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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
Douglas Gilbertae006512005-10-09 09:09:35 -0400193static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
194 void (*done)(struct scsi_cmnd *))
195{
196 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
197 /* "Invalid field in cbd" */
198 done(cmd);
199}
200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201/**
202 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
203 * @sdev: SCSI device for which BIOS geometry is to be determined
204 * @bdev: block device associated with @sdev
205 * @capacity: capacity of SCSI device
206 * @geom: location to which geometry will be output
207 *
208 * Generic bios head/sector/cylinder calculator
209 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
210 * mapping. Some situations may arise where the disk is not
211 * bootable if this is not used.
212 *
213 * LOCKING:
214 * Defined by the SCSI layer. We don't really care.
215 *
216 * RETURNS:
217 * Zero.
218 */
219int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
220 sector_t capacity, int geom[])
221{
222 geom[0] = 255;
223 geom[1] = 63;
224 sector_div(capacity, 255*63);
225 geom[2] = capacity;
226
227 return 0;
228}
229
Jeff Garzikb0955182005-05-12 15:45:22 -0400230/**
Tejun Heo5924b742007-01-02 20:20:07 +0900231 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
232 * @sdev: SCSI device to get identify data for
233 * @arg: User buffer area for identify data
234 *
235 * LOCKING:
236 * Defined by the SCSI layer. We don't really care.
237 *
238 * RETURNS:
239 * Zero on success, negative errno on error.
240 */
241static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
242{
243 struct ata_port *ap = ata_shost_to_port(sdev->host);
244 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
245 u16 __user *dst = arg;
246 char buf[40];
247
248 if (!dev)
249 return -ENOMSG;
250
251 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
252 return -EFAULT;
253
254 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
255 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
256 return -EFAULT;
257
258 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
259 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
260 return -EFAULT;
261
262 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
263 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
264 return -EFAULT;
265
266 return 0;
267}
268
269/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400270 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800271 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400272 * @arg: User provided data for issuing command
273 *
274 * LOCKING:
275 * Defined by the SCSI layer. We don't really care.
276 *
277 * RETURNS:
278 * Zero on success, negative errno on error.
279 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400280int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
281{
282 int rc = 0;
283 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700284 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400285 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600286 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700287 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400288
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500289 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400290 return -EINVAL;
291
292 if (copy_from_user(args, arg, sizeof(args)))
293 return -EFAULT;
294
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700295 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
296 if (!sensebuf)
297 return -ENOMEM;
298
Jeff Garzikb0955182005-05-12 15:45:22 -0400299 memset(scsi_cmd, 0, sizeof(scsi_cmd));
300
301 if (args[3]) {
302 argsize = SECTOR_SIZE * args[3];
303 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400304 if (argbuf == NULL) {
305 rc = -ENOMEM;
306 goto error;
307 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400308
309 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
310 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400311 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600312 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400313 } else {
314 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700315 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600316 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400317 }
318
319 scsi_cmd[0] = ATA_16;
320
321 scsi_cmd[4] = args[2];
322 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
323 scsi_cmd[6] = args[3];
324 scsi_cmd[8] = args[1];
325 scsi_cmd[10] = 0x4f;
326 scsi_cmd[12] = 0xc2;
327 } else {
328 scsi_cmd[6] = args[1];
329 }
330 scsi_cmd[14] = args[0];
331
332 /* Good values for timeout and retries? Values below
333 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700334 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400335 sensebuf, (10*HZ), 5, 0);
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700336
337 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
338 u8 *desc = sensebuf + 8;
339 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
340
341 /* If we set cc then ATA pass-through will cause a
342 * check condition even if no error. Filter that. */
343 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
344 struct scsi_sense_hdr sshdr;
345 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400346 &sshdr);
347 if (sshdr.sense_key == 0 &&
348 sshdr.asc == 0 && sshdr.ascq == 0)
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700349 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
350 }
351
352 /* Send userspace a few ATA registers (same as drivers/ide) */
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400353 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
354 desc[0] == 0x09) { /* code is "ATA Descriptor" */
355 args[0] = desc[13]; /* status */
356 args[1] = desc[3]; /* error */
357 args[2] = desc[5]; /* sector count (0:7) */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700358 if (copy_to_user(arg, args, sizeof(args)))
359 rc = -EFAULT;
360 }
361 }
362
363
364 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400365 rc = -EIO;
366 goto error;
367 }
368
Jeff Garzikb0955182005-05-12 15:45:22 -0400369 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500370 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400371 rc = -EFAULT;
372error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700373 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700374 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400375 return rc;
376}
377
378/**
379 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800380 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400381 * @arg: User provided data for issuing command
382 *
383 * LOCKING:
384 * Defined by the SCSI layer. We don't really care.
385 *
386 * RETURNS:
387 * Zero on success, negative errno on error.
388 */
389int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
390{
391 int rc = 0;
392 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800393 u8 args[7], *sensebuf = NULL;
394 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400395
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500396 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400397 return -EINVAL;
398
399 if (copy_from_user(args, arg, sizeof(args)))
400 return -EFAULT;
401
David Milburnaf068bd2007-01-30 00:59:15 -0800402 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
403 if (!sensebuf)
404 return -ENOMEM;
405
Jeff Garzikb0955182005-05-12 15:45:22 -0400406 memset(scsi_cmd, 0, sizeof(scsi_cmd));
407 scsi_cmd[0] = ATA_16;
408 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800409 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400410 scsi_cmd[4] = args[1];
411 scsi_cmd[6] = args[2];
412 scsi_cmd[8] = args[3];
413 scsi_cmd[10] = args[4];
414 scsi_cmd[12] = args[5];
Mark Lord277239f2007-03-30 17:45:52 -0400415 scsi_cmd[13] = args[6] & 0x4f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400416 scsi_cmd[14] = args[0];
417
Jeff Garzikb0955182005-05-12 15:45:22 -0400418 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500419 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800420 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
421 sensebuf, (10*HZ), 5, 0);
Jeff Garzikb0955182005-05-12 15:45:22 -0400422
David Milburnaf068bd2007-01-30 00:59:15 -0800423 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
424 u8 *desc = sensebuf + 8;
425 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
426
427 /* If we set cc then ATA pass-through will cause a
428 * check condition even if no error. Filter that. */
429 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
430 struct scsi_sense_hdr sshdr;
431 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
432 &sshdr);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400433 if (sshdr.sense_key == 0 &&
434 sshdr.asc == 0 && sshdr.ascq == 0)
David Milburnaf068bd2007-01-30 00:59:15 -0800435 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
436 }
437
438 /* Send userspace ATA registers */
439 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
440 desc[0] == 0x09) {/* code is "ATA Descriptor" */
441 args[0] = desc[13]; /* status */
442 args[1] = desc[3]; /* error */
443 args[2] = desc[5]; /* sector count (0:7) */
444 args[3] = desc[7]; /* lbal */
445 args[4] = desc[9]; /* lbam */
446 args[5] = desc[11]; /* lbah */
447 args[6] = desc[12]; /* select */
448 if (copy_to_user(arg, args, sizeof(args)))
449 rc = -EFAULT;
450 }
451 }
452
453 if (cmd_result) {
454 rc = -EIO;
455 goto error;
456 }
457
458 error:
459 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400460 return rc;
461}
462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
464{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 int val = -EINVAL, rc = -EINVAL;
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 switch (cmd) {
468 case ATA_IOC_GET_IO32:
469 val = 0;
470 if (copy_to_user(arg, &val, 1))
471 return -EFAULT;
472 return 0;
473
474 case ATA_IOC_SET_IO32:
475 val = (unsigned long) arg;
476 if (val != 0)
477 return -EINVAL;
478 return 0;
479
Tejun Heo5924b742007-01-02 20:20:07 +0900480 case HDIO_GET_IDENTITY:
481 return ata_get_identity(scsidev, arg);
482
Jeff Garzikb0955182005-05-12 15:45:22 -0400483 case HDIO_DRIVE_CMD:
484 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
485 return -EACCES;
486 return ata_cmd_ioctl(scsidev, arg);
487
488 case HDIO_DRIVE_TASK:
489 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
490 return -EACCES;
491 return ata_task_ioctl(scsidev, arg);
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 default:
494 rc = -ENOTTY;
495 break;
496 }
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 return rc;
499}
500
501/**
502 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 * @dev: ATA device to which the new command is attached
504 * @cmd: SCSI command that originated this ATA command
505 * @done: SCSI command completion function
506 *
507 * Obtain a reference to an unused ata_queued_cmd structure,
508 * which is the basic libata structure representing a single
509 * ATA command sent to the hardware.
510 *
511 * If a command was available, fill in the SCSI-specific
512 * portions of the structure with information on the
513 * current command.
514 *
515 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400516 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 *
518 * RETURNS:
519 * Command allocated, or %NULL if none available.
520 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100521static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
522 struct scsi_cmnd *cmd,
523 void (*done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524{
525 struct ata_queued_cmd *qc;
526
Tejun Heo3373efd2006-05-15 20:57:53 +0900527 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 if (qc) {
529 qc->scsicmd = cmd;
530 qc->scsidone = done;
531
Tejun Heoff2aeb12007-12-05 16:43:11 +0900532 qc->sg = scsi_sglist(cmd);
Boaz Harrosh71201652007-09-18 17:48:50 +0200533 qc->n_elem = scsi_sg_count(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 } else {
535 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
536 done(cmd);
537 }
538
539 return qc;
540}
541
Tejun Heoaacda372008-03-18 17:47:43 +0900542static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
543{
544 struct scsi_cmnd *scmd = qc->scsicmd;
545
546 qc->extrabytes = scmd->request->extra_len;
547 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
548}
549
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400551 * ata_dump_status - user friendly display of error info
552 * @id: id of the port in question
553 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400555 * Decode and dump the ATA error/status registers for the user so
556 * that they have some idea what really happened at the non
557 * make-believe layer.
558 *
559 * LOCKING:
560 * inherited from caller
561 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100562static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400563{
564 u8 stat = tf->command, err = tf->feature;
565
566 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
567 if (stat & ATA_BUSY) {
568 printk("Busy }\n"); /* Data is not valid in this case */
569 } else {
570 if (stat & 0x40) printk("DriveReady ");
571 if (stat & 0x20) printk("DeviceFault ");
572 if (stat & 0x10) printk("SeekComplete ");
573 if (stat & 0x08) printk("DataRequest ");
574 if (stat & 0x04) printk("CorrectedError ");
575 if (stat & 0x02) printk("Index ");
576 if (stat & 0x01) printk("Error ");
577 printk("}\n");
578
579 if (err) {
580 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
581 if (err & 0x04) printk("DriveStatusError ");
582 if (err & 0x80) {
583 if (err & 0x04) printk("BadCRC ");
584 else printk("Sector ");
585 }
586 if (err & 0x40) printk("UncorrectableError ");
587 if (err & 0x10) printk("SectorIdNotFound ");
588 if (err & 0x02) printk("TrackZeroNotFound ");
589 if (err & 0x01) printk("AddrMarkNotFound ");
590 printk("}\n");
591 }
592 }
593}
594
595/**
596 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800597 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400598 * @drv_stat: value contained in ATA status register
599 * @drv_err: value contained in ATA error register
600 * @sk: the sense key we'll fill out
601 * @asc: the additional sense code we'll fill out
602 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900603 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400604 *
605 * Converts an ATA error into a SCSI error. Fill out pointers to
606 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
607 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 *
609 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400610 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100612static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
613 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614{
Jeff Garzikb0955182005-05-12 15:45:22 -0400615 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100618 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 /* BBD|ECC|ID|MAR */
620 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
621 /* BBD|ECC|ID */
622 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
623 /* ECC|MC|MARK */
624 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
625 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
626 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
627 /* MC|ID|ABRT|TRK0|MARK */
628 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
629 /* MCR|MARK */
630 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
631 /* Bad address mark */
632 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
633 /* TRK0 */
634 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
635 /* Abort & !ICRC */
636 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
637 /* Media change request */
638 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
639 /* SRV */
640 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
641 /* Media change */
642 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
643 /* ECC */
644 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
645 /* BBD - block marked bad */
646 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
647 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
648 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100649 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 /* Must be first because BUSY means no other bits valid */
651 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
652 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
653 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
654 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
655 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
656 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 /*
659 * Is this an error we can process/parse
660 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400661 if (drv_stat & ATA_BUSY) {
662 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Jeff Garzikb0955182005-05-12 15:45:22 -0400665 if (drv_err) {
666 /* Look for drv_err */
667 for (i = 0; sense_table[i][0] != 0xFF; i++) {
668 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500669 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400670 sense_table[i][0]) {
671 *sk = sense_table[i][1];
672 *asc = sense_table[i][2];
673 *ascq = sense_table[i][3];
674 goto translate_done;
675 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400677 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900678 if (verbose)
679 printk(KERN_WARNING "ata%u: no sense translation for "
680 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 }
682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400684 for (i = 0; stat_table[i][0] != 0xFF; i++) {
685 if (stat_table[i][0] & drv_stat) {
686 *sk = stat_table[i][1];
687 *asc = stat_table[i][2];
688 *ascq = stat_table[i][3];
689 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400692 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900693 if (verbose)
694 printk(KERN_WARNING "ata%u: no sense translation for "
695 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Alan Cox2d202022006-03-21 15:53:46 +0000697 /* We need a sensible error return here, which is tricky, and one
698 that won't cause people to do things like return a disk wrongly */
699 *sk = ABORTED_COMMAND;
700 *asc = 0x00;
701 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400702
703 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900704 if (verbose)
705 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
706 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
707 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400708 return;
709}
710
711/*
Tejun Heo750426a2006-11-14 22:37:35 +0900712 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400713 * @qc: Command that completed.
