blob: 14daf4848f09add8d0e7e90659251fd25afcc649 [file] [log] [blame]
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
Boaz Harrosh71201652007-09-18 17:48:50 +0200520 qc->__sg = scsi_sglist(cmd);
521 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
530/**
Jeff Garzikb0955182005-05-12 15:45:22 -0400531 * ata_dump_status - user friendly display of error info
532 * @id: id of the port in question
533 * @tf: ptr to filled out taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 *
Jeff Garzikb0955182005-05-12 15:45:22 -0400535 * Decode and dump the ATA error/status registers for the user so
536 * that they have some idea what really happened at the non
537 * make-believe layer.
538 *
539 * LOCKING:
540 * inherited from caller
541 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100542static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
Jeff Garzikb0955182005-05-12 15:45:22 -0400543{
544 u8 stat = tf->command, err = tf->feature;
545
546 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
547 if (stat & ATA_BUSY) {
548 printk("Busy }\n"); /* Data is not valid in this case */
549 } else {
550 if (stat & 0x40) printk("DriveReady ");
551 if (stat & 0x20) printk("DeviceFault ");
552 if (stat & 0x10) printk("SeekComplete ");
553 if (stat & 0x08) printk("DataRequest ");
554 if (stat & 0x04) printk("CorrectedError ");
555 if (stat & 0x02) printk("Index ");
556 if (stat & 0x01) printk("Error ");
557 printk("}\n");
558
559 if (err) {
560 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
561 if (err & 0x04) printk("DriveStatusError ");
562 if (err & 0x80) {
563 if (err & 0x04) printk("BadCRC ");
564 else printk("Sector ");
565 }
566 if (err & 0x40) printk("UncorrectableError ");
567 if (err & 0x10) printk("SectorIdNotFound ");
568 if (err & 0x02) printk("TrackZeroNotFound ");
569 if (err & 0x01) printk("AddrMarkNotFound ");
570 printk("}\n");
571 }
572 }
573}
574
575/**
576 * ata_to_sense_error - convert ATA error to SCSI error
Randy Dunlap8e8b77d2005-11-01 21:29:27 -0800577 * @id: ATA device number
Jeff Garzikb0955182005-05-12 15:45:22 -0400578 * @drv_stat: value contained in ATA status register
579 * @drv_err: value contained in ATA error register
580 * @sk: the sense key we'll fill out
581 * @asc: the additional sense code we'll fill out
582 * @ascq: the additional sense code qualifier we'll fill out
Tejun Heo246619d2006-05-15 20:58:16 +0900583 * @verbose: be verbose
Jeff Garzikb0955182005-05-12 15:45:22 -0400584 *
585 * Converts an ATA error into a SCSI error. Fill out pointers to
586 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
587 * format sense blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 *
589 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400590 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 */
Adrian Bunk7102d232007-01-04 00:09:36 +0100592static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
593 u8 *asc, u8 *ascq, int verbose)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594{
Jeff Garzikb0955182005-05-12 15:45:22 -0400595 int i;
Jeff Garzikffe75ef2005-10-09 10:40:44 -0400596
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 /* Based on the 3ware driver translation table */
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100598 static const unsigned char sense_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 /* BBD|ECC|ID|MAR */
600 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
601 /* BBD|ECC|ID */
602 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
603 /* ECC|MC|MARK */
604 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
605 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
606 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
607 /* MC|ID|ABRT|TRK0|MARK */
608 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
609 /* MCR|MARK */
610 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
611 /* Bad address mark */
612 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
613 /* TRK0 */
614 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
615 /* Abort & !ICRC */
616 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
617 /* Media change request */
618 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
619 /* SRV */
620 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
621 /* Media change */
622 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
623 /* ECC */
624 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
625 /* BBD - block marked bad */
626 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
627 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
628 };
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100629 static const unsigned char stat_table[][4] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 /* Must be first because BUSY means no other bits valid */
631 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
632 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
633 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
634 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
635 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
636 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 /*
639 * Is this an error we can process/parse
640 */
Jeff Garzikb0955182005-05-12 15:45:22 -0400641 if (drv_stat & ATA_BUSY) {
642 drv_err = 0; /* Ignore the err bits, they're invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
Jeff Garzikb0955182005-05-12 15:45:22 -0400645 if (drv_err) {
646 /* Look for drv_err */
647 for (i = 0; sense_table[i][0] != 0xFF; i++) {
648 /* Look for best matches first */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500649 if ((sense_table[i][0] & drv_err) ==
Jeff Garzikb0955182005-05-12 15:45:22 -0400650 sense_table[i][0]) {
651 *sk = sense_table[i][1];
652 *asc = sense_table[i][2];
653 *ascq = sense_table[i][3];
654 goto translate_done;
655 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400657 /* No immediate match */
Tejun Heo246619d2006-05-15 20:58:16 +0900658 if (verbose)
659 printk(KERN_WARNING "ata%u: no sense translation for "
660 "error 0x%02x\n", id, drv_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 /* Fall back to interpreting status bits */
Jeff Garzikb0955182005-05-12 15:45:22 -0400664 for (i = 0; stat_table[i][0] != 0xFF; i++) {
665 if (stat_table[i][0] & drv_stat) {
666 *sk = stat_table[i][1];
667 *asc = stat_table[i][2];
668 *ascq = stat_table[i][3];
669 goto translate_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 }
Jeff Garzikb0955182005-05-12 15:45:22 -0400672 /* No error? Undecoded? */
Tejun Heo246619d2006-05-15 20:58:16 +0900673 if (verbose)
674 printk(KERN_WARNING "ata%u: no sense translation for "
675 "status: 0x%02x\n", id, drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Alan Cox2d202022006-03-21 15:53:46 +0000677 /* We need a sensible error return here, which is tricky, and one
678 that won't cause people to do things like return a disk wrongly */
679 *sk = ABORTED_COMMAND;
680 *asc = 0x00;
681 *ascq = 0x00;
Jeff Garzikb0955182005-05-12 15:45:22 -0400682
683 translate_done:
Tejun Heo246619d2006-05-15 20:58:16 +0900684 if (verbose)
685 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
686 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
687 id, drv_stat, drv_err, *sk, *asc, *ascq);
Jeff Garzikb0955182005-05-12 15:45:22 -0400688 return;
689}
690
691/*
Tejun Heo750426a2006-11-14 22:37:35 +0900692 * ata_gen_passthru_sense - Generate check condition sense block.
Jeff Garzikb0955182005-05-12 15:45:22 -0400693 * @qc: Command that completed.
694 *
695 * This function is specific to the ATA descriptor format sense
696 * block specified for the ATA pass through commands. Regardless
697 * of whether the command errored or not, return a sense
698 * block. Copy all controller registers into the sense
699 * block. Clear sense key, ASC & ASCQ if there is no error.
700 *
701 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900702 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400703 */
Tejun Heo750426a2006-11-14 22:37:35 +0900704static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400705{
706 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900707 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400708 unsigned char *sb = cmd->sense_buffer;
709 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900710 int verbose = qc->ap->ops->error_handler == NULL;
Jeff Garzikb0955182005-05-12 15:45:22 -0400711
712 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
713
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400714 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400715
716 /*
Jeff Garzikb0955182005-05-12 15:45:22 -0400717 * Use ata_to_sense_error() to map status register bits
718 * onto sense key, asc & ascq.
719 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900720 if (qc->err_mask ||
721 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900722 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heo246619d2006-05-15 20:58:16 +0900723 &sb[1], &sb[2], &sb[3], verbose);
Jeff Garzikb0955182005-05-12 15:45:22 -0400724 sb[1] &= 0x0f;
725 }
726
727 /*
728 * Sense data is current and format is descriptor.
729 */
730 sb[0] = 0x72;
731
732 desc[0] = 0x09;
733
Tejun Heof38621b2006-11-14 22:37:35 +0900734 /* set length of additional sense data */
735 sb[7] = 14;
736 desc[1] = 12;
Jeff Garzikb0955182005-05-12 15:45:22 -0400737
738 /*
739 * Copy registers into sense buffer.
740 */
741 desc[2] = 0x00;
742 desc[3] = tf->feature; /* == error reg */
743 desc[5] = tf->nsect;
744 desc[7] = tf->lbal;
745 desc[9] = tf->lbam;
746 desc[11] = tf->lbah;
747 desc[12] = tf->device;
748 desc[13] = tf->command; /* == status reg */
749
750 /*
751 * Fill in Extend bit, and the high order bytes
752 * if applicable.
753 */
754 if (tf->flags & ATA_TFLAG_LBA48) {
755 desc[2] |= 0x01;
756 desc[4] = tf->hob_nsect;
757 desc[6] = tf->hob_lbal;
758 desc[8] = tf->hob_lbam;
759 desc[10] = tf->hob_lbah;
760 }
761}
762
763/**
Tejun Heo750426a2006-11-14 22:37:35 +0900764 * ata_gen_ata_sense - generate a SCSI fixed sense block
Jeff Garzikb0955182005-05-12 15:45:22 -0400765 * @qc: Command that we are erroring out
766 *
Tejun Heod25614b2006-11-14 22:37:35 +0900767 * Generate sense block for a failed ATA command @qc. Descriptor
768 * format is used to accomodate LBA48 block address.
Jeff Garzikb0955182005-05-12 15:45:22 -0400769 *
770 * LOCKING:
Tejun Heo750426a2006-11-14 22:37:35 +0900771 * None.
Jeff Garzikb0955182005-05-12 15:45:22 -0400772 */
Tejun Heo750426a2006-11-14 22:37:35 +0900773static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -0400774{
Tejun Heod25614b2006-11-14 22:37:35 +0900775 struct ata_device *dev = qc->dev;
Jeff Garzikb0955182005-05-12 15:45:22 -0400776 struct scsi_cmnd *cmd = qc->scsicmd;
Tejun Heoe61e0672006-05-15 20:57:40 +0900777 struct ata_taskfile *tf = &qc->result_tf;
Jeff Garzikb0955182005-05-12 15:45:22 -0400778 unsigned char *sb = cmd->sense_buffer;
Tejun Heod25614b2006-11-14 22:37:35 +0900779 unsigned char *desc = sb + 8;
Tejun Heo246619d2006-05-15 20:58:16 +0900780 int verbose = qc->ap->ops->error_handler == NULL;
Tejun Heod25614b2006-11-14 22:37:35 +0900781 u64 block;
Jeff Garzikb0955182005-05-12 15:45:22 -0400782
783 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
784
Jeff Garzik0e5dec42005-10-06 09:40:20 -0400785 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
Jeff Garzikb0955182005-05-12 15:45:22 -0400786
Tejun Heod25614b2006-11-14 22:37:35 +0900787 /* sense data is current and format is descriptor */
788 sb[0] = 0x72;
789
790 /* Use ata_to_sense_error() to map status register bits
Jeff Garzikb0955182005-05-12 15:45:22 -0400791 * onto sense key, asc & ascq.
792 */
Tejun Heo058e55e2006-04-02 18:51:53 +0900793 if (qc->err_mask ||
794 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
Tejun Heo44877b42007-02-21 01:06:51 +0900795 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
Tejun Heod25614b2006-11-14 22:37:35 +0900796 &sb[1], &sb[2], &sb[3], verbose);
797 sb[1] &= 0x0f;
Jeff Garzikb0955182005-05-12 15:45:22 -0400798 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
Tejun Heod25614b2006-11-14 22:37:35 +0900800 block = ata_tf_read_block(&qc->result_tf, dev);
Jeff Garzik0274aa22005-06-22 13:50:56 -0400801
Tejun Heod25614b2006-11-14 22:37:35 +0900802 /* information sense data descriptor */
803 sb[7] = 12;
804 desc[0] = 0x00;
805 desc[1] = 10;
Jeff Garzika7dac442005-10-30 04:44:42 -0500806
Tejun Heod25614b2006-11-14 22:37:35 +0900807 desc[2] |= 0x80; /* valid */
808 desc[6] = block >> 40;
809 desc[7] = block >> 32;
810 desc[8] = block >> 24;
811 desc[9] = block >> 16;
812 desc[10] = block >> 8;
813 desc[11] = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814}
815
Brian Kinga6cce2a2006-03-17 17:04:15 -0600816static void ata_scsi_sdev_config(struct scsi_device *sdev)
817{
818 sdev->use_10_for_rw = 1;
819 sdev->use_10_for_ms = 1;
Tejun Heo31cc23b2007-09-23 13:14:12 +0900820
821 /* Schedule policy is determined by ->qc_defer() callback and
822 * it needs to see every deferred qc. Set dev_blocked to 1 to
823 * prevent SCSI midlayer from automatically deferring
824 * requests.
825 */
826 sdev->max_device_blocked = 1;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600827}
828
829static void ata_scsi_dev_config(struct scsi_device *sdev,
830 struct ata_device *dev)
831{
Tejun Heo914ed352006-11-01 18:39:55 +0900832 /* configure max sectors */
833 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
Brian Kinga6cce2a2006-03-17 17:04:15 -0600834
Tejun Heo914ed352006-11-01 18:39:55 +0900835 /* SATA DMA transfers must be multiples of 4 byte, so
Brian Kinga6cce2a2006-03-17 17:04:15 -0600836 * we need to pad ATAPI transfers using an extra sg.
837 * Decrement max hw segments accordingly.
838 */
839 if (dev->class == ATA_DEV_ATAPI) {
Jens Axboe165125e2007-07-24 09:28:11 +0200840 struct request_queue *q = sdev->request_queue;
Brian Kinga6cce2a2006-03-17 17:04:15 -0600841 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
842 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900843
Tejun Heod8cf5382008-01-15 08:46:59 +0900844 if (dev->class == ATA_DEV_ATA)
845 sdev->manage_start_stop = 1;
846
Jeff Garzikf26792d2007-10-29 17:18:39 -0400847 if (dev->flags & ATA_DFLAG_AN)
848 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
849
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900850 if (dev->flags & ATA_DFLAG_NCQ) {
851 int depth;
852
853 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
854 depth = min(ATA_MAX_QUEUE - 1, depth);
855 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
856 }
Brian Kinga6cce2a2006-03-17 17:04:15 -0600857}
858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859/**
860 * ata_scsi_slave_config - Set SCSI device attributes
861 * @sdev: SCSI device to examine
862 *
863 * This is called before we actually start reading
864 * and writing to the device, to configure certain
865 * SCSI mid-layer behaviors.
866 *
867 * LOCKING:
868 * Defined by SCSI layer. We don't really care.
869 */
870
871int ata_scsi_slave_config(struct scsi_device *sdev)
872{
Tejun Heo31534362006-05-31 18:27:36 +0900873 struct ata_port *ap = ata_shost_to_port(sdev->host);
874 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
875
Brian Kinga6cce2a2006-03-17 17:04:15 -0600876 ata_scsi_sdev_config(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
Tejun Heo31534362006-05-31 18:27:36 +0900878 if (dev)
Brian Kinga6cce2a2006-03-17 17:04:15 -0600879 ata_scsi_dev_config(sdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
881 return 0; /* scsi layer doesn't check return value, sigh */
882}
883
884/**
Tejun Heo83c47bc2006-05-31 18:28:07 +0900885 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
886 * @sdev: SCSI device to be destroyed
887 *
888 * @sdev is about to be destroyed for hot/warm unplugging. If
889 * this unplugging was initiated by libata as indicated by NULL
890 * dev->sdev, this function doesn't have to do anything.
891 * Otherwise, SCSI layer initiated warm-unplug is in progress.
