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/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <scsi/scsi_eh.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_tcq.h>
46 #include <scsi/scsi_transport.h>
47 #include <linux/libata.h>
48 #include <linux/hdreg.h>
49 #include <linux/uaccess.h>
50 #include <linux/suspend.h>
51 #include <asm/unaligned.h>
54 #include "libata-transport.h"
56 #define ATA_SCSI_RBUF_SIZE 4096
58 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
59 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
61 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
63 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
64 const struct scsi_device *scsidev);
65 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
66 const struct scsi_device *scsidev);
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 */
106 static const struct {
109 } link_pm_policy[] = {
110 { NOT_AVAILABLE, "max_performance" },
111 { MIN_POWER, "min_power" },
112 { MAX_PERFORMANCE, "max_performance" },
113 { MEDIUM_POWER, "medium_power" },
116 static const char *ata_scsi_lpm_get(enum link_pm policy)
120 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
121 if (link_pm_policy[i].value == policy)
122 return link_pm_policy[i].name;
127 static ssize_t ata_scsi_lpm_put(struct device *dev,
128 struct device_attribute *attr,
129 const char *buf, size_t count)
131 struct Scsi_Host *shost = class_to_shost(dev);
132 struct ata_port *ap = ata_shost_to_port(shost);
133 enum link_pm policy = 0;
137 * we are skipping array location 0 on purpose - this
138 * is because a value of NOT_AVAILABLE is displayed
139 * to the user as max_performance, but when the user
140 * writes "max_performance", they actually want the
141 * value to match MAX_PERFORMANCE.
143 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
144 const int len = strlen(link_pm_policy[i].name);
145 if (strncmp(link_pm_policy[i].name, buf, len) == 0) {
146 policy = link_pm_policy[i].value;
153 ata_lpm_schedule(ap, policy);
158 ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
160 struct Scsi_Host *shost = class_to_shost(dev);
161 struct ata_port *ap = ata_shost_to_port(shost);
163 ata_scsi_lpm_get(ap->pm_policy);
168 return snprintf(buf, 23, "%s\n", policy);
170 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
171 ata_scsi_lpm_show, ata_scsi_lpm_put);
172 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
174 static ssize_t ata_scsi_park_show(struct device *device,
175 struct device_attribute *attr, char *buf)
177 struct scsi_device *sdev = to_scsi_device(device);
179 struct ata_link *link;
180 struct ata_device *dev;
181 unsigned long flags, now;
182 unsigned int uninitialized_var(msecs);
185 ap = ata_shost_to_port(sdev->host);
187 spin_lock_irqsave(ap->lock, flags);
188 dev = ata_scsi_find_dev(ap, sdev);
193 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
200 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
201 link->eh_context.unloaded_mask & (1 << dev->devno) &&
202 time_after(dev->unpark_deadline, now))
203 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
208 spin_unlock_irq(ap->lock);
210 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
213 static ssize_t ata_scsi_park_store(struct device *device,
214 struct device_attribute *attr,
215 const char *buf, size_t len)
217 struct scsi_device *sdev = to_scsi_device(device);
219 struct ata_device *dev;
224 rc = strict_strtol(buf, 10, &input);
225 if (rc || input < -2)
227 if (input > ATA_TMOUT_MAX_PARK) {
229 input = ATA_TMOUT_MAX_PARK;
232 ap = ata_shost_to_port(sdev->host);
234 spin_lock_irqsave(ap->lock, flags);
235 dev = ata_scsi_find_dev(ap, sdev);
236 if (unlikely(!dev)) {
240 if (dev->class != ATA_DEV_ATA) {
246 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
251 dev->unpark_deadline = ata_deadline(jiffies, input);
252 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
253 ata_port_schedule_eh(ap);
254 complete(&ap->park_req_pending);
258 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
261 dev->flags |= ATA_DFLAG_NO_UNLOAD;
266 spin_unlock_irqrestore(ap->lock, flags);
268 return rc ? rc : len;
270 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
271 ata_scsi_park_show, ata_scsi_park_store);
272 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
274 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
276 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
278 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
282 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
283 const char *buf, size_t count)
285 struct Scsi_Host *shost = class_to_shost(dev);
286 struct ata_port *ap = ata_shost_to_port(shost);
287 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
288 return ap->ops->em_store(ap, buf, count);
293 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
296 struct Scsi_Host *shost = class_to_shost(dev);
297 struct ata_port *ap = ata_shost_to_port(shost);
299 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
300 return ap->ops->em_show(ap, buf);
303 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
304 ata_scsi_em_message_show, ata_scsi_em_message_store);
305 EXPORT_SYMBOL_GPL(dev_attr_em_message);
308 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
311 struct Scsi_Host *shost = class_to_shost(dev);
312 struct ata_port *ap = ata_shost_to_port(shost);
314 return snprintf(buf, 23, "%d\n", ap->em_message_type);
316 DEVICE_ATTR(em_message_type, S_IRUGO,
317 ata_scsi_em_message_type_show, NULL);
318 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
321 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
324 struct scsi_device *sdev = to_scsi_device(dev);
325 struct ata_port *ap = ata_shost_to_port(sdev->host);
326 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
328 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
329 return ap->ops->sw_activity_show(atadev, buf);
334 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
335 const char *buf, size_t count)
337 struct scsi_device *sdev = to_scsi_device(dev);
338 struct ata_port *ap = ata_shost_to_port(sdev->host);
339 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340 enum sw_activity val;
343 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
344 val = simple_strtoul(buf, NULL, 0);
346 case OFF: case BLINK_ON: case BLINK_OFF:
347 rc = ap->ops->sw_activity_store(atadev, val);
356 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
357 ata_scsi_activity_store);
358 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
360 struct device_attribute *ata_common_sdev_attrs[] = {
361 &dev_attr_unload_heads,
364 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
366 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
367 void (*done)(struct scsi_cmnd *))
369 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
370 /* "Invalid field in cbd" */
375 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
376 * @sdev: SCSI device for which BIOS geometry is to be determined
377 * @bdev: block device associated with @sdev
378 * @capacity: capacity of SCSI device
379 * @geom: location to which geometry will be output
381 * Generic bios head/sector/cylinder calculator
382 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
383 * mapping. Some situations may arise where the disk is not
384 * bootable if this is not used.
387 * Defined by the SCSI layer. We don't really care.
392 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
393 sector_t capacity, int geom[])
397 sector_div(capacity, 255*63);
404 * ata_scsi_unlock_native_capacity - unlock native capacity
405 * @sdev: SCSI device to adjust device capacity for
407 * This function is called if a partition on @sdev extends beyond
408 * the end of the device. It requests EH to unlock HPA.
411 * Defined by the SCSI layer. Might sleep.
413 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
415 struct ata_port *ap = ata_shost_to_port(sdev->host);
416 struct ata_device *dev;
419 spin_lock_irqsave(ap->lock, flags);
421 dev = ata_scsi_find_dev(ap, sdev);
422 if (dev && dev->n_sectors < dev->n_native_sectors) {
423 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
424 dev->link->eh_info.action |= ATA_EH_RESET;
425 ata_port_schedule_eh(ap);
428 spin_unlock_irqrestore(ap->lock, flags);
429 ata_port_wait_eh(ap);
433 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
435 * @sdev: SCSI device to get identify data for
436 * @arg: User buffer area for identify data
439 * Defined by the SCSI layer. We don't really care.
442 * Zero on success, negative errno on error.
444 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
447 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
448 u16 __user *dst = arg;
454 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
457 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
458 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
461 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
462 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
465 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
466 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
473 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
474 * @scsidev: Device to which we are issuing command
475 * @arg: User provided data for issuing command
478 * Defined by the SCSI layer. We don't really care.
481 * Zero on success, negative errno on error.
483 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
486 u8 scsi_cmd[MAX_COMMAND_SIZE];
487 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
489 enum dma_data_direction data_dir;
495 if (copy_from_user(args, arg, sizeof(args)))
498 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
502 memset(scsi_cmd, 0, sizeof(scsi_cmd));
505 argsize = ATA_SECT_SIZE * args[3];
506 argbuf = kmalloc(argsize, GFP_KERNEL);
507 if (argbuf == NULL) {
512 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
513 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
514 block count in sector count field */
515 data_dir = DMA_FROM_DEVICE;
517 scsi_cmd[1] = (3 << 1); /* Non-data */
518 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
522 scsi_cmd[0] = ATA_16;
524 scsi_cmd[4] = args[2];
525 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
526 scsi_cmd[6] = args[3];
527 scsi_cmd[8] = args[1];
531 scsi_cmd[6] = args[1];
533 scsi_cmd[14] = args[0];
535 /* Good values for timeout and retries? Values below
536 from scsi_ioctl_send_command() for default case... */
537 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
538 sensebuf, (10*HZ), 5, 0, NULL);
540 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
541 u8 *desc = sensebuf + 8;
542 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
544 /* If we set cc then ATA pass-through will cause a
545 * check condition even if no error. Filter that. */
546 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
547 struct scsi_sense_hdr sshdr;
548 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
550 if (sshdr.sense_key == 0 &&
551 sshdr.asc == 0 && sshdr.ascq == 0)
552 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
555 /* Send userspace a few ATA registers (same as drivers/ide) */
556 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
557 desc[0] == 0x09) { /* code is "ATA Descriptor" */
558 args[0] = desc[13]; /* status */
559 args[1] = desc[3]; /* error */
560 args[2] = desc[5]; /* sector count (0:7) */
561 if (copy_to_user(arg, args, sizeof(args)))
573 && copy_to_user(arg + sizeof(args), argbuf, argsize))
582 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
583 * @scsidev: Device to which we are issuing command
584 * @arg: User provided data for issuing command
587 * Defined by the SCSI layer. We don't really care.
590 * Zero on success, negative errno on error.
