2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
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)
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.
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.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <linux/uaccess.h>
52 #define SECTOR_SIZE 512
53 #define ATA_SCSI_RBUF_SIZE 4096
55 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
56 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
58 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
60 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
61 const struct scsi_device *scsidev);
62 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
63 const struct scsi_device *scsidev);
64 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
65 unsigned int id, unsigned int lun);
68 #define RW_RECOVERY_MPAGE 0x1
69 #define RW_RECOVERY_MPAGE_LEN 12
70 #define CACHE_MPAGE 0x8
71 #define CACHE_MPAGE_LEN 20
72 #define CONTROL_MPAGE 0xa
73 #define CONTROL_MPAGE_LEN 12
74 #define ALL_MPAGES 0x3f
75 #define ALL_SUB_MPAGES 0xff
78 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
80 RW_RECOVERY_MPAGE_LEN - 2,
82 0, /* read retry count */
84 0, /* write retry count */
88 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
97 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
110 static struct scsi_transport_template ata_scsi_transport_template = {
111 .eh_strategy_handler = ata_scsi_error,
112 .eh_timed_out = ata_scsi_timed_out,
113 .user_scan = ata_scsi_user_scan,
117 static const struct {
120 } link_pm_policy[] = {
121 { NOT_AVAILABLE, "max_performance" },
122 { MIN_POWER, "min_power" },
123 { MAX_PERFORMANCE, "max_performance" },
124 { MEDIUM_POWER, "medium_power" },
127 static const char *ata_scsi_lpm_get(enum link_pm policy)
131 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
132 if (link_pm_policy[i].value == policy)
133 return link_pm_policy[i].name;
138 static ssize_t ata_scsi_lpm_put(struct device *dev,
139 struct device_attribute *attr,
140 const char *buf, size_t count)
142 struct Scsi_Host *shost = class_to_shost(dev);
143 struct ata_port *ap = ata_shost_to_port(shost);
144 enum link_pm policy = 0;
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
154 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
155 const int len = strlen(link_pm_policy[i].name);
156 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
158 policy = link_pm_policy[i].value;
165 ata_lpm_schedule(ap, policy);
170 ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
172 struct Scsi_Host *shost = class_to_shost(dev);
173 struct ata_port *ap = ata_shost_to_port(shost);
175 ata_scsi_lpm_get(ap->pm_policy);
180 return snprintf(buf, 23, "%s\n", policy);
182 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
183 ata_scsi_lpm_show, ata_scsi_lpm_put);
184 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
186 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
188 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
190 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
194 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
195 const char *buf, size_t count)
197 struct Scsi_Host *shost = class_to_shost(dev);
198 struct ata_port *ap = ata_shost_to_port(shost);
199 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
200 return ap->ops->em_store(ap, buf, count);
205 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
208 struct Scsi_Host *shost = class_to_shost(dev);
209 struct ata_port *ap = ata_shost_to_port(shost);
211 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
212 return ap->ops->em_show(ap, buf);
215 DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
216 ata_scsi_em_message_show, ata_scsi_em_message_store);
217 EXPORT_SYMBOL_GPL(dev_attr_em_message);
220 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
223 struct Scsi_Host *shost = class_to_shost(dev);
224 struct ata_port *ap = ata_shost_to_port(shost);
226 return snprintf(buf, 23, "%d\n", ap->em_message_type);
228 DEVICE_ATTR(em_message_type, S_IRUGO,
229 ata_scsi_em_message_type_show, NULL);
230 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
233 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
236 struct scsi_device *sdev = to_scsi_device(dev);
237 struct ata_port *ap = ata_shost_to_port(sdev->host);
238 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
240 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
241 return ap->ops->sw_activity_show(atadev, buf);
246 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
247 const char *buf, size_t count)
249 struct scsi_device *sdev = to_scsi_device(dev);
250 struct ata_port *ap = ata_shost_to_port(sdev->host);
251 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
252 enum sw_activity val;
255 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
256 val = simple_strtoul(buf, NULL, 0);
258 case OFF: case BLINK_ON: case BLINK_OFF:
259 rc = ap->ops->sw_activity_store(atadev, val);
268 DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
269 ata_scsi_activity_store);
270 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
272 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
273 void (*done)(struct scsi_cmnd *))
275 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
276 /* "Invalid field in cbd" */
281 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
282 * @sdev: SCSI device for which BIOS geometry is to be determined
283 * @bdev: block device associated with @sdev
284 * @capacity: capacity of SCSI device
285 * @geom: location to which geometry will be output
287 * Generic bios head/sector/cylinder calculator
288 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
289 * mapping. Some situations may arise where the disk is not
290 * bootable if this is not used.
293 * Defined by the SCSI layer. We don't really care.
298 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
299 sector_t capacity, int geom[])
303 sector_div(capacity, 255*63);
310 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
311 * @sdev: SCSI device to get identify data for
312 * @arg: User buffer area for identify data
315 * Defined by the SCSI layer. We don't really care.
318 * Zero on success, negative errno on error.
320 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
322 struct ata_port *ap = ata_shost_to_port(sdev->host);
323 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
324 u16 __user *dst = arg;
330 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
333 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
334 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
337 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
338 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
341 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
342 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
349 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
350 * @scsidev: Device to which we are issuing command
351 * @arg: User provided data for issuing command
354 * Defined by the SCSI layer. We don't really care.
357 * Zero on success, negative errno on error.
359 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
362 u8 scsi_cmd[MAX_COMMAND_SIZE];
363 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
365 enum dma_data_direction data_dir;
371 if (copy_from_user(args, arg, sizeof(args)))
374 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
378 memset(scsi_cmd, 0, sizeof(scsi_cmd));
381 argsize = SECTOR_SIZE * args[3];
382 argbuf = kmalloc(argsize, GFP_KERNEL);
383 if (argbuf == NULL) {
388 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
389 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
390 block count in sector count field */
391 data_dir = DMA_FROM_DEVICE;
393 scsi_cmd[1] = (3 << 1); /* Non-data */
394 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
398 scsi_cmd[0] = ATA_16;
400 scsi_cmd[4] = args[2];
401 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
402 scsi_cmd[6] = args[3];
403 scsi_cmd[8] = args[1];
407 scsi_cmd[6] = args[1];
409 scsi_cmd[14] = args[0];
411 /* Good values for timeout and retries? Values below
412 from scsi_ioctl_send_command() for default case... */
413 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
414 sensebuf, (10*HZ), 5, 0);
416 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
417 u8 *desc = sensebuf + 8;
418 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
420 /* If we set cc then ATA pass-through will cause a
421 * check condition even if no error. Filter that. */
422 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
423 struct scsi_sense_hdr sshdr;
424 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
426 if (sshdr.sense_key == 0 &&
427 sshdr.asc == 0 && sshdr.ascq == 0)
428 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
431 /* Send userspace a few ATA registers (same as drivers/ide) */
432 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
433 desc[0] == 0x09) { /* code is "ATA Descriptor" */
434 args[0] = desc[13]; /* status */
435 args[1] = desc[3]; /* error */
436 args[2] = desc[5]; /* sector count (0:7) */
437 if (copy_to_user(arg, args, sizeof(args)))
449 && copy_to_user(arg + sizeof(args), argbuf, argsize))
458 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
459 * @scsidev: Device to which we are issuing command
460 * @arg: User provided data for issuing command
463 * Defined by the SCSI layer. We don't really care.
466 * Zero on success, negative errno on error.
468 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
471 u8 scsi_cmd[MAX_COMMAND_SIZE];
472 u8 args[7], *sensebuf = NULL;
478 if (copy_from_user(args, arg, sizeof(args)))
481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
485 memset(scsi_cmd, 0, sizeof(scsi_cmd));
486 scsi_cmd[0] = ATA_16;
487 scsi_cmd[1] = (3 << 1); /* Non-data */
488 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
489 scsi_cmd[4] = args[1];
490 scsi_cmd[6] = args[2];
491 scsi_cmd[8] = args[3];
492 scsi_cmd[10] = args[4];
493 scsi_cmd[12] = args[5];
494 scsi_cmd[13] = args[6] & 0x4f;
495 scsi_cmd[14] = args[0];
497 /* Good values for timeout and retries? Values below
498 from scsi_ioctl_send_command() for default case... */
499 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
500 sensebuf, (10*HZ), 5, 0);
502 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
503 u8 *desc = sensebuf + 8;
504 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
506 /* If we set cc then ATA pass-through will cause a
507 * check condition even if no error. Filter that. */
508 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
509 struct scsi_sense_hdr sshdr;
510 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
512 if (sshdr.sense_key == 0 &&
513 sshdr.asc == 0 && sshdr.ascq == 0)
514 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
517 /* Send userspace ATA registers */
518 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
519 desc[0] == 0x09) {/* code is "ATA Descriptor" */
520 args[0] = desc[13]; /* status */
521 args[1] = desc[3]; /* error */
522 args[2] = desc[5]; /* sector count (0:7) */
523 args[3] = desc[7]; /* lbal */
524 args[4] = desc[9]; /* lbam */
525 args[5] = desc[11]; /* lbah */
526 args[6] = desc[12]; /* select */
527 if (copy_to_user(arg, args, sizeof(args)))
542 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
544 int val = -EINVAL, rc = -EINVAL;
547 case ATA_IOC_GET_IO32:
549 if (copy_to_user(arg, &val, 1))
553 case ATA_IOC_SET_IO32:
554 val = (unsigned long) arg;
559 case HDIO_GET_IDENTITY:
560 return ata_get_identity(scsidev, arg);
563 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
565 return ata_cmd_ioctl(scsidev, arg);
567 case HDIO_DRIVE_TASK:
568 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
570 return ata_task_ioctl(scsidev, arg);
581 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
582 * @dev: ATA device to which the new command is attached
583 * @cmd: SCSI command that originated this ATA command
584 * @done: SCSI command completion function
586 * Obtain a reference to an unused ata_queued_cmd structure,
587 * which is the basic libata structure representing a single
588 * ATA command sent to the hardware.
