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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50#include "libata.h"
51
Tejun Heo87340e92008-04-28 17:48:51 +090052#define SECTOR_SIZE 512
53#define ATA_SCSI_RBUF_SIZE 4096
54
55static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
56static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
Jeff Garzikb0955182005-05-12 15:45:22 -040057
Tejun Heoad706992006-12-17 10:45:57 +090058typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090059
Jeff Garzik2dcb4072007-10-19 06:42:56 -040060static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090061 const struct scsi_device *scsidev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -040062static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090063 const struct scsi_device *scsidev);
Tejun Heo83c47bc2006-05-31 18:28:07 +090064static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
65 unsigned int id, unsigned int lun);
Tejun Heoab5b3a52006-05-31 18:27:34 +090066
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040068#define RW_RECOVERY_MPAGE 0x1
69#define RW_RECOVERY_MPAGE_LEN 12
70#define CACHE_MPAGE 0x8
71#define CACHE_MPAGE_LEN 20
72#define CONTROL_MPAGE 0xa
73#define CONTROL_MPAGE_LEN 12
74#define ALL_MPAGES 0x3f
75#define ALL_SUB_MPAGES 0xff
76
77
Jeff Garzik24f75682007-09-21 07:54:49 -040078static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040079 RW_RECOVERY_MPAGE,
80 RW_RECOVERY_MPAGE_LEN - 2,
Jeff Garzik24f75682007-09-21 07:54:49 -040081 (1 << 7), /* AWRE */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040082 0, /* read retry count */
83 0, 0, 0, 0,
84 0, /* write retry count */
85 0, 0, 0
86};
87
88static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
89 CACHE_MPAGE,
90 CACHE_MPAGE_LEN - 2,
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0
95};
96
97static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
98 CONTROL_MPAGE,
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
104};
105
Tejun Heo30afc842006-03-18 18:40:14 +0900106/*
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
109 */
Tejun Heof3187192007-04-17 23:44:07 +0900110static struct scsi_transport_template ata_scsi_transport_template = {
Christoph Hellwig9227c332006-04-01 19:21:04 +0200111 .eh_strategy_handler = ata_scsi_error,
Tejun Heo30afc842006-03-18 18:40:14 +0900112 .eh_timed_out = ata_scsi_timed_out,
Tejun Heoccf68c32006-05-31 18:28:09 +0900113 .user_scan = ata_scsi_user_scan,
Tejun Heo30afc842006-03-18 18:40:14 +0900114};
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400117static const struct {
118 enum link_pm value;
119 const char *name;
120} link_pm_policy[] = {
121 { NOT_AVAILABLE, "max_performance" },
122 { MIN_POWER, "min_power" },
123 { MAX_PERFORMANCE, "max_performance" },
124 { MEDIUM_POWER, "medium_power" },
125};
126
Adrian Bunka2d6ed12007-10-31 00:50:23 +0100127static const char *ata_scsi_lpm_get(enum link_pm policy)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400128{
129 int i;
130
131 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
132 if (link_pm_policy[i].value == policy)
133 return link_pm_policy[i].name;
134
135 return NULL;
136}
137
Tony Jonesee959b02008-02-22 00:13:36 +0100138static ssize_t ata_scsi_lpm_put(struct device *dev,
139 struct device_attribute *attr,
140 const char *buf, size_t count)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400141{
Tony Jonesee959b02008-02-22 00:13:36 +0100142 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400143 struct ata_port *ap = ata_shost_to_port(shost);
144 enum link_pm policy = 0;
145 int i;
146
147 /*
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
153 */
154 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
155 const int len = strlen(link_pm_policy[i].name);
156 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
157 buf[len] == '\n') {
158 policy = link_pm_policy[i].value;
159 break;
160 }
161 }
162 if (!policy)
163 return -EINVAL;
164
165 ata_lpm_schedule(ap, policy);
166 return count;
167}
168
169static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100170ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400171{
Tony Jonesee959b02008-02-22 00:13:36 +0100172 struct Scsi_Host *shost = class_to_shost(dev);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400173 struct ata_port *ap = ata_shost_to_port(shost);
174 const char *policy =
175 ata_scsi_lpm_get(ap->pm_policy);
176
177 if (!policy)
178 return -EINVAL;
179
180 return snprintf(buf, 23, "%s\n", policy);
181}
Tony Jonesee959b02008-02-22 00:13:36 +0100182DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400183 ata_scsi_lpm_show, ata_scsi_lpm_put);
Tony Jonesee959b02008-02-22 00:13:36 +0100184EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400185
Tejun Heof0761be2008-04-28 17:16:52 +0900186static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
187{
188 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
189
190 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
191}
192
Kristen Carlson Accardi18f7ba42008-06-03 10:33:55 -0700193static ssize_t
194ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
195 const char *buf, size_t count)
196{
197 struct Scsi_Host *shost = class_to_shost(dev);
198 struct ata_port *ap = ata_shost_to_port(shost);
199 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
200 return ap->ops->em_store(ap, buf, count);
201 return -EINVAL;
202}
203
204static ssize_t
205ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
206 char *buf)
207{
208 struct Scsi_Host *shost = class_to_shost(dev);
209 struct ata_port *ap = ata_shost_to_port(shost);
210
211 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
212 return ap->ops->em_show(ap, buf);
213 return -EINVAL;
214}
215DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
216 ata_scsi_em_message_show, ata_scsi_em_message_store);
217EXPORT_SYMBOL_GPL(dev_attr_em_message);
218
219static ssize_t
220ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
221 char *buf)
222{
223 struct Scsi_Host *shost = class_to_shost(dev);
224 struct ata_port *ap = ata_shost_to_port(shost);
225
226 return snprintf(buf, 23, "%d\n", ap->em_message_type);
227}
228DEVICE_ATTR(em_message_type, S_IRUGO,
229 ata_scsi_em_message_type_show, NULL);
230EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
231
232static ssize_t
233ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
234 char *buf)
235{
236 struct scsi_device *sdev = to_scsi_device(dev);
237 struct ata_port *ap = ata_shost_to_port(sdev->host);
238 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
239
240 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
241 return ap->ops->sw_activity_show(atadev, buf);
242 return -EINVAL;
243}
244
245static ssize_t
246ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
247 const char *buf, size_t count)
248{
249 struct scsi_device *sdev = to_scsi_device(dev);
250 struct ata_port *ap = ata_shost_to_port(sdev->host);
251 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
252 enum sw_activity val;
253 int rc;
254
255 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
256 val = simple_strtoul(buf, NULL, 0);
257 switch (val) {
258 case OFF: case BLINK_ON: case BLINK_OFF:
259 rc = ap->ops->sw_activity_store(atadev, val);
260 if (!rc)
261 return count;
262 else
263 return rc;
264 }
265 }
266 return -EINVAL;
267}
268DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
269 ata_scsi_activity_store);
270EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
271
Douglas Gilbertae006512005-10-09 09:09:35 -0400272static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
273 void (*done)(struct scsi_cmnd *))
274{
275 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
276 /* "Invalid field in cbd" */
277 done(cmd);
278}
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280/**
281 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
282 * @sdev: SCSI device for which BIOS geometry is to be determined
283 * @bdev: block device associated with @sdev
284 * @capacity: capacity of SCSI device
285 * @geom: location to which geometry will be output
286 *
287 * Generic bios head/sector/cylinder calculator
288 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
289 * mapping. Some situations may arise where the disk is not
290 * bootable if this is not used.
291 *
292 * LOCKING:
293 * Defined by the SCSI layer. We don't really care.
294 *
295 * RETURNS:
296 * Zero.
297 */
298int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
299 sector_t capacity, int geom[])
300{
301 geom[0] = 255;
302 geom[1] = 63;
303 sector_div(capacity, 255*63);
304 geom[2] = capacity;
305
306 return 0;
307}
308
Jeff Garzikb0955182005-05-12 15:45:22 -0400309/**
Tejun Heo5924b742007-01-02 20:20:07 +0900310 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
311 * @sdev: SCSI device to get identify data for
312 * @arg: User buffer area for identify data
313 *
314 * LOCKING:
315 * Defined by the SCSI layer. We don't really care.
316 *
317 * RETURNS:
318 * Zero on success, negative errno on error.
319 */
320static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
321{
322 struct ata_port *ap = ata_shost_to_port(sdev->host);
323 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
324 u16 __user *dst = arg;
325 char buf[40];
326
327 if (!dev)
328 return -ENOMSG;
329
330 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
331 return -EFAULT;
332
333 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
334 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
335 return -EFAULT;
336
337 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
338 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
339 return -EFAULT;
340
341 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
342 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
343 return -EFAULT;
344
345 return 0;
346}
347
348/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400349 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800350 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400351 * @arg: User provided data for issuing command
352 *
353 * LOCKING:
354 * Defined by the SCSI layer. We don't really care.
355 *
356 * RETURNS:
357 * Zero on success, negative errno on error.
358 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400359int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
360{
361 int rc = 0;
362 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700363 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400364 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600365 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700366 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400367
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500368 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400369 return -EINVAL;
370
371 if (copy_from_user(args, arg, sizeof(args)))
372 return -EFAULT;
373
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700374 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
375 if (!sensebuf)
376 return -ENOMEM;
377
Jeff Garzikb0955182005-05-12 15:45:22 -0400378 memset(scsi_cmd, 0, sizeof(scsi_cmd));
379
380 if (args[3]) {
381 argsize = SECTOR_SIZE * args[3];
382 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400383 if (argbuf == NULL) {
384 rc = -ENOMEM;
385 goto error;
386 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400387
388 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
389 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400390 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600391 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400392 } else {
393 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700394 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600395 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400396 }
397
398 scsi_cmd[0] = ATA_16;
399
400 scsi_cmd[4] = args[2];
401 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
402 scsi_cmd[6] = args[3];
403 scsi_cmd[8] = args[1];
404 scsi_cmd[10] = 0x4f;
405 scsi_cmd[12] = 0xc2;
406 } else {
407 scsi_cmd[6] = args[1];
408 }
409 scsi_cmd[14] = args[0];
410
411 /* Good values for timeout and retries? Values below
412 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700413 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400414 sensebuf, (10*HZ), 5, 0);
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700415
416 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
417 u8 *desc = sensebuf + 8;
418 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
419
420 /* If we set cc then ATA pass-through will cause a
421 * check condition even if no error. Filter that. */
422 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
423 struct scsi_sense_hdr sshdr;
424 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400425 &sshdr);
426 if (sshdr.sense_key == 0 &&
427 sshdr.asc == 0 && sshdr.ascq == 0)
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700428 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
429 }
430
431 /* Send userspace a few ATA registers (same as drivers/ide) */
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400432 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
433 desc[0] == 0x09) { /* code is "ATA Descriptor" */
434 args[0] = desc[13]; /* status */
435 args[1] = desc[3]; /* error */
436 args[2] = desc[5]; /* sector count (0:7) */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700437 if (copy_to_user(arg, args, sizeof(args)))
438 rc = -EFAULT;
439 }
440 }
441
442
443 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400444 rc = -EIO;
445 goto error;
446 }
447
Jeff Garzikb0955182005-05-12 15:45:22 -0400448 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500449 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400450 rc = -EFAULT;
451error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700452 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700453 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400454 return rc;
455}
456
457/**
458 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800459 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400460 * @arg: User provided data for issuing command
461 *
462 * LOCKING:
463 * Defined by the SCSI layer. We don't really care.
464 *
465 * RETURNS:
466 * Zero on success, negative errno on error.