714 *
715 * This function is specific to the ATA descriptor format sense
716 * block specified for the ATA pass through commands. Regardless
717 * of whether the command errored or not, return a sense
718 * block. Copy all controller registers into the sense
719 * block. Clear sense key, ASC & ASCQ if there is no error.
720 *
721 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900722 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400723 */
Tejun Heo750426a2006-11-14 22:37:35 +0900724static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400725{
726 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900727 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400728 unsigned char *sb = cmd->sense_buffer;
729 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900730 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400731
732 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
733
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400734 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400735
736 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400737 * Use ata_to_sense_error() to map status register bits
738 * onto sense key, asc & ascq.
739 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900740 if (qc->err_mask ||
741 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900742 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900743 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400744 sb[1] &= 0x0f;
745 }
746
747 /*
748 * Sense data is current and format is descriptor.
749 */
750 sb[0] = 0x72;
751
752 desc[0] = 0x09;
753
Tejun Heof38621b2006-11-14 22:37:35 +0900754 /* set length of additional sense data */
755 sb[7] = 14;
756 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400757
758 /*
759 * Copy registers into sense buffer.
760 */
761 desc[2] = 0x00;
762 desc[3] = tf->feature; /* == error reg */
763 desc[5] = tf->nsect;
764 desc[7] = tf->lbal;
765 desc[9] = tf->lbam;
766 desc[11] = tf->lbah;
767 desc[12] = tf->device;
768 desc[13] = tf->command; /* == status reg */
769
770 /*
771 * Fill in Extend bit, and the high order bytes
772 * if applicable.
773 */
774 if (tf->flags & ATA_TFLAG_LBA48) {
775 desc[2] |= 0x01;
776 desc[4] = tf->hob_nsect;
777 desc[6] = tf->hob_lbal;
778 desc[8] = tf->hob_lbam;
779 desc[10] = tf->hob_lbah;
780 }
781}
782
783/**
Tejun Heo750426a2006-11-14 22:37:35 +0900784 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -0400785 * @qc: Command that we are erroring out
786 *
Tejun Heod25614b2006-11-14 22:37:35 +0900787 * Generate sense block for a failed ATA command @qc. Descriptor
788 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -0400789 *
790 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900791 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400792 */
Tejun Heo750426a2006-11-14 22:37:35 +0900793static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400794{
Tejun Heod25614b2006-11-14 22:37:35 +0900795 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -0400796 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900797 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400798 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +0900799 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900800 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +0900801 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -0400802
803 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
804
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400805 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400806
Tejun Heod25614b2006-11-14 22:37:35 +0900807 /* sense data is current and format is descriptor */
808 sb[0] = 0x72;
809
810 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -0400811 * onto sense key, asc & ascq.
812 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900813 if (qc->err_mask ||
814 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900815 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +0900816 &sb[1], &sb[2], &sb[3], verbose);
817 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400818 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
Tejun Heod25614b2006-11-14 22:37:35 +0900820 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -0400821
Tejun Heod25614b2006-11-14 22:37:35 +0900822 /* information sense data descriptor */
823 sb[7] = 12;
824 desc[0] = 0x00;
825 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -0500826
Tejun Heod25614b2006-11-14 22:37:35 +0900827 desc[2] |= 0x80; /* valid */
828 desc[6] = block >> 40;
829 desc[7] = block >> 32;
830 desc[8] = block >> 24;
831 desc[9] = block >> 16;
832 desc[10] = block >> 8;
833 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834}
835
Brian Kinga6cce2a2006-03-17 17:04:15 -0600836static void ata_scsi_sdev_config(struct scsi_device *sdev)
837{
838 sdev->use_10_for_rw = 1;
839 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +0900840
841 /* Schedule policy is determined by ->qc_defer() callback and
842 * it needs to see every deferred qc. Set dev_blocked to 1 to
843 * prevent SCSI midlayer from automatically deferring
844 * requests.
845 */
846 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600847}
848
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100849/**
850 * atapi_drain_needed - Check whether data transfer may overflow
Randy Dunlap73fd8b62008-02-19 13:43:21 -0800851 * @rq: request to be checked
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100852 *
853 * ATAPI commands which transfer variable length data to host
854 * might overflow due to application error or hardare bug. This
855 * function checks whether overflow should be drained and ignored
856 * for @request.
857 *
858 * LOCKING:
859 * None.
860 *
861 * RETURNS:
862 * 1 if ; otherwise, 0.
863 */
864static int atapi_drain_needed(struct request *rq)
865{
866 if (likely(!blk_pc_request(rq)))
867 return 0;
868
869 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
870 return 0;
871
872 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
873}
874
875static int ata_scsi_dev_config(struct scsi_device *sdev,
876 struct ata_device *dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -0600877{
Tejun Heo914ed352006-11-01 18:39:55 +0900878 /* configure max sectors */
879 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -0600880
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100881 if (dev->class == ATA_DEV_ATAPI) {
882 struct request_queue *q = sdev->request_queue;
883 void *buf;
884
Tejun Heoe3790c72008-03-04 11:18:17 +0100885 /* set the min alignment and padding */
James Bottomleyd0ad3bc2008-01-22 13:43:48 -0600886 blk_queue_update_dma_alignment(sdev->request_queue,
887 ATA_DMA_PAD_SZ - 1);
Tejun Heoe3790c72008-03-04 11:18:17 +0100888 blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100889
890 /* configure draining */
891 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
892 if (!buf) {
893 ata_dev_printk(dev, KERN_ERR,
894 "drain buffer allocation failed\n");
895 return -ENOMEM;
896 }
897
898 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
899 } else {
James Bottomleyd0ad3bc2008-01-22 13:43:48 -0600900 /* ATA devices must be sector aligned */
901 blk_queue_update_dma_alignment(sdev->request_queue,
902 ATA_SECT_SIZE - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +0900903 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +0100904 }
Tejun Heod8cf5382008-01-15 08:46:59 +0900905
Jeff Garzikf26792d2007-10-29 17:18:39 -0400906 if (dev->flags & ATA_DFLAG_AN)
907 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
908
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900909 if (dev->flags & ATA_DFLAG_NCQ) {
910 int depth;
911
912 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
913 depth = min(ATA_MAX_QUEUE - 1, depth);
914 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
915 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100916
917 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600918}
919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920/**
921 * ata_scsi_slave_config - Set SCSI device attributes
922 * @sdev: SCSI device to examine
923 *
924 * This is called before we actually start reading
925 * and writing to the device, to configure certain
926 * SCSI mid-layer behaviors.
927 *
928 * LOCKING:
929 * Defined by SCSI layer. We don't really care.
930 */
931
932int ata_scsi_slave_config(struct scsi_device *sdev)
933{
Tejun Heo31534362006-05-31 18:27:36 +0900934 struct ata_port *ap = ata_shost_to_port(sdev->host);
935 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100936 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +0900937
Brian Kinga6cce2a2006-03-17 17:04:15 -0600938 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Tejun Heo31534362006-05-31 18:27:36 +0900940 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100941 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100943 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944}
945
946/**
Tejun Heo83c47bc2006-05-31 18:28:07 +0900947 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
948 * @sdev: SCSI device to be destroyed
949 *
950 * @sdev is about to be destroyed for hot/warm unplugging. If
951 * this unplugging was initiated by libata as indicated by NULL
952 * dev->sdev, this function doesn't have to do anything.
953 * Otherwise, SCSI layer initiated warm-unplug is in progress.
954 * Clear dev->sdev, schedule the device for ATA detach and invoke
955 * EH.
956 *
957 * LOCKING:
958 * Defined by SCSI layer. We don't really care.
959 */
960void ata_scsi_slave_destroy(struct scsi_device *sdev)
961{
962 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100963 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +0900964 unsigned long flags;
965 struct ata_device *dev;
966
967 if (!ap->ops->error_handler)
968 return;
969
Jeff Garzikba6a1302006-06-22 23:46:10 -0400970 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900971 dev = __ata_scsi_find_dev(ap, sdev);
972 if (dev && dev->sdev) {
973 /* SCSI device already in CANCEL state, no need to offline it */
974 dev->sdev = NULL;
975 dev->flags |= ATA_DFLAG_DETACH;
976 ata_port_schedule_eh(ap);
977 }
Jeff Garzikba6a1302006-06-22 23:46:10 -0400978 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100979
980 kfree(q->dma_drain_buffer);
981 q->dma_drain_buffer = NULL;
982 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +0900983}
984
985/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900986 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
987 * @sdev: SCSI device to configure queue depth for
988 * @queue_depth: new queue depth
989 *
990 * This is libata standard hostt->change_queue_depth callback.
991 * SCSI will call into this callback when user tries to set queue
992 * depth via sysfs.
993 *
994 * LOCKING:
995 * SCSI layer (we don't care)
996 *
997 * RETURNS:
998 * Newly configured queue depth.
999 */
1000int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1001{
1002 struct ata_port *ap = ata_shost_to_port(sdev->host);
1003 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +09001004 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001005
Tejun Heoc3c70c42007-02-20 23:31:22 +09001006 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001007 return sdev->queue_depth;
1008
1009 dev = ata_scsi_find_dev(ap, sdev);
1010 if (!dev || !ata_dev_enabled(dev))
1011 return sdev->queue_depth;
1012
Tejun Heoc3c70c42007-02-20 23:31:22 +09001013 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001014 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001015 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1016 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001017 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001018 queue_depth = 1;
1019 }
Tejun Heo360f6542006-09-30 19:45:00 +09001020 spin_unlock_irqrestore(ap->lock, flags);
1021
Tejun Heoc3c70c42007-02-20 23:31:22 +09001022 /* limit and apply queue depth */
1023 queue_depth = min(queue_depth, sdev->host->can_queue);
1024 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1025 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1026
1027 if (sdev->queue_depth == queue_depth)
1028 return -EINVAL;
1029
1030 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001031 return queue_depth;
1032}
1033
Tejun Heod9aca222007-05-17 16:43:26 +02001034/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001035static void ata_delayed_done_timerfn(unsigned long arg)
1036{
1037 struct scsi_cmnd *scmd = (void *)arg;
1038
1039 scmd->scsi_done(scmd);
1040}
1041
Tejun Heod9aca222007-05-17 16:43:26 +02001042/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001043static void ata_delayed_done(struct scsi_cmnd *scmd)
1044{
1045 static struct timer_list timer;
1046
1047 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1048 mod_timer(&timer, jiffies + 5 * HZ);
1049}
1050
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001051/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001052 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1053 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001054 *
1055 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1056 * (to start). Perhaps these commands should be preceded by
1057 * CHECK POWER MODE to see what power mode the device is already in.
1058 * [See SAT revision 5 at www.t10.org]
1059 *
1060 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001061 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001062 *
1063 * RETURNS:
1064 * Zero on success, non-zero on error.
1065 */
Tejun Heoad706992006-12-17 10:45:57 +09001066static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001067{
Tejun Heo542b1442006-12-17 10:45:08 +09001068 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001069 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001070 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001071
Tejun Heo2e5704f2006-12-17 10:46:33 +09001072 if (scmd->cmd_len < 5)
1073 goto invalid_fld;
1074
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001075 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1076 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001077 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001078 ; /* ignore IMMED bit, violates sat-r05 */
1079 }
Tejun Heo542b1442006-12-17 10:45:08 +09001080 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001081 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001082 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001083 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001084
Tejun Heo542b1442006-12-17 10:45:08 +09001085 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001086 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001087
1088 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001089 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001090
1091 tf->lbah = 0x0;
1092 tf->lbam = 0x0;
1093 tf->lbal = 0x0;
1094 tf->device |= ATA_LBA;
1095 } else {
1096 /* CHS */
1097 tf->lbal = 0x1; /* sect */
1098 tf->lbam = 0x0; /* cyl low */
1099 tf->lbah = 0x0; /* cyl high */
1100 }
1101
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001102 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001103 } else {
1104 /* XXX: This is for backward compatibility, will be
1105 * removed. Read Documentation/feature-removal-schedule.txt
1106 * for more info.
