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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
Jeff Garzikb0955182005-05-12 15:45:22 -040052#define SECTOR_SIZE 512
53
Tejun Heoad706992006-12-17 10:45:57 +090054typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
Tejun Heoab5b3a52006-05-31 18:27:34 +090055
Jeff Garzik2dcb4072007-10-19 06:42:56 -040056static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090057 const struct scsi_device *scsidev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -040058static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
Tejun Heoab5b3a52006-05-31 18:27:34 +090059 const struct scsi_device *scsidev);
Tejun Heo83c47bc2006-05-31 18:28:07 +090060static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
Tejun Heoab5b3a52006-05-31 18:27:34 +090062
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040064#define RW_RECOVERY_MPAGE 0x1
65#define RW_RECOVERY_MPAGE_LEN 12
66#define CACHE_MPAGE 0x8
67#define CACHE_MPAGE_LEN 20
68#define CONTROL_MPAGE 0xa
69#define CONTROL_MPAGE_LEN 12
70#define ALL_MPAGES 0x3f
71#define ALL_SUB_MPAGES 0xff
72
73
Jeff Garzik24f75682007-09-21 07:54:49 -040074static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040075 RW_RECOVERY_MPAGE,
76 RW_RECOVERY_MPAGE_LEN - 2,
Jeff Garzik24f75682007-09-21 07:54:49 -040077 (1 << 7), /* AWRE */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -040078 0, /* read retry count */
79 0, 0, 0, 0,
80 0, /* write retry count */
81 0, 0, 0
82};
83
84static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
85 CACHE_MPAGE,
86 CACHE_MPAGE_LEN - 2,
87 0, /* contains WCE, needs to be 0 for logic */
88 0, 0, 0, 0, 0, 0, 0, 0, 0,
89 0, /* contains DRA, needs to be 0 for logic */
90 0, 0, 0, 0, 0, 0, 0
91};
92
93static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
94 CONTROL_MPAGE,
95 CONTROL_MPAGE_LEN - 2,
96 2, /* DSENSE=0, GLTSD=1 */
97 0, /* [QAM+QERR may be 1, see 05-359r1] */
98 0, 0, 0, 0, 0xff, 0xff,
99 0, 30 /* extended self test time, see 05-359r1 */
100};
101
Tejun Heo30afc842006-03-18 18:40:14 +0900102/*
103 * libata transport template. libata doesn't do real transport stuff.
104 * It just needs the eh_timed_out hook.
105 */
Tejun Heof3187192007-04-17 23:44:07 +0900106static struct scsi_transport_template ata_scsi_transport_template = {
Christoph Hellwig9227c332006-04-01 19:21:04 +0200107 .eh_strategy_handler = ata_scsi_error,
Tejun Heo30afc842006-03-18 18:40:14 +0900108 .eh_timed_out = ata_scsi_timed_out,
Tejun Heoccf68c32006-05-31 18:28:09 +0900109 .user_scan = ata_scsi_user_scan,
Tejun Heo30afc842006-03-18 18:40:14 +0900110};
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400113static const struct {
114 enum link_pm value;
115 const char *name;
116} link_pm_policy[] = {
117 { NOT_AVAILABLE, "max_performance" },
118 { MIN_POWER, "min_power" },
119 { MAX_PERFORMANCE, "max_performance" },
120 { MEDIUM_POWER, "medium_power" },
121};
122
Adrian Bunka2d6ed12007-10-31 00:50:23 +0100123static const char *ata_scsi_lpm_get(enum link_pm policy)
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400124{
125 int i;
126
127 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
128 if (link_pm_policy[i].value == policy)
129 return link_pm_policy[i].name;
130
131 return NULL;
132}
133
134static ssize_t ata_scsi_lpm_put(struct class_device *class_dev,
135 const char *buf, size_t count)
136{
137 struct Scsi_Host *shost = class_to_shost(class_dev);
138 struct ata_port *ap = ata_shost_to_port(shost);
139 enum link_pm policy = 0;
140 int i;
141
142 /*
143 * we are skipping array location 0 on purpose - this
144 * is because a value of NOT_AVAILABLE is displayed
145 * to the user as max_performance, but when the user
146 * writes "max_performance", they actually want the
147 * value to match MAX_PERFORMANCE.
148 */
149 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
150 const int len = strlen(link_pm_policy[i].name);
151 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
152 buf[len] == '\n') {
153 policy = link_pm_policy[i].value;
154 break;
155 }
156 }
157 if (!policy)
158 return -EINVAL;
159
160 ata_lpm_schedule(ap, policy);
161 return count;
162}
163
164static ssize_t
165ata_scsi_lpm_show(struct class_device *class_dev, char *buf)
166{
167 struct Scsi_Host *shost = class_to_shost(class_dev);
168 struct ata_port *ap = ata_shost_to_port(shost);
169 const char *policy =
170 ata_scsi_lpm_get(ap->pm_policy);
171
172 if (!policy)
173 return -EINVAL;
174
175 return snprintf(buf, 23, "%s\n", policy);
176}
177CLASS_DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
178 ata_scsi_lpm_show, ata_scsi_lpm_put);
179EXPORT_SYMBOL_GPL(class_device_attr_link_power_management_policy);
180
Douglas Gilbertae006512005-10-09 09:09:35 -0400181static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
182 void (*done)(struct scsi_cmnd *))
183{
184 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
185 /* "Invalid field in cbd" */
186 done(cmd);
187}
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189/**
190 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
191 * @sdev: SCSI device for which BIOS geometry is to be determined
192 * @bdev: block device associated with @sdev
193 * @capacity: capacity of SCSI device
194 * @geom: location to which geometry will be output
195 *
196 * Generic bios head/sector/cylinder calculator
197 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
198 * mapping. Some situations may arise where the disk is not
199 * bootable if this is not used.
200 *
201 * LOCKING:
202 * Defined by the SCSI layer. We don't really care.
203 *
204 * RETURNS:
205 * Zero.
206 */
207int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
208 sector_t capacity, int geom[])
209{
210 geom[0] = 255;
211 geom[1] = 63;
212 sector_div(capacity, 255*63);
213 geom[2] = capacity;
214
215 return 0;
216}
217
Jeff Garzikb0955182005-05-12 15:45:22 -0400218/**
Tejun Heo5924b742007-01-02 20:20:07 +0900219 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
220 * @sdev: SCSI device to get identify data for
221 * @arg: User buffer area for identify data
222 *
223 * LOCKING:
224 * Defined by the SCSI layer. We don't really care.
225 *
226 * RETURNS:
227 * Zero on success, negative errno on error.
228 */
229static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
230{
231 struct ata_port *ap = ata_shost_to_port(sdev->host);
232 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
233 u16 __user *dst = arg;
234 char buf[40];
235
236 if (!dev)
237 return -ENOMSG;
238
239 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
240 return -EFAULT;
241
242 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
243 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
244 return -EFAULT;
245
246 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
247 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
248 return -EFAULT;
249
250 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
251 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
252 return -EFAULT;
253
254 return 0;
255}
256
257/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400258 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800259 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400260 * @arg: User provided data for issuing command
261 *
262 * LOCKING:
263 * Defined by the SCSI layer. We don't really care.
264 *
265 * RETURNS:
266 * Zero on success, negative errno on error.
267 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400268int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
269{
270 int rc = 0;
271 u8 scsi_cmd[MAX_COMMAND_SIZE];
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700272 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400273 int argsize = 0;
Mike Christie85837eb2005-11-11 16:38:53 -0600274 enum dma_data_direction data_dir;
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700275 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400276
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500277 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400278 return -EINVAL;
279
280 if (copy_from_user(args, arg, sizeof(args)))
281 return -EFAULT;
282
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700283 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
284 if (!sensebuf)
285 return -ENOMEM;
286
Jeff Garzikb0955182005-05-12 15:45:22 -0400287 memset(scsi_cmd, 0, sizeof(scsi_cmd));
288
289 if (args[3]) {
290 argsize = SECTOR_SIZE * args[3];
291 argbuf = kmalloc(argsize, GFP_KERNEL);
Jeff Raubitschek54dac832005-10-04 10:21:19 -0400292 if (argbuf == NULL) {
293 rc = -ENOMEM;
294 goto error;
295 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400296
297 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
298 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400299 block count in sector count field */
Mike Christie85837eb2005-11-11 16:38:53 -0600300 data_dir = DMA_FROM_DEVICE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400301 } else {
302 scsi_cmd[1] = (3 << 1); /* Non-data */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700303 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Mike Christie85837eb2005-11-11 16:38:53 -0600304 data_dir = DMA_NONE;
Jeff Garzikb0955182005-05-12 15:45:22 -0400305 }
306
307 scsi_cmd[0] = ATA_16;
308
309 scsi_cmd[4] = args[2];
310 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
311 scsi_cmd[6] = args[3];
312 scsi_cmd[8] = args[1];
313 scsi_cmd[10] = 0x4f;
314 scsi_cmd[12] = 0xc2;
315 } else {
316 scsi_cmd[6] = args[1];
317 }
318 scsi_cmd[14] = args[0];
319
320 /* Good values for timeout and retries? Values below
321 from scsi_ioctl_send_command() for default case... */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700322 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400323 sensebuf, (10*HZ), 5, 0);
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700324
325 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
326 u8 *desc = sensebuf + 8;
327 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
328
329 /* If we set cc then ATA pass-through will cause a
330 * check condition even if no error. Filter that. */
331 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
332 struct scsi_sense_hdr sshdr;
333 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400334 &sshdr);
335 if (sshdr.sense_key == 0 &&
336 sshdr.asc == 0 && sshdr.ascq == 0)
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700337 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
338 }
339
340 /* Send userspace a few ATA registers (same as drivers/ide) */
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400341 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
342 desc[0] == 0x09) { /* code is "ATA Descriptor" */
343 args[0] = desc[13]; /* status */
344 args[1] = desc[3]; /* error */
345 args[2] = desc[5]; /* sector count (0:7) */
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700346 if (copy_to_user(arg, args, sizeof(args)))
347 rc = -EFAULT;
348 }
349 }
350
351
352 if (cmd_result) {
Jeff Garzikb0955182005-05-12 15:45:22 -0400353 rc = -EIO;
354 goto error;
355 }
356
Jeff Garzikb0955182005-05-12 15:45:22 -0400357 if ((argbuf)
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500358 && copy_to_user(arg + sizeof(args), argbuf, argsize))
Jeff Garzikb0955182005-05-12 15:45:22 -0400359 rc = -EFAULT;
360error:
Eran Tromerbbe1fe72006-10-10 14:29:25 -0700361 kfree(sensebuf);
Jesper Juhl8f760782006-06-27 02:55:06 -0700362 kfree(argbuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400363 return rc;
364}
365
366/**
367 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800368 * @scsidev: Device to which we are issuing command
Jeff Garzikb0955182005-05-12 15:45:22 -0400369 * @arg: User provided data for issuing command
370 *
371 * LOCKING:
372 * Defined by the SCSI layer. We don't really care.
373 *
374 * RETURNS:
375 * Zero on success, negative errno on error.
376 */
377int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
378{
379 int rc = 0;
380 u8 scsi_cmd[MAX_COMMAND_SIZE];
David Milburnaf068bd2007-01-30 00:59:15 -0800381 u8 args[7], *sensebuf = NULL;
382 int cmd_result;
Jeff Garzikb0955182005-05-12 15:45:22 -0400383
Randy Dunlapc893a3a2006-01-28 13:15:32 -0500384 if (arg == NULL)
Jeff Garzikb0955182005-05-12 15:45:22 -0400385 return -EINVAL;
386
387 if (copy_from_user(args, arg, sizeof(args)))
388 return -EFAULT;
389
David Milburnaf068bd2007-01-30 00:59:15 -0800390 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
391 if (!sensebuf)
392 return -ENOMEM;
393
Jeff Garzikb0955182005-05-12 15:45:22 -0400394 memset(scsi_cmd, 0, sizeof(scsi_cmd));
395 scsi_cmd[0] = ATA_16;
396 scsi_cmd[1] = (3 << 1); /* Non-data */
David Milburnaf068bd2007-01-30 00:59:15 -0800397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
Jeff Garzikb0955182005-05-12 15:45:22 -0400398 scsi_cmd[4] = args[1];
399 scsi_cmd[6] = args[2];
400 scsi_cmd[8] = args[3];
401 scsi_cmd[10] = args[4];
402 scsi_cmd[12] = args[5];
Mark Lord277239f2007-03-30 17:45:52 -0400403 scsi_cmd[13] = args[6] & 0x4f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400404 scsi_cmd[14] = args[0];
405
Jeff Garzikb0955182005-05-12 15:45:22 -0400406 /* Good values for timeout and retries? Values below
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500407 from scsi_ioctl_send_command() for default case... */
David Milburnaf068bd2007-01-30 00:59:15 -0800408 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
409 sensebuf, (10*HZ), 5, 0);
Jeff Garzikb0955182005-05-12 15:45:22 -0400410
David Milburnaf068bd2007-01-30 00:59:15 -0800411 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
412 u8 *desc = sensebuf + 8;
413 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
414
415 /* If we set cc then ATA pass-through will cause a
416 * check condition even if no error. Filter that. */
417 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
418 struct scsi_sense_hdr sshdr;
419 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
420 &sshdr);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400421 if (sshdr.sense_key == 0 &&
422 sshdr.asc == 0 && sshdr.ascq == 0)
David Milburnaf068bd2007-01-30 00:59:15 -0800423 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
424 }
425
426 /* Send userspace ATA registers */
427 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
428 desc[0] == 0x09) {/* code is "ATA Descriptor" */
429 args[0] = desc[13]; /* status */
430 args[1] = desc[3]; /* error */
431 args[2] = desc[5]; /* sector count (0:7) */
432 args[3] = desc[7]; /* lbal */
433 args[4] = desc[9]; /* lbam */
434 args[5] = desc[11]; /* lbah */
435 args[6] = desc[12]; /* select */
436 if (copy_to_user(arg, args, sizeof(args)))
437 rc = -EFAULT;
438 }
439 }
440
441 if (cmd_result) {
442 rc = -EIO;
443 goto error;
444 }
445
446 error:
447 kfree(sensebuf);
Jeff Garzikb0955182005-05-12 15:45:22 -0400448 return rc;
449}
450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
452{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 int val = -EINVAL, rc = -EINVAL;
454
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 switch (cmd) {
456 case ATA_IOC_GET_IO32:
457 val = 0;
458 if (copy_to_user(arg, &val, 1))
459 return -EFAULT;
460 return 0;
461
462 case ATA_IOC_SET_IO32:
463 val = (unsigned long) arg;
464 if (val != 0)
465 return -EINVAL;
466 return 0;
467
Tejun Heo5924b742007-01-02 20:20:07 +0900468 case HDIO_GET_IDENTITY:
469 return ata_get_identity(scsidev, arg);
470
Jeff Garzikb0955182005-05-12 15:45:22 -0400471 case HDIO_DRIVE_CMD:
472 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
473 return -EACCES;
474 return ata_cmd_ioctl(scsidev, arg);
475
476 case HDIO_DRIVE_TASK:
477 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
478 return -EACCES;
479 return ata_task_ioctl(scsidev, arg);
480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 default:
482 rc = -ENOTTY;
483 break;
484 }
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 return rc;
487}
488
489/**
490 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 * @dev: ATA device to which the new command is attached
492 * @cmd: SCSI command that originated this ATA command
493 * @done: SCSI command completion function
494 *
495 * Obtain a reference to an unused ata_queued_cmd structure,
496 * which is the basic libata structure representing a single
497 * ATA command sent to the hardware.