590 * If a command was available, fill in the SCSI-specific
591 * portions of the structure with information on the
595 * spin_lock_irqsave(host lock)
598 * Command allocated, or %NULL if none available.
600 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
601 struct scsi_cmnd *cmd,
602 void (*done)(struct scsi_cmnd *))
604 struct ata_queued_cmd *qc;
606 qc = ata_qc_new_init(dev);
611 qc->sg = scsi_sglist(cmd);
612 qc->n_elem = scsi_sg_count(cmd);
614 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
621 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
623 struct scsi_cmnd *scmd = qc->scsicmd;
625 qc->extrabytes = scmd->request->extra_len;
626 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
630 * ata_dump_status - user friendly display of error info
631 * @id: id of the port in question
632 * @tf: ptr to filled out taskfile
634 * Decode and dump the ATA error/status registers for the user so
635 * that they have some idea what really happened at the non
636 * make-believe layer.
639 * inherited from caller
641 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
643 u8 stat = tf->command, err = tf->feature;
645 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
646 if (stat & ATA_BUSY) {
647 printk("Busy }\n"); /* Data is not valid in this case */
649 if (stat & 0x40) printk("DriveReady ");
650 if (stat & 0x20) printk("DeviceFault ");
651 if (stat & 0x10) printk("SeekComplete ");
652 if (stat & 0x08) printk("DataRequest ");
653 if (stat & 0x04) printk("CorrectedError ");
654 if (stat & 0x02) printk("Index ");
655 if (stat & 0x01) printk("Error ");
659 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
660 if (err & 0x04) printk("DriveStatusError ");
662 if (err & 0x04) printk("BadCRC ");
663 else printk("Sector ");
665 if (err & 0x40) printk("UncorrectableError ");
666 if (err & 0x10) printk("SectorIdNotFound ");
667 if (err & 0x02) printk("TrackZeroNotFound ");
668 if (err & 0x01) printk("AddrMarkNotFound ");
675 * ata_to_sense_error - convert ATA error to SCSI error
676 * @id: ATA device number
677 * @drv_stat: value contained in ATA status register
678 * @drv_err: value contained in ATA error register
679 * @sk: the sense key we'll fill out
680 * @asc: the additional sense code we'll fill out
681 * @ascq: the additional sense code qualifier we'll fill out
682 * @verbose: be verbose
684 * Converts an ATA error into a SCSI error. Fill out pointers to
685 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
686 * format sense blocks.
689 * spin_lock_irqsave(host lock)
691 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
692 u8 *asc, u8 *ascq, int verbose)
696 /* Based on the 3ware driver translation table */
697 static const unsigned char sense_table[][4] = {
699 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
701 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
703 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
704 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
705 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
706 /* MC|ID|ABRT|TRK0|MARK */
707 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
709 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
710 /* Bad address mark */
711 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
713 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
715 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
716 /* Media change request */
717 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
719 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
721 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
723 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
724 /* BBD - block marked bad */
725 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
726 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
728 static const unsigned char stat_table[][4] = {
729 /* Must be first because BUSY means no other bits valid */
730 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
731 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
732 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
733 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
734 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
738 * Is this an error we can process/parse
740 if (drv_stat & ATA_BUSY) {
741 drv_err = 0; /* Ignore the err bits, they're invalid */
745 /* Look for drv_err */
746 for (i = 0; sense_table[i][0] != 0xFF; i++) {
747 /* Look for best matches first */
748 if ((sense_table[i][0] & drv_err) ==
750 *sk = sense_table[i][1];
751 *asc = sense_table[i][2];
752 *ascq = sense_table[i][3];
756 /* No immediate match */
758 printk(KERN_WARNING "ata%u: no sense translation for "
759 "error 0x%02x\n", id, drv_err);
762 /* Fall back to interpreting status bits */
763 for (i = 0; stat_table[i][0] != 0xFF; i++) {
764 if (stat_table[i][0] & drv_stat) {
765 *sk = stat_table[i][1];
766 *asc = stat_table[i][2];
767 *ascq = stat_table[i][3];
771 /* No error? Undecoded? */
773 printk(KERN_WARNING "ata%u: no sense translation for "
774 "status: 0x%02x\n", id, drv_stat);
776 /* We need a sensible error return here, which is tricky, and one
777 that won't cause people to do things like return a disk wrongly */
778 *sk = ABORTED_COMMAND;
784 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
785 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
786 id, drv_stat, drv_err, *sk, *asc, *ascq);
791 * ata_gen_passthru_sense - Generate check condition sense block.
792 * @qc: Command that completed.
794 * This function is specific to the ATA descriptor format sense
795 * block specified for the ATA pass through commands. Regardless
796 * of whether the command errored or not, return a sense
797 * block. Copy all controller registers into the sense
798 * block. Clear sense key, ASC & ASCQ if there is no error.
803 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
805 struct scsi_cmnd *cmd = qc->scsicmd;
806 struct ata_taskfile *tf = &qc->result_tf;
807 unsigned char *sb = cmd->sense_buffer;
808 unsigned char *desc = sb + 8;
809 int verbose = qc->ap->ops->error_handler == NULL;
811 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
813 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
816 * Use ata_to_sense_error() to map status register bits
817 * onto sense key, asc & ascq.
820 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
821 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
822 &sb[1], &sb[2], &sb[3], verbose);
827 * Sense data is current and format is descriptor.
833 /* set length of additional sense data */
838 * Copy registers into sense buffer.
841 desc[3] = tf->feature; /* == error reg */
846 desc[12] = tf->device;
847 desc[13] = tf->command; /* == status reg */
850 * Fill in Extend bit, and the high order bytes
853 if (tf->flags & ATA_TFLAG_LBA48) {
855 desc[4] = tf->hob_nsect;
856 desc[6] = tf->hob_lbal;
857 desc[8] = tf->hob_lbam;
858 desc[10] = tf->hob_lbah;
863 * ata_gen_ata_sense - generate a SCSI fixed sense block
864 * @qc: Command that we are erroring out
866 * Generate sense block for a failed ATA command @qc. Descriptor
867 * format is used to accomodate LBA48 block address.
872 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
874 struct ata_device *dev = qc->dev;
875 struct scsi_cmnd *cmd = qc->scsicmd;
876 struct ata_taskfile *tf = &qc->result_tf;
877 unsigned char *sb = cmd->sense_buffer;
878 unsigned char *desc = sb + 8;
879 int verbose = qc->ap->ops->error_handler == NULL;
882 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
884 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
886 /* sense data is current and format is descriptor */
889 /* Use ata_to_sense_error() to map status register bits
890 * onto sense key, asc & ascq.
893 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
894 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
895 &sb[1], &sb[2], &sb[3], verbose);
899 block = ata_tf_read_block(&qc->result_tf, dev);
901 /* information sense data descriptor */
906 desc[2] |= 0x80; /* valid */
907 desc[6] = block >> 40;
908 desc[7] = block >> 32;
909 desc[8] = block >> 24;
910 desc[9] = block >> 16;
911 desc[10] = block >> 8;
915 static void ata_scsi_sdev_config(struct scsi_device *sdev)
917 sdev->use_10_for_rw = 1;
918 sdev->use_10_for_ms = 1;
920 /* Schedule policy is determined by ->qc_defer() callback and
921 * it needs to see every deferred qc. Set dev_blocked to 1 to
922 * prevent SCSI midlayer from automatically deferring
925 sdev->max_device_blocked = 1;
929 * atapi_drain_needed - Check whether data transfer may overflow
930 * @rq: request to be checked
932 * ATAPI commands which transfer variable length data to host
933 * might overflow due to application error or hardare bug. This
934 * function checks whether overflow should be drained and ignored
941 * 1 if ; otherwise, 0.
943 static int atapi_drain_needed(struct request *rq)
945 if (likely(!blk_pc_request(rq)))
948 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
951 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
954 static int ata_scsi_dev_config(struct scsi_device *sdev,
955 struct ata_device *dev)
957 /* configure max sectors */
958 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
960 if (dev->class == ATA_DEV_ATAPI) {
961 struct request_queue *q = sdev->request_queue;
964 /* set the min alignment and padding */
965 blk_queue_update_dma_alignment(sdev->request_queue,
967 blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1);
969 /* configure draining */
970 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
972 ata_dev_printk(dev, KERN_ERR,
973 "drain buffer allocation failed\n");
977 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
979 /* ATA devices must be sector aligned */
980 blk_queue_update_dma_alignment(sdev->request_queue,
982 sdev->manage_start_stop = 1;
985 if (dev->flags & ATA_DFLAG_AN)
986 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
988 if (dev->flags & ATA_DFLAG_NCQ) {
991 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
992 depth = min(ATA_MAX_QUEUE - 1, depth);
993 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1000 * ata_scsi_slave_config - Set SCSI device attributes
1001 * @sdev: SCSI device to examine
1003 * This is called before we actually start reading
1004 * and writing to the device, to configure certain
1005 * SCSI mid-layer behaviors.
1008 * Defined by SCSI layer. We don't really care.
1011 int ata_scsi_slave_config(struct scsi_device *sdev)
1013 struct ata_port *ap = ata_shost_to_port(sdev->host);
1014 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1017 ata_scsi_sdev_config(sdev);
1020 rc = ata_scsi_dev_config(sdev, dev);
1026 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1027 * @sdev: SCSI device to be destroyed
1029 * @sdev is about to be destroyed for hot/warm unplugging. If
1030 * this unplugging was initiated by libata as indicated by NULL
1031 * dev->sdev, this function doesn't have to do anything.