1107 */
Tejun Heod9aca222007-05-17 16:43:26 +02001108 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
Tejun Heo920a4b12007-05-04 21:28:48 +02001109 (system_state == SYSTEM_HALT ||
1110 system_state == SYSTEM_POWER_OFF)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001111 static unsigned long warned;
Tejun Heo920a4b12007-05-04 21:28:48 +02001112
Tejun Heoda071b42007-05-14 17:26:18 +02001113 if (!test_and_set_bit(0, &warned)) {
Tejun Heo920a4b12007-05-04 21:28:48 +02001114 ata_dev_printk(qc->dev, KERN_WARNING,
1115 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1116 "UPDATE SHUTDOWN UTILITY\n");
1117 ata_dev_printk(qc->dev, KERN_WARNING,
1118 "For more info, visit "
1119 "http://linux-ata.org/shutdown.html\n");
Tejun Heoda071b42007-05-14 17:26:18 +02001120
1121 /* ->scsi_done is not used, use it for
1122 * delayed completion.
1123 */
1124 scmd->scsi_done = qc->scsidone;
1125 qc->scsidone = ata_delayed_done;
Tejun Heo920a4b12007-05-04 21:28:48 +02001126 }
1127 scmd->result = SAM_STAT_GOOD;
1128 return 1;
1129 }
1130
Robert Hancock78981a72007-01-30 00:59:18 -08001131 /* Issue ATA STANDBY IMMEDIATE command */
1132 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001133 }
Robert Hancock78981a72007-01-30 00:59:18 -08001134
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001135 /*
1136 * Standby and Idle condition timers could be implemented but that
1137 * would require libata to implement the Power condition mode page
1138 * and allow the user to change it. Changing mode pages requires
1139 * MODE SELECT to be implemented.
1140 */
1141
1142 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001143
1144invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001145 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001146 /* "Invalid field in cbd" */
1147 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001148}
1149
1150
1151/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1153 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 *
1155 * Sets up an ATA taskfile to issue FLUSH CACHE or
1156 * FLUSH CACHE EXT.
1157 *
1158 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001159 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 *
1161 * RETURNS:
1162 * Zero on success, non-zero on error.
1163 */
Tejun Heoad706992006-12-17 10:45:57 +09001164static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165{
1166 struct ata_taskfile *tf = &qc->tf;
1167
1168 tf->flags |= ATA_TFLAG_DEVICE;
1169 tf->protocol = ATA_PROT_NODATA;
1170
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001171 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 tf->command = ATA_CMD_FLUSH_EXT;
1173 else
1174 tf->command = ATA_CMD_FLUSH;
1175
Tejun Heob666da32007-10-26 15:53:59 +09001176 /* flush is critical for IO integrity, consider it an IO command */
1177 qc->flags |= ATA_QCFLAG_IO;
1178
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 return 0;
1180}
1181
1182/**
Albert Lee3aef5232005-10-04 08:47:43 -04001183 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001184 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001185 *
1186 * Calculate LBA and transfer length for 6-byte commands.
1187 *
1188 * RETURNS:
1189 * @plba: the LBA
1190 * @plen: the transfer length
1191 */
Tejun Heo542b1442006-12-17 10:45:08 +09001192static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001193{
1194 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001195 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001196
1197 VPRINTK("six-byte command\n");
1198
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001199 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001200 lba |= ((u64)cdb[2]) << 8;
1201 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001202
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001203 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001204
1205 *plba = lba;
1206 *plen = len;
1207}
1208
1209/**
1210 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001211 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001212 *
1213 * Calculate LBA and transfer length for 10-byte commands.
1214 *
1215 * RETURNS:
1216 * @plba: the LBA
1217 * @plen: the transfer length
1218 */
Tejun Heo542b1442006-12-17 10:45:08 +09001219static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001220{
1221 u64 lba = 0;
1222 u32 len = 0;
1223
1224 VPRINTK("ten-byte command\n");
1225
Tejun Heo542b1442006-12-17 10:45:08 +09001226 lba |= ((u64)cdb[2]) << 24;
1227 lba |= ((u64)cdb[3]) << 16;
1228 lba |= ((u64)cdb[4]) << 8;
1229 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001230
Tejun Heo542b1442006-12-17 10:45:08 +09001231 len |= ((u32)cdb[7]) << 8;
1232 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001233
1234 *plba = lba;
1235 *plen = len;
1236}
1237
1238/**
1239 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001240 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001241 *
1242 * Calculate LBA and transfer length for 16-byte commands.
1243 *
1244 * RETURNS:
1245 * @plba: the LBA
1246 * @plen: the transfer length
1247 */
Tejun Heo542b1442006-12-17 10:45:08 +09001248static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001249{
1250 u64 lba = 0;
1251 u32 len = 0;
1252
1253 VPRINTK("sixteen-byte command\n");
1254
Tejun Heo542b1442006-12-17 10:45:08 +09001255 lba |= ((u64)cdb[2]) << 56;
1256 lba |= ((u64)cdb[3]) << 48;
1257 lba |= ((u64)cdb[4]) << 40;
1258 lba |= ((u64)cdb[5]) << 32;
1259 lba |= ((u64)cdb[6]) << 24;
1260 lba |= ((u64)cdb[7]) << 16;
1261 lba |= ((u64)cdb[8]) << 8;
1262 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001263
Tejun Heo542b1442006-12-17 10:45:08 +09001264 len |= ((u32)cdb[10]) << 24;
1265 len |= ((u32)cdb[11]) << 16;
1266 len |= ((u32)cdb[12]) << 8;
1267 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001268
1269 *plba = lba;
1270 *plen = len;
1271}
1272
1273/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1275 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 *
1277 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1278 *
1279 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001280 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 *
1282 * RETURNS:
1283 * Zero on success, non-zero on error.
1284 */
Tejun Heoad706992006-12-17 10:45:57 +09001285static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286{
Tejun Heo542b1442006-12-17 10:45:08 +09001287 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001289 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001291 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001292 u64 block;
1293 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
1295 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1296 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297
Tejun Heo2e5704f2006-12-17 10:46:33 +09001298 if (cdb[0] == VERIFY) {
1299 if (scmd->cmd_len < 10)
1300 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001301 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001302 } else if (cdb[0] == VERIFY_16) {
1303 if (scmd->cmd_len < 16)
1304 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001305 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001306 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001307 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308
Albert Lee8bf62ec2005-05-12 15:29:42 -04001309 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001310 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001311 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001312 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001313 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001314 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315
Albert Lee07506692005-10-12 15:04:18 +08001316 if (dev->flags & ATA_DFLAG_LBA) {
1317 tf->flags |= ATA_TFLAG_LBA;
1318
Albert Leec6a33e22005-10-12 15:12:26 +08001319 if (lba_28_ok(block, n_block)) {
1320 /* use LBA28 */
1321 tf->command = ATA_CMD_VERIFY;
1322 tf->device |= (block >> 24) & 0xf;
1323 } else if (lba_48_ok(block, n_block)) {
1324 if (!(dev->flags & ATA_DFLAG_LBA48))
1325 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001326
1327 /* use LBA48 */
1328 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001329 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
Albert Lee8bf62ec2005-05-12 15:29:42 -04001331 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332
Albert Lee8bf62ec2005-05-12 15:29:42 -04001333 tf->hob_lbah = (block >> 40) & 0xff;
1334 tf->hob_lbam = (block >> 32) & 0xff;
1335 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001336 } else
1337 /* request too large even for LBA48 */
1338 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001339
1340 tf->nsect = n_block & 0xff;
1341
1342 tf->lbah = (block >> 16) & 0xff;
1343 tf->lbam = (block >> 8) & 0xff;
1344 tf->lbal = block & 0xff;
1345
1346 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001348 /* CHS */
1349 u32 sect, head, cyl, track;
1350
Albert Leec6a33e22005-10-12 15:12:26 +08001351 if (!lba_28_ok(block, n_block))
1352 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001353
Albert Lee8bf62ec2005-05-12 15:29:42 -04001354 /* Convert LBA to CHS */
1355 track = (u32)block / dev->sectors;
1356 cyl = track / dev->heads;
1357 head = track % dev->heads;
1358 sect = (u32)block % dev->sectors + 1;
1359
Albert Leec187c4b2005-10-04 08:46:51 -04001360 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1361 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001362
1363 /* Check whether the converted CHS can fit.
1364 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001365 Head: 0-15
1366 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001367 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001368 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001369
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001371 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1372 tf->lbal = sect;
1373 tf->lbam = cyl;
1374 tf->lbah = cyl >> 8;
1375 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 }
1377
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001379
1380invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001381 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001382 /* "Invalid field in cbd" */
1383 return 1;
1384
1385out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001386 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001387 /* "Logical Block Address out of range" */
1388 return 1;
1389
1390nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001391 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001392 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393}
1394
1395/**
1396 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1397 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 *
1399 * Converts any of six SCSI read/write commands into the
1400 * ATA counterpart, including starting sector (LBA),
1401 * sector count, and taking into account the device's LBA48
1402 * support.
1403 *
1404 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1405 * %WRITE_16 are currently supported.
1406 *
1407 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001408 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 *
1410 * RETURNS:
1411 * Zero on success, non-zero on error.
1412 */
Tejun Heoad706992006-12-17 10:45:57 +09001413static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414{
Tejun Heo542b1442006-12-17 10:45:08 +09001415 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001416 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001417 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001418 u64 block;
1419 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001420 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Tejun Heo542b1442006-12-17 10:45:08 +09001422 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001423 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001425 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001426 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001427 case READ_10:
1428 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001429 if (unlikely(scmd->cmd_len < 10))
1430 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001431 scsi_10_lba_len(cdb, &block, &n_block);
1432 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001433 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001434 break;
1435 case READ_6:
1436 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001437 if (unlikely(scmd->cmd_len < 6))
1438 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001439 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001440
1441 /* for 6-byte r/w commands, transfer length 0
1442 * means 256 blocks of data, not 0 block.
1443 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001444 if (!n_block)
1445 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001446 break;
1447 case READ_16:
1448 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001449 if (unlikely(scmd->cmd_len < 16))
1450 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001451 scsi_16_lba_len(cdb, &block, &n_block);
1452 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001453 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001454 break;
1455 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001456 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001457 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 }
1459
Albert Lee8bf62ec2005-05-12 15:29:42 -04001460 /* Check and compose ATA command */
1461 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001462 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1463 * length 0 means transfer 0 block of data.
1464 * However, for ATA R/W commands, sector count 0 means
1465 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001466 *
1467 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001468 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001469 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001470
Tejun Heobd056d72006-11-14 22:47:10 +09001471 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001472 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001473
Tejun Heobd056d72006-11-14 22:47:10 +09001474 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1475 qc->tag);
1476 if (likely(rc == 0))
1477 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001478
Tejun Heobd056d72006-11-14 22:47:10 +09001479 if (rc == -ERANGE)
1480 goto out_of_range;
1481 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001482invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001483 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001484 /* "Invalid field in cbd" */
1485 return 1;
1486
1487out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001488 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001489 /* "Logical Block Address out of range" */
1490 return 1;
1491
1492nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001493 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001494 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495}
1496
Tejun Heo77853bf2006-01-23 13:09:36 +09001497static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498{
Tejun Heoc31f5712006-11-22 12:39:43 +09001499 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001501 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001502 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Jeff Garzikb0955182005-05-12 15:45:22 -04001504 /* For ATA pass thru (SAT) commands, generate a sense block if
1505 * user mandated it or if there's an error. Note that if we
1506 * generate because the user forced us to, a check condition
1507 * is generated and the ATA register values are returned
1508 * whether the command completed successfully or not. If there
1509 * was no error, SK, ASC and ASCQ will all be zero.
1510 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001511 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001512 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001513 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001514 } else {
1515 if (!need_sense) {
1516 cmd->result = SAM_STAT_GOOD;
1517 } else {
1518 /* TODO: decide which descriptor format to use
1519 * for 48b LBA devices and call that here
1520 * instead of the fixed desc, which is only
1521 * good for smaller LBA (and maybe CHS?)
1522 * devices.
