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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#include "libata.h"
52
Tejun Heo87340e92008-04-28 17:48:51 +090053#define SECTOR_SIZE 512
54#define ATA_SCSI_RBUF_SIZE 4096
55
56static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
57static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
Jeff Garzikb0955182005-05-12 15:45:22 -040058
Tejun Heoad706992006-12-17 10:45:57 +090059typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090060
Jeff Garzik2dcb4072007-10-19 06:42:56 -040061static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090062 const struct scsi_device *scsidev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -040063static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090064 const struct scsi_device *scsidev);
Tejun Heo83c47bc2006-05-31 18:28:07 +090065static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
66 unsigned int id, unsigned int lun);
Tejun Heoab5b3a52006-05-31 18:27:34 +090067
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040069#define RW_RECOVERY_MPAGE 0x1
70#define RW_RECOVERY_MPAGE_LEN 12
71#define CACHE_MPAGE 0x8
72#define CACHE_MPAGE_LEN 20
73#define CONTROL_MPAGE 0xa
74#define CONTROL_MPAGE_LEN 12
75#define ALL_MPAGES 0x3f
76#define ALL_SUB_MPAGES 0xff
77
78
Jeff Garzik24f75682007-09-21 07:54:49 -040079static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040080 RW_RECOVERY_MPAGE,
81 RW_RECOVERY_MPAGE_LEN - 2,
Jeff Garzik24f75682007-09-21 07:54:49 -040082 (1 << 7), /* AWRE */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040083 0, /* read retry count */
84 0, 0, 0, 0,
85 0, /* write retry count */
86 0, 0, 0
87};
88
89static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
90 CACHE_MPAGE,
91 CACHE_MPAGE_LEN - 2,
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0
96};
97
98static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE,
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
105};
106
Tejun Heo30afc842006-03-18 18:40:14 +0900107/*
108 * libata transport template. libata doesn't do real transport stuff.
109 * It just needs the eh_timed_out hook.
110 */
Tejun Heof3187192007-04-17 23:44:07 +0900111static struct scsi_transport_template ata_scsi_transport_template = {
Christoph Hellwig9227c332006-04-01 19:21:04 +0200112 .eh_strategy_handler = ata_scsi_error,
Tejun Heo30afc842006-03-18 18:40:14 +0900113 .eh_timed_out = ata_scsi_timed_out,
Tejun Heoccf68c32006-05-31 18:28:09 +0900114 .user_scan = ata_scsi_user_scan,
Tejun Heo30afc842006-03-18 18:40:14 +0900115};
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400118static const struct {
119 enum link_pm value;
120 const char *name;
121} link_pm_policy[] = {
122 { NOT_AVAILABLE, "max_performance" },
123 { MIN_POWER, "min_power" },
124 { MAX_PERFORMANCE, "max_performance" },
125 { MEDIUM_POWER, "medium_power" },
126};
127
Adrian Bunka2d6ed12007-10-31 00:50:23 +0100128static const char *ata_scsi_lpm_get(enum link_pm policy)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400129{
130 int i;
131
132 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
133 if (link_pm_policy[i].value == policy)
134 return link_pm_policy[i].name;
135
136 return NULL;
137}
138
Tony Jonesee959b02008-02-22 00:13:36 +0100139static ssize_t ata_scsi_lpm_put(struct device *dev,
140 struct device_attribute *attr,
141 const char *buf, size_t count)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400142{
Tony Jonesee959b02008-02-22 00:13:36 +0100143 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400144 struct ata_port *ap = ata_shost_to_port(shost);
145 enum link_pm policy = 0;
146 int i;
147
148 /*
149 * we are skipping array location 0 on purpose - this
150 * is because a value of NOT_AVAILABLE is displayed
151 * to the user as max_performance, but when the user
152 * writes "max_performance", they actually want the
153 * value to match MAX_PERFORMANCE.
154 */
155 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
156 const int len = strlen(link_pm_policy[i].name);
157 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
158 buf[len] == '\n') {
159 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 */
1100 blk_queue_max_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 {
Jens Axboe8bff7c62008-09-24 13:05:10 +02001122 if (ata_id_is_ssd(dev->id))
1123 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1124 sdev->request_queue);
1125
James Bottomleyd0ad3bc2008-01-22 13:43:48 -06001126 /* ATA devices must be sector aligned */
1127 blk_queue_update_dma_alignment(sdev->request_queue,
1128 ATA_SECT_SIZE - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +09001129 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +01001130 }
Tejun Heod8cf5382008-01-15 08:46:59 +09001131
Jeff Garzikf26792d2007-10-29 17:18:39 -04001132 if (dev->flags & ATA_DFLAG_AN)
1133 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1134
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001135 if (dev->flags & ATA_DFLAG_NCQ) {
1136 int depth;
1137
1138 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1139 depth = min(ATA_MAX_QUEUE - 1, depth);
Tejun Heo8a8bc222008-11-10 14:48:21 +09001140 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001141 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001142
1143 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -06001144}
1145
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146/**
1147 * ata_scsi_slave_config - Set SCSI device attributes
1148 * @sdev: SCSI device to examine
1149 *
1150 * This is called before we actually start reading
1151 * and writing to the device, to configure certain
1152 * SCSI mid-layer behaviors.
1153 *
1154 * LOCKING:
1155 * Defined by SCSI layer. We don't really care.
1156 */
1157
1158int ata_scsi_slave_config(struct scsi_device *sdev)
1159{
Tejun Heo31534362006-05-31 18:27:36 +09001160 struct ata_port *ap = ata_shost_to_port(sdev->host);
1161 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001162 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +09001163
Brian Kinga6cce2a2006-03-17 17:04:15 -06001164 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
Tejun Heo31534362006-05-31 18:27:36 +09001166 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001167 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001169 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170}
1171
1172/**
Tejun Heo83c47bc2006-05-31 18:28:07 +09001173 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1174 * @sdev: SCSI device to be destroyed
1175 *
1176 * @sdev is about to be destroyed for hot/warm unplugging. If
1177 * this unplugging was initiated by libata as indicated by NULL
1178 * dev->sdev, this function doesn't have to do anything.
1179 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1180 * Clear dev->sdev, schedule the device for ATA detach and invoke
1181 * EH.
1182 *
1183 * LOCKING:
1184 * Defined by SCSI layer. We don't really care.
1185 */
1186void ata_scsi_slave_destroy(struct scsi_device *sdev)
1187{
1188 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001189 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001190 unsigned long flags;
1191 struct ata_device *dev;
1192
1193 if (!ap->ops->error_handler)
1194 return;
1195
Jeff Garzikba6a1302006-06-22 23:46:10 -04001196 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09001197 dev = __ata_scsi_find_dev(ap, sdev);
1198 if (dev && dev->sdev) {
1199 /* SCSI device already in CANCEL state, no need to offline it */
1200 dev->sdev = NULL;
1201 dev->flags |= ATA_DFLAG_DETACH;
1202 ata_port_schedule_eh(ap);
1203 }
Jeff Garzikba6a1302006-06-22 23:46:10 -04001204 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001205
1206 kfree(q->dma_drain_buffer);
1207 q->dma_drain_buffer = NULL;
1208 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001209}
1210
1211/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001212 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1213 * @sdev: SCSI device to configure queue depth for
1214 * @queue_depth: new queue depth
1215 *
1216 * This is libata standard hostt->change_queue_depth callback.
1217 * SCSI will call into this callback when user tries to set queue
1218 * depth via sysfs.
1219 *
1220 * LOCKING:
1221 * SCSI layer (we don't care)
1222 *
1223 * RETURNS:
1224 * Newly configured queue depth.
1225 */
1226int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1227{
1228 struct ata_port *ap = ata_shost_to_port(sdev->host);
1229 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001230 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001231
Tejun Heoc3c70c42007-02-20 23:31:22 +09001232 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001233 return sdev->queue_depth;
1234
1235 dev = ata_scsi_find_dev(ap, sdev);
1236 if (!dev || !ata_dev_enabled(dev))
1237 return sdev->queue_depth;
1238
Tejun Heoc3c70c42007-02-20 23:31:22 +09001239 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001240 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001241 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1242 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001243 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001244 queue_depth = 1;
1245 }
Tejun Heo360f6542006-09-30 19:45:00 +09001246 spin_unlock_irqrestore(ap->lock, flags);
1247
Tejun Heoc3c70c42007-02-20 23:31:22 +09001248 /* limit and apply queue depth */
1249 queue_depth = min(queue_depth, sdev->host->can_queue);
1250 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1251 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1252
1253 if (sdev->queue_depth == queue_depth)
1254 return -EINVAL;
1255
1256 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001257 return queue_depth;
1258}
1259
Tejun Heod9aca222007-05-17 16:43:26 +02001260/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001261static void ata_delayed_done_timerfn(unsigned long arg)
1262{
1263 struct scsi_cmnd *scmd = (void *)arg;
1264
1265 scmd->scsi_done(scmd);
1266}
1267
Tejun Heod9aca222007-05-17 16:43:26 +02001268/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001269static void ata_delayed_done(struct scsi_cmnd *scmd)
1270{
1271 static struct timer_list timer;
1272
1273 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1274 mod_timer(&timer, jiffies + 5 * HZ);
1275}
1276
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001277/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001278 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1279 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001280 *
1281 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1282 * (to start). Perhaps these commands should be preceded by
1283 * CHECK POWER MODE to see what power mode the device is already in.
1284 * [See SAT revision 5 at www.t10.org]
1285 *
1286 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001287 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001288 *
1289 * RETURNS:
1290 * Zero on success, non-zero on error.
1291 */
Tejun Heoad706992006-12-17 10:45:57 +09001292static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001293{
Tejun Heo542b1442006-12-17 10:45:08 +09001294 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001295 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001296 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001297
Tejun Heo2e5704f2006-12-17 10:46:33 +09001298 if (scmd->cmd_len < 5)
1299 goto invalid_fld;
1300
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001301 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1302 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001303 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001304 ; /* ignore IMMED bit, violates sat-r05 */
1305 }
Tejun Heo542b1442006-12-17 10:45:08 +09001306 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001307 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001308 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001309 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001310
Tejun Heo542b1442006-12-17 10:45:08 +09001311 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001312 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001313
1314 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001315 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001316
1317 tf->lbah = 0x0;
1318 tf->lbam = 0x0;
1319 tf->lbal = 0x0;
1320 tf->device |= ATA_LBA;
1321 } else {
1322 /* CHS */
1323 tf->lbal = 0x1; /* sect */
1324 tf->lbam = 0x0; /* cyl low */
1325 tf->lbah = 0x0; /* cyl high */
1326 }
1327
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001328 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001329 } else {
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001330 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1331 * or S5) causing some drives to spin up and down again.