1032 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1033 * Clear dev->sdev, schedule the device for ATA detach and invoke
1037 * Defined by SCSI layer. We don't really care.
1039 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1041 struct ata_port *ap = ata_shost_to_port(sdev->host);
1042 struct request_queue *q = sdev->request_queue;
1043 unsigned long flags;
1044 struct ata_device *dev;
1046 if (!ap->ops->error_handler)
1049 spin_lock_irqsave(ap->lock, flags);
1050 dev = __ata_scsi_find_dev(ap, sdev);
1051 if (dev && dev->sdev) {
1052 /* SCSI device already in CANCEL state, no need to offline it */
1054 dev->flags |= ATA_DFLAG_DETACH;
1055 ata_port_schedule_eh(ap);
1057 spin_unlock_irqrestore(ap->lock, flags);
1059 kfree(q->dma_drain_buffer);
1060 q->dma_drain_buffer = NULL;
1061 q->dma_drain_size = 0;
1065 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1066 * @sdev: SCSI device to configure queue depth for
1067 * @queue_depth: new queue depth
1069 * This is libata standard hostt->change_queue_depth callback.
1070 * SCSI will call into this callback when user tries to set queue
1074 * SCSI layer (we don't care)
1077 * Newly configured queue depth.
1079 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1081 struct ata_port *ap = ata_shost_to_port(sdev->host);
1082 struct ata_device *dev;
1083 unsigned long flags;
1085 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1086 return sdev->queue_depth;
1088 dev = ata_scsi_find_dev(ap, sdev);
1089 if (!dev || !ata_dev_enabled(dev))
1090 return sdev->queue_depth;
1093 spin_lock_irqsave(ap->lock, flags);
1094 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1095 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1096 dev->flags |= ATA_DFLAG_NCQ_OFF;
1099 spin_unlock_irqrestore(ap->lock, flags);
1101 /* limit and apply queue depth */
1102 queue_depth = min(queue_depth, sdev->host->can_queue);
1103 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1104 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1106 if (sdev->queue_depth == queue_depth)
1109 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1113 /* XXX: for spindown warning */
1114 static void ata_delayed_done_timerfn(unsigned long arg)
1116 struct scsi_cmnd *scmd = (void *)arg;
1118 scmd->scsi_done(scmd);
1121 /* XXX: for spindown warning */
1122 static void ata_delayed_done(struct scsi_cmnd *scmd)
1124 static struct timer_list timer;
1126 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1127 mod_timer(&timer, jiffies + 5 * HZ);
1131 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1132 * @qc: Storage for translated ATA taskfile
1134 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1135 * (to start). Perhaps these commands should be preceded by
1136 * CHECK POWER MODE to see what power mode the device is already in.
1137 * [See SAT revision 5 at www.t10.org]
1140 * spin_lock_irqsave(host lock)
1143 * Zero on success, non-zero on error.
1145 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1147 struct scsi_cmnd *scmd = qc->scsicmd;
1148 struct ata_taskfile *tf = &qc->tf;
1149 const u8 *cdb = scmd->cmnd;
1151 if (scmd->cmd_len < 5)
1154 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1155 tf->protocol = ATA_PROT_NODATA;
1157 ; /* ignore IMMED bit, violates sat-r05 */
1160 goto invalid_fld; /* LOEJ bit set not supported */
1161 if (((cdb[4] >> 4) & 0xf) != 0)
1162 goto invalid_fld; /* power conditions not supported */
1165 tf->nsect = 1; /* 1 sector, lba=0 */
1167 if (qc->dev->flags & ATA_DFLAG_LBA) {
1168 tf->flags |= ATA_TFLAG_LBA;
1173 tf->device |= ATA_LBA;
1176 tf->lbal = 0x1; /* sect */
1177 tf->lbam = 0x0; /* cyl low */
1178 tf->lbah = 0x0; /* cyl high */
1181 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1183 /* XXX: This is for backward compatibility, will be
1184 * removed. Read Documentation/feature-removal-schedule.txt
1187 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1188 (system_state == SYSTEM_HALT ||
1189 system_state == SYSTEM_POWER_OFF)) {
1190 static unsigned long warned;
1192 if (!test_and_set_bit(0, &warned)) {
1193 ata_dev_printk(qc->dev, KERN_WARNING,
1194 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1195 "UPDATE SHUTDOWN UTILITY\n");
1196 ata_dev_printk(qc->dev, KERN_WARNING,
1197 "For more info, visit "
1198 "http://linux-ata.org/shutdown.html\n");
1200 /* ->scsi_done is not used, use it for
1201 * delayed completion.
1203 scmd->scsi_done = qc->scsidone;
1204 qc->scsidone = ata_delayed_done;
1206 scmd->result = SAM_STAT_GOOD;
1210 /* Issue ATA STANDBY IMMEDIATE command */
1211 tf->command = ATA_CMD_STANDBYNOW1;
1215 * Standby and Idle condition timers could be implemented but that
1216 * would require libata to implement the Power condition mode page
1217 * and allow the user to change it. Changing mode pages requires
1218 * MODE SELECT to be implemented.
1224 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1225 /* "Invalid field in cbd" */
1231 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1232 * @qc: Storage for translated ATA taskfile
1234 * Sets up an ATA taskfile to issue FLUSH CACHE or
1238 * spin_lock_irqsave(host lock)
1241 * Zero on success, non-zero on error.
1243 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1245 struct ata_taskfile *tf = &qc->tf;
1247 tf->flags |= ATA_TFLAG_DEVICE;
1248 tf->protocol = ATA_PROT_NODATA;
1250 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1251 tf->command = ATA_CMD_FLUSH_EXT;
1253 tf->command = ATA_CMD_FLUSH;
1255 /* flush is critical for IO integrity, consider it an IO command */
1256 qc->flags |= ATA_QCFLAG_IO;
1262 * scsi_6_lba_len - Get LBA and transfer length
1263 * @cdb: SCSI command to translate
1265 * Calculate LBA and transfer length for 6-byte commands.
1269 * @plen: the transfer length
1271 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1276 VPRINTK("six-byte command\n");
1278 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1279 lba |= ((u64)cdb[2]) << 8;
1280 lba |= ((u64)cdb[3]);
1289 * scsi_10_lba_len - Get LBA and transfer length
1290 * @cdb: SCSI command to translate
1292 * Calculate LBA and transfer length for 10-byte commands.
1296 * @plen: the transfer length
1298 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1303 VPRINTK("ten-byte command\n");
1305 lba |= ((u64)cdb[2]) << 24;
1306 lba |= ((u64)cdb[3]) << 16;
1307 lba |= ((u64)cdb[4]) << 8;
1308 lba |= ((u64)cdb[5]);
1310 len |= ((u32)cdb[7]) << 8;
1311 len |= ((u32)cdb[8]);
1318 * scsi_16_lba_len - Get LBA and transfer length
1319 * @cdb: SCSI command to translate
1321 * Calculate LBA and transfer length for 16-byte commands.
1325 * @plen: the transfer length
1327 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1332 VPRINTK("sixteen-byte command\n");
1334 lba |= ((u64)cdb[2]) << 56;
1335 lba |= ((u64)cdb[3]) << 48;
1336 lba |= ((u64)cdb[4]) << 40;
1337 lba |= ((u64)cdb[5]) << 32;
1338 lba |= ((u64)cdb[6]) << 24;
1339 lba |= ((u64)cdb[7]) << 16;
1340 lba |= ((u64)cdb[8]) << 8;
1341 lba |= ((u64)cdb[9]);
1343 len |= ((u32)cdb[10]) << 24;
1344 len |= ((u32)cdb[11]) << 16;
1345 len |= ((u32)cdb[12]) << 8;
1346 len |= ((u32)cdb[13]);
1353 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1354 * @qc: Storage for translated ATA taskfile
1356 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1359 * spin_lock_irqsave(host lock)
1362 * Zero on success, non-zero on error.
1364 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1366 struct scsi_cmnd *scmd = qc->scsicmd;
1367 struct ata_taskfile *tf = &qc->tf;
1368 struct ata_device *dev = qc->dev;
1369 u64 dev_sectors = qc->dev->n_sectors;
1370 const u8 *cdb = scmd->cmnd;
1374 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1375 tf->protocol = ATA_PROT_NODATA;
1377 if (cdb[0] == VERIFY) {
1378 if (scmd->cmd_len < 10)
1380 scsi_10_lba_len(cdb, &block, &n_block);
1381 } else if (cdb[0] == VERIFY_16) {
1382 if (scmd->cmd_len < 16)
1384 scsi_16_lba_len(cdb, &block, &n_block);
1390 if (block >= dev_sectors)
1392 if ((block + n_block) > dev_sectors)
1395 if (dev->flags & ATA_DFLAG_LBA) {
1396 tf->flags |= ATA_TFLAG_LBA;
1398 if (lba_28_ok(block, n_block)) {
1400 tf->command = ATA_CMD_VERIFY;
1401 tf->device |= (block >> 24) & 0xf;
1402 } else if (lba_48_ok(block, n_block)) {
1403 if (!(dev->flags & ATA_DFLAG_LBA48))
1407 tf->flags |= ATA_TFLAG_LBA48;
1408 tf->command = ATA_CMD_VERIFY_EXT;
1410 tf->hob_nsect = (n_block >> 8) & 0xff;
1412 tf->hob_lbah = (block >> 40) & 0xff;
1413 tf->hob_lbam = (block >> 32) & 0xff;
1414 tf->hob_lbal = (block >> 24) & 0xff;
1416 /* request too large even for LBA48 */
1419 tf->nsect = n_block & 0xff;
1421 tf->lbah = (block >> 16) & 0xff;
1422 tf->lbam = (block >> 8) & 0xff;
1423 tf->lbal = block & 0xff;
1425 tf->device |= ATA_LBA;
1428 u32 sect, head, cyl, track;
1430 if (!lba_28_ok(block, n_block))
1433 /* Convert LBA to CHS */
1434 track = (u32)block / dev->sectors;
1435 cyl = track / dev->heads;
1436 head = track % dev->heads;
1437 sect = (u32)block % dev->sectors + 1;
1439 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1440 (u32)block, track, cyl, head, sect);
1442 /* Check whether the converted CHS can fit.