1523 */
Tejun Heo750426a2006-11-14 22:37:35 +09001524 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001525 }
1526 }
1527
Tejun Heod9aca222007-05-17 16:43:26 +02001528 /* XXX: track spindown state for spindown skipping and warning */
Tejun Heo13b8d092007-05-15 12:29:22 +02001529 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1530 qc->tf.command == ATA_CMD_STANDBYNOW1))
1531 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1532 else if (likely(system_state != SYSTEM_HALT &&
1533 system_state != SYSTEM_POWER_OFF))
1534 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1535
Tejun Heoc31f5712006-11-22 12:39:43 +09001536 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001537 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538
1539 qc->scsidone(cmd);
1540
Tejun Heo77853bf2006-01-23 13:09:36 +09001541 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542}
1543
1544/**
1545 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 * @dev: ATA device to which the command is addressed
1547 * @cmd: SCSI command to execute
1548 * @done: SCSI command completion function
1549 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1550 *
1551 * Our ->queuecommand() function has decided that the SCSI
1552 * command issued can be directly translated into an ATA
1553 * command, rather than handled internally.
1554 *
1555 * This function sets up an ata_queued_cmd structure for the
1556 * SCSI command, and sends that ata_queued_cmd to the hardware.
1557 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001558 * The xlat_func argument (actor) returns 0 if ready to execute
1559 * ATA command, else 1 to finish translation. If 1 is returned
1560 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1561 * to be set reflecting an error condition or clean (early)
1562 * termination.
1563 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001565 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001566 *
1567 * RETURNS:
1568 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1569 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001571static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1572 void (*done)(struct scsi_cmnd *),
1573 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001575 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001577 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578
1579 VPRINTK("ENTER\n");
1580
Tejun Heo3373efd2006-05-15 20:57:53 +09001581 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001583 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
1585 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001586 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1587 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001588 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001589 ata_dev_printk(dev, KERN_WARNING,
1590 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001591 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 }
1593
Boaz Harrosh71201652007-09-18 17:48:50 +02001594 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595
1596 qc->dma_dir = cmd->sc_data_direction;
1597 }
1598
1599 qc->complete_fn = ata_scsi_qc_complete;
1600
Tejun Heoad706992006-12-17 10:45:57 +09001601 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001602 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603
Tejun Heo31cc23b2007-09-23 13:14:12 +09001604 if (ap->ops->qc_defer) {
1605 if ((rc = ap->ops->qc_defer(qc)))
1606 goto defer;
1607 }
1608
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001610 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
1612 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001613 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614
Douglas Gilbertae006512005-10-09 09:09:35 -04001615early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001616 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001617 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001618 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001619 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001620
1621err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001623 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001624 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001625err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001626 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001627 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001628
1629defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001630 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001631 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001632 if (rc == ATA_DEFER_LINK)
1633 return SCSI_MLQUEUE_DEVICE_BUSY;
1634 else
1635 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636}
1637
1638/**
1639 * ata_scsi_rbuf_get - Map response buffer.
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001640 * @cmd: SCSI command containing buffer to be mapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001641 * @flags: unsigned long variable to store irq enable status
1642 * @copy_in: copy in from user buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 *
Tejun Heo87340e92008-04-28 17:48:51 +09001644 * Prepare buffer for simulated SCSI commands.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 *
1646 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001647 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 *
1649 * RETURNS:
Tejun Heo87340e92008-04-28 17:48:51 +09001650 * Pointer to response buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 */
Tejun Heo87340e92008-04-28 17:48:51 +09001652static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1653 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654{
Tejun Heo87340e92008-04-28 17:48:51 +09001655 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656
Tejun Heo87340e92008-04-28 17:48:51 +09001657 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1658 if (copy_in)
1659 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1660 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1661 return ata_scsi_rbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662}
1663
1664/**
1665 * ata_scsi_rbuf_put - Unmap response buffer.
1666 * @cmd: SCSI command containing buffer to be unmapped.
Tejun Heo87340e92008-04-28 17:48:51 +09001667 * @copy_out: copy out result
1668 * @flags: @flags passed to ata_scsi_rbuf_get()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 *
Tejun Heo87340e92008-04-28 17:48:51 +09001670 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1671 * @copy_back is true.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 *
1673 * LOCKING:
Tejun Heo87340e92008-04-28 17:48:51 +09001674 * Unlocks ata_scsi_rbuf_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 */
Tejun Heo87340e92008-04-28 17:48:51 +09001676static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1677 unsigned long *flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678{
Tejun Heo87340e92008-04-28 17:48:51 +09001679 if (copy_out)
1680 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1681 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1682 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683}
1684
1685/**
1686 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1687 * @args: device IDENTIFY data / SCSI command of interest.
1688 * @actor: Callback hook for desired SCSI command simulator
1689 *
1690 * Takes care of the hard work of simulating a SCSI command...
1691 * Mapping the response buffer, calling the command's handler,
1692 * and handling the handler's return value. This return value
1693 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001694 * completed successfully (0), or not (in which case cmd->result
1695 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 *
1697 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001698 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 */
Tejun Heof0761be2008-04-28 17:16:52 +09001700static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Tejun Heo87340e92008-04-28 17:48:51 +09001701 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702{
1703 u8 *rbuf;
Tejun Heo87340e92008-04-28 17:48:51 +09001704 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001706 unsigned long flags;
1707
Tejun Heo87340e92008-04-28 17:48:51 +09001708 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1709 rc = actor(args, rbuf);
1710 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
Jeff Garzikb445c562008-02-29 19:10:51 -05001711
Douglas Gilbertae006512005-10-09 09:09:35 -04001712 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001714 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715}
1716
1717/**
1718 * ata_scsiop_inq_std - Simulate INQUIRY command
1719 * @args: device IDENTIFY data / SCSI command of interest.
1720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 *
1722 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001723 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 *
1725 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001726 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 */
Tejun Heo87340e92008-04-28 17:48:51 +09001728static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729{
Tejun Heo87340e92008-04-28 17:48:51 +09001730 const u8 versions[] = {
1731 0x60, /* SAM-3 (no version claimed) */
1732
1733 0x03,
1734 0x20, /* SBC-2 (no version claimed) */
1735
1736 0x02,
1737 0x60 /* SPC-3 (no version claimed) */
1738 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 u8 hdr[] = {
1740 TYPE_DISK,
1741 0,
1742 0x5, /* claim SPC-3 version compatibility */
1743 2,
1744 95 - 4
1745 };
1746
Tejun Heo87340e92008-04-28 17:48:51 +09001747 VPRINTK("ENTER\n");
1748
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 /* set scsi removeable (RMB) bit per ata bit */
1750 if (ata_id_removeable(args->id))
1751 hdr[1] |= (1 << 7);
1752
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001754 memcpy(&rbuf[8], "ATA ", 8);
1755 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1756 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757
Tejun Heo87340e92008-04-28 17:48:51 +09001758 if (rbuf[32] == 0 || rbuf[32] == ' ')
1759 memcpy(&rbuf[32], "n/a ", 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760
Tejun Heo87340e92008-04-28 17:48:51 +09001761 memcpy(rbuf + 59, versions, sizeof(versions));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762
1763 return 0;
1764}
1765
1766/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001767 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 * @args: device IDENTIFY data / SCSI command of interest.
1769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001771 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 *
1773 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001774 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 */
Tejun Heo87340e92008-04-28 17:48:51 +09001776static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777{
1778 const u8 pages[] = {
1779 0x00, /* page 0x00, this page */
1780 0x80, /* page 0x80, unit serial no page */
1781 0x83 /* page 0x83, device ident page */
1782 };
Tejun Heo87340e92008-04-28 17:48:51 +09001783
Jeff Garzikb142eb62006-03-21 20:37:47 -05001784 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Tejun Heo87340e92008-04-28 17:48:51 +09001785 memcpy(rbuf + 4, pages, sizeof(pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 return 0;
1787}
1788
1789/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001790 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791 * @args: device IDENTIFY data / SCSI command of interest.
1792 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 *
1794 * Returns ATA device serial number.
1795 *
1796 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001797 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 */
Tejun Heo87340e92008-04-28 17:48:51 +09001799static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800{
1801 const u8 hdr[] = {
1802 0,
1803 0x80, /* this page code */
1804 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001805 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 };
Tejun Heo87340e92008-04-28 17:48:51 +09001807
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 memcpy(rbuf, hdr, sizeof(hdr));
Tejun Heo87340e92008-04-28 17:48:51 +09001809 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1810 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 return 0;
1812}
1813
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001815 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 * @args: device IDENTIFY data / SCSI command of interest.
1817 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001819 * Yields two logical unit device identification designators:
1820 * - vendor specific ASCII containing the ATA serial number
1821 * - SAT defined "t10 vendor id based" containing ASCII vendor
1822 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 *
1824 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001825 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 */
Tejun Heo87340e92008-04-28 17:48:51 +09001827static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828{
Jeff Garzikb142eb62006-03-21 20:37:47 -05001829 const int sat_model_serial_desc_len = 68;
Tejun Heo87340e92008-04-28 17:48:51 +09001830 int num;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001831
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05001833 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834
Tejun Heo87340e92008-04-28 17:48:51 +09001835 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1836 rbuf[num + 0] = 2;
1837 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1838 num += 4;
1839 ata_id_string(args->id, (unsigned char *) rbuf + num,
1840 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1841 num += ATA_ID_SERNO_LEN;
1842
1843 /* SAT defined lu model and serial numbers descriptor */
1844 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1845 rbuf[num + 0] = 2;
1846 rbuf[num + 1] = 1;
1847 rbuf[num + 3] = sat_model_serial_desc_len;
1848 num += 4;
1849 memcpy(rbuf + num, "ATA ", 8);
1850 num += 8;
1851 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1852 ATA_ID_PROD_LEN);
1853 num += ATA_ID_PROD_LEN;
1854 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1855 ATA_ID_SERNO_LEN);
1856 num += ATA_ID_SERNO_LEN;
1857
Jeff Garzikb142eb62006-03-21 20:37:47 -05001858 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 return 0;
1860}
1861
1862/**
Jeff Garzikad355b42007-09-21 20:38:03 -04001863 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1864 * @args: device IDENTIFY data / SCSI command of interest.
1865 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Jeff Garzikad355b42007-09-21 20:38:03 -04001866 *
1867 * Yields SAT-specified ATA VPD page.
1868 *
1869 * LOCKING:
1870 * spin_lock_irqsave(host lock)
1871 */
Tejun Heo87340e92008-04-28 17:48:51 +09001872static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
Jeff Garzikad355b42007-09-21 20:38:03 -04001873{
Jeff Garzikad355b42007-09-21 20:38:03 -04001874 struct ata_taskfile tf;
Jeff Garzikad355b42007-09-21 20:38:03 -04001875
Jeff Garzikad355b42007-09-21 20:38:03 -04001876 memset(&tf, 0, sizeof(tf));
1877
Tejun Heo87340e92008-04-28 17:48:51 +09001878 rbuf[1] = 0x89; /* our page code */
1879 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1880 rbuf[3] = (0x238 & 0xff);
Jeff Garzikad355b42007-09-21 20:38:03 -04001881
Tejun Heo87340e92008-04-28 17:48:51 +09001882 memcpy(&rbuf[8], "linux ", 8);
1883 memcpy(&rbuf[16], "libata ", 16);
1884 memcpy(&rbuf[32], DRV_VERSION, 4);
1885 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04001886
1887 /* we don't store the ATA device signature, so we fake it */
1888
1889 tf.command = ATA_DRDY; /* really, this is Status reg */
1890 tf.lbal = 0x1;
1891 tf.nsect = 0x1;
1892
Tejun Heo87340e92008-04-28 17:48:51 +09001893 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
1894 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
Jeff Garzikad355b42007-09-21 20:38:03 -04001895
Tejun Heo87340e92008-04-28 17:48:51 +09001896 rbuf[56] = ATA_CMD_ID_ATA;
Jeff Garzikad355b42007-09-21 20:38:03 -04001897
Tejun Heo87340e92008-04-28 17:48:51 +09001898 memcpy(&rbuf[60], &args->id[0], 512);
Jeff Garzikad355b42007-09-21 20:38:03 -04001899 return 0;
1900}
1901
1902/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001903 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906 *
1907 * No operation. Simply returns success to caller, to indicate
1908 * that the caller should successfully complete this SCSI command.
1909 *
1910 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001911 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912 */
Tejun Heo87340e92008-04-28 17:48:51 +09001913static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914{
1915 VPRINTK("ENTER\n");
1916 return 0;
1917}
1918
1919/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 * ata_msense_caching - Simulate MODE SENSE caching info page
1921 * @id: device IDENTIFY data
Tejun Heo87340e92008-04-28 17:48:51 +09001922 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 *
1924 * Generate a caching info page, which conditionally indicates
1925 * write caching to the SCSI layer, depending on device
1926 * capabilities.