1332 */
1333 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1334 system_state == SYSTEM_POWER_OFF)
1335 goto skip;
1336
1337 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1338 system_entering_hibernation())
1339 goto skip;
1340
Tejun Heo920a4b12007-05-04 21:28:48 +02001341 /* XXX: This is for backward compatibility, will be
1342 * removed. Read Documentation/feature-removal-schedule.txt
1343 * for more info.
1344 */
Tejun Heod9aca222007-05-17 16:43:26 +02001345 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
Tejun Heo920a4b12007-05-04 21:28:48 +02001346 (system_state == SYSTEM_HALT ||
1347 system_state == SYSTEM_POWER_OFF)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001348 static unsigned long warned;
Tejun Heo920a4b12007-05-04 21:28:48 +02001349
Tejun Heoda071b42007-05-14 17:26:18 +02001350 if (!test_and_set_bit(0, &warned)) {
Tejun Heo920a4b12007-05-04 21:28:48 +02001351 ata_dev_printk(qc->dev, KERN_WARNING,
1352 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1353 "UPDATE SHUTDOWN UTILITY\n");
1354 ata_dev_printk(qc->dev, KERN_WARNING,
1355 "For more info, visit "
1356 "http://linux-ata.org/shutdown.html\n");
Tejun Heoda071b42007-05-14 17:26:18 +02001357
1358 /* ->scsi_done is not used, use it for
1359 * delayed completion.
1360 */
1361 scmd->scsi_done = qc->scsidone;
1362 qc->scsidone = ata_delayed_done;
Tejun Heo920a4b12007-05-04 21:28:48 +02001363 }
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001364 goto skip;
Tejun Heo920a4b12007-05-04 21:28:48 +02001365 }
1366
Robert Hancock78981a72007-01-30 00:59:18 -08001367 /* Issue ATA STANDBY IMMEDIATE command */
1368 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001369 }
Robert Hancock78981a72007-01-30 00:59:18 -08001370
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001371 /*
1372 * Standby and Idle condition timers could be implemented but that
1373 * would require libata to implement the Power condition mode page
1374 * and allow the user to change it. Changing mode pages requires
1375 * MODE SELECT to be implemented.
1376 */
1377
1378 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001379
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001380 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001381 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001382 /* "Invalid field in cbd" */
1383 return 1;
Rafael J. Wysocki2a6e58d2009-01-19 20:56:43 +01001384 skip:
1385 scmd->result = SAM_STAT_GOOD;
1386 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001387}
1388
1389
1390/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1392 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 *
1394 * Sets up an ATA taskfile to issue FLUSH CACHE or
1395 * FLUSH CACHE EXT.
1396 *
1397 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001398 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 *
1400 * RETURNS:
1401 * Zero on success, non-zero on error.
1402 */
Tejun Heoad706992006-12-17 10:45:57 +09001403static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404{
1405 struct ata_taskfile *tf = &qc->tf;
1406
1407 tf->flags |= ATA_TFLAG_DEVICE;
1408 tf->protocol = ATA_PROT_NODATA;
1409
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001410 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 tf->command = ATA_CMD_FLUSH_EXT;
1412 else
1413 tf->command = ATA_CMD_FLUSH;
1414
Tejun Heob666da32007-10-26 15:53:59 +09001415 /* flush is critical for IO integrity, consider it an IO command */
1416 qc->flags |= ATA_QCFLAG_IO;
1417
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 return 0;
1419}
1420
1421/**
Albert Lee3aef5232005-10-04 08:47:43 -04001422 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001423 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001424 *
1425 * Calculate LBA and transfer length for 6-byte commands.
1426 *
1427 * RETURNS:
1428 * @plba: the LBA
1429 * @plen: the transfer length
1430 */
Tejun Heo542b1442006-12-17 10:45:08 +09001431static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001432{
1433 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001434 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001435
1436 VPRINTK("six-byte command\n");
1437
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001438 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001439 lba |= ((u64)cdb[2]) << 8;
1440 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001441
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001442 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001443
1444 *plba = lba;
1445 *plen = len;
1446}
1447
1448/**
1449 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001450 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001451 *
1452 * Calculate LBA and transfer length for 10-byte commands.
1453 *
1454 * RETURNS:
1455 * @plba: the LBA
1456 * @plen: the transfer length
1457 */
Tejun Heo542b1442006-12-17 10:45:08 +09001458static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001459{
1460 u64 lba = 0;
1461 u32 len = 0;
1462
1463 VPRINTK("ten-byte command\n");
1464
Tejun Heo542b1442006-12-17 10:45:08 +09001465 lba |= ((u64)cdb[2]) << 24;
1466 lba |= ((u64)cdb[3]) << 16;
1467 lba |= ((u64)cdb[4]) << 8;
1468 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001469
Tejun Heo542b1442006-12-17 10:45:08 +09001470 len |= ((u32)cdb[7]) << 8;
1471 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001472
1473 *plba = lba;
1474 *plen = len;
1475}
1476
1477/**
1478 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001479 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001480 *
1481 * Calculate LBA and transfer length for 16-byte commands.
1482 *
1483 * RETURNS:
1484 * @plba: the LBA
1485 * @plen: the transfer length
1486 */
Tejun Heo542b1442006-12-17 10:45:08 +09001487static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001488{
1489 u64 lba = 0;
1490 u32 len = 0;
1491
1492 VPRINTK("sixteen-byte command\n");
1493
Tejun Heo542b1442006-12-17 10:45:08 +09001494 lba |= ((u64)cdb[2]) << 56;
1495 lba |= ((u64)cdb[3]) << 48;
1496 lba |= ((u64)cdb[4]) << 40;
1497 lba |= ((u64)cdb[5]) << 32;
1498 lba |= ((u64)cdb[6]) << 24;
1499 lba |= ((u64)cdb[7]) << 16;
1500 lba |= ((u64)cdb[8]) << 8;
1501 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001502
Tejun Heo542b1442006-12-17 10:45:08 +09001503 len |= ((u32)cdb[10]) << 24;
1504 len |= ((u32)cdb[11]) << 16;
1505 len |= ((u32)cdb[12]) << 8;
1506 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001507
1508 *plba = lba;
1509 *plen = len;
1510}
1511
1512/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1514 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 *
1516 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1517 *
1518 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001519 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 *
1521 * RETURNS:
1522 * Zero on success, non-zero on error.
1523 */
Tejun Heoad706992006-12-17 10:45:57 +09001524static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525{
Tejun Heo542b1442006-12-17 10:45:08 +09001526 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001528 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001530 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001531 u64 block;
1532 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
1534 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1535 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
Tejun Heo2e5704f2006-12-17 10:46:33 +09001537 if (cdb[0] == VERIFY) {
1538 if (scmd->cmd_len < 10)
1539 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001540 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001541 } else if (cdb[0] == VERIFY_16) {
1542 if (scmd->cmd_len < 16)
1543 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001544 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001545 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001546 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
Albert Lee8bf62ece2005-05-12 15:29:42 -04001548 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001549 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001550 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001551 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001552 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001553 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554
Albert Lee07506692005-10-12 15:04:18 +08001555 if (dev->flags & ATA_DFLAG_LBA) {
1556 tf->flags |= ATA_TFLAG_LBA;
1557
Albert Leec6a33e22005-10-12 15:12:26 +08001558 if (lba_28_ok(block, n_block)) {
1559 /* use LBA28 */
1560 tf->command = ATA_CMD_VERIFY;
1561 tf->device |= (block >> 24) & 0xf;
1562 } else if (lba_48_ok(block, n_block)) {
1563 if (!(dev->flags & ATA_DFLAG_LBA48))
1564 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001565
1566 /* use LBA48 */
1567 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001568 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569
Albert Lee8bf62ece2005-05-12 15:29:42 -04001570 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571
Albert Lee8bf62ece2005-05-12 15:29:42 -04001572 tf->hob_lbah = (block >> 40) & 0xff;
1573 tf->hob_lbam = (block >> 32) & 0xff;
1574 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001575 } else
1576 /* request too large even for LBA48 */
1577 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001578
1579 tf->nsect = n_block & 0xff;
1580
1581 tf->lbah = (block >> 16) & 0xff;
1582 tf->lbam = (block >> 8) & 0xff;
1583 tf->lbal = block & 0xff;
1584
1585 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001587 /* CHS */
1588 u32 sect, head, cyl, track;
1589
Albert Leec6a33e22005-10-12 15:12:26 +08001590 if (!lba_28_ok(block, n_block))
1591 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001592
Albert Lee8bf62ece2005-05-12 15:29:42 -04001593 /* Convert LBA to CHS */
1594 track = (u32)block / dev->sectors;
1595 cyl = track / dev->heads;
1596 head = track % dev->heads;
1597 sect = (u32)block % dev->sectors + 1;
1598
Albert Leec187c4b2005-10-04 08:46:51 -04001599 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1600 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001601
1602 /* Check whether the converted CHS can fit.
1603 Cylinder: 0-65535
Albert Lee8bf62ece2005-05-12 15:29:42 -04001604 Head: 0-15
1605 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001606 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001607 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001608
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001610 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1611 tf->lbal = sect;
1612 tf->lbam = cyl;
1613 tf->lbah = cyl >> 8;
1614 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 }
1616
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001618
1619invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001620 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001621 /* "Invalid field in cbd" */
1622 return 1;
1623
1624out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001625 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001626 /* "Logical Block Address out of range" */
1627 return 1;
1628
1629nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001630 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001631 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632}
1633
1634/**
1635 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1636 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 *
1638 * Converts any of six SCSI read/write commands into the
1639 * ATA counterpart, including starting sector (LBA),
1640 * sector count, and taking into account the device's LBA48
1641 * support.
1642 *
1643 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1644 * %WRITE_16 are currently supported.
1645 *
1646 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001647 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 *
1649 * RETURNS:
1650 * Zero on success, non-zero on error.