892 * Clear dev->sdev, schedule the device for ATA detach and invoke
893 * EH.
894 *
895 * LOCKING:
896 * Defined by SCSI layer. We don't really care.
897 */
898void ata_scsi_slave_destroy(struct scsi_device *sdev)
899{
900 struct ata_port *ap = ata_shost_to_port(sdev->host);
901 unsigned long flags;
902 struct ata_device *dev;
903
904 if (!ap->ops->error_handler)
905 return;
906
Jeff Garzikba6a1302006-06-22 23:46:10 -0400907 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900908 dev = __ata_scsi_find_dev(ap, sdev);
909 if (dev && dev->sdev) {
910 /* SCSI device already in CANCEL state, no need to offline it */
911 dev->sdev = NULL;
912 dev->flags |= ATA_DFLAG_DETACH;
913 ata_port_schedule_eh(ap);
914 }
Jeff Garzikba6a1302006-06-22 23:46:10 -0400915 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900916}
917
918/**
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900919 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
920 * @sdev: SCSI device to configure queue depth for
921 * @queue_depth: new queue depth
922 *
923 * This is libata standard hostt->change_queue_depth callback.
924 * SCSI will call into this callback when user tries to set queue
925 * depth via sysfs.
926 *
927 * LOCKING:
928 * SCSI layer (we don't care)
929 *
930 * RETURNS:
931 * Newly configured queue depth.
932 */
933int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
934{
935 struct ata_port *ap = ata_shost_to_port(sdev->host);
936 struct ata_device *dev;
Tejun Heo360f6542006-09-30 19:45:00 +0900937 unsigned long flags;
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900938
Tejun Heoc3c70c42007-02-20 23:31:22 +0900939 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900940 return sdev->queue_depth;
941
942 dev = ata_scsi_find_dev(ap, sdev);
943 if (!dev || !ata_dev_enabled(dev))
944 return sdev->queue_depth;
945
Tejun Heoc3c70c42007-02-20 23:31:22 +0900946 /* NCQ enabled? */
Tejun Heo360f6542006-09-30 19:45:00 +0900947 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc3c70c42007-02-20 23:31:22 +0900948 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
949 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
Tejun Heo360f6542006-09-30 19:45:00 +0900950 dev->flags |= ATA_DFLAG_NCQ_OFF;
Tejun Heoc3c70c42007-02-20 23:31:22 +0900951 queue_depth = 1;
952 }
Tejun Heo360f6542006-09-30 19:45:00 +0900953 spin_unlock_irqrestore(ap->lock, flags);
954
Tejun Heoc3c70c42007-02-20 23:31:22 +0900955 /* limit and apply queue depth */
956 queue_depth = min(queue_depth, sdev->host->can_queue);
957 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
958 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
959
960 if (sdev->queue_depth == queue_depth)
961 return -EINVAL;
962
963 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900964 return queue_depth;
965}
966
Tejun Heod9aca222007-05-17 16:43:26 +0200967/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +0200968static void ata_delayed_done_timerfn(unsigned long arg)
969{
970 struct scsi_cmnd *scmd = (void *)arg;
971
972 scmd->scsi_done(scmd);
973}
974
Tejun Heod9aca222007-05-17 16:43:26 +0200975/* XXX: for spindown warning */
Tejun Heoda071b42007-05-14 17:26:18 +0200976static void ata_delayed_done(struct scsi_cmnd *scmd)
977{
978 static struct timer_list timer;
979
980 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
981 mod_timer(&timer, jiffies + 5 * HZ);
982}
983
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900984/**
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400985 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
986 * @qc: Storage for translated ATA taskfile
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400987 *
988 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
989 * (to start). Perhaps these commands should be preceded by
990 * CHECK POWER MODE to see what power mode the device is already in.
991 * [See SAT revision 5 at www.t10.org]
992 *
993 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400994 * spin_lock_irqsave(host lock)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -0400995 *
996 * RETURNS:
997 * Zero on success, non-zero on error.
998 */
Tejun Heoad706992006-12-17 10:45:57 +0900999static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001000{
Tejun Heo542b1442006-12-17 10:45:08 +09001001 struct scsi_cmnd *scmd = qc->scsicmd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001002 struct ata_taskfile *tf = &qc->tf;
Tejun Heoad706992006-12-17 10:45:57 +09001003 const u8 *cdb = scmd->cmnd;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001004
Tejun Heo2e5704f2006-12-17 10:46:33 +09001005 if (scmd->cmd_len < 5)
1006 goto invalid_fld;
1007
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001008 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1009 tf->protocol = ATA_PROT_NODATA;
Tejun Heo542b1442006-12-17 10:45:08 +09001010 if (cdb[1] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001011 ; /* ignore IMMED bit, violates sat-r05 */
1012 }
Tejun Heo542b1442006-12-17 10:45:08 +09001013 if (cdb[4] & 0x2)
Douglas Gilbertae006512005-10-09 09:09:35 -04001014 goto invalid_fld; /* LOEJ bit set not supported */
Tejun Heo542b1442006-12-17 10:45:08 +09001015 if (((cdb[4] >> 4) & 0xf) != 0)
Douglas Gilbertae006512005-10-09 09:09:35 -04001016 goto invalid_fld; /* power conditions not supported */
Tejun Heoe31e8532007-09-23 13:14:13 +09001017
1018 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
1019 /* the device lacks PM support, finish without doing anything */
1020 scmd->result = SAM_STAT_GOOD;
1021 return 1;
1022 }
1023
Tejun Heo542b1442006-12-17 10:45:08 +09001024 if (cdb[4] & 0x1) {
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001025 tf->nsect = 1; /* 1 sector, lba=0 */
Albert Lee9d5b1302005-10-04 08:48:17 -04001026
1027 if (qc->dev->flags & ATA_DFLAG_LBA) {
Tejun Heoc44078c2006-05-15 20:57:21 +09001028 tf->flags |= ATA_TFLAG_LBA;
Albert Lee9d5b1302005-10-04 08:48:17 -04001029
1030 tf->lbah = 0x0;
1031 tf->lbam = 0x0;
1032 tf->lbal = 0x0;
1033 tf->device |= ATA_LBA;
1034 } else {
1035 /* CHS */
1036 tf->lbal = 0x1; /* sect */
1037 tf->lbam = 0x0; /* cyl low */
1038 tf->lbah = 0x0; /* cyl high */
1039 }
1040
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001041 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
Tejun Heo920a4b12007-05-04 21:28:48 +02001042 } else {
1043 /* XXX: This is for backward compatibility, will be
1044 * removed. Read Documentation/feature-removal-schedule.txt
1045 * for more info.
1046 */
Tejun Heod9aca222007-05-17 16:43:26 +02001047 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
Tejun Heo920a4b12007-05-04 21:28:48 +02001048 (system_state == SYSTEM_HALT ||
1049 system_state == SYSTEM_POWER_OFF)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001050 static unsigned long warned;
Tejun Heo920a4b12007-05-04 21:28:48 +02001051
Tejun Heoda071b42007-05-14 17:26:18 +02001052 if (!test_and_set_bit(0, &warned)) {
Tejun Heo920a4b12007-05-04 21:28:48 +02001053 ata_dev_printk(qc->dev, KERN_WARNING,
1054 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1055 "UPDATE SHUTDOWN UTILITY\n");
1056 ata_dev_printk(qc->dev, KERN_WARNING,
1057 "For more info, visit "
1058 "http://linux-ata.org/shutdown.html\n");
Tejun Heoda071b42007-05-14 17:26:18 +02001059
1060 /* ->scsi_done is not used, use it for
1061 * delayed completion.
1062 */
1063 scmd->scsi_done = qc->scsidone;
1064 qc->scsidone = ata_delayed_done;
Tejun Heo920a4b12007-05-04 21:28:48 +02001065 }
1066 scmd->result = SAM_STAT_GOOD;
1067 return 1;
1068 }
1069
Robert Hancock78981a72007-01-30 00:59:18 -08001070 /* Issue ATA STANDBY IMMEDIATE command */
1071 tf->command = ATA_CMD_STANDBYNOW1;
Tejun Heo920a4b12007-05-04 21:28:48 +02001072 }
Robert Hancock78981a72007-01-30 00:59:18 -08001073
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001074 /*
1075 * Standby and Idle condition timers could be implemented but that
1076 * would require libata to implement the Power condition mode page
1077 * and allow the user to change it. Changing mode pages requires
1078 * MODE SELECT to be implemented.
1079 */
1080
1081 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001082
1083invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001084 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001085 /* "Invalid field in cbd" */
1086 return 1;
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04001087}
1088
1089
1090/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1092 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 *
1094 * Sets up an ATA taskfile to issue FLUSH CACHE or
1095 * FLUSH CACHE EXT.
1096 *
1097 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001098 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 *
1100 * RETURNS:
1101 * Zero on success, non-zero on error.
1102 */
Tejun Heoad706992006-12-17 10:45:57 +09001103static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104{
1105 struct ata_taskfile *tf = &qc->tf;
1106
1107 tf->flags |= ATA_TFLAG_DEVICE;
1108 tf->protocol = ATA_PROT_NODATA;
1109
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001110 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 tf->command = ATA_CMD_FLUSH_EXT;
1112 else
1113 tf->command = ATA_CMD_FLUSH;
1114
Tejun Heob666da32007-10-26 15:53:59 +09001115 /* flush is critical for IO integrity, consider it an IO command */
1116 qc->flags |= ATA_QCFLAG_IO;
1117
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 return 0;
1119}
1120
1121/**
Albert Lee3aef5232005-10-04 08:47:43 -04001122 * scsi_6_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001123 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001124 *
1125 * Calculate LBA and transfer length for 6-byte commands.
1126 *
1127 * RETURNS:
1128 * @plba: the LBA
1129 * @plen: the transfer length
1130 */
Tejun Heo542b1442006-12-17 10:45:08 +09001131static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001132{
1133 u64 lba = 0;
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001134 u32 len;
Albert Lee3aef5232005-10-04 08:47:43 -04001135
1136 VPRINTK("six-byte command\n");
1137
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001138 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
Tejun Heo542b1442006-12-17 10:45:08 +09001139 lba |= ((u64)cdb[2]) << 8;
1140 lba |= ((u64)cdb[3]);
Albert Lee3aef5232005-10-04 08:47:43 -04001141
Jeff Garzik6c7b7d22007-05-25 04:39:39 -04001142 len = cdb[4];
Albert Lee3aef5232005-10-04 08:47:43 -04001143
1144 *plba = lba;
1145 *plen = len;
1146}
1147
1148/**
1149 * scsi_10_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001150 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001151 *
1152 * Calculate LBA and transfer length for 10-byte commands.
1153 *
1154 * RETURNS:
1155 * @plba: the LBA
1156 * @plen: the transfer length
1157 */
Tejun Heo542b1442006-12-17 10:45:08 +09001158static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001159{
1160 u64 lba = 0;
1161 u32 len = 0;
1162
1163 VPRINTK("ten-byte command\n");
1164
Tejun Heo542b1442006-12-17 10:45:08 +09001165 lba |= ((u64)cdb[2]) << 24;
1166 lba |= ((u64)cdb[3]) << 16;
1167 lba |= ((u64)cdb[4]) << 8;
1168 lba |= ((u64)cdb[5]);
Albert Lee3aef5232005-10-04 08:47:43 -04001169
Tejun Heo542b1442006-12-17 10:45:08 +09001170 len |= ((u32)cdb[7]) << 8;
1171 len |= ((u32)cdb[8]);
Albert Lee3aef5232005-10-04 08:47:43 -04001172
1173 *plba = lba;
1174 *plen = len;
1175}
1176
1177/**
1178 * scsi_16_lba_len - Get LBA and transfer length
Tejun Heo542b1442006-12-17 10:45:08 +09001179 * @cdb: SCSI command to translate
Albert Lee3aef5232005-10-04 08:47:43 -04001180 *
1181 * Calculate LBA and transfer length for 16-byte commands.
1182 *
1183 * RETURNS:
1184 * @plba: the LBA
1185 * @plen: the transfer length
1186 */
Tejun Heo542b1442006-12-17 10:45:08 +09001187static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
Albert Lee3aef5232005-10-04 08:47:43 -04001188{
1189 u64 lba = 0;
1190 u32 len = 0;
1191
1192 VPRINTK("sixteen-byte command\n");
1193
Tejun Heo542b1442006-12-17 10:45:08 +09001194 lba |= ((u64)cdb[2]) << 56;
1195 lba |= ((u64)cdb[3]) << 48;
1196 lba |= ((u64)cdb[4]) << 40;
1197 lba |= ((u64)cdb[5]) << 32;
1198 lba |= ((u64)cdb[6]) << 24;
1199 lba |= ((u64)cdb[7]) << 16;
1200 lba |= ((u64)cdb[8]) << 8;
1201 lba |= ((u64)cdb[9]);
Albert Lee3aef5232005-10-04 08:47:43 -04001202
Tejun Heo542b1442006-12-17 10:45:08 +09001203 len |= ((u32)cdb[10]) << 24;
1204 len |= ((u32)cdb[11]) << 16;
1205 len |= ((u32)cdb[12]) << 8;
1206 len |= ((u32)cdb[13]);
Albert Lee3aef5232005-10-04 08:47:43 -04001207
1208 *plba = lba;
1209 *plen = len;
1210}
1211
1212/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1214 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 *
1216 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1217 *
1218 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001219 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 *
1221 * RETURNS:
1222 * Zero on success, non-zero on error.
1223 */
Tejun Heoad706992006-12-17 10:45:57 +09001224static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225{
Tejun Heo542b1442006-12-17 10:45:08 +09001226 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 struct ata_taskfile *tf = &qc->tf;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001228 struct ata_device *dev = qc->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 u64 dev_sectors = qc->dev->n_sectors;
Tejun Heoad706992006-12-17 10:45:57 +09001230 const u8 *cdb = scmd->cmnd;
Albert Lee3aef5232005-10-04 08:47:43 -04001231 u64 block;
1232 u32 n_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
1234 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1235 tf->protocol = ATA_PROT_NODATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
Tejun Heo2e5704f2006-12-17 10:46:33 +09001237 if (cdb[0] == VERIFY) {
1238 if (scmd->cmd_len < 10)
1239 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001240 scsi_10_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001241 } else if (cdb[0] == VERIFY_16) {
1242 if (scmd->cmd_len < 16)
1243 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001244 scsi_16_lba_len(cdb, &block, &n_block);
Tejun Heo2e5704f2006-12-17 10:46:33 +09001245 } else
Douglas Gilbertae006512005-10-09 09:09:35 -04001246 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Albert Lee8bf62ec2005-05-12 15:29:42 -04001248 if (!n_block)
Douglas Gilbertae006512005-10-09 09:09:35 -04001249 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001250 if (block >= dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001251 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001252 if ((block + n_block) > dev_sectors)
Douglas Gilbertae006512005-10-09 09:09:35 -04001253 goto out_of_range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Albert Lee07506692005-10-12 15:04:18 +08001255 if (dev->flags & ATA_DFLAG_LBA) {
1256 tf->flags |= ATA_TFLAG_LBA;
1257
Albert Leec6a33e22005-10-12 15:12:26 +08001258 if (lba_28_ok(block, n_block)) {
1259 /* use LBA28 */
1260 tf->command = ATA_CMD_VERIFY;
1261 tf->device |= (block >> 24) & 0xf;
1262 } else if (lba_48_ok(block, n_block)) {
1263 if (!(dev->flags & ATA_DFLAG_LBA48))
1264 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001265
1266 /* use LBA48 */
1267 tf->flags |= ATA_TFLAG_LBA48;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001268 tf->command = ATA_CMD_VERIFY_EXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
Albert Lee8bf62ec2005-05-12 15:29:42 -04001270 tf->hob_nsect = (n_block >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
Albert Lee8bf62ec2005-05-12 15:29:42 -04001272 tf->hob_lbah = (block >> 40) & 0xff;
1273 tf->hob_lbam = (block >> 32) & 0xff;
1274 tf->hob_lbal = (block >> 24) & 0xff;
Albert Leec6a33e22005-10-12 15:12:26 +08001275 } else
1276 /* request too large even for LBA48 */
1277 goto out_of_range;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001278
1279 tf->nsect = n_block & 0xff;
1280
1281 tf->lbah = (block >> 16) & 0xff;
1282 tf->lbam = (block >> 8) & 0xff;
1283 tf->lbal = block & 0xff;
1284
1285 tf->device |= ATA_LBA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001287 /* CHS */
1288 u32 sect, head, cyl, track;
1289
Albert Leec6a33e22005-10-12 15:12:26 +08001290 if (!lba_28_ok(block, n_block))
1291 goto out_of_range;
Albert Lee07506692005-10-12 15:04:18 +08001292
Albert Lee8bf62ec2005-05-12 15:29:42 -04001293 /* Convert LBA to CHS */
1294 track = (u32)block / dev->sectors;
1295 cyl = track / dev->heads;
1296 head = track % dev->heads;
1297 sect = (u32)block % dev->sectors + 1;
1298
Albert Leec187c4b2005-10-04 08:46:51 -04001299 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1300 (u32)block, track, cyl, head, sect);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001301
1302 /* Check whether the converted CHS can fit.