498 *
499 * If a command was available, fill in the SCSI-specific
500 * portions of the structure with information on the
501 * current command.
502 *
503 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400504 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 *
506 * RETURNS:
507 * Command allocated, or %NULL if none available.
508 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100509static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
510 struct scsi_cmnd *cmd,
511 void (*done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512{
513 struct ata_queued_cmd *qc;
514
Tejun Heo3373efd2006-05-15 20:57:53 +0900515 qc = ata_qc_new_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 if (qc) {
517 qc->scsicmd = cmd;
518 qc->scsidone = done;
519
Tejun Heoff2aeb12007-12-05 16:43:11 +0900520 qc->sg = scsi_sglist(cmd);
Boaz Harrosh71201652007-09-18 17:48:50 +0200521 qc->n_elem = scsi_sg_count(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 } else {
523 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
524 done(cmd);
525 }
526
527 return qc;
528}
529
Tejun Heoaacda372008-03-18 17:47:43 +0900530static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
531{
532 struct scsi_cmnd *scmd = qc->scsicmd;
533
534 qc->extrabytes = scmd->request->extra_len;
535 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
536}
537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400539 * ata_dump_status - user friendly display of error info
540 * @id: id of the port in question
541 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400543 * Decode and dump the ATA error/status registers for the user so
544 * that they have some idea what really happened at the non
545 * make-believe layer.
546 *
547 * LOCKING:
548 * inherited from caller
549 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100550static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400551{
552 u8 stat = tf->command, err = tf->feature;
553
554 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
555 if (stat & ATA_BUSY) {
556 printk("Busy }\n"); /* Data is not valid in this case */
557 } else {
558 if (stat & 0x40) printk("DriveReady ");
559 if (stat & 0x20) printk("DeviceFault ");
560 if (stat & 0x10) printk("SeekComplete ");
561 if (stat & 0x08) printk("DataRequest ");
562 if (stat & 0x04) printk("CorrectedError ");
563 if (stat & 0x02) printk("Index ");
564 if (stat & 0x01) printk("Error ");
565 printk("}\n");
566
567 if (err) {
568 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
569 if (err & 0x04) printk("DriveStatusError ");
570 if (err & 0x80) {
571 if (err & 0x04) printk("BadCRC ");
572 else printk("Sector ");
573 }
574 if (err & 0x40) printk("UncorrectableError ");
575 if (err & 0x10) printk("SectorIdNotFound ");
576 if (err & 0x02) printk("TrackZeroNotFound ");
577 if (err & 0x01) printk("AddrMarkNotFound ");
578 printk("}\n");
579 }
580 }
581}
582
583/**
584 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800585 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400586 * @drv_stat: value contained in ATA status register
587 * @drv_err: value contained in ATA error register
588 * @sk: the sense key we'll fill out
589 * @asc: the additional sense code we'll fill out
590 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900591 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400592 *
593 * Converts an ATA error into a SCSI error. Fill out pointers to
594 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
595 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 *
597 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400598 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100600static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
601 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
Jeff Garzikb0955182005-05-12 15:45:22 -0400603 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400604
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100606 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 /* BBD|ECC|ID|MAR */
608 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
609 /* BBD|ECC|ID */
610 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
611 /* ECC|MC|MARK */
612 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
613 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
614 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
615 /* MC|ID|ABRT|TRK0|MARK */
616 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
617 /* MCR|MARK */
618 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
619 /* Bad address mark */
620 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
621 /* TRK0 */
622 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
623 /* Abort & !ICRC */
624 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
625 /* Media change request */
626 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
627 /* SRV */
628 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
629 /* Media change */
630 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
631 /* ECC */
632 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
633 /* BBD - block marked bad */
634 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
635 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
636 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100637 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 /* Must be first because BUSY means no other bits valid */
639 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
640 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
641 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
642 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
643 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
644 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 /*
647 * Is this an error we can process/parse
648 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400649 if (drv_stat & ATA_BUSY) {
650 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
Jeff Garzikb0955182005-05-12 15:45:22 -0400653 if (drv_err) {
654 /* Look for drv_err */
655 for (i = 0; sense_table[i][0] != 0xFF; i++) {
656 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500657 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400658 sense_table[i][0]) {
659 *sk = sense_table[i][1];
660 *asc = sense_table[i][2];
661 *ascq = sense_table[i][3];
662 goto translate_done;
663 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400665 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900666 if (verbose)
667 printk(KERN_WARNING "ata%u: no sense translation for "
668 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 }
670
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400672 for (i = 0; stat_table[i][0] != 0xFF; i++) {
673 if (stat_table[i][0] & drv_stat) {
674 *sk = stat_table[i][1];
675 *asc = stat_table[i][2];
676 *ascq = stat_table[i][3];
677 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400680 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900681 if (verbose)
682 printk(KERN_WARNING "ata%u: no sense translation for "
683 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Alan Cox2d202022006-03-21 15:53:46 +0000685 /* We need a sensible error return here, which is tricky, and one
686 that won't cause people to do things like return a disk wrongly */
687 *sk = ABORTED_COMMAND;
688 *asc = 0x00;
689 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400690
691 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900692 if (verbose)
693 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
694 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
695 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400696 return;
697}
698
699/*
Tejun Heo750426a2006-11-14 22:37:35 +0900700 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400701 * @qc: Command that completed.
702 *
703 * This function is specific to the ATA descriptor format sense
704 * block specified for the ATA pass through commands. Regardless
705 * of whether the command errored or not, return a sense
706 * block. Copy all controller registers into the sense
707 * block. Clear sense key, ASC & ASCQ if there is no error.
708 *
709 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900710 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400711 */
Tejun Heo750426a2006-11-14 22:37:35 +0900712static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400713{
714 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900715 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400716 unsigned char *sb = cmd->sense_buffer;
717 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900718 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400719
720 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
721
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400722 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400723
724 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400725 * Use ata_to_sense_error() to map status register bits
726 * onto sense key, asc & ascq.
727 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900728 if (qc->err_mask ||
729 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900730 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900731 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400732 sb[1] &= 0x0f;
733 }
734
735 /*
736 * Sense data is current and format is descriptor.
737 */
738 sb[0] = 0x72;
739
740 desc[0] = 0x09;
741
Tejun Heof38621b2006-11-14 22:37:35 +0900742 /* set length of additional sense data */
743 sb[7] = 14;
744 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400745
746 /*
747 * Copy registers into sense buffer.
748 */
749 desc[2] = 0x00;
750 desc[3] = tf->feature; /* == error reg */
751 desc[5] = tf->nsect;
752 desc[7] = tf->lbal;
753 desc[9] = tf->lbam;
754 desc[11] = tf->lbah;
755 desc[12] = tf->device;
756 desc[13] = tf->command; /* == status reg */
757
758 /*
759 * Fill in Extend bit, and the high order bytes
760 * if applicable.
761 */
762 if (tf->flags & ATA_TFLAG_LBA48) {
763 desc[2] |= 0x01;
764 desc[4] = tf->hob_nsect;
765 desc[6] = tf->hob_lbal;
766 desc[8] = tf->hob_lbam;
767 desc[10] = tf->hob_lbah;
768 }
769}
770
771/**
Tejun Heo750426a2006-11-14 22:37:35 +0900772 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -0400773 * @qc: Command that we are erroring out
774 *
Tejun Heod25614b2006-11-14 22:37:35 +0900775 * Generate sense block for a failed ATA command @qc. Descriptor
776 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -0400777 *
778 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900779 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400780 */
Tejun Heo750426a2006-11-14 22:37:35 +0900781static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400782{
Tejun Heod25614b2006-11-14 22:37:35 +0900783 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -0400784 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900785 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400786 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +0900787 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900788 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +0900789 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -0400790
791 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
792
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400793 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400794
Tejun Heod25614b2006-11-14 22:37:35 +0900795 /* sense data is current and format is descriptor */
796 sb[0] = 0x72;
797
798 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -0400799 * onto sense key, asc & ascq.
800 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900801 if (qc->err_mask ||
802 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900803 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +0900804 &sb[1], &sb[2], &sb[3], verbose);
805 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400806 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
Tejun Heod25614b2006-11-14 22:37:35 +0900808 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -0400809
Tejun Heod25614b2006-11-14 22:37:35 +0900810 /* information sense data descriptor */
811 sb[7] = 12;
812 desc[0] = 0x00;
813 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -0500814
Tejun Heod25614b2006-11-14 22:37:35 +0900815 desc[2] |= 0x80; /* valid */
816 desc[6] = block >> 40;
817 desc[7] = block >> 32;
818 desc[8] = block >> 24;
819 desc[9] = block >> 16;
820 desc[10] = block >> 8;
821 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822}
823
Brian Kinga6cce2a2006-03-17 17:04:15 -0600824static void ata_scsi_sdev_config(struct scsi_device *sdev)
825{
826 sdev->use_10_for_rw = 1;
827 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +0900828
829 /* Schedule policy is determined by ->qc_defer() callback and
830 * it needs to see every deferred qc. Set dev_blocked to 1 to
831 * prevent SCSI midlayer from automatically deferring
832 * requests.
833 */
834 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600835}
836
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100837/**
838 * atapi_drain_needed - Check whether data transfer may overflow
Randy Dunlap73fd8b62008-02-19 13:43:21 -0800839 * @rq: request to be checked
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100840 *
841 * ATAPI commands which transfer variable length data to host
842 * might overflow due to application error or hardare bug. This
843 * function checks whether overflow should be drained and ignored
844 * for @request.
845 *
846 * LOCKING:
847 * None.
848 *
849 * RETURNS:
850 * 1 if ; otherwise, 0.
851 */
852static int atapi_drain_needed(struct request *rq)
853{
854 if (likely(!blk_pc_request(rq)))
855 return 0;
856
857 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
858 return 0;
859
860 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
861}
862
863static int ata_scsi_dev_config(struct scsi_device *sdev,
864 struct ata_device *dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -0600865{
Tejun Heo914ed352006-11-01 18:39:55 +0900866 /* configure max sectors */
867 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -0600868
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100869 if (dev->class == ATA_DEV_ATAPI) {
870 struct request_queue *q = sdev->request_queue;
871 void *buf;
872
Tejun Heoe3790c72008-03-04 11:18:17 +0100873 /* set the min alignment and padding */
James Bottomleyd0ad3bc2008-01-22 13:43:48 -0600874 blk_queue_update_dma_alignment(sdev->request_queue,
875 ATA_DMA_PAD_SZ - 1);
Tejun Heoe3790c72008-03-04 11:18:17 +0100876 blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100877
878 /* configure draining */
879 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
880 if (!buf) {
881 ata_dev_printk(dev, KERN_ERR,
882 "drain buffer allocation failed\n");
883 return -ENOMEM;
884 }
885
886 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
887 } else {
James Bottomleyd0ad3bc2008-01-22 13:43:48 -0600888 /* ATA devices must be sector aligned */
889 blk_queue_update_dma_alignment(sdev->request_queue,
890 ATA_SECT_SIZE - 1);
Tejun Heod8cf5382008-01-15 08:46:59 +0900891 sdev->manage_start_stop = 1;
James Bottomleydde20202008-02-19 11:36:56 +0100892 }
Tejun Heod8cf5382008-01-15 08:46:59 +0900893
Jeff Garzikf26792d2007-10-29 17:18:39 -0400894 if (dev->flags & ATA_DFLAG_AN)
895 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
896
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900897 if (dev->flags & ATA_DFLAG_NCQ) {
898 int depth;
899
900 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
901 depth = min(ATA_MAX_QUEUE - 1, depth);
902 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
903 }
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100904
905 return 0;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600906}
907
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908/**
909 * ata_scsi_slave_config - Set SCSI device attributes
910 * @sdev: SCSI device to examine
911 *
912 * This is called before we actually start reading
913 * and writing to the device, to configure certain
914 * SCSI mid-layer behaviors.
915 *
916 * LOCKING:
917 * Defined by SCSI layer. We don't really care.
918 */
919
920int ata_scsi_slave_config(struct scsi_device *sdev)
921{
Tejun Heo31534362006-05-31 18:27:36 +0900922 struct ata_port *ap = ata_shost_to_port(sdev->host);
923 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100924 int rc = 0;
Tejun Heo31534362006-05-31 18:27:36 +0900925
Brian Kinga6cce2a2006-03-17 17:04:15 -0600926 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
Tejun Heo31534362006-05-31 18:27:36 +0900928 if (dev)
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100929 rc = ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100931 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932}
933
934/**
Tejun Heo83c47bc2006-05-31 18:28:07 +0900935 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
936 * @sdev: SCSI device to be destroyed
937 *
938 * @sdev is about to be destroyed for hot/warm unplugging. If
939 * this unplugging was initiated by libata as indicated by NULL
940 * dev->sdev, this function doesn't have to do anything.