1651 */
Tejun Heoad706992006-12-17 10:45:57 +09001652static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653{
Tejun Heo542b1442006-12-17 10:45:08 +09001654 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001655 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001656 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001657 u64 block;
1658 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001659 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Tejun Heo542b1442006-12-17 10:45:08 +09001661 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001662 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001664 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001665 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001666 case READ_10:
1667 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001668 if (unlikely(scmd->cmd_len < 10))
1669 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001670 scsi_10_lba_len(cdb, &block, &n_block);
1671 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001672 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001673 break;
1674 case READ_6:
1675 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001676 if (unlikely(scmd->cmd_len < 6))
1677 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001678 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001679
1680 /* for 6-byte r/w commands, transfer length 0
1681 * means 256 blocks of data, not 0 block.
1682 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001683 if (!n_block)
1684 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001685 break;
1686 case READ_16:
1687 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001688 if (unlikely(scmd->cmd_len < 16))
1689 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001690 scsi_16_lba_len(cdb, &block, &n_block);
1691 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001692 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001693 break;
1694 default:
Albert Lee8bf62ece2005-05-12 15:29:42 -04001695 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001696 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 }
1698
Albert Lee8bf62ece2005-05-12 15:29:42 -04001699 /* Check and compose ATA command */
1700 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001701 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1702 * length 0 means transfer 0 block of data.
1703 * However, for ATA R/W commands, sector count 0 means
1704 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001705 *
1706 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001707 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001708 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001709
Tejun Heobd056d72006-11-14 22:47:10 +09001710 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001711 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001712
Tejun Heobd056d72006-11-14 22:47:10 +09001713 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1714 qc->tag);
1715 if (likely(rc == 0))
1716 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001717
Tejun Heobd056d72006-11-14 22:47:10 +09001718 if (rc == -ERANGE)
1719 goto out_of_range;
1720 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001721invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001722 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001723 /* "Invalid field in cbd" */
1724 return 1;
1725
1726out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001727 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001728 /* "Logical Block Address out of range" */
1729 return 1;
1730
1731nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001732 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001733 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734}
1735
Tejun Heo77853bf2006-01-23 13:09:36 +09001736static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737{
Tejun Heoc31f5712006-11-22 12:39:43 +09001738 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001740 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001741 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742
Jeff Garzikb0955182005-05-12 15:45:22 -04001743 /* For ATA pass thru (SAT) commands, generate a sense block if
1744 * user mandated it or if there's an error. Note that if we
1745 * generate because the user forced us to, a check condition
1746 * is generated and the ATA register values are returned
1747 * whether the command completed successfully or not. If there
1748 * was no error, SK, ASC and ASCQ will all be zero.
1749 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001750 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001751 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001752 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001753 } else {
1754 if (!need_sense) {
1755 cmd->result = SAM_STAT_GOOD;
1756 } else {
1757 /* TODO: decide which descriptor format to use
1758 * for 48b LBA devices and call that here
1759 * instead of the fixed desc, which is only
1760 * good for smaller LBA (and maybe CHS?)
1761 * devices.
1762 */
Tejun Heo750426a2006-11-14 22:37:35 +09001763 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001764 }
1765 }
1766
Tejun Heod9aca222007-05-17 16:43:26 +02001767 /* XXX: track spindown state for spindown skipping and warning */
Tejun Heo13b8d092007-05-15 12:29:22 +02001768 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1769 qc->tf.command == ATA_CMD_STANDBYNOW1))
1770 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1771 else if (likely(system_state != SYSTEM_HALT &&
1772 system_state != SYSTEM_POWER_OFF))
1773 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1774
Tejun Heoc31f5712006-11-22 12:39:43 +09001775 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001776 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777
1778 qc->scsidone(cmd);
1779
Tejun Heo77853bf2006-01-23 13:09:36 +09001780 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781}
1782
1783/**
1784 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 * @dev: ATA device to which the command is addressed
1786 * @cmd: SCSI command to execute
1787 * @done: SCSI command completion function
1788 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1789 *
1790 * Our ->queuecommand() function has decided that the SCSI
1791 * command issued can be directly translated into an ATA
1792 * command, rather than handled internally.
1793 *
1794 * This function sets up an ata_queued_cmd structure for the
1795 * SCSI command, and sends that ata_queued_cmd to the hardware.
1796 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001797 * The xlat_func argument (actor) returns 0 if ready to execute
1798 * ATA command, else 1 to finish translation. If 1 is returned
1799 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1800 * to be set reflecting an error condition or clean (early)
1801 * termination.
1802 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001804 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001805 *
1806 * RETURNS:
1807 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1808 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001810static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1811 void (*done)(struct scsi_cmnd *),
1812 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001814 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001816 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817
1818 VPRINTK("ENTER\n");
1819
Tejun Heo3373efd2006-05-15 20:57:53 +09001820 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001822 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823
1824 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001825 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1826 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001827 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001828 ata_dev_printk(dev, KERN_WARNING,
1829 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001830 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 }
1832
Boaz Harrosh71201652007-09-18 17:48:50 +02001833 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834
1835 qc->dma_dir = cmd->sc_data_direction;
1836 }
1837
1838 qc->complete_fn = ata_scsi_qc_complete;
1839
Tejun Heoad706992006-12-17 10:45:57 +09001840 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001841 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842
Tejun Heo31cc23b2007-09-23 13:14:12 +09001843 if (ap->ops->qc_defer) {
1844 if ((rc = ap->ops->qc_defer(qc)))
1845 goto defer;
1846 }
1847
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001849 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850
1851 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001852 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
Douglas Gilbertae006512005-10-09 09:09:35 -04001854early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001855 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001856 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001857 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001858 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001859
1860err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001862 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001863 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001864err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001865 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001866 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001867
1868defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001869 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001870 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001871 if (rc == ATA_DEFER_LINK)
1872 return SCSI_MLQUEUE_DEVICE_BUSY;
1873 else
1874 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875}
1876
1877/**
1878 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001879 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001880 * @flags: unsigned long variable to store irq enable status
1881 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 *
Tejun Heo87340e92008-04-28 17:48:51 +09001883 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 *
1885 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001886 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 *
1888 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001889 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 */
Tejun Heo87340e92008-04-28 17:48:51 +09001891static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1892 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893{
Tejun Heo87340e92008-04-28 17:48:51 +09001894 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895
Tejun Heo87340e92008-04-28 17:48:51 +09001896 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1897 if (copy_in)
1898 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1899 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1900 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901}
1902
1903/**
1904 * ata_scsi_rbuf_put - Unmap response buffer.
1905 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001906 * @copy_out: copy out result
1907 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 *
Tejun Heo87340e92008-04-28 17:48:51 +09001909 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1910 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 *
1912 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001913 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 */
Tejun Heo87340e92008-04-28 17:48:51 +09001915static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1916 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917{
Tejun Heo87340e92008-04-28 17:48:51 +09001918 if (copy_out)
1919 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1920 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1921 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922}
1923
1924/**
1925 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1926 * @args: device IDENTIFY data / SCSI command of interest.
1927 * @actor: Callback hook for desired SCSI command simulator
1928 *
1929 * Takes care of the hard work of simulating a SCSI command...
1930 * Mapping the response buffer, calling the command's handler,
1931 * and handling the handler's return value. This return value
1932 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001933 * completed successfully (0), or not (in which case cmd->result
1934 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 *
1936 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001937 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 */
Tejun Heof0761be2008-04-28 17:16:52 +09001939static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001940 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941{
1942 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001943 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001945 unsigned long flags;
1946
Tejun Heo87340e92008-04-28 17:48:51 +09001947 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1948 rc = actor(args, rbuf);
1949 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001950
Douglas Gilbertae006512005-10-09 09:09:35 -04001951 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001953 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954}
1955
1956/**
1957 * ata_scsiop_inq_std - Simulate INQUIRY command
1958 * @args: device IDENTIFY data / SCSI command of interest.
1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 *
1961 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001962 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 *
1964 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001965 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966 */
Tejun Heo87340e92008-04-28 17:48:51 +09001967static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968{
Tejun Heo87340e92008-04-28 17:48:51 +09001969 const u8 versions[] = {
1970 0x60, /* SAM-3 (no version claimed) */
1971
1972 0x03,
1973 0x20, /* SBC-2 (no version claimed) */
1974
1975 0x02,
1976 0x60 /* SPC-3 (no version claimed) */
1977 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 u8 hdr[] = {
1979 TYPE_DISK,
1980 0,
1981 0x5, /* claim SPC-3 version compatibility */
1982 2,
1983 95 - 4
1984 };
1985
Tejun Heo87340e92008-04-28 17:48:51 +09001986 VPRINTK("ENTER\n");
1987
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988 /* set scsi removeable (RMB) bit per ata bit */
1989 if (ata_id_removeable(args->id))
1990 hdr[1] |= (1 << 7);
1991
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001993 memcpy(&rbuf[8], "ATA ", 8);
1994 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1995 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996
Tejun Heo87340e92008-04-28 17:48:51 +09001997 if (rbuf[32] == 0 || rbuf[32] == ' ')
1998 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999
Tejun Heo87340e92008-04-28 17:48:51 +09002000 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001
2002 return 0;
2003}
2004
2005/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002006 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 * @args: device IDENTIFY data / SCSI command of interest.
2008 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05002010 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 *
2012 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002013 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014 */
Tejun Heo87340e92008-04-28 17:48:51 +09002015static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016{
2017 const u8 pages[] = {
2018 0x00, /* page 0x00, this page */
2019 0x80, /* page 0x80, unit serial no page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002020 0x83, /* page 0x83, device ident page */
2021 0x89, /* page 0x89, ata info page */
2022 0xb1, /* page 0xb1, block device characteristics page */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 };
Tejun Heo87340e92008-04-28 17:48:51 +09002024
Jeff Garzikb142eb62006-03-21 20:37:47 -05002025 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09002026 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 return 0;
2028}
2029
2030/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002031 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 * @args: device IDENTIFY data / SCSI command of interest.
2033 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 *
2035 * Returns ATA device serial number.
2036 *
2037 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002038 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 */
Tejun Heo87340e92008-04-28 17:48:51 +09002040static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041{
2042 const u8 hdr[] = {
2043 0,
2044 0x80, /* this page code */
2045 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09002046 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 };
Tejun Heo87340e92008-04-28 17:48:51 +09002048
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09002050 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2051 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 return 0;
2053}
2054
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05002056 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 * @args: device IDENTIFY data / SCSI command of interest.