1303 Cylinder: 0-65535
Albert Lee8bf62ec2005-05-12 15:29:42 -04001304 Head: 0-15
1305 Sector: 1-255*/
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001306 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
Douglas Gilbertae006512005-10-09 09:09:35 -04001307 goto out_of_range;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001308
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 tf->command = ATA_CMD_VERIFY;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001310 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1311 tf->lbal = sect;
1312 tf->lbam = cyl;
1313 tf->lbah = cyl >> 8;
1314 tf->device |= head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 }
1316
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001318
1319invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001320 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001321 /* "Invalid field in cbd" */
1322 return 1;
1323
1324out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001325 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001326 /* "Logical Block Address out of range" */
1327 return 1;
1328
1329nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001330 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001331 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332}
1333
1334/**
1335 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1336 * @qc: Storage for translated ATA taskfile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 *
1338 * Converts any of six SCSI read/write commands into the
1339 * ATA counterpart, including starting sector (LBA),
1340 * sector count, and taking into account the device's LBA48
1341 * support.
1342 *
1343 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1344 * %WRITE_16 are currently supported.
1345 *
1346 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001347 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 *
1349 * RETURNS:
1350 * Zero on success, non-zero on error.
1351 */
Tejun Heoad706992006-12-17 10:45:57 +09001352static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353{
Tejun Heo542b1442006-12-17 10:45:08 +09001354 struct scsi_cmnd *scmd = qc->scsicmd;
Tejun Heoad706992006-12-17 10:45:57 +09001355 const u8 *cdb = scmd->cmnd;
Tejun Heobd056d72006-11-14 22:47:10 +09001356 unsigned int tf_flags = 0;
Albert Lee3aef5232005-10-04 08:47:43 -04001357 u64 block;
1358 u32 n_block;
Tejun Heobd056d72006-11-14 22:47:10 +09001359 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Tejun Heo542b1442006-12-17 10:45:08 +09001361 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
Tejun Heobd056d72006-11-14 22:47:10 +09001362 tf_flags |= ATA_TFLAG_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363
Tejun Heo9a3dccc2006-01-06 09:56:18 +01001364 /* Calculate the SCSI LBA, transfer length and FUA. */
Tejun Heo542b1442006-12-17 10:45:08 +09001365 switch (cdb[0]) {
Albert Lee3aef5232005-10-04 08:47:43 -04001366 case READ_10:
1367 case WRITE_10:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001368 if (unlikely(scmd->cmd_len < 10))
1369 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001370 scsi_10_lba_len(cdb, &block, &n_block);
1371 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001372 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001373 break;
1374 case READ_6:
1375 case WRITE_6:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001376 if (unlikely(scmd->cmd_len < 6))
1377 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001378 scsi_6_lba_len(cdb, &block, &n_block);
Albert Leec187c4b2005-10-04 08:46:51 -04001379
1380 /* for 6-byte r/w commands, transfer length 0
1381 * means 256 blocks of data, not 0 block.
1382 */
Jeff Garzik76b2bf92005-08-29 19:24:43 -04001383 if (!n_block)
1384 n_block = 256;
Albert Lee3aef5232005-10-04 08:47:43 -04001385 break;
1386 case READ_16:
1387 case WRITE_16:
Tejun Heo2e5704f2006-12-17 10:46:33 +09001388 if (unlikely(scmd->cmd_len < 16))
1389 goto invalid_fld;
Tejun Heo542b1442006-12-17 10:45:08 +09001390 scsi_16_lba_len(cdb, &block, &n_block);
1391 if (unlikely(cdb[1] & (1 << 3)))
Tejun Heobd056d72006-11-14 22:47:10 +09001392 tf_flags |= ATA_TFLAG_FUA;
Albert Lee3aef5232005-10-04 08:47:43 -04001393 break;
1394 default:
Albert Lee8bf62ec2005-05-12 15:29:42 -04001395 DPRINTK("no-byte command\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001396 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 }
1398
Albert Lee8bf62ec2005-05-12 15:29:42 -04001399 /* Check and compose ATA command */
1400 if (!n_block)
Albert Leec187c4b2005-10-04 08:46:51 -04001401 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1402 * length 0 means transfer 0 block of data.
1403 * However, for ATA R/W commands, sector count 0 means
1404 * 256 or 65536 sectors, not 0 sectors as in SCSI.
Alan Coxf51750d2005-11-07 17:06:33 +00001405 *
1406 * WARNING: one or two older ATA drives treat 0 as 0...
Albert Leec187c4b2005-10-04 08:46:51 -04001407 */
Douglas Gilbertae006512005-10-09 09:09:35 -04001408 goto nothing_to_do;
Albert Lee8bf62ec2005-05-12 15:29:42 -04001409
Tejun Heobd056d72006-11-14 22:47:10 +09001410 qc->flags |= ATA_QCFLAG_IO;
Tejun Heo726f0782007-01-03 17:30:39 +09001411 qc->nbytes = n_block * ATA_SECT_SIZE;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001412
Tejun Heobd056d72006-11-14 22:47:10 +09001413 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1414 qc->tag);
1415 if (likely(rc == 0))
1416 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001417
Tejun Heobd056d72006-11-14 22:47:10 +09001418 if (rc == -ERANGE)
1419 goto out_of_range;
1420 /* treat all other errors as -EINVAL, fall through */
Douglas Gilbertae006512005-10-09 09:09:35 -04001421invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09001422 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001423 /* "Invalid field in cbd" */
1424 return 1;
1425
1426out_of_range:
Tejun Heo542b1442006-12-17 10:45:08 +09001427 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
Douglas Gilbertae006512005-10-09 09:09:35 -04001428 /* "Logical Block Address out of range" */
1429 return 1;
1430
1431nothing_to_do:
Tejun Heo542b1442006-12-17 10:45:08 +09001432 scmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001433 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434}
1435
Tejun Heo77853bf2006-01-23 13:09:36 +09001436static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437{
Tejun Heoc31f5712006-11-22 12:39:43 +09001438 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika7dac442005-10-30 04:44:42 -05001440 u8 *cdb = cmd->cmnd;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001441 int need_sense = (qc->err_mask != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442
Jeff Garzikb0955182005-05-12 15:45:22 -04001443 /* For ATA pass thru (SAT) commands, generate a sense block if
1444 * user mandated it or if there's an error. Note that if we
1445 * generate because the user forced us to, a check condition
1446 * is generated and the ATA register values are returned
1447 * whether the command completed successfully or not. If there
1448 * was no error, SK, ASC and ASCQ will all be zero.
1449 */
Jeff Garzika7dac442005-10-30 04:44:42 -05001450 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001451 ((cdb[2] & 0x20) || need_sense)) {
Tejun Heo750426a2006-11-14 22:37:35 +09001452 ata_gen_passthru_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001453 } else {
1454 if (!need_sense) {
1455 cmd->result = SAM_STAT_GOOD;
1456 } else {
1457 /* TODO: decide which descriptor format to use
1458 * for 48b LBA devices and call that here
1459 * instead of the fixed desc, which is only
1460 * good for smaller LBA (and maybe CHS?)
1461 * devices.
1462 */
Tejun Heo750426a2006-11-14 22:37:35 +09001463 ata_gen_ata_sense(qc);
Jeff Garzikb0955182005-05-12 15:45:22 -04001464 }
1465 }
1466
Tejun Heod9aca222007-05-17 16:43:26 +02001467 /* XXX: track spindown state for spindown skipping and warning */
Tejun Heo13b8d092007-05-15 12:29:22 +02001468 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1469 qc->tf.command == ATA_CMD_STANDBYNOW1))
1470 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1471 else if (likely(system_state != SYSTEM_HALT &&
1472 system_state != SYSTEM_POWER_OFF))
1473 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1474
Tejun Heoc31f5712006-11-22 12:39:43 +09001475 if (need_sense && !ap->ops->error_handler)
Tejun Heo44877b42007-02-21 01:06:51 +09001476 ata_dump_status(ap->print_id, &qc->result_tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
1478 qc->scsidone(cmd);
1479
Tejun Heo77853bf2006-01-23 13:09:36 +09001480 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481}
1482
1483/**
1484 * ata_scsi_translate - Translate then issue SCSI command to ATA device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 * @dev: ATA device to which the command is addressed
1486 * @cmd: SCSI command to execute
1487 * @done: SCSI command completion function
1488 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1489 *
1490 * Our ->queuecommand() function has decided that the SCSI
1491 * command issued can be directly translated into an ATA
1492 * command, rather than handled internally.
1493 *
1494 * This function sets up an ata_queued_cmd structure for the
1495 * SCSI command, and sends that ata_queued_cmd to the hardware.
1496 *
Douglas Gilbertae006512005-10-09 09:09:35 -04001497 * The xlat_func argument (actor) returns 0 if ready to execute
1498 * ATA command, else 1 to finish translation. If 1 is returned
1499 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1500 * to be set reflecting an error condition or clean (early)
1501 * termination.
1502 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001504 * spin_lock_irqsave(host lock)
Tejun Heo2115ea92006-05-15 21:03:39 +09001505 *
1506 * RETURNS:
1507 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1508 * needs to be deferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 */
Tejun Heo2115ea92006-05-15 21:03:39 +09001510static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1511 void (*done)(struct scsi_cmnd *),
1512 ata_xlat_func_t xlat_func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513{
Tejun Heo31cc23b2007-09-23 13:14:12 +09001514 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 struct ata_queued_cmd *qc;
Tejun Heo31cc23b2007-09-23 13:14:12 +09001516 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
1518 VPRINTK("ENTER\n");
1519
Tejun Heo3373efd2006-05-15 20:57:53 +09001520 qc = ata_scsi_qc_new(dev, cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 if (!qc)
Douglas Gilbertae006512005-10-09 09:09:35 -04001522 goto err_mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
1524 /* data is present; dma-map it */
be7db052005-04-17 15:26:13 -05001525 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1526 cmd->sc_data_direction == DMA_TO_DEVICE) {
Boaz Harrosh71201652007-09-18 17:48:50 +02001527 if (unlikely(scsi_bufflen(cmd) < 1)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09001528 ata_dev_printk(dev, KERN_WARNING,
1529 "WARNING: zero len r/w req\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04001530 goto err_did;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
1532
Boaz Harrosh71201652007-09-18 17:48:50 +02001533 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534
1535 qc->dma_dir = cmd->sc_data_direction;
1536 }
1537
1538 qc->complete_fn = ata_scsi_qc_complete;
1539
Tejun Heoad706992006-12-17 10:45:57 +09001540 if (xlat_func(qc))
Douglas Gilbertae006512005-10-09 09:09:35 -04001541 goto early_finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542
Tejun Heo31cc23b2007-09-23 13:14:12 +09001543 if (ap->ops->qc_defer) {
1544 if ((rc = ap->ops->qc_defer(qc)))
1545 goto defer;
1546 }
1547
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 /* select device, send command to hardware */
Tejun Heo8e0e6942006-03-31 20:41:11 +09001549 ata_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550
1551 VPRINTK("EXIT\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001552 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553
Douglas Gilbertae006512005-10-09 09:09:35 -04001554early_finish:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001555 ata_qc_free(qc);
Tejun Heoda071b42007-05-14 17:26:18 +02001556 qc->scsidone(cmd);
Douglas Gilbertae006512005-10-09 09:09:35 -04001557 DPRINTK("EXIT - early finish (good or error)\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001558 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04001559
1560err_did:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 ata_qc_free(qc);
Douglas Gilbertae006512005-10-09 09:09:35 -04001562 cmd->result = (DID_ERROR << 16);
Tejun Heoda071b42007-05-14 17:26:18 +02001563 qc->scsidone(cmd);
Darrick J. Wong253b92e2006-11-14 09:55:41 -05001564err_mem:
Douglas Gilbertae006512005-10-09 09:09:35 -04001565 DPRINTK("EXIT - internal\n");
Tejun Heo2115ea92006-05-15 21:03:39 +09001566 return 0;
Tejun Heo3dc1d882006-05-15 21:03:45 +09001567
1568defer:
Tejun Heo31cc23b2007-09-23 13:14:12 +09001569 ata_qc_free(qc);
Tejun Heo3dc1d882006-05-15 21:03:45 +09001570 DPRINTK("EXIT - defer\n");
Tejun Heo31cc23b2007-09-23 13:14:12 +09001571 if (rc == ATA_DEFER_LINK)
1572 return SCSI_MLQUEUE_DEVICE_BUSY;
1573 else
1574 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575}
1576
1577/**
1578 * ata_scsi_rbuf_get - Map response buffer.
1579 * @cmd: SCSI command containing buffer to be mapped.
1580 * @buf_out: Pointer to mapped area.
1581 *
1582 * Maps buffer contained within SCSI command @cmd.
1583 *
1584 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001585 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 *
1587 * RETURNS:
1588 * Length of response buffer.
1589 */
1590
1591static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1592{
1593 u8 *buf;
1594 unsigned int buflen;
1595
Boaz Harrosh71201652007-09-18 17:48:50 +02001596 struct scatterlist *sg = scsi_sglist(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
Boaz Harroshe10b8c32007-09-18 17:46:12 +02001598 if (sg) {
Jens Axboe45711f12007-10-22 21:19:53 +02001599 buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 buflen = sg->length;
1601 } else {
Boaz Harroshe10b8c32007-09-18 17:46:12 +02001602 buf = NULL;
1603 buflen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 }
1605
1606 *buf_out = buf;
1607 return buflen;
1608}
1609
1610/**
1611 * ata_scsi_rbuf_put - Unmap response buffer.
1612 * @cmd: SCSI command containing buffer to be unmapped.
1613 * @buf: buffer to unmap
1614 *
1615 * Unmaps response buffer contained within @cmd.