941 * Otherwise, SCSI layer initiated warm-unplug is in progress.
942 * Clear dev->sdev, schedule the device for ATA detach and invoke
943 * EH.
944 *
945 * LOCKING:
946 * Defined by SCSI layer. We don't really care.
947 */
948void ata_scsi_slave_destroy(struct scsi_device *sdev)
949{
950 struct ata_port *ap = ata_shost_to_port(sdev->host);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100951 struct request_queue *q = sdev->request_queue;
Tejun Heo83c47bc2006-05-31 18:28:07 +0900952 unsigned long flags;
953 struct ata_device *dev;
954
955 if (!ap->ops->error_handler)
956 return;
957
Jeff Garzikba6a1302006-06-22 23:46:10 -0400958 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900959 dev = __ata_scsi_find_dev(ap, sdev);
960 if (dev && dev->sdev) {
961 /* SCSI device already in CANCEL state, no need to offline it */
962 dev->sdev = NULL;
963 dev->flags |= ATA_DFLAG_DETACH;
964 ata_port_schedule_eh(ap);
965 }
Jeff Garzikba6a1302006-06-22 23:46:10 -0400966 spin_unlock_irqrestore(ap->lock, flags);
James Bottomleyfa2fc7f2008-02-19 11:36:57 +0100967
968 kfree(q->dma_drain_buffer);
969 q->dma_drain_buffer = NULL;
970 q->dma_drain_size = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +0900971}
972
973/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900974 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
975 * @sdev: SCSI device to configure queue depth for
976 * @queue_depth: new queue depth
977 *
978 * This is libata standard hostt->change_queue_depth callback.
979 * SCSI will call into this callback when user tries to set queue
980 * depth via sysfs.
981 *
982 * LOCKING:
983 * SCSI layer (we don't care)
984 *
985 * RETURNS:
986 * Newly configured queue depth.
987 */
988int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
989{
990 struct ata_port *ap = ata_shost_to_port(sdev->host);
991 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +0900992 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900993
Tejun Heoc3c70c42007-02-20 23:31:22 +0900994 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900995 return sdev->queue_depth;
996
997 dev = ata_scsi_find_dev(ap, sdev);
998 if (!dev || !ata_dev_enabled(dev))
999 return sdev->queue_depth;
1000
Tejun Heoc3c70c42007-02-20 23:31:22 +09001001 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +09001002 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +09001003 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1004 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +09001005 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +09001006 queue_depth = 1;
1007 }
Tejun Heo360f6542006-09-30 19:45:00 +09001008 spin_unlock_irqrestore(ap->lock, flags);
1009
Tejun Heoc3c70c42007-02-20 23:31:22 +09001010 /* limit and apply queue depth */
1011 queue_depth = min(queue_depth, sdev->host->can_queue);
1012 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1013 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1014
1015 if (sdev->queue_depth == queue_depth)
1016 return -EINVAL;
1017
1018 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001019 return queue_depth;
1020}
1021
Tejun Heod9aca222007-05-17 16:43:26 +02001022/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001023static void ata_delayed_done_timerfn(unsigned long arg)
1024{
1025 struct scsi_cmnd *scmd = (void *)arg;
1026
1027 scmd->scsi_done(scmd);
1028}
1029
Tejun Heod9aca222007-05-17 16:43:26 +02001030/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +02001031static void ata_delayed_done(struct scsi_cmnd *scmd)
1032{
1033 static struct timer_list timer;
1034
1035 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1036 mod_timer(&timer, jiffies + 5 * HZ);
1037}
1038
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001039/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001040 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1041 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001042 *
1043 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1044 * (to start). Perhaps these commands should be preceded by
1045 * CHECK POWER MODE to see what power mode the device is already in.
1046 * [See SAT revision 5 at www.t10.org]
1047 *
1048 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001049 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001050 *
1051 * RETURNS:
1052 * Zero on success, non-zero on error.
1053 */
Tejun Heoad706992006-12-17 10:45:57 +09001054static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001055{
Tejun Heo542b1442006-12-17 10:45:08 +09001056 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001057 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001058 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001059
Tejun Heo2e5704f2006-12-17 10:46:33 +09001060 if (scmd->cmd_len < 5)
1061 goto invalid_fld;
1062
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001063 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1064 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001065 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001066 ; /* ignore IMMED bit, violates sat-r05 */
1067 }
Tejun Heo542b1442006-12-17 10:45:08 +09001068 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001069 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001070 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001071 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001072
1073 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
1074 /* the device lacks PM support, finish without doing anything */
1075 scmd->result = SAM_STAT_GOOD;
1076 return 1;
1077 }
1078
Tejun Heo542b1442006-12-17 10:45:08 +09001079 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001080 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001081
1082 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001083 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001084
1085 tf->lbah = 0x0;
1086 tf->lbam = 0x0;
1087 tf->lbal = 0x0;
1088 tf->device |= ATA_LBA;
1089 } else {
1090 /* CHS */
1091 tf->lbal = 0x1; /* sect */
1092 tf->lbam = 0x0; /* cyl low */
1093 tf->lbah = 0x0; /* cyl high */
1094 }
1095
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001096 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001097 } else {
1098 /* XXX: This is for backward compatibility, will be
1099 * removed. Read Documentation/feature-removal-schedule.txt
1100 * for more info.
1101 */
Tejun Heod9aca222007-05-17 16:43:26 +02001102 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
Tejun Heo920a4b12007-05-04 21:28:48 +02001103 (system_state == SYSTEM_HALT ||
1104 system_state == SYSTEM_POWER_OFF)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001105 static unsigned long warned;
Tejun Heo920a4b12007-05-04 21:28:48 +02001106
Tejun Heoda071b42007-05-14 17:26:18 +02001107 if (!test_and_set_bit(0, &warned)) {
Tejun Heo920a4b12007-05-04 21:28:48 +02001108 ata_dev_printk(qc->dev, KERN_WARNING,
1109 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1110 "UPDATE SHUTDOWN UTILITY\n");
1111 ata_dev_printk(qc->dev, KERN_WARNING,
1112 "For more info, visit "
1113 "http://linux-ata.org/shutdown.html\n");
Tejun Heoda071b42007-05-14 17:26:18 +02001114
1115 /* ->scsi_done is not used, use it for
1116 * delayed completion.
1117 */
1118 scmd->scsi_done = qc->scsidone;
1119 qc->scsidone = ata_delayed_done;
Tejun Heo920a4b12007-05-04 21:28:48 +02001120 }
1121 scmd->result = SAM_STAT_GOOD;
1122 return 1;
1123 }
1124
Robert Hancock78981a72007-01-30 00:59:18 -08001125 /* Issue ATA STANDBY IMMEDIATE command */
1126 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001127 }
Robert Hancock78981a72007-01-30 00:59:18 -08001128
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001129 /*
1130 * Standby and Idle condition timers could be implemented but that
1131 * would require libata to implement the Power condition mode page
1132 * and allow the user to change it. Changing mode pages requires
1133 * MODE SELECT to be implemented.
1134 */
1135
1136 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001137
1138invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001139 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001140 /* "Invalid field in cbd" */
1141 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001142}
1143
1144
1145/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1147 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 *
1149 * Sets up an ATA taskfile to issue FLUSH CACHE or
1150 * FLUSH CACHE EXT.
1151 *
1152 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001153 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 *
1155 * RETURNS:
1156 * Zero on success, non-zero on error.
1157 */
Tejun Heoad706992006-12-17 10:45:57 +09001158static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159{
1160 struct ata_taskfile *tf = &qc->tf;
1161
1162 tf->flags |= ATA_TFLAG_DEVICE;
1163 tf->protocol = ATA_PROT_NODATA;
1164
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001165 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 tf->command = ATA_CMD_FLUSH_EXT;
1167 else
1168 tf->command = ATA_CMD_FLUSH;
1169
Tejun Heob666da32007-10-26 15:53:59 +09001170 /* flush is critical for IO integrity, consider it an IO command */
1171 qc->flags |= ATA_QCFLAG_IO;
1172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 return 0;
1174}
1175
1176/**
Albert Lee3aef5232005-10-04 08:47:43 -04001177 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001178 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001179 *
1180 * Calculate LBA and transfer length for 6-byte commands.
1181 *
1182 * RETURNS:
1183 * @plba: the LBA
1184 * @plen: the transfer length
1185 */
Tejun Heo542b1442006-12-17 10:45:08 +09001186static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001187{
1188 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001189 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001190
1191 VPRINTK("six-byte command\n");
1192
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001193 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001194 lba |= ((u64)cdb[2]) << 8;
1195 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001196
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001197 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001198
1199 *plba = lba;
1200 *plen = len;
1201}
1202
1203/**
1204 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001205 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001206 *
1207 * Calculate LBA and transfer length for 10-byte commands.
1208 *
1209 * RETURNS:
1210 * @plba: the LBA
1211 * @plen: the transfer length
1212 */
Tejun Heo542b1442006-12-17 10:45:08 +09001213static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001214{
1215 u64 lba = 0;
1216 u32 len = 0;
1217
1218 VPRINTK("ten-byte command\n");
1219
Tejun Heo542b1442006-12-17 10:45:08 +09001220 lba |= ((u64)cdb[2]) << 24;
1221 lba |= ((u64)cdb[3]) << 16;
1222 lba |= ((u64)cdb[4]) << 8;
1223 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001224
Tejun Heo542b1442006-12-17 10:45:08 +09001225 len |= ((u32)cdb[7]) << 8;
1226 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001227
1228 *plba = lba;
1229 *plen = len;
1230}
1231
1232/**
1233 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001234 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001235 *
1236 * Calculate LBA and transfer length for 16-byte commands.
1237 *
1238 * RETURNS:
1239 * @plba: the LBA
1240 * @plen: the transfer length
1241 */
Tejun Heo542b1442006-12-17 10:45:08 +09001242static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001243{
1244 u64 lba = 0;
1245 u32 len = 0;
1246
1247 VPRINTK("sixteen-byte command\n");
1248
Tejun Heo542b1442006-12-17 10:45:08 +09001249 lba |= ((u64)cdb[2]) << 56;
1250 lba |= ((u64)cdb[3]) << 48;
1251 lba |= ((u64)cdb[4]) << 40;
1252 lba |= ((u64)cdb[5]) << 32;
1253 lba |= ((u64)cdb[6]) << 24;
1254 lba |= ((u64)cdb[7]) << 16;
1255 lba |= ((u64)cdb[8]) << 8;
1256 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001257
Tejun Heo542b1442006-12-17 10:45:08 +09001258 len |= ((u32)cdb[10]) << 24;
1259 len |= ((u32)cdb[11]) << 16;
1260 len |= ((u32)cdb[12]) << 8;
1261 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001262
1263 *plba = lba;
1264 *plen = len;
1265}
1266
1267/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1269 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 *
1271 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1272 *
1273 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001274 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 *
1276 * RETURNS:
1277 * Zero on success, non-zero on error.
1278 */
Tejun Heoad706992006-12-17 10:45:57 +09001279static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280{
Tejun Heo542b1442006-12-17 10:45:08 +09001281 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001283 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001285 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001286 u64 block;
1287 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
1289 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1290 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
Tejun Heo2e5704f2006-12-17 10:46:33 +09001292 if (cdb[0] == VERIFY) {
1293 if (scmd->cmd_len < 10)
1294 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001295 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001296 } else if (cdb[0] == VERIFY_16) {
1297 if (scmd->cmd_len < 16)
1298 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001299 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001300 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001301 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Albert Lee8bf62ec2005-05-12 15:29:42 -04001303 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001304 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001305 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001306 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001307 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001308 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
Albert Lee07506692005-10-12 15:04:18 +08001310 if (dev->flags & ATA_DFLAG_LBA) {
1311 tf->flags |= ATA_TFLAG_LBA;
1312
Albert Leec6a33e22005-10-12 15:12:26 +08001313 if (lba_28_ok(block, n_block)) {
1314 /* use LBA28 */
1315 tf->command = ATA_CMD_VERIFY;
1316 tf->device |= (block >> 24) & 0xf;
1317 } else if (lba_48_ok(block, n_block)) {
1318 if (!(dev->flags & ATA_DFLAG_LBA48))
1319 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001320
1321 /* use LBA48 */
1322 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001323 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
Albert Lee8bf62ec2005-05-12 15:29:42 -04001325 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
Albert Lee8bf62ec2005-05-12 15:29:42 -04001327 tf->hob_lbah = (block >> 40) & 0xff;
1328 tf->hob_lbam = (block >> 32) & 0xff;
1329 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001330 } else
1331 /* request too large even for LBA48 */
1332 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001333
1334 tf->nsect = n_block & 0xff;
1335
1336 tf->lbah = (block >> 16) & 0xff;
1337 tf->lbam = (block >> 8) & 0xff;
1338 tf->lbal = block & 0xff;
1339
1340 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001342 /* CHS */
1343 u32 sect, head, cyl, track;
1344
Albert Leec6a33e22005-10-12 15:12:26 +08001345 if (!lba_28_ok(block, n_block))
1346 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001347
Albert Lee8bf62ec2005-05-12 15:29:42 -04001348 /* Convert LBA to CHS */
1349 track = (u32)block / dev->sectors;
1350 cyl = track / dev->heads;
1351 head = track % dev->heads;
1352 sect = (u32)block % dev->sectors + 1;
1353
Albert Leec187c4b2005-10-04 08:46:51 -04001354 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1355 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001356
1357 /* Check whether the converted CHS can fit.
1358 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001359 Head: 0-15
1360 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001361 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001362 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001365 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1366 tf->lbal = sect;
1367 tf->lbam = cyl;
1368 tf->lbah = cyl >> 8;
1369 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 }
1371
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001373
1374invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001375 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001376 /* "Invalid field in cbd" */
1377 return 1;
1378
1379out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001380 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001381 /* "Logical Block Address out of range" */
1382 return 1;
1383
1384nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001385 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001386 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387}
1388
1389/**
1390 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1391 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 *
1393 * Converts any of six SCSI read/write commands into the
1394 * ATA counterpart, including starting sector (LBA),
1395 * sector count, and taking into account the device's LBA48
1396 * support.