592 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
595 u8 scsi_cmd[MAX_COMMAND_SIZE];
596 u8 args[7], *sensebuf = NULL;
602 if (copy_from_user(args, arg, sizeof(args)))
605 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
609 memset(scsi_cmd, 0, sizeof(scsi_cmd));
610 scsi_cmd[0] = ATA_16;
611 scsi_cmd[1] = (3 << 1); /* Non-data */
612 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
613 scsi_cmd[4] = args[1];
614 scsi_cmd[6] = args[2];
615 scsi_cmd[8] = args[3];
616 scsi_cmd[10] = args[4];
617 scsi_cmd[12] = args[5];
618 scsi_cmd[13] = args[6] & 0x4f;
619 scsi_cmd[14] = args[0];
621 /* Good values for timeout and retries? Values below
622 from scsi_ioctl_send_command() for default case... */
623 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
624 sensebuf, (10*HZ), 5, 0, NULL);
626 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
627 u8 *desc = sensebuf + 8;
628 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
630 /* If we set cc then ATA pass-through will cause a
631 * check condition even if no error. Filter that. */
632 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
633 struct scsi_sense_hdr sshdr;
634 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
636 if (sshdr.sense_key == 0 &&
637 sshdr.asc == 0 && sshdr.ascq == 0)
638 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
641 /* Send userspace ATA registers */
642 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
643 desc[0] == 0x09) {/* code is "ATA Descriptor" */
644 args[0] = desc[13]; /* status */
645 args[1] = desc[3]; /* error */
646 args[2] = desc[5]; /* sector count (0:7) */
647 args[3] = desc[7]; /* lbal */
648 args[4] = desc[9]; /* lbam */
649 args[5] = desc[11]; /* lbah */
650 args[6] = desc[12]; /* select */
651 if (copy_to_user(arg, args, sizeof(args)))
666 static int ata_ioc32(struct ata_port *ap)
668 if (ap->flags & ATA_FLAG_PIO_DMA)
670 if (ap->pflags & ATA_PFLAG_PIO32)
675 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
676 int cmd, void __user *arg)
678 int val = -EINVAL, rc = -EINVAL;
682 case ATA_IOC_GET_IO32:
683 spin_lock_irqsave(ap->lock, flags);
685 spin_unlock_irqrestore(ap->lock, flags);
686 if (copy_to_user(arg, &val, 1))
690 case ATA_IOC_SET_IO32:
691 val = (unsigned long) arg;
693 spin_lock_irqsave(ap->lock, flags);
694 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
696 ap->pflags |= ATA_PFLAG_PIO32;
698 ap->pflags &= ~ATA_PFLAG_PIO32;
700 if (val != ata_ioc32(ap))
703 spin_unlock_irqrestore(ap->lock, flags);
706 case HDIO_GET_IDENTITY:
707 return ata_get_identity(ap, scsidev, arg);
710 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
712 return ata_cmd_ioctl(scsidev, arg);
714 case HDIO_DRIVE_TASK:
715 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
717 return ata_task_ioctl(scsidev, arg);
726 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
728 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
730 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
733 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
736 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
737 * @dev: ATA device to which the new command is attached
738 * @cmd: SCSI command that originated this ATA command
739 * @done: SCSI command completion function
741 * Obtain a reference to an unused ata_queued_cmd structure,
742 * which is the basic libata structure representing a single
743 * ATA command sent to the hardware.
745 * If a command was available, fill in the SCSI-specific
746 * portions of the structure with information on the
750 * spin_lock_irqsave(host lock)
753 * Command allocated, or %NULL if none available.
755 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
756 struct scsi_cmnd *cmd,
757 void (*done)(struct scsi_cmnd *))
759 struct ata_queued_cmd *qc;
761 qc = ata_qc_new_init(dev);
766 qc->sg = scsi_sglist(cmd);
767 qc->n_elem = scsi_sg_count(cmd);
769 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
776 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
778 struct scsi_cmnd *scmd = qc->scsicmd;
780 qc->extrabytes = scmd->request->extra_len;
781 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
785 * ata_dump_status - user friendly display of error info
786 * @id: id of the port in question
787 * @tf: ptr to filled out taskfile
789 * Decode and dump the ATA error/status registers for the user so
790 * that they have some idea what really happened at the non
791 * make-believe layer.
794 * inherited from caller
796 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
798 u8 stat = tf->command, err = tf->feature;
800 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
801 if (stat & ATA_BUSY) {
802 printk("Busy }\n"); /* Data is not valid in this case */
804 if (stat & 0x40) printk("DriveReady ");
805 if (stat & 0x20) printk("DeviceFault ");
806 if (stat & 0x10) printk("SeekComplete ");
807 if (stat & 0x08) printk("DataRequest ");
808 if (stat & 0x04) printk("CorrectedError ");
809 if (stat & 0x02) printk("Index ");
810 if (stat & 0x01) printk("Error ");
814 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
815 if (err & 0x04) printk("DriveStatusError ");
817 if (err & 0x04) printk("BadCRC ");
818 else printk("Sector ");
820 if (err & 0x40) printk("UncorrectableError ");
821 if (err & 0x10) printk("SectorIdNotFound ");
822 if (err & 0x02) printk("TrackZeroNotFound ");
823 if (err & 0x01) printk("AddrMarkNotFound ");
830 * ata_to_sense_error - convert ATA error to SCSI error
831 * @id: ATA device number
832 * @drv_stat: value contained in ATA status register
833 * @drv_err: value contained in ATA error register
834 * @sk: the sense key we'll fill out
835 * @asc: the additional sense code we'll fill out
836 * @ascq: the additional sense code qualifier we'll fill out
837 * @verbose: be verbose
839 * Converts an ATA error into a SCSI error. Fill out pointers to
840 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
841 * format sense blocks.
844 * spin_lock_irqsave(host lock)
846 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
847 u8 *asc, u8 *ascq, int verbose)
851 /* Based on the 3ware driver translation table */
852 static const unsigned char sense_table[][4] = {
854 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
856 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
858 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
859 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
860 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
861 /* MC|ID|ABRT|TRK0|MARK */
862 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
864 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
865 /* Bad address mark */
866 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
868 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
870 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
871 /* Media change request */
872 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
874 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
876 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
878 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
879 /* BBD - block marked bad */
880 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
881 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
883 static const unsigned char stat_table[][4] = {
884 /* Must be first because BUSY means no other bits valid */
885 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
886 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
887 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
888 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
889 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
893 * Is this an error we can process/parse
895 if (drv_stat & ATA_BUSY) {
896 drv_err = 0; /* Ignore the err bits, they're invalid */
900 /* Look for drv_err */
901 for (i = 0; sense_table[i][0] != 0xFF; i++) {
902 /* Look for best matches first */
903 if ((sense_table[i][0] & drv_err) ==
905 *sk = sense_table[i][1];
906 *asc = sense_table[i][2];
907 *ascq = sense_table[i][3];
911 /* No immediate match */
913 printk(KERN_WARNING "ata%u: no sense translation for "
914 "error 0x%02x\n", id, drv_err);
917 /* Fall back to interpreting status bits */
918 for (i = 0; stat_table[i][0] != 0xFF; i++) {
919 if (stat_table[i][0] & drv_stat) {
920 *sk = stat_table[i][1];
921 *asc = stat_table[i][2];
922 *ascq = stat_table[i][3];
926 /* No error? Undecoded? */
928 printk(KERN_WARNING "ata%u: no sense translation for "
929 "status: 0x%02x\n", id, drv_stat);
931 /* We need a sensible error return here, which is tricky, and one
932 that won't cause people to do things like return a disk wrongly */
933 *sk = ABORTED_COMMAND;
939 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
940 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
941 id, drv_stat, drv_err, *sk, *asc, *ascq);
946 * ata_gen_passthru_sense - Generate check condition sense block.
947 * @qc: Command that completed.
949 * This function is specific to the ATA descriptor format sense
950 * block specified for the ATA pass through commands. Regardless
951 * of whether the command errored or not, return a sense
952 * block. Copy all controller registers into the sense
953 * block. Clear sense key, ASC & ASCQ if there is no error.
958 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
960 struct scsi_cmnd *cmd = qc->scsicmd;
961 struct ata_taskfile *tf = &qc->result_tf;
962 unsigned char *sb = cmd->sense_buffer;
963 unsigned char *desc = sb + 8;
964 int verbose = qc->ap->ops->error_handler == NULL;
966 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
968 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
971 * Use ata_to_sense_error() to map status register bits
972 * onto sense key, asc & ascq.
975 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
976 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
977 &sb[1], &sb[2], &sb[3], verbose);
982 * Sense data is current and format is descriptor.
988 /* set length of additional sense data */
993 * Copy registers into sense buffer.
996 desc[3] = tf->feature; /* == error reg */
1000 desc[11] = tf->lbah;
1001 desc[12] = tf->device;
1002 desc[13] = tf->command; /* == status reg */
1005 * Fill in Extend bit, and the high order bytes
1008 if (tf->flags & ATA_TFLAG_LBA48) {
1010 desc[4] = tf->hob_nsect;
1011 desc[6] = tf->hob_lbal;
1012 desc[8] = tf->hob_lbam;
1013 desc[10] = tf->hob_lbah;
1018 * ata_gen_ata_sense - generate a SCSI fixed sense block
1019 * @qc: Command that we are erroring out
1021 * Generate sense block for a failed ATA command @qc. Descriptor
1022 * format is used to accomodate LBA48 block address.
1027 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1029 struct ata_device *dev = qc->dev;
1030 struct scsi_cmnd *cmd = qc->scsicmd;
1031 struct ata_taskfile *tf = &qc->result_tf;
1032 unsigned char *sb = cmd->sense_buffer;
1033 unsigned char *desc = sb + 8;
1034 int verbose = qc->ap->ops->error_handler == NULL;
1037 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1039 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1041 /* sense data is current and format is descriptor */
1044 /* Use ata_to_sense_error() to map status register bits
1045 * onto sense key, asc & ascq.
1048 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1049 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1050 &sb[1], &sb[2], &sb[3], verbose);
1054 block = ata_tf_read_block(&qc->result_tf, dev);
1056 /* information sense data descriptor */
1061 desc[2] |= 0x80; /* valid */
1062 desc[6] = block >> 40;
1063 desc[7] = block >> 32;
1064 desc[8] = block >> 24;
1065 desc[9] = block >> 16;
1066 desc[10] = block >> 8;
1070 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1072 sdev->use_10_for_rw = 1;
1073 sdev->use_10_for_ms = 1;
1075 /* Schedule policy is determined by ->qc_defer() callback and
1076 * it needs to see every deferred qc. Set dev_blocked to 1 to
1077 * prevent SCSI midlayer from automatically deferring
1080 sdev->max_device_blocked = 1;
1084 * atapi_drain_needed - Check whether data transfer may overflow
1085 * @rq: request to be checked
1087 * ATAPI commands which transfer variable length data to host
1088 * might overflow due to application error or hardare bug. This
1089 * function checks whether overflow should be drained and ignored
1096 * 1 if ; otherwise, 0.