1616 *
1617 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001618 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 */
1620
1621static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1622{
Boaz Harrosh71201652007-09-18 17:48:50 +02001623 struct scatterlist *sg = scsi_sglist(cmd);
Boaz Harroshe10b8c32007-09-18 17:46:12 +02001624 if (sg)
Jeff Garzikda02d2a2006-12-11 11:05:53 -05001625 kunmap_atomic(buf - sg->offset, KM_IRQ0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626}
1627
1628/**
1629 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1630 * @args: device IDENTIFY data / SCSI command of interest.
1631 * @actor: Callback hook for desired SCSI command simulator
1632 *
1633 * Takes care of the hard work of simulating a SCSI command...
1634 * Mapping the response buffer, calling the command's handler,
1635 * and handling the handler's return value. This return value
1636 * indicates whether the handler wishes the SCSI command to be
Douglas Gilbertae006512005-10-09 09:09:35 -04001637 * completed successfully (0), or not (in which case cmd->result
1638 * and sense buffer are assumed to be set).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 *
1640 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001641 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 */
1643
1644void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001645 unsigned int (*actor) (struct ata_scsi_args *args,
1646 u8 *rbuf, unsigned int buflen))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647{
1648 u8 *rbuf;
1649 unsigned int buflen, rc;
1650 struct scsi_cmnd *cmd = args->cmd;
1651
1652 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1653 memset(rbuf, 0, buflen);
1654 rc = actor(args, rbuf, buflen);
1655 ata_scsi_rbuf_put(cmd, rbuf);
1656
Douglas Gilbertae006512005-10-09 09:09:35 -04001657 if (rc == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658 cmd->result = SAM_STAT_GOOD;
Douglas Gilbertae006512005-10-09 09:09:35 -04001659 args->done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660}
1661
1662/**
Tejun Heo6a362612006-11-20 11:15:47 +09001663 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1664 * @idx: byte index into SCSI response buffer
1665 * @val: value to set
1666 *
1667 * To be used by SCSI command simulator functions. This macros
1668 * expects two local variables, u8 *rbuf and unsigned int buflen,
1669 * are in scope.
1670 *
1671 * LOCKING:
1672 * None.
1673 */
1674#define ATA_SCSI_RBUF_SET(idx, val) do { \
1675 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1676 } while (0)
1677
1678/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 * ata_scsiop_inq_std - Simulate INQUIRY command
1680 * @args: device IDENTIFY data / SCSI command of interest.
1681 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1682 * @buflen: Response buffer length.
1683 *
1684 * Returns standard device identification data associated
Jeff Garzikb142eb62006-03-21 20:37:47 -05001685 * with non-VPD INQUIRY command output.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 *
1687 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001688 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 */
1690
1691unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1692 unsigned int buflen)
1693{
1694 u8 hdr[] = {
1695 TYPE_DISK,
1696 0,
1697 0x5, /* claim SPC-3 version compatibility */
1698 2,
1699 95 - 4
1700 };
1701
1702 /* set scsi removeable (RMB) bit per ata bit */
1703 if (ata_id_removeable(args->id))
1704 hdr[1] |= (1 << 7);
1705
1706 VPRINTK("ENTER\n");
1707
1708 memcpy(rbuf, hdr, sizeof(hdr));
1709
1710 if (buflen > 35) {
1711 memcpy(&rbuf[8], "ATA ", 8);
Tejun Heoa0cf7332007-01-02 20:18:49 +09001712 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1713 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 if (rbuf[32] == 0 || rbuf[32] == ' ')
1715 memcpy(&rbuf[32], "n/a ", 4);
1716 }
1717
1718 if (buflen > 63) {
1719 const u8 versions[] = {
1720 0x60, /* SAM-3 (no version claimed) */
1721
1722 0x03,
1723 0x20, /* SBC-2 (no version claimed) */
1724
1725 0x02,
1726 0x60 /* SPC-3 (no version claimed) */
1727 };
1728
1729 memcpy(rbuf + 59, versions, sizeof(versions));
1730 }
1731
1732 return 0;
1733}
1734
1735/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001736 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 * @args: device IDENTIFY data / SCSI command of interest.
1738 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1739 * @buflen: Response buffer length.
1740 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001741 * Returns list of inquiry VPD pages available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 *
1743 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001744 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 */
1746
1747unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1748 unsigned int buflen)
1749{
1750 const u8 pages[] = {
1751 0x00, /* page 0x00, this page */
1752 0x80, /* page 0x80, unit serial no page */
1753 0x83 /* page 0x83, device ident page */
1754 };
Jeff Garzikb142eb62006-03-21 20:37:47 -05001755 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756
1757 if (buflen > 6)
1758 memcpy(rbuf + 4, pages, sizeof(pages));
1759
1760 return 0;
1761}
1762
1763/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001764 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 * @args: device IDENTIFY data / SCSI command of interest.
1766 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1767 * @buflen: Response buffer length.
1768 *
1769 * Returns ATA device serial number.
1770 *
1771 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001772 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 */
1774
1775unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1776 unsigned int buflen)
1777{
1778 const u8 hdr[] = {
1779 0,
1780 0x80, /* this page code */
1781 0,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001782 ATA_ID_SERNO_LEN, /* page len */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 };
1784 memcpy(rbuf, hdr, sizeof(hdr));
1785
Tejun Heoa0cf7332007-01-02 20:18:49 +09001786 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
Tejun Heo6a62a042006-02-13 10:02:46 +09001787 ata_id_string(args->id, (unsigned char *) &rbuf[4],
Tejun Heoa0cf7332007-01-02 20:18:49 +09001788 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789
1790 return 0;
1791}
1792
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793/**
Jeff Garzikb142eb62006-03-21 20:37:47 -05001794 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795 * @args: device IDENTIFY data / SCSI command of interest.
1796 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1797 * @buflen: Response buffer length.
1798 *
Jeff Garzikb142eb62006-03-21 20:37:47 -05001799 * Yields two logical unit device identification designators:
1800 * - vendor specific ASCII containing the ATA serial number
1801 * - SAT defined "t10 vendor id based" containing ASCII vendor
1802 * name ("ATA "), model and serial numbers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 *
1804 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001805 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 */
1807
1808unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1809 unsigned int buflen)
1810{
Jeff Garzikb142eb62006-03-21 20:37:47 -05001811 int num;
1812 const int sat_model_serial_desc_len = 68;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001813
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 rbuf[1] = 0x83; /* this page code */
Jeff Garzikb142eb62006-03-21 20:37:47 -05001815 num = 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
Tejun Heoa0cf7332007-01-02 20:18:49 +09001817 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
Jeff Garzikb142eb62006-03-21 20:37:47 -05001818 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001819 rbuf[num + 0] = 2;
Tejun Heoa0cf7332007-01-02 20:18:49 +09001820 rbuf[num + 3] = ATA_ID_SERNO_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001821 num += 4;
1822 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001823 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1824 num += ATA_ID_SERNO_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 }
Jeff Garzikb142eb62006-03-21 20:37:47 -05001826 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1827 /* SAT defined lu model and serial numbers descriptor */
1828 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001829 rbuf[num + 0] = 2;
1830 rbuf[num + 1] = 1;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001831 rbuf[num + 3] = sat_model_serial_desc_len;
1832 num += 4;
1833 memcpy(rbuf + num, "ATA ", 8);
1834 num += 8;
1835 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001836 ATA_ID_PROD, ATA_ID_PROD_LEN);
1837 num += ATA_ID_PROD_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001838 ata_id_string(args->id, (unsigned char *) rbuf + num,
Tejun Heoa0cf7332007-01-02 20:18:49 +09001839 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1840 num += ATA_ID_SERNO_LEN;
Jeff Garzikb142eb62006-03-21 20:37:47 -05001841 }
1842 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 return 0;
1844}
1845
1846/**
Jeff Garzikad355b42007-09-21 20:38:03 -04001847 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1848 * @args: device IDENTIFY data / SCSI command of interest.
1849 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1850 * @buflen: Response buffer length.
1851 *
1852 * Yields SAT-specified ATA VPD page.
1853 *
1854 * LOCKING:
1855 * spin_lock_irqsave(host lock)
1856 */
1857
1858unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1859 unsigned int buflen)
1860{
1861 u8 pbuf[60];
1862 struct ata_taskfile tf;
1863 unsigned int i;
1864
1865 if (!buflen)
1866 return 0;
1867
1868 memset(&pbuf, 0, sizeof(pbuf));
1869 memset(&tf, 0, sizeof(tf));
1870
1871 pbuf[1] = 0x89; /* our page code */
1872 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1873 pbuf[3] = (0x238 & 0xff);
1874
Jeff Garzikc78968b2007-09-21 21:03:28 -04001875 memcpy(&pbuf[8], "linux ", 8);
1876 memcpy(&pbuf[16], "libata ", 16);
1877 memcpy(&pbuf[32], DRV_VERSION, 4);
Jeff Garzikad355b42007-09-21 20:38:03 -04001878 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1879
1880 /* we don't store the ATA device signature, so we fake it */
1881
1882 tf.command = ATA_DRDY; /* really, this is Status reg */
1883 tf.lbal = 0x1;
1884 tf.nsect = 0x1;
1885
1886 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1887 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1888
1889 pbuf[56] = ATA_CMD_ID_ATA;
1890
1891 i = min(buflen, 60U);
1892 memcpy(rbuf, &pbuf[0], i);
1893 buflen -= i;
1894
1895 if (!buflen)
1896 return 0;
1897
1898 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1899 return 0;
1900}
1901
1902/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001903 * ata_scsiop_noop - Command handler that simply returns success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1906 * @buflen: Response buffer length.
1907 *
1908 * No operation. Simply returns success to caller, to indicate
1909 * that the caller should successfully complete this SCSI command.
1910 *
1911 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04001912 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 */
1914
1915unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1916 unsigned int buflen)
1917{
1918 VPRINTK("ENTER\n");
1919 return 0;
1920}
1921
1922/**
1923 * ata_msense_push - Push data onto MODE SENSE data output buffer
1924 * @ptr_io: (input/output) Location to store more output data
1925 * @last: End of output data buffer
1926 * @buf: Pointer to BLOB being added to output buffer
1927 * @buflen: Length of BLOB
1928 *
1929 * Store MODE SENSE data on an output buffer.
1930 *
1931 * LOCKING:
1932 * None.
1933 */
1934
1935static void ata_msense_push(u8 **ptr_io, const u8 *last,
1936 const u8 *buf, unsigned int buflen)
1937{
1938 u8 *ptr = *ptr_io;
1939
1940 if ((ptr + buflen - 1) > last)
1941 return;
1942
1943 memcpy(ptr, buf, buflen);
1944
1945 ptr += buflen;
1946
1947 *ptr_io = ptr;
1948}
1949
1950/**
1951 * ata_msense_caching - Simulate MODE SENSE caching info page
1952 * @id: device IDENTIFY data
1953 * @ptr_io: (input/output) Location to store more output data
1954 * @last: End of output data buffer
1955 *
1956 * Generate a caching info page, which conditionally indicates
1957 * write caching to the SCSI layer, depending on device
1958 * capabilities.
1959 *
1960 * LOCKING:
1961 * None.
1962 */
1963
1964static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1965 const u8 *last)
1966{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001967 u8 page[CACHE_MPAGE_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001969 memcpy(page, def_cache_mpage, sizeof(page));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 if (ata_id_wcache_enabled(id))
1971 page[2] |= (1 << 2); /* write cache enable */
1972 if (!ata_id_rahead_enabled(id))
1973 page[12] |= (1 << 5); /* disable read ahead */
1974
1975 ata_msense_push(ptr_io, last, page, sizeof(page));
1976 return sizeof(page);
1977}
1978
1979/**
1980 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1981 * @dev: Device associated with this MODE SENSE command
1982 * @ptr_io: (input/output) Location to store more output data
1983 * @last: End of output data buffer
1984 *
1985 * Generate a generic MODE SENSE control mode page.
1986 *
1987 * LOCKING:
1988 * None.
1989 */
1990
1991static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1992{
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04001993 ata_msense_push(ptr_io, last, def_control_mpage,
1994 sizeof(def_control_mpage));
1995 return sizeof(def_control_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996}
1997
1998/**
1999 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2000 * @dev: Device associated with this MODE SENSE command
2001 * @ptr_io: (input/output) Location to store more output data
2002 * @last: End of output data buffer
2003 *
2004 * Generate a generic MODE SENSE r/w error recovery page.
2005 *
2006 * LOCKING:
2007 * None.
2008 */
2009
2010static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
2011{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002013 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
2014 sizeof(def_rw_recovery_mpage));
2015 return sizeof(def_rw_recovery_mpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016}
2017
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002018/*
2019 * We can turn this into a real blacklist if it's needed, for now just
2020 * blacklist any Maxtor BANC1G10 revision firmware
2021 */
2022static int ata_dev_supports_fua(u16 *id)
2023{
Tejun Heoa0cf7332007-01-02 20:18:49 +09002024 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002025
Jeff Garzikc3c013a2006-02-27 22:31:19 -05002026 if (!libata_fua)
2027 return 0;
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002028 if (!ata_id_has_fua(id))
2029 return 0;
2030
Tejun Heoa0cf7332007-01-02 20:18:49 +09002031 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2032 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002033
Tejun Heo2e026712006-02-12 22:47:04 +09002034 if (strcmp(model, "Maxtor"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002035 return 1;
Tejun Heo2e026712006-02-12 22:47:04 +09002036 if (strcmp(fw, "BANC1G10"))
Jens Axboe48bdc8e2006-01-30 16:09:35 +01002037 return 1;
2038
2039 return 0; /* blacklisted */
2040}
2041
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042/**
2043 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2044 * @args: device IDENTIFY data / SCSI command of interest.
2045 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2046 * @buflen: Response buffer length.