1397 *
1398 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1399 * %WRITE_16 are currently supported.
1400 *
1401 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001402 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 *
1404 * RETURNS:
1405 * Zero on success, non-zero on error.
1406 */
Tejun Heoad706992006-12-17 10:45:57 +09001407static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408{
Tejun Heo542b1442006-12-17 10:45:08 +09001409 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001410 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001411 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001412 u64 block;
1413 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001414 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Tejun Heo542b1442006-12-17 10:45:08 +09001416 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001417 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001419 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001420 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001421 case READ_10:
1422 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001423 if (unlikely(scmd->cmd_len < 10))
1424 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001425 scsi_10_lba_len(cdb, &block, &n_block);
1426 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001427 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001428 break;
1429 case READ_6:
1430 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001431 if (unlikely(scmd->cmd_len < 6))
1432 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001433 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001434
1435 /* for 6-byte r/w commands, transfer length 0
1436 * means 256 blocks of data, not 0 block.
1437 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001438 if (!n_block)
1439 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001440 break;
1441 case READ_16:
1442 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001443 if (unlikely(scmd->cmd_len < 16))
1444 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001445 scsi_16_lba_len(cdb, &block, &n_block);
1446 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001447 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001448 break;
1449 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001450 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001451 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 }
1453
Albert Lee8bf62ec2005-05-12 15:29:42 -04001454 /* Check and compose ATA command */
1455 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001456 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1457 * length 0 means transfer 0 block of data.
1458 * However, for ATA R/W commands, sector count 0 means
1459 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001460 *
1461 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001462 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001463 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001464
Tejun Heobd056d72006-11-14 22:47:10 +09001465 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001466 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001467
Tejun Heobd056d72006-11-14 22:47:10 +09001468 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1469 qc->tag);
1470 if (likely(rc == 0))
1471 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001472
Tejun Heobd056d72006-11-14 22:47:10 +09001473 if (rc == -ERANGE)
1474 goto out_of_range;
1475 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001476invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001477 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001478 /* "Invalid field in cbd" */
1479 return 1;
1480
1481out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001482 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001483 /* "Logical Block Address out of range" */
1484 return 1;
1485
1486nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001487 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001488 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489}
1490
Tejun Heo77853bf2006-01-23 13:09:36 +09001491static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492{
Tejun Heoc31f5712006-11-22 12:39:43 +09001493 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001495 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001496 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
Jeff Garzikb0955182005-05-12 15:45:22 -04001498 /* For ATA pass thru (SAT) commands, generate a sense block if
1499 * user mandated it or if there's an error. Note that if we
1500 * generate because the user forced us to, a check condition
1501 * is generated and the ATA register values are returned
1502 * whether the command completed successfully or not. If there
1503 * was no error, SK, ASC and ASCQ will all be zero.
1504 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001505 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001506 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001507 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001508 } else {
1509 if (!need_sense) {
1510 cmd->result = SAM_STAT_GOOD;
1511 } else {
1512 /* TODO: decide which descriptor format to use
1513 * for 48b LBA devices and call that here
1514 * instead of the fixed desc, which is only
1515 * good for smaller LBA (and maybe CHS?)
1516 * devices.
1517 */
Tejun Heo750426a2006-11-14 22:37:35 +09001518 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001519 }
1520 }
1521
Tejun Heod9aca222007-05-17 16:43:26 +02001522 /* XXX: track spindown state for spindown skipping and warning */
Tejun Heo13b8d092007-05-15 12:29:22 +02001523 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1524 qc->tf.command == ATA_CMD_STANDBYNOW1))
1525 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1526 else if (likely(system_state != SYSTEM_HALT &&
1527 system_state != SYSTEM_POWER_OFF))
1528 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1529
Tejun Heoc31f5712006-11-22 12:39:43 +09001530 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001531 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
1533 qc->scsidone(cmd);
1534
Tejun Heo77853bf2006-01-23 13:09:36 +09001535 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536}
1537
1538/**
1539 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 * @dev: ATA device to which the command is addressed
1541 * @cmd: SCSI command to execute
1542 * @done: SCSI command completion function
1543 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1544 *
1545 * Our ->queuecommand() function has decided that the SCSI
1546 * command issued can be directly translated into an ATA
1547 * command, rather than handled internally.
1548 *
1549 * This function sets up an ata_queued_cmd structure for the
1550 * SCSI command, and sends that ata_queued_cmd to the hardware.
1551 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001552 * The xlat_func argument (actor) returns 0 if ready to execute
1553 * ATA command, else 1 to finish translation. If 1 is returned
1554 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1555 * to be set reflecting an error condition or clean (early)
1556 * termination.
1557 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001559 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001560 *
1561 * RETURNS:
1562 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1563 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001565static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1566 void (*done)(struct scsi_cmnd *),
1567 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001569 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001571 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572
1573 VPRINTK("ENTER\n");
1574
Tejun Heo3373efd2006-05-15 20:57:53 +09001575 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001577 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578
1579 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001580 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1581 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001582 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001583 ata_dev_printk(dev, KERN_WARNING,
1584 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001585 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 }
1587
Boaz Harrosh71201652007-09-18 17:48:50 +02001588 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
1590 qc->dma_dir = cmd->sc_data_direction;
1591 }
1592
1593 qc->complete_fn = ata_scsi_qc_complete;
1594
Tejun Heoad706992006-12-17 10:45:57 +09001595 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001596 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
Tejun Heo31cc23b2007-09-23 13:14:12 +09001598 if (ap->ops->qc_defer) {
1599 if ((rc = ap->ops->qc_defer(qc)))
1600 goto defer;
1601 }
1602
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001604 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605
1606 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001607 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
Douglas Gilbertae006512005-10-09 09:09:35 -04001609early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001610 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001611 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001612 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001613 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001614
1615err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001617 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001618 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001619err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001620 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001621 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001622
1623defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001624 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001625 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001626 if (rc == ATA_DEFER_LINK)
1627 return SCSI_MLQUEUE_DEVICE_BUSY;
1628 else
1629 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630}
1631
1632/**
1633 * ata_scsi_rbuf_get - Map response buffer.
1634 * @cmd: SCSI command containing buffer to be mapped.
1635 * @buf_out: Pointer to mapped area.
1636 *
1637 * Maps buffer contained within SCSI command @cmd.
1638 *
1639 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001640 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641 *
1642 * RETURNS:
1643 * Length of response buffer.
1644 */
1645
1646static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1647{
1648 u8 *buf;
1649 unsigned int buflen;
1650
Boaz Harrosh71201652007-09-18 17:48:50 +02001651 struct scatterlist *sg = scsi_sglist(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
Boaz Harroshe10b8c32007-09-18 17:46:12 +02001653 if (sg) {
Jens Axboe45711f12007-10-22 21:19:53 +02001654 buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 buflen = sg->length;
1656 } else {
Boaz Harroshe10b8c32007-09-18 17:46:12 +02001657 buf = NULL;
1658 buflen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 }
1660
1661 *buf_out = buf;
1662 return buflen;
1663}
1664
1665/**
1666 * ata_scsi_rbuf_put - Unmap response buffer.
1667 * @cmd: SCSI command containing buffer to be unmapped.
1668 * @buf: buffer to unmap
1669 *
1670 * Unmaps response buffer contained within @cmd.
1671 *
1672 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001673 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674 */
1675
1676static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1677{
Boaz Harrosh71201652007-09-18 17:48:50 +02001678 struct scatterlist *sg = scsi_sglist(cmd);
Boaz Harroshe10b8c32007-09-18 17:46:12 +02001679 if (sg)
Jeff Garzikda02d2a2006-12-11 11:05:53 -05001680 kunmap_atomic(buf - sg->offset, KM_IRQ0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681}
1682
1683/**
1684 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1685 * @args: device IDENTIFY data / SCSI command of interest.
1686 * @actor: Callback hook for desired SCSI command simulator
1687 *
1688 * Takes care of the hard work of simulating a SCSI command...
1689 * Mapping the response buffer, calling the command's handler,
1690 * and handling the handler's return value. This return value
1691 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001692 * completed successfully (0), or not (in which case cmd->result
1693 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 *
1695 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001696 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 */
1698
1699void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001700 unsigned int (*actor) (struct ata_scsi_args *args,
1701 u8 *rbuf, unsigned int buflen))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702{
1703 u8 *rbuf;
1704 unsigned int buflen, rc;
1705 struct scsi_cmnd *cmd = args->cmd;
Jeff Garzikb445c562008-02-29 19:10:51 -05001706 unsigned long flags;
1707
1708 local_irq_save(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709
1710 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1711 memset(rbuf, 0, buflen);
1712 rc = actor(args, rbuf, buflen);
1713 ata_scsi_rbuf_put(cmd, rbuf);
1714
Jeff Garzikb445c562008-02-29 19:10:51 -05001715 local_irq_restore(flags);
1716
Douglas Gilbertae006512005-10-09 09:09:35 -04001717 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001719 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720}
1721
1722/**
Tejun Heo6a362612006-11-20 11:15:47 +09001723 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1724 * @idx: byte index into SCSI response buffer
1725 * @val: value to set
1726 *
1727 * To be used by SCSI command simulator functions. This macros
1728 * expects two local variables, u8 *rbuf and unsigned int buflen,
1729 * are in scope.
1730 *
1731 * LOCKING:
1732 * None.
1733 */
1734#define ATA_SCSI_RBUF_SET(idx, val) do { \
1735 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1736 } while (0)
1737
1738/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 * ata_scsiop_inq_std - Simulate INQUIRY command
1740 * @args: device IDENTIFY data / SCSI command of interest.
1741 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1742 * @buflen: Response buffer length.
1743 *
1744 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001745 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 *
1747 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001748 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 */
1750
1751unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1752 unsigned int buflen)
1753{
1754 u8 hdr[] = {
1755 TYPE_DISK,
1756 0,
1757 0x5, /* claim SPC-3 version compatibility */
1758 2,
1759 95 - 4
1760 };
1761
1762 /* set scsi removeable (RMB) bit per ata bit */
1763 if (ata_id_removeable(args->id))
1764 hdr[1] |= (1 << 7);
1765
1766 VPRINTK("ENTER\n");
1767
1768 memcpy(rbuf, hdr, sizeof(hdr));
1769
1770 if (buflen > 35) {
1771 memcpy(&rbuf[8], "ATA ", 8);
Tejun Heoa0cf7332007-01-02 20:18:49 +09001772 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1773 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 if (rbuf[32] == 0 || rbuf[32] == ' ')
1775 memcpy(&rbuf[32], "n/a ", 4);
1776 }
1777
1778 if (buflen > 63) {
1779 const u8 versions[] = {
1780 0x60, /* SAM-3 (no version claimed) */
1781
1782 0x03,
1783 0x20, /* SBC-2 (no version claimed) */
1784
1785 0x02,
1786 0x60 /* SPC-3 (no version claimed) */
1787 };
1788
1789 memcpy(rbuf + 59, versions, sizeof(versions));
1790 }
1791
1792 return 0;
1793}
1794
1795/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001796 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797 * @args: device IDENTIFY data / SCSI command of interest.
1798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1799 * @buflen: Response buffer length.
1800 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001801 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802 *
1803 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001804 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 */
1806
1807unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1808 unsigned int buflen)
1809{
1810 const u8 pages[] = {
1811 0x00, /* page 0x00, this page */
1812 0x80, /* page 0x80, unit serial no page */
1813 0x83 /* page 0x83, device ident page */
1814 };
Jeff Garzikb142eb62006-03-21 20:37:47 -05001815 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
1817 if (buflen > 6)
1818 memcpy(rbuf + 4, pages, sizeof(pages));
1819
1820 return 0;
1821}
1822
1823/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001824 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 * @args: device IDENTIFY data / SCSI command of interest.
1826 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1827 * @buflen: Response buffer length.
1828 *
1829 * Returns ATA device serial number.
1830 *
1831 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001832 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 */
1834
1835unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1836 unsigned int buflen)
1837{
1838 const u8 hdr[] = {
1839 0,
1840 0x80, /* this page code */
1841 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001842 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 };
1844 memcpy(rbuf, hdr, sizeof(hdr));
1845
Tejun Heoa0cf7332007-01-02 20:18:49 +09001846 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
Tejun Heo6a62a042006-02-13 10:02:46 +09001847 ata_id_string(args->id, (unsigned char *) &rbuf[4],
Tejun Heoa0cf7332007-01-02 20:18:49 +09001848 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849
1850 return 0;
1851}
1852
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001854 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 * @args: device IDENTIFY data / SCSI command of interest.
1856 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1857 * @buflen: Response buffer length.
1858 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001859 * Yields two logical unit device identification designators:
1860 * - vendor specific ASCII containing the ATA serial number
1861 * - SAT defined "t10 vendor id based" containing ASCII vendor
1862 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863 *
1864 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001865 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 */
1867
1868unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1869 unsigned int buflen)
1870{
Jeff Garzikb142eb62006-03-21 20:37:47 -05001871 int num;
1872 const int sat_model_serial_desc_len = 68;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001873
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05001875 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
Tejun Heoa0cf7332007-01-02 20:18:49 +09001877 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
Jeff Garzikb142eb62006-03-21 20:37:47 -05001878 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001879 rbuf[num + 0] = 2;
Tejun Heoa0cf7332007-01-02 20:18:49 +09001880 rbuf[num + 3] = ATA_ID_SERNO_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001881 num += 4;
1882 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001883 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1884 num += ATA_ID_SERNO_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 }
Jeff Garzikb142eb62006-03-21 20:37:47 -05001886 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1887 /* SAT defined lu model and serial numbers descriptor */
1888 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001889 rbuf[num + 0] = 2;
1890 rbuf[num + 1] = 1;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001891 rbuf[num + 3] = sat_model_serial_desc_len;
1892 num += 4;
1893 memcpy(rbuf + num, "ATA ", 8);
1894 num += 8;
1895 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001896 ATA_ID_PROD, ATA_ID_PROD_LEN);
1897 num += ATA_ID_PROD_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001898 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001899 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1900 num += ATA_ID_SERNO_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001901 }
1902 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 return 0;
1904}
1905
1906/**
Jeff Garzikad355b42007-09-21 20:38:03 -04001907 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1908 * @args: device IDENTIFY data / SCSI command of interest.
