap->link.device)))
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003828 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003829 else {
3830 cmd->result = (DID_BAD_TARGET << 16);
3831 done(cmd);
3832 }
Brian King08475a12006-11-20 13:51:56 -06003833 return rc;
Brian King80289162006-08-07 14:27:31 -05003834}
3835EXPORT_SYMBOL_GPL(ata_sas_queuecmd);