1446 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1449 tf->command = ATA_CMD_VERIFY;
1450 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1453 tf->lbah = cyl >> 8;
1460 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1461 /* "Invalid field in cbd" */
1465 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1466 /* "Logical Block Address out of range" */
1470 scmd->result = SAM_STAT_GOOD;
1475 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1476 * @qc: Storage for translated ATA taskfile
1478 * Converts any of six SCSI read/write commands into the
1479 * ATA counterpart, including starting sector (LBA),
1480 * sector count, and taking into account the device's LBA48
1483 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1484 * %WRITE_16 are currently supported.
1487 * spin_lock_irqsave(host lock)
1490 * Zero on success, non-zero on error.
1492 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1494 struct scsi_cmnd *scmd = qc->scsicmd;
1495 const u8 *cdb = scmd->cmnd;
1496 unsigned int tf_flags = 0;
1501 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1502 tf_flags |= ATA_TFLAG_WRITE;
1504 /* Calculate the SCSI LBA, transfer length and FUA. */
1508 if (unlikely(scmd->cmd_len < 10))
1510 scsi_10_lba_len(cdb, &block, &n_block);
1511 if (unlikely(cdb[1] & (1 << 3)))
1512 tf_flags |= ATA_TFLAG_FUA;
1516 if (unlikely(scmd->cmd_len < 6))
1518 scsi_6_lba_len(cdb, &block, &n_block);
1520 /* for 6-byte r/w commands, transfer length 0
1521 * means 256 blocks of data, not 0 block.
1528 if (unlikely(scmd->cmd_len < 16))
1530 scsi_16_lba_len(cdb, &block, &n_block);
1531 if (unlikely(cdb[1] & (1 << 3)))
1532 tf_flags |= ATA_TFLAG_FUA;
1535 DPRINTK("no-byte command\n");
1539 /* Check and compose ATA command */
1541 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1542 * length 0 means transfer 0 block of data.
1543 * However, for ATA R/W commands, sector count 0 means
1544 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1546 * WARNING: one or two older ATA drives treat 0 as 0...
1550 qc->flags |= ATA_QCFLAG_IO;
1551 qc->nbytes = n_block * ATA_SECT_SIZE;
1553 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1555 if (likely(rc == 0))
1560 /* treat all other errors as -EINVAL, fall through */
1562 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1563 /* "Invalid field in cbd" */
1567 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1568 /* "Logical Block Address out of range" */
1572 scmd->result = SAM_STAT_GOOD;
1576 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1578 struct ata_port *ap = qc->ap;
1579 struct scsi_cmnd *cmd = qc->scsicmd;
1580 u8 *cdb = cmd->cmnd;
1581 int need_sense = (qc->err_mask != 0);
1583 /* For ATA pass thru (SAT) commands, generate a sense block if
1584 * user mandated it or if there's an error. Note that if we
1585 * generate because the user forced us to, a check condition
1586 * is generated and the ATA register values are returned
1587 * whether the command completed successfully or not. If there
1588 * was no error, SK, ASC and ASCQ will all be zero.
1590 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1591 ((cdb[2] & 0x20) || need_sense)) {
1592 ata_gen_passthru_sense(qc);
1595 cmd->result = SAM_STAT_GOOD;
1597 /* TODO: decide which descriptor format to use
1598 * for 48b LBA devices and call that here
1599 * instead of the fixed desc, which is only
1600 * good for smaller LBA (and maybe CHS?)
1603 ata_gen_ata_sense(qc);
1607 /* XXX: track spindown state for spindown skipping and warning */
1608 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1609 qc->tf.command == ATA_CMD_STANDBYNOW1))
1610 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1611 else if (likely(system_state != SYSTEM_HALT &&
1612 system_state != SYSTEM_POWER_OFF))
1613 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1615 if (need_sense && !ap->ops->error_handler)
1616 ata_dump_status(ap->print_id, &qc->result_tf);
1624 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1625 * @dev: ATA device to which the command is addressed
1626 * @cmd: SCSI command to execute
1627 * @done: SCSI command completion function
1628 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1630 * Our ->queuecommand() function has decided that the SCSI
1631 * command issued can be directly translated into an ATA
1632 * command, rather than handled internally.
1634 * This function sets up an ata_queued_cmd structure for the
1635 * SCSI command, and sends that ata_queued_cmd to the hardware.
1637 * The xlat_func argument (actor) returns 0 if ready to execute
1638 * ATA command, else 1 to finish translation. If 1 is returned
1639 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1640 * to be set reflecting an error condition or clean (early)
1644 * spin_lock_irqsave(host lock)
1647 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1648 * needs to be deferred.
1650 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1651 void (*done)(struct scsi_cmnd *),
1652 ata_xlat_func_t xlat_func)
1654 struct ata_port *ap = dev->link->ap;
1655 struct ata_queued_cmd *qc;
1660 qc = ata_scsi_qc_new(dev, cmd, done);
1664 /* data is present; dma-map it */
1665 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1666 cmd->sc_data_direction == DMA_TO_DEVICE) {
1667 if (unlikely(scsi_bufflen(cmd) < 1)) {
1668 ata_dev_printk(dev, KERN_WARNING,
1669 "WARNING: zero len r/w req\n");
1673 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1675 qc->dma_dir = cmd->sc_data_direction;
1678 qc->complete_fn = ata_scsi_qc_complete;
1683 if (ap->ops->qc_defer) {
1684 if ((rc = ap->ops->qc_defer(qc)))
1688 /* select device, send command to hardware */
1697 DPRINTK("EXIT - early finish (good or error)\n");
1702 cmd->result = (DID_ERROR << 16);
1705 DPRINTK("EXIT - internal\n");
1710 DPRINTK("EXIT - defer\n");
1711 if (rc == ATA_DEFER_LINK)
1712 return SCSI_MLQUEUE_DEVICE_BUSY;
1714 return SCSI_MLQUEUE_HOST_BUSY;
1718 * ata_scsi_rbuf_get - Map response buffer.
1719 * @cmd: SCSI command containing buffer to be mapped.
1720 * @flags: unsigned long variable to store irq enable status
1721 * @copy_in: copy in from user buffer
1723 * Prepare buffer for simulated SCSI commands.
1726 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1729 * Pointer to response buffer.
1731 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1732 unsigned long *flags)
1734 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1736 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1738 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1739 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1740 return ata_scsi_rbuf;
1744 * ata_scsi_rbuf_put - Unmap response buffer.
1745 * @cmd: SCSI command containing buffer to be unmapped.
1746 * @copy_out: copy out result
1747 * @flags: @flags passed to ata_scsi_rbuf_get()
1749 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1750 * @copy_back is true.
1753 * Unlocks ata_scsi_rbuf_lock.
1755 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1756 unsigned long *flags)
1759 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1760 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1761 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1765 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1766 * @args: device IDENTIFY data / SCSI command of interest.
1767 * @actor: Callback hook for desired SCSI command simulator
1769 * Takes care of the hard work of simulating a SCSI command...
1770 * Mapping the response buffer, calling the command's handler,
1771 * and handling the handler's return value. This return value
1772 * indicates whether the handler wishes the SCSI command to be
1773 * completed successfully (0), or not (in which case cmd->result
1774 * and sense buffer are assumed to be set).
1777 * spin_lock_irqsave(host lock)
1779 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1780 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1784 struct scsi_cmnd *cmd = args->cmd;
1785 unsigned long flags;
1787 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1788 rc = actor(args, rbuf);
1789 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1792 cmd->result = SAM_STAT_GOOD;
1797 * ata_scsiop_inq_std - Simulate INQUIRY command
1798 * @args: device IDENTIFY data / SCSI command of interest.
1799 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1801 * Returns standard device identification data associated
1802 * with non-VPD INQUIRY command output.
1805 * spin_lock_irqsave(host lock)
1807 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1809 const u8 versions[] = {
1810 0x60, /* SAM-3 (no version claimed) */
1813 0x20, /* SBC-2 (no version claimed) */
1816 0x60 /* SPC-3 (no version claimed) */
1821 0x5, /* claim SPC-3 version compatibility */
1828 /* set scsi removeable (RMB) bit per ata bit */
1829 if (ata_id_removeable(args->id))
1832 memcpy(rbuf, hdr, sizeof(hdr));
1833 memcpy(&rbuf[8], "ATA ", 8);
1834 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1835 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1837 if (rbuf[32] == 0 || rbuf[32] == ' ')
1838 memcpy(&rbuf[32], "n/a ", 4);
1840 memcpy(rbuf + 59, versions, sizeof(versions));
1846 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1847 * @args: device IDENTIFY data / SCSI command of interest.
1848 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1850 * Returns list of inquiry VPD pages available.