467 */
468int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
469{
470 int rc = 0;
471 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800472 u8 args[7], *sensebuf = NULL;
473 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400474
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500475 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400476 return -EINVAL;
477
478 if (copy_from_user(args, arg, sizeof(args)))
479 return -EFAULT;
480
David Milburnaf068bd2007-01-30 00:59:15 -0800481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
482 if (!sensebuf)
483 return -ENOMEM;
484
Jeff Garzikb0955182005-05-12 15:45:22 -0400485 memset(scsi_cmd, 0, sizeof(scsi_cmd));
486 scsi_cmd[0] = ATA_16;
487 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800488 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400489 scsi_cmd[4] = args[1];
490 scsi_cmd[6] = args[2];
491 scsi_cmd[8] = args[3];
492 scsi_cmd[10] = args[4];
493 scsi_cmd[12] = args[5];
Mark Lord277239f2007-03-30 17:45:52 -0400494 scsi_cmd[13] = args[6] & 0x4f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400495 scsi_cmd[14] = args[0];
496
Jeff Garzikb0955182005-05-12 15:45:22 -0400497 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500498 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800499 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
500 sensebuf, (10*HZ), 5, 0);
Jeff Garzikb0955182005-05-12 15:45:22 -0400501
David Milburnaf068bd2007-01-30 00:59:15 -0800502 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
503 u8 *desc = sensebuf + 8;
504 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
505
506 /* If we set cc then ATA pass-through will cause a
507 * check condition even if no error. Filter that. */
508 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
509 struct scsi_sense_hdr sshdr;
510 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
511 &sshdr);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400512 if (sshdr.sense_key == 0 &&
513 sshdr.asc == 0 && sshdr.ascq == 0)
David Milburnaf068bd2007-01-30 00:59:15 -0800514 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
515 }
516
517 /* Send userspace ATA registers */
518 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
519 desc[0] == 0x09) {/* code is "ATA Descriptor" */
520 args[0] = desc[13]; /* status */
521 args[1] = desc[3]; /* error */
522 args[2] = desc[5]; /* sector count (0:7) */
523 args[3] = desc[7]; /* lbal */
524 args[4] = desc[9]; /* lbam */
525 args[5] = desc[11]; /* lbah */
526 args[6] = desc[12]; /* select */
527 if (copy_to_user(arg, args, sizeof(args)))
528 rc = -EFAULT;
529 }
530 }
531
532 if (cmd_result) {
533 rc = -EIO;
534 goto error;
535 }
536
537 error:
538 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400539 return rc;
540}
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
543{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 int val = -EINVAL, rc = -EINVAL;
545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 switch (cmd) {
547 case ATA_IOC_GET_IO32:
548 val = 0;
549 if (copy_to_user(arg, &val, 1))
550 return -EFAULT;
551 return 0;
552
553 case ATA_IOC_SET_IO32:
554 val = (unsigned long) arg;
555 if (val != 0)
556 return -EINVAL;
557 return 0;
558
Tejun Heo5924b742007-01-02 20:20:07 +0900559 case HDIO_GET_IDENTITY:
560 return ata_get_identity(scsidev, arg);
561
Jeff Garzikb0955182005-05-12 15:45:22 -0400562 case HDIO_DRIVE_CMD:
563 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
564 return -EACCES;
565 return ata_cmd_ioctl(scsidev, arg);
566
567 case HDIO_DRIVE_TASK:
568 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
569 return -EACCES;
570 return ata_task_ioctl(scsidev, arg);
571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 default:
573 rc = -ENOTTY;
574 break;
575 }
576
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 return rc;
578}
579
580/**
581 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 * @dev: ATA device to which the new command is attached
583 * @cmd: SCSI command that originated this ATA command
584 * @done: SCSI command completion function
585 *
586 * Obtain a reference to an unused ata_queued_cmd structure,
587 * which is the basic libata structure representing a single
588 * ATA command sent to the hardware.
589 *
590 * If a command was available, fill in the SCSI-specific
591 * portions of the structure with information on the
592 * current command.
593 *
594 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400595 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 *
597 * RETURNS:
598 * Command allocated, or %NULL if none available.
599 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100600static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
601 struct scsi_cmnd *cmd,
602 void (*done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603{
604 struct ata_queued_cmd *qc;
605
Tejun Heo3373efd2006-05-15 20:57:53 +0900606 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 if (qc) {
608 qc->scsicmd = cmd;
609 qc->scsidone = done;
610
Tejun Heoff2aeb12007-12-05 16:43:11 +0900611 qc->sg = scsi_sglist(cmd);
Boaz Harrosh71201652007-09-18 17:48:50 +0200612 qc->n_elem = scsi_sg_count(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 } else {
614 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
615 done(cmd);
616 }
617
618 return qc;
619}
620
Tejun Heoaacda372008-03-18 17:47:43 +0900621static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
622{
623 struct scsi_cmnd *scmd = qc->scsicmd;
624
625 qc->extrabytes = scmd->request->extra_len;
626 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
627}
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400630 * ata_dump_status - user friendly display of error info
631 * @id: id of the port in question
632 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400634 * Decode and dump the ATA error/status registers for the user so
635 * that they have some idea what really happened at the non
636 * make-believe layer.
637 *
638 * LOCKING:
639 * inherited from caller
640 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100641static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400642{
643 u8 stat = tf->command, err = tf->feature;
644
645 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
646 if (stat & ATA_BUSY) {
647 printk("Busy }\n"); /* Data is not valid in this case */
648 } else {
649 if (stat & 0x40) printk("DriveReady ");
650 if (stat & 0x20) printk("DeviceFault ");
651 if (stat & 0x10) printk("SeekComplete ");
652 if (stat & 0x08) printk("DataRequest ");
653 if (stat & 0x04) printk("CorrectedError ");
654 if (stat & 0x02) printk("Index ");
655 if (stat & 0x01) printk("Error ");
656 printk("}\n");
657
658 if (err) {
659 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
660 if (err & 0x04) printk("DriveStatusError ");
661 if (err & 0x80) {
662 if (err & 0x04) printk("BadCRC ");
663 else printk("Sector ");
664 }
665 if (err & 0x40) printk("UncorrectableError ");
666 if (err & 0x10) printk("SectorIdNotFound ");
667 if (err & 0x02) printk("TrackZeroNotFound ");
668 if (err & 0x01) printk("AddrMarkNotFound ");
669 printk("}\n");
670 }
671 }
672}
673
674/**
675 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800676 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400677 * @drv_stat: value contained in ATA status register
678 * @drv_err: value contained in ATA error register
679 * @sk: the sense key we'll fill out
680 * @asc: the additional sense code we'll fill out
681 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900682 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400683 *
684 * Converts an ATA error into a SCSI error. Fill out pointers to
685 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
686 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 *
688 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400689 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100691static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
692 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693{
Jeff Garzikb0955182005-05-12 15:45:22 -0400694 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400695
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100697 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 /* BBD|ECC|ID|MAR */
699 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
700 /* BBD|ECC|ID */
701 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
702 /* ECC|MC|MARK */
703 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
704 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
705 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
706 /* MC|ID|ABRT|TRK0|MARK */
707 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
708 /* MCR|MARK */
709 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
710 /* Bad address mark */
711 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
712 /* TRK0 */
713 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
714 /* Abort & !ICRC */
715 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
716 /* Media change request */
717 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
718 /* SRV */
719 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
720 /* Media change */
721 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
722 /* ECC */
723 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
724 /* BBD - block marked bad */
725 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
726 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
727 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100728 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 /* Must be first because BUSY means no other bits valid */
730 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
731 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
732 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
733 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
734 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
735 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 /*
738 * Is this an error we can process/parse
739 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400740 if (drv_stat & ATA_BUSY) {
741 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
Jeff Garzikb0955182005-05-12 15:45:22 -0400744 if (drv_err) {
745 /* Look for drv_err */
746 for (i = 0; sense_table[i][0] != 0xFF; i++) {
747 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500748 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400749 sense_table[i][0]) {
750 *sk = sense_table[i][1];
751 *asc = sense_table[i][2];
752 *ascq = sense_table[i][3];
753 goto translate_done;
754 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400756 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900757 if (verbose)
758 printk(KERN_WARNING "ata%u: no sense translation for "
759 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 }
761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400763 for (i = 0; stat_table[i][0] != 0xFF; i++) {
764 if (stat_table[i][0] & drv_stat) {
765 *sk = stat_table[i][1];
766 *asc = stat_table[i][2];
767 *ascq = stat_table[i][3];
768 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400771 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900772 if (verbose)
773 printk(KERN_WARNING "ata%u: no sense translation for "
774 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Alan Cox2d202022006-03-21 15:53:46 +0000776 /* We need a sensible error return here, which is tricky, and one
777 that won't cause people to do things like return a disk wrongly */
778 *sk = ABORTED_COMMAND;
779 *asc = 0x00;
780 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400781
782 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900783 if (verbose)
784 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
785 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
786 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400787 return;
788}
789
790/*
Tejun Heo750426a2006-11-14 22:37:35 +0900791 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400792 * @qc: Command that completed.
793 *
794 * This function is specific to the ATA descriptor format sense
795 * block specified for the ATA pass through commands. Regardless
796 * of whether the command errored or not, return a sense
797 * block. Copy all controller registers into the sense
798 * block. Clear sense key, ASC & ASCQ if there is no error.
799 *
800 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900801 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400802 */
Tejun Heo750426a2006-11-14 22:37:35 +0900803static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400804{
805 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900806 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400807 unsigned char *sb = cmd->sense_buffer;
808 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900809 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400810
811 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
812
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400813 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400814
815 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400816 * Use ata_to_sense_error() to map status register bits
817 * onto sense key, asc & ascq.
818 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900819 if (qc->err_mask ||
820 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900821 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900822 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400823 sb[1] &= 0x0f;
824 }
825
826 /*
827 * Sense data is current and format is descriptor.
828 */
829 sb[0] = 0x72;
830
831 desc[0] = 0x09;
832
Tejun Heof38621b2006-11-14 22:37:35 +0900833 /* set length of additional sense data */
834 sb[7] = 14;
835 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400836
837 /*
838 * Copy registers into sense buffer.
839 */
840 desc[2] = 0x00;
841 desc[3] = tf->feature; /* == error reg */
842 desc[5] = tf->nsect;
843 desc[7] = tf->lbal;
844 desc[9] = tf->lbam;
845 desc[11] = tf->lbah;
846 desc[12] = tf->device;
847 desc[13] = tf->command; /* == status reg */
848
849 /*
850 * Fill in Extend bit, and the high order bytes
851 * if applicable.
852 */
853 if (tf->flags & ATA_TFLAG_LBA48) {
854 desc[2] |= 0x01;
855 desc[4] = tf->hob_nsect;
856 desc[6] = tf->hob_lbal;
857 desc[8] = tf->hob_lbam;
858 desc[10] = tf->hob_lbah;
859 }
860}
861
862/**
Tejun Heo750426a2006-11-14 22:37:35 +0900863 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -0400864 * @qc: Command that we are erroring out
865 *
Tejun Heod25614b2006-11-14 22:37:35 +0900866 * Generate sense block for a failed ATA command @qc. Descriptor
867 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -0400868 *
869 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900870 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400871 */
Tejun Heo750426a2006-11-14 22:37:35 +0900872static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400873{
Tejun Heod25614b2006-11-14 22:37:35 +0900874 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -0400875 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900876 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400877 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +0900878 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900879 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +0900880 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -0400881
882 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
883
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400884 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400885
Tejun Heod25614b2006-11-14 22:37:35 +0900886 /* sense data is current and format is descriptor */
887 sb[0] = 0x72;
888
889 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -0400890 * onto sense key, asc & ascq.
891 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900892 if (qc->err_mask ||
893 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900894 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +0900895 &sb[1], &sb[2], &sb[3], verbose);
896 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400897 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
Tejun Heod25614b2006-11-14 22:37:35 +0900899 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -0400900
Tejun Heod25614b2006-11-14 22:37:35 +0900901 /* information sense data descriptor */
902 sb[7] = 12;
903 desc[0] = 0x00;
904 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -0500905
Tejun Heod25614b2006-11-14 22:37:35 +0900906 desc[2] |= 0x80; /* valid */
907 desc[6] = block >> 40;
908 desc[7] = block >> 32;
909 desc[8] = block >> 24;
910 desc[9] = block >> 16;
911 desc[10] = block >> 8;
912 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913}
914
Brian Kinga6cce2a2006-03-17 17:04:15 -0600915static void ata_scsi_sdev_config(struct scsi_device *sdev)
916{
917 sdev->use_10_for_rw = 1;
918 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +0900919
920 /* Schedule policy is determined by ->qc_defer() callback and
921 * it needs to see every deferred qc. Set dev_blocked to 1 to
922 * prevent SCSI midlayer from automatically deferring
923 * requests.
924 */
925 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600926}
927
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100928/**
929 * atapi_drain_needed - Check whether data transfer may overflow
Randy Dunlap73fd8b62008-02-19 13:43:21 -0800930 * @rq: request to be checked
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100931 *
932 * ATAPI commands which transfer variable length data to host
933 * might overflow due to application error or hardare bug. This
934 * function checks whether overflow should be drained and ignored
935 * for @request.
936 *
937 * LOCKING:
938 * None.
939 *
940 * RETURNS:
941 * 1 if ; otherwise, 0.