1909 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1910 * @buflen: Response buffer length.
1911 *
1912 * Yields SAT-specified ATA VPD page.
1913 *
1914 * LOCKING:
1915 * spin_lock_irqsave(host lock)
1916 */
1917
Harvey Harrison08f01052008-02-14 10:45:20 -08001918static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
Jeff Garzikad355b42007-09-21 20:38:03 -04001919 unsigned int buflen)
1920{
1921 u8 pbuf[60];
1922 struct ata_taskfile tf;
1923 unsigned int i;
1924
1925 if (!buflen)
1926 return 0;
1927
1928 memset(&pbuf, 0, sizeof(pbuf));
1929 memset(&tf, 0, sizeof(tf));
1930
1931 pbuf[1] = 0x89; /* our page code */
1932 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1933 pbuf[3] = (0x238 & 0xff);
1934
Jeff Garzikc78968b2007-09-21 21:03:28 -04001935 memcpy(&pbuf[8], "linux ", 8);
1936 memcpy(&pbuf[16], "libata ", 16);
1937 memcpy(&pbuf[32], DRV_VERSION, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04001938 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1939
1940 /* we don't store the ATA device signature, so we fake it */
1941
1942 tf.command = ATA_DRDY; /* really, this is Status reg */
1943 tf.lbal = 0x1;
1944 tf.nsect = 0x1;
1945
1946 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1947 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1948
1949 pbuf[56] = ATA_CMD_ID_ATA;
1950
1951 i = min(buflen, 60U);
1952 memcpy(rbuf, &pbuf[0], i);
1953 buflen -= i;
1954
1955 if (!buflen)
1956 return 0;
1957
1958 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1959 return 0;
1960}
1961
1962/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001963 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 * @args: device IDENTIFY data / SCSI command of interest.
1965 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1966 * @buflen: Response buffer length.
1967 *
1968 * No operation. Simply returns success to caller, to indicate
1969 * that the caller should successfully complete this SCSI command.
1970 *
1971 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001972 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 */
1974
1975unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1976 unsigned int buflen)
1977{
1978 VPRINTK("ENTER\n");
1979 return 0;
1980}
1981
1982/**
1983 * ata_msense_push - Push data onto MODE SENSE data output buffer
1984 * @ptr_io: (input/output) Location to store more output data
1985 * @last: End of output data buffer
1986 * @buf: Pointer to BLOB being added to output buffer
1987 * @buflen: Length of BLOB
1988 *
1989 * Store MODE SENSE data on an output buffer.
1990 *
1991 * LOCKING:
1992 * None.
1993 */
1994
1995static void ata_msense_push(u8 **ptr_io, const u8 *last,
1996 const u8 *buf, unsigned int buflen)
1997{
1998 u8 *ptr = *ptr_io;
1999
2000 if ((ptr + buflen - 1) > last)
2001 return;
2002
2003 memcpy(ptr, buf, buflen);
2004
2005 ptr += buflen;
2006
2007 *ptr_io = ptr;
2008}
2009
2010/**
2011 * ata_msense_caching - Simulate MODE SENSE caching info page
2012 * @id: device IDENTIFY data
2013 * @ptr_io: (input/output) Location to store more output data
2014 * @last: End of output data buffer
2015 *
2016 * Generate a caching info page, which conditionally indicates
2017 * write caching to the SCSI layer, depending on device
2018 * capabilities.
2019 *
2020 * LOCKING:
2021 * None.
2022 */
2023
2024static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
2025 const u8 *last)
2026{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002027 u8 page[CACHE_MPAGE_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002029 memcpy(page, def_cache_mpage, sizeof(page));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030 if (ata_id_wcache_enabled(id))
2031 page[2] |= (1 << 2); /* write cache enable */
2032 if (!ata_id_rahead_enabled(id))
2033 page[12] |= (1 << 5); /* disable read ahead */
2034
2035 ata_msense_push(ptr_io, last, page, sizeof(page));
2036 return sizeof(page);
2037}
2038
2039/**
2040 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2041 * @dev: Device associated with this MODE SENSE command
2042 * @ptr_io: (input/output) Location to store more output data
2043 * @last: End of output data buffer
2044 *
2045 * Generate a generic MODE SENSE control mode page.
2046 *
2047 * LOCKING:
2048 * None.
2049 */
2050
2051static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
2052{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002053 ata_msense_push(ptr_io, last, def_control_mpage,
2054 sizeof(def_control_mpage));
2055 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056}
2057
2058/**
2059 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2060 * @dev: Device associated with this MODE SENSE command
2061 * @ptr_io: (input/output) Location to store more output data
2062 * @last: End of output data buffer
2063 *
2064 * Generate a generic MODE SENSE r/w error recovery page.
2065 *
2066 * LOCKING:
2067 * None.
2068 */
2069
2070static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
2071{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002073 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
2074 sizeof(def_rw_recovery_mpage));
2075 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076}
2077
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002078/*
2079 * We can turn this into a real blacklist if it's needed, for now just
2080 * blacklist any Maxtor BANC1G10 revision firmware
2081 */
2082static int ata_dev_supports_fua(u16 *id)
2083{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002084 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002085
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002086 if (!libata_fua)
2087 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002088 if (!ata_id_has_fua(id))
2089 return 0;
2090
Tejun Heoa0cf7332007-01-02 20:18:49 +09002091 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2092 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002093
Tejun Heo2e026712006-02-12 22:47:04 +09002094 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002095 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002096 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002097 return 1;
2098
2099 return 0; /* blacklisted */
2100}
2101
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102/**
2103 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2104 * @args: device IDENTIFY data / SCSI command of interest.
2105 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2106 * @buflen: Response buffer length.
2107 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002108 * Simulate MODE SENSE commands. Assume this is invoked for direct
2109 * access devices (e.g. disks) only. There should be no block
2110 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 *
2112 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002113 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 */
2115
2116unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2117 unsigned int buflen)
2118{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002119 struct ata_device *dev = args->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 u8 *scsicmd = args->cmd->cmnd, *p, *last;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002121 const u8 sat_blk_desc[] = {
2122 0, 0, 0, 0, /* number of blocks: sat unspecified */
2123 0,
2124 0, 0x2, 0x0 /* block length: 512 bytes */
2125 };
2126 u8 pg, spg;
2127 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002128 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
2130 VPRINTK("ENTER\n");
2131
2132 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002133 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2134 /*
2135 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002137
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002139 switch (page_control) {
2140 case 0: /* current */
2141 break; /* supported */
2142 case 3: /* saved */
2143 goto saving_not_supp;
2144 case 1: /* changeable */
2145 case 2: /* defaults */
2146 default:
2147 goto invalid_fld;
2148 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002150 if (six_byte) {
2151 output_len = 4 + (ebd ? 8 : 0);
2152 alloc_len = scsicmd[4];
2153 } else {
2154 output_len = 8 + (ebd ? 8 : 0);
2155 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2156 }
2157 minlen = (alloc_len < buflen) ? alloc_len : buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158
2159 p = rbuf + output_len;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002160 last = rbuf + minlen - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002162 pg = scsicmd[2] & 0x3f;
2163 spg = scsicmd[3];
2164 /*
2165 * No mode subpages supported (yet) but asking for _all_
2166 * subpages may be valid
2167 */
2168 if (spg && (spg != ALL_SUB_MPAGES))
2169 goto invalid_fld;
2170
2171 switch(pg) {
2172 case RW_RECOVERY_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 output_len += ata_msense_rw_recovery(&p, last);
2174 break;
2175
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002176 case CACHE_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 output_len += ata_msense_caching(args->id, &p, last);
2178 break;
2179
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002180 case CONTROL_MPAGE: {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 output_len += ata_msense_ctl_mode(&p, last);
2182 break;
2183 }
2184
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002185 case ALL_MPAGES:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186 output_len += ata_msense_rw_recovery(&p, last);
2187 output_len += ata_msense_caching(args->id, &p, last);
2188 output_len += ata_msense_ctl_mode(&p, last);
2189 break;
2190
2191 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002192 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 }
2194
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002195 if (minlen < 1)
2196 return 0;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002197
2198 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002199 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002200 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2201 dpofua = 1 << 4;
2202
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203 if (six_byte) {
2204 output_len--;
2205 rbuf[0] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002206 if (minlen > 2)
2207 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002208 if (ebd) {
2209 if (minlen > 3)
2210 rbuf[3] = sizeof(sat_blk_desc);
2211 if (minlen > 11)
2212 memcpy(rbuf + 4, sat_blk_desc,
2213 sizeof(sat_blk_desc));
2214 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 } else {
2216 output_len -= 2;
2217 rbuf[0] = output_len >> 8;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002218 if (minlen > 1)
2219 rbuf[1] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002220 if (minlen > 3)
2221 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002222 if (ebd) {
2223 if (minlen > 7)
2224 rbuf[7] = sizeof(sat_blk_desc);
2225 if (minlen > 15)
2226 memcpy(rbuf + 8, sat_blk_desc,
2227 sizeof(sat_blk_desc));
2228 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002231
2232invalid_fld:
2233 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2234 /* "Invalid field in cbd" */
2235 return 1;
2236
2237saving_not_supp:
2238 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2239 /* "Saving parameters not supported" */
2240 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241}
2242
2243/**
2244 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2245 * @args: device IDENTIFY data / SCSI command of interest.
2246 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2247 * @buflen: Response buffer length.
2248 *
2249 * Simulate READ CAPACITY commands.
2250 *
2251 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002252 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002255 unsigned int buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256{
Tejun Heo6a362612006-11-20 11:15:47 +09002257 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258
2259 VPRINTK("ENTER\n");
2260
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002262 if (last_lba >= 0xffffffffULL)
2263 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002264
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 /* sector count, 32-bit */
Tejun Heo6a362612006-11-20 11:15:47 +09002266 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2267 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2268 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2269 ATA_SCSI_RBUF_SET(3, last_lba);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270
2271 /* sector size */
Tejun Heo6a362612006-11-20 11:15:47 +09002272 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
Al Viro4ca4e432007-12-30 09:32:22 +00002273 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE & 0xff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 } else {
2275 /* sector count, 64-bit */
Tejun Heo6a362612006-11-20 11:15:47 +09002276 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2277 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2278 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2279 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2280 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2281 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2282 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2283 ATA_SCSI_RBUF_SET(7, last_lba);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284
2285 /* sector size */
Tejun Heo6a362612006-11-20 11:15:47 +09002286 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
Al Viro4ca4e432007-12-30 09:32:22 +00002287 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE & 0xff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 }
2289
2290 return 0;
2291}
2292
2293/**
2294 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2295 * @args: device IDENTIFY data / SCSI command of interest.
2296 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2297 * @buflen: Response buffer length.
2298 *
2299 * Simulate REPORT LUNS command.
2300 *
2301 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002302 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 */
2304
2305unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2306 unsigned int buflen)
2307{
2308 VPRINTK("ENTER\n");
2309 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2310
2311 return 0;
2312}
2313
2314/**
Douglas Gilbert845c5832005-10-09 08:55:41 -04002315 * ata_scsi_set_sense - Set SCSI sense data and status
2316 * @cmd: SCSI request to be handled
2317 * @sk: SCSI-defined sense key
2318 * @asc: SCSI-defined additional sense code
2319 * @ascq: SCSI-defined additional sense code qualifier
2320 *
2321 * Helper function that builds a valid fixed format, current
2322 * response code and the given sense key (sk), additional sense
2323 * code (asc) and additional sense code qualifier (ascq) with
2324 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2325 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2326 *
2327 * LOCKING:
2328 * Not required
2329 */
2330
2331void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2332{
2333 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2334
2335 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2336 cmd->sense_buffer[2] = sk;
2337 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2338 cmd->sense_buffer[12] = asc;
2339 cmd->sense_buffer[13] = ascq;
2340}
2341
2342/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343 * ata_scsi_badcmd - End a SCSI request with an error
2344 * @cmd: SCSI request to be handled
2345 * @done: SCSI command completion function
2346 * @asc: SCSI-defined additional sense code
2347 * @ascq: SCSI-defined additional sense code qualifier
2348 *
2349 * Helper function that completes a SCSI command with
2350 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2351 * and the specified additional sense codes.