2047 *
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002048 * Simulate MODE SENSE commands. Assume this is invoked for direct
2049 * access devices (e.g. disks) only. There should be no block
2050 * descriptor for other device types.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 *
2052 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002053 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 */
2055
2056unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2057 unsigned int buflen)
2058{
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002059 struct ata_device *dev = args->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 u8 *scsicmd = args->cmd->cmnd, *p, *last;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002061 const u8 sat_blk_desc[] = {
2062 0, 0, 0, 0, /* number of blocks: sat unspecified */
2063 0,
2064 0, 0x2, 0x0 /* block length: 512 bytes */
2065 };
2066 u8 pg, spg;
2067 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002068 u8 dpofua;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
2070 VPRINTK("ENTER\n");
2071
2072 six_byte = (scsicmd[0] == MODE_SENSE);
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002073 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2074 /*
2075 * LLBA bit in msense(10) ignored (compliant)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076 */
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002077
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 page_control = scsicmd[2] >> 6;
Douglas Gilbertae006512005-10-09 09:09:35 -04002079 switch (page_control) {
2080 case 0: /* current */
2081 break; /* supported */
2082 case 3: /* saved */
2083 goto saving_not_supp;
2084 case 1: /* changeable */
2085 case 2: /* defaults */
2086 default:
2087 goto invalid_fld;
2088 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002090 if (six_byte) {
2091 output_len = 4 + (ebd ? 8 : 0);
2092 alloc_len = scsicmd[4];
2093 } else {
2094 output_len = 8 + (ebd ? 8 : 0);
2095 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2096 }
2097 minlen = (alloc_len < buflen) ? alloc_len : buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098
2099 p = rbuf + output_len;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002100 last = rbuf + minlen - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002102 pg = scsicmd[2] & 0x3f;
2103 spg = scsicmd[3];
2104 /*
2105 * No mode subpages supported (yet) but asking for _all_
2106 * subpages may be valid
2107 */
2108 if (spg && (spg != ALL_SUB_MPAGES))
2109 goto invalid_fld;
2110
2111 switch(pg) {
2112 case RW_RECOVERY_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 output_len += ata_msense_rw_recovery(&p, last);
2114 break;
2115
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002116 case CACHE_MPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 output_len += ata_msense_caching(args->id, &p, last);
2118 break;
2119
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002120 case CONTROL_MPAGE: {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121 output_len += ata_msense_ctl_mode(&p, last);
2122 break;
2123 }
2124
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002125 case ALL_MPAGES:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 output_len += ata_msense_rw_recovery(&p, last);
2127 output_len += ata_msense_caching(args->id, &p, last);
2128 output_len += ata_msense_ctl_mode(&p, last);
2129 break;
2130
2131 default: /* invalid page code */
Douglas Gilbertae006512005-10-09 09:09:35 -04002132 goto invalid_fld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 }
2134
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002135 if (minlen < 1)
2136 return 0;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002137
2138 dpofua = 0;
Alan Coxf79d4092006-05-22 16:55:11 +01002139 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002140 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2141 dpofua = 1 << 4;
2142
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 if (six_byte) {
2144 output_len--;
2145 rbuf[0] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002146 if (minlen > 2)
2147 rbuf[2] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002148 if (ebd) {
2149 if (minlen > 3)
2150 rbuf[3] = sizeof(sat_blk_desc);
2151 if (minlen > 11)
2152 memcpy(rbuf + 4, sat_blk_desc,
2153 sizeof(sat_blk_desc));
2154 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 } else {
2156 output_len -= 2;
2157 rbuf[0] = output_len >> 8;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002158 if (minlen > 1)
2159 rbuf[1] = output_len;
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002160 if (minlen > 3)
2161 rbuf[3] |= dpofua;
Douglas Gilbert00ac37f2005-10-28 15:58:28 -04002162 if (ebd) {
2163 if (minlen > 7)
2164 rbuf[7] = sizeof(sat_blk_desc);
2165 if (minlen > 15)
2166 memcpy(rbuf + 8, sat_blk_desc,
2167 sizeof(sat_blk_desc));
2168 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 return 0;
Douglas Gilbertae006512005-10-09 09:09:35 -04002171
2172invalid_fld:
2173 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2174 /* "Invalid field in cbd" */
2175 return 1;
2176
2177saving_not_supp:
2178 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2179 /* "Saving parameters not supported" */
2180 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181}
2182
2183/**
2184 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2185 * @args: device IDENTIFY data / SCSI command of interest.
2186 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2187 * @buflen: Response buffer length.
2188 *
2189 * Simulate READ CAPACITY commands.
2190 *
2191 * LOCKING:
Tejun Heo6a362612006-11-20 11:15:47 +09002192 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002195 unsigned int buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196{
Tejun Heo6a362612006-11-20 11:15:47 +09002197 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198
2199 VPRINTK("ENTER\n");
2200
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 if (args->cmd->cmnd[0] == READ_CAPACITY) {
Tejun Heo6a362612006-11-20 11:15:47 +09002202 if (last_lba >= 0xffffffffULL)
2203 last_lba = 0xffffffff;
Philip Pokorny0c144d02005-05-28 01:24:47 -07002204
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 /* sector count, 32-bit */
Tejun Heo6a362612006-11-20 11:15:47 +09002206 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2207 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2208 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2209 ATA_SCSI_RBUF_SET(3, last_lba);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210
2211 /* sector size */
Tejun Heo6a362612006-11-20 11:15:47 +09002212 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2213 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 } else {
2215 /* sector count, 64-bit */
Tejun Heo6a362612006-11-20 11:15:47 +09002216 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2217 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2218 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2219 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2220 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2221 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2222 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2223 ATA_SCSI_RBUF_SET(7, last_lba);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224
2225 /* sector size */
Tejun Heo6a362612006-11-20 11:15:47 +09002226 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2227 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 }
2229
2230 return 0;
2231}
2232
2233/**
2234 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2235 * @args: device IDENTIFY data / SCSI command of interest.
2236 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2237 * @buflen: Response buffer length.
2238 *
2239 * Simulate REPORT LUNS command.
2240 *
2241 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002242 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 */
2244
2245unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2246 unsigned int buflen)
2247{
2248 VPRINTK("ENTER\n");
2249 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2250
2251 return 0;
2252}
2253
2254/**
Douglas Gilbert845c5832005-10-09 08:55:41 -04002255 * ata_scsi_set_sense - Set SCSI sense data and status
2256 * @cmd: SCSI request to be handled
2257 * @sk: SCSI-defined sense key
2258 * @asc: SCSI-defined additional sense code
2259 * @ascq: SCSI-defined additional sense code qualifier
2260 *
2261 * Helper function that builds a valid fixed format, current
2262 * response code and the given sense key (sk), additional sense
2263 * code (asc) and additional sense code qualifier (ascq) with
2264 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2265 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2266 *
2267 * LOCKING:
2268 * Not required
2269 */
2270
2271void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2272{
2273 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2274
2275 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2276 cmd->sense_buffer[2] = sk;
2277 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2278 cmd->sense_buffer[12] = asc;
2279 cmd->sense_buffer[13] = ascq;
2280}
2281
2282/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 * ata_scsi_badcmd - End a SCSI request with an error
2284 * @cmd: SCSI request to be handled
2285 * @done: SCSI command completion function
2286 * @asc: SCSI-defined additional sense code
2287 * @ascq: SCSI-defined additional sense code qualifier
2288 *
2289 * Helper function that completes a SCSI command with
2290 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2291 * and the specified additional sense codes.
2292 *
2293 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002294 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 */
2296
2297void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2298{
2299 DPRINTK("ENTER\n");
Douglas Gilbertae006512005-10-09 09:09:35 -04002300 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301
2302 done(cmd);
2303}
2304
Tejun Heo77853bf2006-01-23 13:09:36 +09002305static void atapi_sense_complete(struct ata_queued_cmd *qc)
Jeff Garzika939c962005-10-05 17:09:16 -04002306{
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002307 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002308 /* FIXME: not quite right; we don't want the
2309 * translation of taskfile registers into
2310 * a sense descriptors, since that's only
2311 * correct for ATA, not ATAPI
2312 */
Tejun Heo750426a2006-11-14 22:37:35 +09002313 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002314 }
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002315
2316 qc->scsidone(qc->scsicmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002317 ata_qc_free(qc);
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002318}
2319
2320/* is it pointless to prefer PIO for "safety reasons"? */
2321static inline int ata_pio_use_silly(struct ata_port *ap)
2322{
2323 return (ap->flags & ATA_FLAG_PIO_DMA);
2324}
2325
2326static void atapi_request_sense(struct ata_queued_cmd *qc)
2327{
2328 struct ata_port *ap = qc->ap;
2329 struct scsi_cmnd *cmd = qc->scsicmd;
Jeff Garzika939c962005-10-05 17:09:16 -04002330
2331 DPRINTK("ATAPI request sense\n");
2332
Jeff Garzika939c962005-10-05 17:09:16 -04002333 /* FIXME: is this needed? */
2334 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2335
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002336 ap->ops->tf_read(ap, &qc->tf);
2337
2338 /* fill these in, for the case where they are -not- overwritten */
2339 cmd->sense_buffer[0] = 0x70;
2340 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2341
2342 ata_qc_reinit(qc);
2343
Jeff Garzika939c962005-10-05 17:09:16 -04002344 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2345 qc->dma_dir = DMA_FROM_DEVICE;
2346
Tejun Heo6e7846e2006-02-12 23:32:58 +09002347 memset(&qc->cdb, 0, qc->dev->cdb_len);
Jeff Garzika939c962005-10-05 17:09:16 -04002348 qc->cdb[0] = REQUEST_SENSE;
2349 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2350
2351 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2352 qc->tf.command = ATA_CMD_PACKET;
2353
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002354 if (ata_pio_use_silly(ap)) {
2355 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2356 qc->tf.feature |= ATAPI_PKT_DMA;
2357 } else {
2358 qc->tf.protocol = ATA_PROT_ATAPI;
Alan Cox2db78dd2007-10-02 13:53:04 -07002359 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2360 qc->tf.lbah = 0;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002361 }
Jeff Garzika939c962005-10-05 17:09:16 -04002362 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2363
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002364 qc->complete_fn = atapi_sense_complete;
Jeff Garzika939c962005-10-05 17:09:16 -04002365
Tejun Heo8e0e6942006-03-31 20:41:11 +09002366 ata_qc_issue(qc);
Jeff Garzika939c962005-10-05 17:09:16 -04002367
2368 DPRINTK("EXIT\n");
2369}
2370
Tejun Heo77853bf2006-01-23 13:09:36 +09002371static void atapi_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372{
2373 struct scsi_cmnd *cmd = qc->scsicmd;
Albert Leea22e2eb2005-12-05 15:38:02 +08002374 unsigned int err_mask = qc->err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375
Jeff Garzika7dac442005-10-30 04:44:42 -05002376 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
Jeff Garzike12669e2005-10-05 18:39:23 -04002377
Tejun Heo246619d2006-05-15 20:58:16 +09002378 /* handle completion from new EH */
2379 if (unlikely(qc->ap->ops->error_handler &&
2380 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2381
2382 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2383 /* FIXME: not quite right; we don't want the
2384 * translation of taskfile registers into a
2385 * sense descriptors, since that's only
2386 * correct for ATA, not ATAPI
2387 */
Tejun Heo750426a2006-11-14 22:37:35 +09002388 ata_gen_passthru_sense(qc);
Tejun Heo246619d2006-05-15 20:58:16 +09002389 }
2390
Tejun Heo22aac082006-08-08 14:08:59 +09002391 /* SCSI EH automatically locks door if sdev->locked is
2392 * set. Sometimes door lock request continues to
2393 * fail, for example, when no media is present. This
2394 * creates a loop - SCSI EH issues door lock which
2395 * fails and gets invoked again to acquire sense data
2396 * for the failed command.
2397 *
2398 * If door lock fails, always clear sdev->locked to
2399 * avoid this infinite loop.
2400 */
2401 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2402 qc->dev->sdev->locked = 0;
2403
Tejun Heo246619d2006-05-15 20:58:16 +09002404 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2405 qc->scsidone(cmd);
2406 ata_qc_free(qc);
2407 return;
2408 }
2409
2410 /* successful completion or old EH failure path */
Jeff Garzika7dac442005-10-30 04:44:42 -05002411 if (unlikely(err_mask & AC_ERR_DEV)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 cmd->result = SAM_STAT_CHECK_CONDITION;
Jeff Garzikc6e6e662005-11-14 14:50:05 -05002413 atapi_request_sense(qc);
Tejun Heo77853bf2006-01-23 13:09:36 +09002414 return;
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002415 } else if (unlikely(err_mask)) {
Jeff Garzika7dac442005-10-30 04:44:42 -05002416 /* FIXME: not quite right; we don't want the
2417 * translation of taskfile registers into
2418 * a sense descriptors, since that's only
2419 * correct for ATA, not ATAPI
2420 */
Tejun Heo750426a2006-11-14 22:37:35 +09002421 ata_gen_passthru_sense(qc);
Tejun Heo74e6c8c2006-04-02 18:51:53 +09002422 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 u8 *scsicmd = cmd->cmnd;
2424
Tony Battersbyfd71da42005-12-21 16:35:44 -05002425 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 u8 *buf = NULL;
2427 unsigned int buflen;
2428
2429 buflen = ata_scsi_rbuf_get(cmd, &buf);
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002430
2431 /* ATAPI devices typically report zero for their SCSI version,
2432 * and sometimes deviate from the spec WRT response data
2433 * format. If SCSI version is reported as zero like normal,
2434 * then we make the following fixups: 1) Fake MMC-5 version,
2435 * to indicate to the Linux scsi midlayer this is a modern
2436 * device. 2) Ensure response data format / ATAPI information
2437 * are always correct.
2438 */
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002439 if (buf[2] == 0) {
2440 buf[2] = 0x5;
2441 buf[3] = 0x32;
2442 }
2443
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444 ata_scsi_rbuf_put(cmd, buf);
2445 }
Jeff Garzika15dbeb2005-10-05 15:02:14 -04002446
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447 cmd->result = SAM_STAT_GOOD;
2448 }
2449
2450 qc->scsidone(cmd);
Tejun Heo77853bf2006-01-23 13:09:36 +09002451 ata_qc_free(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452}
2453/**
2454 * atapi_xlat - Initialize PACKET taskfile
2455 * @qc: command structure to be initialized
Linus Torvalds1da177e2005-04-16 15:20:36 -07002456 *
2457 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002458 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 *
2460 * RETURNS:
2461 * Zero on success, non-zero on failure.
2462 */
Tejun Heoad706992006-12-17 10:45:57 +09002463static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464{
Tejun Heo542b1442006-12-17 10:45:08 +09002465 struct scsi_cmnd *scmd = qc->scsicmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002466 struct ata_device *dev = qc->dev;
2467 int using_pio = (dev->flags & ATA_DFLAG_PIO);
Tejun Heo542b1442006-12-17 10:45:08 +09002468 int nodata = (scmd->sc_data_direction == DMA_NONE);
Alan Cox2db78dd2007-10-02 13:53:04 -07002469 unsigned int nbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470
Tejun Heo2e5704f2006-12-17 10:46:33 +09002471 memset(qc->cdb, 0, dev->cdb_len);
2472 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473
2474 qc->complete_fn = atapi_qc_complete;
2475
2476 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
Tejun Heo542b1442006-12-17 10:45:08 +09002477 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002478 qc->tf.flags |= ATA_TFLAG_WRITE;
2479 DPRINTK("direction: write\n");
2480 }
2481
2482 qc->tf.command = ATA_CMD_PACKET;
Boaz Harrosh71201652007-09-18 17:48:50 +02002483 qc->nbytes = scsi_bufflen(scmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002484
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002485 /* check whether ATAPI DMA is safe */
2486 if (!using_pio && ata_check_atapi_dma(qc))
2487 using_pio = 1;
2488
Tejun Heoe1902222007-11-26 20:58:02 +09002489 /* Some controller variants snoop this value for Packet
2490 * transfers to do state machine and FIFO management. Thus we
2491 * want to set it properly, and for DMA where it is
2492 * effectively meaningless.
2493 */
Alan Cox2db78dd2007-10-02 13:53:04 -07002494 nbytes = min(qc->nbytes, (unsigned int)63 * 1024);
2495
Tejun Heoe1902222007-11-26 20:58:02 +09002496 /* Most ATAPI devices which honor transfer chunk size don't
2497 * behave according to the spec when odd chunk size which
2498 * matches the transfer length is specified. If the number of
2499 * bytes to transfer is 2n+1. According to the spec, what
2500 * should happen is to indicate that 2n+1 is going to be
2501 * transferred and transfer 2n+2 bytes where the last byte is
2502 * padding.
2503 *
2504 * In practice, this doesn't happen. ATAPI devices first
2505 * indicate and transfer 2n bytes and then indicate and
2506 * transfer 2 bytes where the last byte is padding.