942 */
943static int atapi_drain_needed(struct request *rq)
944{
945 if (likely(!blk_pc_request(rq)))
946 return 0;
947
948 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
949 return 0;
950
951 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
952}
953
954static int ata_scsi_dev_config(struct scsi_device *sdev,
955 struct ata_device *dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -0600956{
Tejun Heo914ed352006-11-01 18:39:55 +0900957 /* configure max sectors */
958 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -0600959
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100960 if (dev->class == ATA_DEV_ATAPI) {
961 struct request_queue *q = sdev->request_queue;
962 void *buf;
963
Tejun Heoe3790c72008-03-04 11:18:17 +0100964 /* set the min alignment and padding */
James Bottomleyd0ad3bc2008-01-22 13:43:48 -0600965 blk_queue_update_dma_alignment(sdev->request_queue,
966 ATA_DMA_PAD_SZ - 1);
FUJITA Tomonori27f82212008-07-04 09:30:03 +0200967 blk_queue_update_dma_pad(sdev->request_queue,
968 ATA_DMA_PAD_SZ - 1);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100969
970 /* configure draining */
971 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
972 if (!buf) {
973 ata_dev_printk(dev, KERN_ERR,
974 "drain buffer allocation failed\n");
975 return -ENOMEM;
976 }
977
978 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
979 } else {
James Bottomleyd0ad3bc2008-01-22 13:43:48 -0600980 /* ATA devices must be sector aligned */
981 blk_queue_update_dma_alignment(sdev->request_queue,
982 ATA_SECT_SIZE - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +0900983 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +0100984 }
Tejun Heod8cf5382008-01-15 08:46:59 +0900985
Jeff Garzikf26792d2007-10-29 17:18:39 -0400986 if (dev->flags & ATA_DFLAG_AN)
987 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
988
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900989 if (dev->flags & ATA_DFLAG_NCQ) {
990 int depth;
991
992 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
993 depth = min(ATA_MAX_QUEUE - 1, depth);
994 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
995 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100996
997 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600998}
999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000/**
1001 * ata_scsi_slave_config - Set SCSI device attributes
1002 * @sdev: SCSI device to examine
1003 *
1004 * This is called before we actually start reading
1005 * and writing to the device, to configure certain
1006 * SCSI mid-layer behaviors.
1007 *
1008 * LOCKING:
1009 * Defined by SCSI layer. We don't really care.
1010 */
1011
1012int ata_scsi_slave_config(struct scsi_device *sdev)
1013{
Tejun Heo31534362006-05-31 18:27:36 +09001014 struct ata_port *ap = ata_shost_to_port(sdev->host);
1015 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001016 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +09001017
Brian Kinga6cce2a2006-03-17 17:04:15 -06001018 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
Tejun Heo31534362006-05-31 18:27:36 +09001020 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001021 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001023 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024}
1025
1026/**
Tejun Heo83c47bc2006-05-31 18:28:07 +09001027 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1028 * @sdev: SCSI device to be destroyed
1029 *
1030 * @sdev is about to be destroyed for hot/warm unplugging. If
1031 * this unplugging was initiated by libata as indicated by NULL
1032 * dev->sdev, this function doesn't have to do anything.
1033 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1034 * Clear dev->sdev, schedule the device for ATA detach and invoke
1035 * EH.
1036 *
1037 * LOCKING:
1038 * Defined by SCSI layer. We don't really care.
1039 */
1040void ata_scsi_slave_destroy(struct scsi_device *sdev)
1041{
1042 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001043 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001044 unsigned long flags;
1045 struct ata_device *dev;
1046
1047 if (!ap->ops->error_handler)
1048 return;
1049
Jeff Garzikba6a1302006-06-22 23:46:10 -04001050 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09001051 dev = __ata_scsi_find_dev(ap, sdev);
1052 if (dev && dev->sdev) {
1053 /* SCSI device already in CANCEL state, no need to offline it */
1054 dev->sdev = NULL;
1055 dev->flags |= ATA_DFLAG_DETACH;
1056 ata_port_schedule_eh(ap);
1057 }
Jeff Garzikba6a1302006-06-22 23:46:10 -04001058 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +01001059
1060 kfree(q->dma_drain_buffer);
1061 q->dma_drain_buffer = NULL;
1062 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09001063}
1064
1065/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001066 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1067 * @sdev: SCSI device to configure queue depth for
1068 * @queue_depth: new queue depth
1069 *
1070 * This is libata standard hostt->change_queue_depth callback.
1071 * SCSI will call into this callback when user tries to set queue
1072 * depth via sysfs.
1073 *
1074 * LOCKING:
1075 * SCSI layer (we don't care)
1076 *
1077 * RETURNS:
1078 * Newly configured queue depth.
1079 */
1080int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1081{
1082 struct ata_port *ap = ata_shost_to_port(sdev->host);
1083 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001084 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001085
Tejun Heoc3c70c42007-02-20 23:31:22 +09001086 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001087 return sdev->queue_depth;
1088
1089 dev = ata_scsi_find_dev(ap, sdev);
1090 if (!dev || !ata_dev_enabled(dev))
1091 return sdev->queue_depth;
1092
Tejun Heoc3c70c42007-02-20 23:31:22 +09001093 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001094 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001095 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1096 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001097 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001098 queue_depth = 1;
1099 }
Tejun Heo360f6542006-09-30 19:45:00 +09001100 spin_unlock_irqrestore(ap->lock, flags);
1101
Tejun Heoc3c70c42007-02-20 23:31:22 +09001102 /* limit and apply queue depth */
1103 queue_depth = min(queue_depth, sdev->host->can_queue);
1104 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1105 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1106
1107 if (sdev->queue_depth == queue_depth)
1108 return -EINVAL;
1109
1110 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001111 return queue_depth;
1112}
1113
Tejun Heod9aca222007-05-17 16:43:26 +02001114/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001115static void ata_delayed_done_timerfn(unsigned long arg)
1116{
1117 struct scsi_cmnd *scmd = (void *)arg;
1118
1119 scmd->scsi_done(scmd);
1120}
1121
Tejun Heod9aca222007-05-17 16:43:26 +02001122/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001123static void ata_delayed_done(struct scsi_cmnd *scmd)
1124{
1125 static struct timer_list timer;
1126
1127 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1128 mod_timer(&timer, jiffies + 5 * HZ);
1129}
1130
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001131/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001132 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1133 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001134 *
1135 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1136 * (to start). Perhaps these commands should be preceded by
1137 * CHECK POWER MODE to see what power mode the device is already in.
1138 * [See SAT revision 5 at www.t10.org]
1139 *
1140 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001141 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001142 *
1143 * RETURNS:
1144 * Zero on success, non-zero on error.
1145 */
Tejun Heoad706992006-12-17 10:45:57 +09001146static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001147{
Tejun Heo542b1442006-12-17 10:45:08 +09001148 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001149 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001150 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001151
Tejun Heo2e5704f2006-12-17 10:46:33 +09001152 if (scmd->cmd_len < 5)
1153 goto invalid_fld;
1154
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001155 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1156 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001157 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001158 ; /* ignore IMMED bit, violates sat-r05 */
1159 }
Tejun Heo542b1442006-12-17 10:45:08 +09001160 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001161 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001162 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001163 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001164
Tejun Heo542b1442006-12-17 10:45:08 +09001165 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001166 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001167
1168 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001169 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001170
1171 tf->lbah = 0x0;
1172 tf->lbam = 0x0;
1173 tf->lbal = 0x0;
1174 tf->device |= ATA_LBA;
1175 } else {
1176 /* CHS */
1177 tf->lbal = 0x1; /* sect */
1178 tf->lbam = 0x0; /* cyl low */
1179 tf->lbah = 0x0; /* cyl high */
1180 }
1181
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001182 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001183 } else {
1184 /* XXX: This is for backward compatibility, will be
1185 * removed. Read Documentation/feature-removal-schedule.txt
1186 * for more info.
1187 */
Tejun Heod9aca222007-05-17 16:43:26 +02001188 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
Tejun Heo920a4b12007-05-04 21:28:48 +02001189 (system_state == SYSTEM_HALT ||
1190 system_state == SYSTEM_POWER_OFF)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001191 static unsigned long warned;
Tejun Heo920a4b12007-05-04 21:28:48 +02001192
Tejun Heoda071b42007-05-14 17:26:18 +02001193 if (!test_and_set_bit(0, &warned)) {
Tejun Heo920a4b12007-05-04 21:28:48 +02001194 ata_dev_printk(qc->dev, KERN_WARNING,
1195 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1196 "UPDATE SHUTDOWN UTILITY\n");
1197 ata_dev_printk(qc->dev, KERN_WARNING,
1198 "For more info, visit "
1199 "http://linux-ata.org/shutdown.html\n");
Tejun Heoda071b42007-05-14 17:26:18 +02001200
1201 /* ->scsi_done is not used, use it for
1202 * delayed completion.
1203 */
1204 scmd->scsi_done = qc->scsidone;
1205 qc->scsidone = ata_delayed_done;
Tejun Heo920a4b12007-05-04 21:28:48 +02001206 }
1207 scmd->result = SAM_STAT_GOOD;
1208 return 1;
1209 }
1210
Robert Hancock78981a72007-01-30 00:59:18 -08001211 /* Issue ATA STANDBY IMMEDIATE command */
1212 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001213 }
Robert Hancock78981a72007-01-30 00:59:18 -08001214
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001215 /*
1216 * Standby and Idle condition timers could be implemented but that
1217 * would require libata to implement the Power condition mode page
1218 * and allow the user to change it. Changing mode pages requires
1219 * MODE SELECT to be implemented.
1220 */
1221
1222 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001223
1224invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001225 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001226 /* "Invalid field in cbd" */
1227 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001228}
1229
1230
1231/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1233 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 *
1235 * Sets up an ATA taskfile to issue FLUSH CACHE or
1236 * FLUSH CACHE EXT.
1237 *
1238 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001239 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 *
1241 * RETURNS:
1242 * Zero on success, non-zero on error.
1243 */
Tejun Heoad706992006-12-17 10:45:57 +09001244static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245{
1246 struct ata_taskfile *tf = &qc->tf;
1247
1248 tf->flags |= ATA_TFLAG_DEVICE;
1249 tf->protocol = ATA_PROT_NODATA;
1250
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001251 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 tf->command = ATA_CMD_FLUSH_EXT;
1253 else
1254 tf->command = ATA_CMD_FLUSH;
1255
Tejun Heob666da32007-10-26 15:53:59 +09001256 /* flush is critical for IO integrity, consider it an IO command */
1257 qc->flags |= ATA_QCFLAG_IO;
1258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 return 0;
1260}
1261
1262/**
Albert Lee3aef5232005-10-04 08:47:43 -04001263 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001264 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001265 *
1266 * Calculate LBA and transfer length for 6-byte commands.
1267 *
1268 * RETURNS:
1269 * @plba: the LBA
1270 * @plen: the transfer length
1271 */
Tejun Heo542b1442006-12-17 10:45:08 +09001272static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001273{
1274 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001275 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001276
1277 VPRINTK("six-byte command\n");
1278
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001279 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001280 lba |= ((u64)cdb[2]) << 8;
1281 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001282
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001283 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001284
1285 *plba = lba;
1286 *plen = len;
1287}
1288
1289/**
1290 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001291 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001292 *
1293 * Calculate LBA and transfer length for 10-byte commands.
1294 *
1295 * RETURNS:
1296 * @plba: the LBA
1297 * @plen: the transfer length
1298 */
Tejun Heo542b1442006-12-17 10:45:08 +09001299static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001300{
1301 u64 lba = 0;
1302 u32 len = 0;
1303
1304 VPRINTK("ten-byte command\n");
1305
Tejun Heo542b1442006-12-17 10:45:08 +09001306 lba |= ((u64)cdb[2]) << 24;
1307 lba |= ((u64)cdb[3]) << 16;
1308 lba |= ((u64)cdb[4]) << 8;
1309 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001310
Tejun Heo542b1442006-12-17 10:45:08 +09001311 len |= ((u32)cdb[7]) << 8;
1312 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001313
1314 *plba = lba;
1315 *plen = len;
1316}
1317
1318/**
1319 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001320 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001321 *
1322 * Calculate LBA and transfer length for 16-byte commands.
1323 *
1324 * RETURNS:
1325 * @plba: the LBA
1326 * @plen: the transfer length
1327 */
Tejun Heo542b1442006-12-17 10:45:08 +09001328static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001329{
1330 u64 lba = 0;
1331 u32 len = 0;
1332
1333 VPRINTK("sixteen-byte command\n");
1334
Tejun Heo542b1442006-12-17 10:45:08 +09001335 lba |= ((u64)cdb[2]) << 56;
1336 lba |= ((u64)cdb[3]) << 48;
1337 lba |= ((u64)cdb[4]) << 40;
1338 lba |= ((u64)cdb[5]) << 32;
1339 lba |= ((u64)cdb[6]) << 24;
1340 lba |= ((u64)cdb[7]) << 16;
1341 lba |= ((u64)cdb[8]) << 8;
1342 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001343
Tejun Heo542b1442006-12-17 10:45:08 +09001344 len |= ((u32)cdb[10]) << 24;
1345 len |= ((u32)cdb[11]) << 16;
1346 len |= ((u32)cdb[12]) << 8;
1347 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001348
1349 *plba = lba;
1350 *plen = len;
1351}
1352
1353/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1355 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 *
1357 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1358 *
1359 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001360 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 *
1362 * RETURNS:
1363 * Zero on success, non-zero on error.