2058 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05002060 * Yields two logical unit device identification designators:
2061 * - vendor specific ASCII containing the ATA serial number
2062 * - SAT defined "t10 vendor id based" containing ASCII vendor
2063 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 *
2065 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002066 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067 */
Tejun Heo87340e92008-04-28 17:48:51 +09002068static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069{
Jeff Garzikb142eb62006-03-21 20:37:47 -05002070 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09002071 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05002072
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05002074 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075
Tejun Heo87340e92008-04-28 17:48:51 +09002076 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2077 rbuf[num + 0] = 2;
2078 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2079 num += 4;
2080 ata_id_string(args->id, (unsigned char *) rbuf + num,
2081 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2082 num += ATA_ID_SERNO_LEN;
2083
2084 /* SAT defined lu model and serial numbers descriptor */
2085 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2086 rbuf[num + 0] = 2;
2087 rbuf[num + 1] = 1;
2088 rbuf[num + 3] = sat_model_serial_desc_len;
2089 num += 4;
2090 memcpy(rbuf + num, "ATA ", 8);
2091 num += 8;
2092 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2093 ATA_ID_PROD_LEN);
2094 num += ATA_ID_PROD_LEN;
2095 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2096 ATA_ID_SERNO_LEN);
2097 num += ATA_ID_SERNO_LEN;
2098
Jeff Garzikb142eb62006-03-21 20:37:47 -05002099 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 return 0;
2101}
2102
2103/**
Jeff Garzikad355b42007-09-21 20:38:03 -04002104 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2105 * @args: device IDENTIFY data / SCSI command of interest.
2106 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04002107 *
2108 * Yields SAT-specified ATA VPD page.
2109 *
2110 * LOCKING:
2111 * spin_lock_irqsave(host lock)
2112 */
Tejun Heo87340e92008-04-28 17:48:51 +09002113static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04002114{
Jeff Garzikad355b42007-09-21 20:38:03 -04002115 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04002116
Jeff Garzikad355b42007-09-21 20:38:03 -04002117 memset(&tf, 0, sizeof(tf));
2118
Tejun Heo87340e92008-04-28 17:48:51 +09002119 rbuf[1] = 0x89; /* our page code */
2120 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2121 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04002122
Tejun Heo87340e92008-04-28 17:48:51 +09002123 memcpy(&rbuf[8], "linux ", 8);
2124 memcpy(&rbuf[16], "libata ", 16);
2125 memcpy(&rbuf[32], DRV_VERSION, 4);
2126 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04002127
2128 /* we don't store the ATA device signature, so we fake it */
2129
2130 tf.command = ATA_DRDY; /* really, this is Status reg */
2131 tf.lbal = 0x1;
2132 tf.nsect = 0x1;
2133
Tejun Heo87340e92008-04-28 17:48:51 +09002134 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2135 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04002136
Tejun Heo87340e92008-04-28 17:48:51 +09002137 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04002138
Tejun Heo87340e92008-04-28 17:48:51 +09002139 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04002140 return 0;
2141}
2142
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002143static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2144{
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002145 int form_factor = ata_id_form_factor(args->id);
2146 int media_rotation_rate = ata_id_rotation_rate(args->id);
2147
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002148 rbuf[1] = 0xb1;
2149 rbuf[3] = 0x3c;
Martin K. Petersen4bca3282009-05-15 00:40:35 -04002150 rbuf[4] = media_rotation_rate >> 8;
2151 rbuf[5] = media_rotation_rate;
2152 rbuf[7] = form_factor;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002153
2154 return 0;
2155}
2156
Jeff Garzikad355b42007-09-21 20:38:03 -04002157/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002158 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 * @args: device IDENTIFY data / SCSI command of interest.
2160 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 *
2162 * No operation. Simply returns success to caller, to indicate
2163 * that the caller should successfully complete this SCSI command.
2164 *
2165 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002166 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 */
Tejun Heo87340e92008-04-28 17:48:51 +09002168static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169{
2170 VPRINTK("ENTER\n");
2171 return 0;
2172}
2173
2174/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 * ata_msense_caching - Simulate MODE SENSE caching info page
2176 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09002177 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178 *
2179 * Generate a caching info page, which conditionally indicates
2180 * write caching to the SCSI layer, depending on device
2181 * capabilities.
2182 *
2183 * LOCKING:
2184 * None.
2185 */
Tejun Heo87340e92008-04-28 17:48:51 +09002186static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187{
Tejun Heo87340e92008-04-28 17:48:51 +09002188 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002190 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002192 buf[12] |= (1 << 5); /* disable read ahead */
2193 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194}
2195
2196/**
2197 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09002198 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199 *
2200 * Generate a generic MODE SENSE control mode page.
2201 *
2202 * LOCKING:
2203 * None.
2204 */
Tejun Heo87340e92008-04-28 17:48:51 +09002205static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206{
Tejun Heo87340e92008-04-28 17:48:51 +09002207 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002208 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209}
2210
2211/**
2212 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07002213 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 *
2215 * Generate a generic MODE SENSE r/w error recovery page.
2216 *
2217 * LOCKING:
2218 * None.
2219 */
Tejun Heo87340e92008-04-28 17:48:51 +09002220static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221{
Tejun Heo87340e92008-04-28 17:48:51 +09002222 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002223 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224}
2225
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002226/*
2227 * We can turn this into a real blacklist if it's needed, for now just
2228 * blacklist any Maxtor BANC1G10 revision firmware
2229 */
2230static int ata_dev_supports_fua(u16 *id)
2231{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002232 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002233
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002234 if (!libata_fua)
2235 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002236 if (!ata_id_has_fua(id))
2237 return 0;
2238
Tejun Heoa0cf7332007-01-02 20:18:49 +09002239 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2240 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002241
Tejun Heo2e026712006-02-12 22:47:04 +09002242 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002243 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002244 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002245 return 1;
2246
2247 return 0; /* blacklisted */
2248}
2249
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250/**
2251 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2252 * @args: device IDENTIFY data / SCSI command of interest.
2253 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002255 * Simulate MODE SENSE commands. Assume this is invoked for direct
2256 * access devices (e.g. disks) only. There should be no block
2257 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 *
2259 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002260 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 */
Tejun Heo87340e92008-04-28 17:48:51 +09002262static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002264 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002265 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002266 const u8 sat_blk_desc[] = {
2267 0, 0, 0, 0, /* number of blocks: sat unspecified */
2268 0,
2269 0, 0x2, 0x0 /* block length: 512 bytes */
2270 };
2271 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002272 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002273 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274
2275 VPRINTK("ENTER\n");
2276
2277 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002278 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2279 /*
2280 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002282
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002284 switch (page_control) {
2285 case 0: /* current */
2286 break; /* supported */
2287 case 3: /* saved */
2288 goto saving_not_supp;
2289 case 1: /* changeable */
2290 case 2: /* defaults */
2291 default:
2292 goto invalid_fld;
2293 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294
Tejun Heo87340e92008-04-28 17:48:51 +09002295 if (six_byte)
2296 p += 4 + (ebd ? 8 : 0);
2297 else
2298 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002300 pg = scsicmd[2] & 0x3f;
2301 spg = scsicmd[3];
2302 /*
2303 * No mode subpages supported (yet) but asking for _all_
2304 * subpages may be valid
2305 */
2306 if (spg && (spg != ALL_SUB_MPAGES))
2307 goto invalid_fld;
2308
2309 switch(pg) {
2310 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002311 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 break;
2313
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002314 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002315 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316 break;
2317
Tejun Heo87340e92008-04-28 17:48:51 +09002318 case CONTROL_MPAGE:
2319 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002322 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002323 p += ata_msense_rw_recovery(p);
2324 p += ata_msense_caching(args->id, p);
2325 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 break;
2327
2328 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002329 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330 }
2331
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002332 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002333 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002334 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2335 dpofua = 1 << 4;
2336
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002338 rbuf[0] = p - rbuf - 1;
2339 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002340 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002341 rbuf[3] = sizeof(sat_blk_desc);
2342 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002345 unsigned int output_len = p - rbuf - 2;
2346
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002348 rbuf[1] = output_len;
2349 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002350 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002351 rbuf[7] = sizeof(sat_blk_desc);
2352 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002356
2357invalid_fld:
2358 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2359 /* "Invalid field in cbd" */
2360 return 1;
2361
2362saving_not_supp:
2363 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2364 /* "Saving parameters not supported" */
2365 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366}
2367
2368/**
2369 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2370 * @args: device IDENTIFY data / SCSI command of interest.
2371 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372 *
2373 * Simulate READ CAPACITY commands.
2374 *
2375 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002376 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377 */
Tejun Heo87340e92008-04-28 17:48:51 +09002378static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379{
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002380 struct ata_device *dev = args->dev;
2381 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2382 u8 log_per_phys = 0;
2383 u16 lowest_aligned = 0;
2384 u16 word_106 = dev->id[106];
2385 u16 word_209 = dev->id[209];
2386
2387 if ((word_106 & 0xc000) == 0x4000) {
2388 /* Number and offset of logical sectors per physical sector */
2389 if (word_106 & (1 << 13))
2390 log_per_phys = word_106 & 0xf;
2391 if ((word_209 & 0xc000) == 0x4000) {
2392 u16 first = dev->id[209] & 0x3fff;
2393 if (first > 0)
2394 lowest_aligned = (1 << log_per_phys) - first;
2395 }
2396 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397
2398 VPRINTK("ENTER\n");
2399
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002401 if (last_lba >= 0xffffffffULL)
2402 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002403
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002405 rbuf[0] = last_lba >> (8 * 3);
2406 rbuf[1] = last_lba >> (8 * 2);
2407 rbuf[2] = last_lba >> (8 * 1);
2408 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
2410 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002411 rbuf[6] = ATA_SECT_SIZE >> 8;
2412 rbuf[7] = ATA_SECT_SIZE & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002413 } else {
2414 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002415 rbuf[0] = last_lba >> (8 * 7);
2416 rbuf[1] = last_lba >> (8 * 6);
2417 rbuf[2] = last_lba >> (8 * 5);
2418 rbuf[3] = last_lba >> (8 * 4);
2419 rbuf[4] = last_lba >> (8 * 3);
2420 rbuf[5] = last_lba >> (8 * 2);
2421 rbuf[6] = last_lba >> (8 * 1);
2422 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423
2424 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002425 rbuf[10] = ATA_SECT_SIZE >> 8;
2426 rbuf[11] = ATA_SECT_SIZE & 0xff;
Martin K. Petersen61d79a82009-05-15 00:40:34 -04002427
2428 rbuf[12] = 0;
2429 rbuf[13] = log_per_phys;
2430 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2431 rbuf[15] = lowest_aligned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 }
2433
2434 return 0;
2435}
2436
2437/**
2438 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2439 * @args: device IDENTIFY data / SCSI command of interest.