2507 *
2508 * This inconsistency confuses several controllers which
2509 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2510 * These controllers use actual number of transferred bytes to
2511 * update DMA poitner and transfer of 4n+2 bytes make those
2512 * controller push DMA pointer by 4n+4 bytes because SATA data
2513 * FISes are aligned to 4 bytes. This causes data corruption
2514 * and buffer overrun.
2515 *
2516 * Always setting nbytes to even number solves this problem
2517 * because then ATAPI devices don't have to split data at 2n
2518 * boundaries.
2519 */
2520 if (nbytes & 0x1)
2521 nbytes++;
2522
Alan Cox2db78dd2007-10-02 13:53:04 -07002523 qc->tf.lbam = (nbytes & 0xFF);
2524 qc->tf.lbah = (nbytes >> 8);
2525
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 if (using_pio || nodata) {
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002527 /* no data, or PIO data xfer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002528 if (nodata)
2529 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2530 else
2531 qc->tf.protocol = ATA_PROT_ATAPI;
Tejun Heoe00f1ff2007-06-27 02:47:35 +09002532 } else {
2533 /* DMA data xfer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2535 qc->tf.feature |= ATAPI_PKT_DMA;
2536
Tejun Heo542b1442006-12-17 10:45:08 +09002537 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
Albert Lee95de7192006-04-04 10:57:18 +08002538 /* some SATA bridges need us to indicate data xfer direction */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 qc->tf.feature |= ATAPI_DMADIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540 }
2541
Alan Cox2db78dd2007-10-02 13:53:04 -07002542
2543 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2544 as ATAPI tape drives don't get this right otherwise */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545 return 0;
2546}
2547
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002548static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002549{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002550 if (ap->nr_pmp_links == 0) {
2551 if (likely(devno < ata_link_max_devices(&ap->link)))
2552 return &ap->link.device[devno];
2553 } else {
2554 if (likely(devno < ap->nr_pmp_links))
2555 return &ap->pmp_link[devno].device[0];
2556 }
2557
Tejun Heoab5b3a52006-05-31 18:27:34 +09002558 return NULL;
2559}
2560
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002561static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2562 const struct scsi_device *scsidev)
Tejun Heoab5b3a52006-05-31 18:27:34 +09002563{
Tejun Heo41bda9c2007-08-06 18:36:24 +09002564 int devno;
Tejun Heoab5b3a52006-05-31 18:27:34 +09002565
Tejun Heo41bda9c2007-08-06 18:36:24 +09002566 /* skip commands not addressed to targets we simulate */
2567 if (ap->nr_pmp_links == 0) {
2568 if (unlikely(scsidev->channel || scsidev->lun))
2569 return NULL;
2570 devno = scsidev->id;
2571 } else {
2572 if (unlikely(scsidev->id || scsidev->lun))
2573 return NULL;
2574 devno = scsidev->channel;
2575 }
2576
2577 return ata_find_dev(ap, devno);
Tejun Heoab5b3a52006-05-31 18:27:34 +09002578}
2579
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580/**
Brian King99ba9e02006-06-12 14:54:17 -05002581 * ata_scsi_dev_enabled - determine if device is enabled
2582 * @dev: ATA device
2583 *
2584 * Determine if commands should be sent to the specified device.
2585 *
2586 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002587 * spin_lock_irqsave(host lock)
Brian King99ba9e02006-06-12 14:54:17 -05002588 *
2589 * RETURNS:
2590 * 0 if commands are not allowed / 1 if commands are allowed
2591 */
2592
2593static int ata_scsi_dev_enabled(struct ata_device *dev)
2594{
2595 if (unlikely(!ata_dev_enabled(dev)))
2596 return 0;
2597
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002598 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
Brian King99ba9e02006-06-12 14:54:17 -05002599 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2600 ata_dev_printk(dev, KERN_WARNING,
2601 "WARNING: ATAPI is %s, device ignored.\n",
2602 atapi_enabled ? "not supported with this driver" : "disabled");
2603 return 0;
2604 }
2605 }
2606
2607 return 1;
2608}
2609
2610/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2612 * @ap: ATA port to which the device is attached
2613 * @scsidev: SCSI device from which we derive the ATA device
2614 *
2615 * Given various information provided in struct scsi_cmnd,
2616 * map that onto an ATA bus, and using that mapping
2617 * determine which ata_device is associated with the
2618 * SCSI command to be sent.
2619 *
2620 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002621 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622 *
2623 * RETURNS:
2624 * Associated ATA device, or %NULL if not found.
2625 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002626static struct ata_device *
Jeff Garzik057ace52005-10-22 14:27:05 -04002627ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628{
Tejun Heoab5b3a52006-05-31 18:27:34 +09002629 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630
Brian King99ba9e02006-06-12 14:54:17 -05002631 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632 return NULL;
2633
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634 return dev;
2635}
2636
Jeff Garzikb0955182005-05-12 15:45:22 -04002637/*
2638 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2639 * @byte1: Byte 1 from pass-thru CDB.
2640 *
2641 * RETURNS:
2642 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2643 */
2644static u8
2645ata_scsi_map_proto(u8 byte1)
2646{
2647 switch((byte1 & 0x1e) >> 1) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002648 case 3: /* Non-data */
2649 return ATA_PROT_NODATA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002650
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002651 case 6: /* DMA */
2652 case 10: /* UDMA Data-in */
2653 case 11: /* UDMA Data-Out */
2654 return ATA_PROT_DMA;
Jeff Garzikb0955182005-05-12 15:45:22 -04002655
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002656 case 4: /* PIO Data-in */
2657 case 5: /* PIO Data-out */
2658 return ATA_PROT_PIO;
Jeff Garzikb0955182005-05-12 15:45:22 -04002659
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002660 case 0: /* Hard Reset */
2661 case 1: /* SRST */
2662 case 8: /* Device Diagnostic */
2663 case 9: /* Device Reset */
2664 case 7: /* DMA Queued */
2665 case 12: /* FPDMA */
2666 case 15: /* Return Response Info */
2667 default: /* Reserved */
2668 break;
Jeff Garzikb0955182005-05-12 15:45:22 -04002669 }
2670
2671 return ATA_PROT_UNKNOWN;
2672}
2673
2674/**
2675 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2676 * @qc: command structure to be initialized
Jeff Garzikb0955182005-05-12 15:45:22 -04002677 *
2678 * Handles either 12 or 16-byte versions of the CDB.
2679 *
2680 * RETURNS:
2681 * Zero on success, non-zero on failure.
2682 */
Tejun Heoad706992006-12-17 10:45:57 +09002683static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
Jeff Garzikb0955182005-05-12 15:45:22 -04002684{
2685 struct ata_taskfile *tf = &(qc->tf);
Tejun Heo542b1442006-12-17 10:45:08 +09002686 struct scsi_cmnd *scmd = qc->scsicmd;
Alan Coxf79d4092006-05-22 16:55:11 +01002687 struct ata_device *dev = qc->dev;
Tejun Heoad706992006-12-17 10:45:57 +09002688 const u8 *cdb = scmd->cmnd;
Jeff Garzikb0955182005-05-12 15:45:22 -04002689
Tejun Heo542b1442006-12-17 10:45:08 +09002690 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
Tejun Heo9a405252005-12-02 11:49:11 +09002691 goto invalid_fld;
Jeff Garzik8190bdb2006-05-24 01:53:39 -04002692
Alan Coxf79d4092006-05-22 16:55:11 +01002693 /* We may not issue DMA commands if no DMA mode is set */
2694 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2695 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002696
2697 /*
2698 * 12 and 16 byte CDBs use different offsets to
2699 * provide the various register values.
2700 */
Tejun Heo542b1442006-12-17 10:45:08 +09002701 if (cdb[0] == ATA_16) {
Jeff Garzikb0955182005-05-12 15:45:22 -04002702 /*
2703 * 16-byte CDB - may contain extended commands.
2704 *
2705 * If that is the case, copy the upper byte register values.
2706 */
Tejun Heo542b1442006-12-17 10:45:08 +09002707 if (cdb[1] & 0x01) {
2708 tf->hob_feature = cdb[3];
2709 tf->hob_nsect = cdb[5];
2710 tf->hob_lbal = cdb[7];
2711 tf->hob_lbam = cdb[9];
2712 tf->hob_lbah = cdb[11];
Jeff Garzikb0955182005-05-12 15:45:22 -04002713 tf->flags |= ATA_TFLAG_LBA48;
2714 } else
2715 tf->flags &= ~ATA_TFLAG_LBA48;
2716
2717 /*
2718 * Always copy low byte, device and command registers.
2719 */
Tejun Heo542b1442006-12-17 10:45:08 +09002720 tf->feature = cdb[4];
2721 tf->nsect = cdb[6];
2722 tf->lbal = cdb[8];
2723 tf->lbam = cdb[10];
2724 tf->lbah = cdb[12];
2725 tf->device = cdb[13];
2726 tf->command = cdb[14];
Jeff Garzikb0955182005-05-12 15:45:22 -04002727 } else {
2728 /*
2729 * 12-byte CDB - incapable of extended commands.
2730 */
2731 tf->flags &= ~ATA_TFLAG_LBA48;
2732
Tejun Heo542b1442006-12-17 10:45:08 +09002733 tf->feature = cdb[3];
2734 tf->nsect = cdb[4];
2735 tf->lbal = cdb[5];
2736 tf->lbam = cdb[6];
2737 tf->lbah = cdb[7];
2738 tf->device = cdb[8];
2739 tf->command = cdb[9];
Jeff Garzikb0955182005-05-12 15:45:22 -04002740 }
Albert Leefa4453c2007-06-07 15:52:07 +08002741
2742 /* enforce correct master/slave bit */
2743 tf->device = dev->devno ?
2744 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002745
Albert Lee1dce5892007-06-07 15:49:22 +08002746 /* sanity check for pio multi commands */
2747 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2748 goto invalid_fld;
2749
2750 if (is_multi_taskfile(tf)) {
2751 unsigned int multi_count = 1 << (cdb[1] >> 5);
2752
2753 /* compare the passed through multi_count
2754 * with the cached multi_count of libata
2755 */
2756 if (multi_count != dev->multi_count)
2757 ata_dev_printk(dev, KERN_WARNING,
2758 "invalid multi_count %u ignored\n",
2759 multi_count);
Alan Coxd26fc952007-07-06 19:13:52 -04002760 }
Albert Lee1dce5892007-06-07 15:49:22 +08002761
Mark Lord5a5dbd12007-03-16 10:22:26 -04002762 /* READ/WRITE LONG use a non-standard sect_size */
2763 qc->sect_size = ATA_SECT_SIZE;
2764 switch (tf->command) {
2765 case ATA_CMD_READ_LONG:
2766 case ATA_CMD_READ_LONG_ONCE:
2767 case ATA_CMD_WRITE_LONG:
2768 case ATA_CMD_WRITE_LONG_ONCE:
2769 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2770 goto invalid_fld;
Boaz Harrosh71201652007-09-18 17:48:50 +02002771 qc->sect_size = scsi_bufflen(scmd);
Mark Lord5a5dbd12007-03-16 10:22:26 -04002772 }
2773
Jeff Garzikb0955182005-05-12 15:45:22 -04002774 /*
2775 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2776 * SET_FEATURES - XFER MODE must be preceded/succeeded
2777 * by an update to hardware-specific registers for each
2778 * controller (i.e. the reason for ->set_piomode(),
2779 * ->set_dmamode(), and ->post_set_mode() hooks).
2780 */
2781 if ((tf->command == ATA_CMD_SET_FEATURES)
2782 && (tf->feature == SETFEATURES_XFER))
Tejun Heo9a405252005-12-02 11:49:11 +09002783 goto invalid_fld;
Jeff Garzikb0955182005-05-12 15:45:22 -04002784
2785 /*
2786 * Set flags so that all registers will be written,
2787 * and pass on write indication (used for PIO/DMA
2788 * setup.)
2789 */
2790 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2791
Tejun Heo542b1442006-12-17 10:45:08 +09002792 if (scmd->sc_data_direction == DMA_TO_DEVICE)
Jeff Garzikb0955182005-05-12 15:45:22 -04002793 tf->flags |= ATA_TFLAG_WRITE;
2794
2795 /*
2796 * Set transfer length.
2797 *
2798 * TODO: find out if we need to do more here to
2799 * cover scatter/gather case.
2800 */
Boaz Harrosh71201652007-09-18 17:48:50 +02002801 qc->nbytes = scsi_bufflen(scmd);
Jeff Garzikb0955182005-05-12 15:45:22 -04002802
Tejun Heoe027bd32007-10-26 16:19:26 +09002803 /* request result TF and be quiet about device error */
2804 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
Tejun Heoe61e0672006-05-15 20:57:40 +09002805
Jeff Garzikb0955182005-05-12 15:45:22 -04002806 return 0;
Tejun Heo9a405252005-12-02 11:49:11 +09002807
2808 invalid_fld:
Tejun Heo542b1442006-12-17 10:45:08 +09002809 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
Tejun Heo9a405252005-12-02 11:49:11 +09002810 /* "Invalid field in cdb" */
2811 return 1;
Jeff Garzikb0955182005-05-12 15:45:22 -04002812}
2813
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814/**
2815 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2816 * @dev: ATA device
2817 * @cmd: SCSI command opcode to consider
2818 *
2819 * Look up the SCSI command given, and determine whether the
2820 * SCSI command is to be translated or simulated.
2821 *
2822 * RETURNS:
2823 * Pointer to translation function if possible, %NULL if not.
2824 */
2825
2826static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2827{
2828 switch (cmd) {
2829 case READ_6:
2830 case READ_10:
2831 case READ_16:
2832
2833 case WRITE_6:
2834 case WRITE_10:
2835 case WRITE_16:
2836 return ata_scsi_rw_xlat;
2837
2838 case SYNCHRONIZE_CACHE:
2839 if (ata_try_flush_cache(dev))
2840 return ata_scsi_flush_xlat;
2841 break;
2842
2843 case VERIFY:
2844 case VERIFY_16:
2845 return ata_scsi_verify_xlat;
Jeff Garzikb0955182005-05-12 15:45:22 -04002846
2847 case ATA_12:
2848 case ATA_16:
2849 return ata_scsi_pass_thru;
Jeff Garzikda613962005-08-29 19:01:43 -04002850
Douglas Gilbert972dcaf2005-08-11 03:35:53 -04002851 case START_STOP:
2852 return ata_scsi_start_stop_xlat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853 }
2854
2855 return NULL;
2856}
2857
2858/**
2859 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2860 * @ap: ATA port to which the command was being sent
2861 * @cmd: SCSI command to dump
2862 *
2863 * Prints the contents of a SCSI command via printk().