1853 * spin_lock_irqsave(host lock)
1855 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1857 const u8 pages[] = {
1858 0x00, /* page 0x00, this page */
1859 0x80, /* page 0x80, unit serial no page */
1860 0x83, /* page 0x83, device ident page */
1861 0x89, /* page 0x89, ata info page */
1862 0xb1, /* page 0xb1, block device characteristics page */
1865 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1866 memcpy(rbuf + 4, pages, sizeof(pages));
1871 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1872 * @args: device IDENTIFY data / SCSI command of interest.
1873 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1875 * Returns ATA device serial number.
1878 * spin_lock_irqsave(host lock)
1880 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1884 0x80, /* this page code */
1886 ATA_ID_SERNO_LEN, /* page len */
1889 memcpy(rbuf, hdr, sizeof(hdr));
1890 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1891 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1896 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1897 * @args: device IDENTIFY data / SCSI command of interest.
1898 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1900 * Yields two logical unit device identification designators:
1901 * - vendor specific ASCII containing the ATA serial number
1902 * - SAT defined "t10 vendor id based" containing ASCII vendor
1903 * name ("ATA "), model and serial numbers.
1906 * spin_lock_irqsave(host lock)
1908 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1910 const int sat_model_serial_desc_len = 68;
1913 rbuf[1] = 0x83; /* this page code */
1916 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1918 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1920 ata_id_string(args->id, (unsigned char *) rbuf + num,
1921 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1922 num += ATA_ID_SERNO_LEN;
1924 /* SAT defined lu model and serial numbers descriptor */
1925 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1928 rbuf[num + 3] = sat_model_serial_desc_len;
1930 memcpy(rbuf + num, "ATA ", 8);
1932 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1934 num += ATA_ID_PROD_LEN;
1935 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1937 num += ATA_ID_SERNO_LEN;
1939 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1944 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1945 * @args: device IDENTIFY data / SCSI command of interest.
1946 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1948 * Yields SAT-specified ATA VPD page.
1951 * spin_lock_irqsave(host lock)
1953 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
1955 struct ata_taskfile tf;
1957 memset(&tf, 0, sizeof(tf));
1959 rbuf[1] = 0x89; /* our page code */
1960 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1961 rbuf[3] = (0x238 & 0xff);
1963 memcpy(&rbuf[8], "linux ", 8);
1964 memcpy(&rbuf[16], "libata ", 16);
1965 memcpy(&rbuf[32], DRV_VERSION, 4);
1966 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1968 /* we don't store the ATA device signature, so we fake it */
1970 tf.command = ATA_DRDY; /* really, this is Status reg */
1974 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
1975 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1977 rbuf[56] = ATA_CMD_ID_ATA;
1979 memcpy(&rbuf[60], &args->id[0], 512);
1983 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
1987 if (ata_id_major_version(args->id) > 7) {
1988 rbuf[4] = args->id[217] >> 8;
1989 rbuf[5] = args->id[217];
1990 rbuf[7] = args->id[168] & 0xf;
1997 * ata_scsiop_noop - Command handler that simply returns success.
1998 * @args: device IDENTIFY data / SCSI command of interest.
1999 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2001 * No operation. Simply returns success to caller, to indicate
2002 * that the caller should successfully complete this SCSI command.
2005 * spin_lock_irqsave(host lock)
2007 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2014 * ata_msense_caching - Simulate MODE SENSE caching info page
2015 * @id: device IDENTIFY data
2016 * @buf: output buffer
2018 * Generate a caching info page, which conditionally indicates
2019 * write caching to the SCSI layer, depending on device
2025 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2027 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2028 if (ata_id_wcache_enabled(id))
2029 buf[2] |= (1 << 2); /* write cache enable */
2030 if (!ata_id_rahead_enabled(id))
2031 buf[12] |= (1 << 5); /* disable read ahead */
2032 return sizeof(def_cache_mpage);
2036 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2037 * @buf: output buffer
2039 * Generate a generic MODE SENSE control mode page.
2044 static unsigned int ata_msense_ctl_mode(u8 *buf)
2046 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2047 return sizeof(def_control_mpage);
2051 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2052 * @buf: output buffer
2054 * Generate a generic MODE SENSE r/w error recovery page.
2059 static unsigned int ata_msense_rw_recovery(u8 *buf)
2061 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2062 return sizeof(def_rw_recovery_mpage);
2066 * We can turn this into a real blacklist if it's needed, for now just
2067 * blacklist any Maxtor BANC1G10 revision firmware
2069 static int ata_dev_supports_fua(u16 *id)
2071 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2075 if (!ata_id_has_fua(id))
2078 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2079 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2081 if (strcmp(model, "Maxtor"))
2083 if (strcmp(fw, "BANC1G10"))
2086 return 0; /* blacklisted */
2090 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2091 * @args: device IDENTIFY data / SCSI command of interest.
2092 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2094 * Simulate MODE SENSE commands. Assume this is invoked for direct
2095 * access devices (e.g. disks) only. There should be no block
2096 * descriptor for other device types.
2099 * spin_lock_irqsave(host lock)
2101 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2103 struct ata_device *dev = args->dev;
2104 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2105 const u8 sat_blk_desc[] = {
2106 0, 0, 0, 0, /* number of blocks: sat unspecified */
2108 0, 0x2, 0x0 /* block length: 512 bytes */
2111 unsigned int ebd, page_control, six_byte;
2116 six_byte = (scsicmd[0] == MODE_SENSE);
2117 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2119 * LLBA bit in msense(10) ignored (compliant)
2122 page_control = scsicmd[2] >> 6;
2123 switch (page_control) {
2124 case 0: /* current */
2125 break; /* supported */
2127 goto saving_not_supp;
2128 case 1: /* changeable */
2129 case 2: /* defaults */
2135 p += 4 + (ebd ? 8 : 0);
2137 p += 8 + (ebd ? 8 : 0);
2139 pg = scsicmd[2] & 0x3f;
2142 * No mode subpages supported (yet) but asking for _all_
2143 * subpages may be valid
2145 if (spg && (spg != ALL_SUB_MPAGES))
2149 case RW_RECOVERY_MPAGE:
2150 p += ata_msense_rw_recovery(p);
2154 p += ata_msense_caching(args->id, p);
2158 p += ata_msense_ctl_mode(p);
2162 p += ata_msense_rw_recovery(p);
2163 p += ata_msense_caching(args->id, p);
2164 p += ata_msense_ctl_mode(p);
2167 default: /* invalid page code */
2172 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2173 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2177 rbuf[0] = p - rbuf - 1;
2180 rbuf[3] = sizeof(sat_blk_desc);
2181 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2184 unsigned int output_len = p - rbuf - 2;
2186 rbuf[0] = output_len >> 8;
2187 rbuf[1] = output_len;
2190 rbuf[7] = sizeof(sat_blk_desc);
2191 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2197 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2198 /* "Invalid field in cbd" */
2202 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2203 /* "Saving parameters not supported" */
2208 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2209 * @args: device IDENTIFY data / SCSI command of interest.
2210 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2212 * Simulate READ CAPACITY commands.
2217 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2219 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2223 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2224 if (last_lba >= 0xffffffffULL)
2225 last_lba = 0xffffffff;
2227 /* sector count, 32-bit */
2228 rbuf[0] = last_lba >> (8 * 3);
2229 rbuf[1] = last_lba >> (8 * 2);
2230 rbuf[2] = last_lba >> (8 * 1);
2234 rbuf[6] = ATA_SECT_SIZE >> 8;
2235 rbuf[7] = ATA_SECT_SIZE & 0xff;
2237 /* sector count, 64-bit */
2238 rbuf[0] = last_lba >> (8 * 7);
2239 rbuf[1] = last_lba >> (8 * 6);
2240 rbuf[2] = last_lba >> (8 * 5);
2241 rbuf[3] = last_lba >> (8 * 4);
2242 rbuf[4] = last_lba >> (8 * 3);
2243 rbuf[5] = last_lba >> (8 * 2);
2244 rbuf[6] = last_lba >> (8 * 1);
2248 rbuf[10] = ATA_SECT_SIZE >> 8;
2249 rbuf[11] = ATA_SECT_SIZE & 0xff;
2256 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2257 * @args: device IDENTIFY data / SCSI command of interest.
2258 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2260 * Simulate REPORT LUNS command.
2263 * spin_lock_irqsave(host lock)
2265 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2268 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2273 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2275 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2276 /* FIXME: not quite right; we don't want the
2277 * translation of taskfile registers into
2278 * a sense descriptors, since that's only
2279 * correct for ATA, not ATAPI
2281 ata_gen_passthru_sense(qc);
2284 qc->scsidone(qc->scsicmd);
2288 /* is it pointless to prefer PIO for "safety reasons"? */
2289 static inline int ata_pio_use_silly(struct ata_port *ap)
2291 return (ap->flags & ATA_FLAG_PIO_DMA);
2294 static void atapi_request_sense(struct ata_queued_cmd *qc)
2296 struct ata_port *ap = qc->ap;
2297 struct scsi_cmnd *cmd = qc->scsicmd;
2299 DPRINTK("ATAPI request sense\n");
2301 /* FIXME: is this needed? */
2302 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2304 #ifdef CONFIG_ATA_SFF
2305 if (ap->ops->sff_tf_read)
2306 ap->ops->sff_tf_read(ap, &qc->tf);
2309 /* fill these in, for the case where they are -not- overwritten */
2310 cmd->sense_buffer[0] = 0x70;
2311 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2315 /* setup sg table and init transfer direction */
2316 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2317 ata_sg_init(qc, &qc->sgent, 1);
2318 qc->dma_dir = DMA_FROM_DEVICE;
2320 memset(&qc->cdb, 0, qc->dev->cdb_len);
2321 qc->cdb[0] = REQUEST_SENSE;
2322 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2324 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2325 qc->tf.command = ATA_CMD_PACKET;
2327 if (ata_pio_use_silly(ap)) {
2328 qc->tf.protocol = ATAPI_PROT_DMA;
2329 qc->tf.feature |= ATAPI_PKT_DMA;
2331 qc->tf.protocol = ATAPI_PROT_PIO;
2332 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2335 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2337 qc->complete_fn = atapi_sense_complete;
2344 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2346 struct scsi_cmnd *cmd = qc->scsicmd;
2347 unsigned int err_mask = qc->err_mask;
2349 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2351 /* handle completion from new EH */
2352 if (unlikely(qc->ap->ops->error_handler &&
2353 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2355 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2356 /* FIXME: not quite right; we don't want the
2357 * translation of taskfile registers into a
2358 * sense descriptors, since that's only
2359 * correct for ATA, not ATAPI
2361 ata_gen_passthru_sense(qc);
2364 /* SCSI EH automatically locks door if sdev->locked is
2365 * set. Sometimes door lock request continues to
2366 * fail, for example, when no media is present. This
2367 * creates a loop - SCSI EH issues door lock which
2368 * fails and gets invoked again to acquire sense data
2369 * for the failed command.