1364 */
Tejun Heoad706992006-12-17 10:45:57 +09001365static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366{
Tejun Heo542b1442006-12-17 10:45:08 +09001367 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001369 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001371 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001372 u64 block;
1373 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
1375 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1376 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Tejun Heo2e5704f2006-12-17 10:46:33 +09001378 if (cdb[0] == VERIFY) {
1379 if (scmd->cmd_len < 10)
1380 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001381 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001382 } else if (cdb[0] == VERIFY_16) {
1383 if (scmd->cmd_len < 16)
1384 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001385 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001386 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001387 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388
Albert Lee8bf62ece2005-05-12 15:29:42 -04001389 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001390 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001391 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001392 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001393 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001394 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
Albert Lee07506692005-10-12 15:04:18 +08001396 if (dev->flags & ATA_DFLAG_LBA) {
1397 tf->flags |= ATA_TFLAG_LBA;
1398
Albert Leec6a33e22005-10-12 15:12:26 +08001399 if (lba_28_ok(block, n_block)) {
1400 /* use LBA28 */
1401 tf->command = ATA_CMD_VERIFY;
1402 tf->device |= (block >> 24) & 0xf;
1403 } else if (lba_48_ok(block, n_block)) {
1404 if (!(dev->flags & ATA_DFLAG_LBA48))
1405 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001406
1407 /* use LBA48 */
1408 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001409 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Albert Lee8bf62ece2005-05-12 15:29:42 -04001411 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Albert Lee8bf62ece2005-05-12 15:29:42 -04001413 tf->hob_lbah = (block >> 40) & 0xff;
1414 tf->hob_lbam = (block >> 32) & 0xff;
1415 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001416 } else
1417 /* request too large even for LBA48 */
1418 goto out_of_range;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001419
1420 tf->nsect = n_block & 0xff;
1421
1422 tf->lbah = (block >> 16) & 0xff;
1423 tf->lbam = (block >> 8) & 0xff;
1424 tf->lbal = block & 0xff;
1425
1426 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001428 /* CHS */
1429 u32 sect, head, cyl, track;
1430
Albert Leec6a33e22005-10-12 15:12:26 +08001431 if (!lba_28_ok(block, n_block))
1432 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001433
Albert Lee8bf62ece2005-05-12 15:29:42 -04001434 /* Convert LBA to CHS */
1435 track = (u32)block / dev->sectors;
1436 cyl = track / dev->heads;
1437 head = track % dev->heads;
1438 sect = (u32)block % dev->sectors + 1;
1439
Albert Leec187c4b2005-10-04 08:46:51 -04001440 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1441 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001442
1443 /* Check whether the converted CHS can fit.
1444 Cylinder: 0-65535
Albert Lee8bf62ece2005-05-12 15:29:42 -04001445 Head: 0-15
1446 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001447 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001448 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001449
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001451 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1452 tf->lbal = sect;
1453 tf->lbam = cyl;
1454 tf->lbah = cyl >> 8;
1455 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 }
1457
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001459
1460invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001461 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001462 /* "Invalid field in cbd" */
1463 return 1;
1464
1465out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001466 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001467 /* "Logical Block Address out of range" */
1468 return 1;
1469
1470nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001471 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001472 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473}
1474
1475/**
1476 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1477 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 *
1479 * Converts any of six SCSI read/write commands into the
1480 * ATA counterpart, including starting sector (LBA),
1481 * sector count, and taking into account the device's LBA48
1482 * support.
1483 *
1484 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1485 * %WRITE_16 are currently supported.
1486 *
1487 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001488 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 *
1490 * RETURNS:
1491 * Zero on success, non-zero on error.
1492 */
Tejun Heoad706992006-12-17 10:45:57 +09001493static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494{
Tejun Heo542b1442006-12-17 10:45:08 +09001495 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001496 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001497 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001498 u64 block;
1499 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001500 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501
Tejun Heo542b1442006-12-17 10:45:08 +09001502 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001503 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001505 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001506 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001507 case READ_10:
1508 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001509 if (unlikely(scmd->cmd_len < 10))
1510 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001511 scsi_10_lba_len(cdb, &block, &n_block);
1512 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001513 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001514 break;
1515 case READ_6:
1516 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001517 if (unlikely(scmd->cmd_len < 6))
1518 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001519 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001520
1521 /* for 6-byte r/w commands, transfer length 0
1522 * means 256 blocks of data, not 0 block.
1523 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001524 if (!n_block)
1525 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001526 break;
1527 case READ_16:
1528 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001529 if (unlikely(scmd->cmd_len < 16))
1530 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001531 scsi_16_lba_len(cdb, &block, &n_block);
1532 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001533 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001534 break;
1535 default:
Albert Lee8bf62ece2005-05-12 15:29:42 -04001536 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001537 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 }
1539
Albert Lee8bf62ece2005-05-12 15:29:42 -04001540 /* Check and compose ATA command */
1541 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001542 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1543 * length 0 means transfer 0 block of data.
1544 * However, for ATA R/W commands, sector count 0 means
1545 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001546 *
1547 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001548 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001549 goto nothing_to_do;
Albert Lee8bf62ece2005-05-12 15:29:42 -04001550
Tejun Heobd056d72006-11-14 22:47:10 +09001551 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001552 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001553
Tejun Heobd056d72006-11-14 22:47:10 +09001554 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1555 qc->tag);
1556 if (likely(rc == 0))
1557 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001558
Tejun Heobd056d72006-11-14 22:47:10 +09001559 if (rc == -ERANGE)
1560 goto out_of_range;
1561 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001562invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001563 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001564 /* "Invalid field in cbd" */
1565 return 1;
1566
1567out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001568 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001569 /* "Logical Block Address out of range" */
1570 return 1;
1571
1572nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001573 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001574 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575}
1576
Tejun Heo77853bf2006-01-23 13:09:36 +09001577static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578{
Tejun Heoc31f5712006-11-22 12:39:43 +09001579 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001581 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001582 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583
Jeff Garzikb0955182005-05-12 15:45:22 -04001584 /* For ATA pass thru (SAT) commands, generate a sense block if
1585 * user mandated it or if there's an error. Note that if we
1586 * generate because the user forced us to, a check condition
1587 * is generated and the ATA register values are returned
1588 * whether the command completed successfully or not. If there
1589 * was no error, SK, ASC and ASCQ will all be zero.
1590 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001591 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001592 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001593 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001594 } else {
1595 if (!need_sense) {
1596 cmd->result = SAM_STAT_GOOD;
1597 } else {
1598 /* TODO: decide which descriptor format to use
1599 * for 48b LBA devices and call that here
1600 * instead of the fixed desc, which is only
1601 * good for smaller LBA (and maybe CHS?)
1602 * devices.
1603 */
Tejun Heo750426a2006-11-14 22:37:35 +09001604 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001605 }
1606 }
1607
Tejun Heod9aca222007-05-17 16:43:26 +02001608 /* XXX: track spindown state for spindown skipping and warning */
Tejun Heo13b8d092007-05-15 12:29:22 +02001609 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1610 qc->tf.command == ATA_CMD_STANDBYNOW1))
1611 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1612 else if (likely(system_state != SYSTEM_HALT &&
1613 system_state != SYSTEM_POWER_OFF))
1614 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1615
Tejun Heoc31f5712006-11-22 12:39:43 +09001616 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001617 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618
1619 qc->scsidone(cmd);
1620
Tejun Heo77853bf2006-01-23 13:09:36 +09001621 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622}
1623
1624/**
1625 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 * @dev: ATA device to which the command is addressed
1627 * @cmd: SCSI command to execute
1628 * @done: SCSI command completion function
1629 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1630 *
1631 * Our ->queuecommand() function has decided that the SCSI
1632 * command issued can be directly translated into an ATA
1633 * command, rather than handled internally.
1634 *
1635 * This function sets up an ata_queued_cmd structure for the
1636 * SCSI command, and sends that ata_queued_cmd to the hardware.
1637 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001638 * The xlat_func argument (actor) returns 0 if ready to execute
1639 * ATA command, else 1 to finish translation. If 1 is returned
1640 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1641 * to be set reflecting an error condition or clean (early)
1642 * termination.
1643 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001645 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001646 *
1647 * RETURNS:
1648 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1649 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001651static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1652 void (*done)(struct scsi_cmnd *),
1653 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001655 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001657 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
1659 VPRINTK("ENTER\n");
1660
Tejun Heo3373efd2006-05-15 20:57:53 +09001661 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001663 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664
1665 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001666 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1667 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001668 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001669 ata_dev_printk(dev, KERN_WARNING,
1670 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001671 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 }
1673
Boaz Harrosh71201652007-09-18 17:48:50 +02001674 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
1676 qc->dma_dir = cmd->sc_data_direction;
1677 }
1678
1679 qc->complete_fn = ata_scsi_qc_complete;
1680
Tejun Heoad706992006-12-17 10:45:57 +09001681 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001682 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
Tejun Heo31cc23b2007-09-23 13:14:12 +09001684 if (ap->ops->qc_defer) {
1685 if ((rc = ap->ops->qc_defer(qc)))
1686 goto defer;
1687 }
1688
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001690 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691
1692 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001693 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694
Douglas Gilbertae006512005-10-09 09:09:35 -04001695early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001696 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001697 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001698 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001699 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001700
1701err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001703 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001704 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001705err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001706 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001707 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001708
1709defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001710 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001711 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001712 if (rc == ATA_DEFER_LINK)
1713 return SCSI_MLQUEUE_DEVICE_BUSY;
1714 else
1715 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716}
1717
1718/**
1719 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001720 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001721 * @flags: unsigned long variable to store irq enable status
1722 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 *
Tejun Heo87340e92008-04-28 17:48:51 +09001724 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 *
1726 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001727 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 *
1729 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001730 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 */
Tejun Heo87340e92008-04-28 17:48:51 +09001732static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1733 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734{
Tejun Heo87340e92008-04-28 17:48:51 +09001735 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736
Tejun Heo87340e92008-04-28 17:48:51 +09001737 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1738 if (copy_in)
1739 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1740 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1741 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742}
1743
1744/**
1745 * ata_scsi_rbuf_put - Unmap response buffer.
1746 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001747 * @copy_out: copy out result
1748 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 *
Tejun Heo87340e92008-04-28 17:48:51 +09001750 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1751 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 *
1753 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001754 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 */
Tejun Heo87340e92008-04-28 17:48:51 +09001756static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1757 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758{
Tejun Heo87340e92008-04-28 17:48:51 +09001759 if (copy_out)
1760 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1761 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1762 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763}
1764
1765/**
1766 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1767 * @args: device IDENTIFY data / SCSI command of interest.
1768 * @actor: Callback hook for desired SCSI command simulator
1769 *
1770 * Takes care of the hard work of simulating a SCSI command...
1771 * Mapping the response buffer, calling the command's handler,
1772 * and handling the handler's return value. This return value
1773 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001774 * completed successfully (0), or not (in which case cmd->result
1775 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 *
1777 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001778 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 */
Tejun Heof0761be2008-04-28 17:16:52 +09001780static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001781 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782{
1783 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001784 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001786 unsigned long flags;
1787
Tejun Heo87340e92008-04-28 17:48:51 +09001788 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1789 rc = actor(args, rbuf);
1790 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001791
Douglas Gilbertae006512005-10-09 09:09:35 -04001792 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001794 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795}
1796
1797/**
1798 * ata_scsiop_inq_std - Simulate INQUIRY command
1799 * @args: device IDENTIFY data / SCSI command of interest.
1800 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 *
1802 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001803 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 *
1805 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001806 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 */
Tejun Heo87340e92008-04-28 17:48:51 +09001808static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809{
Tejun Heo87340e92008-04-28 17:48:51 +09001810 const u8 versions[] = {
1811 0x60, /* SAM-3 (no version claimed) */
1812
1813 0x03,
1814 0x20, /* SBC-2 (no version claimed) */
1815
1816 0x02,
1817 0x60 /* SPC-3 (no version claimed) */
1818 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819 u8 hdr[] = {
1820 TYPE_DISK,
1821 0,
1822 0x5, /* claim SPC-3 version compatibility */
1823 2,
1824 95 - 4
1825 };
1826
Tejun Heo87340e92008-04-28 17:48:51 +09001827 VPRINTK("ENTER\n");
1828
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 /* set scsi removeable (RMB) bit per ata bit */
1830 if (ata_id_removeable(args->id))
1831 hdr[1] |= (1 << 7);
1832
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001834 memcpy(&rbuf[8], "ATA ", 8);
1835 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1836 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837
Tejun Heo87340e92008-04-28 17:48:51 +09001838 if (rbuf[32] == 0 || rbuf[32] == ' ')
1839 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840
Tejun Heo87340e92008-04-28 17:48:51 +09001841 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842
1843 return 0;
1844}
1845
1846/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001847 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 * @args: device IDENTIFY data / SCSI command of interest.
1849 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001851 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 *
1853 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001854 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 */
Tejun Heo87340e92008-04-28 17:48:51 +09001856static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857{
1858 const u8 pages[] = {
1859 0x00, /* page 0x00, this page */
1860 0x80, /* page 0x80, unit serial no page */
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001861 0x83, /* page 0x83, device ident page */
1862 0x89, /* page 0x89, ata info page */
1863 0xb1, /* page 0xb1, block device characteristics page */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 };
Tejun Heo87340e92008-04-28 17:48:51 +09001865
Jeff Garzikb142eb62006-03-21 20:37:47 -05001866 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09001867 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 return 0;
1869}
1870
1871/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001872 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 * @args: device IDENTIFY data / SCSI command of interest.