2864 */
2865
2866static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2867 struct scsi_cmnd *cmd)
2868{
2869#ifdef ATA_DEBUG
2870 struct scsi_device *scsidev = cmd->device;
2871 u8 *scsicmd = cmd->cmnd;
2872
2873 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09002874 ap->print_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875 scsidev->channel, scsidev->id, scsidev->lun,
2876 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2877 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2878 scsicmd[8]);
2879#endif
2880}
2881
Tejun Heo542b1442006-12-17 10:45:08 +09002882static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
Tejun Heo2115ea92006-05-15 21:03:39 +09002883 void (*done)(struct scsi_cmnd *),
2884 struct ata_device *dev)
Brian Kingeb3f0f92006-03-23 17:30:02 -06002885{
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002886 u8 scsi_op = scmd->cmnd[0];
2887 ata_xlat_func_t xlat_func;
Tejun Heo2115ea92006-05-15 21:03:39 +09002888 int rc = 0;
2889
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002890 if (dev->class == ATA_DEV_ATA) {
2891 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2892 goto bad_cdb_len;
2893
2894 xlat_func = ata_get_xlat_func(dev, scsi_op);
2895 } else {
2896 if (unlikely(!scmd->cmd_len))
2897 goto bad_cdb_len;
2898
2899 xlat_func = NULL;
2900 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2901 /* relay SCSI command to ATAPI device */
Mark Lord607126c2007-11-15 13:13:59 +09002902 int len = COMMAND_SIZE(scsi_op);
2903 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002904 goto bad_cdb_len;
2905
2906 xlat_func = atapi_xlat;
2907 } else {
2908 /* ATA_16 passthru, treat as an ATA command */
2909 if (unlikely(scmd->cmd_len > 16))
2910 goto bad_cdb_len;
2911
2912 xlat_func = ata_get_xlat_func(dev, scsi_op);
2913 }
Tejun Heo2e5704f2006-12-17 10:46:33 +09002914 }
2915
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002916 if (xlat_func)
2917 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2918 else
2919 ata_scsi_simulate(dev, scmd, done);
Tejun Heo2115ea92006-05-15 21:03:39 +09002920
2921 return rc;
Mark Lordbaf4fdf2007-08-08 01:08:45 +09002922
2923 bad_cdb_len:
2924 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2925 scmd->cmd_len, scsi_op, dev->cdb_len);
2926 scmd->result = DID_ERROR << 16;
2927 done(scmd);
2928 return 0;
Brian Kingeb3f0f92006-03-23 17:30:02 -06002929}
2930
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931/**
2932 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2933 * @cmd: SCSI command to be sent
2934 * @done: Completion function, called when command is complete
2935 *
2936 * In some cases, this function translates SCSI commands into
2937 * ATA taskfiles, and queues the taskfiles to be sent to
2938 * hardware. In other cases, this function simulates a
2939 * SCSI device by evaluating and responding to certain
2940 * SCSI commands. This creates the overall effect of
2941 * ATA and ATAPI devices appearing as SCSI devices.
2942 *
2943 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002944 * Releases scsi-layer-held lock, and obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945 *
2946 * RETURNS:
Tejun Heo2115ea92006-05-15 21:03:39 +09002947 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2948 * 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002949 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2951{
2952 struct ata_port *ap;
2953 struct ata_device *dev;
2954 struct scsi_device *scsidev = cmd->device;
Jeff Garzik005a5a02005-10-30 23:31:48 -05002955 struct Scsi_Host *shost = scsidev->host;
Tejun Heo2115ea92006-05-15 21:03:39 +09002956 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002957
Jeff Garzik35bb94b2006-04-11 13:12:34 -04002958 ap = ata_shost_to_port(shost);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002959
2960 spin_unlock(shost->host_lock);
Jeff Garzikba6a1302006-06-22 23:46:10 -04002961 spin_lock(ap->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962
2963 ata_scsi_dump_cdb(ap, cmd);
2964
2965 dev = ata_scsi_find_dev(ap, scsidev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002966 if (likely(dev))
Tejun Heo2115ea92006-05-15 21:03:39 +09002967 rc = __ata_scsi_queuecmd(cmd, done, dev);
Brian Kingeb3f0f92006-03-23 17:30:02 -06002968 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002969 cmd->result = (DID_BAD_TARGET << 16);
2970 done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002971 }
2972
Jeff Garzikba6a1302006-06-22 23:46:10 -04002973 spin_unlock(ap->lock);
Jeff Garzik005a5a02005-10-30 23:31:48 -05002974 spin_lock(shost->host_lock);
Tejun Heo2115ea92006-05-15 21:03:39 +09002975 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002976}
2977
2978/**
2979 * ata_scsi_simulate - simulate SCSI command on ATA device
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002980 * @dev: the target device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002981 * @cmd: SCSI command being sent to device.
2982 * @done: SCSI command completion function.
2983 *
2984 * Interprets and directly executes a select list of SCSI commands
2985 * that can be handled internally.
2986 *
2987 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002988 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002989 */
2990
Tejun Heo3373efd2006-05-15 20:57:53 +09002991void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002992 void (*done)(struct scsi_cmnd *))
2993{
2994 struct ata_scsi_args args;
Jeff Garzik057ace52005-10-22 14:27:05 -04002995 const u8 *scsicmd = cmd->cmnd;
Jeff Garzik45394142007-09-21 06:23:42 -04002996 u8 tmp8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997
Tejun Heo9a3dccc2006-01-06 09:56:18 +01002998 args.dev = dev;
2999 args.id = dev->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003000 args.cmd = cmd;
3001 args.done = done;
3002
3003 switch(scsicmd[0]) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003004 /* TODO: worth improving? */
3005 case FORMAT_UNIT:
3006 ata_scsi_invalid_field(cmd, done);
3007 break;
3008
3009 case INQUIRY:
3010 if (scsicmd[1] & 2) /* is CmdDt set? */
Jeff Garzik00bd0202007-09-21 07:26:08 -04003011 ata_scsi_invalid_field(cmd, done);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003012 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3013 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3014 else switch (scsicmd[2]) {
3015 case 0x00:
3016 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003017 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003018 case 0x80:
3019 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003020 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003021 case 0x83:
3022 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003023 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003024 case 0x89:
3025 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003026 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027 default:
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003028 ata_scsi_invalid_field(cmd, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029 break;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003030 }
3031 break;
3032
3033 case MODE_SENSE:
3034 case MODE_SENSE_10:
3035 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3036 break;
3037
3038 case MODE_SELECT: /* unconditionally return */
3039 case MODE_SELECT_10: /* bad-field-in-cdb */
3040 ata_scsi_invalid_field(cmd, done);
3041 break;
3042
3043 case READ_CAPACITY:
3044 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3045 break;
3046
3047 case SERVICE_ACTION_IN:
3048 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3049 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3050 else
3051 ata_scsi_invalid_field(cmd, done);
3052 break;
3053
3054 case REPORT_LUNS:
3055 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3056 break;
3057
3058 case REQUEST_SENSE:
3059 ata_scsi_set_sense(cmd, 0, 0, 0);
3060 cmd->result = (DRIVER_SENSE << 24);
3061 done(cmd);
3062 break;
3063
3064 /* if we reach this, then writeback caching is disabled,
3065 * turning this into a no-op.
3066 */
3067 case SYNCHRONIZE_CACHE:
3068 /* fall through */
3069
3070 /* no-op's, complete with success */
3071 case REZERO_UNIT:
3072 case SEEK_6:
3073 case SEEK_10:
3074 case TEST_UNIT_READY:
3075 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3076 break;
3077
3078 case SEND_DIAGNOSTIC:
3079 tmp8 = scsicmd[1] & ~(1 << 3);
3080 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3081 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3082 else
3083 ata_scsi_invalid_field(cmd, done);
3084 break;
3085
3086 /* all other commands */
3087 default:
3088 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3089 /* "Invalid command operation code" */
3090 done(cmd);
3091 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092 }
3093}
3094
Tejun Heof3187192007-04-17 23:44:07 +09003095int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3096{
3097 int i, rc;
3098
3099 for (i = 0; i < host->n_ports; i++) {
3100 struct ata_port *ap = host->ports[i];
3101 struct Scsi_Host *shost;
3102
3103 rc = -ENOMEM;
3104 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3105 if (!shost)
3106 goto err_alloc;
3107
3108 *(struct ata_port **)&shost->hostdata[0] = ap;
3109 ap->scsi_host = shost;
3110
3111 shost->transportt = &ata_scsi_transport_template;
3112 shost->unique_id = ap->print_id;
3113 shost->max_id = 16;
3114 shost->max_lun = 1;
3115 shost->max_channel = 1;
3116 shost->max_cmd_len = 16;
3117
Tejun Heo31cc23b2007-09-23 13:14:12 +09003118 /* Schedule policy is determined by ->qc_defer()
3119 * callback and it needs to see every deferred qc.
3120 * Set host_blocked to 1 to prevent SCSI midlayer from
3121 * automatically deferring requests.
3122 */
3123 shost->max_host_blocked = 1;
3124
Tejun Heof3187192007-04-17 23:44:07 +09003125 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3126 if (rc)
3127 goto err_add;
3128 }
3129
3130 return 0;
3131
3132 err_add:
3133 scsi_host_put(host->ports[i]->scsi_host);
3134 err_alloc:
3135 while (--i >= 0) {
3136 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3137
3138 scsi_remove_host(shost);
3139 scsi_host_put(shost);
3140 }
3141 return rc;
3142}
3143
Tejun Heo1ae46312007-07-16 14:29:40 +09003144void ata_scsi_scan_host(struct ata_port *ap, int sync)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003145{
Tejun Heo1ae46312007-07-16 14:29:40 +09003146 int tries = 5;
3147 struct ata_device *last_failed_dev = NULL;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003148 struct ata_link *link;
Tejun Heo1ae46312007-07-16 14:29:40 +09003149 struct ata_device *dev;
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003150
Tejun Heo198e0fe2006-04-02 18:51:52 +09003151 if (ap->flags & ATA_FLAG_DISABLED)
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003152 return;
3153
Tejun Heo1ae46312007-07-16 14:29:40 +09003154 repeat:
Tejun Heo41bda9c2007-08-06 18:36:24 +09003155 ata_port_for_each_link(link, ap) {
3156 ata_link_for_each_dev(dev, link) {
3157 struct scsi_device *sdev;
3158 int channel = 0, id = 0;
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003159
Tejun Heo41bda9c2007-08-06 18:36:24 +09003160 if (!ata_dev_enabled(dev) || dev->sdev)
3161 continue;
Tejun Heo3edebac2006-05-31 18:27:40 +09003162
Tejun Heo41bda9c2007-08-06 18:36:24 +09003163 if (ata_is_host_link(link))
3164 id = dev->devno;
3165 else
3166 channel = link->pmp;
3167
3168 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3169 NULL);
3170 if (!IS_ERR(sdev)) {
3171 dev->sdev = sdev;
3172 scsi_device_put(sdev);
3173 }
Tejun Heo3edebac2006-05-31 18:27:40 +09003174 }
Jeff Garzik3f19ee82005-10-03 21:36:41 -04003175 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003176
3177 /* If we scanned while EH was in progress or allocation
3178 * failure occurred, scan would have failed silently. Check
3179 * whether all devices are attached.
3180 */
Tejun Heo41bda9c2007-08-06 18:36:24 +09003181 ata_port_for_each_link(link, ap) {
3182 ata_link_for_each_dev(dev, link) {
3183 if (ata_dev_enabled(dev) && !dev->sdev)
3184 goto exit_loop;
3185 }
Tejun Heo1ae46312007-07-16 14:29:40 +09003186 }
Tejun Heo41bda9c2007-08-06 18:36:24 +09003187 exit_loop:
3188 if (!link)
Tejun Heo1ae46312007-07-16 14:29:40 +09003189 return;
3190
3191 /* we're missing some SCSI devices */
3192 if (sync) {
3193 /* If caller requested synchrnous scan && we've made
3194 * any progress, sleep briefly and repeat.
3195 */
3196 if (dev != last_failed_dev) {
3197 msleep(100);
3198 last_failed_dev = dev;
3199 goto repeat;
3200 }
3201
3202 /* We might be failing to detect boot device, give it
3203 * a few more chances.
3204 */
3205 if (--tries) {
3206 msleep(100);
3207 goto repeat;
3208 }
3209
3210 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3211 "failed without making any progress,\n"
3212 " switching to async\n");
3213 }
3214
3215 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3216 round_jiffies_relative(HZ));
Jeff Garzik644dd0c2005-10-03 15:55:19 -04003217}
Tejun Heo0ea035a2006-05-31 18:28:01 +09003218
3219/**
3220 * ata_scsi_offline_dev - offline attached SCSI device
3221 * @dev: ATA device to offline attached SCSI device for
3222 *
3223 * This function is called from ata_eh_hotplug() and responsible
3224 * for taking the SCSI device attached to @dev offline. This
Jeff Garzikcca39742006-08-24 03:19:22 -04003225 * function is called with host lock which protects dev->sdev
Tejun Heo0ea035a2006-05-31 18:28:01 +09003226 * against clearing.
3227 *
3228 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003229 * spin_lock_irqsave(host lock)
Tejun Heo0ea035a2006-05-31 18:28:01 +09003230 *
3231 * RETURNS:
3232 * 1 if attached SCSI device exists, 0 otherwise.
3233 */
3234int ata_scsi_offline_dev(struct ata_device *dev)
3235{
3236 if (dev->sdev) {
3237 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3238 return 1;
3239 }
3240 return 0;
3241}
Tejun Heo580b2102006-05-31 18:28:05 +09003242
3243/**
3244 * ata_scsi_remove_dev - remove attached SCSI device
3245 * @dev: ATA device to remove attached SCSI device for
3246 *
3247 * This function is called from ata_eh_scsi_hotplug() and
3248 * responsible for removing the SCSI device attached to @dev.
3249 *
3250 * LOCKING:
3251 * Kernel thread context (may sleep).
3252 */
3253static void ata_scsi_remove_dev(struct ata_device *dev)
3254{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003255 struct ata_port *ap = dev->link->ap;
Tejun Heo580b2102006-05-31 18:28:05 +09003256 struct scsi_device *sdev;
3257 unsigned long flags;
3258
3259 /* Alas, we need to grab scan_mutex to ensure SCSI device
3260 * state doesn't change underneath us and thus
3261 * scsi_device_get() always succeeds. The mutex locking can
3262 * be removed if there is __scsi_device_get() interface which
3263 * increments reference counts regardless of device state.
3264 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003265 mutex_lock(&ap->scsi_host->scan_mutex);
Jeff Garzikba6a1302006-06-22 23:46:10 -04003266 spin_lock_irqsave(ap->lock, flags);
Tejun Heo580b2102006-05-31 18:28:05 +09003267
Jeff Garzikcca39742006-08-24 03:19:22 -04003268 /* clearing dev->sdev is protected by host lock */
Tejun Heo580b2102006-05-31 18:28:05 +09003269 sdev = dev->sdev;
3270 dev->sdev = NULL;
3271
3272 if (sdev) {
3273 /* If user initiated unplug races with us, sdev can go
Jeff Garzikcca39742006-08-24 03:19:22 -04003274 * away underneath us after the host lock and
Tejun Heo580b2102006-05-31 18:28:05 +09003275 * scan_mutex are released. Hold onto it.
3276 */
3277 if (scsi_device_get(sdev) == 0) {
3278 /* The following ensures the attached sdev is
3279 * offline on return from ata_scsi_offline_dev()
3280 * regardless it wins or loses the race
3281 * against this function.