1098 static int atapi_drain_needed(struct request *rq)
1100 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1103 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1106 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1109 static int ata_scsi_dev_config(struct scsi_device *sdev,
1110 struct ata_device *dev)
1112 if (!ata_id_has_unload(dev->id))
1113 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1115 /* configure max sectors */
1116 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
1118 if (dev->class == ATA_DEV_ATAPI) {
1119 struct request_queue *q = sdev->request_queue;
1122 /* set the min alignment and padding */
1123 blk_queue_update_dma_alignment(sdev->request_queue,
1124 ATA_DMA_PAD_SZ - 1);
1125 blk_queue_update_dma_pad(sdev->request_queue,
1126 ATA_DMA_PAD_SZ - 1);
1128 /* configure draining */
1129 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1131 ata_dev_printk(dev, KERN_ERR,
1132 "drain buffer allocation failed\n");
1136 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1138 /* ATA devices must be sector aligned */
1139 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1140 blk_queue_update_dma_alignment(sdev->request_queue,
1141 sdev->sector_size - 1);
1142 sdev->manage_start_stop = 1;
1145 if (dev->flags & ATA_DFLAG_AN)
1146 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1148 if (dev->flags & ATA_DFLAG_NCQ) {
1151 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1152 depth = min(ATA_MAX_QUEUE - 1, depth);
1153 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1161 * ata_scsi_slave_config - Set SCSI device attributes
1162 * @sdev: SCSI device to examine
1164 * This is called before we actually start reading
1165 * and writing to the device, to configure certain
1166 * SCSI mid-layer behaviors.
1169 * Defined by SCSI layer. We don't really care.
1172 int ata_scsi_slave_config(struct scsi_device *sdev)
1174 struct ata_port *ap = ata_shost_to_port(sdev->host);
1175 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1178 ata_scsi_sdev_config(sdev);
1181 rc = ata_scsi_dev_config(sdev, dev);
1187 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1188 * @sdev: SCSI device to be destroyed
1190 * @sdev is about to be destroyed for hot/warm unplugging. If
1191 * this unplugging was initiated by libata as indicated by NULL
1192 * dev->sdev, this function doesn't have to do anything.
1193 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1194 * Clear dev->sdev, schedule the device for ATA detach and invoke
1198 * Defined by SCSI layer. We don't really care.
1200 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1202 struct ata_port *ap = ata_shost_to_port(sdev->host);
1203 struct request_queue *q = sdev->request_queue;
1204 unsigned long flags;
1205 struct ata_device *dev;
1207 if (!ap->ops->error_handler)
1210 spin_lock_irqsave(ap->lock, flags);
1211 dev = __ata_scsi_find_dev(ap, sdev);
1212 if (dev && dev->sdev) {
1213 /* SCSI device already in CANCEL state, no need to offline it */
1215 dev->flags |= ATA_DFLAG_DETACH;
1216 ata_port_schedule_eh(ap);
1218 spin_unlock_irqrestore(ap->lock, flags);
1220 kfree(q->dma_drain_buffer);
1221 q->dma_drain_buffer = NULL;
1222 q->dma_drain_size = 0;
1226 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1227 * @sdev: SCSI device to configure queue depth for
1228 * @queue_depth: new queue depth
1229 * @reason: calling context
1231 * This is libata standard hostt->change_queue_depth callback.
1232 * SCSI will call into this callback when user tries to set queue
1236 * SCSI layer (we don't care)
1239 * Newly configured queue depth.
1241 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1244 struct ata_port *ap = ata_shost_to_port(sdev->host);
1245 struct ata_device *dev;
1246 unsigned long flags;
1248 if (reason != SCSI_QDEPTH_DEFAULT)
1251 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1252 return sdev->queue_depth;
1254 dev = ata_scsi_find_dev(ap, sdev);
1255 if (!dev || !ata_dev_enabled(dev))
1256 return sdev->queue_depth;
1259 spin_lock_irqsave(ap->lock, flags);
1260 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1261 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1262 dev->flags |= ATA_DFLAG_NCQ_OFF;
1265 spin_unlock_irqrestore(ap->lock, flags);
1267 /* limit and apply queue depth */
1268 queue_depth = min(queue_depth, sdev->host->can_queue);
1269 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1270 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1272 if (sdev->queue_depth == queue_depth)
1275 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1280 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1281 * @qc: Storage for translated ATA taskfile
1283 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1284 * (to start). Perhaps these commands should be preceded by
1285 * CHECK POWER MODE to see what power mode the device is already in.
1286 * [See SAT revision 5 at www.t10.org]
1289 * spin_lock_irqsave(host lock)
1292 * Zero on success, non-zero on error.
1294 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1296 struct scsi_cmnd *scmd = qc->scsicmd;
1297 struct ata_taskfile *tf = &qc->tf;
1298 const u8 *cdb = scmd->cmnd;
1300 if (scmd->cmd_len < 5)
1303 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1304 tf->protocol = ATA_PROT_NODATA;
1306 ; /* ignore IMMED bit, violates sat-r05 */
1309 goto invalid_fld; /* LOEJ bit set not supported */
1310 if (((cdb[4] >> 4) & 0xf) != 0)
1311 goto invalid_fld; /* power conditions not supported */
1314 tf->nsect = 1; /* 1 sector, lba=0 */
1316 if (qc->dev->flags & ATA_DFLAG_LBA) {
1317 tf->flags |= ATA_TFLAG_LBA;
1322 tf->device |= ATA_LBA;
1325 tf->lbal = 0x1; /* sect */
1326 tf->lbam = 0x0; /* cyl low */
1327 tf->lbah = 0x0; /* cyl high */
1330 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1332 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1333 * or S5) causing some drives to spin up and down again.
1335 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1336 system_state == SYSTEM_POWER_OFF)
1339 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1340 system_entering_hibernation())
1343 /* Issue ATA STANDBY IMMEDIATE command */
1344 tf->command = ATA_CMD_STANDBYNOW1;
1348 * Standby and Idle condition timers could be implemented but that
1349 * would require libata to implement the Power condition mode page
1350 * and allow the user to change it. Changing mode pages requires
1351 * MODE SELECT to be implemented.
1357 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1358 /* "Invalid field in cbd" */
1361 scmd->result = SAM_STAT_GOOD;
1367 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1368 * @qc: Storage for translated ATA taskfile
1370 * Sets up an ATA taskfile to issue FLUSH CACHE or
1374 * spin_lock_irqsave(host lock)
1377 * Zero on success, non-zero on error.
1379 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1381 struct ata_taskfile *tf = &qc->tf;
1383 tf->flags |= ATA_TFLAG_DEVICE;
1384 tf->protocol = ATA_PROT_NODATA;
1386 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1387 tf->command = ATA_CMD_FLUSH_EXT;
1389 tf->command = ATA_CMD_FLUSH;
1391 /* flush is critical for IO integrity, consider it an IO command */
1392 qc->flags |= ATA_QCFLAG_IO;
1398 * scsi_6_lba_len - Get LBA and transfer length
1399 * @cdb: SCSI command to translate
1401 * Calculate LBA and transfer length for 6-byte commands.
1405 * @plen: the transfer length
1407 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1412 VPRINTK("six-byte command\n");
1414 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1415 lba |= ((u64)cdb[2]) << 8;
1416 lba |= ((u64)cdb[3]);
1425 * scsi_10_lba_len - Get LBA and transfer length
1426 * @cdb: SCSI command to translate
1428 * Calculate LBA and transfer length for 10-byte commands.
1432 * @plen: the transfer length
1434 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1439 VPRINTK("ten-byte command\n");
1441 lba |= ((u64)cdb[2]) << 24;
1442 lba |= ((u64)cdb[3]) << 16;
1443 lba |= ((u64)cdb[4]) << 8;
1444 lba |= ((u64)cdb[5]);
1446 len |= ((u32)cdb[7]) << 8;
1447 len |= ((u32)cdb[8]);
1454 * scsi_16_lba_len - Get LBA and transfer length
1455 * @cdb: SCSI command to translate
1457 * Calculate LBA and transfer length for 16-byte commands.
1461 * @plen: the transfer length
1463 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1468 VPRINTK("sixteen-byte command\n");
1470 lba |= ((u64)cdb[2]) << 56;
1471 lba |= ((u64)cdb[3]) << 48;
1472 lba |= ((u64)cdb[4]) << 40;
1473 lba |= ((u64)cdb[5]) << 32;
1474 lba |= ((u64)cdb[6]) << 24;
1475 lba |= ((u64)cdb[7]) << 16;
1476 lba |= ((u64)cdb[8]) << 8;
1477 lba |= ((u64)cdb[9]);
1479 len |= ((u32)cdb[10]) << 24;
1480 len |= ((u32)cdb[11]) << 16;
1481 len |= ((u32)cdb[12]) << 8;
1482 len |= ((u32)cdb[13]);
1489 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1490 * @qc: Storage for translated ATA taskfile
1492 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1495 * spin_lock_irqsave(host lock)
1498 * Zero on success, non-zero on error.
1500 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1502 struct scsi_cmnd *scmd = qc->scsicmd;
1503 struct ata_taskfile *tf = &qc->tf;
1504 struct ata_device *dev = qc->dev;
1505 u64 dev_sectors = qc->dev->n_sectors;
1506 const u8 *cdb = scmd->cmnd;
1510 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1511 tf->protocol = ATA_PROT_NODATA;
1513 if (cdb[0] == VERIFY) {
1514 if (scmd->cmd_len < 10)
1516 scsi_10_lba_len(cdb, &block, &n_block);
1517 } else if (cdb[0] == VERIFY_16) {
1518 if (scmd->cmd_len < 16)
1520 scsi_16_lba_len(cdb, &block, &n_block);
1526 if (block >= dev_sectors)
1528 if ((block + n_block) > dev_sectors)
1531 if (dev->flags & ATA_DFLAG_LBA) {
1532 tf->flags |= ATA_TFLAG_LBA;
1534 if (lba_28_ok(block, n_block)) {
1536 tf->command = ATA_CMD_VERIFY;
1537 tf->device |= (block >> 24) & 0xf;
1538 } else if (lba_48_ok(block, n_block)) {
1539 if (!(dev->flags & ATA_DFLAG_LBA48))
1543 tf->flags |= ATA_TFLAG_LBA48;
1544 tf->command = ATA_CMD_VERIFY_EXT;
1546 tf->hob_nsect = (n_block >> 8) & 0xff;
1548 tf->hob_lbah = (block >> 40) & 0xff;
1549 tf->hob_lbam = (block >> 32) & 0xff;
1550 tf->hob_lbal = (block >> 24) & 0xff;
1552 /* request too large even for LBA48 */
1555 tf->nsect = n_block & 0xff;
1557 tf->lbah = (block >> 16) & 0xff;
1558 tf->lbam = (block >> 8) & 0xff;
1559 tf->lbal = block & 0xff;
1561 tf->device |= ATA_LBA;
1564 u32 sect, head, cyl, track;
1566 if (!lba_28_ok(block, n_block))
1569 /* Convert LBA to CHS */
1570 track = (u32)block / dev->sectors;
1571 cyl = track / dev->heads;
1572 head = track % dev->heads;
1573 sect = (u32)block % dev->sectors + 1;
1575 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1576 (u32)block, track, cyl, head, sect);
1578 /* Check whether the converted CHS can fit.