1874 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 *
1876 * Returns ATA device serial number.
1877 *
1878 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001879 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 */
Tejun Heo87340e92008-04-28 17:48:51 +09001881static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882{
1883 const u8 hdr[] = {
1884 0,
1885 0x80, /* this page code */
1886 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001887 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 };
Tejun Heo87340e92008-04-28 17:48:51 +09001889
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001891 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1892 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 return 0;
1894}
1895
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001897 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 * @args: device IDENTIFY data / SCSI command of interest.
1899 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001901 * Yields two logical unit device identification designators:
1902 * - vendor specific ASCII containing the ATA serial number
1903 * - SAT defined "t10 vendor id based" containing ASCII vendor
1904 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 *
1906 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001907 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 */
Tejun Heo87340e92008-04-28 17:48:51 +09001909static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910{
Jeff Garzikb142eb62006-03-21 20:37:47 -05001911 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09001912 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001913
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05001915 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916
Tejun Heo87340e92008-04-28 17:48:51 +09001917 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1918 rbuf[num + 0] = 2;
1919 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1920 num += 4;
1921 ata_id_string(args->id, (unsigned char *) rbuf + num,
1922 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1923 num += ATA_ID_SERNO_LEN;
1924
1925 /* SAT defined lu model and serial numbers descriptor */
1926 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1927 rbuf[num + 0] = 2;
1928 rbuf[num + 1] = 1;
1929 rbuf[num + 3] = sat_model_serial_desc_len;
1930 num += 4;
1931 memcpy(rbuf + num, "ATA ", 8);
1932 num += 8;
1933 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1934 ATA_ID_PROD_LEN);
1935 num += ATA_ID_PROD_LEN;
1936 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1937 ATA_ID_SERNO_LEN);
1938 num += ATA_ID_SERNO_LEN;
1939
Jeff Garzikb142eb62006-03-21 20:37:47 -05001940 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 return 0;
1942}
1943
1944/**
Jeff Garzikad355b42007-09-21 20:38:03 -04001945 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1946 * @args: device IDENTIFY data / SCSI command of interest.
1947 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04001948 *
1949 * Yields SAT-specified ATA VPD page.
1950 *
1951 * LOCKING:
1952 * spin_lock_irqsave(host lock)
1953 */
Tejun Heo87340e92008-04-28 17:48:51 +09001954static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04001955{
Jeff Garzikad355b42007-09-21 20:38:03 -04001956 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04001957
Jeff Garzikad355b42007-09-21 20:38:03 -04001958 memset(&tf, 0, sizeof(tf));
1959
Tejun Heo87340e92008-04-28 17:48:51 +09001960 rbuf[1] = 0x89; /* our page code */
1961 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1962 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04001963
Tejun Heo87340e92008-04-28 17:48:51 +09001964 memcpy(&rbuf[8], "linux ", 8);
1965 memcpy(&rbuf[16], "libata ", 16);
1966 memcpy(&rbuf[32], DRV_VERSION, 4);
1967 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04001968
1969 /* we don't store the ATA device signature, so we fake it */
1970
1971 tf.command = ATA_DRDY; /* really, this is Status reg */
1972 tf.lbal = 0x1;
1973 tf.nsect = 0x1;
1974
Tejun Heo87340e92008-04-28 17:48:51 +09001975 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
1976 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04001977
Tejun Heo87340e92008-04-28 17:48:51 +09001978 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04001979
Tejun Heo87340e92008-04-28 17:48:51 +09001980 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04001981 return 0;
1982}
1983
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06001984static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
1985{
1986 rbuf[1] = 0xb1;
1987 rbuf[3] = 0x3c;
1988 if (ata_id_major_version(args->id) > 7) {
1989 rbuf[4] = args->id[217] >> 8;
1990 rbuf[5] = args->id[217];
1991 rbuf[7] = args->id[168] & 0xf;
1992 }
1993
1994 return 0;
1995}
1996
Jeff Garzikad355b42007-09-21 20:38:03 -04001997/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001998 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 * @args: device IDENTIFY data / SCSI command of interest.
2000 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001 *
2002 * No operation. Simply returns success to caller, to indicate
2003 * that the caller should successfully complete this SCSI command.
2004 *
2005 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002006 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 */
Tejun Heo87340e92008-04-28 17:48:51 +09002008static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009{
2010 VPRINTK("ENTER\n");
2011 return 0;
2012}
2013
2014/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 * ata_msense_caching - Simulate MODE SENSE caching info page
2016 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09002017 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 *
2019 * Generate a caching info page, which conditionally indicates
2020 * write caching to the SCSI layer, depending on device
2021 * capabilities.
2022 *
2023 * LOCKING:
2024 * None.
2025 */
Tejun Heo87340e92008-04-28 17:48:51 +09002026static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027{
Tejun Heo87340e92008-04-28 17:48:51 +09002028 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002030 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09002032 buf[12] |= (1 << 5); /* disable read ahead */
2033 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034}
2035
2036/**
2037 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09002038 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 *
2040 * Generate a generic MODE SENSE control mode page.
2041 *
2042 * LOCKING:
2043 * None.
2044 */
Tejun Heo87340e92008-04-28 17:48:51 +09002045static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046{
Tejun Heo87340e92008-04-28 17:48:51 +09002047 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002048 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049}
2050
2051/**
2052 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07002053 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 *
2055 * Generate a generic MODE SENSE r/w error recovery page.
2056 *
2057 * LOCKING:
2058 * None.
2059 */
Tejun Heo87340e92008-04-28 17:48:51 +09002060static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061{
Tejun Heo87340e92008-04-28 17:48:51 +09002062 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002063 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064}
2065
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002066/*
2067 * We can turn this into a real blacklist if it's needed, for now just
2068 * blacklist any Maxtor BANC1G10 revision firmware
2069 */
2070static int ata_dev_supports_fua(u16 *id)
2071{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002072 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002073
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002074 if (!libata_fua)
2075 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002076 if (!ata_id_has_fua(id))
2077 return 0;
2078
Tejun Heoa0cf7332007-01-02 20:18:49 +09002079 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2080 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002081
Tejun Heo2e026712006-02-12 22:47:04 +09002082 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002083 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002084 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002085 return 1;
2086
2087 return 0; /* blacklisted */
2088}
2089
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090/**
2091 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2092 * @args: device IDENTIFY data / SCSI command of interest.
2093 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002095 * Simulate MODE SENSE commands. Assume this is invoked for direct
2096 * access devices (e.g. disks) only. There should be no block
2097 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098 *
2099 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002100 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 */
Tejun Heo87340e92008-04-28 17:48:51 +09002102static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002104 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002105 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002106 const u8 sat_blk_desc[] = {
2107 0, 0, 0, 0, /* number of blocks: sat unspecified */
2108 0,
2109 0, 0x2, 0x0 /* block length: 512 bytes */
2110 };
2111 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002112 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002113 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114
2115 VPRINTK("ENTER\n");
2116
2117 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002118 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2119 /*
2120 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002122
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002124 switch (page_control) {
2125 case 0: /* current */
2126 break; /* supported */
2127 case 3: /* saved */
2128 goto saving_not_supp;
2129 case 1: /* changeable */
2130 case 2: /* defaults */
2131 default:
2132 goto invalid_fld;
2133 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134
Tejun Heo87340e92008-04-28 17:48:51 +09002135 if (six_byte)
2136 p += 4 + (ebd ? 8 : 0);
2137 else
2138 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002140 pg = scsicmd[2] & 0x3f;
2141 spg = scsicmd[3];
2142 /*
2143 * No mode subpages supported (yet) but asking for _all_
2144 * subpages may be valid
2145 */
2146 if (spg && (spg != ALL_SUB_MPAGES))
2147 goto invalid_fld;
2148
2149 switch(pg) {
2150 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002151 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 break;
2153
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002154 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002155 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 break;
2157
Tejun Heo87340e92008-04-28 17:48:51 +09002158 case CONTROL_MPAGE:
2159 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002162 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002163 p += ata_msense_rw_recovery(p);
2164 p += ata_msense_caching(args->id, p);
2165 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 break;
2167
2168 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002169 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 }
2171
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002172 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002173 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002174 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2175 dpofua = 1 << 4;
2176
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002178 rbuf[0] = p - rbuf - 1;
2179 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002180 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002181 rbuf[3] = sizeof(sat_blk_desc);
2182 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002183 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002185 unsigned int output_len = p - rbuf - 2;
2186
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002188 rbuf[1] = output_len;
2189 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002190 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002191 rbuf[7] = sizeof(sat_blk_desc);
2192 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002196
2197invalid_fld:
2198 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2199 /* "Invalid field in cbd" */
2200 return 1;
2201
2202saving_not_supp:
2203 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2204 /* "Saving parameters not supported" */
2205 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206}
2207
2208/**
2209 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2210 * @args: device IDENTIFY data / SCSI command of interest.
2211 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 *
2213 * Simulate READ CAPACITY commands.
2214 *
2215 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002216 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 */
Tejun Heo87340e92008-04-28 17:48:51 +09002218static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219{
Tejun Heo6a362612006-11-20 11:15:47 +09002220 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
2222 VPRINTK("ENTER\n");
2223
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002225 if (last_lba >= 0xffffffffULL)
2226 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002227
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002229 rbuf[0] = last_lba >> (8 * 3);
2230 rbuf[1] = last_lba >> (8 * 2);
2231 rbuf[2] = last_lba >> (8 * 1);
2232 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233
2234 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002235 rbuf[6] = ATA_SECT_SIZE >> 8;
2236 rbuf[7] = ATA_SECT_SIZE & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237 } else {
2238 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002239 rbuf[0] = last_lba >> (8 * 7);
2240 rbuf[1] = last_lba >> (8 * 6);
2241 rbuf[2] = last_lba >> (8 * 5);
2242 rbuf[3] = last_lba >> (8 * 4);
2243 rbuf[4] = last_lba >> (8 * 3);
2244 rbuf[5] = last_lba >> (8 * 2);
2245 rbuf[6] = last_lba >> (8 * 1);
2246 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247
2248 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002249 rbuf[10] = ATA_SECT_SIZE >> 8;
2250 rbuf[11] = ATA_SECT_SIZE & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 }
2252
2253 return 0;
2254}
2255
2256/**
2257 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2258 * @args: device IDENTIFY data / SCSI command of interest.
2259 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260 *
2261 * Simulate REPORT LUNS command.
2262 *
2263 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002264 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 */
Tejun Heo87340e92008-04-28 17:48:51 +09002266static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267{
2268 VPRINTK("ENTER\n");
2269 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2270
2271 return 0;
2272}
2273
Tejun Heo77853bf2006-01-23 13:09:36 +09002274static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002275{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002276 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002277 /* FIXME: not quite right; we don't want the
2278 * translation of taskfile registers into
2279 * a sense descriptors, since that's only
2280 * correct for ATA, not ATAPI
2281 */
Tejun Heo750426a2006-11-14 22:37:35 +09002282 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002283 }
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002284
2285 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002286 ata_qc_free(qc);
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002287}
2288
2289/* is it pointless to prefer PIO for "safety reasons"? */
2290static inline int ata_pio_use_silly(struct ata_port *ap)
2291{
2292 return (ap->flags & ATA_FLAG_PIO_DMA);
2293}
2294
2295static void atapi_request_sense(struct ata_queued_cmd *qc)
2296{
2297 struct ata_port *ap = qc->ap;
2298 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002299
2300 DPRINTK("ATAPI request sense\n");
2301
Jeff Garzika939c962005-10-05 17:09:16 -04002302 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002303 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002304
Tejun Heo127102a2008-04-07 22:47:21 +09002305#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002306 if (ap->ops->sff_tf_read)
2307 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002308#endif
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002309
2310 /* fill these in, for the case where they are -not- overwritten */
2311 cmd->sense_buffer[0] = 0x70;
2312 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2313
2314 ata_qc_reinit(qc);
2315
Tejun Heo93f8fec2007-12-05 16:43:01 +09002316 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002317 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002318 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002319 qc->dma_dir = DMA_FROM_DEVICE;
2320
Tejun Heo6e7846e2006-02-12 23:32:58 +09002321 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002322 qc->cdb[0] = REQUEST_SENSE;
2323 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2324
2325 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2326 qc->tf.command = ATA_CMD_PACKET;
2327
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002328 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002329 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002330 qc->tf.feature |= ATAPI_PKT_DMA;
2331 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002332 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002333 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2334 qc->tf.lbah = 0;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002335 }
Jeff Garzika939c962005-10-05 17:09:16 -04002336 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2337
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002338 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002339
Tejun Heo8e0e6942006-03-31 20:41:11 +09002340 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002341
2342 DPRINTK("EXIT\n");
2343}
2344
Tejun Heo77853bf2006-01-23 13:09:36 +09002345static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346{
2347 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002348 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349
Jeff Garzika7dac442005-10-30 04:44:42 -05002350 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002351
Tejun Heo246619d2006-05-15 20:58:16 +09002352 /* handle completion from new EH */
2353 if (unlikely(qc->ap->ops->error_handler &&
2354 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2355
2356 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2357 /* FIXME: not quite right; we don't want the
2358 * translation of taskfile registers into a
2359 * sense descriptors, since that's only
2360 * correct for ATA, not ATAPI
2361 */
Tejun Heo750426a2006-11-14 22:37:35 +09002362 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002363 }
2364
Tejun Heo22aac082006-08-08 14:08:59 +09002365 /* SCSI EH automatically locks door if sdev->locked is
2366 * set. Sometimes door lock request continues to
2367 * fail, for example, when no media is present. This
2368 * creates a loop - SCSI EH issues door lock which
2369 * fails and gets invoked again to acquire sense data
2370 * for the failed command.