2352 *
2353 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002354 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 */
2356
2357void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2358{
2359 DPRINTK("ENTER\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04002360 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361
2362 done(cmd);
2363}
2364
Tejun Heo77853bf2006-01-23 13:09:36 +09002365static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002366{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002367 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002368 /* FIXME: not quite right; we don't want the
2369 * translation of taskfile registers into
2370 * a sense descriptors, since that's only
2371 * correct for ATA, not ATAPI
2372 */
Tejun Heo750426a2006-11-14 22:37:35 +09002373 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002374 }
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002375
2376 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002377 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002378}
2379
2380/* is it pointless to prefer PIO for "safety reasons"? */
2381static inline int ata_pio_use_silly(struct ata_port *ap)
2382{
2383 return (ap->flags & ATA_FLAG_PIO_DMA);
2384}
2385
2386static void atapi_request_sense(struct ata_queued_cmd *qc)
2387{
2388 struct ata_port *ap = qc->ap;
2389 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002390
2391 DPRINTK("ATAPI request sense\n");
2392
Jeff Garzika939c962005-10-05 17:09:16 -04002393 /* FIXME: is this needed? */
James Bottomley7ccd7202008-01-17 11:56:24 -06002394 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
Jeff Garzika939c962005-10-05 17:09:16 -04002395
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002396 ap->ops->tf_read(ap, &qc->tf);
2397
2398 /* fill these in, for the case where they are -not- overwritten */
2399 cmd->sense_buffer[0] = 0x70;
2400 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2401
2402 ata_qc_reinit(qc);
2403
Tejun Heo93f8fec2007-12-05 16:43:01 +09002404 /* setup sg table and init transfer direction */
akpm@linux-foundation.orgcadb7342008-01-15 16:01:52 -08002405 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
Tejun Heo93f8fec2007-12-05 16:43:01 +09002406 ata_sg_init(qc, &qc->sgent, 1);
Jeff Garzika939c962005-10-05 17:09:16 -04002407 qc->dma_dir = DMA_FROM_DEVICE;
2408
Tejun Heo6e7846e2006-02-12 23:32:58 +09002409 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002410 qc->cdb[0] = REQUEST_SENSE;
2411 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2412
2413 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2414 qc->tf.command = ATA_CMD_PACKET;
2415
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002416 if (ata_pio_use_silly(ap)) {
Tejun Heo0dc36882007-12-18 16:34:43 -05002417 qc->tf.protocol = ATAPI_PROT_DMA;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002418 qc->tf.feature |= ATAPI_PKT_DMA;
2419 } else {
Tejun Heo0dc36882007-12-18 16:34:43 -05002420 qc->tf.protocol = ATAPI_PROT_PIO;
Alan Cox2db78dd2007-10-02 13:53:04 -07002421 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2422 qc->tf.lbah = 0;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002423 }
Jeff Garzika939c962005-10-05 17:09:16 -04002424 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2425
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002426 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002427
Tejun Heo8e0e6942006-03-31 20:41:11 +09002428 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002429
2430 DPRINTK("EXIT\n");
2431}
2432
Tejun Heo77853bf2006-01-23 13:09:36 +09002433static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434{
2435 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002436 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437
Jeff Garzika7dac442005-10-30 04:44:42 -05002438 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002439
Tejun Heo246619d2006-05-15 20:58:16 +09002440 /* handle completion from new EH */
2441 if (unlikely(qc->ap->ops->error_handler &&
2442 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2443
2444 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2445 /* FIXME: not quite right; we don't want the
2446 * translation of taskfile registers into a
2447 * sense descriptors, since that's only
2448 * correct for ATA, not ATAPI
2449 */
Tejun Heo750426a2006-11-14 22:37:35 +09002450 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002451 }
2452
Tejun Heo22aac082006-08-08 14:08:59 +09002453 /* SCSI EH automatically locks door if sdev->locked is
2454 * set. Sometimes door lock request continues to
2455 * fail, for example, when no media is present. This
2456 * creates a loop - SCSI EH issues door lock which
2457 * fails and gets invoked again to acquire sense data
2458 * for the failed command.
2459 *
2460 * If door lock fails, always clear sdev->locked to
2461 * avoid this infinite loop.
2462 */
2463 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2464 qc->dev->sdev->locked = 0;
2465
Tejun Heo246619d2006-05-15 20:58:16 +09002466 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2467 qc->scsidone(cmd);
2468 ata_qc_free(qc);
2469 return;
2470 }
2471
2472 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002473 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002475 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002476 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002477 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002478 /* FIXME: not quite right; we don't want the
2479 * translation of taskfile registers into
2480 * a sense descriptors, since that's only
2481 * correct for ATA, not ATAPI
2482 */
Tejun Heo750426a2006-11-14 22:37:35 +09002483 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002484 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485 u8 *scsicmd = cmd->cmnd;
2486
Tony Battersbyfd71da42005-12-21 16:35:44 -05002487 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488 u8 *buf = NULL;
2489 unsigned int buflen;
Jeff Garzikb445c562008-02-29 19:10:51 -05002490 unsigned long flags;
2491
2492 local_irq_save(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493
2494 buflen = ata_scsi_rbuf_get(cmd, &buf);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002495
2496 /* ATAPI devices typically report zero for their SCSI version,
2497 * and sometimes deviate from the spec WRT response data
2498 * format. If SCSI version is reported as zero like normal,
2499 * then we make the following fixups: 1) Fake MMC-5 version,
2500 * to indicate to the Linux scsi midlayer this is a modern
2501 * device. 2) Ensure response data format / ATAPI information
2502 * are always correct.
2503 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002504 if (buf[2] == 0) {
2505 buf[2] = 0x5;
2506 buf[3] = 0x32;
2507 }
2508
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 ata_scsi_rbuf_put(cmd, buf);
Jeff Garzikb445c562008-02-29 19:10:51 -05002510
2511 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002513
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514 cmd->result = SAM_STAT_GOOD;
2515 }
2516
2517 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002518 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519}
2520/**
2521 * atapi_xlat - Initialize PACKET taskfile
2522 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 *
2524 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002525 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 *
2527 * RETURNS:
2528 * Zero on success, non-zero on failure.
2529 */
Tejun Heoad706992006-12-17 10:45:57 +09002530static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531{
Tejun Heo542b1442006-12-17 10:45:08 +09002532 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533 struct ata_device *dev = qc->dev;
2534 int using_pio = (dev->flags & ATA_DFLAG_PIO);
Tejun Heo542b1442006-12-17 10:45:08 +09002535 int nodata = (scmd->sc_data_direction == DMA_NONE);
Alan Cox2db78dd2007-10-02 13:53:04 -07002536 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537
Tejun Heo2e5704f2006-12-17 10:46:33 +09002538 memset(qc->cdb, 0, dev->cdb_len);
2539 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540
2541 qc->complete_fn = atapi_qc_complete;
2542
2543 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002544 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545 qc->tf.flags |= ATA_TFLAG_WRITE;
2546 DPRINTK("direction: write\n");
2547 }
2548
2549 qc->tf.command = ATA_CMD_PACKET;
Tejun Heoaacda372008-03-18 17:47:43 +09002550 ata_qc_set_pc_nbytes(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002552 /* check whether ATAPI DMA is safe */
2553 if (!using_pio && ata_check_atapi_dma(qc))
2554 using_pio = 1;
2555
Tejun Heoe1902222007-11-26 20:58:02 +09002556 /* Some controller variants snoop this value for Packet
2557 * transfers to do state machine and FIFO management. Thus we
2558 * want to set it properly, and for DMA where it is
2559 * effectively meaningless.
2560 */
Tejun Heoaacda372008-03-18 17:47:43 +09002561 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
Alan Cox2db78dd2007-10-02 13:53:04 -07002562
Tejun Heoe1902222007-11-26 20:58:02 +09002563 /* Most ATAPI devices which honor transfer chunk size don't
2564 * behave according to the spec when odd chunk size which
2565 * matches the transfer length is specified. If the number of
2566 * bytes to transfer is 2n+1. According to the spec, what
2567 * should happen is to indicate that 2n+1 is going to be
2568 * transferred and transfer 2n+2 bytes where the last byte is
2569 * padding.
2570 *
2571 * In practice, this doesn't happen. ATAPI devices first
2572 * indicate and transfer 2n bytes and then indicate and
2573 * transfer 2 bytes where the last byte is padding.
2574 *
2575 * This inconsistency confuses several controllers which
2576 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2577 * These controllers use actual number of transferred bytes to
2578 * update DMA poitner and transfer of 4n+2 bytes make those
2579 * controller push DMA pointer by 4n+4 bytes because SATA data
2580 * FISes are aligned to 4 bytes. This causes data corruption
2581 * and buffer overrun.
2582 *
2583 * Always setting nbytes to even number solves this problem
2584 * because then ATAPI devices don't have to split data at 2n
2585 * boundaries.
2586 */
2587 if (nbytes & 0x1)
2588 nbytes++;
2589
Alan Cox2db78dd2007-10-02 13:53:04 -07002590 qc->tf.lbam = (nbytes & 0xFF);
2591 qc->tf.lbah = (nbytes >> 8);
2592
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593 if (using_pio || nodata) {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002594 /* no data, or PIO data xfer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595 if (nodata)
Tejun Heo0dc36882007-12-18 16:34:43 -05002596 qc->tf.protocol = ATAPI_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597 else
Tejun Heo0dc36882007-12-18 16:34:43 -05002598 qc->tf.protocol = ATAPI_PROT_PIO;
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002599 } else {
2600 /* DMA data xfer */
Tejun Heo0dc36882007-12-18 16:34:43 -05002601 qc->tf.protocol = ATAPI_PROT_DMA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602 qc->tf.feature |= ATAPI_PKT_DMA;
2603
Tejun Heo91163002008-02-21 13:25:50 +09002604 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2605 (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002606 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 }
2609
Alan Cox2db78dd2007-10-02 13:53:04 -07002610
2611 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2612 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002613 return 0;
2614}
2615
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002616static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002617{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002618 if (ap->nr_pmp_links == 0) {
2619 if (likely(devno < ata_link_max_devices(&ap->link)))
2620 return &ap->link.device[devno];
2621 } else {
2622 if (likely(devno < ap->nr_pmp_links))
2623 return &ap->pmp_link[devno].device[0];
2624 }
2625
Tejun Heoab5b3a52006-05-31 18:27:34 +09002626 return NULL;
2627}
2628
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002629static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2630 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002631{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002632 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002633
Tejun Heo41bda9c2007-08-06 18:36:24 +09002634 /* skip commands not addressed to targets we simulate */
2635 if (ap->nr_pmp_links == 0) {
2636 if (unlikely(scsidev->channel || scsidev->lun))
2637 return NULL;
2638 devno = scsidev->id;
2639 } else {
2640 if (unlikely(scsidev->id || scsidev->lun))
2641 return NULL;
2642 devno = scsidev->channel;
2643 }
2644
2645 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002646}
2647
Linus Torvalds1da177e2005-04-16 15:20:36 -07002648/**
Brian King99ba9e02006-06-12 14:54:17 -05002649 * ata_scsi_dev_enabled - determine if device is enabled
2650 * @dev: ATA device
2651 *
2652 * Determine if commands should be sent to the specified device.
2653 *
2654 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002655 * spin_lock_irqsave(host lock)
Brian King99ba9e02006-06-12 14:54:17 -05002656 *
2657 * RETURNS:
2658 * 0 if commands are not allowed / 1 if commands are allowed
2659 */
2660
2661static int ata_scsi_dev_enabled(struct ata_device *dev)
2662{
2663 if (unlikely(!ata_dev_enabled(dev)))
2664 return 0;
2665
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002666 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
Brian King99ba9e02006-06-12 14:54:17 -05002667 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2668 ata_dev_printk(dev, KERN_WARNING,
2669 "WARNING: ATAPI is %s, device ignored.\n",
2670 atapi_enabled ? "not supported with this driver" : "disabled");
2671 return 0;
2672 }
2673 }
2674
2675 return 1;
2676}
2677
2678/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2680 * @ap: ATA port to which the device is attached
2681 * @scsidev: SCSI device from which we derive the ATA device
2682 *
2683 * Given various information provided in struct scsi_cmnd,
2684 * map that onto an ATA bus, and using that mapping
2685 * determine which ata_device is associated with the
2686 * SCSI command to be sent.
2687 *
2688 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002689 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002690 *
2691 * RETURNS:
2692 * Associated ATA device, or %NULL if not found.
2693 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002695ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002697 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698
Brian King99ba9e02006-06-12 14:54:17 -05002699 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002700 return NULL;
2701
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 return dev;
2703}
2704
Jeff Garzikb0955182005-05-12 15:45:22 -04002705/*
2706 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2707 * @byte1: Byte 1 from pass-thru CDB.
2708 *
2709 * RETURNS:
2710 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2711 */
2712static u8
2713ata_scsi_map_proto(u8 byte1)
2714{
2715 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002716 case 3: /* Non-data */
2717 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002718
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002719 case 6: /* DMA */
2720 case 10: /* UDMA Data-in */
2721 case 11: /* UDMA Data-Out */
2722 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002723
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002724 case 4: /* PIO Data-in */
2725 case 5: /* PIO Data-out */
2726 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002727
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002728 case 0: /* Hard Reset */
2729 case 1: /* SRST */
2730 case 8: /* Device Diagnostic */
2731 case 9: /* Device Reset */
2732 case 7: /* DMA Queued */
2733 case 12: /* FPDMA */
2734 case 15: /* Return Response Info */
2735 default: /* Reserved */
2736 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002737 }
2738
2739 return ATA_PROT_UNKNOWN;
2740}
2741
2742/**
2743 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2744 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002745 *
2746 * Handles either 12 or 16-byte versions of the CDB.
2747 *
2748 * RETURNS:
2749 * Zero on success, non-zero on failure.
2750 */
Tejun Heoad706992006-12-17 10:45:57 +09002751static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002752{
2753 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002754 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002755 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002756 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002757
Tejun Heo542b1442006-12-17 10:45:08 +09002758 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002759 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002760
Alan Coxae8d4ee2007-11-04 22:05:49 -05002761 /*
2762 * Filter TPM commands by default. These provide an
2763 * essentially uncontrolled encrypted "back door" between
2764 * applications and the disk. Set libata.allow_tpm=1 if you
2765 * have a real reason for wanting to use them. This ensures
2766 * that installed software cannot easily mess stuff up without
2767 * user intent. DVR type users will probably ship with this enabled
2768 * for movie content management.
2769 *
2770 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2771 * for this and should do in future but that it is not sufficient as
2772 * DCS is an optional feature set. Thus we also do the software filter
2773 * so that we comply with the TC consortium stated goal that the user
2774 * can turn off TC features of their system.
2775 */
2776 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2777 goto invalid_fld;
2778
Alan Coxf79d4092006-05-22 16:55:11 +01002779 /* We may not issue DMA commands if no DMA mode is set */
2780 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2781 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002782
2783 /*
2784 * 12 and 16 byte CDBs use different offsets to
2785 * provide the various register values.
2786 */
Tejun Heo542b1442006-12-17 10:45:08 +09002787 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002788 /*
2789 * 16-byte CDB - may contain extended commands.
2790 *
2791 * If that is the case, copy the upper byte register values.
2792 */
Tejun Heo542b1442006-12-17 10:45:08 +09002793 if (cdb[1] & 0x01) {
2794 tf->hob_feature = cdb[3];
2795 tf->hob_nsect = cdb[5];
2796 tf->hob_lbal = cdb[7];
2797 tf->hob_lbam = cdb[9];
2798 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002799 tf->flags |= ATA_TFLAG_LBA48;
2800 } else
2801 tf->flags &= ~ATA_TFLAG_LBA48;
2802
2803 /*
2804 * Always copy low byte, device and command registers.