1582 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1585 tf->command = ATA_CMD_VERIFY;
1586 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1589 tf->lbah = cyl >> 8;
1596 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1597 /* "Invalid field in cbd" */
1601 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1602 /* "Logical Block Address out of range" */
1606 scmd->result = SAM_STAT_GOOD;
1611 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1612 * @qc: Storage for translated ATA taskfile
1614 * Converts any of six SCSI read/write commands into the
1615 * ATA counterpart, including starting sector (LBA),
1616 * sector count, and taking into account the device's LBA48
1619 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1620 * %WRITE_16 are currently supported.
1623 * spin_lock_irqsave(host lock)
1626 * Zero on success, non-zero on error.
1628 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1630 struct scsi_cmnd *scmd = qc->scsicmd;
1631 const u8 *cdb = scmd->cmnd;
1632 unsigned int tf_flags = 0;
1637 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1638 tf_flags |= ATA_TFLAG_WRITE;
1640 /* Calculate the SCSI LBA, transfer length and FUA. */
1644 if (unlikely(scmd->cmd_len < 10))
1646 scsi_10_lba_len(cdb, &block, &n_block);
1647 if (unlikely(cdb[1] & (1 << 3)))
1648 tf_flags |= ATA_TFLAG_FUA;
1652 if (unlikely(scmd->cmd_len < 6))
1654 scsi_6_lba_len(cdb, &block, &n_block);
1656 /* for 6-byte r/w commands, transfer length 0
1657 * means 256 blocks of data, not 0 block.
1664 if (unlikely(scmd->cmd_len < 16))
1666 scsi_16_lba_len(cdb, &block, &n_block);
1667 if (unlikely(cdb[1] & (1 << 3)))
1668 tf_flags |= ATA_TFLAG_FUA;
1671 DPRINTK("no-byte command\n");
1675 /* Check and compose ATA command */
1677 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1678 * length 0 means transfer 0 block of data.
1679 * However, for ATA R/W commands, sector count 0 means
1680 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1682 * WARNING: one or two older ATA drives treat 0 as 0...
1686 qc->flags |= ATA_QCFLAG_IO;
1687 qc->nbytes = n_block * scmd->device->sector_size;
1689 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1691 if (likely(rc == 0))
1696 /* treat all other errors as -EINVAL, fall through */
1698 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1699 /* "Invalid field in cbd" */
1703 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1704 /* "Logical Block Address out of range" */
1708 scmd->result = SAM_STAT_GOOD;
1712 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1714 struct ata_port *ap = qc->ap;
1715 struct scsi_cmnd *cmd = qc->scsicmd;
1716 u8 *cdb = cmd->cmnd;
1717 int need_sense = (qc->err_mask != 0);
1719 /* For ATA pass thru (SAT) commands, generate a sense block if
1720 * user mandated it or if there's an error. Note that if we
1721 * generate because the user forced us to, a check condition
1722 * is generated and the ATA register values are returned
1723 * whether the command completed successfully or not. If there
1724 * was no error, SK, ASC and ASCQ will all be zero.
1726 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1727 ((cdb[2] & 0x20) || need_sense)) {
1728 ata_gen_passthru_sense(qc);
1731 cmd->result = SAM_STAT_GOOD;
1733 /* TODO: decide which descriptor format to use
1734 * for 48b LBA devices and call that here
1735 * instead of the fixed desc, which is only
1736 * good for smaller LBA (and maybe CHS?)
1739 ata_gen_ata_sense(qc);
1743 if (need_sense && !ap->ops->error_handler)
1744 ata_dump_status(ap->print_id, &qc->result_tf);
1752 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1753 * @dev: ATA device to which the command is addressed
1754 * @cmd: SCSI command to execute
1755 * @done: SCSI command completion function
1756 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1758 * Our ->queuecommand() function has decided that the SCSI
1759 * command issued can be directly translated into an ATA
1760 * command, rather than handled internally.
1762 * This function sets up an ata_queued_cmd structure for the
1763 * SCSI command, and sends that ata_queued_cmd to the hardware.
1765 * The xlat_func argument (actor) returns 0 if ready to execute
1766 * ATA command, else 1 to finish translation. If 1 is returned
1767 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1768 * to be set reflecting an error condition or clean (early)
1772 * spin_lock_irqsave(host lock)
1775 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1776 * needs to be deferred.
1778 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1779 void (*done)(struct scsi_cmnd *),
1780 ata_xlat_func_t xlat_func)
1782 struct ata_port *ap = dev->link->ap;
1783 struct ata_queued_cmd *qc;
1788 qc = ata_scsi_qc_new(dev, cmd, done);
1792 /* data is present; dma-map it */
1793 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1794 cmd->sc_data_direction == DMA_TO_DEVICE) {
1795 if (unlikely(scsi_bufflen(cmd) < 1)) {
1796 ata_dev_printk(dev, KERN_WARNING,
1797 "WARNING: zero len r/w req\n");
1801 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1803 qc->dma_dir = cmd->sc_data_direction;
1806 qc->complete_fn = ata_scsi_qc_complete;
1811 if (ap->ops->qc_defer) {
1812 if ((rc = ap->ops->qc_defer(qc)))
1816 /* select device, send command to hardware */
1825 DPRINTK("EXIT - early finish (good or error)\n");
1830 cmd->result = (DID_ERROR << 16);
1833 DPRINTK("EXIT - internal\n");
1838 DPRINTK("EXIT - defer\n");
1839 if (rc == ATA_DEFER_LINK)
1840 return SCSI_MLQUEUE_DEVICE_BUSY;
1842 return SCSI_MLQUEUE_HOST_BUSY;
1846 * ata_scsi_rbuf_get - Map response buffer.
1847 * @cmd: SCSI command containing buffer to be mapped.
1848 * @flags: unsigned long variable to store irq enable status
1849 * @copy_in: copy in from user buffer
1851 * Prepare buffer for simulated SCSI commands.
1854 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1857 * Pointer to response buffer.
1859 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1860 unsigned long *flags)
1862 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1864 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1866 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1867 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1868 return ata_scsi_rbuf;
1872 * ata_scsi_rbuf_put - Unmap response buffer.
1873 * @cmd: SCSI command containing buffer to be unmapped.
1874 * @copy_out: copy out result
1875 * @flags: @flags passed to ata_scsi_rbuf_get()
1877 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1878 * @copy_back is true.
1881 * Unlocks ata_scsi_rbuf_lock.
1883 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1884 unsigned long *flags)
1887 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1888 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1889 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1893 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1894 * @args: device IDENTIFY data / SCSI command of interest.
1895 * @actor: Callback hook for desired SCSI command simulator
1897 * Takes care of the hard work of simulating a SCSI command...
1898 * Mapping the response buffer, calling the command's handler,
1899 * and handling the handler's return value. This return value
1900 * indicates whether the handler wishes the SCSI command to be
1901 * completed successfully (0), or not (in which case cmd->result
1902 * and sense buffer are assumed to be set).
1905 * spin_lock_irqsave(host lock)
1907 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1908 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1912 struct scsi_cmnd *cmd = args->cmd;
1913 unsigned long flags;
1915 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1916 rc = actor(args, rbuf);
1917 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1920 cmd->result = SAM_STAT_GOOD;
1925 * ata_scsiop_inq_std - Simulate INQUIRY command
1926 * @args: device IDENTIFY data / SCSI command of interest.
1927 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1929 * Returns standard device identification data associated
1930 * with non-VPD INQUIRY command output.
1933 * spin_lock_irqsave(host lock)
1935 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1937 const u8 versions[] = {
1938 0x60, /* SAM-3 (no version claimed) */
1941 0x20, /* SBC-2 (no version claimed) */
1944 0x60 /* SPC-3 (no version claimed) */
1949 0x5, /* claim SPC-3 version compatibility */
1956 /* set scsi removeable (RMB) bit per ata bit */
1957 if (ata_id_removeable(args->id))
1960 memcpy(rbuf, hdr, sizeof(hdr));
1961 memcpy(&rbuf[8], "ATA ", 8);
1962 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1963 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1965 if (rbuf[32] == 0 || rbuf[32] == ' ')
1966 memcpy(&rbuf[32], "n/a ", 4);
1968 memcpy(rbuf + 59, versions, sizeof(versions));
1974 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1975 * @args: device IDENTIFY data / SCSI command of interest.
1976 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1978 * Returns list of inquiry VPD pages available.
1981 * spin_lock_irqsave(host lock)
1983 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1985 const u8 pages[] = {
1986 0x00, /* page 0x00, this page */
1987 0x80, /* page 0x80, unit serial no page */
1988 0x83, /* page 0x83, device ident page */
1989 0x89, /* page 0x89, ata info page */
1990 0xb0, /* page 0xb0, block limits page */
1991 0xb1, /* page 0xb1, block device characteristics page */
1994 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1995 memcpy(rbuf + 4, pages, sizeof(pages));
2000 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2001 * @args: device IDENTIFY data / SCSI command of interest.
2002 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2004 * Returns ATA device serial number.
2007 * spin_lock_irqsave(host lock)
2009 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2013 0x80, /* this page code */
2015 ATA_ID_SERNO_LEN, /* page len */
2018 memcpy(rbuf, hdr, sizeof(hdr));
2019 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2020 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2025 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2026 * @args: device IDENTIFY data / SCSI command of interest.