2371 *
2372 * If door lock fails, always clear sdev->locked to
2373 * avoid this infinite loop.
2374 */
2375 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2376 qc->dev->sdev->locked = 0;
2377
Tejun Heo246619d2006-05-15 20:58:16 +09002378 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2379 qc->scsidone(cmd);
2380 ata_qc_free(qc);
2381 return;
2382 }
2383
2384 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002385 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e6662005-11-14 14:50:05 -05002387 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002388 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002389 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002390 /* FIXME: not quite right; we don't want the
2391 * translation of taskfile registers into
2392 * a sense descriptors, since that's only
2393 * correct for ATA, not ATAPI
2394 */
Tejun Heo750426a2006-11-14 22:37:35 +09002395 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002396 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397 u8 *scsicmd = cmd->cmnd;
2398
Tony Battersbyfd71da42005-12-21 16:35:44 -05002399 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002400 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002401 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002402
Tejun Heo87340e92008-04-28 17:48:51 +09002403 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002404
2405 /* ATAPI devices typically report zero for their SCSI version,
2406 * and sometimes deviate from the spec WRT response data
2407 * format. If SCSI version is reported as zero like normal,
2408 * then we make the following fixups: 1) Fake MMC-5 version,
2409 * to indicate to the Linux scsi midlayer this is a modern
2410 * device. 2) Ensure response data format / ATAPI information
2411 * are always correct.
2412 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002413 if (buf[2] == 0) {
2414 buf[2] = 0x5;
2415 buf[3] = 0x32;
2416 }
2417
Tejun Heo87340e92008-04-28 17:48:51 +09002418 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002420
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421 cmd->result = SAM_STAT_GOOD;
2422 }
2423
2424 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002425 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426}
2427/**
2428 * atapi_xlat - Initialize PACKET taskfile
2429 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 *
2431 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002432 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 *
2434 * RETURNS:
2435 * Zero on success, non-zero on failure.
2436 */
Tejun Heoad706992006-12-17 10:45:57 +09002437static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438{
Tejun Heo542b1442006-12-17 10:45:08 +09002439 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002441 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002442 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002443 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444
Tejun Heo2e5704f2006-12-17 10:46:33 +09002445 memset(qc->cdb, 0, dev->cdb_len);
2446 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447
2448 qc->complete_fn = atapi_qc_complete;
2449
2450 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002451 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452 qc->tf.flags |= ATA_TFLAG_WRITE;
2453 DPRINTK("direction: write\n");
2454 }
2455
2456 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002457 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002459 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002460 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002461 using_pio = 1;
2462
Tejun Heoe1902222007-11-26 20:58:02 +09002463 /* Some controller variants snoop this value for Packet
2464 * transfers to do state machine and FIFO management. Thus we
2465 * want to set it properly, and for DMA where it is
2466 * effectively meaningless.
2467 */
Tejun Heoaacda372008-03-18 17:47:43 +09002468 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002469
Tejun Heoe1902222007-11-26 20:58:02 +09002470 /* Most ATAPI devices which honor transfer chunk size don't
2471 * behave according to the spec when odd chunk size which
2472 * matches the transfer length is specified. If the number of
2473 * bytes to transfer is 2n+1. According to the spec, what
2474 * should happen is to indicate that 2n+1 is going to be
2475 * transferred and transfer 2n+2 bytes where the last byte is
2476 * padding.
2477 *
2478 * In practice, this doesn't happen. ATAPI devices first
2479 * indicate and transfer 2n bytes and then indicate and
2480 * transfer 2 bytes where the last byte is padding.
2481 *
2482 * This inconsistency confuses several controllers which
2483 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2484 * These controllers use actual number of transferred bytes to
2485 * update DMA poitner and transfer of 4n+2 bytes make those
2486 * controller push DMA pointer by 4n+4 bytes because SATA data
2487 * FISes are aligned to 4 bytes. This causes data corruption
2488 * and buffer overrun.
2489 *
2490 * Always setting nbytes to even number solves this problem
2491 * because then ATAPI devices don't have to split data at 2n
2492 * boundaries.
2493 */
2494 if (nbytes & 0x1)
2495 nbytes++;
2496
Alan Cox2db78dd2007-10-02 13:53:04 -07002497 qc->tf.lbam = (nbytes & 0xFF);
2498 qc->tf.lbah = (nbytes >> 8);
2499
Tejun Heo5895ef92008-06-17 12:36:26 +09002500 if (nodata)
2501 qc->tf.protocol = ATAPI_PROT_NODATA;
2502 else if (using_pio)
2503 qc->tf.protocol = ATAPI_PROT_PIO;
2504 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002505 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002506 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507 qc->tf.feature |= ATAPI_PKT_DMA;
2508
Tejun Heo91163002008-02-21 13:25:50 +09002509 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2510 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002511 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 }
2514
Alan Cox2db78dd2007-10-02 13:53:04 -07002515
2516 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2517 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518 return 0;
2519}
2520
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002521static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002522{
Tejun Heo071f44b2008-04-07 22:47:22 +09002523 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002524 if (likely(devno < ata_link_max_devices(&ap->link)))
2525 return &ap->link.device[devno];
2526 } else {
2527 if (likely(devno < ap->nr_pmp_links))
2528 return &ap->pmp_link[devno].device[0];
2529 }
2530
Tejun Heoab5b3a52006-05-31 18:27:34 +09002531 return NULL;
2532}
2533
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002534static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2535 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002536{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002537 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002538
Tejun Heo41bda9c2007-08-06 18:36:24 +09002539 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002540 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002541 if (unlikely(scsidev->channel || scsidev->lun))
2542 return NULL;
2543 devno = scsidev->id;
2544 } else {
2545 if (unlikely(scsidev->id || scsidev->lun))
2546 return NULL;
2547 devno = scsidev->channel;
2548 }
2549
2550 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002551}
2552
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553/**
2554 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2555 * @ap: ATA port to which the device is attached
2556 * @scsidev: SCSI device from which we derive the ATA device
2557 *
2558 * Given various information provided in struct scsi_cmnd,
2559 * map that onto an ATA bus, and using that mapping
2560 * determine which ata_device is associated with the
2561 * SCSI command to be sent.
2562 *
2563 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002564 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 *
2566 * RETURNS:
2567 * Associated ATA device, or %NULL if not found.
2568 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002569static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002570ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002572 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573
Tejun Heo2486fa52008-07-31 07:52:40 +09002574 if (unlikely(!dev || !ata_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 return NULL;
2576
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577 return dev;
2578}
2579
Jeff Garzikb0955182005-05-12 15:45:22 -04002580/*
2581 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2582 * @byte1: Byte 1 from pass-thru CDB.
2583 *
2584 * RETURNS:
2585 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2586 */
2587static u8
2588ata_scsi_map_proto(u8 byte1)
2589{
2590 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002591 case 3: /* Non-data */
2592 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002593
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002594 case 6: /* DMA */
2595 case 10: /* UDMA Data-in */
2596 case 11: /* UDMA Data-Out */
2597 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002598
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002599 case 4: /* PIO Data-in */
2600 case 5: /* PIO Data-out */
2601 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002602
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002603 case 0: /* Hard Reset */
2604 case 1: /* SRST */
2605 case 8: /* Device Diagnostic */
2606 case 9: /* Device Reset */
2607 case 7: /* DMA Queued */
2608 case 12: /* FPDMA */
2609 case 15: /* Return Response Info */
2610 default: /* Reserved */
2611 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002612 }
2613
2614 return ATA_PROT_UNKNOWN;
2615}
2616
2617/**
2618 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2619 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002620 *
2621 * Handles either 12 or 16-byte versions of the CDB.
2622 *
2623 * RETURNS:
2624 * Zero on success, non-zero on failure.
2625 */
Tejun Heoad706992006-12-17 10:45:57 +09002626static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002627{
2628 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002629 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002630 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002631 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002632
Tejun Heo542b1442006-12-17 10:45:08 +09002633 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002634 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002635
Alan Coxae8d4ee2007-11-04 22:05:49 -05002636 /*
2637 * Filter TPM commands by default. These provide an
2638 * essentially uncontrolled encrypted "back door" between
2639 * applications and the disk. Set libata.allow_tpm=1 if you
2640 * have a real reason for wanting to use them. This ensures
2641 * that installed software cannot easily mess stuff up without
2642 * user intent. DVR type users will probably ship with this enabled
2643 * for movie content management.
2644 *
2645 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2646 * for this and should do in future but that it is not sufficient as
2647 * DCS is an optional feature set. Thus we also do the software filter
2648 * so that we comply with the TC consortium stated goal that the user
2649 * can turn off TC features of their system.
2650 */
2651 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2652 goto invalid_fld;
2653
Alan Coxf79d4092006-05-22 16:55:11 +01002654 /* We may not issue DMA commands if no DMA mode is set */
2655 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2656 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002657
2658 /*
2659 * 12 and 16 byte CDBs use different offsets to
2660 * provide the various register values.
2661 */
Tejun Heo542b1442006-12-17 10:45:08 +09002662 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002663 /*
2664 * 16-byte CDB - may contain extended commands.
2665 *
2666 * If that is the case, copy the upper byte register values.
2667 */
Tejun Heo542b1442006-12-17 10:45:08 +09002668 if (cdb[1] & 0x01) {
2669 tf->hob_feature = cdb[3];
2670 tf->hob_nsect = cdb[5];
2671 tf->hob_lbal = cdb[7];
2672 tf->hob_lbam = cdb[9];
2673 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002674 tf->flags |= ATA_TFLAG_LBA48;
2675 } else
2676 tf->flags &= ~ATA_TFLAG_LBA48;
2677
2678 /*
2679 * Always copy low byte, device and command registers.
2680 */
Tejun Heo542b1442006-12-17 10:45:08 +09002681 tf->feature = cdb[4];
2682 tf->nsect = cdb[6];
2683 tf->lbal = cdb[8];
2684 tf->lbam = cdb[10];
2685 tf->lbah = cdb[12];
2686 tf->device = cdb[13];
2687 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002688 } else {
2689 /*
2690 * 12-byte CDB - incapable of extended commands.
2691 */
2692 tf->flags &= ~ATA_TFLAG_LBA48;
2693
Tejun Heo542b1442006-12-17 10:45:08 +09002694 tf->feature = cdb[3];
2695 tf->nsect = cdb[4];
2696 tf->lbal = cdb[5];
2697 tf->lbam = cdb[6];
2698 tf->lbah = cdb[7];
2699 tf->device = cdb[8];
2700 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002701 }
Albert Leefa4453c2007-06-07 15:52:07 +08002702
2703 /* enforce correct master/slave bit */
2704 tf->device = dev->devno ?
2705 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002706
Albert Lee1dce5892007-06-07 15:49:22 +08002707 /* sanity check for pio multi commands */
2708 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2709 goto invalid_fld;
2710
2711 if (is_multi_taskfile(tf)) {
2712 unsigned int multi_count = 1 << (cdb[1] >> 5);
2713
2714 /* compare the passed through multi_count
2715 * with the cached multi_count of libata
2716 */
2717 if (multi_count != dev->multi_count)
2718 ata_dev_printk(dev, KERN_WARNING,
2719 "invalid multi_count %u ignored\n",
2720 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002721 }
Albert Lee1dce5892007-06-07 15:49:22 +08002722
Mark Lord5a5dbd12007-03-16 10:22:26 -04002723 /* READ/WRITE LONG use a non-standard sect_size */
2724 qc->sect_size = ATA_SECT_SIZE;
2725 switch (tf->command) {
2726 case ATA_CMD_READ_LONG:
2727 case ATA_CMD_READ_LONG_ONCE:
2728 case ATA_CMD_WRITE_LONG:
2729 case ATA_CMD_WRITE_LONG_ONCE:
2730 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2731 goto invalid_fld;
Boaz Harrosh71201652007-09-18 17:48:50 +02002732 qc->sect_size = scsi_bufflen(scmd);
Mark Lord5a5dbd12007-03-16 10:22:26 -04002733 }
2734
Jeff Garzikb0955182005-05-12 15:45:22 -04002735 /*
2736 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2737 * SET_FEATURES - XFER MODE must be preceded/succeeded
2738 * by an update to hardware-specific registers for each
2739 * controller (i.e. the reason for ->set_piomode(),
2740 * ->set_dmamode(), and ->post_set_mode() hooks).