1927 *
1928 * LOCKING:
1929 * None.
1930 */
Tejun Heo87340e92008-04-28 17:48:51 +09001931static unsigned int ata_msense_caching(u16 *id, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932{
Tejun Heo87340e92008-04-28 17:48:51 +09001933 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 if (ata_id_wcache_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09001935 buf[2] |= (1 << 2); /* write cache enable */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 if (!ata_id_rahead_enabled(id))
Tejun Heo87340e92008-04-28 17:48:51 +09001937 buf[12] |= (1 << 5); /* disable read ahead */
1938 return sizeof(def_cache_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939}
1940
1941/**
1942 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
Tejun Heo87340e92008-04-28 17:48:51 +09001943 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 *
1945 * Generate a generic MODE SENSE control mode page.
1946 *
1947 * LOCKING:
1948 * None.
1949 */
Tejun Heo87340e92008-04-28 17:48:51 +09001950static unsigned int ata_msense_ctl_mode(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951{
Tejun Heo87340e92008-04-28 17:48:51 +09001952 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001953 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954}
1955
1956/**
1957 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
Randy Dunlapec2a20e2008-04-30 12:57:00 -07001958 * @buf: output buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 *
1960 * Generate a generic MODE SENSE r/w error recovery page.
1961 *
1962 * LOCKING:
1963 * None.
1964 */
Tejun Heo87340e92008-04-28 17:48:51 +09001965static unsigned int ata_msense_rw_recovery(u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966{
Tejun Heo87340e92008-04-28 17:48:51 +09001967 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001968 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969}
1970
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001971/*
1972 * We can turn this into a real blacklist if it's needed, for now just
1973 * blacklist any Maxtor BANC1G10 revision firmware
1974 */
1975static int ata_dev_supports_fua(u16 *id)
1976{
Tejun Heoa0cf7332007-01-02 20:18:49 +09001977 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001978
Jeff Garzikc3c013a2006-02-27 22:31:19 -05001979 if (!libata_fua)
1980 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001981 if (!ata_id_has_fua(id))
1982 return 0;
1983
Tejun Heoa0cf7332007-01-02 20:18:49 +09001984 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1985 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001986
Tejun Heo2e026712006-02-12 22:47:04 +09001987 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001988 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09001989 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01001990 return 1;
1991
1992 return 0; /* blacklisted */
1993}
1994
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995/**
1996 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1997 * @args: device IDENTIFY data / SCSI command of interest.
1998 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002000 * Simulate MODE SENSE commands. Assume this is invoked for direct
2001 * access devices (e.g. disks) only. There should be no block
2002 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 *
2004 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002005 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 */
Tejun Heo87340e92008-04-28 17:48:51 +09002007static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002009 struct ata_device *dev = args->dev;
Tejun Heo87340e92008-04-28 17:48:51 +09002010 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002011 const u8 sat_blk_desc[] = {
2012 0, 0, 0, 0, /* number of blocks: sat unspecified */
2013 0,
2014 0, 0x2, 0x0 /* block length: 512 bytes */
2015 };
2016 u8 pg, spg;
Tejun Heo87340e92008-04-28 17:48:51 +09002017 unsigned int ebd, page_control, six_byte;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002018 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
2020 VPRINTK("ENTER\n");
2021
2022 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002023 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2024 /*
2025 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002027
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002029 switch (page_control) {
2030 case 0: /* current */
2031 break; /* supported */
2032 case 3: /* saved */
2033 goto saving_not_supp;
2034 case 1: /* changeable */
2035 case 2: /* defaults */
2036 default:
2037 goto invalid_fld;
2038 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039
Tejun Heo87340e92008-04-28 17:48:51 +09002040 if (six_byte)
2041 p += 4 + (ebd ? 8 : 0);
2042 else
2043 p += 8 + (ebd ? 8 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002045 pg = scsicmd[2] & 0x3f;
2046 spg = scsicmd[3];
2047 /*
2048 * No mode subpages supported (yet) but asking for _all_
2049 * subpages may be valid
2050 */
2051 if (spg && (spg != ALL_SUB_MPAGES))
2052 goto invalid_fld;
2053
2054 switch(pg) {
2055 case RW_RECOVERY_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002056 p += ata_msense_rw_recovery(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 break;
2058
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002059 case CACHE_MPAGE:
Tejun Heo87340e92008-04-28 17:48:51 +09002060 p += ata_msense_caching(args->id, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 break;
2062
Tejun Heo87340e92008-04-28 17:48:51 +09002063 case CONTROL_MPAGE:
2064 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002067 case ALL_MPAGES:
Tejun Heo87340e92008-04-28 17:48:51 +09002068 p += ata_msense_rw_recovery(p);
2069 p += ata_msense_caching(args->id, p);
2070 p += ata_msense_ctl_mode(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 break;
2072
2073 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002074 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075 }
2076
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002077 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002078 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002079 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2080 dpofua = 1 << 4;
2081
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 if (six_byte) {
Tejun Heo87340e92008-04-28 17:48:51 +09002083 rbuf[0] = p - rbuf - 1;
2084 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002085 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002086 rbuf[3] = sizeof(sat_blk_desc);
2087 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002088 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 } else {
Tejun Heo87340e92008-04-28 17:48:51 +09002090 unsigned int output_len = p - rbuf - 2;
2091
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092 rbuf[0] = output_len >> 8;
Tejun Heo87340e92008-04-28 17:48:51 +09002093 rbuf[1] = output_len;
2094 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002095 if (ebd) {
Tejun Heo87340e92008-04-28 17:48:51 +09002096 rbuf[7] = sizeof(sat_blk_desc);
2097 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002098 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002101
2102invalid_fld:
2103 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2104 /* "Invalid field in cbd" */
2105 return 1;
2106
2107saving_not_supp:
2108 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2109 /* "Saving parameters not supported" */
2110 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111}
2112
2113/**
2114 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2115 * @args: device IDENTIFY data / SCSI command of interest.
2116 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 *
2118 * Simulate READ CAPACITY commands.
2119 *
2120 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002121 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122 */
Tejun Heo87340e92008-04-28 17:48:51 +09002123static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124{
Tejun Heo6a362612006-11-20 11:15:47 +09002125 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126
2127 VPRINTK("ENTER\n");
2128
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002130 if (last_lba >= 0xffffffffULL)
2131 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002132
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 /* sector count, 32-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002134 rbuf[0] = last_lba >> (8 * 3);
2135 rbuf[1] = last_lba >> (8 * 2);
2136 rbuf[2] = last_lba >> (8 * 1);
2137 rbuf[3] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138
2139 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002140 rbuf[6] = ATA_SECT_SIZE >> 8;
2141 rbuf[7] = ATA_SECT_SIZE & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 } else {
2143 /* sector count, 64-bit */
Tejun Heo87340e92008-04-28 17:48:51 +09002144 rbuf[0] = last_lba >> (8 * 7);
2145 rbuf[1] = last_lba >> (8 * 6);
2146 rbuf[2] = last_lba >> (8 * 5);
2147 rbuf[3] = last_lba >> (8 * 4);
2148 rbuf[4] = last_lba >> (8 * 3);
2149 rbuf[5] = last_lba >> (8 * 2);
2150 rbuf[6] = last_lba >> (8 * 1);
2151 rbuf[7] = last_lba;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152
2153 /* sector size */
Tejun Heo87340e92008-04-28 17:48:51 +09002154 rbuf[10] = ATA_SECT_SIZE >> 8;
2155 rbuf[11] = ATA_SECT_SIZE & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 }
2157
2158 return 0;
2159}
2160
2161/**
2162 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2163 * @args: device IDENTIFY data / SCSI command of interest.
2164 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165 *
2166 * Simulate REPORT LUNS command.
2167 *
2168 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002169 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 */
Tejun Heo87340e92008-04-28 17:48:51 +09002171static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172{
2173 VPRINTK("ENTER\n");
2174 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2175
2176 return 0;
2177}
2178
Tejun Heo77853bf2006-01-23 13:09:36 +09002179static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002180{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002181 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002182 /* FIXME: not quite right; we don't want the
2183 * translation of taskfile registers into
2184 * a sense descriptors, since that's only
2185 * correct for ATA, not ATAPI
2186 */
Tejun Heo750426a2006-11-14 22:37:35 +09002187 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002188 }
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002189
2190 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002191 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002192}
2193
2194/* is it pointless to prefer PIO for "safety reasons"? */
2195static inline int ata_pio_use_silly(struct ata_port *ap)
2196{
2197 return (ap->flags & ATA_FLAG_PIO_DMA);
2198}
2199
2200static void atapi_request_sense(struct ata_queued_cmd *qc)
2201{
2202 struct ata_port *ap = qc->ap;
2203 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002204
2205 DPRINTK("ATAPI request sense\n");
2206
Jeff Garzika939c962005-10-05 17:09:16 -04002207 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002208 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002209
Tejun Heo127102a2008-04-07 22:47:21 +09002210#ifdef CONFIG_ATA_SFF
James Bottomley855d8542008-04-18 13:18:48 -05002211 if (ap->ops->sff_tf_read)
2212 ap->ops->sff_tf_read(ap, &qc->tf);
Tejun Heo127102a2008-04-07 22:47:21 +09002213#endif
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002214
2215 /* fill these in, for the case where they are -not- overwritten */
2216 cmd->sense_buffer[0] = 0x70;
2217 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2218
2219 ata_qc_reinit(qc);
2220
Tejun Heo93f8fec2007-12-05 16:43:01 +09002221 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002222 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002223 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002224 qc->dma_dir = DMA_FROM_DEVICE;
2225
Tejun Heo6e7846e2006-02-12 23:32:58 +09002226 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002227 qc->cdb[0] = REQUEST_SENSE;
2228 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2229
2230 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2231 qc->tf.command = ATA_CMD_PACKET;
2232
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002233 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002234 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002235 qc->tf.feature |= ATAPI_PKT_DMA;
2236 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002237 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002238 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2239 qc->tf.lbah = 0;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002240 }
Jeff Garzika939c962005-10-05 17:09:16 -04002241 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2242
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002243 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002244
Tejun Heo8e0e6942006-03-31 20:41:11 +09002245 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002246
2247 DPRINTK("EXIT\n");
2248}
2249
Tejun Heo77853bf2006-01-23 13:09:36 +09002250static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251{
2252 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002253 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254
Jeff Garzika7dac442005-10-30 04:44:42 -05002255 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002256
Tejun Heo246619d2006-05-15 20:58:16 +09002257 /* handle completion from new EH */
2258 if (unlikely(qc->ap->ops->error_handler &&
2259 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2260
2261 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2262 /* FIXME: not quite right; we don't want the
2263 * translation of taskfile registers into a
2264 * sense descriptors, since that's only
2265 * correct for ATA, not ATAPI
2266 */
Tejun Heo750426a2006-11-14 22:37:35 +09002267 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002268 }
2269
Tejun Heo22aac082006-08-08 14:08:59 +09002270 /* SCSI EH automatically locks door if sdev->locked is
2271 * set. Sometimes door lock request continues to
2272 * fail, for example, when no media is present. This
2273 * creates a loop - SCSI EH issues door lock which
2274 * fails and gets invoked again to acquire sense data
2275 * for the failed command.
2276 *
2277 * If door lock fails, always clear sdev->locked to
2278 * avoid this infinite loop.
2279 */
2280 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2281 qc->dev->sdev->locked = 0;
2282
Tejun Heo246619d2006-05-15 20:58:16 +09002283 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2284 qc->scsidone(cmd);
2285 ata_qc_free(qc);
2286 return;
2287 }
2288
2289 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002290 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002292 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002293 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002294 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002295 /* FIXME: not quite right; we don't want the
2296 * translation of taskfile registers into
2297 * a sense descriptors, since that's only
2298 * correct for ATA, not ATAPI
2299 */
Tejun Heo750426a2006-11-14 22:37:35 +09002300 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002301 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302 u8 *scsicmd = cmd->cmnd;
2303
Tony Battersbyfd71da42005-12-21 16:35:44 -05002304 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Jeff Garzikb445c562008-02-29 19:10:51 -05002305 unsigned long flags;
Tejun Heo87340e92008-04-28 17:48:51 +09002306 u8 *buf;
Jeff Garzikb445c562008-02-29 19:10:51 -05002307
Tejun Heo87340e92008-04-28 17:48:51 +09002308 buf = ata_scsi_rbuf_get(cmd, true, &flags);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002309
2310 /* ATAPI devices typically report zero for their SCSI version,
2311 * and sometimes deviate from the spec WRT response data
2312 * format. If SCSI version is reported as zero like normal,
2313 * then we make the following fixups: 1) Fake MMC-5 version,
2314 * to indicate to the Linux scsi midlayer this is a modern
2315 * device. 2) Ensure response data format / ATAPI information
2316 * are always correct.