2027 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2029 * Yields two logical unit device identification designators:
2030 * - vendor specific ASCII containing the ATA serial number
2031 * - SAT defined "t10 vendor id based" containing ASCII vendor
2032 * name ("ATA "), model and serial numbers.
2035 * spin_lock_irqsave(host lock)
2037 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2039 const int sat_model_serial_desc_len = 68;
2042 rbuf[1] = 0x83; /* this page code */
2045 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2047 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2049 ata_id_string(args->id, (unsigned char *) rbuf + num,
2050 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2051 num += ATA_ID_SERNO_LEN;
2053 /* SAT defined lu model and serial numbers descriptor */
2054 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2057 rbuf[num + 3] = sat_model_serial_desc_len;
2059 memcpy(rbuf + num, "ATA ", 8);
2061 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2063 num += ATA_ID_PROD_LEN;
2064 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2066 num += ATA_ID_SERNO_LEN;
2068 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2073 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2074 * @args: device IDENTIFY data / SCSI command of interest.
2075 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2077 * Yields SAT-specified ATA VPD page.
2080 * spin_lock_irqsave(host lock)
2082 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2084 struct ata_taskfile tf;
2086 memset(&tf, 0, sizeof(tf));
2088 rbuf[1] = 0x89; /* our page code */
2089 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2090 rbuf[3] = (0x238 & 0xff);
2092 memcpy(&rbuf[8], "linux ", 8);
2093 memcpy(&rbuf[16], "libata ", 16);
2094 memcpy(&rbuf[32], DRV_VERSION, 4);
2095 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2097 /* we don't store the ATA device signature, so we fake it */
2099 tf.command = ATA_DRDY; /* really, this is Status reg */
2103 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2104 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2106 rbuf[56] = ATA_CMD_ID_ATA;
2108 memcpy(&rbuf[60], &args->id[0], 512);
2112 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2117 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2120 * Optimal transfer length granularity.
2122 * This is always one physical block, but for disks with a smaller
2123 * logical than physical sector size we need to figure out what the
2126 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2127 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2130 * Optimal unmap granularity.
2132 * The ATA spec doesn't even know about a granularity or alignment
2133 * for the TRIM command. We can leave away most of the unmap related
2134 * VPD page entries, but we have specifify a granularity to signal
2135 * that we support some form of unmap - in thise case via WRITE SAME
2136 * with the unmap bit set.
2138 if (ata_id_has_trim(args->id)) {
2139 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
2140 put_unaligned_be32(1, &rbuf[28]);
2146 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2148 int form_factor = ata_id_form_factor(args->id);
2149 int media_rotation_rate = ata_id_rotation_rate(args->id);
2153 rbuf[4] = media_rotation_rate >> 8;
2154 rbuf[5] = media_rotation_rate;
2155 rbuf[7] = form_factor;
2161 * ata_scsiop_noop - Command handler that simply returns success.
2162 * @args: device IDENTIFY data / SCSI command of interest.
2163 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2165 * No operation. Simply returns success to caller, to indicate
2166 * that the caller should successfully complete this SCSI command.
2169 * spin_lock_irqsave(host lock)
2171 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2178 * ata_msense_caching - Simulate MODE SENSE caching info page
2179 * @id: device IDENTIFY data
2180 * @buf: output buffer
2182 * Generate a caching info page, which conditionally indicates
2183 * write caching to the SCSI layer, depending on device
2189 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2191 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2192 if (ata_id_wcache_enabled(id))
2193 buf[2] |= (1 << 2); /* write cache enable */
2194 if (!ata_id_rahead_enabled(id))
2195 buf[12] |= (1 << 5); /* disable read ahead */
2196 return sizeof(def_cache_mpage);
2200 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2201 * @buf: output buffer
2203 * Generate a generic MODE SENSE control mode page.
2208 static unsigned int ata_msense_ctl_mode(u8 *buf)
2210 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2211 return sizeof(def_control_mpage);
2215 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2216 * @buf: output buffer
2218 * Generate a generic MODE SENSE r/w error recovery page.
2223 static unsigned int ata_msense_rw_recovery(u8 *buf)
2225 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2226 return sizeof(def_rw_recovery_mpage);
2230 * We can turn this into a real blacklist if it's needed, for now just
2231 * blacklist any Maxtor BANC1G10 revision firmware
2233 static int ata_dev_supports_fua(u16 *id)
2235 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2239 if (!ata_id_has_fua(id))
2242 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2243 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2245 if (strcmp(model, "Maxtor"))
2247 if (strcmp(fw, "BANC1G10"))
2250 return 0; /* blacklisted */
2254 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2255 * @args: device IDENTIFY data / SCSI command of interest.
2256 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2258 * Simulate MODE SENSE commands. Assume this is invoked for direct
2259 * access devices (e.g. disks) only. There should be no block
2260 * descriptor for other device types.
2263 * spin_lock_irqsave(host lock)
2265 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2267 struct ata_device *dev = args->dev;
2268 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2269 const u8 sat_blk_desc[] = {
2270 0, 0, 0, 0, /* number of blocks: sat unspecified */
2272 0, 0x2, 0x0 /* block length: 512 bytes */
2275 unsigned int ebd, page_control, six_byte;
2280 six_byte = (scsicmd[0] == MODE_SENSE);
2281 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2283 * LLBA bit in msense(10) ignored (compliant)
2286 page_control = scsicmd[2] >> 6;
2287 switch (page_control) {
2288 case 0: /* current */
2289 break; /* supported */
2291 goto saving_not_supp;
2292 case 1: /* changeable */
2293 case 2: /* defaults */
2299 p += 4 + (ebd ? 8 : 0);
2301 p += 8 + (ebd ? 8 : 0);
2303 pg = scsicmd[2] & 0x3f;
2306 * No mode subpages supported (yet) but asking for _all_
2307 * subpages may be valid
2309 if (spg && (spg != ALL_SUB_MPAGES))
2313 case RW_RECOVERY_MPAGE:
2314 p += ata_msense_rw_recovery(p);
2318 p += ata_msense_caching(args->id, p);
2322 p += ata_msense_ctl_mode(p);
2326 p += ata_msense_rw_recovery(p);
2327 p += ata_msense_caching(args->id, p);
2328 p += ata_msense_ctl_mode(p);
2331 default: /* invalid page code */
2336 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2337 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2341 rbuf[0] = p - rbuf - 1;
2344 rbuf[3] = sizeof(sat_blk_desc);
2345 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2348 unsigned int output_len = p - rbuf - 2;
2350 rbuf[0] = output_len >> 8;
2351 rbuf[1] = output_len;
2354 rbuf[7] = sizeof(sat_blk_desc);
2355 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2361 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2362 /* "Invalid field in cbd" */
2366 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2367 /* "Saving parameters not supported" */
2372 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2373 * @args: device IDENTIFY data / SCSI command of interest.
2374 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2376 * Simulate READ CAPACITY commands.
2381 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2383 struct ata_device *dev = args->dev;
2384 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2385 u32 sector_size; /* physical sector size in bytes */
2389 sector_size = ata_id_logical_sector_size(dev->id);
2390 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2391 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2395 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2396 if (last_lba >= 0xffffffffULL)
2397 last_lba = 0xffffffff;
2399 /* sector count, 32-bit */
2400 rbuf[0] = last_lba >> (8 * 3);
2401 rbuf[1] = last_lba >> (8 * 2);
2402 rbuf[2] = last_lba >> (8 * 1);
2406 rbuf[4] = sector_size >> (8 * 3);
2407 rbuf[5] = sector_size >> (8 * 2);
2408 rbuf[6] = sector_size >> (8 * 1);
2409 rbuf[7] = sector_size;
2411 /* sector count, 64-bit */
2412 rbuf[0] = last_lba >> (8 * 7);
2413 rbuf[1] = last_lba >> (8 * 6);
2414 rbuf[2] = last_lba >> (8 * 5);
2415 rbuf[3] = last_lba >> (8 * 4);
2416 rbuf[4] = last_lba >> (8 * 3);
2417 rbuf[5] = last_lba >> (8 * 2);
2418 rbuf[6] = last_lba >> (8 * 1);
2422 rbuf[ 8] = sector_size >> (8 * 3);
2423 rbuf[ 9] = sector_size >> (8 * 2);
2424 rbuf[10] = sector_size >> (8 * 1);
2425 rbuf[11] = sector_size;
2428 rbuf[13] = log2_per_phys;
2429 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2430 rbuf[15] = lowest_aligned;
2432 if (ata_id_has_trim(args->id)) {
2433 rbuf[14] |= 0x80; /* TPE */
2435 if (ata_id_has_zero_after_trim(args->id))
2436 rbuf[14] |= 0x40; /* TPRZ */
2444 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2445 * @args: device IDENTIFY data / SCSI command of interest.
2446 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2448 * Simulate REPORT LUNS command.
2451 * spin_lock_irqsave(host lock)
2453 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2456 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2461 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2463 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2464 /* FIXME: not quite right; we don't want the
2465 * translation of taskfile registers into
2466 * a sense descriptors, since that's only
2467 * correct for ATA, not ATAPI
2469 ata_gen_passthru_sense(qc);
2472 qc->scsidone(qc->scsicmd);
2476 /* is it pointless to prefer PIO for "safety reasons"? */
2477 static inline int ata_pio_use_silly(struct ata_port *ap)
2479 return (ap->flags & ATA_FLAG_PIO_DMA);
2482 static void atapi_request_sense(struct ata_queued_cmd *qc)
2484 struct ata_port *ap = qc->ap;
2485 struct scsi_cmnd *cmd = qc->scsicmd;
2487 DPRINTK("ATAPI request sense\n");
2489 /* FIXME: is this needed? */
2490 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2492 #ifdef CONFIG_ATA_SFF
2493 if (ap->ops->sff_tf_read)
2494 ap->ops->sff_tf_read(ap, &qc->tf);
2497 /* fill these in, for the case where they are -not- overwritten */
2498 cmd->sense_buffer[0] = 0x70;
2499 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2503 /* setup sg table and init transfer direction */
2504 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2505 ata_sg_init(qc, &qc->sgent, 1);
2506 qc->dma_dir = DMA_FROM_DEVICE;
2508 memset(&qc->cdb, 0, qc->dev->cdb_len);
2509 qc->cdb[0] = REQUEST_SENSE;
2510 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2512 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2513 qc->tf.command = ATA_CMD_PACKET;
2515 if (ata_pio_use_silly(ap)) {
2516 qc->tf.protocol = ATAPI_PROT_DMA;
2517 qc->tf.feature |= ATAPI_PKT_DMA;
2519 qc->tf.protocol = ATAPI_PROT_PIO;
2520 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2523 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2525 qc->complete_fn = atapi_sense_complete;
2532 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2534 struct scsi_cmnd *cmd = qc->scsicmd;
2535 unsigned int err_mask = qc->err_mask;
2537 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2539 /* handle completion from new EH */
2540 if (unlikely(qc->ap->ops->error_handler &&
2541 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2543 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2544 /* FIXME: not quite right; we don't want the
2545 * translation of taskfile registers into a
2546 * sense descriptors, since that's only
2547 * correct for ATA, not ATAPI
2549 ata_gen_passthru_sense(qc);
2552 /* SCSI EH automatically locks door if sdev->locked is
2553 * set. Sometimes door lock request continues to
2554 * fail, for example, when no media is present. This
2555 * creates a loop - SCSI EH issues door lock which
2556 * fails and gets invoked again to acquire sense data
2557 * for the failed command.