2805 */
Tejun Heo542b1442006-12-17 10:45:08 +09002806 tf->feature = cdb[4];
2807 tf->nsect = cdb[6];
2808 tf->lbal = cdb[8];
2809 tf->lbam = cdb[10];
2810 tf->lbah = cdb[12];
2811 tf->device = cdb[13];
2812 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002813 } else {
2814 /*
2815 * 12-byte CDB - incapable of extended commands.
2816 */
2817 tf->flags &= ~ATA_TFLAG_LBA48;
2818
Tejun Heo542b1442006-12-17 10:45:08 +09002819 tf->feature = cdb[3];
2820 tf->nsect = cdb[4];
2821 tf->lbal = cdb[5];
2822 tf->lbam = cdb[6];
2823 tf->lbah = cdb[7];
2824 tf->device = cdb[8];
2825 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002826 }
Albert Leefa4453c2007-06-07 15:52:07 +08002827
2828 /* enforce correct master/slave bit */
2829 tf->device = dev->devno ?
2830 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002831
Albert Lee1dce5892007-06-07 15:49:22 +08002832 /* sanity check for pio multi commands */
2833 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2834 goto invalid_fld;
2835
2836 if (is_multi_taskfile(tf)) {
2837 unsigned int multi_count = 1 << (cdb[1] >> 5);
2838
2839 /* compare the passed through multi_count
2840 * with the cached multi_count of libata
2841 */
2842 if (multi_count != dev->multi_count)
2843 ata_dev_printk(dev, KERN_WARNING,
2844 "invalid multi_count %u ignored\n",
2845 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002846 }
Albert Lee1dce5892007-06-07 15:49:22 +08002847
Mark Lord5a5dbd12007-03-16 10:22:26 -04002848 /* READ/WRITE LONG use a non-standard sect_size */
2849 qc->sect_size = ATA_SECT_SIZE;
2850 switch (tf->command) {
2851 case ATA_CMD_READ_LONG:
2852 case ATA_CMD_READ_LONG_ONCE:
2853 case ATA_CMD_WRITE_LONG:
2854 case ATA_CMD_WRITE_LONG_ONCE:
2855 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2856 goto invalid_fld;
Boaz Harrosh71201652007-09-18 17:48:50 +02002857 qc->sect_size = scsi_bufflen(scmd);
Mark Lord5a5dbd12007-03-16 10:22:26 -04002858 }
2859
Jeff Garzikb0955182005-05-12 15:45:22 -04002860 /*
2861 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2862 * SET_FEATURES - XFER MODE must be preceded/succeeded
2863 * by an update to hardware-specific registers for each
2864 * controller (i.e. the reason for ->set_piomode(),
2865 * ->set_dmamode(), and ->post_set_mode() hooks).
2866 */
2867 if ((tf->command == ATA_CMD_SET_FEATURES)
2868 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002869 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002870
2871 /*
2872 * Set flags so that all registers will be written,
2873 * and pass on write indication (used for PIO/DMA
2874 * setup.)
2875 */
2876 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2877
Tejun Heo542b1442006-12-17 10:45:08 +09002878 if (scmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002879 tf->flags |= ATA_TFLAG_WRITE;
2880
2881 /*
2882 * Set transfer length.
2883 *
2884 * TODO: find out if we need to do more here to
2885 * cover scatter/gather case.
2886 */
Tejun Heoaacda372008-03-18 17:47:43 +09002887 ata_qc_set_pc_nbytes(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04002888
Tejun Heoe027bd32007-10-26 16:19:26 +09002889 /* request result TF and be quiet about device error */
2890 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
Tejun Heoe61e0672006-05-15 20:57:40 +09002891
Jeff Garzikb0955182005-05-12 15:45:22 -04002892 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002893
2894 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002895 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002896 /* "Invalid field in cdb" */
2897 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002898}
2899
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900/**
2901 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2902 * @dev: ATA device
2903 * @cmd: SCSI command opcode to consider
2904 *
2905 * Look up the SCSI command given, and determine whether the
2906 * SCSI command is to be translated or simulated.
2907 *
2908 * RETURNS:
2909 * Pointer to translation function if possible, %NULL if not.
2910 */
2911
2912static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2913{
2914 switch (cmd) {
2915 case READ_6:
2916 case READ_10:
2917 case READ_16:
2918
2919 case WRITE_6:
2920 case WRITE_10:
2921 case WRITE_16:
2922 return ata_scsi_rw_xlat;
2923
2924 case SYNCHRONIZE_CACHE:
2925 if (ata_try_flush_cache(dev))
2926 return ata_scsi_flush_xlat;
2927 break;
2928
2929 case VERIFY:
2930 case VERIFY_16:
2931 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002932
2933 case ATA_12:
2934 case ATA_16:
2935 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002936
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002937 case START_STOP:
2938 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002939 }
2940
2941 return NULL;
2942}
2943
2944/**
2945 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2946 * @ap: ATA port to which the command was being sent
2947 * @cmd: SCSI command to dump
2948 *
2949 * Prints the contents of a SCSI command via printk().
2950 */
2951
2952static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2953 struct scsi_cmnd *cmd)
2954{
2955#ifdef ATA_DEBUG
2956 struct scsi_device *scsidev = cmd->device;
2957 u8 *scsicmd = cmd->cmnd;
2958
2959 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09002960 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961 scsidev->channel, scsidev->id, scsidev->lun,
2962 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2963 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2964 scsicmd[8]);
2965#endif
2966}
2967
Tejun Heo542b1442006-12-17 10:45:08 +09002968static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09002969 void (*done)(struct scsi_cmnd *),
2970 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06002971{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002972 u8 scsi_op = scmd->cmnd[0];
2973 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09002974 int rc = 0;
2975
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002976 if (dev->class == ATA_DEV_ATA) {
2977 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2978 goto bad_cdb_len;
2979
2980 xlat_func = ata_get_xlat_func(dev, scsi_op);
2981 } else {
2982 if (unlikely(!scmd->cmd_len))
2983 goto bad_cdb_len;
2984
2985 xlat_func = NULL;
2986 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2987 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09002988 int len = COMMAND_SIZE(scsi_op);
2989 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002990 goto bad_cdb_len;
2991
2992 xlat_func = atapi_xlat;
2993 } else {
2994 /* ATA_16 passthru, treat as an ATA command */
2995 if (unlikely(scmd->cmd_len > 16))
2996 goto bad_cdb_len;
2997
2998 xlat_func = ata_get_xlat_func(dev, scsi_op);
2999 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09003000 }
3001
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003002 if (xlat_func)
3003 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3004 else
3005 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09003006
3007 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09003008
3009 bad_cdb_len:
3010 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3011 scmd->cmd_len, scsi_op, dev->cdb_len);
3012 scmd->result = DID_ERROR << 16;
3013 done(scmd);
3014 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06003015}
3016
Linus Torvalds1da177e2005-04-16 15:20:36 -07003017/**
3018 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3019 * @cmd: SCSI command to be sent
3020 * @done: Completion function, called when command is complete
3021 *
3022 * In some cases, this function translates SCSI commands into
3023 * ATA taskfiles, and queues the taskfiles to be sent to
3024 * hardware. In other cases, this function simulates a
3025 * SCSI device by evaluating and responding to certain
3026 * SCSI commands. This creates the overall effect of
3027 * ATA and ATAPI devices appearing as SCSI devices.
3028 *
3029 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003030 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031 *
3032 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09003033 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3034 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003036int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3037{
3038 struct ata_port *ap;
3039 struct ata_device *dev;
3040 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05003041 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09003042 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043
Jeff Garzik35bb94b2006-04-11 13:12:34 -04003044 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003045
3046 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003047 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003048
3049 ata_scsi_dump_cdb(ap, cmd);
3050
3051 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003052 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09003053 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06003054 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003055 cmd->result = (DID_BAD_TARGET << 16);
3056 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003057 }
3058
Jeff Garzikba6a1302006-06-22 23:46:10 -04003059 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05003060 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09003061 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003062}
3063
3064/**
3065 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003066 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003067 * @cmd: SCSI command being sent to device.
3068 * @done: SCSI command completion function.
3069 *
3070 * Interprets and directly executes a select list of SCSI commands
3071 * that can be handled internally.
3072 *
3073 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003074 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003075 */
3076
Tejun Heo3373efd2006-05-15 20:57:53 +09003077void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078 void (*done)(struct scsi_cmnd *))
3079{
3080 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04003081 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04003082 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003083
Tejun Heo9a3dccc2006-01-06 09:56:18 +01003084 args.dev = dev;
3085 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086 args.cmd = cmd;
3087 args.done = done;
3088
3089 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003090 /* TODO: worth improving? */
3091 case FORMAT_UNIT:
3092 ata_scsi_invalid_field(cmd, done);
3093 break;
3094
3095 case INQUIRY:
3096 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04003097 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003098 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3099 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3100 else switch (scsicmd[2]) {
3101 case 0x00:
3102 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003104 case 0x80:
3105 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003107 case 0x83:
3108 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003110 case 0x89:
3111 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003112 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003114 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003116 }
3117 break;
3118
3119 case MODE_SENSE:
3120 case MODE_SENSE_10:
3121 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3122 break;
3123
3124 case MODE_SELECT: /* unconditionally return */
3125 case MODE_SELECT_10: /* bad-field-in-cdb */
3126 ata_scsi_invalid_field(cmd, done);
3127 break;
3128
3129 case READ_CAPACITY:
3130 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3131 break;
3132
3133 case SERVICE_ACTION_IN:
3134 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3135 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3136 else
3137 ata_scsi_invalid_field(cmd, done);
3138 break;
3139
3140 case REPORT_LUNS:
3141 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3142 break;
3143
3144 case REQUEST_SENSE:
3145 ata_scsi_set_sense(cmd, 0, 0, 0);
3146 cmd->result = (DRIVER_SENSE << 24);
3147 done(cmd);
3148 break;
3149
3150 /* if we reach this, then writeback caching is disabled,
3151 * turning this into a no-op.
3152 */
3153 case SYNCHRONIZE_CACHE:
3154 /* fall through */
3155
3156 /* no-op's, complete with success */
3157 case REZERO_UNIT:
3158 case SEEK_6:
3159 case SEEK_10:
3160 case TEST_UNIT_READY:
3161 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3162 break;
3163
3164 case SEND_DIAGNOSTIC:
3165 tmp8 = scsicmd[1] & ~(1 << 3);
3166 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3167 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3168 else
3169 ata_scsi_invalid_field(cmd, done);
3170 break;
3171
3172 /* all other commands */
3173 default:
3174 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3175 /* "Invalid command operation code" */
3176 done(cmd);
3177 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003178 }
3179}
3180
Tejun Heof3187192007-04-17 23:44:07 +09003181int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3182{
3183 int i, rc;
3184
3185 for (i = 0; i < host->n_ports; i++) {
3186 struct ata_port *ap = host->ports[i];
3187 struct Scsi_Host *shost;
3188
3189 rc = -ENOMEM;
3190 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3191 if (!shost)
3192 goto err_alloc;
3193
3194 *(struct ata_port **)&shost->hostdata[0] = ap;
3195 ap->scsi_host = shost;
3196
3197 shost->transportt = &ata_scsi_transport_template;
3198 shost->unique_id = ap->print_id;
3199 shost->max_id = 16;
3200 shost->max_lun = 1;
3201 shost->max_channel = 1;
3202 shost->max_cmd_len = 16;
3203
Tejun Heo31cc23b2007-09-23 13:14:12 +09003204 /* Schedule policy is determined by ->qc_defer()
3205 * callback and it needs to see every deferred qc.
3206 * Set host_blocked to 1 to prevent SCSI midlayer from
3207 * automatically deferring requests.
3208 */
3209 shost->max_host_blocked = 1;
3210
Tejun Heof3187192007-04-17 23:44:07 +09003211 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3212 if (rc)
3213 goto err_add;
3214 }
3215
3216 return 0;
3217
3218 err_add:
3219 scsi_host_put(host->ports[i]->scsi_host);
3220 err_alloc:
3221 while (--i >= 0) {
3222 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3223
3224 scsi_remove_host(shost);
3225 scsi_host_put(shost);
3226 }
3227 return rc;
3228}
3229
Tejun Heo1ae46312007-07-16 14:29:40 +09003230void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003231{
Tejun Heo1ae46312007-07-16 14:29:40 +09003232 int tries = 5;
3233 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003234 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003235 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003236
Tejun Heo198e0fe2006-04-02 18:51:52 +09003237 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003238 return;
3239
Tejun Heo1ae46312007-07-16 14:29:40 +09003240 repeat:
Tejun Heo41bda9c2007-08-06 18:36:24 +09003241 ata_port_for_each_link(link, ap) {
3242 ata_link_for_each_dev(dev, link) {
3243 struct scsi_device *sdev;
3244 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003245
Tejun Heo41bda9c2007-08-06 18:36:24 +09003246 if (!ata_dev_enabled(dev) || dev->sdev)
3247 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003248
Tejun Heo41bda9c2007-08-06 18:36:24 +09003249 if (ata_is_host_link(link))
3250 id = dev->devno;
3251 else
3252 channel = link->pmp;
3253
3254 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3255 NULL);
3256 if (!IS_ERR(sdev)) {
3257 dev->sdev = sdev;
3258 scsi_device_put(sdev);
3259 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003260 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003261 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003262
3263 /* If we scanned while EH was in progress or allocation
3264 * failure occurred, scan would have failed silently. Check
3265 * whether all devices are attached.
3266 */
Tejun Heo41bda9c2007-08-06 18:36:24 +09003267 ata_port_for_each_link(link, ap) {
3268 ata_link_for_each_dev(dev, link) {
3269 if (ata_dev_enabled(dev) && !dev->sdev)
3270 goto exit_loop;
3271 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003272 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003273 exit_loop:
3274 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003275 return;
3276
3277 /* we're missing some SCSI devices */
3278 if (sync) {
3279 /* If caller requested synchrnous scan && we've made
3280 * any progress, sleep briefly and repeat.
3281 */
3282 if (dev != last_failed_dev) {
3283 msleep(100);
3284 last_failed_dev = dev;
3285 goto repeat;
3286 }
3287
3288 /* We might be failing to detect boot device, give it
3289 * a few more chances.