2317 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002318 if (buf[2] == 0) {
2319 buf[2] = 0x5;
2320 buf[3] = 0x32;
2321 }
2322
Tejun Heo87340e92008-04-28 17:48:51 +09002323 ata_scsi_rbuf_put(cmd, true, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002325
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 cmd->result = SAM_STAT_GOOD;
2327 }
2328
2329 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002330 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331}
2332/**
2333 * atapi_xlat - Initialize PACKET taskfile
2334 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335 *
2336 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002337 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338 *
2339 * RETURNS:
2340 * Zero on success, non-zero on failure.
2341 */
Tejun Heoad706992006-12-17 10:45:57 +09002342static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343{
Tejun Heo542b1442006-12-17 10:45:08 +09002344 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 struct ata_device *dev = qc->dev;
Tejun Heo542b1442006-12-17 10:45:08 +09002346 int nodata = (scmd->sc_data_direction == DMA_NONE);
Tejun Heo5895ef92008-06-17 12:36:26 +09002347 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
Alan Cox2db78dd2007-10-02 13:53:04 -07002348 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349
Tejun Heo2e5704f2006-12-17 10:46:33 +09002350 memset(qc->cdb, 0, dev->cdb_len);
2351 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352
2353 qc->complete_fn = atapi_qc_complete;
2354
2355 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002356 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 qc->tf.flags |= ATA_TFLAG_WRITE;
2358 DPRINTK("direction: write\n");
2359 }
2360
2361 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002362 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002364 /* check whether ATAPI DMA is safe */
Tejun Heo5895ef92008-06-17 12:36:26 +09002365 if (!nodata && !using_pio && atapi_check_dma(qc))
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002366 using_pio = 1;
2367
Tejun Heoe1902222007-11-26 20:58:02 +09002368 /* Some controller variants snoop this value for Packet
2369 * transfers to do state machine and FIFO management. Thus we
2370 * want to set it properly, and for DMA where it is
2371 * effectively meaningless.
2372 */
Tejun Heoaacda372008-03-18 17:47:43 +09002373 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002374
Tejun Heoe1902222007-11-26 20:58:02 +09002375 /* Most ATAPI devices which honor transfer chunk size don't
2376 * behave according to the spec when odd chunk size which
2377 * matches the transfer length is specified. If the number of
2378 * bytes to transfer is 2n+1. According to the spec, what
2379 * should happen is to indicate that 2n+1 is going to be
2380 * transferred and transfer 2n+2 bytes where the last byte is
2381 * padding.
2382 *
2383 * In practice, this doesn't happen. ATAPI devices first
2384 * indicate and transfer 2n bytes and then indicate and
2385 * transfer 2 bytes where the last byte is padding.
2386 *
2387 * This inconsistency confuses several controllers which
2388 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2389 * These controllers use actual number of transferred bytes to
2390 * update DMA poitner and transfer of 4n+2 bytes make those
2391 * controller push DMA pointer by 4n+4 bytes because SATA data
2392 * FISes are aligned to 4 bytes. This causes data corruption
2393 * and buffer overrun.
2394 *
2395 * Always setting nbytes to even number solves this problem
2396 * because then ATAPI devices don't have to split data at 2n
2397 * boundaries.
2398 */
2399 if (nbytes & 0x1)
2400 nbytes++;
2401
Alan Cox2db78dd2007-10-02 13:53:04 -07002402 qc->tf.lbam = (nbytes & 0xFF);
2403 qc->tf.lbah = (nbytes >> 8);
2404
Tejun Heo5895ef92008-06-17 12:36:26 +09002405 if (nodata)
2406 qc->tf.protocol = ATAPI_PROT_NODATA;
2407 else if (using_pio)
2408 qc->tf.protocol = ATAPI_PROT_PIO;
2409 else {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002410 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002411 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 qc->tf.feature |= ATAPI_PKT_DMA;
2413
Tejun Heo91163002008-02-21 13:25:50 +09002414 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2415 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002416 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 }
2419
Alan Cox2db78dd2007-10-02 13:53:04 -07002420
2421 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2422 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 return 0;
2424}
2425
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002426static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002427{
Tejun Heo071f44b2008-04-07 22:47:22 +09002428 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002429 if (likely(devno < ata_link_max_devices(&ap->link)))
2430 return &ap->link.device[devno];
2431 } else {
2432 if (likely(devno < ap->nr_pmp_links))
2433 return &ap->pmp_link[devno].device[0];
2434 }
2435
Tejun Heoab5b3a52006-05-31 18:27:34 +09002436 return NULL;
2437}
2438
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002439static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2440 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002441{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002442 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002443
Tejun Heo41bda9c2007-08-06 18:36:24 +09002444 /* skip commands not addressed to targets we simulate */
Tejun Heo071f44b2008-04-07 22:47:22 +09002445 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09002446 if (unlikely(scsidev->channel || scsidev->lun))
2447 return NULL;
2448 devno = scsidev->id;
2449 } else {
2450 if (unlikely(scsidev->id || scsidev->lun))
2451 return NULL;
2452 devno = scsidev->channel;
2453 }
2454
2455 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002456}
2457
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458/**
Brian King99ba9e02006-06-12 14:54:17 -05002459 * ata_scsi_dev_enabled - determine if device is enabled
2460 * @dev: ATA device
2461 *
2462 * Determine if commands should be sent to the specified device.
2463 *
2464 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002465 * spin_lock_irqsave(host lock)
Brian King99ba9e02006-06-12 14:54:17 -05002466 *
2467 * RETURNS:
2468 * 0 if commands are not allowed / 1 if commands are allowed
2469 */
2470
2471static int ata_scsi_dev_enabled(struct ata_device *dev)
2472{
2473 if (unlikely(!ata_dev_enabled(dev)))
2474 return 0;
2475
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002476 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
Brian King99ba9e02006-06-12 14:54:17 -05002477 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2478 ata_dev_printk(dev, KERN_WARNING,
2479 "WARNING: ATAPI is %s, device ignored.\n",
2480 atapi_enabled ? "not supported with this driver" : "disabled");
2481 return 0;
2482 }
2483 }
2484
2485 return 1;
2486}
2487
2488/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2490 * @ap: ATA port to which the device is attached
2491 * @scsidev: SCSI device from which we derive the ATA device
2492 *
2493 * Given various information provided in struct scsi_cmnd,
2494 * map that onto an ATA bus, and using that mapping
2495 * determine which ata_device is associated with the
2496 * SCSI command to be sent.
2497 *
2498 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002499 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500 *
2501 * RETURNS:
2502 * Associated ATA device, or %NULL if not found.
2503 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002505ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002507 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508
Brian King99ba9e02006-06-12 14:54:17 -05002509 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510 return NULL;
2511
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 return dev;
2513}
2514
Jeff Garzikb0955182005-05-12 15:45:22 -04002515/*
2516 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2517 * @byte1: Byte 1 from pass-thru CDB.
2518 *
2519 * RETURNS:
2520 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2521 */
2522static u8
2523ata_scsi_map_proto(u8 byte1)
2524{
2525 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002526 case 3: /* Non-data */
2527 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002528
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002529 case 6: /* DMA */
2530 case 10: /* UDMA Data-in */
2531 case 11: /* UDMA Data-Out */
2532 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002533
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002534 case 4: /* PIO Data-in */
2535 case 5: /* PIO Data-out */
2536 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002537
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002538 case 0: /* Hard Reset */
2539 case 1: /* SRST */
2540 case 8: /* Device Diagnostic */
2541 case 9: /* Device Reset */
2542 case 7: /* DMA Queued */
2543 case 12: /* FPDMA */
2544 case 15: /* Return Response Info */
2545 default: /* Reserved */
2546 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002547 }
2548
2549 return ATA_PROT_UNKNOWN;
2550}
2551
2552/**
2553 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2554 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002555 *
2556 * Handles either 12 or 16-byte versions of the CDB.
2557 *
2558 * RETURNS:
2559 * Zero on success, non-zero on failure.
2560 */
Tejun Heoad706992006-12-17 10:45:57 +09002561static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002562{
2563 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002564 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002565 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002566 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002567
Tejun Heo542b1442006-12-17 10:45:08 +09002568 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002569 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002570
Alan Coxae8d4ee2007-11-04 22:05:49 -05002571 /*
2572 * Filter TPM commands by default. These provide an
2573 * essentially uncontrolled encrypted "back door" between
2574 * applications and the disk. Set libata.allow_tpm=1 if you
2575 * have a real reason for wanting to use them. This ensures
2576 * that installed software cannot easily mess stuff up without
2577 * user intent. DVR type users will probably ship with this enabled
2578 * for movie content management.
2579 *
2580 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2581 * for this and should do in future but that it is not sufficient as
2582 * DCS is an optional feature set. Thus we also do the software filter
2583 * so that we comply with the TC consortium stated goal that the user
2584 * can turn off TC features of their system.
2585 */
2586 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2587 goto invalid_fld;
2588
Alan Coxf79d4092006-05-22 16:55:11 +01002589 /* We may not issue DMA commands if no DMA mode is set */
2590 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2591 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002592
2593 /*
2594 * 12 and 16 byte CDBs use different offsets to
2595 * provide the various register values.
2596 */
Tejun Heo542b1442006-12-17 10:45:08 +09002597 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002598 /*
2599 * 16-byte CDB - may contain extended commands.
2600 *
2601 * If that is the case, copy the upper byte register values.
2602 */
Tejun Heo542b1442006-12-17 10:45:08 +09002603 if (cdb[1] & 0x01) {
2604 tf->hob_feature = cdb[3];
2605 tf->hob_nsect = cdb[5];
2606 tf->hob_lbal = cdb[7];
2607 tf->hob_lbam = cdb[9];
2608 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002609 tf->flags |= ATA_TFLAG_LBA48;
2610 } else
2611 tf->flags &= ~ATA_TFLAG_LBA48;
2612
2613 /*
2614 * Always copy low byte, device and command registers.
2615 */
Tejun Heo542b1442006-12-17 10:45:08 +09002616 tf->feature = cdb[4];
2617 tf->nsect = cdb[6];
2618 tf->lbal = cdb[8];
2619 tf->lbam = cdb[10];
2620 tf->lbah = cdb[12];
2621 tf->device = cdb[13];
2622 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002623 } else {
2624 /*
2625 * 12-byte CDB - incapable of extended commands.
2626 */
2627 tf->flags &= ~ATA_TFLAG_LBA48;
2628
Tejun Heo542b1442006-12-17 10:45:08 +09002629 tf->feature = cdb[3];
2630 tf->nsect = cdb[4];
2631 tf->lbal = cdb[5];
2632 tf->lbam = cdb[6];
2633 tf->lbah = cdb[7];
2634 tf->device = cdb[8];
2635 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002636 }
Albert Leefa4453c2007-06-07 15:52:07 +08002637
2638 /* enforce correct master/slave bit */
2639 tf->device = dev->devno ?
2640 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002641
Albert Lee1dce5892007-06-07 15:49:22 +08002642 /* sanity check for pio multi commands */
2643 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2644 goto invalid_fld;
2645
2646 if (is_multi_taskfile(tf)) {
2647 unsigned int multi_count = 1 << (cdb[1] >> 5);
2648
2649 /* compare the passed through multi_count
2650 * with the cached multi_count of libata
2651 */
2652 if (multi_count != dev->multi_count)
2653 ata_dev_printk(dev, KERN_WARNING,
2654 "invalid multi_count %u ignored\n",
2655 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002656 }
Albert Lee1dce5892007-06-07 15:49:22 +08002657
Mark Lord5a5dbd12007-03-16 10:22:26 -04002658 /* READ/WRITE LONG use a non-standard sect_size */
2659 qc->sect_size = ATA_SECT_SIZE;
2660 switch (tf->command) {
2661 case ATA_CMD_READ_LONG:
2662 case ATA_CMD_READ_LONG_ONCE:
2663 case ATA_CMD_WRITE_LONG:
2664 case ATA_CMD_WRITE_LONG_ONCE:
2665 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2666 goto invalid_fld;
Boaz Harrosh71201652007-09-18 17:48:50 +02002667 qc->sect_size = scsi_bufflen(scmd);
Mark Lord5a5dbd12007-03-16 10:22:26 -04002668 }
2669
Jeff Garzikb0955182005-05-12 15:45:22 -04002670 /*
2671 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2672 * SET_FEATURES - XFER MODE must be preceded/succeeded
2673 * by an update to hardware-specific registers for each
2674 * controller (i.e. the reason for ->set_piomode(),
2675 * ->set_dmamode(), and ->post_set_mode() hooks).