2440 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 *
2442 * Simulate REPORT LUNS command.
2443 *
2444 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002445 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446 */
Tejun Heo87340e92008-04-28 17:48:51 +09002447static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448{
2449 VPRINTK("ENTER\n");
2450 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2451
2452 return 0;
2453}
2454
Tejun Heo77853bf2006-01-23 13:09:36 +09002455static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002456{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002457 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002458 /* FIXME: not quite right; we don't want the
2459 * translation of taskfile registers into
2460 * a sense descriptors, since that's only
2461 * correct for ATA, not ATAPI
2462 */
Tejun Heo750426a2006-11-14 22:37:35 +09002463 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002464 }
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002465
2466 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002467 ata_qc_free(qc);
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002468}
2469
2470/* is it pointless to prefer PIO for "safety reasons"? */
2471static inline int ata_pio_use_silly(struct ata_port *ap)
2472{
2473 return (ap->flags & ATA_FLAG_PIO_DMA);
2474}
2475
2476static void atapi_request_sense(struct ata_queued_cmd *qc)
2477{
2478 struct ata_port *ap = qc->ap;
2479 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002480
2481 DPRINTK("ATAPI request sense\n");
2482
Jeff Garzika939c962005-10-05 17:09:16 -04002483 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002484 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002485
Tejun Heo127102a2008-04-07 22:47:21 +09002486#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002487 if (ap->ops->sff_tf_read)
2488 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002489#endif
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002490
2491 /* fill these in, for the case where they are -not- overwritten */
2492 cmd->sense_buffer[0] = 0x70;
2493 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2494
2495 ata_qc_reinit(qc);
2496
Tejun Heo93f8fec2007-12-05 16:43:01 +09002497 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002498 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002499 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002500 qc->dma_dir = DMA_FROM_DEVICE;
2501
Tejun Heo6e7846e2006-02-12 23:32:58 +09002502 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002503 qc->cdb[0] = REQUEST_SENSE;
2504 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2505
2506 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2507 qc->tf.command = ATA_CMD_PACKET;
2508
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002509 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002510 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002511 qc->tf.feature |= ATAPI_PKT_DMA;
2512 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002513 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002514 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2515 qc->tf.lbah = 0;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002516 }
Jeff Garzika939c962005-10-05 17:09:16 -04002517 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2518
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002519 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002520
Tejun Heo8e0e6942006-03-31 20:41:11 +09002521 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002522
2523 DPRINTK("EXIT\n");
2524}
2525
Tejun Heo77853bf2006-01-23 13:09:36 +09002526static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527{
2528 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002529 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530
Jeff Garzika7dac442005-10-30 04:44:42 -05002531 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002532
Tejun Heo246619d2006-05-15 20:58:16 +09002533 /* handle completion from new EH */
2534 if (unlikely(qc->ap->ops->error_handler &&
2535 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2536
2537 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2538 /* FIXME: not quite right; we don't want the
2539 * translation of taskfile registers into a
2540 * sense descriptors, since that's only
2541 * correct for ATA, not ATAPI
2542 */
Tejun Heo750426a2006-11-14 22:37:35 +09002543 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002544 }
2545
Tejun Heo22aac082006-08-08 14:08:59 +09002546 /* SCSI EH automatically locks door if sdev->locked is
2547 * set. Sometimes door lock request continues to
2548 * fail, for example, when no media is present. This
2549 * creates a loop - SCSI EH issues door lock which
2550 * fails and gets invoked again to acquire sense data
2551 * for the failed command.
2552 *
2553 * If door lock fails, always clear sdev->locked to
2554 * avoid this infinite loop.
2555 */
2556 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2557 qc->dev->sdev->locked = 0;
2558
Tejun Heo246619d2006-05-15 20:58:16 +09002559 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2560 qc->scsidone(cmd);
2561 ata_qc_free(qc);
2562 return;
2563 }
2564
2565 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002566 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002568 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002569 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002570 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002571 /* FIXME: not quite right; we don't want the
2572 * translation of taskfile registers into
2573 * a sense descriptors, since that's only
2574 * correct for ATA, not ATAPI
2575 */
Tejun Heo750426a2006-11-14 22:37:35 +09002576 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002577 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578 u8 *scsicmd = cmd->cmnd;
2579
Tony Battersbyfd71da42005-12-21 16:35:44 -05002580 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002581 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002582 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002583
Tejun Heo87340e92008-04-28 17:48:51 +09002584 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002585
2586 /* ATAPI devices typically report zero for their SCSI version,
2587 * and sometimes deviate from the spec WRT response data
2588 * format. If SCSI version is reported as zero like normal,
2589 * then we make the following fixups: 1) Fake MMC-5 version,
2590 * to indicate to the Linux scsi midlayer this is a modern
2591 * device. 2) Ensure response data format / ATAPI information
2592 * are always correct.
2593 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002594 if (buf[2] == 0) {
2595 buf[2] = 0x5;
2596 buf[3] = 0x32;
2597 }
2598
Tejun Heo87340e92008-04-28 17:48:51 +09002599 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002601
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602 cmd->result = SAM_STAT_GOOD;
2603 }
2604
2605 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002606 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607}
2608/**
2609 * atapi_xlat - Initialize PACKET taskfile
2610 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611 *
2612 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002613 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614 *
2615 * RETURNS:
2616 * Zero on success, non-zero on failure.
2617 */
Tejun Heoad706992006-12-17 10:45:57 +09002618static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619{
Tejun Heo542b1442006-12-17 10:45:08 +09002620 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002622 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002623 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002624 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625
Tejun Heo2e5704f2006-12-17 10:46:33 +09002626 memset(qc->cdb, 0, dev->cdb_len);
2627 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628
2629 qc->complete_fn = atapi_qc_complete;
2630
2631 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002632 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633 qc->tf.flags |= ATA_TFLAG_WRITE;
2634 DPRINTK("direction: write\n");
2635 }
2636
2637 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002638 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002639
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002640 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002641 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002642 using_pio = 1;
2643
Tejun Heoe1902222007-11-26 20:58:02 +09002644 /* Some controller variants snoop this value for Packet
2645 * transfers to do state machine and FIFO management. Thus we
2646 * want to set it properly, and for DMA where it is
2647 * effectively meaningless.
2648 */
Tejun Heoaacda372008-03-18 17:47:43 +09002649 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002650
Tejun Heoe1902222007-11-26 20:58:02 +09002651 /* Most ATAPI devices which honor transfer chunk size don't
2652 * behave according to the spec when odd chunk size which
2653 * matches the transfer length is specified. If the number of
2654 * bytes to transfer is 2n+1. According to the spec, what
2655 * should happen is to indicate that 2n+1 is going to be
2656 * transferred and transfer 2n+2 bytes where the last byte is
2657 * padding.
2658 *
2659 * In practice, this doesn't happen. ATAPI devices first
2660 * indicate and transfer 2n bytes and then indicate and
2661 * transfer 2 bytes where the last byte is padding.
2662 *
2663 * This inconsistency confuses several controllers which
2664 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2665 * These controllers use actual number of transferred bytes to
2666 * update DMA poitner and transfer of 4n+2 bytes make those
2667 * controller push DMA pointer by 4n+4 bytes because SATA data
2668 * FISes are aligned to 4 bytes. This causes data corruption
2669 * and buffer overrun.
2670 *
2671 * Always setting nbytes to even number solves this problem
2672 * because then ATAPI devices don't have to split data at 2n
2673 * boundaries.
2674 */
2675 if (nbytes & 0x1)
2676 nbytes++;
2677
Alan Cox2db78dd2007-10-02 13:53:04 -07002678 qc->tf.lbam = (nbytes & 0xFF);
2679 qc->tf.lbah = (nbytes >> 8);
2680
Tejun Heo5895ef92008-06-17 12:36:26 +09002681 if (nodata)
2682 qc->tf.protocol = ATAPI_PROT_NODATA;
2683 else if (using_pio)
2684 qc->tf.protocol = ATAPI_PROT_PIO;
2685 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002686 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002687 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 qc->tf.feature |= ATAPI_PKT_DMA;
2689
Tejun Heo91163002008-02-21 13:25:50 +09002690 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2691 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002692 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002693 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 }
2695
Alan Cox2db78dd2007-10-02 13:53:04 -07002696
2697 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2698 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699 return 0;
2700}
2701
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002702static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002703{
Tejun Heo071f44b2008-04-07 22:47:22 +09002704 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002705 if (likely(devno < ata_link_max_devices(&ap->link)))
2706 return &ap->link.device[devno];
2707 } else {
2708 if (likely(devno < ap->nr_pmp_links))
2709 return &ap->pmp_link[devno].device[0];
2710 }
2711
Tejun Heoab5b3a52006-05-31 18:27:34 +09002712 return NULL;
2713}
2714
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002715static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2716 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002717{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002718 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002719
Tejun Heo41bda9c2007-08-06 18:36:24 +09002720 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002721 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002722 if (unlikely(scsidev->channel || scsidev->lun))
2723 return NULL;
2724 devno = scsidev->id;
2725 } else {
2726 if (unlikely(scsidev->id || scsidev->lun))
2727 return NULL;
2728 devno = scsidev->channel;
2729 }
2730
2731 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002732}
2733
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734/**
2735 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2736 * @ap: ATA port to which the device is attached
2737 * @scsidev: SCSI device from which we derive the ATA device
2738 *
2739 * Given various information provided in struct scsi_cmnd,
2740 * map that onto an ATA bus, and using that mapping
2741 * determine which ata_device is associated with the
2742 * SCSI command to be sent.
2743 *
2744 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002745 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 *
2747 * RETURNS:
2748 * Associated ATA device, or %NULL if not found.
2749 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002751ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002753 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754
Tejun Heo2486fa52008-07-31 07:52:40 +09002755 if (unlikely(!dev || !ata_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002756 return NULL;
2757
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 return dev;
2759}
2760
Jeff Garzikb0955182005-05-12 15:45:22 -04002761/*
2762 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2763 * @byte1: Byte 1 from pass-thru CDB.