2741 */
2742 if ((tf->command == ATA_CMD_SET_FEATURES)
2743 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002744 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002745
2746 /*
2747 * Set flags so that all registers will be written,
2748 * and pass on write indication (used for PIO/DMA
2749 * setup.)
2750 */
2751 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2752
Tejun Heo542b1442006-12-17 10:45:08 +09002753 if (scmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002754 tf->flags |= ATA_TFLAG_WRITE;
2755
2756 /*
2757 * Set transfer length.
2758 *
2759 * TODO: find out if we need to do more here to
2760 * cover scatter/gather case.
2761 */
Tejun Heoaacda372008-03-18 17:47:43 +09002762 ata_qc_set_pc_nbytes(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04002763
Tejun Heoe027bd32007-10-26 16:19:26 +09002764 /* request result TF and be quiet about device error */
2765 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
Tejun Heoe61e0672006-05-15 20:57:40 +09002766
Jeff Garzikb0955182005-05-12 15:45:22 -04002767 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002768
2769 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002770 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002771 /* "Invalid field in cdb" */
2772 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002773}
2774
Linus Torvalds1da177e2005-04-16 15:20:36 -07002775/**
2776 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2777 * @dev: ATA device
2778 * @cmd: SCSI command opcode to consider
2779 *
2780 * Look up the SCSI command given, and determine whether the
2781 * SCSI command is to be translated or simulated.
2782 *
2783 * RETURNS:
2784 * Pointer to translation function if possible, %NULL if not.
2785 */
2786
2787static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2788{
2789 switch (cmd) {
2790 case READ_6:
2791 case READ_10:
2792 case READ_16:
2793
2794 case WRITE_6:
2795 case WRITE_10:
2796 case WRITE_16:
2797 return ata_scsi_rw_xlat;
2798
2799 case SYNCHRONIZE_CACHE:
2800 if (ata_try_flush_cache(dev))
2801 return ata_scsi_flush_xlat;
2802 break;
2803
2804 case VERIFY:
2805 case VERIFY_16:
2806 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002807
2808 case ATA_12:
2809 case ATA_16:
2810 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002811
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002812 case START_STOP:
2813 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814 }
2815
2816 return NULL;
2817}
2818
2819/**
2820 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2821 * @ap: ATA port to which the command was being sent
2822 * @cmd: SCSI command to dump
2823 *
2824 * Prints the contents of a SCSI command via printk().
2825 */
2826
2827static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2828 struct scsi_cmnd *cmd)
2829{
2830#ifdef ATA_DEBUG
2831 struct scsi_device *scsidev = cmd->device;
2832 u8 *scsicmd = cmd->cmnd;
2833
2834 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09002835 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002836 scsidev->channel, scsidev->id, scsidev->lun,
2837 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2838 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2839 scsicmd[8]);
2840#endif
2841}
2842
Tejun Heo542b1442006-12-17 10:45:08 +09002843static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09002844 void (*done)(struct scsi_cmnd *),
2845 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06002846{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002847 u8 scsi_op = scmd->cmnd[0];
2848 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09002849 int rc = 0;
2850
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002851 if (dev->class == ATA_DEV_ATA) {
2852 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2853 goto bad_cdb_len;
2854
2855 xlat_func = ata_get_xlat_func(dev, scsi_op);
2856 } else {
2857 if (unlikely(!scmd->cmd_len))
2858 goto bad_cdb_len;
2859
2860 xlat_func = NULL;
2861 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2862 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09002863 int len = COMMAND_SIZE(scsi_op);
2864 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002865 goto bad_cdb_len;
2866
2867 xlat_func = atapi_xlat;
2868 } else {
2869 /* ATA_16 passthru, treat as an ATA command */
2870 if (unlikely(scmd->cmd_len > 16))
2871 goto bad_cdb_len;
2872
2873 xlat_func = ata_get_xlat_func(dev, scsi_op);
2874 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09002875 }
2876
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002877 if (xlat_func)
2878 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2879 else
2880 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09002881
2882 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002883
2884 bad_cdb_len:
2885 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2886 scmd->cmd_len, scsi_op, dev->cdb_len);
2887 scmd->result = DID_ERROR << 16;
2888 done(scmd);
2889 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06002890}
2891
Linus Torvalds1da177e2005-04-16 15:20:36 -07002892/**
2893 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2894 * @cmd: SCSI command to be sent
2895 * @done: Completion function, called when command is complete
2896 *
2897 * In some cases, this function translates SCSI commands into
2898 * ATA taskfiles, and queues the taskfiles to be sent to
2899 * hardware. In other cases, this function simulates a
2900 * SCSI device by evaluating and responding to certain
2901 * SCSI commands. This creates the overall effect of
2902 * ATA and ATAPI devices appearing as SCSI devices.
2903 *
2904 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002905 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906 *
2907 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09002908 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2909 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002911int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2912{
2913 struct ata_port *ap;
2914 struct ata_device *dev;
2915 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05002916 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09002917 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002918
Jeff Garzik35bb94b2006-04-11 13:12:34 -04002919 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002920
2921 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04002922 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002923
2924 ata_scsi_dump_cdb(ap, cmd);
2925
2926 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002927 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09002928 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002929 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002930 cmd->result = (DID_BAD_TARGET << 16);
2931 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002932 }
2933
Jeff Garzikba6a1302006-06-22 23:46:10 -04002934 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002935 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09002936 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002937}
2938
2939/**
2940 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002941 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942 * @cmd: SCSI command being sent to device.
2943 * @done: SCSI command completion function.
2944 *
2945 * Interprets and directly executes a select list of SCSI commands
2946 * that can be handled internally.
2947 *
2948 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002949 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950 */
2951
Tejun Heo3373efd2006-05-15 20:57:53 +09002952void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953 void (*done)(struct scsi_cmnd *))
2954{
2955 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04002956 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04002957 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002958
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002959 args.dev = dev;
2960 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961 args.cmd = cmd;
2962 args.done = done;
2963
2964 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002965 /* TODO: worth improving? */
2966 case FORMAT_UNIT:
2967 ata_scsi_invalid_field(cmd, done);
2968 break;
2969
2970 case INQUIRY:
2971 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04002972 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002973 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2974 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2975 else switch (scsicmd[2]) {
2976 case 0x00:
2977 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002978 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002979 case 0x80:
2980 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002981 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002982 case 0x83:
2983 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002984 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002985 case 0x89:
2986 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987 break;
Matthew Wilcox1e9dbc92008-06-19 13:13:38 -06002988 case 0xb1:
2989 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
2990 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002992 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002993 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002994 }
2995 break;
2996
2997 case MODE_SENSE:
2998 case MODE_SENSE_10:
2999 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3000 break;
3001
3002 case MODE_SELECT: /* unconditionally return */
3003 case MODE_SELECT_10: /* bad-field-in-cdb */
3004 ata_scsi_invalid_field(cmd, done);
3005 break;
3006
3007 case READ_CAPACITY:
3008 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3009 break;
3010
3011 case SERVICE_ACTION_IN:
3012 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3013 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3014 else
3015 ata_scsi_invalid_field(cmd, done);
3016 break;
3017
3018 case REPORT_LUNS:
3019 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3020 break;
3021
3022 case REQUEST_SENSE:
3023 ata_scsi_set_sense(cmd, 0, 0, 0);
3024 cmd->result = (DRIVER_SENSE << 24);
3025 done(cmd);
3026 break;
3027
3028 /* if we reach this, then writeback caching is disabled,
3029 * turning this into a no-op.
3030 */
3031 case SYNCHRONIZE_CACHE:
3032 /* fall through */
3033
3034 /* no-op's, complete with success */
3035 case REZERO_UNIT:
3036 case SEEK_6:
3037 case SEEK_10:
3038 case TEST_UNIT_READY:
3039 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3040 break;
3041
3042 case SEND_DIAGNOSTIC:
3043 tmp8 = scsicmd[1] & ~(1 << 3);
3044 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3045 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3046 else
3047 ata_scsi_invalid_field(cmd, done);
3048 break;
3049
3050 /* all other commands */
3051 default:
3052 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3053 /* "Invalid command operation code" */
3054 done(cmd);
3055 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056 }
3057}
3058
Tejun Heof3187192007-04-17 23:44:07 +09003059int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3060{
3061 int i, rc;
3062
3063 for (i = 0; i < host->n_ports; i++) {
3064 struct ata_port *ap = host->ports[i];
3065 struct Scsi_Host *shost;
3066
3067 rc = -ENOMEM;
3068 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3069 if (!shost)
3070 goto err_alloc;
3071
3072 *(struct ata_port **)&shost->hostdata[0] = ap;
3073 ap->scsi_host = shost;
3074
3075 shost->transportt = &ata_scsi_transport_template;
3076 shost->unique_id = ap->print_id;
3077 shost->max_id = 16;
3078 shost->max_lun = 1;
3079 shost->max_channel = 1;
3080 shost->max_cmd_len = 16;
3081
Tejun Heo31cc23b2007-09-23 13:14:12 +09003082 /* Schedule policy is determined by ->qc_defer()
3083 * callback and it needs to see every deferred qc.
3084 * Set host_blocked to 1 to prevent SCSI midlayer from
3085 * automatically deferring requests.
3086 */
3087 shost->max_host_blocked = 1;
3088
Tejun Heof3187192007-04-17 23:44:07 +09003089 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3090 if (rc)
3091 goto err_add;
3092 }
3093
3094 return 0;
3095
3096 err_add:
3097 scsi_host_put(host->ports[i]->scsi_host);
3098 err_alloc:
3099 while (--i >= 0) {
3100 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3101
3102 scsi_remove_host(shost);
3103 scsi_host_put(shost);
3104 }
3105 return rc;
3106}
3107
Tejun Heo1ae46312007-07-16 14:29:40 +09003108void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003109{
Tejun Heo1ae46312007-07-16 14:29:40 +09003110 int tries = 5;
3111 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003112 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003113 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003114
Tejun Heo198e0fe2006-04-02 18:51:52 +09003115 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003116 return;
3117
Tejun Heo1ae46312007-07-16 14:29:40 +09003118 repeat:
Tejun Heo41bda9c2007-08-06 18:36:24 +09003119 ata_port_for_each_link(link, ap) {
3120 ata_link_for_each_dev(dev, link) {
3121 struct scsi_device *sdev;
3122 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003123
Tejun Heo41bda9c2007-08-06 18:36:24 +09003124 if (!ata_dev_enabled(dev) || dev->sdev)
3125 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003126
Tejun Heo41bda9c2007-08-06 18:36:24 +09003127 if (ata_is_host_link(link))
3128 id = dev->devno;
3129 else
3130 channel = link->pmp;
3131
3132 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3133 NULL);
3134 if (!IS_ERR(sdev)) {
3135 dev->sdev = sdev;
3136 scsi_device_put(sdev);
3137 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003138 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003139 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003140
3141 /* If we scanned while EH was in progress or allocation
3142 * failure occurred, scan would have failed silently. Check
3143 * whether all devices are attached.
3144 */
Tejun Heo41bda9c2007-08-06 18:36:24 +09003145 ata_port_for_each_link(link, ap) {
3146 ata_link_for_each_dev(dev, link) {
3147 if (ata_dev_enabled(dev) && !dev->sdev)
3148 goto exit_loop;
3149 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003150 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003151 exit_loop:
3152 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003153 return;
3154
3155 /* we're missing some SCSI devices */
3156 if (sync) {
3157 /* If caller requested synchrnous scan && we've made
3158 * any progress, sleep briefly and repeat.
3159 */
3160 if (dev != last_failed_dev) {
3161 msleep(100);
3162 last_failed_dev = dev;
3163 goto repeat;
3164 }
3165
3166 /* We might be failing to detect boot device, give it
3167 * a few more chances.
3168 */
3169 if (--tries) {
3170 msleep(100);
3171 goto repeat;
3172 }
3173
3174 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3175 "failed without making any progress,\n"
3176 " switching to async\n");
3177 }
3178
3179 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3180 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003181}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003182
3183/**
3184 * ata_scsi_offline_dev - offline attached SCSI device
3185 * @dev: ATA device to offline attached SCSI device for
3186 *
3187 * This function is called from ata_eh_hotplug() and responsible
3188 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003189 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003190 * against clearing.
3191 *
3192 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003193 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003194 *
3195 * RETURNS:
3196 * 1 if attached SCSI device exists, 0 otherwise.