2559 * If door lock fails, always clear sdev->locked to
2560 * avoid this infinite loop.
2562 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2563 qc->dev->sdev->locked = 0;
2565 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2571 /* successful completion or old EH failure path */
2572 if (unlikely(err_mask & AC_ERR_DEV)) {
2573 cmd->result = SAM_STAT_CHECK_CONDITION;
2574 atapi_request_sense(qc);
2576 } else if (unlikely(err_mask)) {
2577 /* FIXME: not quite right; we don't want the
2578 * translation of taskfile registers into
2579 * a sense descriptors, since that's only
2580 * correct for ATA, not ATAPI
2582 ata_gen_passthru_sense(qc);
2584 u8 *scsicmd = cmd->cmnd;
2586 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2587 unsigned long flags;
2590 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2592 /* ATAPI devices typically report zero for their SCSI version,
2593 * and sometimes deviate from the spec WRT response data
2594 * format. If SCSI version is reported as zero like normal,
2595 * then we make the following fixups: 1) Fake MMC-5 version,
2596 * to indicate to the Linux scsi midlayer this is a modern
2597 * device. 2) Ensure response data format / ATAPI information
2598 * are always correct.
2605 ata_scsi_rbuf_put(cmd, true, &flags);
2608 cmd->result = SAM_STAT_GOOD;
2615 * atapi_xlat - Initialize PACKET taskfile
2616 * @qc: command structure to be initialized
2619 * spin_lock_irqsave(host lock)
2622 * Zero on success, non-zero on failure.
2624 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2626 struct scsi_cmnd *scmd = qc->scsicmd;
2627 struct ata_device *dev = qc->dev;
2628 int nodata = (scmd->sc_data_direction == DMA_NONE);
2629 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2630 unsigned int nbytes;
2632 memset(qc->cdb, 0, dev->cdb_len);
2633 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2635 qc->complete_fn = atapi_qc_complete;
2637 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2638 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2639 qc->tf.flags |= ATA_TFLAG_WRITE;
2640 DPRINTK("direction: write\n");
2643 qc->tf.command = ATA_CMD_PACKET;
2644 ata_qc_set_pc_nbytes(qc);
2646 /* check whether ATAPI DMA is safe */
2647 if (!nodata && !using_pio && atapi_check_dma(qc))
2650 /* Some controller variants snoop this value for Packet
2651 * transfers to do state machine and FIFO management. Thus we
2652 * want to set it properly, and for DMA where it is
2653 * effectively meaningless.
2655 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2657 /* Most ATAPI devices which honor transfer chunk size don't
2658 * behave according to the spec when odd chunk size which
2659 * matches the transfer length is specified. If the number of
2660 * bytes to transfer is 2n+1. According to the spec, what
2661 * should happen is to indicate that 2n+1 is going to be
2662 * transferred and transfer 2n+2 bytes where the last byte is
2665 * In practice, this doesn't happen. ATAPI devices first
2666 * indicate and transfer 2n bytes and then indicate and
2667 * transfer 2 bytes where the last byte is padding.
2669 * This inconsistency confuses several controllers which
2670 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2671 * These controllers use actual number of transferred bytes to
2672 * update DMA poitner and transfer of 4n+2 bytes make those
2673 * controller push DMA pointer by 4n+4 bytes because SATA data
2674 * FISes are aligned to 4 bytes. This causes data corruption
2675 * and buffer overrun.
2677 * Always setting nbytes to even number solves this problem
2678 * because then ATAPI devices don't have to split data at 2n
2684 qc->tf.lbam = (nbytes & 0xFF);
2685 qc->tf.lbah = (nbytes >> 8);
2688 qc->tf.protocol = ATAPI_PROT_NODATA;
2690 qc->tf.protocol = ATAPI_PROT_PIO;
2693 qc->tf.protocol = ATAPI_PROT_DMA;
2694 qc->tf.feature |= ATAPI_PKT_DMA;
2696 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2697 (scmd->sc_data_direction != DMA_TO_DEVICE))
2698 /* some SATA bridges need us to indicate data xfer direction */
2699 qc->tf.feature |= ATAPI_DMADIR;
2703 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2704 as ATAPI tape drives don't get this right otherwise */
2708 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2710 if (!sata_pmp_attached(ap)) {
2711 if (likely(devno < ata_link_max_devices(&ap->link)))
2712 return &ap->link.device[devno];
2714 if (likely(devno < ap->nr_pmp_links))
2715 return &ap->pmp_link[devno].device[0];
2721 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2722 const struct scsi_device *scsidev)
2726 /* skip commands not addressed to targets we simulate */
2727 if (!sata_pmp_attached(ap)) {
2728 if (unlikely(scsidev->channel || scsidev->lun))
2730 devno = scsidev->id;
2732 if (unlikely(scsidev->id || scsidev->lun))
2734 devno = scsidev->channel;
2737 return ata_find_dev(ap, devno);
2741 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2742 * @ap: ATA port to which the device is attached
2743 * @scsidev: SCSI device from which we derive the ATA device
2745 * Given various information provided in struct scsi_cmnd,
2746 * map that onto an ATA bus, and using that mapping
2747 * determine which ata_device is associated with the
2748 * SCSI command to be sent.
2751 * spin_lock_irqsave(host lock)
2754 * Associated ATA device, or %NULL if not found.
2756 static struct ata_device *
2757 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2759 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2761 if (unlikely(!dev || !ata_dev_enabled(dev)))
2768 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2769 * @byte1: Byte 1 from pass-thru CDB.
2772 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2775 ata_scsi_map_proto(u8 byte1)
2777 switch((byte1 & 0x1e) >> 1) {
2778 case 3: /* Non-data */
2779 return ATA_PROT_NODATA;
2782 case 10: /* UDMA Data-in */
2783 case 11: /* UDMA Data-Out */
2784 return ATA_PROT_DMA;
2786 case 4: /* PIO Data-in */
2787 case 5: /* PIO Data-out */
2788 return ATA_PROT_PIO;
2790 case 0: /* Hard Reset */
2792 case 8: /* Device Diagnostic */
2793 case 9: /* Device Reset */
2794 case 7: /* DMA Queued */
2795 case 12: /* FPDMA */
2796 case 15: /* Return Response Info */
2797 default: /* Reserved */
2801 return ATA_PROT_UNKNOWN;
2805 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2806 * @qc: command structure to be initialized
2808 * Handles either 12 or 16-byte versions of the CDB.
2811 * Zero on success, non-zero on failure.
2813 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2815 struct ata_taskfile *tf = &(qc->tf);
2816 struct scsi_cmnd *scmd = qc->scsicmd;
2817 struct ata_device *dev = qc->dev;
2818 const u8 *cdb = scmd->cmnd;
2820 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2824 * 12 and 16 byte CDBs use different offsets to
2825 * provide the various register values.
2827 if (cdb[0] == ATA_16) {
2829 * 16-byte CDB - may contain extended commands.
2831 * If that is the case, copy the upper byte register values.
2833 if (cdb[1] & 0x01) {
2834 tf->hob_feature = cdb[3];
2835 tf->hob_nsect = cdb[5];
2836 tf->hob_lbal = cdb[7];
2837 tf->hob_lbam = cdb[9];
2838 tf->hob_lbah = cdb[11];
2839 tf->flags |= ATA_TFLAG_LBA48;
2841 tf->flags &= ~ATA_TFLAG_LBA48;
2844 * Always copy low byte, device and command registers.
2846 tf->feature = cdb[4];
2851 tf->device = cdb[13];
2852 tf->command = cdb[14];
2855 * 12-byte CDB - incapable of extended commands.
2857 tf->flags &= ~ATA_TFLAG_LBA48;
2859 tf->feature = cdb[3];
2864 tf->device = cdb[8];
2865 tf->command = cdb[9];
2868 /* enforce correct master/slave bit */
2869 tf->device = dev->devno ?
2870 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2872 switch (tf->command) {
2873 /* READ/WRITE LONG use a non-standard sect_size */
2874 case ATA_CMD_READ_LONG:
2875 case ATA_CMD_READ_LONG_ONCE:
2876 case ATA_CMD_WRITE_LONG:
2877 case ATA_CMD_WRITE_LONG_ONCE:
2878 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2880 qc->sect_size = scsi_bufflen(scmd);
2883 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2884 case ATA_CMD_CFA_WRITE_NE:
2885 case ATA_CMD_CFA_TRANS_SECT:
2886 case ATA_CMD_CFA_WRITE_MULT_NE:
2887 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2889 case ATA_CMD_READ_EXT:
2890 case ATA_CMD_READ_QUEUED:
2891 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2892 case ATA_CMD_FPDMA_READ:
2893 case ATA_CMD_READ_MULTI:
2894 case ATA_CMD_READ_MULTI_EXT:
2895 case ATA_CMD_PIO_READ:
2896 case ATA_CMD_PIO_READ_EXT:
2897 case ATA_CMD_READ_STREAM_DMA_EXT:
2898 case ATA_CMD_READ_STREAM_EXT:
2899 case ATA_CMD_VERIFY:
2900 case ATA_CMD_VERIFY_EXT:
2902 case ATA_CMD_WRITE_EXT:
2903 case ATA_CMD_WRITE_FUA_EXT:
2904 case ATA_CMD_WRITE_QUEUED:
2905 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2906 case ATA_CMD_FPDMA_WRITE:
2907 case ATA_CMD_WRITE_MULTI:
2908 case ATA_CMD_WRITE_MULTI_EXT:
2909 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2910 case ATA_CMD_PIO_WRITE:
2911 case ATA_CMD_PIO_WRITE_EXT:
2912 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2913 case ATA_CMD_WRITE_STREAM_EXT:
2914 qc->sect_size = scmd->device->sector_size;
2917 /* Everything else uses 512 byte "sectors" */
2919 qc->sect_size = ATA_SECT_SIZE;
2923 * Set flags so that all registers will be written, pass on
2924 * write indication (used for PIO/DMA setup), result TF is
2925 * copied back and we don't whine too much about its failure.