2676 */
2677 if ((tf->command == ATA_CMD_SET_FEATURES)
2678 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002679 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002680
2681 /*
2682 * Set flags so that all registers will be written,
2683 * and pass on write indication (used for PIO/DMA
2684 * setup.)
2685 */
2686 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2687
Tejun Heo542b1442006-12-17 10:45:08 +09002688 if (scmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002689 tf->flags |= ATA_TFLAG_WRITE;
2690
2691 /*
2692 * Set transfer length.
2693 *
2694 * TODO: find out if we need to do more here to
2695 * cover scatter/gather case.
2696 */
Tejun Heoaacda372008-03-18 17:47:43 +09002697 ata_qc_set_pc_nbytes(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04002698
Tejun Heoe027bd32007-10-26 16:19:26 +09002699 /* request result TF and be quiet about device error */
2700 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
Tejun Heoe61e0672006-05-15 20:57:40 +09002701
Jeff Garzikb0955182005-05-12 15:45:22 -04002702 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002703
2704 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002705 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002706 /* "Invalid field in cdb" */
2707 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002708}
2709
Linus Torvalds1da177e2005-04-16 15:20:36 -07002710/**
2711 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2712 * @dev: ATA device
2713 * @cmd: SCSI command opcode to consider
2714 *
2715 * Look up the SCSI command given, and determine whether the
2716 * SCSI command is to be translated or simulated.
2717 *
2718 * RETURNS:
2719 * Pointer to translation function if possible, %NULL if not.
2720 */
2721
2722static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2723{
2724 switch (cmd) {
2725 case READ_6:
2726 case READ_10:
2727 case READ_16:
2728
2729 case WRITE_6:
2730 case WRITE_10:
2731 case WRITE_16:
2732 return ata_scsi_rw_xlat;
2733
2734 case SYNCHRONIZE_CACHE:
2735 if (ata_try_flush_cache(dev))
2736 return ata_scsi_flush_xlat;
2737 break;
2738
2739 case VERIFY:
2740 case VERIFY_16:
2741 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002742
2743 case ATA_12:
2744 case ATA_16:
2745 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002746
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002747 case START_STOP:
2748 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002749 }
2750
2751 return NULL;
2752}
2753
2754/**
2755 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2756 * @ap: ATA port to which the command was being sent
2757 * @cmd: SCSI command to dump
2758 *
2759 * Prints the contents of a SCSI command via printk().
2760 */
2761
2762static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2763 struct scsi_cmnd *cmd)
2764{
2765#ifdef ATA_DEBUG
2766 struct scsi_device *scsidev = cmd->device;
2767 u8 *scsicmd = cmd->cmnd;
2768
2769 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09002770 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 scsidev->channel, scsidev->id, scsidev->lun,
2772 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2773 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2774 scsicmd[8]);
2775#endif
2776}
2777
Tejun Heo542b1442006-12-17 10:45:08 +09002778static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09002779 void (*done)(struct scsi_cmnd *),
2780 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06002781{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002782 u8 scsi_op = scmd->cmnd[0];
2783 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09002784 int rc = 0;
2785
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002786 if (dev->class == ATA_DEV_ATA) {
2787 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2788 goto bad_cdb_len;
2789
2790 xlat_func = ata_get_xlat_func(dev, scsi_op);
2791 } else {
2792 if (unlikely(!scmd->cmd_len))
2793 goto bad_cdb_len;
2794
2795 xlat_func = NULL;
2796 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2797 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09002798 int len = COMMAND_SIZE(scsi_op);
2799 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002800 goto bad_cdb_len;
2801
2802 xlat_func = atapi_xlat;
2803 } else {
2804 /* ATA_16 passthru, treat as an ATA command */
2805 if (unlikely(scmd->cmd_len > 16))
2806 goto bad_cdb_len;
2807
2808 xlat_func = ata_get_xlat_func(dev, scsi_op);
2809 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09002810 }
2811
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002812 if (xlat_func)
2813 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2814 else
2815 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09002816
2817 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002818
2819 bad_cdb_len:
2820 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2821 scmd->cmd_len, scsi_op, dev->cdb_len);
2822 scmd->result = DID_ERROR << 16;
2823 done(scmd);
2824 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06002825}
2826
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827/**
2828 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2829 * @cmd: SCSI command to be sent
2830 * @done: Completion function, called when command is complete
2831 *
2832 * In some cases, this function translates SCSI commands into
2833 * ATA taskfiles, and queues the taskfiles to be sent to
2834 * hardware. In other cases, this function simulates a
2835 * SCSI device by evaluating and responding to certain
2836 * SCSI commands. This creates the overall effect of
2837 * ATA and ATAPI devices appearing as SCSI devices.
2838 *
2839 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002840 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841 *
2842 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09002843 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2844 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002846int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2847{
2848 struct ata_port *ap;
2849 struct ata_device *dev;
2850 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05002851 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09002852 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853
Jeff Garzik35bb94b2006-04-11 13:12:34 -04002854 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002855
2856 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04002857 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858
2859 ata_scsi_dump_cdb(ap, cmd);
2860
2861 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002862 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09002863 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002864 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865 cmd->result = (DID_BAD_TARGET << 16);
2866 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867 }
2868
Jeff Garzikba6a1302006-06-22 23:46:10 -04002869 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002870 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09002871 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872}
2873
2874/**
2875 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002876 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877 * @cmd: SCSI command being sent to device.
2878 * @done: SCSI command completion function.
2879 *
2880 * Interprets and directly executes a select list of SCSI commands
2881 * that can be handled internally.
2882 *
2883 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002884 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 */
2886
Tejun Heo3373efd2006-05-15 20:57:53 +09002887void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002888 void (*done)(struct scsi_cmnd *))
2889{
2890 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04002891 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04002892 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002894 args.dev = dev;
2895 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002896 args.cmd = cmd;
2897 args.done = done;
2898
2899 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002900 /* TODO: worth improving? */
2901 case FORMAT_UNIT:
2902 ata_scsi_invalid_field(cmd, done);
2903 break;
2904
2905 case INQUIRY:
2906 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04002907 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002908 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2909 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2910 else switch (scsicmd[2]) {
2911 case 0x00:
2912 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002913 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002914 case 0x80:
2915 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002917 case 0x83:
2918 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002920 case 0x89:
2921 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002922 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002923 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002924 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002926 }
2927 break;
2928
2929 case MODE_SENSE:
2930 case MODE_SENSE_10:
2931 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2932 break;
2933
2934 case MODE_SELECT: /* unconditionally return */
2935 case MODE_SELECT_10: /* bad-field-in-cdb */
2936 ata_scsi_invalid_field(cmd, done);
2937 break;
2938
2939 case READ_CAPACITY:
2940 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2941 break;
2942
2943 case SERVICE_ACTION_IN:
2944 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2945 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2946 else
2947 ata_scsi_invalid_field(cmd, done);
2948 break;
2949
2950 case REPORT_LUNS:
2951 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2952 break;
2953
2954 case REQUEST_SENSE:
2955 ata_scsi_set_sense(cmd, 0, 0, 0);
2956 cmd->result = (DRIVER_SENSE << 24);
2957 done(cmd);
2958 break;
2959
2960 /* if we reach this, then writeback caching is disabled,
2961 * turning this into a no-op.
2962 */
2963 case SYNCHRONIZE_CACHE:
2964 /* fall through */
2965
2966 /* no-op's, complete with success */
2967 case REZERO_UNIT:
2968 case SEEK_6:
2969 case SEEK_10:
2970 case TEST_UNIT_READY:
2971 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2972 break;
2973
2974 case SEND_DIAGNOSTIC:
2975 tmp8 = scsicmd[1] & ~(1 << 3);
2976 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2977 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2978 else
2979 ata_scsi_invalid_field(cmd, done);
2980 break;
2981
2982 /* all other commands */
2983 default:
2984 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2985 /* "Invalid command operation code" */
2986 done(cmd);
2987 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002988 }
2989}
2990
Tejun Heof3187192007-04-17 23:44:07 +09002991int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
2992{
2993 int i, rc;
2994
2995 for (i = 0; i < host->n_ports; i++) {
2996 struct ata_port *ap = host->ports[i];
2997 struct Scsi_Host *shost;
2998
2999 rc = -ENOMEM;
3000 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3001 if (!shost)
3002 goto err_alloc;
3003
3004 *(struct ata_port **)&shost->hostdata[0] = ap;
3005 ap->scsi_host = shost;
3006
3007 shost->transportt = &ata_scsi_transport_template;
3008 shost->unique_id = ap->print_id;
3009 shost->max_id = 16;
3010 shost->max_lun = 1;
3011 shost->max_channel = 1;
3012 shost->max_cmd_len = 16;
3013
Tejun Heo31cc23b2007-09-23 13:14:12 +09003014 /* Schedule policy is determined by ->qc_defer()
3015 * callback and it needs to see every deferred qc.
3016 * Set host_blocked to 1 to prevent SCSI midlayer from
3017 * automatically deferring requests.
3018 */
3019 shost->max_host_blocked = 1;
3020
Tejun Heof3187192007-04-17 23:44:07 +09003021 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3022 if (rc)
3023 goto err_add;
3024 }
3025
3026 return 0;
3027
3028 err_add:
3029 scsi_host_put(host->ports[i]->scsi_host);
3030 err_alloc:
3031 while (--i >= 0) {
3032 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3033
3034 scsi_remove_host(shost);
3035 scsi_host_put(shost);
3036 }
3037 return rc;
3038}
3039
Tejun Heo1ae46312007-07-16 14:29:40 +09003040void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003041{
Tejun Heo1ae46312007-07-16 14:29:40 +09003042 int tries = 5;
3043 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003044 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003045 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003046
Tejun Heo198e0fe2006-04-02 18:51:52 +09003047 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003048 return;
3049
Tejun Heo1ae46312007-07-16 14:29:40 +09003050 repeat:
Tejun Heo41bda9c2007-08-06 18:36:24 +09003051 ata_port_for_each_link(link, ap) {
3052 ata_link_for_each_dev(dev, link) {
3053 struct scsi_device *sdev;
3054 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003055
Tejun Heo41bda9c2007-08-06 18:36:24 +09003056 if (!ata_dev_enabled(dev) || dev->sdev)
3057 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003058
Tejun Heo41bda9c2007-08-06 18:36:24 +09003059 if (ata_is_host_link(link))
3060 id = dev->devno;
3061 else
3062 channel = link->pmp;
3063
3064 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3065 NULL);
3066 if (!IS_ERR(sdev)) {
3067 dev->sdev = sdev;
3068 scsi_device_put(sdev);
3069 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003070 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003071 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003072
3073 /* If we scanned while EH was in progress or allocation
3074 * failure occurred, scan would have failed silently. Check
3075 * whether all devices are attached.
3076 */
Tejun Heo41bda9c2007-08-06 18:36:24 +09003077 ata_port_for_each_link(link, ap) {
3078 ata_link_for_each_dev(dev, link) {
3079 if (ata_dev_enabled(dev) && !dev->sdev)
3080 goto exit_loop;
3081 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003082 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003083 exit_loop:
3084 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003085 return;
3086
3087 /* we're missing some SCSI devices */
3088 if (sync) {
3089 /* If caller requested synchrnous scan && we've made
3090 * any progress, sleep briefly and repeat.
3091 */
3092 if (dev != last_failed_dev) {
3093 msleep(100);
3094 last_failed_dev = dev;
3095 goto repeat;
3096 }
3097
3098 /* We might be failing to detect boot device, give it
3099 * a few more chances.
3100 */
3101 if (--tries) {
3102 msleep(100);
3103 goto repeat;
3104 }
3105
3106 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3107 "failed without making any progress,\n"
3108 " switching to async\n");
3109 }
3110
3111 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3112 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003113}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003114
3115/**
3116 * ata_scsi_offline_dev - offline attached SCSI device
3117 * @dev: ATA device to offline attached SCSI device for
3118 *
3119 * This function is called from ata_eh_hotplug() and responsible
3120 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003121 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003122 * against clearing.
3123 *
3124 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003125 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003126 *
3127 * RETURNS:
3128 * 1 if attached SCSI device exists, 0 otherwise.
3129 */
3130int ata_scsi_offline_dev(struct ata_device *dev)
3131{
3132 if (dev->sdev) {
3133 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3134 return 1;
3135 }
3136 return 0;
3137}
Tejun Heo580b2102006-05-31 18:28:05 +09003138
3139/**
3140 * ata_scsi_remove_dev - remove attached SCSI device
3141 * @dev: ATA device to remove attached SCSI device for
3142 *
3143 * This function is called from ata_eh_scsi_hotplug() and
3144 * responsible for removing the SCSI device attached to @dev.