3197 */
3198int ata_scsi_offline_dev(struct ata_device *dev)
3199{
3200 if (dev->sdev) {
3201 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3202 return 1;
3203 }
3204 return 0;
3205}
Tejun Heo580b21022006-05-31 18:28:05 +09003206
3207/**
3208 * ata_scsi_remove_dev - remove attached SCSI device
3209 * @dev: ATA device to remove attached SCSI device for
3210 *
3211 * This function is called from ata_eh_scsi_hotplug() and
3212 * responsible for removing the SCSI device attached to @dev.
3213 *
3214 * LOCKING:
3215 * Kernel thread context (may sleep).
3216 */
3217static void ata_scsi_remove_dev(struct ata_device *dev)
3218{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003219 struct ata_port *ap = dev->link->ap;
Tejun Heo580b21022006-05-31 18:28:05 +09003220 struct scsi_device *sdev;
3221 unsigned long flags;
3222
3223 /* Alas, we need to grab scan_mutex to ensure SCSI device
3224 * state doesn't change underneath us and thus
3225 * scsi_device_get() always succeeds. The mutex locking can
3226 * be removed if there is __scsi_device_get() interface which
3227 * increments reference counts regardless of device state.
3228 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003229 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003230 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b21022006-05-31 18:28:05 +09003231
Jeff Garzikcca39742006-08-24 03:19:22 -04003232 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b21022006-05-31 18:28:05 +09003233 sdev = dev->sdev;
3234 dev->sdev = NULL;
3235
3236 if (sdev) {
3237 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003238 * away underneath us after the host lock and
Tejun Heo580b21022006-05-31 18:28:05 +09003239 * scan_mutex are released. Hold onto it.
3240 */
3241 if (scsi_device_get(sdev) == 0) {
3242 /* The following ensures the attached sdev is
3243 * offline on return from ata_scsi_offline_dev()
3244 * regardless it wins or loses the race
3245 * against this function.
3246 */
3247 scsi_device_set_state(sdev, SDEV_OFFLINE);
3248 } else {
3249 WARN_ON(1);
3250 sdev = NULL;
3251 }
3252 }
3253
Jeff Garzikba6a1302006-06-22 23:46:10 -04003254 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003255 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b21022006-05-31 18:28:05 +09003256
3257 if (sdev) {
3258 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3259 sdev->sdev_gendev.bus_id);
3260
3261 scsi_remove_device(sdev);
3262 scsi_device_put(sdev);
3263 }
3264}
3265
Tejun Heo41bda9c2007-08-06 18:36:24 +09003266static void ata_scsi_handle_link_detach(struct ata_link *link)
3267{
3268 struct ata_port *ap = link->ap;
3269 struct ata_device *dev;
3270
3271 ata_link_for_each_dev(dev, link) {
3272 unsigned long flags;
3273
3274 if (!(dev->flags & ATA_DFLAG_DETACHED))
3275 continue;
3276
3277 spin_lock_irqsave(ap->lock, flags);
3278 dev->flags &= ~ATA_DFLAG_DETACHED;
3279 spin_unlock_irqrestore(ap->lock, flags);
3280
3281 ata_scsi_remove_dev(dev);
3282 }
3283}
3284
Tejun Heo580b21022006-05-31 18:28:05 +09003285/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003286 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003287 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003288 *
3289 * Tell the block layer to send a media change notification
3290 * event.
3291 *
3292 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003293 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003294 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003295void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003296{
Tejun Heo854c73a2007-09-23 13:14:11 +09003297 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003298 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3299 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003300}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003301
3302/**
Tejun Heo580b21022006-05-31 18:28:05 +09003303 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003304 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b21022006-05-31 18:28:05 +09003305 *
3306 * Perform SCSI part of hotplug. It's executed from a separate
3307 * workqueue after EH completes. This is necessary because SCSI
3308 * hot plugging requires working EH and hot unplugging is
3309 * synchronized with hot plugging with a mutex.
3310 *
3311 * LOCKING:
3312 * Kernel thread context (may sleep).
3313 */
David Howells65f27f32006-11-22 14:55:48 +00003314void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b21022006-05-31 18:28:05 +09003315{
David Howells65f27f32006-11-22 14:55:48 +00003316 struct ata_port *ap =
3317 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003318 int i;
Tejun Heo580b21022006-05-31 18:28:05 +09003319
Tejun Heob51e9e52006-06-29 01:29:30 +09003320 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b21022006-05-31 18:28:05 +09003321 DPRINTK("ENTER/EXIT - unloading\n");
3322 return;
3323 }
3324
3325 DPRINTK("ENTER\n");
3326
Tejun Heo41bda9c2007-08-06 18:36:24 +09003327 /* Unplug detached devices. We cannot use link iterator here
3328 * because PMP links have to be scanned even if PMP is
3329 * currently not attached. Iterate manually.
3330 */
3331 ata_scsi_handle_link_detach(&ap->link);
3332 if (ap->pmp_link)
3333 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3334 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b21022006-05-31 18:28:05 +09003335
3336 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003337 ata_scsi_scan_host(ap, 0);
Tejun Heo580b21022006-05-31 18:28:05 +09003338
3339 DPRINTK("EXIT\n");
3340}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003341
3342/**
3343 * ata_scsi_user_scan - indication for user-initiated bus scan
3344 * @shost: SCSI host to scan
3345 * @channel: Channel to scan
3346 * @id: ID to scan
3347 * @lun: LUN to scan
3348 *
3349 * This function is called when user explicitly requests bus
3350 * scan. Set probe pending flag and invoke EH.
3351 *
3352 * LOCKING:
3353 * SCSI layer (we don't care)
3354 *
3355 * RETURNS:
3356 * Zero.
3357 */
3358static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3359 unsigned int id, unsigned int lun)
3360{
3361 struct ata_port *ap = ata_shost_to_port(shost);
3362 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003363 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003364
3365 if (!ap->ops->error_handler)
3366 return -EOPNOTSUPP;
3367
Tejun Heo41bda9c2007-08-06 18:36:24 +09003368 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003369 return -EINVAL;
3370
Tejun Heo071f44b2008-04-07 22:47:22 +09003371 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003372 if (channel != SCAN_WILD_CARD && channel)
3373 return -EINVAL;
3374 devno = id;
3375 } else {
3376 if (id != SCAN_WILD_CARD && id)
3377 return -EINVAL;
3378 devno = channel;
3379 }
3380
Jeff Garzikba6a1302006-06-22 23:46:10 -04003381 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003382
Tejun Heo41bda9c2007-08-06 18:36:24 +09003383 if (devno == SCAN_WILD_CARD) {
3384 struct ata_link *link;
3385
3386 ata_port_for_each_link(link, ap) {
3387 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003388 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003389 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003390 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003391 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003392 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003393
3394 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003395 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003396 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003397 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003398 } else
3399 rc = -EINVAL;
3400 }
3401
Tejun Heo309afcb2006-09-30 18:07:17 +09003402 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003403 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003404 spin_unlock_irqrestore(ap->lock, flags);
3405 ata_port_wait_eh(ap);
3406 } else
3407 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003408
3409 return rc;
3410}
zhao, forrest3057ac32006-06-12 12:01:34 +08003411
3412/**
Tejun Heod0171262006-06-12 22:51:14 +09003413 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003414 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003415 *
Tejun Heod0171262006-06-12 22:51:14 +09003416 * After ATA pass thru (SAT) commands are executed successfully,
3417 * libata need to propagate the changes to SCSI layer. This
3418 * function must be executed from ata_aux_wq such that sdev
3419 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003420 *
Tejun Heod0171262006-06-12 22:51:14 +09003421 * LOCKING:
3422 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003423 */
David Howells65f27f32006-11-22 14:55:48 +00003424void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003425{
David Howells65f27f32006-11-22 14:55:48 +00003426 struct ata_port *ap =
3427 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003428 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003429 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003430 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003431
Tejun Heof84e7e42006-11-22 11:21:31 +09003432 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003433
Tejun Heo41bda9c2007-08-06 18:36:24 +09003434 ata_port_for_each_link(link, ap) {
3435 ata_link_for_each_dev(dev, link) {
3436 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003437
Tejun Heo41bda9c2007-08-06 18:36:24 +09003438 if (!ata_dev_enabled(dev) || !sdev)
3439 continue;
3440 if (scsi_device_get(sdev))
3441 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003442
Tejun Heo41bda9c2007-08-06 18:36:24 +09003443 spin_unlock_irqrestore(ap->lock, flags);
3444 scsi_rescan_device(&(sdev->sdev_gendev));
3445 scsi_device_put(sdev);
3446 spin_lock_irqsave(ap->lock, flags);
3447 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003448 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003449
3450 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003451}
Brian King80289162006-08-07 14:27:31 -05003452
3453/**
3454 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003455 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003456 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003457 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003458 *
3459 * LOCKING:
3460 * PCI/etc. bus probe sem.
3461 *
3462 * RETURNS:
3463 * ata_port pointer on success / NULL on failure.
3464 */
3465
Jeff Garzikcca39742006-08-24 03:19:22 -04003466struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003467 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003468 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003469{
Tejun Heof3187192007-04-17 23:44:07 +09003470 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003471
Tejun Heof3187192007-04-17 23:44:07 +09003472 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003473 if (!ap)
3474 return NULL;
3475
Tejun Heof3187192007-04-17 23:44:07 +09003476 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003477 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003478 ap->pio_mask = port_info->pio_mask;
3479 ap->mwdma_mask = port_info->mwdma_mask;
3480 ap->udma_mask = port_info->udma_mask;
3481 ap->flags |= port_info->flags;
3482 ap->ops = port_info->port_ops;
3483 ap->cbl = ATA_CBL_SATA;
3484
Brian King80289162006-08-07 14:27:31 -05003485 return ap;
3486}
3487EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3488
3489/**
3490 * ata_sas_port_start - Set port up for dma.
3491 * @ap: Port to initialize
3492 *
3493 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003494 * initialized.
Brian King80289162006-08-07 14:27:31 -05003495 *
3496 * May be used as the port_start() entry in ata_port_operations.
3497 *
3498 * LOCKING:
3499 * Inherited from caller.
3500 */
3501int ata_sas_port_start(struct ata_port *ap)
3502{
James Bottomleydde20202008-02-19 11:36:56 +01003503 return 0;
Brian King80289162006-08-07 14:27:31 -05003504}
3505EXPORT_SYMBOL_GPL(ata_sas_port_start);
3506
3507/**
3508 * ata_port_stop - Undo ata_sas_port_start()
3509 * @ap: Port to shut down
3510 *
Brian King80289162006-08-07 14:27:31 -05003511 * May be used as the port_stop() entry in ata_port_operations.
3512 *
3513 * LOCKING:
3514 * Inherited from caller.
3515 */
3516
3517void ata_sas_port_stop(struct ata_port *ap)
3518{
Brian King80289162006-08-07 14:27:31 -05003519}
3520EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3521
3522/**
3523 * ata_sas_port_init - Initialize a SATA device
3524 * @ap: SATA port to initialize
3525 *
3526 * LOCKING:
3527 * PCI/etc. bus probe sem.
3528 *
3529 * RETURNS:
3530 * Zero on success, non-zero on error.
3531 */
3532
3533int ata_sas_port_init(struct ata_port *ap)
3534{
3535 int rc = ap->ops->port_start(ap);
3536
Tejun Heof3187192007-04-17 23:44:07 +09003537 if (!rc) {
3538 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003539 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003540 }
Brian King80289162006-08-07 14:27:31 -05003541
3542 return rc;
3543}
3544EXPORT_SYMBOL_GPL(ata_sas_port_init);
3545
3546/**
3547 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3548 * @ap: SATA port to destroy
3549 *
3550 */
3551
3552void ata_sas_port_destroy(struct ata_port *ap)
3553{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003554 if (ap->ops->port_stop)
3555 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003556 kfree(ap);
3557}
3558EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3559
3560/**
3561 * ata_sas_slave_configure - Default slave_config routine for libata devices
3562 * @sdev: SCSI device to configure
3563 * @ap: ATA port to which SCSI device is attached
3564 *
3565 * RETURNS:
3566 * Zero.
3567 */
3568
3569int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3570{
3571 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003572 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003573 return 0;
3574}
3575EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3576
3577/**
3578 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3579 * @cmd: SCSI command to be sent
3580 * @done: Completion function, called when command is complete
3581 * @ap: ATA port to which the command is being sent
3582 *
3583 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003584 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3585 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003586 */
3587
3588int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3589 struct ata_port *ap)
3590{
Brian King08475a12006-11-20 13:51:56 -06003591 int rc = 0;
3592
Brian King80289162006-08-07 14:27:31 -05003593 ata_scsi_dump_cdb(ap, cmd);
3594
Tejun Heo2486fa52008-07-31 07:52:40 +09003595 if (likely(ata_dev_enabled(ap->link.device)))
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003596 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003597 else {
3598 cmd->result = (DID_BAD_TARGET << 16);
3599 done(cmd);
3600 }
Brian King08475a12006-11-20 13:51:56 -06003601 return rc;
Brian King80289162006-08-07 14:27:31 -05003602}
3603EXPORT_SYMBOL_GPL(ata_sas_queuecmd);