2764 *
2765 * RETURNS:
2766 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2767 */
2768static u8
2769ata_scsi_map_proto(u8 byte1)
2770{
2771 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002772 case 3: /* Non-data */
2773 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002774
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002775 case 6: /* DMA */
2776 case 10: /* UDMA Data-in */
2777 case 11: /* UDMA Data-Out */
2778 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002779
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002780 case 4: /* PIO Data-in */
2781 case 5: /* PIO Data-out */
2782 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002783
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002784 case 0: /* Hard Reset */
2785 case 1: /* SRST */
2786 case 8: /* Device Diagnostic */
2787 case 9: /* Device Reset */
2788 case 7: /* DMA Queued */
2789 case 12: /* FPDMA */
2790 case 15: /* Return Response Info */
2791 default: /* Reserved */
2792 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002793 }
2794
2795 return ATA_PROT_UNKNOWN;
2796}
2797
2798/**
2799 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2800 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002801 *
2802 * Handles either 12 or 16-byte versions of the CDB.
2803 *
2804 * RETURNS:
2805 * Zero on success, non-zero on failure.
2806 */
Tejun Heoad706992006-12-17 10:45:57 +09002807static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002808{
2809 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002810 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002811 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002812 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002813
Tejun Heo542b1442006-12-17 10:45:08 +09002814 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002815 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002816
Alan Coxae8d4ee2007-11-04 22:05:49 -05002817 /*
2818 * Filter TPM commands by default. These provide an
2819 * essentially uncontrolled encrypted "back door" between
2820 * applications and the disk. Set libata.allow_tpm=1 if you
2821 * have a real reason for wanting to use them. This ensures
2822 * that installed software cannot easily mess stuff up without
2823 * user intent. DVR type users will probably ship with this enabled
2824 * for movie content management.
2825 *
2826 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2827 * for this and should do in future but that it is not sufficient as
2828 * DCS is an optional feature set. Thus we also do the software filter
2829 * so that we comply with the TC consortium stated goal that the user
2830 * can turn off TC features of their system.
2831 */
2832 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2833 goto invalid_fld;
2834
Alan Coxf79d4092006-05-22 16:55:11 +01002835 /* We may not issue DMA commands if no DMA mode is set */
2836 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2837 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002838
2839 /*
2840 * 12 and 16 byte CDBs use different offsets to
2841 * provide the various register values.
2842 */
Tejun Heo542b1442006-12-17 10:45:08 +09002843 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002844 /*
2845 * 16-byte CDB - may contain extended commands.
2846 *
2847 * If that is the case, copy the upper byte register values.
2848 */
Tejun Heo542b1442006-12-17 10:45:08 +09002849 if (cdb[1] & 0x01) {
2850 tf->hob_feature = cdb[3];
2851 tf->hob_nsect = cdb[5];
2852 tf->hob_lbal = cdb[7];
2853 tf->hob_lbam = cdb[9];
2854 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002855 tf->flags |= ATA_TFLAG_LBA48;
2856 } else
2857 tf->flags &= ~ATA_TFLAG_LBA48;
2858
2859 /*
2860 * Always copy low byte, device and command registers.
2861 */
Tejun Heo542b1442006-12-17 10:45:08 +09002862 tf->feature = cdb[4];
2863 tf->nsect = cdb[6];
2864 tf->lbal = cdb[8];
2865 tf->lbam = cdb[10];
2866 tf->lbah = cdb[12];
2867 tf->device = cdb[13];
2868 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002869 } else {
2870 /*
2871 * 12-byte CDB - incapable of extended commands.
2872 */
2873 tf->flags &= ~ATA_TFLAG_LBA48;
2874
Tejun Heo542b1442006-12-17 10:45:08 +09002875 tf->feature = cdb[3];
2876 tf->nsect = cdb[4];
2877 tf->lbal = cdb[5];
2878 tf->lbam = cdb[6];
2879 tf->lbah = cdb[7];
2880 tf->device = cdb[8];
2881 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002882 }
Albert Leefa4453c2007-06-07 15:52:07 +08002883
2884 /* enforce correct master/slave bit */
2885 tf->device = dev->devno ?
2886 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002887
Albert Lee1dce5892007-06-07 15:49:22 +08002888 /* sanity check for pio multi commands */
2889 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2890 goto invalid_fld;
2891
2892 if (is_multi_taskfile(tf)) {
2893 unsigned int multi_count = 1 << (cdb[1] >> 5);
2894
2895 /* compare the passed through multi_count
2896 * with the cached multi_count of libata
2897 */
2898 if (multi_count != dev->multi_count)
2899 ata_dev_printk(dev, KERN_WARNING,
2900 "invalid multi_count %u ignored\n",
2901 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002902 }
Albert Lee1dce5892007-06-07 15:49:22 +08002903
Mark Lord5a5dbd12007-03-16 10:22:26 -04002904 /* READ/WRITE LONG use a non-standard sect_size */
2905 qc->sect_size = ATA_SECT_SIZE;
2906 switch (tf->command) {
2907 case ATA_CMD_READ_LONG:
2908 case ATA_CMD_READ_LONG_ONCE:
2909 case ATA_CMD_WRITE_LONG:
2910 case ATA_CMD_WRITE_LONG_ONCE:
2911 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2912 goto invalid_fld;
Boaz Harrosh71201652007-09-18 17:48:50 +02002913 qc->sect_size = scsi_bufflen(scmd);
Mark Lord5a5dbd12007-03-16 10:22:26 -04002914 }
2915
Jeff Garzikb0955182005-05-12 15:45:22 -04002916 /*
2917 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2918 * SET_FEATURES - XFER MODE must be preceded/succeeded
2919 * by an update to hardware-specific registers for each
2920 * controller (i.e. the reason for ->set_piomode(),
2921 * ->set_dmamode(), and ->post_set_mode() hooks).
2922 */
2923 if ((tf->command == ATA_CMD_SET_FEATURES)
2924 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002925 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002926
2927 /*
2928 * Set flags so that all registers will be written,
2929 * and pass on write indication (used for PIO/DMA
2930 * setup.)
2931 */
2932 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2933
Tejun Heo542b1442006-12-17 10:45:08 +09002934 if (scmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002935 tf->flags |= ATA_TFLAG_WRITE;
2936
2937 /*
2938 * Set transfer length.
2939 *
2940 * TODO: find out if we need to do more here to
2941 * cover scatter/gather case.
2942 */
Tejun Heoaacda372008-03-18 17:47:43 +09002943 ata_qc_set_pc_nbytes(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04002944
Tejun Heoe027bd32007-10-26 16:19:26 +09002945 /* request result TF and be quiet about device error */
2946 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
Tejun Heoe61e0672006-05-15 20:57:40 +09002947
Jeff Garzikb0955182005-05-12 15:45:22 -04002948 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002949
2950 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002951 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002952 /* "Invalid field in cdb" */
2953 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002954}
2955
Linus Torvalds1da177e2005-04-16 15:20:36 -07002956/**
2957 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2958 * @dev: ATA device
2959 * @cmd: SCSI command opcode to consider
2960 *
2961 * Look up the SCSI command given, and determine whether the
2962 * SCSI command is to be translated or simulated.
2963 *
2964 * RETURNS:
2965 * Pointer to translation function if possible, %NULL if not.
2966 */
2967
2968static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2969{
2970 switch (cmd) {
2971 case READ_6:
2972 case READ_10:
2973 case READ_16:
2974
2975 case WRITE_6:
2976 case WRITE_10:
2977 case WRITE_16:
2978 return ata_scsi_rw_xlat;
2979
2980 case SYNCHRONIZE_CACHE:
2981 if (ata_try_flush_cache(dev))
2982 return ata_scsi_flush_xlat;
2983 break;
2984
2985 case VERIFY:
2986 case VERIFY_16:
2987 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002988
2989 case ATA_12:
2990 case ATA_16:
2991 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002992
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002993 case START_STOP:
2994 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995 }
2996
2997 return NULL;
2998}
2999
3000/**
3001 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3002 * @ap: ATA port to which the command was being sent
3003 * @cmd: SCSI command to dump
3004 *
3005 * Prints the contents of a SCSI command via printk().
3006 */
3007
3008static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3009 struct scsi_cmnd *cmd)
3010{
3011#ifdef ATA_DEBUG
3012 struct scsi_device *scsidev = cmd->device;
3013 u8 *scsicmd = cmd->cmnd;
3014
3015 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09003016 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003017 scsidev->channel, scsidev->id, scsidev->lun,
3018 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3019 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3020 scsicmd[8]);
3021#endif
3022}
3023
Tejun Heo542b1442006-12-17 10:45:08 +09003024static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09003025 void (*done)(struct scsi_cmnd *),
3026 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06003027{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003028 u8 scsi_op = scmd->cmnd[0];
3029 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09003030 int rc = 0;
3031
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003032 if (dev->class == ATA_DEV_ATA) {
3033 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3034 goto bad_cdb_len;
3035
3036 xlat_func = ata_get_xlat_func(dev, scsi_op);
3037 } else {
3038 if (unlikely(!scmd->cmd_len))
3039 goto bad_cdb_len;
3040
3041 xlat_func = NULL;
3042 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3043 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09003044 int len = COMMAND_SIZE(scsi_op);
3045 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003046 goto bad_cdb_len;
3047
3048 xlat_func = atapi_xlat;
3049 } else {
3050 /* ATA_16 passthru, treat as an ATA command */
3051 if (unlikely(scmd->cmd_len > 16))
3052 goto bad_cdb_len;
3053
3054 xlat_func = ata_get_xlat_func(dev, scsi_op);
3055 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09003056 }
3057
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003058 if (xlat_func)
3059 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3060 else
3061 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09003062
3063 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003064
3065 bad_cdb_len:
3066 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3067 scmd->cmd_len, scsi_op, dev->cdb_len);
3068 scmd->result = DID_ERROR << 16;
3069 done(scmd);
3070 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06003071}
3072
Linus Torvalds1da177e2005-04-16 15:20:36 -07003073/**
3074 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3075 * @cmd: SCSI command to be sent
3076 * @done: Completion function, called when command is complete
3077 *
3078 * In some cases, this function translates SCSI commands into
3079 * ATA taskfiles, and queues the taskfiles to be sent to
3080 * hardware. In other cases, this function simulates a
3081 * SCSI device by evaluating and responding to certain
3082 * SCSI commands. This creates the overall effect of
3083 * ATA and ATAPI devices appearing as SCSI devices.