2371 * If door lock fails, always clear sdev->locked to
2372 * avoid this infinite loop.
2374 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2375 qc->dev->sdev->locked = 0;
2377 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2383 /* successful completion or old EH failure path */
2384 if (unlikely(err_mask & AC_ERR_DEV)) {
2385 cmd->result = SAM_STAT_CHECK_CONDITION;
2386 atapi_request_sense(qc);
2388 } else if (unlikely(err_mask)) {
2389 /* FIXME: not quite right; we don't want the
2390 * translation of taskfile registers into
2391 * a sense descriptors, since that's only
2392 * correct for ATA, not ATAPI
2394 ata_gen_passthru_sense(qc);
2396 u8 *scsicmd = cmd->cmnd;
2398 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2399 unsigned long flags;
2402 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2404 /* ATAPI devices typically report zero for their SCSI version,
2405 * and sometimes deviate from the spec WRT response data
2406 * format. If SCSI version is reported as zero like normal,
2407 * then we make the following fixups: 1) Fake MMC-5 version,
2408 * to indicate to the Linux scsi midlayer this is a modern
2409 * device. 2) Ensure response data format / ATAPI information
2410 * are always correct.
2417 ata_scsi_rbuf_put(cmd, true, &flags);
2420 cmd->result = SAM_STAT_GOOD;
2427 * atapi_xlat - Initialize PACKET taskfile
2428 * @qc: command structure to be initialized
2431 * spin_lock_irqsave(host lock)
2434 * Zero on success, non-zero on failure.
2436 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2438 struct scsi_cmnd *scmd = qc->scsicmd;
2439 struct ata_device *dev = qc->dev;
2440 int nodata = (scmd->sc_data_direction == DMA_NONE);
2441 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2442 unsigned int nbytes;
2444 memset(qc->cdb, 0, dev->cdb_len);
2445 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2447 qc->complete_fn = atapi_qc_complete;
2449 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2450 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2451 qc->tf.flags |= ATA_TFLAG_WRITE;
2452 DPRINTK("direction: write\n");
2455 qc->tf.command = ATA_CMD_PACKET;
2456 ata_qc_set_pc_nbytes(qc);
2458 /* check whether ATAPI DMA is safe */
2459 if (!nodata && !using_pio && atapi_check_dma(qc))
2462 /* Some controller variants snoop this value for Packet
2463 * transfers to do state machine and FIFO management. Thus we
2464 * want to set it properly, and for DMA where it is
2465 * effectively meaningless.
2467 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2469 /* Most ATAPI devices which honor transfer chunk size don't
2470 * behave according to the spec when odd chunk size which
2471 * matches the transfer length is specified. If the number of
2472 * bytes to transfer is 2n+1. According to the spec, what
2473 * should happen is to indicate that 2n+1 is going to be
2474 * transferred and transfer 2n+2 bytes where the last byte is
2477 * In practice, this doesn't happen. ATAPI devices first
2478 * indicate and transfer 2n bytes and then indicate and
2479 * transfer 2 bytes where the last byte is padding.
2481 * This inconsistency confuses several controllers which
2482 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2483 * These controllers use actual number of transferred bytes to
2484 * update DMA poitner and transfer of 4n+2 bytes make those
2485 * controller push DMA pointer by 4n+4 bytes because SATA data
2486 * FISes are aligned to 4 bytes. This causes data corruption
2487 * and buffer overrun.
2489 * Always setting nbytes to even number solves this problem
2490 * because then ATAPI devices don't have to split data at 2n
2496 qc->tf.lbam = (nbytes & 0xFF);
2497 qc->tf.lbah = (nbytes >> 8);
2500 qc->tf.protocol = ATAPI_PROT_NODATA;
2502 qc->tf.protocol = ATAPI_PROT_PIO;
2505 qc->tf.protocol = ATAPI_PROT_DMA;
2506 qc->tf.feature |= ATAPI_PKT_DMA;
2508 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2509 (scmd->sc_data_direction != DMA_TO_DEVICE))
2510 /* some SATA bridges need us to indicate data xfer direction */
2511 qc->tf.feature |= ATAPI_DMADIR;
2515 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2516 as ATAPI tape drives don't get this right otherwise */
2520 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2522 if (!sata_pmp_attached(ap)) {
2523 if (likely(devno < ata_link_max_devices(&ap->link)))
2524 return &ap->link.device[devno];
2526 if (likely(devno < ap->nr_pmp_links))
2527 return &ap->pmp_link[devno].device[0];
2533 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2534 const struct scsi_device *scsidev)
2538 /* skip commands not addressed to targets we simulate */
2539 if (!sata_pmp_attached(ap)) {
2540 if (unlikely(scsidev->channel || scsidev->lun))
2542 devno = scsidev->id;
2544 if (unlikely(scsidev->id || scsidev->lun))
2546 devno = scsidev->channel;
2549 return ata_find_dev(ap, devno);
2553 * ata_scsi_dev_enabled - determine if device is enabled
2556 * Determine if commands should be sent to the specified device.
2559 * spin_lock_irqsave(host lock)
2562 * 0 if commands are not allowed / 1 if commands are allowed
2565 static int ata_scsi_dev_enabled(struct ata_device *dev)
2567 if (unlikely(!ata_dev_enabled(dev)))
2570 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2571 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2572 ata_dev_printk(dev, KERN_WARNING,
2573 "WARNING: ATAPI is %s, device ignored.\n",
2574 atapi_enabled ? "not supported with this driver" : "disabled");
2583 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2584 * @ap: ATA port to which the device is attached
2585 * @scsidev: SCSI device from which we derive the ATA device
2587 * Given various information provided in struct scsi_cmnd,
2588 * map that onto an ATA bus, and using that mapping
2589 * determine which ata_device is associated with the
2590 * SCSI command to be sent.
2593 * spin_lock_irqsave(host lock)
2596 * Associated ATA device, or %NULL if not found.
2598 static struct ata_device *
2599 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2601 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2603 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2610 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2611 * @byte1: Byte 1 from pass-thru CDB.
2614 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2617 ata_scsi_map_proto(u8 byte1)
2619 switch((byte1 & 0x1e) >> 1) {
2620 case 3: /* Non-data */
2621 return ATA_PROT_NODATA;
2624 case 10: /* UDMA Data-in */
2625 case 11: /* UDMA Data-Out */
2626 return ATA_PROT_DMA;
2628 case 4: /* PIO Data-in */
2629 case 5: /* PIO Data-out */
2630 return ATA_PROT_PIO;
2632 case 0: /* Hard Reset */
2634 case 8: /* Device Diagnostic */
2635 case 9: /* Device Reset */
2636 case 7: /* DMA Queued */
2637 case 12: /* FPDMA */
2638 case 15: /* Return Response Info */
2639 default: /* Reserved */
2643 return ATA_PROT_UNKNOWN;
2647 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2648 * @qc: command structure to be initialized
2650 * Handles either 12 or 16-byte versions of the CDB.
2653 * Zero on success, non-zero on failure.
2655 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2657 struct ata_taskfile *tf = &(qc->tf);
2658 struct scsi_cmnd *scmd = qc->scsicmd;
2659 struct ata_device *dev = qc->dev;
2660 const u8 *cdb = scmd->cmnd;
2662 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2666 * Filter TPM commands by default. These provide an
2667 * essentially uncontrolled encrypted "back door" between
2668 * applications and the disk. Set libata.allow_tpm=1 if you
2669 * have a real reason for wanting to use them. This ensures
2670 * that installed software cannot easily mess stuff up without
2671 * user intent. DVR type users will probably ship with this enabled
2672 * for movie content management.
2674 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2675 * for this and should do in future but that it is not sufficient as
2676 * DCS is an optional feature set. Thus we also do the software filter
2677 * so that we comply with the TC consortium stated goal that the user
2678 * can turn off TC features of their system.
2680 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2683 /* We may not issue DMA commands if no DMA mode is set */
2684 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2688 * 12 and 16 byte CDBs use different offsets to
2689 * provide the various register values.
2691 if (cdb[0] == ATA_16) {
2693 * 16-byte CDB - may contain extended commands.
2695 * If that is the case, copy the upper byte register values.
2697 if (cdb[1] & 0x01) {
2698 tf->hob_feature = cdb[3];
2699 tf->hob_nsect = cdb[5];
2700 tf->hob_lbal = cdb[7];
2701 tf->hob_lbam = cdb[9];
2702 tf->hob_lbah = cdb[11];
2703 tf->flags |= ATA_TFLAG_LBA48;
2705 tf->flags &= ~ATA_TFLAG_LBA48;
2708 * Always copy low byte, device and command registers.