3290 */
3291 if (--tries) {
3292 msleep(100);
3293 goto repeat;
3294 }
3295
3296 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3297 "failed without making any progress,\n"
3298 " switching to async\n");
3299 }
3300
3301 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3302 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003303}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003304
3305/**
3306 * ata_scsi_offline_dev - offline attached SCSI device
3307 * @dev: ATA device to offline attached SCSI device for
3308 *
3309 * This function is called from ata_eh_hotplug() and responsible
3310 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003311 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003312 * against clearing.
3313 *
3314 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003315 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003316 *
3317 * RETURNS:
3318 * 1 if attached SCSI device exists, 0 otherwise.
3319 */
3320int ata_scsi_offline_dev(struct ata_device *dev)
3321{
3322 if (dev->sdev) {
3323 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3324 return 1;
3325 }
3326 return 0;
3327}
Tejun Heo580b2102006-05-31 18:28:05 +09003328
3329/**
3330 * ata_scsi_remove_dev - remove attached SCSI device
3331 * @dev: ATA device to remove attached SCSI device for
3332 *
3333 * This function is called from ata_eh_scsi_hotplug() and
3334 * responsible for removing the SCSI device attached to @dev.
3335 *
3336 * LOCKING:
3337 * Kernel thread context (may sleep).
3338 */
3339static void ata_scsi_remove_dev(struct ata_device *dev)
3340{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003341 struct ata_port *ap = dev->link->ap;
Tejun Heo580b2102006-05-31 18:28:05 +09003342 struct scsi_device *sdev;
3343 unsigned long flags;
3344
3345 /* Alas, we need to grab scan_mutex to ensure SCSI device
3346 * state doesn't change underneath us and thus
3347 * scsi_device_get() always succeeds. The mutex locking can
3348 * be removed if there is __scsi_device_get() interface which
3349 * increments reference counts regardless of device state.
3350 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003351 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003352 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003353
Jeff Garzikcca39742006-08-24 03:19:22 -04003354 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b2102006-05-31 18:28:05 +09003355 sdev = dev->sdev;
3356 dev->sdev = NULL;
3357
3358 if (sdev) {
3359 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003360 * away underneath us after the host lock and
Tejun Heo580b2102006-05-31 18:28:05 +09003361 * scan_mutex are released. Hold onto it.
3362 */
3363 if (scsi_device_get(sdev) == 0) {
3364 /* The following ensures the attached sdev is
3365 * offline on return from ata_scsi_offline_dev()
3366 * regardless it wins or loses the race
3367 * against this function.
3368 */
3369 scsi_device_set_state(sdev, SDEV_OFFLINE);
3370 } else {
3371 WARN_ON(1);
3372 sdev = NULL;
3373 }
3374 }
3375
Jeff Garzikba6a1302006-06-22 23:46:10 -04003376 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003377 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003378
3379 if (sdev) {
3380 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3381 sdev->sdev_gendev.bus_id);
3382
3383 scsi_remove_device(sdev);
3384 scsi_device_put(sdev);
3385 }
3386}
3387
Tejun Heo41bda9c2007-08-06 18:36:24 +09003388static void ata_scsi_handle_link_detach(struct ata_link *link)
3389{
3390 struct ata_port *ap = link->ap;
3391 struct ata_device *dev;
3392
3393 ata_link_for_each_dev(dev, link) {
3394 unsigned long flags;
3395
3396 if (!(dev->flags & ATA_DFLAG_DETACHED))
3397 continue;
3398
3399 spin_lock_irqsave(ap->lock, flags);
3400 dev->flags &= ~ATA_DFLAG_DETACHED;
3401 spin_unlock_irqrestore(ap->lock, flags);
3402
3403 ata_scsi_remove_dev(dev);
3404 }
3405}
3406
Tejun Heo580b2102006-05-31 18:28:05 +09003407/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003408 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003409 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003410 *
3411 * Tell the block layer to send a media change notification
3412 * event.
3413 *
3414 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003415 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003416 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003417void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003418{
Tejun Heo854c73a2007-09-23 13:14:11 +09003419 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003420 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3421 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003422}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003423
3424/**
Tejun Heo580b2102006-05-31 18:28:05 +09003425 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003426 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b2102006-05-31 18:28:05 +09003427 *
3428 * Perform SCSI part of hotplug. It's executed from a separate
3429 * workqueue after EH completes. This is necessary because SCSI
3430 * hot plugging requires working EH and hot unplugging is
3431 * synchronized with hot plugging with a mutex.
3432 *
3433 * LOCKING:
3434 * Kernel thread context (may sleep).
3435 */
David Howells65f27f32006-11-22 14:55:48 +00003436void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b2102006-05-31 18:28:05 +09003437{
David Howells65f27f32006-11-22 14:55:48 +00003438 struct ata_port *ap =
3439 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003440 int i;
Tejun Heo580b2102006-05-31 18:28:05 +09003441
Tejun Heob51e9e52006-06-29 01:29:30 +09003442 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b2102006-05-31 18:28:05 +09003443 DPRINTK("ENTER/EXIT - unloading\n");
3444 return;
3445 }
3446
3447 DPRINTK("ENTER\n");
3448
Tejun Heo41bda9c2007-08-06 18:36:24 +09003449 /* Unplug detached devices. We cannot use link iterator here
3450 * because PMP links have to be scanned even if PMP is
3451 * currently not attached. Iterate manually.
3452 */
3453 ata_scsi_handle_link_detach(&ap->link);
3454 if (ap->pmp_link)
3455 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3456 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b2102006-05-31 18:28:05 +09003457
3458 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003459 ata_scsi_scan_host(ap, 0);
Tejun Heo580b2102006-05-31 18:28:05 +09003460
3461 DPRINTK("EXIT\n");
3462}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003463
3464/**
3465 * ata_scsi_user_scan - indication for user-initiated bus scan
3466 * @shost: SCSI host to scan
3467 * @channel: Channel to scan
3468 * @id: ID to scan
3469 * @lun: LUN to scan
3470 *
3471 * This function is called when user explicitly requests bus
3472 * scan. Set probe pending flag and invoke EH.
3473 *
3474 * LOCKING:
3475 * SCSI layer (we don't care)
3476 *
3477 * RETURNS:
3478 * Zero.
3479 */
3480static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3481 unsigned int id, unsigned int lun)
3482{
3483 struct ata_port *ap = ata_shost_to_port(shost);
3484 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003485 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003486
3487 if (!ap->ops->error_handler)
3488 return -EOPNOTSUPP;
3489
Tejun Heo41bda9c2007-08-06 18:36:24 +09003490 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003491 return -EINVAL;
3492
Tejun Heo41bda9c2007-08-06 18:36:24 +09003493 if (ap->nr_pmp_links == 0) {
3494 if (channel != SCAN_WILD_CARD && channel)
3495 return -EINVAL;
3496 devno = id;
3497 } else {
3498 if (id != SCAN_WILD_CARD && id)
3499 return -EINVAL;
3500 devno = channel;
3501 }
3502
Jeff Garzikba6a1302006-06-22 23:46:10 -04003503 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003504
Tejun Heo41bda9c2007-08-06 18:36:24 +09003505 if (devno == SCAN_WILD_CARD) {
3506 struct ata_link *link;
3507
3508 ata_port_for_each_link(link, ap) {
3509 struct ata_eh_info *ehi = &link->eh_info;
Tejun Heob558edd2008-01-24 00:05:14 +09003510 ehi->probe_mask |= ATA_ALL_DEVICES;
Tejun Heocf480622008-01-24 00:05:14 +09003511 ehi->action |= ATA_EH_RESET;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003512 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003513 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003514 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003515
3516 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003517 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003518 ehi->probe_mask |= 1 << dev->devno;
Tejun Heocf480622008-01-24 00:05:14 +09003519 ehi->action |= ATA_EH_RESET;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003520 } else
3521 rc = -EINVAL;
3522 }
3523
Tejun Heo309afcb2006-09-30 18:07:17 +09003524 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003525 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003526 spin_unlock_irqrestore(ap->lock, flags);
3527 ata_port_wait_eh(ap);
3528 } else
3529 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003530
3531 return rc;
3532}
zhao, forrest3057ac32006-06-12 12:01:34 +08003533
3534/**
Tejun Heod0171262006-06-12 22:51:14 +09003535 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003536 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003537 *
Tejun Heod0171262006-06-12 22:51:14 +09003538 * After ATA pass thru (SAT) commands are executed successfully,
3539 * libata need to propagate the changes to SCSI layer. This
3540 * function must be executed from ata_aux_wq such that sdev
3541 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003542 *
Tejun Heod0171262006-06-12 22:51:14 +09003543 * LOCKING:
3544 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003545 */
David Howells65f27f32006-11-22 14:55:48 +00003546void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003547{
David Howells65f27f32006-11-22 14:55:48 +00003548 struct ata_port *ap =
3549 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003550 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003551 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003552 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003553
Tejun Heof84e7e42006-11-22 11:21:31 +09003554 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003555
Tejun Heo41bda9c2007-08-06 18:36:24 +09003556 ata_port_for_each_link(link, ap) {
3557 ata_link_for_each_dev(dev, link) {
3558 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003559
Tejun Heo41bda9c2007-08-06 18:36:24 +09003560 if (!ata_dev_enabled(dev) || !sdev)
3561 continue;
3562 if (scsi_device_get(sdev))
3563 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003564
Tejun Heo41bda9c2007-08-06 18:36:24 +09003565 spin_unlock_irqrestore(ap->lock, flags);
3566 scsi_rescan_device(&(sdev->sdev_gendev));
3567 scsi_device_put(sdev);
3568 spin_lock_irqsave(ap->lock, flags);
3569 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003570 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003571
3572 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003573}
Brian King80289162006-08-07 14:27:31 -05003574
3575/**
3576 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003577 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003578 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003579 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003580 *
3581 * LOCKING:
3582 * PCI/etc. bus probe sem.
3583 *
3584 * RETURNS:
3585 * ata_port pointer on success / NULL on failure.
3586 */
3587
Jeff Garzikcca39742006-08-24 03:19:22 -04003588struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003589 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003590 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003591{
Tejun Heof3187192007-04-17 23:44:07 +09003592 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003593
Tejun Heof3187192007-04-17 23:44:07 +09003594 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003595 if (!ap)
3596 return NULL;
3597
Tejun Heof3187192007-04-17 23:44:07 +09003598 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003599 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003600 ap->pio_mask = port_info->pio_mask;
3601 ap->mwdma_mask = port_info->mwdma_mask;
3602 ap->udma_mask = port_info->udma_mask;
3603 ap->flags |= port_info->flags;
3604 ap->ops = port_info->port_ops;
3605 ap->cbl = ATA_CBL_SATA;
3606
Brian King80289162006-08-07 14:27:31 -05003607 return ap;
3608}
3609EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3610
3611/**
3612 * ata_sas_port_start - Set port up for dma.
3613 * @ap: Port to initialize
3614 *
3615 * Called just after data structures for each port are
James Bottomleydde20202008-02-19 11:36:56 +01003616 * initialized.
Brian King80289162006-08-07 14:27:31 -05003617 *
3618 * May be used as the port_start() entry in ata_port_operations.
3619 *
3620 * LOCKING:
3621 * Inherited from caller.
3622 */
3623int ata_sas_port_start(struct ata_port *ap)
3624{
James Bottomleydde20202008-02-19 11:36:56 +01003625 return 0;
Brian King80289162006-08-07 14:27:31 -05003626}
3627EXPORT_SYMBOL_GPL(ata_sas_port_start);
3628
3629/**
3630 * ata_port_stop - Undo ata_sas_port_start()
3631 * @ap: Port to shut down
3632 *
Brian King80289162006-08-07 14:27:31 -05003633 * May be used as the port_stop() entry in ata_port_operations.
3634 *
3635 * LOCKING:
3636 * Inherited from caller.
3637 */
3638
3639void ata_sas_port_stop(struct ata_port *ap)
3640{
Brian King80289162006-08-07 14:27:31 -05003641}
3642EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3643
3644/**
3645 * ata_sas_port_init - Initialize a SATA device
3646 * @ap: SATA port to initialize
3647 *
3648 * LOCKING:
3649 * PCI/etc. bus probe sem.
3650 *
3651 * RETURNS:
3652 * Zero on success, non-zero on error.
3653 */
3654
3655int ata_sas_port_init(struct ata_port *ap)
3656{
3657 int rc = ap->ops->port_start(ap);
3658
Tejun Heof3187192007-04-17 23:44:07 +09003659 if (!rc) {
3660 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003661 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003662 }
Brian King80289162006-08-07 14:27:31 -05003663
3664 return rc;
3665}
3666EXPORT_SYMBOL_GPL(ata_sas_port_init);
3667
3668/**
3669 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3670 * @ap: SATA port to destroy
3671 *
3672 */
3673
3674void ata_sas_port_destroy(struct ata_port *ap)
3675{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003676 if (ap->ops->port_stop)
3677 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003678 kfree(ap);
3679}
3680EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3681
3682/**
3683 * ata_sas_slave_configure - Default slave_config routine for libata devices
3684 * @sdev: SCSI device to configure
3685 * @ap: ATA port to which SCSI device is attached
3686 *
3687 * RETURNS:
3688 * Zero.
3689 */
3690
3691int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3692{
3693 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003694 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003695 return 0;
3696}
3697EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3698
3699/**
3700 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3701 * @cmd: SCSI command to be sent
3702 * @done: Completion function, called when command is complete
3703 * @ap: ATA port to which the command is being sent
3704 *
3705 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003706 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3707 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003708 */
3709
3710int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3711 struct ata_port *ap)
3712{
Brian King08475a12006-11-20 13:51:56 -06003713 int rc = 0;
3714
Brian King80289162006-08-07 14:27:31 -05003715 ata_scsi_dump_cdb(ap, cmd);
3716
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003717 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3718 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003719 else {
3720 cmd->result = (DID_BAD_TARGET << 16);
3721 done(cmd);
3722 }
Brian King08475a12006-11-20 13:51:56 -06003723 return rc;
Brian King80289162006-08-07 14:27:31 -05003724}
3725EXPORT_SYMBOL_GPL(ata_sas_queuecmd);