3084 *
3085 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003086 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003087 *
3088 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09003089 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3090 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003091 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3093{
3094 struct ata_port *ap;
3095 struct ata_device *dev;
3096 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05003097 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09003098 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099
Jeff Garzik35bb94b2006-04-11 13:12:34 -04003100 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003101
3102 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003103 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104
3105 ata_scsi_dump_cdb(ap, cmd);
3106
3107 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003108 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09003109 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003110 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003111 cmd->result = (DID_BAD_TARGET << 16);
3112 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 }
3114
Jeff Garzikba6a1302006-06-22 23:46:10 -04003115 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003116 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09003117 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118}
3119
3120/**
3121 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003122 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123 * @cmd: SCSI command being sent to device.
3124 * @done: SCSI command completion function.
3125 *
3126 * Interprets and directly executes a select list of SCSI commands
3127 * that can be handled internally.
3128 *
3129 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003130 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003131 */
3132
Tejun Heo3373efd2006-05-15 20:57:53 +09003133void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134 void (*done)(struct scsi_cmnd *))
3135{
3136 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04003137 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04003138 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139
Tejun Heo9a3dccc2006-01-06 09:56:18 +01003140 args.dev = dev;
3141 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142 args.cmd = cmd;
3143 args.done = done;
3144
3145 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003146 /* TODO: worth improving? */
3147 case FORMAT_UNIT:
3148 ata_scsi_invalid_field(cmd, done);
3149 break;
3150
3151 case INQUIRY:
3152 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04003153 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003154 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3155 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3156 else switch (scsicmd[2]) {
3157 case 0x00:
3158 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003160 case 0x80:
3161 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003162 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003163 case 0x83:
3164 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003166 case 0x89:
3167 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003168 break;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06003169 case 0xb1:
3170 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3171 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003172 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003173 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003174 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003175 }
3176 break;
3177
3178 case MODE_SENSE:
3179 case MODE_SENSE_10:
3180 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3181 break;
3182
3183 case MODE_SELECT: /* unconditionally return */
3184 case MODE_SELECT_10: /* bad-field-in-cdb */
3185 ata_scsi_invalid_field(cmd, done);
3186 break;
3187
3188 case READ_CAPACITY:
3189 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3190 break;
3191
3192 case SERVICE_ACTION_IN:
3193 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3194 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3195 else
3196 ata_scsi_invalid_field(cmd, done);
3197 break;
3198
3199 case REPORT_LUNS:
3200 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3201 break;
3202
3203 case REQUEST_SENSE:
3204 ata_scsi_set_sense(cmd, 0, 0, 0);
3205 cmd->result = (DRIVER_SENSE << 24);
3206 done(cmd);
3207 break;
3208
3209 /* if we reach this, then writeback caching is disabled,
3210 * turning this into a no-op.
3211 */
3212 case SYNCHRONIZE_CACHE:
3213 /* fall through */
3214
3215 /* no-op's, complete with success */
3216 case REZERO_UNIT:
3217 case SEEK_6:
3218 case SEEK_10:
3219 case TEST_UNIT_READY:
3220 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3221 break;
3222
3223 case SEND_DIAGNOSTIC:
3224 tmp8 = scsicmd[1] & ~(1 << 3);
3225 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3226 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3227 else
3228 ata_scsi_invalid_field(cmd, done);
3229 break;
3230
3231 /* all other commands */
3232 default:
3233 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3234 /* "Invalid command operation code" */
3235 done(cmd);
3236 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003237 }
3238}
3239
Tejun Heof3187192007-04-17 23:44:07 +09003240int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3241{
3242 int i, rc;
3243
3244 for (i = 0; i < host->n_ports; i++) {
3245 struct ata_port *ap = host->ports[i];
3246 struct Scsi_Host *shost;
3247
3248 rc = -ENOMEM;
3249 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3250 if (!shost)
3251 goto err_alloc;
3252
3253 *(struct ata_port **)&shost->hostdata[0] = ap;
3254 ap->scsi_host = shost;
3255
3256 shost->transportt = &ata_scsi_transport_template;
3257 shost->unique_id = ap->print_id;
3258 shost->max_id = 16;
3259 shost->max_lun = 1;
3260 shost->max_channel = 1;
3261 shost->max_cmd_len = 16;
3262
Tejun Heo31cc23b2007-09-23 13:14:12 +09003263 /* Schedule policy is determined by ->qc_defer()
3264 * callback and it needs to see every deferred qc.
3265 * Set host_blocked to 1 to prevent SCSI midlayer from
3266 * automatically deferring requests.
3267 */
3268 shost->max_host_blocked = 1;
3269
Tejun Heof3187192007-04-17 23:44:07 +09003270 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3271 if (rc)
3272 goto err_add;
3273 }
3274
3275 return 0;
3276
3277 err_add:
3278 scsi_host_put(host->ports[i]->scsi_host);
3279 err_alloc:
3280 while (--i >= 0) {
3281 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3282
3283 scsi_remove_host(shost);
3284 scsi_host_put(shost);
3285 }
3286 return rc;
3287}
3288
Tejun Heo1ae46312007-07-16 14:29:40 +09003289void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003290{
Tejun Heo1ae46312007-07-16 14:29:40 +09003291 int tries = 5;
3292 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003293 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003294 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003295
Tejun Heo198e0fe2006-04-02 18:51:52 +09003296 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003297 return;
3298
Tejun Heo1ae46312007-07-16 14:29:40 +09003299 repeat:
Tejun Heo1eca4362008-11-03 20:03:17 +09003300 ata_for_each_link(link, ap, EDGE) {
3301 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003302 struct scsi_device *sdev;
3303 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003304
Tejun Heo1eca4362008-11-03 20:03:17 +09003305 if (dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003306 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003307
Tejun Heo41bda9c2007-08-06 18:36:24 +09003308 if (ata_is_host_link(link))
3309 id = dev->devno;
3310 else
3311 channel = link->pmp;
3312
3313 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3314 NULL);
3315 if (!IS_ERR(sdev)) {
3316 dev->sdev = sdev;
3317 scsi_device_put(sdev);
3318 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003319 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003320 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003321
3322 /* If we scanned while EH was in progress or allocation
3323 * failure occurred, scan would have failed silently. Check
3324 * whether all devices are attached.
3325 */
Tejun Heo1eca4362008-11-03 20:03:17 +09003326 ata_for_each_link(link, ap, EDGE) {
3327 ata_for_each_dev(dev, link, ENABLED) {
3328 if (!dev->sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003329 goto exit_loop;
3330 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003331 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003332 exit_loop:
3333 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003334 return;
3335
3336 /* we're missing some SCSI devices */
3337 if (sync) {
3338 /* If caller requested synchrnous scan && we've made
3339 * any progress, sleep briefly and repeat.
3340 */
3341 if (dev != last_failed_dev) {
3342 msleep(100);
3343 last_failed_dev = dev;
3344 goto repeat;
3345 }
3346
3347 /* We might be failing to detect boot device, give it
3348 * a few more chances.
3349 */
3350 if (--tries) {
3351 msleep(100);
3352 goto repeat;
3353 }
3354
3355 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3356 "failed without making any progress,\n"
3357 " switching to async\n");
3358 }
3359
3360 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3361 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003362}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003363
3364/**
3365 * ata_scsi_offline_dev - offline attached SCSI device
3366 * @dev: ATA device to offline attached SCSI device for
3367 *
3368 * This function is called from ata_eh_hotplug() and responsible
3369 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003370 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003371 * against clearing.
3372 *
3373 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003374 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003375 *
3376 * RETURNS:
3377 * 1 if attached SCSI device exists, 0 otherwise.
3378 */
3379int ata_scsi_offline_dev(struct ata_device *dev)
3380{
3381 if (dev->sdev) {
3382 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3383 return 1;
3384 }
3385 return 0;
3386}
Tejun Heo580b21022006-05-31 18:28:05 +09003387
3388/**
3389 * ata_scsi_remove_dev - remove attached SCSI device
3390 * @dev: ATA device to remove attached SCSI device for
3391 *
3392 * This function is called from ata_eh_scsi_hotplug() and
3393 * responsible for removing the SCSI device attached to @dev.
3394 *
3395 * LOCKING:
3396 * Kernel thread context (may sleep).
3397 */
3398static void ata_scsi_remove_dev(struct ata_device *dev)
3399{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003400 struct ata_port *ap = dev->link->ap;
Tejun Heo580b21022006-05-31 18:28:05 +09003401 struct scsi_device *sdev;
3402 unsigned long flags;
3403
3404 /* Alas, we need to grab scan_mutex to ensure SCSI device
3405 * state doesn't change underneath us and thus
3406 * scsi_device_get() always succeeds. The mutex locking can
3407 * be removed if there is __scsi_device_get() interface which
3408 * increments reference counts regardless of device state.
3409 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003410 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003411 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b21022006-05-31 18:28:05 +09003412
Jeff Garzikcca39742006-08-24 03:19:22 -04003413 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b21022006-05-31 18:28:05 +09003414 sdev = dev->sdev;
3415 dev->sdev = NULL;
3416
3417 if (sdev) {
3418 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003419 * away underneath us after the host lock and
Tejun Heo580b21022006-05-31 18:28:05 +09003420 * scan_mutex are released. Hold onto it.
3421 */
3422 if (scsi_device_get(sdev) == 0) {
3423 /* The following ensures the attached sdev is
3424 * offline on return from ata_scsi_offline_dev()
3425 * regardless it wins or loses the race
3426 * against this function.
3427 */
3428 scsi_device_set_state(sdev, SDEV_OFFLINE);
3429 } else {
3430 WARN_ON(1);
3431 sdev = NULL;
3432 }
3433 }
3434
Jeff Garzikba6a1302006-06-22 23:46:10 -04003435 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003436 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003437
3438 if (sdev) {
3439 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
Kay Sieversb9d5fc42009-01-06 10:44:43 -08003440 dev_name(&sdev->sdev_gendev));
Tejun Heo580b21022006-05-31 18:28:05 +09003441
3442 scsi_remove_device(sdev);
3443 scsi_device_put(sdev);
3444 }
3445}
3446
Tejun Heo41bda9c2007-08-06 18:36:24 +09003447static void ata_scsi_handle_link_detach(struct ata_link *link)
3448{
3449 struct ata_port *ap = link->ap;
3450 struct ata_device *dev;
3451
Tejun Heo1eca4362008-11-03 20:03:17 +09003452 ata_for_each_dev(dev, link, ALL) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003453 unsigned long flags;
3454
3455 if (!(dev->flags & ATA_DFLAG_DETACHED))
3456 continue;
3457
3458 spin_lock_irqsave(ap->lock, flags);
3459 dev->flags &= ~ATA_DFLAG_DETACHED;
3460 spin_unlock_irqrestore(ap->lock, flags);
3461
3462 ata_scsi_remove_dev(dev);
3463 }
3464}
3465
Tejun Heo580b21022006-05-31 18:28:05 +09003466/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003467 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003468 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003469 *
3470 * Tell the block layer to send a media change notification
3471 * event.