2710 tf->feature = cdb[4];
2715 tf->device = cdb[13];
2716 tf->command = cdb[14];
2719 * 12-byte CDB - incapable of extended commands.
2721 tf->flags &= ~ATA_TFLAG_LBA48;
2723 tf->feature = cdb[3];
2728 tf->device = cdb[8];
2729 tf->command = cdb[9];
2732 /* enforce correct master/slave bit */
2733 tf->device = dev->devno ?
2734 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2736 /* sanity check for pio multi commands */
2737 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2740 if (is_multi_taskfile(tf)) {
2741 unsigned int multi_count = 1 << (cdb[1] >> 5);
2743 /* compare the passed through multi_count
2744 * with the cached multi_count of libata
2746 if (multi_count != dev->multi_count)
2747 ata_dev_printk(dev, KERN_WARNING,
2748 "invalid multi_count %u ignored\n",
2752 /* READ/WRITE LONG use a non-standard sect_size */
2753 qc->sect_size = ATA_SECT_SIZE;
2754 switch (tf->command) {
2755 case ATA_CMD_READ_LONG:
2756 case ATA_CMD_READ_LONG_ONCE:
2757 case ATA_CMD_WRITE_LONG:
2758 case ATA_CMD_WRITE_LONG_ONCE:
2759 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2761 qc->sect_size = scsi_bufflen(scmd);
2765 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2766 * SET_FEATURES - XFER MODE must be preceded/succeeded
2767 * by an update to hardware-specific registers for each
2768 * controller (i.e. the reason for ->set_piomode(),
2769 * ->set_dmamode(), and ->post_set_mode() hooks).
2771 if ((tf->command == ATA_CMD_SET_FEATURES)
2772 && (tf->feature == SETFEATURES_XFER))
2776 * Set flags so that all registers will be written,
2777 * and pass on write indication (used for PIO/DMA
2780 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2782 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2783 tf->flags |= ATA_TFLAG_WRITE;
2786 * Set transfer length.
2788 * TODO: find out if we need to do more here to
2789 * cover scatter/gather case.
2791 ata_qc_set_pc_nbytes(qc);
2793 /* request result TF and be quiet about device error */
2794 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2799 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2800 /* "Invalid field in cdb" */
2805 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2807 * @cmd: SCSI command opcode to consider
2809 * Look up the SCSI command given, and determine whether the
2810 * SCSI command is to be translated or simulated.
2813 * Pointer to translation function if possible, %NULL if not.
2816 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2826 return ata_scsi_rw_xlat;
2828 case SYNCHRONIZE_CACHE:
2829 if (ata_try_flush_cache(dev))
2830 return ata_scsi_flush_xlat;
2835 return ata_scsi_verify_xlat;
2839 return ata_scsi_pass_thru;
2842 return ata_scsi_start_stop_xlat;
2849 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2850 * @ap: ATA port to which the command was being sent
2851 * @cmd: SCSI command to dump
2853 * Prints the contents of a SCSI command via printk().
2856 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2857 struct scsi_cmnd *cmd)
2860 struct scsi_device *scsidev = cmd->device;
2861 u8 *scsicmd = cmd->cmnd;
2863 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2865 scsidev->channel, scsidev->id, scsidev->lun,
2866 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2867 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2872 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2873 void (*done)(struct scsi_cmnd *),
2874 struct ata_device *dev)
2876 u8 scsi_op = scmd->cmnd[0];
2877 ata_xlat_func_t xlat_func;
2880 if (dev->class == ATA_DEV_ATA) {
2881 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2884 xlat_func = ata_get_xlat_func(dev, scsi_op);
2886 if (unlikely(!scmd->cmd_len))
2890 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2891 /* relay SCSI command to ATAPI device */
2892 int len = COMMAND_SIZE(scsi_op);
2893 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2896 xlat_func = atapi_xlat;
2898 /* ATA_16 passthru, treat as an ATA command */
2899 if (unlikely(scmd->cmd_len > 16))
2902 xlat_func = ata_get_xlat_func(dev, scsi_op);
2907 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2909 ata_scsi_simulate(dev, scmd, done);
2914 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2915 scmd->cmd_len, scsi_op, dev->cdb_len);
2916 scmd->result = DID_ERROR << 16;
2922 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2923 * @cmd: SCSI command to be sent
2924 * @done: Completion function, called when command is complete
2926 * In some cases, this function translates SCSI commands into
2927 * ATA taskfiles, and queues the taskfiles to be sent to
2928 * hardware. In other cases, this function simulates a
2929 * SCSI device by evaluating and responding to certain
2930 * SCSI commands. This creates the overall effect of
2931 * ATA and ATAPI devices appearing as SCSI devices.
2934 * Releases scsi-layer-held lock, and obtains host lock.
2937 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2940 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2942 struct ata_port *ap;
2943 struct ata_device *dev;
2944 struct scsi_device *scsidev = cmd->device;
2945 struct Scsi_Host *shost = scsidev->host;
2948 ap = ata_shost_to_port(shost);
2950 spin_unlock(shost->host_lock);
2951 spin_lock(ap->lock);
2953 ata_scsi_dump_cdb(ap, cmd);
2955 dev = ata_scsi_find_dev(ap, scsidev);
2957 rc = __ata_scsi_queuecmd(cmd, done, dev);
2959 cmd->result = (DID_BAD_TARGET << 16);
2963 spin_unlock(ap->lock);
2964 spin_lock(shost->host_lock);
2969 * ata_scsi_simulate - simulate SCSI command on ATA device
2970 * @dev: the target device
2971 * @cmd: SCSI command being sent to device.
2972 * @done: SCSI command completion function.
2974 * Interprets and directly executes a select list of SCSI commands
2975 * that can be handled internally.
2978 * spin_lock_irqsave(host lock)
2981 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2982 void (*done)(struct scsi_cmnd *))
2984 struct ata_scsi_args args;
2985 const u8 *scsicmd = cmd->cmnd;
2993 switch(scsicmd[0]) {
2994 /* TODO: worth improving? */
2996 ata_scsi_invalid_field(cmd, done);
3000 if (scsicmd[1] & 2) /* is CmdDt set? */
3001 ata_scsi_invalid_field(cmd, done);
3002 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3003 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3004 else switch (scsicmd[2]) {
3006 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3009 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3012 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3015 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3018 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3021 ata_scsi_invalid_field(cmd, done);
3028 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3031 case MODE_SELECT: /* unconditionally return */
3032 case MODE_SELECT_10: /* bad-field-in-cdb */
3033 ata_scsi_invalid_field(cmd, done);
3037 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3040 case SERVICE_ACTION_IN:
3041 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3042 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3044 ata_scsi_invalid_field(cmd, done);
3048 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3052 ata_scsi_set_sense(cmd, 0, 0, 0);
3053 cmd->result = (DRIVER_SENSE << 24);
3057 /* if we reach this, then writeback caching is disabled,
3058 * turning this into a no-op.
3060 case SYNCHRONIZE_CACHE:
3063 /* no-op's, complete with success */
3067 case TEST_UNIT_READY:
3068 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3071 case SEND_DIAGNOSTIC:
3072 tmp8 = scsicmd[1] & ~(1 << 3);
3073 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3074 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3076 ata_scsi_invalid_field(cmd, done);
3079 /* all other commands */
3081 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3082 /* "Invalid command operation code" */
3088 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3092 for (i = 0; i < host->n_ports; i++) {
3093 struct ata_port *ap = host->ports[i];
3094 struct Scsi_Host *shost;
3097 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3101 *(struct ata_port **)&shost->hostdata[0] = ap;
3102 ap->scsi_host = shost;
3104 shost->transportt = &ata_scsi_transport_template;
3105 shost->unique_id = ap->print_id;
3108 shost->max_channel = 1;
3109 shost->max_cmd_len = 16;
3111 /* Schedule policy is determined by ->qc_defer()
3112 * callback and it needs to see every deferred qc.
3113 * Set host_blocked to 1 to prevent SCSI midlayer from
3114 * automatically deferring requests.
3116 shost->max_host_blocked = 1;
3118 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3126 scsi_host_put(host->ports[i]->scsi_host);
3129 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3131 scsi_remove_host(shost);
3132 scsi_host_put(shost);
3137 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3140 struct ata_device *last_failed_dev = NULL;
3141 struct ata_link *link;
3142 struct ata_device *dev;
3144 if (ap->flags & ATA_FLAG_DISABLED)
3148 ata_port_for_each_link(link, ap) {
3149 ata_link_for_each_dev(dev, link) {
3150 struct scsi_device *sdev;
3151 int channel = 0, id = 0;
3153 if (!ata_dev_enabled(dev) || dev->sdev)
3156 if (ata_is_host_link(link))
3159 channel = link->pmp;
3161 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3163 if (!IS_ERR(sdev)) {
3165 scsi_device_put(sdev);
3170 /* If we scanned while EH was in progress or allocation
3171 * failure occurred, scan would have failed silently. Check
3172 * whether all devices are attached.
3174 ata_port_for_each_link(link, ap) {
3175 ata_link_for_each_dev(dev, link) {
3176 if (ata_dev_enabled(dev) && !dev->sdev)
3184 /* we're missing some SCSI devices */
3186 /* If caller requested synchrnous scan && we've made
3187 * any progress, sleep briefly and repeat.
3189 if (dev != last_failed_dev) {
3191 last_failed_dev = dev;
3195 /* We might be failing to detect boot device, give it
3196 * a few more chances.