3282 */
3283 scsi_device_set_state(sdev, SDEV_OFFLINE);
3284 } else {
3285 WARN_ON(1);
3286 sdev = NULL;
3287 }
3288 }
3289
Jeff Garzikba6a1302006-06-22 23:46:10 -04003290 spin_unlock_irqrestore(ap->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -04003291 mutex_unlock(&ap->scsi_host->scan_mutex);
Tejun Heo580b2102006-05-31 18:28:05 +09003292
3293 if (sdev) {
3294 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3295 sdev->sdev_gendev.bus_id);
3296
3297 scsi_remove_device(sdev);
3298 scsi_device_put(sdev);
3299 }
3300}
3301
Tejun Heo41bda9c2007-08-06 18:36:24 +09003302static void ata_scsi_handle_link_detach(struct ata_link *link)
3303{
3304 struct ata_port *ap = link->ap;
3305 struct ata_device *dev;
3306
3307 ata_link_for_each_dev(dev, link) {
3308 unsigned long flags;
3309
3310 if (!(dev->flags & ATA_DFLAG_DETACHED))
3311 continue;
3312
3313 spin_lock_irqsave(ap->lock, flags);
3314 dev->flags &= ~ATA_DFLAG_DETACHED;
3315 spin_unlock_irqrestore(ap->lock, flags);
3316
3317 ata_scsi_remove_dev(dev);
3318 }
3319}
3320
Tejun Heo580b2102006-05-31 18:28:05 +09003321/**
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003322 * ata_scsi_media_change_notify - send media change event
Randy Dunlapc5d0e6a2007-10-15 17:29:46 -07003323 * @dev: Pointer to the disk device with media change event
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003324 *
3325 * Tell the block layer to send a media change notification
3326 * event.
3327 *
3328 * LOCKING:
Tejun Heo854c73a2007-09-23 13:14:11 +09003329 * spin_lock_irqsave(host lock)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003330 */
Tejun Heo854c73a2007-09-23 13:14:11 +09003331void ata_scsi_media_change_notify(struct ata_device *dev)
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003332{
Tejun Heo854c73a2007-09-23 13:14:11 +09003333 if (dev->sdev)
Jeff Garzikf26792d2007-10-29 17:18:39 -04003334 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3335 GFP_ATOMIC);
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003336}
Kristen Carlson Accardi2f294962007-08-15 04:11:25 -04003337
3338/**
Tejun Heo580b2102006-05-31 18:28:05 +09003339 * ata_scsi_hotplug - SCSI part of hotplug
David Howells65f27f32006-11-22 14:55:48 +00003340 * @work: Pointer to ATA port to perform SCSI hotplug on
Tejun Heo580b2102006-05-31 18:28:05 +09003341 *
3342 * Perform SCSI part of hotplug. It's executed from a separate
3343 * workqueue after EH completes. This is necessary because SCSI
3344 * hot plugging requires working EH and hot unplugging is
3345 * synchronized with hot plugging with a mutex.
3346 *
3347 * LOCKING:
3348 * Kernel thread context (may sleep).
3349 */
David Howells65f27f32006-11-22 14:55:48 +00003350void ata_scsi_hotplug(struct work_struct *work)
Tejun Heo580b2102006-05-31 18:28:05 +09003351{
David Howells65f27f32006-11-22 14:55:48 +00003352 struct ata_port *ap =
3353 container_of(work, struct ata_port, hotplug_task.work);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003354 int i;
Tejun Heo580b2102006-05-31 18:28:05 +09003355
Tejun Heob51e9e52006-06-29 01:29:30 +09003356 if (ap->pflags & ATA_PFLAG_UNLOADING) {
Tejun Heo580b2102006-05-31 18:28:05 +09003357 DPRINTK("ENTER/EXIT - unloading\n");
3358 return;
3359 }
3360
3361 DPRINTK("ENTER\n");
3362
Tejun Heo41bda9c2007-08-06 18:36:24 +09003363 /* Unplug detached devices. We cannot use link iterator here
3364 * because PMP links have to be scanned even if PMP is
3365 * currently not attached. Iterate manually.
3366 */
3367 ata_scsi_handle_link_detach(&ap->link);
3368 if (ap->pmp_link)
3369 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3370 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
Tejun Heo580b2102006-05-31 18:28:05 +09003371
3372 /* scan for new ones */
Tejun Heo1ae46312007-07-16 14:29:40 +09003373 ata_scsi_scan_host(ap, 0);
Tejun Heo580b2102006-05-31 18:28:05 +09003374
3375 DPRINTK("EXIT\n");
3376}
Tejun Heo83c47bc2006-05-31 18:28:07 +09003377
3378/**
3379 * ata_scsi_user_scan - indication for user-initiated bus scan
3380 * @shost: SCSI host to scan
3381 * @channel: Channel to scan
3382 * @id: ID to scan
3383 * @lun: LUN to scan
3384 *
3385 * This function is called when user explicitly requests bus
3386 * scan. Set probe pending flag and invoke EH.
3387 *
3388 * LOCKING:
3389 * SCSI layer (we don't care)
3390 *
3391 * RETURNS:
3392 * Zero.
3393 */
3394static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3395 unsigned int id, unsigned int lun)
3396{
3397 struct ata_port *ap = ata_shost_to_port(shost);
3398 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09003399 int devno, rc = 0;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003400
3401 if (!ap->ops->error_handler)
3402 return -EOPNOTSUPP;
3403
Tejun Heo41bda9c2007-08-06 18:36:24 +09003404 if (lun != SCAN_WILD_CARD && lun)
Tejun Heo83c47bc2006-05-31 18:28:07 +09003405 return -EINVAL;
3406
Tejun Heo41bda9c2007-08-06 18:36:24 +09003407 if (ap->nr_pmp_links == 0) {
3408 if (channel != SCAN_WILD_CARD && channel)
3409 return -EINVAL;
3410 devno = id;
3411 } else {
3412 if (id != SCAN_WILD_CARD && id)
3413 return -EINVAL;
3414 devno = channel;
3415 }
3416
Jeff Garzikba6a1302006-06-22 23:46:10 -04003417 spin_lock_irqsave(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003418
Tejun Heo41bda9c2007-08-06 18:36:24 +09003419 if (devno == SCAN_WILD_CARD) {
3420 struct ata_link *link;
3421
3422 ata_port_for_each_link(link, ap) {
3423 struct ata_eh_info *ehi = &link->eh_info;
3424 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3425 ehi->action |= ATA_EH_SOFTRESET;
3426 }
Tejun Heo83c47bc2006-05-31 18:28:07 +09003427 } else {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003428 struct ata_device *dev = ata_find_dev(ap, devno);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003429
3430 if (dev) {
Tejun Heo41bda9c2007-08-06 18:36:24 +09003431 struct ata_eh_info *ehi = &dev->link->eh_info;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003432 ehi->probe_mask |= 1 << dev->devno;
3433 ehi->action |= ATA_EH_SOFTRESET;
3434 ehi->flags |= ATA_EHI_RESUME_LINK;
Tejun Heo83c47bc2006-05-31 18:28:07 +09003435 } else
3436 rc = -EINVAL;
3437 }
3438
Tejun Heo309afcb2006-09-30 18:07:17 +09003439 if (rc == 0) {
Tejun Heo83c47bc2006-05-31 18:28:07 +09003440 ata_port_schedule_eh(ap);
Tejun Heo309afcb2006-09-30 18:07:17 +09003441 spin_unlock_irqrestore(ap->lock, flags);
3442 ata_port_wait_eh(ap);
3443 } else
3444 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo83c47bc2006-05-31 18:28:07 +09003445
3446 return rc;
3447}
zhao, forrest3057ac32006-06-12 12:01:34 +08003448
3449/**
Tejun Heod0171262006-06-12 22:51:14 +09003450 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
David Howells65f27f32006-11-22 14:55:48 +00003451 * @work: Pointer to ATA port to perform scsi_rescan_device()
zhao, forrest3057ac32006-06-12 12:01:34 +08003452 *
Tejun Heod0171262006-06-12 22:51:14 +09003453 * After ATA pass thru (SAT) commands are executed successfully,
3454 * libata need to propagate the changes to SCSI layer. This
3455 * function must be executed from ata_aux_wq such that sdev
3456 * attach/detach don't race with rescan.
zhao, forrest3057ac32006-06-12 12:01:34 +08003457 *
Tejun Heod0171262006-06-12 22:51:14 +09003458 * LOCKING:
3459 * Kernel thread context (may sleep).
zhao, forrest3057ac32006-06-12 12:01:34 +08003460 */
David Howells65f27f32006-11-22 14:55:48 +00003461void ata_scsi_dev_rescan(struct work_struct *work)
zhao, forrest3057ac32006-06-12 12:01:34 +08003462{
David Howells65f27f32006-11-22 14:55:48 +00003463 struct ata_port *ap =
3464 container_of(work, struct ata_port, scsi_rescan_task);
Tejun Heo41bda9c2007-08-06 18:36:24 +09003465 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09003466 struct ata_device *dev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003467 unsigned long flags;
zhao, forrest3057ac32006-06-12 12:01:34 +08003468
Tejun Heof84e7e42006-11-22 11:21:31 +09003469 spin_lock_irqsave(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003470
Tejun Heo41bda9c2007-08-06 18:36:24 +09003471 ata_port_for_each_link(link, ap) {
3472 ata_link_for_each_dev(dev, link) {
3473 struct scsi_device *sdev = dev->sdev;
Tejun Heof84e7e42006-11-22 11:21:31 +09003474
Tejun Heo41bda9c2007-08-06 18:36:24 +09003475 if (!ata_dev_enabled(dev) || !sdev)
3476 continue;
3477 if (scsi_device_get(sdev))
3478 continue;
Tejun Heof84e7e42006-11-22 11:21:31 +09003479
Tejun Heo41bda9c2007-08-06 18:36:24 +09003480 spin_unlock_irqrestore(ap->lock, flags);
3481 scsi_rescan_device(&(sdev->sdev_gendev));
3482 scsi_device_put(sdev);
3483 spin_lock_irqsave(ap->lock, flags);
3484 }
zhao, forrest3057ac32006-06-12 12:01:34 +08003485 }
Tejun Heof84e7e42006-11-22 11:21:31 +09003486
3487 spin_unlock_irqrestore(ap->lock, flags);
zhao, forrest3057ac32006-06-12 12:01:34 +08003488}
Brian King80289162006-08-07 14:27:31 -05003489
3490/**
3491 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
Jeff Garzik4f931372006-09-29 05:07:25 -04003492 * @host: ATA host container for all SAS ports
Brian King80289162006-08-07 14:27:31 -05003493 * @port_info: Information from low-level host driver
Jeff Garzikcca39742006-08-24 03:19:22 -04003494 * @shost: SCSI host that the scsi device is attached to
Brian King80289162006-08-07 14:27:31 -05003495 *
3496 * LOCKING:
3497 * PCI/etc. bus probe sem.
3498 *
3499 * RETURNS:
3500 * ata_port pointer on success / NULL on failure.
3501 */
3502
Jeff Garzikcca39742006-08-24 03:19:22 -04003503struct ata_port *ata_sas_port_alloc(struct ata_host *host,
Brian King80289162006-08-07 14:27:31 -05003504 struct ata_port_info *port_info,
Jeff Garzikcca39742006-08-24 03:19:22 -04003505 struct Scsi_Host *shost)
Brian King80289162006-08-07 14:27:31 -05003506{
Tejun Heof3187192007-04-17 23:44:07 +09003507 struct ata_port *ap;
Brian King80289162006-08-07 14:27:31 -05003508
Tejun Heof3187192007-04-17 23:44:07 +09003509 ap = ata_port_alloc(host);
Brian King80289162006-08-07 14:27:31 -05003510 if (!ap)
3511 return NULL;
3512
Tejun Heof3187192007-04-17 23:44:07 +09003513 ap->port_no = 0;
Jeff Garzikcca39742006-08-24 03:19:22 -04003514 ap->lock = shost->host_lock;
Tejun Heof3187192007-04-17 23:44:07 +09003515 ap->pio_mask = port_info->pio_mask;
3516 ap->mwdma_mask = port_info->mwdma_mask;
3517 ap->udma_mask = port_info->udma_mask;
3518 ap->flags |= port_info->flags;
3519 ap->ops = port_info->port_ops;
3520 ap->cbl = ATA_CBL_SATA;
3521
Brian King80289162006-08-07 14:27:31 -05003522 return ap;
3523}
3524EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3525
3526/**
3527 * ata_sas_port_start - Set port up for dma.
3528 * @ap: Port to initialize
3529 *
3530 * Called just after data structures for each port are
3531 * initialized. Allocates DMA pad.
3532 *
3533 * May be used as the port_start() entry in ata_port_operations.
3534 *
3535 * LOCKING:
3536 * Inherited from caller.
3537 */
3538int ata_sas_port_start(struct ata_port *ap)
3539{
3540 return ata_pad_alloc(ap, ap->dev);
3541}
3542EXPORT_SYMBOL_GPL(ata_sas_port_start);
3543
3544/**
3545 * ata_port_stop - Undo ata_sas_port_start()
3546 * @ap: Port to shut down
3547 *
3548 * Frees the DMA pad.
3549 *
3550 * May be used as the port_stop() entry in ata_port_operations.
3551 *
3552 * LOCKING:
3553 * Inherited from caller.
3554 */
3555
3556void ata_sas_port_stop(struct ata_port *ap)
3557{
3558 ata_pad_free(ap, ap->dev);
3559}
3560EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3561
3562/**
3563 * ata_sas_port_init - Initialize a SATA device
3564 * @ap: SATA port to initialize
3565 *
3566 * LOCKING:
3567 * PCI/etc. bus probe sem.
3568 *
3569 * RETURNS:
3570 * Zero on success, non-zero on error.
3571 */
3572
3573int ata_sas_port_init(struct ata_port *ap)
3574{
3575 int rc = ap->ops->port_start(ap);
3576
Tejun Heof3187192007-04-17 23:44:07 +09003577 if (!rc) {
3578 ap->print_id = ata_print_id++;
Brian King80289162006-08-07 14:27:31 -05003579 rc = ata_bus_probe(ap);
Tejun Heof3187192007-04-17 23:44:07 +09003580 }
Brian King80289162006-08-07 14:27:31 -05003581
3582 return rc;
3583}
3584EXPORT_SYMBOL_GPL(ata_sas_port_init);
3585
3586/**
3587 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3588 * @ap: SATA port to destroy
3589 *
3590 */
3591
3592void ata_sas_port_destroy(struct ata_port *ap)
3593{
Tejun Heof0d36ef2007-01-20 16:00:28 +09003594 if (ap->ops->port_stop)
3595 ap->ops->port_stop(ap);
Brian King80289162006-08-07 14:27:31 -05003596 kfree(ap);
3597}
3598EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3599
3600/**
3601 * ata_sas_slave_configure - Default slave_config routine for libata devices
3602 * @sdev: SCSI device to configure
3603 * @ap: ATA port to which SCSI device is attached
3604 *
3605 * RETURNS:
3606 * Zero.
3607 */
3608
3609int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3610{
3611 ata_scsi_sdev_config(sdev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003612 ata_scsi_dev_config(sdev, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003613 return 0;
3614}
3615EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3616
3617/**
3618 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3619 * @cmd: SCSI command to be sent
3620 * @done: Completion function, called when command is complete
3621 * @ap: ATA port to which the command is being sent
3622 *
3623 * RETURNS:
Brian King08475a12006-11-20 13:51:56 -06003624 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3625 * 0 otherwise.
Brian King80289162006-08-07 14:27:31 -05003626 */
3627
3628int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3629 struct ata_port *ap)
3630{
Brian King08475a12006-11-20 13:51:56 -06003631 int rc = 0;
3632
Brian King80289162006-08-07 14:27:31 -05003633 ata_scsi_dump_cdb(ap, cmd);
3634
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003635 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3636 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
Brian King80289162006-08-07 14:27:31 -05003637 else {
3638 cmd->result = (DID_BAD_TARGET << 16);
3639 done(cmd);
3640 }
Brian King08475a12006-11-20 13:51:56 -06003641 return rc;
Brian King80289162006-08-07 14:27:31 -05003642}
3643EXPORT_SYMBOL_GPL(ata_sas_queuecmd);