3472 *
3473 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003474 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003475 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003476void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003477{
Tejun Heo854c73a2007-09-23 13:14:11 +09003478 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003479 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3480 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003481}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003482
3483/**
Tejun Heo580b21022006-05-31 18:28:05 +09003484 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003485 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b21022006-05-31 18:28:05 +09003486 *
3487 * Perform SCSI part of hotplug. It's executed from a separate
3488 * workqueue after EH completes. This is necessary because SCSI
3489 * hot plugging requires working EH and hot unplugging is
3490 * synchronized with hot plugging with a mutex.
3491 *
3492 * LOCKING:
3493 * Kernel thread context (may sleep).
3494 */
David Howells65f27f32006-11-22 14:55:48 +00003495void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b21022006-05-31 18:28:05 +09003496{
David Howells65f27f32006-11-22 14:55:48 +00003497 struct ata_port *ap =
3498 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003499 int i;
Tejun Heo580b21022006-05-31 18:28:05 +09003500
Tejun Heob51e9e52006-06-29 01:29:30 +09003501 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b21022006-05-31 18:28:05 +09003502 DPRINTK("ENTER/EXIT - unloading\n");
3503 return;
3504 }
3505
3506 DPRINTK("ENTER\n");
3507
Tejun Heo41bda9c2007-08-06 18:36:24 +09003508 /* Unplug detached devices. We cannot use link iterator here
3509 * because PMP links have to be scanned even if PMP is
3510 * currently not attached. Iterate manually.
3511 */
3512 ata_scsi_handle_link_detach(&ap->link);
3513 if (ap->pmp_link)
3514 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3515 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b21022006-05-31 18:28:05 +09003516
3517 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003518 ata_scsi_scan_host(ap, 0);
Tejun Heo580b21022006-05-31 18:28:05 +09003519
3520 DPRINTK("EXIT\n");
3521}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003522
3523/**
3524 * ata_scsi_user_scan - indication for user-initiated bus scan
3525 * @shost: SCSI host to scan
3526 * @channel: Channel to scan
3527 * @id: ID to scan
3528 * @lun: LUN to scan
3529 *
3530 * This function is called when user explicitly requests bus
3531 * scan. Set probe pending flag and invoke EH.
3532 *
3533 * LOCKING:
3534 * SCSI layer (we don't care)
3535 *
3536 * RETURNS:
3537 * Zero.
3538 */
3539static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3540 unsigned int id, unsigned int lun)
3541{
3542 struct ata_port *ap = ata_shost_to_port(shost);
3543 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003544 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003545
3546 if (!ap->ops->error_handler)
3547 return -EOPNOTSUPP;
3548
Tejun Heo41bda9c2007-08-06 18:36:24 +09003549 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003550 return -EINVAL;
3551
Tejun Heo071f44b2008-04-07 22:47:22 +09003552 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003553 if (channel != SCAN_WILD_CARD && channel)
3554 return -EINVAL;
3555 devno = id;
3556 } else {
3557 if (id != SCAN_WILD_CARD && id)
3558 return -EINVAL;
3559 devno = channel;
3560 }
3561
Jeff Garzikba6a1302006-06-22 23:46:10 -04003562 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003563
Tejun Heo41bda9c2007-08-06 18:36:24 +09003564 if (devno == SCAN_WILD_CARD) {
3565 struct ata_link *link;
3566
Tejun Heo1eca4362008-11-03 20:03:17 +09003567 ata_for_each_link(link, ap, EDGE) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003568 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003569 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003570 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003571 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003572 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003573 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003574
3575 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003576 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003577 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003578 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003579 } else
3580 rc = -EINVAL;
3581 }
3582
Tejun Heo309afcb2006-09-30 18:07:17 +09003583 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003584 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003585 spin_unlock_irqrestore(ap->lock, flags);
3586 ata_port_wait_eh(ap);
3587 } else
3588 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003589
3590 return rc;
3591}
zhao, forrest3057ac32006-06-12 12:01:34 +08003592
3593/**
Tejun Heod0171262006-06-12 22:51:14 +09003594 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003595 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003596 *
Tejun Heod0171262006-06-12 22:51:14 +09003597 * After ATA pass thru (SAT) commands are executed successfully,
3598 * libata need to propagate the changes to SCSI layer. This
3599 * function must be executed from ata_aux_wq such that sdev
3600 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003601 *
Tejun Heod0171262006-06-12 22:51:14 +09003602 * LOCKING:
3603 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003604 */
David Howells65f27f32006-11-22 14:55:48 +00003605void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003606{
David Howells65f27f32006-11-22 14:55:48 +00003607 struct ata_port *ap =
3608 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003609 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003610 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003611 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003612
Tejun Heof84e7e42006-11-22 11:21:31 +09003613 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003614
Tejun Heo1eca4362008-11-03 20:03:17 +09003615 ata_for_each_link(link, ap, EDGE) {
3616 ata_for_each_dev(dev, link, ENABLED) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003617 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003618
Tejun Heo1eca4362008-11-03 20:03:17 +09003619 if (!sdev)
Tejun Heo41bda9c2007-08-06 18:36:24 +09003620 continue;
3621 if (scsi_device_get(sdev))
3622 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003623
Tejun Heo41bda9c2007-08-06 18:36:24 +09003624 spin_unlock_irqrestore(ap->lock, flags);
3625 scsi_rescan_device(&(sdev->sdev_gendev));
3626 scsi_device_put(sdev);
3627 spin_lock_irqsave(ap->lock, flags);
3628 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003629 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003630
3631 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003632}
Brian King80289162006-08-07 14:27:31 -05003633
3634/**
3635 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003636 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003637 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003638 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003639 *
3640 * LOCKING:
3641 * PCI/etc. bus probe sem.
3642 *
3643 * RETURNS:
3644 * ata_port pointer on success / NULL on failure.
3645 */
3646
Jeff Garzikcca39742006-08-24 03:19:22 -04003647struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003648 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003649 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003650{
Tejun Heof3187192007-04-17 23:44:07 +09003651 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003652
Tejun Heof3187192007-04-17 23:44:07 +09003653 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003654 if (!ap)
3655 return NULL;
3656
Tejun Heof3187192007-04-17 23:44:07 +09003657 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003658 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003659 ap->pio_mask = port_info->pio_mask;
3660 ap->mwdma_mask = port_info->mwdma_mask;
3661 ap->udma_mask = port_info->udma_mask;
3662 ap->flags |= port_info->flags;
3663 ap->ops = port_info->port_ops;
3664 ap->cbl = ATA_CBL_SATA;
3665
Brian King80289162006-08-07 14:27:31 -05003666 return ap;
3667}
3668EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3669
3670/**
3671 * ata_sas_port_start - Set port up for dma.
3672 * @ap: Port to initialize
3673 *
3674 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003675 * initialized.
Brian King80289162006-08-07 14:27:31 -05003676 *
3677 * May be used as the port_start() entry in ata_port_operations.
3678 *
3679 * LOCKING:
3680 * Inherited from caller.
3681 */
3682int ata_sas_port_start(struct ata_port *ap)
3683{
James Bottomleydde20202008-02-19 11:36:56 +01003684 return 0;
Brian King80289162006-08-07 14:27:31 -05003685}
3686EXPORT_SYMBOL_GPL(ata_sas_port_start);
3687
3688/**
3689 * ata_port_stop - Undo ata_sas_port_start()
3690 * @ap: Port to shut down
3691 *
Brian King80289162006-08-07 14:27:31 -05003692 * May be used as the port_stop() entry in ata_port_operations.
3693 *
3694 * LOCKING:
3695 * Inherited from caller.
3696 */
3697
3698void ata_sas_port_stop(struct ata_port *ap)
3699{
Brian King80289162006-08-07 14:27:31 -05003700}
3701EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3702
3703/**
3704 * ata_sas_port_init - Initialize a SATA device
3705 * @ap: SATA port to initialize
3706 *
3707 * LOCKING:
3708 * PCI/etc. bus probe sem.
3709 *
3710 * RETURNS:
3711 * Zero on success, non-zero on error.
3712 */
3713
3714int ata_sas_port_init(struct ata_port *ap)
3715{
3716 int rc = ap->ops->port_start(ap);
3717
Tejun Heof3187192007-04-17 23:44:07 +09003718 if (!rc) {
3719 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003720 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003721 }
Brian King80289162006-08-07 14:27:31 -05003722
3723 return rc;
3724}
3725EXPORT_SYMBOL_GPL(ata_sas_port_init);
3726
3727/**
3728 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3729 * @ap: SATA port to destroy
3730 *
3731 */
3732
3733void ata_sas_port_destroy(struct ata_port *ap)
3734{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003735 if (ap->ops->port_stop)
3736 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003737 kfree(ap);
3738}
3739EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3740
3741/**
3742 * ata_sas_slave_configure - Default slave_config routine for libata devices
3743 * @sdev: SCSI device to configure
3744 * @ap: ATA port to which SCSI device is attached
3745 *
3746 * RETURNS:
3747 * Zero.
3748 */
3749
3750int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3751{
3752 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003753 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003754 return 0;
3755}
3756EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3757
3758/**
3759 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3760 * @cmd: SCSI command to be sent
3761 * @done: Completion function, called when command is complete
3762 * @ap: ATA port to which the command is being sent
3763 *
3764 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003765 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3766 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003767 */
3768
3769int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3770 struct ata_port *ap)
3771{
Brian King08475a12006-11-20 13:51:56 -06003772 int rc = 0;
3773
Brian King80289162006-08-07 14:27:31 -05003774 ata_scsi_dump_cdb(ap, cmd);
3775
Tejun Heo2486fa52008-07-31 07:52:40 +09003776 if (likely(ata_dev_enabled(ap->link.device)))
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003777 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003778 else {
3779 cmd->result = (DID_BAD_TARGET << 16);
3780 done(cmd);
3781 }
Brian King08475a12006-11-20 13:51:56 -06003782 return rc;
Brian King80289162006-08-07 14:27:31 -05003783}
3784EXPORT_SYMBOL_GPL(ata_sas_queuecmd);