3145 *
3146 * LOCKING:
3147 * Kernel thread context (may sleep).
3148 */
3149static void ata_scsi_remove_dev(struct ata_device *dev)
3150{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003151 struct ata_port *ap = dev->link->ap;
Tejun Heo580b2102006-05-31 18:28:05 +09003152 struct scsi_device *sdev;
3153 unsigned long flags;
3154
3155 /* Alas, we need to grab scan_mutex to ensure SCSI device
3156 * state doesn't change underneath us and thus
3157 * scsi_device_get() always succeeds. The mutex locking can
3158 * be removed if there is __scsi_device_get() interface which
3159 * increments reference counts regardless of device state.
3160 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003161 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003162 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003163
Jeff Garzikcca39742006-08-24 03:19:22 -04003164 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b2102006-05-31 18:28:05 +09003165 sdev = dev->sdev;
3166 dev->sdev = NULL;
3167
3168 if (sdev) {
3169 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003170 * away underneath us after the host lock and
Tejun Heo580b2102006-05-31 18:28:05 +09003171 * scan_mutex are released. Hold onto it.
3172 */
3173 if (scsi_device_get(sdev) == 0) {
3174 /* The following ensures the attached sdev is
3175 * offline on return from ata_scsi_offline_dev()
3176 * regardless it wins or loses the race
3177 * against this function.
3178 */
3179 scsi_device_set_state(sdev, SDEV_OFFLINE);
3180 } else {
3181 WARN_ON(1);
3182 sdev = NULL;
3183 }
3184 }
3185
Jeff Garzikba6a1302006-06-22 23:46:10 -04003186 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003187 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003188
3189 if (sdev) {
3190 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3191 sdev->sdev_gendev.bus_id);
3192
3193 scsi_remove_device(sdev);
3194 scsi_device_put(sdev);
3195 }
3196}
3197
Tejun Heo41bda9c2007-08-06 18:36:24 +09003198static void ata_scsi_handle_link_detach(struct ata_link *link)
3199{
3200 struct ata_port *ap = link->ap;
3201 struct ata_device *dev;
3202
3203 ata_link_for_each_dev(dev, link) {
3204 unsigned long flags;
3205
3206 if (!(dev->flags & ATA_DFLAG_DETACHED))
3207 continue;
3208
3209 spin_lock_irqsave(ap->lock, flags);
3210 dev->flags &= ~ATA_DFLAG_DETACHED;
3211 spin_unlock_irqrestore(ap->lock, flags);
3212
3213 ata_scsi_remove_dev(dev);
3214 }
3215}
3216
Tejun Heo580b2102006-05-31 18:28:05 +09003217/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003218 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003219 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003220 *
3221 * Tell the block layer to send a media change notification
3222 * event.
3223 *
3224 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003225 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003226 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003227void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003228{
Tejun Heo854c73a2007-09-23 13:14:11 +09003229 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003230 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3231 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003232}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003233
3234/**
Tejun Heo580b2102006-05-31 18:28:05 +09003235 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003236 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b2102006-05-31 18:28:05 +09003237 *
3238 * Perform SCSI part of hotplug. It's executed from a separate
3239 * workqueue after EH completes. This is necessary because SCSI
3240 * hot plugging requires working EH and hot unplugging is
3241 * synchronized with hot plugging with a mutex.
3242 *
3243 * LOCKING:
3244 * Kernel thread context (may sleep).
3245 */
David Howells65f27f32006-11-22 14:55:48 +00003246void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b2102006-05-31 18:28:05 +09003247{
David Howells65f27f32006-11-22 14:55:48 +00003248 struct ata_port *ap =
3249 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003250 int i;
Tejun Heo580b2102006-05-31 18:28:05 +09003251
Tejun Heob51e9e52006-06-29 01:29:30 +09003252 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b2102006-05-31 18:28:05 +09003253 DPRINTK("ENTER/EXIT - unloading\n");
3254 return;
3255 }
3256
3257 DPRINTK("ENTER\n");
3258
Tejun Heo41bda9c2007-08-06 18:36:24 +09003259 /* Unplug detached devices. We cannot use link iterator here
3260 * because PMP links have to be scanned even if PMP is
3261 * currently not attached. Iterate manually.
3262 */
3263 ata_scsi_handle_link_detach(&ap->link);
3264 if (ap->pmp_link)
3265 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3266 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b2102006-05-31 18:28:05 +09003267
3268 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003269 ata_scsi_scan_host(ap, 0);
Tejun Heo580b2102006-05-31 18:28:05 +09003270
3271 DPRINTK("EXIT\n");
3272}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003273
3274/**
3275 * ata_scsi_user_scan - indication for user-initiated bus scan
3276 * @shost: SCSI host to scan
3277 * @channel: Channel to scan
3278 * @id: ID to scan
3279 * @lun: LUN to scan
3280 *
3281 * This function is called when user explicitly requests bus
3282 * scan. Set probe pending flag and invoke EH.
3283 *
3284 * LOCKING:
3285 * SCSI layer (we don't care)
3286 *
3287 * RETURNS:
3288 * Zero.
3289 */
3290static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3291 unsigned int id, unsigned int lun)
3292{
3293 struct ata_port *ap = ata_shost_to_port(shost);
3294 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003295 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003296
3297 if (!ap->ops->error_handler)
3298 return -EOPNOTSUPP;
3299
Tejun Heo41bda9c2007-08-06 18:36:24 +09003300 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003301 return -EINVAL;
3302
Tejun Heo071f44b2008-04-07 22:47:22 +09003303 if (!sata_pmp_attached(ap)) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003304 if (channel != SCAN_WILD_CARD && channel)
3305 return -EINVAL;
3306 devno = id;
3307 } else {
3308 if (id != SCAN_WILD_CARD && id)
3309 return -EINVAL;
3310 devno = channel;
3311 }
3312
Jeff Garzikba6a1302006-06-22 23:46:10 -04003313 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003314
Tejun Heo41bda9c2007-08-06 18:36:24 +09003315 if (devno == SCAN_WILD_CARD) {
3316 struct ata_link *link;
3317
3318 ata_port_for_each_link(link, ap) {
3319 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003320 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003321 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003322 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003323 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003324 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003325
3326 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003327 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003328 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003329 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003330 } else
3331 rc = -EINVAL;
3332 }
3333
Tejun Heo309afcb2006-09-30 18:07:17 +09003334 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003335 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003336 spin_unlock_irqrestore(ap->lock, flags);
3337 ata_port_wait_eh(ap);
3338 } else
3339 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003340
3341 return rc;
3342}
zhao, forrest3057ac32006-06-12 12:01:34 +08003343
3344/**
Tejun Heod0171262006-06-12 22:51:14 +09003345 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003346 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003347 *
Tejun Heod0171262006-06-12 22:51:14 +09003348 * After ATA pass thru (SAT) commands are executed successfully,
3349 * libata need to propagate the changes to SCSI layer. This
3350 * function must be executed from ata_aux_wq such that sdev
3351 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003352 *
Tejun Heod0171262006-06-12 22:51:14 +09003353 * LOCKING:
3354 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003355 */
David Howells65f27f32006-11-22 14:55:48 +00003356void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003357{
David Howells65f27f32006-11-22 14:55:48 +00003358 struct ata_port *ap =
3359 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003360 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003361 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003362 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003363
Tejun Heof84e7e42006-11-22 11:21:31 +09003364 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003365
Tejun Heo41bda9c2007-08-06 18:36:24 +09003366 ata_port_for_each_link(link, ap) {
3367 ata_link_for_each_dev(dev, link) {
3368 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003369
Tejun Heo41bda9c2007-08-06 18:36:24 +09003370 if (!ata_dev_enabled(dev) || !sdev)
3371 continue;
3372 if (scsi_device_get(sdev))
3373 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003374
Tejun Heo41bda9c2007-08-06 18:36:24 +09003375 spin_unlock_irqrestore(ap->lock, flags);
3376 scsi_rescan_device(&(sdev->sdev_gendev));
3377 scsi_device_put(sdev);
3378 spin_lock_irqsave(ap->lock, flags);
3379 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003380 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003381
3382 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003383}
Brian King80289162006-08-07 14:27:31 -05003384
3385/**
3386 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003387 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003388 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003389 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003390 *
3391 * LOCKING:
3392 * PCI/etc. bus probe sem.
3393 *
3394 * RETURNS:
3395 * ata_port pointer on success / NULL on failure.
3396 */
3397
Jeff Garzikcca39742006-08-24 03:19:22 -04003398struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003399 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003400 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003401{
Tejun Heof3187192007-04-17 23:44:07 +09003402 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003403
Tejun Heof3187192007-04-17 23:44:07 +09003404 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003405 if (!ap)
3406 return NULL;
3407
Tejun Heof3187192007-04-17 23:44:07 +09003408 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003409 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003410 ap->pio_mask = port_info->pio_mask;
3411 ap->mwdma_mask = port_info->mwdma_mask;
3412 ap->udma_mask = port_info->udma_mask;
3413 ap->flags |= port_info->flags;
3414 ap->ops = port_info->port_ops;
3415 ap->cbl = ATA_CBL_SATA;
3416
Brian King80289162006-08-07 14:27:31 -05003417 return ap;
3418}
3419EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3420
3421/**
3422 * ata_sas_port_start - Set port up for dma.
3423 * @ap: Port to initialize
3424 *
3425 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003426 * initialized.
Brian King80289162006-08-07 14:27:31 -05003427 *
3428 * May be used as the port_start() entry in ata_port_operations.
3429 *
3430 * LOCKING:
3431 * Inherited from caller.
3432 */
3433int ata_sas_port_start(struct ata_port *ap)
3434{
James Bottomleydde20202008-02-19 11:36:56 +01003435 return 0;
Brian King80289162006-08-07 14:27:31 -05003436}
3437EXPORT_SYMBOL_GPL(ata_sas_port_start);
3438
3439/**
3440 * ata_port_stop - Undo ata_sas_port_start()
3441 * @ap: Port to shut down
3442 *
Brian King80289162006-08-07 14:27:31 -05003443 * May be used as the port_stop() entry in ata_port_operations.
3444 *
3445 * LOCKING:
3446 * Inherited from caller.
3447 */
3448
3449void ata_sas_port_stop(struct ata_port *ap)
3450{
Brian King80289162006-08-07 14:27:31 -05003451}
3452EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3453
3454/**
3455 * ata_sas_port_init - Initialize a SATA device
3456 * @ap: SATA port to initialize
3457 *
3458 * LOCKING:
3459 * PCI/etc. bus probe sem.
3460 *
3461 * RETURNS:
3462 * Zero on success, non-zero on error.
3463 */
3464
3465int ata_sas_port_init(struct ata_port *ap)
3466{
3467 int rc = ap->ops->port_start(ap);
3468
Tejun Heof3187192007-04-17 23:44:07 +09003469 if (!rc) {
3470 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003471 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003472 }
Brian King80289162006-08-07 14:27:31 -05003473
3474 return rc;
3475}
3476EXPORT_SYMBOL_GPL(ata_sas_port_init);
3477
3478/**
3479 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3480 * @ap: SATA port to destroy
3481 *
3482 */
3483
3484void ata_sas_port_destroy(struct ata_port *ap)
3485{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003486 if (ap->ops->port_stop)
3487 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003488 kfree(ap);
3489}
3490EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3491
3492/**
3493 * ata_sas_slave_configure - Default slave_config routine for libata devices
3494 * @sdev: SCSI device to configure
3495 * @ap: ATA port to which SCSI device is attached
3496 *
3497 * RETURNS:
3498 * Zero.
3499 */
3500
3501int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3502{
3503 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003504 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003505 return 0;
3506}
3507EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3508
3509/**
3510 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3511 * @cmd: SCSI command to be sent
3512 * @done: Completion function, called when command is complete
3513 * @ap: ATA port to which the command is being sent
3514 *
3515 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003516 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3517 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003518 */
3519
3520int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3521 struct ata_port *ap)
3522{
Brian King08475a12006-11-20 13:51:56 -06003523 int rc = 0;
3524
Brian King80289162006-08-07 14:27:31 -05003525 ata_scsi_dump_cdb(ap, cmd);
3526
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003527 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3528 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003529 else {
3530 cmd->result = (DID_BAD_TARGET << 16);
3531 done(cmd);
3532 }
Brian King08475a12006-11-20 13:51:56 -06003533 return rc;
Brian King80289162006-08-07 14:27:31 -05003534}
3535EXPORT_SYMBOL_GPL(ata_sas_queuecmd);