2927 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2928 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2929 tf->flags |= ATA_TFLAG_WRITE;
2931 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2934 * Set transfer length.
2936 * TODO: find out if we need to do more here to
2937 * cover scatter/gather case.
2939 ata_qc_set_pc_nbytes(qc);
2941 /* We may not issue DMA commands if no DMA mode is set */
2942 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2945 /* sanity check for pio multi commands */
2946 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2949 if (is_multi_taskfile(tf)) {
2950 unsigned int multi_count = 1 << (cdb[1] >> 5);
2952 /* compare the passed through multi_count
2953 * with the cached multi_count of libata
2955 if (multi_count != dev->multi_count)
2956 ata_dev_printk(dev, KERN_WARNING,
2957 "invalid multi_count %u ignored\n",
2962 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2963 * SET_FEATURES - XFER MODE must be preceded/succeeded
2964 * by an update to hardware-specific registers for each
2965 * controller (i.e. the reason for ->set_piomode(),
2966 * ->set_dmamode(), and ->post_set_mode() hooks).
2968 if (tf->command == ATA_CMD_SET_FEATURES &&
2969 tf->feature == SETFEATURES_XFER)
2973 * Filter TPM commands by default. These provide an
2974 * essentially uncontrolled encrypted "back door" between
2975 * applications and the disk. Set libata.allow_tpm=1 if you
2976 * have a real reason for wanting to use them. This ensures
2977 * that installed software cannot easily mess stuff up without
2978 * user intent. DVR type users will probably ship with this enabled
2979 * for movie content management.
2981 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2982 * for this and should do in future but that it is not sufficient as
2983 * DCS is an optional feature set. Thus we also do the software filter
2984 * so that we comply with the TC consortium stated goal that the user
2985 * can turn off TC features of their system.
2987 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2993 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2994 /* "Invalid field in cdb" */
2998 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3000 struct ata_taskfile *tf = &qc->tf;
3001 struct scsi_cmnd *scmd = qc->scsicmd;
3002 struct ata_device *dev = qc->dev;
3003 const u8 *cdb = scmd->cmnd;
3009 /* we may not issue DMA commands if no DMA mode is set */
3010 if (unlikely(!dev->dma_mode))
3013 if (unlikely(scmd->cmd_len < 16))
3015 scsi_16_lba_len(cdb, &block, &n_block);
3017 /* for now we only support WRITE SAME with the unmap bit set */
3018 if (unlikely(!(cdb[1] & 0x8)))
3022 * WRITE SAME always has a sector sized buffer as payload, this
3023 * should never be a multiple entry S/G list.
3025 if (!scsi_sg_count(scmd))
3028 buf = page_address(sg_page(scsi_sglist(scmd)));
3029 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3031 tf->protocol = ATA_PROT_DMA;
3032 tf->hob_feature = 0;
3033 tf->feature = ATA_DSM_TRIM;
3034 tf->hob_nsect = (size / 512) >> 8;
3035 tf->nsect = size / 512;
3036 tf->command = ATA_CMD_DSM;
3037 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3040 ata_qc_set_pc_nbytes(qc);
3045 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3046 /* "Invalid field in cdb" */
3051 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3053 * @cmd: SCSI command opcode to consider
3055 * Look up the SCSI command given, and determine whether the
3056 * SCSI command is to be translated or simulated.
3059 * Pointer to translation function if possible, %NULL if not.
3062 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3072 return ata_scsi_rw_xlat;
3075 return ata_scsi_write_same_xlat;
3077 case SYNCHRONIZE_CACHE:
3078 if (ata_try_flush_cache(dev))
3079 return ata_scsi_flush_xlat;
3084 return ata_scsi_verify_xlat;
3088 return ata_scsi_pass_thru;
3091 return ata_scsi_start_stop_xlat;
3098 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3099 * @ap: ATA port to which the command was being sent
3100 * @cmd: SCSI command to dump
3102 * Prints the contents of a SCSI command via printk().
3105 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3106 struct scsi_cmnd *cmd)
3109 struct scsi_device *scsidev = cmd->device;
3110 u8 *scsicmd = cmd->cmnd;
3112 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3114 scsidev->channel, scsidev->id, scsidev->lun,
3115 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3116 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3121 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3122 void (*done)(struct scsi_cmnd *),
3123 struct ata_device *dev)
3125 u8 scsi_op = scmd->cmnd[0];
3126 ata_xlat_func_t xlat_func;
3129 if (dev->class == ATA_DEV_ATA) {
3130 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3133 xlat_func = ata_get_xlat_func(dev, scsi_op);
3135 if (unlikely(!scmd->cmd_len))
3139 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3140 /* relay SCSI command to ATAPI device */
3141 int len = COMMAND_SIZE(scsi_op);
3142 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3145 xlat_func = atapi_xlat;
3147 /* ATA_16 passthru, treat as an ATA command */
3148 if (unlikely(scmd->cmd_len > 16))
3151 xlat_func = ata_get_xlat_func(dev, scsi_op);
3156 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3158 ata_scsi_simulate(dev, scmd, done);
3163 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3164 scmd->cmd_len, scsi_op, dev->cdb_len);
3165 scmd->result = DID_ERROR << 16;
3171 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3172 * @cmd: SCSI command to be sent
3173 * @done: Completion function, called when command is complete
3175 * In some cases, this function translates SCSI commands into
3176 * ATA taskfiles, and queues the taskfiles to be sent to
3177 * hardware. In other cases, this function simulates a
3178 * SCSI device by evaluating and responding to certain
3179 * SCSI commands. This creates the overall effect of
3180 * ATA and ATAPI devices appearing as SCSI devices.
3183 * Releases scsi-layer-held lock, and obtains host lock.
3186 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3189 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3191 struct ata_port *ap;
3192 struct ata_device *dev;
3193 struct scsi_device *scsidev = cmd->device;
3194 struct Scsi_Host *shost = scsidev->host;
3197 ap = ata_shost_to_port(shost);
3199 spin_unlock(shost->host_lock);
3200 spin_lock(ap->lock);
3202 ata_scsi_dump_cdb(ap, cmd);
3204 dev = ata_scsi_find_dev(ap, scsidev);
3206 rc = __ata_scsi_queuecmd(cmd, done, dev);
3208 cmd->result = (DID_BAD_TARGET << 16);
3212 spin_unlock(ap->lock);
3213 spin_lock(shost->host_lock);
3218 * ata_scsi_simulate - simulate SCSI command on ATA device
3219 * @dev: the target device
3220 * @cmd: SCSI command being sent to device.
3221 * @done: SCSI command completion function.
3223 * Interprets and directly executes a select list of SCSI commands
3224 * that can be handled internally.
3227 * spin_lock_irqsave(host lock)
3230 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
3231 void (*done)(struct scsi_cmnd *))
3233 struct ata_scsi_args args;
3234 const u8 *scsicmd = cmd->cmnd;
3242 switch(scsicmd[0]) {
3243 /* TODO: worth improving? */
3245 ata_scsi_invalid_field(cmd, done);
3249 if (scsicmd[1] & 2) /* is CmdDt set? */
3250 ata_scsi_invalid_field(cmd, done);
3251 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3252 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3253 else switch (scsicmd[2]) {
3255 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3258 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3261 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3264 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3267 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3270 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3273 ata_scsi_invalid_field(cmd, done);
3280 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3283 case MODE_SELECT: /* unconditionally return */
3284 case MODE_SELECT_10: /* bad-field-in-cdb */
3285 ata_scsi_invalid_field(cmd, done);
3289 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3292 case SERVICE_ACTION_IN:
3293 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3294 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3296 ata_scsi_invalid_field(cmd, done);
3300 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3304 ata_scsi_set_sense(cmd, 0, 0, 0);
3305 cmd->result = (DRIVER_SENSE << 24);
3309 /* if we reach this, then writeback caching is disabled,
3310 * turning this into a no-op.
3312 case SYNCHRONIZE_CACHE:
3315 /* no-op's, complete with success */
3319 case TEST_UNIT_READY:
3320 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3323 case SEND_DIAGNOSTIC:
3324 tmp8 = scsicmd[1] & ~(1 << 3);
3325 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3326 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3328 ata_scsi_invalid_field(cmd, done);
3331 /* all other commands */
3333 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3334 /* "Invalid command operation code" */
3340 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3344 for (i = 0; i < host->n_ports; i++) {
3345 struct ata_port *ap = host->ports[i];
3346 struct Scsi_Host *shost;
3349 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3353 *(struct ata_port **)&shost->hostdata[0] = ap;
3354 ap->scsi_host = shost;
3356 shost->transportt = ata_scsi_transport_template;
3357 shost->unique_id = ap->print_id;
3360 shost->max_channel = 1;
3361 shost->max_cmd_len = 16;
3363 /* Schedule policy is determined by ->qc_defer()
3364 * callback and it needs to see every deferred qc.
3365 * Set host_blocked to 1 to prevent SCSI midlayer from
3366 * automatically deferring requests.
3368 shost->max_host_blocked = 1;
3370 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3378 scsi_host_put(host->ports[i]->scsi_host);
3381 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3383 scsi_remove_host(shost);
3384 scsi_host_put(shost);
3389 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3392 struct ata_device *last_failed_dev = NULL;
3393 struct ata_link *link;
3394 struct ata_device *dev;
3397 ata_for_each_link(link, ap, EDGE) {
3398 ata_for_each_dev(dev, link, ENABLED) {
3399 struct scsi_device *sdev;
3400 int channel = 0, id = 0;
3405 if (ata_is_host_link(link))
3408 channel = link->pmp;
3410 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3412 if (!IS_ERR(sdev)) {
3414 scsi_device_put(sdev);
3421 /* If we scanned while EH was in progress or allocation
3422 * failure occurred, scan would have failed silently. Check
3423 * whether all devices are attached.