3203 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3204 "failed without making any progress,\n"
3205 " switching to async\n");
3208 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3209 round_jiffies_relative(HZ));
3213 * ata_scsi_offline_dev - offline attached SCSI device
3214 * @dev: ATA device to offline attached SCSI device for
3216 * This function is called from ata_eh_hotplug() and responsible
3217 * for taking the SCSI device attached to @dev offline. This
3218 * function is called with host lock which protects dev->sdev
3222 * spin_lock_irqsave(host lock)
3225 * 1 if attached SCSI device exists, 0 otherwise.
3227 int ata_scsi_offline_dev(struct ata_device *dev)
3230 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3237 * ata_scsi_remove_dev - remove attached SCSI device
3238 * @dev: ATA device to remove attached SCSI device for
3240 * This function is called from ata_eh_scsi_hotplug() and
3241 * responsible for removing the SCSI device attached to @dev.
3244 * Kernel thread context (may sleep).
3246 static void ata_scsi_remove_dev(struct ata_device *dev)
3248 struct ata_port *ap = dev->link->ap;
3249 struct scsi_device *sdev;
3250 unsigned long flags;
3252 /* Alas, we need to grab scan_mutex to ensure SCSI device
3253 * state doesn't change underneath us and thus
3254 * scsi_device_get() always succeeds. The mutex locking can
3255 * be removed if there is __scsi_device_get() interface which
3256 * increments reference counts regardless of device state.
3258 mutex_lock(&ap->scsi_host->scan_mutex);
3259 spin_lock_irqsave(ap->lock, flags);
3261 /* clearing dev->sdev is protected by host lock */
3266 /* If user initiated unplug races with us, sdev can go
3267 * away underneath us after the host lock and
3268 * scan_mutex are released. Hold onto it.
3270 if (scsi_device_get(sdev) == 0) {
3271 /* The following ensures the attached sdev is
3272 * offline on return from ata_scsi_offline_dev()
3273 * regardless it wins or loses the race
3274 * against this function.
3276 scsi_device_set_state(sdev, SDEV_OFFLINE);
3283 spin_unlock_irqrestore(ap->lock, flags);
3284 mutex_unlock(&ap->scsi_host->scan_mutex);
3287 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3288 sdev->sdev_gendev.bus_id);
3290 scsi_remove_device(sdev);
3291 scsi_device_put(sdev);
3295 static void ata_scsi_handle_link_detach(struct ata_link *link)
3297 struct ata_port *ap = link->ap;
3298 struct ata_device *dev;
3300 ata_link_for_each_dev(dev, link) {
3301 unsigned long flags;
3303 if (!(dev->flags & ATA_DFLAG_DETACHED))
3306 spin_lock_irqsave(ap->lock, flags);
3307 dev->flags &= ~ATA_DFLAG_DETACHED;
3308 spin_unlock_irqrestore(ap->lock, flags);
3310 ata_scsi_remove_dev(dev);
3315 * ata_scsi_media_change_notify - send media change event
3316 * @dev: Pointer to the disk device with media change event
3318 * Tell the block layer to send a media change notification
3322 * spin_lock_irqsave(host lock)
3324 void ata_scsi_media_change_notify(struct ata_device *dev)
3327 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3332 * ata_scsi_hotplug - SCSI part of hotplug
3333 * @work: Pointer to ATA port to perform SCSI hotplug on
3335 * Perform SCSI part of hotplug. It's executed from a separate
3336 * workqueue after EH completes. This is necessary because SCSI
3337 * hot plugging requires working EH and hot unplugging is
3338 * synchronized with hot plugging with a mutex.
3341 * Kernel thread context (may sleep).
3343 void ata_scsi_hotplug(struct work_struct *work)
3345 struct ata_port *ap =
3346 container_of(work, struct ata_port, hotplug_task.work);
3349 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3350 DPRINTK("ENTER/EXIT - unloading\n");
3356 /* Unplug detached devices. We cannot use link iterator here
3357 * because PMP links have to be scanned even if PMP is
3358 * currently not attached. Iterate manually.
3360 ata_scsi_handle_link_detach(&ap->link);
3362 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3363 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3365 /* scan for new ones */
3366 ata_scsi_scan_host(ap, 0);
3372 * ata_scsi_user_scan - indication for user-initiated bus scan
3373 * @shost: SCSI host to scan
3374 * @channel: Channel to scan
3378 * This function is called when user explicitly requests bus
3379 * scan. Set probe pending flag and invoke EH.
3382 * SCSI layer (we don't care)
3387 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3388 unsigned int id, unsigned int lun)
3390 struct ata_port *ap = ata_shost_to_port(shost);
3391 unsigned long flags;
3394 if (!ap->ops->error_handler)
3397 if (lun != SCAN_WILD_CARD && lun)
3400 if (!sata_pmp_attached(ap)) {
3401 if (channel != SCAN_WILD_CARD && channel)
3405 if (id != SCAN_WILD_CARD && id)
3410 spin_lock_irqsave(ap->lock, flags);
3412 if (devno == SCAN_WILD_CARD) {
3413 struct ata_link *link;
3415 ata_port_for_each_link(link, ap) {
3416 struct ata_eh_info *ehi = &link->eh_info;
3417 ehi->probe_mask |= ATA_ALL_DEVICES;
3418 ehi->action |= ATA_EH_RESET;
3421 struct ata_device *dev = ata_find_dev(ap, devno);
3424 struct ata_eh_info *ehi = &dev->link->eh_info;
3425 ehi->probe_mask |= 1 << dev->devno;
3426 ehi->action |= ATA_EH_RESET;
3432 ata_port_schedule_eh(ap);
3433 spin_unlock_irqrestore(ap->lock, flags);
3434 ata_port_wait_eh(ap);
3436 spin_unlock_irqrestore(ap->lock, flags);
3442 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3443 * @work: Pointer to ATA port to perform scsi_rescan_device()
3445 * After ATA pass thru (SAT) commands are executed successfully,
3446 * libata need to propagate the changes to SCSI layer. This
3447 * function must be executed from ata_aux_wq such that sdev
3448 * attach/detach don't race with rescan.
3451 * Kernel thread context (may sleep).
3453 void ata_scsi_dev_rescan(struct work_struct *work)
3455 struct ata_port *ap =
3456 container_of(work, struct ata_port, scsi_rescan_task);
3457 struct ata_link *link;
3458 struct ata_device *dev;
3459 unsigned long flags;
3461 spin_lock_irqsave(ap->lock, flags);
3463 ata_port_for_each_link(link, ap) {
3464 ata_link_for_each_dev(dev, link) {
3465 struct scsi_device *sdev = dev->sdev;
3467 if (!ata_dev_enabled(dev) || !sdev)
3469 if (scsi_device_get(sdev))
3472 spin_unlock_irqrestore(ap->lock, flags);
3473 scsi_rescan_device(&(sdev->sdev_gendev));
3474 scsi_device_put(sdev);
3475 spin_lock_irqsave(ap->lock, flags);
3479 spin_unlock_irqrestore(ap->lock, flags);
3483 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3484 * @host: ATA host container for all SAS ports
3485 * @port_info: Information from low-level host driver
3486 * @shost: SCSI host that the scsi device is attached to
3489 * PCI/etc. bus probe sem.
3492 * ata_port pointer on success / NULL on failure.
3495 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3496 struct ata_port_info *port_info,
3497 struct Scsi_Host *shost)
3499 struct ata_port *ap;
3501 ap = ata_port_alloc(host);
3506 ap->lock = shost->host_lock;
3507 ap->pio_mask = port_info->pio_mask;
3508 ap->mwdma_mask = port_info->mwdma_mask;
3509 ap->udma_mask = port_info->udma_mask;
3510 ap->flags |= port_info->flags;
3511 ap->ops = port_info->port_ops;
3512 ap->cbl = ATA_CBL_SATA;
3516 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3519 * ata_sas_port_start - Set port up for dma.
3520 * @ap: Port to initialize
3522 * Called just after data structures for each port are
3525 * May be used as the port_start() entry in ata_port_operations.
3528 * Inherited from caller.
3530 int ata_sas_port_start(struct ata_port *ap)
3534 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3537 * ata_port_stop - Undo ata_sas_port_start()
3538 * @ap: Port to shut down
3540 * May be used as the port_stop() entry in ata_port_operations.
3543 * Inherited from caller.
3546 void ata_sas_port_stop(struct ata_port *ap)
3549 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3552 * ata_sas_port_init - Initialize a SATA device
3553 * @ap: SATA port to initialize
3556 * PCI/etc. bus probe sem.
3559 * Zero on success, non-zero on error.
3562 int ata_sas_port_init(struct ata_port *ap)
3564 int rc = ap->ops->port_start(ap);
3567 ap->print_id = ata_print_id++;
3568 rc = ata_bus_probe(ap);
3573 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3576 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3577 * @ap: SATA port to destroy
3581 void ata_sas_port_destroy(struct ata_port *ap)
3583 if (ap->ops->port_stop)
3584 ap->ops->port_stop(ap);
3587 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3590 * ata_sas_slave_configure - Default slave_config routine for libata devices
3591 * @sdev: SCSI device to configure
3592 * @ap: ATA port to which SCSI device is attached
3598 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3600 ata_scsi_sdev_config(sdev);
3601 ata_scsi_dev_config(sdev, ap->link.device);
3604 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3607 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3608 * @cmd: SCSI command to be sent
3609 * @done: Completion function, called when command is complete
3610 * @ap: ATA port to which the command is being sent
3613 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3617 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3618 struct ata_port *ap)
3622 ata_scsi_dump_cdb(ap, cmd);
3624 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3625 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3627 cmd->result = (DID_BAD_TARGET << 16);
3632 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);