3425 ata_for_each_link(link, ap, EDGE) {
3426 ata_for_each_dev(dev, link, ENABLED) {
3435 /* we're missing some SCSI devices */
3437 /* If caller requested synchrnous scan && we've made
3438 * any progress, sleep briefly and repeat.
3440 if (dev != last_failed_dev) {
3442 last_failed_dev = dev;
3446 /* We might be failing to detect boot device, give it
3447 * a few more chances.
3454 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3455 "failed without making any progress,\n"
3456 " switching to async\n");
3459 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3460 round_jiffies_relative(HZ));
3464 * ata_scsi_offline_dev - offline attached SCSI device
3465 * @dev: ATA device to offline attached SCSI device for
3467 * This function is called from ata_eh_hotplug() and responsible
3468 * for taking the SCSI device attached to @dev offline. This
3469 * function is called with host lock which protects dev->sdev
3473 * spin_lock_irqsave(host lock)
3476 * 1 if attached SCSI device exists, 0 otherwise.
3478 int ata_scsi_offline_dev(struct ata_device *dev)
3481 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3488 * ata_scsi_remove_dev - remove attached SCSI device
3489 * @dev: ATA device to remove attached SCSI device for
3491 * This function is called from ata_eh_scsi_hotplug() and
3492 * responsible for removing the SCSI device attached to @dev.
3495 * Kernel thread context (may sleep).
3497 static void ata_scsi_remove_dev(struct ata_device *dev)
3499 struct ata_port *ap = dev->link->ap;
3500 struct scsi_device *sdev;
3501 unsigned long flags;
3503 /* Alas, we need to grab scan_mutex to ensure SCSI device
3504 * state doesn't change underneath us and thus
3505 * scsi_device_get() always succeeds. The mutex locking can
3506 * be removed if there is __scsi_device_get() interface which
3507 * increments reference counts regardless of device state.
3509 mutex_lock(&ap->scsi_host->scan_mutex);
3510 spin_lock_irqsave(ap->lock, flags);
3512 /* clearing dev->sdev is protected by host lock */
3517 /* If user initiated unplug races with us, sdev can go
3518 * away underneath us after the host lock and
3519 * scan_mutex are released. Hold onto it.
3521 if (scsi_device_get(sdev) == 0) {
3522 /* The following ensures the attached sdev is
3523 * offline on return from ata_scsi_offline_dev()
3524 * regardless it wins or loses the race
3525 * against this function.
3527 scsi_device_set_state(sdev, SDEV_OFFLINE);
3534 spin_unlock_irqrestore(ap->lock, flags);
3535 mutex_unlock(&ap->scsi_host->scan_mutex);
3538 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3539 dev_name(&sdev->sdev_gendev));
3541 scsi_remove_device(sdev);
3542 scsi_device_put(sdev);
3546 static void ata_scsi_handle_link_detach(struct ata_link *link)
3548 struct ata_port *ap = link->ap;
3549 struct ata_device *dev;
3551 ata_for_each_dev(dev, link, ALL) {
3552 unsigned long flags;
3554 if (!(dev->flags & ATA_DFLAG_DETACHED))
3557 spin_lock_irqsave(ap->lock, flags);
3558 dev->flags &= ~ATA_DFLAG_DETACHED;
3559 spin_unlock_irqrestore(ap->lock, flags);
3561 ata_scsi_remove_dev(dev);
3566 * ata_scsi_media_change_notify - send media change event
3567 * @dev: Pointer to the disk device with media change event
3569 * Tell the block layer to send a media change notification
3573 * spin_lock_irqsave(host lock)
3575 void ata_scsi_media_change_notify(struct ata_device *dev)
3578 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3583 * ata_scsi_hotplug - SCSI part of hotplug
3584 * @work: Pointer to ATA port to perform SCSI hotplug on
3586 * Perform SCSI part of hotplug. It's executed from a separate
3587 * workqueue after EH completes. This is necessary because SCSI
3588 * hot plugging requires working EH and hot unplugging is
3589 * synchronized with hot plugging with a mutex.
3592 * Kernel thread context (may sleep).
3594 void ata_scsi_hotplug(struct work_struct *work)
3596 struct ata_port *ap =
3597 container_of(work, struct ata_port, hotplug_task.work);
3600 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3601 DPRINTK("ENTER/EXIT - unloading\n");
3606 mutex_lock(&ap->scsi_scan_mutex);
3608 /* Unplug detached devices. We cannot use link iterator here
3609 * because PMP links have to be scanned even if PMP is
3610 * currently not attached. Iterate manually.
3612 ata_scsi_handle_link_detach(&ap->link);
3614 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3615 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3617 /* scan for new ones */
3618 ata_scsi_scan_host(ap, 0);
3620 mutex_unlock(&ap->scsi_scan_mutex);
3625 * ata_scsi_user_scan - indication for user-initiated bus scan
3626 * @shost: SCSI host to scan
3627 * @channel: Channel to scan
3631 * This function is called when user explicitly requests bus
3632 * scan. Set probe pending flag and invoke EH.
3635 * SCSI layer (we don't care)
3640 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3641 unsigned int id, unsigned int lun)
3643 struct ata_port *ap = ata_shost_to_port(shost);
3644 unsigned long flags;
3647 if (!ap->ops->error_handler)
3650 if (lun != SCAN_WILD_CARD && lun)
3653 if (!sata_pmp_attached(ap)) {
3654 if (channel != SCAN_WILD_CARD && channel)
3658 if (id != SCAN_WILD_CARD && id)
3663 spin_lock_irqsave(ap->lock, flags);
3665 if (devno == SCAN_WILD_CARD) {
3666 struct ata_link *link;
3668 ata_for_each_link(link, ap, EDGE) {
3669 struct ata_eh_info *ehi = &link->eh_info;
3670 ehi->probe_mask |= ATA_ALL_DEVICES;
3671 ehi->action |= ATA_EH_RESET;
3674 struct ata_device *dev = ata_find_dev(ap, devno);
3677 struct ata_eh_info *ehi = &dev->link->eh_info;
3678 ehi->probe_mask |= 1 << dev->devno;
3679 ehi->action |= ATA_EH_RESET;
3685 ata_port_schedule_eh(ap);
3686 spin_unlock_irqrestore(ap->lock, flags);
3687 ata_port_wait_eh(ap);
3689 spin_unlock_irqrestore(ap->lock, flags);
3695 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3696 * @work: Pointer to ATA port to perform scsi_rescan_device()
3698 * After ATA pass thru (SAT) commands are executed successfully,
3699 * libata need to propagate the changes to SCSI layer.
3702 * Kernel thread context (may sleep).
3704 void ata_scsi_dev_rescan(struct work_struct *work)
3706 struct ata_port *ap =
3707 container_of(work, struct ata_port, scsi_rescan_task);
3708 struct ata_link *link;
3709 struct ata_device *dev;
3710 unsigned long flags;
3712 mutex_lock(&ap->scsi_scan_mutex);
3713 spin_lock_irqsave(ap->lock, flags);
3715 ata_for_each_link(link, ap, EDGE) {
3716 ata_for_each_dev(dev, link, ENABLED) {
3717 struct scsi_device *sdev = dev->sdev;
3721 if (scsi_device_get(sdev))
3724 spin_unlock_irqrestore(ap->lock, flags);
3725 scsi_rescan_device(&(sdev->sdev_gendev));
3726 scsi_device_put(sdev);
3727 spin_lock_irqsave(ap->lock, flags);
3731 spin_unlock_irqrestore(ap->lock, flags);
3732 mutex_unlock(&ap->scsi_scan_mutex);
3736 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3737 * @host: ATA host container for all SAS ports
3738 * @port_info: Information from low-level host driver
3739 * @shost: SCSI host that the scsi device is attached to
3742 * PCI/etc. bus probe sem.
3745 * ata_port pointer on success / NULL on failure.
3748 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3749 struct ata_port_info *port_info,
3750 struct Scsi_Host *shost)
3752 struct ata_port *ap;
3754 ap = ata_port_alloc(host);
3759 ap->lock = shost->host_lock;
3760 ap->pio_mask = port_info->pio_mask;
3761 ap->mwdma_mask = port_info->mwdma_mask;
3762 ap->udma_mask = port_info->udma_mask;
3763 ap->flags |= port_info->flags;
3764 ap->ops = port_info->port_ops;
3765 ap->cbl = ATA_CBL_SATA;
3769 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3772 * ata_sas_port_start - Set port up for dma.
3773 * @ap: Port to initialize
3775 * Called just after data structures for each port are
3778 * May be used as the port_start() entry in ata_port_operations.
3781 * Inherited from caller.
3783 int ata_sas_port_start(struct ata_port *ap)
3787 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3790 * ata_port_stop - Undo ata_sas_port_start()
3791 * @ap: Port to shut down
3793 * May be used as the port_stop() entry in ata_port_operations.
3796 * Inherited from caller.
3799 void ata_sas_port_stop(struct ata_port *ap)
3802 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3805 * ata_sas_port_init - Initialize a SATA device
3806 * @ap: SATA port to initialize
3809 * PCI/etc. bus probe sem.
3812 * Zero on success, non-zero on error.
3815 int ata_sas_port_init(struct ata_port *ap)
3817 int rc = ap->ops->port_start(ap);
3820 ap->print_id = ata_print_id++;
3821 rc = ata_bus_probe(ap);
3826 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3829 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3830 * @ap: SATA port to destroy
3834 void ata_sas_port_destroy(struct ata_port *ap)
3836 if (ap->ops->port_stop)
3837 ap->ops->port_stop(ap);
3840 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3843 * ata_sas_slave_configure - Default slave_config routine for libata devices
3844 * @sdev: SCSI device to configure
3845 * @ap: ATA port to which SCSI device is attached
3851 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3853 ata_scsi_sdev_config(sdev);
3854 ata_scsi_dev_config(sdev, ap->link.device);
3857 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3860 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3861 * @cmd: SCSI command to be sent
3862 * @done: Completion function, called when command is complete
3863 * @ap: ATA port to which the command is being sent
3866 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3870 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3871 struct ata_port *ap)
3875 ata_scsi_dump_cdb(ap, cmd);
3877 if (likely(ata_dev_enabled(ap->link.device)))
3878 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3880 cmd->result = (DID_BAD_TARGET << 16);
3885 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);